The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
sys/net80211/ieee80211_mesh.c

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    1 /*- 
    2  * Copyright (c) 2009 The FreeBSD Foundation 
    3  * All rights reserved. 
    4  * 
    5  * This software was developed by Rui Paulo under sponsorship from the
    6  * FreeBSD Foundation. 
    7  *  
    8  * Redistribution and use in source and binary forms, with or without 
    9  * modification, are permitted provided that the following conditions 
   10  * are met: 
   11  * 1. Redistributions of source code must retain the above copyright 
   12  *    notice, this list of conditions and the following disclaimer. 
   13  * 2. Redistributions in binary form must reproduce the above copyright 
   14  *    notice, this list of conditions and the following disclaimer in the 
   15  *    documentation and/or other materials provided with the distribution. 
   16  * 
   17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 
   18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
   19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
   20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 
   21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 
   22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 
   23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 
   24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 
   25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 
   26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 
   27  * SUCH DAMAGE. 
   28  */ 
   29 #include <sys/cdefs.h>
   30 #ifdef __FreeBSD__
   31 __FBSDID("$FreeBSD: releng/11.0/sys/net80211/ieee80211_mesh.c 300232 2016-05-19 21:08:33Z avos $");
   32 #endif
   33 
   34 /*
   35  * IEEE 802.11s Mesh Point (MBSS) support.
   36  *
   37  * Based on March 2009, D3.0 802.11s draft spec.
   38  */
   39 #include "opt_inet.h"
   40 #include "opt_wlan.h"
   41 
   42 #include <sys/param.h>
   43 #include <sys/systm.h> 
   44 #include <sys/mbuf.h>   
   45 #include <sys/malloc.h>
   46 #include <sys/kernel.h>
   47 
   48 #include <sys/socket.h>
   49 #include <sys/sockio.h>
   50 #include <sys/endian.h>
   51 #include <sys/errno.h>
   52 #include <sys/proc.h>
   53 #include <sys/sysctl.h>
   54 
   55 #include <net/bpf.h>
   56 #include <net/if.h>
   57 #include <net/if_var.h>
   58 #include <net/if_media.h>
   59 #include <net/if_llc.h>
   60 #include <net/ethernet.h>
   61 
   62 #include <net80211/ieee80211_var.h>
   63 #include <net80211/ieee80211_action.h>
   64 #ifdef IEEE80211_SUPPORT_SUPERG
   65 #include <net80211/ieee80211_superg.h>
   66 #endif
   67 #include <net80211/ieee80211_input.h>
   68 #include <net80211/ieee80211_mesh.h>
   69 
   70 static void     mesh_rt_flush_invalid(struct ieee80211vap *);
   71 static int      mesh_select_proto_path(struct ieee80211vap *, const char *);
   72 static int      mesh_select_proto_metric(struct ieee80211vap *, const char *);
   73 static void     mesh_vattach(struct ieee80211vap *);
   74 static int      mesh_newstate(struct ieee80211vap *, enum ieee80211_state, int);
   75 static void     mesh_rt_cleanup_cb(void *);
   76 static void     mesh_gatemode_setup(struct ieee80211vap *);
   77 static void     mesh_gatemode_cb(void *);
   78 static void     mesh_linkchange(struct ieee80211_node *,
   79                     enum ieee80211_mesh_mlstate);
   80 static void     mesh_checkid(void *, struct ieee80211_node *);
   81 static uint32_t mesh_generateid(struct ieee80211vap *);
   82 static int      mesh_checkpseq(struct ieee80211vap *,
   83                     const uint8_t [IEEE80211_ADDR_LEN], uint32_t);
   84 static void     mesh_transmit_to_gate(struct ieee80211vap *, struct mbuf *,
   85                     struct ieee80211_mesh_route *);
   86 static void     mesh_forward(struct ieee80211vap *, struct mbuf *,
   87                     const struct ieee80211_meshcntl *);
   88 static int      mesh_input(struct ieee80211_node *, struct mbuf *,
   89                     const struct ieee80211_rx_stats *rxs, int, int);
   90 static void     mesh_recv_mgmt(struct ieee80211_node *, struct mbuf *, int,
   91                     const struct ieee80211_rx_stats *rxs, int, int);
   92 static void     mesh_recv_ctl(struct ieee80211_node *, struct mbuf *, int);
   93 static void     mesh_peer_timeout_setup(struct ieee80211_node *);
   94 static void     mesh_peer_timeout_backoff(struct ieee80211_node *);
   95 static void     mesh_peer_timeout_cb(void *);
   96 static __inline void
   97                 mesh_peer_timeout_stop(struct ieee80211_node *);
   98 static int      mesh_verify_meshid(struct ieee80211vap *, const uint8_t *);
   99 static int      mesh_verify_meshconf(struct ieee80211vap *, const uint8_t *);
  100 static int      mesh_verify_meshpeer(struct ieee80211vap *, uint8_t,
  101                     const uint8_t *);
  102 uint32_t        mesh_airtime_calc(struct ieee80211_node *);
  103 
  104 /*
  105  * Timeout values come from the specification and are in milliseconds.
  106  */
  107 static SYSCTL_NODE(_net_wlan, OID_AUTO, mesh, CTLFLAG_RD, 0,
  108     "IEEE 802.11s parameters");
  109 static int      ieee80211_mesh_gateint = -1;
  110 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, gateint, CTLTYPE_INT | CTLFLAG_RW,
  111     &ieee80211_mesh_gateint, 0, ieee80211_sysctl_msecs_ticks, "I",
  112     "mesh gate interval (ms)");
  113 static int ieee80211_mesh_retrytimeout = -1;
  114 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, retrytimeout, CTLTYPE_INT | CTLFLAG_RW,
  115     &ieee80211_mesh_retrytimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
  116     "Retry timeout (msec)");
  117 static int ieee80211_mesh_holdingtimeout = -1;
  118 
  119 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, holdingtimeout, CTLTYPE_INT | CTLFLAG_RW,
  120     &ieee80211_mesh_holdingtimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
  121     "Holding state timeout (msec)");
  122 static int ieee80211_mesh_confirmtimeout = -1;
  123 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, confirmtimeout, CTLTYPE_INT | CTLFLAG_RW,
  124     &ieee80211_mesh_confirmtimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
  125     "Confirm state timeout (msec)");
  126 static int ieee80211_mesh_backofftimeout = -1;
  127 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, backofftimeout, CTLTYPE_INT | CTLFLAG_RW,
  128     &ieee80211_mesh_backofftimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
  129     "Backoff timeout (msec). This is to throutles peering forever when "
  130     "not receiving answer or is rejected by a neighbor");
  131 static int ieee80211_mesh_maxretries = 2;
  132 SYSCTL_INT(_net_wlan_mesh, OID_AUTO, maxretries, CTLFLAG_RW,
  133     &ieee80211_mesh_maxretries, 0,
  134     "Maximum retries during peer link establishment");
  135 static int ieee80211_mesh_maxholding = 2;
  136 SYSCTL_INT(_net_wlan_mesh, OID_AUTO, maxholding, CTLFLAG_RW,
  137     &ieee80211_mesh_maxholding, 0,
  138     "Maximum times we are allowed to transition to HOLDING state before "
  139     "backinoff during peer link establishment");
  140 
  141 static const uint8_t broadcastaddr[IEEE80211_ADDR_LEN] =
  142         { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
  143 
  144 static  ieee80211_recv_action_func mesh_recv_action_meshpeering_open;
  145 static  ieee80211_recv_action_func mesh_recv_action_meshpeering_confirm;
  146 static  ieee80211_recv_action_func mesh_recv_action_meshpeering_close;
  147 static  ieee80211_recv_action_func mesh_recv_action_meshlmetric;
  148 static  ieee80211_recv_action_func mesh_recv_action_meshgate;
  149 
  150 static  ieee80211_send_action_func mesh_send_action_meshpeering_open;
  151 static  ieee80211_send_action_func mesh_send_action_meshpeering_confirm;
  152 static  ieee80211_send_action_func mesh_send_action_meshpeering_close;
  153 static  ieee80211_send_action_func mesh_send_action_meshlmetric;
  154 static  ieee80211_send_action_func mesh_send_action_meshgate;
  155 
  156 static const struct ieee80211_mesh_proto_metric mesh_metric_airtime = {
  157         .mpm_descr      = "AIRTIME",
  158         .mpm_ie         = IEEE80211_MESHCONF_METRIC_AIRTIME,
  159         .mpm_metric     = mesh_airtime_calc,
  160 };
  161 
  162 static struct ieee80211_mesh_proto_path         mesh_proto_paths[4];
  163 static struct ieee80211_mesh_proto_metric       mesh_proto_metrics[4];
  164 
  165 MALLOC_DEFINE(M_80211_MESH_PREQ, "80211preq", "802.11 MESH Path Request frame");
  166 MALLOC_DEFINE(M_80211_MESH_PREP, "80211prep", "802.11 MESH Path Reply frame");
  167 MALLOC_DEFINE(M_80211_MESH_PERR, "80211perr", "802.11 MESH Path Error frame");
  168 
  169 /* The longer one of the lifetime should be stored as new lifetime */
  170 #define MESH_ROUTE_LIFETIME_MAX(a, b)   (a > b ? a : b)
  171 
  172 MALLOC_DEFINE(M_80211_MESH_RT, "80211mesh_rt", "802.11s routing table");
  173 MALLOC_DEFINE(M_80211_MESH_GT_RT, "80211mesh_gt", "802.11s known gates table");
  174 
  175 /*
  176  * Helper functions to manipulate the Mesh routing table.
  177  */
  178 
  179 static struct ieee80211_mesh_route *
  180 mesh_rt_find_locked(struct ieee80211_mesh_state *ms,
  181     const uint8_t dest[IEEE80211_ADDR_LEN])
  182 {
  183         struct ieee80211_mesh_route *rt;
  184 
  185         MESH_RT_LOCK_ASSERT(ms);
  186 
  187         TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) {
  188                 if (IEEE80211_ADDR_EQ(dest, rt->rt_dest))
  189                         return rt;
  190         }
  191         return NULL;
  192 }
  193 
  194 static struct ieee80211_mesh_route *
  195 mesh_rt_add_locked(struct ieee80211vap *vap,
  196     const uint8_t dest[IEEE80211_ADDR_LEN])
  197 {
  198         struct ieee80211_mesh_state *ms = vap->iv_mesh;
  199         struct ieee80211_mesh_route *rt;
  200 
  201         KASSERT(!IEEE80211_ADDR_EQ(broadcastaddr, dest),
  202             ("%s: adding broadcast to the routing table", __func__));
  203 
  204         MESH_RT_LOCK_ASSERT(ms);
  205 
  206         rt = IEEE80211_MALLOC(ALIGN(sizeof(struct ieee80211_mesh_route)) +
  207             ms->ms_ppath->mpp_privlen, M_80211_MESH_RT,
  208             IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
  209         if (rt != NULL) {
  210                 rt->rt_vap = vap;
  211                 IEEE80211_ADDR_COPY(rt->rt_dest, dest);
  212                 rt->rt_priv = (void *)ALIGN(&rt[1]);
  213                 MESH_RT_ENTRY_LOCK_INIT(rt, "MBSS_RT");
  214                 callout_init(&rt->rt_discovery, 1);
  215                 rt->rt_updtime = ticks; /* create time */
  216                 TAILQ_INSERT_TAIL(&ms->ms_routes, rt, rt_next);
  217         }
  218         return rt;
  219 }
  220 
  221 struct ieee80211_mesh_route *
  222 ieee80211_mesh_rt_find(struct ieee80211vap *vap,
  223     const uint8_t dest[IEEE80211_ADDR_LEN])
  224 {
  225         struct ieee80211_mesh_state *ms = vap->iv_mesh;
  226         struct ieee80211_mesh_route *rt;
  227 
  228         MESH_RT_LOCK(ms);
  229         rt = mesh_rt_find_locked(ms, dest);
  230         MESH_RT_UNLOCK(ms);
  231         return rt;
  232 }
  233 
  234 struct ieee80211_mesh_route *
  235 ieee80211_mesh_rt_add(struct ieee80211vap *vap,
  236     const uint8_t dest[IEEE80211_ADDR_LEN])
  237 {
  238         struct ieee80211_mesh_state *ms = vap->iv_mesh;
  239         struct ieee80211_mesh_route *rt;
  240 
  241         KASSERT(ieee80211_mesh_rt_find(vap, dest) == NULL,
  242             ("%s: duplicate entry in the routing table", __func__));
  243         KASSERT(!IEEE80211_ADDR_EQ(vap->iv_myaddr, dest),
  244             ("%s: adding self to the routing table", __func__));
  245 
  246         MESH_RT_LOCK(ms);
  247         rt = mesh_rt_add_locked(vap, dest);
  248         MESH_RT_UNLOCK(ms);
  249         return rt;
  250 }
  251 
  252 /*
  253  * Update the route lifetime and returns the updated lifetime.
  254  * If new_lifetime is zero and route is timedout it will be invalidated.
  255  * new_lifetime is in msec
  256  */
  257 int
  258 ieee80211_mesh_rt_update(struct ieee80211_mesh_route *rt, int new_lifetime)
  259 {
  260         int timesince, now;
  261         uint32_t lifetime = 0;
  262 
  263         KASSERT(rt != NULL, ("route is NULL"));
  264 
  265         now = ticks;
  266         MESH_RT_ENTRY_LOCK(rt);
  267 
  268         /* dont clobber a proxy entry gated by us */
  269         if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY && rt->rt_nhops == 0) {
  270                 MESH_RT_ENTRY_UNLOCK(rt);
  271                 return rt->rt_lifetime;
  272         }
  273 
  274         timesince = ticks_to_msecs(now - rt->rt_updtime);
  275         rt->rt_updtime = now;
  276         if (timesince >= rt->rt_lifetime) {
  277                 if (new_lifetime != 0) {
  278                         rt->rt_lifetime = new_lifetime;
  279                 }
  280                 else {
  281                         rt->rt_flags &= ~IEEE80211_MESHRT_FLAGS_VALID;
  282                         rt->rt_lifetime = 0;
  283                 }
  284         } else {
  285                 /* update what is left of lifetime */
  286                 rt->rt_lifetime = rt->rt_lifetime - timesince;
  287                 rt->rt_lifetime  = MESH_ROUTE_LIFETIME_MAX(
  288                         new_lifetime, rt->rt_lifetime);
  289         }
  290         lifetime = rt->rt_lifetime;
  291         MESH_RT_ENTRY_UNLOCK(rt);
  292 
  293         return lifetime;
  294 }
  295 
  296 /*
  297  * Add a proxy route (as needed) for the specified destination.
  298  */
  299 void
  300 ieee80211_mesh_proxy_check(struct ieee80211vap *vap,
  301     const uint8_t dest[IEEE80211_ADDR_LEN])
  302 {
  303         struct ieee80211_mesh_state *ms = vap->iv_mesh;
  304         struct ieee80211_mesh_route *rt;
  305 
  306         MESH_RT_LOCK(ms);
  307         rt = mesh_rt_find_locked(ms, dest);
  308         if (rt == NULL) {
  309                 rt = mesh_rt_add_locked(vap, dest);
  310                 if (rt == NULL) {
  311                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
  312                             "%s", "unable to add proxy entry");
  313                         vap->iv_stats.is_mesh_rtaddfailed++;
  314                 } else {
  315                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
  316                             "%s", "add proxy entry");
  317                         IEEE80211_ADDR_COPY(rt->rt_mesh_gate, vap->iv_myaddr);
  318                         IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr);
  319                         rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID
  320                                      |  IEEE80211_MESHRT_FLAGS_PROXY;
  321                 }
  322         } else if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) {
  323                 KASSERT(rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY,
  324                     ("no proxy flag for poxy entry"));
  325                 struct ieee80211com *ic = vap->iv_ic;
  326                 /*
  327                  * Fix existing entry created by received frames from
  328                  * stations that have some memory of dest.  We also
  329                  * flush any frames held on the staging queue; delivering
  330                  * them is too much trouble right now.
  331                  */
  332                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
  333                     "%s", "fix proxy entry");
  334                 IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr);
  335                 rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID
  336                              |  IEEE80211_MESHRT_FLAGS_PROXY;
  337                 /* XXX belongs in hwmp */
  338                 ieee80211_ageq_drain_node(&ic->ic_stageq,
  339                    (void *)(uintptr_t) ieee80211_mac_hash(ic, dest));
  340                 /* XXX stat? */
  341         }
  342         MESH_RT_UNLOCK(ms);
  343 }
  344 
  345 static __inline void
  346 mesh_rt_del(struct ieee80211_mesh_state *ms, struct ieee80211_mesh_route *rt)
  347 {
  348         TAILQ_REMOVE(&ms->ms_routes, rt, rt_next);
  349         /*
  350          * Grab the lock before destroying it, to be sure no one else
  351          * is holding the route.
  352          */
  353         MESH_RT_ENTRY_LOCK(rt);
  354         callout_drain(&rt->rt_discovery);
  355         MESH_RT_ENTRY_LOCK_DESTROY(rt);
  356         IEEE80211_FREE(rt, M_80211_MESH_RT);
  357 }
  358 
  359 void
  360 ieee80211_mesh_rt_del(struct ieee80211vap *vap,
  361     const uint8_t dest[IEEE80211_ADDR_LEN])
  362 {
  363         struct ieee80211_mesh_state *ms = vap->iv_mesh;
  364         struct ieee80211_mesh_route *rt, *next;
  365 
  366         MESH_RT_LOCK(ms);
  367         TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) {
  368                 if (IEEE80211_ADDR_EQ(rt->rt_dest, dest)) {
  369                         if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) {
  370                                 ms->ms_ppath->mpp_senderror(vap, dest, rt,
  371                                     IEEE80211_REASON_MESH_PERR_NO_PROXY);
  372                         } else {
  373                                 ms->ms_ppath->mpp_senderror(vap, dest, rt,
  374                                     IEEE80211_REASON_MESH_PERR_DEST_UNREACH);
  375                         }
  376                         mesh_rt_del(ms, rt);
  377                         MESH_RT_UNLOCK(ms);
  378                         return;
  379                 }
  380         }
  381         MESH_RT_UNLOCK(ms);
  382 }
  383 
  384 void
  385 ieee80211_mesh_rt_flush(struct ieee80211vap *vap)
  386 {
  387         struct ieee80211_mesh_state *ms = vap->iv_mesh;
  388         struct ieee80211_mesh_route *rt, *next;
  389 
  390         if (ms == NULL)
  391                 return;
  392         MESH_RT_LOCK(ms);
  393         TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next)
  394                 mesh_rt_del(ms, rt);
  395         MESH_RT_UNLOCK(ms);
  396 }
  397 
  398 void
  399 ieee80211_mesh_rt_flush_peer(struct ieee80211vap *vap,
  400     const uint8_t peer[IEEE80211_ADDR_LEN])
  401 {
  402         struct ieee80211_mesh_state *ms = vap->iv_mesh;
  403         struct ieee80211_mesh_route *rt, *next;
  404 
  405         MESH_RT_LOCK(ms);
  406         TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) {
  407                 if (IEEE80211_ADDR_EQ(rt->rt_nexthop, peer))
  408                         mesh_rt_del(ms, rt);
  409         }
  410         MESH_RT_UNLOCK(ms);
  411 }
  412 
  413 /*
  414  * Flush expired routing entries, i.e. those in invalid state for
  415  * some time.
