The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

FreeBSD/Linux Kernel Cross Reference
sys/net80211/ieee80211_mesh.c

Version: -  FREEBSD  -  FREEBSD-12-STABLE  -  FREEBSD-12-0  -  FREEBSD-11-STABLE  -  FREEBSD-11-2  -  FREEBSD-11-1  -  FREEBSD-11-0  -  FREEBSD-10-STABLE  -  FREEBSD-10-4  -  FREEBSD-10-3  -  FREEBSD-10-2  -  FREEBSD-10-1  -  FREEBSD-10-0  -  FREEBSD-9-STABLE  -  FREEBSD-9-3  -  FREEBSD-9-2  -  FREEBSD-9-1  -  FREEBSD-9-0  -  FREEBSD-8-STABLE  -  FREEBSD-8-4  -  FREEBSD-8-3  -  FREEBSD-8-2  -  FREEBSD-8-1  -  FREEBSD-8-0  -  FREEBSD-7-STABLE  -  FREEBSD-7-4  -  FREEBSD-7-3  -  FREEBSD-7-2  -  FREEBSD-7-1  -  FREEBSD-7-0  -  FREEBSD-6-STABLE  -  FREEBSD-6-4  -  FREEBSD-6-3  -  FREEBSD-6-2  -  FREEBSD-6-1  -  FREEBSD-6-0  -  FREEBSD-5-STABLE  -  FREEBSD-5-5  -  FREEBSD-5-4  -  FREEBSD-5-3  -  FREEBSD-5-2  -  FREEBSD-5-1  -  FREEBSD-5-0  -  FREEBSD-4-STABLE  -  FREEBSD-3-STABLE  -  FREEBSD22  -  linux-2.6  -  linux-2.4.22  -  MK83  -  MK84  -  PLAN9  -  DFBSD  -  NETBSD  -  NETBSD5  -  NETBSD4  -  NETBSD3  -  NETBSD20  -  OPENBSD  -  xnu-517  -  xnu-792  -  xnu-792.6.70  -  xnu-1228  -  xnu-1456.1.26  -  xnu-1699.24.8  -  xnu-2050.18.24  -  OPENSOLARIS  -  minix-3-1-1 
SearchContext: -  none  -  3  -  10 

    1 /*- 
    2  * Copyright (c) 2009 The FreeBSD Foundation 
    3  * All rights reserved. 
    4  * 
    5  * This software was developed by Rui Paulo under sponsorship from the
    6  * FreeBSD Foundation. 
    7  *  
    8  * Redistribution and use in source and binary forms, with or without 
    9  * modification, are permitted provided that the following conditions 
   10  * are met: 
   11  * 1. Redistributions of source code must retain the above copyright 
   12  *    notice, this list of conditions and the following disclaimer. 
   13  * 2. Redistributions in binary form must reproduce the above copyright 
   14  *    notice, this list of conditions and the following disclaimer in the 
   15  *    documentation and/or other materials provided with the distribution. 
   16  * 
   17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 
   18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
   19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
   20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 
   21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 
   22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 
   23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 
   24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 
   25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 
   26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 
   27  * SUCH DAMAGE. 
   28  */ 
   29 #include <sys/cdefs.h>
   30 #ifdef __FreeBSD__
   31 __FBSDID("$FreeBSD: releng/10.0/sys/net80211/ieee80211_mesh.c 254082 2013-08-08 05:09:35Z adrian $");
   32 #endif
   33 
   34 /*
   35  * IEEE 802.11s Mesh Point (MBSS) support.
   36  *
   37  * Based on March 2009, D3.0 802.11s draft spec.
   38  */
   39 #include "opt_inet.h"
   40 #include "opt_wlan.h"
   41 
   42 #include <sys/param.h>
   43 #include <sys/systm.h> 
   44 #include <sys/mbuf.h>   
   45 #include <sys/malloc.h>
   46 #include <sys/kernel.h>
   47 
   48 #include <sys/socket.h>
   49 #include <sys/sockio.h>
   50 #include <sys/endian.h>
   51 #include <sys/errno.h>
   52 #include <sys/proc.h>
   53 #include <sys/sysctl.h>
   54 
   55 #include <net/bpf.h>
   56 #include <net/if.h>
   57 #include <net/if_media.h>
   58 #include <net/if_llc.h>
   59 #include <net/ethernet.h>
   60 
   61 #include <net80211/ieee80211_var.h>
   62 #include <net80211/ieee80211_action.h>
   63 #ifdef IEEE80211_SUPPORT_SUPERG
   64 #include <net80211/ieee80211_superg.h>
   65 #endif
   66 #include <net80211/ieee80211_input.h>
   67 #include <net80211/ieee80211_mesh.h>
   68 
   69 static void     mesh_rt_flush_invalid(struct ieee80211vap *);
   70 static int      mesh_select_proto_path(struct ieee80211vap *, const char *);
   71 static int      mesh_select_proto_metric(struct ieee80211vap *, const char *);
   72 static void     mesh_vattach(struct ieee80211vap *);
   73 static int      mesh_newstate(struct ieee80211vap *, enum ieee80211_state, int);
   74 static void     mesh_rt_cleanup_cb(void *);
   75 static void     mesh_gatemode_setup(struct ieee80211vap *);
   76 static void     mesh_gatemode_cb(void *);
   77 static void     mesh_linkchange(struct ieee80211_node *,
   78                     enum ieee80211_mesh_mlstate);
   79 static void     mesh_checkid(void *, struct ieee80211_node *);
   80 static uint32_t mesh_generateid(struct ieee80211vap *);
   81 static int      mesh_checkpseq(struct ieee80211vap *,
   82                     const uint8_t [IEEE80211_ADDR_LEN], uint32_t);
   83 static void     mesh_transmit_to_gate(struct ieee80211vap *, struct mbuf *,
   84                     struct ieee80211_mesh_route *);
   85 static void     mesh_forward(struct ieee80211vap *, struct mbuf *,
   86                     const struct ieee80211_meshcntl *);
   87 static int      mesh_input(struct ieee80211_node *, struct mbuf *, int, int);
   88 static void     mesh_recv_mgmt(struct ieee80211_node *, struct mbuf *, int,
   89                     int, int);
   90 static void     mesh_recv_ctl(struct ieee80211_node *, struct mbuf *, int);
   91 static void     mesh_peer_timeout_setup(struct ieee80211_node *);
   92 static void     mesh_peer_timeout_backoff(struct ieee80211_node *);
   93 static void     mesh_peer_timeout_cb(void *);
   94 static __inline void
   95                 mesh_peer_timeout_stop(struct ieee80211_node *);
   96 static int      mesh_verify_meshid(struct ieee80211vap *, const uint8_t *);
   97 static int      mesh_verify_meshconf(struct ieee80211vap *, const uint8_t *);
   98 static int      mesh_verify_meshpeer(struct ieee80211vap *, uint8_t,
   99                     const uint8_t *);
  100 uint32_t        mesh_airtime_calc(struct ieee80211_node *);
  101 
  102 /*
  103  * Timeout values come from the specification and are in milliseconds.
  104  */
  105 static SYSCTL_NODE(_net_wlan, OID_AUTO, mesh, CTLFLAG_RD, 0,
  106     "IEEE 802.11s parameters");
  107 static int      ieee80211_mesh_gateint = -1;
  108 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, gateint, CTLTYPE_INT | CTLFLAG_RW,
  109     &ieee80211_mesh_gateint, 0, ieee80211_sysctl_msecs_ticks, "I",
  110     "mesh gate interval (ms)");
  111 static int ieee80211_mesh_retrytimeout = -1;
  112 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, retrytimeout, CTLTYPE_INT | CTLFLAG_RW,
  113     &ieee80211_mesh_retrytimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
  114     "Retry timeout (msec)");
  115 static int ieee80211_mesh_holdingtimeout = -1;
  116 
  117 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, holdingtimeout, CTLTYPE_INT | CTLFLAG_RW,
  118     &ieee80211_mesh_holdingtimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
  119     "Holding state timeout (msec)");
  120 static int ieee80211_mesh_confirmtimeout = -1;
  121 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, confirmtimeout, CTLTYPE_INT | CTLFLAG_RW,
  122     &ieee80211_mesh_confirmtimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
  123     "Confirm state timeout (msec)");
  124 static int ieee80211_mesh_backofftimeout = -1;
  125 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, backofftimeout, CTLTYPE_INT | CTLFLAG_RW,
  126     &ieee80211_mesh_backofftimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
  127     "Backoff timeout (msec). This is to throutles peering forever when "
  128     "not receving answer or is rejected by a neighbor");
  129 static int ieee80211_mesh_maxretries = 2;
  130 SYSCTL_INT(_net_wlan_mesh, OID_AUTO, maxretries, CTLTYPE_INT | CTLFLAG_RW,
  131     &ieee80211_mesh_maxretries, 0,
  132     "Maximum retries during peer link establishment");
  133 static int ieee80211_mesh_maxholding = 2;
  134 SYSCTL_INT(_net_wlan_mesh, OID_AUTO, maxholding, CTLTYPE_INT | CTLFLAG_RW,
  135     &ieee80211_mesh_maxholding, 0,
  136     "Maximum times we are allowed to transition to HOLDING state before "
  137     "backinoff during peer link establishment");
  138 
  139 static const uint8_t broadcastaddr[IEEE80211_ADDR_LEN] =
  140         { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
  141 
  142 static  ieee80211_recv_action_func mesh_recv_action_meshpeering_open;
  143 static  ieee80211_recv_action_func mesh_recv_action_meshpeering_confirm;
  144 static  ieee80211_recv_action_func mesh_recv_action_meshpeering_close;
  145 static  ieee80211_recv_action_func mesh_recv_action_meshlmetric;
  146 static  ieee80211_recv_action_func mesh_recv_action_meshgate;
  147 
  148 static  ieee80211_send_action_func mesh_send_action_meshpeering_open;
  149 static  ieee80211_send_action_func mesh_send_action_meshpeering_confirm;
  150 static  ieee80211_send_action_func mesh_send_action_meshpeering_close;
  151 static  ieee80211_send_action_func mesh_send_action_meshlmetric;
  152 static  ieee80211_send_action_func mesh_send_action_meshgate;
  153 
  154 static const struct ieee80211_mesh_proto_metric mesh_metric_airtime = {
  155         .mpm_descr      = "AIRTIME",
  156         .mpm_ie         = IEEE80211_MESHCONF_METRIC_AIRTIME,
  157         .mpm_metric     = mesh_airtime_calc,
  158 };
  159 
  160 static struct ieee80211_mesh_proto_path         mesh_proto_paths[4];
  161 static struct ieee80211_mesh_proto_metric       mesh_proto_metrics[4];
  162 
  163 #define RT_ENTRY_LOCK(rt)       mtx_lock(&(rt)->rt_lock)
  164 #define RT_ENTRY_LOCK_ASSERT(rt) mtx_assert(&(rt)->rt_lock, MA_OWNED)
  165 #define RT_ENTRY_UNLOCK(rt)     mtx_unlock(&(rt)->rt_lock)
  166 
  167 #define MESH_RT_LOCK(ms)        mtx_lock(&(ms)->ms_rt_lock)
  168 #define MESH_RT_LOCK_ASSERT(ms) mtx_assert(&(ms)->ms_rt_lock, MA_OWNED)
  169 #define MESH_RT_UNLOCK(ms)      mtx_unlock(&(ms)->ms_rt_lock)
  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 = malloc(ALIGN(sizeof(struct ieee80211_mesh_route)) +
  213             ms->ms_ppath->mpp_privlen, M_80211_MESH_RT, M_NOWAIT | M_ZERO);
  214         if (rt != NULL) {
  215                 rt->rt_vap = vap;
  216                 IEEE80211_ADDR_COPY(rt->rt_dest, dest);
  217                 rt->rt_priv = (void *)ALIGN(&rt[1]);
  218                 mtx_init(&rt->rt_lock, "MBSS_RT", "802.11s route entry", MTX_DEF);
  219                 callout_init(&rt->rt_discovery, CALLOUT_MPSAFE);
  220                 rt->rt_updtime = ticks; /* create time */
  221                 TAILQ_INSERT_TAIL(&ms->ms_routes, rt, rt_next);
  222         }
  223         return rt;
  224 }
  225 
  226 struct ieee80211_mesh_route *
  227 ieee80211_mesh_rt_find(struct ieee80211vap *vap,
  228     const uint8_t dest[IEEE80211_ADDR_LEN])
  229 {
  230         struct ieee80211_mesh_state *ms = vap->iv_mesh;
  231         struct ieee80211_mesh_route *rt;
  232 
  233         MESH_RT_LOCK(ms);
  234         rt = mesh_rt_find_locked(ms, dest);
  235         MESH_RT_UNLOCK(ms);
  236         return rt;
  237 }
  238 
  239 struct ieee80211_mesh_route *
  240 ieee80211_mesh_rt_add(struct ieee80211vap *vap,
  241     const uint8_t dest[IEEE80211_ADDR_LEN])
  242 {
  243         struct ieee80211_mesh_state *ms = vap->iv_mesh;
  244         struct ieee80211_mesh_route *rt;
  245 
  246         KASSERT(ieee80211_mesh_rt_find(vap, dest) == NULL,
  247             ("%s: duplicate entry in the routing table", __func__));
  248         KASSERT(!IEEE80211_ADDR_EQ(vap->iv_myaddr, dest),
  249             ("%s: adding self to the routing table", __func__));
  250 
  251         MESH_RT_LOCK(ms);
  252         rt = mesh_rt_add_locked(vap, dest);
  253         MESH_RT_UNLOCK(ms);
  254         return rt;
  255 }
  256 
  257 /*
  258  * Update the route lifetime and returns the updated lifetime.
  259  * If new_lifetime is zero and route is timedout it will be invalidated.
  260  * new_lifetime is in msec
  261  */
  262 int
  263 ieee80211_mesh_rt_update(struct ieee80211_mesh_route *rt, int new_lifetime)
  264 {
  265         int timesince, now;
  266         uint32_t lifetime = 0;
  267 
  268         KASSERT(rt != NULL, ("route is NULL"));
  269 
  270         now = ticks;
  271         RT_ENTRY_LOCK(rt);
  272 
  273         /* dont clobber a proxy entry gated by us */
  274         if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY && rt->rt_nhops == 0) {
  275                 RT_ENTRY_UNLOCK(rt);
  276                 return rt->rt_lifetime;
  277         }
  278 
  279         timesince = ticks_to_msecs(now - rt->rt_updtime);
  280         rt->rt_updtime = now;
  281         if (timesince >= rt->rt_lifetime) {
  282                 if (new_lifetime != 0) {
  283                         rt->rt_lifetime = new_lifetime;
  284                 }
  285                 else {
  286                         rt->rt_flags &= ~IEEE80211_MESHRT_FLAGS_VALID;
  287                         rt->rt_lifetime = 0;
  288                 }
  289         } else {
  290                 /* update what is left of lifetime */
  291                 rt->rt_lifetime = rt->rt_lifetime - timesince;
  292                 rt->rt_lifetime  = MESH_ROUTE_LIFETIME_MAX(
  293                         new_lifetime, rt->rt_lifetime);
  294         }
  295         lifetime = rt->rt_lifetime;
  296         RT_ENTRY_UNLOCK(rt);
  297 
  298         return lifetime;
  299 }
  300 
  301 /*
  302  * Add a proxy route (as needed) for the specified destination.
  303  */
  304 void
  305 ieee80211_mesh_proxy_check(struct ieee80211vap *vap,
  306     const uint8_t dest[IEEE80211_ADDR_LEN])
  307 {
  308         struct ieee80211_mesh_state *ms = vap->iv_mesh;
  309         struct ieee80211_mesh_route *rt;
  310 
  311         MESH_RT_LOCK(ms);
  312         rt = mesh_rt_find_locked(ms, dest);
  313         if (rt == NULL) {
  314                 rt = mesh_rt_add_locked(vap, dest);
  315                 if (rt == NULL) {
  316                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
  317                             "%s", "unable to add proxy entry");
  318                         vap->iv_stats.is_mesh_rtaddfailed++;
  319                 } else {
  320                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
  321                             "%s", "add proxy entry");
  322                         IEEE80211_ADDR_COPY(rt->rt_mesh_gate, vap->iv_myaddr);
  323                         IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr);
  324                         rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID
  325                                      |  IEEE80211_MESHRT_FLAGS_PROXY;
  326                 }
  327         } else if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) {
  328                 KASSERT(rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY,
  329                     ("no proxy flag for poxy entry"));
  330                 struct ieee80211com *ic = vap->iv_ic;
  331                 /*
  332                  * Fix existing entry created by received frames from
  333                  * stations that have some memory of dest.  We also
  334                  * flush any frames held on the staging queue; delivering
  335                  * them is too much trouble right now.
  336                  */
  337                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
  338                     "%s", "fix proxy entry");
  339                 IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr);
  340                 rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID
  341                              |  IEEE80211_MESHRT_FLAGS_PROXY;
  342                 /* XXX belongs in hwmp */
  343                 ieee80211_ageq_drain_node(&ic->ic_stageq,
  344                    (void *)(uintptr_t) ieee80211_mac_hash(ic, dest));
  345                 /* XXX stat? */
  346         }
  347         MESH_RT_UNLOCK(ms);
  348 }
  349 
  350 static __inline void
  351 mesh_rt_del(struct ieee80211_mesh_state *ms, struct ieee80211_mesh_route *rt)
  352 {
  353         TAILQ_REMOVE(&ms->ms_routes, rt, rt_next);
  354         /*
  355          * Grab the lock before destroying it, to be sure no one else
  356          * is holding the route.
  357          */
  358         RT_ENTRY_LOCK(rt);
  359         callout_drain(&rt->rt_discovery);
  360         mtx_destroy(&rt->rt_lock);
  361         free(rt, M_80211_MESH_RT);
  362 }
  363 
  364 void
  365 ieee80211_mesh_rt_del(struct ieee80211vap *vap,
  366     const uint8_t dest[IEEE80211_ADDR_LEN])
  367 {
  368         struct ieee80211_mesh_state *ms = vap->iv_mesh;
  369         struct ieee80211_mesh_route *rt, *next;
  370 
  371         MESH_RT_LOCK(ms);
  372         TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) {
  373                 if (IEEE80211_ADDR_EQ(rt->rt_dest, dest)) {
  374                         if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) {
  375                                 ms->ms_ppath->mpp_senderror(vap, dest, rt,
  376                                     IEEE80211_REASON_MESH_PERR_NO_PROXY);
  377                         } else {
  378                                 ms->ms_ppath->mpp_senderror(vap, dest, rt,
  379                                     IEEE80211_REASON_MESH_PERR_DEST_UNREACH);
  380                         }
  381                         mesh_rt_del(ms, rt);
  382                         MESH_RT_UNLOCK(ms);
  383                         return;
  384                 }
  385         }
  386         MESH_RT_UNLOCK(ms);
  387 }
  388 
  389 void
  390 ieee80211_mesh_rt_flush(struct ieee80211vap *vap)
  391 {
  392         struct ieee80211_mesh_state *ms = vap->iv_mesh;
  393         struct ieee80211_mesh_route *rt, *next;
  394 
  395         if (ms == NULL)
  396                 return;
  397         MESH_RT_LOCK(ms);
  398         TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next)
  399                 mesh_rt_del(ms, rt);
  400         MESH_RT_UNLOCK(ms);
  401 }
  402 
  403 void
  404 ieee80211_mesh_rt_flush_peer(struct ieee80211vap *vap,
  405     const uint8_t peer[IEEE80211_ADDR_LEN])
  406 {
  407         struct ieee80211_mesh_state *ms = vap->iv_mesh;
  408         struct ieee80211_mesh_route *rt, *next;
  409 
  410         MESH_RT_LOCK(ms);
  411         TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) {
  412                 if (IEEE80211_ADDR_EQ(rt->rt_nexthop, peer))
  413                         mesh_rt_del(ms, rt);
  414         }
  415         MESH_RT_UNLOCK(ms);
  416 }
  417 
  418 /*
  419  * Flush expired routing entries, i.e. those in invalid state for
  420  * some time.
