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("$FreeBSD$");
   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 #include <netinet/udp.h>
   50 #ifdef INET6
   51 #include <netinet6/ip6_var.h>
   52 #endif
   53 #include <sys/sched.h>
   54 #include <sys/smp.h>
   55 #include <sys/unistd.h>
   56 
   57 
   58 VNET_DEFINE(struct sctp_base_info, system_base_info);
   59 
   60 /* FIX: we don't handle multiple link local scopes */
   61 /* "scopeless" replacement IN6_ARE_ADDR_EQUAL */
   62 #ifdef INET6
   63 int
   64 SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 *a, struct sockaddr_in6 *b)
   65 {
   66         struct sockaddr_in6 tmp_a, tmp_b;
   67 
   68         memcpy(&tmp_a, a, sizeof(struct sockaddr_in6));
   69         if (sa6_embedscope(&tmp_a, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
   70                 return (0);
   71         }
   72         memcpy(&tmp_b, b, sizeof(struct sockaddr_in6));
   73         if (sa6_embedscope(&tmp_b, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
   74                 return (0);
   75         }
   76         return (IN6_ARE_ADDR_EQUAL(&tmp_a.sin6_addr, &tmp_b.sin6_addr));
   77 }
   78 
   79 #endif
   80 
   81 void
   82 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb)
   83 {
   84         /*
   85          * We really don't need to lock this, but I will just because it
   86          * does not hurt.
   87          */
   88         SCTP_INP_INFO_RLOCK();
   89         spcb->ep_count = SCTP_BASE_INFO(ipi_count_ep);
   90         spcb->asoc_count = SCTP_BASE_INFO(ipi_count_asoc);
   91         spcb->laddr_count = SCTP_BASE_INFO(ipi_count_laddr);
   92         spcb->raddr_count = SCTP_BASE_INFO(ipi_count_raddr);
   93         spcb->chk_count = SCTP_BASE_INFO(ipi_count_chunk);
   94         spcb->readq_count = SCTP_BASE_INFO(ipi_count_readq);
   95         spcb->stream_oque = SCTP_BASE_INFO(ipi_count_strmoq);
   96         spcb->free_chunks = SCTP_BASE_INFO(ipi_free_chunks);
   97         SCTP_INP_INFO_RUNLOCK();
   98 }
   99 
  100 /*-
  101  * Addresses are added to VRF's (Virtual Router's). For BSD we
  102  * have only the default VRF 0. We maintain a hash list of
  103  * VRF's. Each VRF has its own list of sctp_ifn's. Each of
  104  * these has a list of addresses. When we add a new address
  105  * to a VRF we lookup the ifn/ifn_index, if the ifn does
  106  * not exist we create it and add it to the list of IFN's
  107  * within the VRF. Once we have the sctp_ifn, we add the
  108  * address to the list. So we look something like:
  109  *
  110  * hash-vrf-table
  111  *   vrf-> ifn-> ifn -> ifn
  112  *   vrf    |
  113  *    ...   +--ifa-> ifa -> ifa
  114  *   vrf
  115  *
  116  * We keep these separate lists since the SCTP subsystem will
  117  * point to these from its source address selection nets structure.
  118  * When an address is deleted it does not happen right away on
  119  * the SCTP side, it gets scheduled. What we do when a
  120  * delete happens is immediately remove the address from
  121  * the master list and decrement the refcount. As our
  122  * addip iterator works through and frees the src address
  123  * selection pointing to the sctp_ifa, eventually the refcount
  124  * will reach 0 and we will delete it. Note that it is assumed
  125  * that any locking on system level ifn/ifa is done at the
  126  * caller of these functions and these routines will only
  127  * lock the SCTP structures as they add or delete things.
  128  *
  129  * Other notes on VRF concepts.
  130  *  - An endpoint can be in multiple VRF's
  131  *  - An association lives within a VRF and only one VRF.
  132  *  - Any incoming packet we can deduce the VRF for by
  133  *    looking at the mbuf/pak inbound (for BSD its VRF=0 :D)
  134  *  - Any downward send call or connect call must supply the
  135  *    VRF via ancillary data or via some sort of set default
  136  *    VRF socket option call (again for BSD no brainer since
  137  *    the VRF is always 0).
  138  *  - An endpoint may add multiple VRF's to it.
  139  *  - Listening sockets can accept associations in any
  140  *    of the VRF's they are in but the assoc will end up
  141  *    in only one VRF (gotten from the packet or connect/send).
  142  *
  143  */
  144 
  145 struct sctp_vrf *
  146 sctp_allocate_vrf(int vrf_id)
  147 {
  148         struct sctp_vrf *vrf = NULL;
  149         struct sctp_vrflist *bucket;
  150 
  151         /* First allocate the VRF structure */
  152         vrf = sctp_find_vrf(vrf_id);
  153         if (vrf) {
  154                 /* Already allocated */
  155                 return (vrf);
  156         }
  157         SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf),
  158             SCTP_M_VRF);
  159         if (vrf == NULL) {
  160                 /* No memory */
  161 #ifdef INVARIANTS
  162                 panic("No memory for VRF:%d", vrf_id);
  163 #endif
  164                 return (NULL);
  165         }
  166         /* setup the VRF */
  167         memset(vrf, 0, sizeof(struct sctp_vrf));
  168         vrf->vrf_id = vrf_id;
  169         LIST_INIT(&vrf->ifnlist);
  170         vrf->total_ifa_count = 0;
  171         vrf->refcount = 0;
  172         /* now also setup table ids */
  173         SCTP_INIT_VRF_TABLEID(vrf);
  174         /* Init the HASH of addresses */
  175         vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE,
  176             &vrf->vrf_addr_hashmark);
  177         if (vrf->vrf_addr_hash == NULL) {
  178                 /* No memory */
  179 #ifdef INVARIANTS
  180                 panic("No memory for VRF:%d", vrf_id);
  181 #endif
  182                 SCTP_FREE(vrf, SCTP_M_VRF);
  183                 return (NULL);
  184         }
  185         /* Add it to the hash table */
  186         bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
  187         LIST_INSERT_HEAD(bucket, vrf, next_vrf);
  188         atomic_add_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
  189         return (vrf);
  190 }
  191 
  192 
  193 struct sctp_ifn *
  194 sctp_find_ifn(void *ifn, uint32_t ifn_index)
  195 {
  196         struct sctp_ifn *sctp_ifnp;
  197         struct sctp_ifnlist *hash_ifn_head;
  198 
  199         /*
  200          * We assume the lock is held for the addresses if that's wrong
  201          * problems could occur :-)
  202          */
  203         hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
  204         LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) {
  205                 if (sctp_ifnp->ifn_index == ifn_index) {
  206                         return (sctp_ifnp);
  207                 }
  208                 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) {
  209                         return (sctp_ifnp);
  210                 }
  211         }
  212         return (NULL);
  213 }
  214 
  215 
  216 struct sctp_vrf *
  217 sctp_find_vrf(uint32_t vrf_id)
  218 {
  219         struct sctp_vrflist *bucket;
  220         struct sctp_vrf *liste;
  221 
  222         bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
  223         LIST_FOREACH(liste, bucket, next_vrf) {
  224                 if (vrf_id == liste->vrf_id) {
  225                         return (liste);
  226                 }
  227         }
  228         return (NULL);
  229 }
  230 
  231 
  232 void
  233 sctp_free_vrf(struct sctp_vrf *vrf)
  234 {
  235         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) {
  236                 if (vrf->vrf_addr_hash) {
  237                         SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
  238                         vrf->vrf_addr_hash = NULL;
  239                 }
  240                 /* We zero'd the count */
  241                 LIST_REMOVE(vrf, next_vrf);
  242                 SCTP_FREE(vrf, SCTP_M_VRF);
  243                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
  244         }
  245 }
  246 
  247 
  248 void
  249 sctp_free_ifn(struct sctp_ifn *sctp_ifnp)
  250 {
  251         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) {
  252                 /* We zero'd the count */
  253                 if (sctp_ifnp->vrf) {
  254                         sctp_free_vrf(sctp_ifnp->vrf);
  255                 }
  256                 SCTP_FREE(sctp_ifnp, SCTP_M_IFN);
  257                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
  258         }
  259 }
  260 
  261 
  262 void
  263 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu)
  264 {
  265         struct sctp_ifn *sctp_ifnp;
  266 
  267         sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index);
  268         if (sctp_ifnp != NULL) {
  269                 sctp_ifnp->ifn_mtu = mtu;
  270         }
  271 }
  272 
  273 
  274 void
  275 sctp_free_ifa(struct sctp_ifa *sctp_ifap)
  276 {
  277         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) {
  278                 /* We zero'd the count */
  279                 if (sctp_ifap->ifn_p) {
  280                         sctp_free_ifn(sctp_ifap->ifn_p);
  281                 }
  282                 SCTP_FREE(sctp_ifap, SCTP_M_IFA);
  283                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
  284         }
  285 }
  286 
  287 
  288 static void
  289 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock)
  290 {
  291         struct sctp_ifn *found;
  292 
  293         found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index);
  294         if (found == NULL) {
  295                 /* Not in the list.. sorry */
  296                 return;
  297         }
  298         if (hold_addr_lock == 0)
  299                 SCTP_IPI_ADDR_WLOCK();
  300         LIST_REMOVE(sctp_ifnp, next_bucket);
  301         LIST_REMOVE(sctp_ifnp, next_ifn);
  302         SCTP_DEREGISTER_INTERFACE(sctp_ifnp->ifn_index,
  303             sctp_ifnp->registered_af);
  304         if (hold_addr_lock == 0)
  305                 SCTP_IPI_ADDR_WUNLOCK();
  306         /* Take away the reference, and possibly free it */
  307         sctp_free_ifn(sctp_ifnp);
  308 }
  309 
  310 
  311 void
  312 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr,
  313     const char *if_name, uint32_t ifn_index)
  314 {
  315         struct sctp_vrf *vrf;
  316         struct sctp_ifa *sctp_ifap;
  317 
  318         SCTP_IPI_ADDR_RLOCK();
  319         vrf = sctp_find_vrf(vrf_id);
  320         if (vrf == NULL) {
  321                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
  322                 goto out;
  323 
  324         }
  325         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
  326         if (sctp_ifap == NULL) {
  327                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
  328                 goto out;
  329         }
  330         if (sctp_ifap->ifn_p == NULL) {
  331                 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n");
  332                 goto out;
  333         }
  334         if (if_name) {
  335                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) {
  336                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
  337                             sctp_ifap->ifn_p->ifn_name, if_name);
  338                         goto out;
  339                 }
  340         } else {
  341                 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
  342                         SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
  343                             sctp_ifap->ifn_p->ifn_index, ifn_index);
  344                         goto out;
  345                 }
  346         }
  347 
  348         sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID);
  349         sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE;
  350 out:
  351         SCTP_IPI_ADDR_RUNLOCK();
  352 }
  353 
  354 
  355 void
  356 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr,
  357     const char *if_name, uint32_t ifn_index)
  358 {
  359         struct sctp_vrf *vrf;
  360         struct sctp_ifa *sctp_ifap;
  361 
  362         SCTP_IPI_ADDR_RLOCK();
  363         vrf = sctp_find_vrf(vrf_id);
  364         if (vrf == NULL) {
  365                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
  366                 goto out;
  367 
  368         }
  369         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
  370         if (sctp_ifap == NULL) {
  371                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
  372                 goto out;
  373         }
  374         if (sctp_ifap->ifn_p == NULL) {
  375                 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n");
  376                 goto out;
  377         }
  378         if (if_name) {
  379                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) {
  380                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
  381                             sctp_ifap->ifn_p->ifn_name, if_name);
  382                         goto out;
  383                 }
  384         } else {
  385                 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
  386                         SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
  387                             sctp_ifap->ifn_p->ifn_index, ifn_index);
  388                         goto out;
  389                 }
  390         }
  391 
  392         sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE);
  393         sctp_ifap->localifa_flags |= SCTP_ADDR_VALID;
  394 out:
  395         SCTP_IPI_ADDR_RUNLOCK();
  396 }
  397 
  398 
  399 /*-
  400  * Add an ifa to an ifn.
  401  * Register the interface as necessary.
  402  * NOTE: ADDR write lock MUST be held.
  403  */
  404 static void
  405 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap)
  406 {
  407         int ifa_af;
  408 
  409         LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
  410         sctp_ifap->ifn_p = sctp_ifnp;
  411         atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
  412         /* update address counts */
  413         sctp_ifnp->ifa_count++;
  414         ifa_af = sctp_ifap->address.sa.sa_family;
  415         switch (ifa_af) {
  416 #ifdef INET
  417         case AF_INET:
  418                 sctp_ifnp->num_v4++;
  419                 break;
  420 #endif
  421 #ifdef INET6
  422         case AF_INET6:
  423                 sctp_ifnp->num_v6++;
  424                 break;
  425 #endif
  426         default:
  427                 break;
  428         }
  429         if (sctp_ifnp->ifa_count == 1) {
  430                 /* register the new interface */
  431                 SCTP_REGISTER_INTERFACE(sctp_ifnp->ifn_index, ifa_af);
  432                 sctp_ifnp->registered_af = ifa_af;
  433         }
  434 }
  435 
  436 
  437 /*-
  438  * Remove an ifa from its ifn.
  439  * If no more addresses exist, remove the ifn too. Otherwise, re-register
  440  * the interface based on the remaining address families left.
  441  * NOTE: ADDR write lock MUST be held.
  442  */
  443 static void
  444 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap)
  445 {
  446         LIST_REMOVE(sctp_ifap, next_ifa);
  447         if (sctp_ifap->ifn_p) {
  448                 /* update address counts */
  449                 sctp_ifap->ifn_p->ifa_count--;
  450                 switch (sctp_ifap->address.sa.sa_family) {
  451 #ifdef INET
  452                 case AF_INET:
  453                         sctp_ifap->ifn_p->num_v4--;
  454                         break;
  455 #endif
  456 #ifdef INET6
  457                 case AF_INET6:
  458                         sctp_ifap->ifn_p->num_v6--;
  459                         break;
  460 #endif
  461                 default:
  462                         break;
  463                 }
  464 
  465                 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) {
  466                         /* remove the ifn, possibly freeing it */
  467                         sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED);
  468                 } else {
  469                         /* re-register address family type, if needed */
  470                         if ((sctp_ifap->ifn_p->num_v6 == 0) &&
  471                             (sctp_ifap->ifn_p->registered_af == AF_INET6)) {
  472                                 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6);
  473                                 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET);
  474                                 sctp_ifap->ifn_p->registered_af = AF_INET;
  475                         } else if ((sctp_ifap->ifn_p->num_v4 == 0) &&
  476                             (sctp_ifap->ifn_p->registered_af == AF_INET)) {
  477                                 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET);
  478                                 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6);
  479                                 sctp_ifap->ifn_p->registered_af = AF_INET6;
  480                         }
  481                         /* free the ifn refcount */
  482                         sctp_free_ifn(sctp_ifap->ifn_p);
  483                 }
  484                 sctp_ifap->ifn_p = NULL;
  485         }
  486 }
  487 
  488 
  489 struct sctp_ifa *
  490 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index,
  491     uint32_t ifn_type, const char *if_name, void *ifa,
  492     struct sockaddr *addr, uint32_t ifa_flags,
  493     int dynamic_add)
  494 {
  495         struct sctp_vrf *vrf;
  496         struct sctp_ifn *sctp_ifnp = NULL;
  497         struct sctp_ifa *sctp_ifap = NULL;
  498         struct sctp_ifalist *hash_addr_head;
  499         struct sctp_ifnlist *hash_ifn_head;
  500         uint32_t hash_of_addr;
  501         int new_ifn_af = 0;
  502 
  503 #ifdef SCTP_DEBUG
  504         SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id);
  505         SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
  506 #endif
  507         SCTP_IPI_ADDR_WLOCK();
  508         sctp_ifnp = sctp_find_ifn(ifn, ifn_index);
  509         if (sctp_ifnp) {
  510                 vrf = sctp_ifnp->vrf;
  511         } else {
  512                 vrf = sctp_find_vrf(vrf_id);
  513                 if (vrf == NULL) {
  514                         vrf = sctp_allocate_vrf(vrf_id);
  515                         if (vrf == NULL) {
  516                                 SCTP_IPI_ADDR_WUNLOCK();
  517                                 return (NULL);
  518                         }
  519                 }
  520         }
  521         if (sctp_ifnp == NULL) {
  522                 /*
  523                  * build one and add it, can't hold lock until after malloc
  524                  * done though.
  525                  */
  526                 SCTP_IPI_ADDR_WUNLOCK();
  527                 SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *,
  528                     sizeof(struct sctp_ifn), SCTP_M_IFN);
  529                 if (sctp_ifnp == NULL) {
  530 #ifdef INVARIANTS
  531                         panic("No memory for IFN");
  532 #endif
  533                         return (NULL);
  534                 }
  535                 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn));
  536                 sctp_ifnp->ifn_index = ifn_index;
  537                 sctp_ifnp->ifn_p = ifn;
  538                 sctp_ifnp->ifn_type = ifn_type;
  539                 sctp_ifnp->refcount = 0;
  540                 sctp_ifnp->vrf = vrf;
  541                 atomic_add_int(&vrf->refcount, 1);
  542                 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family);
  543                 if (if_name != NULL) {
  544                         snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", if_name);
  545                 } else {
  546                         snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", "unknown");
  547                 }
  548                 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
  549                 LIST_INIT(&sctp_ifnp->ifalist);
  550                 SCTP_IPI_ADDR_WLOCK();
  551                 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket);
  552                 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn);
  553                 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
  554                 new_ifn_af = 1;
  555         }
  556         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
  557         if (sctp_ifap) {
  558                 /* Hmm, it already exists? */
  559                 if ((sctp_ifap->ifn_p) &&
  560                     (sctp_ifap->ifn_p->ifn_index == ifn_index)) {
  561                         SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n",
  562                             sctp_ifap->ifn_p->ifn_name, ifn_index,
  563                             (void *)sctp_ifap);
  564                         if (new_ifn_af) {
  565                                 /* Remove the created one that we don't want */
  566                                 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED);
  567                         }
  568                         if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) {
  569                                 /* easy to solve, just switch back to active */
  570                                 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n");
  571                                 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
  572                                 sctp_ifap->ifn_p = sctp_ifnp;
  573                                 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
  574                         }
  575         exit_stage_left:
  576                         SCTP_IPI_ADDR_WUNLOCK();
  577                         return (sctp_ifap);
  578                 } else {
  579                         if (sctp_ifap->ifn_p) {
  580                                 /*
  581                                  * The last IFN gets the address, remove the
  582                                  * old one
  583                                  */
  584                                 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n",
  585                                     (void *)sctp_ifap, sctp_ifap->ifn_p->ifn_name,
  586                                     sctp_ifap->ifn_p->ifn_index, if_name,
  587                                     ifn_index);
  588                                 /* remove the address from the old ifn */
  589                                 sctp_remove_ifa_from_ifn(sctp_ifap);
  590                                 /* move the address over to the new ifn */
  591                                 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
  592                                 goto exit_stage_left;
  593                         } else {
  594                                 /* repair ifnp which was NULL ? */
  595                                 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
  596                                 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n",
  597                                     (void *)sctp_ifnp, (void *)sctp_ifap);
  598                                 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
  599                         }
  600                         goto exit_stage_left;
  601                 }
  602         }
  603         SCTP_IPI_ADDR_WUNLOCK();
  604         SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA);
  605         if (sctp_ifap == NULL) {
  606 #ifdef INVARIANTS
  607                 panic("No memory for IFA");
  608 #endif
  609                 return (NULL);
  610         }
  611         memset(sctp_ifap, 0, sizeof(struct sctp_ifa));
  612         sctp_ifap->ifn_p = sctp_ifnp;
  613         atomic_add_int(&sctp_ifnp->refcount, 1);
  614         sctp_ifap->vrf_id = vrf_id;
  615         sctp_ifap->ifa = ifa;
  616         memcpy(&sctp_ifap->address, addr, addr->sa_len);
  617         sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE;
  618         sctp_ifap->flags = ifa_flags;
  619         /* Set scope */
  620         switch (sctp_ifap->address.sa.sa_family) {
  621 #ifdef INET
  622         case AF_INET:
  623                 {
  624                         struct sockaddr_in *sin;
  625 
  626                         sin = (struct sockaddr_in *)&sctp_ifap->address.sin;
  627                         if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
  628                             (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) {
  629                                 sctp_ifap->src_is_loop = 1;
  630                         }
  631                         if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
  632                                 sctp_ifap->src_is_priv = 1;
  633                         }
  634                         sctp_ifnp->num_v4++;
  635                         if (new_ifn_af)
  636                                 new_ifn_af = AF_INET;
  637                         break;
  638                 }
  639 #endif
  640 #ifdef INET6
  641         case AF_INET6:
  642                 {
  643                         /* ok to use deprecated addresses? */
  644                         struct sockaddr_in6 *sin6;
  645 
  646                         sin6 = (struct sockaddr_in6 *)&sctp_ifap->address.sin6;
  647                         if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
  648                             (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) {
  649                                 sctp_ifap->src_is_loop = 1;
  650                         }
  651                         if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
  652                                 sctp_ifap->src_is_priv = 1;
  653                         }
  654                         sctp_ifnp->num_v6++;
  655                         if (new_ifn_af)
  656                                 new_ifn_af = AF_INET6;
  657                         break;
  658                 }
  659 #endif
  660         default:
  661                 new_ifn_af = 0;
  662                 break;
  663         }
  664         hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa);
  665 
  666         if ((sctp_ifap->src_is_priv == 0) &&
  667             (sctp_ifap->src_is_loop == 0)) {
  668                 sctp_ifap->src_is_glob = 1;
  669         }
  670         SCTP_IPI_ADDR_WLOCK();
  671         hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)];
  672         LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket);
  673         sctp_ifap->refcount = 1;
  674         LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
  675         sctp_ifnp->ifa_count++;
  676         vrf->total_ifa_count++;
  677         atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
  678         if (new_ifn_af) {
  679                 SCTP_REGISTER_INTERFACE(ifn_index, new_ifn_af);
  680                 sctp_ifnp->registered_af = new_ifn_af;
  681         }
  682         SCTP_IPI_ADDR_WUNLOCK();
  683         if (dynamic_add) {
  684                 /*
  685                  * Bump up the refcount so that when the timer completes it
  686                  * will drop back down.
  687                  */
  688                 struct sctp_laddr *wi;
  689 
  690                 atomic_add_int(&sctp_ifap->refcount, 1);
  691                 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
  692                 if (wi == NULL) {
  693                         /*
  694                          * Gak, what can we do? We have lost an address
  695                          * change can you say HOSED?
  696                          */
  697                         SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
  698                         /* Opps, must decrement the count */
  699                         sctp_del_addr_from_vrf(vrf_id, addr, ifn_index,
  700                             if_name);
  701                         return (NULL);
  702                 }
  703                 SCTP_INCR_LADDR_COUNT();
  704                 bzero(wi, sizeof(*wi));
  705                 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
  706                 wi->ifa = sctp_ifap;
  707                 wi->action = SCTP_ADD_IP_ADDRESS;
  708 
  709                 SCTP_WQ_ADDR_LOCK();
  710                 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
  711                 SCTP_WQ_ADDR_UNLOCK();
  712 
  713                 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
  714                     (struct sctp_inpcb *)NULL,
  715                     (struct sctp_tcb *)NULL,
  716                     (struct sctp_nets *)NULL);
  717         } else {
  718                 /* it's ready for use */
  719                 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
  720         }
  721         return (sctp_ifap);
  722 }
  723 
  724 void
  725 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr,
  726     uint32_t ifn_index, const char *if_name)
  727 {
  728         struct sctp_vrf *vrf;
  729         struct sctp_ifa *sctp_ifap = NULL;
  730 
  731         SCTP_IPI_ADDR_WLOCK();
  732         vrf = sctp_find_vrf(vrf_id);
  733         if (vrf == NULL) {
  734                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
  735                 goto out_now;
  736         }
  737 #ifdef SCTP_DEBUG
  738         SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id);
  739         SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
  740 #endif
  741         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
  742         if (sctp_ifap) {
  743                 /* Validate the delete */
  744                 if (sctp_ifap->ifn_p) {
  745                         int valid = 0;
  746 
  747                         /*-
  748                          * The name has priority over the ifn_index
  749                          * if its given. We do this especially for
  750                          * panda who might recycle indexes fast.
  751                          */
  752                         if (if_name) {
  753                                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) == 0) {
  754                                         /* They match its a correct delete */
  755                                         valid = 1;
  756                                 }
  757                         }
  758                         if (!valid) {
  759                                 /* last ditch check ifn_index */
  760                                 if (ifn_index == sctp_ifap->ifn_p->ifn_index) {
  761                                         valid = 1;
  762                                 }
  763                         }
  764                         if (!valid) {
  765                                 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n",
  766                                     ifn_index, ((if_name == NULL) ? "NULL" : if_name));
  767                                 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n",
  768                                     sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name);
  769                                 SCTP_IPI_ADDR_WUNLOCK();
  770                                 return;
  771                         }
  772                 }
  773                 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", (void *)sctp_ifap);
  774                 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID;
  775                 /*
  776                  * We don't set the flag. This means that the structure will
  777                  * hang around in EP's that have bound specific to it until
  778                  * they close. This gives us TCP like behavior if someone
  779                  * removes an address (or for that matter adds it right
  780                  * back).
  781                  */
  782                 /* sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; */
  783                 vrf->total_ifa_count--;
  784                 LIST_REMOVE(sctp_ifap, next_bucket);
  785                 sctp_remove_ifa_from_ifn(sctp_ifap);
  786         }
  787 #ifdef SCTP_DEBUG
  788         else {
  789                 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:",
  790                     ifn_index);
  791                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
  792         }
  793 #endif
  794 
  795 out_now:
  796         SCTP_IPI_ADDR_WUNLOCK();
  797         if (sctp_ifap) {
  798                 struct sctp_laddr *wi;
  799 
  800                 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
  801                 if (wi == NULL) {
  802                         /*
  803                          * Gak, what can we do? We have lost an address
  804                          * change can you say HOSED?
  805                          */
  806                         SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
  807 
  808                         /* Oops, must decrement the count */
  809                         sctp_free_ifa(sctp_ifap);
  810                         return;
  811                 }
  812                 SCTP_INCR_LADDR_COUNT();
  813                 bzero(wi, sizeof(*wi));
  814                 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
  815                 wi->ifa = sctp_ifap;
  816                 wi->action = SCTP_DEL_IP_ADDRESS;
  817                 SCTP_WQ_ADDR_LOCK();
  818                 /*
  819                  * Should this really be a tailq? As it is we will process
  820                  * the newest first :-0
  821                  */
  822                 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
  823                 SCTP_WQ_ADDR_UNLOCK();
  824 
  825                 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
  826                     (struct sctp_inpcb *)NULL,
  827                     (struct sctp_tcb *)NULL,
  828                     (struct sctp_nets *)NULL);
  829         }
  830         return;
  831 }
  832 
  833 
  834 static int
  835 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to)
  836 {
  837         int loopback_scope;
  838 
  839 #if defined(INET)
  840         int ipv4_local_scope, ipv4_addr_legal;
  841 
  842 #endif
  843 #if defined(INET6)
  844         int local_scope, site_scope, ipv6_addr_legal;
  845 
  846 #endif
  847         struct sctp_vrf *vrf;
  848         struct sctp_ifn *sctp_ifn;
  849         struct sctp_ifa *sctp_ifa;
  850 
  851         loopback_scope = stcb->asoc.scope.loopback_scope;
  852 #if defined(INET)
  853         ipv4_local_scope = stcb->asoc.scope.ipv4_local_scope;
  854         ipv4_addr_legal = stcb->asoc.scope.ipv4_addr_legal;
  855 #endif
  856 #if defined(INET6)
  857         local_scope = stcb->asoc.scope.local_scope;
  858         site_scope = stcb->asoc.scope.site_scope;
  859         ipv6_addr_legal = stcb->asoc.scope.ipv6_addr_legal;
  860 #endif
  861 
  862         SCTP_IPI_ADDR_RLOCK();
  863         vrf = sctp_find_vrf(stcb->asoc.vrf_id);
  864         if (vrf == NULL) {
  865                 /* no vrf, no addresses */
  866                 SCTP_IPI_ADDR_RUNLOCK();
  867                 return (0);
  868         }
  869         if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
  870                 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
  871                         if ((loopback_scope == 0) &&
  872                             SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
  873                                 continue;
  874                         }
  875                         LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
  876                                 if (sctp_is_addr_restricted(stcb, sctp_ifa) &&
  877                                     (!sctp_is_addr_pending(stcb, sctp_ifa))) {
  878                                         /*
  879                                          * We allow pending addresses, where
  880                                          * we have sent an asconf-add to be
  881                                          * considered valid.
  882                                          */
  883                                         continue;
  884                                 }
  885                                 if (sctp_ifa->address.sa.sa_family != to->sa_family) {
  886                                         continue;
  887                                 }
  888                                 switch (sctp_ifa->address.sa.sa_family) {
  889 #ifdef INET
  890                                 case AF_INET:
  891                                         if (ipv4_addr_legal) {
  892                                                 struct sockaddr_in *sin,
  893                                                            *rsin;
  894 
  895                                                 sin = &sctp_ifa->address.sin;
  896                                                 rsin = (struct sockaddr_in *)to;
  897                                                 if ((ipv4_local_scope == 0) &&
  898                                                     IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
  899                                                         continue;
  900                                                 }
  901                                                 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred,
  902                                                     &sin->sin_addr) != 0) {
  903                                                         continue;
  904                                                 }
  905                                                 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
  906                                                         SCTP_IPI_ADDR_RUNLOCK();
  907                                                         return (1);
  908                                                 }
  909                                         }
  910                                         break;
  911 #endif
  912 #ifdef INET6
  913                                 case AF_INET6:
  914                                         if (ipv6_addr_legal) {
  915                                                 struct sockaddr_in6 *sin6,
  916                                                             *rsin6;
  917 
  918                                                 sin6 = &sctp_ifa->address.sin6;
  919                                                 rsin6 = (struct sockaddr_in6 *)to;
  920                                                 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred,
  921                                                     &sin6->sin6_addr) != 0) {
  922                                                         continue;
  923                                                 }
  924                                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
  925                                                         if (local_scope == 0)
  926                                                                 continue;
  927                                                         if (sin6->sin6_scope_id == 0) {
  928                                                                 if (sa6_recoverscope(sin6) != 0)
  929                                                                         continue;
  930                                                         }
  931                                                 }
  932                                                 if ((site_scope == 0) &&
  933                                                     (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) {
  934                                                         continue;
  935                                                 }
  936                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
  937                                                         SCTP_IPI_ADDR_RUNLOCK();
  938                                                         return (1);
  939                                                 }
  940                                         }
  941                                         break;
  942 #endif
  943                                 default:
  944                                         /* TSNH */
  945                                         break;
  946                                 }
  947                         }
  948                 }
  949         } else {
  950                 struct sctp_laddr *laddr;
  951 
  952                 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
  953                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
  954                                 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
  955                                 continue;
  956                         }
  957                         if (sctp_is_addr_restricted(stcb, laddr->ifa) &&
  958                             (!sctp_is_addr_pending(stcb, laddr->ifa))) {
  959                                 /*
  960                                  * We allow pending addresses, where we have
  961                                  * sent an asconf-add to be considered
  962                                  * valid.