  416  */
  417 static void
  418 mesh_rt_flush_invalid(struct ieee80211vap *vap)
  419 {
  420         struct ieee80211_mesh_state *ms = vap->iv_mesh;
  421         struct ieee80211_mesh_route *rt, *next;
  422 
  423         if (ms == NULL)
  424                 return;
  425         MESH_RT_LOCK(ms);
  426         TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) {
  427                 /* Discover paths will be deleted by their own callout */
  428                 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_DISCOVER)
  429                         continue;
  430                 ieee80211_mesh_rt_update(rt, 0);
  431                 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0)
  432                         mesh_rt_del(ms, rt);
  433         }
  434         MESH_RT_UNLOCK(ms);
  435 }
  436 
  437 int
  438 ieee80211_mesh_register_proto_path(const struct ieee80211_mesh_proto_path *mpp)
  439 {
  440         int i, firstempty = -1;
  441 
  442         for (i = 0; i < nitems(mesh_proto_paths); i++) {
  443                 if (strncmp(mpp->mpp_descr, mesh_proto_paths[i].mpp_descr,
  444                     IEEE80211_MESH_PROTO_DSZ) == 0)
  445                         return EEXIST;
  446                 if (!mesh_proto_paths[i].mpp_active && firstempty == -1)
  447                         firstempty = i;
  448         }
  449         if (firstempty < 0)
  450                 return ENOSPC;
  451         memcpy(&mesh_proto_paths[firstempty], mpp, sizeof(*mpp));
  452         mesh_proto_paths[firstempty].mpp_active = 1;
  453         return 0;
  454 }
  455 
  456 int
  457 ieee80211_mesh_register_proto_metric(const struct
  458     ieee80211_mesh_proto_metric *mpm)
  459 {
  460         int i, firstempty = -1;
  461 
  462         for (i = 0; i < nitems(mesh_proto_metrics); i++) {
  463                 if (strncmp(mpm->mpm_descr, mesh_proto_metrics[i].mpm_descr,
  464                     IEEE80211_MESH_PROTO_DSZ) == 0)
  465                         return EEXIST;
  466                 if (!mesh_proto_metrics[i].mpm_active && firstempty == -1)
  467                         firstempty = i;
  468         }
  469         if (firstempty < 0)
  470                 return ENOSPC;
  471         memcpy(&mesh_proto_metrics[firstempty], mpm, sizeof(*mpm));
  472         mesh_proto_metrics[firstempty].mpm_active = 1;
  473         return 0;
  474 }
  475 
  476 static int
  477 mesh_select_proto_path(struct ieee80211vap *vap, const char *name)
  478 {
  479         struct ieee80211_mesh_state *ms = vap->iv_mesh;
  480         int i;
  481 
  482         for (i = 0; i < nitems(mesh_proto_paths); i++) {
  483                 if (strcasecmp(mesh_proto_paths[i].mpp_descr, name) == 0) {
  484                         ms->ms_ppath = &mesh_proto_paths[i];
  485                         return 0;
  486                 }
  487         }
  488         return ENOENT;
  489 }
  490 
  491 static int
  492 mesh_select_proto_metric(struct ieee80211vap *vap, const char *name)
  493 {
  494         struct ieee80211_mesh_state *ms = vap->iv_mesh;
  495         int i;
  496 
  497         for (i = 0; i < nitems(mesh_proto_metrics); i++) {
  498                 if (strcasecmp(mesh_proto_metrics[i].mpm_descr, name) == 0) {
  499                         ms->ms_pmetric = &mesh_proto_metrics[i];
  500                         return 0;
  501                 }
  502         }
  503         return ENOENT;
  504 }
  505 
  506 static void
  507 mesh_gatemode_setup(struct ieee80211vap *vap)
  508 {
  509         struct ieee80211_mesh_state *ms = vap->iv_mesh;
  510 
  511         /*
  512          * NB: When a mesh gate is running as a ROOT it shall
  513          * not send out periodic GANNs but instead mark the
  514          * mesh gate flag for the corresponding proactive PREQ
  515          * and RANN frames.
  516          */
  517         if (ms->ms_flags & IEEE80211_MESHFLAGS_ROOT ||
  518             (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) == 0) {
  519                 callout_drain(&ms->ms_gatetimer);
  520                 return ;
  521         }
  522         callout_reset(&ms->ms_gatetimer, ieee80211_mesh_gateint,
  523             mesh_gatemode_cb, vap);
  524 }
  525 
  526 static void
  527 mesh_gatemode_cb(void *arg)
  528 {
  529         struct ieee80211vap *vap = (struct ieee80211vap *)arg;
  530         struct ieee80211_mesh_state *ms = vap->iv_mesh;
  531         struct ieee80211_meshgann_ie gann;
  532 
  533         gann.gann_flags = 0; /* Reserved */
  534         gann.gann_hopcount = 0;
  535         gann.gann_ttl = ms->ms_ttl;
  536         IEEE80211_ADDR_COPY(gann.gann_addr, vap->iv_myaddr);
  537         gann.gann_seq = ms->ms_gateseq++;
  538         gann.gann_interval = ieee80211_mesh_gateint;
  539 
  540         IEEE80211_NOTE(vap, IEEE80211_MSG_MESH, vap->iv_bss,
  541             "send broadcast GANN (seq %u)", gann.gann_seq);
  542 
  543         ieee80211_send_action(vap->iv_bss, IEEE80211_ACTION_CAT_MESH,
  544             IEEE80211_ACTION_MESH_GANN, &gann);
  545         mesh_gatemode_setup(vap);
  546 }
  547 
  548 static void
  549 ieee80211_mesh_init(void)
  550 {
  551 
  552         memset(mesh_proto_paths, 0, sizeof(mesh_proto_paths));
  553         memset(mesh_proto_metrics, 0, sizeof(mesh_proto_metrics));
  554 
  555         /*
  556          * Setup mesh parameters that depends on the clock frequency.
  557          */
  558         ieee80211_mesh_gateint = msecs_to_ticks(10000);
  559         ieee80211_mesh_retrytimeout = msecs_to_ticks(40);
  560         ieee80211_mesh_holdingtimeout = msecs_to_ticks(40);
  561         ieee80211_mesh_confirmtimeout = msecs_to_ticks(40);
  562         ieee80211_mesh_backofftimeout = msecs_to_ticks(5000);
  563 
  564         /*
  565          * Register action frame handlers.
  566          */
  567         ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
  568             IEEE80211_ACTION_MESHPEERING_OPEN,
  569             mesh_recv_action_meshpeering_open);
  570         ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
  571             IEEE80211_ACTION_MESHPEERING_CONFIRM,
  572             mesh_recv_action_meshpeering_confirm);
  573         ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
  574             IEEE80211_ACTION_MESHPEERING_CLOSE,
  575             mesh_recv_action_meshpeering_close);
  576         ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESH,
  577             IEEE80211_ACTION_MESH_LMETRIC, mesh_recv_action_meshlmetric);
  578         ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESH,
  579             IEEE80211_ACTION_MESH_GANN, mesh_recv_action_meshgate);
  580 
  581         ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
  582             IEEE80211_ACTION_MESHPEERING_OPEN,
  583             mesh_send_action_meshpeering_open);
  584         ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
  585             IEEE80211_ACTION_MESHPEERING_CONFIRM,
  586             mesh_send_action_meshpeering_confirm);
  587         ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
  588             IEEE80211_ACTION_MESHPEERING_CLOSE,
  589             mesh_send_action_meshpeering_close);
  590         ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESH,
  591             IEEE80211_ACTION_MESH_LMETRIC,
  592             mesh_send_action_meshlmetric);
  593         ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESH,
  594             IEEE80211_ACTION_MESH_GANN,
  595             mesh_send_action_meshgate);
  596 
  597         /*
  598          * Register Airtime Link Metric.
  599          */
  600         ieee80211_mesh_register_proto_metric(&mesh_metric_airtime);
  601 
  602 }
  603 SYSINIT(wlan_mesh, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_mesh_init, NULL);
  604 
  605 void
  606 ieee80211_mesh_attach(struct ieee80211com *ic)
  607 {
  608         ic->ic_vattach[IEEE80211_M_MBSS] = mesh_vattach;
  609 }
  610 
  611 void
  612 ieee80211_mesh_detach(struct ieee80211com *ic)
  613 {
  614 }
  615 
  616 static void
  617 mesh_vdetach_peers(void *arg, struct ieee80211_node *ni)
  618 {
  619         struct ieee80211com *ic = ni->ni_ic;
  620         uint16_t args[3];
  621 
  622         if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED) {
  623                 args[0] = ni->ni_mlpid;
  624                 args[1] = ni->ni_mllid;
  625                 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
  626                 ieee80211_send_action(ni,
  627                     IEEE80211_ACTION_CAT_SELF_PROT,
  628                     IEEE80211_ACTION_MESHPEERING_CLOSE,
  629                     args);
  630         }
  631         callout_drain(&ni->ni_mltimer);
  632         /* XXX belongs in hwmp */
  633         ieee80211_ageq_drain_node(&ic->ic_stageq,
  634            (void *)(uintptr_t) ieee80211_mac_hash(ic, ni->ni_macaddr));
  635 }
  636 
  637 static void
  638 mesh_vdetach(struct ieee80211vap *vap)
  639 {
  640         struct ieee80211_mesh_state *ms = vap->iv_mesh;
  641 
  642         callout_drain(&ms->ms_cleantimer);
  643         ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_vdetach_peers,
  644             NULL);
  645         ieee80211_mesh_rt_flush(vap);
  646         MESH_RT_LOCK_DESTROY(ms);
  647         ms->ms_ppath->mpp_vdetach(vap);
  648         IEEE80211_FREE(vap->iv_mesh, M_80211_VAP);
  649         vap->iv_mesh = NULL;
  650 }
  651 
  652 static void
  653 mesh_vattach(struct ieee80211vap *vap)
  654 {
  655         struct ieee80211_mesh_state *ms;
  656         vap->iv_newstate = mesh_newstate;
  657         vap->iv_input = mesh_input;
  658         vap->iv_opdetach = mesh_vdetach;
  659         vap->iv_recv_mgmt = mesh_recv_mgmt;
  660         vap->iv_recv_ctl = mesh_recv_ctl;
  661         ms = IEEE80211_MALLOC(sizeof(struct ieee80211_mesh_state), M_80211_VAP,
  662             IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
  663         if (ms == NULL) {
  664                 printf("%s: couldn't alloc MBSS state\n", __func__);
  665                 return;
  666         }
  667         vap->iv_mesh = ms;
  668         ms->ms_seq = 0;
  669         ms->ms_flags = (IEEE80211_MESHFLAGS_AP | IEEE80211_MESHFLAGS_FWD);
  670         ms->ms_ttl = IEEE80211_MESH_DEFAULT_TTL;
  671         TAILQ_INIT(&ms->ms_known_gates);
  672         TAILQ_INIT(&ms->ms_routes);
  673         MESH_RT_LOCK_INIT(ms, "MBSS");
  674         callout_init(&ms->ms_cleantimer, 1);
  675         callout_init(&ms->ms_gatetimer, 1);
  676         ms->ms_gateseq = 0;
  677         mesh_select_proto_metric(vap, "AIRTIME");
  678         KASSERT(ms->ms_pmetric, ("ms_pmetric == NULL"));
  679         mesh_select_proto_path(vap, "HWMP");
  680         KASSERT(ms->ms_ppath, ("ms_ppath == NULL"));
  681         ms->ms_ppath->mpp_vattach(vap);
  682 }
  683 
  684 /*
  685  * IEEE80211_M_MBSS vap state machine handler.
  686  */
  687 static int
  688 mesh_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
  689 {
  690         struct ieee80211_mesh_state *ms = vap->iv_mesh;
  691         struct ieee80211com *ic = vap->iv_ic;
  692         struct ieee80211_node *ni;
  693         enum ieee80211_state ostate;
  694 
  695         IEEE80211_LOCK_ASSERT(ic);
  696 
  697         ostate = vap->iv_state;
  698         IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n",
  699             __func__, ieee80211_state_name[ostate],
  700             ieee80211_state_name[nstate], arg);
  701         vap->iv_state = nstate;         /* state transition */
  702         if (ostate != IEEE80211_S_SCAN)
  703                 ieee80211_cancel_scan(vap);     /* background scan */
  704         ni = vap->iv_bss;                       /* NB: no reference held */
  705         if (nstate != IEEE80211_S_RUN && ostate == IEEE80211_S_RUN) {
  706                 callout_drain(&ms->ms_cleantimer);
  707                 callout_drain(&ms->ms_gatetimer);
  708         }
  709         switch (nstate) {
  710         case IEEE80211_S_INIT:
  711                 switch (ostate) {
  712                 case IEEE80211_S_SCAN:
  713                         ieee80211_cancel_scan(vap);
  714                         break;
  715                 case IEEE80211_S_CAC:
  716                         ieee80211_dfs_cac_stop(vap);
  717                         break;
  718                 case IEEE80211_S_RUN:
  719                         ieee80211_iterate_nodes(&ic->ic_sta,
  720                             mesh_vdetach_peers, NULL);
  721                         break;
  722                 default:
  723                         break;
  724                 }
  725                 if (ostate != IEEE80211_S_INIT) {
  726                         /* NB: optimize INIT -> INIT case */
  727                         ieee80211_reset_bss(vap);
  728                         ieee80211_mesh_rt_flush(vap);
  729                 }
  730                 break;
  731         case IEEE80211_S_SCAN:
  732                 switch (ostate) {
  733                 case IEEE80211_S_INIT:
  734                         if (vap->iv_des_chan != IEEE80211_CHAN_ANYC &&
  735                             !IEEE80211_IS_CHAN_RADAR(vap->iv_des_chan) &&
  736                             ms->ms_idlen != 0) {
  737                                 /*
  738                                  * Already have a channel and a mesh ID; bypass
  739                                  * the scan and startup immediately.
  740                                  */
  741                                 ieee80211_create_ibss(vap, vap->iv_des_chan);
  742                                 break;
  743                         }
  744                         /*
  745                          * Initiate a scan.  We can come here as a result
  746                          * of an IEEE80211_IOC_SCAN_REQ too in which case
  747                          * the vap will be marked with IEEE80211_FEXT_SCANREQ
  748                          * and the scan request parameters will be present
  749                          * in iv_scanreq.  Otherwise we do the default.
  750                         */
  751                         if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) {
  752                                 ieee80211_check_scan(vap,
  753                                     vap->iv_scanreq_flags,
  754                                     vap->iv_scanreq_duration,
  755                                     vap->iv_scanreq_mindwell,
  756                                     vap->iv_scanreq_maxdwell,
  757                                     vap->iv_scanreq_nssid, vap->iv_scanreq_ssid);
  758                                 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ;
  759                         } else
  760                                 ieee80211_check_scan_current(vap);
  761                         break;
  762                 default:
  763                         break;
  764                 }
  765                 break;
  766         case IEEE80211_S_CAC:
  767                 /*
  768                  * Start CAC on a DFS channel.  We come here when starting
  769                  * a bss on a DFS channel (see ieee80211_create_ibss).
  770                  */
  771                 ieee80211_dfs_cac_start(vap);
  772                 break;
  773         case IEEE80211_S_RUN:
  774                 switch (ostate) {
  775                 case IEEE80211_S_INIT:
  776                         /*
  777                          * Already have a channel; bypass the
  778                          * scan and startup immediately.
  779                          * Note that ieee80211_create_ibss will call
  780                          * back to do a RUN->RUN state change.
  781                          */
  782                         ieee80211_create_ibss(vap,
  783                             ieee80211_ht_adjust_channel(ic,
  784                                 ic->ic_curchan, vap->iv_flags_ht));
  785                         /* NB: iv_bss is changed on return */
  786                         break;
  787                 case IEEE80211_S_CAC:
  788                         /*
  789                          * NB: This is the normal state change when CAC
  790                          * expires and no radar was detected; no need to
  791                          * clear the CAC timer as it's already expired.
  792                          */
  793                         /* fall thru... */
  794                 case IEEE80211_S_CSA:
  795 #if 0
  796                         /*
  797                          * Shorten inactivity timer of associated stations
  798                          * to weed out sta's that don't follow a CSA.
  799                          */
  800                         ieee80211_iterate_nodes(&ic->ic_sta, sta_csa, vap);
  801 #endif
  802                         /*
  803                          * Update bss node channel to reflect where
  804                          * we landed after CSA.
  805                          */
  806                         ieee80211_node_set_chan(ni,
  807                             ieee80211_ht_adjust_channel(ic, ic->ic_curchan,
  808                                 ieee80211_htchanflags(ni->ni_chan)));
  809                         /* XXX bypass debug msgs */
  810                         break;
  811                 case IEEE80211_S_SCAN:
  812                 case IEEE80211_S_RUN:
  813 #ifdef IEEE80211_DEBUG
  814                         if (ieee80211_msg_debug(vap)) {
  815                                 ieee80211_note(vap,
  816                                     "synchronized with %s meshid ",
  817                                     ether_sprintf(ni->ni_meshid));
  818                                 ieee80211_print_essid(ni->ni_meshid,
  819                                     ni->ni_meshidlen);
  820                                 /* XXX MCS/HT */
  821                                 printf(" channel %d\n",
  822                                     ieee80211_chan2ieee(ic, ic->ic_curchan));
  823                         }
  824 #endif
  825                         break;
  826                 default:
  827                         break;
  828                 }
  829                 ieee80211_node_authorize(ni);
  830                 callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact,
  831                     mesh_rt_cleanup_cb, vap);
  832                 mesh_gatemode_setup(vap);
  833                 break;
  834         default:
  835                 break;
  836         }
  837         /* NB: ostate not nstate */
  838         ms->ms_ppath->mpp_newstate(vap, ostate, arg);
  839         return 0;
  840 }
  841 
  842 static void
  843 mesh_rt_cleanup_cb(void *arg)
  844 {
  845         struct ieee80211vap *vap = arg;
  846         struct ieee80211_mesh_state *ms = vap->iv_mesh;
  847 
  848         mesh_rt_flush_invalid(vap);
  849         callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact,
  850             mesh_rt_cleanup_cb, vap);
  851 }
  852 
  853 /*
  854  * Mark a mesh STA as gate and return a pointer to it.
  855  * If this is first time, we create a new gate route.
  856  * Always update the path route to this mesh gate.
  857  */
  858 struct ieee80211_mesh_gate_route *
  859 ieee80211_mesh_mark_gate(struct ieee80211vap *vap, const uint8_t *addr,
  860     struct ieee80211_mesh_route *rt)
  861 {
  862         struct ieee80211_mesh_state *ms = vap->iv_mesh;
  863         struct ieee80211_mesh_gate_route *gr = NULL, *next;
  864         int found = 0;
  865 
  866         MESH_RT_LOCK(ms);
  867         TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) {
  868                 if (IEEE80211_ADDR_EQ(gr->gr_addr, addr)) {
  869                         found = 1;
  870                         break;
  871                 }
  872         }
  873 
  874         if (!found) {
  875                 /* New mesh gate add it to known table. */
  876                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, addr,
  877                     "%s", "stored new gate information from pro-PREQ.");
  878                 gr = IEEE80211_MALLOC(ALIGN(sizeof(struct ieee80211_mesh_gate_route)),
  879                     M_80211_MESH_GT_RT,
  880                     IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
  881                 IEEE80211_ADDR_COPY(gr->gr_addr, addr);
  882                 TAILQ_INSERT_TAIL(&ms->ms_known_gates, gr, gr_next);
  883         }
  884         gr->gr_route = rt;
  885         /* TODO: link from path route to gate route */
  886         MESH_RT_UNLOCK(ms);
  887 
  888         return gr;
  889 }
  890 
  891 
  892 /*
  893  * Helper function to note the Mesh Peer Link FSM change.
