sys/net80211/ieee80211_mesh.c

   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("$FreeBSD$");
  32 #endif
  33
  34 /*
  35  * IEEE 802.11s Mesh Point (MBSS) support.
  36  *
  37  * Based on March 2009, D3.0 802.11s draft spec.
  38  */
  39 #include "opt_inet.h"
  40 #include "opt_wlan.h"
  41
  42 #include <sys/param.h>
  43 #include <sys/systm.h>
  44 #include <sys/mbuf.h>
  45 #include <sys/malloc.h>
  46 #include <sys/kernel.h>
  47
  48 #include <sys/socket.h>
  49 #include <sys/sockio.h>
  50 #include <sys/endian.h>
  51 #include <sys/errno.h>
  52 #include <sys/proc.h>
  53 #include <sys/sysctl.h>
  54
  55 #include <net/bpf.h>
  56 #include <net/if.h>
  57 #include <net/if_var.h>
  58 #include <net/if_media.h>
  59 #include <net/if_llc.h>
  60 #include <net/ethernet.h>
  61
  62 #include <net80211/ieee80211_var.h>
  63 #include <net80211/ieee80211_action.h>
  64 #ifdef IEEE80211_SUPPORT_SUPERG
  65 #include <net80211/ieee80211_superg.h>
  66 #endif
  67 #include <net80211/ieee80211_input.h>
  68 #include <net80211/ieee80211_mesh.h>
  69
  70 static void     mesh_rt_flush_invalid(struct ieee80211vap *);
  71 static int      mesh_select_proto_path(struct ieee80211vap *, const char *);
  72 static int      mesh_select_proto_metric(struct ieee80211vap *, const char *);
  73 static void     mesh_vattach(struct ieee80211vap *);
  74 static int      mesh_newstate(struct ieee80211vap *, enum ieee80211_state, int);
  75 static void     mesh_rt_cleanup_cb(void *);
  76 static void     mesh_gatemode_setup(struct ieee80211vap *);
  77 static void     mesh_gatemode_cb(void *);
  78 static void     mesh_linkchange(struct ieee80211_node *,
  79                     enum ieee80211_mesh_mlstate);
  80 static void     mesh_checkid(void *, struct ieee80211_node *);
  81 static uint32_t mesh_generateid(struct ieee80211vap *);
  82 static int      mesh_checkpseq(struct ieee80211vap *,
  83                     const uint8_t [IEEE80211_ADDR_LEN], uint32_t);
  84 static void     mesh_transmit_to_gate(struct ieee80211vap *, struct mbuf *,
  85                     struct ieee80211_mesh_route *);
  86 static void     mesh_forward(struct ieee80211vap *, struct mbuf *,
  87                     const struct ieee80211_meshcntl *);
  88 static int      mesh_input(struct ieee80211_node *, struct mbuf *,
  89                     const struct ieee80211_rx_stats *rxs, int, int);
  90 static void     mesh_recv_mgmt(struct ieee80211_node *, struct mbuf *, int,
  91                     const struct ieee80211_rx_stats *rxs, int, int);
  92 static void     mesh_recv_ctl(struct ieee80211_node *, struct mbuf *, int);
  93 static void     mesh_peer_timeout_setup(struct ieee80211_node *);
  94 static void     mesh_peer_timeout_backoff(struct ieee80211_node *);
  95 static void     mesh_peer_timeout_cb(void *);
  96 static __inline void
  97                 mesh_peer_timeout_stop(struct ieee80211_node *);
  98 static int      mesh_verify_meshid(struct ieee80211vap *, const uint8_t *);
  99 static int      mesh_verify_meshconf(struct ieee80211vap *, const uint8_t *);
 100 static int      mesh_verify_meshpeer(struct ieee80211vap *, uint8_t,
 101                     const uint8_t *);
 102 uint32_t        mesh_airtime_calc(struct ieee80211_node *);
 103
 104 /*
 105  * Timeout values come from the specification and are in milliseconds.
 106  */
 107 static SYSCTL_NODE(_net_wlan, OID_AUTO, mesh, CTLFLAG_RD, 0,
 108     "IEEE 802.11s parameters");
 109 static int      ieee80211_mesh_gateint = -1;
 110 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, gateint, CTLTYPE_INT | CTLFLAG_RW,
 111     &ieee80211_mesh_gateint, 0, ieee80211_sysctl_msecs_ticks, "I",
 112     "mesh gate interval (ms)");
 113 static int ieee80211_mesh_retrytimeout = -1;
 114 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, retrytimeout, CTLTYPE_INT | CTLFLAG_RW,
 115     &ieee80211_mesh_retrytimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
 116     "Retry timeout (msec)");
 117 static int ieee80211_mesh_holdingtimeout = -1;
 118
 119 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, holdingtimeout, CTLTYPE_INT | CTLFLAG_RW,
 120     &ieee80211_mesh_holdingtimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
 121     "Holding state timeout (msec)");
 122 static int ieee80211_mesh_confirmtimeout = -1;
 123 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, confirmtimeout, CTLTYPE_INT | CTLFLAG_RW,
 124     &ieee80211_mesh_confirmtimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
 125     "Confirm state timeout (msec)");
 126 static int ieee80211_mesh_backofftimeout = -1;
 127 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, backofftimeout, CTLTYPE_INT | CTLFLAG_RW,
 128     &ieee80211_mesh_backofftimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
 129     "Backoff timeout (msec). This is to throutles peering forever when "
 130     "not receiving answer or is rejected by a neighbor");
 131 static int ieee80211_mesh_maxretries = 2;
 132 SYSCTL_INT(_net_wlan_mesh, OID_AUTO, maxretries, CTLFLAG_RW,
 133     &ieee80211_mesh_maxretries, 0,
 134     "Maximum retries during peer link establishment");
 135 static int ieee80211_mesh_maxholding = 2;
 136 SYSCTL_INT(_net_wlan_mesh, OID_AUTO, maxholding, CTLFLAG_RW,
 137     &ieee80211_mesh_maxholding, 0,
 138     "Maximum times we are allowed to transition to HOLDING state before "
 139     "backinoff during peer link establishment");
 140
 141 static const uint8_t broadcastaddr[IEEE80211_ADDR_LEN] =
 142         { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 143
 144 static  ieee80211_recv_action_func mesh_recv_action_meshpeering_open;
 145 static  ieee80211_recv_action_func mesh_recv_action_meshpeering_confirm;
 146 static  ieee80211_recv_action_func mesh_recv_action_meshpeering_close;
 147 static  ieee80211_recv_action_func mesh_recv_action_meshlmetric;
 148 static  ieee80211_recv_action_func mesh_recv_action_meshgate;
 149
 150 static  ieee80211_send_action_func mesh_send_action_meshpeering_open;
 151 static  ieee80211_send_action_func mesh_send_action_meshpeering_confirm;
 152 static  ieee80211_send_action_func mesh_send_action_meshpeering_close;
 153 static  ieee80211_send_action_func mesh_send_action_meshlmetric;
 154 static  ieee80211_send_action_func mesh_send_action_meshgate;
 155
 156 static const struct ieee80211_mesh_proto_metric mesh_metric_airtime = {
 157         .mpm_descr      = "AIRTIME",
 158         .mpm_ie         = IEEE80211_MESHCONF_METRIC_AIRTIME,
 159         .mpm_metric     = mesh_airtime_calc,
 160 };
 161
 162 static struct ieee80211_mesh_proto_path         mesh_proto_paths[4];
 163 static struct ieee80211_mesh_proto_metric       mesh_proto_metrics[4];
 164
 165 MALLOC_DEFINE(M_80211_MESH_PREQ, "80211preq", "802.11 MESH Path Request frame");
 166 MALLOC_DEFINE(M_80211_MESH_PREP, "80211prep", "802.11 MESH Path Reply frame");
 167 MALLOC_DEFINE(M_80211_MESH_PERR, "80211perr", "802.11 MESH Path Error frame");
 168
 169 /* The longer one of the lifetime should be stored as new lifetime */
 170 #define MESH_ROUTE_LIFETIME_MAX(a, b)   (a > b ? a : b)
 171
 172 MALLOC_DEFINE(M_80211_MESH_RT, "80211mesh_rt", "802.11s routing table");
 173 MALLOC_DEFINE(M_80211_MESH_GT_RT, "80211mesh_gt", "802.11s known gates table");
 174
 175 /*
 176  * Helper functions to manipulate the Mesh routing table.
 177  */
 178
 179 static struct ieee80211_mesh_route *
 180 mesh_rt_find_locked(struct ieee80211_mesh_state *ms,
 181     const uint8_t dest[IEEE80211_ADDR_LEN])
 182 {
 183         struct ieee80211_mesh_route *rt;
 184
 185         MESH_RT_LOCK_ASSERT(ms);
 186
 187         TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) {
 188                 if (IEEE80211_ADDR_EQ(dest, rt->rt_dest))
 189                         return rt;
 190         }
 191         return NULL;
 192 }
 193
 194 static struct ieee80211_mesh_route *
 195 mesh_rt_add_locked(struct ieee80211vap *vap,
 196     const uint8_t dest[IEEE80211_ADDR_LEN])
 197 {
 198         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 199         struct ieee80211_mesh_route *rt;
 200
 201         KASSERT(!IEEE80211_ADDR_EQ(broadcastaddr, dest),
 202             ("%s: adding broadcast to the routing table", __func__));
 203
 204         MESH_RT_LOCK_ASSERT(ms);
 205
 206         rt = IEEE80211_MALLOC(ALIGN(sizeof(struct ieee80211_mesh_route)) +
 207             ms->ms_ppath->mpp_privlen, M_80211_MESH_RT,
 208             IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
 209         if (rt != NULL) {
 210                 rt->rt_vap = vap;
 211                 IEEE80211_ADDR_COPY(rt->rt_dest, dest);
 212                 rt->rt_priv = (void *)ALIGN(&rt[1]);
 213                 MESH_RT_ENTRY_LOCK_INIT(rt, "MBSS_RT");
 214                 callout_init(&rt->rt_discovery, 1);
 215                 rt->rt_updtime = ticks; /* create time */
 216                 TAILQ_INSERT_TAIL(&ms->ms_routes, rt, rt_next);
 217         }
 218         return rt;
 219 }
 220
 221 struct ieee80211_mesh_route *
 222 ieee80211_mesh_rt_find(struct ieee80211vap *vap,
 223     const uint8_t dest[IEEE80211_ADDR_LEN])
 224 {
 225         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 226         struct ieee80211_mesh_route *rt;
 227
 228         MESH_RT_LOCK(ms);
 229         rt = mesh_rt_find_locked(ms, dest);
 230         MESH_RT_UNLOCK(ms);
 231         return rt;
 232 }
 233
 234 struct ieee80211_mesh_route *
 235 ieee80211_mesh_rt_add(struct ieee80211vap *vap,
 236     const uint8_t dest[IEEE80211_ADDR_LEN])
 237 {
 238         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 239         struct ieee80211_mesh_route *rt;
 240
 241         KASSERT(ieee80211_mesh_rt_find(vap, dest) == NULL,
 242             ("%s: duplicate entry in the routing table", __func__));
 243         KASSERT(!IEEE80211_ADDR_EQ(vap->iv_myaddr, dest),
 244             ("%s: adding self to the routing table", __func__));
 245
 246         MESH_RT_LOCK(ms);
 247         rt = mesh_rt_add_locked(vap, dest);
 248         MESH_RT_UNLOCK(ms);
 249         return rt;
 250 }
 251
 252 /*
 253  * Update the route lifetime and returns the updated lifetime.
 254  * If new_lifetime is zero and route is timedout it will be invalidated.
 255  * new_lifetime is in msec
 256  */
 257 int
 258 ieee80211_mesh_rt_update(struct ieee80211_mesh_route *rt, int new_lifetime)
 259 {
 260         int timesince, now;
 261         uint32_t lifetime = 0;
 262
 263         KASSERT(rt != NULL, ("route is NULL"));
 264
 265         now = ticks;
 266         MESH_RT_ENTRY_LOCK(rt);
 267
 268         /* dont clobber a proxy entry gated by us */
 269         if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY && rt->rt_nhops == 0) {
 270                 MESH_RT_ENTRY_UNLOCK(rt);
 271                 return rt->rt_lifetime;
 272         }
 273
 274         timesince = ticks_to_msecs(now - rt->rt_updtime);
 275         rt->rt_updtime = now;
 276         if (timesince >= rt->rt_lifetime) {
 277                 if (new_lifetime != 0) {
 278                         rt->rt_lifetime = new_lifetime;
 279                 }
 280                 else {
 281                         rt->rt_flags &= ~IEEE80211_MESHRT_FLAGS_VALID;
 282                         rt->rt_lifetime = 0;
 283                 }
 284         } else {
 285                 /* update what is left of lifetime */
 286                 rt->rt_lifetime = rt->rt_lifetime - timesince;
 287                 rt->rt_lifetime  = MESH_ROUTE_LIFETIME_MAX(
 288                         new_lifetime, rt->rt_lifetime);
 289         }
 290         lifetime = rt->rt_lifetime;
 291         MESH_RT_ENTRY_UNLOCK(rt);
 292
 293         return lifetime;
 294 }
 295
 296 /*
 297  * Add a proxy route (as needed) for the specified destination.
 298  */
 299 void
 300 ieee80211_mesh_proxy_check(struct ieee80211vap *vap,
 301     const uint8_t dest[IEEE80211_ADDR_LEN])
 302 {
 303         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 304         struct ieee80211_mesh_route *rt;
 305
 306         MESH_RT_LOCK(ms);
 307         rt = mesh_rt_find_locked(ms, dest);
 308         if (rt == NULL) {
 309                 rt = mesh_rt_add_locked(vap, dest);
 310                 if (rt == NULL) {
 311                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
 312                             "%s", "unable to add proxy entry");
 313                         vap->iv_stats.is_mesh_rtaddfailed++;
 314                 } else {
 315                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
 316                             "%s", "add proxy entry");
 317                         IEEE80211_ADDR_COPY(rt->rt_mesh_gate, vap->iv_myaddr);
 318                         IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr);
 319                         rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID
 320                                      |  IEEE80211_MESHRT_FLAGS_PROXY;
 321                 }
 322         } else if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) {
 323                 KASSERT(rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY,
 324                     ("no proxy flag for poxy entry"));
 325                 struct ieee80211com *ic = vap->iv_ic;
 326                 /*
 327                  * Fix existing entry created by received frames from
 328                  * stations that have some memory of dest.  We also
 329                  * flush any frames held on the staging queue; delivering
 330                  * them is too much trouble right now.
 331                  */
 332                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
 333                     "%s", "fix proxy entry");
 334                 IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr);
 335                 rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID
 336                              |  IEEE80211_MESHRT_FLAGS_PROXY;
 337                 /* XXX belongs in hwmp */
 338                 ieee80211_ageq_drain_node(&ic->ic_stageq,
 339                    (void *)(uintptr_t) ieee80211_mac_hash(ic, dest));
 340                 /* XXX stat? */
 341         }
 342         MESH_RT_UNLOCK(ms);
 343 }
 344
 345 static __inline void
 346 mesh_rt_del(struct ieee80211_mesh_state *ms, struct ieee80211_mesh_route *rt)
 347 {
 348         TAILQ_REMOVE(&ms->ms_routes, rt, rt_next);
 349         /*
 350          * Grab the lock before destroying it, to be sure no one else
 351          * is holding the route.
 352          */
 353         MESH_RT_ENTRY_LOCK(rt);
 354         callout_drain(&rt->rt_discovery);
 355         MESH_RT_ENTRY_LOCK_DESTROY(rt);
 356         IEEE80211_FREE(rt, M_80211_MESH_RT);
 357 }
 358
 359 void
 360 ieee80211_mesh_rt_del(struct ieee80211vap *vap,
 361     const uint8_t dest[IEEE80211_ADDR_LEN])
 362 {
 363         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 364         struct ieee80211_mesh_route *rt, *next;
 365
 366         MESH_RT_LOCK(ms);
 367         TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) {
 368                 if (IEEE80211_ADDR_EQ(rt->rt_dest, dest)) {
 369                         if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) {
 370                                 ms->ms_ppath->mpp_senderror(vap, dest, rt,
 371                                     IEEE80211_REASON_MESH_PERR_NO_PROXY);
 372                         } else {
 373                                 ms->ms_ppath->mpp_senderror(vap, dest, rt,
 374                                     IEEE80211_REASON_MESH_PERR_DEST_UNREACH);
 375                         }
 376                         mesh_rt_del(ms, rt);
 377                         MESH_RT_UNLOCK(ms);
 378                         return;
 379                 }
 380         }
 381         MESH_RT_UNLOCK(ms);
 382 }
 383
 384 void
 385 ieee80211_mesh_rt_flush(struct ieee80211vap *vap)
 386 {
 387         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 388         struct ieee80211_mesh_route *rt, *next;
 389
 390         if (ms == NULL)
 391                 return;
 392         MESH_RT_LOCK(ms);
 393         TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next)
 394                 mesh_rt_del(ms, rt);
 395         MESH_RT_UNLOCK(ms);
 396 }
 397
 398 void
 399 ieee80211_mesh_rt_flush_peer(struct ieee80211vap *vap,
 400     const uint8_t peer[IEEE80211_ADDR_LEN])
 401 {
 402         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 403         struct ieee80211_mesh_route *rt, *next;
 404
 405         MESH_RT_LOCK(ms);
 406         TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) {
 407                 if (IEEE80211_ADDR_EQ(rt->rt_nexthop, peer))
 408                         mesh_rt_del(ms, rt);
 409         }
 410         MESH_RT_UNLOCK(ms);
 411 }
 412
 413 /*
 414  * Flush expired routing entries, i.e. those in invalid state for
 415  * some time.