  963                                  */
  964                                 continue;
  965                         }
  966                         if (laddr->ifa->address.sa.sa_family != to->sa_family) {
  967                                 continue;
  968                         }
  969                         switch (to->sa_family) {
  970 #ifdef INET
  971                         case AF_INET:
  972                                 {
  973                                         struct sockaddr_in *sin, *rsin;
  974 
  975                                         sin = (struct sockaddr_in *)&laddr->ifa->address.sin;
  976                                         rsin = (struct sockaddr_in *)to;
  977                                         if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
  978                                                 SCTP_IPI_ADDR_RUNLOCK();
  979                                                 return (1);
  980                                         }
  981                                         break;
  982                                 }
  983 #endif
  984 #ifdef INET6
  985                         case AF_INET6:
  986                                 {
  987                                         struct sockaddr_in6 *sin6, *rsin6;
  988 
  989                                         sin6 = (struct sockaddr_in6 *)&laddr->ifa->address.sin6;
  990                                         rsin6 = (struct sockaddr_in6 *)to;
  991                                         if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
  992                                                 SCTP_IPI_ADDR_RUNLOCK();
  993                                                 return (1);
  994                                         }
  995                                         break;
  996                                 }
  997 
  998 #endif
  999                         default:
 1000                                 /* TSNH */
 1001                                 break;
 1002                         }
 1003 
 1004                 }
 1005         }
 1006         SCTP_IPI_ADDR_RUNLOCK();
 1007         return (0);
 1008 }
 1009 
 1010 
 1011 static struct sctp_tcb *
 1012 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from,
 1013     struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id)
 1014 {
 1015         /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */
 1016         /*
 1017          * If we support the TCP model, then we must now dig through to see
 1018          * if we can find our endpoint in the list of tcp ep's.
 1019          */
 1020         uint16_t lport, rport;
 1021         struct sctppcbhead *ephead;
 1022         struct sctp_inpcb *inp;
 1023         struct sctp_laddr *laddr;
 1024         struct sctp_tcb *stcb;
 1025         struct sctp_nets *net;
 1026 
 1027         if ((to == NULL) || (from == NULL)) {
 1028                 return (NULL);
 1029         }
 1030         switch (to->sa_family) {
 1031 #ifdef INET
 1032         case AF_INET:
 1033                 if (from->sa_family == AF_INET) {
 1034                         lport = ((struct sockaddr_in *)to)->sin_port;
 1035                         rport = ((struct sockaddr_in *)from)->sin_port;
 1036                 } else {
 1037                         return (NULL);
 1038                 }
 1039                 break;
 1040 #endif
 1041 #ifdef INET6
 1042         case AF_INET6:
 1043                 if (from->sa_family == AF_INET6) {
 1044                         lport = ((struct sockaddr_in6 *)to)->sin6_port;
 1045                         rport = ((struct sockaddr_in6 *)from)->sin6_port;
 1046                 } else {
 1047                         return (NULL);
 1048                 }
 1049                 break;
 1050 #endif
 1051         default:
 1052                 return (NULL);
 1053         }
 1054         ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
 1055         /*
 1056          * Ok now for each of the guys in this bucket we must look and see:
 1057          * - Does the remote port match. - Does there single association's
 1058          * addresses match this address (to). If so we update p_ep to point
 1059          * to this ep and return the tcb from it.
 1060          */
 1061         LIST_FOREACH(inp, ephead, sctp_hash) {
 1062                 SCTP_INP_RLOCK(inp);
 1063                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
 1064                         SCTP_INP_RUNLOCK(inp);
 1065                         continue;
 1066                 }
 1067                 if (lport != inp->sctp_lport) {
 1068                         SCTP_INP_RUNLOCK(inp);
 1069                         continue;
 1070                 }
 1071                 switch (to->sa_family) {
 1072 #ifdef INET
 1073                 case AF_INET:
 1074                         {
 1075                                 struct sockaddr_in *sin;
 1076 
 1077                                 sin = (struct sockaddr_in *)to;
 1078                                 if (prison_check_ip4(inp->ip_inp.inp.inp_cred,
 1079                                     &sin->sin_addr) != 0) {
 1080                                         SCTP_INP_RUNLOCK(inp);
 1081                                         continue;
 1082                                 }
 1083                                 break;
 1084                         }
 1085 #endif
 1086 #ifdef INET6
 1087                 case AF_INET6:
 1088                         {
 1089                                 struct sockaddr_in6 *sin6;
 1090 
 1091                                 sin6 = (struct sockaddr_in6 *)to;
 1092                                 if (prison_check_ip6(inp->ip_inp.inp.inp_cred,
 1093                                     &sin6->sin6_addr) != 0) {
 1094                                         SCTP_INP_RUNLOCK(inp);
 1095                                         continue;
 1096                                 }
 1097                                 break;
 1098                         }
 1099 #endif
 1100                 default:
 1101                         SCTP_INP_RUNLOCK(inp);
 1102                         continue;
 1103                 }
 1104                 if (inp->def_vrf_id != vrf_id) {
 1105                         SCTP_INP_RUNLOCK(inp);
 1106                         continue;
 1107                 }
 1108                 /* check to see if the ep has one of the addresses */
 1109                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
 1110                         /* We are NOT bound all, so look further */
 1111                         int match = 0;
 1112 
 1113                         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
 1114 
 1115                                 if (laddr->ifa == NULL) {
 1116                                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __FUNCTION__);
 1117                                         continue;
 1118                                 }
 1119                                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
 1120                                         SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
 1121                                         continue;
 1122                                 }
 1123                                 if (laddr->ifa->address.sa.sa_family ==
 1124                                     to->sa_family) {
 1125                                         /* see if it matches */
 1126 #ifdef INET
 1127                                         if (from->sa_family == AF_INET) {
 1128                                                 struct sockaddr_in *intf_addr,
 1129                                                            *sin;
 1130 
 1131                                                 intf_addr = &laddr->ifa->address.sin;
 1132                                                 sin = (struct sockaddr_in *)to;
 1133                                                 if (sin->sin_addr.s_addr ==
 1134                                                     intf_addr->sin_addr.s_addr) {
 1135                                                         match = 1;
 1136                                                         break;
 1137                                                 }
 1138                                         }
 1139 #endif
 1140 #ifdef INET6
 1141                                         if (from->sa_family == AF_INET6) {
 1142                                                 struct sockaddr_in6 *intf_addr6;
 1143                                                 struct sockaddr_in6 *sin6;
 1144 
 1145                                                 sin6 = (struct sockaddr_in6 *)
 1146                                                     to;
 1147                                                 intf_addr6 = &laddr->ifa->address.sin6;
 1148 
 1149                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
 1150                                                     intf_addr6)) {
 1151                                                         match = 1;
 1152                                                         break;
 1153                                                 }
 1154                                         }
 1155 #endif
 1156                                 }
 1157                         }
 1158                         if (match == 0) {
 1159                                 /* This endpoint does not have this address */
 1160                                 SCTP_INP_RUNLOCK(inp);
 1161                                 continue;
 1162                         }
 1163                 }
 1164                 /*
 1165                  * Ok if we hit here the ep has the address, does it hold
 1166                  * the tcb?
 1167                  */
 1168                 /* XXX: Why don't we TAILQ_FOREACH through sctp_asoc_list? */
 1169                 stcb = LIST_FIRST(&inp->sctp_asoc_list);
 1170                 if (stcb == NULL) {
 1171                         SCTP_INP_RUNLOCK(inp);
 1172                         continue;
 1173                 }
 1174                 SCTP_TCB_LOCK(stcb);
 1175                 if (!sctp_does_stcb_own_this_addr(stcb, to)) {
 1176                         SCTP_TCB_UNLOCK(stcb);
 1177                         SCTP_INP_RUNLOCK(inp);
 1178                         continue;
 1179                 }
 1180                 if (stcb->rport != rport) {
 1181                         /* remote port does not match. */
 1182                         SCTP_TCB_UNLOCK(stcb);
 1183                         SCTP_INP_RUNLOCK(inp);
 1184                         continue;
 1185                 }
 1186                 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
 1187                         SCTP_TCB_UNLOCK(stcb);
 1188                         SCTP_INP_RUNLOCK(inp);
 1189                         continue;
 1190                 }
 1191                 if (!sctp_does_stcb_own_this_addr(stcb, to)) {
 1192                         SCTP_TCB_UNLOCK(stcb);
 1193                         SCTP_INP_RUNLOCK(inp);
 1194                         continue;
 1195                 }
 1196                 /* Does this TCB have a matching address? */
 1197                 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 1198 
 1199                         if (net->ro._l_addr.sa.sa_family != from->sa_family) {
 1200                                 /* not the same family, can't be a match */
 1201                                 continue;
 1202                         }
 1203                         switch (from->sa_family) {
 1204 #ifdef INET
 1205                         case AF_INET:
 1206                                 {
 1207                                         struct sockaddr_in *sin, *rsin;
 1208 
 1209                                         sin = (struct sockaddr_in *)&net->ro._l_addr;
 1210                                         rsin = (struct sockaddr_in *)from;
 1211                                         if (sin->sin_addr.s_addr ==
 1212                                             rsin->sin_addr.s_addr) {
 1213                                                 /* found it */
 1214                                                 if (netp != NULL) {
 1215                                                         *netp = net;
 1216                                                 }
 1217                                                 /*
 1218                                                  * Update the endpoint
 1219                                                  * pointer
 1220                                                  */
 1221                                                 *inp_p = inp;
 1222                                                 SCTP_INP_RUNLOCK(inp);
 1223                                                 return (stcb);
 1224                                         }
 1225                                         break;
 1226                                 }
 1227 #endif
 1228 #ifdef INET6
 1229                         case AF_INET6:
 1230                                 {
 1231                                         struct sockaddr_in6 *sin6, *rsin6;
 1232 
 1233                                         sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
 1234                                         rsin6 = (struct sockaddr_in6 *)from;
 1235                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
 1236                                             rsin6)) {
 1237                                                 /* found it */
 1238                                                 if (netp != NULL) {
 1239                                                         *netp = net;
 1240                                                 }
 1241                                                 /*
 1242                                                  * Update the endpoint
 1243                                                  * pointer
 1244                                                  */
 1245                                                 *inp_p = inp;
 1246                                                 SCTP_INP_RUNLOCK(inp);
 1247                                                 return (stcb);
 1248                                         }
 1249                                         break;
 1250                                 }
 1251 #endif
 1252                         default:
 1253                                 /* TSNH */
 1254                                 break;
 1255                         }
 1256                 }
 1257                 SCTP_TCB_UNLOCK(stcb);
 1258                 SCTP_INP_RUNLOCK(inp);
 1259         }
 1260         return (NULL);
 1261 }
 1262 
 1263 
 1264 /*
 1265  * rules for use
 1266  *
 1267  * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an
 1268  * stcb, both will be locked (locked_tcb and stcb) but decrement will be done
 1269  * (if locked == NULL). 3) Decrement happens on return ONLY if locked ==
 1270  * NULL.
 1271  */
 1272 
 1273 struct sctp_tcb *
 1274 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote,
 1275     struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb)
 1276 {
 1277         struct sctpasochead *head;
 1278         struct sctp_inpcb *inp;
 1279         struct sctp_tcb *stcb = NULL;
 1280         struct sctp_nets *net;
 1281         uint16_t rport;
 1282 
 1283         inp = *inp_p;
 1284         switch (remote->sa_family) {
 1285 #ifdef INET
 1286         case AF_INET:
 1287                 rport = (((struct sockaddr_in *)remote)->sin_port);
 1288                 break;
 1289 #endif
 1290 #ifdef INET6
 1291         case AF_INET6:
 1292                 rport = (((struct sockaddr_in6 *)remote)->sin6_port);
 1293                 break;
 1294 #endif
 1295         default:
 1296                 return (NULL);
 1297         }
 1298         if (locked_tcb) {
 1299                 /*
 1300                  * UN-lock so we can do proper locking here this occurs when
 1301                  * called from load_addresses_from_init.
 1302                  */
 1303                 atomic_add_int(&locked_tcb->asoc.refcnt, 1);
 1304                 SCTP_TCB_UNLOCK(locked_tcb);
 1305         }
 1306         SCTP_INP_INFO_RLOCK();
 1307         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
 1308             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
 1309                 /*-
 1310                  * Now either this guy is our listener or it's the
 1311                  * connector. If it is the one that issued the connect, then
 1312                  * it's only chance is to be the first TCB in the list. If
 1313                  * it is the acceptor, then do the special_lookup to hash
 1314                  * and find the real inp.
 1315                  */
 1316                 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) {
 1317                         /* to is peer addr, from is my addr */
 1318                         stcb = sctp_tcb_special_locate(inp_p, remote, local,
 1319                             netp, inp->def_vrf_id);
 1320                         if ((stcb != NULL) && (locked_tcb == NULL)) {
 1321                                 /* we have a locked tcb, lower refcount */
 1322                                 SCTP_INP_DECR_REF(inp);
 1323                         }
 1324                         if ((locked_tcb != NULL) && (locked_tcb != stcb)) {
 1325                                 SCTP_INP_RLOCK(locked_tcb->sctp_ep);
 1326                                 SCTP_TCB_LOCK(locked_tcb);
 1327                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
 1328                                 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep);
 1329                         }
 1330                         SCTP_INP_INFO_RUNLOCK();
 1331                         return (stcb);
 1332                 } else {
 1333                         SCTP_INP_WLOCK(inp);
 1334                         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
 1335                                 goto null_return;
 1336                         }
 1337                         stcb = LIST_FIRST(&inp->sctp_asoc_list);
 1338                         if (stcb == NULL) {
 1339                                 goto null_return;
 1340                         }
 1341                         SCTP_TCB_LOCK(stcb);
 1342 
 1343                         if (stcb->rport != rport) {
 1344                                 /* remote port does not match. */
 1345                                 SCTP_TCB_UNLOCK(stcb);
 1346                                 goto null_return;
 1347                         }
 1348                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
 1349                                 SCTP_TCB_UNLOCK(stcb);
 1350                                 goto null_return;
 1351                         }
 1352                         if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
 1353                                 SCTP_TCB_UNLOCK(stcb);
 1354                                 goto null_return;
 1355                         }
 1356                         /* now look at the list of remote addresses */
 1357                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 1358 #ifdef INVARIANTS
 1359                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
 1360                                         panic("Corrupt net list");
 1361                                 }
 1362 #endif
 1363                                 if (net->ro._l_addr.sa.sa_family !=
 1364                                     remote->sa_family) {
 1365                                         /* not the same family */
 1366                                         continue;
 1367                                 }
 1368                                 switch (remote->sa_family) {
 1369 #ifdef INET
 1370                                 case AF_INET:
 1371                                         {
 1372                                                 struct sockaddr_in *sin,
 1373                                                            *rsin;
 1374 
 1375                                                 sin = (struct sockaddr_in *)
 1376                                                     &net->ro._l_addr;
 1377                                                 rsin = (struct sockaddr_in *)remote;
 1378                                                 if (sin->sin_addr.s_addr ==
 1379                                                     rsin->sin_addr.s_addr) {
 1380                                                         /* found it */
 1381                                                         if (netp != NULL) {
 1382                                                                 *netp = net;
 1383                                                         }
 1384                                                         if (locked_tcb == NULL) {
 1385                                                                 SCTP_INP_DECR_REF(inp);
 1386                                                         } else if (locked_tcb != stcb) {
 1387                                                                 SCTP_TCB_LOCK(locked_tcb);
 1388                                                         }
 1389                                                         if (locked_tcb) {
 1390                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
 1391                                                         }
 1392                                                         SCTP_INP_WUNLOCK(inp);
 1393                                                         SCTP_INP_INFO_RUNLOCK();
 1394                                                         return (stcb);
 1395                                                 }
 1396                                                 break;
 1397                                         }
 1398 #endif
 1399 #ifdef INET6
 1400                                 case AF_INET6:
 1401                                         {
 1402                                                 struct sockaddr_in6 *sin6,
 1403                                                             *rsin6;
 1404 
 1405                                                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
 1406                                                 rsin6 = (struct sockaddr_in6 *)remote;
 1407                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
 1408                                                     rsin6)) {
 1409                                                         /* found it */
 1410                                                         if (netp != NULL) {
 1411                                                                 *netp = net;
 1412                                                         }
 1413                                                         if (locked_tcb == NULL) {
 1414                                                                 SCTP_INP_DECR_REF(inp);
 1415                                                         } else if (locked_tcb != stcb) {
 1416                                                                 SCTP_TCB_LOCK(locked_tcb);
 1417                                                         }
 1418                                                         if (locked_tcb) {
 1419                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
 1420                                                         }
 1421                                                         SCTP_INP_WUNLOCK(inp);
 1422                                                         SCTP_INP_INFO_RUNLOCK();
 1423                                                         return (stcb);
 1424                                                 }
 1425                                                 break;
 1426                                         }
 1427 #endif
 1428                                 default:
 1429                                         /* TSNH */
 1430                                         break;
 1431                                 }
 1432                         }
 1433                         SCTP_TCB_UNLOCK(stcb);
 1434                 }
 1435         } else {
 1436                 SCTP_INP_WLOCK(inp);
 1437                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
 1438                         goto null_return;
 1439                 }
 1440                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport,
 1441                     inp->sctp_hashmark)];
 1442                 if (head == NULL) {
 1443                         goto null_return;
 1444                 }
 1445                 LIST_FOREACH(stcb, head, sctp_tcbhash) {
 1446                         if (stcb->rport != rport) {
 1447                                 /* remote port does not match */
 1448                                 continue;
 1449                         }
 1450                         SCTP_TCB_LOCK(stcb);
 1451                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
 1452                                 SCTP_TCB_UNLOCK(stcb);
 1453                                 continue;
 1454                         }
 1455                         if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
 1456                                 SCTP_TCB_UNLOCK(stcb);
 1457                                 continue;
 1458                         }
 1459                         /* now look at the list of remote addresses */
 1460                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 1461 #ifdef INVARIANTS
 1462                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
 1463                                         panic("Corrupt net list");
 1464                                 }
 1465 #endif
 1466                                 if (net->ro._l_addr.sa.sa_family !=
 1467                                     remote->sa_family) {
 1468                                         /* not the same family */
 1469                                         continue;
 1470                                 }
 1471                                 switch (remote->sa_family) {
 1472 #ifdef INET
 1473                                 case AF_INET:
 1474                                         {
 1475                                                 struct sockaddr_in *sin,
 1476                                                            *rsin;
 1477 
 1478                                                 sin = (struct sockaddr_in *)
 1479                                                     &net->ro._l_addr;
 1480                                                 rsin = (struct sockaddr_in *)remote;
 1481                                                 if (sin->sin_addr.s_addr ==
 1482                                                     rsin->sin_addr.s_addr) {
 1483                                                         /* found it */
 1484                                                         if (netp != NULL) {
 1485                                                                 *netp = net;
 1486                                                         }
 1487                                                         if (locked_tcb == NULL) {
 1488                                                                 SCTP_INP_DECR_REF(inp);
 1489                                                         } else if (locked_tcb != stcb) {
 1490                                                                 SCTP_TCB_LOCK(locked_tcb);
 1491                                                         }
 1492                                                         if (locked_tcb) {
 1493                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
 1494                                                         }
 1495                                                         SCTP_INP_WUNLOCK(inp);
 1496                                                         SCTP_INP_INFO_RUNLOCK();
 1497                                                         return (stcb);
 1498                                                 }
 1499                                                 break;
 1500                                         }
 1501 #endif
 1502 #ifdef INET6
 1503                                 case AF_INET6:
 1504                                         {
 1505                                                 struct sockaddr_in6 *sin6,
 1506                                                             *rsin6;
 1507 
 1508                                                 sin6 = (struct sockaddr_in6 *)
 1509                                                     &net->ro._l_addr;
 1510                                                 rsin6 = (struct sockaddr_in6 *)remote;
 1511                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
 1512                                                     rsin6)) {
 1513                                                         /* found it */
 1514                                                         if (netp != NULL) {
 1515                                                                 *netp = net;
 1516                                                         }
 1517                                                         if (locked_tcb == NULL) {
 1518                                                                 SCTP_INP_DECR_REF(inp);
 1519                                                         } else if (locked_tcb != stcb) {
 1520                                                                 SCTP_TCB_LOCK(locked_tcb);
 1521                                                         }
 1522                                                         if (locked_tcb) {
 1523                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
 1524                                                         }
 1525                                                         SCTP_INP_WUNLOCK(inp);
 1526                                                         SCTP_INP_INFO_RUNLOCK();
 1527                                                         return (stcb);
 1528                                                 }
 1529                                                 break;
 1530                                         }
 1531 #endif
 1532                                 default:
 1533                                         /* TSNH */
 1534                                         break;
 1535                                 }
 1536                         }
 1537                         SCTP_TCB_UNLOCK(stcb);
 1538                 }
 1539         }
 1540 null_return:
 1541         /* clean up for returning null */
 1542         if (locked_tcb) {
 1543                 SCTP_TCB_LOCK(locked_tcb);
 1544                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
 1545         }
 1546         SCTP_INP_WUNLOCK(inp);
 1547         SCTP_INP_INFO_RUNLOCK();
 1548         /* not found */
 1549         return (NULL);
 1550 }
 1551 
 1552 
 1553 /*
 1554  * Find an association for a specific endpoint using the association id given
 1555  * out in the COMM_UP notification
 1556  */
 1557 struct sctp_tcb *
 1558 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
 1559 {
 1560         /*
 1561          * Use my the assoc_id to find a endpoint
 1562          */
 1563         struct sctpasochead *head;
 1564         struct sctp_tcb *stcb;
 1565         uint32_t id;
 1566 
 1567         if (inp == NULL) {
 1568                 SCTP_PRINTF("TSNH ep_associd\n");
 1569                 return (NULL);
 1570         }
 1571         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
 1572                 SCTP_PRINTF("TSNH ep_associd0\n");
 1573                 return (NULL);
 1574         }
 1575         id = (uint32_t) asoc_id;
 1576         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
 1577         if (head == NULL) {
 1578                 /* invalid id TSNH */
 1579                 SCTP_PRINTF("TSNH ep_associd1\n");
 1580                 return (NULL);
 1581         }
 1582         LIST_FOREACH(stcb, head, sctp_tcbasocidhash) {
 1583                 if (stcb->asoc.assoc_id == id) {
 1584                         if (inp != stcb->sctp_ep) {
 1585                                 /*
 1586                                  * some other guy has the same id active (id
 1587                                  * collision ??).
 1588                                  */
 1589                                 SCTP_PRINTF("TSNH ep_associd2\n");
 1590                                 continue;
 1591                         }
 1592                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
 1593                                 continue;
 1594                         }
 1595                         if (want_lock) {
 1596                                 SCTP_TCB_LOCK(stcb);
 1597                         }
 1598                         return (stcb);
 1599                 }
 1600         }
 1601         return (NULL);
 1602 }
 1603 
 1604 
 1605 struct sctp_tcb *
 1606 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
 1607 {
 1608         struct sctp_tcb *stcb;
 1609 
 1610         SCTP_INP_RLOCK(inp);
 1611         stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock);
 1612         SCTP_INP_RUNLOCK(inp);
 1613         return (stcb);
 1614 }
 1615 
 1616 
 1617 /*
 1618  * Endpoint probe expects that the INP_INFO is locked.
 1619  */
 1620 static struct sctp_inpcb *
 1621 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head,
 1622     uint16_t lport, uint32_t vrf_id)
 1623 {
 1624         struct sctp_inpcb *inp;
 1625         struct sctp_laddr *laddr;
 1626 
 1627 #ifdef INET
 1628         struct sockaddr_in *sin;
 1629 
 1630 #endif
 1631 #ifdef INET6
 1632         struct sockaddr_in6 *sin6;
 1633         struct sockaddr_in6 *intf_addr6;
 1634 
 1635 #endif
 1636         int fnd;
 1637 
 1638 #ifdef INET
 1639         sin = NULL;
 1640 #endif
 1641 #ifdef INET6
 1642         sin6 = NULL;
 1643 #endif
 1644         switch (nam->sa_family) {
 1645 #ifdef INET
 1646         case AF_INET:
 1647                 sin = (struct sockaddr_in *)nam;
 1648                 break;
 1649 #endif
 1650 #ifdef INET6
 1651         case AF_INET6:
 1652                 sin6 = (struct sockaddr_in6 *)nam;
 1653                 break;
 1654 #endif
 1655         default:
 1656                 /* unsupported family */
 1657                 return (NULL);
 1658         }
 1659 
 1660         if (head == NULL)
 1661                 return (NULL);
 1662 
 1663         LIST_FOREACH(inp, head, sctp_hash) {
 1664                 SCTP_INP_RLOCK(inp);
 1665                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
 1666                         SCTP_INP_RUNLOCK(inp);
 1667                         continue;
 1668                 }
 1669                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) &&
 1670                     (inp->sctp_lport == lport)) {
 1671                         /* got it */
 1672                         switch (nam->sa_family) {
 1673 #ifdef INET
 1674                         case AF_INET:
 1675                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
 1676                                     SCTP_IPV6_V6ONLY(inp)) {
 1677                                         /*
 1678                                          * IPv4 on a IPv6 socket with ONLY
 1679                                          * IPv6 set
 1680                                          */
 1681                                         SCTP_INP_RUNLOCK(inp);
 1682                                         continue;
 1683                                 }
 1684                                 if (prison_check_ip4(inp->ip_inp.inp.inp_cred,
 1685                                     &sin->sin_addr) != 0) {
 1686                                         SCTP_INP_RUNLOCK(inp);
 1687                                         continue;
 1688                                 }
 1689                                 break;
 1690 #endif
 1691 #ifdef INET6
 1692                         case AF_INET6:
 1693                                 /*
 1694                                  * A V6 address and the endpoint is NOT
 1695                                  * bound V6
 1696                                  */
 1697                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
 1698                                         SCTP_INP_RUNLOCK(inp);
 1699                                         continue;
 1700                                 }
 1701                                 if (prison_check_ip6(inp->ip_inp.inp.inp_cred,
 1702                                     &sin6->sin6_addr) != 0) {
 1703                                         SCTP_INP_RUNLOCK(inp);
 1704                                         continue;
 1705                                 }
 1706                                 break;
 1707 #endif
 1708                         default:
 1709                                 break;
 1710                         }
 1711                         /* does a VRF id match? */
 1712                         fnd = 0;
 1713                         if (inp->def_vrf_id == vrf_id)
 1714                                 fnd = 1;
 1715 
 1716                         SCTP_INP_RUNLOCK(inp);
 1717                         if (!fnd)
 1718                                 continue;
 1719                         return (inp);
 1720                 }
 1721                 SCTP_INP_RUNLOCK(inp);
 1722         }
 1723         switch (nam->sa_family) {
 1724 #ifdef INET
 1725         case AF_INET:
 1726                 if (sin->sin_addr.s_addr == INADDR_ANY) {
 1727                         /* Can't hunt for one that has no address specified */
 1728                         return (NULL);
 1729                 }
 1730                 break;
 1731 #endif
 1732 #ifdef INET6
 1733         case AF_INET6:
 1734                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
 1735                         /* Can't hunt for one that has no address specified */
 1736                         return (NULL);
 1737                 }
 1738                 break;
 1739 #endif
 1740         default:
 1741                 break;
 1742         }
 1743         /*
 1744          * ok, not bound to all so see if we can find a EP bound to this
 1745          * address.
 1746          */
 1747         LIST_FOREACH(inp, head, sctp_hash) {
 1748                 SCTP_INP_RLOCK(inp);
 1749                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
 1750                         SCTP_INP_RUNLOCK(inp);
 1751                         continue;
 1752                 }
 1753                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) {
 1754                         SCTP_INP_RUNLOCK(inp);
 1755                         continue;
 1756                 }
 1757                 /*
 1758                  * Ok this could be a likely candidate, look at all of its
 1759                  * addresses
 1760                  */
 1761                 if (inp->sctp_lport != lport) {
 1762                         SCTP_INP_RUNLOCK(inp);
 1763                         continue;
 1764                 }
 1765                 /* does a VRF id match? */
 1766                 fnd = 0;
 1767                 if (inp->def_vrf_id == vrf_id)
 1768                         fnd = 1;
 1769 
 1770                 if (!fnd) {
 1771                         SCTP_INP_RUNLOCK(inp);
 1772                         continue;
 1773                 }
 1774                 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
 1775                         if (laddr->ifa == NULL) {
 1776                                 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
 1777                                     __FUNCTION__);
 1778                                 continue;
 1779                         }
 1780                         SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ",
 1781                             (void *)laddr->ifa);
 1782                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
 1783                                 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n");
 1784                                 continue;
 1785                         }
 1786                         if (laddr->ifa->address.sa.sa_family == nam->sa_family) {
 1787                                 /* possible, see if it matches */
 1788                                 switch (nam->sa_family) {
 1789 #ifdef INET
 1790                                 case AF_INET:
 1791                                         if (sin->sin_addr.s_addr ==
 1792                                             laddr->ifa->address.sin.sin_addr.s_addr) {
 1793                                                 SCTP_INP_RUNLOCK(inp);
 1794                                                 return (inp);
 1795                                         }
 1796                                         break;
 1797 #endif
 1798 #ifdef INET6
 1799                                 case AF_INET6:
 1800                                         intf_addr6 = &laddr->ifa->address.sin6;
 1801                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
 1802                                             intf_addr6)) {
 1803                                                 SCTP_INP_RUNLOCK(inp);
 1804                                                 return (inp);
 1805                                         }
 1806                                         break;
 1807 #endif
 1808                                 }
 1809                         }
 1810                 }
 1811                 SCTP_INP_RUNLOCK(inp);
 1812         }
 1813         return (NULL);
 1814 }
 1815 
 1816 
 1817 static struct sctp_inpcb *
 1818 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id)
 1819 {
 1820         struct sctppcbhead *head;
 1821         struct sctp_inpcb *t_inp;
 1822         int fnd;
 1823 
 1824         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
 1825             SCTP_BASE_INFO(hashmark))];
 1826         LIST_FOREACH(t_inp, head, sctp_hash) {
 1827                 if (t_inp->sctp_lport != lport) {
 1828                         continue;
 1829                 }
 1830                 /* is it in the VRF in question */
 1831                 fnd = 0;
 1832                 if (t_inp->def_vrf_id == vrf_id)
 1833                         fnd = 1;
 1834                 if (!fnd)
 1835                         continue;
 1836 
 1837                 /* This one is in use. */
 1838                 /* check the v6/v4 binding issue */
 1839                 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
 1840                     SCTP_IPV6_V6ONLY(t_inp)) {
 1841                         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
 1842                                 /* collision in V6 space */
 1843                                 return (t_inp);
 1844                         } else {
 1845                                 /* inp is BOUND_V4 no conflict */
 1846                                 continue;
 1847                         }
 1848                 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
 1849                         /* t_inp is bound v4 and v6, conflict always */
 1850                         return (t_inp);
 1851                 } else {
 1852                         /* t_inp is bound only V4 */
 1853                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
 1854                             SCTP_IPV6_V6ONLY(inp)) {
 1855                                 /* no conflict */
 1856                                 continue;
 1857                         }
 1858                         /* else fall through to conflict */
 1859                 }
 1860                 return (t_inp);
 1861         }
 1862         return (NULL);
 1863 }
 1864 
 1865 
 1866 int
 1867 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp)
 1868 {
 1869         /* For 1-2-1 with port reuse */
 1870         struct sctppcbhead *head;
 1871         struct sctp_inpcb *tinp;
 1872 
 1873         if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) {
 1874                 /* only works with port reuse on */
 1875                 return (-1);
 1876         }
 1877         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) {
 1878                 return (0);
 1879         }
 1880         SCTP_INP_RUNLOCK(inp);
 1881         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(tinp, head, sctp_hash) {
 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         return (0);
 1913 }
 1914 
 1915 
 1916 struct sctp_inpcb *
 1917 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock,
 1918     uint32_t vrf_id)
 1919 {
 1920         /*
 1921          * First we check the hash table to see if someone has this port
 1922          * bound with just the port.
