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  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
    3  *
    4  * Copyright (c) 2009 The FreeBSD Foundation 
    5  * 
    6  * This software was developed by Rui Paulo under sponsorship from the
    7  * FreeBSD Foundation. 
    8  *  
    9  * Redistribution and use in source and binary forms, with or without 
   10  * modification, are permitted provided that the following conditions 
   11  * are met: 
   12  * 1. Redistributions of source code must retain the above copyright 
   13  *    notice, this list of conditions and the following disclaimer. 
   14  * 2. Redistributions in binary form must reproduce the above copyright 
   15  *    notice, this list of conditions and the following disclaimer in the 
   16  *    documentation and/or other materials provided with the distribution. 
   17  * 
   18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 
   19  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
   20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
   21  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 
   22  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 
   23  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 
   24  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 
   25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 
   26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 
   27  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 
   28  * SUCH DAMAGE. 
   29  */ 
   30 #include <sys/cdefs.h>
   31 #ifdef __FreeBSD__
   32 __FBSDID("$FreeBSD$");
   33 #endif
   34 
   35 /*
   36  * IEEE 802.11s Mesh Point (MBSS) support.
   37  *
   38  * Based on March 2009, D3.0 802.11s draft spec.
   39  */
   40 #include "opt_inet.h"
   41 #include "opt_wlan.h"
   42 
   43 #include <sys/param.h>
   44 #include <sys/systm.h> 
   45 #include <sys/mbuf.h>   
   46 #include <sys/malloc.h>
   47 #include <sys/kernel.h>
   48 
   49 #include <sys/socket.h>
   50 #include <sys/sockio.h>
   51 #include <sys/endian.h>
   52 #include <sys/errno.h>
   53 #include <sys/proc.h>
   54 #include <sys/sysctl.h>
   55 
   56 #include <net/bpf.h>
   57 #include <net/if.h>
   58 #include <net/if_var.h>
   59 #include <net/if_media.h>
   60 #include <net/if_llc.h>
   61 #include <net/ethernet.h>
   62 
   63 #include <net80211/ieee80211_var.h>
   64 #include <net80211/ieee80211_action.h>
   65 #ifdef IEEE80211_SUPPORT_SUPERG
   66 #include <net80211/ieee80211_superg.h>
   67 #endif
   68 #include <net80211/ieee80211_input.h>
   69 #include <net80211/ieee80211_mesh.h>
   70 
   71 static void     mesh_rt_flush_invalid(struct ieee80211vap *);
   72 static int      mesh_select_proto_path(struct ieee80211vap *, const char *);
   73 static int      mesh_select_proto_metric(struct ieee80211vap *, const char *);
   74 static void     mesh_vattach(struct ieee80211vap *);
   75 static int      mesh_newstate(struct ieee80211vap *, enum ieee80211_state, int);
   76 static void     mesh_rt_cleanup_cb(void *);
   77 static void     mesh_gatemode_setup(struct ieee80211vap *);
   78 static void     mesh_gatemode_cb(void *);
   79 static void     mesh_linkchange(struct ieee80211_node *,
   80                     enum ieee80211_mesh_mlstate);
   81 static void     mesh_checkid(void *, struct ieee80211_node *);
   82 static uint32_t mesh_generateid(struct ieee80211vap *);
   83 static int      mesh_checkpseq(struct ieee80211vap *,
   84                     const uint8_t [IEEE80211_ADDR_LEN], uint32_t);
   85 static void     mesh_transmit_to_gate(struct ieee80211vap *, struct mbuf *,
   86                     struct ieee80211_mesh_route *);
   87 static void     mesh_forward(struct ieee80211vap *, struct mbuf *,
   88                     const struct ieee80211_meshcntl *);
   89 static int      mesh_input(struct ieee80211_node *, struct mbuf *,
   90                     const struct ieee80211_rx_stats *rxs, int, int);
   91 static void     mesh_recv_mgmt(struct ieee80211_node *, struct mbuf *, int,
   92                     const struct ieee80211_rx_stats *rxs, int, int);
   93 static void     mesh_recv_ctl(struct ieee80211_node *, struct mbuf *, int);
   94 static void     mesh_peer_timeout_setup(struct ieee80211_node *);
   95 static void     mesh_peer_timeout_backoff(struct ieee80211_node *);
   96 static void     mesh_peer_timeout_cb(void *);
   97 static __inline void
   98                 mesh_peer_timeout_stop(struct ieee80211_node *);
   99 static int      mesh_verify_meshid(struct ieee80211vap *, const uint8_t *);
  100 static int      mesh_verify_meshconf(struct ieee80211vap *, const uint8_t *);
  101 static int      mesh_verify_meshpeer(struct ieee80211vap *, uint8_t,
  102                     const uint8_t *);
  103 uint32_t        mesh_airtime_calc(struct ieee80211_node *);
  104 
  105 /*
  106  * Timeout values come from the specification and are in milliseconds.
  107  */
  108 static SYSCTL_NODE(_net_wlan, OID_AUTO, mesh, CTLFLAG_RD | CTLFLAG_MPSAFE, 0,
  109     "IEEE 802.11s parameters");
  110 static int      ieee80211_mesh_gateint = -1;
  111 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, gateint,
  112     CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
  113     &ieee80211_mesh_gateint, 0, ieee80211_sysctl_msecs_ticks, "I",
  114     "mesh gate interval (ms)");
  115 static int ieee80211_mesh_retrytimeout = -1;
  116 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, retrytimeout,
  117     CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
  118     &ieee80211_mesh_retrytimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
  119     "Retry timeout (msec)");
  120 static int ieee80211_mesh_holdingtimeout = -1;
  121 
  122 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, holdingtimeout,
  123     CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
  124     &ieee80211_mesh_holdingtimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
  125     "Holding state timeout (msec)");
  126 static int ieee80211_mesh_confirmtimeout = -1;
  127 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, confirmtimeout,
  128     CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
  129     &ieee80211_mesh_confirmtimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
  130     "Confirm state timeout (msec)");
  131 static int ieee80211_mesh_backofftimeout = -1;
  132 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, backofftimeout,
  133     CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
  134     &ieee80211_mesh_backofftimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
  135     "Backoff timeout (msec). This is to throutles peering forever when "
  136     "not receiving answer or is rejected by a neighbor");
  137 static int ieee80211_mesh_maxretries = 2;
  138 SYSCTL_INT(_net_wlan_mesh, OID_AUTO, maxretries, CTLFLAG_RW,
  139     &ieee80211_mesh_maxretries, 0,
  140     "Maximum retries during peer link establishment");
  141 static int ieee80211_mesh_maxholding = 2;
  142 SYSCTL_INT(_net_wlan_mesh, OID_AUTO, maxholding, CTLFLAG_RW,
  143     &ieee80211_mesh_maxholding, 0,
  144     "Maximum times we are allowed to transition to HOLDING state before "
  145     "backinoff during peer link establishment");
  146 
  147 static const uint8_t broadcastaddr[IEEE80211_ADDR_LEN] =
  148         { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
  149 
  150 static  ieee80211_recv_action_func mesh_recv_action_meshpeering_open;
  151 static  ieee80211_recv_action_func mesh_recv_action_meshpeering_confirm;
  152 static  ieee80211_recv_action_func mesh_recv_action_meshpeering_close;
  153 static  ieee80211_recv_action_func mesh_recv_action_meshlmetric;
  154 static  ieee80211_recv_action_func mesh_recv_action_meshgate;
  155 
  156 static  ieee80211_send_action_func mesh_send_action_meshpeering_open;
  157 static  ieee80211_send_action_func mesh_send_action_meshpeering_confirm;
  158 static  ieee80211_send_action_func mesh_send_action_meshpeering_close;
  159 static  ieee80211_send_action_func mesh_send_action_meshlmetric;
  160 static  ieee80211_send_action_func mesh_send_action_meshgate;
  161 
  162 static const struct ieee80211_mesh_proto_metric mesh_metric_airtime = {
  163         .mpm_descr      = "AIRTIME",
  164         .mpm_ie         = IEEE80211_MESHCONF_METRIC_AIRTIME,
  165         .mpm_metric     = mesh_airtime_calc,
  166 };
  167 
  168 static struct ieee80211_mesh_proto_path         mesh_proto_paths[4];
  169 static struct ieee80211_mesh_proto_metric       mesh_proto_metrics[4];
  170 
  171 MALLOC_DEFINE(M_80211_MESH_PREQ, "80211preq", "802.11 MESH Path Request frame");
  172 MALLOC_DEFINE(M_80211_MESH_PREP, "80211prep", "802.11 MESH Path Reply frame");
  173 MALLOC_DEFINE(M_80211_MESH_PERR, "80211perr", "802.11 MESH Path Error frame");
  174 
  175 /* The longer one of the lifetime should be stored as new lifetime */
  176 #define MESH_ROUTE_LIFETIME_MAX(a, b)   (a > b ? a : b)
  177 
  178 MALLOC_DEFINE(M_80211_MESH_RT, "80211mesh_rt", "802.11s routing table");
  179 MALLOC_DEFINE(M_80211_MESH_GT_RT, "80211mesh_gt", "802.11s known gates table");
  180 
  181 /*
  182  * Helper functions to manipulate the Mesh routing table.
  183  */
  184 
  185 static struct ieee80211_mesh_route *
  186 mesh_rt_find_locked(struct ieee80211_mesh_state *ms,
  187     const uint8_t dest[IEEE80211_ADDR_LEN])
  188 {
  189         struct ieee80211_mesh_route *rt;
  190 
  191         MESH_RT_LOCK_ASSERT(ms);
  192 
  193         TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) {
  194                 if (IEEE80211_ADDR_EQ(dest, rt->rt_dest))
  195                         return rt;
  196         }
  197         return NULL;
  198 }
  199 
  200 static struct ieee80211_mesh_route *
  201 mesh_rt_add_locked(struct ieee80211vap *vap,
  202     const uint8_t dest[IEEE80211_ADDR_LEN])
  203 {
  204         struct ieee80211_mesh_state *ms = vap->iv_mesh;
  205         struct ieee80211_mesh_route *rt;
  206 
  207         KASSERT(!IEEE80211_ADDR_EQ(broadcastaddr, dest),
  208             ("%s: adding broadcast to the routing table", __func__));
  209 
  210         MESH_RT_LOCK_ASSERT(ms);
  211 
  212         rt = IEEE80211_MALLOC(ALIGN(sizeof(struct ieee80211_mesh_route)) +
  213             ms->ms_ppath->mpp_privlen, M_80211_MESH_RT,
  214             IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
  215         if (rt != NULL) {
  216                 rt->rt_vap = vap;
  217                 IEEE80211_ADDR_COPY(rt->rt_dest, dest);
  218                 rt->rt_priv = (void *)ALIGN(&rt[1]);
  219                 MESH_RT_ENTRY_LOCK_INIT(rt, "MBSS_RT");
  220                 callout_init(&rt->rt_discovery, 1);
  221                 rt->rt_updtime = ticks; /* create time */
  222                 TAILQ_INSERT_TAIL(&ms->ms_routes, rt, rt_next);
  223         }
  224         return rt;
  225 }
  226 
  227 struct ieee80211_mesh_route *
  228 ieee80211_mesh_rt_find(struct ieee80211vap *vap,
  229     const uint8_t dest[IEEE80211_ADDR_LEN])
  230 {
  231         struct ieee80211_mesh_state *ms = vap->iv_mesh;
  232         struct ieee80211_mesh_route *rt;
  233 
  234         MESH_RT_LOCK(ms);
  235         rt = mesh_rt_find_locked(ms, dest);
  236         MESH_RT_UNLOCK(ms);
  237         return rt;
  238 }
  239 
  240 struct ieee80211_mesh_route *
  241 ieee80211_mesh_rt_add(struct ieee80211vap *vap,
  242     const uint8_t dest[IEEE80211_ADDR_LEN])
  243 {
  244         struct ieee80211_mesh_state *ms = vap->iv_mesh;
  245         struct ieee80211_mesh_route *rt;
  246 
  247         KASSERT(ieee80211_mesh_rt_find(vap, dest) == NULL,
  248             ("%s: duplicate entry in the routing table", __func__));
  249         KASSERT(!IEEE80211_ADDR_EQ(vap->iv_myaddr, dest),
  250             ("%s: adding self to the routing table", __func__));
  251 
  252         MESH_RT_LOCK(ms);
  253         rt = mesh_rt_add_locked(vap, dest);
  254         MESH_RT_UNLOCK(ms);
  255         return rt;
  256 }
  257 
  258 /*
  259  * Update the route lifetime and returns the updated lifetime.
  260  * If new_lifetime is zero and route is timedout it will be invalidated.
  261  * new_lifetime is in msec
  262  */
  263 int
  264 ieee80211_mesh_rt_update(struct ieee80211_mesh_route *rt, int new_lifetime)
  265 {
  266         int timesince, now;
  267         uint32_t lifetime = 0;
  268 
  269         KASSERT(rt != NULL, ("route is NULL"));
  270 
  271         now = ticks;
  272         MESH_RT_ENTRY_LOCK(rt);
  273 
  274         /* dont clobber a proxy entry gated by us */
  275         if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY && rt->rt_nhops == 0) {
  276                 MESH_RT_ENTRY_UNLOCK(rt);
  277                 return rt->rt_lifetime;
  278         }
  279 
  280         timesince = ticks_to_msecs(now - rt->rt_updtime);
  281         rt->rt_updtime = now;
  282         if (timesince >= rt->rt_lifetime) {
  283                 if (new_lifetime != 0) {
  284                         rt->rt_lifetime = new_lifetime;
  285                 }
  286                 else {
  287                         rt->rt_flags &= ~IEEE80211_MESHRT_FLAGS_VALID;
  288                         rt->rt_lifetime = 0;
  289                 }
  290         } else {
  291                 /* update what is left of lifetime */
  292                 rt->rt_lifetime = rt->rt_lifetime - timesince;
  293                 rt->rt_lifetime  = MESH_ROUTE_LIFETIME_MAX(
  294                         new_lifetime, rt->rt_lifetime);
  295         }
  296         lifetime = rt->rt_lifetime;
  297         MESH_RT_ENTRY_UNLOCK(rt);
  298 
  299         return lifetime;
  300 }
  301 
  302 /*
  303  * Add a proxy route (as needed) for the specified destination.