  421  */
  422 static void
  423 mesh_rt_flush_invalid(struct ieee80211vap *vap)
  424 {
  425         struct ieee80211_mesh_state *ms = vap->iv_mesh;
  426         struct ieee80211_mesh_route *rt, *next;
  427 
  428         if (ms == NULL)
  429                 return;
  430         MESH_RT_LOCK(ms);
  431         TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) {
  432                 /* Discover paths will be deleted by their own callout */
  433                 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_DISCOVER)
  434                         continue;
  435                 ieee80211_mesh_rt_update(rt, 0);
  436                 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0)
  437                         mesh_rt_del(ms, rt);
  438         }
  439         MESH_RT_UNLOCK(ms);
  440 }
  441 
  442 #define N(a)    (sizeof(a) / sizeof(a[0]))
  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 < N(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 < N(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 < N(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 < N(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 #undef  N
  512 
  513 static void
  514 mesh_gatemode_setup(struct ieee80211vap *vap)
  515 {
  516         struct ieee80211_mesh_state *ms = vap->iv_mesh;
  517 
  518         /*
  519          * NB: When a mesh gate is running as a ROOT it shall
  520          * not send out periodic GANNs but instead mark the
  521          * mesh gate flag for the corresponding proactive PREQ
  522          * and RANN frames.
  523          */
  524         if (ms->ms_flags & IEEE80211_MESHFLAGS_ROOT ||
  525             (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) == 0) {
  526                 callout_drain(&ms->ms_gatetimer);
  527                 return ;
  528         }
  529         callout_reset(&ms->ms_gatetimer, ieee80211_mesh_gateint,
  530             mesh_gatemode_cb, vap);
  531 }
  532 
  533 static void
  534 mesh_gatemode_cb(void *arg)
  535 {
  536         struct ieee80211vap *vap = (struct ieee80211vap *)arg;
  537         struct ieee80211_mesh_state *ms = vap->iv_mesh;
  538         struct ieee80211_meshgann_ie gann;
  539 
  540         gann.gann_flags = 0; /* Reserved */
  541         gann.gann_hopcount = 0;
  542         gann.gann_ttl = ms->ms_ttl;
  543         IEEE80211_ADDR_COPY(gann.gann_addr, vap->iv_myaddr);
  544         gann.gann_seq = ms->ms_gateseq++;
  545         gann.gann_interval = ieee80211_mesh_gateint;
  546 
  547         IEEE80211_NOTE(vap, IEEE80211_MSG_MESH, vap->iv_bss,
  548             "send broadcast GANN (seq %u)", gann.gann_seq);
  549 
  550         ieee80211_send_action(vap->iv_bss, IEEE80211_ACTION_CAT_MESH,
  551             IEEE80211_ACTION_MESH_GANN, &gann);
  552         mesh_gatemode_setup(vap);
  553 }
  554 
  555 static void
  556 ieee80211_mesh_init(void)
  557 {
  558 
  559         memset(mesh_proto_paths, 0, sizeof(mesh_proto_paths));
  560         memset(mesh_proto_metrics, 0, sizeof(mesh_proto_metrics));
  561 
  562         /*
  563          * Setup mesh parameters that depends on the clock frequency.
  564          */
  565         ieee80211_mesh_gateint = msecs_to_ticks(10000);
  566         ieee80211_mesh_retrytimeout = msecs_to_ticks(40);
  567         ieee80211_mesh_holdingtimeout = msecs_to_ticks(40);
  568         ieee80211_mesh_confirmtimeout = msecs_to_ticks(40);
  569         ieee80211_mesh_backofftimeout = msecs_to_ticks(5000);
  570 
  571         /*
  572          * Register action frame handlers.
  573          */
  574         ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
  575             IEEE80211_ACTION_MESHPEERING_OPEN,
  576             mesh_recv_action_meshpeering_open);
  577         ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
  578             IEEE80211_ACTION_MESHPEERING_CONFIRM,
  579             mesh_recv_action_meshpeering_confirm);
  580         ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
  581             IEEE80211_ACTION_MESHPEERING_CLOSE,
  582             mesh_recv_action_meshpeering_close);
  583         ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESH,
  584             IEEE80211_ACTION_MESH_LMETRIC, mesh_recv_action_meshlmetric);
  585         ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESH,
  586             IEEE80211_ACTION_MESH_GANN, mesh_recv_action_meshgate);
  587 
  588         ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
  589             IEEE80211_ACTION_MESHPEERING_OPEN,
  590             mesh_send_action_meshpeering_open);
  591         ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
  592             IEEE80211_ACTION_MESHPEERING_CONFIRM,
  593             mesh_send_action_meshpeering_confirm);
  594         ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
  595             IEEE80211_ACTION_MESHPEERING_CLOSE,
  596             mesh_send_action_meshpeering_close);
  597         ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESH,
  598             IEEE80211_ACTION_MESH_LMETRIC,
  599             mesh_send_action_meshlmetric);
  600         ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESH,
  601             IEEE80211_ACTION_MESH_GANN,
  602             mesh_send_action_meshgate);
  603 
  604         /*
  605          * Register Airtime Link Metric.
  606          */
  607         ieee80211_mesh_register_proto_metric(&mesh_metric_airtime);
  608 
  609 }
  610 SYSINIT(wlan_mesh, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_mesh_init, NULL);
  611 
  612 void
  613 ieee80211_mesh_attach(struct ieee80211com *ic)
  614 {
  615         ic->ic_vattach[IEEE80211_M_MBSS] = mesh_vattach;
  616 }
  617 
  618 void
  619 ieee80211_mesh_detach(struct ieee80211com *ic)
  620 {
  621 }
  622 
  623 static void
  624 mesh_vdetach_peers(void *arg, struct ieee80211_node *ni)
  625 {
  626         struct ieee80211com *ic = ni->ni_ic;
  627         uint16_t args[3];
  628 
  629         if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED) {
  630                 args[0] = ni->ni_mlpid;
  631                 args[1] = ni->ni_mllid;
  632                 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
  633                 ieee80211_send_action(ni,
  634                     IEEE80211_ACTION_CAT_SELF_PROT,
  635                     IEEE80211_ACTION_MESHPEERING_CLOSE,
  636                     args);
  637         }
  638         callout_drain(&ni->ni_mltimer);
  639         /* XXX belongs in hwmp */
  640         ieee80211_ageq_drain_node(&ic->ic_stageq,
  641            (void *)(uintptr_t) ieee80211_mac_hash(ic, ni->ni_macaddr));
  642 }
  643 
  644 static void
  645 mesh_vdetach(struct ieee80211vap *vap)
  646 {
  647         struct ieee80211_mesh_state *ms = vap->iv_mesh;
  648 
  649         callout_drain(&ms->ms_cleantimer);
  650         ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_vdetach_peers,
  651             NULL);
  652         ieee80211_mesh_rt_flush(vap);
  653         mtx_destroy(&ms->ms_rt_lock);
  654         ms->ms_ppath->mpp_vdetach(vap);
  655         free(vap->iv_mesh, M_80211_VAP);
  656         vap->iv_mesh = NULL;
  657 }
  658 
  659 static void
  660 mesh_vattach(struct ieee80211vap *vap)
  661 {
  662         struct ieee80211_mesh_state *ms;
  663         vap->iv_newstate = mesh_newstate;
  664         vap->iv_input = mesh_input;
  665         vap->iv_opdetach = mesh_vdetach;
  666         vap->iv_recv_mgmt = mesh_recv_mgmt;
  667         vap->iv_recv_ctl = mesh_recv_ctl;
  668         ms = malloc(sizeof(struct ieee80211_mesh_state), M_80211_VAP,
  669             M_NOWAIT | M_ZERO);
  670         if (ms == NULL) {
  671                 printf("%s: couldn't alloc MBSS state\n", __func__);
  672                 return;
  673         }
  674         vap->iv_mesh = ms;
  675         ms->ms_seq = 0;
  676         ms->ms_flags = (IEEE80211_MESHFLAGS_AP | IEEE80211_MESHFLAGS_FWD);
  677         ms->ms_ttl = IEEE80211_MESH_DEFAULT_TTL;
  678         TAILQ_INIT(&ms->ms_known_gates);
  679         TAILQ_INIT(&ms->ms_routes);
  680         mtx_init(&ms->ms_rt_lock, "MBSS", "802.11s routing table", MTX_DEF);
  681         callout_init(&ms->ms_cleantimer, CALLOUT_MPSAFE);
  682         callout_init(&ms->ms_gatetimer, CALLOUT_MPSAFE);
  683         ms->ms_gateseq = 0;
  684         mesh_select_proto_metric(vap, "AIRTIME");
  685         KASSERT(ms->ms_pmetric, ("ms_pmetric == NULL"));
  686         mesh_select_proto_path(vap, "HWMP");
  687         KASSERT(ms->ms_ppath, ("ms_ppath == NULL"));
  688         ms->ms_ppath->mpp_vattach(vap);
  689 }
  690 
  691 /*
  692  * IEEE80211_M_MBSS vap state machine handler.
  693  */
  694 static int
  695 mesh_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
  696 {
  697         struct ieee80211_mesh_state *ms = vap->iv_mesh;
  698         struct ieee80211com *ic = vap->iv_ic;
  699         struct ieee80211_node *ni;
  700         enum ieee80211_state ostate;
  701 
  702         IEEE80211_LOCK_ASSERT(ic);
  703 
  704         ostate = vap->iv_state;
  705         IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n",
  706             __func__, ieee80211_state_name[ostate],
  707             ieee80211_state_name[nstate], arg);
  708         vap->iv_state = nstate;         /* state transition */
  709         if (ostate != IEEE80211_S_SCAN)
  710                 ieee80211_cancel_scan(vap);     /* background scan */
  711         ni = vap->iv_bss;                       /* NB: no reference held */
  712         if (nstate != IEEE80211_S_RUN && ostate == IEEE80211_S_RUN) {
  713                 callout_drain(&ms->ms_cleantimer);
  714                 callout_drain(&ms->ms_gatetimer);
  715         }
  716         switch (nstate) {
  717         case IEEE80211_S_INIT:
  718                 switch (ostate) {
  719                 case IEEE80211_S_SCAN:
  720                         ieee80211_cancel_scan(vap);
  721                         break;
  722                 case IEEE80211_S_CAC:
  723                         ieee80211_dfs_cac_stop(vap);
  724                         break;
  725                 case IEEE80211_S_RUN:
  726                         ieee80211_iterate_nodes(&ic->ic_sta,
  727                             mesh_vdetach_peers, NULL);
  728                         break;
  729                 default:
  730                         break;
  731                 }
  732                 if (ostate != IEEE80211_S_INIT) {
  733                         /* NB: optimize INIT -> INIT case */
  734                         ieee80211_reset_bss(vap);
  735                         ieee80211_mesh_rt_flush(vap);
  736                 }
  737                 break;
  738         case IEEE80211_S_SCAN:
  739                 switch (ostate) {
  740                 case IEEE80211_S_INIT:
  741                         if (vap->iv_des_chan != IEEE80211_CHAN_ANYC &&
  742                             !IEEE80211_IS_CHAN_RADAR(vap->iv_des_chan) &&
  743                             ms->ms_idlen != 0) {
  744                                 /*
  745                                  * Already have a channel and a mesh ID; bypass
  746                                  * the scan and startup immediately.
  747                                  */
  748                                 ieee80211_create_ibss(vap, vap->iv_des_chan);
  749                                 break;
  750                         }
  751                         /*
  752                          * Initiate a scan.  We can come here as a result
  753                          * of an IEEE80211_IOC_SCAN_REQ too in which case
  754                          * the vap will be marked with IEEE80211_FEXT_SCANREQ
  755                          * and the scan request parameters will be present
  756                          * in iv_scanreq.  Otherwise we do the default.
  757                         */
  758                         if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) {
  759                                 ieee80211_check_scan(vap,
  760                                     vap->iv_scanreq_flags,
  761                                     vap->iv_scanreq_duration,
  762                                     vap->iv_scanreq_mindwell,
  763                                     vap->iv_scanreq_maxdwell,
  764                                     vap->iv_scanreq_nssid, vap->iv_scanreq_ssid);
  765                                 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ;
  766                         } else
  767                                 ieee80211_check_scan_current(vap);
  768                         break;
  769                 default:
  770                         break;
  771                 }
  772                 break;
  773         case IEEE80211_S_CAC:
  774                 /*
  775                  * Start CAC on a DFS channel.  We come here when starting
  776                  * a bss on a DFS channel (see ieee80211_create_ibss).
  777                  */
  778                 ieee80211_dfs_cac_start(vap);
  779                 break;
  780         case IEEE80211_S_RUN:
  781                 switch (ostate) {
  782                 case IEEE80211_S_INIT:
  783                         /*
  784                          * Already have a channel; bypass the
  785                          * scan and startup immediately.
  786                          * Note that ieee80211_create_ibss will call
  787                          * back to do a RUN->RUN state change.
  788                          */
  789                         ieee80211_create_ibss(vap,
  790                             ieee80211_ht_adjust_channel(ic,
  791                                 ic->ic_curchan, vap->iv_flags_ht));
  792                         /* NB: iv_bss is changed on return */
  793                         break;
  794                 case IEEE80211_S_CAC:
  795                         /*
  796                          * NB: This is the normal state change when CAC
  797                          * expires and no radar was detected; no need to
  798                          * clear the CAC timer as it's already expired.
  799                          */
  800                         /* fall thru... */
  801                 case IEEE80211_S_CSA:
  802 #if 0
  803                         /*
  804                          * Shorten inactivity timer of associated stations
  805                          * to weed out sta's that don't follow a CSA.
  806                          */
  807                         ieee80211_iterate_nodes(&ic->ic_sta, sta_csa, vap);
  808 #endif
  809                         /*
  810                          * Update bss node channel to reflect where
  811                          * we landed after CSA.
  812                          */
  813                         ieee80211_node_set_chan(vap->iv_bss,
  814                             ieee80211_ht_adjust_channel(ic, ic->ic_curchan,
  815                                 ieee80211_htchanflags(vap->iv_bss->ni_chan)));
  816                         /* XXX bypass debug msgs */
  817                         break;
  818                 case IEEE80211_S_SCAN:
  819                 case IEEE80211_S_RUN:
  820 #ifdef IEEE80211_DEBUG
  821                         if (ieee80211_msg_debug(vap)) {
  822                                 struct ieee80211_node *ni = vap->iv_bss;
  823                                 ieee80211_note(vap,
  824                                     "synchronized with %s meshid ",
  825                                     ether_sprintf(ni->ni_meshid));
  826                                 ieee80211_print_essid(ni->ni_meshid,
  827                                     ni->ni_meshidlen);
  828                                 /* XXX MCS/HT */
  829                                 printf(" channel %d\n",
  830                                     ieee80211_chan2ieee(ic, ic->ic_curchan));
  831                         }
  832 #endif
  833                         break;
  834                 default:
  835                         break;
  836                 }
  837                 ieee80211_node_authorize(vap->iv_bss);
  838                 callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact,
  839                     mesh_rt_cleanup_cb, vap);
  840                 mesh_gatemode_setup(vap);
  841                 break;
  842         default:
  843                 break;
  844         }
  845         /* NB: ostate not nstate */
  846         ms->ms_ppath->mpp_newstate(vap, ostate, arg);
  847         return 0;
  848 }
  849 
  850 static void
  851 mesh_rt_cleanup_cb(void *arg)
  852 {
  853         struct ieee80211vap *vap = arg;
  854         struct ieee80211_mesh_state *ms = vap->iv_mesh;
  855 
  856         mesh_rt_flush_invalid(vap);
  857         callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact,
  858             mesh_rt_cleanup_cb, vap);
  859 }
  860 
  861 /*
  862  * Mark a mesh STA as gate and return a pointer to it.
  863  * If this is first time, we create a new gate route.
  864  * Always update the path route to this mesh gate.
  865  */
  866 struct ieee80211_mesh_gate_route *
  867 ieee80211_mesh_mark_gate(struct ieee80211vap *vap, const uint8_t *addr,
  868     struct ieee80211_mesh_route *rt)
  869 {
  870         struct ieee80211_mesh_state *ms = vap->iv_mesh;
  871         struct ieee80211_mesh_gate_route *gr = NULL, *next;
  872         int found = 0;
  873 
  874         MESH_RT_LOCK(ms);
  875         TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) {
  876                 if (IEEE80211_ADDR_EQ(gr->gr_addr, addr)) {
  877                         found = 1;
  878                         break;
  879                 }
  880         }
  881 
  882         if (!found) {
  883                 /* New mesh gate add it to known table. */
  884                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, addr,
  885                     "%s", "stored new gate information from pro-PREQ.");
  886                 gr = malloc(ALIGN(sizeof(struct ieee80211_mesh_gate_route)),
  887                     M_80211_MESH_GT_RT, M_NOWAIT | M_ZERO);
  888                 IEEE80211_ADDR_COPY(gr->gr_addr, addr);
  889                 TAILQ_INSERT_TAIL(&ms->ms_known_gates, gr, gr_next);
  890         }
  891         gr->gr_route = rt;
  892         /* TODO: link from path route to gate route */
  893         MESH_RT_UNLOCK(ms);
  894 
  895         return gr;
  896 }
  897 
  898 
  899 /*
  900  * Helper function to note the Mesh Peer Link FSM change.
  901  */
  902 static void
  903 mesh_linkchange(struct ieee80211_node *ni, enum ieee80211_mesh_mlstate state)
  904 {
  905         struct ieee80211vap *vap = ni->ni_vap;
  906         struct ieee80211_mesh_state *ms = vap->iv_mesh;
  907 #ifdef IEEE80211_DEBUG
  908         static const char *meshlinkstates[] = {
  909                 [IEEE80211_NODE_MESH_IDLE]              = "IDLE",
  910                 [IEEE80211_NODE_MESH_OPENSNT]           = "OPEN SENT",
  911                 [IEEE80211_NODE_MESH_OPENRCV]           = "OPEN RECEIVED",
  912                 [IEEE80211_NODE_MESH_CONFIRMRCV]        = "CONFIRM RECEIVED",
  913                 [IEEE80211_NODE_MESH_ESTABLISHED]       = "ESTABLISHED",
  914                 [IEEE80211_NODE_MESH_HOLDING]           = "HOLDING"
  915         };
  916 #endif
  917         IEEE80211_NOTE(vap, IEEE80211_MSG_MESH,
  918             ni, "peer link: %s -> %s",
  919             meshlinkstates[ni->ni_mlstate], meshlinkstates[state]);
  920 
  921         /* track neighbor count */
  922         if (state == IEEE80211_NODE_MESH_ESTABLISHED &&
  923             ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) {
  924                 KASSERT(ms->ms_neighbors < 65535, ("neighbor count overflow"));
  925                 ms->ms_neighbors++;
  926                 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF);
  927         } else if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED &&
  928             state != IEEE80211_NODE_MESH_ESTABLISHED) {
  929                 KASSERT(ms->ms_neighbors > 0, ("neighbor count 0"));
  930                 ms->ms_neighbors--;
  931                 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF);
  932         }
  933         ni->ni_mlstate = state;
  934         switch (state) {
  935         case IEEE80211_NODE_MESH_HOLDING:
  936                 ms->ms_ppath->mpp_peerdown(ni);
  937                 break;
  938         case IEEE80211_NODE_MESH_ESTABLISHED:
  939                 ieee80211_mesh_discover(vap, ni->ni_macaddr, NULL);
  940                 break;
  941         default:
  942                 break;
  943         }
  944 }
  945 
  946 /*
  947  * Helper function to generate a unique local ID required for mesh
  948  * peer establishment.
