sys/net80211/ieee80211_mesh.c

   1 /*-
   2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
   3  *
   4  * Copyright (c) 2009 The FreeBSD Foundation
   5  * All rights reserved.
   6  *
   7  * This software was developed by Rui Paulo under sponsorship from the
   8  * FreeBSD Foundation.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  */
  31 #include <sys/cdefs.h>
  32 #ifdef __FreeBSD__
  33 __FBSDID("$FreeBSD$");
  34 #endif
  35
  36 /*
  37  * IEEE 802.11s Mesh Point (MBSS) support.
  38  *
  39  * Based on March 2009, D3.0 802.11s draft spec.
  40  */
  41 #include "opt_inet.h"
  42 #include "opt_wlan.h"
  43
  44 #include <sys/param.h>
  45 #include <sys/systm.h>
  46 #include <sys/mbuf.h>
  47 #include <sys/malloc.h>
  48 #include <sys/kernel.h>
  49
  50 #include <sys/socket.h>
  51 #include <sys/sockio.h>
  52 #include <sys/endian.h>
  53 #include <sys/errno.h>
  54 #include <sys/proc.h>
  55 #include <sys/sysctl.h>
  56
  57 #include <net/bpf.h>
  58 #include <net/if.h>
  59 #include <net/if_var.h>
  60 #include <net/if_media.h>
  61 #include <net/if_llc.h>
  62 #include <net/ethernet.h>
  63
  64 #include <net80211/ieee80211_var.h>
  65 #include <net80211/ieee80211_action.h>
  66 #ifdef IEEE80211_SUPPORT_SUPERG
  67 #include <net80211/ieee80211_superg.h>
  68 #endif
  69 #include <net80211/ieee80211_input.h>
  70 #include <net80211/ieee80211_mesh.h>
  71
  72 static void     mesh_rt_flush_invalid(struct ieee80211vap *);
  73 static int      mesh_select_proto_path(struct ieee80211vap *, const char *);
  74 static int      mesh_select_proto_metric(struct ieee80211vap *, const char *);
  75 static void     mesh_vattach(struct ieee80211vap *);
  76 static int      mesh_newstate(struct ieee80211vap *, enum ieee80211_state, int);
  77 static void     mesh_rt_cleanup_cb(void *);
  78 static void     mesh_gatemode_setup(struct ieee80211vap *);
  79 static void     mesh_gatemode_cb(void *);
  80 static void     mesh_linkchange(struct ieee80211_node *,
  81                     enum ieee80211_mesh_mlstate);
  82 static void     mesh_checkid(void *, struct ieee80211_node *);
  83 static uint32_t mesh_generateid(struct ieee80211vap *);
  84 static int      mesh_checkpseq(struct ieee80211vap *,
  85                     const uint8_t [IEEE80211_ADDR_LEN], uint32_t);
  86 static void     mesh_transmit_to_gate(struct ieee80211vap *, struct mbuf *,
  87                     struct ieee80211_mesh_route *);
  88 static void     mesh_forward(struct ieee80211vap *, struct mbuf *,
  89                     const struct ieee80211_meshcntl *);
  90 static int      mesh_input(struct ieee80211_node *, struct mbuf *,
  91                     const struct ieee80211_rx_stats *rxs, int, int);
  92 static void     mesh_recv_mgmt(struct ieee80211_node *, struct mbuf *, int,
  93                     const struct ieee80211_rx_stats *rxs, int, int);
  94 static void     mesh_recv_ctl(struct ieee80211_node *, struct mbuf *, int);
  95 static void     mesh_peer_timeout_setup(struct ieee80211_node *);
  96 static void     mesh_peer_timeout_backoff(struct ieee80211_node *);
  97 static void     mesh_peer_timeout_cb(void *);
  98 static __inline void
  99                 mesh_peer_timeout_stop(struct ieee80211_node *);
 100 static int      mesh_verify_meshid(struct ieee80211vap *, const uint8_t *);
 101 static int      mesh_verify_meshconf(struct ieee80211vap *, const uint8_t *);
 102 static int      mesh_verify_meshpeer(struct ieee80211vap *, uint8_t,
 103                     const uint8_t *);
 104 uint32_t        mesh_airtime_calc(struct ieee80211_node *);
 105
 106 /*
 107  * Timeout values come from the specification and are in milliseconds.
 108  */
 109 static SYSCTL_NODE(_net_wlan, OID_AUTO, mesh, CTLFLAG_RD, 0,
 110     "IEEE 802.11s parameters");
 111 static int      ieee80211_mesh_gateint = -1;
 112 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, gateint, CTLTYPE_INT | CTLFLAG_RW,
 113     &ieee80211_mesh_gateint, 0, ieee80211_sysctl_msecs_ticks, "I",
 114     "mesh gate interval (ms)");
 115 static int ieee80211_mesh_retrytimeout = -1;
 116 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, retrytimeout, CTLTYPE_INT | CTLFLAG_RW,
 117     &ieee80211_mesh_retrytimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
 118     "Retry timeout (msec)");
 119 static int ieee80211_mesh_holdingtimeout = -1;
 120
 121 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, holdingtimeout, CTLTYPE_INT | CTLFLAG_RW,
 122     &ieee80211_mesh_holdingtimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
 123     "Holding state timeout (msec)");
 124 static int ieee80211_mesh_confirmtimeout = -1;
 125 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, confirmtimeout, CTLTYPE_INT | CTLFLAG_RW,
 126     &ieee80211_mesh_confirmtimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
 127     "Confirm state timeout (msec)");
 128 static int ieee80211_mesh_backofftimeout = -1;
 129 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, backofftimeout, CTLTYPE_INT | CTLFLAG_RW,
 130     &ieee80211_mesh_backofftimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
 131     "Backoff timeout (msec). This is to throutles peering forever when "
 132     "not receiving answer or is rejected by a neighbor");
 133 static int ieee80211_mesh_maxretries = 2;
 134 SYSCTL_INT(_net_wlan_mesh, OID_AUTO, maxretries, CTLFLAG_RW,
 135     &ieee80211_mesh_maxretries, 0,
 136     "Maximum retries during peer link establishment");
 137 static int ieee80211_mesh_maxholding = 2;
 138 SYSCTL_INT(_net_wlan_mesh, OID_AUTO, maxholding, CTLFLAG_RW,
 139     &ieee80211_mesh_maxholding, 0,
 140     "Maximum times we are allowed to transition to HOLDING state before "
 141     "backinoff during peer link establishment");
 142
 143 static const uint8_t broadcastaddr[IEEE80211_ADDR_LEN] =
 144         { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 145
 146 static  ieee80211_recv_action_func mesh_recv_action_meshpeering_open;
 147 static  ieee80211_recv_action_func mesh_recv_action_meshpeering_confirm;
 148 static  ieee80211_recv_action_func mesh_recv_action_meshpeering_close;
 149 static  ieee80211_recv_action_func mesh_recv_action_meshlmetric;
 150 static  ieee80211_recv_action_func mesh_recv_action_meshgate;
 151
 152 static  ieee80211_send_action_func mesh_send_action_meshpeering_open;
 153 static  ieee80211_send_action_func mesh_send_action_meshpeering_confirm;
 154 static  ieee80211_send_action_func mesh_send_action_meshpeering_close;
 155 static  ieee80211_send_action_func mesh_send_action_meshlmetric;
 156 static  ieee80211_send_action_func mesh_send_action_meshgate;
 157
 158 static const struct ieee80211_mesh_proto_metric mesh_metric_airtime = {
 159         .mpm_descr      = "AIRTIME",
 160         .mpm_ie         = IEEE80211_MESHCONF_METRIC_AIRTIME,
 161         .mpm_metric     = mesh_airtime_calc,
 162 };
 163
 164 static struct ieee80211_mesh_proto_path         mesh_proto_paths[4];
 165 static struct ieee80211_mesh_proto_metric       mesh_proto_metrics[4];
 166
 167 MALLOC_DEFINE(M_80211_MESH_PREQ, "80211preq", "802.11 MESH Path Request frame");
 168 MALLOC_DEFINE(M_80211_MESH_PREP, "80211prep", "802.11 MESH Path Reply frame");
 169 MALLOC_DEFINE(M_80211_MESH_PERR, "80211perr", "802.11 MESH Path Error frame");
 170
 171 /* The longer one of the lifetime should be stored as new lifetime */
 172 #define MESH_ROUTE_LIFETIME_MAX(a, b)   (a > b ? a : b)
 173
 174 MALLOC_DEFINE(M_80211_MESH_RT, "80211mesh_rt", "802.11s routing table");
 175 MALLOC_DEFINE(M_80211_MESH_GT_RT, "80211mesh_gt", "802.11s known gates table");
 176
 177 /*
 178  * Helper functions to manipulate the Mesh routing table.
 179  */
 180
 181 static struct ieee80211_mesh_route *
 182 mesh_rt_find_locked(struct ieee80211_mesh_state *ms,
 183     const uint8_t dest[IEEE80211_ADDR_LEN])
 184 {
 185         struct ieee80211_mesh_route *rt;
 186
 187         MESH_RT_LOCK_ASSERT(ms);
 188
 189         TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) {
 190                 if (IEEE80211_ADDR_EQ(dest, rt->rt_dest))
 191                         return rt;
 192         }
 193         return NULL;
 194 }
 195
 196 static struct ieee80211_mesh_route *
 197 mesh_rt_add_locked(struct ieee80211vap *vap,
 198     const uint8_t dest[IEEE80211_ADDR_LEN])
 199 {
 200         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 201         struct ieee80211_mesh_route *rt;
 202
 203         KASSERT(!IEEE80211_ADDR_EQ(broadcastaddr, dest),
 204             ("%s: adding broadcast to the routing table", __func__));
 205
 206         MESH_RT_LOCK_ASSERT(ms);
 207
 208         rt = IEEE80211_MALLOC(ALIGN(sizeof(struct ieee80211_mesh_route)) +
 209             ms->ms_ppath->mpp_privlen, M_80211_MESH_RT,
 210             IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
 211         if (rt != NULL) {
 212                 rt->rt_vap = vap;
 213                 IEEE80211_ADDR_COPY(rt->rt_dest, dest);
 214                 rt->rt_priv = (void *)ALIGN(&rt[1]);
 215                 MESH_RT_ENTRY_LOCK_INIT(rt, "MBSS_RT");
 216                 callout_init(&rt->rt_discovery, 1);
 217                 rt->rt_updtime = ticks; /* create time */
 218                 TAILQ_INSERT_TAIL(&ms->ms_routes, rt, rt_next);
 219         }
 220         return rt;
 221 }
 222
 223 struct ieee80211_mesh_route *
 224 ieee80211_mesh_rt_find(struct ieee80211vap *vap,
 225     const uint8_t dest[IEEE80211_ADDR_LEN])
 226 {
 227         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 228         struct ieee80211_mesh_route *rt;
 229
 230         MESH_RT_LOCK(ms);
 231         rt = mesh_rt_find_locked(ms, dest);
 232         MESH_RT_UNLOCK(ms);
 233         return rt;
 234 }
 235
 236 struct ieee80211_mesh_route *
 237 ieee80211_mesh_rt_add(struct ieee80211vap *vap,
 238     const uint8_t dest[IEEE80211_ADDR_LEN])
 239 {
 240         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 241         struct ieee80211_mesh_route *rt;
 242
 243         KASSERT(ieee80211_mesh_rt_find(vap, dest) == NULL,
 244             ("%s: duplicate entry in the routing table", __func__));
 245         KASSERT(!IEEE80211_ADDR_EQ(vap->iv_myaddr, dest),
 246             ("%s: adding self to the routing table", __func__));
 247
 248         MESH_RT_LOCK(ms);
 249         rt = mesh_rt_add_locked(vap, dest);
 250         MESH_RT_UNLOCK(ms);
 251         return rt;
 252 }
 253
 254 /*
 255  * Update the route lifetime and returns the updated lifetime.
 256  * If new_lifetime is zero and route is timedout it will be invalidated.
 257  * new_lifetime is in msec
 258  */
 259 int
 260 ieee80211_mesh_rt_update(struct ieee80211_mesh_route *rt, int new_lifetime)
 261 {
 262         int timesince, now;
 263         uint32_t lifetime = 0;
 264
 265         KASSERT(rt != NULL, ("route is NULL"));
 266
 267         now = ticks;
 268         MESH_RT_ENTRY_LOCK(rt);
 269
 270         /* dont clobber a proxy entry gated by us */
 271         if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY && rt->rt_nhops == 0) {
 272                 MESH_RT_ENTRY_UNLOCK(rt);
 273                 return rt->rt_lifetime;
 274         }
 275
 276         timesince = ticks_to_msecs(now - rt->rt_updtime);
 277         rt->rt_updtime = now;
 278         if (timesince >= rt->rt_lifetime) {
 279                 if (new_lifetime != 0) {
 280                         rt->rt_lifetime = new_lifetime;
 281                 }
 282                 else {
 283                         rt->rt_flags &= ~IEEE80211_MESHRT_FLAGS_VALID;
 284                         rt->rt_lifetime = 0;
 285                 }
 286         } else {
 287                 /* update what is left of lifetime */
 288                 rt->rt_lifetime = rt->rt_lifetime - timesince;
 289                 rt->rt_lifetime  = MESH_ROUTE_LIFETIME_MAX(
 290                         new_lifetime, rt->rt_lifetime);
 291         }
 292         lifetime = rt->rt_lifetime;
 293         MESH_RT_ENTRY_UNLOCK(rt);
 294
 295         return lifetime;
 296 }
 297
 298 /*
 299  * Add a proxy route (as needed) for the specified destination.
 300  */
 301 void
 302 ieee80211_mesh_proxy_check(struct ieee80211vap *vap,
 303     const uint8_t dest[IEEE80211_ADDR_LEN])
 304 {
 305         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 306         struct ieee80211_mesh_route *rt;
 307
 308         MESH_RT_LOCK(ms);
 309         rt = mesh_rt_find_locked(ms, dest);
 310         if (rt == NULL) {
 311                 rt = mesh_rt_add_locked(vap, dest);
 312                 if (rt == NULL) {
 313                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
 314                             "%s", "unable to add proxy entry");
 315                         vap->iv_stats.is_mesh_rtaddfailed++;
 316                 } else {
 317                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
 318                             "%s", "add proxy entry");
 319                         IEEE80211_ADDR_COPY(rt->rt_mesh_gate, vap->iv_myaddr);
 320                         IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr);
 321                         rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID
 322                                      |  IEEE80211_MESHRT_FLAGS_PROXY;
 323                 }
 324         } else if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) {
 325                 KASSERT(rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY,
 326                     ("no proxy flag for poxy entry"));
 327                 struct ieee80211com *ic = vap->iv_ic;
 328                 /*
 329                  * Fix existing entry created by received frames from
 330                  * stations that have some memory of dest.  We also
 331                  * flush any frames held on the staging queue; delivering
 332                  * them is too much trouble right now.
 333                  */
 334                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
 335                     "%s", "fix proxy entry");
 336                 IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr);
 337                 rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID
 338                              |  IEEE80211_MESHRT_FLAGS_PROXY;
 339                 /* XXX belongs in hwmp */
 340                 ieee80211_ageq_drain_node(&ic->ic_stageq,
 341                    (void *)(uintptr_t) ieee80211_mac_hash(ic, dest));
 342                 /* XXX stat? */
 343         }
 344         MESH_RT_UNLOCK(ms);
 345 }
 346
 347 static __inline void
 348 mesh_rt_del(struct ieee80211_mesh_state *ms, struct ieee80211_mesh_route *rt)
 349 {
 350         TAILQ_REMOVE(&ms->ms_routes, rt, rt_next);
 351         /*
 352          * Grab the lock before destroying it, to be sure no one else
 353          * is holding the route.
 354          */
 355         MESH_RT_ENTRY_LOCK(rt);
 356         callout_drain(&rt->rt_discovery);
 357         MESH_RT_ENTRY_LOCK_DESTROY(rt);
 358         IEEE80211_FREE(rt, M_80211_MESH_RT);
 359 }
 360
 361 void
 362 ieee80211_mesh_rt_del(struct ieee80211vap *vap,
 363     const uint8_t dest[IEEE80211_ADDR_LEN])
 364 {
 365         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 366         struct ieee80211_mesh_route *rt, *next;
 367
 368         MESH_RT_LOCK(ms);
 369         TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) {
 370                 if (IEEE80211_ADDR_EQ(rt->rt_dest, dest)) {
 371                         if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) {
 372                                 ms->ms_ppath->mpp_senderror(vap, dest, rt,
 373                                     IEEE80211_REASON_MESH_PERR_NO_PROXY);
 374                         } else {
 375                                 ms->ms_ppath->mpp_senderror(vap, dest, rt,
 376                                     IEEE80211_REASON_MESH_PERR_DEST_UNREACH);
 377                         }
 378                         mesh_rt_del(ms, rt);
 379                         MESH_RT_UNLOCK(ms);
 380                         return;
 381                 }
 382         }
 383         MESH_RT_UNLOCK(ms);
 384 }
 385
 386 void
 387 ieee80211_mesh_rt_flush(struct ieee80211vap *vap)
 388 {
 389         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 390         struct ieee80211_mesh_route *rt, *next;
 391
 392         if (ms == NULL)
 393                 return;
 394         MESH_RT_LOCK(ms);
 395         TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next)
 396                 mesh_rt_del(ms, rt);
 397         MESH_RT_UNLOCK(ms);
 398 }
 399
 400 void
 401 ieee80211_mesh_rt_flush_peer(struct ieee80211vap *vap,
 402     const uint8_t peer[IEEE80211_ADDR_LEN])
 403 {
 404         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 405         struct ieee80211_mesh_route *rt, *next;
 406
 407         MESH_RT_LOCK(ms);
 408         TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) {
 409                 if (IEEE80211_ADDR_EQ(rt->rt_nexthop, peer))
 410                         mesh_rt_del(ms, rt);
 411         }
 412         MESH_RT_UNLOCK(ms);
 413 }
 414
 415 /*
 416  * Flush expired routing entries, i.e. those in invalid state for
 417  * some time.
