sctp_pcb.c

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    1 /*-
    2  * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved.
    3  * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
    4  * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
    5  *
    6  * Redistribution and use in source and binary forms, with or without
    7  * modification, are permitted provided that the following conditions are met:
    8  *
    9  * a) Redistributions of source code must retain the above copyright notice,
   10  *    this list of conditions and the following disclaimer.
   11  *
   12  * b) Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in
   14  *    the documentation and/or other materials provided with the distribution.
   15  *
   16  * c) Neither the name of Cisco Systems, Inc. nor the names of its
   17  *    contributors may be used to endorse or promote products derived
   18  *    from this software without specific prior written permission.
   19  *
   20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   21  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
   22  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   23  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
   24  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   25  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   26  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   27  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   28  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   29  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
   30  * THE POSSIBILITY OF SUCH DAMAGE.
   31  */
   32 
   33 #include <sys/cdefs.h>
   34 __FBSDID("$FreeBSD: releng/8.4/sys/netinet/sctp_pcb.c 248023 2013-03-08 01:31:14Z tuexen $");
   35 
   36 #include <netinet/sctp_os.h>
   37 #include <sys/proc.h>
   38 #include <netinet/sctp_var.h>
   39 #include <netinet/sctp_sysctl.h>
   40 #include <netinet/sctp_pcb.h>
   41 #include <netinet/sctputil.h>
   42 #include <netinet/sctp.h>
   43 #include <netinet/sctp_header.h>
   44 #include <netinet/sctp_asconf.h>
   45 #include <netinet/sctp_output.h>
   46 #include <netinet/sctp_timer.h>
   47 #include <netinet/sctp_bsd_addr.h>
   48 #include <netinet/sctp_dtrace_define.h>
   49 #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                 sctp_ifap->localifa_flags |= SCTP_BEING_DELETED;
  776                 vrf->total_ifa_count--;
  777                 LIST_REMOVE(sctp_ifap, next_bucket);
  778                 sctp_remove_ifa_from_ifn(sctp_ifap);
  779         }
  780 #ifdef SCTP_DEBUG
  781         else {
  782                 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:",
  783                     ifn_index);
  784                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
  785         }
  786 #endif
  787 
  788 out_now:
  789         SCTP_IPI_ADDR_WUNLOCK();
  790         if (sctp_ifap) {
  791                 struct sctp_laddr *wi;
  792 
  793                 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
  794                 if (wi == NULL) {
  795                         /*
  796                          * Gak, what can we do? We have lost an address
  797                          * change can you say HOSED?
  798                          */
  799                         SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
  800 
  801                         /* Oops, must decrement the count */
  802                         sctp_free_ifa(sctp_ifap);
  803                         return;
  804                 }
  805                 SCTP_INCR_LADDR_COUNT();
  806                 bzero(wi, sizeof(*wi));
  807                 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
  808                 wi->ifa = sctp_ifap;
  809                 wi->action = SCTP_DEL_IP_ADDRESS;
  810                 SCTP_WQ_ADDR_LOCK();
  811                 /*
  812                  * Should this really be a tailq? As it is we will process
  813                  * the newest first :-0
  814                  */
  815                 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
  816                 SCTP_WQ_ADDR_UNLOCK();
  817 
  818                 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
  819                     (struct sctp_inpcb *)NULL,
  820                     (struct sctp_tcb *)NULL,
  821                     (struct sctp_nets *)NULL);
  822         }
  823         return;
  824 }
  825 
  826 
  827 static int
  828 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to)
  829 {
  830         int loopback_scope, ipv4_local_scope, local_scope, site_scope;
  831         int ipv4_addr_legal, ipv6_addr_legal;
  832         struct sctp_vrf *vrf;
  833         struct sctp_ifn *sctp_ifn;
  834         struct sctp_ifa *sctp_ifa;
  835 
  836         loopback_scope = stcb->asoc.scope.loopback_scope;
  837         ipv4_local_scope = stcb->asoc.scope.ipv4_local_scope;
  838         local_scope = stcb->asoc.scope.local_scope;
  839         site_scope = stcb->asoc.scope.site_scope;
  840         ipv4_addr_legal = stcb->asoc.scope.ipv4_addr_legal;
  841         ipv6_addr_legal = stcb->asoc.scope.ipv6_addr_legal;
  842 
  843         SCTP_IPI_ADDR_RLOCK();
  844         vrf = sctp_find_vrf(stcb->asoc.vrf_id);
  845         if (vrf == NULL) {
  846                 /* no vrf, no addresses */
  847                 SCTP_IPI_ADDR_RUNLOCK();
  848                 return (0);
  849         }
  850         if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
  851                 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
  852                         if ((loopback_scope == 0) &&
  853                             SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
  854                                 continue;
  855                         }
  856                         LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
  857                                 if (sctp_is_addr_restricted(stcb, sctp_ifa) &&
  858                                     (!sctp_is_addr_pending(stcb, sctp_ifa))) {
  859                                         /*
  860                                          * We allow pending addresses, where
  861                                          * we have sent an asconf-add to be
  862                                          * considered valid.
  863                                          */
  864                                         continue;
  865                                 }
  866                                 switch (sctp_ifa->address.sa.sa_family) {
  867 #ifdef INET
  868                                 case AF_INET:
  869                                         if (ipv4_addr_legal) {
  870                                                 struct sockaddr_in *sin,
  871                                                            *rsin;
  872 
  873                                                 sin = &sctp_ifa->address.sin;
  874                                                 rsin = (struct sockaddr_in *)to;
  875                                                 if ((ipv4_local_scope == 0) &&
  876                                                     IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
  877                                                         continue;
  878                                                 }
  879                                                 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
  880                                                         SCTP_IPI_ADDR_RUNLOCK();
  881                                                         return (1);
  882                                                 }
  883                                         }
  884                                         break;
  885 #endif
  886 #ifdef INET6
  887                                 case AF_INET6:
  888                                         if (ipv6_addr_legal) {
  889                                                 struct sockaddr_in6 *sin6,
  890                                                             *rsin6;
  891 
  892                                                 sin6 = &sctp_ifa->address.sin6;
  893                                                 rsin6 = (struct sockaddr_in6 *)to;
  894                                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
  895                                                         if (local_scope == 0)
  896                                                                 continue;
  897                                                         if (sin6->sin6_scope_id == 0) {
  898                                                                 if (sa6_recoverscope(sin6) != 0)
  899                                                                         continue;
  900                                                         }
  901                                                 }
  902                                                 if ((site_scope == 0) &&
  903                                                     (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) {
  904                                                         continue;
  905                                                 }
  906                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
  907                                                         SCTP_IPI_ADDR_RUNLOCK();
  908                                                         return (1);
  909                                                 }
  910                                         }
  911                                         break;
  912 #endif
  913                                 default:
  914                                         /* TSNH */
  915                                         break;
  916                                 }
  917                         }
  918                 }
  919         } else {
  920                 struct sctp_laddr *laddr;
  921 
  922                 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
  923                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
  924                                 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
  925                                 continue;
  926                         }
  927                         if (sctp_is_addr_restricted(stcb, laddr->ifa) &&
  928                             (!sctp_is_addr_pending(stcb, laddr->ifa))) {
  929                                 /*
  930                                  * We allow pending addresses, where we have
  931                                  * sent an asconf-add to be considered
  932                                  * valid.
  933                                  */
  934                                 continue;
  935                         }
  936                         if (laddr->ifa->address.sa.sa_family != to->sa_family) {
  937                                 continue;
  938                         }
  939                         switch (to->sa_family) {
  940 #ifdef INET
  941                         case AF_INET:
  942                                 {
  943                                         struct sockaddr_in *sin, *rsin;
  944 
  945                                         sin = (struct sockaddr_in *)&laddr->ifa->address.sin;
  946                                         rsin = (struct sockaddr_in *)to;
  947                                         if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
  948                                                 SCTP_IPI_ADDR_RUNLOCK();
  949                                                 return (1);
  950                                         }
  951                                         break;
  952                                 }
  953 #endif
  954 #ifdef INET6
  955                         case AF_INET6:
  956                                 {
  957                                         struct sockaddr_in6 *sin6, *rsin6;
  958 
  959                                         sin6 = (struct sockaddr_in6 *)&laddr->ifa->address.sin6;
  960                                         rsin6 = (struct sockaddr_in6 *)to;
  961                                         if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
  962                                                 SCTP_IPI_ADDR_RUNLOCK();
  963                                                 return (1);
  964                                         }
  965                                         break;
  966                                 }
  967 
  968 #endif
  969                         default:
  970                                 /* TSNH */
  971                                 break;
  972                         }
  973 
  974                 }
  975         }
  976         SCTP_IPI_ADDR_RUNLOCK();
  977         return (0);
  978 }
  979 
  980 
  981 static struct sctp_tcb *
  982 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from,
  983     struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id)
  984 {
  985         /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */
  986         /*
  987          * If we support the TCP model, then we must now dig through to see
  988          * if we can find our endpoint in the list of tcp ep's.
  989          */
  990         uint16_t lport, rport;
  991         struct sctppcbhead *ephead;
  992         struct sctp_inpcb *inp;
  993         struct sctp_laddr *laddr;
  994         struct sctp_tcb *stcb;
  995         struct sctp_nets *net;
  996 
  997         if ((to == NULL) || (from == NULL)) {
  998                 return (NULL);
  999         }
 1000         switch (to->sa_family) {
 1001 #ifdef INET
 1002         case AF_INET:
 1003                 if (from->sa_family == AF_INET) {
 1004                         lport = ((struct sockaddr_in *)to)->sin_port;
 1005                         rport = ((struct sockaddr_in *)from)->sin_port;
 1006                 } else {
 1007                         return (NULL);
 1008                 }
 1009                 break;
 1010 #endif
 1011 #ifdef INET6
 1012         case AF_INET6:
 1013                 if (from->sa_family == AF_INET6) {
 1014                         lport = ((struct sockaddr_in6 *)to)->sin6_port;
 1015                         rport = ((struct sockaddr_in6 *)from)->sin6_port;
 1016                 } else {
 1017                         return (NULL);
 1018                 }
 1019                 break;
 1020 #endif
 1021         default:
 1022                 return (NULL);
 1023         }
 1024         ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
 1025         /*
 1026          * Ok now for each of the guys in this bucket we must look and see:
 1027          * - Does the remote port match. - Does there single association's
 1028          * addresses match this address (to). If so we update p_ep to point
 1029          * to this ep and return the tcb from it.
 1030          */
 1031         LIST_FOREACH(inp, ephead, sctp_hash) {
 1032                 SCTP_INP_RLOCK(inp);
 1033                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
 1034                         SCTP_INP_RUNLOCK(inp);
 1035                         continue;
 1036                 }
 1037                 if (lport != inp->sctp_lport) {
 1038                         SCTP_INP_RUNLOCK(inp);
 1039                         continue;
 1040                 }
 1041                 if (inp->def_vrf_id != vrf_id) {
 1042                         SCTP_INP_RUNLOCK(inp);
 1043                         continue;
 1044                 }
 1045                 /* check to see if the ep has one of the addresses */
 1046                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
 1047                         /* We are NOT bound all, so look further */
 1048                         int match = 0;
 1049 
 1050                         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
 1051 
 1052                                 if (laddr->ifa == NULL) {
 1053                                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __FUNCTION__);
 1054                                         continue;
 1055                                 }
 1056                                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
 1057                                         SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
 1058                                         continue;
 1059                                 }
 1060                                 if (laddr->ifa->address.sa.sa_family ==
 1061                                     to->sa_family) {
 1062                                         /* see if it matches */
 1063 #ifdef INET
 1064                                         if (from->sa_family == AF_INET) {
 1065                                                 struct sockaddr_in *intf_addr,
 1066                                                            *sin;
 1067 
 1068                                                 intf_addr = &laddr->ifa->address.sin;
 1069                                                 sin = (struct sockaddr_in *)to;
 1070                                                 if (sin->sin_addr.s_addr ==
 1071                                                     intf_addr->sin_addr.s_addr) {
 1072                                                         match = 1;
 1073                                                         break;
 1074                                                 }
 1075                                         }
 1076 #endif
 1077 #ifdef INET6
 1078                                         if (from->sa_family == AF_INET6) {
 1079                                                 struct sockaddr_in6 *intf_addr6;
 1080                                                 struct sockaddr_in6 *sin6;
 1081 
 1082                                                 sin6 = (struct sockaddr_in6 *)
 1083                                                     to;
 1084                                                 intf_addr6 = &laddr->ifa->address.sin6;
 1085 
 1086                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
 1087                                                     intf_addr6)) {
 1088                                                         match = 1;
 1089                                                         break;
 1090                                                 }
 1091                                         }
 1092 #endif
 1093                                 }
 1094                         }
 1095                         if (match == 0) {
 1096                                 /* This endpoint does not have this address */
 1097                                 SCTP_INP_RUNLOCK(inp);
 1098                                 continue;
 1099                         }
 1100                 }
 1101                 /*
 1102                  * Ok if we hit here the ep has the address, does it hold
 1103                  * the tcb?
 1104                  */
 1105                 /* XXX: Why don't we TAILQ_FOREACH through sctp_asoc_list? */
 1106                 stcb = LIST_FIRST(&inp->sctp_asoc_list);
 1107                 if (stcb == NULL) {
 1108                         SCTP_INP_RUNLOCK(inp);
 1109                         continue;
 1110                 }
 1111                 SCTP_TCB_LOCK(stcb);
 1112                 if (!sctp_does_stcb_own_this_addr(stcb, to)) {
 1113                         SCTP_TCB_UNLOCK(stcb);
 1114                         SCTP_INP_RUNLOCK(inp);
 1115                         continue;
 1116                 }
 1117                 if (stcb->rport != rport) {
 1118                         /* remote port does not match. */
 1119                         SCTP_TCB_UNLOCK(stcb);
 1120                         SCTP_INP_RUNLOCK(inp);
 1121                         continue;
 1122                 }
 1123                 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
 1124                         SCTP_TCB_UNLOCK(stcb);
 1125                         SCTP_INP_RUNLOCK(inp);
 1126                         continue;
 1127                 }
 1128                 if (!sctp_does_stcb_own_this_addr(stcb, to)) {
 1129                         SCTP_TCB_UNLOCK(stcb);
 1130                         SCTP_INP_RUNLOCK(inp);
 1131                         continue;
 1132                 }
 1133                 /* Does this TCB have a matching address? */
 1134                 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 1135 
 1136                         if (net->ro._l_addr.sa.sa_family != from->sa_family) {
 1137                                 /* not the same family, can't be a match */
 1138                                 continue;
 1139                         }
 1140                         switch (from->sa_family) {
 1141 #ifdef INET
 1142                         case AF_INET:
 1143                                 {
 1144                                         struct sockaddr_in *sin, *rsin;
 1145 
 1146                                         sin = (struct sockaddr_in *)&net->ro._l_addr;
 1147                                         rsin = (struct sockaddr_in *)from;
 1148                                         if (sin->sin_addr.s_addr ==
 1149                                             rsin->sin_addr.s_addr) {
 1150                                                 /* found it */
 1151                                                 if (netp != NULL) {
 1152                                                         *netp = net;
 1153                                                 }
 1154                                                 /*
 1155                                                  * Update the endpoint
 1156                                                  * pointer
 1157                                                  */
 1158                                                 *inp_p = inp;
 1159                                                 SCTP_INP_RUNLOCK(inp);
 1160                                                 return (stcb);
 1161                                         }
 1162                                         break;
 1163                                 }
 1164 #endif
 1165 #ifdef INET6
 1166                         case AF_INET6:
 1167                                 {
 1168                                         struct sockaddr_in6 *sin6, *rsin6;
 1169 
 1170                                         sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
 1171                                         rsin6 = (struct sockaddr_in6 *)from;
 1172                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
 1173                                             rsin6)) {
 1174                                                 /* found it */
 1175                                                 if (netp != NULL) {
 1176                                                         *netp = net;
 1177                                                 }
 1178                                                 /*
 1179                                                  * Update the endpoint
 1180                                                  * pointer
 1181                                                  */
 1182                                                 *inp_p = inp;
 1183                                                 SCTP_INP_RUNLOCK(inp);
 1184                                                 return (stcb);
 1185                                         }
 1186                                         break;
 1187                                 }
 1188 #endif
 1189                         default:
 1190                                 /* TSNH */
 1191                                 break;
 1192                         }
 1193                 }
 1194                 SCTP_TCB_UNLOCK(stcb);
 1195                 SCTP_INP_RUNLOCK(inp);
 1196         }
 1197         return (NULL);
 1198 }
 1199 
 1200 
 1201 /*
 1202  * rules for use
 1203  *
 1204  * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an
 1205  * stcb, both will be locked (locked_tcb and stcb) but decrement will be done
 1206  * (if locked == NULL). 3) Decrement happens on return ONLY if locked ==
 1207  * NULL.
 1208  */
 1209 
 1210 struct sctp_tcb *
 1211 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote,
 1212     struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb)
 1213 {
 1214         struct sctpasochead *head;
 1215         struct sctp_inpcb *inp;
 1216         struct sctp_tcb *stcb = NULL;
 1217         struct sctp_nets *net;
 1218         uint16_t rport;
 1219 
 1220         inp = *inp_p;
 1221         switch (remote->sa_family) {
 1222 #ifdef INET
 1223         case AF_INET:
 1224                 rport = (((struct sockaddr_in *)remote)->sin_port);
 1225                 break;
 1226 #endif
 1227 #ifdef INET6
 1228         case AF_INET6:
 1229                 rport = (((struct sockaddr_in6 *)remote)->sin6_port);
 1230                 break;
 1231 #endif
 1232         default:
 1233                 return (NULL);
 1234         }
 1235         if (locked_tcb) {
 1236                 /*
 1237                  * UN-lock so we can do proper locking here this occurs when
 1238                  * called from load_addresses_from_init.
 1239                  */
 1240                 atomic_add_int(&locked_tcb->asoc.refcnt, 1);
 1241                 SCTP_TCB_UNLOCK(locked_tcb);
 1242         }
 1243         SCTP_INP_INFO_RLOCK();
 1244         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
 1245             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
 1246                 /*-
 1247                  * Now either this guy is our listener or it's the
 1248                  * connector. If it is the one that issued the connect, then
 1249                  * it's only chance is to be the first TCB in the list. If
 1250                  * it is the acceptor, then do the special_lookup to hash
 1251                  * and find the real inp.
 1252                  */
 1253                 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) {
 1254                         /* to is peer addr, from is my addr */
 1255                         stcb = sctp_tcb_special_locate(inp_p, remote, local,
 1256                             netp, inp->def_vrf_id);
 1257                         if ((stcb != NULL) && (locked_tcb == NULL)) {
 1258                                 /* we have a locked tcb, lower refcount */
 1259                                 SCTP_INP_DECR_REF(inp);
 1260                         }
 1261                         if ((locked_tcb != NULL) && (locked_tcb != stcb)) {
 1262                                 SCTP_INP_RLOCK(locked_tcb->sctp_ep);
 1263                                 SCTP_TCB_LOCK(locked_tcb);
 1264                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
 1265                                 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep);
 1266                         }
 1267                         SCTP_INP_INFO_RUNLOCK();
 1268                         return (stcb);
 1269                 } else {
 1270                         SCTP_INP_WLOCK(inp);
 1271                         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
 1272                                 goto null_return;
 1273                         }
 1274                         stcb = LIST_FIRST(&inp->sctp_asoc_list);
 1275                         if (stcb == NULL) {
 1276                                 goto null_return;
 1277                         }
 1278                         SCTP_TCB_LOCK(stcb);
 1279 
 1280                         if (stcb->rport != rport) {
 1281                                 /* remote port does not match. */
 1282                                 SCTP_TCB_UNLOCK(stcb);
 1283                                 goto null_return;
 1284                         }
 1285                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
 1286                                 SCTP_TCB_UNLOCK(stcb);
 1287                                 goto null_return;
 1288                         }
 1289                         if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
 1290                                 SCTP_TCB_UNLOCK(stcb);
 1291                                 goto null_return;
 1292                         }
 1293                         /* now look at the list of remote addresses */
 1294                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 1295 #ifdef INVARIANTS
 1296                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
 1297                                         panic("Corrupt net list");
 1298                                 }
 1299 #endif
 1300                                 if (net->ro._l_addr.sa.sa_family !=
 1301                                     remote->sa_family) {
 1302                                         /* not the same family */
 1303                                         continue;
 1304                                 }
 1305                                 switch (remote->sa_family) {
 1306 #ifdef INET
 1307                                 case AF_INET:
 1308                                         {
 1309                                                 struct sockaddr_in *sin,
 1310                                                            *rsin;
 1311 
 1312                                                 sin = (struct sockaddr_in *)
 1313                                                     &net->ro._l_addr;
 1314                                                 rsin = (struct sockaddr_in *)remote;
 1315                                                 if (sin->sin_addr.s_addr ==
 1316                                                     rsin->sin_addr.s_addr) {
 1317                                                         /* found it */
 1318                                                         if (netp != NULL) {
 1319                                                                 *netp = net;
 1320                                                         }
 1321                                                         if (locked_tcb == NULL) {
 1322                                                                 SCTP_INP_DECR_REF(inp);
 1323                                                         } else if (locked_tcb != stcb) {
 1324                                                                 SCTP_TCB_LOCK(locked_tcb);
 1325                                                         }
 1326                                                         if (locked_tcb) {
 1327                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
 1328                                                         }
 1329                                                         SCTP_INP_WUNLOCK(inp);
 1330                                                         SCTP_INP_INFO_RUNLOCK();
 1331                                                         return (stcb);
 1332                                                 }
 1333                                                 break;
 1334                                         }
 1335 #endif
 1336 #ifdef INET6
 1337                                 case AF_INET6:
 1338                                         {
 1339                                                 struct sockaddr_in6 *sin6,
 1340                                                             *rsin6;
 1341 
 1342                                                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
 1343                                                 rsin6 = (struct sockaddr_in6 *)remote;
 1344                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
 1345                                                     rsin6)) {
 1346                                                         /* found it */
 1347                                                         if (netp != NULL) {
 1348                                                                 *netp = net;
 1349                                                         }
 1350                                                         if (locked_tcb == NULL) {
 1351                                                                 SCTP_INP_DECR_REF(inp);
 1352                                                         } else if (locked_tcb != stcb) {
 1353                                                                 SCTP_TCB_LOCK(locked_tcb);
 1354                                                         }
 1355                                                         if (locked_tcb) {
 1356                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
 1357                                                         }
 1358                                                         SCTP_INP_WUNLOCK(inp);
 1359                                                         SCTP_INP_INFO_RUNLOCK();
 1360                                                         return (stcb);
 1361                                                 }
 1362                                                 break;
 1363                                         }
 1364 #endif
 1365                                 default:
 1366                                         /* TSNH */
 1367                                         break;
 1368                                 }
 1369                         }
 1370                         SCTP_TCB_UNLOCK(stcb);
 1371                 }
 1372         } else {
 1373                 SCTP_INP_WLOCK(inp);
 1374                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
 1375                         goto null_return;
 1376                 }
 1377                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport,
 1378                     inp->sctp_hashmark)];
 1379                 if (head == NULL) {
 1380                         goto null_return;
 1381                 }
 1382                 LIST_FOREACH(stcb, head, sctp_tcbhash) {
 1383                         if (stcb->rport != rport) {
 1384                                 /* remote port does not match */
 1385                                 continue;
 1386                         }
 1387                         SCTP_TCB_LOCK(stcb);
 1388                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
 1389                                 SCTP_TCB_UNLOCK(stcb);
 1390                                 continue;
 1391                         }
 1392                         if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
 1393                                 SCTP_TCB_UNLOCK(stcb);
 1394                                 continue;
 1395                         }
 1396                         /* now look at the list of remote addresses */
 1397                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 1398 #ifdef INVARIANTS
 1399                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
 1400                                         panic("Corrupt net list");
 1401                                 }
 1402 #endif
 1403                                 if (net->ro._l_addr.sa.sa_family !=
 1404                                     remote->sa_family) {
 1405                                         /* not the same family */
 1406                                         continue;
 1407                                 }
 1408                                 switch (remote->sa_family) {
 1409 #ifdef INET
 1410                                 case AF_INET:
 1411                                         {
 1412                                                 struct sockaddr_in *sin,
 1413                                                            *rsin;
 1414 
 1415                                                 sin = (struct sockaddr_in *)
 1416                                                     &net->ro._l_addr;
 1417                                                 rsin = (struct sockaddr_in *)remote;
 1418                                                 if (sin->sin_addr.s_addr ==
 1419                                                     rsin->sin_addr.s_addr) {
 1420                                                         /* found it */
 1421                                                         if (netp != NULL) {
 1422                                                                 *netp = net;
 1423                                                         }
 1424                                                         if (locked_tcb == NULL) {
 1425                                                                 SCTP_INP_DECR_REF(inp);
 1426                                                         } else if (locked_tcb != stcb) {
 1427                                                                 SCTP_TCB_LOCK(locked_tcb);
 1428                                                         }
 1429                                                         if (locked_tcb) {
 1430                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
 1431                                                         }
 1432                                                         SCTP_INP_WUNLOCK(inp);
 1433                                                         SCTP_INP_INFO_RUNLOCK();
 1434                                                         return (stcb);
 1435                                                 }
 1436                                                 break;
 1437                                         }
 1438 #endif
 1439 #ifdef INET6
 1440                                 case AF_INET6:
 1441                                         {
 1442                                                 struct sockaddr_in6 *sin6,
 1443                                                             *rsin6;
 1444 
 1445                                                 sin6 = (struct sockaddr_in6 *)
 1446                                                     &net->ro._l_addr;
 1447                                                 rsin6 = (struct sockaddr_in6 *)remote;
 1448                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
 1449                                                     rsin6)) {
 1450                                                         /* found it */
 1451                                                         if (netp != NULL) {
 1452                                                                 *netp = net;
 1453                                                         }
 1454                                                         if (locked_tcb == NULL) {
 1455                                                                 SCTP_INP_DECR_REF(inp);
 1456                                                         } else if (locked_tcb != stcb) {
 1457                                                                 SCTP_TCB_LOCK(locked_tcb);
 1458                                                         }
 1459                                                         if (locked_tcb) {
 1460                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
 1461                                                         }
 1462                                                         SCTP_INP_WUNLOCK(inp);
 1463                                                         SCTP_INP_INFO_RUNLOCK();
 1464                                                         return (stcb);
 1465                                                 }
 1466                                                 break;
 1467                                         }
 1468 #endif
 1469                                 default:
 1470                                         /* TSNH */
 1471                                         break;
 1472                                 }
 1473                         }
 1474                         SCTP_TCB_UNLOCK(stcb);
 1475                 }
 1476         }
 1477 null_return:
 1478         /* clean up for returning null */
 1479         if (locked_tcb) {
 1480                 SCTP_TCB_LOCK(locked_tcb);
 1481                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
 1482         }
 1483         SCTP_INP_WUNLOCK(inp);
 1484         SCTP_INP_INFO_RUNLOCK();
 1485         /* not found */
 1486         return (NULL);
 1487 }
 1488 
 1489 
 1490 /*
 1491  * Find an association for a specific endpoint using the association id given
 1492  * out in the COMM_UP notification
 1493  */
 1494 struct sctp_tcb *
 1495 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
 1496 {
 1497         /*
 1498          * Use my the assoc_id to find a endpoint
 1499          */
 1500         struct sctpasochead *head;
 1501         struct sctp_tcb *stcb;
 1502         uint32_t id;
 1503 
 1504         if (inp == NULL) {
 1505                 SCTP_PRINTF("TSNH ep_associd\n");
 1506                 return (NULL);
 1507         }
 1508         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
 1509                 SCTP_PRINTF("TSNH ep_associd0\n");
 1510                 return (NULL);
 1511         }
 1512         id = (uint32_t) asoc_id;
 1513         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
 1514         if (head == NULL) {
 1515                 /* invalid id TSNH */
 1516                 SCTP_PRINTF("TSNH ep_associd1\n");
 1517                 return (NULL);
 1518         }
 1519         LIST_FOREACH(stcb, head, sctp_tcbasocidhash) {
 1520                 if (stcb->asoc.assoc_id == id) {
 1521                         if (inp != stcb->sctp_ep) {
 1522                                 /*
 1523                                  * some other guy has the same id active (id
 1524                                  * collision ??).
