sys/net80211/ieee80211_mesh.c

   1 /*-
   2  * Copyright (c) 2009 The FreeBSD Foundation
   3  * All rights reserved.
   4  *
   5  * This software was developed by Rui Paulo under sponsorship from the
   6  * FreeBSD Foundation.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  */
  29 #include <sys/cdefs.h>
  30 #ifdef __FreeBSD__
  31 __FBSDID("$FreeBSD$");
  32 #endif
  33
  34 /*
  35  * IEEE 802.11s Mesh Point (MBSS) support.
  36  *
  37  * Based on March 2009, D3.0 802.11s draft spec.
  38  */
  39 #include "opt_inet.h"
  40 #include "opt_wlan.h"
  41
  42 #include <sys/param.h>
  43 #include <sys/systm.h>
  44 #include <sys/mbuf.h>
  45 #include <sys/malloc.h>
  46 #include <sys/kernel.h>
  47
  48 #include <sys/socket.h>
  49 #include <sys/sockio.h>
  50 #include <sys/endian.h>
  51 #include <sys/errno.h>
  52 #include <sys/proc.h>
  53 #include <sys/sysctl.h>
  54
  55 #include <net/if.h>
  56 #include <net/if_media.h>
  57 #include <net/if_llc.h>
  58 #include <net/ethernet.h>
  59
  60 #include <net80211/ieee80211_var.h>
  61 #include <net80211/ieee80211_action.h>
  62 #include <net80211/ieee80211_input.h>
  63 #include <net80211/ieee80211_mesh.h>
  64
  65 static void     mesh_rt_flush_invalid(struct ieee80211vap *);
  66 static int      mesh_select_proto_path(struct ieee80211vap *, const char *);
  67 static int      mesh_select_proto_metric(struct ieee80211vap *, const char *);
  68 static void     mesh_vattach(struct ieee80211vap *);
  69 static int      mesh_newstate(struct ieee80211vap *, enum ieee80211_state, int);
  70 static void     mesh_rt_cleanup_cb(void *);
  71 static void     mesh_linkchange(struct ieee80211_node *,
  72                     enum ieee80211_mesh_mlstate);
  73 static void     mesh_checkid(void *, struct ieee80211_node *);
  74 static uint32_t mesh_generateid(struct ieee80211vap *);
  75 static int      mesh_checkpseq(struct ieee80211vap *,
  76                     const uint8_t [IEEE80211_ADDR_LEN], uint32_t);
  77 static struct ieee80211_node *
  78                 mesh_find_txnode(struct ieee80211vap *,
  79                     const uint8_t [IEEE80211_ADDR_LEN]);
  80 static void     mesh_forward(struct ieee80211vap *, struct mbuf *,
  81                     const struct ieee80211_meshcntl *);
  82 static int      mesh_input(struct ieee80211_node *, struct mbuf *, int, int);
  83 static void     mesh_recv_mgmt(struct ieee80211_node *, struct mbuf *, int,
  84                     int, int);
  85 static void     mesh_recv_ctl(struct ieee80211_node *, struct mbuf *, int);
  86 static void     mesh_peer_timeout_setup(struct ieee80211_node *);
  87 static void     mesh_peer_timeout_backoff(struct ieee80211_node *);
  88 static void     mesh_peer_timeout_cb(void *);
  89 static __inline void
  90                 mesh_peer_timeout_stop(struct ieee80211_node *);
  91 static int      mesh_verify_meshid(struct ieee80211vap *, const uint8_t *);
  92 static int      mesh_verify_meshconf(struct ieee80211vap *, const uint8_t *);
  93 static int      mesh_verify_meshpeer(struct ieee80211vap *, uint8_t,
  94                     const uint8_t *);
  95 uint32_t        mesh_airtime_calc(struct ieee80211_node *);
  96
  97 /*
  98  * Timeout values come from the specification and are in milliseconds.
  99  */
 100 static SYSCTL_NODE(_net_wlan, OID_AUTO, mesh, CTLFLAG_RD, 0,
 101     "IEEE 802.11s parameters");
 102 static int ieee80211_mesh_retrytimeout = -1;
 103 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, retrytimeout, CTLTYPE_INT | CTLFLAG_RW,
 104     &ieee80211_mesh_retrytimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
 105     "Retry timeout (msec)");
 106 static int ieee80211_mesh_holdingtimeout = -1;
 107 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, holdingtimeout, CTLTYPE_INT | CTLFLAG_RW,
 108     &ieee80211_mesh_holdingtimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
 109     "Holding state timeout (msec)");
 110 static int ieee80211_mesh_confirmtimeout = -1;
 111 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, confirmtimeout, CTLTYPE_INT | CTLFLAG_RW,
 112     &ieee80211_mesh_confirmtimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
 113     "Confirm state timeout (msec)");
 114 static int ieee80211_mesh_maxretries = 2;
 115 SYSCTL_INT(_net_wlan_mesh, OID_AUTO, maxretries, CTLTYPE_INT | CTLFLAG_RW,
 116     &ieee80211_mesh_maxretries, 0,
 117     "Maximum retries during peer link establishment");
 118
 119 static const uint8_t broadcastaddr[IEEE80211_ADDR_LEN] =
 120         { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 121
 122 static  ieee80211_recv_action_func mesh_recv_action_meshpeering_open;
 123 static  ieee80211_recv_action_func mesh_recv_action_meshpeering_confirm;
 124 static  ieee80211_recv_action_func mesh_recv_action_meshpeering_close;
 125 static  ieee80211_recv_action_func mesh_recv_action_meshlmetric;
 126
 127 static  ieee80211_send_action_func mesh_send_action_meshpeering_open;
 128 static  ieee80211_send_action_func mesh_send_action_meshpeering_confirm;
 129 static  ieee80211_send_action_func mesh_send_action_meshpeering_close;
 130 static  ieee80211_send_action_func mesh_send_action_meshlmetric;
 131
 132 static const struct ieee80211_mesh_proto_metric mesh_metric_airtime = {
 133         .mpm_descr      = "AIRTIME",
 134         .mpm_ie         = IEEE80211_MESHCONF_METRIC_AIRTIME,
 135         .mpm_metric     = mesh_airtime_calc,
 136 };
 137
 138 static struct ieee80211_mesh_proto_path         mesh_proto_paths[4];
 139 static struct ieee80211_mesh_proto_metric       mesh_proto_metrics[4];
 140
 141 #define RT_ENTRY_LOCK(rt)       mtx_lock(&(rt)->rt_lock)
 142 #define RT_ENTRY_LOCK_ASSERT(rt) mtx_assert(&(rt)->rt_lock, MA_OWNED)
 143 #define RT_ENTRY_UNLOCK(rt)     mtx_unlock(&(rt)->rt_lock)
 144
 145 #define MESH_RT_LOCK(ms)        mtx_lock(&(ms)->ms_rt_lock)
 146 #define MESH_RT_LOCK_ASSERT(ms) mtx_assert(&(ms)->ms_rt_lock, MA_OWNED)
 147 #define MESH_RT_UNLOCK(ms)      mtx_unlock(&(ms)->ms_rt_lock)
 148
 149 MALLOC_DEFINE(M_80211_MESH_PREQ, "80211preq", "802.11 MESH Path Request frame");
 150 MALLOC_DEFINE(M_80211_MESH_PREP, "80211prep", "802.11 MESH Path Reply frame");
 151 MALLOC_DEFINE(M_80211_MESH_PERR, "80211perr", "802.11 MESH Path Error frame");
 152
 153 /* The longer one of the lifetime should be stored as new lifetime */
 154 #define MESH_ROUTE_LIFETIME_MAX(a, b)   (a > b ? a : b)
 155
 156 MALLOC_DEFINE(M_80211_MESH_RT, "80211mesh", "802.11s routing table");
 157
 158 /*
 159  * Helper functions to manipulate the Mesh routing table.
 160  */
 161
 162 static struct ieee80211_mesh_route *
 163 mesh_rt_find_locked(struct ieee80211_mesh_state *ms,
 164     const uint8_t dest[IEEE80211_ADDR_LEN])
 165 {
 166         struct ieee80211_mesh_route *rt;
 167
 168         MESH_RT_LOCK_ASSERT(ms);
 169
 170         TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) {
 171                 if (IEEE80211_ADDR_EQ(dest, rt->rt_dest))
 172                         return rt;
 173         }
 174         return NULL;
 175 }
 176
 177 static struct ieee80211_mesh_route *
 178 mesh_rt_add_locked(struct ieee80211vap *vap,
 179     const uint8_t dest[IEEE80211_ADDR_LEN])
 180 {
 181         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 182         struct ieee80211_mesh_route *rt;
 183
 184         KASSERT(!IEEE80211_ADDR_EQ(broadcastaddr, dest),
 185             ("%s: adding broadcast to the routing table", __func__));
 186
 187         MESH_RT_LOCK_ASSERT(ms);
 188
 189         rt = malloc(ALIGN(sizeof(struct ieee80211_mesh_route)) +
 190             ms->ms_ppath->mpp_privlen, M_80211_MESH_RT, M_NOWAIT | M_ZERO);
 191         if (rt != NULL) {
 192                 rt->rt_vap = vap;
 193                 IEEE80211_ADDR_COPY(rt->rt_dest, dest);
 194                 rt->rt_priv = (void *)ALIGN(&rt[1]);
 195                 mtx_init(&rt->rt_lock, "MBSS_RT", "802.11s route entry", MTX_DEF);
 196                 callout_init(&rt->rt_discovery, CALLOUT_MPSAFE);
 197                 rt->rt_updtime = ticks; /* create time */
 198                 TAILQ_INSERT_TAIL(&ms->ms_routes, rt, rt_next);
 199         }
 200         return rt;
 201 }
 202
 203 struct ieee80211_mesh_route *
 204 ieee80211_mesh_rt_find(struct ieee80211vap *vap,
 205     const uint8_t dest[IEEE80211_ADDR_LEN])
 206 {
 207         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 208         struct ieee80211_mesh_route *rt;
 209
 210         MESH_RT_LOCK(ms);
 211         rt = mesh_rt_find_locked(ms, dest);
 212         MESH_RT_UNLOCK(ms);
 213         return rt;
 214 }
 215
 216 struct ieee80211_mesh_route *
 217 ieee80211_mesh_rt_add(struct ieee80211vap *vap,
 218     const uint8_t dest[IEEE80211_ADDR_LEN])
 219 {
 220         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 221         struct ieee80211_mesh_route *rt;
 222
 223         KASSERT(ieee80211_mesh_rt_find(vap, dest) == NULL,
 224             ("%s: duplicate entry in the routing table", __func__));
 225         KASSERT(!IEEE80211_ADDR_EQ(vap->iv_myaddr, dest),
 226             ("%s: adding self to the routing table", __func__));
 227
 228         MESH_RT_LOCK(ms);
 229         rt = mesh_rt_add_locked(vap, dest);
 230         MESH_RT_UNLOCK(ms);
 231         return rt;
 232 }
 233
 234 /*
 235  * Update the route lifetime and returns the updated lifetime.
 236  * If new_lifetime is zero and route is timedout it will be invalidated.
 237  * new_lifetime is in msec
 238  */
 239 int
 240 ieee80211_mesh_rt_update(struct ieee80211_mesh_route *rt, int new_lifetime)
 241 {
 242         int timesince, now;
 243         uint32_t lifetime = 0;
 244
 245         KASSERT(rt != NULL, ("route is NULL"));
 246
 247         now = ticks;
 248         RT_ENTRY_LOCK(rt);
 249
 250         /* dont clobber a proxy entry gated by us */
 251         if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY && rt->rt_nhops == 0) {
 252                 RT_ENTRY_UNLOCK(rt);
 253                 return rt->rt_lifetime;
 254         }
 255
 256         timesince = ticks_to_msecs(now - rt->rt_updtime);
 257         rt->rt_updtime = now;
 258         if (timesince >= rt->rt_lifetime) {
 259                 if (new_lifetime != 0) {
 260                         rt->rt_lifetime = new_lifetime;
 261                 }
 262                 else {
 263                         rt->rt_flags &= ~IEEE80211_MESHRT_FLAGS_VALID;
 264                         rt->rt_lifetime = 0;
 265                 }
 266         } else {
 267                 /* update what is left of lifetime */
 268                 rt->rt_lifetime = rt->rt_lifetime - timesince;
 269                 rt->rt_lifetime  = MESH_ROUTE_LIFETIME_MAX(
 270                         new_lifetime, rt->rt_lifetime);
 271         }
 272         lifetime = rt->rt_lifetime;
 273         RT_ENTRY_UNLOCK(rt);
 274
 275         return lifetime;
 276 }
 277
 278 /*
 279  * Add a proxy route (as needed) for the specified destination.
 280  */
 281 void
 282 ieee80211_mesh_proxy_check(struct ieee80211vap *vap,
 283     const uint8_t dest[IEEE80211_ADDR_LEN])
 284 {
 285         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 286         struct ieee80211_mesh_route *rt;
 287
 288         MESH_RT_LOCK(ms);
 289         rt = mesh_rt_find_locked(ms, dest);
 290         if (rt == NULL) {
 291                 rt = mesh_rt_add_locked(vap, dest);
 292                 if (rt == NULL) {
 293                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
 294                             "%s", "unable to add proxy entry");
 295                         vap->iv_stats.is_mesh_rtaddfailed++;
 296                 } else {
 297                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
 298                             "%s", "add proxy entry");
 299                         IEEE80211_ADDR_COPY(rt->rt_mesh_gate, vap->iv_myaddr);
 300                         IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr);
 301                         rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID
 302                                      |  IEEE80211_MESHRT_FLAGS_PROXY;
 303                 }
 304         } else if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) {
 305                 KASSERT(rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY,
 306                     ("no proxy flag for poxy entry"));
 307                 struct ieee80211com *ic = vap->iv_ic;
 308                 /*
 309                  * Fix existing entry created by received frames from
 310                  * stations that have some memory of dest.  We also
 311                  * flush any frames held on the staging queue; delivering
 312                  * them is too much trouble right now.
