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  * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
    4  * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
    5  *
    6  * Redistribution and use in source and binary forms, with or without
    7  * modification, are permitted provided that the following conditions are met:
    8  *
    9  * a) Redistributions of source code must retain the above copyright notice,
   10  *    this list of conditions and the following disclaimer.
   11  *
   12  * b) Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in
   14  *    the documentation and/or other materials provided with the distribution.
   15  *
   16  * c) Neither the name of Cisco Systems, Inc. nor the names of its
   17  *    contributors may be used to endorse or promote products derived
   18  *    from this software without specific prior written permission.
   19  *
   20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   21  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
   22  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   23  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
   24  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   25  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   26  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   27  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   28  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   29  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
   30  * THE POSSIBILITY OF SUCH DAMAGE.
   31  */
   32 
   33 #include <sys/cdefs.h>
   34 __FBSDID("$FreeBSD: releng/11.0/sys/netinet/sctp_pcb.c 303956 2016-08-11 10:14:03Z 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/sctp_dtrace_define.h>
   49 #if defined(INET) || defined(INET6)
   50 #include <netinet/udp.h>
   51 #endif
   52 #ifdef INET6
   53 #include <netinet6/ip6_var.h>
   54 #endif
   55 #include <sys/sched.h>
   56 #include <sys/smp.h>
   57 #include <sys/unistd.h>
   58 
   59 
   60 VNET_DEFINE(struct sctp_base_info, system_base_info);
   61 
   62 /* FIX: we don't handle multiple link local scopes */
   63 /* "scopeless" replacement IN6_ARE_ADDR_EQUAL */
   64 #ifdef INET6
   65 int
   66 SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 *a, struct sockaddr_in6 *b)
   67 {
   68         struct sockaddr_in6 tmp_a, tmp_b;
   69 
   70         memcpy(&tmp_a, a, sizeof(struct sockaddr_in6));
   71         if (sa6_embedscope(&tmp_a, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
   72                 return (0);
   73         }
   74         memcpy(&tmp_b, b, sizeof(struct sockaddr_in6));
   75         if (sa6_embedscope(&tmp_b, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
   76                 return (0);
   77         }
   78         return (IN6_ARE_ADDR_EQUAL(&tmp_a.sin6_addr, &tmp_b.sin6_addr));
   79 }
   80 
   81 #endif
   82 
   83 void
   84 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb)
   85 {
   86         /*
   87          * We really don't need to lock this, but I will just because it
   88          * does not hurt.
   89          */
   90         SCTP_INP_INFO_RLOCK();
   91         spcb->ep_count = SCTP_BASE_INFO(ipi_count_ep);
   92         spcb->asoc_count = SCTP_BASE_INFO(ipi_count_asoc);
   93         spcb->laddr_count = SCTP_BASE_INFO(ipi_count_laddr);
   94         spcb->raddr_count = SCTP_BASE_INFO(ipi_count_raddr);
   95         spcb->chk_count = SCTP_BASE_INFO(ipi_count_chunk);
   96         spcb->readq_count = SCTP_BASE_INFO(ipi_count_readq);
   97         spcb->stream_oque = SCTP_BASE_INFO(ipi_count_strmoq);
   98         spcb->free_chunks = SCTP_BASE_INFO(ipi_free_chunks);
   99         SCTP_INP_INFO_RUNLOCK();
  100 }
  101 
  102 /*-
  103  * Addresses are added to VRF's (Virtual Router's). For BSD we
  104  * have only the default VRF 0. We maintain a hash list of
  105  * VRF's. Each VRF has its own list of sctp_ifn's. Each of
  106  * these has a list of addresses. When we add a new address
  107  * to a VRF we lookup the ifn/ifn_index, if the ifn does
  108  * not exist we create it and add it to the list of IFN's
  109  * within the VRF. Once we have the sctp_ifn, we add the
  110  * address to the list. So we look something like:
  111  *
  112  * hash-vrf-table
  113  *   vrf-> ifn-> ifn -> ifn
  114  *   vrf    |
  115  *    ...   +--ifa-> ifa -> ifa
  116  *   vrf
  117  *
  118  * We keep these separate lists since the SCTP subsystem will
  119  * point to these from its source address selection nets structure.
  120  * When an address is deleted it does not happen right away on
  121  * the SCTP side, it gets scheduled. What we do when a
  122  * delete happens is immediately remove the address from
  123  * the master list and decrement the refcount. As our
  124  * addip iterator works through and frees the src address
  125  * selection pointing to the sctp_ifa, eventually the refcount
  126  * will reach 0 and we will delete it. Note that it is assumed
  127  * that any locking on system level ifn/ifa is done at the
  128  * caller of these functions and these routines will only
  129  * lock the SCTP structures as they add or delete things.
  130  *
  131  * Other notes on VRF concepts.
  132  *  - An endpoint can be in multiple VRF's
  133  *  - An association lives within a VRF and only one VRF.
  134  *  - Any incoming packet we can deduce the VRF for by
  135  *    looking at the mbuf/pak inbound (for BSD its VRF=0 :D)
  136  *  - Any downward send call or connect call must supply the
  137  *    VRF via ancillary data or via some sort of set default
  138  *    VRF socket option call (again for BSD no brainer since
  139  *    the VRF is always 0).
  140  *  - An endpoint may add multiple VRF's to it.
  141  *  - Listening sockets can accept associations in any
  142  *    of the VRF's they are in but the assoc will end up
  143  *    in only one VRF (gotten from the packet or connect/send).
  144  *
  145  */
  146 
  147 struct sctp_vrf *
  148 sctp_allocate_vrf(int vrf_id)
  149 {
  150         struct sctp_vrf *vrf = NULL;
  151         struct sctp_vrflist *bucket;
  152 
  153         /* First allocate the VRF structure */
  154         vrf = sctp_find_vrf(vrf_id);
  155         if (vrf) {
  156                 /* Already allocated */
  157                 return (vrf);
  158         }
  159         SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf),
  160             SCTP_M_VRF);
  161         if (vrf == NULL) {
  162                 /* No memory */
  163 #ifdef INVARIANTS
  164                 panic("No memory for VRF:%d", vrf_id);
  165 #endif
  166                 return (NULL);
  167         }
  168         /* setup the VRF */
  169         memset(vrf, 0, sizeof(struct sctp_vrf));
  170         vrf->vrf_id = vrf_id;
  171         LIST_INIT(&vrf->ifnlist);
  172         vrf->total_ifa_count = 0;
  173         vrf->refcount = 0;
  174         /* now also setup table ids */
  175         SCTP_INIT_VRF_TABLEID(vrf);
  176         /* Init the HASH of addresses */
  177         vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE,
  178             &vrf->vrf_addr_hashmark);
  179         if (vrf->vrf_addr_hash == NULL) {
  180                 /* No memory */
  181 #ifdef INVARIANTS
  182                 panic("No memory for VRF:%d", vrf_id);
  183 #endif
  184                 SCTP_FREE(vrf, SCTP_M_VRF);
  185                 return (NULL);
  186         }
  187         /* Add it to the hash table */
  188         bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
  189         LIST_INSERT_HEAD(bucket, vrf, next_vrf);
  190         atomic_add_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
  191         return (vrf);
  192 }
  193 
  194 
  195 struct sctp_ifn *
  196 sctp_find_ifn(void *ifn, uint32_t ifn_index)
  197 {
  198         struct sctp_ifn *sctp_ifnp;
  199         struct sctp_ifnlist *hash_ifn_head;
  200 
  201         /*
  202          * We assume the lock is held for the addresses if that's wrong
  203          * problems could occur :-)
  204          */
  205         hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
  206         LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) {
  207                 if (sctp_ifnp->ifn_index == ifn_index) {
  208                         return (sctp_ifnp);
  209                 }
  210                 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) {
  211                         return (sctp_ifnp);
  212                 }
  213         }
  214         return (NULL);
  215 }
  216 
  217 
  218 struct sctp_vrf *
  219 sctp_find_vrf(uint32_t vrf_id)
  220 {
  221         struct sctp_vrflist *bucket;
  222         struct sctp_vrf *liste;
  223 
  224         bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
  225         LIST_FOREACH(liste, bucket, next_vrf) {
  226                 if (vrf_id == liste->vrf_id) {
  227                         return (liste);
  228                 }
  229         }
  230         return (NULL);
  231 }
  232 
  233 
  234 void
  235 sctp_free_vrf(struct sctp_vrf *vrf)
  236 {
  237         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) {
  238                 if (vrf->vrf_addr_hash) {
  239                         SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
  240                         vrf->vrf_addr_hash = NULL;
  241                 }
  242                 /* We zero'd the count */
  243                 LIST_REMOVE(vrf, next_vrf);
  244                 SCTP_FREE(vrf, SCTP_M_VRF);
  245                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
  246         }
  247 }
  248 
  249 
  250 void
  251 sctp_free_ifn(struct sctp_ifn *sctp_ifnp)
  252 {
  253         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) {
  254                 /* We zero'd the count */
  255                 if (sctp_ifnp->vrf) {
  256                         sctp_free_vrf(sctp_ifnp->vrf);
  257                 }
  258                 SCTP_FREE(sctp_ifnp, SCTP_M_IFN);
  259                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
  260         }
  261 }
  262 
  263 
  264 void
  265 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu)
  266 {
  267         struct sctp_ifn *sctp_ifnp;
  268 
  269         sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index);
  270         if (sctp_ifnp != NULL) {
  271                 sctp_ifnp->ifn_mtu = mtu;
  272         }
  273 }
  274 
  275 
  276 void
  277 sctp_free_ifa(struct sctp_ifa *sctp_ifap)
  278 {
  279         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) {
  280                 /* We zero'd the count */
  281                 if (sctp_ifap->ifn_p) {
  282                         sctp_free_ifn(sctp_ifap->ifn_p);
  283                 }
  284                 SCTP_FREE(sctp_ifap, SCTP_M_IFA);
  285                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
  286         }
  287 }
  288 
  289 
  290 static void
  291 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock)
  292 {
  293         struct sctp_ifn *found;
  294 
  295         found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index);
  296         if (found == NULL) {
  297                 /* Not in the list.. sorry */
  298                 return;
  299         }
  300         if (hold_addr_lock == 0)
  301                 SCTP_IPI_ADDR_WLOCK();
  302         LIST_REMOVE(sctp_ifnp, next_bucket);
  303         LIST_REMOVE(sctp_ifnp, next_ifn);
  304         SCTP_DEREGISTER_INTERFACE(sctp_ifnp->ifn_index,
  305             sctp_ifnp->registered_af);
  306         if (hold_addr_lock == 0)
  307                 SCTP_IPI_ADDR_WUNLOCK();
  308         /* Take away the reference, and possibly free it */
  309         sctp_free_ifn(sctp_ifnp);
  310 }
  311 
  312 
  313 void
  314 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr,
  315     const char *if_name, uint32_t ifn_index)
  316 {
  317         struct sctp_vrf *vrf;
  318         struct sctp_ifa *sctp_ifap;
  319 
  320         SCTP_IPI_ADDR_RLOCK();
  321         vrf = sctp_find_vrf(vrf_id);
  322         if (vrf == NULL) {
  323                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
  324                 goto out;
  325 
  326         }
  327         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
  328         if (sctp_ifap == NULL) {
  329                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
  330                 goto out;
  331         }
  332         if (sctp_ifap->ifn_p == NULL) {
  333                 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unusable\n");
  334                 goto out;
  335         }
  336         if (if_name) {
  337                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) {
  338                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
  339                             sctp_ifap->ifn_p->ifn_name, if_name);
  340                         goto out;
  341                 }
  342         } else {
  343                 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
  344                         SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
  345                             sctp_ifap->ifn_p->ifn_index, ifn_index);
  346                         goto out;
  347                 }
  348         }
  349 
  350         sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID);
  351         sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE;
  352 out:
  353         SCTP_IPI_ADDR_RUNLOCK();
  354 }
  355 
  356 
  357 void
  358 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr,
  359     const char *if_name, uint32_t ifn_index)
  360 {
  361         struct sctp_vrf *vrf;
  362         struct sctp_ifa *sctp_ifap;
  363 
  364         SCTP_IPI_ADDR_RLOCK();
  365         vrf = sctp_find_vrf(vrf_id);
  366         if (vrf == NULL) {
  367                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
  368                 goto out;
  369 
  370         }
  371         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
  372         if (sctp_ifap == NULL) {
  373                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
  374                 goto out;
  375         }
  376         if (sctp_ifap->ifn_p == NULL) {
  377                 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unusable\n");
  378                 goto out;
  379         }
  380         if (if_name) {
  381                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) {
  382                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
  383                             sctp_ifap->ifn_p->ifn_name, if_name);
  384                         goto out;
  385                 }
  386         } else {
  387                 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
  388                         SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
  389                             sctp_ifap->ifn_p->ifn_index, ifn_index);
  390                         goto out;
  391                 }
  392         }
  393 
  394         sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE);
  395         sctp_ifap->localifa_flags |= SCTP_ADDR_VALID;
  396 out:
  397         SCTP_IPI_ADDR_RUNLOCK();
  398 }
  399 
  400 
  401 /*-
  402  * Add an ifa to an ifn.
  403  * Register the interface as necessary.
  404  * NOTE: ADDR write lock MUST be held.
  405  */
  406 static void
  407 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap)
  408 {
  409         int ifa_af;
  410 
  411         LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
  412         sctp_ifap->ifn_p = sctp_ifnp;
  413         atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
  414         /* update address counts */
  415         sctp_ifnp->ifa_count++;
  416         ifa_af = sctp_ifap->address.sa.sa_family;
  417         switch (ifa_af) {
  418 #ifdef INET
  419         case AF_INET:
  420                 sctp_ifnp->num_v4++;
  421                 break;
  422 #endif
  423 #ifdef INET6
  424         case AF_INET6:
  425                 sctp_ifnp->num_v6++;
  426                 break;
  427 #endif
  428         default:
  429                 break;
  430         }
  431         if (sctp_ifnp->ifa_count == 1) {
  432                 /* register the new interface */
  433                 SCTP_REGISTER_INTERFACE(sctp_ifnp->ifn_index, ifa_af);
  434                 sctp_ifnp->registered_af = ifa_af;
  435         }
  436 }
  437 
  438 
  439 /*-
  440  * Remove an ifa from its ifn.
  441  * If no more addresses exist, remove the ifn too. Otherwise, re-register
  442  * the interface based on the remaining address families left.
  443  * NOTE: ADDR write lock MUST be held.
  444  */
  445 static void
  446 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap)
  447 {
  448         LIST_REMOVE(sctp_ifap, next_ifa);
  449         if (sctp_ifap->ifn_p) {
  450                 /* update address counts */
  451                 sctp_ifap->ifn_p->ifa_count--;
  452                 switch (sctp_ifap->address.sa.sa_family) {
  453 #ifdef INET
  454                 case AF_INET:
  455                         sctp_ifap->ifn_p->num_v4--;
  456                         break;
  457 #endif
  458 #ifdef INET6
  459                 case AF_INET6:
  460                         sctp_ifap->ifn_p->num_v6--;
  461                         break;
  462 #endif
  463                 default:
  464                         break;
  465                 }
  466 
  467                 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) {
  468                         /* remove the ifn, possibly freeing it */
  469                         sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED);
  470                 } else {
  471                         /* re-register address family type, if needed */
  472                         if ((sctp_ifap->ifn_p->num_v6 == 0) &&
  473                             (sctp_ifap->ifn_p->registered_af == AF_INET6)) {
  474                                 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6);
  475                                 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET);
  476                                 sctp_ifap->ifn_p->registered_af = AF_INET;
  477                         } else if ((sctp_ifap->ifn_p->num_v4 == 0) &&
  478                             (sctp_ifap->ifn_p->registered_af == AF_INET)) {
  479                                 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET);
  480                                 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6);
  481                                 sctp_ifap->ifn_p->registered_af = AF_INET6;
  482                         }
  483                         /* free the ifn refcount */
  484                         sctp_free_ifn(sctp_ifap->ifn_p);
  485                 }
  486                 sctp_ifap->ifn_p = NULL;
  487         }
  488 }
  489 
  490 
  491 struct sctp_ifa *
  492 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index,
  493     uint32_t ifn_type, const char *if_name, void *ifa,
  494     struct sockaddr *addr, uint32_t ifa_flags,
  495     int dynamic_add)
  496 {
  497         struct sctp_vrf *vrf;
  498         struct sctp_ifn *sctp_ifnp = NULL;
  499         struct sctp_ifa *sctp_ifap = NULL;
  500         struct sctp_ifalist *hash_addr_head;
  501         struct sctp_ifnlist *hash_ifn_head;
  502         uint32_t hash_of_addr;
  503         int new_ifn_af = 0;
  504 
  505 #ifdef SCTP_DEBUG
  506         SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id);
  507         SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
  508 #endif
  509         SCTP_IPI_ADDR_WLOCK();
  510         sctp_ifnp = sctp_find_ifn(ifn, ifn_index);
  511         if (sctp_ifnp) {
  512                 vrf = sctp_ifnp->vrf;
  513         } else {
  514                 vrf = sctp_find_vrf(vrf_id);
  515                 if (vrf == NULL) {
  516                         vrf = sctp_allocate_vrf(vrf_id);
  517                         if (vrf == NULL) {
  518                                 SCTP_IPI_ADDR_WUNLOCK();
  519                                 return (NULL);
  520                         }
  521                 }
  522         }
  523         if (sctp_ifnp == NULL) {
  524                 /*
  525                  * build one and add it, can't hold lock until after malloc
  526                  * done though.
  527                  */
  528                 SCTP_IPI_ADDR_WUNLOCK();
  529                 SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *,
  530                     sizeof(struct sctp_ifn), SCTP_M_IFN);
  531                 if (sctp_ifnp == NULL) {
  532 #ifdef INVARIANTS
  533                         panic("No memory for IFN");
  534 #endif
  535                         return (NULL);
  536                 }
  537                 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn));
  538                 sctp_ifnp->ifn_index = ifn_index;
  539                 sctp_ifnp->ifn_p = ifn;
  540                 sctp_ifnp->ifn_type = ifn_type;
  541                 sctp_ifnp->refcount = 0;
  542                 sctp_ifnp->vrf = vrf;
  543                 atomic_add_int(&vrf->refcount, 1);
  544                 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family);
  545                 if (if_name != NULL) {
  546                         snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", if_name);
  547                 } else {
  548                         snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", "unknown");
  549                 }
  550                 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
  551                 LIST_INIT(&sctp_ifnp->ifalist);
  552                 SCTP_IPI_ADDR_WLOCK();
  553                 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket);
  554                 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn);
  555                 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
  556                 new_ifn_af = 1;
  557         }
  558         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
  559         if (sctp_ifap) {
  560                 /* Hmm, it already exists? */
  561                 if ((sctp_ifap->ifn_p) &&
  562                     (sctp_ifap->ifn_p->ifn_index == ifn_index)) {
  563                         SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n",
  564                             sctp_ifap->ifn_p->ifn_name, ifn_index,
  565                             (void *)sctp_ifap);
  566                         if (new_ifn_af) {
  567                                 /* Remove the created one that we don't want */
  568                                 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED);
  569                         }
  570                         if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) {
  571                                 /* easy to solve, just switch back to active */
  572                                 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n");
  573                                 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
  574                                 sctp_ifap->ifn_p = sctp_ifnp;
  575                                 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
  576                         }
  577         exit_stage_left:
  578                         SCTP_IPI_ADDR_WUNLOCK();
  579                         return (sctp_ifap);
  580                 } else {
  581                         if (sctp_ifap->ifn_p) {
  582                                 /*
  583                                  * The last IFN gets the address, remove the
  584                                  * old one
  585                                  */
  586                                 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n",
  587                                     (void *)sctp_ifap, sctp_ifap->ifn_p->ifn_name,
  588                                     sctp_ifap->ifn_p->ifn_index, if_name,
  589                                     ifn_index);
  590                                 /* remove the address from the old ifn */
  591                                 sctp_remove_ifa_from_ifn(sctp_ifap);
  592                                 /* move the address over to the new ifn */
  593                                 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
  594                                 goto exit_stage_left;
  595                         } else {
  596                                 /* repair ifnp which was NULL ? */
  597                                 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
  598                                 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n",
  599                                     (void *)sctp_ifnp, (void *)sctp_ifap);
  600                                 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
  601                         }
  602                         goto exit_stage_left;
  603                 }
  604         }
  605         SCTP_IPI_ADDR_WUNLOCK();
  606         SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA);
  607         if (sctp_ifap == NULL) {
  608 #ifdef INVARIANTS
  609                 panic("No memory for IFA");
  610 #endif
  611                 return (NULL);
  612         }
  613         memset(sctp_ifap, 0, sizeof(struct sctp_ifa));
  614         sctp_ifap->ifn_p = sctp_ifnp;
  615         atomic_add_int(&sctp_ifnp->refcount, 1);
  616         sctp_ifap->vrf_id = vrf_id;
  617         sctp_ifap->ifa = ifa;
  618         memcpy(&sctp_ifap->address, addr, addr->sa_len);
  619         sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE;
  620         sctp_ifap->flags = ifa_flags;
  621         /* Set scope */
  622         switch (sctp_ifap->address.sa.sa_family) {
  623 #ifdef INET
  624         case AF_INET:
  625                 {
  626                         struct sockaddr_in *sin;
  627 
  628                         sin = &sctp_ifap->address.sin;
  629                         if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
  630                             (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) {
  631                                 sctp_ifap->src_is_loop = 1;
  632                         }
  633                         if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
  634                                 sctp_ifap->src_is_priv = 1;
  635                         }
  636                         sctp_ifnp->num_v4++;
  637                         if (new_ifn_af)
  638                                 new_ifn_af = AF_INET;
  639                         break;
  640                 }
  641 #endif
  642 #ifdef INET6
  643         case AF_INET6:
  644                 {
  645                         /* ok to use deprecated addresses? */
  646                         struct sockaddr_in6 *sin6;
  647 
  648                         sin6 = &sctp_ifap->address.sin6;
  649                         if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
  650                             (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) {
  651                                 sctp_ifap->src_is_loop = 1;
  652                         }
  653                         if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
  654                                 sctp_ifap->src_is_priv = 1;
  655                         }
  656                         sctp_ifnp->num_v6++;
  657                         if (new_ifn_af)
  658                                 new_ifn_af = AF_INET6;
  659                         break;
  660                 }
  661 #endif
  662         default:
  663                 new_ifn_af = 0;
  664                 break;
  665         }
  666         hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa);
  667 
  668         if ((sctp_ifap->src_is_priv == 0) &&
  669             (sctp_ifap->src_is_loop == 0)) {
  670                 sctp_ifap->src_is_glob = 1;
  671         }
  672         SCTP_IPI_ADDR_WLOCK();
  673         hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)];
  674         LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket);
  675         sctp_ifap->refcount = 1;
  676         LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
  677         sctp_ifnp->ifa_count++;
  678         vrf->total_ifa_count++;
  679         atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
  680         if (new_ifn_af) {
  681                 SCTP_REGISTER_INTERFACE(ifn_index, new_ifn_af);
  682                 sctp_ifnp->registered_af = new_ifn_af;
  683         }
  684         SCTP_IPI_ADDR_WUNLOCK();
  685         if (dynamic_add) {
  686                 /*
  687                  * Bump up the refcount so that when the timer completes it
  688                  * will drop back down.
  689                  */
  690                 struct sctp_laddr *wi;
  691 
  692                 atomic_add_int(&sctp_ifap->refcount, 1);
  693                 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
  694                 if (wi == NULL) {
  695                         /*
  696                          * Gak, what can we do? We have lost an address
  697                          * change can you say HOSED?
  698                          */
  699                         SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
  700                         /* Opps, must decrement the count */
  701                         sctp_del_addr_from_vrf(vrf_id, addr, ifn_index,
  702                             if_name);
  703                         return (NULL);
  704                 }
  705                 SCTP_INCR_LADDR_COUNT();
  706                 bzero(wi, sizeof(*wi));
  707                 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
  708                 wi->ifa = sctp_ifap;
  709                 wi->action = SCTP_ADD_IP_ADDRESS;
  710 
  711                 SCTP_WQ_ADDR_LOCK();
  712                 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
  713                 SCTP_WQ_ADDR_UNLOCK();
  714 
  715                 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
  716                     (struct sctp_inpcb *)NULL,
  717                     (struct sctp_tcb *)NULL,
  718                     (struct sctp_nets *)NULL);
  719         } else {
  720                 /* it's ready for use */
  721                 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
  722         }
  723         return (sctp_ifap);
  724 }
  725 
  726 void
  727 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr,
  728     uint32_t ifn_index, const char *if_name)
  729 {
  730         struct sctp_vrf *vrf;
  731         struct sctp_ifa *sctp_ifap = NULL;
  732 
  733         SCTP_IPI_ADDR_WLOCK();
  734         vrf = sctp_find_vrf(vrf_id);
  735         if (vrf == NULL) {
  736                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
  737                 goto out_now;
  738         }
  739 #ifdef SCTP_DEBUG
  740         SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id);
  741         SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
  742 #endif
  743         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
  744         if (sctp_ifap) {
  745                 /* Validate the delete */
  746                 if (sctp_ifap->ifn_p) {
  747                         int valid = 0;
  748 
  749                         /*-
  750                          * The name has priority over the ifn_index
  751                          * if its given. We do this especially for
  752                          * panda who might recycle indexes fast.
  753                          */
  754                         if (if_name) {
  755                                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) == 0) {
  756                                         /* They match its a correct delete */
  757                                         valid = 1;
  758                                 }
  759                         }
  760                         if (!valid) {
  761                                 /* last ditch check ifn_index */
  762                                 if (ifn_index == sctp_ifap->ifn_p->ifn_index) {
  763                                         valid = 1;
  764                                 }
  765                         }
  766                         if (!valid) {
  767                                 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n",
  768                                     ifn_index, ((if_name == NULL) ? "NULL" : if_name));
  769                                 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n",
  770                                     sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name);
  771                                 SCTP_IPI_ADDR_WUNLOCK();
  772                                 return;
  773                         }
  774                 }
  775                 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", (void *)sctp_ifap);
  776                 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID;
  777                 /*
  778                  * We don't set the flag. This means that the structure will
  779                  * hang around in EP's that have bound specific to it until
  780                  * they close. This gives us TCP like behavior if someone
  781                  * removes an address (or for that matter adds it right
  782                  * back).
  783                  */
  784                 /* sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; */
  785                 vrf->total_ifa_count--;
  786                 LIST_REMOVE(sctp_ifap, next_bucket);
  787                 sctp_remove_ifa_from_ifn(sctp_ifap);
  788         }
  789 #ifdef SCTP_DEBUG
  790         else {
  791                 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:",
  792                     ifn_index);
  793                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
  794         }
  795 #endif
  796 
  797 out_now:
  798         SCTP_IPI_ADDR_WUNLOCK();
  799         if (sctp_ifap) {
  800                 struct sctp_laddr *wi;
  801 
  802                 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
  803                 if (wi == NULL) {
  804                         /*
  805                          * Gak, what can we do? We have lost an address
  806                          * change can you say HOSED?
  807                          */
  808                         SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
  809 
  810                         /* Oops, must decrement the count */
  811                         sctp_free_ifa(sctp_ifap);
  812                         return;
  813                 }
  814                 SCTP_INCR_LADDR_COUNT();
  815                 bzero(wi, sizeof(*wi));
  816                 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
  817                 wi->ifa = sctp_ifap;
  818                 wi->action = SCTP_DEL_IP_ADDRESS;
  819                 SCTP_WQ_ADDR_LOCK();
  820                 /*
  821                  * Should this really be a tailq? As it is we will process
  822                  * the newest first :-0
  823                  */
  824                 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
  825                 SCTP_WQ_ADDR_UNLOCK();
  826 
  827                 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
  828                     (struct sctp_inpcb *)NULL,
  829                     (struct sctp_tcb *)NULL,
  830                     (struct sctp_nets *)NULL);
  831         }
  832         return;
  833 }
  834 
  835 
  836 static int
  837 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to)
  838 {
  839         int loopback_scope;
  840 
  841 #if defined(INET)
  842         int ipv4_local_scope, ipv4_addr_legal;
  843 
  844 #endif
  845 #if defined(INET6)
  846         int local_scope, site_scope, ipv6_addr_legal;
  847 
  848 #endif
  849         struct sctp_vrf *vrf;
  850         struct sctp_ifn *sctp_ifn;
  851         struct sctp_ifa *sctp_ifa;
  852 
  853         loopback_scope = stcb->asoc.scope.loopback_scope;
  854 #if defined(INET)
  855         ipv4_local_scope = stcb->asoc.scope.ipv4_local_scope;
  856         ipv4_addr_legal = stcb->asoc.scope.ipv4_addr_legal;
  857 #endif
  858 #if defined(INET6)
  859         local_scope = stcb->asoc.scope.local_scope;
  860         site_scope = stcb->asoc.scope.site_scope;
  861         ipv6_addr_legal = stcb->asoc.scope.ipv6_addr_legal;
  862 #endif
  863 
  864         SCTP_IPI_ADDR_RLOCK();
  865         vrf = sctp_find_vrf(stcb->asoc.vrf_id);
  866         if (vrf == NULL) {
  867                 /* no vrf, no addresses */
  868                 SCTP_IPI_ADDR_RUNLOCK();
  869                 return (0);
  870         }
  871         if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
  872                 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
  873                         if ((loopback_scope == 0) &&
  874                             SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
  875                                 continue;
  876                         }
  877                         LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
  878                                 if (sctp_is_addr_restricted(stcb, sctp_ifa) &&
  879                                     (!sctp_is_addr_pending(stcb, sctp_ifa))) {
  880                                         /*
  881                                          * We allow pending addresses, where
  882                                          * we have sent an asconf-add to be
  883                                          * considered valid.
  884                                          */
  885                                         continue;
  886                                 }
  887                                 if (sctp_ifa->address.sa.sa_family != to->sa_family) {
  888                                         continue;
  889                                 }
  890                                 switch (sctp_ifa->address.sa.sa_family) {
  891 #ifdef INET
  892                                 case AF_INET:
  893                                         if (ipv4_addr_legal) {
  894                                                 struct sockaddr_in *sin,
  895                                                            *rsin;
  896 
  897                                                 sin = &sctp_ifa->address.sin;
  898                                                 rsin = (struct sockaddr_in *)to;
  899                                                 if ((ipv4_local_scope == 0) &&
  900                                                     IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
  901                                                         continue;
  902                                                 }
  903                                                 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred,
  904                                                     &sin->sin_addr) != 0) {
  905                                                         continue;
  906                                                 }
  907                                                 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
  908                                                         SCTP_IPI_ADDR_RUNLOCK();
  909                                                         return (1);
  910                                                 }
  911                                         }
  912                                         break;
  913 #endif
  914 #ifdef INET6
  915                                 case AF_INET6:
  916                                         if (ipv6_addr_legal) {
  917                                                 struct sockaddr_in6 *sin6,
  918                                                             *rsin6;
  919 
  920                                                 sin6 = &sctp_ifa->address.sin6;
  921                                                 rsin6 = (struct sockaddr_in6 *)to;
  922                                                 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred,
  923                                                     &sin6->sin6_addr) != 0) {
  924                                                         continue;
  925                                                 }
  926                                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
  927                                                         if (local_scope == 0)
  928                                                                 continue;
  929                                                         if (sin6->sin6_scope_id == 0) {
  930                                                                 if (sa6_recoverscope(sin6) != 0)
  931                                                                         continue;
  932                                                         }
  933                                                 }
  934                                                 if ((site_scope == 0) &&
  935                                                     (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) {
  936                                                         continue;
  937                                                 }
  938                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
  939                                                         SCTP_IPI_ADDR_RUNLOCK();
  940                                                         return (1);
  941                                                 }
  942                                         }
  943                                         break;
  944 #endif
  945                                 default:
  946                                         /* TSNH */
  947                                         break;
  948                                 }
  949                         }
  950                 }
  951         } else {
  952                 struct sctp_laddr *laddr;
  953 
  954                 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
  955                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
  956                                 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
  957                                 continue;
  958                         }
  959                         if (sctp_is_addr_restricted(stcb, laddr->ifa) &&
  960                             (!sctp_is_addr_pending(stcb, laddr->ifa))) {
  961                                 /*
  962                                  * We allow pending addresses, where we have
  963                                  * sent an asconf-add to be considered
  964                                  * valid.