 416  */
 417 static void
 418 mesh_rt_flush_invalid(struct ieee80211vap *vap)
 419 {
 420         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 421         struct ieee80211_mesh_route *rt, *next;
 422
 423         if (ms == NULL)
 424                 return;
 425         MESH_RT_LOCK(ms);
 426         TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) {
 427                 /* Discover paths will be deleted by their own callout */
 428                 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_DISCOVER)
 429                         continue;
 430                 ieee80211_mesh_rt_update(rt, 0);
 431                 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0)
 432                         mesh_rt_del(ms, rt);
 433         }
 434         MESH_RT_UNLOCK(ms);
 435 }
 436
 437 int
 438 ieee80211_mesh_register_proto_path(const struct ieee80211_mesh_proto_path *mpp)
 439 {
 440         int i, firstempty = -1;
 441
 442         for (i = 0; i < nitems(mesh_proto_paths); i++) {
 443                 if (strncmp(mpp->mpp_descr, mesh_proto_paths[i].mpp_descr,
 444                     IEEE80211_MESH_PROTO_DSZ) == 0)
 445                         return EEXIST;
 446                 if (!mesh_proto_paths[i].mpp_active && firstempty == -1)
 447                         firstempty = i;
 448         }
 449         if (firstempty < 0)
 450                 return ENOSPC;
 451         memcpy(&mesh_proto_paths[firstempty], mpp, sizeof(*mpp));
 452         mesh_proto_paths[firstempty].mpp_active = 1;
 453         return 0;
 454 }
 455
 456 int
 457 ieee80211_mesh_register_proto_metric(const struct
 458     ieee80211_mesh_proto_metric *mpm)
 459 {
 460         int i, firstempty = -1;
 461
 462         for (i = 0; i < nitems(mesh_proto_metrics); i++) {
 463                 if (strncmp(mpm->mpm_descr, mesh_proto_metrics[i].mpm_descr,
 464                     IEEE80211_MESH_PROTO_DSZ) == 0)
 465                         return EEXIST;
 466                 if (!mesh_proto_metrics[i].mpm_active && firstempty == -1)
 467                         firstempty = i;
 468         }
 469         if (firstempty < 0)
 470                 return ENOSPC;
 471         memcpy(&mesh_proto_metrics[firstempty], mpm, sizeof(*mpm));
 472         mesh_proto_metrics[firstempty].mpm_active = 1;
 473         return 0;
 474 }
 475
 476 static int
 477 mesh_select_proto_path(struct ieee80211vap *vap, const char *name)
 478 {
 479         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 480         int i;
 481
 482         for (i = 0; i < nitems(mesh_proto_paths); i++) {
 483                 if (strcasecmp(mesh_proto_paths[i].mpp_descr, name) == 0) {
 484                         ms->ms_ppath = &mesh_proto_paths[i];
 485                         return 0;
 486                 }
 487         }
 488         return ENOENT;
 489 }
 490
 491 static int
 492 mesh_select_proto_metric(struct ieee80211vap *vap, const char *name)
 493 {
 494         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 495         int i;
 496
 497         for (i = 0; i < nitems(mesh_proto_metrics); i++) {
 498                 if (strcasecmp(mesh_proto_metrics[i].mpm_descr, name) == 0) {
 499                         ms->ms_pmetric = &mesh_proto_metrics[i];
 500                         return 0;
 501                 }
 502         }
 503         return ENOENT;
 504 }
 505
 506 static void
 507 mesh_gatemode_setup(struct ieee80211vap *vap)
 508 {
 509         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 510
 511         /*
 512          * NB: When a mesh gate is running as a ROOT it shall
 513          * not send out periodic GANNs but instead mark the
 514          * mesh gate flag for the corresponding proactive PREQ
 515          * and RANN frames.
 516          */
 517         if (ms->ms_flags & IEEE80211_MESHFLAGS_ROOT ||
 518             (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) == 0) {
 519                 callout_drain(&ms->ms_gatetimer);
 520                 return ;
 521         }
 522         callout_reset(&ms->ms_gatetimer, ieee80211_mesh_gateint,
 523             mesh_gatemode_cb, vap);
 524 }
 525
 526 static void
 527 mesh_gatemode_cb(void *arg)
 528 {
 529         struct ieee80211vap *vap = (struct ieee80211vap *)arg;
 530         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 531         struct ieee80211_meshgann_ie gann;
 532
 533         gann.gann_flags = 0; /* Reserved */
 534         gann.gann_hopcount = 0;
 535         gann.gann_ttl = ms->ms_ttl;
 536         IEEE80211_ADDR_COPY(gann.gann_addr, vap->iv_myaddr);
 537         gann.gann_seq = ms->ms_gateseq++;
 538         gann.gann_interval = ieee80211_mesh_gateint;
 539
 540         IEEE80211_NOTE(vap, IEEE80211_MSG_MESH, vap->iv_bss,
 541             "send broadcast GANN (seq %u)", gann.gann_seq);
 542
 543         ieee80211_send_action(vap->iv_bss, IEEE80211_ACTION_CAT_MESH,
 544             IEEE80211_ACTION_MESH_GANN, &gann);
 545         mesh_gatemode_setup(vap);
 546 }
 547
 548 static void
 549 ieee80211_mesh_init(void)
 550 {
 551
 552         memset(mesh_proto_paths, 0, sizeof(mesh_proto_paths));
 553         memset(mesh_proto_metrics, 0, sizeof(mesh_proto_metrics));
 554
 555         /*
 556          * Setup mesh parameters that depends on the clock frequency.
 557          */
 558         ieee80211_mesh_gateint = msecs_to_ticks(10000);
 559         ieee80211_mesh_retrytimeout = msecs_to_ticks(40);
 560         ieee80211_mesh_holdingtimeout = msecs_to_ticks(40);
 561         ieee80211_mesh_confirmtimeout = msecs_to_ticks(40);
 562         ieee80211_mesh_backofftimeout = msecs_to_ticks(5000);
 563
 564         /*
 565          * Register action frame handlers.
 566          */
 567         ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
 568             IEEE80211_ACTION_MESHPEERING_OPEN,
 569             mesh_recv_action_meshpeering_open);
 570         ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
 571             IEEE80211_ACTION_MESHPEERING_CONFIRM,
 572             mesh_recv_action_meshpeering_confirm);
 573         ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
 574             IEEE80211_ACTION_MESHPEERING_CLOSE,
 575             mesh_recv_action_meshpeering_close);
 576         ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESH,
 577             IEEE80211_ACTION_MESH_LMETRIC, mesh_recv_action_meshlmetric);
 578         ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESH,
 579             IEEE80211_ACTION_MESH_GANN, mesh_recv_action_meshgate);
 580
 581         ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
 582             IEEE80211_ACTION_MESHPEERING_OPEN,
 583             mesh_send_action_meshpeering_open);
 584         ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
 585             IEEE80211_ACTION_MESHPEERING_CONFIRM,
 586             mesh_send_action_meshpeering_confirm);
 587         ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
 588             IEEE80211_ACTION_MESHPEERING_CLOSE,
 589             mesh_send_action_meshpeering_close);
 590         ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESH,
 591             IEEE80211_ACTION_MESH_LMETRIC,
 592             mesh_send_action_meshlmetric);
 593         ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESH,
 594             IEEE80211_ACTION_MESH_GANN,
 595             mesh_send_action_meshgate);
 596
 597         /*
 598          * Register Airtime Link Metric.
 599          */
 600         ieee80211_mesh_register_proto_metric(&mesh_metric_airtime);
 601
 602 }
 603 SYSINIT(wlan_mesh, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_mesh_init, NULL);
 604
 605 void
 606 ieee80211_mesh_attach(struct ieee80211com *ic)
 607 {
 608         ic->ic_vattach[IEEE80211_M_MBSS] = mesh_vattach;
 609 }
 610
 611 void
 612 ieee80211_mesh_detach(struct ieee80211com *ic)
 613 {
 614 }
 615
 616 static void
 617 mesh_vdetach_peers(void *arg, struct ieee80211_node *ni)
 618 {
 619         struct ieee80211com *ic = ni->ni_ic;
 620         uint16_t args[3];
 621
 622         if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED) {
 623                 args[0] = ni->ni_mlpid;
 624                 args[1] = ni->ni_mllid;
 625                 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
 626                 ieee80211_send_action(ni,
 627                     IEEE80211_ACTION_CAT_SELF_PROT,
 628                     IEEE80211_ACTION_MESHPEERING_CLOSE,
 629                     args);
 630         }
 631         callout_drain(&ni->ni_mltimer);
 632         /* XXX belongs in hwmp */
 633         ieee80211_ageq_drain_node(&ic->ic_stageq,
 634            (void *)(uintptr_t) ieee80211_mac_hash(ic, ni->ni_macaddr));
 635 }
 636
 637 static void
 638 mesh_vdetach(struct ieee80211vap *vap)
 639 {
 640         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 641
 642         callout_drain(&ms->ms_cleantimer);
 643         ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_vdetach_peers,
 644             NULL);
 645         ieee80211_mesh_rt_flush(vap);
 646         MESH_RT_LOCK_DESTROY(ms);
 647         ms->ms_ppath->mpp_vdetach(vap);
 648         IEEE80211_FREE(vap->iv_mesh, M_80211_VAP);
 649         vap->iv_mesh = NULL;
 650 }
 651
 652 static void
 653 mesh_vattach(struct ieee80211vap *vap)
 654 {
 655         struct ieee80211_mesh_state *ms;
 656         vap->iv_newstate = mesh_newstate;
 657         vap->iv_input = mesh_input;
 658         vap->iv_opdetach = mesh_vdetach;
 659         vap->iv_recv_mgmt = mesh_recv_mgmt;
 660         vap->iv_recv_ctl = mesh_recv_ctl;
 661         ms = IEEE80211_MALLOC(sizeof(struct ieee80211_mesh_state), M_80211_VAP,
 662             IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
 663         if (ms == NULL) {
 664                 printf("%s: couldn't alloc MBSS state\n", __func__);
 665                 return;
 666         }
 667         vap->iv_mesh = ms;
 668         ms->ms_seq = 0;
 669         ms->ms_flags = (IEEE80211_MESHFLAGS_AP | IEEE80211_MESHFLAGS_FWD);
 670         ms->ms_ttl = IEEE80211_MESH_DEFAULT_TTL;
 671         TAILQ_INIT(&ms->ms_known_gates);
 672         TAILQ_INIT(&ms->ms_routes);
 673         MESH_RT_LOCK_INIT(ms, "MBSS");
 674         callout_init(&ms->ms_cleantimer, 1);
 675         callout_init(&ms->ms_gatetimer, 1);
 676         ms->ms_gateseq = 0;
 677         mesh_select_proto_metric(vap, "AIRTIME");
 678         KASSERT(ms->ms_pmetric, ("ms_pmetric == NULL"));
 679         mesh_select_proto_path(vap, "HWMP");
 680         KASSERT(ms->ms_ppath, ("ms_ppath == NULL"));
 681         ms->ms_ppath->mpp_vattach(vap);
 682 }
 683
 684 /*
 685  * IEEE80211_M_MBSS vap state machine handler.
 686  */
 687 static int
 688 mesh_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
 689 {
 690         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 691         struct ieee80211com *ic = vap->iv_ic;
 692         struct ieee80211_node *ni;
 693         enum ieee80211_state ostate;
 694
 695         IEEE80211_LOCK_ASSERT(ic);
 696
 697         ostate = vap->iv_state;
 698         IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n",
 699             __func__, ieee80211_state_name[ostate],
 700             ieee80211_state_name[nstate], arg);
 701         vap->iv_state = nstate;         /* state transition */
 702         if (ostate != IEEE80211_S_SCAN)
 703                 ieee80211_cancel_scan(vap);     /* background scan */
 704         ni = vap->iv_bss;                       /* NB: no reference held */
 705         if (nstate != IEEE80211_S_RUN && ostate == IEEE80211_S_RUN) {
 706                 callout_drain(&ms->ms_cleantimer);
 707                 callout_drain(&ms->ms_gatetimer);
 708         }
 709         switch (nstate) {
 710         case IEEE80211_S_INIT:
 711                 switch (ostate) {
 712                 case IEEE80211_S_SCAN:
 713                         ieee80211_cancel_scan(vap);
 714                         break;
 715                 case IEEE80211_S_CAC:
 716                         ieee80211_dfs_cac_stop(vap);
 717                         break;
 718                 case IEEE80211_S_RUN:
 719                         ieee80211_iterate_nodes(&ic->ic_sta,
 720                             mesh_vdetach_peers, NULL);
 721                         break;
 722                 default:
 723                         break;
 724                 }
 725                 if (ostate != IEEE80211_S_INIT) {
 726                         /* NB: optimize INIT -> INIT case */
 727                         ieee80211_reset_bss(vap);
 728                         ieee80211_mesh_rt_flush(vap);
 729                 }
 730                 break;
 731         case IEEE80211_S_SCAN:
 732                 switch (ostate) {
 733                 case IEEE80211_S_INIT:
 734                         if (vap->iv_des_chan != IEEE80211_CHAN_ANYC &&
 735                             !IEEE80211_IS_CHAN_RADAR(vap->iv_des_chan) &&
 736                             ms->ms_idlen != 0) {
 737                                 /*
 738                                  * Already have a channel and a mesh ID; bypass
 739                                  * the scan and startup immediately.
 740                                  */
 741                                 ieee80211_create_ibss(vap, vap->iv_des_chan);
 742                                 break;
 743                         }
 744                         /*
 745                          * Initiate a scan.  We can come here as a result
 746                          * of an IEEE80211_IOC_SCAN_REQ too in which case
 747                          * the vap will be marked with IEEE80211_FEXT_SCANREQ
 748                          * and the scan request parameters will be present
 749                          * in iv_scanreq.  Otherwise we do the default.
 750                         */
 751                         if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) {
 752                                 ieee80211_check_scan(vap,
 753                                     vap->iv_scanreq_flags,
 754                                     vap->iv_scanreq_duration,
 755                                     vap->iv_scanreq_mindwell,
 756                                     vap->iv_scanreq_maxdwell,
 757                                     vap->iv_scanreq_nssid, vap->iv_scanreq_ssid);
 758                                 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ;
 759                         } else
 760                                 ieee80211_check_scan_current(vap);
 761                         break;
 762                 default:
 763                         break;
 764                 }
 765                 break;
 766         case IEEE80211_S_CAC:
 767                 /*
 768                  * Start CAC on a DFS channel.  We come here when starting
 769                  * a bss on a DFS channel (see ieee80211_create_ibss).
 770                  */
 771                 ieee80211_dfs_cac_start(vap);
 772                 break;
 773         case IEEE80211_S_RUN:
 774                 switch (ostate) {
 775                 case IEEE80211_S_INIT:
 776                         /*
 777                          * Already have a channel; bypass the
 778                          * scan and startup immediately.
 779                          * Note that ieee80211_create_ibss will call
 780                          * back to do a RUN->RUN state change.
 781                          */
 782                         ieee80211_create_ibss(vap,
 783                             ieee80211_ht_adjust_channel(ic,
 784                                 ic->ic_curchan, vap->iv_flags_ht));
 785                         /* NB: iv_bss is changed on return */
 786                         break;
 787                 case IEEE80211_S_CAC:
 788                         /*
 789                          * NB: This is the normal state change when CAC
 790                          * expires and no radar was detected; no need to
 791                          * clear the CAC timer as it's already expired.
 792                          */
 793                         /* fall thru... */
 794                 case IEEE80211_S_CSA:
 795 #if 0
 796                         /*
 797                          * Shorten inactivity timer of associated stations
 798                          * to weed out sta's that don't follow a CSA.
 799                          */
 800                         ieee80211_iterate_nodes(&ic->ic_sta, sta_csa, vap);
 801 #endif
 802                         /*
 803                          * Update bss node channel to reflect where
 804                          * we landed after CSA.
 805                          */
 806                         ieee80211_node_set_chan(ni,
 807                             ieee80211_ht_adjust_channel(ic, ic->ic_curchan,
 808                                 ieee80211_htchanflags(ni->ni_chan)));
 809                         /* XXX bypass debug msgs */
 810                         break;
 811                 case IEEE80211_S_SCAN:
 812                 case IEEE80211_S_RUN:
 813 #ifdef IEEE80211_DEBUG
 814                         if (ieee80211_msg_debug(vap)) {
 815                                 ieee80211_note(vap,
 816                                     "synchronized with %s meshid ",
 817                                     ether_sprintf(ni->ni_meshid));
 818                                 ieee80211_print_essid(ni->ni_meshid,
 819                                     ni->ni_meshidlen);
 820                                 /* XXX MCS/HT */
 821                                 printf(" channel %d\n",
 822                                     ieee80211_chan2ieee(ic, ic->ic_curchan));
 823                         }
 824 #endif
 825                         break;
 826                 default:
 827                         break;
 828                 }
 829                 ieee80211_node_authorize(ni);
 830                 callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact,
 831                     mesh_rt_cleanup_cb, vap);
 832                 mesh_gatemode_setup(vap);
 833                 break;
 834         default:
 835                 break;
 836         }
 837         /* NB: ostate not nstate */
 838         ms->ms_ppath->mpp_newstate(vap, ostate, arg);
 839         return 0;
 840 }
 841
 842 static void
 843 mesh_rt_cleanup_cb(void *arg)
 844 {
 845         struct ieee80211vap *vap = arg;
 846         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 847
 848         mesh_rt_flush_invalid(vap);
 849         callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact,
 850             mesh_rt_cleanup_cb, vap);
 851 }
 852
 853 /*
 854  * Mark a mesh STA as gate and return a pointer to it.
 855  * If this is first time, we create a new gate route.
 856  * Always update the path route to this mesh gate.
 857  */
 858 struct ieee80211_mesh_gate_route *
 859 ieee80211_mesh_mark_gate(struct ieee80211vap *vap, const uint8_t *addr,
 860     struct ieee80211_mesh_route *rt)
 861 {
 862         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 863         struct ieee80211_mesh_gate_route *gr = NULL, *next;
 864         int found = 0;
 865
 866         MESH_RT_LOCK(ms);
 867         TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) {
 868                 if (IEEE80211_ADDR_EQ(gr->gr_addr, addr)) {
 869                         found = 1;
 870                         break;
 871                 }
 872         }
 873
 874         if (!found) {
 875                 /* New mesh gate add it to known table. */
 876                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, addr,
 877                     "%s", "stored new gate information from pro-PREQ.");
 878                 gr = IEEE80211_MALLOC(ALIGN(sizeof(struct ieee80211_mesh_gate_route)),
 879                     M_80211_MESH_GT_RT,
 880                     IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
 881                 IEEE80211_ADDR_COPY(gr->gr_addr, addr);
 882                 TAILQ_INSERT_TAIL(&ms->ms_known_gates, gr, gr_next);
 883         }
 884         gr->gr_route = rt;
 885         /* TODO: link from path route to gate route */
 886         MESH_RT_UNLOCK(ms);
 887
 888         return gr;
 889 }
 890
 891
 892 /*
 893  * Helper function to note the Mesh Peer Link FSM change.