 418  */
 419 static void
 420 mesh_rt_flush_invalid(struct ieee80211vap *vap)
 421 {
 422         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 423         struct ieee80211_mesh_route *rt, *next;
 424
 425         if (ms == NULL)
 426                 return;
 427         MESH_RT_LOCK(ms);
 428         TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) {
 429                 /* Discover paths will be deleted by their own callout */
 430                 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_DISCOVER)
 431                         continue;
 432                 ieee80211_mesh_rt_update(rt, 0);
 433                 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0)
 434                         mesh_rt_del(ms, rt);
 435         }
 436         MESH_RT_UNLOCK(ms);
 437 }
 438
 439 int
 440 ieee80211_mesh_register_proto_path(const struct ieee80211_mesh_proto_path *mpp)
 441 {
 442         int i, firstempty = -1;
 443
 444         for (i = 0; i < nitems(mesh_proto_paths); i++) {
 445                 if (strncmp(mpp->mpp_descr, mesh_proto_paths[i].mpp_descr,
 446                     IEEE80211_MESH_PROTO_DSZ) == 0)
 447                         return EEXIST;
 448                 if (!mesh_proto_paths[i].mpp_active && firstempty == -1)
 449                         firstempty = i;
 450         }
 451         if (firstempty < 0)
 452                 return ENOSPC;
 453         memcpy(&mesh_proto_paths[firstempty], mpp, sizeof(*mpp));
 454         mesh_proto_paths[firstempty].mpp_active = 1;
 455         return 0;
 456 }
 457
 458 int
 459 ieee80211_mesh_register_proto_metric(const struct
 460     ieee80211_mesh_proto_metric *mpm)
 461 {
 462         int i, firstempty = -1;
 463
 464         for (i = 0; i < nitems(mesh_proto_metrics); i++) {
 465                 if (strncmp(mpm->mpm_descr, mesh_proto_metrics[i].mpm_descr,
 466                     IEEE80211_MESH_PROTO_DSZ) == 0)
 467                         return EEXIST;
 468                 if (!mesh_proto_metrics[i].mpm_active && firstempty == -1)
 469                         firstempty = i;
 470         }
 471         if (firstempty < 0)
 472                 return ENOSPC;
 473         memcpy(&mesh_proto_metrics[firstempty], mpm, sizeof(*mpm));
 474         mesh_proto_metrics[firstempty].mpm_active = 1;
 475         return 0;
 476 }
 477
 478 static int
 479 mesh_select_proto_path(struct ieee80211vap *vap, const char *name)
 480 {
 481         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 482         int i;
 483
 484         for (i = 0; i < nitems(mesh_proto_paths); i++) {
 485                 if (strcasecmp(mesh_proto_paths[i].mpp_descr, name) == 0) {
 486                         ms->ms_ppath = &mesh_proto_paths[i];
 487                         return 0;
 488                 }
 489         }
 490         return ENOENT;
 491 }
 492
 493 static int
 494 mesh_select_proto_metric(struct ieee80211vap *vap, const char *name)
 495 {
 496         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 497         int i;
 498
 499         for (i = 0; i < nitems(mesh_proto_metrics); i++) {
 500                 if (strcasecmp(mesh_proto_metrics[i].mpm_descr, name) == 0) {
 501                         ms->ms_pmetric = &mesh_proto_metrics[i];
 502                         return 0;
 503                 }
 504         }
 505         return ENOENT;
 506 }
 507
 508 static void
 509 mesh_gatemode_setup(struct ieee80211vap *vap)
 510 {
 511         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 512
 513         /*
 514          * NB: When a mesh gate is running as a ROOT it shall
 515          * not send out periodic GANNs but instead mark the
 516          * mesh gate flag for the corresponding proactive PREQ
 517          * and RANN frames.
 518          */
 519         if (ms->ms_flags & IEEE80211_MESHFLAGS_ROOT ||
 520             (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) == 0) {
 521                 callout_drain(&ms->ms_gatetimer);
 522                 return ;
 523         }
 524         callout_reset(&ms->ms_gatetimer, ieee80211_mesh_gateint,
 525             mesh_gatemode_cb, vap);
 526 }
 527
 528 static void
 529 mesh_gatemode_cb(void *arg)
 530 {
 531         struct ieee80211vap *vap = (struct ieee80211vap *)arg;
 532         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 533         struct ieee80211_meshgann_ie gann;
 534
 535         gann.gann_flags = 0; /* Reserved */
 536         gann.gann_hopcount = 0;
 537         gann.gann_ttl = ms->ms_ttl;
 538         IEEE80211_ADDR_COPY(gann.gann_addr, vap->iv_myaddr);
 539         gann.gann_seq = ms->ms_gateseq++;
 540         gann.gann_interval = ieee80211_mesh_gateint;
 541
 542         IEEE80211_NOTE(vap, IEEE80211_MSG_MESH, vap->iv_bss,
 543             "send broadcast GANN (seq %u)", gann.gann_seq);
 544
 545         ieee80211_send_action(vap->iv_bss, IEEE80211_ACTION_CAT_MESH,
 546             IEEE80211_ACTION_MESH_GANN, &gann);
 547         mesh_gatemode_setup(vap);
 548 }
 549
 550 static void
 551 ieee80211_mesh_init(void)
 552 {
 553
 554         memset(mesh_proto_paths, 0, sizeof(mesh_proto_paths));
 555         memset(mesh_proto_metrics, 0, sizeof(mesh_proto_metrics));
 556
 557         /*
 558          * Setup mesh parameters that depends on the clock frequency.
 559          */
 560         ieee80211_mesh_gateint = msecs_to_ticks(10000);
 561         ieee80211_mesh_retrytimeout = msecs_to_ticks(40);
 562         ieee80211_mesh_holdingtimeout = msecs_to_ticks(40);
 563         ieee80211_mesh_confirmtimeout = msecs_to_ticks(40);
 564         ieee80211_mesh_backofftimeout = msecs_to_ticks(5000);
 565
 566         /*
 567          * Register action frame handlers.
 568          */
 569         ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
 570             IEEE80211_ACTION_MESHPEERING_OPEN,
 571             mesh_recv_action_meshpeering_open);
 572         ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
 573             IEEE80211_ACTION_MESHPEERING_CONFIRM,
 574             mesh_recv_action_meshpeering_confirm);
 575         ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
 576             IEEE80211_ACTION_MESHPEERING_CLOSE,
 577             mesh_recv_action_meshpeering_close);
 578         ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESH,
 579             IEEE80211_ACTION_MESH_LMETRIC, mesh_recv_action_meshlmetric);
 580         ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESH,
 581             IEEE80211_ACTION_MESH_GANN, mesh_recv_action_meshgate);
 582
 583         ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
 584             IEEE80211_ACTION_MESHPEERING_OPEN,
 585             mesh_send_action_meshpeering_open);
 586         ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
 587             IEEE80211_ACTION_MESHPEERING_CONFIRM,
 588             mesh_send_action_meshpeering_confirm);
 589         ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
 590             IEEE80211_ACTION_MESHPEERING_CLOSE,
 591             mesh_send_action_meshpeering_close);
 592         ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESH,
 593             IEEE80211_ACTION_MESH_LMETRIC,
 594             mesh_send_action_meshlmetric);
 595         ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESH,
 596             IEEE80211_ACTION_MESH_GANN,
 597             mesh_send_action_meshgate);
 598
 599         /*
 600          * Register Airtime Link Metric.
 601          */
 602         ieee80211_mesh_register_proto_metric(&mesh_metric_airtime);
 603
 604 }
 605 SYSINIT(wlan_mesh, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_mesh_init, NULL);
 606
 607 void
 608 ieee80211_mesh_attach(struct ieee80211com *ic)
 609 {
 610         ic->ic_vattach[IEEE80211_M_MBSS] = mesh_vattach;
 611 }
 612
 613 void
 614 ieee80211_mesh_detach(struct ieee80211com *ic)
 615 {
 616 }
 617
 618 static void
 619 mesh_vdetach_peers(void *arg, struct ieee80211_node *ni)
 620 {
 621         struct ieee80211com *ic = ni->ni_ic;
 622         uint16_t args[3];
 623
 624         if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED) {
 625                 args[0] = ni->ni_mlpid;
 626                 args[1] = ni->ni_mllid;
 627                 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
 628                 ieee80211_send_action(ni,
 629                     IEEE80211_ACTION_CAT_SELF_PROT,
 630                     IEEE80211_ACTION_MESHPEERING_CLOSE,
 631                     args);
 632         }
 633         callout_drain(&ni->ni_mltimer);
 634         /* XXX belongs in hwmp */
 635         ieee80211_ageq_drain_node(&ic->ic_stageq,
 636            (void *)(uintptr_t) ieee80211_mac_hash(ic, ni->ni_macaddr));
 637 }
 638
 639 static void
 640 mesh_vdetach(struct ieee80211vap *vap)
 641 {
 642         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 643
 644         callout_drain(&ms->ms_cleantimer);
 645         ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_vdetach_peers,
 646             NULL);
 647         ieee80211_mesh_rt_flush(vap);
 648         MESH_RT_LOCK_DESTROY(ms);
 649         ms->ms_ppath->mpp_vdetach(vap);
 650         IEEE80211_FREE(vap->iv_mesh, M_80211_VAP);
 651         vap->iv_mesh = NULL;
 652 }
 653
 654 static void
 655 mesh_vattach(struct ieee80211vap *vap)
 656 {
 657         struct ieee80211_mesh_state *ms;
 658         vap->iv_newstate = mesh_newstate;
 659         vap->iv_input = mesh_input;
 660         vap->iv_opdetach = mesh_vdetach;
 661         vap->iv_recv_mgmt = mesh_recv_mgmt;
 662         vap->iv_recv_ctl = mesh_recv_ctl;
 663         ms = IEEE80211_MALLOC(sizeof(struct ieee80211_mesh_state), M_80211_VAP,
 664             IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
 665         if (ms == NULL) {
 666                 printf("%s: couldn't alloc MBSS state\n", __func__);
 667                 return;
 668         }
 669         vap->iv_mesh = ms;
 670         ms->ms_seq = 0;
 671         ms->ms_flags = (IEEE80211_MESHFLAGS_AP | IEEE80211_MESHFLAGS_FWD);
 672         ms->ms_ttl = IEEE80211_MESH_DEFAULT_TTL;
 673         TAILQ_INIT(&ms->ms_known_gates);
 674         TAILQ_INIT(&ms->ms_routes);
 675         MESH_RT_LOCK_INIT(ms, "MBSS");
 676         callout_init(&ms->ms_cleantimer, 1);
 677         callout_init(&ms->ms_gatetimer, 1);
 678         ms->ms_gateseq = 0;
 679         mesh_select_proto_metric(vap, "AIRTIME");
 680         KASSERT(ms->ms_pmetric, ("ms_pmetric == NULL"));
 681         mesh_select_proto_path(vap, "HWMP");
 682         KASSERT(ms->ms_ppath, ("ms_ppath == NULL"));
 683         ms->ms_ppath->mpp_vattach(vap);
 684 }
 685
 686 /*
 687  * IEEE80211_M_MBSS vap state machine handler.
 688  */
 689 static int
 690 mesh_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
 691 {
 692         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 693         struct ieee80211com *ic = vap->iv_ic;
 694         struct ieee80211_node *ni;
 695         enum ieee80211_state ostate;
 696
 697         IEEE80211_LOCK_ASSERT(ic);
 698
 699         ostate = vap->iv_state;
 700         IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n",
 701             __func__, ieee80211_state_name[ostate],
 702             ieee80211_state_name[nstate], arg);
 703         vap->iv_state = nstate;         /* state transition */
 704         if (ostate != IEEE80211_S_SCAN)
 705                 ieee80211_cancel_scan(vap);     /* background scan */
 706         ni = vap->iv_bss;                       /* NB: no reference held */
 707         if (nstate != IEEE80211_S_RUN && ostate == IEEE80211_S_RUN) {
 708                 callout_drain(&ms->ms_cleantimer);
 709                 callout_drain(&ms->ms_gatetimer);
 710         }
 711         switch (nstate) {
 712         case IEEE80211_S_INIT:
 713                 switch (ostate) {
 714                 case IEEE80211_S_SCAN:
 715                         ieee80211_cancel_scan(vap);
 716                         break;
 717                 case IEEE80211_S_CAC:
 718                         ieee80211_dfs_cac_stop(vap);
 719                         break;
 720                 case IEEE80211_S_RUN:
 721                         ieee80211_iterate_nodes(&ic->ic_sta,
 722                             mesh_vdetach_peers, NULL);
 723                         break;
 724                 default:
 725                         break;
 726                 }
 727                 if (ostate != IEEE80211_S_INIT) {
 728                         /* NB: optimize INIT -> INIT case */
 729                         ieee80211_reset_bss(vap);
 730                         ieee80211_mesh_rt_flush(vap);
 731                 }
 732                 break;
 733         case IEEE80211_S_SCAN:
 734                 switch (ostate) {
 735                 case IEEE80211_S_INIT:
 736                         if (vap->iv_des_chan != IEEE80211_CHAN_ANYC &&
 737                             !IEEE80211_IS_CHAN_RADAR(vap->iv_des_chan) &&
 738                             ms->ms_idlen != 0) {
 739                                 /*
 740                                  * Already have a channel and a mesh ID; bypass
 741                                  * the scan and startup immediately.
 742                                  */
 743                                 ieee80211_create_ibss(vap, vap->iv_des_chan);
 744                                 break;
 745                         }
 746                         /*
 747                          * Initiate a scan.  We can come here as a result
 748                          * of an IEEE80211_IOC_SCAN_REQ too in which case
 749                          * the vap will be marked with IEEE80211_FEXT_SCANREQ
 750                          * and the scan request parameters will be present
 751                          * in iv_scanreq.  Otherwise we do the default.
 752                         */
 753                         if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) {
 754                                 ieee80211_check_scan(vap,
 755                                     vap->iv_scanreq_flags,
 756                                     vap->iv_scanreq_duration,
 757                                     vap->iv_scanreq_mindwell,
 758                                     vap->iv_scanreq_maxdwell,
 759                                     vap->iv_scanreq_nssid, vap->iv_scanreq_ssid);
 760                                 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ;
 761                         } else
 762                                 ieee80211_check_scan_current(vap);
 763                         break;
 764                 default:
 765                         break;
 766                 }
 767                 break;
 768         case IEEE80211_S_CAC:
 769                 /*
 770                  * Start CAC on a DFS channel.  We come here when starting
 771                  * a bss on a DFS channel (see ieee80211_create_ibss).
 772                  */
 773                 ieee80211_dfs_cac_start(vap);
 774                 break;
 775         case IEEE80211_S_RUN:
 776                 switch (ostate) {
 777                 case IEEE80211_S_INIT:
 778                         /*
 779                          * Already have a channel; bypass the
 780                          * scan and startup immediately.
 781                          * Note that ieee80211_create_ibss will call
 782                          * back to do a RUN->RUN state change.
 783                          */
 784                         ieee80211_create_ibss(vap,
 785                             ieee80211_ht_adjust_channel(ic,
 786                                 ic->ic_curchan, vap->iv_flags_ht));
 787                         /* NB: iv_bss is changed on return */
 788                         break;
 789                 case IEEE80211_S_CAC:
 790                         /*
 791                          * NB: This is the normal state change when CAC
 792                          * expires and no radar was detected; no need to
 793                          * clear the CAC timer as it's already expired.
 794                          */
 795                         /* fall thru... */
 796                 case IEEE80211_S_CSA:
 797 #if 0
 798                         /*
 799                          * Shorten inactivity timer of associated stations
 800                          * to weed out sta's that don't follow a CSA.
 801                          */
 802                         ieee80211_iterate_nodes(&ic->ic_sta, sta_csa, vap);
 803 #endif
 804                         /*
 805                          * Update bss node channel to reflect where
 806                          * we landed after CSA.
 807                          */
 808                         ieee80211_node_set_chan(ni,
 809                             ieee80211_ht_adjust_channel(ic, ic->ic_curchan,
 810                                 ieee80211_htchanflags(ni->ni_chan)));
 811                         /* XXX bypass debug msgs */
 812                         break;
 813                 case IEEE80211_S_SCAN:
 814                 case IEEE80211_S_RUN:
 815 #ifdef IEEE80211_DEBUG
 816                         if (ieee80211_msg_debug(vap)) {
 817                                 ieee80211_note(vap,
 818                                     "synchronized with %s meshid ",
 819                                     ether_sprintf(ni->ni_meshid));
 820                                 ieee80211_print_essid(ni->ni_meshid,
 821                                     ni->ni_meshidlen);
 822                                 /* XXX MCS/HT */
 823                                 printf(" channel %d\n",
 824                                     ieee80211_chan2ieee(ic, ic->ic_curchan));
 825                         }
 826 #endif
 827                         break;
 828                 default:
 829                         break;
 830                 }
 831                 ieee80211_node_authorize(ni);
 832                 callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact,
 833                     mesh_rt_cleanup_cb, vap);
 834                 mesh_gatemode_setup(vap);
 835                 break;
 836         default:
 837                 break;
 838         }
 839         /* NB: ostate not nstate */
 840         ms->ms_ppath->mpp_newstate(vap, ostate, arg);
 841         return 0;
 842 }
 843
 844 static void
 845 mesh_rt_cleanup_cb(void *arg)
 846 {
 847         struct ieee80211vap *vap = arg;
 848         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 849
 850         mesh_rt_flush_invalid(vap);
 851         callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact,
 852             mesh_rt_cleanup_cb, vap);
 853 }
 854
 855 /*
 856  * Mark a mesh STA as gate and return a pointer to it.
 857  * If this is first time, we create a new gate route.
 858  * Always update the path route to this mesh gate.
 859  */
 860 struct ieee80211_mesh_gate_route *
 861 ieee80211_mesh_mark_gate(struct ieee80211vap *vap, const uint8_t *addr,
 862     struct ieee80211_mesh_route *rt)
 863 {
 864         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 865         struct ieee80211_mesh_gate_route *gr = NULL, *next;
 866         int found = 0;
 867
 868         MESH_RT_LOCK(ms);
 869         TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) {
 870                 if (IEEE80211_ADDR_EQ(gr->gr_addr, addr)) {
 871                         found = 1;
 872                         break;
 873                 }
 874         }
 875
 876         if (!found) {
 877                 /* New mesh gate add it to known table. */
 878                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, addr,
 879                     "%s", "stored new gate information from pro-PREQ.");
 880                 gr = IEEE80211_MALLOC(ALIGN(sizeof(struct ieee80211_mesh_gate_route)),
 881                     M_80211_MESH_GT_RT,
 882                     IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
 883                 IEEE80211_ADDR_COPY(gr->gr_addr, addr);
 884                 TAILQ_INSERT_TAIL(&ms->ms_known_gates, gr, gr_next);
 885         }
 886         gr->gr_route = rt;
 887         /* TODO: link from path route to gate route */
 888         MESH_RT_UNLOCK(ms);
 889
 890         return gr;
 891 }
 892
 893
 894 /*
 895  * Helper function to note the Mesh Peer Link FSM change.