 1923          */
 1924         struct sctp_inpcb *inp;
 1925         struct sctppcbhead *head;
 1926         int lport;
 1927         unsigned int i;
 1928 
 1929 #ifdef INET
 1930         struct sockaddr_in *sin;
 1931 
 1932 #endif
 1933 #ifdef INET6
 1934         struct sockaddr_in6 *sin6;
 1935 
 1936 #endif
 1937 
 1938         switch (nam->sa_family) {
 1939 #ifdef INET
 1940         case AF_INET:
 1941                 sin = (struct sockaddr_in *)nam;
 1942                 lport = sin->sin_port;
 1943                 break;
 1944 #endif
 1945 #ifdef INET6
 1946         case AF_INET6:
 1947                 sin6 = (struct sockaddr_in6 *)nam;
 1948                 lport = sin6->sin6_port;
 1949                 break;
 1950 #endif
 1951         default:
 1952                 return (NULL);
 1953         }
 1954         /*
 1955          * I could cheat here and just cast to one of the types but we will
 1956          * do it right. It also provides the check against an Unsupported
 1957          * type too.
 1958          */
 1959         /* Find the head of the ALLADDR chain */
 1960         if (have_lock == 0) {
 1961                 SCTP_INP_INFO_RLOCK();
 1962         }
 1963         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
 1964             SCTP_BASE_INFO(hashmark))];
 1965         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
 1966 
 1967         /*
 1968          * If the TCP model exists it could be that the main listening
 1969          * endpoint is gone but there still exists a connected socket for
 1970          * this guy. If so we can return the first one that we find. This
 1971          * may NOT be the correct one so the caller should be wary on the
 1972          * returned INP. Currently the only caller that sets find_tcp_pool
 1973          * is in bindx where we are verifying that a user CAN bind the
 1974          * address. He either has bound it already, or someone else has, or
 1975          * its open to bind, so this is good enough.
 1976          */
 1977         if (inp == NULL && find_tcp_pool) {
 1978                 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) {
 1979                         head = &SCTP_BASE_INFO(sctp_tcpephash)[i];
 1980                         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
 1981                         if (inp) {
 1982                                 break;
 1983                         }
 1984                 }
 1985         }
 1986         if (inp) {
 1987                 SCTP_INP_INCR_REF(inp);
 1988         }
 1989         if (have_lock == 0) {
 1990                 SCTP_INP_INFO_RUNLOCK();
 1991         }
 1992         return (inp);
 1993 }
 1994 
 1995 
 1996 /*
 1997  * Find an association for an endpoint with the pointer to whom you want to
 1998  * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may
 1999  * need to change the *to to some other struct like a mbuf...
 2000  */
 2001 struct sctp_tcb *
 2002 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to,
 2003     struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool,
 2004     uint32_t vrf_id)
 2005 {
 2006         struct sctp_inpcb *inp = NULL;
 2007         struct sctp_tcb *stcb;
 2008 
 2009         SCTP_INP_INFO_RLOCK();
 2010         if (find_tcp_pool) {
 2011                 if (inp_p != NULL) {
 2012                         stcb = sctp_tcb_special_locate(inp_p, from, to, netp,
 2013                             vrf_id);
 2014                 } else {
 2015                         stcb = sctp_tcb_special_locate(&inp, from, to, netp,
 2016                             vrf_id);
 2017                 }
 2018                 if (stcb != NULL) {
 2019                         SCTP_INP_INFO_RUNLOCK();
 2020                         return (stcb);
 2021                 }
 2022         }
 2023         inp = sctp_pcb_findep(to, 0, 1, vrf_id);
 2024         if (inp_p != NULL) {
 2025                 *inp_p = inp;
 2026         }
 2027         SCTP_INP_INFO_RUNLOCK();
 2028         if (inp == NULL) {
 2029                 return (NULL);
 2030         }
 2031         /*
 2032          * ok, we have an endpoint, now lets find the assoc for it (if any)
 2033          * we now place the source address or from in the to of the find
 2034          * endpoint call. Since in reality this chain is used from the
 2035          * inbound packet side.
 2036          */
 2037         if (inp_p != NULL) {
 2038                 stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to,
 2039                     NULL);
 2040         } else {
 2041                 stcb = sctp_findassociation_ep_addr(&inp, from, netp, to,
 2042                     NULL);
 2043         }
 2044         return (stcb);
 2045 }
 2046 
 2047 
 2048 /*
 2049  * This routine will grub through the mbuf that is a INIT or INIT-ACK and
 2050  * find all addresses that the sender has specified in any address list. Each
 2051  * address will be used to lookup the TCB and see if one exits.
 2052  */
 2053 static struct sctp_tcb *
 2054 sctp_findassociation_special_addr(struct mbuf *m, int offset,
 2055     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp,
 2056     struct sockaddr *dst)
 2057 {
 2058         struct sctp_paramhdr *phdr, parm_buf;
 2059 
 2060 #if defined(INET) || defined(INET6)
 2061         struct sctp_tcb *stcb;
 2062         uint16_t ptype;
 2063 
 2064 #endif
 2065         uint16_t plen;
 2066 
 2067 #ifdef INET
 2068         struct sockaddr_in sin4;
 2069 
 2070 #endif
 2071 #ifdef INET6
 2072         struct sockaddr_in6 sin6;
 2073 
 2074 #endif
 2075 
 2076 #ifdef INET
 2077         memset(&sin4, 0, sizeof(sin4));
 2078         sin4.sin_len = sizeof(sin4);
 2079         sin4.sin_family = AF_INET;
 2080         sin4.sin_port = sh->src_port;
 2081 #endif
 2082 #ifdef INET6
 2083         memset(&sin6, 0, sizeof(sin6));
 2084         sin6.sin6_len = sizeof(sin6);
 2085         sin6.sin6_family = AF_INET6;
 2086         sin6.sin6_port = sh->src_port;
 2087 #endif
 2088 
 2089         offset += sizeof(struct sctp_init_chunk);
 2090 
 2091         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
 2092         while (phdr != NULL) {
 2093                 /* now we must see if we want the parameter */
 2094 #if defined(INET) || defined(INET6)
 2095                 ptype = ntohs(phdr->param_type);
 2096 #endif
 2097                 plen = ntohs(phdr->param_length);
 2098                 if (plen == 0) {
 2099                         break;
 2100                 }
 2101 #ifdef INET
 2102                 if (ptype == SCTP_IPV4_ADDRESS &&
 2103                     plen == sizeof(struct sctp_ipv4addr_param)) {
 2104                         /* Get the rest of the address */
 2105                         struct sctp_ipv4addr_param ip4_parm, *p4;
 2106 
 2107                         phdr = sctp_get_next_param(m, offset,
 2108                             (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm)));
 2109                         if (phdr == NULL) {
 2110                                 return (NULL);
 2111                         }
 2112                         p4 = (struct sctp_ipv4addr_param *)phdr;
 2113                         memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr));
 2114                         /* look it up */
 2115                         stcb = sctp_findassociation_ep_addr(inp_p,
 2116                             (struct sockaddr *)&sin4, netp, dst, NULL);
 2117                         if (stcb != NULL) {
 2118                                 return (stcb);
 2119                         }
 2120                 }
 2121 #endif
 2122 #ifdef INET6
 2123                 if (ptype == SCTP_IPV6_ADDRESS &&
 2124                     plen == sizeof(struct sctp_ipv6addr_param)) {
 2125                         /* Get the rest of the address */
 2126                         struct sctp_ipv6addr_param ip6_parm, *p6;
 2127 
 2128                         phdr = sctp_get_next_param(m, offset,
 2129                             (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm)));
 2130                         if (phdr == NULL) {
 2131                                 return (NULL);
 2132                         }
 2133                         p6 = (struct sctp_ipv6addr_param *)phdr;
 2134                         memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr));
 2135                         /* look it up */
 2136                         stcb = sctp_findassociation_ep_addr(inp_p,
 2137                             (struct sockaddr *)&sin6, netp, dst, NULL);
 2138                         if (stcb != NULL) {
 2139                                 return (stcb);
 2140                         }
 2141                 }
 2142 #endif
 2143                 offset += SCTP_SIZE32(plen);
 2144                 phdr = sctp_get_next_param(m, offset, &parm_buf,
 2145                     sizeof(parm_buf));
 2146         }
 2147         return (NULL);
 2148 }
 2149 
 2150 static struct sctp_tcb *
 2151 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag,
 2152     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport,
 2153     uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag)
 2154 {
 2155         /*
 2156          * Use my vtag to hash. If we find it we then verify the source addr
 2157          * is in the assoc. If all goes well we save a bit on rec of a
 2158          * packet.
 2159          */
 2160         struct sctpasochead *head;
 2161         struct sctp_nets *net;
 2162         struct sctp_tcb *stcb;
 2163 
 2164         SCTP_INP_INFO_RLOCK();
 2165         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag,
 2166             SCTP_BASE_INFO(hashasocmark))];
 2167         if (head == NULL) {
 2168                 /* invalid vtag */
 2169                 SCTP_INP_INFO_RUNLOCK();
 2170                 return (NULL);
 2171         }
 2172         LIST_FOREACH(stcb, head, sctp_asocs) {
 2173                 SCTP_INP_RLOCK(stcb->sctp_ep);
 2174                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
 2175                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
 2176                         continue;
 2177                 }
 2178                 if (stcb->sctp_ep->def_vrf_id != vrf_id) {
 2179                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
 2180                         continue;
 2181                 }
 2182                 SCTP_TCB_LOCK(stcb);
 2183                 SCTP_INP_RUNLOCK(stcb->sctp_ep);
 2184                 if (stcb->asoc.my_vtag == vtag) {
 2185                         /* candidate */
 2186                         if (stcb->rport != rport) {
 2187                                 SCTP_TCB_UNLOCK(stcb);
 2188                                 continue;
 2189                         }
 2190                         if (stcb->sctp_ep->sctp_lport != lport) {
 2191                                 SCTP_TCB_UNLOCK(stcb);
 2192                                 continue;
 2193                         }
 2194                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
 2195                                 SCTP_TCB_UNLOCK(stcb);
 2196                                 continue;
 2197                         }
 2198                         /* RRS:Need toaddr check here */
 2199                         if (sctp_does_stcb_own_this_addr(stcb, to) == 0) {
 2200                                 /* Endpoint does not own this address */
 2201                                 SCTP_TCB_UNLOCK(stcb);
 2202                                 continue;
 2203                         }
 2204                         if (remote_tag) {
 2205                                 /*
 2206                                  * If we have both vtags that's all we match
 2207                                  * on
 2208                                  */
 2209                                 if (stcb->asoc.peer_vtag == remote_tag) {
 2210                                         /*
 2211                                          * If both tags match we consider it
 2212                                          * conclusive and check NO
 2213                                          * source/destination addresses
 2214                                          */
 2215                                         goto conclusive;
 2216                                 }
 2217                         }
 2218                         if (skip_src_check) {
 2219                 conclusive:
 2220                                 if (from) {
 2221                                         *netp = sctp_findnet(stcb, from);
 2222                                 } else {
 2223                                         *netp = NULL;   /* unknown */
 2224                                 }
 2225                                 if (inp_p)
 2226                                         *inp_p = stcb->sctp_ep;
 2227                                 SCTP_INP_INFO_RUNLOCK();
 2228                                 return (stcb);
 2229                         }
 2230                         net = sctp_findnet(stcb, from);
 2231                         if (net) {
 2232                                 /* yep its him. */
 2233                                 *netp = net;
 2234                                 SCTP_STAT_INCR(sctps_vtagexpress);
 2235                                 *inp_p = stcb->sctp_ep;
 2236                                 SCTP_INP_INFO_RUNLOCK();
 2237                                 return (stcb);
 2238                         } else {
 2239                                 /*
 2240                                  * not him, this should only happen in rare
 2241                                  * cases so I peg it.
 2242                                  */
 2243                                 SCTP_STAT_INCR(sctps_vtagbogus);
 2244                         }
 2245                 }
 2246                 SCTP_TCB_UNLOCK(stcb);
 2247         }
 2248         SCTP_INP_INFO_RUNLOCK();
 2249         return (NULL);
 2250 }
 2251 
 2252 
 2253 /*
 2254  * Find an association with the pointer to the inbound IP packet. This can be
 2255  * a IPv4 or IPv6 packet.
 2256  */
 2257 struct sctp_tcb *
 2258 sctp_findassociation_addr(struct mbuf *m, int offset,
 2259     struct sockaddr *src, struct sockaddr *dst,
 2260     struct sctphdr *sh, struct sctp_chunkhdr *ch,
 2261     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
 2262 {
 2263         int find_tcp_pool;
 2264         struct sctp_tcb *stcb;
 2265         struct sctp_inpcb *inp;
 2266 
 2267         if (sh->v_tag) {
 2268                 /* we only go down this path if vtag is non-zero */
 2269                 stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag),
 2270                     inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0);
 2271                 if (stcb) {
 2272                         return (stcb);
 2273                 }
 2274         }
 2275         find_tcp_pool = 0;
 2276         if ((ch->chunk_type != SCTP_INITIATION) &&
 2277             (ch->chunk_type != SCTP_INITIATION_ACK) &&
 2278             (ch->chunk_type != SCTP_COOKIE_ACK) &&
 2279             (ch->chunk_type != SCTP_COOKIE_ECHO)) {
 2280                 /* Other chunk types go to the tcp pool. */
 2281                 find_tcp_pool = 1;
 2282         }
 2283         if (inp_p) {
 2284                 stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp,
 2285                     find_tcp_pool, vrf_id);
 2286                 inp = *inp_p;
 2287         } else {
 2288                 stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp,
 2289                     find_tcp_pool, vrf_id);
 2290         }
 2291         SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp);
 2292         if (stcb == NULL && inp) {
 2293                 /* Found a EP but not this address */
 2294                 if ((ch->chunk_type == SCTP_INITIATION) ||
 2295                     (ch->chunk_type == SCTP_INITIATION_ACK)) {
 2296                         /*-
 2297                          * special hook, we do NOT return linp or an
 2298                          * association that is linked to an existing
 2299                          * association that is under the TCP pool (i.e. no
 2300                          * listener exists). The endpoint finding routine
 2301                          * will always find a listener before examining the
 2302                          * TCP pool.
 2303                          */
 2304                         if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
 2305                                 if (inp_p) {
 2306                                         *inp_p = NULL;
 2307                                 }
 2308                                 return (NULL);
 2309                         }
 2310                         stcb = sctp_findassociation_special_addr(m,
 2311                             offset, sh, &inp, netp, dst);
 2312                         if (inp_p != NULL) {
 2313                                 *inp_p = inp;
 2314                         }
 2315                 }
 2316         }
 2317         SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb);
 2318         return (stcb);
 2319 }
 2320 
 2321 /*
 2322  * lookup an association by an ASCONF lookup address.
 2323  * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup
 2324  */
 2325 struct sctp_tcb *
 2326 sctp_findassociation_ep_asconf(struct mbuf *m, int offset,
 2327     struct sockaddr *dst, struct sctphdr *sh,
 2328     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
 2329 {
 2330         struct sctp_tcb *stcb;
 2331         struct sockaddr_storage remote_store;
 2332         struct sctp_paramhdr parm_buf, *phdr;
 2333         int ptype;
 2334         int zero_address = 0;
 2335 
 2336 #ifdef INET
 2337         struct sockaddr_in *sin;
 2338 
 2339 #endif
 2340 #ifdef INET6
 2341         struct sockaddr_in6 *sin6;
 2342 
 2343 #endif
 2344 
 2345         memset(&remote_store, 0, sizeof(remote_store));
 2346         phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk),
 2347             &parm_buf, sizeof(struct sctp_paramhdr));
 2348         if (phdr == NULL) {
 2349                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n",
 2350                     __FUNCTION__);
 2351                 return NULL;
 2352         }
 2353         ptype = (int)((uint32_t) ntohs(phdr->param_type));
 2354         /* get the correlation address */
 2355         switch (ptype) {
 2356 #ifdef INET6
 2357         case SCTP_IPV6_ADDRESS:
 2358                 {
 2359                         /* ipv6 address param */
 2360                         struct sctp_ipv6addr_param *p6, p6_buf;
 2361 
 2362                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) {
 2363                                 return NULL;
 2364                         }
 2365                         p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m,
 2366                             offset + sizeof(struct sctp_asconf_chunk),
 2367                             &p6_buf.ph, sizeof(*p6));
 2368                         if (p6 == NULL) {
 2369                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n",
 2370                                     __FUNCTION__);
 2371                                 return (NULL);
 2372                         }
 2373                         sin6 = (struct sockaddr_in6 *)&remote_store;
 2374                         sin6->sin6_family = AF_INET6;
 2375                         sin6->sin6_len = sizeof(*sin6);
 2376                         sin6->sin6_port = sh->src_port;
 2377                         memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr));
 2378                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
 2379                                 zero_address = 1;
 2380                         break;
 2381                 }
 2382 #endif
 2383 #ifdef INET
 2384         case SCTP_IPV4_ADDRESS:
 2385                 {
 2386                         /* ipv4 address param */
 2387                         struct sctp_ipv4addr_param *p4, p4_buf;
 2388 
 2389                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) {
 2390                                 return NULL;
 2391                         }
 2392                         p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m,
 2393                             offset + sizeof(struct sctp_asconf_chunk),
 2394                             &p4_buf.ph, sizeof(*p4));
 2395                         if (p4 == NULL) {
 2396                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n",
 2397                                     __FUNCTION__);
 2398                                 return (NULL);
 2399                         }
 2400                         sin = (struct sockaddr_in *)&remote_store;
 2401                         sin->sin_family = AF_INET;
 2402                         sin->sin_len = sizeof(*sin);
 2403                         sin->sin_port = sh->src_port;
 2404                         memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr));
 2405                         if (sin->sin_addr.s_addr == INADDR_ANY)
 2406                                 zero_address = 1;
 2407                         break;
 2408                 }
 2409 #endif
 2410         default:
 2411                 /* invalid address param type */
 2412                 return NULL;
 2413         }
 2414 
 2415         if (zero_address) {
 2416                 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p,
 2417                     netp, sh->src_port, sh->dest_port, 1, vrf_id, 0);
 2418                 if (stcb != NULL) {
 2419                         SCTP_INP_DECR_REF(*inp_p);
 2420                 }
 2421         } else {
 2422                 stcb = sctp_findassociation_ep_addr(inp_p,
 2423                     (struct sockaddr *)&remote_store, netp,
 2424                     dst, NULL);
 2425         }
 2426         return (stcb);
 2427 }
 2428 
 2429 
 2430 /*
 2431  * allocate a sctp_inpcb and setup a temporary binding to a port/all
 2432  * addresses. This way if we don't get a bind we by default pick a ephemeral
 2433  * port with all addresses bound.
 2434  */
 2435 int
 2436 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id)
 2437 {
 2438         /*
 2439          * we get called when a new endpoint starts up. We need to allocate
 2440          * the sctp_inpcb structure from the zone and init it. Mark it as
 2441          * unbound and find a port that we can use as an ephemeral with
 2442          * INADDR_ANY. If the user binds later no problem we can then add in
 2443          * the specific addresses. And setup the default parameters for the
 2444          * EP.
 2445          */
 2446         int i, error;
 2447         struct sctp_inpcb *inp;
 2448         struct sctp_pcb *m;
 2449         struct timeval time;
 2450         sctp_sharedkey_t *null_key;
 2451 
 2452         error = 0;
 2453 
 2454         SCTP_INP_INFO_WLOCK();
 2455         inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb);
 2456         if (inp == NULL) {
 2457                 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n");
 2458                 SCTP_INP_INFO_WUNLOCK();
 2459                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
 2460                 return (ENOBUFS);
 2461         }
 2462         /* zap it */
 2463         bzero(inp, sizeof(*inp));
 2464 
 2465         /* bump generations */
 2466         /* setup socket pointers */
 2467         inp->sctp_socket = so;
 2468         inp->ip_inp.inp.inp_socket = so;
 2469         inp->ip_inp.inp.inp_cred = crhold(so->so_cred);
 2470 #ifdef INET6
 2471         if (INP_SOCKAF(so) == AF_INET6) {
 2472                 if (MODULE_GLOBAL(ip6_auto_flowlabel)) {
 2473                         inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL;
 2474                 }
 2475                 if (MODULE_GLOBAL(ip6_v6only)) {
 2476                         inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY;
 2477                 }
 2478         }
 2479 #endif
 2480         inp->sctp_associd_counter = 1;
 2481         inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT;
 2482         inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT;
 2483         inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off);
 2484         inp->sctp_ecn_enable = SCTP_BASE_SYSCTL(sctp_ecn_enable);
 2485         /* init the small hash table we use to track asocid <-> tcb */
 2486         inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark);
 2487         if (inp->sctp_asocidhash == NULL) {
 2488                 crfree(inp->ip_inp.inp.inp_cred);
 2489                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
 2490                 SCTP_INP_INFO_WUNLOCK();
 2491                 return (ENOBUFS);
 2492         }
 2493 #ifdef IPSEC
 2494         {
 2495                 struct inpcbpolicy *pcb_sp = NULL;
 2496 
 2497                 error = ipsec_init_policy(so, &pcb_sp);
 2498                 /* Arrange to share the policy */
 2499                 inp->ip_inp.inp.inp_sp = pcb_sp;
 2500                 ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp;
 2501         }
 2502         if (error != 0) {
 2503                 crfree(inp->ip_inp.inp.inp_cred);
 2504                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
 2505                 SCTP_INP_INFO_WUNLOCK();
 2506                 return error;
 2507         }
 2508 #endif                          /* IPSEC */
 2509         SCTP_INCR_EP_COUNT();
 2510         inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl);
 2511         SCTP_INP_INFO_WUNLOCK();
 2512 
 2513         so->so_pcb = (caddr_t)inp;
 2514 
 2515         if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) {
 2516                 /* UDP style socket */
 2517                 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
 2518                     SCTP_PCB_FLAGS_UNBOUND);
 2519                 /* Be sure it is NON-BLOCKING IO for UDP */
 2520                 /* SCTP_SET_SO_NBIO(so); */
 2521         } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) {
 2522                 /* TCP style socket */
 2523                 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
 2524                     SCTP_PCB_FLAGS_UNBOUND);
 2525                 /* Be sure we have blocking IO by default */
 2526                 SCTP_CLEAR_SO_NBIO(so);
 2527         } else {
 2528                 /*
 2529                  * unsupported socket type (RAW, etc)- in case we missed it
 2530                  * in protosw
 2531                  */
 2532                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP);
 2533                 so->so_pcb = NULL;
 2534                 crfree(inp->ip_inp.inp.inp_cred);
 2535                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
 2536                 return (EOPNOTSUPP);
 2537         }
 2538         if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) {
 2539                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
 2540                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
 2541         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) {
 2542                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
 2543                 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
 2544         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) {
 2545                 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
 2546                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
 2547         }
 2548         inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize),
 2549             &inp->sctp_hashmark);
 2550         if (inp->sctp_tcbhash == NULL) {
 2551                 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n");
 2552                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
 2553                 so->so_pcb = NULL;
 2554                 crfree(inp->ip_inp.inp.inp_cred);
 2555                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
 2556                 return (ENOBUFS);
 2557         }
 2558         inp->def_vrf_id = vrf_id;
 2559 
 2560         SCTP_INP_INFO_WLOCK();
 2561         SCTP_INP_LOCK_INIT(inp);
 2562         INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp");
 2563         SCTP_INP_READ_INIT(inp);
 2564         SCTP_ASOC_CREATE_LOCK_INIT(inp);
 2565         /* lock the new ep */
 2566         SCTP_INP_WLOCK(inp);
 2567 
 2568         /* add it to the info area */
 2569         LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list);
 2570         SCTP_INP_INFO_WUNLOCK();
 2571 
 2572         TAILQ_INIT(&inp->read_queue);
 2573         LIST_INIT(&inp->sctp_addr_list);
 2574 
 2575         LIST_INIT(&inp->sctp_asoc_list);
 2576 
 2577 #ifdef SCTP_TRACK_FREED_ASOCS
 2578         /* TEMP CODE */
 2579         LIST_INIT(&inp->sctp_asoc_free_list);
 2580 #endif
 2581         /* Init the timer structure for signature change */
 2582         SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer);
 2583         inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE;
 2584 
 2585         /* now init the actual endpoint default data */
 2586         m = &inp->sctp_ep;
 2587 
 2588         /* setup the base timeout information */
 2589         m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC);    /* needed ? */
 2590         m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC);    /* needed ? */
 2591         m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default));
 2592         m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default));
 2593         m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default));
 2594         m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default));
 2595         m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default));
 2596         /* all max/min max are in ms */
 2597         m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default);
 2598         m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default);
 2599         m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default);
 2600         m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default);
 2601         m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default);
 2602         m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default);
 2603         m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default);
 2604         m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default);
 2605         m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold);
 2606         m->sctp_sws_sender = SCTP_SWS_SENDER_DEF;
 2607         m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF;
 2608         m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default);
 2609         m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default);
 2610 
 2611         m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module);
 2612         m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module);
 2613         m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default);
 2614         /* number of streams to pre-open on a association */
 2615         m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default);
 2616 
 2617         /* Add adaptation cookie */
 2618         m->adaptation_layer_indicator = 0;
 2619         m->adaptation_layer_indicator_provided = 0;
 2620 
 2621         /* seed random number generator */
 2622         m->random_counter = 1;
 2623         m->store_at = SCTP_SIGNATURE_SIZE;
 2624         SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers));
 2625         sctp_fill_random_store(m);
 2626 
 2627         /* Minimum cookie size */
 2628         m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) +
 2629             sizeof(struct sctp_state_cookie);
 2630         m->size_of_a_cookie += SCTP_SIGNATURE_SIZE;
 2631 
 2632         /* Setup the initial secret */
 2633         (void)SCTP_GETTIME_TIMEVAL(&time);
 2634         m->time_of_secret_change = time.tv_sec;
 2635 
 2636         for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
 2637                 m->secret_key[0][i] = sctp_select_initial_TSN(m);
 2638         }
 2639         sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
 2640 
 2641         /* How long is a cookie good for ? */
 2642         m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default));
 2643         /*
 2644          * Initialize authentication parameters
 2645          */
 2646         m->local_hmacs = sctp_default_supported_hmaclist();
 2647         m->local_auth_chunks = sctp_alloc_chunklist();
 2648         m->default_dscp = 0;
 2649 #ifdef INET6
 2650         m->default_flowlabel = 0;
 2651 #endif
 2652         m->port = 0;            /* encapsulation disabled by default */
 2653         sctp_auth_set_default_chunks(m->local_auth_chunks);
 2654         LIST_INIT(&m->shared_keys);
 2655         /* add default NULL key as key id 0 */
 2656         null_key = sctp_alloc_sharedkey();
 2657         sctp_insert_sharedkey(&m->shared_keys, null_key);
 2658         SCTP_INP_WUNLOCK(inp);
 2659 #ifdef SCTP_LOG_CLOSING
 2660         sctp_log_closing(inp, NULL, 12);
 2661 #endif
 2662         return (error);
 2663 }
 2664 
 2665 
 2666 void
 2667 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp,
 2668     struct sctp_tcb *stcb)
 2669 {
 2670         struct sctp_nets *net;
 2671         uint16_t lport, rport;
 2672         struct sctppcbhead *head;
 2673         struct sctp_laddr *laddr, *oladdr;
 2674 
 2675         atomic_add_int(&stcb->asoc.refcnt, 1);
 2676         SCTP_TCB_UNLOCK(stcb);
 2677         SCTP_INP_INFO_WLOCK();
 2678         SCTP_INP_WLOCK(old_inp);
 2679         SCTP_INP_WLOCK(new_inp);
 2680         SCTP_TCB_LOCK(stcb);
 2681         atomic_subtract_int(&stcb->asoc.refcnt, 1);
 2682 
 2683         new_inp->sctp_ep.time_of_secret_change =
 2684             old_inp->sctp_ep.time_of_secret_change;
 2685         memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key,
 2686             sizeof(old_inp->sctp_ep.secret_key));
 2687         new_inp->sctp_ep.current_secret_number =
 2688             old_inp->sctp_ep.current_secret_number;
 2689         new_inp->sctp_ep.last_secret_number =
 2690             old_inp->sctp_ep.last_secret_number;
 2691         new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie;
 2692 
 2693         /* make it so new data pours into the new socket */
 2694         stcb->sctp_socket = new_inp->sctp_socket;
 2695         stcb->sctp_ep = new_inp;
 2696 
 2697         /* Copy the port across */
 2698         lport = new_inp->sctp_lport = old_inp->sctp_lport;
 2699         rport = stcb->rport;
 2700         /* Pull the tcb from the old association */
 2701         LIST_REMOVE(stcb, sctp_tcbhash);
 2702         LIST_REMOVE(stcb, sctp_tcblist);
 2703         if (stcb->asoc.in_asocid_hash) {
 2704                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
 2705         }
 2706         /* Now insert the new_inp into the TCP connected hash */
 2707         head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
 2708 
 2709         LIST_INSERT_HEAD(head, new_inp, sctp_hash);
 2710         /* Its safe to access */
 2711         new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
 2712 
 2713         /* Now move the tcb into the endpoint list */
 2714         LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist);
 2715         /*
 2716          * Question, do we even need to worry about the ep-hash since we
 2717          * only have one connection? Probably not :> so lets get rid of it
 2718          * and not suck up any kernel memory in that.