 894  */
 895 static void
 896 mesh_linkchange(struct ieee80211_node *ni, enum ieee80211_mesh_mlstate state)
 897 {
 898         struct ieee80211vap *vap = ni->ni_vap;
 899         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 900 #ifdef IEEE80211_DEBUG
 901         static const char *meshlinkstates[] = {
 902                 [IEEE80211_NODE_MESH_IDLE]              = "IDLE",
 903                 [IEEE80211_NODE_MESH_OPENSNT]           = "OPEN SENT",
 904                 [IEEE80211_NODE_MESH_OPENRCV]           = "OPEN RECEIVED",
 905                 [IEEE80211_NODE_MESH_CONFIRMRCV]        = "CONFIRM RECEIVED",
 906                 [IEEE80211_NODE_MESH_ESTABLISHED]       = "ESTABLISHED",
 907                 [IEEE80211_NODE_MESH_HOLDING]           = "HOLDING"
 908         };
 909 #endif
 910         IEEE80211_NOTE(vap, IEEE80211_MSG_MESH,
 911             ni, "peer link: %s -> %s",
 912             meshlinkstates[ni->ni_mlstate], meshlinkstates[state]);
 913
 914         /* track neighbor count */
 915         if (state == IEEE80211_NODE_MESH_ESTABLISHED &&
 916             ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) {
 917                 KASSERT(ms->ms_neighbors < 65535, ("neighbor count overflow"));
 918                 ms->ms_neighbors++;
 919                 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF);
 920         } else if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED &&
 921             state != IEEE80211_NODE_MESH_ESTABLISHED) {
 922                 KASSERT(ms->ms_neighbors > 0, ("neighbor count 0"));
 923                 ms->ms_neighbors--;
 924                 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF);
 925         }
 926         ni->ni_mlstate = state;
 927         switch (state) {
 928         case IEEE80211_NODE_MESH_HOLDING:
 929                 ms->ms_ppath->mpp_peerdown(ni);
 930                 break;
 931         case IEEE80211_NODE_MESH_ESTABLISHED:
 932                 ieee80211_mesh_discover(vap, ni->ni_macaddr, NULL);
 933                 break;
 934         default:
 935                 break;
 936         }
 937 }
 938
 939 /*
 940  * Helper function to generate a unique local ID required for mesh
 941  * peer establishment.
 942  */
 943 static void
 944 mesh_checkid(void *arg, struct ieee80211_node *ni)
 945 {
 946         uint16_t *r = arg;
 947
 948         if (*r == ni->ni_mllid)
 949                 *(uint16_t *)arg = 0;
 950 }
 951
 952 static uint32_t
 953 mesh_generateid(struct ieee80211vap *vap)
 954 {
 955         int maxiter = 4;
 956         uint16_t r;
 957
 958         do {
 959                 get_random_bytes(&r, 2);
 960                 ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_checkid, &r);
 961                 maxiter--;
 962         } while (r == 0 && maxiter > 0);
 963         return r;
 964 }
 965
 966 /*
 967  * Verifies if we already received this packet by checking its
 968  * sequence number.
 969  * Returns 0 if the frame is to be accepted, 1 otherwise.
 970  */
 971 static int
 972 mesh_checkpseq(struct ieee80211vap *vap,
 973     const uint8_t source[IEEE80211_ADDR_LEN], uint32_t seq)
 974 {
 975         struct ieee80211_mesh_route *rt;
 976
 977         rt = ieee80211_mesh_rt_find(vap, source);
 978         if (rt == NULL) {
 979                 rt = ieee80211_mesh_rt_add(vap, source);
 980                 if (rt == NULL) {
 981                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source,
 982                             "%s", "add mcast route failed");
 983                         vap->iv_stats.is_mesh_rtaddfailed++;
 984                         return 1;
 985                 }
 986                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source,
 987                     "add mcast route, mesh seqno %d", seq);
 988                 rt->rt_lastmseq = seq;
 989                 return 0;
 990         }
 991         if (IEEE80211_MESH_SEQ_GEQ(rt->rt_lastmseq, seq)) {
 992                 return 1;
 993         } else {
 994                 rt->rt_lastmseq = seq;
 995                 return 0;
 996         }
 997 }
 998
 999 /*
1000  * Iterate the routing table and locate the next hop.
1001  */
1002 struct ieee80211_node *
1003 ieee80211_mesh_find_txnode(struct ieee80211vap *vap,
1004     const uint8_t dest[IEEE80211_ADDR_LEN])
1005 {
1006         struct ieee80211_mesh_route *rt;
1007
1008         rt = ieee80211_mesh_rt_find(vap, dest);
1009         if (rt == NULL)
1010                 return NULL;
1011         if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) {
1012                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
1013                     "%s: !valid, flags 0x%x", __func__, rt->rt_flags);
1014                 /* XXX stat */
1015                 return NULL;
1016         }
1017         if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) {
1018                 rt = ieee80211_mesh_rt_find(vap, rt->rt_mesh_gate);
1019                 if (rt == NULL) return NULL;
1020                 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) {
1021                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
1022                             "%s: meshgate !valid, flags 0x%x", __func__,
1023                             rt->rt_flags);
1024                         /* XXX stat */
1025                         return NULL;
1026                 }
1027         }
1028         return ieee80211_find_txnode(vap, rt->rt_nexthop);
1029 }
1030
1031 static void
1032 mesh_transmit_to_gate(struct ieee80211vap *vap, struct mbuf *m,
1033     struct ieee80211_mesh_route *rt_gate)
1034 {
1035         struct ifnet *ifp = vap->iv_ifp;
1036         struct ieee80211_node *ni;
1037
1038         IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
1039
1040         ni = ieee80211_mesh_find_txnode(vap, rt_gate->rt_dest);
1041         if (ni == NULL) {
1042                 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
1043                 m_freem(m);
1044                 return;
1045         }
1046
1047         /*
1048          * Send through the VAP packet transmit path.
1049          * This consumes the node ref grabbed above and
1050          * the mbuf, regardless of whether there's a problem
1051          * or not.
1052          */
1053         (void) ieee80211_vap_pkt_send_dest(vap, m, ni);
1054 }
1055
1056 /*
1057  * Forward the queued frames to known valid mesh gates.
1058  * Assume destination to be outside the MBSS (i.e. proxy entry),
1059  * If no valid mesh gates are known silently discard queued frames.
1060  * After transmitting frames to all known valid mesh gates, this route
1061  * will be marked invalid, and a new path discovery will happen in the hopes
1062  * that (at least) one of the mesh gates have a new proxy entry for us to use.
1063  */
1064 void
1065 ieee80211_mesh_forward_to_gates(struct ieee80211vap *vap,
1066     struct ieee80211_mesh_route *rt_dest)
1067 {
1068         struct ieee80211com *ic = vap->iv_ic;
1069         struct ieee80211_mesh_state *ms = vap->iv_mesh;
1070         struct ieee80211_mesh_route *rt_gate;
1071         struct ieee80211_mesh_gate_route *gr = NULL, *gr_next;
1072         struct mbuf *m, *mcopy, *next;
1073
1074         IEEE80211_TX_UNLOCK_ASSERT(ic);
1075
1076         KASSERT( rt_dest->rt_flags == IEEE80211_MESHRT_FLAGS_DISCOVER,
1077             ("Route is not marked with IEEE80211_MESHRT_FLAGS_DISCOVER"));
1078
1079         /* XXX: send to more than one valid mash gate */
1080         MESH_RT_LOCK(ms);
1081
1082         m = ieee80211_ageq_remove(&ic->ic_stageq,
1083             (struct ieee80211_node *)(uintptr_t)
1084             ieee80211_mac_hash(ic, rt_dest->rt_dest));
1085
1086         TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, gr_next) {
1087                 rt_gate = gr->gr_route;
1088                 if (rt_gate == NULL) {
1089                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP,
1090                                 rt_dest->rt_dest,
1091                                 "mesh gate with no path %6D",
1092                                 gr->gr_addr, ":");
1093                         continue;
1094                 }
1095                 if ((rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0)
1096                         continue;
1097                 KASSERT(rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_GATE,
1098                     ("route not marked as a mesh gate"));
1099                 KASSERT((rt_gate->rt_flags &
1100                         IEEE80211_MESHRT_FLAGS_PROXY) == 0,
1101                         ("found mesh gate that is also marked porxy"));
1102                 /*
1103                  * convert route to a proxy route gated by the current
1104                  * mesh gate, this is needed so encap can built data
1105                  * frame with correct address.
1106                  */
1107                 rt_dest->rt_flags = IEEE80211_MESHRT_FLAGS_PROXY |
1108                         IEEE80211_MESHRT_FLAGS_VALID;
1109                 rt_dest->rt_ext_seq = 1; /* random value */
1110                 IEEE80211_ADDR_COPY(rt_dest->rt_mesh_gate, rt_gate->rt_dest);
1111                 IEEE80211_ADDR_COPY(rt_dest->rt_nexthop, rt_gate->rt_nexthop);
1112                 rt_dest->rt_metric = rt_gate->rt_metric;
1113                 rt_dest->rt_nhops = rt_gate->rt_nhops;
1114                 ieee80211_mesh_rt_update(rt_dest, ms->ms_ppath->mpp_inact);
1115                 MESH_RT_UNLOCK(ms);
1116                 /* XXX: lock?? */
1117                 mcopy = m_dup(m, M_NOWAIT);
1118                 for (; mcopy != NULL; mcopy = next) {
1119                         next = mcopy->m_nextpkt;
1120                         mcopy->m_nextpkt = NULL;
1121                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP,
1122                             rt_dest->rt_dest,
1123                             "flush queued frame %p len %d", mcopy,
1124                             mcopy->m_pkthdr.len);
1125                         mesh_transmit_to_gate(vap, mcopy, rt_gate);
1126                 }
1127                 MESH_RT_LOCK(ms);
1128         }
1129         rt_dest->rt_flags = 0; /* Mark invalid */
1130         m_freem(m);
1131         MESH_RT_UNLOCK(ms);
1132 }
1133
1134 /*
1135  * Forward the specified frame.
1136  * Decrement the TTL and set TA to our MAC address.
1137  */
1138 static void
1139 mesh_forward(struct ieee80211vap *vap, struct mbuf *m,
1140     const struct ieee80211_meshcntl *mc)
1141 {
1142         struct ieee80211com *ic = vap->iv_ic;
1143         struct ieee80211_mesh_state *ms = vap->iv_mesh;
1144         struct ifnet *ifp = vap->iv_ifp;
1145         const struct ieee80211_frame *wh =
1146             mtod(m, const struct ieee80211_frame *);
1147         struct mbuf *mcopy;
1148         struct ieee80211_meshcntl *mccopy;
1149         struct ieee80211_frame *whcopy;
1150         struct ieee80211_node *ni;
1151         int err;
1152
1153         /* This is called from the RX path - don't hold this lock */
1154         IEEE80211_TX_UNLOCK_ASSERT(ic);
1155
1156         /*
1157          * mesh ttl of 1 means we are the last one receiving it,
1158          * according to amendment we decrement and then check if
1159          * 0, if so we dont forward.
1160          */
1161         if (mc->mc_ttl < 1) {
1162                 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1163                     "%s", "frame not fwd'd, ttl 1");
1164                 vap->iv_stats.is_mesh_fwd_ttl++;
1165                 return;
1166         }
1167         if (!(ms->ms_flags & IEEE80211_MESHFLAGS_FWD)) {
1168                 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1169                     "%s", "frame not fwd'd, fwding disabled");
1170                 vap->iv_stats.is_mesh_fwd_disabled++;
1171                 return;
1172         }
1173         mcopy = m_dup(m, M_NOWAIT);
1174         if (mcopy == NULL) {
1175                 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1176                     "%s", "frame not fwd'd, cannot dup");
1177                 vap->iv_stats.is_mesh_fwd_nobuf++;
1178                 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
1179                 return;
1180         }
1181         mcopy = m_pullup(mcopy, ieee80211_hdrspace(ic, wh) +
1182             sizeof(struct ieee80211_meshcntl));
1183         if (mcopy == NULL) {
1184                 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1185                     "%s", "frame not fwd'd, too short");
1186                 vap->iv_stats.is_mesh_fwd_tooshort++;
1187                 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
1188                 m_freem(mcopy);
1189                 return;
1190         }
1191         whcopy = mtod(mcopy, struct ieee80211_frame *);
1192         mccopy = (struct ieee80211_meshcntl *)
1193             (mtod(mcopy, uint8_t *) + ieee80211_hdrspace(ic, wh));
1194         /* XXX clear other bits? */
1195         whcopy->i_fc[1] &= ~IEEE80211_FC1_RETRY;
1196         IEEE80211_ADDR_COPY(whcopy->i_addr2, vap->iv_myaddr);
1197         if (IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1198                 ni = ieee80211_ref_node(vap->iv_bss);
1199                 mcopy->m_flags |= M_MCAST;
1200         } else {
1201                 ni = ieee80211_mesh_find_txnode(vap, whcopy->i_addr3);
1202                 if (ni == NULL) {
1203                         /*
1204                          * [Optional] any of the following three actions:
1205                          * o silently discard
1206                          * o trigger a path discovery
1207                          * o inform TA that meshDA is unknown.
1208                          */
1209                         IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1210                             "%s", "frame not fwd'd, no path");
1211                         ms->ms_ppath->mpp_senderror(vap, whcopy->i_addr3, NULL,
1212                             IEEE80211_REASON_MESH_PERR_NO_FI);
1213                         vap->iv_stats.is_mesh_fwd_nopath++;
1214                         m_freem(mcopy);
1215                         return;
1216                 }
1217                 IEEE80211_ADDR_COPY(whcopy->i_addr1, ni->ni_macaddr);
1218         }
1219         KASSERT(mccopy->mc_ttl > 0, ("%s called with wrong ttl", __func__));
1220         mccopy->mc_ttl--;
1221
1222         /* XXX calculate priority so drivers can find the tx queue */
1223         M_WME_SETAC(mcopy, WME_AC_BE);
1224
1225         /* XXX do we know m_nextpkt is NULL? */
1226         mcopy->m_pkthdr.rcvif = (void *) ni;
1227
1228         /*
1229          * XXX this bypasses all of the VAP TX handling; it passes frames
1230          * directly to the parent interface.
1231          *
1232          * Because of this, there's no TX lock being held as there's no
1233          * encaps state being used.
1234          *
1235          * Doing a direct parent transmit may not be the correct thing
1236          * to do here; we'll have to re-think this soon.
1237          */
1238         IEEE80211_TX_LOCK(ic);
1239         err = ieee80211_parent_xmitpkt(ic, mcopy);
1240         IEEE80211_TX_UNLOCK(ic);
1241         if (!err)
1242                 if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1);
1243 }
1244
1245 static struct mbuf *
1246 mesh_decap(struct ieee80211vap *vap, struct mbuf *m, int hdrlen, int meshdrlen)
1247 {
1248 #define WHDIR(wh)       ((wh)->i_fc[1] & IEEE80211_FC1_DIR_MASK)
1249 #define MC01(mc)        ((const struct ieee80211_meshcntl_ae01 *)mc)
1250         uint8_t b[sizeof(struct ieee80211_qosframe_addr4) +
1251                   sizeof(struct ieee80211_meshcntl_ae10)];
1252         const struct ieee80211_qosframe_addr4 *wh;
1253         const struct ieee80211_meshcntl_ae10 *mc;
1254         struct ether_header *eh;
1255         struct llc *llc;
1256         int ae;
1257
1258         if (m->m_len < hdrlen + sizeof(*llc) &&
1259             (m = m_pullup(m, hdrlen + sizeof(*llc))) == NULL) {
1260                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ANY,
1261                     "discard data frame: %s", "m_pullup failed");
1262                 vap->iv_stats.is_rx_tooshort++;
1263                 return NULL;
1264         }
1265         memcpy(b, mtod(m, caddr_t), hdrlen);
1266         wh = (const struct ieee80211_qosframe_addr4 *)&b[0];
1267         mc = (const struct ieee80211_meshcntl_ae10 *)&b[hdrlen - meshdrlen];
1268         KASSERT(WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS ||
1269                 WHDIR(wh) == IEEE80211_FC1_DIR_DSTODS,
1270             ("bogus dir, fc 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1]));
1271
1272         llc = (struct llc *)(mtod(m, caddr_t) + hdrlen);
1273         if (llc->llc_dsap == LLC_SNAP_LSAP && llc->llc_ssap == LLC_SNAP_LSAP &&
1274             llc->llc_control == LLC_UI && llc->llc_snap.org_code[0] == 0 &&
1275             llc->llc_snap.org_code[1] == 0 && llc->llc_snap.org_code[2] == 0 &&
1276             /* NB: preserve AppleTalk frames that have a native SNAP hdr */
1277             !(llc->llc_snap.ether_type == htons(ETHERTYPE_AARP) ||
1278               llc->llc_snap.ether_type == htons(ETHERTYPE_IPX))) {
1279                 m_adj(m, hdrlen + sizeof(struct llc) - sizeof(*eh));
1280                 llc = NULL;
1281         } else {
1282                 m_adj(m, hdrlen - sizeof(*eh));
1283         }
1284         eh = mtod(m, struct ether_header *);
1285         ae = mc->mc_flags & IEEE80211_MESH_AE_MASK;
1286         if (WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS) {
1287                 IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr1);
1288                 if (ae == IEEE80211_MESH_AE_00) {
1289                         IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr3);
1290                 } else if (ae == IEEE80211_MESH_AE_01) {
1291                         IEEE80211_ADDR_COPY(eh->ether_shost,
1292                             MC01(mc)->mc_addr4);
1293                 } else {
1294                         IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1295                             (const struct ieee80211_frame *)wh, NULL,
1296                             "bad AE %d", ae);
1297                         vap->iv_stats.is_mesh_badae++;
1298                         m_freem(m);
1299                         return NULL;
1300                 }
1301         } else {
1302                 if (ae == IEEE80211_MESH_AE_00) {
1303                         IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr3);
1304                         IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr4);
1305                 } else if (ae == IEEE80211_MESH_AE_10) {
1306                         IEEE80211_ADDR_COPY(eh->ether_dhost, mc->mc_addr5);
1307                         IEEE80211_ADDR_COPY(eh->ether_shost, mc->mc_addr6);
1308                 } else {
1309                         IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1310                             (const struct ieee80211_frame *)wh, NULL,
1311                             "bad AE %d", ae);
1312                         vap->iv_stats.is_mesh_badae++;
1313                         m_freem(m);
1314                         return NULL;
1315                 }
1316         }
1317 #ifndef __NO_STRICT_ALIGNMENT
1318         if (!ALIGNED_POINTER(mtod(m, caddr_t) + sizeof(*eh), uint32_t)) {
1319                 m = ieee80211_realign(vap, m, sizeof(*eh));
1320                 if (m == NULL)
1321                         return NULL;
1322         }
1323 #endif /* !__NO_STRICT_ALIGNMENT */
1324         if (llc != NULL) {
1325                 eh = mtod(m, struct ether_header *);
1326                 eh->ether_type = htons(m->m_pkthdr.len - sizeof(*eh));
1327         }
1328         return m;
1329 #undef  WDIR
1330 #undef  MC01
1331 }
1332
1333 /*
1334  * Return non-zero if the unicast mesh data frame should be processed
1335  * locally.  Frames that are not proxy'd have our address, otherwise
1336  * we need to consult the routing table to look for a proxy entry.