  304  */
  305 void
  306 ieee80211_mesh_proxy_check(struct ieee80211vap *vap,
  307     const uint8_t dest[IEEE80211_ADDR_LEN])
  308 {
  309         struct ieee80211_mesh_state *ms = vap->iv_mesh;
  310         struct ieee80211_mesh_route *rt;
  311 
  312         MESH_RT_LOCK(ms);
  313         rt = mesh_rt_find_locked(ms, dest);
  314         if (rt == NULL) {
  315                 rt = mesh_rt_add_locked(vap, dest);
  316                 if (rt == NULL) {
  317                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
  318                             "%s", "unable to add proxy entry");
  319                         vap->iv_stats.is_mesh_rtaddfailed++;
  320                 } else {
  321                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
  322                             "%s", "add proxy entry");
  323                         IEEE80211_ADDR_COPY(rt->rt_mesh_gate, vap->iv_myaddr);
  324                         IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr);
  325                         rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID
  326                                      |  IEEE80211_MESHRT_FLAGS_PROXY;
  327                 }
  328         } else if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) {
  329                 KASSERT(rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY,
  330                     ("no proxy flag for poxy entry"));
  331                 struct ieee80211com *ic = vap->iv_ic;
  332                 /*
  333                  * Fix existing entry created by received frames from
  334                  * stations that have some memory of dest.  We also
  335                  * flush any frames held on the staging queue; delivering
  336                  * them is too much trouble right now.
  337                  */
  338                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
  339                     "%s", "fix proxy entry");
  340                 IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr);
  341                 rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID
  342                              |  IEEE80211_MESHRT_FLAGS_PROXY;
  343                 /* XXX belongs in hwmp */
  344                 ieee80211_ageq_drain_node(&ic->ic_stageq,
  345                    (void *)(uintptr_t) ieee80211_mac_hash(ic, dest));
  346                 /* XXX stat? */
  347         }
  348         MESH_RT_UNLOCK(ms);
  349 }
  350 
  351 static __inline void
  352 mesh_rt_del(struct ieee80211_mesh_state *ms, struct ieee80211_mesh_route *rt)
  353 {
  354         TAILQ_REMOVE(&ms->ms_routes, rt, rt_next);
  355         /*
  356          * Grab the lock before destroying it, to be sure no one else
  357          * is holding the route.
  358          */
  359         MESH_RT_ENTRY_LOCK(rt);
  360         callout_drain(&rt->rt_discovery);
  361         MESH_RT_ENTRY_LOCK_DESTROY(rt);
  362         IEEE80211_FREE(rt, M_80211_MESH_RT);
  363 }
  364 
  365 void
  366 ieee80211_mesh_rt_del(struct ieee80211vap *vap,
  367     const uint8_t dest[IEEE80211_ADDR_LEN])
  368 {
  369         struct ieee80211_mesh_state *ms = vap->iv_mesh;
  370         struct ieee80211_mesh_route *rt, *next;
  371 
  372         MESH_RT_LOCK(ms);
  373         TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) {
  374                 if (IEEE80211_ADDR_EQ(rt->rt_dest, dest)) {
  375                         if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) {
  376                                 ms->ms_ppath->mpp_senderror(vap, dest, rt,
  377                                     IEEE80211_REASON_MESH_PERR_NO_PROXY);
  378                         } else {
  379                                 ms->ms_ppath->mpp_senderror(vap, dest, rt,
  380                                     IEEE80211_REASON_MESH_PERR_DEST_UNREACH);
  381                         }
  382                         mesh_rt_del(ms, rt);
  383                         MESH_RT_UNLOCK(ms);
  384                         return;
  385                 }
  386         }
  387         MESH_RT_UNLOCK(ms);
  388 }
  389 
  390 void
  391 ieee80211_mesh_rt_flush(struct ieee80211vap *vap)
  392 {
  393         struct ieee80211_mesh_state *ms = vap->iv_mesh;
  394         struct ieee80211_mesh_route *rt, *next;
  395 
  396         if (ms == NULL)
  397                 return;
  398         MESH_RT_LOCK(ms);
  399         TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next)
  400                 mesh_rt_del(ms, rt);
  401         MESH_RT_UNLOCK(ms);
  402 }
  403 
  404 void
  405 ieee80211_mesh_rt_flush_peer(struct ieee80211vap *vap,
  406     const uint8_t peer[IEEE80211_ADDR_LEN])
  407 {
  408         struct ieee80211_mesh_state *ms = vap->iv_mesh;
  409         struct ieee80211_mesh_route *rt, *next;
  410 
  411         MESH_RT_LOCK(ms);
  412         TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) {
  413                 if (IEEE80211_ADDR_EQ(rt->rt_nexthop, peer))
  414                         mesh_rt_del(ms, rt);
  415         }
  416         MESH_RT_UNLOCK(ms);
  417 }
  418 
  419 /*
  420  * Flush expired routing entries, i.e. those in invalid state for
  421  * some time.
  422  */
  423 static void
  424 mesh_rt_flush_invalid(struct ieee80211vap *vap)
  425 {
  426         struct ieee80211_mesh_state *ms = vap->iv_mesh;
  427         struct ieee80211_mesh_route *rt, *next;
  428 
  429         if (ms == NULL)
  430                 return;
  431         MESH_RT_LOCK(ms);
  432         TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) {
  433                 /* Discover paths will be deleted by their own callout */
  434                 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_DISCOVER)
  435                         continue;
  436                 ieee80211_mesh_rt_update(rt, 0);
  437                 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0)
  438                         mesh_rt_del(ms, rt);
  439         }
  440         MESH_RT_UNLOCK(ms);
  441 }
  442 
  443 int
  444 ieee80211_mesh_register_proto_path(const struct ieee80211_mesh_proto_path *mpp)
  445 {
  446         int i, firstempty = -1;
  447 
  448         for (i = 0; i < nitems(mesh_proto_paths); i++) {
  449                 if (strncmp(mpp->mpp_descr, mesh_proto_paths[i].mpp_descr,
  450                     IEEE80211_MESH_PROTO_DSZ) == 0)
  451                         return EEXIST;
  452                 if (!mesh_proto_paths[i].mpp_active && firstempty == -1)
  453                         firstempty = i;
  454         }
  455         if (firstempty < 0)
  456                 return ENOSPC;
  457         memcpy(&mesh_proto_paths[firstempty], mpp, sizeof(*mpp));
  458         mesh_proto_paths[firstempty].mpp_active = 1;
  459         return 0;
  460 }
  461 
  462 int
  463 ieee80211_mesh_register_proto_metric(const struct
  464     ieee80211_mesh_proto_metric *mpm)
  465 {
  466         int i, firstempty = -1;
  467 
  468         for (i = 0; i < nitems(mesh_proto_metrics); i++) {
  469                 if (strncmp(mpm->mpm_descr, mesh_proto_metrics[i].mpm_descr,
  470                     IEEE80211_MESH_PROTO_DSZ) == 0)
  471                         return EEXIST;
  472                 if (!mesh_proto_metrics[i].mpm_active && firstempty == -1)
  473                         firstempty = i;
  474         }
  475         if (firstempty < 0)
  476                 return ENOSPC;
  477         memcpy(&mesh_proto_metrics[firstempty], mpm, sizeof(*mpm));
  478         mesh_proto_metrics[firstempty].mpm_active = 1;
  479         return 0;
  480 }
  481 
  482 static int
  483 mesh_select_proto_path(struct ieee80211vap *vap, const char *name)
  484 {
  485         struct ieee80211_mesh_state *ms = vap->iv_mesh;
  486         int i;
  487 
  488         for (i = 0; i < nitems(mesh_proto_paths); i++) {
  489                 if (strcasecmp(mesh_proto_paths[i].mpp_descr, name) == 0) {
  490                         ms->ms_ppath = &mesh_proto_paths[i];
  491                         return 0;
  492                 }
  493         }
  494         return ENOENT;
  495 }
  496 
  497 static int
  498 mesh_select_proto_metric(struct ieee80211vap *vap, const char *name)
  499 {
  500         struct ieee80211_mesh_state *ms = vap->iv_mesh;
  501         int i;
  502 
  503         for (i = 0; i < nitems(mesh_proto_metrics); i++) {
  504                 if (strcasecmp(mesh_proto_metrics[i].mpm_descr, name) == 0) {
  505                         ms->ms_pmetric = &mesh_proto_metrics[i];
  506                         return 0;
  507                 }
  508         }
  509         return ENOENT;
  510 }
  511 
  512 static void
  513 mesh_gatemode_setup(struct ieee80211vap *vap)
  514 {
  515         struct ieee80211_mesh_state *ms = vap->iv_mesh;
  516 
  517         /*
  518          * NB: When a mesh gate is running as a ROOT it shall
  519          * not send out periodic GANNs but instead mark the
  520          * mesh gate flag for the corresponding proactive PREQ
  521          * and RANN frames.
  522          */
  523         if (ms->ms_flags & IEEE80211_MESHFLAGS_ROOT ||
  524             (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) == 0) {
  525                 callout_drain(&ms->ms_gatetimer);
  526                 return ;
  527         }
  528         callout_reset(&ms->ms_gatetimer, ieee80211_mesh_gateint,
  529             mesh_gatemode_cb, vap);
  530 }
  531 
  532 static void
  533 mesh_gatemode_cb(void *arg)
  534 {
  535         struct ieee80211vap *vap = (struct ieee80211vap *)arg;
  536         struct ieee80211_mesh_state *ms = vap->iv_mesh;
  537         struct ieee80211_meshgann_ie gann;
  538 
  539         gann.gann_flags = 0; /* Reserved */
  540         gann.gann_hopcount = 0;
  541         gann.gann_ttl = ms->ms_ttl;
  542         IEEE80211_ADDR_COPY(gann.gann_addr, vap->iv_myaddr);
  543         gann.gann_seq = ms->ms_gateseq++;
  544         gann.gann_interval = ieee80211_mesh_gateint;
  545 
  546         IEEE80211_NOTE(vap, IEEE80211_MSG_MESH, vap->iv_bss,
  547             "send broadcast GANN (seq %u)", gann.gann_seq);
  548 
  549         ieee80211_send_action(vap->iv_bss, IEEE80211_ACTION_CAT_MESH,
  550             IEEE80211_ACTION_MESH_GANN, &gann);
  551         mesh_gatemode_setup(vap);
  552 }
  553 
  554 static void
  555 ieee80211_mesh_init(void)
  556 {
  557 
  558         memset(mesh_proto_paths, 0, sizeof(mesh_proto_paths));
  559         memset(mesh_proto_metrics, 0, sizeof(mesh_proto_metrics));
  560 
  561         /*
  562          * Setup mesh parameters that depends on the clock frequency.
  563          */
  564         ieee80211_mesh_gateint = msecs_to_ticks(10000);
  565         ieee80211_mesh_retrytimeout = msecs_to_ticks(40);
  566         ieee80211_mesh_holdingtimeout = msecs_to_ticks(40);
  567         ieee80211_mesh_confirmtimeout = msecs_to_ticks(40);
  568         ieee80211_mesh_backofftimeout = msecs_to_ticks(5000);
  569 
  570         /*
  571          * Register action frame handlers.
  572          */
  573         ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
  574             IEEE80211_ACTION_MESHPEERING_OPEN,
  575             mesh_recv_action_meshpeering_open);
  576         ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
  577             IEEE80211_ACTION_MESHPEERING_CONFIRM,
  578             mesh_recv_action_meshpeering_confirm);
  579         ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
  580             IEEE80211_ACTION_MESHPEERING_CLOSE,
  581             mesh_recv_action_meshpeering_close);
  582         ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESH,
  583             IEEE80211_ACTION_MESH_LMETRIC, mesh_recv_action_meshlmetric);
  584         ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESH,
  585             IEEE80211_ACTION_MESH_GANN, mesh_recv_action_meshgate);
  586 
  587         ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
  588             IEEE80211_ACTION_MESHPEERING_OPEN,
  589             mesh_send_action_meshpeering_open);
  590         ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
  591             IEEE80211_ACTION_MESHPEERING_CONFIRM,
  592             mesh_send_action_meshpeering_confirm);
  593         ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
  594             IEEE80211_ACTION_MESHPEERING_CLOSE,
  595             mesh_send_action_meshpeering_close);
  596         ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESH,
  597             IEEE80211_ACTION_MESH_LMETRIC,
  598             mesh_send_action_meshlmetric);
  599         ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESH,
  600             IEEE80211_ACTION_MESH_GANN,
  601             mesh_send_action_meshgate);
  602 
  603         /*
  604          * Register Airtime Link Metric.
  605          */
  606         ieee80211_mesh_register_proto_metric(&mesh_metric_airtime);
  607 
  608 }
  609 SYSINIT(wlan_mesh, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_mesh_init, NULL);
  610 
  611 void
  612 ieee80211_mesh_attach(struct ieee80211com *ic)
  613 {
  614         ic->ic_vattach[IEEE80211_M_MBSS] = mesh_vattach;
  615 }
  616 
  617 void
  618 ieee80211_mesh_detach(struct ieee80211com *ic)
  619 {
  620 }
  621 
  622 static void
  623 mesh_vdetach_peers(void *arg, struct ieee80211_node *ni)
  624 {
  625         struct ieee80211com *ic = ni->ni_ic;
  626         uint16_t args[3];
  627 
  628         if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED) {
  629                 args[0] = ni->ni_mlpid;
  630                 args[1] = ni->ni_mllid;
  631                 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
  632                 ieee80211_send_action(ni,
  633                     IEEE80211_ACTION_CAT_SELF_PROT,
  634                     IEEE80211_ACTION_MESHPEERING_CLOSE,
  635                     args);
  636         }
  637         callout_drain(&ni->ni_mltimer);
  638         /* XXX belongs in hwmp */
  639         ieee80211_ageq_drain_node(&ic->ic_stageq,
  640            (void *)(uintptr_t) ieee80211_mac_hash(ic, ni->ni_macaddr));
  641 }
  642 
  643 static void
  644 mesh_vdetach(struct ieee80211vap *vap)
  645 {
  646         struct ieee80211_mesh_state *ms = vap->iv_mesh;
  647 
  648         callout_drain(&ms->ms_cleantimer);
  649         ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_vdetach_peers,
  650             NULL);
  651         ieee80211_mesh_rt_flush(vap);
  652         MESH_RT_LOCK_DESTROY(ms);
  653         ms->ms_ppath->mpp_vdetach(vap);
  654         IEEE80211_FREE(vap->iv_mesh, M_80211_VAP);
  655         vap->iv_mesh = NULL;
  656 }
  657 
  658 static void
  659 mesh_vattach(struct ieee80211vap *vap)
  660 {
  661         struct ieee80211_mesh_state *ms;
  662         vap->iv_newstate = mesh_newstate;
  663         vap->iv_input = mesh_input;
  664         vap->iv_opdetach = mesh_vdetach;
  665         vap->iv_recv_mgmt = mesh_recv_mgmt;
  666         vap->iv_recv_ctl = mesh_recv_ctl;
  667         ms = IEEE80211_MALLOC(sizeof(struct ieee80211_mesh_state), M_80211_VAP,
  668             IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
  669         if (ms == NULL) {
  670                 printf("%s: couldn't alloc MBSS state\n", __func__);
  671                 return;
  672         }
  673         vap->iv_mesh = ms;
  674         ms->ms_seq = 0;
  675         ms->ms_flags = (IEEE80211_MESHFLAGS_AP | IEEE80211_MESHFLAGS_FWD);
  676         ms->ms_ttl = IEEE80211_MESH_DEFAULT_TTL;
  677         TAILQ_INIT(&ms->ms_known_gates);
  678         TAILQ_INIT(&ms->ms_routes);
  679         MESH_RT_LOCK_INIT(ms, "MBSS");
  680         callout_init(&ms->ms_cleantimer, 1);
  681         callout_init(&ms->ms_gatetimer, 1);
  682         ms->ms_gateseq = 0;
  683         mesh_select_proto_metric(vap, "AIRTIME");
  684         KASSERT(ms->ms_pmetric, ("ms_pmetric == NULL"));
  685         mesh_select_proto_path(vap, "HWMP");
  686         KASSERT(ms->ms_ppath, ("ms_ppath == NULL"));
  687         ms->ms_ppath->mpp_vattach(vap);
  688 }
  689 
  690 /*
  691  * IEEE80211_M_MBSS vap state machine handler.
