The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
sys/netinet/sctp_pcb.c

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    1 /*-
    2  * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved.
    3  *
    4  * Redistribution and use in source and binary forms, with or without
    5  * modification, are permitted provided that the following conditions are met:
    6  *
    7  * a) Redistributions of source code must retain the above copyright notice,
    8  *   this list of conditions and the following disclaimer.
    9  *
   10  * b) Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in
   12  *   the documentation and/or other materials provided with the distribution.
   13  *
   14  * c) Neither the name of Cisco Systems, Inc. nor the names of its
   15  *    contributors may be used to endorse or promote products derived
   16  *    from this software without specific prior written permission.
   17  *
   18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
   20  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   21  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
   22  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   23  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   24  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   25  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   26  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   27  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
   28  * THE POSSIBILITY OF SUCH DAMAGE.
   29  */
   30 
   31 /* $KAME: sctp_pcb.c,v 1.38 2005/03/06 16:04:18 itojun Exp $     */
   32 
   33 #include <sys/cdefs.h>
   34 __FBSDID("$FreeBSD: releng/7.3/sys/netinet/sctp_pcb.c 202713 2010-01-20 18:58:23Z tuexen $");
   35 
   36 #include <netinet/sctp_os.h>
   37 #include <sys/proc.h>
   38 #include <netinet/sctp_var.h>
   39 #include <netinet/sctp_sysctl.h>
   40 #include <netinet/sctp_pcb.h>
   41 #include <netinet/sctputil.h>
   42 #include <netinet/sctp.h>
   43 #include <netinet/sctp_header.h>
   44 #include <netinet/sctp_asconf.h>
   45 #include <netinet/sctp_output.h>
   46 #include <netinet/sctp_timer.h>
   47 #include <netinet/sctp_bsd_addr.h>
   48 #include <netinet/udp.h>
   49 
   50 
   51 struct sctp_base_info system_base_info;
   52 
   53 /* FIX: we don't handle multiple link local scopes */
   54 /* "scopeless" replacement IN6_ARE_ADDR_EQUAL */
   55 #ifdef INET6
   56 int
   57 SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 *a, struct sockaddr_in6 *b)
   58 {
   59         struct sockaddr_in6 tmp_a, tmp_b;
   60 
   61         memcpy(&tmp_a, a, sizeof(struct sockaddr_in6));
   62         if (sa6_embedscope(&tmp_a, MODULE_GLOBAL(MOD_INET6, MODULE_GLOBAL(MOD_INET6, ip6_use_defzone))) != 0) {
   63                 return 0;
   64         }
   65         memcpy(&tmp_b, b, sizeof(struct sockaddr_in6));
   66         if (sa6_embedscope(&tmp_b, MODULE_GLOBAL(MOD_INET6, MODULE_GLOBAL(MOD_INET6, ip6_use_defzone))) != 0) {
   67                 return 0;
   68         }
   69         return (IN6_ARE_ADDR_EQUAL(&tmp_a.sin6_addr, &tmp_b.sin6_addr));
   70 }
   71 
   72 #endif
   73 
   74 void
   75 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb)
   76 {
   77         /*
   78          * We really don't need to lock this, but I will just because it
   79          * does not hurt.
   80          */
   81         SCTP_INP_INFO_RLOCK();
   82         spcb->ep_count = SCTP_BASE_INFO(ipi_count_ep);
   83         spcb->asoc_count = SCTP_BASE_INFO(ipi_count_asoc);
   84         spcb->laddr_count = SCTP_BASE_INFO(ipi_count_laddr);
   85         spcb->raddr_count = SCTP_BASE_INFO(ipi_count_raddr);
   86         spcb->chk_count = SCTP_BASE_INFO(ipi_count_chunk);
   87         spcb->readq_count = SCTP_BASE_INFO(ipi_count_readq);
   88         spcb->stream_oque = SCTP_BASE_INFO(ipi_count_strmoq);
   89         spcb->free_chunks = SCTP_BASE_INFO(ipi_free_chunks);
   90 
   91         SCTP_INP_INFO_RUNLOCK();
   92 }
   93 
   94 /*
   95  * Addresses are added to VRF's (Virtual Router's). For BSD we
   96  * have only the default VRF 0. We maintain a hash list of
   97  * VRF's. Each VRF has its own list of sctp_ifn's. Each of
   98  * these has a list of addresses. When we add a new address
   99  * to a VRF we lookup the ifn/ifn_index, if the ifn does
  100  * not exist we create it and add it to the list of IFN's
  101  * within the VRF. Once we have the sctp_ifn, we add the
  102  * address to the list. So we look something like:
  103  *
  104  * hash-vrf-table
  105  *   vrf-> ifn-> ifn -> ifn
  106  *   vrf    |
  107  *    ...   +--ifa-> ifa -> ifa
  108  *   vrf
  109  *
  110  * We keep these seperate lists since the SCTP subsystem will
  111  * point to these from its source address selection nets structure.
  112  * When an address is deleted it does not happen right away on
  113  * the SCTP side, it gets scheduled. What we do when a
  114  * delete happens is immediately remove the address from
  115  * the master list and decrement the refcount. As our
  116  * addip iterator works through and frees the src address
  117  * selection pointing to the sctp_ifa, eventually the refcount
  118  * will reach 0 and we will delete it. Note that it is assumed
  119  * that any locking on system level ifn/ifa is done at the
  120  * caller of these functions and these routines will only
  121  * lock the SCTP structures as they add or delete things.
  122  *
  123  * Other notes on VRF concepts.
  124  *  - An endpoint can be in multiple VRF's
  125  *  - An association lives within a VRF and only one VRF.
  126  *  - Any incoming packet we can deduce the VRF for by
  127  *    looking at the mbuf/pak inbound (for BSD its VRF=0 :D)
  128  *  - Any downward send call or connect call must supply the
  129  *    VRF via ancillary data or via some sort of set default
  130  *    VRF socket option call (again for BSD no brainer since
  131  *    the VRF is always 0).
  132  *  - An endpoint may add multiple VRF's to it.
  133  *  - Listening sockets can accept associations in any
  134  *    of the VRF's they are in but the assoc will end up
  135  *    in only one VRF (gotten from the packet or connect/send).
  136  *
  137  */
  138 
  139 struct sctp_vrf *
  140 sctp_allocate_vrf(int vrf_id)
  141 {
  142         struct sctp_vrf *vrf = NULL;
  143         struct sctp_vrflist *bucket;
  144 
  145         /* First allocate the VRF structure */
  146         vrf = sctp_find_vrf(vrf_id);
  147         if (vrf) {
  148                 /* Already allocated */
  149                 return (vrf);
  150         }
  151         SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf),
  152             SCTP_M_VRF);
  153         if (vrf == NULL) {
  154                 /* No memory */
  155 #ifdef INVARIANTS
  156                 panic("No memory for VRF:%d", vrf_id);
  157 #endif
  158                 return (NULL);
  159         }
  160         /* setup the VRF */
  161         memset(vrf, 0, sizeof(struct sctp_vrf));
  162         vrf->vrf_id = vrf_id;
  163         LIST_INIT(&vrf->ifnlist);
  164         vrf->total_ifa_count = 0;
  165         vrf->refcount = 0;
  166         /* now also setup table ids */
  167         SCTP_INIT_VRF_TABLEID(vrf);
  168         /* Init the HASH of addresses */
  169         vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE,
  170             &vrf->vrf_addr_hashmark);
  171         if (vrf->vrf_addr_hash == NULL) {
  172                 /* No memory */
  173 #ifdef INVARIANTS
  174                 panic("No memory for VRF:%d", vrf_id);
  175 #endif
  176                 SCTP_FREE(vrf, SCTP_M_VRF);
  177                 return (NULL);
  178         }
  179         /* Add it to the hash table */
  180         bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
  181         LIST_INSERT_HEAD(bucket, vrf, next_vrf);
  182         atomic_add_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
  183         return (vrf);
  184 }
  185 
  186 
  187 struct sctp_ifn *
  188 sctp_find_ifn(void *ifn, uint32_t ifn_index)
  189 {
  190         struct sctp_ifn *sctp_ifnp;
  191         struct sctp_ifnlist *hash_ifn_head;
  192 
  193         /*
  194          * We assume the lock is held for the addresses if thats wrong
  195          * problems could occur :-)
  196          */
  197         hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
  198         LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) {
  199                 if (sctp_ifnp->ifn_index == ifn_index) {
  200                         return (sctp_ifnp);
  201                 }
  202                 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) {
  203                         return (sctp_ifnp);
  204                 }
  205         }
  206         return (NULL);
  207 }
  208 
  209 
  210 
  211 struct sctp_vrf *
  212 sctp_find_vrf(uint32_t vrf_id)
  213 {
  214         struct sctp_vrflist *bucket;
  215         struct sctp_vrf *liste;
  216 
  217         bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
  218         LIST_FOREACH(liste, bucket, next_vrf) {
  219                 if (vrf_id == liste->vrf_id) {
  220                         return (liste);
  221                 }
  222         }
  223         return (NULL);
  224 }
  225 
  226 void
  227 sctp_free_vrf(struct sctp_vrf *vrf)
  228 {
  229         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) {
  230                 /* We zero'd the count */
  231                 if (vrf->vrf_addr_hash) {
  232                       SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
  233                       vrf->vrf_addr_hash = NULL;
  234                 }
  235                 LIST_REMOVE(vrf, next_vrf);
  236                 SCTP_FREE(vrf, SCTP_M_VRF);
  237                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
  238         }
  239 }
  240 
  241 void
  242 sctp_free_ifn(struct sctp_ifn *sctp_ifnp)
  243 {
  244         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) {
  245                 /* We zero'd the count */
  246                 if (sctp_ifnp->vrf) {
  247                         sctp_free_vrf(sctp_ifnp->vrf);
  248                 }
  249                 SCTP_FREE(sctp_ifnp, SCTP_M_IFN);
  250                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
  251         }
  252 }
  253 
  254 void
  255 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu)
  256 {
  257         struct sctp_ifn *sctp_ifnp;
  258 
  259         sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index);
  260         if (sctp_ifnp != NULL) {
  261                 sctp_ifnp->ifn_mtu = mtu;
  262         }
  263 }
  264 
  265 
  266 void
  267 sctp_free_ifa(struct sctp_ifa *sctp_ifap)
  268 {
  269         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) {
  270                 /* We zero'd the count */
  271                 if (sctp_ifap->ifn_p) {
  272                         sctp_free_ifn(sctp_ifap->ifn_p);
  273                 }
  274                 SCTP_FREE(sctp_ifap, SCTP_M_IFA);
  275                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
  276         }
  277 }
  278 
  279 static void
  280 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock)
  281 {
  282         struct sctp_ifn *found;
  283 
  284         found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index);
  285         if (found == NULL) {
  286                 /* Not in the list.. sorry */
  287                 return;
  288         }
  289         if (hold_addr_lock == 0)
  290                 SCTP_IPI_ADDR_WLOCK();
  291         LIST_REMOVE(sctp_ifnp, next_bucket);
  292         LIST_REMOVE(sctp_ifnp, next_ifn);
  293         SCTP_DEREGISTER_INTERFACE(sctp_ifnp->ifn_index,
  294             sctp_ifnp->registered_af);
  295         if (hold_addr_lock == 0)
  296                 SCTP_IPI_ADDR_WUNLOCK();
  297         /* Take away the reference, and possibly free it */
  298         sctp_free_ifn(sctp_ifnp);
  299 }
  300 
  301 void
  302 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr,
  303     const char *if_name, uint32_t ifn_index)
  304 {
  305         struct sctp_vrf *vrf;
  306         struct sctp_ifa *sctp_ifap = NULL;
  307 
  308         SCTP_IPI_ADDR_RLOCK();
  309         vrf = sctp_find_vrf(vrf_id);
  310         if (vrf == NULL) {
  311                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
  312                 goto out;
  313 
  314         }
  315         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
  316         if (sctp_ifap == NULL) {
  317                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
  318                 goto out;
  319         }
  320         if (sctp_ifap->ifn_p == NULL) {
  321                 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n");
  322                 goto out;
  323         }
  324         if (if_name) {
  325                 int len1, len2;
  326 
  327                 len1 = strlen(if_name);
  328                 len2 = strlen(sctp_ifap->ifn_p->ifn_name);
  329                 if (len1 != len2) {
  330                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN of ifa names different lenght %d vs %d - ignored\n",
  331                             len1, len2);
  332                         goto out;
  333                 }
  334                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, len1) != 0) {
  335                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
  336                             sctp_ifap->ifn_p->ifn_name,
  337                             if_name);
  338                         goto out;
  339                 }
  340         } else {
  341                 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
  342                         SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
  343                             sctp_ifap->ifn_p->ifn_index, ifn_index);
  344                         goto out;
  345                 }
  346         }
  347 
  348         sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID);
  349         sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE;
  350 out:
  351         SCTP_IPI_ADDR_RUNLOCK();
  352 }
  353 
  354 void
  355 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr,
  356     const char *if_name, uint32_t ifn_index)
  357 {
  358         struct sctp_vrf *vrf;
  359         struct sctp_ifa *sctp_ifap = NULL;
  360 
  361         SCTP_IPI_ADDR_RLOCK();
  362         vrf = sctp_find_vrf(vrf_id);
  363         if (vrf == NULL) {
  364                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
  365                 goto out;
  366 
  367         }
  368         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
  369         if (sctp_ifap == NULL) {
  370                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
  371                 goto out;
  372         }
  373         if (sctp_ifap->ifn_p == NULL) {
  374                 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n");
  375                 goto out;
  376         }
  377         if (if_name) {
  378                 int len1, len2;
  379 
  380                 len1 = strlen(if_name);
  381                 len2 = strlen(sctp_ifap->ifn_p->ifn_name);
  382                 if (len1 != len2) {
  383                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN of ifa names different lenght %d vs %d - ignored\n",
  384                             len1, len2);
  385                         goto out;
  386                 }
  387                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, len1) != 0) {
  388                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
  389                             sctp_ifap->ifn_p->ifn_name,
  390                             if_name);
  391                         goto out;
  392                 }
  393         } else {
  394                 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
  395                         SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
  396                             sctp_ifap->ifn_p->ifn_index, ifn_index);
  397                         goto out;
  398                 }
  399         }
  400 
  401         sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE);
  402         sctp_ifap->localifa_flags |= SCTP_ADDR_VALID;
  403 out:
  404         SCTP_IPI_ADDR_RUNLOCK();
  405 }
  406 
  407 /*-
  408  * Add an ifa to an ifn.
  409  * Register the interface as necessary.
  410  * NOTE: ADDR write lock MUST be held.
  411  */
  412 static void
  413 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap)
  414 {
  415         int ifa_af;
  416 
  417         LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
  418         sctp_ifap->ifn_p = sctp_ifnp;
  419         atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
  420         /* update address counts */
  421         sctp_ifnp->ifa_count++;
  422         ifa_af = sctp_ifap->address.sa.sa_family;
  423         if (ifa_af == AF_INET)
  424                 sctp_ifnp->num_v4++;
  425         else
  426                 sctp_ifnp->num_v6++;
  427         if (sctp_ifnp->ifa_count == 1) {
  428                 /* register the new interface */
  429                 SCTP_REGISTER_INTERFACE(sctp_ifnp->ifn_index, ifa_af);
  430                 sctp_ifnp->registered_af = ifa_af;
  431         }
  432 }
  433 
  434 /*-
  435  * Remove an ifa from its ifn.
  436  * If no more addresses exist, remove the ifn too. Otherwise, re-register
  437  * the interface based on the remaining address families left.
  438  * NOTE: ADDR write lock MUST be held.
  439  */
  440 static void
  441 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap)
  442 {
  443         uint32_t ifn_index;
  444 
  445         LIST_REMOVE(sctp_ifap, next_ifa);
  446         if (sctp_ifap->ifn_p) {
  447                 /* update address counts */
  448                 sctp_ifap->ifn_p->ifa_count--;
  449                 if (sctp_ifap->address.sa.sa_family == AF_INET6)
  450                         sctp_ifap->ifn_p->num_v6--;
  451                 else if (sctp_ifap->address.sa.sa_family == AF_INET)
  452                         sctp_ifap->ifn_p->num_v4--;
  453 
  454                 ifn_index = sctp_ifap->ifn_p->ifn_index;
  455                 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) {
  456                         /* remove the ifn, possibly freeing it */
  457                         sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED);
  458                 } else {
  459                         /* re-register address family type, if needed */
  460                         if ((sctp_ifap->ifn_p->num_v6 == 0) &&
  461                             (sctp_ifap->ifn_p->registered_af == AF_INET6)) {
  462                                 SCTP_DEREGISTER_INTERFACE(ifn_index, AF_INET6);
  463                                 SCTP_REGISTER_INTERFACE(ifn_index, AF_INET);
  464                                 sctp_ifap->ifn_p->registered_af = AF_INET;
  465                         } else if ((sctp_ifap->ifn_p->num_v4 == 0) &&
  466                             (sctp_ifap->ifn_p->registered_af == AF_INET)) {
  467                                 SCTP_DEREGISTER_INTERFACE(ifn_index, AF_INET);
  468                                 SCTP_REGISTER_INTERFACE(ifn_index, AF_INET6);
  469                                 sctp_ifap->ifn_p->registered_af = AF_INET6;
  470                         }
  471                         /* free the ifn refcount */
  472                         sctp_free_ifn(sctp_ifap->ifn_p);
  473                 }
  474                 sctp_ifap->ifn_p = NULL;
  475         }
  476 }
  477 
  478 struct sctp_ifa *
  479 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index,
  480     uint32_t ifn_type, const char *if_name, void *ifa,
  481     struct sockaddr *addr, uint32_t ifa_flags,
  482     int dynamic_add)
  483 {
  484         struct sctp_vrf *vrf;
  485         struct sctp_ifn *sctp_ifnp = NULL;
  486         struct sctp_ifa *sctp_ifap = NULL;
  487         struct sctp_ifalist *hash_addr_head;
  488         struct sctp_ifnlist *hash_ifn_head;
  489         uint32_t hash_of_addr;
  490         int new_ifn_af = 0;
  491 
  492 #ifdef SCTP_DEBUG
  493         SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id);
  494         SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
  495 #endif
  496         SCTP_IPI_ADDR_WLOCK();
  497         sctp_ifnp = sctp_find_ifn(ifn, ifn_index);
  498         if (sctp_ifnp) {
  499                 vrf = sctp_ifnp->vrf;
  500         } else {
  501                 vrf = sctp_find_vrf(vrf_id);
  502                 if (vrf == NULL) {
  503                         vrf = sctp_allocate_vrf(vrf_id);
  504                         if (vrf == NULL) {
  505                                 SCTP_IPI_ADDR_WUNLOCK();
  506                                 return (NULL);
  507                         }
  508                 }
  509         }
  510         if (sctp_ifnp == NULL) {
  511                 /*
  512                  * build one and add it, can't hold lock until after malloc
  513                  * done though.
  514                  */
  515                 SCTP_IPI_ADDR_WUNLOCK();
  516                 SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *,
  517                     sizeof(struct sctp_ifn), SCTP_M_IFN);
  518                 if (sctp_ifnp == NULL) {
  519 #ifdef INVARIANTS
  520                         panic("No memory for IFN:%u", sctp_ifnp->ifn_index);
  521 #endif
  522                         return (NULL);
  523                 }
  524                 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn));
  525                 sctp_ifnp->ifn_index = ifn_index;
  526                 sctp_ifnp->ifn_p = ifn;
  527                 sctp_ifnp->ifn_type = ifn_type;
  528                 sctp_ifnp->refcount = 0;
  529                 sctp_ifnp->vrf = vrf;
  530                 atomic_add_int(&vrf->refcount, 1);
  531                 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family);
  532                 if (if_name != NULL) {
  533                         memcpy(sctp_ifnp->ifn_name, if_name, SCTP_IFNAMSIZ);
  534                 } else {
  535                         memcpy(sctp_ifnp->ifn_name, "unknown", min(7, SCTP_IFNAMSIZ));
  536                 }
  537                 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
  538                 LIST_INIT(&sctp_ifnp->ifalist);
  539                 SCTP_IPI_ADDR_WLOCK();
  540                 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket);
  541                 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn);
  542                 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
  543                 new_ifn_af = 1;
  544         }
  545         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
  546         if (sctp_ifap) {
  547                 /* Hmm, it already exists? */
  548                 if ((sctp_ifap->ifn_p) &&
  549                     (sctp_ifap->ifn_p->ifn_index == ifn_index)) {
  550                         SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n",
  551                             sctp_ifap->ifn_p->ifn_name, ifn_index,
  552                             sctp_ifap);
  553                         if (new_ifn_af) {
  554                                 /* Remove the created one that we don't want */
  555                                 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED);
  556                         }
  557                         if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) {
  558                                 /* easy to solve, just switch back to active */
  559                                 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n");
  560                                 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
  561                                 sctp_ifap->ifn_p = sctp_ifnp;
  562                                 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
  563                         }
  564         exit_stage_left:
  565                         SCTP_IPI_ADDR_WUNLOCK();
  566                         return (sctp_ifap);
  567                 } else {
  568                         if (sctp_ifap->ifn_p) {
  569                                 /*
  570                                  * The last IFN gets the address, removee
  571                                  * the old one
  572                                  */
  573                                 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n",
  574                                     sctp_ifap, sctp_ifap->ifn_p->ifn_name,
  575                                     sctp_ifap->ifn_p->ifn_index, if_name,
  576                                     ifn_index);
  577                                 /* remove the address from the old ifn */
  578                                 sctp_remove_ifa_from_ifn(sctp_ifap);
  579                                 /* move the address over to the new ifn */
  580                                 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
  581                                 goto exit_stage_left;
  582                         } else {
  583                                 /* repair ifnp which was NULL ? */
  584                                 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
  585                                 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n",
  586                                     sctp_ifnp, sctp_ifap);
  587                                 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
  588                         }
  589                         goto exit_stage_left;
  590                 }
  591         }
  592         SCTP_IPI_ADDR_WUNLOCK();
  593         SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA);
  594         if (sctp_ifap == NULL) {
  595 #ifdef INVARIANTS
  596                 panic("No memory for IFA");
  597 #endif
  598                 return (NULL);
  599         }
  600         memset(sctp_ifap, 0, sizeof(struct sctp_ifa));
  601         sctp_ifap->ifn_p = sctp_ifnp;
  602         atomic_add_int(&sctp_ifnp->refcount, 1);
  603         sctp_ifap->vrf_id = vrf_id;
  604         sctp_ifap->ifa = ifa;
  605         memcpy(&sctp_ifap->address, addr, addr->sa_len);
  606         sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE;
  607         sctp_ifap->flags = ifa_flags;
  608         /* Set scope */
  609         switch (sctp_ifap->address.sa.sa_family) {
  610         case AF_INET:
  611                 {
  612                         struct sockaddr_in *sin;
  613 
  614                         sin = (struct sockaddr_in *)&sctp_ifap->address.sin;
  615                         if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
  616                             (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) {
  617                                 sctp_ifap->src_is_loop = 1;
  618                         }
  619                         if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
  620                                 sctp_ifap->src_is_priv = 1;
  621                         }
  622                         sctp_ifnp->num_v4++;
  623                         if (new_ifn_af)
  624                                 new_ifn_af = AF_INET;
  625                         break;
  626                 }
  627 #ifdef INET6
  628         case AF_INET6:
  629                 {
  630                         /* ok to use deprecated addresses? */
  631                         struct sockaddr_in6 *sin6;
  632 
  633                         sin6 = (struct sockaddr_in6 *)&sctp_ifap->address.sin6;
  634                         if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
  635                             (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) {
  636                                 sctp_ifap->src_is_loop = 1;
  637                         }
  638                         if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
  639                                 sctp_ifap->src_is_priv = 1;
  640                         }
  641                         sctp_ifnp->num_v6++;
  642                         if (new_ifn_af)
  643                                 new_ifn_af = AF_INET6;
  644                         break;
  645                 }
  646 #endif
  647         default:
  648                 new_ifn_af = 0;
  649                 break;
  650         }
  651         hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa);
  652 
  653         if ((sctp_ifap->src_is_priv == 0) &&
  654             (sctp_ifap->src_is_loop == 0)) {
  655                 sctp_ifap->src_is_glob = 1;
  656         }
  657         SCTP_IPI_ADDR_WLOCK();
  658         hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)];
  659         LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket);
  660         sctp_ifap->refcount = 1;
  661         LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
  662         sctp_ifnp->ifa_count++;
  663         vrf->total_ifa_count++;
  664         atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
  665         if (new_ifn_af) {
  666                 SCTP_REGISTER_INTERFACE(ifn_index, new_ifn_af);
  667                 sctp_ifnp->registered_af = new_ifn_af;
  668         }
  669         SCTP_IPI_ADDR_WUNLOCK();
  670         if (dynamic_add) {
  671                 /*
  672                  * Bump up the refcount so that when the timer completes it
  673                  * will drop back down.
  674                  */
  675                 struct sctp_laddr *wi;
  676 
  677                 atomic_add_int(&sctp_ifap->refcount, 1);
  678                 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
  679                 if (wi == NULL) {
  680                         /*
  681                          * Gak, what can we do? We have lost an address
  682                          * change can you say HOSED?
  683                          */
  684                         SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
  685                         /* Opps, must decrement the count */
  686                         sctp_del_addr_from_vrf(vrf_id, addr, ifn_index,
  687                             if_name);
  688                         return (NULL);
  689                 }
  690                 SCTP_INCR_LADDR_COUNT();
  691                 bzero(wi, sizeof(*wi));
  692                 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
  693                 wi->ifa = sctp_ifap;
  694                 wi->action = SCTP_ADD_IP_ADDRESS;
  695                 SCTP_IPI_ITERATOR_WQ_LOCK();
  696                 /*
  697                  * Should this really be a tailq? As it is we will process
  698                  * the newest first :-0
  699                  */
  700                 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
  701                 SCTP_IPI_ITERATOR_WQ_UNLOCK();
  702                 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
  703                     (struct sctp_inpcb *)NULL,
  704                     (struct sctp_tcb *)NULL,
  705                     (struct sctp_nets *)NULL);
  706         } else {
  707                 /* it's ready for use */
  708                 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
  709         }
  710         return (sctp_ifap);
  711 }
  712 
  713 void
  714 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr,
  715     uint32_t ifn_index, const char *if_name)
  716 {
  717         struct sctp_vrf *vrf;
  718         struct sctp_ifa *sctp_ifap = NULL;
  719 
  720         SCTP_IPI_ADDR_WLOCK();
  721         vrf = sctp_find_vrf(vrf_id);
  722         if (vrf == NULL) {
  723                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
  724                 goto out_now;
  725         }
  726 #ifdef SCTP_DEBUG
  727         SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id);
  728         SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
  729 #endif
  730         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
  731         if (sctp_ifap) {
  732                 /* Validate the delete */
  733                 if (sctp_ifap->ifn_p) {
  734                         int valid = 0;
  735 
  736                         /*-
  737                          * The name has priority over the ifn_index
  738                          * if its given. We do this especially for
  739                          * panda who might recycle indexes fast.
  740                          */
  741                         if (if_name) {
  742                                 int len1, len2;
  743 
  744                                 len1 = min(SCTP_IFNAMSIZ, strlen(if_name));
  745                                 len2 = min(SCTP_IFNAMSIZ, strlen(sctp_ifap->ifn_p->ifn_name));
  746                                 if (len1 && len2 && (len1 == len2)) {
  747                                         /* we can compare them */
  748                                         if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, len1) == 0) {
  749                                                 /*
  750                                                  * They match its a correct
  751                                                  * delete
  752                                                  */
  753                                                 valid = 1;
  754                                         }
  755                                 }
  756                         }
  757                         if (!valid) {
  758                                 /* last ditch check ifn_index */
  759                                 if (ifn_index == sctp_ifap->ifn_p->ifn_index) {
  760                                         valid = 1;
  761                                 }
  762                         }
  763                         if (!valid) {
  764                                 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n",
  765                                     ifn_index, ((if_name == NULL) ? "NULL" : if_name));
  766                                 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n",
  767                                     sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name);
  768                                 SCTP_IPI_ADDR_WUNLOCK();
  769                                 return;
  770                         }
  771                 }
  772                 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", sctp_ifap);
  773                 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID;
  774                 sctp_ifap->localifa_flags |= SCTP_BEING_DELETED;
  775                 vrf->total_ifa_count--;
  776                 LIST_REMOVE(sctp_ifap, next_bucket);
  777                 sctp_remove_ifa_from_ifn(sctp_ifap);
  778         }
  779 #ifdef SCTP_DEBUG
  780         else {
  781                 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:",
  782                     ifn_index);
  783                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
  784         }
  785 #endif
  786 
  787 out_now:
  788         SCTP_IPI_ADDR_WUNLOCK();
  789         if (sctp_ifap) {
  790                 struct sctp_laddr *wi;
  791 
  792                 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
  793                 if (wi == NULL) {
  794                         /*
  795                          * Gak, what can we do? We have lost an address
  796                          * change can you say HOSED?
  797                          */
  798                         SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
  799 
  800                         /* Oops, must decrement the count */
  801                         sctp_free_ifa(sctp_ifap);
  802                         return;
  803                 }
  804                 SCTP_INCR_LADDR_COUNT();
  805                 bzero(wi, sizeof(*wi));
  806                 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
  807                 wi->ifa = sctp_ifap;
  808                 wi->action = SCTP_DEL_IP_ADDRESS;
  809                 SCTP_IPI_ITERATOR_WQ_LOCK();
  810                 /*
  811                  * Should this really be a tailq? As it is we will process
  812                  * the newest first :-0
  813                  */
  814                 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
  815                 SCTP_IPI_ITERATOR_WQ_UNLOCK();
  816 
  817                 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
  818                     (struct sctp_inpcb *)NULL,
  819                     (struct sctp_tcb *)NULL,
  820                     (struct sctp_nets *)NULL);
  821         }
  822         return;
  823 }
  824 
  825 
  826 static struct sctp_tcb *
  827 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from,
  828     struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id)
  829 {
  830         /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */
  831         /*
  832          * If we support the TCP model, then we must now dig through to see
  833          * if we can find our endpoint in the list of tcp ep's.
  834          */
  835         uint16_t lport, rport;
  836         struct sctppcbhead *ephead;
  837         struct sctp_inpcb *inp;
  838         struct sctp_laddr *laddr;
  839         struct sctp_tcb *stcb;
  840         struct sctp_nets *net;
  841 
  842         if ((to == NULL) || (from == NULL)) {
  843                 return (NULL);
  844         }
  845         if (to->sa_family == AF_INET && from->sa_family == AF_INET) {
  846                 lport = ((struct sockaddr_in *)to)->sin_port;
  847                 rport = ((struct sockaddr_in *)from)->sin_port;
  848         } else if (to->sa_family == AF_INET6 && from->sa_family == AF_INET6) {
  849                 lport = ((struct sockaddr_in6 *)to)->sin6_port;
  850                 rport = ((struct sockaddr_in6 *)from)->sin6_port;
  851         } else {
  852                 return NULL;
  853         }
  854         ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport), SCTP_BASE_INFO(hashtcpmark))];
  855         /*
  856          * Ok now for each of the guys in this bucket we must look and see:
  857          * - Does the remote port match. - Does there single association's
  858          * addresses match this address (to). If so we update p_ep to point
  859          * to this ep and return the tcb from it.