 313                  */
 314                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
 315                     "%s", "fix proxy entry");
 316                 IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr);
 317                 rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID
 318                              |  IEEE80211_MESHRT_FLAGS_PROXY;
 319                 /* XXX belongs in hwmp */
 320                 ieee80211_ageq_drain_node(&ic->ic_stageq,
 321                    (void *)(uintptr_t) ieee80211_mac_hash(ic, dest));
 322                 /* XXX stat? */
 323         }
 324         MESH_RT_UNLOCK(ms);
 325 }
 326
 327 static __inline void
 328 mesh_rt_del(struct ieee80211_mesh_state *ms, struct ieee80211_mesh_route *rt)
 329 {
 330         TAILQ_REMOVE(&ms->ms_routes, rt, rt_next);
 331         /*
 332          * Grab the lock before destroying it, to be sure no one else
 333          * is holding the route.
 334          */
 335         RT_ENTRY_LOCK(rt);
 336         callout_drain(&rt->rt_discovery);
 337         mtx_destroy(&rt->rt_lock);
 338         free(rt, M_80211_MESH_RT);
 339 }
 340
 341 void
 342 ieee80211_mesh_rt_del(struct ieee80211vap *vap,
 343     const uint8_t dest[IEEE80211_ADDR_LEN])
 344 {
 345         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 346         struct ieee80211_mesh_route *rt, *next;
 347
 348         MESH_RT_LOCK(ms);
 349         TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) {
 350                 if (IEEE80211_ADDR_EQ(rt->rt_dest, dest)) {
 351                         if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) {
 352                                 ms->ms_ppath->mpp_senderror(vap, dest, rt,
 353                                     IEEE80211_REASON_MESH_PERR_NO_PROXY);
 354                         } else {
 355                                 ms->ms_ppath->mpp_senderror(vap, dest, rt,
 356                                     IEEE80211_REASON_MESH_PERR_DEST_UNREACH);
 357                         }
 358                         mesh_rt_del(ms, rt);
 359                         MESH_RT_UNLOCK(ms);
 360                         return;
 361                 }
 362         }
 363         MESH_RT_UNLOCK(ms);
 364 }
 365
 366 void
 367 ieee80211_mesh_rt_flush(struct ieee80211vap *vap)
 368 {
 369         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 370         struct ieee80211_mesh_route *rt, *next;
 371
 372         if (ms == NULL)
 373                 return;
 374         MESH_RT_LOCK(ms);
 375         TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next)
 376                 mesh_rt_del(ms, rt);
 377         MESH_RT_UNLOCK(ms);
 378 }
 379
 380 void
 381 ieee80211_mesh_rt_flush_peer(struct ieee80211vap *vap,
 382     const uint8_t peer[IEEE80211_ADDR_LEN])
 383 {
 384         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 385         struct ieee80211_mesh_route *rt, *next;
 386
 387         MESH_RT_LOCK(ms);
 388         TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) {
 389                 if (IEEE80211_ADDR_EQ(rt->rt_nexthop, peer))
 390                         mesh_rt_del(ms, rt);
 391         }
 392         MESH_RT_UNLOCK(ms);
 393 }
 394
 395 /*
 396  * Flush expired routing entries, i.e. those in invalid state for
 397  * some time.
 398  */
 399 static void
 400 mesh_rt_flush_invalid(struct ieee80211vap *vap)
 401 {
 402         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 403         struct ieee80211_mesh_route *rt, *next;
 404
 405         if (ms == NULL)
 406                 return;
 407         MESH_RT_LOCK(ms);
 408         TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) {
 409                 /* Discover paths will be deleted by their own callout */
 410                 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_DISCOVER)
 411                         continue;
 412                 ieee80211_mesh_rt_update(rt, 0);
 413                 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0)
 414                         mesh_rt_del(ms, rt);
 415         }
 416         MESH_RT_UNLOCK(ms);
 417 }
 418
 419 #define N(a)    (sizeof(a) / sizeof(a[0]))
 420 int
 421 ieee80211_mesh_register_proto_path(const struct ieee80211_mesh_proto_path *mpp)
 422 {
 423         int i, firstempty = -1;
 424
 425         for (i = 0; i < N(mesh_proto_paths); i++) {
 426                 if (strncmp(mpp->mpp_descr, mesh_proto_paths[i].mpp_descr,
 427                     IEEE80211_MESH_PROTO_DSZ) == 0)
 428                         return EEXIST;
 429                 if (!mesh_proto_paths[i].mpp_active && firstempty == -1)
 430                         firstempty = i;
 431         }
 432         if (firstempty < 0)
 433                 return ENOSPC;
 434         memcpy(&mesh_proto_paths[firstempty], mpp, sizeof(*mpp));
 435         mesh_proto_paths[firstempty].mpp_active = 1;
 436         return 0;
 437 }
 438
 439 int
 440 ieee80211_mesh_register_proto_metric(const struct
 441     ieee80211_mesh_proto_metric *mpm)
 442 {
 443         int i, firstempty = -1;
 444
 445         for (i = 0; i < N(mesh_proto_metrics); i++) {
 446                 if (strncmp(mpm->mpm_descr, mesh_proto_metrics[i].mpm_descr,
 447                     IEEE80211_MESH_PROTO_DSZ) == 0)
 448                         return EEXIST;
 449                 if (!mesh_proto_metrics[i].mpm_active && firstempty == -1)
 450                         firstempty = i;
 451         }
 452         if (firstempty < 0)
 453                 return ENOSPC;
 454         memcpy(&mesh_proto_metrics[firstempty], mpm, sizeof(*mpm));
 455         mesh_proto_metrics[firstempty].mpm_active = 1;
 456         return 0;
 457 }
 458
 459 static int
 460 mesh_select_proto_path(struct ieee80211vap *vap, const char *name)
 461 {
 462         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 463         int i;
 464
 465         for (i = 0; i < N(mesh_proto_paths); i++) {
 466                 if (strcasecmp(mesh_proto_paths[i].mpp_descr, name) == 0) {
 467                         ms->ms_ppath = &mesh_proto_paths[i];
 468                         return 0;
 469                 }
 470         }
 471         return ENOENT;
 472 }
 473
 474 static int
 475 mesh_select_proto_metric(struct ieee80211vap *vap, const char *name)
 476 {
 477         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 478         int i;
 479
 480         for (i = 0; i < N(mesh_proto_metrics); i++) {
 481                 if (strcasecmp(mesh_proto_metrics[i].mpm_descr, name) == 0) {
 482                         ms->ms_pmetric = &mesh_proto_metrics[i];
 483                         return 0;
 484                 }
 485         }
 486         return ENOENT;
 487 }
 488 #undef  N
 489
 490 static void
 491 ieee80211_mesh_init(void)
 492 {
 493
 494         memset(mesh_proto_paths, 0, sizeof(mesh_proto_paths));
 495         memset(mesh_proto_metrics, 0, sizeof(mesh_proto_metrics));
 496
 497         /*
 498          * Setup mesh parameters that depends on the clock frequency.
 499          */
 500         ieee80211_mesh_retrytimeout = msecs_to_ticks(40);
 501         ieee80211_mesh_holdingtimeout = msecs_to_ticks(40);
 502         ieee80211_mesh_confirmtimeout = msecs_to_ticks(40);
 503
 504         /*
 505          * Register action frame handlers.
 506          */
 507         ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
 508             IEEE80211_ACTION_MESHPEERING_OPEN,
 509             mesh_recv_action_meshpeering_open);
 510         ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
 511             IEEE80211_ACTION_MESHPEERING_CONFIRM,
 512             mesh_recv_action_meshpeering_confirm);
 513         ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
 514             IEEE80211_ACTION_MESHPEERING_CLOSE,
 515             mesh_recv_action_meshpeering_close);
 516         ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESH,
 517             IEEE80211_ACTION_MESH_LMETRIC, mesh_recv_action_meshlmetric);
 518
 519         ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
 520             IEEE80211_ACTION_MESHPEERING_OPEN,
 521             mesh_send_action_meshpeering_open);
 522         ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
 523             IEEE80211_ACTION_MESHPEERING_CONFIRM,
 524             mesh_send_action_meshpeering_confirm);
 525         ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
 526             IEEE80211_ACTION_MESHPEERING_CLOSE,
 527             mesh_send_action_meshpeering_close);
 528         ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESH,
 529             IEEE80211_ACTION_MESH_LMETRIC,
 530             mesh_send_action_meshlmetric);
 531
 532         /*
 533          * Register Airtime Link Metric.
 534          */
 535         ieee80211_mesh_register_proto_metric(&mesh_metric_airtime);
 536
 537 }
 538 SYSINIT(wlan_mesh, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_mesh_init, NULL);
 539
 540 void
 541 ieee80211_mesh_attach(struct ieee80211com *ic)
 542 {
 543         ic->ic_vattach[IEEE80211_M_MBSS] = mesh_vattach;
 544 }
 545
 546 void
 547 ieee80211_mesh_detach(struct ieee80211com *ic)
 548 {
 549 }
 550
 551 static void
 552 mesh_vdetach_peers(void *arg, struct ieee80211_node *ni)
 553 {
 554         struct ieee80211com *ic = ni->ni_ic;
 555         uint16_t args[3];
 556
 557         if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED) {
 558                 args[0] = ni->ni_mlpid;
 559                 args[1] = ni->ni_mllid;
 560                 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
 561                 ieee80211_send_action(ni,
 562                     IEEE80211_ACTION_CAT_SELF_PROT,
 563                     IEEE80211_ACTION_MESHPEERING_CLOSE,
 564                     args);
 565         }
 566         callout_drain(&ni->ni_mltimer);
 567         /* XXX belongs in hwmp */
 568         ieee80211_ageq_drain_node(&ic->ic_stageq,
 569            (void *)(uintptr_t) ieee80211_mac_hash(ic, ni->ni_macaddr));
 570 }
 571
 572 static void
 573 mesh_vdetach(struct ieee80211vap *vap)
 574 {
 575         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 576
 577         callout_drain(&ms->ms_cleantimer);
 578         ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_vdetach_peers,
 579             NULL);
 580         ieee80211_mesh_rt_flush(vap);
 581         mtx_destroy(&ms->ms_rt_lock);
 582         ms->ms_ppath->mpp_vdetach(vap);
 583         free(vap->iv_mesh, M_80211_VAP);
 584         vap->iv_mesh = NULL;
 585 }
 586
 587 static void
 588 mesh_vattach(struct ieee80211vap *vap)
 589 {
 590         struct ieee80211_mesh_state *ms;
 591         vap->iv_newstate = mesh_newstate;
 592         vap->iv_input = mesh_input;
 593         vap->iv_opdetach = mesh_vdetach;
 594         vap->iv_recv_mgmt = mesh_recv_mgmt;
 595         vap->iv_recv_ctl = mesh_recv_ctl;
 596         ms = malloc(sizeof(struct ieee80211_mesh_state), M_80211_VAP,
 597             M_NOWAIT | M_ZERO);
 598         if (ms == NULL) {
 599                 printf("%s: couldn't alloc MBSS state\n", __func__);
 600                 return;
 601         }
 602         vap->iv_mesh = ms;
 603         ms->ms_seq = 0;
 604         ms->ms_flags = (IEEE80211_MESHFLAGS_AP | IEEE80211_MESHFLAGS_FWD);
 605         ms->ms_ttl = IEEE80211_MESH_DEFAULT_TTL;
 606         TAILQ_INIT(&ms->ms_routes);
 607         mtx_init(&ms->ms_rt_lock, "MBSS", "802.11s routing table", MTX_DEF);
 608         callout_init(&ms->ms_cleantimer, CALLOUT_MPSAFE);
 609         mesh_select_proto_metric(vap, "AIRTIME");
 610         KASSERT(ms->ms_pmetric, ("ms_pmetric == NULL"));
 611         mesh_select_proto_path(vap, "HWMP");
 612         KASSERT(ms->ms_ppath, ("ms_ppath == NULL"));
 613         ms->ms_ppath->mpp_vattach(vap);
 614 }
 615
 616 /*
 617  * IEEE80211_M_MBSS vap state machine handler.
 618  */
 619 static int
 620 mesh_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
 621 {
 622         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 623         struct ieee80211com *ic = vap->iv_ic;
 624         struct ieee80211_node *ni;
 625         enum ieee80211_state ostate;
 626
 627         IEEE80211_LOCK_ASSERT(ic);
 628
 629         ostate = vap->iv_state;
 630         IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n",
 631             __func__, ieee80211_state_name[ostate],
 632             ieee80211_state_name[nstate], arg);
 633         vap->iv_state = nstate;         /* state transition */
 634         if (ostate != IEEE80211_S_SCAN)
 635                 ieee80211_cancel_scan(vap);     /* background scan */
 636         ni = vap->iv_bss;                       /* NB: no reference held */
 637         if (nstate != IEEE80211_S_RUN && ostate == IEEE80211_S_RUN)
 638                 callout_drain(&ms->ms_cleantimer);
 639         switch (nstate) {
 640         case IEEE80211_S_INIT:
 641                 switch (ostate) {
 642                 case IEEE80211_S_SCAN:
 643                         ieee80211_cancel_scan(vap);
 644                         break;
 645                 case IEEE80211_S_CAC:
 646                         ieee80211_dfs_cac_stop(vap);
 647                         break;
 648                 case IEEE80211_S_RUN:
 649                         ieee80211_iterate_nodes(&ic->ic_sta,
 650                             mesh_vdetach_peers, NULL);
 651                         break;
 652                 default:
 653                         break;
 654                 }
 655                 if (ostate != IEEE80211_S_INIT) {
 656                         /* NB: optimize INIT -> INIT case */
 657                         ieee80211_reset_bss(vap);
 658                         ieee80211_mesh_rt_flush(vap);
 659                 }
 660                 break;
 661         case IEEE80211_S_SCAN:
 662                 switch (ostate) {
 663                 case IEEE80211_S_INIT:
 664                         if (vap->iv_des_chan != IEEE80211_CHAN_ANYC &&
 665                             !IEEE80211_IS_CHAN_RADAR(vap->iv_des_chan) &&
 666                             ms->ms_idlen != 0) {
 667                                 /*
 668                                  * Already have a channel and a mesh ID; bypass
 669                                  * the scan and startup immediately.
 670                                  */
 671                                 ieee80211_create_ibss(vap, vap->iv_des_chan);
 672                                 break;
 673                         }
 674                         /*
 675                          * Initiate a scan.  We can come here as a result
 676                          * of an IEEE80211_IOC_SCAN_REQ too in which case
 677                          * the vap will be marked with IEEE80211_FEXT_SCANREQ
 678                          * and the scan request parameters will be present
 679                          * in iv_scanreq.  Otherwise we do the default.