1337  */
1338 static __inline int
1339 mesh_isucastforme(struct ieee80211vap *vap, const struct ieee80211_frame *wh,
1340     const struct ieee80211_meshcntl *mc)
1341 {
1342         int ae = mc->mc_flags & 3;
1343
1344         KASSERT((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) == IEEE80211_FC1_DIR_DSTODS,
1345             ("bad dir 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1]));
1346         KASSERT(ae == IEEE80211_MESH_AE_00 || ae == IEEE80211_MESH_AE_10,
1347             ("bad AE %d", ae));
1348         if (ae == IEEE80211_MESH_AE_10) {       /* ucast w/ proxy */
1349                 const struct ieee80211_meshcntl_ae10 *mc10 =
1350                     (const struct ieee80211_meshcntl_ae10 *) mc;
1351                 struct ieee80211_mesh_route *rt =
1352                     ieee80211_mesh_rt_find(vap, mc10->mc_addr5);
1353                 /* check for proxy route to ourself */
1354                 return (rt != NULL &&
1355                     (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY));
1356         } else                                  /* ucast w/o proxy */
1357                 return IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_myaddr);
1358 }
1359
1360 /*
1361  * Verifies transmitter, updates lifetime, precursor list and forwards data.
1362  * > 0 means we have forwarded data and no need to process locally
1363  * == 0 means we want to process locally (and we may have forwarded data
1364  * < 0 means there was an error and data should be discarded
1365  */
1366 static int
1367 mesh_recv_indiv_data_to_fwrd(struct ieee80211vap *vap, struct mbuf *m,
1368     struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc)
1369 {
1370         struct ieee80211_qosframe_addr4 *qwh;
1371         struct ieee80211_mesh_state *ms = vap->iv_mesh;
1372         struct ieee80211_mesh_route *rt_meshda, *rt_meshsa;
1373
1374         /* This is called from the RX path - don't hold this lock */
1375         IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
1376
1377         qwh = (struct ieee80211_qosframe_addr4 *)wh;
1378
1379         /*
1380          * TODO:
1381          * o verify addr2 is  a legitimate transmitter
1382          * o lifetime of precursor of addr3 (addr2) is max(init, curr)
1383          * o lifetime of precursor of addr4 (nexthop) is max(init, curr)
1384          */
1385
1386         /* set lifetime of addr3 (meshDA) to initial value */
1387         rt_meshda = ieee80211_mesh_rt_find(vap, qwh->i_addr3);
1388         if (rt_meshda == NULL) {
1389                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, qwh->i_addr2,
1390                     "no route to meshDA(%6D)", qwh->i_addr3, ":");
1391                 /*
1392                  * [Optional] any of the following three actions:
1393                  * o silently discard                           [X]
1394                  * o trigger a path discovery                   [ ]
1395                  * o inform TA that meshDA is unknown.          [ ]
1396                  */
1397                 /* XXX: stats */
1398                 return (-1);
1399         }
1400
1401         ieee80211_mesh_rt_update(rt_meshda, ticks_to_msecs(
1402             ms->ms_ppath->mpp_inact));
1403
1404         /* set lifetime of addr4 (meshSA) to initial value */
1405         rt_meshsa = ieee80211_mesh_rt_find(vap, qwh->i_addr4);
1406         KASSERT(rt_meshsa != NULL, ("no route"));
1407         ieee80211_mesh_rt_update(rt_meshsa, ticks_to_msecs(
1408             ms->ms_ppath->mpp_inact));
1409
1410         mesh_forward(vap, m, mc);
1411         return (1); /* dont process locally */
1412 }
1413
1414 /*
1415  * Verifies transmitter, updates lifetime, precursor list and process data
1416  * locally, if data is proxy with AE = 10 it could mean data should go
1417  * on another mesh path or data should be forwarded to the DS.
1418  *
1419  * > 0 means we have forwarded data and no need to process locally
1420  * == 0 means we want to process locally (and we may have forwarded data
1421  * < 0 means there was an error and data should be discarded
1422  */
1423 static int
1424 mesh_recv_indiv_data_to_me(struct ieee80211vap *vap, struct mbuf *m,
1425     struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc)
1426 {
1427         struct ieee80211_qosframe_addr4 *qwh;
1428         const struct ieee80211_meshcntl_ae10 *mc10;
1429         struct ieee80211_mesh_state *ms = vap->iv_mesh;
1430         struct ieee80211_mesh_route *rt;
1431         int ae;
1432
1433         /* This is called from the RX path - don't hold this lock */
1434         IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
1435
1436         qwh = (struct ieee80211_qosframe_addr4 *)wh;
1437         mc10 = (const struct ieee80211_meshcntl_ae10 *)mc;
1438
1439         /*
1440          * TODO:
1441          * o verify addr2 is  a legitimate transmitter
1442          * o lifetime of precursor entry is max(init, curr)
1443          */
1444
1445         /* set lifetime of addr4 (meshSA) to initial value */
1446         rt = ieee80211_mesh_rt_find(vap, qwh->i_addr4);
1447         KASSERT(rt != NULL, ("no route"));
1448         ieee80211_mesh_rt_update(rt, ticks_to_msecs(ms->ms_ppath->mpp_inact));
1449         rt = NULL;
1450
1451         ae = mc10->mc_flags & IEEE80211_MESH_AE_MASK;
1452         KASSERT(ae == IEEE80211_MESH_AE_00 ||
1453             ae == IEEE80211_MESH_AE_10, ("bad AE %d", ae));
1454         if (ae == IEEE80211_MESH_AE_10) {
1455                 if (IEEE80211_ADDR_EQ(mc10->mc_addr5, qwh->i_addr3)) {
1456                         return (0); /* process locally */
1457                 }
1458
1459                 rt =  ieee80211_mesh_rt_find(vap, mc10->mc_addr5);
1460                 if (rt != NULL &&
1461                     (rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) &&
1462                     (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) == 0) {
1463                         /*
1464                          * Forward on another mesh-path, according to
1465                          * amendment as specified in 9.32.4.1
1466                          */
1467                         IEEE80211_ADDR_COPY(qwh->i_addr3, mc10->mc_addr5);
1468                         mesh_forward(vap, m,
1469                             (const struct ieee80211_meshcntl *)mc10);
1470                         return (1); /* dont process locally */
1471                 }
1472                 /*
1473                  * All other cases: forward of MSDUs from the MBSS to DS indiv.
1474                  * addressed according to 13.11.3.2.
1475                  */
1476                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, qwh->i_addr2,
1477                     "forward frame to DS, SA(%6D) DA(%6D)",
1478                     mc10->mc_addr6, ":", mc10->mc_addr5, ":");
1479         }
1480         return (0); /* process locally */
1481 }
1482
1483 /*
1484  * Try to forward the group addressed data on to other mesh STAs, and
1485  * also to the DS.
1486  *
1487  * > 0 means we have forwarded data and no need to process locally
1488  * == 0 means we want to process locally (and we may have forwarded data
1489  * < 0 means there was an error and data should be discarded
1490  */
1491 static int
1492 mesh_recv_group_data(struct ieee80211vap *vap, struct mbuf *m,
1493     struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc)
1494 {
1495 #define MC01(mc)        ((const struct ieee80211_meshcntl_ae01 *)mc)
1496         struct ieee80211_mesh_state *ms = vap->iv_mesh;
1497
1498         /* This is called from the RX path - don't hold this lock */
1499         IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
1500
1501         mesh_forward(vap, m, mc);
1502
1503         if(mc->mc_ttl > 0) {
1504                 if (mc->mc_flags & IEEE80211_MESH_AE_01) {
1505                         /*
1506                          * Forward of MSDUs from the MBSS to DS group addressed
1507                          * (according to 13.11.3.2)
1508                          * This happens by delivering the packet, and a bridge
1509                          * will sent it on another port member.
1510                          */
1511                         if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE &&
1512                             ms->ms_flags & IEEE80211_MESHFLAGS_FWD) {
1513                                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH,
1514                                     MC01(mc)->mc_addr4, "%s",
1515                                     "forward from MBSS to the DS");
1516                         }
1517                 }
1518         }
1519         return (0); /* process locally */
1520 #undef  MC01
1521 }
1522
1523 static int
1524 mesh_input(struct ieee80211_node *ni, struct mbuf *m,
1525     const struct ieee80211_rx_stats *rxs, int rssi, int nf)
1526 {
1527 #define HAS_SEQ(type)   ((type & 0x4) == 0)
1528 #define MC01(mc)        ((const struct ieee80211_meshcntl_ae01 *)mc)
1529         struct ieee80211vap *vap = ni->ni_vap;
1530         struct ieee80211com *ic = ni->ni_ic;
1531         struct ifnet *ifp = vap->iv_ifp;
1532         struct ieee80211_frame *wh;
1533         const struct ieee80211_meshcntl *mc;
1534         int hdrspace, meshdrlen, need_tap, error;
1535         uint8_t dir, type, subtype, ae;
1536         uint32_t seq;
1537         const uint8_t *addr;
1538         uint8_t qos[2];
1539
1540         KASSERT(ni != NULL, ("null node"));
1541         ni->ni_inact = ni->ni_inact_reload;
1542
1543         need_tap = 1;                   /* mbuf need to be tapped. */
1544         type = -1;                      /* undefined */
1545
1546         /* This is called from the RX path - don't hold this lock */
1547         IEEE80211_TX_UNLOCK_ASSERT(ic);
1548
1549         if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) {
1550                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1551                     ni->ni_macaddr, NULL,
1552                     "too short (1): len %u", m->m_pkthdr.len);
1553                 vap->iv_stats.is_rx_tooshort++;
1554                 goto out;
1555         }
1556         /*
1557          * Bit of a cheat here, we use a pointer for a 3-address
1558          * frame format but don't reference fields past outside
1559          * ieee80211_frame_min w/o first validating the data is
1560          * present.
1561         */
1562         wh = mtod(m, struct ieee80211_frame *);
1563
1564         if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) !=
1565             IEEE80211_FC0_VERSION_0) {
1566                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1567                     ni->ni_macaddr, NULL, "wrong version %x", wh->i_fc[0]);
1568                 vap->iv_stats.is_rx_badversion++;
1569                 goto err;
1570         }
1571         dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK;
1572         type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK;
1573         subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK;
1574         if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) {
1575                 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi);
1576                 ni->ni_noise = nf;
1577                 if (HAS_SEQ(type)) {
1578                         uint8_t tid = ieee80211_gettid(wh);
1579
1580                         if (IEEE80211_QOS_HAS_SEQ(wh) &&
1581                             TID_TO_WME_AC(tid) >= WME_AC_VI)
1582                                 ic->ic_wme.wme_hipri_traffic++;
1583                         if (! ieee80211_check_rxseq(ni, wh, wh->i_addr1))
1584                                 goto out;
1585                 }
1586         }
1587 #ifdef IEEE80211_DEBUG
1588         /*
1589          * It's easier, but too expensive, to simulate different mesh
1590          * topologies by consulting the ACL policy very early, so do this
1591          * only under DEBUG.
1592          *
1593          * NB: this check is also done upon peering link initiation.
1594          */
1595         if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) {
1596                 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL,
1597                     wh, NULL, "%s", "disallowed by ACL");
1598                 vap->iv_stats.is_rx_acl++;
1599                 goto out;
1600         }
1601 #endif
1602         switch (type) {
1603         case IEEE80211_FC0_TYPE_DATA:
1604                 if (ni == vap->iv_bss)
1605                         goto out;
1606                 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) {
1607                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
1608                             ni->ni_macaddr, NULL,
1609                             "peer link not yet established (%d)",
1610                             ni->ni_mlstate);
1611                         vap->iv_stats.is_mesh_nolink++;
1612                         goto out;
1613                 }
1614                 if (dir != IEEE80211_FC1_DIR_FROMDS &&
1615                     dir != IEEE80211_FC1_DIR_DSTODS) {
1616                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1617                             wh, "data", "incorrect dir 0x%x", dir);
1618                         vap->iv_stats.is_rx_wrongdir++;
1619                         goto err;
1620                 }
1621
1622                 /* All Mesh data frames are QoS subtype */
1623                 if (!HAS_SEQ(type)) {
1624                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1625                             wh, "data", "incorrect subtype 0x%x", subtype);
1626                         vap->iv_stats.is_rx_badsubtype++;
1627                         goto err;
1628                 }
1629
1630                 /*
1631                  * Next up, any fragmentation.
1632                  * XXX: we defrag before we even try to forward,
1633                  * Mesh Control field is not present in sub-sequent
1634                  * fragmented frames. This is in contrast to Draft 4.0.
1635                  */
1636                 hdrspace = ieee80211_hdrspace(ic, wh);
1637                 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1638                         m = ieee80211_defrag(ni, m, hdrspace);
1639                         if (m == NULL) {
1640                                 /* Fragment dropped or frame not complete yet */
1641                                 goto out;
1642                         }
1643                 }
1644                 wh = mtod(m, struct ieee80211_frame *); /* NB: after defrag */
1645
1646                 /*
1647                  * Now we have a complete Mesh Data frame.
1648                  */
1649
1650                 /*
1651                  * Only fromDStoDS data frames use 4 address qos frames
1652                  * as specified in amendment. Otherwise addr4 is located
1653                  * in the Mesh Control field and a 3 address qos frame
1654                  * is used.
1655                  */
1656                 *(uint16_t *)qos = *(uint16_t *)ieee80211_getqos(wh);
1657
1658                 /*
1659                  * NB: The mesh STA sets the Mesh Control Present
1660                  * subfield to 1 in the Mesh Data frame containing
1661                  * an unfragmented MSDU, an A-MSDU, or the first
1662                  * fragment of an MSDU.
1663                  * After defrag it should always be present.
1664                  */
1665                 if (!(qos[1] & IEEE80211_QOS_MC)) {
1666                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
1667                             ni->ni_macaddr, NULL,
1668                             "%s", "Mesh control field not present");
1669                         vap->iv_stats.is_rx_elem_missing++; /* XXX: kinda */
1670                         goto err;
1671                 }
1672
1673                 /* pull up enough to get to the mesh control */
1674                 if (m->m_len < hdrspace + sizeof(struct ieee80211_meshcntl) &&
1675                     (m = m_pullup(m, hdrspace +
1676                         sizeof(struct ieee80211_meshcntl))) == NULL) {
1677                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1678                             ni->ni_macaddr, NULL,
1679                             "data too short: expecting %u", hdrspace);
1680                         vap->iv_stats.is_rx_tooshort++;
1681                         goto out;               /* XXX */
1682                 }
1683                 /*
1684                  * Now calculate the full extent of the headers. Note
1685                  * mesh_decap will pull up anything we didn't get
1686                  * above when it strips the 802.11 headers.
1687                  */
1688                 mc = (const struct ieee80211_meshcntl *)
1689                     (mtod(m, const uint8_t *) + hdrspace);
1690                 ae = mc->mc_flags & IEEE80211_MESH_AE_MASK;
1691                 meshdrlen = sizeof(struct ieee80211_meshcntl) +
1692                     ae * IEEE80211_ADDR_LEN;
1693                 hdrspace += meshdrlen;
1694
1695                 /* pull complete hdrspace = ieee80211_hdrspace + meshcontrol */
1696                 if ((meshdrlen > sizeof(struct ieee80211_meshcntl)) &&
1697                     (m->m_len < hdrspace) &&
1698                     ((m = m_pullup(m, hdrspace)) == NULL)) {
1699                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1700                             ni->ni_macaddr, NULL,
1701                             "data too short: expecting %u", hdrspace);
1702                         vap->iv_stats.is_rx_tooshort++;
1703                         goto out;               /* XXX */
1704                 }
1705                 /* XXX: are we sure there is no reallocating after m_pullup? */
1706
1707                 seq = le32dec(mc->mc_seq);
1708                 if (IEEE80211_IS_MULTICAST(wh->i_addr1))
1709                         addr = wh->i_addr3;
1710                 else if (ae == IEEE80211_MESH_AE_01)
1711                         addr = MC01(mc)->mc_addr4;
1712                 else
1713                         addr = ((struct ieee80211_qosframe_addr4 *)wh)->i_addr4;
1714                 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, addr)) {
1715                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
1716                             addr, "data", "%s", "not to me");
1717                         vap->iv_stats.is_rx_wrongbss++; /* XXX kinda */
1718                         goto out;
1719                 }
1720                 if (mesh_checkpseq(vap, addr, seq) != 0) {
1721                         vap->iv_stats.is_rx_dup++;
1722                         goto out;
1723                 }
1724
1725                 /* This code "routes" the frame to the right control path */
1726                 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1727                         if (IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr3))
1728                                 error =
1729                                     mesh_recv_indiv_data_to_me(vap, m, wh, mc);
1730                         else if (IEEE80211_IS_MULTICAST(wh->i_addr3))
1731                                 error = mesh_recv_group_data(vap, m, wh, mc);
1732                         else
1733                                 error = mesh_recv_indiv_data_to_fwrd(vap, m,
1734                                     wh, mc);
1735                 } else
1736                         error = mesh_recv_group_data(vap, m, wh, mc);
1737                 if (error < 0)
1738                         goto err;
1739                 else if (error > 0)
1740                         goto out;
1741
1742                 if (ieee80211_radiotap_active_vap(vap))
1743                         ieee80211_radiotap_rx(vap, m);
1744                 need_tap = 0;
1745
1746                 /*
1747                  * Finally, strip the 802.11 header.