  860          */
  861         LIST_FOREACH(inp, ephead, sctp_hash) {
  862                 SCTP_INP_RLOCK(inp);
  863                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
  864                         SCTP_INP_RUNLOCK(inp);
  865                         continue;
  866                 }
  867                 if (lport != inp->sctp_lport) {
  868                         SCTP_INP_RUNLOCK(inp);
  869                         continue;
  870                 }
  871                 if (inp->def_vrf_id != vrf_id) {
  872                         SCTP_INP_RUNLOCK(inp);
  873                         continue;
  874                 }
  875                 /* check to see if the ep has one of the addresses */
  876                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
  877                         /* We are NOT bound all, so look further */
  878                         int match = 0;
  879 
  880                         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
  881 
  882                                 if (laddr->ifa == NULL) {
  883                                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __FUNCTION__);
  884                                         continue;
  885                                 }
  886                                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
  887                                         SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
  888                                         continue;
  889                                 }
  890                                 if (laddr->ifa->address.sa.sa_family ==
  891                                     to->sa_family) {
  892                                         /* see if it matches */
  893                                         struct sockaddr_in *intf_addr, *sin;
  894 
  895                                         intf_addr = &laddr->ifa->address.sin;
  896                                         sin = (struct sockaddr_in *)to;
  897                                         if (from->sa_family == AF_INET) {
  898                                                 if (sin->sin_addr.s_addr ==
  899                                                     intf_addr->sin_addr.s_addr) {
  900                                                         match = 1;
  901                                                         break;
  902                                                 }
  903                                         }
  904 #ifdef INET6
  905                                         if (from->sa_family == AF_INET6) {
  906                                                 struct sockaddr_in6 *intf_addr6;
  907                                                 struct sockaddr_in6 *sin6;
  908 
  909                                                 sin6 = (struct sockaddr_in6 *)
  910                                                     to;
  911                                                 intf_addr6 = &laddr->ifa->address.sin6;
  912 
  913                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
  914                                                     intf_addr6)) {
  915                                                         match = 1;
  916                                                         break;
  917                                                 }
  918                                         }
  919 #endif
  920                                 }
  921                         }
  922                         if (match == 0) {
  923                                 /* This endpoint does not have this address */
  924                                 SCTP_INP_RUNLOCK(inp);
  925                                 continue;
  926                         }
  927                 }
  928                 /*
  929                  * Ok if we hit here the ep has the address, does it hold
  930                  * the tcb?
  931                  */
  932 
  933                 stcb = LIST_FIRST(&inp->sctp_asoc_list);
  934                 if (stcb == NULL) {
  935                         SCTP_INP_RUNLOCK(inp);
  936                         continue;
  937                 }
  938                 SCTP_TCB_LOCK(stcb);
  939                 if (stcb->rport != rport) {
  940                         /* remote port does not match. */
  941                         SCTP_TCB_UNLOCK(stcb);
  942                         SCTP_INP_RUNLOCK(inp);
  943                         continue;
  944                 }
  945                 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
  946                         SCTP_TCB_UNLOCK(stcb);
  947                         SCTP_INP_RUNLOCK(inp);
  948                         continue;
  949                 }
  950                 /* Does this TCB have a matching address? */
  951                 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
  952 
  953                         if (net->ro._l_addr.sa.sa_family != from->sa_family) {
  954                                 /* not the same family, can't be a match */
  955                                 continue;
  956                         }
  957                         switch (from->sa_family) {
  958                         case AF_INET:
  959                                 {
  960                                         struct sockaddr_in *sin, *rsin;
  961 
  962                                         sin = (struct sockaddr_in *)&net->ro._l_addr;
  963                                         rsin = (struct sockaddr_in *)from;
  964                                         if (sin->sin_addr.s_addr ==
  965                                             rsin->sin_addr.s_addr) {
  966                                                 /* found it */
  967                                                 if (netp != NULL) {
  968                                                         *netp = net;
  969                                                 }
  970                                                 /*
  971                                                  * Update the endpoint
  972                                                  * pointer
  973                                                  */
  974                                                 *inp_p = inp;
  975                                                 SCTP_INP_RUNLOCK(inp);
  976                                                 return (stcb);
  977                                         }
  978                                         break;
  979                                 }
  980 #ifdef INET6
  981                         case AF_INET6:
  982                                 {
  983                                         struct sockaddr_in6 *sin6, *rsin6;
  984 
  985                                         sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
  986                                         rsin6 = (struct sockaddr_in6 *)from;
  987                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
  988                                             rsin6)) {
  989                                                 /* found it */
  990                                                 if (netp != NULL) {
  991                                                         *netp = net;
  992                                                 }
  993                                                 /*
  994                                                  * Update the endpoint
  995                                                  * pointer
  996                                                  */
  997                                                 *inp_p = inp;
  998                                                 SCTP_INP_RUNLOCK(inp);
  999                                                 return (stcb);
 1000                                         }
 1001                                         break;
 1002                                 }
 1003 #endif
 1004                         default:
 1005                                 /* TSNH */
 1006                                 break;
 1007                         }
 1008                 }
 1009                 SCTP_TCB_UNLOCK(stcb);
 1010                 SCTP_INP_RUNLOCK(inp);
 1011         }
 1012         return (NULL);
 1013 }
 1014 
 1015 /*
 1016  * rules for use
 1017  *
 1018  * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an
 1019  * stcb, both will be locked (locked_tcb and stcb) but decrement will be done
 1020  * (if locked == NULL). 3) Decrement happens on return ONLY if locked ==
 1021  * NULL.
 1022  */
 1023 
 1024 struct sctp_tcb *
 1025 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote,
 1026     struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb)
 1027 {
 1028         struct sctpasochead *head;
 1029         struct sctp_inpcb *inp;
 1030         struct sctp_tcb *stcb = NULL;
 1031         struct sctp_nets *net;
 1032         uint16_t rport;
 1033 
 1034         inp = *inp_p;
 1035         if (remote->sa_family == AF_INET) {
 1036                 rport = (((struct sockaddr_in *)remote)->sin_port);
 1037         } else if (remote->sa_family == AF_INET6) {
 1038                 rport = (((struct sockaddr_in6 *)remote)->sin6_port);
 1039         } else {
 1040                 return (NULL);
 1041         }
 1042         if (locked_tcb) {
 1043                 /*
 1044                  * UN-lock so we can do proper locking here this occurs when
 1045                  * called from load_addresses_from_init.
 1046                  */
 1047                 atomic_add_int(&locked_tcb->asoc.refcnt, 1);
 1048                 SCTP_TCB_UNLOCK(locked_tcb);
 1049         }
 1050         SCTP_INP_INFO_RLOCK();
 1051         if (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
 1052                 /*-
 1053                  * Now either this guy is our listener or it's the
 1054                  * connector. If it is the one that issued the connect, then
 1055                  * it's only chance is to be the first TCB in the list. If
 1056                  * it is the acceptor, then do the special_lookup to hash
 1057                  * and find the real inp.
 1058                  */
 1059                 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) {
 1060                         /* to is peer addr, from is my addr */
 1061                         stcb = sctp_tcb_special_locate(inp_p, remote, local,
 1062                             netp, inp->def_vrf_id);
 1063                         if ((stcb != NULL) && (locked_tcb == NULL)) {
 1064                                 /* we have a locked tcb, lower refcount */
 1065                                 SCTP_INP_DECR_REF(inp);
 1066                         }
 1067                         if ((locked_tcb != NULL) && (locked_tcb != stcb)) {
 1068                                 SCTP_INP_RLOCK(locked_tcb->sctp_ep);
 1069                                 SCTP_TCB_LOCK(locked_tcb);
 1070                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
 1071                                 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep);
 1072                         }
 1073                         SCTP_INP_INFO_RUNLOCK();
 1074                         return (stcb);
 1075                 } else {
 1076                         SCTP_INP_WLOCK(inp);
 1077                         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
 1078                                 goto null_return;
 1079                         }
 1080                         stcb = LIST_FIRST(&inp->sctp_asoc_list);
 1081                         if (stcb == NULL) {
 1082                                 goto null_return;
 1083                         }
 1084                         SCTP_TCB_LOCK(stcb);
 1085 
 1086                         if (stcb->rport != rport) {
 1087                                 /* remote port does not match. */
 1088                                 SCTP_TCB_UNLOCK(stcb);
 1089                                 goto null_return;
 1090                         }
 1091                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
 1092                                 SCTP_TCB_UNLOCK(stcb);
 1093                                 goto null_return;
 1094                         }
 1095                         /* now look at the list of remote addresses */
 1096                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 1097 #ifdef INVARIANTS
 1098                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
 1099                                         panic("Corrupt net list");
 1100                                 }
 1101 #endif
 1102                                 if (net->ro._l_addr.sa.sa_family !=
 1103                                     remote->sa_family) {
 1104                                         /* not the same family */
 1105                                         continue;
 1106                                 }
 1107                                 switch (remote->sa_family) {
 1108                                 case AF_INET:
 1109                                         {
 1110                                                 struct sockaddr_in *sin,
 1111                                                            *rsin;
 1112 
 1113                                                 sin = (struct sockaddr_in *)
 1114                                                     &net->ro._l_addr;
 1115                                                 rsin = (struct sockaddr_in *)remote;
 1116                                                 if (sin->sin_addr.s_addr ==
 1117                                                     rsin->sin_addr.s_addr) {
 1118                                                         /* found it */
 1119                                                         if (netp != NULL) {
 1120                                                                 *netp = net;
 1121                                                         }
 1122                                                         if (locked_tcb == NULL) {
 1123                                                                 SCTP_INP_DECR_REF(inp);
 1124                                                         } else if (locked_tcb != stcb) {
 1125                                                                 SCTP_TCB_LOCK(locked_tcb);
 1126                                                         }
 1127                                                         if (locked_tcb) {
 1128                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
 1129                                                         }
 1130                                                         SCTP_INP_WUNLOCK(inp);
 1131                                                         SCTP_INP_INFO_RUNLOCK();
 1132                                                         return (stcb);
 1133                                                 }
 1134                                                 break;
 1135                                         }
 1136 #ifdef INET6
 1137                                 case AF_INET6:
 1138                                         {
 1139                                                 struct sockaddr_in6 *sin6,
 1140                                                             *rsin6;
 1141 
 1142                                                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
 1143                                                 rsin6 = (struct sockaddr_in6 *)remote;
 1144                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
 1145                                                     rsin6)) {
 1146                                                         /* found it */
 1147                                                         if (netp != NULL) {
 1148                                                                 *netp = net;
 1149                                                         }
 1150                                                         if (locked_tcb == NULL) {
 1151                                                                 SCTP_INP_DECR_REF(inp);
 1152                                                         } else if (locked_tcb != stcb) {
 1153                                                                 SCTP_TCB_LOCK(locked_tcb);
 1154                                                         }
 1155                                                         if (locked_tcb) {
 1156                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
 1157                                                         }
 1158                                                         SCTP_INP_WUNLOCK(inp);
 1159                                                         SCTP_INP_INFO_RUNLOCK();
 1160                                                         return (stcb);
 1161                                                 }
 1162                                                 break;
 1163                                         }
 1164 #endif
 1165                                 default:
 1166                                         /* TSNH */
 1167                                         break;
 1168                                 }
 1169                         }
 1170                         SCTP_TCB_UNLOCK(stcb);
 1171                 }
 1172         } else {
 1173                 SCTP_INP_WLOCK(inp);
 1174                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
 1175                         goto null_return;
 1176                 }
 1177                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport,
 1178                     inp->sctp_hashmark)];
 1179                 if (head == NULL) {
 1180                         goto null_return;
 1181                 }
 1182                 LIST_FOREACH(stcb, head, sctp_tcbhash) {
 1183                         if (stcb->rport != rport) {
 1184                                 /* remote port does not match */
 1185                                 continue;
 1186                         }
 1187                         SCTP_TCB_LOCK(stcb);
 1188                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
 1189                                 SCTP_TCB_UNLOCK(stcb);
 1190                                 continue;
 1191                         }
 1192                         /* now look at the list of remote addresses */
 1193                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 1194 #ifdef INVARIANTS
 1195                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
 1196                                         panic("Corrupt net list");
 1197                                 }
 1198 #endif
 1199                                 if (net->ro._l_addr.sa.sa_family !=
 1200                                     remote->sa_family) {
 1201                                         /* not the same family */
 1202                                         continue;
 1203                                 }
 1204                                 switch (remote->sa_family) {
 1205                                 case AF_INET:
 1206                                         {
 1207                                                 struct sockaddr_in *sin,
 1208                                                            *rsin;
 1209 
 1210                                                 sin = (struct sockaddr_in *)
 1211                                                     &net->ro._l_addr;
 1212                                                 rsin = (struct sockaddr_in *)remote;
 1213                                                 if (sin->sin_addr.s_addr ==
 1214                                                     rsin->sin_addr.s_addr) {
 1215                                                         /* found it */
 1216                                                         if (netp != NULL) {
 1217                                                                 *netp = net;
 1218                                                         }
 1219                                                         if (locked_tcb == NULL) {
 1220                                                                 SCTP_INP_DECR_REF(inp);
 1221                                                         } else if (locked_tcb != stcb) {
 1222                                                                 SCTP_TCB_LOCK(locked_tcb);
 1223                                                         }
 1224                                                         if (locked_tcb) {
 1225                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
 1226                                                         }
 1227                                                         SCTP_INP_WUNLOCK(inp);
 1228                                                         SCTP_INP_INFO_RUNLOCK();
 1229                                                         return (stcb);
 1230                                                 }
 1231                                                 break;
 1232                                         }
 1233 #ifdef INET6
 1234                                 case AF_INET6:
 1235                                         {
 1236                                                 struct sockaddr_in6 *sin6,
 1237                                                             *rsin6;
 1238 
 1239                                                 sin6 = (struct sockaddr_in6 *)
 1240                                                     &net->ro._l_addr;
 1241                                                 rsin6 = (struct sockaddr_in6 *)remote;
 1242                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
 1243                                                     rsin6)) {
 1244                                                         /* found it */
 1245                                                         if (netp != NULL) {
 1246                                                                 *netp = net;
 1247                                                         }
 1248                                                         if (locked_tcb == NULL) {
 1249                                                                 SCTP_INP_DECR_REF(inp);
 1250                                                         } else if (locked_tcb != stcb) {
 1251                                                                 SCTP_TCB_LOCK(locked_tcb);
 1252                                                         }
 1253                                                         if (locked_tcb) {
 1254                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
 1255                                                         }
 1256                                                         SCTP_INP_WUNLOCK(inp);
 1257                                                         SCTP_INP_INFO_RUNLOCK();
 1258                                                         return (stcb);
 1259                                                 }
 1260                                                 break;
 1261                                         }
 1262 #endif
 1263                                 default:
 1264                                         /* TSNH */
 1265                                         break;
 1266                                 }
 1267                         }
 1268                         SCTP_TCB_UNLOCK(stcb);
 1269                 }
 1270         }
 1271 null_return:
 1272         /* clean up for returning null */
 1273         if (locked_tcb) {
 1274                 SCTP_TCB_LOCK(locked_tcb);
 1275                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
 1276         }
 1277         SCTP_INP_WUNLOCK(inp);
 1278         SCTP_INP_INFO_RUNLOCK();
 1279         /* not found */
 1280         return (NULL);
 1281 }
 1282 
 1283 /*
 1284  * Find an association for a specific endpoint using the association id given
 1285  * out in the COMM_UP notification
 1286  */
 1287 
 1288 struct sctp_tcb *
 1289 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
 1290 {
 1291         /*
 1292          * Use my the assoc_id to find a endpoint
 1293          */
 1294         struct sctpasochead *head;
 1295         struct sctp_tcb *stcb;
 1296         uint32_t id;
 1297 
 1298         if (inp == NULL) {
 1299                 SCTP_PRINTF("TSNH ep_associd\n");
 1300                 return (NULL);
 1301         }
 1302         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
 1303                 SCTP_PRINTF("TSNH ep_associd0\n");
 1304                 return (NULL);
 1305         }
 1306         id = (uint32_t) asoc_id;
 1307         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
 1308         if (head == NULL) {
 1309                 /* invalid id TSNH */
 1310                 SCTP_PRINTF("TSNH ep_associd1\n");
 1311                 return (NULL);
 1312         }
 1313         LIST_FOREACH(stcb, head, sctp_tcbasocidhash) {
 1314                 if (stcb->asoc.assoc_id == id) {
 1315                         if (inp != stcb->sctp_ep) {
 1316                                 /*
 1317                                  * some other guy has the same id active (id
 1318                                  * collision ??).
 1319                                  */
 1320                                 SCTP_PRINTF("TSNH ep_associd2\n");
 1321                                 continue;
 1322                         }
 1323                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
 1324                                 continue;
 1325                         }
 1326                         if (want_lock) {
 1327                                 SCTP_TCB_LOCK(stcb);
 1328                         }
 1329                         return (stcb);
 1330                 }
 1331         }
 1332         return (NULL);
 1333 }
 1334 
 1335 
 1336 struct sctp_tcb *
 1337 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
 1338 {
 1339         struct sctp_tcb *stcb;
 1340 
 1341         SCTP_INP_RLOCK(inp);
 1342         stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock);
 1343         SCTP_INP_RUNLOCK(inp);
 1344         return (stcb);
 1345 }
 1346 
 1347 
 1348 static struct sctp_inpcb *
 1349 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head,
 1350     uint16_t lport, uint32_t vrf_id)
 1351 {
 1352         struct sctp_inpcb *inp;
 1353         struct sockaddr_in *sin;
 1354 
 1355 #ifdef INET6
 1356         struct sockaddr_in6 *sin6;
 1357 
 1358 #endif
 1359         struct sctp_laddr *laddr;
 1360 
 1361 #ifdef INET6
 1362         struct sockaddr_in6 *intf_addr6;
 1363 
 1364 #endif
 1365 
 1366         int fnd;
 1367 
 1368         /*
 1369          * Endpoing probe expects that the INP_INFO is locked.
 1370          */
 1371         sin = NULL;
 1372 #ifdef INET6
 1373         sin6 = NULL;
 1374 #endif
 1375         switch (nam->sa_family) {
 1376         case AF_INET:
 1377                 sin = (struct sockaddr_in *)nam;
 1378                 break;
 1379 #ifdef INET6
 1380         case AF_INET6:
 1381                 sin6 = (struct sockaddr_in6 *)nam;
 1382                 break;
 1383 #endif
 1384         default:
 1385                 /* unsupported family */
 1386                 return (NULL);
 1387         }
 1388 
 1389         if (head == NULL)
 1390                 return (NULL);
 1391 
 1392         LIST_FOREACH(inp, head, sctp_hash) {
 1393                 SCTP_INP_RLOCK(inp);
 1394                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
 1395                         SCTP_INP_RUNLOCK(inp);
 1396                         continue;
 1397                 }
 1398                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) &&
 1399                     (inp->sctp_lport == lport)) {
 1400                         /* got it */
 1401                         if ((nam->sa_family == AF_INET) &&
 1402                             (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
 1403                             SCTP_IPV6_V6ONLY(inp)) {
 1404                                 /* IPv4 on a IPv6 socket with ONLY IPv6 set */
 1405                                 SCTP_INP_RUNLOCK(inp);
 1406                                 continue;
 1407                         }
 1408                         /* A V6 address and the endpoint is NOT bound V6 */
 1409                         if (nam->sa_family == AF_INET6 &&
 1410                             (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
 1411                                 SCTP_INP_RUNLOCK(inp);
 1412                                 continue;
 1413                         }
 1414                         /* does a VRF id match? */
 1415                         fnd = 0;
 1416                         if (inp->def_vrf_id == vrf_id)
 1417                                 fnd = 1;
 1418 
 1419                         SCTP_INP_RUNLOCK(inp);
 1420                         if (!fnd)
 1421                                 continue;
 1422                         return (inp);
 1423                 }
 1424                 SCTP_INP_RUNLOCK(inp);
 1425         }
 1426         if ((nam->sa_family == AF_INET) &&
 1427             (sin->sin_addr.s_addr == INADDR_ANY)) {
 1428                 /* Can't hunt for one that has no address specified */
 1429                 return (NULL);
 1430         }
 1431 #ifdef INET6
 1432         if ((nam->sa_family == AF_INET6) &&
 1433             (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) {
 1434                 /* Can't hunt for one that has no address specified */
 1435                 return (NULL);
 1436         }
 1437 #endif
 1438         /*
 1439          * ok, not bound to all so see if we can find a EP bound to this
 1440          * address.
 1441          */
 1442         LIST_FOREACH(inp, head, sctp_hash) {
 1443                 SCTP_INP_RLOCK(inp);
 1444                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
 1445                         SCTP_INP_RUNLOCK(inp);
 1446                         continue;
 1447                 }
 1448                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) {
 1449                         SCTP_INP_RUNLOCK(inp);
 1450                         continue;
 1451                 }
 1452                 /*
 1453                  * Ok this could be a likely candidate, look at all of its
 1454                  * addresses
 1455                  */
 1456                 if (inp->sctp_lport != lport) {
 1457                         SCTP_INP_RUNLOCK(inp);
 1458                         continue;
 1459                 }
 1460                 /* does a VRF id match? */
 1461                 fnd = 0;
 1462                 if (inp->def_vrf_id == vrf_id)
 1463                         fnd = 1;
 1464 
 1465                 if (!fnd) {
 1466                         SCTP_INP_RUNLOCK(inp);
 1467                         continue;
 1468                 }
 1469                 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
 1470                         if (laddr->ifa == NULL) {
 1471                                 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
 1472                                     __FUNCTION__);
 1473                                 continue;
 1474                         }
 1475                         SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ",
 1476                             laddr->ifa);
 1477                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
 1478                                 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n");
 1479                                 continue;
 1480                         }
 1481                         if (laddr->ifa->address.sa.sa_family == nam->sa_family) {
 1482                                 /* possible, see if it matches */
 1483                                 struct sockaddr_in *intf_addr;
 1484 
 1485                                 intf_addr = &laddr->ifa->address.sin;
 1486                                 switch (nam->sa_family) {
 1487                                 case AF_INET:
 1488                                         if (sin->sin_addr.s_addr ==
 1489                                             intf_addr->sin_addr.s_addr) {
 1490                                                 SCTP_INP_RUNLOCK(inp);
 1491                                                 return (inp);
 1492                                         }
 1493                                         break;
 1494 #ifdef INET6
 1495                                 case AF_INET6:
 1496                                         intf_addr6 = &laddr->ifa->address.sin6;
 1497                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
 1498                                             intf_addr6)) {
 1499                                                 SCTP_INP_RUNLOCK(inp);
 1500                                                 return (inp);
 1501                                         }
 1502                                         break;
 1503 #endif
 1504                                 }
 1505                         }
 1506                 }
 1507                 SCTP_INP_RUNLOCK(inp);
 1508         }
 1509         return (NULL);
 1510 }
 1511 
 1512 
 1513 static struct sctp_inpcb *
 1514 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id)
 1515 {
 1516         struct sctppcbhead *head;
 1517         struct sctp_inpcb *t_inp;
 1518         int fnd;
 1519 
 1520         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
 1521             SCTP_BASE_INFO(hashmark))];
 1522         LIST_FOREACH(t_inp, head, sctp_hash) {
 1523                 if (t_inp->sctp_lport != lport) {
 1524                         continue;
 1525                 }
 1526                 /* is it in the VRF in question */
 1527                 fnd = 0;
 1528                 if (t_inp->def_vrf_id == vrf_id)
 1529                         fnd = 1;
 1530                 if (!fnd)
 1531                         continue;
 1532 
 1533                 /* This one is in use. */
 1534                 /* check the v6/v4 binding issue */
 1535                 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
 1536                     SCTP_IPV6_V6ONLY(t_inp)) {
 1537                         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
 1538                                 /* collision in V6 space */
 1539                                 return (t_inp);
 1540                         } else {
 1541                                 /* inp is BOUND_V4 no conflict */
 1542                                 continue;
 1543                         }
 1544                 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
 1545                         /* t_inp is bound v4 and v6, conflict always */
 1546                         return (t_inp);
 1547                 } else {
 1548                         /* t_inp is bound only V4 */
 1549                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
 1550                             SCTP_IPV6_V6ONLY(inp)) {
 1551                                 /* no conflict */
 1552                                 continue;
 1553                         }
 1554                         /* else fall through to conflict */
 1555                 }
 1556                 return (t_inp);
 1557         }
 1558         return (NULL);
 1559 }
 1560 
 1561 
 1562 int
 1563 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp)
 1564 {
 1565         /* For 1-2-1 with port reuse */
 1566         struct sctppcbhead *head;
 1567         struct sctp_inpcb *tinp;
 1568 
 1569         if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) {
 1570                 /* only works with port reuse on */
 1571                 return (-1);
 1572         }
 1573         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) {
 1574                 return (0);
 1575         }
 1576         SCTP_INP_RUNLOCK(inp);
 1577         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport,
 1578             SCTP_BASE_INFO(hashmark))];
 1579         /* Kick out all non-listeners to the TCP hash */
 1580         LIST_FOREACH(tinp, head, sctp_hash) {
 1581                 if (tinp->sctp_lport != inp->sctp_lport) {
 1582                         continue;
 1583                 }
 1584                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
 1585                         continue;
 1586                 }
 1587                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
 1588                         continue;
 1589                 }
 1590                 if (tinp->sctp_socket->so_qlimit) {
 1591                         continue;
 1592                 }
 1593                 SCTP_INP_WLOCK(tinp);
 1594                 LIST_REMOVE(tinp, sctp_hash);
 1595                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))];
 1596                 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
 1597                 LIST_INSERT_HEAD(head, tinp, sctp_hash);
 1598                 SCTP_INP_WUNLOCK(tinp);
 1599         }
 1600         SCTP_INP_WLOCK(inp);
 1601         /* Pull from where he was */
 1602         LIST_REMOVE(inp, sctp_hash);
 1603         inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL;
 1604         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))];
 1605         LIST_INSERT_HEAD(head, inp, sctp_hash);
 1606         SCTP_INP_WUNLOCK(inp);
 1607         SCTP_INP_RLOCK(inp);
 1608         return (0);
 1609 }
 1610 
 1611 
 1612 struct sctp_inpcb *
 1613 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock,
 1614     uint32_t vrf_id)
 1615 {
 1616         /*
 1617          * First we check the hash table to see if someone has this port
 1618          * bound with just the port.
 1619          */
 1620         struct sctp_inpcb *inp;
 1621         struct sctppcbhead *head;
 1622         struct sockaddr_in *sin;
 1623         struct sockaddr_in6 *sin6;
 1624         int lport;
 1625 
 1626         if (nam->sa_family == AF_INET) {
 1627                 sin = (struct sockaddr_in *)nam;
 1628                 lport = ((struct sockaddr_in *)nam)->sin_port;
 1629         } else if (nam->sa_family == AF_INET6) {
 1630                 sin6 = (struct sockaddr_in6 *)nam;
 1631                 lport = ((struct sockaddr_in6 *)nam)->sin6_port;
 1632         } else {
 1633                 /* unsupported family */
 1634                 return (NULL);
 1635         }
 1636         /*
 1637          * I could cheat here and just cast to one of the types but we will
 1638          * do it right. It also provides the check against an Unsupported
 1639          * type too.
 1640          */
 1641         /* Find the head of the ALLADDR chain */
 1642         if (have_lock == 0) {
 1643                 SCTP_INP_INFO_RLOCK();
 1644         }
 1645         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
 1646             SCTP_BASE_INFO(hashmark))];
 1647         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
 1648 
 1649         /*
 1650          * If the TCP model exists it could be that the main listening
 1651          * endpoint is gone but there exists a connected socket for this guy
 1652          * yet. If so we can return the first one that we find. This may NOT
 1653          * be the correct one so the caller should be wary on the return
 1654          * INP. Currently the onlyc caller that sets this flag is in bindx
 1655          * where we are verifying that a user CAN bind the address. He
 1656          * either has bound it already, or someone else has, or its open to
 1657          * bind, so this is good enough.
 1658          */
 1659         if (inp == NULL && find_tcp_pool) {
 1660                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))];
 1661                 inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
 1662         }
 1663         if (inp) {
 1664                 SCTP_INP_INCR_REF(inp);
 1665         }
 1666         if (have_lock == 0) {
 1667                 SCTP_INP_INFO_RUNLOCK();
 1668         }
 1669         return (inp);
 1670 }
 1671 
 1672 /*
 1673  * Find an association for an endpoint with the pointer to whom you want to
 1674  * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may
 1675  * need to change the *to to some other struct like a mbuf...
 1676  */
 1677 struct sctp_tcb *
 1678 sctp_findassociation_addr_sa(struct sockaddr *to, struct sockaddr *from,
 1679     struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool,
 1680     uint32_t vrf_id)
 1681 {
 1682         struct sctp_inpcb *inp = NULL;
 1683         struct sctp_tcb *retval;
 1684 
 1685         SCTP_INP_INFO_RLOCK();
 1686         if (find_tcp_pool) {
 1687                 if (inp_p != NULL) {
 1688                         retval = sctp_tcb_special_locate(inp_p, from, to, netp,
 1689                             vrf_id);
 1690                 } else {
 1691                         retval = sctp_tcb_special_locate(&inp, from, to, netp,
 1692                             vrf_id);
 1693                 }
 1694                 if (retval != NULL) {
 1695                         SCTP_INP_INFO_RUNLOCK();
 1696                         return (retval);
 1697                 }
 1698         }
 1699         inp = sctp_pcb_findep(to, 0, 1, vrf_id);
 1700         if (inp_p != NULL) {
 1701                 *inp_p = inp;
 1702         }
 1703         SCTP_INP_INFO_RUNLOCK();
 1704 
 1705         if (inp == NULL) {
 1706                 return (NULL);
 1707         }
 1708         /*
 1709          * ok, we have an endpoint, now lets find the assoc for it (if any)
 1710          * we now place the source address or from in the to of the find
 1711          * endpoint call. Since in reality this chain is used from the
 1712          * inbound packet side.
 1713          */
 1714         if (inp_p != NULL) {
 1715                 retval = sctp_findassociation_ep_addr(inp_p, from, netp, to,
 1716                     NULL);
 1717         } else {
 1718                 retval = sctp_findassociation_ep_addr(&inp, from, netp, to,
 1719                     NULL);
 1720         }
 1721         return retval;
 1722 }
 1723 
 1724 
 1725 /*
 1726  * This routine will grub through the mbuf that is a INIT or INIT-ACK and
 1727  * find all addresses that the sender has specified in any address list. Each
 1728  * address will be used to lookup the TCB and see if one exits.