  894  */
  895 static void
  896 mesh_linkchange(struct ieee80211_node *ni, enum ieee80211_mesh_mlstate state)
  897 {
  898         struct ieee80211vap *vap = ni->ni_vap;
  899         struct ieee80211_mesh_state *ms = vap->iv_mesh;
  900 #ifdef IEEE80211_DEBUG
  901         static const char *meshlinkstates[] = {
  902                 [IEEE80211_NODE_MESH_IDLE]              = "IDLE",
  903                 [IEEE80211_NODE_MESH_OPENSNT]           = "OPEN SENT",
  904                 [IEEE80211_NODE_MESH_OPENRCV]           = "OPEN RECEIVED",
  905                 [IEEE80211_NODE_MESH_CONFIRMRCV]        = "CONFIRM RECEIVED",
  906                 [IEEE80211_NODE_MESH_ESTABLISHED]       = "ESTABLISHED",
  907                 [IEEE80211_NODE_MESH_HOLDING]           = "HOLDING"
  908         };
  909 #endif
  910         IEEE80211_NOTE(vap, IEEE80211_MSG_MESH,
  911             ni, "peer link: %s -> %s",
  912             meshlinkstates[ni->ni_mlstate], meshlinkstates[state]);
  913 
  914         /* track neighbor count */
  915         if (state == IEEE80211_NODE_MESH_ESTABLISHED &&
  916             ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) {
  917                 KASSERT(ms->ms_neighbors < 65535, ("neighbor count overflow"));
  918                 ms->ms_neighbors++;
  919                 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF);
  920         } else if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED &&
  921             state != IEEE80211_NODE_MESH_ESTABLISHED) {
  922                 KASSERT(ms->ms_neighbors > 0, ("neighbor count 0"));
  923                 ms->ms_neighbors--;
  924                 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF);
  925         }
  926         ni->ni_mlstate = state;
  927         switch (state) {
  928         case IEEE80211_NODE_MESH_HOLDING:
  929                 ms->ms_ppath->mpp_peerdown(ni);
  930                 break;
  931         case IEEE80211_NODE_MESH_ESTABLISHED:
  932                 ieee80211_mesh_discover(vap, ni->ni_macaddr, NULL);
  933                 break;
  934         default:
  935                 break;
  936         }
  937 }
  938 
  939 /*
  940  * Helper function to generate a unique local ID required for mesh
  941  * peer establishment.
  942  */
  943 static void
  944 mesh_checkid(void *arg, struct ieee80211_node *ni)
  945 {
  946         uint16_t *r = arg;
  947         
  948         if (*r == ni->ni_mllid)
  949                 *(uint16_t *)arg = 0;
  950 }
  951 
  952 static uint32_t
  953 mesh_generateid(struct ieee80211vap *vap)
  954 {
  955         int maxiter = 4;
  956         uint16_t r;
  957 
  958         do {
  959                 get_random_bytes(&r, 2);
  960                 ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_checkid, &r);
  961                 maxiter--;
  962         } while (r == 0 && maxiter > 0);
  963         return r;
  964 }
  965 
  966 /*
  967  * Verifies if we already received this packet by checking its
  968  * sequence number.
  969  * Returns 0 if the frame is to be accepted, 1 otherwise.
  970  */
  971 static int
  972 mesh_checkpseq(struct ieee80211vap *vap,
  973     const uint8_t source[IEEE80211_ADDR_LEN], uint32_t seq)
  974 {
  975         struct ieee80211_mesh_route *rt;
  976 
  977         rt = ieee80211_mesh_rt_find(vap, source);
  978         if (rt == NULL) {
  979                 rt = ieee80211_mesh_rt_add(vap, source);
  980                 if (rt == NULL) {
  981                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source,
  982                             "%s", "add mcast route failed");
  983                         vap->iv_stats.is_mesh_rtaddfailed++;
  984                         return 1;
  985                 }
  986                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source,
  987                     "add mcast route, mesh seqno %d", seq);
  988                 rt->rt_lastmseq = seq;
  989                 return 0;
  990         }
  991         if (IEEE80211_MESH_SEQ_GEQ(rt->rt_lastmseq, seq)) {
  992                 return 1;
  993         } else {
  994                 rt->rt_lastmseq = seq;
  995                 return 0;
  996         }
  997 }
  998 
  999 /*
 1000  * Iterate the routing table and locate the next hop.
 1001  */
 1002 struct ieee80211_node *
 1003 ieee80211_mesh_find_txnode(struct ieee80211vap *vap,
 1004     const uint8_t dest[IEEE80211_ADDR_LEN])
 1005 {
 1006         struct ieee80211_mesh_route *rt;
 1007 
 1008         rt = ieee80211_mesh_rt_find(vap, dest);
 1009         if (rt == NULL)
 1010                 return NULL;
 1011         if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) {
 1012                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
 1013                     "%s: !valid, flags 0x%x", __func__, rt->rt_flags);
 1014                 /* XXX stat */
 1015                 return NULL;
 1016         }
 1017         if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) {
 1018                 rt = ieee80211_mesh_rt_find(vap, rt->rt_mesh_gate);
 1019                 if (rt == NULL) return NULL;
 1020                 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) {
 1021                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
 1022                             "%s: meshgate !valid, flags 0x%x", __func__,
 1023                             rt->rt_flags);
 1024                         /* XXX stat */
 1025                         return NULL;
 1026                 }
 1027         }
 1028         return ieee80211_find_txnode(vap, rt->rt_nexthop);
 1029 }
 1030 
 1031 static void
 1032 mesh_transmit_to_gate(struct ieee80211vap *vap, struct mbuf *m,
 1033     struct ieee80211_mesh_route *rt_gate)
 1034 {
 1035         struct ifnet *ifp = vap->iv_ifp;
 1036         struct ieee80211_node *ni;
 1037 
 1038         IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
 1039 
 1040         ni = ieee80211_mesh_find_txnode(vap, rt_gate->rt_dest);
 1041         if (ni == NULL) {
 1042                 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
 1043                 m_freem(m);
 1044                 return;
 1045         }
 1046 
 1047         /*
 1048          * Send through the VAP packet transmit path.
 1049          * This consumes the node ref grabbed above and
 1050          * the mbuf, regardless of whether there's a problem
 1051          * or not.
 1052          */
 1053         (void) ieee80211_vap_pkt_send_dest(vap, m, ni);
 1054 }
 1055 
 1056 /*
 1057  * Forward the queued frames to known valid mesh gates.
 1058  * Assume destination to be outside the MBSS (i.e. proxy entry),
 1059  * If no valid mesh gates are known silently discard queued frames.
 1060  * After transmitting frames to all known valid mesh gates, this route
 1061  * will be marked invalid, and a new path discovery will happen in the hopes
 1062  * that (at least) one of the mesh gates have a new proxy entry for us to use.
 1063  */
 1064 void
 1065 ieee80211_mesh_forward_to_gates(struct ieee80211vap *vap,
 1066     struct ieee80211_mesh_route *rt_dest)
 1067 {
 1068         struct ieee80211com *ic = vap->iv_ic;
 1069         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 1070         struct ieee80211_mesh_route *rt_gate;
 1071         struct ieee80211_mesh_gate_route *gr = NULL, *gr_next;
 1072         struct mbuf *m, *mcopy, *next;
 1073 
 1074         IEEE80211_TX_UNLOCK_ASSERT(ic);
 1075 
 1076         KASSERT( rt_dest->rt_flags == IEEE80211_MESHRT_FLAGS_DISCOVER,
 1077             ("Route is not marked with IEEE80211_MESHRT_FLAGS_DISCOVER"));
 1078 
 1079         /* XXX: send to more than one valid mash gate */
 1080         MESH_RT_LOCK(ms);
 1081 
 1082         m = ieee80211_ageq_remove(&ic->ic_stageq,
 1083             (struct ieee80211_node *)(uintptr_t)
 1084             ieee80211_mac_hash(ic, rt_dest->rt_dest));
 1085 
 1086         TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, gr_next) {
 1087                 rt_gate = gr->gr_route;
 1088                 if (rt_gate == NULL) {
 1089                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP,
 1090                                 rt_dest->rt_dest,
 1091                                 "mesh gate with no path %6D",
 1092                                 gr->gr_addr, ":");
 1093                         continue;
 1094                 }
 1095                 if ((rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0)
 1096                         continue;
 1097                 KASSERT(rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_GATE,
 1098                     ("route not marked as a mesh gate"));
 1099                 KASSERT((rt_gate->rt_flags &
 1100                         IEEE80211_MESHRT_FLAGS_PROXY) == 0,
 1101                         ("found mesh gate that is also marked porxy"));
 1102                 /*
 1103                  * convert route to a proxy route gated by the current
 1104                  * mesh gate, this is needed so encap can built data
 1105                  * frame with correct address.
 1106                  */
 1107                 rt_dest->rt_flags = IEEE80211_MESHRT_FLAGS_PROXY |
 1108                         IEEE80211_MESHRT_FLAGS_VALID;
 1109                 rt_dest->rt_ext_seq = 1; /* random value */
 1110                 IEEE80211_ADDR_COPY(rt_dest->rt_mesh_gate, rt_gate->rt_dest);
 1111                 IEEE80211_ADDR_COPY(rt_dest->rt_nexthop, rt_gate->rt_nexthop);
 1112                 rt_dest->rt_metric = rt_gate->rt_metric;
 1113                 rt_dest->rt_nhops = rt_gate->rt_nhops;
 1114                 ieee80211_mesh_rt_update(rt_dest, ms->ms_ppath->mpp_inact);
 1115                 MESH_RT_UNLOCK(ms);
 1116                 /* XXX: lock?? */
 1117                 mcopy = m_dup(m, M_NOWAIT);
 1118                 for (; mcopy != NULL; mcopy = next) {
 1119                         next = mcopy->m_nextpkt;
 1120                         mcopy->m_nextpkt = NULL;
 1121                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP,
 1122                             rt_dest->rt_dest,
 1123                             "flush queued frame %p len %d", mcopy,
 1124                             mcopy->m_pkthdr.len);
 1125                         mesh_transmit_to_gate(vap, mcopy, rt_gate);
 1126                 }
 1127                 MESH_RT_LOCK(ms);
 1128         }
 1129         rt_dest->rt_flags = 0; /* Mark invalid */
 1130         m_freem(m);
 1131         MESH_RT_UNLOCK(ms);
 1132 }
 1133 
 1134 /*
 1135  * Forward the specified frame.
 1136  * Decrement the TTL and set TA to our MAC address.
 1137  */
 1138 static void
 1139 mesh_forward(struct ieee80211vap *vap, struct mbuf *m,
 1140     const struct ieee80211_meshcntl *mc)
 1141 {
 1142         struct ieee80211com *ic = vap->iv_ic;
 1143         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 1144         struct ifnet *ifp = vap->iv_ifp;
 1145         const struct ieee80211_frame *wh =
 1146             mtod(m, const struct ieee80211_frame *);
 1147         struct mbuf *mcopy;
 1148         struct ieee80211_meshcntl *mccopy;
 1149         struct ieee80211_frame *whcopy;
 1150         struct ieee80211_node *ni;
 1151         int err;
 1152 
 1153         /* This is called from the RX path - don't hold this lock */
 1154         IEEE80211_TX_UNLOCK_ASSERT(ic);
 1155 
 1156         /*
 1157          * mesh ttl of 1 means we are the last one receiving it,
 1158          * according to amendment we decrement and then check if
 1159          * 0, if so we dont forward.
 1160          */
 1161         if (mc->mc_ttl < 1) {
 1162                 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
 1163                     "%s", "frame not fwd'd, ttl 1");
 1164                 vap->iv_stats.is_mesh_fwd_ttl++;
 1165                 return;
 1166         }
 1167         if (!(ms->ms_flags & IEEE80211_MESHFLAGS_FWD)) {
 1168                 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
 1169                     "%s", "frame not fwd'd, fwding disabled");
 1170                 vap->iv_stats.is_mesh_fwd_disabled++;
 1171                 return;
 1172         }
 1173         mcopy = m_dup(m, M_NOWAIT);
 1174         if (mcopy == NULL) {
 1175                 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
 1176                     "%s", "frame not fwd'd, cannot dup");
 1177                 vap->iv_stats.is_mesh_fwd_nobuf++;
 1178                 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
 1179                 return;
 1180         }
 1181         mcopy = m_pullup(mcopy, ieee80211_hdrspace(ic, wh) +
 1182             sizeof(struct ieee80211_meshcntl));
 1183         if (mcopy == NULL) {
 1184                 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
 1185                     "%s", "frame not fwd'd, too short");
 1186                 vap->iv_stats.is_mesh_fwd_tooshort++;
 1187                 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
 1188                 m_freem(mcopy);
 1189                 return;
 1190         }
 1191         whcopy = mtod(mcopy, struct ieee80211_frame *);
 1192         mccopy = (struct ieee80211_meshcntl *)
 1193             (mtod(mcopy, uint8_t *) + ieee80211_hdrspace(ic, wh));
 1194         /* XXX clear other bits? */
 1195         whcopy->i_fc[1] &= ~IEEE80211_FC1_RETRY;
 1196         IEEE80211_ADDR_COPY(whcopy->i_addr2, vap->iv_myaddr);
 1197         if (IEEE80211_IS_MULTICAST(wh->i_addr1)) {
 1198                 ni = ieee80211_ref_node(vap->iv_bss);
 1199                 mcopy->m_flags |= M_MCAST;
 1200         } else {
 1201                 ni = ieee80211_mesh_find_txnode(vap, whcopy->i_addr3);
 1202                 if (ni == NULL) {
 1203                         /*
 1204                          * [Optional] any of the following three actions:
 1205                          * o silently discard
 1206                          * o trigger a path discovery
 1207                          * o inform TA that meshDA is unknown.
 1208                          */
 1209                         IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
 1210                             "%s", "frame not fwd'd, no path");
 1211                         ms->ms_ppath->mpp_senderror(vap, whcopy->i_addr3, NULL,
 1212                             IEEE80211_REASON_MESH_PERR_NO_FI);
 1213                         vap->iv_stats.is_mesh_fwd_nopath++;
 1214                         m_freem(mcopy);
 1215                         return;
 1216                 }
 1217                 IEEE80211_ADDR_COPY(whcopy->i_addr1, ni->ni_macaddr);
 1218         }
 1219         KASSERT(mccopy->mc_ttl > 0, ("%s called with wrong ttl", __func__));
 1220         mccopy->mc_ttl--;
 1221 
 1222         /* XXX calculate priority so drivers can find the tx queue */
 1223         M_WME_SETAC(mcopy, WME_AC_BE);
 1224 
 1225         /* XXX do we know m_nextpkt is NULL? */
 1226         mcopy->m_pkthdr.rcvif = (void *) ni;
 1227 
 1228         /*
 1229          * XXX this bypasses all of the VAP TX handling; it passes frames
 1230          * directly to the parent interface.
 1231          *
 1232          * Because of this, there's no TX lock being held as there's no
 1233          * encaps state being used.
 1234          *
 1235          * Doing a direct parent transmit may not be the correct thing
 1236          * to do here; we'll have to re-think this soon.
 1237          */
 1238         IEEE80211_TX_LOCK(ic);
 1239         err = ieee80211_parent_xmitpkt(ic, mcopy);
 1240         IEEE80211_TX_UNLOCK(ic);
 1241         if (!err)
 1242                 if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1);
 1243 }
 1244 
 1245 static struct mbuf *
 1246 mesh_decap(struct ieee80211vap *vap, struct mbuf *m, int hdrlen, int meshdrlen)
 1247 {
 1248 #define WHDIR(wh)       ((wh)->i_fc[1] & IEEE80211_FC1_DIR_MASK)
 1249 #define MC01(mc)        ((const struct ieee80211_meshcntl_ae01 *)mc)
 1250         uint8_t b[sizeof(struct ieee80211_qosframe_addr4) +
 1251                   sizeof(struct ieee80211_meshcntl_ae10)];
 1252         const struct ieee80211_qosframe_addr4 *wh;
 1253         const struct ieee80211_meshcntl_ae10 *mc;
 1254         struct ether_header *eh;
 1255         struct llc *llc;
 1256         int ae;
 1257 
 1258         if (m->m_len < hdrlen + sizeof(*llc) &&
 1259             (m = m_pullup(m, hdrlen + sizeof(*llc))) == NULL) {
 1260                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ANY,
 1261                     "discard data frame: %s", "m_pullup failed");
 1262                 vap->iv_stats.is_rx_tooshort++;
 1263                 return NULL;
 1264         }
 1265         memcpy(b, mtod(m, caddr_t), hdrlen);
 1266         wh = (const struct ieee80211_qosframe_addr4 *)&b[0];
 1267         mc = (const struct ieee80211_meshcntl_ae10 *)&b[hdrlen - meshdrlen];
 1268         KASSERT(WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS ||
 1269                 WHDIR(wh) == IEEE80211_FC1_DIR_DSTODS,
 1270             ("bogus dir, fc 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1]));
 1271 
 1272         llc = (struct llc *)(mtod(m, caddr_t) + hdrlen);
 1273         if (llc->llc_dsap == LLC_SNAP_LSAP && llc->llc_ssap == LLC_SNAP_LSAP &&
 1274             llc->llc_control == LLC_UI && llc->llc_snap.org_code[0] == 0 &&
 1275             llc->llc_snap.org_code[1] == 0 && llc->llc_snap.org_code[2] == 0 &&
 1276             /* NB: preserve AppleTalk frames that have a native SNAP hdr */
 1277             !(llc->llc_snap.ether_type == htons(ETHERTYPE_AARP) ||
 1278               llc->llc_snap.ether_type == htons(ETHERTYPE_IPX))) {
 1279                 m_adj(m, hdrlen + sizeof(struct llc) - sizeof(*eh));
 1280                 llc = NULL;
 1281         } else {
 1282                 m_adj(m, hdrlen - sizeof(*eh));
 1283         }
 1284         eh = mtod(m, struct ether_header *);
 1285         ae = mc->mc_flags & IEEE80211_MESH_AE_MASK;
 1286         if (WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS) {
 1287                 IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr1);
 1288                 if (ae == IEEE80211_MESH_AE_00) {
 1289                         IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr3);
 1290                 } else if (ae == IEEE80211_MESH_AE_01) {
 1291                         IEEE80211_ADDR_COPY(eh->ether_shost,
 1292                             MC01(mc)->mc_addr4);
 1293                 } else {
 1294                         IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
 1295                             (const struct ieee80211_frame *)wh, NULL,
 1296                             "bad AE %d", ae);
 1297                         vap->iv_stats.is_mesh_badae++;
 1298                         m_freem(m);
 1299                         return NULL;
 1300                 }
 1301         } else {
 1302                 if (ae == IEEE80211_MESH_AE_00) {
 1303                         IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr3);
 1304                         IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr4);
 1305                 } else if (ae == IEEE80211_MESH_AE_10) {
 1306                         IEEE80211_ADDR_COPY(eh->ether_dhost, mc->mc_addr5);
 1307                         IEEE80211_ADDR_COPY(eh->ether_shost, mc->mc_addr6);
 1308                 } else {
 1309                         IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
 1310                             (const struct ieee80211_frame *)wh, NULL,
 1311                             "bad AE %d", ae);
 1312                         vap->iv_stats.is_mesh_badae++;
 1313                         m_freem(m);
 1314                         return NULL;
 1315                 }
 1316         }
 1317 #ifndef __NO_STRICT_ALIGNMENT
 1318         if (!ALIGNED_POINTER(mtod(m, caddr_t) + sizeof(*eh), uint32_t)) {
 1319                 m = ieee80211_realign(vap, m, sizeof(*eh));
 1320                 if (m == NULL)
 1321                         return NULL;
 1322         }
 1323 #endif /* !__NO_STRICT_ALIGNMENT */
 1324         if (llc != NULL) {
 1325                 eh = mtod(m, struct ether_header *);
 1326                 eh->ether_type = htons(m->m_pkthdr.len - sizeof(*eh));
 1327         }
 1328         return m;
 1329 #undef  WDIR
 1330 #undef  MC01
 1331 }
 1332 
 1333 /*
 1334  * Return non-zero if the unicast mesh data frame should be processed
 1335  * locally.  Frames that are not proxy'd have our address, otherwise
 1336  * we need to consult the routing table to look for a proxy entry.