 1525                                  */
 1526                                 SCTP_PRINTF("TSNH ep_associd2\n");
 1527                                 continue;
 1528                         }
 1529                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
 1530                                 continue;
 1531                         }
 1532                         if (want_lock) {
 1533                                 SCTP_TCB_LOCK(stcb);
 1534                         }
 1535                         return (stcb);
 1536                 }
 1537         }
 1538         return (NULL);
 1539 }
 1540 
 1541 
 1542 struct sctp_tcb *
 1543 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
 1544 {
 1545         struct sctp_tcb *stcb;
 1546 
 1547         SCTP_INP_RLOCK(inp);
 1548         stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock);
 1549         SCTP_INP_RUNLOCK(inp);
 1550         return (stcb);
 1551 }
 1552 
 1553 
 1554 /*
 1555  * Endpoint probe expects that the INP_INFO is locked.
 1556  */
 1557 static struct sctp_inpcb *
 1558 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head,
 1559     uint16_t lport, uint32_t vrf_id)
 1560 {
 1561         struct sctp_inpcb *inp;
 1562         struct sctp_laddr *laddr;
 1563 
 1564 #ifdef INET
 1565         struct sockaddr_in *sin;
 1566 
 1567 #endif
 1568 #ifdef INET6
 1569         struct sockaddr_in6 *sin6;
 1570         struct sockaddr_in6 *intf_addr6;
 1571 
 1572 #endif
 1573         int fnd;
 1574 
 1575 #ifdef INET
 1576         sin = NULL;
 1577 #endif
 1578 #ifdef INET6
 1579         sin6 = NULL;
 1580 #endif
 1581         switch (nam->sa_family) {
 1582 #ifdef INET
 1583         case AF_INET:
 1584                 sin = (struct sockaddr_in *)nam;
 1585                 break;
 1586 #endif
 1587 #ifdef INET6
 1588         case AF_INET6:
 1589                 sin6 = (struct sockaddr_in6 *)nam;
 1590                 break;
 1591 #endif
 1592         default:
 1593                 /* unsupported family */
 1594                 return (NULL);
 1595         }
 1596 
 1597         if (head == NULL)
 1598                 return (NULL);
 1599 
 1600         LIST_FOREACH(inp, head, sctp_hash) {
 1601                 SCTP_INP_RLOCK(inp);
 1602                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
 1603                         SCTP_INP_RUNLOCK(inp);
 1604                         continue;
 1605                 }
 1606                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) &&
 1607                     (inp->sctp_lport == lport)) {
 1608                         /* got it */
 1609 #ifdef INET
 1610                         if ((nam->sa_family == AF_INET) &&
 1611                             (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
 1612                             SCTP_IPV6_V6ONLY(inp)) {
 1613                                 /* IPv4 on a IPv6 socket with ONLY IPv6 set */
 1614                                 SCTP_INP_RUNLOCK(inp);
 1615                                 continue;
 1616                         }
 1617 #endif
 1618 #ifdef INET6
 1619                         /* A V6 address and the endpoint is NOT bound V6 */
 1620                         if (nam->sa_family == AF_INET6 &&
 1621                             (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
 1622                                 SCTP_INP_RUNLOCK(inp);
 1623                                 continue;
 1624                         }
 1625 #endif
 1626                         /* does a VRF id match? */
 1627                         fnd = 0;
 1628                         if (inp->def_vrf_id == vrf_id)
 1629                                 fnd = 1;
 1630 
 1631                         SCTP_INP_RUNLOCK(inp);
 1632                         if (!fnd)
 1633                                 continue;
 1634                         return (inp);
 1635                 }
 1636                 SCTP_INP_RUNLOCK(inp);
 1637         }
 1638         switch (nam->sa_family) {
 1639 #ifdef INET
 1640         case AF_INET:
 1641                 if (sin->sin_addr.s_addr == INADDR_ANY) {
 1642                         /* Can't hunt for one that has no address specified */
 1643                         return (NULL);
 1644                 }
 1645                 break;
 1646 #endif
 1647 #ifdef INET6
 1648         case AF_INET6:
 1649                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
 1650                         /* Can't hunt for one that has no address specified */
 1651                         return (NULL);
 1652                 }
 1653                 break;
 1654 #endif
 1655         default:
 1656                 break;
 1657         }
 1658         /*
 1659          * ok, not bound to all so see if we can find a EP bound to this
 1660          * address.
 1661          */
 1662         LIST_FOREACH(inp, head, sctp_hash) {
 1663                 SCTP_INP_RLOCK(inp);
 1664                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
 1665                         SCTP_INP_RUNLOCK(inp);
 1666                         continue;
 1667                 }
 1668                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) {
 1669                         SCTP_INP_RUNLOCK(inp);
 1670                         continue;
 1671                 }
 1672                 /*
 1673                  * Ok this could be a likely candidate, look at all of its
 1674                  * addresses
 1675                  */
 1676                 if (inp->sctp_lport != lport) {
 1677                         SCTP_INP_RUNLOCK(inp);
 1678                         continue;
 1679                 }
 1680                 /* does a VRF id match? */
 1681                 fnd = 0;
 1682                 if (inp->def_vrf_id == vrf_id)
 1683                         fnd = 1;
 1684 
 1685                 if (!fnd) {
 1686                         SCTP_INP_RUNLOCK(inp);
 1687                         continue;
 1688                 }
 1689                 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
 1690                         if (laddr->ifa == NULL) {
 1691                                 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
 1692                                     __FUNCTION__);
 1693                                 continue;
 1694                         }
 1695                         SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ",
 1696                             (void *)laddr->ifa);
 1697                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
 1698                                 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n");
 1699                                 continue;
 1700                         }
 1701                         if (laddr->ifa->address.sa.sa_family == nam->sa_family) {
 1702                                 /* possible, see if it matches */
 1703                                 switch (nam->sa_family) {
 1704 #ifdef INET
 1705                                 case AF_INET:
 1706                                         if (sin->sin_addr.s_addr ==
 1707                                             laddr->ifa->address.sin.sin_addr.s_addr) {
 1708                                                 SCTP_INP_RUNLOCK(inp);
 1709                                                 return (inp);
 1710                                         }
 1711                                         break;
 1712 #endif
 1713 #ifdef INET6
 1714                                 case AF_INET6:
 1715                                         intf_addr6 = &laddr->ifa->address.sin6;
 1716                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
 1717                                             intf_addr6)) {
 1718                                                 SCTP_INP_RUNLOCK(inp);
 1719                                                 return (inp);
 1720                                         }
 1721                                         break;
 1722 #endif
 1723                                 }
 1724                         }
 1725                 }
 1726                 SCTP_INP_RUNLOCK(inp);
 1727         }
 1728         return (NULL);
 1729 }
 1730 
 1731 
 1732 static struct sctp_inpcb *
 1733 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id)
 1734 {
 1735         struct sctppcbhead *head;
 1736         struct sctp_inpcb *t_inp;
 1737         int fnd;
 1738 
 1739         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
 1740             SCTP_BASE_INFO(hashmark))];
 1741         LIST_FOREACH(t_inp, head, sctp_hash) {
 1742                 if (t_inp->sctp_lport != lport) {
 1743                         continue;
 1744                 }
 1745                 /* is it in the VRF in question */
 1746                 fnd = 0;
 1747                 if (t_inp->def_vrf_id == vrf_id)
 1748                         fnd = 1;
 1749                 if (!fnd)
 1750                         continue;
 1751 
 1752                 /* This one is in use. */
 1753                 /* check the v6/v4 binding issue */
 1754                 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
 1755                     SCTP_IPV6_V6ONLY(t_inp)) {
 1756                         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
 1757                                 /* collision in V6 space */
 1758                                 return (t_inp);
 1759                         } else {
 1760                                 /* inp is BOUND_V4 no conflict */
 1761                                 continue;
 1762                         }
 1763                 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
 1764                         /* t_inp is bound v4 and v6, conflict always */
 1765                         return (t_inp);
 1766                 } else {
 1767                         /* t_inp is bound only V4 */
 1768                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
 1769                             SCTP_IPV6_V6ONLY(inp)) {
 1770                                 /* no conflict */
 1771                                 continue;
 1772                         }
 1773                         /* else fall through to conflict */
 1774                 }
 1775                 return (t_inp);
 1776         }
 1777         return (NULL);
 1778 }
 1779 
 1780 
 1781 int
 1782 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp)
 1783 {
 1784         /* For 1-2-1 with port reuse */
 1785         struct sctppcbhead *head;
 1786         struct sctp_inpcb *tinp;
 1787 
 1788         if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) {
 1789                 /* only works with port reuse on */
 1790                 return (-1);
 1791         }
 1792         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) {
 1793                 return (0);
 1794         }
 1795         SCTP_INP_RUNLOCK(inp);
 1796         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport,
 1797             SCTP_BASE_INFO(hashmark))];
 1798         /* Kick out all non-listeners to the TCP hash */
 1799         LIST_FOREACH(tinp, head, sctp_hash) {
 1800                 if (tinp->sctp_lport != inp->sctp_lport) {
 1801                         continue;
 1802                 }
 1803                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
 1804                         continue;
 1805                 }
 1806                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
 1807                         continue;
 1808                 }
 1809                 if (tinp->sctp_socket->so_qlimit) {
 1810                         continue;
 1811                 }
 1812                 SCTP_INP_WLOCK(tinp);
 1813                 LIST_REMOVE(tinp, sctp_hash);
 1814                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))];
 1815                 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
 1816                 LIST_INSERT_HEAD(head, tinp, sctp_hash);
 1817                 SCTP_INP_WUNLOCK(tinp);
 1818         }
 1819         SCTP_INP_WLOCK(inp);
 1820         /* Pull from where he was */
 1821         LIST_REMOVE(inp, sctp_hash);
 1822         inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL;
 1823         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))];
 1824         LIST_INSERT_HEAD(head, inp, sctp_hash);
 1825         SCTP_INP_WUNLOCK(inp);
 1826         SCTP_INP_RLOCK(inp);
 1827         return (0);
 1828 }
 1829 
 1830 
 1831 struct sctp_inpcb *
 1832 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock,
 1833     uint32_t vrf_id)
 1834 {
 1835         /*
 1836          * First we check the hash table to see if someone has this port
 1837          * bound with just the port.
 1838          */
 1839         struct sctp_inpcb *inp;
 1840         struct sctppcbhead *head;
 1841         int lport;
 1842         unsigned int i;
 1843 
 1844 #ifdef INET
 1845         struct sockaddr_in *sin;
 1846 
 1847 #endif
 1848 #ifdef INET6
 1849         struct sockaddr_in6 *sin6;
 1850 
 1851 #endif
 1852 
 1853         switch (nam->sa_family) {
 1854 #ifdef INET
 1855         case AF_INET:
 1856                 sin = (struct sockaddr_in *)nam;
 1857                 lport = sin->sin_port;
 1858                 break;
 1859 #endif
 1860 #ifdef INET6
 1861         case AF_INET6:
 1862                 sin6 = (struct sockaddr_in6 *)nam;
 1863                 lport = sin6->sin6_port;
 1864                 break;
 1865 #endif
 1866         default:
 1867                 return (NULL);
 1868         }
 1869         /*
 1870          * I could cheat here and just cast to one of the types but we will
 1871          * do it right. It also provides the check against an Unsupported
 1872          * type too.
 1873          */
 1874         /* Find the head of the ALLADDR chain */
 1875         if (have_lock == 0) {
 1876                 SCTP_INP_INFO_RLOCK();
 1877         }
 1878         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
 1879             SCTP_BASE_INFO(hashmark))];
 1880         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
 1881 
 1882         /*
 1883          * If the TCP model exists it could be that the main listening
 1884          * endpoint is gone but there still exists a connected socket for
 1885          * this guy. If so we can return the first one that we find. This
 1886          * may NOT be the correct one so the caller should be wary on the
 1887          * returned INP. Currently the only caller that sets find_tcp_pool
 1888          * is in bindx where we are verifying that a user CAN bind the
 1889          * address. He either has bound it already, or someone else has, or
 1890          * its open to bind, so this is good enough.
 1891          */
 1892         if (inp == NULL && find_tcp_pool) {
 1893                 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) {
 1894                         head = &SCTP_BASE_INFO(sctp_tcpephash)[i];
 1895                         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
 1896                         if (inp) {
 1897                                 break;
 1898                         }
 1899                 }
 1900         }
 1901         if (inp) {
 1902                 SCTP_INP_INCR_REF(inp);
 1903         }
 1904         if (have_lock == 0) {
 1905                 SCTP_INP_INFO_RUNLOCK();
 1906         }
 1907         return (inp);
 1908 }
 1909 
 1910 
 1911 /*
 1912  * Find an association for an endpoint with the pointer to whom you want to
 1913  * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may
 1914  * need to change the *to to some other struct like a mbuf...
 1915  */
 1916 struct sctp_tcb *
 1917 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to,
 1918     struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool,
 1919     uint32_t vrf_id)
 1920 {
 1921         struct sctp_inpcb *inp = NULL;
 1922         struct sctp_tcb *stcb;
 1923 
 1924         SCTP_INP_INFO_RLOCK();
 1925         if (find_tcp_pool) {
 1926                 if (inp_p != NULL) {
 1927                         stcb = sctp_tcb_special_locate(inp_p, from, to, netp,
 1928                             vrf_id);
 1929                 } else {
 1930                         stcb = sctp_tcb_special_locate(&inp, from, to, netp,
 1931                             vrf_id);
 1932                 }
 1933                 if (stcb != NULL) {
 1934                         SCTP_INP_INFO_RUNLOCK();
 1935                         return (stcb);
 1936                 }
 1937         }
 1938         inp = sctp_pcb_findep(to, 0, 1, vrf_id);
 1939         if (inp_p != NULL) {
 1940                 *inp_p = inp;
 1941         }
 1942         SCTP_INP_INFO_RUNLOCK();
 1943         if (inp == NULL) {
 1944                 return (NULL);
 1945         }
 1946         /*
 1947          * ok, we have an endpoint, now lets find the assoc for it (if any)
 1948          * we now place the source address or from in the to of the find
 1949          * endpoint call. Since in reality this chain is used from the
 1950          * inbound packet side.
 1951          */
 1952         if (inp_p != NULL) {
 1953                 stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to,
 1954                     NULL);
 1955         } else {
 1956                 stcb = sctp_findassociation_ep_addr(&inp, from, netp, to,
 1957                     NULL);
 1958         }
 1959         return (stcb);
 1960 }
 1961 
 1962 
 1963 /*
 1964  * This routine will grub through the mbuf that is a INIT or INIT-ACK and
 1965  * find all addresses that the sender has specified in any address list. Each
 1966  * address will be used to lookup the TCB and see if one exits.
 1967  */
 1968 static struct sctp_tcb *
 1969 sctp_findassociation_special_addr(struct mbuf *m, int offset,
 1970     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp,
 1971     struct sockaddr *dst)
 1972 {
 1973         struct sctp_paramhdr *phdr, parm_buf;
 1974         struct sctp_tcb *stcb;
 1975         uint32_t ptype, plen;
 1976 
 1977 #ifdef INET
 1978         struct sockaddr_in sin4;
 1979 
 1980 #endif
 1981 #ifdef INET6
 1982         struct sockaddr_in6 sin6;
 1983 
 1984 #endif
 1985 
 1986 #ifdef INET
 1987         memset(&sin4, 0, sizeof(sin4));
 1988         sin4.sin_len = sizeof(sin4);
 1989         sin4.sin_family = AF_INET;
 1990         sin4.sin_port = sh->src_port;
 1991 #endif
 1992 #ifdef INET6
 1993         memset(&sin6, 0, sizeof(sin6));
 1994         sin6.sin6_len = sizeof(sin6);
 1995         sin6.sin6_family = AF_INET6;
 1996         sin6.sin6_port = sh->src_port;
 1997 #endif
 1998 
 1999         stcb = NULL;
 2000         offset += sizeof(struct sctp_init_chunk);
 2001 
 2002         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
 2003         while (phdr != NULL) {
 2004                 /* now we must see if we want the parameter */
 2005                 ptype = ntohs(phdr->param_type);
 2006                 plen = ntohs(phdr->param_length);
 2007                 if (plen == 0) {
 2008                         break;
 2009                 }
 2010 #ifdef INET
 2011                 if (ptype == SCTP_IPV4_ADDRESS &&
 2012                     plen == sizeof(struct sctp_ipv4addr_param)) {
 2013                         /* Get the rest of the address */
 2014                         struct sctp_ipv4addr_param ip4_parm, *p4;
 2015 
 2016                         phdr = sctp_get_next_param(m, offset,
 2017                             (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm)));
 2018                         if (phdr == NULL) {
 2019                                 return (NULL);
 2020                         }
 2021                         p4 = (struct sctp_ipv4addr_param *)phdr;
 2022                         memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr));
 2023                         /* look it up */
 2024                         stcb = sctp_findassociation_ep_addr(inp_p,
 2025                             (struct sockaddr *)&sin4, netp, dst, NULL);
 2026                         if (stcb != NULL) {
 2027                                 return (stcb);
 2028                         }
 2029                 }
 2030 #endif
 2031 #ifdef INET6
 2032                 if (ptype == SCTP_IPV6_ADDRESS &&
 2033                     plen == sizeof(struct sctp_ipv6addr_param)) {
 2034                         /* Get the rest of the address */
 2035                         struct sctp_ipv6addr_param ip6_parm, *p6;
 2036 
 2037                         phdr = sctp_get_next_param(m, offset,
 2038                             (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm)));
 2039                         if (phdr == NULL) {
 2040                                 return (NULL);
 2041                         }
 2042                         p6 = (struct sctp_ipv6addr_param *)phdr;
 2043                         memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr));
 2044                         /* look it up */
 2045                         stcb = sctp_findassociation_ep_addr(inp_p,
 2046                             (struct sockaddr *)&sin6, netp, dst, NULL);
 2047                         if (stcb != NULL) {
 2048                                 return (stcb);
 2049                         }
 2050                 }
 2051 #endif
 2052                 offset += SCTP_SIZE32(plen);
 2053                 phdr = sctp_get_next_param(m, offset, &parm_buf,
 2054                     sizeof(parm_buf));
 2055         }
 2056         return (NULL);
 2057 }
 2058 
 2059 static struct sctp_tcb *
 2060 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag,
 2061     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport,
 2062     uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag)
 2063 {
 2064         /*
 2065          * Use my vtag to hash. If we find it we then verify the source addr
 2066          * is in the assoc. If all goes well we save a bit on rec of a
 2067          * packet.
 2068          */
 2069         struct sctpasochead *head;
 2070         struct sctp_nets *net;
 2071         struct sctp_tcb *stcb;
 2072 
 2073         SCTP_INP_INFO_RLOCK();
 2074         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag,
 2075             SCTP_BASE_INFO(hashasocmark))];
 2076         if (head == NULL) {
 2077                 /* invalid vtag */
 2078                 SCTP_INP_INFO_RUNLOCK();
 2079                 return (NULL);
 2080         }
 2081         LIST_FOREACH(stcb, head, sctp_asocs) {
 2082                 SCTP_INP_RLOCK(stcb->sctp_ep);
 2083                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
 2084                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
 2085                         continue;
 2086                 }
 2087                 if (stcb->sctp_ep->def_vrf_id != vrf_id) {
 2088                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
 2089                         continue;
 2090                 }
 2091                 SCTP_TCB_LOCK(stcb);
 2092                 SCTP_INP_RUNLOCK(stcb->sctp_ep);
 2093                 if (stcb->asoc.my_vtag == vtag) {
 2094                         /* candidate */
 2095                         if (stcb->rport != rport) {
 2096                                 SCTP_TCB_UNLOCK(stcb);
 2097                                 continue;
 2098                         }
 2099                         if (stcb->sctp_ep->sctp_lport != lport) {
 2100                                 SCTP_TCB_UNLOCK(stcb);
 2101                                 continue;
 2102                         }
 2103                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
 2104                                 SCTP_TCB_UNLOCK(stcb);
 2105                                 continue;
 2106                         }
 2107                         /* RRS:Need toaddr check here */
 2108                         if (sctp_does_stcb_own_this_addr(stcb, to) == 0) {
 2109                                 /* Endpoint does not own this address */
 2110                                 SCTP_TCB_UNLOCK(stcb);
 2111                                 continue;
 2112                         }
 2113                         if (remote_tag) {
 2114                                 /*
 2115                                  * If we have both vtags that's all we match
 2116                                  * on
 2117                                  */
 2118                                 if (stcb->asoc.peer_vtag == remote_tag) {
 2119                                         /*
 2120                                          * If both tags match we consider it
 2121                                          * conclusive and check NO
 2122                                          * source/destination addresses
 2123                                          */
 2124                                         goto conclusive;
 2125                                 }
 2126                         }
 2127                         if (skip_src_check) {
 2128                 conclusive:
 2129                                 if (from) {
 2130                                         *netp = sctp_findnet(stcb, from);
 2131                                 } else {
 2132                                         *netp = NULL;   /* unknown */
 2133                                 }
 2134                                 if (inp_p)
 2135                                         *inp_p = stcb->sctp_ep;
 2136                                 SCTP_INP_INFO_RUNLOCK();
 2137                                 return (stcb);
 2138                         }
 2139                         net = sctp_findnet(stcb, from);
 2140                         if (net) {
 2141                                 /* yep its him. */
 2142                                 *netp = net;
 2143                                 SCTP_STAT_INCR(sctps_vtagexpress);
 2144                                 *inp_p = stcb->sctp_ep;
 2145                                 SCTP_INP_INFO_RUNLOCK();
 2146                                 return (stcb);
 2147                         } else {
 2148                                 /*
 2149                                  * not him, this should only happen in rare
 2150                                  * cases so I peg it.
 2151                                  */
 2152                                 SCTP_STAT_INCR(sctps_vtagbogus);
 2153                         }
 2154                 }
 2155                 SCTP_TCB_UNLOCK(stcb);
 2156         }
 2157         SCTP_INP_INFO_RUNLOCK();
 2158         return (NULL);
 2159 }
 2160 
 2161 
 2162 /*
 2163  * Find an association with the pointer to the inbound IP packet. This can be
 2164  * a IPv4 or IPv6 packet.
 2165  */
 2166 struct sctp_tcb *
 2167 sctp_findassociation_addr(struct mbuf *m, int offset,
 2168     struct sockaddr *src, struct sockaddr *dst,
 2169     struct sctphdr *sh, struct sctp_chunkhdr *ch,
 2170     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
 2171 {
 2172         int find_tcp_pool;
 2173         struct sctp_tcb *stcb;
 2174         struct sctp_inpcb *inp;
 2175 
 2176         if (sh->v_tag) {
 2177                 /* we only go down this path if vtag is non-zero */
 2178                 stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag),
 2179                     inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0);
 2180                 if (stcb) {
 2181                         return (stcb);
 2182                 }
 2183         }
 2184         find_tcp_pool = 0;
 2185         if ((ch->chunk_type != SCTP_INITIATION) &&
 2186             (ch->chunk_type != SCTP_INITIATION_ACK) &&
 2187             (ch->chunk_type != SCTP_COOKIE_ACK) &&
 2188             (ch->chunk_type != SCTP_COOKIE_ECHO)) {
 2189                 /* Other chunk types go to the tcp pool. */
 2190                 find_tcp_pool = 1;
 2191         }
 2192         if (inp_p) {
 2193                 stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp,
 2194                     find_tcp_pool, vrf_id);
 2195                 inp = *inp_p;
 2196         } else {
 2197                 stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp,
 2198                     find_tcp_pool, vrf_id);
 2199         }
 2200         SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp);
 2201         if (stcb == NULL && inp) {
 2202                 /* Found a EP but not this address */
 2203                 if ((ch->chunk_type == SCTP_INITIATION) ||
 2204                     (ch->chunk_type == SCTP_INITIATION_ACK)) {
 2205                         /*-
 2206                          * special hook, we do NOT return linp or an
 2207                          * association that is linked to an existing
 2208                          * association that is under the TCP pool (i.e. no
 2209                          * listener exists). The endpoint finding routine
 2210                          * will always find a listener before examining the
 2211                          * TCP pool.
 2212                          */
 2213                         if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
 2214                                 if (inp_p) {
 2215                                         *inp_p = NULL;
 2216                                 }
 2217                                 return (NULL);
 2218                         }
 2219                         stcb = sctp_findassociation_special_addr(m,
 2220                             offset, sh, &inp, netp, dst);
 2221                         if (inp_p != NULL) {
 2222                                 *inp_p = inp;
 2223                         }
 2224                 }
 2225         }
 2226         SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb);
 2227         return (stcb);
 2228 }
 2229 
 2230 /*
 2231  * lookup an association by an ASCONF lookup address.
 2232  * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup
 2233  */
 2234 struct sctp_tcb *
 2235 sctp_findassociation_ep_asconf(struct mbuf *m, int offset,
 2236     struct sockaddr *dst, struct sctphdr *sh,
 2237     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
 2238 {
 2239         struct sctp_tcb *stcb;
 2240         struct sockaddr_storage remote_store;
 2241         struct sctp_paramhdr parm_buf, *phdr;
 2242         int ptype;
 2243         int zero_address = 0;
 2244 
 2245 #ifdef INET
 2246         struct sockaddr_in *sin;
 2247 
 2248 #endif
 2249 #ifdef INET6
 2250         struct sockaddr_in6 *sin6;
 2251 
 2252 #endif
 2253 
 2254         memset(&remote_store, 0, sizeof(remote_store));
 2255         phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk),
 2256             &parm_buf, sizeof(struct sctp_paramhdr));
 2257         if (phdr == NULL) {
 2258                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n",
 2259                     __FUNCTION__);
 2260                 return NULL;
 2261         }
 2262         ptype = (int)((uint32_t) ntohs(phdr->param_type));
 2263         /* get the correlation address */
 2264         switch (ptype) {
 2265 #ifdef INET6
 2266         case SCTP_IPV6_ADDRESS:
 2267                 {
 2268                         /* ipv6 address param */
 2269                         struct sctp_ipv6addr_param *p6, p6_buf;
 2270 
 2271                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) {
 2272                                 return NULL;
 2273                         }
 2274                         p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m,
 2275                             offset + sizeof(struct sctp_asconf_chunk),
 2276                             &p6_buf.ph, sizeof(*p6));
 2277                         if (p6 == NULL) {
 2278                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n",
 2279                                     __FUNCTION__);
 2280                                 return (NULL);
 2281                         }
 2282                         sin6 = (struct sockaddr_in6 *)&remote_store;
 2283                         sin6->sin6_family = AF_INET6;
 2284                         sin6->sin6_len = sizeof(*sin6);
 2285                         sin6->sin6_port = sh->src_port;
 2286                         memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr));
 2287                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
 2288                                 zero_address = 1;
 2289                         break;
 2290                 }
 2291 #endif
 2292 #ifdef INET
 2293         case SCTP_IPV4_ADDRESS:
 2294                 {
 2295                         /* ipv4 address param */
 2296                         struct sctp_ipv4addr_param *p4, p4_buf;
 2297 
 2298                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) {
 2299                                 return NULL;
 2300                         }
 2301                         p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m,
 2302                             offset + sizeof(struct sctp_asconf_chunk),
 2303                             &p4_buf.ph, sizeof(*p4));
 2304                         if (p4 == NULL) {
 2305                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n",
 2306                                     __FUNCTION__);
 2307                                 return (NULL);
 2308                         }
 2309                         sin = (struct sockaddr_in *)&remote_store;
 2310                         sin->sin_family = AF_INET;
 2311                         sin->sin_len = sizeof(*sin);
 2312                         sin->sin_port = sh->src_port;
 2313                         memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr));
 2314                         if (sin->sin_addr.s_addr == INADDR_ANY)
 2315                                 zero_address = 1;
 2316                         break;
 2317                 }
 2318 #endif
 2319         default:
 2320                 /* invalid address param type */
 2321                 return NULL;
 2322         }
 2323 
 2324         if (zero_address) {
 2325                 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p,
 2326                     netp, sh->src_port, sh->dest_port, 1, vrf_id, 0);
 2327                 if (stcb != NULL) {
 2328                         SCTP_INP_DECR_REF(*inp_p);
 2329                 }
 2330         } else {
 2331                 stcb = sctp_findassociation_ep_addr(inp_p,
 2332                     (struct sockaddr *)&remote_store, netp,
 2333                     dst, NULL);
 2334         }
 2335         return (stcb);
 2336 }
 2337 
 2338 
 2339 /*
 2340  * allocate a sctp_inpcb and setup a temporary binding to a port/all
 2341  * addresses. This way if we don't get a bind we by default pick a ephemeral
 2342  * port with all addresses bound.