 1729  */
 1730 static struct sctp_tcb *
 1731 sctp_findassociation_special_addr(struct mbuf *m, int iphlen, int offset,
 1732     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp,
 1733     struct sockaddr *dest)
 1734 {
 1735         struct sockaddr_in sin4;
 1736         struct sockaddr_in6 sin6;
 1737         struct sctp_paramhdr *phdr, parm_buf;
 1738         struct sctp_tcb *retval;
 1739         uint32_t ptype, plen;
 1740 
 1741         memset(&sin4, 0, sizeof(sin4));
 1742         memset(&sin6, 0, sizeof(sin6));
 1743         sin4.sin_len = sizeof(sin4);
 1744         sin4.sin_family = AF_INET;
 1745         sin4.sin_port = sh->src_port;
 1746         sin6.sin6_len = sizeof(sin6);
 1747         sin6.sin6_family = AF_INET6;
 1748         sin6.sin6_port = sh->src_port;
 1749 
 1750         retval = NULL;
 1751         offset += sizeof(struct sctp_init_chunk);
 1752 
 1753         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
 1754         while (phdr != NULL) {
 1755                 /* now we must see if we want the parameter */
 1756                 ptype = ntohs(phdr->param_type);
 1757                 plen = ntohs(phdr->param_length);
 1758                 if (plen == 0) {
 1759                         break;
 1760                 }
 1761                 if (ptype == SCTP_IPV4_ADDRESS &&
 1762                     plen == sizeof(struct sctp_ipv4addr_param)) {
 1763                         /* Get the rest of the address */
 1764                         struct sctp_ipv4addr_param ip4_parm, *p4;
 1765 
 1766                         phdr = sctp_get_next_param(m, offset,
 1767                             (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm)));
 1768                         if (phdr == NULL) {
 1769                                 return (NULL);
 1770                         }
 1771                         p4 = (struct sctp_ipv4addr_param *)phdr;
 1772                         memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr));
 1773                         /* look it up */
 1774                         retval = sctp_findassociation_ep_addr(inp_p,
 1775                             (struct sockaddr *)&sin4, netp, dest, NULL);
 1776                         if (retval != NULL) {
 1777                                 return (retval);
 1778                         }
 1779                 } else if (ptype == SCTP_IPV6_ADDRESS &&
 1780                     plen == sizeof(struct sctp_ipv6addr_param)) {
 1781                         /* Get the rest of the address */
 1782                         struct sctp_ipv6addr_param ip6_parm, *p6;
 1783 
 1784                         phdr = sctp_get_next_param(m, offset,
 1785                             (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm)));
 1786                         if (phdr == NULL) {
 1787                                 return (NULL);
 1788                         }
 1789                         p6 = (struct sctp_ipv6addr_param *)phdr;
 1790                         memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr));
 1791                         /* look it up */
 1792                         retval = sctp_findassociation_ep_addr(inp_p,
 1793                             (struct sockaddr *)&sin6, netp, dest, NULL);
 1794                         if (retval != NULL) {
 1795                                 return (retval);
 1796                         }
 1797                 }
 1798                 offset += SCTP_SIZE32(plen);
 1799                 phdr = sctp_get_next_param(m, offset, &parm_buf,
 1800                     sizeof(parm_buf));
 1801         }
 1802         return (NULL);
 1803 }
 1804 
 1805 static int
 1806 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to)
 1807 {
 1808         struct sctp_nets *net;
 1809 
 1810         /*
 1811          * Simple question, the ports match, does the tcb own the to
 1812          * address?
 1813          */
 1814         if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) {
 1815                 /* of course */
 1816                 return (1);
 1817         }
 1818         /* have to look at all bound addresses */
 1819         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 1820                 if (net->ro._l_addr.sa.sa_family != to->sa_family) {
 1821                         /* not the same family, can't be a match */
 1822                         continue;
 1823                 }
 1824                 switch (to->sa_family) {
 1825                 case AF_INET:
 1826                         {
 1827                                 struct sockaddr_in *sin, *rsin;
 1828 
 1829                                 sin = (struct sockaddr_in *)&net->ro._l_addr;
 1830                                 rsin = (struct sockaddr_in *)to;
 1831                                 if (sin->sin_addr.s_addr ==
 1832                                     rsin->sin_addr.s_addr) {
 1833                                         /* found it */
 1834                                         return (1);
 1835                                 }
 1836                                 break;
 1837                         }
 1838 #ifdef INET6
 1839                 case AF_INET6:
 1840                         {
 1841                                 struct sockaddr_in6 *sin6, *rsin6;
 1842 
 1843                                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
 1844                                 rsin6 = (struct sockaddr_in6 *)to;
 1845                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
 1846                                     rsin6)) {
 1847                                         /* Update the endpoint pointer */
 1848                                         return (1);
 1849                                 }
 1850                                 break;
 1851                         }
 1852 #endif
 1853                 default:
 1854                         /* TSNH */
 1855                         break;
 1856                 }
 1857         }
 1858         /* Nope, do not have the address ;-( */
 1859         return (0);
 1860 }
 1861 
 1862 static struct sctp_tcb *
 1863 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag,
 1864     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport,
 1865     uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag)
 1866 {
 1867         /*
 1868          * Use my vtag to hash. If we find it we then verify the source addr
 1869          * is in the assoc. If all goes well we save a bit on rec of a
 1870          * packet.
 1871          */
 1872         struct sctpasochead *head;
 1873         struct sctp_nets *net;
 1874         struct sctp_tcb *stcb;
 1875 
 1876         *netp = NULL;
 1877         *inp_p = NULL;
 1878         SCTP_INP_INFO_RLOCK();
 1879         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag,
 1880             SCTP_BASE_INFO(hashasocmark))];
 1881         if (head == NULL) {
 1882                 /* invalid vtag */
 1883                 SCTP_INP_INFO_RUNLOCK();
 1884                 return (NULL);
 1885         }
 1886         LIST_FOREACH(stcb, head, sctp_asocs) {
 1887                 SCTP_INP_RLOCK(stcb->sctp_ep);
 1888                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
 1889                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
 1890                         continue;
 1891                 }
 1892                 SCTP_TCB_LOCK(stcb);
 1893                 SCTP_INP_RUNLOCK(stcb->sctp_ep);
 1894                 if (stcb->asoc.my_vtag == vtag) {
 1895                         /* candidate */
 1896                         if (stcb->rport != rport) {
 1897                                 SCTP_TCB_UNLOCK(stcb);
 1898                                 continue;
 1899                         }
 1900                         if (stcb->sctp_ep->sctp_lport != lport) {
 1901                                 SCTP_TCB_UNLOCK(stcb);
 1902                                 continue;
 1903                         }
 1904                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
 1905                                 SCTP_TCB_UNLOCK(stcb);
 1906                                 continue;
 1907                         }
 1908                         /* RRS:Need toaddr check here */
 1909                         if (sctp_does_stcb_own_this_addr(stcb, to) == 0) {
 1910                                 /* Endpoint does not own this address */
 1911                                 SCTP_TCB_UNLOCK(stcb);
 1912                                 continue;
 1913                         }
 1914                         if (remote_tag) {
 1915                                 /*
 1916                                  * If we have both vtags thats all we match
 1917                                  * on
 1918                                  */
 1919                                 if (stcb->asoc.peer_vtag == remote_tag) {
 1920                                         /*
 1921                                          * If both tags match we consider it
 1922                                          * conclusive and check NO
 1923                                          * source/destination addresses
 1924                                          */
 1925                                         goto conclusive;
 1926                                 }
 1927                         }
 1928                         if (skip_src_check) {
 1929                 conclusive:
 1930                                 if (from) {
 1931                                         net = sctp_findnet(stcb, from);
 1932                                 } else {
 1933                                         *netp = NULL;   /* unknown */
 1934                                 }
 1935                                 if (inp_p)
 1936                                         *inp_p = stcb->sctp_ep;
 1937                                 SCTP_INP_INFO_RUNLOCK();
 1938                                 return (stcb);
 1939                         }
 1940                         net = sctp_findnet(stcb, from);
 1941                         if (net) {
 1942                                 /* yep its him. */
 1943                                 *netp = net;
 1944                                 SCTP_STAT_INCR(sctps_vtagexpress);
 1945                                 *inp_p = stcb->sctp_ep;
 1946                                 SCTP_INP_INFO_RUNLOCK();
 1947                                 return (stcb);
 1948                         } else {
 1949                                 /*
 1950                                  * not him, this should only happen in rare
 1951                                  * cases so I peg it.
 1952                                  */
 1953                                 SCTP_STAT_INCR(sctps_vtagbogus);
 1954                         }
 1955                 }
 1956                 SCTP_TCB_UNLOCK(stcb);
 1957         }
 1958         SCTP_INP_INFO_RUNLOCK();
 1959         return (NULL);
 1960 }
 1961 
 1962 /*
 1963  * Find an association with the pointer to the inbound IP packet. This can be
 1964  * a IPv4 or IPv6 packet.
 1965  */
 1966 struct sctp_tcb *
 1967 sctp_findassociation_addr(struct mbuf *m, int iphlen, int offset,
 1968     struct sctphdr *sh, struct sctp_chunkhdr *ch,
 1969     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
 1970 {
 1971         int find_tcp_pool;
 1972         struct ip *iph;
 1973         struct sctp_tcb *retval;
 1974         struct sockaddr_storage to_store, from_store;
 1975         struct sockaddr *to = (struct sockaddr *)&to_store;
 1976         struct sockaddr *from = (struct sockaddr *)&from_store;
 1977         struct sctp_inpcb *inp;
 1978 
 1979         iph = mtod(m, struct ip *);
 1980         switch (iph->ip_v) {
 1981         case IPVERSION:
 1982                 {
 1983                         /* its IPv4 */
 1984                         struct sockaddr_in *from4;
 1985 
 1986                         from4 = (struct sockaddr_in *)&from_store;
 1987                         bzero(from4, sizeof(*from4));
 1988                         from4->sin_family = AF_INET;
 1989                         from4->sin_len = sizeof(struct sockaddr_in);
 1990                         from4->sin_addr.s_addr = iph->ip_src.s_addr;
 1991                         from4->sin_port = sh->src_port;
 1992                         break;
 1993                 }
 1994 #ifdef INET6
 1995         case IPV6_VERSION >> 4:
 1996                 {
 1997                         /* its IPv6 */
 1998                         struct ip6_hdr *ip6;
 1999                         struct sockaddr_in6 *from6;
 2000 
 2001                         ip6 = mtod(m, struct ip6_hdr *);
 2002                         from6 = (struct sockaddr_in6 *)&from_store;
 2003                         bzero(from6, sizeof(*from6));
 2004                         from6->sin6_family = AF_INET6;
 2005                         from6->sin6_len = sizeof(struct sockaddr_in6);
 2006                         from6->sin6_addr = ip6->ip6_src;
 2007                         from6->sin6_port = sh->src_port;
 2008                         /* Get the scopes in properly to the sin6 addr's */
 2009                         /* we probably don't need these operations */
 2010                         (void)sa6_recoverscope(from6);
 2011                         sa6_embedscope(from6, MODULE_GLOBAL(MOD_INET6, MODULE_GLOBAL(MOD_INET6, ip6_use_defzone)));
 2012                         break;
 2013                 }
 2014 #endif
 2015         default:
 2016                 /* Currently not supported. */
 2017                 return (NULL);
 2018         }
 2019 
 2020 
 2021         switch (iph->ip_v) {
 2022         case IPVERSION:
 2023                 {
 2024                         /* its IPv4 */
 2025                         struct sockaddr_in *to4;
 2026 
 2027                         to4 = (struct sockaddr_in *)&to_store;
 2028                         bzero(to4, sizeof(*to4));
 2029                         to4->sin_family = AF_INET;
 2030                         to4->sin_len = sizeof(struct sockaddr_in);
 2031                         to4->sin_addr.s_addr = iph->ip_dst.s_addr;
 2032                         to4->sin_port = sh->dest_port;
 2033                         break;
 2034                 }
 2035 #ifdef INET6
 2036         case IPV6_VERSION >> 4:
 2037                 {
 2038                         /* its IPv6 */
 2039                         struct ip6_hdr *ip6;
 2040                         struct sockaddr_in6 *to6;
 2041 
 2042                         ip6 = mtod(m, struct ip6_hdr *);
 2043                         to6 = (struct sockaddr_in6 *)&to_store;
 2044                         bzero(to6, sizeof(*to6));
 2045                         to6->sin6_family = AF_INET6;
 2046                         to6->sin6_len = sizeof(struct sockaddr_in6);
 2047                         to6->sin6_addr = ip6->ip6_dst;
 2048                         to6->sin6_port = sh->dest_port;
 2049                         /* Get the scopes in properly to the sin6 addr's */
 2050                         /* we probably don't need these operations */
 2051                         (void)sa6_recoverscope(to6);
 2052                         sa6_embedscope(to6, MODULE_GLOBAL(MOD_INET6, MODULE_GLOBAL(MOD_INET6, ip6_use_defzone)));
 2053                         break;
 2054                 }
 2055 #endif
 2056         default:
 2057                 /* TSNH */
 2058                 break;
 2059         }
 2060         if (sh->v_tag) {
 2061                 /* we only go down this path if vtag is non-zero */
 2062                 retval = sctp_findassoc_by_vtag(from, to, ntohl(sh->v_tag),
 2063                     inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0);
 2064                 if (retval) {
 2065                         return (retval);
 2066                 }
 2067         }
 2068         find_tcp_pool = 0;
 2069         if ((ch->chunk_type != SCTP_INITIATION) &&
 2070             (ch->chunk_type != SCTP_INITIATION_ACK) &&
 2071             (ch->chunk_type != SCTP_COOKIE_ACK) &&
 2072             (ch->chunk_type != SCTP_COOKIE_ECHO)) {
 2073                 /* Other chunk types go to the tcp pool. */
 2074                 find_tcp_pool = 1;
 2075         }
 2076         if (inp_p) {
 2077                 retval = sctp_findassociation_addr_sa(to, from, inp_p, netp,
 2078                     find_tcp_pool, vrf_id);
 2079                 inp = *inp_p;
 2080         } else {
 2081                 retval = sctp_findassociation_addr_sa(to, from, &inp, netp,
 2082                     find_tcp_pool, vrf_id);
 2083         }
 2084         SCTPDBG(SCTP_DEBUG_PCB1, "retval:%p inp:%p\n", retval, inp);
 2085         if (retval == NULL && inp) {
 2086                 /* Found a EP but not this address */
 2087                 if ((ch->chunk_type == SCTP_INITIATION) ||
 2088                     (ch->chunk_type == SCTP_INITIATION_ACK)) {
 2089                         /*-
 2090                          * special hook, we do NOT return linp or an
 2091                          * association that is linked to an existing
 2092                          * association that is under the TCP pool (i.e. no
 2093                          * listener exists). The endpoint finding routine
 2094                          * will always find a listner before examining the
 2095                          * TCP pool.
 2096                          */
 2097                         if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
 2098                                 if (inp_p) {
 2099                                         *inp_p = NULL;
 2100                                 }
 2101                                 return (NULL);
 2102                         }
 2103                         retval = sctp_findassociation_special_addr(m, iphlen,
 2104                             offset, sh, &inp, netp, to);
 2105                         if (inp_p != NULL) {
 2106                                 *inp_p = inp;
 2107                         }
 2108                 }
 2109         }
 2110         SCTPDBG(SCTP_DEBUG_PCB1, "retval is %p\n", retval);
 2111         return (retval);
 2112 }
 2113 
 2114 /*
 2115  * lookup an association by an ASCONF lookup address.
 2116  * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup
 2117  */
 2118 struct sctp_tcb *
 2119 sctp_findassociation_ep_asconf(struct mbuf *m, int iphlen, int offset,
 2120     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
 2121 {
 2122         struct sctp_tcb *stcb;
 2123         struct sockaddr_in *sin;
 2124 
 2125 #ifdef INET6
 2126         struct sockaddr_in6 *sin6;
 2127 
 2128 #endif
 2129         struct sockaddr_storage local_store, remote_store;
 2130         struct sockaddr *to;
 2131         struct ip *iph;
 2132 
 2133 #ifdef INET6
 2134         struct ip6_hdr *ip6;
 2135 
 2136 #endif
 2137         struct sctp_paramhdr parm_buf, *phdr;
 2138         int ptype;
 2139         int zero_address = 0;
 2140 
 2141 
 2142         memset(&local_store, 0, sizeof(local_store));
 2143         memset(&remote_store, 0, sizeof(remote_store));
 2144         to = (struct sockaddr *)&local_store;
 2145         /* First get the destination address setup too. */
 2146         iph = mtod(m, struct ip *);
 2147         switch (iph->ip_v) {
 2148         case IPVERSION:
 2149                 /* its IPv4 */
 2150                 sin = (struct sockaddr_in *)&local_store;
 2151                 sin->sin_family = AF_INET;
 2152                 sin->sin_len = sizeof(*sin);
 2153                 sin->sin_port = sh->dest_port;
 2154                 sin->sin_addr.s_addr = iph->ip_dst.s_addr;
 2155                 break;
 2156 #ifdef INET6
 2157         case IPV6_VERSION >> 4:
 2158                 /* its IPv6 */
 2159                 ip6 = mtod(m, struct ip6_hdr *);
 2160                 sin6 = (struct sockaddr_in6 *)&local_store;
 2161                 sin6->sin6_family = AF_INET6;
 2162                 sin6->sin6_len = sizeof(*sin6);
 2163                 sin6->sin6_port = sh->dest_port;
 2164                 sin6->sin6_addr = ip6->ip6_dst;
 2165                 break;
 2166 #endif
 2167         default:
 2168                 return NULL;
 2169         }
 2170 
 2171         phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk),
 2172             &parm_buf, sizeof(struct sctp_paramhdr));
 2173         if (phdr == NULL) {
 2174                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n",
 2175                     __FUNCTION__);
 2176                 return NULL;
 2177         }
 2178         ptype = (int)((uint32_t) ntohs(phdr->param_type));
 2179         /* get the correlation address */
 2180         switch (ptype) {
 2181 #ifdef INET6
 2182         case SCTP_IPV6_ADDRESS:
 2183                 {
 2184                         /* ipv6 address param */
 2185                         struct sctp_ipv6addr_param *p6, p6_buf;
 2186 
 2187                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) {
 2188                                 return NULL;
 2189                         }
 2190                         p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m,
 2191                             offset + sizeof(struct sctp_asconf_chunk),
 2192                             &p6_buf.ph, sizeof(*p6));
 2193                         if (p6 == NULL) {
 2194                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n",
 2195                                     __FUNCTION__);
 2196                                 return (NULL);
 2197                         }
 2198                         sin6 = (struct sockaddr_in6 *)&remote_store;
 2199                         sin6->sin6_family = AF_INET6;
 2200                         sin6->sin6_len = sizeof(*sin6);
 2201                         sin6->sin6_port = sh->src_port;
 2202                         memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr));
 2203                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
 2204                                 zero_address = 1;
 2205                         break;
 2206                 }
 2207 #endif
 2208         case SCTP_IPV4_ADDRESS:
 2209                 {
 2210                         /* ipv4 address param */
 2211                         struct sctp_ipv4addr_param *p4, p4_buf;
 2212 
 2213                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) {
 2214                                 return NULL;
 2215                         }
 2216                         p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m,
 2217                             offset + sizeof(struct sctp_asconf_chunk),
 2218                             &p4_buf.ph, sizeof(*p4));
 2219                         if (p4 == NULL) {
 2220                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n",
 2221                                     __FUNCTION__);
 2222                                 return (NULL);
 2223                         }
 2224                         sin = (struct sockaddr_in *)&remote_store;
 2225                         sin->sin_family = AF_INET;
 2226                         sin->sin_len = sizeof(*sin);
 2227                         sin->sin_port = sh->src_port;
 2228                         memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr));
 2229                         if (sin->sin_addr.s_addr == INADDR_ANY)
 2230                                 zero_address = 1;
 2231                         break;
 2232                 }
 2233         default:
 2234                 /* invalid address param type */
 2235                 return NULL;
 2236         }
 2237 
 2238         if (zero_address) {
 2239                 stcb = sctp_findassoc_by_vtag(NULL, to, ntohl(sh->v_tag), inp_p,
 2240                     netp, sh->src_port, sh->dest_port, 1, vrf_id, 0);
 2241                 /*
 2242                  * printf("findassociation_ep_asconf: zero lookup address
 2243                  * finds stcb 0x%x\n", (uint32_t)stcb);
 2244                  */
 2245         } else {
 2246                 stcb = sctp_findassociation_ep_addr(inp_p,
 2247                     (struct sockaddr *)&remote_store, netp,
 2248                     to, NULL);
 2249         }
 2250         return (stcb);
 2251 }
 2252 
 2253 
 2254 /*
 2255  * allocate a sctp_inpcb and setup a temporary binding to a port/all
 2256  * addresses. This way if we don't get a bind we by default pick a ephemeral
 2257  * port with all addresses bound.
 2258  */
 2259 int
 2260 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id)
 2261 {
 2262         /*
 2263          * we get called when a new endpoint starts up. We need to allocate
 2264          * the sctp_inpcb structure from the zone and init it. Mark it as
 2265          * unbound and find a port that we can use as an ephemeral with
 2266          * INADDR_ANY. If the user binds later no problem we can then add in
 2267          * the specific addresses. And setup the default parameters for the
 2268          * EP.
 2269          */
 2270         int i, error;
 2271         struct sctp_inpcb *inp;
 2272         struct sctp_pcb *m;
 2273         struct timeval time;
 2274         sctp_sharedkey_t *null_key;
 2275 
 2276         error = 0;
 2277 
 2278         SCTP_INP_INFO_WLOCK();
 2279         inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb);
 2280         if (inp == NULL) {
 2281                 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n");
 2282                 SCTP_INP_INFO_WUNLOCK();
 2283                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
 2284                 return (ENOBUFS);
 2285         }
 2286         /* zap it */
 2287         bzero(inp, sizeof(*inp));
 2288 
 2289         /* bump generations */
 2290         /* setup socket pointers */
 2291         inp->sctp_socket = so;
 2292         inp->ip_inp.inp.inp_socket = so;
 2293         inp->sctp_associd_counter = 1;
 2294         inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT;
 2295         inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT;
 2296         /* init the small hash table we use to track asocid <-> tcb */
 2297         inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark);
 2298         if (inp->sctp_asocidhash == NULL) {
 2299                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
 2300                 SCTP_INP_INFO_WUNLOCK();
 2301                 return error;
 2302         }
 2303 #ifdef IPSEC
 2304         {
 2305                 struct inpcbpolicy *pcb_sp = NULL;
 2306 
 2307                 error = ipsec_init_policy(so, &pcb_sp);
 2308                 /* Arrange to share the policy */
 2309                 inp->ip_inp.inp.inp_sp = pcb_sp;
 2310                 ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp;
 2311         }
 2312         if (error != 0) {
 2313                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
 2314                 SCTP_INP_INFO_WUNLOCK();
 2315                 return error;
 2316         }
 2317 #endif                          /* IPSEC */
 2318         SCTP_INCR_EP_COUNT();
 2319         inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(MOD_INET, ip_defttl);
 2320         SCTP_INP_INFO_WUNLOCK();
 2321 
 2322         so->so_pcb = (caddr_t)inp;
 2323 
 2324         if ((SCTP_SO_TYPE(so) == SOCK_DGRAM) ||
 2325             (SCTP_SO_TYPE(so) == SOCK_SEQPACKET)) {
 2326                 /* UDP style socket */
 2327                 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
 2328                     SCTP_PCB_FLAGS_UNBOUND);
 2329                 /* Be sure it is NON-BLOCKING IO for UDP */
 2330                 /* SCTP_SET_SO_NBIO(so); */
 2331         } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) {
 2332                 /* TCP style socket */
 2333                 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
 2334                     SCTP_PCB_FLAGS_UNBOUND);
 2335                 /* Be sure we have blocking IO by default */
 2336                 SCTP_CLEAR_SO_NBIO(so);
 2337         } else {
 2338                 /*
 2339                  * unsupported socket type (RAW, etc)- in case we missed it
 2340                  * in protosw
 2341                  */
 2342                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP);
 2343                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
 2344                 return (EOPNOTSUPP);
 2345         }
 2346         if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) {
 2347                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
 2348                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
 2349         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) {
 2350                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
 2351                 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
 2352         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) {
 2353                 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
 2354                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
 2355         }
 2356         inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize),
 2357             &inp->sctp_hashmark);
 2358         if (inp->sctp_tcbhash == NULL) {
 2359                 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n");
 2360                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
 2361                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
 2362                 return (ENOBUFS);
 2363         }
 2364         inp->def_vrf_id = vrf_id;
 2365 
 2366         SCTP_INP_INFO_WLOCK();
 2367         SCTP_INP_LOCK_INIT(inp);
 2368         INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp");
 2369         SCTP_INP_READ_INIT(inp);
 2370         SCTP_ASOC_CREATE_LOCK_INIT(inp);
 2371         /* lock the new ep */
 2372         SCTP_INP_WLOCK(inp);
 2373 
 2374         /* add it to the info area */
 2375         LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list);
 2376         SCTP_INP_INFO_WUNLOCK();
 2377 
 2378         TAILQ_INIT(&inp->read_queue);
 2379         LIST_INIT(&inp->sctp_addr_list);
 2380 
 2381         LIST_INIT(&inp->sctp_asoc_list);
 2382 
 2383 #ifdef SCTP_TRACK_FREED_ASOCS
 2384         /* TEMP CODE */
 2385         LIST_INIT(&inp->sctp_asoc_free_list);
 2386 #endif
 2387         /* Init the timer structure for signature change */
 2388         SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer);
 2389         inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE;
 2390 
 2391         /* now init the actual endpoint default data */
 2392         m = &inp->sctp_ep;
 2393 
 2394         /* setup the base timeout information */
 2395         m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC);    /* needed ? */
 2396         m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC);    /* needed ? */
 2397         m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default));
 2398         m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default));
 2399         m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default));
 2400         m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default));
 2401         m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default));
 2402         /* all max/min max are in ms */
 2403         m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default);
 2404         m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default);
 2405         m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default);
 2406         m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default);
 2407         m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default);
 2408 
 2409         m->max_open_streams_intome = MAX_SCTP_STREAMS;
 2410 
 2411         m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default);
 2412         m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default);
 2413         m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default);
 2414         m->sctp_sws_sender = SCTP_SWS_SENDER_DEF;
 2415         m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF;
 2416         m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default);
 2417         if ((SCTP_BASE_SYSCTL(sctp_default_cc_module) >= SCTP_CC_RFC2581) &&
 2418             (SCTP_BASE_SYSCTL(sctp_default_cc_module) <= SCTP_CC_HTCP)) {
 2419                 m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module);
 2420         } else {
 2421                 /* sysctl done with invalid value, set to 2581 */
 2422                 m->sctp_default_cc_module = SCTP_CC_RFC2581;
 2423         }
 2424         /* number of streams to pre-open on a association */
 2425         m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default);
 2426 
 2427         /* Add adaptation cookie */
 2428         m->adaptation_layer_indicator = 0x504C5253;
 2429 
 2430         /* seed random number generator */
 2431         m->random_counter = 1;
 2432         m->store_at = SCTP_SIGNATURE_SIZE;
 2433         SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers));
 2434         sctp_fill_random_store(m);
 2435 
 2436         /* Minimum cookie size */
 2437         m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) +
 2438             sizeof(struct sctp_state_cookie);
 2439         m->size_of_a_cookie += SCTP_SIGNATURE_SIZE;
 2440 
 2441         /* Setup the initial secret */
 2442         (void)SCTP_GETTIME_TIMEVAL(&time);
 2443         m->time_of_secret_change = time.tv_sec;
 2444 
 2445         for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
 2446                 m->secret_key[0][i] = sctp_select_initial_TSN(m);
 2447         }
 2448         sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
 2449 
 2450         /* How long is a cookie good for ? */
 2451         m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default));
 2452         /*
 2453          * Initialize authentication parameters
 2454          */
 2455         m->local_hmacs = sctp_default_supported_hmaclist();
 2456         m->local_auth_chunks = sctp_alloc_chunklist();
 2457         sctp_auth_set_default_chunks(m->local_auth_chunks);
 2458         LIST_INIT(&m->shared_keys);
 2459         /* add default NULL key as key id 0 */
 2460         null_key = sctp_alloc_sharedkey();
 2461         sctp_insert_sharedkey(&m->shared_keys, null_key);
 2462         SCTP_INP_WUNLOCK(inp);
 2463 #ifdef SCTP_LOG_CLOSING
 2464         sctp_log_closing(inp, NULL, 12);
 2465 #endif
 2466         return (error);
 2467 }
 2468 
 2469 
 2470 void
 2471 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp,
 2472     struct sctp_tcb *stcb)
 2473 {
 2474         struct sctp_nets *net;
 2475         uint16_t lport, rport;
 2476         struct sctppcbhead *head;
 2477         struct sctp_laddr *laddr, *oladdr;
 2478 
 2479         atomic_add_int(&stcb->asoc.refcnt, 1);
 2480         SCTP_TCB_UNLOCK(stcb);
 2481         SCTP_INP_INFO_WLOCK();
 2482         SCTP_INP_WLOCK(old_inp);
 2483         SCTP_INP_WLOCK(new_inp);
 2484         SCTP_TCB_LOCK(stcb);
 2485         atomic_subtract_int(&stcb->asoc.refcnt, 1);
 2486 
 2487         new_inp->sctp_ep.time_of_secret_change =
 2488             old_inp->sctp_ep.time_of_secret_change;
 2489         memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key,
 2490             sizeof(old_inp->sctp_ep.secret_key));
 2491         new_inp->sctp_ep.current_secret_number =
 2492             old_inp->sctp_ep.current_secret_number;
 2493         new_inp->sctp_ep.last_secret_number =
 2494             old_inp->sctp_ep.last_secret_number;
 2495         new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie;
 2496 
 2497         /* make it so new data pours into the new socket */
 2498         stcb->sctp_socket = new_inp->sctp_socket;
 2499         stcb->sctp_ep = new_inp;
 2500 
 2501         /* Copy the port across */
 2502         lport = new_inp->sctp_lport = old_inp->sctp_lport;
 2503         rport = stcb->rport;
 2504         /* Pull the tcb from the old association */
 2505         LIST_REMOVE(stcb, sctp_tcbhash);
 2506         LIST_REMOVE(stcb, sctp_tcblist);
 2507         if (stcb->asoc.in_asocid_hash) {
 2508                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
 2509         }
 2510         /* Now insert the new_inp into the TCP connected hash */
 2511         head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport),
 2512             SCTP_BASE_INFO(hashtcpmark))];
 2513 
 2514         LIST_INSERT_HEAD(head, new_inp, sctp_hash);
 2515         /* Its safe to access */
 2516         new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
 2517 
 2518         /* Now move the tcb into the endpoint list */
 2519         LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist);
 2520         /*
 2521          * Question, do we even need to worry about the ep-hash since we
 2522          * only have one connection? Probably not :> so lets get rid of it
 2523          * and not suck up any kernel memory in that.
 2524          */
 2525         if (stcb->asoc.in_asocid_hash) {
 2526             struct sctpasochead *lhd;
 2527             lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id,
 2528                      new_inp->hashasocidmark)];
 2529             LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash);
 2530         }
 2531         /* Ok. Let's restart timer. */
 2532         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 2533                 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp,
 2534                     stcb, net);
 2535         }
 2536 
 2537         SCTP_INP_INFO_WUNLOCK();
 2538         if (new_inp->sctp_tcbhash != NULL) {
 2539                 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark);
 2540                 new_inp->sctp_tcbhash = NULL;
 2541         }
 2542         if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
 2543                 /* Subset bound, so copy in the laddr list from the old_inp */
 2544                 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) {
 2545                         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
 2546                         if (laddr == NULL) {
 2547                                 /*
 2548                                  * Gak, what can we do? This assoc is really
 2549                                  * HOSED. We probably should send an abort
 2550                                  * here.
 2551                                  */
 2552                                 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n");
 2553                                 continue;
 2554                         }
 2555                         SCTP_INCR_LADDR_COUNT();
 2556                         bzero(laddr, sizeof(*laddr));
 2557                         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
 2558                         laddr->ifa = oladdr->ifa;
 2559                         atomic_add_int(&laddr->ifa->refcount, 1);
 2560                         LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr,
 2561                             sctp_nxt_addr);
 2562                         new_inp->laddr_count++;
 2563                 }
 2564         }
 2565         /*
 2566          * Now any running timers need to be adjusted since we really don't
 2567          * care if they are running or not just blast in the new_inp into
 2568          * all of them.