 1337  */
 1338 static __inline int
 1339 mesh_isucastforme(struct ieee80211vap *vap, const struct ieee80211_frame *wh,
 1340     const struct ieee80211_meshcntl *mc)
 1341 {
 1342         int ae = mc->mc_flags & 3;
 1343 
 1344         KASSERT((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) == IEEE80211_FC1_DIR_DSTODS,
 1345             ("bad dir 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1]));
 1346         KASSERT(ae == IEEE80211_MESH_AE_00 || ae == IEEE80211_MESH_AE_10,
 1347             ("bad AE %d", ae));
 1348         if (ae == IEEE80211_MESH_AE_10) {       /* ucast w/ proxy */
 1349                 const struct ieee80211_meshcntl_ae10 *mc10 =
 1350                     (const struct ieee80211_meshcntl_ae10 *) mc;
 1351                 struct ieee80211_mesh_route *rt =
 1352                     ieee80211_mesh_rt_find(vap, mc10->mc_addr5);
 1353                 /* check for proxy route to ourself */
 1354                 return (rt != NULL &&
 1355                     (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY));
 1356         } else                                  /* ucast w/o proxy */
 1357                 return IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_myaddr);
 1358 }
 1359 
 1360 /*
 1361  * Verifies transmitter, updates lifetime, precursor list and forwards data.
 1362  * > 0 means we have forwarded data and no need to process locally
 1363  * == 0 means we want to process locally (and we may have forwarded data
 1364  * < 0 means there was an error and data should be discarded
 1365  */
 1366 static int
 1367 mesh_recv_indiv_data_to_fwrd(struct ieee80211vap *vap, struct mbuf *m,
 1368     struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc)
 1369 {
 1370         struct ieee80211_qosframe_addr4 *qwh;
 1371         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 1372         struct ieee80211_mesh_route *rt_meshda, *rt_meshsa;
 1373 
 1374         /* This is called from the RX path - don't hold this lock */
 1375         IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
 1376 
 1377         qwh = (struct ieee80211_qosframe_addr4 *)wh;
 1378 
 1379         /*
 1380          * TODO:
 1381          * o verify addr2 is  a legitimate transmitter
 1382          * o lifetime of precursor of addr3 (addr2) is max(init, curr)
 1383          * o lifetime of precursor of addr4 (nexthop) is max(init, curr)
 1384          */
 1385 
 1386         /* set lifetime of addr3 (meshDA) to initial value */
 1387         rt_meshda = ieee80211_mesh_rt_find(vap, qwh->i_addr3);
 1388         if (rt_meshda == NULL) {
 1389                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, qwh->i_addr2,
 1390                     "no route to meshDA(%6D)", qwh->i_addr3, ":");
 1391                 /*
 1392                  * [Optional] any of the following three actions:
 1393                  * o silently discard                           [X]
 1394                  * o trigger a path discovery                   [ ]
 1395                  * o inform TA that meshDA is unknown.          [ ]
 1396                  */
 1397                 /* XXX: stats */
 1398                 return (-1);
 1399         }
 1400 
 1401         ieee80211_mesh_rt_update(rt_meshda, ticks_to_msecs(
 1402             ms->ms_ppath->mpp_inact));
 1403 
 1404         /* set lifetime of addr4 (meshSA) to initial value */
 1405         rt_meshsa = ieee80211_mesh_rt_find(vap, qwh->i_addr4);
 1406         KASSERT(rt_meshsa != NULL, ("no route"));
 1407         ieee80211_mesh_rt_update(rt_meshsa, ticks_to_msecs(
 1408             ms->ms_ppath->mpp_inact));
 1409 
 1410         mesh_forward(vap, m, mc);
 1411         return (1); /* dont process locally */
 1412 }
 1413 
 1414 /*
 1415  * Verifies transmitter, updates lifetime, precursor list and process data
 1416  * locally, if data is proxy with AE = 10 it could mean data should go
 1417  * on another mesh path or data should be forwarded to the DS.
 1418  *
 1419  * > 0 means we have forwarded data and no need to process locally
 1420  * == 0 means we want to process locally (and we may have forwarded data
 1421  * < 0 means there was an error and data should be discarded
 1422  */
 1423 static int
 1424 mesh_recv_indiv_data_to_me(struct ieee80211vap *vap, struct mbuf *m,
 1425     struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc)
 1426 {
 1427         struct ieee80211_qosframe_addr4 *qwh;
 1428         const struct ieee80211_meshcntl_ae10 *mc10;
 1429         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 1430         struct ieee80211_mesh_route *rt;
 1431         int ae;
 1432 
 1433         /* This is called from the RX path - don't hold this lock */
 1434         IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
 1435 
 1436         qwh = (struct ieee80211_qosframe_addr4 *)wh;
 1437         mc10 = (const struct ieee80211_meshcntl_ae10 *)mc;
 1438 
 1439         /*
 1440          * TODO:
 1441          * o verify addr2 is  a legitimate transmitter
 1442          * o lifetime of precursor entry is max(init, curr)
 1443          */
 1444 
 1445         /* set lifetime of addr4 (meshSA) to initial value */
 1446         rt = ieee80211_mesh_rt_find(vap, qwh->i_addr4);
 1447         KASSERT(rt != NULL, ("no route"));
 1448         ieee80211_mesh_rt_update(rt, ticks_to_msecs(ms->ms_ppath->mpp_inact));
 1449         rt = NULL;
 1450 
 1451         ae = mc10->mc_flags & IEEE80211_MESH_AE_MASK;
 1452         KASSERT(ae == IEEE80211_MESH_AE_00 ||
 1453             ae == IEEE80211_MESH_AE_10, ("bad AE %d", ae));
 1454         if (ae == IEEE80211_MESH_AE_10) {
 1455                 if (IEEE80211_ADDR_EQ(mc10->mc_addr5, qwh->i_addr3)) {
 1456                         return (0); /* process locally */
 1457                 }
 1458 
 1459                 rt =  ieee80211_mesh_rt_find(vap, mc10->mc_addr5);
 1460                 if (rt != NULL &&
 1461                     (rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) &&
 1462                     (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) == 0) {
 1463                         /*
 1464                          * Forward on another mesh-path, according to
 1465                          * amendment as specified in 9.32.4.1
 1466                          */
 1467                         IEEE80211_ADDR_COPY(qwh->i_addr3, mc10->mc_addr5);
 1468                         mesh_forward(vap, m,
 1469                             (const struct ieee80211_meshcntl *)mc10);
 1470                         return (1); /* dont process locally */
 1471                 }
 1472                 /*
 1473                  * All other cases: forward of MSDUs from the MBSS to DS indiv.
 1474                  * addressed according to 13.11.3.2.
 1475                  */
 1476                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, qwh->i_addr2,
 1477                     "forward frame to DS, SA(%6D) DA(%6D)",
 1478                     mc10->mc_addr6, ":", mc10->mc_addr5, ":");
 1479         }
 1480         return (0); /* process locally */
 1481 }
 1482 
 1483 /*
 1484  * Try to forward the group addressed data on to other mesh STAs, and
 1485  * also to the DS.
 1486  *
 1487  * > 0 means we have forwarded data and no need to process locally
 1488  * == 0 means we want to process locally (and we may have forwarded data
 1489  * < 0 means there was an error and data should be discarded
 1490  */
 1491 static int
 1492 mesh_recv_group_data(struct ieee80211vap *vap, struct mbuf *m,
 1493     struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc)
 1494 {
 1495 #define MC01(mc)        ((const struct ieee80211_meshcntl_ae01 *)mc)
 1496         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 1497 
 1498         /* This is called from the RX path - don't hold this lock */
 1499         IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
 1500 
 1501         mesh_forward(vap, m, mc);
 1502 
 1503         if(mc->mc_ttl > 0) {
 1504                 if (mc->mc_flags & IEEE80211_MESH_AE_01) {
 1505                         /*
 1506                          * Forward of MSDUs from the MBSS to DS group addressed
 1507                          * (according to 13.11.3.2)
 1508                          * This happens by delivering the packet, and a bridge
 1509                          * will sent it on another port member.
 1510                          */
 1511                         if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE &&
 1512                             ms->ms_flags & IEEE80211_MESHFLAGS_FWD) {
 1513                                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH,
 1514                                     MC01(mc)->mc_addr4, "%s",
 1515                                     "forward from MBSS to the DS");
 1516                         }
 1517                 }
 1518         }
 1519         return (0); /* process locally */
 1520 #undef  MC01
 1521 }
 1522 
 1523 static int
 1524 mesh_input(struct ieee80211_node *ni, struct mbuf *m,
 1525     const struct ieee80211_rx_stats *rxs, int rssi, int nf)
 1526 {
 1527 #define HAS_SEQ(type)   ((type & 0x4) == 0)
 1528 #define MC01(mc)        ((const struct ieee80211_meshcntl_ae01 *)mc)
 1529         struct ieee80211vap *vap = ni->ni_vap;
 1530         struct ieee80211com *ic = ni->ni_ic;
 1531         struct ifnet *ifp = vap->iv_ifp;
 1532         struct ieee80211_frame *wh;
 1533         const struct ieee80211_meshcntl *mc;
 1534         int hdrspace, meshdrlen, need_tap, error;
 1535         uint8_t dir, type, subtype, ae;
 1536         uint32_t seq;
 1537         const uint8_t *addr;
 1538         uint8_t qos[2];
 1539 
 1540         KASSERT(ni != NULL, ("null node"));
 1541         ni->ni_inact = ni->ni_inact_reload;
 1542 
 1543         need_tap = 1;                   /* mbuf need to be tapped. */
 1544         type = -1;                      /* undefined */
 1545 
 1546         /* This is called from the RX path - don't hold this lock */
 1547         IEEE80211_TX_UNLOCK_ASSERT(ic);
 1548 
 1549         if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) {
 1550                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
 1551                     ni->ni_macaddr, NULL,
 1552                     "too short (1): len %u", m->m_pkthdr.len);
 1553                 vap->iv_stats.is_rx_tooshort++;
 1554                 goto out;
 1555         }
 1556         /*
 1557          * Bit of a cheat here, we use a pointer for a 3-address
 1558          * frame format but don't reference fields past outside
 1559          * ieee80211_frame_min w/o first validating the data is
 1560          * present.
 1561         */
 1562         wh = mtod(m, struct ieee80211_frame *);
 1563 
 1564         if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) !=
 1565             IEEE80211_FC0_VERSION_0) {
 1566                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
 1567                     ni->ni_macaddr, NULL, "wrong version %x", wh->i_fc[0]);
 1568                 vap->iv_stats.is_rx_badversion++;
 1569                 goto err;
 1570         }
 1571         dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK;
 1572         type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK;
 1573         subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK;
 1574         if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) {
 1575                 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi);
 1576                 ni->ni_noise = nf;
 1577                 if (HAS_SEQ(type)) {
 1578                         uint8_t tid = ieee80211_gettid(wh);
 1579 
 1580                         if (IEEE80211_QOS_HAS_SEQ(wh) &&
 1581                             TID_TO_WME_AC(tid) >= WME_AC_VI)
 1582                                 ic->ic_wme.wme_hipri_traffic++;
 1583                         if (! ieee80211_check_rxseq(ni, wh, wh->i_addr1))
 1584                                 goto out;
 1585                 }
 1586         }
 1587 #ifdef IEEE80211_DEBUG
 1588         /*
 1589          * It's easier, but too expensive, to simulate different mesh
 1590          * topologies by consulting the ACL policy very early, so do this
 1591          * only under DEBUG.
 1592          *
 1593          * NB: this check is also done upon peering link initiation.
 1594          */
 1595         if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) {
 1596                 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL,
 1597                     wh, NULL, "%s", "disallowed by ACL");
 1598                 vap->iv_stats.is_rx_acl++;
 1599                 goto out;
 1600         }
 1601 #endif
 1602         switch (type) {
 1603         case IEEE80211_FC0_TYPE_DATA:
 1604                 if (ni == vap->iv_bss)
 1605                         goto out;
 1606                 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) {
 1607                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
 1608                             ni->ni_macaddr, NULL,
 1609                             "peer link not yet established (%d)",
 1610                             ni->ni_mlstate);
 1611                         vap->iv_stats.is_mesh_nolink++;
 1612                         goto out;
 1613                 }
 1614                 if (dir != IEEE80211_FC1_DIR_FROMDS &&
 1615                     dir != IEEE80211_FC1_DIR_DSTODS) {
 1616                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
 1617                             wh, "data", "incorrect dir 0x%x", dir);
 1618                         vap->iv_stats.is_rx_wrongdir++;
 1619                         goto err;
 1620                 }
 1621 
 1622                 /* All Mesh data frames are QoS subtype */
 1623                 if (!HAS_SEQ(type)) {
 1624                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
 1625                             wh, "data", "incorrect subtype 0x%x", subtype);
 1626                         vap->iv_stats.is_rx_badsubtype++;
 1627                         goto err;
 1628                 }
 1629 
 1630                 /*
 1631                  * Next up, any fragmentation.
 1632                  * XXX: we defrag before we even try to forward,
 1633                  * Mesh Control field is not present in sub-sequent
 1634                  * fragmented frames. This is in contrast to Draft 4.0.
 1635                  */
 1636                 hdrspace = ieee80211_hdrspace(ic, wh);
 1637                 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
 1638                         m = ieee80211_defrag(ni, m, hdrspace);
 1639                         if (m == NULL) {
 1640                                 /* Fragment dropped or frame not complete yet */
 1641                                 goto out;
 1642                         }
 1643                 }
 1644                 wh = mtod(m, struct ieee80211_frame *); /* NB: after defrag */
 1645 
 1646                 /*
 1647                  * Now we have a complete Mesh Data frame.
 1648                  */
 1649 
 1650                 /*
 1651                  * Only fromDStoDS data frames use 4 address qos frames
 1652                  * as specified in amendment. Otherwise addr4 is located
 1653                  * in the Mesh Control field and a 3 address qos frame
 1654                  * is used.
 1655                  */
 1656                 if (IEEE80211_IS_DSTODS(wh))
 1657                         *(uint16_t *)qos = *(uint16_t *)
 1658                             ((struct ieee80211_qosframe_addr4 *)wh)->i_qos;
 1659                 else
 1660                         *(uint16_t *)qos = *(uint16_t *)
 1661                             ((struct ieee80211_qosframe *)wh)->i_qos;
 1662 
 1663                 /*
 1664                  * NB: The mesh STA sets the Mesh Control Present
 1665                  * subfield to 1 in the Mesh Data frame containing
 1666                  * an unfragmented MSDU, an A-MSDU, or the first
 1667                  * fragment of an MSDU.
 1668                  * After defrag it should always be present.
 1669                  */
 1670                 if (!(qos[1] & IEEE80211_QOS_MC)) {
 1671                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
 1672                             ni->ni_macaddr, NULL,
 1673                             "%s", "Mesh control field not present");
 1674                         vap->iv_stats.is_rx_elem_missing++; /* XXX: kinda */
 1675                         goto err;
 1676                 }
 1677 
 1678                 /* pull up enough to get to the mesh control */
 1679                 if (m->m_len < hdrspace + sizeof(struct ieee80211_meshcntl) &&
 1680                     (m = m_pullup(m, hdrspace +
 1681                         sizeof(struct ieee80211_meshcntl))) == NULL) {
 1682                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
 1683                             ni->ni_macaddr, NULL,
 1684                             "data too short: expecting %u", hdrspace);
 1685                         vap->iv_stats.is_rx_tooshort++;
 1686                         goto out;               /* XXX */
 1687                 }
 1688                 /*
 1689                  * Now calculate the full extent of the headers. Note
 1690                  * mesh_decap will pull up anything we didn't get
 1691                  * above when it strips the 802.11 headers.
 1692                  */
 1693                 mc = (const struct ieee80211_meshcntl *)
 1694                     (mtod(m, const uint8_t *) + hdrspace);
 1695                 ae = mc->mc_flags & IEEE80211_MESH_AE_MASK;
 1696                 meshdrlen = sizeof(struct ieee80211_meshcntl) +
 1697                     ae * IEEE80211_ADDR_LEN;
 1698                 hdrspace += meshdrlen;
 1699 
 1700                 /* pull complete hdrspace = ieee80211_hdrspace + meshcontrol */
 1701                 if ((meshdrlen > sizeof(struct ieee80211_meshcntl)) &&
 1702                     (m->m_len < hdrspace) &&
 1703                     ((m = m_pullup(m, hdrspace)) == NULL)) {
 1704                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
 1705                             ni->ni_macaddr, NULL,
 1706                             "data too short: expecting %u", hdrspace);
 1707                         vap->iv_stats.is_rx_tooshort++;
 1708                         goto out;               /* XXX */
 1709                 }
 1710                 /* XXX: are we sure there is no reallocating after m_pullup? */
 1711 
 1712                 seq = le32dec(mc->mc_seq);
 1713                 if (IEEE80211_IS_MULTICAST(wh->i_addr1))
 1714                         addr = wh->i_addr3;
 1715                 else if (ae == IEEE80211_MESH_AE_01)
 1716                         addr = MC01(mc)->mc_addr4;
 1717                 else
 1718                         addr = ((struct ieee80211_qosframe_addr4 *)wh)->i_addr4;
 1719                 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, addr)) {
 1720                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
 1721                             addr, "data", "%s", "not to me");
 1722                         vap->iv_stats.is_rx_wrongbss++; /* XXX kinda */
 1723                         goto out;
 1724                 }
 1725                 if (mesh_checkpseq(vap, addr, seq) != 0) {
 1726                         vap->iv_stats.is_rx_dup++;
 1727                         goto out;
 1728                 }
 1729 
 1730                 /* This code "routes" the frame to the right control path */
 1731                 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
 1732                         if (IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr3))
 1733                                 error =
 1734                                     mesh_recv_indiv_data_to_me(vap, m, wh, mc);
 1735                         else if (IEEE80211_IS_MULTICAST(wh->i_addr3))
 1736                                 error = mesh_recv_group_data(vap, m, wh, mc);
 1737                         else
 1738                                 error = mesh_recv_indiv_data_to_fwrd(vap, m,
 1739                                     wh, mc);
 1740                 } else
 1741                         error = mesh_recv_group_data(vap, m, wh, mc);
 1742                 if (error < 0)
 1743                         goto err;
 1744                 else if (error > 0)
 1745                         goto out;
 1746 
 1747                 if (ieee80211_radiotap_active_vap(vap))
 1748                         ieee80211_radiotap_rx(vap, m);
 1749                 need_tap = 0;
 1750 
 1751                 /*
 1752                  * Finally, strip the 802.11 header.