  949  */
  950 static void
  951 mesh_checkid(void *arg, struct ieee80211_node *ni)
  952 {
  953         uint16_t *r = arg;
  954         
  955         if (*r == ni->ni_mllid)
  956                 *(uint16_t *)arg = 0;
  957 }
  958 
  959 static uint32_t
  960 mesh_generateid(struct ieee80211vap *vap)
  961 {
  962         int maxiter = 4;
  963         uint16_t r;
  964 
  965         do {
  966                 get_random_bytes(&r, 2);
  967                 ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_checkid, &r);
  968                 maxiter--;
  969         } while (r == 0 && maxiter > 0);
  970         return r;
  971 }
  972 
  973 /*
  974  * Verifies if we already received this packet by checking its
  975  * sequence number.
  976  * Returns 0 if the frame is to be accepted, 1 otherwise.
  977  */
  978 static int
  979 mesh_checkpseq(struct ieee80211vap *vap,
  980     const uint8_t source[IEEE80211_ADDR_LEN], uint32_t seq)
  981 {
  982         struct ieee80211_mesh_route *rt;
  983 
  984         rt = ieee80211_mesh_rt_find(vap, source);
  985         if (rt == NULL) {
  986                 rt = ieee80211_mesh_rt_add(vap, source);
  987                 if (rt == NULL) {
  988                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source,
  989                             "%s", "add mcast route failed");
  990                         vap->iv_stats.is_mesh_rtaddfailed++;
  991                         return 1;
  992                 }
  993                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source,
  994                     "add mcast route, mesh seqno %d", seq);
  995                 rt->rt_lastmseq = seq;
  996                 return 0;
  997         }
  998         if (IEEE80211_MESH_SEQ_GEQ(rt->rt_lastmseq, seq)) {
  999                 return 1;
 1000         } else {
 1001                 rt->rt_lastmseq = seq;
 1002                 return 0;
 1003         }
 1004 }
 1005 
 1006 /*
 1007  * Iterate the routing table and locate the next hop.
 1008  */
 1009 struct ieee80211_node *
 1010 ieee80211_mesh_find_txnode(struct ieee80211vap *vap,
 1011     const uint8_t dest[IEEE80211_ADDR_LEN])
 1012 {
 1013         struct ieee80211_mesh_route *rt;
 1014 
 1015         rt = ieee80211_mesh_rt_find(vap, dest);
 1016         if (rt == NULL)
 1017                 return NULL;
 1018         if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) {
 1019                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
 1020                     "%s: !valid, flags 0x%x", __func__, rt->rt_flags);
 1021                 /* XXX stat */
 1022                 return NULL;
 1023         }
 1024         if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) {
 1025                 rt = ieee80211_mesh_rt_find(vap, rt->rt_mesh_gate);
 1026                 if (rt == NULL) return NULL;
 1027                 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) {
 1028                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
 1029                             "%s: meshgate !valid, flags 0x%x", __func__,
 1030                             rt->rt_flags);
 1031                         /* XXX stat */
 1032                         return NULL;
 1033                 }
 1034         }
 1035         return ieee80211_find_txnode(vap, rt->rt_nexthop);
 1036 }
 1037 
 1038 static void
 1039 mesh_transmit_to_gate(struct ieee80211vap *vap, struct mbuf *m,
 1040     struct ieee80211_mesh_route *rt_gate)
 1041 {
 1042         struct ifnet *ifp = vap->iv_ifp;
 1043         struct ieee80211_node *ni;
 1044 
 1045         IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
 1046 
 1047         ni = ieee80211_mesh_find_txnode(vap, rt_gate->rt_dest);
 1048         if (ni == NULL) {
 1049                 ifp->if_oerrors++;
 1050                 m_freem(m);
 1051                 return;
 1052         }
 1053 
 1054         /*
 1055          * Send through the VAP packet transmit path.
 1056          * This consumes the node ref grabbed above and
 1057          * the mbuf, regardless of whether there's a problem
 1058          * or not.
 1059          */
 1060         (void) ieee80211_vap_pkt_send_dest(vap, m, ni);
 1061 }
 1062 
 1063 /*
 1064  * Forward the queued frames to known valid mesh gates.
 1065  * Assume destination to be outside the MBSS (i.e. proxy entry),
 1066  * If no valid mesh gates are known silently discard queued frames.
 1067  * After transmitting frames to all known valid mesh gates, this route
 1068  * will be marked invalid, and a new path discovery will happen in the hopes
 1069  * that (at least) one of the mesh gates have a new proxy entry for us to use.
 1070  */
 1071 void
 1072 ieee80211_mesh_forward_to_gates(struct ieee80211vap *vap,
 1073     struct ieee80211_mesh_route *rt_dest)
 1074 {
 1075         struct ieee80211com *ic = vap->iv_ic;
 1076         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 1077         struct ieee80211_mesh_route *rt_gate;
 1078         struct ieee80211_mesh_gate_route *gr = NULL, *gr_next;
 1079         struct mbuf *m, *mcopy, *next;
 1080 
 1081         IEEE80211_TX_UNLOCK_ASSERT(ic);
 1082 
 1083         KASSERT( rt_dest->rt_flags == IEEE80211_MESHRT_FLAGS_DISCOVER,
 1084             ("Route is not marked with IEEE80211_MESHRT_FLAGS_DISCOVER"));
 1085 
 1086         /* XXX: send to more than one valid mash gate */
 1087         MESH_RT_LOCK(ms);
 1088 
 1089         m = ieee80211_ageq_remove(&ic->ic_stageq,
 1090             (struct ieee80211_node *)(uintptr_t)
 1091             ieee80211_mac_hash(ic, rt_dest->rt_dest));
 1092 
 1093         TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, gr_next) {
 1094                 rt_gate = gr->gr_route;
 1095                 if (rt_gate == NULL) {
 1096                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP,
 1097                                 rt_dest->rt_dest,
 1098                                 "mesh gate with no path %6D",
 1099                                 gr->gr_addr, ":");
 1100                         continue;
 1101                 }
 1102                 if ((rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0)
 1103                         continue;
 1104                 KASSERT(rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_GATE,
 1105                     ("route not marked as a mesh gate"));
 1106                 KASSERT((rt_gate->rt_flags &
 1107                         IEEE80211_MESHRT_FLAGS_PROXY) == 0,
 1108                         ("found mesh gate that is also marked porxy"));
 1109                 /*
 1110                  * convert route to a proxy route gated by the current
 1111                  * mesh gate, this is needed so encap can built data
 1112                  * frame with correct address.
 1113                  */
 1114                 rt_dest->rt_flags = IEEE80211_MESHRT_FLAGS_PROXY |
 1115                         IEEE80211_MESHRT_FLAGS_VALID;
 1116                 rt_dest->rt_ext_seq = 1; /* random value */
 1117                 IEEE80211_ADDR_COPY(rt_dest->rt_mesh_gate, rt_gate->rt_dest);
 1118                 IEEE80211_ADDR_COPY(rt_dest->rt_nexthop, rt_gate->rt_nexthop);
 1119                 rt_dest->rt_metric = rt_gate->rt_metric;
 1120                 rt_dest->rt_nhops = rt_gate->rt_nhops;
 1121                 ieee80211_mesh_rt_update(rt_dest, ms->ms_ppath->mpp_inact);
 1122                 MESH_RT_UNLOCK(ms);
 1123                 /* XXX: lock?? */
 1124                 mcopy = m_dup(m, M_NOWAIT);
 1125                 for (; mcopy != NULL; mcopy = next) {
 1126                         next = mcopy->m_nextpkt;
 1127                         mcopy->m_nextpkt = NULL;
 1128                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP,
 1129                             rt_dest->rt_dest,
 1130                             "flush queued frame %p len %d", mcopy,
 1131                             mcopy->m_pkthdr.len);
 1132                         mesh_transmit_to_gate(vap, mcopy, rt_gate);
 1133                 }
 1134                 MESH_RT_LOCK(ms);
 1135         }
 1136         rt_dest->rt_flags = 0; /* Mark invalid */
 1137         m_freem(m);
 1138         MESH_RT_UNLOCK(ms);
 1139 }
 1140 
 1141 /*
 1142  * Forward the specified frame.
 1143  * Decrement the TTL and set TA to our MAC address.
 1144  */
 1145 static void
 1146 mesh_forward(struct ieee80211vap *vap, struct mbuf *m,
 1147     const struct ieee80211_meshcntl *mc)
 1148 {
 1149         struct ieee80211com *ic = vap->iv_ic;
 1150         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 1151         struct ifnet *ifp = vap->iv_ifp;
 1152         const struct ieee80211_frame *wh =
 1153             mtod(m, const struct ieee80211_frame *);
 1154         struct mbuf *mcopy;
 1155         struct ieee80211_meshcntl *mccopy;
 1156         struct ieee80211_frame *whcopy;
 1157         struct ieee80211_node *ni;
 1158         int err;
 1159 
 1160         /* This is called from the RX path - don't hold this lock */
 1161         IEEE80211_TX_UNLOCK_ASSERT(ic);
 1162 
 1163         /*
 1164          * mesh ttl of 1 means we are the last one receving it,
 1165          * according to amendment we decrement and then check if
 1166          * 0, if so we dont forward.
 1167          */
 1168         if (mc->mc_ttl < 1) {
 1169                 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
 1170                     "%s", "frame not fwd'd, ttl 1");
 1171                 vap->iv_stats.is_mesh_fwd_ttl++;
 1172                 return;
 1173         }
 1174         if (!(ms->ms_flags & IEEE80211_MESHFLAGS_FWD)) {
 1175                 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
 1176                     "%s", "frame not fwd'd, fwding disabled");
 1177                 vap->iv_stats.is_mesh_fwd_disabled++;
 1178                 return;
 1179         }
 1180         mcopy = m_dup(m, M_NOWAIT);
 1181         if (mcopy == NULL) {
 1182                 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
 1183                     "%s", "frame not fwd'd, cannot dup");
 1184                 vap->iv_stats.is_mesh_fwd_nobuf++;
 1185                 ifp->if_oerrors++;
 1186                 return;
 1187         }
 1188         mcopy = m_pullup(mcopy, ieee80211_hdrspace(ic, wh) +
 1189             sizeof(struct ieee80211_meshcntl));
 1190         if (mcopy == NULL) {
 1191                 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
 1192                     "%s", "frame not fwd'd, too short");
 1193                 vap->iv_stats.is_mesh_fwd_tooshort++;
 1194                 ifp->if_oerrors++;
 1195                 m_freem(mcopy);
 1196                 return;
 1197         }
 1198         whcopy = mtod(mcopy, struct ieee80211_frame *);
 1199         mccopy = (struct ieee80211_meshcntl *)
 1200             (mtod(mcopy, uint8_t *) + ieee80211_hdrspace(ic, wh));
 1201         /* XXX clear other bits? */
 1202         whcopy->i_fc[1] &= ~IEEE80211_FC1_RETRY;
 1203         IEEE80211_ADDR_COPY(whcopy->i_addr2, vap->iv_myaddr);
 1204         if (IEEE80211_IS_MULTICAST(wh->i_addr1)) {
 1205                 ni = ieee80211_ref_node(vap->iv_bss);
 1206                 mcopy->m_flags |= M_MCAST;
 1207         } else {
 1208                 ni = ieee80211_mesh_find_txnode(vap, whcopy->i_addr3);
 1209                 if (ni == NULL) {
 1210                         /*
 1211                          * [Optional] any of the following three actions:
 1212                          * o silently discard
 1213                          * o trigger a path discovery
 1214                          * o inform TA that meshDA is unknown.
 1215                          */
 1216                         IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
 1217                             "%s", "frame not fwd'd, no path");
 1218                         ms->ms_ppath->mpp_senderror(vap, whcopy->i_addr3, NULL,
 1219                             IEEE80211_REASON_MESH_PERR_NO_FI);
 1220                         vap->iv_stats.is_mesh_fwd_nopath++;
 1221                         m_freem(mcopy);
 1222                         return;
 1223                 }
 1224                 IEEE80211_ADDR_COPY(whcopy->i_addr1, ni->ni_macaddr);
 1225         }
 1226         KASSERT(mccopy->mc_ttl > 0, ("%s called with wrong ttl", __func__));
 1227         mccopy->mc_ttl--;
 1228 
 1229         /* XXX calculate priority so drivers can find the tx queue */
 1230         M_WME_SETAC(mcopy, WME_AC_BE);
 1231 
 1232         /* XXX do we know m_nextpkt is NULL? */
 1233         mcopy->m_pkthdr.rcvif = (void *) ni;
 1234 
 1235         /*
 1236          * XXX this bypasses all of the VAP TX handling; it passes frames
 1237          * directly to the parent interface.
 1238          *
 1239          * Because of this, there's no TX lock being held as there's no
 1240          * encaps state being used.
 1241          *
 1242          * Doing a direct parent transmit may not be the correct thing
 1243          * to do here; we'll have to re-think this soon.
 1244          */
 1245         IEEE80211_TX_LOCK(ic);
 1246         err = ieee80211_parent_xmitpkt(ic, mcopy);
 1247         IEEE80211_TX_UNLOCK(ic);
 1248         if (err != 0) {
 1249                 /* NB: IFQ_HANDOFF reclaims mbuf */
 1250                 ieee80211_free_node(ni);
 1251         } else {
 1252                 ifp->if_opackets++;
 1253         }
 1254 }
 1255 
 1256 static struct mbuf *
 1257 mesh_decap(struct ieee80211vap *vap, struct mbuf *m, int hdrlen, int meshdrlen)
 1258 {
 1259 #define WHDIR(wh)       ((wh)->i_fc[1] & IEEE80211_FC1_DIR_MASK)
 1260 #define MC01(mc)        ((const struct ieee80211_meshcntl_ae01 *)mc)
 1261         uint8_t b[sizeof(struct ieee80211_qosframe_addr4) +
 1262                   sizeof(struct ieee80211_meshcntl_ae10)];
 1263         const struct ieee80211_qosframe_addr4 *wh;
 1264         const struct ieee80211_meshcntl_ae10 *mc;
 1265         struct ether_header *eh;
 1266         struct llc *llc;
 1267         int ae;
 1268 
 1269         if (m->m_len < hdrlen + sizeof(*llc) &&
 1270             (m = m_pullup(m, hdrlen + sizeof(*llc))) == NULL) {
 1271                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ANY,
 1272                     "discard data frame: %s", "m_pullup failed");
 1273                 vap->iv_stats.is_rx_tooshort++;
 1274                 return NULL;
 1275         }
 1276         memcpy(b, mtod(m, caddr_t), hdrlen);
 1277         wh = (const struct ieee80211_qosframe_addr4 *)&b[0];
 1278         mc = (const struct ieee80211_meshcntl_ae10 *)&b[hdrlen - meshdrlen];
 1279         KASSERT(WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS ||
 1280                 WHDIR(wh) == IEEE80211_FC1_DIR_DSTODS,
 1281             ("bogus dir, fc 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1]));
 1282 
 1283         llc = (struct llc *)(mtod(m, caddr_t) + hdrlen);
 1284         if (llc->llc_dsap == LLC_SNAP_LSAP && llc->llc_ssap == LLC_SNAP_LSAP &&
 1285             llc->llc_control == LLC_UI && llc->llc_snap.org_code[0] == 0 &&
 1286             llc->llc_snap.org_code[1] == 0 && llc->llc_snap.org_code[2] == 0 &&
 1287             /* NB: preserve AppleTalk frames that have a native SNAP hdr */
 1288             !(llc->llc_snap.ether_type == htons(ETHERTYPE_AARP) ||
 1289               llc->llc_snap.ether_type == htons(ETHERTYPE_IPX))) {
 1290                 m_adj(m, hdrlen + sizeof(struct llc) - sizeof(*eh));
 1291                 llc = NULL;
 1292         } else {
 1293                 m_adj(m, hdrlen - sizeof(*eh));
 1294         }
 1295         eh = mtod(m, struct ether_header *);
 1296         ae = mc->mc_flags & IEEE80211_MESH_AE_MASK;
 1297         if (WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS) {
 1298                 IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr1);
 1299                 if (ae == IEEE80211_MESH_AE_00) {
 1300                         IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr3);
 1301                 } else if (ae == IEEE80211_MESH_AE_01) {
 1302                         IEEE80211_ADDR_COPY(eh->ether_shost,
 1303                             MC01(mc)->mc_addr4);
 1304                 } else {
 1305                         IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
 1306                             (const struct ieee80211_frame *)wh, NULL,
 1307                             "bad AE %d", ae);
 1308                         vap->iv_stats.is_mesh_badae++;
 1309                         m_freem(m);
 1310                         return NULL;
 1311                 }
 1312         } else {
 1313                 if (ae == IEEE80211_MESH_AE_00) {
 1314                         IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr3);
 1315                         IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr4);
 1316                 } else if (ae == IEEE80211_MESH_AE_10) {
 1317                         IEEE80211_ADDR_COPY(eh->ether_dhost, mc->mc_addr5);
 1318                         IEEE80211_ADDR_COPY(eh->ether_shost, mc->mc_addr6);
 1319                 } else {
 1320                         IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
 1321                             (const struct ieee80211_frame *)wh, NULL,
 1322                             "bad AE %d", ae);
 1323                         vap->iv_stats.is_mesh_badae++;
 1324                         m_freem(m);
 1325                         return NULL;
 1326                 }
 1327         }
 1328 #ifndef __NO_STRICT_ALIGNMENT
 1329         if (!ALIGNED_POINTER(mtod(m, caddr_t) + sizeof(*eh), uint32_t)) {
 1330                 m = ieee80211_realign(vap, m, sizeof(*eh));
 1331                 if (m == NULL)
 1332                         return NULL;
 1333         }
 1334 #endif /* !__NO_STRICT_ALIGNMENT */
 1335         if (llc != NULL) {
 1336                 eh = mtod(m, struct ether_header *);
 1337                 eh->ether_type = htons(m->m_pkthdr.len - sizeof(*eh));
 1338         }
 1339         return m;
 1340 #undef  WDIR
 1341 #undef  MC01
 1342 }
 1343 
 1344 /*
 1345  * Return non-zero if the unicast mesh data frame should be processed
 1346  * locally.  Frames that are not proxy'd have our address, otherwise
 1347  * we need to consult the routing table to look for a proxy entry.
 1348  */
 1349 static __inline int
 1350 mesh_isucastforme(struct ieee80211vap *vap, const struct ieee80211_frame *wh,
 1351     const struct ieee80211_meshcntl *mc)
 1352 {
 1353         int ae = mc->mc_flags & 3;
 1354 
 1355         KASSERT((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) == IEEE80211_FC1_DIR_DSTODS,
 1356             ("bad dir 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1]));
 1357         KASSERT(ae == IEEE80211_MESH_AE_00 || ae == IEEE80211_MESH_AE_10,
 1358             ("bad AE %d", ae));
 1359         if (ae == IEEE80211_MESH_AE_10) {       /* ucast w/ proxy */
 1360                 const struct ieee80211_meshcntl_ae10 *mc10 =
 1361                     (const struct ieee80211_meshcntl_ae10 *) mc;
 1362                 struct ieee80211_mesh_route *rt =
 1363                     ieee80211_mesh_rt_find(vap, mc10->mc_addr5);
 1364                 /* check for proxy route to ourself */
 1365                 return (rt != NULL &&
 1366                     (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY));
 1367         } else                                  /* ucast w/o proxy */
 1368                 return IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_myaddr);
 1369 }
 1370 
 1371 /*
 1372  * Verifies transmitter, updates lifetime, precursor list and forwards data.