  692  */
  693 static int
  694 mesh_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
  695 {
  696         struct ieee80211_mesh_state *ms = vap->iv_mesh;
  697         struct ieee80211com *ic = vap->iv_ic;
  698         struct ieee80211_node *ni;
  699         enum ieee80211_state ostate;
  700 
  701         IEEE80211_LOCK_ASSERT(ic);
  702 
  703         ostate = vap->iv_state;
  704         IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n",
  705             __func__, ieee80211_state_name[ostate],
  706             ieee80211_state_name[nstate], arg);
  707         vap->iv_state = nstate;         /* state transition */
  708         if (ostate != IEEE80211_S_SCAN)
  709                 ieee80211_cancel_scan(vap);     /* background scan */
  710         ni = vap->iv_bss;                       /* NB: no reference held */
  711         if (nstate != IEEE80211_S_RUN && ostate == IEEE80211_S_RUN) {
  712                 callout_drain(&ms->ms_cleantimer);
  713                 callout_drain(&ms->ms_gatetimer);
  714         }
  715         switch (nstate) {
  716         case IEEE80211_S_INIT:
  717                 switch (ostate) {
  718                 case IEEE80211_S_SCAN:
  719                         ieee80211_cancel_scan(vap);
  720                         break;
  721                 case IEEE80211_S_CAC:
  722                         ieee80211_dfs_cac_stop(vap);
  723                         break;
  724                 case IEEE80211_S_RUN:
  725                         ieee80211_iterate_nodes(&ic->ic_sta,
  726                             mesh_vdetach_peers, NULL);
  727                         break;
  728                 default:
  729                         break;
  730                 }
  731                 if (ostate != IEEE80211_S_INIT) {
  732                         /* NB: optimize INIT -> INIT case */
  733                         ieee80211_reset_bss(vap);
  734                         ieee80211_mesh_rt_flush(vap);
  735                 }
  736                 break;
  737         case IEEE80211_S_SCAN:
  738                 switch (ostate) {
  739                 case IEEE80211_S_INIT:
  740                         if (vap->iv_des_chan != IEEE80211_CHAN_ANYC &&
  741                             !IEEE80211_IS_CHAN_RADAR(vap->iv_des_chan) &&
  742                             ms->ms_idlen != 0) {
  743                                 /*
  744                                  * Already have a channel and a mesh ID; bypass
  745                                  * the scan and startup immediately.
  746                                  */
  747                                 ieee80211_create_ibss(vap, vap->iv_des_chan);
  748                                 break;
  749                         }
  750                         /*
  751                          * Initiate a scan.  We can come here as a result
  752                          * of an IEEE80211_IOC_SCAN_REQ too in which case
  753                          * the vap will be marked with IEEE80211_FEXT_SCANREQ
  754                          * and the scan request parameters will be present
  755                          * in iv_scanreq.  Otherwise we do the default.
  756                         */
  757                         if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) {
  758                                 ieee80211_check_scan(vap,
  759                                     vap->iv_scanreq_flags,
  760                                     vap->iv_scanreq_duration,
  761                                     vap->iv_scanreq_mindwell,
  762                                     vap->iv_scanreq_maxdwell,
  763                                     vap->iv_scanreq_nssid, vap->iv_scanreq_ssid);
  764                                 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ;
  765                         } else
  766                                 ieee80211_check_scan_current(vap);
  767                         break;
  768                 default:
  769                         break;
  770                 }
  771                 break;
  772         case IEEE80211_S_CAC:
  773                 /*
  774                  * Start CAC on a DFS channel.  We come here when starting
  775                  * a bss on a DFS channel (see ieee80211_create_ibss).
  776                  */
  777                 ieee80211_dfs_cac_start(vap);
  778                 break;
  779         case IEEE80211_S_RUN:
  780                 switch (ostate) {
  781                 case IEEE80211_S_INIT:
  782                         /*
  783                          * Already have a channel; bypass the
  784                          * scan and startup immediately.
  785                          * Note that ieee80211_create_ibss will call
  786                          * back to do a RUN->RUN state change.
  787                          */
  788                         ieee80211_create_ibss(vap,
  789                             ieee80211_ht_adjust_channel(ic,
  790                                 ic->ic_curchan, vap->iv_flags_ht));
  791                         /* NB: iv_bss is changed on return */
  792                         break;
  793                 case IEEE80211_S_CAC:
  794                         /*
  795                          * NB: This is the normal state change when CAC
  796                          * expires and no radar was detected; no need to
  797                          * clear the CAC timer as it's already expired.
  798                          */
  799                         /* fall thru... */
  800                 case IEEE80211_S_CSA:
  801 #if 0
  802                         /*
  803                          * Shorten inactivity timer of associated stations
  804                          * to weed out sta's that don't follow a CSA.
  805                          */
  806                         ieee80211_iterate_nodes(&ic->ic_sta, sta_csa, vap);
  807 #endif
  808                         /*
  809                          * Update bss node channel to reflect where
  810                          * we landed after CSA.
  811                          */
  812                         ieee80211_node_set_chan(ni,
  813                             ieee80211_ht_adjust_channel(ic, ic->ic_curchan,
  814                                 ieee80211_htchanflags(ni->ni_chan)));
  815                         /* XXX bypass debug msgs */
  816                         break;
  817                 case IEEE80211_S_SCAN:
  818                 case IEEE80211_S_RUN:
  819 #ifdef IEEE80211_DEBUG
  820                         if (ieee80211_msg_debug(vap)) {
  821                                 ieee80211_note(vap,
  822                                     "synchronized with %s meshid ",
  823                                     ether_sprintf(ni->ni_meshid));
  824                                 ieee80211_print_essid(ni->ni_meshid,
  825                                     ni->ni_meshidlen);
  826                                 /* XXX MCS/HT */
  827                                 printf(" channel %d\n",
  828                                     ieee80211_chan2ieee(ic, ic->ic_curchan));
  829                         }
  830 #endif
  831                         break;
  832                 default:
  833                         break;
  834                 }
  835                 ieee80211_node_authorize(ni);
  836                 callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact,
  837                     mesh_rt_cleanup_cb, vap);
  838                 mesh_gatemode_setup(vap);
  839                 break;
  840         default:
  841                 break;
  842         }
  843         /* NB: ostate not nstate */
  844         ms->ms_ppath->mpp_newstate(vap, ostate, arg);
  845         return 0;
  846 }
  847 
  848 static void
  849 mesh_rt_cleanup_cb(void *arg)
  850 {
  851         struct ieee80211vap *vap = arg;
  852         struct ieee80211_mesh_state *ms = vap->iv_mesh;
  853 
  854         mesh_rt_flush_invalid(vap);
  855         callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact,
  856             mesh_rt_cleanup_cb, vap);
  857 }
  858 
  859 /*
  860  * Mark a mesh STA as gate and return a pointer to it.
  861  * If this is first time, we create a new gate route.
  862  * Always update the path route to this mesh gate.
  863  */
  864 struct ieee80211_mesh_gate_route *
  865 ieee80211_mesh_mark_gate(struct ieee80211vap *vap, const uint8_t *addr,
  866     struct ieee80211_mesh_route *rt)
  867 {
  868         struct ieee80211_mesh_state *ms = vap->iv_mesh;
  869         struct ieee80211_mesh_gate_route *gr = NULL, *next;
  870         int found = 0;
  871 
  872         MESH_RT_LOCK(ms);
  873         TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) {
  874                 if (IEEE80211_ADDR_EQ(gr->gr_addr, addr)) {
  875                         found = 1;
  876                         break;
  877                 }
  878         }
  879 
  880         if (!found) {
  881                 /* New mesh gate add it to known table. */
  882                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, addr,
  883                     "%s", "stored new gate information from pro-PREQ.");
  884                 gr = IEEE80211_MALLOC(ALIGN(sizeof(struct ieee80211_mesh_gate_route)),
  885                     M_80211_MESH_GT_RT,
  886                     IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
  887                 IEEE80211_ADDR_COPY(gr->gr_addr, addr);
  888                 TAILQ_INSERT_TAIL(&ms->ms_known_gates, gr, gr_next);
  889         }
  890         gr->gr_route = rt;
  891         /* TODO: link from path route to gate route */
  892         MESH_RT_UNLOCK(ms);
  893 
  894         return gr;
  895 }
  896 
  897 /*
  898  * Helper function to note the Mesh Peer Link FSM change.
  899  */
  900 static void
  901 mesh_linkchange(struct ieee80211_node *ni, enum ieee80211_mesh_mlstate state)
  902 {
  903         struct ieee80211vap *vap = ni->ni_vap;
  904         struct ieee80211_mesh_state *ms = vap->iv_mesh;
  905 #ifdef IEEE80211_DEBUG
  906         static const char *meshlinkstates[] = {
  907                 [IEEE80211_NODE_MESH_IDLE]              = "IDLE",
  908                 [IEEE80211_NODE_MESH_OPENSNT]           = "OPEN SENT",
  909                 [IEEE80211_NODE_MESH_OPENRCV]           = "OPEN RECEIVED",
  910                 [IEEE80211_NODE_MESH_CONFIRMRCV]        = "CONFIRM RECEIVED",
  911                 [IEEE80211_NODE_MESH_ESTABLISHED]       = "ESTABLISHED",
  912                 [IEEE80211_NODE_MESH_HOLDING]           = "HOLDING"
  913         };
  914 #endif
  915         IEEE80211_NOTE(vap, IEEE80211_MSG_MESH,
  916             ni, "peer link: %s -> %s",
  917             meshlinkstates[ni->ni_mlstate], meshlinkstates[state]);
  918 
  919         /* track neighbor count */
  920         if (state == IEEE80211_NODE_MESH_ESTABLISHED &&
  921             ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) {
  922                 KASSERT(ms->ms_neighbors < 65535, ("neighbor count overflow"));
  923                 ms->ms_neighbors++;
  924                 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF);
  925         } else if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED &&
  926             state != IEEE80211_NODE_MESH_ESTABLISHED) {
  927                 KASSERT(ms->ms_neighbors > 0, ("neighbor count 0"));
  928                 ms->ms_neighbors--;
  929                 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF);
  930         }
  931         ni->ni_mlstate = state;
  932         switch (state) {
  933         case IEEE80211_NODE_MESH_HOLDING:
  934                 ms->ms_ppath->mpp_peerdown(ni);
  935                 break;
  936         case IEEE80211_NODE_MESH_ESTABLISHED:
  937                 ieee80211_mesh_discover(vap, ni->ni_macaddr, NULL);
  938                 break;
  939         default:
  940                 break;
  941         }
  942 }
  943 
  944 /*
  945  * Helper function to generate a unique local ID required for mesh
  946  * peer establishment.
  947  */
  948 static void
  949 mesh_checkid(void *arg, struct ieee80211_node *ni)
  950 {
  951         uint16_t *r = arg;
  952 
  953         if (*r == ni->ni_mllid)
  954                 *(uint16_t *)arg = 0;
  955 }
  956 
  957 static uint32_t
  958 mesh_generateid(struct ieee80211vap *vap)
  959 {
  960         int maxiter = 4;
  961         uint16_t r;
  962 
  963         do {
  964                 net80211_get_random_bytes(&r, 2);
  965                 ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_checkid, &r);
  966                 maxiter--;
  967         } while (r == 0 && maxiter > 0);
  968         return r;
  969 }
  970 
  971 /*
  972  * Verifies if we already received this packet by checking its
  973  * sequence number.
  974  * Returns 0 if the frame is to be accepted, 1 otherwise.
  975  */
  976 static int
  977 mesh_checkpseq(struct ieee80211vap *vap,
  978     const uint8_t source[IEEE80211_ADDR_LEN], uint32_t seq)
  979 {
  980         struct ieee80211_mesh_route *rt;
  981 
  982         rt = ieee80211_mesh_rt_find(vap, source);
  983         if (rt == NULL) {
  984                 rt = ieee80211_mesh_rt_add(vap, source);
  985                 if (rt == NULL) {
  986                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source,
  987                             "%s", "add mcast route failed");
  988                         vap->iv_stats.is_mesh_rtaddfailed++;
  989                         return 1;
  990                 }
  991                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source,
  992                     "add mcast route, mesh seqno %d", seq);
  993                 rt->rt_lastmseq = seq;
  994                 return 0;
  995         }
  996         if (IEEE80211_MESH_SEQ_GEQ(rt->rt_lastmseq, seq)) {
  997                 return 1;
  998         } else {
  999                 rt->rt_lastmseq = seq;
 1000                 return 0;
 1001         }
 1002 }
 1003 
 1004 /*
 1005  * Iterate the routing table and locate the next hop.
