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         SCTP_IPI_ADDR_LOCK_ASSERT();
 204         hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
 205         LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) {
 206                 if (sctp_ifnp->ifn_index == ifn_index) {
 207                         return (sctp_ifnp);
 208                 }
 209                 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) {
 210                         return (sctp_ifnp);
 211                 }
 212         }
 213         return (NULL);
 214 }
 215
 216
 217 struct sctp_vrf *
 218 sctp_find_vrf(uint32_t vrf_id)
 219 {
 220         struct sctp_vrflist *bucket;
 221         struct sctp_vrf *liste;
 222
 223         bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
 224         LIST_FOREACH(liste, bucket, next_vrf) {
 225                 if (vrf_id == liste->vrf_id) {
 226                         return (liste);
 227                 }
 228         }
 229         return (NULL);
 230 }
 231
 232
 233 void
 234 sctp_free_vrf(struct sctp_vrf *vrf)
 235 {
 236         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) {
 237                 if (vrf->vrf_addr_hash) {
 238                         SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
 239                         vrf->vrf_addr_hash = NULL;
 240                 }
 241                 /* We zero'd the count */
 242                 LIST_REMOVE(vrf, next_vrf);
 243                 SCTP_FREE(vrf, SCTP_M_VRF);
 244                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
 245         }
 246 }
 247
 248
 249 void
 250 sctp_free_ifn(struct sctp_ifn *sctp_ifnp)
 251 {
 252         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) {
 253                 /* We zero'd the count */
 254                 if (sctp_ifnp->vrf) {
 255                         sctp_free_vrf(sctp_ifnp->vrf);
 256                 }
 257                 SCTP_FREE(sctp_ifnp, SCTP_M_IFN);
 258                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
 259         }
 260 }
 261
 262
 263 void
 264 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu)
 265 {
 266         struct sctp_ifn *sctp_ifnp;
 267
 268         sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index);
 269         if (sctp_ifnp != NULL) {
 270                 sctp_ifnp->ifn_mtu = mtu;
 271         }
 272 }
 273
 274
 275 void
 276 sctp_free_ifa(struct sctp_ifa *sctp_ifap)
 277 {
 278         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) {
 279                 /* We zero'd the count */
 280                 if (sctp_ifap->ifn_p) {
 281                         sctp_free_ifn(sctp_ifap->ifn_p);
 282                 }
 283                 SCTP_FREE(sctp_ifap, SCTP_M_IFA);
 284                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
 285         }
 286 }
 287
 288
 289 static void
 290 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock)
 291 {
 292         struct sctp_ifn *found;
 293
 294         found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index);
 295         if (found == NULL) {
 296                 /* Not in the list.. sorry */
 297                 return;
 298         }
 299         if (hold_addr_lock == 0) {
 300                 SCTP_IPI_ADDR_WLOCK();
 301         } else {
 302                 SCTP_IPI_ADDR_WLOCK_ASSERT();
 303         }
 304         LIST_REMOVE(sctp_ifnp, next_bucket);
 305         LIST_REMOVE(sctp_ifnp, next_ifn);
 306         if (hold_addr_lock == 0) {
 307                 SCTP_IPI_ADDR_WUNLOCK();
 308         }
 309         /* Take away the reference, and possibly free it */
 310         sctp_free_ifn(sctp_ifnp);
 311 }
 312
 313
 314 void
 315 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr,
 316     const char *if_name, uint32_t ifn_index)
 317 {
 318         struct sctp_vrf *vrf;
 319         struct sctp_ifa *sctp_ifap;
 320
 321         SCTP_IPI_ADDR_RLOCK();
 322         vrf = sctp_find_vrf(vrf_id);
 323         if (vrf == NULL) {
 324                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 325                 goto out;
 326
 327         }
 328         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 329         if (sctp_ifap == NULL) {
 330                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
 331                 goto out;
 332         }
 333         if (sctp_ifap->ifn_p == NULL) {
 334                 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unusable\n");
 335                 goto out;
 336         }
 337         if (if_name) {
 338                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) {
 339                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
 340                             sctp_ifap->ifn_p->ifn_name, if_name);
 341                         goto out;
 342                 }
 343         } else {
 344                 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
 345                         SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
 346                             sctp_ifap->ifn_p->ifn_index, ifn_index);
 347                         goto out;
 348                 }
 349         }
 350
 351         sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID);
 352         sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE;
 353 out:
 354         SCTP_IPI_ADDR_RUNLOCK();
 355 }
 356
 357
 358 void
 359 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr,
 360     const char *if_name, uint32_t ifn_index)
 361 {
 362         struct sctp_vrf *vrf;
 363         struct sctp_ifa *sctp_ifap;
 364
 365         SCTP_IPI_ADDR_RLOCK();
 366         vrf = sctp_find_vrf(vrf_id);
 367         if (vrf == NULL) {
 368                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 369                 goto out;
 370
 371         }
 372         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 373         if (sctp_ifap == NULL) {
 374                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
 375                 goto out;
 376         }
 377         if (sctp_ifap->ifn_p == NULL) {
 378                 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unusable\n");
 379                 goto out;
 380         }
 381         if (if_name) {
 382                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) {
 383                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
 384                             sctp_ifap->ifn_p->ifn_name, if_name);
 385                         goto out;
 386                 }
 387         } else {
 388                 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
 389                         SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
 390                             sctp_ifap->ifn_p->ifn_index, ifn_index);
 391                         goto out;
 392                 }
 393         }
 394
 395         sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE);
 396         sctp_ifap->localifa_flags |= SCTP_ADDR_VALID;
 397 out:
 398         SCTP_IPI_ADDR_RUNLOCK();
 399 }
 400
 401
 402 /*-
 403  * Add an ifa to an ifn.
 404  * Register the interface as necessary.
 405  * NOTE: ADDR write lock MUST be held.
 406  */
 407 static void
 408 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap)
 409 {
 410         int ifa_af;
 411
 412         LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
 413         sctp_ifap->ifn_p = sctp_ifnp;
 414         atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
 415         /* update address counts */
 416         sctp_ifnp->ifa_count++;
 417         ifa_af = sctp_ifap->address.sa.sa_family;
 418         switch (ifa_af) {
 419 #ifdef INET
 420         case AF_INET:
 421                 sctp_ifnp->num_v4++;
 422                 break;
 423 #endif
 424 #ifdef INET6
 425         case AF_INET6:
 426                 sctp_ifnp->num_v6++;
 427                 break;
 428 #endif
 429         default:
 430                 break;
 431         }
 432         if (sctp_ifnp->ifa_count == 1) {
 433                 /* register the new interface */
 434                 sctp_ifnp->registered_af = ifa_af;
 435         }
 436 }
 437
 438
 439 /*-
 440  * Remove an ifa from its ifn.
 441  * If no more addresses exist, remove the ifn too. Otherwise, re-register
 442  * the interface based on the remaining address families left.
 443  * NOTE: ADDR write lock MUST be held.
 444  */
 445 static void
 446 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap)
 447 {
 448         LIST_REMOVE(sctp_ifap, next_ifa);
 449         if (sctp_ifap->ifn_p) {
 450                 /* update address counts */
 451                 sctp_ifap->ifn_p->ifa_count--;
 452                 switch (sctp_ifap->address.sa.sa_family) {
 453 #ifdef INET
 454                 case AF_INET:
 455                         sctp_ifap->ifn_p->num_v4--;
 456                         break;
 457 #endif
 458 #ifdef INET6
 459                 case AF_INET6:
 460                         sctp_ifap->ifn_p->num_v6--;
 461                         break;
 462 #endif
 463                 default:
 464                         break;
 465                 }
 466
 467                 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) {
 468                         /* remove the ifn, possibly freeing it */
 469                         sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED);
 470                 } else {
 471                         /* re-register address family type, if needed */
 472                         if ((sctp_ifap->ifn_p->num_v6 == 0) &&
 473                             (sctp_ifap->ifn_p->registered_af == AF_INET6)) {
 474                                 sctp_ifap->ifn_p->registered_af = AF_INET;
 475                         } else if ((sctp_ifap->ifn_p->num_v4 == 0) &&
 476                             (sctp_ifap->ifn_p->registered_af == AF_INET)) {
 477                                 sctp_ifap->ifn_p->registered_af = AF_INET6;
 478                         }
 479                         /* free the ifn refcount */
 480                         sctp_free_ifn(sctp_ifap->ifn_p);
 481                 }
 482                 sctp_ifap->ifn_p = NULL;
 483         }
 484 }
 485
 486
 487 struct sctp_ifa *
 488 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index,
 489     uint32_t ifn_type, const char *if_name, void *ifa,
 490     struct sockaddr *addr, uint32_t ifa_flags,
 491     int dynamic_add)
 492 {
 493         struct sctp_vrf *vrf;
 494         struct sctp_ifn *sctp_ifnp, *new_sctp_ifnp;
 495         struct sctp_ifa *sctp_ifap, *new_sctp_ifap;
 496         struct sctp_ifalist *hash_addr_head;
 497         struct sctp_ifnlist *hash_ifn_head;
 498         uint32_t hash_of_addr;
 499         int new_ifn_af = 0;
 500
 501 #ifdef SCTP_DEBUG
 502         SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id);
 503         SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
 504 #endif
 505         SCTP_MALLOC(new_sctp_ifnp, struct sctp_ifn *,
 506             sizeof(struct sctp_ifn), SCTP_M_IFN);
 507         if (new_sctp_ifnp == NULL) {
 508 #ifdef INVARIANTS
 509                 panic("No memory for IFN");
 510 #endif
 511                 return (NULL);
 512         }
 513         SCTP_MALLOC(new_sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA);
 514         if (new_sctp_ifap == NULL) {
 515 #ifdef INVARIANTS
 516                 panic("No memory for IFA");
 517 #endif
 518                 SCTP_FREE(new_sctp_ifnp, SCTP_M_IFN);
 519                 return (NULL);
 520         }
 521
 522         SCTP_IPI_ADDR_WLOCK();
 523         sctp_ifnp = sctp_find_ifn(ifn, ifn_index);
 524         if (sctp_ifnp) {
 525                 vrf = sctp_ifnp->vrf;
 526         } else {
 527                 vrf = sctp_find_vrf(vrf_id);
 528                 if (vrf == NULL) {
 529                         vrf = sctp_allocate_vrf(vrf_id);
 530                         if (vrf == NULL) {
 531                                 SCTP_IPI_ADDR_WUNLOCK();
 532                                 SCTP_FREE(new_sctp_ifnp, SCTP_M_IFN);
 533                                 SCTP_FREE(new_sctp_ifap, SCTP_M_IFA);
 534                                 return (NULL);
 535                         }
 536                 }
 537         }
 538         if (sctp_ifnp == NULL) {
 539                 /*
 540                  * build one and add it, can't hold lock until after malloc
 541                  * done though.
 542                  */
 543                 sctp_ifnp = new_sctp_ifnp;
 544                 new_sctp_ifnp = NULL;
 545                 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn));
 546                 sctp_ifnp->ifn_index = ifn_index;
 547                 sctp_ifnp->ifn_p = ifn;
 548                 sctp_ifnp->ifn_type = ifn_type;
 549                 sctp_ifnp->refcount = 0;
 550                 sctp_ifnp->vrf = vrf;
 551                 atomic_add_int(&vrf->refcount, 1);
 552                 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family);
 553                 if (if_name != NULL) {
 554                         SCTP_SNPRINTF(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", if_name);
 555                 } else {
 556                         SCTP_SNPRINTF(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", "unknown");
 557                 }
 558                 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
 559                 LIST_INIT(&sctp_ifnp->ifalist);
 560                 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket);
 561                 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn);
 562                 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
 563                 new_ifn_af = 1;
 564         }
 565         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 566         if (sctp_ifap) {
 567                 /* Hmm, it already exists? */
 568                 if ((sctp_ifap->ifn_p) &&
 569                     (sctp_ifap->ifn_p->ifn_index == ifn_index)) {
 570                         SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n",
 571                             sctp_ifap->ifn_p->ifn_name, ifn_index,
 572                             (void *)sctp_ifap);
 573                         if (new_ifn_af) {
 574                                 /* Remove the created one that we don't want */
 575                                 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED);
 576                         }
 577                         if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) {
 578                                 /* easy to solve, just switch back to active */
 579                                 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n");
 580                                 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
 581                                 sctp_ifap->ifn_p = sctp_ifnp;
 582                                 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
 583                         }
 584         exit_stage_left:
 585                         SCTP_IPI_ADDR_WUNLOCK();
 586                         if (new_sctp_ifnp != NULL) {
 587                                 SCTP_FREE(new_sctp_ifnp, SCTP_M_IFN);
 588                         }
 589                         SCTP_FREE(new_sctp_ifap, SCTP_M_IFA);
 590                         return (sctp_ifap);
 591                 } else {
 592                         if (sctp_ifap->ifn_p) {
 593                                 /*
 594                                  * The last IFN gets the address, remove the
 595                                  * old one
 596                                  */
 597                                 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n",
 598                                     (void *)sctp_ifap, sctp_ifap->ifn_p->ifn_name,
 599                                     sctp_ifap->ifn_p->ifn_index, if_name,
 600                                     ifn_index);
 601                                 /* remove the address from the old ifn */
 602                                 sctp_remove_ifa_from_ifn(sctp_ifap);
 603                                 /* move the address over to the new ifn */
 604                                 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
 605                                 goto exit_stage_left;
 606                         } else {
 607                                 /* repair ifnp which was NULL ? */
 608                                 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
 609                                 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n",
 610                                     (void *)sctp_ifnp, (void *)sctp_ifap);
 611                                 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
 612                         }
 613                         goto exit_stage_left;
 614                 }
 615         }
 616         sctp_ifap = new_sctp_ifap;
 617         memset(sctp_ifap, 0, sizeof(struct sctp_ifa));
 618         sctp_ifap->ifn_p = sctp_ifnp;
 619         atomic_add_int(&sctp_ifnp->refcount, 1);
 620         sctp_ifap->vrf_id = vrf_id;
 621         sctp_ifap->ifa = ifa;
 622         memcpy(&sctp_ifap->address, addr, addr->sa_len);
 623         sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE;
 624         sctp_ifap->flags = ifa_flags;
 625         /* Set scope */
 626         switch (sctp_ifap->address.sa.sa_family) {
 627 #ifdef INET
 628         case AF_INET:
 629                 {
 630                         struct sockaddr_in *sin;
 631
 632                         sin = &sctp_ifap->address.sin;
 633                         if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
 634                             (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) {
 635                                 sctp_ifap->src_is_loop = 1;
 636                         }
 637                         if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
 638                                 sctp_ifap->src_is_priv = 1;
 639                         }
 640                         sctp_ifnp->num_v4++;
 641                         if (new_ifn_af)
 642                                 new_ifn_af = AF_INET;
 643                         break;
 644                 }
 645 #endif
 646 #ifdef INET6
 647         case AF_INET6:
 648                 {
 649                         /* ok to use deprecated addresses? */
 650                         struct sockaddr_in6 *sin6;
 651
 652                         sin6 = &sctp_ifap->address.sin6;
 653                         if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
 654                             (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) {
 655                                 sctp_ifap->src_is_loop = 1;
 656                         }
 657                         if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
 658                                 sctp_ifap->src_is_priv = 1;
 659                         }
 660                         sctp_ifnp->num_v6++;
 661                         if (new_ifn_af)
 662                                 new_ifn_af = AF_INET6;
 663                         break;
 664                 }
 665 #endif
 666         default:
 667                 new_ifn_af = 0;
 668                 break;
 669         }
 670         hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa);
 671
 672         if ((sctp_ifap->src_is_priv == 0) &&
 673             (sctp_ifap->src_is_loop == 0)) {
 674                 sctp_ifap->src_is_glob = 1;
 675         }
 676         hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)];
 677         LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket);
 678         sctp_ifap->refcount = 1;
 679         LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
 680         sctp_ifnp->ifa_count++;
 681         vrf->total_ifa_count++;
 682         atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
 683         if (new_ifn_af) {
 684                 sctp_ifnp->registered_af = new_ifn_af;
 685         }
 686         SCTP_IPI_ADDR_WUNLOCK();
 687         if (new_sctp_ifnp != NULL) {
 688                 SCTP_FREE(new_sctp_ifnp, SCTP_M_IFN);
 689         }
 690
 691         if (dynamic_add) {
 692                 /*
 693                  * Bump up the refcount so that when the timer completes it
 694                  * will drop back down.
 695                  */
 696                 struct sctp_laddr *wi;
 697
 698                 atomic_add_int(&sctp_ifap->refcount, 1);
 699                 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
 700                 if (wi == NULL) {
 701                         /*
 702                          * Gak, what can we do? We have lost an address
 703                          * change can you say HOSED?
 704                          */
 705                         SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
 706                         /* Opps, must decrement the count */
 707                         sctp_del_addr_from_vrf(vrf_id, addr, ifn_index,
 708                             if_name);
 709                         return (NULL);
 710                 }
 711                 SCTP_INCR_LADDR_COUNT();
 712                 memset(wi, 0, sizeof(*wi));
 713                 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
 714                 wi->ifa = sctp_ifap;
 715                 wi->action = SCTP_ADD_IP_ADDRESS;
 716
 717                 SCTP_WQ_ADDR_LOCK();
 718                 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
 719                 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
 720                     (struct sctp_inpcb *)NULL,
 721                     (struct sctp_tcb *)NULL,
 722                     (struct sctp_nets *)NULL);
 723                 SCTP_WQ_ADDR_UNLOCK();
 724         } else {
 725                 /* it's ready for use */
 726                 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
 727         }
 728         return (sctp_ifap);
 729 }
 730
 731 void
 732 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr,
 733     uint32_t ifn_index, const char *if_name)
 734 {
 735         struct sctp_vrf *vrf;
 736         struct sctp_ifa *sctp_ifap = NULL;
 737
 738         SCTP_IPI_ADDR_WLOCK();
 739         vrf = sctp_find_vrf(vrf_id);
 740         if (vrf == NULL) {
 741                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 742                 goto out_now;
 743         }
 744
 745 #ifdef SCTP_DEBUG
 746         SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id);
 747         SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
 748 #endif
 749         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 750         if (sctp_ifap) {
 751                 /* Validate the delete */
 752                 if (sctp_ifap->ifn_p) {
 753                         int valid = 0;
 754
 755                         /*-
 756                          * The name has priority over the ifn_index
 757                          * if its given.
 758                          */
 759                         if (if_name) {
 760                                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) == 0) {
 761                                         /* They match its a correct delete */
 762                                         valid = 1;
 763                                 }
 764                         }
 765                         if (!valid) {
 766                                 /* last ditch check ifn_index */
 767                                 if (ifn_index == sctp_ifap->ifn_p->ifn_index) {
 768                                         valid = 1;
 769                                 }
 770                         }
 771                         if (!valid) {
 772                                 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n",
 773                                     ifn_index, ((if_name == NULL) ? "NULL" : if_name));
 774                                 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n",
 775                                     sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name);
 776                                 SCTP_IPI_ADDR_WUNLOCK();
 777                                 return;
 778                         }
 779                 }
 780                 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", (void *)sctp_ifap);
 781                 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID;
 782                 /*
 783                  * We don't set the flag. This means that the structure will
 784                  * hang around in EP's that have bound specific to it until
 785                  * they close. This gives us TCP like behavior if someone
 786                  * removes an address (or for that matter adds it right
 787                  * back).
 788                  */
 789                 /* sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; */
 790                 vrf->total_ifa_count--;
 791                 LIST_REMOVE(sctp_ifap, next_bucket);
 792                 sctp_remove_ifa_from_ifn(sctp_ifap);
 793         }
 794 #ifdef SCTP_DEBUG
 795         else {
 796                 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:",
 797                     ifn_index);
 798                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
 799         }
 800 #endif
 801
 802 out_now:
 803         SCTP_IPI_ADDR_WUNLOCK();
 804         if (sctp_ifap) {
 805                 struct sctp_laddr *wi;
 806
 807                 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
 808                 if (wi == NULL) {
 809                         /*
 810                          * Gak, what can we do? We have lost an address
 811                          * change can you say HOSED?
 812                          */
 813                         SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
 814
 815                         /* Oops, must decrement the count */
 816                         sctp_free_ifa(sctp_ifap);
 817                         return;
 818                 }
 819                 SCTP_INCR_LADDR_COUNT();
 820                 memset(wi, 0, sizeof(*wi));
 821                 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
 822                 wi->ifa = sctp_ifap;
 823                 wi->action = SCTP_DEL_IP_ADDRESS;
 824                 SCTP_WQ_ADDR_LOCK();
 825                 /*
 826                  * Should this really be a tailq? As it is we will process
 827                  * the newest first :-0
 828                  */
 829                 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
 830                 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
 831                     (struct sctp_inpcb *)NULL,
 832                     (struct sctp_tcb *)NULL,
 833                     (struct sctp_nets *)NULL);
 834                 SCTP_WQ_ADDR_UNLOCK();
 835         }
 836         return;
 837 }
 838
 839
 840 static int
 841 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to)
 842 {
 843         int loopback_scope;
 844 #if defined(INET)
 845         int ipv4_local_scope, ipv4_addr_legal;
 846 #endif
 847 #if defined(INET6)
 848         int local_scope, site_scope, ipv6_addr_legal;
 849 #endif
 850         struct sctp_vrf *vrf;
 851         struct sctp_ifn *sctp_ifn;
 852         struct sctp_ifa *sctp_ifa;
 853
 854         loopback_scope = stcb->asoc.scope.loopback_scope;
 855 #if defined(INET)
 856         ipv4_local_scope = stcb->asoc.scope.ipv4_local_scope;
 857         ipv4_addr_legal = stcb->asoc.scope.ipv4_addr_legal;
 858 #endif
 859 #if defined(INET6)
 860         local_scope = stcb->asoc.scope.local_scope;
 861         site_scope = stcb->asoc.scope.site_scope;
 862         ipv6_addr_legal = stcb->asoc.scope.ipv6_addr_legal;
 863 #endif
 864
 865         SCTP_IPI_ADDR_RLOCK();
 866         vrf = sctp_find_vrf(stcb->asoc.vrf_id);
 867         if (vrf == NULL) {
 868                 /* no vrf, no addresses */
 869                 SCTP_IPI_ADDR_RUNLOCK();
 870                 return (0);
 871         }
 872
 873         if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
 874                 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
 875                         if ((loopback_scope == 0) &&
 876                             SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
 877                                 continue;
 878                         }
 879                         LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
 880                                 if (sctp_is_addr_restricted(stcb, sctp_ifa) &&
 881                                     (!sctp_is_addr_pending(stcb, sctp_ifa))) {
 882                                         /*
 883                                          * We allow pending addresses, where
 884                                          * we have sent an asconf-add to be
 885                                          * considered valid.
 886                                          */
 887                                         continue;
 888                                 }
 889                                 if (sctp_ifa->address.sa.sa_family != to->sa_family) {
 890                                         continue;
 891                                 }
 892                                 switch (sctp_ifa->address.sa.sa_family) {
 893 #ifdef INET
 894                                 case AF_INET:
 895                                         if (ipv4_addr_legal) {
 896                                                 struct sockaddr_in *sin,
 897                                                            *rsin;
 898
 899                                                 sin = &sctp_ifa->address.sin;
 900                                                 rsin = (struct sockaddr_in *)to;
 901                                                 if ((ipv4_local_scope == 0) &&
 902                                                     IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
 903                                                         continue;
 904                                                 }
 905                                                 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred,
 906                                                     &sin->sin_addr) != 0) {
 907                                                         continue;
 908                                                 }
 909                                                 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
 910                                                         SCTP_IPI_ADDR_RUNLOCK();
 911                                                         return (1);
 912                                                 }
 913                                         }
 914                                         break;
 915 #endif
 916 #ifdef INET6
 917                                 case AF_INET6:
 918                                         if (ipv6_addr_legal) {
 919                                                 struct sockaddr_in6 *sin6,
 920                                                             *rsin6;
 921
 922                                                 sin6 = &sctp_ifa->address.sin6;
 923                                                 rsin6 = (struct sockaddr_in6 *)to;
 924                                                 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred,
 925                                                     &sin6->sin6_addr) != 0) {
 926                                                         continue;
 927                                                 }
 928                                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
 929                                                         if (local_scope == 0)
 930                                                                 continue;
 931                                                         if (sin6->sin6_scope_id == 0) {
 932                                                                 if (sa6_recoverscope(sin6) != 0)
 933                                                                         continue;
 934                                                         }
 935                                                 }
 936                                                 if ((site_scope == 0) &&
 937                                                     (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) {
 938                                                         continue;
 939                                                 }
 940                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
 941                                                         SCTP_IPI_ADDR_RUNLOCK();
 942                                                         return (1);
 943                                                 }
 944                                         }
 945                                         break;
 946 #endif
 947                                 default:
 948                                         /* TSNH */
 949                                         break;
 950                                 }
 951                         }
 952                 }
 953         } else {
 954                 struct sctp_laddr *laddr;
 955
 956                 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
 957                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
 958                                 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
 959                                 continue;
 960                         }
 961                         if (sctp_is_addr_restricted(stcb, laddr->ifa) &&
 962                             (!sctp_is_addr_pending(stcb, laddr->ifa))) {
 963                                 /*
 964                                  * We allow pending addresses, where we have
 965                                  * sent an asconf-add to be considered
 966                                  * valid.
 967                                  */
 968                                 continue;
 969                         }
 970                         if (laddr->ifa->address.sa.sa_family != to->sa_family) {
 971                                 continue;
 972                         }
 973                         switch (to->sa_family) {
 974 #ifdef INET
 975                         case AF_INET:
 976                                 {
 977                                         struct sockaddr_in *sin, *rsin;
 978
 979                                         sin = &laddr->ifa->address.sin;
 980                                         rsin = (struct sockaddr_in *)to;
 981                                         if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
 982                                                 SCTP_IPI_ADDR_RUNLOCK();
 983                                                 return (1);
 984                                         }
 985                                         break;
 986                                 }
 987 #endif
 988 #ifdef INET6
 989                         case AF_INET6:
 990                                 {
 991                                         struct sockaddr_in6 *sin6, *rsin6;
 992
 993                                         sin6 = &laddr->ifa->address.sin6;
 994                                         rsin6 = (struct sockaddr_in6 *)to;
 995                                         if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
 996                                                 SCTP_IPI_ADDR_RUNLOCK();
 997                                                 return (1);
 998                                         }
 999                                         break;
1000                                 }
1001
1002 #endif
1003                         default:
1004                                 /* TSNH */
1005                                 break;
1006                         }
1007
1008                 }
1009         }
1010         SCTP_IPI_ADDR_RUNLOCK();
1011         return (0);
1012 }
1013
1014
1015 static struct sctp_tcb *
1016 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from,
1017     struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id)
1018 {
1019         /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */
1020         /*
1021          * If we support the TCP model, then we must now dig through to see
1022          * if we can find our endpoint in the list of tcp ep's.
1023          */
1024         uint16_t lport, rport;
1025         struct sctppcbhead *ephead;
1026         struct sctp_inpcb *inp;
1027         struct sctp_laddr *laddr;
1028         struct sctp_tcb *stcb;
1029         struct sctp_nets *net;
1030
1031         if ((to == NULL) || (from == NULL)) {
1032                 return (NULL);
1033         }
1034
1035         switch (to->sa_family) {
1036 #ifdef INET
1037         case AF_INET:
1038                 if (from->sa_family == AF_INET) {
1039                         lport = ((struct sockaddr_in *)to)->sin_port;
1040                         rport = ((struct sockaddr_in *)from)->sin_port;
1041                 } else {
1042                         return (NULL);
1043                 }
1044                 break;
1045 #endif
1046 #ifdef INET6
1047         case AF_INET6:
1048                 if (from->sa_family == AF_INET6) {
1049                         lport = ((struct sockaddr_in6 *)to)->sin6_port;
1050                         rport = ((struct sockaddr_in6 *)from)->sin6_port;
1051                 } else {
1052                         return (NULL);
1053                 }
1054                 break;
1055 #endif
1056         default:
1057                 return (NULL);
1058         }
1059         ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
1060         /*
1061          * Ok now for each of the guys in this bucket we must look and see:
1062          * - Does the remote port match. - Does there single association's
1063          * addresses match this address (to). If so we update p_ep to point
1064          * to this ep and return the tcb from it.
