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/8.0/sys/netinet/sctp_pcb.c 197256 2009-09-16 13:44:12Z 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, 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, 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                 if (vrf->vrf_addr_hash) {
  231                         SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
  232                         vrf->vrf_addr_hash = NULL;
  233                 }
  234                 /* We zero'd the count */
  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 (SCTP_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, 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, 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 
 2528                 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id,
 2529                     new_inp->hashasocidmark)];
 2530                 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash);
 2531         }
 2532         /* Ok. Let's restart timer. */
 2533         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 2534                 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp,
 2535                     stcb, net);
 2536         }
 2537 
 2538         SCTP_INP_INFO_WUNLOCK();
 2539         if (new_inp->sctp_tcbhash != NULL) {
 2540                 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark);
 2541                 new_inp->sctp_tcbhash = NULL;
 2542         }
 2543         if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
 2544                 /* Subset bound, so copy in the laddr list from the old_inp */
 2545                 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) {
 2546                         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
 2547                         if (laddr == NULL) {
 2548                                 /*
 2549                                  * Gak, what can we do? This assoc is really
 2550                                  * HOSED. We probably should send an abort
 2551                                  * here.
 2552                                  */
 2553                                 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n");
 2554                                 continue;
 2555                         }
 2556                         SCTP_INCR_LADDR_COUNT();
 2557                         bzero(laddr, sizeof(*laddr));
 2558                         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
 2559                         laddr->ifa = oladdr->ifa;
 2560                         atomic_add_int(&laddr->ifa->refcount, 1);
 2561                         LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr,
 2562                             sctp_nxt_addr);
 2563                         new_inp->laddr_count++;
 2564                 }
 2565         }
 2566         /*
 2567          * Now any running timers need to be adjusted since we really don't
 2568          * care if they are running or not just blast in the new_inp into
 2569          * all of them.
 2570          */
 2571 
 2572         stcb->asoc.hb_timer.ep = (void *)new_inp;
 2573         stcb->asoc.dack_timer.ep = (void *)new_inp;
 2574         stcb->asoc.asconf_timer.ep = (void *)new_inp;
 2575         stcb->asoc.strreset_timer.ep = (void *)new_inp;
 2576         stcb->asoc.shut_guard_timer.ep = (void *)new_inp;
 2577         stcb->asoc.autoclose_timer.ep = (void *)new_inp;
 2578         stcb->asoc.delayed_event_timer.ep = (void *)new_inp;
 2579         stcb->asoc.delete_prim_timer.ep = (void *)new_inp;
 2580         /* now what about the nets? */
 2581         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 2582                 net->pmtu_timer.ep = (void *)new_inp;
 2583                 net->rxt_timer.ep = (void *)new_inp;
 2584                 net->fr_timer.ep = (void *)new_inp;
 2585         }
 2586         SCTP_INP_WUNLOCK(new_inp);
 2587         SCTP_INP_WUNLOCK(old_inp);
 2588 }
 2589 
 2590 
 2591 
 2592 
 2593 /* sctp_ifap is used to bypass normal local address validation checks */
 2594 int
 2595 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr,
 2596     struct sctp_ifa *sctp_ifap, struct thread *p)
 2597 {
 2598         /* bind a ep to a socket address */
 2599         struct sctppcbhead *head;
 2600         struct sctp_inpcb *inp, *inp_tmp;
 2601         struct inpcb *ip_inp;
 2602         int port_reuse_active = 0;
 2603         int bindall;
 2604         uint16_t lport;
 2605         int error;
 2606         uint32_t vrf_id;
 2607 
 2608         lport = 0;
 2609         error = 0;
 2610         bindall = 1;
 2611         inp = (struct sctp_inpcb *)so->so_pcb;
 2612         ip_inp = (struct inpcb *)so->so_pcb;
 2613 #ifdef SCTP_DEBUG
 2614         if (addr) {
 2615                 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port:%d\n",
 2616                     ntohs(((struct sockaddr_in *)addr)->sin_port));
 2617                 SCTPDBG(SCTP_DEBUG_PCB1, "Addr :");
 2618                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
 2619         }
 2620 #endif
 2621         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
 2622                 /* already did a bind, subsequent binds NOT allowed ! */
 2623                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
 2624                 return (EINVAL);
 2625         }
 2626 #ifdef INVARIANTS
 2627         if (p == NULL)
 2628                 panic("null proc/thread");
 2629 #endif
 2630         if (addr != NULL) {
 2631                 switch (addr->sa_family) {
 2632                 case AF_INET:
 2633                         {
 2634                                 struct sockaddr_in *sin;
 2635 
 2636                                 /* IPV6_V6ONLY socket? */
 2637                                 if (SCTP_IPV6_V6ONLY(ip_inp)) {
 2638                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
 2639                                         return (EINVAL);
 2640                                 }
 2641                                 if (addr->sa_len != sizeof(*sin)) {
 2642                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
 2643                                         return (EINVAL);
 2644                                 }
 2645                                 sin = (struct sockaddr_in *)addr;
 2646                                 lport = sin->sin_port;
 2647                                 /*
 2648                                  * For LOOPBACK the prison_local_ip4() call
 2649                                  * will transmute the ip address to the
 2650                                  * proper value.
 2651                                  */
 2652                                 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) {
 2653                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
 2654                                         return (error);
 2655                                 }
 2656                                 if (sin->sin_addr.s_addr != INADDR_ANY) {
 2657                                         bindall = 0;
 2658                                 }
 2659                                 break;
 2660                         }
 2661 #ifdef INET6
 2662                 case AF_INET6:
 2663                         {
 2664                                 /*
 2665                                  * Only for pure IPv6 Address. (No IPv4
 2666                                  * Mapped!)
 2667                                  */
 2668                                 struct sockaddr_in6 *sin6;
 2669 
 2670                                 sin6 = (struct sockaddr_in6 *)addr;
 2671 
 2672                                 if (addr->sa_len != sizeof(*sin6)) {
 2673                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
 2674                                         return (EINVAL);
 2675                                 }
 2676                                 lport = sin6->sin6_port;
 2677 
 2678                                 /*
 2679                                  * For LOOPBACK the prison_local_ip6() call
 2680                                  * will transmute the ipv6 address to the
 2681                                  * proper value.
 2682                                  */
 2683                                 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr,
 2684                                     (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) {
 2685                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
 2686                                         return (error);
 2687                                 }
 2688                                 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
 2689                                         bindall = 0;
 2690                                         /* KAME hack: embed scopeid */
 2691                                         if (sa6_embedscope(sin6, MODULE_GLOBAL(MOD_INET6, ip6_use_defzone)) != 0) {
 2692                                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
 2693                                                 return (EINVAL);
 2694                                         }
 2695                                 }
 2696                                 /* this must be cleared for ifa_ifwithaddr() */
 2697                                 sin6->sin6_scope_id = 0;
 2698                                 break;
 2699                         }
 2700 #endif
 2701                 default:
 2702                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT);
 2703                         return (EAFNOSUPPORT);
 2704                 }
 2705         }
 2706         SCTP_INP_INFO_WLOCK();
 2707         SCTP_INP_WLOCK(inp);
 2708         /* Setup a vrf_id to be the default for the non-bind-all case. */
 2709         vrf_id = inp->def_vrf_id;
 2710 
 2711         /* increase our count due to the unlock we do */
 2712         SCTP_INP_INCR_REF(inp);
 2713         if (lport) {
 2714                 /*
 2715                  * Did the caller specify a port? if so we must see if a ep
 2716                  * already has this one bound.
 2717                  */
 2718                 /* got to be root to get at low ports */
 2719                 if (ntohs(lport) < IPPORT_RESERVED) {
 2720                         if (p && (error =
 2721                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
 2722                             )) {
 2723                                 SCTP_INP_DECR_REF(inp);
 2724                                 SCTP_INP_WUNLOCK(inp);
 2725                                 SCTP_INP_INFO_WUNLOCK();
 2726                                 return (error);
 2727                         }
 2728                 }
 2729                 if (p == NULL) {
 2730                         SCTP_INP_DECR_REF(inp);
 2731                         SCTP_INP_WUNLOCK(inp);
 2732                         SCTP_INP_INFO_WUNLOCK();
 2733                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
 2734                         return (error);
 2735                 }
 2736                 SCTP_INP_WUNLOCK(inp);
 2737                 if (bindall) {
 2738                         vrf_id = inp->def_vrf_id;
 2739                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
 2740                         if (inp_tmp != NULL) {
 2741                                 /*
 2742                                  * lock guy returned and lower count note
 2743                                  * that we are not bound so inp_tmp should
 2744                                  * NEVER be inp. And it is this inp
 2745                                  * (inp_tmp) that gets the reference bump,
 2746                                  * so we must lower it.
 2747                                  */
 2748                                 SCTP_INP_DECR_REF(inp_tmp);
 2749                                 /* unlock info */
 2750                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
 2751                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
 2752                                         /*
 2753                                          * Ok, must be one-2-one and
 2754                                          * allowing port re-use
 2755                                          */
 2756                                         port_reuse_active = 1;
 2757                                         goto continue_anyway;
 2758                                 }
 2759                                 SCTP_INP_DECR_REF(inp);
 2760                                 SCTP_INP_INFO_WUNLOCK();
 2761                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
 2762                                 return (EADDRINUSE);
 2763                         }
 2764                 } else {
 2765                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
 2766                         if (inp_tmp != NULL) {
 2767                                 /*
 2768                                  * lock guy returned and lower count note
 2769                                  * that we are not bound so inp_tmp should
 2770                                  * NEVER be inp. And it is this inp
 2771                                  * (inp_tmp) that gets the reference bump,
 2772                                  * so we must lower it.
 2773                                  */
 2774                                 SCTP_INP_DECR_REF(inp_tmp);
 2775                                 /* unlock info */
 2776                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
 2777                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
 2778                                         /*
 2779                                          * Ok, must be one-2-one and
 2780                                          * allowing port re-use
 2781                                          */
 2782                                         port_reuse_active = 1;
 2783                                         goto continue_anyway;
 2784                                 }
 2785                                 SCTP_INP_DECR_REF(inp);
 2786                                 SCTP_INP_INFO_WUNLOCK();
 2787                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
 2788                                 return (EADDRINUSE);
 2789                         }
 2790                 }
 2791 continue_anyway:
 2792                 SCTP_INP_WLOCK(inp);
 2793                 if (bindall) {
 2794                         /* verify that no lport is not used by a singleton */
 2795                         if ((port_reuse_active == 0) &&
 2796                             (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))
 2797                             ) {
 2798                                 /* Sorry someone already has this one bound */
 2799                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
 2800                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
 2801                                         port_reuse_active = 1;
 2802                                 } else {
 2803                                         SCTP_INP_DECR_REF(inp);
 2804                                         SCTP_INP_WUNLOCK(inp);
 2805                                         SCTP_INP_INFO_WUNLOCK();
 2806                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
 2807                                         return (EADDRINUSE);
 2808                                 }
 2809                         }
 2810                 }
 2811         } else {
 2812                 uint16_t first, last, candidate;
 2813                 uint16_t count;
 2814                 int done;
 2815 
 2816                 if (ip_inp->inp_flags & INP_HIGHPORT) {
 2817                         first = MODULE_GLOBAL(MOD_INET, ipport_hifirstauto);
 2818                         last = MODULE_GLOBAL(MOD_INET, ipport_hilastauto);
 2819                 } else if (ip_inp->inp_flags & INP_LOWPORT) {
 2820                         if (p && (error =
 2821                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
 2822                             )) {
 2823                                 SCTP_INP_DECR_REF(inp);
 2824                                 SCTP_INP_WUNLOCK(inp);
 2825                                 SCTP_INP_INFO_WUNLOCK();
 2826                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
 2827                                 return (error);
 2828                         }
 2829                         first = MODULE_GLOBAL(MOD_INET, ipport_lowfirstauto);
 2830                         last = MODULE_GLOBAL(MOD_INET, ipport_lowlastauto);
 2831                 } else {
 2832                         first = MODULE_GLOBAL(MOD_INET, ipport_firstauto);
 2833                         last = MODULE_GLOBAL(MOD_INET, ipport_lastauto);
 2834                 }
 2835                 if (first > last) {
 2836                         uint16_t temp;
 2837 
 2838                         temp = first;
 2839                         first = last;
 2840                         last = temp;
 2841                 }
 2842                 count = last - first + 1;       /* number of candidates */
 2843                 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count);
 2844 
 2845                 done = 0;
 2846                 while (!done) {
 2847                         if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) {
 2848                                 done = 1;
 2849                         }
 2850                         if (!done) {
 2851                                 if (--count == 0) {
 2852                                         SCTP_INP_DECR_REF(inp);
 2853                                         SCTP_INP_WUNLOCK(inp);
 2854                                         SCTP_INP_INFO_WUNLOCK();
 2855                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
 2856                                         return (EADDRINUSE);
 2857                                 }
 2858                                 if (candidate == last)
 2859                                         candidate = first;
 2860                                 else
 2861                                         candidate = candidate + 1;
 2862                         }
 2863                 }
 2864                 lport = htons(candidate);
 2865         }
 2866         SCTP_INP_DECR_REF(inp);
 2867         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
 2868             SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
 2869                 /*
 2870                  * this really should not happen. The guy did a non-blocking
 2871                  * bind and then did a close at the same time.
 2872                  */
 2873                 SCTP_INP_WUNLOCK(inp);
 2874                 SCTP_INP_INFO_WUNLOCK();
 2875                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
 2876                 return (EINVAL);
 2877         }
 2878         /* ok we look clear to give out this port, so lets setup the binding */
 2879         if (bindall) {
 2880                 /* binding to all addresses, so just set in the proper flags */
 2881                 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL;
 2882                 /* set the automatic addr changes from kernel flag */
 2883                 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) {
 2884                         sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF);
 2885                         sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
 2886                 } else {
 2887                         sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
 2888                         sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
 2889                 }
 2890                 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) {
 2891                         sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
 2892                 } else {
 2893                         sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
 2894                 }
 2895                 /*
 2896                  * set the automatic mobility_base from kernel flag (by
 2897                  * micchie)
 2898                  */
 2899                 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) {
 2900                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE);
 2901                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
 2902                 } else {
 2903                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE);
 2904                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
 2905                 }
 2906                 /*
 2907                  * set the automatic mobility_fasthandoff from kernel flag
 2908                  * (by micchie)
 2909                  */
 2910                 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) {
 2911                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF);
 2912                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
 2913                 } else {
 2914                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF);
 2915                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
 2916                 }
 2917         } else {
 2918                 /*
 2919                  * bind specific, make sure flags is off and add a new
 2920                  * address structure to the sctp_addr_list inside the ep
 2921                  * structure.
 2922                  * 
 2923                  * We will need to allocate one and insert it at the head. The
 2924                  * socketopt call can just insert new addresses in there as
 2925                  * well. It will also have to do the embed scope kame hack
 2926                  * too (before adding).
 2927                  */
 2928                 struct sctp_ifa *ifa;
 2929                 struct sockaddr_storage store_sa;
 2930 
 2931                 memset(&store_sa, 0, sizeof(store_sa));
 2932                 if (addr->sa_family == AF_INET) {
 2933                         struct sockaddr_in *sin;
 2934 
 2935                         sin = (struct sockaddr_in *)&store_sa;
 2936                         memcpy(sin, addr, sizeof(struct sockaddr_in));
 2937                         sin->sin_port = 0;
 2938                 } else if (addr->sa_family == AF_INET6) {
 2939                         struct sockaddr_in6 *sin6;
 2940 
 2941                         sin6 = (struct sockaddr_in6 *)&store_sa;
 2942                         memcpy(sin6, addr, sizeof(struct sockaddr_in6));
 2943                         sin6->sin6_port = 0;
 2944                 }
 2945                 /*
 2946                  * first find the interface with the bound address need to
 2947                  * zero out the port to find the address! yuck! can't do
 2948                  * this earlier since need port for sctp_pcb_findep()
 2949                  */
 2950                 if (sctp_ifap != NULL)
 2951                         ifa = sctp_ifap;
 2952                 else {
 2953                         /*
 2954                          * Note for BSD we hit here always other O/S's will
 2955                          * pass things in via the sctp_ifap argument
 2956                          * (Panda).
 2957                          */
 2958                         ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa,
 2959                             vrf_id, SCTP_ADDR_NOT_LOCKED);
 2960                 }
 2961                 if (ifa == NULL) {
 2962                         /* Can't find an interface with that address */
 2963                         SCTP_INP_WUNLOCK(inp);
 2964                         SCTP_INP_INFO_WUNLOCK();
 2965                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL);
 2966                         return (EADDRNOTAVAIL);
 2967                 }
 2968                 if (addr->sa_family == AF_INET6) {
 2969                         /* GAK, more FIXME IFA lock? */
 2970                         if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
 2971                                 /* Can't bind a non-existent addr. */
 2972                                 SCTP_INP_WUNLOCK(inp);
 2973                                 SCTP_INP_INFO_WUNLOCK();
 2974                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
 2975                                 return (EINVAL);
 2976                         }
 2977                 }
 2978                 /* we're not bound all */
 2979                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
 2980                 /* allow bindx() to send ASCONF's for binding changes */
 2981                 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
 2982                 /* clear automatic addr changes from kernel flag */
 2983                 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
 2984 
 2985                 /* add this address to the endpoint list */
 2986                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0);
 2987                 if (error != 0) {
 2988                         SCTP_INP_WUNLOCK(inp);
 2989                         SCTP_INP_INFO_WUNLOCK();
 2990                         return (error);
 2991                 }
 2992                 inp->laddr_count++;
 2993         }
 2994         /* find the bucket */
 2995         if (port_reuse_active) {
 2996                 /* Put it into tcp 1-2-1 hash */
 2997                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport),
 2998                     SCTP_BASE_INFO(hashtcpmark))];
 2999                 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
 3000         } else {
 3001                 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
 3002                     SCTP_BASE_INFO(hashmark))];
 3003         }
 3004         /* put it in the bucket */
 3005         LIST_INSERT_HEAD(head, inp, sctp_hash);
 3006         SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n",
 3007             head, ntohs(lport), port_reuse_active);
 3008         /* set in the port */
 3009         inp->sctp_lport = lport;
 3010 
 3011         /* turn off just the unbound flag */
 3012         inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
 3013         SCTP_INP_WUNLOCK(inp);
 3014         SCTP_INP_INFO_WUNLOCK();
 3015         return (0);
 3016 }
 3017 
 3018 
 3019 static void
 3020 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp, struct sctp_inpcb *inp_next)
 3021 {
 3022         struct sctp_iterator *it;
 3023 
 3024         /*
 3025          * We enter with the only the ITERATOR_LOCK in place and a write
 3026          * lock on the inp_info stuff.
 3027          */
 3028 
 3029         /*
 3030          * Go through all iterators, we must do this since it is possible
 3031          * that some iterator does NOT have the lock, but is waiting for it.
 3032          * And the one that had the lock has either moved in the last
 3033          * iteration or we just cleared it above. We need to find all of
 3034          * those guys. The list of iterators should never be very big
 3035          * though.
 3036          */
 3037         TAILQ_FOREACH(it, &SCTP_BASE_INFO(iteratorhead), sctp_nxt_itr) {
 3038                 if (it == inp->inp_starting_point_for_iterator)
 3039                         /* skip this guy, he's special */
 3040                         continue;
 3041                 if (it->inp == inp) {
 3042                         /*
 3043                          * This is tricky and we DON'T lock the iterator.
 3044                          * Reason is he's running but waiting for me since
 3045                          * inp->inp_starting_point_for_iterator has the lock
 3046                          * on me (the guy above we skipped). This tells us
 3047                          * its is not running but waiting for
 3048                          * inp->inp_starting_point_for_iterator to be
 3049                          * released by the guy that does have our INP in a
 3050                          * lock.