 2569          */
 2570 
 2571         stcb->asoc.hb_timer.ep = (void *)new_inp;
 2572         stcb->asoc.dack_timer.ep = (void *)new_inp;
 2573         stcb->asoc.asconf_timer.ep = (void *)new_inp;
 2574         stcb->asoc.strreset_timer.ep = (void *)new_inp;
 2575         stcb->asoc.shut_guard_timer.ep = (void *)new_inp;
 2576         stcb->asoc.autoclose_timer.ep = (void *)new_inp;
 2577         stcb->asoc.delayed_event_timer.ep = (void *)new_inp;
 2578         stcb->asoc.delete_prim_timer.ep = (void *)new_inp;
 2579         /* now what about the nets? */
 2580         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 2581                 net->pmtu_timer.ep = (void *)new_inp;
 2582                 net->rxt_timer.ep = (void *)new_inp;
 2583                 net->fr_timer.ep = (void *)new_inp;
 2584         }
 2585         SCTP_INP_WUNLOCK(new_inp);
 2586         SCTP_INP_WUNLOCK(old_inp);
 2587 }
 2588 
 2589 
 2590 
 2591 
 2592 /* sctp_ifap is used to bypass normal local address validation checks */
 2593 int
 2594 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr,
 2595     struct sctp_ifa *sctp_ifap, struct thread *p)
 2596 {
 2597         /* bind a ep to a socket address */
 2598         struct sctppcbhead *head;
 2599         struct sctp_inpcb *inp, *inp_tmp;
 2600         struct inpcb *ip_inp;
 2601         int port_reuse_active = 0;
 2602         int bindall;
 2603         uint16_t lport;
 2604         int error;
 2605         uint32_t vrf_id;
 2606 
 2607         lport = 0;
 2608         error = 0;
 2609         bindall = 1;
 2610         inp = (struct sctp_inpcb *)so->so_pcb;
 2611         ip_inp = (struct inpcb *)so->so_pcb;
 2612 #ifdef SCTP_DEBUG
 2613         if (addr) {
 2614                 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port:%d\n",
 2615                     ntohs(((struct sockaddr_in *)addr)->sin_port));
 2616                 SCTPDBG(SCTP_DEBUG_PCB1, "Addr :");
 2617                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
 2618         }
 2619 #endif
 2620         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
 2621                 /* already did a bind, subsequent binds NOT allowed ! */
 2622                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
 2623                 return (EINVAL);
 2624         }
 2625 #ifdef INVARIANTS
 2626         if (p == NULL)
 2627                 panic("null proc/thread");
 2628 #endif
 2629         if (addr != NULL) {
 2630                 switch (addr->sa_family) {
 2631                 case AF_INET:
 2632                         {
 2633                                 struct sockaddr_in *sin;
 2634 
 2635                                 /* IPV6_V6ONLY socket? */
 2636                                 if (SCTP_IPV6_V6ONLY(ip_inp)) {
 2637                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
 2638                                         return (EINVAL);
 2639                                 }
 2640                                 if (addr->sa_len != sizeof(*sin)) {
 2641                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
 2642                                         return (EINVAL);
 2643                                 }
 2644                                 sin = (struct sockaddr_in *)addr;
 2645                                 lport = sin->sin_port;
 2646                                 /*
 2647                                  * For LOOPBACK the prison_local_ip4() call
 2648                                  * will transmute the ip address to the
 2649                                  * proper value.
 2650                                  */
 2651                                 if (p && prison_local_ip4(p->td_ucred, &sin->sin_addr) != 0) {
 2652                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
 2653                                         return (EINVAL);
 2654                                 }
 2655                                 if (sin->sin_addr.s_addr != INADDR_ANY) {
 2656                                         bindall = 0;
 2657                                 }
 2658                                 break;
 2659                         }
 2660 #ifdef INET6
 2661                 case AF_INET6:
 2662                         {
 2663                                 /*
 2664                                  * Only for pure IPv6 Address. (No IPv4
 2665                                  * Mapped!)
 2666                                  */
 2667                                 struct sockaddr_in6 *sin6;
 2668 
 2669                                 sin6 = (struct sockaddr_in6 *)addr;
 2670 
 2671                                 if (addr->sa_len != sizeof(*sin6)) {
 2672                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
 2673                                         return (EINVAL);
 2674                                 }
 2675                                 lport = sin6->sin6_port;
 2676 
 2677                                 /*
 2678                                  * For LOOPBACK the prison_local_ip6() call
 2679                                  * will transmute the ipv6 address to the
 2680                                  * proper value.
 2681                                  */
 2682                                 if (p && prison_local_ip6(p->td_ucred, &sin6->sin6_addr,
 2683                                     (SCTP_IPV6_V6ONLY(inp) != 0)) != 0) {
 2684                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
 2685                                         return (EINVAL);
 2686                                 }
 2687                                 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
 2688                                         bindall = 0;
 2689                                         /* KAME hack: embed scopeid */
 2690                                         if (sa6_embedscope(sin6, MODULE_GLOBAL(MOD_INET6, ip6_use_defzone)) != 0) {
 2691                                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
 2692                                                 return (EINVAL);
 2693                                         }
 2694                                 }
 2695                                 /* this must be cleared for ifa_ifwithaddr() */
 2696                                 sin6->sin6_scope_id = 0;
 2697                                 break;
 2698                         }
 2699 #endif
 2700                 default:
 2701                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT);
 2702                         return (EAFNOSUPPORT);
 2703                 }
 2704         }
 2705         SCTP_INP_INFO_WLOCK();
 2706         SCTP_INP_WLOCK(inp);
 2707         /* Setup a vrf_id to be the default for the non-bind-all case. */
 2708         vrf_id = inp->def_vrf_id;
 2709 
 2710         /* increase our count due to the unlock we do */
 2711         SCTP_INP_INCR_REF(inp);
 2712         if (lport) {
 2713                 /*
 2714                  * Did the caller specify a port? if so we must see if a ep
 2715                  * already has this one bound.
 2716                  */
 2717                 /* got to be root to get at low ports */
 2718                 if (ntohs(lport) < IPPORT_RESERVED) {
 2719                         if (p && (error =
 2720                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
 2721                             )) {
 2722                                 SCTP_INP_DECR_REF(inp);
 2723                                 SCTP_INP_WUNLOCK(inp);
 2724                                 SCTP_INP_INFO_WUNLOCK();
 2725                                 return (error);
 2726                         }
 2727                 }
 2728                 if (p == NULL) {
 2729                         SCTP_INP_DECR_REF(inp);
 2730                         SCTP_INP_WUNLOCK(inp);
 2731                         SCTP_INP_INFO_WUNLOCK();
 2732                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
 2733                         return (error);
 2734                 }
 2735                 SCTP_INP_WUNLOCK(inp);
 2736                 if (bindall) {
 2737                         vrf_id = inp->def_vrf_id;
 2738                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
 2739                         if (inp_tmp != NULL) {
 2740                                 /*
 2741                                  * lock guy returned and lower count note
 2742                                  * that we are not bound so inp_tmp should
 2743                                  * NEVER be inp. And it is this inp
 2744                                  * (inp_tmp) that gets the reference bump,
 2745                                  * so we must lower it.
 2746                                  */
 2747                                 SCTP_INP_DECR_REF(inp_tmp);
 2748                                 /* unlock info */
 2749                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
 2750                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
 2751                                         /*
 2752                                          * Ok, must be one-2-one and
 2753                                          * allowing port re-use
 2754                                          */
 2755                                         port_reuse_active = 1;
 2756                                         goto continue_anyway;
 2757                                 }
 2758                                 SCTP_INP_DECR_REF(inp);
 2759                                 SCTP_INP_INFO_WUNLOCK();
 2760                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
 2761                                 return (EADDRINUSE);
 2762                         }
 2763                 } else {
 2764                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
 2765                         if (inp_tmp != NULL) {
 2766                                 /*
 2767                                  * lock guy returned and lower count note
 2768                                  * that we are not bound so inp_tmp should
 2769                                  * NEVER be inp. And it is this inp
 2770                                  * (inp_tmp) that gets the reference bump,
 2771                                  * so we must lower it.
 2772                                  */
 2773                                 SCTP_INP_DECR_REF(inp_tmp);
 2774                                 /* unlock info */
 2775                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
 2776                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
 2777                                         /*
 2778                                          * Ok, must be one-2-one and
 2779                                          * allowing port re-use
 2780                                          */
 2781                                         port_reuse_active = 1;
 2782                                         goto continue_anyway;
 2783                                 }
 2784                                 SCTP_INP_DECR_REF(inp);
 2785                                 SCTP_INP_INFO_WUNLOCK();
 2786                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
 2787                                 return (EADDRINUSE);
 2788                         }
 2789                 }
 2790 continue_anyway:
 2791                 SCTP_INP_WLOCK(inp);
 2792                 if (bindall) {
 2793                         /* verify that no lport is not used by a singleton */
 2794                         if ((port_reuse_active == 0) &&
 2795                             (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))
 2796                             ) {
 2797                                 /* Sorry someone already has this one bound */
 2798                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
 2799                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
 2800                                         port_reuse_active = 1;
 2801                                 } else {
 2802                                         SCTP_INP_DECR_REF(inp);
 2803                                         SCTP_INP_WUNLOCK(inp);
 2804                                         SCTP_INP_INFO_WUNLOCK();
 2805                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
 2806                                         return (EADDRINUSE);
 2807                                 }
 2808                         }
 2809                 }
 2810         } else {
 2811                 uint16_t first, last, candidate;
 2812                 uint16_t count;
 2813                 int done;
 2814 
 2815                 if (ip_inp->inp_flags & INP_HIGHPORT) {
 2816                         first = MODULE_GLOBAL(MOD_INET, ipport_hifirstauto);
 2817                         last = MODULE_GLOBAL(MOD_INET, ipport_hilastauto);
 2818                 } else if (ip_inp->inp_flags & INP_LOWPORT) {
 2819                         if (p && (error =
 2820                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
 2821                             )) {
 2822                                 SCTP_INP_DECR_REF(inp);
 2823                                 SCTP_INP_WUNLOCK(inp);
 2824                                 SCTP_INP_INFO_WUNLOCK();
 2825                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
 2826                                 return (error);
 2827                         }
 2828                         first = MODULE_GLOBAL(MOD_INET, ipport_lowfirstauto);
 2829                         last = MODULE_GLOBAL(MOD_INET, ipport_lowlastauto);
 2830                 } else {
 2831                         first = MODULE_GLOBAL(MOD_INET, ipport_firstauto);
 2832                         last = MODULE_GLOBAL(MOD_INET, ipport_lastauto);
 2833                 }
 2834                 if (first > last) {
 2835                         uint16_t temp;
 2836 
 2837                         temp = first;
 2838                         first = last;
 2839                         last = temp;
 2840                 }
 2841                 count = last - first + 1;       /* number of candidates */
 2842                 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count);
 2843 
 2844                 done = 0;
 2845                 while (!done) {
 2846                         if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) {
 2847                                 done = 1;
 2848                         }
 2849                         if (!done) {
 2850                                 if (--count == 0) {
 2851                                         SCTP_INP_DECR_REF(inp);
 2852                                         SCTP_INP_WUNLOCK(inp);
 2853                                         SCTP_INP_INFO_WUNLOCK();
 2854                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
 2855                                         return (EADDRINUSE);
 2856                                 }
 2857                                 if (candidate == last)
 2858                                         candidate = first;
 2859                                 else
 2860                                         candidate = candidate + 1;
 2861                         }
 2862                 }
 2863                 lport = htons(candidate);
 2864         }
 2865         SCTP_INP_DECR_REF(inp);
 2866         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
 2867             SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
 2868                 /*
 2869                  * this really should not happen. The guy did a non-blocking
 2870                  * bind and then did a close at the same time.
 2871                  */
 2872                 SCTP_INP_WUNLOCK(inp);
 2873                 SCTP_INP_INFO_WUNLOCK();
 2874                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
 2875                 return (EINVAL);
 2876         }
 2877         /* ok we look clear to give out this port, so lets setup the binding */
 2878         if (bindall) {
 2879                 /* binding to all addresses, so just set in the proper flags */
 2880                 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL;
 2881                 /* set the automatic addr changes from kernel flag */
 2882                 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) {
 2883                         sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF);
 2884                         sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
 2885                 } else {
 2886                         sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
 2887                         sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
 2888                 }
 2889                 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) {
 2890                         sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
 2891                 } else {
 2892                         sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
 2893                 }
 2894                 /*
 2895                  * set the automatic mobility_base from kernel flag (by
 2896                  * micchie)
 2897                  */
 2898                 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) {
 2899                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE);
 2900                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
 2901                 } else {
 2902                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE);
 2903                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
 2904                 }
 2905                 /*
 2906                  * set the automatic mobility_fasthandoff from kernel flag
 2907                  * (by micchie)
 2908                  */
 2909                 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) {
 2910                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF);
 2911                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
 2912                 } else {
 2913                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF);
 2914                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
 2915                 }
 2916         } else {
 2917                 /*
 2918                  * bind specific, make sure flags is off and add a new
 2919                  * address structure to the sctp_addr_list inside the ep
 2920                  * structure.
 2921                  * 
 2922                  * We will need to allocate one and insert it at the head. The
 2923                  * socketopt call can just insert new addresses in there as
 2924                  * well. It will also have to do the embed scope kame hack
 2925                  * too (before adding).
 2926                  */
 2927                 struct sctp_ifa *ifa;
 2928                 struct sockaddr_storage store_sa;
 2929 
 2930                 memset(&store_sa, 0, sizeof(store_sa));
 2931                 if (addr->sa_family == AF_INET) {
 2932                         struct sockaddr_in *sin;
 2933 
 2934                         sin = (struct sockaddr_in *)&store_sa;
 2935                         memcpy(sin, addr, sizeof(struct sockaddr_in));
 2936                         sin->sin_port = 0;
 2937                 } else if (addr->sa_family == AF_INET6) {
 2938                         struct sockaddr_in6 *sin6;
 2939 
 2940                         sin6 = (struct sockaddr_in6 *)&store_sa;
 2941                         memcpy(sin6, addr, sizeof(struct sockaddr_in6));
 2942                         sin6->sin6_port = 0;
 2943                 }
 2944                 /*
 2945                  * first find the interface with the bound address need to
 2946                  * zero out the port to find the address! yuck! can't do
 2947                  * this earlier since need port for sctp_pcb_findep()
 2948                  */
 2949                 if (sctp_ifap != NULL)
 2950                         ifa = sctp_ifap;
 2951                 else {
 2952                         /*
 2953                          * Note for BSD we hit here always other O/S's will
 2954                          * pass things in via the sctp_ifap argument
 2955                          * (Panda).
 2956                          */
 2957                         ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa,
 2958                             vrf_id, SCTP_ADDR_NOT_LOCKED);
 2959                 }
 2960                 if (ifa == NULL) {
 2961                         /* Can't find an interface with that address */
 2962                         SCTP_INP_WUNLOCK(inp);
 2963                         SCTP_INP_INFO_WUNLOCK();
 2964                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL);
 2965                         return (EADDRNOTAVAIL);
 2966                 }
 2967                 if (addr->sa_family == AF_INET6) {
 2968                         /* GAK, more FIXME IFA lock? */
 2969                         if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
 2970                                 /* Can't bind a non-existent addr. */
 2971                                 SCTP_INP_WUNLOCK(inp);
 2972                                 SCTP_INP_INFO_WUNLOCK();
 2973                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
 2974                                 return (EINVAL);
 2975                         }
 2976                 }
 2977                 /* we're not bound all */
 2978                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
 2979                 /* allow bindx() to send ASCONF's for binding changes */
 2980                 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
 2981                 /* clear automatic addr changes from kernel flag */
 2982                 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
 2983 
 2984                 /* add this address to the endpoint list */
 2985                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0);
 2986                 if (error != 0) {
 2987                         SCTP_INP_WUNLOCK(inp);
 2988                         SCTP_INP_INFO_WUNLOCK();
 2989                         return (error);
 2990                 }
 2991                 inp->laddr_count++;
 2992         }
 2993         /* find the bucket */
 2994         if (port_reuse_active) {
 2995                 /* Put it into tcp 1-2-1 hash */
 2996                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport),
 2997                     SCTP_BASE_INFO(hashtcpmark))];
 2998                 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
 2999         } else {
 3000                 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
 3001                     SCTP_BASE_INFO(hashmark))];
 3002         }
 3003         /* put it in the bucket */
 3004         LIST_INSERT_HEAD(head, inp, sctp_hash);
 3005         SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n",
 3006             head, ntohs(lport), port_reuse_active);
 3007         /* set in the port */
 3008         inp->sctp_lport = lport;
 3009 
 3010         /* turn off just the unbound flag */
 3011         inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
 3012         SCTP_INP_WUNLOCK(inp);
 3013         SCTP_INP_INFO_WUNLOCK();
 3014         return (0);
 3015 }
 3016 
 3017 
 3018 static void
 3019 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp, struct sctp_inpcb *inp_next)
 3020 {
 3021         struct sctp_iterator *it;
 3022 
 3023         /*
 3024          * We enter with the only the ITERATOR_LOCK in place and a write
 3025          * lock on the inp_info stuff.
 3026          */
 3027 
 3028         /*
 3029          * Go through all iterators, we must do this since it is possible
 3030          * that some iterator does NOT have the lock, but is waiting for it.
 3031          * And the one that had the lock has either moved in the last
 3032          * iteration or we just cleared it above. We need to find all of
 3033          * those guys. The list of iterators should never be very big
 3034          * though.
 3035          */
 3036         TAILQ_FOREACH(it, &SCTP_BASE_INFO(iteratorhead), sctp_nxt_itr) {
 3037                 if (it == inp->inp_starting_point_for_iterator)
 3038                         /* skip this guy, he's special */
 3039                         continue;
 3040                 if (it->inp == inp) {
 3041                         /*
 3042                          * This is tricky and we DON'T lock the iterator.
 3043                          * Reason is he's running but waiting for me since
 3044                          * inp->inp_starting_point_for_iterator has the lock
 3045                          * on me (the guy above we skipped). This tells us
 3046                          * its is not running but waiting for
 3047                          * inp->inp_starting_point_for_iterator to be
 3048                          * released by the guy that does have our INP in a
 3049                          * lock.
 3050                          */
 3051                         if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
 3052                                 it->inp = NULL;
 3053                                 it->stcb = NULL;
 3054                         } else {
 3055                                 /* set him up to do the next guy not me */
 3056                                 it->inp = inp_next;
 3057                                 it->stcb = NULL;
 3058                         }
 3059                 }
 3060         }
 3061         it = inp->inp_starting_point_for_iterator;
 3062         if (it) {
 3063                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
 3064                         it->inp = NULL;
 3065                 } else {
 3066                         it->inp = inp_next;
 3067                 }
 3068                 it->stcb = NULL;
 3069         }
 3070 }
 3071 
 3072 /* release sctp_inpcb unbind the port */
 3073 void
 3074 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from)
 3075 {
 3076         /*
 3077          * Here we free a endpoint. We must find it (if it is in the Hash
 3078          * table) and remove it from there. Then we must also find it in the
 3079          * overall list and remove it from there. After all removals are
 3080          * complete then any timer has to be stopped. Then start the actual
 3081          * freeing. a) Any local lists. b) Any associations. c) The hash of
 3082          * all associations. d) finally the ep itself.
 3083          */
 3084         struct sctp_pcb *m;
 3085         struct sctp_inpcb *inp_save;
 3086         struct sctp_tcb *asoc, *nasoc;
 3087         struct sctp_laddr *laddr, *nladdr;
 3088         struct inpcb *ip_pcb;
 3089         struct socket *so;
 3090 
 3091         struct sctp_queued_to_read *sq;
 3092 
 3093 
 3094         int cnt;
 3095         sctp_sharedkey_t *shared_key;
 3096 
 3097 
 3098 #ifdef SCTP_LOG_CLOSING
 3099         sctp_log_closing(inp, NULL, 0);
 3100 #endif
 3101         SCTP_ITERATOR_LOCK();
 3102         so = inp->sctp_socket;
 3103         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
 3104                 /* been here before.. eeks.. get out of here */
 3105                 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate);
 3106                 SCTP_ITERATOR_UNLOCK();
 3107 #ifdef SCTP_LOG_CLOSING
 3108                 sctp_log_closing(inp, NULL, 1);
 3109 #endif
 3110                 return;
 3111         }
 3112         SCTP_ASOC_CREATE_LOCK(inp);
 3113         SCTP_INP_INFO_WLOCK();
 3114 
 3115         SCTP_INP_WLOCK(inp);
 3116         /* First time through we have the socket lock, after that no more. */
 3117         if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) {
 3118                 /*
 3119                  * Once we are in we can remove the flag from = 1 is only
 3120                  * passed from the actual closing routines that are called
 3121                  * via the sockets layer.
 3122                  */
 3123                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP;
 3124                 /* socket is gone, so no more wakeups allowed */
 3125                 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE;
 3126                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT;
 3127                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT;
 3128         }
 3129         sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL,
 3130             SCTP_FROM_SCTP_PCB + SCTP_LOC_1);
 3131 
 3132         if (inp->control) {
 3133                 sctp_m_freem(inp->control);
 3134                 inp->control = NULL;
 3135         }
 3136         if (inp->pkt) {
 3137                 sctp_m_freem(inp->pkt);
 3138                 inp->pkt = NULL;
 3139         }
 3140         m = &inp->sctp_ep;
 3141         ip_pcb = &inp->ip_inp.inp;      /* we could just cast the main pointer
 3142                                          * here but I will be nice :> (i.e.
 3143                                          * ip_pcb = ep;) */
 3144         if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
 3145                 int cnt_in_sd;
 3146 
 3147                 cnt_in_sd = 0;
 3148                 for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL;
 3149                     asoc = nasoc) {
 3150                         SCTP_TCB_LOCK(asoc);
 3151                         nasoc = LIST_NEXT(asoc, sctp_tcblist);
 3152                         if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
 3153                                 /* Skip guys being freed */
 3154                                 /* asoc->sctp_socket = NULL; FIXME MT */
 3155                                 cnt_in_sd++;
 3156                                 SCTP_TCB_UNLOCK(asoc);
 3157                                 continue;
 3158                         }
 3159                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) ||
 3160                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) {
 3161                                 /*
 3162                                  * If we have data in queue, we don't want
 3163                                  * to just free since the app may have done,
 3164                                  * send()/close or connect/send/close. And
 3165                                  * it wants the data to get across first.
 3166                                  */
 3167                                 /* Just abandon things in the front states */
 3168                                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE,
 3169                                     SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) {
 3170                                         cnt_in_sd++;
 3171                                 }
 3172                                 continue;
 3173                         }
 3174                         /* Disconnect the socket please */
 3175                         asoc->sctp_socket = NULL;
 3176                         asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET;
 3177                         if ((asoc->asoc.size_on_reasm_queue > 0) ||
 3178                             (asoc->asoc.control_pdapi) ||
 3179                             (asoc->asoc.size_on_all_streams > 0) ||
 3180                             (so && (so->so_rcv.sb_cc > 0))
 3181                             ) {
 3182                                 /* Left with Data unread */
 3183                                 struct mbuf *op_err;
 3184 
 3185                                 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
 3186                                     0, M_DONTWAIT, 1, MT_DATA);
 3187                                 if (op_err) {
 3188                                         /* Fill in the user initiated abort */
 3189                                         struct sctp_paramhdr *ph;
 3190                                         uint32_t *ippp;
 3191 
 3192                                         SCTP_BUF_LEN(op_err) =
 3193                                             sizeof(struct sctp_paramhdr) + sizeof(uint32_t);
 3194                                         ph = mtod(op_err,
 3195                                             struct sctp_paramhdr *);
 3196                                         ph->param_type = htons(
 3197                                             SCTP_CAUSE_USER_INITIATED_ABT);
 3198                                         ph->param_length = htons(SCTP_BUF_LEN(op_err));
 3199                                         ippp = (uint32_t *) (ph + 1);
 3200                                         *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_3);
 3201                                 }
 3202                                 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3;
 3203 #if defined(SCTP_PANIC_ON_ABORT)
 3204                                 panic("inpcb_free does an abort");
 3205 #endif
 3206                                 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
 3207                                 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
 3208                                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
 3209                                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
 3210                                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
 3211                                 }
 3212                                 if (sctp_free_assoc(inp, asoc,
 3213                                     SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) {
 3214                                         cnt_in_sd++;
 3215                                 }
 3216                                 continue;
 3217                         } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
 3218                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
 3219                                     (asoc->asoc.stream_queue_cnt == 0)
 3220                             ) {
 3221                                 if (asoc->asoc.locked_on_sending) {
 3222                                         goto abort_anyway;
 3223                                 }
 3224                                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
 3225                                     (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
 3226                                         /*
 3227                                          * there is nothing queued to send,
 3228                                          * so I send shutdown
 3229                                          */
 3230                                         sctp_send_shutdown(asoc, asoc->asoc.primary_destination);
 3231                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
 3232                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
 3233                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
 3234                                         }
 3235                                         SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT);
 3236                                         SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING);
 3237                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
 3238                                             asoc->asoc.primary_destination);
 3239                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
 3240                                             asoc->asoc.primary_destination);
 3241                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED);
 3242                                 }
 3243                         } else {
 3244                                 /* mark into shutdown pending */
 3245                                 struct sctp_stream_queue_pending *sp;
 3246 
 3247                                 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING;
 3248                                 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
 3249                                     asoc->asoc.primary_destination);
 3250                                 if (asoc->asoc.locked_on_sending) {
 3251                                         sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue),
 3252                                             sctp_streamhead);
 3253                                         if (sp == NULL) {
 3254                                                 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n",
 3255                                                     asoc->asoc.locked_on_sending,
 3256                                                     asoc->asoc.locked_on_sending->stream_no);
 3257                                         } else {
 3258                                                 if ((sp->length == 0) && (sp->msg_is_complete == 0))
 3259                                                         asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT;
 3260                                         }
 3261                                 }
 3262                                 if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
 3263                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
 3264                                     (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
 3265                                         struct mbuf *op_err;
 3266 
 3267                         abort_anyway:
 3268                                         op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
 3269                                             0, M_DONTWAIT, 1, MT_DATA);
 3270                                         if (op_err) {
 3271                                                 /*
 3272                                                  * Fill in the user
 3273                                                  * initiated abort
 3274                                                  */
 3275                                                 struct sctp_paramhdr *ph;
 3276                                                 uint32_t *ippp;
 3277 
 3278                                                 SCTP_BUF_LEN(op_err) =
 3279                                                     (sizeof(struct sctp_paramhdr) +
 3280                                                     sizeof(uint32_t));
 3281                                                 ph = mtod(op_err,
 3282                                                     struct sctp_paramhdr *);
 3283                                                 ph->param_type = htons(
 3284                                                     SCTP_CAUSE_USER_INITIATED_ABT);
 3285                                                 ph->param_length = htons(SCTP_BUF_LEN(op_err));
 3286                                                 ippp = (uint32_t *) (ph + 1);
 3287                                                 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_5);
 3288                                         }
 3289                                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5;
 3290 #if defined(SCTP_PANIC_ON_ABORT)
 3291                                         panic("inpcb_free does an abort");
 3292 #endif
 3293 
 3294                                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
 3295                                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
 3296                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
 3297                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
 3298                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
 3299                                         }
 3300                                         if (sctp_free_assoc(inp, asoc,
 3301                                             SCTP_PCBFREE_NOFORCE,
 3302                                             SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) {
 3303                                                 cnt_in_sd++;
 3304                                         }
 3305                                         continue;
 3306                                 } else {
 3307                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED);
 3308                                 }
 3309                         }
 3310                         cnt_in_sd++;
 3311                         SCTP_TCB_UNLOCK(asoc);
 3312                 }
 3313                 /* now is there some left in our SHUTDOWN state? */
 3314                 if (cnt_in_sd) {
 3315                         SCTP_INP_WUNLOCK(inp);
 3316                         SCTP_ASOC_CREATE_UNLOCK(inp);
 3317                         SCTP_INP_INFO_WUNLOCK();
 3318                         SCTP_ITERATOR_UNLOCK();
 3319 #ifdef SCTP_LOG_CLOSING
 3320                         sctp_log_closing(inp, NULL, 2);
 3321 #endif
 3322                         inp->sctp_socket = NULL;
 3323                         return;
 3324                 }
 3325         }
 3326         inp->sctp_socket = NULL;
 3327         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
 3328             SCTP_PCB_FLAGS_UNBOUND) {
 3329                 /*
 3330                  * ok, this guy has been bound. It's port is somewhere in
 3331                  * the SCTP_BASE_INFO(hash table). Remove it!
 3332                  */
 3333                 LIST_REMOVE(inp, sctp_hash);
 3334                 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND;
 3335         }
 3336         /*
 3337          * If there is a timer running to kill us, forget it, since it may
 3338          * have a contest on the INP lock.. which would cause us to die ...
 3339          */
 3340         cnt = 0;
 3341         for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL;
 3342             asoc = nasoc) {
 3343                 nasoc = LIST_NEXT(asoc, sctp_tcblist);
 3344                 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
 3345                         cnt++;
 3346                         continue;
 3347                 }
 3348                 /* Free associations that are NOT killing us */
 3349                 SCTP_TCB_LOCK(asoc);
 3350                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) &&
 3351                     ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) {
 3352                         struct mbuf *op_err;
 3353                         uint32_t *ippp;
 3354 
 3355                         op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
 3356                             0, M_DONTWAIT, 1, MT_DATA);
 3357                         if (op_err) {
 3358                                 /* Fill in the user initiated abort */
 3359                                 struct sctp_paramhdr *ph;
 3360 
 3361                                 SCTP_BUF_LEN(op_err) = (sizeof(struct sctp_paramhdr) +
 3362                                     sizeof(uint32_t));
 3363                                 ph = mtod(op_err, struct sctp_paramhdr *);
 3364                                 ph->param_type = htons(
 3365                                     SCTP_CAUSE_USER_INITIATED_ABT);
 3366                                 ph->param_length = htons(SCTP_BUF_LEN(op_err));
 3367                                 ippp = (uint32_t *) (ph + 1);
 3368                                 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_7);
 3369 
 3370                         }
 3371                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7;
 3372 #if defined(SCTP_PANIC_ON_ABORT)
 3373                         panic("inpcb_free does an abort");
 3374 #endif
 3375                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
 3376                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
 3377                 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
 3378                         cnt++;
 3379                         SCTP_TCB_UNLOCK(asoc);
 3380                         continue;
 3381                 }
 3382                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
 3383                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
 3384                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
 3385                 }
 3386                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) {
 3387                         cnt++;
 3388                 }
 3389         }
 3390         if (cnt) {
 3391                 /* Ok we have someone out there that will kill us */
 3392                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
 3393                 SCTP_INP_WUNLOCK(inp);
 3394                 SCTP_ASOC_CREATE_UNLOCK(inp);
 3395                 SCTP_INP_INFO_WUNLOCK();
 3396                 SCTP_ITERATOR_UNLOCK();
 3397 #ifdef SCTP_LOG_CLOSING
 3398                 sctp_log_closing(inp, NULL, 3);
 3399 #endif
 3400                 return;
 3401         }
 3402         if ((inp->refcount) || (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) {
 3403                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
 3404                 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
 3405                 SCTP_INP_WUNLOCK(inp);
 3406                 SCTP_ASOC_CREATE_UNLOCK(inp);
 3407                 SCTP_INP_INFO_WUNLOCK();
 3408                 SCTP_ITERATOR_UNLOCK();
 3409 #ifdef SCTP_LOG_CLOSING
 3410                 sctp_log_closing(inp, NULL, 4);
 3411 #endif
 3412                 return;
 3413         }
 3414         (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
 3415         inp->sctp_ep.signature_change.type = 0;
 3416         inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
 3417 
 3418 #ifdef SCTP_LOG_CLOSING
 3419         sctp_log_closing(inp, NULL, 5);
 3420 #endif
 3421 
 3422         (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
 3423         inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NONE;
 3424         /* Clear the read queue */
 3425         if ((inp->sctp_asocidhash) != NULL) {
 3426                 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark);
 3427                 inp->sctp_asocidhash = NULL;
 3428         }
 3429         /* sa_ignore FREED_MEMORY */
 3430         while ((sq = TAILQ_FIRST(&inp->read_queue)) != NULL) {
 3431                 /* Its only abandoned if it had data left */
 3432                 if (sq->length)
 3433                         SCTP_STAT_INCR(sctps_left_abandon);
 3434 
 3435                 TAILQ_REMOVE(&inp->read_queue, sq, next);
 3436                 sctp_free_remote_addr(sq->whoFrom);
 3437                 if (so)
 3438                         so->so_rcv.sb_cc -= sq->length;
 3439                 if (sq->data) {
 3440                         sctp_m_freem(sq->data);
 3441                         sq->data = NULL;
 3442                 }
 3443                 /*
 3444                  * no need to free the net count, since at this point all
 3445                  * assoc's are gone.