1065          */
1066         LIST_FOREACH(inp, ephead, sctp_hash) {
1067                 SCTP_INP_RLOCK(inp);
1068                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1069                         SCTP_INP_RUNLOCK(inp);
1070                         continue;
1071                 }
1072                 if (lport != inp->sctp_lport) {
1073                         SCTP_INP_RUNLOCK(inp);
1074                         continue;
1075                 }
1076                 switch (to->sa_family) {
1077 #ifdef INET
1078                 case AF_INET:
1079                         {
1080                                 struct sockaddr_in *sin;
1081
1082                                 sin = (struct sockaddr_in *)to;
1083                                 if (prison_check_ip4(inp->ip_inp.inp.inp_cred,
1084                                     &sin->sin_addr) != 0) {
1085                                         SCTP_INP_RUNLOCK(inp);
1086                                         continue;
1087                                 }
1088                                 break;
1089                         }
1090 #endif
1091 #ifdef INET6
1092                 case AF_INET6:
1093                         {
1094                                 struct sockaddr_in6 *sin6;
1095
1096                                 sin6 = (struct sockaddr_in6 *)to;
1097                                 if (prison_check_ip6(inp->ip_inp.inp.inp_cred,
1098                                     &sin6->sin6_addr) != 0) {
1099                                         SCTP_INP_RUNLOCK(inp);
1100                                         continue;
1101                                 }
1102                                 break;
1103                         }
1104 #endif
1105                 default:
1106                         SCTP_INP_RUNLOCK(inp);
1107                         continue;
1108                 }
1109                 if (inp->def_vrf_id != vrf_id) {
1110                         SCTP_INP_RUNLOCK(inp);
1111                         continue;
1112                 }
1113                 /* check to see if the ep has one of the addresses */
1114                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
1115                         /* We are NOT bound all, so look further */
1116                         int match = 0;
1117
1118                         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1119
1120                                 if (laddr->ifa == NULL) {
1121                                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __func__);
1122                                         continue;
1123                                 }
1124                                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1125                                         SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
1126                                         continue;
1127                                 }
1128                                 if (laddr->ifa->address.sa.sa_family ==
1129                                     to->sa_family) {
1130                                         /* see if it matches */
1131 #ifdef INET
1132                                         if (from->sa_family == AF_INET) {
1133                                                 struct sockaddr_in *intf_addr,
1134                                                            *sin;
1135
1136                                                 intf_addr = &laddr->ifa->address.sin;
1137                                                 sin = (struct sockaddr_in *)to;
1138                                                 if (sin->sin_addr.s_addr ==
1139                                                     intf_addr->sin_addr.s_addr) {
1140                                                         match = 1;
1141                                                         break;
1142                                                 }
1143                                         }
1144 #endif
1145 #ifdef INET6
1146                                         if (from->sa_family == AF_INET6) {
1147                                                 struct sockaddr_in6 *intf_addr6;
1148                                                 struct sockaddr_in6 *sin6;
1149
1150                                                 sin6 = (struct sockaddr_in6 *)
1151                                                     to;
1152                                                 intf_addr6 = &laddr->ifa->address.sin6;
1153
1154                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1155                                                     intf_addr6)) {
1156                                                         match = 1;
1157                                                         break;
1158                                                 }
1159                                         }
1160 #endif
1161                                 }
1162                         }
1163                         if (match == 0) {
1164                                 /* This endpoint does not have this address */
1165                                 SCTP_INP_RUNLOCK(inp);
1166                                 continue;
1167                         }
1168                 }
1169                 /*
1170                  * Ok if we hit here the ep has the address, does it hold
1171                  * the tcb?
1172                  */
1173                 /* XXX: Why don't we TAILQ_FOREACH through sctp_asoc_list? */
1174                 stcb = LIST_FIRST(&inp->sctp_asoc_list);
1175                 if (stcb == NULL) {
1176                         SCTP_INP_RUNLOCK(inp);
1177                         continue;
1178                 }
1179                 SCTP_TCB_LOCK(stcb);
1180                 if (!sctp_does_stcb_own_this_addr(stcb, to)) {
1181                         SCTP_TCB_UNLOCK(stcb);
1182                         SCTP_INP_RUNLOCK(inp);
1183                         continue;
1184                 }
1185                 if (stcb->rport != rport) {
1186                         /* remote port does not match. */
1187                         SCTP_TCB_UNLOCK(stcb);
1188                         SCTP_INP_RUNLOCK(inp);
1189                         continue;
1190                 }
1191                 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1192                         SCTP_TCB_UNLOCK(stcb);
1193                         SCTP_INP_RUNLOCK(inp);
1194                         continue;
1195                 }
1196                 if (!sctp_does_stcb_own_this_addr(stcb, to)) {
1197                         SCTP_TCB_UNLOCK(stcb);
1198                         SCTP_INP_RUNLOCK(inp);
1199                         continue;
1200                 }
1201                 /* Does this TCB have a matching address? */
1202                 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1203
1204                         if (net->ro._l_addr.sa.sa_family != from->sa_family) {
1205                                 /* not the same family, can't be a match */
1206                                 continue;
1207                         }
1208                         switch (from->sa_family) {
1209 #ifdef INET
1210                         case AF_INET:
1211                                 {
1212                                         struct sockaddr_in *sin, *rsin;
1213
1214                                         sin = (struct sockaddr_in *)&net->ro._l_addr;
1215                                         rsin = (struct sockaddr_in *)from;
1216                                         if (sin->sin_addr.s_addr ==
1217                                             rsin->sin_addr.s_addr) {
1218                                                 /* found it */
1219                                                 if (netp != NULL) {
1220                                                         *netp = net;
1221                                                 }
1222                                                 /*
1223                                                  * Update the endpoint
1224                                                  * pointer
1225                                                  */
1226                                                 *inp_p = inp;
1227                                                 SCTP_INP_RUNLOCK(inp);
1228                                                 return (stcb);
1229                                         }
1230                                         break;
1231                                 }
1232 #endif
1233 #ifdef INET6
1234                         case AF_INET6:
1235                                 {
1236                                         struct sockaddr_in6 *sin6, *rsin6;
1237
1238                                         sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1239                                         rsin6 = (struct sockaddr_in6 *)from;
1240                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
1241                                             rsin6)) {
1242                                                 /* found it */
1243                                                 if (netp != NULL) {
1244                                                         *netp = net;
1245                                                 }
1246                                                 /*
1247                                                  * Update the endpoint
1248                                                  * pointer
1249                                                  */
1250                                                 *inp_p = inp;
1251                                                 SCTP_INP_RUNLOCK(inp);
1252                                                 return (stcb);
1253                                         }
1254                                         break;
1255                                 }
1256 #endif
1257                         default:
1258                                 /* TSNH */
1259                                 break;
1260                         }
1261                 }
1262                 SCTP_TCB_UNLOCK(stcb);
1263                 SCTP_INP_RUNLOCK(inp);
1264         }
1265         return (NULL);
1266 }
1267
1268
1269 /*
1270  * rules for use
1271  *
1272  * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an
1273  * stcb, both will be locked (locked_tcb and stcb) but decrement will be done
1274  * (if locked == NULL). 3) Decrement happens on return ONLY if locked ==
1275  * NULL.
1276  */
1277
1278 struct sctp_tcb *
1279 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote,
1280     struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb)
1281 {
1282         struct sctpasochead *head;
1283         struct sctp_inpcb *inp;
1284         struct sctp_tcb *stcb = NULL;
1285         struct sctp_nets *net;
1286         uint16_t rport;
1287
1288         inp = *inp_p;
1289         switch (remote->sa_family) {
1290 #ifdef INET
1291         case AF_INET:
1292                 rport = (((struct sockaddr_in *)remote)->sin_port);
1293                 break;
1294 #endif
1295 #ifdef INET6
1296         case AF_INET6:
1297                 rport = (((struct sockaddr_in6 *)remote)->sin6_port);
1298                 break;
1299 #endif
1300         default:
1301                 return (NULL);
1302         }
1303         if (locked_tcb) {
1304                 /*
1305                  * UN-lock so we can do proper locking here this occurs when
1306                  * called from load_addresses_from_init.
1307                  */
1308                 atomic_add_int(&locked_tcb->asoc.refcnt, 1);
1309                 SCTP_TCB_UNLOCK(locked_tcb);
1310         }
1311         SCTP_INP_INFO_RLOCK();
1312         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
1313             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
1314                 /*-
1315                  * Now either this guy is our listener or it's the
1316                  * connector. If it is the one that issued the connect, then
1317                  * it's only chance is to be the first TCB in the list. If
1318                  * it is the acceptor, then do the special_lookup to hash
1319                  * and find the real inp.
1320                  */
1321                 if ((inp->sctp_socket) && SCTP_IS_LISTENING(inp)) {
1322                         /* to is peer addr, from is my addr */
1323                         stcb = sctp_tcb_special_locate(inp_p, remote, local,
1324                             netp, inp->def_vrf_id);
1325                         if ((stcb != NULL) && (locked_tcb == NULL)) {
1326                                 /* we have a locked tcb, lower refcount */
1327                                 SCTP_INP_DECR_REF(inp);
1328                         }
1329                         if ((locked_tcb != NULL) && (locked_tcb != stcb)) {
1330                                 SCTP_INP_RLOCK(locked_tcb->sctp_ep);
1331                                 SCTP_TCB_LOCK(locked_tcb);
1332                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1333                                 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep);
1334                         }
1335                         SCTP_INP_INFO_RUNLOCK();
1336                         return (stcb);
1337                 } else {
1338                         SCTP_INP_WLOCK(inp);
1339                         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1340                                 goto null_return;
1341                         }
1342                         stcb = LIST_FIRST(&inp->sctp_asoc_list);
1343                         if (stcb == NULL) {
1344                                 goto null_return;
1345                         }
1346                         SCTP_TCB_LOCK(stcb);
1347
1348                         if (stcb->rport != rport) {
1349                                 /* remote port does not match. */
1350                                 SCTP_TCB_UNLOCK(stcb);
1351                                 goto null_return;
1352                         }
1353                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1354                                 SCTP_TCB_UNLOCK(stcb);
1355                                 goto null_return;
1356                         }
1357                         if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1358                                 SCTP_TCB_UNLOCK(stcb);
1359                                 goto null_return;
1360                         }
1361                         /* now look at the list of remote addresses */
1362                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1363 #ifdef INVARIANTS
1364                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
1365                                         panic("Corrupt net list");
1366                                 }
1367 #endif
1368                                 if (net->ro._l_addr.sa.sa_family !=
1369                                     remote->sa_family) {
1370                                         /* not the same family */
1371                                         continue;
1372                                 }
1373                                 switch (remote->sa_family) {
1374 #ifdef INET
1375                                 case AF_INET:
1376                                         {
1377                                                 struct sockaddr_in *sin,
1378                                                            *rsin;
1379
1380                                                 sin = (struct sockaddr_in *)
1381                                                     &net->ro._l_addr;
1382                                                 rsin = (struct sockaddr_in *)remote;
1383                                                 if (sin->sin_addr.s_addr ==
1384                                                     rsin->sin_addr.s_addr) {
1385                                                         /* found it */
1386                                                         if (netp != NULL) {
1387                                                                 *netp = net;
1388                                                         }
1389                                                         if (locked_tcb == NULL) {
1390                                                                 SCTP_INP_DECR_REF(inp);
1391                                                         } else if (locked_tcb != stcb) {
1392                                                                 SCTP_TCB_LOCK(locked_tcb);
1393                                                         }
1394                                                         if (locked_tcb) {
1395                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1396                                                         }
1397
1398                                                         SCTP_INP_WUNLOCK(inp);
1399                                                         SCTP_INP_INFO_RUNLOCK();
1400                                                         return (stcb);
1401                                                 }
1402                                                 break;
1403                                         }
1404 #endif
1405 #ifdef INET6
1406                                 case AF_INET6:
1407                                         {
1408                                                 struct sockaddr_in6 *sin6,
1409                                                             *rsin6;
1410
1411                                                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1412                                                 rsin6 = (struct sockaddr_in6 *)remote;
1413                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1414                                                     rsin6)) {
1415                                                         /* found it */
1416                                                         if (netp != NULL) {
1417                                                                 *netp = net;
1418                                                         }
1419                                                         if (locked_tcb == NULL) {
1420                                                                 SCTP_INP_DECR_REF(inp);
1421                                                         } else if (locked_tcb != stcb) {
1422                                                                 SCTP_TCB_LOCK(locked_tcb);
1423                                                         }
1424                                                         if (locked_tcb) {
1425                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1426                                                         }
1427                                                         SCTP_INP_WUNLOCK(inp);
1428                                                         SCTP_INP_INFO_RUNLOCK();
1429                                                         return (stcb);
1430                                                 }
1431                                                 break;
1432                                         }
1433 #endif
1434                                 default:
1435                                         /* TSNH */
1436                                         break;
1437                                 }
1438                         }
1439                         SCTP_TCB_UNLOCK(stcb);
1440                 }
1441         } else {
1442                 SCTP_INP_WLOCK(inp);
1443                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1444                         goto null_return;
1445                 }
1446                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport,
1447                     inp->sctp_hashmark)];
1448                 LIST_FOREACH(stcb, head, sctp_tcbhash) {
1449                         if (stcb->rport != rport) {
1450                                 /* remote port does not match */
1451                                 continue;
1452                         }
1453                         SCTP_TCB_LOCK(stcb);
1454                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1455                                 SCTP_TCB_UNLOCK(stcb);
1456                                 continue;
1457                         }
1458                         if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1459                                 SCTP_TCB_UNLOCK(stcb);
1460                                 continue;
1461                         }
1462                         /* now look at the list of remote addresses */
1463                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1464 #ifdef INVARIANTS
1465                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
1466                                         panic("Corrupt net list");
1467                                 }
1468 #endif
1469                                 if (net->ro._l_addr.sa.sa_family !=
1470                                     remote->sa_family) {
1471                                         /* not the same family */
1472                                         continue;
1473                                 }
1474                                 switch (remote->sa_family) {
1475 #ifdef INET
1476                                 case AF_INET:
1477                                         {
1478                                                 struct sockaddr_in *sin,
1479                                                            *rsin;
1480
1481                                                 sin = (struct sockaddr_in *)
1482                                                     &net->ro._l_addr;
1483                                                 rsin = (struct sockaddr_in *)remote;
1484                                                 if (sin->sin_addr.s_addr ==
1485                                                     rsin->sin_addr.s_addr) {
1486                                                         /* found it */
1487                                                         if (netp != NULL) {
1488                                                                 *netp = net;
1489                                                         }
1490                                                         if (locked_tcb == NULL) {
1491                                                                 SCTP_INP_DECR_REF(inp);
1492                                                         } else if (locked_tcb != stcb) {
1493                                                                 SCTP_TCB_LOCK(locked_tcb);
1494                                                         }
1495                                                         if (locked_tcb) {
1496                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1497                                                         }
1498                                                         SCTP_INP_WUNLOCK(inp);
1499                                                         SCTP_INP_INFO_RUNLOCK();
1500                                                         return (stcb);
1501                                                 }
1502                                                 break;
1503                                         }
1504 #endif
1505 #ifdef INET6
1506                                 case AF_INET6:
1507                                         {
1508                                                 struct sockaddr_in6 *sin6,
1509                                                             *rsin6;
1510
1511                                                 sin6 = (struct sockaddr_in6 *)
1512                                                     &net->ro._l_addr;
1513                                                 rsin6 = (struct sockaddr_in6 *)remote;
1514                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1515                                                     rsin6)) {
1516                                                         /* found it */
1517                                                         if (netp != NULL) {
1518                                                                 *netp = net;
1519                                                         }
1520                                                         if (locked_tcb == NULL) {
1521                                                                 SCTP_INP_DECR_REF(inp);
1522                                                         } else if (locked_tcb != stcb) {
1523                                                                 SCTP_TCB_LOCK(locked_tcb);
1524                                                         }
1525                                                         if (locked_tcb) {
1526                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1527                                                         }
1528                                                         SCTP_INP_WUNLOCK(inp);
1529                                                         SCTP_INP_INFO_RUNLOCK();
1530                                                         return (stcb);
1531                                                 }
1532                                                 break;
1533                                         }
1534 #endif
1535                                 default:
1536                                         /* TSNH */
1537                                         break;
1538                                 }
1539                         }
1540                         SCTP_TCB_UNLOCK(stcb);
1541                 }
1542         }
1543 null_return:
1544         /* clean up for returning null */
1545         if (locked_tcb) {
1546                 SCTP_TCB_LOCK(locked_tcb);
1547                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1548         }
1549         SCTP_INP_WUNLOCK(inp);
1550         SCTP_INP_INFO_RUNLOCK();
1551         /* not found */
1552         return (NULL);
1553 }
1554
1555
1556 /*
1557  * Find an association for a specific endpoint using the association id given
1558  * out in the COMM_UP notification
1559  */
1560 struct sctp_tcb *
1561 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1562 {
1563         /*
1564          * Use my the assoc_id to find a endpoint
1565          */
1566         struct sctpasochead *head;
1567         struct sctp_tcb *stcb;
1568         uint32_t id;
1569
1570         if (inp == NULL) {
1571                 SCTP_PRINTF("TSNH ep_associd\n");
1572                 return (NULL);
1573         }
1574         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1575                 SCTP_PRINTF("TSNH ep_associd0\n");
1576                 return (NULL);
1577         }
1578         id = (uint32_t)asoc_id;
1579         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
1580         if (head == NULL) {
1581                 /* invalid id TSNH */
1582                 SCTP_PRINTF("TSNH ep_associd1\n");
1583                 return (NULL);
1584         }
1585         LIST_FOREACH(stcb, head, sctp_tcbasocidhash) {
1586                 if (stcb->asoc.assoc_id == id) {
1587                         if (inp != stcb->sctp_ep) {
1588                                 /*
1589                                  * some other guy has the same id active (id
1590                                  * collision ??).
1591                                  */
1592                                 SCTP_PRINTF("TSNH ep_associd2\n");
1593                                 continue;
1594                         }
1595                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1596                                 continue;
1597                         }
1598                         if (want_lock) {
1599                                 SCTP_TCB_LOCK(stcb);
1600                         }
1601                         return (stcb);
1602                 }
1603         }
1604         return (NULL);
1605 }
1606
1607
1608 struct sctp_tcb *
1609 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1610 {
1611         struct sctp_tcb *stcb;
1612
1613         SCTP_INP_RLOCK(inp);
1614         stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock);
1615         SCTP_INP_RUNLOCK(inp);
1616         return (stcb);
1617 }
1618
1619
1620 /*
1621  * Endpoint probe expects that the INP_INFO is locked.
1622  */
1623 static struct sctp_inpcb *
1624 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head,
1625     uint16_t lport, uint32_t vrf_id)
1626 {
1627         struct sctp_inpcb *inp;
1628         struct sctp_laddr *laddr;
1629 #ifdef INET
1630         struct sockaddr_in *sin;
1631 #endif
1632 #ifdef INET6
1633         struct sockaddr_in6 *sin6;
1634         struct sockaddr_in6 *intf_addr6;
1635 #endif
1636         int fnd;
1637
1638 #ifdef INET
1639         sin = NULL;
1640 #endif
1641 #ifdef INET6
1642         sin6 = NULL;
1643 #endif
1644         switch (nam->sa_family) {
1645 #ifdef INET
1646         case AF_INET:
1647                 sin = (struct sockaddr_in *)nam;
1648                 break;
1649 #endif
1650 #ifdef INET6
1651         case AF_INET6:
1652                 sin6 = (struct sockaddr_in6 *)nam;
1653                 break;
1654 #endif
1655         default:
1656                 /* unsupported family */
1657                 return (NULL);
1658         }
1659
1660         if (head == NULL)
1661                 return (NULL);
1662
1663         LIST_FOREACH(inp, head, sctp_hash) {
1664                 SCTP_INP_RLOCK(inp);
1665                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1666                         SCTP_INP_RUNLOCK(inp);
1667                         continue;
1668                 }
1669                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) &&
1670                     (inp->sctp_lport == lport)) {
1671                         /* got it */
1672                         switch (nam->sa_family) {
1673 #ifdef INET
1674                         case AF_INET:
1675                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1676                                     SCTP_IPV6_V6ONLY(inp)) {
1677                                         /*
1678                                          * IPv4 on a IPv6 socket with ONLY
1679                                          * IPv6 set
1680                                          */
1681                                         SCTP_INP_RUNLOCK(inp);
1682                                         continue;
1683                                 }
1684                                 if (prison_check_ip4(inp->ip_inp.inp.inp_cred,
1685                                     &sin->sin_addr) != 0) {
1686                                         SCTP_INP_RUNLOCK(inp);
1687                                         continue;
1688                                 }
1689                                 break;
1690 #endif
1691 #ifdef INET6
1692                         case AF_INET6:
1693                                 /*
1694                                  * A V6 address and the endpoint is NOT
1695                                  * bound V6
1696                                  */
1697                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
1698                                         SCTP_INP_RUNLOCK(inp);
1699                                         continue;
1700                                 }
1701                                 if (prison_check_ip6(inp->ip_inp.inp.inp_cred,
1702                                     &sin6->sin6_addr) != 0) {
1703                                         SCTP_INP_RUNLOCK(inp);
1704                                         continue;
1705                                 }
1706                                 break;
1707 #endif
1708                         default:
1709                                 break;
1710                         }
1711                         /* does a VRF id match? */
1712                         fnd = 0;
1713                         if (inp->def_vrf_id == vrf_id)
1714                                 fnd = 1;
1715
1716                         SCTP_INP_RUNLOCK(inp);
1717                         if (!fnd)
1718                                 continue;
1719                         return (inp);
1720                 }
1721                 SCTP_INP_RUNLOCK(inp);
1722         }
1723         switch (nam->sa_family) {
1724 #ifdef INET
1725         case AF_INET:
1726                 if (sin->sin_addr.s_addr == INADDR_ANY) {
1727                         /* Can't hunt for one that has no address specified */
1728                         return (NULL);
1729                 }
1730                 break;
1731 #endif
1732 #ifdef INET6
1733         case AF_INET6:
1734                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
1735                         /* Can't hunt for one that has no address specified */
1736                         return (NULL);
1737                 }
1738                 break;
1739 #endif
1740         default:
1741                 break;
1742         }
1743         /*
1744          * ok, not bound to all so see if we can find a EP bound to this
1745          * address.
1746          */
1747         LIST_FOREACH(inp, head, sctp_hash) {
1748                 SCTP_INP_RLOCK(inp);
1749                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1750                         SCTP_INP_RUNLOCK(inp);
1751                         continue;
1752                 }
1753                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) {
1754                         SCTP_INP_RUNLOCK(inp);
1755                         continue;
1756                 }
1757                 /*
1758                  * Ok this could be a likely candidate, look at all of its
1759                  * addresses
1760                  */
1761                 if (inp->sctp_lport != lport) {
1762                         SCTP_INP_RUNLOCK(inp);
1763                         continue;
1764                 }
1765                 /* does a VRF id match? */
1766                 fnd = 0;
1767                 if (inp->def_vrf_id == vrf_id)
1768                         fnd = 1;
1769
1770                 if (!fnd) {
1771                         SCTP_INP_RUNLOCK(inp);
1772                         continue;
1773                 }
1774                 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1775                         if (laddr->ifa == NULL) {
1776                                 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
1777                                     __func__);
1778                                 continue;
1779                         }
1780                         SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ",
1781                             (void *)laddr->ifa);
1782                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1783                                 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n");
1784                                 continue;
1785                         }
1786                         if (laddr->ifa->address.sa.sa_family == nam->sa_family) {
1787                                 /* possible, see if it matches */
1788                                 switch (nam->sa_family) {
1789 #ifdef INET
1790                                 case AF_INET:
1791                                         if (sin->sin_addr.s_addr ==
1792                                             laddr->ifa->address.sin.sin_addr.s_addr) {
1793                                                 SCTP_INP_RUNLOCK(inp);
1794                                                 return (inp);
1795                                         }
1796                                         break;
1797 #endif
1798 #ifdef INET6
1799                                 case AF_INET6:
1800                                         intf_addr6 = &laddr->ifa->address.sin6;
1801                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
1802                                             intf_addr6)) {
1803                                                 SCTP_INP_RUNLOCK(inp);
1804                                                 return (inp);
1805                                         }
1806                                         break;
1807 #endif
1808                                 }
1809                         }
1810                 }
1811                 SCTP_INP_RUNLOCK(inp);
1812         }
1813         return (NULL);
1814 }
1815
1816
1817 static struct sctp_inpcb *
1818 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id)
1819 {
1820         struct sctppcbhead *head;
1821         struct sctp_inpcb *t_inp;
1822         int fnd;
1823
1824         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1825             SCTP_BASE_INFO(hashmark))];
1826         LIST_FOREACH(t_inp, head, sctp_hash) {
1827                 if (t_inp->sctp_lport != lport) {
1828                         continue;
1829                 }
1830                 /* is it in the VRF in question */
1831                 fnd = 0;
1832                 if (t_inp->def_vrf_id == vrf_id)
1833                         fnd = 1;
1834                 if (!fnd)
1835                         continue;
1836
1837                 /* This one is in use. */
1838                 /* check the v6/v4 binding issue */
1839                 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1840                     SCTP_IPV6_V6ONLY(t_inp)) {
1841                         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1842                                 /* collision in V6 space */
1843                                 return (t_inp);
1844                         } else {
1845                                 /* inp is BOUND_V4 no conflict */
1846                                 continue;
1847                         }
1848                 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1849                         /* t_inp is bound v4 and v6, conflict always */
1850                         return (t_inp);
1851                 } else {
1852                         /* t_inp is bound only V4 */
1853                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1854                             SCTP_IPV6_V6ONLY(inp)) {
1855                                 /* no conflict */
1856                                 continue;
1857                         }
1858                         /* else fall through to conflict */
1859                 }
1860                 return (t_inp);
1861         }
1862         return (NULL);
1863 }
1864
1865
1866 int
1867 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp)
1868 {
1869         /* For 1-2-1 with port reuse */
1870         struct sctppcbhead *head;
1871         struct sctp_inpcb *tinp, *ninp;
1872
1873         if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) {
1874                 /* only works with port reuse on */
1875                 return (-1);
1876         }
1877         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) {
1878                 return (0);
1879         }
1880         SCTP_INP_RUNLOCK(inp);
1881         SCTP_INP_INFO_WLOCK();
1882         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport,
1883             SCTP_BASE_INFO(hashmark))];
1884         /* Kick out all non-listeners to the TCP hash */
1885         LIST_FOREACH_SAFE(tinp, head, sctp_hash, ninp) {
1886                 if (tinp->sctp_lport != inp->sctp_lport) {
1887                         continue;
1888                 }
1889                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1890                         continue;
1891                 }
1892                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
1893                         continue;
1894                 }
1895                 if (SCTP_IS_LISTENING(tinp)) {
1896                         continue;
1897                 }
1898                 SCTP_INP_WLOCK(tinp);
1899                 LIST_REMOVE(tinp, sctp_hash);
1900                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))];
1901                 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
1902                 LIST_INSERT_HEAD(head, tinp, sctp_hash);
1903                 SCTP_INP_WUNLOCK(tinp);
1904         }
1905         SCTP_INP_WLOCK(inp);
1906         /* Pull from where he was */
1907         LIST_REMOVE(inp, sctp_hash);
1908         inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL;
1909         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))];
1910         LIST_INSERT_HEAD(head, inp, sctp_hash);
1911         SCTP_INP_WUNLOCK(inp);
1912         SCTP_INP_RLOCK(inp);
1913         SCTP_INP_INFO_WUNLOCK();
1914         return (0);
1915 }
1916
1917
1918 struct sctp_inpcb *
1919 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock,
1920     uint32_t vrf_id)
1921 {
1922         /*
1923          * First we check the hash table to see if someone has this port
1924          * bound with just the port.
1925          */
1926         struct sctp_inpcb *inp;
1927         struct sctppcbhead *head;
1928         int lport;
1929         unsigned int i;
1930 #ifdef INET
1931         struct sockaddr_in *sin;
1932 #endif
1933 #ifdef INET6
1934         struct sockaddr_in6 *sin6;
1935 #endif
1936
1937         switch (nam->sa_family) {
1938 #ifdef INET
1939         case AF_INET:
1940                 sin = (struct sockaddr_in *)nam;
1941                 lport = sin->sin_port;
1942                 break;
1943 #endif
1944 #ifdef INET6
1945         case AF_INET6:
1946                 sin6 = (struct sockaddr_in6 *)nam;
1947                 lport = sin6->sin6_port;
1948                 break;
1949 #endif
1950         default:
1951                 return (NULL);
1952         }
1953         /*
1954          * I could cheat here and just cast to one of the types but we will
1955          * do it right. It also provides the check against an Unsupported
1956          * type too.
1957          */
1958         /* Find the head of the ALLADDR chain */
1959         if (have_lock == 0) {
1960                 SCTP_INP_INFO_RLOCK();
1961         }
1962         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1963             SCTP_BASE_INFO(hashmark))];
1964         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1965
1966         /*
1967          * If the TCP model exists it could be that the main listening
1968          * endpoint is gone but there still exists a connected socket for
1969          * this guy. If so we can return the first one that we find. This
1970          * may NOT be the correct one so the caller should be wary on the
1971          * returned INP. Currently the only caller that sets find_tcp_pool
1972          * is in bindx where we are verifying that a user CAN bind the
1973          * address. He either has bound it already, or someone else has, or
1974          * its open to bind, so this is good enough.
1975          */
1976         if (inp == NULL && find_tcp_pool) {
1977                 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) {
1978                         head = &SCTP_BASE_INFO(sctp_tcpephash)[i];
1979                         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1980                         if (inp) {
1981                                 break;
1982                         }
1983                 }
1984         }
1985         if (inp) {
1986                 SCTP_INP_INCR_REF(inp);
1987         }
1988         if (have_lock == 0) {
1989                 SCTP_INP_INFO_RUNLOCK();
1990         }
1991         return (inp);
1992 }
1993
1994
1995 /*
1996  * Find an association for an endpoint with the pointer to whom you want to
1997  * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may
1998  * need to change the *to to some other struct like a mbuf...
1999  */
2000 struct sctp_tcb *
2001 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to,
2002     struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool,
2003     uint32_t vrf_id)
2004 {
2005         struct sctp_inpcb *inp = NULL;
2006         struct sctp_tcb *stcb;
2007
2008         SCTP_INP_INFO_RLOCK();
2009         if (find_tcp_pool) {
2010                 if (inp_p != NULL) {
2011                         stcb = sctp_tcb_special_locate(inp_p, from, to, netp,
2012                             vrf_id);
2013                 } else {
2014                         stcb = sctp_tcb_special_locate(&inp, from, to, netp,
2015                             vrf_id);
2016                 }
2017                 if (stcb != NULL) {
2018                         SCTP_INP_INFO_RUNLOCK();
2019                         return (stcb);
2020                 }
2021         }
2022         inp = sctp_pcb_findep(to, 0, 1, vrf_id);
2023         if (inp_p != NULL) {
2024                 *inp_p = inp;
2025         }
2026         SCTP_INP_INFO_RUNLOCK();
2027         if (inp == NULL) {
2028                 return (NULL);
2029         }
2030         /*
2031          * ok, we have an endpoint, now lets find the assoc for it (if any)
2032          * we now place the source address or from in the to of the find
2033          * endpoint call. Since in reality this chain is used from the
2034          * inbound packet side.