 3051                          */
 3052                         if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
 3053                                 it->inp = NULL;
 3054                                 it->stcb = NULL;
 3055                         } else {
 3056                                 /* set him up to do the next guy not me */
 3057                                 it->inp = inp_next;
 3058                                 it->stcb = NULL;
 3059                         }
 3060                 }
 3061         }
 3062         it = inp->inp_starting_point_for_iterator;
 3063         if (it) {
 3064                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
 3065                         it->inp = NULL;
 3066                 } else {
 3067                         it->inp = inp_next;
 3068                 }
 3069                 it->stcb = NULL;
 3070         }
 3071 }
 3072 
 3073 /* release sctp_inpcb unbind the port */
 3074 void
 3075 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from)
 3076 {
 3077         /*
 3078          * Here we free a endpoint. We must find it (if it is in the Hash
 3079          * table) and remove it from there. Then we must also find it in the
 3080          * overall list and remove it from there. After all removals are
 3081          * complete then any timer has to be stopped. Then start the actual
 3082          * freeing. a) Any local lists. b) Any associations. c) The hash of
 3083          * all associations. d) finally the ep itself.
 3084          */
 3085         struct sctp_pcb *m;
 3086         struct sctp_inpcb *inp_save;
 3087         struct sctp_tcb *asoc, *nasoc;
 3088         struct sctp_laddr *laddr, *nladdr;
 3089         struct inpcb *ip_pcb;
 3090         struct socket *so;
 3091 
 3092         struct sctp_queued_to_read *sq;
 3093 
 3094 
 3095         int cnt;
 3096         sctp_sharedkey_t *shared_key;
 3097 
 3098 
 3099 #ifdef SCTP_LOG_CLOSING
 3100         sctp_log_closing(inp, NULL, 0);
 3101 #endif
 3102         SCTP_ITERATOR_LOCK();
 3103         so = inp->sctp_socket;
 3104         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
 3105                 /* been here before.. eeks.. get out of here */
 3106                 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate);
 3107                 SCTP_ITERATOR_UNLOCK();
 3108 #ifdef SCTP_LOG_CLOSING
 3109                 sctp_log_closing(inp, NULL, 1);
 3110 #endif
 3111                 return;
 3112         }
 3113         SCTP_ASOC_CREATE_LOCK(inp);
 3114         SCTP_INP_INFO_WLOCK();
 3115 
 3116         SCTP_INP_WLOCK(inp);
 3117         /* First time through we have the socket lock, after that no more. */
 3118         if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) {
 3119                 /*
 3120                  * Once we are in we can remove the flag from = 1 is only
 3121                  * passed from the actual closing routines that are called
 3122                  * via the sockets layer.
 3123                  */
 3124                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP;
 3125                 /* socket is gone, so no more wakeups allowed */
 3126                 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE;
 3127                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT;
 3128                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT;
 3129         }
 3130         sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL,
 3131             SCTP_FROM_SCTP_PCB + SCTP_LOC_1);
 3132 
 3133         if (inp->control) {
 3134                 sctp_m_freem(inp->control);
 3135                 inp->control = NULL;
 3136         }
 3137         if (inp->pkt) {
 3138                 sctp_m_freem(inp->pkt);
 3139                 inp->pkt = NULL;
 3140         }
 3141         m = &inp->sctp_ep;
 3142         ip_pcb = &inp->ip_inp.inp;      /* we could just cast the main pointer
 3143                                          * here but I will be nice :> (i.e.
 3144                                          * ip_pcb = ep;) */
 3145         if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
 3146                 int cnt_in_sd;
 3147 
 3148                 cnt_in_sd = 0;
 3149                 for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL;
 3150                     asoc = nasoc) {
 3151                         SCTP_TCB_LOCK(asoc);
 3152                         nasoc = LIST_NEXT(asoc, sctp_tcblist);
 3153                         if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
 3154                                 /* Skip guys being freed */
 3155                                 /* asoc->sctp_socket = NULL; FIXME MT */
 3156                                 cnt_in_sd++;
 3157                                 SCTP_TCB_UNLOCK(asoc);
 3158                                 continue;
 3159                         }
 3160                         if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) ||
 3161                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) &&
 3162                             (asoc->asoc.total_output_queue_size == 0)) {
 3163                                 /*
 3164                                  * If we have data in queue, we don't want
 3165                                  * to just free since the app may have done,
 3166                                  * send()/close or connect/send/close. And
 3167                                  * it wants the data to get across first.
 3168                                  */
 3169                                 /* Just abandon things in the front states */
 3170                                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE,
 3171                                     SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) {
 3172                                         cnt_in_sd++;
 3173                                 }
 3174                                 continue;
 3175                         }
 3176                         /* Disconnect the socket please */
 3177                         asoc->sctp_socket = NULL;
 3178                         asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET;
 3179                         if ((asoc->asoc.size_on_reasm_queue > 0) ||
 3180                             (asoc->asoc.control_pdapi) ||
 3181                             (asoc->asoc.size_on_all_streams > 0) ||
 3182                             (so && (so->so_rcv.sb_cc > 0))
 3183                             ) {
 3184                                 /* Left with Data unread */
 3185                                 struct mbuf *op_err;
 3186 
 3187                                 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
 3188                                     0, M_DONTWAIT, 1, MT_DATA);
 3189                                 if (op_err) {
 3190                                         /* Fill in the user initiated abort */
 3191                                         struct sctp_paramhdr *ph;
 3192                                         uint32_t *ippp;
 3193 
 3194                                         SCTP_BUF_LEN(op_err) =
 3195                                             sizeof(struct sctp_paramhdr) + sizeof(uint32_t);
 3196                                         ph = mtod(op_err,
 3197                                             struct sctp_paramhdr *);
 3198                                         ph->param_type = htons(
 3199                                             SCTP_CAUSE_USER_INITIATED_ABT);
 3200                                         ph->param_length = htons(SCTP_BUF_LEN(op_err));
 3201                                         ippp = (uint32_t *) (ph + 1);
 3202                                         *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_3);
 3203                                 }
 3204                                 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3;
 3205 #if defined(SCTP_PANIC_ON_ABORT)
 3206                                 panic("inpcb_free does an abort");
 3207 #endif
 3208                                 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
 3209                                 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
 3210                                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
 3211                                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
 3212                                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
 3213                                 }
 3214                                 if (sctp_free_assoc(inp, asoc,
 3215                                     SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) {
 3216                                         cnt_in_sd++;
 3217                                 }
 3218                                 continue;
 3219                         } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
 3220                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
 3221                                     (asoc->asoc.stream_queue_cnt == 0)
 3222                             ) {
 3223                                 if (asoc->asoc.locked_on_sending) {
 3224                                         goto abort_anyway;
 3225                                 }
 3226                                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
 3227                                     (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
 3228                                         /*
 3229                                          * there is nothing queued to send,
 3230                                          * so I send shutdown
 3231                                          */
 3232                                         sctp_send_shutdown(asoc, asoc->asoc.primary_destination);
 3233                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
 3234                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
 3235                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
 3236                                         }
 3237                                         SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT);
 3238                                         SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING);
 3239                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
 3240                                             asoc->asoc.primary_destination);
 3241                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
 3242                                             asoc->asoc.primary_destination);
 3243                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED);
 3244                                 }
 3245                         } else {
 3246                                 /* mark into shutdown pending */
 3247                                 struct sctp_stream_queue_pending *sp;
 3248 
 3249                                 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING;
 3250                                 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
 3251                                     asoc->asoc.primary_destination);
 3252                                 if (asoc->asoc.locked_on_sending) {
 3253                                         sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue),
 3254                                             sctp_streamhead);
 3255                                         if (sp == NULL) {
 3256                                                 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n",
 3257                                                     asoc->asoc.locked_on_sending,
 3258                                                     asoc->asoc.locked_on_sending->stream_no);
 3259                                         } else {
 3260                                                 if ((sp->length == 0) && (sp->msg_is_complete == 0))
 3261                                                         asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT;
 3262                                         }
 3263                                 }
 3264                                 if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
 3265                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
 3266                                     (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
 3267                                         struct mbuf *op_err;
 3268 
 3269                         abort_anyway:
 3270                                         op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
 3271                                             0, M_DONTWAIT, 1, MT_DATA);
 3272                                         if (op_err) {
 3273                                                 /*
 3274                                                  * Fill in the user
 3275                                                  * initiated abort
 3276                                                  */
 3277                                                 struct sctp_paramhdr *ph;
 3278                                                 uint32_t *ippp;
 3279 
 3280                                                 SCTP_BUF_LEN(op_err) =
 3281                                                     (sizeof(struct sctp_paramhdr) +
 3282                                                     sizeof(uint32_t));
 3283                                                 ph = mtod(op_err,
 3284                                                     struct sctp_paramhdr *);
 3285                                                 ph->param_type = htons(
 3286                                                     SCTP_CAUSE_USER_INITIATED_ABT);
 3287                                                 ph->param_length = htons(SCTP_BUF_LEN(op_err));
 3288                                                 ippp = (uint32_t *) (ph + 1);
 3289                                                 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_5);
 3290                                         }
 3291                                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5;
 3292 #if defined(SCTP_PANIC_ON_ABORT)
 3293                                         panic("inpcb_free does an abort");
 3294 #endif
 3295 
 3296                                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
 3297                                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
 3298                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
 3299                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
 3300                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
 3301                                         }
 3302                                         if (sctp_free_assoc(inp, asoc,
 3303                                             SCTP_PCBFREE_NOFORCE,
 3304                                             SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) {
 3305                                                 cnt_in_sd++;
 3306                                         }
 3307                                         continue;
 3308                                 } else {
 3309                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED);
 3310                                 }
 3311                         }
 3312                         cnt_in_sd++;
 3313                         SCTP_TCB_UNLOCK(asoc);
 3314                 }
 3315                 /* now is there some left in our SHUTDOWN state? */
 3316                 if (cnt_in_sd) {
 3317                         SCTP_INP_WUNLOCK(inp);
 3318                         SCTP_ASOC_CREATE_UNLOCK(inp);
 3319                         SCTP_INP_INFO_WUNLOCK();
 3320                         SCTP_ITERATOR_UNLOCK();
 3321 #ifdef SCTP_LOG_CLOSING
 3322                         sctp_log_closing(inp, NULL, 2);
 3323 #endif
 3324                         inp->sctp_socket = NULL;
 3325                         return;
 3326                 }
 3327         }
 3328         inp->sctp_socket = NULL;
 3329         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
 3330             SCTP_PCB_FLAGS_UNBOUND) {
 3331                 /*
 3332                  * ok, this guy has been bound. It's port is somewhere in
 3333                  * the SCTP_BASE_INFO(hash table). Remove it!
 3334                  */
 3335                 LIST_REMOVE(inp, sctp_hash);
 3336                 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND;
 3337         }
 3338         /*
 3339          * If there is a timer running to kill us, forget it, since it may
 3340          * have a contest on the INP lock.. which would cause us to die ...
 3341          */
 3342         cnt = 0;
 3343         for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL;
 3344             asoc = nasoc) {
 3345                 nasoc = LIST_NEXT(asoc, sctp_tcblist);
 3346                 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
 3347                         cnt++;
 3348                         continue;
 3349                 }
 3350                 /* Free associations that are NOT killing us */
 3351                 SCTP_TCB_LOCK(asoc);
 3352                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) &&
 3353                     ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) {
 3354                         struct mbuf *op_err;
 3355                         uint32_t *ippp;
 3356 
 3357                         op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
 3358                             0, M_DONTWAIT, 1, MT_DATA);
 3359                         if (op_err) {
 3360                                 /* Fill in the user initiated abort */
 3361                                 struct sctp_paramhdr *ph;
 3362 
 3363                                 SCTP_BUF_LEN(op_err) = (sizeof(struct sctp_paramhdr) +
 3364                                     sizeof(uint32_t));
 3365                                 ph = mtod(op_err, struct sctp_paramhdr *);
 3366                                 ph->param_type = htons(
 3367                                     SCTP_CAUSE_USER_INITIATED_ABT);
 3368                                 ph->param_length = htons(SCTP_BUF_LEN(op_err));
 3369                                 ippp = (uint32_t *) (ph + 1);
 3370                                 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_7);
 3371 
 3372                         }
 3373                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7;
 3374 #if defined(SCTP_PANIC_ON_ABORT)
 3375                         panic("inpcb_free does an abort");
 3376 #endif
 3377                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
 3378                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
 3379                 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
 3380                         cnt++;
 3381                         SCTP_TCB_UNLOCK(asoc);
 3382                         continue;
 3383                 }
 3384                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
 3385                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
 3386                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
 3387                 }
 3388                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) {
 3389                         cnt++;
 3390                 }
 3391         }
 3392         if (cnt) {
 3393                 /* Ok we have someone out there that will kill us */
 3394                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
 3395                 SCTP_INP_WUNLOCK(inp);
 3396                 SCTP_ASOC_CREATE_UNLOCK(inp);
 3397                 SCTP_INP_INFO_WUNLOCK();
 3398                 SCTP_ITERATOR_UNLOCK();
 3399 #ifdef SCTP_LOG_CLOSING
 3400                 sctp_log_closing(inp, NULL, 3);
 3401 #endif
 3402                 return;
 3403         }
 3404         if ((inp->refcount) || (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) {
 3405                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
 3406                 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
 3407                 SCTP_INP_WUNLOCK(inp);
 3408                 SCTP_ASOC_CREATE_UNLOCK(inp);
 3409                 SCTP_INP_INFO_WUNLOCK();
 3410                 SCTP_ITERATOR_UNLOCK();
 3411 #ifdef SCTP_LOG_CLOSING
 3412                 sctp_log_closing(inp, NULL, 4);
 3413 #endif
 3414                 return;
 3415         }
 3416         (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
 3417         inp->sctp_ep.signature_change.type = 0;
 3418         inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
 3419 
 3420 #ifdef SCTP_LOG_CLOSING
 3421         sctp_log_closing(inp, NULL, 5);
 3422 #endif
 3423 
 3424         (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
 3425         inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NONE;
 3426         /* Clear the read queue */
 3427         if ((inp->sctp_asocidhash) != NULL) {
 3428                 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark);
 3429                 inp->sctp_asocidhash = NULL;
 3430         }
 3431         /* sa_ignore FREED_MEMORY */
 3432         while ((sq = TAILQ_FIRST(&inp->read_queue)) != NULL) {
 3433                 /* Its only abandoned if it had data left */
 3434                 if (sq->length)
 3435                         SCTP_STAT_INCR(sctps_left_abandon);
 3436 
 3437                 TAILQ_REMOVE(&inp->read_queue, sq, next);
 3438                 sctp_free_remote_addr(sq->whoFrom);
 3439                 if (so)
 3440                         so->so_rcv.sb_cc -= sq->length;
 3441                 if (sq->data) {
 3442                         sctp_m_freem(sq->data);
 3443                         sq->data = NULL;
 3444                 }
 3445                 /*
 3446                  * no need to free the net count, since at this point all
 3447                  * assoc's are gone.
 3448                  */
 3449                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq);
 3450                 SCTP_DECR_READQ_COUNT();
 3451         }
 3452         /* Now the sctp_pcb things */
 3453         /*
 3454          * free each asoc if it is not already closed/free. we can't use the
 3455          * macro here since le_next will get freed as part of the
 3456          * sctp_free_assoc() call.
 3457          */
 3458         cnt = 0;
 3459         if (so) {
 3460 #ifdef IPSEC
 3461                 ipsec_delete_pcbpolicy(ip_pcb);
 3462 #endif                          /* IPSEC */
 3463 
 3464                 /* Unlocks not needed since the socket is gone now */
 3465         }
 3466         if (ip_pcb->inp_options) {
 3467                 (void)sctp_m_free(ip_pcb->inp_options);
 3468                 ip_pcb->inp_options = 0;
 3469         }
 3470         if (ip_pcb->inp_moptions) {
 3471                 inp_freemoptions(ip_pcb->inp_moptions);
 3472                 ip_pcb->inp_moptions = 0;
 3473         }
 3474 #ifdef INET6
 3475         if (ip_pcb->inp_vflag & INP_IPV6) {
 3476                 struct in6pcb *in6p;
 3477 
 3478                 in6p = (struct in6pcb *)inp;
 3479                 ip6_freepcbopts(in6p->in6p_outputopts);
 3480         }
 3481 #endif                          /* INET6 */
 3482         ip_pcb->inp_vflag = 0;
 3483         /* free up authentication fields */
 3484         if (inp->sctp_ep.local_auth_chunks != NULL)
 3485                 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
 3486         if (inp->sctp_ep.local_hmacs != NULL)
 3487                 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
 3488 
 3489         shared_key = LIST_FIRST(&inp->sctp_ep.shared_keys);
 3490         while (shared_key) {
 3491                 LIST_REMOVE(shared_key, next);
 3492                 sctp_free_sharedkey(shared_key);
 3493                 /* sa_ignore FREED_MEMORY */
 3494                 shared_key = LIST_FIRST(&inp->sctp_ep.shared_keys);
 3495         }
 3496 
 3497         inp_save = LIST_NEXT(inp, sctp_list);
 3498         LIST_REMOVE(inp, sctp_list);
 3499 
 3500         /* fix any iterators only after out of the list */
 3501         sctp_iterator_inp_being_freed(inp, inp_save);
 3502         /*
 3503          * if we have an address list the following will free the list of
 3504          * ifaddr's that are set into this ep. Again macro limitations here,
 3505          * since the LIST_FOREACH could be a bad idea.
 3506          */
 3507         for ((laddr = LIST_FIRST(&inp->sctp_addr_list)); laddr != NULL;
 3508             laddr = nladdr) {
 3509                 nladdr = LIST_NEXT(laddr, sctp_nxt_addr);
 3510                 sctp_remove_laddr(laddr);
 3511         }
 3512 
 3513 #ifdef SCTP_TRACK_FREED_ASOCS
 3514         /* TEMP CODE */
 3515         for ((asoc = LIST_FIRST(&inp->sctp_asoc_free_list)); asoc != NULL;
 3516             asoc = nasoc) {
 3517                 nasoc = LIST_NEXT(asoc, sctp_tcblist);
 3518                 LIST_REMOVE(asoc, sctp_tcblist);
 3519                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc);
 3520                 SCTP_DECR_ASOC_COUNT();
 3521         }
 3522         /* *** END TEMP CODE *** */
 3523 #endif
 3524         /* Now lets see about freeing the EP hash table. */
 3525         if (inp->sctp_tcbhash != NULL) {
 3526                 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
 3527                 inp->sctp_tcbhash = NULL;
 3528         }
 3529         /* Now we must put the ep memory back into the zone pool */
 3530         INP_LOCK_DESTROY(&inp->ip_inp.inp);
 3531         SCTP_INP_LOCK_DESTROY(inp);
 3532         SCTP_INP_READ_DESTROY(inp);
 3533         SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
 3534         SCTP_INP_INFO_WUNLOCK();
 3535         SCTP_ITERATOR_UNLOCK();
 3536         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
 3537         SCTP_DECR_EP_COUNT();
 3538 }
 3539 
 3540 
 3541 struct sctp_nets *
 3542 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
 3543 {
 3544         struct sctp_nets *net;
 3545 
 3546         /* locate the address */
 3547         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 3548                 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
 3549                         return (net);
 3550         }
 3551         return (NULL);
 3552 }
 3553 
 3554 
 3555 int
 3556 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id)
 3557 {
 3558         struct sctp_ifa *sctp_ifa;
 3559 
 3560         sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED);
 3561         if (sctp_ifa) {
 3562                 return (1);
 3563         } else {
 3564                 return (0);
 3565         }
 3566 }
 3567 
 3568 /*
 3569  * add's a remote endpoint address, done with the INIT/INIT-ACK as well as
 3570  * when a ASCONF arrives that adds it. It will also initialize all the cwnd
 3571  * stats of stuff.
 3572  */
 3573 int
 3574 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
 3575     int set_scope, int from)
 3576 {
 3577         /*
 3578          * The following is redundant to the same lines in the
 3579          * sctp_aloc_assoc() but is needed since other's call the add
 3580          * address function
 3581          */
 3582         struct sctp_nets *net, *netfirst;
 3583         int addr_inscope;
 3584 
 3585         SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ",
 3586             from);
 3587         SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr);
 3588 
 3589         netfirst = sctp_findnet(stcb, newaddr);
 3590         if (netfirst) {
 3591                 /*
 3592                  * Lie and return ok, we don't want to make the association
 3593                  * go away for this behavior. It will happen in the TCP
 3594                  * model in a connected socket. It does not reach the hash
 3595                  * table until after the association is built so it can't be
 3596                  * found. Mark as reachable, since the initial creation will
 3597                  * have been cleared and the NOT_IN_ASSOC flag will have
 3598                  * been added... and we don't want to end up removing it
 3599                  * back out.