 2343  */
 2344 int
 2345 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id)
 2346 {
 2347         /*
 2348          * we get called when a new endpoint starts up. We need to allocate
 2349          * the sctp_inpcb structure from the zone and init it. Mark it as
 2350          * unbound and find a port that we can use as an ephemeral with
 2351          * INADDR_ANY. If the user binds later no problem we can then add in
 2352          * the specific addresses. And setup the default parameters for the
 2353          * EP.
 2354          */
 2355         int i, error;
 2356         struct sctp_inpcb *inp;
 2357         struct sctp_pcb *m;
 2358         struct timeval time;
 2359         sctp_sharedkey_t *null_key;
 2360 
 2361         error = 0;
 2362 
 2363         SCTP_INP_INFO_WLOCK();
 2364         inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb);
 2365         if (inp == NULL) {
 2366                 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n");
 2367                 SCTP_INP_INFO_WUNLOCK();
 2368                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
 2369                 return (ENOBUFS);
 2370         }
 2371         /* zap it */
 2372         bzero(inp, sizeof(*inp));
 2373 
 2374         /* bump generations */
 2375         /* setup socket pointers */
 2376         inp->sctp_socket = so;
 2377         inp->ip_inp.inp.inp_socket = so;
 2378 #ifdef INET6
 2379         if (MODULE_GLOBAL(ip6_auto_flowlabel)) {
 2380                 inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL;
 2381         }
 2382 #endif
 2383         inp->sctp_associd_counter = 1;
 2384         inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT;
 2385         inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT;
 2386         inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off);
 2387         inp->sctp_ecn_enable = SCTP_BASE_SYSCTL(sctp_ecn_enable);
 2388         /* init the small hash table we use to track asocid <-> tcb */
 2389         inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark);
 2390         if (inp->sctp_asocidhash == NULL) {
 2391                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
 2392                 SCTP_INP_INFO_WUNLOCK();
 2393                 return (ENOBUFS);
 2394         }
 2395 #ifdef IPSEC
 2396         {
 2397                 struct inpcbpolicy *pcb_sp = NULL;
 2398 
 2399                 error = ipsec_init_policy(so, &pcb_sp);
 2400                 /* Arrange to share the policy */
 2401                 inp->ip_inp.inp.inp_sp = pcb_sp;
 2402                 ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp;
 2403         }
 2404         if (error != 0) {
 2405                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
 2406                 SCTP_INP_INFO_WUNLOCK();
 2407                 return error;
 2408         }
 2409 #endif                          /* IPSEC */
 2410         SCTP_INCR_EP_COUNT();
 2411         inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl);
 2412         SCTP_INP_INFO_WUNLOCK();
 2413 
 2414         so->so_pcb = (caddr_t)inp;
 2415 
 2416         if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) {
 2417                 /* UDP style socket */
 2418                 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
 2419                     SCTP_PCB_FLAGS_UNBOUND);
 2420                 /* Be sure it is NON-BLOCKING IO for UDP */
 2421                 /* SCTP_SET_SO_NBIO(so); */
 2422         } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) {
 2423                 /* TCP style socket */
 2424                 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
 2425                     SCTP_PCB_FLAGS_UNBOUND);
 2426                 /* Be sure we have blocking IO by default */
 2427                 SCTP_CLEAR_SO_NBIO(so);
 2428         } else {
 2429                 /*
 2430                  * unsupported socket type (RAW, etc)- in case we missed it
 2431                  * in protosw
 2432                  */
 2433                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP);
 2434                 so->so_pcb = NULL;
 2435                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
 2436                 return (EOPNOTSUPP);
 2437         }
 2438         if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) {
 2439                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
 2440                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
 2441         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) {
 2442                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
 2443                 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
 2444         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) {
 2445                 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
 2446                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
 2447         }
 2448         inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize),
 2449             &inp->sctp_hashmark);
 2450         if (inp->sctp_tcbhash == NULL) {
 2451                 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n");
 2452                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
 2453                 so->so_pcb = NULL;
 2454                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
 2455                 return (ENOBUFS);
 2456         }
 2457         inp->def_vrf_id = vrf_id;
 2458 
 2459         SCTP_INP_INFO_WLOCK();
 2460         SCTP_INP_LOCK_INIT(inp);
 2461         INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp");
 2462         SCTP_INP_READ_INIT(inp);
 2463         SCTP_ASOC_CREATE_LOCK_INIT(inp);
 2464         /* lock the new ep */
 2465         SCTP_INP_WLOCK(inp);
 2466 
 2467         /* add it to the info area */
 2468         LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list);
 2469         SCTP_INP_INFO_WUNLOCK();
 2470 
 2471         TAILQ_INIT(&inp->read_queue);
 2472         LIST_INIT(&inp->sctp_addr_list);
 2473 
 2474         LIST_INIT(&inp->sctp_asoc_list);
 2475 
 2476 #ifdef SCTP_TRACK_FREED_ASOCS
 2477         /* TEMP CODE */
 2478         LIST_INIT(&inp->sctp_asoc_free_list);
 2479 #endif
 2480         /* Init the timer structure for signature change */
 2481         SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer);
 2482         inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE;
 2483 
 2484         /* now init the actual endpoint default data */
 2485         m = &inp->sctp_ep;
 2486 
 2487         /* setup the base timeout information */
 2488         m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC);    /* needed ? */
 2489         m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC);    /* needed ? */
 2490         m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default));
 2491         m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default));
 2492         m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default));
 2493         m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default));
 2494         m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default));
 2495         /* all max/min max are in ms */
 2496         m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default);
 2497         m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default);
 2498         m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default);
 2499         m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default);
 2500         m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default);
 2501 
 2502         m->max_open_streams_intome = MAX_SCTP_STREAMS;
 2503 
 2504         m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default);
 2505         m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default);
 2506         m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default);
 2507         m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold);
 2508         m->sctp_sws_sender = SCTP_SWS_SENDER_DEF;
 2509         m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF;
 2510         m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default);
 2511         m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default);
 2512 
 2513         m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module);
 2514         m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module);
 2515         /* number of streams to pre-open on a association */
 2516         m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default);
 2517 
 2518         /* Add adaptation cookie */
 2519         m->adaptation_layer_indicator = 0;
 2520         m->adaptation_layer_indicator_provided = 0;
 2521 
 2522         /* seed random number generator */
 2523         m->random_counter = 1;
 2524         m->store_at = SCTP_SIGNATURE_SIZE;
 2525         SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers));
 2526         sctp_fill_random_store(m);
 2527 
 2528         /* Minimum cookie size */
 2529         m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) +
 2530             sizeof(struct sctp_state_cookie);
 2531         m->size_of_a_cookie += SCTP_SIGNATURE_SIZE;
 2532 
 2533         /* Setup the initial secret */
 2534         (void)SCTP_GETTIME_TIMEVAL(&time);
 2535         m->time_of_secret_change = time.tv_sec;
 2536 
 2537         for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
 2538                 m->secret_key[0][i] = sctp_select_initial_TSN(m);
 2539         }
 2540         sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
 2541 
 2542         /* How long is a cookie good for ? */
 2543         m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default));
 2544         /*
 2545          * Initialize authentication parameters
 2546          */
 2547         m->local_hmacs = sctp_default_supported_hmaclist();
 2548         m->local_auth_chunks = sctp_alloc_chunklist();
 2549         m->default_dscp = 0;
 2550 #ifdef INET6
 2551         m->default_flowlabel = 0;
 2552 #endif
 2553         m->port = 0;            /* encapsulation disabled by default */
 2554         sctp_auth_set_default_chunks(m->local_auth_chunks);
 2555         LIST_INIT(&m->shared_keys);
 2556         /* add default NULL key as key id 0 */
 2557         null_key = sctp_alloc_sharedkey();
 2558         sctp_insert_sharedkey(&m->shared_keys, null_key);
 2559         SCTP_INP_WUNLOCK(inp);
 2560 #ifdef SCTP_LOG_CLOSING
 2561         sctp_log_closing(inp, NULL, 12);
 2562 #endif
 2563         return (error);
 2564 }
 2565 
 2566 
 2567 void
 2568 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp,
 2569     struct sctp_tcb *stcb)
 2570 {
 2571         struct sctp_nets *net;
 2572         uint16_t lport, rport;
 2573         struct sctppcbhead *head;
 2574         struct sctp_laddr *laddr, *oladdr;
 2575 
 2576         atomic_add_int(&stcb->asoc.refcnt, 1);
 2577         SCTP_TCB_UNLOCK(stcb);
 2578         SCTP_INP_INFO_WLOCK();
 2579         SCTP_INP_WLOCK(old_inp);
 2580         SCTP_INP_WLOCK(new_inp);
 2581         SCTP_TCB_LOCK(stcb);
 2582         atomic_subtract_int(&stcb->asoc.refcnt, 1);
 2583 
 2584         new_inp->sctp_ep.time_of_secret_change =
 2585             old_inp->sctp_ep.time_of_secret_change;
 2586         memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key,
 2587             sizeof(old_inp->sctp_ep.secret_key));
 2588         new_inp->sctp_ep.current_secret_number =
 2589             old_inp->sctp_ep.current_secret_number;
 2590         new_inp->sctp_ep.last_secret_number =
 2591             old_inp->sctp_ep.last_secret_number;
 2592         new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie;
 2593 
 2594         /* make it so new data pours into the new socket */
 2595         stcb->sctp_socket = new_inp->sctp_socket;
 2596         stcb->sctp_ep = new_inp;
 2597 
 2598         /* Copy the port across */
 2599         lport = new_inp->sctp_lport = old_inp->sctp_lport;
 2600         rport = stcb->rport;
 2601         /* Pull the tcb from the old association */
 2602         LIST_REMOVE(stcb, sctp_tcbhash);
 2603         LIST_REMOVE(stcb, sctp_tcblist);
 2604         if (stcb->asoc.in_asocid_hash) {
 2605                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
 2606         }
 2607         /* Now insert the new_inp into the TCP connected hash */
 2608         head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
 2609 
 2610         LIST_INSERT_HEAD(head, new_inp, sctp_hash);
 2611         /* Its safe to access */
 2612         new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
 2613 
 2614         /* Now move the tcb into the endpoint list */
 2615         LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist);
 2616         /*
 2617          * Question, do we even need to worry about the ep-hash since we
 2618          * only have one connection? Probably not :> so lets get rid of it
 2619          * and not suck up any kernel memory in that.
 2620          */
 2621         if (stcb->asoc.in_asocid_hash) {
 2622                 struct sctpasochead *lhd;
 2623 
 2624                 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id,
 2625                     new_inp->hashasocidmark)];
 2626                 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash);
 2627         }
 2628         /* Ok. Let's restart timer. */
 2629         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 2630                 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp,
 2631                     stcb, net);
 2632         }
 2633 
 2634         SCTP_INP_INFO_WUNLOCK();
 2635         if (new_inp->sctp_tcbhash != NULL) {
 2636                 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark);
 2637                 new_inp->sctp_tcbhash = NULL;
 2638         }
 2639         if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
 2640                 /* Subset bound, so copy in the laddr list from the old_inp */
 2641                 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) {
 2642                         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
 2643                         if (laddr == NULL) {
 2644                                 /*
 2645                                  * Gak, what can we do? This assoc is really
 2646                                  * HOSED. We probably should send an abort
 2647                                  * here.
 2648                                  */
 2649                                 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n");
 2650                                 continue;
 2651                         }
 2652                         SCTP_INCR_LADDR_COUNT();
 2653                         bzero(laddr, sizeof(*laddr));
 2654                         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
 2655                         laddr->ifa = oladdr->ifa;
 2656                         atomic_add_int(&laddr->ifa->refcount, 1);
 2657                         LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr,
 2658                             sctp_nxt_addr);
 2659                         new_inp->laddr_count++;
 2660                         if (oladdr == stcb->asoc.last_used_address) {
 2661                                 stcb->asoc.last_used_address = laddr;
 2662                         }
 2663                 }
 2664         }
 2665         /*
 2666          * Now any running timers need to be adjusted since we really don't
 2667          * care if they are running or not just blast in the new_inp into
 2668          * all of them.
 2669          */
 2670 
 2671         stcb->asoc.dack_timer.ep = (void *)new_inp;
 2672         stcb->asoc.asconf_timer.ep = (void *)new_inp;
 2673         stcb->asoc.strreset_timer.ep = (void *)new_inp;
 2674         stcb->asoc.shut_guard_timer.ep = (void *)new_inp;
 2675         stcb->asoc.autoclose_timer.ep = (void *)new_inp;
 2676         stcb->asoc.delayed_event_timer.ep = (void *)new_inp;
 2677         stcb->asoc.delete_prim_timer.ep = (void *)new_inp;
 2678         /* now what about the nets? */
 2679         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 2680                 net->pmtu_timer.ep = (void *)new_inp;
 2681                 net->hb_timer.ep = (void *)new_inp;
 2682                 net->rxt_timer.ep = (void *)new_inp;
 2683         }
 2684         SCTP_INP_WUNLOCK(new_inp);
 2685         SCTP_INP_WUNLOCK(old_inp);
 2686 }
 2687 
 2688 
 2689 
 2690 
 2691 /* sctp_ifap is used to bypass normal local address validation checks */
 2692 int
 2693 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr,
 2694     struct sctp_ifa *sctp_ifap, struct thread *p)
 2695 {
 2696         /* bind a ep to a socket address */
 2697         struct sctppcbhead *head;
 2698         struct sctp_inpcb *inp, *inp_tmp;
 2699         struct inpcb *ip_inp;
 2700         int port_reuse_active = 0;
 2701         int bindall;
 2702         uint16_t lport;
 2703         int error;
 2704         uint32_t vrf_id;
 2705 
 2706         lport = 0;
 2707         error = 0;
 2708         bindall = 1;
 2709         inp = (struct sctp_inpcb *)so->so_pcb;
 2710         ip_inp = (struct inpcb *)so->so_pcb;
 2711 #ifdef SCTP_DEBUG
 2712         if (addr) {
 2713                 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n",
 2714                     ntohs(((struct sockaddr_in *)addr)->sin_port));
 2715                 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: ");
 2716                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
 2717         }
 2718 #endif
 2719         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
 2720                 /* already did a bind, subsequent binds NOT allowed ! */
 2721                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
 2722                 return (EINVAL);
 2723         }
 2724 #ifdef INVARIANTS
 2725         if (p == NULL)
 2726                 panic("null proc/thread");
 2727 #endif
 2728         if (addr != NULL) {
 2729                 switch (addr->sa_family) {
 2730 #ifdef INET
 2731                 case AF_INET:
 2732                         {
 2733                                 struct sockaddr_in *sin;
 2734 
 2735                                 /* IPV6_V6ONLY socket? */
 2736                                 if (SCTP_IPV6_V6ONLY(ip_inp)) {
 2737                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
 2738                                         return (EINVAL);
 2739                                 }
 2740                                 if (addr->sa_len != sizeof(*sin)) {
 2741                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
 2742                                         return (EINVAL);
 2743                                 }
 2744                                 sin = (struct sockaddr_in *)addr;
 2745                                 lport = sin->sin_port;
 2746                                 /*
 2747                                  * For LOOPBACK the prison_local_ip4() call
 2748                                  * will transmute the ip address to the
 2749                                  * proper value.
 2750                                  */
 2751                                 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) {
 2752                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
 2753                                         return (error);
 2754                                 }
 2755                                 if (sin->sin_addr.s_addr != INADDR_ANY) {
 2756                                         bindall = 0;
 2757                                 }
 2758                                 break;
 2759                         }
 2760 #endif
 2761 #ifdef INET6
 2762                 case AF_INET6:
 2763                         {
 2764                                 /*
 2765                                  * Only for pure IPv6 Address. (No IPv4
 2766                                  * Mapped!)
 2767                                  */
 2768                                 struct sockaddr_in6 *sin6;
 2769 
 2770                                 sin6 = (struct sockaddr_in6 *)addr;
 2771 
 2772                                 if (addr->sa_len != sizeof(*sin6)) {
 2773                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
 2774                                         return (EINVAL);
 2775                                 }
 2776                                 lport = sin6->sin6_port;
 2777                                 /*
 2778                                  * For LOOPBACK the prison_local_ip6() call
 2779                                  * will transmute the ipv6 address to the
 2780                                  * proper value.
 2781                                  */
 2782                                 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr,
 2783                                     (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) {
 2784                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
 2785                                         return (error);
 2786                                 }
 2787                                 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
 2788                                         bindall = 0;
 2789                                         /* KAME hack: embed scopeid */
 2790                                         if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
 2791                                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
 2792                                                 return (EINVAL);
 2793                                         }
 2794                                 }
 2795                                 /* this must be cleared for ifa_ifwithaddr() */
 2796                                 sin6->sin6_scope_id = 0;
 2797                                 break;
 2798                         }
 2799 #endif
 2800                 default:
 2801                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT);
 2802                         return (EAFNOSUPPORT);
 2803                 }
 2804         }
 2805         SCTP_INP_INFO_WLOCK();
 2806         SCTP_INP_WLOCK(inp);
 2807         /* Setup a vrf_id to be the default for the non-bind-all case. */
 2808         vrf_id = inp->def_vrf_id;
 2809 
 2810         /* increase our count due to the unlock we do */
 2811         SCTP_INP_INCR_REF(inp);
 2812         if (lport) {
 2813                 /*
 2814                  * Did the caller specify a port? if so we must see if an ep
 2815                  * already has this one bound.
 2816                  */
 2817                 /* got to be root to get at low ports */
 2818                 if (ntohs(lport) < IPPORT_RESERVED) {
 2819                         if (p && (error =
 2820                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
 2821                             )) {
 2822                                 SCTP_INP_DECR_REF(inp);
 2823                                 SCTP_INP_WUNLOCK(inp);
 2824                                 SCTP_INP_INFO_WUNLOCK();
 2825                                 return (error);
 2826                         }
 2827                 }
 2828                 if (p == NULL) {
 2829                         SCTP_INP_DECR_REF(inp);
 2830                         SCTP_INP_WUNLOCK(inp);
 2831                         SCTP_INP_INFO_WUNLOCK();
 2832                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
 2833                         return (error);
 2834                 }
 2835                 SCTP_INP_WUNLOCK(inp);
 2836                 if (bindall) {
 2837                         vrf_id = inp->def_vrf_id;
 2838                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
 2839                         if (inp_tmp != NULL) {
 2840                                 /*
 2841                                  * lock guy returned and lower count note
 2842                                  * that we are not bound so inp_tmp should
 2843                                  * NEVER be inp. And it is this inp
 2844                                  * (inp_tmp) that gets the reference bump,
 2845                                  * so we must lower it.
 2846                                  */
 2847                                 SCTP_INP_DECR_REF(inp_tmp);
 2848                                 /* unlock info */
 2849                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
 2850                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
 2851                                         /*
 2852                                          * Ok, must be one-2-one and
 2853                                          * allowing port re-use
 2854                                          */
 2855                                         port_reuse_active = 1;
 2856                                         goto continue_anyway;
 2857                                 }
 2858                                 SCTP_INP_DECR_REF(inp);
 2859                                 SCTP_INP_INFO_WUNLOCK();
 2860                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
 2861                                 return (EADDRINUSE);
 2862                         }
 2863                 } else {
 2864                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
 2865                         if (inp_tmp != NULL) {
 2866                                 /*
 2867                                  * lock guy returned and lower count note
 2868                                  * that we are not bound so inp_tmp should
 2869                                  * NEVER be inp. And it is this inp
 2870                                  * (inp_tmp) that gets the reference bump,
 2871                                  * so we must lower it.
 2872                                  */
 2873                                 SCTP_INP_DECR_REF(inp_tmp);
 2874                                 /* unlock info */
 2875                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
 2876                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
 2877                                         /*
 2878                                          * Ok, must be one-2-one and
 2879                                          * allowing port re-use
 2880                                          */
 2881                                         port_reuse_active = 1;
 2882                                         goto continue_anyway;
 2883                                 }
 2884                                 SCTP_INP_DECR_REF(inp);
 2885                                 SCTP_INP_INFO_WUNLOCK();
 2886                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
 2887                                 return (EADDRINUSE);
 2888                         }
 2889                 }
 2890 continue_anyway:
 2891                 SCTP_INP_WLOCK(inp);
 2892                 if (bindall) {
 2893                         /* verify that no lport is not used by a singleton */
 2894                         if ((port_reuse_active == 0) &&
 2895                             (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) {
 2896                                 /* Sorry someone already has this one bound */
 2897                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
 2898                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
 2899                                         port_reuse_active = 1;
 2900                                 } else {
 2901                                         SCTP_INP_DECR_REF(inp);
 2902                                         SCTP_INP_WUNLOCK(inp);
 2903                                         SCTP_INP_INFO_WUNLOCK();
 2904                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
 2905                                         return (EADDRINUSE);
 2906                                 }
 2907                         }
 2908                 }
 2909         } else {
 2910                 uint16_t first, last, candidate;
 2911                 uint16_t count;
 2912                 int done;
 2913 
 2914                 if (ip_inp->inp_flags & INP_HIGHPORT) {
 2915                         first = MODULE_GLOBAL(ipport_hifirstauto);
 2916                         last = MODULE_GLOBAL(ipport_hilastauto);
 2917                 } else if (ip_inp->inp_flags & INP_LOWPORT) {
 2918                         if (p && (error =
 2919                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
 2920                             )) {
 2921                                 SCTP_INP_DECR_REF(inp);
 2922                                 SCTP_INP_WUNLOCK(inp);
 2923                                 SCTP_INP_INFO_WUNLOCK();
 2924                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
 2925                                 return (error);
 2926                         }
 2927                         first = MODULE_GLOBAL(ipport_lowfirstauto);
 2928                         last = MODULE_GLOBAL(ipport_lowlastauto);
 2929                 } else {
 2930                         first = MODULE_GLOBAL(ipport_firstauto);
 2931                         last = MODULE_GLOBAL(ipport_lastauto);
 2932                 }
 2933                 if (first > last) {
 2934                         uint16_t temp;
 2935 
 2936                         temp = first;
 2937                         first = last;
 2938                         last = temp;
 2939                 }
 2940                 count = last - first + 1;       /* number of candidates */
 2941                 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count);
 2942 
 2943                 done = 0;
 2944                 while (!done) {
 2945                         if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) {
 2946                                 done = 1;
 2947                         }
 2948                         if (!done) {
 2949                                 if (--count == 0) {
 2950                                         SCTP_INP_DECR_REF(inp);
 2951                                         SCTP_INP_WUNLOCK(inp);
 2952                                         SCTP_INP_INFO_WUNLOCK();
 2953                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
 2954                                         return (EADDRINUSE);
 2955                                 }
 2956                                 if (candidate == last)
 2957                                         candidate = first;
 2958                                 else
 2959                                         candidate = candidate + 1;
 2960                         }
 2961                 }
 2962                 lport = htons(candidate);
 2963         }
 2964         SCTP_INP_DECR_REF(inp);
 2965         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
 2966             SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
 2967                 /*
 2968                  * this really should not happen. The guy did a non-blocking
 2969                  * bind and then did a close at the same time.
 2970                  */
 2971                 SCTP_INP_WUNLOCK(inp);
 2972                 SCTP_INP_INFO_WUNLOCK();
 2973                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
 2974                 return (EINVAL);
 2975         }
 2976         /* ok we look clear to give out this port, so lets setup the binding */
 2977         if (bindall) {
 2978                 /* binding to all addresses, so just set in the proper flags */
 2979                 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL;
 2980                 /* set the automatic addr changes from kernel flag */
 2981                 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) {
 2982                         sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF);
 2983                         sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
 2984                 } else {
 2985                         sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
 2986                         sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
 2987                 }
 2988                 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) {
 2989                         sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
 2990                 } else {
 2991                         sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
 2992                 }
 2993                 /*
 2994                  * set the automatic mobility_base from kernel flag (by
 2995                  * micchie)
 2996                  */
 2997                 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) {
 2998                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE);
 2999                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
 3000                 } else {
 3001                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE);
 3002                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
 3003                 }
 3004                 /*
 3005                  * set the automatic mobility_fasthandoff from kernel flag
 3006                  * (by micchie)
 3007                  */
 3008                 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) {
 3009                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF);
 3010                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
 3011                 } else {
 3012                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF);
 3013                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
 3014                 }
 3015         } else {
 3016                 /*
 3017                  * bind specific, make sure flags is off and add a new
 3018                  * address structure to the sctp_addr_list inside the ep
 3019                  * structure.
 3020                  * 
 3021                  * We will need to allocate one and insert it at the head. The
 3022                  * socketopt call can just insert new addresses in there as
 3023                  * well. It will also have to do the embed scope kame hack
 3024                  * too (before adding).
 3025                  */
 3026                 struct sctp_ifa *ifa;
 3027                 struct sockaddr_storage store_sa;
 3028 
 3029                 memset(&store_sa, 0, sizeof(store_sa));
 3030                 switch (addr->sa_family) {
 3031 #ifdef INET
 3032                 case AF_INET:
 3033                         {
 3034                                 struct sockaddr_in *sin;
 3035 
 3036                                 sin = (struct sockaddr_in *)&store_sa;
 3037                                 memcpy(sin, addr, sizeof(struct sockaddr_in));
 3038                                 sin->sin_port = 0;
 3039                                 break;
 3040                         }
 3041 #endif
 3042 #ifdef INET6
 3043                 case AF_INET6:
 3044                         {
 3045                                 struct sockaddr_in6 *sin6;
 3046 
 3047                                 sin6 = (struct sockaddr_in6 *)&store_sa;
 3048                                 memcpy(sin6, addr, sizeof(struct sockaddr_in6));
 3049                                 sin6->sin6_port = 0;
 3050                                 break;
 3051                         }
 3052 #endif
 3053                 default:
 3054                         break;
 3055                 }
 3056                 /*
 3057                  * first find the interface with the bound address need to
 3058                  * zero out the port to find the address! yuck! can't do
 3059                  * this earlier since need port for sctp_pcb_findep()
 3060                  */
 3061                 if (sctp_ifap != NULL) {
 3062                         ifa = sctp_ifap;
 3063                 } else {
 3064                         /*
 3065                          * Note for BSD we hit here always other O/S's will
 3066                          * pass things in via the sctp_ifap argument
 3067                          * (Panda).