 1373  * > 0 means we have forwarded data and no need to process locally
 1374  * == 0 means we want to process locally (and we may have forwarded data
 1375  * < 0 means there was an error and data should be discarded
 1376  */
 1377 static int
 1378 mesh_recv_indiv_data_to_fwrd(struct ieee80211vap *vap, struct mbuf *m,
 1379     struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc)
 1380 {
 1381         struct ieee80211_qosframe_addr4 *qwh;
 1382         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 1383         struct ieee80211_mesh_route *rt_meshda, *rt_meshsa;
 1384 
 1385         /* This is called from the RX path - don't hold this lock */
 1386         IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
 1387 
 1388         qwh = (struct ieee80211_qosframe_addr4 *)wh;
 1389 
 1390         /*
 1391          * TODO:
 1392          * o verify addr2 is  a legitimate transmitter
 1393          * o lifetime of precursor of addr3 (addr2) is max(init, curr)
 1394          * o lifetime of precursor of addr4 (nexthop) is max(init, curr)
 1395          */
 1396 
 1397         /* set lifetime of addr3 (meshDA) to initial value */
 1398         rt_meshda = ieee80211_mesh_rt_find(vap, qwh->i_addr3);
 1399         if (rt_meshda == NULL) {
 1400                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, qwh->i_addr2,
 1401                     "no route to meshDA(%6D)", qwh->i_addr3, ":");
 1402                 /*
 1403                  * [Optional] any of the following three actions:
 1404                  * o silently discard                           [X]
 1405                  * o trigger a path discovery                   [ ]
 1406                  * o inform TA that meshDA is unknown.          [ ]
 1407                  */
 1408                 /* XXX: stats */
 1409                 return (-1);
 1410         }
 1411 
 1412         ieee80211_mesh_rt_update(rt_meshda, ticks_to_msecs(
 1413             ms->ms_ppath->mpp_inact));
 1414 
 1415         /* set lifetime of addr4 (meshSA) to initial value */
 1416         rt_meshsa = ieee80211_mesh_rt_find(vap, qwh->i_addr4);
 1417         KASSERT(rt_meshsa != NULL, ("no route"));
 1418         ieee80211_mesh_rt_update(rt_meshsa, ticks_to_msecs(
 1419             ms->ms_ppath->mpp_inact));
 1420 
 1421         mesh_forward(vap, m, mc);
 1422         return (1); /* dont process locally */
 1423 }
 1424 
 1425 /*
 1426  * Verifies transmitter, updates lifetime, precursor list and process data
 1427  * locally, if data is proxy with AE = 10 it could mean data should go
 1428  * on another mesh path or data should be forwarded to the DS.
 1429  *
 1430  * > 0 means we have forwarded data and no need to process locally
 1431  * == 0 means we want to process locally (and we may have forwarded data
 1432  * < 0 means there was an error and data should be discarded
 1433  */
 1434 static int
 1435 mesh_recv_indiv_data_to_me(struct ieee80211vap *vap, struct mbuf *m,
 1436     struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc)
 1437 {
 1438         struct ieee80211_qosframe_addr4 *qwh;
 1439         const struct ieee80211_meshcntl_ae10 *mc10;
 1440         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 1441         struct ieee80211_mesh_route *rt;
 1442         int ae;
 1443 
 1444         /* This is called from the RX path - don't hold this lock */
 1445         IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
 1446 
 1447         qwh = (struct ieee80211_qosframe_addr4 *)wh;
 1448         mc10 = (const struct ieee80211_meshcntl_ae10 *)mc;
 1449 
 1450         /*
 1451          * TODO:
 1452          * o verify addr2 is  a legitimate transmitter
 1453          * o lifetime of precursor entry is max(init, curr)
 1454          */
 1455 
 1456         /* set lifetime of addr4 (meshSA) to initial value */
 1457         rt = ieee80211_mesh_rt_find(vap, qwh->i_addr4);
 1458         KASSERT(rt != NULL, ("no route"));
 1459         ieee80211_mesh_rt_update(rt, ticks_to_msecs(ms->ms_ppath->mpp_inact));
 1460         rt = NULL;
 1461 
 1462         ae = mc10->mc_flags & IEEE80211_MESH_AE_MASK;
 1463         KASSERT(ae == IEEE80211_MESH_AE_00 ||
 1464             ae == IEEE80211_MESH_AE_10, ("bad AE %d", ae));
 1465         if (ae == IEEE80211_MESH_AE_10) {
 1466                 if (IEEE80211_ADDR_EQ(mc10->mc_addr5, qwh->i_addr3)) {
 1467                         return (0); /* process locally */
 1468                 }
 1469 
 1470                 rt =  ieee80211_mesh_rt_find(vap, mc10->mc_addr5);
 1471                 if (rt != NULL &&
 1472                     (rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) &&
 1473                     (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) == 0) {
 1474                         /*
 1475                          * Forward on another mesh-path, according to
 1476                          * amendment as specified in 9.32.4.1
 1477                          */
 1478                         IEEE80211_ADDR_COPY(qwh->i_addr3, mc10->mc_addr5);
 1479                         mesh_forward(vap, m,
 1480                             (const struct ieee80211_meshcntl *)mc10);
 1481                         return (1); /* dont process locally */
 1482                 }
 1483                 /*
 1484                  * All other cases: forward of MSDUs from the MBSS to DS indiv.
 1485                  * addressed according to 13.11.3.2.
 1486                  */
 1487                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, qwh->i_addr2,
 1488                     "forward frame to DS, SA(%6D) DA(%6D)",
 1489                     mc10->mc_addr6, ":", mc10->mc_addr5, ":");
 1490         }
 1491         return (0); /* process locally */
 1492 }
 1493 
 1494 /*
 1495  * Try to forward the group addressed data on to other mesh STAs, and
 1496  * also to the DS.
 1497  *
 1498  * > 0 means we have forwarded data and no need to process locally
 1499  * == 0 means we want to process locally (and we may have forwarded data
 1500  * < 0 means there was an error and data should be discarded
 1501  */
 1502 static int
 1503 mesh_recv_group_data(struct ieee80211vap *vap, struct mbuf *m,
 1504     struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc)
 1505 {
 1506 #define MC01(mc)        ((const struct ieee80211_meshcntl_ae01 *)mc)
 1507         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 1508 
 1509         /* This is called from the RX path - don't hold this lock */
 1510         IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
 1511 
 1512         mesh_forward(vap, m, mc);
 1513 
 1514         if(mc->mc_ttl > 0) {
 1515                 if (mc->mc_flags & IEEE80211_MESH_AE_01) {
 1516                         /*
 1517                          * Forward of MSDUs from the MBSS to DS group addressed
 1518                          * (according to 13.11.3.2)
 1519                          * This happens by delivering the packet, and a bridge
 1520                          * will sent it on another port member.
 1521                          */
 1522                         if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE &&
 1523                             ms->ms_flags & IEEE80211_MESHFLAGS_FWD)
 1524                                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH,
 1525                                     MC01(mc)->mc_addr4, "%s",
 1526                                     "forward from MBSS to the DS");
 1527                 }
 1528         }
 1529         return (0); /* process locally */
 1530 #undef  MC01
 1531 }
 1532 
 1533 static int
 1534 mesh_input(struct ieee80211_node *ni, struct mbuf *m, int rssi, int nf)
 1535 {
 1536 #define HAS_SEQ(type)   ((type & 0x4) == 0)
 1537 #define MC01(mc)        ((const struct ieee80211_meshcntl_ae01 *)mc)
 1538 #define MC10(mc)        ((const struct ieee80211_meshcntl_ae10 *)mc)
 1539         struct ieee80211vap *vap = ni->ni_vap;
 1540         struct ieee80211com *ic = ni->ni_ic;
 1541         struct ifnet *ifp = vap->iv_ifp;
 1542         struct ieee80211_frame *wh;
 1543         const struct ieee80211_meshcntl *mc;
 1544         int hdrspace, meshdrlen, need_tap, error;
 1545         uint8_t dir, type, subtype, ae;
 1546         uint32_t seq;
 1547         const uint8_t *addr;
 1548         uint8_t qos[2];
 1549         ieee80211_seq rxseq;
 1550 
 1551         KASSERT(ni != NULL, ("null node"));
 1552         ni->ni_inact = ni->ni_inact_reload;
 1553 
 1554         need_tap = 1;                   /* mbuf need to be tapped. */
 1555         type = -1;                      /* undefined */
 1556 
 1557         /* This is called from the RX path - don't hold this lock */
 1558         IEEE80211_TX_UNLOCK_ASSERT(ic);
 1559 
 1560         if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) {
 1561                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
 1562                     ni->ni_macaddr, NULL,
 1563                     "too short (1): len %u", m->m_pkthdr.len);
 1564                 vap->iv_stats.is_rx_tooshort++;
 1565                 goto out;
 1566         }
 1567         /*
 1568          * Bit of a cheat here, we use a pointer for a 3-address
 1569          * frame format but don't reference fields past outside
 1570          * ieee80211_frame_min w/o first validating the data is
 1571          * present.
 1572         */
 1573         wh = mtod(m, struct ieee80211_frame *);
 1574 
 1575         if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) !=
 1576             IEEE80211_FC0_VERSION_0) {
 1577                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
 1578                     ni->ni_macaddr, NULL, "wrong version %x", wh->i_fc[0]);
 1579                 vap->iv_stats.is_rx_badversion++;
 1580                 goto err;
 1581         }
 1582         dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK;
 1583         type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK;
 1584         subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK;
 1585         if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) {
 1586                 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi);
 1587                 ni->ni_noise = nf;
 1588                 if (HAS_SEQ(type)) {
 1589                         uint8_t tid = ieee80211_gettid(wh);
 1590 
 1591                         if (IEEE80211_QOS_HAS_SEQ(wh) &&
 1592                             TID_TO_WME_AC(tid) >= WME_AC_VI)
 1593                                 ic->ic_wme.wme_hipri_traffic++;
 1594                         rxseq = le16toh(*(uint16_t *)wh->i_seq);
 1595                         if (! ieee80211_check_rxseq(ni, wh)) {
 1596                                 /* duplicate, discard */
 1597                                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
 1598                                     wh->i_addr1, "duplicate",
 1599                                     "seqno <%u,%u> fragno <%u,%u> tid %u",
 1600                                     rxseq >> IEEE80211_SEQ_SEQ_SHIFT,
 1601                                     ni->ni_rxseqs[tid] >>
 1602                                     IEEE80211_SEQ_SEQ_SHIFT,
 1603                                     rxseq & IEEE80211_SEQ_FRAG_MASK,
 1604                                     ni->ni_rxseqs[tid] &
 1605                                     IEEE80211_SEQ_FRAG_MASK,
 1606                                     tid);
 1607                                 vap->iv_stats.is_rx_dup++;
 1608                                 IEEE80211_NODE_STAT(ni, rx_dup);
 1609                                 goto out;
 1610                         }
 1611                         ni->ni_rxseqs[tid] = rxseq;
 1612                 }
 1613         }
 1614 #ifdef IEEE80211_DEBUG
 1615         /*
 1616          * It's easier, but too expensive, to simulate different mesh
 1617          * topologies by consulting the ACL policy very early, so do this
 1618          * only under DEBUG.
 1619          *
 1620          * NB: this check is also done upon peering link initiation.
 1621          */
 1622         if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) {
 1623                 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL,
 1624                     wh, NULL, "%s", "disallowed by ACL");
 1625                 vap->iv_stats.is_rx_acl++;
 1626                 goto out;
 1627         }
 1628 #endif
 1629         switch (type) {
 1630         case IEEE80211_FC0_TYPE_DATA:
 1631                 if (ni == vap->iv_bss)
 1632                         goto out;
 1633                 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) {
 1634                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
 1635                             ni->ni_macaddr, NULL,
 1636                             "peer link not yet established (%d)",
 1637                             ni->ni_mlstate);
 1638                         vap->iv_stats.is_mesh_nolink++;
 1639                         goto out;
 1640                 }
 1641                 if (dir != IEEE80211_FC1_DIR_FROMDS &&
 1642                     dir != IEEE80211_FC1_DIR_DSTODS) {
 1643                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
 1644                             wh, "data", "incorrect dir 0x%x", dir);
 1645                         vap->iv_stats.is_rx_wrongdir++;
 1646                         goto err;
 1647                 }
 1648 
 1649                 /* All Mesh data frames are QoS subtype */
 1650                 if (!HAS_SEQ(type)) {
 1651                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
 1652                             wh, "data", "incorrect subtype 0x%x", subtype);
 1653                         vap->iv_stats.is_rx_badsubtype++;
 1654                         goto err;
 1655                 }
 1656 
 1657                 /*
 1658                  * Next up, any fragmentation.
 1659                  * XXX: we defrag before we even try to forward,
 1660                  * Mesh Control field is not present in sub-sequent
 1661                  * fragmented frames. This is in contrast to Draft 4.0.
 1662                  */
 1663                 hdrspace = ieee80211_hdrspace(ic, wh);
 1664                 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
 1665                         m = ieee80211_defrag(ni, m, hdrspace);
 1666                         if (m == NULL) {
 1667                                 /* Fragment dropped or frame not complete yet */
 1668                                 goto out;
 1669                         }
 1670                 }
 1671                 wh = mtod(m, struct ieee80211_frame *); /* NB: after defrag */
 1672 
 1673                 /*
 1674                  * Now we have a complete Mesh Data frame.
 1675                  */
 1676 
 1677                 /*
 1678                  * Only fromDStoDS data frames use 4 address qos frames
 1679                  * as specified in amendment. Otherwise addr4 is located
 1680                  * in the Mesh Control field and a 3 address qos frame
 1681                  * is used.
 1682                  */
 1683                 if (IEEE80211_IS_DSTODS(wh))
 1684                         *(uint16_t *)qos = *(uint16_t *)
 1685                             ((struct ieee80211_qosframe_addr4 *)wh)->i_qos;
 1686                 else
 1687                         *(uint16_t *)qos = *(uint16_t *)
 1688                             ((struct ieee80211_qosframe *)wh)->i_qos;
 1689 
 1690                 /*
 1691                  * NB: The mesh STA sets the Mesh Control Present
 1692                  * subfield to 1 in the Mesh Data frame containing
 1693                  * an unfragmented MSDU, an A-MSDU, or the first
 1694                  * fragment of an MSDU.
 1695                  * After defrag it should always be present.
 1696                  */
 1697                 if (!(qos[1] & IEEE80211_QOS_MC)) {
 1698                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
 1699                             ni->ni_macaddr, NULL,
 1700                             "%s", "Mesh control field not present");
 1701                         vap->iv_stats.is_rx_elem_missing++; /* XXX: kinda */
 1702                         goto err;
 1703                 }
 1704 
 1705                 /* pull up enough to get to the mesh control */
 1706                 if (m->m_len < hdrspace + sizeof(struct ieee80211_meshcntl) &&
 1707                     (m = m_pullup(m, hdrspace +
 1708                         sizeof(struct ieee80211_meshcntl))) == NULL) {
 1709                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
 1710                             ni->ni_macaddr, NULL,
 1711                             "data too short: expecting %u", hdrspace);
 1712                         vap->iv_stats.is_rx_tooshort++;
 1713                         goto out;               /* XXX */
 1714                 }
 1715                 /*
 1716                  * Now calculate the full extent of the headers. Note
 1717                  * mesh_decap will pull up anything we didn't get
 1718                  * above when it strips the 802.11 headers.
 1719                  */
 1720                 mc = (const struct ieee80211_meshcntl *)
 1721                     (mtod(m, const uint8_t *) + hdrspace);
 1722                 ae = mc->mc_flags & IEEE80211_MESH_AE_MASK;
 1723                 meshdrlen = sizeof(struct ieee80211_meshcntl) +
 1724                     ae * IEEE80211_ADDR_LEN;
 1725                 hdrspace += meshdrlen;
 1726 
 1727                 /* pull complete hdrspace = ieee80211_hdrspace + meshcontrol */
 1728                 if ((meshdrlen > sizeof(struct ieee80211_meshcntl)) &&
 1729                     (m->m_len < hdrspace) &&
 1730                     ((m = m_pullup(m, hdrspace)) == NULL)) {
 1731                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
 1732                             ni->ni_macaddr, NULL,
 1733                             "data too short: expecting %u", hdrspace);
 1734                         vap->iv_stats.is_rx_tooshort++;
 1735                         goto out;               /* XXX */
 1736                 }
 1737                 /* XXX: are we sure there is no reallocating after m_pullup? */
 1738 
 1739                 seq = LE_READ_4(mc->mc_seq);
 1740                 if (IEEE80211_IS_MULTICAST(wh->i_addr1))
 1741                         addr = wh->i_addr3;
 1742                 else if (ae == IEEE80211_MESH_AE_01)
 1743                         addr = MC01(mc)->mc_addr4;
 1744                 else
 1745                         addr = ((struct ieee80211_qosframe_addr4 *)wh)->i_addr4;
 1746                 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, addr)) {
 1747                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
 1748                             addr, "data", "%s", "not to me");
 1749                         vap->iv_stats.is_rx_wrongbss++; /* XXX kinda */
 1750                         goto out;
 1751                 }
 1752                 if (mesh_checkpseq(vap, addr, seq) != 0) {
 1753                         vap->iv_stats.is_rx_dup++;
 1754                         goto out;
 1755                 }
 1756 
 1757                 /* This code "routes" the frame to the right control path */
 1758                 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
 1759                         if (IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr3))
 1760                                 error =
 1761                                     mesh_recv_indiv_data_to_me(vap, m, wh, mc);
 1762                         else if (IEEE80211_IS_MULTICAST(wh->i_addr3))
 1763                                 error = mesh_recv_group_data(vap, m, wh, mc);
 1764                         else
 1765                                 error = mesh_recv_indiv_data_to_fwrd(vap, m,
 1766                                     wh, mc);
 1767                 } else
 1768                         error = mesh_recv_group_data(vap, m, wh, mc);
 1769                 if (error < 0)
 1770                         goto err;
 1771                 else if (error > 0)
 1772                         goto out;
 1773 
 1774                 if (ieee80211_radiotap_active_vap(vap))
 1775                         ieee80211_radiotap_rx(vap, m);
 1776                 need_tap = 0;
 1777 
 1778                 /*
 1779                  * Finally, strip the 802.11 header.