 896  */
 897 static void
 898 mesh_linkchange(struct ieee80211_node *ni, enum ieee80211_mesh_mlstate state)
 899 {
 900         struct ieee80211vap *vap = ni->ni_vap;
 901         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 902 #ifdef IEEE80211_DEBUG
 903         static const char *meshlinkstates[] = {
 904                 [IEEE80211_NODE_MESH_IDLE]              = "IDLE",
 905                 [IEEE80211_NODE_MESH_OPENSNT]           = "OPEN SENT",
 906                 [IEEE80211_NODE_MESH_OPENRCV]           = "OPEN RECEIVED",
 907                 [IEEE80211_NODE_MESH_CONFIRMRCV]        = "CONFIRM RECEIVED",
 908                 [IEEE80211_NODE_MESH_ESTABLISHED]       = "ESTABLISHED",
 909                 [IEEE80211_NODE_MESH_HOLDING]           = "HOLDING"
 910         };
 911 #endif
 912         IEEE80211_NOTE(vap, IEEE80211_MSG_MESH,
 913             ni, "peer link: %s -> %s",
 914             meshlinkstates[ni->ni_mlstate], meshlinkstates[state]);
 915
 916         /* track neighbor count */
 917         if (state == IEEE80211_NODE_MESH_ESTABLISHED &&
 918             ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) {
 919                 KASSERT(ms->ms_neighbors < 65535, ("neighbor count overflow"));
 920                 ms->ms_neighbors++;
 921                 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF);
 922         } else if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED &&
 923             state != IEEE80211_NODE_MESH_ESTABLISHED) {
 924                 KASSERT(ms->ms_neighbors > 0, ("neighbor count 0"));
 925                 ms->ms_neighbors--;
 926                 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF);
 927         }
 928         ni->ni_mlstate = state;
 929         switch (state) {
 930         case IEEE80211_NODE_MESH_HOLDING:
 931                 ms->ms_ppath->mpp_peerdown(ni);
 932                 break;
 933         case IEEE80211_NODE_MESH_ESTABLISHED:
 934                 ieee80211_mesh_discover(vap, ni->ni_macaddr, NULL);
 935                 break;
 936         default:
 937                 break;
 938         }
 939 }
 940
 941 /*
 942  * Helper function to generate a unique local ID required for mesh
 943  * peer establishment.
 944  */
 945 static void
 946 mesh_checkid(void *arg, struct ieee80211_node *ni)
 947 {
 948         uint16_t *r = arg;
 949
 950         if (*r == ni->ni_mllid)
 951                 *(uint16_t *)arg = 0;
 952 }
 953
 954 static uint32_t
 955 mesh_generateid(struct ieee80211vap *vap)
 956 {
 957         int maxiter = 4;
 958         uint16_t r;
 959
 960         do {
 961                 get_random_bytes(&r, 2);
 962                 ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_checkid, &r);
 963                 maxiter--;
 964         } while (r == 0 && maxiter > 0);
 965         return r;
 966 }
 967
 968 /*
 969  * Verifies if we already received this packet by checking its
 970  * sequence number.
 971  * Returns 0 if the frame is to be accepted, 1 otherwise.
 972  */
 973 static int
 974 mesh_checkpseq(struct ieee80211vap *vap,
 975     const uint8_t source[IEEE80211_ADDR_LEN], uint32_t seq)
 976 {
 977         struct ieee80211_mesh_route *rt;
 978
 979         rt = ieee80211_mesh_rt_find(vap, source);
 980         if (rt == NULL) {
 981                 rt = ieee80211_mesh_rt_add(vap, source);
 982                 if (rt == NULL) {
 983                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source,
 984                             "%s", "add mcast route failed");
 985                         vap->iv_stats.is_mesh_rtaddfailed++;
 986                         return 1;
 987                 }
 988                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source,
 989                     "add mcast route, mesh seqno %d", seq);
 990                 rt->rt_lastmseq = seq;
 991                 return 0;
 992         }
 993         if (IEEE80211_MESH_SEQ_GEQ(rt->rt_lastmseq, seq)) {
 994                 return 1;
 995         } else {
 996                 rt->rt_lastmseq = seq;
 997                 return 0;
 998         }
 999 }
1000
1001 /*
1002  * Iterate the routing table and locate the next hop.
1003  */
1004 struct ieee80211_node *
1005 ieee80211_mesh_find_txnode(struct ieee80211vap *vap,
1006     const uint8_t dest[IEEE80211_ADDR_LEN])
1007 {
1008         struct ieee80211_mesh_route *rt;
1009
1010         rt = ieee80211_mesh_rt_find(vap, dest);
1011         if (rt == NULL)
1012                 return NULL;
1013         if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) {
1014                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
1015                     "%s: !valid, flags 0x%x", __func__, rt->rt_flags);
1016                 /* XXX stat */
1017                 return NULL;
1018         }
1019         if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) {
1020                 rt = ieee80211_mesh_rt_find(vap, rt->rt_mesh_gate);
1021                 if (rt == NULL) return NULL;
1022                 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) {
1023                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
1024                             "%s: meshgate !valid, flags 0x%x", __func__,
1025                             rt->rt_flags);
1026                         /* XXX stat */
1027                         return NULL;
1028                 }
1029         }
1030         return ieee80211_find_txnode(vap, rt->rt_nexthop);
1031 }
1032
1033 static void
1034 mesh_transmit_to_gate(struct ieee80211vap *vap, struct mbuf *m,
1035     struct ieee80211_mesh_route *rt_gate)
1036 {
1037         struct ifnet *ifp = vap->iv_ifp;
1038         struct ieee80211_node *ni;
1039
1040         IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
1041
1042         ni = ieee80211_mesh_find_txnode(vap, rt_gate->rt_dest);
1043         if (ni == NULL) {
1044                 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
1045                 m_freem(m);
1046                 return;
1047         }
1048
1049         /*
1050          * Send through the VAP packet transmit path.
1051          * This consumes the node ref grabbed above and
1052          * the mbuf, regardless of whether there's a problem
1053          * or not.
1054          */
1055         (void) ieee80211_vap_pkt_send_dest(vap, m, ni);
1056 }
1057
1058 /*
1059  * Forward the queued frames to known valid mesh gates.
1060  * Assume destination to be outside the MBSS (i.e. proxy entry),
1061  * If no valid mesh gates are known silently discard queued frames.
1062  * After transmitting frames to all known valid mesh gates, this route
1063  * will be marked invalid, and a new path discovery will happen in the hopes
1064  * that (at least) one of the mesh gates have a new proxy entry for us to use.
1065  */
1066 void
1067 ieee80211_mesh_forward_to_gates(struct ieee80211vap *vap,
1068     struct ieee80211_mesh_route *rt_dest)
1069 {
1070         struct ieee80211com *ic = vap->iv_ic;
1071         struct ieee80211_mesh_state *ms = vap->iv_mesh;
1072         struct ieee80211_mesh_route *rt_gate;
1073         struct ieee80211_mesh_gate_route *gr = NULL, *gr_next;
1074         struct mbuf *m, *mcopy, *next;
1075
1076         IEEE80211_TX_UNLOCK_ASSERT(ic);
1077
1078         KASSERT( rt_dest->rt_flags == IEEE80211_MESHRT_FLAGS_DISCOVER,
1079             ("Route is not marked with IEEE80211_MESHRT_FLAGS_DISCOVER"));
1080
1081         /* XXX: send to more than one valid mash gate */
1082         MESH_RT_LOCK(ms);
1083
1084         m = ieee80211_ageq_remove(&ic->ic_stageq,
1085             (struct ieee80211_node *)(uintptr_t)
1086             ieee80211_mac_hash(ic, rt_dest->rt_dest));
1087
1088         TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, gr_next) {
1089                 rt_gate = gr->gr_route;
1090                 if (rt_gate == NULL) {
1091                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP,
1092                                 rt_dest->rt_dest,
1093                                 "mesh gate with no path %6D",
1094                                 gr->gr_addr, ":");
1095                         continue;
1096                 }
1097                 if ((rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0)
1098                         continue;
1099                 KASSERT(rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_GATE,
1100                     ("route not marked as a mesh gate"));
1101                 KASSERT((rt_gate->rt_flags &
1102                         IEEE80211_MESHRT_FLAGS_PROXY) == 0,
1103                         ("found mesh gate that is also marked porxy"));
1104                 /*
1105                  * convert route to a proxy route gated by the current
1106                  * mesh gate, this is needed so encap can built data
1107                  * frame with correct address.
1108                  */
1109                 rt_dest->rt_flags = IEEE80211_MESHRT_FLAGS_PROXY |
1110                         IEEE80211_MESHRT_FLAGS_VALID;
1111                 rt_dest->rt_ext_seq = 1; /* random value */
1112                 IEEE80211_ADDR_COPY(rt_dest->rt_mesh_gate, rt_gate->rt_dest);
1113                 IEEE80211_ADDR_COPY(rt_dest->rt_nexthop, rt_gate->rt_nexthop);
1114                 rt_dest->rt_metric = rt_gate->rt_metric;
1115                 rt_dest->rt_nhops = rt_gate->rt_nhops;
1116                 ieee80211_mesh_rt_update(rt_dest, ms->ms_ppath->mpp_inact);
1117                 MESH_RT_UNLOCK(ms);
1118                 /* XXX: lock?? */
1119                 mcopy = m_dup(m, M_NOWAIT);
1120                 for (; mcopy != NULL; mcopy = next) {
1121                         next = mcopy->m_nextpkt;
1122                         mcopy->m_nextpkt = NULL;
1123                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP,
1124                             rt_dest->rt_dest,
1125                             "flush queued frame %p len %d", mcopy,
1126                             mcopy->m_pkthdr.len);
1127                         mesh_transmit_to_gate(vap, mcopy, rt_gate);
1128                 }
1129                 MESH_RT_LOCK(ms);
1130         }
1131         rt_dest->rt_flags = 0; /* Mark invalid */
1132         m_freem(m);
1133         MESH_RT_UNLOCK(ms);
1134 }
1135
1136 /*
1137  * Forward the specified frame.
1138  * Decrement the TTL and set TA to our MAC address.
1139  */
1140 static void
1141 mesh_forward(struct ieee80211vap *vap, struct mbuf *m,
1142     const struct ieee80211_meshcntl *mc)
1143 {
1144         struct ieee80211com *ic = vap->iv_ic;
1145         struct ieee80211_mesh_state *ms = vap->iv_mesh;
1146         struct ifnet *ifp = vap->iv_ifp;
1147         const struct ieee80211_frame *wh =
1148             mtod(m, const struct ieee80211_frame *);
1149         struct mbuf *mcopy;
1150         struct ieee80211_meshcntl *mccopy;
1151         struct ieee80211_frame *whcopy;
1152         struct ieee80211_node *ni;
1153         int err;
1154
1155         /* This is called from the RX path - don't hold this lock */
1156         IEEE80211_TX_UNLOCK_ASSERT(ic);
1157
1158         /*
1159          * mesh ttl of 1 means we are the last one receiving it,
1160          * according to amendment we decrement and then check if
1161          * 0, if so we dont forward.
1162          */
1163         if (mc->mc_ttl < 1) {
1164                 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1165                     "%s", "frame not fwd'd, ttl 1");
1166                 vap->iv_stats.is_mesh_fwd_ttl++;
1167                 return;
1168         }
1169         if (!(ms->ms_flags & IEEE80211_MESHFLAGS_FWD)) {
1170                 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1171                     "%s", "frame not fwd'd, fwding disabled");
1172                 vap->iv_stats.is_mesh_fwd_disabled++;
1173                 return;
1174         }
1175         mcopy = m_dup(m, M_NOWAIT);
1176         if (mcopy == NULL) {
1177                 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1178                     "%s", "frame not fwd'd, cannot dup");
1179                 vap->iv_stats.is_mesh_fwd_nobuf++;
1180                 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
1181                 return;
1182         }
1183         mcopy = m_pullup(mcopy, ieee80211_hdrspace(ic, wh) +
1184             sizeof(struct ieee80211_meshcntl));
1185         if (mcopy == NULL) {
1186                 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1187                     "%s", "frame not fwd'd, too short");
1188                 vap->iv_stats.is_mesh_fwd_tooshort++;
1189                 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
1190                 m_freem(mcopy);
1191                 return;
1192         }
1193         whcopy = mtod(mcopy, struct ieee80211_frame *);
1194         mccopy = (struct ieee80211_meshcntl *)
1195             (mtod(mcopy, uint8_t *) + ieee80211_hdrspace(ic, wh));
1196         /* XXX clear other bits? */
1197         whcopy->i_fc[1] &= ~IEEE80211_FC1_RETRY;
1198         IEEE80211_ADDR_COPY(whcopy->i_addr2, vap->iv_myaddr);
1199         if (IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1200                 ni = ieee80211_ref_node(vap->iv_bss);
1201                 mcopy->m_flags |= M_MCAST;
1202         } else {
1203                 ni = ieee80211_mesh_find_txnode(vap, whcopy->i_addr3);
1204                 if (ni == NULL) {
1205                         /*
1206                          * [Optional] any of the following three actions:
1207                          * o silently discard
1208                          * o trigger a path discovery
1209                          * o inform TA that meshDA is unknown.
1210                          */
1211                         IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1212                             "%s", "frame not fwd'd, no path");
1213                         ms->ms_ppath->mpp_senderror(vap, whcopy->i_addr3, NULL,
1214                             IEEE80211_REASON_MESH_PERR_NO_FI);
1215                         vap->iv_stats.is_mesh_fwd_nopath++;
1216                         m_freem(mcopy);
1217                         return;
1218                 }
1219                 IEEE80211_ADDR_COPY(whcopy->i_addr1, ni->ni_macaddr);
1220         }
1221         KASSERT(mccopy->mc_ttl > 0, ("%s called with wrong ttl", __func__));
1222         mccopy->mc_ttl--;
1223
1224         /* XXX calculate priority so drivers can find the tx queue */
1225         M_WME_SETAC(mcopy, WME_AC_BE);
1226
1227         /* XXX do we know m_nextpkt is NULL? */
1228         MPASS((mcopy->m_pkthdr.csum_flags & CSUM_SND_TAG) == 0);
1229         mcopy->m_pkthdr.rcvif = (void *) ni;
1230
1231         /*
1232          * XXX this bypasses all of the VAP TX handling; it passes frames
1233          * directly to the parent interface.
1234          *
1235          * Because of this, there's no TX lock being held as there's no
1236          * encaps state being used.
1237          *
1238          * Doing a direct parent transmit may not be the correct thing
1239          * to do here; we'll have to re-think this soon.
1240          */
1241         IEEE80211_TX_LOCK(ic);
1242         err = ieee80211_parent_xmitpkt(ic, mcopy);
1243         IEEE80211_TX_UNLOCK(ic);
1244         if (!err)
1245                 if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1);
1246 }
1247
1248 static struct mbuf *
1249 mesh_decap(struct ieee80211vap *vap, struct mbuf *m, int hdrlen, int meshdrlen)
1250 {
1251 #define WHDIR(wh)       ((wh)->i_fc[1] & IEEE80211_FC1_DIR_MASK)
1252 #define MC01(mc)        ((const struct ieee80211_meshcntl_ae01 *)mc)
1253         uint8_t b[sizeof(struct ieee80211_qosframe_addr4) +
1254                   sizeof(struct ieee80211_meshcntl_ae10)];
1255         const struct ieee80211_qosframe_addr4 *wh;
1256         const struct ieee80211_meshcntl_ae10 *mc;
1257         struct ether_header *eh;
1258         struct llc *llc;
1259         int ae;
1260
1261         if (m->m_len < hdrlen + sizeof(*llc) &&
1262             (m = m_pullup(m, hdrlen + sizeof(*llc))) == NULL) {
1263                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ANY,
1264                     "discard data frame: %s", "m_pullup failed");
1265                 vap->iv_stats.is_rx_tooshort++;
1266                 return NULL;
1267         }
1268         memcpy(b, mtod(m, caddr_t), hdrlen);
1269         wh = (const struct ieee80211_qosframe_addr4 *)&b[0];
1270         mc = (const struct ieee80211_meshcntl_ae10 *)&b[hdrlen - meshdrlen];
1271         KASSERT(WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS ||
1272                 WHDIR(wh) == IEEE80211_FC1_DIR_DSTODS,
1273             ("bogus dir, fc 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1]));
1274
1275         llc = (struct llc *)(mtod(m, caddr_t) + hdrlen);
1276         if (llc->llc_dsap == LLC_SNAP_LSAP && llc->llc_ssap == LLC_SNAP_LSAP &&
1277             llc->llc_control == LLC_UI && llc->llc_snap.org_code[0] == 0 &&
1278             llc->llc_snap.org_code[1] == 0 && llc->llc_snap.org_code[2] == 0 &&
1279             /* NB: preserve AppleTalk frames that have a native SNAP hdr */
1280             !(llc->llc_snap.ether_type == htons(ETHERTYPE_AARP) ||
1281               llc->llc_snap.ether_type == htons(ETHERTYPE_IPX))) {
1282                 m_adj(m, hdrlen + sizeof(struct llc) - sizeof(*eh));
1283                 llc = NULL;
1284         } else {
1285                 m_adj(m, hdrlen - sizeof(*eh));
1286         }
1287         eh = mtod(m, struct ether_header *);
1288         ae = mc->mc_flags & IEEE80211_MESH_AE_MASK;
1289         if (WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS) {
1290                 IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr1);
1291                 if (ae == IEEE80211_MESH_AE_00) {
1292                         IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr3);
1293                 } else if (ae == IEEE80211_MESH_AE_01) {
1294                         IEEE80211_ADDR_COPY(eh->ether_shost,
1295                             MC01(mc)->mc_addr4);
1296                 } else {
1297                         IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1298                             (const struct ieee80211_frame *)wh, NULL,
1299                             "bad AE %d", ae);
1300                         vap->iv_stats.is_mesh_badae++;
1301                         m_freem(m);
1302                         return NULL;
1303                 }
1304         } else {
1305                 if (ae == IEEE80211_MESH_AE_00) {
1306                         IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr3);
1307                         IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr4);
1308                 } else if (ae == IEEE80211_MESH_AE_10) {
1309                         IEEE80211_ADDR_COPY(eh->ether_dhost, mc->mc_addr5);
1310                         IEEE80211_ADDR_COPY(eh->ether_shost, mc->mc_addr6);
1311                 } else {
1312                         IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1313                             (const struct ieee80211_frame *)wh, NULL,
1314                             "bad AE %d", ae);
1315                         vap->iv_stats.is_mesh_badae++;
1316                         m_freem(m);
1317                         return NULL;
1318                 }
1319         }
1320 #ifndef __NO_STRICT_ALIGNMENT
1321         if (!ALIGNED_POINTER(mtod(m, caddr_t) + sizeof(*eh), uint32_t)) {
1322                 m = ieee80211_realign(vap, m, sizeof(*eh));
1323                 if (m == NULL)
1324                         return NULL;
1325         }
1326 #endif /* !__NO_STRICT_ALIGNMENT */
1327         if (llc != NULL) {
1328                 eh = mtod(m, struct ether_header *);
1329                 eh->ether_type = htons(m->m_pkthdr.len - sizeof(*eh));
1330         }
1331         return m;
1332 #undef  WDIR
1333 #undef  MC01
1334 }
1335
1336 /*
1337  * Return non-zero if the unicast mesh data frame should be processed
1338  * locally.  Frames that are not proxy'd have our address, otherwise
1339  * we need to consult the routing table to look for a proxy entry.