 680                         */
 681                         if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) {
 682                                 ieee80211_check_scan(vap,
 683                                     vap->iv_scanreq_flags,
 684                                     vap->iv_scanreq_duration,
 685                                     vap->iv_scanreq_mindwell,
 686                                     vap->iv_scanreq_maxdwell,
 687                                     vap->iv_scanreq_nssid, vap->iv_scanreq_ssid);
 688                                 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ;
 689                         } else
 690                                 ieee80211_check_scan_current(vap);
 691                         break;
 692                 default:
 693                         break;
 694                 }
 695                 break;
 696         case IEEE80211_S_CAC:
 697                 /*
 698                  * Start CAC on a DFS channel.  We come here when starting
 699                  * a bss on a DFS channel (see ieee80211_create_ibss).
 700                  */
 701                 ieee80211_dfs_cac_start(vap);
 702                 break;
 703         case IEEE80211_S_RUN:
 704                 switch (ostate) {
 705                 case IEEE80211_S_INIT:
 706                         /*
 707                          * Already have a channel; bypass the
 708                          * scan and startup immediately.
 709                          * Note that ieee80211_create_ibss will call
 710                          * back to do a RUN->RUN state change.
 711                          */
 712                         ieee80211_create_ibss(vap,
 713                             ieee80211_ht_adjust_channel(ic,
 714                                 ic->ic_curchan, vap->iv_flags_ht));
 715                         /* NB: iv_bss is changed on return */
 716                         break;
 717                 case IEEE80211_S_CAC:
 718                         /*
 719                          * NB: This is the normal state change when CAC
 720                          * expires and no radar was detected; no need to
 721                          * clear the CAC timer as it's already expired.
 722                          */
 723                         /* fall thru... */
 724                 case IEEE80211_S_CSA:
 725 #if 0
 726                         /*
 727                          * Shorten inactivity timer of associated stations
 728                          * to weed out sta's that don't follow a CSA.
 729                          */
 730                         ieee80211_iterate_nodes(&ic->ic_sta, sta_csa, vap);
 731 #endif
 732                         /*
 733                          * Update bss node channel to reflect where
 734                          * we landed after CSA.
 735                          */
 736                         ieee80211_node_set_chan(vap->iv_bss,
 737                             ieee80211_ht_adjust_channel(ic, ic->ic_curchan,
 738                                 ieee80211_htchanflags(vap->iv_bss->ni_chan)));
 739                         /* XXX bypass debug msgs */
 740                         break;
 741                 case IEEE80211_S_SCAN:
 742                 case IEEE80211_S_RUN:
 743 #ifdef IEEE80211_DEBUG
 744                         if (ieee80211_msg_debug(vap)) {
 745                                 struct ieee80211_node *ni = vap->iv_bss;
 746                                 ieee80211_note(vap,
 747                                     "synchronized with %s meshid ",
 748                                     ether_sprintf(ni->ni_meshid));
 749                                 ieee80211_print_essid(ni->ni_meshid,
 750                                     ni->ni_meshidlen);
 751                                 /* XXX MCS/HT */
 752                                 printf(" channel %d\n",
 753                                     ieee80211_chan2ieee(ic, ic->ic_curchan));
 754                         }
 755 #endif
 756                         break;
 757                 default:
 758                         break;
 759                 }
 760                 ieee80211_node_authorize(vap->iv_bss);
 761                 callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact,
 762                     mesh_rt_cleanup_cb, vap);
 763                 break;
 764         default:
 765                 break;
 766         }
 767         /* NB: ostate not nstate */
 768         ms->ms_ppath->mpp_newstate(vap, ostate, arg);
 769         return 0;
 770 }
 771
 772 static void
 773 mesh_rt_cleanup_cb(void *arg)
 774 {
 775         struct ieee80211vap *vap = arg;
 776         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 777
 778         mesh_rt_flush_invalid(vap);
 779         callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact,
 780             mesh_rt_cleanup_cb, vap);
 781 }
 782
 783
 784 /*
 785  * Helper function to note the Mesh Peer Link FSM change.
 786  */
 787 static void
 788 mesh_linkchange(struct ieee80211_node *ni, enum ieee80211_mesh_mlstate state)
 789 {
 790         struct ieee80211vap *vap = ni->ni_vap;
 791         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 792 #ifdef IEEE80211_DEBUG
 793         static const char *meshlinkstates[] = {
 794                 [IEEE80211_NODE_MESH_IDLE]              = "IDLE",
 795                 [IEEE80211_NODE_MESH_OPENSNT]           = "OPEN SENT",
 796                 [IEEE80211_NODE_MESH_OPENRCV]           = "OPEN RECEIVED",
 797                 [IEEE80211_NODE_MESH_CONFIRMRCV]        = "CONFIRM RECEIVED",
 798                 [IEEE80211_NODE_MESH_ESTABLISHED]       = "ESTABLISHED",
 799                 [IEEE80211_NODE_MESH_HOLDING]           = "HOLDING"
 800         };
 801 #endif
 802         IEEE80211_NOTE(vap, IEEE80211_MSG_MESH,
 803             ni, "peer link: %s -> %s",
 804             meshlinkstates[ni->ni_mlstate], meshlinkstates[state]);
 805
 806         /* track neighbor count */
 807         if (state == IEEE80211_NODE_MESH_ESTABLISHED &&
 808             ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) {
 809                 KASSERT(ms->ms_neighbors < 65535, ("neighbor count overflow"));
 810                 ms->ms_neighbors++;
 811                 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF);
 812         } else if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED &&
 813             state != IEEE80211_NODE_MESH_ESTABLISHED) {
 814                 KASSERT(ms->ms_neighbors > 0, ("neighbor count 0"));
 815                 ms->ms_neighbors--;
 816                 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF);
 817         }
 818         ni->ni_mlstate = state;
 819         switch (state) {
 820         case IEEE80211_NODE_MESH_HOLDING:
 821                 ms->ms_ppath->mpp_peerdown(ni);
 822                 break;
 823         case IEEE80211_NODE_MESH_ESTABLISHED:
 824                 ieee80211_mesh_discover(vap, ni->ni_macaddr, NULL);
 825                 break;
 826         default:
 827                 break;
 828         }
 829 }
 830
 831 /*
 832  * Helper function to generate a unique local ID required for mesh
 833  * peer establishment.
 834  */
 835 static void
 836 mesh_checkid(void *arg, struct ieee80211_node *ni)
 837 {
 838         uint16_t *r = arg;
 839
 840         if (*r == ni->ni_mllid)
 841                 *(uint16_t *)arg = 0;
 842 }
 843
 844 static uint32_t
 845 mesh_generateid(struct ieee80211vap *vap)
 846 {
 847         int maxiter = 4;
 848         uint16_t r;
 849
 850         do {
 851                 get_random_bytes(&r, 2);
 852                 ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_checkid, &r);
 853                 maxiter--;
 854         } while (r == 0 && maxiter > 0);
 855         return r;
 856 }
 857
 858 /*
 859  * Verifies if we already received this packet by checking its
 860  * sequence number.
 861  * Returns 0 if the frame is to be accepted, 1 otherwise.
 862  */
 863 static int
 864 mesh_checkpseq(struct ieee80211vap *vap,
 865     const uint8_t source[IEEE80211_ADDR_LEN], uint32_t seq)
 866 {
 867         struct ieee80211_mesh_route *rt;
 868
 869         rt = ieee80211_mesh_rt_find(vap, source);
 870         if (rt == NULL) {
 871                 rt = ieee80211_mesh_rt_add(vap, source);
 872                 if (rt == NULL) {
 873                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source,
 874                             "%s", "add mcast route failed");
 875                         vap->iv_stats.is_mesh_rtaddfailed++;
 876                         return 1;
 877                 }
 878                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source,
 879                     "add mcast route, mesh seqno %d", seq);
 880                 rt->rt_lastmseq = seq;
 881                 return 0;
 882         }
 883         if (IEEE80211_MESH_SEQ_GEQ(rt->rt_lastmseq, seq)) {
 884                 return 1;
 885         } else {
 886                 rt->rt_lastmseq = seq;
 887                 return 0;
 888         }
 889 }
 890
 891 /*
 892  * Iterate the routing table and locate the next hop.
 893  */
 894 static struct ieee80211_node *
 895 mesh_find_txnode(struct ieee80211vap *vap,
 896     const uint8_t dest[IEEE80211_ADDR_LEN])
 897 {
 898         struct ieee80211_mesh_route *rt;
 899
 900         rt = ieee80211_mesh_rt_find(vap, dest);
 901         if (rt == NULL)
 902                 return NULL;
 903         if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0 ||
 904             (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY)) {
 905                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
 906                     "%s: !valid or proxy, flags 0x%x", __func__, rt->rt_flags);
 907                 /* XXX stat */
 908                 return NULL;
 909         }
 910         return ieee80211_find_txnode(vap, rt->rt_nexthop);
 911 }
 912
 913 /*
 914  * Forward the specified frame.
 915  * Decrement the TTL and set TA to our MAC address.
 916  */
 917 static void
 918 mesh_forward(struct ieee80211vap *vap, struct mbuf *m,
 919     const struct ieee80211_meshcntl *mc)
 920 {
 921         struct ieee80211com *ic = vap->iv_ic;
 922         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 923         struct ifnet *ifp = vap->iv_ifp;
 924         struct ifnet *parent = ic->ic_ifp;
 925         const struct ieee80211_frame *wh =
 926             mtod(m, const struct ieee80211_frame *);
 927         struct mbuf *mcopy;
 928         struct ieee80211_meshcntl *mccopy;
 929         struct ieee80211_frame *whcopy;
 930         struct ieee80211_node *ni;
 931         int err;
 932
 933         /*
 934          * mesh ttl of 1 means we are the last one receving it,
 935          * according to amendment we decrement and then check if
 936          * 0, if so we dont forward.
 937          */
 938         if (mc->mc_ttl < 1) {
 939                 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
 940                     "%s", "frame not fwd'd, ttl 1");
 941                 vap->iv_stats.is_mesh_fwd_ttl++;
 942                 return;
 943         }
 944         if (!(ms->ms_flags & IEEE80211_MESHFLAGS_FWD)) {
 945                 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
 946                     "%s", "frame not fwd'd, fwding disabled");
 947                 vap->iv_stats.is_mesh_fwd_disabled++;
 948                 return;
 949         }
 950         mcopy = m_dup(m, M_DONTWAIT);
 951         if (mcopy == NULL) {
 952                 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
 953                     "%s", "frame not fwd'd, cannot dup");
 954                 vap->iv_stats.is_mesh_fwd_nobuf++;
 955                 ifp->if_oerrors++;
 956                 return;
 957         }
 958         mcopy = m_pullup(mcopy, ieee80211_hdrspace(ic, wh) +
 959             sizeof(struct ieee80211_meshcntl));
 960         if (mcopy == NULL) {
 961                 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
 962                     "%s", "frame not fwd'd, too short");
 963                 vap->iv_stats.is_mesh_fwd_tooshort++;
 964                 ifp->if_oerrors++;
 965                 m_freem(mcopy);
 966                 return;
 967         }
 968         whcopy = mtod(mcopy, struct ieee80211_frame *);
 969         mccopy = (struct ieee80211_meshcntl *)
 970             (mtod(mcopy, uint8_t *) + ieee80211_hdrspace(ic, wh));
 971         /* XXX clear other bits? */
 972         whcopy->i_fc[1] &= ~IEEE80211_FC1_RETRY;
 973         IEEE80211_ADDR_COPY(whcopy->i_addr2, vap->iv_myaddr);
 974         if (IEEE80211_IS_MULTICAST(wh->i_addr1)) {
 975                 ni = ieee80211_ref_node(vap->iv_bss);
 976                 mcopy->m_flags |= M_MCAST;
 977         } else {
 978                 ni = mesh_find_txnode(vap, whcopy->i_addr3);
 979                 if (ni == NULL) {
 980                         /*
 981                          * [Optional] any of the following three actions:
 982                          * o silently discard
 983                          * o trigger a path discovery
 984                          * o inform TA that meshDA is unknown.