 3446                  */
 3447                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq);
 3448                 SCTP_DECR_READQ_COUNT();
 3449         }
 3450         /* Now the sctp_pcb things */
 3451         /*
 3452          * free each asoc if it is not already closed/free. we can't use the
 3453          * macro here since le_next will get freed as part of the
 3454          * sctp_free_assoc() call.
 3455          */
 3456         cnt = 0;
 3457         if (so) {
 3458 #ifdef IPSEC
 3459                 ipsec_delete_pcbpolicy(ip_pcb);
 3460 #endif                          /* IPSEC */
 3461 
 3462                 /* Unlocks not needed since the socket is gone now */
 3463         }
 3464         if (ip_pcb->inp_options) {
 3465                 (void)sctp_m_free(ip_pcb->inp_options);
 3466                 ip_pcb->inp_options = 0;
 3467         }
 3468         if (ip_pcb->inp_moptions) {
 3469                 inp_freemoptions(ip_pcb->inp_moptions);
 3470                 ip_pcb->inp_moptions = 0;
 3471         }
 3472 #ifdef INET6
 3473         if (ip_pcb->inp_vflag & INP_IPV6) {
 3474                 struct in6pcb *in6p;
 3475 
 3476                 in6p = (struct in6pcb *)inp;
 3477                 ip6_freepcbopts(in6p->in6p_outputopts);
 3478         }
 3479 #endif                          /* INET6 */
 3480         ip_pcb->inp_vflag = 0;
 3481         /* free up authentication fields */
 3482         if (inp->sctp_ep.local_auth_chunks != NULL)
 3483                 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
 3484         if (inp->sctp_ep.local_hmacs != NULL)
 3485                 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
 3486 
 3487         shared_key = LIST_FIRST(&inp->sctp_ep.shared_keys);
 3488         while (shared_key) {
 3489                 LIST_REMOVE(shared_key, next);
 3490                 sctp_free_sharedkey(shared_key);
 3491                 /* sa_ignore FREED_MEMORY */
 3492                 shared_key = LIST_FIRST(&inp->sctp_ep.shared_keys);
 3493         }
 3494 
 3495         inp_save = LIST_NEXT(inp, sctp_list);
 3496         LIST_REMOVE(inp, sctp_list);
 3497 
 3498         /* fix any iterators only after out of the list */
 3499         sctp_iterator_inp_being_freed(inp, inp_save);
 3500         /*
 3501          * if we have an address list the following will free the list of
 3502          * ifaddr's that are set into this ep. Again macro limitations here,
 3503          * since the LIST_FOREACH could be a bad idea.
 3504          */
 3505         for ((laddr = LIST_FIRST(&inp->sctp_addr_list)); laddr != NULL;
 3506             laddr = nladdr) {
 3507                 nladdr = LIST_NEXT(laddr, sctp_nxt_addr);
 3508                 sctp_remove_laddr(laddr);
 3509         }
 3510 
 3511 #ifdef SCTP_TRACK_FREED_ASOCS
 3512         /* TEMP CODE */
 3513         for ((asoc = LIST_FIRST(&inp->sctp_asoc_free_list)); asoc != NULL;
 3514             asoc = nasoc) {
 3515                 nasoc = LIST_NEXT(asoc, sctp_tcblist);
 3516                 LIST_REMOVE(asoc, sctp_tcblist);
 3517                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc);
 3518                 SCTP_DECR_ASOC_COUNT();
 3519         }
 3520         /* *** END TEMP CODE *** */
 3521 #endif
 3522         /* Now lets see about freeing the EP hash table. */
 3523         if (inp->sctp_tcbhash != NULL) {
 3524                 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
 3525                 inp->sctp_tcbhash = NULL;
 3526         }
 3527         /* Now we must put the ep memory back into the zone pool */
 3528         INP_LOCK_DESTROY(&inp->ip_inp.inp);
 3529         SCTP_INP_LOCK_DESTROY(inp);
 3530         SCTP_INP_READ_DESTROY(inp);
 3531         SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
 3532         SCTP_INP_INFO_WUNLOCK();
 3533         SCTP_ITERATOR_UNLOCK();
 3534         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
 3535         SCTP_DECR_EP_COUNT();
 3536 }
 3537 
 3538 
 3539 struct sctp_nets *
 3540 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
 3541 {
 3542         struct sctp_nets *net;
 3543 
 3544         /* locate the address */
 3545         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 3546                 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
 3547                         return (net);
 3548         }
 3549         return (NULL);
 3550 }
 3551 
 3552 
 3553 int
 3554 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id)
 3555 {
 3556         struct sctp_ifa *sctp_ifa;
 3557 
 3558         sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED);
 3559         if (sctp_ifa) {
 3560                 return (1);
 3561         } else {
 3562                 return (0);
 3563         }
 3564 }
 3565 
 3566 /*
 3567  * add's a remote endpoint address, done with the INIT/INIT-ACK as well as
 3568  * when a ASCONF arrives that adds it. It will also initialize all the cwnd
 3569  * stats of stuff.
 3570  */
 3571 int
 3572 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
 3573     int set_scope, int from)
 3574 {
 3575         /*
 3576          * The following is redundant to the same lines in the
 3577          * sctp_aloc_assoc() but is needed since other's call the add
 3578          * address function
 3579          */
 3580         struct sctp_nets *net, *netfirst;
 3581         int addr_inscope;
 3582 
 3583         SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ",
 3584             from);
 3585         SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr);
 3586 
 3587         netfirst = sctp_findnet(stcb, newaddr);
 3588         if (netfirst) {
 3589                 /*
 3590                  * Lie and return ok, we don't want to make the association
 3591                  * go away for this behavior. It will happen in the TCP
 3592                  * model in a connected socket. It does not reach the hash
 3593                  * table until after the association is built so it can't be
 3594                  * found. Mark as reachable, since the initial creation will
 3595                  * have been cleared and the NOT_IN_ASSOC flag will have
 3596                  * been added... and we don't want to end up removing it
 3597                  * back out.
 3598                  */
 3599                 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
 3600                         netfirst->dest_state = (SCTP_ADDR_REACHABLE |
 3601                             SCTP_ADDR_UNCONFIRMED);
 3602                 } else {
 3603                         netfirst->dest_state = SCTP_ADDR_REACHABLE;
 3604                 }
 3605 
 3606                 return (0);
 3607         }
 3608         addr_inscope = 1;
 3609         if (newaddr->sa_family == AF_INET) {
 3610                 struct sockaddr_in *sin;
 3611 
 3612                 sin = (struct sockaddr_in *)newaddr;
 3613                 if (sin->sin_addr.s_addr == 0) {
 3614                         /* Invalid address */
 3615                         return (-1);
 3616                 }
 3617                 /* zero out the bzero area */
 3618                 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
 3619 
 3620                 /* assure len is set */
 3621                 sin->sin_len = sizeof(struct sockaddr_in);
 3622                 if (set_scope) {
 3623 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE
 3624                         stcb->ipv4_local_scope = 1;
 3625 #else
 3626                         if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
 3627                                 stcb->asoc.ipv4_local_scope = 1;
 3628                         }
 3629 #endif                          /* SCTP_DONT_DO_PRIVADDR_SCOPE */
 3630                 } else {
 3631                         /* Validate the address is in scope */
 3632                         if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
 3633                             (stcb->asoc.ipv4_local_scope == 0)) {
 3634                                 addr_inscope = 0;
 3635                         }
 3636                 }
 3637 #ifdef INET6
 3638         } else if (newaddr->sa_family == AF_INET6) {
 3639                 struct sockaddr_in6 *sin6;
 3640 
 3641                 sin6 = (struct sockaddr_in6 *)newaddr;
 3642                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
 3643                         /* Invalid address */
 3644                         return (-1);
 3645                 }
 3646                 /* assure len is set */
 3647                 sin6->sin6_len = sizeof(struct sockaddr_in6);
 3648                 if (set_scope) {
 3649                         if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) {
 3650                                 stcb->asoc.loopback_scope = 1;
 3651                                 stcb->asoc.local_scope = 0;
 3652                                 stcb->asoc.ipv4_local_scope = 1;
 3653                                 stcb->asoc.site_scope = 1;
 3654                         } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
 3655                                 /*
 3656                                  * If the new destination is a LINK_LOCAL we
 3657                                  * must have common site scope. Don't set
 3658                                  * the local scope since we may not share
 3659                                  * all links, only loopback can do this.
 3660                                  * Links on the local network would also be
 3661                                  * on our private network for v4 too.
 3662                                  */
 3663                                 stcb->asoc.ipv4_local_scope = 1;
 3664                                 stcb->asoc.site_scope = 1;
 3665                         } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
 3666                                 /*
 3667                                  * If the new destination is SITE_LOCAL then
 3668                                  * we must have site scope in common.
 3669                                  */
 3670                                 stcb->asoc.site_scope = 1;
 3671                         }
 3672                 } else {
 3673                         /* Validate the address is in scope */
 3674                         if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
 3675                             (stcb->asoc.loopback_scope == 0)) {
 3676                                 addr_inscope = 0;
 3677                         } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
 3678                             (stcb->asoc.local_scope == 0)) {
 3679                                 addr_inscope = 0;
 3680                         } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
 3681                             (stcb->asoc.site_scope == 0)) {
 3682                                 addr_inscope = 0;
 3683                         }
 3684                 }
 3685 #endif
 3686         } else {
 3687                 /* not supported family type */
 3688                 return (-1);
 3689         }
 3690         net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets);
 3691         if (net == NULL) {
 3692                 return (-1);
 3693         }
 3694         SCTP_INCR_RADDR_COUNT();
 3695         bzero(net, sizeof(*net));
 3696         (void)SCTP_GETTIME_TIMEVAL(&net->start_time);
 3697         memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
 3698         if (newaddr->sa_family == AF_INET) {
 3699                 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
 3700         } else if (newaddr->sa_family == AF_INET6) {
 3701                 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
 3702         }
 3703         net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id);
 3704         if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) {
 3705                 stcb->asoc.loopback_scope = 1;
 3706                 stcb->asoc.ipv4_local_scope = 1;
 3707                 stcb->asoc.local_scope = 0;
 3708                 stcb->asoc.site_scope = 1;
 3709                 addr_inscope = 1;
 3710         }
 3711         net->failure_threshold = stcb->asoc.def_net_failure;
 3712         if (addr_inscope == 0) {
 3713                 net->dest_state = (SCTP_ADDR_REACHABLE |
 3714                     SCTP_ADDR_OUT_OF_SCOPE);
 3715         } else {
 3716                 if (from == SCTP_ADDR_IS_CONFIRMED)
 3717                         /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */
 3718                         net->dest_state = SCTP_ADDR_REACHABLE;
 3719                 else
 3720                         net->dest_state = SCTP_ADDR_REACHABLE |
 3721                             SCTP_ADDR_UNCONFIRMED;
 3722         }
 3723         /*
 3724          * We set this to 0, the timer code knows that this means its an
 3725          * initial value
 3726          */
 3727         net->RTO = 0;
 3728         net->RTO_measured = 0;
 3729         stcb->asoc.numnets++;
 3730         *(&net->ref_count) = 1;
 3731         net->tos_flowlabel = 0;
 3732         if (SCTP_BASE_SYSCTL(sctp_udp_tunneling_for_client_enable)) {
 3733                 net->port = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
 3734         } else {
 3735                 net->port = 0;
 3736         }
 3737 #ifdef INET
 3738         if (newaddr->sa_family == AF_INET)
 3739                 net->tos_flowlabel = stcb->asoc.default_tos;
 3740 #endif
 3741 #ifdef INET6
 3742         if (newaddr->sa_family == AF_INET6)
 3743                 net->tos_flowlabel = stcb->asoc.default_flowlabel;
 3744 #endif
 3745         /* Init the timer structure */
 3746         SCTP_OS_TIMER_INIT(&net->rxt_timer.timer);
 3747         SCTP_OS_TIMER_INIT(&net->fr_timer.timer);
 3748         SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer);
 3749 
 3750         /* Now generate a route for this guy */
 3751 #ifdef INET6
 3752         /* KAME hack: embed scopeid */
 3753         if (newaddr->sa_family == AF_INET6) {
 3754                 struct sockaddr_in6 *sin6;
 3755 
 3756                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
 3757                 (void)sa6_embedscope(sin6, MODULE_GLOBAL(MOD_INET6, ip6_use_defzone));
 3758                 sin6->sin6_scope_id = 0;
 3759         }
 3760 #endif
 3761         SCTP_RTALLOC((sctp_route_t *) & net->ro, stcb->asoc.vrf_id);
 3762 
 3763         if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) {
 3764                 /* Get source address */
 3765                 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep,
 3766                     stcb,
 3767                     (sctp_route_t *) & net->ro,
 3768                     net,
 3769                     0,
 3770                     stcb->asoc.vrf_id);
 3771                 /* Now get the interface MTU */
 3772                 if (net->ro._s_addr && net->ro._s_addr->ifn_p) {
 3773                         net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p);
 3774                 } else {
 3775                         net->mtu = 0;
 3776                 }
 3777 #ifdef SCTP_PRINT_FOR_B_AND_M
 3778                 SCTP_PRINTF("We have found an interface mtu of %d\n", net->mtu);
 3779 #endif
 3780                 if (net->mtu == 0) {
 3781                         /* Huh ?? */
 3782                         net->mtu = SCTP_DEFAULT_MTU;
 3783                 } else {
 3784                         uint32_t rmtu;
 3785 
 3786                         rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt);
 3787 #ifdef SCTP_PRINT_FOR_B_AND_M
 3788                         SCTP_PRINTF("The route mtu is %d\n", rmtu);
 3789 #endif
 3790                         if (rmtu == 0) {
 3791                                 /*
 3792                                  * Start things off to match mtu of
 3793                                  * interface please.
 3794                                  */
 3795                                 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa,
 3796                                     net->ro.ro_rt, net->mtu);
 3797                         } else {
 3798                                 /*
 3799                                  * we take the route mtu over the interface,
 3800                                  * since the route may be leading out the
 3801                                  * loopback, or a different interface.
 3802                                  */
 3803                                 net->mtu = rmtu;
 3804                         }
 3805                 }
 3806                 if (from == SCTP_ALLOC_ASOC) {
 3807 #ifdef SCTP_PRINT_FOR_B_AND_M
 3808                         SCTP_PRINTF("New assoc sets mtu to :%d\n", net->mtu);
 3809 #endif
 3810                         stcb->asoc.smallest_mtu = net->mtu;
 3811                 }
 3812         } else {
 3813                 net->mtu = stcb->asoc.smallest_mtu;
 3814         }
 3815 #ifdef INET6
 3816         if (newaddr->sa_family == AF_INET6) {
 3817                 struct sockaddr_in6 *sin6;
 3818 
 3819                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
 3820                 (void)sa6_recoverscope(sin6);
 3821         }
 3822 #endif
 3823         if (net->port) {
 3824                 net->mtu -= sizeof(struct udphdr);
 3825         }
 3826         if (stcb->asoc.smallest_mtu > net->mtu) {
 3827 #ifdef SCTP_PRINT_FOR_B_AND_M
 3828                 SCTP_PRINTF("new address mtu:%d smaller than smallest:%d\n",
 3829                     net->mtu, stcb->asoc.smallest_mtu);
 3830 #endif
 3831                 stcb->asoc.smallest_mtu = net->mtu;
 3832         }
 3833         /* JRS - Use the congestion control given in the CC module */
 3834         stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net);
 3835 
 3836         /*
 3837          * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning
 3838          * of assoc (2005/06/27, iyengar@cis.udel.edu)
 3839          */
 3840         net->find_pseudo_cumack = 1;
 3841         net->find_rtx_pseudo_cumack = 1;
 3842         net->src_addr_selected = 0;
 3843         netfirst = TAILQ_FIRST(&stcb->asoc.nets);
 3844         if (net->ro.ro_rt == NULL) {
 3845                 /* Since we have no route put it at the back */
 3846                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
 3847         } else if (netfirst == NULL) {
 3848                 /* We are the first one in the pool. */
 3849                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
 3850         } else if (netfirst->ro.ro_rt == NULL) {
 3851                 /*
 3852                  * First one has NO route. Place this one ahead of the first
 3853                  * one.
 3854                  */
 3855                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
 3856         } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) {
 3857                 /*
 3858                  * This one has a different interface than the one at the
 3859                  * top of the list. Place it ahead.
 3860                  */
 3861                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
 3862         } else {
 3863                 /*
 3864                  * Ok we have the same interface as the first one. Move
 3865                  * forward until we find either a) one with a NULL route...
 3866                  * insert ahead of that b) one with a different ifp.. insert
 3867                  * after that. c) end of the list.. insert at the tail.
 3868                  */
 3869                 struct sctp_nets *netlook;
 3870 
 3871                 do {
 3872                         netlook = TAILQ_NEXT(netfirst, sctp_next);
 3873                         if (netlook == NULL) {
 3874                                 /* End of the list */
 3875                                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
 3876                                 break;
 3877                         } else if (netlook->ro.ro_rt == NULL) {
 3878                                 /* next one has NO route */
 3879                                 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
 3880                                 break;
 3881                         } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) {
 3882                                 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
 3883                                     net, sctp_next);
 3884                                 break;
 3885                         }
 3886                         /* Shift forward */
 3887                         netfirst = netlook;
 3888                 } while (netlook != NULL);
 3889         }
 3890 
 3891         /* got to have a primary set */
 3892         if (stcb->asoc.primary_destination == 0) {
 3893                 stcb->asoc.primary_destination = net;
 3894         } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) &&
 3895                     (net->ro.ro_rt) &&
 3896             ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
 3897                 /* No route to current primary adopt new primary */
 3898                 stcb->asoc.primary_destination = net;
 3899         }
 3900         sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb,
 3901             net);
 3902         /* Validate primary is first */
 3903         net = TAILQ_FIRST(&stcb->asoc.nets);
 3904         if ((net != stcb->asoc.primary_destination) &&
 3905             (stcb->asoc.primary_destination)) {
 3906                 /*
 3907                  * first one on the list is NOT the primary sctp_cmpaddr()
 3908                  * is much more efficent if the primary is the first on the
 3909                  * list, make it so.
 3910                  */
 3911                 TAILQ_REMOVE(&stcb->asoc.nets,
 3912                     stcb->asoc.primary_destination, sctp_next);
 3913                 TAILQ_INSERT_HEAD(&stcb->asoc.nets,
 3914                     stcb->asoc.primary_destination, sctp_next);
 3915         }
 3916         return (0);
 3917 }
 3918 
 3919 
 3920 static uint32_t
 3921 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
 3922 {
 3923         uint32_t id;
 3924         struct sctpasochead *head;
 3925         struct sctp_tcb *lstcb;
 3926 
 3927 try_again:
 3928         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
 3929                 /* TSNH */
 3930                 return (0);
 3931         }
 3932         SCTP_INP_WLOCK(inp);
 3933         id = inp->sctp_associd_counter;
 3934         inp->sctp_associd_counter++;
 3935         lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t) id, 0);
 3936         if (lstcb) {
 3937                 goto try_again;
 3938         }
 3939         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
 3940         LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash);
 3941         stcb->asoc.in_asocid_hash = 1;
 3942         SCTP_INP_WUNLOCK(inp);
 3943         return id;
 3944 }
 3945 
 3946 /*
 3947  * allocate an association and add it to the endpoint. The caller must be
 3948  * careful to add all additional addresses once they are know right away or
 3949  * else the assoc will be may experience a blackout scenario.
 3950  */
 3951 struct sctp_tcb *
 3952 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
 3953     int for_a_init, int *error, uint32_t override_tag, uint32_t vrf_id,
 3954     struct thread *p
 3955 )
 3956 {
 3957         /* note the p argument is only valid in unbound sockets */
 3958 
 3959         struct sctp_tcb *stcb;
 3960         struct sctp_association *asoc;
 3961         struct sctpasochead *head;
 3962         uint16_t rport;
 3963         int err;
 3964 
 3965         /*
 3966          * Assumption made here: Caller has done a
 3967          * sctp_findassociation_ep_addr(ep, addr's); to make sure the
 3968          * address does not exist already.
 3969          */
 3970         if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) {
 3971                 /* Hit max assoc, sorry no more */
 3972                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
 3973                 *error = ENOBUFS;
 3974                 return (NULL);
 3975         }
 3976         if (firstaddr == NULL) {
 3977                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
 3978                 *error = EINVAL;
 3979                 return (NULL);
 3980         }
 3981         SCTP_INP_RLOCK(inp);
 3982         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) &&
 3983             ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) ||
 3984             (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) {
 3985                 /*
 3986                  * If its in the TCP pool, its NOT allowed to create an
 3987                  * association. The parent listener needs to call
 3988                  * sctp_aloc_assoc.. or the one-2-many socket. If a peeled
 3989                  * off, or connected one does this.. its an error.
 3990                  */
 3991                 SCTP_INP_RUNLOCK(inp);
 3992                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
 3993                 *error = EINVAL;
 3994                 return (NULL);
 3995         }
 3996         SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:");
 3997 #ifdef SCTP_DEBUG
 3998         if (firstaddr) {
 3999                 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr);
 4000                 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
 4001                     ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
 4002         } else {
 4003                 SCTPDBG(SCTP_DEBUG_PCB3, "None\n");
 4004         }
 4005 #endif                          /* SCTP_DEBUG */
 4006         if (firstaddr->sa_family == AF_INET) {
 4007                 struct sockaddr_in *sin;
 4008 
 4009                 sin = (struct sockaddr_in *)firstaddr;
 4010                 if ((sin->sin_port == 0) || (sin->sin_addr.s_addr == 0)) {
 4011                         /* Invalid address */
 4012                         SCTP_INP_RUNLOCK(inp);
 4013                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
 4014                         *error = EINVAL;
 4015                         return (NULL);
 4016                 }
 4017                 rport = sin->sin_port;
 4018         } else if (firstaddr->sa_family == AF_INET6) {
 4019                 struct sockaddr_in6 *sin6;
 4020 
 4021                 sin6 = (struct sockaddr_in6 *)firstaddr;
 4022                 if ((sin6->sin6_port == 0) ||
 4023                     (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) {
 4024                         /* Invalid address */
 4025                         SCTP_INP_RUNLOCK(inp);
 4026                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
 4027                         *error = EINVAL;
 4028                         return (NULL);
 4029                 }
 4030                 rport = sin6->sin6_port;
 4031         } else {
 4032                 /* not supported family type */
 4033                 SCTP_INP_RUNLOCK(inp);
 4034                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
 4035                 *error = EINVAL;
 4036                 return (NULL);
 4037         }
 4038         SCTP_INP_RUNLOCK(inp);
 4039         if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
 4040                 /*
 4041                  * If you have not performed a bind, then we need to do the
 4042                  * ephemerial bind for you.
 4043                  */
 4044                 if ((err = sctp_inpcb_bind(inp->sctp_socket,
 4045                     (struct sockaddr *)NULL,
 4046                     (struct sctp_ifa *)NULL,
 4047                     p
 4048                     ))) {
 4049                         /* bind error, probably perm */
 4050                         *error = err;
 4051                         return (NULL);
 4052                 }
 4053         }
 4054         stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb);
 4055         if (stcb == NULL) {
 4056                 /* out of memory? */
 4057                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
 4058                 *error = ENOMEM;
 4059                 return (NULL);
 4060         }
 4061         SCTP_INCR_ASOC_COUNT();
 4062 
 4063         bzero(stcb, sizeof(*stcb));
 4064         asoc = &stcb->asoc;
 4065 
 4066         asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb);
 4067         SCTP_TCB_LOCK_INIT(stcb);
 4068         SCTP_TCB_SEND_LOCK_INIT(stcb);
 4069         stcb->rport = rport;
 4070         /* setup back pointer's */
 4071         stcb->sctp_ep = inp;
 4072         stcb->sctp_socket = inp->sctp_socket;
 4073         if ((err = sctp_init_asoc(inp, stcb, for_a_init, override_tag, vrf_id))) {
 4074                 /* failed */
 4075                 SCTP_TCB_LOCK_DESTROY(stcb);
 4076                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
 4077                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
 4078                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
 4079                 SCTP_DECR_ASOC_COUNT();
 4080                 *error = err;
 4081                 return (NULL);
 4082         }
 4083         /* and the port */
 4084         SCTP_INP_INFO_WLOCK();
 4085         SCTP_INP_WLOCK(inp);
 4086         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
 4087                 /* inpcb freed while alloc going on */
 4088                 SCTP_TCB_LOCK_DESTROY(stcb);
 4089                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
 4090                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
 4091                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
 4092                 SCTP_INP_WUNLOCK(inp);
 4093                 SCTP_INP_INFO_WUNLOCK();
 4094                 SCTP_DECR_ASOC_COUNT();
 4095                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
 4096                 *error = EINVAL;
 4097                 return (NULL);
 4098         }
 4099         SCTP_TCB_LOCK(stcb);
 4100 
 4101         /* now that my_vtag is set, add it to the hash */
 4102         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
 4103         /* put it in the bucket in the vtag hash of assoc's for the system */
 4104         LIST_INSERT_HEAD(head, stcb, sctp_asocs);
 4105         SCTP_INP_INFO_WUNLOCK();
 4106 
 4107         if ((err = sctp_add_remote_addr(stcb, firstaddr, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) {
 4108                 /* failure.. memory error? */
 4109                 if (asoc->strmout) {
 4110                         SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
 4111                         asoc->strmout = NULL;
 4112                 }
 4113                 if (asoc->mapping_array) {
 4114                         SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
 4115                         asoc->mapping_array = NULL;
 4116                 }
 4117                 if (asoc->nr_mapping_array) {
 4118                         SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
 4119                         asoc->nr_mapping_array = NULL;
 4120                 }
 4121                 SCTP_DECR_ASOC_COUNT();
 4122                 SCTP_TCB_LOCK_DESTROY(stcb);
 4123                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
 4124                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
 4125                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
 4126                 SCTP_INP_WUNLOCK(inp);
 4127                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
 4128                 *error = ENOBUFS;
 4129                 return (NULL);
 4130         }
 4131         /* Init all the timers */
 4132         SCTP_OS_TIMER_INIT(&asoc->hb_timer.timer);
 4133         SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer);
 4134         SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer);
 4135         SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer);
 4136         SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer);
 4137         SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer);
 4138         SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer);
 4139         SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer);
 4140 
 4141         LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
 4142         /* now file the port under the hash as well */
 4143         if (inp->sctp_tcbhash != NULL) {
 4144                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
 4145                     inp->sctp_hashmark)];
 4146                 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
 4147         }
 4148         SCTP_INP_WUNLOCK(inp);
 4149         SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", stcb);
 4150         return (stcb);
 4151 }
 4152 
 4153 
 4154 void
 4155 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net)
 4156 {
 4157         struct sctp_association *asoc;
 4158 
 4159         asoc = &stcb->asoc;
 4160         asoc->numnets--;
 4161         TAILQ_REMOVE(&asoc->nets, net, sctp_next);
 4162         if (net == asoc->primary_destination) {
 4163                 /* Reset primary */
 4164                 struct sctp_nets *lnet;
 4165 
 4166                 lnet = TAILQ_FIRST(&asoc->nets);
 4167                 /*
 4168                  * Mobility adaptation Ideally, if deleted destination is
 4169                  * the primary, it becomes a fast retransmission trigger by
 4170                  * the subsequent SET PRIMARY. (by micchie)
 4171                  */
 4172                 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
 4173                     SCTP_MOBILITY_BASE) ||
 4174                     sctp_is_mobility_feature_on(stcb->sctp_ep,
 4175                     SCTP_MOBILITY_FASTHANDOFF)) {
 4176                         SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n");
 4177                         if (asoc->deleted_primary != NULL) {
 4178                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n");
 4179                                 goto out;
 4180                         }
 4181                         asoc->deleted_primary = net;
 4182                         atomic_add_int(&net->ref_count, 1);
 4183                         memset(&net->lastsa, 0, sizeof(net->lastsa));
 4184                         memset(&net->lastsv, 0, sizeof(net->lastsv));
 4185                         sctp_mobility_feature_on(stcb->sctp_ep,
 4186                             SCTP_MOBILITY_PRIM_DELETED);
 4187                         sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED,
 4188                             stcb->sctp_ep, stcb, NULL);
 4189                 }
 4190 out:
 4191                 /* Try to find a confirmed primary */
 4192                 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0);
 4193         }
 4194         if (net == asoc->last_data_chunk_from) {
 4195                 /* Reset primary */
 4196                 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets);
 4197         }
 4198         if (net == asoc->last_control_chunk_from) {
 4199                 /* Clear net */
 4200                 asoc->last_control_chunk_from = NULL;
 4201         }
 4202         sctp_free_remote_addr(net);
 4203 }
 4204 
 4205 /*
 4206  * remove a remote endpoint address from an association, it will fail if the
 4207  * address does not exist.
 4208  */
 4209 int
 4210 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
 4211 {
 4212         /*
 4213          * Here we need to remove a remote address. This is quite simple, we
 4214          * first find it in the list of address for the association
 4215          * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE
 4216          * on that item. Note we do not allow it to be removed if there are
 4217          * no other addresses.