 3600                  */
 3601                 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
 3602                         netfirst->dest_state = (SCTP_ADDR_REACHABLE |
 3603                             SCTP_ADDR_UNCONFIRMED);
 3604                 } else {
 3605                         netfirst->dest_state = SCTP_ADDR_REACHABLE;
 3606                 }
 3607 
 3608                 return (0);
 3609         }
 3610         addr_inscope = 1;
 3611         if (newaddr->sa_family == AF_INET) {
 3612                 struct sockaddr_in *sin;
 3613 
 3614                 sin = (struct sockaddr_in *)newaddr;
 3615                 if (sin->sin_addr.s_addr == 0) {
 3616                         /* Invalid address */
 3617                         return (-1);
 3618                 }
 3619                 /* zero out the bzero area */
 3620                 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
 3621 
 3622                 /* assure len is set */
 3623                 sin->sin_len = sizeof(struct sockaddr_in);
 3624                 if (set_scope) {
 3625 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE
 3626                         stcb->ipv4_local_scope = 1;
 3627 #else
 3628                         if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
 3629                                 stcb->asoc.ipv4_local_scope = 1;
 3630                         }
 3631 #endif                          /* SCTP_DONT_DO_PRIVADDR_SCOPE */
 3632                 } else {
 3633                         /* Validate the address is in scope */
 3634                         if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
 3635                             (stcb->asoc.ipv4_local_scope == 0)) {
 3636                                 addr_inscope = 0;
 3637                         }
 3638                 }
 3639 #ifdef INET6
 3640         } else if (newaddr->sa_family == AF_INET6) {
 3641                 struct sockaddr_in6 *sin6;
 3642 
 3643                 sin6 = (struct sockaddr_in6 *)newaddr;
 3644                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
 3645                         /* Invalid address */
 3646                         return (-1);
 3647                 }
 3648                 /* assure len is set */
 3649                 sin6->sin6_len = sizeof(struct sockaddr_in6);
 3650                 if (set_scope) {
 3651                         if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) {
 3652                                 stcb->asoc.loopback_scope = 1;
 3653                                 stcb->asoc.local_scope = 0;
 3654                                 stcb->asoc.ipv4_local_scope = 1;
 3655                                 stcb->asoc.site_scope = 1;
 3656                         } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
 3657                                 /*
 3658                                  * If the new destination is a LINK_LOCAL we
 3659                                  * must have common site scope. Don't set
 3660                                  * the local scope since we may not share
 3661                                  * all links, only loopback can do this.
 3662                                  * Links on the local network would also be
 3663                                  * on our private network for v4 too.
 3664                                  */
 3665                                 stcb->asoc.ipv4_local_scope = 1;
 3666                                 stcb->asoc.site_scope = 1;
 3667                         } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
 3668                                 /*
 3669                                  * If the new destination is SITE_LOCAL then
 3670                                  * we must have site scope in common.
 3671                                  */
 3672                                 stcb->asoc.site_scope = 1;
 3673                         }
 3674                 } else {
 3675                         /* Validate the address is in scope */
 3676                         if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
 3677                             (stcb->asoc.loopback_scope == 0)) {
 3678                                 addr_inscope = 0;
 3679                         } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
 3680                             (stcb->asoc.local_scope == 0)) {
 3681                                 addr_inscope = 0;
 3682                         } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
 3683                             (stcb->asoc.site_scope == 0)) {
 3684                                 addr_inscope = 0;
 3685                         }
 3686                 }
 3687 #endif
 3688         } else {
 3689                 /* not supported family type */
 3690                 return (-1);
 3691         }
 3692         net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets);
 3693         if (net == NULL) {
 3694                 return (-1);
 3695         }
 3696         SCTP_INCR_RADDR_COUNT();
 3697         bzero(net, sizeof(*net));
 3698         (void)SCTP_GETTIME_TIMEVAL(&net->start_time);
 3699         memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
 3700         if (newaddr->sa_family == AF_INET) {
 3701                 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
 3702         } else if (newaddr->sa_family == AF_INET6) {
 3703                 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
 3704         }
 3705         net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id);
 3706         if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) {
 3707                 stcb->asoc.loopback_scope = 1;
 3708                 stcb->asoc.ipv4_local_scope = 1;
 3709                 stcb->asoc.local_scope = 0;
 3710                 stcb->asoc.site_scope = 1;
 3711                 addr_inscope = 1;
 3712         }
 3713         net->failure_threshold = stcb->asoc.def_net_failure;
 3714         if (addr_inscope == 0) {
 3715                 net->dest_state = (SCTP_ADDR_REACHABLE |
 3716                     SCTP_ADDR_OUT_OF_SCOPE);
 3717         } else {
 3718                 if (from == SCTP_ADDR_IS_CONFIRMED)
 3719                         /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */
 3720                         net->dest_state = SCTP_ADDR_REACHABLE;
 3721                 else
 3722                         net->dest_state = SCTP_ADDR_REACHABLE |
 3723                             SCTP_ADDR_UNCONFIRMED;
 3724         }
 3725         /*
 3726          * We set this to 0, the timer code knows that this means its an
 3727          * initial value
 3728          */
 3729         net->RTO = 0;
 3730         net->RTO_measured = 0;
 3731         stcb->asoc.numnets++;
 3732         *(&net->ref_count) = 1;
 3733         net->tos_flowlabel = 0;
 3734         if (SCTP_BASE_SYSCTL(sctp_udp_tunneling_for_client_enable)) {
 3735                 net->port = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
 3736         } else {
 3737                 net->port = 0;
 3738         }
 3739 #ifdef INET
 3740         if (newaddr->sa_family == AF_INET)
 3741                 net->tos_flowlabel = stcb->asoc.default_tos;
 3742 #endif
 3743 #ifdef INET6
 3744         if (newaddr->sa_family == AF_INET6)
 3745                 net->tos_flowlabel = stcb->asoc.default_flowlabel;
 3746 #endif
 3747         /* Init the timer structure */
 3748         SCTP_OS_TIMER_INIT(&net->rxt_timer.timer);
 3749         SCTP_OS_TIMER_INIT(&net->fr_timer.timer);
 3750         SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer);
 3751 
 3752         /* Now generate a route for this guy */
 3753 #ifdef INET6
 3754         /* KAME hack: embed scopeid */
 3755         if (newaddr->sa_family == AF_INET6) {
 3756                 struct sockaddr_in6 *sin6;
 3757 
 3758                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
 3759                 (void)sa6_embedscope(sin6, MODULE_GLOBAL(MOD_INET6, ip6_use_defzone));
 3760                 sin6->sin6_scope_id = 0;
 3761         }
 3762 #endif
 3763         SCTP_RTALLOC((sctp_route_t *) & net->ro, stcb->asoc.vrf_id);
 3764 
 3765         if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) {
 3766                 /* Get source address */
 3767                 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep,
 3768                     stcb,
 3769                     (sctp_route_t *) & net->ro,
 3770                     net,
 3771                     0,
 3772                     stcb->asoc.vrf_id);
 3773                 /* Now get the interface MTU */
 3774                 if (net->ro._s_addr && net->ro._s_addr->ifn_p) {
 3775                         net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p);
 3776                 } else {
 3777                         net->mtu = 0;
 3778                 }
 3779 #ifdef SCTP_PRINT_FOR_B_AND_M
 3780                 SCTP_PRINTF("We have found an interface mtu of %d\n", net->mtu);
 3781 #endif
 3782                 if (net->mtu == 0) {
 3783                         /* Huh ?? */
 3784                         net->mtu = SCTP_DEFAULT_MTU;
 3785                 } else {
 3786                         uint32_t rmtu;
 3787 
 3788                         rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt);
 3789 #ifdef SCTP_PRINT_FOR_B_AND_M
 3790                         SCTP_PRINTF("The route mtu is %d\n", rmtu);
 3791 #endif
 3792                         if (rmtu == 0) {
 3793                                 /*
 3794                                  * Start things off to match mtu of
 3795                                  * interface please.
 3796                                  */
 3797                                 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa,
 3798                                     net->ro.ro_rt, net->mtu);
 3799                         } else {
 3800                                 /*
 3801                                  * we take the route mtu over the interface,
 3802                                  * since the route may be leading out the
 3803                                  * loopback, or a different interface.
 3804                                  */
 3805                                 net->mtu = rmtu;
 3806                         }
 3807                 }
 3808                 if (from == SCTP_ALLOC_ASOC) {
 3809 #ifdef SCTP_PRINT_FOR_B_AND_M
 3810                         SCTP_PRINTF("New assoc sets mtu to :%d\n", net->mtu);
 3811 #endif
 3812                         stcb->asoc.smallest_mtu = net->mtu;
 3813                 }
 3814         } else {
 3815                 net->mtu = stcb->asoc.smallest_mtu;
 3816         }
 3817 #ifdef INET6
 3818         if (newaddr->sa_family == AF_INET6) {
 3819                 struct sockaddr_in6 *sin6;
 3820 
 3821                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
 3822                 (void)sa6_recoverscope(sin6);
 3823         }
 3824 #endif
 3825         if (net->port) {
 3826                 net->mtu -= sizeof(struct udphdr);
 3827         }
 3828         if (stcb->asoc.smallest_mtu > net->mtu) {
 3829 #ifdef SCTP_PRINT_FOR_B_AND_M
 3830                 SCTP_PRINTF("new address mtu:%d smaller than smallest:%d\n",
 3831                     net->mtu, stcb->asoc.smallest_mtu);
 3832 #endif
 3833                 stcb->asoc.smallest_mtu = net->mtu;
 3834         }
 3835         /* JRS - Use the congestion control given in the CC module */
 3836         stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net);
 3837 
 3838         /*
 3839          * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning
 3840          * of assoc (2005/06/27, iyengar@cis.udel.edu)
 3841          */
 3842         net->find_pseudo_cumack = 1;
 3843         net->find_rtx_pseudo_cumack = 1;
 3844         net->src_addr_selected = 0;
 3845         netfirst = TAILQ_FIRST(&stcb->asoc.nets);
 3846         if (net->ro.ro_rt == NULL) {
 3847                 /* Since we have no route put it at the back */
 3848                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
 3849         } else if (netfirst == NULL) {
 3850                 /* We are the first one in the pool. */
 3851                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
 3852         } else if (netfirst->ro.ro_rt == NULL) {
 3853                 /*
 3854                  * First one has NO route. Place this one ahead of the first
 3855                  * one.
 3856                  */
 3857                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
 3858         } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) {
 3859                 /*
 3860                  * This one has a different interface than the one at the
 3861                  * top of the list. Place it ahead.
 3862                  */
 3863                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
 3864         } else {
 3865                 /*
 3866                  * Ok we have the same interface as the first one. Move
 3867                  * forward until we find either a) one with a NULL route...
 3868                  * insert ahead of that b) one with a different ifp.. insert
 3869                  * after that. c) end of the list.. insert at the tail.
 3870                  */
 3871                 struct sctp_nets *netlook;
 3872 
 3873                 do {
 3874                         netlook = TAILQ_NEXT(netfirst, sctp_next);
 3875                         if (netlook == NULL) {
 3876                                 /* End of the list */
 3877                                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
 3878                                 break;
 3879                         } else if (netlook->ro.ro_rt == NULL) {
 3880                                 /* next one has NO route */
 3881                                 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
 3882                                 break;
 3883                         } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) {
 3884                                 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
 3885                                     net, sctp_next);
 3886                                 break;
 3887                         }
 3888                         /* Shift forward */
 3889                         netfirst = netlook;
 3890                 } while (netlook != NULL);
 3891         }
 3892 
 3893         /* got to have a primary set */
 3894         if (stcb->asoc.primary_destination == 0) {
 3895                 stcb->asoc.primary_destination = net;
 3896         } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) &&
 3897                     (net->ro.ro_rt) &&
 3898             ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
 3899                 /* No route to current primary adopt new primary */
 3900                 stcb->asoc.primary_destination = net;
 3901         }
 3902         sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb,
 3903             net);
 3904         /* Validate primary is first */
 3905         net = TAILQ_FIRST(&stcb->asoc.nets);
 3906         if ((net != stcb->asoc.primary_destination) &&
 3907             (stcb->asoc.primary_destination)) {
 3908                 /*
 3909                  * first one on the list is NOT the primary sctp_cmpaddr()
 3910                  * is much more efficent if the primary is the first on the
 3911                  * list, make it so.
 3912                  */
 3913                 TAILQ_REMOVE(&stcb->asoc.nets,
 3914                     stcb->asoc.primary_destination, sctp_next);
 3915                 TAILQ_INSERT_HEAD(&stcb->asoc.nets,
 3916                     stcb->asoc.primary_destination, sctp_next);
 3917         }
 3918         return (0);
 3919 }
 3920 
 3921 
 3922 static uint32_t
 3923 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
 3924 {
 3925         uint32_t id;
 3926         struct sctpasochead *head;
 3927         struct sctp_tcb *lstcb;
 3928 
 3929         SCTP_INP_WLOCK(inp);
 3930 try_again:
 3931         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
 3932                 /* TSNH */
 3933                 SCTP_INP_WUNLOCK(inp);
 3934                 return (0);
 3935         }
 3936         /*
 3937          * We don't allow assoc id to be 0, this is needed otherwise if the
 3938          * id were to wrap we would have issues with some socket options.
 3939          */
 3940         if (inp->sctp_associd_counter == 0) {
 3941                 inp->sctp_associd_counter++;
 3942         }
 3943         id = inp->sctp_associd_counter;
 3944         inp->sctp_associd_counter++;
 3945         lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t) id, 0);
 3946         if (lstcb) {
 3947                 goto try_again;
 3948         }
 3949         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
 3950         LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash);
 3951         stcb->asoc.in_asocid_hash = 1;
 3952         SCTP_INP_WUNLOCK(inp);
 3953         return id;
 3954 }
 3955 
 3956 /*
 3957  * allocate an association and add it to the endpoint. The caller must be
 3958  * careful to add all additional addresses once they are know right away or
 3959  * else the assoc will be may experience a blackout scenario.
 3960  */
 3961 struct sctp_tcb *
 3962 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
 3963     int for_a_init, int *error, uint32_t override_tag, uint32_t vrf_id,
 3964     struct thread *p
 3965 )
 3966 {
 3967         /* note the p argument is only valid in unbound sockets */
 3968 
 3969         struct sctp_tcb *stcb;
 3970         struct sctp_association *asoc;
 3971         struct sctpasochead *head;
 3972         uint16_t rport;
 3973         int err;
 3974 
 3975         /*
 3976          * Assumption made here: Caller has done a
 3977          * sctp_findassociation_ep_addr(ep, addr's); to make sure the
 3978          * address does not exist already.
 3979          */
 3980         if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) {
 3981                 /* Hit max assoc, sorry no more */
 3982                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
 3983                 *error = ENOBUFS;
 3984                 return (NULL);
 3985         }
 3986         if (firstaddr == NULL) {
 3987                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
 3988                 *error = EINVAL;
 3989                 return (NULL);
 3990         }
 3991         SCTP_INP_RLOCK(inp);
 3992         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) &&
 3993             ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) ||
 3994             (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) {
 3995                 /*
 3996                  * If its in the TCP pool, its NOT allowed to create an
 3997                  * association. The parent listener needs to call
 3998                  * sctp_aloc_assoc.. or the one-2-many socket. If a peeled
 3999                  * off, or connected one does this.. its an error.
 4000                  */
 4001                 SCTP_INP_RUNLOCK(inp);
 4002                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
 4003                 *error = EINVAL;
 4004                 return (NULL);
 4005         }
 4006         SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:");
 4007 #ifdef SCTP_DEBUG
 4008         if (firstaddr) {
 4009                 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr);
 4010                 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
 4011                     ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
 4012         } else {
 4013                 SCTPDBG(SCTP_DEBUG_PCB3, "None\n");
 4014         }
 4015 #endif                          /* SCTP_DEBUG */
 4016         if (firstaddr->sa_family == AF_INET) {
 4017                 struct sockaddr_in *sin;
 4018 
 4019                 sin = (struct sockaddr_in *)firstaddr;
 4020                 if ((sin->sin_port == 0) || (sin->sin_addr.s_addr == 0)) {
 4021                         /* Invalid address */
 4022                         SCTP_INP_RUNLOCK(inp);
 4023                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
 4024                         *error = EINVAL;
 4025                         return (NULL);
 4026                 }
 4027                 rport = sin->sin_port;
 4028         } else if (firstaddr->sa_family == AF_INET6) {
 4029                 struct sockaddr_in6 *sin6;
 4030 
 4031                 sin6 = (struct sockaddr_in6 *)firstaddr;
 4032                 if ((sin6->sin6_port == 0) ||
 4033                     (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) {
 4034                         /* Invalid address */
 4035                         SCTP_INP_RUNLOCK(inp);
 4036                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
 4037                         *error = EINVAL;
 4038                         return (NULL);
 4039                 }
 4040                 rport = sin6->sin6_port;
 4041         } else {
 4042                 /* not supported family type */
 4043                 SCTP_INP_RUNLOCK(inp);
 4044                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
 4045                 *error = EINVAL;
 4046                 return (NULL);
 4047         }
 4048         SCTP_INP_RUNLOCK(inp);
 4049         if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
 4050                 /*
 4051                  * If you have not performed a bind, then we need to do the
 4052                  * ephemerial bind for you.