1340  */
1341 static __inline int
1342 mesh_isucastforme(struct ieee80211vap *vap, const struct ieee80211_frame *wh,
1343     const struct ieee80211_meshcntl *mc)
1344 {
1345         int ae = mc->mc_flags & 3;
1346
1347         KASSERT((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) == IEEE80211_FC1_DIR_DSTODS,
1348             ("bad dir 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1]));
1349         KASSERT(ae == IEEE80211_MESH_AE_00 || ae == IEEE80211_MESH_AE_10,
1350             ("bad AE %d", ae));
1351         if (ae == IEEE80211_MESH_AE_10) {       /* ucast w/ proxy */
1352                 const struct ieee80211_meshcntl_ae10 *mc10 =
1353                     (const struct ieee80211_meshcntl_ae10 *) mc;
1354                 struct ieee80211_mesh_route *rt =
1355                     ieee80211_mesh_rt_find(vap, mc10->mc_addr5);
1356                 /* check for proxy route to ourself */
1357                 return (rt != NULL &&
1358                     (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY));
1359         } else                                  /* ucast w/o proxy */
1360                 return IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_myaddr);
1361 }
1362
1363 /*
1364  * Verifies transmitter, updates lifetime, precursor list and forwards data.
1365  * > 0 means we have forwarded data and no need to process locally
1366  * == 0 means we want to process locally (and we may have forwarded data
1367  * < 0 means there was an error and data should be discarded
1368  */
1369 static int
1370 mesh_recv_indiv_data_to_fwrd(struct ieee80211vap *vap, struct mbuf *m,
1371     struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc)
1372 {
1373         struct ieee80211_qosframe_addr4 *qwh;
1374         struct ieee80211_mesh_state *ms = vap->iv_mesh;
1375         struct ieee80211_mesh_route *rt_meshda, *rt_meshsa;
1376
1377         /* This is called from the RX path - don't hold this lock */
1378         IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
1379
1380         qwh = (struct ieee80211_qosframe_addr4 *)wh;
1381
1382         /*
1383          * TODO:
1384          * o verify addr2 is  a legitimate transmitter
1385          * o lifetime of precursor of addr3 (addr2) is max(init, curr)
1386          * o lifetime of precursor of addr4 (nexthop) is max(init, curr)
1387          */
1388
1389         /* set lifetime of addr3 (meshDA) to initial value */
1390         rt_meshda = ieee80211_mesh_rt_find(vap, qwh->i_addr3);
1391         if (rt_meshda == NULL) {
1392                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, qwh->i_addr2,
1393                     "no route to meshDA(%6D)", qwh->i_addr3, ":");
1394                 /*
1395                  * [Optional] any of the following three actions:
1396                  * o silently discard                           [X]
1397                  * o trigger a path discovery                   [ ]
1398                  * o inform TA that meshDA is unknown.          [ ]
1399                  */
1400                 /* XXX: stats */
1401                 return (-1);
1402         }
1403
1404         ieee80211_mesh_rt_update(rt_meshda, ticks_to_msecs(
1405             ms->ms_ppath->mpp_inact));
1406
1407         /* set lifetime of addr4 (meshSA) to initial value */
1408         rt_meshsa = ieee80211_mesh_rt_find(vap, qwh->i_addr4);
1409         KASSERT(rt_meshsa != NULL, ("no route"));
1410         ieee80211_mesh_rt_update(rt_meshsa, ticks_to_msecs(
1411             ms->ms_ppath->mpp_inact));
1412
1413         mesh_forward(vap, m, mc);
1414         return (1); /* dont process locally */
1415 }
1416
1417 /*
1418  * Verifies transmitter, updates lifetime, precursor list and process data
1419  * locally, if data is proxy with AE = 10 it could mean data should go
1420  * on another mesh path or data should be forwarded to the DS.
1421  *
1422  * > 0 means we have forwarded data and no need to process locally
1423  * == 0 means we want to process locally (and we may have forwarded data
1424  * < 0 means there was an error and data should be discarded
1425  */
1426 static int
1427 mesh_recv_indiv_data_to_me(struct ieee80211vap *vap, struct mbuf *m,
1428     struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc)
1429 {
1430         struct ieee80211_qosframe_addr4 *qwh;
1431         const struct ieee80211_meshcntl_ae10 *mc10;
1432         struct ieee80211_mesh_state *ms = vap->iv_mesh;
1433         struct ieee80211_mesh_route *rt;
1434         int ae;
1435
1436         /* This is called from the RX path - don't hold this lock */
1437         IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
1438
1439         qwh = (struct ieee80211_qosframe_addr4 *)wh;
1440         mc10 = (const struct ieee80211_meshcntl_ae10 *)mc;
1441
1442         /*
1443          * TODO:
1444          * o verify addr2 is  a legitimate transmitter
1445          * o lifetime of precursor entry is max(init, curr)
1446          */
1447
1448         /* set lifetime of addr4 (meshSA) to initial value */
1449         rt = ieee80211_mesh_rt_find(vap, qwh->i_addr4);
1450         KASSERT(rt != NULL, ("no route"));
1451         ieee80211_mesh_rt_update(rt, ticks_to_msecs(ms->ms_ppath->mpp_inact));
1452         rt = NULL;
1453
1454         ae = mc10->mc_flags & IEEE80211_MESH_AE_MASK;
1455         KASSERT(ae == IEEE80211_MESH_AE_00 ||
1456             ae == IEEE80211_MESH_AE_10, ("bad AE %d", ae));
1457         if (ae == IEEE80211_MESH_AE_10) {
1458                 if (IEEE80211_ADDR_EQ(mc10->mc_addr5, qwh->i_addr3)) {
1459                         return (0); /* process locally */
1460                 }
1461
1462                 rt =  ieee80211_mesh_rt_find(vap, mc10->mc_addr5);
1463                 if (rt != NULL &&
1464                     (rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) &&
1465                     (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) == 0) {
1466                         /*
1467                          * Forward on another mesh-path, according to
1468                          * amendment as specified in 9.32.4.1
1469                          */
1470                         IEEE80211_ADDR_COPY(qwh->i_addr3, mc10->mc_addr5);
1471                         mesh_forward(vap, m,
1472                             (const struct ieee80211_meshcntl *)mc10);
1473                         return (1); /* dont process locally */
1474                 }
1475                 /*
1476                  * All other cases: forward of MSDUs from the MBSS to DS indiv.
1477                  * addressed according to 13.11.3.2.
1478                  */
1479                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, qwh->i_addr2,
1480                     "forward frame to DS, SA(%6D) DA(%6D)",
1481                     mc10->mc_addr6, ":", mc10->mc_addr5, ":");
1482         }
1483         return (0); /* process locally */
1484 }
1485
1486 /*
1487  * Try to forward the group addressed data on to other mesh STAs, and
1488  * also to the DS.
1489  *
1490  * > 0 means we have forwarded data and no need to process locally
1491  * == 0 means we want to process locally (and we may have forwarded data
1492  * < 0 means there was an error and data should be discarded
1493  */
1494 static int
1495 mesh_recv_group_data(struct ieee80211vap *vap, struct mbuf *m,
1496     struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc)
1497 {
1498 #define MC01(mc)        ((const struct ieee80211_meshcntl_ae01 *)mc)
1499         struct ieee80211_mesh_state *ms = vap->iv_mesh;
1500
1501         /* This is called from the RX path - don't hold this lock */
1502         IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
1503
1504         mesh_forward(vap, m, mc);
1505
1506         if(mc->mc_ttl > 0) {
1507                 if (mc->mc_flags & IEEE80211_MESH_AE_01) {
1508                         /*
1509                          * Forward of MSDUs from the MBSS to DS group addressed
1510                          * (according to 13.11.3.2)
1511                          * This happens by delivering the packet, and a bridge
1512                          * will sent it on another port member.
1513                          */
1514                         if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE &&
1515                             ms->ms_flags & IEEE80211_MESHFLAGS_FWD) {
1516                                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH,
1517                                     MC01(mc)->mc_addr4, "%s",
1518                                     "forward from MBSS to the DS");
1519                         }
1520                 }
1521         }
1522         return (0); /* process locally */
1523 #undef  MC01
1524 }
1525
1526 static int
1527 mesh_input(struct ieee80211_node *ni, struct mbuf *m,
1528     const struct ieee80211_rx_stats *rxs, int rssi, int nf)
1529 {
1530 #define HAS_SEQ(type)   ((type & 0x4) == 0)
1531 #define MC01(mc)        ((const struct ieee80211_meshcntl_ae01 *)mc)
1532         struct ieee80211vap *vap = ni->ni_vap;
1533         struct ieee80211com *ic = ni->ni_ic;
1534         struct ifnet *ifp = vap->iv_ifp;
1535         struct ieee80211_frame *wh;
1536         const struct ieee80211_meshcntl *mc;
1537         int hdrspace, meshdrlen, need_tap, error;
1538         uint8_t dir, type, subtype, ae;
1539         uint32_t seq;
1540         const uint8_t *addr;
1541         uint8_t qos[2];
1542
1543         KASSERT(ni != NULL, ("null node"));
1544         ni->ni_inact = ni->ni_inact_reload;
1545
1546         need_tap = 1;                   /* mbuf need to be tapped. */
1547         type = -1;                      /* undefined */
1548
1549         /* This is called from the RX path - don't hold this lock */
1550         IEEE80211_TX_UNLOCK_ASSERT(ic);
1551
1552         if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) {
1553                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1554                     ni->ni_macaddr, NULL,
1555                     "too short (1): len %u", m->m_pkthdr.len);
1556                 vap->iv_stats.is_rx_tooshort++;
1557                 goto out;
1558         }
1559         /*
1560          * Bit of a cheat here, we use a pointer for a 3-address
1561          * frame format but don't reference fields past outside
1562          * ieee80211_frame_min w/o first validating the data is
1563          * present.
1564         */
1565         wh = mtod(m, struct ieee80211_frame *);
1566
1567         if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) !=
1568             IEEE80211_FC0_VERSION_0) {
1569                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1570                     ni->ni_macaddr, NULL, "wrong version %x", wh->i_fc[0]);
1571                 vap->iv_stats.is_rx_badversion++;
1572                 goto err;
1573         }
1574         dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK;
1575         type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK;
1576         subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK;
1577         if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) {
1578                 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi);
1579                 ni->ni_noise = nf;
1580                 if (HAS_SEQ(type)) {
1581                         uint8_t tid = ieee80211_gettid(wh);
1582
1583                         if (IEEE80211_QOS_HAS_SEQ(wh) &&
1584                             TID_TO_WME_AC(tid) >= WME_AC_VI)
1585                                 ic->ic_wme.wme_hipri_traffic++;
1586                         if (! ieee80211_check_rxseq(ni, wh, wh->i_addr1, rxs))
1587                                 goto out;
1588                 }
1589         }
1590 #ifdef IEEE80211_DEBUG
1591         /*
1592          * It's easier, but too expensive, to simulate different mesh
1593          * topologies by consulting the ACL policy very early, so do this
1594          * only under DEBUG.
1595          *
1596          * NB: this check is also done upon peering link initiation.
1597          */
1598         if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) {
1599                 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL,
1600                     wh, NULL, "%s", "disallowed by ACL");
1601                 vap->iv_stats.is_rx_acl++;
1602                 goto out;
1603         }
1604 #endif
1605         switch (type) {
1606         case IEEE80211_FC0_TYPE_DATA:
1607                 if (ni == vap->iv_bss)
1608                         goto out;
1609                 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) {
1610                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
1611                             ni->ni_macaddr, NULL,
1612                             "peer link not yet established (%d)",
1613                             ni->ni_mlstate);
1614                         vap->iv_stats.is_mesh_nolink++;
1615                         goto out;
1616                 }
1617                 if (dir != IEEE80211_FC1_DIR_FROMDS &&
1618                     dir != IEEE80211_FC1_DIR_DSTODS) {
1619                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1620                             wh, "data", "incorrect dir 0x%x", dir);
1621                         vap->iv_stats.is_rx_wrongdir++;
1622                         goto err;
1623                 }
1624
1625                 /* All Mesh data frames are QoS subtype */
1626                 if (!HAS_SEQ(type)) {
1627                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1628                             wh, "data", "incorrect subtype 0x%x", subtype);
1629                         vap->iv_stats.is_rx_badsubtype++;
1630                         goto err;
1631                 }
1632
1633                 /*
1634                  * Next up, any fragmentation.
1635                  * XXX: we defrag before we even try to forward,
1636                  * Mesh Control field is not present in sub-sequent
1637                  * fragmented frames. This is in contrast to Draft 4.0.
1638                  */
1639                 hdrspace = ieee80211_hdrspace(ic, wh);
1640                 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1641                         m = ieee80211_defrag(ni, m, hdrspace);
1642                         if (m == NULL) {
1643                                 /* Fragment dropped or frame not complete yet */
1644                                 goto out;
1645                         }
1646                 }
1647                 wh = mtod(m, struct ieee80211_frame *); /* NB: after defrag */
1648
1649                 /*
1650                  * Now we have a complete Mesh Data frame.
1651                  */
1652
1653                 /*
1654                  * Only fromDStoDS data frames use 4 address qos frames
1655                  * as specified in amendment. Otherwise addr4 is located
1656                  * in the Mesh Control field and a 3 address qos frame
1657                  * is used.
1658                  */
1659                 *(uint16_t *)qos = *(uint16_t *)ieee80211_getqos(wh);
1660
1661                 /*
1662                  * NB: The mesh STA sets the Mesh Control Present
1663                  * subfield to 1 in the Mesh Data frame containing
1664                  * an unfragmented MSDU, an A-MSDU, or the first
1665                  * fragment of an MSDU.
1666                  * After defrag it should always be present.
1667                  */
1668                 if (!(qos[1] & IEEE80211_QOS_MC)) {
1669                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
1670                             ni->ni_macaddr, NULL,
1671                             "%s", "Mesh control field not present");
1672                         vap->iv_stats.is_rx_elem_missing++; /* XXX: kinda */
1673                         goto err;
1674                 }
1675
1676                 /* pull up enough to get to the mesh control */
1677                 if (m->m_len < hdrspace + sizeof(struct ieee80211_meshcntl) &&
1678                     (m = m_pullup(m, hdrspace +
1679                         sizeof(struct ieee80211_meshcntl))) == NULL) {
1680                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1681                             ni->ni_macaddr, NULL,
1682                             "data too short: expecting %u", hdrspace);
1683                         vap->iv_stats.is_rx_tooshort++;
1684                         goto out;               /* XXX */
1685                 }
1686                 /*
1687                  * Now calculate the full extent of the headers. Note
1688                  * mesh_decap will pull up anything we didn't get
1689                  * above when it strips the 802.11 headers.
1690                  */
1691                 mc = (const struct ieee80211_meshcntl *)
1692                     (mtod(m, const uint8_t *) + hdrspace);
1693                 ae = mc->mc_flags & IEEE80211_MESH_AE_MASK;
1694                 meshdrlen = sizeof(struct ieee80211_meshcntl) +
1695                     ae * IEEE80211_ADDR_LEN;
1696                 hdrspace += meshdrlen;
1697
1698                 /* pull complete hdrspace = ieee80211_hdrspace + meshcontrol */
1699                 if ((meshdrlen > sizeof(struct ieee80211_meshcntl)) &&
1700                     (m->m_len < hdrspace) &&
1701                     ((m = m_pullup(m, hdrspace)) == NULL)) {
1702                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1703                             ni->ni_macaddr, NULL,
1704                             "data too short: expecting %u", hdrspace);
1705                         vap->iv_stats.is_rx_tooshort++;
1706                         goto out;               /* XXX */
1707                 }
1708                 /* XXX: are we sure there is no reallocating after m_pullup? */
1709
1710                 seq = le32dec(mc->mc_seq);
1711                 if (IEEE80211_IS_MULTICAST(wh->i_addr1))
1712                         addr = wh->i_addr3;
1713                 else if (ae == IEEE80211_MESH_AE_01)
1714                         addr = MC01(mc)->mc_addr4;
1715                 else
1716                         addr = ((struct ieee80211_qosframe_addr4 *)wh)->i_addr4;
1717                 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, addr)) {
1718                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
1719                             addr, "data", "%s", "not to me");
1720                         vap->iv_stats.is_rx_wrongbss++; /* XXX kinda */
1721                         goto out;
1722                 }
1723                 if (mesh_checkpseq(vap, addr, seq) != 0) {
1724                         vap->iv_stats.is_rx_dup++;
1725                         goto out;
1726                 }
1727
1728                 /* This code "routes" the frame to the right control path */
1729                 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1730                         if (IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr3))
1731                                 error =
1732                                     mesh_recv_indiv_data_to_me(vap, m, wh, mc);
1733                         else if (IEEE80211_IS_MULTICAST(wh->i_addr3))
1734                                 error = mesh_recv_group_data(vap, m, wh, mc);
1735                         else
1736                                 error = mesh_recv_indiv_data_to_fwrd(vap, m,
1737                                     wh, mc);
1738                 } else
1739                         error = mesh_recv_group_data(vap, m, wh, mc);
1740                 if (error < 0)
1741                         goto err;
1742                 else if (error > 0)
1743                         goto out;
1744
1745                 if (ieee80211_radiotap_active_vap(vap))
1746                         ieee80211_radiotap_rx(vap, m);
1747                 need_tap = 0;
1748
1749                 /*
1750                  * Finally, strip the 802.11 header.