2035          */
2036         if (inp_p != NULL) {
2037                 stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to,
2038                     NULL);
2039         } else {
2040                 stcb = sctp_findassociation_ep_addr(&inp, from, netp, to,
2041                     NULL);
2042         }
2043         return (stcb);
2044 }
2045
2046
2047 /*
2048  * This routine will grub through the mbuf that is a INIT or INIT-ACK and
2049  * find all addresses that the sender has specified in any address list. Each
2050  * address will be used to lookup the TCB and see if one exits.
2051  */
2052 static struct sctp_tcb *
2053 sctp_findassociation_special_addr(struct mbuf *m, int offset,
2054     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp,
2055     struct sockaddr *dst)
2056 {
2057         struct sctp_paramhdr *phdr, param_buf;
2058 #if defined(INET) || defined(INET6)
2059         struct sctp_tcb *stcb;
2060         uint16_t ptype;
2061 #endif
2062         uint16_t plen;
2063 #ifdef INET
2064         struct sockaddr_in sin4;
2065 #endif
2066 #ifdef INET6
2067         struct sockaddr_in6 sin6;
2068 #endif
2069
2070 #ifdef INET
2071         memset(&sin4, 0, sizeof(sin4));
2072         sin4.sin_len = sizeof(sin4);
2073         sin4.sin_family = AF_INET;
2074         sin4.sin_port = sh->src_port;
2075 #endif
2076 #ifdef INET6
2077         memset(&sin6, 0, sizeof(sin6));
2078         sin6.sin6_len = sizeof(sin6);
2079         sin6.sin6_family = AF_INET6;
2080         sin6.sin6_port = sh->src_port;
2081 #endif
2082
2083         offset += sizeof(struct sctp_init_chunk);
2084
2085         phdr = sctp_get_next_param(m, offset, &param_buf, sizeof(param_buf));
2086         while (phdr != NULL) {
2087                 /* now we must see if we want the parameter */
2088 #if defined(INET) || defined(INET6)
2089                 ptype = ntohs(phdr->param_type);
2090 #endif
2091                 plen = ntohs(phdr->param_length);
2092                 if (plen == 0) {
2093                         break;
2094                 }
2095 #ifdef INET
2096                 if (ptype == SCTP_IPV4_ADDRESS &&
2097                     plen == sizeof(struct sctp_ipv4addr_param)) {
2098                         /* Get the rest of the address */
2099                         struct sctp_ipv4addr_param ip4_param, *p4;
2100
2101                         phdr = sctp_get_next_param(m, offset,
2102                             (struct sctp_paramhdr *)&ip4_param, sizeof(ip4_param));
2103                         if (phdr == NULL) {
2104                                 return (NULL);
2105                         }
2106                         p4 = (struct sctp_ipv4addr_param *)phdr;
2107                         memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr));
2108                         /* look it up */
2109                         stcb = sctp_findassociation_ep_addr(inp_p,
2110                             (struct sockaddr *)&sin4, netp, dst, NULL);
2111                         if (stcb != NULL) {
2112                                 return (stcb);
2113                         }
2114                 }
2115 #endif
2116 #ifdef INET6
2117                 if (ptype == SCTP_IPV6_ADDRESS &&
2118                     plen == sizeof(struct sctp_ipv6addr_param)) {
2119                         /* Get the rest of the address */
2120                         struct sctp_ipv6addr_param ip6_param, *p6;
2121
2122                         phdr = sctp_get_next_param(m, offset,
2123                             (struct sctp_paramhdr *)&ip6_param, sizeof(ip6_param));
2124                         if (phdr == NULL) {
2125                                 return (NULL);
2126                         }
2127                         p6 = (struct sctp_ipv6addr_param *)phdr;
2128                         memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr));
2129                         /* look it up */
2130                         stcb = sctp_findassociation_ep_addr(inp_p,
2131                             (struct sockaddr *)&sin6, netp, dst, NULL);
2132                         if (stcb != NULL) {
2133                                 return (stcb);
2134                         }
2135                 }
2136 #endif
2137                 offset += SCTP_SIZE32(plen);
2138                 phdr = sctp_get_next_param(m, offset, &param_buf,
2139                     sizeof(param_buf));
2140         }
2141         return (NULL);
2142 }
2143
2144 static struct sctp_tcb *
2145 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag,
2146     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport,
2147     uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag)
2148 {
2149         /*
2150          * Use my vtag to hash. If we find it we then verify the source addr
2151          * is in the assoc. If all goes well we save a bit on rec of a
2152          * packet.
2153          */
2154         struct sctpasochead *head;
2155         struct sctp_nets *net;
2156         struct sctp_tcb *stcb;
2157
2158         SCTP_INP_INFO_RLOCK();
2159         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag,
2160             SCTP_BASE_INFO(hashasocmark))];
2161         LIST_FOREACH(stcb, head, sctp_asocs) {
2162                 SCTP_INP_RLOCK(stcb->sctp_ep);
2163                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
2164                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
2165                         continue;
2166                 }
2167                 if (stcb->sctp_ep->def_vrf_id != vrf_id) {
2168                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
2169                         continue;
2170                 }
2171                 SCTP_TCB_LOCK(stcb);
2172                 SCTP_INP_RUNLOCK(stcb->sctp_ep);
2173                 if (stcb->asoc.my_vtag == vtag) {
2174                         /* candidate */
2175                         if (stcb->rport != rport) {
2176                                 SCTP_TCB_UNLOCK(stcb);
2177                                 continue;
2178                         }
2179                         if (stcb->sctp_ep->sctp_lport != lport) {
2180                                 SCTP_TCB_UNLOCK(stcb);
2181                                 continue;
2182                         }
2183                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
2184                                 SCTP_TCB_UNLOCK(stcb);
2185                                 continue;
2186                         }
2187                         /* RRS:Need toaddr check here */
2188                         if (sctp_does_stcb_own_this_addr(stcb, to) == 0) {
2189                                 /* Endpoint does not own this address */
2190                                 SCTP_TCB_UNLOCK(stcb);
2191                                 continue;
2192                         }
2193                         if (remote_tag) {
2194                                 /*
2195                                  * If we have both vtags that's all we match
2196                                  * on
2197                                  */
2198                                 if (stcb->asoc.peer_vtag == remote_tag) {
2199                                         /*
2200                                          * If both tags match we consider it
2201                                          * conclusive and check NO
2202                                          * source/destination addresses
2203                                          */
2204                                         goto conclusive;
2205                                 }
2206                         }
2207                         if (skip_src_check) {
2208                 conclusive:
2209                                 if (from) {
2210                                         *netp = sctp_findnet(stcb, from);
2211                                 } else {
2212                                         *netp = NULL;   /* unknown */
2213                                 }
2214                                 if (inp_p)
2215                                         *inp_p = stcb->sctp_ep;
2216                                 SCTP_INP_INFO_RUNLOCK();
2217                                 return (stcb);
2218                         }
2219                         net = sctp_findnet(stcb, from);
2220                         if (net) {
2221                                 /* yep its him. */
2222                                 *netp = net;
2223                                 SCTP_STAT_INCR(sctps_vtagexpress);
2224                                 *inp_p = stcb->sctp_ep;
2225                                 SCTP_INP_INFO_RUNLOCK();
2226                                 return (stcb);
2227                         } else {
2228                                 /*
2229                                  * not him, this should only happen in rare
2230                                  * cases so I peg it.
2231                                  */
2232                                 SCTP_STAT_INCR(sctps_vtagbogus);
2233                         }
2234                 }
2235                 SCTP_TCB_UNLOCK(stcb);
2236         }
2237         SCTP_INP_INFO_RUNLOCK();
2238         return (NULL);
2239 }
2240
2241
2242 /*
2243  * Find an association with the pointer to the inbound IP packet. This can be
2244  * a IPv4 or IPv6 packet.
2245  */
2246 struct sctp_tcb *
2247 sctp_findassociation_addr(struct mbuf *m, int offset,
2248     struct sockaddr *src, struct sockaddr *dst,
2249     struct sctphdr *sh, struct sctp_chunkhdr *ch,
2250     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2251 {
2252         struct sctp_tcb *stcb;
2253         struct sctp_inpcb *inp;
2254
2255         if (sh->v_tag) {
2256                 /* we only go down this path if vtag is non-zero */
2257                 stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag),
2258                     inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0);
2259                 if (stcb) {
2260                         return (stcb);
2261                 }
2262         }
2263
2264         if (inp_p) {
2265                 stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp,
2266                     1, vrf_id);
2267                 inp = *inp_p;
2268         } else {
2269                 stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp,
2270                     1, vrf_id);
2271         }
2272         SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp);
2273         if (stcb == NULL && inp) {
2274                 /* Found a EP but not this address */
2275                 if ((ch->chunk_type == SCTP_INITIATION) ||
2276                     (ch->chunk_type == SCTP_INITIATION_ACK)) {
2277                         /*-
2278                          * special hook, we do NOT return linp or an
2279                          * association that is linked to an existing
2280                          * association that is under the TCP pool (i.e. no
2281                          * listener exists). The endpoint finding routine
2282                          * will always find a listener before examining the
2283                          * TCP pool.
2284                          */
2285                         if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
2286                                 if (inp_p) {
2287                                         *inp_p = NULL;
2288                                 }
2289                                 return (NULL);
2290                         }
2291                         stcb = sctp_findassociation_special_addr(m,
2292                             offset, sh, &inp, netp, dst);
2293                         if (inp_p != NULL) {
2294                                 *inp_p = inp;
2295                         }
2296                 }
2297         }
2298         SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb);
2299         return (stcb);
2300 }
2301
2302 /*
2303  * lookup an association by an ASCONF lookup address.
2304  * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup
2305  */
2306 struct sctp_tcb *
2307 sctp_findassociation_ep_asconf(struct mbuf *m, int offset,
2308     struct sockaddr *dst, struct sctphdr *sh,
2309     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2310 {
2311         struct sctp_tcb *stcb;
2312         union sctp_sockstore remote_store;
2313         struct sctp_paramhdr param_buf, *phdr;
2314         int ptype;
2315         int zero_address = 0;
2316 #ifdef INET
2317         struct sockaddr_in *sin;
2318 #endif
2319 #ifdef INET6
2320         struct sockaddr_in6 *sin6;
2321 #endif
2322
2323         memset(&remote_store, 0, sizeof(remote_store));
2324         phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk),
2325             &param_buf, sizeof(struct sctp_paramhdr));
2326         if (phdr == NULL) {
2327                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n",
2328                     __func__);
2329                 return NULL;
2330         }
2331         ptype = (int)((uint32_t)ntohs(phdr->param_type));
2332         /* get the correlation address */
2333         switch (ptype) {
2334 #ifdef INET6
2335         case SCTP_IPV6_ADDRESS:
2336                 {
2337                         /* ipv6 address param */
2338                         struct sctp_ipv6addr_param *p6, p6_buf;
2339
2340                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) {
2341                                 return NULL;
2342                         }
2343                         p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m,
2344                             offset + sizeof(struct sctp_asconf_chunk),
2345                             &p6_buf.ph, sizeof(p6_buf));
2346                         if (p6 == NULL) {
2347                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n",
2348                                     __func__);
2349                                 return (NULL);
2350                         }
2351                         sin6 = &remote_store.sin6;
2352                         sin6->sin6_family = AF_INET6;
2353                         sin6->sin6_len = sizeof(*sin6);
2354                         sin6->sin6_port = sh->src_port;
2355                         memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr));
2356                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
2357                                 zero_address = 1;
2358                         break;
2359                 }
2360 #endif
2361 #ifdef INET
2362         case SCTP_IPV4_ADDRESS:
2363                 {
2364                         /* ipv4 address param */
2365                         struct sctp_ipv4addr_param *p4, p4_buf;
2366
2367                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) {
2368                                 return NULL;
2369                         }
2370                         p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m,
2371                             offset + sizeof(struct sctp_asconf_chunk),
2372                             &p4_buf.ph, sizeof(p4_buf));
2373                         if (p4 == NULL) {
2374                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n",
2375                                     __func__);
2376                                 return (NULL);
2377                         }
2378                         sin = &remote_store.sin;
2379                         sin->sin_family = AF_INET;
2380                         sin->sin_len = sizeof(*sin);
2381                         sin->sin_port = sh->src_port;
2382                         memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr));
2383                         if (sin->sin_addr.s_addr == INADDR_ANY)
2384                                 zero_address = 1;
2385                         break;
2386                 }
2387 #endif
2388         default:
2389                 /* invalid address param type */
2390                 return NULL;
2391         }
2392
2393         if (zero_address) {
2394                 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p,
2395                     netp, sh->src_port, sh->dest_port, 1, vrf_id, 0);
2396                 if (stcb != NULL) {
2397                         SCTP_INP_DECR_REF(*inp_p);
2398                 }
2399         } else {
2400                 stcb = sctp_findassociation_ep_addr(inp_p,
2401                     &remote_store.sa, netp,
2402                     dst, NULL);
2403         }
2404         return (stcb);
2405 }
2406
2407
2408 /*
2409  * allocate a sctp_inpcb and setup a temporary binding to a port/all
2410  * addresses. This way if we don't get a bind we by default pick a ephemeral
2411  * port with all addresses bound.
2412  */
2413 int
2414 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id)
2415 {
2416         /*
2417          * we get called when a new endpoint starts up. We need to allocate
2418          * the sctp_inpcb structure from the zone and init it. Mark it as
2419          * unbound and find a port that we can use as an ephemeral with
2420          * INADDR_ANY. If the user binds later no problem we can then add in
2421          * the specific addresses. And setup the default parameters for the
2422          * EP.
2423          */
2424         int i, error;
2425         struct sctp_inpcb *inp;
2426         struct sctp_pcb *m;
2427         struct timeval time;
2428         sctp_sharedkey_t *null_key;
2429
2430         error = 0;
2431
2432         SCTP_INP_INFO_WLOCK();
2433         inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb);
2434         if (inp == NULL) {
2435                 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n");
2436                 SCTP_INP_INFO_WUNLOCK();
2437                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2438                 return (ENOBUFS);
2439         }
2440         /* zap it */
2441         memset(inp, 0, sizeof(*inp));
2442
2443         /* bump generations */
2444         /* setup socket pointers */
2445         inp->sctp_socket = so;
2446         inp->ip_inp.inp.inp_socket = so;
2447         inp->ip_inp.inp.inp_cred = crhold(so->so_cred);
2448 #ifdef INET6
2449         if (INP_SOCKAF(so) == AF_INET6) {
2450                 if (MODULE_GLOBAL(ip6_auto_flowlabel)) {
2451                         inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL;
2452                 }
2453                 if (MODULE_GLOBAL(ip6_v6only)) {
2454                         inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY;
2455                 }
2456         }
2457 #endif
2458         inp->sctp_associd_counter = 1;
2459         inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT;
2460         inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT;
2461         inp->max_cwnd = 0;
2462         inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off);
2463         inp->ecn_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_ecn_enable);
2464         inp->prsctp_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pr_enable);
2465         inp->auth_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_auth_enable);
2466         inp->asconf_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_asconf_enable);
2467         inp->reconfig_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_reconfig_enable);
2468         inp->nrsack_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_nrsack_enable);
2469         inp->pktdrop_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pktdrop_enable);
2470         inp->idata_supported = 0;
2471
2472         inp->fibnum = so->so_fibnum;
2473         /* init the small hash table we use to track asocid <-> tcb */
2474         inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark);
2475         if (inp->sctp_asocidhash == NULL) {
2476                 crfree(inp->ip_inp.inp.inp_cred);
2477                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2478                 SCTP_INP_INFO_WUNLOCK();
2479                 return (ENOBUFS);
2480         }
2481         SCTP_INCR_EP_COUNT();
2482         inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl);
2483         SCTP_INP_INFO_WUNLOCK();
2484
2485         so->so_pcb = (caddr_t)inp;
2486
2487         if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) {
2488                 /* UDP style socket */
2489                 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
2490                     SCTP_PCB_FLAGS_UNBOUND);
2491                 /* Be sure it is NON-BLOCKING IO for UDP */
2492                 /* SCTP_SET_SO_NBIO(so); */
2493         } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) {
2494                 /* TCP style socket */
2495                 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2496                     SCTP_PCB_FLAGS_UNBOUND);
2497                 /* Be sure we have blocking IO by default */
2498                 SOCK_LOCK(so);
2499                 SCTP_CLEAR_SO_NBIO(so);
2500                 SOCK_UNLOCK(so);
2501         } else {
2502                 /*
2503                  * unsupported socket type (RAW, etc)- in case we missed it
2504                  * in protosw
2505                  */
2506                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP);
2507                 so->so_pcb = NULL;
2508                 crfree(inp->ip_inp.inp.inp_cred);
2509                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2510                 return (EOPNOTSUPP);
2511         }
2512         if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) {
2513                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2514                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2515         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) {
2516                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2517                 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2518         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) {
2519                 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2520                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2521         }
2522         inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize),
2523             &inp->sctp_hashmark);
2524         if (inp->sctp_tcbhash == NULL) {
2525                 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n");
2526                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2527                 so->so_pcb = NULL;
2528                 crfree(inp->ip_inp.inp.inp_cred);
2529                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2530                 return (ENOBUFS);
2531         }
2532         inp->def_vrf_id = vrf_id;
2533
2534         SCTP_INP_INFO_WLOCK();
2535         SCTP_INP_LOCK_INIT(inp);
2536         INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp");
2537         SCTP_INP_READ_INIT(inp);
2538         SCTP_ASOC_CREATE_LOCK_INIT(inp);
2539         /* lock the new ep */
2540         SCTP_INP_WLOCK(inp);
2541
2542         /* add it to the info area */
2543         LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list);
2544         SCTP_INP_INFO_WUNLOCK();
2545
2546         TAILQ_INIT(&inp->read_queue);
2547         LIST_INIT(&inp->sctp_addr_list);
2548
2549         LIST_INIT(&inp->sctp_asoc_list);
2550
2551 #ifdef SCTP_TRACK_FREED_ASOCS
2552         /* TEMP CODE */
2553         LIST_INIT(&inp->sctp_asoc_free_list);
2554 #endif
2555         /* Init the timer structure for signature change */
2556         SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer);
2557         inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE;
2558
2559         /* now init the actual endpoint default data */
2560         m = &inp->sctp_ep;
2561
2562         /* setup the base timeout information */
2563         m->sctp_timeoutticks[SCTP_TIMER_SEND] = sctp_secs_to_ticks(SCTP_SEND_SEC);      /* needed ? */
2564         m->sctp_timeoutticks[SCTP_TIMER_INIT] = sctp_secs_to_ticks(SCTP_INIT_SEC);      /* needed ? */
2565         m->sctp_timeoutticks[SCTP_TIMER_RECV] = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default));
2566         m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default));
2567         m->sctp_timeoutticks[SCTP_TIMER_PMTU] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default));
2568         m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default));
2569         m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default));
2570         /* all max/min max are in ms */
2571         m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default);
2572         m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default);
2573         m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default);
2574         m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default);
2575         m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default);
2576         m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default);
2577         m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default);
2578         m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default);
2579         m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold);
2580         m->sctp_sws_sender = SCTP_SWS_SENDER_DEF;
2581         m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF;
2582         m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default);
2583         m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default);
2584
2585         m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module);
2586         m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module);
2587         m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default);
2588         /* number of streams to pre-open on a association */
2589         m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default);
2590
2591         m->default_mtu = 0;
2592         /* Add adaptation cookie */
2593         m->adaptation_layer_indicator = 0;
2594         m->adaptation_layer_indicator_provided = 0;
2595
2596         /* seed random number generator */
2597         m->random_counter = 1;
2598         m->store_at = SCTP_SIGNATURE_SIZE;
2599         SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers));
2600         sctp_fill_random_store(m);
2601
2602         /* Minimum cookie size */
2603         m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) +
2604             sizeof(struct sctp_state_cookie);
2605         m->size_of_a_cookie += SCTP_SIGNATURE_SIZE;
2606
2607         /* Setup the initial secret */
2608         (void)SCTP_GETTIME_TIMEVAL(&time);
2609         m->time_of_secret_change = time.tv_sec;
2610
2611         for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
2612                 m->secret_key[0][i] = sctp_select_initial_TSN(m);
2613         }
2614         sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
2615
2616         /* How long is a cookie good for ? */
2617         m->def_cookie_life = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default));
2618         /*
2619          * Initialize authentication parameters
2620          */
2621         m->local_hmacs = sctp_default_supported_hmaclist();
2622         m->local_auth_chunks = sctp_alloc_chunklist();
2623         if (inp->asconf_supported) {
2624                 sctp_auth_add_chunk(SCTP_ASCONF, m->local_auth_chunks);
2625                 sctp_auth_add_chunk(SCTP_ASCONF_ACK, m->local_auth_chunks);
2626         }
2627         m->default_dscp = 0;
2628 #ifdef INET6
2629         m->default_flowlabel = 0;
2630 #endif
2631         m->port = 0;            /* encapsulation disabled by default */
2632         LIST_INIT(&m->shared_keys);
2633         /* add default NULL key as key id 0 */
2634         null_key = sctp_alloc_sharedkey();
2635         sctp_insert_sharedkey(&m->shared_keys, null_key);
2636         SCTP_INP_WUNLOCK(inp);
2637 #ifdef SCTP_LOG_CLOSING
2638         sctp_log_closing(inp, NULL, 12);
2639 #endif
2640         return (error);
2641 }
2642
2643
2644 void
2645 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp,
2646     struct sctp_tcb *stcb)
2647 {
2648         struct sctp_nets *net;
2649         uint16_t lport, rport;
2650         struct sctppcbhead *head;
2651         struct sctp_laddr *laddr, *oladdr;
2652
2653         atomic_add_int(&stcb->asoc.refcnt, 1);
2654         SCTP_TCB_UNLOCK(stcb);
2655         SCTP_INP_INFO_WLOCK();
2656         SCTP_INP_WLOCK(old_inp);
2657         SCTP_INP_WLOCK(new_inp);
2658         SCTP_TCB_LOCK(stcb);
2659         atomic_subtract_int(&stcb->asoc.refcnt, 1);
2660
2661         new_inp->sctp_ep.time_of_secret_change =
2662             old_inp->sctp_ep.time_of_secret_change;
2663         memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key,
2664             sizeof(old_inp->sctp_ep.secret_key));
2665         new_inp->sctp_ep.current_secret_number =
2666             old_inp->sctp_ep.current_secret_number;
2667         new_inp->sctp_ep.last_secret_number =
2668             old_inp->sctp_ep.last_secret_number;
2669         new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie;
2670
2671         /* make it so new data pours into the new socket */
2672         stcb->sctp_socket = new_inp->sctp_socket;
2673         stcb->sctp_ep = new_inp;
2674
2675         /* Copy the port across */
2676         lport = new_inp->sctp_lport = old_inp->sctp_lport;
2677         rport = stcb->rport;
2678         /* Pull the tcb from the old association */
2679         LIST_REMOVE(stcb, sctp_tcbhash);
2680         LIST_REMOVE(stcb, sctp_tcblist);
2681         if (stcb->asoc.in_asocid_hash) {
2682                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
2683         }
2684         /* Now insert the new_inp into the TCP connected hash */
2685         head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
2686
2687         LIST_INSERT_HEAD(head, new_inp, sctp_hash);
2688         /* Its safe to access */
2689         new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
2690
2691         /* Now move the tcb into the endpoint list */
2692         LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist);
2693         /*
2694          * Question, do we even need to worry about the ep-hash since we
2695          * only have one connection? Probably not :> so lets get rid of it
2696          * and not suck up any kernel memory in that.
2697          */
2698         if (stcb->asoc.in_asocid_hash) {
2699                 struct sctpasochead *lhd;
2700
2701                 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id,
2702                     new_inp->hashasocidmark)];
2703                 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash);
2704         }
2705         /* Ok. Let's restart timer. */
2706         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2707                 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp,
2708                     stcb, net);
2709         }
2710
2711         SCTP_INP_INFO_WUNLOCK();
2712         if (new_inp->sctp_tcbhash != NULL) {
2713                 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark);
2714                 new_inp->sctp_tcbhash = NULL;
2715         }
2716         if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
2717                 /* Subset bound, so copy in the laddr list from the old_inp */
2718                 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) {
2719                         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
2720                         if (laddr == NULL) {
2721                                 /*
2722                                  * Gak, what can we do? This assoc is really
2723                                  * HOSED. We probably should send an abort
2724                                  * here.
2725                                  */
2726                                 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n");
2727                                 continue;
2728                         }
2729                         SCTP_INCR_LADDR_COUNT();
2730                         memset(laddr, 0, sizeof(*laddr));
2731                         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2732                         laddr->ifa = oladdr->ifa;
2733                         atomic_add_int(&laddr->ifa->refcount, 1);
2734                         LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr,
2735                             sctp_nxt_addr);
2736                         new_inp->laddr_count++;
2737                         if (oladdr == stcb->asoc.last_used_address) {
2738                                 stcb->asoc.last_used_address = laddr;
2739                         }
2740                 }
2741         }
2742         /* Now any running timers need to be adjusted. */
2743         if (stcb->asoc.dack_timer.ep == old_inp) {
2744                 SCTP_INP_DECR_REF(old_inp);
2745                 stcb->asoc.dack_timer.ep = new_inp;
2746                 SCTP_INP_INCR_REF(new_inp);
2747         }
2748         if (stcb->asoc.asconf_timer.ep == old_inp) {
2749                 SCTP_INP_DECR_REF(old_inp);
2750                 stcb->asoc.asconf_timer.ep = new_inp;
2751                 SCTP_INP_INCR_REF(new_inp);
2752         }
2753         if (stcb->asoc.strreset_timer.ep == old_inp) {
2754                 SCTP_INP_DECR_REF(old_inp);
2755                 stcb->asoc.strreset_timer.ep = new_inp;
2756                 SCTP_INP_INCR_REF(new_inp);
2757         }
2758         if (stcb->asoc.shut_guard_timer.ep == old_inp) {
2759                 SCTP_INP_DECR_REF(old_inp);
2760                 stcb->asoc.shut_guard_timer.ep = new_inp;
2761                 SCTP_INP_INCR_REF(new_inp);
2762         }
2763         if (stcb->asoc.autoclose_timer.ep == old_inp) {
2764                 SCTP_INP_DECR_REF(old_inp);
2765                 stcb->asoc.autoclose_timer.ep = new_inp;
2766                 SCTP_INP_INCR_REF(new_inp);
2767         }
2768         if (stcb->asoc.delete_prim_timer.ep == old_inp) {
2769                 SCTP_INP_DECR_REF(old_inp);
2770                 stcb->asoc.delete_prim_timer.ep = new_inp;
2771                 SCTP_INP_INCR_REF(new_inp);
2772         }
2773         /* now what about the nets? */
2774         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2775                 if (net->pmtu_timer.ep == old_inp) {
2776                         SCTP_INP_DECR_REF(old_inp);
2777                         net->pmtu_timer.ep = new_inp;
2778                         SCTP_INP_INCR_REF(new_inp);
2779                 }
2780                 if (net->hb_timer.ep == old_inp) {
2781                         SCTP_INP_DECR_REF(old_inp);
2782                         net->hb_timer.ep = new_inp;
2783                         SCTP_INP_INCR_REF(new_inp);
2784                 }
2785                 if (net->rxt_timer.ep == old_inp) {
2786                         SCTP_INP_DECR_REF(old_inp);
2787                         net->rxt_timer.ep = new_inp;
2788                         SCTP_INP_INCR_REF(new_inp);
2789                 }
2790         }
2791         SCTP_INP_WUNLOCK(new_inp);
2792         SCTP_INP_WUNLOCK(old_inp);
2793 }
2794
2795 /*
2796  * insert an laddr entry with the given ifa for the desired list
2797  */
2798 static int
2799 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act)
2800 {
2801         struct sctp_laddr *laddr;
2802
2803         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
2804         if (laddr == NULL) {
2805                 /* out of memory? */
2806                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2807                 return (EINVAL);
2808         }
2809         SCTP_INCR_LADDR_COUNT();
2810         memset(laddr, 0, sizeof(*laddr));
2811         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2812         laddr->ifa = ifa;
2813         laddr->action = act;
2814         atomic_add_int(&ifa->refcount, 1);
2815         /* insert it */
2816         LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
2817
2818         return (0);
2819 }
2820
2821 /*
2822  * Remove an laddr entry from the local address list (on an assoc)
2823  */
2824 static void
2825 sctp_remove_laddr(struct sctp_laddr *laddr)
2826 {
2827
2828         /* remove from the list */
2829         LIST_REMOVE(laddr, sctp_nxt_addr);
2830         sctp_free_ifa(laddr->ifa);
2831         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr);
2832         SCTP_DECR_LADDR_COUNT();
2833 }
2834
2835
2836
2837 /* sctp_ifap is used to bypass normal local address validation checks */
2838 int
2839 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr,
2840     struct sctp_ifa *sctp_ifap, struct thread *p)
2841 {
2842         /* bind a ep to a socket address */
2843         struct sctppcbhead *head;
2844         struct sctp_inpcb *inp, *inp_tmp;
2845         struct inpcb *ip_inp;
2846         int port_reuse_active = 0;
2847         int bindall;
2848         uint16_t lport;
2849         int error;
2850         uint32_t vrf_id;
2851
2852         lport = 0;
2853         bindall = 1;
2854         inp = (struct sctp_inpcb *)so->so_pcb;
2855         ip_inp = (struct inpcb *)so->so_pcb;
2856 #ifdef SCTP_DEBUG
2857         if (addr) {
2858                 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n",
2859                     ntohs(((struct sockaddr_in *)addr)->sin_port));
2860                 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: ");
2861                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
2862         }
2863 #endif
2864         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
2865                 /* already did a bind, subsequent binds NOT allowed ! */
2866                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2867                 return (EINVAL);
2868         }
2869 #ifdef INVARIANTS
2870         if (p == NULL)
2871                 panic("null proc/thread");
2872 #endif
2873         if (addr != NULL) {
2874                 switch (addr->sa_family) {
2875 #ifdef INET
2876                 case AF_INET:
2877                         {
2878                                 struct sockaddr_in *sin;
2879
2880                                 /* IPV6_V6ONLY socket? */
2881                                 if (SCTP_IPV6_V6ONLY(inp)) {
2882                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2883                                         return (EINVAL);
2884                                 }
2885                                 if (addr->sa_len != sizeof(*sin)) {
2886                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2887                                         return (EINVAL);
2888                                 }
2889
2890                                 sin = (struct sockaddr_in *)addr;
2891                                 lport = sin->sin_port;
2892                                 /*
2893                                  * For LOOPBACK the prison_local_ip4() call
2894                                  * will transmute the ip address to the
2895                                  * proper value.