 1780                  */
 1781                 m = mesh_decap(vap, m, hdrspace, meshdrlen);
 1782                 if (m == NULL) {
 1783                         /* XXX mask bit to check for both */
 1784                         /* don't count Null data frames as errors */
 1785                         if (subtype == IEEE80211_FC0_SUBTYPE_NODATA ||
 1786                             subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL)
 1787                                 goto out;
 1788                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
 1789                             ni->ni_macaddr, "data", "%s", "decap error");
 1790                         vap->iv_stats.is_rx_decap++;
 1791                         IEEE80211_NODE_STAT(ni, rx_decap);
 1792                         goto err;
 1793                 }
 1794                 if (qos[0] & IEEE80211_QOS_AMSDU) {
 1795                         m = ieee80211_decap_amsdu(ni, m);
 1796                         if (m == NULL)
 1797                                 return IEEE80211_FC0_TYPE_DATA;
 1798                 }
 1799                 ieee80211_deliver_data(vap, ni, m);
 1800                 return type;
 1801         case IEEE80211_FC0_TYPE_MGT:
 1802                 vap->iv_stats.is_rx_mgmt++;
 1803                 IEEE80211_NODE_STAT(ni, rx_mgmt);
 1804                 if (dir != IEEE80211_FC1_DIR_NODS) {
 1805                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
 1806                             wh, "mgt", "incorrect dir 0x%x", dir);
 1807                         vap->iv_stats.is_rx_wrongdir++;
 1808                         goto err;
 1809                 }
 1810                 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) {
 1811                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
 1812                             ni->ni_macaddr, "mgt", "too short: len %u",
 1813                             m->m_pkthdr.len);
 1814                         vap->iv_stats.is_rx_tooshort++;
 1815                         goto out;
 1816                 }
 1817 #ifdef IEEE80211_DEBUG
 1818                 if ((ieee80211_msg_debug(vap) && 
 1819                     (vap->iv_ic->ic_flags & IEEE80211_F_SCAN)) ||
 1820                     ieee80211_msg_dumppkts(vap)) {
 1821                         if_printf(ifp, "received %s from %s rssi %d\n",
 1822                             ieee80211_mgt_subtype_name[subtype >>
 1823                             IEEE80211_FC0_SUBTYPE_SHIFT],
 1824                             ether_sprintf(wh->i_addr2), rssi);
 1825                 }
 1826 #endif
 1827                 if (wh->i_fc[1] & IEEE80211_FC1_WEP) {
 1828                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
 1829                             wh, NULL, "%s", "WEP set but not permitted");
 1830                         vap->iv_stats.is_rx_mgtdiscard++; /* XXX */
 1831                         goto out;
 1832                 }
 1833                 vap->iv_recv_mgmt(ni, m, subtype, rssi, nf);
 1834                 goto out;
 1835         case IEEE80211_FC0_TYPE_CTL:
 1836                 vap->iv_stats.is_rx_ctl++;
 1837                 IEEE80211_NODE_STAT(ni, rx_ctrl);
 1838                 goto out;
 1839         default:
 1840                 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
 1841                     wh, "bad", "frame type 0x%x", type);
 1842                 /* should not come here */
 1843                 break;
 1844         }
 1845 err:
 1846         ifp->if_ierrors++;
 1847 out:
 1848         if (m != NULL) {
 1849                 if (need_tap && ieee80211_radiotap_active_vap(vap))
 1850                         ieee80211_radiotap_rx(vap, m);
 1851                 m_freem(m);
 1852         }
 1853         return type;
 1854 #undef  HAS_SEQ
 1855 #undef  MC01
 1856 #undef  MC10
 1857 }
 1858 
 1859 static void
 1860 mesh_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, int subtype,
 1861     int rssi, int nf)
 1862 {
 1863         struct ieee80211vap *vap = ni->ni_vap;
 1864         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 1865         struct ieee80211com *ic = ni->ni_ic;
 1866         struct ieee80211_frame *wh;
 1867         struct ieee80211_mesh_route *rt;
 1868         uint8_t *frm, *efrm;
 1869 
 1870         wh = mtod(m0, struct ieee80211_frame *);
 1871         frm = (uint8_t *)&wh[1];
 1872         efrm = mtod(m0, uint8_t *) + m0->m_len;
 1873         switch (subtype) {
 1874         case IEEE80211_FC0_SUBTYPE_PROBE_RESP:
 1875         case IEEE80211_FC0_SUBTYPE_BEACON:
 1876         {
 1877                 struct ieee80211_scanparams scan;
 1878                 /*
 1879                  * We process beacon/probe response
 1880                  * frames to discover neighbors.
 1881                  */
 1882                 if (ieee80211_parse_beacon(ni, m0, &scan) != 0)
 1883                         return;
 1884                 /*
 1885                  * Count frame now that we know it's to be processed.
 1886                  */
 1887                 if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) {
 1888                         vap->iv_stats.is_rx_beacon++;   /* XXX remove */
 1889                         IEEE80211_NODE_STAT(ni, rx_beacons);
 1890                 } else
 1891                         IEEE80211_NODE_STAT(ni, rx_proberesp);
 1892                 /*
 1893                  * If scanning, just pass information to the scan module.
 1894                  */
 1895                 if (ic->ic_flags & IEEE80211_F_SCAN) {
 1896                         if (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN) {
 1897                                 /*
 1898                                  * Actively scanning a channel marked passive;
 1899                                  * send a probe request now that we know there
 1900                                  * is 802.11 traffic present.
 1901                                  *
 1902                                  * XXX check if the beacon we recv'd gives
 1903                                  * us what we need and suppress the probe req
 1904                                  */
 1905                                 ieee80211_probe_curchan(vap, 1);
 1906                                 ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN;
 1907                         }
 1908                         ieee80211_add_scan(vap, &scan, wh,
 1909                             subtype, rssi, nf);
 1910                         return;
 1911                 }
 1912 
 1913                 /* The rest of this code assumes we are running */
 1914                 if (vap->iv_state != IEEE80211_S_RUN)
 1915                         return;
 1916                 /*
 1917                  * Ignore non-mesh STAs.
 1918                  */
 1919                 if ((scan.capinfo &
 1920                      (IEEE80211_CAPINFO_ESS|IEEE80211_CAPINFO_IBSS)) ||
 1921                     scan.meshid == NULL || scan.meshconf == NULL) {
 1922                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
 1923                             wh, "beacon", "%s", "not a mesh sta");
 1924                         vap->iv_stats.is_mesh_wrongmesh++;
 1925                         return;
 1926                 }
 1927                 /*
 1928                  * Ignore STAs for other mesh networks.
 1929                  */
 1930                 if (memcmp(scan.meshid+2, ms->ms_id, ms->ms_idlen) != 0 ||
 1931                     mesh_verify_meshconf(vap, scan.meshconf)) {
 1932                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
 1933                             wh, "beacon", "%s", "not for our mesh");
 1934                         vap->iv_stats.is_mesh_wrongmesh++;
 1935                         return;
 1936                 }
 1937                 /*
 1938                  * Peer only based on the current ACL policy.
 1939                  */
 1940                 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) {
 1941                         IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL,
 1942                             wh, NULL, "%s", "disallowed by ACL");
 1943                         vap->iv_stats.is_rx_acl++;
 1944                         return;
 1945                 }
 1946                 /*
 1947                  * Do neighbor discovery.
 1948                  */
 1949                 if (!IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_macaddr)) {
 1950                         /*
 1951                          * Create a new entry in the neighbor table.
 1952                          */
 1953                         ni = ieee80211_add_neighbor(vap, wh, &scan);
 1954                 }
 1955                 /*
 1956                  * Automatically peer with discovered nodes if possible.
 1957                  */
 1958                 if (ni != vap->iv_bss &&
 1959                     (ms->ms_flags & IEEE80211_MESHFLAGS_AP)) {
 1960                         switch (ni->ni_mlstate) {
 1961                         case IEEE80211_NODE_MESH_IDLE:
 1962                         {
 1963                                 uint16_t args[1];
 1964 
 1965                                 /* Wait for backoff callout to reset counter */
 1966                                 if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding)
 1967                                         return;
 1968 
 1969                                 ni->ni_mlpid = mesh_generateid(vap);
 1970                                 if (ni->ni_mlpid == 0)
 1971                                         return;
 1972                                 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENSNT);
 1973                                 args[0] = ni->ni_mlpid;
 1974                                 ieee80211_send_action(ni,
 1975                                 IEEE80211_ACTION_CAT_SELF_PROT,
 1976                                 IEEE80211_ACTION_MESHPEERING_OPEN, args);
 1977                                 ni->ni_mlrcnt = 0;
 1978                                 mesh_peer_timeout_setup(ni);
 1979                                 break;
 1980                         }
 1981                         case IEEE80211_NODE_MESH_ESTABLISHED:
 1982                         {
 1983                                 /*
 1984                                  * Valid beacon from a peer mesh STA
 1985                                  * bump TA lifetime
 1986                                  */
 1987                                 rt = ieee80211_mesh_rt_find(vap, wh->i_addr2);
 1988                                 if(rt != NULL) {
 1989                                         ieee80211_mesh_rt_update(rt,
 1990                                             ticks_to_msecs(
 1991                                             ms->ms_ppath->mpp_inact));
 1992                                 }
 1993                                 break;
 1994                         }
 1995                         default:
 1996                                 break; /* ignore */
 1997                         }
 1998                 }
 1999                 break;
 2000         }
 2001         case IEEE80211_FC0_SUBTYPE_PROBE_REQ:
 2002         {
 2003                 uint8_t *ssid, *meshid, *rates, *xrates;
 2004                 uint8_t *sfrm;
 2005 
 2006                 if (vap->iv_state != IEEE80211_S_RUN) {
 2007                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
 2008                             wh, NULL, "wrong state %s",
 2009                             ieee80211_state_name[vap->iv_state]);
 2010                         vap->iv_stats.is_rx_mgtdiscard++;
 2011                         return;
 2012                 }
 2013                 if (IEEE80211_IS_MULTICAST(wh->i_addr2)) {
 2014                         /* frame must be directed */
 2015                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
 2016                             wh, NULL, "%s", "not unicast");
 2017                         vap->iv_stats.is_rx_mgtdiscard++;       /* XXX stat */
 2018                         return;
 2019                 }
 2020                 /*
 2021                  * prreq frame format
 2022                  *      [tlv] ssid
 2023                  *      [tlv] supported rates
 2024                  *      [tlv] extended supported rates
 2025                  *      [tlv] mesh id
 2026                  */
 2027                 ssid = meshid = rates = xrates = NULL;
 2028                 sfrm = frm;
 2029                 while (efrm - frm > 1) {
 2030                         IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return);
 2031                         switch (*frm) {
 2032                         case IEEE80211_ELEMID_SSID:
 2033                                 ssid = frm;
 2034                                 break;
 2035                         case IEEE80211_ELEMID_RATES:
 2036                                 rates = frm;
 2037                                 break;
 2038                         case IEEE80211_ELEMID_XRATES:
 2039                                 xrates = frm;
 2040                                 break;
 2041                         case IEEE80211_ELEMID_MESHID:
 2042                                 meshid = frm;
 2043                                 break;
 2044                         }
 2045                         frm += frm[1] + 2;
 2046                 }
 2047                 IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return);
 2048                 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return);
 2049                 if (xrates != NULL)
 2050                         IEEE80211_VERIFY_ELEMENT(xrates,
 2051                             IEEE80211_RATE_MAXSIZE - rates[1], return);
 2052                 if (meshid != NULL) {
 2053                         IEEE80211_VERIFY_ELEMENT(meshid,
 2054                             IEEE80211_MESHID_LEN, return);
 2055                         /* NB: meshid, not ssid */
 2056                         IEEE80211_VERIFY_SSID(vap->iv_bss, meshid, return);
 2057                 }
 2058 
 2059                 /* XXX find a better class or define it's own */
 2060                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_INPUT, wh->i_addr2,
 2061                     "%s", "recv probe req");
 2062                 /*
 2063                  * Some legacy 11b clients cannot hack a complete
 2064                  * probe response frame.  When the request includes
 2065                  * only a bare-bones rate set, communicate this to
 2066                  * the transmit side.
 2067                  */
 2068                 ieee80211_send_proberesp(vap, wh->i_addr2, 0);
 2069                 break;
 2070         }
 2071 
 2072         case IEEE80211_FC0_SUBTYPE_ACTION:
 2073         case IEEE80211_FC0_SUBTYPE_ACTION_NOACK:
 2074                 if (ni == vap->iv_bss) {
 2075                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
 2076                             wh, NULL, "%s", "unknown node");
 2077                         vap->iv_stats.is_rx_mgtdiscard++;
 2078                 } else if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) &&
 2079                     !IEEE80211_IS_MULTICAST(wh->i_addr1)) {
 2080                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
 2081                             wh, NULL, "%s", "not for us");
 2082                         vap->iv_stats.is_rx_mgtdiscard++;
 2083                 } else if (vap->iv_state != IEEE80211_S_RUN) {
 2084                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
 2085                             wh, NULL, "wrong state %s",
 2086                             ieee80211_state_name[vap->iv_state]);
 2087                         vap->iv_stats.is_rx_mgtdiscard++;
 2088                 } else {
 2089                         if (ieee80211_parse_action(ni, m0) == 0)
 2090                                 (void)ic->ic_recv_action(ni, wh, frm, efrm);
 2091                 }
 2092                 break;
 2093 
 2094         case IEEE80211_FC0_SUBTYPE_ASSOC_REQ:
 2095         case IEEE80211_FC0_SUBTYPE_ASSOC_RESP:
 2096         case IEEE80211_FC0_SUBTYPE_REASSOC_REQ:
 2097         case IEEE80211_FC0_SUBTYPE_REASSOC_RESP:
 2098         case IEEE80211_FC0_SUBTYPE_ATIM:
 2099         case IEEE80211_FC0_SUBTYPE_DISASSOC:
 2100         case IEEE80211_FC0_SUBTYPE_AUTH:
 2101         case IEEE80211_FC0_SUBTYPE_DEAUTH:
 2102                 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
 2103                     wh, NULL, "%s", "not handled");
 2104                 vap->iv_stats.is_rx_mgtdiscard++;
 2105                 break;
 2106 
 2107         default:
 2108                 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
 2109                     wh, "mgt", "subtype 0x%x not handled", subtype);
 2110                 vap->iv_stats.is_rx_badsubtype++;
 2111                 break;
 2112         }
 2113 }
 2114 
 2115 static void
 2116 mesh_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype)
 2117 {
 2118 
 2119         switch (subtype) {
 2120         case IEEE80211_FC0_SUBTYPE_BAR:
 2121                 ieee80211_recv_bar(ni, m);
 2122                 break;
 2123         }
 2124 }
 2125 
 2126 /*
 2127  * Parse meshpeering action ie's for MPM frames
 2128  */
 2129 static const struct ieee80211_meshpeer_ie *
 2130 mesh_parse_meshpeering_action(struct ieee80211_node *ni,
 2131         const struct ieee80211_frame *wh,       /* XXX for VERIFY_LENGTH */
 2132         const uint8_t *frm, const uint8_t *efrm,
 2133         struct ieee80211_meshpeer_ie *mp, uint8_t subtype)
 2134 {
 2135         struct ieee80211vap *vap = ni->ni_vap;
 2136         const struct ieee80211_meshpeer_ie *mpie;
 2137         uint16_t args[3];
 2138         const uint8_t *meshid, *meshconf, *meshpeer;
 2139         uint8_t sendclose = 0; /* 1 = MPM frame rejected, close will be sent */
 2140 
 2141         meshid = meshconf = meshpeer = NULL;
 2142         while (efrm - frm > 1) {
 2143                 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return NULL);
 2144                 switch (*frm) {
 2145                 case IEEE80211_ELEMID_MESHID:
 2146                         meshid = frm;
 2147                         break;
 2148                 case IEEE80211_ELEMID_MESHCONF:
 2149                         meshconf = frm;
 2150                         break;
 2151                 case IEEE80211_ELEMID_MESHPEER:
 2152                         meshpeer = frm;
 2153                         mpie = (const struct ieee80211_meshpeer_ie *) frm;
 2154                         memset(mp, 0, sizeof(*mp));
 2155                         mp->peer_len = mpie->peer_len;
 2156                         mp->peer_proto = LE_READ_2(&mpie->peer_proto);
 2157                         mp->peer_llinkid = LE_READ_2(&mpie->peer_llinkid);
 2158                         switch (subtype) {
 2159                         case IEEE80211_ACTION_MESHPEERING_CONFIRM:
 2160                                 mp->peer_linkid =
 2161                                     LE_READ_2(&mpie->peer_linkid);
 2162                                 break;
 2163                         case IEEE80211_ACTION_MESHPEERING_CLOSE:
 2164                                 /* NB: peer link ID is optional */
 2165                                 if (mpie->peer_len ==
 2166                                     (IEEE80211_MPM_BASE_SZ + 2)) {
 2167                                         mp->peer_linkid = 0;
 2168                                         mp->peer_rcode =
 2169                                             LE_READ_2(&mpie->peer_linkid);
 2170                                 } else {
 2171                                         mp->peer_linkid =
 2172                                             LE_READ_2(&mpie->peer_linkid);
 2173                                         mp->peer_rcode =
 2174                                             LE_READ_2(&mpie->peer_rcode);
 2175                                 }
 2176                                 break;
 2177                         }
 2178                         break;
 2179                 }
 2180                 frm += frm[1] + 2;
 2181         }
 2182 
 2183         /*
 2184          * Verify the contents of the frame.
 2185          * If it fails validation, close the peer link.
 2186          */
 2187         if (mesh_verify_meshpeer(vap, subtype, (const uint8_t *)mp)) {
 2188                 sendclose = 1;
 2189                 IEEE80211_DISCARD(vap,
 2190                     IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
 2191                     wh, NULL, "%s", "MPM validation failed");
 2192         }
 2193 
 2194         /* If meshid is not the same reject any frames type. */
 2195         if (sendclose == 0 && mesh_verify_meshid(vap, meshid)) {
 2196                 sendclose = 1;
 2197                 IEEE80211_DISCARD(vap,
 2198                     IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
 2199                     wh, NULL, "%s", "not for our mesh");
 2200                 if (subtype == IEEE80211_ACTION_MESHPEERING_CLOSE) {
 2201                         /*
 2202                          * Standard not clear about this, if we dont ignore
 2203                          * there will be an endless loop between nodes sending
 2204                          * CLOSE frames between each other with wrong meshid.
 2205                          * Discard and timers will bring FSM to IDLE state.
 2206                          */
 2207                         return NULL;
 2208                 }
 2209         }
 2210         
 2211         /*
 2212          * Close frames are accepted if meshid is the same.
 2213          * Verify the other two types.