1751                  */
1752                 m = mesh_decap(vap, m, hdrspace, meshdrlen);
1753                 if (m == NULL) {
1754                         /* XXX mask bit to check for both */
1755                         /* don't count Null data frames as errors */
1756                         if (subtype == IEEE80211_FC0_SUBTYPE_NODATA ||
1757                             subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL)
1758                                 goto out;
1759                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
1760                             ni->ni_macaddr, "data", "%s", "decap error");
1761                         vap->iv_stats.is_rx_decap++;
1762                         IEEE80211_NODE_STAT(ni, rx_decap);
1763                         goto err;
1764                 }
1765                 if (qos[0] & IEEE80211_QOS_AMSDU) {
1766                         m = ieee80211_decap_amsdu(ni, m);
1767                         if (m == NULL)
1768                                 return IEEE80211_FC0_TYPE_DATA;
1769                 }
1770                 ieee80211_deliver_data(vap, ni, m);
1771                 return type;
1772         case IEEE80211_FC0_TYPE_MGT:
1773                 vap->iv_stats.is_rx_mgmt++;
1774                 IEEE80211_NODE_STAT(ni, rx_mgmt);
1775                 if (dir != IEEE80211_FC1_DIR_NODS) {
1776                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1777                             wh, "mgt", "incorrect dir 0x%x", dir);
1778                         vap->iv_stats.is_rx_wrongdir++;
1779                         goto err;
1780                 }
1781                 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) {
1782                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1783                             ni->ni_macaddr, "mgt", "too short: len %u",
1784                             m->m_pkthdr.len);
1785                         vap->iv_stats.is_rx_tooshort++;
1786                         goto out;
1787                 }
1788 #ifdef IEEE80211_DEBUG
1789                 if ((ieee80211_msg_debug(vap) &&
1790                     (vap->iv_ic->ic_flags & IEEE80211_F_SCAN)) ||
1791                     ieee80211_msg_dumppkts(vap)) {
1792                         if_printf(ifp, "received %s from %s rssi %d\n",
1793                             ieee80211_mgt_subtype_name(subtype),
1794                             ether_sprintf(wh->i_addr2), rssi);
1795                 }
1796 #endif
1797                 if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) {
1798                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1799                             wh, NULL, "%s", "WEP set but not permitted");
1800                         vap->iv_stats.is_rx_mgtdiscard++; /* XXX */
1801                         goto out;
1802                 }
1803                 vap->iv_recv_mgmt(ni, m, subtype, rxs, rssi, nf);
1804                 goto out;
1805         case IEEE80211_FC0_TYPE_CTL:
1806                 vap->iv_stats.is_rx_ctl++;
1807                 IEEE80211_NODE_STAT(ni, rx_ctrl);
1808                 goto out;
1809         default:
1810                 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1811                     wh, "bad", "frame type 0x%x", type);
1812                 /* should not come here */
1813                 break;
1814         }
1815 err:
1816         if_inc_counter(ifp, IFCOUNTER_IERRORS, 1);
1817 out:
1818         if (m != NULL) {
1819                 if (need_tap && ieee80211_radiotap_active_vap(vap))
1820                         ieee80211_radiotap_rx(vap, m);
1821                 m_freem(m);
1822         }
1823         return type;
1824 #undef  HAS_SEQ
1825 #undef  MC01
1826 }
1827
1828 static void
1829 mesh_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, int subtype,
1830     const struct ieee80211_rx_stats *rxs, int rssi, int nf)
1831 {
1832         struct ieee80211vap *vap = ni->ni_vap;
1833         struct ieee80211_mesh_state *ms = vap->iv_mesh;
1834         struct ieee80211com *ic = ni->ni_ic;
1835         struct ieee80211_channel *rxchan = ic->ic_curchan;
1836         struct ieee80211_frame *wh;
1837         struct ieee80211_mesh_route *rt;
1838         uint8_t *frm, *efrm;
1839
1840         wh = mtod(m0, struct ieee80211_frame *);
1841         frm = (uint8_t *)&wh[1];
1842         efrm = mtod(m0, uint8_t *) + m0->m_len;
1843         switch (subtype) {
1844         case IEEE80211_FC0_SUBTYPE_PROBE_RESP:
1845         case IEEE80211_FC0_SUBTYPE_BEACON:
1846         {
1847                 struct ieee80211_scanparams scan;
1848                 struct ieee80211_channel *c;
1849                 /*
1850                  * We process beacon/probe response
1851                  * frames to discover neighbors.
1852                  */
1853                 if (rxs != NULL) {
1854                         c = ieee80211_lookup_channel_rxstatus(vap, rxs);
1855                         if (c != NULL)
1856                                 rxchan = c;
1857                 }
1858                 if (ieee80211_parse_beacon(ni, m0, rxchan, &scan) != 0)
1859                         return;
1860                 /*
1861                  * Count frame now that we know it's to be processed.
1862                  */
1863                 if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) {
1864                         vap->iv_stats.is_rx_beacon++;   /* XXX remove */
1865                         IEEE80211_NODE_STAT(ni, rx_beacons);
1866                 } else
1867                         IEEE80211_NODE_STAT(ni, rx_proberesp);
1868                 /*
1869                  * If scanning, just pass information to the scan module.
1870                  */
1871                 if (ic->ic_flags & IEEE80211_F_SCAN) {
1872                         if (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN) {
1873                                 /*
1874                                  * Actively scanning a channel marked passive;
1875                                  * send a probe request now that we know there
1876                                  * is 802.11 traffic present.
1877                                  *
1878                                  * XXX check if the beacon we recv'd gives
1879                                  * us what we need and suppress the probe req
1880                                  */
1881                                 ieee80211_probe_curchan(vap, 1);
1882                                 ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN;
1883                         }
1884                         ieee80211_add_scan(vap, rxchan, &scan, wh,
1885                             subtype, rssi, nf);
1886                         return;
1887                 }
1888
1889                 /* The rest of this code assumes we are running */
1890                 if (vap->iv_state != IEEE80211_S_RUN)
1891                         return;
1892                 /*
1893                  * Ignore non-mesh STAs.
1894                  */
1895                 if ((scan.capinfo &
1896                      (IEEE80211_CAPINFO_ESS|IEEE80211_CAPINFO_IBSS)) ||
1897                     scan.meshid == NULL || scan.meshconf == NULL) {
1898                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1899                             wh, "beacon", "%s", "not a mesh sta");
1900                         vap->iv_stats.is_mesh_wrongmesh++;
1901                         return;
1902                 }
1903                 /*
1904                  * Ignore STAs for other mesh networks.
1905                  */
1906                 if (memcmp(scan.meshid+2, ms->ms_id, ms->ms_idlen) != 0 ||
1907                     mesh_verify_meshconf(vap, scan.meshconf)) {
1908                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1909                             wh, "beacon", "%s", "not for our mesh");
1910                         vap->iv_stats.is_mesh_wrongmesh++;
1911                         return;
1912                 }
1913                 /*
1914                  * Peer only based on the current ACL policy.
1915                  */
1916                 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) {
1917                         IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL,
1918                             wh, NULL, "%s", "disallowed by ACL");
1919                         vap->iv_stats.is_rx_acl++;
1920                         return;
1921                 }
1922                 /*
1923                  * Do neighbor discovery.
1924                  */
1925                 if (!IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_macaddr)) {
1926                         /*
1927                          * Create a new entry in the neighbor table.
1928                          */
1929                         ni = ieee80211_add_neighbor(vap, wh, &scan);
1930                 }
1931                 /*
1932                  * Automatically peer with discovered nodes if possible.
1933                  */
1934                 if (ni != vap->iv_bss &&
1935                     (ms->ms_flags & IEEE80211_MESHFLAGS_AP)) {
1936                         switch (ni->ni_mlstate) {
1937                         case IEEE80211_NODE_MESH_IDLE:
1938                         {
1939                                 uint16_t args[1];
1940
1941                                 /* Wait for backoff callout to reset counter */
1942                                 if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding)
1943                                         return;
1944
1945                                 ni->ni_mlpid = mesh_generateid(vap);
1946                                 if (ni->ni_mlpid == 0)
1947                                         return;
1948                                 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENSNT);
1949                                 args[0] = ni->ni_mlpid;
1950                                 ieee80211_send_action(ni,
1951                                 IEEE80211_ACTION_CAT_SELF_PROT,
1952                                 IEEE80211_ACTION_MESHPEERING_OPEN, args);
1953                                 ni->ni_mlrcnt = 0;
1954                                 mesh_peer_timeout_setup(ni);
1955                                 break;
1956                         }
1957                         case IEEE80211_NODE_MESH_ESTABLISHED:
1958                         {
1959                                 /*
1960                                  * Valid beacon from a peer mesh STA
1961                                  * bump TA lifetime
1962                                  */
1963                                 rt = ieee80211_mesh_rt_find(vap, wh->i_addr2);
1964                                 if(rt != NULL) {
1965                                         ieee80211_mesh_rt_update(rt,
1966                                             ticks_to_msecs(
1967                                             ms->ms_ppath->mpp_inact));
1968                                 }
1969                                 break;
1970                         }
1971                         default:
1972                                 break; /* ignore */
1973                         }
1974                 }
1975                 break;
1976         }
1977         case IEEE80211_FC0_SUBTYPE_PROBE_REQ:
1978         {
1979                 uint8_t *ssid, *meshid, *rates, *xrates;
1980
1981                 if (vap->iv_state != IEEE80211_S_RUN) {
1982                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1983                             wh, NULL, "wrong state %s",
1984                             ieee80211_state_name[vap->iv_state]);
1985                         vap->iv_stats.is_rx_mgtdiscard++;
1986                         return;
1987                 }
1988                 if (IEEE80211_IS_MULTICAST(wh->i_addr2)) {
1989                         /* frame must be directed */
1990                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1991                             wh, NULL, "%s", "not unicast");
1992                         vap->iv_stats.is_rx_mgtdiscard++;       /* XXX stat */
1993                         return;
1994                 }
1995                 /*
1996                  * prreq frame format
1997                  *      [tlv] ssid
1998                  *      [tlv] supported rates
1999                  *      [tlv] extended supported rates
2000                  *      [tlv] mesh id
2001                  */
2002                 ssid = meshid = rates = xrates = NULL;
2003                 while (efrm - frm > 1) {
2004                         IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return);
2005                         switch (*frm) {
2006                         case IEEE80211_ELEMID_SSID:
2007                                 ssid = frm;
2008                                 break;
2009                         case IEEE80211_ELEMID_RATES:
2010                                 rates = frm;
2011                                 break;
2012                         case IEEE80211_ELEMID_XRATES:
2013                                 xrates = frm;
2014                                 break;
2015                         case IEEE80211_ELEMID_MESHID:
2016                                 meshid = frm;
2017                                 break;
2018                         }
2019                         frm += frm[1] + 2;
2020                 }
2021                 IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return);
2022                 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return);
2023                 if (xrates != NULL)
2024                         IEEE80211_VERIFY_ELEMENT(xrates,
2025                             IEEE80211_RATE_MAXSIZE - rates[1], return);
2026                 if (meshid != NULL) {
2027                         IEEE80211_VERIFY_ELEMENT(meshid,
2028                             IEEE80211_MESHID_LEN, return);
2029                         /* NB: meshid, not ssid */
2030                         IEEE80211_VERIFY_SSID(vap->iv_bss, meshid, return);
2031                 }
2032
2033                 /* XXX find a better class or define it's own */
2034                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_INPUT, wh->i_addr2,
2035                     "%s", "recv probe req");
2036                 /*
2037                  * Some legacy 11b clients cannot hack a complete
2038                  * probe response frame.  When the request includes
2039                  * only a bare-bones rate set, communicate this to
2040                  * the transmit side.
2041                  */
2042                 ieee80211_send_proberesp(vap, wh->i_addr2, 0);
2043                 break;
2044         }
2045
2046         case IEEE80211_FC0_SUBTYPE_ACTION:
2047         case IEEE80211_FC0_SUBTYPE_ACTION_NOACK:
2048                 if (ni == vap->iv_bss) {
2049                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2050                             wh, NULL, "%s", "unknown node");
2051                         vap->iv_stats.is_rx_mgtdiscard++;
2052                 } else if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) &&
2053                     !IEEE80211_IS_MULTICAST(wh->i_addr1)) {
2054                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2055                             wh, NULL, "%s", "not for us");
2056                         vap->iv_stats.is_rx_mgtdiscard++;
2057                 } else if (vap->iv_state != IEEE80211_S_RUN) {
2058                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2059                             wh, NULL, "wrong state %s",
2060                             ieee80211_state_name[vap->iv_state]);
2061                         vap->iv_stats.is_rx_mgtdiscard++;
2062                 } else {
2063                         if (ieee80211_parse_action(ni, m0) == 0)
2064                                 (void)ic->ic_recv_action(ni, wh, frm, efrm);
2065                 }
2066                 break;
2067
2068         case IEEE80211_FC0_SUBTYPE_ASSOC_REQ:
2069         case IEEE80211_FC0_SUBTYPE_ASSOC_RESP:
2070         case IEEE80211_FC0_SUBTYPE_REASSOC_REQ:
2071         case IEEE80211_FC0_SUBTYPE_REASSOC_RESP:
2072         case IEEE80211_FC0_SUBTYPE_TIMING_ADV:
2073         case IEEE80211_FC0_SUBTYPE_ATIM:
2074         case IEEE80211_FC0_SUBTYPE_DISASSOC:
2075         case IEEE80211_FC0_SUBTYPE_AUTH:
2076         case IEEE80211_FC0_SUBTYPE_DEAUTH:
2077                 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2078                     wh, NULL, "%s", "not handled");
2079                 vap->iv_stats.is_rx_mgtdiscard++;
2080                 break;
2081
2082         default:
2083                 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
2084                     wh, "mgt", "subtype 0x%x not handled", subtype);
2085                 vap->iv_stats.is_rx_badsubtype++;
2086                 break;
2087         }
2088 }
2089
2090 static void
2091 mesh_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype)
2092 {
2093
2094         switch (subtype) {
2095         case IEEE80211_FC0_SUBTYPE_BAR:
2096                 ieee80211_recv_bar(ni, m);
2097                 break;
2098         }
2099 }
2100
2101 /*
2102  * Parse meshpeering action ie's for MPM frames
2103  */
2104 static const struct ieee80211_meshpeer_ie *
2105 mesh_parse_meshpeering_action(struct ieee80211_node *ni,
2106         const struct ieee80211_frame *wh,       /* XXX for VERIFY_LENGTH */
2107         const uint8_t *frm, const uint8_t *efrm,
2108         struct ieee80211_meshpeer_ie *mp, uint8_t subtype)
2109 {
2110         struct ieee80211vap *vap = ni->ni_vap;
2111         const struct ieee80211_meshpeer_ie *mpie;
2112         uint16_t args[3];
2113         const uint8_t *meshid, *meshconf;
2114         uint8_t sendclose = 0; /* 1 = MPM frame rejected, close will be sent */
2115
2116         meshid = meshconf = NULL;
2117         while (efrm - frm > 1) {
2118                 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return NULL);
2119                 switch (*frm) {
2120                 case IEEE80211_ELEMID_MESHID:
2121                         meshid = frm;
2122                         break;
2123                 case IEEE80211_ELEMID_MESHCONF:
2124                         meshconf = frm;
2125                         break;
2126                 case IEEE80211_ELEMID_MESHPEER:
2127                         mpie = (const struct ieee80211_meshpeer_ie *) frm;
2128                         memset(mp, 0, sizeof(*mp));
2129                         mp->peer_len = mpie->peer_len;
2130                         mp->peer_proto = le16dec(&mpie->peer_proto);
2131                         mp->peer_llinkid = le16dec(&mpie->peer_llinkid);
2132                         switch (subtype) {
2133                         case IEEE80211_ACTION_MESHPEERING_CONFIRM:
2134                                 mp->peer_linkid =
2135                                     le16dec(&mpie->peer_linkid);
2136                                 break;
2137                         case IEEE80211_ACTION_MESHPEERING_CLOSE:
2138                                 /* NB: peer link ID is optional */
2139                                 if (mpie->peer_len ==
2140                                     (IEEE80211_MPM_BASE_SZ + 2)) {
2141                                         mp->peer_linkid = 0;
2142                                         mp->peer_rcode =
2143                                             le16dec(&mpie->peer_linkid);
2144                                 } else {
2145                                         mp->peer_linkid =
2146                                             le16dec(&mpie->peer_linkid);
2147                                         mp->peer_rcode =
2148                                             le16dec(&mpie->peer_rcode);
2149                                 }
2150                                 break;
2151                         }
2152                         break;
2153                 }
2154                 frm += frm[1] + 2;
2155         }
2156
2157         /*
2158          * Verify the contents of the frame.
2159          * If it fails validation, close the peer link.
2160          */
2161         if (mesh_verify_meshpeer(vap, subtype, (const uint8_t *)mp)) {
2162                 sendclose = 1;
2163                 IEEE80211_DISCARD(vap,
2164                     IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2165                     wh, NULL, "%s", "MPM validation failed");
2166         }
2167
2168         /* If meshid is not the same reject any frames type. */
2169         if (sendclose == 0 && mesh_verify_meshid(vap, meshid)) {
2170                 sendclose = 1;
2171                 IEEE80211_DISCARD(vap,
2172                     IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2173                     wh, NULL, "%s", "not for our mesh");
2174                 if (subtype == IEEE80211_ACTION_MESHPEERING_CLOSE) {
2175                         /*
2176                          * Standard not clear about this, if we dont ignore
2177                          * there will be an endless loop between nodes sending
2178                          * CLOSE frames between each other with wrong meshid.
2179                          * Discard and timers will bring FSM to IDLE state.
2180                          */
2181                         return NULL;
2182                 }
2183         }
2184
2185         /*
2186          * Close frames are accepted if meshid is the same.
2187          * Verify the other two types.