1748                  */
1749                 m = mesh_decap(vap, m, hdrspace, meshdrlen);
1750                 if (m == NULL) {
1751                         /* XXX mask bit to check for both */
1752                         /* don't count Null data frames as errors */
1753                         if (subtype == IEEE80211_FC0_SUBTYPE_NODATA ||
1754                             subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL)
1755                                 goto out;
1756                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
1757                             ni->ni_macaddr, "data", "%s", "decap error");
1758                         vap->iv_stats.is_rx_decap++;
1759                         IEEE80211_NODE_STAT(ni, rx_decap);
1760                         goto err;
1761                 }
1762                 if (qos[0] & IEEE80211_QOS_AMSDU) {
1763                         m = ieee80211_decap_amsdu(ni, m);
1764                         if (m == NULL)
1765                                 return IEEE80211_FC0_TYPE_DATA;
1766                 }
1767                 ieee80211_deliver_data(vap, ni, m);
1768                 return type;
1769         case IEEE80211_FC0_TYPE_MGT:
1770                 vap->iv_stats.is_rx_mgmt++;
1771                 IEEE80211_NODE_STAT(ni, rx_mgmt);
1772                 if (dir != IEEE80211_FC1_DIR_NODS) {
1773                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1774                             wh, "mgt", "incorrect dir 0x%x", dir);
1775                         vap->iv_stats.is_rx_wrongdir++;
1776                         goto err;
1777                 }
1778                 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) {
1779                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1780                             ni->ni_macaddr, "mgt", "too short: len %u",
1781                             m->m_pkthdr.len);
1782                         vap->iv_stats.is_rx_tooshort++;
1783                         goto out;
1784                 }
1785 #ifdef IEEE80211_DEBUG
1786                 if ((ieee80211_msg_debug(vap) &&
1787                     (vap->iv_ic->ic_flags & IEEE80211_F_SCAN)) ||
1788                     ieee80211_msg_dumppkts(vap)) {
1789                         if_printf(ifp, "received %s from %s rssi %d\n",
1790                             ieee80211_mgt_subtype_name(subtype),
1791                             ether_sprintf(wh->i_addr2), rssi);
1792                 }
1793 #endif
1794                 if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) {
1795                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1796                             wh, NULL, "%s", "WEP set but not permitted");
1797                         vap->iv_stats.is_rx_mgtdiscard++; /* XXX */
1798                         goto out;
1799                 }
1800                 vap->iv_recv_mgmt(ni, m, subtype, rxs, rssi, nf);
1801                 goto out;
1802         case IEEE80211_FC0_TYPE_CTL:
1803                 vap->iv_stats.is_rx_ctl++;
1804                 IEEE80211_NODE_STAT(ni, rx_ctrl);
1805                 goto out;
1806         default:
1807                 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1808                     wh, "bad", "frame type 0x%x", type);
1809                 /* should not come here */
1810                 break;
1811         }
1812 err:
1813         if_inc_counter(ifp, IFCOUNTER_IERRORS, 1);
1814 out:
1815         if (m != NULL) {
1816                 if (need_tap && ieee80211_radiotap_active_vap(vap))
1817                         ieee80211_radiotap_rx(vap, m);
1818                 m_freem(m);
1819         }
1820         return type;
1821 #undef  HAS_SEQ
1822 #undef  MC01
1823 }
1824
1825 static void
1826 mesh_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, int subtype,
1827     const struct ieee80211_rx_stats *rxs, int rssi, int nf)
1828 {
1829         struct ieee80211vap *vap = ni->ni_vap;
1830         struct ieee80211_mesh_state *ms = vap->iv_mesh;
1831         struct ieee80211com *ic = ni->ni_ic;
1832         struct ieee80211_channel *rxchan = ic->ic_curchan;
1833         struct ieee80211_frame *wh;
1834         struct ieee80211_mesh_route *rt;
1835         uint8_t *frm, *efrm;
1836
1837         wh = mtod(m0, struct ieee80211_frame *);
1838         frm = (uint8_t *)&wh[1];
1839         efrm = mtod(m0, uint8_t *) + m0->m_len;
1840         switch (subtype) {
1841         case IEEE80211_FC0_SUBTYPE_PROBE_RESP:
1842         case IEEE80211_FC0_SUBTYPE_BEACON:
1843         {
1844                 struct ieee80211_scanparams scan;
1845                 struct ieee80211_channel *c;
1846                 /*
1847                  * We process beacon/probe response
1848                  * frames to discover neighbors.
1849                  */
1850                 if (rxs != NULL) {
1851                         c = ieee80211_lookup_channel_rxstatus(vap, rxs);
1852                         if (c != NULL)
1853                                 rxchan = c;
1854                 }
1855                 if (ieee80211_parse_beacon(ni, m0, rxchan, &scan) != 0)
1856                         return;
1857                 /*
1858                  * Count frame now that we know it's to be processed.
1859                  */
1860                 if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) {
1861                         vap->iv_stats.is_rx_beacon++;   /* XXX remove */
1862                         IEEE80211_NODE_STAT(ni, rx_beacons);
1863                 } else
1864                         IEEE80211_NODE_STAT(ni, rx_proberesp);
1865                 /*
1866                  * If scanning, just pass information to the scan module.
1867                  */
1868                 if (ic->ic_flags & IEEE80211_F_SCAN) {
1869                         if (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN) {
1870                                 /*
1871                                  * Actively scanning a channel marked passive;
1872                                  * send a probe request now that we know there
1873                                  * is 802.11 traffic present.
1874                                  *
1875                                  * XXX check if the beacon we recv'd gives
1876                                  * us what we need and suppress the probe req
1877                                  */
1878                                 ieee80211_probe_curchan(vap, 1);
1879                                 ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN;
1880                         }
1881                         ieee80211_add_scan(vap, rxchan, &scan, wh,
1882                             subtype, rssi, nf);
1883                         return;
1884                 }
1885
1886                 /* The rest of this code assumes we are running */
1887                 if (vap->iv_state != IEEE80211_S_RUN)
1888                         return;
1889                 /*
1890                  * Ignore non-mesh STAs.
1891                  */
1892                 if ((scan.capinfo &
1893                      (IEEE80211_CAPINFO_ESS|IEEE80211_CAPINFO_IBSS)) ||
1894                     scan.meshid == NULL || scan.meshconf == NULL) {
1895                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1896                             wh, "beacon", "%s", "not a mesh sta");
1897                         vap->iv_stats.is_mesh_wrongmesh++;
1898                         return;
1899                 }
1900                 /*
1901                  * Ignore STAs for other mesh networks.
1902                  */
1903                 if (memcmp(scan.meshid+2, ms->ms_id, ms->ms_idlen) != 0 ||
1904                     mesh_verify_meshconf(vap, scan.meshconf)) {
1905                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1906                             wh, "beacon", "%s", "not for our mesh");
1907                         vap->iv_stats.is_mesh_wrongmesh++;
1908                         return;
1909                 }
1910                 /*
1911                  * Peer only based on the current ACL policy.
1912                  */
1913                 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) {
1914                         IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL,
1915                             wh, NULL, "%s", "disallowed by ACL");
1916                         vap->iv_stats.is_rx_acl++;
1917                         return;
1918                 }
1919                 /*
1920                  * Do neighbor discovery.
1921                  */
1922                 if (!IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_macaddr)) {
1923                         /*
1924                          * Create a new entry in the neighbor table.
1925                          */
1926                         ni = ieee80211_add_neighbor(vap, wh, &scan);
1927                 }
1928                 /*
1929                  * Automatically peer with discovered nodes if possible.
1930                  */
1931                 if (ni != vap->iv_bss &&
1932                     (ms->ms_flags & IEEE80211_MESHFLAGS_AP)) {
1933                         switch (ni->ni_mlstate) {
1934                         case IEEE80211_NODE_MESH_IDLE:
1935                         {
1936                                 uint16_t args[1];
1937
1938                                 /* Wait for backoff callout to reset counter */
1939                                 if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding)
1940                                         return;
1941
1942                                 ni->ni_mlpid = mesh_generateid(vap);
1943                                 if (ni->ni_mlpid == 0)
1944                                         return;
1945                                 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENSNT);
1946                                 args[0] = ni->ni_mlpid;
1947                                 ieee80211_send_action(ni,
1948                                 IEEE80211_ACTION_CAT_SELF_PROT,
1949                                 IEEE80211_ACTION_MESHPEERING_OPEN, args);
1950                                 ni->ni_mlrcnt = 0;
1951                                 mesh_peer_timeout_setup(ni);
1952                                 break;
1953                         }
1954                         case IEEE80211_NODE_MESH_ESTABLISHED:
1955                         {
1956                                 /*
1957                                  * Valid beacon from a peer mesh STA
1958                                  * bump TA lifetime
1959                                  */
1960                                 rt = ieee80211_mesh_rt_find(vap, wh->i_addr2);
1961                                 if(rt != NULL) {
1962                                         ieee80211_mesh_rt_update(rt,
1963                                             ticks_to_msecs(
1964                                             ms->ms_ppath->mpp_inact));
1965                                 }
1966                                 break;
1967                         }
1968                         default:
1969                                 break; /* ignore */
1970                         }
1971                 }
1972                 break;
1973         }
1974         case IEEE80211_FC0_SUBTYPE_PROBE_REQ:
1975         {
1976                 uint8_t *ssid, *meshid, *rates, *xrates;
1977
1978                 if (vap->iv_state != IEEE80211_S_RUN) {
1979                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1980                             wh, NULL, "wrong state %s",
1981                             ieee80211_state_name[vap->iv_state]);
1982                         vap->iv_stats.is_rx_mgtdiscard++;
1983                         return;
1984                 }
1985                 if (IEEE80211_IS_MULTICAST(wh->i_addr2)) {
1986                         /* frame must be directed */
1987                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1988                             wh, NULL, "%s", "not unicast");
1989                         vap->iv_stats.is_rx_mgtdiscard++;       /* XXX stat */
1990                         return;
1991                 }
1992                 /*
1993                  * prreq frame format
1994                  *      [tlv] ssid
1995                  *      [tlv] supported rates
1996                  *      [tlv] extended supported rates
1997                  *      [tlv] mesh id
1998                  */
1999                 ssid = meshid = rates = xrates = NULL;
2000                 while (efrm - frm > 1) {
2001                         IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return);
2002                         switch (*frm) {
2003                         case IEEE80211_ELEMID_SSID:
2004                                 ssid = frm;
2005                                 break;
2006                         case IEEE80211_ELEMID_RATES:
2007                                 rates = frm;
2008                                 break;
2009                         case IEEE80211_ELEMID_XRATES:
2010                                 xrates = frm;
2011                                 break;
2012                         case IEEE80211_ELEMID_MESHID:
2013                                 meshid = frm;
2014                                 break;
2015                         }
2016                         frm += frm[1] + 2;
2017                 }
2018                 IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return);
2019                 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return);
2020                 if (xrates != NULL)
2021                         IEEE80211_VERIFY_ELEMENT(xrates,
2022                             IEEE80211_RATE_MAXSIZE - rates[1], return);
2023                 if (meshid != NULL) {
2024                         IEEE80211_VERIFY_ELEMENT(meshid,
2025                             IEEE80211_MESHID_LEN, return);
2026                         /* NB: meshid, not ssid */
2027                         IEEE80211_VERIFY_SSID(vap->iv_bss, meshid, return);
2028                 }
2029
2030                 /* XXX find a better class or define it's own */
2031                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_INPUT, wh->i_addr2,
2032                     "%s", "recv probe req");
2033                 /*
2034                  * Some legacy 11b clients cannot hack a complete
2035                  * probe response frame.  When the request includes
2036                  * only a bare-bones rate set, communicate this to
2037                  * the transmit side.
2038                  */
2039                 ieee80211_send_proberesp(vap, wh->i_addr2, 0);
2040                 break;
2041         }
2042
2043         case IEEE80211_FC0_SUBTYPE_ACTION:
2044         case IEEE80211_FC0_SUBTYPE_ACTION_NOACK:
2045                 if (ni == vap->iv_bss) {
2046                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2047                             wh, NULL, "%s", "unknown node");
2048                         vap->iv_stats.is_rx_mgtdiscard++;
2049                 } else if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) &&
2050                     !IEEE80211_IS_MULTICAST(wh->i_addr1)) {
2051                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2052                             wh, NULL, "%s", "not for us");
2053                         vap->iv_stats.is_rx_mgtdiscard++;
2054                 } else if (vap->iv_state != IEEE80211_S_RUN) {
2055                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2056                             wh, NULL, "wrong state %s",
2057                             ieee80211_state_name[vap->iv_state]);
2058                         vap->iv_stats.is_rx_mgtdiscard++;
2059                 } else {
2060                         if (ieee80211_parse_action(ni, m0) == 0)
2061                                 (void)ic->ic_recv_action(ni, wh, frm, efrm);
2062                 }
2063                 break;
2064
2065         case IEEE80211_FC0_SUBTYPE_ASSOC_REQ:
2066         case IEEE80211_FC0_SUBTYPE_ASSOC_RESP:
2067         case IEEE80211_FC0_SUBTYPE_REASSOC_REQ:
2068         case IEEE80211_FC0_SUBTYPE_REASSOC_RESP:
2069         case IEEE80211_FC0_SUBTYPE_TIMING_ADV:
2070         case IEEE80211_FC0_SUBTYPE_ATIM:
2071         case IEEE80211_FC0_SUBTYPE_DISASSOC:
2072         case IEEE80211_FC0_SUBTYPE_AUTH:
2073         case IEEE80211_FC0_SUBTYPE_DEAUTH:
2074                 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2075                     wh, NULL, "%s", "not handled");
2076                 vap->iv_stats.is_rx_mgtdiscard++;
2077                 break;
2078
2079         default:
2080                 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
2081                     wh, "mgt", "subtype 0x%x not handled", subtype);
2082                 vap->iv_stats.is_rx_badsubtype++;
2083                 break;
2084         }
2085 }
2086
2087 static void
2088 mesh_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype)
2089 {
2090
2091         switch (subtype) {
2092         case IEEE80211_FC0_SUBTYPE_BAR:
2093                 ieee80211_recv_bar(ni, m);
2094                 break;
2095         }
2096 }
2097
2098 /*
2099  * Parse meshpeering action ie's for MPM frames
2100  */
2101 static const struct ieee80211_meshpeer_ie *
2102 mesh_parse_meshpeering_action(struct ieee80211_node *ni,
2103         const struct ieee80211_frame *wh,       /* XXX for VERIFY_LENGTH */
2104         const uint8_t *frm, const uint8_t *efrm,
2105         struct ieee80211_meshpeer_ie *mp, uint8_t subtype)
2106 {
2107         struct ieee80211vap *vap = ni->ni_vap;
2108         const struct ieee80211_meshpeer_ie *mpie;
2109         uint16_t args[3];
2110         const uint8_t *meshid, *meshconf;
2111         uint8_t sendclose = 0; /* 1 = MPM frame rejected, close will be sent */
2112
2113         meshid = meshconf = NULL;
2114         while (efrm - frm > 1) {
2115                 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return NULL);
2116                 switch (*frm) {
2117                 case IEEE80211_ELEMID_MESHID:
2118                         meshid = frm;
2119                         break;
2120                 case IEEE80211_ELEMID_MESHCONF:
2121                         meshconf = frm;
2122                         break;
2123                 case IEEE80211_ELEMID_MESHPEER:
2124                         mpie = (const struct ieee80211_meshpeer_ie *) frm;
2125                         memset(mp, 0, sizeof(*mp));
2126                         mp->peer_len = mpie->peer_len;
2127                         mp->peer_proto = le16dec(&mpie->peer_proto);
2128                         mp->peer_llinkid = le16dec(&mpie->peer_llinkid);
2129                         switch (subtype) {
2130                         case IEEE80211_ACTION_MESHPEERING_CONFIRM:
2131                                 mp->peer_linkid =
2132                                     le16dec(&mpie->peer_linkid);
2133                                 break;
2134                         case IEEE80211_ACTION_MESHPEERING_CLOSE:
2135                                 /* NB: peer link ID is optional */
2136                                 if (mpie->peer_len ==
2137                                     (IEEE80211_MPM_BASE_SZ + 2)) {
2138                                         mp->peer_linkid = 0;
2139                                         mp->peer_rcode =
2140                                             le16dec(&mpie->peer_linkid);
2141                                 } else {
2142                                         mp->peer_linkid =
2143                                             le16dec(&mpie->peer_linkid);
2144                                         mp->peer_rcode =
2145                                             le16dec(&mpie->peer_rcode);
2146                                 }
2147                                 break;
2148                         }
2149                         break;
2150                 }
2151                 frm += frm[1] + 2;
2152         }
2153
2154         /*
2155          * Verify the contents of the frame.
2156          * If it fails validation, close the peer link.
2157          */
2158         if (mesh_verify_meshpeer(vap, subtype, (const uint8_t *)mp)) {
2159                 sendclose = 1;
2160                 IEEE80211_DISCARD(vap,
2161                     IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2162                     wh, NULL, "%s", "MPM validation failed");
2163         }
2164
2165         /* If meshid is not the same reject any frames type. */
2166         if (sendclose == 0 && mesh_verify_meshid(vap, meshid)) {
2167                 sendclose = 1;
2168                 IEEE80211_DISCARD(vap,
2169                     IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2170                     wh, NULL, "%s", "not for our mesh");
2171                 if (subtype == IEEE80211_ACTION_MESHPEERING_CLOSE) {
2172                         /*
2173                          * Standard not clear about this, if we dont ignore
2174                          * there will be an endless loop between nodes sending
2175                          * CLOSE frames between each other with wrong meshid.
2176                          * Discard and timers will bring FSM to IDLE state.
2177                          */
2178                         return NULL;
2179                 }
2180         }
2181
2182         /*
2183          * Close frames are accepted if meshid is the same.
2184          * Verify the other two types.