 4053                  */
 4054                 if ((err = sctp_inpcb_bind(inp->sctp_socket,
 4055                     (struct sockaddr *)NULL,
 4056                     (struct sctp_ifa *)NULL,
 4057                     p
 4058                     ))) {
 4059                         /* bind error, probably perm */
 4060                         *error = err;
 4061                         return (NULL);
 4062                 }
 4063         }
 4064         stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb);
 4065         if (stcb == NULL) {
 4066                 /* out of memory? */
 4067                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
 4068                 *error = ENOMEM;
 4069                 return (NULL);
 4070         }
 4071         SCTP_INCR_ASOC_COUNT();
 4072 
 4073         bzero(stcb, sizeof(*stcb));
 4074         asoc = &stcb->asoc;
 4075 
 4076         asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb);
 4077         SCTP_TCB_LOCK_INIT(stcb);
 4078         SCTP_TCB_SEND_LOCK_INIT(stcb);
 4079         stcb->rport = rport;
 4080         /* setup back pointer's */
 4081         stcb->sctp_ep = inp;
 4082         stcb->sctp_socket = inp->sctp_socket;
 4083         if ((err = sctp_init_asoc(inp, stcb, for_a_init, override_tag, vrf_id))) {
 4084                 /* failed */
 4085                 SCTP_TCB_LOCK_DESTROY(stcb);
 4086                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
 4087                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
 4088                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
 4089                 SCTP_DECR_ASOC_COUNT();
 4090                 *error = err;
 4091                 return (NULL);
 4092         }
 4093         /* and the port */
 4094         SCTP_INP_INFO_WLOCK();
 4095         SCTP_INP_WLOCK(inp);
 4096         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
 4097                 /* inpcb freed while alloc going on */
 4098                 SCTP_TCB_LOCK_DESTROY(stcb);
 4099                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
 4100                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
 4101                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
 4102                 SCTP_INP_WUNLOCK(inp);
 4103                 SCTP_INP_INFO_WUNLOCK();
 4104                 SCTP_DECR_ASOC_COUNT();
 4105                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
 4106                 *error = EINVAL;
 4107                 return (NULL);
 4108         }
 4109         SCTP_TCB_LOCK(stcb);
 4110 
 4111         /* now that my_vtag is set, add it to the hash */
 4112         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
 4113         /* put it in the bucket in the vtag hash of assoc's for the system */
 4114         LIST_INSERT_HEAD(head, stcb, sctp_asocs);
 4115         SCTP_INP_INFO_WUNLOCK();
 4116 
 4117         if ((err = sctp_add_remote_addr(stcb, firstaddr, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) {
 4118                 /* failure.. memory error? */
 4119                 if (asoc->strmout) {
 4120                         SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
 4121                         asoc->strmout = NULL;
 4122                 }
 4123                 if (asoc->mapping_array) {
 4124                         SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
 4125                         asoc->mapping_array = NULL;
 4126                 }
 4127                 if (asoc->nr_mapping_array) {
 4128                         SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
 4129                         asoc->nr_mapping_array = NULL;
 4130                 }
 4131                 SCTP_DECR_ASOC_COUNT();
 4132                 SCTP_TCB_LOCK_DESTROY(stcb);
 4133                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
 4134                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
 4135                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
 4136                 SCTP_INP_WUNLOCK(inp);
 4137                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
 4138                 *error = ENOBUFS;
 4139                 return (NULL);
 4140         }
 4141         /* Init all the timers */
 4142         SCTP_OS_TIMER_INIT(&asoc->hb_timer.timer);
 4143         SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer);
 4144         SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer);
 4145         SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer);
 4146         SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer);
 4147         SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer);
 4148         SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer);
 4149         SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer);
 4150 
 4151         LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
 4152         /* now file the port under the hash as well */
 4153         if (inp->sctp_tcbhash != NULL) {
 4154                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
 4155                     inp->sctp_hashmark)];
 4156                 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
 4157         }
 4158         SCTP_INP_WUNLOCK(inp);
 4159         SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", stcb);
 4160         return (stcb);
 4161 }
 4162 
 4163 
 4164 void
 4165 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net)
 4166 {
 4167         struct sctp_association *asoc;
 4168 
 4169         asoc = &stcb->asoc;
 4170         asoc->numnets--;
 4171         TAILQ_REMOVE(&asoc->nets, net, sctp_next);
 4172         if (net == asoc->primary_destination) {
 4173                 /* Reset primary */
 4174                 struct sctp_nets *lnet;
 4175 
 4176                 lnet = TAILQ_FIRST(&asoc->nets);
 4177                 /*
 4178                  * Mobility adaptation Ideally, if deleted destination is
 4179                  * the primary, it becomes a fast retransmission trigger by
 4180                  * the subsequent SET PRIMARY. (by micchie)
 4181                  */
 4182                 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
 4183                     SCTP_MOBILITY_BASE) ||
 4184                     sctp_is_mobility_feature_on(stcb->sctp_ep,
 4185                     SCTP_MOBILITY_FASTHANDOFF)) {
 4186                         SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n");
 4187                         if (asoc->deleted_primary != NULL) {
 4188                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n");
 4189                                 goto out;
 4190                         }
 4191                         asoc->deleted_primary = net;
 4192                         atomic_add_int(&net->ref_count, 1);
 4193                         memset(&net->lastsa, 0, sizeof(net->lastsa));
 4194                         memset(&net->lastsv, 0, sizeof(net->lastsv));
 4195                         sctp_mobility_feature_on(stcb->sctp_ep,
 4196                             SCTP_MOBILITY_PRIM_DELETED);
 4197                         sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED,
 4198                             stcb->sctp_ep, stcb, NULL);
 4199                 }
 4200 out:
 4201                 /* Try to find a confirmed primary */
 4202                 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0);
 4203         }
 4204         if (net == asoc->last_data_chunk_from) {
 4205                 /* Reset primary */
 4206                 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets);
 4207         }
 4208         if (net == asoc->last_control_chunk_from) {
 4209                 /* Clear net */
 4210                 asoc->last_control_chunk_from = NULL;
 4211         }
 4212         sctp_free_remote_addr(net);
 4213 }
 4214 
 4215 /*
 4216  * remove a remote endpoint address from an association, it will fail if the
 4217  * address does not exist.
 4218  */
 4219 int
 4220 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
 4221 {
 4222         /*
 4223          * Here we need to remove a remote address. This is quite simple, we
 4224          * first find it in the list of address for the association
 4225          * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE
 4226          * on that item. Note we do not allow it to be removed if there are
 4227          * no other addresses.
 4228          */
 4229         struct sctp_association *asoc;
 4230         struct sctp_nets *net, *net_tmp;
 4231 
 4232         asoc = &stcb->asoc;
 4233 
 4234         /* locate the address */
 4235         for (net = TAILQ_FIRST(&asoc->nets); net != NULL; net = net_tmp) {
 4236                 net_tmp = TAILQ_NEXT(net, sctp_next);
 4237                 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
 4238                         continue;
 4239                 }
 4240                 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
 4241                     remaddr)) {
 4242                         /* we found the guy */
 4243                         if (asoc->numnets < 2) {
 4244                                 /* Must have at LEAST two remote addresses */
 4245                                 return (-1);
 4246                         } else {
 4247                                 sctp_remove_net(stcb, net);
 4248                                 return (0);
 4249                         }
 4250                 }
 4251         }
 4252         /* not found. */
 4253         return (-2);
 4254 }
 4255 
 4256 void
 4257 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
 4258 {
 4259         struct sctpvtaghead *chain;
 4260         struct sctp_tagblock *twait_block;
 4261         int found = 0;
 4262         int i;
 4263 
 4264         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
 4265         if (!SCTP_LIST_EMPTY(chain)) {
 4266                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
 4267                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
 4268                                 if ((twait_block->vtag_block[i].v_tag == tag) &&
 4269                                     (twait_block->vtag_block[i].lport == lport) &&
 4270                                     (twait_block->vtag_block[i].rport == rport)) {
 4271                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
 4272                                         twait_block->vtag_block[i].v_tag = 0;
 4273                                         twait_block->vtag_block[i].lport = 0;
 4274                                         twait_block->vtag_block[i].rport = 0;
 4275                                         found = 1;
 4276                                         break;
 4277                                 }
 4278                         }
 4279                         if (found)
 4280                                 break;
 4281                 }
 4282         }
 4283 }
 4284 
 4285 int
 4286 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
 4287 {
 4288         struct sctpvtaghead *chain;
 4289         struct sctp_tagblock *twait_block;
 4290         int found = 0;
 4291         int i;
 4292 
 4293         SCTP_INP_INFO_WLOCK();
 4294         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
 4295         if (!SCTP_LIST_EMPTY(chain)) {
 4296                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
 4297                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
 4298                                 if ((twait_block->vtag_block[i].v_tag == tag) &&
 4299                                     (twait_block->vtag_block[i].lport == lport) &&
 4300                                     (twait_block->vtag_block[i].rport == rport)) {
 4301                                         found = 1;
 4302                                         break;
 4303                                 }
 4304                         }
 4305                         if (found)
 4306                                 break;
 4307                 }
 4308         }
 4309         SCTP_INP_INFO_WUNLOCK();
 4310         return (found);
 4311 }
 4312 
 4313 
 4314 void
 4315 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport)
 4316 {
 4317         struct sctpvtaghead *chain;
 4318         struct sctp_tagblock *twait_block;
 4319         struct timeval now;
 4320         int set, i;
 4321 
 4322         if (time == 0) {
 4323                 /* Its disabled */
 4324                 return;
 4325         }
 4326         (void)SCTP_GETTIME_TIMEVAL(&now);
 4327         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
 4328         set = 0;
 4329         if (!SCTP_LIST_EMPTY(chain)) {
 4330                 /* Block(s) present, lets find space, and expire on the fly */
 4331                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
 4332                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
 4333                                 if ((twait_block->vtag_block[i].v_tag == 0) &&
 4334                                     !set) {
 4335                                         twait_block->vtag_block[i].tv_sec_at_expire =
 4336                                             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                                 } else if ((twait_block->vtag_block[i].v_tag) &&
 4342                                     ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) {
 4343                                         /* Audit expires this guy */
 4344                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
 4345                                         twait_block->vtag_block[i].v_tag = 0;
 4346                                         twait_block->vtag_block[i].lport = 0;
 4347                                         twait_block->vtag_block[i].rport = 0;
 4348                                         if (set == 0) {
 4349                                                 /* Reuse it for my new tag */
 4350                                                 twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time;
 4351                                                 twait_block->vtag_block[i].v_tag = tag;
 4352                                                 twait_block->vtag_block[i].lport = lport;
 4353                                                 twait_block->vtag_block[i].rport = rport;
 4354                                                 set = 1;
 4355                                         }
 4356                                 }
 4357                         }
 4358                         if (set) {
 4359                                 /*
 4360                                  * We only do up to the block where we can
 4361                                  * place our tag for audits
 4362                                  */
 4363                                 break;
 4364                         }
 4365                 }
 4366         }
 4367         /* Need to add a new block to chain */
 4368         if (!set) {
 4369                 SCTP_MALLOC(twait_block, struct sctp_tagblock *,
 4370                     sizeof(struct sctp_tagblock), SCTP_M_TIMW);
 4371                 if (twait_block == NULL) {
 4372 #ifdef INVARIANTS
 4373                         panic("Can not alloc tagblock");
 4374 #endif
 4375                         return;
 4376                 }
 4377                 memset(twait_block, 0, sizeof(struct sctp_tagblock));
 4378                 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
 4379                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time;
 4380                 twait_block->vtag_block[0].v_tag = tag;
 4381                 twait_block->vtag_block[0].lport = lport;
 4382                 twait_block->vtag_block[0].rport = rport;
 4383         }
 4384 }
 4385 
 4386 
 4387 static void
 4388 sctp_iterator_asoc_being_freed(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
 4389 {
 4390         struct sctp_iterator *it;
 4391 
 4392         /*
 4393          * Unlock the tcb lock we do this so we avoid a dead lock scenario
 4394          * where the iterator is waiting on the TCB lock and the TCB lock is
 4395          * waiting on the iterator lock.
 4396          */
 4397         it = stcb->asoc.stcb_starting_point_for_iterator;
 4398         if (it == NULL) {
 4399                 return;
 4400         }
 4401         if (it->inp != stcb->sctp_ep) {
 4402                 /* hmm, focused on the wrong one? */
 4403                 return;
 4404         }
 4405         if (it->stcb != stcb) {
 4406                 return;
 4407         }
 4408         it->stcb = LIST_NEXT(stcb, sctp_tcblist);
 4409         if (it->stcb == NULL) {
 4410                 /* done with all asoc's in this assoc */
 4411                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
 4412                         it->inp = NULL;
 4413                 } else {
 4414                         it->inp = LIST_NEXT(inp, sctp_list);
 4415                 }
 4416         }
 4417 }
 4418 
 4419 
 4420 /*-
 4421  * Free the association after un-hashing the remote port. This
 4422  * function ALWAYS returns holding NO LOCK on the stcb. It DOES
 4423  * expect that the input to this function IS a locked TCB.
 4424  * It will return 0, if it did NOT destroy the association (instead
 4425  * it unlocks it. It will return NON-zero if it either destroyed the
 4426  * association OR the association is already destroyed.
 4427  */
 4428 int
 4429 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location)
 4430 {
 4431         int i;
 4432         struct sctp_association *asoc;
 4433         struct sctp_nets *net, *prev;
 4434         struct sctp_laddr *laddr;
 4435         struct sctp_tmit_chunk *chk;
 4436         struct sctp_asconf_addr *aparam;
 4437         struct sctp_asconf_ack *aack;
 4438         struct sctp_stream_reset_list *liste;
 4439         struct sctp_queued_to_read *sq;
 4440         struct sctp_stream_queue_pending *sp;
 4441         sctp_sharedkey_t *shared_key;
 4442         struct socket *so;
 4443         int ccnt = 0;
 4444         int cnt = 0;
 4445 
 4446         /* first, lets purge the entry from the hash table. */
 4447 
 4448 #ifdef SCTP_LOG_CLOSING
 4449         sctp_log_closing(inp, stcb, 6);
 4450 #endif
 4451         if (stcb->asoc.state == 0) {
 4452 #ifdef SCTP_LOG_CLOSING
 4453                 sctp_log_closing(inp, NULL, 7);
 4454 #endif
 4455                 /* there is no asoc, really TSNH :-0 */
 4456                 return (1);
 4457         }
 4458         /* TEMP CODE */
 4459         if (stcb->freed_from_where == 0) {
 4460                 /* Only record the first place free happened from */
 4461                 stcb->freed_from_where = from_location;
 4462         }
 4463         /* TEMP CODE */
 4464 
 4465         asoc = &stcb->asoc;
 4466         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
 4467             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
 4468                 /* nothing around */
 4469                 so = NULL;
 4470         else
 4471                 so = inp->sctp_socket;
 4472 
 4473         /*
 4474          * We used timer based freeing if a reader or writer is in the way.
 4475          * So we first check if we are actually being called from a timer,
 4476          * if so we abort early if a reader or writer is still in the way.
 4477          */
 4478         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
 4479             (from_inpcbfree == SCTP_NORMAL_PROC)) {
 4480                 /*
 4481                  * is it the timer driving us? if so are the reader/writers
 4482                  * gone?
 4483                  */
 4484                 if (stcb->asoc.refcnt) {
 4485                         /* nope, reader or writer in the way */
 4486                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
 4487                         /* no asoc destroyed */
 4488                         SCTP_TCB_UNLOCK(stcb);
 4489 #ifdef SCTP_LOG_CLOSING
 4490                         sctp_log_closing(inp, stcb, 8);
 4491 #endif
 4492                         return (0);
 4493                 }
 4494         }
 4495         /* now clean up any other timers */
 4496         (void)SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer);
 4497         asoc->hb_timer.self = NULL;
 4498         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
 4499         asoc->dack_timer.self = NULL;
 4500         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
 4501         /*-
 4502          * For stream reset we don't blast this unless
 4503          * it is a str-reset timer, it might be the
 4504          * free-asoc timer which we DON'T want to
 4505          * disturb.
 4506          */
 4507         if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET)
 4508                 asoc->strreset_timer.self = NULL;
 4509         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
 4510         asoc->asconf_timer.self = NULL;
 4511         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
 4512         asoc->autoclose_timer.self = NULL;
 4513         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
 4514         asoc->shut_guard_timer.self = NULL;
 4515         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
 4516         asoc->delayed_event_timer.self = NULL;
 4517         /* Mobility adaptation */
 4518         (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer);
 4519         asoc->delete_prim_timer.self = NULL;
 4520         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
 4521                 (void)SCTP_OS_TIMER_STOP(&net->fr_timer.timer);
 4522                 net->fr_timer.self = NULL;
 4523                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
 4524                 net->rxt_timer.self = NULL;
 4525                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
 4526                 net->pmtu_timer.self = NULL;
 4527         }
 4528         /* Now the read queue needs to be cleaned up (only once) */
 4529         cnt = 0;
 4530         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) {
 4531                 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED;
 4532                 SCTP_INP_READ_LOCK(inp);
 4533                 TAILQ_FOREACH(sq, &inp->read_queue, next) {
 4534                         if (sq->stcb == stcb) {
 4535                                 sq->do_not_ref_stcb = 1;
 4536                                 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
 4537                                 /*
 4538                                  * If there is no end, there never will be
 4539                                  * now.
 4540                                  */
 4541                                 if (sq->end_added == 0) {
 4542                                         /* Held for PD-API clear that. */
 4543                                         sq->pdapi_aborted = 1;
 4544                                         sq->held_length = 0;
 4545                                         if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) {
 4546                                                 /*
 4547                                                  * Need to add a PD-API
 4548                                                  * aborted indication.
 4549                                                  * Setting the control_pdapi
 4550                                                  * assures that it will be
 4551                                                  * added right after this
 4552                                                  * msg.
 4553                                                  */
 4554                                                 uint32_t strseq;
 4555 
 4556                                                 stcb->asoc.control_pdapi = sq;
 4557                                                 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn;
 4558                                                 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION,
 4559                                                     stcb,
 4560                                                     SCTP_PARTIAL_DELIVERY_ABORTED,
 4561                                                     (void *)&strseq,
 4562                                                     SCTP_SO_LOCKED);
 4563                                                 stcb->asoc.control_pdapi = NULL;
 4564                                         }
 4565                                 }
 4566                                 /* Add an end to wake them */
 4567                                 sq->end_added = 1;
 4568                                 cnt++;
 4569                         }
 4570                 }
 4571                 SCTP_INP_READ_UNLOCK(inp);
 4572                 if (stcb->block_entry) {
 4573                         cnt++;
 4574                         SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET);
 4575                         stcb->block_entry->error = ECONNRESET;
 4576                         stcb->block_entry = NULL;
 4577                 }
 4578         }
 4579         if (stcb->asoc.refcnt) {
 4580                 /*
 4581                  * reader or writer in the way, we have hopefully given him
 4582                  * something to chew on above.
 4583                  */
 4584                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
 4585                 SCTP_TCB_UNLOCK(stcb);
 4586                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
 4587                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
 4588                         /* nothing around */
 4589                         so = NULL;
 4590                 if (so) {
 4591                         /* Wake any reader/writers */
 4592                         sctp_sorwakeup(inp, so);
 4593                         sctp_sowwakeup(inp, so);
 4594                 }
 4595 #ifdef SCTP_LOG_CLOSING
 4596                 sctp_log_closing(inp, stcb, 9);
 4597 #endif
 4598                 /* no asoc destroyed */
 4599                 return (0);
 4600         }
 4601 #ifdef SCTP_LOG_CLOSING
 4602         sctp_log_closing(inp, stcb, 10);
 4603 #endif
 4604         /*
 4605          * When I reach here, no others want to kill the assoc yet.. and I
 4606          * own the lock. Now its possible an abort comes in when I do the
 4607          * lock exchange below to grab all the locks to do the final take
 4608          * out. to prevent this we increment the count, which will start a
 4609          * timer and blow out above thus assuring us that we hold exclusive
 4610          * killing of the asoc. Note that after getting back the TCB lock we
 4611          * will go ahead and increment the counter back up and stop any
 4612          * timer a passing stranger may have started :-S
 4613          */
 4614         if (from_inpcbfree == SCTP_NORMAL_PROC) {
 4615                 atomic_add_int(&stcb->asoc.refcnt, 1);
 4616 
 4617                 SCTP_TCB_UNLOCK(stcb);
 4618 
 4619                 SCTP_ITERATOR_LOCK();
 4620                 SCTP_INP_INFO_WLOCK();
 4621                 SCTP_INP_WLOCK(inp);
 4622                 SCTP_TCB_LOCK(stcb);
 4623         }
 4624         /* Double check the GONE flag */
 4625         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
 4626             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
 4627                 /* nothing around */
 4628                 so = NULL;
 4629 
 4630         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
 4631             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
 4632                 /*
 4633                  * For TCP type we need special handling when we are
 4634                  * connected. We also include the peel'ed off ones to.
 4635                  */
 4636                 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
 4637                         inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
 4638                         inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED;
 4639                         if (so) {
 4640                                 SOCK_LOCK(so);
 4641                                 if (so->so_rcv.sb_cc == 0) {
 4642                                         so->so_state &= ~(SS_ISCONNECTING |
 4643                                             SS_ISDISCONNECTING |
 4644                                             SS_ISCONFIRMING |
 4645                                             SS_ISCONNECTED);
 4646                                 }
 4647                                 SOCK_UNLOCK(so);
 4648                                 socantrcvmore(so);
 4649                                 sctp_sowwakeup(inp, so);
 4650                                 sctp_sorwakeup(inp, so);
 4651                                 SCTP_SOWAKEUP(so);
 4652                         }
 4653                 }
 4654         }
 4655         /*
 4656          * Make it invalid too, that way if its about to run it will abort
 4657          * and return.