 2214          */
 2215         if (sendclose == 0 && subtype != IEEE80211_ACTION_MESHPEERING_CLOSE &&
 2216             mesh_verify_meshconf(vap, meshconf)) {
 2217                 sendclose = 1;
 2218                 IEEE80211_DISCARD(vap,
 2219                     IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
 2220                     wh, NULL, "%s", "configuration missmatch");
 2221         }
 2222 
 2223         if (sendclose) {
 2224                 vap->iv_stats.is_rx_mgtdiscard++;
 2225                 switch (ni->ni_mlstate) {
 2226                 case IEEE80211_NODE_MESH_IDLE:
 2227                 case IEEE80211_NODE_MESH_ESTABLISHED:
 2228                 case IEEE80211_NODE_MESH_HOLDING:
 2229                         /* ignore */
 2230                         break;
 2231                 case IEEE80211_NODE_MESH_OPENSNT:
 2232                 case IEEE80211_NODE_MESH_OPENRCV:
 2233                 case IEEE80211_NODE_MESH_CONFIRMRCV:
 2234                         args[0] = ni->ni_mlpid;
 2235                         args[1] = ni->ni_mllid;
 2236                         /* Reason codes for rejection */
 2237                         switch (subtype) {
 2238                         case IEEE80211_ACTION_MESHPEERING_OPEN:
 2239                                 args[2] = IEEE80211_REASON_MESH_CPVIOLATION;
 2240                                 break;
 2241                         case IEEE80211_ACTION_MESHPEERING_CONFIRM:
 2242                                 args[2] = IEEE80211_REASON_MESH_INCONS_PARAMS;
 2243                                 break;
 2244                         }
 2245                         ieee80211_send_action(ni,
 2246                             IEEE80211_ACTION_CAT_SELF_PROT,
 2247                             IEEE80211_ACTION_MESHPEERING_CLOSE,
 2248                             args);
 2249                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
 2250                         mesh_peer_timeout_setup(ni);
 2251                         break;
 2252                 }
 2253                 return NULL;
 2254         }
 2255         
 2256         return (const struct ieee80211_meshpeer_ie *) mp;
 2257 }
 2258 
 2259 static int
 2260 mesh_recv_action_meshpeering_open(struct ieee80211_node *ni,
 2261         const struct ieee80211_frame *wh,
 2262         const uint8_t *frm, const uint8_t *efrm)
 2263 {
 2264         struct ieee80211vap *vap = ni->ni_vap;
 2265         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 2266         struct ieee80211_meshpeer_ie ie;
 2267         const struct ieee80211_meshpeer_ie *meshpeer;
 2268         uint16_t args[3];
 2269 
 2270         /* +2+2 for action + code + capabilites */
 2271         meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2, efrm, &ie,
 2272             IEEE80211_ACTION_MESHPEERING_OPEN);
 2273         if (meshpeer == NULL) {
 2274                 return 0;
 2275         }
 2276 
 2277         /* XXX move up */
 2278         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
 2279             "recv PEER OPEN, lid 0x%x", meshpeer->peer_llinkid);
 2280 
 2281         switch (ni->ni_mlstate) {
 2282         case IEEE80211_NODE_MESH_IDLE:
 2283                 /* Reject open request if reached our maximum neighbor count */
 2284                 if (ms->ms_neighbors >= IEEE80211_MESH_MAX_NEIGHBORS) {
 2285                         args[0] = meshpeer->peer_llinkid;
 2286                         args[1] = 0;
 2287                         args[2] = IEEE80211_REASON_MESH_MAX_PEERS;
 2288                         ieee80211_send_action(ni,
 2289                             IEEE80211_ACTION_CAT_SELF_PROT,
 2290                             IEEE80211_ACTION_MESHPEERING_CLOSE,
 2291                             args);
 2292                         /* stay in IDLE state */
 2293                         return (0);
 2294                 }
 2295                 /* Open frame accepted */
 2296                 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV);
 2297                 ni->ni_mllid = meshpeer->peer_llinkid;
 2298                 ni->ni_mlpid = mesh_generateid(vap);
 2299                 if (ni->ni_mlpid == 0)
 2300                         return 0;               /* XXX */
 2301                 args[0] = ni->ni_mlpid;
 2302                 /* Announce we're open too... */
 2303                 ieee80211_send_action(ni,
 2304                     IEEE80211_ACTION_CAT_SELF_PROT,
 2305                     IEEE80211_ACTION_MESHPEERING_OPEN, args);
 2306                 /* ...and confirm the link. */
 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                 mesh_peer_timeout_setup(ni);
 2314                 break;
 2315         case IEEE80211_NODE_MESH_OPENRCV:
 2316                 /* Wrong Link ID */
 2317                 if (ni->ni_mllid != meshpeer->peer_llinkid) {
 2318                         args[0] = ni->ni_mllid;
 2319                         args[1] = ni->ni_mlpid;
 2320                         args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
 2321                         ieee80211_send_action(ni,
 2322                             IEEE80211_ACTION_CAT_SELF_PROT,
 2323                             IEEE80211_ACTION_MESHPEERING_CLOSE,
 2324                             args);
 2325                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
 2326                         mesh_peer_timeout_setup(ni);
 2327                         break;
 2328                 }
 2329                 /* Duplicate open, confirm again. */
 2330                 args[0] = ni->ni_mlpid;
 2331                 args[1] = ni->ni_mllid;
 2332                 ieee80211_send_action(ni,
 2333                     IEEE80211_ACTION_CAT_SELF_PROT,
 2334                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
 2335                     args);
 2336                 break;
 2337         case IEEE80211_NODE_MESH_OPENSNT:
 2338                 ni->ni_mllid = meshpeer->peer_llinkid;
 2339                 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV);
 2340                 args[0] = ni->ni_mlpid;
 2341                 args[1] = ni->ni_mllid;
 2342                 ieee80211_send_action(ni,
 2343                     IEEE80211_ACTION_CAT_SELF_PROT,
 2344                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
 2345                     args);
 2346                 /* NB: don't setup/clear any timeout */
 2347                 break;
 2348         case IEEE80211_NODE_MESH_CONFIRMRCV:
 2349                 if (ni->ni_mlpid != meshpeer->peer_linkid ||
 2350                     ni->ni_mllid != meshpeer->peer_llinkid) {
 2351                         args[0] = ni->ni_mlpid;
 2352                         args[1] = ni->ni_mllid;
 2353                         args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
 2354                         ieee80211_send_action(ni,
 2355                             IEEE80211_ACTION_CAT_SELF_PROT,
 2356                             IEEE80211_ACTION_MESHPEERING_CLOSE,
 2357                             args);
 2358                         mesh_linkchange(ni,
 2359                             IEEE80211_NODE_MESH_HOLDING);
 2360                         mesh_peer_timeout_setup(ni);
 2361                         break;
 2362                 }
 2363                 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED);
 2364                 ni->ni_mllid = meshpeer->peer_llinkid;
 2365                 args[0] = ni->ni_mlpid;
 2366                 args[1] = ni->ni_mllid;
 2367                 ieee80211_send_action(ni,
 2368                     IEEE80211_ACTION_CAT_SELF_PROT,
 2369                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
 2370                     args);
 2371                 mesh_peer_timeout_stop(ni);
 2372                 break;
 2373         case IEEE80211_NODE_MESH_ESTABLISHED:
 2374                 if (ni->ni_mllid != meshpeer->peer_llinkid) {
 2375                         args[0] = ni->ni_mllid;
 2376                         args[1] = ni->ni_mlpid;
 2377                         args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
 2378                         ieee80211_send_action(ni,
 2379                             IEEE80211_ACTION_CAT_SELF_PROT,
 2380                             IEEE80211_ACTION_MESHPEERING_CLOSE,
 2381                             args);
 2382                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
 2383                         mesh_peer_timeout_setup(ni);
 2384                         break;
 2385                 }
 2386                 args[0] = ni->ni_mlpid;
 2387                 args[1] = ni->ni_mllid;
 2388                 ieee80211_send_action(ni,
 2389                     IEEE80211_ACTION_CAT_SELF_PROT,
 2390                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
 2391                     args);
 2392                 break;
 2393         case IEEE80211_NODE_MESH_HOLDING:
 2394                 args[0] = ni->ni_mlpid;
 2395                 args[1] = meshpeer->peer_llinkid;
 2396                 /* Standard not clear about what the reaason code should be */
 2397                 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
 2398                 ieee80211_send_action(ni,
 2399                     IEEE80211_ACTION_CAT_SELF_PROT,
 2400                     IEEE80211_ACTION_MESHPEERING_CLOSE,
 2401                     args);
 2402                 break;
 2403         }
 2404         return 0;
 2405 }
 2406 
 2407 static int
 2408 mesh_recv_action_meshpeering_confirm(struct ieee80211_node *ni,
 2409         const struct ieee80211_frame *wh,
 2410         const uint8_t *frm, const uint8_t *efrm)
 2411 {
 2412         struct ieee80211vap *vap = ni->ni_vap;
 2413         struct ieee80211_meshpeer_ie ie;
 2414         const struct ieee80211_meshpeer_ie *meshpeer;
 2415         uint16_t args[3];
 2416 
 2417         /* +2+2+2+2 for action + code + capabilites + status code + AID */
 2418         meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2+2+2, efrm, &ie,
 2419             IEEE80211_ACTION_MESHPEERING_CONFIRM);
 2420         if (meshpeer == NULL) {
 2421                 return 0;
 2422         }
 2423 
 2424         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
 2425             "recv PEER CONFIRM, local id 0x%x, peer id 0x%x",
 2426             meshpeer->peer_llinkid, meshpeer->peer_linkid);
 2427 
 2428         switch (ni->ni_mlstate) {
 2429         case IEEE80211_NODE_MESH_OPENRCV:
 2430                 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED);
 2431                 mesh_peer_timeout_stop(ni);
 2432                 break;
 2433         case IEEE80211_NODE_MESH_OPENSNT:
 2434                 mesh_linkchange(ni, IEEE80211_NODE_MESH_CONFIRMRCV);
 2435                 mesh_peer_timeout_setup(ni);
 2436                 break;
 2437         case IEEE80211_NODE_MESH_HOLDING:
 2438                 args[0] = ni->ni_mlpid;
 2439                 args[1] = meshpeer->peer_llinkid;
 2440                 /* Standard not clear about what the reaason code should be */
 2441                 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
 2442                 ieee80211_send_action(ni,
 2443                     IEEE80211_ACTION_CAT_SELF_PROT,
 2444                     IEEE80211_ACTION_MESHPEERING_CLOSE,
 2445                     args);
 2446                 break;
 2447         case IEEE80211_NODE_MESH_CONFIRMRCV:
 2448                 if (ni->ni_mllid != meshpeer->peer_llinkid) {
 2449                         args[0] = ni->ni_mlpid;
 2450                         args[1] = ni->ni_mllid;
 2451                         args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
 2452                         ieee80211_send_action(ni,
 2453                             IEEE80211_ACTION_CAT_SELF_PROT,
 2454                             IEEE80211_ACTION_MESHPEERING_CLOSE,
 2455                             args);
 2456                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
 2457                         mesh_peer_timeout_setup(ni);
 2458                 }
 2459                 break;
 2460         default:
 2461                 IEEE80211_DISCARD(vap,
 2462                     IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
 2463                     wh, NULL, "received confirm in invalid state %d",
 2464                     ni->ni_mlstate);
 2465                 vap->iv_stats.is_rx_mgtdiscard++;
 2466                 break;
 2467         }
 2468         return 0;
 2469 }
 2470 
 2471 static int
 2472 mesh_recv_action_meshpeering_close(struct ieee80211_node *ni,
 2473         const struct ieee80211_frame *wh,
 2474         const uint8_t *frm, const uint8_t *efrm)
 2475 {
 2476         struct ieee80211_meshpeer_ie ie;
 2477         const struct ieee80211_meshpeer_ie *meshpeer;
 2478         uint16_t args[3];
 2479 
 2480         /* +2 for action + code */
 2481         meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2, efrm, &ie,
 2482             IEEE80211_ACTION_MESHPEERING_CLOSE);
 2483         if (meshpeer == NULL) {
 2484                 return 0;
 2485         }
 2486 
 2487         /*
 2488          * XXX: check reason code, for example we could receive
 2489          * IEEE80211_REASON_MESH_MAX_PEERS then we should not attempt
 2490          * to peer again.
 2491          */
 2492 
 2493         IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
 2494             ni, "%s", "recv PEER CLOSE");
 2495 
 2496         switch (ni->ni_mlstate) {
 2497         case IEEE80211_NODE_MESH_IDLE:
 2498                 /* ignore */
 2499                 break;
 2500         case IEEE80211_NODE_MESH_OPENRCV:
 2501         case IEEE80211_NODE_MESH_OPENSNT:
 2502         case IEEE80211_NODE_MESH_CONFIRMRCV:
 2503         case IEEE80211_NODE_MESH_ESTABLISHED:
 2504                 args[0] = ni->ni_mlpid;
 2505                 args[1] = ni->ni_mllid;
 2506                 args[2] = IEEE80211_REASON_MESH_CLOSE_RCVD;
 2507                 ieee80211_send_action(ni,
 2508                     IEEE80211_ACTION_CAT_SELF_PROT,
 2509                     IEEE80211_ACTION_MESHPEERING_CLOSE,
 2510                     args);
 2511                 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
 2512                 mesh_peer_timeout_setup(ni);
 2513                 break;
 2514         case IEEE80211_NODE_MESH_HOLDING:
 2515                 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE);
 2516                 mesh_peer_timeout_stop(ni);
 2517                 break;
 2518         }
 2519         return 0;
 2520 }
 2521 
 2522 /*
 2523  * Link Metric handling.
 2524  */
 2525 static int
 2526 mesh_recv_action_meshlmetric(struct ieee80211_node *ni,
 2527         const struct ieee80211_frame *wh,
 2528         const uint8_t *frm, const uint8_t *efrm)
 2529 {
 2530         const struct ieee80211_meshlmetric_ie *ie =
 2531             (const struct ieee80211_meshlmetric_ie *)
 2532             (frm+2); /* action + code */
 2533         struct ieee80211_meshlmetric_ie lm_rep;
 2534         
 2535         if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) {
 2536                 lm_rep.lm_flags = 0;
 2537                 lm_rep.lm_metric = mesh_airtime_calc(ni);
 2538                 ieee80211_send_action(ni,
 2539                     IEEE80211_ACTION_CAT_MESH,
 2540                     IEEE80211_ACTION_MESH_LMETRIC,
 2541                     &lm_rep);
 2542         }
 2543         /* XXX: else do nothing for now */
 2544         return 0;
 2545 }
 2546 
 2547 /*
 2548  * Parse meshgate action ie's for GANN frames.
 2549  * Returns -1 if parsing fails, otherwise 0.
 2550  */
 2551 static int
 2552 mesh_parse_meshgate_action(struct ieee80211_node *ni,
 2553     const struct ieee80211_frame *wh,   /* XXX for VERIFY_LENGTH */
 2554     struct ieee80211_meshgann_ie *ie, const uint8_t *frm, const uint8_t *efrm)
 2555 {
 2556         struct ieee80211vap *vap = ni->ni_vap;
 2557         const struct ieee80211_meshgann_ie *gannie;
 2558 
 2559         while (efrm - frm > 1) {
 2560                 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return -1);
 2561                 switch (*frm) {
 2562                 case IEEE80211_ELEMID_MESHGANN:
 2563                         gannie = (const struct ieee80211_meshgann_ie *) frm;
 2564                         memset(ie, 0, sizeof(*ie));
 2565                         ie->gann_ie = gannie->gann_ie;
 2566                         ie->gann_len = gannie->gann_len;
 2567                         ie->gann_flags = gannie->gann_flags;
 2568                         ie->gann_hopcount = gannie->gann_hopcount;
 2569                         ie->gann_ttl = gannie->gann_ttl;
 2570                         IEEE80211_ADDR_COPY(ie->gann_addr, gannie->gann_addr);
 2571                         ie->gann_seq = LE_READ_4(&gannie->gann_seq);
 2572                         ie->gann_interval = LE_READ_2(&gannie->gann_interval);
 2573                         break;
 2574                 }
 2575                 frm += frm[1] + 2;
 2576         }
 2577 
 2578         return 0;
 2579 }
 2580 
 2581 /*
 2582  * Mesh Gate Announcement handling.
 2583  */
 2584 static int
 2585 mesh_recv_action_meshgate(struct ieee80211_node *ni,
 2586         const struct ieee80211_frame *wh,
 2587         const uint8_t *frm, const uint8_t *efrm)
 2588 {
 2589         struct ieee80211vap *vap = ni->ni_vap;
 2590         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 2591         struct ieee80211_mesh_gate_route *gr, *next;
 2592         struct ieee80211_mesh_route *rt_gate;
 2593         struct ieee80211_meshgann_ie pgann;
 2594         struct ieee80211_meshgann_ie ie;
 2595         int found = 0;
 2596 
 2597         /* +2 for action + code */
 2598         if (mesh_parse_meshgate_action(ni, wh, &ie, frm+2, efrm) != 0) {
 2599                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
 2600                     ni->ni_macaddr, NULL, "%s",
 2601                     "GANN parsing failed");
 2602                 vap->iv_stats.is_rx_mgtdiscard++;
 2603                 return (0);
 2604         }
 2605 
 2606         if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ie.gann_addr))
 2607                 return 0;
 2608 
 2609         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ni->ni_macaddr,
 2610             "received GANN, meshgate: %6D (seq %u)", ie.gann_addr, ":",
 2611             ie.gann_seq);
 2612 
 2613         if (ms == NULL)
 2614                 return (0);
 2615         MESH_RT_LOCK(ms);
 2616         TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) {
 2617                 if (!IEEE80211_ADDR_EQ(gr->gr_addr, ie.gann_addr))
 2618                         continue;
 2619                 if (ie.gann_seq <= gr->gr_lastseq) {
 2620                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
 2621                             ni->ni_macaddr, NULL,
 2622                             "GANN old seqno %u <= %u",
 2623                             ie.gann_seq, gr->gr_lastseq);
 2624                         MESH_RT_UNLOCK(ms);
 2625                         return (0);
 2626                 }
 2627                 /* corresponding mesh gate found & GANN accepted */
 2628                 found = 1;
 2629                 break;
 2630 
 2631         }
 2632         if (found == 0) {
 2633                 /* this GANN is from a new mesh Gate add it to known table. */
 2634                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie.gann_addr,
 2635                     "stored new GANN information, seq %u.", ie.gann_seq);
 2636                 gr = malloc(ALIGN(sizeof(struct ieee80211_mesh_gate_route)),
 2637                     M_80211_MESH_GT_RT, M_NOWAIT | M_ZERO);
 2638                 IEEE80211_ADDR_COPY(gr->gr_addr, ie.gann_addr);
 2639                 TAILQ_INSERT_TAIL(&ms->ms_known_gates, gr, gr_next);
 2640         }
 2641         gr->gr_lastseq = ie.gann_seq;
 2642 
 2643         /* check if we have a path to this gate */
 2644         rt_gate = mesh_rt_find_locked(ms, gr->gr_addr);
 2645         if (rt_gate != NULL &&
 2646             rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) {
 2647                 gr->gr_route = rt_gate;
 2648                 rt_gate->rt_flags |= IEEE80211_MESHRT_FLAGS_GATE;
 2649         }
 2650 
 2651         MESH_RT_UNLOCK(ms);
 2652 
 2653         /* popagate only if decremented ttl >= 1 && forwarding is enabled */
 2654         if ((ie.gann_ttl - 1) < 1 && !(ms->ms_flags & IEEE80211_MESHFLAGS_FWD))
 2655                 return 0;
 2656                 pgann.gann_flags = ie.gann_flags; /* Reserved */
 2657         pgann.gann_hopcount = ie.gann_hopcount + 1;
 2658         pgann.gann_ttl = ie.gann_ttl - 1;
 2659         IEEE80211_ADDR_COPY(pgann.gann_addr, ie.gann_addr);
 2660         pgann.gann_seq = ie.gann_seq;
 2661         pgann.gann_interval = ie.gann_interval;
 2662 
 2663         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie.gann_addr,
 2664             "%s", "propagate GANN");
 2665 
 2666         ieee80211_send_action(vap->iv_bss, IEEE80211_ACTION_CAT_MESH,
 2667             IEEE80211_ACTION_MESH_GANN, &pgann);
 2668 
 2669         return 0;
 2670 }
 2671 
 2672 static int
 2673 mesh_send_action(struct ieee80211_node *ni,
 2674     const uint8_t sa[IEEE80211_ADDR_LEN],
 2675     const uint8_t da[IEEE80211_ADDR_LEN],
 2676     struct mbuf *m)
 2677 {
 2678         struct ieee80211vap *vap = ni->ni_vap;
 2679         struct ieee80211com *ic = ni->ni_ic;
 2680         struct ieee80211_bpf_params params;
 2681         struct ieee80211_frame *wh;
 2682         int ret;
 2683 
 2684         KASSERT(ni != NULL, ("null node"));
 2685 
 2686         if (vap->iv_state == IEEE80211_S_CAC) {
 2687                 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT, ni,
 2688                     "block %s frame in CAC state", "Mesh action");
 2689                 vap->iv_stats.is_tx_badstate++;
 2690                 ieee80211_free_node(ni);
 2691                 m_freem(m);
 2692                 return EIO;             /* XXX */
 2693         }
 2694 
 2695         M_PREPEND(m, sizeof(struct ieee80211_frame), M_DONTWAIT);