 1006  */
 1007 struct ieee80211_node *
 1008 ieee80211_mesh_find_txnode(struct ieee80211vap *vap,
 1009     const uint8_t dest[IEEE80211_ADDR_LEN])
 1010 {
 1011         struct ieee80211_mesh_route *rt;
 1012 
 1013         rt = ieee80211_mesh_rt_find(vap, dest);
 1014         if (rt == NULL)
 1015                 return NULL;
 1016         if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) {
 1017                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
 1018                     "%s: !valid, flags 0x%x", __func__, rt->rt_flags);
 1019                 /* XXX stat */
 1020                 return NULL;
 1021         }
 1022         if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) {
 1023                 rt = ieee80211_mesh_rt_find(vap, rt->rt_mesh_gate);
 1024                 if (rt == NULL) return NULL;
 1025                 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) {
 1026                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
 1027                             "%s: meshgate !valid, flags 0x%x", __func__,
 1028                             rt->rt_flags);
 1029                         /* XXX stat */
 1030                         return NULL;
 1031                 }
 1032         }
 1033         return ieee80211_find_txnode(vap, rt->rt_nexthop);
 1034 }
 1035 
 1036 static void
 1037 mesh_transmit_to_gate(struct ieee80211vap *vap, struct mbuf *m,
 1038     struct ieee80211_mesh_route *rt_gate)
 1039 {
 1040         struct ifnet *ifp = vap->iv_ifp;
 1041         struct ieee80211_node *ni;
 1042 
 1043         IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
 1044 
 1045         ni = ieee80211_mesh_find_txnode(vap, rt_gate->rt_dest);
 1046         if (ni == NULL) {
 1047                 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
 1048                 m_freem(m);
 1049                 return;
 1050         }
 1051 
 1052         /*
 1053          * Send through the VAP packet transmit path.
 1054          * This consumes the node ref grabbed above and
 1055          * the mbuf, regardless of whether there's a problem
 1056          * or not.
 1057          */
 1058         (void) ieee80211_vap_pkt_send_dest(vap, m, ni);
 1059 }
 1060 
 1061 /*
 1062  * Forward the queued frames to known valid mesh gates.
 1063  * Assume destination to be outside the MBSS (i.e. proxy entry),
 1064  * If no valid mesh gates are known silently discard queued frames.
 1065  * After transmitting frames to all known valid mesh gates, this route
 1066  * will be marked invalid, and a new path discovery will happen in the hopes
 1067  * that (at least) one of the mesh gates have a new proxy entry for us to use.
 1068  */
 1069 void
 1070 ieee80211_mesh_forward_to_gates(struct ieee80211vap *vap,
 1071     struct ieee80211_mesh_route *rt_dest)
 1072 {
 1073         struct ieee80211com *ic = vap->iv_ic;
 1074         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 1075         struct ieee80211_mesh_route *rt_gate;
 1076         struct ieee80211_mesh_gate_route *gr = NULL, *gr_next;
 1077         struct mbuf *m, *mcopy, *next;
 1078 
 1079         IEEE80211_TX_UNLOCK_ASSERT(ic);
 1080 
 1081         KASSERT( rt_dest->rt_flags == IEEE80211_MESHRT_FLAGS_DISCOVER,
 1082             ("Route is not marked with IEEE80211_MESHRT_FLAGS_DISCOVER"));
 1083 
 1084         /* XXX: send to more than one valid mash gate */
 1085         MESH_RT_LOCK(ms);
 1086 
 1087         m = ieee80211_ageq_remove(&ic->ic_stageq,
 1088             (struct ieee80211_node *)(uintptr_t)
 1089             ieee80211_mac_hash(ic, rt_dest->rt_dest));
 1090 
 1091         TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, gr_next) {
 1092                 rt_gate = gr->gr_route;
 1093                 if (rt_gate == NULL) {
 1094                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP,
 1095                                 rt_dest->rt_dest,
 1096                                 "mesh gate with no path %6D",
 1097                                 gr->gr_addr, ":");
 1098                         continue;
 1099                 }
 1100                 if ((rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0)
 1101                         continue;
 1102                 KASSERT(rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_GATE,
 1103                     ("route not marked as a mesh gate"));
 1104                 KASSERT((rt_gate->rt_flags &
 1105                         IEEE80211_MESHRT_FLAGS_PROXY) == 0,
 1106                         ("found mesh gate that is also marked porxy"));
 1107                 /*
 1108                  * convert route to a proxy route gated by the current
 1109                  * mesh gate, this is needed so encap can built data
 1110                  * frame with correct address.
 1111                  */
 1112                 rt_dest->rt_flags = IEEE80211_MESHRT_FLAGS_PROXY |
 1113                         IEEE80211_MESHRT_FLAGS_VALID;
 1114                 rt_dest->rt_ext_seq = 1; /* random value */
 1115                 IEEE80211_ADDR_COPY(rt_dest->rt_mesh_gate, rt_gate->rt_dest);
 1116                 IEEE80211_ADDR_COPY(rt_dest->rt_nexthop, rt_gate->rt_nexthop);
 1117                 rt_dest->rt_metric = rt_gate->rt_metric;
 1118                 rt_dest->rt_nhops = rt_gate->rt_nhops;
 1119                 ieee80211_mesh_rt_update(rt_dest, ms->ms_ppath->mpp_inact);
 1120                 MESH_RT_UNLOCK(ms);
 1121                 /* XXX: lock?? */
 1122                 mcopy = m_dup(m, IEEE80211_M_NOWAIT);
 1123                 for (; mcopy != NULL; mcopy = next) {
 1124                         next = mcopy->m_nextpkt;
 1125                         mcopy->m_nextpkt = NULL;
 1126                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP,
 1127                             rt_dest->rt_dest,
 1128                             "flush queued frame %p len %d", mcopy,
 1129                             mcopy->m_pkthdr.len);
 1130                         mesh_transmit_to_gate(vap, mcopy, rt_gate);
 1131                 }
 1132                 MESH_RT_LOCK(ms);
 1133         }
 1134         rt_dest->rt_flags = 0; /* Mark invalid */
 1135         m_freem(m);
 1136         MESH_RT_UNLOCK(ms);
 1137 }
 1138 
 1139 /*
 1140  * Forward the specified frame.
 1141  * Decrement the TTL and set TA to our MAC address.
 1142  */
 1143 static void
 1144 mesh_forward(struct ieee80211vap *vap, struct mbuf *m,
 1145     const struct ieee80211_meshcntl *mc)
 1146 {
 1147         struct ieee80211com *ic = vap->iv_ic;
 1148         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 1149         struct ifnet *ifp = vap->iv_ifp;
 1150         const struct ieee80211_frame *wh =
 1151             mtod(m, const struct ieee80211_frame *);
 1152         struct mbuf *mcopy;
 1153         struct ieee80211_meshcntl *mccopy;
 1154         struct ieee80211_frame *whcopy;
 1155         struct ieee80211_node *ni;
 1156         int err;
 1157 
 1158         /* This is called from the RX path - don't hold this lock */
 1159         IEEE80211_TX_UNLOCK_ASSERT(ic);
 1160 
 1161         /*
 1162          * mesh ttl of 1 means we are the last one receiving it,
 1163          * according to amendment we decrement and then check if
 1164          * 0, if so we dont forward.
 1165          */
 1166         if (mc->mc_ttl < 1) {
 1167                 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
 1168                     "%s", "frame not fwd'd, ttl 1");
 1169                 vap->iv_stats.is_mesh_fwd_ttl++;
 1170                 return;
 1171         }
 1172         if (!(ms->ms_flags & IEEE80211_MESHFLAGS_FWD)) {
 1173                 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
 1174                     "%s", "frame not fwd'd, fwding disabled");
 1175                 vap->iv_stats.is_mesh_fwd_disabled++;
 1176                 return;
 1177         }
 1178         mcopy = m_dup(m, IEEE80211_M_NOWAIT);
 1179         if (mcopy == NULL) {
 1180                 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
 1181                     "%s", "frame not fwd'd, cannot dup");
 1182                 vap->iv_stats.is_mesh_fwd_nobuf++;
 1183                 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
 1184                 return;
 1185         }
 1186         mcopy = m_pullup(mcopy, ieee80211_hdrspace(ic, wh) +
 1187             sizeof(struct ieee80211_meshcntl));
 1188         if (mcopy == NULL) {
 1189                 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
 1190                     "%s", "frame not fwd'd, too short");
 1191                 vap->iv_stats.is_mesh_fwd_tooshort++;
 1192                 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
 1193                 m_freem(mcopy);
 1194                 return;
 1195         }
 1196         whcopy = mtod(mcopy, struct ieee80211_frame *);
 1197         mccopy = (struct ieee80211_meshcntl *)
 1198             (mtod(mcopy, uint8_t *) + ieee80211_hdrspace(ic, wh));
 1199         /* XXX clear other bits? */
 1200         whcopy->i_fc[1] &= ~IEEE80211_FC1_RETRY;
 1201         IEEE80211_ADDR_COPY(whcopy->i_addr2, vap->iv_myaddr);
 1202         if (IEEE80211_IS_MULTICAST(wh->i_addr1)) {
 1203                 ni = ieee80211_ref_node(vap->iv_bss);
 1204                 mcopy->m_flags |= M_MCAST;
 1205         } else {
 1206                 ni = ieee80211_mesh_find_txnode(vap, whcopy->i_addr3);
 1207                 if (ni == NULL) {
 1208                         /*
 1209                          * [Optional] any of the following three actions:
 1210                          * o silently discard
 1211                          * o trigger a path discovery
 1212                          * o inform TA that meshDA is unknown.
 1213                          */
 1214                         IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
 1215                             "%s", "frame not fwd'd, no path");
 1216                         ms->ms_ppath->mpp_senderror(vap, whcopy->i_addr3, NULL,
 1217                             IEEE80211_REASON_MESH_PERR_NO_FI);
 1218                         vap->iv_stats.is_mesh_fwd_nopath++;
 1219                         m_freem(mcopy);
 1220                         return;
 1221                 }
 1222                 IEEE80211_ADDR_COPY(whcopy->i_addr1, ni->ni_macaddr);
 1223         }
 1224         KASSERT(mccopy->mc_ttl > 0, ("%s called with wrong ttl", __func__));
 1225         mccopy->mc_ttl--;
 1226 
 1227         /* XXX calculate priority so drivers can find the tx queue */
 1228         M_WME_SETAC(mcopy, WME_AC_BE);
 1229 
 1230         /* XXX do we know m_nextpkt is NULL? */
 1231         MPASS((mcopy->m_pkthdr.csum_flags & CSUM_SND_TAG) == 0);
 1232         mcopy->m_pkthdr.rcvif = (void *) ni;
 1233 
 1234         /*
 1235          * XXX this bypasses all of the VAP TX handling; it passes frames
 1236          * directly to the parent interface.
 1237          *
 1238          * Because of this, there's no TX lock being held as there's no
 1239          * encaps state being used.
 1240          *
 1241          * Doing a direct parent transmit may not be the correct thing
 1242          * to do here; we'll have to re-think this soon.
 1243          */
 1244         IEEE80211_TX_LOCK(ic);
 1245         err = ieee80211_parent_xmitpkt(ic, mcopy);
 1246         IEEE80211_TX_UNLOCK(ic);
 1247         if (!err)
 1248                 if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1);
 1249 }
 1250 
 1251 static struct mbuf *
 1252 mesh_decap(struct ieee80211vap *vap, struct mbuf *m, int hdrlen, int meshdrlen)
 1253 {
 1254 #define WHDIR(wh)       ((wh)->i_fc[1] & IEEE80211_FC1_DIR_MASK)
 1255 #define MC01(mc)        ((const struct ieee80211_meshcntl_ae01 *)mc)
 1256         uint8_t b[sizeof(struct ieee80211_qosframe_addr4) +
 1257                   sizeof(struct ieee80211_meshcntl_ae10)];
 1258         const struct ieee80211_qosframe_addr4 *wh;
 1259         const struct ieee80211_meshcntl_ae10 *mc;
 1260         struct ether_header *eh;
 1261         struct llc *llc;
 1262         int ae;
 1263 
 1264         if (m->m_len < hdrlen + sizeof(*llc) &&
 1265             (m = m_pullup(m, hdrlen + sizeof(*llc))) == NULL) {
 1266                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ANY,
 1267                     "discard data frame: %s", "m_pullup failed");
 1268                 vap->iv_stats.is_rx_tooshort++;
 1269                 return NULL;
 1270         }
 1271         memcpy(b, mtod(m, caddr_t), hdrlen);
 1272         wh = (const struct ieee80211_qosframe_addr4 *)&b[0];
 1273         mc = (const struct ieee80211_meshcntl_ae10 *)&b[hdrlen - meshdrlen];
 1274         KASSERT(WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS ||
 1275                 WHDIR(wh) == IEEE80211_FC1_DIR_DSTODS,
 1276             ("bogus dir, fc 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1]));
 1277 
 1278         llc = (struct llc *)(mtod(m, caddr_t) + hdrlen);
 1279         if (llc->llc_dsap == LLC_SNAP_LSAP && llc->llc_ssap == LLC_SNAP_LSAP &&
 1280             llc->llc_control == LLC_UI && llc->llc_snap.org_code[0] == 0 &&
 1281             llc->llc_snap.org_code[1] == 0 && llc->llc_snap.org_code[2] == 0 &&
 1282             /* NB: preserve AppleTalk frames that have a native SNAP hdr */
 1283             !(llc->llc_snap.ether_type == htons(ETHERTYPE_AARP) ||
 1284               llc->llc_snap.ether_type == htons(ETHERTYPE_IPX))) {
 1285                 m_adj(m, hdrlen + sizeof(struct llc) - sizeof(*eh));
 1286                 llc = NULL;
 1287         } else {
 1288                 m_adj(m, hdrlen - sizeof(*eh));
 1289         }
 1290         eh = mtod(m, struct ether_header *);
 1291         ae = mc->mc_flags & IEEE80211_MESH_AE_MASK;
 1292         if (WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS) {
 1293                 IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr1);
 1294                 if (ae == IEEE80211_MESH_AE_00) {
 1295                         IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr3);
 1296                 } else if (ae == IEEE80211_MESH_AE_01) {
 1297                         IEEE80211_ADDR_COPY(eh->ether_shost,
 1298                             MC01(mc)->mc_addr4);
 1299                 } else {
 1300                         IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
 1301                             (const struct ieee80211_frame *)wh, NULL,
 1302                             "bad AE %d", ae);
 1303                         vap->iv_stats.is_mesh_badae++;
 1304                         m_freem(m);
 1305                         return NULL;
 1306                 }
 1307         } else {
 1308                 if (ae == IEEE80211_MESH_AE_00) {
 1309                         IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr3);
 1310                         IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr4);
 1311                 } else if (ae == IEEE80211_MESH_AE_10) {
 1312                         IEEE80211_ADDR_COPY(eh->ether_dhost, mc->mc_addr5);
 1313                         IEEE80211_ADDR_COPY(eh->ether_shost, mc->mc_addr6);
 1314                 } else {
 1315                         IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
 1316                             (const struct ieee80211_frame *)wh, NULL,
 1317                             "bad AE %d", ae);
 1318                         vap->iv_stats.is_mesh_badae++;
 1319                         m_freem(m);
 1320                         return NULL;
 1321                 }
 1322         }
 1323 #ifndef __NO_STRICT_ALIGNMENT
 1324         if (!ALIGNED_POINTER(mtod(m, caddr_t) + sizeof(*eh), uint32_t)) {
 1325                 m = ieee80211_realign(vap, m, sizeof(*eh));
 1326                 if (m == NULL)
 1327                         return NULL;
 1328         }
 1329 #endif /* !__NO_STRICT_ALIGNMENT */
 1330         if (llc != NULL) {
 1331                 eh = mtod(m, struct ether_header *);
 1332                 eh->ether_type = htons(m->m_pkthdr.len - sizeof(*eh));
 1333         }
 1334         return m;
 1335 #undef  WDIR
 1336 #undef  MC01
 1337 }
 1338 
 1339 /*
 1340  * Return non-zero if the unicast mesh data frame should be processed
 1341  * locally.  Frames that are not proxy'd have our address, otherwise
 1342  * we need to consult the routing table to look for a proxy entry.