2188          */
2189         if (sendclose == 0 && subtype != IEEE80211_ACTION_MESHPEERING_CLOSE &&
2190             mesh_verify_meshconf(vap, meshconf)) {
2191                 sendclose = 1;
2192                 IEEE80211_DISCARD(vap,
2193                     IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2194                     wh, NULL, "%s", "configuration missmatch");
2195         }
2196
2197         if (sendclose) {
2198                 vap->iv_stats.is_rx_mgtdiscard++;
2199                 switch (ni->ni_mlstate) {
2200                 case IEEE80211_NODE_MESH_IDLE:
2201                 case IEEE80211_NODE_MESH_ESTABLISHED:
2202                 case IEEE80211_NODE_MESH_HOLDING:
2203                         /* ignore */
2204                         break;
2205                 case IEEE80211_NODE_MESH_OPENSNT:
2206                 case IEEE80211_NODE_MESH_OPENRCV:
2207                 case IEEE80211_NODE_MESH_CONFIRMRCV:
2208                         args[0] = ni->ni_mlpid;
2209                         args[1] = ni->ni_mllid;
2210                         /* Reason codes for rejection */
2211                         switch (subtype) {
2212                         case IEEE80211_ACTION_MESHPEERING_OPEN:
2213                                 args[2] = IEEE80211_REASON_MESH_CPVIOLATION;
2214                                 break;
2215                         case IEEE80211_ACTION_MESHPEERING_CONFIRM:
2216                                 args[2] = IEEE80211_REASON_MESH_INCONS_PARAMS;
2217                                 break;
2218                         }
2219                         ieee80211_send_action(ni,
2220                             IEEE80211_ACTION_CAT_SELF_PROT,
2221                             IEEE80211_ACTION_MESHPEERING_CLOSE,
2222                             args);
2223                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2224                         mesh_peer_timeout_setup(ni);
2225                         break;
2226                 }
2227                 return NULL;
2228         }
2229
2230         return (const struct ieee80211_meshpeer_ie *) mp;
2231 }
2232
2233 static int
2234 mesh_recv_action_meshpeering_open(struct ieee80211_node *ni,
2235         const struct ieee80211_frame *wh,
2236         const uint8_t *frm, const uint8_t *efrm)
2237 {
2238         struct ieee80211vap *vap = ni->ni_vap;
2239         struct ieee80211_mesh_state *ms = vap->iv_mesh;
2240         struct ieee80211_meshpeer_ie ie;
2241         const struct ieee80211_meshpeer_ie *meshpeer;
2242         uint16_t args[3];
2243
2244         /* +2+2 for action + code + capabilites */
2245         meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2, efrm, &ie,
2246             IEEE80211_ACTION_MESHPEERING_OPEN);
2247         if (meshpeer == NULL) {
2248                 return 0;
2249         }
2250
2251         /* XXX move up */
2252         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2253             "recv PEER OPEN, lid 0x%x", meshpeer->peer_llinkid);
2254
2255         switch (ni->ni_mlstate) {
2256         case IEEE80211_NODE_MESH_IDLE:
2257                 /* Reject open request if reached our maximum neighbor count */
2258                 if (ms->ms_neighbors >= IEEE80211_MESH_MAX_NEIGHBORS) {
2259                         args[0] = meshpeer->peer_llinkid;
2260                         args[1] = 0;
2261                         args[2] = IEEE80211_REASON_MESH_MAX_PEERS;
2262                         ieee80211_send_action(ni,
2263                             IEEE80211_ACTION_CAT_SELF_PROT,
2264                             IEEE80211_ACTION_MESHPEERING_CLOSE,
2265                             args);
2266                         /* stay in IDLE state */
2267                         return (0);
2268                 }
2269                 /* Open frame accepted */
2270                 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV);
2271                 ni->ni_mllid = meshpeer->peer_llinkid;
2272                 ni->ni_mlpid = mesh_generateid(vap);
2273                 if (ni->ni_mlpid == 0)
2274                         return 0;               /* XXX */
2275                 args[0] = ni->ni_mlpid;
2276                 /* Announce we're open too... */
2277                 ieee80211_send_action(ni,
2278                     IEEE80211_ACTION_CAT_SELF_PROT,
2279                     IEEE80211_ACTION_MESHPEERING_OPEN, args);
2280                 /* ...and confirm the link. */
2281                 args[0] = ni->ni_mlpid;
2282                 args[1] = ni->ni_mllid;
2283                 ieee80211_send_action(ni,
2284                     IEEE80211_ACTION_CAT_SELF_PROT,
2285                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
2286                     args);
2287                 mesh_peer_timeout_setup(ni);
2288                 break;
2289         case IEEE80211_NODE_MESH_OPENRCV:
2290                 /* Wrong Link ID */
2291                 if (ni->ni_mllid != meshpeer->peer_llinkid) {
2292                         args[0] = ni->ni_mllid;
2293                         args[1] = ni->ni_mlpid;
2294                         args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2295                         ieee80211_send_action(ni,
2296                             IEEE80211_ACTION_CAT_SELF_PROT,
2297                             IEEE80211_ACTION_MESHPEERING_CLOSE,
2298                             args);
2299                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2300                         mesh_peer_timeout_setup(ni);
2301                         break;
2302                 }
2303                 /* Duplicate open, confirm again. */
2304                 args[0] = ni->ni_mlpid;
2305                 args[1] = ni->ni_mllid;
2306                 ieee80211_send_action(ni,
2307                     IEEE80211_ACTION_CAT_SELF_PROT,
2308                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
2309                     args);
2310                 break;
2311         case IEEE80211_NODE_MESH_OPENSNT:
2312                 ni->ni_mllid = meshpeer->peer_llinkid;
2313                 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV);
2314                 args[0] = ni->ni_mlpid;
2315                 args[1] = ni->ni_mllid;
2316                 ieee80211_send_action(ni,
2317                     IEEE80211_ACTION_CAT_SELF_PROT,
2318                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
2319                     args);
2320                 /* NB: don't setup/clear any timeout */
2321                 break;
2322         case IEEE80211_NODE_MESH_CONFIRMRCV:
2323                 if (ni->ni_mlpid != meshpeer->peer_linkid ||
2324                     ni->ni_mllid != meshpeer->peer_llinkid) {
2325                         args[0] = ni->ni_mlpid;
2326                         args[1] = ni->ni_mllid;
2327                         args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2328                         ieee80211_send_action(ni,
2329                             IEEE80211_ACTION_CAT_SELF_PROT,
2330                             IEEE80211_ACTION_MESHPEERING_CLOSE,
2331                             args);
2332                         mesh_linkchange(ni,
2333                             IEEE80211_NODE_MESH_HOLDING);
2334                         mesh_peer_timeout_setup(ni);
2335                         break;
2336                 }
2337                 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED);
2338                 ni->ni_mllid = meshpeer->peer_llinkid;
2339                 args[0] = ni->ni_mlpid;
2340                 args[1] = ni->ni_mllid;
2341                 ieee80211_send_action(ni,
2342                     IEEE80211_ACTION_CAT_SELF_PROT,
2343                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
2344                     args);
2345                 mesh_peer_timeout_stop(ni);
2346                 break;
2347         case IEEE80211_NODE_MESH_ESTABLISHED:
2348                 if (ni->ni_mllid != meshpeer->peer_llinkid) {
2349                         args[0] = ni->ni_mllid;
2350                         args[1] = ni->ni_mlpid;
2351                         args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2352                         ieee80211_send_action(ni,
2353                             IEEE80211_ACTION_CAT_SELF_PROT,
2354                             IEEE80211_ACTION_MESHPEERING_CLOSE,
2355                             args);
2356                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2357                         mesh_peer_timeout_setup(ni);
2358                         break;
2359                 }
2360                 args[0] = ni->ni_mlpid;
2361                 args[1] = ni->ni_mllid;
2362                 ieee80211_send_action(ni,
2363                     IEEE80211_ACTION_CAT_SELF_PROT,
2364                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
2365                     args);
2366                 break;
2367         case IEEE80211_NODE_MESH_HOLDING:
2368                 args[0] = ni->ni_mlpid;
2369                 args[1] = meshpeer->peer_llinkid;
2370                 /* Standard not clear about what the reaason code should be */
2371                 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2372                 ieee80211_send_action(ni,
2373                     IEEE80211_ACTION_CAT_SELF_PROT,
2374                     IEEE80211_ACTION_MESHPEERING_CLOSE,
2375                     args);
2376                 break;
2377         }
2378         return 0;
2379 }
2380
2381 static int
2382 mesh_recv_action_meshpeering_confirm(struct ieee80211_node *ni,
2383         const struct ieee80211_frame *wh,
2384         const uint8_t *frm, const uint8_t *efrm)
2385 {
2386         struct ieee80211vap *vap = ni->ni_vap;
2387         struct ieee80211_meshpeer_ie ie;
2388         const struct ieee80211_meshpeer_ie *meshpeer;
2389         uint16_t args[3];
2390
2391         /* +2+2+2+2 for action + code + capabilites + status code + AID */
2392         meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2+2+2, efrm, &ie,
2393             IEEE80211_ACTION_MESHPEERING_CONFIRM);
2394         if (meshpeer == NULL) {
2395                 return 0;
2396         }
2397
2398         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2399             "recv PEER CONFIRM, local id 0x%x, peer id 0x%x",
2400             meshpeer->peer_llinkid, meshpeer->peer_linkid);
2401
2402         switch (ni->ni_mlstate) {
2403         case IEEE80211_NODE_MESH_OPENRCV:
2404                 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED);
2405                 mesh_peer_timeout_stop(ni);
2406                 break;
2407         case IEEE80211_NODE_MESH_OPENSNT:
2408                 mesh_linkchange(ni, IEEE80211_NODE_MESH_CONFIRMRCV);
2409                 mesh_peer_timeout_setup(ni);
2410                 break;
2411         case IEEE80211_NODE_MESH_HOLDING:
2412                 args[0] = ni->ni_mlpid;
2413                 args[1] = meshpeer->peer_llinkid;
2414                 /* Standard not clear about what the reaason code should be */
2415                 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2416                 ieee80211_send_action(ni,
2417                     IEEE80211_ACTION_CAT_SELF_PROT,
2418                     IEEE80211_ACTION_MESHPEERING_CLOSE,
2419                     args);
2420                 break;
2421         case IEEE80211_NODE_MESH_CONFIRMRCV:
2422                 if (ni->ni_mllid != meshpeer->peer_llinkid) {
2423                         args[0] = ni->ni_mlpid;
2424                         args[1] = ni->ni_mllid;
2425                         args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2426                         ieee80211_send_action(ni,
2427                             IEEE80211_ACTION_CAT_SELF_PROT,
2428                             IEEE80211_ACTION_MESHPEERING_CLOSE,
2429                             args);
2430                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2431                         mesh_peer_timeout_setup(ni);
2432                 }
2433                 break;
2434         default:
2435                 IEEE80211_DISCARD(vap,
2436                     IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2437                     wh, NULL, "received confirm in invalid state %d",
2438                     ni->ni_mlstate);
2439                 vap->iv_stats.is_rx_mgtdiscard++;
2440                 break;
2441         }
2442         return 0;
2443 }
2444
2445 static int
2446 mesh_recv_action_meshpeering_close(struct ieee80211_node *ni,
2447         const struct ieee80211_frame *wh,
2448         const uint8_t *frm, const uint8_t *efrm)
2449 {
2450         struct ieee80211_meshpeer_ie ie;
2451         const struct ieee80211_meshpeer_ie *meshpeer;
2452         uint16_t args[3];
2453
2454         /* +2 for action + code */
2455         meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2, efrm, &ie,
2456             IEEE80211_ACTION_MESHPEERING_CLOSE);
2457         if (meshpeer == NULL) {
2458                 return 0;
2459         }
2460
2461         /*
2462          * XXX: check reason code, for example we could receive
2463          * IEEE80211_REASON_MESH_MAX_PEERS then we should not attempt
2464          * to peer again.
2465          */
2466
2467         IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2468             ni, "%s", "recv PEER CLOSE");
2469
2470         switch (ni->ni_mlstate) {
2471         case IEEE80211_NODE_MESH_IDLE:
2472                 /* ignore */
2473                 break;
2474         case IEEE80211_NODE_MESH_OPENRCV:
2475         case IEEE80211_NODE_MESH_OPENSNT:
2476         case IEEE80211_NODE_MESH_CONFIRMRCV:
2477         case IEEE80211_NODE_MESH_ESTABLISHED:
2478                 args[0] = ni->ni_mlpid;
2479                 args[1] = ni->ni_mllid;
2480                 args[2] = IEEE80211_REASON_MESH_CLOSE_RCVD;
2481                 ieee80211_send_action(ni,
2482                     IEEE80211_ACTION_CAT_SELF_PROT,
2483                     IEEE80211_ACTION_MESHPEERING_CLOSE,
2484                     args);
2485                 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2486                 mesh_peer_timeout_setup(ni);
2487                 break;
2488         case IEEE80211_NODE_MESH_HOLDING:
2489                 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE);
2490                 mesh_peer_timeout_stop(ni);
2491                 break;
2492         }
2493         return 0;
2494 }
2495
2496 /*
2497  * Link Metric handling.
2498  */
2499 static int
2500 mesh_recv_action_meshlmetric(struct ieee80211_node *ni,
2501         const struct ieee80211_frame *wh,
2502         const uint8_t *frm, const uint8_t *efrm)
2503 {
2504         const struct ieee80211_meshlmetric_ie *ie =
2505             (const struct ieee80211_meshlmetric_ie *)
2506             (frm+2); /* action + code */
2507         struct ieee80211_meshlmetric_ie lm_rep;
2508
2509         if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) {
2510                 lm_rep.lm_flags = 0;
2511                 lm_rep.lm_metric = mesh_airtime_calc(ni);
2512                 ieee80211_send_action(ni,
2513                     IEEE80211_ACTION_CAT_MESH,
2514                     IEEE80211_ACTION_MESH_LMETRIC,
2515                     &lm_rep);
2516         }
2517         /* XXX: else do nothing for now */
2518         return 0;
2519 }
2520
2521 /*
2522  * Parse meshgate action ie's for GANN frames.
2523  * Returns -1 if parsing fails, otherwise 0.
2524  */
2525 static int
2526 mesh_parse_meshgate_action(struct ieee80211_node *ni,
2527     const struct ieee80211_frame *wh,   /* XXX for VERIFY_LENGTH */
2528     struct ieee80211_meshgann_ie *ie, const uint8_t *frm, const uint8_t *efrm)
2529 {
2530         struct ieee80211vap *vap = ni->ni_vap;
2531         const struct ieee80211_meshgann_ie *gannie;
2532
2533         while (efrm - frm > 1) {
2534                 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return -1);
2535                 switch (*frm) {
2536                 case IEEE80211_ELEMID_MESHGANN:
2537                         gannie = (const struct ieee80211_meshgann_ie *) frm;
2538                         memset(ie, 0, sizeof(*ie));
2539                         ie->gann_ie = gannie->gann_ie;
2540                         ie->gann_len = gannie->gann_len;
2541                         ie->gann_flags = gannie->gann_flags;
2542                         ie->gann_hopcount = gannie->gann_hopcount;
2543                         ie->gann_ttl = gannie->gann_ttl;
2544                         IEEE80211_ADDR_COPY(ie->gann_addr, gannie->gann_addr);
2545                         ie->gann_seq = le32dec(&gannie->gann_seq);
2546                         ie->gann_interval = le16dec(&gannie->gann_interval);
2547                         break;
2548                 }
2549                 frm += frm[1] + 2;
2550         }
2551
2552         return 0;
2553 }
2554
2555 /*
2556  * Mesh Gate Announcement handling.
2557  */
2558 static int
2559 mesh_recv_action_meshgate(struct ieee80211_node *ni,
2560         const struct ieee80211_frame *wh,
2561         const uint8_t *frm, const uint8_t *efrm)
2562 {
2563         struct ieee80211vap *vap = ni->ni_vap;
2564         struct ieee80211_mesh_state *ms = vap->iv_mesh;
2565         struct ieee80211_mesh_gate_route *gr, *next;
2566         struct ieee80211_mesh_route *rt_gate;
2567         struct ieee80211_meshgann_ie pgann;
2568         struct ieee80211_meshgann_ie ie;
2569         int found = 0;
2570
2571         /* +2 for action + code */
2572         if (mesh_parse_meshgate_action(ni, wh, &ie, frm+2, efrm) != 0) {
2573                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
2574                     ni->ni_macaddr, NULL, "%s",
2575                     "GANN parsing failed");
2576                 vap->iv_stats.is_rx_mgtdiscard++;
2577                 return (0);
2578         }
2579
2580         if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ie.gann_addr))
2581                 return 0;
2582
2583         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ni->ni_macaddr,
2584             "received GANN, meshgate: %6D (seq %u)", ie.gann_addr, ":",
2585             ie.gann_seq);
2586
2587         if (ms == NULL)
2588                 return (0);
2589         MESH_RT_LOCK(ms);
2590         TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) {
2591                 if (!IEEE80211_ADDR_EQ(gr->gr_addr, ie.gann_addr))
2592                         continue;
2593                 if (ie.gann_seq <= gr->gr_lastseq) {
2594                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
2595                             ni->ni_macaddr, NULL,
2596                             "GANN old seqno %u <= %u",
2597                             ie.gann_seq, gr->gr_lastseq);
2598                         MESH_RT_UNLOCK(ms);
2599                         return (0);
2600                 }
2601                 /* corresponding mesh gate found & GANN accepted */
2602                 found = 1;
2603                 break;
2604
2605         }
2606         if (found == 0) {
2607                 /* this GANN is from a new mesh Gate add it to known table. */
2608                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie.gann_addr,
2609                     "stored new GANN information, seq %u.", ie.gann_seq);
2610                 gr = IEEE80211_MALLOC(ALIGN(sizeof(struct ieee80211_mesh_gate_route)),
2611                     M_80211_MESH_GT_RT,
2612                     IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
2613                 IEEE80211_ADDR_COPY(gr->gr_addr, ie.gann_addr);
2614                 TAILQ_INSERT_TAIL(&ms->ms_known_gates, gr, gr_next);
2615         }
2616         gr->gr_lastseq = ie.gann_seq;
2617
2618         /* check if we have a path to this gate */
2619         rt_gate = mesh_rt_find_locked(ms, gr->gr_addr);
2620         if (rt_gate != NULL &&
2621             rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) {
2622                 gr->gr_route = rt_gate;
2623                 rt_gate->rt_flags |= IEEE80211_MESHRT_FLAGS_GATE;
2624         }
2625
2626         MESH_RT_UNLOCK(ms);
2627
2628         /* popagate only if decremented ttl >= 1 && forwarding is enabled */
2629         if ((ie.gann_ttl - 1) < 1 && !(ms->ms_flags & IEEE80211_MESHFLAGS_FWD))
2630                 return 0;
2631         pgann.gann_flags = ie.gann_flags; /* Reserved */
2632         pgann.gann_hopcount = ie.gann_hopcount + 1;
2633         pgann.gann_ttl = ie.gann_ttl - 1;
2634         IEEE80211_ADDR_COPY(pgann.gann_addr, ie.gann_addr);
2635         pgann.gann_seq = ie.gann_seq;
2636         pgann.gann_interval = ie.gann_interval;
2637
2638         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie.gann_addr,
2639             "%s", "propagate GANN");
2640
2641         ieee80211_send_action(vap->iv_bss, IEEE80211_ACTION_CAT_MESH,
2642             IEEE80211_ACTION_MESH_GANN, &pgann);
2643
2644         return 0;
2645 }
2646
2647 static int
2648 mesh_send_action(struct ieee80211_node *ni,
2649     const uint8_t sa[IEEE80211_ADDR_LEN],
2650     const uint8_t da[IEEE80211_ADDR_LEN],
2651     struct mbuf *m)
2652 {
2653         struct ieee80211vap *vap = ni->ni_vap;
2654         struct ieee80211com *ic = ni->ni_ic;
2655         struct ieee80211_bpf_params params;
2656         int ret;
2657
2658         KASSERT(ni != NULL, ("null node"));
2659
2660         if (vap->iv_state == IEEE80211_S_CAC) {
2661                 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT, ni,
2662                     "block %s frame in CAC state", "Mesh action");
2663                 vap->iv_stats.is_tx_badstate++;
2664                 ieee80211_free_node(ni);