 985                          */
 986                         IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
 987                             "%s", "frame not fwd'd, no path");
 988                         ms->ms_ppath->mpp_senderror(vap, whcopy->i_addr3, NULL,
 989                             IEEE80211_REASON_MESH_PERR_NO_FI);
 990                         vap->iv_stats.is_mesh_fwd_nopath++;
 991                         m_freem(mcopy);
 992                         return;
 993                 }
 994                 IEEE80211_ADDR_COPY(whcopy->i_addr1, ni->ni_macaddr);
 995         }
 996         KASSERT(mccopy->mc_ttl > 0, ("%s called with wrong ttl", __func__));
 997         mccopy->mc_ttl--;
 998
 999         /* XXX calculate priority so drivers can find the tx queue */
1000         M_WME_SETAC(mcopy, WME_AC_BE);
1001
1002         /* XXX do we know m_nextpkt is NULL? */
1003         mcopy->m_pkthdr.rcvif = (void *) ni;
1004         err = parent->if_transmit(parent, mcopy);
1005         if (err != 0) {
1006                 /* NB: IFQ_HANDOFF reclaims mbuf */
1007                 ieee80211_free_node(ni);
1008         } else {
1009                 ifp->if_opackets++;
1010         }
1011 }
1012
1013 static struct mbuf *
1014 mesh_decap(struct ieee80211vap *vap, struct mbuf *m, int hdrlen, int meshdrlen)
1015 {
1016 #define WHDIR(wh)       ((wh)->i_fc[1] & IEEE80211_FC1_DIR_MASK)
1017 #define MC01(mc)        ((const struct ieee80211_meshcntl_ae01 *)mc)
1018         uint8_t b[sizeof(struct ieee80211_qosframe_addr4) +
1019                   sizeof(struct ieee80211_meshcntl_ae10)];
1020         const struct ieee80211_qosframe_addr4 *wh;
1021         const struct ieee80211_meshcntl_ae10 *mc;
1022         struct ether_header *eh;
1023         struct llc *llc;
1024         int ae;
1025
1026         if (m->m_len < hdrlen + sizeof(*llc) &&
1027             (m = m_pullup(m, hdrlen + sizeof(*llc))) == NULL) {
1028                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ANY,
1029                     "discard data frame: %s", "m_pullup failed");
1030                 vap->iv_stats.is_rx_tooshort++;
1031                 return NULL;
1032         }
1033         memcpy(b, mtod(m, caddr_t), hdrlen);
1034         wh = (const struct ieee80211_qosframe_addr4 *)&b[0];
1035         mc = (const struct ieee80211_meshcntl_ae10 *)&b[hdrlen - meshdrlen];
1036         KASSERT(WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS ||
1037                 WHDIR(wh) == IEEE80211_FC1_DIR_DSTODS,
1038             ("bogus dir, fc 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1]));
1039
1040         llc = (struct llc *)(mtod(m, caddr_t) + hdrlen);
1041         if (llc->llc_dsap == LLC_SNAP_LSAP && llc->llc_ssap == LLC_SNAP_LSAP &&
1042             llc->llc_control == LLC_UI && llc->llc_snap.org_code[0] == 0 &&
1043             llc->llc_snap.org_code[1] == 0 && llc->llc_snap.org_code[2] == 0 &&
1044             /* NB: preserve AppleTalk frames that have a native SNAP hdr */
1045             !(llc->llc_snap.ether_type == htons(ETHERTYPE_AARP) ||
1046               llc->llc_snap.ether_type == htons(ETHERTYPE_IPX))) {
1047                 m_adj(m, hdrlen + sizeof(struct llc) - sizeof(*eh));
1048                 llc = NULL;
1049         } else {
1050                 m_adj(m, hdrlen - sizeof(*eh));
1051         }
1052         eh = mtod(m, struct ether_header *);
1053         ae = mc->mc_flags & IEEE80211_MESH_AE_MASK;
1054         if (WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS) {
1055                 IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr1);
1056                 if (ae == IEEE80211_MESH_AE_00) {
1057                         IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr3);
1058                 } else if (ae == IEEE80211_MESH_AE_01) {
1059                         IEEE80211_ADDR_COPY(eh->ether_shost,
1060                             MC01(mc)->mc_addr4);
1061                 } else {
1062                         IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1063                             (const struct ieee80211_frame *)wh, NULL,
1064                             "bad AE %d", ae);
1065                         vap->iv_stats.is_mesh_badae++;
1066                         m_freem(m);
1067                         return NULL;
1068                 }
1069         } else {
1070                 if (ae == IEEE80211_MESH_AE_00) {
1071                         IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr3);
1072                         IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr4);
1073                 } else if (ae == IEEE80211_MESH_AE_10) {
1074                         IEEE80211_ADDR_COPY(eh->ether_dhost, mc->mc_addr5);
1075                         IEEE80211_ADDR_COPY(eh->ether_shost, mc->mc_addr6);
1076                 } else {
1077                         IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1078                             (const struct ieee80211_frame *)wh, NULL,
1079                             "bad AE %d", ae);
1080                         vap->iv_stats.is_mesh_badae++;
1081                         m_freem(m);
1082                         return NULL;
1083                 }
1084         }
1085 #ifdef ALIGNED_POINTER
1086         if (!ALIGNED_POINTER(mtod(m, caddr_t) + sizeof(*eh), uint32_t)) {
1087                 m = ieee80211_realign(vap, m, sizeof(*eh));
1088                 if (m == NULL)
1089                         return NULL;
1090         }
1091 #endif /* ALIGNED_POINTER */
1092         if (llc != NULL) {
1093                 eh = mtod(m, struct ether_header *);
1094                 eh->ether_type = htons(m->m_pkthdr.len - sizeof(*eh));
1095         }
1096         return m;
1097 #undef  WDIR
1098 #undef  MC01
1099 }
1100
1101 /*
1102  * Return non-zero if the unicast mesh data frame should be processed
1103  * locally.  Frames that are not proxy'd have our address, otherwise
1104  * we need to consult the routing table to look for a proxy entry.
1105  */
1106 static __inline int
1107 mesh_isucastforme(struct ieee80211vap *vap, const struct ieee80211_frame *wh,
1108     const struct ieee80211_meshcntl *mc)
1109 {
1110         int ae = mc->mc_flags & 3;
1111
1112         KASSERT((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) == IEEE80211_FC1_DIR_DSTODS,
1113             ("bad dir 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1]));
1114         KASSERT(ae == IEEE80211_MESH_AE_00 || ae == IEEE80211_MESH_AE_10,
1115             ("bad AE %d", ae));
1116         if (ae == IEEE80211_MESH_AE_10) {       /* ucast w/ proxy */
1117                 const struct ieee80211_meshcntl_ae10 *mc10 =
1118                     (const struct ieee80211_meshcntl_ae10 *) mc;
1119                 struct ieee80211_mesh_route *rt =
1120                     ieee80211_mesh_rt_find(vap, mc10->mc_addr5);
1121                 /* check for proxy route to ourself */
1122                 return (rt != NULL &&
1123                     (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY));
1124         } else                                  /* ucast w/o proxy */
1125                 return IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_myaddr);
1126 }
1127
1128 /*
1129  * Verifies transmitter, updates lifetime, precursor list and forwards data.
1130  * > 0 means we have forwarded data and no need to process locally
1131  * == 0 means we want to process locally (and we may have forwarded data
1132  * < 0 means there was an error and data should be discarded
1133  */
1134 static int
1135 mesh_recv_indiv_data_to_fwrd(struct ieee80211vap *vap, struct mbuf *m,
1136     struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc)
1137 {
1138         struct ieee80211_qosframe_addr4 *qwh;
1139         struct ieee80211_mesh_state *ms = vap->iv_mesh;
1140         struct ieee80211_mesh_route *rt_meshda, *rt_meshsa;
1141
1142         qwh = (struct ieee80211_qosframe_addr4 *)wh;
1143
1144         /*
1145          * TODO:
1146          * o verify addr2 is  a legitimate transmitter
1147          * o lifetime of precursor of addr3 (addr2) is max(init, curr)
1148          * o lifetime of precursor of addr4 (nexthop) is max(init, curr)
1149          */
1150
1151         /* set lifetime of addr3 (meshDA) to initial value */
1152         rt_meshda = ieee80211_mesh_rt_find(vap, qwh->i_addr3);
1153         if (rt_meshda == NULL) {
1154                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, qwh->i_addr2,
1155                     "no route to meshDA(%6D)", qwh->i_addr3, ":");
1156                 /*
1157                  * [Optional] any of the following three actions:
1158                  * o silently discard                           [X]
1159                  * o trigger a path discovery                   [ ]
1160                  * o inform TA that meshDA is unknown.          [ ]
1161                  */
1162                 /* XXX: stats */
1163                 return (-1);
1164         }
1165
1166         ieee80211_mesh_rt_update(rt_meshda, ticks_to_msecs(
1167             ms->ms_ppath->mpp_inact));
1168
1169         /* set lifetime of addr4 (meshSA) to initial value */
1170         rt_meshsa = ieee80211_mesh_rt_find(vap, qwh->i_addr4);
1171         KASSERT(rt_meshsa != NULL, ("no route"));
1172         ieee80211_mesh_rt_update(rt_meshsa, ticks_to_msecs(
1173             ms->ms_ppath->mpp_inact));
1174
1175         mesh_forward(vap, m, mc);
1176         return (1); /* dont process locally */
1177 }
1178
1179 /*
1180  * Verifies transmitter, updates lifetime, precursor list and process data
1181  * locally, if data is is proxy with AE = 10 it could mean data should go
1182  * on another mesh path or data should be forwarded to the DS.
1183  *
1184  * > 0 means we have forwarded data and no need to process locally
1185  * == 0 means we want to process locally (and we may have forwarded data
1186  * < 0 means there was an error and data should be discarded
1187  */
1188 static int
1189 mesh_recv_indiv_data_to_me(struct ieee80211vap *vap, struct mbuf *m,
1190     struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc)
1191 {
1192         struct ieee80211_qosframe_addr4 *qwh;
1193         const struct ieee80211_meshcntl_ae10 *mc10;
1194         struct ieee80211_mesh_state *ms = vap->iv_mesh;
1195         struct ieee80211_mesh_route *rt;
1196         int ae;
1197
1198         qwh = (struct ieee80211_qosframe_addr4 *)wh;
1199         mc10 = (const struct ieee80211_meshcntl_ae10 *)mc;
1200
1201         /*
1202          * TODO:
1203          * o verify addr2 is  a legitimate transmitter
1204          * o lifetime of precursor entry is max(init, curr)
1205          */
1206
1207         /* set lifetime of addr4 (meshSA) to initial value */
1208         rt = ieee80211_mesh_rt_find(vap, qwh->i_addr4);
1209         KASSERT(rt != NULL, ("no route"));
1210         ieee80211_mesh_rt_update(rt, ticks_to_msecs(ms->ms_ppath->mpp_inact));
1211         rt = NULL;
1212
1213         ae = mc10->mc_flags & IEEE80211_MESH_AE_MASK;
1214         KASSERT(ae == IEEE80211_MESH_AE_00 ||
1215             ae == IEEE80211_MESH_AE_10, ("bad AE %d", ae));
1216         if (ae == IEEE80211_MESH_AE_10) {
1217                 if (IEEE80211_ADDR_EQ(mc10->mc_addr5, qwh->i_addr3)) {
1218                         return (0); /* process locally */
1219                 }
1220
1221                 rt =  ieee80211_mesh_rt_find(vap, mc10->mc_addr5);
1222                 if (rt != NULL &&
1223                     (rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) &&
1224                     (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) == 0) {
1225                         /*
1226                          * Forward on another mesh-path, according to
1227                          * amendment as specified in 9.32.4.1
1228                          */
1229                         IEEE80211_ADDR_COPY(qwh->i_addr3, mc10->mc_addr5);
1230                         mesh_forward(vap, m,
1231                             (const struct ieee80211_meshcntl *)mc10);
1232                         return (1); /* dont process locally */
1233                 }
1234                 /*
1235                  * All other cases: forward of MSDUs from the MBSS to DS indiv.
1236                  * addressed according to 13.11.3.2.
1237                  */
1238         }
1239         return (0); /* process locally */
1240 }
1241
1242 /*
1243  * Try to forward the group addressed data on to other mesh STAs, and
1244  * also to the DS.
1245  *
1246  * > 0 means we have forwarded data and no need to process locally
1247  * == 0 means we want to process locally (and we may have forwarded data
1248  * < 0 means there was an error and data should be discarded
1249  */
1250 static int
1251 mesh_recv_group_data(struct ieee80211vap *vap, struct mbuf *m,
1252     struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc)
1253 {
1254 #define MC01(mc)        ((const struct ieee80211_meshcntl_ae01 *)mc)
1255         struct ieee80211_mesh_state *ms = vap->iv_mesh;
1256
1257         mesh_forward(vap, m, mc);
1258
1259         if(mc->mc_ttl > 0) {
1260                 if (mc->mc_flags & IEEE80211_MESH_AE_01) {
1261                         /*
1262                          * Forward of MSDUs from the MBSS to DS group addressed
1263                          * (according to 13.11.3.2)
1264                          * This happens by delivering the packet, and a bridge
1265                          * will sent it on another port member.
1266                          */
1267                         if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE &&
1268                             ms->ms_flags & IEEE80211_MESHFLAGS_FWD)
1269                                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH,
1270                                     MC01(mc)->mc_addr4, "%s",
1271                                     "forward from MBSS to the DS");
1272                 }
1273         }
1274         return (0); /* process locally */
1275 #undef  MC01
1276 }
1277
1278 static int
1279 mesh_input(struct ieee80211_node *ni, struct mbuf *m, int rssi, int nf)
1280 {
1281 #define HAS_SEQ(type)   ((type & 0x4) == 0)
1282 #define MC01(mc)        ((const struct ieee80211_meshcntl_ae01 *)mc)
1283 #define MC10(mc)        ((const struct ieee80211_meshcntl_ae10 *)mc)
1284         struct ieee80211vap *vap = ni->ni_vap;
1285         struct ieee80211com *ic = ni->ni_ic;
1286         struct ifnet *ifp = vap->iv_ifp;
1287         struct ieee80211_frame *wh;
1288         const struct ieee80211_meshcntl *mc;
1289         int hdrspace, meshdrlen, need_tap, error;
1290         uint8_t dir, type, subtype, ae;
1291         uint32_t seq;
1292         const uint8_t *addr;
1293         uint8_t qos[2];
1294         ieee80211_seq rxseq;
1295
1296         KASSERT(ni != NULL, ("null node"));
1297         ni->ni_inact = ni->ni_inact_reload;
1298
1299         need_tap = 1;                   /* mbuf need to be tapped. */
1300         type = -1;                      /* undefined */
1301
1302         if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) {
1303                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1304                     ni->ni_macaddr, NULL,
1305                     "too short (1): len %u", m->m_pkthdr.len);
1306                 vap->iv_stats.is_rx_tooshort++;
1307                 goto out;
1308         }
1309         /*
1310          * Bit of a cheat here, we use a pointer for a 3-address
1311          * frame format but don't reference fields past outside
1312          * ieee80211_frame_min w/o first validating the data is
1313          * present.
1314         */
1315         wh = mtod(m, struct ieee80211_frame *);
1316
1317         if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) !=
1318             IEEE80211_FC0_VERSION_0) {
1319                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1320                     ni->ni_macaddr, NULL, "wrong version %x", wh->i_fc[0]);
1321                 vap->iv_stats.is_rx_badversion++;
1322                 goto err;
1323         }
1324         dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK;
1325         type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK;
1326         subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK;
1327         if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) {
1328                 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi);
1329                 ni->ni_noise = nf;
1330                 if (HAS_SEQ(type)) {
1331                         uint8_t tid = ieee80211_gettid(wh);
1332
1333                         if (IEEE80211_QOS_HAS_SEQ(wh) &&
1334                             TID_TO_WME_AC(tid) >= WME_AC_VI)
1335                                 ic->ic_wme.wme_hipri_traffic++;
1336                         rxseq = le16toh(*(uint16_t *)wh->i_seq);
1337                         if (! ieee80211_check_rxseq(ni, wh)) {
1338                                 /* duplicate, discard */
1339                                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
1340                                     wh->i_addr1, "duplicate",
1341                                     "seqno <%u,%u> fragno <%u,%u> tid %u",
1342                                     rxseq >> IEEE80211_SEQ_SEQ_SHIFT,
1343                                     ni->ni_rxseqs[tid] >>
1344                                     IEEE80211_SEQ_SEQ_SHIFT,
1345                                     rxseq & IEEE80211_SEQ_FRAG_MASK,
1346                                     ni->ni_rxseqs[tid] &
1347                                     IEEE80211_SEQ_FRAG_MASK,
1348                                     tid);
1349                                 vap->iv_stats.is_rx_dup++;
1350                                 IEEE80211_NODE_STAT(ni, rx_dup);
1351                                 goto out;
1352                         }
1353                         ni->ni_rxseqs[tid] = rxseq;
1354                 }
1355         }
1356 #ifdef IEEE80211_DEBUG
1357         /*
1358          * It's easier, but too expensive, to simulate different mesh
1359          * topologies by consulting the ACL policy very early, so do this
1360          * only under DEBUG.