 4658          */
 4659         sctp_iterator_asoc_being_freed(inp, stcb);
 4660         /* re-increment the lock */
 4661         if (from_inpcbfree == SCTP_NORMAL_PROC) {
 4662                 atomic_add_int(&stcb->asoc.refcnt, -1);
 4663         }
 4664         asoc->state = 0;
 4665         if (inp->sctp_tcbhash) {
 4666                 LIST_REMOVE(stcb, sctp_tcbhash);
 4667         }
 4668         if (stcb->asoc.in_asocid_hash) {
 4669                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
 4670         }
 4671         /* Now lets remove it from the list of ALL associations in the EP */
 4672         LIST_REMOVE(stcb, sctp_tcblist);
 4673         if (from_inpcbfree == SCTP_NORMAL_PROC) {
 4674                 SCTP_INP_INCR_REF(inp);
 4675                 SCTP_INP_WUNLOCK(inp);
 4676                 SCTP_ITERATOR_UNLOCK();
 4677         }
 4678         /* pull from vtag hash */
 4679         LIST_REMOVE(stcb, sctp_asocs);
 4680         sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait),
 4681             inp->sctp_lport, stcb->rport);
 4682 
 4683         /*
 4684          * Now restop the timers to be sure - this is paranoia at is finest!
 4685          */
 4686         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
 4687         (void)SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer);
 4688         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
 4689         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
 4690         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
 4691         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
 4692         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
 4693         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
 4694         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
 4695                 (void)SCTP_OS_TIMER_STOP(&net->fr_timer.timer);
 4696                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
 4697                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
 4698         }
 4699 
 4700         asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE;
 4701         prev = NULL;
 4702         /*
 4703          * The chunk lists and such SHOULD be empty but we check them just
 4704          * in case.
 4705          */
 4706         /* anything on the wheel needs to be removed */
 4707         for (i = 0; i < asoc->streamoutcnt; i++) {
 4708                 struct sctp_stream_out *outs;
 4709 
 4710                 outs = &asoc->strmout[i];
 4711                 /* now clean up any chunks here */
 4712                 sp = TAILQ_FIRST(&outs->outqueue);
 4713                 while (sp) {
 4714                         TAILQ_REMOVE(&outs->outqueue, sp, next);
 4715                         if (sp->data) {
 4716                                 sctp_m_freem(sp->data);
 4717                                 sp->data = NULL;
 4718                                 sp->tail_mbuf = NULL;
 4719                         }
 4720                         sctp_free_remote_addr(sp->net);
 4721                         sctp_free_spbufspace(stcb, asoc, sp);
 4722                         if (sp->holds_key_ref)
 4723                                 sctp_auth_key_release(stcb, sp->auth_keyid);
 4724                         /* Free the zone stuff  */
 4725                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_strmoq), sp);
 4726                         SCTP_DECR_STRMOQ_COUNT();
 4727                         /* sa_ignore FREED_MEMORY */
 4728                         sp = TAILQ_FIRST(&outs->outqueue);
 4729                 }
 4730         }
 4731 
 4732         /* sa_ignore FREED_MEMORY */
 4733         while ((liste = TAILQ_FIRST(&asoc->resetHead)) != NULL) {
 4734                 TAILQ_REMOVE(&asoc->resetHead, liste, next_resp);
 4735                 SCTP_FREE(liste, SCTP_M_STRESET);
 4736         }
 4737 
 4738         sq = TAILQ_FIRST(&asoc->pending_reply_queue);
 4739         while (sq) {
 4740                 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
 4741                 if (sq->data) {
 4742                         sctp_m_freem(sq->data);
 4743                         sq->data = NULL;
 4744                 }
 4745                 sctp_free_remote_addr(sq->whoFrom);
 4746                 sq->whoFrom = NULL;
 4747                 sq->stcb = NULL;
 4748                 /* Free the ctl entry */
 4749                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq);
 4750                 SCTP_DECR_READQ_COUNT();
 4751                 /* sa_ignore FREED_MEMORY */
 4752                 sq = TAILQ_FIRST(&asoc->pending_reply_queue);
 4753         }
 4754 
 4755         chk = TAILQ_FIRST(&asoc->free_chunks);
 4756         while (chk) {
 4757                 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next);
 4758                 if (chk->data) {
 4759                         sctp_m_freem(chk->data);
 4760                         chk->data = NULL;
 4761                 }
 4762                 if (chk->holds_key_ref)
 4763                         sctp_auth_key_release(stcb, chk->auth_keyid);
 4764                 ccnt++;
 4765                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
 4766                 SCTP_DECR_CHK_COUNT();
 4767                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1);
 4768                 asoc->free_chunk_cnt--;
 4769                 /* sa_ignore FREED_MEMORY */
 4770                 chk = TAILQ_FIRST(&asoc->free_chunks);
 4771         }
 4772         /* pending send queue SHOULD be empty */
 4773         if (!TAILQ_EMPTY(&asoc->send_queue)) {
 4774                 chk = TAILQ_FIRST(&asoc->send_queue);
 4775                 while (chk) {
 4776                         TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
 4777                         if (chk->data) {
 4778                                 sctp_m_freem(chk->data);
 4779                                 chk->data = NULL;
 4780                         }
 4781                         if (chk->holds_key_ref)
 4782                                 sctp_auth_key_release(stcb, chk->auth_keyid);
 4783                         ccnt++;
 4784                         sctp_free_remote_addr(chk->whoTo);
 4785                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
 4786                         SCTP_DECR_CHK_COUNT();
 4787                         /* sa_ignore FREED_MEMORY */
 4788                         chk = TAILQ_FIRST(&asoc->send_queue);
 4789                 }
 4790         }
 4791 /*
 4792   if (ccnt) {
 4793   printf("Freed %d from send_queue\n", ccnt);
 4794   ccnt = 0;
 4795   }
 4796 */
 4797         /* sent queue SHOULD be empty */
 4798         if (!TAILQ_EMPTY(&asoc->sent_queue)) {
 4799                 chk = TAILQ_FIRST(&asoc->sent_queue);
 4800                 while (chk) {
 4801                         TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
 4802                         if (chk->data) {
 4803                                 sctp_m_freem(chk->data);
 4804                                 chk->data = NULL;
 4805                         }
 4806                         if (chk->holds_key_ref)
 4807                                 sctp_auth_key_release(stcb, chk->auth_keyid);
 4808                         ccnt++;
 4809                         sctp_free_remote_addr(chk->whoTo);
 4810                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
 4811                         SCTP_DECR_CHK_COUNT();
 4812                         /* sa_ignore FREED_MEMORY */
 4813                         chk = TAILQ_FIRST(&asoc->sent_queue);
 4814                 }
 4815         }
 4816 /*
 4817   if (ccnt) {
 4818   printf("Freed %d from sent_queue\n", ccnt);
 4819   ccnt = 0;
 4820   }
 4821 */
 4822         /* control queue MAY not be empty */
 4823         if (!TAILQ_EMPTY(&asoc->control_send_queue)) {
 4824                 chk = TAILQ_FIRST(&asoc->control_send_queue);
 4825                 while (chk) {
 4826                         TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
 4827                         if (chk->data) {
 4828                                 sctp_m_freem(chk->data);
 4829                                 chk->data = NULL;
 4830                         }
 4831                         if (chk->holds_key_ref)
 4832                                 sctp_auth_key_release(stcb, chk->auth_keyid);
 4833                         ccnt++;
 4834                         sctp_free_remote_addr(chk->whoTo);
 4835                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
 4836                         SCTP_DECR_CHK_COUNT();
 4837                         /* sa_ignore FREED_MEMORY */
 4838                         chk = TAILQ_FIRST(&asoc->control_send_queue);
 4839                 }
 4840         }
 4841 /*
 4842   if (ccnt) {
 4843   printf("Freed %d from ctrl_queue\n", ccnt);
 4844   ccnt = 0;
 4845   }
 4846 */
 4847 
 4848         /* ASCONF queue MAY not be empty */
 4849         if (!TAILQ_EMPTY(&asoc->asconf_send_queue)) {
 4850                 chk = TAILQ_FIRST(&asoc->asconf_send_queue);
 4851                 while (chk) {
 4852                         TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
 4853                         if (chk->data) {
 4854                                 sctp_m_freem(chk->data);
 4855                                 chk->data = NULL;
 4856                         }
 4857                         if (chk->holds_key_ref)
 4858                                 sctp_auth_key_release(stcb, chk->auth_keyid);
 4859                         ccnt++;
 4860                         sctp_free_remote_addr(chk->whoTo);
 4861                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
 4862                         SCTP_DECR_CHK_COUNT();
 4863                         /* sa_ignore FREED_MEMORY */
 4864                         chk = TAILQ_FIRST(&asoc->asconf_send_queue);
 4865                 }
 4866         }
 4867 /*
 4868   if (ccnt) {
 4869   printf("Freed %d from asconf_queue\n", ccnt);
 4870   ccnt = 0;
 4871   }
 4872 */
 4873         if (!TAILQ_EMPTY(&asoc->reasmqueue)) {
 4874                 chk = TAILQ_FIRST(&asoc->reasmqueue);
 4875                 while (chk) {
 4876                         TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
 4877                         if (chk->data) {
 4878                                 sctp_m_freem(chk->data);
 4879                                 chk->data = NULL;
 4880                         }
 4881                         if (chk->holds_key_ref)
 4882                                 sctp_auth_key_release(stcb, chk->auth_keyid);
 4883                         sctp_free_remote_addr(chk->whoTo);
 4884                         ccnt++;
 4885                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
 4886                         SCTP_DECR_CHK_COUNT();
 4887                         /* sa_ignore FREED_MEMORY */
 4888                         chk = TAILQ_FIRST(&asoc->reasmqueue);
 4889                 }
 4890         }
 4891 /*
 4892   if (ccnt) {
 4893   printf("Freed %d from reasm_queue\n", ccnt);
 4894   ccnt = 0;
 4895   }
 4896 */
 4897         if (asoc->mapping_array) {
 4898                 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
 4899                 asoc->mapping_array = NULL;
 4900         }
 4901         if (asoc->nr_mapping_array) {
 4902                 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
 4903                 asoc->nr_mapping_array = NULL;
 4904         }
 4905         /* the stream outs */
 4906         if (asoc->strmout) {
 4907                 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
 4908                 asoc->strmout = NULL;
 4909         }
 4910         asoc->strm_realoutsize = asoc->streamoutcnt = 0;
 4911         if (asoc->strmin) {
 4912                 struct sctp_queued_to_read *ctl;
 4913 
 4914                 for (i = 0; i < asoc->streamincnt; i++) {
 4915                         if (!TAILQ_EMPTY(&asoc->strmin[i].inqueue)) {
 4916                                 /* We have somethings on the streamin queue */
 4917                                 ctl = TAILQ_FIRST(&asoc->strmin[i].inqueue);
 4918                                 while (ctl) {
 4919                                         TAILQ_REMOVE(&asoc->strmin[i].inqueue,
 4920                                             ctl, next);
 4921                                         sctp_free_remote_addr(ctl->whoFrom);
 4922                                         if (ctl->data) {
 4923                                                 sctp_m_freem(ctl->data);
 4924                                                 ctl->data = NULL;
 4925                                         }
 4926                                         /*
 4927                                          * We don't free the address here
 4928                                          * since all the net's were freed
 4929                                          * above.
 4930                                          */
 4931                                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl);
 4932                                         SCTP_DECR_READQ_COUNT();
 4933                                         ctl = TAILQ_FIRST(&asoc->strmin[i].inqueue);
 4934                                 }
 4935                         }
 4936                 }
 4937                 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
 4938                 asoc->strmin = NULL;
 4939         }
 4940         asoc->streamincnt = 0;
 4941         while (!TAILQ_EMPTY(&asoc->nets)) {
 4942                 /* sa_ignore FREED_MEMORY */
 4943                 net = TAILQ_FIRST(&asoc->nets);
 4944                 /* pull from list */
 4945                 if ((SCTP_BASE_INFO(ipi_count_raddr) == 0) || (prev == net)) {
 4946 #ifdef INVARIANTS
 4947                         panic("no net's left alloc'ed, or list points to itself");
 4948 #endif
 4949                         break;
 4950                 }
 4951                 prev = net;
 4952                 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
 4953                 sctp_free_remote_addr(net);
 4954         }
 4955 
 4956         while (!SCTP_LIST_EMPTY(&asoc->sctp_restricted_addrs)) {
 4957                 /* sa_ignore FREED_MEMORY */
 4958                 laddr = LIST_FIRST(&asoc->sctp_restricted_addrs);
 4959                 sctp_remove_laddr(laddr);
 4960         }
 4961 
 4962         /* pending asconf (address) parameters */
 4963         while (!TAILQ_EMPTY(&asoc->asconf_queue)) {
 4964                 /* sa_ignore FREED_MEMORY */
 4965                 aparam = TAILQ_FIRST(&asoc->asconf_queue);
 4966                 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
 4967                 SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
 4968         }
 4969         while (!TAILQ_EMPTY(&asoc->asconf_ack_sent)) {
 4970                 /* sa_ignore FREED_MEMORY */
 4971                 aack = TAILQ_FIRST(&asoc->asconf_ack_sent);
 4972                 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next);
 4973                 if (aack->data != NULL) {
 4974                         sctp_m_freem(aack->data);
 4975                 }
 4976                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack);
 4977         }
 4978         /* clean up auth stuff */
 4979         if (asoc->local_hmacs)
 4980                 sctp_free_hmaclist(asoc->local_hmacs);
 4981         if (asoc->peer_hmacs)
 4982                 sctp_free_hmaclist(asoc->peer_hmacs);
 4983 
 4984         if (asoc->local_auth_chunks)
 4985                 sctp_free_chunklist(asoc->local_auth_chunks);
 4986         if (asoc->peer_auth_chunks)
 4987                 sctp_free_chunklist(asoc->peer_auth_chunks);
 4988 
 4989         sctp_free_authinfo(&asoc->authinfo);
 4990 
 4991         shared_key = LIST_FIRST(&asoc->shared_keys);
 4992         while (shared_key) {
 4993                 LIST_REMOVE(shared_key, next);
 4994                 sctp_free_sharedkey(shared_key);
 4995                 /* sa_ignore FREED_MEMORY */
 4996                 shared_key = LIST_FIRST(&asoc->shared_keys);
 4997         }
 4998 
 4999         /* Insert new items here :> */
 5000 
 5001         /* Get rid of LOCK */
 5002         SCTP_TCB_LOCK_DESTROY(stcb);
 5003         SCTP_TCB_SEND_LOCK_DESTROY(stcb);
 5004         if (from_inpcbfree == SCTP_NORMAL_PROC) {
 5005                 SCTP_INP_INFO_WUNLOCK();
 5006                 SCTP_INP_RLOCK(inp);
 5007         }
 5008 #ifdef SCTP_TRACK_FREED_ASOCS
 5009         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
 5010                 /* now clean up the tasoc itself */
 5011                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
 5012                 SCTP_DECR_ASOC_COUNT();
 5013         } else {
 5014                 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist);
 5015         }
 5016 #else
 5017         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
 5018         SCTP_DECR_ASOC_COUNT();
 5019 #endif
 5020         if (from_inpcbfree == SCTP_NORMAL_PROC) {
 5021                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
 5022                         /*
 5023                          * If its NOT the inp_free calling us AND sctp_close
 5024                          * as been called, we call back...
 5025                          */
 5026                         SCTP_INP_RUNLOCK(inp);
 5027                         /*
 5028                          * This will start the kill timer (if we are the
 5029                          * lastone) since we hold an increment yet. But this
 5030                          * is the only safe way to do this since otherwise
 5031                          * if the socket closes at the same time we are here
 5032                          * we might collide in the cleanup.
 5033                          */
 5034                         sctp_inpcb_free(inp,
 5035                             SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE,
 5036                             SCTP_CALLED_DIRECTLY_NOCMPSET);
 5037                         SCTP_INP_DECR_REF(inp);
 5038                         goto out_of;
 5039                 } else {
 5040                         /* The socket is still open. */
 5041                         SCTP_INP_DECR_REF(inp);
 5042                 }
 5043         }
 5044         if (from_inpcbfree == SCTP_NORMAL_PROC) {
 5045                 SCTP_INP_RUNLOCK(inp);
 5046         }
 5047 out_of:
 5048         /* destroyed the asoc */
 5049 #ifdef SCTP_LOG_CLOSING
 5050         sctp_log_closing(inp, NULL, 11);
 5051 #endif
 5052         return (1);
 5053 }
 5054 
 5055 
 5056 
 5057 /*
 5058  * determine if a destination is "reachable" based upon the addresses bound
 5059  * to the current endpoint (e.g. only v4 or v6 currently bound)
 5060  */
 5061 /*
 5062  * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use
 5063  * assoc level v4/v6 flags, as the assoc *may* not have the same address
 5064  * types bound as its endpoint
 5065  */
 5066 int
 5067 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
 5068 {
 5069         struct sctp_inpcb *inp;
 5070         int answer;
 5071 
 5072         /*
 5073          * No locks here, the TCB, in all cases is already locked and an
 5074          * assoc is up. There is either a INP lock by the caller applied (in
 5075          * asconf case when deleting an address) or NOT in the HB case,
 5076          * however if HB then the INP increment is up and the INP will not
 5077          * be removed (on top of the fact that we have a TCB lock). So we
 5078          * only want to read the sctp_flags, which is either bound-all or
 5079          * not.. no protection needed since once an assoc is up you can't be
 5080          * changing your binding.
 5081          */
 5082         inp = stcb->sctp_ep;
 5083         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
 5084                 /* if bound all, destination is not restricted */
 5085                 /*
 5086                  * RRS: Question during lock work: Is this correct? If you
 5087                  * are bound-all you still might need to obey the V4--V6
 5088                  * flags??? IMO this bound-all stuff needs to be removed!