2896                                  */
2897                                 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) {
2898                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2899                                         return (error);
2900                                 }
2901                                 if (sin->sin_addr.s_addr != INADDR_ANY) {
2902                                         bindall = 0;
2903                                 }
2904                                 break;
2905                         }
2906 #endif
2907 #ifdef INET6
2908                 case AF_INET6:
2909                         {
2910                                 /*
2911                                  * Only for pure IPv6 Address. (No IPv4
2912                                  * Mapped!)
2913                                  */
2914                                 struct sockaddr_in6 *sin6;
2915
2916                                 sin6 = (struct sockaddr_in6 *)addr;
2917
2918                                 if (addr->sa_len != sizeof(*sin6)) {
2919                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2920                                         return (EINVAL);
2921                                 }
2922                                 lport = sin6->sin6_port;
2923                                 /*
2924                                  * For LOOPBACK the prison_local_ip6() call
2925                                  * will transmute the ipv6 address to the
2926                                  * proper value.
2927                                  */
2928                                 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr,
2929                                     (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) {
2930                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2931                                         return (error);
2932                                 }
2933                                 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2934                                         bindall = 0;
2935                                         /* KAME hack: embed scopeid */
2936                                         if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
2937                                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2938                                                 return (EINVAL);
2939                                         }
2940                                 }
2941                                 /* this must be cleared for ifa_ifwithaddr() */
2942                                 sin6->sin6_scope_id = 0;
2943                                 break;
2944                         }
2945 #endif
2946                 default:
2947                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT);
2948                         return (EAFNOSUPPORT);
2949                 }
2950         }
2951         SCTP_INP_INFO_WLOCK();
2952         SCTP_INP_WLOCK(inp);
2953         /* Setup a vrf_id to be the default for the non-bind-all case. */
2954         vrf_id = inp->def_vrf_id;
2955
2956         /* increase our count due to the unlock we do */
2957         SCTP_INP_INCR_REF(inp);
2958         if (lport) {
2959                 /*
2960                  * Did the caller specify a port? if so we must see if an ep
2961                  * already has this one bound.
2962                  */
2963                 /* got to be root to get at low ports */
2964                 if (ntohs(lport) < IPPORT_RESERVED) {
2965                         if ((p != NULL) && ((error =
2966                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
2967                             ) != 0)) {
2968                                 SCTP_INP_DECR_REF(inp);
2969                                 SCTP_INP_WUNLOCK(inp);
2970                                 SCTP_INP_INFO_WUNLOCK();
2971                                 return (error);
2972                         }
2973                 }
2974                 SCTP_INP_WUNLOCK(inp);
2975                 if (bindall) {
2976                         vrf_id = inp->def_vrf_id;
2977                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2978                         if (inp_tmp != NULL) {
2979                                 /*
2980                                  * lock guy returned and lower count note
2981                                  * that we are not bound so inp_tmp should
2982                                  * NEVER be inp. And it is this inp
2983                                  * (inp_tmp) that gets the reference bump,
2984                                  * so we must lower it.
2985                                  */
2986                                 SCTP_INP_DECR_REF(inp_tmp);
2987                                 /* unlock info */
2988                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2989                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2990                                         /*
2991                                          * Ok, must be one-2-one and
2992                                          * allowing port re-use
2993                                          */
2994                                         port_reuse_active = 1;
2995                                         goto continue_anyway;
2996                                 }
2997                                 SCTP_INP_DECR_REF(inp);
2998                                 SCTP_INP_INFO_WUNLOCK();
2999                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3000                                 return (EADDRINUSE);
3001                         }
3002                 } else {
3003                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
3004                         if (inp_tmp != NULL) {
3005                                 /*
3006                                  * lock guy returned and lower count note
3007                                  * that we are not bound so inp_tmp should
3008                                  * NEVER be inp. And it is this inp
3009                                  * (inp_tmp) that gets the reference bump,
3010                                  * so we must lower it.
3011                                  */
3012                                 SCTP_INP_DECR_REF(inp_tmp);
3013                                 /* unlock info */
3014                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
3015                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
3016                                         /*
3017                                          * Ok, must be one-2-one and
3018                                          * allowing port re-use
3019                                          */
3020                                         port_reuse_active = 1;
3021                                         goto continue_anyway;
3022                                 }
3023                                 SCTP_INP_DECR_REF(inp);
3024                                 SCTP_INP_INFO_WUNLOCK();
3025                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3026                                 return (EADDRINUSE);
3027                         }
3028                 }
3029 continue_anyway:
3030                 SCTP_INP_WLOCK(inp);
3031                 if (bindall) {
3032                         /* verify that no lport is not used by a singleton */
3033                         if ((port_reuse_active == 0) &&
3034                             (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) {
3035                                 /* Sorry someone already has this one bound */
3036                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
3037                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
3038                                         port_reuse_active = 1;
3039                                 } else {
3040                                         SCTP_INP_DECR_REF(inp);
3041                                         SCTP_INP_WUNLOCK(inp);
3042                                         SCTP_INP_INFO_WUNLOCK();
3043                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3044                                         return (EADDRINUSE);
3045                                 }
3046                         }
3047                 }
3048         } else {
3049                 uint16_t first, last, candidate;
3050                 uint16_t count;
3051                 int done;
3052
3053                 if (ip_inp->inp_flags & INP_HIGHPORT) {
3054                         first = MODULE_GLOBAL(ipport_hifirstauto);
3055                         last = MODULE_GLOBAL(ipport_hilastauto);
3056                 } else if (ip_inp->inp_flags & INP_LOWPORT) {
3057                         if (p && (error =
3058                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
3059                             )) {
3060                                 SCTP_INP_DECR_REF(inp);
3061                                 SCTP_INP_WUNLOCK(inp);
3062                                 SCTP_INP_INFO_WUNLOCK();
3063                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3064                                 return (error);
3065                         }
3066                         first = MODULE_GLOBAL(ipport_lowfirstauto);
3067                         last = MODULE_GLOBAL(ipport_lowlastauto);
3068                 } else {
3069                         first = MODULE_GLOBAL(ipport_firstauto);
3070                         last = MODULE_GLOBAL(ipport_lastauto);
3071                 }
3072                 if (first > last) {
3073                         uint16_t temp;
3074
3075                         temp = first;
3076                         first = last;
3077                         last = temp;
3078                 }
3079                 count = last - first + 1;       /* number of candidates */
3080                 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count);
3081
3082                 done = 0;
3083                 while (!done) {
3084                         if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) {
3085                                 done = 1;
3086                         }
3087                         if (!done) {
3088                                 if (--count == 0) {
3089                                         SCTP_INP_DECR_REF(inp);
3090                                         SCTP_INP_WUNLOCK(inp);
3091                                         SCTP_INP_INFO_WUNLOCK();
3092                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3093                                         return (EADDRINUSE);
3094                                 }
3095                                 if (candidate == last)
3096                                         candidate = first;
3097                                 else
3098                                         candidate = candidate + 1;
3099                         }
3100                 }
3101                 lport = htons(candidate);
3102         }
3103         SCTP_INP_DECR_REF(inp);
3104         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
3105             SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
3106                 /*
3107                  * this really should not happen. The guy did a non-blocking
3108                  * bind and then did a close at the same time.
3109                  */
3110                 SCTP_INP_WUNLOCK(inp);
3111                 SCTP_INP_INFO_WUNLOCK();
3112                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3113                 return (EINVAL);
3114         }
3115         /* ok we look clear to give out this port, so lets setup the binding */
3116         if (bindall) {
3117                 /* binding to all addresses, so just set in the proper flags */
3118                 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL;
3119                 /* set the automatic addr changes from kernel flag */
3120                 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) {
3121                         sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3122                         sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3123                 } else {
3124                         sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3125                         sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3126                 }
3127                 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) {
3128                         sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3129                 } else {
3130                         sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3131                 }
3132                 /*
3133                  * set the automatic mobility_base from kernel flag (by
3134                  * micchie)
3135                  */
3136                 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) {
3137                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE);
3138                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3139                 } else {
3140                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE);
3141                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3142                 }
3143                 /*
3144                  * set the automatic mobility_fasthandoff from kernel flag
3145                  * (by micchie)
3146                  */
3147                 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) {
3148                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF);
3149                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3150                 } else {
3151                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF);
3152                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3153                 }
3154         } else {
3155                 /*
3156                  * bind specific, make sure flags is off and add a new
3157                  * address structure to the sctp_addr_list inside the ep
3158                  * structure.
3159                  *
3160                  * We will need to allocate one and insert it at the head.
3161                  * The socketopt call can just insert new addresses in there
3162                  * as well. It will also have to do the embed scope kame
3163                  * hack too (before adding).
3164                  */
3165                 struct sctp_ifa *ifa;
3166                 union sctp_sockstore store;
3167
3168                 memset(&store, 0, sizeof(store));
3169                 switch (addr->sa_family) {
3170 #ifdef INET
3171                 case AF_INET:
3172                         memcpy(&store.sin, addr, sizeof(struct sockaddr_in));
3173                         store.sin.sin_port = 0;
3174                         break;
3175 #endif
3176 #ifdef INET6
3177                 case AF_INET6:
3178                         memcpy(&store.sin6, addr, sizeof(struct sockaddr_in6));
3179                         store.sin6.sin6_port = 0;
3180                         break;
3181 #endif
3182                 default:
3183                         break;
3184                 }
3185                 /*
3186                  * first find the interface with the bound address need to
3187                  * zero out the port to find the address! yuck! can't do
3188                  * this earlier since need port for sctp_pcb_findep()
3189                  */
3190                 if (sctp_ifap != NULL) {
3191                         ifa = sctp_ifap;
3192                 } else {
3193                         /*
3194                          * Note for BSD we hit here always other O/S's will
3195                          * pass things in via the sctp_ifap argument.
3196                          */
3197                         ifa = sctp_find_ifa_by_addr(&store.sa,
3198                             vrf_id, SCTP_ADDR_NOT_LOCKED);
3199                 }
3200                 if (ifa == NULL) {
3201                         /* Can't find an interface with that address */
3202                         SCTP_INP_WUNLOCK(inp);
3203                         SCTP_INP_INFO_WUNLOCK();
3204                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL);
3205                         return (EADDRNOTAVAIL);
3206                 }
3207 #ifdef INET6
3208                 if (addr->sa_family == AF_INET6) {
3209                         /* GAK, more FIXME IFA lock? */
3210                         if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
3211                                 /* Can't bind a non-existent addr. */
3212                                 SCTP_INP_WUNLOCK(inp);
3213                                 SCTP_INP_INFO_WUNLOCK();
3214                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3215                                 return (EINVAL);
3216                         }
3217                 }
3218 #endif
3219                 /* we're not bound all */
3220                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
3221                 /* allow bindx() to send ASCONF's for binding changes */
3222                 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3223                 /* clear automatic addr changes from kernel flag */
3224                 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3225
3226                 /* add this address to the endpoint list */
3227                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0);
3228                 if (error != 0) {
3229                         SCTP_INP_WUNLOCK(inp);
3230                         SCTP_INP_INFO_WUNLOCK();
3231                         return (error);
3232                 }
3233                 inp->laddr_count++;
3234         }
3235         /* find the bucket */
3236         if (port_reuse_active) {
3237                 /* Put it into tcp 1-2-1 hash */
3238                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))];
3239                 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
3240         } else {
3241                 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))];
3242         }
3243         /* put it in the bucket */
3244         LIST_INSERT_HEAD(head, inp, sctp_hash);
3245         SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n",
3246             (void *)head, ntohs(lport), port_reuse_active);
3247         /* set in the port */
3248         inp->sctp_lport = lport;
3249
3250         /* turn off just the unbound flag */
3251         inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
3252         SCTP_INP_WUNLOCK(inp);
3253         SCTP_INP_INFO_WUNLOCK();
3254         return (0);
3255 }
3256
3257
3258 static void
3259 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp)
3260 {
3261         struct sctp_iterator *it, *nit;
3262
3263         /*
3264          * We enter with the only the ITERATOR_LOCK in place and a write
3265          * lock on the inp_info stuff.
3266          */
3267         it = sctp_it_ctl.cur_it;
3268         if (it && (it->vn != curvnet)) {
3269                 /* Its not looking at our VNET */
3270                 return;
3271         }
3272         if (it && (it->inp == inp)) {
3273                 /*
3274                  * This is tricky and we hold the iterator lock, but when it
3275                  * returns and gets the lock (when we release it) the
3276                  * iterator will try to operate on inp. We need to stop that
3277                  * from happening. But of course the iterator has a
3278                  * reference on the stcb and inp. We can mark it and it will
3279                  * stop.
3280                  *
3281                  * If its a single iterator situation, we set the end
3282                  * iterator flag. Otherwise we set the iterator to go to the
3283                  * next inp.
3284                  *
3285                  */
3286                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3287                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
3288                 } else {
3289                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP;
3290                 }
3291         }
3292         /*
3293          * Now go through and remove any single reference to our inp that
3294          * may be still pending on the list
3295          */
3296         SCTP_IPI_ITERATOR_WQ_LOCK();
3297         TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
3298                 if (it->vn != curvnet) {
3299                         continue;
3300                 }
3301                 if (it->inp == inp) {
3302                         /* This one points to me is it inp specific? */
3303                         if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3304                                 /* Remove and free this one */
3305                                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead,
3306                                     it, sctp_nxt_itr);
3307                                 if (it->function_atend != NULL) {
3308                                         (*it->function_atend) (it->pointer, it->val);
3309                                 }
3310                                 SCTP_FREE(it, SCTP_M_ITER);
3311                         } else {
3312                                 it->inp = LIST_NEXT(it->inp, sctp_list);
3313                                 if (it->inp) {
3314                                         SCTP_INP_INCR_REF(it->inp);
3315                                 }
3316                         }
3317                         /*
3318                          * When its put in the refcnt is incremented so decr
3319                          * it
3320                          */
3321                         SCTP_INP_DECR_REF(inp);
3322                 }
3323         }
3324         SCTP_IPI_ITERATOR_WQ_UNLOCK();
3325 }
3326
3327 /* release sctp_inpcb unbind the port */
3328 void
3329 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from)
3330 {
3331         /*
3332          * Here we free a endpoint. We must find it (if it is in the Hash
3333          * table) and remove it from there. Then we must also find it in the
3334          * overall list and remove it from there. After all removals are
3335          * complete then any timer has to be stopped. Then start the actual
3336          * freeing. a) Any local lists. b) Any associations. c) The hash of
3337          * all associations. d) finally the ep itself.
3338          */
3339         struct sctp_tcb *asoc, *nasoc;
3340         struct sctp_laddr *laddr, *nladdr;
3341         struct inpcb *ip_pcb;
3342         struct socket *so;
3343         int being_refed = 0;
3344         struct sctp_queued_to_read *sq, *nsq;
3345         int cnt;
3346         sctp_sharedkey_t *shared_key, *nshared_key;
3347
3348
3349 #ifdef SCTP_LOG_CLOSING
3350         sctp_log_closing(inp, NULL, 0);
3351 #endif
3352         SCTP_ITERATOR_LOCK();
3353         /* mark any iterators on the list or being processed */
3354         sctp_iterator_inp_being_freed(inp);
3355         SCTP_ITERATOR_UNLOCK();
3356         so = inp->sctp_socket;
3357         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
3358                 /* been here before.. eeks.. get out of here */
3359                 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate);
3360 #ifdef SCTP_LOG_CLOSING
3361                 sctp_log_closing(inp, NULL, 1);
3362 #endif
3363                 return;
3364         }
3365         SCTP_ASOC_CREATE_LOCK(inp);
3366         SCTP_INP_INFO_WLOCK();
3367
3368         SCTP_INP_WLOCK(inp);
3369         if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) {
3370                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP;
3371                 /* socket is gone, so no more wakeups allowed */
3372                 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE;
3373                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT;
3374                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT;
3375
3376         }
3377         /* First time through we have the socket lock, after that no more. */
3378         sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL,
3379             SCTP_FROM_SCTP_PCB + SCTP_LOC_1);
3380
3381         if (inp->control) {
3382                 sctp_m_freem(inp->control);
3383                 inp->control = NULL;
3384         }
3385         if (inp->pkt) {
3386                 sctp_m_freem(inp->pkt);
3387                 inp->pkt = NULL;
3388         }
3389         ip_pcb = &inp->ip_inp.inp;      /* we could just cast the main pointer
3390                                          * here but I will be nice :> (i.e.
3391                                          * ip_pcb = ep;) */
3392         if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
3393                 int cnt_in_sd;
3394
3395                 cnt_in_sd = 0;
3396                 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3397                         SCTP_TCB_LOCK(asoc);
3398                         if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3399                                 /* Skip guys being freed */
3400                                 cnt_in_sd++;
3401                                 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3402                                         /*
3403                                          * Special case - we did not start a
3404                                          * kill timer on the asoc due to it
3405                                          * was not closed. So go ahead and
3406                                          * start it now.
3407                                          */
3408                                         SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_IN_ACCEPT_QUEUE);
3409                                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3410                                 }
3411                                 SCTP_TCB_UNLOCK(asoc);
3412                                 continue;
3413                         }
3414                         if (((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
3415                             (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) &&
3416                             (asoc->asoc.total_output_queue_size == 0)) {
3417                                 /*
3418                                  * If we have data in queue, we don't want
3419                                  * to just free since the app may have done,
3420                                  * send()/close or connect/send/close. And
3421                                  * it wants the data to get across first.
3422                                  */
3423                                 /* Just abandon things in the front states */
3424                                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE,
3425                                     SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) {
3426                                         cnt_in_sd++;
3427                                 }
3428                                 continue;
3429                         }
3430                         /* Disconnect the socket please */
3431                         asoc->sctp_socket = NULL;
3432                         SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_CLOSED_SOCKET);
3433                         if ((asoc->asoc.size_on_reasm_queue > 0) ||
3434                             (asoc->asoc.control_pdapi) ||
3435                             (asoc->asoc.size_on_all_streams > 0) ||
3436                             (so && (so->so_rcv.sb_cc > 0))) {
3437                                 /* Left with Data unread */
3438                                 struct mbuf *op_err;
3439
3440                                 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3441                                 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3;
3442                                 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3443                                 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3444                                 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
3445                                     (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3446                                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3447                                 }
3448                                 if (sctp_free_assoc(inp, asoc,
3449                                     SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) {
3450                                         cnt_in_sd++;
3451                                 }
3452                                 continue;
3453                         } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3454                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3455                             (asoc->asoc.stream_queue_cnt == 0)) {
3456                                 if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (asoc, &asoc->asoc)) {
3457                                         goto abort_anyway;
3458                                 }
3459                                 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
3460                                     (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
3461                                         struct sctp_nets *netp;
3462
3463                                         /*
3464                                          * there is nothing queued to send,
3465                                          * so I send shutdown
3466                                          */
3467                                         if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
3468                                             (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3469                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3470                                         }
3471                                         SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT);
3472                                         sctp_stop_timers_for_shutdown(asoc);
3473                                         if (asoc->asoc.alternate) {
3474                                                 netp = asoc->asoc.alternate;
3475                                         } else {
3476                                                 netp = asoc->asoc.primary_destination;
3477                                         }
3478                                         sctp_send_shutdown(asoc, netp);
3479                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
3480                                             netp);
3481                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, NULL);
3482                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED);
3483                                 }
3484                         } else {
3485                                 /* mark into shutdown pending */
3486                                 SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
3487                                 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, NULL);
3488                                 if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (asoc, &asoc->asoc)) {
3489                                         SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_PARTIAL_MSG_LEFT);
3490                                 }
3491                                 if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3492                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3493                                     (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
3494                                         struct mbuf *op_err;
3495
3496                         abort_anyway:
3497                                         op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3498                                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5;
3499                                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3500                                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3501                                         if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
3502                                             (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3503                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3504                                         }
3505                                         if (sctp_free_assoc(inp, asoc,
3506                                             SCTP_PCBFREE_NOFORCE,
3507                                             SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) {
3508                                                 cnt_in_sd++;
3509                                         }
3510                                         continue;
3511                                 } else {
3512                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED);
3513                                 }
3514                         }
3515                         cnt_in_sd++;
3516                         SCTP_TCB_UNLOCK(asoc);
3517                 }
3518                 /* now is there some left in our SHUTDOWN state? */
3519                 if (cnt_in_sd) {
3520 #ifdef SCTP_LOG_CLOSING
3521                         sctp_log_closing(inp, NULL, 2);
3522 #endif
3523                         inp->sctp_socket = NULL;
3524                         SCTP_INP_WUNLOCK(inp);
3525                         SCTP_ASOC_CREATE_UNLOCK(inp);
3526                         SCTP_INP_INFO_WUNLOCK();
3527                         return;
3528                 }
3529         }
3530         inp->sctp_socket = NULL;
3531         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
3532             SCTP_PCB_FLAGS_UNBOUND) {
3533                 /*
3534                  * ok, this guy has been bound. It's port is somewhere in
3535                  * the SCTP_BASE_INFO(hash table). Remove it!
3536                  */
3537                 LIST_REMOVE(inp, sctp_hash);
3538                 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND;
3539         }
3540
3541         /*
3542          * If there is a timer running to kill us, forget it, since it may
3543          * have a contest on the INP lock.. which would cause us to die ...
3544          */
3545         cnt = 0;
3546         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3547                 SCTP_TCB_LOCK(asoc);
3548                 if (immediate != SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
3549                         /* Disconnect the socket please */
3550                         asoc->sctp_socket = NULL;
3551                         SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_CLOSED_SOCKET);
3552                 }
3553                 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3554                         if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3555                                 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_IN_ACCEPT_QUEUE);
3556                                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3557                         }
3558                         cnt++;
3559                         SCTP_TCB_UNLOCK(asoc);
3560                         continue;
3561                 }
3562                 /* Free associations that are NOT killing us */
3563                 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_COOKIE_WAIT) &&
3564                     ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) {
3565                         struct mbuf *op_err;
3566
3567                         op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3568                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7;
3569                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3570                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3571                 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3572                         cnt++;
3573                         SCTP_TCB_UNLOCK(asoc);
3574                         continue;
3575                 }
3576                 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
3577                     (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3578                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3579                 }
3580                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE,
3581                     SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) {
3582                         cnt++;
3583                 }
3584         }
3585         if (cnt) {
3586                 /* Ok we have someone out there that will kill us */
3587 #ifdef SCTP_LOG_CLOSING
3588                 sctp_log_closing(inp, NULL, 3);
3589 #endif
3590                 SCTP_INP_WUNLOCK(inp);
3591                 SCTP_ASOC_CREATE_UNLOCK(inp);
3592                 SCTP_INP_INFO_WUNLOCK();
3593                 return;
3594         }
3595         if (SCTP_INP_LOCK_CONTENDED(inp))
3596                 being_refed++;
3597         if (SCTP_INP_READ_CONTENDED(inp))
3598                 being_refed++;
3599         if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp))
3600                 being_refed++;
3601         /* NOTE: 0 refcount also means no timers are referencing us. */
3602         if ((inp->refcount) ||
3603             (being_refed) ||
3604             (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) {
3605 #ifdef SCTP_LOG_CLOSING
3606                 sctp_log_closing(inp, NULL, 4);
3607 #endif
3608                 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
3609                 SCTP_INP_WUNLOCK(inp);
3610                 SCTP_ASOC_CREATE_UNLOCK(inp);
3611                 SCTP_INP_INFO_WUNLOCK();
3612                 return;
3613         }
3614         inp->sctp_ep.signature_change.type = 0;
3615         inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
3616         /*
3617          * Remove it from the list .. last thing we need a lock for.
3618          */
3619         LIST_REMOVE(inp, sctp_list);
3620         SCTP_INP_WUNLOCK(inp);
3621         SCTP_ASOC_CREATE_UNLOCK(inp);
3622         SCTP_INP_INFO_WUNLOCK();
3623
3624 #ifdef SCTP_LOG_CLOSING
3625         sctp_log_closing(inp, NULL, 5);
3626 #endif
3627
3628         if ((inp->sctp_asocidhash) != NULL) {
3629                 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark);
3630                 inp->sctp_asocidhash = NULL;
3631         }
3632         /* sa_ignore FREED_MEMORY */
3633         TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) {
3634                 /* Its only abandoned if it had data left */
3635                 if (sq->length)
3636                         SCTP_STAT_INCR(sctps_left_abandon);
3637
3638                 TAILQ_REMOVE(&inp->read_queue, sq, next);
3639                 sctp_free_remote_addr(sq->whoFrom);
3640                 if (so)
3641                         so->so_rcv.sb_cc -= sq->length;
3642                 if (sq->data) {
3643                         sctp_m_freem(sq->data);
3644                         sq->data = NULL;
3645                 }
3646                 /*
3647                  * no need to free the net count, since at this point all
3648                  * assoc's are gone.
3649                  */
3650                 sctp_free_a_readq(NULL, sq);
3651         }
3652         /* Now the sctp_pcb things */
3653         /*
3654          * free each asoc if it is not already closed/free. we can't use the
3655          * macro here since le_next will get freed as part of the
3656          * sctp_free_assoc() call.
3657          */
3658         if (ip_pcb->inp_options) {
3659                 (void)sctp_m_free(ip_pcb->inp_options);
3660                 ip_pcb->inp_options = 0;
3661         }
3662
3663 #ifdef INET6
3664         if (ip_pcb->inp_vflag & INP_IPV6) {
3665                 ip6_freepcbopts(ip_pcb->in6p_outputopts);
3666         }
3667 #endif                          /* INET6 */
3668         ip_pcb->inp_vflag = 0;
3669         /* free up authentication fields */
3670         if (inp->sctp_ep.local_auth_chunks != NULL)
3671                 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
3672         if (inp->sctp_ep.local_hmacs != NULL)
3673                 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
3674
3675         LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) {
3676                 LIST_REMOVE(shared_key, next);
3677                 sctp_free_sharedkey(shared_key);
3678                 /* sa_ignore FREED_MEMORY */
3679         }
3680
3681         /*
3682          * if we have an address list the following will free the list of
3683          * ifaddr's that are set into this ep. Again macro limitations here,
3684          * since the LIST_FOREACH could be a bad idea.
3685          */
3686         LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) {
3687                 sctp_remove_laddr(laddr);
3688         }
3689
3690 #ifdef SCTP_TRACK_FREED_ASOCS
3691         /* TEMP CODE */
3692         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) {
3693                 LIST_REMOVE(asoc, sctp_tcblist);
3694                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc);
3695                 SCTP_DECR_ASOC_COUNT();
3696         }
3697         /* *** END TEMP CODE *** */
3698 #endif
3699         /* Now lets see about freeing the EP hash table. */
3700         if (inp->sctp_tcbhash != NULL) {
3701                 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
3702                 inp->sctp_tcbhash = NULL;
3703         }
3704         /* Now we must put the ep memory back into the zone pool */
3705         crfree(inp->ip_inp.inp.inp_cred);
3706         INP_LOCK_DESTROY(&inp->ip_inp.inp);
3707         SCTP_INP_LOCK_DESTROY(inp);
3708         SCTP_INP_READ_DESTROY(inp);
3709         SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
3710         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
3711         SCTP_DECR_EP_COUNT();
3712 }
3713
3714
3715 struct sctp_nets *
3716 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
3717 {
3718         struct sctp_nets *net;
3719
3720         /* locate the address */
3721         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3722                 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
3723                         return (net);
3724         }
3725         return (NULL);
3726 }
3727
3728
3729 int
3730 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id)
3731 {
3732         struct sctp_ifa *sctp_ifa;
3733
3734         sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED);
3735         if (sctp_ifa) {
3736                 return (1);
3737         } else {
3738                 return (0);
3739         }
3740 }
3741
3742 /*
3743  * add's a remote endpoint address, done with the INIT/INIT-ACK as well as
3744  * when a ASCONF arrives that adds it. It will also initialize all the cwnd
3745  * stats of stuff.
3746  */
3747 int
3748 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
3749     struct sctp_nets **netp, uint16_t port, int set_scope, int from)
3750 {
3751         /*
3752          * The following is redundant to the same lines in the
3753          * sctp_aloc_assoc() but is needed since others call the add address
3754          * function
3755          */
3756         struct sctp_nets *net, *netfirst;
3757         int addr_inscope;
3758
3759         SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ",
3760             from);
3761         SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr);
3762
3763         netfirst = sctp_findnet(stcb, newaddr);
3764         if (netfirst) {
3765                 /*
3766                  * Lie and return ok, we don't want to make the association
3767                  * go away for this behavior. It will happen in the TCP
3768                  * model in a connected socket. It does not reach the hash
3769                  * table until after the association is built so it can't be
3770                  * found. Mark as reachable, since the initial creation will
3771                  * have been cleared and the NOT_IN_ASSOC flag will have
3772                  * been added... and we don't want to end up removing it
3773                  * back out.