 3068                          */
 3069                         ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa,
 3070                             vrf_id, SCTP_ADDR_NOT_LOCKED);
 3071                 }
 3072                 if (ifa == NULL) {
 3073                         /* Can't find an interface with that address */
 3074                         SCTP_INP_WUNLOCK(inp);
 3075                         SCTP_INP_INFO_WUNLOCK();
 3076                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL);
 3077                         return (EADDRNOTAVAIL);
 3078                 }
 3079 #ifdef INET6
 3080                 if (addr->sa_family == AF_INET6) {
 3081                         /* GAK, more FIXME IFA lock? */
 3082                         if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
 3083                                 /* Can't bind a non-existent addr. */
 3084                                 SCTP_INP_WUNLOCK(inp);
 3085                                 SCTP_INP_INFO_WUNLOCK();
 3086                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
 3087                                 return (EINVAL);
 3088                         }
 3089                 }
 3090 #endif
 3091                 /* we're not bound all */
 3092                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
 3093                 /* allow bindx() to send ASCONF's for binding changes */
 3094                 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
 3095                 /* clear automatic addr changes from kernel flag */
 3096                 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
 3097 
 3098                 /* add this address to the endpoint list */
 3099                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0);
 3100                 if (error != 0) {
 3101                         SCTP_INP_WUNLOCK(inp);
 3102                         SCTP_INP_INFO_WUNLOCK();
 3103                         return (error);
 3104                 }
 3105                 inp->laddr_count++;
 3106         }
 3107         /* find the bucket */
 3108         if (port_reuse_active) {
 3109                 /* Put it into tcp 1-2-1 hash */
 3110                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))];
 3111                 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
 3112         } else {
 3113                 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))];
 3114         }
 3115         /* put it in the bucket */
 3116         LIST_INSERT_HEAD(head, inp, sctp_hash);
 3117         SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n",
 3118             (void *)head, ntohs(lport), port_reuse_active);
 3119         /* set in the port */
 3120         inp->sctp_lport = lport;
 3121 
 3122         /* turn off just the unbound flag */
 3123         inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
 3124         SCTP_INP_WUNLOCK(inp);
 3125         SCTP_INP_INFO_WUNLOCK();
 3126         return (0);
 3127 }
 3128 
 3129 
 3130 static void
 3131 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp)
 3132 {
 3133         struct sctp_iterator *it, *nit;
 3134 
 3135         /*
 3136          * We enter with the only the ITERATOR_LOCK in place and a write
 3137          * lock on the inp_info stuff.
 3138          */
 3139         it = sctp_it_ctl.cur_it;
 3140         if (it && (it->vn != curvnet)) {
 3141                 /* Its not looking at our VNET */
 3142                 return;
 3143         }
 3144         if (it && (it->inp == inp)) {
 3145                 /*
 3146                  * This is tricky and we hold the iterator lock, but when it
 3147                  * returns and gets the lock (when we release it) the
 3148                  * iterator will try to operate on inp. We need to stop that
 3149                  * from happening. But of course the iterator has a
 3150                  * reference on the stcb and inp. We can mark it and it will
 3151                  * stop.
 3152                  * 
 3153                  * If its a single iterator situation, we set the end iterator
 3154                  * flag. Otherwise we set the iterator to go to the next
 3155                  * inp.
 3156                  * 
 3157                  */
 3158                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
 3159                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
 3160                 } else {
 3161                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP;
 3162                 }
 3163         }
 3164         /*
 3165          * Now go through and remove any single reference to our inp that
 3166          * may be still pending on the list
 3167          */
 3168         SCTP_IPI_ITERATOR_WQ_LOCK();
 3169         TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
 3170                 if (it->vn != curvnet) {
 3171                         continue;
 3172                 }
 3173                 if (it->inp == inp) {
 3174                         /* This one points to me is it inp specific? */
 3175                         if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
 3176                                 /* Remove and free this one */
 3177                                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead,
 3178                                     it, sctp_nxt_itr);
 3179                                 if (it->function_atend != NULL) {
 3180                                         (*it->function_atend) (it->pointer, it->val);
 3181                                 }
 3182                                 SCTP_FREE(it, SCTP_M_ITER);
 3183                         } else {
 3184                                 it->inp = LIST_NEXT(it->inp, sctp_list);
 3185                                 if (it->inp) {
 3186                                         SCTP_INP_INCR_REF(it->inp);
 3187                                 }
 3188                         }
 3189                         /*
 3190                          * When its put in the refcnt is incremented so decr
 3191                          * it
 3192                          */
 3193                         SCTP_INP_DECR_REF(inp);
 3194                 }
 3195         }
 3196         SCTP_IPI_ITERATOR_WQ_UNLOCK();
 3197 }
 3198 
 3199 /* release sctp_inpcb unbind the port */
 3200 void
 3201 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from)
 3202 {
 3203         /*
 3204          * Here we free a endpoint. We must find it (if it is in the Hash
 3205          * table) and remove it from there. Then we must also find it in the
 3206          * overall list and remove it from there. After all removals are
 3207          * complete then any timer has to be stopped. Then start the actual
 3208          * freeing. a) Any local lists. b) Any associations. c) The hash of
 3209          * all associations. d) finally the ep itself.
 3210          */
 3211         struct sctp_tcb *asoc, *nasoc;
 3212         struct sctp_laddr *laddr, *nladdr;
 3213         struct inpcb *ip_pcb;
 3214         struct socket *so;
 3215         int being_refed = 0;
 3216         struct sctp_queued_to_read *sq, *nsq;
 3217         int cnt;
 3218         sctp_sharedkey_t *shared_key, *nshared_key;
 3219 
 3220 
 3221 #ifdef SCTP_LOG_CLOSING
 3222         sctp_log_closing(inp, NULL, 0);
 3223 #endif
 3224         SCTP_ITERATOR_LOCK();
 3225         /* mark any iterators on the list or being processed */
 3226         sctp_iterator_inp_being_freed(inp);
 3227         SCTP_ITERATOR_UNLOCK();
 3228         so = inp->sctp_socket;
 3229         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
 3230                 /* been here before.. eeks.. get out of here */
 3231                 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate);
 3232 #ifdef SCTP_LOG_CLOSING
 3233                 sctp_log_closing(inp, NULL, 1);
 3234 #endif
 3235                 return;
 3236         }
 3237         SCTP_ASOC_CREATE_LOCK(inp);
 3238         SCTP_INP_INFO_WLOCK();
 3239 
 3240         SCTP_INP_WLOCK(inp);
 3241         if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) {
 3242                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP;
 3243                 /* socket is gone, so no more wakeups allowed */
 3244                 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE;
 3245                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT;
 3246                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT;
 3247 
 3248         }
 3249         /* First time through we have the socket lock, after that no more. */
 3250         sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL,
 3251             SCTP_FROM_SCTP_PCB + SCTP_LOC_1);
 3252 
 3253         if (inp->control) {
 3254                 sctp_m_freem(inp->control);
 3255                 inp->control = NULL;
 3256         }
 3257         if (inp->pkt) {
 3258                 sctp_m_freem(inp->pkt);
 3259                 inp->pkt = NULL;
 3260         }
 3261         ip_pcb = &inp->ip_inp.inp;      /* we could just cast the main pointer
 3262                                          * here but I will be nice :> (i.e.
 3263                                          * ip_pcb = ep;) */
 3264         if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
 3265                 int cnt_in_sd;
 3266 
 3267                 cnt_in_sd = 0;
 3268                 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
 3269                         SCTP_TCB_LOCK(asoc);
 3270                         if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
 3271                                 /* Skip guys being freed */
 3272                                 cnt_in_sd++;
 3273                                 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
 3274                                         /*
 3275                                          * Special case - we did not start a
 3276                                          * kill timer on the asoc due to it
 3277                                          * was not closed. So go ahead and
 3278                                          * start it now.
 3279                                          */
 3280                                         asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
 3281                                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
 3282                                 }
 3283                                 SCTP_TCB_UNLOCK(asoc);
 3284                                 continue;
 3285                         }
 3286                         if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) ||
 3287                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) &&
 3288                             (asoc->asoc.total_output_queue_size == 0)) {
 3289                                 /*
 3290                                  * If we have data in queue, we don't want
 3291                                  * to just free since the app may have done,
 3292                                  * send()/close or connect/send/close. And
 3293                                  * it wants the data to get across first.
 3294                                  */
 3295                                 /* Just abandon things in the front states */
 3296                                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE,
 3297                                     SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) {
 3298                                         cnt_in_sd++;
 3299                                 }
 3300                                 continue;
 3301                         }
 3302                         /* Disconnect the socket please */
 3303                         asoc->sctp_socket = NULL;
 3304                         asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET;
 3305                         if ((asoc->asoc.size_on_reasm_queue > 0) ||
 3306                             (asoc->asoc.control_pdapi) ||
 3307                             (asoc->asoc.size_on_all_streams > 0) ||
 3308                             (so && (so->so_rcv.sb_cc > 0))) {
 3309                                 /* Left with Data unread */
 3310                                 struct mbuf *op_err;
 3311 
 3312                                 op_err = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr),
 3313                                     0, M_DONTWAIT, 1, MT_DATA);
 3314                                 if (op_err) {
 3315                                         /* Fill in the user initiated abort */
 3316                                         struct sctp_paramhdr *ph;
 3317 
 3318                                         SCTP_BUF_LEN(op_err) = sizeof(struct sctp_paramhdr);
 3319                                         ph = mtod(op_err, struct sctp_paramhdr *);
 3320                                         ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
 3321                                         ph->param_length = htons(SCTP_BUF_LEN(op_err));
 3322                                 }
 3323                                 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3;
 3324                                 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
 3325                                 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
 3326                                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
 3327                                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
 3328                                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
 3329                                 }
 3330                                 if (sctp_free_assoc(inp, asoc,
 3331                                     SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) {
 3332                                         cnt_in_sd++;
 3333                                 }
 3334                                 continue;
 3335                         } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
 3336                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
 3337                             (asoc->asoc.stream_queue_cnt == 0)) {
 3338                                 if (asoc->asoc.locked_on_sending) {
 3339                                         goto abort_anyway;
 3340                                 }
 3341                                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
 3342                                     (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
 3343                                         struct sctp_nets *netp;
 3344 
 3345                                         /*
 3346                                          * there is nothing queued to send,
 3347                                          * so I send shutdown
 3348                                          */
 3349                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
 3350                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
 3351                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
 3352                                         }
 3353                                         SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT);
 3354                                         SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING);
 3355                                         sctp_stop_timers_for_shutdown(asoc);
 3356                                         if (asoc->asoc.alternate) {
 3357                                                 netp = asoc->asoc.alternate;
 3358                                         } else {
 3359                                                 netp = asoc->asoc.primary_destination;
 3360                                         }
 3361                                         sctp_send_shutdown(asoc, netp);
 3362                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
 3363                                             netp);
 3364                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
 3365                                             asoc->asoc.primary_destination);
 3366                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED);
 3367                                 }
 3368                         } else {
 3369                                 /* mark into shutdown pending */
 3370                                 struct sctp_stream_queue_pending *sp;
 3371 
 3372                                 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING;
 3373                                 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
 3374                                     asoc->asoc.primary_destination);
 3375                                 if (asoc->asoc.locked_on_sending) {
 3376                                         sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue),
 3377                                             sctp_streamhead);
 3378                                         if (sp == NULL) {
 3379                                                 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n",
 3380                                                     (void *)asoc->asoc.locked_on_sending,
 3381                                                     asoc->asoc.locked_on_sending->stream_no);
 3382                                         } else {
 3383                                                 if ((sp->length == 0) && (sp->msg_is_complete == 0))
 3384                                                         asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT;
 3385                                         }
 3386                                 }
 3387                                 if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
 3388                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
 3389                                     (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
 3390                                         struct mbuf *op_err;
 3391 
 3392                         abort_anyway:
 3393                                         op_err = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr),
 3394                                             0, M_DONTWAIT, 1, MT_DATA);
 3395                                         if (op_err) {
 3396                                                 /*
 3397                                                  * Fill in the user
 3398                                                  * initiated abort
 3399                                                  */
 3400                                                 struct sctp_paramhdr *ph;
 3401 
 3402                                                 SCTP_BUF_LEN(op_err) = sizeof(struct sctp_paramhdr);
 3403                                                 ph = mtod(op_err, struct sctp_paramhdr *);
 3404                                                 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
 3405                                                 ph->param_length = htons(SCTP_BUF_LEN(op_err));
 3406                                         }
 3407                                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5;
 3408                                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
 3409                                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
 3410                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
 3411                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
 3412                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
 3413                                         }
 3414                                         if (sctp_free_assoc(inp, asoc,
 3415                                             SCTP_PCBFREE_NOFORCE,
 3416                                             SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) {
 3417                                                 cnt_in_sd++;
 3418                                         }
 3419                                         continue;
 3420                                 } else {
 3421                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED);
 3422                                 }
 3423                         }
 3424                         cnt_in_sd++;
 3425                         SCTP_TCB_UNLOCK(asoc);
 3426                 }
 3427                 /* now is there some left in our SHUTDOWN state? */
 3428                 if (cnt_in_sd) {
 3429 #ifdef SCTP_LOG_CLOSING
 3430                         sctp_log_closing(inp, NULL, 2);
 3431 #endif
 3432                         inp->sctp_socket = NULL;
 3433                         SCTP_INP_WUNLOCK(inp);
 3434                         SCTP_ASOC_CREATE_UNLOCK(inp);
 3435                         SCTP_INP_INFO_WUNLOCK();
 3436                         return;
 3437                 }
 3438         }
 3439         inp->sctp_socket = NULL;
 3440         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
 3441             SCTP_PCB_FLAGS_UNBOUND) {
 3442                 /*
 3443                  * ok, this guy has been bound. It's port is somewhere in
 3444                  * the SCTP_BASE_INFO(hash table). Remove it!
 3445                  */
 3446                 LIST_REMOVE(inp, sctp_hash);
 3447                 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND;
 3448         }
 3449         /*
 3450          * If there is a timer running to kill us, forget it, since it may
 3451          * have a contest on the INP lock.. which would cause us to die ...
 3452          */
 3453         cnt = 0;
 3454         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
 3455                 SCTP_TCB_LOCK(asoc);
 3456                 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
 3457                         if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
 3458                                 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
 3459                                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
 3460                         }
 3461                         cnt++;
 3462                         SCTP_TCB_UNLOCK(asoc);
 3463                         continue;
 3464                 }
 3465                 /* Free associations that are NOT killing us */
 3466                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) &&
 3467                     ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) {
 3468                         struct mbuf *op_err;
 3469 
 3470                         op_err = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr),
 3471                             0, M_DONTWAIT, 1, MT_DATA);
 3472                         if (op_err) {
 3473                                 /* Fill in the user initiated abort */
 3474                                 struct sctp_paramhdr *ph;
 3475 
 3476                                 SCTP_BUF_LEN(op_err) = sizeof(struct sctp_paramhdr);
 3477                                 ph = mtod(op_err, struct sctp_paramhdr *);
 3478                                 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
 3479                                 ph->param_length = htons(SCTP_BUF_LEN(op_err));
 3480                         }
 3481                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7;
 3482                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
 3483                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
 3484                 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
 3485                         cnt++;
 3486                         SCTP_TCB_UNLOCK(asoc);
 3487                         continue;
 3488                 }
 3489                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
 3490                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
 3491                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
 3492                 }
 3493                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) {
 3494                         cnt++;
 3495                 }
 3496         }
 3497         if (cnt) {
 3498                 /* Ok we have someone out there that will kill us */
 3499                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
 3500 #ifdef SCTP_LOG_CLOSING
 3501                 sctp_log_closing(inp, NULL, 3);
 3502 #endif
 3503                 SCTP_INP_WUNLOCK(inp);
 3504                 SCTP_ASOC_CREATE_UNLOCK(inp);
 3505                 SCTP_INP_INFO_WUNLOCK();
 3506                 return;
 3507         }
 3508         if (SCTP_INP_LOCK_CONTENDED(inp))
 3509                 being_refed++;
 3510         if (SCTP_INP_READ_CONTENDED(inp))
 3511                 being_refed++;
 3512         if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp))
 3513                 being_refed++;
 3514 
 3515         if ((inp->refcount) ||
 3516             (being_refed) ||
 3517             (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) {
 3518                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
 3519 #ifdef SCTP_LOG_CLOSING
 3520                 sctp_log_closing(inp, NULL, 4);
 3521 #endif
 3522                 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
 3523                 SCTP_INP_WUNLOCK(inp);
 3524                 SCTP_ASOC_CREATE_UNLOCK(inp);
 3525                 SCTP_INP_INFO_WUNLOCK();
 3526                 return;
 3527         }
 3528         inp->sctp_ep.signature_change.type = 0;
 3529         inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
 3530         /*
 3531          * Remove it from the list .. last thing we need a lock for.
 3532          */
 3533         LIST_REMOVE(inp, sctp_list);
 3534         SCTP_INP_WUNLOCK(inp);
 3535         SCTP_ASOC_CREATE_UNLOCK(inp);
 3536         SCTP_INP_INFO_WUNLOCK();
 3537         /*
 3538          * Now we release all locks. Since this INP cannot be found anymore
 3539          * except possibly by the kill timer that might be running. We call
 3540          * the drain function here. It should hit the case were it sees the
 3541          * ACTIVE flag cleared and exit out freeing us to proceed and
 3542          * destroy everything.
 3543          */
 3544         if (from != SCTP_CALLED_FROM_INPKILL_TIMER) {
 3545                 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer);
 3546         } else {
 3547                 /* Probably un-needed */
 3548                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
 3549         }
 3550 
 3551 #ifdef SCTP_LOG_CLOSING
 3552         sctp_log_closing(inp, NULL, 5);
 3553 #endif
 3554 
 3555 
 3556         if ((inp->sctp_asocidhash) != NULL) {
 3557                 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark);
 3558                 inp->sctp_asocidhash = NULL;
 3559         }
 3560         /* sa_ignore FREED_MEMORY */
 3561         TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) {
 3562                 /* Its only abandoned if it had data left */
 3563                 if (sq->length)
 3564                         SCTP_STAT_INCR(sctps_left_abandon);
 3565 
 3566                 TAILQ_REMOVE(&inp->read_queue, sq, next);
 3567                 sctp_free_remote_addr(sq->whoFrom);
 3568                 if (so)
 3569                         so->so_rcv.sb_cc -= sq->length;
 3570                 if (sq->data) {
 3571                         sctp_m_freem(sq->data);
 3572                         sq->data = NULL;
 3573                 }
 3574                 /*
 3575                  * no need to free the net count, since at this point all
 3576                  * assoc's are gone.
 3577                  */
 3578                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq);
 3579                 SCTP_DECR_READQ_COUNT();
 3580         }
 3581         /* Now the sctp_pcb things */
 3582         /*
 3583          * free each asoc if it is not already closed/free. we can't use the
 3584          * macro here since le_next will get freed as part of the
 3585          * sctp_free_assoc() call.
 3586          */
 3587         if (so) {
 3588 #ifdef IPSEC
 3589                 ipsec_delete_pcbpolicy(ip_pcb);
 3590 #endif                          /* IPSEC */
 3591 
 3592                 /* Unlocks not needed since the socket is gone now */
 3593         }
 3594         if (ip_pcb->inp_options) {
 3595                 (void)sctp_m_free(ip_pcb->inp_options);
 3596                 ip_pcb->inp_options = 0;
 3597         }
 3598 #ifdef INET6
 3599         if (ip_pcb->inp_vflag & INP_IPV6) {
 3600                 struct in6pcb *in6p;
 3601 
 3602                 in6p = (struct in6pcb *)inp;
 3603                 ip6_freepcbopts(in6p->in6p_outputopts);
 3604         }
 3605 #endif                          /* INET6 */
 3606         ip_pcb->inp_vflag = 0;
 3607         /* free up authentication fields */
 3608         if (inp->sctp_ep.local_auth_chunks != NULL)
 3609                 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
 3610         if (inp->sctp_ep.local_hmacs != NULL)
 3611                 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
 3612 
 3613         LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) {
 3614                 LIST_REMOVE(shared_key, next);
 3615                 sctp_free_sharedkey(shared_key);
 3616                 /* sa_ignore FREED_MEMORY */
 3617         }
 3618 
 3619         /*
 3620          * if we have an address list the following will free the list of
 3621          * ifaddr's that are set into this ep. Again macro limitations here,
 3622          * since the LIST_FOREACH could be a bad idea.
 3623          */
 3624         LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) {
 3625                 sctp_remove_laddr(laddr);
 3626         }
 3627 
 3628 #ifdef SCTP_TRACK_FREED_ASOCS
 3629         /* TEMP CODE */
 3630         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) {
 3631                 LIST_REMOVE(asoc, sctp_tcblist);
 3632                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc);
 3633                 SCTP_DECR_ASOC_COUNT();
 3634         }
 3635         /* *** END TEMP CODE *** */
 3636 #endif
 3637         /* Now lets see about freeing the EP hash table. */
 3638         if (inp->sctp_tcbhash != NULL) {
 3639                 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
 3640                 inp->sctp_tcbhash = NULL;
 3641         }
 3642         /* Now we must put the ep memory back into the zone pool */
 3643         INP_LOCK_DESTROY(&inp->ip_inp.inp);
 3644         SCTP_INP_LOCK_DESTROY(inp);
 3645         SCTP_INP_READ_DESTROY(inp);
 3646         SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
 3647         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
 3648         SCTP_DECR_EP_COUNT();
 3649 }
 3650 
 3651 
 3652 struct sctp_nets *
 3653 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
 3654 {
 3655         struct sctp_nets *net;
 3656 
 3657         /* locate the address */
 3658         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 3659                 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
 3660                         return (net);
 3661         }
 3662         return (NULL);
 3663 }
 3664 
 3665 
 3666 int
 3667 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id)
 3668 {
 3669         struct sctp_ifa *sctp_ifa;
 3670 
 3671         sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED);
 3672         if (sctp_ifa) {
 3673                 return (1);
 3674         } else {
 3675                 return (0);
 3676         }
 3677 }
 3678 
 3679 /*
 3680  * add's a remote endpoint address, done with the INIT/INIT-ACK as well as
 3681  * when a ASCONF arrives that adds it. It will also initialize all the cwnd
 3682  * stats of stuff.
 3683  */
 3684 int
 3685 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
 3686     struct sctp_nets **netp, int set_scope, int from)
 3687 {
 3688         /*
 3689          * The following is redundant to the same lines in the
 3690          * sctp_aloc_assoc() but is needed since others call the add address
 3691          * function
 3692          */
 3693         struct sctp_nets *net, *netfirst;
 3694         int addr_inscope;
 3695 
 3696         SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ",
 3697             from);
 3698         SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr);
 3699 
 3700         netfirst = sctp_findnet(stcb, newaddr);
 3701         if (netfirst) {
 3702                 /*
 3703                  * Lie and return ok, we don't want to make the association
 3704                  * go away for this behavior. It will happen in the TCP
 3705                  * model in a connected socket. It does not reach the hash
 3706                  * table until after the association is built so it can't be
 3707                  * found. Mark as reachable, since the initial creation will
 3708                  * have been cleared and the NOT_IN_ASSOC flag will have
 3709                  * been added... and we don't want to end up removing it
 3710                  * back out.
 3711                  */
 3712                 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
 3713                         netfirst->dest_state = (SCTP_ADDR_REACHABLE |
 3714                             SCTP_ADDR_UNCONFIRMED);
 3715                 } else {
 3716                         netfirst->dest_state = SCTP_ADDR_REACHABLE;
 3717                 }
 3718 
 3719                 return (0);
 3720         }
 3721         addr_inscope = 1;
 3722         switch (newaddr->sa_family) {
 3723 #ifdef INET
 3724         case AF_INET:
 3725                 {
 3726                         struct sockaddr_in *sin;
 3727 
 3728                         sin = (struct sockaddr_in *)newaddr;
 3729                         if (sin->sin_addr.s_addr == 0) {
 3730                                 /* Invalid address */
 3731                                 return (-1);
 3732                         }
 3733                         /* zero out the bzero area */
 3734                         memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
 3735 
 3736                         /* assure len is set */
 3737                         sin->sin_len = sizeof(struct sockaddr_in);
 3738                         if (set_scope) {
 3739 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE
 3740                                 stcb->ipv4_local_scope = 1;
 3741 #else
 3742                                 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
 3743                                         stcb->asoc.scope.ipv4_local_scope = 1;
 3744                                 }
 3745 #endif                          /* SCTP_DONT_DO_PRIVADDR_SCOPE */
 3746                         } else {
 3747                                 /* Validate the address is in scope */
 3748                                 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
 3749                                     (stcb->asoc.scope.ipv4_local_scope == 0)) {
 3750                                         addr_inscope = 0;
 3751                                 }
 3752                         }
 3753                         break;
 3754                 }
 3755 #endif
 3756 #ifdef INET6
 3757         case AF_INET6:
 3758                 {
 3759                         struct sockaddr_in6 *sin6;
 3760 
 3761                         sin6 = (struct sockaddr_in6 *)newaddr;
 3762                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
 3763                                 /* Invalid address */
 3764                                 return (-1);
 3765                         }
 3766                         /* assure len is set */
 3767                         sin6->sin6_len = sizeof(struct sockaddr_in6);
 3768                         if (set_scope) {
 3769                                 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) {
 3770                                         stcb->asoc.scope.loopback_scope = 1;
 3771                                         stcb->asoc.scope.local_scope = 0;
 3772                                         stcb->asoc.scope.ipv4_local_scope = 1;
 3773                                         stcb->asoc.scope.site_scope = 1;
 3774                                 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
 3775                                         /*
 3776                                          * If the new destination is a
 3777                                          * LINK_LOCAL we must have common
 3778                                          * site scope. Don't set the local
 3779                                          * scope since we may not share all
 3780                                          * links, only loopback can do this.
 3781                                          * Links on the local network would
 3782                                          * also be on our private network
 3783                                          * for v4 too.
 3784                                          */
 3785                                         stcb->asoc.scope.ipv4_local_scope = 1;
 3786                                         stcb->asoc.scope.site_scope = 1;
 3787                                 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
 3788                                         /*
 3789                                          * If the new destination is
 3790                                          * SITE_LOCAL then we must have site
 3791                                          * scope in common.
 3792                                          */
 3793                                         stcb->asoc.scope.site_scope = 1;
 3794                                 }
 3795                         } else {
 3796                                 /* Validate the address is in scope */
 3797                                 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
 3798                                     (stcb->asoc.scope.loopback_scope == 0)) {
 3799                                         addr_inscope = 0;
 3800                                 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
 3801                                     (stcb->asoc.scope.local_scope == 0)) {
 3802                                         addr_inscope = 0;
 3803                                 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
 3804                                     (stcb->asoc.scope.site_scope == 0)) {
 3805                                         addr_inscope = 0;
 3806                                 }
 3807                         }
 3808                         break;
 3809                 }
 3810 #endif
 3811         default:
 3812                 /* not supported family type */
 3813                 return (-1);
 3814         }
 3815         net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets);
 3816         if (net == NULL) {
 3817                 return (-1);
 3818         }
 3819         SCTP_INCR_RADDR_COUNT();
 3820         bzero(net, sizeof(struct sctp_nets));
 3821         (void)SCTP_GETTIME_TIMEVAL(&net->start_time);
 3822         memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
 3823         switch (newaddr->sa_family) {
 3824 #ifdef INET
 3825         case AF_INET:
 3826                 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
 3827                 break;
 3828 #endif
 3829 #ifdef INET6
 3830         case AF_INET6:
 3831                 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
 3832                 break;
 3833 #endif
 3834         default:
 3835                 break;
 3836         }
 3837         net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id);
 3838         if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) {
 3839                 stcb->asoc.scope.loopback_scope = 1;
 3840                 stcb->asoc.scope.ipv4_local_scope = 1;
 3841                 stcb->asoc.scope.local_scope = 0;
 3842                 stcb->asoc.scope.site_scope = 1;
 3843                 addr_inscope = 1;
 3844         }
 3845         net->failure_threshold = stcb->asoc.def_net_failure;
 3846         net->pf_threshold = stcb->asoc.def_net_pf_threshold;
 3847         if (addr_inscope == 0) {
 3848                 net->dest_state = (SCTP_ADDR_REACHABLE |
 3849                     SCTP_ADDR_OUT_OF_SCOPE);
 3850         } else {
 3851                 if (from == SCTP_ADDR_IS_CONFIRMED)
 3852                         /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */
 3853                         net->dest_state = SCTP_ADDR_REACHABLE;
 3854                 else
 3855                         net->dest_state = SCTP_ADDR_REACHABLE |
 3856                             SCTP_ADDR_UNCONFIRMED;
 3857         }
 3858         /*
 3859          * We set this to 0, the timer code knows that this means its an
 3860          * initial value
 3861          */
 3862         net->rto_needed = 1;
 3863         net->RTO = 0;
 3864         net->RTO_measured = 0;
 3865         stcb->asoc.numnets++;
 3866         net->ref_count = 1;
 3867         net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1;
 3868         net->port = stcb->asoc.port;
 3869         net->dscp = stcb->asoc.default_dscp;
 3870 #ifdef INET6
 3871         net->flowlabel = stcb->asoc.default_flowlabel;
 3872 #endif
 3873         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) {
 3874                 net->dest_state |= SCTP_ADDR_NOHB;
 3875         } else {
 3876                 net->dest_state &= ~SCTP_ADDR_NOHB;
 3877         }
 3878         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) {
 3879                 net->dest_state |= SCTP_ADDR_NO_PMTUD;
 3880         } else {
 3881                 net->dest_state &= ~SCTP_ADDR_NO_PMTUD;
 3882         }
 3883         net->heart_beat_delay = stcb->asoc.heart_beat_delay;
 3884         /* Init the timer structure */
 3885         SCTP_OS_TIMER_INIT(&net->rxt_timer.timer);
 3886         SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer);
 3887         SCTP_OS_TIMER_INIT(&net->hb_timer.timer);
 3888 
 3889         /* Now generate a route for this guy */
 3890 #ifdef INET6
 3891         /* KAME hack: embed scopeid */
 3892         if (newaddr->sa_family == AF_INET6) {
 3893                 struct sockaddr_in6 *sin6;
 3894 
 3895                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
 3896                 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
 3897                 sin6->sin6_scope_id = 0;
 3898         }
 3899 #endif
 3900         SCTP_RTALLOC((sctp_route_t *) & net->ro, stcb->asoc.vrf_id);
 3901 
 3902         if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) {
 3903                 /* Get source address */
 3904                 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep,
 3905                     stcb,
 3906                     (sctp_route_t *) & net->ro,
 3907                     net,
 3908                     0,
 3909                     stcb->asoc.vrf_id);
 3910                 /* Now get the interface MTU */
 3911                 if (net->ro._s_addr && net->ro._s_addr->ifn_p) {
 3912                         net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p);
 3913                 }
 3914                 if (net->mtu > 0) {
 3915                         uint32_t rmtu;
 3916 
 3917                         rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt);
 3918                         if (rmtu == 0) {
 3919                                 /*
 3920                                  * Start things off to match mtu of
 3921                                  * interface please.