 1753                  */
 1754                 m = mesh_decap(vap, m, hdrspace, meshdrlen);
 1755                 if (m == NULL) {
 1756                         /* XXX mask bit to check for both */
 1757                         /* don't count Null data frames as errors */
 1758                         if (subtype == IEEE80211_FC0_SUBTYPE_NODATA ||
 1759                             subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL)
 1760                                 goto out;
 1761                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
 1762                             ni->ni_macaddr, "data", "%s", "decap error");
 1763                         vap->iv_stats.is_rx_decap++;
 1764                         IEEE80211_NODE_STAT(ni, rx_decap);
 1765                         goto err;
 1766                 }
 1767                 if (qos[0] & IEEE80211_QOS_AMSDU) {
 1768                         m = ieee80211_decap_amsdu(ni, m);
 1769                         if (m == NULL)
 1770                                 return IEEE80211_FC0_TYPE_DATA;
 1771                 }
 1772                 ieee80211_deliver_data(vap, ni, m);
 1773                 return type;
 1774         case IEEE80211_FC0_TYPE_MGT:
 1775                 vap->iv_stats.is_rx_mgmt++;
 1776                 IEEE80211_NODE_STAT(ni, rx_mgmt);
 1777                 if (dir != IEEE80211_FC1_DIR_NODS) {
 1778                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
 1779                             wh, "mgt", "incorrect dir 0x%x", dir);
 1780                         vap->iv_stats.is_rx_wrongdir++;
 1781                         goto err;
 1782                 }
 1783                 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) {
 1784                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
 1785                             ni->ni_macaddr, "mgt", "too short: len %u",
 1786                             m->m_pkthdr.len);
 1787                         vap->iv_stats.is_rx_tooshort++;
 1788                         goto out;
 1789                 }
 1790 #ifdef IEEE80211_DEBUG
 1791                 if ((ieee80211_msg_debug(vap) && 
 1792                     (vap->iv_ic->ic_flags & IEEE80211_F_SCAN)) ||
 1793                     ieee80211_msg_dumppkts(vap)) {
 1794                         if_printf(ifp, "received %s from %s rssi %d\n",
 1795                             ieee80211_mgt_subtype_name(subtype),
 1796                             ether_sprintf(wh->i_addr2), rssi);
 1797                 }
 1798 #endif
 1799                 if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) {
 1800                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
 1801                             wh, NULL, "%s", "WEP set but not permitted");
 1802                         vap->iv_stats.is_rx_mgtdiscard++; /* XXX */
 1803                         goto out;
 1804                 }
 1805                 vap->iv_recv_mgmt(ni, m, subtype, rxs, rssi, nf);
 1806                 goto out;
 1807         case IEEE80211_FC0_TYPE_CTL:
 1808                 vap->iv_stats.is_rx_ctl++;
 1809                 IEEE80211_NODE_STAT(ni, rx_ctrl);
 1810                 goto out;
 1811         default:
 1812                 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
 1813                     wh, "bad", "frame type 0x%x", type);
 1814                 /* should not come here */
 1815                 break;
 1816         }
 1817 err:
 1818         if_inc_counter(ifp, IFCOUNTER_IERRORS, 1);
 1819 out:
 1820         if (m != NULL) {
 1821                 if (need_tap && ieee80211_radiotap_active_vap(vap))
 1822                         ieee80211_radiotap_rx(vap, m);
 1823                 m_freem(m);
 1824         }
 1825         return type;
 1826 #undef  HAS_SEQ
 1827 #undef  MC01
 1828 }
 1829 
 1830 static void
 1831 mesh_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, int subtype,
 1832     const struct ieee80211_rx_stats *rxs, int rssi, int nf)
 1833 {
 1834         struct ieee80211vap *vap = ni->ni_vap;
 1835         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 1836         struct ieee80211com *ic = ni->ni_ic;
 1837         struct ieee80211_channel *rxchan = ic->ic_curchan;
 1838         struct ieee80211_frame *wh;
 1839         struct ieee80211_mesh_route *rt;
 1840         uint8_t *frm, *efrm;
 1841 
 1842         wh = mtod(m0, struct ieee80211_frame *);
 1843         frm = (uint8_t *)&wh[1];
 1844         efrm = mtod(m0, uint8_t *) + m0->m_len;
 1845         switch (subtype) {
 1846         case IEEE80211_FC0_SUBTYPE_PROBE_RESP:
 1847         case IEEE80211_FC0_SUBTYPE_BEACON:
 1848         {
 1849                 struct ieee80211_scanparams scan;
 1850                 struct ieee80211_channel *c;
 1851                 /*
 1852                  * We process beacon/probe response
 1853                  * frames to discover neighbors.
 1854                  */
 1855                 if (rxs != NULL) {
 1856                         c = ieee80211_lookup_channel_rxstatus(vap, rxs);
 1857                         if (c != NULL)
 1858                                 rxchan = c;
 1859                 }
 1860                 if (ieee80211_parse_beacon(ni, m0, rxchan, &scan) != 0)
 1861                         return;
 1862                 /*
 1863                  * Count frame now that we know it's to be processed.
 1864                  */
 1865                 if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) {
 1866                         vap->iv_stats.is_rx_beacon++;   /* XXX remove */
 1867                         IEEE80211_NODE_STAT(ni, rx_beacons);
 1868                 } else
 1869                         IEEE80211_NODE_STAT(ni, rx_proberesp);
 1870                 /*
 1871                  * If scanning, just pass information to the scan module.
 1872                  */
 1873                 if (ic->ic_flags & IEEE80211_F_SCAN) {
 1874                         if (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN) {
 1875                                 /*
 1876                                  * Actively scanning a channel marked passive;
 1877                                  * send a probe request now that we know there
 1878                                  * is 802.11 traffic present.
 1879                                  *
 1880                                  * XXX check if the beacon we recv'd gives
 1881                                  * us what we need and suppress the probe req
 1882                                  */
 1883                                 ieee80211_probe_curchan(vap, 1);
 1884                                 ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN;
 1885                         }
 1886                         ieee80211_add_scan(vap, rxchan, &scan, wh,
 1887                             subtype, rssi, nf);
 1888                         return;
 1889                 }
 1890 
 1891                 /* The rest of this code assumes we are running */
 1892                 if (vap->iv_state != IEEE80211_S_RUN)
 1893                         return;
 1894                 /*
 1895                  * Ignore non-mesh STAs.
 1896                  */
 1897                 if ((scan.capinfo &
 1898                      (IEEE80211_CAPINFO_ESS|IEEE80211_CAPINFO_IBSS)) ||
 1899                     scan.meshid == NULL || scan.meshconf == NULL) {
 1900                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
 1901                             wh, "beacon", "%s", "not a mesh sta");
 1902                         vap->iv_stats.is_mesh_wrongmesh++;
 1903                         return;
 1904                 }
 1905                 /*
 1906                  * Ignore STAs for other mesh networks.
 1907                  */
 1908                 if (memcmp(scan.meshid+2, ms->ms_id, ms->ms_idlen) != 0 ||
 1909                     mesh_verify_meshconf(vap, scan.meshconf)) {
 1910                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
 1911                             wh, "beacon", "%s", "not for our mesh");
 1912                         vap->iv_stats.is_mesh_wrongmesh++;
 1913                         return;
 1914                 }
 1915                 /*
 1916                  * Peer only based on the current ACL policy.
 1917                  */
 1918                 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) {
 1919                         IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL,
 1920                             wh, NULL, "%s", "disallowed by ACL");
 1921                         vap->iv_stats.is_rx_acl++;
 1922                         return;
 1923                 }
 1924                 /*
 1925                  * Do neighbor discovery.
 1926                  */
 1927                 if (!IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_macaddr)) {
 1928                         /*
 1929                          * Create a new entry in the neighbor table.
 1930                          */
 1931                         ni = ieee80211_add_neighbor(vap, wh, &scan);
 1932                 }
 1933                 /*
 1934                  * Automatically peer with discovered nodes if possible.
 1935                  */
 1936                 if (ni != vap->iv_bss &&
 1937                     (ms->ms_flags & IEEE80211_MESHFLAGS_AP)) {
 1938                         switch (ni->ni_mlstate) {
 1939                         case IEEE80211_NODE_MESH_IDLE:
 1940                         {
 1941                                 uint16_t args[1];
 1942 
 1943                                 /* Wait for backoff callout to reset counter */
 1944                                 if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding)
 1945                                         return;
 1946 
 1947                                 ni->ni_mlpid = mesh_generateid(vap);
 1948                                 if (ni->ni_mlpid == 0)
 1949                                         return;
 1950                                 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENSNT);
 1951                                 args[0] = ni->ni_mlpid;
 1952                                 ieee80211_send_action(ni,
 1953                                 IEEE80211_ACTION_CAT_SELF_PROT,
 1954                                 IEEE80211_ACTION_MESHPEERING_OPEN, args);
 1955                                 ni->ni_mlrcnt = 0;
 1956                                 mesh_peer_timeout_setup(ni);
 1957                                 break;
 1958                         }
 1959                         case IEEE80211_NODE_MESH_ESTABLISHED:
 1960                         {
 1961                                 /*
 1962                                  * Valid beacon from a peer mesh STA
 1963                                  * bump TA lifetime
 1964                                  */
 1965                                 rt = ieee80211_mesh_rt_find(vap, wh->i_addr2);
 1966                                 if(rt != NULL) {
 1967                                         ieee80211_mesh_rt_update(rt,
 1968                                             ticks_to_msecs(
 1969                                             ms->ms_ppath->mpp_inact));
 1970                                 }
 1971                                 break;
 1972                         }
 1973                         default:
 1974                                 break; /* ignore */
 1975                         }
 1976                 }
 1977                 break;
 1978         }
 1979         case IEEE80211_FC0_SUBTYPE_PROBE_REQ:
 1980         {
 1981                 uint8_t *ssid, *meshid, *rates, *xrates;
 1982 
 1983                 if (vap->iv_state != IEEE80211_S_RUN) {
 1984                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
 1985                             wh, NULL, "wrong state %s",
 1986                             ieee80211_state_name[vap->iv_state]);
 1987                         vap->iv_stats.is_rx_mgtdiscard++;
 1988                         return;
 1989                 }
 1990                 if (IEEE80211_IS_MULTICAST(wh->i_addr2)) {
 1991                         /* frame must be directed */
 1992                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
 1993                             wh, NULL, "%s", "not unicast");
 1994                         vap->iv_stats.is_rx_mgtdiscard++;       /* XXX stat */
 1995                         return;
 1996                 }
 1997                 /*
 1998                  * prreq frame format
 1999                  *      [tlv] ssid
 2000                  *      [tlv] supported rates
 2001                  *      [tlv] extended supported rates
 2002                  *      [tlv] mesh id
 2003                  */
 2004                 ssid = meshid = rates = xrates = NULL;
 2005                 while (efrm - frm > 1) {
 2006                         IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return);
 2007                         switch (*frm) {
 2008                         case IEEE80211_ELEMID_SSID:
 2009                                 ssid = frm;
 2010                                 break;
 2011                         case IEEE80211_ELEMID_RATES:
 2012                                 rates = frm;
 2013                                 break;
 2014                         case IEEE80211_ELEMID_XRATES:
 2015                                 xrates = frm;
 2016                                 break;
 2017                         case IEEE80211_ELEMID_MESHID:
 2018                                 meshid = frm;
 2019                                 break;
 2020                         }
 2021                         frm += frm[1] + 2;
 2022                 }
 2023                 IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return);
 2024                 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return);
 2025                 if (xrates != NULL)
 2026                         IEEE80211_VERIFY_ELEMENT(xrates,
 2027                             IEEE80211_RATE_MAXSIZE - rates[1], return);
 2028                 if (meshid != NULL) {
 2029                         IEEE80211_VERIFY_ELEMENT(meshid,
 2030                             IEEE80211_MESHID_LEN, return);
 2031                         /* NB: meshid, not ssid */
 2032                         IEEE80211_VERIFY_SSID(vap->iv_bss, meshid, return);
 2033                 }
 2034 
 2035                 /* XXX find a better class or define it's own */
 2036                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_INPUT, wh->i_addr2,
 2037                     "%s", "recv probe req");
 2038                 /*
 2039                  * Some legacy 11b clients cannot hack a complete
 2040                  * probe response frame.  When the request includes
 2041                  * only a bare-bones rate set, communicate this to
 2042                  * the transmit side.
 2043                  */
 2044                 ieee80211_send_proberesp(vap, wh->i_addr2, 0);
 2045                 break;
 2046         }
 2047 
 2048         case IEEE80211_FC0_SUBTYPE_ACTION:
 2049         case IEEE80211_FC0_SUBTYPE_ACTION_NOACK:
 2050                 if (ni == vap->iv_bss) {
 2051                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
 2052                             wh, NULL, "%s", "unknown node");
 2053                         vap->iv_stats.is_rx_mgtdiscard++;
 2054                 } else if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) &&
 2055                     !IEEE80211_IS_MULTICAST(wh->i_addr1)) {
 2056                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
 2057                             wh, NULL, "%s", "not for us");
 2058                         vap->iv_stats.is_rx_mgtdiscard++;
 2059                 } else if (vap->iv_state != IEEE80211_S_RUN) {
 2060                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
 2061                             wh, NULL, "wrong state %s",
 2062                             ieee80211_state_name[vap->iv_state]);
 2063                         vap->iv_stats.is_rx_mgtdiscard++;
 2064                 } else {
 2065                         if (ieee80211_parse_action(ni, m0) == 0)
 2066                                 (void)ic->ic_recv_action(ni, wh, frm, efrm);
 2067                 }
 2068                 break;
 2069 
 2070         case IEEE80211_FC0_SUBTYPE_ASSOC_REQ:
 2071         case IEEE80211_FC0_SUBTYPE_ASSOC_RESP:
 2072         case IEEE80211_FC0_SUBTYPE_REASSOC_REQ:
 2073         case IEEE80211_FC0_SUBTYPE_REASSOC_RESP:
 2074         case IEEE80211_FC0_SUBTYPE_TIMING_ADV:
 2075         case IEEE80211_FC0_SUBTYPE_ATIM:
 2076         case IEEE80211_FC0_SUBTYPE_DISASSOC:
 2077         case IEEE80211_FC0_SUBTYPE_AUTH:
 2078         case IEEE80211_FC0_SUBTYPE_DEAUTH:
 2079                 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
 2080                     wh, NULL, "%s", "not handled");
 2081                 vap->iv_stats.is_rx_mgtdiscard++;
 2082                 break;
 2083 
 2084         default:
 2085                 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
 2086                     wh, "mgt", "subtype 0x%x not handled", subtype);
 2087                 vap->iv_stats.is_rx_badsubtype++;
 2088                 break;
 2089         }
 2090 }
 2091 
 2092 static void
 2093 mesh_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype)
 2094 {
 2095 
 2096         switch (subtype) {
 2097         case IEEE80211_FC0_SUBTYPE_BAR:
 2098                 ieee80211_recv_bar(ni, m);
 2099                 break;
 2100         }
 2101 }
 2102 
 2103 /*
 2104  * Parse meshpeering action ie's for MPM frames
 2105  */
 2106 static const struct ieee80211_meshpeer_ie *
 2107 mesh_parse_meshpeering_action(struct ieee80211_node *ni,
 2108         const struct ieee80211_frame *wh,       /* XXX for VERIFY_LENGTH */
 2109         const uint8_t *frm, const uint8_t *efrm,
 2110         struct ieee80211_meshpeer_ie *mp, uint8_t subtype)
 2111 {
 2112         struct ieee80211vap *vap = ni->ni_vap;
 2113         const struct ieee80211_meshpeer_ie *mpie;
 2114         uint16_t args[3];
 2115         const uint8_t *meshid, *meshconf;
 2116         uint8_t sendclose = 0; /* 1 = MPM frame rejected, close will be sent */
 2117 
 2118         meshid = meshconf = NULL;
 2119         while (efrm - frm > 1) {
 2120                 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return NULL);
 2121                 switch (*frm) {
 2122                 case IEEE80211_ELEMID_MESHID:
 2123                         meshid = frm;
 2124                         break;
 2125                 case IEEE80211_ELEMID_MESHCONF:
 2126                         meshconf = frm;
 2127                         break;
 2128                 case IEEE80211_ELEMID_MESHPEER:
 2129                         mpie = (const struct ieee80211_meshpeer_ie *) frm;
 2130                         memset(mp, 0, sizeof(*mp));
 2131                         mp->peer_len = mpie->peer_len;
 2132                         mp->peer_proto = le16dec(&mpie->peer_proto);
 2133                         mp->peer_llinkid = le16dec(&mpie->peer_llinkid);
 2134                         switch (subtype) {
 2135                         case IEEE80211_ACTION_MESHPEERING_CONFIRM:
 2136                                 mp->peer_linkid =
 2137                                     le16dec(&mpie->peer_linkid);
 2138                                 break;
 2139                         case IEEE80211_ACTION_MESHPEERING_CLOSE:
 2140                                 /* NB: peer link ID is optional */
 2141                                 if (mpie->peer_len ==
 2142                                     (IEEE80211_MPM_BASE_SZ + 2)) {
 2143                                         mp->peer_linkid = 0;
 2144                                         mp->peer_rcode =
 2145                                             le16dec(&mpie->peer_linkid);
 2146                                 } else {
 2147                                         mp->peer_linkid =
 2148                                             le16dec(&mpie->peer_linkid);
 2149                                         mp->peer_rcode =
 2150                                             le16dec(&mpie->peer_rcode);
 2151                                 }
 2152                                 break;
 2153                         }
 2154                         break;
 2155                 }
 2156                 frm += frm[1] + 2;
 2157         }
 2158 
 2159         /*
 2160          * Verify the contents of the frame.
 2161          * If it fails validation, close the peer link.
 2162          */
 2163         if (mesh_verify_meshpeer(vap, subtype, (const uint8_t *)mp)) {
 2164                 sendclose = 1;
 2165                 IEEE80211_DISCARD(vap,
 2166                     IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
 2167                     wh, NULL, "%s", "MPM validation failed");
 2168         }
 2169 
 2170         /* If meshid is not the same reject any frames type. */
 2171         if (sendclose == 0 && mesh_verify_meshid(vap, meshid)) {
 2172                 sendclose = 1;
 2173                 IEEE80211_DISCARD(vap,
 2174                     IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
 2175                     wh, NULL, "%s", "not for our mesh");
 2176                 if (subtype == IEEE80211_ACTION_MESHPEERING_CLOSE) {
 2177                         /*
 2178                          * Standard not clear about this, if we dont ignore
 2179                          * there will be an endless loop between nodes sending
 2180                          * CLOSE frames between each other with wrong meshid.
 2181                          * Discard and timers will bring FSM to IDLE state.
 2182                          */
 2183                         return NULL;
 2184                 }
 2185         }
 2186         
 2187         /*
 2188          * Close frames are accepted if meshid is the same.
 2189          * Verify the other two types.