 2719          */
 2720         if (stcb->asoc.in_asocid_hash) {
 2721                 struct sctpasochead *lhd;
 2722 
 2723                 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id,
 2724                     new_inp->hashasocidmark)];
 2725                 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash);
 2726         }
 2727         /* Ok. Let's restart timer. */
 2728         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 2729                 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp,
 2730                     stcb, net);
 2731         }
 2732 
 2733         SCTP_INP_INFO_WUNLOCK();
 2734         if (new_inp->sctp_tcbhash != NULL) {
 2735                 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark);
 2736                 new_inp->sctp_tcbhash = NULL;
 2737         }
 2738         if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
 2739                 /* Subset bound, so copy in the laddr list from the old_inp */
 2740                 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) {
 2741                         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
 2742                         if (laddr == NULL) {
 2743                                 /*
 2744                                  * Gak, what can we do? This assoc is really
 2745                                  * HOSED. We probably should send an abort
 2746                                  * here.
 2747                                  */
 2748                                 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n");
 2749                                 continue;
 2750                         }
 2751                         SCTP_INCR_LADDR_COUNT();
 2752                         bzero(laddr, sizeof(*laddr));
 2753                         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
 2754                         laddr->ifa = oladdr->ifa;
 2755                         atomic_add_int(&laddr->ifa->refcount, 1);
 2756                         LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr,
 2757                             sctp_nxt_addr);
 2758                         new_inp->laddr_count++;
 2759                         if (oladdr == stcb->asoc.last_used_address) {
 2760                                 stcb->asoc.last_used_address = laddr;
 2761                         }
 2762                 }
 2763         }
 2764         /*
 2765          * Now any running timers need to be adjusted since we really don't
 2766          * care if they are running or not just blast in the new_inp into
 2767          * all of them.
 2768          */
 2769 
 2770         stcb->asoc.dack_timer.ep = (void *)new_inp;
 2771         stcb->asoc.asconf_timer.ep = (void *)new_inp;
 2772         stcb->asoc.strreset_timer.ep = (void *)new_inp;
 2773         stcb->asoc.shut_guard_timer.ep = (void *)new_inp;
 2774         stcb->asoc.autoclose_timer.ep = (void *)new_inp;
 2775         stcb->asoc.delayed_event_timer.ep = (void *)new_inp;
 2776         stcb->asoc.delete_prim_timer.ep = (void *)new_inp;
 2777         /* now what about the nets? */
 2778         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 2779                 net->pmtu_timer.ep = (void *)new_inp;
 2780                 net->hb_timer.ep = (void *)new_inp;
 2781                 net->rxt_timer.ep = (void *)new_inp;
 2782         }
 2783         SCTP_INP_WUNLOCK(new_inp);
 2784         SCTP_INP_WUNLOCK(old_inp);
 2785 }
 2786 
 2787 
 2788 
 2789 
 2790 /* sctp_ifap is used to bypass normal local address validation checks */
 2791 int
 2792 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr,
 2793     struct sctp_ifa *sctp_ifap, struct thread *p)
 2794 {
 2795         /* bind a ep to a socket address */
 2796         struct sctppcbhead *head;
 2797         struct sctp_inpcb *inp, *inp_tmp;
 2798         struct inpcb *ip_inp;
 2799         int port_reuse_active = 0;
 2800         int bindall;
 2801         uint16_t lport;
 2802         int error;
 2803         uint32_t vrf_id;
 2804 
 2805         lport = 0;
 2806         bindall = 1;
 2807         inp = (struct sctp_inpcb *)so->so_pcb;
 2808         ip_inp = (struct inpcb *)so->so_pcb;
 2809 #ifdef SCTP_DEBUG
 2810         if (addr) {
 2811                 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n",
 2812                     ntohs(((struct sockaddr_in *)addr)->sin_port));
 2813                 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: ");
 2814                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
 2815         }
 2816 #endif
 2817         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
 2818                 /* already did a bind, subsequent binds NOT allowed ! */
 2819                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
 2820                 return (EINVAL);
 2821         }
 2822 #ifdef INVARIANTS
 2823         if (p == NULL)
 2824                 panic("null proc/thread");
 2825 #endif
 2826         if (addr != NULL) {
 2827                 switch (addr->sa_family) {
 2828 #ifdef INET
 2829                 case AF_INET:
 2830                         {
 2831                                 struct sockaddr_in *sin;
 2832 
 2833                                 /* IPV6_V6ONLY socket? */
 2834                                 if (SCTP_IPV6_V6ONLY(ip_inp)) {
 2835                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
 2836                                         return (EINVAL);
 2837                                 }
 2838                                 if (addr->sa_len != sizeof(*sin)) {
 2839                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
 2840                                         return (EINVAL);
 2841                                 }
 2842                                 sin = (struct sockaddr_in *)addr;
 2843                                 lport = sin->sin_port;
 2844                                 /*
 2845                                  * For LOOPBACK the prison_local_ip4() call
 2846                                  * will transmute the ip address to the
 2847                                  * proper value.
 2848                                  */
 2849                                 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) {
 2850                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
 2851                                         return (error);
 2852                                 }
 2853                                 if (sin->sin_addr.s_addr != INADDR_ANY) {
 2854                                         bindall = 0;
 2855                                 }
 2856                                 break;
 2857                         }
 2858 #endif
 2859 #ifdef INET6
 2860                 case AF_INET6:
 2861                         {
 2862                                 /*
 2863                                  * Only for pure IPv6 Address. (No IPv4
 2864                                  * Mapped!)
 2865                                  */
 2866                                 struct sockaddr_in6 *sin6;
 2867 
 2868                                 sin6 = (struct sockaddr_in6 *)addr;
 2869 
 2870                                 if (addr->sa_len != sizeof(*sin6)) {
 2871                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
 2872                                         return (EINVAL);
 2873                                 }
 2874                                 lport = sin6->sin6_port;
 2875                                 /*
 2876                                  * For LOOPBACK the prison_local_ip6() call
 2877                                  * will transmute the ipv6 address to the
 2878                                  * proper value.
 2879                                  */
 2880                                 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr,
 2881                                     (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) {
 2882                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
 2883                                         return (error);
 2884                                 }
 2885                                 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
 2886                                         bindall = 0;
 2887                                         /* KAME hack: embed scopeid */
 2888                                         if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
 2889                                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
 2890                                                 return (EINVAL);
 2891                                         }
 2892                                 }
 2893                                 /* this must be cleared for ifa_ifwithaddr() */
 2894                                 sin6->sin6_scope_id = 0;
 2895                                 break;
 2896                         }
 2897 #endif
 2898                 default:
 2899                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT);
 2900                         return (EAFNOSUPPORT);
 2901                 }
 2902         }
 2903         SCTP_INP_INFO_WLOCK();
 2904         SCTP_INP_WLOCK(inp);
 2905         /* Setup a vrf_id to be the default for the non-bind-all case. */
 2906         vrf_id = inp->def_vrf_id;
 2907 
 2908         /* increase our count due to the unlock we do */
 2909         SCTP_INP_INCR_REF(inp);
 2910         if (lport) {
 2911                 /*
 2912                  * Did the caller specify a port? if so we must see if an ep
 2913                  * already has this one bound.
 2914                  */
 2915                 /* got to be root to get at low ports */
 2916                 if (ntohs(lport) < IPPORT_RESERVED) {
 2917                         if (p && (error =
 2918                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
 2919                             )) {
 2920                                 SCTP_INP_DECR_REF(inp);
 2921                                 SCTP_INP_WUNLOCK(inp);
 2922                                 SCTP_INP_INFO_WUNLOCK();
 2923                                 return (error);
 2924                         }
 2925                 }
 2926                 SCTP_INP_WUNLOCK(inp);
 2927                 if (bindall) {
 2928                         vrf_id = inp->def_vrf_id;
 2929                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
 2930                         if (inp_tmp != NULL) {
 2931                                 /*
 2932                                  * lock guy returned and lower count note
 2933                                  * that we are not bound so inp_tmp should
 2934                                  * NEVER be inp. And it is this inp
 2935                                  * (inp_tmp) that gets the reference bump,
 2936                                  * so we must lower it.
 2937                                  */
 2938                                 SCTP_INP_DECR_REF(inp_tmp);
 2939                                 /* unlock info */
 2940                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
 2941                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
 2942                                         /*
 2943                                          * Ok, must be one-2-one and
 2944                                          * allowing port re-use
 2945                                          */
 2946                                         port_reuse_active = 1;
 2947                                         goto continue_anyway;
 2948                                 }
 2949                                 SCTP_INP_DECR_REF(inp);
 2950                                 SCTP_INP_INFO_WUNLOCK();
 2951                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
 2952                                 return (EADDRINUSE);
 2953                         }
 2954                 } else {
 2955                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
 2956                         if (inp_tmp != NULL) {
 2957                                 /*
 2958                                  * lock guy returned and lower count note
 2959                                  * that we are not bound so inp_tmp should
 2960                                  * NEVER be inp. And it is this inp
 2961                                  * (inp_tmp) that gets the reference bump,
 2962                                  * so we must lower it.
 2963                                  */
 2964                                 SCTP_INP_DECR_REF(inp_tmp);
 2965                                 /* unlock info */
 2966                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
 2967                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
 2968                                         /*
 2969                                          * Ok, must be one-2-one and
 2970                                          * allowing port re-use
 2971                                          */
 2972                                         port_reuse_active = 1;
 2973                                         goto continue_anyway;
 2974                                 }
 2975                                 SCTP_INP_DECR_REF(inp);
 2976                                 SCTP_INP_INFO_WUNLOCK();
 2977                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
 2978                                 return (EADDRINUSE);
 2979                         }
 2980                 }
 2981 continue_anyway:
 2982                 SCTP_INP_WLOCK(inp);
 2983                 if (bindall) {
 2984                         /* verify that no lport is not used by a singleton */
 2985                         if ((port_reuse_active == 0) &&
 2986                             (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) {
 2987                                 /* Sorry someone already has this one bound */
 2988                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
 2989                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
 2990                                         port_reuse_active = 1;
 2991                                 } else {
 2992                                         SCTP_INP_DECR_REF(inp);
 2993                                         SCTP_INP_WUNLOCK(inp);
 2994                                         SCTP_INP_INFO_WUNLOCK();
 2995                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
 2996                                         return (EADDRINUSE);
 2997                                 }
 2998                         }
 2999                 }
 3000         } else {
 3001                 uint16_t first, last, candidate;
 3002                 uint16_t count;
 3003                 int done;
 3004 
 3005                 if (ip_inp->inp_flags & INP_HIGHPORT) {
 3006                         first = MODULE_GLOBAL(ipport_hifirstauto);
 3007                         last = MODULE_GLOBAL(ipport_hilastauto);
 3008                 } else if (ip_inp->inp_flags & INP_LOWPORT) {
 3009                         if (p && (error =
 3010                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
 3011                             )) {
 3012                                 SCTP_INP_DECR_REF(inp);
 3013                                 SCTP_INP_WUNLOCK(inp);
 3014                                 SCTP_INP_INFO_WUNLOCK();
 3015                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
 3016                                 return (error);
 3017                         }
 3018                         first = MODULE_GLOBAL(ipport_lowfirstauto);
 3019                         last = MODULE_GLOBAL(ipport_lowlastauto);
 3020                 } else {
 3021                         first = MODULE_GLOBAL(ipport_firstauto);
 3022                         last = MODULE_GLOBAL(ipport_lastauto);
 3023                 }
 3024                 if (first > last) {
 3025                         uint16_t temp;
 3026 
 3027                         temp = first;
 3028                         first = last;
 3029                         last = temp;
 3030                 }
 3031                 count = last - first + 1;       /* number of candidates */
 3032                 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count);
 3033 
 3034                 done = 0;
 3035                 while (!done) {
 3036                         if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) {
 3037                                 done = 1;
 3038                         }
 3039                         if (!done) {
 3040                                 if (--count == 0) {
 3041                                         SCTP_INP_DECR_REF(inp);
 3042                                         SCTP_INP_WUNLOCK(inp);
 3043                                         SCTP_INP_INFO_WUNLOCK();
 3044                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
 3045                                         return (EADDRINUSE);
 3046                                 }
 3047                                 if (candidate == last)
 3048                                         candidate = first;
 3049                                 else
 3050                                         candidate = candidate + 1;
 3051                         }
 3052                 }
 3053                 lport = htons(candidate);
 3054         }
 3055         SCTP_INP_DECR_REF(inp);
 3056         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
 3057             SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
 3058                 /*
 3059                  * this really should not happen. The guy did a non-blocking
 3060                  * bind and then did a close at the same time.
 3061                  */
 3062                 SCTP_INP_WUNLOCK(inp);
 3063                 SCTP_INP_INFO_WUNLOCK();
 3064                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
 3065                 return (EINVAL);
 3066         }
 3067         /* ok we look clear to give out this port, so lets setup the binding */
 3068         if (bindall) {
 3069                 /* binding to all addresses, so just set in the proper flags */
 3070                 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL;
 3071                 /* set the automatic addr changes from kernel flag */
 3072                 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) {
 3073                         sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF);
 3074                         sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
 3075                 } else {
 3076                         sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
 3077                         sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
 3078                 }
 3079                 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) {
 3080                         sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
 3081                 } else {
 3082                         sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
 3083                 }
 3084                 /*
 3085                  * set the automatic mobility_base from kernel flag (by
 3086                  * micchie)
 3087                  */
 3088                 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) {
 3089                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE);
 3090                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
 3091                 } else {
 3092                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE);
 3093                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
 3094                 }
 3095                 /*
 3096                  * set the automatic mobility_fasthandoff from kernel flag
 3097                  * (by micchie)
 3098                  */
 3099                 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) {
 3100                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF);
 3101                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
 3102                 } else {
 3103                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF);
 3104                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
 3105                 }
 3106         } else {
 3107                 /*
 3108                  * bind specific, make sure flags is off and add a new
 3109                  * address structure to the sctp_addr_list inside the ep
 3110                  * structure.
 3111                  * 
 3112                  * We will need to allocate one and insert it at the head. The
 3113                  * socketopt call can just insert new addresses in there as
 3114                  * well. It will also have to do the embed scope kame hack
 3115                  * too (before adding).
 3116                  */
 3117                 struct sctp_ifa *ifa;
 3118                 struct sockaddr_storage store_sa;
 3119 
 3120                 memset(&store_sa, 0, sizeof(store_sa));
 3121                 switch (addr->sa_family) {
 3122 #ifdef INET
 3123                 case AF_INET:
 3124                         {
 3125                                 struct sockaddr_in *sin;
 3126 
 3127                                 sin = (struct sockaddr_in *)&store_sa;
 3128                                 memcpy(sin, addr, sizeof(struct sockaddr_in));
 3129                                 sin->sin_port = 0;
 3130                                 break;
 3131                         }
 3132 #endif
 3133 #ifdef INET6
 3134                 case AF_INET6:
 3135                         {
 3136                                 struct sockaddr_in6 *sin6;
 3137 
 3138                                 sin6 = (struct sockaddr_in6 *)&store_sa;
 3139                                 memcpy(sin6, addr, sizeof(struct sockaddr_in6));
 3140                                 sin6->sin6_port = 0;
 3141                                 break;
 3142                         }
 3143 #endif
 3144                 default:
 3145                         break;
 3146                 }
 3147                 /*
 3148                  * first find the interface with the bound address need to
 3149                  * zero out the port to find the address! yuck! can't do
 3150                  * this earlier since need port for sctp_pcb_findep()
 3151                  */
 3152                 if (sctp_ifap != NULL) {
 3153                         ifa = sctp_ifap;
 3154                 } else {
 3155                         /*
 3156                          * Note for BSD we hit here always other O/S's will
 3157                          * pass things in via the sctp_ifap argument
 3158                          * (Panda).
 3159                          */
 3160                         ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa,
 3161                             vrf_id, SCTP_ADDR_NOT_LOCKED);
 3162                 }
 3163                 if (ifa == NULL) {
 3164                         /* Can't find an interface with that address */
 3165                         SCTP_INP_WUNLOCK(inp);
 3166                         SCTP_INP_INFO_WUNLOCK();
 3167                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL);
 3168                         return (EADDRNOTAVAIL);
 3169                 }
 3170 #ifdef INET6
 3171                 if (addr->sa_family == AF_INET6) {
 3172                         /* GAK, more FIXME IFA lock? */
 3173                         if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
 3174                                 /* Can't bind a non-existent addr. */
 3175                                 SCTP_INP_WUNLOCK(inp);
 3176                                 SCTP_INP_INFO_WUNLOCK();
 3177                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
 3178                                 return (EINVAL);
 3179                         }
 3180                 }
 3181 #endif
 3182                 /* we're not bound all */
 3183                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
 3184                 /* allow bindx() to send ASCONF's for binding changes */
 3185                 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
 3186                 /* clear automatic addr changes from kernel flag */
 3187                 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
 3188 
 3189                 /* add this address to the endpoint list */
 3190                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0);
 3191                 if (error != 0) {
 3192                         SCTP_INP_WUNLOCK(inp);
 3193                         SCTP_INP_INFO_WUNLOCK();
 3194                         return (error);
 3195                 }
 3196                 inp->laddr_count++;
 3197         }
 3198         /* find the bucket */
 3199         if (port_reuse_active) {
 3200                 /* Put it into tcp 1-2-1 hash */
 3201                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))];
 3202                 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
 3203         } else {
 3204                 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))];
 3205         }
 3206         /* put it in the bucket */
 3207         LIST_INSERT_HEAD(head, inp, sctp_hash);
 3208         SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n",
 3209             (void *)head, ntohs(lport), port_reuse_active);
 3210         /* set in the port */
 3211         inp->sctp_lport = lport;
 3212 
 3213         /* turn off just the unbound flag */
 3214         inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
 3215         SCTP_INP_WUNLOCK(inp);
 3216         SCTP_INP_INFO_WUNLOCK();
 3217         return (0);
 3218 }
 3219 
 3220 
 3221 static void
 3222 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp)
 3223 {
 3224         struct sctp_iterator *it, *nit;
 3225 
 3226         /*
 3227          * We enter with the only the ITERATOR_LOCK in place and a write
 3228          * lock on the inp_info stuff.
 3229          */
 3230         it = sctp_it_ctl.cur_it;
 3231         if (it && (it->vn != curvnet)) {
 3232                 /* Its not looking at our VNET */
 3233                 return;
 3234         }
 3235         if (it && (it->inp == inp)) {
 3236                 /*
 3237                  * This is tricky and we hold the iterator lock, but when it
 3238                  * returns and gets the lock (when we release it) the
 3239                  * iterator will try to operate on inp. We need to stop that
 3240                  * from happening. But of course the iterator has a
 3241                  * reference on the stcb and inp. We can mark it and it will
 3242                  * stop.
 3243                  * 
 3244                  * If its a single iterator situation, we set the end iterator
 3245                  * flag. Otherwise we set the iterator to go to the next
 3246                  * inp.
 3247                  * 
 3248                  */
 3249                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
 3250                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
 3251                 } else {
 3252                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP;
 3253                 }
 3254         }
 3255         /*
 3256          * Now go through and remove any single reference to our inp that
 3257          * may be still pending on the list
 3258          */
 3259         SCTP_IPI_ITERATOR_WQ_LOCK();
 3260         TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
 3261                 if (it->vn != curvnet) {
 3262                         continue;
 3263                 }
 3264                 if (it->inp == inp) {
 3265                         /* This one points to me is it inp specific? */
 3266                         if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
 3267                                 /* Remove and free this one */
 3268                                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead,
 3269                                     it, sctp_nxt_itr);
 3270                                 if (it->function_atend != NULL) {
 3271                                         (*it->function_atend) (it->pointer, it->val);
 3272                                 }
 3273                                 SCTP_FREE(it, SCTP_M_ITER);
 3274                         } else {
 3275                                 it->inp = LIST_NEXT(it->inp, sctp_list);
 3276                                 if (it->inp) {
 3277                                         SCTP_INP_INCR_REF(it->inp);
 3278                                 }
 3279                         }
 3280                         /*
 3281                          * When its put in the refcnt is incremented so decr
 3282                          * it
 3283                          */
 3284                         SCTP_INP_DECR_REF(inp);
 3285                 }
 3286         }
 3287         SCTP_IPI_ITERATOR_WQ_UNLOCK();
 3288 }
 3289 
 3290 /* release sctp_inpcb unbind the port */
 3291 void
 3292 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from)
 3293 {
 3294         /*
 3295          * Here we free a endpoint. We must find it (if it is in the Hash
 3296          * table) and remove it from there. Then we must also find it in the
 3297          * overall list and remove it from there. After all removals are
 3298          * complete then any timer has to be stopped. Then start the actual
 3299          * freeing. a) Any local lists. b) Any associations. c) The hash of
 3300          * all associations. d) finally the ep itself.
 3301          */
 3302         struct sctp_tcb *asoc, *nasoc;
 3303         struct sctp_laddr *laddr, *nladdr;
 3304         struct inpcb *ip_pcb;
 3305         struct socket *so;
 3306         int being_refed = 0;
 3307         struct sctp_queued_to_read *sq, *nsq;
 3308         int cnt;
 3309         sctp_sharedkey_t *shared_key, *nshared_key;
 3310 
 3311 
 3312 #ifdef SCTP_LOG_CLOSING
 3313         sctp_log_closing(inp, NULL, 0);
 3314 #endif
 3315         SCTP_ITERATOR_LOCK();
 3316         /* mark any iterators on the list or being processed */
 3317         sctp_iterator_inp_being_freed(inp);
 3318         SCTP_ITERATOR_UNLOCK();
 3319         so = inp->sctp_socket;
 3320         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
 3321                 /* been here before.. eeks.. get out of here */
 3322                 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate);
 3323 #ifdef SCTP_LOG_CLOSING
 3324                 sctp_log_closing(inp, NULL, 1);
 3325 #endif
 3326                 return;
 3327         }
 3328         SCTP_ASOC_CREATE_LOCK(inp);
 3329         SCTP_INP_INFO_WLOCK();
 3330 
 3331         SCTP_INP_WLOCK(inp);
 3332         if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) {
 3333                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP;
 3334                 /* socket is gone, so no more wakeups allowed */
 3335                 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE;
 3336                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT;
 3337                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT;
 3338 
 3339         }
 3340         /* First time through we have the socket lock, after that no more. */
 3341         sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL,
 3342             SCTP_FROM_SCTP_PCB + SCTP_LOC_1);
 3343 
 3344         if (inp->control) {
 3345                 sctp_m_freem(inp->control);
 3346                 inp->control = NULL;
 3347         }
 3348         if (inp->pkt) {
 3349                 sctp_m_freem(inp->pkt);
 3350                 inp->pkt = NULL;
 3351         }
 3352         ip_pcb = &inp->ip_inp.inp;      /* we could just cast the main pointer
 3353                                          * here but I will be nice :> (i.e.
 3354                                          * ip_pcb = ep;) */
 3355         if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
 3356                 int cnt_in_sd;
 3357 
 3358                 cnt_in_sd = 0;
 3359                 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
 3360                         SCTP_TCB_LOCK(asoc);
 3361                         if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
 3362                                 /* Skip guys being freed */
 3363                                 cnt_in_sd++;
 3364                                 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
 3365                                         /*
 3366                                          * Special case - we did not start a
 3367                                          * kill timer on the asoc due to it
 3368                                          * was not closed. So go ahead and
 3369                                          * start it now.
 3370                                          */
 3371                                         asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
 3372                                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
 3373                                 }
 3374                                 SCTP_TCB_UNLOCK(asoc);
 3375                                 continue;
 3376                         }
 3377                         if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) ||
 3378                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) &&
 3379                             (asoc->asoc.total_output_queue_size == 0)) {
 3380                                 /*
 3381                                  * If we have data in queue, we don't want
 3382                                  * to just free since the app may have done,
 3383                                  * send()/close or connect/send/close. And
 3384                                  * it wants the data to get across first.
 3385                                  */
 3386                                 /* Just abandon things in the front states */
 3387                                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE,
 3388                                     SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) {
 3389                                         cnt_in_sd++;
 3390                                 }
 3391                                 continue;
 3392                         }
 3393                         /* Disconnect the socket please */
 3394                         asoc->sctp_socket = NULL;
 3395                         asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET;
 3396                         if ((asoc->asoc.size_on_reasm_queue > 0) ||
 3397                             (asoc->asoc.control_pdapi) ||
 3398                             (asoc->asoc.size_on_all_streams > 0) ||
 3399                             (so && (so->so_rcv.sb_cc > 0))) {
 3400                                 /* Left with Data unread */
 3401                                 struct mbuf *op_err;
 3402 
 3403                                 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
 3404                                 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3;
 3405                                 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
 3406                                 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
 3407                                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
 3408                                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
 3409                                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
 3410                                 }
 3411                                 if (sctp_free_assoc(inp, asoc,
 3412                                     SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) {
 3413                                         cnt_in_sd++;
 3414                                 }
 3415                                 continue;
 3416                         } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
 3417                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
 3418                             (asoc->asoc.stream_queue_cnt == 0)) {
 3419                                 if (asoc->asoc.locked_on_sending) {
 3420                                         goto abort_anyway;
 3421                                 }
 3422                                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
 3423                                     (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
 3424                                         struct sctp_nets *netp;
 3425 
 3426                                         /*
 3427                                          * there is nothing queued to send,
 3428                                          * so I send shutdown
 3429                                          */
 3430                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
 3431                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
 3432                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
 3433                                         }
 3434                                         SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT);
 3435                                         SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING);
 3436                                         sctp_stop_timers_for_shutdown(asoc);
 3437                                         if (asoc->asoc.alternate) {
 3438                                                 netp = asoc->asoc.alternate;
 3439                                         } else {
 3440                                                 netp = asoc->asoc.primary_destination;
 3441                                         }
 3442                                         sctp_send_shutdown(asoc, netp);
 3443                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
 3444                                             netp);
 3445                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
 3446                                             asoc->asoc.primary_destination);
 3447                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED);
 3448                                 }
 3449                         } else {
 3450                                 /* mark into shutdown pending */
 3451                                 struct sctp_stream_queue_pending *sp;
 3452 
 3453                                 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING;
 3454                                 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
 3455                                     asoc->asoc.primary_destination);
 3456                                 if (asoc->asoc.locked_on_sending) {
 3457                                         sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue),
 3458                                             sctp_streamhead);
 3459                                         if (sp == NULL) {
 3460                                                 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n",
 3461                                                     (void *)asoc->asoc.locked_on_sending,
 3462                                                     asoc->asoc.locked_on_sending->stream_no);
 3463                                         } else {
 3464                                                 if ((sp->length == 0) && (sp->msg_is_complete == 0))
 3465                                                         asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT;
 3466                                         }
 3467                                 }
 3468                                 if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
 3469                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
 3470                                     (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
 3471                                         struct mbuf *op_err;
 3472 
 3473                         abort_anyway:
 3474                                         op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
 3475                                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5;
 3476                                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
 3477                                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
 3478                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
 3479                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
 3480                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
 3481                                         }
 3482                                         if (sctp_free_assoc(inp, asoc,
 3483                                             SCTP_PCBFREE_NOFORCE,
 3484                                             SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) {
 3485                                                 cnt_in_sd++;
 3486                                         }
 3487                                         continue;
 3488                                 } else {
 3489                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED);
 3490                                 }
 3491                         }
 3492                         cnt_in_sd++;
 3493                         SCTP_TCB_UNLOCK(asoc);
 3494                 }
 3495                 /* now is there some left in our SHUTDOWN state? */
 3496                 if (cnt_in_sd) {
 3497 #ifdef SCTP_LOG_CLOSING
 3498                         sctp_log_closing(inp, NULL, 2);
 3499 #endif
 3500                         inp->sctp_socket = NULL;
 3501                         SCTP_INP_WUNLOCK(inp);
 3502                         SCTP_ASOC_CREATE_UNLOCK(inp);
 3503                         SCTP_INP_INFO_WUNLOCK();
 3504                         return;
 3505                 }
 3506         }
 3507         inp->sctp_socket = NULL;
 3508         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
 3509             SCTP_PCB_FLAGS_UNBOUND) {
 3510                 /*
 3511                  * ok, this guy has been bound. It's port is somewhere in
 3512                  * the SCTP_BASE_INFO(hash table). Remove it!
 3513                  */
 3514                 LIST_REMOVE(inp, sctp_hash);
 3515                 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND;
 3516         }
 3517         /*
 3518          * If there is a timer running to kill us, forget it, since it may
 3519          * have a contest on the INP lock.. which would cause us to die ...
 3520          */
 3521         cnt = 0;
 3522         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
 3523                 SCTP_TCB_LOCK(asoc);
 3524                 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
 3525                         if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
 3526                                 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
 3527                                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
 3528                         }
 3529                         cnt++;
 3530                         SCTP_TCB_UNLOCK(asoc);
 3531                         continue;
 3532                 }
 3533                 /* Free associations that are NOT killing us */
 3534                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) &&
 3535                     ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) {
 3536                         struct mbuf *op_err;
 3537 
 3538                         op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
 3539                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7;
 3540                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
 3541                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
 3542                 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
 3543                         cnt++;
 3544                         SCTP_TCB_UNLOCK(asoc);
 3545                         continue;
 3546                 }
 3547                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
 3548                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
 3549                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
 3550                 }
 3551                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) {
 3552                         cnt++;
 3553                 }
 3554         }
 3555         if (cnt) {
 3556                 /* Ok we have someone out there that will kill us */
 3557                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
 3558 #ifdef SCTP_LOG_CLOSING
 3559                 sctp_log_closing(inp, NULL, 3);
 3560 #endif
 3561                 SCTP_INP_WUNLOCK(inp);
 3562                 SCTP_ASOC_CREATE_UNLOCK(inp);
 3563                 SCTP_INP_INFO_WUNLOCK();
 3564                 return;
 3565         }
 3566         if (SCTP_INP_LOCK_CONTENDED(inp))
 3567                 being_refed++;
 3568         if (SCTP_INP_READ_CONTENDED(inp))
 3569                 being_refed++;
 3570         if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp))
 3571                 being_refed++;
 3572 
 3573         if ((inp->refcount) ||
 3574             (being_refed) ||
 3575             (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) {
 3576                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
 3577 #ifdef SCTP_LOG_CLOSING
 3578                 sctp_log_closing(inp, NULL, 4);
 3579 #endif
 3580                 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
 3581                 SCTP_INP_WUNLOCK(inp);
 3582                 SCTP_ASOC_CREATE_UNLOCK(inp);
 3583                 SCTP_INP_INFO_WUNLOCK();
 3584                 return;
 3585         }
 3586         inp->sctp_ep.signature_change.type = 0;
 3587         inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
 3588         /*
 3589          * Remove it from the list .. last thing we need a lock for.
 3590          */
 3591         LIST_REMOVE(inp, sctp_list);
 3592         SCTP_INP_WUNLOCK(inp);
 3593         SCTP_ASOC_CREATE_UNLOCK(inp);
 3594         SCTP_INP_INFO_WUNLOCK();
 3595         /*
 3596          * Now we release all locks. Since this INP cannot be found anymore
 3597          * except possibly by the kill timer that might be running. We call
 3598          * the drain function here. It should hit the case were it sees the
 3599          * ACTIVE flag cleared and exit out freeing us to proceed and
 3600          * destroy everything.