1361          *
1362          * NB: this check is also done upon peering link initiation.
1363          */
1364         if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) {
1365                 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL,
1366                     wh, NULL, "%s", "disallowed by ACL");
1367                 vap->iv_stats.is_rx_acl++;
1368                 goto out;
1369         }
1370 #endif
1371         switch (type) {
1372         case IEEE80211_FC0_TYPE_DATA:
1373                 if (ni == vap->iv_bss)
1374                         goto out;
1375                 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) {
1376                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
1377                             ni->ni_macaddr, NULL,
1378                             "peer link not yet established (%d)",
1379                             ni->ni_mlstate);
1380                         vap->iv_stats.is_mesh_nolink++;
1381                         goto out;
1382                 }
1383                 if (dir != IEEE80211_FC1_DIR_FROMDS &&
1384                     dir != IEEE80211_FC1_DIR_DSTODS) {
1385                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1386                             wh, "data", "incorrect dir 0x%x", dir);
1387                         vap->iv_stats.is_rx_wrongdir++;
1388                         goto err;
1389                 }
1390
1391                 /* All Mesh data frames are QoS subtype */
1392                 if (!HAS_SEQ(type)) {
1393                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1394                             wh, "data", "incorrect subtype 0x%x", subtype);
1395                         vap->iv_stats.is_rx_badsubtype++;
1396                         goto err;
1397                 }
1398
1399                 /*
1400                  * Next up, any fragmentation.
1401                  * XXX: we defrag before we even try to forward,
1402                  * Mesh Control field is not present in sub-sequent
1403                  * fragmented frames. This is in contrast to Draft 4.0.
1404                  */
1405                 hdrspace = ieee80211_hdrspace(ic, wh);
1406                 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1407                         m = ieee80211_defrag(ni, m, hdrspace);
1408                         if (m == NULL) {
1409                                 /* Fragment dropped or frame not complete yet */
1410                                 goto out;
1411                         }
1412                 }
1413                 wh = mtod(m, struct ieee80211_frame *); /* NB: after defrag */
1414
1415                 /*
1416                  * Now we have a complete Mesh Data frame.
1417                  */
1418
1419                 /*
1420                  * Only fromDStoDS data frames use 4 address qos frames
1421                  * as specified in amendment. Otherwise addr4 is located
1422                  * in the Mesh Control field and a 3 address qos frame
1423                  * is used.
1424                  */
1425                 if (IEEE80211_IS_DSTODS(wh))
1426                         *(uint16_t *)qos = *(uint16_t *)
1427                             ((struct ieee80211_qosframe_addr4 *)wh)->i_qos;
1428                 else
1429                         *(uint16_t *)qos = *(uint16_t *)
1430                             ((struct ieee80211_qosframe *)wh)->i_qos;
1431
1432                 /*
1433                  * NB: The mesh STA sets the Mesh Control Present
1434                  * subfield to 1 in the Mesh Data frame containing
1435                  * an unfragmented MSDU, an A-MSDU, or the first
1436                  * fragment of an MSDU.
1437                  * After defrag it should always be present.
1438                  */
1439                 if (!(qos[1] & IEEE80211_QOS_MC)) {
1440                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
1441                             ni->ni_macaddr, NULL,
1442                             "%s", "Mesh control field not present");
1443                         vap->iv_stats.is_rx_elem_missing++; /* XXX: kinda */
1444                         goto err;
1445                 }
1446
1447                 /* pull up enough to get to the mesh control */
1448                 if (m->m_len < hdrspace + sizeof(struct ieee80211_meshcntl) &&
1449                     (m = m_pullup(m, hdrspace +
1450                         sizeof(struct ieee80211_meshcntl))) == NULL) {
1451                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1452                             ni->ni_macaddr, NULL,
1453                             "data too short: expecting %u", hdrspace);
1454                         vap->iv_stats.is_rx_tooshort++;
1455                         goto out;               /* XXX */
1456                 }
1457                 /*
1458                  * Now calculate the full extent of the headers. Note
1459                  * mesh_decap will pull up anything we didn't get
1460                  * above when it strips the 802.11 headers.
1461                  */
1462                 mc = (const struct ieee80211_meshcntl *)
1463                     (mtod(m, const uint8_t *) + hdrspace);
1464                 ae = mc->mc_flags & IEEE80211_MESH_AE_MASK;
1465                 meshdrlen = sizeof(struct ieee80211_meshcntl) +
1466                     ae * IEEE80211_ADDR_LEN;
1467                 hdrspace += meshdrlen;
1468
1469                 /* pull complete hdrspace = ieee80211_hdrspace + meshcontrol */
1470                 if ((meshdrlen > sizeof(struct ieee80211_meshcntl)) &&
1471                     (m->m_len < hdrspace) &&
1472                     ((m = m_pullup(m, hdrspace)) == NULL)) {
1473                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1474                             ni->ni_macaddr, NULL,
1475                             "data too short: expecting %u", hdrspace);
1476                         vap->iv_stats.is_rx_tooshort++;
1477                         goto out;               /* XXX */
1478                 }
1479                 /* XXX: are we sure there is no reallocating after m_pullup? */
1480
1481                 seq = LE_READ_4(mc->mc_seq);
1482                 if (IEEE80211_IS_MULTICAST(wh->i_addr1))
1483                         addr = wh->i_addr3;
1484                 else if (ae == IEEE80211_MESH_AE_01)
1485                         addr = MC01(mc)->mc_addr4;
1486                 else
1487                         addr = ((struct ieee80211_qosframe_addr4 *)wh)->i_addr4;
1488                 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, addr)) {
1489                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
1490                             addr, "data", "%s", "not to me");
1491                         vap->iv_stats.is_rx_wrongbss++; /* XXX kinda */
1492                         goto out;
1493                 }
1494                 if (mesh_checkpseq(vap, addr, seq) != 0) {
1495                         vap->iv_stats.is_rx_dup++;
1496                         goto out;
1497                 }
1498
1499                 /* This code "routes" the frame to the right control path */
1500                 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1501                         if (IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr3))
1502                                 error =
1503                                     mesh_recv_indiv_data_to_me(vap, m, wh, mc);
1504                         else if (IEEE80211_IS_MULTICAST(wh->i_addr3))
1505                                 error = mesh_recv_group_data(vap, m, wh, mc);
1506                         else
1507                                 error = mesh_recv_indiv_data_to_fwrd(vap, m,
1508                                     wh, mc);
1509                 } else
1510                         error = mesh_recv_group_data(vap, m, wh, mc);
1511                 if (error < 0)
1512                         goto err;
1513                 else if (error > 0)
1514                         goto out;
1515
1516                 if (ieee80211_radiotap_active_vap(vap))
1517                         ieee80211_radiotap_rx(vap, m);
1518                 need_tap = 0;
1519
1520                 /*
1521                  * Finally, strip the 802.11 header.
1522                  */
1523                 m = mesh_decap(vap, m, hdrspace, meshdrlen);
1524                 if (m == NULL) {
1525                         /* XXX mask bit to check for both */
1526                         /* don't count Null data frames as errors */
1527                         if (subtype == IEEE80211_FC0_SUBTYPE_NODATA ||
1528                             subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL)
1529                                 goto out;
1530                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
1531                             ni->ni_macaddr, "data", "%s", "decap error");
1532                         vap->iv_stats.is_rx_decap++;
1533                         IEEE80211_NODE_STAT(ni, rx_decap);
1534                         goto err;
1535                 }
1536                 if (qos[0] & IEEE80211_QOS_AMSDU) {
1537                         m = ieee80211_decap_amsdu(ni, m);
1538                         if (m == NULL)
1539                                 return IEEE80211_FC0_TYPE_DATA;
1540                 }
1541                 ieee80211_deliver_data(vap, ni, m);
1542                 return type;
1543         case IEEE80211_FC0_TYPE_MGT:
1544                 vap->iv_stats.is_rx_mgmt++;
1545                 IEEE80211_NODE_STAT(ni, rx_mgmt);
1546                 if (dir != IEEE80211_FC1_DIR_NODS) {
1547                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1548                             wh, "mgt", "incorrect dir 0x%x", dir);
1549                         vap->iv_stats.is_rx_wrongdir++;
1550                         goto err;
1551                 }
1552                 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) {
1553                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1554                             ni->ni_macaddr, "mgt", "too short: len %u",
1555                             m->m_pkthdr.len);
1556                         vap->iv_stats.is_rx_tooshort++;
1557                         goto out;
1558                 }
1559 #ifdef IEEE80211_DEBUG
1560                 if ((ieee80211_msg_debug(vap) &&
1561                     (vap->iv_ic->ic_flags & IEEE80211_F_SCAN)) ||
1562                     ieee80211_msg_dumppkts(vap)) {
1563                         if_printf(ifp, "received %s from %s rssi %d\n",
1564                             ieee80211_mgt_subtype_name[subtype >>
1565                             IEEE80211_FC0_SUBTYPE_SHIFT],
1566                             ether_sprintf(wh->i_addr2), rssi);
1567                 }
1568 #endif
1569                 if (wh->i_fc[1] & IEEE80211_FC1_WEP) {
1570                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1571                             wh, NULL, "%s", "WEP set but not permitted");
1572                         vap->iv_stats.is_rx_mgtdiscard++; /* XXX */
1573                         goto out;
1574                 }
1575                 vap->iv_recv_mgmt(ni, m, subtype, rssi, nf);
1576                 goto out;
1577         case IEEE80211_FC0_TYPE_CTL:
1578                 vap->iv_stats.is_rx_ctl++;
1579                 IEEE80211_NODE_STAT(ni, rx_ctrl);
1580                 goto out;
1581         default:
1582                 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1583                     wh, "bad", "frame type 0x%x", type);
1584                 /* should not come here */
1585                 break;
1586         }
1587 err:
1588         ifp->if_ierrors++;
1589 out:
1590         if (m != NULL) {
1591                 if (need_tap && ieee80211_radiotap_active_vap(vap))
1592                         ieee80211_radiotap_rx(vap, m);
1593                 m_freem(m);
1594         }
1595         return type;
1596 #undef  HAS_SEQ
1597 #undef  MC01
1598 #undef  MC10
1599 }
1600
1601 static void
1602 mesh_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, int subtype,
1603     int rssi, int nf)
1604 {
1605         struct ieee80211vap *vap = ni->ni_vap;
1606         struct ieee80211_mesh_state *ms = vap->iv_mesh;
1607         struct ieee80211com *ic = ni->ni_ic;
1608         struct ieee80211_frame *wh;
1609         struct ieee80211_mesh_route *rt;
1610         uint8_t *frm, *efrm;
1611
1612         wh = mtod(m0, struct ieee80211_frame *);
1613         frm = (uint8_t *)&wh[1];
1614         efrm = mtod(m0, uint8_t *) + m0->m_len;
1615         switch (subtype) {
1616         case IEEE80211_FC0_SUBTYPE_PROBE_RESP:
1617         case IEEE80211_FC0_SUBTYPE_BEACON:
1618         {
1619                 struct ieee80211_scanparams scan;
1620                 /*
1621                  * We process beacon/probe response
1622                  * frames to discover neighbors.
1623                  */
1624                 if (ieee80211_parse_beacon(ni, m0, &scan) != 0)
1625                         return;
1626                 /*
1627                  * Count frame now that we know it's to be processed.
1628                  */
1629                 if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) {
1630                         vap->iv_stats.is_rx_beacon++;   /* XXX remove */
1631                         IEEE80211_NODE_STAT(ni, rx_beacons);
1632                 } else
1633                         IEEE80211_NODE_STAT(ni, rx_proberesp);
1634                 /*
1635                  * If scanning, just pass information to the scan module.
1636                  */
1637                 if (ic->ic_flags & IEEE80211_F_SCAN) {
1638                         if (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN) {
1639                                 /*
1640                                  * Actively scanning a channel marked passive;
1641                                  * send a probe request now that we know there
1642                                  * is 802.11 traffic present.
1643                                  *
1644                                  * XXX check if the beacon we recv'd gives
1645                                  * us what we need and suppress the probe req
1646                                  */
1647                                 ieee80211_probe_curchan(vap, 1);
1648                                 ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN;
1649                         }
1650                         ieee80211_add_scan(vap, &scan, wh,
1651                             subtype, rssi, nf);
1652                         return;
1653                 }
1654
1655                 /* The rest of this code assumes we are running */
1656                 if (vap->iv_state != IEEE80211_S_RUN)
1657                         return;
1658                 /*
1659                  * Ignore non-mesh STAs.
1660                  */
1661                 if ((scan.capinfo &
1662                      (IEEE80211_CAPINFO_ESS|IEEE80211_CAPINFO_IBSS)) ||
1663                     scan.meshid == NULL || scan.meshconf == NULL) {
1664                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1665                             wh, "beacon", "%s", "not a mesh sta");
1666                         vap->iv_stats.is_mesh_wrongmesh++;
1667                         return;
1668                 }
1669                 /*
1670                  * Ignore STAs for other mesh networks.
1671                  */
1672                 if (memcmp(scan.meshid+2, ms->ms_id, ms->ms_idlen) != 0 ||
1673                     mesh_verify_meshconf(vap, scan.meshconf)) {
1674                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1675                             wh, "beacon", "%s", "not for our mesh");
1676                         vap->iv_stats.is_mesh_wrongmesh++;
1677                         return;
1678                 }
1679                 /*
1680                  * Peer only based on the current ACL policy.