 1343  */
 1344 static __inline int
 1345 mesh_isucastforme(struct ieee80211vap *vap, const struct ieee80211_frame *wh,
 1346     const struct ieee80211_meshcntl *mc)
 1347 {
 1348         int ae = mc->mc_flags & 3;
 1349 
 1350         KASSERT((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) == IEEE80211_FC1_DIR_DSTODS,
 1351             ("bad dir 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1]));
 1352         KASSERT(ae == IEEE80211_MESH_AE_00 || ae == IEEE80211_MESH_AE_10,
 1353             ("bad AE %d", ae));
 1354         if (ae == IEEE80211_MESH_AE_10) {       /* ucast w/ proxy */
 1355                 const struct ieee80211_meshcntl_ae10 *mc10 =
 1356                     (const struct ieee80211_meshcntl_ae10 *) mc;
 1357                 struct ieee80211_mesh_route *rt =
 1358                     ieee80211_mesh_rt_find(vap, mc10->mc_addr5);
 1359                 /* check for proxy route to ourself */
 1360                 return (rt != NULL &&
 1361                     (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY));
 1362         } else                                  /* ucast w/o proxy */
 1363                 return IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_myaddr);
 1364 }
 1365 
 1366 /*
 1367  * Verifies transmitter, updates lifetime, precursor list and forwards data.
 1368  * > 0 means we have forwarded data and no need to process locally
 1369  * == 0 means we want to process locally (and we may have forwarded data
 1370  * < 0 means there was an error and data should be discarded
 1371  */
 1372 static int
 1373 mesh_recv_indiv_data_to_fwrd(struct ieee80211vap *vap, struct mbuf *m,
 1374     struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc)
 1375 {
 1376         struct ieee80211_qosframe_addr4 *qwh;
 1377         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 1378         struct ieee80211_mesh_route *rt_meshda, *rt_meshsa;
 1379 
 1380         /* This is called from the RX path - don't hold this lock */
 1381         IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
 1382 
 1383         qwh = (struct ieee80211_qosframe_addr4 *)wh;
 1384 
 1385         /*
 1386          * TODO:
 1387          * o verify addr2 is  a legitimate transmitter
 1388          * o lifetime of precursor of addr3 (addr2) is max(init, curr)
 1389          * o lifetime of precursor of addr4 (nexthop) is max(init, curr)
 1390          */
 1391 
 1392         /* set lifetime of addr3 (meshDA) to initial value */
 1393         rt_meshda = ieee80211_mesh_rt_find(vap, qwh->i_addr3);
 1394         if (rt_meshda == NULL) {
 1395                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, qwh->i_addr2,
 1396                     "no route to meshDA(%6D)", qwh->i_addr3, ":");
 1397                 /*
 1398                  * [Optional] any of the following three actions:
 1399                  * o silently discard                           [X]
 1400                  * o trigger a path discovery                   [ ]
 1401                  * o inform TA that meshDA is unknown.          [ ]
 1402                  */
 1403                 /* XXX: stats */
 1404                 return (-1);
 1405         }
 1406 
 1407         ieee80211_mesh_rt_update(rt_meshda, ticks_to_msecs(
 1408             ms->ms_ppath->mpp_inact));
 1409 
 1410         /* set lifetime of addr4 (meshSA) to initial value */
 1411         rt_meshsa = ieee80211_mesh_rt_find(vap, qwh->i_addr4);
 1412         KASSERT(rt_meshsa != NULL, ("no route"));
 1413         ieee80211_mesh_rt_update(rt_meshsa, ticks_to_msecs(
 1414             ms->ms_ppath->mpp_inact));
 1415 
 1416         mesh_forward(vap, m, mc);
 1417         return (1); /* dont process locally */
 1418 }
 1419 
 1420 /*
 1421  * Verifies transmitter, updates lifetime, precursor list and process data
 1422  * locally, if data is proxy with AE = 10 it could mean data should go
 1423  * on another mesh path or data should be forwarded to the DS.
 1424  *
 1425  * > 0 means we have forwarded data and no need to process locally
 1426  * == 0 means we want to process locally (and we may have forwarded data
 1427  * < 0 means there was an error and data should be discarded
 1428  */
 1429 static int
 1430 mesh_recv_indiv_data_to_me(struct ieee80211vap *vap, struct mbuf *m,
 1431     struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc)
 1432 {
 1433         struct ieee80211_qosframe_addr4 *qwh;
 1434         const struct ieee80211_meshcntl_ae10 *mc10;
 1435         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 1436         struct ieee80211_mesh_route *rt;
 1437         int ae;
 1438 
 1439         /* This is called from the RX path - don't hold this lock */
 1440         IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
 1441 
 1442         qwh = (struct ieee80211_qosframe_addr4 *)wh;
 1443         mc10 = (const struct ieee80211_meshcntl_ae10 *)mc;
 1444 
 1445         /*
 1446          * TODO:
 1447          * o verify addr2 is  a legitimate transmitter
 1448          * o lifetime of precursor entry is max(init, curr)
 1449          */
 1450 
 1451         /* set lifetime of addr4 (meshSA) to initial value */
 1452         rt = ieee80211_mesh_rt_find(vap, qwh->i_addr4);
 1453         KASSERT(rt != NULL, ("no route"));
 1454         ieee80211_mesh_rt_update(rt, ticks_to_msecs(ms->ms_ppath->mpp_inact));
 1455         rt = NULL;
 1456 
 1457         ae = mc10->mc_flags & IEEE80211_MESH_AE_MASK;
 1458         KASSERT(ae == IEEE80211_MESH_AE_00 ||
 1459             ae == IEEE80211_MESH_AE_10, ("bad AE %d", ae));
 1460         if (ae == IEEE80211_MESH_AE_10) {
 1461                 if (IEEE80211_ADDR_EQ(mc10->mc_addr5, qwh->i_addr3)) {
 1462                         return (0); /* process locally */
 1463                 }
 1464 
 1465                 rt =  ieee80211_mesh_rt_find(vap, mc10->mc_addr5);
 1466                 if (rt != NULL &&
 1467                     (rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) &&
 1468                     (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) == 0) {
 1469                         /*
 1470                          * Forward on another mesh-path, according to
 1471                          * amendment as specified in 9.32.4.1
 1472                          */
 1473                         IEEE80211_ADDR_COPY(qwh->i_addr3, mc10->mc_addr5);
 1474                         mesh_forward(vap, m,
 1475                             (const struct ieee80211_meshcntl *)mc10);
 1476                         return (1); /* dont process locally */
 1477                 }
 1478                 /*
 1479                  * All other cases: forward of MSDUs from the MBSS to DS indiv.
 1480                  * addressed according to 13.11.3.2.
 1481                  */
 1482                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, qwh->i_addr2,
 1483                     "forward frame to DS, SA(%6D) DA(%6D)",
 1484                     mc10->mc_addr6, ":", mc10->mc_addr5, ":");
 1485         }
 1486         return (0); /* process locally */
 1487 }
 1488 
 1489 /*
 1490  * Try to forward the group addressed data on to other mesh STAs, and
 1491  * also to the DS.
 1492  *
 1493  * > 0 means we have forwarded data and no need to process locally
 1494  * == 0 means we want to process locally (and we may have forwarded data
 1495  * < 0 means there was an error and data should be discarded
 1496  */
 1497 static int
 1498 mesh_recv_group_data(struct ieee80211vap *vap, struct mbuf *m,
 1499     struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc)
 1500 {
 1501 #define MC01(mc)        ((const struct ieee80211_meshcntl_ae01 *)mc)
 1502         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 1503 
 1504         /* This is called from the RX path - don't hold this lock */
 1505         IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
 1506 
 1507         mesh_forward(vap, m, mc);
 1508 
 1509         if(mc->mc_ttl > 0) {
 1510                 if (mc->mc_flags & IEEE80211_MESH_AE_01) {
 1511                         /*
 1512                          * Forward of MSDUs from the MBSS to DS group addressed
 1513                          * (according to 13.11.3.2)
 1514                          * This happens by delivering the packet, and a bridge
 1515                          * will sent it on another port member.
 1516                          */
 1517                         if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE &&
 1518                             ms->ms_flags & IEEE80211_MESHFLAGS_FWD) {
 1519                                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH,
 1520                                     MC01(mc)->mc_addr4, "%s",
 1521                                     "forward from MBSS to the DS");
 1522                         }
 1523                 }
 1524         }
 1525         return (0); /* process locally */
 1526 #undef  MC01
 1527 }
 1528 
 1529 static int
 1530 mesh_input(struct ieee80211_node *ni, struct mbuf *m,
 1531     const struct ieee80211_rx_stats *rxs, int rssi, int nf)
 1532 {
 1533 #define HAS_SEQ(type)   ((type & 0x4) == 0)
 1534 #define MC01(mc)        ((const struct ieee80211_meshcntl_ae01 *)mc)
 1535         struct ieee80211vap *vap = ni->ni_vap;
 1536         struct ieee80211com *ic = ni->ni_ic;
 1537         struct ifnet *ifp = vap->iv_ifp;
 1538         struct ieee80211_frame *wh;
 1539         const struct ieee80211_meshcntl *mc;
 1540         int hdrspace, meshdrlen, need_tap, error;
 1541         uint8_t dir, type, subtype, ae;
 1542         uint32_t seq;
 1543         const uint8_t *addr;
 1544         uint8_t qos[2];
 1545 
 1546         KASSERT(ni != NULL, ("null node"));
 1547         ni->ni_inact = ni->ni_inact_reload;
 1548 
 1549         need_tap = 1;                   /* mbuf need to be tapped. */
 1550         type = -1;                      /* undefined */
 1551 
 1552         /* This is called from the RX path - don't hold this lock */
 1553         IEEE80211_TX_UNLOCK_ASSERT(ic);
 1554 
 1555         if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) {
 1556                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
 1557                     ni->ni_macaddr, NULL,
 1558                     "too short (1): len %u", m->m_pkthdr.len);
 1559                 vap->iv_stats.is_rx_tooshort++;
 1560                 goto out;
 1561         }
 1562         /*
 1563          * Bit of a cheat here, we use a pointer for a 3-address
 1564          * frame format but don't reference fields past outside
 1565          * ieee80211_frame_min w/o first validating the data is
 1566          * present.
 1567         */
 1568         wh = mtod(m, struct ieee80211_frame *);
 1569 
 1570         if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) !=
 1571             IEEE80211_FC0_VERSION_0) {
 1572                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
 1573                     ni->ni_macaddr, NULL, "wrong version %x", wh->i_fc[0]);
 1574                 vap->iv_stats.is_rx_badversion++;
 1575                 goto err;
 1576         }
 1577         dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK;
 1578         type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK;
 1579         subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK;
 1580         if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) {
 1581                 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi);
 1582                 ni->ni_noise = nf;
 1583                 if (HAS_SEQ(type)) {
 1584                         uint8_t tid = ieee80211_gettid(wh);
 1585 
 1586                         if (IEEE80211_QOS_HAS_SEQ(wh) &&
 1587                             TID_TO_WME_AC(tid) >= WME_AC_VI)
 1588                                 ic->ic_wme.wme_hipri_traffic++;
 1589                         if (! ieee80211_check_rxseq(ni, wh, wh->i_addr1, rxs))
 1590                                 goto out;
 1591                 }
 1592         }
 1593 #ifdef IEEE80211_DEBUG
 1594         /*
 1595          * It's easier, but too expensive, to simulate different mesh
 1596          * topologies by consulting the ACL policy very early, so do this
 1597          * only under DEBUG.
 1598          *
 1599          * NB: this check is also done upon peering link initiation.
 1600          */
 1601         if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) {
 1602                 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL,
 1603                     wh, NULL, "%s", "disallowed by ACL");
 1604                 vap->iv_stats.is_rx_acl++;
 1605                 goto out;
 1606         }
 1607 #endif
 1608         switch (type) {
 1609         case IEEE80211_FC0_TYPE_DATA:
 1610                 if (ni == vap->iv_bss)
 1611                         goto out;
 1612                 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) {
 1613                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
 1614                             ni->ni_macaddr, NULL,
 1615                             "peer link not yet established (%d)",
 1616                             ni->ni_mlstate);
 1617                         vap->iv_stats.is_mesh_nolink++;
 1618                         goto out;
 1619                 }
 1620                 if (dir != IEEE80211_FC1_DIR_FROMDS &&
 1621                     dir != IEEE80211_FC1_DIR_DSTODS) {
 1622                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
 1623                             wh, "data", "incorrect dir 0x%x", dir);
 1624                         vap->iv_stats.is_rx_wrongdir++;
 1625                         goto err;
 1626                 }
 1627 
 1628                 /* All Mesh data frames are QoS subtype */
 1629                 if (!HAS_SEQ(type)) {
 1630                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
 1631                             wh, "data", "incorrect subtype 0x%x", subtype);
 1632                         vap->iv_stats.is_rx_badsubtype++;
 1633                         goto err;
 1634                 }
 1635 
 1636                 /*
 1637                  * Next up, any fragmentation.
 1638                  * XXX: we defrag before we even try to forward,
 1639                  * Mesh Control field is not present in sub-sequent
 1640                  * fragmented frames. This is in contrast to Draft 4.0.
 1641                  */
 1642                 hdrspace = ieee80211_hdrspace(ic, wh);
 1643                 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
 1644                         m = ieee80211_defrag(ni, m, hdrspace, 0);
 1645                         if (m == NULL) {
 1646                                 /* Fragment dropped or frame not complete yet */
 1647                                 goto out;
 1648                         }
 1649                 }
 1650                 wh = mtod(m, struct ieee80211_frame *); /* NB: after defrag */
 1651 
 1652                 /*
 1653                  * Now we have a complete Mesh Data frame.