3774                  */
3775                 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
3776                         netfirst->dest_state = (SCTP_ADDR_REACHABLE |
3777                             SCTP_ADDR_UNCONFIRMED);
3778                 } else {
3779                         netfirst->dest_state = SCTP_ADDR_REACHABLE;
3780                 }
3781
3782                 return (0);
3783         }
3784         addr_inscope = 1;
3785         switch (newaddr->sa_family) {
3786 #ifdef INET
3787         case AF_INET:
3788                 {
3789                         struct sockaddr_in *sin;
3790
3791                         sin = (struct sockaddr_in *)newaddr;
3792                         if (sin->sin_addr.s_addr == 0) {
3793                                 /* Invalid address */
3794                                 return (-1);
3795                         }
3796                         /* zero out the zero area */
3797                         memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
3798
3799                         /* assure len is set */
3800                         sin->sin_len = sizeof(struct sockaddr_in);
3801                         if (set_scope) {
3802                                 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
3803                                         stcb->asoc.scope.ipv4_local_scope = 1;
3804                                 }
3805                         } else {
3806                                 /* Validate the address is in scope */
3807                                 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
3808                                     (stcb->asoc.scope.ipv4_local_scope == 0)) {
3809                                         addr_inscope = 0;
3810                                 }
3811                         }
3812                         break;
3813                 }
3814 #endif
3815 #ifdef INET6
3816         case AF_INET6:
3817                 {
3818                         struct sockaddr_in6 *sin6;
3819
3820                         sin6 = (struct sockaddr_in6 *)newaddr;
3821                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
3822                                 /* Invalid address */
3823                                 return (-1);
3824                         }
3825                         /* assure len is set */
3826                         sin6->sin6_len = sizeof(struct sockaddr_in6);
3827                         if (set_scope) {
3828                                 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) {
3829                                         stcb->asoc.scope.loopback_scope = 1;
3830                                         stcb->asoc.scope.local_scope = 0;
3831                                         stcb->asoc.scope.ipv4_local_scope = 1;
3832                                         stcb->asoc.scope.site_scope = 1;
3833                                 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
3834                                         /*
3835                                          * If the new destination is a
3836                                          * LINK_LOCAL we must have common
3837                                          * site scope. Don't set the local
3838                                          * scope since we may not share all
3839                                          * links, only loopback can do this.
3840                                          * Links on the local network would
3841                                          * also be on our private network
3842                                          * for v4 too.
3843                                          */
3844                                         stcb->asoc.scope.ipv4_local_scope = 1;
3845                                         stcb->asoc.scope.site_scope = 1;
3846                                 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
3847                                         /*
3848                                          * If the new destination is
3849                                          * SITE_LOCAL then we must have site
3850                                          * scope in common.
3851                                          */
3852                                         stcb->asoc.scope.site_scope = 1;
3853                                 }
3854                         } else {
3855                                 /* Validate the address is in scope */
3856                                 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
3857                                     (stcb->asoc.scope.loopback_scope == 0)) {
3858                                         addr_inscope = 0;
3859                                 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
3860                                     (stcb->asoc.scope.local_scope == 0)) {
3861                                         addr_inscope = 0;
3862                                 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
3863                                     (stcb->asoc.scope.site_scope == 0)) {
3864                                         addr_inscope = 0;
3865                                 }
3866                         }
3867                         break;
3868                 }
3869 #endif
3870         default:
3871                 /* not supported family type */
3872                 return (-1);
3873         }
3874         net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets);
3875         if (net == NULL) {
3876                 return (-1);
3877         }
3878         SCTP_INCR_RADDR_COUNT();
3879         memset(net, 0, sizeof(struct sctp_nets));
3880         (void)SCTP_GETTIME_TIMEVAL(&net->start_time);
3881         memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
3882         switch (newaddr->sa_family) {
3883 #ifdef INET
3884         case AF_INET:
3885                 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
3886                 break;
3887 #endif
3888 #ifdef INET6
3889         case AF_INET6:
3890                 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
3891                 break;
3892 #endif
3893         default:
3894                 break;
3895         }
3896         net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id);
3897         if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) {
3898                 stcb->asoc.scope.loopback_scope = 1;
3899                 stcb->asoc.scope.ipv4_local_scope = 1;
3900                 stcb->asoc.scope.local_scope = 0;
3901                 stcb->asoc.scope.site_scope = 1;
3902                 addr_inscope = 1;
3903         }
3904         net->failure_threshold = stcb->asoc.def_net_failure;
3905         net->pf_threshold = stcb->asoc.def_net_pf_threshold;
3906         if (addr_inscope == 0) {
3907                 net->dest_state = (SCTP_ADDR_REACHABLE |
3908                     SCTP_ADDR_OUT_OF_SCOPE);
3909         } else {
3910                 if (from == SCTP_ADDR_IS_CONFIRMED)
3911                         /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */
3912                         net->dest_state = SCTP_ADDR_REACHABLE;
3913                 else
3914                         net->dest_state = SCTP_ADDR_REACHABLE |
3915                             SCTP_ADDR_UNCONFIRMED;
3916         }
3917         /*
3918          * We set this to 0, the timer code knows that this means its an
3919          * initial value
3920          */
3921         net->rto_needed = 1;
3922         net->RTO = 0;
3923         net->RTO_measured = 0;
3924         stcb->asoc.numnets++;
3925         net->ref_count = 1;
3926         net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1;
3927         net->port = port;
3928         net->dscp = stcb->asoc.default_dscp;
3929 #ifdef INET6
3930         net->flowlabel = stcb->asoc.default_flowlabel;
3931 #endif
3932         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) {
3933                 net->dest_state |= SCTP_ADDR_NOHB;
3934         } else {
3935                 net->dest_state &= ~SCTP_ADDR_NOHB;
3936         }
3937         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) {
3938                 net->dest_state |= SCTP_ADDR_NO_PMTUD;
3939         } else {
3940                 net->dest_state &= ~SCTP_ADDR_NO_PMTUD;
3941         }
3942         net->heart_beat_delay = stcb->asoc.heart_beat_delay;
3943         /* Init the timer structure */
3944         SCTP_OS_TIMER_INIT(&net->rxt_timer.timer);
3945         SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer);
3946         SCTP_OS_TIMER_INIT(&net->hb_timer.timer);
3947
3948         /* Now generate a route for this guy */
3949 #ifdef INET6
3950         /* KAME hack: embed scopeid */
3951         if (newaddr->sa_family == AF_INET6) {
3952                 struct sockaddr_in6 *sin6;
3953
3954                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3955                 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
3956                 sin6->sin6_scope_id = 0;
3957         }
3958 #endif
3959         SCTP_RTALLOC((sctp_route_t *)&net->ro,
3960             stcb->asoc.vrf_id,
3961             stcb->sctp_ep->fibnum);
3962
3963         net->src_addr_selected = 0;
3964         if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) {
3965                 /* Get source address */
3966                 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep,
3967                     stcb,
3968                     (sctp_route_t *)&net->ro,
3969                     net,
3970                     0,
3971                     stcb->asoc.vrf_id);
3972                 if (stcb->asoc.default_mtu > 0) {
3973                         net->mtu = stcb->asoc.default_mtu;
3974                         switch (net->ro._l_addr.sa.sa_family) {
3975 #ifdef INET
3976                         case AF_INET:
3977                                 net->mtu += SCTP_MIN_V4_OVERHEAD;
3978                                 break;
3979 #endif
3980 #ifdef INET6
3981                         case AF_INET6:
3982                                 net->mtu += SCTP_MIN_OVERHEAD;
3983                                 break;
3984 #endif
3985                         default:
3986                                 break;
3987                         }
3988 #if defined(INET) || defined(INET6)
3989                         if (net->port) {
3990                                 net->mtu += (uint32_t)sizeof(struct udphdr);
3991                         }
3992 #endif
3993                 } else if (net->ro._s_addr != NULL) {
3994                         uint32_t imtu, rmtu, hcmtu;
3995
3996                         net->src_addr_selected = 1;
3997                         /* Now get the interface MTU */
3998                         if (net->ro._s_addr->ifn_p != NULL) {
3999                                 imtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p);
4000                         } else {
4001                                 imtu = 0;
4002                         }
4003                         rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt);
4004                         hcmtu = sctp_hc_get_mtu(&net->ro._l_addr, stcb->sctp_ep->fibnum);
4005                         net->mtu = sctp_min_mtu(hcmtu, rmtu, imtu);
4006                         if (rmtu == 0) {
4007                                 /*
4008                                  * Start things off to match mtu of
4009                                  * interface please.
4010                                  */
4011                                 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa,
4012                                     net->ro.ro_rt, net->mtu);
4013                         }
4014                 }
4015         }
4016         if (net->mtu == 0) {
4017                 if (stcb->asoc.default_mtu > 0) {
4018                         net->mtu = stcb->asoc.default_mtu;
4019                         switch (net->ro._l_addr.sa.sa_family) {
4020 #ifdef INET
4021                         case AF_INET:
4022                                 net->mtu += SCTP_MIN_V4_OVERHEAD;
4023                                 break;
4024 #endif
4025 #ifdef INET6
4026                         case AF_INET6:
4027                                 net->mtu += SCTP_MIN_OVERHEAD;
4028                                 break;
4029 #endif
4030                         default:
4031                                 break;
4032                         }
4033 #if defined(INET) || defined(INET6)
4034                         if (net->port) {
4035                                 net->mtu += (uint32_t)sizeof(struct udphdr);
4036                         }
4037 #endif
4038                 } else {
4039                         switch (newaddr->sa_family) {
4040 #ifdef INET
4041                         case AF_INET:
4042                                 net->mtu = SCTP_DEFAULT_MTU;
4043                                 break;
4044 #endif
4045 #ifdef INET6
4046                         case AF_INET6:
4047                                 net->mtu = 1280;
4048                                 break;
4049 #endif
4050                         default:
4051                                 break;
4052                         }
4053                 }
4054         }
4055 #if defined(INET) || defined(INET6)
4056         if (net->port) {
4057                 net->mtu -= (uint32_t)sizeof(struct udphdr);
4058         }
4059 #endif
4060         if (from == SCTP_ALLOC_ASOC) {
4061                 stcb->asoc.smallest_mtu = net->mtu;
4062         }
4063         if (stcb->asoc.smallest_mtu > net->mtu) {
4064                 sctp_pathmtu_adjustment(stcb, net->mtu);
4065         }
4066 #ifdef INET6
4067         if (newaddr->sa_family == AF_INET6) {
4068                 struct sockaddr_in6 *sin6;
4069
4070                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4071                 (void)sa6_recoverscope(sin6);
4072         }
4073 #endif
4074
4075         /* JRS - Use the congestion control given in the CC module */
4076         if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL)
4077                 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net);
4078
4079         /*
4080          * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning
4081          * of assoc (2005/06/27, iyengar@cis.udel.edu)
4082          */
4083         net->find_pseudo_cumack = 1;
4084         net->find_rtx_pseudo_cumack = 1;
4085         /* Choose an initial flowid. */
4086         net->flowid = stcb->asoc.my_vtag ^
4087             ntohs(stcb->rport) ^
4088             ntohs(stcb->sctp_ep->sctp_lport);
4089         net->flowtype = M_HASHTYPE_OPAQUE_HASH;
4090         if (netp) {
4091                 *netp = net;
4092         }
4093         netfirst = TAILQ_FIRST(&stcb->asoc.nets);
4094         if (net->ro.ro_rt == NULL) {
4095                 /* Since we have no route put it at the back */
4096                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4097         } else if (netfirst == NULL) {
4098                 /* We are the first one in the pool. */
4099                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4100         } else if (netfirst->ro.ro_rt == NULL) {
4101                 /*
4102                  * First one has NO route. Place this one ahead of the first
4103                  * one.
4104                  */
4105                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4106         } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) {
4107                 /*
4108                  * This one has a different interface than the one at the
4109                  * top of the list. Place it ahead.
4110                  */
4111                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4112         } else {
4113                 /*
4114                  * Ok we have the same interface as the first one. Move
4115                  * forward until we find either a) one with a NULL route...
4116                  * insert ahead of that b) one with a different ifp.. insert
4117                  * after that. c) end of the list.. insert at the tail.
4118                  */
4119                 struct sctp_nets *netlook;
4120
4121                 do {
4122                         netlook = TAILQ_NEXT(netfirst, sctp_next);
4123                         if (netlook == NULL) {
4124                                 /* End of the list */
4125                                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4126                                 break;
4127                         } else if (netlook->ro.ro_rt == NULL) {
4128                                 /* next one has NO route */
4129                                 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
4130                                 break;
4131                         } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) {
4132                                 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
4133                                     net, sctp_next);
4134                                 break;
4135                         }
4136                         /* Shift forward */
4137                         netfirst = netlook;
4138                 } while (netlook != NULL);
4139         }
4140
4141         /* got to have a primary set */
4142         if (stcb->asoc.primary_destination == 0) {
4143                 stcb->asoc.primary_destination = net;
4144         } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) &&
4145                     (net->ro.ro_rt) &&
4146             ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
4147                 /* No route to current primary adopt new primary */
4148                 stcb->asoc.primary_destination = net;
4149         }
4150         /* Validate primary is first */
4151         net = TAILQ_FIRST(&stcb->asoc.nets);
4152         if ((net != stcb->asoc.primary_destination) &&
4153             (stcb->asoc.primary_destination)) {
4154                 /*
4155                  * first one on the list is NOT the primary sctp_cmpaddr()
4156                  * is much more efficient if the primary is the first on the
4157                  * list, make it so.
4158                  */
4159                 TAILQ_REMOVE(&stcb->asoc.nets,
4160                     stcb->asoc.primary_destination, sctp_next);
4161                 TAILQ_INSERT_HEAD(&stcb->asoc.nets,
4162                     stcb->asoc.primary_destination, sctp_next);
4163         }
4164         return (0);
4165 }
4166
4167
4168 static uint32_t
4169 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
4170 {
4171         uint32_t id;
4172         struct sctpasochead *head;
4173         struct sctp_tcb *lstcb;
4174
4175 try_again:
4176         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
4177                 /* TSNH */
4178                 return (0);
4179         }
4180         /*
4181          * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC,
4182          * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC.
4183          */
4184         if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) {
4185                 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1;
4186         }
4187         id = inp->sctp_associd_counter;
4188         inp->sctp_associd_counter++;
4189         lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t)id, 0);
4190         if (lstcb) {
4191                 goto try_again;
4192         }
4193         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
4194         LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash);
4195         stcb->asoc.in_asocid_hash = 1;
4196         return (id);
4197 }
4198
4199 /*
4200  * allocate an association and add it to the endpoint. The caller must be
4201  * careful to add all additional addresses once they are know right away or
4202  * else the assoc will be may experience a blackout scenario.
4203  */
4204 struct sctp_tcb *
4205 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
4206     int *error, uint32_t override_tag, uint32_t vrf_id,
4207     uint16_t o_streams, uint16_t port,
4208     struct thread *p,
4209     int initialize_auth_params)
4210 {
4211         /* note the p argument is only valid in unbound sockets */
4212
4213         struct sctp_tcb *stcb;
4214         struct sctp_association *asoc;
4215         struct sctpasochead *head;
4216         uint16_t rport;
4217         int err;
4218
4219         /*
4220          * Assumption made here: Caller has done a
4221          * sctp_findassociation_ep_addr(ep, addr's); to make sure the
4222          * address does not exist already.
4223          */
4224         if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) {
4225                 /* Hit max assoc, sorry no more */
4226                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4227                 *error = ENOBUFS;
4228                 return (NULL);
4229         }
4230         if (firstaddr == NULL) {
4231                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4232                 *error = EINVAL;
4233                 return (NULL);
4234         }
4235         SCTP_INP_RLOCK(inp);
4236         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) &&
4237             ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) ||
4238             (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) {
4239                 /*
4240                  * If its in the TCP pool, its NOT allowed to create an
4241                  * association. The parent listener needs to call
4242                  * sctp_aloc_assoc.. or the one-2-many socket. If a peeled
4243                  * off, or connected one does this.. its an error.
4244                  */
4245                 SCTP_INP_RUNLOCK(inp);
4246                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4247                 *error = EINVAL;
4248                 return (NULL);
4249         }
4250         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) ||
4251             (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) {
4252                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) ||
4253                     (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) {
4254                         SCTP_INP_RUNLOCK(inp);
4255                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4256                         *error = EINVAL;
4257                         return (NULL);
4258                 }
4259         }
4260         SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:");
4261 #ifdef SCTP_DEBUG
4262         if (firstaddr) {
4263                 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr);
4264                 switch (firstaddr->sa_family) {
4265 #ifdef INET
4266                 case AF_INET:
4267                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4268                             ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
4269                         break;
4270 #endif
4271 #ifdef INET6
4272                 case AF_INET6:
4273                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4274                             ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port));
4275                         break;
4276 #endif
4277                 default:
4278                         break;
4279                 }
4280         } else {
4281                 SCTPDBG(SCTP_DEBUG_PCB3, "None\n");
4282         }
4283 #endif                          /* SCTP_DEBUG */
4284         switch (firstaddr->sa_family) {
4285 #ifdef INET
4286         case AF_INET:
4287                 {
4288                         struct sockaddr_in *sin;
4289
4290                         sin = (struct sockaddr_in *)firstaddr;
4291                         if ((ntohs(sin->sin_port) == 0) ||
4292                             (sin->sin_addr.s_addr == INADDR_ANY) ||
4293                             (sin->sin_addr.s_addr == INADDR_BROADCAST) ||
4294                             IN_MULTICAST(ntohl(sin->sin_addr.s_addr)) ||
4295                             (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) != 0) &&
4296                             (SCTP_IPV6_V6ONLY(inp) != 0))) {
4297                                 /* Invalid address */
4298                                 SCTP_INP_RUNLOCK(inp);
4299                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4300                                 *error = EINVAL;
4301                                 return (NULL);
4302                         }
4303                         rport = sin->sin_port;
4304                         break;
4305                 }
4306 #endif
4307 #ifdef INET6
4308         case AF_INET6:
4309                 {
4310                         struct sockaddr_in6 *sin6;
4311
4312                         sin6 = (struct sockaddr_in6 *)firstaddr;
4313                         if ((ntohs(sin6->sin6_port) == 0) ||
4314                             IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
4315                             IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr) ||
4316                             ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0)) {
4317                                 /* Invalid address */
4318                                 SCTP_INP_RUNLOCK(inp);
4319                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4320                                 *error = EINVAL;
4321                                 return (NULL);
4322                         }
4323                         rport = sin6->sin6_port;
4324                         break;
4325                 }
4326 #endif
4327         default:
4328                 /* not supported family type */
4329                 SCTP_INP_RUNLOCK(inp);
4330                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4331                 *error = EINVAL;
4332                 return (NULL);
4333         }
4334         SCTP_INP_RUNLOCK(inp);
4335         if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
4336                 /*
4337                  * If you have not performed a bind, then we need to do the
4338                  * ephemeral bind for you.
4339                  */
4340                 if ((err = sctp_inpcb_bind(inp->sctp_socket, NULL, NULL, p))) {
4341                         /* bind error, probably perm */
4342                         *error = err;
4343                         return (NULL);
4344                 }
4345         }
4346         stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb);
4347         if (stcb == NULL) {
4348                 /* out of memory? */
4349                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
4350                 *error = ENOMEM;
4351                 return (NULL);
4352         }
4353         SCTP_INCR_ASOC_COUNT();
4354
4355         memset(stcb, 0, sizeof(*stcb));
4356         asoc = &stcb->asoc;
4357
4358         SCTP_TCB_LOCK_INIT(stcb);
4359         SCTP_TCB_SEND_LOCK_INIT(stcb);
4360         stcb->rport = rport;
4361         /* setup back pointer's */
4362         stcb->sctp_ep = inp;
4363         stcb->sctp_socket = inp->sctp_socket;
4364         if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id, o_streams))) {
4365                 /* failed */
4366                 SCTP_TCB_LOCK_DESTROY(stcb);
4367                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4368                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4369                 SCTP_DECR_ASOC_COUNT();
4370                 *error = err;
4371                 return (NULL);
4372         }
4373         /* and the port */
4374         SCTP_INP_INFO_WLOCK();
4375         SCTP_INP_WLOCK(inp);
4376         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4377                 /* inpcb freed while alloc going on */
4378                 SCTP_TCB_LOCK_DESTROY(stcb);
4379                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4380                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4381                 SCTP_INP_WUNLOCK(inp);
4382                 SCTP_INP_INFO_WUNLOCK();
4383                 SCTP_DECR_ASOC_COUNT();
4384                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4385                 *error = EINVAL;
4386                 return (NULL);
4387         }
4388         SCTP_TCB_LOCK(stcb);
4389
4390         asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb);
4391         /* now that my_vtag is set, add it to the hash */
4392         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
4393         /* put it in the bucket in the vtag hash of assoc's for the system */
4394         LIST_INSERT_HEAD(head, stcb, sctp_asocs);
4395         SCTP_INP_INFO_WUNLOCK();
4396
4397         if (sctp_add_remote_addr(stcb, firstaddr, NULL, port, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC)) {
4398                 /* failure.. memory error? */
4399                 if (asoc->strmout) {
4400                         SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
4401                         asoc->strmout = NULL;
4402                 }
4403                 if (asoc->mapping_array) {
4404                         SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
4405                         asoc->mapping_array = NULL;
4406                 }
4407                 if (asoc->nr_mapping_array) {
4408                         SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
4409                         asoc->nr_mapping_array = NULL;
4410                 }
4411                 SCTP_DECR_ASOC_COUNT();
4412                 SCTP_TCB_UNLOCK(stcb);
4413                 SCTP_TCB_LOCK_DESTROY(stcb);
4414                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4415                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4416                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4417                 SCTP_INP_WUNLOCK(inp);
4418                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4419                 *error = ENOBUFS;
4420                 return (NULL);
4421         }
4422         /* Init all the timers */
4423         SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer);
4424         SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer);
4425         SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer);
4426         SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer);
4427         SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer);
4428         SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer);
4429
4430         LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
4431         /* now file the port under the hash as well */
4432         if (inp->sctp_tcbhash != NULL) {
4433                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
4434                     inp->sctp_hashmark)];
4435                 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
4436         }
4437         if (initialize_auth_params == SCTP_INITIALIZE_AUTH_PARAMS) {
4438                 sctp_initialize_auth_params(inp, stcb);
4439         }
4440         SCTP_INP_WUNLOCK(inp);
4441         SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb);
4442         return (stcb);
4443 }
4444
4445
4446 void
4447 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net)
4448 {
4449         struct sctp_inpcb *inp;
4450         struct sctp_association *asoc;
4451
4452         inp = stcb->sctp_ep;
4453         asoc = &stcb->asoc;
4454         asoc->numnets--;
4455         TAILQ_REMOVE(&asoc->nets, net, sctp_next);
4456         if (net == asoc->primary_destination) {
4457                 /* Reset primary */
4458                 struct sctp_nets *lnet;
4459
4460                 lnet = TAILQ_FIRST(&asoc->nets);
4461                 /*
4462                  * Mobility adaptation Ideally, if deleted destination is
4463                  * the primary, it becomes a fast retransmission trigger by
4464                  * the subsequent SET PRIMARY. (by micchie)
4465                  */
4466                 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
4467                     SCTP_MOBILITY_BASE) ||
4468                     sctp_is_mobility_feature_on(stcb->sctp_ep,
4469                     SCTP_MOBILITY_FASTHANDOFF)) {
4470                         SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n");
4471                         if (asoc->deleted_primary != NULL) {
4472                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n");
4473                                 goto out;
4474                         }
4475                         asoc->deleted_primary = net;
4476                         atomic_add_int(&net->ref_count, 1);
4477                         memset(&net->lastsa, 0, sizeof(net->lastsa));
4478                         memset(&net->lastsv, 0, sizeof(net->lastsv));
4479                         sctp_mobility_feature_on(stcb->sctp_ep,
4480                             SCTP_MOBILITY_PRIM_DELETED);
4481                         sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED,
4482                             stcb->sctp_ep, stcb, NULL);
4483                 }
4484 out:
4485                 /* Try to find a confirmed primary */
4486                 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0);
4487         }
4488         if (net == asoc->last_data_chunk_from) {
4489                 /* Reset primary */
4490                 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets);
4491         }
4492         if (net == asoc->last_control_chunk_from) {
4493                 /* Clear net */
4494                 asoc->last_control_chunk_from = NULL;
4495         }
4496         if (net == stcb->asoc.alternate) {
4497                 sctp_free_remote_addr(stcb->asoc.alternate);
4498                 stcb->asoc.alternate = NULL;
4499         }
4500         sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net,
4501             SCTP_FROM_SCTP_PCB + SCTP_LOC_9);
4502         sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net,
4503             SCTP_FROM_SCTP_PCB + SCTP_LOC_10);
4504         net->dest_state |= SCTP_ADDR_BEING_DELETED;
4505         sctp_free_remote_addr(net);
4506 }
4507
4508 /*
4509  * remove a remote endpoint address from an association, it will fail if the
4510  * address does not exist.
4511  */
4512 int
4513 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
4514 {
4515         /*
4516          * Here we need to remove a remote address. This is quite simple, we
4517          * first find it in the list of address for the association
4518          * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE
4519          * on that item. Note we do not allow it to be removed if there are
4520          * no other addresses.
4521          */
4522         struct sctp_association *asoc;
4523         struct sctp_nets *net, *nnet;
4524
4525         asoc = &stcb->asoc;
4526
4527         /* locate the address */
4528         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
4529                 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
4530                         continue;
4531                 }
4532                 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
4533                     remaddr)) {
4534                         /* we found the guy */
4535                         if (asoc->numnets < 2) {
4536                                 /* Must have at LEAST two remote addresses */
4537                                 return (-1);
4538                         } else {
4539                                 sctp_remove_net(stcb, net);
4540                                 return (0);
4541                         }
4542                 }
4543         }
4544         /* not found. */
4545         return (-2);
4546 }
4547
4548 void
4549 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4550 {
4551         struct sctpvtaghead *chain;
4552         struct sctp_tagblock *twait_block;
4553         int found = 0;
4554         int i;
4555
4556         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4557         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4558                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4559                         if ((twait_block->vtag_block[i].v_tag == tag) &&
4560                             (twait_block->vtag_block[i].lport == lport) &&
4561                             (twait_block->vtag_block[i].rport == rport)) {
4562                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
4563                                 twait_block->vtag_block[i].v_tag = 0;
4564                                 twait_block->vtag_block[i].lport = 0;
4565                                 twait_block->vtag_block[i].rport = 0;
4566                                 found = 1;
4567                                 break;
4568                         }
4569                 }
4570                 if (found)
4571                         break;
4572         }
4573 }
4574
4575 int
4576 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4577 {
4578         struct sctpvtaghead *chain;
4579         struct sctp_tagblock *twait_block;
4580         int found = 0;
4581         int i;
4582
4583         SCTP_INP_INFO_WLOCK();
4584         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4585         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4586                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4587                         if ((twait_block->vtag_block[i].v_tag == tag) &&
4588                             (twait_block->vtag_block[i].lport == lport) &&
4589                             (twait_block->vtag_block[i].rport == rport)) {
4590                                 found = 1;
4591                                 break;
4592                         }
4593                 }
4594                 if (found)
4595                         break;
4596         }
4597         SCTP_INP_INFO_WUNLOCK();
4598         return (found);
4599 }
4600
4601
4602 void
4603 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport)
4604 {
4605         struct sctpvtaghead *chain;
4606         struct sctp_tagblock *twait_block;
4607         struct timeval now;
4608         int set, i;
4609
4610         if (time == 0) {
4611                 /* Its disabled */
4612                 return;
4613         }
4614         (void)SCTP_GETTIME_TIMEVAL(&now);
4615         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4616         set = 0;
4617         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4618                 /* Block(s) present, lets find space, and expire on the fly */
4619                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4620                         if ((twait_block->vtag_block[i].v_tag == 0) &&
4621                             !set) {
4622                                 twait_block->vtag_block[i].tv_sec_at_expire =
4623                                     now.tv_sec + time;
4624                                 twait_block->vtag_block[i].v_tag = tag;
4625                                 twait_block->vtag_block[i].lport = lport;
4626                                 twait_block->vtag_block[i].rport = rport;
4627                                 set = 1;
4628                         } else if ((twait_block->vtag_block[i].v_tag) &&
4629                             ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) {
4630                                 /* Audit expires this guy */
4631                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
4632                                 twait_block->vtag_block[i].v_tag = 0;
4633                                 twait_block->vtag_block[i].lport = 0;
4634                                 twait_block->vtag_block[i].rport = 0;
4635                                 if (set == 0) {
4636                                         /* Reuse it for my new tag */
4637                                         twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time;
4638                                         twait_block->vtag_block[i].v_tag = tag;
4639                                         twait_block->vtag_block[i].lport = lport;
4640                                         twait_block->vtag_block[i].rport = rport;
4641                                         set = 1;
4642                                 }
4643                         }
4644                 }
4645                 if (set) {
4646                         /*
4647                          * We only do up to the block where we can place our
4648                          * tag for audits
4649                          */
4650                         break;
4651                 }
4652         }
4653         /* Need to add a new block to chain */
4654         if (!set) {
4655                 SCTP_MALLOC(twait_block, struct sctp_tagblock *,
4656                     sizeof(struct sctp_tagblock), SCTP_M_TIMW);
4657                 if (twait_block == NULL) {
4658                         return;
4659                 }
4660                 memset(twait_block, 0, sizeof(struct sctp_tagblock));
4661                 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
4662                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time;
4663                 twait_block->vtag_block[0].v_tag = tag;
4664                 twait_block->vtag_block[0].lport = lport;
4665                 twait_block->vtag_block[0].rport = rport;
4666         }
4667 }
4668
4669 void
4670 sctp_clean_up_stream(struct sctp_tcb *stcb, struct sctp_readhead *rh)
4671 {
4672         struct sctp_tmit_chunk *chk, *nchk;
4673         struct sctp_queued_to_read *control, *ncontrol;
4674
4675         TAILQ_FOREACH_SAFE(control, rh, next_instrm, ncontrol) {
4676                 TAILQ_REMOVE(rh, control, next_instrm);
4677                 control->on_strm_q = 0;
4678                 if (control->on_read_q == 0) {
4679                         sctp_free_remote_addr(control->whoFrom);
4680                         if (control->data) {
4681                                 sctp_m_freem(control->data);
4682                                 control->data = NULL;
4683                         }
4684                 }
4685                 /* Reassembly free? */
4686                 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) {
4687                         TAILQ_REMOVE(&control->reasm, chk, sctp_next);
4688                         if (chk->data) {
4689                                 sctp_m_freem(chk->data);
4690                                 chk->data = NULL;
4691                         }
4692                         if (chk->holds_key_ref)
4693                                 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
4694                         sctp_free_remote_addr(chk->whoTo);
4695                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4696                         SCTP_DECR_CHK_COUNT();
4697                         /* sa_ignore FREED_MEMORY */
4698                 }
4699                 /*
4700                  * We don't free the address here since all the net's were
4701                  * freed above.