  965                                  */
  966                                 continue;
  967                         }
  968                         if (laddr->ifa->address.sa.sa_family != to->sa_family) {
  969                                 continue;
  970                         }
  971                         switch (to->sa_family) {
  972 #ifdef INET
  973                         case AF_INET:
  974                                 {
  975                                         struct sockaddr_in *sin, *rsin;
  976 
  977                                         sin = &laddr->ifa->address.sin;
  978                                         rsin = (struct sockaddr_in *)to;
  979                                         if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
  980                                                 SCTP_IPI_ADDR_RUNLOCK();
  981                                                 return (1);
  982                                         }
  983                                         break;
  984                                 }
  985 #endif
  986 #ifdef INET6
  987                         case AF_INET6:
  988                                 {
  989                                         struct sockaddr_in6 *sin6, *rsin6;
  990 
  991                                         sin6 = &laddr->ifa->address.sin6;
  992                                         rsin6 = (struct sockaddr_in6 *)to;
  993                                         if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
  994                                                 SCTP_IPI_ADDR_RUNLOCK();
  995                                                 return (1);
  996                                         }
  997                                         break;
  998                                 }
  999 
 1000 #endif
 1001                         default:
 1002                                 /* TSNH */
 1003                                 break;
 1004                         }
 1005 
 1006                 }
 1007         }
 1008         SCTP_IPI_ADDR_RUNLOCK();
 1009         return (0);
 1010 }
 1011 
 1012 
 1013 static struct sctp_tcb *
 1014 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from,
 1015     struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id)
 1016 {
 1017         /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */
 1018         /*
 1019          * If we support the TCP model, then we must now dig through to see
 1020          * if we can find our endpoint in the list of tcp ep's.
 1021          */
 1022         uint16_t lport, rport;
 1023         struct sctppcbhead *ephead;
 1024         struct sctp_inpcb *inp;
 1025         struct sctp_laddr *laddr;
 1026         struct sctp_tcb *stcb;
 1027         struct sctp_nets *net;
 1028 
 1029         if ((to == NULL) || (from == NULL)) {
 1030                 return (NULL);
 1031         }
 1032         switch (to->sa_family) {
 1033 #ifdef INET
 1034         case AF_INET:
 1035                 if (from->sa_family == AF_INET) {
 1036                         lport = ((struct sockaddr_in *)to)->sin_port;
 1037                         rport = ((struct sockaddr_in *)from)->sin_port;
 1038                 } else {
 1039                         return (NULL);
 1040                 }
 1041                 break;
 1042 #endif
 1043 #ifdef INET6
 1044         case AF_INET6:
 1045                 if (from->sa_family == AF_INET6) {
 1046                         lport = ((struct sockaddr_in6 *)to)->sin6_port;
 1047                         rport = ((struct sockaddr_in6 *)from)->sin6_port;
 1048                 } else {
 1049                         return (NULL);
 1050                 }
 1051                 break;
 1052 #endif
 1053         default:
 1054                 return (NULL);
 1055         }
 1056         ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
 1057         /*
 1058          * Ok now for each of the guys in this bucket we must look and see:
 1059          * - Does the remote port match. - Does there single association's
 1060          * addresses match this address (to). If so we update p_ep to point
 1061          * to this ep and return the tcb from it.
 1062          */
 1063         LIST_FOREACH(inp, ephead, sctp_hash) {
 1064                 SCTP_INP_RLOCK(inp);
 1065                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
 1066                         SCTP_INP_RUNLOCK(inp);
 1067                         continue;
 1068                 }
 1069                 if (lport != inp->sctp_lport) {
 1070                         SCTP_INP_RUNLOCK(inp);
 1071                         continue;
 1072                 }
 1073                 switch (to->sa_family) {
 1074 #ifdef INET
 1075                 case AF_INET:
 1076                         {
 1077                                 struct sockaddr_in *sin;
 1078 
 1079                                 sin = (struct sockaddr_in *)to;
 1080                                 if (prison_check_ip4(inp->ip_inp.inp.inp_cred,
 1081                                     &sin->sin_addr) != 0) {
 1082                                         SCTP_INP_RUNLOCK(inp);
 1083                                         continue;
 1084                                 }
 1085                                 break;
 1086                         }
 1087 #endif
 1088 #ifdef INET6
 1089                 case AF_INET6:
 1090                         {
 1091                                 struct sockaddr_in6 *sin6;
 1092 
 1093                                 sin6 = (struct sockaddr_in6 *)to;
 1094                                 if (prison_check_ip6(inp->ip_inp.inp.inp_cred,
 1095                                     &sin6->sin6_addr) != 0) {
 1096                                         SCTP_INP_RUNLOCK(inp);
 1097                                         continue;
 1098                                 }
 1099                                 break;
 1100                         }
 1101 #endif
 1102                 default:
 1103                         SCTP_INP_RUNLOCK(inp);
 1104                         continue;
 1105                 }
 1106                 if (inp->def_vrf_id != vrf_id) {
 1107                         SCTP_INP_RUNLOCK(inp);
 1108                         continue;
 1109                 }
 1110                 /* check to see if the ep has one of the addresses */
 1111                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
 1112                         /* We are NOT bound all, so look further */
 1113                         int match = 0;
 1114 
 1115                         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
 1116 
 1117                                 if (laddr->ifa == NULL) {
 1118                                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __func__);
 1119                                         continue;
 1120                                 }
 1121                                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
 1122                                         SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
 1123                                         continue;
 1124                                 }
 1125                                 if (laddr->ifa->address.sa.sa_family ==
 1126                                     to->sa_family) {
 1127                                         /* see if it matches */
 1128 #ifdef INET
 1129                                         if (from->sa_family == AF_INET) {
 1130                                                 struct sockaddr_in *intf_addr,
 1131                                                            *sin;
 1132 
 1133                                                 intf_addr = &laddr->ifa->address.sin;
 1134                                                 sin = (struct sockaddr_in *)to;
 1135                                                 if (sin->sin_addr.s_addr ==
 1136                                                     intf_addr->sin_addr.s_addr) {
 1137                                                         match = 1;
 1138                                                         break;
 1139                                                 }
 1140                                         }
 1141 #endif
 1142 #ifdef INET6
 1143                                         if (from->sa_family == AF_INET6) {
 1144                                                 struct sockaddr_in6 *intf_addr6;
 1145                                                 struct sockaddr_in6 *sin6;
 1146 
 1147                                                 sin6 = (struct sockaddr_in6 *)
 1148                                                     to;
 1149                                                 intf_addr6 = &laddr->ifa->address.sin6;
 1150 
 1151                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
 1152                                                     intf_addr6)) {
 1153                                                         match = 1;
 1154                                                         break;
 1155                                                 }
 1156                                         }
 1157 #endif
 1158                                 }
 1159                         }
 1160                         if (match == 0) {
 1161                                 /* This endpoint does not have this address */
 1162                                 SCTP_INP_RUNLOCK(inp);
 1163                                 continue;
 1164                         }
 1165                 }
 1166                 /*
 1167                  * Ok if we hit here the ep has the address, does it hold
 1168                  * the tcb?
 1169                  */
 1170                 /* XXX: Why don't we TAILQ_FOREACH through sctp_asoc_list? */
 1171                 stcb = LIST_FIRST(&inp->sctp_asoc_list);
 1172                 if (stcb == NULL) {
 1173                         SCTP_INP_RUNLOCK(inp);
 1174                         continue;
 1175                 }
 1176                 SCTP_TCB_LOCK(stcb);
 1177                 if (!sctp_does_stcb_own_this_addr(stcb, to)) {
 1178                         SCTP_TCB_UNLOCK(stcb);
 1179                         SCTP_INP_RUNLOCK(inp);
 1180                         continue;
 1181                 }
 1182                 if (stcb->rport != rport) {
 1183                         /* remote port does not match. */
 1184                         SCTP_TCB_UNLOCK(stcb);
 1185                         SCTP_INP_RUNLOCK(inp);
 1186                         continue;
 1187                 }
 1188                 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
 1189                         SCTP_TCB_UNLOCK(stcb);
 1190                         SCTP_INP_RUNLOCK(inp);
 1191                         continue;
 1192                 }
 1193                 if (!sctp_does_stcb_own_this_addr(stcb, to)) {
 1194                         SCTP_TCB_UNLOCK(stcb);
 1195                         SCTP_INP_RUNLOCK(inp);
 1196                         continue;
 1197                 }
 1198                 /* Does this TCB have a matching address? */
 1199                 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 1200 
 1201                         if (net->ro._l_addr.sa.sa_family != from->sa_family) {
 1202                                 /* not the same family, can't be a match */
 1203                                 continue;
 1204                         }
 1205                         switch (from->sa_family) {
 1206 #ifdef INET
 1207                         case AF_INET:
 1208                                 {
 1209                                         struct sockaddr_in *sin, *rsin;
 1210 
 1211                                         sin = (struct sockaddr_in *)&net->ro._l_addr;
 1212                                         rsin = (struct sockaddr_in *)from;
 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                                                 /*
 1220                                                  * Update the endpoint
 1221                                                  * pointer
 1222                                                  */
 1223                                                 *inp_p = inp;
 1224                                                 SCTP_INP_RUNLOCK(inp);
 1225                                                 return (stcb);
 1226                                         }
 1227                                         break;
 1228                                 }
 1229 #endif
 1230 #ifdef INET6
 1231                         case AF_INET6:
 1232                                 {
 1233                                         struct sockaddr_in6 *sin6, *rsin6;
 1234 
 1235                                         sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
 1236                                         rsin6 = (struct sockaddr_in6 *)from;
 1237                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
 1238                                             rsin6)) {
 1239                                                 /* found it */
 1240                                                 if (netp != NULL) {
 1241                                                         *netp = net;
 1242                                                 }
 1243                                                 /*
 1244                                                  * Update the endpoint
 1245                                                  * pointer
 1246                                                  */
 1247                                                 *inp_p = inp;
 1248                                                 SCTP_INP_RUNLOCK(inp);
 1249                                                 return (stcb);
 1250                                         }
 1251                                         break;
 1252                                 }
 1253 #endif
 1254                         default:
 1255                                 /* TSNH */
 1256                                 break;
 1257                         }
 1258                 }
 1259                 SCTP_TCB_UNLOCK(stcb);
 1260                 SCTP_INP_RUNLOCK(inp);
 1261         }
 1262         return (NULL);
 1263 }
 1264 
 1265 
 1266 /*
 1267  * rules for use
 1268  *
 1269  * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an
 1270  * stcb, both will be locked (locked_tcb and stcb) but decrement will be done
 1271  * (if locked == NULL). 3) Decrement happens on return ONLY if locked ==
 1272  * NULL.
 1273  */
 1274 
 1275 struct sctp_tcb *
 1276 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote,
 1277     struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb)
 1278 {
 1279         struct sctpasochead *head;
 1280         struct sctp_inpcb *inp;
 1281         struct sctp_tcb *stcb = NULL;
 1282         struct sctp_nets *net;
 1283         uint16_t rport;
 1284 
 1285         inp = *inp_p;
 1286         switch (remote->sa_family) {
 1287 #ifdef INET
 1288         case AF_INET:
 1289                 rport = (((struct sockaddr_in *)remote)->sin_port);
 1290                 break;
 1291 #endif
 1292 #ifdef INET6
 1293         case AF_INET6:
 1294                 rport = (((struct sockaddr_in6 *)remote)->sin6_port);
 1295                 break;
 1296 #endif
 1297         default:
 1298                 return (NULL);
 1299         }
 1300         if (locked_tcb) {
 1301                 /*
 1302                  * UN-lock so we can do proper locking here this occurs when
 1303                  * called from load_addresses_from_init.
 1304                  */
 1305                 atomic_add_int(&locked_tcb->asoc.refcnt, 1);
 1306                 SCTP_TCB_UNLOCK(locked_tcb);
 1307         }
 1308         SCTP_INP_INFO_RLOCK();
 1309         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
 1310             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
 1311                 /*-
 1312                  * Now either this guy is our listener or it's the
 1313                  * connector. If it is the one that issued the connect, then
 1314                  * it's only chance is to be the first TCB in the list. If
 1315                  * it is the acceptor, then do the special_lookup to hash
 1316                  * and find the real inp.
 1317                  */
 1318                 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) {
 1319                         /* to is peer addr, from is my addr */
 1320                         stcb = sctp_tcb_special_locate(inp_p, remote, local,
 1321                             netp, inp->def_vrf_id);
 1322                         if ((stcb != NULL) && (locked_tcb == NULL)) {
 1323                                 /* we have a locked tcb, lower refcount */
 1324                                 SCTP_INP_DECR_REF(inp);
 1325                         }
 1326                         if ((locked_tcb != NULL) && (locked_tcb != stcb)) {
 1327                                 SCTP_INP_RLOCK(locked_tcb->sctp_ep);
 1328                                 SCTP_TCB_LOCK(locked_tcb);
 1329                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
 1330                                 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep);
 1331                         }
 1332                         SCTP_INP_INFO_RUNLOCK();
 1333                         return (stcb);
 1334                 } else {
 1335                         SCTP_INP_WLOCK(inp);
 1336                         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
 1337                                 goto null_return;
 1338                         }
 1339                         stcb = LIST_FIRST(&inp->sctp_asoc_list);
 1340                         if (stcb == NULL) {
 1341                                 goto null_return;
 1342                         }
 1343                         SCTP_TCB_LOCK(stcb);
 1344 
 1345                         if (stcb->rport != rport) {
 1346                                 /* remote port does not match. */
 1347                                 SCTP_TCB_UNLOCK(stcb);
 1348                                 goto null_return;
 1349                         }
 1350                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
 1351                                 SCTP_TCB_UNLOCK(stcb);
 1352                                 goto null_return;
 1353                         }
 1354                         if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
 1355                                 SCTP_TCB_UNLOCK(stcb);
 1356                                 goto null_return;
 1357                         }
 1358                         /* now look at the list of remote addresses */
 1359                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 1360 #ifdef INVARIANTS
 1361                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
 1362                                         panic("Corrupt net list");
 1363                                 }
 1364 #endif
 1365                                 if (net->ro._l_addr.sa.sa_family !=
 1366                                     remote->sa_family) {
 1367                                         /* not the same family */
 1368                                         continue;
 1369                                 }
 1370                                 switch (remote->sa_family) {
 1371 #ifdef INET
 1372                                 case AF_INET:
 1373                                         {
 1374                                                 struct sockaddr_in *sin,
 1375                                                            *rsin;
 1376 
 1377                                                 sin = (struct sockaddr_in *)
 1378                                                     &net->ro._l_addr;
 1379                                                 rsin = (struct sockaddr_in *)remote;
 1380                                                 if (sin->sin_addr.s_addr ==
 1381                                                     rsin->sin_addr.s_addr) {
 1382                                                         /* found it */
 1383                                                         if (netp != NULL) {
 1384                                                                 *netp = net;
 1385                                                         }
 1386                                                         if (locked_tcb == NULL) {
 1387                                                                 SCTP_INP_DECR_REF(inp);
 1388                                                         } else if (locked_tcb != stcb) {
 1389                                                                 SCTP_TCB_LOCK(locked_tcb);
 1390                                                         }
 1391                                                         if (locked_tcb) {
 1392                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
 1393                                                         }
 1394                                                         SCTP_INP_WUNLOCK(inp);
 1395                                                         SCTP_INP_INFO_RUNLOCK();
 1396                                                         return (stcb);
 1397                                                 }
 1398                                                 break;
 1399                                         }
 1400 #endif
 1401 #ifdef INET6
 1402                                 case AF_INET6:
 1403                                         {
 1404                                                 struct sockaddr_in6 *sin6,
 1405                                                             *rsin6;
 1406 
 1407                                                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
 1408                                                 rsin6 = (struct sockaddr_in6 *)remote;
 1409                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
 1410                                                     rsin6)) {
 1411                                                         /* found it */
 1412                                                         if (netp != NULL) {
 1413                                                                 *netp = net;
 1414                                                         }
 1415                                                         if (locked_tcb == NULL) {
 1416                                                                 SCTP_INP_DECR_REF(inp);
 1417                                                         } else if (locked_tcb != stcb) {
 1418                                                                 SCTP_TCB_LOCK(locked_tcb);
 1419                                                         }
 1420                                                         if (locked_tcb) {
 1421                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
 1422                                                         }
 1423                                                         SCTP_INP_WUNLOCK(inp);
 1424                                                         SCTP_INP_INFO_RUNLOCK();
 1425                                                         return (stcb);
 1426                                                 }
 1427                                                 break;
 1428                                         }
 1429 #endif
 1430                                 default:
 1431                                         /* TSNH */
 1432                                         break;
 1433                                 }
 1434                         }
 1435                         SCTP_TCB_UNLOCK(stcb);
 1436                 }
 1437         } else {
 1438                 SCTP_INP_WLOCK(inp);
 1439                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
 1440                         goto null_return;
 1441                 }
 1442                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport,
 1443                     inp->sctp_hashmark)];
 1444                 LIST_FOREACH(stcb, head, sctp_tcbhash) {
 1445                         if (stcb->rport != rport) {
 1446                                 /* remote port does not match */
 1447                                 continue;
 1448                         }
 1449                         SCTP_TCB_LOCK(stcb);
 1450                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
 1451                                 SCTP_TCB_UNLOCK(stcb);
 1452                                 continue;
 1453                         }
 1454                         if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
 1455                                 SCTP_TCB_UNLOCK(stcb);
 1456                                 continue;
 1457                         }
 1458                         /* now look at the list of remote addresses */
 1459                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 1460 #ifdef INVARIANTS
 1461                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
 1462                                         panic("Corrupt net list");
 1463                                 }
 1464 #endif
 1465                                 if (net->ro._l_addr.sa.sa_family !=
 1466                                     remote->sa_family) {
 1467                                         /* not the same family */
 1468                                         continue;
 1469                                 }
 1470                                 switch (remote->sa_family) {
 1471 #ifdef INET
 1472                                 case AF_INET:
 1473                                         {
 1474                                                 struct sockaddr_in *sin,
 1475                                                            *rsin;
 1476 
 1477                                                 sin = (struct sockaddr_in *)
 1478                                                     &net->ro._l_addr;
 1479                                                 rsin = (struct sockaddr_in *)remote;
 1480                                                 if (sin->sin_addr.s_addr ==
 1481                                                     rsin->sin_addr.s_addr) {
 1482                                                         /* found it */
 1483                                                         if (netp != NULL) {
 1484                                                                 *netp = net;
 1485                                                         }
 1486                                                         if (locked_tcb == NULL) {
 1487                                                                 SCTP_INP_DECR_REF(inp);
 1488                                                         } else if (locked_tcb != stcb) {
 1489                                                                 SCTP_TCB_LOCK(locked_tcb);
 1490                                                         }
 1491                                                         if (locked_tcb) {
 1492                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
 1493                                                         }
 1494                                                         SCTP_INP_WUNLOCK(inp);
 1495                                                         SCTP_INP_INFO_RUNLOCK();
 1496                                                         return (stcb);
 1497                                                 }
 1498                                                 break;
 1499                                         }
 1500 #endif
 1501 #ifdef INET6
 1502                                 case AF_INET6:
 1503                                         {
 1504                                                 struct sockaddr_in6 *sin6,
 1505                                                             *rsin6;
 1506 
 1507                                                 sin6 = (struct sockaddr_in6 *)
 1508                                                     &net->ro._l_addr;
 1509                                                 rsin6 = (struct sockaddr_in6 *)remote;
 1510                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
 1511                                                     rsin6)) {
 1512                                                         /* found it */
 1513                                                         if (netp != NULL) {
 1514                                                                 *netp = net;
 1515                                                         }
 1516                                                         if (locked_tcb == NULL) {
 1517                                                                 SCTP_INP_DECR_REF(inp);
 1518                                                         } else if (locked_tcb != stcb) {
 1519                                                                 SCTP_TCB_LOCK(locked_tcb);
 1520                                                         }
 1521                                                         if (locked_tcb) {
 1522                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
 1523                                                         }
 1524                                                         SCTP_INP_WUNLOCK(inp);
 1525                                                         SCTP_INP_INFO_RUNLOCK();
 1526                                                         return (stcb);
 1527                                                 }
 1528                                                 break;
 1529                                         }
 1530 #endif
 1531                                 default:
 1532                                         /* TSNH */
 1533                                         break;
 1534                                 }
 1535                         }
 1536                         SCTP_TCB_UNLOCK(stcb);
 1537                 }
 1538         }
 1539 null_return:
 1540         /* clean up for returning null */
 1541         if (locked_tcb) {
 1542                 SCTP_TCB_LOCK(locked_tcb);
 1543                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
 1544         }
 1545         SCTP_INP_WUNLOCK(inp);
 1546         SCTP_INP_INFO_RUNLOCK();
 1547         /* not found */
 1548         return (NULL);
 1549 }
 1550 
 1551 
 1552 /*
 1553  * Find an association for a specific endpoint using the association id given
 1554  * out in the COMM_UP notification
 1555  */
 1556 struct sctp_tcb *
 1557 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
 1558 {
 1559         /*
 1560          * Use my the assoc_id to find a endpoint
 1561          */
 1562         struct sctpasochead *head;
 1563         struct sctp_tcb *stcb;
 1564         uint32_t id;
 1565 
 1566         if (inp == NULL) {
 1567                 SCTP_PRINTF("TSNH ep_associd\n");
 1568                 return (NULL);
 1569         }
 1570         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
 1571                 SCTP_PRINTF("TSNH ep_associd0\n");
 1572                 return (NULL);
 1573         }
 1574         id = (uint32_t) asoc_id;
 1575         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
 1576         if (head == NULL) {
 1577                 /* invalid id TSNH */
 1578                 SCTP_PRINTF("TSNH ep_associd1\n");
 1579                 return (NULL);
 1580         }
 1581         LIST_FOREACH(stcb, head, sctp_tcbasocidhash) {
 1582                 if (stcb->asoc.assoc_id == id) {
 1583                         if (inp != stcb->sctp_ep) {
 1584                                 /*
 1585                                  * some other guy has the same id active (id
 1586                                  * collision ??).
 1587                                  */
 1588                                 SCTP_PRINTF("TSNH ep_associd2\n");
 1589                                 continue;
 1590                         }
 1591                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
 1592                                 continue;
 1593                         }
 1594                         if (want_lock) {
 1595                                 SCTP_TCB_LOCK(stcb);
 1596                         }
 1597                         return (stcb);
 1598                 }
 1599         }
 1600         return (NULL);
 1601 }
 1602 
 1603 
 1604 struct sctp_tcb *
 1605 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
 1606 {
 1607         struct sctp_tcb *stcb;
 1608 
 1609         SCTP_INP_RLOCK(inp);
 1610         stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock);
 1611         SCTP_INP_RUNLOCK(inp);
 1612         return (stcb);
 1613 }
 1614 
 1615 
 1616 /*
 1617  * Endpoint probe expects that the INP_INFO is locked.
 1618  */
 1619 static struct sctp_inpcb *
 1620 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head,
 1621     uint16_t lport, uint32_t vrf_id)
 1622 {
 1623         struct sctp_inpcb *inp;
 1624         struct sctp_laddr *laddr;
 1625 
 1626 #ifdef INET
 1627         struct sockaddr_in *sin;
 1628 
 1629 #endif
 1630 #ifdef INET6
 1631         struct sockaddr_in6 *sin6;
 1632         struct sockaddr_in6 *intf_addr6;
 1633 
 1634 #endif
 1635         int fnd;
 1636 
 1637 #ifdef INET
 1638         sin = NULL;
 1639 #endif
 1640 #ifdef INET6
 1641         sin6 = NULL;
 1642 #endif
 1643         switch (nam->sa_family) {
 1644 #ifdef INET
 1645         case AF_INET:
 1646                 sin = (struct sockaddr_in *)nam;
 1647                 break;
 1648 #endif
 1649 #ifdef INET6
 1650         case AF_INET6:
 1651                 sin6 = (struct sockaddr_in6 *)nam;
 1652                 break;
 1653 #endif
 1654         default:
 1655                 /* unsupported family */
 1656                 return (NULL);
 1657         }
 1658 
 1659         if (head == NULL)
 1660                 return (NULL);
 1661 
 1662         LIST_FOREACH(inp, head, sctp_hash) {
 1663                 SCTP_INP_RLOCK(inp);
 1664                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
 1665                         SCTP_INP_RUNLOCK(inp);
 1666                         continue;
 1667                 }
 1668                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) &&
 1669                     (inp->sctp_lport == lport)) {
 1670                         /* got it */
 1671                         switch (nam->sa_family) {
 1672 #ifdef INET
 1673                         case AF_INET:
 1674                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
 1675                                     SCTP_IPV6_V6ONLY(inp)) {
 1676                                         /*
 1677                                          * IPv4 on a IPv6 socket with ONLY
 1678                                          * IPv6 set
 1679                                          */
 1680                                         SCTP_INP_RUNLOCK(inp);
 1681                                         continue;
 1682                                 }
 1683                                 if (prison_check_ip4(inp->ip_inp.inp.inp_cred,
 1684                                     &sin->sin_addr) != 0) {
 1685                                         SCTP_INP_RUNLOCK(inp);
 1686                                         continue;
 1687                                 }
 1688                                 break;
 1689 #endif
 1690 #ifdef INET6
 1691                         case AF_INET6:
 1692                                 /*
 1693                                  * A V6 address and the endpoint is NOT
 1694                                  * bound V6
 1695                                  */
 1696                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
 1697                                         SCTP_INP_RUNLOCK(inp);
 1698                                         continue;
 1699                                 }
 1700                                 if (prison_check_ip6(inp->ip_inp.inp.inp_cred,
 1701                                     &sin6->sin6_addr) != 0) {
 1702                                         SCTP_INP_RUNLOCK(inp);
 1703                                         continue;
 1704                                 }
 1705                                 break;
 1706 #endif
 1707                         default:
 1708                                 break;
 1709                         }
 1710                         /* does a VRF id match? */
 1711                         fnd = 0;
 1712                         if (inp->def_vrf_id == vrf_id)
 1713                                 fnd = 1;
 1714 
 1715                         SCTP_INP_RUNLOCK(inp);
 1716                         if (!fnd)
 1717                                 continue;
 1718                         return (inp);
 1719                 }
 1720                 SCTP_INP_RUNLOCK(inp);
 1721         }
 1722         switch (nam->sa_family) {
 1723 #ifdef INET
 1724         case AF_INET:
 1725                 if (sin->sin_addr.s_addr == INADDR_ANY) {
 1726                         /* Can't hunt for one that has no address specified */
 1727                         return (NULL);
 1728                 }
 1729                 break;
 1730 #endif
 1731 #ifdef INET6
 1732         case AF_INET6:
 1733                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
 1734                         /* Can't hunt for one that has no address specified */
 1735                         return (NULL);
 1736                 }
 1737                 break;
 1738 #endif
 1739         default:
 1740                 break;
 1741         }
 1742         /*
 1743          * ok, not bound to all so see if we can find a EP bound to this
 1744          * address.
 1745          */
 1746         LIST_FOREACH(inp, head, sctp_hash) {
 1747                 SCTP_INP_RLOCK(inp);
 1748                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
 1749                         SCTP_INP_RUNLOCK(inp);
 1750                         continue;
 1751                 }
 1752                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) {
 1753                         SCTP_INP_RUNLOCK(inp);
 1754                         continue;
 1755                 }
 1756                 /*
 1757                  * Ok this could be a likely candidate, look at all of its
 1758                  * addresses
 1759                  */
 1760                 if (inp->sctp_lport != lport) {
 1761                         SCTP_INP_RUNLOCK(inp);
 1762                         continue;
 1763                 }
 1764                 /* does a VRF id match? */
 1765                 fnd = 0;
 1766                 if (inp->def_vrf_id == vrf_id)
 1767                         fnd = 1;
 1768 
 1769                 if (!fnd) {
 1770                         SCTP_INP_RUNLOCK(inp);
 1771                         continue;
 1772                 }
 1773                 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
 1774                         if (laddr->ifa == NULL) {
 1775                                 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
 1776                                     __func__);
 1777                                 continue;
 1778                         }
 1779                         SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ",
 1780                             (void *)laddr->ifa);
 1781                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
 1782                                 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n");
 1783                                 continue;
 1784                         }
 1785                         if (laddr->ifa->address.sa.sa_family == nam->sa_family) {
 1786                                 /* possible, see if it matches */
 1787                                 switch (nam->sa_family) {
 1788 #ifdef INET
 1789                                 case AF_INET:
 1790                                         if (sin->sin_addr.s_addr ==
 1791                                             laddr->ifa->address.sin.sin_addr.s_addr) {
 1792                                                 SCTP_INP_RUNLOCK(inp);
 1793                                                 return (inp);
 1794                                         }
 1795                                         break;
 1796 #endif
 1797 #ifdef INET6
 1798                                 case AF_INET6:
 1799                                         intf_addr6 = &laddr->ifa->address.sin6;
 1800                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
 1801                                             intf_addr6)) {
 1802                                                 SCTP_INP_RUNLOCK(inp);
 1803                                                 return (inp);
 1804                                         }
 1805                                         break;
 1806 #endif
 1807                                 }
 1808                         }
 1809                 }
 1810                 SCTP_INP_RUNLOCK(inp);
 1811         }
 1812         return (NULL);
 1813 }
 1814 
 1815 
 1816 static struct sctp_inpcb *
 1817 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id)
 1818 {
 1819         struct sctppcbhead *head;
 1820         struct sctp_inpcb *t_inp;
 1821         int fnd;
 1822 
 1823         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
 1824             SCTP_BASE_INFO(hashmark))];
 1825         LIST_FOREACH(t_inp, head, sctp_hash) {
 1826                 if (t_inp->sctp_lport != lport) {
 1827                         continue;
 1828                 }
 1829                 /* is it in the VRF in question */
 1830                 fnd = 0;
 1831                 if (t_inp->def_vrf_id == vrf_id)
 1832                         fnd = 1;
 1833                 if (!fnd)
 1834                         continue;
 1835 
 1836                 /* This one is in use. */
 1837                 /* check the v6/v4 binding issue */
 1838                 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
 1839                     SCTP_IPV6_V6ONLY(t_inp)) {
 1840                         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
 1841                                 /* collision in V6 space */
 1842                                 return (t_inp);
 1843                         } else {
 1844                                 /* inp is BOUND_V4 no conflict */
 1845                                 continue;
 1846                         }
 1847                 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
 1848                         /* t_inp is bound v4 and v6, conflict always */
 1849                         return (t_inp);
 1850                 } else {
 1851                         /* t_inp is bound only V4 */
 1852                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
 1853                             SCTP_IPV6_V6ONLY(inp)) {
 1854                                 /* no conflict */
 1855                                 continue;
 1856                         }
 1857                         /* else fall through to conflict */
 1858                 }
 1859                 return (t_inp);
 1860         }
 1861         return (NULL);
 1862 }
 1863 
 1864 
 1865 int
 1866 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp)
 1867 {
 1868         /* For 1-2-1 with port reuse */
 1869         struct sctppcbhead *head;
 1870         struct sctp_inpcb *tinp, *ninp;
 1871 
 1872         if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) {
 1873                 /* only works with port reuse on */
 1874                 return (-1);
 1875         }
 1876         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) {
 1877                 return (0);
 1878         }
 1879         SCTP_INP_RUNLOCK(inp);
 1880         SCTP_INP_INFO_WLOCK();
 1881         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport,
 1882             SCTP_BASE_INFO(hashmark))];
 1883         /* Kick out all non-listeners to the TCP hash */
 1884         LIST_FOREACH_SAFE(tinp, head, sctp_hash, ninp) {
 1885                 if (tinp->sctp_lport != inp->sctp_lport) {
 1886                         continue;
 1887                 }
 1888                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
 1889                         continue;
 1890                 }
 1891                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
 1892                         continue;
 1893                 }
 1894                 if (tinp->sctp_socket->so_qlimit) {
 1895                         continue;
 1896                 }
 1897                 SCTP_INP_WLOCK(tinp);
 1898                 LIST_REMOVE(tinp, sctp_hash);
 1899                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))];
 1900                 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
 1901                 LIST_INSERT_HEAD(head, tinp, sctp_hash);
 1902                 SCTP_INP_WUNLOCK(tinp);
 1903         }
 1904         SCTP_INP_WLOCK(inp);
 1905         /* Pull from where he was */
 1906         LIST_REMOVE(inp, sctp_hash);
 1907         inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL;
 1908         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))];
 1909         LIST_INSERT_HEAD(head, inp, sctp_hash);
 1910         SCTP_INP_WUNLOCK(inp);
 1911         SCTP_INP_RLOCK(inp);
 1912         SCTP_INP_INFO_WUNLOCK();
 1913         return (0);
 1914 }
 1915 
 1916 
 1917 struct sctp_inpcb *
 1918 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock,
 1919     uint32_t vrf_id)
 1920 {
 1921         /*
 1922          * First we check the hash table to see if someone has this port
 1923          * bound with just the port.