 5089                  */
 5090                 return (1);
 5091         }
 5092         /* NOTE: all "scope" checks are done when local addresses are added */
 5093         if (destaddr->sa_family == AF_INET6) {
 5094                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
 5095         } else if (destaddr->sa_family == AF_INET) {
 5096                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
 5097         } else {
 5098                 /* invalid family, so it's unreachable */
 5099                 answer = 0;
 5100         }
 5101         return (answer);
 5102 }
 5103 
 5104 /*
 5105  * update the inp_vflags on an endpoint
 5106  */
 5107 static void
 5108 sctp_update_ep_vflag(struct sctp_inpcb *inp)
 5109 {
 5110         struct sctp_laddr *laddr;
 5111 
 5112         /* first clear the flag */
 5113         inp->ip_inp.inp.inp_vflag = 0;
 5114         /* set the flag based on addresses on the ep list */
 5115         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
 5116                 if (laddr->ifa == NULL) {
 5117                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
 5118                             __FUNCTION__);
 5119                         continue;
 5120                 }
 5121                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
 5122                         continue;
 5123                 }
 5124                 if (laddr->ifa->address.sa.sa_family == AF_INET6) {
 5125                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
 5126                 } else if (laddr->ifa->address.sa.sa_family == AF_INET) {
 5127                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
 5128                 }
 5129         }
 5130 }
 5131 
 5132 /*
 5133  * Add the address to the endpoint local address list There is nothing to be
 5134  * done if we are bound to all addresses
 5135  */
 5136 void
 5137 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action)
 5138 {
 5139         struct sctp_laddr *laddr;
 5140         int fnd, error = 0;
 5141 
 5142         fnd = 0;
 5143 
 5144         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
 5145                 /* You are already bound to all. You have it already */
 5146                 return;
 5147         }
 5148         if (ifa->address.sa.sa_family == AF_INET6) {
 5149                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
 5150                         /* Can't bind a non-useable addr. */
 5151                         return;
 5152                 }
 5153         }
 5154         /* first, is it already present? */
 5155         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
 5156                 if (laddr->ifa == ifa) {
 5157                         fnd = 1;
 5158                         break;
 5159                 }
 5160         }
 5161 
 5162         if (fnd == 0) {
 5163                 /* Not in the ep list */
 5164                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action);
 5165                 if (error != 0)
 5166                         return;
 5167                 inp->laddr_count++;
 5168                 /* update inp_vflag flags */
 5169                 if (ifa->address.sa.sa_family == AF_INET6) {
 5170                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
 5171                 } else if (ifa->address.sa.sa_family == AF_INET) {
 5172                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
 5173                 }
 5174         }
 5175         return;
 5176 }
 5177 
 5178 
 5179 /*
 5180  * select a new (hopefully reachable) destination net (should only be used
 5181  * when we deleted an ep addr that is the only usable source address to reach
 5182  * the destination net)
 5183  */
 5184 static void
 5185 sctp_select_primary_destination(struct sctp_tcb *stcb)
 5186 {
 5187         struct sctp_nets *net;
 5188 
 5189         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 5190                 /* for now, we'll just pick the first reachable one we find */
 5191                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
 5192                         continue;
 5193                 if (sctp_destination_is_reachable(stcb,
 5194                     (struct sockaddr *)&net->ro._l_addr)) {
 5195                         /* found a reachable destination */
 5196                         stcb->asoc.primary_destination = net;
 5197                 }
 5198         }
 5199         /* I can't there from here! ...we're gonna die shortly... */
 5200 }
 5201 
 5202 
 5203 /*
 5204  * Delete the address from the endpoint local address list There is nothing
 5205  * to be done if we are bound to all addresses
 5206  */
 5207 void
 5208 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
 5209 {
 5210         struct sctp_laddr *laddr;
 5211         int fnd;
 5212 
 5213         fnd = 0;
 5214         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
 5215                 /* You are already bound to all. You have it already */
 5216                 return;
 5217         }
 5218         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
 5219                 if (laddr->ifa == ifa) {
 5220                         fnd = 1;
 5221                         break;
 5222                 }
 5223         }
 5224         if (fnd && (inp->laddr_count < 2)) {
 5225                 /* can't delete unless there are at LEAST 2 addresses */
 5226                 return;
 5227         }
 5228         if (fnd) {
 5229                 /*
 5230                  * clean up any use of this address go through our
 5231                  * associations and clear any last_used_address that match
 5232                  * this one for each assoc, see if a new primary_destination
 5233                  * is needed
 5234                  */
 5235                 struct sctp_tcb *stcb;
 5236 
 5237                 /* clean up "next_addr_touse" */
 5238                 if (inp->next_addr_touse == laddr)
 5239                         /* delete this address */
 5240                         inp->next_addr_touse = NULL;
 5241 
 5242                 /* clean up "last_used_address" */
 5243                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
 5244                         struct sctp_nets *net;
 5245 
 5246                         SCTP_TCB_LOCK(stcb);
 5247                         if (stcb->asoc.last_used_address == laddr)
 5248                                 /* delete this address */
 5249                                 stcb->asoc.last_used_address = NULL;
 5250                         /*
 5251                          * Now spin through all the nets and purge any ref
 5252                          * to laddr
 5253                          */
 5254                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 5255                                 if (net->ro._s_addr &&
 5256                                     (net->ro._s_addr->ifa == laddr->ifa)) {
 5257                                         /* Yep, purge src address selected */
 5258                                         sctp_rtentry_t *rt;
 5259 
 5260                                         /* delete this address if cached */
 5261                                         rt = net->ro.ro_rt;
 5262                                         if (rt != NULL) {
 5263                                                 RTFREE(rt);
 5264                                                 net->ro.ro_rt = NULL;
 5265                                         }
 5266                                         sctp_free_ifa(net->ro._s_addr);
 5267                                         net->ro._s_addr = NULL;
 5268                                         net->src_addr_selected = 0;
 5269                                 }
 5270                         }
 5271                         SCTP_TCB_UNLOCK(stcb);
 5272                 }               /* for each tcb */
 5273                 /* remove it from the ep list */
 5274                 sctp_remove_laddr(laddr);
 5275                 inp->laddr_count--;
 5276                 /* update inp_vflag flags */
 5277                 sctp_update_ep_vflag(inp);
 5278         }
 5279         return;
 5280 }
 5281 
 5282 /*
 5283  * Add the address to the TCB local address restricted list.
 5284  * This is a "pending" address list (eg. addresses waiting for an
 5285  * ASCONF-ACK response) and cannot be used as a valid source address.
 5286  */
 5287 void
 5288 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
 5289 {
 5290         struct sctp_inpcb *inp;
 5291         struct sctp_laddr *laddr;
 5292         struct sctpladdr *list;
 5293 
 5294         /*
 5295          * Assumes TCB is locked.. and possibly the INP. May need to
 5296          * confirm/fix that if we need it and is not the case.
 5297          */
 5298         list = &stcb->asoc.sctp_restricted_addrs;
 5299 
 5300         inp = stcb->sctp_ep;
 5301         if (ifa->address.sa.sa_family == AF_INET6) {
 5302                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
 5303                         /* Can't bind a non-existent addr. */
 5304                         return;
 5305                 }
 5306         }
 5307         /* does the address already exist? */
 5308         LIST_FOREACH(laddr, list, sctp_nxt_addr) {
 5309                 if (laddr->ifa == ifa) {
 5310                         return;
 5311                 }
 5312         }
 5313 
 5314         /* add to the list */
 5315         (void)sctp_insert_laddr(list, ifa, 0);
 5316         return;
 5317 }
 5318 
 5319 /*
 5320  * insert an laddr entry with the given ifa for the desired list
 5321  */
 5322 int
 5323 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act)
 5324 {
 5325         struct sctp_laddr *laddr;
 5326 
 5327         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
 5328         if (laddr == NULL) {
 5329                 /* out of memory? */
 5330                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
 5331                 return (EINVAL);
 5332         }
 5333         SCTP_INCR_LADDR_COUNT();
 5334         bzero(laddr, sizeof(*laddr));
 5335         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
 5336         laddr->ifa = ifa;
 5337         laddr->action = act;
 5338         atomic_add_int(&ifa->refcount, 1);
 5339         /* insert it */
 5340         LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
 5341 
 5342         return (0);
 5343 }
 5344 
 5345 /*
 5346  * Remove an laddr entry from the local address list (on an assoc)
 5347  */
 5348 void
 5349 sctp_remove_laddr(struct sctp_laddr *laddr)
 5350 {
 5351 
 5352         /* remove from the list */
 5353         LIST_REMOVE(laddr, sctp_nxt_addr);
 5354         sctp_free_ifa(laddr->ifa);
 5355         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr);
 5356         SCTP_DECR_LADDR_COUNT();
 5357 }
 5358 
 5359 /*
 5360  * Remove a local address from the TCB local address restricted list
 5361  */
 5362 void
 5363 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
 5364 {
 5365         struct sctp_inpcb *inp;
 5366         struct sctp_laddr *laddr;
 5367 
 5368         /*
 5369          * This is called by asconf work. It is assumed that a) The TCB is
 5370          * locked and b) The INP is locked. This is true in as much as I can
 5371          * trace through the entry asconf code where I did these locks.
 5372          * Again, the ASCONF code is a bit different in that it does lock
 5373          * the INP during its work often times. This must be since we don't
 5374          * want other proc's looking up things while what they are looking
 5375          * up is changing :-D
 5376          */
 5377 
 5378         inp = stcb->sctp_ep;
 5379         /* if subset bound and don't allow ASCONF's, can't delete last */
 5380         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
 5381             sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
 5382                 if (stcb->sctp_ep->laddr_count < 2) {
 5383                         /* can't delete last address */
 5384                         return;
 5385                 }
 5386         }
 5387         LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
 5388                 /* remove the address if it exists */
 5389                 if (laddr->ifa == NULL)
 5390                         continue;
 5391                 if (laddr->ifa == ifa) {
 5392                         sctp_remove_laddr(laddr);
 5393                         return;
 5394                 }
 5395         }
 5396 
 5397         /* address not found! */
 5398         return;
 5399 }
 5400 
 5401 /*
 5402  * Temporarily remove for __APPLE__ until we use the Tiger equivalents
 5403  */
 5404 /* sysctl */
 5405 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
 5406 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
 5407 
 5408 void
 5409 sctp_pcb_init()
 5410 {
 5411         /*
 5412          * SCTP initialization for the PCB structures should be called by
 5413          * the sctp_init() funciton.
 5414          */
 5415         int i;
 5416         struct timeval tv;
 5417 
 5418         if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) {
 5419                 /* error I was called twice */
 5420                 return;
 5421         }
 5422         SCTP_BASE_VAR(sctp_pcb_initialized) = 1;
 5423 
 5424 #if defined(SCTP_LOCAL_TRACE_BUF)
 5425         bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log));
 5426 #endif
 5427         (void)SCTP_GETTIME_TIMEVAL(&tv);
 5428         SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t) tv.tv_sec;
 5429         SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t) tv.tv_usec;
 5430         /* init the empty list of (All) Endpoints */
 5431         LIST_INIT(&SCTP_BASE_INFO(listhead));
 5432 
 5433         /* init the iterator head */
 5434         TAILQ_INIT(&SCTP_BASE_INFO(iteratorhead));
 5435 
 5436         /* init the hash table of endpoints */
 5437         TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize));
 5438         TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize));
 5439         TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale));
 5440         SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31),
 5441             &SCTP_BASE_INFO(hashasocmark));
 5442         SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
 5443             &SCTP_BASE_INFO(hashmark));
 5444         SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
 5445             &SCTP_BASE_INFO(hashtcpmark));
 5446         SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize);
 5447 
 5448 
 5449         SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH,
 5450             &SCTP_BASE_INFO(hashvrfmark));
 5451 
 5452         SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE,
 5453             &SCTP_BASE_INFO(vrf_ifn_hashmark));
 5454         /* init the zones */
 5455         /*
 5456          * FIX ME: Should check for NULL returns, but if it does fail we are
 5457          * doomed to panic anyways... add later maybe.
 5458          */
 5459         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep",
 5460             sizeof(struct sctp_inpcb), maxsockets);
 5461 
 5462         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc",
 5463             sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
 5464 
 5465         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr",
 5466             sizeof(struct sctp_laddr),
 5467             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
 5468 
 5469         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr",
 5470             sizeof(struct sctp_nets),
 5471             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
 5472 
 5473         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk",
 5474             sizeof(struct sctp_tmit_chunk),
 5475             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
 5476 
 5477         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq",
 5478             sizeof(struct sctp_queued_to_read),
 5479             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
 5480 
 5481         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out",
 5482             sizeof(struct sctp_stream_queue_pending),
 5483             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
 5484 
 5485         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf",
 5486             sizeof(struct sctp_asconf),
 5487             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
 5488 
 5489         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack",
 5490             sizeof(struct sctp_asconf_ack),
 5491             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
 5492 
 5493 
 5494         /* Master Lock INIT for info structure */
 5495         SCTP_INP_INFO_LOCK_INIT();
 5496         SCTP_STATLOG_INIT_LOCK();
 5497         SCTP_ITERATOR_LOCK_INIT();
 5498 
 5499         SCTP_IPI_COUNT_INIT();
 5500         SCTP_IPI_ADDR_INIT();
 5501         SCTP_IPI_ITERATOR_WQ_INIT();
 5502 #ifdef SCTP_PACKET_LOGGING
 5503         SCTP_IP_PKTLOG_INIT();
 5504 #endif
 5505         LIST_INIT(&SCTP_BASE_INFO(addr_wq));
 5506 
 5507         /* not sure if we need all the counts */
 5508         SCTP_BASE_INFO(ipi_count_ep) = 0;
 5509         /* assoc/tcb zone info */
 5510         SCTP_BASE_INFO(ipi_count_asoc) = 0;
 5511         /* local addrlist zone info */
 5512         SCTP_BASE_INFO(ipi_count_laddr) = 0;
 5513         /* remote addrlist zone info */
 5514         SCTP_BASE_INFO(ipi_count_raddr) = 0;
 5515         /* chunk info */
 5516         SCTP_BASE_INFO(ipi_count_chunk) = 0;
 5517 
 5518         /* socket queue zone info */
 5519         SCTP_BASE_INFO(ipi_count_readq) = 0;
 5520 
 5521         /* stream out queue cont */
 5522         SCTP_BASE_INFO(ipi_count_strmoq) = 0;
 5523 
 5524         SCTP_BASE_INFO(ipi_free_strmoq) = 0;
 5525         SCTP_BASE_INFO(ipi_free_chunks) = 0;
 5526 
 5527         SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer));
 5528 
 5529         /* Init the TIMEWAIT list */
 5530         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
 5531                 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait[i]));
 5532         }
 5533 
 5534 #if defined(SCTP_USE_THREAD_BASED_ITERATOR)
 5535         SCTP_BASE_INFO(iterator_running) = 0;
 5536         SCTP_BASE_INFO(threads_must_exit) = 0;
 5537         sctp_startup_iterator();
 5538 #endif
 5539 
 5540         /*
 5541          * INIT the default VRF which for BSD is the only one, other O/S's
 5542          * may have more. But initially they must start with one and then
 5543          * add the VRF's as addresses are added.
 5544          */
 5545         sctp_init_vrf_list(SCTP_DEFAULT_VRF);
 5546 
 5547 }
 5548 
 5549 /*
 5550  * Assumes that the SCTP_BASE_INFO() lock is NOT held.
 5551  */
 5552 void
 5553 sctp_pcb_finish(void)
 5554 {
 5555         struct sctp_vrflist *vrf_bucket;
 5556         struct sctp_vrf *vrf;
 5557         struct sctp_ifn *ifn;
 5558         struct sctp_ifa *ifa;
 5559         struct sctpvtaghead *chain;
 5560         struct sctp_tagblock *twait_block, *prev_twait_block;
 5561         int i;
 5562 
 5563         /*
 5564          * free the vrf/ifn/ifa lists and hashes (be sure address monitor is
 5565          * destroyed first).
 5566          */
 5567         vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))];
 5568         vrf = LIST_FIRST(vrf_bucket);
 5569         while (vrf) {
 5570                 ifn = LIST_FIRST(&vrf->ifnlist);
 5571                 while (ifn) {
 5572                         ifa = LIST_FIRST(&ifn->ifalist);
 5573                         while (ifa) {
 5574                                 /* free the ifa */
 5575                                 LIST_REMOVE(ifa, next_bucket);
 5576                                 LIST_REMOVE(ifa, next_ifa);
 5577                                 SCTP_FREE(ifa, SCTP_M_IFA);
 5578                                 ifa = LIST_FIRST(&ifn->ifalist);
 5579                         }
 5580                         /* free the ifn */
 5581                         LIST_REMOVE(ifn, next_bucket);
 5582                         LIST_REMOVE(ifn, next_ifn);
 5583                         SCTP_FREE(ifn, SCTP_M_IFN);
 5584                         ifn = LIST_FIRST(&vrf->ifnlist);
 5585                 }
 5586                 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
 5587                 /* free the vrf */
 5588                 LIST_REMOVE(vrf, next_vrf);
 5589                 SCTP_FREE(vrf, SCTP_M_VRF);
 5590                 vrf = LIST_FIRST(vrf_bucket);
 5591         }
 5592         /* free the vrf hashes */
 5593         SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark));
 5594         SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark));
 5595 
 5596         /*
 5597          * free the TIMEWAIT list elements malloc'd in the function
 5598          * sctp_add_vtag_to_timewait()...
 5599          */
 5600         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
 5601                 chain = &SCTP_BASE_INFO(vtag_timewait)[i];
 5602                 if (!SCTP_LIST_EMPTY(chain)) {
 5603                         prev_twait_block = NULL;
 5604                         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
 5605                                 if (prev_twait_block) {
 5606                                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
 5607                                 }
 5608                                 prev_twait_block = twait_block;
 5609                         }
 5610                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
 5611                 }
 5612         }
 5613 
 5614         /* free the locks and mutexes */
 5615 #ifdef SCTP_PACKET_LOGGING
 5616         SCTP_IP_PKTLOG_DESTROY();
 5617 
 5618 #endif
 5619         SCTP_IPI_ITERATOR_WQ_DESTROY();
 5620         SCTP_IPI_ADDR_DESTROY();
 5621         SCTP_ITERATOR_LOCK_DESTROY();
 5622         SCTP_STATLOG_DESTROY();
 5623         SCTP_INP_INFO_LOCK_DESTROY();
 5624 
 5625         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep));
 5626         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc));
 5627         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr));
 5628         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net));
 5629         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk));
 5630         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq));
 5631         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq));
 5632         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf));
 5633         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack));
 5634         /* Get rid of other stuff to */
 5635         if (SCTP_BASE_INFO(sctp_asochash) != NULL)
 5636                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark));
 5637         if (SCTP_BASE_INFO(sctp_ephash) != NULL)
 5638                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark));
 5639         if (SCTP_BASE_INFO(sctp_tcpephash) != NULL)
 5640                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark));
 5641 
 5642 }
 5643 
 5644 
 5645 int
 5646 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
 5647     int iphlen, int offset, int limit, struct sctphdr *sh,
 5648     struct sockaddr *altsa)
 5649 {
 5650         /*
 5651          * grub through the INIT pulling addresses and loading them to the
 5652          * nets structure in the asoc. The from address in the mbuf should
 5653          * also be loaded (if it is not already). This routine can be called
 5654          * with either INIT or INIT-ACK's as long as the m points to the IP
 5655          * packet and the offset points to the beginning of the parameters.
 5656          */
 5657         struct sctp_inpcb *inp, *l_inp;
 5658         struct sctp_nets *net, *net_tmp;
 5659         struct ip *iph;
 5660         struct sctp_paramhdr *phdr, parm_buf;
 5661         struct sctp_tcb *stcb_tmp;
 5662         uint16_t ptype, plen;
 5663         struct sockaddr *sa;
 5664         struct sockaddr_storage dest_store;
 5665         struct sockaddr *local_sa = (struct sockaddr *)&dest_store;
 5666         struct sockaddr_in sin;
 5667         struct sockaddr_in6 sin6;
 5668         uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
 5669         struct sctp_auth_random *p_random = NULL;
 5670         uint16_t random_len = 0;
 5671         uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE];
 5672         struct sctp_auth_hmac_algo *hmacs = NULL;
 5673         uint16_t hmacs_len = 0;
 5674         uint8_t saw_asconf = 0;
 5675         uint8_t saw_asconf_ack = 0;
 5676         uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE];
 5677         struct sctp_auth_chunk_list *chunks = NULL;
 5678         uint16_t num_chunks = 0;
 5679         sctp_key_t *new_key;
 5680         uint32_t keylen;
 5681         int got_random = 0, got_hmacs = 0, got_chklist = 0;
 5682 
 5683         /* First get the destination address setup too. */
 5684         memset(&sin, 0, sizeof(sin));
 5685         memset(&sin6, 0, sizeof(sin6));
 5686 
 5687         sin.sin_family = AF_INET;
 5688         sin.sin_len = sizeof(sin);
 5689         sin.sin_port = stcb->rport;
 5690 
 5691         sin6.sin6_family = AF_INET6;
 5692         sin6.sin6_len = sizeof(struct sockaddr_in6);
 5693         sin6.sin6_port = stcb->rport;
 5694         if (altsa == NULL) {
 5695                 iph = mtod(m, struct ip *);
 5696                 switch (iph->ip_v) {
 5697                 case IPVERSION:
 5698                         {
 5699                                 /* its IPv4 */
 5700                                 struct sockaddr_in *sin_2;
 5701 
 5702                                 sin_2 = (struct sockaddr_in *)(local_sa);
 5703                                 memset(sin_2, 0, sizeof(sin));
 5704                                 sin_2->sin_family = AF_INET;
 5705                                 sin_2->sin_len = sizeof(sin);
 5706                                 sin_2->sin_port = sh->dest_port;
 5707                                 sin_2->sin_addr.s_addr = iph->ip_dst.s_addr;
 5708                                 sin.sin_addr = iph->ip_src;
 5709                                 sa = (struct sockaddr *)&sin;
 5710                                 break;
 5711                         }
 5712 #ifdef INET6
 5713                 case IPV6_VERSION >> 4:
 5714                         {
 5715                                 /* its IPv6 */
 5716                                 struct ip6_hdr *ip6;
 5717                                 struct sockaddr_in6 *sin6_2;
 5718 
 5719                                 ip6 = mtod(m, struct ip6_hdr *);
 5720                                 sin6_2 = (struct sockaddr_in6 *)(local_sa);
 5721                                 memset(sin6_2, 0, sizeof(sin6));
 5722                                 sin6_2->sin6_family = AF_INET6;
 5723                                 sin6_2->sin6_len = sizeof(struct sockaddr_in6);
 5724                                 sin6_2->sin6_port = sh->dest_port;
 5725                                 sin6.sin6_addr = ip6->ip6_src;
 5726                                 sa = (struct sockaddr *)&sin6;
 5727                                 break;
 5728                         }
 5729 #endif
 5730                 default:
 5731                         sa = NULL;
 5732                         break;
 5733                 }
 5734         } else {
 5735                 /*
 5736                  * For cookies we use the src address NOT from the packet
 5737                  * but from the original INIT
 5738                  */
 5739                 sa = altsa;
 5740         }
 5741         /* Turn off ECN until we get through all params */
 5742         stcb->asoc.ecn_allowed = 0;
 5743         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 5744                 /* mark all addresses that we have currently on the list */
 5745                 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
 5746         }
 5747         /* does the source address already exist? if so skip it */
 5748         l_inp = inp = stcb->sctp_ep;
 5749 
 5750         atomic_add_int(&stcb->asoc.refcnt, 1);
 5751         stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, local_sa, stcb);
 5752         atomic_add_int(&stcb->asoc.refcnt, -1);
 5753 
 5754         if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
 5755                 /* we must add the source address */
 5756                 /* no scope set here since we have a tcb already. */
 5757                 if ((sa->sa_family == AF_INET) &&
 5758                     (stcb->asoc.ipv4_addr_legal)) {
 5759                         if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) {
 5760                                 return (-1);
 5761                         }
 5762                 } else if ((sa->sa_family == AF_INET6) &&
 5763                     (stcb->asoc.ipv6_addr_legal)) {
 5764                         if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
 5765                                 return (-2);
 5766                         }
 5767                 }
 5768         } else {
 5769                 if (net_tmp != NULL && stcb_tmp == stcb) {
 5770                         net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
 5771                 } else if (stcb_tmp != stcb) {
 5772                         /* It belongs to another association? */
 5773                         if (stcb_tmp)
 5774                                 SCTP_TCB_UNLOCK(stcb_tmp);
 5775                         return (-3);
 5776                 }
 5777         }
 5778         if (stcb->asoc.state == 0) {
 5779                 /* the assoc was freed? */
 5780                 return (-4);
 5781         }
 5782         /*
 5783          * peer must explicitly turn this on. This may have been initialized
 5784          * to be "on" in order to allow local addr changes while INIT's are
 5785          * in flight.