 3922                                  */
 3923                                 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa,
 3924                                     net->ro.ro_rt, net->mtu);
 3925                         } else {
 3926                                 /*
 3927                                  * we take the route mtu over the interface,
 3928                                  * since the route may be leading out the
 3929                                  * loopback, or a different interface.
 3930                                  */
 3931                                 net->mtu = rmtu;
 3932                         }
 3933                 }
 3934         }
 3935         if (net->mtu == 0) {
 3936                 switch (newaddr->sa_family) {
 3937 #ifdef INET
 3938                 case AF_INET:
 3939                         net->mtu = SCTP_DEFAULT_MTU;
 3940                         break;
 3941 #endif
 3942 #ifdef INET6
 3943                 case AF_INET6:
 3944                         net->mtu = 1280;
 3945                         break;
 3946 #endif
 3947                 default:
 3948                         break;
 3949                 }
 3950         }
 3951         if (net->port) {
 3952                 net->mtu -= (uint32_t) sizeof(struct udphdr);
 3953         }
 3954         if (from == SCTP_ALLOC_ASOC) {
 3955                 stcb->asoc.smallest_mtu = net->mtu;
 3956         }
 3957         if (stcb->asoc.smallest_mtu > net->mtu) {
 3958                 stcb->asoc.smallest_mtu = net->mtu;
 3959         }
 3960 #ifdef INET6
 3961         if (newaddr->sa_family == AF_INET6) {
 3962                 struct sockaddr_in6 *sin6;
 3963 
 3964                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
 3965                 (void)sa6_recoverscope(sin6);
 3966         }
 3967 #endif
 3968 
 3969         /* JRS - Use the congestion control given in the CC module */
 3970         if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL)
 3971                 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net);
 3972 
 3973         /*
 3974          * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning
 3975          * of assoc (2005/06/27, iyengar@cis.udel.edu)
 3976          */
 3977         net->find_pseudo_cumack = 1;
 3978         net->find_rtx_pseudo_cumack = 1;
 3979         net->src_addr_selected = 0;
 3980         /* Choose an initial flowid. */
 3981         net->flowid = stcb->asoc.my_vtag ^
 3982             ntohs(stcb->rport) ^
 3983             ntohs(stcb->sctp_ep->sctp_lport);
 3984 #ifdef INVARIANTS
 3985         net->flowidset = 1;
 3986 #endif
 3987         if (netp) {
 3988                 *netp = net;
 3989         }
 3990         netfirst = TAILQ_FIRST(&stcb->asoc.nets);
 3991         if (net->ro.ro_rt == NULL) {
 3992                 /* Since we have no route put it at the back */
 3993                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
 3994         } else if (netfirst == NULL) {
 3995                 /* We are the first one in the pool. */
 3996                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
 3997         } else if (netfirst->ro.ro_rt == NULL) {
 3998                 /*
 3999                  * First one has NO route. Place this one ahead of the first
 4000                  * one.
 4001                  */
 4002                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
 4003         } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) {
 4004                 /*
 4005                  * This one has a different interface than the one at the
 4006                  * top of the list. Place it ahead.
 4007                  */
 4008                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
 4009         } else {
 4010                 /*
 4011                  * Ok we have the same interface as the first one. Move
 4012                  * forward until we find either a) one with a NULL route...
 4013                  * insert ahead of that b) one with a different ifp.. insert
 4014                  * after that. c) end of the list.. insert at the tail.
 4015                  */
 4016                 struct sctp_nets *netlook;
 4017 
 4018                 do {
 4019                         netlook = TAILQ_NEXT(netfirst, sctp_next);
 4020                         if (netlook == NULL) {
 4021                                 /* End of the list */
 4022                                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
 4023                                 break;
 4024                         } else if (netlook->ro.ro_rt == NULL) {
 4025                                 /* next one has NO route */
 4026                                 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
 4027                                 break;
 4028                         } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) {
 4029                                 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
 4030                                     net, sctp_next);
 4031                                 break;
 4032                         }
 4033                         /* Shift forward */
 4034                         netfirst = netlook;
 4035                 } while (netlook != NULL);
 4036         }
 4037 
 4038         /* got to have a primary set */
 4039         if (stcb->asoc.primary_destination == 0) {
 4040                 stcb->asoc.primary_destination = net;
 4041         } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) &&
 4042                     (net->ro.ro_rt) &&
 4043             ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
 4044                 /* No route to current primary adopt new primary */
 4045                 stcb->asoc.primary_destination = net;
 4046         }
 4047         /* Validate primary is first */
 4048         net = TAILQ_FIRST(&stcb->asoc.nets);
 4049         if ((net != stcb->asoc.primary_destination) &&
 4050             (stcb->asoc.primary_destination)) {
 4051                 /*
 4052                  * first one on the list is NOT the primary sctp_cmpaddr()
 4053                  * is much more efficient if the primary is the first on the
 4054                  * list, make it so.
 4055                  */
 4056                 TAILQ_REMOVE(&stcb->asoc.nets,
 4057                     stcb->asoc.primary_destination, sctp_next);
 4058                 TAILQ_INSERT_HEAD(&stcb->asoc.nets,
 4059                     stcb->asoc.primary_destination, sctp_next);
 4060         }
 4061         return (0);
 4062 }
 4063 
 4064 
 4065 static uint32_t
 4066 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
 4067 {
 4068         uint32_t id;
 4069         struct sctpasochead *head;
 4070         struct sctp_tcb *lstcb;
 4071 
 4072         SCTP_INP_WLOCK(inp);
 4073 try_again:
 4074         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
 4075                 /* TSNH */
 4076                 SCTP_INP_WUNLOCK(inp);
 4077                 return (0);
 4078         }
 4079         /*
 4080          * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC,
 4081          * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC.
 4082          */
 4083         if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) {
 4084                 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1;
 4085         }
 4086         id = inp->sctp_associd_counter;
 4087         inp->sctp_associd_counter++;
 4088         lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t) id, 0);
 4089         if (lstcb) {
 4090                 goto try_again;
 4091         }
 4092         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
 4093         LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash);
 4094         stcb->asoc.in_asocid_hash = 1;
 4095         SCTP_INP_WUNLOCK(inp);
 4096         return id;
 4097 }
 4098 
 4099 /*
 4100  * allocate an association and add it to the endpoint. The caller must be
 4101  * careful to add all additional addresses once they are know right away or
 4102  * else the assoc will be may experience a blackout scenario.
 4103  */
 4104 struct sctp_tcb *
 4105 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
 4106     int *error, uint32_t override_tag, uint32_t vrf_id,
 4107     struct thread *p
 4108 )
 4109 {
 4110         /* note the p argument is only valid in unbound sockets */
 4111 
 4112         struct sctp_tcb *stcb;
 4113         struct sctp_association *asoc;
 4114         struct sctpasochead *head;
 4115         uint16_t rport;
 4116         int err;
 4117 
 4118         /*
 4119          * Assumption made here: Caller has done a
 4120          * sctp_findassociation_ep_addr(ep, addr's); to make sure the
 4121          * address does not exist already.
 4122          */
 4123         if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) {
 4124                 /* Hit max assoc, sorry no more */
 4125                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
 4126                 *error = ENOBUFS;
 4127                 return (NULL);
 4128         }
 4129         if (firstaddr == NULL) {
 4130                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
 4131                 *error = EINVAL;
 4132                 return (NULL);
 4133         }
 4134         SCTP_INP_RLOCK(inp);
 4135         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) &&
 4136             ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) ||
 4137             (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) {
 4138                 /*
 4139                  * If its in the TCP pool, its NOT allowed to create an
 4140                  * association. The parent listener needs to call
 4141                  * sctp_aloc_assoc.. or the one-2-many socket. If a peeled
 4142                  * off, or connected one does this.. its an error.
 4143                  */
 4144                 SCTP_INP_RUNLOCK(inp);
 4145                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
 4146                 *error = EINVAL;
 4147                 return (NULL);
 4148         }
 4149         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) ||
 4150             (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) {
 4151                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) ||
 4152                     (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) {
 4153                         SCTP_INP_RUNLOCK(inp);
 4154                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
 4155                         *error = EINVAL;
 4156                         return (NULL);
 4157                 }
 4158         }
 4159         SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:");
 4160 #ifdef SCTP_DEBUG
 4161         if (firstaddr) {
 4162                 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr);
 4163                 switch (firstaddr->sa_family) {
 4164 #ifdef INET
 4165                 case AF_INET:
 4166                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
 4167                             ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
 4168                         break;
 4169 #endif
 4170 #ifdef INET6
 4171                 case AF_INET6:
 4172                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
 4173                             ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port));
 4174                         break;
 4175 #endif
 4176                 default:
 4177                         break;
 4178                 }
 4179         } else {
 4180                 SCTPDBG(SCTP_DEBUG_PCB3, "None\n");
 4181         }
 4182 #endif                          /* SCTP_DEBUG */
 4183         switch (firstaddr->sa_family) {
 4184 #ifdef INET
 4185         case AF_INET:
 4186                 {
 4187                         struct sockaddr_in *sin;
 4188 
 4189                         sin = (struct sockaddr_in *)firstaddr;
 4190                         if ((ntohs(sin->sin_port) == 0) ||
 4191                             (sin->sin_addr.s_addr == INADDR_ANY) ||
 4192                             (sin->sin_addr.s_addr == INADDR_BROADCAST) ||
 4193                             IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
 4194                                 /* Invalid address */
 4195                                 SCTP_INP_RUNLOCK(inp);
 4196                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
 4197                                 *error = EINVAL;
 4198                                 return (NULL);
 4199                         }
 4200                         rport = sin->sin_port;
 4201                         break;
 4202                 }
 4203 #endif
 4204 #ifdef INET6
 4205         case AF_INET6:
 4206                 {
 4207                         struct sockaddr_in6 *sin6;
 4208 
 4209                         sin6 = (struct sockaddr_in6 *)firstaddr;
 4210                         if ((ntohs(sin6->sin6_port) == 0) ||
 4211                             IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
 4212                             IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
 4213                                 /* Invalid address */
 4214                                 SCTP_INP_RUNLOCK(inp);
 4215                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
 4216                                 *error = EINVAL;
 4217                                 return (NULL);
 4218                         }
 4219                         rport = sin6->sin6_port;
 4220                         break;
 4221                 }
 4222 #endif
 4223         default:
 4224                 /* not supported family type */
 4225                 SCTP_INP_RUNLOCK(inp);
 4226                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
 4227                 *error = EINVAL;
 4228                 return (NULL);
 4229         }
 4230         SCTP_INP_RUNLOCK(inp);
 4231         if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
 4232                 /*
 4233                  * If you have not performed a bind, then we need to do the
 4234                  * ephemeral bind for you.
 4235                  */
 4236                 if ((err = sctp_inpcb_bind(inp->sctp_socket,
 4237                     (struct sockaddr *)NULL,
 4238                     (struct sctp_ifa *)NULL,
 4239                     p
 4240                     ))) {
 4241                         /* bind error, probably perm */
 4242                         *error = err;
 4243                         return (NULL);
 4244                 }
 4245         }
 4246         stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb);
 4247         if (stcb == NULL) {
 4248                 /* out of memory? */
 4249                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
 4250                 *error = ENOMEM;
 4251                 return (NULL);
 4252         }
 4253         SCTP_INCR_ASOC_COUNT();
 4254 
 4255         bzero(stcb, sizeof(*stcb));
 4256         asoc = &stcb->asoc;
 4257 
 4258         asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb);
 4259         SCTP_TCB_LOCK_INIT(stcb);
 4260         SCTP_TCB_SEND_LOCK_INIT(stcb);
 4261         stcb->rport = rport;
 4262         /* setup back pointer's */
 4263         stcb->sctp_ep = inp;
 4264         stcb->sctp_socket = inp->sctp_socket;
 4265         if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id))) {
 4266                 /* failed */
 4267                 SCTP_TCB_LOCK_DESTROY(stcb);
 4268                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
 4269                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
 4270                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
 4271                 SCTP_DECR_ASOC_COUNT();
 4272                 *error = err;
 4273                 return (NULL);
 4274         }
 4275         /* and the port */
 4276         SCTP_INP_INFO_WLOCK();
 4277         SCTP_INP_WLOCK(inp);
 4278         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
 4279                 /* inpcb freed while alloc going on */
 4280                 SCTP_TCB_LOCK_DESTROY(stcb);
 4281                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
 4282                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
 4283                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
 4284                 SCTP_INP_WUNLOCK(inp);
 4285                 SCTP_INP_INFO_WUNLOCK();
 4286                 SCTP_DECR_ASOC_COUNT();
 4287                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
 4288                 *error = EINVAL;
 4289                 return (NULL);
 4290         }
 4291         SCTP_TCB_LOCK(stcb);
 4292 
 4293         /* now that my_vtag is set, add it to the hash */
 4294         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
 4295         /* put it in the bucket in the vtag hash of assoc's for the system */
 4296         LIST_INSERT_HEAD(head, stcb, sctp_asocs);
 4297         SCTP_INP_INFO_WUNLOCK();
 4298 
 4299         if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) {
 4300                 /* failure.. memory error? */
 4301                 if (asoc->strmout) {
 4302                         SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
 4303                         asoc->strmout = NULL;
 4304                 }
 4305                 if (asoc->mapping_array) {
 4306                         SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
 4307                         asoc->mapping_array = NULL;
 4308                 }
 4309                 if (asoc->nr_mapping_array) {
 4310                         SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
 4311                         asoc->nr_mapping_array = NULL;
 4312                 }
 4313                 SCTP_DECR_ASOC_COUNT();
 4314                 SCTP_TCB_LOCK_DESTROY(stcb);
 4315                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
 4316                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
 4317                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
 4318                 SCTP_INP_WUNLOCK(inp);
 4319                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
 4320                 *error = ENOBUFS;
 4321                 return (NULL);
 4322         }
 4323         /* Init all the timers */
 4324         SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer);
 4325         SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer);
 4326         SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer);
 4327         SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer);
 4328         SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer);
 4329         SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer);
 4330         SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer);
 4331 
 4332         LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
 4333         /* now file the port under the hash as well */
 4334         if (inp->sctp_tcbhash != NULL) {
 4335                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
 4336                     inp->sctp_hashmark)];
 4337                 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
 4338         }
 4339         SCTP_INP_WUNLOCK(inp);
 4340         SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb);
 4341         return (stcb);
 4342 }
 4343 
 4344 
 4345 void
 4346 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net)
 4347 {
 4348         struct sctp_association *asoc;
 4349 
 4350         asoc = &stcb->asoc;
 4351         asoc->numnets--;
 4352         TAILQ_REMOVE(&asoc->nets, net, sctp_next);
 4353         if (net == asoc->primary_destination) {
 4354                 /* Reset primary */
 4355                 struct sctp_nets *lnet;
 4356 
 4357                 lnet = TAILQ_FIRST(&asoc->nets);
 4358                 /*
 4359                  * Mobility adaptation Ideally, if deleted destination is
 4360                  * the primary, it becomes a fast retransmission trigger by
 4361                  * the subsequent SET PRIMARY. (by micchie)
 4362                  */
 4363                 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
 4364                     SCTP_MOBILITY_BASE) ||
 4365                     sctp_is_mobility_feature_on(stcb->sctp_ep,
 4366                     SCTP_MOBILITY_FASTHANDOFF)) {
 4367                         SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n");
 4368                         if (asoc->deleted_primary != NULL) {
 4369                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n");
 4370                                 goto out;
 4371                         }
 4372                         asoc->deleted_primary = net;
 4373                         atomic_add_int(&net->ref_count, 1);
 4374                         memset(&net->lastsa, 0, sizeof(net->lastsa));
 4375                         memset(&net->lastsv, 0, sizeof(net->lastsv));
 4376                         sctp_mobility_feature_on(stcb->sctp_ep,
 4377                             SCTP_MOBILITY_PRIM_DELETED);
 4378                         sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED,
 4379                             stcb->sctp_ep, stcb, NULL);
 4380                 }
 4381 out:
 4382                 /* Try to find a confirmed primary */
 4383                 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0);
 4384         }
 4385         if (net == asoc->last_data_chunk_from) {
 4386                 /* Reset primary */
 4387                 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets);
 4388         }
 4389         if (net == asoc->last_control_chunk_from) {
 4390                 /* Clear net */
 4391                 asoc->last_control_chunk_from = NULL;
 4392         }
 4393         if (net == stcb->asoc.alternate) {
 4394                 sctp_free_remote_addr(stcb->asoc.alternate);
 4395                 stcb->asoc.alternate = NULL;
 4396         }
 4397         sctp_free_remote_addr(net);
 4398 }
 4399 
 4400 /*
 4401  * remove a remote endpoint address from an association, it will fail if the
 4402  * address does not exist.
 4403  */
 4404 int
 4405 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
 4406 {
 4407         /*
 4408          * Here we need to remove a remote address. This is quite simple, we
 4409          * first find it in the list of address for the association
 4410          * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE
 4411          * on that item. Note we do not allow it to be removed if there are
 4412          * no other addresses.
 4413          */
 4414         struct sctp_association *asoc;
 4415         struct sctp_nets *net, *nnet;
 4416 
 4417         asoc = &stcb->asoc;
 4418 
 4419         /* locate the address */
 4420         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
 4421                 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
 4422                         continue;
 4423                 }
 4424                 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
 4425                     remaddr)) {
 4426                         /* we found the guy */
 4427                         if (asoc->numnets < 2) {
 4428                                 /* Must have at LEAST two remote addresses */
 4429                                 return (-1);
 4430                         } else {
 4431                                 sctp_remove_net(stcb, net);
 4432                                 return (0);
 4433                         }
 4434                 }
 4435         }
 4436         /* not found. */
 4437         return (-2);
 4438 }
 4439 
 4440 void
 4441 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
 4442 {
 4443         struct sctpvtaghead *chain;
 4444         struct sctp_tagblock *twait_block;
 4445         int found = 0;
 4446         int i;
 4447 
 4448         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
 4449         if (!LIST_EMPTY(chain)) {
 4450                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
 4451                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
 4452                                 if ((twait_block->vtag_block[i].v_tag == tag) &&
 4453                                     (twait_block->vtag_block[i].lport == lport) &&
 4454                                     (twait_block->vtag_block[i].rport == rport)) {
 4455                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
 4456                                         twait_block->vtag_block[i].v_tag = 0;
 4457                                         twait_block->vtag_block[i].lport = 0;
 4458                                         twait_block->vtag_block[i].rport = 0;
 4459                                         found = 1;
 4460                                         break;
 4461                                 }
 4462                         }
 4463                         if (found)
 4464                                 break;
 4465                 }
 4466         }
 4467 }
 4468 
 4469 int
 4470 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
 4471 {
 4472         struct sctpvtaghead *chain;
 4473         struct sctp_tagblock *twait_block;
 4474         int found = 0;
 4475         int i;
 4476 
 4477         SCTP_INP_INFO_WLOCK();
 4478         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
 4479         if (!LIST_EMPTY(chain)) {
 4480                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
 4481                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
 4482                                 if ((twait_block->vtag_block[i].v_tag == tag) &&
 4483                                     (twait_block->vtag_block[i].lport == lport) &&
 4484                                     (twait_block->vtag_block[i].rport == rport)) {
 4485                                         found = 1;
 4486                                         break;
 4487                                 }
 4488                         }
 4489                         if (found)
 4490                                 break;
 4491                 }
 4492         }
 4493         SCTP_INP_INFO_WUNLOCK();
 4494         return (found);
 4495 }
 4496 
 4497 
 4498 void
 4499 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport)
 4500 {
 4501         struct sctpvtaghead *chain;
 4502         struct sctp_tagblock *twait_block;
 4503         struct timeval now;
 4504         int set, i;
 4505 
 4506         if (time == 0) {
 4507                 /* Its disabled */
 4508                 return;
 4509         }
 4510         (void)SCTP_GETTIME_TIMEVAL(&now);
 4511         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
 4512         set = 0;
 4513         if (!LIST_EMPTY(chain)) {
 4514                 /* Block(s) present, lets find space, and expire on the fly */
 4515                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
 4516                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
 4517                                 if ((twait_block->vtag_block[i].v_tag == 0) &&
 4518                                     !set) {
 4519                                         twait_block->vtag_block[i].tv_sec_at_expire =
 4520                                             now.tv_sec + time;
 4521                                         twait_block->vtag_block[i].v_tag = tag;
 4522                                         twait_block->vtag_block[i].lport = lport;
 4523                                         twait_block->vtag_block[i].rport = rport;
 4524                                         set = 1;
 4525                                 } else if ((twait_block->vtag_block[i].v_tag) &&
 4526                                     ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) {
 4527                                         /* Audit expires this guy */
 4528                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
 4529                                         twait_block->vtag_block[i].v_tag = 0;
 4530                                         twait_block->vtag_block[i].lport = 0;
 4531                                         twait_block->vtag_block[i].rport = 0;
 4532                                         if (set == 0) {
 4533                                                 /* Reuse it for my new tag */
 4534                                                 twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time;
 4535                                                 twait_block->vtag_block[i].v_tag = tag;
 4536                                                 twait_block->vtag_block[i].lport = lport;
 4537                                                 twait_block->vtag_block[i].rport = rport;
 4538                                                 set = 1;
 4539                                         }
 4540                                 }
 4541                         }
 4542                         if (set) {
 4543                                 /*
 4544                                  * We only do up to the block where we can
 4545                                  * place our tag for audits
 4546                                  */
 4547                                 break;
 4548                         }
 4549                 }
 4550         }
 4551         /* Need to add a new block to chain */
 4552         if (!set) {
 4553                 SCTP_MALLOC(twait_block, struct sctp_tagblock *,
 4554                     sizeof(struct sctp_tagblock), SCTP_M_TIMW);
 4555                 if (twait_block == NULL) {
 4556 #ifdef INVARIANTS
 4557                         panic("Can not alloc tagblock");
 4558 #endif
 4559                         return;
 4560                 }
 4561                 memset(twait_block, 0, sizeof(struct sctp_tagblock));
 4562                 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
 4563                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time;
 4564                 twait_block->vtag_block[0].v_tag = tag;
 4565                 twait_block->vtag_block[0].lport = lport;
 4566                 twait_block->vtag_block[0].rport = rport;
 4567         }
 4568 }
 4569 
 4570 
 4571 
 4572 /*-
 4573  * Free the association after un-hashing the remote port. This
 4574  * function ALWAYS returns holding NO LOCK on the stcb. It DOES
 4575  * expect that the input to this function IS a locked TCB.
 4576  * It will return 0, if it did NOT destroy the association (instead
 4577  * it unlocks it. It will return NON-zero if it either destroyed the
 4578  * association OR the association is already destroyed.
 4579  */
 4580 int
 4581 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location)
 4582 {
 4583         int i;
 4584         struct sctp_association *asoc;
 4585         struct sctp_nets *net, *nnet;
 4586         struct sctp_laddr *laddr, *naddr;
 4587         struct sctp_tmit_chunk *chk, *nchk;
 4588         struct sctp_asconf_addr *aparam, *naparam;
 4589         struct sctp_asconf_ack *aack, *naack;
 4590         struct sctp_stream_reset_list *strrst, *nstrrst;
 4591         struct sctp_queued_to_read *sq, *nsq;
 4592         struct sctp_stream_queue_pending *sp, *nsp;
 4593         sctp_sharedkey_t *shared_key, *nshared_key;
 4594         struct socket *so;
 4595 
 4596         /* first, lets purge the entry from the hash table. */
 4597 
 4598 #ifdef SCTP_LOG_CLOSING
 4599         sctp_log_closing(inp, stcb, 6);
 4600 #endif
 4601         if (stcb->asoc.state == 0) {
 4602 #ifdef SCTP_LOG_CLOSING
 4603                 sctp_log_closing(inp, NULL, 7);
 4604 #endif
 4605                 /* there is no asoc, really TSNH :-0 */
 4606                 return (1);
 4607         }
 4608         if (stcb->asoc.alternate) {
 4609                 sctp_free_remote_addr(stcb->asoc.alternate);
 4610                 stcb->asoc.alternate = NULL;
 4611         }
 4612         /* TEMP CODE */
 4613         if (stcb->freed_from_where == 0) {
 4614                 /* Only record the first place free happened from */
 4615                 stcb->freed_from_where = from_location;
 4616         }
 4617         /* TEMP CODE */
 4618 
 4619         asoc = &stcb->asoc;
 4620         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
 4621             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
 4622                 /* nothing around */
 4623                 so = NULL;
 4624         else
 4625                 so = inp->sctp_socket;
 4626 
 4627         /*
 4628          * We used timer based freeing if a reader or writer is in the way.
 4629          * So we first check if we are actually being called from a timer,
 4630          * if so we abort early if a reader or writer is still in the way.
 4631          */
 4632         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
 4633             (from_inpcbfree == SCTP_NORMAL_PROC)) {
 4634                 /*
 4635                  * is it the timer driving us? if so are the reader/writers
 4636                  * gone?
 4637                  */
 4638                 if (stcb->asoc.refcnt) {
 4639                         /* nope, reader or writer in the way */
 4640                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
 4641                         /* no asoc destroyed */
 4642                         SCTP_TCB_UNLOCK(stcb);
 4643 #ifdef SCTP_LOG_CLOSING
 4644                         sctp_log_closing(inp, stcb, 8);
 4645 #endif
 4646                         return (0);
 4647                 }
 4648         }
 4649         /* now clean up any other timers */
 4650         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
 4651         asoc->dack_timer.self = NULL;
 4652         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
 4653         /*-
 4654          * For stream reset we don't blast this unless
 4655          * it is a str-reset timer, it might be the
 4656          * free-asoc timer which we DON'T want to
 4657          * disturb.