 2190          */
 2191         if (sendclose == 0 && subtype != IEEE80211_ACTION_MESHPEERING_CLOSE &&
 2192             mesh_verify_meshconf(vap, meshconf)) {
 2193                 sendclose = 1;
 2194                 IEEE80211_DISCARD(vap,
 2195                     IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
 2196                     wh, NULL, "%s", "configuration missmatch");
 2197         }
 2198 
 2199         if (sendclose) {
 2200                 vap->iv_stats.is_rx_mgtdiscard++;
 2201                 switch (ni->ni_mlstate) {
 2202                 case IEEE80211_NODE_MESH_IDLE:
 2203                 case IEEE80211_NODE_MESH_ESTABLISHED:
 2204                 case IEEE80211_NODE_MESH_HOLDING:
 2205                         /* ignore */
 2206                         break;
 2207                 case IEEE80211_NODE_MESH_OPENSNT:
 2208                 case IEEE80211_NODE_MESH_OPENRCV:
 2209                 case IEEE80211_NODE_MESH_CONFIRMRCV:
 2210                         args[0] = ni->ni_mlpid;
 2211                         args[1] = ni->ni_mllid;
 2212                         /* Reason codes for rejection */
 2213                         switch (subtype) {
 2214                         case IEEE80211_ACTION_MESHPEERING_OPEN:
 2215                                 args[2] = IEEE80211_REASON_MESH_CPVIOLATION;
 2216                                 break;
 2217                         case IEEE80211_ACTION_MESHPEERING_CONFIRM:
 2218                                 args[2] = IEEE80211_REASON_MESH_INCONS_PARAMS;
 2219                                 break;
 2220                         }
 2221                         ieee80211_send_action(ni,
 2222                             IEEE80211_ACTION_CAT_SELF_PROT,
 2223                             IEEE80211_ACTION_MESHPEERING_CLOSE,
 2224                             args);
 2225                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
 2226                         mesh_peer_timeout_setup(ni);
 2227                         break;
 2228                 }
 2229                 return NULL;
 2230         }
 2231         
 2232         return (const struct ieee80211_meshpeer_ie *) mp;
 2233 }
 2234 
 2235 static int
 2236 mesh_recv_action_meshpeering_open(struct ieee80211_node *ni,
 2237         const struct ieee80211_frame *wh,
 2238         const uint8_t *frm, const uint8_t *efrm)
 2239 {
 2240         struct ieee80211vap *vap = ni->ni_vap;
 2241         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 2242         struct ieee80211_meshpeer_ie ie;
 2243         const struct ieee80211_meshpeer_ie *meshpeer;
 2244         uint16_t args[3];
 2245 
 2246         /* +2+2 for action + code + capabilites */
 2247         meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2, efrm, &ie,
 2248             IEEE80211_ACTION_MESHPEERING_OPEN);
 2249         if (meshpeer == NULL) {
 2250                 return 0;
 2251         }
 2252 
 2253         /* XXX move up */
 2254         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
 2255             "recv PEER OPEN, lid 0x%x", meshpeer->peer_llinkid);
 2256 
 2257         switch (ni->ni_mlstate) {
 2258         case IEEE80211_NODE_MESH_IDLE:
 2259                 /* Reject open request if reached our maximum neighbor count */
 2260                 if (ms->ms_neighbors >= IEEE80211_MESH_MAX_NEIGHBORS) {
 2261                         args[0] = meshpeer->peer_llinkid;
 2262                         args[1] = 0;
 2263                         args[2] = IEEE80211_REASON_MESH_MAX_PEERS;
 2264                         ieee80211_send_action(ni,
 2265                             IEEE80211_ACTION_CAT_SELF_PROT,
 2266                             IEEE80211_ACTION_MESHPEERING_CLOSE,
 2267                             args);
 2268                         /* stay in IDLE state */
 2269                         return (0);
 2270                 }
 2271                 /* Open frame accepted */
 2272                 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV);
 2273                 ni->ni_mllid = meshpeer->peer_llinkid;
 2274                 ni->ni_mlpid = mesh_generateid(vap);
 2275                 if (ni->ni_mlpid == 0)
 2276                         return 0;               /* XXX */
 2277                 args[0] = ni->ni_mlpid;
 2278                 /* Announce we're open too... */
 2279                 ieee80211_send_action(ni,
 2280                     IEEE80211_ACTION_CAT_SELF_PROT,
 2281                     IEEE80211_ACTION_MESHPEERING_OPEN, args);
 2282                 /* ...and confirm the link. */
 2283                 args[0] = ni->ni_mlpid;
 2284                 args[1] = ni->ni_mllid;
 2285                 ieee80211_send_action(ni,
 2286                     IEEE80211_ACTION_CAT_SELF_PROT,
 2287                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
 2288                     args);
 2289                 mesh_peer_timeout_setup(ni);
 2290                 break;
 2291         case IEEE80211_NODE_MESH_OPENRCV:
 2292                 /* Wrong Link ID */
 2293                 if (ni->ni_mllid != meshpeer->peer_llinkid) {
 2294                         args[0] = ni->ni_mllid;
 2295                         args[1] = ni->ni_mlpid;
 2296                         args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
 2297                         ieee80211_send_action(ni,
 2298                             IEEE80211_ACTION_CAT_SELF_PROT,
 2299                             IEEE80211_ACTION_MESHPEERING_CLOSE,
 2300                             args);
 2301                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
 2302                         mesh_peer_timeout_setup(ni);
 2303                         break;
 2304                 }
 2305                 /* Duplicate open, confirm again. */
 2306                 args[0] = ni->ni_mlpid;
 2307                 args[1] = ni->ni_mllid;
 2308                 ieee80211_send_action(ni,
 2309                     IEEE80211_ACTION_CAT_SELF_PROT,
 2310                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
 2311                     args);
 2312                 break;
 2313         case IEEE80211_NODE_MESH_OPENSNT:
 2314                 ni->ni_mllid = meshpeer->peer_llinkid;
 2315                 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV);
 2316                 args[0] = ni->ni_mlpid;
 2317                 args[1] = ni->ni_mllid;
 2318                 ieee80211_send_action(ni,
 2319                     IEEE80211_ACTION_CAT_SELF_PROT,
 2320                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
 2321                     args);
 2322                 /* NB: don't setup/clear any timeout */
 2323                 break;
 2324         case IEEE80211_NODE_MESH_CONFIRMRCV:
 2325                 if (ni->ni_mlpid != meshpeer->peer_linkid ||
 2326                     ni->ni_mllid != meshpeer->peer_llinkid) {
 2327                         args[0] = ni->ni_mlpid;
 2328                         args[1] = ni->ni_mllid;
 2329                         args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
 2330                         ieee80211_send_action(ni,
 2331                             IEEE80211_ACTION_CAT_SELF_PROT,
 2332                             IEEE80211_ACTION_MESHPEERING_CLOSE,
 2333                             args);
 2334                         mesh_linkchange(ni,
 2335                             IEEE80211_NODE_MESH_HOLDING);
 2336                         mesh_peer_timeout_setup(ni);
 2337                         break;
 2338                 }
 2339                 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED);
 2340                 ni->ni_mllid = meshpeer->peer_llinkid;
 2341                 args[0] = ni->ni_mlpid;
 2342                 args[1] = ni->ni_mllid;
 2343                 ieee80211_send_action(ni,
 2344                     IEEE80211_ACTION_CAT_SELF_PROT,
 2345                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
 2346                     args);
 2347                 mesh_peer_timeout_stop(ni);
 2348                 break;
 2349         case IEEE80211_NODE_MESH_ESTABLISHED:
 2350                 if (ni->ni_mllid != meshpeer->peer_llinkid) {
 2351                         args[0] = ni->ni_mllid;
 2352                         args[1] = ni->ni_mlpid;
 2353                         args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
 2354                         ieee80211_send_action(ni,
 2355                             IEEE80211_ACTION_CAT_SELF_PROT,
 2356                             IEEE80211_ACTION_MESHPEERING_CLOSE,
 2357                             args);
 2358                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
 2359                         mesh_peer_timeout_setup(ni);
 2360                         break;
 2361                 }
 2362                 args[0] = ni->ni_mlpid;
 2363                 args[1] = ni->ni_mllid;
 2364                 ieee80211_send_action(ni,
 2365                     IEEE80211_ACTION_CAT_SELF_PROT,
 2366                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
 2367                     args);
 2368                 break;
 2369         case IEEE80211_NODE_MESH_HOLDING:
 2370                 args[0] = ni->ni_mlpid;
 2371                 args[1] = meshpeer->peer_llinkid;
 2372                 /* Standard not clear about what the reaason code should be */
 2373                 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
 2374                 ieee80211_send_action(ni,
 2375                     IEEE80211_ACTION_CAT_SELF_PROT,
 2376                     IEEE80211_ACTION_MESHPEERING_CLOSE,
 2377                     args);
 2378                 break;
 2379         }
 2380         return 0;
 2381 }
 2382 
 2383 static int
 2384 mesh_recv_action_meshpeering_confirm(struct ieee80211_node *ni,
 2385         const struct ieee80211_frame *wh,
 2386         const uint8_t *frm, const uint8_t *efrm)
 2387 {
 2388         struct ieee80211vap *vap = ni->ni_vap;
 2389         struct ieee80211_meshpeer_ie ie;
 2390         const struct ieee80211_meshpeer_ie *meshpeer;
 2391         uint16_t args[3];
 2392 
 2393         /* +2+2+2+2 for action + code + capabilites + status code + AID */
 2394         meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2+2+2, efrm, &ie,
 2395             IEEE80211_ACTION_MESHPEERING_CONFIRM);
 2396         if (meshpeer == NULL) {
 2397                 return 0;
 2398         }
 2399 
 2400         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
 2401             "recv PEER CONFIRM, local id 0x%x, peer id 0x%x",
 2402             meshpeer->peer_llinkid, meshpeer->peer_linkid);
 2403 
 2404         switch (ni->ni_mlstate) {
 2405         case IEEE80211_NODE_MESH_OPENRCV:
 2406                 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED);
 2407                 mesh_peer_timeout_stop(ni);
 2408                 break;
 2409         case IEEE80211_NODE_MESH_OPENSNT:
 2410                 mesh_linkchange(ni, IEEE80211_NODE_MESH_CONFIRMRCV);
 2411                 mesh_peer_timeout_setup(ni);
 2412                 break;
 2413         case IEEE80211_NODE_MESH_HOLDING:
 2414                 args[0] = ni->ni_mlpid;
 2415                 args[1] = meshpeer->peer_llinkid;
 2416                 /* Standard not clear about what the reaason code should be */
 2417                 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
 2418                 ieee80211_send_action(ni,
 2419                     IEEE80211_ACTION_CAT_SELF_PROT,
 2420                     IEEE80211_ACTION_MESHPEERING_CLOSE,
 2421                     args);
 2422                 break;
 2423         case IEEE80211_NODE_MESH_CONFIRMRCV:
 2424                 if (ni->ni_mllid != meshpeer->peer_llinkid) {
 2425                         args[0] = ni->ni_mlpid;
 2426                         args[1] = ni->ni_mllid;
 2427                         args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
 2428                         ieee80211_send_action(ni,
 2429                             IEEE80211_ACTION_CAT_SELF_PROT,
 2430                             IEEE80211_ACTION_MESHPEERING_CLOSE,
 2431                             args);
 2432                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
 2433                         mesh_peer_timeout_setup(ni);
 2434                 }
 2435                 break;
 2436         default:
 2437                 IEEE80211_DISCARD(vap,
 2438                     IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
 2439                     wh, NULL, "received confirm in invalid state %d",
 2440                     ni->ni_mlstate);
 2441                 vap->iv_stats.is_rx_mgtdiscard++;
 2442                 break;
 2443         }
 2444         return 0;
 2445 }
 2446 
 2447 static int
 2448 mesh_recv_action_meshpeering_close(struct ieee80211_node *ni,
 2449         const struct ieee80211_frame *wh,
 2450         const uint8_t *frm, const uint8_t *efrm)
 2451 {
 2452         struct ieee80211_meshpeer_ie ie;
 2453         const struct ieee80211_meshpeer_ie *meshpeer;
 2454         uint16_t args[3];
 2455 
 2456         /* +2 for action + code */
 2457         meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2, efrm, &ie,
 2458             IEEE80211_ACTION_MESHPEERING_CLOSE);
 2459         if (meshpeer == NULL) {
 2460                 return 0;
 2461         }
 2462 
 2463         /*
 2464          * XXX: check reason code, for example we could receive
 2465          * IEEE80211_REASON_MESH_MAX_PEERS then we should not attempt
 2466          * to peer again.
 2467          */
 2468 
 2469         IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
 2470             ni, "%s", "recv PEER CLOSE");
 2471 
 2472         switch (ni->ni_mlstate) {
 2473         case IEEE80211_NODE_MESH_IDLE:
 2474                 /* ignore */
 2475                 break;
 2476         case IEEE80211_NODE_MESH_OPENRCV:
 2477         case IEEE80211_NODE_MESH_OPENSNT:
 2478         case IEEE80211_NODE_MESH_CONFIRMRCV:
 2479         case IEEE80211_NODE_MESH_ESTABLISHED:
 2480                 args[0] = ni->ni_mlpid;
 2481                 args[1] = ni->ni_mllid;
 2482                 args[2] = IEEE80211_REASON_MESH_CLOSE_RCVD;
 2483                 ieee80211_send_action(ni,
 2484                     IEEE80211_ACTION_CAT_SELF_PROT,
 2485                     IEEE80211_ACTION_MESHPEERING_CLOSE,
 2486                     args);
 2487                 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
 2488                 mesh_peer_timeout_setup(ni);
 2489                 break;
 2490         case IEEE80211_NODE_MESH_HOLDING:
 2491                 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE);
 2492                 mesh_peer_timeout_stop(ni);
 2493                 break;
 2494         }
 2495         return 0;
 2496 }
 2497 
 2498 /*
 2499  * Link Metric handling.
 2500  */
 2501 static int
 2502 mesh_recv_action_meshlmetric(struct ieee80211_node *ni,
 2503         const struct ieee80211_frame *wh,
 2504         const uint8_t *frm, const uint8_t *efrm)
 2505 {
 2506         const struct ieee80211_meshlmetric_ie *ie =
 2507             (const struct ieee80211_meshlmetric_ie *)
 2508             (frm+2); /* action + code */
 2509         struct ieee80211_meshlmetric_ie lm_rep;
 2510         
 2511         if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) {
 2512                 lm_rep.lm_flags = 0;
 2513                 lm_rep.lm_metric = mesh_airtime_calc(ni);
 2514                 ieee80211_send_action(ni,
 2515                     IEEE80211_ACTION_CAT_MESH,
 2516                     IEEE80211_ACTION_MESH_LMETRIC,
 2517                     &lm_rep);
 2518         }
 2519         /* XXX: else do nothing for now */
 2520         return 0;
 2521 }
 2522 
 2523 /*
 2524  * Parse meshgate action ie's for GANN frames.
 2525  * Returns -1 if parsing fails, otherwise 0.
 2526  */
 2527 static int
 2528 mesh_parse_meshgate_action(struct ieee80211_node *ni,
 2529     const struct ieee80211_frame *wh,   /* XXX for VERIFY_LENGTH */
 2530     struct ieee80211_meshgann_ie *ie, const uint8_t *frm, const uint8_t *efrm)
 2531 {
 2532         struct ieee80211vap *vap = ni->ni_vap;
 2533         const struct ieee80211_meshgann_ie *gannie;
 2534 
 2535         while (efrm - frm > 1) {
 2536                 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return -1);
 2537                 switch (*frm) {
 2538                 case IEEE80211_ELEMID_MESHGANN:
 2539                         gannie = (const struct ieee80211_meshgann_ie *) frm;
 2540                         memset(ie, 0, sizeof(*ie));
 2541                         ie->gann_ie = gannie->gann_ie;
 2542                         ie->gann_len = gannie->gann_len;
 2543                         ie->gann_flags = gannie->gann_flags;
 2544                         ie->gann_hopcount = gannie->gann_hopcount;
 2545                         ie->gann_ttl = gannie->gann_ttl;
 2546                         IEEE80211_ADDR_COPY(ie->gann_addr, gannie->gann_addr);
 2547                         ie->gann_seq = le32dec(&gannie->gann_seq);
 2548                         ie->gann_interval = le16dec(&gannie->gann_interval);
 2549                         break;
 2550                 }
 2551                 frm += frm[1] + 2;
 2552         }
 2553 
 2554         return 0;
 2555 }
 2556 
 2557 /*
 2558  * Mesh Gate Announcement handling.
 2559  */
 2560 static int
 2561 mesh_recv_action_meshgate(struct ieee80211_node *ni,
 2562         const struct ieee80211_frame *wh,
 2563         const uint8_t *frm, const uint8_t *efrm)
 2564 {
 2565         struct ieee80211vap *vap = ni->ni_vap;
 2566         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 2567         struct ieee80211_mesh_gate_route *gr, *next;
 2568         struct ieee80211_mesh_route *rt_gate;
 2569         struct ieee80211_meshgann_ie pgann;
 2570         struct ieee80211_meshgann_ie ie;
 2571         int found = 0;
 2572 
 2573         /* +2 for action + code */
 2574         if (mesh_parse_meshgate_action(ni, wh, &ie, frm+2, efrm) != 0) {
 2575                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
 2576                     ni->ni_macaddr, NULL, "%s",
 2577                     "GANN parsing failed");
 2578                 vap->iv_stats.is_rx_mgtdiscard++;
 2579                 return (0);
 2580         }
 2581 
 2582         if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ie.gann_addr))
 2583                 return 0;
 2584 
 2585         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ni->ni_macaddr,
 2586             "received GANN, meshgate: %6D (seq %u)", ie.gann_addr, ":",
 2587             ie.gann_seq);
 2588 
 2589         if (ms == NULL)
 2590                 return (0);
 2591         MESH_RT_LOCK(ms);
 2592         TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) {
 2593                 if (!IEEE80211_ADDR_EQ(gr->gr_addr, ie.gann_addr))
 2594                         continue;
 2595                 if (ie.gann_seq <= gr->gr_lastseq) {
 2596                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
 2597                             ni->ni_macaddr, NULL,
 2598                             "GANN old seqno %u <= %u",
 2599                             ie.gann_seq, gr->gr_lastseq);
 2600                         MESH_RT_UNLOCK(ms);
 2601                         return (0);
 2602                 }
 2603                 /* corresponding mesh gate found & GANN accepted */
 2604                 found = 1;
 2605                 break;
 2606 
 2607         }
 2608         if (found == 0) {
 2609                 /* this GANN is from a new mesh Gate add it to known table. */
 2610                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie.gann_addr,
 2611                     "stored new GANN information, seq %u.", ie.gann_seq);
 2612                 gr = IEEE80211_MALLOC(ALIGN(sizeof(struct ieee80211_mesh_gate_route)),
 2613                     M_80211_MESH_GT_RT,
 2614                     IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
 2615                 IEEE80211_ADDR_COPY(gr->gr_addr, ie.gann_addr);
 2616                 TAILQ_INSERT_TAIL(&ms->ms_known_gates, gr, gr_next);
 2617         }
 2618         gr->gr_lastseq = ie.gann_seq;
 2619 
 2620         /* check if we have a path to this gate */
 2621         rt_gate = mesh_rt_find_locked(ms, gr->gr_addr);
 2622         if (rt_gate != NULL &&
 2623             rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) {
 2624                 gr->gr_route = rt_gate;
 2625                 rt_gate->rt_flags |= IEEE80211_MESHRT_FLAGS_GATE;
 2626         }
 2627 
 2628         MESH_RT_UNLOCK(ms);
 2629 
 2630         /* popagate only if decremented ttl >= 1 && forwarding is enabled */
 2631         if ((ie.gann_ttl - 1) < 1 && !(ms->ms_flags & IEEE80211_MESHFLAGS_FWD))
 2632                 return 0;
 2633                 pgann.gann_flags = ie.gann_flags; /* Reserved */
 2634         pgann.gann_hopcount = ie.gann_hopcount + 1;
 2635         pgann.gann_ttl = ie.gann_ttl - 1;
 2636         IEEE80211_ADDR_COPY(pgann.gann_addr, ie.gann_addr);
 2637         pgann.gann_seq = ie.gann_seq;
 2638         pgann.gann_interval = ie.gann_interval;
 2639 
 2640         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie.gann_addr,
 2641             "%s", "propagate GANN");
 2642 
 2643         ieee80211_send_action(vap->iv_bss, IEEE80211_ACTION_CAT_MESH,
 2644             IEEE80211_ACTION_MESH_GANN, &pgann);
 2645 
 2646         return 0;
 2647 }
 2648 
 2649 static int
 2650 mesh_send_action(struct ieee80211_node *ni,
 2651     const uint8_t sa[IEEE80211_ADDR_LEN],
 2652     const uint8_t da[IEEE80211_ADDR_LEN],
 2653     struct mbuf *m)
 2654 {
 2655         struct ieee80211vap *vap = ni->ni_vap;
 2656         struct ieee80211com *ic = ni->ni_ic;
 2657         struct ieee80211_bpf_params params;
 2658         int ret;
 2659 
 2660         KASSERT(ni != NULL, ("null node"));
 2661 
 2662         if (vap->iv_state == IEEE80211_S_CAC) {
 2663                 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT, ni,
 2664                     "block %s frame in CAC state", "Mesh action");
 2665                 vap->iv_stats.is_tx_badstate++;
 2666                 ieee80211_free_node(ni);
 2667                 m_freem(m);