4702                  */
4703                 if (control->on_read_q == 0) {
4704                         sctp_free_a_readq(stcb, control);
4705                 }
4706         }
4707 }
4708
4709 /*-
4710  * Free the association after un-hashing the remote port. This
4711  * function ALWAYS returns holding NO LOCK on the stcb. It DOES
4712  * expect that the input to this function IS a locked TCB.
4713  * It will return 0, if it did NOT destroy the association (instead
4714  * it unlocks it. It will return NON-zero if it either destroyed the
4715  * association OR the association is already destroyed.
4716  */
4717 int
4718 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location)
4719 {
4720         int i;
4721         struct sctp_association *asoc;
4722         struct sctp_nets *net, *nnet;
4723         struct sctp_laddr *laddr, *naddr;
4724         struct sctp_tmit_chunk *chk, *nchk;
4725         struct sctp_asconf_addr *aparam, *naparam;
4726         struct sctp_asconf_ack *aack, *naack;
4727         struct sctp_stream_reset_list *strrst, *nstrrst;
4728         struct sctp_queued_to_read *sq, *nsq;
4729         struct sctp_stream_queue_pending *sp, *nsp;
4730         sctp_sharedkey_t *shared_key, *nshared_key;
4731         struct socket *so;
4732
4733         /* first, lets purge the entry from the hash table. */
4734
4735 #ifdef SCTP_LOG_CLOSING
4736         sctp_log_closing(inp, stcb, 6);
4737 #endif
4738         if (stcb->asoc.state == 0) {
4739 #ifdef SCTP_LOG_CLOSING
4740                 sctp_log_closing(inp, NULL, 7);
4741 #endif
4742                 /* there is no asoc, really TSNH :-0 */
4743                 return (1);
4744         }
4745         SCTP_TCB_SEND_LOCK(stcb);
4746         if (stcb->asoc.alternate) {
4747                 sctp_free_remote_addr(stcb->asoc.alternate);
4748                 stcb->asoc.alternate = NULL;
4749         }
4750         /* TEMP CODE */
4751         if (stcb->freed_from_where == 0) {
4752                 /* Only record the first place free happened from */
4753                 stcb->freed_from_where = from_location;
4754         }
4755         /* TEMP CODE */
4756
4757         asoc = &stcb->asoc;
4758         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4759             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4760                 /* nothing around */
4761                 so = NULL;
4762         else
4763                 so = inp->sctp_socket;
4764
4765         /*
4766          * We used timer based freeing if a reader or writer is in the way.
4767          * So we first check if we are actually being called from a timer,
4768          * if so we abort early if a reader or writer is still in the way.
4769          */
4770         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
4771             (from_inpcbfree == SCTP_NORMAL_PROC)) {
4772                 /*
4773                  * is it the timer driving us? if so are the reader/writers
4774                  * gone?
4775                  */
4776                 if (stcb->asoc.refcnt) {
4777                         /* nope, reader or writer in the way */
4778                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4779                         /* no asoc destroyed */
4780                         SCTP_TCB_SEND_UNLOCK(stcb);
4781                         SCTP_TCB_UNLOCK(stcb);
4782 #ifdef SCTP_LOG_CLOSING
4783                         sctp_log_closing(inp, stcb, 8);
4784 #endif
4785                         return (0);
4786                 }
4787         }
4788         /* Now clean up any other timers */
4789         sctp_stop_association_timers(stcb, false);
4790         /* Now the read queue needs to be cleaned up (only once) */
4791         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) {
4792                 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_ABOUT_TO_BE_FREED);
4793                 SCTP_INP_READ_LOCK(inp);
4794                 TAILQ_FOREACH(sq, &inp->read_queue, next) {
4795                         if (sq->stcb == stcb) {
4796                                 sq->do_not_ref_stcb = 1;
4797                                 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
4798                                 /*
4799                                  * If there is no end, there never will be
4800                                  * now.
4801                                  */
4802                                 if (sq->end_added == 0) {
4803                                         /* Held for PD-API clear that. */
4804                                         sq->pdapi_aborted = 1;
4805                                         sq->held_length = 0;
4806                                         if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) {
4807                                                 /*
4808                                                  * Need to add a PD-API
4809                                                  * aborted indication.
4810                                                  * Setting the control_pdapi
4811                                                  * assures that it will be
4812                                                  * added right after this
4813                                                  * msg.
4814                                                  */
4815                                                 uint32_t strseq;
4816
4817                                                 stcb->asoc.control_pdapi = sq;
4818                                                 strseq = (sq->sinfo_stream << 16) | (sq->mid & 0x0000ffff);
4819                                                 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION,
4820                                                     stcb,
4821                                                     SCTP_PARTIAL_DELIVERY_ABORTED,
4822                                                     (void *)&strseq,
4823                                                     SCTP_SO_LOCKED);
4824                                                 stcb->asoc.control_pdapi = NULL;
4825                                         }
4826                                 }
4827                                 /* Add an end to wake them */
4828                                 sq->end_added = 1;
4829                         }
4830                 }
4831                 SCTP_INP_READ_UNLOCK(inp);
4832                 if (stcb->block_entry) {
4833                         SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET);
4834                         stcb->block_entry->error = ECONNRESET;
4835                         stcb->block_entry = NULL;
4836                 }
4837         }
4838         if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) {
4839                 /*
4840                  * Someone holds a reference OR the socket is unaccepted
4841                  * yet.
4842                  */
4843                 if ((stcb->asoc.refcnt) ||
4844                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4845                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) {
4846                         SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE);
4847                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4848                 }
4849                 SCTP_TCB_SEND_UNLOCK(stcb);
4850                 SCTP_TCB_UNLOCK(stcb);
4851                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4852                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4853                         /* nothing around */
4854                         so = NULL;
4855                 if (so) {
4856                         /* Wake any reader/writers */
4857                         sctp_sorwakeup(inp, so);
4858                         sctp_sowwakeup(inp, so);
4859                 }
4860
4861 #ifdef SCTP_LOG_CLOSING
4862                 sctp_log_closing(inp, stcb, 9);
4863 #endif
4864                 /* no asoc destroyed */
4865                 return (0);
4866         }
4867 #ifdef SCTP_LOG_CLOSING
4868         sctp_log_closing(inp, stcb, 10);
4869 #endif
4870         /*
4871          * When I reach here, no others want to kill the assoc yet.. and I
4872          * own the lock. Now its possible an abort comes in when I do the
4873          * lock exchange below to grab all the locks to do the final take
4874          * out. to prevent this we increment the count, which will start a
4875          * timer and blow out above thus assuring us that we hold exclusive
4876          * killing of the asoc. Note that after getting back the TCB lock we
4877          * will go ahead and increment the counter back up and stop any
4878          * timer a passing stranger may have started :-S
4879          */
4880         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4881                 atomic_add_int(&stcb->asoc.refcnt, 1);
4882
4883                 SCTP_TCB_SEND_UNLOCK(stcb);
4884                 SCTP_TCB_UNLOCK(stcb);
4885                 SCTP_INP_INFO_WLOCK();
4886                 SCTP_INP_WLOCK(inp);
4887                 SCTP_TCB_LOCK(stcb);
4888                 SCTP_TCB_SEND_LOCK(stcb);
4889         }
4890         /* Double check the GONE flag */
4891         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4892             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4893                 /* nothing around */
4894                 so = NULL;
4895
4896         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
4897             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
4898                 /*
4899                  * For TCP type we need special handling when we are
4900                  * connected. We also include the peel'ed off ones to.
4901                  */
4902                 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
4903                         inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
4904                         inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED;
4905                         if (so) {
4906                                 SOCKBUF_LOCK(&so->so_rcv);
4907                                 so->so_state &= ~(SS_ISCONNECTING |
4908                                     SS_ISDISCONNECTING |
4909                                     SS_ISCONFIRMING |
4910                                     SS_ISCONNECTED);
4911                                 so->so_state |= SS_ISDISCONNECTED;
4912                                 socantrcvmore_locked(so);
4913                                 socantsendmore(so);
4914                                 sctp_sowwakeup(inp, so);
4915                                 sctp_sorwakeup(inp, so);
4916                                 SCTP_SOWAKEUP(so);
4917                         }
4918                 }
4919         }
4920
4921         /*
4922          * Make it invalid too, that way if its about to run it will abort
4923          * and return.
4924          */
4925         /* re-increment the lock */
4926         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4927                 atomic_add_int(&stcb->asoc.refcnt, -1);
4928         }
4929         if (stcb->asoc.refcnt) {
4930                 SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE);
4931                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4932                 if (from_inpcbfree == SCTP_NORMAL_PROC) {
4933                         SCTP_INP_INFO_WUNLOCK();
4934                         SCTP_INP_WUNLOCK(inp);
4935                 }
4936                 SCTP_TCB_SEND_UNLOCK(stcb);
4937                 SCTP_TCB_UNLOCK(stcb);
4938                 return (0);
4939         }
4940         asoc->state = 0;
4941         if (inp->sctp_tcbhash) {
4942                 LIST_REMOVE(stcb, sctp_tcbhash);
4943         }
4944         if (stcb->asoc.in_asocid_hash) {
4945                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4946         }
4947         /* Now lets remove it from the list of ALL associations in the EP */
4948         LIST_REMOVE(stcb, sctp_tcblist);
4949         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4950                 SCTP_INP_INCR_REF(inp);
4951                 SCTP_INP_WUNLOCK(inp);
4952         }
4953         /* pull from vtag hash */
4954         LIST_REMOVE(stcb, sctp_asocs);
4955         sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait),
4956             inp->sctp_lport, stcb->rport);
4957
4958         /*
4959          * Now restop the timers to be sure this is paranoia at is finest!
4960          */
4961         sctp_stop_association_timers(stcb, true);
4962
4963         /*
4964          * The chunk lists and such SHOULD be empty but we check them just
4965          * in case.
4966          */
4967         /* anything on the wheel needs to be removed */
4968         for (i = 0; i < asoc->streamoutcnt; i++) {
4969                 struct sctp_stream_out *outs;
4970
4971                 outs = &asoc->strmout[i];
4972                 /* now clean up any chunks here */
4973                 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) {
4974                         atomic_subtract_int(&asoc->stream_queue_cnt, 1);
4975                         TAILQ_REMOVE(&outs->outqueue, sp, next);
4976                         stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, outs, sp, 1);
4977                         sctp_free_spbufspace(stcb, asoc, sp);
4978                         if (sp->data) {
4979                                 if (so) {
4980                                         /* Still an open socket - report */
4981                                         sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb,
4982                                             0, (void *)sp, SCTP_SO_LOCKED);
4983                                 }
4984                                 if (sp->data) {
4985                                         sctp_m_freem(sp->data);
4986                                         sp->data = NULL;
4987                                         sp->tail_mbuf = NULL;
4988                                         sp->length = 0;
4989                                 }
4990                         }
4991                         if (sp->net) {
4992                                 sctp_free_remote_addr(sp->net);
4993                                 sp->net = NULL;
4994                         }
4995                         sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
4996                 }
4997         }
4998         /* sa_ignore FREED_MEMORY */
4999         TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) {
5000                 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp);
5001                 SCTP_FREE(strrst, SCTP_M_STRESET);
5002         }
5003         TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) {
5004                 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
5005                 if (sq->data) {
5006                         sctp_m_freem(sq->data);
5007                         sq->data = NULL;
5008                 }
5009                 sctp_free_remote_addr(sq->whoFrom);
5010                 sq->whoFrom = NULL;
5011                 sq->stcb = NULL;
5012                 /* Free the ctl entry */
5013                 sctp_free_a_readq(stcb, sq);
5014                 /* sa_ignore FREED_MEMORY */
5015         }
5016         TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) {
5017                 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next);
5018                 if (chk->data) {
5019                         sctp_m_freem(chk->data);
5020                         chk->data = NULL;
5021                 }
5022                 if (chk->holds_key_ref)
5023                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5024                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5025                 SCTP_DECR_CHK_COUNT();
5026                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1);
5027                 asoc->free_chunk_cnt--;
5028                 /* sa_ignore FREED_MEMORY */
5029         }
5030         /* pending send queue SHOULD be empty */
5031         TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
5032                 if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) {
5033                         asoc->strmout[chk->rec.data.sid].chunks_on_queues--;
5034 #ifdef INVARIANTS
5035                 } else {
5036                         panic("No chunks on the queues for sid %u.", chk->rec.data.sid);
5037 #endif
5038                 }
5039                 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
5040                 if (chk->data) {
5041                         if (so) {
5042                                 /* Still a socket? */
5043                                 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb,
5044                                     0, chk, SCTP_SO_LOCKED);
5045                         }
5046                         if (chk->data) {
5047                                 sctp_m_freem(chk->data);
5048                                 chk->data = NULL;
5049                         }
5050                 }
5051                 if (chk->holds_key_ref)
5052                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5053                 if (chk->whoTo) {
5054                         sctp_free_remote_addr(chk->whoTo);
5055                         chk->whoTo = NULL;
5056                 }
5057                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5058                 SCTP_DECR_CHK_COUNT();
5059                 /* sa_ignore FREED_MEMORY */
5060         }
5061         /* sent queue SHOULD be empty */
5062         TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) {
5063                 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) {
5064                         if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) {
5065                                 asoc->strmout[chk->rec.data.sid].chunks_on_queues--;
5066 #ifdef INVARIANTS
5067                         } else {
5068                                 panic("No chunks on the queues for sid %u.", chk->rec.data.sid);
5069 #endif
5070                         }
5071                 }
5072                 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
5073                 if (chk->data) {
5074                         if (so) {
5075                                 /* Still a socket? */
5076                                 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb,
5077                                     0, chk, SCTP_SO_LOCKED);
5078                         }
5079                         if (chk->data) {
5080                                 sctp_m_freem(chk->data);
5081                                 chk->data = NULL;
5082                         }
5083                 }
5084                 if (chk->holds_key_ref)
5085                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5086                 sctp_free_remote_addr(chk->whoTo);
5087                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5088                 SCTP_DECR_CHK_COUNT();
5089                 /* sa_ignore FREED_MEMORY */
5090         }
5091 #ifdef INVARIANTS
5092         for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
5093                 if (stcb->asoc.strmout[i].chunks_on_queues > 0) {
5094                         panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i);
5095                 }
5096         }
5097 #endif
5098         /* control queue MAY not be empty */
5099         TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
5100                 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
5101                 if (chk->data) {
5102                         sctp_m_freem(chk->data);
5103                         chk->data = NULL;
5104                 }
5105                 if (chk->holds_key_ref)
5106                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5107                 sctp_free_remote_addr(chk->whoTo);
5108                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5109                 SCTP_DECR_CHK_COUNT();
5110                 /* sa_ignore FREED_MEMORY */
5111         }
5112         /* ASCONF queue MAY not be empty */
5113         TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
5114                 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
5115                 if (chk->data) {
5116                         sctp_m_freem(chk->data);
5117                         chk->data = NULL;
5118                 }
5119                 if (chk->holds_key_ref)
5120                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5121                 sctp_free_remote_addr(chk->whoTo);
5122                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5123                 SCTP_DECR_CHK_COUNT();
5124                 /* sa_ignore FREED_MEMORY */
5125         }
5126         if (asoc->mapping_array) {
5127                 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
5128                 asoc->mapping_array = NULL;
5129         }
5130         if (asoc->nr_mapping_array) {
5131                 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
5132                 asoc->nr_mapping_array = NULL;
5133         }
5134         /* the stream outs */
5135         if (asoc->strmout) {
5136                 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
5137                 asoc->strmout = NULL;
5138         }
5139         asoc->strm_realoutsize = asoc->streamoutcnt = 0;
5140         if (asoc->strmin) {
5141                 for (i = 0; i < asoc->streamincnt; i++) {
5142                         sctp_clean_up_stream(stcb, &asoc->strmin[i].inqueue);
5143                         sctp_clean_up_stream(stcb, &asoc->strmin[i].uno_inqueue);
5144                 }
5145                 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
5146                 asoc->strmin = NULL;
5147         }
5148         asoc->streamincnt = 0;
5149         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
5150 #ifdef INVARIANTS
5151                 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) {
5152                         panic("no net's left alloc'ed, or list points to itself");
5153                 }
5154 #endif
5155                 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
5156                 sctp_free_remote_addr(net);
5157         }
5158         LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) {
5159                 /* sa_ignore FREED_MEMORY */
5160                 sctp_remove_laddr(laddr);
5161         }
5162
5163         /* pending asconf (address) parameters */
5164         TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) {
5165                 /* sa_ignore FREED_MEMORY */
5166                 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
5167                 SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
5168         }
5169         TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) {
5170                 /* sa_ignore FREED_MEMORY */
5171                 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next);
5172                 if (aack->data != NULL) {
5173                         sctp_m_freem(aack->data);
5174                 }
5175                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack);
5176         }
5177         /* clean up auth stuff */
5178         if (asoc->local_hmacs)
5179                 sctp_free_hmaclist(asoc->local_hmacs);
5180         if (asoc->peer_hmacs)
5181                 sctp_free_hmaclist(asoc->peer_hmacs);
5182
5183         if (asoc->local_auth_chunks)
5184                 sctp_free_chunklist(asoc->local_auth_chunks);
5185         if (asoc->peer_auth_chunks)
5186                 sctp_free_chunklist(asoc->peer_auth_chunks);
5187
5188         sctp_free_authinfo(&asoc->authinfo);
5189
5190         LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) {
5191                 LIST_REMOVE(shared_key, next);
5192                 sctp_free_sharedkey(shared_key);
5193                 /* sa_ignore FREED_MEMORY */
5194         }
5195
5196         /* Insert new items here :> */
5197
5198         /* Get rid of LOCK */
5199         SCTP_TCB_SEND_UNLOCK(stcb);
5200         SCTP_TCB_UNLOCK(stcb);
5201         SCTP_TCB_LOCK_DESTROY(stcb);
5202         SCTP_TCB_SEND_LOCK_DESTROY(stcb);
5203         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5204                 SCTP_INP_INFO_WUNLOCK();
5205                 SCTP_INP_RLOCK(inp);
5206         }
5207 #ifdef SCTP_TRACK_FREED_ASOCS
5208         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5209                 /* now clean up the tasoc itself */
5210                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5211                 SCTP_DECR_ASOC_COUNT();
5212         } else {
5213                 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist);
5214         }
5215 #else
5216         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5217         SCTP_DECR_ASOC_COUNT();
5218 #endif
5219         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5220                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5221                         /*
5222                          * If its NOT the inp_free calling us AND sctp_close
5223                          * as been called, we call back...
5224                          */
5225                         SCTP_INP_RUNLOCK(inp);
5226                         /*
5227                          * This will start the kill timer (if we are the
5228                          * last one) since we hold an increment yet. But
5229                          * this is the only safe way to do this since
5230                          * otherwise if the socket closes at the same time
5231                          * we are here we might collide in the cleanup.
5232                          */
5233                         sctp_inpcb_free(inp,
5234                             SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE,
5235                             SCTP_CALLED_DIRECTLY_NOCMPSET);
5236                         SCTP_INP_DECR_REF(inp);
5237                 } else {
5238                         /* The socket is still open. */
5239                         SCTP_INP_DECR_REF(inp);
5240                         SCTP_INP_RUNLOCK(inp);
5241                 }
5242         }
5243         /* destroyed the asoc */
5244 #ifdef SCTP_LOG_CLOSING
5245         sctp_log_closing(inp, NULL, 11);
5246 #endif
5247         return (1);
5248 }
5249
5250
5251
5252 /*
5253  * determine if a destination is "reachable" based upon the addresses bound
5254  * to the current endpoint (e.g. only v4 or v6 currently bound)
5255  */
5256 /*
5257  * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use
5258  * assoc level v4/v6 flags, as the assoc *may* not have the same address
5259  * types bound as its endpoint
5260  */
5261 int
5262 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
5263 {
5264         struct sctp_inpcb *inp;
5265         int answer;
5266
5267         /*
5268          * No locks here, the TCB, in all cases is already locked and an
5269          * assoc is up. There is either a INP lock by the caller applied (in
5270          * asconf case when deleting an address) or NOT in the HB case,
5271          * however if HB then the INP increment is up and the INP will not
5272          * be removed (on top of the fact that we have a TCB lock). So we
5273          * only want to read the sctp_flags, which is either bound-all or
5274          * not.. no protection needed since once an assoc is up you can't be
5275          * changing your binding.
5276          */
5277         inp = stcb->sctp_ep;
5278         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5279                 /* if bound all, destination is not restricted */
5280                 /*
5281                  * RRS: Question during lock work: Is this correct? If you
5282                  * are bound-all you still might need to obey the V4--V6
5283                  * flags??? IMO this bound-all stuff needs to be removed!
5284                  */
5285                 return (1);
5286         }
5287         /* NOTE: all "scope" checks are done when local addresses are added */
5288         switch (destaddr->sa_family) {
5289 #ifdef INET6
5290         case AF_INET6:
5291                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
5292                 break;
5293 #endif
5294 #ifdef INET
5295         case AF_INET:
5296                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
5297                 break;
5298 #endif
5299         default:
5300                 /* invalid family, so it's unreachable */
5301                 answer = 0;
5302                 break;
5303         }
5304         return (answer);
5305 }
5306
5307 /*
5308  * update the inp_vflags on an endpoint
5309  */
5310 static void
5311 sctp_update_ep_vflag(struct sctp_inpcb *inp)
5312 {
5313         struct sctp_laddr *laddr;
5314
5315         /* first clear the flag */
5316         inp->ip_inp.inp.inp_vflag = 0;
5317         /* set the flag based on addresses on the ep list */
5318         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5319                 if (laddr->ifa == NULL) {
5320                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
5321                             __func__);
5322                         continue;
5323                 }
5324
5325                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
5326                         continue;
5327                 }
5328                 switch (laddr->ifa->address.sa.sa_family) {
5329 #ifdef INET6
5330                 case AF_INET6:
5331                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5332                         break;
5333 #endif
5334 #ifdef INET
5335                 case AF_INET:
5336                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5337                         break;
5338 #endif
5339                 default:
5340                         break;
5341                 }
5342         }
5343 }
5344
5345 /*
5346  * Add the address to the endpoint local address list There is nothing to be
5347  * done if we are bound to all addresses
5348  */
5349 void
5350 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action)
5351 {
5352         struct sctp_laddr *laddr;
5353         struct sctp_tcb *stcb;
5354         int fnd, error = 0;
5355
5356         fnd = 0;
5357
5358         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5359                 /* You are already bound to all. You have it already */
5360                 return;
5361         }
5362 #ifdef INET6
5363         if (ifa->address.sa.sa_family == AF_INET6) {
5364                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5365                         /* Can't bind a non-useable addr. */
5366                         return;
5367                 }
5368         }
5369 #endif
5370         /* first, is it already present? */
5371         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5372                 if (laddr->ifa == ifa) {
5373                         fnd = 1;
5374                         break;
5375                 }
5376         }
5377
5378         if (fnd == 0) {
5379                 /* Not in the ep list */
5380                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action);
5381                 if (error != 0)
5382                         return;
5383                 inp->laddr_count++;
5384                 /* update inp_vflag flags */
5385                 switch (ifa->address.sa.sa_family) {
5386 #ifdef INET6
5387                 case AF_INET6:
5388                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5389                         break;
5390 #endif
5391 #ifdef INET
5392                 case AF_INET:
5393                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5394                         break;
5395 #endif
5396                 default:
5397                         break;
5398                 }
5399                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5400                         sctp_add_local_addr_restricted(stcb, ifa);
5401                 }
5402         }
5403         return;
5404 }
5405
5406
5407 /*
5408  * select a new (hopefully reachable) destination net (should only be used
5409  * when we deleted an ep addr that is the only usable source address to reach
5410  * the destination net)
5411  */
5412 static void
5413 sctp_select_primary_destination(struct sctp_tcb *stcb)
5414 {
5415         struct sctp_nets *net;
5416
5417         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5418                 /* for now, we'll just pick the first reachable one we find */
5419                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
5420                         continue;
5421                 if (sctp_destination_is_reachable(stcb,
5422                     (struct sockaddr *)&net->ro._l_addr)) {
5423                         /* found a reachable destination */
5424                         stcb->asoc.primary_destination = net;
5425                 }
5426         }
5427         /* I can't there from here! ...we're gonna die shortly... */
5428 }
5429
5430
5431 /*
5432  * Delete the address from the endpoint local address list. There is nothing
5433  * to be done if we are bound to all addresses
5434  */
5435 void
5436 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
5437 {
5438         struct sctp_laddr *laddr;
5439         int fnd;
5440
5441         fnd = 0;
5442         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5443                 /* You are already bound to all. You have it already */
5444                 return;
5445         }
5446         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5447                 if (laddr->ifa == ifa) {
5448                         fnd = 1;
5449                         break;
5450                 }
5451         }
5452         if (fnd && (inp->laddr_count < 2)) {
5453                 /* can't delete unless there are at LEAST 2 addresses */
5454                 return;
5455         }
5456         if (fnd) {
5457                 /*
5458                  * clean up any use of this address go through our
5459                  * associations and clear any last_used_address that match
5460                  * this one for each assoc, see if a new primary_destination
5461                  * is needed
5462                  */
5463                 struct sctp_tcb *stcb;
5464
5465                 /* clean up "next_addr_touse" */
5466                 if (inp->next_addr_touse == laddr)
5467                         /* delete this address */
5468                         inp->next_addr_touse = NULL;
5469
5470                 /* clean up "last_used_address" */
5471                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5472                         struct sctp_nets *net;
5473
5474                         SCTP_TCB_LOCK(stcb);
5475                         if (stcb->asoc.last_used_address == laddr)
5476                                 /* delete this address */
5477                                 stcb->asoc.last_used_address = NULL;
5478                         /*
5479                          * Now spin through all the nets and purge any ref
5480                          * to laddr
5481                          */
5482                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5483                                 if (net->ro._s_addr == laddr->ifa) {
5484                                         /* Yep, purge src address selected */
5485                                         sctp_rtentry_t *rt;
5486
5487                                         /* delete this address if cached */
5488                                         rt = net->ro.ro_rt;
5489                                         if (rt != NULL) {
5490                                                 RTFREE(rt);
5491                                                 net->ro.ro_rt = NULL;
5492                                         }
5493                                         sctp_free_ifa(net->ro._s_addr);
5494                                         net->ro._s_addr = NULL;
5495                                         net->src_addr_selected = 0;
5496                                 }
5497                         }
5498                         SCTP_TCB_UNLOCK(stcb);
5499                 }               /* for each tcb */
5500                 /* remove it from the ep list */
5501                 sctp_remove_laddr(laddr);
5502                 inp->laddr_count--;
5503                 /* update inp_vflag flags */
5504                 sctp_update_ep_vflag(inp);
5505         }
5506         return;
5507 }
5508
5509 /*
5510  * Add the address to the TCB local address restricted list.
5511  * This is a "pending" address list (eg. addresses waiting for an
5512  * ASCONF-ACK response) and cannot be used as a valid source address.
5513  */
5514 void
5515 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5516 {
5517         struct sctp_laddr *laddr;
5518         struct sctpladdr *list;
5519
5520         /*
5521          * Assumes TCB is locked.. and possibly the INP. May need to
5522          * confirm/fix that if we need it and is not the case.
5523          */
5524         list = &stcb->asoc.sctp_restricted_addrs;
5525
5526 #ifdef INET6
5527         if (ifa->address.sa.sa_family == AF_INET6) {
5528                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5529                         /* Can't bind a non-existent addr. */
5530                         return;
5531                 }
5532         }
5533 #endif
5534         /* does the address already exist? */
5535         LIST_FOREACH(laddr, list, sctp_nxt_addr) {
5536                 if (laddr->ifa == ifa) {
5537                         return;
5538                 }
5539         }
5540
5541         /* add to the list */
5542         (void)sctp_insert_laddr(list, ifa, 0);
5543         return;
5544 }
5545
5546 /*
5547  * Remove a local address from the TCB local address restricted list
5548  */
5549 void
5550 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5551 {
5552         struct sctp_inpcb *inp;
5553         struct sctp_laddr *laddr;
5554
5555         /*
5556          * This is called by asconf work. It is assumed that a) The TCB is
5557          * locked and b) The INP is locked. This is true in as much as I can
5558          * trace through the entry asconf code where I did these locks.