1681                  */
1682                 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) {
1683                         IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL,
1684                             wh, NULL, "%s", "disallowed by ACL");
1685                         vap->iv_stats.is_rx_acl++;
1686                         return;
1687                 }
1688                 /*
1689                  * Do neighbor discovery.
1690                  */
1691                 if (!IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_macaddr)) {
1692                         /*
1693                          * Create a new entry in the neighbor table.
1694                          */
1695                         ni = ieee80211_add_neighbor(vap, wh, &scan);
1696                 }
1697                 /*
1698                  * Automatically peer with discovered nodes if possible.
1699                  * XXX backoff on repeated failure
1700                  */
1701                 if (ni != vap->iv_bss &&
1702                     (ms->ms_flags & IEEE80211_MESHFLAGS_AP)) {
1703                         switch (ni->ni_mlstate) {
1704                         case IEEE80211_NODE_MESH_IDLE:
1705                         {
1706                                 uint16_t args[1];
1707
1708                                 ni->ni_mlpid = mesh_generateid(vap);
1709                                 if (ni->ni_mlpid == 0)
1710                                         return;
1711                                 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENSNT);
1712                                 args[0] = ni->ni_mlpid;
1713                                 ieee80211_send_action(ni,
1714                                 IEEE80211_ACTION_CAT_SELF_PROT,
1715                                 IEEE80211_ACTION_MESHPEERING_OPEN, args);
1716                                 ni->ni_mlrcnt = 0;
1717                                 mesh_peer_timeout_setup(ni);
1718                                 break;
1719                         }
1720                         case IEEE80211_NODE_MESH_ESTABLISHED:
1721                         {
1722                                 /*
1723                                  * Valid beacon from a peer mesh STA
1724                                  * bump TA lifetime
1725                                  */
1726                                 rt = ieee80211_mesh_rt_find(vap, wh->i_addr2);
1727                                 if(rt != NULL) {
1728                                         ieee80211_mesh_rt_update(rt,
1729                                             ticks_to_msecs(
1730                                             ms->ms_ppath->mpp_inact));
1731                                 }
1732                                 break;
1733                         }
1734                         default:
1735                                 break; /* ignore */
1736                         }
1737                 }
1738                 break;
1739         }
1740         case IEEE80211_FC0_SUBTYPE_PROBE_REQ:
1741         {
1742                 uint8_t *ssid, *meshid, *rates, *xrates;
1743                 uint8_t *sfrm;
1744
1745                 if (vap->iv_state != IEEE80211_S_RUN) {
1746                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1747                             wh, NULL, "wrong state %s",
1748                             ieee80211_state_name[vap->iv_state]);
1749                         vap->iv_stats.is_rx_mgtdiscard++;
1750                         return;
1751                 }
1752                 if (IEEE80211_IS_MULTICAST(wh->i_addr2)) {
1753                         /* frame must be directed */
1754                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1755                             wh, NULL, "%s", "not unicast");
1756                         vap->iv_stats.is_rx_mgtdiscard++;       /* XXX stat */
1757                         return;
1758                 }
1759                 /*
1760                  * prreq frame format
1761                  *      [tlv] ssid
1762                  *      [tlv] supported rates
1763                  *      [tlv] extended supported rates
1764                  *      [tlv] mesh id
1765                  */
1766                 ssid = meshid = rates = xrates = NULL;
1767                 sfrm = frm;
1768                 while (efrm - frm > 1) {
1769                         IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return);
1770                         switch (*frm) {
1771                         case IEEE80211_ELEMID_SSID:
1772                                 ssid = frm;
1773                                 break;
1774                         case IEEE80211_ELEMID_RATES:
1775                                 rates = frm;
1776                                 break;
1777                         case IEEE80211_ELEMID_XRATES:
1778                                 xrates = frm;
1779                                 break;
1780                         case IEEE80211_ELEMID_MESHID:
1781                                 meshid = frm;
1782                                 break;
1783                         }
1784                         frm += frm[1] + 2;
1785                 }
1786                 IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return);
1787                 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return);
1788                 if (xrates != NULL)
1789                         IEEE80211_VERIFY_ELEMENT(xrates,
1790                             IEEE80211_RATE_MAXSIZE - rates[1], return);
1791                 if (meshid != NULL) {
1792                         IEEE80211_VERIFY_ELEMENT(meshid,
1793                             IEEE80211_MESHID_LEN, return);
1794                         /* NB: meshid, not ssid */
1795                         IEEE80211_VERIFY_SSID(vap->iv_bss, meshid, return);
1796                 }
1797
1798                 /* XXX find a better class or define it's own */
1799                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_INPUT, wh->i_addr2,
1800                     "%s", "recv probe req");
1801                 /*
1802                  * Some legacy 11b clients cannot hack a complete
1803                  * probe response frame.  When the request includes
1804                  * only a bare-bones rate set, communicate this to
1805                  * the transmit side.
1806                  */
1807                 ieee80211_send_proberesp(vap, wh->i_addr2, 0);
1808                 break;
1809         }
1810
1811         case IEEE80211_FC0_SUBTYPE_ACTION:
1812         case IEEE80211_FC0_SUBTYPE_ACTION_NOACK:
1813                 if (ni == vap->iv_bss) {
1814                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1815                             wh, NULL, "%s", "unknown node");
1816                         vap->iv_stats.is_rx_mgtdiscard++;
1817                 } else if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) &&
1818                     !IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1819                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1820                             wh, NULL, "%s", "not for us");
1821                         vap->iv_stats.is_rx_mgtdiscard++;
1822                 } else if (vap->iv_state != IEEE80211_S_RUN) {
1823                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1824                             wh, NULL, "wrong state %s",
1825                             ieee80211_state_name[vap->iv_state]);
1826                         vap->iv_stats.is_rx_mgtdiscard++;
1827                 } else {
1828                         if (ieee80211_parse_action(ni, m0) == 0)
1829                                 (void)ic->ic_recv_action(ni, wh, frm, efrm);
1830                 }
1831                 break;
1832
1833         case IEEE80211_FC0_SUBTYPE_ASSOC_REQ:
1834         case IEEE80211_FC0_SUBTYPE_ASSOC_RESP:
1835         case IEEE80211_FC0_SUBTYPE_REASSOC_REQ:
1836         case IEEE80211_FC0_SUBTYPE_REASSOC_RESP:
1837         case IEEE80211_FC0_SUBTYPE_ATIM:
1838         case IEEE80211_FC0_SUBTYPE_DISASSOC:
1839         case IEEE80211_FC0_SUBTYPE_AUTH:
1840         case IEEE80211_FC0_SUBTYPE_DEAUTH:
1841                 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1842                     wh, NULL, "%s", "not handled");
1843                 vap->iv_stats.is_rx_mgtdiscard++;
1844                 break;
1845
1846         default:
1847                 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1848                     wh, "mgt", "subtype 0x%x not handled", subtype);
1849                 vap->iv_stats.is_rx_badsubtype++;
1850                 break;
1851         }
1852 }
1853
1854 static void
1855 mesh_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype)
1856 {
1857
1858         switch (subtype) {
1859         case IEEE80211_FC0_SUBTYPE_BAR:
1860                 ieee80211_recv_bar(ni, m);
1861                 break;
1862         }
1863 }
1864
1865 /*
1866  * Parse meshpeering action ie's for MPM frames
1867  */
1868 static const struct ieee80211_meshpeer_ie *
1869 mesh_parse_meshpeering_action(struct ieee80211_node *ni,
1870         const struct ieee80211_frame *wh,       /* XXX for VERIFY_LENGTH */
1871         const uint8_t *frm, const uint8_t *efrm,
1872         struct ieee80211_meshpeer_ie *mp, uint8_t subtype)
1873 {
1874         struct ieee80211vap *vap = ni->ni_vap;
1875         const struct ieee80211_meshpeer_ie *mpie;
1876         uint16_t args[3];
1877         const uint8_t *meshid, *meshconf, *meshpeer;
1878         uint8_t sendclose = 0; /* 1 = MPM frame rejected, close will be sent */
1879
1880         meshid = meshconf = meshpeer = NULL;
1881         while (efrm - frm > 1) {
1882                 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return NULL);
1883                 switch (*frm) {
1884                 case IEEE80211_ELEMID_MESHID:
1885                         meshid = frm;
1886                         break;
1887                 case IEEE80211_ELEMID_MESHCONF:
1888                         meshconf = frm;
1889                         break;
1890                 case IEEE80211_ELEMID_MESHPEER:
1891                         meshpeer = frm;
1892                         mpie = (const struct ieee80211_meshpeer_ie *) frm;
1893                         memset(mp, 0, sizeof(*mp));
1894                         mp->peer_len = mpie->peer_len;
1895                         mp->peer_proto = LE_READ_2(&mpie->peer_proto);
1896                         mp->peer_llinkid = LE_READ_2(&mpie->peer_llinkid);
1897                         switch (subtype) {
1898                         case IEEE80211_ACTION_MESHPEERING_CONFIRM:
1899                                 mp->peer_linkid =
1900                                     LE_READ_2(&mpie->peer_linkid);
1901                                 break;
1902                         case IEEE80211_ACTION_MESHPEERING_CLOSE:
1903                                 /* NB: peer link ID is optional */
1904                                 if (mpie->peer_len ==
1905                                     (IEEE80211_MPM_BASE_SZ + 2)) {
1906                                         mp->peer_linkid = 0;
1907                                         mp->peer_rcode =
1908                                             LE_READ_2(&mpie->peer_linkid);
1909                                 } else {
1910                                         mp->peer_linkid =
1911                                             LE_READ_2(&mpie->peer_linkid);
1912                                         mp->peer_rcode =
1913                                             LE_READ_2(&mpie->peer_rcode);
1914                                 }
1915                                 break;
1916                         }
1917                         break;
1918                 }
1919                 frm += frm[1] + 2;
1920         }
1921
1922         /*
1923          * Verify the contents of the frame.
1924          * If it fails validation, close the peer link.
1925          */
1926         if (mesh_verify_meshpeer(vap, subtype, (const uint8_t *)mp)) {
1927                 sendclose = 1;
1928                 IEEE80211_DISCARD(vap,
1929                     IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
1930                     wh, NULL, "%s", "MPM validation failed");
1931         }
1932
1933         /* If meshid is not the same reject any frames type. */
1934         if (sendclose == 0 && mesh_verify_meshid(vap, meshid)) {
1935                 sendclose = 1;
1936                 IEEE80211_DISCARD(vap,
1937                     IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
1938                     wh, NULL, "%s", "not for our mesh");
1939                 if (subtype == IEEE80211_ACTION_MESHPEERING_CLOSE) {
1940                         /*
1941                          * Standard not clear about this, if we dont ignore
1942                          * there will be an endless loop between nodes sending
1943                          * CLOSE frames between each other with wrong meshid.
1944                          * Discard and timers will bring FSM to IDLE state.
1945                          */
1946                         return NULL;
1947                 }
1948         }
1949
1950         /*
1951          * Close frames are accepted if meshid is the same.
1952          * Verify the other two types.