 2668                 return EIO;             /* XXX */
 2669         }
 2670 
 2671         M_PREPEND(m, sizeof(struct ieee80211_frame), M_NOWAIT);
 2672         if (m == NULL) {
 2673                 ieee80211_free_node(ni);
 2674                 return ENOMEM;
 2675         }
 2676 
 2677         IEEE80211_TX_LOCK(ic);
 2678         ieee80211_send_setup(ni, m,
 2679              IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_ACTION,
 2680              IEEE80211_NONQOS_TID, sa, da, sa);
 2681         m->m_flags |= M_ENCAP;          /* mark encapsulated */
 2682 
 2683         memset(&params, 0, sizeof(params));
 2684         params.ibp_pri = WME_AC_VO;
 2685         params.ibp_rate0 = ni->ni_txparms->mgmtrate;
 2686         if (IEEE80211_IS_MULTICAST(da))
 2687                 params.ibp_try0 = 1;
 2688         else
 2689                 params.ibp_try0 = ni->ni_txparms->maxretry;
 2690         params.ibp_power = ni->ni_txpower;
 2691 
 2692         IEEE80211_NODE_STAT(ni, tx_mgmt);
 2693 
 2694         ret = ieee80211_raw_output(vap, ni, m, &params);
 2695         IEEE80211_TX_UNLOCK(ic);
 2696         return (ret);
 2697 }
 2698 
 2699 #define ADDSHORT(frm, v) do {                   \
 2700         frm[0] = (v) & 0xff;                    \
 2701         frm[1] = (v) >> 8;                      \
 2702         frm += 2;                               \
 2703 } while (0)
 2704 #define ADDWORD(frm, v) do {                    \
 2705         frm[0] = (v) & 0xff;                    \
 2706         frm[1] = ((v) >> 8) & 0xff;             \
 2707         frm[2] = ((v) >> 16) & 0xff;            \
 2708         frm[3] = ((v) >> 24) & 0xff;            \
 2709         frm += 4;                               \
 2710 } while (0)
 2711 
 2712 static int
 2713 mesh_send_action_meshpeering_open(struct ieee80211_node *ni,
 2714         int category, int action, void *args0)
 2715 {
 2716         struct ieee80211vap *vap = ni->ni_vap;
 2717         struct ieee80211com *ic = ni->ni_ic;
 2718         uint16_t *args = args0;
 2719         const struct ieee80211_rateset *rs;
 2720         struct mbuf *m;
 2721         uint8_t *frm;
 2722 
 2723         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
 2724             "send PEER OPEN action: localid 0x%x", args[0]);
 2725 
 2726         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
 2727             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
 2728             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
 2729         ieee80211_ref_node(ni);
 2730 
 2731         m = ieee80211_getmgtframe(&frm,
 2732             ic->ic_headroom + sizeof(struct ieee80211_frame),
 2733             sizeof(uint16_t)    /* action+category */
 2734             + sizeof(uint16_t)  /* capabilites */
 2735             + 2 + IEEE80211_RATE_SIZE
 2736             + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
 2737             + 2 + IEEE80211_MESHID_LEN
 2738             + sizeof(struct ieee80211_meshconf_ie)
 2739             + sizeof(struct ieee80211_meshpeer_ie)
 2740         );
 2741         if (m != NULL) {
 2742                 /*
 2743                  * mesh peer open action frame format:
 2744                  *   [1] category
 2745                  *   [1] action
 2746                  *   [2] capabilities
 2747                  *   [tlv] rates
 2748                  *   [tlv] xrates
 2749                  *   [tlv] mesh id
 2750                  *   [tlv] mesh conf
 2751                  *   [tlv] mesh peer link mgmt
 2752                  */
 2753                 *frm++ = category;
 2754                 *frm++ = action;
 2755                 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan));
 2756                 rs = ieee80211_get_suprates(ic, ic->ic_curchan);
 2757                 frm = ieee80211_add_rates(frm, rs);
 2758                 frm = ieee80211_add_xrates(frm, rs);
 2759                 frm = ieee80211_add_meshid(frm, vap);
 2760                 frm = ieee80211_add_meshconf(frm, vap);
 2761                 frm = ieee80211_add_meshpeer(frm, IEEE80211_ACTION_MESHPEERING_OPEN,
 2762                     args[0], 0, 0);
 2763                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
 2764                 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m);
 2765         } else {
 2766                 vap->iv_stats.is_tx_nobuf++;
 2767                 ieee80211_free_node(ni);
 2768                 return ENOMEM;
 2769         }
 2770 }
 2771 
 2772 static int
 2773 mesh_send_action_meshpeering_confirm(struct ieee80211_node *ni,
 2774         int category, int action, void *args0)
 2775 {
 2776         struct ieee80211vap *vap = ni->ni_vap;
 2777         struct ieee80211com *ic = ni->ni_ic;
 2778         uint16_t *args = args0;
 2779         const struct ieee80211_rateset *rs;
 2780         struct mbuf *m;
 2781         uint8_t *frm;
 2782 
 2783         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
 2784             "send PEER CONFIRM action: localid 0x%x, peerid 0x%x",
 2785             args[0], args[1]);
 2786 
 2787         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
 2788             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
 2789             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
 2790         ieee80211_ref_node(ni);
 2791 
 2792         m = ieee80211_getmgtframe(&frm,
 2793             ic->ic_headroom + sizeof(struct ieee80211_frame),
 2794             sizeof(uint16_t)    /* action+category */
 2795             + sizeof(uint16_t)  /* capabilites */
 2796             + sizeof(uint16_t)  /* status code */
 2797             + sizeof(uint16_t)  /* AID */
 2798             + 2 + IEEE80211_RATE_SIZE
 2799             + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
 2800             + 2 + IEEE80211_MESHID_LEN
 2801             + sizeof(struct ieee80211_meshconf_ie)
 2802             + sizeof(struct ieee80211_meshpeer_ie)
 2803         );
 2804         if (m != NULL) {
 2805                 /*
 2806                  * mesh peer confirm action frame format:
 2807                  *   [1] category
 2808                  *   [1] action
 2809                  *   [2] capabilities
 2810                  *   [2] status code
 2811                  *   [2] association id (peer ID)
 2812                  *   [tlv] rates
 2813                  *   [tlv] xrates
 2814                  *   [tlv] mesh id
 2815                  *   [tlv] mesh conf
 2816                  *   [tlv] mesh peer link mgmt
 2817                  */
 2818                 *frm++ = category;
 2819                 *frm++ = action;
 2820                 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan));
 2821                 ADDSHORT(frm, 0);               /* status code */
 2822                 ADDSHORT(frm, args[1]);         /* AID */
 2823                 rs = ieee80211_get_suprates(ic, ic->ic_curchan);
 2824                 frm = ieee80211_add_rates(frm, rs);
 2825                 frm = ieee80211_add_xrates(frm, rs);
 2826                 frm = ieee80211_add_meshid(frm, vap);
 2827                 frm = ieee80211_add_meshconf(frm, vap);
 2828                 frm = ieee80211_add_meshpeer(frm,
 2829                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
 2830                     args[0], args[1], 0);
 2831                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
 2832                 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m);
 2833         } else {
 2834                 vap->iv_stats.is_tx_nobuf++;
 2835                 ieee80211_free_node(ni);
 2836                 return ENOMEM;
 2837         }
 2838 }
 2839 
 2840 static int
 2841 mesh_send_action_meshpeering_close(struct ieee80211_node *ni,
 2842         int category, int action, void *args0)
 2843 {
 2844         struct ieee80211vap *vap = ni->ni_vap;
 2845         struct ieee80211com *ic = ni->ni_ic;
 2846         uint16_t *args = args0;
 2847         struct mbuf *m;
 2848         uint8_t *frm;
 2849 
 2850         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
 2851             "send PEER CLOSE action: localid 0x%x, peerid 0x%x reason %d (%s)",
 2852             args[0], args[1], args[2], ieee80211_reason_to_string(args[2]));
 2853 
 2854         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
 2855             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
 2856             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
 2857         ieee80211_ref_node(ni);
 2858 
 2859         m = ieee80211_getmgtframe(&frm,
 2860             ic->ic_headroom + sizeof(struct ieee80211_frame),
 2861             sizeof(uint16_t)    /* action+category */
 2862             + sizeof(uint16_t)  /* reason code */
 2863             + 2 + IEEE80211_MESHID_LEN
 2864             + sizeof(struct ieee80211_meshpeer_ie)
 2865         );
 2866         if (m != NULL) {
 2867                 /*
 2868                  * mesh peer close action frame format:
 2869                  *   [1] category
 2870                  *   [1] action
 2871                  *   [tlv] mesh id
 2872                  *   [tlv] mesh peer link mgmt
 2873                  */
 2874                 *frm++ = category;
 2875                 *frm++ = action;
 2876                 frm = ieee80211_add_meshid(frm, vap);
 2877                 frm = ieee80211_add_meshpeer(frm,
 2878                     IEEE80211_ACTION_MESHPEERING_CLOSE,
 2879                     args[0], args[1], args[2]);
 2880                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
 2881                 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m);
 2882         } else {
 2883                 vap->iv_stats.is_tx_nobuf++;
 2884                 ieee80211_free_node(ni);
 2885                 return ENOMEM;
 2886         }
 2887 }
 2888 
 2889 static int
 2890 mesh_send_action_meshlmetric(struct ieee80211_node *ni,
 2891         int category, int action, void *arg0)
 2892 {
 2893         struct ieee80211vap *vap = ni->ni_vap;
 2894         struct ieee80211com *ic = ni->ni_ic;
 2895         struct ieee80211_meshlmetric_ie *ie = arg0;
 2896         struct mbuf *m;
 2897         uint8_t *frm;
 2898 
 2899         if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) {
 2900                 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
 2901                     ni, "%s", "send LINK METRIC REQUEST action");
 2902         } else {
 2903                 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
 2904                     ni, "send LINK METRIC REPLY action: metric 0x%x",
 2905                     ie->lm_metric);
 2906         }
 2907         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
 2908             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
 2909             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
 2910         ieee80211_ref_node(ni);
 2911 
 2912         m = ieee80211_getmgtframe(&frm,
 2913             ic->ic_headroom + sizeof(struct ieee80211_frame),
 2914             sizeof(uint16_t) +  /* action+category */
 2915             sizeof(struct ieee80211_meshlmetric_ie)
 2916         );
 2917         if (m != NULL) {
 2918                 /*
 2919                  * mesh link metric
 2920                  *   [1] category
 2921                  *   [1] action
 2922                  *   [tlv] mesh link metric
 2923                  */
 2924                 *frm++ = category;
 2925                 *frm++ = action;
 2926                 frm = ieee80211_add_meshlmetric(frm,
 2927                     ie->lm_flags, ie->lm_metric);
 2928                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
 2929                 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m);
 2930         } else {
 2931                 vap->iv_stats.is_tx_nobuf++;
 2932                 ieee80211_free_node(ni);
 2933                 return ENOMEM;
 2934         }
 2935 }
 2936 
 2937 static int
 2938 mesh_send_action_meshgate(struct ieee80211_node *ni,
 2939         int category, int action, void *arg0)
 2940 {
 2941         struct ieee80211vap *vap = ni->ni_vap;
 2942         struct ieee80211com *ic = ni->ni_ic;
 2943         struct ieee80211_meshgann_ie *ie = arg0;
 2944         struct mbuf *m;
 2945         uint8_t *frm;
 2946 
 2947         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
 2948             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
 2949             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
 2950         ieee80211_ref_node(ni);
 2951 
 2952         m = ieee80211_getmgtframe(&frm,
 2953             ic->ic_headroom + sizeof(struct ieee80211_frame),
 2954             sizeof(uint16_t) +  /* action+category */
 2955             IEEE80211_MESHGANN_BASE_SZ
 2956         );
 2957         if (m != NULL) {
 2958                 /*
 2959                  * mesh link metric
 2960                  *   [1] category
 2961                  *   [1] action
 2962                  *   [tlv] mesh gate annoucement
 2963                  */
 2964                 *frm++ = category;
 2965                 *frm++ = action;
 2966                 frm = ieee80211_add_meshgate(frm, ie);
 2967                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
 2968                 return mesh_send_action(ni, vap->iv_myaddr, broadcastaddr, m);
 2969         } else {
 2970                 vap->iv_stats.is_tx_nobuf++;
 2971                 ieee80211_free_node(ni);
 2972                 return ENOMEM;
 2973         }
 2974 }
 2975 
 2976 static void
 2977 mesh_peer_timeout_setup(struct ieee80211_node *ni)
 2978 {
 2979         switch (ni->ni_mlstate) {
 2980         case IEEE80211_NODE_MESH_HOLDING:
 2981                 ni->ni_mltval = ieee80211_mesh_holdingtimeout;
 2982                 break;
 2983         case IEEE80211_NODE_MESH_CONFIRMRCV:
 2984                 ni->ni_mltval = ieee80211_mesh_confirmtimeout;
 2985                 break;
 2986         case IEEE80211_NODE_MESH_IDLE:
 2987                 ni->ni_mltval = 0;
 2988                 break;
 2989         default:
 2990                 ni->ni_mltval = ieee80211_mesh_retrytimeout;
 2991                 break;
 2992         }
 2993         if (ni->ni_mltval)
 2994                 callout_reset(&ni->ni_mltimer, ni->ni_mltval,
 2995                     mesh_peer_timeout_cb, ni);
 2996 }
 2997 
 2998 /*
 2999  * Same as above but backoffs timer statisically 50%.
 3000  */
 3001 static void
 3002 mesh_peer_timeout_backoff(struct ieee80211_node *ni)
 3003 {
 3004         uint32_t r;
 3005         
 3006         r = arc4random();
 3007         ni->ni_mltval += r % ni->ni_mltval;
 3008         callout_reset(&ni->ni_mltimer, ni->ni_mltval, mesh_peer_timeout_cb,
 3009             ni);
 3010 }
 3011 
 3012 static __inline void
 3013 mesh_peer_timeout_stop(struct ieee80211_node *ni)
 3014 {
 3015         callout_drain(&ni->ni_mltimer);
 3016 }
 3017 
 3018 static void
 3019 mesh_peer_backoff_cb(void *arg)
 3020 {
 3021         struct ieee80211_node *ni = (struct ieee80211_node *)arg;
 3022 
 3023         /* After backoff timeout, try to peer automatically again. */
 3024         ni->ni_mlhcnt = 0;
 3025 }
 3026 
 3027 /*
 3028  * Mesh Peer Link Management FSM timeout handling.
 3029  */
 3030 static void
 3031 mesh_peer_timeout_cb(void *arg)
 3032 {
 3033         struct ieee80211_node *ni = (struct ieee80211_node *)arg;
 3034         uint16_t args[3];
 3035 
 3036         IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_MESH,
 3037             ni, "mesh link timeout, state %d, retry counter %d",
 3038             ni->ni_mlstate, ni->ni_mlrcnt);
 3039         
 3040         switch (ni->ni_mlstate) {
 3041         case IEEE80211_NODE_MESH_IDLE:
 3042         case IEEE80211_NODE_MESH_ESTABLISHED:
 3043                 break;
 3044         case IEEE80211_NODE_MESH_OPENSNT:
 3045         case IEEE80211_NODE_MESH_OPENRCV:
 3046                 if (ni->ni_mlrcnt == ieee80211_mesh_maxretries) {
 3047                         args[0] = ni->ni_mlpid;
 3048                         args[2] = IEEE80211_REASON_MESH_MAX_RETRIES;
 3049                         ieee80211_send_action(ni,
 3050                             IEEE80211_ACTION_CAT_SELF_PROT,
 3051                             IEEE80211_ACTION_MESHPEERING_CLOSE, args);
 3052                         ni->ni_mlrcnt = 0;
 3053                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
 3054                         mesh_peer_timeout_setup(ni);
 3055                 } else {
 3056                         args[0] = ni->ni_mlpid;
 3057                         ieee80211_send_action(ni,
 3058                             IEEE80211_ACTION_CAT_SELF_PROT,
 3059                             IEEE80211_ACTION_MESHPEERING_OPEN, args);
 3060                         ni->ni_mlrcnt++;
 3061                         mesh_peer_timeout_backoff(ni);
 3062                 }
 3063                 break;
 3064         case IEEE80211_NODE_MESH_CONFIRMRCV:
 3065                 args[0] = ni->ni_mlpid;
 3066                 args[2] = IEEE80211_REASON_MESH_CONFIRM_TIMEOUT;
 3067                 ieee80211_send_action(ni,
 3068                     IEEE80211_ACTION_CAT_SELF_PROT,
 3069                     IEEE80211_ACTION_MESHPEERING_CLOSE, args);
 3070                 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
 3071                 mesh_peer_timeout_setup(ni);
 3072                 break;
 3073         case IEEE80211_NODE_MESH_HOLDING:
 3074                 ni->ni_mlhcnt++;
 3075                 if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding)
 3076                         callout_reset(&ni->ni_mlhtimer,
 3077                             ieee80211_mesh_backofftimeout,
 3078                             mesh_peer_backoff_cb, ni);
 3079                 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE);
 3080                 break;
 3081         }
 3082 }
 3083 
 3084 static int
 3085 mesh_verify_meshid(struct ieee80211vap *vap, const uint8_t *ie)
 3086 {
 3087         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 3088 
 3089         if (ie == NULL || ie[1] != ms->ms_idlen)
 3090                 return 1;
 3091         return memcmp(ms->ms_id, ie + 2, ms->ms_idlen);
 3092 }
 3093 
 3094 /*
 3095  * Check if we are using the same algorithms for this mesh.
 3096  */
 3097 static int
 3098 mesh_verify_meshconf(struct ieee80211vap *vap, const uint8_t *ie)
 3099 {
 3100         const struct ieee80211_meshconf_ie *meshconf =
 3101             (const struct ieee80211_meshconf_ie *) ie;
 3102         const struct ieee80211_mesh_state *ms = vap->iv_mesh;
 3103 
 3104         if (meshconf == NULL)
 3105                 return 1;
 3106         if (meshconf->conf_pselid != ms->ms_ppath->mpp_ie) {
 3107                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
 3108                     "unknown path selection algorithm: 0x%x\n",
 3109                     meshconf->conf_pselid);
 3110                 return 1;
 3111         }
 3112         if (meshconf->conf_pmetid != ms->ms_pmetric->mpm_ie) {
 3113                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
 3114                     "unknown path metric algorithm: 0x%x\n",
 3115                     meshconf->conf_pmetid);
 3116                 return 1;
 3117         }
 3118         if (meshconf->conf_ccid != 0) {
 3119                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
 3120                     "unknown congestion control algorithm: 0x%x\n",
 3121                     meshconf->conf_ccid);
 3122                 return 1;
 3123         }
 3124         if (meshconf->conf_syncid != IEEE80211_MESHCONF_SYNC_NEIGHOFF) {
 3125                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
 3126                     "unknown sync algorithm: 0x%x\n",
 3127                     meshconf->conf_syncid);
 3128                 return 1;
 3129         }
 3130         if (meshconf->conf_authid != 0) {
 3131                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
 3132                     "unknown auth auth algorithm: 0x%x\n",
 3133                     meshconf->conf_pselid);
 3134                 return 1;
 3135         }
 3136         /* Not accepting peers */
 3137         if (!(meshconf->conf_cap & IEEE80211_MESHCONF_CAP_AP)) {
 3138                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
 3139                     "not accepting peers: 0x%x\n", meshconf->conf_cap);
 3140                 return 1;
 3141         }
 3142         return 0;
 3143 }
 3144 
 3145 static int
 3146 mesh_verify_meshpeer(struct ieee80211vap *vap, uint8_t subtype,
 3147     const uint8_t *ie)
 3148 {
 3149         const struct ieee80211_meshpeer_ie *meshpeer =
 3150             (const struct ieee80211_meshpeer_ie *) ie;
 3151 
 3152         if (meshpeer == NULL ||
 3153             meshpeer->peer_len < IEEE80211_MPM_BASE_SZ ||
 3154             meshpeer->peer_len > IEEE80211_MPM_MAX_SZ)
 3155                 return 1;
 3156         if (meshpeer->peer_proto != IEEE80211_MPPID_MPM) {
 3157                 IEEE80211_DPRINTF(vap,
 3158                     IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
 3159                     "Only MPM protocol is supported (proto: 0x%02X)",
 3160                     meshpeer->peer_proto);
 3161                 return 1;
 3162         }
 3163         switch (subtype) {
 3164         case IEEE80211_ACTION_MESHPEERING_OPEN:
 3165                 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ)
 3166                         return 1;
 3167                 break;
 3168         case IEEE80211_ACTION_MESHPEERING_CONFIRM:
 3169                 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ + 2)
 3170                         return 1;
 3171                 break;
 3172         case IEEE80211_ACTION_MESHPEERING_CLOSE:
 3173                 if (meshpeer->peer_len < IEEE80211_MPM_BASE_SZ + 2)
 3174                         return 1;
 3175                 if (meshpeer->peer_len == (IEEE80211_MPM_BASE_SZ + 2) &&
 3176                     meshpeer->peer_linkid != 0)
 3177                         return 1;
 3178                 if (meshpeer->peer_rcode == 0)
 3179                         return 1;
 3180                 break;
 3181         }
 3182         return 0;
 3183 }
 3184 
 3185 /*
 3186  * Add a Mesh ID IE to a frame.