 1654                  */
 1655 
 1656                 /*
 1657                  * Only fromDStoDS data frames use 4 address qos frames
 1658                  * as specified in amendment. Otherwise addr4 is located
 1659                  * in the Mesh Control field and a 3 address qos frame
 1660                  * is used.
 1661                  */
 1662                 *(uint16_t *)qos = *(uint16_t *)ieee80211_getqos(wh);
 1663 
 1664                 /*
 1665                  * NB: The mesh STA sets the Mesh Control Present
 1666                  * subfield to 1 in the Mesh Data frame containing
 1667                  * an unfragmented MSDU, an A-MSDU, or the first
 1668                  * fragment of an MSDU.
 1669                  * After defrag it should always be present.
 1670                  */
 1671                 if (!(qos[1] & IEEE80211_QOS_MC)) {
 1672                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
 1673                             ni->ni_macaddr, NULL,
 1674                             "%s", "Mesh control field not present");
 1675                         vap->iv_stats.is_rx_elem_missing++; /* XXX: kinda */
 1676                         goto err;
 1677                 }
 1678 
 1679                 /* pull up enough to get to the mesh control */
 1680                 if (m->m_len < hdrspace + sizeof(struct ieee80211_meshcntl) &&
 1681                     (m = m_pullup(m, hdrspace +
 1682                         sizeof(struct ieee80211_meshcntl))) == NULL) {
 1683                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
 1684                             ni->ni_macaddr, NULL,
 1685                             "data too short: expecting %u", hdrspace);
 1686                         vap->iv_stats.is_rx_tooshort++;
 1687                         goto out;               /* XXX */
 1688                 }
 1689                 /*
 1690                  * Now calculate the full extent of the headers. Note
 1691                  * mesh_decap will pull up anything we didn't get
 1692                  * above when it strips the 802.11 headers.
 1693                  */
 1694                 mc = (const struct ieee80211_meshcntl *)
 1695                     (mtod(m, const uint8_t *) + hdrspace);
 1696                 ae = mc->mc_flags & IEEE80211_MESH_AE_MASK;
 1697                 meshdrlen = sizeof(struct ieee80211_meshcntl) +
 1698                     ae * IEEE80211_ADDR_LEN;
 1699                 hdrspace += meshdrlen;
 1700 
 1701                 /* pull complete hdrspace = ieee80211_hdrspace + meshcontrol */
 1702                 if ((meshdrlen > sizeof(struct ieee80211_meshcntl)) &&
 1703                     (m->m_len < hdrspace) &&
 1704                     ((m = m_pullup(m, hdrspace)) == NULL)) {
 1705                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
 1706                             ni->ni_macaddr, NULL,
 1707                             "data too short: expecting %u", hdrspace);
 1708                         vap->iv_stats.is_rx_tooshort++;
 1709                         goto out;               /* XXX */
 1710                 }
 1711                 /* XXX: are we sure there is no reallocating after m_pullup? */
 1712 
 1713                 seq = le32dec(mc->mc_seq);
 1714                 if (IEEE80211_IS_MULTICAST(wh->i_addr1))
 1715                         addr = wh->i_addr3;
 1716                 else if (ae == IEEE80211_MESH_AE_01)
 1717                         addr = MC01(mc)->mc_addr4;
 1718                 else
 1719                         addr = ((struct ieee80211_qosframe_addr4 *)wh)->i_addr4;
 1720                 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, addr)) {
 1721                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
 1722                             addr, "data", "%s", "not to me");
 1723                         vap->iv_stats.is_rx_wrongbss++; /* XXX kinda */
 1724                         goto out;
 1725                 }
 1726                 if (mesh_checkpseq(vap, addr, seq) != 0) {
 1727                         vap->iv_stats.is_rx_dup++;
 1728                         goto out;
 1729                 }
 1730 
 1731                 /* This code "routes" the frame to the right control path */
 1732                 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
 1733                         if (IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr3))
 1734                                 error =
 1735                                     mesh_recv_indiv_data_to_me(vap, m, wh, mc);
 1736                         else if (IEEE80211_IS_MULTICAST(wh->i_addr3))
 1737                                 error = mesh_recv_group_data(vap, m, wh, mc);
 1738                         else
 1739                                 error = mesh_recv_indiv_data_to_fwrd(vap, m,
 1740                                     wh, mc);
 1741                 } else
 1742                         error = mesh_recv_group_data(vap, m, wh, mc);
 1743                 if (error < 0)
 1744                         goto err;
 1745                 else if (error > 0)
 1746                         goto out;
 1747 
 1748                 if (ieee80211_radiotap_active_vap(vap))
 1749                         ieee80211_radiotap_rx(vap, m);
 1750                 need_tap = 0;
 1751 
 1752                 /*
 1753                  * Finally, strip the 802.11 header.
 1754                  */
 1755                 m = mesh_decap(vap, m, hdrspace, meshdrlen);
 1756                 if (m == NULL) {
 1757                         /* XXX mask bit to check for both */
 1758                         /* don't count Null data frames as errors */
 1759                         if (subtype == IEEE80211_FC0_SUBTYPE_NODATA ||
 1760                             subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL)
 1761                                 goto out;
 1762                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
 1763                             ni->ni_macaddr, "data", "%s", "decap error");
 1764                         vap->iv_stats.is_rx_decap++;
 1765                         IEEE80211_NODE_STAT(ni, rx_decap);
 1766                         goto err;
 1767                 }
 1768                 if (qos[0] & IEEE80211_QOS_AMSDU) {
 1769                         m = ieee80211_decap_amsdu(ni, m);
 1770                         if (m == NULL)
 1771                                 return IEEE80211_FC0_TYPE_DATA;
 1772                 }
 1773                 ieee80211_deliver_data(vap, ni, m);
 1774                 return type;
 1775         case IEEE80211_FC0_TYPE_MGT:
 1776                 vap->iv_stats.is_rx_mgmt++;
 1777                 IEEE80211_NODE_STAT(ni, rx_mgmt);
 1778                 if (dir != IEEE80211_FC1_DIR_NODS) {
 1779                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
 1780                             wh, "mgt", "incorrect dir 0x%x", dir);
 1781                         vap->iv_stats.is_rx_wrongdir++;
 1782                         goto err;
 1783                 }
 1784                 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) {
 1785                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
 1786                             ni->ni_macaddr, "mgt", "too short: len %u",
 1787                             m->m_pkthdr.len);
 1788                         vap->iv_stats.is_rx_tooshort++;
 1789                         goto out;
 1790                 }
 1791 #ifdef IEEE80211_DEBUG
 1792                 if ((ieee80211_msg_debug(vap) && 
 1793                     (vap->iv_ic->ic_flags & IEEE80211_F_SCAN)) ||
 1794                     ieee80211_msg_dumppkts(vap)) {
 1795                         if_printf(ifp, "received %s from %s rssi %d\n",
 1796                             ieee80211_mgt_subtype_name(subtype),
 1797                             ether_sprintf(wh->i_addr2), rssi);
 1798                 }
 1799 #endif
 1800                 if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) {
 1801                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
 1802                             wh, NULL, "%s", "WEP set but not permitted");
 1803                         vap->iv_stats.is_rx_mgtdiscard++; /* XXX */
 1804                         goto out;
 1805                 }
 1806                 vap->iv_recv_mgmt(ni, m, subtype, rxs, rssi, nf);
 1807                 goto out;
 1808         case IEEE80211_FC0_TYPE_CTL:
 1809                 vap->iv_stats.is_rx_ctl++;
 1810                 IEEE80211_NODE_STAT(ni, rx_ctrl);
 1811                 goto out;
 1812         default:
 1813                 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
 1814                     wh, "bad", "frame type 0x%x", type);
 1815                 /* should not come here */
 1816                 break;
 1817         }
 1818 err:
 1819         if_inc_counter(ifp, IFCOUNTER_IERRORS, 1);
 1820 out:
 1821         if (m != NULL) {
 1822                 if (need_tap && ieee80211_radiotap_active_vap(vap))
 1823                         ieee80211_radiotap_rx(vap, m);
 1824                 m_freem(m);
 1825         }
 1826         return type;
 1827 #undef  HAS_SEQ
 1828 #undef  MC01
 1829 }
 1830 
 1831 static void
 1832 mesh_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, int subtype,
 1833     const struct ieee80211_rx_stats *rxs, int rssi, int nf)
 1834 {
 1835         struct ieee80211vap *vap = ni->ni_vap;
 1836         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 1837         struct ieee80211com *ic = ni->ni_ic;
 1838         struct ieee80211_channel *rxchan = ic->ic_curchan;
 1839         struct ieee80211_frame *wh;
 1840         struct ieee80211_mesh_route *rt;
 1841         uint8_t *frm, *efrm;
 1842 
 1843         wh = mtod(m0, struct ieee80211_frame *);
 1844         frm = (uint8_t *)&wh[1];
 1845         efrm = mtod(m0, uint8_t *) + m0->m_len;
 1846         switch (subtype) {
 1847         case IEEE80211_FC0_SUBTYPE_PROBE_RESP:
 1848         case IEEE80211_FC0_SUBTYPE_BEACON:
 1849         {
 1850                 struct ieee80211_scanparams scan;
 1851                 struct ieee80211_channel *c;
 1852                 /*
 1853                  * We process beacon/probe response
 1854                  * frames to discover neighbors.
 1855                  */
 1856                 if (rxs != NULL) {
 1857                         c = ieee80211_lookup_channel_rxstatus(vap, rxs);
 1858                         if (c != NULL)
 1859                                 rxchan = c;
 1860                 }
 1861                 if (ieee80211_parse_beacon(ni, m0, rxchan, &scan) != 0)
 1862                         return;
 1863                 /*
 1864                  * Count frame now that we know it's to be processed.
 1865                  */
 1866                 if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) {
 1867                         vap->iv_stats.is_rx_beacon++;   /* XXX remove */
 1868                         IEEE80211_NODE_STAT(ni, rx_beacons);
 1869                 } else
 1870                         IEEE80211_NODE_STAT(ni, rx_proberesp);
 1871                 /*
 1872                  * If scanning, just pass information to the scan module.
 1873                  */
 1874                 if (ic->ic_flags & IEEE80211_F_SCAN) {
 1875                         if (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN) {
 1876                                 /*
 1877                                  * Actively scanning a channel marked passive;
 1878                                  * send a probe request now that we know there
 1879                                  * is 802.11 traffic present.
 1880                                  *
 1881                                  * XXX check if the beacon we recv'd gives
 1882                                  * us what we need and suppress the probe req
 1883                                  */
 1884                                 ieee80211_probe_curchan(vap, 1);
 1885                                 ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN;
 1886                         }
 1887                         ieee80211_add_scan(vap, rxchan, &scan, wh,
 1888                             subtype, rssi, nf);
 1889                         return;
 1890                 }
 1891 
 1892                 /* The rest of this code assumes we are running */
 1893                 if (vap->iv_state != IEEE80211_S_RUN)
 1894                         return;
 1895                 /*
 1896                  * Ignore non-mesh STAs.
 1897                  */
 1898                 if ((scan.capinfo &
 1899                      (IEEE80211_CAPINFO_ESS|IEEE80211_CAPINFO_IBSS)) ||
 1900                     scan.meshid == NULL || scan.meshconf == NULL) {
 1901                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
 1902                             wh, "beacon", "%s", "not a mesh sta");
 1903                         vap->iv_stats.is_mesh_wrongmesh++;
 1904                         return;
 1905                 }
 1906                 /*
 1907                  * Ignore STAs for other mesh networks.
 1908                  */
 1909                 if (memcmp(scan.meshid+2, ms->ms_id, ms->ms_idlen) != 0 ||
 1910                     mesh_verify_meshconf(vap, scan.meshconf)) {
 1911                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
 1912                             wh, "beacon", "%s", "not for our mesh");
 1913                         vap->iv_stats.is_mesh_wrongmesh++;
 1914                         return;
 1915                 }
 1916                 /*
 1917                  * Peer only based on the current ACL policy.
 1918                  */
 1919                 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) {
 1920                         IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL,
 1921                             wh, NULL, "%s", "disallowed by ACL");
 1922                         vap->iv_stats.is_rx_acl++;
 1923                         return;
 1924                 }
 1925                 /*
 1926                  * Do neighbor discovery.
 1927                  */
 1928                 if (!IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_macaddr)) {
 1929                         /*
 1930                          * Create a new entry in the neighbor table.
 1931                          */
 1932                         ni = ieee80211_add_neighbor(vap, wh, &scan);
 1933                 }
 1934                 /*
 1935                  * Automatically peer with discovered nodes if possible.