2185          */
2186         if (sendclose == 0 && subtype != IEEE80211_ACTION_MESHPEERING_CLOSE &&
2187             mesh_verify_meshconf(vap, meshconf)) {
2188                 sendclose = 1;
2189                 IEEE80211_DISCARD(vap,
2190                     IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2191                     wh, NULL, "%s", "configuration missmatch");
2192         }
2193
2194         if (sendclose) {
2195                 vap->iv_stats.is_rx_mgtdiscard++;
2196                 switch (ni->ni_mlstate) {
2197                 case IEEE80211_NODE_MESH_IDLE:
2198                 case IEEE80211_NODE_MESH_ESTABLISHED:
2199                 case IEEE80211_NODE_MESH_HOLDING:
2200                         /* ignore */
2201                         break;
2202                 case IEEE80211_NODE_MESH_OPENSNT:
2203                 case IEEE80211_NODE_MESH_OPENRCV:
2204                 case IEEE80211_NODE_MESH_CONFIRMRCV:
2205                         args[0] = ni->ni_mlpid;
2206                         args[1] = ni->ni_mllid;
2207                         /* Reason codes for rejection */
2208                         switch (subtype) {
2209                         case IEEE80211_ACTION_MESHPEERING_OPEN:
2210                                 args[2] = IEEE80211_REASON_MESH_CPVIOLATION;
2211                                 break;
2212                         case IEEE80211_ACTION_MESHPEERING_CONFIRM:
2213                                 args[2] = IEEE80211_REASON_MESH_INCONS_PARAMS;
2214                                 break;
2215                         }
2216                         ieee80211_send_action(ni,
2217                             IEEE80211_ACTION_CAT_SELF_PROT,
2218                             IEEE80211_ACTION_MESHPEERING_CLOSE,
2219                             args);
2220                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2221                         mesh_peer_timeout_setup(ni);
2222                         break;
2223                 }
2224                 return NULL;
2225         }
2226
2227         return (const struct ieee80211_meshpeer_ie *) mp;
2228 }
2229
2230 static int
2231 mesh_recv_action_meshpeering_open(struct ieee80211_node *ni,
2232         const struct ieee80211_frame *wh,
2233         const uint8_t *frm, const uint8_t *efrm)
2234 {
2235         struct ieee80211vap *vap = ni->ni_vap;
2236         struct ieee80211_mesh_state *ms = vap->iv_mesh;
2237         struct ieee80211_meshpeer_ie ie;
2238         const struct ieee80211_meshpeer_ie *meshpeer;
2239         uint16_t args[3];
2240
2241         /* +2+2 for action + code + capabilites */
2242         meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2, efrm, &ie,
2243             IEEE80211_ACTION_MESHPEERING_OPEN);
2244         if (meshpeer == NULL) {
2245                 return 0;
2246         }
2247
2248         /* XXX move up */
2249         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2250             "recv PEER OPEN, lid 0x%x", meshpeer->peer_llinkid);
2251
2252         switch (ni->ni_mlstate) {
2253         case IEEE80211_NODE_MESH_IDLE:
2254                 /* Reject open request if reached our maximum neighbor count */
2255                 if (ms->ms_neighbors >= IEEE80211_MESH_MAX_NEIGHBORS) {
2256                         args[0] = meshpeer->peer_llinkid;
2257                         args[1] = 0;
2258                         args[2] = IEEE80211_REASON_MESH_MAX_PEERS;
2259                         ieee80211_send_action(ni,
2260                             IEEE80211_ACTION_CAT_SELF_PROT,
2261                             IEEE80211_ACTION_MESHPEERING_CLOSE,
2262                             args);
2263                         /* stay in IDLE state */
2264                         return (0);
2265                 }
2266                 /* Open frame accepted */
2267                 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV);
2268                 ni->ni_mllid = meshpeer->peer_llinkid;
2269                 ni->ni_mlpid = mesh_generateid(vap);
2270                 if (ni->ni_mlpid == 0)
2271                         return 0;               /* XXX */
2272                 args[0] = ni->ni_mlpid;
2273                 /* Announce we're open too... */
2274                 ieee80211_send_action(ni,
2275                     IEEE80211_ACTION_CAT_SELF_PROT,
2276                     IEEE80211_ACTION_MESHPEERING_OPEN, args);
2277                 /* ...and confirm the link. */
2278                 args[0] = ni->ni_mlpid;
2279                 args[1] = ni->ni_mllid;
2280                 ieee80211_send_action(ni,
2281                     IEEE80211_ACTION_CAT_SELF_PROT,
2282                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
2283                     args);
2284                 mesh_peer_timeout_setup(ni);
2285                 break;
2286         case IEEE80211_NODE_MESH_OPENRCV:
2287                 /* Wrong Link ID */
2288                 if (ni->ni_mllid != meshpeer->peer_llinkid) {
2289                         args[0] = ni->ni_mllid;
2290                         args[1] = ni->ni_mlpid;
2291                         args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2292                         ieee80211_send_action(ni,
2293                             IEEE80211_ACTION_CAT_SELF_PROT,
2294                             IEEE80211_ACTION_MESHPEERING_CLOSE,
2295                             args);
2296                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2297                         mesh_peer_timeout_setup(ni);
2298                         break;
2299                 }
2300                 /* Duplicate open, confirm again. */
2301                 args[0] = ni->ni_mlpid;
2302                 args[1] = ni->ni_mllid;
2303                 ieee80211_send_action(ni,
2304                     IEEE80211_ACTION_CAT_SELF_PROT,
2305                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
2306                     args);
2307                 break;
2308         case IEEE80211_NODE_MESH_OPENSNT:
2309                 ni->ni_mllid = meshpeer->peer_llinkid;
2310                 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV);
2311                 args[0] = ni->ni_mlpid;
2312                 args[1] = ni->ni_mllid;
2313                 ieee80211_send_action(ni,
2314                     IEEE80211_ACTION_CAT_SELF_PROT,
2315                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
2316                     args);
2317                 /* NB: don't setup/clear any timeout */
2318                 break;
2319         case IEEE80211_NODE_MESH_CONFIRMRCV:
2320                 if (ni->ni_mlpid != meshpeer->peer_linkid ||
2321                     ni->ni_mllid != meshpeer->peer_llinkid) {
2322                         args[0] = ni->ni_mlpid;
2323                         args[1] = ni->ni_mllid;
2324                         args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2325                         ieee80211_send_action(ni,
2326                             IEEE80211_ACTION_CAT_SELF_PROT,
2327                             IEEE80211_ACTION_MESHPEERING_CLOSE,
2328                             args);
2329                         mesh_linkchange(ni,
2330                             IEEE80211_NODE_MESH_HOLDING);
2331                         mesh_peer_timeout_setup(ni);
2332                         break;
2333                 }
2334                 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED);
2335                 ni->ni_mllid = meshpeer->peer_llinkid;
2336                 args[0] = ni->ni_mlpid;
2337                 args[1] = ni->ni_mllid;
2338                 ieee80211_send_action(ni,
2339                     IEEE80211_ACTION_CAT_SELF_PROT,
2340                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
2341                     args);
2342                 mesh_peer_timeout_stop(ni);
2343                 break;
2344         case IEEE80211_NODE_MESH_ESTABLISHED:
2345                 if (ni->ni_mllid != meshpeer->peer_llinkid) {
2346                         args[0] = ni->ni_mllid;
2347                         args[1] = ni->ni_mlpid;
2348                         args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2349                         ieee80211_send_action(ni,
2350                             IEEE80211_ACTION_CAT_SELF_PROT,
2351                             IEEE80211_ACTION_MESHPEERING_CLOSE,
2352                             args);
2353                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2354                         mesh_peer_timeout_setup(ni);
2355                         break;
2356                 }
2357                 args[0] = ni->ni_mlpid;
2358                 args[1] = ni->ni_mllid;
2359                 ieee80211_send_action(ni,
2360                     IEEE80211_ACTION_CAT_SELF_PROT,
2361                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
2362                     args);
2363                 break;
2364         case IEEE80211_NODE_MESH_HOLDING:
2365                 args[0] = ni->ni_mlpid;
2366                 args[1] = meshpeer->peer_llinkid;
2367                 /* Standard not clear about what the reaason code should be */
2368                 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2369                 ieee80211_send_action(ni,
2370                     IEEE80211_ACTION_CAT_SELF_PROT,
2371                     IEEE80211_ACTION_MESHPEERING_CLOSE,
2372                     args);
2373                 break;
2374         }
2375         return 0;
2376 }
2377
2378 static int
2379 mesh_recv_action_meshpeering_confirm(struct ieee80211_node *ni,
2380         const struct ieee80211_frame *wh,
2381         const uint8_t *frm, const uint8_t *efrm)
2382 {
2383         struct ieee80211vap *vap = ni->ni_vap;
2384         struct ieee80211_meshpeer_ie ie;
2385         const struct ieee80211_meshpeer_ie *meshpeer;
2386         uint16_t args[3];
2387
2388         /* +2+2+2+2 for action + code + capabilites + status code + AID */
2389         meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2+2+2, efrm, &ie,
2390             IEEE80211_ACTION_MESHPEERING_CONFIRM);
2391         if (meshpeer == NULL) {
2392                 return 0;
2393         }
2394
2395         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2396             "recv PEER CONFIRM, local id 0x%x, peer id 0x%x",
2397             meshpeer->peer_llinkid, meshpeer->peer_linkid);
2398
2399         switch (ni->ni_mlstate) {
2400         case IEEE80211_NODE_MESH_OPENRCV:
2401                 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED);
2402                 mesh_peer_timeout_stop(ni);
2403                 break;
2404         case IEEE80211_NODE_MESH_OPENSNT:
2405                 mesh_linkchange(ni, IEEE80211_NODE_MESH_CONFIRMRCV);
2406                 mesh_peer_timeout_setup(ni);
2407                 break;
2408         case IEEE80211_NODE_MESH_HOLDING:
2409                 args[0] = ni->ni_mlpid;
2410                 args[1] = meshpeer->peer_llinkid;
2411                 /* Standard not clear about what the reaason code should be */
2412                 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2413                 ieee80211_send_action(ni,
2414                     IEEE80211_ACTION_CAT_SELF_PROT,
2415                     IEEE80211_ACTION_MESHPEERING_CLOSE,
2416                     args);
2417                 break;
2418         case IEEE80211_NODE_MESH_CONFIRMRCV:
2419                 if (ni->ni_mllid != meshpeer->peer_llinkid) {
2420                         args[0] = ni->ni_mlpid;
2421                         args[1] = ni->ni_mllid;
2422                         args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2423                         ieee80211_send_action(ni,
2424                             IEEE80211_ACTION_CAT_SELF_PROT,
2425                             IEEE80211_ACTION_MESHPEERING_CLOSE,
2426                             args);
2427                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2428                         mesh_peer_timeout_setup(ni);
2429                 }
2430                 break;
2431         default:
2432                 IEEE80211_DISCARD(vap,
2433                     IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2434                     wh, NULL, "received confirm in invalid state %d",
2435                     ni->ni_mlstate);
2436                 vap->iv_stats.is_rx_mgtdiscard++;
2437                 break;
2438         }
2439         return 0;
2440 }
2441
2442 static int
2443 mesh_recv_action_meshpeering_close(struct ieee80211_node *ni,
2444         const struct ieee80211_frame *wh,
2445         const uint8_t *frm, const uint8_t *efrm)
2446 {
2447         struct ieee80211_meshpeer_ie ie;
2448         const struct ieee80211_meshpeer_ie *meshpeer;
2449         uint16_t args[3];
2450
2451         /* +2 for action + code */
2452         meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2, efrm, &ie,
2453             IEEE80211_ACTION_MESHPEERING_CLOSE);
2454         if (meshpeer == NULL) {
2455                 return 0;
2456         }
2457
2458         /*
2459          * XXX: check reason code, for example we could receive
2460          * IEEE80211_REASON_MESH_MAX_PEERS then we should not attempt
2461          * to peer again.
2462          */
2463
2464         IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2465             ni, "%s", "recv PEER CLOSE");
2466
2467         switch (ni->ni_mlstate) {
2468         case IEEE80211_NODE_MESH_IDLE:
2469                 /* ignore */
2470                 break;
2471         case IEEE80211_NODE_MESH_OPENRCV:
2472         case IEEE80211_NODE_MESH_OPENSNT:
2473         case IEEE80211_NODE_MESH_CONFIRMRCV:
2474         case IEEE80211_NODE_MESH_ESTABLISHED:
2475                 args[0] = ni->ni_mlpid;
2476                 args[1] = ni->ni_mllid;
2477                 args[2] = IEEE80211_REASON_MESH_CLOSE_RCVD;
2478                 ieee80211_send_action(ni,
2479                     IEEE80211_ACTION_CAT_SELF_PROT,
2480                     IEEE80211_ACTION_MESHPEERING_CLOSE,
2481                     args);
2482                 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2483                 mesh_peer_timeout_setup(ni);
2484                 break;
2485         case IEEE80211_NODE_MESH_HOLDING:
2486                 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE);
2487                 mesh_peer_timeout_stop(ni);
2488                 break;
2489         }
2490         return 0;
2491 }
2492
2493 /*
2494  * Link Metric handling.
2495  */
2496 static int
2497 mesh_recv_action_meshlmetric(struct ieee80211_node *ni,
2498         const struct ieee80211_frame *wh,
2499         const uint8_t *frm, const uint8_t *efrm)
2500 {
2501         const struct ieee80211_meshlmetric_ie *ie =
2502             (const struct ieee80211_meshlmetric_ie *)
2503             (frm+2); /* action + code */
2504         struct ieee80211_meshlmetric_ie lm_rep;
2505
2506         if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) {
2507                 lm_rep.lm_flags = 0;
2508                 lm_rep.lm_metric = mesh_airtime_calc(ni);
2509                 ieee80211_send_action(ni,
2510                     IEEE80211_ACTION_CAT_MESH,
2511                     IEEE80211_ACTION_MESH_LMETRIC,
2512                     &lm_rep);
2513         }
2514         /* XXX: else do nothing for now */
2515         return 0;
2516 }
2517
2518 /*
2519  * Parse meshgate action ie's for GANN frames.
2520  * Returns -1 if parsing fails, otherwise 0.
2521  */
2522 static int
2523 mesh_parse_meshgate_action(struct ieee80211_node *ni,
2524     const struct ieee80211_frame *wh,   /* XXX for VERIFY_LENGTH */
2525     struct ieee80211_meshgann_ie *ie, const uint8_t *frm, const uint8_t *efrm)
2526 {
2527         struct ieee80211vap *vap = ni->ni_vap;
2528         const struct ieee80211_meshgann_ie *gannie;
2529
2530         while (efrm - frm > 1) {
2531                 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return -1);
2532                 switch (*frm) {
2533                 case IEEE80211_ELEMID_MESHGANN:
2534                         gannie = (const struct ieee80211_meshgann_ie *) frm;
2535                         memset(ie, 0, sizeof(*ie));
2536                         ie->gann_ie = gannie->gann_ie;
2537                         ie->gann_len = gannie->gann_len;
2538                         ie->gann_flags = gannie->gann_flags;
2539                         ie->gann_hopcount = gannie->gann_hopcount;
2540                         ie->gann_ttl = gannie->gann_ttl;
2541                         IEEE80211_ADDR_COPY(ie->gann_addr, gannie->gann_addr);
2542                         ie->gann_seq = le32dec(&gannie->gann_seq);
2543                         ie->gann_interval = le16dec(&gannie->gann_interval);
2544                         break;
2545                 }
2546                 frm += frm[1] + 2;
2547         }
2548
2549         return 0;
2550 }
2551
2552 /*
2553  * Mesh Gate Announcement handling.
2554  */
2555 static int
2556 mesh_recv_action_meshgate(struct ieee80211_node *ni,
2557         const struct ieee80211_frame *wh,
2558         const uint8_t *frm, const uint8_t *efrm)
2559 {
2560         struct ieee80211vap *vap = ni->ni_vap;
2561         struct ieee80211_mesh_state *ms = vap->iv_mesh;
2562         struct ieee80211_mesh_gate_route *gr, *next;
2563         struct ieee80211_mesh_route *rt_gate;
2564         struct ieee80211_meshgann_ie pgann;
2565         struct ieee80211_meshgann_ie ie;
2566         int found = 0;
2567
2568         /* +2 for action + code */
2569         if (mesh_parse_meshgate_action(ni, wh, &ie, frm+2, efrm) != 0) {
2570                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
2571                     ni->ni_macaddr, NULL, "%s",
2572                     "GANN parsing failed");
2573                 vap->iv_stats.is_rx_mgtdiscard++;
2574                 return (0);
2575         }
2576
2577         if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ie.gann_addr))
2578                 return 0;
2579
2580         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ni->ni_macaddr,
2581             "received GANN, meshgate: %6D (seq %u)", ie.gann_addr, ":",
2582             ie.gann_seq);
2583
2584         if (ms == NULL)
2585                 return (0);
2586         MESH_RT_LOCK(ms);
2587         TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) {
2588                 if (!IEEE80211_ADDR_EQ(gr->gr_addr, ie.gann_addr))
2589                         continue;
2590                 if (ie.gann_seq <= gr->gr_lastseq) {
2591                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
2592                             ni->ni_macaddr, NULL,
2593                             "GANN old seqno %u <= %u",
2594                             ie.gann_seq, gr->gr_lastseq);
2595                         MESH_RT_UNLOCK(ms);
2596                         return (0);
2597                 }
2598                 /* corresponding mesh gate found & GANN accepted */
2599                 found = 1;
2600                 break;
2601
2602         }
2603         if (found == 0) {
2604                 /* this GANN is from a new mesh Gate add it to known table. */
2605                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie.gann_addr,
2606                     "stored new GANN information, seq %u.", ie.gann_seq);
2607                 gr = IEEE80211_MALLOC(ALIGN(sizeof(struct ieee80211_mesh_gate_route)),
2608                     M_80211_MESH_GT_RT,
2609                     IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
2610                 IEEE80211_ADDR_COPY(gr->gr_addr, ie.gann_addr);
2611                 TAILQ_INSERT_TAIL(&ms->ms_known_gates, gr, gr_next);
2612         }
2613         gr->gr_lastseq = ie.gann_seq;
2614
2615         /* check if we have a path to this gate */
2616         rt_gate = mesh_rt_find_locked(ms, gr->gr_addr);
2617         if (rt_gate != NULL &&
2618             rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) {
2619                 gr->gr_route = rt_gate;
2620                 rt_gate->rt_flags |= IEEE80211_MESHRT_FLAGS_GATE;
2621         }
2622
2623         MESH_RT_UNLOCK(ms);
2624
2625         /* popagate only if decremented ttl >= 1 && forwarding is enabled */
2626         if ((ie.gann_ttl - 1) < 1 && !(ms->ms_flags & IEEE80211_MESHFLAGS_FWD))
2627                 return 0;
2628         pgann.gann_flags = ie.gann_flags; /* Reserved */
2629         pgann.gann_hopcount = ie.gann_hopcount + 1;
2630         pgann.gann_ttl = ie.gann_ttl - 1;
2631         IEEE80211_ADDR_COPY(pgann.gann_addr, ie.gann_addr);
2632         pgann.gann_seq = ie.gann_seq;
2633         pgann.gann_interval = ie.gann_interval;
2634
2635         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie.gann_addr,
2636             "%s", "propagate GANN");
2637
2638         ieee80211_send_action(vap->iv_bss, IEEE80211_ACTION_CAT_MESH,
2639             IEEE80211_ACTION_MESH_GANN, &pgann);
2640
2641         return 0;
2642 }
2643
2644 static int
2645 mesh_send_action(struct ieee80211_node *ni,
2646     const uint8_t sa[IEEE80211_ADDR_LEN],
2647     const uint8_t da[IEEE80211_ADDR_LEN],
2648     struct mbuf *m)
2649 {
2650         struct ieee80211vap *vap = ni->ni_vap;
2651         struct ieee80211com *ic = ni->ni_ic;
2652         struct ieee80211_bpf_params params;
2653         int ret;
2654
2655         KASSERT(ni != NULL, ("null node"));
2656
2657         if (vap->iv_state == IEEE80211_S_CAC) {
2658                 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT, ni,
2659                     "block %s frame in CAC state", "Mesh action");
2660                 vap->iv_stats.is_tx_badstate++;
2661                 ieee80211_free_node(ni);