 4658          */
 4659         if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET)
 4660                 asoc->strreset_timer.self = NULL;
 4661         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
 4662         asoc->asconf_timer.self = NULL;
 4663         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
 4664         asoc->autoclose_timer.self = NULL;
 4665         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
 4666         asoc->shut_guard_timer.self = NULL;
 4667         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
 4668         asoc->delayed_event_timer.self = NULL;
 4669         /* Mobility adaptation */
 4670         (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer);
 4671         asoc->delete_prim_timer.self = NULL;
 4672         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
 4673                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
 4674                 net->rxt_timer.self = NULL;
 4675                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
 4676                 net->pmtu_timer.self = NULL;
 4677                 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer);
 4678                 net->hb_timer.self = NULL;
 4679         }
 4680         /* Now the read queue needs to be cleaned up (only once) */
 4681         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) {
 4682                 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED;
 4683                 SCTP_INP_READ_LOCK(inp);
 4684                 TAILQ_FOREACH(sq, &inp->read_queue, next) {
 4685                         if (sq->stcb == stcb) {
 4686                                 sq->do_not_ref_stcb = 1;
 4687                                 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
 4688                                 /*
 4689                                  * If there is no end, there never will be
 4690                                  * now.
 4691                                  */
 4692                                 if (sq->end_added == 0) {
 4693                                         /* Held for PD-API clear that. */
 4694                                         sq->pdapi_aborted = 1;
 4695                                         sq->held_length = 0;
 4696                                         if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) {
 4697                                                 /*
 4698                                                  * Need to add a PD-API
 4699                                                  * aborted indication.
 4700                                                  * Setting the control_pdapi
 4701                                                  * assures that it will be
 4702                                                  * added right after this
 4703                                                  * msg.
 4704                                                  */
 4705                                                 uint32_t strseq;
 4706 
 4707                                                 stcb->asoc.control_pdapi = sq;
 4708                                                 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn;
 4709                                                 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION,
 4710                                                     stcb,
 4711                                                     SCTP_PARTIAL_DELIVERY_ABORTED,
 4712                                                     (void *)&strseq,
 4713                                                     SCTP_SO_LOCKED);
 4714                                                 stcb->asoc.control_pdapi = NULL;
 4715                                         }
 4716                                 }
 4717                                 /* Add an end to wake them */
 4718                                 sq->end_added = 1;
 4719                         }
 4720                 }
 4721                 SCTP_INP_READ_UNLOCK(inp);
 4722                 if (stcb->block_entry) {
 4723                         SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET);
 4724                         stcb->block_entry->error = ECONNRESET;
 4725                         stcb->block_entry = NULL;
 4726                 }
 4727         }
 4728         if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) {
 4729                 /*
 4730                  * Someone holds a reference OR the socket is unaccepted
 4731                  * yet.
 4732                  */
 4733                 if ((stcb->asoc.refcnt) ||
 4734                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
 4735                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) {
 4736                         stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
 4737                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
 4738                 }
 4739                 SCTP_TCB_UNLOCK(stcb);
 4740                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
 4741                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
 4742                         /* nothing around */
 4743                         so = NULL;
 4744                 if (so) {
 4745                         /* Wake any reader/writers */
 4746                         sctp_sorwakeup(inp, so);
 4747                         sctp_sowwakeup(inp, so);
 4748                 }
 4749 #ifdef SCTP_LOG_CLOSING
 4750                 sctp_log_closing(inp, stcb, 9);
 4751 #endif
 4752                 /* no asoc destroyed */
 4753                 return (0);
 4754         }
 4755 #ifdef SCTP_LOG_CLOSING
 4756         sctp_log_closing(inp, stcb, 10);
 4757 #endif
 4758         /*
 4759          * When I reach here, no others want to kill the assoc yet.. and I
 4760          * own the lock. Now its possible an abort comes in when I do the
 4761          * lock exchange below to grab all the locks to do the final take
 4762          * out. to prevent this we increment the count, which will start a
 4763          * timer and blow out above thus assuring us that we hold exclusive
 4764          * killing of the asoc. Note that after getting back the TCB lock we
 4765          * will go ahead and increment the counter back up and stop any
 4766          * timer a passing stranger may have started :-S
 4767          */
 4768         if (from_inpcbfree == SCTP_NORMAL_PROC) {
 4769                 atomic_add_int(&stcb->asoc.refcnt, 1);
 4770 
 4771                 SCTP_TCB_UNLOCK(stcb);
 4772                 SCTP_INP_INFO_WLOCK();
 4773                 SCTP_INP_WLOCK(inp);
 4774                 SCTP_TCB_LOCK(stcb);
 4775         }
 4776         /* Double check the GONE flag */
 4777         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
 4778             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
 4779                 /* nothing around */
 4780                 so = NULL;
 4781 
 4782         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
 4783             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
 4784                 /*
 4785                  * For TCP type we need special handling when we are
 4786                  * connected. We also include the peel'ed off ones to.
 4787                  */
 4788                 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
 4789                         inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
 4790                         inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED;
 4791                         if (so) {
 4792                                 SOCK_LOCK(so);
 4793                                 if (so->so_rcv.sb_cc == 0) {
 4794                                         so->so_state &= ~(SS_ISCONNECTING |
 4795                                             SS_ISDISCONNECTING |
 4796                                             SS_ISCONFIRMING |
 4797                                             SS_ISCONNECTED);
 4798                                 }
 4799                                 socantrcvmore_locked(so);
 4800                                 sctp_sowwakeup(inp, so);
 4801                                 sctp_sorwakeup(inp, so);
 4802                                 SCTP_SOWAKEUP(so);
 4803                         }
 4804                 }
 4805         }
 4806         /*
 4807          * Make it invalid too, that way if its about to run it will abort
 4808          * and return.
 4809          */
 4810         /* re-increment the lock */
 4811         if (from_inpcbfree == SCTP_NORMAL_PROC) {
 4812                 atomic_add_int(&stcb->asoc.refcnt, -1);
 4813         }
 4814         if (stcb->asoc.refcnt) {
 4815                 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
 4816                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
 4817                 if (from_inpcbfree == SCTP_NORMAL_PROC) {
 4818                         SCTP_INP_INFO_WUNLOCK();
 4819                         SCTP_INP_WUNLOCK(inp);
 4820                 }
 4821                 SCTP_TCB_UNLOCK(stcb);
 4822                 return (0);
 4823         }
 4824         asoc->state = 0;
 4825         if (inp->sctp_tcbhash) {
 4826                 LIST_REMOVE(stcb, sctp_tcbhash);
 4827         }
 4828         if (stcb->asoc.in_asocid_hash) {
 4829                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
 4830         }
 4831         /* Now lets remove it from the list of ALL associations in the EP */
 4832         LIST_REMOVE(stcb, sctp_tcblist);
 4833         if (from_inpcbfree == SCTP_NORMAL_PROC) {
 4834                 SCTP_INP_INCR_REF(inp);
 4835                 SCTP_INP_WUNLOCK(inp);
 4836         }
 4837         /* pull from vtag hash */
 4838         LIST_REMOVE(stcb, sctp_asocs);
 4839         sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait),
 4840             inp->sctp_lport, stcb->rport);
 4841 
 4842         /*
 4843          * Now restop the timers to be sure this is paranoia at is finest!
 4844          */
 4845         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
 4846         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
 4847         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
 4848         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
 4849         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
 4850         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
 4851         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
 4852         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
 4853                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
 4854                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
 4855                 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer);
 4856         }
 4857 
 4858         asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE;
 4859         /*
 4860          * The chunk lists and such SHOULD be empty but we check them just
 4861          * in case.
 4862          */
 4863         /* anything on the wheel needs to be removed */
 4864         for (i = 0; i < asoc->streamoutcnt; i++) {
 4865                 struct sctp_stream_out *outs;
 4866 
 4867                 outs = &asoc->strmout[i];
 4868                 /* now clean up any chunks here */
 4869                 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) {
 4870                         TAILQ_REMOVE(&outs->outqueue, sp, next);
 4871                         sctp_free_spbufspace(stcb, asoc, sp);
 4872                         if (sp->data) {
 4873                                 if (so) {
 4874                                         /* Still an open socket - report */
 4875                                         sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb,
 4876                                             0, (void *)sp, SCTP_SO_LOCKED);
 4877                                 }
 4878                                 if (sp->data) {
 4879                                         sctp_m_freem(sp->data);
 4880                                         sp->data = NULL;
 4881                                         sp->tail_mbuf = NULL;
 4882                                         sp->length = 0;
 4883                                 }
 4884                         }
 4885                         if (sp->net) {
 4886                                 sctp_free_remote_addr(sp->net);
 4887                                 sp->net = NULL;
 4888                         }
 4889                         sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
 4890                 }
 4891         }
 4892         /* sa_ignore FREED_MEMORY */
 4893         TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) {
 4894                 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp);
 4895                 SCTP_FREE(strrst, SCTP_M_STRESET);
 4896         }
 4897         TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) {
 4898                 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
 4899                 if (sq->data) {
 4900                         sctp_m_freem(sq->data);
 4901                         sq->data = NULL;
 4902                 }
 4903                 sctp_free_remote_addr(sq->whoFrom);
 4904                 sq->whoFrom = NULL;
 4905                 sq->stcb = NULL;
 4906                 /* Free the ctl entry */
 4907                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq);
 4908                 SCTP_DECR_READQ_COUNT();
 4909                 /* sa_ignore FREED_MEMORY */
 4910         }
 4911         TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) {
 4912                 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next);
 4913                 if (chk->data) {
 4914                         sctp_m_freem(chk->data);
 4915                         chk->data = NULL;
 4916                 }
 4917                 if (chk->holds_key_ref)
 4918                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
 4919                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
 4920                 SCTP_DECR_CHK_COUNT();
 4921                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1);
 4922                 asoc->free_chunk_cnt--;
 4923                 /* sa_ignore FREED_MEMORY */
 4924         }
 4925         /* pending send queue SHOULD be empty */
 4926         TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
 4927                 if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) {
 4928                         asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--;
 4929 #ifdef INVARIANTS
 4930                 } else {
 4931                         panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number);
 4932 #endif
 4933                 }
 4934                 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
 4935                 if (chk->data) {
 4936                         if (so) {
 4937                                 /* Still a socket? */
 4938                                 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb,
 4939                                     0, chk, SCTP_SO_LOCKED);
 4940                         }
 4941                         if (chk->data) {
 4942                                 sctp_m_freem(chk->data);
 4943                                 chk->data = NULL;
 4944                         }
 4945                 }
 4946                 if (chk->holds_key_ref)
 4947                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
 4948                 if (chk->whoTo) {
 4949                         sctp_free_remote_addr(chk->whoTo);
 4950                         chk->whoTo = NULL;
 4951                 }
 4952                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
 4953                 SCTP_DECR_CHK_COUNT();
 4954                 /* sa_ignore FREED_MEMORY */
 4955         }
 4956         /* sent queue SHOULD be empty */
 4957         TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) {
 4958                 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) {
 4959                         if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) {
 4960                                 asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--;
 4961 #ifdef INVARIANTS
 4962                         } else {
 4963                                 panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number);
 4964 #endif
 4965                         }
 4966                 }
 4967                 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
 4968                 if (chk->data) {
 4969                         if (so) {
 4970                                 /* Still a socket? */
 4971                                 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb,
 4972                                     0, chk, SCTP_SO_LOCKED);
 4973                         }
 4974                         if (chk->data) {
 4975                                 sctp_m_freem(chk->data);
 4976                                 chk->data = NULL;
 4977                         }
 4978                 }
 4979                 if (chk->holds_key_ref)
 4980                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
 4981                 sctp_free_remote_addr(chk->whoTo);
 4982                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
 4983                 SCTP_DECR_CHK_COUNT();
 4984                 /* sa_ignore FREED_MEMORY */
 4985         }
 4986 #ifdef INVARIANTS
 4987         for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
 4988                 if (stcb->asoc.strmout[i].chunks_on_queues > 0) {
 4989                         panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i);
 4990                 }
 4991         }
 4992 #endif
 4993         /* control queue MAY not be empty */
 4994         TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
 4995                 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
 4996                 if (chk->data) {
 4997                         sctp_m_freem(chk->data);
 4998                         chk->data = NULL;
 4999                 }
 5000                 if (chk->holds_key_ref)
 5001                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
 5002                 sctp_free_remote_addr(chk->whoTo);
 5003                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
 5004                 SCTP_DECR_CHK_COUNT();
 5005                 /* sa_ignore FREED_MEMORY */
 5006         }
 5007         /* ASCONF queue MAY not be empty */
 5008         TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
 5009                 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
 5010                 if (chk->data) {
 5011                         sctp_m_freem(chk->data);
 5012                         chk->data = NULL;
 5013                 }
 5014                 if (chk->holds_key_ref)
 5015                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
 5016                 sctp_free_remote_addr(chk->whoTo);
 5017                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
 5018                 SCTP_DECR_CHK_COUNT();
 5019                 /* sa_ignore FREED_MEMORY */
 5020         }
 5021         TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) {
 5022                 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
 5023                 if (chk->data) {
 5024                         sctp_m_freem(chk->data);
 5025                         chk->data = NULL;
 5026                 }
 5027                 if (chk->holds_key_ref)
 5028                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
 5029                 sctp_free_remote_addr(chk->whoTo);
 5030                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
 5031                 SCTP_DECR_CHK_COUNT();
 5032                 /* sa_ignore FREED_MEMORY */
 5033         }
 5034 
 5035         if (asoc->mapping_array) {
 5036                 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
 5037                 asoc->mapping_array = NULL;
 5038         }
 5039         if (asoc->nr_mapping_array) {
 5040                 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
 5041                 asoc->nr_mapping_array = NULL;
 5042         }
 5043         /* the stream outs */
 5044         if (asoc->strmout) {
 5045                 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
 5046                 asoc->strmout = NULL;
 5047         }
 5048         asoc->strm_realoutsize = asoc->streamoutcnt = 0;
 5049         if (asoc->strmin) {
 5050                 struct sctp_queued_to_read *ctl, *nctl;
 5051 
 5052                 for (i = 0; i < asoc->streamincnt; i++) {
 5053                         TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[i].inqueue, next, nctl) {
 5054                                 TAILQ_REMOVE(&asoc->strmin[i].inqueue, ctl, next);
 5055                                 sctp_free_remote_addr(ctl->whoFrom);
 5056                                 if (ctl->data) {
 5057                                         sctp_m_freem(ctl->data);
 5058                                         ctl->data = NULL;
 5059                                 }
 5060                                 /*
 5061                                  * We don't free the address here since all
 5062                                  * the net's were freed above.
 5063                                  */
 5064                                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl);
 5065                                 SCTP_DECR_READQ_COUNT();
 5066                         }
 5067                 }
 5068                 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
 5069                 asoc->strmin = NULL;
 5070         }
 5071         asoc->streamincnt = 0;
 5072         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
 5073 #ifdef INVARIANTS
 5074                 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) {
 5075                         panic("no net's left alloc'ed, or list points to itself");
 5076                 }
 5077 #endif
 5078                 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
 5079                 sctp_free_remote_addr(net);
 5080         }
 5081         LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) {
 5082                 /* sa_ignore FREED_MEMORY */
 5083                 sctp_remove_laddr(laddr);
 5084         }
 5085 
 5086         /* pending asconf (address) parameters */
 5087         TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) {
 5088                 /* sa_ignore FREED_MEMORY */
 5089                 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
 5090                 SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
 5091         }
 5092         TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) {
 5093                 /* sa_ignore FREED_MEMORY */
 5094                 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next);
 5095                 if (aack->data != NULL) {
 5096                         sctp_m_freem(aack->data);
 5097                 }
 5098                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack);
 5099         }
 5100         /* clean up auth stuff */
 5101         if (asoc->local_hmacs)
 5102                 sctp_free_hmaclist(asoc->local_hmacs);
 5103         if (asoc->peer_hmacs)
 5104                 sctp_free_hmaclist(asoc->peer_hmacs);
 5105 
 5106         if (asoc->local_auth_chunks)
 5107                 sctp_free_chunklist(asoc->local_auth_chunks);
 5108         if (asoc->peer_auth_chunks)
 5109                 sctp_free_chunklist(asoc->peer_auth_chunks);
 5110 
 5111         sctp_free_authinfo(&asoc->authinfo);
 5112 
 5113         LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) {
 5114                 LIST_REMOVE(shared_key, next);
 5115                 sctp_free_sharedkey(shared_key);
 5116                 /* sa_ignore FREED_MEMORY */
 5117         }
 5118 
 5119         /* Insert new items here :> */
 5120 
 5121         /* Get rid of LOCK */
 5122         SCTP_TCB_LOCK_DESTROY(stcb);
 5123         SCTP_TCB_SEND_LOCK_DESTROY(stcb);
 5124         if (from_inpcbfree == SCTP_NORMAL_PROC) {
 5125                 SCTP_INP_INFO_WUNLOCK();
 5126                 SCTP_INP_RLOCK(inp);
 5127         }
 5128 #ifdef SCTP_TRACK_FREED_ASOCS
 5129         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
 5130                 /* now clean up the tasoc itself */
 5131                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
 5132                 SCTP_DECR_ASOC_COUNT();
 5133         } else {
 5134                 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist);
 5135         }
 5136 #else
 5137         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
 5138         SCTP_DECR_ASOC_COUNT();
 5139 #endif
 5140         if (from_inpcbfree == SCTP_NORMAL_PROC) {
 5141                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
 5142                         /*
 5143                          * If its NOT the inp_free calling us AND sctp_close
 5144                          * as been called, we call back...
 5145                          */
 5146                         SCTP_INP_RUNLOCK(inp);
 5147                         /*
 5148                          * This will start the kill timer (if we are the
 5149                          * last one) since we hold an increment yet. But
 5150                          * this is the only safe way to do this since
 5151                          * otherwise if the socket closes at the same time
 5152                          * we are here we might collide in the cleanup.
 5153                          */
 5154                         sctp_inpcb_free(inp,
 5155                             SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE,
 5156                             SCTP_CALLED_DIRECTLY_NOCMPSET);
 5157                         SCTP_INP_DECR_REF(inp);
 5158                         goto out_of;
 5159                 } else {
 5160                         /* The socket is still open. */
 5161                         SCTP_INP_DECR_REF(inp);
 5162                 }
 5163         }
 5164         if (from_inpcbfree == SCTP_NORMAL_PROC) {
 5165                 SCTP_INP_RUNLOCK(inp);
 5166         }
 5167 out_of:
 5168         /* destroyed the asoc */
 5169 #ifdef SCTP_LOG_CLOSING
 5170         sctp_log_closing(inp, NULL, 11);
 5171 #endif
 5172         return (1);
 5173 }
 5174 
 5175 
 5176 
 5177 /*
 5178  * determine if a destination is "reachable" based upon the addresses bound
 5179  * to the current endpoint (e.g. only v4 or v6 currently bound)
 5180  */
 5181 /*
 5182  * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use
 5183  * assoc level v4/v6 flags, as the assoc *may* not have the same address
 5184  * types bound as its endpoint
 5185  */
 5186 int
 5187 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
 5188 {
 5189         struct sctp_inpcb *inp;
 5190         int answer;
 5191 
 5192         /*
 5193          * No locks here, the TCB, in all cases is already locked and an
 5194          * assoc is up. There is either a INP lock by the caller applied (in
 5195          * asconf case when deleting an address) or NOT in the HB case,
 5196          * however if HB then the INP increment is up and the INP will not
 5197          * be removed (on top of the fact that we have a TCB lock). So we
 5198          * only want to read the sctp_flags, which is either bound-all or
 5199          * not.. no protection needed since once an assoc is up you can't be
 5200          * changing your binding.
 5201          */
 5202         inp = stcb->sctp_ep;
 5203         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
 5204                 /* if bound all, destination is not restricted */
 5205                 /*
 5206                  * RRS: Question during lock work: Is this correct? If you
 5207                  * are bound-all you still might need to obey the V4--V6
 5208                  * flags??? IMO this bound-all stuff needs to be removed!
 5209                  */
 5210                 return (1);
 5211         }
 5212         /* NOTE: all "scope" checks are done when local addresses are added */
 5213         switch (destaddr->sa_family) {
 5214 #ifdef INET6
 5215         case AF_INET6:
 5216                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
 5217                 break;
 5218 #endif
 5219 #ifdef INET
 5220         case AF_INET:
 5221                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
 5222                 break;
 5223 #endif
 5224         default:
 5225                 /* invalid family, so it's unreachable */
 5226                 answer = 0;
 5227                 break;
 5228         }
 5229         return (answer);
 5230 }
 5231 
 5232 /*
 5233  * update the inp_vflags on an endpoint
 5234  */
 5235 static void
 5236 sctp_update_ep_vflag(struct sctp_inpcb *inp)
 5237 {
 5238         struct sctp_laddr *laddr;
 5239 
 5240         /* first clear the flag */
 5241         inp->ip_inp.inp.inp_vflag = 0;
 5242         /* set the flag based on addresses on the ep list */
 5243         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
 5244                 if (laddr->ifa == NULL) {
 5245                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
 5246                             __FUNCTION__);
 5247                         continue;
 5248                 }
 5249                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
 5250                         continue;
 5251                 }
 5252                 switch (laddr->ifa->address.sa.sa_family) {
 5253 #ifdef INET6
 5254                 case AF_INET6:
 5255                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
 5256                         break;
 5257 #endif
 5258 #ifdef INET
 5259                 case AF_INET:
 5260                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
 5261                         break;
 5262 #endif
 5263                 default:
 5264                         break;
 5265                 }
 5266         }
 5267 }
 5268 
 5269 /*
 5270  * Add the address to the endpoint local address list There is nothing to be
 5271  * done if we are bound to all addresses
 5272  */
 5273 void
 5274 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action)
 5275 {
 5276         struct sctp_laddr *laddr;
 5277         int fnd, error = 0;
 5278 
 5279         fnd = 0;
 5280 
 5281         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
 5282                 /* You are already bound to all. You have it already */
 5283                 return;
 5284         }
 5285 #ifdef INET6
 5286         if (ifa->address.sa.sa_family == AF_INET6) {
 5287                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
 5288                         /* Can't bind a non-useable addr. */
 5289                         return;
 5290                 }
 5291         }
 5292 #endif
 5293         /* first, is it already present? */
 5294         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
 5295                 if (laddr->ifa == ifa) {
 5296                         fnd = 1;
 5297                         break;
 5298                 }
 5299         }
 5300 
 5301         if (fnd == 0) {
 5302                 /* Not in the ep list */
 5303                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action);
 5304                 if (error != 0)
 5305                         return;
 5306                 inp->laddr_count++;
 5307                 /* update inp_vflag flags */
 5308                 switch (ifa->address.sa.sa_family) {
 5309 #ifdef INET6
 5310                 case AF_INET6:
 5311                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
 5312                         break;
 5313 #endif
 5314 #ifdef INET
 5315                 case AF_INET:
 5316                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
 5317                         break;
 5318 #endif
 5319                 default:
 5320                         break;
 5321                 }
 5322         }
 5323         return;
 5324 }
 5325 
 5326 
 5327 /*
 5328  * select a new (hopefully reachable) destination net (should only be used
 5329  * when we deleted an ep addr that is the only usable source address to reach
 5330  * the destination net)
 5331  */
 5332 static void
 5333 sctp_select_primary_destination(struct sctp_tcb *stcb)
 5334 {
 5335         struct sctp_nets *net;
 5336 
 5337         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 5338                 /* for now, we'll just pick the first reachable one we find */
 5339                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
 5340                         continue;
 5341                 if (sctp_destination_is_reachable(stcb,
 5342                     (struct sockaddr *)&net->ro._l_addr)) {
 5343                         /* found a reachable destination */
 5344                         stcb->asoc.primary_destination = net;
 5345                 }
 5346         }
 5347         /* I can't there from here! ...we're gonna die shortly... */
 5348 }
 5349 
 5350 
 5351 /*
 5352  * Delete the address from the endpoint local address list There is nothing
 5353  * to be done if we are bound to all addresses
 5354  */
 5355 void
 5356 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
 5357 {
 5358         struct sctp_laddr *laddr;
 5359         int fnd;
 5360 
 5361         fnd = 0;
 5362         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
 5363                 /* You are already bound to all. You have it already */
 5364                 return;
 5365         }
 5366         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
 5367                 if (laddr->ifa == ifa) {
 5368                         fnd = 1;
 5369                         break;
 5370                 }
 5371         }
 5372         if (fnd && (inp->laddr_count < 2)) {
 5373                 /* can't delete unless there are at LEAST 2 addresses */
 5374                 return;
 5375         }
 5376         if (fnd) {
 5377                 /*
 5378                  * clean up any use of this address go through our
 5379                  * associations and clear any last_used_address that match
 5380                  * this one for each assoc, see if a new primary_destination
 5381                  * is needed
 5382                  */
 5383                 struct sctp_tcb *stcb;
 5384 
 5385                 /* clean up "next_addr_touse" */
 5386                 if (inp->next_addr_touse == laddr)
 5387                         /* delete this address */
 5388                         inp->next_addr_touse = NULL;
 5389 
 5390                 /* clean up "last_used_address" */
 5391                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
 5392                         struct sctp_nets *net;
 5393 
 5394                         SCTP_TCB_LOCK(stcb);
 5395                         if (stcb->asoc.last_used_address == laddr)
 5396                                 /* delete this address */
 5397                                 stcb->asoc.last_used_address = NULL;
 5398                         /*
 5399                          * Now spin through all the nets and purge any ref
 5400                          * to laddr
 5401                          */
 5402                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 5403                                 if (net->ro._s_addr &&
 5404                                     (net->ro._s_addr->ifa == laddr->ifa)) {
 5405                                         /* Yep, purge src address selected */
 5406                                         sctp_rtentry_t *rt;
 5407 
 5408                                         /* delete this address if cached */
 5409                                         rt = net->ro.ro_rt;
 5410                                         if (rt != NULL) {
 5411                                                 RTFREE(rt);
 5412                                                 net->ro.ro_rt = NULL;
 5413                                         }
 5414                                         sctp_free_ifa(net->ro._s_addr);
 5415                                         net->ro._s_addr = NULL;
 5416                                         net->src_addr_selected = 0;
 5417                                 }
 5418                         }
 5419                         SCTP_TCB_UNLOCK(stcb);
 5420                 }               /* for each tcb */
 5421                 /* remove it from the ep list */
 5422                 sctp_remove_laddr(laddr);
 5423                 inp->laddr_count--;
 5424                 /* update inp_vflag flags */
 5425                 sctp_update_ep_vflag(inp);
 5426         }
 5427         return;
 5428 }
 5429 
 5430 /*
 5431  * Add the address to the TCB local address restricted list.
 5432  * This is a "pending" address list (eg. addresses waiting for an
 5433  * ASCONF-ACK response) and cannot be used as a valid source address.
 5434  */
 5435 void
 5436 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
 5437 {
 5438         struct sctp_laddr *laddr;
 5439         struct sctpladdr *list;
 5440 
 5441         /*
 5442          * Assumes TCB is locked.. and possibly the INP. May need to
 5443          * confirm/fix that if we need it and is not the case.
 5444          */
 5445         list = &stcb->asoc.sctp_restricted_addrs;
 5446 
 5447 #ifdef INET6
 5448         if (ifa->address.sa.sa_family == AF_INET6) {
 5449                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
 5450                         /* Can't bind a non-existent addr. */
 5451                         return;
 5452                 }
 5453         }
 5454 #endif
 5455         /* does the address already exist? */
 5456         LIST_FOREACH(laddr, list, sctp_nxt_addr) {
 5457                 if (laddr->ifa == ifa) {
 5458                         return;
 5459                 }
 5460         }
 5461 
 5462         /* add to the list */
 5463         (void)sctp_insert_laddr(list, ifa, 0);
 5464         return;
 5465 }
 5466 
 5467 /*
 5468  * insert an laddr entry with the given ifa for the desired list
 5469  */
 5470 int
 5471 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act)
 5472 {
 5473         struct sctp_laddr *laddr;
 5474 
 5475         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
 5476         if (laddr == NULL) {
 5477                 /* out of memory? */
 5478                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
 5479                 return (EINVAL);
 5480         }
 5481         SCTP_INCR_LADDR_COUNT();
 5482         bzero(laddr, sizeof(*laddr));
 5483         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
 5484         laddr->ifa = ifa;
 5485         laddr->action = act;
 5486         atomic_add_int(&ifa->refcount, 1);
 5487         /* insert it */
 5488         LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
 5489 
 5490         return (0);
 5491 }
 5492 
 5493 /*
 5494  * Remove an laddr entry from the local address list (on an assoc)
 5495  */
 5496 void
 5497 sctp_remove_laddr(struct sctp_laddr *laddr)
 5498 {
 5499 
 5500         /* remove from the list */
 5501         LIST_REMOVE(laddr, sctp_nxt_addr);
 5502         sctp_free_ifa(laddr->ifa);
 5503         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr);
 5504         SCTP_DECR_LADDR_COUNT();
 5505 }
 5506 
 5507 /*
 5508  * Remove a local address from the TCB local address restricted list
 5509  */
 5510 void
 5511 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
 5512 {
 5513         struct sctp_inpcb *inp;
 5514         struct sctp_laddr *laddr;
 5515 
 5516         /*
 5517          * This is called by asconf work. It is assumed that a) The TCB is
 5518          * locked and b) The INP is locked. This is true in as much as I can
 5519          * trace through the entry asconf code where I did these locks.