 3187  */
 3188 uint8_t *
 3189 ieee80211_add_meshid(uint8_t *frm, struct ieee80211vap *vap)
 3190 {
 3191         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 3192 
 3193         KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a mbss vap"));
 3194 
 3195         *frm++ = IEEE80211_ELEMID_MESHID;
 3196         *frm++ = ms->ms_idlen;
 3197         memcpy(frm, ms->ms_id, ms->ms_idlen);
 3198         return frm + ms->ms_idlen;
 3199 }
 3200 
 3201 /*
 3202  * Add a Mesh Configuration IE to a frame.
 3203  * For now just use HWMP routing, Airtime link metric, Null Congestion
 3204  * Signaling, Null Sync Protocol and Null Authentication.
 3205  */
 3206 uint8_t *
 3207 ieee80211_add_meshconf(uint8_t *frm, struct ieee80211vap *vap)
 3208 {
 3209         const struct ieee80211_mesh_state *ms = vap->iv_mesh;
 3210         uint16_t caps;
 3211 
 3212         KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap"));
 3213 
 3214         *frm++ = IEEE80211_ELEMID_MESHCONF;
 3215         *frm++ = IEEE80211_MESH_CONF_SZ;
 3216         *frm++ = ms->ms_ppath->mpp_ie;          /* path selection */
 3217         *frm++ = ms->ms_pmetric->mpm_ie;        /* link metric */
 3218         *frm++ = IEEE80211_MESHCONF_CC_DISABLED;
 3219         *frm++ = IEEE80211_MESHCONF_SYNC_NEIGHOFF;
 3220         *frm++ = IEEE80211_MESHCONF_AUTH_DISABLED;
 3221         /* NB: set the number of neighbors before the rest */
 3222         *frm = (ms->ms_neighbors > IEEE80211_MESH_MAX_NEIGHBORS ?
 3223             IEEE80211_MESH_MAX_NEIGHBORS : ms->ms_neighbors) << 1;
 3224         if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE)
 3225                 *frm |= IEEE80211_MESHCONF_FORM_GATE;
 3226         frm += 1;
 3227         caps = 0;
 3228         if (ms->ms_flags & IEEE80211_MESHFLAGS_AP)
 3229                 caps |= IEEE80211_MESHCONF_CAP_AP;
 3230         if (ms->ms_flags & IEEE80211_MESHFLAGS_FWD)
 3231                 caps |= IEEE80211_MESHCONF_CAP_FWRD;
 3232         *frm++ = caps;
 3233         return frm;
 3234 }
 3235 
 3236 /*
 3237  * Add a Mesh Peer Management IE to a frame.
 3238  */
 3239 uint8_t *
 3240 ieee80211_add_meshpeer(uint8_t *frm, uint8_t subtype, uint16_t localid,
 3241     uint16_t peerid, uint16_t reason)
 3242 {
 3243 
 3244         KASSERT(localid != 0, ("localid == 0"));
 3245 
 3246         *frm++ = IEEE80211_ELEMID_MESHPEER;
 3247         switch (subtype) {
 3248         case IEEE80211_ACTION_MESHPEERING_OPEN:
 3249                 *frm++ = IEEE80211_MPM_BASE_SZ;         /* length */
 3250                 ADDSHORT(frm, IEEE80211_MPPID_MPM);     /* proto */
 3251                 ADDSHORT(frm, localid);                 /* local ID */
 3252                 break;
 3253         case IEEE80211_ACTION_MESHPEERING_CONFIRM:
 3254                 KASSERT(peerid != 0, ("sending peer confirm without peer id"));
 3255                 *frm++ = IEEE80211_MPM_BASE_SZ + 2;     /* length */
 3256                 ADDSHORT(frm, IEEE80211_MPPID_MPM);     /* proto */
 3257                 ADDSHORT(frm, localid);                 /* local ID */
 3258                 ADDSHORT(frm, peerid);                  /* peer ID */
 3259                 break;
 3260         case IEEE80211_ACTION_MESHPEERING_CLOSE:
 3261                 if (peerid)
 3262                         *frm++ = IEEE80211_MPM_MAX_SZ;  /* length */
 3263                 else
 3264                         *frm++ = IEEE80211_MPM_BASE_SZ + 2; /* length */
 3265                 ADDSHORT(frm, IEEE80211_MPPID_MPM);     /* proto */
 3266                 ADDSHORT(frm, localid); /* local ID */
 3267                 if (peerid)
 3268                         ADDSHORT(frm, peerid);  /* peer ID */
 3269                 ADDSHORT(frm, reason);
 3270                 break;
 3271         }
 3272         return frm;
 3273 }
 3274 
 3275 /*
 3276  * Compute an Airtime Link Metric for the link with this node.
 3277  *
 3278  * Based on Draft 3.0 spec (11B.10, p.149).
 3279  */
 3280 /*
 3281  * Max 802.11s overhead.
 3282  */
 3283 #define IEEE80211_MESH_MAXOVERHEAD \
 3284         (sizeof(struct ieee80211_qosframe_addr4) \
 3285          + sizeof(struct ieee80211_meshcntl_ae10) \
 3286         + sizeof(struct llc) \
 3287         + IEEE80211_ADDR_LEN \
 3288         + IEEE80211_WEP_IVLEN \
 3289         + IEEE80211_WEP_KIDLEN \
 3290         + IEEE80211_WEP_CRCLEN \
 3291         + IEEE80211_WEP_MICLEN \
 3292         + IEEE80211_CRC_LEN)
 3293 uint32_t
 3294 mesh_airtime_calc(struct ieee80211_node *ni)
 3295 {
 3296 #define M_BITS 8
 3297 #define S_FACTOR (2 * M_BITS)
 3298         struct ieee80211com *ic = ni->ni_ic;
 3299         struct ifnet *ifp = ni->ni_vap->iv_ifp;
 3300         const static int nbits = 8192 << M_BITS;
 3301         uint32_t overhead, rate, errrate;
 3302         uint64_t res;
 3303 
 3304         /* Time to transmit a frame */
 3305         rate = ni->ni_txrate;
 3306         overhead = ieee80211_compute_duration(ic->ic_rt,
 3307             ifp->if_mtu + IEEE80211_MESH_MAXOVERHEAD, rate, 0) << M_BITS;
 3308         /* Error rate in percentage */
 3309         /* XXX assuming small failures are ok */
 3310         errrate = (((ifp->if_get_counter(ifp, IFCOUNTER_OERRORS) +
 3311             ifp->if_get_counter(ifp, IFCOUNTER_IERRORS)) / 100) << M_BITS)
 3312             / 100;
 3313         res = (overhead + (nbits / rate)) *
 3314             ((1 << S_FACTOR) / ((1 << M_BITS) - errrate));
 3315 
 3316         return (uint32_t)(res >> S_FACTOR);
 3317 #undef M_BITS
 3318 #undef S_FACTOR
 3319 }
 3320 
 3321 /*
 3322  * Add a Mesh Link Metric report IE to a frame.
 3323  */
 3324 uint8_t *
 3325 ieee80211_add_meshlmetric(uint8_t *frm, uint8_t flags, uint32_t metric)
 3326 {
 3327         *frm++ = IEEE80211_ELEMID_MESHLINK;
 3328         *frm++ = 5;
 3329         *frm++ = flags;
 3330         ADDWORD(frm, metric);
 3331         return frm;
 3332 }
 3333 
 3334 /*
 3335  * Add a Mesh Gate Announcement IE to a frame.
 3336  */
 3337 uint8_t *
 3338 ieee80211_add_meshgate(uint8_t *frm, struct ieee80211_meshgann_ie *ie)
 3339 {
 3340         *frm++ = IEEE80211_ELEMID_MESHGANN; /* ie */
 3341         *frm++ = IEEE80211_MESHGANN_BASE_SZ; /* len */
 3342         *frm++ = ie->gann_flags;
 3343         *frm++ = ie->gann_hopcount;
 3344         *frm++ = ie->gann_ttl;
 3345         IEEE80211_ADDR_COPY(frm, ie->gann_addr);
 3346         frm += 6;
 3347         ADDWORD(frm, ie->gann_seq);
 3348         ADDSHORT(frm, ie->gann_interval);
 3349         return frm;
 3350 }
 3351 #undef ADDSHORT
 3352 #undef ADDWORD
 3353 
 3354 /*
 3355  * Initialize any mesh-specific node state.
 3356  */
 3357 void
 3358 ieee80211_mesh_node_init(struct ieee80211vap *vap, struct ieee80211_node *ni)
 3359 {
 3360         ni->ni_flags |= IEEE80211_NODE_QOS;
 3361         callout_init(&ni->ni_mltimer, 1);
 3362         callout_init(&ni->ni_mlhtimer, 1);
 3363 }
 3364 
 3365 /*
 3366  * Cleanup any mesh-specific node state.
 3367  */
 3368 void
 3369 ieee80211_mesh_node_cleanup(struct ieee80211_node *ni)
 3370 {
 3371         struct ieee80211vap *vap = ni->ni_vap;
 3372         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 3373 
 3374         callout_drain(&ni->ni_mltimer);
 3375         callout_drain(&ni->ni_mlhtimer);
 3376         /* NB: short-circuit callbacks after mesh_vdetach */
 3377         if (vap->iv_mesh != NULL)
 3378                 ms->ms_ppath->mpp_peerdown(ni);
 3379 }
 3380 
 3381 void
 3382 ieee80211_parse_meshid(struct ieee80211_node *ni, const uint8_t *ie)
 3383 {
 3384         ni->ni_meshidlen = ie[1];
 3385         memcpy(ni->ni_meshid, ie + 2, ie[1]);
 3386 }
 3387 
 3388 /*
 3389  * Setup mesh-specific node state on neighbor discovery.
 3390  */
 3391 void
 3392 ieee80211_mesh_init_neighbor(struct ieee80211_node *ni,
 3393         const struct ieee80211_frame *wh,
 3394         const struct ieee80211_scanparams *sp)
 3395 {
 3396         ieee80211_parse_meshid(ni, sp->meshid);
 3397 }
 3398 
 3399 void
 3400 ieee80211_mesh_update_beacon(struct ieee80211vap *vap,
 3401         struct ieee80211_beacon_offsets *bo)
 3402 {
 3403         KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap"));
 3404 
 3405         if (isset(bo->bo_flags, IEEE80211_BEACON_MESHCONF)) {
 3406                 (void)ieee80211_add_meshconf(bo->bo_meshconf, vap);
 3407                 clrbit(bo->bo_flags, IEEE80211_BEACON_MESHCONF);
 3408         }
 3409 }
 3410 
 3411 static int
 3412 mesh_ioctl_get80211(struct ieee80211vap *vap, struct ieee80211req *ireq)
 3413 {
 3414         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 3415         uint8_t tmpmeshid[IEEE80211_NWID_LEN];
 3416         struct ieee80211_mesh_route *rt;
 3417         struct ieee80211req_mesh_route *imr;
 3418         size_t len, off;
 3419         uint8_t *p;
 3420         int error;
 3421 
 3422         if (vap->iv_opmode != IEEE80211_M_MBSS)
 3423                 return ENOSYS;
 3424 
 3425         error = 0;
 3426         switch (ireq->i_type) {
 3427         case IEEE80211_IOC_MESH_ID:
 3428                 ireq->i_len = ms->ms_idlen;
 3429                 memcpy(tmpmeshid, ms->ms_id, ireq->i_len);
 3430                 error = copyout(tmpmeshid, ireq->i_data, ireq->i_len);
 3431                 break;
 3432         case IEEE80211_IOC_MESH_AP:
 3433                 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_AP) != 0;
 3434                 break;
 3435         case IEEE80211_IOC_MESH_FWRD:
 3436                 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) != 0;
 3437                 break;
 3438         case IEEE80211_IOC_MESH_GATE:
 3439                 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) != 0;
 3440                 break;
 3441         case IEEE80211_IOC_MESH_TTL:
 3442                 ireq->i_val = ms->ms_ttl;
 3443                 break;
 3444         case IEEE80211_IOC_MESH_RTCMD:
 3445                 switch (ireq->i_val) {
 3446                 case IEEE80211_MESH_RTCMD_LIST:
 3447                         len = 0;
 3448                         MESH_RT_LOCK(ms);
 3449                         TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) {
 3450                                 len += sizeof(*imr);
 3451                         }
 3452                         MESH_RT_UNLOCK(ms);
 3453                         if (len > ireq->i_len || ireq->i_len < sizeof(*imr)) {
 3454                                 ireq->i_len = len;
 3455                                 return ENOMEM;
 3456                         }
 3457                         ireq->i_len = len;
 3458                         /* XXX M_WAIT? */
 3459                         p = IEEE80211_MALLOC(len, M_TEMP,
 3460                             IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
 3461                         if (p == NULL)
 3462                                 return ENOMEM;
 3463                         off = 0;
 3464                         MESH_RT_LOCK(ms);
 3465                         TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) {
 3466                                 if (off >= len)
 3467                                         break;
 3468                                 imr = (struct ieee80211req_mesh_route *)
 3469                                     (p + off);
 3470                                 IEEE80211_ADDR_COPY(imr->imr_dest,
 3471                                     rt->rt_dest);
 3472                                 IEEE80211_ADDR_COPY(imr->imr_nexthop,
 3473                                     rt->rt_nexthop);
 3474                                 imr->imr_metric = rt->rt_metric;
 3475                                 imr->imr_nhops = rt->rt_nhops;
 3476                                 imr->imr_lifetime =
 3477                                     ieee80211_mesh_rt_update(rt, 0);
 3478                                 imr->imr_lastmseq = rt->rt_lastmseq;
 3479                                 imr->imr_flags = rt->rt_flags; /* last */
 3480                                 off += sizeof(*imr);
 3481                         }
 3482                         MESH_RT_UNLOCK(ms);
 3483                         error = copyout(p, (uint8_t *)ireq->i_data,
 3484                             ireq->i_len);
 3485                         IEEE80211_FREE(p, M_TEMP);
 3486                         break;
 3487                 case IEEE80211_MESH_RTCMD_FLUSH:
 3488                 case IEEE80211_MESH_RTCMD_ADD:
 3489                 case IEEE80211_MESH_RTCMD_DELETE:
 3490                         return EINVAL;
 3491                 default:
 3492                         return ENOSYS;
 3493                 }
 3494                 break;
 3495         case IEEE80211_IOC_MESH_PR_METRIC:
 3496                 len = strlen(ms->ms_pmetric->mpm_descr);
 3497                 if (ireq->i_len < len)
 3498                         return EINVAL;
 3499                 ireq->i_len = len;
 3500                 error = copyout(ms->ms_pmetric->mpm_descr,
 3501                     (uint8_t *)ireq->i_data, len);
 3502                 break;
 3503         case IEEE80211_IOC_MESH_PR_PATH:
 3504                 len = strlen(ms->ms_ppath->mpp_descr);
 3505                 if (ireq->i_len < len)
 3506                         return EINVAL;
 3507                 ireq->i_len = len;
 3508                 error = copyout(ms->ms_ppath->mpp_descr,
 3509                     (uint8_t *)ireq->i_data, len);
 3510                 break;
 3511         default:
 3512                 return ENOSYS;
 3513         }
 3514 
 3515         return error;
 3516 }
 3517 IEEE80211_IOCTL_GET(mesh, mesh_ioctl_get80211);
 3518 
 3519 static int
 3520 mesh_ioctl_set80211(struct ieee80211vap *vap, struct ieee80211req *ireq)
 3521 {
 3522         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 3523         uint8_t tmpmeshid[IEEE80211_NWID_LEN];
 3524         uint8_t tmpaddr[IEEE80211_ADDR_LEN];
 3525         char tmpproto[IEEE80211_MESH_PROTO_DSZ];
 3526         int error;
 3527 
 3528         if (vap->iv_opmode != IEEE80211_M_MBSS)
 3529                 return ENOSYS;
 3530 
 3531         error = 0;
 3532         switch (ireq->i_type) {
 3533         case IEEE80211_IOC_MESH_ID:
 3534                 if (ireq->i_val != 0 || ireq->i_len > IEEE80211_MESHID_LEN)
 3535                         return EINVAL;
 3536                 error = copyin(ireq->i_data, tmpmeshid, ireq->i_len);
 3537                 if (error != 0)
 3538                         break;
 3539                 memset(ms->ms_id, 0, IEEE80211_NWID_LEN);
 3540                 ms->ms_idlen = ireq->i_len;
 3541                 memcpy(ms->ms_id, tmpmeshid, ireq->i_len);
 3542                 error = ENETRESET;
 3543                 break;
 3544         case IEEE80211_IOC_MESH_AP:
 3545                 if (ireq->i_val)
 3546                         ms->ms_flags |= IEEE80211_MESHFLAGS_AP;
 3547                 else
 3548                         ms->ms_flags &= ~IEEE80211_MESHFLAGS_AP;
 3549                 error = ENETRESET;
 3550                 break;
 3551         case IEEE80211_IOC_MESH_FWRD:
 3552                 if (ireq->i_val)
 3553                         ms->ms_flags |= IEEE80211_MESHFLAGS_FWD;
 3554                 else
 3555                         ms->ms_flags &= ~IEEE80211_MESHFLAGS_FWD;
 3556                 mesh_gatemode_setup(vap);
 3557                 break;
 3558         case IEEE80211_IOC_MESH_GATE:
 3559                 if (ireq->i_val)
 3560                         ms->ms_flags |= IEEE80211_MESHFLAGS_GATE;
 3561                 else
 3562                         ms->ms_flags &= ~IEEE80211_MESHFLAGS_GATE;
 3563                 break;
 3564         case IEEE80211_IOC_MESH_TTL:
 3565                 ms->ms_ttl = (uint8_t) ireq->i_val;
 3566                 break;
 3567         case IEEE80211_IOC_MESH_RTCMD:
 3568                 switch (ireq->i_val) {
 3569                 case IEEE80211_MESH_RTCMD_LIST:
 3570                         return EINVAL;
 3571                 case IEEE80211_MESH_RTCMD_FLUSH:
 3572                         ieee80211_mesh_rt_flush(vap);
 3573                         break;
 3574                 case IEEE80211_MESH_RTCMD_ADD:
 3575                         if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ireq->i_data) ||
 3576                             IEEE80211_ADDR_EQ(broadcastaddr, ireq->i_data))
 3577                                 return EINVAL;
 3578                         error = copyin(ireq->i_data, &tmpaddr,
 3579                             IEEE80211_ADDR_LEN);
 3580                         if (error == 0)
 3581                                 ieee80211_mesh_discover(vap, tmpaddr, NULL);
 3582                         break;
 3583                 case IEEE80211_MESH_RTCMD_DELETE:
 3584                         ieee80211_mesh_rt_del(vap, ireq->i_data);
 3585                         break;
 3586                 default:
 3587                         return ENOSYS;
 3588                 }
 3589                 break;
 3590         case IEEE80211_IOC_MESH_PR_METRIC:
 3591                 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto));
 3592                 if (error == 0) {
 3593                         error = mesh_select_proto_metric(vap, tmpproto);
 3594                         if (error == 0)
 3595                                 error = ENETRESET;
 3596                 }
 3597                 break;
 3598         case IEEE80211_IOC_MESH_PR_PATH:
 3599                 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto));
 3600                 if (error == 0) {
 3601                         error = mesh_select_proto_path(vap, tmpproto);
 3602                         if (error == 0)
 3603                                 error = ENETRESET;
 3604                 }
 3605                 break;
 3606         default:
 3607                 return ENOSYS;
 3608         }
 3609         return error;
 3610 }
 3611 IEEE80211_IOCTL_SET(mesh, mesh_ioctl_set80211);

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