 5786          */
 5787         stcb->asoc.peer_supports_asconf = 0;
 5788         /* now we must go through each of the params. */
 5789         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
 5790         while (phdr) {
 5791                 ptype = ntohs(phdr->param_type);
 5792                 plen = ntohs(phdr->param_length);
 5793                 /*
 5794                  * printf("ptype => %0x, plen => %d\n", (uint32_t)ptype,
 5795                  * (int)plen);
 5796                  */
 5797                 if (offset + plen > limit) {
 5798                         break;
 5799                 }
 5800                 if (plen == 0) {
 5801                         break;
 5802                 }
 5803                 if (ptype == SCTP_IPV4_ADDRESS) {
 5804                         if (stcb->asoc.ipv4_addr_legal) {
 5805                                 struct sctp_ipv4addr_param *p4, p4_buf;
 5806 
 5807                                 /* ok get the v4 address and check/add */
 5808                                 phdr = sctp_get_next_param(m, offset,
 5809                                     (struct sctp_paramhdr *)&p4_buf,
 5810                                     sizeof(p4_buf));
 5811                                 if (plen != sizeof(struct sctp_ipv4addr_param) ||
 5812                                     phdr == NULL) {
 5813                                         return (-5);
 5814                                 }
 5815                                 p4 = (struct sctp_ipv4addr_param *)phdr;
 5816                                 sin.sin_addr.s_addr = p4->addr;
 5817                                 if (IN_MULTICAST(sin.sin_addr.s_addr)) {
 5818                                         /* Skip multi-cast addresses */
 5819                                         goto next_param;
 5820                                 }
 5821                                 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) ||
 5822                                     (sin.sin_addr.s_addr == INADDR_ANY)) {
 5823                                         goto next_param;
 5824                                 }
 5825                                 sa = (struct sockaddr *)&sin;
 5826                                 inp = stcb->sctp_ep;
 5827                                 atomic_add_int(&stcb->asoc.refcnt, 1);
 5828                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
 5829                                     local_sa, stcb);
 5830                                 atomic_add_int(&stcb->asoc.refcnt, -1);
 5831 
 5832                                 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) ||
 5833                                     inp == NULL) {
 5834                                         /* we must add the source address */
 5835                                         /*
 5836                                          * no scope set since we have a tcb
 5837                                          * already
 5838                                          */
 5839 
 5840                                         /*
 5841                                          * we must validate the state again
 5842                                          * here
 5843                                          */
 5844                         add_it_now:
 5845                                         if (stcb->asoc.state == 0) {
 5846                                                 /* the assoc was freed? */
 5847                                                 return (-7);
 5848                                         }
 5849                                         if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) {
 5850                                                 return (-8);
 5851                                         }
 5852                                 } else if (stcb_tmp == stcb) {
 5853                                         if (stcb->asoc.state == 0) {
 5854                                                 /* the assoc was freed? */
 5855                                                 return (-10);
 5856                                         }
 5857                                         if (net != NULL) {
 5858                                                 /* clear flag */
 5859                                                 net->dest_state &=
 5860                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
 5861                                         }
 5862                                 } else {
 5863                                         /*
 5864                                          * strange, address is in another
 5865                                          * assoc? straighten out locks.
 5866                                          */
 5867                                         if (stcb_tmp) {
 5868                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
 5869                                                         /*
 5870                                                          * in setup state we
 5871                                                          * abort this guy
 5872                                                          */
 5873                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
 5874                                                             stcb_tmp, 1, NULL, 0);
 5875                                                         goto add_it_now;
 5876                                                 }
 5877                                                 SCTP_TCB_UNLOCK(stcb_tmp);
 5878                                         }
 5879                                         if (stcb->asoc.state == 0) {
 5880                                                 /* the assoc was freed? */
 5881                                                 return (-12);
 5882                                         }
 5883                                         return (-13);
 5884                                 }
 5885                         }
 5886                 } else if (ptype == SCTP_IPV6_ADDRESS) {
 5887                         if (stcb->asoc.ipv6_addr_legal) {
 5888                                 /* ok get the v6 address and check/add */
 5889                                 struct sctp_ipv6addr_param *p6, p6_buf;
 5890 
 5891                                 phdr = sctp_get_next_param(m, offset,
 5892                                     (struct sctp_paramhdr *)&p6_buf,
 5893                                     sizeof(p6_buf));
 5894                                 if (plen != sizeof(struct sctp_ipv6addr_param) ||
 5895                                     phdr == NULL) {
 5896                                         return (-14);
 5897                                 }
 5898                                 p6 = (struct sctp_ipv6addr_param *)phdr;
 5899                                 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
 5900                                     sizeof(p6->addr));
 5901                                 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
 5902                                         /* Skip multi-cast addresses */
 5903                                         goto next_param;
 5904                                 }
 5905                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
 5906                                         /*
 5907                                          * Link local make no sense without
 5908                                          * scope
 5909                                          */
 5910                                         goto next_param;
 5911                                 }
 5912                                 sa = (struct sockaddr *)&sin6;
 5913                                 inp = stcb->sctp_ep;
 5914                                 atomic_add_int(&stcb->asoc.refcnt, 1);
 5915                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
 5916                                     local_sa, stcb);
 5917                                 atomic_add_int(&stcb->asoc.refcnt, -1);
 5918                                 if (stcb_tmp == NULL &&
 5919                                     (inp == stcb->sctp_ep || inp == NULL)) {
 5920                                         /*
 5921                                          * we must validate the state again
 5922                                          * here
 5923                                          */
 5924                         add_it_now6:
 5925                                         if (stcb->asoc.state == 0) {
 5926                                                 /* the assoc was freed? */
 5927                                                 return (-16);
 5928                                         }
 5929                                         /*
 5930                                          * we must add the address, no scope
 5931                                          * set
 5932                                          */
 5933                                         if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) {
 5934                                                 return (-17);
 5935                                         }
 5936                                 } else if (stcb_tmp == stcb) {
 5937                                         /*
 5938                                          * we must validate the state again
 5939                                          * here
 5940                                          */
 5941                                         if (stcb->asoc.state == 0) {
 5942                                                 /* the assoc was freed? */
 5943                                                 return (-19);
 5944                                         }
 5945                                         if (net != NULL) {
 5946                                                 /* clear flag */
 5947                                                 net->dest_state &=
 5948                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
 5949                                         }
 5950                                 } else {
 5951                                         /*
 5952                                          * strange, address is in another
 5953                                          * assoc? straighten out locks.
 5954                                          */
 5955                                         if (stcb_tmp)
 5956                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
 5957                                                         /*
 5958                                                          * in setup state we
 5959                                                          * abort this guy
 5960                                                          */
 5961                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
 5962                                                             stcb_tmp, 1, NULL, 0);
 5963                                                         goto add_it_now6;
 5964                                                 }
 5965                                         SCTP_TCB_UNLOCK(stcb_tmp);
 5966 
 5967                                         if (stcb->asoc.state == 0) {
 5968                                                 /* the assoc was freed? */
 5969                                                 return (-21);
 5970                                         }
 5971                                         return (-22);
 5972                                 }
 5973                         }
 5974                 } else if (ptype == SCTP_ECN_CAPABLE) {
 5975                         stcb->asoc.ecn_allowed = 1;
 5976                 } else if (ptype == SCTP_ULP_ADAPTATION) {
 5977                         if (stcb->asoc.state != SCTP_STATE_OPEN) {
 5978                                 struct sctp_adaptation_layer_indication ai,
 5979                                                                 *aip;
 5980 
 5981                                 phdr = sctp_get_next_param(m, offset,
 5982                                     (struct sctp_paramhdr *)&ai, sizeof(ai));
 5983                                 aip = (struct sctp_adaptation_layer_indication *)phdr;
 5984                                 if (aip) {
 5985                                         stcb->asoc.peers_adaptation = ntohl(aip->indication);
 5986                                         stcb->asoc.adaptation_needed = 1;
 5987                                 }
 5988                         }
 5989                 } else if (ptype == SCTP_SET_PRIM_ADDR) {
 5990                         struct sctp_asconf_addr_param lstore, *fee;
 5991                         struct sctp_asconf_addrv4_param *fii;
 5992                         int lptype;
 5993                         struct sockaddr *lsa = NULL;
 5994 
 5995                         stcb->asoc.peer_supports_asconf = 1;
 5996                         if (plen > sizeof(lstore)) {
 5997                                 return (-23);
 5998                         }
 5999                         phdr = sctp_get_next_param(m, offset,
 6000                             (struct sctp_paramhdr *)&lstore,
 6001                             min(plen, sizeof(lstore)));
 6002                         if (phdr == NULL) {
 6003                                 return (-24);
 6004                         }
 6005                         fee = (struct sctp_asconf_addr_param *)phdr;
 6006                         lptype = ntohs(fee->addrp.ph.param_type);
 6007                         if (lptype == SCTP_IPV4_ADDRESS) {
 6008                                 if (plen !=
 6009                                     sizeof(struct sctp_asconf_addrv4_param)) {
 6010                                         SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n",
 6011                                             (int)sizeof(struct sctp_asconf_addrv4_param),
 6012                                             plen);
 6013                                 } else {
 6014                                         fii = (struct sctp_asconf_addrv4_param *)fee;
 6015                                         sin.sin_addr.s_addr = fii->addrp.addr;
 6016                                         lsa = (struct sockaddr *)&sin;
 6017                                 }
 6018                         } else if (lptype == SCTP_IPV6_ADDRESS) {
 6019                                 if (plen !=
 6020                                     sizeof(struct sctp_asconf_addr_param)) {
 6021                                         SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
 6022                                             (int)sizeof(struct sctp_asconf_addr_param),
 6023                                             plen);
 6024                                 } else {
 6025                                         memcpy(sin6.sin6_addr.s6_addr,
 6026                                             fee->addrp.addr,
 6027                                             sizeof(fee->addrp.addr));
 6028                                         lsa = (struct sockaddr *)&sin6;
 6029                                 }
 6030                         }
 6031                         if (lsa) {
 6032                                 (void)sctp_set_primary_addr(stcb, sa, NULL);
 6033                         }
 6034                 } else if (ptype == SCTP_HAS_NAT_SUPPORT) {
 6035                         stcb->asoc.peer_supports_nat = 1;
 6036                 } else if (ptype == SCTP_PRSCTP_SUPPORTED) {
 6037                         /* Peer supports pr-sctp */
 6038                         stcb->asoc.peer_supports_prsctp = 1;
 6039                 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
 6040                         /* A supported extension chunk */
 6041                         struct sctp_supported_chunk_types_param *pr_supported;
 6042                         uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
 6043                         int num_ent, i;
 6044 
 6045                         phdr = sctp_get_next_param(m, offset,
 6046                             (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen));
 6047                         if (phdr == NULL) {
 6048                                 return (-25);
 6049                         }
 6050                         stcb->asoc.peer_supports_asconf = 0;
 6051                         stcb->asoc.peer_supports_prsctp = 0;
 6052                         stcb->asoc.peer_supports_pktdrop = 0;
 6053                         stcb->asoc.peer_supports_strreset = 0;
 6054                         stcb->asoc.peer_supports_nr_sack = 0;
 6055                         stcb->asoc.peer_supports_auth = 0;
 6056                         pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
 6057                         num_ent = plen - sizeof(struct sctp_paramhdr);
 6058                         for (i = 0; i < num_ent; i++) {
 6059                                 switch (pr_supported->chunk_types[i]) {
 6060                                 case SCTP_ASCONF:
 6061                                 case SCTP_ASCONF_ACK:
 6062                                         stcb->asoc.peer_supports_asconf = 1;
 6063                                         break;
 6064                                 case SCTP_FORWARD_CUM_TSN:
 6065                                         stcb->asoc.peer_supports_prsctp = 1;
 6066                                         break;
 6067                                 case SCTP_PACKET_DROPPED:
 6068                                         stcb->asoc.peer_supports_pktdrop = 1;
 6069                                         break;
 6070                                 case SCTP_NR_SELECTIVE_ACK:
 6071                                         if (SCTP_BASE_SYSCTL(sctp_nr_sack_on_off))
 6072                                                 stcb->asoc.peer_supports_nr_sack = 1;
 6073                                         else
 6074                                                 stcb->asoc.peer_supports_nr_sack = 0;
 6075                                         break;
 6076                                 case SCTP_STREAM_RESET:
 6077                                         stcb->asoc.peer_supports_strreset = 1;
 6078                                         break;
 6079                                 case SCTP_AUTHENTICATION:
 6080                                         stcb->asoc.peer_supports_auth = 1;
 6081                                         break;
 6082                                 default:
 6083                                         /* one I have not learned yet */
 6084                                         break;
 6085 
 6086                                 }
 6087                         }
 6088                 } else if (ptype == SCTP_ECN_NONCE_SUPPORTED) {
 6089                         /* Peer supports ECN-nonce */
 6090                         stcb->asoc.peer_supports_ecn_nonce = 1;
 6091                         stcb->asoc.ecn_nonce_allowed = 1;
 6092                 } else if (ptype == SCTP_RANDOM) {
 6093                         if (plen > sizeof(random_store))
 6094                                 break;
 6095                         if (got_random) {
 6096                                 /* already processed a RANDOM */
 6097                                 goto next_param;
 6098                         }
 6099                         phdr = sctp_get_next_param(m, offset,
 6100                             (struct sctp_paramhdr *)random_store,
 6101                             min(sizeof(random_store), plen));
 6102                         if (phdr == NULL)
 6103                                 return (-26);
 6104                         p_random = (struct sctp_auth_random *)phdr;
 6105                         random_len = plen - sizeof(*p_random);
 6106                         /* enforce the random length */
 6107                         if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) {
 6108                                 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n");
 6109                                 return (-27);
 6110                         }
 6111                         got_random = 1;
 6112                 } else if (ptype == SCTP_HMAC_LIST) {
 6113                         int num_hmacs;
 6114                         int i;
 6115 
 6116                         if (plen > sizeof(hmacs_store))
 6117                                 break;
 6118                         if (got_hmacs) {
 6119                                 /* already processed a HMAC list */
 6120                                 goto next_param;
 6121                         }
 6122                         phdr = sctp_get_next_param(m, offset,
 6123                             (struct sctp_paramhdr *)hmacs_store,
 6124                             min(plen, sizeof(hmacs_store)));
 6125                         if (phdr == NULL)
 6126                                 return (-28);
 6127                         hmacs = (struct sctp_auth_hmac_algo *)phdr;
 6128                         hmacs_len = plen - sizeof(*hmacs);
 6129                         num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
 6130                         /* validate the hmac list */
 6131                         if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
 6132                                 return (-29);
 6133                         }
 6134                         if (stcb->asoc.peer_hmacs != NULL)
 6135                                 sctp_free_hmaclist(stcb->asoc.peer_hmacs);
 6136                         stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs);
 6137                         if (stcb->asoc.peer_hmacs != NULL) {
 6138                                 for (i = 0; i < num_hmacs; i++) {
 6139                                         (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs,
 6140                                             ntohs(hmacs->hmac_ids[i]));
 6141                                 }
 6142                         }
 6143                         got_hmacs = 1;
 6144                 } else if (ptype == SCTP_CHUNK_LIST) {
 6145                         int i;
 6146 
 6147                         if (plen > sizeof(chunks_store))
 6148                                 break;
 6149                         if (got_chklist) {
 6150                                 /* already processed a Chunks list */
 6151                                 goto next_param;
 6152                         }
 6153                         phdr = sctp_get_next_param(m, offset,
 6154                             (struct sctp_paramhdr *)chunks_store,
 6155                             min(plen, sizeof(chunks_store)));
 6156                         if (phdr == NULL)
 6157                                 return (-30);
 6158                         chunks = (struct sctp_auth_chunk_list *)phdr;
 6159                         num_chunks = plen - sizeof(*chunks);
 6160                         if (stcb->asoc.peer_auth_chunks != NULL)
 6161                                 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks);
 6162                         else
 6163                                 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist();
 6164                         for (i = 0; i < num_chunks; i++) {
 6165                                 (void)sctp_auth_add_chunk(chunks->chunk_types[i],
 6166                                     stcb->asoc.peer_auth_chunks);
 6167                                 /* record asconf/asconf-ack if listed */
 6168                                 if (chunks->chunk_types[i] == SCTP_ASCONF)
 6169                                         saw_asconf = 1;
 6170                                 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK)
 6171                                         saw_asconf_ack = 1;
 6172 
 6173                         }
 6174                         got_chklist = 1;
 6175                 } else if ((ptype == SCTP_HEARTBEAT_INFO) ||
 6176                             (ptype == SCTP_STATE_COOKIE) ||
 6177                             (ptype == SCTP_UNRECOG_PARAM) ||
 6178                             (ptype == SCTP_COOKIE_PRESERVE) ||
 6179                             (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
 6180                             (ptype == SCTP_ADD_IP_ADDRESS) ||
 6181                             (ptype == SCTP_DEL_IP_ADDRESS) ||
 6182                             (ptype == SCTP_ERROR_CAUSE_IND) ||
 6183                     (ptype == SCTP_SUCCESS_REPORT)) {
 6184                          /* don't care */ ;
 6185                 } else {
 6186                         if ((ptype & 0x8000) == 0x0000) {
 6187                                 /*
 6188                                  * must stop processing the rest of the
 6189                                  * param's. Any report bits were handled
 6190                                  * with the call to
 6191                                  * sctp_arethere_unrecognized_parameters()
 6192                                  * when the INIT or INIT-ACK was first seen.