 5520          * Again, the ASCONF code is a bit different in that it does lock
 5521          * the INP during its work often times. This must be since we don't
 5522          * want other proc's looking up things while what they are looking
 5523          * up is changing :-D
 5524          */
 5525 
 5526         inp = stcb->sctp_ep;
 5527         /* if subset bound and don't allow ASCONF's, can't delete last */
 5528         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
 5529             sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
 5530                 if (stcb->sctp_ep->laddr_count < 2) {
 5531                         /* can't delete last address */
 5532                         return;
 5533                 }
 5534         }
 5535         LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
 5536                 /* remove the address if it exists */
 5537                 if (laddr->ifa == NULL)
 5538                         continue;
 5539                 if (laddr->ifa == ifa) {
 5540                         sctp_remove_laddr(laddr);
 5541                         return;
 5542                 }
 5543         }
 5544 
 5545         /* address not found! */
 5546         return;
 5547 }
 5548 
 5549 /*
 5550  * Temporarily remove for __APPLE__ until we use the Tiger equivalents
 5551  */
 5552 /* sysctl */
 5553 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
 5554 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
 5555 
 5556 
 5557 
 5558 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
 5559 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL;
 5560 int *sctp_cpuarry = NULL;
 5561 void
 5562 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use)
 5563 {
 5564         /* Queue a packet to a processor for the specified core */
 5565         struct sctp_mcore_queue *qent;
 5566         struct sctp_mcore_ctrl *wkq;
 5567         int need_wake = 0;
 5568 
 5569         if (sctp_mcore_workers == NULL) {
 5570                 /* Something went way bad during setup */
 5571                 sctp_input_with_port(m, off, 0);
 5572                 return;
 5573         }
 5574         SCTP_MALLOC(qent, struct sctp_mcore_queue *,
 5575             (sizeof(struct sctp_mcore_queue)),
 5576             SCTP_M_MCORE);
 5577         if (qent == NULL) {
 5578                 /* This is trouble  */
 5579                 sctp_input_with_port(m, off, 0);
 5580                 return;
 5581         }
 5582         qent->vn = curvnet;
 5583         qent->m = m;
 5584         qent->off = off;
 5585         qent->v6 = 0;
 5586         wkq = &sctp_mcore_workers[cpu_to_use];
 5587         SCTP_MCORE_QLOCK(wkq);
 5588 
 5589         TAILQ_INSERT_TAIL(&wkq->que, qent, next);
 5590         if (wkq->running == 0) {
 5591                 need_wake = 1;
 5592         }
 5593         SCTP_MCORE_QUNLOCK(wkq);
 5594         if (need_wake) {
 5595                 wakeup(&wkq->running);
 5596         }
 5597 }
 5598 
 5599 static void
 5600 sctp_mcore_thread(void *arg)
 5601 {
 5602 
 5603         struct sctp_mcore_ctrl *wkq;
 5604         struct sctp_mcore_queue *qent;
 5605 
 5606         wkq = (struct sctp_mcore_ctrl *)arg;
 5607         struct mbuf *m;
 5608         int off, v6;
 5609 
 5610         /* Wait for first tickle */
 5611         SCTP_MCORE_LOCK(wkq);
 5612         wkq->running = 0;
 5613         msleep(&wkq->running,
 5614             &wkq->core_mtx,
 5615             0, "wait for pkt", 0);
 5616         SCTP_MCORE_UNLOCK(wkq);
 5617 
 5618         /* Bind to our cpu */
 5619         thread_lock(curthread);
 5620         sched_bind(curthread, wkq->cpuid);
 5621         thread_unlock(curthread);
 5622 
 5623         /* Now lets start working */
 5624         SCTP_MCORE_LOCK(wkq);
 5625         /* Now grab lock and go */
 5626         for (;;) {
 5627                 SCTP_MCORE_QLOCK(wkq);
 5628 skip_sleep:
 5629                 wkq->running = 1;
 5630                 qent = TAILQ_FIRST(&wkq->que);
 5631                 if (qent) {
 5632                         TAILQ_REMOVE(&wkq->que, qent, next);
 5633                         SCTP_MCORE_QUNLOCK(wkq);
 5634                         CURVNET_SET(qent->vn);
 5635                         m = qent->m;
 5636                         off = qent->off;
 5637                         v6 = qent->v6;
 5638                         SCTP_FREE(qent, SCTP_M_MCORE);
 5639                         if (v6 == 0) {
 5640                                 sctp_input_with_port(m, off, 0);
 5641                         } else {
 5642                                 SCTP_PRINTF("V6 not yet supported\n");
 5643                                 sctp_m_freem(m);
 5644                         }
 5645                         CURVNET_RESTORE();
 5646                         SCTP_MCORE_QLOCK(wkq);
 5647                 }
 5648                 wkq->running = 0;
 5649                 if (!TAILQ_EMPTY(&wkq->que)) {
 5650                         goto skip_sleep;
 5651                 }
 5652                 SCTP_MCORE_QUNLOCK(wkq);
 5653                 msleep(&wkq->running,
 5654                     &wkq->core_mtx,
 5655                     0, "wait for pkt", 0);
 5656         }
 5657 }
 5658 
 5659 static void
 5660 sctp_startup_mcore_threads(void)
 5661 {
 5662         int i, cpu;
 5663 
 5664         if (mp_ncpus == 1)
 5665                 return;
 5666 
 5667         if (sctp_mcore_workers != NULL) {
 5668                 /*
 5669                  * Already been here in some previous vnet?
 5670                  */
 5671                 return;
 5672         }
 5673         SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *,
 5674             ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)),
 5675             SCTP_M_MCORE);
 5676         if (sctp_mcore_workers == NULL) {
 5677                 /* TSNH I hope */
 5678                 return;
 5679         }
 5680         memset(sctp_mcore_workers, 0, ((mp_maxid + 1) *
 5681             sizeof(struct sctp_mcore_ctrl)));
 5682         /* Init the structures */
 5683         for (i = 0; i <= mp_maxid; i++) {
 5684                 TAILQ_INIT(&sctp_mcore_workers[i].que);
 5685                 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]);
 5686                 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]);
 5687                 sctp_mcore_workers[i].cpuid = i;
 5688         }
 5689         if (sctp_cpuarry == NULL) {
 5690                 SCTP_MALLOC(sctp_cpuarry, int *,
 5691                     (mp_ncpus * sizeof(int)),
 5692                     SCTP_M_MCORE);
 5693                 i = 0;
 5694                 CPU_FOREACH(cpu) {
 5695                         sctp_cpuarry[i] = cpu;
 5696                         i++;
 5697                 }
 5698         }
 5699         /* Now start them all */
 5700         CPU_FOREACH(cpu) {
 5701                 (void)kproc_create(sctp_mcore_thread,
 5702                     (void *)&sctp_mcore_workers[cpu],
 5703                     &sctp_mcore_workers[cpu].thread_proc,
 5704                     RFPROC,
 5705                     SCTP_KTHREAD_PAGES,
 5706                     SCTP_MCORE_NAME);
 5707 
 5708         }
 5709 }
 5710 
 5711 #endif
 5712 
 5713 void
 5714 sctp_pcb_init()
 5715 {
 5716         /*
 5717          * SCTP initialization for the PCB structures should be called by
 5718          * the sctp_init() funciton.
 5719          */
 5720         int i;
 5721         struct timeval tv;
 5722 
 5723         if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) {
 5724                 /* error I was called twice */
 5725                 return;
 5726         }
 5727         SCTP_BASE_VAR(sctp_pcb_initialized) = 1;
 5728 
 5729 #if defined(SCTP_LOCAL_TRACE_BUF)
 5730         bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log));
 5731 #endif
 5732 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
 5733         SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *,
 5734             ((mp_maxid + 1) * sizeof(struct sctpstat)),
 5735             SCTP_M_MCORE);
 5736 #endif
 5737         (void)SCTP_GETTIME_TIMEVAL(&tv);
 5738 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
 5739         bzero(SCTP_BASE_STATS, (sizeof(struct sctpstat) * (mp_maxid + 1)));
 5740         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t) tv.tv_sec;
 5741         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t) tv.tv_usec;
 5742 #else
 5743         bzero(&SCTP_BASE_STATS, sizeof(struct sctpstat));
 5744         SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t) tv.tv_sec;
 5745         SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t) tv.tv_usec;
 5746 #endif
 5747         /* init the empty list of (All) Endpoints */
 5748         LIST_INIT(&SCTP_BASE_INFO(listhead));
 5749 
 5750 
 5751         /* init the hash table of endpoints */
 5752         TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize));
 5753         TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize));
 5754         TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale));
 5755         SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31),
 5756             &SCTP_BASE_INFO(hashasocmark));
 5757         SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
 5758             &SCTP_BASE_INFO(hashmark));
 5759         SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
 5760             &SCTP_BASE_INFO(hashtcpmark));
 5761         SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize);
 5762 
 5763 
 5764         SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH,
 5765             &SCTP_BASE_INFO(hashvrfmark));
 5766 
 5767         SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE,
 5768             &SCTP_BASE_INFO(vrf_ifn_hashmark));
 5769         /* init the zones */
 5770         /*
 5771          * FIX ME: Should check for NULL returns, but if it does fail we are
 5772          * doomed to panic anyways... add later maybe.
 5773          */
 5774         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep",
 5775             sizeof(struct sctp_inpcb), maxsockets);
 5776 
 5777         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc",
 5778             sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
 5779 
 5780         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr",
 5781             sizeof(struct sctp_laddr),
 5782             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
 5783 
 5784         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr",
 5785             sizeof(struct sctp_nets),
 5786             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
 5787 
 5788         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk",
 5789             sizeof(struct sctp_tmit_chunk),
 5790             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
 5791 
 5792         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq",
 5793             sizeof(struct sctp_queued_to_read),
 5794             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
 5795 
 5796         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out",
 5797             sizeof(struct sctp_stream_queue_pending),
 5798             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
 5799 
 5800         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf",
 5801             sizeof(struct sctp_asconf),
 5802             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
 5803 
 5804         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack",
 5805             sizeof(struct sctp_asconf_ack),
 5806             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
 5807 
 5808 
 5809         /* Master Lock INIT for info structure */
 5810         SCTP_INP_INFO_LOCK_INIT();
 5811         SCTP_STATLOG_INIT_LOCK();
 5812 
 5813         SCTP_IPI_COUNT_INIT();
 5814         SCTP_IPI_ADDR_INIT();
 5815 #ifdef SCTP_PACKET_LOGGING
 5816         SCTP_IP_PKTLOG_INIT();
 5817 #endif
 5818         LIST_INIT(&SCTP_BASE_INFO(addr_wq));
 5819 
 5820         SCTP_WQ_ADDR_INIT();
 5821         /* not sure if we need all the counts */
 5822         SCTP_BASE_INFO(ipi_count_ep) = 0;
 5823         /* assoc/tcb zone info */
 5824         SCTP_BASE_INFO(ipi_count_asoc) = 0;
 5825         /* local addrlist zone info */
 5826         SCTP_BASE_INFO(ipi_count_laddr) = 0;
 5827         /* remote addrlist zone info */
 5828         SCTP_BASE_INFO(ipi_count_raddr) = 0;
 5829         /* chunk info */
 5830         SCTP_BASE_INFO(ipi_count_chunk) = 0;
 5831 
 5832         /* socket queue zone info */
 5833         SCTP_BASE_INFO(ipi_count_readq) = 0;
 5834 
 5835         /* stream out queue cont */
 5836         SCTP_BASE_INFO(ipi_count_strmoq) = 0;
 5837 
 5838         SCTP_BASE_INFO(ipi_free_strmoq) = 0;
 5839         SCTP_BASE_INFO(ipi_free_chunks) = 0;
 5840 
 5841         SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer));
 5842 
 5843         /* Init the TIMEWAIT list */
 5844         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
 5845                 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]);
 5846         }
 5847 
 5848         sctp_startup_iterator();
 5849 
 5850 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
 5851         sctp_startup_mcore_threads();
 5852 #endif
 5853 
 5854         /*
 5855          * INIT the default VRF which for BSD is the only one, other O/S's
 5856          * may have more. But initially they must start with one and then
 5857          * add the VRF's as addresses are added.
 5858          */
 5859         sctp_init_vrf_list(SCTP_DEFAULT_VRF);
 5860 }
 5861 
 5862 /*
 5863  * Assumes that the SCTP_BASE_INFO() lock is NOT held.
 5864  */
 5865 void
 5866 sctp_pcb_finish(void)
 5867 {
 5868         struct sctp_vrflist *vrf_bucket;
 5869         struct sctp_vrf *vrf, *nvrf;
 5870         struct sctp_ifn *ifn, *nifn;
 5871         struct sctp_ifa *ifa, *nifa;
 5872         struct sctpvtaghead *chain;
 5873         struct sctp_tagblock *twait_block, *prev_twait_block;
 5874         struct sctp_laddr *wi, *nwi;
 5875         int i;
 5876 
 5877         /*
 5878          * Free BSD the it thread never exits but we do clean up. The only
 5879          * way freebsd reaches here if we have VRF's but we still add the
 5880          * ifdef to make it compile on old versions.
 5881          */
 5882         {
 5883                 struct sctp_iterator *it, *nit;
 5884 
 5885                 SCTP_IPI_ITERATOR_WQ_LOCK();
 5886                 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
 5887                         if (it->vn != curvnet) {
 5888                                 continue;
 5889                         }
 5890                         TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
 5891                         if (it->function_atend != NULL) {
 5892                                 (*it->function_atend) (it->pointer, it->val);
 5893                         }
 5894                         SCTP_FREE(it, SCTP_M_ITER);
 5895                 }
 5896                 SCTP_IPI_ITERATOR_WQ_UNLOCK();
 5897                 SCTP_ITERATOR_LOCK();
 5898                 if ((sctp_it_ctl.cur_it) &&
 5899                     (sctp_it_ctl.cur_it->vn == curvnet)) {
 5900                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
 5901                 }
 5902                 SCTP_ITERATOR_UNLOCK();
 5903         }
 5904 
 5905         SCTP_OS_TIMER_STOP(&SCTP_BASE_INFO(addr_wq_timer.timer));
 5906         SCTP_WQ_ADDR_LOCK();
 5907         LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) {
 5908                 LIST_REMOVE(wi, sctp_nxt_addr);
 5909                 SCTP_DECR_LADDR_COUNT();
 5910                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi);
 5911         }
 5912         SCTP_WQ_ADDR_UNLOCK();
 5913 
 5914         /*
 5915          * free the vrf/ifn/ifa lists and hashes (be sure address monitor is
 5916          * destroyed first).
 5917          */
 5918         vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))];
 5919         LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) {
 5920                 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) {
 5921                         LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) {
 5922                                 /* free the ifa */
 5923                                 LIST_REMOVE(ifa, next_bucket);
 5924                                 LIST_REMOVE(ifa, next_ifa);
 5925                                 SCTP_FREE(ifa, SCTP_M_IFA);
 5926                         }
 5927                         /* free the ifn */
 5928                         LIST_REMOVE(ifn, next_bucket);
 5929                         LIST_REMOVE(ifn, next_ifn);
 5930                         SCTP_FREE(ifn, SCTP_M_IFN);
 5931                 }
 5932                 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
 5933                 /* free the vrf */
 5934                 LIST_REMOVE(vrf, next_vrf);
 5935                 SCTP_FREE(vrf, SCTP_M_VRF);
 5936         }
 5937         /* free the vrf hashes */
 5938         SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark));
 5939         SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark));
 5940 
 5941         /*
 5942          * free the TIMEWAIT list elements malloc'd in the function
 5943          * sctp_add_vtag_to_timewait()...
 5944          */
 5945         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
 5946                 chain = &SCTP_BASE_INFO(vtag_timewait)[i];
 5947                 if (!LIST_EMPTY(chain)) {
 5948                         prev_twait_block = NULL;
 5949                         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
 5950                                 if (prev_twait_block) {
 5951                                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
 5952                                 }
 5953                                 prev_twait_block = twait_block;
 5954                         }
 5955                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
 5956                 }
 5957         }
 5958 
 5959         /* free the locks and mutexes */
 5960 #ifdef SCTP_PACKET_LOGGING
 5961         SCTP_IP_PKTLOG_DESTROY();
 5962 #endif
 5963         SCTP_IPI_ADDR_DESTROY();
 5964         SCTP_STATLOG_DESTROY();
 5965         SCTP_INP_INFO_LOCK_DESTROY();
 5966 
 5967         SCTP_WQ_ADDR_DESTROY();
 5968 
 5969         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep));
 5970         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc));
 5971         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr));
 5972         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net));
 5973         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk));
 5974         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq));
 5975         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq));
 5976         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf));
 5977         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack));
 5978         /* Get rid of other stuff to */
 5979         if (SCTP_BASE_INFO(sctp_asochash) != NULL)
 5980                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark));
 5981         if (SCTP_BASE_INFO(sctp_ephash) != NULL)
 5982                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark));
 5983         if (SCTP_BASE_INFO(sctp_tcpephash) != NULL)
 5984                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark));
 5985 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
 5986         SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE);
 5987 #endif
 5988 }
 5989 
 5990 
 5991 int
 5992 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
 5993     int offset, int limit,
 5994     struct sockaddr *src, struct sockaddr *dst,
 5995     struct sockaddr *altsa)
 5996 {
 5997         /*
 5998          * grub through the INIT pulling addresses and loading them to the
 5999          * nets structure in the asoc. The from address in the mbuf should
 6000          * also be loaded (if it is not already). This routine can be called
 6001          * with either INIT or INIT-ACK's as long as the m points to the IP
 6002          * packet and the offset points to the beginning of the parameters.
 6003          */
 6004         struct sctp_inpcb *inp;
 6005         struct sctp_nets *net, *nnet, *net_tmp;
 6006         struct sctp_paramhdr *phdr, parm_buf;
 6007         struct sctp_tcb *stcb_tmp;
 6008         uint16_t ptype, plen;
 6009         struct sockaddr *sa;
 6010         uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
 6011         struct sctp_auth_random *p_random = NULL;
 6012         uint16_t random_len = 0;
 6013         uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE];
 6014         struct sctp_auth_hmac_algo *hmacs = NULL;
 6015         uint16_t hmacs_len = 0;
 6016         uint8_t saw_asconf = 0;
 6017         uint8_t saw_asconf_ack = 0;
 6018         uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE];
 6019         struct sctp_auth_chunk_list *chunks = NULL;
 6020         uint16_t num_chunks = 0;
 6021         sctp_key_t *new_key;
 6022         uint32_t keylen;
 6023         int got_random = 0, got_hmacs = 0, got_chklist = 0;
 6024         uint8_t ecn_allowed;
 6025 
 6026 #ifdef INET
 6027         struct sockaddr_in sin;
 6028 
 6029 #endif
 6030 #ifdef INET6
 6031         struct sockaddr_in6 sin6;
 6032 
 6033 #endif
 6034 
 6035         /* First get the destination address setup too. */
 6036 #ifdef INET
 6037         memset(&sin, 0, sizeof(sin));
 6038         sin.sin_family = AF_INET;
 6039         sin.sin_len = sizeof(sin);
 6040         sin.sin_port = stcb->rport;
 6041 #endif
 6042 #ifdef INET6
 6043         memset(&sin6, 0, sizeof(sin6));
 6044         sin6.sin6_family = AF_INET6;
 6045         sin6.sin6_len = sizeof(struct sockaddr_in6);
 6046         sin6.sin6_port = stcb->rport;
 6047 #endif
 6048         if (altsa) {
 6049                 sa = altsa;
 6050         } else {
 6051                 sa = src;
 6052         }
 6053         /* Turn off ECN until we get through all params */
 6054         ecn_allowed = 0;
 6055         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 6056                 /* mark all addresses that we have currently on the list */
 6057                 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
 6058         }
 6059         /* does the source address already exist? if so skip it */
 6060         inp = stcb->sctp_ep;
 6061         atomic_add_int(&stcb->asoc.refcnt, 1);
 6062         stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb);
 6063         atomic_add_int(&stcb->asoc.refcnt, -1);
 6064 
 6065         if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
 6066                 /* we must add the source address */
 6067                 /* no scope set here since we have a tcb already. */
 6068                 switch (sa->sa_family) {
 6069 #ifdef INET
 6070                 case AF_INET:
 6071                         if (stcb->asoc.scope.ipv4_addr_legal) {
 6072                                 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) {
 6073                                         return (-1);
 6074                                 }
 6075                         }
 6076                         break;
 6077 #endif
 6078 #ifdef INET6
 6079                 case AF_INET6:
 6080                         if (stcb->asoc.scope.ipv6_addr_legal) {
 6081                                 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
 6082                                         return (-2);
 6083                                 }
 6084                         }
 6085                         break;
 6086 #endif
 6087                 default:
 6088                         break;
 6089                 }
 6090         } else {
 6091                 if (net_tmp != NULL && stcb_tmp == stcb) {
 6092                         net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
 6093                 } else if (stcb_tmp != stcb) {
 6094                         /* It belongs to another association? */
 6095                         if (stcb_tmp)
 6096                                 SCTP_TCB_UNLOCK(stcb_tmp);
 6097                         return (-3);
 6098                 }
 6099         }
 6100         if (stcb->asoc.state == 0) {
 6101                 /* the assoc was freed? */
 6102                 return (-4);
 6103         }
 6104         /*
 6105          * peer must explicitly turn this on. This may have been initialized
 6106          * to be "on" in order to allow local addr changes while INIT's are
 6107          * in flight.
 6108          */
 6109         stcb->asoc.peer_supports_asconf = 0;
 6110         /* now we must go through each of the params. */
 6111         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
 6112         while (phdr) {
 6113                 ptype = ntohs(phdr->param_type);
 6114                 plen = ntohs(phdr->param_length);
 6115                 /*
 6116                  * SCTP_PRINTF("ptype => %0x, plen => %d\n",
 6117                  * (uint32_t)ptype, (int)plen);
 6118                  */
 6119                 if (offset + plen > limit) {
 6120                         break;
 6121                 }
 6122                 if (plen == 0) {
 6123                         break;
 6124                 }
 6125 #ifdef INET
 6126                 if (ptype == SCTP_IPV4_ADDRESS) {
 6127                         if (stcb->asoc.scope.ipv4_addr_legal) {
 6128                                 struct sctp_ipv4addr_param *p4, p4_buf;
 6129 
 6130                                 /* ok get the v4 address and check/add */
 6131                                 phdr = sctp_get_next_param(m, offset,
 6132                                     (struct sctp_paramhdr *)&p4_buf,
 6133                                     sizeof(p4_buf));
 6134                                 if (plen != sizeof(struct sctp_ipv4addr_param) ||
 6135                                     phdr == NULL) {
 6136                                         return (-5);
 6137                                 }
 6138                                 p4 = (struct sctp_ipv4addr_param *)phdr;
 6139                                 sin.sin_addr.s_addr = p4->addr;
 6140                                 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
 6141                                         /* Skip multi-cast addresses */
 6142                                         goto next_param;
 6143                                 }
 6144                                 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) ||
 6145                                     (sin.sin_addr.s_addr == INADDR_ANY)) {
 6146                                         goto next_param;
 6147                                 }
 6148                                 sa = (struct sockaddr *)&sin;
 6149                                 inp = stcb->sctp_ep;
 6150                                 atomic_add_int(&stcb->asoc.refcnt, 1);
 6151                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
 6152                                     dst, stcb);
 6153                                 atomic_add_int(&stcb->asoc.refcnt, -1);
 6154 
 6155                                 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) ||
 6156                                     inp == NULL) {
 6157                                         /* we must add the source address */
 6158                                         /*
 6159                                          * no scope set since we have a tcb
 6160                                          * already
 6161                                          */
 6162 
 6163                                         /*
 6164                                          * we must validate the state again
 6165                                          * here
 6166                                          */
 6167                         add_it_now:
 6168                                         if (stcb->asoc.state == 0) {
 6169                                                 /* the assoc was freed? */
 6170                                                 return (-7);
 6171                                         }
 6172                                         if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) {
 6173                                                 return (-8);
 6174                                         }
 6175                                 } else if (stcb_tmp == stcb) {
 6176                                         if (stcb->asoc.state == 0) {
 6177                                                 /* the assoc was freed? */
 6178                                                 return (-10);
 6179                                         }
 6180                                         if (net != NULL) {
 6181                                                 /* clear flag */
 6182                                                 net->dest_state &=
 6183                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
 6184                                         }
 6185                                 } else {
 6186                                         /*
 6187                                          * strange, address is in another
 6188                                          * assoc? straighten out locks.
 6189                                          */
 6190                                         if (stcb_tmp) {
 6191                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
 6192                                                         /*
 6193                                                          * in setup state we
 6194                                                          * abort this guy
 6195                                                          */
 6196                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
 6197                                                             stcb_tmp, NULL, SCTP_SO_NOT_LOCKED);
 6198                                                         goto add_it_now;
 6199                                                 }
 6200                                                 SCTP_TCB_UNLOCK(stcb_tmp);
 6201                                         }
 6202                                         if (stcb->asoc.state == 0) {
 6203                                                 /* the assoc was freed? */
 6204                                                 return (-12);
 6205                                         }
 6206                                         return (-13);
 6207                                 }
 6208                         }
 6209                 } else
 6210 #endif
 6211 #ifdef INET6
 6212                 if (ptype == SCTP_IPV6_ADDRESS) {
 6213                         if (stcb->asoc.scope.ipv6_addr_legal) {
 6214                                 /* ok get the v6 address and check/add */
 6215                                 struct sctp_ipv6addr_param *p6, p6_buf;
 6216 
 6217                                 phdr = sctp_get_next_param(m, offset,
 6218                                     (struct sctp_paramhdr *)&p6_buf,
 6219                                     sizeof(p6_buf));
 6220                                 if (plen != sizeof(struct sctp_ipv6addr_param) ||
 6221                                     phdr == NULL) {
 6222                                         return (-14);
 6223                                 }
 6224                                 p6 = (struct sctp_ipv6addr_param *)phdr;
 6225                                 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
 6226                                     sizeof(p6->addr));
 6227                                 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
 6228                                         /* Skip multi-cast addresses */
 6229                                         goto next_param;
 6230                                 }
 6231                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
 6232                                         /*
 6233                                          * Link local make no sense without
 6234                                          * scope
 6235                                          */
 6236                                         goto next_param;
 6237                                 }
 6238                                 sa = (struct sockaddr *)&sin6;
 6239                                 inp = stcb->sctp_ep;
 6240                                 atomic_add_int(&stcb->asoc.refcnt, 1);
 6241                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
 6242                                     dst, stcb);
 6243                                 atomic_add_int(&stcb->asoc.refcnt, -1);
 6244                                 if (stcb_tmp == NULL &&
 6245                                     (inp == stcb->sctp_ep || inp == NULL)) {
 6246                                         /*
 6247                                          * we must validate the state again
 6248                                          * here
 6249                                          */
 6250                         add_it_now6:
 6251                                         if (stcb->asoc.state == 0) {
 6252                                                 /* the assoc was freed? */
 6253                                                 return (-16);
 6254                                         }
 6255                                         /*
 6256                                          * we must add the address, no scope
 6257                                          * set
 6258                                          */
 6259                                         if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) {
 6260                                                 return (-17);
 6261                                         }
 6262                                 } else if (stcb_tmp == stcb) {
 6263                                         /*
 6264                                          * we must validate the state again
 6265                                          * here
 6266                                          */
 6267                                         if (stcb->asoc.state == 0) {
 6268                                                 /* the assoc was freed? */
 6269                                                 return (-19);
 6270                                         }
 6271                                         if (net != NULL) {
 6272                                                 /* clear flag */
 6273                                                 net->dest_state &=
 6274                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
 6275                                         }
 6276                                 } else {
 6277                                         /*
 6278                                          * strange, address is in another
 6279                                          * assoc? straighten out locks.