 1924          */
 1925         struct sctp_inpcb *inp;
 1926         struct sctppcbhead *head;
 1927         int lport;
 1928         unsigned int i;
 1929 
 1930 #ifdef INET
 1931         struct sockaddr_in *sin;
 1932 
 1933 #endif
 1934 #ifdef INET6
 1935         struct sockaddr_in6 *sin6;
 1936 
 1937 #endif
 1938 
 1939         switch (nam->sa_family) {
 1940 #ifdef INET
 1941         case AF_INET:
 1942                 sin = (struct sockaddr_in *)nam;
 1943                 lport = sin->sin_port;
 1944                 break;
 1945 #endif
 1946 #ifdef INET6
 1947         case AF_INET6:
 1948                 sin6 = (struct sockaddr_in6 *)nam;
 1949                 lport = sin6->sin6_port;
 1950                 break;
 1951 #endif
 1952         default:
 1953                 return (NULL);
 1954         }
 1955         /*
 1956          * I could cheat here and just cast to one of the types but we will
 1957          * do it right. It also provides the check against an Unsupported
 1958          * type too.
 1959          */
 1960         /* Find the head of the ALLADDR chain */
 1961         if (have_lock == 0) {
 1962                 SCTP_INP_INFO_RLOCK();
 1963         }
 1964         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
 1965             SCTP_BASE_INFO(hashmark))];
 1966         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
 1967 
 1968         /*
 1969          * If the TCP model exists it could be that the main listening
 1970          * endpoint is gone but there still exists a connected socket for
 1971          * this guy. If so we can return the first one that we find. This
 1972          * may NOT be the correct one so the caller should be wary on the
 1973          * returned INP. Currently the only caller that sets find_tcp_pool
 1974          * is in bindx where we are verifying that a user CAN bind the
 1975          * address. He either has bound it already, or someone else has, or
 1976          * its open to bind, so this is good enough.
 1977          */
 1978         if (inp == NULL && find_tcp_pool) {
 1979                 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) {
 1980                         head = &SCTP_BASE_INFO(sctp_tcpephash)[i];
 1981                         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
 1982                         if (inp) {
 1983                                 break;
 1984                         }
 1985                 }
 1986         }
 1987         if (inp) {
 1988                 SCTP_INP_INCR_REF(inp);
 1989         }
 1990         if (have_lock == 0) {
 1991                 SCTP_INP_INFO_RUNLOCK();
 1992         }
 1993         return (inp);
 1994 }
 1995 
 1996 
 1997 /*
 1998  * Find an association for an endpoint with the pointer to whom you want to
 1999  * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may
 2000  * need to change the *to to some other struct like a mbuf...
 2001  */
 2002 struct sctp_tcb *
 2003 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to,
 2004     struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool,
 2005     uint32_t vrf_id)
 2006 {
 2007         struct sctp_inpcb *inp = NULL;
 2008         struct sctp_tcb *stcb;
 2009 
 2010         SCTP_INP_INFO_RLOCK();
 2011         if (find_tcp_pool) {
 2012                 if (inp_p != NULL) {
 2013                         stcb = sctp_tcb_special_locate(inp_p, from, to, netp,
 2014                             vrf_id);
 2015                 } else {
 2016                         stcb = sctp_tcb_special_locate(&inp, from, to, netp,
 2017                             vrf_id);
 2018                 }
 2019                 if (stcb != NULL) {
 2020                         SCTP_INP_INFO_RUNLOCK();
 2021                         return (stcb);
 2022                 }
 2023         }
 2024         inp = sctp_pcb_findep(to, 0, 1, vrf_id);
 2025         if (inp_p != NULL) {
 2026                 *inp_p = inp;
 2027         }
 2028         SCTP_INP_INFO_RUNLOCK();
 2029         if (inp == NULL) {
 2030                 return (NULL);
 2031         }
 2032         /*
 2033          * ok, we have an endpoint, now lets find the assoc for it (if any)
 2034          * we now place the source address or from in the to of the find
 2035          * endpoint call. Since in reality this chain is used from the
 2036          * inbound packet side.
 2037          */
 2038         if (inp_p != NULL) {
 2039                 stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to,
 2040                     NULL);
 2041         } else {
 2042                 stcb = sctp_findassociation_ep_addr(&inp, from, netp, to,
 2043                     NULL);
 2044         }
 2045         return (stcb);
 2046 }
 2047 
 2048 
 2049 /*
 2050  * This routine will grub through the mbuf that is a INIT or INIT-ACK and
 2051  * find all addresses that the sender has specified in any address list. Each
 2052  * address will be used to lookup the TCB and see if one exits.
 2053  */
 2054 static struct sctp_tcb *
 2055 sctp_findassociation_special_addr(struct mbuf *m, int offset,
 2056     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp,
 2057     struct sockaddr *dst)
 2058 {
 2059         struct sctp_paramhdr *phdr, parm_buf;
 2060 
 2061 #if defined(INET) || defined(INET6)
 2062         struct sctp_tcb *stcb;
 2063         uint16_t ptype;
 2064 
 2065 #endif
 2066         uint16_t plen;
 2067 
 2068 #ifdef INET
 2069         struct sockaddr_in sin4;
 2070 
 2071 #endif
 2072 #ifdef INET6
 2073         struct sockaddr_in6 sin6;
 2074 
 2075 #endif
 2076 
 2077 #ifdef INET
 2078         memset(&sin4, 0, sizeof(sin4));
 2079         sin4.sin_len = sizeof(sin4);
 2080         sin4.sin_family = AF_INET;
 2081         sin4.sin_port = sh->src_port;
 2082 #endif
 2083 #ifdef INET6
 2084         memset(&sin6, 0, sizeof(sin6));
 2085         sin6.sin6_len = sizeof(sin6);
 2086         sin6.sin6_family = AF_INET6;
 2087         sin6.sin6_port = sh->src_port;
 2088 #endif
 2089 
 2090         offset += sizeof(struct sctp_init_chunk);
 2091 
 2092         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
 2093         while (phdr != NULL) {
 2094                 /* now we must see if we want the parameter */
 2095 #if defined(INET) || defined(INET6)
 2096                 ptype = ntohs(phdr->param_type);
 2097 #endif
 2098                 plen = ntohs(phdr->param_length);
 2099                 if (plen == 0) {
 2100                         break;
 2101                 }
 2102 #ifdef INET
 2103                 if (ptype == SCTP_IPV4_ADDRESS &&
 2104                     plen == sizeof(struct sctp_ipv4addr_param)) {
 2105                         /* Get the rest of the address */
 2106                         struct sctp_ipv4addr_param ip4_parm, *p4;
 2107 
 2108                         phdr = sctp_get_next_param(m, offset,
 2109                             (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm)));
 2110                         if (phdr == NULL) {
 2111                                 return (NULL);
 2112                         }
 2113                         p4 = (struct sctp_ipv4addr_param *)phdr;
 2114                         memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr));
 2115                         /* look it up */
 2116                         stcb = sctp_findassociation_ep_addr(inp_p,
 2117                             (struct sockaddr *)&sin4, netp, dst, NULL);
 2118                         if (stcb != NULL) {
 2119                                 return (stcb);
 2120                         }
 2121                 }
 2122 #endif
 2123 #ifdef INET6
 2124                 if (ptype == SCTP_IPV6_ADDRESS &&
 2125                     plen == sizeof(struct sctp_ipv6addr_param)) {
 2126                         /* Get the rest of the address */
 2127                         struct sctp_ipv6addr_param ip6_parm, *p6;
 2128 
 2129                         phdr = sctp_get_next_param(m, offset,
 2130                             (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm)));
 2131                         if (phdr == NULL) {
 2132                                 return (NULL);
 2133                         }
 2134                         p6 = (struct sctp_ipv6addr_param *)phdr;
 2135                         memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr));
 2136                         /* look it up */
 2137                         stcb = sctp_findassociation_ep_addr(inp_p,
 2138                             (struct sockaddr *)&sin6, netp, dst, NULL);
 2139                         if (stcb != NULL) {
 2140                                 return (stcb);
 2141                         }
 2142                 }
 2143 #endif
 2144                 offset += SCTP_SIZE32(plen);
 2145                 phdr = sctp_get_next_param(m, offset, &parm_buf,
 2146                     sizeof(parm_buf));
 2147         }
 2148         return (NULL);
 2149 }
 2150 
 2151 static struct sctp_tcb *
 2152 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag,
 2153     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport,
 2154     uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag)
 2155 {
 2156         /*
 2157          * Use my vtag to hash. If we find it we then verify the source addr
 2158          * is in the assoc. If all goes well we save a bit on rec of a
 2159          * packet.
 2160          */
 2161         struct sctpasochead *head;
 2162         struct sctp_nets *net;
 2163         struct sctp_tcb *stcb;
 2164 
 2165         SCTP_INP_INFO_RLOCK();
 2166         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag,
 2167             SCTP_BASE_INFO(hashasocmark))];
 2168         LIST_FOREACH(stcb, head, sctp_asocs) {
 2169                 SCTP_INP_RLOCK(stcb->sctp_ep);
 2170                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
 2171                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
 2172                         continue;
 2173                 }
 2174                 if (stcb->sctp_ep->def_vrf_id != vrf_id) {
 2175                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
 2176                         continue;
 2177                 }
 2178                 SCTP_TCB_LOCK(stcb);
 2179                 SCTP_INP_RUNLOCK(stcb->sctp_ep);
 2180                 if (stcb->asoc.my_vtag == vtag) {
 2181                         /* candidate */
 2182                         if (stcb->rport != rport) {
 2183                                 SCTP_TCB_UNLOCK(stcb);
 2184                                 continue;
 2185                         }
 2186                         if (stcb->sctp_ep->sctp_lport != lport) {
 2187                                 SCTP_TCB_UNLOCK(stcb);
 2188                                 continue;
 2189                         }
 2190                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
 2191                                 SCTP_TCB_UNLOCK(stcb);
 2192                                 continue;
 2193                         }
 2194                         /* RRS:Need toaddr check here */
 2195                         if (sctp_does_stcb_own_this_addr(stcb, to) == 0) {
 2196                                 /* Endpoint does not own this address */
 2197                                 SCTP_TCB_UNLOCK(stcb);
 2198                                 continue;
 2199                         }
 2200                         if (remote_tag) {
 2201                                 /*
 2202                                  * If we have both vtags that's all we match
 2203                                  * on
 2204                                  */
 2205                                 if (stcb->asoc.peer_vtag == remote_tag) {
 2206                                         /*
 2207                                          * If both tags match we consider it
 2208                                          * conclusive and check NO
 2209                                          * source/destination addresses
 2210                                          */
 2211                                         goto conclusive;
 2212                                 }
 2213                         }
 2214                         if (skip_src_check) {
 2215                 conclusive:
 2216                                 if (from) {
 2217                                         *netp = sctp_findnet(stcb, from);
 2218                                 } else {
 2219                                         *netp = NULL;   /* unknown */
 2220                                 }
 2221                                 if (inp_p)
 2222                                         *inp_p = stcb->sctp_ep;
 2223                                 SCTP_INP_INFO_RUNLOCK();
 2224                                 return (stcb);
 2225                         }
 2226                         net = sctp_findnet(stcb, from);
 2227                         if (net) {
 2228                                 /* yep its him. */
 2229                                 *netp = net;
 2230                                 SCTP_STAT_INCR(sctps_vtagexpress);
 2231                                 *inp_p = stcb->sctp_ep;
 2232                                 SCTP_INP_INFO_RUNLOCK();
 2233                                 return (stcb);
 2234                         } else {
 2235                                 /*
 2236                                  * not him, this should only happen in rare
 2237                                  * cases so I peg it.
 2238                                  */
 2239                                 SCTP_STAT_INCR(sctps_vtagbogus);
 2240                         }
 2241                 }
 2242                 SCTP_TCB_UNLOCK(stcb);
 2243         }
 2244         SCTP_INP_INFO_RUNLOCK();
 2245         return (NULL);
 2246 }
 2247 
 2248 
 2249 /*
 2250  * Find an association with the pointer to the inbound IP packet. This can be
 2251  * a IPv4 or IPv6 packet.
 2252  */
 2253 struct sctp_tcb *
 2254 sctp_findassociation_addr(struct mbuf *m, int offset,
 2255     struct sockaddr *src, struct sockaddr *dst,
 2256     struct sctphdr *sh, struct sctp_chunkhdr *ch,
 2257     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
 2258 {
 2259         struct sctp_tcb *stcb;
 2260         struct sctp_inpcb *inp;
 2261 
 2262         if (sh->v_tag) {
 2263                 /* we only go down this path if vtag is non-zero */
 2264                 stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag),
 2265                     inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0);
 2266                 if (stcb) {
 2267                         return (stcb);
 2268                 }
 2269         }
 2270         if (inp_p) {
 2271                 stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp,
 2272                     1, vrf_id);
 2273                 inp = *inp_p;
 2274         } else {
 2275                 stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp,
 2276                     1, vrf_id);
 2277         }
 2278         SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp);
 2279         if (stcb == NULL && inp) {
 2280                 /* Found a EP but not this address */
 2281                 if ((ch->chunk_type == SCTP_INITIATION) ||
 2282                     (ch->chunk_type == SCTP_INITIATION_ACK)) {
 2283                         /*-
 2284                          * special hook, we do NOT return linp or an
 2285                          * association that is linked to an existing
 2286                          * association that is under the TCP pool (i.e. no
 2287                          * listener exists). The endpoint finding routine
 2288                          * will always find a listener before examining the
 2289                          * TCP pool.
 2290                          */
 2291                         if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
 2292                                 if (inp_p) {
 2293                                         *inp_p = NULL;
 2294                                 }
 2295                                 return (NULL);
 2296                         }
 2297                         stcb = sctp_findassociation_special_addr(m,
 2298                             offset, sh, &inp, netp, dst);
 2299                         if (inp_p != NULL) {
 2300                                 *inp_p = inp;
 2301                         }
 2302                 }
 2303         }
 2304         SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb);
 2305         return (stcb);
 2306 }
 2307 
 2308 /*
 2309  * lookup an association by an ASCONF lookup address.
 2310  * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup
 2311  */
 2312 struct sctp_tcb *
 2313 sctp_findassociation_ep_asconf(struct mbuf *m, int offset,
 2314     struct sockaddr *dst, struct sctphdr *sh,
 2315     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
 2316 {
 2317         struct sctp_tcb *stcb;
 2318         union sctp_sockstore remote_store;
 2319         struct sctp_paramhdr parm_buf, *phdr;
 2320         int ptype;
 2321         int zero_address = 0;
 2322 
 2323 #ifdef INET
 2324         struct sockaddr_in *sin;
 2325 
 2326 #endif
 2327 #ifdef INET6
 2328         struct sockaddr_in6 *sin6;
 2329 
 2330 #endif
 2331 
 2332         memset(&remote_store, 0, sizeof(remote_store));
 2333         phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk),
 2334             &parm_buf, sizeof(struct sctp_paramhdr));
 2335         if (phdr == NULL) {
 2336                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n",
 2337                     __func__);
 2338                 return NULL;
 2339         }
 2340         ptype = (int)((uint32_t) ntohs(phdr->param_type));
 2341         /* get the correlation address */
 2342         switch (ptype) {
 2343 #ifdef INET6
 2344         case SCTP_IPV6_ADDRESS:
 2345                 {
 2346                         /* ipv6 address param */
 2347                         struct sctp_ipv6addr_param *p6, p6_buf;
 2348 
 2349                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) {
 2350                                 return NULL;
 2351                         }
 2352                         p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m,
 2353                             offset + sizeof(struct sctp_asconf_chunk),
 2354                             &p6_buf.ph, sizeof(*p6));
 2355                         if (p6 == NULL) {
 2356                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n",
 2357                                     __func__);
 2358                                 return (NULL);
 2359                         }
 2360                         sin6 = &remote_store.sin6;
 2361                         sin6->sin6_family = AF_INET6;
 2362                         sin6->sin6_len = sizeof(*sin6);
 2363                         sin6->sin6_port = sh->src_port;
 2364                         memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr));
 2365                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
 2366                                 zero_address = 1;
 2367                         break;
 2368                 }
 2369 #endif
 2370 #ifdef INET
 2371         case SCTP_IPV4_ADDRESS:
 2372                 {
 2373                         /* ipv4 address param */
 2374                         struct sctp_ipv4addr_param *p4, p4_buf;
 2375 
 2376                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) {
 2377                                 return NULL;
 2378                         }
 2379                         p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m,
 2380                             offset + sizeof(struct sctp_asconf_chunk),
 2381                             &p4_buf.ph, sizeof(*p4));
 2382                         if (p4 == NULL) {
 2383                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n",
 2384                                     __func__);
 2385                                 return (NULL);
 2386                         }
 2387                         sin = &remote_store.sin;
 2388                         sin->sin_family = AF_INET;
 2389                         sin->sin_len = sizeof(*sin);
 2390                         sin->sin_port = sh->src_port;
 2391                         memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr));
 2392                         if (sin->sin_addr.s_addr == INADDR_ANY)
 2393                                 zero_address = 1;
 2394                         break;
 2395                 }
 2396 #endif
 2397         default:
 2398                 /* invalid address param type */
 2399                 return NULL;
 2400         }
 2401 
 2402         if (zero_address) {
 2403                 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p,
 2404                     netp, sh->src_port, sh->dest_port, 1, vrf_id, 0);
 2405                 if (stcb != NULL) {
 2406                         SCTP_INP_DECR_REF(*inp_p);
 2407                 }
 2408         } else {
 2409                 stcb = sctp_findassociation_ep_addr(inp_p,
 2410                     &remote_store.sa, netp,
 2411                     dst, NULL);
 2412         }
 2413         return (stcb);
 2414 }
 2415 
 2416 
 2417 /*
 2418  * allocate a sctp_inpcb and setup a temporary binding to a port/all
 2419  * addresses. This way if we don't get a bind we by default pick a ephemeral
 2420  * port with all addresses bound.
 2421  */
 2422 int
 2423 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id)
 2424 {
 2425         /*
 2426          * we get called when a new endpoint starts up. We need to allocate
 2427          * the sctp_inpcb structure from the zone and init it. Mark it as
 2428          * unbound and find a port that we can use as an ephemeral with
 2429          * INADDR_ANY. If the user binds later no problem we can then add in
 2430          * the specific addresses. And setup the default parameters for the
 2431          * EP.
 2432          */
 2433         int i, error;
 2434         struct sctp_inpcb *inp;
 2435         struct sctp_pcb *m;
 2436         struct timeval time;
 2437         sctp_sharedkey_t *null_key;
 2438 
 2439         error = 0;
 2440 
 2441         SCTP_INP_INFO_WLOCK();
 2442         inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb);
 2443         if (inp == NULL) {
 2444                 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n");
 2445                 SCTP_INP_INFO_WUNLOCK();
 2446                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
 2447                 return (ENOBUFS);
 2448         }
 2449         /* zap it */
 2450         bzero(inp, sizeof(*inp));
 2451 
 2452         /* bump generations */
 2453         /* setup socket pointers */
 2454         inp->sctp_socket = so;
 2455         inp->ip_inp.inp.inp_socket = so;
 2456         inp->ip_inp.inp.inp_cred = crhold(so->so_cred);
 2457 #ifdef INET6
 2458         if (INP_SOCKAF(so) == AF_INET6) {
 2459                 if (MODULE_GLOBAL(ip6_auto_flowlabel)) {
 2460                         inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL;
 2461                 }
 2462                 if (MODULE_GLOBAL(ip6_v6only)) {
 2463                         inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY;
 2464                 }
 2465         }
 2466 #endif
 2467         inp->sctp_associd_counter = 1;
 2468         inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT;
 2469         inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT;
 2470         inp->max_cwnd = 0;
 2471         inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off);
 2472         inp->ecn_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_ecn_enable);
 2473         inp->prsctp_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_pr_enable);
 2474         inp->auth_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_auth_enable);
 2475         inp->asconf_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_asconf_enable);
 2476         inp->reconfig_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_reconfig_enable);
 2477         inp->nrsack_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_nrsack_enable);
 2478         inp->pktdrop_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_pktdrop_enable);
 2479         inp->idata_supported = 0;
 2480 
 2481         inp->fibnum = so->so_fibnum;
 2482         /* init the small hash table we use to track asocid <-> tcb */
 2483         inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark);
 2484         if (inp->sctp_asocidhash == NULL) {
 2485                 crfree(inp->ip_inp.inp.inp_cred);
 2486                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
 2487                 SCTP_INP_INFO_WUNLOCK();
 2488                 return (ENOBUFS);
 2489         }
 2490 #ifdef IPSEC
 2491         error = ipsec_init_policy(so, &inp->ip_inp.inp.inp_sp);
 2492         if (error != 0) {
 2493                 crfree(inp->ip_inp.inp.inp_cred);
 2494                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
 2495                 SCTP_INP_INFO_WUNLOCK();
 2496                 return error;
 2497         }
 2498 #endif                          /* IPSEC */
 2499         SCTP_INCR_EP_COUNT();
 2500         inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl);
 2501         SCTP_INP_INFO_WUNLOCK();
 2502 
 2503         so->so_pcb = (caddr_t)inp;
 2504 
 2505         if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) {
 2506                 /* UDP style socket */
 2507                 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
 2508                     SCTP_PCB_FLAGS_UNBOUND);
 2509                 /* Be sure it is NON-BLOCKING IO for UDP */
 2510                 /* SCTP_SET_SO_NBIO(so); */
 2511         } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) {
 2512                 /* TCP style socket */
 2513                 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
 2514                     SCTP_PCB_FLAGS_UNBOUND);
 2515                 /* Be sure we have blocking IO by default */
 2516                 SCTP_CLEAR_SO_NBIO(so);
 2517         } else {
 2518                 /*
 2519                  * unsupported socket type (RAW, etc)- in case we missed it
 2520                  * in protosw
 2521                  */
 2522                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP);
 2523                 so->so_pcb = NULL;
 2524                 crfree(inp->ip_inp.inp.inp_cred);
 2525 #ifdef IPSEC
 2526                 ipsec_delete_pcbpolicy(&inp->ip_inp.inp);
 2527 #endif
 2528                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
 2529                 return (EOPNOTSUPP);
 2530         }
 2531         if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) {
 2532                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
 2533                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
 2534         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) {
 2535                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
 2536                 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
 2537         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) {
 2538                 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
 2539                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
 2540         }
 2541         inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize),
 2542             &inp->sctp_hashmark);
 2543         if (inp->sctp_tcbhash == NULL) {
 2544                 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n");
 2545                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
 2546                 so->so_pcb = NULL;
 2547                 crfree(inp->ip_inp.inp.inp_cred);
 2548 #ifdef IPSEC
 2549                 ipsec_delete_pcbpolicy(&inp->ip_inp.inp);
 2550 #endif
 2551                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
 2552                 return (ENOBUFS);
 2553         }
 2554         inp->def_vrf_id = vrf_id;
 2555 
 2556         SCTP_INP_INFO_WLOCK();
 2557         SCTP_INP_LOCK_INIT(inp);
 2558         INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp");
 2559         SCTP_INP_READ_INIT(inp);
 2560         SCTP_ASOC_CREATE_LOCK_INIT(inp);
 2561         /* lock the new ep */
 2562         SCTP_INP_WLOCK(inp);
 2563 
 2564         /* add it to the info area */
 2565         LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list);
 2566         SCTP_INP_INFO_WUNLOCK();
 2567 
 2568         TAILQ_INIT(&inp->read_queue);
 2569         LIST_INIT(&inp->sctp_addr_list);
 2570 
 2571         LIST_INIT(&inp->sctp_asoc_list);
 2572 
 2573 #ifdef SCTP_TRACK_FREED_ASOCS
 2574         /* TEMP CODE */
 2575         LIST_INIT(&inp->sctp_asoc_free_list);
 2576 #endif
 2577         /* Init the timer structure for signature change */
 2578         SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer);
 2579         inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE;
 2580 
 2581         /* now init the actual endpoint default data */
 2582         m = &inp->sctp_ep;
 2583 
 2584         /* setup the base timeout information */
 2585         m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC);    /* needed ? */
 2586         m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC);    /* needed ? */
 2587         m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default));
 2588         m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default));
 2589         m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default));
 2590         m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default));
 2591         m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default));
 2592         /* all max/min max are in ms */
 2593         m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default);
 2594         m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default);
 2595         m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default);
 2596         m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default);
 2597         m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default);
 2598         m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default);
 2599         m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default);
 2600         m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default);
 2601         m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold);
 2602         m->sctp_sws_sender = SCTP_SWS_SENDER_DEF;
 2603         m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF;
 2604         m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default);
 2605         m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default);
 2606 
 2607         m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module);
 2608         m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module);
 2609         m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default);
 2610         /* number of streams to pre-open on a association */
 2611         m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default);
 2612 
 2613         /* Add adaptation cookie */
 2614         m->adaptation_layer_indicator = 0;
 2615         m->adaptation_layer_indicator_provided = 0;
 2616 
 2617         /* seed random number generator */
 2618         m->random_counter = 1;
 2619         m->store_at = SCTP_SIGNATURE_SIZE;
 2620         SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers));
 2621         sctp_fill_random_store(m);
 2622 
 2623         /* Minimum cookie size */
 2624         m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) +
 2625             sizeof(struct sctp_state_cookie);
 2626         m->size_of_a_cookie += SCTP_SIGNATURE_SIZE;
 2627 
 2628         /* Setup the initial secret */
 2629         (void)SCTP_GETTIME_TIMEVAL(&time);
 2630         m->time_of_secret_change = time.tv_sec;
 2631 
 2632         for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
 2633                 m->secret_key[0][i] = sctp_select_initial_TSN(m);
 2634         }
 2635         sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
 2636 
 2637         /* How long is a cookie good for ? */
 2638         m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default));
 2639         /*
 2640          * Initialize authentication parameters
 2641          */
 2642         m->local_hmacs = sctp_default_supported_hmaclist();
 2643         m->local_auth_chunks = sctp_alloc_chunklist();
 2644         if (inp->asconf_supported) {
 2645                 sctp_auth_add_chunk(SCTP_ASCONF, m->local_auth_chunks);
 2646                 sctp_auth_add_chunk(SCTP_ASCONF_ACK, m->local_auth_chunks);
 2647         }
 2648         m->default_dscp = 0;
 2649 #ifdef INET6
 2650         m->default_flowlabel = 0;
 2651 #endif
 2652         m->port = 0;            /* encapsulation disabled by default */
 2653         LIST_INIT(&m->shared_keys);
 2654         /* add default NULL key as key id 0 */
 2655         null_key = sctp_alloc_sharedkey();
 2656         sctp_insert_sharedkey(&m->shared_keys, null_key);
 2657         SCTP_INP_WUNLOCK(inp);
 2658 #ifdef SCTP_LOG_CLOSING
 2659         sctp_log_closing(inp, NULL, 12);
 2660 #endif
 2661         return (error);
 2662 }
 2663 
 2664 
 2665 void
 2666 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp,
 2667     struct sctp_tcb *stcb)
 2668 {
 2669         struct sctp_nets *net;
 2670         uint16_t lport, rport;
 2671         struct sctppcbhead *head;
 2672         struct sctp_laddr *laddr, *oladdr;
 2673 
 2674         atomic_add_int(&stcb->asoc.refcnt, 1);
 2675         SCTP_TCB_UNLOCK(stcb);
 2676         SCTP_INP_INFO_WLOCK();
 2677         SCTP_INP_WLOCK(old_inp);
 2678         SCTP_INP_WLOCK(new_inp);
 2679         SCTP_TCB_LOCK(stcb);
 2680         atomic_subtract_int(&stcb->asoc.refcnt, 1);
 2681 
 2682         new_inp->sctp_ep.time_of_secret_change =
 2683             old_inp->sctp_ep.time_of_secret_change;
 2684         memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key,
 2685             sizeof(old_inp->sctp_ep.secret_key));
 2686         new_inp->sctp_ep.current_secret_number =
 2687             old_inp->sctp_ep.current_secret_number;
 2688         new_inp->sctp_ep.last_secret_number =
 2689             old_inp->sctp_ep.last_secret_number;
 2690         new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie;
 2691 
 2692         /* make it so new data pours into the new socket */
 2693         stcb->sctp_socket = new_inp->sctp_socket;
 2694         stcb->sctp_ep = new_inp;
 2695 
 2696         /* Copy the port across */
 2697         lport = new_inp->sctp_lport = old_inp->sctp_lport;
 2698         rport = stcb->rport;
 2699         /* Pull the tcb from the old association */
 2700         LIST_REMOVE(stcb, sctp_tcbhash);
 2701         LIST_REMOVE(stcb, sctp_tcblist);
 2702         if (stcb->asoc.in_asocid_hash) {
 2703                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
 2704         }
 2705         /* Now insert the new_inp into the TCP connected hash */
 2706         head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
 2707 
 2708         LIST_INSERT_HEAD(head, new_inp, sctp_hash);
 2709         /* Its safe to access */
 2710         new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
 2711 
 2712         /* Now move the tcb into the endpoint list */
 2713         LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist);
 2714         /*
 2715          * Question, do we even need to worry about the ep-hash since we
 2716          * only have one connection? Probably not :> so lets get rid of it
 2717          * and not suck up any kernel memory in that.
 2718          */
 2719         if (stcb->asoc.in_asocid_hash) {
 2720                 struct sctpasochead *lhd;
 2721 
 2722                 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id,
 2723                     new_inp->hashasocidmark)];
 2724                 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash);
 2725         }
 2726         /* Ok. Let's restart timer. */
 2727         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 2728                 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp,
 2729                     stcb, net);
 2730         }
 2731 
 2732         SCTP_INP_INFO_WUNLOCK();
 2733         if (new_inp->sctp_tcbhash != NULL) {
 2734                 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark);
 2735                 new_inp->sctp_tcbhash = NULL;
 2736         }
 2737         if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
 2738                 /* Subset bound, so copy in the laddr list from the old_inp */
 2739                 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) {
 2740                         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
 2741                         if (laddr == NULL) {
 2742                                 /*
 2743                                  * Gak, what can we do? This assoc is really
 2744                                  * HOSED. We probably should send an abort
 2745                                  * here.
 2746                                  */
 2747                                 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n");
 2748                                 continue;
 2749                         }
 2750                         SCTP_INCR_LADDR_COUNT();
 2751                         bzero(laddr, sizeof(*laddr));
 2752                         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
 2753                         laddr->ifa = oladdr->ifa;
 2754                         atomic_add_int(&laddr->ifa->refcount, 1);
 2755                         LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr,
 2756                             sctp_nxt_addr);
 2757                         new_inp->laddr_count++;
 2758                         if (oladdr == stcb->asoc.last_used_address) {
 2759                                 stcb->asoc.last_used_address = laddr;
 2760                         }
 2761                 }
 2762         }
 2763         /*
 2764          * Now any running timers need to be adjusted since we really don't
 2765          * care if they are running or not just blast in the new_inp into
 2766          * all of them.