 4218          */
 4219         struct sctp_association *asoc;
 4220         struct sctp_nets *net, *net_tmp;
 4221 
 4222         asoc = &stcb->asoc;
 4223 
 4224         /* locate the address */
 4225         for (net = TAILQ_FIRST(&asoc->nets); net != NULL; net = net_tmp) {
 4226                 net_tmp = TAILQ_NEXT(net, sctp_next);
 4227                 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
 4228                         continue;
 4229                 }
 4230                 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
 4231                     remaddr)) {
 4232                         /* we found the guy */
 4233                         if (asoc->numnets < 2) {
 4234                                 /* Must have at LEAST two remote addresses */
 4235                                 return (-1);
 4236                         } else {
 4237                                 sctp_remove_net(stcb, net);
 4238                                 return (0);
 4239                         }
 4240                 }
 4241         }
 4242         /* not found. */
 4243         return (-2);
 4244 }
 4245 
 4246 void
 4247 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
 4248 {
 4249         struct sctpvtaghead *chain;
 4250         struct sctp_tagblock *twait_block;
 4251         int found = 0;
 4252         int i;
 4253 
 4254         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
 4255         if (!LIST_EMPTY(chain)) {
 4256                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
 4257                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
 4258                                 if ((twait_block->vtag_block[i].v_tag == tag) &&
 4259                                     (twait_block->vtag_block[i].lport == lport) &&
 4260                                     (twait_block->vtag_block[i].rport == rport)) {
 4261                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
 4262                                         twait_block->vtag_block[i].v_tag = 0;
 4263                                         twait_block->vtag_block[i].lport = 0;
 4264                                         twait_block->vtag_block[i].rport = 0;
 4265                                         found = 1;
 4266                                         break;
 4267                                 }
 4268                         }
 4269                         if (found)
 4270                                 break;
 4271                 }
 4272         }
 4273 }
 4274 
 4275 int
 4276 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
 4277 {
 4278         struct sctpvtaghead *chain;
 4279         struct sctp_tagblock *twait_block;
 4280         int found = 0;
 4281         int i;
 4282 
 4283         SCTP_INP_INFO_WLOCK();
 4284         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
 4285         if (!LIST_EMPTY(chain)) {
 4286                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
 4287                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
 4288                                 if ((twait_block->vtag_block[i].v_tag == tag) &&
 4289                                     (twait_block->vtag_block[i].lport == lport) &&
 4290                                     (twait_block->vtag_block[i].rport == rport)) {
 4291                                         found = 1;
 4292                                         break;
 4293                                 }
 4294                         }
 4295                         if (found)
 4296                                 break;
 4297                 }
 4298         }
 4299         SCTP_INP_INFO_WUNLOCK();
 4300         return (found);
 4301 }
 4302 
 4303 
 4304 void
 4305 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport)
 4306 {
 4307         struct sctpvtaghead *chain;
 4308         struct sctp_tagblock *twait_block;
 4309         struct timeval now;
 4310         int set, i;
 4311 
 4312         (void)SCTP_GETTIME_TIMEVAL(&now);
 4313         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
 4314         set = 0;
 4315         if (!LIST_EMPTY(chain)) {
 4316                 /* Block(s) present, lets find space, and expire on the fly */
 4317                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
 4318                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
 4319                                 if ((twait_block->vtag_block[i].v_tag == 0) &&
 4320                                     !set) {
 4321                                         twait_block->vtag_block[i].tv_sec_at_expire =
 4322                                             now.tv_sec + time;
 4323                                         twait_block->vtag_block[i].v_tag = tag;
 4324                                         twait_block->vtag_block[i].lport = lport;
 4325                                         twait_block->vtag_block[i].rport = rport;
 4326                                         set = 1;
 4327                                 } else if ((twait_block->vtag_block[i].v_tag) &&
 4328                                     ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) {
 4329                                         /* Audit expires this guy */
 4330                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
 4331                                         twait_block->vtag_block[i].v_tag = 0;
 4332                                         twait_block->vtag_block[i].lport = 0;
 4333                                         twait_block->vtag_block[i].rport = 0;
 4334                                         if (set == 0) {
 4335                                                 /* Reuse it for my new tag */
 4336                                                 twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time;
 4337                                                 twait_block->vtag_block[i].v_tag = tag;
 4338                                                 twait_block->vtag_block[i].lport = lport;
 4339                                                 twait_block->vtag_block[i].rport = rport;
 4340                                                 set = 1;
 4341                                         }
 4342                                 }
 4343                         }
 4344                         if (set) {
 4345                                 /*
 4346                                  * We only do up to the block where we can
 4347                                  * place our tag for audits
 4348                                  */
 4349                                 break;
 4350                         }
 4351                 }
 4352         }
 4353         /* Need to add a new block to chain */
 4354         if (!set) {
 4355                 SCTP_MALLOC(twait_block, struct sctp_tagblock *,
 4356                     sizeof(struct sctp_tagblock), SCTP_M_TIMW);
 4357                 if (twait_block == NULL) {
 4358 #ifdef INVARIANTS
 4359                         panic("Can not alloc tagblock");
 4360 #endif
 4361                         return;
 4362                 }
 4363                 memset(twait_block, 0, sizeof(struct sctp_tagblock));
 4364                 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
 4365                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time;
 4366                 twait_block->vtag_block[0].v_tag = tag;
 4367                 twait_block->vtag_block[0].lport = lport;
 4368                 twait_block->vtag_block[0].rport = rport;
 4369         }
 4370 }
 4371 
 4372 
 4373 static void
 4374 sctp_iterator_asoc_being_freed(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
 4375 {
 4376         struct sctp_iterator *it;
 4377 
 4378         /*
 4379          * Unlock the tcb lock we do this so we avoid a dead lock scenario
 4380          * where the iterator is waiting on the TCB lock and the TCB lock is
 4381          * waiting on the iterator lock.
 4382          */
 4383         it = stcb->asoc.stcb_starting_point_for_iterator;
 4384         if (it == NULL) {
 4385                 return;
 4386         }
 4387         if (it->inp != stcb->sctp_ep) {
 4388                 /* hmm, focused on the wrong one? */
 4389                 return;
 4390         }
 4391         if (it->stcb != stcb) {
 4392                 return;
 4393         }
 4394         it->stcb = LIST_NEXT(stcb, sctp_tcblist);
 4395         if (it->stcb == NULL) {
 4396                 /* done with all asoc's in this assoc */
 4397                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
 4398                         it->inp = NULL;
 4399                 } else {
 4400                         it->inp = LIST_NEXT(inp, sctp_list);
 4401                 }
 4402         }
 4403 }
 4404 
 4405 
 4406 /*-
 4407  * Free the association after un-hashing the remote port. This
 4408  * function ALWAYS returns holding NO LOCK on the stcb. It DOES
 4409  * expect that the input to this function IS a locked TCB.
 4410  * It will return 0, if it did NOT destroy the association (instead
 4411  * it unlocks it. It will return NON-zero if it either destroyed the
 4412  * association OR the association is already destroyed.
 4413  */
 4414 int
 4415 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location)
 4416 {
 4417         int i;
 4418         struct sctp_association *asoc;
 4419         struct sctp_nets *net, *prev;
 4420         struct sctp_laddr *laddr;
 4421         struct sctp_tmit_chunk *chk;
 4422         struct sctp_asconf_addr *aparam;
 4423         struct sctp_asconf_ack *aack;
 4424         struct sctp_stream_reset_list *liste;
 4425         struct sctp_queued_to_read *sq;
 4426         struct sctp_stream_queue_pending *sp;
 4427         sctp_sharedkey_t *shared_key;
 4428         struct socket *so;
 4429         int ccnt = 0;
 4430         int cnt = 0;
 4431 
 4432         /* first, lets purge the entry from the hash table. */
 4433 
 4434 #ifdef SCTP_LOG_CLOSING
 4435         sctp_log_closing(inp, stcb, 6);
 4436 #endif
 4437         if (stcb->asoc.state == 0) {
 4438 #ifdef SCTP_LOG_CLOSING
 4439                 sctp_log_closing(inp, NULL, 7);
 4440 #endif
 4441                 /* there is no asoc, really TSNH :-0 */
 4442                 return (1);
 4443         }
 4444         /* TEMP CODE */
 4445         if (stcb->freed_from_where == 0) {
 4446                 /* Only record the first place free happened from */
 4447                 stcb->freed_from_where = from_location;
 4448         }
 4449         /* TEMP CODE */
 4450 
 4451         asoc = &stcb->asoc;
 4452         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
 4453             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
 4454                 /* nothing around */
 4455                 so = NULL;
 4456         else
 4457                 so = inp->sctp_socket;
 4458 
 4459         /*
 4460          * We used timer based freeing if a reader or writer is in the way.
 4461          * So we first check if we are actually being called from a timer,
 4462          * if so we abort early if a reader or writer is still in the way.
 4463          */
 4464         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
 4465             (from_inpcbfree == SCTP_NORMAL_PROC)) {
 4466                 /*
 4467                  * is it the timer driving us? if so are the reader/writers
 4468                  * gone?
 4469                  */
 4470                 if (stcb->asoc.refcnt) {
 4471                         /* nope, reader or writer in the way */
 4472                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
 4473                         /* no asoc destroyed */
 4474                         SCTP_TCB_UNLOCK(stcb);
 4475 #ifdef SCTP_LOG_CLOSING
 4476                         sctp_log_closing(inp, stcb, 8);
 4477 #endif
 4478                         return (0);
 4479                 }
 4480         }
 4481         /* now clean up any other timers */
 4482         (void)SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer);
 4483         asoc->hb_timer.self = NULL;
 4484         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
 4485         asoc->dack_timer.self = NULL;
 4486         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
 4487         /*-
 4488          * For stream reset we don't blast this unless
 4489          * it is a str-reset timer, it might be the
 4490          * free-asoc timer which we DON'T want to
 4491          * disturb.
 4492          */
 4493         if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET)
 4494                 asoc->strreset_timer.self = NULL;
 4495         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
 4496         asoc->asconf_timer.self = NULL;
 4497         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
 4498         asoc->autoclose_timer.self = NULL;
 4499         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
 4500         asoc->shut_guard_timer.self = NULL;
 4501         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
 4502         asoc->delayed_event_timer.self = NULL;
 4503         /* Mobility adaptation */
 4504         (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer);
 4505         asoc->delete_prim_timer.self = NULL;
 4506         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
 4507                 (void)SCTP_OS_TIMER_STOP(&net->fr_timer.timer);
 4508                 net->fr_timer.self = NULL;
 4509                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
 4510                 net->rxt_timer.self = NULL;
 4511                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
 4512                 net->pmtu_timer.self = NULL;
 4513         }
 4514         /* Now the read queue needs to be cleaned up (only once) */
 4515         cnt = 0;
 4516         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) {
 4517                 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED;
 4518                 SCTP_INP_READ_LOCK(inp);
 4519                 TAILQ_FOREACH(sq, &inp->read_queue, next) {
 4520                         if (sq->stcb == stcb) {
 4521                                 sq->do_not_ref_stcb = 1;
 4522                                 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
 4523                                 /*
 4524                                  * If there is no end, there never will be
 4525                                  * now.
 4526                                  */
 4527                                 if (sq->end_added == 0) {
 4528                                         /* Held for PD-API clear that. */
 4529                                         sq->pdapi_aborted = 1;
 4530                                         sq->held_length = 0;
 4531                                         if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) {
 4532                                                 /*
 4533                                                  * Need to add a PD-API
 4534                                                  * aborted indication.
 4535                                                  * Setting the control_pdapi
 4536                                                  * assures that it will be
 4537                                                  * added right after this
 4538                                                  * msg.
 4539                                                  */
 4540                                                 uint32_t strseq;
 4541 
 4542                                                 stcb->asoc.control_pdapi = sq;
 4543                                                 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn;
 4544                                                 sctp_notify_partial_delivery_indication(stcb,
 4545                                                     SCTP_PARTIAL_DELIVERY_ABORTED, 1, strseq);
 4546                                                 stcb->asoc.control_pdapi = NULL;
 4547                                         }
 4548                                 }
 4549                                 /* Add an end to wake them */
 4550                                 sq->end_added = 1;
 4551                                 cnt++;
 4552                         }
 4553                 }
 4554                 SCTP_INP_READ_UNLOCK(inp);
 4555                 if (stcb->block_entry) {
 4556                         cnt++;
 4557                         SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET);
 4558                         stcb->block_entry->error = ECONNRESET;
 4559                         stcb->block_entry = NULL;
 4560                 }
 4561         }
 4562         if (stcb->asoc.refcnt) {
 4563                 /*
 4564                  * reader or writer in the way, we have hopefully given him
 4565                  * something to chew on above.
 4566                  */
 4567                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
 4568                 SCTP_TCB_UNLOCK(stcb);
 4569                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
 4570                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
 4571                         /* nothing around */
 4572                         so = NULL;
 4573                 if (so) {
 4574                         /* Wake any reader/writers */
 4575                         sctp_sorwakeup(inp, so);
 4576                         sctp_sowwakeup(inp, so);
 4577                 }
 4578 #ifdef SCTP_LOG_CLOSING
 4579                 sctp_log_closing(inp, stcb, 9);
 4580 #endif
 4581                 /* no asoc destroyed */
 4582                 return (0);
 4583         }
 4584 #ifdef SCTP_LOG_CLOSING
 4585         sctp_log_closing(inp, stcb, 10);
 4586 #endif
 4587         /*
 4588          * When I reach here, no others want to kill the assoc yet.. and I
 4589          * own the lock. Now its possible an abort comes in when I do the
 4590          * lock exchange below to grab all the locks to do the final take
 4591          * out. to prevent this we increment the count, which will start a
 4592          * timer and blow out above thus assuring us that we hold exclusive
 4593          * killing of the asoc. Note that after getting back the TCB lock we
 4594          * will go ahead and increment the counter back up and stop any
 4595          * timer a passing stranger may have started :-S
 4596          */
 4597         if (from_inpcbfree == SCTP_NORMAL_PROC) {
 4598                 atomic_add_int(&stcb->asoc.refcnt, 1);
 4599 
 4600                 SCTP_TCB_UNLOCK(stcb);
 4601 
 4602                 SCTP_ITERATOR_LOCK();
 4603                 SCTP_INP_INFO_WLOCK();
 4604                 SCTP_INP_WLOCK(inp);
 4605                 SCTP_TCB_LOCK(stcb);
 4606         }
 4607         /* Double check the GONE flag */
 4608         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
 4609             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
 4610                 /* nothing around */
 4611                 so = NULL;
 4612 
 4613         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
 4614             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
 4615                 /*
 4616                  * For TCP type we need special handling when we are
 4617                  * connected. We also include the peel'ed off ones to.
 4618                  */
 4619                 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
 4620                         inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
 4621                         inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED;
 4622                         if (so) {
 4623                                 SOCK_LOCK(so);
 4624                                 if (so->so_rcv.sb_cc == 0) {
 4625                                         so->so_state &= ~(SS_ISCONNECTING |
 4626                                             SS_ISDISCONNECTING |
 4627                                             SS_ISCONFIRMING |
 4628                                             SS_ISCONNECTED);
 4629                                 }
 4630                                 SOCK_UNLOCK(so);
 4631                                 socantrcvmore(so);
 4632                                 sctp_sowwakeup(inp, so);
 4633                                 sctp_sorwakeup(inp, so);
 4634                                 SCTP_SOWAKEUP(so);
 4635                         }
 4636                 }
 4637         }
 4638         /*
 4639          * Make it invalid too, that way if its about to run it will abort
 4640          * and return.
 4641          */
 4642         sctp_iterator_asoc_being_freed(inp, stcb);
 4643         /* re-increment the lock */
 4644         if (from_inpcbfree == SCTP_NORMAL_PROC) {
 4645                 atomic_add_int(&stcb->asoc.refcnt, -1);
 4646         }
 4647         asoc->state = 0;
 4648         if (inp->sctp_tcbhash) {
 4649                 LIST_REMOVE(stcb, sctp_tcbhash);
 4650         }
 4651         if (stcb->asoc.in_asocid_hash) {
 4652                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
 4653         }
 4654         /* Now lets remove it from the list of ALL associations in the EP */
 4655         LIST_REMOVE(stcb, sctp_tcblist);
 4656         if (from_inpcbfree == SCTP_NORMAL_PROC) {
 4657                 SCTP_INP_INCR_REF(inp);
 4658                 SCTP_INP_WUNLOCK(inp);
 4659                 SCTP_ITERATOR_UNLOCK();
 4660         }
 4661         /* pull from vtag hash */
 4662         LIST_REMOVE(stcb, sctp_asocs);
 4663         sctp_add_vtag_to_timewait(asoc->my_vtag, inp->sctp_lport, stcb->rport, SCTP_TIME_WAIT);
 4664 
 4665         /*
 4666          * Now restop the timers to be sure - this is paranoia at is finest!
 4667          */
 4668         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
 4669         (void)SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer);
 4670         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
 4671         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
 4672         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
 4673         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
 4674         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
 4675         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
 4676         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
 4677                 (void)SCTP_OS_TIMER_STOP(&net->fr_timer.timer);
 4678                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
 4679                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
 4680         }
 4681 
 4682         asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE;
 4683         prev = NULL;
 4684         /*
 4685          * The chunk lists and such SHOULD be empty but we check them just
 4686          * in case.
 4687          */
 4688         /* anything on the wheel needs to be removed */
 4689         for (i = 0; i < asoc->streamoutcnt; i++) {
 4690                 struct sctp_stream_out *outs;
 4691 
 4692                 outs = &asoc->strmout[i];
 4693                 /* now clean up any chunks here */
 4694                 sp = TAILQ_FIRST(&outs->outqueue);
 4695                 while (sp) {
 4696                         TAILQ_REMOVE(&outs->outqueue, sp, next);
 4697                         if (sp->data) {
 4698                                 sctp_m_freem(sp->data);
 4699                                 sp->data = NULL;
 4700                                 sp->tail_mbuf = NULL;
 4701                         }
 4702                         sctp_free_remote_addr(sp->net);
 4703                         sctp_free_spbufspace(stcb, asoc, sp);
 4704                         if (sp->holds_key_ref)
 4705                                 sctp_auth_key_release(stcb, sp->auth_keyid);
 4706                         /* Free the zone stuff  */
 4707                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_strmoq), sp);
 4708                         SCTP_DECR_STRMOQ_COUNT();
 4709                         /* sa_ignore FREED_MEMORY */
 4710                         sp = TAILQ_FIRST(&outs->outqueue);
 4711                 }
 4712         }
 4713 
 4714         /* sa_ignore FREED_MEMORY */
 4715         while ((liste = TAILQ_FIRST(&asoc->resetHead)) != NULL) {
 4716                 TAILQ_REMOVE(&asoc->resetHead, liste, next_resp);
 4717                 SCTP_FREE(liste, SCTP_M_STRESET);
 4718         }
 4719 
 4720         sq = TAILQ_FIRST(&asoc->pending_reply_queue);
 4721         while (sq) {
 4722                 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
 4723                 if (sq->data) {
 4724                         sctp_m_freem(sq->data);
 4725                         sq->data = NULL;
 4726                 }
 4727                 sctp_free_remote_addr(sq->whoFrom);
 4728                 sq->whoFrom = NULL;
 4729                 sq->stcb = NULL;
 4730                 /* Free the ctl entry */
 4731                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq);
 4732                 SCTP_DECR_READQ_COUNT();
 4733                 /* sa_ignore FREED_MEMORY */
 4734                 sq = TAILQ_FIRST(&asoc->pending_reply_queue);
 4735         }
 4736 
 4737         chk = TAILQ_FIRST(&asoc->free_chunks);
 4738         while (chk) {
 4739                 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next);
 4740                 if (chk->data) {
 4741                         sctp_m_freem(chk->data);
 4742                         chk->data = NULL;
 4743                 }
 4744                 if (chk->holds_key_ref)
 4745                         sctp_auth_key_release(stcb, chk->auth_keyid);
 4746                 ccnt++;
 4747                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
 4748                 SCTP_DECR_CHK_COUNT();
 4749                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1);
 4750                 asoc->free_chunk_cnt--;
 4751                 /* sa_ignore FREED_MEMORY */
 4752                 chk = TAILQ_FIRST(&asoc->free_chunks);
 4753         }
 4754         /* pending send queue SHOULD be empty */
 4755         if (!TAILQ_EMPTY(&asoc->send_queue)) {
 4756                 chk = TAILQ_FIRST(&asoc->send_queue);
 4757                 while (chk) {
 4758                         TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
 4759                         if (chk->data) {
 4760                                 sctp_m_freem(chk->data);
 4761                                 chk->data = NULL;
 4762                         }
 4763                         if (chk->holds_key_ref)
 4764                                 sctp_auth_key_release(stcb, chk->auth_keyid);
 4765                         ccnt++;
 4766                         sctp_free_remote_addr(chk->whoTo);
 4767                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
 4768                         SCTP_DECR_CHK_COUNT();
 4769                         /* sa_ignore FREED_MEMORY */
 4770                         chk = TAILQ_FIRST(&asoc->send_queue);
 4771                 }
 4772         }
 4773 /*
 4774   if(ccnt) {
 4775   printf("Freed %d from send_queue\n", ccnt);
 4776   ccnt = 0;
 4777   }
 4778 */
 4779         /* sent queue SHOULD be empty */
 4780         if (!TAILQ_EMPTY(&asoc->sent_queue)) {
 4781                 chk = TAILQ_FIRST(&asoc->sent_queue);
 4782                 while (chk) {
 4783                         TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
 4784                         if (chk->data) {
 4785                                 sctp_m_freem(chk->data);
 4786                                 chk->data = NULL;
 4787                         }
 4788                         if (chk->holds_key_ref)
 4789                                 sctp_auth_key_release(stcb, chk->auth_keyid);
 4790                         ccnt++;
 4791                         sctp_free_remote_addr(chk->whoTo);
 4792                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
 4793                         SCTP_DECR_CHK_COUNT();
 4794                         /* sa_ignore FREED_MEMORY */
 4795                         chk = TAILQ_FIRST(&asoc->sent_queue);
 4796                 }
 4797         }
 4798 /*
 4799   if(ccnt) {
 4800   printf("Freed %d from sent_queue\n", ccnt);
 4801   ccnt = 0;
 4802   }
 4803 */
 4804         /* control queue MAY not be empty */
 4805         if (!TAILQ_EMPTY(&asoc->control_send_queue)) {
 4806                 chk = TAILQ_FIRST(&asoc->control_send_queue);
 4807                 while (chk) {
 4808                         TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
 4809                         if (chk->data) {
 4810                                 sctp_m_freem(chk->data);
 4811                                 chk->data = NULL;
 4812                         }
 4813                         if (chk->holds_key_ref)
 4814                                 sctp_auth_key_release(stcb, chk->auth_keyid);
 4815                         ccnt++;
 4816                         sctp_free_remote_addr(chk->whoTo);
 4817                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
 4818                         SCTP_DECR_CHK_COUNT();
 4819                         /* sa_ignore FREED_MEMORY */
 4820                         chk = TAILQ_FIRST(&asoc->control_send_queue);
 4821                 }
 4822         }
 4823 /*
 4824   if(ccnt) {
 4825   printf("Freed %d from ctrl_queue\n", ccnt);
 4826   ccnt = 0;
 4827   }
 4828 */
 4829 
 4830         /* ASCONF queue MAY not be empty */
 4831         if (!TAILQ_EMPTY(&asoc->asconf_send_queue)) {
 4832                 chk = TAILQ_FIRST(&asoc->asconf_send_queue);
 4833                 while (chk) {
 4834                         TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
 4835                         if (chk->data) {
 4836                                 sctp_m_freem(chk->data);
 4837                                 chk->data = NULL;
 4838                         }
 4839                         if (chk->holds_key_ref)
 4840                                 sctp_auth_key_release(stcb, chk->auth_keyid);
 4841                         ccnt++;
 4842                         sctp_free_remote_addr(chk->whoTo);
 4843                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
 4844                         SCTP_DECR_CHK_COUNT();
 4845                         /* sa_ignore FREED_MEMORY */
 4846                         chk = TAILQ_FIRST(&asoc->asconf_send_queue);
 4847                 }
 4848         }
 4849 /*
 4850   if(ccnt) {
 4851   printf("Freed %d from asconf_queue\n", ccnt);
 4852   ccnt = 0;
 4853   }
 4854 */
 4855         if (!TAILQ_EMPTY(&asoc->reasmqueue)) {
 4856                 chk = TAILQ_FIRST(&asoc->reasmqueue);
 4857                 while (chk) {
 4858                         TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
 4859                         if (chk->data) {
 4860                                 sctp_m_freem(chk->data);
 4861                                 chk->data = NULL;
 4862                         }
 4863                         if (chk->holds_key_ref)
 4864                                 sctp_auth_key_release(stcb, chk->auth_keyid);
 4865                         sctp_free_remote_addr(chk->whoTo);
 4866                         ccnt++;
 4867                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
 4868                         SCTP_DECR_CHK_COUNT();
 4869                         /* sa_ignore FREED_MEMORY */
 4870                         chk = TAILQ_FIRST(&asoc->reasmqueue);
 4871                 }
 4872         }
 4873 /*
 4874   if(ccnt) {
 4875   printf("Freed %d from reasm_queue\n", ccnt);
 4876   ccnt = 0;
 4877   }
 4878 */
 4879         if (asoc->mapping_array) {
 4880                 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
 4881                 asoc->mapping_array = NULL;
 4882         }
 4883         if (asoc->nr_mapping_array) {
 4884                 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
 4885                 asoc->nr_mapping_array = NULL;
 4886         }
 4887         /* the stream outs */
 4888         if (asoc->strmout) {
 4889                 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
 4890                 asoc->strmout = NULL;
 4891         }
 4892         asoc->streamoutcnt = 0;
 4893         if (asoc->strmin) {
 4894                 struct sctp_queued_to_read *ctl;
 4895 
 4896                 for (i = 0; i < asoc->streamincnt; i++) {
 4897                         if (!TAILQ_EMPTY(&asoc->strmin[i].inqueue)) {
 4898                                 /* We have somethings on the streamin queue */
 4899                                 ctl = TAILQ_FIRST(&asoc->strmin[i].inqueue);
 4900                                 while (ctl) {
 4901                                         TAILQ_REMOVE(&asoc->strmin[i].inqueue,
 4902                                             ctl, next);
 4903                                         sctp_free_remote_addr(ctl->whoFrom);
 4904                                         if (ctl->data) {
 4905                                                 sctp_m_freem(ctl->data);
 4906                                                 ctl->data = NULL;
 4907                                         }
 4908                                         /*
 4909                                          * We don't free the address here
 4910                                          * since all the net's were freed
 4911                                          * above.
 4912                                          */
 4913                                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl);
 4914                                         SCTP_DECR_READQ_COUNT();
 4915                                         ctl = TAILQ_FIRST(&asoc->strmin[i].inqueue);
 4916                                 }
 4917                         }
 4918                 }
 4919                 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
 4920                 asoc->strmin = NULL;
 4921         }
 4922         asoc->streamincnt = 0;
 4923         while (!TAILQ_EMPTY(&asoc->nets)) {
 4924                 /* sa_ignore FREED_MEMORY */
 4925                 net = TAILQ_FIRST(&asoc->nets);
 4926                 /* pull from list */
 4927                 if ((SCTP_BASE_INFO(ipi_count_raddr) == 0) || (prev == net)) {
 4928 #ifdef INVARIANTS
 4929                         panic("no net's left alloc'ed, or list points to itself");
 4930 #endif
 4931                         break;
 4932                 }
 4933                 prev = net;
 4934                 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
 4935                 sctp_free_remote_addr(net);
 4936         }
 4937 
 4938         while (!LIST_EMPTY(&asoc->sctp_restricted_addrs)) {
 4939                 /* sa_ignore FREED_MEMORY */
 4940                 laddr = LIST_FIRST(&asoc->sctp_restricted_addrs);
 4941                 sctp_remove_laddr(laddr);
 4942         }
 4943 
 4944         /* pending asconf (address) parameters */
 4945         while (!TAILQ_EMPTY(&asoc->asconf_queue)) {
 4946                 /* sa_ignore FREED_MEMORY */
 4947                 aparam = TAILQ_FIRST(&asoc->asconf_queue);
 4948                 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
 4949                 SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
 4950         }
 4951         while (!TAILQ_EMPTY(&asoc->asconf_ack_sent)) {
 4952                 /* sa_ignore FREED_MEMORY */
 4953                 aack = TAILQ_FIRST(&asoc->asconf_ack_sent);
 4954                 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next);
 4955                 if (aack->data != NULL) {
 4956                         sctp_m_freem(aack->data);
 4957                 }
 4958                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack);
 4959         }
 4960         /* clean up auth stuff */
 4961         if (asoc->local_hmacs)
 4962                 sctp_free_hmaclist(asoc->local_hmacs);
 4963         if (asoc->peer_hmacs)
 4964                 sctp_free_hmaclist(asoc->peer_hmacs);
 4965 
 4966         if (asoc->local_auth_chunks)
 4967                 sctp_free_chunklist(asoc->local_auth_chunks);
 4968         if (asoc->peer_auth_chunks)
 4969                 sctp_free_chunklist(asoc->peer_auth_chunks);
 4970 
 4971         sctp_free_authinfo(&asoc->authinfo);
 4972 
 4973         shared_key = LIST_FIRST(&asoc->shared_keys);
 4974         while (shared_key) {
 4975                 LIST_REMOVE(shared_key, next);
 4976                 sctp_free_sharedkey(shared_key);
 4977                 /* sa_ignore FREED_MEMORY */
 4978                 shared_key = LIST_FIRST(&asoc->shared_keys);
 4979         }
 4980 
 4981         /* Insert new items here :> */
 4982 
 4983         /* Get rid of LOCK */
 4984         SCTP_TCB_LOCK_DESTROY(stcb);
 4985         SCTP_TCB_SEND_LOCK_DESTROY(stcb);
 4986         if (from_inpcbfree == SCTP_NORMAL_PROC) {
 4987                 SCTP_INP_INFO_WUNLOCK();
 4988                 SCTP_INP_RLOCK(inp);
 4989         }
 4990 #ifdef SCTP_TRACK_FREED_ASOCS
 4991         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
 4992                 /* now clean up the tasoc itself */
 4993                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
 4994                 SCTP_DECR_ASOC_COUNT();
 4995         } else {
 4996                 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist);
 4997         }
 4998 #else
 4999         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
 5000         SCTP_DECR_ASOC_COUNT();
 5001 #endif
 5002         if (from_inpcbfree == SCTP_NORMAL_PROC) {
 5003                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
 5004                         /*
 5005                          * If its NOT the inp_free calling us AND sctp_close
 5006                          * as been called, we call back...
 5007                          */
 5008                         SCTP_INP_RUNLOCK(inp);
 5009                         /*
 5010                          * This will start the kill timer (if we are the
 5011                          * lastone) since we hold an increment yet. But this
 5012                          * is the only safe way to do this since otherwise
 5013                          * if the socket closes at the same time we are here
 5014                          * we might collide in the cleanup.
 5015                          */
 5016                         sctp_inpcb_free(inp,
 5017                             SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE,
 5018                             SCTP_CALLED_DIRECTLY_NOCMPSET);
 5019                         SCTP_INP_DECR_REF(inp);
 5020                         goto out_of;
 5021                 } else {
 5022                         /* The socket is still open. */
 5023                         SCTP_INP_DECR_REF(inp);
 5024                 }
 5025         }
 5026         if (from_inpcbfree == SCTP_NORMAL_PROC) {
 5027                 SCTP_INP_RUNLOCK(inp);
 5028         }
 5029 out_of:
 5030         /* destroyed the asoc */
 5031 #ifdef SCTP_LOG_CLOSING
 5032         sctp_log_closing(inp, NULL, 11);
 5033 #endif
 5034         return (1);
 5035 }
 5036 
 5037 
 5038 
 5039 /*
 5040  * determine if a destination is "reachable" based upon the addresses bound
 5041  * to the current endpoint (e.g. only v4 or v6 currently bound)
 5042  */
 5043 /*
 5044  * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use
 5045  * assoc level v4/v6 flags, as the assoc *may* not have the same address
 5046  * types bound as its endpoint
 5047  */
 5048 int
 5049 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
 5050 {
 5051         struct sctp_inpcb *inp;
 5052         int answer;
 5053 
 5054         /*
 5055          * No locks here, the TCB, in all cases is already locked and an
 5056          * assoc is up. There is either a INP lock by the caller applied (in
 5057          * asconf case when deleting an address) or NOT in the HB case,
 5058          * however if HB then the INP increment is up and the INP will not
 5059          * be removed (on top of the fact that we have a TCB lock). So we
 5060          * only want to read the sctp_flags, which is either bound-all or
 5061          * not.. no protection needed since once an assoc is up you can't be
 5062          * changing your binding.