 6193                                  */
 6194                                 break;
 6195                         }
 6196                 }
 6197 
 6198 next_param:
 6199                 offset += SCTP_SIZE32(plen);
 6200                 if (offset >= limit) {
 6201                         break;
 6202                 }
 6203                 phdr = sctp_get_next_param(m, offset, &parm_buf,
 6204                     sizeof(parm_buf));
 6205         }
 6206         /* Now check to see if we need to purge any addresses */
 6207         for (net = TAILQ_FIRST(&stcb->asoc.nets); net != NULL; net = net_tmp) {
 6208                 net_tmp = TAILQ_NEXT(net, sctp_next);
 6209                 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
 6210                     SCTP_ADDR_NOT_IN_ASSOC) {
 6211                         /* This address has been removed from the asoc */
 6212                         /* remove and free it */
 6213                         stcb->asoc.numnets--;
 6214                         TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
 6215                         sctp_free_remote_addr(net);
 6216                         if (net == stcb->asoc.primary_destination) {
 6217                                 stcb->asoc.primary_destination = NULL;
 6218                                 sctp_select_primary_destination(stcb);
 6219                         }
 6220                 }
 6221         }
 6222         /* validate authentication required parameters */
 6223         if (got_random && got_hmacs) {
 6224                 stcb->asoc.peer_supports_auth = 1;
 6225         } else {
 6226                 stcb->asoc.peer_supports_auth = 0;
 6227         }
 6228         if (!stcb->asoc.peer_supports_auth && got_chklist) {
 6229                 /* peer does not support auth but sent a chunks list? */
 6230                 return (-31);
 6231         }
 6232         if (!SCTP_BASE_SYSCTL(sctp_asconf_auth_nochk) && stcb->asoc.peer_supports_asconf &&
 6233             !stcb->asoc.peer_supports_auth) {
 6234                 /* peer supports asconf but not auth? */
 6235                 return (-32);
 6236         } else if ((stcb->asoc.peer_supports_asconf) && (stcb->asoc.peer_supports_auth) &&
 6237             ((saw_asconf == 0) || (saw_asconf_ack == 0))) {
 6238                 return (-33);
 6239         }
 6240         /* concatenate the full random key */
 6241 #ifdef SCTP_AUTH_DRAFT_04
 6242         keylen = random_len;
 6243         new_key = sctp_alloc_key(keylen);
 6244         if (new_key != NULL) {
 6245                 /* copy in the RANDOM */
 6246                 if (p_random != NULL)
 6247                         bcopy(p_random->random_data, new_key->key, random_len);
 6248         }
 6249 #else
 6250         keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len;
 6251         if (chunks != NULL) {
 6252                 keylen += sizeof(*chunks) + num_chunks;
 6253         }
 6254         new_key = sctp_alloc_key(keylen);
 6255         if (new_key != NULL) {
 6256                 /* copy in the RANDOM */
 6257                 if (p_random != NULL) {
 6258                         keylen = sizeof(*p_random) + random_len;
 6259                         bcopy(p_random, new_key->key, keylen);
 6260                 }
 6261                 /* append in the AUTH chunks */
 6262                 if (chunks != NULL) {
 6263                         bcopy(chunks, new_key->key + keylen,
 6264                             sizeof(*chunks) + num_chunks);
 6265                         keylen += sizeof(*chunks) + num_chunks;
 6266                 }
 6267                 /* append in the HMACs */
 6268                 if (hmacs != NULL) {
 6269                         bcopy(hmacs, new_key->key + keylen,
 6270                             sizeof(*hmacs) + hmacs_len);
 6271                 }
 6272         }
 6273 #endif
 6274         else {
 6275                 /* failed to get memory for the key */
 6276                 return (-34);
 6277         }
 6278         if (stcb->asoc.authinfo.peer_random != NULL)
 6279                 sctp_free_key(stcb->asoc.authinfo.peer_random);
 6280         stcb->asoc.authinfo.peer_random = new_key;
 6281 #ifdef SCTP_AUTH_DRAFT_04
 6282         /* don't include the chunks and hmacs for draft -04 */
 6283         stcb->asoc.authinfo.peer_random->keylen = random_len;
 6284 #endif
 6285         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
 6286         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
 6287 
 6288         return (0);
 6289 }
 6290 
 6291 int
 6292 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
 6293     struct sctp_nets *net)
 6294 {
 6295         /* make sure the requested primary address exists in the assoc */
 6296         if (net == NULL && sa)
 6297                 net = sctp_findnet(stcb, sa);
 6298 
 6299         if (net == NULL) {
 6300                 /* didn't find the requested primary address! */
 6301                 return (-1);
 6302         } else {
 6303                 /* set the primary address */
 6304                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
 6305                         /* Must be confirmed, so queue to set */
 6306                         net->dest_state |= SCTP_ADDR_REQ_PRIMARY;
 6307                         return (0);
 6308                 }
 6309                 stcb->asoc.primary_destination = net;
 6310                 net->dest_state &= ~SCTP_ADDR_WAS_PRIMARY;
 6311                 net = TAILQ_FIRST(&stcb->asoc.nets);
 6312                 if (net != stcb->asoc.primary_destination) {
 6313                         /*
 6314                          * first one on the list is NOT the primary
 6315                          * sctp_cmpaddr() is much more efficent if the
 6316                          * primary is the first on the list, make it so.
 6317                          */
 6318                         TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
 6319                         TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
 6320                 }
 6321                 return (0);
 6322         }
 6323 }
 6324 
 6325 int
 6326 sctp_is_vtag_good(struct sctp_inpcb *inp, uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now, int save_in_twait)
 6327 {
 6328         /*
 6329          * This function serves two purposes. It will see if a TAG can be
 6330          * re-used and return 1 for yes it is ok and 0 for don't use that
 6331          * tag. A secondary function it will do is purge out old tags that
 6332          * can be removed.
 6333          */
 6334         struct sctpvtaghead *chain;
 6335         struct sctp_tagblock *twait_block;
 6336         struct sctpasochead *head;
 6337         struct sctp_tcb *stcb;
 6338         int i;
 6339 
 6340         SCTP_INP_INFO_RLOCK();
 6341         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
 6342             SCTP_BASE_INFO(hashasocmark))];
 6343         if (head == NULL) {
 6344                 /* invalid vtag */
 6345                 goto skip_vtag_check;
 6346         }
 6347         LIST_FOREACH(stcb, head, sctp_asocs) {
 6348                 /*
 6349                  * We choose not to lock anything here. TCB's can't be
 6350                  * removed since we have the read lock, so they can't be
 6351                  * freed on us, same thing for the INP. I may be wrong with
 6352                  * this assumption, but we will go with it for now :-)
 6353                  */
 6354                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
 6355                         continue;
 6356                 }
 6357                 if (stcb->asoc.my_vtag == tag) {
 6358                         /* candidate */
 6359                         if (stcb->rport != rport) {
 6360                                 continue;
 6361                         }
 6362                         if (stcb->sctp_ep->sctp_lport != lport) {
 6363                                 continue;
 6364                         }
 6365                         /* Its a used tag set */
 6366                         SCTP_INP_INFO_WUNLOCK();
 6367                         return (0);
 6368                 }
 6369         }
 6370 skip_vtag_check:
 6371 
 6372         chain = &SCTP_BASE_INFO(vtag_timewait[(tag % SCTP_STACK_VTAG_HASH_SIZE))];
 6373         /* Now what about timed wait ? */
 6374         if (!SCTP_LIST_EMPTY(chain)) {
 6375                 /*
 6376                  * Block(s) are present, lets see if we have this tag in the
 6377                  * list
 6378                  */
 6379                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
 6380                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
 6381                                 if (twait_block->vtag_block[i].v_tag == 0) {
 6382                                         /* not used */
 6383                                         continue;
 6384                                 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire <
 6385                                     now->tv_sec) {
 6386                                         /* Audit expires this guy */
 6387                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
 6388                                         twait_block->vtag_block[i].v_tag = 0;
 6389                                         twait_block->vtag_block[i].lport = 0;
 6390                                         twait_block->vtag_block[i].rport = 0;
 6391                                 } else if ((twait_block->vtag_block[i].v_tag == tag) &&
 6392                                             (twait_block->vtag_block[i].lport == lport) &&
 6393                                     (twait_block->vtag_block[i].rport == rport)) {
 6394                                         /* Bad tag, sorry :< */
 6395                                         SCTP_INP_INFO_WUNLOCK();
 6396                                         return (0);
 6397                                 }
 6398                         }
 6399                 }
 6400         }
 6401         SCTP_INP_INFO_RUNLOCK();
 6402         return (1);
 6403 }
 6404 
 6405 
 6406 static sctp_assoc_t reneged_asoc_ids[256];
 6407 static uint8_t reneged_at = 0;
 6408 
 6409 
 6410 static void
 6411 sctp_drain_mbufs(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
 6412 {
 6413         /*
 6414          * We must hunt this association for MBUF's past the cumack (i.e.
 6415          * out of order data that we can renege on).
 6416          */
 6417         struct sctp_association *asoc;
 6418         struct sctp_tmit_chunk *chk, *nchk;
 6419         uint32_t cumulative_tsn_p1, tsn;
 6420         struct sctp_queued_to_read *ctl, *nctl;
 6421         int cnt, strmat, gap;
 6422 
 6423         /* We look for anything larger than the cum-ack + 1 */
 6424 
 6425         SCTP_STAT_INCR(sctps_protocol_drain_calls);
 6426         if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) {
 6427                 return;
 6428         }
 6429         asoc = &stcb->asoc;
 6430         if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) {
 6431                 /* none we can reneg on. */
 6432                 return;
 6433         }
 6434         SCTP_STAT_INCR(sctps_protocol_drains_done);
 6435         cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
 6436         cnt = 0;
 6437         /* First look in the re-assembly queue */
 6438         chk = TAILQ_FIRST(&asoc->reasmqueue);
 6439         while (chk) {
 6440                 /* Get the next one */
 6441                 nchk = TAILQ_NEXT(chk, sctp_next);
 6442                 if (compare_with_wrap(chk->rec.data.TSN_seq,
 6443                     cumulative_tsn_p1, MAX_TSN)) {
 6444                         /* Yep it is above cum-ack */
 6445                         cnt++;
 6446                         tsn = chk->rec.data.TSN_seq;
 6447                         if (tsn >= asoc->mapping_array_base_tsn) {
 6448                                 gap = tsn - asoc->mapping_array_base_tsn;
 6449                         } else {
 6450                                 gap = (MAX_TSN - asoc->mapping_array_base_tsn) +
 6451                                     tsn + 1;
 6452                         }
 6453                         asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size);
 6454                         sctp_ucount_decr(asoc->cnt_on_reasm_queue);
 6455                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
 6456                         TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
 6457                         if (chk->data) {
 6458                                 sctp_m_freem(chk->data);
 6459                                 chk->data = NULL;
 6460                         }
 6461                         sctp_free_a_chunk(stcb, chk);
 6462                 }
 6463                 chk = nchk;
 6464         }
 6465         /* Ok that was fun, now we will drain all the inbound streams? */
 6466         for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
 6467                 ctl = TAILQ_FIRST(&asoc->strmin[strmat].inqueue);
 6468                 while (ctl) {
 6469                         nctl = TAILQ_NEXT(ctl, next);
 6470                         if (compare_with_wrap(ctl->sinfo_tsn,
 6471                             cumulative_tsn_p1, MAX_TSN)) {
 6472                                 /* Yep it is above cum-ack */
 6473                                 cnt++;
 6474                                 tsn = ctl->sinfo_tsn;
 6475                                 if (tsn >= asoc->mapping_array_base_tsn) {
 6476                                         gap = tsn -
 6477                                             asoc->mapping_array_base_tsn;
 6478                                 } else {
 6479                                         gap = (MAX_TSN -
 6480                                             asoc->mapping_array_base_tsn) +
 6481                                             tsn + 1;
 6482                                 }
 6483                                 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length);
 6484                                 sctp_ucount_decr(asoc->cnt_on_all_streams);
 6485 
 6486                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array,
 6487                                     gap);
 6488                                 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue,
 6489                                     ctl, next);
 6490                                 if (ctl->data) {
 6491                                         sctp_m_freem(ctl->data);
 6492                                         ctl->data = NULL;
 6493                                 }
 6494                                 sctp_free_remote_addr(ctl->whoFrom);
 6495                                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl);
 6496                                 SCTP_DECR_READQ_COUNT();
 6497                         }
 6498                         ctl = nctl;
 6499                 }
 6500         }
 6501         /*
 6502          * Question, should we go through the delivery queue? The only
 6503          * reason things are on here is the app not reading OR a p-d-api up.
 6504          * An attacker COULD send enough in to initiate the PD-API and then
 6505          * send a bunch of stuff to other streams... these would wind up on
 6506          * the delivery queue.. and then we would not get to them. But in
 6507          * order to do this I then have to back-track and un-deliver
 6508          * sequence numbers in streams.. el-yucko. I think for now we will
 6509          * NOT look at the delivery queue and leave it to be something to
 6510          * consider later. An alternative would be to abort the P-D-API with
 6511          * a notification and then deliver the data.... Or another method
 6512          * might be to keep track of how many times the situation occurs and
 6513          * if we see a possible attack underway just abort the association.
 6514          */
 6515 #ifdef SCTP_DEBUG
 6516         if (cnt) {
 6517                 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt);
 6518         }
 6519 #endif
 6520         if (cnt) {
 6521                 /*
 6522                  * Now do we need to find a new
 6523                  * asoc->highest_tsn_inside_map?
 6524                  */
 6525                 if (asoc->highest_tsn_inside_map >= asoc->mapping_array_base_tsn) {
 6526                         gap = asoc->highest_tsn_inside_map - asoc->mapping_array_base_tsn;
 6527                 } else {
 6528                         gap = (MAX_TSN - asoc->mapping_array_base_tsn) +
 6529                             asoc->highest_tsn_inside_map + 1;
 6530                 }
 6531                 if (gap >= (asoc->mapping_array_size << 3)) {
 6532                         /*
 6533                          * Something bad happened or cum-ack and high were
 6534                          * behind the base, but if so earlier checks should
 6535                          * have found NO data... wierd... we will start at
 6536                          * end of mapping array.
 6537                          */
 6538                         SCTP_PRINTF("Gap was larger than array?? %d set to max:%d maparraymax:%x\n",
 6539                             (int)gap,
 6540                             (int)(asoc->mapping_array_size << 3),
 6541                             (int)asoc->highest_tsn_inside_map);
 6542                         gap = asoc->mapping_array_size << 3;
 6543                 }
 6544                 while (gap > 0) {
 6545                         if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) {
 6546                                 /* found the new highest */
 6547                                 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn + gap;
 6548                                 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MAP_LOGGING_ENABLE) {
 6549                                         sctp_log_map(0, 8, asoc->highest_tsn_inside_map, SCTP_MAP_SLIDE_RESULT);
 6550                                 }
 6551                                 break;
 6552                         }
 6553                         gap--;
 6554                 }
 6555                 if (gap == 0) {
 6556                         /* Nothing left in map */
 6557                         memset(asoc->mapping_array, 0, asoc->mapping_array_size);
 6558                         asoc->mapping_array_base_tsn = asoc->cumulative_tsn + 1;
 6559                         asoc->highest_tsn_inside_map = asoc->cumulative_tsn;
 6560                         if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MAP_LOGGING_ENABLE) {
 6561                                 sctp_log_map(0, 9, asoc->highest_tsn_inside_map, SCTP_MAP_SLIDE_RESULT);
 6562                         }
 6563                 }
 6564                 asoc->last_revoke_count = cnt;
 6565                 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
 6566                 /* sa_ignore NO_NULL_CHK */
 6567                 sctp_send_sack(stcb);
 6568                 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED);
 6569                 reneged_asoc_ids[reneged_at] = sctp_get_associd(stcb);
 6570                 reneged_at++;
 6571         }
 6572         /*
 6573          * Another issue, in un-setting the TSN's in the mapping array we
 6574          * DID NOT adjust the higest_tsn marker.  This will cause one of two
 6575          * things to occur. It may cause us to do extra work in checking for
 6576          * our mapping array movement. More importantly it may cause us to
 6577          * SACK every datagram. This may not be a bad thing though since we
 6578          * will recover once we get our cum-ack above and all this stuff we
 6579          * dumped recovered.
 6580          */
 6581 }
 6582 
 6583 void
 6584 sctp_drain()
 6585 {
 6586         /*
 6587          * We must walk the PCB lists for ALL associations here. The system
 6588          * is LOW on MBUF's and needs help. This is where reneging will
 6589          * occur. We really hope this does NOT happen!
 6590          */
 6591         struct sctp_inpcb *inp;
 6592         struct sctp_tcb *stcb;
 6593 
 6594         SCTP_INP_INFO_RLOCK();
 6595         LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) {
 6596                 /* For each endpoint */
 6597                 SCTP_INP_RLOCK(inp);
 6598                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
 6599                         /* For each association */
 6600                         SCTP_TCB_LOCK(stcb);
 6601                         sctp_drain_mbufs(inp, stcb);
 6602                         SCTP_TCB_UNLOCK(stcb);
 6603                 }
 6604                 SCTP_INP_RUNLOCK(inp);
 6605         }
 6606         SCTP_INP_INFO_RUNLOCK();
 6607 }
 6608 
 6609 /*
 6610  * start a new iterator
 6611  * iterates through all endpoints and associations based on the pcb_state
 6612  * flags and asoc_state.  "af" (mandatory) is executed for all matching
 6613  * assocs and "ef" (optional) is executed when the iterator completes.
 6614  * "inpf" (optional) is executed for each new endpoint as it is being
 6615  * iterated through. inpe (optional) is called when the inp completes
 6616  * its way through all the stcbs.
 6617  */
 6618 int
 6619 sctp_initiate_iterator(inp_func inpf,
 6620     asoc_func af,
 6621     inp_func inpe,
 6622     uint32_t pcb_state,
 6623     uint32_t pcb_features,
 6624     uint32_t asoc_state,
 6625     void *argp,
 6626     uint32_t argi,
 6627     end_func ef,
 6628     struct sctp_inpcb *s_inp,
 6629     uint8_t chunk_output_off)
 6630 {
 6631         struct sctp_iterator *it = NULL;
 6632 
 6633         if (af == NULL) {
 6634                 return (-1);
 6635         }
 6636         SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator),
 6637             SCTP_M_ITER);
 6638         if (it == NULL) {
 6639                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
 6640                 return (ENOMEM);
 6641         }
 6642         memset(it, 0, sizeof(*it));
 6643         it->function_assoc = af;
 6644         it->function_inp = inpf;
 6645         if (inpf)
 6646                 it->done_current_ep = 0;
 6647         else
 6648                 it->done_current_ep = 1;
 6649         it->function_atend = ef;
 6650         it->pointer = argp;
 6651         it->val = argi;
 6652         it->pcb_flags = pcb_state;
 6653         it->pcb_features = pcb_features;
 6654         it->asoc_state = asoc_state;
 6655         it->function_inp_end = inpe;
 6656         it->no_chunk_output = chunk_output_off;
 6657         if (s_inp) {
 6658                 it->inp = s_inp;
 6659                 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
 6660         } else {
 6661                 SCTP_INP_INFO_RLOCK();
 6662                 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead));
 6663 
 6664                 SCTP_INP_INFO_RUNLOCK();
 6665                 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
 6666 
 6667         }
 6668         SCTP_IPI_ITERATOR_WQ_LOCK();
 6669         if (it->inp) {
 6670                 SCTP_INP_INCR_REF(it->inp);
 6671         }
 6672         TAILQ_INSERT_TAIL(&SCTP_BASE_INFO(iteratorhead), it, sctp_nxt_itr);
 6673 #if defined(SCTP_USE_THREAD_BASED_ITERATOR)
 6674         if (SCTP_BASE_INFO(iterator_running) == 0) {
 6675                 sctp_wakeup_iterator();
 6676         }
 6677         SCTP_IPI_ITERATOR_WQ_UNLOCK();
 6678 #else
 6679         if (it->inp)
 6680                 SCTP_INP_DECR_REF(it->inp);
 6681         SCTP_IPI_ITERATOR_WQ_UNLOCK();
 6682         /* Init the timer */
 6683         SCTP_OS_TIMER_INIT(&it->tmr.timer);
 6684         /* add to the list of all iterators */
 6685         sctp_timer_start(SCTP_TIMER_TYPE_ITERATOR, (struct sctp_inpcb *)it,
 6686             NULL, NULL);
 6687 #endif
 6688         /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */
 6689         return (0);
 6690 }

Cache object: 7e9d28c4d20c3be4b88cac893691a942


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