 3601          */
 3602         if (from != SCTP_CALLED_FROM_INPKILL_TIMER) {
 3603                 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer);
 3604         } else {
 3605                 /* Probably un-needed */
 3606                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
 3607         }
 3608 
 3609 #ifdef SCTP_LOG_CLOSING
 3610         sctp_log_closing(inp, NULL, 5);
 3611 #endif
 3612 
 3613 
 3614         if ((inp->sctp_asocidhash) != NULL) {
 3615                 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark);
 3616                 inp->sctp_asocidhash = NULL;
 3617         }
 3618         /* sa_ignore FREED_MEMORY */
 3619         TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) {
 3620                 /* Its only abandoned if it had data left */
 3621                 if (sq->length)
 3622                         SCTP_STAT_INCR(sctps_left_abandon);
 3623 
 3624                 TAILQ_REMOVE(&inp->read_queue, sq, next);
 3625                 sctp_free_remote_addr(sq->whoFrom);
 3626                 if (so)
 3627                         so->so_rcv.sb_cc -= sq->length;
 3628                 if (sq->data) {
 3629                         sctp_m_freem(sq->data);
 3630                         sq->data = NULL;
 3631                 }
 3632                 /*
 3633                  * no need to free the net count, since at this point all
 3634                  * assoc's are gone.
 3635                  */
 3636                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq);
 3637                 SCTP_DECR_READQ_COUNT();
 3638         }
 3639         /* Now the sctp_pcb things */
 3640         /*
 3641          * free each asoc if it is not already closed/free. we can't use the
 3642          * macro here since le_next will get freed as part of the
 3643          * sctp_free_assoc() call.
 3644          */
 3645         if (so) {
 3646 #ifdef IPSEC
 3647                 ipsec_delete_pcbpolicy(ip_pcb);
 3648 #endif                          /* IPSEC */
 3649 
 3650                 /* Unlocks not needed since the socket is gone now */
 3651         }
 3652         if (ip_pcb->inp_options) {
 3653                 (void)sctp_m_free(ip_pcb->inp_options);
 3654                 ip_pcb->inp_options = 0;
 3655         }
 3656 #ifdef INET6
 3657         if (ip_pcb->inp_vflag & INP_IPV6) {
 3658                 struct in6pcb *in6p;
 3659 
 3660                 in6p = (struct in6pcb *)inp;
 3661                 ip6_freepcbopts(in6p->in6p_outputopts);
 3662         }
 3663 #endif                          /* INET6 */
 3664         ip_pcb->inp_vflag = 0;
 3665         /* free up authentication fields */
 3666         if (inp->sctp_ep.local_auth_chunks != NULL)
 3667                 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
 3668         if (inp->sctp_ep.local_hmacs != NULL)
 3669                 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
 3670 
 3671         LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) {
 3672                 LIST_REMOVE(shared_key, next);
 3673                 sctp_free_sharedkey(shared_key);
 3674                 /* sa_ignore FREED_MEMORY */
 3675         }
 3676 
 3677         /*
 3678          * if we have an address list the following will free the list of
 3679          * ifaddr's that are set into this ep. Again macro limitations here,
 3680          * since the LIST_FOREACH could be a bad idea.
 3681          */
 3682         LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) {
 3683                 sctp_remove_laddr(laddr);
 3684         }
 3685 
 3686 #ifdef SCTP_TRACK_FREED_ASOCS
 3687         /* TEMP CODE */
 3688         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) {
 3689                 LIST_REMOVE(asoc, sctp_tcblist);
 3690                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc);
 3691                 SCTP_DECR_ASOC_COUNT();
 3692         }
 3693         /* *** END TEMP CODE *** */
 3694 #endif
 3695         /* Now lets see about freeing the EP hash table. */
 3696         if (inp->sctp_tcbhash != NULL) {
 3697                 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
 3698                 inp->sctp_tcbhash = NULL;
 3699         }
 3700         /* Now we must put the ep memory back into the zone pool */
 3701         crfree(inp->ip_inp.inp.inp_cred);
 3702         INP_LOCK_DESTROY(&inp->ip_inp.inp);
 3703         SCTP_INP_LOCK_DESTROY(inp);
 3704         SCTP_INP_READ_DESTROY(inp);
 3705         SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
 3706         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
 3707         SCTP_DECR_EP_COUNT();
 3708 }
 3709 
 3710 
 3711 struct sctp_nets *
 3712 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
 3713 {
 3714         struct sctp_nets *net;
 3715 
 3716         /* locate the address */
 3717         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 3718                 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
 3719                         return (net);
 3720         }
 3721         return (NULL);
 3722 }
 3723 
 3724 
 3725 int
 3726 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id)
 3727 {
 3728         struct sctp_ifa *sctp_ifa;
 3729 
 3730         sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED);
 3731         if (sctp_ifa) {
 3732                 return (1);
 3733         } else {
 3734                 return (0);
 3735         }
 3736 }
 3737 
 3738 /*
 3739  * add's a remote endpoint address, done with the INIT/INIT-ACK as well as
 3740  * when a ASCONF arrives that adds it. It will also initialize all the cwnd
 3741  * stats of stuff.
 3742  */
 3743 int
 3744 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
 3745     struct sctp_nets **netp, int set_scope, int from)
 3746 {
 3747         /*
 3748          * The following is redundant to the same lines in the
 3749          * sctp_aloc_assoc() but is needed since others call the add address
 3750          * function
 3751          */
 3752         struct sctp_nets *net, *netfirst;
 3753         int addr_inscope;
 3754 
 3755         SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ",
 3756             from);
 3757         SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr);
 3758 
 3759         netfirst = sctp_findnet(stcb, newaddr);
 3760         if (netfirst) {
 3761                 /*
 3762                  * Lie and return ok, we don't want to make the association
 3763                  * go away for this behavior. It will happen in the TCP
 3764                  * model in a connected socket. It does not reach the hash
 3765                  * table until after the association is built so it can't be
 3766                  * found. Mark as reachable, since the initial creation will
 3767                  * have been cleared and the NOT_IN_ASSOC flag will have
 3768                  * been added... and we don't want to end up removing it
 3769                  * back out.
 3770                  */
 3771                 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
 3772                         netfirst->dest_state = (SCTP_ADDR_REACHABLE |
 3773                             SCTP_ADDR_UNCONFIRMED);
 3774                 } else {
 3775                         netfirst->dest_state = SCTP_ADDR_REACHABLE;
 3776                 }
 3777 
 3778                 return (0);
 3779         }
 3780         addr_inscope = 1;
 3781         switch (newaddr->sa_family) {
 3782 #ifdef INET
 3783         case AF_INET:
 3784                 {
 3785                         struct sockaddr_in *sin;
 3786 
 3787                         sin = (struct sockaddr_in *)newaddr;
 3788                         if (sin->sin_addr.s_addr == 0) {
 3789                                 /* Invalid address */
 3790                                 return (-1);
 3791                         }
 3792                         /* zero out the bzero area */
 3793                         memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
 3794 
 3795                         /* assure len is set */
 3796                         sin->sin_len = sizeof(struct sockaddr_in);
 3797                         if (set_scope) {
 3798 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE
 3799                                 stcb->asoc.scope.ipv4_local_scope = 1;
 3800 #else
 3801                                 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
 3802                                         stcb->asoc.scope.ipv4_local_scope = 1;
 3803                                 }
 3804 #endif                          /* SCTP_DONT_DO_PRIVADDR_SCOPE */
 3805                         } else {
 3806                                 /* Validate the address is in scope */
 3807                                 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
 3808                                     (stcb->asoc.scope.ipv4_local_scope == 0)) {
 3809                                         addr_inscope = 0;
 3810                                 }
 3811                         }
 3812                         break;
 3813                 }
 3814 #endif
 3815 #ifdef INET6
 3816         case AF_INET6:
 3817                 {
 3818                         struct sockaddr_in6 *sin6;
 3819 
 3820                         sin6 = (struct sockaddr_in6 *)newaddr;
 3821                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
 3822                                 /* Invalid address */
 3823                                 return (-1);
 3824                         }
 3825                         /* assure len is set */
 3826                         sin6->sin6_len = sizeof(struct sockaddr_in6);
 3827                         if (set_scope) {
 3828                                 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) {
 3829                                         stcb->asoc.scope.loopback_scope = 1;
 3830                                         stcb->asoc.scope.local_scope = 0;
 3831                                         stcb->asoc.scope.ipv4_local_scope = 1;
 3832                                         stcb->asoc.scope.site_scope = 1;
 3833                                 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
 3834                                         /*
 3835                                          * If the new destination is a
 3836                                          * LINK_LOCAL we must have common
 3837                                          * site scope. Don't set the local
 3838                                          * scope since we may not share all
 3839                                          * links, only loopback can do this.
 3840                                          * Links on the local network would
 3841                                          * also be on our private network
 3842                                          * for v4 too.
 3843                                          */
 3844                                         stcb->asoc.scope.ipv4_local_scope = 1;
 3845                                         stcb->asoc.scope.site_scope = 1;
 3846                                 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
 3847                                         /*
 3848                                          * If the new destination is
 3849                                          * SITE_LOCAL then we must have site
 3850                                          * scope in common.
 3851                                          */
 3852                                         stcb->asoc.scope.site_scope = 1;
 3853                                 }
 3854                         } else {
 3855                                 /* Validate the address is in scope */
 3856                                 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
 3857                                     (stcb->asoc.scope.loopback_scope == 0)) {
 3858                                         addr_inscope = 0;
 3859                                 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
 3860                                     (stcb->asoc.scope.local_scope == 0)) {
 3861                                         addr_inscope = 0;
 3862                                 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
 3863                                     (stcb->asoc.scope.site_scope == 0)) {
 3864                                         addr_inscope = 0;
 3865                                 }
 3866                         }
 3867                         break;
 3868                 }
 3869 #endif
 3870         default:
 3871                 /* not supported family type */
 3872                 return (-1);
 3873         }
 3874         net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets);
 3875         if (net == NULL) {
 3876                 return (-1);
 3877         }
 3878         SCTP_INCR_RADDR_COUNT();
 3879         bzero(net, sizeof(struct sctp_nets));
 3880         (void)SCTP_GETTIME_TIMEVAL(&net->start_time);
 3881         memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
 3882         switch (newaddr->sa_family) {
 3883 #ifdef INET
 3884         case AF_INET:
 3885                 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
 3886                 break;
 3887 #endif
 3888 #ifdef INET6
 3889         case AF_INET6:
 3890                 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
 3891                 break;
 3892 #endif
 3893         default:
 3894                 break;
 3895         }
 3896         net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id);
 3897         if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) {
 3898                 stcb->asoc.scope.loopback_scope = 1;
 3899                 stcb->asoc.scope.ipv4_local_scope = 1;
 3900                 stcb->asoc.scope.local_scope = 0;
 3901                 stcb->asoc.scope.site_scope = 1;
 3902                 addr_inscope = 1;
 3903         }
 3904         net->failure_threshold = stcb->asoc.def_net_failure;
 3905         net->pf_threshold = stcb->asoc.def_net_pf_threshold;
 3906         if (addr_inscope == 0) {
 3907                 net->dest_state = (SCTP_ADDR_REACHABLE |
 3908                     SCTP_ADDR_OUT_OF_SCOPE);
 3909         } else {
 3910                 if (from == SCTP_ADDR_IS_CONFIRMED)
 3911                         /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */
 3912                         net->dest_state = SCTP_ADDR_REACHABLE;
 3913                 else
 3914                         net->dest_state = SCTP_ADDR_REACHABLE |
 3915                             SCTP_ADDR_UNCONFIRMED;
 3916         }
 3917         /*
 3918          * We set this to 0, the timer code knows that this means its an
 3919          * initial value
 3920          */
 3921         net->rto_needed = 1;
 3922         net->RTO = 0;
 3923         net->RTO_measured = 0;
 3924         stcb->asoc.numnets++;
 3925         net->ref_count = 1;
 3926         net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1;
 3927         net->port = stcb->asoc.port;
 3928         net->dscp = stcb->asoc.default_dscp;
 3929 #ifdef INET6
 3930         net->flowlabel = stcb->asoc.default_flowlabel;
 3931 #endif
 3932         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) {
 3933                 net->dest_state |= SCTP_ADDR_NOHB;
 3934         } else {
 3935                 net->dest_state &= ~SCTP_ADDR_NOHB;
 3936         }
 3937         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) {
 3938                 net->dest_state |= SCTP_ADDR_NO_PMTUD;
 3939         } else {
 3940                 net->dest_state &= ~SCTP_ADDR_NO_PMTUD;
 3941         }
 3942         net->heart_beat_delay = stcb->asoc.heart_beat_delay;
 3943         /* Init the timer structure */
 3944         SCTP_OS_TIMER_INIT(&net->rxt_timer.timer);
 3945         SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer);
 3946         SCTP_OS_TIMER_INIT(&net->hb_timer.timer);
 3947 
 3948         /* Now generate a route for this guy */
 3949 #ifdef INET6
 3950         /* KAME hack: embed scopeid */
 3951         if (newaddr->sa_family == AF_INET6) {
 3952                 struct sockaddr_in6 *sin6;
 3953 
 3954                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
 3955                 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
 3956                 sin6->sin6_scope_id = 0;
 3957         }
 3958 #endif
 3959         SCTP_RTALLOC((sctp_route_t *) & net->ro, stcb->asoc.vrf_id);
 3960 
 3961         if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) {
 3962                 /* Get source address */
 3963                 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep,
 3964                     stcb,
 3965                     (sctp_route_t *) & net->ro,
 3966                     net,
 3967                     0,
 3968                     stcb->asoc.vrf_id);
 3969                 /* Now get the interface MTU */
 3970                 if (net->ro._s_addr && net->ro._s_addr->ifn_p) {
 3971                         net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p);
 3972                 }
 3973                 if (net->mtu > 0) {
 3974                         uint32_t rmtu;
 3975 
 3976                         rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt);
 3977                         if (rmtu == 0) {
 3978                                 /*
 3979                                  * Start things off to match mtu of
 3980                                  * interface please.
 3981                                  */
 3982                                 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa,
 3983                                     net->ro.ro_rt, net->mtu);
 3984                         } else {
 3985                                 /*
 3986                                  * we take the route mtu over the interface,
 3987                                  * since the route may be leading out the
 3988                                  * loopback, or a different interface.
 3989                                  */
 3990                                 net->mtu = rmtu;
 3991                         }
 3992                 }
 3993         }
 3994         if (net->mtu == 0) {
 3995                 switch (newaddr->sa_family) {
 3996 #ifdef INET
 3997                 case AF_INET:
 3998                         net->mtu = SCTP_DEFAULT_MTU;
 3999                         break;
 4000 #endif
 4001 #ifdef INET6
 4002                 case AF_INET6:
 4003                         net->mtu = 1280;
 4004                         break;
 4005 #endif
 4006                 default:
 4007                         break;
 4008                 }
 4009         }
 4010         if (net->port) {
 4011                 net->mtu -= (uint32_t) sizeof(struct udphdr);
 4012         }
 4013         if (from == SCTP_ALLOC_ASOC) {
 4014                 stcb->asoc.smallest_mtu = net->mtu;
 4015         }
 4016         if (stcb->asoc.smallest_mtu > net->mtu) {
 4017                 stcb->asoc.smallest_mtu = net->mtu;
 4018         }
 4019 #ifdef INET6
 4020         if (newaddr->sa_family == AF_INET6) {
 4021                 struct sockaddr_in6 *sin6;
 4022 
 4023                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
 4024                 (void)sa6_recoverscope(sin6);
 4025         }
 4026 #endif
 4027 
 4028         /* JRS - Use the congestion control given in the CC module */
 4029         if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL)
 4030                 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net);
 4031 
 4032         /*
 4033          * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning
 4034          * of assoc (2005/06/27, iyengar@cis.udel.edu)
 4035          */
 4036         net->find_pseudo_cumack = 1;
 4037         net->find_rtx_pseudo_cumack = 1;
 4038         net->src_addr_selected = 0;
 4039         /* Choose an initial flowid. */
 4040         net->flowid = stcb->asoc.my_vtag ^
 4041             ntohs(stcb->rport) ^
 4042             ntohs(stcb->sctp_ep->sctp_lport);
 4043 #ifdef INVARIANTS
 4044         net->flowidset = 1;
 4045 #endif
 4046         if (netp) {
 4047                 *netp = net;
 4048         }
 4049         netfirst = TAILQ_FIRST(&stcb->asoc.nets);
 4050         if (net->ro.ro_rt == NULL) {
 4051                 /* Since we have no route put it at the back */
 4052                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
 4053         } else if (netfirst == NULL) {
 4054                 /* We are the first one in the pool. */
 4055                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
 4056         } else if (netfirst->ro.ro_rt == NULL) {
 4057                 /*
 4058                  * First one has NO route. Place this one ahead of the first
 4059                  * one.
 4060                  */
 4061                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
 4062         } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) {
 4063                 /*
 4064                  * This one has a different interface than the one at the
 4065                  * top of the list. Place it ahead.
 4066                  */
 4067                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
 4068         } else {
 4069                 /*
 4070                  * Ok we have the same interface as the first one. Move
 4071                  * forward until we find either a) one with a NULL route...
 4072                  * insert ahead of that b) one with a different ifp.. insert
 4073                  * after that. c) end of the list.. insert at the tail.
 4074                  */
 4075                 struct sctp_nets *netlook;
 4076 
 4077                 do {
 4078                         netlook = TAILQ_NEXT(netfirst, sctp_next);
 4079                         if (netlook == NULL) {
 4080                                 /* End of the list */
 4081                                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
 4082                                 break;
 4083                         } else if (netlook->ro.ro_rt == NULL) {
 4084                                 /* next one has NO route */
 4085                                 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
 4086                                 break;
 4087                         } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) {
 4088                                 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
 4089                                     net, sctp_next);
 4090                                 break;
 4091                         }
 4092                         /* Shift forward */
 4093                         netfirst = netlook;
 4094                 } while (netlook != NULL);
 4095         }
 4096 
 4097         /* got to have a primary set */
 4098         if (stcb->asoc.primary_destination == 0) {
 4099                 stcb->asoc.primary_destination = net;
 4100         } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) &&
 4101                     (net->ro.ro_rt) &&
 4102             ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
 4103                 /* No route to current primary adopt new primary */
 4104                 stcb->asoc.primary_destination = net;
 4105         }
 4106         /* Validate primary is first */
 4107         net = TAILQ_FIRST(&stcb->asoc.nets);
 4108         if ((net != stcb->asoc.primary_destination) &&
 4109             (stcb->asoc.primary_destination)) {
 4110                 /*
 4111                  * first one on the list is NOT the primary sctp_cmpaddr()
 4112                  * is much more efficient if the primary is the first on the
 4113                  * list, make it so.
 4114                  */
 4115                 TAILQ_REMOVE(&stcb->asoc.nets,
 4116                     stcb->asoc.primary_destination, sctp_next);
 4117                 TAILQ_INSERT_HEAD(&stcb->asoc.nets,
 4118                     stcb->asoc.primary_destination, sctp_next);
 4119         }
 4120         return (0);
 4121 }
 4122 
 4123 
 4124 static uint32_t
 4125 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
 4126 {
 4127         uint32_t id;
 4128         struct sctpasochead *head;
 4129         struct sctp_tcb *lstcb;
 4130 
 4131         SCTP_INP_WLOCK(inp);
 4132 try_again:
 4133         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
 4134                 /* TSNH */
 4135                 SCTP_INP_WUNLOCK(inp);
 4136                 return (0);
 4137         }
 4138         /*
 4139          * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC,
 4140          * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC.
 4141          */
 4142         if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) {
 4143                 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1;
 4144         }
 4145         id = inp->sctp_associd_counter;
 4146         inp->sctp_associd_counter++;
 4147         lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t) id, 0);
 4148         if (lstcb) {
 4149                 goto try_again;
 4150         }
 4151         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
 4152         LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash);
 4153         stcb->asoc.in_asocid_hash = 1;
 4154         SCTP_INP_WUNLOCK(inp);
 4155         return id;
 4156 }
 4157 
 4158 /*
 4159  * allocate an association and add it to the endpoint. The caller must be
 4160  * careful to add all additional addresses once they are know right away or
 4161  * else the assoc will be may experience a blackout scenario.
 4162  */
 4163 struct sctp_tcb *
 4164 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
 4165     int *error, uint32_t override_tag, uint32_t vrf_id,
 4166     struct thread *p
 4167 )
 4168 {
 4169         /* note the p argument is only valid in unbound sockets */
 4170 
 4171         struct sctp_tcb *stcb;
 4172         struct sctp_association *asoc;
 4173         struct sctpasochead *head;
 4174         uint16_t rport;
 4175         int err;
 4176 
 4177         /*
 4178          * Assumption made here: Caller has done a
 4179          * sctp_findassociation_ep_addr(ep, addr's); to make sure the
 4180          * address does not exist already.
 4181          */
 4182         if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) {
 4183                 /* Hit max assoc, sorry no more */
 4184                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
 4185                 *error = ENOBUFS;
 4186                 return (NULL);
 4187         }
 4188         if (firstaddr == NULL) {
 4189                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
 4190                 *error = EINVAL;
 4191                 return (NULL);
 4192         }
 4193         SCTP_INP_RLOCK(inp);
 4194         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) &&
 4195             ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) ||
 4196             (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) {
 4197                 /*
 4198                  * If its in the TCP pool, its NOT allowed to create an
 4199                  * association. The parent listener needs to call
 4200                  * sctp_aloc_assoc.. or the one-2-many socket. If a peeled
 4201                  * off, or connected one does this.. its an error.
 4202                  */
 4203                 SCTP_INP_RUNLOCK(inp);
 4204                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
 4205                 *error = EINVAL;
 4206                 return (NULL);
 4207         }
 4208         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) ||
 4209             (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) {
 4210                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) ||
 4211                     (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) {
 4212                         SCTP_INP_RUNLOCK(inp);
 4213                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
 4214                         *error = EINVAL;
 4215                         return (NULL);
 4216                 }
 4217         }
 4218         SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:");
 4219 #ifdef SCTP_DEBUG
 4220         if (firstaddr) {
 4221                 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr);
 4222                 switch (firstaddr->sa_family) {
 4223 #ifdef INET
 4224                 case AF_INET:
 4225                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
 4226                             ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
 4227                         break;
 4228 #endif
 4229 #ifdef INET6
 4230                 case AF_INET6:
 4231                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
 4232                             ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port));
 4233                         break;
 4234 #endif
 4235                 default:
 4236                         break;
 4237                 }
 4238         } else {
 4239                 SCTPDBG(SCTP_DEBUG_PCB3, "None\n");
 4240         }
 4241 #endif                          /* SCTP_DEBUG */
 4242         switch (firstaddr->sa_family) {
 4243 #ifdef INET
 4244         case AF_INET:
 4245                 {
 4246                         struct sockaddr_in *sin;
 4247 
 4248                         sin = (struct sockaddr_in *)firstaddr;
 4249                         if ((ntohs(sin->sin_port) == 0) ||
 4250                             (sin->sin_addr.s_addr == INADDR_ANY) ||
 4251                             (sin->sin_addr.s_addr == INADDR_BROADCAST) ||
 4252                             IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
 4253                                 /* Invalid address */
 4254                                 SCTP_INP_RUNLOCK(inp);
 4255                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
 4256                                 *error = EINVAL;
 4257                                 return (NULL);
 4258                         }
 4259                         rport = sin->sin_port;
 4260                         break;
 4261                 }
 4262 #endif
 4263 #ifdef INET6
 4264         case AF_INET6:
 4265                 {
 4266                         struct sockaddr_in6 *sin6;
 4267 
 4268                         sin6 = (struct sockaddr_in6 *)firstaddr;
 4269                         if ((ntohs(sin6->sin6_port) == 0) ||
 4270                             IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
 4271                             IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
 4272                                 /* Invalid address */
 4273                                 SCTP_INP_RUNLOCK(inp);
 4274                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
 4275                                 *error = EINVAL;
 4276                                 return (NULL);
 4277                         }
 4278                         rport = sin6->sin6_port;
 4279                         break;
 4280                 }
 4281 #endif
 4282         default:
 4283                 /* not supported family type */
 4284                 SCTP_INP_RUNLOCK(inp);
 4285                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
 4286                 *error = EINVAL;
 4287                 return (NULL);
 4288         }
 4289         SCTP_INP_RUNLOCK(inp);
 4290         if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
 4291                 /*
 4292                  * If you have not performed a bind, then we need to do the
 4293                  * ephemeral bind for you.
 4294                  */
 4295                 if ((err = sctp_inpcb_bind(inp->sctp_socket,
 4296                     (struct sockaddr *)NULL,
 4297                     (struct sctp_ifa *)NULL,
 4298                     p
 4299                     ))) {
 4300                         /* bind error, probably perm */
 4301                         *error = err;
 4302                         return (NULL);
 4303                 }
 4304         }
 4305         stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb);
 4306         if (stcb == NULL) {
 4307                 /* out of memory? */
 4308                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
 4309                 *error = ENOMEM;
 4310                 return (NULL);
 4311         }
 4312         SCTP_INCR_ASOC_COUNT();
 4313 
 4314         bzero(stcb, sizeof(*stcb));
 4315         asoc = &stcb->asoc;
 4316 
 4317         asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb);
 4318         SCTP_TCB_LOCK_INIT(stcb);
 4319         SCTP_TCB_SEND_LOCK_INIT(stcb);
 4320         stcb->rport = rport;
 4321         /* setup back pointer's */
 4322         stcb->sctp_ep = inp;
 4323         stcb->sctp_socket = inp->sctp_socket;
 4324         if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id))) {
 4325                 /* failed */
 4326                 SCTP_TCB_LOCK_DESTROY(stcb);
 4327                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
 4328                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
 4329                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
 4330                 SCTP_DECR_ASOC_COUNT();
 4331                 *error = err;
 4332                 return (NULL);
 4333         }
 4334         /* and the port */
 4335         SCTP_INP_INFO_WLOCK();
 4336         SCTP_INP_WLOCK(inp);
 4337         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
 4338                 /* inpcb freed while alloc going on */
 4339                 SCTP_TCB_LOCK_DESTROY(stcb);
 4340                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
 4341                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
 4342                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
 4343                 SCTP_INP_WUNLOCK(inp);
 4344                 SCTP_INP_INFO_WUNLOCK();
 4345                 SCTP_DECR_ASOC_COUNT();
 4346                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
 4347                 *error = EINVAL;
 4348                 return (NULL);
 4349         }
 4350         SCTP_TCB_LOCK(stcb);
 4351 
 4352         /* now that my_vtag is set, add it to the hash */
 4353         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
 4354         /* put it in the bucket in the vtag hash of assoc's for the system */
 4355         LIST_INSERT_HEAD(head, stcb, sctp_asocs);
 4356         SCTP_INP_INFO_WUNLOCK();
 4357 
 4358         if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) {
 4359                 /* failure.. memory error? */
 4360                 if (asoc->strmout) {
 4361                         SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
 4362                         asoc->strmout = NULL;
 4363                 }
 4364                 if (asoc->mapping_array) {
 4365                         SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
 4366                         asoc->mapping_array = NULL;
 4367                 }
 4368                 if (asoc->nr_mapping_array) {
 4369                         SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
 4370                         asoc->nr_mapping_array = NULL;
 4371                 }
 4372                 SCTP_DECR_ASOC_COUNT();
 4373                 SCTP_TCB_UNLOCK(stcb);
 4374                 SCTP_TCB_LOCK_DESTROY(stcb);
 4375                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
 4376                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
 4377                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
 4378                 SCTP_INP_WUNLOCK(inp);
 4379                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
 4380                 *error = ENOBUFS;
 4381                 return (NULL);
 4382         }
 4383         /* Init all the timers */
 4384         SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer);
 4385         SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer);
 4386         SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer);
 4387         SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer);
 4388         SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer);
 4389         SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer);
 4390         SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer);
 4391 
 4392         LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
 4393         /* now file the port under the hash as well */
 4394         if (inp->sctp_tcbhash != NULL) {
 4395                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
 4396                     inp->sctp_hashmark)];
 4397                 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
 4398         }
 4399         SCTP_INP_WUNLOCK(inp);
 4400         SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb);
 4401         return (stcb);
 4402 }
 4403 
 4404 
 4405 void
 4406 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net)
 4407 {
 4408         struct sctp_association *asoc;
 4409 
 4410         asoc = &stcb->asoc;
 4411         asoc->numnets--;
 4412         TAILQ_REMOVE(&asoc->nets, net, sctp_next);
 4413         if (net == asoc->primary_destination) {
 4414                 /* Reset primary */
 4415                 struct sctp_nets *lnet;
 4416 
 4417                 lnet = TAILQ_FIRST(&asoc->nets);
 4418                 /*
 4419                  * Mobility adaptation Ideally, if deleted destination is
 4420                  * the primary, it becomes a fast retransmission trigger by
 4421                  * the subsequent SET PRIMARY. (by micchie)
 4422                  */
 4423                 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
 4424                     SCTP_MOBILITY_BASE) ||
 4425                     sctp_is_mobility_feature_on(stcb->sctp_ep,
 4426                     SCTP_MOBILITY_FASTHANDOFF)) {
 4427                         SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n");
 4428                         if (asoc->deleted_primary != NULL) {
 4429                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n");
 4430                                 goto out;
 4431                         }
 4432                         asoc->deleted_primary = net;
 4433                         atomic_add_int(&net->ref_count, 1);
 4434                         memset(&net->lastsa, 0, sizeof(net->lastsa));
 4435                         memset(&net->lastsv, 0, sizeof(net->lastsv));
 4436                         sctp_mobility_feature_on(stcb->sctp_ep,
 4437                             SCTP_MOBILITY_PRIM_DELETED);
 4438                         sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED,
 4439                             stcb->sctp_ep, stcb, NULL);
 4440                 }
 4441 out:
 4442                 /* Try to find a confirmed primary */
 4443                 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0);
 4444         }
 4445         if (net == asoc->last_data_chunk_from) {
 4446                 /* Reset primary */
 4447                 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets);
 4448         }
 4449         if (net == asoc->last_control_chunk_from) {
 4450                 /* Clear net */
 4451                 asoc->last_control_chunk_from = NULL;
 4452         }
 4453         if (net == stcb->asoc.alternate) {
 4454                 sctp_free_remote_addr(stcb->asoc.alternate);
 4455                 stcb->asoc.alternate = NULL;
 4456         }
 4457         sctp_free_remote_addr(net);
 4458 }
 4459 
 4460 /*
 4461  * remove a remote endpoint address from an association, it will fail if the
 4462  * address does not exist.
 4463  */
 4464 int
 4465 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
 4466 {
 4467         /*
 4468          * Here we need to remove a remote address. This is quite simple, we
 4469          * first find it in the list of address for the association
 4470          * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE
 4471          * on that item. Note we do not allow it to be removed if there are
 4472          * no other addresses.