 5063          */
 5064         inp = stcb->sctp_ep;
 5065         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
 5066                 /* if bound all, destination is not restricted */
 5067                 /*
 5068                  * RRS: Question during lock work: Is this correct? If you
 5069                  * are bound-all you still might need to obey the V4--V6
 5070                  * flags??? IMO this bound-all stuff needs to be removed!
 5071                  */
 5072                 return (1);
 5073         }
 5074         /* NOTE: all "scope" checks are done when local addresses are added */
 5075         if (destaddr->sa_family == AF_INET6) {
 5076                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
 5077         } else if (destaddr->sa_family == AF_INET) {
 5078                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
 5079         } else {
 5080                 /* invalid family, so it's unreachable */
 5081                 answer = 0;
 5082         }
 5083         return (answer);
 5084 }
 5085 
 5086 /*
 5087  * update the inp_vflags on an endpoint
 5088  */
 5089 static void
 5090 sctp_update_ep_vflag(struct sctp_inpcb *inp)
 5091 {
 5092         struct sctp_laddr *laddr;
 5093 
 5094         /* first clear the flag */
 5095         inp->ip_inp.inp.inp_vflag = 0;
 5096         /* set the flag based on addresses on the ep list */
 5097         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
 5098                 if (laddr->ifa == NULL) {
 5099                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
 5100                             __FUNCTION__);
 5101                         continue;
 5102                 }
 5103                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
 5104                         continue;
 5105                 }
 5106                 if (laddr->ifa->address.sa.sa_family == AF_INET6) {
 5107                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
 5108                 } else if (laddr->ifa->address.sa.sa_family == AF_INET) {
 5109                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
 5110                 }
 5111         }
 5112 }
 5113 
 5114 /*
 5115  * Add the address to the endpoint local address list There is nothing to be
 5116  * done if we are bound to all addresses
 5117  */
 5118 void
 5119 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action)
 5120 {
 5121         struct sctp_laddr *laddr;
 5122         int fnd, error = 0;
 5123 
 5124         fnd = 0;
 5125 
 5126         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
 5127                 /* You are already bound to all. You have it already */
 5128                 return;
 5129         }
 5130         if (ifa->address.sa.sa_family == AF_INET6) {
 5131                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
 5132                         /* Can't bind a non-useable addr. */
 5133                         return;
 5134                 }
 5135         }
 5136         /* first, is it already present? */
 5137         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
 5138                 if (laddr->ifa == ifa) {
 5139                         fnd = 1;
 5140                         break;
 5141                 }
 5142         }
 5143 
 5144         if (fnd == 0) {
 5145                 /* Not in the ep list */
 5146                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action);
 5147                 if (error != 0)
 5148                         return;
 5149                 inp->laddr_count++;
 5150                 /* update inp_vflag flags */
 5151                 if (ifa->address.sa.sa_family == AF_INET6) {
 5152                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
 5153                 } else if (ifa->address.sa.sa_family == AF_INET) {
 5154                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
 5155                 }
 5156         }
 5157         return;
 5158 }
 5159 
 5160 
 5161 /*
 5162  * select a new (hopefully reachable) destination net (should only be used
 5163  * when we deleted an ep addr that is the only usable source address to reach
 5164  * the destination net)
 5165  */
 5166 static void
 5167 sctp_select_primary_destination(struct sctp_tcb *stcb)
 5168 {
 5169         struct sctp_nets *net;
 5170 
 5171         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 5172                 /* for now, we'll just pick the first reachable one we find */
 5173                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
 5174                         continue;
 5175                 if (sctp_destination_is_reachable(stcb,
 5176                     (struct sockaddr *)&net->ro._l_addr)) {
 5177                         /* found a reachable destination */
 5178                         stcb->asoc.primary_destination = net;
 5179                 }
 5180         }
 5181         /* I can't there from here! ...we're gonna die shortly... */
 5182 }
 5183 
 5184 
 5185 /*
 5186  * Delete the address from the endpoint local address list There is nothing
 5187  * to be done if we are bound to all addresses
 5188  */
 5189 void
 5190 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
 5191 {
 5192         struct sctp_laddr *laddr;
 5193         int fnd;
 5194 
 5195         fnd = 0;
 5196         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
 5197                 /* You are already bound to all. You have it already */
 5198                 return;
 5199         }
 5200         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
 5201                 if (laddr->ifa == ifa) {
 5202                         fnd = 1;
 5203                         break;
 5204                 }
 5205         }
 5206         if (fnd && (inp->laddr_count < 2)) {
 5207                 /* can't delete unless there are at LEAST 2 addresses */
 5208                 return;
 5209         }
 5210         if (fnd) {
 5211                 /*
 5212                  * clean up any use of this address go through our
 5213                  * associations and clear any last_used_address that match
 5214                  * this one for each assoc, see if a new primary_destination
 5215                  * is needed
 5216                  */
 5217                 struct sctp_tcb *stcb;
 5218 
 5219                 /* clean up "next_addr_touse" */
 5220                 if (inp->next_addr_touse == laddr)
 5221                         /* delete this address */
 5222                         inp->next_addr_touse = NULL;
 5223 
 5224                 /* clean up "last_used_address" */
 5225                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
 5226                         struct sctp_nets *net;
 5227 
 5228                         SCTP_TCB_LOCK(stcb);
 5229                         if (stcb->asoc.last_used_address == laddr)
 5230                                 /* delete this address */
 5231                                 stcb->asoc.last_used_address = NULL;
 5232                         /*
 5233                          * Now spin through all the nets and purge any ref
 5234                          * to laddr
 5235                          */
 5236                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 5237                                 if (net->ro._s_addr &&
 5238                                     (net->ro._s_addr->ifa == laddr->ifa)) {
 5239                                         /* Yep, purge src address selected */
 5240                                         sctp_rtentry_t *rt;
 5241 
 5242                                         /* delete this address if cached */
 5243                                         rt = net->ro.ro_rt;
 5244                                         if (rt != NULL) {
 5245                                                 RTFREE(rt);
 5246                                                 net->ro.ro_rt = NULL;
 5247                                         }
 5248                                         sctp_free_ifa(net->ro._s_addr);
 5249                                         net->ro._s_addr = NULL;
 5250                                         net->src_addr_selected = 0;
 5251                                 }
 5252                         }
 5253                         SCTP_TCB_UNLOCK(stcb);
 5254                 }               /* for each tcb */
 5255                 /* remove it from the ep list */
 5256                 sctp_remove_laddr(laddr);
 5257                 inp->laddr_count--;
 5258                 /* update inp_vflag flags */
 5259                 sctp_update_ep_vflag(inp);
 5260         }
 5261         return;
 5262 }
 5263 
 5264 /*
 5265  * Add the address to the TCB local address restricted list.
 5266  * This is a "pending" address list (eg. addresses waiting for an
 5267  * ASCONF-ACK response) and cannot be used as a valid source address.
 5268  */
 5269 void
 5270 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
 5271 {
 5272         struct sctp_inpcb *inp;
 5273         struct sctp_laddr *laddr;
 5274         struct sctpladdr *list;
 5275 
 5276         /*
 5277          * Assumes TCB is locked.. and possibly the INP. May need to
 5278          * confirm/fix that if we need it and is not the case.
 5279          */
 5280         list = &stcb->asoc.sctp_restricted_addrs;
 5281 
 5282         inp = stcb->sctp_ep;
 5283         if (ifa->address.sa.sa_family == AF_INET6) {
 5284                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
 5285                         /* Can't bind a non-existent addr. */
 5286                         return;
 5287                 }
 5288         }
 5289         /* does the address already exist? */
 5290         LIST_FOREACH(laddr, list, sctp_nxt_addr) {
 5291                 if (laddr->ifa == ifa) {
 5292                         return;
 5293                 }
 5294         }
 5295 
 5296         /* add to the list */
 5297         (void)sctp_insert_laddr(list, ifa, 0);
 5298         return;
 5299 }
 5300 
 5301 /*
 5302  * insert an laddr entry with the given ifa for the desired list
 5303  */
 5304 int
 5305 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act)
 5306 {
 5307         struct sctp_laddr *laddr;
 5308 
 5309         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
 5310         if (laddr == NULL) {
 5311                 /* out of memory? */
 5312                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
 5313                 return (EINVAL);
 5314         }
 5315         SCTP_INCR_LADDR_COUNT();
 5316         bzero(laddr, sizeof(*laddr));
 5317         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
 5318         laddr->ifa = ifa;
 5319         laddr->action = act;
 5320         atomic_add_int(&ifa->refcount, 1);
 5321         /* insert it */
 5322         LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
 5323 
 5324         return (0);
 5325 }
 5326 
 5327 /*
 5328  * Remove an laddr entry from the local address list (on an assoc)
 5329  */
 5330 void
 5331 sctp_remove_laddr(struct sctp_laddr *laddr)
 5332 {
 5333 
 5334         /* remove from the list */
 5335         LIST_REMOVE(laddr, sctp_nxt_addr);
 5336         sctp_free_ifa(laddr->ifa);
 5337         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr);
 5338         SCTP_DECR_LADDR_COUNT();
 5339 }
 5340 
 5341 /*
 5342  * Remove a local address from the TCB local address restricted list
 5343  */
 5344 void
 5345 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
 5346 {
 5347         struct sctp_inpcb *inp;
 5348         struct sctp_laddr *laddr;
 5349 
 5350         /*
 5351          * This is called by asconf work. It is assumed that a) The TCB is
 5352          * locked and b) The INP is locked. This is true in as much as I can
 5353          * trace through the entry asconf code where I did these locks.
 5354          * Again, the ASCONF code is a bit different in that it does lock
 5355          * the INP during its work often times. This must be since we don't
 5356          * want other proc's looking up things while what they are looking
 5357          * up is changing :-D
 5358          */
 5359 
 5360         inp = stcb->sctp_ep;
 5361         /* if subset bound and don't allow ASCONF's, can't delete last */
 5362         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
 5363             sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
 5364                 if (stcb->sctp_ep->laddr_count < 2) {
 5365                         /* can't delete last address */
 5366                         return;
 5367                 }
 5368         }
 5369         LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
 5370                 /* remove the address if it exists */
 5371                 if (laddr->ifa == NULL)
 5372                         continue;
 5373                 if (laddr->ifa == ifa) {
 5374                         sctp_remove_laddr(laddr);
 5375                         return;
 5376                 }
 5377         }
 5378 
 5379         /* address not found! */
 5380         return;
 5381 }
 5382 
 5383 /*
 5384  * Temporarily remove for __APPLE__ until we use the Tiger equivalents
 5385  */
 5386 /* sysctl */
 5387 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
 5388 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
 5389 
 5390 void
 5391 sctp_pcb_init()
 5392 {
 5393         /*
 5394          * SCTP initialization for the PCB structures should be called by
 5395          * the sctp_init() funciton.
 5396          */
 5397         int i;
 5398         struct timeval tv;
 5399 
 5400         if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) {
 5401                 /* error I was called twice */
 5402                 return;
 5403         }
 5404         SCTP_BASE_VAR(sctp_pcb_initialized) = 1;
 5405 
 5406 #if defined(SCTP_LOCAL_TRACE_BUF)
 5407         bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log));
 5408 #endif
 5409         (void)SCTP_GETTIME_TIMEVAL(&tv);
 5410         SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t) tv.tv_sec;
 5411         SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t) tv.tv_usec;
 5412         /* init the empty list of (All) Endpoints */
 5413         LIST_INIT(&SCTP_BASE_INFO(listhead));
 5414 
 5415         /* init the iterator head */
 5416         TAILQ_INIT(&SCTP_BASE_INFO(iteratorhead));
 5417 
 5418         /* init the hash table of endpoints */
 5419         TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize));
 5420         TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize));
 5421         TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale));
 5422         SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31),
 5423             &SCTP_BASE_INFO(hashasocmark));
 5424         SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
 5425             &SCTP_BASE_INFO(hashmark));
 5426         SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
 5427             &SCTP_BASE_INFO(hashtcpmark));
 5428         SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize);
 5429 
 5430 
 5431         SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH,
 5432             &SCTP_BASE_INFO(hashvrfmark));
 5433 
 5434         SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE,
 5435             &SCTP_BASE_INFO(vrf_ifn_hashmark));
 5436         /* init the zones */
 5437         /*
 5438          * FIX ME: Should check for NULL returns, but if it does fail we are
 5439          * doomed to panic anyways... add later maybe.
 5440          */
 5441         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep",
 5442             sizeof(struct sctp_inpcb), maxsockets);
 5443 
 5444         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc",
 5445             sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
 5446 
 5447         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr",
 5448             sizeof(struct sctp_laddr),
 5449             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
 5450 
 5451         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr",
 5452             sizeof(struct sctp_nets),
 5453             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
 5454 
 5455         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk",
 5456             sizeof(struct sctp_tmit_chunk),
 5457             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
 5458 
 5459         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq",
 5460             sizeof(struct sctp_queued_to_read),
 5461             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
 5462 
 5463         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out",
 5464             sizeof(struct sctp_stream_queue_pending),
 5465             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
 5466 
 5467         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf",
 5468             sizeof(struct sctp_asconf),
 5469             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
 5470 
 5471         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack",
 5472             sizeof(struct sctp_asconf_ack),
 5473             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
 5474 
 5475 
 5476         /* Master Lock INIT for info structure */
 5477         SCTP_INP_INFO_LOCK_INIT();
 5478         SCTP_STATLOG_INIT_LOCK();
 5479         SCTP_ITERATOR_LOCK_INIT();
 5480 
 5481         SCTP_IPI_COUNT_INIT();
 5482         SCTP_IPI_ADDR_INIT();
 5483         SCTP_IPI_ITERATOR_WQ_INIT();
 5484 #ifdef SCTP_PACKET_LOGGING
 5485         SCTP_IP_PKTLOG_INIT();
 5486 #endif
 5487         LIST_INIT(&SCTP_BASE_INFO(addr_wq));
 5488 
 5489         /* not sure if we need all the counts */
 5490         SCTP_BASE_INFO(ipi_count_ep) = 0;
 5491         /* assoc/tcb zone info */
 5492         SCTP_BASE_INFO(ipi_count_asoc) = 0;
 5493         /* local addrlist zone info */
 5494         SCTP_BASE_INFO(ipi_count_laddr) = 0;
 5495         /* remote addrlist zone info */
 5496         SCTP_BASE_INFO(ipi_count_raddr) = 0;
 5497         /* chunk info */
 5498         SCTP_BASE_INFO(ipi_count_chunk) = 0;
 5499 
 5500         /* socket queue zone info */
 5501         SCTP_BASE_INFO(ipi_count_readq) = 0;
 5502 
 5503         /* stream out queue cont */
 5504         SCTP_BASE_INFO(ipi_count_strmoq) = 0;
 5505 
 5506         SCTP_BASE_INFO(ipi_free_strmoq) = 0;
 5507         SCTP_BASE_INFO(ipi_free_chunks) = 0;
 5508 
 5509         SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer));
 5510 
 5511         /* Init the TIMEWAIT list */
 5512         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
 5513                 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]);
 5514         }
 5515 
 5516 #if defined(SCTP_USE_THREAD_BASED_ITERATOR)
 5517         SCTP_BASE_INFO(iterator_running) = 0;
 5518         SCTP_BASE_INFO(threads_must_exit) = 0;
 5519         sctp_startup_iterator();
 5520 #endif
 5521 
 5522         /*
 5523          * INIT the default VRF which for BSD is the only one, other O/S's
 5524          * may have more. But initially they must start with one and then
 5525          * add the VRF's as addresses are added.
 5526          */
 5527         sctp_init_vrf_list(SCTP_DEFAULT_VRF);
 5528 
 5529 }
 5530 
 5531 /*
 5532  * Assumes that the SCTP_BASE_INFO() lock is NOT held.
 5533  */
 5534 void
 5535 sctp_pcb_finish(void)
 5536 {
 5537         struct sctp_vrflist *vrf_bucket;
 5538         struct sctp_vrf *vrf;
 5539         struct sctp_ifn *ifn;
 5540         struct sctp_ifa *ifa;
 5541         struct sctpvtaghead *chain;
 5542         struct sctp_tagblock *twait_block, *prev_twait_block;
 5543         int i;
 5544 
 5545         /*
 5546          * free the vrf/ifn/ifa lists and hashes (be sure address monitor is
 5547          * destroyed first).
 5548          */
 5549         vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))];
 5550         vrf = LIST_FIRST(vrf_bucket);
 5551         while (vrf) {
 5552                 ifn = LIST_FIRST(&vrf->ifnlist);
 5553                 while (ifn) {
 5554                         ifa = LIST_FIRST(&ifn->ifalist);
 5555                         while (ifa) {
 5556                                 /* free the ifa */
 5557                                 LIST_REMOVE(ifa, next_bucket);
 5558                                 LIST_REMOVE(ifa, next_ifa);
 5559                                 SCTP_FREE(ifa, SCTP_M_IFA);
 5560                                 ifa = LIST_FIRST(&ifn->ifalist);
 5561                         }
 5562                         /* free the ifn */
 5563                         LIST_REMOVE(ifn, next_bucket);
 5564                         LIST_REMOVE(ifn, next_ifn);
 5565                         SCTP_FREE(ifn, SCTP_M_IFN);
 5566                         ifn = LIST_FIRST(&vrf->ifnlist);
 5567                 }
 5568                 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
 5569                 /* free the vrf */
 5570                 LIST_REMOVE(vrf, next_vrf);
 5571                 SCTP_FREE(vrf, SCTP_M_VRF);
 5572                 vrf = LIST_FIRST(vrf_bucket);
 5573         }
 5574         /* free the vrf hashes */
 5575         SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark));
 5576         SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark));
 5577 
 5578         /*
 5579          * free the TIMEWAIT list elements malloc'd in the function
 5580          * sctp_add_vtag_to_timewait()...
 5581          */
 5582         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
 5583                 chain = &SCTP_BASE_INFO(vtag_timewait)[i];
 5584                 if (!LIST_EMPTY(chain)) {
 5585                         prev_twait_block = NULL;
 5586                         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
 5587                                 if (prev_twait_block) {
 5588                                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
 5589                                 }
 5590                                 prev_twait_block = twait_block;
 5591                         }
 5592                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
 5593                 }
 5594         }
 5595 
 5596         /* free the locks and mutexes */
 5597 #ifdef SCTP_PACKET_LOGGING
 5598         SCTP_IP_PKTLOG_DESTROY();
 5599 
 5600 #endif
 5601         SCTP_IPI_ITERATOR_WQ_DESTROY();
 5602         SCTP_IPI_ADDR_DESTROY();
 5603         SCTP_ITERATOR_LOCK_DESTROY();
 5604         SCTP_STATLOG_DESTROY();
 5605         SCTP_INP_INFO_LOCK_DESTROY();
 5606 
 5607         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep));
 5608         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc));
 5609         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr));
 5610         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net));
 5611         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk));
 5612         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq));
 5613         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq));
 5614         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf));
 5615         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack));
 5616         /* Get rid of other stuff to */
 5617         if (SCTP_BASE_INFO(sctp_asochash) != NULL)
 5618                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark));
 5619         if (SCTP_BASE_INFO(sctp_ephash) != NULL)
 5620                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark));
 5621         if (SCTP_BASE_INFO(sctp_tcpephash) != NULL)
 5622                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark));
 5623 
 5624 }
 5625 
 5626 
 5627 int
 5628 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
 5629     int iphlen, int offset, int limit, struct sctphdr *sh,
 5630     struct sockaddr *altsa)
 5631 {
 5632         /*
 5633          * grub through the INIT pulling addresses and loading them to the
 5634          * nets structure in the asoc. The from address in the mbuf should
 5635          * also be loaded (if it is not already). This routine can be called
 5636          * with either INIT or INIT-ACK's as long as the m points to the IP
 5637          * packet and the offset points to the beginning of the parameters.
 5638          */
 5639         struct sctp_inpcb *inp, *l_inp;
 5640         struct sctp_nets *net, *net_tmp;
 5641         struct ip *iph;
 5642         struct sctp_paramhdr *phdr, parm_buf;
 5643         struct sctp_tcb *stcb_tmp;
 5644         uint16_t ptype, plen;
 5645         struct sockaddr *sa;
 5646         struct sockaddr_storage dest_store;
 5647         struct sockaddr *local_sa = (struct sockaddr *)&dest_store;
 5648         struct sockaddr_in sin;
 5649         struct sockaddr_in6 sin6;
 5650         uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
 5651         struct sctp_auth_random *p_random = NULL;
 5652         uint16_t random_len = 0;
 5653         uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE];
 5654         struct sctp_auth_hmac_algo *hmacs = NULL;
 5655         uint16_t hmacs_len = 0;
 5656         uint8_t saw_asconf = 0;
 5657         uint8_t saw_asconf_ack = 0;
 5658         uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE];
 5659         struct sctp_auth_chunk_list *chunks = NULL;
 5660         uint16_t num_chunks = 0;
 5661         sctp_key_t *new_key;
 5662         uint32_t keylen;
 5663         int got_random = 0, got_hmacs = 0, got_chklist = 0;
 5664 
 5665         /* First get the destination address setup too. */
 5666         memset(&sin, 0, sizeof(sin));
 5667         memset(&sin6, 0, sizeof(sin6));
 5668 
 5669         sin.sin_family = AF_INET;
 5670         sin.sin_len = sizeof(sin);
 5671         sin.sin_port = stcb->rport;
 5672 
 5673         sin6.sin6_family = AF_INET6;
 5674         sin6.sin6_len = sizeof(struct sockaddr_in6);
 5675         sin6.sin6_port = stcb->rport;
 5676         if (altsa == NULL) {
 5677                 iph = mtod(m, struct ip *);
 5678                 switch (iph->ip_v) {
 5679                 case IPVERSION:
 5680                         {
 5681                                 /* its IPv4 */
 5682                                 struct sockaddr_in *sin_2;
 5683 
 5684                                 sin_2 = (struct sockaddr_in *)(local_sa);
 5685                                 memset(sin_2, 0, sizeof(sin));
 5686                                 sin_2->sin_family = AF_INET;
 5687                                 sin_2->sin_len = sizeof(sin);
 5688                                 sin_2->sin_port = sh->dest_port;
 5689                                 sin_2->sin_addr.s_addr = iph->ip_dst.s_addr;
 5690                                 sin.sin_addr = iph->ip_src;
 5691                                 sa = (struct sockaddr *)&sin;
 5692                                 break;
 5693                         }
 5694 #ifdef INET6
 5695                 case IPV6_VERSION >> 4:
 5696                         {
 5697                                 /* its IPv6 */
 5698                                 struct ip6_hdr *ip6;
 5699                                 struct sockaddr_in6 *sin6_2;
 5700 
 5701                                 ip6 = mtod(m, struct ip6_hdr *);
 5702                                 sin6_2 = (struct sockaddr_in6 *)(local_sa);
 5703                                 memset(sin6_2, 0, sizeof(sin6));
 5704                                 sin6_2->sin6_family = AF_INET6;
 5705                                 sin6_2->sin6_len = sizeof(struct sockaddr_in6);
 5706                                 sin6_2->sin6_port = sh->dest_port;
 5707                                 sin6.sin6_addr = ip6->ip6_src;
 5708                                 sa = (struct sockaddr *)&sin6;
 5709                                 break;
 5710                         }
 5711 #endif
 5712                 default:
 5713                         sa = NULL;
 5714                         break;
 5715                 }
 5716         } else {
 5717                 /*
 5718                  * For cookies we use the src address NOT from the packet
 5719                  * but from the original INIT
 5720                  */
 5721                 sa = altsa;
 5722         }
 5723         /* Turn off ECN until we get through all params */
 5724         stcb->asoc.ecn_allowed = 0;
 5725         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 5726                 /* mark all addresses that we have currently on the list */
 5727                 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
 5728         }
 5729         /* does the source address already exist? if so skip it */
 5730         l_inp = inp = stcb->sctp_ep;
 5731 
 5732         atomic_add_int(&stcb->asoc.refcnt, 1);
 5733         stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, local_sa, stcb);
 5734         atomic_add_int(&stcb->asoc.refcnt, -1);
 5735 
 5736         if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
 5737                 /* we must add the source address */
 5738                 /* no scope set here since we have a tcb already. */
 5739                 if ((sa->sa_family == AF_INET) &&
 5740                     (stcb->asoc.ipv4_addr_legal)) {
 5741                         if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) {
 5742                                 return (-1);
 5743                         }
 5744                 } else if ((sa->sa_family == AF_INET6) &&
 5745                     (stcb->asoc.ipv6_addr_legal)) {
 5746                         if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
 5747                                 return (-2);
 5748                         }
 5749                 }
 5750         } else {
 5751                 if (net_tmp != NULL && stcb_tmp == stcb) {
 5752                         net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
 5753                 } else if (stcb_tmp != stcb) {
 5754                         /* It belongs to another association? */
 5755                         if (stcb_tmp)
 5756                                 SCTP_TCB_UNLOCK(stcb_tmp);
 5757                         return (-3);
 5758                 }
 5759         }
 5760         if (stcb->asoc.state == 0) {
 5761                 /* the assoc was freed? */
 5762                 return (-4);
 5763         }
 5764         /*
 5765          * peer must explicitly turn this on. This may have been initialized
 5766          * to be "on" in order to allow local addr changes while INIT's are
 5767          * in flight.
 5768          */
 5769         stcb->asoc.peer_supports_asconf = 0;
 5770         /* now we must go through each of the params. */
 5771         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
 5772         while (phdr) {
 5773                 ptype = ntohs(phdr->param_type);
 5774                 plen = ntohs(phdr->param_length);
 5775                 /*
 5776                  * printf("ptype => %0x, plen => %d\n", (uint32_t)ptype,
 5777                  * (int)plen);
 5778                  */
 5779                 if (offset + plen > limit) {
 5780                         break;
 5781                 }
 5782                 if (plen == 0) {
 5783                         break;
 5784                 }
 5785                 if (ptype == SCTP_IPV4_ADDRESS) {
 5786                         if (stcb->asoc.ipv4_addr_legal) {
 5787                                 struct sctp_ipv4addr_param *p4, p4_buf;
 5788 
 5789                                 /* ok get the v4 address and check/add */
 5790                                 phdr = sctp_get_next_param(m, offset,
 5791                                     (struct sctp_paramhdr *)&p4_buf, sizeof(p4_buf));
 5792                                 if (plen != sizeof(struct sctp_ipv4addr_param) ||
 5793                                     phdr == NULL) {
 5794                                         return (-5);
 5795                                 }
 5796                                 p4 = (struct sctp_ipv4addr_param *)phdr;
 5797                                 sin.sin_addr.s_addr = p4->addr;
 5798                                 if (IN_MULTICAST(sin.sin_addr.s_addr)) {
 5799                                         /* Skip multi-cast addresses */
 5800                                         goto next_param;
 5801                                 }
 5802                                 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) ||
 5803                                     (sin.sin_addr.s_addr == INADDR_ANY)) {
 5804                                         goto next_param;
 5805                                 }
 5806                                 sa = (struct sockaddr *)&sin;
 5807                                 inp = stcb->sctp_ep;
 5808                                 atomic_add_int(&stcb->asoc.refcnt, 1);
 5809                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
 5810                                     local_sa, stcb);
 5811                                 atomic_add_int(&stcb->asoc.refcnt, -1);
 5812 
 5813                                 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) ||
 5814                                     inp == NULL) {
 5815                                         /* we must add the source address */
 5816                                         /*
 5817                                          * no scope set since we have a tcb
 5818                                          * already
 5819                                          */
 5820 
 5821                                         /*
 5822                                          * we must validate the state again
 5823                                          * here
 5824                                          */
 5825                         add_it_now:
 5826                                         if (stcb->asoc.state == 0) {
 5827                                                 /* the assoc was freed? */
 5828                                                 return (-7);
 5829                                         }
 5830                                         if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) {
 5831                                                 return (-8);
 5832                                         }
 5833                                 } else if (stcb_tmp == stcb) {
 5834                                         if (stcb->asoc.state == 0) {
 5835                                                 /* the assoc was freed? */
 5836                                                 return (-10);
 5837                                         }
 5838                                         if (net != NULL) {
 5839                                                 /* clear flag */
 5840                                                 net->dest_state &=
 5841                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
 5842                                         }
 5843                                 } else {
 5844                                         /*
 5845                                          * strange, address is in another
 5846                                          * assoc? straighten out locks.
 5847                                          */
 5848                                         if (stcb_tmp) {
 5849                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
 5850                                                         /*
 5851                                                          * in setup state we
 5852                                                          * abort this guy
 5853                                                          */
 5854                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
 5855                                                             stcb_tmp, 1, NULL, 0);
 5856                                                         goto add_it_now;
 5857                                                 }
 5858                                                 SCTP_TCB_UNLOCK(stcb_tmp);
 5859                                         }
 5860                                         if (stcb->asoc.state == 0) {
 5861                                                 /* the assoc was freed? */
 5862                                                 return (-12);
 5863                                         }
 5864                                         return (-13);
 5865                                 }
 5866                         }
 5867                 } else if (ptype == SCTP_IPV6_ADDRESS) {
 5868                         if (stcb->asoc.ipv6_addr_legal) {
 5869                                 /* ok get the v6 address and check/add */
 5870                                 struct sctp_ipv6addr_param *p6, p6_buf;
 5871 
 5872                                 phdr = sctp_get_next_param(m, offset,
 5873                                     (struct sctp_paramhdr *)&p6_buf, sizeof(p6_buf));
 5874                                 if (plen != sizeof(struct sctp_ipv6addr_param) ||
 5875                                     phdr == NULL) {
 5876                                         return (-14);
 5877                                 }
 5878                                 p6 = (struct sctp_ipv6addr_param *)phdr;
 5879                                 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
 5880                                     sizeof(p6->addr));
 5881                                 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
 5882                                         /* Skip multi-cast addresses */
 5883                                         goto next_param;
 5884                                 }
 5885                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
 5886                                         /*
 5887                                          * Link local make no sense without
 5888                                          * scope
 5889                                          */
 5890                                         goto next_param;
 5891                                 }
 5892                                 sa = (struct sockaddr *)&sin6;
 5893                                 inp = stcb->sctp_ep;
 5894                                 atomic_add_int(&stcb->asoc.refcnt, 1);
 5895                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
 5896                                     local_sa, stcb);
 5897                                 atomic_add_int(&stcb->asoc.refcnt, -1);
 5898                                 if (stcb_tmp == NULL && (inp == stcb->sctp_ep ||
 5899                                     inp == NULL)) {
 5900                                         /*
 5901                                          * we must validate the state again
 5902                                          * here
 5903                                          */
 5904                         add_it_now6:
 5905                                         if (stcb->asoc.state == 0) {
 5906                                                 /* the assoc was freed? */
 5907                                                 return (-16);
 5908                                         }
 5909                                         /*
 5910                                          * we must add the address, no scope
 5911                                          * set
 5912                                          */
 5913                                         if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) {
 5914                                                 return (-17);
 5915                                         }
 5916                                 } else if (stcb_tmp == stcb) {
 5917                                         /*
 5918                                          * we must validate the state again
 5919                                          * here
 5920                                          */
 5921                                         if (stcb->asoc.state == 0) {
 5922                                                 /* the assoc was freed? */
 5923                                                 return (-19);
 5924                                         }
 5925                                         if (net != NULL) {
 5926                                                 /* clear flag */
 5927                                                 net->dest_state &=
 5928                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
 5929                                         }
 5930                                 } else {
 5931                                         /*
 5932                                          * strange, address is in another
 5933                                          * assoc? straighten out locks.