 2696         if (m == NULL) {
 2697                 ieee80211_free_node(ni);
 2698                 return ENOMEM;
 2699         }
 2700 
 2701         IEEE80211_TX_LOCK(ic);
 2702         wh = mtod(m, struct ieee80211_frame *);
 2703         ieee80211_send_setup(ni, m,
 2704              IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_ACTION,
 2705              IEEE80211_NONQOS_TID, sa, da, sa);
 2706         m->m_flags |= M_ENCAP;          /* mark encapsulated */
 2707 
 2708         memset(&params, 0, sizeof(params));
 2709         params.ibp_pri = WME_AC_VO;
 2710         params.ibp_rate0 = ni->ni_txparms->mgmtrate;
 2711         if (IEEE80211_IS_MULTICAST(da))
 2712                 params.ibp_try0 = 1;
 2713         else
 2714                 params.ibp_try0 = ni->ni_txparms->maxretry;
 2715         params.ibp_power = ni->ni_txpower;
 2716 
 2717         IEEE80211_NODE_STAT(ni, tx_mgmt);
 2718 
 2719         ret = ieee80211_raw_output(vap, ni, m, &params);
 2720         IEEE80211_TX_UNLOCK(ic);
 2721         return (ret);
 2722 }
 2723 
 2724 #define ADDSHORT(frm, v) do {                   \
 2725         frm[0] = (v) & 0xff;                    \
 2726         frm[1] = (v) >> 8;                      \
 2727         frm += 2;                               \
 2728 } while (0)
 2729 #define ADDWORD(frm, v) do {                    \
 2730         frm[0] = (v) & 0xff;                    \
 2731         frm[1] = ((v) >> 8) & 0xff;             \
 2732         frm[2] = ((v) >> 16) & 0xff;            \
 2733         frm[3] = ((v) >> 24) & 0xff;            \
 2734         frm += 4;                               \
 2735 } while (0)
 2736 
 2737 static int
 2738 mesh_send_action_meshpeering_open(struct ieee80211_node *ni,
 2739         int category, int action, void *args0)
 2740 {
 2741         struct ieee80211vap *vap = ni->ni_vap;
 2742         struct ieee80211com *ic = ni->ni_ic;
 2743         uint16_t *args = args0;
 2744         const struct ieee80211_rateset *rs;
 2745         struct mbuf *m;
 2746         uint8_t *frm;
 2747 
 2748         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
 2749             "send PEER OPEN action: localid 0x%x", args[0]);
 2750 
 2751         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
 2752             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
 2753             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
 2754         ieee80211_ref_node(ni);
 2755 
 2756         m = ieee80211_getmgtframe(&frm,
 2757             ic->ic_headroom + sizeof(struct ieee80211_frame),
 2758             sizeof(uint16_t)    /* action+category */
 2759             + sizeof(uint16_t)  /* capabilites */
 2760             + 2 + IEEE80211_RATE_SIZE
 2761             + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
 2762             + 2 + IEEE80211_MESHID_LEN
 2763             + sizeof(struct ieee80211_meshconf_ie)
 2764             + sizeof(struct ieee80211_meshpeer_ie)
 2765         );
 2766         if (m != NULL) {
 2767                 /*
 2768                  * mesh peer open action frame format:
 2769                  *   [1] category
 2770                  *   [1] action
 2771                  *   [2] capabilities
 2772                  *   [tlv] rates
 2773                  *   [tlv] xrates
 2774                  *   [tlv] mesh id
 2775                  *   [tlv] mesh conf
 2776                  *   [tlv] mesh peer link mgmt
 2777                  */
 2778                 *frm++ = category;
 2779                 *frm++ = action;
 2780                 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan));
 2781                 rs = ieee80211_get_suprates(ic, ic->ic_curchan);
 2782                 frm = ieee80211_add_rates(frm, rs);
 2783                 frm = ieee80211_add_xrates(frm, rs);
 2784                 frm = ieee80211_add_meshid(frm, vap);
 2785                 frm = ieee80211_add_meshconf(frm, vap);
 2786                 frm = ieee80211_add_meshpeer(frm, IEEE80211_ACTION_MESHPEERING_OPEN,
 2787                     args[0], 0, 0);
 2788                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
 2789                 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m);
 2790         } else {
 2791                 vap->iv_stats.is_tx_nobuf++;
 2792                 ieee80211_free_node(ni);
 2793                 return ENOMEM;
 2794         }
 2795 }
 2796 
 2797 static int
 2798 mesh_send_action_meshpeering_confirm(struct ieee80211_node *ni,
 2799         int category, int action, void *args0)
 2800 {
 2801         struct ieee80211vap *vap = ni->ni_vap;
 2802         struct ieee80211com *ic = ni->ni_ic;
 2803         uint16_t *args = args0;
 2804         const struct ieee80211_rateset *rs;
 2805         struct mbuf *m;
 2806         uint8_t *frm;
 2807 
 2808         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
 2809             "send PEER CONFIRM action: localid 0x%x, peerid 0x%x",
 2810             args[0], args[1]);
 2811 
 2812         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
 2813             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
 2814             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
 2815         ieee80211_ref_node(ni);
 2816 
 2817         m = ieee80211_getmgtframe(&frm,
 2818             ic->ic_headroom + sizeof(struct ieee80211_frame),
 2819             sizeof(uint16_t)    /* action+category */
 2820             + sizeof(uint16_t)  /* capabilites */
 2821             + sizeof(uint16_t)  /* status code */
 2822             + sizeof(uint16_t)  /* AID */
 2823             + 2 + IEEE80211_RATE_SIZE
 2824             + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
 2825             + 2 + IEEE80211_MESHID_LEN
 2826             + sizeof(struct ieee80211_meshconf_ie)
 2827             + sizeof(struct ieee80211_meshpeer_ie)
 2828         );
 2829         if (m != NULL) {
 2830                 /*
 2831                  * mesh peer confirm action frame format:
 2832                  *   [1] category
 2833                  *   [1] action
 2834                  *   [2] capabilities
 2835                  *   [2] status code
 2836                  *   [2] association id (peer ID)
 2837                  *   [tlv] rates
 2838                  *   [tlv] xrates
 2839                  *   [tlv] mesh id
 2840                  *   [tlv] mesh conf
 2841                  *   [tlv] mesh peer link mgmt
 2842                  */
 2843                 *frm++ = category;
 2844                 *frm++ = action;
 2845                 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan));
 2846                 ADDSHORT(frm, 0);               /* status code */
 2847                 ADDSHORT(frm, args[1]);         /* AID */
 2848                 rs = ieee80211_get_suprates(ic, ic->ic_curchan);
 2849                 frm = ieee80211_add_rates(frm, rs);
 2850                 frm = ieee80211_add_xrates(frm, rs);
 2851                 frm = ieee80211_add_meshid(frm, vap);
 2852                 frm = ieee80211_add_meshconf(frm, vap);
 2853                 frm = ieee80211_add_meshpeer(frm,
 2854                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
 2855                     args[0], args[1], 0);
 2856                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
 2857                 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m);
 2858         } else {
 2859                 vap->iv_stats.is_tx_nobuf++;
 2860                 ieee80211_free_node(ni);
 2861                 return ENOMEM;
 2862         }
 2863 }
 2864 
 2865 static int
 2866 mesh_send_action_meshpeering_close(struct ieee80211_node *ni,
 2867         int category, int action, void *args0)
 2868 {
 2869         struct ieee80211vap *vap = ni->ni_vap;
 2870         struct ieee80211com *ic = ni->ni_ic;
 2871         uint16_t *args = args0;
 2872         struct mbuf *m;
 2873         uint8_t *frm;
 2874 
 2875         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
 2876             "send PEER CLOSE action: localid 0x%x, peerid 0x%x reason %d",
 2877             args[0], args[1], args[2]);
 2878 
 2879         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
 2880             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
 2881             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
 2882         ieee80211_ref_node(ni);
 2883 
 2884         m = ieee80211_getmgtframe(&frm,
 2885             ic->ic_headroom + sizeof(struct ieee80211_frame),
 2886             sizeof(uint16_t)    /* action+category */
 2887             + sizeof(uint16_t)  /* reason code */
 2888             + 2 + IEEE80211_MESHID_LEN
 2889             + sizeof(struct ieee80211_meshpeer_ie)
 2890         );
 2891         if (m != NULL) {
 2892                 /*
 2893                  * mesh peer close action frame format:
 2894                  *   [1] category
 2895                  *   [1] action
 2896                  *   [tlv] mesh id
 2897                  *   [tlv] mesh peer link mgmt
 2898                  */
 2899                 *frm++ = category;
 2900                 *frm++ = action;
 2901                 frm = ieee80211_add_meshid(frm, vap);
 2902                 frm = ieee80211_add_meshpeer(frm,
 2903                     IEEE80211_ACTION_MESHPEERING_CLOSE,
 2904                     args[0], args[1], args[2]);
 2905                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
 2906                 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m);
 2907         } else {
 2908                 vap->iv_stats.is_tx_nobuf++;
 2909                 ieee80211_free_node(ni);
 2910                 return ENOMEM;
 2911         }
 2912 }
 2913 
 2914 static int
 2915 mesh_send_action_meshlmetric(struct ieee80211_node *ni,
 2916         int category, int action, void *arg0)
 2917 {
 2918         struct ieee80211vap *vap = ni->ni_vap;
 2919         struct ieee80211com *ic = ni->ni_ic;
 2920         struct ieee80211_meshlmetric_ie *ie = arg0;
 2921         struct mbuf *m;
 2922         uint8_t *frm;
 2923 
 2924         if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) {
 2925                 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
 2926                     ni, "%s", "send LINK METRIC REQUEST action");
 2927         } else {
 2928                 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
 2929                     ni, "send LINK METRIC REPLY action: metric 0x%x",
 2930                     ie->lm_metric);
 2931         }
 2932         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
 2933             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
 2934             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
 2935         ieee80211_ref_node(ni);
 2936 
 2937         m = ieee80211_getmgtframe(&frm,
 2938             ic->ic_headroom + sizeof(struct ieee80211_frame),
 2939             sizeof(uint16_t) +  /* action+category */
 2940             sizeof(struct ieee80211_meshlmetric_ie)
 2941         );
 2942         if (m != NULL) {
 2943                 /*
 2944                  * mesh link metric
 2945                  *   [1] category
 2946                  *   [1] action
 2947                  *   [tlv] mesh link metric
 2948                  */
 2949                 *frm++ = category;
 2950                 *frm++ = action;
 2951                 frm = ieee80211_add_meshlmetric(frm,
 2952                     ie->lm_flags, ie->lm_metric);
 2953                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
 2954                 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m);
 2955         } else {
 2956                 vap->iv_stats.is_tx_nobuf++;
 2957                 ieee80211_free_node(ni);
 2958                 return ENOMEM;
 2959         }
 2960 }
 2961 
 2962 static int
 2963 mesh_send_action_meshgate(struct ieee80211_node *ni,
 2964         int category, int action, void *arg0)
 2965 {
 2966         struct ieee80211vap *vap = ni->ni_vap;
 2967         struct ieee80211com *ic = ni->ni_ic;
 2968         struct ieee80211_meshgann_ie *ie = arg0;
 2969         struct mbuf *m;
 2970         uint8_t *frm;
 2971 
 2972         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
 2973             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
 2974             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
 2975         ieee80211_ref_node(ni);
 2976 
 2977         m = ieee80211_getmgtframe(&frm,
 2978             ic->ic_headroom + sizeof(struct ieee80211_frame),
 2979             sizeof(uint16_t) +  /* action+category */
 2980             IEEE80211_MESHGANN_BASE_SZ
 2981         );
 2982         if (m != NULL) {
 2983                 /*
 2984                  * mesh link metric
 2985                  *   [1] category
 2986                  *   [1] action
 2987                  *   [tlv] mesh gate annoucement
 2988                  */
 2989                 *frm++ = category;
 2990                 *frm++ = action;
 2991                 frm = ieee80211_add_meshgate(frm, ie);
 2992                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
 2993                 return mesh_send_action(ni, vap->iv_myaddr, broadcastaddr, m);
 2994         } else {
 2995                 vap->iv_stats.is_tx_nobuf++;
 2996                 ieee80211_free_node(ni);
 2997                 return ENOMEM;
 2998         }
 2999 }
 3000 
 3001 static void
 3002 mesh_peer_timeout_setup(struct ieee80211_node *ni)
 3003 {
 3004         switch (ni->ni_mlstate) {
 3005         case IEEE80211_NODE_MESH_HOLDING:
 3006                 ni->ni_mltval = ieee80211_mesh_holdingtimeout;
 3007                 break;
 3008         case IEEE80211_NODE_MESH_CONFIRMRCV:
 3009                 ni->ni_mltval = ieee80211_mesh_confirmtimeout;
 3010                 break;
 3011         case IEEE80211_NODE_MESH_IDLE:
 3012                 ni->ni_mltval = 0;
 3013                 break;
 3014         default:
 3015                 ni->ni_mltval = ieee80211_mesh_retrytimeout;
 3016                 break;
 3017         }
 3018         if (ni->ni_mltval)
 3019                 callout_reset(&ni->ni_mltimer, ni->ni_mltval,
 3020                     mesh_peer_timeout_cb, ni);
 3021 }
 3022 
 3023 /*
 3024  * Same as above but backoffs timer statisically 50%.
 3025  */
 3026 static void
 3027 mesh_peer_timeout_backoff(struct ieee80211_node *ni)
 3028 {
 3029         uint32_t r;
 3030         
 3031         r = arc4random();
 3032         ni->ni_mltval += r % ni->ni_mltval;
 3033         callout_reset(&ni->ni_mltimer, ni->ni_mltval, mesh_peer_timeout_cb,
 3034             ni);
 3035 }
 3036 
 3037 static __inline void
 3038 mesh_peer_timeout_stop(struct ieee80211_node *ni)
 3039 {
 3040         callout_drain(&ni->ni_mltimer);
 3041 }
 3042 
 3043 static void
 3044 mesh_peer_backoff_cb(void *arg)
 3045 {
 3046         struct ieee80211_node *ni = (struct ieee80211_node *)arg;
 3047 
 3048         /* After backoff timeout, try to peer automatically again. */
 3049         ni->ni_mlhcnt = 0;
 3050 }
 3051 
 3052 /*
 3053  * Mesh Peer Link Management FSM timeout handling.
 3054  */
 3055 static void
 3056 mesh_peer_timeout_cb(void *arg)
 3057 {
 3058         struct ieee80211_node *ni = (struct ieee80211_node *)arg;
 3059         uint16_t args[3];
 3060 
 3061         IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_MESH,
 3062             ni, "mesh link timeout, state %d, retry counter %d",
 3063             ni->ni_mlstate, ni->ni_mlrcnt);
 3064         
 3065         switch (ni->ni_mlstate) {
 3066         case IEEE80211_NODE_MESH_IDLE:
 3067         case IEEE80211_NODE_MESH_ESTABLISHED:
 3068                 break;
 3069         case IEEE80211_NODE_MESH_OPENSNT:
 3070         case IEEE80211_NODE_MESH_OPENRCV:
 3071                 if (ni->ni_mlrcnt == ieee80211_mesh_maxretries) {
 3072                         args[0] = ni->ni_mlpid;
 3073                         args[2] = IEEE80211_REASON_MESH_MAX_RETRIES;
 3074                         ieee80211_send_action(ni,
 3075                             IEEE80211_ACTION_CAT_SELF_PROT,
 3076                             IEEE80211_ACTION_MESHPEERING_CLOSE, args);
 3077                         ni->ni_mlrcnt = 0;
 3078                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
 3079                         mesh_peer_timeout_setup(ni);
 3080                 } else {
 3081                         args[0] = ni->ni_mlpid;
 3082                         ieee80211_send_action(ni,
 3083                             IEEE80211_ACTION_CAT_SELF_PROT,
 3084                             IEEE80211_ACTION_MESHPEERING_OPEN, args);
 3085                         ni->ni_mlrcnt++;
 3086                         mesh_peer_timeout_backoff(ni);
 3087                 }
 3088                 break;
 3089         case IEEE80211_NODE_MESH_CONFIRMRCV:
 3090                 args[0] = ni->ni_mlpid;
 3091                 args[2] = IEEE80211_REASON_MESH_CONFIRM_TIMEOUT;
 3092                 ieee80211_send_action(ni,
 3093                     IEEE80211_ACTION_CAT_SELF_PROT,
 3094                     IEEE80211_ACTION_MESHPEERING_CLOSE, args);
 3095                 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
 3096                 mesh_peer_timeout_setup(ni);
 3097                 break;
 3098         case IEEE80211_NODE_MESH_HOLDING:
 3099                 ni->ni_mlhcnt++;
 3100                 if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding)
 3101                         callout_reset(&ni->ni_mlhtimer,
 3102                             ieee80211_mesh_backofftimeout,
 3103                             mesh_peer_backoff_cb, ni);
 3104                 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE);
 3105                 break;
 3106         }
 3107 }
 3108 
 3109 static int
 3110 mesh_verify_meshid(struct ieee80211vap *vap, const uint8_t *ie)
 3111 {
 3112         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 3113 
 3114         if (ie == NULL || ie[1] != ms->ms_idlen)
 3115                 return 1;
 3116         return memcmp(ms->ms_id, ie + 2, ms->ms_idlen);
 3117 }
 3118 
 3119 /*
 3120  * Check if we are using the same algorithms for this mesh.
 3121  */
 3122 static int
 3123 mesh_verify_meshconf(struct ieee80211vap *vap, const uint8_t *ie)
 3124 {
 3125         const struct ieee80211_meshconf_ie *meshconf =
 3126             (const struct ieee80211_meshconf_ie *) ie;
 3127         const struct ieee80211_mesh_state *ms = vap->iv_mesh;
 3128 
 3129         if (meshconf == NULL)
 3130                 return 1;
 3131         if (meshconf->conf_pselid != ms->ms_ppath->mpp_ie) {
 3132                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
 3133                     "unknown path selection algorithm: 0x%x\n",
 3134                     meshconf->conf_pselid);
 3135                 return 1;
 3136         }
 3137         if (meshconf->conf_pmetid != ms->ms_pmetric->mpm_ie) {
 3138                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
 3139                     "unknown path metric algorithm: 0x%x\n",
 3140                     meshconf->conf_pmetid);
 3141                 return 1;
 3142         }
 3143         if (meshconf->conf_ccid != 0) {
 3144                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
 3145                     "unknown congestion control algorithm: 0x%x\n",
 3146                     meshconf->conf_ccid);
 3147                 return 1;
 3148         }
 3149         if (meshconf->conf_syncid != IEEE80211_MESHCONF_SYNC_NEIGHOFF) {
 3150                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
 3151                     "unknown sync algorithm: 0x%x\n",
 3152                     meshconf->conf_syncid);
 3153                 return 1;
 3154         }
 3155         if (meshconf->conf_authid != 0) {
 3156                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
 3157                     "unknown auth auth algorithm: 0x%x\n",
 3158                     meshconf->conf_pselid);
 3159                 return 1;
 3160         }
 3161         /* Not accepting peers */
 3162         if (!(meshconf->conf_cap & IEEE80211_MESHCONF_CAP_AP)) {
 3163                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
 3164                     "not accepting peers: 0x%x\n", meshconf->conf_cap);
 3165                 return 1;
 3166         }
 3167         return 0;
 3168 }
 3169 
 3170 static int
 3171 mesh_verify_meshpeer(struct ieee80211vap *vap, uint8_t subtype,
 3172     const uint8_t *ie)
 3173 {
 3174         const struct ieee80211_meshpeer_ie *meshpeer =
 3175             (const struct ieee80211_meshpeer_ie *) ie;
 3176 
 3177         if (meshpeer == NULL ||
 3178             meshpeer->peer_len < IEEE80211_MPM_BASE_SZ ||
 3179             meshpeer->peer_len > IEEE80211_MPM_MAX_SZ)
 3180                 return 1;
 3181         if (meshpeer->peer_proto != IEEE80211_MPPID_MPM) {
 3182                 IEEE80211_DPRINTF(vap,
 3183                     IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
 3184                     "Only MPM protocol is supported (proto: 0x%02X)",
 3185                     meshpeer->peer_proto);
 3186                 return 1;
 3187         }
 3188         switch (subtype) {
 3189         case IEEE80211_ACTION_MESHPEERING_OPEN:
 3190                 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ)
 3191                         return 1;
 3192                 break;
 3193         case IEEE80211_ACTION_MESHPEERING_CONFIRM:
 3194                 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ + 2)
 3195                         return 1;
 3196                 break;
 3197         case IEEE80211_ACTION_MESHPEERING_CLOSE:
 3198                 if (meshpeer->peer_len < IEEE80211_MPM_BASE_SZ + 2)
 3199                         return 1;
 3200                 if (meshpeer->peer_len == (IEEE80211_MPM_BASE_SZ + 2) &&
 3201                     meshpeer->peer_linkid != 0)
 3202                         return 1;
 3203                 if (meshpeer->peer_rcode == 0)
 3204                         return 1;
 3205                 break;
 3206         }
 3207         return 0;
 3208 }
 3209 
 3210 /*
 3211  * Add a Mesh ID IE to a frame.