2665                 m_freem(m);
2666                 return EIO;             /* XXX */
2667         }
2668
2669         M_PREPEND(m, sizeof(struct ieee80211_frame), M_NOWAIT);
2670         if (m == NULL) {
2671                 ieee80211_free_node(ni);
2672                 return ENOMEM;
2673         }
2674
2675         IEEE80211_TX_LOCK(ic);
2676         ieee80211_send_setup(ni, m,
2677              IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_ACTION,
2678              IEEE80211_NONQOS_TID, sa, da, sa);
2679         m->m_flags |= M_ENCAP;          /* mark encapsulated */
2680
2681         memset(&params, 0, sizeof(params));
2682         params.ibp_pri = WME_AC_VO;
2683         params.ibp_rate0 = ni->ni_txparms->mgmtrate;
2684         if (IEEE80211_IS_MULTICAST(da))
2685                 params.ibp_try0 = 1;
2686         else
2687                 params.ibp_try0 = ni->ni_txparms->maxretry;
2688         params.ibp_power = ni->ni_txpower;
2689
2690         IEEE80211_NODE_STAT(ni, tx_mgmt);
2691
2692         ret = ieee80211_raw_output(vap, ni, m, &params);
2693         IEEE80211_TX_UNLOCK(ic);
2694         return (ret);
2695 }
2696
2697 #define ADDSHORT(frm, v) do {                   \
2698         frm[0] = (v) & 0xff;                    \
2699         frm[1] = (v) >> 8;                      \
2700         frm += 2;                               \
2701 } while (0)
2702 #define ADDWORD(frm, v) do {                    \
2703         frm[0] = (v) & 0xff;                    \
2704         frm[1] = ((v) >> 8) & 0xff;             \
2705         frm[2] = ((v) >> 16) & 0xff;            \
2706         frm[3] = ((v) >> 24) & 0xff;            \
2707         frm += 4;                               \
2708 } while (0)
2709
2710 static int
2711 mesh_send_action_meshpeering_open(struct ieee80211_node *ni,
2712         int category, int action, void *args0)
2713 {
2714         struct ieee80211vap *vap = ni->ni_vap;
2715         struct ieee80211com *ic = ni->ni_ic;
2716         uint16_t *args = args0;
2717         const struct ieee80211_rateset *rs;
2718         struct mbuf *m;
2719         uint8_t *frm;
2720
2721         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2722             "send PEER OPEN action: localid 0x%x", args[0]);
2723
2724         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2725             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2726             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2727         ieee80211_ref_node(ni);
2728
2729         m = ieee80211_getmgtframe(&frm,
2730             ic->ic_headroom + sizeof(struct ieee80211_frame),
2731             sizeof(uint16_t)    /* action+category */
2732             + sizeof(uint16_t)  /* capabilites */
2733             + 2 + IEEE80211_RATE_SIZE
2734             + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
2735             + 2 + IEEE80211_MESHID_LEN
2736             + sizeof(struct ieee80211_meshconf_ie)
2737             + sizeof(struct ieee80211_meshpeer_ie)
2738         );
2739         if (m != NULL) {
2740                 /*
2741                  * mesh peer open action frame format:
2742                  *   [1] category
2743                  *   [1] action
2744                  *   [2] capabilities
2745                  *   [tlv] rates
2746                  *   [tlv] xrates
2747                  *   [tlv] mesh id
2748                  *   [tlv] mesh conf
2749                  *   [tlv] mesh peer link mgmt
2750                  */
2751                 *frm++ = category;
2752                 *frm++ = action;
2753                 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan));
2754                 rs = ieee80211_get_suprates(ic, ic->ic_curchan);
2755                 frm = ieee80211_add_rates(frm, rs);
2756                 frm = ieee80211_add_xrates(frm, rs);
2757                 frm = ieee80211_add_meshid(frm, vap);
2758                 frm = ieee80211_add_meshconf(frm, vap);
2759                 frm = ieee80211_add_meshpeer(frm, IEEE80211_ACTION_MESHPEERING_OPEN,
2760                     args[0], 0, 0);
2761                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2762                 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m);
2763         } else {
2764                 vap->iv_stats.is_tx_nobuf++;
2765                 ieee80211_free_node(ni);
2766                 return ENOMEM;
2767         }
2768 }
2769
2770 static int
2771 mesh_send_action_meshpeering_confirm(struct ieee80211_node *ni,
2772         int category, int action, void *args0)
2773 {
2774         struct ieee80211vap *vap = ni->ni_vap;
2775         struct ieee80211com *ic = ni->ni_ic;
2776         uint16_t *args = args0;
2777         const struct ieee80211_rateset *rs;
2778         struct mbuf *m;
2779         uint8_t *frm;
2780
2781         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2782             "send PEER CONFIRM action: localid 0x%x, peerid 0x%x",
2783             args[0], args[1]);
2784
2785         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2786             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2787             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2788         ieee80211_ref_node(ni);
2789
2790         m = ieee80211_getmgtframe(&frm,
2791             ic->ic_headroom + sizeof(struct ieee80211_frame),
2792             sizeof(uint16_t)    /* action+category */
2793             + sizeof(uint16_t)  /* capabilites */
2794             + sizeof(uint16_t)  /* status code */
2795             + sizeof(uint16_t)  /* AID */
2796             + 2 + IEEE80211_RATE_SIZE
2797             + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
2798             + 2 + IEEE80211_MESHID_LEN
2799             + sizeof(struct ieee80211_meshconf_ie)
2800             + sizeof(struct ieee80211_meshpeer_ie)
2801         );
2802         if (m != NULL) {
2803                 /*
2804                  * mesh peer confirm action frame format:
2805                  *   [1] category
2806                  *   [1] action
2807                  *   [2] capabilities
2808                  *   [2] status code
2809                  *   [2] association id (peer ID)
2810                  *   [tlv] rates
2811                  *   [tlv] xrates
2812                  *   [tlv] mesh id
2813                  *   [tlv] mesh conf
2814                  *   [tlv] mesh peer link mgmt
2815                  */
2816                 *frm++ = category;
2817                 *frm++ = action;
2818                 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan));
2819                 ADDSHORT(frm, 0);               /* status code */
2820                 ADDSHORT(frm, args[1]);         /* AID */
2821                 rs = ieee80211_get_suprates(ic, ic->ic_curchan);
2822                 frm = ieee80211_add_rates(frm, rs);
2823                 frm = ieee80211_add_xrates(frm, rs);
2824                 frm = ieee80211_add_meshid(frm, vap);
2825                 frm = ieee80211_add_meshconf(frm, vap);
2826                 frm = ieee80211_add_meshpeer(frm,
2827                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
2828                     args[0], args[1], 0);
2829                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2830                 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m);
2831         } else {
2832                 vap->iv_stats.is_tx_nobuf++;
2833                 ieee80211_free_node(ni);
2834                 return ENOMEM;
2835         }
2836 }
2837
2838 static int
2839 mesh_send_action_meshpeering_close(struct ieee80211_node *ni,
2840         int category, int action, void *args0)
2841 {
2842         struct ieee80211vap *vap = ni->ni_vap;
2843         struct ieee80211com *ic = ni->ni_ic;
2844         uint16_t *args = args0;
2845         struct mbuf *m;
2846         uint8_t *frm;
2847
2848         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2849             "send PEER CLOSE action: localid 0x%x, peerid 0x%x reason %d (%s)",
2850             args[0], args[1], args[2], ieee80211_reason_to_string(args[2]));
2851
2852         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2853             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2854             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2855         ieee80211_ref_node(ni);
2856
2857         m = ieee80211_getmgtframe(&frm,
2858             ic->ic_headroom + sizeof(struct ieee80211_frame),
2859             sizeof(uint16_t)    /* action+category */
2860             + sizeof(uint16_t)  /* reason code */
2861             + 2 + IEEE80211_MESHID_LEN
2862             + sizeof(struct ieee80211_meshpeer_ie)
2863         );
2864         if (m != NULL) {
2865                 /*
2866                  * mesh peer close action frame format:
2867                  *   [1] category
2868                  *   [1] action
2869                  *   [tlv] mesh id
2870                  *   [tlv] mesh peer link mgmt
2871                  */
2872                 *frm++ = category;
2873                 *frm++ = action;
2874                 frm = ieee80211_add_meshid(frm, vap);
2875                 frm = ieee80211_add_meshpeer(frm,
2876                     IEEE80211_ACTION_MESHPEERING_CLOSE,
2877                     args[0], args[1], args[2]);
2878                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2879                 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m);
2880         } else {
2881                 vap->iv_stats.is_tx_nobuf++;
2882                 ieee80211_free_node(ni);
2883                 return ENOMEM;
2884         }
2885 }
2886
2887 static int
2888 mesh_send_action_meshlmetric(struct ieee80211_node *ni,
2889         int category, int action, void *arg0)
2890 {
2891         struct ieee80211vap *vap = ni->ni_vap;
2892         struct ieee80211com *ic = ni->ni_ic;
2893         struct ieee80211_meshlmetric_ie *ie = arg0;
2894         struct mbuf *m;
2895         uint8_t *frm;
2896
2897         if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) {
2898                 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2899                     ni, "%s", "send LINK METRIC REQUEST action");
2900         } else {
2901                 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2902                     ni, "send LINK METRIC REPLY action: metric 0x%x",
2903                     ie->lm_metric);
2904         }
2905         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2906             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2907             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2908         ieee80211_ref_node(ni);
2909
2910         m = ieee80211_getmgtframe(&frm,
2911             ic->ic_headroom + sizeof(struct ieee80211_frame),
2912             sizeof(uint16_t) +  /* action+category */
2913             sizeof(struct ieee80211_meshlmetric_ie)
2914         );
2915         if (m != NULL) {
2916                 /*
2917                  * mesh link metric
2918                  *   [1] category
2919                  *   [1] action
2920                  *   [tlv] mesh link metric
2921                  */
2922                 *frm++ = category;
2923                 *frm++ = action;
2924                 frm = ieee80211_add_meshlmetric(frm,
2925                     ie->lm_flags, ie->lm_metric);
2926                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2927                 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m);
2928         } else {
2929                 vap->iv_stats.is_tx_nobuf++;
2930                 ieee80211_free_node(ni);
2931                 return ENOMEM;
2932         }
2933 }
2934
2935 static int
2936 mesh_send_action_meshgate(struct ieee80211_node *ni,
2937         int category, int action, void *arg0)
2938 {
2939         struct ieee80211vap *vap = ni->ni_vap;
2940         struct ieee80211com *ic = ni->ni_ic;
2941         struct ieee80211_meshgann_ie *ie = arg0;
2942         struct mbuf *m;
2943         uint8_t *frm;
2944
2945         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2946             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2947             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2948         ieee80211_ref_node(ni);
2949
2950         m = ieee80211_getmgtframe(&frm,
2951             ic->ic_headroom + sizeof(struct ieee80211_frame),
2952             sizeof(uint16_t) +  /* action+category */
2953             IEEE80211_MESHGANN_BASE_SZ
2954         );
2955         if (m != NULL) {
2956                 /*
2957                  * mesh link metric
2958                  *   [1] category
2959                  *   [1] action
2960                  *   [tlv] mesh gate annoucement
2961                  */
2962                 *frm++ = category;
2963                 *frm++ = action;
2964                 frm = ieee80211_add_meshgate(frm, ie);
2965                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2966                 return mesh_send_action(ni, vap->iv_myaddr, broadcastaddr, m);
2967         } else {
2968                 vap->iv_stats.is_tx_nobuf++;
2969                 ieee80211_free_node(ni);
2970                 return ENOMEM;
2971         }
2972 }
2973
2974 static void
2975 mesh_peer_timeout_setup(struct ieee80211_node *ni)
2976 {
2977         switch (ni->ni_mlstate) {
2978         case IEEE80211_NODE_MESH_HOLDING:
2979                 ni->ni_mltval = ieee80211_mesh_holdingtimeout;
2980                 break;
2981         case IEEE80211_NODE_MESH_CONFIRMRCV:
2982                 ni->ni_mltval = ieee80211_mesh_confirmtimeout;
2983                 break;
2984         case IEEE80211_NODE_MESH_IDLE:
2985                 ni->ni_mltval = 0;
2986                 break;
2987         default:
2988                 ni->ni_mltval = ieee80211_mesh_retrytimeout;
2989                 break;
2990         }
2991         if (ni->ni_mltval)
2992                 callout_reset(&ni->ni_mltimer, ni->ni_mltval,
2993                     mesh_peer_timeout_cb, ni);
2994 }
2995
2996 /*
2997  * Same as above but backoffs timer statisically 50%.
2998  */
2999 static void
3000 mesh_peer_timeout_backoff(struct ieee80211_node *ni)
3001 {
3002         uint32_t r;
3003
3004         r = arc4random();
3005         ni->ni_mltval += r % ni->ni_mltval;
3006         callout_reset(&ni->ni_mltimer, ni->ni_mltval, mesh_peer_timeout_cb,
3007             ni);
3008 }
3009
3010 static __inline void
3011 mesh_peer_timeout_stop(struct ieee80211_node *ni)
3012 {
3013         callout_drain(&ni->ni_mltimer);
3014 }
3015
3016 static void
3017 mesh_peer_backoff_cb(void *arg)
3018 {
3019         struct ieee80211_node *ni = (struct ieee80211_node *)arg;
3020
3021         /* After backoff timeout, try to peer automatically again. */
3022         ni->ni_mlhcnt = 0;
3023 }
3024
3025 /*
3026  * Mesh Peer Link Management FSM timeout handling.
3027  */
3028 static void
3029 mesh_peer_timeout_cb(void *arg)
3030 {
3031         struct ieee80211_node *ni = (struct ieee80211_node *)arg;
3032         uint16_t args[3];
3033
3034         IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_MESH,
3035             ni, "mesh link timeout, state %d, retry counter %d",
3036             ni->ni_mlstate, ni->ni_mlrcnt);
3037
3038         switch (ni->ni_mlstate) {
3039         case IEEE80211_NODE_MESH_IDLE:
3040         case IEEE80211_NODE_MESH_ESTABLISHED:
3041                 break;
3042         case IEEE80211_NODE_MESH_OPENSNT:
3043         case IEEE80211_NODE_MESH_OPENRCV:
3044                 if (ni->ni_mlrcnt == ieee80211_mesh_maxretries) {
3045                         args[0] = ni->ni_mlpid;
3046                         args[2] = IEEE80211_REASON_MESH_MAX_RETRIES;
3047                         ieee80211_send_action(ni,
3048                             IEEE80211_ACTION_CAT_SELF_PROT,
3049                             IEEE80211_ACTION_MESHPEERING_CLOSE, args);
3050                         ni->ni_mlrcnt = 0;
3051                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
3052                         mesh_peer_timeout_setup(ni);
3053                 } else {
3054                         args[0] = ni->ni_mlpid;
3055                         ieee80211_send_action(ni,
3056                             IEEE80211_ACTION_CAT_SELF_PROT,
3057                             IEEE80211_ACTION_MESHPEERING_OPEN, args);
3058                         ni->ni_mlrcnt++;
3059                         mesh_peer_timeout_backoff(ni);
3060                 }
3061                 break;
3062         case IEEE80211_NODE_MESH_CONFIRMRCV:
3063                 args[0] = ni->ni_mlpid;
3064                 args[2] = IEEE80211_REASON_MESH_CONFIRM_TIMEOUT;
3065                 ieee80211_send_action(ni,
3066                     IEEE80211_ACTION_CAT_SELF_PROT,
3067                     IEEE80211_ACTION_MESHPEERING_CLOSE, args);
3068                 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
3069                 mesh_peer_timeout_setup(ni);
3070                 break;
3071         case IEEE80211_NODE_MESH_HOLDING:
3072                 ni->ni_mlhcnt++;
3073                 if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding)
3074                         callout_reset(&ni->ni_mlhtimer,
3075                             ieee80211_mesh_backofftimeout,
3076                             mesh_peer_backoff_cb, ni);
3077                 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE);
3078                 break;
3079         }
3080 }
3081
3082 static int
3083 mesh_verify_meshid(struct ieee80211vap *vap, const uint8_t *ie)
3084 {
3085         struct ieee80211_mesh_state *ms = vap->iv_mesh;
3086
3087         if (ie == NULL || ie[1] != ms->ms_idlen)
3088                 return 1;
3089         return memcmp(ms->ms_id, ie + 2, ms->ms_idlen);
3090 }
3091
3092 /*
3093  * Check if we are using the same algorithms for this mesh.
3094  */
3095 static int
3096 mesh_verify_meshconf(struct ieee80211vap *vap, const uint8_t *ie)
3097 {
3098         const struct ieee80211_meshconf_ie *meshconf =
3099             (const struct ieee80211_meshconf_ie *) ie;
3100         const struct ieee80211_mesh_state *ms = vap->iv_mesh;
3101
3102         if (meshconf == NULL)
3103                 return 1;
3104         if (meshconf->conf_pselid != ms->ms_ppath->mpp_ie) {
3105                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3106                     "unknown path selection algorithm: 0x%x\n",
3107                     meshconf->conf_pselid);
3108                 return 1;
3109         }
3110         if (meshconf->conf_pmetid != ms->ms_pmetric->mpm_ie) {
3111                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3112                     "unknown path metric algorithm: 0x%x\n",
3113                     meshconf->conf_pmetid);
3114                 return 1;
3115         }
3116         if (meshconf->conf_ccid != 0) {
3117                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3118                     "unknown congestion control algorithm: 0x%x\n",
3119                     meshconf->conf_ccid);
3120                 return 1;
3121         }
3122         if (meshconf->conf_syncid != IEEE80211_MESHCONF_SYNC_NEIGHOFF) {
3123                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3124                     "unknown sync algorithm: 0x%x\n",
3125                     meshconf->conf_syncid);
3126                 return 1;
3127         }
3128         if (meshconf->conf_authid != 0) {
3129                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3130                     "unknown auth auth algorithm: 0x%x\n",
3131                     meshconf->conf_pselid);
3132                 return 1;
3133         }
3134         /* Not accepting peers */
3135         if (!(meshconf->conf_cap & IEEE80211_MESHCONF_CAP_AP)) {
3136                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3137                     "not accepting peers: 0x%x\n", meshconf->conf_cap);
3138                 return 1;
3139         }
3140         return 0;
3141 }
3142
3143 static int
3144 mesh_verify_meshpeer(struct ieee80211vap *vap, uint8_t subtype,
3145     const uint8_t *ie)
3146 {
3147         const struct ieee80211_meshpeer_ie *meshpeer =
3148             (const struct ieee80211_meshpeer_ie *) ie;
3149
3150         if (meshpeer == NULL ||
3151             meshpeer->peer_len < IEEE80211_MPM_BASE_SZ ||
3152             meshpeer->peer_len > IEEE80211_MPM_MAX_SZ)
3153                 return 1;
3154         if (meshpeer->peer_proto != IEEE80211_MPPID_MPM) {
3155                 IEEE80211_DPRINTF(vap,
3156                     IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
3157                     "Only MPM protocol is supported (proto: 0x%02X)",
3158                     meshpeer->peer_proto);
3159                 return 1;
3160         }
3161         switch (subtype) {
3162         case IEEE80211_ACTION_MESHPEERING_OPEN:
3163                 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ)
3164                         return 1;
3165                 break;
3166         case IEEE80211_ACTION_MESHPEERING_CONFIRM:
3167                 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ + 2)
3168                         return 1;
3169                 break;
3170         case IEEE80211_ACTION_MESHPEERING_CLOSE:
3171                 if (meshpeer->peer_len < IEEE80211_MPM_BASE_SZ + 2)
3172                         return 1;
3173                 if (meshpeer->peer_len == (IEEE80211_MPM_BASE_SZ + 2) &&
3174                     meshpeer->peer_linkid != 0)
3175                         return 1;
3176                 if (meshpeer->peer_rcode == 0)
3177                         return 1;
3178                 break;
3179         }
3180         return 0;
3181 }
3182
3183 /*
3184  * Add a Mesh ID IE to a frame.