 1936                  */
 1937                 if (ni != vap->iv_bss &&
 1938                     (ms->ms_flags & IEEE80211_MESHFLAGS_AP)) {
 1939                         switch (ni->ni_mlstate) {
 1940                         case IEEE80211_NODE_MESH_IDLE:
 1941                         {
 1942                                 uint16_t args[1];
 1943 
 1944                                 /* Wait for backoff callout to reset counter */
 1945                                 if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding)
 1946                                         return;
 1947 
 1948                                 ni->ni_mlpid = mesh_generateid(vap);
 1949                                 if (ni->ni_mlpid == 0)
 1950                                         return;
 1951                                 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENSNT);
 1952                                 args[0] = ni->ni_mlpid;
 1953                                 ieee80211_send_action(ni,
 1954                                 IEEE80211_ACTION_CAT_SELF_PROT,
 1955                                 IEEE80211_ACTION_MESHPEERING_OPEN, args);
 1956                                 ni->ni_mlrcnt = 0;
 1957                                 mesh_peer_timeout_setup(ni);
 1958                                 break;
 1959                         }
 1960                         case IEEE80211_NODE_MESH_ESTABLISHED:
 1961                         {
 1962                                 /*
 1963                                  * Valid beacon from a peer mesh STA
 1964                                  * bump TA lifetime
 1965                                  */
 1966                                 rt = ieee80211_mesh_rt_find(vap, wh->i_addr2);
 1967                                 if(rt != NULL) {
 1968                                         ieee80211_mesh_rt_update(rt,
 1969                                             ticks_to_msecs(
 1970                                             ms->ms_ppath->mpp_inact));
 1971                                 }
 1972                                 break;
 1973                         }
 1974                         default:
 1975                                 break; /* ignore */
 1976                         }
 1977                 }
 1978                 break;
 1979         }
 1980         case IEEE80211_FC0_SUBTYPE_PROBE_REQ:
 1981         {
 1982                 uint8_t *ssid, *meshid, *rates, *xrates;
 1983 
 1984                 if (vap->iv_state != IEEE80211_S_RUN) {
 1985                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
 1986                             wh, NULL, "wrong state %s",
 1987                             ieee80211_state_name[vap->iv_state]);
 1988                         vap->iv_stats.is_rx_mgtdiscard++;
 1989                         return;
 1990                 }
 1991                 if (IEEE80211_IS_MULTICAST(wh->i_addr2)) {
 1992                         /* frame must be directed */
 1993                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
 1994                             wh, NULL, "%s", "not unicast");
 1995                         vap->iv_stats.is_rx_mgtdiscard++;       /* XXX stat */
 1996                         return;
 1997                 }
 1998                 /*
 1999                  * prreq frame format
 2000                  *      [tlv] ssid
 2001                  *      [tlv] supported rates
 2002                  *      [tlv] extended supported rates
 2003                  *      [tlv] mesh id
 2004                  */
 2005                 ssid = meshid = rates = xrates = NULL;
 2006                 while (efrm - frm > 1) {
 2007                         IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return);
 2008                         switch (*frm) {
 2009                         case IEEE80211_ELEMID_SSID:
 2010                                 ssid = frm;
 2011                                 break;
 2012                         case IEEE80211_ELEMID_RATES:
 2013                                 rates = frm;
 2014                                 break;
 2015                         case IEEE80211_ELEMID_XRATES:
 2016                                 xrates = frm;
 2017                                 break;
 2018                         case IEEE80211_ELEMID_MESHID:
 2019                                 meshid = frm;
 2020                                 break;
 2021                         }
 2022                         frm += frm[1] + 2;
 2023                 }
 2024                 IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return);
 2025                 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return);
 2026                 if (xrates != NULL)
 2027                         IEEE80211_VERIFY_ELEMENT(xrates,
 2028                             IEEE80211_RATE_MAXSIZE - rates[1], return);
 2029                 if (meshid != NULL) {
 2030                         IEEE80211_VERIFY_ELEMENT(meshid,
 2031                             IEEE80211_MESHID_LEN, return);
 2032                         /* NB: meshid, not ssid */
 2033                         IEEE80211_VERIFY_SSID(vap->iv_bss, meshid, return);
 2034                 }
 2035 
 2036                 /* XXX find a better class or define it's own */
 2037                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_INPUT, wh->i_addr2,
 2038                     "%s", "recv probe req");
 2039                 /*
 2040                  * Some legacy 11b clients cannot hack a complete
 2041                  * probe response frame.  When the request includes
 2042                  * only a bare-bones rate set, communicate this to
 2043                  * the transmit side.
 2044                  */
 2045                 ieee80211_send_proberesp(vap, wh->i_addr2, 0);
 2046                 break;
 2047         }
 2048 
 2049         case IEEE80211_FC0_SUBTYPE_ACTION:
 2050         case IEEE80211_FC0_SUBTYPE_ACTION_NOACK:
 2051                 if (ni == vap->iv_bss) {
 2052                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
 2053                             wh, NULL, "%s", "unknown node");
 2054                         vap->iv_stats.is_rx_mgtdiscard++;
 2055                 } else if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) &&
 2056                     !IEEE80211_IS_MULTICAST(wh->i_addr1)) {
 2057                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
 2058                             wh, NULL, "%s", "not for us");
 2059                         vap->iv_stats.is_rx_mgtdiscard++;
 2060                 } else if (vap->iv_state != IEEE80211_S_RUN) {
 2061                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
 2062                             wh, NULL, "wrong state %s",
 2063                             ieee80211_state_name[vap->iv_state]);
 2064                         vap->iv_stats.is_rx_mgtdiscard++;
 2065                 } else {
 2066                         if (ieee80211_parse_action(ni, m0) == 0)
 2067                                 (void)ic->ic_recv_action(ni, wh, frm, efrm);
 2068                 }
 2069                 break;
 2070 
 2071         case IEEE80211_FC0_SUBTYPE_ASSOC_REQ:
 2072         case IEEE80211_FC0_SUBTYPE_ASSOC_RESP:
 2073         case IEEE80211_FC0_SUBTYPE_REASSOC_REQ:
 2074         case IEEE80211_FC0_SUBTYPE_REASSOC_RESP:
 2075         case IEEE80211_FC0_SUBTYPE_TIMING_ADV:
 2076         case IEEE80211_FC0_SUBTYPE_ATIM:
 2077         case IEEE80211_FC0_SUBTYPE_DISASSOC:
 2078         case IEEE80211_FC0_SUBTYPE_AUTH:
 2079         case IEEE80211_FC0_SUBTYPE_DEAUTH:
 2080                 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
 2081                     wh, NULL, "%s", "not handled");
 2082                 vap->iv_stats.is_rx_mgtdiscard++;
 2083                 break;
 2084 
 2085         default:
 2086                 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
 2087                     wh, "mgt", "subtype 0x%x not handled", subtype);
 2088                 vap->iv_stats.is_rx_badsubtype++;
 2089                 break;
 2090         }
 2091 }
 2092 
 2093 static void
 2094 mesh_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype)
 2095 {
 2096 
 2097         switch (subtype) {
 2098         case IEEE80211_FC0_SUBTYPE_BAR:
 2099                 ieee80211_recv_bar(ni, m);
 2100                 break;
 2101         }
 2102 }
 2103 
 2104 /*
 2105  * Parse meshpeering action ie's for MPM frames
 2106  */
 2107 static const struct ieee80211_meshpeer_ie *
 2108 mesh_parse_meshpeering_action(struct ieee80211_node *ni,
 2109         const struct ieee80211_frame *wh,       /* XXX for VERIFY_LENGTH */
 2110         const uint8_t *frm, const uint8_t *efrm,
 2111         struct ieee80211_meshpeer_ie *mp, uint8_t subtype)
 2112 {
 2113         struct ieee80211vap *vap = ni->ni_vap;
 2114         const struct ieee80211_meshpeer_ie *mpie;
 2115         uint16_t args[3];
 2116         const uint8_t *meshid, *meshconf;
 2117         uint8_t sendclose = 0; /* 1 = MPM frame rejected, close will be sent */
 2118 
 2119         meshid = meshconf = NULL;
 2120         while (efrm - frm > 1) {
 2121                 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return NULL);
 2122                 switch (*frm) {
 2123                 case IEEE80211_ELEMID_MESHID:
 2124                         meshid = frm;
 2125                         break;
 2126                 case IEEE80211_ELEMID_MESHCONF:
 2127                         meshconf = frm;
 2128                         break;
 2129                 case IEEE80211_ELEMID_MESHPEER:
 2130                         mpie = (const struct ieee80211_meshpeer_ie *) frm;
 2131                         memset(mp, 0, sizeof(*mp));
 2132                         mp->peer_len = mpie->peer_len;
 2133                         mp->peer_proto = le16dec(&mpie->peer_proto);
 2134                         mp->peer_llinkid = le16dec(&mpie->peer_llinkid);
 2135                         switch (subtype) {
 2136                         case IEEE80211_ACTION_MESHPEERING_CONFIRM:
 2137                                 mp->peer_linkid =
 2138                                     le16dec(&mpie->peer_linkid);
 2139                                 break;
 2140                         case IEEE80211_ACTION_MESHPEERING_CLOSE:
 2141                                 /* NB: peer link ID is optional */
 2142                                 if (mpie->peer_len ==
 2143                                     (IEEE80211_MPM_BASE_SZ + 2)) {
 2144                                         mp->peer_linkid = 0;
 2145                                         mp->peer_rcode =
 2146                                             le16dec(&mpie->peer_linkid);
 2147                                 } else {
 2148                                         mp->peer_linkid =
 2149                                             le16dec(&mpie->peer_linkid);
 2150                                         mp->peer_rcode =
 2151                                             le16dec(&mpie->peer_rcode);
 2152                                 }
 2153                                 break;
 2154                         }
 2155                         break;
 2156                 }
 2157                 frm += frm[1] + 2;
 2158         }
 2159 
 2160         /*
 2161          * Verify the contents of the frame.
 2162          * If it fails validation, close the peer link.
 2163          */
 2164         if (mesh_verify_meshpeer(vap, subtype, (const uint8_t *)mp)) {
 2165                 sendclose = 1;
 2166                 IEEE80211_DISCARD(vap,
 2167                     IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
 2168                     wh, NULL, "%s", "MPM validation failed");
 2169         }
 2170 
 2171         /* If meshid is not the same reject any frames type. */
 2172         if (sendclose == 0 && mesh_verify_meshid(vap, meshid)) {
 2173                 sendclose = 1;
 2174                 IEEE80211_DISCARD(vap,
 2175                     IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
 2176                     wh, NULL, "%s", "not for our mesh");
 2177                 if (subtype == IEEE80211_ACTION_MESHPEERING_CLOSE) {
 2178                         /*
 2179                          * Standard not clear about this, if we dont ignore
 2180                          * there will be an endless loop between nodes sending
 2181                          * CLOSE frames between each other with wrong meshid.
 2182                          * Discard and timers will bring FSM to IDLE state.
 2183                          */
 2184                         return NULL;
 2185                 }
 2186         }
 2187 
 2188         /*
 2189          * Close frames are accepted if meshid is the same.
 2190          * Verify the other two types.
 2191          */
 2192         if (sendclose == 0 && subtype != IEEE80211_ACTION_MESHPEERING_CLOSE &&
 2193             mesh_verify_meshconf(vap, meshconf)) {
 2194                 sendclose = 1;
 2195                 IEEE80211_DISCARD(vap,
 2196                     IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
 2197                     wh, NULL, "%s", "configuration mismatch");
 2198         }
 2199 
 2200         if (sendclose) {
 2201                 vap->iv_stats.is_rx_mgtdiscard++;
 2202                 switch (ni->ni_mlstate) {
 2203                 case IEEE80211_NODE_MESH_IDLE:
 2204                 case IEEE80211_NODE_MESH_ESTABLISHED:
 2205                 case IEEE80211_NODE_MESH_HOLDING:
 2206                         /* ignore */
 2207                         break;
 2208                 case IEEE80211_NODE_MESH_OPENSNT:
 2209                 case IEEE80211_NODE_MESH_OPENRCV:
 2210                 case IEEE80211_NODE_MESH_CONFIRMRCV:
 2211                         args[0] = ni->ni_mlpid;
 2212                         args[1] = ni->ni_mllid;
 2213                         /* Reason codes for rejection */
 2214                         switch (subtype) {
 2215                         case IEEE80211_ACTION_MESHPEERING_OPEN:
 2216                                 args[2] = IEEE80211_REASON_MESH_CPVIOLATION;
 2217                                 break;
 2218                         case IEEE80211_ACTION_MESHPEERING_CONFIRM:
 2219                                 args[2] = IEEE80211_REASON_MESH_INCONS_PARAMS;
 2220                                 break;
 2221                         }
 2222                         ieee80211_send_action(ni,
 2223                             IEEE80211_ACTION_CAT_SELF_PROT,
 2224                             IEEE80211_ACTION_MESHPEERING_CLOSE,
 2225                             args);
 2226                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
 2227                         mesh_peer_timeout_setup(ni);
 2228                         break;
 2229                 }
 2230                 return NULL;
 2231         }
 2232 
 2233         return (const struct ieee80211_meshpeer_ie *) mp;
 2234 }
 2235 
 2236 static int
 2237 mesh_recv_action_meshpeering_open(struct ieee80211_node *ni,
 2238         const struct ieee80211_frame *wh,
 2239         const uint8_t *frm, const uint8_t *efrm)
 2240 {
 2241         struct ieee80211vap *vap = ni->ni_vap;
 2242         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 2243         struct ieee80211_meshpeer_ie ie;
 2244         const struct ieee80211_meshpeer_ie *meshpeer;
 2245         uint16_t args[3];
 2246 
 2247         /* +2+2 for action + code + capabilites */
 2248         meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2, efrm, &ie,
 2249             IEEE80211_ACTION_MESHPEERING_OPEN);
 2250         if (meshpeer == NULL) {
 2251                 return 0;
 2252         }
 2253 
 2254         /* XXX move up */
 2255         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
 2256             "recv PEER OPEN, lid 0x%x", meshpeer->peer_llinkid);
 2257 
 2258         switch (ni->ni_mlstate) {
 2259         case IEEE80211_NODE_MESH_IDLE:
 2260                 /* Reject open request if reached our maximum neighbor count */
 2261                 if (ms->ms_neighbors >= IEEE80211_MESH_MAX_NEIGHBORS) {
 2262                         args[0] = meshpeer->peer_llinkid;
 2263                         args[1] = 0;
 2264                         args[2] = IEEE80211_REASON_MESH_MAX_PEERS;
 2265                         ieee80211_send_action(ni,
 2266                             IEEE80211_ACTION_CAT_SELF_PROT,
 2267                             IEEE80211_ACTION_MESHPEERING_CLOSE,
 2268                             args);
 2269                         /* stay in IDLE state */
 2270                         return (0);
 2271                 }
 2272                 /* Open frame accepted */
 2273                 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV);
 2274                 ni->ni_mllid = meshpeer->peer_llinkid;
 2275                 ni->ni_mlpid = mesh_generateid(vap);
 2276                 if (ni->ni_mlpid == 0)
 2277                         return 0;               /* XXX */
 2278                 args[0] = ni->ni_mlpid;
 2279                 /* Announce we're open too... */
 2280                 ieee80211_send_action(ni,
 2281                     IEEE80211_ACTION_CAT_SELF_PROT,