1953          */
1954         if (sendclose == 0 && subtype != IEEE80211_ACTION_MESHPEERING_CLOSE &&
1955             mesh_verify_meshconf(vap, meshconf)) {
1956                 sendclose = 1;
1957                 IEEE80211_DISCARD(vap,
1958                     IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
1959                     wh, NULL, "%s", "configuration missmatch");
1960         }
1961
1962         if (sendclose) {
1963                 vap->iv_stats.is_rx_mgtdiscard++;
1964                 switch (ni->ni_mlstate) {
1965                 case IEEE80211_NODE_MESH_IDLE:
1966                 case IEEE80211_NODE_MESH_ESTABLISHED:
1967                 case IEEE80211_NODE_MESH_HOLDING:
1968                         /* ignore */
1969                         break;
1970                 case IEEE80211_NODE_MESH_OPENSNT:
1971                 case IEEE80211_NODE_MESH_OPENRCV:
1972                 case IEEE80211_NODE_MESH_CONFIRMRCV:
1973                         args[0] = ni->ni_mlpid;
1974                         args[1] = ni->ni_mllid;
1975                         /* Reason codes for rejection */
1976                         switch (subtype) {
1977                         case IEEE80211_ACTION_MESHPEERING_OPEN:
1978                                 args[2] = IEEE80211_REASON_MESH_CPVIOLATION;
1979                                 break;
1980                         case IEEE80211_ACTION_MESHPEERING_CONFIRM:
1981                                 args[2] = IEEE80211_REASON_MESH_INCONS_PARAMS;
1982                                 break;
1983                         }
1984                         ieee80211_send_action(ni,
1985                             IEEE80211_ACTION_CAT_SELF_PROT,
1986                             IEEE80211_ACTION_MESHPEERING_CLOSE,
1987                             args);
1988                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
1989                         mesh_peer_timeout_setup(ni);
1990                         break;
1991                 }
1992                 return NULL;
1993         }
1994
1995         return (const struct ieee80211_meshpeer_ie *) mp;
1996 }
1997
1998 static int
1999 mesh_recv_action_meshpeering_open(struct ieee80211_node *ni,
2000         const struct ieee80211_frame *wh,
2001         const uint8_t *frm, const uint8_t *efrm)
2002 {
2003         struct ieee80211vap *vap = ni->ni_vap;
2004         struct ieee80211_mesh_state *ms = vap->iv_mesh;
2005         struct ieee80211_meshpeer_ie ie;
2006         const struct ieee80211_meshpeer_ie *meshpeer;
2007         uint16_t args[3];
2008
2009         /* +2+2 for action + code + capabilites */
2010         meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2, efrm, &ie,
2011             IEEE80211_ACTION_MESHPEERING_OPEN);
2012         if (meshpeer == NULL) {
2013                 return 0;
2014         }
2015
2016         /* XXX move up */
2017         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2018             "recv PEER OPEN, lid 0x%x", meshpeer->peer_llinkid);
2019
2020         switch (ni->ni_mlstate) {
2021         case IEEE80211_NODE_MESH_IDLE:
2022                 /* Reject open request if reached our maximum neighbor count */
2023                 if (ms->ms_neighbors >= IEEE80211_MESH_MAX_NEIGHBORS) {
2024                         args[0] = meshpeer->peer_llinkid;
2025                         args[1] = 0;
2026                         args[2] = IEEE80211_REASON_MESH_MAX_PEERS;
2027                         ieee80211_send_action(ni,
2028                             IEEE80211_ACTION_CAT_SELF_PROT,
2029                             IEEE80211_ACTION_MESHPEERING_CLOSE,
2030                             args);
2031                         /* stay in IDLE state */
2032                         return (0);
2033                 }
2034                 /* Open frame accepted */
2035                 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV);
2036                 ni->ni_mllid = meshpeer->peer_llinkid;
2037                 ni->ni_mlpid = mesh_generateid(vap);
2038                 if (ni->ni_mlpid == 0)
2039                         return 0;               /* XXX */
2040                 args[0] = ni->ni_mlpid;
2041                 /* Announce we're open too... */
2042                 ieee80211_send_action(ni,
2043                     IEEE80211_ACTION_CAT_SELF_PROT,
2044                     IEEE80211_ACTION_MESHPEERING_OPEN, args);
2045                 /* ...and confirm the link. */
2046                 args[0] = ni->ni_mlpid;
2047                 args[1] = ni->ni_mllid;
2048                 ieee80211_send_action(ni,
2049                     IEEE80211_ACTION_CAT_SELF_PROT,
2050                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
2051                     args);
2052                 mesh_peer_timeout_setup(ni);
2053                 break;
2054         case IEEE80211_NODE_MESH_OPENRCV:
2055                 /* Wrong Link ID */
2056                 if (ni->ni_mllid != meshpeer->peer_llinkid) {
2057                         args[0] = ni->ni_mllid;
2058                         args[1] = ni->ni_mlpid;
2059                         args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2060                         ieee80211_send_action(ni,
2061                             IEEE80211_ACTION_CAT_SELF_PROT,
2062                             IEEE80211_ACTION_MESHPEERING_CLOSE,
2063                             args);
2064                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2065                         mesh_peer_timeout_setup(ni);
2066                         break;
2067                 }
2068                 /* Duplicate open, confirm again. */
2069                 args[0] = ni->ni_mlpid;
2070                 args[1] = ni->ni_mllid;
2071                 ieee80211_send_action(ni,
2072                     IEEE80211_ACTION_CAT_SELF_PROT,
2073                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
2074                     args);
2075                 break;
2076         case IEEE80211_NODE_MESH_OPENSNT:
2077                 ni->ni_mllid = meshpeer->peer_llinkid;
2078                 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV);
2079                 args[0] = ni->ni_mlpid;
2080                 args[1] = ni->ni_mllid;
2081                 ieee80211_send_action(ni,
2082                     IEEE80211_ACTION_CAT_SELF_PROT,
2083                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
2084                     args);
2085                 /* NB: don't setup/clear any timeout */
2086                 break;
2087         case IEEE80211_NODE_MESH_CONFIRMRCV:
2088                 if (ni->ni_mlpid != meshpeer->peer_linkid ||
2089                     ni->ni_mllid != meshpeer->peer_llinkid) {
2090                         args[0] = ni->ni_mlpid;
2091                         args[1] = ni->ni_mllid;
2092                         args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2093                         ieee80211_send_action(ni,
2094                             IEEE80211_ACTION_CAT_SELF_PROT,
2095                             IEEE80211_ACTION_MESHPEERING_CLOSE,
2096                             args);
2097                         mesh_linkchange(ni,
2098                             IEEE80211_NODE_MESH_HOLDING);
2099                         mesh_peer_timeout_setup(ni);
2100                         break;
2101                 }
2102                 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED);
2103                 ni->ni_mllid = meshpeer->peer_llinkid;
2104                 args[0] = ni->ni_mlpid;
2105                 args[1] = ni->ni_mllid;
2106                 ieee80211_send_action(ni,
2107                     IEEE80211_ACTION_CAT_SELF_PROT,
2108                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
2109                     args);
2110                 mesh_peer_timeout_stop(ni);
2111                 break;
2112         case IEEE80211_NODE_MESH_ESTABLISHED:
2113                 if (ni->ni_mllid != meshpeer->peer_llinkid) {
2114                         args[0] = ni->ni_mllid;
2115                         args[1] = ni->ni_mlpid;
2116                         args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2117                         ieee80211_send_action(ni,
2118                             IEEE80211_ACTION_CAT_SELF_PROT,
2119                             IEEE80211_ACTION_MESHPEERING_CLOSE,
2120                             args);
2121                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2122                         mesh_peer_timeout_setup(ni);
2123                         break;
2124                 }
2125                 args[0] = ni->ni_mlpid;
2126                 args[1] = ni->ni_mllid;
2127                 ieee80211_send_action(ni,
2128                     IEEE80211_ACTION_CAT_SELF_PROT,
2129                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
2130                     args);
2131                 break;
2132         case IEEE80211_NODE_MESH_HOLDING:
2133                 args[0] = ni->ni_mlpid;
2134                 args[1] = meshpeer->peer_llinkid;
2135                 /* Standard not clear about what the reaason code should be */
2136                 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2137                 ieee80211_send_action(ni,
2138                     IEEE80211_ACTION_CAT_SELF_PROT,
2139                     IEEE80211_ACTION_MESHPEERING_CLOSE,
2140                     args);
2141                 break;
2142         }
2143         return 0;
2144 }
2145
2146 static int
2147 mesh_recv_action_meshpeering_confirm(struct ieee80211_node *ni,
2148         const struct ieee80211_frame *wh,
2149         const uint8_t *frm, const uint8_t *efrm)
2150 {
2151         struct ieee80211vap *vap = ni->ni_vap;
2152         struct ieee80211_meshpeer_ie ie;
2153         const struct ieee80211_meshpeer_ie *meshpeer;
2154         uint16_t args[3];
2155
2156         /* +2+2+2+2 for action + code + capabilites + status code + AID */
2157         meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2+2+2, efrm, &ie,
2158             IEEE80211_ACTION_MESHPEERING_CONFIRM);
2159         if (meshpeer == NULL) {
2160                 return 0;
2161         }
2162
2163         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2164             "recv PEER CONFIRM, local id 0x%x, peer id 0x%x",
2165             meshpeer->peer_llinkid, meshpeer->peer_linkid);
2166
2167         switch (ni->ni_mlstate) {
2168         case IEEE80211_NODE_MESH_OPENRCV:
2169                 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED);
2170                 mesh_peer_timeout_stop(ni);
2171                 break;
2172         case IEEE80211_NODE_MESH_OPENSNT:
2173                 mesh_linkchange(ni, IEEE80211_NODE_MESH_CONFIRMRCV);
2174                 mesh_peer_timeout_setup(ni);
2175                 break;
2176         case IEEE80211_NODE_MESH_HOLDING:
2177                 args[0] = ni->ni_mlpid;
2178                 args[1] = meshpeer->peer_llinkid;
2179                 /* Standard not clear about what the reaason code should be */
2180                 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2181                 ieee80211_send_action(ni,
2182                     IEEE80211_ACTION_CAT_SELF_PROT,
2183                     IEEE80211_ACTION_MESHPEERING_CLOSE,
2184                     args);
2185                 break;
2186         case IEEE80211_NODE_MESH_CONFIRMRCV:
2187                 if (ni->ni_mllid != meshpeer->peer_llinkid) {
2188                         args[0] = ni->ni_mlpid;
2189                         args[1] = ni->ni_mllid;
2190                         args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2191                         ieee80211_send_action(ni,
2192                             IEEE80211_ACTION_CAT_SELF_PROT,
2193                             IEEE80211_ACTION_MESHPEERING_CLOSE,
2194                             args);
2195                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2196                         mesh_peer_timeout_setup(ni);
2197                 }
2198                 break;
2199         default:
2200                 IEEE80211_DISCARD(vap,
2201                     IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2202                     wh, NULL, "received confirm in invalid state %d",
2203                     ni->ni_mlstate);
2204                 vap->iv_stats.is_rx_mgtdiscard++;
2205                 break;
2206         }
2207         return 0;
2208 }
2209
2210 static int
2211 mesh_recv_action_meshpeering_close(struct ieee80211_node *ni,
2212         const struct ieee80211_frame *wh,
2213         const uint8_t *frm, const uint8_t *efrm)
2214 {
2215         struct ieee80211_meshpeer_ie ie;
2216         const struct ieee80211_meshpeer_ie *meshpeer;
2217         uint16_t args[3];
2218
2219         /* +2 for action + code */
2220         meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2, efrm, &ie,
2221             IEEE80211_ACTION_MESHPEERING_CLOSE);
2222         if (meshpeer == NULL) {
2223                 return 0;
2224         }
2225
2226         /*
2227          * XXX: check reason code, for example we could receive
2228          * IEEE80211_REASON_MESH_MAX_PEERS then we should not attempt
2229          * to peer again.
2230          */
2231
2232         IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2233             ni, "%s", "recv PEER CLOSE");
2234
2235         switch (ni->ni_mlstate) {
2236         case IEEE80211_NODE_MESH_IDLE:
2237                 /* ignore */
2238                 break;
2239         case IEEE80211_NODE_MESH_OPENRCV:
2240         case IEEE80211_NODE_MESH_OPENSNT:
2241         case IEEE80211_NODE_MESH_CONFIRMRCV:
2242         case IEEE80211_NODE_MESH_ESTABLISHED:
2243                 args[0] = ni->ni_mlpid;
2244                 args[1] = ni->ni_mllid;
2245                 args[2] = IEEE80211_REASON_MESH_CLOSE_RCVD;
2246                 ieee80211_send_action(ni,
2247                     IEEE80211_ACTION_CAT_SELF_PROT,
2248                     IEEE80211_ACTION_MESHPEERING_CLOSE,
2249                     args);
2250                 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2251                 mesh_peer_timeout_setup(ni);
2252                 break;
2253         case IEEE80211_NODE_MESH_HOLDING:
2254                 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE);
2255                 mesh_peer_timeout_stop(ni);
2256                 break;
2257         }
2258         return 0;
2259 }
2260
2261 /*
2262  * Link Metric handling.
2263  */
2264 static int
2265 mesh_recv_action_meshlmetric(struct ieee80211_node *ni,
2266         const struct ieee80211_frame *wh,
2267         const uint8_t *frm, const uint8_t *efrm)
2268 {
2269         const struct ieee80211_meshlmetric_ie *ie =
2270             (const struct ieee80211_meshlmetric_ie *)
2271             (frm+2); /* action + code */
2272         struct ieee80211_meshlmetric_ie lm_rep;
2273
2274         if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) {
2275                 lm_rep.lm_flags = 0;
2276                 lm_rep.lm_metric = mesh_airtime_calc(ni);
2277                 ieee80211_send_action(ni,
2278                     IEEE80211_ACTION_CAT_MESH,
2279                     IEEE80211_ACTION_MESH_LMETRIC,
2280                     &lm_rep);
2281         }
2282         /* XXX: else do nothing for now */
2283         return 0;
2284 }
2285
2286 static int
2287 mesh_send_action(struct ieee80211_node *ni, struct mbuf *m)
2288 {
2289         struct ieee80211_bpf_params params;
2290
2291         memset(&params, 0, sizeof(params));
2292         params.ibp_pri = WME_AC_VO;
2293         params.ibp_rate0 = ni->ni_txparms->mgmtrate;
2294         /* XXX ucast/mcast */
2295         params.ibp_try0 = ni->ni_txparms->maxretry;
2296         params.ibp_power = ni->ni_txpower;
2297         return ieee80211_mgmt_output(ni, m, IEEE80211_FC0_SUBTYPE_ACTION,
2298              &params);
2299 }
2300
2301 #define ADDSHORT(frm, v) do {                   \
2302         frm[0] = (v) & 0xff;                    \
2303         frm[1] = (v) >> 8;                      \
2304         frm += 2;                               \
2305 } while (0)
2306 #define ADDWORD(frm, v) do {                    \
2307         frm[0] = (v) & 0xff;                    \
2308         frm[1] = ((v) >> 8) & 0xff;             \
2309         frm[2] = ((v) >> 16) & 0xff;            \
2310         frm[3] = ((v) >> 24) & 0xff;            \
2311         frm += 4;                               \
2312 } while (0)
2313
2314 static int
2315 mesh_send_action_meshpeering_open(struct ieee80211_node *ni,
2316         int category, int action, void *args0)
2317 {
2318         struct ieee80211vap *vap = ni->ni_vap;
2319         struct ieee80211com *ic = ni->ni_ic;
2320         uint16_t *args = args0;
2321         const struct ieee80211_rateset *rs;
2322         struct mbuf *m;
2323         uint8_t *frm;
2324
2325         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2326             "send PEER OPEN action: localid 0x%x", args[0]);
2327
2328         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2329             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2330             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2331         ieee80211_ref_node(ni);