 3212  */
 3213 uint8_t *
 3214 ieee80211_add_meshid(uint8_t *frm, struct ieee80211vap *vap)
 3215 {
 3216         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 3217 
 3218         KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a mbss vap"));
 3219 
 3220         *frm++ = IEEE80211_ELEMID_MESHID;
 3221         *frm++ = ms->ms_idlen;
 3222         memcpy(frm, ms->ms_id, ms->ms_idlen);
 3223         return frm + ms->ms_idlen;
 3224 }
 3225 
 3226 /*
 3227  * Add a Mesh Configuration IE to a frame.
 3228  * For now just use HWMP routing, Airtime link metric, Null Congestion
 3229  * Signaling, Null Sync Protocol and Null Authentication.
 3230  */
 3231 uint8_t *
 3232 ieee80211_add_meshconf(uint8_t *frm, struct ieee80211vap *vap)
 3233 {
 3234         const struct ieee80211_mesh_state *ms = vap->iv_mesh;
 3235         uint16_t caps;
 3236 
 3237         KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap"));
 3238 
 3239         *frm++ = IEEE80211_ELEMID_MESHCONF;
 3240         *frm++ = IEEE80211_MESH_CONF_SZ;
 3241         *frm++ = ms->ms_ppath->mpp_ie;          /* path selection */
 3242         *frm++ = ms->ms_pmetric->mpm_ie;        /* link metric */
 3243         *frm++ = IEEE80211_MESHCONF_CC_DISABLED;
 3244         *frm++ = IEEE80211_MESHCONF_SYNC_NEIGHOFF;
 3245         *frm++ = IEEE80211_MESHCONF_AUTH_DISABLED;
 3246         /* NB: set the number of neighbors before the rest */
 3247         *frm = (ms->ms_neighbors > IEEE80211_MESH_MAX_NEIGHBORS ?
 3248             IEEE80211_MESH_MAX_NEIGHBORS : ms->ms_neighbors) << 1;
 3249         if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE)
 3250                 *frm |= IEEE80211_MESHCONF_FORM_GATE;
 3251         frm += 1;
 3252         caps = 0;
 3253         if (ms->ms_flags & IEEE80211_MESHFLAGS_AP)
 3254                 caps |= IEEE80211_MESHCONF_CAP_AP;
 3255         if (ms->ms_flags & IEEE80211_MESHFLAGS_FWD)
 3256                 caps |= IEEE80211_MESHCONF_CAP_FWRD;
 3257         *frm++ = caps;
 3258         return frm;
 3259 }
 3260 
 3261 /*
 3262  * Add a Mesh Peer Management IE to a frame.
 3263  */
 3264 uint8_t *
 3265 ieee80211_add_meshpeer(uint8_t *frm, uint8_t subtype, uint16_t localid,
 3266     uint16_t peerid, uint16_t reason)
 3267 {
 3268 
 3269         KASSERT(localid != 0, ("localid == 0"));
 3270 
 3271         *frm++ = IEEE80211_ELEMID_MESHPEER;
 3272         switch (subtype) {
 3273         case IEEE80211_ACTION_MESHPEERING_OPEN:
 3274                 *frm++ = IEEE80211_MPM_BASE_SZ;         /* length */
 3275                 ADDSHORT(frm, IEEE80211_MPPID_MPM);     /* proto */
 3276                 ADDSHORT(frm, localid);                 /* local ID */
 3277                 break;
 3278         case IEEE80211_ACTION_MESHPEERING_CONFIRM:
 3279                 KASSERT(peerid != 0, ("sending peer confirm without peer id"));
 3280                 *frm++ = IEEE80211_MPM_BASE_SZ + 2;     /* length */
 3281                 ADDSHORT(frm, IEEE80211_MPPID_MPM);     /* proto */
 3282                 ADDSHORT(frm, localid);                 /* local ID */
 3283                 ADDSHORT(frm, peerid);                  /* peer ID */
 3284                 break;
 3285         case IEEE80211_ACTION_MESHPEERING_CLOSE:
 3286                 if (peerid)
 3287                         *frm++ = IEEE80211_MPM_MAX_SZ;  /* length */
 3288                 else
 3289                         *frm++ = IEEE80211_MPM_BASE_SZ + 2; /* length */
 3290                 ADDSHORT(frm, IEEE80211_MPPID_MPM);     /* proto */
 3291                 ADDSHORT(frm, localid); /* local ID */
 3292                 if (peerid)
 3293                         ADDSHORT(frm, peerid);  /* peer ID */
 3294                 ADDSHORT(frm, reason);
 3295                 break;
 3296         }
 3297         return frm;
 3298 }
 3299 
 3300 /*
 3301  * Compute an Airtime Link Metric for the link with this node.
 3302  *
 3303  * Based on Draft 3.0 spec (11B.10, p.149).
 3304  */
 3305 /*
 3306  * Max 802.11s overhead.
 3307  */
 3308 #define IEEE80211_MESH_MAXOVERHEAD \
 3309         (sizeof(struct ieee80211_qosframe_addr4) \
 3310          + sizeof(struct ieee80211_meshcntl_ae10) \
 3311         + sizeof(struct llc) \
 3312         + IEEE80211_ADDR_LEN \
 3313         + IEEE80211_WEP_IVLEN \
 3314         + IEEE80211_WEP_KIDLEN \
 3315         + IEEE80211_WEP_CRCLEN \
 3316         + IEEE80211_WEP_MICLEN \
 3317         + IEEE80211_CRC_LEN)
 3318 uint32_t
 3319 mesh_airtime_calc(struct ieee80211_node *ni)
 3320 {
 3321 #define M_BITS 8
 3322 #define S_FACTOR (2 * M_BITS)
 3323         struct ieee80211com *ic = ni->ni_ic;
 3324         struct ifnet *ifp = ni->ni_vap->iv_ifp;
 3325         const static int nbits = 8192 << M_BITS;
 3326         uint32_t overhead, rate, errrate;
 3327         uint64_t res;
 3328 
 3329         /* Time to transmit a frame */
 3330         rate = ni->ni_txrate;
 3331         overhead = ieee80211_compute_duration(ic->ic_rt,
 3332             ifp->if_mtu + IEEE80211_MESH_MAXOVERHEAD, rate, 0) << M_BITS;
 3333         /* Error rate in percentage */
 3334         /* XXX assuming small failures are ok */
 3335         errrate = (((ifp->if_oerrors +
 3336             ifp->if_ierrors) / 100) << M_BITS) / 100;
 3337         res = (overhead + (nbits / rate)) *
 3338             ((1 << S_FACTOR) / ((1 << M_BITS) - errrate));
 3339 
 3340         return (uint32_t)(res >> S_FACTOR);
 3341 #undef M_BITS
 3342 #undef S_FACTOR
 3343 }
 3344 
 3345 /*
 3346  * Add a Mesh Link Metric report IE to a frame.
 3347  */
 3348 uint8_t *
 3349 ieee80211_add_meshlmetric(uint8_t *frm, uint8_t flags, uint32_t metric)
 3350 {
 3351         *frm++ = IEEE80211_ELEMID_MESHLINK;
 3352         *frm++ = 5;
 3353         *frm++ = flags;
 3354         ADDWORD(frm, metric);
 3355         return frm;
 3356 }
 3357 
 3358 /*
 3359  * Add a Mesh Gate Announcement IE to a frame.
 3360  */
 3361 uint8_t *
 3362 ieee80211_add_meshgate(uint8_t *frm, struct ieee80211_meshgann_ie *ie)
 3363 {
 3364         *frm++ = IEEE80211_ELEMID_MESHGANN; /* ie */
 3365         *frm++ = IEEE80211_MESHGANN_BASE_SZ; /* len */
 3366         *frm++ = ie->gann_flags;
 3367         *frm++ = ie->gann_hopcount;
 3368         *frm++ = ie->gann_ttl;
 3369         IEEE80211_ADDR_COPY(frm, ie->gann_addr);
 3370         frm += 6;
 3371         ADDWORD(frm, ie->gann_seq);
 3372         ADDSHORT(frm, ie->gann_interval);
 3373         return frm;
 3374 }
 3375 #undef ADDSHORT
 3376 #undef ADDWORD
 3377 
 3378 /*
 3379  * Initialize any mesh-specific node state.
 3380  */
 3381 void
 3382 ieee80211_mesh_node_init(struct ieee80211vap *vap, struct ieee80211_node *ni)
 3383 {
 3384         ni->ni_flags |= IEEE80211_NODE_QOS;
 3385         callout_init(&ni->ni_mltimer, CALLOUT_MPSAFE);
 3386         callout_init(&ni->ni_mlhtimer, CALLOUT_MPSAFE);
 3387 }
 3388 
 3389 /*
 3390  * Cleanup any mesh-specific node state.
 3391  */
 3392 void
 3393 ieee80211_mesh_node_cleanup(struct ieee80211_node *ni)
 3394 {
 3395         struct ieee80211vap *vap = ni->ni_vap;
 3396         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 3397 
 3398         callout_drain(&ni->ni_mltimer);
 3399         callout_drain(&ni->ni_mlhtimer);
 3400         /* NB: short-circuit callbacks after mesh_vdetach */
 3401         if (vap->iv_mesh != NULL)
 3402                 ms->ms_ppath->mpp_peerdown(ni);
 3403 }
 3404 
 3405 void
 3406 ieee80211_parse_meshid(struct ieee80211_node *ni, const uint8_t *ie)
 3407 {
 3408         ni->ni_meshidlen = ie[1];
 3409         memcpy(ni->ni_meshid, ie + 2, ie[1]);
 3410 }
 3411 
 3412 /*
 3413  * Setup mesh-specific node state on neighbor discovery.
 3414  */
 3415 void
 3416 ieee80211_mesh_init_neighbor(struct ieee80211_node *ni,
 3417         const struct ieee80211_frame *wh,
 3418         const struct ieee80211_scanparams *sp)
 3419 {
 3420         ieee80211_parse_meshid(ni, sp->meshid);
 3421 }
 3422 
 3423 void
 3424 ieee80211_mesh_update_beacon(struct ieee80211vap *vap,
 3425         struct ieee80211_beacon_offsets *bo)
 3426 {
 3427         KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap"));
 3428 
 3429         if (isset(bo->bo_flags, IEEE80211_BEACON_MESHCONF)) {
 3430                 (void)ieee80211_add_meshconf(bo->bo_meshconf, vap);
 3431                 clrbit(bo->bo_flags, IEEE80211_BEACON_MESHCONF);
 3432         }
 3433 }
 3434 
 3435 static int
 3436 mesh_ioctl_get80211(struct ieee80211vap *vap, struct ieee80211req *ireq)
 3437 {
 3438         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 3439         uint8_t tmpmeshid[IEEE80211_NWID_LEN];
 3440         struct ieee80211_mesh_route *rt;
 3441         struct ieee80211req_mesh_route *imr;
 3442         size_t len, off;
 3443         uint8_t *p;
 3444         int error;
 3445 
 3446         if (vap->iv_opmode != IEEE80211_M_MBSS)
 3447                 return ENOSYS;
 3448 
 3449         error = 0;
 3450         switch (ireq->i_type) {
 3451         case IEEE80211_IOC_MESH_ID:
 3452                 ireq->i_len = ms->ms_idlen;
 3453                 memcpy(tmpmeshid, ms->ms_id, ireq->i_len);
 3454                 error = copyout(tmpmeshid, ireq->i_data, ireq->i_len);
 3455                 break;
 3456         case IEEE80211_IOC_MESH_AP:
 3457                 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_AP) != 0;
 3458                 break;
 3459         case IEEE80211_IOC_MESH_FWRD:
 3460                 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) != 0;
 3461                 break;
 3462         case IEEE80211_IOC_MESH_GATE:
 3463                 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) != 0;
 3464                 break;
 3465         case IEEE80211_IOC_MESH_TTL:
 3466                 ireq->i_val = ms->ms_ttl;
 3467                 break;
 3468         case IEEE80211_IOC_MESH_RTCMD:
 3469                 switch (ireq->i_val) {
 3470                 case IEEE80211_MESH_RTCMD_LIST:
 3471                         len = 0;
 3472                         MESH_RT_LOCK(ms);
 3473                         TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) {
 3474                                 len += sizeof(*imr);
 3475                         }
 3476                         MESH_RT_UNLOCK(ms);
 3477                         if (len > ireq->i_len || ireq->i_len < sizeof(*imr)) {
 3478                                 ireq->i_len = len;
 3479                                 return ENOMEM;
 3480                         }
 3481                         ireq->i_len = len;
 3482                         /* XXX M_WAIT? */
 3483                         p = malloc(len, M_TEMP, M_NOWAIT | M_ZERO);
 3484                         if (p == NULL)
 3485                                 return ENOMEM;
 3486                         off = 0;
 3487                         MESH_RT_LOCK(ms);
 3488                         TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) {
 3489                                 if (off >= len)
 3490                                         break;
 3491                                 imr = (struct ieee80211req_mesh_route *)
 3492                                     (p + off);
 3493                                 IEEE80211_ADDR_COPY(imr->imr_dest,
 3494                                     rt->rt_dest);
 3495                                 IEEE80211_ADDR_COPY(imr->imr_nexthop,
 3496                                     rt->rt_nexthop);
 3497                                 imr->imr_metric = rt->rt_metric;
 3498                                 imr->imr_nhops = rt->rt_nhops;
 3499                                 imr->imr_lifetime =
 3500                                     ieee80211_mesh_rt_update(rt, 0);
 3501                                 imr->imr_lastmseq = rt->rt_lastmseq;
 3502                                 imr->imr_flags = rt->rt_flags; /* last */
 3503                                 off += sizeof(*imr);
 3504                         }
 3505                         MESH_RT_UNLOCK(ms);
 3506                         error = copyout(p, (uint8_t *)ireq->i_data,
 3507                             ireq->i_len);
 3508                         free(p, M_TEMP);
 3509                         break;
 3510                 case IEEE80211_MESH_RTCMD_FLUSH:
 3511                 case IEEE80211_MESH_RTCMD_ADD:
 3512                 case IEEE80211_MESH_RTCMD_DELETE:
 3513                         return EINVAL;
 3514                 default:
 3515                         return ENOSYS;
 3516                 }
 3517                 break;
 3518         case IEEE80211_IOC_MESH_PR_METRIC:
 3519                 len = strlen(ms->ms_pmetric->mpm_descr);
 3520                 if (ireq->i_len < len)
 3521                         return EINVAL;
 3522                 ireq->i_len = len;
 3523                 error = copyout(ms->ms_pmetric->mpm_descr,
 3524                     (uint8_t *)ireq->i_data, len);
 3525                 break;
 3526         case IEEE80211_IOC_MESH_PR_PATH:
 3527                 len = strlen(ms->ms_ppath->mpp_descr);
 3528                 if (ireq->i_len < len)
 3529                         return EINVAL;
 3530                 ireq->i_len = len;
 3531                 error = copyout(ms->ms_ppath->mpp_descr,
 3532                     (uint8_t *)ireq->i_data, len);
 3533                 break;
 3534         default:
 3535                 return ENOSYS;
 3536         }
 3537 
 3538         return error;
 3539 }
 3540 IEEE80211_IOCTL_GET(mesh, mesh_ioctl_get80211);
 3541 
 3542 static int
 3543 mesh_ioctl_set80211(struct ieee80211vap *vap, struct ieee80211req *ireq)
 3544 {
 3545         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 3546         uint8_t tmpmeshid[IEEE80211_NWID_LEN];
 3547         uint8_t tmpaddr[IEEE80211_ADDR_LEN];
 3548         char tmpproto[IEEE80211_MESH_PROTO_DSZ];
 3549         int error;
 3550 
 3551         if (vap->iv_opmode != IEEE80211_M_MBSS)
 3552                 return ENOSYS;
 3553 
 3554         error = 0;
 3555         switch (ireq->i_type) {
 3556         case IEEE80211_IOC_MESH_ID:
 3557                 if (ireq->i_val != 0 || ireq->i_len > IEEE80211_MESHID_LEN)
 3558                         return EINVAL;
 3559                 error = copyin(ireq->i_data, tmpmeshid, ireq->i_len);
 3560                 if (error != 0)
 3561                         break;
 3562                 memset(ms->ms_id, 0, IEEE80211_NWID_LEN);
 3563                 ms->ms_idlen = ireq->i_len;
 3564                 memcpy(ms->ms_id, tmpmeshid, ireq->i_len);
 3565                 error = ENETRESET;
 3566                 break;
 3567         case IEEE80211_IOC_MESH_AP:
 3568                 if (ireq->i_val)
 3569                         ms->ms_flags |= IEEE80211_MESHFLAGS_AP;
 3570                 else
 3571                         ms->ms_flags &= ~IEEE80211_MESHFLAGS_AP;
 3572                 error = ENETRESET;
 3573                 break;
 3574         case IEEE80211_IOC_MESH_FWRD:
 3575                 if (ireq->i_val)
 3576                         ms->ms_flags |= IEEE80211_MESHFLAGS_FWD;
 3577                 else
 3578                         ms->ms_flags &= ~IEEE80211_MESHFLAGS_FWD;
 3579                 mesh_gatemode_setup(vap);
 3580                 break;
 3581         case IEEE80211_IOC_MESH_GATE:
 3582                 if (ireq->i_val)
 3583                         ms->ms_flags |= IEEE80211_MESHFLAGS_GATE;
 3584                 else
 3585                         ms->ms_flags &= ~IEEE80211_MESHFLAGS_GATE;
 3586                 break;
 3587         case IEEE80211_IOC_MESH_TTL:
 3588                 ms->ms_ttl = (uint8_t) ireq->i_val;
 3589                 break;
 3590         case IEEE80211_IOC_MESH_RTCMD:
 3591                 switch (ireq->i_val) {
 3592                 case IEEE80211_MESH_RTCMD_LIST:
 3593                         return EINVAL;
 3594                 case IEEE80211_MESH_RTCMD_FLUSH:
 3595                         ieee80211_mesh_rt_flush(vap);
 3596                         break;
 3597                 case IEEE80211_MESH_RTCMD_ADD:
 3598                         if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ireq->i_data) ||
 3599                             IEEE80211_ADDR_EQ(broadcastaddr, ireq->i_data))
 3600                                 return EINVAL;
 3601                         error = copyin(ireq->i_data, &tmpaddr,
 3602                             IEEE80211_ADDR_LEN);
 3603                         if (error == 0)
 3604                                 ieee80211_mesh_discover(vap, tmpaddr, NULL);
 3605                         break;
 3606                 case IEEE80211_MESH_RTCMD_DELETE:
 3607                         ieee80211_mesh_rt_del(vap, ireq->i_data);
 3608                         break;
 3609                 default:
 3610                         return ENOSYS;
 3611                 }
 3612                 break;
 3613         case IEEE80211_IOC_MESH_PR_METRIC:
 3614                 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto));
 3615                 if (error == 0) {
 3616                         error = mesh_select_proto_metric(vap, tmpproto);
 3617                         if (error == 0)
 3618                                 error = ENETRESET;
 3619                 }
 3620                 break;
 3621         case IEEE80211_IOC_MESH_PR_PATH:
 3622                 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto));
 3623                 if (error == 0) {
 3624                         error = mesh_select_proto_path(vap, tmpproto);
 3625                         if (error == 0)
 3626                                 error = ENETRESET;
 3627                 }
 3628                 break;
 3629         default:
 3630                 return ENOSYS;
 3631         }
 3632         return error;
 3633 }
 3634 IEEE80211_IOCTL_SET(mesh, mesh_ioctl_set80211);

Cache object: c1ad0a9857111420b4dd3a4a67711807


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]


This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.