 2767          */
 2768 
 2769         stcb->asoc.dack_timer.ep = (void *)new_inp;
 2770         stcb->asoc.asconf_timer.ep = (void *)new_inp;
 2771         stcb->asoc.strreset_timer.ep = (void *)new_inp;
 2772         stcb->asoc.shut_guard_timer.ep = (void *)new_inp;
 2773         stcb->asoc.autoclose_timer.ep = (void *)new_inp;
 2774         stcb->asoc.delayed_event_timer.ep = (void *)new_inp;
 2775         stcb->asoc.delete_prim_timer.ep = (void *)new_inp;
 2776         /* now what about the nets? */
 2777         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 2778                 net->pmtu_timer.ep = (void *)new_inp;
 2779                 net->hb_timer.ep = (void *)new_inp;
 2780                 net->rxt_timer.ep = (void *)new_inp;
 2781         }
 2782         SCTP_INP_WUNLOCK(new_inp);
 2783         SCTP_INP_WUNLOCK(old_inp);
 2784 }
 2785 
 2786 /*
 2787  * insert an laddr entry with the given ifa for the desired list
 2788  */
 2789 static int
 2790 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act)
 2791 {
 2792         struct sctp_laddr *laddr;
 2793 
 2794         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
 2795         if (laddr == NULL) {
 2796                 /* out of memory? */
 2797                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
 2798                 return (EINVAL);
 2799         }
 2800         SCTP_INCR_LADDR_COUNT();
 2801         bzero(laddr, sizeof(*laddr));
 2802         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
 2803         laddr->ifa = ifa;
 2804         laddr->action = act;
 2805         atomic_add_int(&ifa->refcount, 1);
 2806         /* insert it */
 2807         LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
 2808 
 2809         return (0);
 2810 }
 2811 
 2812 /*
 2813  * Remove an laddr entry from the local address list (on an assoc)
 2814  */
 2815 static void
 2816 sctp_remove_laddr(struct sctp_laddr *laddr)
 2817 {
 2818 
 2819         /* remove from the list */
 2820         LIST_REMOVE(laddr, sctp_nxt_addr);
 2821         sctp_free_ifa(laddr->ifa);
 2822         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr);
 2823         SCTP_DECR_LADDR_COUNT();
 2824 }
 2825 
 2826 
 2827 
 2828 /* sctp_ifap is used to bypass normal local address validation checks */
 2829 int
 2830 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr,
 2831     struct sctp_ifa *sctp_ifap, struct thread *p)
 2832 {
 2833         /* bind a ep to a socket address */
 2834         struct sctppcbhead *head;
 2835         struct sctp_inpcb *inp, *inp_tmp;
 2836         struct inpcb *ip_inp;
 2837         int port_reuse_active = 0;
 2838         int bindall;
 2839         uint16_t lport;
 2840         int error;
 2841         uint32_t vrf_id;
 2842 
 2843         lport = 0;
 2844         bindall = 1;
 2845         inp = (struct sctp_inpcb *)so->so_pcb;
 2846         ip_inp = (struct inpcb *)so->so_pcb;
 2847 #ifdef SCTP_DEBUG
 2848         if (addr) {
 2849                 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n",
 2850                     ntohs(((struct sockaddr_in *)addr)->sin_port));
 2851                 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: ");
 2852                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
 2853         }
 2854 #endif
 2855         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
 2856                 /* already did a bind, subsequent binds NOT allowed ! */
 2857                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
 2858                 return (EINVAL);
 2859         }
 2860 #ifdef INVARIANTS
 2861         if (p == NULL)
 2862                 panic("null proc/thread");
 2863 #endif
 2864         if (addr != NULL) {
 2865                 switch (addr->sa_family) {
 2866 #ifdef INET
 2867                 case AF_INET:
 2868                         {
 2869                                 struct sockaddr_in *sin;
 2870 
 2871                                 /* IPV6_V6ONLY socket? */
 2872                                 if (SCTP_IPV6_V6ONLY(ip_inp)) {
 2873                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
 2874                                         return (EINVAL);
 2875                                 }
 2876                                 if (addr->sa_len != sizeof(*sin)) {
 2877                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
 2878                                         return (EINVAL);
 2879                                 }
 2880                                 sin = (struct sockaddr_in *)addr;
 2881                                 lport = sin->sin_port;
 2882                                 /*
 2883                                  * For LOOPBACK the prison_local_ip4() call
 2884                                  * will transmute the ip address to the
 2885                                  * proper value.
 2886                                  */
 2887                                 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) {
 2888                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
 2889                                         return (error);
 2890                                 }
 2891                                 if (sin->sin_addr.s_addr != INADDR_ANY) {
 2892                                         bindall = 0;
 2893                                 }
 2894                                 break;
 2895                         }
 2896 #endif
 2897 #ifdef INET6
 2898                 case AF_INET6:
 2899                         {
 2900                                 /*
 2901                                  * Only for pure IPv6 Address. (No IPv4
 2902                                  * Mapped!)
 2903                                  */
 2904                                 struct sockaddr_in6 *sin6;
 2905 
 2906                                 sin6 = (struct sockaddr_in6 *)addr;
 2907 
 2908                                 if (addr->sa_len != sizeof(*sin6)) {
 2909                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
 2910                                         return (EINVAL);
 2911                                 }
 2912                                 lport = sin6->sin6_port;
 2913                                 /*
 2914                                  * For LOOPBACK the prison_local_ip6() call
 2915                                  * will transmute the ipv6 address to the
 2916                                  * proper value.
 2917                                  */
 2918                                 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr,
 2919                                     (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) {
 2920                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
 2921                                         return (error);
 2922                                 }
 2923                                 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
 2924                                         bindall = 0;
 2925                                         /* KAME hack: embed scopeid */
 2926                                         if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
 2927                                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
 2928                                                 return (EINVAL);
 2929                                         }
 2930                                 }
 2931                                 /* this must be cleared for ifa_ifwithaddr() */
 2932                                 sin6->sin6_scope_id = 0;
 2933                                 break;
 2934                         }
 2935 #endif
 2936                 default:
 2937                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT);
 2938                         return (EAFNOSUPPORT);
 2939                 }
 2940         }
 2941         SCTP_INP_INFO_WLOCK();
 2942         SCTP_INP_WLOCK(inp);
 2943         /* Setup a vrf_id to be the default for the non-bind-all case. */
 2944         vrf_id = inp->def_vrf_id;
 2945 
 2946         /* increase our count due to the unlock we do */
 2947         SCTP_INP_INCR_REF(inp);
 2948         if (lport) {
 2949                 /*
 2950                  * Did the caller specify a port? if so we must see if an ep
 2951                  * already has this one bound.
 2952                  */
 2953                 /* got to be root to get at low ports */
 2954                 if (ntohs(lport) < IPPORT_RESERVED) {
 2955                         if (p && (error =
 2956                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
 2957                             )) {
 2958                                 SCTP_INP_DECR_REF(inp);
 2959                                 SCTP_INP_WUNLOCK(inp);
 2960                                 SCTP_INP_INFO_WUNLOCK();
 2961                                 return (error);
 2962                         }
 2963                 }
 2964                 SCTP_INP_WUNLOCK(inp);
 2965                 if (bindall) {
 2966                         vrf_id = inp->def_vrf_id;
 2967                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
 2968                         if (inp_tmp != NULL) {
 2969                                 /*
 2970                                  * lock guy returned and lower count note
 2971                                  * that we are not bound so inp_tmp should
 2972                                  * NEVER be inp. And it is this inp
 2973                                  * (inp_tmp) that gets the reference bump,
 2974                                  * so we must lower it.
 2975                                  */
 2976                                 SCTP_INP_DECR_REF(inp_tmp);
 2977                                 /* unlock info */
 2978                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
 2979                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
 2980                                         /*
 2981                                          * Ok, must be one-2-one and
 2982                                          * allowing port re-use
 2983                                          */
 2984                                         port_reuse_active = 1;
 2985                                         goto continue_anyway;
 2986                                 }
 2987                                 SCTP_INP_DECR_REF(inp);
 2988                                 SCTP_INP_INFO_WUNLOCK();
 2989                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
 2990                                 return (EADDRINUSE);
 2991                         }
 2992                 } else {
 2993                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
 2994                         if (inp_tmp != NULL) {
 2995                                 /*
 2996                                  * lock guy returned and lower count note
 2997                                  * that we are not bound so inp_tmp should
 2998                                  * NEVER be inp. And it is this inp
 2999                                  * (inp_tmp) that gets the reference bump,
 3000                                  * so we must lower it.
 3001                                  */
 3002                                 SCTP_INP_DECR_REF(inp_tmp);
 3003                                 /* unlock info */
 3004                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
 3005                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
 3006                                         /*
 3007                                          * Ok, must be one-2-one and
 3008                                          * allowing port re-use
 3009                                          */
 3010                                         port_reuse_active = 1;
 3011                                         goto continue_anyway;
 3012                                 }
 3013                                 SCTP_INP_DECR_REF(inp);
 3014                                 SCTP_INP_INFO_WUNLOCK();
 3015                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
 3016                                 return (EADDRINUSE);
 3017                         }
 3018                 }
 3019 continue_anyway:
 3020                 SCTP_INP_WLOCK(inp);
 3021                 if (bindall) {
 3022                         /* verify that no lport is not used by a singleton */
 3023                         if ((port_reuse_active == 0) &&
 3024                             (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) {
 3025                                 /* Sorry someone already has this one bound */
 3026                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
 3027                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
 3028                                         port_reuse_active = 1;
 3029                                 } else {
 3030                                         SCTP_INP_DECR_REF(inp);
 3031                                         SCTP_INP_WUNLOCK(inp);
 3032                                         SCTP_INP_INFO_WUNLOCK();
 3033                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
 3034                                         return (EADDRINUSE);
 3035                                 }
 3036                         }
 3037                 }
 3038         } else {
 3039                 uint16_t first, last, candidate;
 3040                 uint16_t count;
 3041                 int done;
 3042 
 3043                 if (ip_inp->inp_flags & INP_HIGHPORT) {
 3044                         first = MODULE_GLOBAL(ipport_hifirstauto);
 3045                         last = MODULE_GLOBAL(ipport_hilastauto);
 3046                 } else if (ip_inp->inp_flags & INP_LOWPORT) {
 3047                         if (p && (error =
 3048                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
 3049                             )) {
 3050                                 SCTP_INP_DECR_REF(inp);
 3051                                 SCTP_INP_WUNLOCK(inp);
 3052                                 SCTP_INP_INFO_WUNLOCK();
 3053                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
 3054                                 return (error);
 3055                         }
 3056                         first = MODULE_GLOBAL(ipport_lowfirstauto);
 3057                         last = MODULE_GLOBAL(ipport_lowlastauto);
 3058                 } else {
 3059                         first = MODULE_GLOBAL(ipport_firstauto);
 3060                         last = MODULE_GLOBAL(ipport_lastauto);
 3061                 }
 3062                 if (first > last) {
 3063                         uint16_t temp;
 3064 
 3065                         temp = first;
 3066                         first = last;
 3067                         last = temp;
 3068                 }
 3069                 count = last - first + 1;       /* number of candidates */
 3070                 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count);
 3071 
 3072                 done = 0;
 3073                 while (!done) {
 3074                         if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) {
 3075                                 done = 1;
 3076                         }
 3077                         if (!done) {
 3078                                 if (--count == 0) {
 3079                                         SCTP_INP_DECR_REF(inp);
 3080                                         SCTP_INP_WUNLOCK(inp);
 3081                                         SCTP_INP_INFO_WUNLOCK();
 3082                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
 3083                                         return (EADDRINUSE);
 3084                                 }
 3085                                 if (candidate == last)
 3086                                         candidate = first;
 3087                                 else
 3088                                         candidate = candidate + 1;
 3089                         }
 3090                 }
 3091                 lport = htons(candidate);
 3092         }
 3093         SCTP_INP_DECR_REF(inp);
 3094         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
 3095             SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
 3096                 /*
 3097                  * this really should not happen. The guy did a non-blocking
 3098                  * bind and then did a close at the same time.
 3099                  */
 3100                 SCTP_INP_WUNLOCK(inp);
 3101                 SCTP_INP_INFO_WUNLOCK();
 3102                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
 3103                 return (EINVAL);
 3104         }
 3105         /* ok we look clear to give out this port, so lets setup the binding */
 3106         if (bindall) {
 3107                 /* binding to all addresses, so just set in the proper flags */
 3108                 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL;
 3109                 /* set the automatic addr changes from kernel flag */
 3110                 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) {
 3111                         sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF);
 3112                         sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
 3113                 } else {
 3114                         sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
 3115                         sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
 3116                 }
 3117                 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) {
 3118                         sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
 3119                 } else {
 3120                         sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
 3121                 }
 3122                 /*
 3123                  * set the automatic mobility_base from kernel flag (by
 3124                  * micchie)
 3125                  */
 3126                 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) {
 3127                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE);
 3128                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
 3129                 } else {
 3130                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE);
 3131                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
 3132                 }
 3133                 /*
 3134                  * set the automatic mobility_fasthandoff from kernel flag
 3135                  * (by micchie)
 3136                  */
 3137                 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) {
 3138                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF);
 3139                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
 3140                 } else {
 3141                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF);
 3142                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
 3143                 }
 3144         } else {
 3145                 /*
 3146                  * bind specific, make sure flags is off and add a new
 3147                  * address structure to the sctp_addr_list inside the ep
 3148                  * structure.
 3149                  * 
 3150                  * We will need to allocate one and insert it at the head. The
 3151                  * socketopt call can just insert new addresses in there as
 3152                  * well. It will also have to do the embed scope kame hack
 3153                  * too (before adding).
 3154                  */
 3155                 struct sctp_ifa *ifa;
 3156                 union sctp_sockstore store;
 3157 
 3158                 memset(&store, 0, sizeof(store));
 3159                 switch (addr->sa_family) {
 3160 #ifdef INET
 3161                 case AF_INET:
 3162                         memcpy(&store.sin, addr, sizeof(struct sockaddr_in));
 3163                         store.sin.sin_port = 0;
 3164                         break;
 3165 #endif
 3166 #ifdef INET6
 3167                 case AF_INET6:
 3168                         memcpy(&store.sin6, addr, sizeof(struct sockaddr_in6));
 3169                         store.sin6.sin6_port = 0;
 3170                         break;
 3171 #endif
 3172                 default:
 3173                         break;
 3174                 }
 3175                 /*
 3176                  * first find the interface with the bound address need to
 3177                  * zero out the port to find the address! yuck! can't do
 3178                  * this earlier since need port for sctp_pcb_findep()
 3179                  */
 3180                 if (sctp_ifap != NULL) {
 3181                         ifa = sctp_ifap;
 3182                 } else {
 3183                         /*
 3184                          * Note for BSD we hit here always other O/S's will
 3185                          * pass things in via the sctp_ifap argument
 3186                          * (Panda).
 3187                          */
 3188                         ifa = sctp_find_ifa_by_addr(&store.sa,
 3189                             vrf_id, SCTP_ADDR_NOT_LOCKED);
 3190                 }
 3191                 if (ifa == NULL) {
 3192                         /* Can't find an interface with that address */
 3193                         SCTP_INP_WUNLOCK(inp);
 3194                         SCTP_INP_INFO_WUNLOCK();
 3195                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL);
 3196                         return (EADDRNOTAVAIL);
 3197                 }
 3198 #ifdef INET6
 3199                 if (addr->sa_family == AF_INET6) {
 3200                         /* GAK, more FIXME IFA lock? */
 3201                         if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
 3202                                 /* Can't bind a non-existent addr. */
 3203                                 SCTP_INP_WUNLOCK(inp);
 3204                                 SCTP_INP_INFO_WUNLOCK();
 3205                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
 3206                                 return (EINVAL);
 3207                         }
 3208                 }
 3209 #endif
 3210                 /* we're not bound all */
 3211                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
 3212                 /* allow bindx() to send ASCONF's for binding changes */
 3213                 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
 3214                 /* clear automatic addr changes from kernel flag */
 3215                 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
 3216 
 3217                 /* add this address to the endpoint list */
 3218                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0);
 3219                 if (error != 0) {
 3220                         SCTP_INP_WUNLOCK(inp);
 3221                         SCTP_INP_INFO_WUNLOCK();
 3222                         return (error);
 3223                 }
 3224                 inp->laddr_count++;
 3225         }
 3226         /* find the bucket */
 3227         if (port_reuse_active) {
 3228                 /* Put it into tcp 1-2-1 hash */
 3229                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))];
 3230                 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
 3231         } else {
 3232                 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))];
 3233         }
 3234         /* put it in the bucket */
 3235         LIST_INSERT_HEAD(head, inp, sctp_hash);
 3236         SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n",
 3237             (void *)head, ntohs(lport), port_reuse_active);
 3238         /* set in the port */
 3239         inp->sctp_lport = lport;
 3240 
 3241         /* turn off just the unbound flag */
 3242         inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
 3243         SCTP_INP_WUNLOCK(inp);
 3244         SCTP_INP_INFO_WUNLOCK();
 3245         return (0);
 3246 }
 3247 
 3248 
 3249 static void
 3250 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp)
 3251 {
 3252         struct sctp_iterator *it, *nit;
 3253 
 3254         /*
 3255          * We enter with the only the ITERATOR_LOCK in place and a write
 3256          * lock on the inp_info stuff.
 3257          */
 3258         it = sctp_it_ctl.cur_it;
 3259         if (it && (it->vn != curvnet)) {
 3260                 /* Its not looking at our VNET */
 3261                 return;
 3262         }
 3263         if (it && (it->inp == inp)) {
 3264                 /*
 3265                  * This is tricky and we hold the iterator lock, but when it
 3266                  * returns and gets the lock (when we release it) the
 3267                  * iterator will try to operate on inp. We need to stop that
 3268                  * from happening. But of course the iterator has a
 3269                  * reference on the stcb and inp. We can mark it and it will
 3270                  * stop.
 3271                  * 
 3272                  * If its a single iterator situation, we set the end iterator
 3273                  * flag. Otherwise we set the iterator to go to the next
 3274                  * inp.
 3275                  * 
 3276                  */
 3277                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
 3278                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
 3279                 } else {
 3280                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP;
 3281                 }
 3282         }
 3283         /*
 3284          * Now go through and remove any single reference to our inp that
 3285          * may be still pending on the list
 3286          */
 3287         SCTP_IPI_ITERATOR_WQ_LOCK();
 3288         TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
 3289                 if (it->vn != curvnet) {
 3290                         continue;
 3291                 }
 3292                 if (it->inp == inp) {
 3293                         /* This one points to me is it inp specific? */
 3294                         if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
 3295                                 /* Remove and free this one */
 3296                                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead,
 3297                                     it, sctp_nxt_itr);
 3298                                 if (it->function_atend != NULL) {
 3299                                         (*it->function_atend) (it->pointer, it->val);
 3300                                 }
 3301                                 SCTP_FREE(it, SCTP_M_ITER);
 3302                         } else {
 3303                                 it->inp = LIST_NEXT(it->inp, sctp_list);
 3304                                 if (it->inp) {
 3305                                         SCTP_INP_INCR_REF(it->inp);
 3306                                 }
 3307                         }
 3308                         /*
 3309                          * When its put in the refcnt is incremented so decr
 3310                          * it
 3311                          */
 3312                         SCTP_INP_DECR_REF(inp);
 3313                 }
 3314         }
 3315         SCTP_IPI_ITERATOR_WQ_UNLOCK();
 3316 }
 3317 
 3318 /* release sctp_inpcb unbind the port */
 3319 void
 3320 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from)
 3321 {
 3322         /*
 3323          * Here we free a endpoint. We must find it (if it is in the Hash
 3324          * table) and remove it from there. Then we must also find it in the
 3325          * overall list and remove it from there. After all removals are
 3326          * complete then any timer has to be stopped. Then start the actual
 3327          * freeing. a) Any local lists. b) Any associations. c) The hash of
 3328          * all associations. d) finally the ep itself.
 3329          */
 3330         struct sctp_tcb *asoc, *nasoc;
 3331         struct sctp_laddr *laddr, *nladdr;
 3332         struct inpcb *ip_pcb;
 3333         struct socket *so;
 3334         int being_refed = 0;
 3335         struct sctp_queued_to_read *sq, *nsq;
 3336         int cnt;
 3337         sctp_sharedkey_t *shared_key, *nshared_key;
 3338 
 3339 
 3340 #ifdef SCTP_LOG_CLOSING
 3341         sctp_log_closing(inp, NULL, 0);
 3342 #endif
 3343         SCTP_ITERATOR_LOCK();
 3344         /* mark any iterators on the list or being processed */
 3345         sctp_iterator_inp_being_freed(inp);
 3346         SCTP_ITERATOR_UNLOCK();
 3347         so = inp->sctp_socket;
 3348         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
 3349                 /* been here before.. eeks.. get out of here */
 3350                 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate);
 3351 #ifdef SCTP_LOG_CLOSING
 3352                 sctp_log_closing(inp, NULL, 1);
 3353 #endif
 3354                 return;
 3355         }
 3356         SCTP_ASOC_CREATE_LOCK(inp);
 3357         SCTP_INP_INFO_WLOCK();
 3358 
 3359         SCTP_INP_WLOCK(inp);
 3360         if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) {
 3361                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP;
 3362                 /* socket is gone, so no more wakeups allowed */
 3363                 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE;
 3364                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT;
 3365                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT;
 3366 
 3367         }
 3368         /* First time through we have the socket lock, after that no more. */
 3369         sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL,
 3370             SCTP_FROM_SCTP_PCB + SCTP_LOC_1);
 3371 
 3372         if (inp->control) {
 3373                 sctp_m_freem(inp->control);
 3374                 inp->control = NULL;
 3375         }
 3376         if (inp->pkt) {
 3377                 sctp_m_freem(inp->pkt);
 3378                 inp->pkt = NULL;
 3379         }
 3380         ip_pcb = &inp->ip_inp.inp;      /* we could just cast the main pointer
 3381                                          * here but I will be nice :> (i.e.
 3382                                          * ip_pcb = ep;) */
 3383         if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
 3384                 int cnt_in_sd;
 3385 
 3386                 cnt_in_sd = 0;
 3387                 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
 3388                         SCTP_TCB_LOCK(asoc);
 3389                         if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
 3390                                 /* Skip guys being freed */
 3391                                 cnt_in_sd++;
 3392                                 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
 3393                                         /*
 3394                                          * Special case - we did not start a
 3395                                          * kill timer on the asoc due to it
 3396                                          * was not closed. So go ahead and
 3397                                          * start it now.
 3398                                          */
 3399                                         asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
 3400                                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
 3401                                 }
 3402                                 SCTP_TCB_UNLOCK(asoc);
 3403                                 continue;
 3404                         }
 3405                         if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) ||
 3406                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) &&
 3407                             (asoc->asoc.total_output_queue_size == 0)) {
 3408                                 /*
 3409                                  * If we have data in queue, we don't want
 3410                                  * to just free since the app may have done,
 3411                                  * send()/close or connect/send/close. And
 3412                                  * it wants the data to get across first.
 3413                                  */
 3414                                 /* Just abandon things in the front states */
 3415                                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE,
 3416                                     SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) {
 3417                                         cnt_in_sd++;
 3418                                 }
 3419                                 continue;
 3420                         }
 3421                         /* Disconnect the socket please */
 3422                         asoc->sctp_socket = NULL;
 3423                         asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET;
 3424                         if ((asoc->asoc.size_on_reasm_queue > 0) ||
 3425                             (asoc->asoc.control_pdapi) ||
 3426                             (asoc->asoc.size_on_all_streams > 0) ||
 3427                             (so && (so->so_rcv.sb_cc > 0))) {
 3428                                 /* Left with Data unread */
 3429                                 struct mbuf *op_err;
 3430 
 3431                                 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
 3432                                 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3;
 3433                                 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
 3434                                 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
 3435                                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
 3436                                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
 3437                                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
 3438                                 }
 3439                                 if (sctp_free_assoc(inp, asoc,
 3440                                     SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) {
 3441                                         cnt_in_sd++;
 3442                                 }
 3443                                 continue;
 3444                         } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
 3445                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
 3446                             (asoc->asoc.stream_queue_cnt == 0)) {
 3447                                 if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (asoc, &asoc->asoc)) {
 3448                                         goto abort_anyway;
 3449                                 }
 3450                                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
 3451                                     (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
 3452                                         struct sctp_nets *netp;
 3453 
 3454                                         /*
 3455                                          * there is nothing queued to send,
 3456                                          * so I send shutdown
 3457                                          */
 3458                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
 3459                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
 3460                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
 3461                                         }
 3462                                         SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT);
 3463                                         SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING);
 3464                                         sctp_stop_timers_for_shutdown(asoc);
 3465                                         if (asoc->asoc.alternate) {
 3466                                                 netp = asoc->asoc.alternate;
 3467                                         } else {
 3468                                                 netp = asoc->asoc.primary_destination;
 3469                                         }
 3470                                         sctp_send_shutdown(asoc, netp);
 3471                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
 3472                                             netp);
 3473                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
 3474                                             asoc->asoc.primary_destination);
 3475                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED);
 3476                                 }
 3477                         } else {
 3478                                 /* mark into shutdown pending */
 3479                                 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING;
 3480                                 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
 3481                                     asoc->asoc.primary_destination);
 3482                                 if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (asoc, &asoc->asoc)) {
 3483                                         asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT;
 3484                                 }
 3485                                 if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
 3486                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
 3487                                     (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
 3488                                         struct mbuf *op_err;
 3489 
 3490                         abort_anyway:
 3491                                         op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
 3492                                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5;
 3493                                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
 3494                                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
 3495                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
 3496                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
 3497                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
 3498                                         }
 3499                                         if (sctp_free_assoc(inp, asoc,
 3500                                             SCTP_PCBFREE_NOFORCE,
 3501                                             SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) {
 3502                                                 cnt_in_sd++;
 3503                                         }
 3504                                         continue;
 3505                                 } else {
 3506                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED);
 3507                                 }
 3508                         }
 3509                         cnt_in_sd++;
 3510                         SCTP_TCB_UNLOCK(asoc);
 3511                 }
 3512                 /* now is there some left in our SHUTDOWN state? */
 3513                 if (cnt_in_sd) {
 3514 #ifdef SCTP_LOG_CLOSING
 3515                         sctp_log_closing(inp, NULL, 2);
 3516 #endif
 3517                         inp->sctp_socket = NULL;
 3518                         SCTP_INP_WUNLOCK(inp);
 3519                         SCTP_ASOC_CREATE_UNLOCK(inp);
 3520                         SCTP_INP_INFO_WUNLOCK();
 3521                         return;
 3522                 }
 3523         }
 3524         inp->sctp_socket = NULL;
 3525         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
 3526             SCTP_PCB_FLAGS_UNBOUND) {
 3527                 /*
 3528                  * ok, this guy has been bound. It's port is somewhere in
 3529                  * the SCTP_BASE_INFO(hash table). Remove it!
 3530                  */
 3531                 LIST_REMOVE(inp, sctp_hash);
 3532                 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND;
 3533         }
 3534         /*
 3535          * If there is a timer running to kill us, forget it, since it may
 3536          * have a contest on the INP lock.. which would cause us to die ...
 3537          */
 3538         cnt = 0;
 3539         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
 3540                 SCTP_TCB_LOCK(asoc);
 3541                 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
 3542                         if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
 3543                                 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
 3544                                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
 3545                         }
 3546                         cnt++;
 3547                         SCTP_TCB_UNLOCK(asoc);
 3548                         continue;
 3549                 }
 3550                 /* Free associations that are NOT killing us */
 3551                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) &&
 3552                     ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) {
 3553                         struct mbuf *op_err;
 3554 
 3555                         op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
 3556                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7;
 3557                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
 3558                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
 3559                 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
 3560                         cnt++;
 3561                         SCTP_TCB_UNLOCK(asoc);
 3562                         continue;
 3563                 }
 3564                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
 3565                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
 3566                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
 3567                 }
 3568                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE,
 3569                     SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) {
 3570                         cnt++;
 3571                 }
 3572         }
 3573         if (cnt) {
 3574                 /* Ok we have someone out there that will kill us */
 3575                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
 3576 #ifdef SCTP_LOG_CLOSING
 3577                 sctp_log_closing(inp, NULL, 3);
 3578 #endif
 3579                 SCTP_INP_WUNLOCK(inp);
 3580                 SCTP_ASOC_CREATE_UNLOCK(inp);
 3581                 SCTP_INP_INFO_WUNLOCK();
 3582                 return;
 3583         }
 3584         if (SCTP_INP_LOCK_CONTENDED(inp))
 3585                 being_refed++;
 3586         if (SCTP_INP_READ_CONTENDED(inp))
 3587                 being_refed++;
 3588         if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp))
 3589                 being_refed++;
 3590 
 3591         if ((inp->refcount) ||
 3592             (being_refed) ||
 3593             (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) {
 3594                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
 3595 #ifdef SCTP_LOG_CLOSING
 3596                 sctp_log_closing(inp, NULL, 4);
 3597 #endif
 3598                 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
 3599                 SCTP_INP_WUNLOCK(inp);
 3600                 SCTP_ASOC_CREATE_UNLOCK(inp);
 3601                 SCTP_INP_INFO_WUNLOCK();
 3602                 return;
 3603         }
 3604         inp->sctp_ep.signature_change.type = 0;
 3605         inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
 3606         /*
 3607          * Remove it from the list .. last thing we need a lock for.
 3608          */
 3609         LIST_REMOVE(inp, sctp_list);
 3610         SCTP_INP_WUNLOCK(inp);
 3611         SCTP_ASOC_CREATE_UNLOCK(inp);
 3612         SCTP_INP_INFO_WUNLOCK();
 3613         /*
 3614          * Now we release all locks. Since this INP cannot be found anymore
 3615          * except possibly by the kill timer that might be running. We call
 3616          * the drain function here. It should hit the case were it sees the
 3617          * ACTIVE flag cleared and exit out freeing us to proceed and
 3618          * destroy everything.
 3619          */
 3620         if (from != SCTP_CALLED_FROM_INPKILL_TIMER) {
 3621                 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer);
 3622         } else {
 3623                 /* Probably un-needed */
 3624                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
 3625         }
 3626 
 3627 #ifdef SCTP_LOG_CLOSING
 3628         sctp_log_closing(inp, NULL, 5);
 3629 #endif
 3630 
 3631 
 3632         if ((inp->sctp_asocidhash) != NULL) {
 3633                 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark);
 3634                 inp->sctp_asocidhash = NULL;
 3635         }
 3636         /* sa_ignore FREED_MEMORY */
 3637         TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) {
 3638                 /* Its only abandoned if it had data left */
 3639                 if (sq->length)
 3640                         SCTP_STAT_INCR(sctps_left_abandon);
 3641 
 3642                 TAILQ_REMOVE(&inp->read_queue, sq, next);
 3643                 sctp_free_remote_addr(sq->whoFrom);
 3644                 if (so)
 3645                         so->so_rcv.sb_cc -= sq->length;
 3646                 if (sq->data) {
 3647                         sctp_m_freem(sq->data);
 3648                         sq->data = NULL;
 3649                 }
 3650                 /*
 3651                  * no need to free the net count, since at this point all
 3652                  * assoc's are gone.
 3653                  */
 3654                 sctp_free_a_readq(NULL, sq);
 3655         }
 3656         /* Now the sctp_pcb things */
 3657         /*
 3658          * free each asoc if it is not already closed/free. we can't use the
 3659          * macro here since le_next will get freed as part of the
 3660          * sctp_free_assoc() call.