 4473          */
 4474         struct sctp_association *asoc;
 4475         struct sctp_nets *net, *nnet;
 4476 
 4477         asoc = &stcb->asoc;
 4478 
 4479         /* locate the address */
 4480         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
 4481                 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
 4482                         continue;
 4483                 }
 4484                 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
 4485                     remaddr)) {
 4486                         /* we found the guy */
 4487                         if (asoc->numnets < 2) {
 4488                                 /* Must have at LEAST two remote addresses */
 4489                                 return (-1);
 4490                         } else {
 4491                                 sctp_remove_net(stcb, net);
 4492                                 return (0);
 4493                         }
 4494                 }
 4495         }
 4496         /* not found. */
 4497         return (-2);
 4498 }
 4499 
 4500 void
 4501 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
 4502 {
 4503         struct sctpvtaghead *chain;
 4504         struct sctp_tagblock *twait_block;
 4505         int found = 0;
 4506         int i;
 4507 
 4508         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
 4509         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
 4510                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
 4511                         if ((twait_block->vtag_block[i].v_tag == tag) &&
 4512                             (twait_block->vtag_block[i].lport == lport) &&
 4513                             (twait_block->vtag_block[i].rport == rport)) {
 4514                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
 4515                                 twait_block->vtag_block[i].v_tag = 0;
 4516                                 twait_block->vtag_block[i].lport = 0;
 4517                                 twait_block->vtag_block[i].rport = 0;
 4518                                 found = 1;
 4519                                 break;
 4520                         }
 4521                 }
 4522                 if (found)
 4523                         break;
 4524         }
 4525 }
 4526 
 4527 int
 4528 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
 4529 {
 4530         struct sctpvtaghead *chain;
 4531         struct sctp_tagblock *twait_block;
 4532         int found = 0;
 4533         int i;
 4534 
 4535         SCTP_INP_INFO_WLOCK();
 4536         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
 4537         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
 4538                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
 4539                         if ((twait_block->vtag_block[i].v_tag == tag) &&
 4540                             (twait_block->vtag_block[i].lport == lport) &&
 4541                             (twait_block->vtag_block[i].rport == rport)) {
 4542                                 found = 1;
 4543                                 break;
 4544                         }
 4545                 }
 4546                 if (found)
 4547                         break;
 4548         }
 4549         SCTP_INP_INFO_WUNLOCK();
 4550         return (found);
 4551 }
 4552 
 4553 
 4554 void
 4555 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport)
 4556 {
 4557         struct sctpvtaghead *chain;
 4558         struct sctp_tagblock *twait_block;
 4559         struct timeval now;
 4560         int set, i;
 4561 
 4562         if (time == 0) {
 4563                 /* Its disabled */
 4564                 return;
 4565         }
 4566         (void)SCTP_GETTIME_TIMEVAL(&now);
 4567         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
 4568         set = 0;
 4569         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
 4570                 /* Block(s) present, lets find space, and expire on the fly */
 4571                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
 4572                         if ((twait_block->vtag_block[i].v_tag == 0) &&
 4573                             !set) {
 4574                                 twait_block->vtag_block[i].tv_sec_at_expire =
 4575                                     now.tv_sec + time;
 4576                                 twait_block->vtag_block[i].v_tag = tag;
 4577                                 twait_block->vtag_block[i].lport = lport;
 4578                                 twait_block->vtag_block[i].rport = rport;
 4579                                 set = 1;
 4580                         } else if ((twait_block->vtag_block[i].v_tag) &&
 4581                             ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) {
 4582                                 /* Audit expires this guy */
 4583                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
 4584                                 twait_block->vtag_block[i].v_tag = 0;
 4585                                 twait_block->vtag_block[i].lport = 0;
 4586                                 twait_block->vtag_block[i].rport = 0;
 4587                                 if (set == 0) {
 4588                                         /* Reuse it for my new tag */
 4589                                         twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time;
 4590                                         twait_block->vtag_block[i].v_tag = tag;
 4591                                         twait_block->vtag_block[i].lport = lport;
 4592                                         twait_block->vtag_block[i].rport = rport;
 4593                                         set = 1;
 4594                                 }
 4595                         }
 4596                 }
 4597                 if (set) {
 4598                         /*
 4599                          * We only do up to the block where we can place our
 4600                          * tag for audits
 4601                          */
 4602                         break;
 4603                 }
 4604         }
 4605         /* Need to add a new block to chain */
 4606         if (!set) {
 4607                 SCTP_MALLOC(twait_block, struct sctp_tagblock *,
 4608                     sizeof(struct sctp_tagblock), SCTP_M_TIMW);
 4609                 if (twait_block == NULL) {
 4610 #ifdef INVARIANTS
 4611                         panic("Can not alloc tagblock");
 4612 #endif
 4613                         return;
 4614                 }
 4615                 memset(twait_block, 0, sizeof(struct sctp_tagblock));
 4616                 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
 4617                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time;
 4618                 twait_block->vtag_block[0].v_tag = tag;
 4619                 twait_block->vtag_block[0].lport = lport;
 4620                 twait_block->vtag_block[0].rport = rport;
 4621         }
 4622 }
 4623 
 4624 
 4625 
 4626 /*-
 4627  * Free the association after un-hashing the remote port. This
 4628  * function ALWAYS returns holding NO LOCK on the stcb. It DOES
 4629  * expect that the input to this function IS a locked TCB.
 4630  * It will return 0, if it did NOT destroy the association (instead
 4631  * it unlocks it. It will return NON-zero if it either destroyed the
 4632  * association OR the association is already destroyed.
 4633  */
 4634 int
 4635 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location)
 4636 {
 4637         int i;
 4638         struct sctp_association *asoc;
 4639         struct sctp_nets *net, *nnet;
 4640         struct sctp_laddr *laddr, *naddr;
 4641         struct sctp_tmit_chunk *chk, *nchk;
 4642         struct sctp_asconf_addr *aparam, *naparam;
 4643         struct sctp_asconf_ack *aack, *naack;
 4644         struct sctp_stream_reset_list *strrst, *nstrrst;
 4645         struct sctp_queued_to_read *sq, *nsq;
 4646         struct sctp_stream_queue_pending *sp, *nsp;
 4647         sctp_sharedkey_t *shared_key, *nshared_key;
 4648         struct socket *so;
 4649 
 4650         /* first, lets purge the entry from the hash table. */
 4651 
 4652 #ifdef SCTP_LOG_CLOSING
 4653         sctp_log_closing(inp, stcb, 6);
 4654 #endif
 4655         if (stcb->asoc.state == 0) {
 4656 #ifdef SCTP_LOG_CLOSING
 4657                 sctp_log_closing(inp, NULL, 7);
 4658 #endif
 4659                 /* there is no asoc, really TSNH :-0 */
 4660                 return (1);
 4661         }
 4662         if (stcb->asoc.alternate) {
 4663                 sctp_free_remote_addr(stcb->asoc.alternate);
 4664                 stcb->asoc.alternate = NULL;
 4665         }
 4666         /* TEMP CODE */
 4667         if (stcb->freed_from_where == 0) {
 4668                 /* Only record the first place free happened from */
 4669                 stcb->freed_from_where = from_location;
 4670         }
 4671         /* TEMP CODE */
 4672 
 4673         asoc = &stcb->asoc;
 4674         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
 4675             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
 4676                 /* nothing around */
 4677                 so = NULL;
 4678         else
 4679                 so = inp->sctp_socket;
 4680 
 4681         /*
 4682          * We used timer based freeing if a reader or writer is in the way.
 4683          * So we first check if we are actually being called from a timer,
 4684          * if so we abort early if a reader or writer is still in the way.
 4685          */
 4686         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
 4687             (from_inpcbfree == SCTP_NORMAL_PROC)) {
 4688                 /*
 4689                  * is it the timer driving us? if so are the reader/writers
 4690                  * gone?
 4691                  */
 4692                 if (stcb->asoc.refcnt) {
 4693                         /* nope, reader or writer in the way */
 4694                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
 4695                         /* no asoc destroyed */
 4696                         SCTP_TCB_UNLOCK(stcb);
 4697 #ifdef SCTP_LOG_CLOSING
 4698                         sctp_log_closing(inp, stcb, 8);
 4699 #endif
 4700                         return (0);
 4701                 }
 4702         }
 4703         /* now clean up any other timers */
 4704         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
 4705         asoc->dack_timer.self = NULL;
 4706         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
 4707         /*-
 4708          * For stream reset we don't blast this unless
 4709          * it is a str-reset timer, it might be the
 4710          * free-asoc timer which we DON'T want to
 4711          * disturb.
 4712          */
 4713         if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET)
 4714                 asoc->strreset_timer.self = NULL;
 4715         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
 4716         asoc->asconf_timer.self = NULL;
 4717         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
 4718         asoc->autoclose_timer.self = NULL;
 4719         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
 4720         asoc->shut_guard_timer.self = NULL;
 4721         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
 4722         asoc->delayed_event_timer.self = NULL;
 4723         /* Mobility adaptation */
 4724         (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer);
 4725         asoc->delete_prim_timer.self = NULL;
 4726         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
 4727                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
 4728                 net->rxt_timer.self = NULL;
 4729                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
 4730                 net->pmtu_timer.self = NULL;
 4731                 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer);
 4732                 net->hb_timer.self = NULL;
 4733         }
 4734         /* Now the read queue needs to be cleaned up (only once) */
 4735         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) {
 4736                 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED;
 4737                 SCTP_INP_READ_LOCK(inp);
 4738                 TAILQ_FOREACH(sq, &inp->read_queue, next) {
 4739                         if (sq->stcb == stcb) {
 4740                                 sq->do_not_ref_stcb = 1;
 4741                                 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
 4742                                 /*
 4743                                  * If there is no end, there never will be
 4744                                  * now.
 4745                                  */
 4746                                 if (sq->end_added == 0) {
 4747                                         /* Held for PD-API clear that. */
 4748                                         sq->pdapi_aborted = 1;
 4749                                         sq->held_length = 0;
 4750                                         if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) {
 4751                                                 /*
 4752                                                  * Need to add a PD-API
 4753                                                  * aborted indication.
 4754                                                  * Setting the control_pdapi
 4755                                                  * assures that it will be
 4756                                                  * added right after this
 4757                                                  * msg.
 4758                                                  */
 4759                                                 uint32_t strseq;
 4760 
 4761                                                 stcb->asoc.control_pdapi = sq;
 4762                                                 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn;
 4763                                                 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION,
 4764                                                     stcb,
 4765                                                     SCTP_PARTIAL_DELIVERY_ABORTED,
 4766                                                     (void *)&strseq,
 4767                                                     SCTP_SO_LOCKED);
 4768                                                 stcb->asoc.control_pdapi = NULL;
 4769                                         }
 4770                                 }
 4771                                 /* Add an end to wake them */
 4772                                 sq->end_added = 1;
 4773                         }
 4774                 }
 4775                 SCTP_INP_READ_UNLOCK(inp);
 4776                 if (stcb->block_entry) {
 4777                         SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET);
 4778                         stcb->block_entry->error = ECONNRESET;
 4779                         stcb->block_entry = NULL;
 4780                 }
 4781         }
 4782         if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) {
 4783                 /*
 4784                  * Someone holds a reference OR the socket is unaccepted
 4785                  * yet.
 4786                  */
 4787                 if ((stcb->asoc.refcnt) ||
 4788                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
 4789                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) {
 4790                         stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
 4791                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
 4792                 }
 4793                 SCTP_TCB_UNLOCK(stcb);
 4794                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
 4795                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
 4796                         /* nothing around */
 4797                         so = NULL;
 4798                 if (so) {
 4799                         /* Wake any reader/writers */
 4800                         sctp_sorwakeup(inp, so);
 4801                         sctp_sowwakeup(inp, so);
 4802                 }
 4803 #ifdef SCTP_LOG_CLOSING
 4804                 sctp_log_closing(inp, stcb, 9);
 4805 #endif
 4806                 /* no asoc destroyed */
 4807                 return (0);
 4808         }
 4809 #ifdef SCTP_LOG_CLOSING
 4810         sctp_log_closing(inp, stcb, 10);
 4811 #endif
 4812         /*
 4813          * When I reach here, no others want to kill the assoc yet.. and I
 4814          * own the lock. Now its possible an abort comes in when I do the
 4815          * lock exchange below to grab all the locks to do the final take
 4816          * out. to prevent this we increment the count, which will start a
 4817          * timer and blow out above thus assuring us that we hold exclusive
 4818          * killing of the asoc. Note that after getting back the TCB lock we
 4819          * will go ahead and increment the counter back up and stop any
 4820          * timer a passing stranger may have started :-S
 4821          */
 4822         if (from_inpcbfree == SCTP_NORMAL_PROC) {
 4823                 atomic_add_int(&stcb->asoc.refcnt, 1);
 4824 
 4825                 SCTP_TCB_UNLOCK(stcb);
 4826                 SCTP_INP_INFO_WLOCK();
 4827                 SCTP_INP_WLOCK(inp);
 4828                 SCTP_TCB_LOCK(stcb);
 4829         }
 4830         /* Double check the GONE flag */
 4831         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
 4832             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
 4833                 /* nothing around */
 4834                 so = NULL;
 4835 
 4836         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
 4837             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
 4838                 /*
 4839                  * For TCP type we need special handling when we are
 4840                  * connected. We also include the peel'ed off ones to.
 4841                  */
 4842                 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
 4843                         inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
 4844                         inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED;
 4845                         if (so) {
 4846                                 SOCK_LOCK(so);
 4847                                 if (so->so_rcv.sb_cc == 0) {
 4848                                         so->so_state &= ~(SS_ISCONNECTING |
 4849                                             SS_ISDISCONNECTING |
 4850                                             SS_ISCONFIRMING |
 4851                                             SS_ISCONNECTED);
 4852                                 }
 4853                                 socantrcvmore_locked(so);
 4854                                 sctp_sowwakeup(inp, so);
 4855                                 sctp_sorwakeup(inp, so);
 4856                                 SCTP_SOWAKEUP(so);
 4857                         }
 4858                 }
 4859         }
 4860         /*
 4861          * Make it invalid too, that way if its about to run it will abort
 4862          * and return.
 4863          */
 4864         /* re-increment the lock */
 4865         if (from_inpcbfree == SCTP_NORMAL_PROC) {
 4866                 atomic_add_int(&stcb->asoc.refcnt, -1);
 4867         }
 4868         if (stcb->asoc.refcnt) {
 4869                 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
 4870                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
 4871                 if (from_inpcbfree == SCTP_NORMAL_PROC) {
 4872                         SCTP_INP_INFO_WUNLOCK();
 4873                         SCTP_INP_WUNLOCK(inp);
 4874                 }
 4875                 SCTP_TCB_UNLOCK(stcb);
 4876                 return (0);
 4877         }
 4878         asoc->state = 0;
 4879         if (inp->sctp_tcbhash) {
 4880                 LIST_REMOVE(stcb, sctp_tcbhash);
 4881         }
 4882         if (stcb->asoc.in_asocid_hash) {
 4883                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
 4884         }
 4885         /* Now lets remove it from the list of ALL associations in the EP */
 4886         LIST_REMOVE(stcb, sctp_tcblist);
 4887         if (from_inpcbfree == SCTP_NORMAL_PROC) {
 4888                 SCTP_INP_INCR_REF(inp);
 4889                 SCTP_INP_WUNLOCK(inp);
 4890         }
 4891         /* pull from vtag hash */
 4892         LIST_REMOVE(stcb, sctp_asocs);
 4893         sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait),
 4894             inp->sctp_lport, stcb->rport);
 4895 
 4896         /*
 4897          * Now restop the timers to be sure this is paranoia at is finest!
 4898          */
 4899         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
 4900         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
 4901         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
 4902         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
 4903         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
 4904         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
 4905         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
 4906         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
 4907                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
 4908                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
 4909                 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer);
 4910         }
 4911 
 4912         asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE;
 4913         /*
 4914          * The chunk lists and such SHOULD be empty but we check them just
 4915          * in case.
 4916          */
 4917         /* anything on the wheel needs to be removed */
 4918         for (i = 0; i < asoc->streamoutcnt; i++) {
 4919                 struct sctp_stream_out *outs;
 4920 
 4921                 outs = &asoc->strmout[i];
 4922                 /* now clean up any chunks here */
 4923                 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) {
 4924                         TAILQ_REMOVE(&outs->outqueue, sp, next);
 4925                         sctp_free_spbufspace(stcb, asoc, sp);
 4926                         if (sp->data) {
 4927                                 if (so) {
 4928                                         /* Still an open socket - report */
 4929                                         sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb,
 4930                                             0, (void *)sp, SCTP_SO_LOCKED);
 4931                                 }
 4932                                 if (sp->data) {
 4933                                         sctp_m_freem(sp->data);
 4934                                         sp->data = NULL;
 4935                                         sp->tail_mbuf = NULL;
 4936                                         sp->length = 0;
 4937                                 }
 4938                         }
 4939                         if (sp->net) {
 4940                                 sctp_free_remote_addr(sp->net);
 4941                                 sp->net = NULL;
 4942                         }
 4943                         sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
 4944                 }
 4945         }
 4946         /* sa_ignore FREED_MEMORY */
 4947         TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) {
 4948                 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp);
 4949                 SCTP_FREE(strrst, SCTP_M_STRESET);
 4950         }
 4951         TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) {
 4952                 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
 4953                 if (sq->data) {
 4954                         sctp_m_freem(sq->data);
 4955                         sq->data = NULL;
 4956                 }
 4957                 sctp_free_remote_addr(sq->whoFrom);
 4958                 sq->whoFrom = NULL;
 4959                 sq->stcb = NULL;
 4960                 /* Free the ctl entry */
 4961                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq);
 4962                 SCTP_DECR_READQ_COUNT();
 4963                 /* sa_ignore FREED_MEMORY */
 4964         }
 4965         TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) {
 4966                 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next);
 4967                 if (chk->data) {
 4968                         sctp_m_freem(chk->data);
 4969                         chk->data = NULL;
 4970                 }
 4971                 if (chk->holds_key_ref)
 4972                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
 4973                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
 4974                 SCTP_DECR_CHK_COUNT();
 4975                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1);
 4976                 asoc->free_chunk_cnt--;
 4977                 /* sa_ignore FREED_MEMORY */
 4978         }
 4979         /* pending send queue SHOULD be empty */
 4980         TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
 4981                 if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) {
 4982                         asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--;
 4983 #ifdef INVARIANTS
 4984                 } else {
 4985                         panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number);
 4986 #endif
 4987                 }
 4988                 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
 4989                 if (chk->data) {
 4990                         if (so) {
 4991                                 /* Still a socket? */
 4992                                 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb,
 4993                                     0, chk, SCTP_SO_LOCKED);
 4994                         }
 4995                         if (chk->data) {
 4996                                 sctp_m_freem(chk->data);
 4997                                 chk->data = NULL;
 4998                         }
 4999                 }
 5000                 if (chk->holds_key_ref)
 5001                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
 5002                 if (chk->whoTo) {
 5003                         sctp_free_remote_addr(chk->whoTo);
 5004                         chk->whoTo = NULL;
 5005                 }
 5006                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
 5007                 SCTP_DECR_CHK_COUNT();
 5008                 /* sa_ignore FREED_MEMORY */
 5009         }
 5010         /* sent queue SHOULD be empty */
 5011         TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) {
 5012                 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) {
 5013                         if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) {
 5014                                 asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--;
 5015 #ifdef INVARIANTS
 5016                         } else {
 5017                                 panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number);
 5018 #endif
 5019                         }
 5020                 }
 5021                 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
 5022                 if (chk->data) {
 5023                         if (so) {
 5024                                 /* Still a socket? */
 5025                                 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb,
 5026                                     0, chk, SCTP_SO_LOCKED);
 5027                         }
 5028                         if (chk->data) {
 5029                                 sctp_m_freem(chk->data);
 5030                                 chk->data = NULL;
 5031                         }
 5032                 }
 5033                 if (chk->holds_key_ref)
 5034                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
 5035                 sctp_free_remote_addr(chk->whoTo);
 5036                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
 5037                 SCTP_DECR_CHK_COUNT();
 5038                 /* sa_ignore FREED_MEMORY */
 5039         }
 5040 #ifdef INVARIANTS
 5041         for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
 5042                 if (stcb->asoc.strmout[i].chunks_on_queues > 0) {
 5043                         panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i);
 5044                 }
 5045         }
 5046 #endif
 5047         /* control queue MAY not be empty */
 5048         TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
 5049                 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
 5050                 if (chk->data) {
 5051                         sctp_m_freem(chk->data);
 5052                         chk->data = NULL;
 5053                 }
 5054                 if (chk->holds_key_ref)
 5055                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
 5056                 sctp_free_remote_addr(chk->whoTo);
 5057                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
 5058                 SCTP_DECR_CHK_COUNT();
 5059                 /* sa_ignore FREED_MEMORY */
 5060         }
 5061         /* ASCONF queue MAY not be empty */
 5062         TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
 5063                 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
 5064                 if (chk->data) {
 5065                         sctp_m_freem(chk->data);
 5066                         chk->data = NULL;
 5067                 }
 5068                 if (chk->holds_key_ref)
 5069                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
 5070                 sctp_free_remote_addr(chk->whoTo);
 5071                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
 5072                 SCTP_DECR_CHK_COUNT();
 5073                 /* sa_ignore FREED_MEMORY */
 5074         }
 5075         TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) {
 5076                 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
 5077                 if (chk->data) {
 5078                         sctp_m_freem(chk->data);
 5079                         chk->data = NULL;
 5080                 }
 5081                 if (chk->holds_key_ref)
 5082                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
 5083                 sctp_free_remote_addr(chk->whoTo);
 5084                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
 5085                 SCTP_DECR_CHK_COUNT();
 5086                 /* sa_ignore FREED_MEMORY */
 5087         }
 5088 
 5089         if (asoc->mapping_array) {
 5090                 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
 5091                 asoc->mapping_array = NULL;
 5092         }
 5093         if (asoc->nr_mapping_array) {
 5094                 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
 5095                 asoc->nr_mapping_array = NULL;
 5096         }
 5097         /* the stream outs */
 5098         if (asoc->strmout) {
 5099                 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
 5100                 asoc->strmout = NULL;
 5101         }
 5102         asoc->strm_realoutsize = asoc->streamoutcnt = 0;
 5103         if (asoc->strmin) {
 5104                 struct sctp_queued_to_read *ctl, *nctl;
 5105 
 5106                 for (i = 0; i < asoc->streamincnt; i++) {
 5107                         TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[i].inqueue, next, nctl) {
 5108                                 TAILQ_REMOVE(&asoc->strmin[i].inqueue, ctl, next);
 5109                                 sctp_free_remote_addr(ctl->whoFrom);
 5110                                 if (ctl->data) {
 5111                                         sctp_m_freem(ctl->data);
 5112                                         ctl->data = NULL;
 5113                                 }
 5114                                 /*
 5115                                  * We don't free the address here since all
 5116                                  * the net's were freed above.
 5117                                  */
 5118                                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl);
 5119                                 SCTP_DECR_READQ_COUNT();
 5120                         }
 5121                 }
 5122                 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
 5123                 asoc->strmin = NULL;
 5124         }
 5125         asoc->streamincnt = 0;
 5126         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
 5127 #ifdef INVARIANTS
 5128                 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) {
 5129                         panic("no net's left alloc'ed, or list points to itself");
 5130                 }
 5131 #endif
 5132                 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
 5133                 sctp_free_remote_addr(net);
 5134         }
 5135         LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) {
 5136                 /* sa_ignore FREED_MEMORY */
 5137                 sctp_remove_laddr(laddr);
 5138         }
 5139 
 5140         /* pending asconf (address) parameters */
 5141         TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) {
 5142                 /* sa_ignore FREED_MEMORY */
 5143                 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
 5144                 SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
 5145         }
 5146         TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) {
 5147                 /* sa_ignore FREED_MEMORY */
 5148                 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next);
 5149                 if (aack->data != NULL) {
 5150                         sctp_m_freem(aack->data);
 5151                 }
 5152                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack);
 5153         }
 5154         /* clean up auth stuff */
 5155         if (asoc->local_hmacs)
 5156                 sctp_free_hmaclist(asoc->local_hmacs);
 5157         if (asoc->peer_hmacs)
 5158                 sctp_free_hmaclist(asoc->peer_hmacs);
 5159 
 5160         if (asoc->local_auth_chunks)
 5161                 sctp_free_chunklist(asoc->local_auth_chunks);
 5162         if (asoc->peer_auth_chunks)
 5163                 sctp_free_chunklist(asoc->peer_auth_chunks);
 5164 
 5165         sctp_free_authinfo(&asoc->authinfo);
 5166 
 5167         LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) {
 5168                 LIST_REMOVE(shared_key, next);
 5169                 sctp_free_sharedkey(shared_key);
 5170                 /* sa_ignore FREED_MEMORY */
 5171         }
 5172 
 5173         /* Insert new items here :> */
 5174 
 5175         /* Get rid of LOCK */
 5176         SCTP_TCB_UNLOCK(stcb);
 5177         SCTP_TCB_LOCK_DESTROY(stcb);
 5178         SCTP_TCB_SEND_LOCK_DESTROY(stcb);
 5179         if (from_inpcbfree == SCTP_NORMAL_PROC) {
 5180                 SCTP_INP_INFO_WUNLOCK();
 5181                 SCTP_INP_RLOCK(inp);
 5182         }
 5183 #ifdef SCTP_TRACK_FREED_ASOCS
 5184         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
 5185                 /* now clean up the tasoc itself */
 5186                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
 5187                 SCTP_DECR_ASOC_COUNT();
 5188         } else {
 5189                 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist);
 5190         }
 5191 #else
 5192         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
 5193         SCTP_DECR_ASOC_COUNT();
 5194 #endif
 5195         if (from_inpcbfree == SCTP_NORMAL_PROC) {
 5196                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
 5197                         /*
 5198                          * If its NOT the inp_free calling us AND sctp_close
 5199                          * as been called, we call back...
 5200                          */
 5201                         SCTP_INP_RUNLOCK(inp);
 5202                         /*
 5203                          * This will start the kill timer (if we are the
 5204                          * last one) since we hold an increment yet. But
 5205                          * this is the only safe way to do this since
 5206                          * otherwise if the socket closes at the same time
 5207                          * we are here we might collide in the cleanup.
 5208                          */
 5209                         sctp_inpcb_free(inp,
 5210                             SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE,
 5211                             SCTP_CALLED_DIRECTLY_NOCMPSET);
 5212                         SCTP_INP_DECR_REF(inp);
 5213                         goto out_of;
 5214                 } else {
 5215                         /* The socket is still open. */
 5216                         SCTP_INP_DECR_REF(inp);
 5217                 }
 5218         }
 5219         if (from_inpcbfree == SCTP_NORMAL_PROC) {
 5220                 SCTP_INP_RUNLOCK(inp);
 5221         }
 5222 out_of:
 5223         /* destroyed the asoc */
 5224 #ifdef SCTP_LOG_CLOSING
 5225         sctp_log_closing(inp, NULL, 11);
 5226 #endif
 5227         return (1);
 5228 }
 5229 
 5230 
 5231 
 5232 /*
 5233  * determine if a destination is "reachable" based upon the addresses bound
 5234  * to the current endpoint (e.g. only v4 or v6 currently bound)
 5235  */
 5236 /*
 5237  * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use
 5238  * assoc level v4/v6 flags, as the assoc *may* not have the same address
 5239  * types bound as its endpoint
 5240  */
 5241 int
 5242 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
 5243 {
 5244         struct sctp_inpcb *inp;
 5245         int answer;
 5246 
 5247         /*
 5248          * No locks here, the TCB, in all cases is already locked and an
 5249          * assoc is up. There is either a INP lock by the caller applied (in
 5250          * asconf case when deleting an address) or NOT in the HB case,
 5251          * however if HB then the INP increment is up and the INP will not
 5252          * be removed (on top of the fact that we have a TCB lock). So we
 5253          * only want to read the sctp_flags, which is either bound-all or
 5254          * not.. no protection needed since once an assoc is up you can't be
 5255          * changing your binding.
 5256          */
 5257         inp = stcb->sctp_ep;
 5258         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
 5259                 /* if bound all, destination is not restricted */
 5260                 /*
 5261                  * RRS: Question during lock work: Is this correct? If you
 5262                  * are bound-all you still might need to obey the V4--V6
 5263                  * flags??? IMO this bound-all stuff needs to be removed!