 6280                                          */
 6281                                         if (stcb_tmp)
 6282                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
 6283                                                         /*
 6284                                                          * in setup state we
 6285                                                          * abort this guy
 6286                                                          */
 6287                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
 6288                                                             stcb_tmp, NULL, SCTP_SO_NOT_LOCKED);
 6289                                                         goto add_it_now6;
 6290                                                 }
 6291                                         SCTP_TCB_UNLOCK(stcb_tmp);
 6292 
 6293                                         if (stcb->asoc.state == 0) {
 6294                                                 /* the assoc was freed? */
 6295                                                 return (-21);
 6296                                         }
 6297                                         return (-22);
 6298                                 }
 6299                         }
 6300                 } else
 6301 #endif
 6302                 if (ptype == SCTP_ECN_CAPABLE) {
 6303                         ecn_allowed = 1;
 6304                 } else if (ptype == SCTP_ULP_ADAPTATION) {
 6305                         if (stcb->asoc.state != SCTP_STATE_OPEN) {
 6306                                 struct sctp_adaptation_layer_indication ai,
 6307                                                                 *aip;
 6308 
 6309                                 phdr = sctp_get_next_param(m, offset,
 6310                                     (struct sctp_paramhdr *)&ai, sizeof(ai));
 6311                                 aip = (struct sctp_adaptation_layer_indication *)phdr;
 6312                                 if (aip) {
 6313                                         stcb->asoc.peers_adaptation = ntohl(aip->indication);
 6314                                         stcb->asoc.adaptation_needed = 1;
 6315                                 }
 6316                         }
 6317                 } else if (ptype == SCTP_SET_PRIM_ADDR) {
 6318                         struct sctp_asconf_addr_param lstore, *fee;
 6319                         int lptype;
 6320                         struct sockaddr *lsa = NULL;
 6321 
 6322 #ifdef INET
 6323                         struct sctp_asconf_addrv4_param *fii;
 6324 
 6325 #endif
 6326 
 6327                         stcb->asoc.peer_supports_asconf = 1;
 6328                         if (plen > sizeof(lstore)) {
 6329                                 return (-23);
 6330                         }
 6331                         phdr = sctp_get_next_param(m, offset,
 6332                             (struct sctp_paramhdr *)&lstore,
 6333                             min(plen, sizeof(lstore)));
 6334                         if (phdr == NULL) {
 6335                                 return (-24);
 6336                         }
 6337                         fee = (struct sctp_asconf_addr_param *)phdr;
 6338                         lptype = ntohs(fee->addrp.ph.param_type);
 6339                         switch (lptype) {
 6340 #ifdef INET
 6341                         case SCTP_IPV4_ADDRESS:
 6342                                 if (plen !=
 6343                                     sizeof(struct sctp_asconf_addrv4_param)) {
 6344                                         SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n",
 6345                                             (int)sizeof(struct sctp_asconf_addrv4_param),
 6346                                             plen);
 6347                                 } else {
 6348                                         fii = (struct sctp_asconf_addrv4_param *)fee;
 6349                                         sin.sin_addr.s_addr = fii->addrp.addr;
 6350                                         lsa = (struct sockaddr *)&sin;
 6351                                 }
 6352                                 break;
 6353 #endif
 6354 #ifdef INET6
 6355                         case SCTP_IPV6_ADDRESS:
 6356                                 if (plen !=
 6357                                     sizeof(struct sctp_asconf_addr_param)) {
 6358                                         SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
 6359                                             (int)sizeof(struct sctp_asconf_addr_param),
 6360                                             plen);
 6361                                 } else {
 6362                                         memcpy(sin6.sin6_addr.s6_addr,
 6363                                             fee->addrp.addr,
 6364                                             sizeof(fee->addrp.addr));
 6365                                         lsa = (struct sockaddr *)&sin6;
 6366                                 }
 6367                                 break;
 6368 #endif
 6369                         default:
 6370                                 break;
 6371                         }
 6372                         if (lsa) {
 6373                                 (void)sctp_set_primary_addr(stcb, sa, NULL);
 6374                         }
 6375                 } else if (ptype == SCTP_HAS_NAT_SUPPORT) {
 6376                         stcb->asoc.peer_supports_nat = 1;
 6377                 } else if (ptype == SCTP_PRSCTP_SUPPORTED) {
 6378                         /* Peer supports pr-sctp */
 6379                         stcb->asoc.peer_supports_prsctp = 1;
 6380                 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
 6381                         /* A supported extension chunk */
 6382                         struct sctp_supported_chunk_types_param *pr_supported;
 6383                         uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
 6384                         int num_ent, i;
 6385 
 6386                         phdr = sctp_get_next_param(m, offset,
 6387                             (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen));
 6388                         if (phdr == NULL) {
 6389                                 return (-25);
 6390                         }
 6391                         stcb->asoc.peer_supports_asconf = 0;
 6392                         stcb->asoc.peer_supports_prsctp = 0;
 6393                         stcb->asoc.peer_supports_pktdrop = 0;
 6394                         stcb->asoc.peer_supports_strreset = 0;
 6395                         stcb->asoc.peer_supports_nr_sack = 0;
 6396                         stcb->asoc.peer_supports_auth = 0;
 6397                         pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
 6398                         num_ent = plen - sizeof(struct sctp_paramhdr);
 6399                         for (i = 0; i < num_ent; i++) {
 6400                                 switch (pr_supported->chunk_types[i]) {
 6401                                 case SCTP_ASCONF:
 6402                                 case SCTP_ASCONF_ACK:
 6403                                         stcb->asoc.peer_supports_asconf = 1;
 6404                                         break;
 6405                                 case SCTP_FORWARD_CUM_TSN:
 6406                                         stcb->asoc.peer_supports_prsctp = 1;
 6407                                         break;
 6408                                 case SCTP_PACKET_DROPPED:
 6409                                         stcb->asoc.peer_supports_pktdrop = 1;
 6410                                         break;
 6411                                 case SCTP_NR_SELECTIVE_ACK:
 6412                                         stcb->asoc.peer_supports_nr_sack = 1;
 6413                                         break;
 6414                                 case SCTP_STREAM_RESET:
 6415                                         stcb->asoc.peer_supports_strreset = 1;
 6416                                         break;
 6417                                 case SCTP_AUTHENTICATION:
 6418                                         stcb->asoc.peer_supports_auth = 1;
 6419                                         break;
 6420                                 default:
 6421                                         /* one I have not learned yet */
 6422                                         break;
 6423 
 6424                                 }
 6425                         }
 6426                 } else if (ptype == SCTP_RANDOM) {
 6427                         if (plen > sizeof(random_store))
 6428                                 break;
 6429                         if (got_random) {
 6430                                 /* already processed a RANDOM */
 6431                                 goto next_param;
 6432                         }
 6433                         phdr = sctp_get_next_param(m, offset,
 6434                             (struct sctp_paramhdr *)random_store,
 6435                             min(sizeof(random_store), plen));
 6436                         if (phdr == NULL)
 6437                                 return (-26);
 6438                         p_random = (struct sctp_auth_random *)phdr;
 6439                         random_len = plen - sizeof(*p_random);
 6440                         /* enforce the random length */
 6441                         if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) {
 6442                                 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n");
 6443                                 return (-27);
 6444                         }
 6445                         got_random = 1;
 6446                 } else if (ptype == SCTP_HMAC_LIST) {
 6447                         int num_hmacs;
 6448                         int i;
 6449 
 6450                         if (plen > sizeof(hmacs_store))
 6451                                 break;
 6452                         if (got_hmacs) {
 6453                                 /* already processed a HMAC list */
 6454                                 goto next_param;
 6455                         }
 6456                         phdr = sctp_get_next_param(m, offset,
 6457                             (struct sctp_paramhdr *)hmacs_store,
 6458                             min(plen, sizeof(hmacs_store)));
 6459                         if (phdr == NULL)
 6460                                 return (-28);
 6461                         hmacs = (struct sctp_auth_hmac_algo *)phdr;
 6462                         hmacs_len = plen - sizeof(*hmacs);
 6463                         num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
 6464                         /* validate the hmac list */
 6465                         if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
 6466                                 return (-29);
 6467                         }
 6468                         if (stcb->asoc.peer_hmacs != NULL)
 6469                                 sctp_free_hmaclist(stcb->asoc.peer_hmacs);
 6470                         stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs);
 6471                         if (stcb->asoc.peer_hmacs != NULL) {
 6472                                 for (i = 0; i < num_hmacs; i++) {
 6473                                         (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs,
 6474                                             ntohs(hmacs->hmac_ids[i]));
 6475                                 }
 6476                         }
 6477                         got_hmacs = 1;
 6478                 } else if (ptype == SCTP_CHUNK_LIST) {
 6479                         int i;
 6480 
 6481                         if (plen > sizeof(chunks_store))
 6482                                 break;
 6483                         if (got_chklist) {
 6484                                 /* already processed a Chunks list */
 6485                                 goto next_param;
 6486                         }
 6487                         phdr = sctp_get_next_param(m, offset,
 6488                             (struct sctp_paramhdr *)chunks_store,
 6489                             min(plen, sizeof(chunks_store)));
 6490                         if (phdr == NULL)
 6491                                 return (-30);
 6492                         chunks = (struct sctp_auth_chunk_list *)phdr;
 6493                         num_chunks = plen - sizeof(*chunks);
 6494                         if (stcb->asoc.peer_auth_chunks != NULL)
 6495                                 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks);
 6496                         else
 6497                                 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist();
 6498                         for (i = 0; i < num_chunks; i++) {
 6499                                 (void)sctp_auth_add_chunk(chunks->chunk_types[i],
 6500                                     stcb->asoc.peer_auth_chunks);
 6501                                 /* record asconf/asconf-ack if listed */
 6502                                 if (chunks->chunk_types[i] == SCTP_ASCONF)
 6503                                         saw_asconf = 1;
 6504                                 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK)
 6505                                         saw_asconf_ack = 1;
 6506 
 6507                         }
 6508                         got_chklist = 1;
 6509                 } else if ((ptype == SCTP_HEARTBEAT_INFO) ||
 6510                             (ptype == SCTP_STATE_COOKIE) ||
 6511                             (ptype == SCTP_UNRECOG_PARAM) ||
 6512                             (ptype == SCTP_COOKIE_PRESERVE) ||
 6513                             (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
 6514                             (ptype == SCTP_ADD_IP_ADDRESS) ||
 6515                             (ptype == SCTP_DEL_IP_ADDRESS) ||
 6516                             (ptype == SCTP_ERROR_CAUSE_IND) ||
 6517                     (ptype == SCTP_SUCCESS_REPORT)) {
 6518                          /* don't care */ ;
 6519                 } else {
 6520                         if ((ptype & 0x8000) == 0x0000) {
 6521                                 /*
 6522                                  * must stop processing the rest of the
 6523                                  * param's. Any report bits were handled
 6524                                  * with the call to
 6525                                  * sctp_arethere_unrecognized_parameters()
 6526                                  * when the INIT or INIT-ACK was first seen.
 6527                                  */
 6528                                 break;
 6529                         }
 6530                 }
 6531 
 6532 next_param:
 6533                 offset += SCTP_SIZE32(plen);
 6534                 if (offset >= limit) {
 6535                         break;
 6536                 }
 6537                 phdr = sctp_get_next_param(m, offset, &parm_buf,
 6538                     sizeof(parm_buf));
 6539         }
 6540         /* Now check to see if we need to purge any addresses */
 6541         TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) {
 6542                 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
 6543                     SCTP_ADDR_NOT_IN_ASSOC) {
 6544                         /* This address has been removed from the asoc */
 6545                         /* remove and free it */
 6546                         stcb->asoc.numnets--;
 6547                         TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
 6548                         sctp_free_remote_addr(net);
 6549                         if (net == stcb->asoc.primary_destination) {
 6550                                 stcb->asoc.primary_destination = NULL;
 6551                                 sctp_select_primary_destination(stcb);
 6552                         }
 6553                 }
 6554         }
 6555         if (ecn_allowed == 0) {
 6556                 stcb->asoc.ecn_allowed = 0;
 6557         }
 6558         /* validate authentication required parameters */
 6559         if (got_random && got_hmacs) {
 6560                 stcb->asoc.peer_supports_auth = 1;
 6561         } else {
 6562                 stcb->asoc.peer_supports_auth = 0;
 6563         }
 6564         if (!stcb->asoc.peer_supports_auth && got_chklist) {
 6565                 /* peer does not support auth but sent a chunks list? */
 6566                 return (-31);
 6567         }
 6568         if (!SCTP_BASE_SYSCTL(sctp_asconf_auth_nochk) && stcb->asoc.peer_supports_asconf &&
 6569             !stcb->asoc.peer_supports_auth) {
 6570                 /* peer supports asconf but not auth? */
 6571                 return (-32);
 6572         } else if ((stcb->asoc.peer_supports_asconf) && (stcb->asoc.peer_supports_auth) &&
 6573             ((saw_asconf == 0) || (saw_asconf_ack == 0))) {
 6574                 return (-33);
 6575         }
 6576         /* concatenate the full random key */
 6577         keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len;
 6578         if (chunks != NULL) {
 6579                 keylen += sizeof(*chunks) + num_chunks;
 6580         }
 6581         new_key = sctp_alloc_key(keylen);
 6582         if (new_key != NULL) {
 6583                 /* copy in the RANDOM */
 6584                 if (p_random != NULL) {
 6585                         keylen = sizeof(*p_random) + random_len;
 6586                         bcopy(p_random, new_key->key, keylen);
 6587                 }
 6588                 /* append in the AUTH chunks */
 6589                 if (chunks != NULL) {
 6590                         bcopy(chunks, new_key->key + keylen,
 6591                             sizeof(*chunks) + num_chunks);
 6592                         keylen += sizeof(*chunks) + num_chunks;
 6593                 }
 6594                 /* append in the HMACs */
 6595                 if (hmacs != NULL) {
 6596                         bcopy(hmacs, new_key->key + keylen,
 6597                             sizeof(*hmacs) + hmacs_len);
 6598                 }
 6599         } else {
 6600                 /* failed to get memory for the key */
 6601                 return (-34);
 6602         }
 6603         if (stcb->asoc.authinfo.peer_random != NULL)
 6604                 sctp_free_key(stcb->asoc.authinfo.peer_random);
 6605         stcb->asoc.authinfo.peer_random = new_key;
 6606         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
 6607         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
 6608 
 6609         return (0);
 6610 }
 6611 
 6612 int
 6613 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
 6614     struct sctp_nets *net)
 6615 {
 6616         /* make sure the requested primary address exists in the assoc */
 6617         if (net == NULL && sa)
 6618                 net = sctp_findnet(stcb, sa);
 6619 
 6620         if (net == NULL) {
 6621                 /* didn't find the requested primary address! */
 6622                 return (-1);
 6623         } else {
 6624                 /* set the primary address */
 6625                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
 6626                         /* Must be confirmed, so queue to set */
 6627                         net->dest_state |= SCTP_ADDR_REQ_PRIMARY;
 6628                         return (0);
 6629                 }
 6630                 stcb->asoc.primary_destination = net;
 6631                 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) {
 6632                         sctp_free_remote_addr(stcb->asoc.alternate);
 6633                         stcb->asoc.alternate = NULL;
 6634                 }
 6635                 net = TAILQ_FIRST(&stcb->asoc.nets);
 6636                 if (net != stcb->asoc.primary_destination) {
 6637                         /*
 6638                          * first one on the list is NOT the primary
 6639                          * sctp_cmpaddr() is much more efficient if the
 6640                          * primary is the first on the list, make it so.
 6641                          */
 6642                         TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
 6643                         TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
 6644                 }
 6645                 return (0);
 6646         }
 6647 }
 6648 
 6649 int
 6650 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now)
 6651 {
 6652         /*
 6653          * This function serves two purposes. It will see if a TAG can be
 6654          * re-used and return 1 for yes it is ok and 0 for don't use that
 6655          * tag. A secondary function it will do is purge out old tags that
 6656          * can be removed.
 6657          */
 6658         struct sctpvtaghead *chain;
 6659         struct sctp_tagblock *twait_block;
 6660         struct sctpasochead *head;
 6661         struct sctp_tcb *stcb;
 6662         int i;
 6663 
 6664         SCTP_INP_INFO_RLOCK();
 6665         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
 6666             SCTP_BASE_INFO(hashasocmark))];
 6667         if (head == NULL) {
 6668                 /* invalid vtag */
 6669                 goto skip_vtag_check;
 6670         }
 6671         LIST_FOREACH(stcb, head, sctp_asocs) {
 6672                 /*
 6673                  * We choose not to lock anything here. TCB's can't be
 6674                  * removed since we have the read lock, so they can't be
 6675                  * freed on us, same thing for the INP. I may be wrong with
 6676                  * this assumption, but we will go with it for now :-)
 6677                  */
 6678                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
 6679                         continue;
 6680                 }
 6681                 if (stcb->asoc.my_vtag == tag) {
 6682                         /* candidate */
 6683                         if (stcb->rport != rport) {
 6684                                 continue;
 6685                         }
 6686                         if (stcb->sctp_ep->sctp_lport != lport) {
 6687                                 continue;
 6688                         }
 6689                         /* Its a used tag set */
 6690                         SCTP_INP_INFO_RUNLOCK();
 6691                         return (0);
 6692                 }
 6693         }
 6694 skip_vtag_check:
 6695 
 6696         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
 6697         /* Now what about timed wait ? */
 6698         if (!LIST_EMPTY(chain)) {
 6699                 /*
 6700                  * Block(s) are present, lets see if we have this tag in the
 6701                  * list
 6702                  */
 6703                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
 6704                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
 6705                                 if (twait_block->vtag_block[i].v_tag == 0) {
 6706                                         /* not used */
 6707                                         continue;
 6708                                 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire <
 6709                                     now->tv_sec) {
 6710                                         /* Audit expires this guy */
 6711                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
 6712                                         twait_block->vtag_block[i].v_tag = 0;
 6713                                         twait_block->vtag_block[i].lport = 0;
 6714                                         twait_block->vtag_block[i].rport = 0;
 6715                                 } else if ((twait_block->vtag_block[i].v_tag == tag) &&
 6716                                             (twait_block->vtag_block[i].lport == lport) &&
 6717                                     (twait_block->vtag_block[i].rport == rport)) {
 6718                                         /* Bad tag, sorry :< */
 6719                                         SCTP_INP_INFO_RUNLOCK();
 6720                                         return (0);
 6721                                 }
 6722                         }
 6723                 }
 6724         }
 6725         SCTP_INP_INFO_RUNLOCK();
 6726         return (1);
 6727 }
 6728 
 6729 static void
 6730 sctp_drain_mbufs(struct sctp_tcb *stcb)
 6731 {
 6732         /*
 6733          * We must hunt this association for MBUF's past the cumack (i.e.
 6734          * out of order data that we can renege on).
 6735          */
 6736         struct sctp_association *asoc;
 6737         struct sctp_tmit_chunk *chk, *nchk;
 6738         uint32_t cumulative_tsn_p1;
 6739         struct sctp_queued_to_read *ctl, *nctl;
 6740         int cnt, strmat;
 6741         uint32_t gap, i;
 6742         int fnd = 0;
 6743 
 6744         /* We look for anything larger than the cum-ack + 1 */
 6745 
 6746         asoc = &stcb->asoc;
 6747         if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) {
 6748                 /* none we can reneg on. */
 6749                 return;
 6750         }
 6751         SCTP_STAT_INCR(sctps_protocol_drains_done);
 6752         cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
 6753         cnt = 0;
 6754         /* First look in the re-assembly queue */
 6755         TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) {
 6756                 if (SCTP_TSN_GT(chk->rec.data.TSN_seq, cumulative_tsn_p1)) {
 6757                         /* Yep it is above cum-ack */
 6758                         cnt++;
 6759                         SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.TSN_seq, asoc->mapping_array_base_tsn);
 6760                         asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size);
 6761                         sctp_ucount_decr(asoc->cnt_on_reasm_queue);
 6762                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
 6763                         TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
 6764                         if (chk->data) {
 6765                                 sctp_m_freem(chk->data);
 6766                                 chk->data = NULL;
 6767                         }
 6768                         sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
 6769                 }
 6770         }
 6771         /* Ok that was fun, now we will drain all the inbound streams? */
 6772         for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
 6773                 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].inqueue, next, nctl) {
 6774                         if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) {
 6775                                 /* Yep it is above cum-ack */
 6776                                 cnt++;
 6777                                 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn);
 6778                                 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length);
 6779                                 sctp_ucount_decr(asoc->cnt_on_all_streams);
 6780                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
 6781                                 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, ctl, next);
 6782                                 if (ctl->data) {
 6783                                         sctp_m_freem(ctl->data);
 6784                                         ctl->data = NULL;
 6785                                 }
 6786                                 sctp_free_remote_addr(ctl->whoFrom);
 6787                                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl);
 6788                                 SCTP_DECR_READQ_COUNT();
 6789                         }
 6790                 }
 6791         }
 6792         if (cnt) {
 6793                 /* We must back down to see what the new highest is */
 6794                 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) {
 6795                         SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn);
 6796                         if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) {
 6797                                 asoc->highest_tsn_inside_map = i;
 6798                                 fnd = 1;
 6799                                 break;
 6800                         }
 6801                 }
 6802                 if (!fnd) {
 6803                         asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1;
 6804                 }
 6805                 /*
 6806                  * Question, should we go through the delivery queue? The
 6807                  * only reason things are on here is the app not reading OR
 6808                  * a p-d-api up. An attacker COULD send enough in to
 6809                  * initiate the PD-API and then send a bunch of stuff to
 6810                  * other streams... these would wind up on the delivery
 6811                  * queue.. and then we would not get to them. But in order
 6812                  * to do this I then have to back-track and un-deliver
 6813                  * sequence numbers in streams.. el-yucko. I think for now
 6814                  * we will NOT look at the delivery queue and leave it to be
 6815                  * something to consider later. An alternative would be to
 6816                  * abort the P-D-API with a notification and then deliver
 6817                  * the data.... Or another method might be to keep track of
 6818                  * how many times the situation occurs and if we see a
 6819                  * possible attack underway just abort the association.
 6820                  */
 6821 #ifdef SCTP_DEBUG
 6822                 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt);
 6823 #endif
 6824                 /*
 6825                  * Now do we need to find a new
 6826                  * asoc->highest_tsn_inside_map?
 6827                  */
 6828                 asoc->last_revoke_count = cnt;
 6829                 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
 6830                 /* sa_ignore NO_NULL_CHK */
 6831                 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED);
 6832                 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED);
 6833         }
 6834         /*
 6835          * Another issue, in un-setting the TSN's in the mapping array we
 6836          * DID NOT adjust the highest_tsn marker.  This will cause one of
 6837          * two things to occur. It may cause us to do extra work in checking
 6838          * for our mapping array movement. More importantly it may cause us
 6839          * to SACK every datagram. This may not be a bad thing though since
 6840          * we will recover once we get our cum-ack above and all this stuff
 6841          * we dumped recovered.
 6842          */
 6843 }
 6844 
 6845 void
 6846 sctp_drain()
 6847 {
 6848         /*
 6849          * We must walk the PCB lists for ALL associations here. The system
 6850          * is LOW on MBUF's and needs help. This is where reneging will
 6851          * occur. We really hope this does NOT happen!
 6852          */
 6853         VNET_ITERATOR_DECL(vnet_iter);
 6854         VNET_LIST_RLOCK_NOSLEEP();
 6855         VNET_FOREACH(vnet_iter) {
 6856                 CURVNET_SET(vnet_iter);
 6857                 struct sctp_inpcb *inp;
 6858                 struct sctp_tcb *stcb;
 6859 
 6860                 SCTP_STAT_INCR(sctps_protocol_drain_calls);
 6861                 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) {
 6862 #ifdef VIMAGE
 6863                         continue;
 6864 #else
 6865                         return;
 6866 #endif
 6867                 }
 6868                 SCTP_INP_INFO_RLOCK();
 6869                 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) {
 6870                         /* For each endpoint */
 6871                         SCTP_INP_RLOCK(inp);
 6872                         LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
 6873                                 /* For each association */
 6874                                 SCTP_TCB_LOCK(stcb);
 6875                                 sctp_drain_mbufs(stcb);
 6876                                 SCTP_TCB_UNLOCK(stcb);
 6877                         }
 6878                         SCTP_INP_RUNLOCK(inp);
 6879                 }
 6880                 SCTP_INP_INFO_RUNLOCK();
 6881                 CURVNET_RESTORE();
 6882         }
 6883         VNET_LIST_RUNLOCK_NOSLEEP();
 6884 }
 6885 
 6886 /*
 6887  * start a new iterator
 6888  * iterates through all endpoints and associations based on the pcb_state
 6889  * flags and asoc_state.  "af" (mandatory) is executed for all matching
 6890  * assocs and "ef" (optional) is executed when the iterator completes.
 6891  * "inpf" (optional) is executed for each new endpoint as it is being
 6892  * iterated through. inpe (optional) is called when the inp completes
 6893  * its way through all the stcbs.
 6894  */
 6895 int
 6896 sctp_initiate_iterator(inp_func inpf,
 6897     asoc_func af,
 6898     inp_func inpe,
 6899     uint32_t pcb_state,
 6900     uint32_t pcb_features,
 6901     uint32_t asoc_state,
 6902     void *argp,
 6903     uint32_t argi,
 6904     end_func ef,
 6905     struct sctp_inpcb *s_inp,
 6906     uint8_t chunk_output_off)
 6907 {
 6908         struct sctp_iterator *it = NULL;
 6909 
 6910         if (af == NULL) {
 6911                 return (-1);
 6912         }
 6913         SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator),
 6914             SCTP_M_ITER);
 6915         if (it == NULL) {
 6916                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
 6917                 return (ENOMEM);
 6918         }
 6919         memset(it, 0, sizeof(*it));
 6920         it->function_assoc = af;
 6921         it->function_inp = inpf;
 6922         if (inpf)
 6923                 it->done_current_ep = 0;
 6924         else
 6925                 it->done_current_ep = 1;
 6926         it->function_atend = ef;
 6927         it->pointer = argp;
 6928         it->val = argi;
 6929         it->pcb_flags = pcb_state;
 6930         it->pcb_features = pcb_features;
 6931         it->asoc_state = asoc_state;
 6932         it->function_inp_end = inpe;
 6933         it->no_chunk_output = chunk_output_off;
 6934         it->vn = curvnet;
 6935         if (s_inp) {
 6936                 /* Assume lock is held here */
 6937                 it->inp = s_inp;
 6938                 SCTP_INP_INCR_REF(it->inp);
 6939                 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
 6940         } else {
 6941                 SCTP_INP_INFO_RLOCK();
 6942                 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead));
 6943                 if (it->inp) {
 6944                         SCTP_INP_INCR_REF(it->inp);
 6945                 }
 6946                 SCTP_INP_INFO_RUNLOCK();
 6947                 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
 6948 
 6949         }
 6950         SCTP_IPI_ITERATOR_WQ_LOCK();
 6951 
 6952         TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
 6953         if (sctp_it_ctl.iterator_running == 0) {
 6954                 sctp_wakeup_iterator();
 6955         }
 6956         SCTP_IPI_ITERATOR_WQ_UNLOCK();
 6957         /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */
 6958         return (0);
 6959 }
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FreeBSD/Linux Kernel Cross Reference sys/netinet/sctp_pcb.c

FreeBSD/Linux Kernel Cross Reference
sys/netinet/sctp_pcb.c