5559          * Again, the ASCONF code is a bit different in that it does lock
5560          * the INP during its work often times. This must be since we don't
5561          * want other proc's looking up things while what they are looking
5562          * up is changing :-D
5563          */
5564
5565         inp = stcb->sctp_ep;
5566         /* if subset bound and don't allow ASCONF's, can't delete last */
5567         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
5568             sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
5569                 if (stcb->sctp_ep->laddr_count < 2) {
5570                         /* can't delete last address */
5571                         return;
5572                 }
5573         }
5574         LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
5575                 /* remove the address if it exists */
5576                 if (laddr->ifa == NULL)
5577                         continue;
5578                 if (laddr->ifa == ifa) {
5579                         sctp_remove_laddr(laddr);
5580                         return;
5581                 }
5582         }
5583
5584         /* address not found! */
5585         return;
5586 }
5587
5588 /* sysctl */
5589 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
5590 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
5591
5592 #if defined(SCTP_MCORE_INPUT) && defined(SMP)
5593 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL;
5594 int *sctp_cpuarry = NULL;
5595
5596 void
5597 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use)
5598 {
5599         /* Queue a packet to a processor for the specified core */
5600         struct sctp_mcore_queue *qent;
5601         struct sctp_mcore_ctrl *wkq;
5602         int need_wake = 0;
5603
5604         if (sctp_mcore_workers == NULL) {
5605                 /* Something went way bad during setup */
5606                 sctp_input_with_port(m, off, 0);
5607                 return;
5608         }
5609         SCTP_MALLOC(qent, struct sctp_mcore_queue *,
5610             (sizeof(struct sctp_mcore_queue)),
5611             SCTP_M_MCORE);
5612         if (qent == NULL) {
5613                 /* This is trouble  */
5614                 sctp_input_with_port(m, off, 0);
5615                 return;
5616         }
5617         qent->vn = curvnet;
5618         qent->m = m;
5619         qent->off = off;
5620         qent->v6 = 0;
5621         wkq = &sctp_mcore_workers[cpu_to_use];
5622         SCTP_MCORE_QLOCK(wkq);
5623
5624         TAILQ_INSERT_TAIL(&wkq->que, qent, next);
5625         if (wkq->running == 0) {
5626                 need_wake = 1;
5627         }
5628         SCTP_MCORE_QUNLOCK(wkq);
5629         if (need_wake) {
5630                 wakeup(&wkq->running);
5631         }
5632 }
5633
5634 static void
5635 sctp_mcore_thread(void *arg)
5636 {
5637
5638         struct sctp_mcore_ctrl *wkq;
5639         struct sctp_mcore_queue *qent;
5640
5641         wkq = (struct sctp_mcore_ctrl *)arg;
5642         struct mbuf *m;
5643         int off, v6;
5644
5645         /* Wait for first tickle */
5646         SCTP_MCORE_LOCK(wkq);
5647         wkq->running = 0;
5648         msleep(&wkq->running,
5649             &wkq->core_mtx,
5650             0, "wait for pkt", 0);
5651         SCTP_MCORE_UNLOCK(wkq);
5652
5653         /* Bind to our cpu */
5654         thread_lock(curthread);
5655         sched_bind(curthread, wkq->cpuid);
5656         thread_unlock(curthread);
5657
5658         /* Now lets start working */
5659         SCTP_MCORE_LOCK(wkq);
5660         /* Now grab lock and go */
5661         for (;;) {
5662                 SCTP_MCORE_QLOCK(wkq);
5663 skip_sleep:
5664                 wkq->running = 1;
5665                 qent = TAILQ_FIRST(&wkq->que);
5666                 if (qent) {
5667                         TAILQ_REMOVE(&wkq->que, qent, next);
5668                         SCTP_MCORE_QUNLOCK(wkq);
5669                         CURVNET_SET(qent->vn);
5670                         m = qent->m;
5671                         off = qent->off;
5672                         v6 = qent->v6;
5673                         SCTP_FREE(qent, SCTP_M_MCORE);
5674                         if (v6 == 0) {
5675                                 sctp_input_with_port(m, off, 0);
5676                         } else {
5677                                 SCTP_PRINTF("V6 not yet supported\n");
5678                                 sctp_m_freem(m);
5679                         }
5680                         CURVNET_RESTORE();
5681                         SCTP_MCORE_QLOCK(wkq);
5682                 }
5683                 wkq->running = 0;
5684                 if (!TAILQ_EMPTY(&wkq->que)) {
5685                         goto skip_sleep;
5686                 }
5687                 SCTP_MCORE_QUNLOCK(wkq);
5688                 msleep(&wkq->running,
5689                     &wkq->core_mtx,
5690                     0, "wait for pkt", 0);
5691         }
5692 }
5693
5694 static void
5695 sctp_startup_mcore_threads(void)
5696 {
5697         int i, cpu;
5698
5699         if (mp_ncpus == 1)
5700                 return;
5701
5702         if (sctp_mcore_workers != NULL) {
5703                 /*
5704                  * Already been here in some previous vnet?
5705                  */
5706                 return;
5707         }
5708         SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *,
5709             ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)),
5710             SCTP_M_MCORE);
5711         if (sctp_mcore_workers == NULL) {
5712                 /* TSNH I hope */
5713                 return;
5714         }
5715         memset(sctp_mcore_workers, 0, ((mp_maxid + 1) *
5716             sizeof(struct sctp_mcore_ctrl)));
5717         /* Init the structures */
5718         for (i = 0; i <= mp_maxid; i++) {
5719                 TAILQ_INIT(&sctp_mcore_workers[i].que);
5720                 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]);
5721                 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]);
5722                 sctp_mcore_workers[i].cpuid = i;
5723         }
5724         if (sctp_cpuarry == NULL) {
5725                 SCTP_MALLOC(sctp_cpuarry, int *,
5726                     (mp_ncpus * sizeof(int)),
5727                     SCTP_M_MCORE);
5728                 i = 0;
5729                 CPU_FOREACH(cpu) {
5730                         sctp_cpuarry[i] = cpu;
5731                         i++;
5732                 }
5733         }
5734         /* Now start them all */
5735         CPU_FOREACH(cpu) {
5736                 (void)kproc_create(sctp_mcore_thread,
5737                     (void *)&sctp_mcore_workers[cpu],
5738                     &sctp_mcore_workers[cpu].thread_proc,
5739                     RFPROC,
5740                     SCTP_KTHREAD_PAGES,
5741                     SCTP_MCORE_NAME);
5742         }
5743 }
5744 #endif
5745
5746 void
5747 sctp_pcb_init(void)
5748 {
5749         /*
5750          * SCTP initialization for the PCB structures should be called by
5751          * the sctp_init() function.
5752          */
5753         int i;
5754         struct timeval tv;
5755
5756         if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) {
5757                 /* error I was called twice */
5758                 return;
5759         }
5760         SCTP_BASE_VAR(sctp_pcb_initialized) = 1;
5761
5762 #if defined(SCTP_LOCAL_TRACE_BUF)
5763         memset(&SCTP_BASE_SYSCTL(sctp_log), 0, sizeof(struct sctp_log));
5764 #endif
5765 #if defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5766         SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *,
5767             ((mp_maxid + 1) * sizeof(struct sctpstat)),
5768             SCTP_M_MCORE);
5769 #endif
5770         (void)SCTP_GETTIME_TIMEVAL(&tv);
5771 #if defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5772         memset(SCTP_BASE_STATS, 0, sizeof(struct sctpstat) * (mp_maxid + 1));
5773         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t)tv.tv_sec;
5774         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t)tv.tv_usec;
5775 #else
5776         memset(&SCTP_BASE_STATS, 0, sizeof(struct sctpstat));
5777         SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t)tv.tv_sec;
5778         SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t)tv.tv_usec;
5779 #endif
5780         /* init the empty list of (All) Endpoints */
5781         LIST_INIT(&SCTP_BASE_INFO(listhead));
5782
5783
5784         /* init the hash table of endpoints */
5785         TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize));
5786         TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize));
5787         TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale));
5788         SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31),
5789             &SCTP_BASE_INFO(hashasocmark));
5790         SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5791             &SCTP_BASE_INFO(hashmark));
5792         SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5793             &SCTP_BASE_INFO(hashtcpmark));
5794         SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize);
5795
5796         SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH,
5797             &SCTP_BASE_INFO(hashvrfmark));
5798
5799         SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE,
5800             &SCTP_BASE_INFO(vrf_ifn_hashmark));
5801         /* init the zones */
5802         /*
5803          * FIX ME: Should check for NULL returns, but if it does fail we are
5804          * doomed to panic anyways... add later maybe.
5805          */
5806         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep",
5807             sizeof(struct sctp_inpcb), maxsockets);
5808
5809         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc",
5810             sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
5811
5812         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr",
5813             sizeof(struct sctp_laddr),
5814             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5815
5816         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr",
5817             sizeof(struct sctp_nets),
5818             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5819
5820         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk",
5821             sizeof(struct sctp_tmit_chunk),
5822             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5823
5824         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq",
5825             sizeof(struct sctp_queued_to_read),
5826             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5827
5828         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out",
5829             sizeof(struct sctp_stream_queue_pending),
5830             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5831
5832         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf",
5833             sizeof(struct sctp_asconf),
5834             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5835
5836         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack",
5837             sizeof(struct sctp_asconf_ack),
5838             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5839
5840
5841         /* Master Lock INIT for info structure */
5842         SCTP_INP_INFO_LOCK_INIT();
5843         SCTP_STATLOG_INIT_LOCK();
5844
5845         SCTP_IPI_COUNT_INIT();
5846         SCTP_IPI_ADDR_INIT();
5847 #ifdef SCTP_PACKET_LOGGING
5848         SCTP_IP_PKTLOG_INIT();
5849 #endif
5850         LIST_INIT(&SCTP_BASE_INFO(addr_wq));
5851
5852         SCTP_WQ_ADDR_INIT();
5853         /* not sure if we need all the counts */
5854         SCTP_BASE_INFO(ipi_count_ep) = 0;
5855         /* assoc/tcb zone info */
5856         SCTP_BASE_INFO(ipi_count_asoc) = 0;
5857         /* local addrlist zone info */
5858         SCTP_BASE_INFO(ipi_count_laddr) = 0;
5859         /* remote addrlist zone info */
5860         SCTP_BASE_INFO(ipi_count_raddr) = 0;
5861         /* chunk info */
5862         SCTP_BASE_INFO(ipi_count_chunk) = 0;
5863
5864         /* socket queue zone info */
5865         SCTP_BASE_INFO(ipi_count_readq) = 0;
5866
5867         /* stream out queue cont */
5868         SCTP_BASE_INFO(ipi_count_strmoq) = 0;
5869
5870         SCTP_BASE_INFO(ipi_free_strmoq) = 0;
5871         SCTP_BASE_INFO(ipi_free_chunks) = 0;
5872
5873         SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer));
5874
5875         /* Init the TIMEWAIT list */
5876         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5877                 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]);
5878         }
5879         sctp_startup_iterator();
5880
5881 #if defined(SCTP_MCORE_INPUT) && defined(SMP)
5882         sctp_startup_mcore_threads();
5883 #endif
5884
5885         /*
5886          * INIT the default VRF which for BSD is the only one, other O/S's
5887          * may have more. But initially they must start with one and then
5888          * add the VRF's as addresses are added.
5889          */
5890         sctp_init_vrf_list(SCTP_DEFAULT_VRF);
5891 }
5892
5893 /*
5894  * Assumes that the SCTP_BASE_INFO() lock is NOT held.
5895  */
5896 void
5897 sctp_pcb_finish(void)
5898 {
5899         struct sctp_vrflist *vrf_bucket;
5900         struct sctp_vrf *vrf, *nvrf;
5901         struct sctp_ifn *ifn, *nifn;
5902         struct sctp_ifa *ifa, *nifa;
5903         struct sctpvtaghead *chain;
5904         struct sctp_tagblock *twait_block, *prev_twait_block;
5905         struct sctp_laddr *wi, *nwi;
5906         int i;
5907         struct sctp_iterator *it, *nit;
5908
5909         if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
5910                 SCTP_PRINTF("%s: race condition on teardown.\n", __func__);
5911                 return;
5912         }
5913         SCTP_BASE_VAR(sctp_pcb_initialized) = 0;
5914         /*
5915          * In FreeBSD the iterator thread never exits but we do clean up.
5916          * The only way FreeBSD reaches here is if we have VRF's but we
5917          * still add the ifdef to make it compile on old versions.
5918          */
5919 retry:
5920         SCTP_IPI_ITERATOR_WQ_LOCK();
5921         /*
5922          * sctp_iterator_worker() might be working on an it entry without
5923          * holding the lock.  We won't find it on the list either and
5924          * continue and free/destroy it.  While holding the lock, spin, to
5925          * avoid the race condition as sctp_iterator_worker() will have to
5926          * wait to re-acquire the lock.
5927          */
5928         if (sctp_it_ctl.iterator_running != 0 || sctp_it_ctl.cur_it != NULL) {
5929                 SCTP_IPI_ITERATOR_WQ_UNLOCK();
5930                 SCTP_PRINTF("%s: Iterator running while we held the lock. Retry. "
5931                     "cur_it=%p\n", __func__, sctp_it_ctl.cur_it);
5932                 DELAY(10);
5933                 goto retry;
5934         }
5935         TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
5936                 if (it->vn != curvnet) {
5937                         continue;
5938                 }
5939                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
5940                 if (it->function_atend != NULL) {
5941                         (*it->function_atend) (it->pointer, it->val);
5942                 }
5943                 SCTP_FREE(it, SCTP_M_ITER);
5944         }
5945         SCTP_IPI_ITERATOR_WQ_UNLOCK();
5946         SCTP_ITERATOR_LOCK();
5947         if ((sctp_it_ctl.cur_it) &&
5948             (sctp_it_ctl.cur_it->vn == curvnet)) {
5949                 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
5950         }
5951         SCTP_ITERATOR_UNLOCK();
5952         SCTP_OS_TIMER_STOP_DRAIN(&SCTP_BASE_INFO(addr_wq_timer.timer));
5953         SCTP_WQ_ADDR_LOCK();
5954         LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) {
5955                 LIST_REMOVE(wi, sctp_nxt_addr);
5956                 SCTP_DECR_LADDR_COUNT();
5957                 if (wi->action == SCTP_DEL_IP_ADDRESS) {
5958                         SCTP_FREE(wi->ifa, SCTP_M_IFA);
5959                 }
5960                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi);
5961         }
5962         SCTP_WQ_ADDR_UNLOCK();
5963
5964         /*
5965          * free the vrf/ifn/ifa lists and hashes (be sure address monitor is
5966          * destroyed first).
5967          */
5968         SCTP_IPI_ADDR_WLOCK();
5969         vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))];
5970         LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) {
5971                 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) {
5972                         LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) {
5973                                 /* free the ifa */
5974                                 LIST_REMOVE(ifa, next_bucket);
5975                                 LIST_REMOVE(ifa, next_ifa);
5976                                 SCTP_FREE(ifa, SCTP_M_IFA);
5977                         }
5978                         /* free the ifn */
5979                         LIST_REMOVE(ifn, next_bucket);
5980                         LIST_REMOVE(ifn, next_ifn);
5981                         SCTP_FREE(ifn, SCTP_M_IFN);
5982                 }
5983                 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
5984                 /* free the vrf */
5985                 LIST_REMOVE(vrf, next_vrf);
5986                 SCTP_FREE(vrf, SCTP_M_VRF);
5987         }
5988         SCTP_IPI_ADDR_WUNLOCK();
5989         /* free the vrf hashes */
5990         SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark));
5991         SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark));
5992
5993         /*
5994          * free the TIMEWAIT list elements malloc'd in the function
5995          * sctp_add_vtag_to_timewait()...
5996          */
5997         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5998                 chain = &SCTP_BASE_INFO(vtag_timewait)[i];
5999                 if (!LIST_EMPTY(chain)) {
6000                         prev_twait_block = NULL;
6001                         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6002                                 if (prev_twait_block) {
6003                                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
6004                                 }
6005                                 prev_twait_block = twait_block;
6006                         }
6007                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
6008                 }
6009         }
6010
6011         /* free the locks and mutexes */
6012 #ifdef SCTP_PACKET_LOGGING
6013         SCTP_IP_PKTLOG_DESTROY();
6014 #endif
6015         SCTP_IPI_ADDR_DESTROY();
6016         SCTP_STATLOG_DESTROY();
6017         SCTP_INP_INFO_LOCK_DESTROY();
6018
6019         SCTP_WQ_ADDR_DESTROY();
6020
6021         /* Get rid of other stuff too. */
6022         if (SCTP_BASE_INFO(sctp_asochash) != NULL)
6023                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark));
6024         if (SCTP_BASE_INFO(sctp_ephash) != NULL)
6025                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark));
6026         if (SCTP_BASE_INFO(sctp_tcpephash) != NULL)
6027                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark));
6028
6029         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep));
6030         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc));
6031         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr));
6032         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net));
6033         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk));
6034         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq));
6035         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq));
6036         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf));
6037         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack));
6038 #if defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
6039         SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE);
6040 #endif
6041 }
6042
6043
6044 int
6045 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
6046     int offset, int limit,
6047     struct sockaddr *src, struct sockaddr *dst,
6048     struct sockaddr *altsa, uint16_t port)
6049 {
6050         /*
6051          * grub through the INIT pulling addresses and loading them to the
6052          * nets structure in the asoc. The from address in the mbuf should
6053          * also be loaded (if it is not already). This routine can be called
6054          * with either INIT or INIT-ACK's as long as the m points to the IP
6055          * packet and the offset points to the beginning of the parameters.
6056          */
6057         struct sctp_inpcb *inp;
6058         struct sctp_nets *net, *nnet, *net_tmp;
6059         struct sctp_paramhdr *phdr, param_buf;
6060         struct sctp_tcb *stcb_tmp;
6061         uint16_t ptype, plen;
6062         struct sockaddr *sa;
6063         uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
6064         struct sctp_auth_random *p_random = NULL;
6065         uint16_t random_len = 0;
6066         uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE];
6067         struct sctp_auth_hmac_algo *hmacs = NULL;
6068         uint16_t hmacs_len = 0;
6069         uint8_t saw_asconf = 0;
6070         uint8_t saw_asconf_ack = 0;
6071         uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE];
6072         struct sctp_auth_chunk_list *chunks = NULL;
6073         uint16_t num_chunks = 0;
6074         sctp_key_t *new_key;
6075         uint32_t keylen;
6076         int got_random = 0, got_hmacs = 0, got_chklist = 0;
6077         uint8_t peer_supports_ecn;
6078         uint8_t peer_supports_prsctp;
6079         uint8_t peer_supports_auth;
6080         uint8_t peer_supports_asconf;
6081         uint8_t peer_supports_asconf_ack;
6082         uint8_t peer_supports_reconfig;
6083         uint8_t peer_supports_nrsack;
6084         uint8_t peer_supports_pktdrop;
6085         uint8_t peer_supports_idata;
6086 #ifdef INET
6087         struct sockaddr_in sin;
6088 #endif
6089 #ifdef INET6
6090         struct sockaddr_in6 sin6;
6091 #endif
6092
6093         /* First get the destination address setup too. */
6094 #ifdef INET
6095         memset(&sin, 0, sizeof(sin));
6096         sin.sin_family = AF_INET;
6097         sin.sin_len = sizeof(sin);
6098         sin.sin_port = stcb->rport;
6099 #endif
6100 #ifdef INET6
6101         memset(&sin6, 0, sizeof(sin6));
6102         sin6.sin6_family = AF_INET6;
6103         sin6.sin6_len = sizeof(struct sockaddr_in6);
6104         sin6.sin6_port = stcb->rport;
6105 #endif
6106         if (altsa) {
6107                 sa = altsa;
6108         } else {
6109                 sa = src;
6110         }
6111         peer_supports_idata = 0;
6112         peer_supports_ecn = 0;
6113         peer_supports_prsctp = 0;
6114         peer_supports_auth = 0;
6115         peer_supports_asconf = 0;
6116         peer_supports_asconf_ack = 0;
6117         peer_supports_reconfig = 0;
6118         peer_supports_nrsack = 0;
6119         peer_supports_pktdrop = 0;
6120         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
6121                 /* mark all addresses that we have currently on the list */
6122                 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
6123         }
6124         /* does the source address already exist? if so skip it */
6125         inp = stcb->sctp_ep;
6126         atomic_add_int(&stcb->asoc.refcnt, 1);
6127         stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb);
6128         atomic_add_int(&stcb->asoc.refcnt, -1);
6129
6130         if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
6131                 /* we must add the source address */
6132                 /* no scope set here since we have a tcb already. */
6133                 switch (sa->sa_family) {
6134 #ifdef INET
6135                 case AF_INET:
6136                         if (stcb->asoc.scope.ipv4_addr_legal) {
6137                                 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) {
6138                                         return (-1);
6139                                 }
6140                         }
6141                         break;
6142 #endif
6143 #ifdef INET6
6144                 case AF_INET6:
6145                         if (stcb->asoc.scope.ipv6_addr_legal) {
6146                                 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
6147                                         return (-2);
6148                                 }
6149                         }
6150                         break;
6151 #endif
6152                 default:
6153                         break;
6154                 }
6155         } else {
6156                 if (net_tmp != NULL && stcb_tmp == stcb) {
6157                         net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
6158                 } else if (stcb_tmp != stcb) {
6159                         /* It belongs to another association? */
6160                         if (stcb_tmp)
6161                                 SCTP_TCB_UNLOCK(stcb_tmp);
6162                         return (-3);
6163                 }
6164         }
6165         if (stcb->asoc.state == 0) {
6166                 /* the assoc was freed? */
6167                 return (-4);
6168         }
6169         /* now we must go through each of the params. */
6170         phdr = sctp_get_next_param(m, offset, &param_buf, sizeof(param_buf));
6171         while (phdr) {
6172                 ptype = ntohs(phdr->param_type);
6173                 plen = ntohs(phdr->param_length);
6174                 /*
6175                  * SCTP_PRINTF("ptype => %0x, plen => %d\n",
6176                  * (uint32_t)ptype, (int)plen);
6177                  */
6178                 if (offset + plen > limit) {
6179                         break;
6180                 }
6181                 if (plen < sizeof(struct sctp_paramhdr)) {
6182                         break;
6183                 }
6184 #ifdef INET
6185                 if (ptype == SCTP_IPV4_ADDRESS) {
6186                         if (stcb->asoc.scope.ipv4_addr_legal) {
6187                                 struct sctp_ipv4addr_param *p4, p4_buf;
6188
6189                                 /* ok get the v4 address and check/add */
6190                                 phdr = sctp_get_next_param(m, offset,
6191                                     (struct sctp_paramhdr *)&p4_buf,
6192                                     sizeof(p4_buf));
6193                                 if (plen != sizeof(struct sctp_ipv4addr_param) ||
6194                                     phdr == NULL) {
6195                                         return (-5);
6196                                 }
6197                                 p4 = (struct sctp_ipv4addr_param *)phdr;
6198                                 sin.sin_addr.s_addr = p4->addr;
6199                                 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
6200                                         /* Skip multi-cast addresses */
6201                                         goto next_param;
6202                                 }
6203                                 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) ||
6204                                     (sin.sin_addr.s_addr == INADDR_ANY)) {
6205                                         goto next_param;
6206                                 }
6207                                 sa = (struct sockaddr *)&sin;
6208                                 inp = stcb->sctp_ep;
6209                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6210                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6211                                     dst, stcb);
6212                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6213
6214                                 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) ||
6215                                     inp == NULL) {
6216                                         /* we must add the source address */
6217                                         /*
6218                                          * no scope set since we have a tcb
6219                                          * already
6220                                          */
6221
6222                                         /*
6223                                          * we must validate the state again
6224                                          * here
6225                                          */
6226                         add_it_now:
6227                                         if (stcb->asoc.state == 0) {
6228                                                 /* the assoc was freed? */
6229                                                 return (-7);
6230                                         }
6231                                         if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) {
6232                                                 return (-8);
6233                                         }
6234                                 } else if (stcb_tmp == stcb) {
6235                                         if (stcb->asoc.state == 0) {
6236                                                 /* the assoc was freed? */
6237                                                 return (-10);
6238                                         }
6239                                         if (net != NULL) {
6240                                                 /* clear flag */
6241                                                 net->dest_state &=
6242                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6243                                         }
6244                                 } else {
6245                                         /*
6246                                          * strange, address is in another
6247                                          * assoc? straighten out locks.
6248                                          */
6249                                         if (stcb_tmp) {
6250                                                 if (SCTP_GET_STATE(stcb_tmp) == SCTP_STATE_COOKIE_WAIT) {
6251                                                         struct mbuf *op_err;
6252                                                         char msg[SCTP_DIAG_INFO_LEN];
6253
6254                                                         /*
6255                                                          * in setup state we
6256                                                          * abort this guy
6257                                                          */
6258                                                         SCTP_SNPRINTF(msg, sizeof(msg),
6259                                                             "%s:%d at %s", __FILE__, __LINE__, __func__);
6260                                                         op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
6261                                                             msg);
6262                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6263                                                             stcb_tmp, op_err,
6264                                                             SCTP_SO_NOT_LOCKED);
6265                                                         goto add_it_now;
6266                                                 }
6267                                                 SCTP_TCB_UNLOCK(stcb_tmp);
6268                                         }
6269
6270                                         if (stcb->asoc.state == 0) {
6271                                                 /* the assoc was freed? */
6272                                                 return (-12);
6273                                         }
6274                                         return (-13);
6275                                 }
6276                         }
6277                 } else
6278 #endif
6279 #ifdef INET6
6280                 if (ptype == SCTP_IPV6_ADDRESS) {
6281                         if (stcb->asoc.scope.ipv6_addr_legal) {
6282                                 /* ok get the v6 address and check/add */
6283                                 struct sctp_ipv6addr_param *p6, p6_buf;
6284
6285                                 phdr = sctp_get_next_param(m, offset,
6286                                     (struct sctp_paramhdr *)&p6_buf,
6287                                     sizeof(p6_buf));
6288                                 if (plen != sizeof(struct sctp_ipv6addr_param) ||
6289                                     phdr == NULL) {
6290                                         return (-14);
6291                                 }
6292                                 p6 = (struct sctp_ipv6addr_param *)phdr;
6293                                 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
6294                                     sizeof(p6->addr));
6295                                 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
6296                                         /* Skip multi-cast addresses */
6297                                         goto next_param;
6298                                 }
6299                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
6300                                         /*
6301                                          * Link local make no sense without
6302                                          * scope
6303                                          */
6304                                         goto next_param;
6305                                 }
6306                                 sa = (struct sockaddr *)&sin6;
6307                                 inp = stcb->sctp_ep;
6308                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6309                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6310                                     dst, stcb);
6311                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6312                                 if (stcb_tmp == NULL &&
6313                                     (inp == stcb->sctp_ep || inp == NULL)) {
6314                                         /*
6315                                          * we must validate the state again
6316                                          * here
6317                                          */
6318                         add_it_now6:
6319                                         if (stcb->asoc.state == 0) {
6320                                                 /* the assoc was freed? */
6321                                                 return (-16);
6322                                         }
6323                                         /*
6324                                          * we must add the address, no scope
6325                                          * set
6326                                          */
6327                                         if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) {
6328                                                 return (-17);
6329                                         }
6330                                 } else if (stcb_tmp == stcb) {
6331                                         /*
6332                                          * we must validate the state again
6333                                          * here
6334                                          */
6335                                         if (stcb->asoc.state == 0) {
6336                                                 /* the assoc was freed? */
6337                                                 return (-19);
6338                                         }
6339                                         if (net != NULL) {
6340                                                 /* clear flag */
6341                                                 net->dest_state &=
6342                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6343                                         }
6344                                 } else {
6345                                         /*
6346                                          * strange, address is in another
6347                                          * assoc? straighten out locks.