 3661          */
 3662 #ifdef IPSEC
 3663         ipsec_delete_pcbpolicy(ip_pcb);
 3664 #endif
 3665         if (ip_pcb->inp_options) {
 3666                 (void)sctp_m_free(ip_pcb->inp_options);
 3667                 ip_pcb->inp_options = 0;
 3668         }
 3669 #ifdef INET6
 3670         if (ip_pcb->inp_vflag & INP_IPV6) {
 3671                 struct in6pcb *in6p;
 3672 
 3673                 in6p = (struct in6pcb *)inp;
 3674                 ip6_freepcbopts(in6p->in6p_outputopts);
 3675         }
 3676 #endif                          /* INET6 */
 3677         ip_pcb->inp_vflag = 0;
 3678         /* free up authentication fields */
 3679         if (inp->sctp_ep.local_auth_chunks != NULL)
 3680                 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
 3681         if (inp->sctp_ep.local_hmacs != NULL)
 3682                 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
 3683 
 3684         LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) {
 3685                 LIST_REMOVE(shared_key, next);
 3686                 sctp_free_sharedkey(shared_key);
 3687                 /* sa_ignore FREED_MEMORY */
 3688         }
 3689 
 3690         /*
 3691          * if we have an address list the following will free the list of
 3692          * ifaddr's that are set into this ep. Again macro limitations here,
 3693          * since the LIST_FOREACH could be a bad idea.
 3694          */
 3695         LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) {
 3696                 sctp_remove_laddr(laddr);
 3697         }
 3698 
 3699 #ifdef SCTP_TRACK_FREED_ASOCS
 3700         /* TEMP CODE */
 3701         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) {
 3702                 LIST_REMOVE(asoc, sctp_tcblist);
 3703                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc);
 3704                 SCTP_DECR_ASOC_COUNT();
 3705         }
 3706         /* *** END TEMP CODE *** */
 3707 #endif
 3708         /* Now lets see about freeing the EP hash table. */
 3709         if (inp->sctp_tcbhash != NULL) {
 3710                 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
 3711                 inp->sctp_tcbhash = NULL;
 3712         }
 3713         /* Now we must put the ep memory back into the zone pool */
 3714         crfree(inp->ip_inp.inp.inp_cred);
 3715         INP_LOCK_DESTROY(&inp->ip_inp.inp);
 3716         SCTP_INP_LOCK_DESTROY(inp);
 3717         SCTP_INP_READ_DESTROY(inp);
 3718         SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
 3719         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
 3720         SCTP_DECR_EP_COUNT();
 3721 }
 3722 
 3723 
 3724 struct sctp_nets *
 3725 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
 3726 {
 3727         struct sctp_nets *net;
 3728 
 3729         /* locate the address */
 3730         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 3731                 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
 3732                         return (net);
 3733         }
 3734         return (NULL);
 3735 }
 3736 
 3737 
 3738 int
 3739 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id)
 3740 {
 3741         struct sctp_ifa *sctp_ifa;
 3742 
 3743         sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED);
 3744         if (sctp_ifa) {
 3745                 return (1);
 3746         } else {
 3747                 return (0);
 3748         }
 3749 }
 3750 
 3751 /*
 3752  * add's a remote endpoint address, done with the INIT/INIT-ACK as well as
 3753  * when a ASCONF arrives that adds it. It will also initialize all the cwnd
 3754  * stats of stuff.
 3755  */
 3756 int
 3757 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
 3758     struct sctp_nets **netp, uint16_t port, int set_scope, int from)
 3759 {
 3760         /*
 3761          * The following is redundant to the same lines in the
 3762          * sctp_aloc_assoc() but is needed since others call the add address
 3763          * function
 3764          */
 3765         struct sctp_nets *net, *netfirst;
 3766         int addr_inscope;
 3767 
 3768         SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ",
 3769             from);
 3770         SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr);
 3771 
 3772         netfirst = sctp_findnet(stcb, newaddr);
 3773         if (netfirst) {
 3774                 /*
 3775                  * Lie and return ok, we don't want to make the association
 3776                  * go away for this behavior. It will happen in the TCP
 3777                  * model in a connected socket. It does not reach the hash
 3778                  * table until after the association is built so it can't be
 3779                  * found. Mark as reachable, since the initial creation will
 3780                  * have been cleared and the NOT_IN_ASSOC flag will have
 3781                  * been added... and we don't want to end up removing it
 3782                  * back out.
 3783                  */
 3784                 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
 3785                         netfirst->dest_state = (SCTP_ADDR_REACHABLE |
 3786                             SCTP_ADDR_UNCONFIRMED);
 3787                 } else {
 3788                         netfirst->dest_state = SCTP_ADDR_REACHABLE;
 3789                 }
 3790 
 3791                 return (0);
 3792         }
 3793         addr_inscope = 1;
 3794         switch (newaddr->sa_family) {
 3795 #ifdef INET
 3796         case AF_INET:
 3797                 {
 3798                         struct sockaddr_in *sin;
 3799 
 3800                         sin = (struct sockaddr_in *)newaddr;
 3801                         if (sin->sin_addr.s_addr == 0) {
 3802                                 /* Invalid address */
 3803                                 return (-1);
 3804                         }
 3805                         /* zero out the bzero area */
 3806                         memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
 3807 
 3808                         /* assure len is set */
 3809                         sin->sin_len = sizeof(struct sockaddr_in);
 3810                         if (set_scope) {
 3811                                 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
 3812                                         stcb->asoc.scope.ipv4_local_scope = 1;
 3813                                 }
 3814                         } else {
 3815                                 /* Validate the address is in scope */
 3816                                 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
 3817                                     (stcb->asoc.scope.ipv4_local_scope == 0)) {
 3818                                         addr_inscope = 0;
 3819                                 }
 3820                         }
 3821                         break;
 3822                 }
 3823 #endif
 3824 #ifdef INET6
 3825         case AF_INET6:
 3826                 {
 3827                         struct sockaddr_in6 *sin6;
 3828 
 3829                         sin6 = (struct sockaddr_in6 *)newaddr;
 3830                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
 3831                                 /* Invalid address */
 3832                                 return (-1);
 3833                         }
 3834                         /* assure len is set */
 3835                         sin6->sin6_len = sizeof(struct sockaddr_in6);
 3836                         if (set_scope) {
 3837                                 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) {
 3838                                         stcb->asoc.scope.loopback_scope = 1;
 3839                                         stcb->asoc.scope.local_scope = 0;
 3840                                         stcb->asoc.scope.ipv4_local_scope = 1;
 3841                                         stcb->asoc.scope.site_scope = 1;
 3842                                 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
 3843                                         /*
 3844                                          * If the new destination is a
 3845                                          * LINK_LOCAL we must have common
 3846                                          * site scope. Don't set the local
 3847                                          * scope since we may not share all
 3848                                          * links, only loopback can do this.
 3849                                          * Links on the local network would
 3850                                          * also be on our private network
 3851                                          * for v4 too.
 3852                                          */
 3853                                         stcb->asoc.scope.ipv4_local_scope = 1;
 3854                                         stcb->asoc.scope.site_scope = 1;
 3855                                 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
 3856                                         /*
 3857                                          * If the new destination is
 3858                                          * SITE_LOCAL then we must have site
 3859                                          * scope in common.
 3860                                          */
 3861                                         stcb->asoc.scope.site_scope = 1;
 3862                                 }
 3863                         } else {
 3864                                 /* Validate the address is in scope */
 3865                                 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
 3866                                     (stcb->asoc.scope.loopback_scope == 0)) {
 3867                                         addr_inscope = 0;
 3868                                 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
 3869                                     (stcb->asoc.scope.local_scope == 0)) {
 3870                                         addr_inscope = 0;
 3871                                 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
 3872                                     (stcb->asoc.scope.site_scope == 0)) {
 3873                                         addr_inscope = 0;
 3874                                 }
 3875                         }
 3876                         break;
 3877                 }
 3878 #endif
 3879         default:
 3880                 /* not supported family type */
 3881                 return (-1);
 3882         }
 3883         net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets);
 3884         if (net == NULL) {
 3885                 return (-1);
 3886         }
 3887         SCTP_INCR_RADDR_COUNT();
 3888         bzero(net, sizeof(struct sctp_nets));
 3889         (void)SCTP_GETTIME_TIMEVAL(&net->start_time);
 3890         memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
 3891         switch (newaddr->sa_family) {
 3892 #ifdef INET
 3893         case AF_INET:
 3894                 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
 3895                 break;
 3896 #endif
 3897 #ifdef INET6
 3898         case AF_INET6:
 3899                 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
 3900                 break;
 3901 #endif
 3902         default:
 3903                 break;
 3904         }
 3905         net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id);
 3906         if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) {
 3907                 stcb->asoc.scope.loopback_scope = 1;
 3908                 stcb->asoc.scope.ipv4_local_scope = 1;
 3909                 stcb->asoc.scope.local_scope = 0;
 3910                 stcb->asoc.scope.site_scope = 1;
 3911                 addr_inscope = 1;
 3912         }
 3913         net->failure_threshold = stcb->asoc.def_net_failure;
 3914         net->pf_threshold = stcb->asoc.def_net_pf_threshold;
 3915         if (addr_inscope == 0) {
 3916                 net->dest_state = (SCTP_ADDR_REACHABLE |
 3917                     SCTP_ADDR_OUT_OF_SCOPE);
 3918         } else {
 3919                 if (from == SCTP_ADDR_IS_CONFIRMED)
 3920                         /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */
 3921                         net->dest_state = SCTP_ADDR_REACHABLE;
 3922                 else
 3923                         net->dest_state = SCTP_ADDR_REACHABLE |
 3924                             SCTP_ADDR_UNCONFIRMED;
 3925         }
 3926         /*
 3927          * We set this to 0, the timer code knows that this means its an
 3928          * initial value
 3929          */
 3930         net->rto_needed = 1;
 3931         net->RTO = 0;
 3932         net->RTO_measured = 0;
 3933         stcb->asoc.numnets++;
 3934         net->ref_count = 1;
 3935         net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1;
 3936         net->port = port;
 3937         net->dscp = stcb->asoc.default_dscp;
 3938 #ifdef INET6
 3939         net->flowlabel = stcb->asoc.default_flowlabel;
 3940 #endif
 3941         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) {
 3942                 net->dest_state |= SCTP_ADDR_NOHB;
 3943         } else {
 3944                 net->dest_state &= ~SCTP_ADDR_NOHB;
 3945         }
 3946         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) {
 3947                 net->dest_state |= SCTP_ADDR_NO_PMTUD;
 3948         } else {
 3949                 net->dest_state &= ~SCTP_ADDR_NO_PMTUD;
 3950         }
 3951         net->heart_beat_delay = stcb->asoc.heart_beat_delay;
 3952         /* Init the timer structure */
 3953         SCTP_OS_TIMER_INIT(&net->rxt_timer.timer);
 3954         SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer);
 3955         SCTP_OS_TIMER_INIT(&net->hb_timer.timer);
 3956 
 3957         /* Now generate a route for this guy */
 3958 #ifdef INET6
 3959         /* KAME hack: embed scopeid */
 3960         if (newaddr->sa_family == AF_INET6) {
 3961                 struct sockaddr_in6 *sin6;
 3962 
 3963                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
 3964                 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
 3965                 sin6->sin6_scope_id = 0;
 3966         }
 3967 #endif
 3968         SCTP_RTALLOC((sctp_route_t *) & net->ro,
 3969             stcb->asoc.vrf_id,
 3970             stcb->sctp_ep->fibnum);
 3971 
 3972         if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) {
 3973                 /* Get source address */
 3974                 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep,
 3975                     stcb,
 3976                     (sctp_route_t *) & net->ro,
 3977                     net,
 3978                     0,
 3979                     stcb->asoc.vrf_id);
 3980                 if (net->ro._s_addr != NULL) {
 3981                         net->src_addr_selected = 1;
 3982                         /* Now get the interface MTU */
 3983                         if (net->ro._s_addr->ifn_p != NULL) {
 3984                                 net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p);
 3985                         }
 3986                 } else {
 3987                         net->src_addr_selected = 0;
 3988                 }
 3989                 if (net->mtu > 0) {
 3990                         uint32_t rmtu;
 3991 
 3992                         rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt);
 3993                         if (rmtu == 0) {
 3994                                 /*
 3995                                  * Start things off to match mtu of
 3996                                  * interface please.
 3997                                  */
 3998                                 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa,
 3999                                     net->ro.ro_rt, net->mtu);
 4000                         } else {
 4001                                 /*
 4002                                  * we take the route mtu over the interface,
 4003                                  * since the route may be leading out the
 4004                                  * loopback, or a different interface.
 4005                                  */
 4006                                 net->mtu = rmtu;
 4007                         }
 4008                 }
 4009         } else {
 4010                 net->src_addr_selected = 0;
 4011         }
 4012         if (net->mtu == 0) {
 4013                 switch (newaddr->sa_family) {
 4014 #ifdef INET
 4015                 case AF_INET:
 4016                         net->mtu = SCTP_DEFAULT_MTU;
 4017                         break;
 4018 #endif
 4019 #ifdef INET6
 4020                 case AF_INET6:
 4021                         net->mtu = 1280;
 4022                         break;
 4023 #endif
 4024                 default:
 4025                         break;
 4026                 }
 4027         }
 4028 #if defined(INET) || defined(INET6)
 4029         if (net->port) {
 4030                 net->mtu -= (uint32_t) sizeof(struct udphdr);
 4031         }
 4032 #endif
 4033         if (from == SCTP_ALLOC_ASOC) {
 4034                 stcb->asoc.smallest_mtu = net->mtu;
 4035         }
 4036         if (stcb->asoc.smallest_mtu > net->mtu) {
 4037                 sctp_pathmtu_adjustment(stcb, net->mtu);
 4038         }
 4039 #ifdef INET6
 4040         if (newaddr->sa_family == AF_INET6) {
 4041                 struct sockaddr_in6 *sin6;
 4042 
 4043                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
 4044                 (void)sa6_recoverscope(sin6);
 4045         }
 4046 #endif
 4047 
 4048         /* JRS - Use the congestion control given in the CC module */
 4049         if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL)
 4050                 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net);
 4051 
 4052         /*
 4053          * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning
 4054          * of assoc (2005/06/27, iyengar@cis.udel.edu)
 4055          */
 4056         net->find_pseudo_cumack = 1;
 4057         net->find_rtx_pseudo_cumack = 1;
 4058         /* Choose an initial flowid. */
 4059         net->flowid = stcb->asoc.my_vtag ^
 4060             ntohs(stcb->rport) ^
 4061             ntohs(stcb->sctp_ep->sctp_lport);
 4062         net->flowtype = M_HASHTYPE_OPAQUE_HASH;
 4063         if (netp) {
 4064                 *netp = net;
 4065         }
 4066         netfirst = TAILQ_FIRST(&stcb->asoc.nets);
 4067         if (net->ro.ro_rt == NULL) {
 4068                 /* Since we have no route put it at the back */
 4069                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
 4070         } else if (netfirst == NULL) {
 4071                 /* We are the first one in the pool. */
 4072                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
 4073         } else if (netfirst->ro.ro_rt == NULL) {
 4074                 /*
 4075                  * First one has NO route. Place this one ahead of the first
 4076                  * one.
 4077                  */
 4078                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
 4079         } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) {
 4080                 /*
 4081                  * This one has a different interface than the one at the
 4082                  * top of the list. Place it ahead.
 4083                  */
 4084                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
 4085         } else {
 4086                 /*
 4087                  * Ok we have the same interface as the first one. Move
 4088                  * forward until we find either a) one with a NULL route...
 4089                  * insert ahead of that b) one with a different ifp.. insert
 4090                  * after that. c) end of the list.. insert at the tail.
 4091                  */
 4092                 struct sctp_nets *netlook;
 4093 
 4094                 do {
 4095                         netlook = TAILQ_NEXT(netfirst, sctp_next);
 4096                         if (netlook == NULL) {
 4097                                 /* End of the list */
 4098                                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
 4099                                 break;
 4100                         } else if (netlook->ro.ro_rt == NULL) {
 4101                                 /* next one has NO route */
 4102                                 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
 4103                                 break;
 4104                         } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) {
 4105                                 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
 4106                                     net, sctp_next);
 4107                                 break;
 4108                         }
 4109                         /* Shift forward */
 4110                         netfirst = netlook;
 4111                 } while (netlook != NULL);
 4112         }
 4113 
 4114         /* got to have a primary set */
 4115         if (stcb->asoc.primary_destination == 0) {
 4116                 stcb->asoc.primary_destination = net;
 4117         } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) &&
 4118                     (net->ro.ro_rt) &&
 4119             ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
 4120                 /* No route to current primary adopt new primary */
 4121                 stcb->asoc.primary_destination = net;
 4122         }
 4123         /* Validate primary is first */
 4124         net = TAILQ_FIRST(&stcb->asoc.nets);
 4125         if ((net != stcb->asoc.primary_destination) &&
 4126             (stcb->asoc.primary_destination)) {
 4127                 /*
 4128                  * first one on the list is NOT the primary sctp_cmpaddr()
 4129                  * is much more efficient if the primary is the first on the
 4130                  * list, make it so.
 4131                  */
 4132                 TAILQ_REMOVE(&stcb->asoc.nets,
 4133                     stcb->asoc.primary_destination, sctp_next);
 4134                 TAILQ_INSERT_HEAD(&stcb->asoc.nets,
 4135                     stcb->asoc.primary_destination, sctp_next);
 4136         }
 4137         return (0);
 4138 }
 4139 
 4140 
 4141 static uint32_t
 4142 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
 4143 {
 4144         uint32_t id;
 4145         struct sctpasochead *head;
 4146         struct sctp_tcb *lstcb;
 4147 
 4148         SCTP_INP_WLOCK(inp);
 4149 try_again:
 4150         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
 4151                 /* TSNH */
 4152                 SCTP_INP_WUNLOCK(inp);
 4153                 return (0);
 4154         }
 4155         /*
 4156          * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC,
 4157          * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC.
 4158          */
 4159         if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) {
 4160                 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1;
 4161         }
 4162         id = inp->sctp_associd_counter;
 4163         inp->sctp_associd_counter++;
 4164         lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t) id, 0);
 4165         if (lstcb) {
 4166                 goto try_again;
 4167         }
 4168         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
 4169         LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash);
 4170         stcb->asoc.in_asocid_hash = 1;
 4171         SCTP_INP_WUNLOCK(inp);
 4172         return id;
 4173 }
 4174 
 4175 /*
 4176  * allocate an association and add it to the endpoint. The caller must be
 4177  * careful to add all additional addresses once they are know right away or
 4178  * else the assoc will be may experience a blackout scenario.
 4179  */
 4180 struct sctp_tcb *
 4181 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
 4182     int *error, uint32_t override_tag, uint32_t vrf_id,
 4183     uint16_t o_streams, uint16_t port,
 4184     struct thread *p
 4185 )
 4186 {
 4187         /* note the p argument is only valid in unbound sockets */
 4188 
 4189         struct sctp_tcb *stcb;
 4190         struct sctp_association *asoc;
 4191         struct sctpasochead *head;
 4192         uint16_t rport;
 4193         int err;
 4194 
 4195         /*
 4196          * Assumption made here: Caller has done a
 4197          * sctp_findassociation_ep_addr(ep, addr's); to make sure the
 4198          * address does not exist already.
 4199          */
 4200         if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) {
 4201                 /* Hit max assoc, sorry no more */
 4202                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
 4203                 *error = ENOBUFS;
 4204                 return (NULL);
 4205         }
 4206         if (firstaddr == NULL) {
 4207                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
 4208                 *error = EINVAL;
 4209                 return (NULL);
 4210         }
 4211         SCTP_INP_RLOCK(inp);
 4212         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) &&
 4213             ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) ||
 4214             (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) {
 4215                 /*
 4216                  * If its in the TCP pool, its NOT allowed to create an
 4217                  * association. The parent listener needs to call
 4218                  * sctp_aloc_assoc.. or the one-2-many socket. If a peeled
 4219                  * off, or connected one does this.. its an error.
 4220                  */
 4221                 SCTP_INP_RUNLOCK(inp);
 4222                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
 4223                 *error = EINVAL;
 4224                 return (NULL);
 4225         }
 4226         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) ||
 4227             (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) {
 4228                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) ||
 4229                     (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) {
 4230                         SCTP_INP_RUNLOCK(inp);
 4231                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
 4232                         *error = EINVAL;
 4233                         return (NULL);
 4234                 }
 4235         }
 4236         SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:");
 4237 #ifdef SCTP_DEBUG
 4238         if (firstaddr) {
 4239                 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr);
 4240                 switch (firstaddr->sa_family) {
 4241 #ifdef INET
 4242                 case AF_INET:
 4243                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
 4244                             ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
 4245                         break;
 4246 #endif
 4247 #ifdef INET6
 4248                 case AF_INET6:
 4249                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
 4250                             ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port));
 4251                         break;
 4252 #endif
 4253                 default:
 4254                         break;
 4255                 }
 4256         } else {
 4257                 SCTPDBG(SCTP_DEBUG_PCB3, "None\n");
 4258         }
 4259 #endif                          /* SCTP_DEBUG */
 4260         switch (firstaddr->sa_family) {
 4261 #ifdef INET
 4262         case AF_INET:
 4263                 {
 4264                         struct sockaddr_in *sin;
 4265 
 4266                         sin = (struct sockaddr_in *)firstaddr;
 4267                         if ((ntohs(sin->sin_port) == 0) ||
 4268                             (sin->sin_addr.s_addr == INADDR_ANY) ||
 4269                             (sin->sin_addr.s_addr == INADDR_BROADCAST) ||
 4270                             IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
 4271                                 /* Invalid address */
 4272                                 SCTP_INP_RUNLOCK(inp);
 4273                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
 4274                                 *error = EINVAL;
 4275                                 return (NULL);
 4276                         }
 4277                         rport = sin->sin_port;
 4278                         break;
 4279                 }
 4280 #endif
 4281 #ifdef INET6
 4282         case AF_INET6:
 4283                 {
 4284                         struct sockaddr_in6 *sin6;
 4285 
 4286                         sin6 = (struct sockaddr_in6 *)firstaddr;
 4287                         if ((ntohs(sin6->sin6_port) == 0) ||
 4288                             IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
 4289                             IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
 4290                                 /* Invalid address */
 4291                                 SCTP_INP_RUNLOCK(inp);
 4292                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
 4293                                 *error = EINVAL;
 4294                                 return (NULL);
 4295                         }
 4296                         rport = sin6->sin6_port;
 4297                         break;
 4298                 }
 4299 #endif
 4300         default:
 4301                 /* not supported family type */
 4302                 SCTP_INP_RUNLOCK(inp);
 4303                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
 4304                 *error = EINVAL;
 4305                 return (NULL);
 4306         }
 4307         SCTP_INP_RUNLOCK(inp);
 4308         if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
 4309                 /*
 4310                  * If you have not performed a bind, then we need to do the
 4311                  * ephemeral bind for you.
 4312                  */
 4313                 if ((err = sctp_inpcb_bind(inp->sctp_socket,
 4314                     (struct sockaddr *)NULL,
 4315                     (struct sctp_ifa *)NULL,
 4316                     p
 4317                     ))) {
 4318                         /* bind error, probably perm */
 4319                         *error = err;
 4320                         return (NULL);
 4321                 }
 4322         }
 4323         stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb);
 4324         if (stcb == NULL) {
 4325                 /* out of memory? */
 4326                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
 4327                 *error = ENOMEM;
 4328                 return (NULL);
 4329         }
 4330         SCTP_INCR_ASOC_COUNT();
 4331 
 4332         bzero(stcb, sizeof(*stcb));
 4333         asoc = &stcb->asoc;
 4334 
 4335         asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb);
 4336         SCTP_TCB_LOCK_INIT(stcb);
 4337         SCTP_TCB_SEND_LOCK_INIT(stcb);
 4338         stcb->rport = rport;
 4339         /* setup back pointer's */
 4340         stcb->sctp_ep = inp;
 4341         stcb->sctp_socket = inp->sctp_socket;
 4342         if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id, o_streams))) {
 4343                 /* failed */
 4344                 SCTP_TCB_LOCK_DESTROY(stcb);
 4345                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
 4346                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
 4347                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
 4348                 SCTP_DECR_ASOC_COUNT();
 4349                 *error = err;
 4350                 return (NULL);
 4351         }
 4352         /* and the port */
 4353         SCTP_INP_INFO_WLOCK();
 4354         SCTP_INP_WLOCK(inp);
 4355         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
 4356                 /* inpcb freed while alloc going on */
 4357                 SCTP_TCB_LOCK_DESTROY(stcb);
 4358                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
 4359                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
 4360                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
 4361                 SCTP_INP_WUNLOCK(inp);
 4362                 SCTP_INP_INFO_WUNLOCK();
 4363                 SCTP_DECR_ASOC_COUNT();
 4364                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
 4365                 *error = EINVAL;
 4366                 return (NULL);
 4367         }
 4368         SCTP_TCB_LOCK(stcb);
 4369 
 4370         /* now that my_vtag is set, add it to the hash */
 4371         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
 4372         /* put it in the bucket in the vtag hash of assoc's for the system */
 4373         LIST_INSERT_HEAD(head, stcb, sctp_asocs);
 4374         SCTP_INP_INFO_WUNLOCK();
 4375 
 4376         if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, port, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) {
 4377                 /* failure.. memory error? */
 4378                 if (asoc->strmout) {
 4379                         SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
 4380                         asoc->strmout = NULL;
 4381                 }
 4382                 if (asoc->mapping_array) {
 4383                         SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
 4384                         asoc->mapping_array = NULL;
 4385                 }
 4386                 if (asoc->nr_mapping_array) {
 4387                         SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
 4388                         asoc->nr_mapping_array = NULL;
 4389                 }
 4390                 SCTP_DECR_ASOC_COUNT();
 4391                 SCTP_TCB_UNLOCK(stcb);
 4392                 SCTP_TCB_LOCK_DESTROY(stcb);
 4393                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
 4394                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
 4395                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
 4396                 SCTP_INP_WUNLOCK(inp);
 4397                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
 4398                 *error = ENOBUFS;
 4399                 return (NULL);
 4400         }
 4401         /* Init all the timers */
 4402         SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer);
 4403         SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer);
 4404         SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer);
 4405         SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer);
 4406         SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer);
 4407         SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer);
 4408         SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer);
 4409 
 4410         LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
 4411         /* now file the port under the hash as well */
 4412         if (inp->sctp_tcbhash != NULL) {
 4413                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
 4414                     inp->sctp_hashmark)];
 4415                 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
 4416         }
 4417         SCTP_INP_WUNLOCK(inp);
 4418         SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb);
 4419         return (stcb);
 4420 }
 4421 
 4422 
 4423 void
 4424 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net)
 4425 {
 4426         struct sctp_association *asoc;
 4427 
 4428         asoc = &stcb->asoc;
 4429         asoc->numnets--;
 4430         TAILQ_REMOVE(&asoc->nets, net, sctp_next);
 4431         if (net == asoc->primary_destination) {
 4432                 /* Reset primary */
 4433                 struct sctp_nets *lnet;
 4434 
 4435                 lnet = TAILQ_FIRST(&asoc->nets);
 4436                 /*
 4437                  * Mobility adaptation Ideally, if deleted destination is
 4438                  * the primary, it becomes a fast retransmission trigger by
 4439                  * the subsequent SET PRIMARY. (by micchie)
 4440                  */
 4441                 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
 4442                     SCTP_MOBILITY_BASE) ||
 4443                     sctp_is_mobility_feature_on(stcb->sctp_ep,
 4444                     SCTP_MOBILITY_FASTHANDOFF)) {
 4445                         SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n");
 4446                         if (asoc->deleted_primary != NULL) {
 4447                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n");
 4448                                 goto out;
 4449                         }
 4450                         asoc->deleted_primary = net;
 4451                         atomic_add_int(&net->ref_count, 1);
 4452                         memset(&net->lastsa, 0, sizeof(net->lastsa));
 4453                         memset(&net->lastsv, 0, sizeof(net->lastsv));
 4454                         sctp_mobility_feature_on(stcb->sctp_ep,
 4455                             SCTP_MOBILITY_PRIM_DELETED);
 4456                         sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED,
 4457                             stcb->sctp_ep, stcb, NULL);
 4458                 }
 4459 out:
 4460                 /* Try to find a confirmed primary */
 4461                 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0);
 4462         }
 4463         if (net == asoc->last_data_chunk_from) {
 4464                 /* Reset primary */
 4465                 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets);
 4466         }
 4467         if (net == asoc->last_control_chunk_from) {
 4468                 /* Clear net */
 4469                 asoc->last_control_chunk_from = NULL;
 4470         }
 4471         if (net == stcb->asoc.alternate) {
 4472                 sctp_free_remote_addr(stcb->asoc.alternate);
 4473                 stcb->asoc.alternate = NULL;
 4474         }
 4475         sctp_free_remote_addr(net);
 4476 }
 4477 
 4478 /*
 4479  * remove a remote endpoint address from an association, it will fail if the
 4480  * address does not exist.
 4481  */
 4482 int
 4483 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
 4484 {
 4485         /*
 4486          * Here we need to remove a remote address. This is quite simple, we
 4487          * first find it in the list of address for the association
 4488          * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE
 4489          * on that item. Note we do not allow it to be removed if there are
 4490          * no other addresses.