 2282                     IEEE80211_ACTION_MESHPEERING_OPEN, args);
 2283                 /* ...and confirm the link. */
 2284                 args[0] = ni->ni_mlpid;
 2285                 args[1] = ni->ni_mllid;
 2286                 ieee80211_send_action(ni,
 2287                     IEEE80211_ACTION_CAT_SELF_PROT,
 2288                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
 2289                     args);
 2290                 mesh_peer_timeout_setup(ni);
 2291                 break;
 2292         case IEEE80211_NODE_MESH_OPENRCV:
 2293                 /* Wrong Link ID */
 2294                 if (ni->ni_mllid != meshpeer->peer_llinkid) {
 2295                         args[0] = ni->ni_mllid;
 2296                         args[1] = ni->ni_mlpid;
 2297                         args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
 2298                         ieee80211_send_action(ni,
 2299                             IEEE80211_ACTION_CAT_SELF_PROT,
 2300                             IEEE80211_ACTION_MESHPEERING_CLOSE,
 2301                             args);
 2302                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
 2303                         mesh_peer_timeout_setup(ni);
 2304                         break;
 2305                 }
 2306                 /* Duplicate open, confirm again. */
 2307                 args[0] = ni->ni_mlpid;
 2308                 args[1] = ni->ni_mllid;
 2309                 ieee80211_send_action(ni,
 2310                     IEEE80211_ACTION_CAT_SELF_PROT,
 2311                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
 2312                     args);
 2313                 break;
 2314         case IEEE80211_NODE_MESH_OPENSNT:
 2315                 ni->ni_mllid = meshpeer->peer_llinkid;
 2316                 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV);
 2317                 args[0] = ni->ni_mlpid;
 2318                 args[1] = ni->ni_mllid;
 2319                 ieee80211_send_action(ni,
 2320                     IEEE80211_ACTION_CAT_SELF_PROT,
 2321                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
 2322                     args);
 2323                 /* NB: don't setup/clear any timeout */
 2324                 break;
 2325         case IEEE80211_NODE_MESH_CONFIRMRCV:
 2326                 if (ni->ni_mlpid != meshpeer->peer_linkid ||
 2327                     ni->ni_mllid != meshpeer->peer_llinkid) {
 2328                         args[0] = ni->ni_mlpid;
 2329                         args[1] = ni->ni_mllid;
 2330                         args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
 2331                         ieee80211_send_action(ni,
 2332                             IEEE80211_ACTION_CAT_SELF_PROT,
 2333                             IEEE80211_ACTION_MESHPEERING_CLOSE,
 2334                             args);
 2335                         mesh_linkchange(ni,
 2336                             IEEE80211_NODE_MESH_HOLDING);
 2337                         mesh_peer_timeout_setup(ni);
 2338                         break;
 2339                 }
 2340                 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED);
 2341                 ni->ni_mllid = meshpeer->peer_llinkid;
 2342                 args[0] = ni->ni_mlpid;
 2343                 args[1] = ni->ni_mllid;
 2344                 ieee80211_send_action(ni,
 2345                     IEEE80211_ACTION_CAT_SELF_PROT,
 2346                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
 2347                     args);
 2348                 mesh_peer_timeout_stop(ni);
 2349                 break;
 2350         case IEEE80211_NODE_MESH_ESTABLISHED:
 2351                 if (ni->ni_mllid != meshpeer->peer_llinkid) {
 2352                         args[0] = ni->ni_mllid;
 2353                         args[1] = ni->ni_mlpid;
 2354                         args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
 2355                         ieee80211_send_action(ni,
 2356                             IEEE80211_ACTION_CAT_SELF_PROT,
 2357                             IEEE80211_ACTION_MESHPEERING_CLOSE,
 2358                             args);
 2359                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
 2360                         mesh_peer_timeout_setup(ni);
 2361                         break;
 2362                 }
 2363                 args[0] = ni->ni_mlpid;
 2364                 args[1] = ni->ni_mllid;
 2365                 ieee80211_send_action(ni,
 2366                     IEEE80211_ACTION_CAT_SELF_PROT,
 2367                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
 2368                     args);
 2369                 break;
 2370         case IEEE80211_NODE_MESH_HOLDING:
 2371                 args[0] = ni->ni_mlpid;
 2372                 args[1] = meshpeer->peer_llinkid;
 2373                 /* Standard not clear about what the reaason code should be */
 2374                 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
 2375                 ieee80211_send_action(ni,
 2376                     IEEE80211_ACTION_CAT_SELF_PROT,
 2377                     IEEE80211_ACTION_MESHPEERING_CLOSE,
 2378                     args);
 2379                 break;
 2380         }
 2381         return 0;
 2382 }
 2383 
 2384 static int
 2385 mesh_recv_action_meshpeering_confirm(struct ieee80211_node *ni,
 2386         const struct ieee80211_frame *wh,
 2387         const uint8_t *frm, const uint8_t *efrm)
 2388 {
 2389         struct ieee80211vap *vap = ni->ni_vap;
 2390         struct ieee80211_meshpeer_ie ie;
 2391         const struct ieee80211_meshpeer_ie *meshpeer;
 2392         uint16_t args[3];
 2393 
 2394         /* +2+2+2+2 for action + code + capabilites + status code + AID */
 2395         meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2+2+2, efrm, &ie,
 2396             IEEE80211_ACTION_MESHPEERING_CONFIRM);
 2397         if (meshpeer == NULL) {
 2398                 return 0;
 2399         }
 2400 
 2401         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
 2402             "recv PEER CONFIRM, local id 0x%x, peer id 0x%x",
 2403             meshpeer->peer_llinkid, meshpeer->peer_linkid);
 2404 
 2405         switch (ni->ni_mlstate) {
 2406         case IEEE80211_NODE_MESH_OPENRCV:
 2407                 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED);
 2408                 mesh_peer_timeout_stop(ni);
 2409                 break;
 2410         case IEEE80211_NODE_MESH_OPENSNT:
 2411                 mesh_linkchange(ni, IEEE80211_NODE_MESH_CONFIRMRCV);
 2412                 mesh_peer_timeout_setup(ni);
 2413                 break;
 2414         case IEEE80211_NODE_MESH_HOLDING:
 2415                 args[0] = ni->ni_mlpid;
 2416                 args[1] = meshpeer->peer_llinkid;
 2417                 /* Standard not clear about what the reaason code should be */
 2418                 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
 2419                 ieee80211_send_action(ni,
 2420                     IEEE80211_ACTION_CAT_SELF_PROT,
 2421                     IEEE80211_ACTION_MESHPEERING_CLOSE,
 2422                     args);
 2423                 break;
 2424         case IEEE80211_NODE_MESH_CONFIRMRCV:
 2425                 if (ni->ni_mllid != meshpeer->peer_llinkid) {
 2426                         args[0] = ni->ni_mlpid;
 2427                         args[1] = ni->ni_mllid;
 2428                         args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
 2429                         ieee80211_send_action(ni,
 2430                             IEEE80211_ACTION_CAT_SELF_PROT,
 2431                             IEEE80211_ACTION_MESHPEERING_CLOSE,
 2432                             args);
 2433                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
 2434                         mesh_peer_timeout_setup(ni);
 2435                 }
 2436                 break;
 2437         default:
 2438                 IEEE80211_DISCARD(vap,
 2439                     IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
 2440                     wh, NULL, "received confirm in invalid state %d",
 2441                     ni->ni_mlstate);
 2442                 vap->iv_stats.is_rx_mgtdiscard++;
 2443                 break;
 2444         }
 2445         return 0;
 2446 }
 2447 
 2448 static int
 2449 mesh_recv_action_meshpeering_close(struct ieee80211_node *ni,
 2450         const struct ieee80211_frame *wh,
 2451         const uint8_t *frm, const uint8_t *efrm)
 2452 {
 2453         struct ieee80211_meshpeer_ie ie;
 2454         const struct ieee80211_meshpeer_ie *meshpeer;
 2455         uint16_t args[3];
 2456 
 2457         /* +2 for action + code */
 2458         meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2, efrm, &ie,
 2459             IEEE80211_ACTION_MESHPEERING_CLOSE);
 2460         if (meshpeer == NULL) {
 2461                 return 0;
 2462         }
 2463 
 2464         /*
 2465          * XXX: check reason code, for example we could receive
 2466          * IEEE80211_REASON_MESH_MAX_PEERS then we should not attempt
 2467          * to peer again.
 2468          */
 2469 
 2470         IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
 2471             ni, "%s", "recv PEER CLOSE");
 2472 
 2473         switch (ni->ni_mlstate) {
 2474         case IEEE80211_NODE_MESH_IDLE:
 2475                 /* ignore */
 2476                 break;
 2477         case IEEE80211_NODE_MESH_OPENRCV:
 2478         case IEEE80211_NODE_MESH_OPENSNT:
 2479         case IEEE80211_NODE_MESH_CONFIRMRCV:
 2480         case IEEE80211_NODE_MESH_ESTABLISHED:
 2481                 args[0] = ni->ni_mlpid;
 2482                 args[1] = ni->ni_mllid;
 2483                 args[2] = IEEE80211_REASON_MESH_CLOSE_RCVD;
 2484                 ieee80211_send_action(ni,
 2485                     IEEE80211_ACTION_CAT_SELF_PROT,
 2486                     IEEE80211_ACTION_MESHPEERING_CLOSE,
 2487                     args);
 2488                 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
 2489                 mesh_peer_timeout_setup(ni);
 2490                 break;
 2491         case IEEE80211_NODE_MESH_HOLDING:
 2492                 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE);
 2493                 mesh_peer_timeout_stop(ni);
 2494                 break;
 2495         }
 2496         return 0;
 2497 }
 2498 
 2499 /*
 2500  * Link Metric handling.
 2501  */
 2502 static int
 2503 mesh_recv_action_meshlmetric(struct ieee80211_node *ni,
 2504         const struct ieee80211_frame *wh,
 2505         const uint8_t *frm, const uint8_t *efrm)
 2506 {
 2507         const struct ieee80211_meshlmetric_ie *ie =
 2508             (const struct ieee80211_meshlmetric_ie *)
 2509             (frm+2); /* action + code */
 2510         struct ieee80211_meshlmetric_ie lm_rep;
 2511 
 2512         if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) {
 2513                 lm_rep.lm_flags = 0;
 2514                 lm_rep.lm_metric = mesh_airtime_calc(ni);
 2515                 ieee80211_send_action(ni,
 2516                     IEEE80211_ACTION_CAT_MESH,
 2517                     IEEE80211_ACTION_MESH_LMETRIC,
 2518                     &lm_rep);
 2519         }
 2520         /* XXX: else do nothing for now */
 2521         return 0;
 2522 }
 2523 
 2524 /*
 2525  * Parse meshgate action ie's for GANN frames.
 2526  * Returns -1 if parsing fails, otherwise 0.
 2527  */
 2528 static int
 2529 mesh_parse_meshgate_action(struct ieee80211_node *ni,
 2530     const struct ieee80211_frame *wh,   /* XXX for VERIFY_LENGTH */
 2531     struct ieee80211_meshgann_ie *ie, const uint8_t *frm, const uint8_t *efrm)
 2532 {
 2533         struct ieee80211vap *vap = ni->ni_vap;
 2534         const struct ieee80211_meshgann_ie *gannie;
 2535 
 2536         while (efrm - frm > 1) {
 2537                 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return -1);
 2538                 switch (*frm) {
 2539                 case IEEE80211_ELEMID_MESHGANN:
 2540                         gannie = (const struct ieee80211_meshgann_ie *) frm;
 2541                         memset(ie, 0, sizeof(*ie));
 2542                         ie->gann_ie = gannie->gann_ie;
 2543                         ie->gann_len = gannie->gann_len;
 2544                         ie->gann_flags = gannie->gann_flags;
 2545                         ie->gann_hopcount = gannie->gann_hopcount;
 2546                         ie->gann_ttl = gannie->gann_ttl;
 2547                         IEEE80211_ADDR_COPY(ie->gann_addr, gannie->gann_addr);
 2548                         ie->gann_seq = le32dec(&gannie->gann_seq);
 2549                         ie->gann_interval = le16dec(&gannie->gann_interval);
 2550                         break;
 2551                 }
 2552                 frm += frm[1] + 2;
 2553         }
 2554 
 2555         return 0;
 2556 }
 2557 
 2558 /*
 2559  * Mesh Gate Announcement handling.
 2560  */
 2561 static int
 2562 mesh_recv_action_meshgate(struct ieee80211_node *ni,
 2563         const struct ieee80211_frame *wh,
 2564         const uint8_t *frm, const uint8_t *efrm)
 2565 {
 2566         struct ieee80211vap *vap = ni->ni_vap;
 2567         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 2568         struct ieee80211_mesh_gate_route *gr, *next;
 2569         struct ieee80211_mesh_route *rt_gate;
 2570         struct ieee80211_meshgann_ie pgann;
 2571         struct ieee80211_meshgann_ie ie;
 2572         int found = 0;
 2573 
 2574         /* +2 for action + code */
 2575         if (mesh_parse_meshgate_action(ni, wh, &ie, frm+2, efrm) != 0) {
 2576                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
 2577                     ni->ni_macaddr, NULL, "%s",
 2578                     "GANN parsing failed");
 2579                 vap->iv_stats.is_rx_mgtdiscard++;
 2580                 return (0);
 2581         }
 2582 
 2583         if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ie.gann_addr))
 2584                 return 0;
 2585 
 2586         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ni->ni_macaddr,
 2587             "received GANN, meshgate: %6D (seq %u)", ie.gann_addr, ":",
 2588             ie.gann_seq);
 2589 
 2590         if (ms == NULL)
 2591                 return (0);
 2592         MESH_RT_LOCK(ms);
 2593         TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) {
 2594                 if (!IEEE80211_ADDR_EQ(gr->gr_addr, ie.gann_addr))
 2595                         continue;
 2596                 if (ie.gann_seq <= gr->gr_lastseq) {
 2597                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
 2598                             ni->ni_macaddr, NULL,
 2599                             "GANN old seqno %u <= %u",
 2600                             ie.gann_seq, gr->gr_lastseq);
 2601                         MESH_RT_UNLOCK(ms);
 2602                         return (0);
 2603                 }
 2604                 /* corresponding mesh gate found & GANN accepted */
 2605                 found = 1;
 2606                 break;
 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), IEEE80211_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 announcement
 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                         error = copyin(ireq->i_data, tmpaddr,
 3576                             IEEE80211_ADDR_LEN);
 3577                         if (error != 0)
 3578                                 break;
 3579                         if (IEEE80211_ADDR_EQ(vap->iv_myaddr, tmpaddr) ||
 3580                             IEEE80211_ADDR_EQ(broadcastaddr, tmpaddr))
 3581                                 return EINVAL;
 3582                         ieee80211_mesh_discover(vap, tmpaddr, NULL);
 3583                         break;
 3584                 case IEEE80211_MESH_RTCMD_DELETE:
 3585                         error = copyin(ireq->i_data, tmpaddr,
 3586                             IEEE80211_ADDR_LEN);
 3587                         if (error != 0)
 3588                                 break;
 3589                         ieee80211_mesh_rt_del(vap, tmpaddr);
 3590                         break;
 3591                 default:
 3592                         return ENOSYS;
 3593                 }
 3594                 break;
 3595         case IEEE80211_IOC_MESH_PR_METRIC:
 3596                 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto));
 3597                 if (error == 0) {
 3598                         error = mesh_select_proto_metric(vap, tmpproto);
 3599                         if (error == 0)
 3600                                 error = ENETRESET;
 3601                 }
 3602                 break;
 3603         case IEEE80211_IOC_MESH_PR_PATH:
 3604                 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto));
 3605                 if (error == 0) {
 3606                         error = mesh_select_proto_path(vap, tmpproto);
 3607                         if (error == 0)
 3608                                 error = ENETRESET;
 3609                 }
 3610                 break;
 3611         default:
 3612                 return ENOSYS;
 3613         }
 3614         return error;
 3615 }
 3616 IEEE80211_IOCTL_SET(mesh, mesh_ioctl_set80211);

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