6348                                          */
6349                                         if (stcb_tmp) {
6350                                                 if (SCTP_GET_STATE(stcb_tmp) == SCTP_STATE_COOKIE_WAIT) {
6351                                                         struct mbuf *op_err;
6352                                                         char msg[SCTP_DIAG_INFO_LEN];
6353
6354                                                         /*
6355                                                          * in setup state we
6356                                                          * abort this guy
6357                                                          */
6358                                                         SCTP_SNPRINTF(msg, sizeof(msg),
6359                                                             "%s:%d at %s", __FILE__, __LINE__, __func__);
6360                                                         op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
6361                                                             msg);
6362                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6363                                                             stcb_tmp, op_err,
6364                                                             SCTP_SO_NOT_LOCKED);
6365                                                         goto add_it_now6;
6366                                                 }
6367                                                 SCTP_TCB_UNLOCK(stcb_tmp);
6368                                         }
6369                                         if (stcb->asoc.state == 0) {
6370                                                 /* the assoc was freed? */
6371                                                 return (-21);
6372                                         }
6373                                         return (-22);
6374                                 }
6375                         }
6376                 } else
6377 #endif
6378                 if (ptype == SCTP_ECN_CAPABLE) {
6379                         peer_supports_ecn = 1;
6380                 } else if (ptype == SCTP_ULP_ADAPTATION) {
6381                         if (stcb->asoc.state != SCTP_STATE_OPEN) {
6382                                 struct sctp_adaptation_layer_indication ai,
6383                                                                 *aip;
6384
6385                                 phdr = sctp_get_next_param(m, offset,
6386                                     (struct sctp_paramhdr *)&ai, sizeof(ai));
6387                                 aip = (struct sctp_adaptation_layer_indication *)phdr;
6388                                 if (aip) {
6389                                         stcb->asoc.peers_adaptation = ntohl(aip->indication);
6390                                         stcb->asoc.adaptation_needed = 1;
6391                                 }
6392                         }
6393                 } else if (ptype == SCTP_SET_PRIM_ADDR) {
6394                         struct sctp_asconf_addr_param lstore, *fee;
6395                         int lptype;
6396                         struct sockaddr *lsa = NULL;
6397 #ifdef INET
6398                         struct sctp_asconf_addrv4_param *fii;
6399 #endif
6400
6401                         if (stcb->asoc.asconf_supported == 0) {
6402                                 return (-100);
6403                         }
6404                         if (plen > sizeof(lstore)) {
6405                                 return (-23);
6406                         }
6407                         if (plen < sizeof(struct sctp_asconf_addrv4_param)) {
6408                                 return (-101);
6409                         }
6410                         phdr = sctp_get_next_param(m, offset,
6411                             (struct sctp_paramhdr *)&lstore,
6412                             plen);
6413                         if (phdr == NULL) {
6414                                 return (-24);
6415                         }
6416                         fee = (struct sctp_asconf_addr_param *)phdr;
6417                         lptype = ntohs(fee->addrp.ph.param_type);
6418                         switch (lptype) {
6419 #ifdef INET
6420                         case SCTP_IPV4_ADDRESS:
6421                                 if (plen !=
6422                                     sizeof(struct sctp_asconf_addrv4_param)) {
6423                                         SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n",
6424                                             (int)sizeof(struct sctp_asconf_addrv4_param),
6425                                             plen);
6426                                 } else {
6427                                         fii = (struct sctp_asconf_addrv4_param *)fee;
6428                                         sin.sin_addr.s_addr = fii->addrp.addr;
6429                                         lsa = (struct sockaddr *)&sin;
6430                                 }
6431                                 break;
6432 #endif
6433 #ifdef INET6
6434                         case SCTP_IPV6_ADDRESS:
6435                                 if (plen !=
6436                                     sizeof(struct sctp_asconf_addr_param)) {
6437                                         SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
6438                                             (int)sizeof(struct sctp_asconf_addr_param),
6439                                             plen);
6440                                 } else {
6441                                         memcpy(sin6.sin6_addr.s6_addr,
6442                                             fee->addrp.addr,
6443                                             sizeof(fee->addrp.addr));
6444                                         lsa = (struct sockaddr *)&sin6;
6445                                 }
6446                                 break;
6447 #endif
6448                         default:
6449                                 break;
6450                         }
6451                         if (lsa) {
6452                                 (void)sctp_set_primary_addr(stcb, sa, NULL);
6453                         }
6454                 } else if (ptype == SCTP_HAS_NAT_SUPPORT) {
6455                         stcb->asoc.peer_supports_nat = 1;
6456                 } else if (ptype == SCTP_PRSCTP_SUPPORTED) {
6457                         /* Peer supports pr-sctp */
6458                         peer_supports_prsctp = 1;
6459                 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
6460                         /* A supported extension chunk */
6461                         struct sctp_supported_chunk_types_param *pr_supported;
6462                         uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
6463                         int num_ent, i;
6464
6465                         if (plen > sizeof(local_store)) {
6466                                 return (-35);
6467                         }
6468                         phdr = sctp_get_next_param(m, offset,
6469                             (struct sctp_paramhdr *)&local_store, plen);
6470                         if (phdr == NULL) {
6471                                 return (-25);
6472                         }
6473                         pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
6474                         num_ent = plen - sizeof(struct sctp_paramhdr);
6475                         for (i = 0; i < num_ent; i++) {
6476                                 switch (pr_supported->chunk_types[i]) {
6477                                 case SCTP_ASCONF:
6478                                         peer_supports_asconf = 1;
6479                                         break;
6480                                 case SCTP_ASCONF_ACK:
6481                                         peer_supports_asconf_ack = 1;
6482                                         break;
6483                                 case SCTP_FORWARD_CUM_TSN:
6484                                         peer_supports_prsctp = 1;
6485                                         break;
6486                                 case SCTP_PACKET_DROPPED:
6487                                         peer_supports_pktdrop = 1;
6488                                         break;
6489                                 case SCTP_NR_SELECTIVE_ACK:
6490                                         peer_supports_nrsack = 1;
6491                                         break;
6492                                 case SCTP_STREAM_RESET:
6493                                         peer_supports_reconfig = 1;
6494                                         break;
6495                                 case SCTP_AUTHENTICATION:
6496                                         peer_supports_auth = 1;
6497                                         break;
6498                                 case SCTP_IDATA:
6499                                         peer_supports_idata = 1;
6500                                         break;
6501                                 default:
6502                                         /* one I have not learned yet */
6503                                         break;
6504
6505                                 }
6506                         }
6507                 } else if (ptype == SCTP_RANDOM) {
6508                         if (plen > sizeof(random_store))
6509                                 break;
6510                         if (got_random) {
6511                                 /* already processed a RANDOM */
6512                                 goto next_param;
6513                         }
6514                         phdr = sctp_get_next_param(m, offset,
6515                             (struct sctp_paramhdr *)random_store,
6516                             plen);
6517                         if (phdr == NULL)
6518                                 return (-26);
6519                         p_random = (struct sctp_auth_random *)phdr;
6520                         random_len = plen - sizeof(*p_random);
6521                         /* enforce the random length */
6522                         if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) {
6523                                 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n");
6524                                 return (-27);
6525                         }
6526                         got_random = 1;
6527                 } else if (ptype == SCTP_HMAC_LIST) {
6528                         uint16_t num_hmacs;
6529                         uint16_t i;
6530
6531                         if (plen > sizeof(hmacs_store))
6532                                 break;
6533                         if (got_hmacs) {
6534                                 /* already processed a HMAC list */
6535                                 goto next_param;
6536                         }
6537                         phdr = sctp_get_next_param(m, offset,
6538                             (struct sctp_paramhdr *)hmacs_store,
6539                             plen);
6540                         if (phdr == NULL)
6541                                 return (-28);
6542                         hmacs = (struct sctp_auth_hmac_algo *)phdr;
6543                         hmacs_len = plen - sizeof(*hmacs);
6544                         num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
6545                         /* validate the hmac list */
6546                         if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
6547                                 return (-29);
6548                         }
6549                         if (stcb->asoc.peer_hmacs != NULL)
6550                                 sctp_free_hmaclist(stcb->asoc.peer_hmacs);
6551                         stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs);
6552                         if (stcb->asoc.peer_hmacs != NULL) {
6553                                 for (i = 0; i < num_hmacs; i++) {
6554                                         (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs,
6555                                             ntohs(hmacs->hmac_ids[i]));
6556                                 }
6557                         }
6558                         got_hmacs = 1;
6559                 } else if (ptype == SCTP_CHUNK_LIST) {
6560                         int i;
6561
6562                         if (plen > sizeof(chunks_store))
6563                                 break;
6564                         if (got_chklist) {
6565                                 /* already processed a Chunks list */
6566                                 goto next_param;
6567                         }
6568                         phdr = sctp_get_next_param(m, offset,
6569                             (struct sctp_paramhdr *)chunks_store,
6570                             plen);
6571                         if (phdr == NULL)
6572                                 return (-30);
6573                         chunks = (struct sctp_auth_chunk_list *)phdr;
6574                         num_chunks = plen - sizeof(*chunks);
6575                         if (stcb->asoc.peer_auth_chunks != NULL)
6576                                 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks);
6577                         else
6578                                 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist();
6579                         for (i = 0; i < num_chunks; i++) {
6580                                 (void)sctp_auth_add_chunk(chunks->chunk_types[i],
6581                                     stcb->asoc.peer_auth_chunks);
6582                                 /* record asconf/asconf-ack if listed */
6583                                 if (chunks->chunk_types[i] == SCTP_ASCONF)
6584                                         saw_asconf = 1;
6585                                 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK)
6586                                         saw_asconf_ack = 1;
6587
6588                         }
6589                         got_chklist = 1;
6590                 } else if ((ptype == SCTP_HEARTBEAT_INFO) ||
6591                             (ptype == SCTP_STATE_COOKIE) ||
6592                             (ptype == SCTP_UNRECOG_PARAM) ||
6593                             (ptype == SCTP_COOKIE_PRESERVE) ||
6594                             (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
6595                             (ptype == SCTP_ADD_IP_ADDRESS) ||
6596                             (ptype == SCTP_DEL_IP_ADDRESS) ||
6597                             (ptype == SCTP_ERROR_CAUSE_IND) ||
6598                     (ptype == SCTP_SUCCESS_REPORT)) {
6599                         /* don't care */
6600                 } else {
6601                         if ((ptype & 0x8000) == 0x0000) {
6602                                 /*
6603                                  * must stop processing the rest of the
6604                                  * param's. Any report bits were handled
6605                                  * with the call to
6606                                  * sctp_arethere_unrecognized_parameters()
6607                                  * when the INIT or INIT-ACK was first seen.
6608                                  */
6609                                 break;
6610                         }
6611                 }
6612
6613 next_param:
6614                 offset += SCTP_SIZE32(plen);
6615                 if (offset >= limit) {
6616                         break;
6617                 }
6618                 phdr = sctp_get_next_param(m, offset, &param_buf,
6619                     sizeof(param_buf));
6620         }
6621         /* Now check to see if we need to purge any addresses */
6622         TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) {
6623                 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
6624                     SCTP_ADDR_NOT_IN_ASSOC) {
6625                         /* This address has been removed from the asoc */
6626                         /* remove and free it */
6627                         stcb->asoc.numnets--;
6628                         TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
6629                         sctp_free_remote_addr(net);
6630                         if (net == stcb->asoc.primary_destination) {
6631                                 stcb->asoc.primary_destination = NULL;
6632                                 sctp_select_primary_destination(stcb);
6633                         }
6634                 }
6635         }
6636         if ((stcb->asoc.ecn_supported == 1) &&
6637             (peer_supports_ecn == 0)) {
6638                 stcb->asoc.ecn_supported = 0;
6639         }
6640         if ((stcb->asoc.prsctp_supported == 1) &&
6641             (peer_supports_prsctp == 0)) {
6642                 stcb->asoc.prsctp_supported = 0;
6643         }
6644         if ((stcb->asoc.auth_supported == 1) &&
6645             ((peer_supports_auth == 0) ||
6646             (got_random == 0) || (got_hmacs == 0))) {
6647                 stcb->asoc.auth_supported = 0;
6648         }
6649         if ((stcb->asoc.asconf_supported == 1) &&
6650             ((peer_supports_asconf == 0) || (peer_supports_asconf_ack == 0) ||
6651             (stcb->asoc.auth_supported == 0) ||
6652             (saw_asconf == 0) || (saw_asconf_ack == 0))) {
6653                 stcb->asoc.asconf_supported = 0;
6654         }
6655         if ((stcb->asoc.reconfig_supported == 1) &&
6656             (peer_supports_reconfig == 0)) {
6657                 stcb->asoc.reconfig_supported = 0;
6658         }
6659         if ((stcb->asoc.idata_supported == 1) &&
6660             (peer_supports_idata == 0)) {
6661                 stcb->asoc.idata_supported = 0;
6662         }
6663         if ((stcb->asoc.nrsack_supported == 1) &&
6664             (peer_supports_nrsack == 0)) {
6665                 stcb->asoc.nrsack_supported = 0;
6666         }
6667         if ((stcb->asoc.pktdrop_supported == 1) &&
6668             (peer_supports_pktdrop == 0)) {
6669                 stcb->asoc.pktdrop_supported = 0;
6670         }
6671         /* validate authentication required parameters */
6672         if ((peer_supports_auth == 0) && (got_chklist == 1)) {
6673                 /* peer does not support auth but sent a chunks list? */
6674                 return (-31);
6675         }
6676         if ((peer_supports_asconf == 1) && (peer_supports_auth == 0)) {
6677                 /* peer supports asconf but not auth? */
6678                 return (-32);
6679         } else if ((peer_supports_asconf == 1) &&
6680                     (peer_supports_auth == 1) &&
6681             ((saw_asconf == 0) || (saw_asconf_ack == 0))) {
6682                 return (-33);
6683         }
6684         /* concatenate the full random key */
6685         keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len;
6686         if (chunks != NULL) {
6687                 keylen += sizeof(*chunks) + num_chunks;
6688         }
6689         new_key = sctp_alloc_key(keylen);
6690         if (new_key != NULL) {
6691                 /* copy in the RANDOM */
6692                 if (p_random != NULL) {
6693                         keylen = sizeof(*p_random) + random_len;
6694                         memcpy(new_key->key, p_random, keylen);
6695                 } else {
6696                         keylen = 0;
6697                 }
6698                 /* append in the AUTH chunks */
6699                 if (chunks != NULL) {
6700                         memcpy(new_key->key + keylen, chunks,
6701                             sizeof(*chunks) + num_chunks);
6702                         keylen += sizeof(*chunks) + num_chunks;
6703                 }
6704                 /* append in the HMACs */
6705                 if (hmacs != NULL) {
6706                         memcpy(new_key->key + keylen, hmacs,
6707                             sizeof(*hmacs) + hmacs_len);
6708                 }
6709         } else {
6710                 /* failed to get memory for the key */
6711                 return (-34);
6712         }
6713         if (stcb->asoc.authinfo.peer_random != NULL)
6714                 sctp_free_key(stcb->asoc.authinfo.peer_random);
6715         stcb->asoc.authinfo.peer_random = new_key;
6716         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
6717         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
6718
6719         return (0);
6720 }
6721
6722 int
6723 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
6724     struct sctp_nets *net)
6725 {
6726         /* make sure the requested primary address exists in the assoc */
6727         if (net == NULL && sa)
6728                 net = sctp_findnet(stcb, sa);
6729
6730         if (net == NULL) {
6731                 /* didn't find the requested primary address! */
6732                 return (-1);
6733         } else {
6734                 /* set the primary address */
6735                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
6736                         /* Must be confirmed, so queue to set */
6737                         net->dest_state |= SCTP_ADDR_REQ_PRIMARY;
6738                         return (0);
6739                 }
6740                 stcb->asoc.primary_destination = net;
6741                 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) {
6742                         sctp_free_remote_addr(stcb->asoc.alternate);
6743                         stcb->asoc.alternate = NULL;
6744                 }
6745                 net = TAILQ_FIRST(&stcb->asoc.nets);
6746                 if (net != stcb->asoc.primary_destination) {
6747                         /*
6748                          * first one on the list is NOT the primary
6749                          * sctp_cmpaddr() is much more efficient if the
6750                          * primary is the first on the list, make it so.
6751                          */
6752                         TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6753                         TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6754                 }
6755                 return (0);
6756         }
6757 }
6758
6759 int
6760 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now)
6761 {
6762         /*
6763          * This function serves two purposes. It will see if a TAG can be
6764          * re-used and return 1 for yes it is ok and 0 for don't use that
6765          * tag. A secondary function it will do is purge out old tags that
6766          * can be removed.
6767          */
6768         struct sctpvtaghead *chain;
6769         struct sctp_tagblock *twait_block;
6770         struct sctpasochead *head;
6771         struct sctp_tcb *stcb;
6772         int i;
6773
6774         SCTP_INP_INFO_RLOCK();
6775         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
6776             SCTP_BASE_INFO(hashasocmark))];
6777         LIST_FOREACH(stcb, head, sctp_asocs) {
6778                 /*
6779                  * We choose not to lock anything here. TCB's can't be
6780                  * removed since we have the read lock, so they can't be
6781                  * freed on us, same thing for the INP. I may be wrong with
6782                  * this assumption, but we will go with it for now :-)
6783                  */
6784                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
6785                         continue;
6786                 }
6787                 if (stcb->asoc.my_vtag == tag) {
6788                         /* candidate */
6789                         if (stcb->rport != rport) {
6790                                 continue;
6791                         }
6792                         if (stcb->sctp_ep->sctp_lport != lport) {
6793                                 continue;
6794                         }
6795                         /* Its a used tag set */
6796                         SCTP_INP_INFO_RUNLOCK();
6797                         return (0);
6798                 }
6799         }
6800         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
6801         /* Now what about timed wait ? */
6802         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6803                 /*
6804                  * Block(s) are present, lets see if we have this tag in the
6805                  * list
6806                  */
6807                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
6808                         if (twait_block->vtag_block[i].v_tag == 0) {
6809                                 /* not used */
6810                                 continue;
6811                         } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire <
6812                             now->tv_sec) {
6813                                 /* Audit expires this guy */
6814                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
6815                                 twait_block->vtag_block[i].v_tag = 0;
6816                                 twait_block->vtag_block[i].lport = 0;
6817                                 twait_block->vtag_block[i].rport = 0;
6818                         } else if ((twait_block->vtag_block[i].v_tag == tag) &&
6819                                     (twait_block->vtag_block[i].lport == lport) &&
6820                             (twait_block->vtag_block[i].rport == rport)) {
6821                                 /* Bad tag, sorry :< */
6822                                 SCTP_INP_INFO_RUNLOCK();
6823                                 return (0);
6824                         }
6825                 }
6826         }
6827         SCTP_INP_INFO_RUNLOCK();
6828         return (1);
6829 }
6830
6831 static void
6832 sctp_drain_mbufs(struct sctp_tcb *stcb)
6833 {
6834         /*
6835          * We must hunt this association for MBUF's past the cumack (i.e.
6836          * out of order data that we can renege on).
6837          */
6838         struct sctp_association *asoc;
6839         struct sctp_tmit_chunk *chk, *nchk;
6840         uint32_t cumulative_tsn_p1;
6841         struct sctp_queued_to_read *control, *ncontrol;
6842         int cnt, strmat;
6843         uint32_t gap, i;
6844         int fnd = 0;
6845
6846         /* We look for anything larger than the cum-ack + 1 */
6847
6848         asoc = &stcb->asoc;
6849         if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) {
6850                 /* none we can reneg on. */
6851                 return;
6852         }
6853         SCTP_STAT_INCR(sctps_protocol_drains_done);
6854         cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
6855         cnt = 0;
6856         /* Ok that was fun, now we will drain all the inbound streams? */
6857         for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
6858                 TAILQ_FOREACH_SAFE(control, &asoc->strmin[strmat].inqueue, next_instrm, ncontrol) {
6859 #ifdef INVARIANTS
6860                         if (control->on_strm_q != SCTP_ON_ORDERED) {
6861                                 panic("Huh control: %p on_q: %d -- not ordered?",
6862                                     control, control->on_strm_q);
6863                         }
6864 #endif
6865                         if (SCTP_TSN_GT(control->sinfo_tsn, cumulative_tsn_p1)) {
6866                                 /* Yep it is above cum-ack */
6867                                 cnt++;
6868                                 SCTP_CALC_TSN_TO_GAP(gap, control->sinfo_tsn, asoc->mapping_array_base_tsn);
6869                                 KASSERT(control->length > 0, ("control has zero length"));
6870                                 if (asoc->size_on_all_streams >= control->length) {
6871                                         asoc->size_on_all_streams -= control->length;
6872                                 } else {
6873 #ifdef INVARIANTS
6874                                         panic("size_on_all_streams = %u smaller than control length %u", asoc->size_on_all_streams, control->length);
6875 #else
6876                                         asoc->size_on_all_streams = 0;
6877 #endif
6878                                 }
6879                                 sctp_ucount_decr(asoc->cnt_on_all_streams);
6880                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6881                                 if (control->on_read_q) {
6882                                         TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next);
6883                                         control->on_read_q = 0;
6884                                 }
6885                                 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, control, next_instrm);
6886                                 control->on_strm_q = 0;
6887                                 if (control->data) {
6888                                         sctp_m_freem(control->data);
6889                                         control->data = NULL;
6890                                 }
6891                                 sctp_free_remote_addr(control->whoFrom);
6892                                 /* Now its reasm? */
6893                                 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) {
6894                                         cnt++;
6895                                         SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn);
6896                                         KASSERT(chk->send_size > 0, ("chunk has zero length"));
6897                                         if (asoc->size_on_reasm_queue >= chk->send_size) {
6898                                                 asoc->size_on_reasm_queue -= chk->send_size;
6899                                         } else {
6900 #ifdef INVARIANTS
6901                                                 panic("size_on_reasm_queue = %u smaller than chunk length %u", asoc->size_on_reasm_queue, chk->send_size);
6902 #else
6903                                                 asoc->size_on_reasm_queue = 0;
6904 #endif
6905                                         }
6906                                         sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6907                                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6908                                         TAILQ_REMOVE(&control->reasm, chk, sctp_next);
6909                                         if (chk->data) {
6910                                                 sctp_m_freem(chk->data);
6911                                                 chk->data = NULL;
6912                                         }
6913                                         sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6914                                 }
6915                                 sctp_free_a_readq(stcb, control);
6916                         }
6917                 }
6918                 TAILQ_FOREACH_SAFE(control, &asoc->strmin[strmat].uno_inqueue, next_instrm, ncontrol) {
6919 #ifdef INVARIANTS
6920                         if (control->on_strm_q != SCTP_ON_UNORDERED) {
6921                                 panic("Huh control: %p on_q: %d -- not unordered?",
6922                                     control, control->on_strm_q);
6923                         }
6924 #endif
6925                         if (SCTP_TSN_GT(control->sinfo_tsn, cumulative_tsn_p1)) {
6926                                 /* Yep it is above cum-ack */
6927                                 cnt++;
6928                                 SCTP_CALC_TSN_TO_GAP(gap, control->sinfo_tsn, asoc->mapping_array_base_tsn);
6929                                 KASSERT(control->length > 0, ("control has zero length"));
6930                                 if (asoc->size_on_all_streams >= control->length) {
6931                                         asoc->size_on_all_streams -= control->length;
6932                                 } else {
6933 #ifdef INVARIANTS
6934                                         panic("size_on_all_streams = %u smaller than control length %u", asoc->size_on_all_streams, control->length);
6935 #else
6936                                         asoc->size_on_all_streams = 0;
6937 #endif
6938                                 }
6939                                 sctp_ucount_decr(asoc->cnt_on_all_streams);
6940                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6941                                 if (control->on_read_q) {
6942                                         TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next);
6943                                         control->on_read_q = 0;
6944                                 }
6945                                 TAILQ_REMOVE(&asoc->strmin[strmat].uno_inqueue, control, next_instrm);
6946                                 control->on_strm_q = 0;
6947                                 if (control->data) {
6948                                         sctp_m_freem(control->data);
6949                                         control->data = NULL;
6950                                 }
6951                                 sctp_free_remote_addr(control->whoFrom);
6952                                 /* Now its reasm? */
6953                                 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) {
6954                                         cnt++;
6955                                         SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn);
6956                                         KASSERT(chk->send_size > 0, ("chunk has zero length"));
6957                                         if (asoc->size_on_reasm_queue >= chk->send_size) {
6958                                                 asoc->size_on_reasm_queue -= chk->send_size;
6959                                         } else {
6960 #ifdef INVARIANTS
6961                                                 panic("size_on_reasm_queue = %u smaller than chunk length %u", asoc->size_on_reasm_queue, chk->send_size);
6962 #else
6963                                                 asoc->size_on_reasm_queue = 0;
6964 #endif
6965                                         }
6966                                         sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6967                                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6968                                         TAILQ_REMOVE(&control->reasm, chk, sctp_next);
6969                                         if (chk->data) {
6970                                                 sctp_m_freem(chk->data);
6971                                                 chk->data = NULL;
6972                                         }
6973                                         sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6974                                 }
6975                                 sctp_free_a_readq(stcb, control);
6976                         }
6977                 }
6978         }
6979         if (cnt) {
6980                 /* We must back down to see what the new highest is */
6981                 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) {
6982                         SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn);
6983                         if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) {
6984                                 asoc->highest_tsn_inside_map = i;
6985                                 fnd = 1;
6986                                 break;
6987                         }
6988                 }
6989                 if (!fnd) {
6990                         asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1;
6991                 }
6992
6993                 /*
6994                  * Question, should we go through the delivery queue? The
6995                  * only reason things are on here is the app not reading OR
6996                  * a p-d-api up. An attacker COULD send enough in to
6997                  * initiate the PD-API and then send a bunch of stuff to
6998                  * other streams... these would wind up on the delivery
6999                  * queue.. and then we would not get to them. But in order
7000                  * to do this I then have to back-track and un-deliver
7001                  * sequence numbers in streams.. el-yucko. I think for now
7002                  * we will NOT look at the delivery queue and leave it to be
7003                  * something to consider later. An alternative would be to
7004                  * abort the P-D-API with a notification and then deliver
7005                  * the data.... Or another method might be to keep track of
7006                  * how many times the situation occurs and if we see a
7007                  * possible attack underway just abort the association.
7008                  */
7009 #ifdef SCTP_DEBUG
7010                 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt);
7011 #endif
7012                 /*
7013                  * Now do we need to find a new
7014                  * asoc->highest_tsn_inside_map?
7015                  */
7016                 asoc->last_revoke_count = cnt;
7017                 sctp_timer_stop(SCTP_TIMER_TYPE_RECV, stcb->sctp_ep, stcb, NULL,
7018                     SCTP_FROM_SCTP_PCB + SCTP_LOC_11);
7019                 /* sa_ignore NO_NULL_CHK */
7020                 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED);
7021                 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED);
7022         }
7023         /*
7024          * Another issue, in un-setting the TSN's in the mapping array we
7025          * DID NOT adjust the highest_tsn marker.  This will cause one of
7026          * two things to occur. It may cause us to do extra work in checking
7027          * for our mapping array movement. More importantly it may cause us
7028          * to SACK every datagram. This may not be a bad thing though since
7029          * we will recover once we get our cum-ack above and all this stuff
7030          * we dumped recovered.
7031          */
7032 }
7033
7034 void
7035 sctp_drain()
7036 {
7037         /*
7038          * We must walk the PCB lists for ALL associations here. The system
7039          * is LOW on MBUF's and needs help. This is where reneging will
7040          * occur. We really hope this does NOT happen!
7041          */
7042         VNET_ITERATOR_DECL(vnet_iter);
7043         VNET_LIST_RLOCK_NOSLEEP();
7044         VNET_FOREACH(vnet_iter) {
7045                 CURVNET_SET(vnet_iter);
7046                 struct sctp_inpcb *inp;
7047                 struct sctp_tcb *stcb;
7048
7049                 SCTP_STAT_INCR(sctps_protocol_drain_calls);
7050                 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) {
7051 #ifdef VIMAGE
7052                         continue;
7053 #else
7054                         return;
7055 #endif
7056                 }
7057                 SCTP_INP_INFO_RLOCK();
7058                 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) {
7059                         /* For each endpoint */
7060                         SCTP_INP_RLOCK(inp);
7061                         LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
7062                                 /* For each association */
7063                                 SCTP_TCB_LOCK(stcb);
7064                                 sctp_drain_mbufs(stcb);
7065                                 SCTP_TCB_UNLOCK(stcb);
7066                         }
7067                         SCTP_INP_RUNLOCK(inp);
7068                 }
7069                 SCTP_INP_INFO_RUNLOCK();
7070                 CURVNET_RESTORE();
7071         }
7072         VNET_LIST_RUNLOCK_NOSLEEP();
7073 }
7074
7075 /*
7076  * start a new iterator
7077  * iterates through all endpoints and associations based on the pcb_state
7078  * flags and asoc_state.  "af" (mandatory) is executed for all matching
7079  * assocs and "ef" (optional) is executed when the iterator completes.
7080  * "inpf" (optional) is executed for each new endpoint as it is being
7081  * iterated through. inpe (optional) is called when the inp completes
7082  * its way through all the stcbs.
7083  */
7084 int
7085 sctp_initiate_iterator(inp_func inpf,
7086     asoc_func af,
7087     inp_func inpe,
7088     uint32_t pcb_state,
7089     uint32_t pcb_features,
7090     uint32_t asoc_state,
7091     void *argp,
7092     uint32_t argi,
7093     end_func ef,
7094     struct sctp_inpcb *s_inp,
7095     uint8_t chunk_output_off)
7096 {
7097         struct sctp_iterator *it = NULL;
7098
7099         if (af == NULL) {
7100                 return (-1);
7101         }
7102         if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
7103                 SCTP_PRINTF("%s: abort on initialize being %d\n", __func__,
7104                     SCTP_BASE_VAR(sctp_pcb_initialized));
7105                 return (-1);
7106         }
7107         SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator),
7108             SCTP_M_ITER);
7109         if (it == NULL) {
7110                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
7111                 return (-1);
7112         }
7113         memset(it, 0, sizeof(*it));
7114         it->function_assoc = af;
7115         it->function_inp = inpf;
7116         if (inpf)
7117                 it->done_current_ep = 0;
7118         else
7119                 it->done_current_ep = 1;
7120         it->function_atend = ef;
7121         it->pointer = argp;
7122         it->val = argi;
7123         it->pcb_flags = pcb_state;
7124         it->pcb_features = pcb_features;
7125         it->asoc_state = asoc_state;
7126         it->function_inp_end = inpe;
7127         it->no_chunk_output = chunk_output_off;
7128         it->vn = curvnet;
7129         if (s_inp) {
7130                 /* Assume lock is held here */
7131                 it->inp = s_inp;
7132                 SCTP_INP_INCR_REF(it->inp);
7133                 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
7134         } else {
7135                 SCTP_INP_INFO_RLOCK();
7136                 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead));
7137                 if (it->inp) {
7138                         SCTP_INP_INCR_REF(it->inp);
7139                 }
7140                 SCTP_INP_INFO_RUNLOCK();
7141                 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
7142
7143         }
7144         SCTP_IPI_ITERATOR_WQ_LOCK();
7145         if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
7146                 SCTP_IPI_ITERATOR_WQ_UNLOCK();
7147                 SCTP_PRINTF("%s: rollback on initialize being %d it=%p\n", __func__,
7148                     SCTP_BASE_VAR(sctp_pcb_initialized), it);
7149                 SCTP_FREE(it, SCTP_M_ITER);
7150                 return (-1);
7151         }
7152         TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
7153         if (sctp_it_ctl.iterator_running == 0) {
7154                 sctp_wakeup_iterator();
7155         }
7156         SCTP_IPI_ITERATOR_WQ_UNLOCK();
7157         /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */
7158         return (0);
7159 }