 4491          */
 4492         struct sctp_association *asoc;
 4493         struct sctp_nets *net, *nnet;
 4494 
 4495         asoc = &stcb->asoc;
 4496 
 4497         /* locate the address */
 4498         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
 4499                 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
 4500                         continue;
 4501                 }
 4502                 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
 4503                     remaddr)) {
 4504                         /* we found the guy */
 4505                         if (asoc->numnets < 2) {
 4506                                 /* Must have at LEAST two remote addresses */
 4507                                 return (-1);
 4508                         } else {
 4509                                 sctp_remove_net(stcb, net);
 4510                                 return (0);
 4511                         }
 4512                 }
 4513         }
 4514         /* not found. */
 4515         return (-2);
 4516 }
 4517 
 4518 void
 4519 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
 4520 {
 4521         struct sctpvtaghead *chain;
 4522         struct sctp_tagblock *twait_block;
 4523         int found = 0;
 4524         int i;
 4525 
 4526         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
 4527         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
 4528                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
 4529                         if ((twait_block->vtag_block[i].v_tag == tag) &&
 4530                             (twait_block->vtag_block[i].lport == lport) &&
 4531                             (twait_block->vtag_block[i].rport == rport)) {
 4532                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
 4533                                 twait_block->vtag_block[i].v_tag = 0;
 4534                                 twait_block->vtag_block[i].lport = 0;
 4535                                 twait_block->vtag_block[i].rport = 0;
 4536                                 found = 1;
 4537                                 break;
 4538                         }
 4539                 }
 4540                 if (found)
 4541                         break;
 4542         }
 4543 }
 4544 
 4545 int
 4546 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
 4547 {
 4548         struct sctpvtaghead *chain;
 4549         struct sctp_tagblock *twait_block;
 4550         int found = 0;
 4551         int i;
 4552 
 4553         SCTP_INP_INFO_WLOCK();
 4554         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
 4555         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
 4556                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
 4557                         if ((twait_block->vtag_block[i].v_tag == tag) &&
 4558                             (twait_block->vtag_block[i].lport == lport) &&
 4559                             (twait_block->vtag_block[i].rport == rport)) {
 4560                                 found = 1;
 4561                                 break;
 4562                         }
 4563                 }
 4564                 if (found)
 4565                         break;
 4566         }
 4567         SCTP_INP_INFO_WUNLOCK();
 4568         return (found);
 4569 }
 4570 
 4571 
 4572 void
 4573 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport)
 4574 {
 4575         struct sctpvtaghead *chain;
 4576         struct sctp_tagblock *twait_block;
 4577         struct timeval now;
 4578         int set, i;
 4579 
 4580         if (time == 0) {
 4581                 /* Its disabled */
 4582                 return;
 4583         }
 4584         (void)SCTP_GETTIME_TIMEVAL(&now);
 4585         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
 4586         set = 0;
 4587         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
 4588                 /* Block(s) present, lets find space, and expire on the fly */
 4589                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
 4590                         if ((twait_block->vtag_block[i].v_tag == 0) &&
 4591                             !set) {
 4592                                 twait_block->vtag_block[i].tv_sec_at_expire =
 4593                                     now.tv_sec + time;
 4594                                 twait_block->vtag_block[i].v_tag = tag;
 4595                                 twait_block->vtag_block[i].lport = lport;
 4596                                 twait_block->vtag_block[i].rport = rport;
 4597                                 set = 1;
 4598                         } else if ((twait_block->vtag_block[i].v_tag) &&
 4599                             ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) {
 4600                                 /* Audit expires this guy */
 4601                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
 4602                                 twait_block->vtag_block[i].v_tag = 0;
 4603                                 twait_block->vtag_block[i].lport = 0;
 4604                                 twait_block->vtag_block[i].rport = 0;
 4605                                 if (set == 0) {
 4606                                         /* Reuse it for my new tag */
 4607                                         twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time;
 4608                                         twait_block->vtag_block[i].v_tag = tag;
 4609                                         twait_block->vtag_block[i].lport = lport;
 4610                                         twait_block->vtag_block[i].rport = rport;
 4611                                         set = 1;
 4612                                 }
 4613                         }
 4614                 }
 4615                 if (set) {
 4616                         /*
 4617                          * We only do up to the block where we can place our
 4618                          * tag for audits
 4619                          */
 4620                         break;
 4621                 }
 4622         }
 4623         /* Need to add a new block to chain */
 4624         if (!set) {
 4625                 SCTP_MALLOC(twait_block, struct sctp_tagblock *,
 4626                     sizeof(struct sctp_tagblock), SCTP_M_TIMW);
 4627                 if (twait_block == NULL) {
 4628 #ifdef INVARIANTS
 4629                         panic("Can not alloc tagblock");
 4630 #endif
 4631                         return;
 4632                 }
 4633                 memset(twait_block, 0, sizeof(struct sctp_tagblock));
 4634                 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
 4635                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time;
 4636                 twait_block->vtag_block[0].v_tag = tag;
 4637                 twait_block->vtag_block[0].lport = lport;
 4638                 twait_block->vtag_block[0].rport = rport;
 4639         }
 4640 }
 4641 
 4642 void
 4643 sctp_clean_up_stream(struct sctp_tcb *stcb, struct sctp_readhead *rh)
 4644 {
 4645         struct sctp_tmit_chunk *chk, *nchk;
 4646         struct sctp_queued_to_read *ctl, *nctl;
 4647 
 4648         TAILQ_FOREACH_SAFE(ctl, rh, next_instrm, nctl) {
 4649                 TAILQ_REMOVE(rh, ctl, next_instrm);
 4650                 ctl->on_strm_q = 0;
 4651                 if (ctl->on_read_q == 0) {
 4652                         sctp_free_remote_addr(ctl->whoFrom);
 4653                         if (ctl->data) {
 4654                                 sctp_m_freem(ctl->data);
 4655                                 ctl->data = NULL;
 4656                         }
 4657                 }
 4658                 /* Reassembly free? */
 4659                 TAILQ_FOREACH_SAFE(chk, &ctl->reasm, sctp_next, nchk) {
 4660                         TAILQ_REMOVE(&ctl->reasm, chk, sctp_next);
 4661                         if (chk->data) {
 4662                                 sctp_m_freem(chk->data);
 4663                                 chk->data = NULL;
 4664                         }
 4665                         if (chk->holds_key_ref)
 4666                                 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
 4667                         sctp_free_remote_addr(chk->whoTo);
 4668                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
 4669                         SCTP_DECR_CHK_COUNT();
 4670                         /* sa_ignore FREED_MEMORY */
 4671                 }
 4672                 /*
 4673                  * We don't free the address here since all the net's were
 4674                  * freed above.
 4675                  */
 4676                 if (ctl->on_read_q == 0) {
 4677                         sctp_free_a_readq(stcb, ctl);
 4678                 }
 4679         }
 4680 }
 4681 
 4682 
 4683 /*-
 4684  * Free the association after un-hashing the remote port. This
 4685  * function ALWAYS returns holding NO LOCK on the stcb. It DOES
 4686  * expect that the input to this function IS a locked TCB.
 4687  * It will return 0, if it did NOT destroy the association (instead
 4688  * it unlocks it. It will return NON-zero if it either destroyed the
 4689  * association OR the association is already destroyed.
 4690  */
 4691 int
 4692 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location)
 4693 {
 4694         int i;
 4695         struct sctp_association *asoc;
 4696         struct sctp_nets *net, *nnet;
 4697         struct sctp_laddr *laddr, *naddr;
 4698         struct sctp_tmit_chunk *chk, *nchk;
 4699         struct sctp_asconf_addr *aparam, *naparam;
 4700         struct sctp_asconf_ack *aack, *naack;
 4701         struct sctp_stream_reset_list *strrst, *nstrrst;
 4702         struct sctp_queued_to_read *sq, *nsq;
 4703         struct sctp_stream_queue_pending *sp, *nsp;
 4704         sctp_sharedkey_t *shared_key, *nshared_key;
 4705         struct socket *so;
 4706 
 4707         /* first, lets purge the entry from the hash table. */
 4708 
 4709 #ifdef SCTP_LOG_CLOSING
 4710         sctp_log_closing(inp, stcb, 6);
 4711 #endif
 4712         if (stcb->asoc.state == 0) {
 4713 #ifdef SCTP_LOG_CLOSING
 4714                 sctp_log_closing(inp, NULL, 7);
 4715 #endif
 4716                 /* there is no asoc, really TSNH :-0 */
 4717                 return (1);
 4718         }
 4719         if (stcb->asoc.alternate) {
 4720                 sctp_free_remote_addr(stcb->asoc.alternate);
 4721                 stcb->asoc.alternate = NULL;
 4722         }
 4723         /* TEMP CODE */
 4724         if (stcb->freed_from_where == 0) {
 4725                 /* Only record the first place free happened from */
 4726                 stcb->freed_from_where = from_location;
 4727         }
 4728         /* TEMP CODE */
 4729 
 4730         asoc = &stcb->asoc;
 4731         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
 4732             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
 4733                 /* nothing around */
 4734                 so = NULL;
 4735         else
 4736                 so = inp->sctp_socket;
 4737 
 4738         /*
 4739          * We used timer based freeing if a reader or writer is in the way.
 4740          * So we first check if we are actually being called from a timer,
 4741          * if so we abort early if a reader or writer is still in the way.
 4742          */
 4743         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
 4744             (from_inpcbfree == SCTP_NORMAL_PROC)) {
 4745                 /*
 4746                  * is it the timer driving us? if so are the reader/writers
 4747                  * gone?
 4748                  */
 4749                 if (stcb->asoc.refcnt) {
 4750                         /* nope, reader or writer in the way */
 4751                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
 4752                         /* no asoc destroyed */
 4753                         SCTP_TCB_UNLOCK(stcb);
 4754 #ifdef SCTP_LOG_CLOSING
 4755                         sctp_log_closing(inp, stcb, 8);
 4756 #endif
 4757                         return (0);
 4758                 }
 4759         }
 4760         /* now clean up any other timers */
 4761         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
 4762         asoc->dack_timer.self = NULL;
 4763         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
 4764         /*-
 4765          * For stream reset we don't blast this unless
 4766          * it is a str-reset timer, it might be the
 4767          * free-asoc timer which we DON'T want to
 4768          * disturb.
 4769          */
 4770         if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET)
 4771                 asoc->strreset_timer.self = NULL;
 4772         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
 4773         asoc->asconf_timer.self = NULL;
 4774         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
 4775         asoc->autoclose_timer.self = NULL;
 4776         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
 4777         asoc->shut_guard_timer.self = NULL;
 4778         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
 4779         asoc->delayed_event_timer.self = NULL;
 4780         /* Mobility adaptation */
 4781         (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer);
 4782         asoc->delete_prim_timer.self = NULL;
 4783         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
 4784                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
 4785                 net->rxt_timer.self = NULL;
 4786                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
 4787                 net->pmtu_timer.self = NULL;
 4788                 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer);
 4789                 net->hb_timer.self = NULL;
 4790         }
 4791         /* Now the read queue needs to be cleaned up (only once) */
 4792         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) {
 4793                 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED;
 4794                 SCTP_INP_READ_LOCK(inp);
 4795                 TAILQ_FOREACH(sq, &inp->read_queue, next) {
 4796                         if (sq->stcb == stcb) {
 4797                                 sq->do_not_ref_stcb = 1;
 4798                                 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
 4799                                 /*
 4800                                  * If there is no end, there never will be
 4801                                  * now.
 4802                                  */
 4803                                 if (sq->end_added == 0) {
 4804                                         /* Held for PD-API clear that. */
 4805                                         sq->pdapi_aborted = 1;
 4806                                         sq->held_length = 0;
 4807                                         if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) {
 4808                                                 /*
 4809                                                  * Need to add a PD-API
 4810                                                  * aborted indication.
 4811                                                  * Setting the control_pdapi
 4812                                                  * assures that it will be
 4813                                                  * added right after this
 4814                                                  * msg.
 4815                                                  */
 4816                                                 uint32_t strseq;
 4817 
 4818                                                 stcb->asoc.control_pdapi = sq;
 4819                                                 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn;
 4820                                                 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION,
 4821                                                     stcb,
 4822                                                     SCTP_PARTIAL_DELIVERY_ABORTED,
 4823                                                     (void *)&strseq,
 4824                                                     SCTP_SO_LOCKED);
 4825                                                 stcb->asoc.control_pdapi = NULL;
 4826                                         }
 4827                                 }
 4828                                 /* Add an end to wake them */
 4829                                 sq->end_added = 1;
 4830                         }
 4831                 }
 4832                 SCTP_INP_READ_UNLOCK(inp);
 4833                 if (stcb->block_entry) {
 4834                         SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET);
 4835                         stcb->block_entry->error = ECONNRESET;
 4836                         stcb->block_entry = NULL;
 4837                 }
 4838         }
 4839         if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) {
 4840                 /*
 4841                  * Someone holds a reference OR the socket is unaccepted
 4842                  * yet.
 4843                  */
 4844                 if ((stcb->asoc.refcnt) ||
 4845                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
 4846                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) {
 4847                         stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
 4848                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
 4849                 }
 4850                 SCTP_TCB_UNLOCK(stcb);
 4851                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
 4852                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
 4853                         /* nothing around */
 4854                         so = NULL;
 4855                 if (so) {
 4856                         /* Wake any reader/writers */
 4857                         sctp_sorwakeup(inp, so);
 4858                         sctp_sowwakeup(inp, so);
 4859                 }
 4860 #ifdef SCTP_LOG_CLOSING
 4861                 sctp_log_closing(inp, stcb, 9);
 4862 #endif
 4863                 /* no asoc destroyed */
 4864                 return (0);
 4865         }
 4866 #ifdef SCTP_LOG_CLOSING
 4867         sctp_log_closing(inp, stcb, 10);
 4868 #endif
 4869         /*
 4870          * When I reach here, no others want to kill the assoc yet.. and I
 4871          * own the lock. Now its possible an abort comes in when I do the
 4872          * lock exchange below to grab all the locks to do the final take
 4873          * out. to prevent this we increment the count, which will start a
 4874          * timer and blow out above thus assuring us that we hold exclusive
 4875          * killing of the asoc. Note that after getting back the TCB lock we
 4876          * will go ahead and increment the counter back up and stop any
 4877          * timer a passing stranger may have started :-S
 4878          */
 4879         if (from_inpcbfree == SCTP_NORMAL_PROC) {
 4880                 atomic_add_int(&stcb->asoc.refcnt, 1);
 4881 
 4882                 SCTP_TCB_UNLOCK(stcb);
 4883                 SCTP_INP_INFO_WLOCK();
 4884                 SCTP_INP_WLOCK(inp);
 4885                 SCTP_TCB_LOCK(stcb);
 4886         }
 4887         /* Double check the GONE flag */
 4888         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
 4889             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
 4890                 /* nothing around */
 4891                 so = NULL;
 4892 
 4893         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
 4894             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
 4895                 /*
 4896                  * For TCP type we need special handling when we are
 4897                  * connected. We also include the peel'ed off ones to.
 4898                  */
 4899                 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
 4900                         inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
 4901                         inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED;
 4902                         if (so) {
 4903                                 SOCK_LOCK(so);
 4904                                 if (so->so_rcv.sb_cc == 0) {
 4905                                         so->so_state &= ~(SS_ISCONNECTING |
 4906                                             SS_ISDISCONNECTING |
 4907                                             SS_ISCONFIRMING |
 4908                                             SS_ISCONNECTED);
 4909                                 }
 4910                                 socantrcvmore_locked(so);
 4911                                 sctp_sowwakeup(inp, so);
 4912                                 sctp_sorwakeup(inp, so);
 4913                                 SCTP_SOWAKEUP(so);
 4914                         }
 4915                 }
 4916         }
 4917         /*
 4918          * Make it invalid too, that way if its about to run it will abort
 4919          * and return.
 4920          */
 4921         /* re-increment the lock */
 4922         if (from_inpcbfree == SCTP_NORMAL_PROC) {
 4923                 atomic_add_int(&stcb->asoc.refcnt, -1);
 4924         }
 4925         if (stcb->asoc.refcnt) {
 4926                 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
 4927                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
 4928                 if (from_inpcbfree == SCTP_NORMAL_PROC) {
 4929                         SCTP_INP_INFO_WUNLOCK();
 4930                         SCTP_INP_WUNLOCK(inp);
 4931                 }
 4932                 SCTP_TCB_UNLOCK(stcb);
 4933                 return (0);
 4934         }
 4935         asoc->state = 0;
 4936         if (inp->sctp_tcbhash) {
 4937                 LIST_REMOVE(stcb, sctp_tcbhash);
 4938         }
 4939         if (stcb->asoc.in_asocid_hash) {
 4940                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
 4941         }
 4942         /* Now lets remove it from the list of ALL associations in the EP */
 4943         LIST_REMOVE(stcb, sctp_tcblist);
 4944         if (from_inpcbfree == SCTP_NORMAL_PROC) {
 4945                 SCTP_INP_INCR_REF(inp);
 4946                 SCTP_INP_WUNLOCK(inp);
 4947         }
 4948         /* pull from vtag hash */
 4949         LIST_REMOVE(stcb, sctp_asocs);
 4950         sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait),
 4951             inp->sctp_lport, stcb->rport);
 4952 
 4953         /*
 4954          * Now restop the timers to be sure this is paranoia at is finest!
 4955          */
 4956         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
 4957         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
 4958         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
 4959         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
 4960         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
 4961         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
 4962         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
 4963         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
 4964                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
 4965                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
 4966                 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer);
 4967         }
 4968 
 4969         asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE;
 4970         /*
 4971          * The chunk lists and such SHOULD be empty but we check them just
 4972          * in case.
 4973          */
 4974         /* anything on the wheel needs to be removed */
 4975         for (i = 0; i < asoc->streamoutcnt; i++) {
 4976                 struct sctp_stream_out *outs;
 4977 
 4978                 outs = &asoc->strmout[i];
 4979                 /* now clean up any chunks here */
 4980                 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) {
 4981                         atomic_subtract_int(&asoc->stream_queue_cnt, 1);
 4982                         TAILQ_REMOVE(&outs->outqueue, sp, next);
 4983                         stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, outs, sp, 0);
 4984                         sctp_free_spbufspace(stcb, asoc, sp);
 4985                         if (sp->data) {
 4986                                 if (so) {
 4987                                         /* Still an open socket - report */
 4988                                         sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb,
 4989                                             0, (void *)sp, SCTP_SO_LOCKED);
 4990                                 }
 4991                                 if (sp->data) {
 4992                                         sctp_m_freem(sp->data);
 4993                                         sp->data = NULL;
 4994                                         sp->tail_mbuf = NULL;
 4995                                         sp->length = 0;
 4996                                 }
 4997                         }
 4998                         if (sp->net) {
 4999                                 sctp_free_remote_addr(sp->net);
 5000                                 sp->net = NULL;
 5001                         }
 5002                         sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
 5003                 }
 5004         }
 5005         /* sa_ignore FREED_MEMORY */
 5006         TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) {
 5007                 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp);
 5008                 SCTP_FREE(strrst, SCTP_M_STRESET);
 5009         }
 5010         TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) {
 5011                 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
 5012                 if (sq->data) {
 5013                         sctp_m_freem(sq->data);
 5014                         sq->data = NULL;
 5015                 }
 5016                 sctp_free_remote_addr(sq->whoFrom);
 5017                 sq->whoFrom = NULL;
 5018                 sq->stcb = NULL;
 5019                 /* Free the ctl entry */
 5020                 sctp_free_a_readq(stcb, sq);
 5021                 /* sa_ignore FREED_MEMORY */
 5022         }
 5023         TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) {
 5024                 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next);
 5025                 if (chk->data) {
 5026                         sctp_m_freem(chk->data);
 5027                         chk->data = NULL;
 5028                 }
 5029                 if (chk->holds_key_ref)
 5030                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
 5031                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
 5032                 SCTP_DECR_CHK_COUNT();
 5033                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1);
 5034                 asoc->free_chunk_cnt--;
 5035                 /* sa_ignore FREED_MEMORY */
 5036         }
 5037         /* pending send queue SHOULD be empty */
 5038         TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
 5039                 if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) {
 5040                         asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--;
 5041 #ifdef INVARIANTS
 5042                 } else {
 5043                         panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number);
 5044 #endif
 5045                 }
 5046                 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
 5047                 if (chk->data) {
 5048                         if (so) {
 5049                                 /* Still a socket? */
 5050                                 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb,
 5051                                     0, chk, SCTP_SO_LOCKED);
 5052                         }
 5053                         if (chk->data) {
 5054                                 sctp_m_freem(chk->data);
 5055                                 chk->data = NULL;
 5056                         }
 5057                 }
 5058                 if (chk->holds_key_ref)
 5059                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
 5060                 if (chk->whoTo) {
 5061                         sctp_free_remote_addr(chk->whoTo);
 5062                         chk->whoTo = NULL;
 5063                 }
 5064                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
 5065                 SCTP_DECR_CHK_COUNT();
 5066                 /* sa_ignore FREED_MEMORY */
 5067         }
 5068         /* sent queue SHOULD be empty */
 5069         TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) {
 5070                 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) {
 5071                         if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) {
 5072                                 asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--;
 5073 #ifdef INVARIANTS
 5074                         } else {
 5075                                 panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number);
 5076 #endif
 5077                         }
 5078                 }
 5079                 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
 5080                 if (chk->data) {
 5081                         if (so) {
 5082                                 /* Still a socket? */
 5083                                 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb,
 5084                                     0, chk, SCTP_SO_LOCKED);
 5085                         }
 5086                         if (chk->data) {
 5087                                 sctp_m_freem(chk->data);
 5088                                 chk->data = NULL;
 5089                         }
 5090                 }
 5091                 if (chk->holds_key_ref)
 5092                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
 5093                 sctp_free_remote_addr(chk->whoTo);
 5094                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
 5095                 SCTP_DECR_CHK_COUNT();
 5096                 /* sa_ignore FREED_MEMORY */
 5097         }
 5098 #ifdef INVARIANTS
 5099         for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
 5100                 if (stcb->asoc.strmout[i].chunks_on_queues > 0) {
 5101                         panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i);
 5102                 }
 5103         }
 5104 #endif
 5105         /* control queue MAY not be empty */
 5106         TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
 5107                 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
 5108                 if (chk->data) {
 5109                         sctp_m_freem(chk->data);
 5110                         chk->data = NULL;
 5111                 }
 5112                 if (chk->holds_key_ref)
 5113                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
 5114                 sctp_free_remote_addr(chk->whoTo);
 5115                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
 5116                 SCTP_DECR_CHK_COUNT();
 5117                 /* sa_ignore FREED_MEMORY */
 5118         }
 5119         /* ASCONF queue MAY not be empty */
 5120         TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
 5121                 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
 5122                 if (chk->data) {
 5123                         sctp_m_freem(chk->data);
 5124                         chk->data = NULL;
 5125                 }
 5126                 if (chk->holds_key_ref)
 5127                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
 5128                 sctp_free_remote_addr(chk->whoTo);
 5129                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
 5130                 SCTP_DECR_CHK_COUNT();
 5131                 /* sa_ignore FREED_MEMORY */
 5132         }
 5133         if (asoc->mapping_array) {
 5134                 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
 5135                 asoc->mapping_array = NULL;
 5136         }
 5137         if (asoc->nr_mapping_array) {
 5138                 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
 5139                 asoc->nr_mapping_array = NULL;
 5140         }
 5141         /* the stream outs */
 5142         if (asoc->strmout) {
 5143                 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
 5144                 asoc->strmout = NULL;
 5145         }
 5146         asoc->strm_realoutsize = asoc->streamoutcnt = 0;
 5147         if (asoc->strmin) {
 5148                 for (i = 0; i < asoc->streamincnt; i++) {
 5149                         sctp_clean_up_stream(stcb, &asoc->strmin[i].inqueue);
 5150                         sctp_clean_up_stream(stcb, &asoc->strmin[i].uno_inqueue);
 5151                 }
 5152                 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
 5153                 asoc->strmin = NULL;
 5154         }
 5155         asoc->streamincnt = 0;
 5156         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
 5157 #ifdef INVARIANTS
 5158                 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) {
 5159                         panic("no net's left alloc'ed, or list points to itself");
 5160                 }
 5161 #endif
 5162                 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
 5163                 sctp_free_remote_addr(net);
 5164         }
 5165         LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) {
 5166                 /* sa_ignore FREED_MEMORY */
 5167                 sctp_remove_laddr(laddr);
 5168         }
 5169 
 5170         /* pending asconf (address) parameters */
 5171         TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) {
 5172                 /* sa_ignore FREED_MEMORY */
 5173                 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
 5174                 SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
 5175         }
 5176         TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) {
 5177                 /* sa_ignore FREED_MEMORY */
 5178                 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next);
 5179                 if (aack->data != NULL) {
 5180                         sctp_m_freem(aack->data);
 5181                 }
 5182                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack);
 5183         }
 5184         /* clean up auth stuff */
 5185         if (asoc->local_hmacs)
 5186                 sctp_free_hmaclist(asoc->local_hmacs);
 5187         if (asoc->peer_hmacs)
 5188                 sctp_free_hmaclist(asoc->peer_hmacs);
 5189 
 5190         if (asoc->local_auth_chunks)
 5191                 sctp_free_chunklist(asoc->local_auth_chunks);
 5192         if (asoc->peer_auth_chunks)
 5193                 sctp_free_chunklist(asoc->peer_auth_chunks);
 5194 
 5195         sctp_free_authinfo(&asoc->authinfo);
 5196 
 5197         LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) {
 5198                 LIST_REMOVE(shared_key, next);
 5199                 sctp_free_sharedkey(shared_key);
 5200                 /* sa_ignore FREED_MEMORY */
 5201         }
 5202 
 5203         /* Insert new items here :> */
 5204 
 5205         /* Get rid of LOCK */
 5206         SCTP_TCB_UNLOCK(stcb);
 5207         SCTP_TCB_LOCK_DESTROY(stcb);
 5208         SCTP_TCB_SEND_LOCK_DESTROY(stcb);
 5209         if (from_inpcbfree == SCTP_NORMAL_PROC) {
 5210                 SCTP_INP_INFO_WUNLOCK();
 5211                 SCTP_INP_RLOCK(inp);
 5212         }
 5213 #ifdef SCTP_TRACK_FREED_ASOCS
 5214         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
 5215                 /* now clean up the tasoc itself */
 5216                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
 5217                 SCTP_DECR_ASOC_COUNT();
 5218         } else {
 5219                 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist);
 5220         }
 5221 #else
 5222         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
 5223         SCTP_DECR_ASOC_COUNT();
 5224 #endif
 5225         if (from_inpcbfree == SCTP_NORMAL_PROC) {
 5226                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
 5227                         /*
 5228                          * If its NOT the inp_free calling us AND sctp_close
 5229                          * as been called, we call back...
 5230                          */
 5231                         SCTP_INP_RUNLOCK(inp);
 5232                         /*
 5233                          * This will start the kill timer (if we are the
 5234                          * last one) since we hold an increment yet. But
 5235                          * this is the only safe way to do this since
 5236                          * otherwise if the socket closes at the same time
 5237                          * we are here we might collide in the cleanup.
 5238                          */
 5239                         sctp_inpcb_free(inp,
 5240                             SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE,
 5241                             SCTP_CALLED_DIRECTLY_NOCMPSET);
 5242                         SCTP_INP_DECR_REF(inp);
 5243                         goto out_of;
 5244                 } else {
 5245                         /* The socket is still open. */
 5246                         SCTP_INP_DECR_REF(inp);
 5247                 }
 5248         }
 5249         if (from_inpcbfree == SCTP_NORMAL_PROC) {
 5250                 SCTP_INP_RUNLOCK(inp);
 5251         }
 5252 out_of:
 5253         /* destroyed the asoc */
 5254 #ifdef SCTP_LOG_CLOSING
 5255         sctp_log_closing(inp, NULL, 11);
 5256 #endif
 5257         return (1);
 5258 }
 5259 
 5260 
 5261 
 5262 /*
 5263  * determine if a destination is "reachable" based upon the addresses bound
 5264  * to the current endpoint (e.g. only v4 or v6 currently bound)
 5265  */
 5266 /*
 5267  * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use
 5268  * assoc level v4/v6 flags, as the assoc *may* not have the same address
 5269  * types bound as its endpoint
 5270  */
 5271 int
 5272 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
 5273 {
 5274         struct sctp_inpcb *inp;
 5275         int answer;
 5276 
 5277         /*
 5278          * No locks here, the TCB, in all cases is already locked and an
 5279          * assoc is up. There is either a INP lock by the caller applied (in
 5280          * asconf case when deleting an address) or NOT in the HB case,
 5281          * however if HB then the INP increment is up and the INP will not
 5282          * be removed (on top of the fact that we have a TCB lock). So we
 5283          * only want to read the sctp_flags, which is either bound-all or
 5284          * not.. no protection needed since once an assoc is up you can't be
 5285          * changing your binding.
 5286          */
 5287         inp = stcb->sctp_ep;
 5288         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
 5289                 /* if bound all, destination is not restricted */
 5290                 /*
 5291                  * RRS: Question during lock work: Is this correct? If you
 5292                  * are bound-all you still might need to obey the V4--V6
 5293                  * flags??? IMO this bound-all stuff needs to be removed!
 5294                  */
 5295                 return (1);
 5296         }
 5297         /* NOTE: all "scope" checks are done when local addresses are added */
 5298         switch (destaddr->sa_family) {
 5299 #ifdef INET6
 5300         case AF_INET6:
 5301                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
 5302                 break;
 5303 #endif
 5304 #ifdef INET
 5305         case AF_INET:
 5306                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
 5307                 break;
 5308 #endif
 5309         default:
 5310                 /* invalid family, so it's unreachable */
 5311                 answer = 0;
 5312                 break;
 5313         }
 5314         return (answer);
 5315 }
 5316 
 5317 /*
 5318  * update the inp_vflags on an endpoint
 5319  */
 5320 static void
 5321 sctp_update_ep_vflag(struct sctp_inpcb *inp)
 5322 {
 5323         struct sctp_laddr *laddr;
 5324 
 5325         /* first clear the flag */
 5326         inp->ip_inp.inp.inp_vflag = 0;
 5327         /* set the flag based on addresses on the ep list */
 5328         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
 5329                 if (laddr->ifa == NULL) {
 5330                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
 5331                             __func__);
 5332                         continue;
 5333                 }
 5334                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
 5335                         continue;
 5336                 }
 5337                 switch (laddr->ifa->address.sa.sa_family) {
 5338 #ifdef INET6
 5339                 case AF_INET6:
 5340                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
 5341                         break;
 5342 #endif
 5343 #ifdef INET
 5344                 case AF_INET:
 5345                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
 5346                         break;
 5347 #endif
 5348                 default:
 5349                         break;
 5350                 }
 5351         }
 5352 }
 5353 
 5354 /*
 5355  * Add the address to the endpoint local address list There is nothing to be
 5356  * done if we are bound to all addresses
 5357  */
 5358 void
 5359 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action)
 5360 {
 5361         struct sctp_laddr *laddr;
 5362         struct sctp_tcb *stcb;
 5363         int fnd, error = 0;
 5364 
 5365         fnd = 0;
 5366 
 5367         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
 5368                 /* You are already bound to all. You have it already */
 5369                 return;
 5370         }
 5371 #ifdef INET6
 5372         if (ifa->address.sa.sa_family == AF_INET6) {
 5373                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
 5374                         /* Can't bind a non-useable addr. */
 5375                         return;
 5376                 }
 5377         }
 5378 #endif
 5379         /* first, is it already present? */
 5380         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
 5381                 if (laddr->ifa == ifa) {
 5382                         fnd = 1;
 5383                         break;
 5384                 }
 5385         }
 5386 
 5387         if (fnd == 0) {
 5388                 /* Not in the ep list */
 5389                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action);
 5390                 if (error != 0)
 5391                         return;
 5392                 inp->laddr_count++;
 5393                 /* update inp_vflag flags */
 5394                 switch (ifa->address.sa.sa_family) {
 5395 #ifdef INET6
 5396                 case AF_INET6:
 5397                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
 5398                         break;
 5399 #endif
 5400 #ifdef INET
 5401                 case AF_INET:
 5402                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
 5403                         break;
 5404 #endif
 5405                 default:
 5406                         break;
 5407                 }
 5408                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
 5409                         sctp_add_local_addr_restricted(stcb, ifa);
 5410                 }
 5411         }
 5412         return;
 5413 }
 5414 
 5415 
 5416 /*
 5417  * select a new (hopefully reachable) destination net (should only be used
 5418  * when we deleted an ep addr that is the only usable source address to reach
 5419  * the destination net)
 5420  */
 5421 static void
 5422 sctp_select_primary_destination(struct sctp_tcb *stcb)
 5423 {
 5424         struct sctp_nets *net;
 5425 
 5426         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 5427                 /* for now, we'll just pick the first reachable one we find */
 5428                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
 5429                         continue;
 5430                 if (sctp_destination_is_reachable(stcb,
 5431                     (struct sockaddr *)&net->ro._l_addr)) {
 5432                         /* found a reachable destination */
 5433                         stcb->asoc.primary_destination = net;
 5434                 }
 5435         }
 5436         /* I can't there from here! ...we're gonna die shortly... */
 5437 }
 5438 
 5439 
 5440 /*
 5441  * Delete the address from the endpoint local address list. There is nothing
 5442  * to be done if we are bound to all addresses
 5443  */
 5444 void
 5445 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
 5446 {
 5447         struct sctp_laddr *laddr;
 5448         int fnd;
 5449 
 5450         fnd = 0;
 5451         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
 5452                 /* You are already bound to all. You have it already */
 5453                 return;
 5454         }
 5455         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
 5456                 if (laddr->ifa == ifa) {
 5457                         fnd = 1;
 5458                         break;
 5459                 }
 5460         }
 5461         if (fnd && (inp->laddr_count < 2)) {
 5462                 /* can't delete unless there are at LEAST 2 addresses */
 5463                 return;
 5464         }
 5465         if (fnd) {
 5466                 /*
 5467                  * clean up any use of this address go through our
 5468                  * associations and clear any last_used_address that match
 5469                  * this one for each assoc, see if a new primary_destination
 5470                  * is needed
 5471                  */
 5472                 struct sctp_tcb *stcb;
 5473 
 5474                 /* clean up "next_addr_touse" */
 5475                 if (inp->next_addr_touse == laddr)
 5476                         /* delete this address */
 5477                         inp->next_addr_touse = NULL;
 5478 
 5479                 /* clean up "last_used_address" */
 5480                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
 5481                         struct sctp_nets *net;
 5482 
 5483                         SCTP_TCB_LOCK(stcb);
 5484                         if (stcb->asoc.last_used_address == laddr)
 5485                                 /* delete this address */
 5486                                 stcb->asoc.last_used_address = NULL;
 5487                         /*
 5488                          * Now spin through all the nets and purge any ref
 5489                          * to laddr
 5490                          */
 5491                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 5492                                 if (net->ro._s_addr == laddr->ifa) {
 5493                                         /* Yep, purge src address selected */
 5494                                         sctp_rtentry_t *rt;
 5495 
 5496                                         /* delete this address if cached */
 5497                                         rt = net->ro.ro_rt;
 5498                                         if (rt != NULL) {
 5499                                                 RTFREE(rt);
 5500                                                 net->ro.ro_rt = NULL;
 5501                                         }
 5502                                         sctp_free_ifa(net->ro._s_addr);
 5503                                         net->ro._s_addr = NULL;
 5504                                         net->src_addr_selected = 0;
 5505                                 }
 5506                         }
 5507                         SCTP_TCB_UNLOCK(stcb);
 5508                 }               /* for each tcb */
 5509                 /* remove it from the ep list */
 5510                 sctp_remove_laddr(laddr);
 5511                 inp->laddr_count--;
 5512                 /* update inp_vflag flags */
 5513                 sctp_update_ep_vflag(inp);
 5514         }
 5515         return;
 5516 }
 5517 
 5518 /*
 5519  * Add the address to the TCB local address restricted list.