 5264                  */
 5265                 return (1);
 5266         }
 5267         /* NOTE: all "scope" checks are done when local addresses are added */
 5268         switch (destaddr->sa_family) {
 5269 #ifdef INET6
 5270         case AF_INET6:
 5271                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
 5272                 break;
 5273 #endif
 5274 #ifdef INET
 5275         case AF_INET:
 5276                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
 5277                 break;
 5278 #endif
 5279         default:
 5280                 /* invalid family, so it's unreachable */
 5281                 answer = 0;
 5282                 break;
 5283         }
 5284         return (answer);
 5285 }
 5286 
 5287 /*
 5288  * update the inp_vflags on an endpoint
 5289  */
 5290 static void
 5291 sctp_update_ep_vflag(struct sctp_inpcb *inp)
 5292 {
 5293         struct sctp_laddr *laddr;
 5294 
 5295         /* first clear the flag */
 5296         inp->ip_inp.inp.inp_vflag = 0;
 5297         /* set the flag based on addresses on the ep list */
 5298         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
 5299                 if (laddr->ifa == NULL) {
 5300                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
 5301                             __FUNCTION__);
 5302                         continue;
 5303                 }
 5304                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
 5305                         continue;
 5306                 }
 5307                 switch (laddr->ifa->address.sa.sa_family) {
 5308 #ifdef INET6
 5309                 case AF_INET6:
 5310                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
 5311                         break;
 5312 #endif
 5313 #ifdef INET
 5314                 case AF_INET:
 5315                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
 5316                         break;
 5317 #endif
 5318                 default:
 5319                         break;
 5320                 }
 5321         }
 5322 }
 5323 
 5324 /*
 5325  * Add the address to the endpoint local address list There is nothing to be
 5326  * done if we are bound to all addresses
 5327  */
 5328 void
 5329 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action)
 5330 {
 5331         struct sctp_laddr *laddr;
 5332         int fnd, error = 0;
 5333 
 5334         fnd = 0;
 5335 
 5336         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
 5337                 /* You are already bound to all. You have it already */
 5338                 return;
 5339         }
 5340 #ifdef INET6
 5341         if (ifa->address.sa.sa_family == AF_INET6) {
 5342                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
 5343                         /* Can't bind a non-useable addr. */
 5344                         return;
 5345                 }
 5346         }
 5347 #endif
 5348         /* first, is it already present? */
 5349         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
 5350                 if (laddr->ifa == ifa) {
 5351                         fnd = 1;
 5352                         break;
 5353                 }
 5354         }
 5355 
 5356         if (fnd == 0) {
 5357                 /* Not in the ep list */
 5358                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action);
 5359                 if (error != 0)
 5360                         return;
 5361                 inp->laddr_count++;
 5362                 /* update inp_vflag flags */
 5363                 switch (ifa->address.sa.sa_family) {
 5364 #ifdef INET6
 5365                 case AF_INET6:
 5366                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
 5367                         break;
 5368 #endif
 5369 #ifdef INET
 5370                 case AF_INET:
 5371                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
 5372                         break;
 5373 #endif
 5374                 default:
 5375                         break;
 5376                 }
 5377         }
 5378         return;
 5379 }
 5380 
 5381 
 5382 /*
 5383  * select a new (hopefully reachable) destination net (should only be used
 5384  * when we deleted an ep addr that is the only usable source address to reach
 5385  * the destination net)
 5386  */
 5387 static void
 5388 sctp_select_primary_destination(struct sctp_tcb *stcb)
 5389 {
 5390         struct sctp_nets *net;
 5391 
 5392         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 5393                 /* for now, we'll just pick the first reachable one we find */
 5394                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
 5395                         continue;
 5396                 if (sctp_destination_is_reachable(stcb,
 5397                     (struct sockaddr *)&net->ro._l_addr)) {
 5398                         /* found a reachable destination */
 5399                         stcb->asoc.primary_destination = net;
 5400                 }
 5401         }
 5402         /* I can't there from here! ...we're gonna die shortly... */
 5403 }
 5404 
 5405 
 5406 /*
 5407  * Delete the address from the endpoint local address list There is nothing
 5408  * to be done if we are bound to all addresses
 5409  */
 5410 void
 5411 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
 5412 {
 5413         struct sctp_laddr *laddr;
 5414         int fnd;
 5415 
 5416         fnd = 0;
 5417         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
 5418                 /* You are already bound to all. You have it already */
 5419                 return;
 5420         }
 5421         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
 5422                 if (laddr->ifa == ifa) {
 5423                         fnd = 1;
 5424                         break;
 5425                 }
 5426         }
 5427         if (fnd && (inp->laddr_count < 2)) {
 5428                 /* can't delete unless there are at LEAST 2 addresses */
 5429                 return;
 5430         }
 5431         if (fnd) {
 5432                 /*
 5433                  * clean up any use of this address go through our
 5434                  * associations and clear any last_used_address that match
 5435                  * this one for each assoc, see if a new primary_destination
 5436                  * is needed
 5437                  */
 5438                 struct sctp_tcb *stcb;
 5439 
 5440                 /* clean up "next_addr_touse" */
 5441                 if (inp->next_addr_touse == laddr)
 5442                         /* delete this address */
 5443                         inp->next_addr_touse = NULL;
 5444 
 5445                 /* clean up "last_used_address" */
 5446                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
 5447                         struct sctp_nets *net;
 5448 
 5449                         SCTP_TCB_LOCK(stcb);
 5450                         if (stcb->asoc.last_used_address == laddr)
 5451                                 /* delete this address */
 5452                                 stcb->asoc.last_used_address = NULL;
 5453                         /*
 5454                          * Now spin through all the nets and purge any ref
 5455                          * to laddr
 5456                          */
 5457                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 5458                                 if (net->ro._s_addr &&
 5459                                     (net->ro._s_addr->ifa == laddr->ifa)) {
 5460                                         /* Yep, purge src address selected */
 5461                                         sctp_rtentry_t *rt;
 5462 
 5463                                         /* delete this address if cached */
 5464                                         rt = net->ro.ro_rt;
 5465                                         if (rt != NULL) {
 5466                                                 RTFREE(rt);
 5467                                                 net->ro.ro_rt = NULL;
 5468                                         }
 5469                                         sctp_free_ifa(net->ro._s_addr);
 5470                                         net->ro._s_addr = NULL;
 5471                                         net->src_addr_selected = 0;
 5472                                 }
 5473                         }
 5474                         SCTP_TCB_UNLOCK(stcb);
 5475                 }               /* for each tcb */
 5476                 /* remove it from the ep list */
 5477                 sctp_remove_laddr(laddr);
 5478                 inp->laddr_count--;
 5479                 /* update inp_vflag flags */
 5480                 sctp_update_ep_vflag(inp);
 5481         }
 5482         return;
 5483 }
 5484 
 5485 /*
 5486  * Add the address to the TCB local address restricted list.
 5487  * This is a "pending" address list (eg. addresses waiting for an
 5488  * ASCONF-ACK response) and cannot be used as a valid source address.
 5489  */
 5490 void
 5491 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
 5492 {
 5493         struct sctp_laddr *laddr;
 5494         struct sctpladdr *list;
 5495 
 5496         /*
 5497          * Assumes TCB is locked.. and possibly the INP. May need to
 5498          * confirm/fix that if we need it and is not the case.
 5499          */
 5500         list = &stcb->asoc.sctp_restricted_addrs;
 5501 
 5502 #ifdef INET6
 5503         if (ifa->address.sa.sa_family == AF_INET6) {
 5504                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
 5505                         /* Can't bind a non-existent addr. */
 5506                         return;
 5507                 }
 5508         }
 5509 #endif
 5510         /* does the address already exist? */
 5511         LIST_FOREACH(laddr, list, sctp_nxt_addr) {
 5512                 if (laddr->ifa == ifa) {
 5513                         return;
 5514                 }
 5515         }
 5516 
 5517         /* add to the list */
 5518         (void)sctp_insert_laddr(list, ifa, 0);
 5519         return;
 5520 }
 5521 
 5522 /*
 5523  * insert an laddr entry with the given ifa for the desired list
 5524  */
 5525 int
 5526 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act)
 5527 {
 5528         struct sctp_laddr *laddr;
 5529 
 5530         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
 5531         if (laddr == NULL) {
 5532                 /* out of memory? */
 5533                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
 5534                 return (EINVAL);
 5535         }
 5536         SCTP_INCR_LADDR_COUNT();
 5537         bzero(laddr, sizeof(*laddr));
 5538         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
 5539         laddr->ifa = ifa;
 5540         laddr->action = act;
 5541         atomic_add_int(&ifa->refcount, 1);
 5542         /* insert it */
 5543         LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
 5544 
 5545         return (0);
 5546 }
 5547 
 5548 /*
 5549  * Remove an laddr entry from the local address list (on an assoc)
 5550  */
 5551 void
 5552 sctp_remove_laddr(struct sctp_laddr *laddr)
 5553 {
 5554 
 5555         /* remove from the list */
 5556         LIST_REMOVE(laddr, sctp_nxt_addr);
 5557         sctp_free_ifa(laddr->ifa);
 5558         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr);
 5559         SCTP_DECR_LADDR_COUNT();
 5560 }
 5561 
 5562 /*
 5563  * Remove a local address from the TCB local address restricted list
 5564  */
 5565 void
 5566 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
 5567 {
 5568         struct sctp_inpcb *inp;
 5569         struct sctp_laddr *laddr;
 5570 
 5571         /*
 5572          * This is called by asconf work. It is assumed that a) The TCB is
 5573          * locked and b) The INP is locked. This is true in as much as I can
 5574          * trace through the entry asconf code where I did these locks.
 5575          * Again, the ASCONF code is a bit different in that it does lock
 5576          * the INP during its work often times. This must be since we don't
 5577          * want other proc's looking up things while what they are looking
 5578          * up is changing :-D
 5579          */
 5580 
 5581         inp = stcb->sctp_ep;
 5582         /* if subset bound and don't allow ASCONF's, can't delete last */
 5583         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
 5584             sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
 5585                 if (stcb->sctp_ep->laddr_count < 2) {
 5586                         /* can't delete last address */
 5587                         return;
 5588                 }
 5589         }
 5590         LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
 5591                 /* remove the address if it exists */
 5592                 if (laddr->ifa == NULL)
 5593                         continue;
 5594                 if (laddr->ifa == ifa) {
 5595                         sctp_remove_laddr(laddr);
 5596                         return;
 5597                 }
 5598         }
 5599 
 5600         /* address not found! */
 5601         return;
 5602 }
 5603 
 5604 /*
 5605  * Temporarily remove for __APPLE__ until we use the Tiger equivalents
 5606  */
 5607 /* sysctl */
 5608 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
 5609 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
 5610 
 5611 
 5612 
 5613 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
 5614 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL;
 5615 int *sctp_cpuarry = NULL;
 5616 void
 5617 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use)
 5618 {
 5619         /* Queue a packet to a processor for the specified core */
 5620         struct sctp_mcore_queue *qent;
 5621         struct sctp_mcore_ctrl *wkq;
 5622         int need_wake = 0;
 5623 
 5624         if (sctp_mcore_workers == NULL) {
 5625                 /* Something went way bad during setup */
 5626                 sctp_input_with_port(m, off, 0);
 5627                 return;
 5628         }
 5629         SCTP_MALLOC(qent, struct sctp_mcore_queue *,
 5630             (sizeof(struct sctp_mcore_queue)),
 5631             SCTP_M_MCORE);
 5632         if (qent == NULL) {
 5633                 /* This is trouble  */
 5634                 sctp_input_with_port(m, off, 0);
 5635                 return;
 5636         }
 5637         qent->vn = curvnet;
 5638         qent->m = m;
 5639         qent->off = off;
 5640         qent->v6 = 0;
 5641         wkq = &sctp_mcore_workers[cpu_to_use];
 5642         SCTP_MCORE_QLOCK(wkq);
 5643 
 5644         TAILQ_INSERT_TAIL(&wkq->que, qent, next);
 5645         if (wkq->running == 0) {
 5646                 need_wake = 1;
 5647         }
 5648         SCTP_MCORE_QUNLOCK(wkq);
 5649         if (need_wake) {
 5650                 wakeup(&wkq->running);
 5651         }
 5652 }
 5653 
 5654 static void
 5655 sctp_mcore_thread(void *arg)
 5656 {
 5657 
 5658         struct sctp_mcore_ctrl *wkq;
 5659         struct sctp_mcore_queue *qent;
 5660 
 5661         wkq = (struct sctp_mcore_ctrl *)arg;
 5662         struct mbuf *m;
 5663         int off, v6;
 5664 
 5665         /* Wait for first tickle */
 5666         SCTP_MCORE_LOCK(wkq);
 5667         wkq->running = 0;
 5668         msleep(&wkq->running,
 5669             &wkq->core_mtx,
 5670             0, "wait for pkt", 0);
 5671         SCTP_MCORE_UNLOCK(wkq);
 5672 
 5673         /* Bind to our cpu */
 5674         thread_lock(curthread);
 5675         sched_bind(curthread, wkq->cpuid);
 5676         thread_unlock(curthread);
 5677 
 5678         /* Now lets start working */
 5679         SCTP_MCORE_LOCK(wkq);
 5680         /* Now grab lock and go */
 5681         for (;;) {
 5682                 SCTP_MCORE_QLOCK(wkq);
 5683 skip_sleep:
 5684                 wkq->running = 1;
 5685                 qent = TAILQ_FIRST(&wkq->que);
 5686                 if (qent) {
 5687                         TAILQ_REMOVE(&wkq->que, qent, next);
 5688                         SCTP_MCORE_QUNLOCK(wkq);
 5689                         CURVNET_SET(qent->vn);
 5690                         m = qent->m;
 5691                         off = qent->off;
 5692                         v6 = qent->v6;
 5693                         SCTP_FREE(qent, SCTP_M_MCORE);
 5694                         if (v6 == 0) {
 5695                                 sctp_input_with_port(m, off, 0);
 5696                         } else {
 5697                                 SCTP_PRINTF("V6 not yet supported\n");
 5698                                 sctp_m_freem(m);
 5699                         }
 5700                         CURVNET_RESTORE();
 5701                         SCTP_MCORE_QLOCK(wkq);
 5702                 }
 5703                 wkq->running = 0;
 5704                 if (!TAILQ_EMPTY(&wkq->que)) {
 5705                         goto skip_sleep;
 5706                 }
 5707                 SCTP_MCORE_QUNLOCK(wkq);
 5708                 msleep(&wkq->running,
 5709                     &wkq->core_mtx,
 5710                     0, "wait for pkt", 0);
 5711         }
 5712 }
 5713 
 5714 static void
 5715 sctp_startup_mcore_threads(void)
 5716 {
 5717         int i, cpu;
 5718 
 5719         if (mp_ncpus == 1)
 5720                 return;
 5721 
 5722         if (sctp_mcore_workers != NULL) {
 5723                 /*
 5724                  * Already been here in some previous vnet?
 5725                  */
 5726                 return;
 5727         }
 5728         SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *,
 5729             ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)),
 5730             SCTP_M_MCORE);
 5731         if (sctp_mcore_workers == NULL) {
 5732                 /* TSNH I hope */
 5733                 return;
 5734         }
 5735         memset(sctp_mcore_workers, 0, ((mp_maxid + 1) *
 5736             sizeof(struct sctp_mcore_ctrl)));
 5737         /* Init the structures */
 5738         for (i = 0; i <= mp_maxid; i++) {
 5739                 TAILQ_INIT(&sctp_mcore_workers[i].que);
 5740                 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]);
 5741                 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]);
 5742                 sctp_mcore_workers[i].cpuid = i;
 5743         }
 5744         if (sctp_cpuarry == NULL) {
 5745                 SCTP_MALLOC(sctp_cpuarry, int *,
 5746                     (mp_ncpus * sizeof(int)),
 5747                     SCTP_M_MCORE);
 5748                 i = 0;
 5749                 CPU_FOREACH(cpu) {
 5750                         sctp_cpuarry[i] = cpu;
 5751                         i++;
 5752                 }
 5753         }
 5754         /* Now start them all */
 5755         CPU_FOREACH(cpu) {
 5756                 (void)kproc_create(sctp_mcore_thread,
 5757                     (void *)&sctp_mcore_workers[cpu],
 5758                     &sctp_mcore_workers[cpu].thread_proc,
 5759                     RFPROC,
 5760                     SCTP_KTHREAD_PAGES,
 5761                     SCTP_MCORE_NAME);
 5762 
 5763         }
 5764 }
 5765 
 5766 #endif
 5767 
 5768 void
 5769 sctp_pcb_init()
 5770 {
 5771         /*
 5772          * SCTP initialization for the PCB structures should be called by
 5773          * the sctp_init() funciton.
 5774          */
 5775         int i;
 5776         struct timeval tv;
 5777 
 5778         if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) {
 5779                 /* error I was called twice */
 5780                 return;
 5781         }
 5782         SCTP_BASE_VAR(sctp_pcb_initialized) = 1;
 5783 
 5784 #if defined(SCTP_LOCAL_TRACE_BUF)
 5785         bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log));
 5786 #endif
 5787 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
 5788         SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *,
 5789             ((mp_maxid + 1) * sizeof(struct sctpstat)),
 5790             SCTP_M_MCORE);
 5791 #endif
 5792         (void)SCTP_GETTIME_TIMEVAL(&tv);
 5793 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
 5794         bzero(SCTP_BASE_STATS, (sizeof(struct sctpstat) * (mp_maxid + 1)));
 5795         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t) tv.tv_sec;
 5796         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t) tv.tv_usec;
 5797 #else
 5798         bzero(&SCTP_BASE_STATS, sizeof(struct sctpstat));
 5799         SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t) tv.tv_sec;
 5800         SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t) tv.tv_usec;
 5801 #endif
 5802         /* init the empty list of (All) Endpoints */
 5803         LIST_INIT(&SCTP_BASE_INFO(listhead));
 5804 
 5805 
 5806         /* init the hash table of endpoints */
 5807         TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize));
 5808         TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize));
 5809         TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale));
 5810         SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31),
 5811             &SCTP_BASE_INFO(hashasocmark));
 5812         SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
 5813             &SCTP_BASE_INFO(hashmark));
 5814         SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
 5815             &SCTP_BASE_INFO(hashtcpmark));
 5816         SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize);
 5817 
 5818 
 5819         SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH,
 5820             &SCTP_BASE_INFO(hashvrfmark));
 5821 
 5822         SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE,
 5823             &SCTP_BASE_INFO(vrf_ifn_hashmark));
 5824         /* init the zones */
 5825         /*
 5826          * FIX ME: Should check for NULL returns, but if it does fail we are
 5827          * doomed to panic anyways... add later maybe.
 5828          */
 5829         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep",
 5830             sizeof(struct sctp_inpcb), maxsockets);
 5831 
 5832         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc",
 5833             sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
 5834 
 5835         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr",
 5836             sizeof(struct sctp_laddr),
 5837             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
 5838 
 5839         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr",
 5840             sizeof(struct sctp_nets),
 5841             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
 5842 
 5843         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk",
 5844             sizeof(struct sctp_tmit_chunk),
 5845             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
 5846 
 5847         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq",
 5848             sizeof(struct sctp_queued_to_read),
 5849             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
 5850 
 5851         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out",
 5852             sizeof(struct sctp_stream_queue_pending),
 5853             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
 5854 
 5855         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf",
 5856             sizeof(struct sctp_asconf),
 5857             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
 5858 
 5859         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack",
 5860             sizeof(struct sctp_asconf_ack),
 5861             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
 5862 
 5863 
 5864         /* Master Lock INIT for info structure */
 5865         SCTP_INP_INFO_LOCK_INIT();
 5866         SCTP_STATLOG_INIT_LOCK();
 5867 
 5868         SCTP_IPI_COUNT_INIT();
 5869         SCTP_IPI_ADDR_INIT();
 5870 #ifdef SCTP_PACKET_LOGGING
 5871         SCTP_IP_PKTLOG_INIT();
 5872 #endif
 5873         LIST_INIT(&SCTP_BASE_INFO(addr_wq));
 5874 
 5875         SCTP_WQ_ADDR_INIT();
 5876         /* not sure if we need all the counts */
 5877         SCTP_BASE_INFO(ipi_count_ep) = 0;
 5878         /* assoc/tcb zone info */
 5879         SCTP_BASE_INFO(ipi_count_asoc) = 0;
 5880         /* local addrlist zone info */
 5881         SCTP_BASE_INFO(ipi_count_laddr) = 0;
 5882         /* remote addrlist zone info */
 5883         SCTP_BASE_INFO(ipi_count_raddr) = 0;
 5884         /* chunk info */
 5885         SCTP_BASE_INFO(ipi_count_chunk) = 0;
 5886 
 5887         /* socket queue zone info */
 5888         SCTP_BASE_INFO(ipi_count_readq) = 0;
 5889 
 5890         /* stream out queue cont */
 5891         SCTP_BASE_INFO(ipi_count_strmoq) = 0;
 5892 
 5893         SCTP_BASE_INFO(ipi_free_strmoq) = 0;
 5894         SCTP_BASE_INFO(ipi_free_chunks) = 0;
 5895 
 5896         SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer));
 5897 
 5898         /* Init the TIMEWAIT list */
 5899         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
 5900                 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]);
 5901         }
 5902         sctp_startup_iterator();
 5903 
 5904 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
 5905         sctp_startup_mcore_threads();
 5906 #endif
 5907 
 5908         /*
 5909          * INIT the default VRF which for BSD is the only one, other O/S's
 5910          * may have more. But initially they must start with one and then
 5911          * add the VRF's as addresses are added.
 5912          */
 5913         sctp_init_vrf_list(SCTP_DEFAULT_VRF);
 5914 }
 5915 
 5916 /*
 5917  * Assumes that the SCTP_BASE_INFO() lock is NOT held.
 5918  */
 5919 void
 5920 sctp_pcb_finish(void)
 5921 {
 5922         struct sctp_vrflist *vrf_bucket;
 5923         struct sctp_vrf *vrf, *nvrf;
 5924         struct sctp_ifn *ifn, *nifn;
 5925         struct sctp_ifa *ifa, *nifa;
 5926         struct sctpvtaghead *chain;
 5927         struct sctp_tagblock *twait_block, *prev_twait_block;
 5928         struct sctp_laddr *wi, *nwi;
 5929         int i;
 5930         struct sctp_iterator *it, *nit;
 5931 
 5932         /*
 5933          * In FreeBSD the iterator thread never exits but we do clean up.
 5934          * The only way FreeBSD reaches here is if we have VRF's but we
 5935          * still add the ifdef to make it compile on old versions.
 5936          */
 5937         SCTP_IPI_ITERATOR_WQ_LOCK();
 5938         TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
 5939                 if (it->vn != curvnet) {
 5940                         continue;
 5941                 }
 5942                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
 5943                 if (it->function_atend != NULL) {
 5944                         (*it->function_atend) (it->pointer, it->val);
 5945                 }
 5946                 SCTP_FREE(it, SCTP_M_ITER);
 5947         }
 5948         SCTP_IPI_ITERATOR_WQ_UNLOCK();
 5949         SCTP_ITERATOR_LOCK();
 5950         if ((sctp_it_ctl.cur_it) &&
 5951             (sctp_it_ctl.cur_it->vn == curvnet)) {
 5952                 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
 5953         }
 5954         SCTP_ITERATOR_UNLOCK();
 5955         SCTP_OS_TIMER_STOP(&SCTP_BASE_INFO(addr_wq_timer.timer));
 5956         SCTP_WQ_ADDR_LOCK();
 5957         LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) {
 5958                 LIST_REMOVE(wi, sctp_nxt_addr);
 5959                 SCTP_DECR_LADDR_COUNT();
 5960                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi);
 5961         }
 5962         SCTP_WQ_ADDR_UNLOCK();
 5963 
 5964         /*
 5965          * free the vrf/ifn/ifa lists and hashes (be sure address monitor is
 5966          * destroyed first).
 5967          */
 5968         vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))];
 5969         LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) {
 5970                 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) {
 5971                         LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) {
 5972                                 /* free the ifa */
 5973                                 LIST_REMOVE(ifa, next_bucket);
 5974                                 LIST_REMOVE(ifa, next_ifa);
 5975                                 SCTP_FREE(ifa, SCTP_M_IFA);
 5976                         }
 5977                         /* free the ifn */
 5978                         LIST_REMOVE(ifn, next_bucket);
 5979                         LIST_REMOVE(ifn, next_ifn);
 5980                         SCTP_FREE(ifn, SCTP_M_IFN);
 5981                 }
 5982                 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
 5983                 /* free the vrf */
 5984                 LIST_REMOVE(vrf, next_vrf);
 5985                 SCTP_FREE(vrf, SCTP_M_VRF);
 5986         }
 5987         /* free the vrf hashes */
 5988         SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark));
 5989         SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark));
 5990 
 5991         /*
 5992          * free the TIMEWAIT list elements malloc'd in the function
 5993          * sctp_add_vtag_to_timewait()...
 5994          */
 5995         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
 5996                 chain = &SCTP_BASE_INFO(vtag_timewait)[i];
 5997                 if (!LIST_EMPTY(chain)) {
 5998                         prev_twait_block = NULL;
 5999                         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
 6000                                 if (prev_twait_block) {
 6001                                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
 6002                                 }
 6003                                 prev_twait_block = twait_block;
 6004                         }
 6005                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
 6006                 }
 6007         }
 6008 
 6009         /* free the locks and mutexes */
 6010 #ifdef SCTP_PACKET_LOGGING
 6011         SCTP_IP_PKTLOG_DESTROY();
 6012 #endif
 6013         SCTP_IPI_ADDR_DESTROY();
 6014         SCTP_STATLOG_DESTROY();
 6015         SCTP_INP_INFO_LOCK_DESTROY();
 6016 
 6017         SCTP_WQ_ADDR_DESTROY();
 6018 
 6019         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep));
 6020         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc));
 6021         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr));
 6022         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net));
 6023         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk));
 6024         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq));
 6025         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq));
 6026         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf));
 6027         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack));
 6028         /* Get rid of other stuff to */
 6029         if (SCTP_BASE_INFO(sctp_asochash) != NULL)
 6030                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark));
 6031         if (SCTP_BASE_INFO(sctp_ephash) != NULL)
 6032                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark));
 6033         if (SCTP_BASE_INFO(sctp_tcpephash) != NULL)
 6034                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark));
 6035 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
 6036         SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE);
 6037 #endif
 6038 }
 6039 
 6040 
 6041 int
 6042 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
 6043     int offset, int limit,
 6044     struct sockaddr *src, struct sockaddr *dst,
 6045     struct sockaddr *altsa)
 6046 {
 6047         /*
 6048          * grub through the INIT pulling addresses and loading them to the
 6049          * nets structure in the asoc. The from address in the mbuf should
 6050          * also be loaded (if it is not already). This routine can be called
 6051          * with either INIT or INIT-ACK's as long as the m points to the IP
 6052          * packet and the offset points to the beginning of the parameters.
 6053          */
 6054         struct sctp_inpcb *inp;
 6055         struct sctp_nets *net, *nnet, *net_tmp;
 6056         struct sctp_paramhdr *phdr, parm_buf;
 6057         struct sctp_tcb *stcb_tmp;
 6058         uint16_t ptype, plen;
 6059         struct sockaddr *sa;
 6060         uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
 6061         struct sctp_auth_random *p_random = NULL;
 6062         uint16_t random_len = 0;
 6063         uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE];
 6064         struct sctp_auth_hmac_algo *hmacs = NULL;
 6065         uint16_t hmacs_len = 0;
 6066         uint8_t saw_asconf = 0;
 6067         uint8_t saw_asconf_ack = 0;
 6068         uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE];
 6069         struct sctp_auth_chunk_list *chunks = NULL;
 6070         uint16_t num_chunks = 0;
 6071         sctp_key_t *new_key;
 6072         uint32_t keylen;
 6073         int got_random = 0, got_hmacs = 0, got_chklist = 0;
 6074         uint8_t ecn_allowed;
 6075 
 6076 #ifdef INET
 6077         struct sockaddr_in sin;
 6078 
 6079 #endif
 6080 #ifdef INET6
 6081         struct sockaddr_in6 sin6;
 6082 
 6083 #endif
 6084 
 6085         /* First get the destination address setup too. */
 6086 #ifdef INET
 6087         memset(&sin, 0, sizeof(sin));
 6088         sin.sin_family = AF_INET;
 6089         sin.sin_len = sizeof(sin);
 6090         sin.sin_port = stcb->rport;
 6091 #endif
 6092 #ifdef INET6
 6093         memset(&sin6, 0, sizeof(sin6));
 6094         sin6.sin6_family = AF_INET6;
 6095         sin6.sin6_len = sizeof(struct sockaddr_in6);
 6096         sin6.sin6_port = stcb->rport;
 6097 #endif
 6098         if (altsa) {
 6099                 sa = altsa;
 6100         } else {
 6101                 sa = src;
 6102         }
 6103         /* Turn off ECN until we get through all params */
 6104         ecn_allowed = 0;
 6105         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 6106                 /* mark all addresses that we have currently on the list */
 6107                 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
 6108         }
 6109         /* does the source address already exist? if so skip it */
 6110         inp = stcb->sctp_ep;
 6111         atomic_add_int(&stcb->asoc.refcnt, 1);
 6112         stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb);
 6113         atomic_add_int(&stcb->asoc.refcnt, -1);
 6114 
 6115         if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
 6116                 /* we must add the source address */
 6117                 /* no scope set here since we have a tcb already. */
 6118                 switch (sa->sa_family) {
 6119 #ifdef INET
 6120                 case AF_INET:
 6121                         if (stcb->asoc.scope.ipv4_addr_legal) {
 6122                                 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) {
 6123                                         return (-1);
 6124                                 }
 6125                         }
 6126                         break;
 6127 #endif
 6128 #ifdef INET6
 6129                 case AF_INET6:
 6130                         if (stcb->asoc.scope.ipv6_addr_legal) {
 6131                                 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
 6132                                         return (-2);
 6133                                 }
 6134                         }
 6135                         break;
 6136 #endif
 6137                 default:
 6138                         break;
 6139                 }
 6140         } else {
 6141                 if (net_tmp != NULL && stcb_tmp == stcb) {
 6142                         net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
 6143                 } else if (stcb_tmp != stcb) {
 6144                         /* It belongs to another association? */
 6145                         if (stcb_tmp)
 6146                                 SCTP_TCB_UNLOCK(stcb_tmp);
 6147                         return (-3);
 6148                 }
 6149         }
 6150         if (stcb->asoc.state == 0) {
 6151                 /* the assoc was freed? */
 6152                 return (-4);
 6153         }
 6154         /*
 6155          * peer must explicitly turn this on. This may have been initialized
 6156          * to be "on" in order to allow local addr changes while INIT's are
 6157          * in flight.
 6158          */
 6159         stcb->asoc.peer_supports_asconf = 0;
 6160         /* now we must go through each of the params. */
 6161         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
 6162         while (phdr) {
 6163                 ptype = ntohs(phdr->param_type);
 6164                 plen = ntohs(phdr->param_length);
 6165                 /*
 6166                  * SCTP_PRINTF("ptype => %0x, plen => %d\n",
 6167                  * (uint32_t)ptype, (int)plen);
 6168                  */
 6169                 if (offset + plen > limit) {
 6170                         break;
 6171                 }
 6172                 if (plen == 0) {
 6173                         break;
 6174                 }
 6175 #ifdef INET
 6176                 if (ptype == SCTP_IPV4_ADDRESS) {
 6177                         if (stcb->asoc.scope.ipv4_addr_legal) {
 6178                                 struct sctp_ipv4addr_param *p4, p4_buf;
 6179 
 6180                                 /* ok get the v4 address and check/add */
 6181                                 phdr = sctp_get_next_param(m, offset,
 6182                                     (struct sctp_paramhdr *)&p4_buf,
 6183                                     sizeof(p4_buf));
 6184                                 if (plen != sizeof(struct sctp_ipv4addr_param) ||
 6185                                     phdr == NULL) {
 6186                                         return (-5);
 6187                                 }
 6188                                 p4 = (struct sctp_ipv4addr_param *)phdr;
 6189                                 sin.sin_addr.s_addr = p4->addr;
 6190                                 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
 6191                                         /* Skip multi-cast addresses */
 6192                                         goto next_param;
 6193                                 }
 6194                                 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) ||
 6195                                     (sin.sin_addr.s_addr == INADDR_ANY)) {
 6196                                         goto next_param;
 6197                                 }
 6198                                 sa = (struct sockaddr *)&sin;
 6199                                 inp = stcb->sctp_ep;
 6200                                 atomic_add_int(&stcb->asoc.refcnt, 1);
 6201                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
 6202                                     dst, stcb);
 6203                                 atomic_add_int(&stcb->asoc.refcnt, -1);
 6204 
 6205                                 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) ||
 6206                                     inp == NULL) {
 6207                                         /* we must add the source address */
 6208                                         /*
 6209                                          * no scope set since we have a tcb
 6210                                          * already
 6211                                          */
 6212 
 6213                                         /*
 6214                                          * we must validate the state again
 6215                                          * here
 6216                                          */
 6217                         add_it_now:
 6218                                         if (stcb->asoc.state == 0) {
 6219                                                 /* the assoc was freed? */
 6220                                                 return (-7);
 6221                                         }
 6222                                         if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) {
 6223                                                 return (-8);
 6224                                         }
 6225                                 } else if (stcb_tmp == stcb) {
 6226                                         if (stcb->asoc.state == 0) {
 6227                                                 /* the assoc was freed? */
 6228                                                 return (-10);
 6229                                         }
 6230                                         if (net != NULL) {
 6231                                                 /* clear flag */
 6232                                                 net->dest_state &=
 6233                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
 6234                                         }
 6235                                 } else {
 6236                                         /*
 6237                                          * strange, address is in another
 6238                                          * assoc? straighten out locks.