2662                 m_freem(m);
2663                 return EIO;             /* XXX */
2664         }
2665
2666         M_PREPEND(m, sizeof(struct ieee80211_frame), M_NOWAIT);
2667         if (m == NULL) {
2668                 ieee80211_free_node(ni);
2669                 return ENOMEM;
2670         }
2671
2672         IEEE80211_TX_LOCK(ic);
2673         ieee80211_send_setup(ni, m,
2674              IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_ACTION,
2675              IEEE80211_NONQOS_TID, sa, da, sa);
2676         m->m_flags |= M_ENCAP;          /* mark encapsulated */
2677
2678         memset(&params, 0, sizeof(params));
2679         params.ibp_pri = WME_AC_VO;
2680         params.ibp_rate0 = ni->ni_txparms->mgmtrate;
2681         if (IEEE80211_IS_MULTICAST(da))
2682                 params.ibp_try0 = 1;
2683         else
2684                 params.ibp_try0 = ni->ni_txparms->maxretry;
2685         params.ibp_power = ni->ni_txpower;
2686
2687         IEEE80211_NODE_STAT(ni, tx_mgmt);
2688
2689         ret = ieee80211_raw_output(vap, ni, m, &params);
2690         IEEE80211_TX_UNLOCK(ic);
2691         return (ret);
2692 }
2693
2694 #define ADDSHORT(frm, v) do {                   \
2695         frm[0] = (v) & 0xff;                    \
2696         frm[1] = (v) >> 8;                      \
2697         frm += 2;                               \
2698 } while (0)
2699 #define ADDWORD(frm, v) do {                    \
2700         frm[0] = (v) & 0xff;                    \
2701         frm[1] = ((v) >> 8) & 0xff;             \
2702         frm[2] = ((v) >> 16) & 0xff;            \
2703         frm[3] = ((v) >> 24) & 0xff;            \
2704         frm += 4;                               \
2705 } while (0)
2706
2707 static int
2708 mesh_send_action_meshpeering_open(struct ieee80211_node *ni,
2709         int category, int action, void *args0)
2710 {
2711         struct ieee80211vap *vap = ni->ni_vap;
2712         struct ieee80211com *ic = ni->ni_ic;
2713         uint16_t *args = args0;
2714         const struct ieee80211_rateset *rs;
2715         struct mbuf *m;
2716         uint8_t *frm;
2717
2718         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2719             "send PEER OPEN action: localid 0x%x", args[0]);
2720
2721         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2722             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2723             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2724         ieee80211_ref_node(ni);
2725
2726         m = ieee80211_getmgtframe(&frm,
2727             ic->ic_headroom + sizeof(struct ieee80211_frame),
2728             sizeof(uint16_t)    /* action+category */
2729             + sizeof(uint16_t)  /* capabilites */
2730             + 2 + IEEE80211_RATE_SIZE
2731             + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
2732             + 2 + IEEE80211_MESHID_LEN
2733             + sizeof(struct ieee80211_meshconf_ie)
2734             + sizeof(struct ieee80211_meshpeer_ie)
2735         );
2736         if (m != NULL) {
2737                 /*
2738                  * mesh peer open action frame format:
2739                  *   [1] category
2740                  *   [1] action
2741                  *   [2] capabilities
2742                  *   [tlv] rates
2743                  *   [tlv] xrates
2744                  *   [tlv] mesh id
2745                  *   [tlv] mesh conf
2746                  *   [tlv] mesh peer link mgmt
2747                  */
2748                 *frm++ = category;
2749                 *frm++ = action;
2750                 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan));
2751                 rs = ieee80211_get_suprates(ic, ic->ic_curchan);
2752                 frm = ieee80211_add_rates(frm, rs);
2753                 frm = ieee80211_add_xrates(frm, rs);
2754                 frm = ieee80211_add_meshid(frm, vap);
2755                 frm = ieee80211_add_meshconf(frm, vap);
2756                 frm = ieee80211_add_meshpeer(frm, IEEE80211_ACTION_MESHPEERING_OPEN,
2757                     args[0], 0, 0);
2758                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2759                 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m);
2760         } else {
2761                 vap->iv_stats.is_tx_nobuf++;
2762                 ieee80211_free_node(ni);
2763                 return ENOMEM;
2764         }
2765 }
2766
2767 static int
2768 mesh_send_action_meshpeering_confirm(struct ieee80211_node *ni,
2769         int category, int action, void *args0)
2770 {
2771         struct ieee80211vap *vap = ni->ni_vap;
2772         struct ieee80211com *ic = ni->ni_ic;
2773         uint16_t *args = args0;
2774         const struct ieee80211_rateset *rs;
2775         struct mbuf *m;
2776         uint8_t *frm;
2777
2778         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2779             "send PEER CONFIRM action: localid 0x%x, peerid 0x%x",
2780             args[0], args[1]);
2781
2782         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2783             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2784             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2785         ieee80211_ref_node(ni);
2786
2787         m = ieee80211_getmgtframe(&frm,
2788             ic->ic_headroom + sizeof(struct ieee80211_frame),
2789             sizeof(uint16_t)    /* action+category */
2790             + sizeof(uint16_t)  /* capabilites */
2791             + sizeof(uint16_t)  /* status code */
2792             + sizeof(uint16_t)  /* AID */
2793             + 2 + IEEE80211_RATE_SIZE
2794             + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
2795             + 2 + IEEE80211_MESHID_LEN
2796             + sizeof(struct ieee80211_meshconf_ie)
2797             + sizeof(struct ieee80211_meshpeer_ie)
2798         );
2799         if (m != NULL) {
2800                 /*
2801                  * mesh peer confirm action frame format:
2802                  *   [1] category
2803                  *   [1] action
2804                  *   [2] capabilities
2805                  *   [2] status code
2806                  *   [2] association id (peer ID)
2807                  *   [tlv] rates
2808                  *   [tlv] xrates
2809                  *   [tlv] mesh id
2810                  *   [tlv] mesh conf
2811                  *   [tlv] mesh peer link mgmt
2812                  */
2813                 *frm++ = category;
2814                 *frm++ = action;
2815                 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan));
2816                 ADDSHORT(frm, 0);               /* status code */
2817                 ADDSHORT(frm, args[1]);         /* AID */
2818                 rs = ieee80211_get_suprates(ic, ic->ic_curchan);
2819                 frm = ieee80211_add_rates(frm, rs);
2820                 frm = ieee80211_add_xrates(frm, rs);
2821                 frm = ieee80211_add_meshid(frm, vap);
2822                 frm = ieee80211_add_meshconf(frm, vap);
2823                 frm = ieee80211_add_meshpeer(frm,
2824                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
2825                     args[0], args[1], 0);
2826                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2827                 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m);
2828         } else {
2829                 vap->iv_stats.is_tx_nobuf++;
2830                 ieee80211_free_node(ni);
2831                 return ENOMEM;
2832         }
2833 }
2834
2835 static int
2836 mesh_send_action_meshpeering_close(struct ieee80211_node *ni,
2837         int category, int action, void *args0)
2838 {
2839         struct ieee80211vap *vap = ni->ni_vap;
2840         struct ieee80211com *ic = ni->ni_ic;
2841         uint16_t *args = args0;
2842         struct mbuf *m;
2843         uint8_t *frm;
2844
2845         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2846             "send PEER CLOSE action: localid 0x%x, peerid 0x%x reason %d (%s)",
2847             args[0], args[1], args[2], ieee80211_reason_to_string(args[2]));
2848
2849         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2850             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2851             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2852         ieee80211_ref_node(ni);
2853
2854         m = ieee80211_getmgtframe(&frm,
2855             ic->ic_headroom + sizeof(struct ieee80211_frame),
2856             sizeof(uint16_t)    /* action+category */
2857             + sizeof(uint16_t)  /* reason code */
2858             + 2 + IEEE80211_MESHID_LEN
2859             + sizeof(struct ieee80211_meshpeer_ie)
2860         );
2861         if (m != NULL) {
2862                 /*
2863                  * mesh peer close action frame format:
2864                  *   [1] category
2865                  *   [1] action
2866                  *   [tlv] mesh id
2867                  *   [tlv] mesh peer link mgmt
2868                  */
2869                 *frm++ = category;
2870                 *frm++ = action;
2871                 frm = ieee80211_add_meshid(frm, vap);
2872                 frm = ieee80211_add_meshpeer(frm,
2873                     IEEE80211_ACTION_MESHPEERING_CLOSE,
2874                     args[0], args[1], args[2]);
2875                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2876                 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m);
2877         } else {
2878                 vap->iv_stats.is_tx_nobuf++;
2879                 ieee80211_free_node(ni);
2880                 return ENOMEM;
2881         }
2882 }
2883
2884 static int
2885 mesh_send_action_meshlmetric(struct ieee80211_node *ni,
2886         int category, int action, void *arg0)
2887 {
2888         struct ieee80211vap *vap = ni->ni_vap;
2889         struct ieee80211com *ic = ni->ni_ic;
2890         struct ieee80211_meshlmetric_ie *ie = arg0;
2891         struct mbuf *m;
2892         uint8_t *frm;
2893
2894         if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) {
2895                 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2896                     ni, "%s", "send LINK METRIC REQUEST action");
2897         } else {
2898                 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2899                     ni, "send LINK METRIC REPLY action: metric 0x%x",
2900                     ie->lm_metric);
2901         }
2902         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2903             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2904             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2905         ieee80211_ref_node(ni);
2906
2907         m = ieee80211_getmgtframe(&frm,
2908             ic->ic_headroom + sizeof(struct ieee80211_frame),
2909             sizeof(uint16_t) +  /* action+category */
2910             sizeof(struct ieee80211_meshlmetric_ie)
2911         );
2912         if (m != NULL) {
2913                 /*
2914                  * mesh link metric
2915                  *   [1] category
2916                  *   [1] action
2917                  *   [tlv] mesh link metric
2918                  */
2919                 *frm++ = category;
2920                 *frm++ = action;
2921                 frm = ieee80211_add_meshlmetric(frm,
2922                     ie->lm_flags, ie->lm_metric);
2923                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2924                 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m);
2925         } else {
2926                 vap->iv_stats.is_tx_nobuf++;
2927                 ieee80211_free_node(ni);
2928                 return ENOMEM;
2929         }
2930 }
2931
2932 static int
2933 mesh_send_action_meshgate(struct ieee80211_node *ni,
2934         int category, int action, void *arg0)
2935 {
2936         struct ieee80211vap *vap = ni->ni_vap;
2937         struct ieee80211com *ic = ni->ni_ic;
2938         struct ieee80211_meshgann_ie *ie = arg0;
2939         struct mbuf *m;
2940         uint8_t *frm;
2941
2942         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2943             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2944             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2945         ieee80211_ref_node(ni);
2946
2947         m = ieee80211_getmgtframe(&frm,
2948             ic->ic_headroom + sizeof(struct ieee80211_frame),
2949             sizeof(uint16_t) +  /* action+category */
2950             IEEE80211_MESHGANN_BASE_SZ
2951         );
2952         if (m != NULL) {
2953                 /*
2954                  * mesh link metric
2955                  *   [1] category
2956                  *   [1] action
2957                  *   [tlv] mesh gate annoucement
2958                  */
2959                 *frm++ = category;
2960                 *frm++ = action;
2961                 frm = ieee80211_add_meshgate(frm, ie);
2962                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2963                 return mesh_send_action(ni, vap->iv_myaddr, broadcastaddr, m);
2964         } else {
2965                 vap->iv_stats.is_tx_nobuf++;
2966                 ieee80211_free_node(ni);
2967                 return ENOMEM;
2968         }
2969 }
2970
2971 static void
2972 mesh_peer_timeout_setup(struct ieee80211_node *ni)
2973 {
2974         switch (ni->ni_mlstate) {
2975         case IEEE80211_NODE_MESH_HOLDING:
2976                 ni->ni_mltval = ieee80211_mesh_holdingtimeout;
2977                 break;
2978         case IEEE80211_NODE_MESH_CONFIRMRCV:
2979                 ni->ni_mltval = ieee80211_mesh_confirmtimeout;
2980                 break;
2981         case IEEE80211_NODE_MESH_IDLE:
2982                 ni->ni_mltval = 0;
2983                 break;
2984         default:
2985                 ni->ni_mltval = ieee80211_mesh_retrytimeout;
2986                 break;
2987         }
2988         if (ni->ni_mltval)
2989                 callout_reset(&ni->ni_mltimer, ni->ni_mltval,
2990                     mesh_peer_timeout_cb, ni);
2991 }
2992
2993 /*
2994  * Same as above but backoffs timer statisically 50%.
2995  */
2996 static void
2997 mesh_peer_timeout_backoff(struct ieee80211_node *ni)
2998 {
2999         uint32_t r;
3000
3001         r = arc4random();
3002         ni->ni_mltval += r % ni->ni_mltval;
3003         callout_reset(&ni->ni_mltimer, ni->ni_mltval, mesh_peer_timeout_cb,
3004             ni);
3005 }
3006
3007 static __inline void
3008 mesh_peer_timeout_stop(struct ieee80211_node *ni)
3009 {
3010         callout_drain(&ni->ni_mltimer);
3011 }
3012
3013 static void
3014 mesh_peer_backoff_cb(void *arg)
3015 {
3016         struct ieee80211_node *ni = (struct ieee80211_node *)arg;
3017
3018         /* After backoff timeout, try to peer automatically again. */
3019         ni->ni_mlhcnt = 0;
3020 }
3021
3022 /*
3023  * Mesh Peer Link Management FSM timeout handling.
3024  */
3025 static void
3026 mesh_peer_timeout_cb(void *arg)
3027 {
3028         struct ieee80211_node *ni = (struct ieee80211_node *)arg;
3029         uint16_t args[3];
3030
3031         IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_MESH,
3032             ni, "mesh link timeout, state %d, retry counter %d",
3033             ni->ni_mlstate, ni->ni_mlrcnt);
3034
3035         switch (ni->ni_mlstate) {
3036         case IEEE80211_NODE_MESH_IDLE:
3037         case IEEE80211_NODE_MESH_ESTABLISHED:
3038                 break;
3039         case IEEE80211_NODE_MESH_OPENSNT:
3040         case IEEE80211_NODE_MESH_OPENRCV:
3041                 if (ni->ni_mlrcnt == ieee80211_mesh_maxretries) {
3042                         args[0] = ni->ni_mlpid;
3043                         args[2] = IEEE80211_REASON_MESH_MAX_RETRIES;
3044                         ieee80211_send_action(ni,
3045                             IEEE80211_ACTION_CAT_SELF_PROT,
3046                             IEEE80211_ACTION_MESHPEERING_CLOSE, args);
3047                         ni->ni_mlrcnt = 0;
3048                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
3049                         mesh_peer_timeout_setup(ni);
3050                 } else {
3051                         args[0] = ni->ni_mlpid;
3052                         ieee80211_send_action(ni,
3053                             IEEE80211_ACTION_CAT_SELF_PROT,
3054                             IEEE80211_ACTION_MESHPEERING_OPEN, args);
3055                         ni->ni_mlrcnt++;
3056                         mesh_peer_timeout_backoff(ni);
3057                 }
3058                 break;
3059         case IEEE80211_NODE_MESH_CONFIRMRCV:
3060                 args[0] = ni->ni_mlpid;
3061                 args[2] = IEEE80211_REASON_MESH_CONFIRM_TIMEOUT;
3062                 ieee80211_send_action(ni,
3063                     IEEE80211_ACTION_CAT_SELF_PROT,
3064                     IEEE80211_ACTION_MESHPEERING_CLOSE, args);
3065                 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
3066                 mesh_peer_timeout_setup(ni);
3067                 break;
3068         case IEEE80211_NODE_MESH_HOLDING:
3069                 ni->ni_mlhcnt++;
3070                 if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding)
3071                         callout_reset(&ni->ni_mlhtimer,
3072                             ieee80211_mesh_backofftimeout,
3073                             mesh_peer_backoff_cb, ni);
3074                 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE);
3075                 break;
3076         }
3077 }
3078
3079 static int
3080 mesh_verify_meshid(struct ieee80211vap *vap, const uint8_t *ie)
3081 {
3082         struct ieee80211_mesh_state *ms = vap->iv_mesh;
3083
3084         if (ie == NULL || ie[1] != ms->ms_idlen)
3085                 return 1;
3086         return memcmp(ms->ms_id, ie + 2, ms->ms_idlen);
3087 }
3088
3089 /*
3090  * Check if we are using the same algorithms for this mesh.
3091  */
3092 static int
3093 mesh_verify_meshconf(struct ieee80211vap *vap, const uint8_t *ie)
3094 {
3095         const struct ieee80211_meshconf_ie *meshconf =
3096             (const struct ieee80211_meshconf_ie *) ie;
3097         const struct ieee80211_mesh_state *ms = vap->iv_mesh;
3098
3099         if (meshconf == NULL)
3100                 return 1;
3101         if (meshconf->conf_pselid != ms->ms_ppath->mpp_ie) {
3102                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3103                     "unknown path selection algorithm: 0x%x\n",
3104                     meshconf->conf_pselid);
3105                 return 1;
3106         }
3107         if (meshconf->conf_pmetid != ms->ms_pmetric->mpm_ie) {
3108                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3109                     "unknown path metric algorithm: 0x%x\n",
3110                     meshconf->conf_pmetid);
3111                 return 1;
3112         }
3113         if (meshconf->conf_ccid != 0) {
3114                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3115                     "unknown congestion control algorithm: 0x%x\n",
3116                     meshconf->conf_ccid);
3117                 return 1;
3118         }
3119         if (meshconf->conf_syncid != IEEE80211_MESHCONF_SYNC_NEIGHOFF) {
3120                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3121                     "unknown sync algorithm: 0x%x\n",
3122                     meshconf->conf_syncid);
3123                 return 1;
3124         }
3125         if (meshconf->conf_authid != 0) {
3126                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3127                     "unknown auth auth algorithm: 0x%x\n",
3128                     meshconf->conf_pselid);
3129                 return 1;
3130         }
3131         /* Not accepting peers */
3132         if (!(meshconf->conf_cap & IEEE80211_MESHCONF_CAP_AP)) {
3133                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3134                     "not accepting peers: 0x%x\n", meshconf->conf_cap);
3135                 return 1;
3136         }
3137         return 0;
3138 }
3139
3140 static int
3141 mesh_verify_meshpeer(struct ieee80211vap *vap, uint8_t subtype,
3142     const uint8_t *ie)
3143 {
3144         const struct ieee80211_meshpeer_ie *meshpeer =
3145             (const struct ieee80211_meshpeer_ie *) ie;
3146
3147         if (meshpeer == NULL ||
3148             meshpeer->peer_len < IEEE80211_MPM_BASE_SZ ||
3149             meshpeer->peer_len > IEEE80211_MPM_MAX_SZ)
3150                 return 1;
3151         if (meshpeer->peer_proto != IEEE80211_MPPID_MPM) {
3152                 IEEE80211_DPRINTF(vap,
3153                     IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
3154                     "Only MPM protocol is supported (proto: 0x%02X)",
3155                     meshpeer->peer_proto);
3156                 return 1;
3157         }
3158         switch (subtype) {
3159         case IEEE80211_ACTION_MESHPEERING_OPEN:
3160                 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ)
3161                         return 1;
3162                 break;
3163         case IEEE80211_ACTION_MESHPEERING_CONFIRM:
3164                 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ + 2)
3165                         return 1;
3166                 break;
3167         case IEEE80211_ACTION_MESHPEERING_CLOSE:
3168                 if (meshpeer->peer_len < IEEE80211_MPM_BASE_SZ + 2)
3169                         return 1;
3170                 if (meshpeer->peer_len == (IEEE80211_MPM_BASE_SZ + 2) &&
3171                     meshpeer->peer_linkid != 0)
3172                         return 1;
3173                 if (meshpeer->peer_rcode == 0)
3174                         return 1;
3175                 break;
3176         }
3177         return 0;
3178 }
3179
3180 /*
3181  * Add a Mesh ID IE to a frame.