 5520  * This is a "pending" address list (eg. addresses waiting for an
 5521  * ASCONF-ACK response) and cannot be used as a valid source address.
 5522  */
 5523 void
 5524 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
 5525 {
 5526         struct sctp_laddr *laddr;
 5527         struct sctpladdr *list;
 5528 
 5529         /*
 5530          * Assumes TCB is locked.. and possibly the INP. May need to
 5531          * confirm/fix that if we need it and is not the case.
 5532          */
 5533         list = &stcb->asoc.sctp_restricted_addrs;
 5534 
 5535 #ifdef INET6
 5536         if (ifa->address.sa.sa_family == AF_INET6) {
 5537                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
 5538                         /* Can't bind a non-existent addr. */
 5539                         return;
 5540                 }
 5541         }
 5542 #endif
 5543         /* does the address already exist? */
 5544         LIST_FOREACH(laddr, list, sctp_nxt_addr) {
 5545                 if (laddr->ifa == ifa) {
 5546                         return;
 5547                 }
 5548         }
 5549 
 5550         /* add to the list */
 5551         (void)sctp_insert_laddr(list, ifa, 0);
 5552         return;
 5553 }
 5554 
 5555 /*
 5556  * Remove a local address from the TCB local address restricted list
 5557  */
 5558 void
 5559 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
 5560 {
 5561         struct sctp_inpcb *inp;
 5562         struct sctp_laddr *laddr;
 5563 
 5564         /*
 5565          * This is called by asconf work. It is assumed that a) The TCB is
 5566          * locked and b) The INP is locked. This is true in as much as I can
 5567          * trace through the entry asconf code where I did these locks.
 5568          * Again, the ASCONF code is a bit different in that it does lock
 5569          * the INP during its work often times. This must be since we don't
 5570          * want other proc's looking up things while what they are looking
 5571          * up is changing :-D
 5572          */
 5573 
 5574         inp = stcb->sctp_ep;
 5575         /* if subset bound and don't allow ASCONF's, can't delete last */
 5576         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
 5577             sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
 5578                 if (stcb->sctp_ep->laddr_count < 2) {
 5579                         /* can't delete last address */
 5580                         return;
 5581                 }
 5582         }
 5583         LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
 5584                 /* remove the address if it exists */
 5585                 if (laddr->ifa == NULL)
 5586                         continue;
 5587                 if (laddr->ifa == ifa) {
 5588                         sctp_remove_laddr(laddr);
 5589                         return;
 5590                 }
 5591         }
 5592 
 5593         /* address not found! */
 5594         return;
 5595 }
 5596 
 5597 /*
 5598  * Temporarily remove for __APPLE__ until we use the Tiger equivalents
 5599  */
 5600 /* sysctl */
 5601 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
 5602 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
 5603 
 5604 
 5605 
 5606 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
 5607 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL;
 5608 int *sctp_cpuarry = NULL;
 5609 void
 5610 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use)
 5611 {
 5612         /* Queue a packet to a processor for the specified core */
 5613         struct sctp_mcore_queue *qent;
 5614         struct sctp_mcore_ctrl *wkq;
 5615         int need_wake = 0;
 5616 
 5617         if (sctp_mcore_workers == NULL) {
 5618                 /* Something went way bad during setup */
 5619                 sctp_input_with_port(m, off, 0);
 5620                 return;
 5621         }
 5622         SCTP_MALLOC(qent, struct sctp_mcore_queue *,
 5623             (sizeof(struct sctp_mcore_queue)),
 5624             SCTP_M_MCORE);
 5625         if (qent == NULL) {
 5626                 /* This is trouble  */
 5627                 sctp_input_with_port(m, off, 0);
 5628                 return;
 5629         }
 5630         qent->vn = curvnet;
 5631         qent->m = m;
 5632         qent->off = off;
 5633         qent->v6 = 0;
 5634         wkq = &sctp_mcore_workers[cpu_to_use];
 5635         SCTP_MCORE_QLOCK(wkq);
 5636 
 5637         TAILQ_INSERT_TAIL(&wkq->que, qent, next);
 5638         if (wkq->running == 0) {
 5639                 need_wake = 1;
 5640         }
 5641         SCTP_MCORE_QUNLOCK(wkq);
 5642         if (need_wake) {
 5643                 wakeup(&wkq->running);
 5644         }
 5645 }
 5646 
 5647 static void
 5648 sctp_mcore_thread(void *arg)
 5649 {
 5650 
 5651         struct sctp_mcore_ctrl *wkq;
 5652         struct sctp_mcore_queue *qent;
 5653 
 5654         wkq = (struct sctp_mcore_ctrl *)arg;
 5655         struct mbuf *m;
 5656         int off, v6;
 5657 
 5658         /* Wait for first tickle */
 5659         SCTP_MCORE_LOCK(wkq);
 5660         wkq->running = 0;
 5661         msleep(&wkq->running,
 5662             &wkq->core_mtx,
 5663             0, "wait for pkt", 0);
 5664         SCTP_MCORE_UNLOCK(wkq);
 5665 
 5666         /* Bind to our cpu */
 5667         thread_lock(curthread);
 5668         sched_bind(curthread, wkq->cpuid);
 5669         thread_unlock(curthread);
 5670 
 5671         /* Now lets start working */
 5672         SCTP_MCORE_LOCK(wkq);
 5673         /* Now grab lock and go */
 5674         for (;;) {
 5675                 SCTP_MCORE_QLOCK(wkq);
 5676 skip_sleep:
 5677                 wkq->running = 1;
 5678                 qent = TAILQ_FIRST(&wkq->que);
 5679                 if (qent) {
 5680                         TAILQ_REMOVE(&wkq->que, qent, next);
 5681                         SCTP_MCORE_QUNLOCK(wkq);
 5682                         CURVNET_SET(qent->vn);
 5683                         m = qent->m;
 5684                         off = qent->off;
 5685                         v6 = qent->v6;
 5686                         SCTP_FREE(qent, SCTP_M_MCORE);
 5687                         if (v6 == 0) {
 5688                                 sctp_input_with_port(m, off, 0);
 5689                         } else {
 5690                                 SCTP_PRINTF("V6 not yet supported\n");
 5691                                 sctp_m_freem(m);
 5692                         }
 5693                         CURVNET_RESTORE();
 5694                         SCTP_MCORE_QLOCK(wkq);
 5695                 }
 5696                 wkq->running = 0;
 5697                 if (!TAILQ_EMPTY(&wkq->que)) {
 5698                         goto skip_sleep;
 5699                 }
 5700                 SCTP_MCORE_QUNLOCK(wkq);
 5701                 msleep(&wkq->running,
 5702                     &wkq->core_mtx,
 5703                     0, "wait for pkt", 0);
 5704         }
 5705 }
 5706 
 5707 static void
 5708 sctp_startup_mcore_threads(void)
 5709 {
 5710         int i, cpu;
 5711 
 5712         if (mp_ncpus == 1)
 5713                 return;
 5714 
 5715         if (sctp_mcore_workers != NULL) {
 5716                 /*
 5717                  * Already been here in some previous vnet?
 5718                  */
 5719                 return;
 5720         }
 5721         SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *,
 5722             ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)),
 5723             SCTP_M_MCORE);
 5724         if (sctp_mcore_workers == NULL) {
 5725                 /* TSNH I hope */
 5726                 return;
 5727         }
 5728         memset(sctp_mcore_workers, 0, ((mp_maxid + 1) *
 5729             sizeof(struct sctp_mcore_ctrl)));
 5730         /* Init the structures */
 5731         for (i = 0; i <= mp_maxid; i++) {
 5732                 TAILQ_INIT(&sctp_mcore_workers[i].que);
 5733                 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]);
 5734                 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]);
 5735                 sctp_mcore_workers[i].cpuid = i;
 5736         }
 5737         if (sctp_cpuarry == NULL) {
 5738                 SCTP_MALLOC(sctp_cpuarry, int *,
 5739                     (mp_ncpus * sizeof(int)),
 5740                     SCTP_M_MCORE);
 5741                 i = 0;
 5742                 CPU_FOREACH(cpu) {
 5743                         sctp_cpuarry[i] = cpu;
 5744                         i++;
 5745                 }
 5746         }
 5747         /* Now start them all */
 5748         CPU_FOREACH(cpu) {
 5749                 (void)kproc_create(sctp_mcore_thread,
 5750                     (void *)&sctp_mcore_workers[cpu],
 5751                     &sctp_mcore_workers[cpu].thread_proc,
 5752                     RFPROC,
 5753                     SCTP_KTHREAD_PAGES,
 5754                     SCTP_MCORE_NAME);
 5755 
 5756         }
 5757 }
 5758 
 5759 #endif
 5760 
 5761 void
 5762 sctp_pcb_init()
 5763 {
 5764         /*
 5765          * SCTP initialization for the PCB structures should be called by
 5766          * the sctp_init() function.
 5767          */
 5768         int i;
 5769         struct timeval tv;
 5770 
 5771         if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) {
 5772                 /* error I was called twice */
 5773                 return;
 5774         }
 5775         SCTP_BASE_VAR(sctp_pcb_initialized) = 1;
 5776 
 5777 #if defined(SCTP_LOCAL_TRACE_BUF)
 5778         bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log));
 5779 #endif
 5780 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
 5781         SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *,
 5782             ((mp_maxid + 1) * sizeof(struct sctpstat)),
 5783             SCTP_M_MCORE);
 5784 #endif
 5785         (void)SCTP_GETTIME_TIMEVAL(&tv);
 5786 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
 5787         bzero(SCTP_BASE_STATS, (sizeof(struct sctpstat) * (mp_maxid + 1)));
 5788         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t) tv.tv_sec;
 5789         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t) tv.tv_usec;
 5790 #else
 5791         bzero(&SCTP_BASE_STATS, sizeof(struct sctpstat));
 5792         SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t) tv.tv_sec;
 5793         SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t) tv.tv_usec;
 5794 #endif
 5795         /* init the empty list of (All) Endpoints */
 5796         LIST_INIT(&SCTP_BASE_INFO(listhead));
 5797 
 5798 
 5799         /* init the hash table of endpoints */
 5800         TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize));
 5801         TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize));
 5802         TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale));
 5803         SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31),
 5804             &SCTP_BASE_INFO(hashasocmark));
 5805         SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
 5806             &SCTP_BASE_INFO(hashmark));
 5807         SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
 5808             &SCTP_BASE_INFO(hashtcpmark));
 5809         SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize);
 5810 
 5811 
 5812         SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH,
 5813             &SCTP_BASE_INFO(hashvrfmark));
 5814 
 5815         SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE,
 5816             &SCTP_BASE_INFO(vrf_ifn_hashmark));
 5817         /* init the zones */
 5818         /*
 5819          * FIX ME: Should check for NULL returns, but if it does fail we are
 5820          * doomed to panic anyways... add later maybe.
 5821          */
 5822         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep",
 5823             sizeof(struct sctp_inpcb), maxsockets);
 5824 
 5825         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc",
 5826             sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
 5827 
 5828         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr",
 5829             sizeof(struct sctp_laddr),
 5830             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
 5831 
 5832         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr",
 5833             sizeof(struct sctp_nets),
 5834             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
 5835 
 5836         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk",
 5837             sizeof(struct sctp_tmit_chunk),
 5838             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
 5839 
 5840         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq",
 5841             sizeof(struct sctp_queued_to_read),
 5842             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
 5843 
 5844         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out",
 5845             sizeof(struct sctp_stream_queue_pending),
 5846             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
 5847 
 5848         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf",
 5849             sizeof(struct sctp_asconf),
 5850             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
 5851 
 5852         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack",
 5853             sizeof(struct sctp_asconf_ack),
 5854             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
 5855 
 5856 
 5857         /* Master Lock INIT for info structure */
 5858         SCTP_INP_INFO_LOCK_INIT();
 5859         SCTP_STATLOG_INIT_LOCK();
 5860 
 5861         SCTP_IPI_COUNT_INIT();
 5862         SCTP_IPI_ADDR_INIT();
 5863 #ifdef SCTP_PACKET_LOGGING
 5864         SCTP_IP_PKTLOG_INIT();
 5865 #endif
 5866         LIST_INIT(&SCTP_BASE_INFO(addr_wq));
 5867 
 5868         SCTP_WQ_ADDR_INIT();
 5869         /* not sure if we need all the counts */
 5870         SCTP_BASE_INFO(ipi_count_ep) = 0;
 5871         /* assoc/tcb zone info */
 5872         SCTP_BASE_INFO(ipi_count_asoc) = 0;
 5873         /* local addrlist zone info */
 5874         SCTP_BASE_INFO(ipi_count_laddr) = 0;
 5875         /* remote addrlist zone info */
 5876         SCTP_BASE_INFO(ipi_count_raddr) = 0;
 5877         /* chunk info */
 5878         SCTP_BASE_INFO(ipi_count_chunk) = 0;
 5879 
 5880         /* socket queue zone info */
 5881         SCTP_BASE_INFO(ipi_count_readq) = 0;
 5882 
 5883         /* stream out queue cont */
 5884         SCTP_BASE_INFO(ipi_count_strmoq) = 0;
 5885 
 5886         SCTP_BASE_INFO(ipi_free_strmoq) = 0;
 5887         SCTP_BASE_INFO(ipi_free_chunks) = 0;
 5888 
 5889         SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer));
 5890 
 5891         /* Init the TIMEWAIT list */
 5892         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
 5893                 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]);
 5894         }
 5895         sctp_startup_iterator();
 5896 
 5897 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
 5898         sctp_startup_mcore_threads();
 5899 #endif
 5900 
 5901         /*
 5902          * INIT the default VRF which for BSD is the only one, other O/S's
 5903          * may have more. But initially they must start with one and then
 5904          * add the VRF's as addresses are added.
 5905          */
 5906         sctp_init_vrf_list(SCTP_DEFAULT_VRF);
 5907 }
 5908 
 5909 /*
 5910  * Assumes that the SCTP_BASE_INFO() lock is NOT held.
 5911  */
 5912 void
 5913 sctp_pcb_finish(void)
 5914 {
 5915         struct sctp_vrflist *vrf_bucket;
 5916         struct sctp_vrf *vrf, *nvrf;
 5917         struct sctp_ifn *ifn, *nifn;
 5918         struct sctp_ifa *ifa, *nifa;
 5919         struct sctpvtaghead *chain;
 5920         struct sctp_tagblock *twait_block, *prev_twait_block;
 5921         struct sctp_laddr *wi, *nwi;
 5922         int i;
 5923         struct sctp_iterator *it, *nit;
 5924 
 5925         if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
 5926                 SCTP_PRINTF("%s: race condition on teardown.\n", __func__);
 5927                 return;
 5928         }
 5929         SCTP_BASE_VAR(sctp_pcb_initialized) = 0;
 5930         /*
 5931          * In FreeBSD the iterator thread never exits but we do clean up.
 5932          * The only way FreeBSD reaches here is if we have VRF's but we
 5933          * still add the ifdef to make it compile on old versions.
 5934          */
 5935 retry:
 5936         SCTP_IPI_ITERATOR_WQ_LOCK();
 5937         /*
 5938          * sctp_iterator_worker() might be working on an it entry without
 5939          * holding the lock.  We won't find it on the list either and
 5940          * continue and free/destroy it.  While holding the lock, spin, to
 5941          * avoid the race condition as sctp_iterator_worker() will have to
 5942          * wait to re-aquire the lock.
 5943          */
 5944         if (sctp_it_ctl.iterator_running != 0 || sctp_it_ctl.cur_it != NULL) {
 5945                 SCTP_IPI_ITERATOR_WQ_UNLOCK();
 5946                 SCTP_PRINTF("%s: Iterator running while we held the lock. Retry. "
 5947                     "cur_it=%p\n", __func__, sctp_it_ctl.cur_it);
 5948                 DELAY(10);
 5949                 goto retry;
 5950         }
 5951         TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
 5952                 if (it->vn != curvnet) {
 5953                         continue;
 5954                 }
 5955                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
 5956                 if (it->function_atend != NULL) {
 5957                         (*it->function_atend) (it->pointer, it->val);
 5958                 }
 5959                 SCTP_FREE(it, SCTP_M_ITER);
 5960         }
 5961         SCTP_IPI_ITERATOR_WQ_UNLOCK();
 5962         SCTP_ITERATOR_LOCK();
 5963         if ((sctp_it_ctl.cur_it) &&
 5964             (sctp_it_ctl.cur_it->vn == curvnet)) {
 5965                 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
 5966         }
 5967         SCTP_ITERATOR_UNLOCK();
 5968         SCTP_OS_TIMER_STOP_DRAIN(&SCTP_BASE_INFO(addr_wq_timer.timer));
 5969         SCTP_WQ_ADDR_LOCK();
 5970         LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) {
 5971                 LIST_REMOVE(wi, sctp_nxt_addr);
 5972                 SCTP_DECR_LADDR_COUNT();
 5973                 if (wi->action == SCTP_DEL_IP_ADDRESS) {
 5974                         SCTP_FREE(wi->ifa, SCTP_M_IFA);
 5975                 }
 5976                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi);
 5977         }
 5978         SCTP_WQ_ADDR_UNLOCK();
 5979 
 5980         /*
 5981          * free the vrf/ifn/ifa lists and hashes (be sure address monitor is
 5982          * destroyed first).
 5983          */
 5984         vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))];
 5985         LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) {
 5986                 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) {
 5987                         LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) {
 5988                                 /* free the ifa */
 5989                                 LIST_REMOVE(ifa, next_bucket);
 5990                                 LIST_REMOVE(ifa, next_ifa);
 5991                                 SCTP_FREE(ifa, SCTP_M_IFA);
 5992                         }
 5993                         /* free the ifn */
 5994                         LIST_REMOVE(ifn, next_bucket);
 5995                         LIST_REMOVE(ifn, next_ifn);
 5996                         SCTP_FREE(ifn, SCTP_M_IFN);
 5997                 }
 5998                 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
 5999                 /* free the vrf */
 6000                 LIST_REMOVE(vrf, next_vrf);
 6001                 SCTP_FREE(vrf, SCTP_M_VRF);
 6002         }
 6003         /* free the vrf hashes */
 6004         SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark));
 6005         SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark));
 6006 
 6007         /*
 6008          * free the TIMEWAIT list elements malloc'd in the function
 6009          * sctp_add_vtag_to_timewait()...
 6010          */
 6011         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
 6012                 chain = &SCTP_BASE_INFO(vtag_timewait)[i];
 6013                 if (!LIST_EMPTY(chain)) {
 6014                         prev_twait_block = NULL;
 6015                         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
 6016                                 if (prev_twait_block) {
 6017                                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
 6018                                 }
 6019                                 prev_twait_block = twait_block;
 6020                         }
 6021                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
 6022                 }
 6023         }
 6024 
 6025         /* free the locks and mutexes */
 6026 #ifdef SCTP_PACKET_LOGGING
 6027         SCTP_IP_PKTLOG_DESTROY();
 6028 #endif
 6029         SCTP_IPI_ADDR_DESTROY();
 6030         SCTP_STATLOG_DESTROY();
 6031         SCTP_INP_INFO_LOCK_DESTROY();
 6032 
 6033         SCTP_WQ_ADDR_DESTROY();
 6034 
 6035         /* Get rid of other stuff too. */
 6036         if (SCTP_BASE_INFO(sctp_asochash) != NULL)
 6037                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark));
 6038         if (SCTP_BASE_INFO(sctp_ephash) != NULL)
 6039                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark));
 6040         if (SCTP_BASE_INFO(sctp_tcpephash) != NULL)
 6041                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark));
 6042 
 6043         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep));
 6044         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc));
 6045         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr));
 6046         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net));
 6047         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk));
 6048         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq));
 6049         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq));
 6050         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf));
 6051         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack));
 6052 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
 6053         SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE);
 6054 #endif
 6055 }
 6056 
 6057 
 6058 int
 6059 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
 6060     int offset, int limit,
 6061     struct sockaddr *src, struct sockaddr *dst,
 6062     struct sockaddr *altsa, uint16_t port)
 6063 {
 6064         /*
 6065          * grub through the INIT pulling addresses and loading them to the
 6066          * nets structure in the asoc. The from address in the mbuf should
 6067          * also be loaded (if it is not already). This routine can be called
 6068          * with either INIT or INIT-ACK's as long as the m points to the IP
 6069          * packet and the offset points to the beginning of the parameters.
 6070          */
 6071         struct sctp_inpcb *inp;
 6072         struct sctp_nets *net, *nnet, *net_tmp;
 6073         struct sctp_paramhdr *phdr, parm_buf;
 6074         struct sctp_tcb *stcb_tmp;
 6075         uint16_t ptype, plen;
 6076         struct sockaddr *sa;
 6077         uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
 6078         struct sctp_auth_random *p_random = NULL;
 6079         uint16_t random_len = 0;
 6080         uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE];
 6081         struct sctp_auth_hmac_algo *hmacs = NULL;
 6082         uint16_t hmacs_len = 0;
 6083         uint8_t saw_asconf = 0;
 6084         uint8_t saw_asconf_ack = 0;
 6085         uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE];
 6086         struct sctp_auth_chunk_list *chunks = NULL;
 6087         uint16_t num_chunks = 0;
 6088         sctp_key_t *new_key;
 6089         uint32_t keylen;
 6090         int got_random = 0, got_hmacs = 0, got_chklist = 0;
 6091         uint8_t peer_supports_ecn;
 6092         uint8_t peer_supports_prsctp;
 6093         uint8_t peer_supports_auth;
 6094         uint8_t peer_supports_asconf;
 6095         uint8_t peer_supports_asconf_ack;
 6096         uint8_t peer_supports_reconfig;
 6097         uint8_t peer_supports_nrsack;
 6098         uint8_t peer_supports_pktdrop;
 6099         uint8_t peer_supports_idata;
 6100 
 6101 #ifdef INET
 6102         struct sockaddr_in sin;
 6103 
 6104 #endif
 6105 #ifdef INET6
 6106         struct sockaddr_in6 sin6;
 6107 
 6108 #endif
 6109 
 6110         /* First get the destination address setup too. */
 6111 #ifdef INET
 6112         memset(&sin, 0, sizeof(sin));
 6113         sin.sin_family = AF_INET;
 6114         sin.sin_len = sizeof(sin);
 6115         sin.sin_port = stcb->rport;
 6116 #endif
 6117 #ifdef INET6
 6118         memset(&sin6, 0, sizeof(sin6));
 6119         sin6.sin6_family = AF_INET6;
 6120         sin6.sin6_len = sizeof(struct sockaddr_in6);
 6121         sin6.sin6_port = stcb->rport;
 6122 #endif
 6123         if (altsa) {
 6124                 sa = altsa;
 6125         } else {
 6126                 sa = src;
 6127         }
 6128         peer_supports_idata = 0;
 6129         peer_supports_ecn = 0;
 6130         peer_supports_prsctp = 0;
 6131         peer_supports_auth = 0;
 6132         peer_supports_asconf = 0;
 6133         peer_supports_reconfig = 0;
 6134         peer_supports_nrsack = 0;
 6135         peer_supports_pktdrop = 0;
 6136         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 6137                 /* mark all addresses that we have currently on the list */
 6138                 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
 6139         }
 6140         /* does the source address already exist? if so skip it */
 6141         inp = stcb->sctp_ep;
 6142         atomic_add_int(&stcb->asoc.refcnt, 1);
 6143         stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb);
 6144         atomic_add_int(&stcb->asoc.refcnt, -1);
 6145 
 6146         if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
 6147                 /* we must add the source address */
 6148                 /* no scope set here since we have a tcb already. */
 6149                 switch (sa->sa_family) {
 6150 #ifdef INET
 6151                 case AF_INET:
 6152                         if (stcb->asoc.scope.ipv4_addr_legal) {
 6153                                 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) {
 6154                                         return (-1);
 6155                                 }
 6156                         }
 6157                         break;
 6158 #endif
 6159 #ifdef INET6
 6160                 case AF_INET6:
 6161                         if (stcb->asoc.scope.ipv6_addr_legal) {
 6162                                 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
 6163                                         return (-2);
 6164                                 }
 6165                         }
 6166                         break;
 6167 #endif
 6168                 default:
 6169                         break;
 6170                 }
 6171         } else {
 6172                 if (net_tmp != NULL && stcb_tmp == stcb) {
 6173                         net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
 6174                 } else if (stcb_tmp != stcb) {
 6175                         /* It belongs to another association? */
 6176                         if (stcb_tmp)
 6177                                 SCTP_TCB_UNLOCK(stcb_tmp);
 6178                         return (-3);
 6179                 }
 6180         }
 6181         if (stcb->asoc.state == 0) {
 6182                 /* the assoc was freed? */
 6183                 return (-4);
 6184         }
 6185         /* now we must go through each of the params. */
 6186         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
 6187         while (phdr) {
 6188                 ptype = ntohs(phdr->param_type);
 6189                 plen = ntohs(phdr->param_length);
 6190                 /*
 6191                  * SCTP_PRINTF("ptype => %0x, plen => %d\n",
 6192                  * (uint32_t)ptype, (int)plen);
 6193                  */
 6194                 if (offset + plen > limit) {
 6195                         break;
 6196                 }
 6197                 if (plen == 0) {
 6198                         break;
 6199                 }
 6200 #ifdef INET
 6201                 if (ptype == SCTP_IPV4_ADDRESS) {
 6202                         if (stcb->asoc.scope.ipv4_addr_legal) {
 6203                                 struct sctp_ipv4addr_param *p4, p4_buf;
 6204 
 6205                                 /* ok get the v4 address and check/add */
 6206                                 phdr = sctp_get_next_param(m, offset,
 6207                                     (struct sctp_paramhdr *)&p4_buf,
 6208                                     sizeof(p4_buf));
 6209                                 if (plen != sizeof(struct sctp_ipv4addr_param) ||
 6210                                     phdr == NULL) {
 6211                                         return (-5);
 6212                                 }
 6213                                 p4 = (struct sctp_ipv4addr_param *)phdr;
 6214                                 sin.sin_addr.s_addr = p4->addr;
 6215                                 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
 6216                                         /* Skip multi-cast addresses */
 6217                                         goto next_param;
 6218                                 }
 6219                                 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) ||
 6220                                     (sin.sin_addr.s_addr == INADDR_ANY)) {
 6221                                         goto next_param;
 6222                                 }
 6223                                 sa = (struct sockaddr *)&sin;
 6224                                 inp = stcb->sctp_ep;
 6225                                 atomic_add_int(&stcb->asoc.refcnt, 1);
 6226                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
 6227                                     dst, stcb);
 6228                                 atomic_add_int(&stcb->asoc.refcnt, -1);
 6229 
 6230                                 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) ||
 6231                                     inp == NULL) {
 6232                                         /* we must add the source address */
 6233                                         /*
 6234                                          * no scope set since we have a tcb
 6235                                          * already
 6236                                          */
 6237 
 6238                                         /*
 6239                                          * we must validate the state again
 6240                                          * here
 6241                                          */
 6242                         add_it_now:
 6243                                         if (stcb->asoc.state == 0) {
 6244                                                 /* the assoc was freed? */
 6245                                                 return (-7);
 6246                                         }
 6247                                         if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) {
 6248                                                 return (-8);
 6249                                         }
 6250                                 } else if (stcb_tmp == stcb) {
 6251                                         if (stcb->asoc.state == 0) {
 6252                                                 /* the assoc was freed? */
 6253                                                 return (-10);
 6254                                         }
 6255                                         if (net != NULL) {
 6256                                                 /* clear flag */
 6257                                                 net->dest_state &=
 6258                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
 6259                                         }
 6260                                 } else {
 6261                                         /*
 6262                                          * strange, address is in another
 6263                                          * assoc? straighten out locks.
 6264                                          */
 6265                                         if (stcb_tmp) {
 6266                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
 6267                                                         struct mbuf *op_err;
 6268                                                         char msg[SCTP_DIAG_INFO_LEN];
 6269 
 6270                                                         /*
 6271                                                          * in setup state we
 6272                                                          * abort this guy
 6273                                                          */
 6274                                                         snprintf(msg, sizeof(msg),
 6275                                                             "%s:%d at %s", __FILE__, __LINE__, __func__);
 6276                                                         op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
 6277                                                             msg);
 6278                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
 6279                                                             stcb_tmp, op_err,
 6280                                                             SCTP_SO_NOT_LOCKED);
 6281                                                         goto add_it_now;
 6282                                                 }
 6283                                                 SCTP_TCB_UNLOCK(stcb_tmp);
 6284                                         }
 6285                                         if (stcb->asoc.state == 0) {
 6286                                                 /* the assoc was freed? */
 6287                                                 return (-12);
 6288                                         }
 6289                                         return (-13);
 6290                                 }
 6291                         }
 6292                 } else
 6293 #endif
 6294 #ifdef INET6
 6295                 if (ptype == SCTP_IPV6_ADDRESS) {
 6296                         if (stcb->asoc.scope.ipv6_addr_legal) {
 6297                                 /* ok get the v6 address and check/add */
 6298                                 struct sctp_ipv6addr_param *p6, p6_buf;
 6299 
 6300                                 phdr = sctp_get_next_param(m, offset,
 6301                                     (struct sctp_paramhdr *)&p6_buf,
 6302                                     sizeof(p6_buf));
 6303                                 if (plen != sizeof(struct sctp_ipv6addr_param) ||
 6304                                     phdr == NULL) {
 6305                                         return (-14);
 6306                                 }
 6307                                 p6 = (struct sctp_ipv6addr_param *)phdr;
 6308                                 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
 6309                                     sizeof(p6->addr));
 6310                                 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
 6311                                         /* Skip multi-cast addresses */
 6312                                         goto next_param;
 6313                                 }
 6314                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
 6315                                         /*
 6316                                          * Link local make no sense without
 6317                                          * scope
 6318                                          */
 6319                                         goto next_param;
 6320                                 }
 6321                                 sa = (struct sockaddr *)&sin6;
 6322                                 inp = stcb->sctp_ep;
 6323                                 atomic_add_int(&stcb->asoc.refcnt, 1);
 6324                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
 6325                                     dst, stcb);
 6326                                 atomic_add_int(&stcb->asoc.refcnt, -1);
 6327                                 if (stcb_tmp == NULL &&
 6328                                     (inp == stcb->sctp_ep || inp == NULL)) {
 6329                                         /*
 6330                                          * we must validate the state again
 6331                                          * here
 6332                                          */
 6333                         add_it_now6:
 6334                                         if (stcb->asoc.state == 0) {
 6335                                                 /* the assoc was freed? */
 6336                                                 return (-16);
 6337                                         }
 6338                                         /*
 6339                                          * we must add the address, no scope
 6340                                          * set
 6341                                          */
 6342                                         if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) {
 6343                                                 return (-17);
 6344                                         }
 6345                                 } else if (stcb_tmp == stcb) {
 6346                                         /*
 6347                                          * we must validate the state again
 6348                                          * here
 6349                                          */
 6350                                         if (stcb->asoc.state == 0) {
 6351                                                 /* the assoc was freed? */
 6352                                                 return (-19);
 6353                                         }
 6354                                         if (net != NULL) {
 6355                                                 /* clear flag */
 6356                                                 net->dest_state &=
 6357                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
 6358                                         }
 6359                                 } else {
 6360                                         /*
 6361                                          * strange, address is in another
 6362                                          * assoc? straighten out locks.