 6239                                          */
 6240                                         if (stcb_tmp) {
 6241                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
 6242                                                         /*
 6243                                                          * in setup state we
 6244                                                          * abort this guy
 6245                                                          */
 6246                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
 6247                                                             stcb_tmp, NULL, SCTP_SO_NOT_LOCKED);
 6248                                                         goto add_it_now;
 6249                                                 }
 6250                                                 SCTP_TCB_UNLOCK(stcb_tmp);
 6251                                         }
 6252                                         if (stcb->asoc.state == 0) {
 6253                                                 /* the assoc was freed? */
 6254                                                 return (-12);
 6255                                         }
 6256                                         return (-13);
 6257                                 }
 6258                         }
 6259                 } else
 6260 #endif
 6261 #ifdef INET6
 6262                 if (ptype == SCTP_IPV6_ADDRESS) {
 6263                         if (stcb->asoc.scope.ipv6_addr_legal) {
 6264                                 /* ok get the v6 address and check/add */
 6265                                 struct sctp_ipv6addr_param *p6, p6_buf;
 6266 
 6267                                 phdr = sctp_get_next_param(m, offset,
 6268                                     (struct sctp_paramhdr *)&p6_buf,
 6269                                     sizeof(p6_buf));
 6270                                 if (plen != sizeof(struct sctp_ipv6addr_param) ||
 6271                                     phdr == NULL) {
 6272                                         return (-14);
 6273                                 }
 6274                                 p6 = (struct sctp_ipv6addr_param *)phdr;
 6275                                 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
 6276                                     sizeof(p6->addr));
 6277                                 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
 6278                                         /* Skip multi-cast addresses */
 6279                                         goto next_param;
 6280                                 }
 6281                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
 6282                                         /*
 6283                                          * Link local make no sense without
 6284                                          * scope
 6285                                          */
 6286                                         goto next_param;
 6287                                 }
 6288                                 sa = (struct sockaddr *)&sin6;
 6289                                 inp = stcb->sctp_ep;
 6290                                 atomic_add_int(&stcb->asoc.refcnt, 1);
 6291                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
 6292                                     dst, stcb);
 6293                                 atomic_add_int(&stcb->asoc.refcnt, -1);
 6294                                 if (stcb_tmp == NULL &&
 6295                                     (inp == stcb->sctp_ep || inp == NULL)) {
 6296                                         /*
 6297                                          * we must validate the state again
 6298                                          * here
 6299                                          */
 6300                         add_it_now6:
 6301                                         if (stcb->asoc.state == 0) {
 6302                                                 /* the assoc was freed? */
 6303                                                 return (-16);
 6304                                         }
 6305                                         /*
 6306                                          * we must add the address, no scope
 6307                                          * set
 6308                                          */
 6309                                         if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) {
 6310                                                 return (-17);
 6311                                         }
 6312                                 } else if (stcb_tmp == stcb) {
 6313                                         /*
 6314                                          * we must validate the state again
 6315                                          * here
 6316                                          */
 6317                                         if (stcb->asoc.state == 0) {
 6318                                                 /* the assoc was freed? */
 6319                                                 return (-19);
 6320                                         }
 6321                                         if (net != NULL) {
 6322                                                 /* clear flag */
 6323                                                 net->dest_state &=
 6324                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
 6325                                         }
 6326                                 } else {
 6327                                         /*
 6328                                          * strange, address is in another
 6329                                          * assoc? straighten out locks.
 6330                                          */
 6331                                         if (stcb_tmp)
 6332                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
 6333                                                         /*
 6334                                                          * in setup state we
 6335                                                          * abort this guy
 6336                                                          */
 6337                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
 6338                                                             stcb_tmp, NULL, SCTP_SO_NOT_LOCKED);
 6339                                                         goto add_it_now6;
 6340                                                 }
 6341                                         SCTP_TCB_UNLOCK(stcb_tmp);
 6342 
 6343                                         if (stcb->asoc.state == 0) {
 6344                                                 /* the assoc was freed? */
 6345                                                 return (-21);
 6346                                         }
 6347                                         return (-22);
 6348                                 }
 6349                         }
 6350                 } else
 6351 #endif
 6352                 if (ptype == SCTP_ECN_CAPABLE) {
 6353                         ecn_allowed = 1;
 6354                 } else if (ptype == SCTP_ULP_ADAPTATION) {
 6355                         if (stcb->asoc.state != SCTP_STATE_OPEN) {
 6356                                 struct sctp_adaptation_layer_indication ai,
 6357                                                                 *aip;
 6358 
 6359                                 phdr = sctp_get_next_param(m, offset,
 6360                                     (struct sctp_paramhdr *)&ai, sizeof(ai));
 6361                                 aip = (struct sctp_adaptation_layer_indication *)phdr;
 6362                                 if (aip) {
 6363                                         stcb->asoc.peers_adaptation = ntohl(aip->indication);
 6364                                         stcb->asoc.adaptation_needed = 1;
 6365                                 }
 6366                         }
 6367                 } else if (ptype == SCTP_SET_PRIM_ADDR) {
 6368                         struct sctp_asconf_addr_param lstore, *fee;
 6369                         int lptype;
 6370                         struct sockaddr *lsa = NULL;
 6371 
 6372 #ifdef INET
 6373                         struct sctp_asconf_addrv4_param *fii;
 6374 
 6375 #endif
 6376 
 6377                         stcb->asoc.peer_supports_asconf = 1;
 6378                         if (plen > sizeof(lstore)) {
 6379                                 return (-23);
 6380                         }
 6381                         phdr = sctp_get_next_param(m, offset,
 6382                             (struct sctp_paramhdr *)&lstore,
 6383                             min(plen, sizeof(lstore)));
 6384                         if (phdr == NULL) {
 6385                                 return (-24);
 6386                         }
 6387                         fee = (struct sctp_asconf_addr_param *)phdr;
 6388                         lptype = ntohs(fee->addrp.ph.param_type);
 6389                         switch (lptype) {
 6390 #ifdef INET
 6391                         case SCTP_IPV4_ADDRESS:
 6392                                 if (plen !=
 6393                                     sizeof(struct sctp_asconf_addrv4_param)) {
 6394                                         SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n",
 6395                                             (int)sizeof(struct sctp_asconf_addrv4_param),
 6396                                             plen);
 6397                                 } else {
 6398                                         fii = (struct sctp_asconf_addrv4_param *)fee;
 6399                                         sin.sin_addr.s_addr = fii->addrp.addr;
 6400                                         lsa = (struct sockaddr *)&sin;
 6401                                 }
 6402                                 break;
 6403 #endif
 6404 #ifdef INET6
 6405                         case SCTP_IPV6_ADDRESS:
 6406                                 if (plen !=
 6407                                     sizeof(struct sctp_asconf_addr_param)) {
 6408                                         SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
 6409                                             (int)sizeof(struct sctp_asconf_addr_param),
 6410                                             plen);
 6411                                 } else {
 6412                                         memcpy(sin6.sin6_addr.s6_addr,
 6413                                             fee->addrp.addr,
 6414                                             sizeof(fee->addrp.addr));
 6415                                         lsa = (struct sockaddr *)&sin6;
 6416                                 }
 6417                                 break;
 6418 #endif
 6419                         default:
 6420                                 break;
 6421                         }
 6422                         if (lsa) {
 6423                                 (void)sctp_set_primary_addr(stcb, sa, NULL);
 6424                         }
 6425                 } else if (ptype == SCTP_HAS_NAT_SUPPORT) {
 6426                         stcb->asoc.peer_supports_nat = 1;
 6427                 } else if (ptype == SCTP_PRSCTP_SUPPORTED) {
 6428                         /* Peer supports pr-sctp */
 6429                         stcb->asoc.peer_supports_prsctp = 1;
 6430                 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
 6431                         /* A supported extension chunk */
 6432                         struct sctp_supported_chunk_types_param *pr_supported;
 6433                         uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
 6434                         int num_ent, i;
 6435 
 6436                         phdr = sctp_get_next_param(m, offset,
 6437                             (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen));
 6438                         if (phdr == NULL) {
 6439                                 return (-25);
 6440                         }
 6441                         stcb->asoc.peer_supports_asconf = 0;
 6442                         stcb->asoc.peer_supports_prsctp = 0;
 6443                         stcb->asoc.peer_supports_pktdrop = 0;
 6444                         stcb->asoc.peer_supports_strreset = 0;
 6445                         stcb->asoc.peer_supports_nr_sack = 0;
 6446                         stcb->asoc.peer_supports_auth = 0;
 6447                         pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
 6448                         num_ent = plen - sizeof(struct sctp_paramhdr);
 6449                         for (i = 0; i < num_ent; i++) {
 6450                                 switch (pr_supported->chunk_types[i]) {
 6451                                 case SCTP_ASCONF:
 6452                                 case SCTP_ASCONF_ACK:
 6453                                         stcb->asoc.peer_supports_asconf = 1;
 6454                                         break;
 6455                                 case SCTP_FORWARD_CUM_TSN:
 6456                                         stcb->asoc.peer_supports_prsctp = 1;
 6457                                         break;
 6458                                 case SCTP_PACKET_DROPPED:
 6459                                         stcb->asoc.peer_supports_pktdrop = 1;
 6460                                         break;
 6461                                 case SCTP_NR_SELECTIVE_ACK:
 6462                                         stcb->asoc.peer_supports_nr_sack = 1;
 6463                                         break;
 6464                                 case SCTP_STREAM_RESET:
 6465                                         stcb->asoc.peer_supports_strreset = 1;
 6466                                         break;
 6467                                 case SCTP_AUTHENTICATION:
 6468                                         stcb->asoc.peer_supports_auth = 1;
 6469                                         break;
 6470                                 default:
 6471                                         /* one I have not learned yet */
 6472                                         break;
 6473 
 6474                                 }
 6475                         }
 6476                 } else if (ptype == SCTP_RANDOM) {
 6477                         if (plen > sizeof(random_store))
 6478                                 break;
 6479                         if (got_random) {
 6480                                 /* already processed a RANDOM */
 6481                                 goto next_param;
 6482                         }
 6483                         phdr = sctp_get_next_param(m, offset,
 6484                             (struct sctp_paramhdr *)random_store,
 6485                             min(sizeof(random_store), plen));
 6486                         if (phdr == NULL)
 6487                                 return (-26);
 6488                         p_random = (struct sctp_auth_random *)phdr;
 6489                         random_len = plen - sizeof(*p_random);
 6490                         /* enforce the random length */
 6491                         if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) {
 6492                                 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n");
 6493                                 return (-27);
 6494                         }
 6495                         got_random = 1;
 6496                 } else if (ptype == SCTP_HMAC_LIST) {
 6497                         int num_hmacs;
 6498                         int i;
 6499 
 6500                         if (plen > sizeof(hmacs_store))
 6501                                 break;
 6502                         if (got_hmacs) {
 6503                                 /* already processed a HMAC list */
 6504                                 goto next_param;
 6505                         }
 6506                         phdr = sctp_get_next_param(m, offset,
 6507                             (struct sctp_paramhdr *)hmacs_store,
 6508                             min(plen, sizeof(hmacs_store)));
 6509                         if (phdr == NULL)
 6510                                 return (-28);
 6511                         hmacs = (struct sctp_auth_hmac_algo *)phdr;
 6512                         hmacs_len = plen - sizeof(*hmacs);
 6513                         num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
 6514                         /* validate the hmac list */
 6515                         if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
 6516                                 return (-29);
 6517                         }
 6518                         if (stcb->asoc.peer_hmacs != NULL)
 6519                                 sctp_free_hmaclist(stcb->asoc.peer_hmacs);
 6520                         stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs);
 6521                         if (stcb->asoc.peer_hmacs != NULL) {
 6522                                 for (i = 0; i < num_hmacs; i++) {
 6523                                         (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs,
 6524                                             ntohs(hmacs->hmac_ids[i]));
 6525                                 }
 6526                         }
 6527                         got_hmacs = 1;
 6528                 } else if (ptype == SCTP_CHUNK_LIST) {
 6529                         int i;
 6530 
 6531                         if (plen > sizeof(chunks_store))
 6532                                 break;
 6533                         if (got_chklist) {
 6534                                 /* already processed a Chunks list */
 6535                                 goto next_param;
 6536                         }
 6537                         phdr = sctp_get_next_param(m, offset,
 6538                             (struct sctp_paramhdr *)chunks_store,
 6539                             min(plen, sizeof(chunks_store)));
 6540                         if (phdr == NULL)
 6541                                 return (-30);
 6542                         chunks = (struct sctp_auth_chunk_list *)phdr;
 6543                         num_chunks = plen - sizeof(*chunks);
 6544                         if (stcb->asoc.peer_auth_chunks != NULL)
 6545                                 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks);
 6546                         else
 6547                                 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist();
 6548                         for (i = 0; i < num_chunks; i++) {
 6549                                 (void)sctp_auth_add_chunk(chunks->chunk_types[i],
 6550                                     stcb->asoc.peer_auth_chunks);
 6551                                 /* record asconf/asconf-ack if listed */
 6552                                 if (chunks->chunk_types[i] == SCTP_ASCONF)
 6553                                         saw_asconf = 1;
 6554                                 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK)
 6555                                         saw_asconf_ack = 1;
 6556 
 6557                         }
 6558                         got_chklist = 1;
 6559                 } else if ((ptype == SCTP_HEARTBEAT_INFO) ||
 6560                             (ptype == SCTP_STATE_COOKIE) ||
 6561                             (ptype == SCTP_UNRECOG_PARAM) ||
 6562                             (ptype == SCTP_COOKIE_PRESERVE) ||
 6563                             (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
 6564                             (ptype == SCTP_ADD_IP_ADDRESS) ||
 6565                             (ptype == SCTP_DEL_IP_ADDRESS) ||
 6566                             (ptype == SCTP_ERROR_CAUSE_IND) ||
 6567                     (ptype == SCTP_SUCCESS_REPORT)) {
 6568                          /* don't care */ ;
 6569                 } else {
 6570                         if ((ptype & 0x8000) == 0x0000) {
 6571                                 /*
 6572                                  * must stop processing the rest of the
 6573                                  * param's. Any report bits were handled
 6574                                  * with the call to
 6575                                  * sctp_arethere_unrecognized_parameters()
 6576                                  * when the INIT or INIT-ACK was first seen.
 6577                                  */
 6578                                 break;
 6579                         }
 6580                 }
 6581 
 6582 next_param:
 6583                 offset += SCTP_SIZE32(plen);
 6584                 if (offset >= limit) {
 6585                         break;
 6586                 }
 6587                 phdr = sctp_get_next_param(m, offset, &parm_buf,
 6588                     sizeof(parm_buf));
 6589         }
 6590         /* Now check to see if we need to purge any addresses */
 6591         TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) {
 6592                 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
 6593                     SCTP_ADDR_NOT_IN_ASSOC) {
 6594                         /* This address has been removed from the asoc */
 6595                         /* remove and free it */
 6596                         stcb->asoc.numnets--;
 6597                         TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
 6598                         sctp_free_remote_addr(net);
 6599                         if (net == stcb->asoc.primary_destination) {
 6600                                 stcb->asoc.primary_destination = NULL;
 6601                                 sctp_select_primary_destination(stcb);
 6602                         }
 6603                 }
 6604         }
 6605         if (ecn_allowed == 0) {
 6606                 stcb->asoc.ecn_allowed = 0;
 6607         }
 6608         /* validate authentication required parameters */
 6609         if (got_random && got_hmacs) {
 6610                 stcb->asoc.peer_supports_auth = 1;
 6611         } else {
 6612                 stcb->asoc.peer_supports_auth = 0;
 6613         }
 6614         if (!stcb->asoc.peer_supports_auth && got_chklist) {
 6615                 /* peer does not support auth but sent a chunks list? */
 6616                 return (-31);
 6617         }
 6618         if (!SCTP_BASE_SYSCTL(sctp_asconf_auth_nochk) && stcb->asoc.peer_supports_asconf &&
 6619             !stcb->asoc.peer_supports_auth) {
 6620                 /* peer supports asconf but not auth? */
 6621                 return (-32);
 6622         } else if ((stcb->asoc.peer_supports_asconf) && (stcb->asoc.peer_supports_auth) &&
 6623             ((saw_asconf == 0) || (saw_asconf_ack == 0))) {
 6624                 return (-33);
 6625         }
 6626         /* concatenate the full random key */
 6627         keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len;
 6628         if (chunks != NULL) {
 6629                 keylen += sizeof(*chunks) + num_chunks;
 6630         }
 6631         new_key = sctp_alloc_key(keylen);
 6632         if (new_key != NULL) {
 6633                 /* copy in the RANDOM */
 6634                 if (p_random != NULL) {
 6635                         keylen = sizeof(*p_random) + random_len;
 6636                         bcopy(p_random, new_key->key, keylen);
 6637                 }
 6638                 /* append in the AUTH chunks */
 6639                 if (chunks != NULL) {
 6640                         bcopy(chunks, new_key->key + keylen,
 6641                             sizeof(*chunks) + num_chunks);
 6642                         keylen += sizeof(*chunks) + num_chunks;
 6643                 }
 6644                 /* append in the HMACs */
 6645                 if (hmacs != NULL) {
 6646                         bcopy(hmacs, new_key->key + keylen,
 6647                             sizeof(*hmacs) + hmacs_len);
 6648                 }
 6649         } else {
 6650                 /* failed to get memory for the key */
 6651                 return (-34);
 6652         }
 6653         if (stcb->asoc.authinfo.peer_random != NULL)
 6654                 sctp_free_key(stcb->asoc.authinfo.peer_random);
 6655         stcb->asoc.authinfo.peer_random = new_key;
 6656         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
 6657         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
 6658 
 6659         return (0);
 6660 }
 6661 
 6662 int
 6663 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
 6664     struct sctp_nets *net)
 6665 {
 6666         /* make sure the requested primary address exists in the assoc */
 6667         if (net == NULL && sa)
 6668                 net = sctp_findnet(stcb, sa);
 6669 
 6670         if (net == NULL) {
 6671                 /* didn't find the requested primary address! */
 6672                 return (-1);
 6673         } else {
 6674                 /* set the primary address */
 6675                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
 6676                         /* Must be confirmed, so queue to set */
 6677                         net->dest_state |= SCTP_ADDR_REQ_PRIMARY;
 6678                         return (0);
 6679                 }
 6680                 stcb->asoc.primary_destination = net;
 6681                 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) {
 6682                         sctp_free_remote_addr(stcb->asoc.alternate);
 6683                         stcb->asoc.alternate = NULL;
 6684                 }
 6685                 net = TAILQ_FIRST(&stcb->asoc.nets);
 6686                 if (net != stcb->asoc.primary_destination) {
 6687                         /*
 6688                          * first one on the list is NOT the primary
 6689                          * sctp_cmpaddr() is much more efficient if the
 6690                          * primary is the first on the list, make it so.
 6691                          */
 6692                         TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
 6693                         TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
 6694                 }
 6695                 return (0);
 6696         }
 6697 }
 6698 
 6699 int
 6700 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now)
 6701 {
 6702         /*
 6703          * This function serves two purposes. It will see if a TAG can be
 6704          * re-used and return 1 for yes it is ok and 0 for don't use that
 6705          * tag. A secondary function it will do is purge out old tags that
 6706          * can be removed.
 6707          */
 6708         struct sctpvtaghead *chain;
 6709         struct sctp_tagblock *twait_block;
 6710         struct sctpasochead *head;
 6711         struct sctp_tcb *stcb;
 6712         int i;
 6713 
 6714         SCTP_INP_INFO_RLOCK();
 6715         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
 6716             SCTP_BASE_INFO(hashasocmark))];
 6717         if (head == NULL) {
 6718                 /* invalid vtag */
 6719                 goto skip_vtag_check;
 6720         }
 6721         LIST_FOREACH(stcb, head, sctp_asocs) {
 6722                 /*
 6723                  * We choose not to lock anything here. TCB's can't be
 6724                  * removed since we have the read lock, so they can't be
 6725                  * freed on us, same thing for the INP. I may be wrong with
 6726                  * this assumption, but we will go with it for now :-)
 6727                  */
 6728                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
 6729                         continue;
 6730                 }
 6731                 if (stcb->asoc.my_vtag == tag) {
 6732                         /* candidate */
 6733                         if (stcb->rport != rport) {
 6734                                 continue;
 6735                         }
 6736                         if (stcb->sctp_ep->sctp_lport != lport) {
 6737                                 continue;
 6738                         }
 6739                         /* Its a used tag set */
 6740                         SCTP_INP_INFO_RUNLOCK();
 6741                         return (0);
 6742                 }
 6743         }
 6744 skip_vtag_check:
 6745 
 6746         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
 6747         /* Now what about timed wait ? */
 6748         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
 6749                 /*
 6750                  * Block(s) are present, lets see if we have this tag in the
 6751                  * list
 6752                  */
 6753                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
 6754                         if (twait_block->vtag_block[i].v_tag == 0) {
 6755                                 /* not used */
 6756                                 continue;
 6757                         } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire <
 6758                             now->tv_sec) {
 6759                                 /* Audit expires this guy */
 6760                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
 6761                                 twait_block->vtag_block[i].v_tag = 0;
 6762                                 twait_block->vtag_block[i].lport = 0;
 6763                                 twait_block->vtag_block[i].rport = 0;
 6764                         } else if ((twait_block->vtag_block[i].v_tag == tag) &&
 6765                                     (twait_block->vtag_block[i].lport == lport) &&
 6766                             (twait_block->vtag_block[i].rport == rport)) {
 6767                                 /* Bad tag, sorry :< */
 6768                                 SCTP_INP_INFO_RUNLOCK();
 6769                                 return (0);
 6770                         }
 6771                 }
 6772         }
 6773         SCTP_INP_INFO_RUNLOCK();
 6774         return (1);
 6775 }
 6776 
 6777 static void
 6778 sctp_drain_mbufs(struct sctp_tcb *stcb)
 6779 {
 6780         /*
 6781          * We must hunt this association for MBUF's past the cumack (i.e.
 6782          * out of order data that we can renege on).
 6783          */
 6784         struct sctp_association *asoc;
 6785         struct sctp_tmit_chunk *chk, *nchk;
 6786         uint32_t cumulative_tsn_p1;
 6787         struct sctp_queued_to_read *ctl, *nctl;
 6788         int cnt, strmat;
 6789         uint32_t gap, i;
 6790         int fnd = 0;
 6791 
 6792         /* We look for anything larger than the cum-ack + 1 */
 6793 
 6794         asoc = &stcb->asoc;
 6795         if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) {
 6796                 /* none we can reneg on. */
 6797                 return;
 6798         }
 6799         SCTP_STAT_INCR(sctps_protocol_drains_done);
 6800         cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
 6801         cnt = 0;
 6802         /* First look in the re-assembly queue */
 6803         TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) {
 6804                 if (SCTP_TSN_GT(chk->rec.data.TSN_seq, cumulative_tsn_p1)) {
 6805                         /* Yep it is above cum-ack */
 6806                         cnt++;
 6807                         SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.TSN_seq, asoc->mapping_array_base_tsn);
 6808                         asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size);
 6809                         sctp_ucount_decr(asoc->cnt_on_reasm_queue);
 6810                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
 6811                         TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
 6812                         if (chk->data) {
 6813                                 sctp_m_freem(chk->data);
 6814                                 chk->data = NULL;
 6815                         }
 6816                         sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
 6817                 }
 6818         }
 6819         /* Ok that was fun, now we will drain all the inbound streams? */
 6820         for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
 6821                 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].inqueue, next, nctl) {
 6822                         if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) {
 6823                                 /* Yep it is above cum-ack */
 6824                                 cnt++;
 6825                                 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn);
 6826                                 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length);
 6827                                 sctp_ucount_decr(asoc->cnt_on_all_streams);
 6828                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
 6829                                 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, ctl, next);
 6830                                 if (ctl->data) {
 6831                                         sctp_m_freem(ctl->data);
 6832                                         ctl->data = NULL;
 6833                                 }
 6834                                 sctp_free_remote_addr(ctl->whoFrom);
 6835                                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl);
 6836                                 SCTP_DECR_READQ_COUNT();
 6837                         }
 6838                 }
 6839         }
 6840         if (cnt) {
 6841                 /* We must back down to see what the new highest is */
 6842                 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) {
 6843                         SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn);
 6844                         if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) {
 6845                                 asoc->highest_tsn_inside_map = i;
 6846                                 fnd = 1;
 6847                                 break;
 6848                         }
 6849                 }
 6850                 if (!fnd) {
 6851                         asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1;
 6852                 }
 6853                 /*
 6854                  * Question, should we go through the delivery queue? The
 6855                  * only reason things are on here is the app not reading OR
 6856                  * a p-d-api up. An attacker COULD send enough in to
 6857                  * initiate the PD-API and then send a bunch of stuff to
 6858                  * other streams... these would wind up on the delivery
 6859                  * queue.. and then we would not get to them. But in order
 6860                  * to do this I then have to back-track and un-deliver
 6861                  * sequence numbers in streams.. el-yucko. I think for now
 6862                  * we will NOT look at the delivery queue and leave it to be
 6863                  * something to consider later. An alternative would be to
 6864                  * abort the P-D-API with a notification and then deliver
 6865                  * the data.... Or another method might be to keep track of
 6866                  * how many times the situation occurs and if we see a
 6867                  * possible attack underway just abort the association.
 6868                  */
 6869 #ifdef SCTP_DEBUG
 6870                 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt);
 6871 #endif
 6872                 /*
 6873                  * Now do we need to find a new
 6874                  * asoc->highest_tsn_inside_map?
 6875                  */
 6876                 asoc->last_revoke_count = cnt;
 6877                 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
 6878                 /* sa_ignore NO_NULL_CHK */
 6879                 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED);
 6880                 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED);
 6881         }
 6882         /*
 6883          * Another issue, in un-setting the TSN's in the mapping array we
 6884          * DID NOT adjust the highest_tsn marker.  This will cause one of
 6885          * two things to occur. It may cause us to do extra work in checking
 6886          * for our mapping array movement. More importantly it may cause us
 6887          * to SACK every datagram. This may not be a bad thing though since
 6888          * we will recover once we get our cum-ack above and all this stuff
 6889          * we dumped recovered.
 6890          */
 6891 }
 6892 
 6893 void
 6894 sctp_drain()
 6895 {
 6896         /*
 6897          * We must walk the PCB lists for ALL associations here. The system
 6898          * is LOW on MBUF's and needs help. This is where reneging will
 6899          * occur. We really hope this does NOT happen!
 6900          */
 6901         VNET_ITERATOR_DECL(vnet_iter);
 6902         VNET_LIST_RLOCK_NOSLEEP();
 6903         VNET_FOREACH(vnet_iter) {
 6904                 CURVNET_SET(vnet_iter);
 6905                 struct sctp_inpcb *inp;
 6906                 struct sctp_tcb *stcb;
 6907 
 6908                 SCTP_STAT_INCR(sctps_protocol_drain_calls);
 6909                 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) {
 6910 #ifdef VIMAGE
 6911                         continue;
 6912 #else
 6913                         return;
 6914 #endif
 6915                 }
 6916                 SCTP_INP_INFO_RLOCK();
 6917                 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) {
 6918                         /* For each endpoint */
 6919                         SCTP_INP_RLOCK(inp);
 6920                         LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
 6921                                 /* For each association */
 6922                                 SCTP_TCB_LOCK(stcb);
 6923                                 sctp_drain_mbufs(stcb);
 6924                                 SCTP_TCB_UNLOCK(stcb);
 6925                         }
 6926                         SCTP_INP_RUNLOCK(inp);
 6927                 }
 6928                 SCTP_INP_INFO_RUNLOCK();
 6929                 CURVNET_RESTORE();
 6930         }
 6931         VNET_LIST_RUNLOCK_NOSLEEP();
 6932 }
 6933 
 6934 /*
 6935  * start a new iterator
 6936  * iterates through all endpoints and associations based on the pcb_state
 6937  * flags and asoc_state.  "af" (mandatory) is executed for all matching
 6938  * assocs and "ef" (optional) is executed when the iterator completes.
 6939  * "inpf" (optional) is executed for each new endpoint as it is being
 6940  * iterated through. inpe (optional) is called when the inp completes
 6941  * its way through all the stcbs.
 6942  */
 6943 int
 6944 sctp_initiate_iterator(inp_func inpf,
 6945     asoc_func af,
 6946     inp_func inpe,
 6947     uint32_t pcb_state,
 6948     uint32_t pcb_features,
 6949     uint32_t asoc_state,
 6950     void *argp,
 6951     uint32_t argi,
 6952     end_func ef,
 6953     struct sctp_inpcb *s_inp,
 6954     uint8_t chunk_output_off)
 6955 {
 6956         struct sctp_iterator *it = NULL;
 6957 
 6958         if (af == NULL) {
 6959                 return (-1);
 6960         }
 6961         SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator),
 6962             SCTP_M_ITER);
 6963         if (it == NULL) {
 6964                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
 6965                 return (ENOMEM);
 6966         }
 6967         memset(it, 0, sizeof(*it));
 6968         it->function_assoc = af;
 6969         it->function_inp = inpf;
 6970         if (inpf)
 6971                 it->done_current_ep = 0;
 6972         else
 6973                 it->done_current_ep = 1;
 6974         it->function_atend = ef;
 6975         it->pointer = argp;
 6976         it->val = argi;
 6977         it->pcb_flags = pcb_state;
 6978         it->pcb_features = pcb_features;
 6979         it->asoc_state = asoc_state;
 6980         it->function_inp_end = inpe;
 6981         it->no_chunk_output = chunk_output_off;
 6982         it->vn = curvnet;
 6983         if (s_inp) {
 6984                 /* Assume lock is held here */
 6985                 it->inp = s_inp;
 6986                 SCTP_INP_INCR_REF(it->inp);
 6987                 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
 6988         } else {
 6989                 SCTP_INP_INFO_RLOCK();
 6990                 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead));
 6991                 if (it->inp) {
 6992                         SCTP_INP_INCR_REF(it->inp);
 6993                 }
 6994                 SCTP_INP_INFO_RUNLOCK();
 6995                 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
 6996 
 6997         }
 6998         SCTP_IPI_ITERATOR_WQ_LOCK();
 6999 
 7000         TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
 7001         if (sctp_it_ctl.iterator_running == 0) {
 7002                 sctp_wakeup_iterator();
 7003         }
 7004         SCTP_IPI_ITERATOR_WQ_UNLOCK();
 7005         /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */
 7006         return (0);
 7007 }

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