 5934                                          */
 5935                                         if (stcb_tmp)
 5936                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
 5937                                                         /*
 5938                                                          * in setup state we
 5939                                                          * abort this guy
 5940                                                          */
 5941                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
 5942                                                             stcb_tmp, 1, NULL, 0);
 5943                                                         goto add_it_now6;
 5944                                                 }
 5945                                         SCTP_TCB_UNLOCK(stcb_tmp);
 5946 
 5947                                         if (stcb->asoc.state == 0) {
 5948                                                 /* the assoc was freed? */
 5949                                                 return (-21);
 5950                                         }
 5951                                         return (-22);
 5952                                 }
 5953                         }
 5954                 } else if (ptype == SCTP_ECN_CAPABLE) {
 5955                         stcb->asoc.ecn_allowed = 1;
 5956                 } else if (ptype == SCTP_ULP_ADAPTATION) {
 5957                         if (stcb->asoc.state != SCTP_STATE_OPEN) {
 5958                                 struct sctp_adaptation_layer_indication ai,
 5959                                                                 *aip;
 5960 
 5961                                 phdr = sctp_get_next_param(m, offset,
 5962                                     (struct sctp_paramhdr *)&ai, sizeof(ai));
 5963                                 aip = (struct sctp_adaptation_layer_indication *)phdr;
 5964                                 if (aip) {
 5965                                         stcb->asoc.peers_adaptation = ntohl(aip->indication);
 5966                                         stcb->asoc.adaptation_needed = 1;
 5967                                 }
 5968                         }
 5969                 } else if (ptype == SCTP_SET_PRIM_ADDR) {
 5970                         struct sctp_asconf_addr_param lstore, *fee;
 5971                         struct sctp_asconf_addrv4_param *fii;
 5972                         int lptype;
 5973                         struct sockaddr *lsa = NULL;
 5974 
 5975                         stcb->asoc.peer_supports_asconf = 1;
 5976                         if (plen > sizeof(lstore)) {
 5977                                 return (-23);
 5978                         }
 5979                         phdr = sctp_get_next_param(m, offset,
 5980                             (struct sctp_paramhdr *)&lstore, min(plen, sizeof(lstore)));
 5981                         if (phdr == NULL) {
 5982                                 return (-24);
 5983                         }
 5984                         fee = (struct sctp_asconf_addr_param *)phdr;
 5985                         lptype = ntohs(fee->addrp.ph.param_type);
 5986                         if (lptype == SCTP_IPV4_ADDRESS) {
 5987                                 if (plen !=
 5988                                     sizeof(struct sctp_asconf_addrv4_param)) {
 5989                                         SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n",
 5990                                             (int)sizeof(struct sctp_asconf_addrv4_param),
 5991                                             plen);
 5992                                 } else {
 5993                                         fii = (struct sctp_asconf_addrv4_param *)fee;
 5994                                         sin.sin_addr.s_addr = fii->addrp.addr;
 5995                                         lsa = (struct sockaddr *)&sin;
 5996                                 }
 5997                         } else if (lptype == SCTP_IPV6_ADDRESS) {
 5998                                 if (plen !=
 5999                                     sizeof(struct sctp_asconf_addr_param)) {
 6000                                         SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
 6001                                             (int)sizeof(struct sctp_asconf_addr_param),
 6002                                             plen);
 6003                                 } else {
 6004                                         memcpy(sin6.sin6_addr.s6_addr,
 6005                                             fee->addrp.addr,
 6006                                             sizeof(fee->addrp.addr));
 6007                                         lsa = (struct sockaddr *)&sin6;
 6008                                 }
 6009                         }
 6010                         if (lsa) {
 6011                                 (void)sctp_set_primary_addr(stcb, sa, NULL);
 6012                         }
 6013                 } else if (ptype == SCTP_HAS_NAT_SUPPORT) {
 6014                         stcb->asoc.peer_supports_nat = 1;
 6015                 } else if (ptype == SCTP_PRSCTP_SUPPORTED) {
 6016                         /* Peer supports pr-sctp */
 6017                         stcb->asoc.peer_supports_prsctp = 1;
 6018                 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
 6019                         /* A supported extension chunk */
 6020                         struct sctp_supported_chunk_types_param *pr_supported;
 6021                         uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
 6022                         int num_ent, i;
 6023 
 6024                         phdr = sctp_get_next_param(m, offset,
 6025                             (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen));
 6026                         if (phdr == NULL) {
 6027                                 return (-25);
 6028                         }
 6029                         stcb->asoc.peer_supports_asconf = 0;
 6030                         stcb->asoc.peer_supports_prsctp = 0;
 6031                         stcb->asoc.peer_supports_pktdrop = 0;
 6032                         stcb->asoc.peer_supports_strreset = 0;
 6033                         stcb->asoc.peer_supports_auth = 0;
 6034                         pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
 6035                         num_ent = plen - sizeof(struct sctp_paramhdr);
 6036                         for (i = 0; i < num_ent; i++) {
 6037                                 switch (pr_supported->chunk_types[i]) {
 6038                                 case SCTP_ASCONF:
 6039                                 case SCTP_ASCONF_ACK:
 6040                                         stcb->asoc.peer_supports_asconf = 1;
 6041                                         break;
 6042                                 case SCTP_FORWARD_CUM_TSN:
 6043                                         stcb->asoc.peer_supports_prsctp = 1;
 6044                                         break;
 6045                                 case SCTP_PACKET_DROPPED:
 6046                                         stcb->asoc.peer_supports_pktdrop = 1;
 6047                                         break;
 6048                                 case SCTP_STREAM_RESET:
 6049                                         stcb->asoc.peer_supports_strreset = 1;
 6050                                         break;
 6051                                 case SCTP_AUTHENTICATION:
 6052                                         stcb->asoc.peer_supports_auth = 1;
 6053                                         break;
 6054                                 default:
 6055                                         /* one I have not learned yet */
 6056                                         break;
 6057 
 6058                                 }
 6059                         }
 6060                 } else if (ptype == SCTP_ECN_NONCE_SUPPORTED) {
 6061                         /* Peer supports ECN-nonce */
 6062                         stcb->asoc.peer_supports_ecn_nonce = 1;
 6063                         stcb->asoc.ecn_nonce_allowed = 1;
 6064                 } else if (ptype == SCTP_RANDOM) {
 6065                         if (plen > sizeof(random_store))
 6066                                 break;
 6067                         if (got_random) {
 6068                                 /* already processed a RANDOM */
 6069                                 goto next_param;
 6070                         }
 6071                         phdr = sctp_get_next_param(m, offset,
 6072                             (struct sctp_paramhdr *)random_store,
 6073                             min(sizeof(random_store), plen));
 6074                         if (phdr == NULL)
 6075                                 return (-26);
 6076                         p_random = (struct sctp_auth_random *)phdr;
 6077                         random_len = plen - sizeof(*p_random);
 6078                         /* enforce the random length */
 6079                         if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) {
 6080                                 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n");
 6081                                 return (-27);
 6082                         }
 6083                         got_random = 1;
 6084                 } else if (ptype == SCTP_HMAC_LIST) {
 6085                         int num_hmacs;
 6086                         int i;
 6087 
 6088                         if (plen > sizeof(hmacs_store))
 6089                                 break;
 6090                         if (got_hmacs) {
 6091                                 /* already processed a HMAC list */
 6092                                 goto next_param;
 6093                         }
 6094                         phdr = sctp_get_next_param(m, offset,
 6095                             (struct sctp_paramhdr *)hmacs_store,
 6096                             min(plen, sizeof(hmacs_store)));
 6097                         if (phdr == NULL)
 6098                                 return (-28);
 6099                         hmacs = (struct sctp_auth_hmac_algo *)phdr;
 6100                         hmacs_len = plen - sizeof(*hmacs);
 6101                         num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
 6102                         /* validate the hmac list */
 6103                         if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
 6104                                 return (-29);
 6105                         }
 6106                         if (stcb->asoc.peer_hmacs != NULL)
 6107                                 sctp_free_hmaclist(stcb->asoc.peer_hmacs);
 6108                         stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs);
 6109                         if (stcb->asoc.peer_hmacs != NULL) {
 6110                                 for (i = 0; i < num_hmacs; i++) {
 6111                                         (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs,
 6112                                             ntohs(hmacs->hmac_ids[i]));
 6113                                 }
 6114                         }
 6115                         got_hmacs = 1;
 6116                 } else if (ptype == SCTP_CHUNK_LIST) {
 6117                         int i;
 6118 
 6119                         if (plen > sizeof(chunks_store))
 6120                                 break;
 6121                         if (got_chklist) {
 6122                                 /* already processed a Chunks list */
 6123                                 goto next_param;
 6124                         }
 6125                         phdr = sctp_get_next_param(m, offset,
 6126                             (struct sctp_paramhdr *)chunks_store,
 6127                             min(plen, sizeof(chunks_store)));
 6128                         if (phdr == NULL)
 6129                                 return (-30);
 6130                         chunks = (struct sctp_auth_chunk_list *)phdr;
 6131                         num_chunks = plen - sizeof(*chunks);
 6132                         if (stcb->asoc.peer_auth_chunks != NULL)
 6133                                 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks);
 6134                         else
 6135                                 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist();
 6136                         for (i = 0; i < num_chunks; i++) {
 6137                                 (void)sctp_auth_add_chunk(chunks->chunk_types[i],
 6138                                     stcb->asoc.peer_auth_chunks);
 6139                                 /* record asconf/asconf-ack if listed */
 6140                                 if (chunks->chunk_types[i] == SCTP_ASCONF)
 6141                                         saw_asconf = 1;
 6142                                 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK)
 6143                                         saw_asconf_ack = 1;
 6144 
 6145                         }
 6146                         got_chklist = 1;
 6147                 } else if ((ptype == SCTP_HEARTBEAT_INFO) ||
 6148                             (ptype == SCTP_STATE_COOKIE) ||
 6149                             (ptype == SCTP_UNRECOG_PARAM) ||
 6150                             (ptype == SCTP_COOKIE_PRESERVE) ||
 6151                             (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
 6152                             (ptype == SCTP_ADD_IP_ADDRESS) ||
 6153                             (ptype == SCTP_DEL_IP_ADDRESS) ||
 6154                             (ptype == SCTP_ERROR_CAUSE_IND) ||
 6155                     (ptype == SCTP_SUCCESS_REPORT)) {
 6156                          /* don't care */ ;
 6157                 } else {
 6158                         if ((ptype & 0x8000) == 0x0000) {
 6159                                 /*
 6160                                  * must stop processing the rest of the
 6161                                  * param's. Any report bits were handled
 6162                                  * with the call to
 6163                                  * sctp_arethere_unrecognized_parameters()
 6164                                  * when the INIT or INIT-ACK was first seen.
 6165                                  */
 6166                                 break;
 6167                         }
 6168                 }
 6169 next_param:
 6170                 offset += SCTP_SIZE32(plen);
 6171                 if (offset >= limit) {
 6172                         break;
 6173                 }
 6174                 phdr = sctp_get_next_param(m, offset, &parm_buf,
 6175                     sizeof(parm_buf));
 6176         }
 6177         /* Now check to see if we need to purge any addresses */
 6178         for (net = TAILQ_FIRST(&stcb->asoc.nets); net != NULL; net = net_tmp) {
 6179                 net_tmp = TAILQ_NEXT(net, sctp_next);
 6180                 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
 6181                     SCTP_ADDR_NOT_IN_ASSOC) {
 6182                         /* This address has been removed from the asoc */
 6183                         /* remove and free it */
 6184                         stcb->asoc.numnets--;
 6185                         TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
 6186                         sctp_free_remote_addr(net);
 6187                         if (net == stcb->asoc.primary_destination) {
 6188                                 stcb->asoc.primary_destination = NULL;
 6189                                 sctp_select_primary_destination(stcb);
 6190                         }
 6191                 }
 6192         }
 6193         /* validate authentication required parameters */
 6194         if (got_random && got_hmacs) {
 6195                 stcb->asoc.peer_supports_auth = 1;
 6196         } else {
 6197                 stcb->asoc.peer_supports_auth = 0;
 6198         }
 6199         if (!stcb->asoc.peer_supports_auth && got_chklist) {
 6200                 /* peer does not support auth but sent a chunks list? */
 6201                 return (-31);
 6202         }
 6203         if (!SCTP_BASE_SYSCTL(sctp_asconf_auth_nochk) && stcb->asoc.peer_supports_asconf &&
 6204             !stcb->asoc.peer_supports_auth) {
 6205                 /* peer supports asconf but not auth? */
 6206                 return (-32);
 6207         } else if ((stcb->asoc.peer_supports_asconf) && (stcb->asoc.peer_supports_auth) &&
 6208             ((saw_asconf == 0) || (saw_asconf_ack == 0))) {
 6209                 return (-33);
 6210         }
 6211         /* concatenate the full random key */
 6212 #ifdef SCTP_AUTH_DRAFT_04
 6213         keylen = random_len;
 6214         new_key = sctp_alloc_key(keylen);
 6215         if (new_key != NULL) {
 6216                 /* copy in the RANDOM */
 6217                 if (p_random != NULL)
 6218                         bcopy(p_random->random_data, new_key->key, random_len);
 6219         }
 6220 #else
 6221         keylen = sizeof(*p_random) + random_len + sizeof(*chunks) + num_chunks +
 6222             sizeof(*hmacs) + hmacs_len;
 6223         new_key = sctp_alloc_key(keylen);
 6224         if (new_key != NULL) {
 6225                 /* copy in the RANDOM */
 6226                 if (p_random != NULL) {
 6227                         keylen = sizeof(*p_random) + random_len;
 6228                         bcopy(p_random, new_key->key, keylen);
 6229                 }
 6230                 /* append in the AUTH chunks */
 6231                 if (chunks != NULL) {
 6232                         bcopy(chunks, new_key->key + keylen,
 6233                             sizeof(*chunks) + num_chunks);
 6234                         keylen += sizeof(*chunks) + num_chunks;
 6235                 }
 6236                 /* append in the HMACs */
 6237                 if (hmacs != NULL) {
 6238                         bcopy(hmacs, new_key->key + keylen,
 6239                             sizeof(*hmacs) + hmacs_len);
 6240                 }
 6241         }
 6242 #endif
 6243         else {
 6244                 /* failed to get memory for the key */
 6245                 return (-34);
 6246         }
 6247         if (stcb->asoc.authinfo.peer_random != NULL)
 6248                 sctp_free_key(stcb->asoc.authinfo.peer_random);
 6249         stcb->asoc.authinfo.peer_random = new_key;
 6250 #ifdef SCTP_AUTH_DRAFT_04
 6251         /* don't include the chunks and hmacs for draft -04 */
 6252         stcb->asoc.authinfo.peer_random->keylen = random_len;
 6253 #endif
 6254         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
 6255         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
 6256 
 6257         return (0);
 6258 }
 6259 
 6260 int
 6261 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
 6262     struct sctp_nets *net)
 6263 {
 6264         /* make sure the requested primary address exists in the assoc */
 6265         if (net == NULL && sa)
 6266                 net = sctp_findnet(stcb, sa);
 6267 
 6268         if (net == NULL) {
 6269                 /* didn't find the requested primary address! */
 6270                 return (-1);
 6271         } else {
 6272                 /* set the primary address */
 6273                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
 6274                         /* Must be confirmed, so queue to set */
 6275                         net->dest_state |= SCTP_ADDR_REQ_PRIMARY;
 6276                         return (0);
 6277                 }
 6278                 stcb->asoc.primary_destination = net;
 6279                 net->dest_state &= ~SCTP_ADDR_WAS_PRIMARY;
 6280                 net = TAILQ_FIRST(&stcb->asoc.nets);
 6281                 if (net != stcb->asoc.primary_destination) {
 6282                         /*
 6283                          * first one on the list is NOT the primary
 6284                          * sctp_cmpaddr() is much more efficent if the
 6285                          * primary is the first on the list, make it so.
 6286                          */
 6287                         TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
 6288                         TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
 6289                 }
 6290                 return (0);
 6291         }
 6292 }
 6293 
 6294 int
 6295 sctp_is_vtag_good(struct sctp_inpcb *inp, uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now, int save_in_twait)
 6296 {
 6297         /*
 6298          * This function serves two purposes. It will see if a TAG can be
 6299          * re-used and return 1 for yes it is ok and 0 for don't use that
 6300          * tag. A secondary function it will do is purge out old tags that
 6301          * can be removed.
 6302          */
 6303         struct sctpvtaghead *chain;
 6304         struct sctp_tagblock *twait_block;
 6305         struct sctpasochead *head;
 6306         struct sctp_tcb *stcb;
 6307         int i;
 6308 
 6309         SCTP_INP_INFO_RLOCK();
 6310         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
 6311             SCTP_BASE_INFO(hashasocmark))];
 6312         if (head == NULL) {
 6313                 /* invalid vtag */
 6314                 goto skip_vtag_check;
 6315         }
 6316         LIST_FOREACH(stcb, head, sctp_asocs) {
 6317                 /*
 6318                  * We choose not to lock anything here. TCB's can't be
 6319                  * removed since we have the read lock, so they can't be
 6320                  * freed on us, same thing for the INP. I may be wrong with
 6321                  * this assumption, but we will go with it for now :-)
 6322                  */
 6323                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
 6324                         continue;
 6325                 }
 6326                 if (stcb->asoc.my_vtag == tag) {
 6327                         /* candidate */
 6328                         if (stcb->rport != rport) {
 6329                                 continue;
 6330                         }
 6331                         if (stcb->sctp_ep->sctp_lport != lport) {
 6332                                 continue;
 6333                         }
 6334                         /* Its a used tag set */
 6335                         SCTP_INP_INFO_WUNLOCK();
 6336                         return (0);
 6337                 }
 6338         }
 6339 skip_vtag_check:
 6340 
 6341         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
 6342         /* Now what about timed wait ? */
 6343         if (!LIST_EMPTY(chain)) {
 6344                 /*
 6345                  * Block(s) are present, lets see if we have this tag in the
 6346                  * list
 6347                  */
 6348                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
 6349                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
 6350                                 if (twait_block->vtag_block[i].v_tag == 0) {
 6351                                         /* not used */
 6352                                         continue;
 6353                                 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire <
 6354                                     now->tv_sec) {
 6355                                         /* Audit expires this guy */
 6356                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
 6357                                         twait_block->vtag_block[i].v_tag = 0;
 6358                                 } else if ((twait_block->vtag_block[i].v_tag == tag) &&
 6359                                             (twait_block->vtag_block[i].lport == lport) &&
 6360                                     (twait_block->vtag_block[i].rport == rport)) {
 6361                                         /* Bad tag, sorry :< */
 6362                                         SCTP_INP_INFO_WUNLOCK();
 6363                                         return (0);
 6364                                 }
 6365                         }
 6366                 }
 6367         }
 6368         SCTP_INP_INFO_RUNLOCK();
 6369         return (1);
 6370 }
 6371 
 6372 
 6373 static sctp_assoc_t reneged_asoc_ids[256];
 6374 static uint8_t reneged_at = 0;
 6375 
 6376 
 6377 static void
 6378 sctp_drain_mbufs(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
 6379 {
 6380         /*
 6381          * We must hunt this association for MBUF's past the cumack (i.e.
 6382          * out of order data that we can renege on).
 6383          */
 6384         struct sctp_association *asoc;
 6385         struct sctp_tmit_chunk *chk, *nchk;
 6386         uint32_t cumulative_tsn_p1, tsn;
 6387         struct sctp_queued_to_read *ctl, *nctl;
 6388         int cnt, strmat, gap;
 6389 
 6390         /* We look for anything larger than the cum-ack + 1 */
 6391 
 6392         SCTP_STAT_INCR(sctps_protocol_drain_calls);
 6393         if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) {
 6394                 return;
 6395         }
 6396         asoc = &stcb->asoc;
 6397         if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) {
 6398                 /* none we can reneg on. */
 6399                 return;
 6400         }
 6401         SCTP_STAT_INCR(sctps_protocol_drains_done);
 6402         cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
 6403         cnt = 0;
 6404         /* First look in the re-assembly queue */
 6405         chk = TAILQ_FIRST(&asoc->reasmqueue);
 6406         while (chk) {
 6407                 /* Get the next one */
 6408                 nchk = TAILQ_NEXT(chk, sctp_next);
 6409                 if (compare_with_wrap(chk->rec.data.TSN_seq,
 6410                     cumulative_tsn_p1, MAX_TSN)) {
 6411                         /* Yep it is above cum-ack */
 6412                         cnt++;
 6413                         tsn = chk->rec.data.TSN_seq;
 6414                         if (tsn >= asoc->mapping_array_base_tsn) {
 6415                                 gap = tsn - asoc->mapping_array_base_tsn;
 6416                         } else {
 6417                                 gap = (MAX_TSN - asoc->mapping_array_base_tsn) +
 6418                                     tsn + 1;
 6419                         }
 6420                         asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size);
 6421                         sctp_ucount_decr(asoc->cnt_on_reasm_queue);
 6422                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
 6423                         TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
 6424                         if (chk->data) {
 6425                                 sctp_m_freem(chk->data);
 6426                                 chk->data = NULL;
 6427                         }
 6428                         sctp_free_a_chunk(stcb, chk);
 6429                 }
 6430                 chk = nchk;
 6431         }
 6432         /* Ok that was fun, now we will drain all the inbound streams? */
 6433         for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
 6434                 ctl = TAILQ_FIRST(&asoc->strmin[strmat].inqueue);
 6435                 while (ctl) {
 6436                         nctl = TAILQ_NEXT(ctl, next);
 6437                         if (compare_with_wrap(ctl->sinfo_tsn,
 6438                             cumulative_tsn_p1, MAX_TSN)) {
 6439                                 /* Yep it is above cum-ack */
 6440                                 cnt++;
 6441                                 tsn = ctl->sinfo_tsn;
 6442                                 if (tsn >= asoc->mapping_array_base_tsn) {
 6443                                         gap = tsn -
 6444                                             asoc->mapping_array_base_tsn;
 6445                                 } else {
 6446                                         gap = (MAX_TSN -
 6447                                             asoc->mapping_array_base_tsn) +
 6448                                             tsn + 1;
 6449                                 }
 6450                                 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length);
 6451                                 sctp_ucount_decr(asoc->cnt_on_all_streams);
 6452 
 6453                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array,
 6454                                     gap);
 6455                                 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue,
 6456                                     ctl, next);
 6457                                 if (ctl->data) {
 6458                                         sctp_m_freem(ctl->data);
 6459                                         ctl->data = NULL;
 6460                                 }
 6461                                 sctp_free_remote_addr(ctl->whoFrom);
 6462                                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl);
 6463                                 SCTP_DECR_READQ_COUNT();
 6464                         }
 6465                         ctl = nctl;
 6466                 }
 6467         }
 6468         /*
 6469          * Question, should we go through the delivery queue? The only
 6470          * reason things are on here is the app not reading OR a p-d-api up.
 6471          * An attacker COULD send enough in to initiate the PD-API and then
 6472          * send a bunch of stuff to other streams... these would wind up on
 6473          * the delivery queue.. and then we would not get to them. But in
 6474          * order to do this I then have to back-track and un-deliver
 6475          * sequence numbers in streams.. el-yucko. I think for now we will
 6476          * NOT look at the delivery queue and leave it to be something to
 6477          * consider later. An alternative would be to abort the P-D-API with
 6478          * a notification and then deliver the data.... Or another method
 6479          * might be to keep track of how many times the situation occurs and
 6480          * if we see a possible attack underway just abort the association.
 6481          */
 6482 #ifdef SCTP_DEBUG
 6483         if (cnt) {
 6484                 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt);
 6485         }
 6486 #endif
 6487         if (cnt) {
 6488                 /*
 6489                  * Now do we need to find a new
 6490                  * asoc->highest_tsn_inside_map?
 6491                  */
 6492                 if (asoc->highest_tsn_inside_map >= asoc->mapping_array_base_tsn) {
 6493                         gap = asoc->highest_tsn_inside_map - asoc->mapping_array_base_tsn;
 6494                 } else {
 6495                         gap = (MAX_TSN - asoc->mapping_array_base_tsn) +
 6496                             asoc->highest_tsn_inside_map + 1;
 6497                 }
 6498                 if (gap >= (asoc->mapping_array_size << 3)) {
 6499                         /*
 6500                          * Something bad happened or cum-ack and high were
 6501                          * behind the base, but if so earlier checks should
 6502                          * have found NO data... wierd... we will start at
 6503                          * end of mapping array.
 6504                          */
 6505                         SCTP_PRINTF("Gap was larger than array?? %d set to max:%d maparraymax:%x\n",
 6506                             (int)gap,
 6507                             (int)(asoc->mapping_array_size << 3),
 6508                             (int)asoc->highest_tsn_inside_map);
 6509                         gap = asoc->mapping_array_size << 3;
 6510                 }
 6511                 while (gap > 0) {
 6512                         if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) {
 6513                                 /* found the new highest */
 6514                                 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn + gap;
 6515                                 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MAP_LOGGING_ENABLE) {
 6516                                         sctp_log_map(0, 8, asoc->highest_tsn_inside_map, SCTP_MAP_SLIDE_RESULT);
 6517                                 }
 6518                                 break;
 6519                         }
 6520                         gap--;
 6521                 }
 6522                 if (gap == 0) {
 6523                         /* Nothing left in map */
 6524                         memset(asoc->mapping_array, 0, asoc->mapping_array_size);
 6525                         asoc->mapping_array_base_tsn = asoc->cumulative_tsn + 1;
 6526                         asoc->highest_tsn_inside_map = asoc->cumulative_tsn;
 6527                         if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MAP_LOGGING_ENABLE) {
 6528                                 sctp_log_map(0, 9, asoc->highest_tsn_inside_map, SCTP_MAP_SLIDE_RESULT);
 6529                         }
 6530                 }
 6531                 asoc->last_revoke_count = cnt;
 6532                 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
 6533                 /* sa_ignore NO_NULL_CHK */
 6534                 sctp_send_sack(stcb);
 6535                 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED);
 6536                 reneged_asoc_ids[reneged_at] = sctp_get_associd(stcb);
 6537                 reneged_at++;
 6538         }
 6539         /*
 6540          * Another issue, in un-setting the TSN's in the mapping array we
 6541          * DID NOT adjust the higest_tsn marker.  This will cause one of two
 6542          * things to occur. It may cause us to do extra work in checking for
 6543          * our mapping array movement. More importantly it may cause us to
 6544          * SACK every datagram. This may not be a bad thing though since we
 6545          * will recover once we get our cum-ack above and all this stuff we
 6546          * dumped recovered.
 6547          */
 6548 }
 6549 
 6550 void
 6551 sctp_drain()
 6552 {
 6553         /*
 6554          * We must walk the PCB lists for ALL associations here. The system
 6555          * is LOW on MBUF's and needs help. This is where reneging will
 6556          * occur. We really hope this does NOT happen!
 6557          */
 6558         struct sctp_inpcb *inp;
 6559         struct sctp_tcb *stcb;
 6560 
 6561         SCTP_INP_INFO_RLOCK();
 6562         LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) {
 6563                 /* For each endpoint */
 6564                 SCTP_INP_RLOCK(inp);
 6565                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
 6566                         /* For each association */
 6567                         SCTP_TCB_LOCK(stcb);
 6568                         sctp_drain_mbufs(inp, stcb);
 6569                         SCTP_TCB_UNLOCK(stcb);
 6570                 }
 6571                 SCTP_INP_RUNLOCK(inp);
 6572         }
 6573         SCTP_INP_INFO_RUNLOCK();
 6574 }
 6575 
 6576 /*
 6577  * start a new iterator
 6578  * iterates through all endpoints and associations based on the pcb_state
 6579  * flags and asoc_state.  "af" (mandatory) is executed for all matching
 6580  * assocs and "ef" (optional) is executed when the iterator completes.
 6581  * "inpf" (optional) is executed for each new endpoint as it is being
 6582  * iterated through. inpe (optional) is called when the inp completes
 6583  * its way through all the stcbs.
 6584  */
 6585 int
 6586 sctp_initiate_iterator(inp_func inpf,
 6587     asoc_func af,
 6588     inp_func inpe,
 6589     uint32_t pcb_state,
 6590     uint32_t pcb_features,
 6591     uint32_t asoc_state,
 6592     void *argp,
 6593     uint32_t argi,
 6594     end_func ef,
 6595     struct sctp_inpcb *s_inp,
 6596     uint8_t chunk_output_off)
 6597 {
 6598         struct sctp_iterator *it = NULL;
 6599 
 6600         if (af == NULL) {
 6601                 return (-1);
 6602         }
 6603         SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator),
 6604             SCTP_M_ITER);
 6605         if (it == NULL) {
 6606                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
 6607                 return (ENOMEM);
 6608         }
 6609         memset(it, 0, sizeof(*it));
 6610         it->function_assoc = af;
 6611         it->function_inp = inpf;
 6612         if (inpf)
 6613                 it->done_current_ep = 0;
 6614         else
 6615                 it->done_current_ep = 1;
 6616         it->function_atend = ef;
 6617         it->pointer = argp;
 6618         it->val = argi;
 6619         it->pcb_flags = pcb_state;
 6620         it->pcb_features = pcb_features;
 6621         it->asoc_state = asoc_state;
 6622         it->function_inp_end = inpe;
 6623         it->no_chunk_output = chunk_output_off;
 6624         if (s_inp) {
 6625                 it->inp = s_inp;
 6626                 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
 6627         } else {
 6628                 SCTP_INP_INFO_RLOCK();
 6629                 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead));
 6630 
 6631                 SCTP_INP_INFO_RUNLOCK();
 6632                 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
 6633 
 6634         }
 6635         SCTP_IPI_ITERATOR_WQ_LOCK();
 6636         if (it->inp) {
 6637                 SCTP_INP_INCR_REF(it->inp);
 6638         }
 6639         TAILQ_INSERT_TAIL(&SCTP_BASE_INFO(iteratorhead), it, sctp_nxt_itr);
 6640 #if defined(SCTP_USE_THREAD_BASED_ITERATOR)
 6641         if (SCTP_BASE_INFO(iterator_running) == 0) {
 6642                 sctp_wakeup_iterator();
 6643         }
 6644         SCTP_IPI_ITERATOR_WQ_UNLOCK();
 6645 #else
 6646         if (it->inp)
 6647                 SCTP_INP_DECR_REF(it->inp);
 6648         SCTP_IPI_ITERATOR_WQ_UNLOCK();
 6649         /* Init the timer */
 6650         SCTP_OS_TIMER_INIT(&it->tmr.timer);
 6651         /* add to the list of all iterators */
 6652         sctp_timer_start(SCTP_TIMER_TYPE_ITERATOR, (struct sctp_inpcb *)it,
 6653             NULL, NULL);
 6654 #endif
 6655         /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */
 6656         return (0);
 6657 }

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