3182  */
3183 uint8_t *
3184 ieee80211_add_meshid(uint8_t *frm, struct ieee80211vap *vap)
3185 {
3186         struct ieee80211_mesh_state *ms = vap->iv_mesh;
3187
3188         KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a mbss vap"));
3189
3190         *frm++ = IEEE80211_ELEMID_MESHID;
3191         *frm++ = ms->ms_idlen;
3192         memcpy(frm, ms->ms_id, ms->ms_idlen);
3193         return frm + ms->ms_idlen;
3194 }
3195
3196 /*
3197  * Add a Mesh Configuration IE to a frame.
3198  * For now just use HWMP routing, Airtime link metric, Null Congestion
3199  * Signaling, Null Sync Protocol and Null Authentication.
3200  */
3201 uint8_t *
3202 ieee80211_add_meshconf(uint8_t *frm, struct ieee80211vap *vap)
3203 {
3204         const struct ieee80211_mesh_state *ms = vap->iv_mesh;
3205         uint16_t caps;
3206
3207         KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap"));
3208
3209         *frm++ = IEEE80211_ELEMID_MESHCONF;
3210         *frm++ = IEEE80211_MESH_CONF_SZ;
3211         *frm++ = ms->ms_ppath->mpp_ie;          /* path selection */
3212         *frm++ = ms->ms_pmetric->mpm_ie;        /* link metric */
3213         *frm++ = IEEE80211_MESHCONF_CC_DISABLED;
3214         *frm++ = IEEE80211_MESHCONF_SYNC_NEIGHOFF;
3215         *frm++ = IEEE80211_MESHCONF_AUTH_DISABLED;
3216         /* NB: set the number of neighbors before the rest */
3217         *frm = (ms->ms_neighbors > IEEE80211_MESH_MAX_NEIGHBORS ?
3218             IEEE80211_MESH_MAX_NEIGHBORS : ms->ms_neighbors) << 1;
3219         if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE)
3220                 *frm |= IEEE80211_MESHCONF_FORM_GATE;
3221         frm += 1;
3222         caps = 0;
3223         if (ms->ms_flags & IEEE80211_MESHFLAGS_AP)
3224                 caps |= IEEE80211_MESHCONF_CAP_AP;
3225         if (ms->ms_flags & IEEE80211_MESHFLAGS_FWD)
3226                 caps |= IEEE80211_MESHCONF_CAP_FWRD;
3227         *frm++ = caps;
3228         return frm;
3229 }
3230
3231 /*
3232  * Add a Mesh Peer Management IE to a frame.
3233  */
3234 uint8_t *
3235 ieee80211_add_meshpeer(uint8_t *frm, uint8_t subtype, uint16_t localid,
3236     uint16_t peerid, uint16_t reason)
3237 {
3238
3239         KASSERT(localid != 0, ("localid == 0"));
3240
3241         *frm++ = IEEE80211_ELEMID_MESHPEER;
3242         switch (subtype) {
3243         case IEEE80211_ACTION_MESHPEERING_OPEN:
3244                 *frm++ = IEEE80211_MPM_BASE_SZ;         /* length */
3245                 ADDSHORT(frm, IEEE80211_MPPID_MPM);     /* proto */
3246                 ADDSHORT(frm, localid);                 /* local ID */
3247                 break;
3248         case IEEE80211_ACTION_MESHPEERING_CONFIRM:
3249                 KASSERT(peerid != 0, ("sending peer confirm without peer id"));
3250                 *frm++ = IEEE80211_MPM_BASE_SZ + 2;     /* length */
3251                 ADDSHORT(frm, IEEE80211_MPPID_MPM);     /* proto */
3252                 ADDSHORT(frm, localid);                 /* local ID */
3253                 ADDSHORT(frm, peerid);                  /* peer ID */
3254                 break;
3255         case IEEE80211_ACTION_MESHPEERING_CLOSE:
3256                 if (peerid)
3257                         *frm++ = IEEE80211_MPM_MAX_SZ;  /* length */
3258                 else
3259                         *frm++ = IEEE80211_MPM_BASE_SZ + 2; /* length */
3260                 ADDSHORT(frm, IEEE80211_MPPID_MPM);     /* proto */
3261                 ADDSHORT(frm, localid); /* local ID */
3262                 if (peerid)
3263                         ADDSHORT(frm, peerid);  /* peer ID */
3264                 ADDSHORT(frm, reason);
3265                 break;
3266         }
3267         return frm;
3268 }
3269
3270 /*
3271  * Compute an Airtime Link Metric for the link with this node.
3272  *
3273  * Based on Draft 3.0 spec (11B.10, p.149).
3274  */
3275 /*
3276  * Max 802.11s overhead.
3277  */
3278 #define IEEE80211_MESH_MAXOVERHEAD \
3279         (sizeof(struct ieee80211_qosframe_addr4) \
3280          + sizeof(struct ieee80211_meshcntl_ae10) \
3281         + sizeof(struct llc) \
3282         + IEEE80211_ADDR_LEN \
3283         + IEEE80211_WEP_IVLEN \
3284         + IEEE80211_WEP_KIDLEN \
3285         + IEEE80211_WEP_CRCLEN \
3286         + IEEE80211_WEP_MICLEN \
3287         + IEEE80211_CRC_LEN)
3288 uint32_t
3289 mesh_airtime_calc(struct ieee80211_node *ni)
3290 {
3291 #define M_BITS 8
3292 #define S_FACTOR (2 * M_BITS)
3293         struct ieee80211com *ic = ni->ni_ic;
3294         struct ifnet *ifp = ni->ni_vap->iv_ifp;
3295         const static int nbits = 8192 << M_BITS;
3296         uint32_t overhead, rate, errrate;
3297         uint64_t res;
3298
3299         /* Time to transmit a frame */
3300         rate = ni->ni_txrate;
3301         overhead = ieee80211_compute_duration(ic->ic_rt,
3302             ifp->if_mtu + IEEE80211_MESH_MAXOVERHEAD, rate, 0) << M_BITS;
3303         /* Error rate in percentage */
3304         /* XXX assuming small failures are ok */
3305         errrate = (((ifp->if_get_counter(ifp, IFCOUNTER_OERRORS) +
3306             ifp->if_get_counter(ifp, IFCOUNTER_IERRORS)) / 100) << M_BITS)
3307             / 100;
3308         res = (overhead + (nbits / rate)) *
3309             ((1 << S_FACTOR) / ((1 << M_BITS) - errrate));
3310
3311         return (uint32_t)(res >> S_FACTOR);
3312 #undef M_BITS
3313 #undef S_FACTOR
3314 }
3315
3316 /*
3317  * Add a Mesh Link Metric report IE to a frame.
3318  */
3319 uint8_t *
3320 ieee80211_add_meshlmetric(uint8_t *frm, uint8_t flags, uint32_t metric)
3321 {
3322         *frm++ = IEEE80211_ELEMID_MESHLINK;
3323         *frm++ = 5;
3324         *frm++ = flags;
3325         ADDWORD(frm, metric);
3326         return frm;
3327 }
3328
3329 /*
3330  * Add a Mesh Gate Announcement IE to a frame.
3331  */
3332 uint8_t *
3333 ieee80211_add_meshgate(uint8_t *frm, struct ieee80211_meshgann_ie *ie)
3334 {
3335         *frm++ = IEEE80211_ELEMID_MESHGANN; /* ie */
3336         *frm++ = IEEE80211_MESHGANN_BASE_SZ; /* len */
3337         *frm++ = ie->gann_flags;
3338         *frm++ = ie->gann_hopcount;
3339         *frm++ = ie->gann_ttl;
3340         IEEE80211_ADDR_COPY(frm, ie->gann_addr);
3341         frm += 6;
3342         ADDWORD(frm, ie->gann_seq);
3343         ADDSHORT(frm, ie->gann_interval);
3344         return frm;
3345 }
3346 #undef ADDSHORT
3347 #undef ADDWORD
3348
3349 /*
3350  * Initialize any mesh-specific node state.
3351  */
3352 void
3353 ieee80211_mesh_node_init(struct ieee80211vap *vap, struct ieee80211_node *ni)
3354 {
3355         ni->ni_flags |= IEEE80211_NODE_QOS;
3356         callout_init(&ni->ni_mltimer, 1);
3357         callout_init(&ni->ni_mlhtimer, 1);
3358 }
3359
3360 /*
3361  * Cleanup any mesh-specific node state.
3362  */
3363 void
3364 ieee80211_mesh_node_cleanup(struct ieee80211_node *ni)
3365 {
3366         struct ieee80211vap *vap = ni->ni_vap;
3367         struct ieee80211_mesh_state *ms = vap->iv_mesh;
3368
3369         callout_drain(&ni->ni_mltimer);
3370         callout_drain(&ni->ni_mlhtimer);
3371         /* NB: short-circuit callbacks after mesh_vdetach */
3372         if (vap->iv_mesh != NULL)
3373                 ms->ms_ppath->mpp_peerdown(ni);
3374 }
3375
3376 void
3377 ieee80211_parse_meshid(struct ieee80211_node *ni, const uint8_t *ie)
3378 {
3379         ni->ni_meshidlen = ie[1];
3380         memcpy(ni->ni_meshid, ie + 2, ie[1]);
3381 }
3382
3383 /*
3384  * Setup mesh-specific node state on neighbor discovery.
3385  */
3386 void
3387 ieee80211_mesh_init_neighbor(struct ieee80211_node *ni,
3388         const struct ieee80211_frame *wh,
3389         const struct ieee80211_scanparams *sp)
3390 {
3391         ieee80211_parse_meshid(ni, sp->meshid);
3392 }
3393
3394 void
3395 ieee80211_mesh_update_beacon(struct ieee80211vap *vap,
3396         struct ieee80211_beacon_offsets *bo)
3397 {
3398         KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap"));
3399
3400         if (isset(bo->bo_flags, IEEE80211_BEACON_MESHCONF)) {
3401                 (void)ieee80211_add_meshconf(bo->bo_meshconf, vap);
3402                 clrbit(bo->bo_flags, IEEE80211_BEACON_MESHCONF);
3403         }
3404 }
3405
3406 static int
3407 mesh_ioctl_get80211(struct ieee80211vap *vap, struct ieee80211req *ireq)
3408 {
3409         struct ieee80211_mesh_state *ms = vap->iv_mesh;
3410         uint8_t tmpmeshid[IEEE80211_NWID_LEN];
3411         struct ieee80211_mesh_route *rt;
3412         struct ieee80211req_mesh_route *imr;
3413         size_t len, off;
3414         uint8_t *p;
3415         int error;
3416
3417         if (vap->iv_opmode != IEEE80211_M_MBSS)
3418                 return ENOSYS;
3419
3420         error = 0;
3421         switch (ireq->i_type) {
3422         case IEEE80211_IOC_MESH_ID:
3423                 ireq->i_len = ms->ms_idlen;
3424                 memcpy(tmpmeshid, ms->ms_id, ireq->i_len);
3425                 error = copyout(tmpmeshid, ireq->i_data, ireq->i_len);
3426                 break;
3427         case IEEE80211_IOC_MESH_AP:
3428                 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_AP) != 0;
3429                 break;
3430         case IEEE80211_IOC_MESH_FWRD:
3431                 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) != 0;
3432                 break;
3433         case IEEE80211_IOC_MESH_GATE:
3434                 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) != 0;
3435                 break;
3436         case IEEE80211_IOC_MESH_TTL:
3437                 ireq->i_val = ms->ms_ttl;
3438                 break;
3439         case IEEE80211_IOC_MESH_RTCMD:
3440                 switch (ireq->i_val) {
3441                 case IEEE80211_MESH_RTCMD_LIST:
3442                         len = 0;
3443                         MESH_RT_LOCK(ms);
3444                         TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) {
3445                                 len += sizeof(*imr);
3446                         }
3447                         MESH_RT_UNLOCK(ms);
3448                         if (len > ireq->i_len || ireq->i_len < sizeof(*imr)) {
3449                                 ireq->i_len = len;
3450                                 return ENOMEM;
3451                         }
3452                         ireq->i_len = len;
3453                         /* XXX M_WAIT? */
3454                         p = IEEE80211_MALLOC(len, M_TEMP,
3455                             IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
3456                         if (p == NULL)
3457                                 return ENOMEM;
3458                         off = 0;
3459                         MESH_RT_LOCK(ms);
3460                         TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) {
3461                                 if (off >= len)
3462                                         break;
3463                                 imr = (struct ieee80211req_mesh_route *)
3464                                     (p + off);
3465                                 IEEE80211_ADDR_COPY(imr->imr_dest,
3466                                     rt->rt_dest);
3467                                 IEEE80211_ADDR_COPY(imr->imr_nexthop,
3468                                     rt->rt_nexthop);
3469                                 imr->imr_metric = rt->rt_metric;
3470                                 imr->imr_nhops = rt->rt_nhops;
3471                                 imr->imr_lifetime =
3472                                     ieee80211_mesh_rt_update(rt, 0);
3473                                 imr->imr_lastmseq = rt->rt_lastmseq;
3474                                 imr->imr_flags = rt->rt_flags; /* last */
3475                                 off += sizeof(*imr);
3476                         }
3477                         MESH_RT_UNLOCK(ms);
3478                         error = copyout(p, (uint8_t *)ireq->i_data,
3479                             ireq->i_len);
3480                         IEEE80211_FREE(p, M_TEMP);
3481                         break;
3482                 case IEEE80211_MESH_RTCMD_FLUSH:
3483                 case IEEE80211_MESH_RTCMD_ADD:
3484                 case IEEE80211_MESH_RTCMD_DELETE:
3485                         return EINVAL;
3486                 default:
3487                         return ENOSYS;
3488                 }
3489                 break;
3490         case IEEE80211_IOC_MESH_PR_METRIC:
3491                 len = strlen(ms->ms_pmetric->mpm_descr);
3492                 if (ireq->i_len < len)
3493                         return EINVAL;
3494                 ireq->i_len = len;
3495                 error = copyout(ms->ms_pmetric->mpm_descr,
3496                     (uint8_t *)ireq->i_data, len);
3497                 break;
3498         case IEEE80211_IOC_MESH_PR_PATH:
3499                 len = strlen(ms->ms_ppath->mpp_descr);
3500                 if (ireq->i_len < len)
3501                         return EINVAL;
3502                 ireq->i_len = len;
3503                 error = copyout(ms->ms_ppath->mpp_descr,
3504                     (uint8_t *)ireq->i_data, len);
3505                 break;
3506         default:
3507                 return ENOSYS;
3508         }
3509
3510         return error;
3511 }
3512 IEEE80211_IOCTL_GET(mesh, mesh_ioctl_get80211);
3513
3514 static int
3515 mesh_ioctl_set80211(struct ieee80211vap *vap, struct ieee80211req *ireq)
3516 {
3517         struct ieee80211_mesh_state *ms = vap->iv_mesh;
3518         uint8_t tmpmeshid[IEEE80211_NWID_LEN];
3519         uint8_t tmpaddr[IEEE80211_ADDR_LEN];
3520         char tmpproto[IEEE80211_MESH_PROTO_DSZ];
3521         int error;
3522
3523         if (vap->iv_opmode != IEEE80211_M_MBSS)
3524                 return ENOSYS;
3525
3526         error = 0;
3527         switch (ireq->i_type) {
3528         case IEEE80211_IOC_MESH_ID:
3529                 if (ireq->i_val != 0 || ireq->i_len > IEEE80211_MESHID_LEN)
3530                         return EINVAL;
3531                 error = copyin(ireq->i_data, tmpmeshid, ireq->i_len);
3532                 if (error != 0)
3533                         break;
3534                 memset(ms->ms_id, 0, IEEE80211_NWID_LEN);
3535                 ms->ms_idlen = ireq->i_len;
3536                 memcpy(ms->ms_id, tmpmeshid, ireq->i_len);
3537                 error = ENETRESET;
3538                 break;
3539         case IEEE80211_IOC_MESH_AP:
3540                 if (ireq->i_val)
3541                         ms->ms_flags |= IEEE80211_MESHFLAGS_AP;
3542                 else
3543                         ms->ms_flags &= ~IEEE80211_MESHFLAGS_AP;
3544                 error = ENETRESET;
3545                 break;
3546         case IEEE80211_IOC_MESH_FWRD:
3547                 if (ireq->i_val)
3548                         ms->ms_flags |= IEEE80211_MESHFLAGS_FWD;
3549                 else
3550                         ms->ms_flags &= ~IEEE80211_MESHFLAGS_FWD;
3551                 mesh_gatemode_setup(vap);
3552                 break;
3553         case IEEE80211_IOC_MESH_GATE:
3554                 if (ireq->i_val)
3555                         ms->ms_flags |= IEEE80211_MESHFLAGS_GATE;
3556                 else
3557                         ms->ms_flags &= ~IEEE80211_MESHFLAGS_GATE;
3558                 break;
3559         case IEEE80211_IOC_MESH_TTL:
3560                 ms->ms_ttl = (uint8_t) ireq->i_val;
3561                 break;
3562         case IEEE80211_IOC_MESH_RTCMD:
3563                 switch (ireq->i_val) {
3564                 case IEEE80211_MESH_RTCMD_LIST:
3565                         return EINVAL;
3566                 case IEEE80211_MESH_RTCMD_FLUSH:
3567                         ieee80211_mesh_rt_flush(vap);
3568                         break;
3569                 case IEEE80211_MESH_RTCMD_ADD:
3570                         if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ireq->i_data) ||
3571                             IEEE80211_ADDR_EQ(broadcastaddr, ireq->i_data))
3572                                 return EINVAL;
3573                         error = copyin(ireq->i_data, &tmpaddr,
3574                             IEEE80211_ADDR_LEN);
3575                         if (error == 0)
3576                                 ieee80211_mesh_discover(vap, tmpaddr, NULL);
3577                         break;
3578                 case IEEE80211_MESH_RTCMD_DELETE:
3579                         ieee80211_mesh_rt_del(vap, ireq->i_data);
3580                         break;
3581                 default:
3582                         return ENOSYS;
3583                 }
3584                 break;
3585         case IEEE80211_IOC_MESH_PR_METRIC:
3586                 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto));
3587                 if (error == 0) {
3588                         error = mesh_select_proto_metric(vap, tmpproto);
3589                         if (error == 0)
3590                                 error = ENETRESET;
3591                 }
3592                 break;
3593         case IEEE80211_IOC_MESH_PR_PATH:
3594                 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto));
3595                 if (error == 0) {
3596                         error = mesh_select_proto_path(vap, tmpproto);
3597                         if (error == 0)
3598                                 error = ENETRESET;
3599                 }
3600                 break;
3601         default:
3602                 return ENOSYS;
3603         }
3604         return error;
3605 }
3606 IEEE80211_IOCTL_SET(mesh, mesh_ioctl_set80211);