3185  */
3186 uint8_t *
3187 ieee80211_add_meshid(uint8_t *frm, struct ieee80211vap *vap)
3188 {
3189         struct ieee80211_mesh_state *ms = vap->iv_mesh;
3190
3191         KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a mbss vap"));
3192
3193         *frm++ = IEEE80211_ELEMID_MESHID;
3194         *frm++ = ms->ms_idlen;
3195         memcpy(frm, ms->ms_id, ms->ms_idlen);
3196         return frm + ms->ms_idlen;
3197 }
3198
3199 /*
3200  * Add a Mesh Configuration IE to a frame.
3201  * For now just use HWMP routing, Airtime link metric, Null Congestion
3202  * Signaling, Null Sync Protocol and Null Authentication.
3203  */
3204 uint8_t *
3205 ieee80211_add_meshconf(uint8_t *frm, struct ieee80211vap *vap)
3206 {
3207         const struct ieee80211_mesh_state *ms = vap->iv_mesh;
3208         uint16_t caps;
3209
3210         KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap"));
3211
3212         *frm++ = IEEE80211_ELEMID_MESHCONF;
3213         *frm++ = IEEE80211_MESH_CONF_SZ;
3214         *frm++ = ms->ms_ppath->mpp_ie;          /* path selection */
3215         *frm++ = ms->ms_pmetric->mpm_ie;        /* link metric */
3216         *frm++ = IEEE80211_MESHCONF_CC_DISABLED;
3217         *frm++ = IEEE80211_MESHCONF_SYNC_NEIGHOFF;
3218         *frm++ = IEEE80211_MESHCONF_AUTH_DISABLED;
3219         /* NB: set the number of neighbors before the rest */
3220         *frm = (ms->ms_neighbors > IEEE80211_MESH_MAX_NEIGHBORS ?
3221             IEEE80211_MESH_MAX_NEIGHBORS : ms->ms_neighbors) << 1;
3222         if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE)
3223                 *frm |= IEEE80211_MESHCONF_FORM_GATE;
3224         frm += 1;
3225         caps = 0;
3226         if (ms->ms_flags & IEEE80211_MESHFLAGS_AP)
3227                 caps |= IEEE80211_MESHCONF_CAP_AP;
3228         if (ms->ms_flags & IEEE80211_MESHFLAGS_FWD)
3229                 caps |= IEEE80211_MESHCONF_CAP_FWRD;
3230         *frm++ = caps;
3231         return frm;
3232 }
3233
3234 /*
3235  * Add a Mesh Peer Management IE to a frame.
3236  */
3237 uint8_t *
3238 ieee80211_add_meshpeer(uint8_t *frm, uint8_t subtype, uint16_t localid,
3239     uint16_t peerid, uint16_t reason)
3240 {
3241
3242         KASSERT(localid != 0, ("localid == 0"));
3243
3244         *frm++ = IEEE80211_ELEMID_MESHPEER;
3245         switch (subtype) {
3246         case IEEE80211_ACTION_MESHPEERING_OPEN:
3247                 *frm++ = IEEE80211_MPM_BASE_SZ;         /* length */
3248                 ADDSHORT(frm, IEEE80211_MPPID_MPM);     /* proto */
3249                 ADDSHORT(frm, localid);                 /* local ID */
3250                 break;
3251         case IEEE80211_ACTION_MESHPEERING_CONFIRM:
3252                 KASSERT(peerid != 0, ("sending peer confirm without peer id"));
3253                 *frm++ = IEEE80211_MPM_BASE_SZ + 2;     /* length */
3254                 ADDSHORT(frm, IEEE80211_MPPID_MPM);     /* proto */
3255                 ADDSHORT(frm, localid);                 /* local ID */
3256                 ADDSHORT(frm, peerid);                  /* peer ID */
3257                 break;
3258         case IEEE80211_ACTION_MESHPEERING_CLOSE:
3259                 if (peerid)
3260                         *frm++ = IEEE80211_MPM_MAX_SZ;  /* length */
3261                 else
3262                         *frm++ = IEEE80211_MPM_BASE_SZ + 2; /* length */
3263                 ADDSHORT(frm, IEEE80211_MPPID_MPM);     /* proto */
3264                 ADDSHORT(frm, localid); /* local ID */
3265                 if (peerid)
3266                         ADDSHORT(frm, peerid);  /* peer ID */
3267                 ADDSHORT(frm, reason);
3268                 break;
3269         }
3270         return frm;
3271 }
3272
3273 /*
3274  * Compute an Airtime Link Metric for the link with this node.
3275  *
3276  * Based on Draft 3.0 spec (11B.10, p.149).
3277  */
3278 /*
3279  * Max 802.11s overhead.
3280  */
3281 #define IEEE80211_MESH_MAXOVERHEAD \
3282         (sizeof(struct ieee80211_qosframe_addr4) \
3283          + sizeof(struct ieee80211_meshcntl_ae10) \
3284         + sizeof(struct llc) \
3285         + IEEE80211_ADDR_LEN \
3286         + IEEE80211_WEP_IVLEN \
3287         + IEEE80211_WEP_KIDLEN \
3288         + IEEE80211_WEP_CRCLEN \
3289         + IEEE80211_WEP_MICLEN \
3290         + IEEE80211_CRC_LEN)
3291 uint32_t
3292 mesh_airtime_calc(struct ieee80211_node *ni)
3293 {
3294 #define M_BITS 8
3295 #define S_FACTOR (2 * M_BITS)
3296         struct ieee80211com *ic = ni->ni_ic;
3297         struct ifnet *ifp = ni->ni_vap->iv_ifp;
3298         const static int nbits = 8192 << M_BITS;
3299         uint32_t overhead, rate, errrate;
3300         uint64_t res;
3301
3302         /* Time to transmit a frame */
3303         rate = ni->ni_txrate;
3304         overhead = ieee80211_compute_duration(ic->ic_rt,
3305             ifp->if_mtu + IEEE80211_MESH_MAXOVERHEAD, rate, 0) << M_BITS;
3306         /* Error rate in percentage */
3307         /* XXX assuming small failures are ok */
3308         errrate = (((ifp->if_get_counter(ifp, IFCOUNTER_OERRORS) +
3309             ifp->if_get_counter(ifp, IFCOUNTER_IERRORS)) / 100) << M_BITS)
3310             / 100;
3311         res = (overhead + (nbits / rate)) *
3312             ((1 << S_FACTOR) / ((1 << M_BITS) - errrate));
3313
3314         return (uint32_t)(res >> S_FACTOR);
3315 #undef M_BITS
3316 #undef S_FACTOR
3317 }
3318
3319 /*
3320  * Add a Mesh Link Metric report IE to a frame.
3321  */
3322 uint8_t *
3323 ieee80211_add_meshlmetric(uint8_t *frm, uint8_t flags, uint32_t metric)
3324 {
3325         *frm++ = IEEE80211_ELEMID_MESHLINK;
3326         *frm++ = 5;
3327         *frm++ = flags;
3328         ADDWORD(frm, metric);
3329         return frm;
3330 }
3331
3332 /*
3333  * Add a Mesh Gate Announcement IE to a frame.
3334  */
3335 uint8_t *
3336 ieee80211_add_meshgate(uint8_t *frm, struct ieee80211_meshgann_ie *ie)
3337 {
3338         *frm++ = IEEE80211_ELEMID_MESHGANN; /* ie */
3339         *frm++ = IEEE80211_MESHGANN_BASE_SZ; /* len */
3340         *frm++ = ie->gann_flags;
3341         *frm++ = ie->gann_hopcount;
3342         *frm++ = ie->gann_ttl;
3343         IEEE80211_ADDR_COPY(frm, ie->gann_addr);
3344         frm += 6;
3345         ADDWORD(frm, ie->gann_seq);
3346         ADDSHORT(frm, ie->gann_interval);
3347         return frm;
3348 }
3349 #undef ADDSHORT
3350 #undef ADDWORD
3351
3352 /*
3353  * Initialize any mesh-specific node state.
3354  */
3355 void
3356 ieee80211_mesh_node_init(struct ieee80211vap *vap, struct ieee80211_node *ni)
3357 {
3358         ni->ni_flags |= IEEE80211_NODE_QOS;
3359         callout_init(&ni->ni_mltimer, 1);
3360         callout_init(&ni->ni_mlhtimer, 1);
3361 }
3362
3363 /*
3364  * Cleanup any mesh-specific node state.
3365  */
3366 void
3367 ieee80211_mesh_node_cleanup(struct ieee80211_node *ni)
3368 {
3369         struct ieee80211vap *vap = ni->ni_vap;
3370         struct ieee80211_mesh_state *ms = vap->iv_mesh;
3371
3372         callout_drain(&ni->ni_mltimer);
3373         callout_drain(&ni->ni_mlhtimer);
3374         /* NB: short-circuit callbacks after mesh_vdetach */
3375         if (vap->iv_mesh != NULL)
3376                 ms->ms_ppath->mpp_peerdown(ni);
3377 }
3378
3379 void
3380 ieee80211_parse_meshid(struct ieee80211_node *ni, const uint8_t *ie)
3381 {
3382         ni->ni_meshidlen = ie[1];
3383         memcpy(ni->ni_meshid, ie + 2, ie[1]);
3384 }
3385
3386 /*
3387  * Setup mesh-specific node state on neighbor discovery.
3388  */
3389 void
3390 ieee80211_mesh_init_neighbor(struct ieee80211_node *ni,
3391         const struct ieee80211_frame *wh,
3392         const struct ieee80211_scanparams *sp)
3393 {
3394         ieee80211_parse_meshid(ni, sp->meshid);
3395 }
3396
3397 void
3398 ieee80211_mesh_update_beacon(struct ieee80211vap *vap,
3399         struct ieee80211_beacon_offsets *bo)
3400 {
3401         KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap"));
3402
3403         if (isset(bo->bo_flags, IEEE80211_BEACON_MESHCONF)) {
3404                 (void)ieee80211_add_meshconf(bo->bo_meshconf, vap);
3405                 clrbit(bo->bo_flags, IEEE80211_BEACON_MESHCONF);
3406         }
3407 }
3408
3409 static int
3410 mesh_ioctl_get80211(struct ieee80211vap *vap, struct ieee80211req *ireq)
3411 {
3412         struct ieee80211_mesh_state *ms = vap->iv_mesh;
3413         uint8_t tmpmeshid[IEEE80211_NWID_LEN];
3414         struct ieee80211_mesh_route *rt;
3415         struct ieee80211req_mesh_route *imr;
3416         size_t len, off;
3417         uint8_t *p;
3418         int error;
3419
3420         if (vap->iv_opmode != IEEE80211_M_MBSS)
3421                 return ENOSYS;
3422
3423         error = 0;
3424         switch (ireq->i_type) {
3425         case IEEE80211_IOC_MESH_ID:
3426                 ireq->i_len = ms->ms_idlen;
3427                 memcpy(tmpmeshid, ms->ms_id, ireq->i_len);
3428                 error = copyout(tmpmeshid, ireq->i_data, ireq->i_len);
3429                 break;
3430         case IEEE80211_IOC_MESH_AP:
3431                 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_AP) != 0;
3432                 break;
3433         case IEEE80211_IOC_MESH_FWRD:
3434                 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) != 0;
3435                 break;
3436         case IEEE80211_IOC_MESH_GATE:
3437                 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) != 0;
3438                 break;
3439         case IEEE80211_IOC_MESH_TTL:
3440                 ireq->i_val = ms->ms_ttl;
3441                 break;
3442         case IEEE80211_IOC_MESH_RTCMD:
3443                 switch (ireq->i_val) {
3444                 case IEEE80211_MESH_RTCMD_LIST:
3445                         len = 0;
3446                         MESH_RT_LOCK(ms);
3447                         TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) {
3448                                 len += sizeof(*imr);
3449                         }
3450                         MESH_RT_UNLOCK(ms);
3451                         if (len > ireq->i_len || ireq->i_len < sizeof(*imr)) {
3452                                 ireq->i_len = len;
3453                                 return ENOMEM;
3454                         }
3455                         ireq->i_len = len;
3456                         /* XXX M_WAIT? */
3457                         p = IEEE80211_MALLOC(len, M_TEMP,
3458                             IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
3459                         if (p == NULL)
3460                                 return ENOMEM;
3461                         off = 0;
3462                         MESH_RT_LOCK(ms);
3463                         TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) {
3464                                 if (off >= len)
3465                                         break;
3466                                 imr = (struct ieee80211req_mesh_route *)
3467                                     (p + off);
3468                                 IEEE80211_ADDR_COPY(imr->imr_dest,
3469                                     rt->rt_dest);
3470                                 IEEE80211_ADDR_COPY(imr->imr_nexthop,
3471                                     rt->rt_nexthop);
3472                                 imr->imr_metric = rt->rt_metric;
3473                                 imr->imr_nhops = rt->rt_nhops;
3474                                 imr->imr_lifetime =
3475                                     ieee80211_mesh_rt_update(rt, 0);
3476                                 imr->imr_lastmseq = rt->rt_lastmseq;
3477                                 imr->imr_flags = rt->rt_flags; /* last */
3478                                 off += sizeof(*imr);
3479                         }
3480                         MESH_RT_UNLOCK(ms);
3481                         error = copyout(p, (uint8_t *)ireq->i_data,
3482                             ireq->i_len);
3483                         IEEE80211_FREE(p, M_TEMP);
3484                         break;
3485                 case IEEE80211_MESH_RTCMD_FLUSH:
3486                 case IEEE80211_MESH_RTCMD_ADD:
3487                 case IEEE80211_MESH_RTCMD_DELETE:
3488                         return EINVAL;
3489                 default:
3490                         return ENOSYS;
3491                 }
3492                 break;
3493         case IEEE80211_IOC_MESH_PR_METRIC:
3494                 len = strlen(ms->ms_pmetric->mpm_descr);
3495                 if (ireq->i_len < len)
3496                         return EINVAL;
3497                 ireq->i_len = len;
3498                 error = copyout(ms->ms_pmetric->mpm_descr,
3499                     (uint8_t *)ireq->i_data, len);
3500                 break;
3501         case IEEE80211_IOC_MESH_PR_PATH:
3502                 len = strlen(ms->ms_ppath->mpp_descr);
3503                 if (ireq->i_len < len)
3504                         return EINVAL;
3505                 ireq->i_len = len;
3506                 error = copyout(ms->ms_ppath->mpp_descr,
3507                     (uint8_t *)ireq->i_data, len);
3508                 break;
3509         default:
3510                 return ENOSYS;
3511         }
3512
3513         return error;
3514 }
3515 IEEE80211_IOCTL_GET(mesh, mesh_ioctl_get80211);
3516
3517 static int
3518 mesh_ioctl_set80211(struct ieee80211vap *vap, struct ieee80211req *ireq)
3519 {
3520         struct ieee80211_mesh_state *ms = vap->iv_mesh;
3521         uint8_t tmpmeshid[IEEE80211_NWID_LEN];
3522         uint8_t tmpaddr[IEEE80211_ADDR_LEN];
3523         char tmpproto[IEEE80211_MESH_PROTO_DSZ];
3524         int error;
3525
3526         if (vap->iv_opmode != IEEE80211_M_MBSS)
3527                 return ENOSYS;
3528
3529         error = 0;
3530         switch (ireq->i_type) {
3531         case IEEE80211_IOC_MESH_ID:
3532                 if (ireq->i_val != 0 || ireq->i_len > IEEE80211_MESHID_LEN)
3533                         return EINVAL;
3534                 error = copyin(ireq->i_data, tmpmeshid, ireq->i_len);
3535                 if (error != 0)
3536                         break;
3537                 memset(ms->ms_id, 0, IEEE80211_NWID_LEN);
3538                 ms->ms_idlen = ireq->i_len;
3539                 memcpy(ms->ms_id, tmpmeshid, ireq->i_len);
3540                 error = ENETRESET;
3541                 break;
3542         case IEEE80211_IOC_MESH_AP:
3543                 if (ireq->i_val)
3544                         ms->ms_flags |= IEEE80211_MESHFLAGS_AP;
3545                 else
3546                         ms->ms_flags &= ~IEEE80211_MESHFLAGS_AP;
3547                 error = ENETRESET;
3548                 break;
3549         case IEEE80211_IOC_MESH_FWRD:
3550                 if (ireq->i_val)
3551                         ms->ms_flags |= IEEE80211_MESHFLAGS_FWD;
3552                 else
3553                         ms->ms_flags &= ~IEEE80211_MESHFLAGS_FWD;
3554                 mesh_gatemode_setup(vap);
3555                 break;
3556         case IEEE80211_IOC_MESH_GATE:
3557                 if (ireq->i_val)
3558                         ms->ms_flags |= IEEE80211_MESHFLAGS_GATE;
3559                 else
3560                         ms->ms_flags &= ~IEEE80211_MESHFLAGS_GATE;
3561                 break;
3562         case IEEE80211_IOC_MESH_TTL:
3563                 ms->ms_ttl = (uint8_t) ireq->i_val;
3564                 break;
3565         case IEEE80211_IOC_MESH_RTCMD:
3566                 switch (ireq->i_val) {
3567                 case IEEE80211_MESH_RTCMD_LIST:
3568                         return EINVAL;
3569                 case IEEE80211_MESH_RTCMD_FLUSH:
3570                         ieee80211_mesh_rt_flush(vap);
3571                         break;
3572                 case IEEE80211_MESH_RTCMD_ADD:
3573                         if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ireq->i_data) ||
3574                             IEEE80211_ADDR_EQ(broadcastaddr, ireq->i_data))
3575                                 return EINVAL;
3576                         error = copyin(ireq->i_data, &tmpaddr,
3577                             IEEE80211_ADDR_LEN);
3578                         if (error == 0)
3579                                 ieee80211_mesh_discover(vap, tmpaddr, NULL);
3580                         break;
3581                 case IEEE80211_MESH_RTCMD_DELETE:
3582                         ieee80211_mesh_rt_del(vap, ireq->i_data);
3583                         break;
3584                 default:
3585                         return ENOSYS;
3586                 }
3587                 break;
3588         case IEEE80211_IOC_MESH_PR_METRIC:
3589                 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto));
3590                 if (error == 0) {
3591                         error = mesh_select_proto_metric(vap, tmpproto);
3592                         if (error == 0)
3593                                 error = ENETRESET;
3594                 }
3595                 break;
3596         case IEEE80211_IOC_MESH_PR_PATH:
3597                 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto));
3598                 if (error == 0) {
3599                         error = mesh_select_proto_path(vap, tmpproto);
3600                         if (error == 0)
3601                                 error = ENETRESET;
3602                 }
3603                 break;
3604         default:
3605                 return ENOSYS;
3606         }
3607         return error;
3608 }
3609 IEEE80211_IOCTL_SET(mesh, mesh_ioctl_set80211);