 6363                                          */
 6364                                         if (stcb_tmp) {
 6365                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
 6366                                                         struct mbuf *op_err;
 6367                                                         char msg[SCTP_DIAG_INFO_LEN];
 6368 
 6369                                                         /*
 6370                                                          * in setup state we
 6371                                                          * abort this guy
 6372                                                          */
 6373                                                         snprintf(msg, sizeof(msg),
 6374                                                             "%s:%d at %s", __FILE__, __LINE__, __func__);
 6375                                                         op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
 6376                                                             msg);
 6377                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
 6378                                                             stcb_tmp, op_err,
 6379                                                             SCTP_SO_NOT_LOCKED);
 6380                                                         goto add_it_now6;
 6381                                                 }
 6382                                                 SCTP_TCB_UNLOCK(stcb_tmp);
 6383                                         }
 6384                                         if (stcb->asoc.state == 0) {
 6385                                                 /* the assoc was freed? */
 6386                                                 return (-21);
 6387                                         }
 6388                                         return (-22);
 6389                                 }
 6390                         }
 6391                 } else
 6392 #endif
 6393                 if (ptype == SCTP_ECN_CAPABLE) {
 6394                         peer_supports_ecn = 1;
 6395                 } else if (ptype == SCTP_ULP_ADAPTATION) {
 6396                         if (stcb->asoc.state != SCTP_STATE_OPEN) {
 6397                                 struct sctp_adaptation_layer_indication ai,
 6398                                                                 *aip;
 6399 
 6400                                 phdr = sctp_get_next_param(m, offset,
 6401                                     (struct sctp_paramhdr *)&ai, sizeof(ai));
 6402                                 aip = (struct sctp_adaptation_layer_indication *)phdr;
 6403                                 if (aip) {
 6404                                         stcb->asoc.peers_adaptation = ntohl(aip->indication);
 6405                                         stcb->asoc.adaptation_needed = 1;
 6406                                 }
 6407                         }
 6408                 } else if (ptype == SCTP_SET_PRIM_ADDR) {
 6409                         struct sctp_asconf_addr_param lstore, *fee;
 6410                         int lptype;
 6411                         struct sockaddr *lsa = NULL;
 6412 
 6413 #ifdef INET
 6414                         struct sctp_asconf_addrv4_param *fii;
 6415 
 6416 #endif
 6417 
 6418                         if (stcb->asoc.asconf_supported == 0) {
 6419                                 return (-100);
 6420                         }
 6421                         if (plen > sizeof(lstore)) {
 6422                                 return (-23);
 6423                         }
 6424                         phdr = sctp_get_next_param(m, offset,
 6425                             (struct sctp_paramhdr *)&lstore,
 6426                             min(plen, sizeof(lstore)));
 6427                         if (phdr == NULL) {
 6428                                 return (-24);
 6429                         }
 6430                         fee = (struct sctp_asconf_addr_param *)phdr;
 6431                         lptype = ntohs(fee->addrp.ph.param_type);
 6432                         switch (lptype) {
 6433 #ifdef INET
 6434                         case SCTP_IPV4_ADDRESS:
 6435                                 if (plen !=
 6436                                     sizeof(struct sctp_asconf_addrv4_param)) {
 6437                                         SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n",
 6438                                             (int)sizeof(struct sctp_asconf_addrv4_param),
 6439                                             plen);
 6440                                 } else {
 6441                                         fii = (struct sctp_asconf_addrv4_param *)fee;
 6442                                         sin.sin_addr.s_addr = fii->addrp.addr;
 6443                                         lsa = (struct sockaddr *)&sin;
 6444                                 }
 6445                                 break;
 6446 #endif
 6447 #ifdef INET6
 6448                         case SCTP_IPV6_ADDRESS:
 6449                                 if (plen !=
 6450                                     sizeof(struct sctp_asconf_addr_param)) {
 6451                                         SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
 6452                                             (int)sizeof(struct sctp_asconf_addr_param),
 6453                                             plen);
 6454                                 } else {
 6455                                         memcpy(sin6.sin6_addr.s6_addr,
 6456                                             fee->addrp.addr,
 6457                                             sizeof(fee->addrp.addr));
 6458                                         lsa = (struct sockaddr *)&sin6;
 6459                                 }
 6460                                 break;
 6461 #endif
 6462                         default:
 6463                                 break;
 6464                         }
 6465                         if (lsa) {
 6466                                 (void)sctp_set_primary_addr(stcb, sa, NULL);
 6467                         }
 6468                 } else if (ptype == SCTP_HAS_NAT_SUPPORT) {
 6469                         stcb->asoc.peer_supports_nat = 1;
 6470                 } else if (ptype == SCTP_PRSCTP_SUPPORTED) {
 6471                         /* Peer supports pr-sctp */
 6472                         peer_supports_prsctp = 1;
 6473                 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
 6474                         /* A supported extension chunk */
 6475                         struct sctp_supported_chunk_types_param *pr_supported;
 6476                         uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
 6477                         int num_ent, i;
 6478 
 6479                         phdr = sctp_get_next_param(m, offset,
 6480                             (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen));
 6481                         if (phdr == NULL) {
 6482                                 return (-25);
 6483                         }
 6484                         pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
 6485                         num_ent = plen - sizeof(struct sctp_paramhdr);
 6486                         for (i = 0; i < num_ent; i++) {
 6487                                 switch (pr_supported->chunk_types[i]) {
 6488                                 case SCTP_ASCONF:
 6489                                         peer_supports_asconf = 1;
 6490                                         break;
 6491                                 case SCTP_ASCONF_ACK:
 6492                                         peer_supports_asconf_ack = 1;
 6493                                         break;
 6494                                 case SCTP_FORWARD_CUM_TSN:
 6495                                         peer_supports_prsctp = 1;
 6496                                         break;
 6497                                 case SCTP_PACKET_DROPPED:
 6498                                         peer_supports_pktdrop = 1;
 6499                                         break;
 6500                                 case SCTP_NR_SELECTIVE_ACK:
 6501                                         peer_supports_nrsack = 1;
 6502                                         break;
 6503                                 case SCTP_STREAM_RESET:
 6504                                         peer_supports_reconfig = 1;
 6505                                         break;
 6506                                 case SCTP_AUTHENTICATION:
 6507                                         peer_supports_auth = 1;
 6508                                         break;
 6509                                 case SCTP_IDATA:
 6510                                         peer_supports_idata = 1;
 6511                                         break;
 6512                                 default:
 6513                                         /* one I have not learned yet */
 6514                                         break;
 6515 
 6516                                 }
 6517                         }
 6518                 } else if (ptype == SCTP_RANDOM) {
 6519                         if (plen > sizeof(random_store))
 6520                                 break;
 6521                         if (got_random) {
 6522                                 /* already processed a RANDOM */
 6523                                 goto next_param;
 6524                         }
 6525                         phdr = sctp_get_next_param(m, offset,
 6526                             (struct sctp_paramhdr *)random_store,
 6527                             min(sizeof(random_store), plen));
 6528                         if (phdr == NULL)
 6529                                 return (-26);
 6530                         p_random = (struct sctp_auth_random *)phdr;
 6531                         random_len = plen - sizeof(*p_random);
 6532                         /* enforce the random length */
 6533                         if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) {
 6534                                 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n");
 6535                                 return (-27);
 6536                         }
 6537                         got_random = 1;
 6538                 } else if (ptype == SCTP_HMAC_LIST) {
 6539                         uint16_t num_hmacs;
 6540                         uint16_t i;
 6541 
 6542                         if (plen > sizeof(hmacs_store))
 6543                                 break;
 6544                         if (got_hmacs) {
 6545                                 /* already processed a HMAC list */
 6546                                 goto next_param;
 6547                         }
 6548                         phdr = sctp_get_next_param(m, offset,
 6549                             (struct sctp_paramhdr *)hmacs_store,
 6550                             min(plen, sizeof(hmacs_store)));
 6551                         if (phdr == NULL)
 6552                                 return (-28);
 6553                         hmacs = (struct sctp_auth_hmac_algo *)phdr;
 6554                         hmacs_len = plen - sizeof(*hmacs);
 6555                         num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
 6556                         /* validate the hmac list */
 6557                         if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
 6558                                 return (-29);
 6559                         }
 6560                         if (stcb->asoc.peer_hmacs != NULL)
 6561                                 sctp_free_hmaclist(stcb->asoc.peer_hmacs);
 6562                         stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs);
 6563                         if (stcb->asoc.peer_hmacs != NULL) {
 6564                                 for (i = 0; i < num_hmacs; i++) {
 6565                                         (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs,
 6566                                             ntohs(hmacs->hmac_ids[i]));
 6567                                 }
 6568                         }
 6569                         got_hmacs = 1;
 6570                 } else if (ptype == SCTP_CHUNK_LIST) {
 6571                         int i;
 6572 
 6573                         if (plen > sizeof(chunks_store))
 6574                                 break;
 6575                         if (got_chklist) {
 6576                                 /* already processed a Chunks list */
 6577                                 goto next_param;
 6578                         }
 6579                         phdr = sctp_get_next_param(m, offset,
 6580                             (struct sctp_paramhdr *)chunks_store,
 6581                             min(plen, sizeof(chunks_store)));
 6582                         if (phdr == NULL)
 6583                                 return (-30);
 6584                         chunks = (struct sctp_auth_chunk_list *)phdr;
 6585                         num_chunks = plen - sizeof(*chunks);
 6586                         if (stcb->asoc.peer_auth_chunks != NULL)
 6587                                 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks);
 6588                         else
 6589                                 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist();
 6590                         for (i = 0; i < num_chunks; i++) {
 6591                                 (void)sctp_auth_add_chunk(chunks->chunk_types[i],
 6592                                     stcb->asoc.peer_auth_chunks);
 6593                                 /* record asconf/asconf-ack if listed */
 6594                                 if (chunks->chunk_types[i] == SCTP_ASCONF)
 6595                                         saw_asconf = 1;
 6596                                 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK)
 6597                                         saw_asconf_ack = 1;
 6598 
 6599                         }
 6600                         got_chklist = 1;
 6601                 } else if ((ptype == SCTP_HEARTBEAT_INFO) ||
 6602                             (ptype == SCTP_STATE_COOKIE) ||
 6603                             (ptype == SCTP_UNRECOG_PARAM) ||
 6604                             (ptype == SCTP_COOKIE_PRESERVE) ||
 6605                             (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
 6606                             (ptype == SCTP_ADD_IP_ADDRESS) ||
 6607                             (ptype == SCTP_DEL_IP_ADDRESS) ||
 6608                             (ptype == SCTP_ERROR_CAUSE_IND) ||
 6609                     (ptype == SCTP_SUCCESS_REPORT)) {
 6610                          /* don't care */ ;
 6611                 } else {
 6612                         if ((ptype & 0x8000) == 0x0000) {
 6613                                 /*
 6614                                  * must stop processing the rest of the
 6615                                  * param's. Any report bits were handled
 6616                                  * with the call to
 6617                                  * sctp_arethere_unrecognized_parameters()
 6618                                  * when the INIT or INIT-ACK was first seen.
 6619                                  */
 6620                                 break;
 6621                         }
 6622                 }
 6623 
 6624 next_param:
 6625                 offset += SCTP_SIZE32(plen);
 6626                 if (offset >= limit) {
 6627                         break;
 6628                 }
 6629                 phdr = sctp_get_next_param(m, offset, &parm_buf,
 6630                     sizeof(parm_buf));
 6631         }
 6632         /* Now check to see if we need to purge any addresses */
 6633         TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) {
 6634                 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
 6635                     SCTP_ADDR_NOT_IN_ASSOC) {
 6636                         /* This address has been removed from the asoc */
 6637                         /* remove and free it */
 6638                         stcb->asoc.numnets--;
 6639                         TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
 6640                         sctp_free_remote_addr(net);
 6641                         if (net == stcb->asoc.primary_destination) {
 6642                                 stcb->asoc.primary_destination = NULL;
 6643                                 sctp_select_primary_destination(stcb);
 6644                         }
 6645                 }
 6646         }
 6647         if ((stcb->asoc.ecn_supported == 1) &&
 6648             (peer_supports_ecn == 0)) {
 6649                 stcb->asoc.ecn_supported = 0;
 6650         }
 6651         if ((stcb->asoc.prsctp_supported == 1) &&
 6652             (peer_supports_prsctp == 0)) {
 6653                 stcb->asoc.prsctp_supported = 0;
 6654         }
 6655         if ((stcb->asoc.auth_supported == 1) &&
 6656             ((peer_supports_auth == 0) ||
 6657             (got_random == 0) || (got_hmacs == 0))) {
 6658                 stcb->asoc.auth_supported = 0;
 6659         }
 6660         if ((stcb->asoc.asconf_supported == 1) &&
 6661             ((peer_supports_asconf == 0) || (peer_supports_asconf_ack == 0) ||
 6662             (stcb->asoc.auth_supported == 0) ||
 6663             (saw_asconf == 0) || (saw_asconf_ack == 0))) {
 6664                 stcb->asoc.asconf_supported = 0;
 6665         }
 6666         if ((stcb->asoc.reconfig_supported == 1) &&
 6667             (peer_supports_reconfig == 0)) {
 6668                 stcb->asoc.reconfig_supported = 0;
 6669         }
 6670         if ((stcb->asoc.idata_supported == 1) &&
 6671             (peer_supports_idata == 0)) {
 6672                 stcb->asoc.idata_supported = 0;
 6673         }
 6674         if ((stcb->asoc.nrsack_supported == 1) &&
 6675             (peer_supports_nrsack == 0)) {
 6676                 stcb->asoc.nrsack_supported = 0;
 6677         }
 6678         if ((stcb->asoc.pktdrop_supported == 1) &&
 6679             (peer_supports_pktdrop == 0)) {
 6680                 stcb->asoc.pktdrop_supported = 0;
 6681         }
 6682         /* validate authentication required parameters */
 6683         if ((peer_supports_auth == 0) && (got_chklist == 1)) {
 6684                 /* peer does not support auth but sent a chunks list? */
 6685                 return (-31);
 6686         }
 6687         if ((peer_supports_asconf == 1) && (peer_supports_auth == 0)) {
 6688                 /* peer supports asconf but not auth? */
 6689                 return (-32);
 6690         } else if ((peer_supports_asconf == 1) &&
 6691                     (peer_supports_auth == 1) &&
 6692             ((saw_asconf == 0) || (saw_asconf_ack == 0))) {
 6693                 return (-33);
 6694         }
 6695         /* concatenate the full random key */
 6696         keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len;
 6697         if (chunks != NULL) {
 6698                 keylen += sizeof(*chunks) + num_chunks;
 6699         }
 6700         new_key = sctp_alloc_key(keylen);
 6701         if (new_key != NULL) {
 6702                 /* copy in the RANDOM */
 6703                 if (p_random != NULL) {
 6704                         keylen = sizeof(*p_random) + random_len;
 6705                         bcopy(p_random, new_key->key, keylen);
 6706                 }
 6707                 /* append in the AUTH chunks */
 6708                 if (chunks != NULL) {
 6709                         bcopy(chunks, new_key->key + keylen,
 6710                             sizeof(*chunks) + num_chunks);
 6711                         keylen += sizeof(*chunks) + num_chunks;
 6712                 }
 6713                 /* append in the HMACs */
 6714                 if (hmacs != NULL) {
 6715                         bcopy(hmacs, new_key->key + keylen,
 6716                             sizeof(*hmacs) + hmacs_len);
 6717                 }
 6718         } else {
 6719                 /* failed to get memory for the key */
 6720                 return (-34);
 6721         }
 6722         if (stcb->asoc.authinfo.peer_random != NULL)
 6723                 sctp_free_key(stcb->asoc.authinfo.peer_random);
 6724         stcb->asoc.authinfo.peer_random = new_key;
 6725         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
 6726         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
 6727 
 6728         return (0);
 6729 }
 6730 
 6731 int
 6732 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
 6733     struct sctp_nets *net)
 6734 {
 6735         /* make sure the requested primary address exists in the assoc */
 6736         if (net == NULL && sa)
 6737                 net = sctp_findnet(stcb, sa);
 6738 
 6739         if (net == NULL) {
 6740                 /* didn't find the requested primary address! */
 6741                 return (-1);
 6742         } else {
 6743                 /* set the primary address */
 6744                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
 6745                         /* Must be confirmed, so queue to set */
 6746                         net->dest_state |= SCTP_ADDR_REQ_PRIMARY;
 6747                         return (0);
 6748                 }
 6749                 stcb->asoc.primary_destination = net;
 6750                 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) {
 6751                         sctp_free_remote_addr(stcb->asoc.alternate);
 6752                         stcb->asoc.alternate = NULL;
 6753                 }
 6754                 net = TAILQ_FIRST(&stcb->asoc.nets);
 6755                 if (net != stcb->asoc.primary_destination) {
 6756                         /*
 6757                          * first one on the list is NOT the primary
 6758                          * sctp_cmpaddr() is much more efficient if the
 6759                          * primary is the first on the list, make it so.
 6760                          */
 6761                         TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
 6762                         TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
 6763                 }
 6764                 return (0);
 6765         }
 6766 }
 6767 
 6768 int
 6769 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now)
 6770 {
 6771         /*
 6772          * This function serves two purposes. It will see if a TAG can be
 6773          * re-used and return 1 for yes it is ok and 0 for don't use that
 6774          * tag. A secondary function it will do is purge out old tags that
 6775          * can be removed.
 6776          */
 6777         struct sctpvtaghead *chain;
 6778         struct sctp_tagblock *twait_block;
 6779         struct sctpasochead *head;
 6780         struct sctp_tcb *stcb;
 6781         int i;
 6782 
 6783         SCTP_INP_INFO_RLOCK();
 6784         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
 6785             SCTP_BASE_INFO(hashasocmark))];
 6786         LIST_FOREACH(stcb, head, sctp_asocs) {
 6787                 /*
 6788                  * We choose not to lock anything here. TCB's can't be
 6789                  * removed since we have the read lock, so they can't be
 6790                  * freed on us, same thing for the INP. I may be wrong with
 6791                  * this assumption, but we will go with it for now :-)
 6792                  */
 6793                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
 6794                         continue;
 6795                 }
 6796                 if (stcb->asoc.my_vtag == tag) {
 6797                         /* candidate */
 6798                         if (stcb->rport != rport) {
 6799                                 continue;
 6800                         }
 6801                         if (stcb->sctp_ep->sctp_lport != lport) {
 6802                                 continue;
 6803                         }
 6804                         /* Its a used tag set */
 6805                         SCTP_INP_INFO_RUNLOCK();
 6806                         return (0);
 6807                 }
 6808         }
 6809         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
 6810         /* Now what about timed wait ? */
 6811         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
 6812                 /*
 6813                  * Block(s) are present, lets see if we have this tag in the
 6814                  * list
 6815                  */
 6816                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
 6817                         if (twait_block->vtag_block[i].v_tag == 0) {
 6818                                 /* not used */
 6819                                 continue;
 6820                         } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire <
 6821                             now->tv_sec) {
 6822                                 /* Audit expires this guy */
 6823                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
 6824                                 twait_block->vtag_block[i].v_tag = 0;
 6825                                 twait_block->vtag_block[i].lport = 0;
 6826                                 twait_block->vtag_block[i].rport = 0;
 6827                         } else if ((twait_block->vtag_block[i].v_tag == tag) &&
 6828                                     (twait_block->vtag_block[i].lport == lport) &&
 6829                             (twait_block->vtag_block[i].rport == rport)) {
 6830                                 /* Bad tag, sorry :< */
 6831                                 SCTP_INP_INFO_RUNLOCK();
 6832                                 return (0);
 6833                         }
 6834                 }
 6835         }
 6836         SCTP_INP_INFO_RUNLOCK();
 6837         return (1);
 6838 }
 6839 
 6840 static void
 6841 sctp_drain_mbufs(struct sctp_tcb *stcb)
 6842 {
 6843         /*
 6844          * We must hunt this association for MBUF's past the cumack (i.e.
 6845          * out of order data that we can renege on).
 6846          */
 6847         struct sctp_association *asoc;
 6848         struct sctp_tmit_chunk *chk, *nchk;
 6849         uint32_t cumulative_tsn_p1;
 6850         struct sctp_queued_to_read *ctl, *nctl;
 6851         int cnt, strmat;
 6852         uint32_t gap, i;
 6853         int fnd = 0;
 6854 
 6855         /* We look for anything larger than the cum-ack + 1 */
 6856 
 6857         asoc = &stcb->asoc;
 6858         if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) {
 6859                 /* none we can reneg on. */
 6860                 return;
 6861         }
 6862         SCTP_STAT_INCR(sctps_protocol_drains_done);
 6863         cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
 6864         cnt = 0;
 6865         /* Ok that was fun, now we will drain all the inbound streams? */
 6866         for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
 6867                 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].inqueue, next_instrm, nctl) {
 6868 #ifdef INVARIANTS
 6869                         if (ctl->on_strm_q != SCTP_ON_ORDERED) {
 6870                                 panic("Huh control: %p on_q: %d -- not ordered?",
 6871                                     ctl, ctl->on_strm_q);
 6872                         }
 6873 #endif
 6874                         if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) {
 6875                                 /* Yep it is above cum-ack */
 6876                                 cnt++;
 6877                                 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn);
 6878                                 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length);
 6879                                 sctp_ucount_decr(asoc->cnt_on_all_streams);
 6880                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
 6881                                 if (ctl->on_read_q) {
 6882                                         TAILQ_REMOVE(&stcb->sctp_ep->read_queue, ctl, next);
 6883                                         ctl->on_read_q = 0;
 6884                                 }
 6885                                 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, ctl, next_instrm);
 6886                                 ctl->on_strm_q = 0;
 6887                                 if (ctl->data) {
 6888                                         sctp_m_freem(ctl->data);
 6889                                         ctl->data = NULL;
 6890                                 }
 6891                                 sctp_free_remote_addr(ctl->whoFrom);
 6892                                 /* Now its reasm? */
 6893                                 TAILQ_FOREACH_SAFE(chk, &ctl->reasm, sctp_next, nchk) {
 6894                                         cnt++;
 6895                                         SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.TSN_seq, asoc->mapping_array_base_tsn);
 6896                                         asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size);
 6897                                         sctp_ucount_decr(asoc->cnt_on_reasm_queue);
 6898                                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
 6899                                         TAILQ_REMOVE(&ctl->reasm, chk, sctp_next);
 6900                                         if (chk->data) {
 6901                                                 sctp_m_freem(chk->data);
 6902                                                 chk->data = NULL;
 6903                                         }
 6904                                         sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
 6905                                 }
 6906                                 sctp_free_a_readq(stcb, ctl);
 6907                         }
 6908                 }
 6909                 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].uno_inqueue, next_instrm, nctl) {
 6910 #ifdef INVARIANTS
 6911                         if (ctl->on_strm_q != SCTP_ON_UNORDERED) {
 6912                                 panic("Huh control: %p on_q: %d -- not unordered?",
 6913                                     ctl, ctl->on_strm_q);
 6914                         }
 6915 #endif
 6916                         if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) {
 6917                                 /* Yep it is above cum-ack */
 6918                                 cnt++;
 6919                                 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn);
 6920                                 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length);
 6921                                 sctp_ucount_decr(asoc->cnt_on_all_streams);
 6922                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
 6923                                 if (ctl->on_read_q) {
 6924                                         TAILQ_REMOVE(&stcb->sctp_ep->read_queue, ctl, next);
 6925                                         ctl->on_read_q = 0;
 6926                                 }
 6927                                 TAILQ_REMOVE(&asoc->strmin[strmat].uno_inqueue, ctl, next_instrm);
 6928                                 ctl->on_strm_q = 0;
 6929                                 if (ctl->data) {
 6930                                         sctp_m_freem(ctl->data);
 6931                                         ctl->data = NULL;
 6932                                 }
 6933                                 sctp_free_remote_addr(ctl->whoFrom);
 6934                                 /* Now its reasm? */
 6935                                 TAILQ_FOREACH_SAFE(chk, &ctl->reasm, sctp_next, nchk) {
 6936                                         cnt++;
 6937                                         SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.TSN_seq, asoc->mapping_array_base_tsn);
 6938                                         asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size);
 6939                                         sctp_ucount_decr(asoc->cnt_on_reasm_queue);
 6940                                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
 6941                                         TAILQ_REMOVE(&ctl->reasm, chk, sctp_next);
 6942                                         if (chk->data) {
 6943                                                 sctp_m_freem(chk->data);
 6944                                                 chk->data = NULL;
 6945                                         }
 6946                                         sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
 6947                                 }
 6948                                 sctp_free_a_readq(stcb, ctl);
 6949                         }
 6950                 }
 6951         }
 6952         if (cnt) {
 6953                 /* We must back down to see what the new highest is */
 6954                 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) {
 6955                         SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn);
 6956                         if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) {
 6957                                 asoc->highest_tsn_inside_map = i;
 6958                                 fnd = 1;
 6959                                 break;
 6960                         }
 6961                 }
 6962                 if (!fnd) {
 6963                         asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1;
 6964                 }
 6965                 /*
 6966                  * Question, should we go through the delivery queue? The
 6967                  * only reason things are on here is the app not reading OR
 6968                  * a p-d-api up. An attacker COULD send enough in to
 6969                  * initiate the PD-API and then send a bunch of stuff to
 6970                  * other streams... these would wind up on the delivery
 6971                  * queue.. and then we would not get to them. But in order
 6972                  * to do this I then have to back-track and un-deliver
 6973                  * sequence numbers in streams.. el-yucko. I think for now
 6974                  * we will NOT look at the delivery queue and leave it to be
 6975                  * something to consider later. An alternative would be to
 6976                  * abort the P-D-API with a notification and then deliver
 6977                  * the data.... Or another method might be to keep track of
 6978                  * how many times the situation occurs and if we see a
 6979                  * possible attack underway just abort the association.
 6980                  */
 6981 #ifdef SCTP_DEBUG
 6982                 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt);
 6983 #endif
 6984                 /*
 6985                  * Now do we need to find a new
 6986                  * asoc->highest_tsn_inside_map?
 6987                  */
 6988                 asoc->last_revoke_count = cnt;
 6989                 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
 6990                 /* sa_ignore NO_NULL_CHK */
 6991                 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED);
 6992                 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED);
 6993         }
 6994         /*
 6995          * Another issue, in un-setting the TSN's in the mapping array we
 6996          * DID NOT adjust the highest_tsn marker.  This will cause one of
 6997          * two things to occur. It may cause us to do extra work in checking
 6998          * for our mapping array movement. More importantly it may cause us
 6999          * to SACK every datagram. This may not be a bad thing though since
 7000          * we will recover once we get our cum-ack above and all this stuff
 7001          * we dumped recovered.
 7002          */
 7003 }
 7004 
 7005 void
 7006 sctp_drain()
 7007 {
 7008         /*
 7009          * We must walk the PCB lists for ALL associations here. The system
 7010          * is LOW on MBUF's and needs help. This is where reneging will
 7011          * occur. We really hope this does NOT happen!
 7012          */
 7013         VNET_ITERATOR_DECL(vnet_iter);
 7014         VNET_LIST_RLOCK_NOSLEEP();
 7015         VNET_FOREACH(vnet_iter) {
 7016                 CURVNET_SET(vnet_iter);
 7017                 struct sctp_inpcb *inp;
 7018                 struct sctp_tcb *stcb;
 7019 
 7020                 SCTP_STAT_INCR(sctps_protocol_drain_calls);
 7021                 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) {
 7022 #ifdef VIMAGE
 7023                         continue;
 7024 #else
 7025                         return;
 7026 #endif
 7027                 }
 7028                 SCTP_INP_INFO_RLOCK();
 7029                 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) {
 7030                         /* For each endpoint */
 7031                         SCTP_INP_RLOCK(inp);
 7032                         LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
 7033                                 /* For each association */
 7034                                 SCTP_TCB_LOCK(stcb);
 7035                                 sctp_drain_mbufs(stcb);
 7036                                 SCTP_TCB_UNLOCK(stcb);
 7037                         }
 7038                         SCTP_INP_RUNLOCK(inp);
 7039                 }
 7040                 SCTP_INP_INFO_RUNLOCK();
 7041                 CURVNET_RESTORE();
 7042         }
 7043         VNET_LIST_RUNLOCK_NOSLEEP();
 7044 }
 7045 
 7046 /*
 7047  * start a new iterator
 7048  * iterates through all endpoints and associations based on the pcb_state
 7049  * flags and asoc_state.  "af" (mandatory) is executed for all matching
 7050  * assocs and "ef" (optional) is executed when the iterator completes.
 7051  * "inpf" (optional) is executed for each new endpoint as it is being
 7052  * iterated through. inpe (optional) is called when the inp completes
 7053  * its way through all the stcbs.
 7054  */
 7055 int
 7056 sctp_initiate_iterator(inp_func inpf,
 7057     asoc_func af,
 7058     inp_func inpe,
 7059     uint32_t pcb_state,
 7060     uint32_t pcb_features,
 7061     uint32_t asoc_state,
 7062     void *argp,
 7063     uint32_t argi,
 7064     end_func ef,
 7065     struct sctp_inpcb *s_inp,
 7066     uint8_t chunk_output_off)
 7067 {
 7068         struct sctp_iterator *it = NULL;
 7069 
 7070         if (af == NULL) {
 7071                 return (-1);
 7072         }
 7073         if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
 7074                 SCTP_PRINTF("%s: abort on initialize being %d\n", __func__,
 7075                     SCTP_BASE_VAR(sctp_pcb_initialized));
 7076                 return (-1);
 7077         }
 7078         SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator),
 7079             SCTP_M_ITER);
 7080         if (it == NULL) {
 7081                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
 7082                 return (ENOMEM);
 7083         }
 7084         memset(it, 0, sizeof(*it));
 7085         it->function_assoc = af;
 7086         it->function_inp = inpf;
 7087         if (inpf)
 7088                 it->done_current_ep = 0;
 7089         else
 7090                 it->done_current_ep = 1;
 7091         it->function_atend = ef;
 7092         it->pointer = argp;
 7093         it->val = argi;
 7094         it->pcb_flags = pcb_state;
 7095         it->pcb_features = pcb_features;
 7096         it->asoc_state = asoc_state;
 7097         it->function_inp_end = inpe;
 7098         it->no_chunk_output = chunk_output_off;
 7099         it->vn = curvnet;
 7100         if (s_inp) {
 7101                 /* Assume lock is held here */
 7102                 it->inp = s_inp;
 7103                 SCTP_INP_INCR_REF(it->inp);
 7104                 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
 7105         } else {
 7106                 SCTP_INP_INFO_RLOCK();
 7107                 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead));
 7108                 if (it->inp) {
 7109                         SCTP_INP_INCR_REF(it->inp);
 7110                 }
 7111                 SCTP_INP_INFO_RUNLOCK();
 7112                 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
 7113 
 7114         }
 7115         SCTP_IPI_ITERATOR_WQ_LOCK();
 7116         if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
 7117                 SCTP_IPI_ITERATOR_WQ_UNLOCK();
 7118                 SCTP_PRINTF("%s: rollback on initialize being %d it=%p\n", __func__,
 7119                     SCTP_BASE_VAR(sctp_pcb_initialized), it);
 7120                 SCTP_FREE(it, SCTP_M_ITER);
 7121                 return (-1);
 7122         }
 7123         TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
 7124         if (sctp_it_ctl.iterator_running == 0) {
 7125                 sctp_wakeup_iterator();
 7126         }
 7127         SCTP_IPI_ITERATOR_WQ_UNLOCK();
 7128         /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */
 7129         return (0);
 7130 }

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