2332
2333         m = ieee80211_getmgtframe(&frm,
2334             ic->ic_headroom + sizeof(struct ieee80211_frame),
2335             sizeof(uint16_t)    /* action+category */
2336             + sizeof(uint16_t)  /* capabilites */
2337             + 2 + IEEE80211_RATE_SIZE
2338             + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
2339             + 2 + IEEE80211_MESHID_LEN
2340             + sizeof(struct ieee80211_meshconf_ie)
2341             + sizeof(struct ieee80211_meshpeer_ie)
2342         );
2343         if (m != NULL) {
2344                 /*
2345                  * mesh peer open action frame format:
2346                  *   [1] category
2347                  *   [1] action
2348                  *   [2] capabilities
2349                  *   [tlv] rates
2350                  *   [tlv] xrates
2351                  *   [tlv] mesh id
2352                  *   [tlv] mesh conf
2353                  *   [tlv] mesh peer link mgmt
2354                  */
2355                 *frm++ = category;
2356                 *frm++ = action;
2357                 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan));
2358                 rs = ieee80211_get_suprates(ic, ic->ic_curchan);
2359                 frm = ieee80211_add_rates(frm, rs);
2360                 frm = ieee80211_add_xrates(frm, rs);
2361                 frm = ieee80211_add_meshid(frm, vap);
2362                 frm = ieee80211_add_meshconf(frm, vap);
2363                 frm = ieee80211_add_meshpeer(frm, IEEE80211_ACTION_MESHPEERING_OPEN,
2364                     args[0], 0, 0);
2365                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2366                 return mesh_send_action(ni, m);
2367         } else {
2368                 vap->iv_stats.is_tx_nobuf++;
2369                 ieee80211_free_node(ni);
2370                 return ENOMEM;
2371         }
2372 }
2373
2374 static int
2375 mesh_send_action_meshpeering_confirm(struct ieee80211_node *ni,
2376         int category, int action, void *args0)
2377 {
2378         struct ieee80211vap *vap = ni->ni_vap;
2379         struct ieee80211com *ic = ni->ni_ic;
2380         uint16_t *args = args0;
2381         const struct ieee80211_rateset *rs;
2382         struct mbuf *m;
2383         uint8_t *frm;
2384
2385         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2386             "send PEER CONFIRM action: localid 0x%x, peerid 0x%x",
2387             args[0], args[1]);
2388
2389         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2390             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2391             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2392         ieee80211_ref_node(ni);
2393
2394         m = ieee80211_getmgtframe(&frm,
2395             ic->ic_headroom + sizeof(struct ieee80211_frame),
2396             sizeof(uint16_t)    /* action+category */
2397             + sizeof(uint16_t)  /* capabilites */
2398             + sizeof(uint16_t)  /* status code */
2399             + sizeof(uint16_t)  /* AID */
2400             + 2 + IEEE80211_RATE_SIZE
2401             + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
2402             + 2 + IEEE80211_MESHID_LEN
2403             + sizeof(struct ieee80211_meshconf_ie)
2404             + sizeof(struct ieee80211_meshpeer_ie)
2405         );
2406         if (m != NULL) {
2407                 /*
2408                  * mesh peer confirm action frame format:
2409                  *   [1] category
2410                  *   [1] action
2411                  *   [2] capabilities
2412                  *   [2] status code
2413                  *   [2] association id (peer ID)
2414                  *   [tlv] rates
2415                  *   [tlv] xrates
2416                  *   [tlv] mesh id
2417                  *   [tlv] mesh conf
2418                  *   [tlv] mesh peer link mgmt
2419                  */
2420                 *frm++ = category;
2421                 *frm++ = action;
2422                 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan));
2423                 ADDSHORT(frm, 0);               /* status code */
2424                 ADDSHORT(frm, args[1]);         /* AID */
2425                 rs = ieee80211_get_suprates(ic, ic->ic_curchan);
2426                 frm = ieee80211_add_rates(frm, rs);
2427                 frm = ieee80211_add_xrates(frm, rs);
2428                 frm = ieee80211_add_meshid(frm, vap);
2429                 frm = ieee80211_add_meshconf(frm, vap);
2430                 frm = ieee80211_add_meshpeer(frm,
2431                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
2432                     args[0], args[1], 0);
2433                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2434                 return mesh_send_action(ni, m);
2435         } else {
2436                 vap->iv_stats.is_tx_nobuf++;
2437                 ieee80211_free_node(ni);
2438                 return ENOMEM;
2439         }
2440 }
2441
2442 static int
2443 mesh_send_action_meshpeering_close(struct ieee80211_node *ni,
2444         int category, int action, void *args0)
2445 {
2446         struct ieee80211vap *vap = ni->ni_vap;
2447         struct ieee80211com *ic = ni->ni_ic;
2448         uint16_t *args = args0;
2449         struct mbuf *m;
2450         uint8_t *frm;
2451
2452         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2453             "send PEER CLOSE action: localid 0x%x, peerid 0x%x reason %d",
2454             args[0], args[1], args[2]);
2455
2456         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2457             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2458             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2459         ieee80211_ref_node(ni);
2460
2461         m = ieee80211_getmgtframe(&frm,
2462             ic->ic_headroom + sizeof(struct ieee80211_frame),
2463             sizeof(uint16_t)    /* action+category */
2464             + sizeof(uint16_t)  /* reason code */
2465             + 2 + IEEE80211_MESHID_LEN
2466             + sizeof(struct ieee80211_meshpeer_ie)
2467         );
2468         if (m != NULL) {
2469                 /*
2470                  * mesh peer close action frame format:
2471                  *   [1] category
2472                  *   [1] action
2473                  *   [tlv] mesh id
2474                  *   [tlv] mesh peer link mgmt
2475                  */
2476                 *frm++ = category;
2477                 *frm++ = action;
2478                 frm = ieee80211_add_meshid(frm, vap);
2479                 frm = ieee80211_add_meshpeer(frm,
2480                     IEEE80211_ACTION_MESHPEERING_CLOSE,
2481                     args[0], args[1], args[2]);
2482                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2483                 return mesh_send_action(ni, m);
2484         } else {
2485                 vap->iv_stats.is_tx_nobuf++;
2486                 ieee80211_free_node(ni);
2487                 return ENOMEM;
2488         }
2489 }
2490
2491 static int
2492 mesh_send_action_meshlmetric(struct ieee80211_node *ni,
2493         int category, int action, void *arg0)
2494 {
2495         struct ieee80211vap *vap = ni->ni_vap;
2496         struct ieee80211com *ic = ni->ni_ic;
2497         struct ieee80211_meshlmetric_ie *ie = arg0;
2498         struct mbuf *m;
2499         uint8_t *frm;
2500
2501         if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) {
2502                 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2503                     ni, "%s", "send LINK METRIC REQUEST action");
2504         } else {
2505                 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2506                     ni, "send LINK METRIC REPLY action: metric 0x%x",
2507                     ie->lm_metric);
2508         }
2509         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2510             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2511             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2512         ieee80211_ref_node(ni);
2513
2514         m = ieee80211_getmgtframe(&frm,
2515             ic->ic_headroom + sizeof(struct ieee80211_frame),
2516             sizeof(uint16_t) +  /* action+category */
2517             sizeof(struct ieee80211_meshlmetric_ie)
2518         );
2519         if (m != NULL) {
2520                 /*
2521                  * mesh link metric
2522                  *   [1] category
2523                  *   [1] action
2524                  *   [tlv] mesh link metric
2525                  */
2526                 *frm++ = category;
2527                 *frm++ = action;
2528                 frm = ieee80211_add_meshlmetric(frm,
2529                     ie->lm_flags, ie->lm_metric);
2530                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2531                 return mesh_send_action(ni, m);
2532         } else {
2533                 vap->iv_stats.is_tx_nobuf++;
2534                 ieee80211_free_node(ni);
2535                 return ENOMEM;
2536         }
2537 }
2538
2539 static void
2540 mesh_peer_timeout_setup(struct ieee80211_node *ni)
2541 {
2542         switch (ni->ni_mlstate) {
2543         case IEEE80211_NODE_MESH_HOLDING:
2544                 ni->ni_mltval = ieee80211_mesh_holdingtimeout;
2545                 break;
2546         case IEEE80211_NODE_MESH_CONFIRMRCV:
2547                 ni->ni_mltval = ieee80211_mesh_confirmtimeout;
2548                 break;
2549         case IEEE80211_NODE_MESH_IDLE:
2550                 ni->ni_mltval = 0;
2551                 break;
2552         default:
2553                 ni->ni_mltval = ieee80211_mesh_retrytimeout;
2554                 break;
2555         }
2556         if (ni->ni_mltval)
2557                 callout_reset(&ni->ni_mltimer, ni->ni_mltval,
2558                     mesh_peer_timeout_cb, ni);
2559 }
2560
2561 /*
2562  * Same as above but backoffs timer statisically 50%.
2563  */
2564 static void
2565 mesh_peer_timeout_backoff(struct ieee80211_node *ni)
2566 {
2567         uint32_t r;
2568
2569         r = arc4random();
2570         ni->ni_mltval += r % ni->ni_mltval;
2571         callout_reset(&ni->ni_mltimer, ni->ni_mltval, mesh_peer_timeout_cb,
2572             ni);
2573 }
2574
2575 static __inline void
2576 mesh_peer_timeout_stop(struct ieee80211_node *ni)
2577 {
2578         callout_drain(&ni->ni_mltimer);
2579 }
2580
2581 /*
2582  * Mesh Peer Link Management FSM timeout handling.
2583  */
2584 static void
2585 mesh_peer_timeout_cb(void *arg)
2586 {
2587         struct ieee80211_node *ni = (struct ieee80211_node *)arg;
2588         uint16_t args[3];
2589
2590         IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_MESH,
2591             ni, "mesh link timeout, state %d, retry counter %d",
2592             ni->ni_mlstate, ni->ni_mlrcnt);
2593
2594         switch (ni->ni_mlstate) {
2595         case IEEE80211_NODE_MESH_IDLE:
2596         case IEEE80211_NODE_MESH_ESTABLISHED:
2597                 break;
2598         case IEEE80211_NODE_MESH_OPENSNT:
2599         case IEEE80211_NODE_MESH_OPENRCV:
2600                 if (ni->ni_mlrcnt == ieee80211_mesh_maxretries) {
2601                         args[0] = ni->ni_mlpid;
2602                         args[2] = IEEE80211_REASON_MESH_MAX_RETRIES;
2603                         ieee80211_send_action(ni,
2604                             IEEE80211_ACTION_CAT_SELF_PROT,
2605                             IEEE80211_ACTION_MESHPEERING_CLOSE, args);
2606                         ni->ni_mlrcnt = 0;
2607                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2608                         mesh_peer_timeout_setup(ni);
2609                 } else {
2610                         args[0] = ni->ni_mlpid;
2611                         ieee80211_send_action(ni,
2612                             IEEE80211_ACTION_CAT_SELF_PROT,
2613                             IEEE80211_ACTION_MESHPEERING_OPEN, args);
2614                         ni->ni_mlrcnt++;
2615                         mesh_peer_timeout_backoff(ni);
2616                 }
2617                 break;
2618         case IEEE80211_NODE_MESH_CONFIRMRCV:
2619                 args[0] = ni->ni_mlpid;
2620                 args[2] = IEEE80211_REASON_MESH_CONFIRM_TIMEOUT;
2621                 ieee80211_send_action(ni,
2622                     IEEE80211_ACTION_CAT_SELF_PROT,
2623                     IEEE80211_ACTION_MESHPEERING_CLOSE, args);
2624                 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2625                 mesh_peer_timeout_setup(ni);
2626                 break;
2627         case IEEE80211_NODE_MESH_HOLDING:
2628                 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE);
2629                 break;
2630         }
2631 }
2632
2633 static int
2634 mesh_verify_meshid(struct ieee80211vap *vap, const uint8_t *ie)
2635 {
2636         struct ieee80211_mesh_state *ms = vap->iv_mesh;
2637
2638         if (ie == NULL || ie[1] != ms->ms_idlen)
2639                 return 1;
2640         return memcmp(ms->ms_id, ie + 2, ms->ms_idlen);
2641 }
2642
2643 /*
2644  * Check if we are using the same algorithms for this mesh.
2645  */
2646 static int
2647 mesh_verify_meshconf(struct ieee80211vap *vap, const uint8_t *ie)
2648 {
2649         const struct ieee80211_meshconf_ie *meshconf =
2650             (const struct ieee80211_meshconf_ie *) ie;
2651         const struct ieee80211_mesh_state *ms = vap->iv_mesh;
2652
2653         if (meshconf == NULL)
2654                 return 1;
2655         if (meshconf->conf_pselid != ms->ms_ppath->mpp_ie) {
2656                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
2657                     "unknown path selection algorithm: 0x%x\n",
2658                     meshconf->conf_pselid);
2659                 return 1;
2660         }
2661         if (meshconf->conf_pmetid != ms->ms_pmetric->mpm_ie) {
2662                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
2663                     "unknown path metric algorithm: 0x%x\n",
2664                     meshconf->conf_pmetid);
2665                 return 1;
2666         }
2667         if (meshconf->conf_ccid != 0) {
2668                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
2669                     "unknown congestion control algorithm: 0x%x\n",
2670                     meshconf->conf_ccid);
2671                 return 1;
2672         }
2673         if (meshconf->conf_syncid != IEEE80211_MESHCONF_SYNC_NEIGHOFF) {
2674                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
2675                     "unknown sync algorithm: 0x%x\n",
2676                     meshconf->conf_syncid);
2677                 return 1;
2678         }
2679         if (meshconf->conf_authid != 0) {
2680                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
2681                     "unknown auth auth algorithm: 0x%x\n",
2682                     meshconf->conf_pselid);
2683                 return 1;
2684         }
2685         /* Not accepting peers */
2686         if (!(meshconf->conf_cap & IEEE80211_MESHCONF_CAP_AP)) {
2687                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
2688                     "not accepting peers: 0x%x\n", meshconf->conf_cap);
2689                 return 1;
2690         }
2691         return 0;
2692 }
2693
2694 static int
2695 mesh_verify_meshpeer(struct ieee80211vap *vap, uint8_t subtype,
2696     const uint8_t *ie)
2697 {
2698         const struct ieee80211_meshpeer_ie *meshpeer =
2699             (const struct ieee80211_meshpeer_ie *) ie;
2700
2701         if (meshpeer == NULL ||
2702             meshpeer->peer_len < IEEE80211_MPM_BASE_SZ ||
2703             meshpeer->peer_len > IEEE80211_MPM_MAX_SZ)
2704                 return 1;
2705         if (meshpeer->peer_proto != IEEE80211_MPPID_MPM) {
2706                 IEEE80211_DPRINTF(vap,
2707                     IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2708                     "Only MPM protocol is supported (proto: 0x%02X)",
2709                     meshpeer->peer_proto);
2710                 return 1;
2711         }
2712         switch (subtype) {
2713         case IEEE80211_ACTION_MESHPEERING_OPEN:
2714                 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ)
2715                         return 1;
2716                 break;
2717         case IEEE80211_ACTION_MESHPEERING_CONFIRM:
2718                 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ + 2)
2719                         return 1;
2720                 break;
2721         case IEEE80211_ACTION_MESHPEERING_CLOSE:
2722                 if (meshpeer->peer_len < IEEE80211_MPM_BASE_SZ + 2)
2723                         return 1;
2724                 if (meshpeer->peer_len == (IEEE80211_MPM_BASE_SZ + 2) &&
2725                     meshpeer->peer_linkid != 0)
2726                         return 1;
2727                 if (meshpeer->peer_rcode == 0)
2728                         return 1;
2729                 break;
2730         }
2731         return 0;
2732 }
2733
2734 /*
2735  * Add a Mesh ID IE to a frame.
2736  */
2737 uint8_t *
2738 ieee80211_add_meshid(uint8_t *frm, struct ieee80211vap *vap)
2739 {
2740         struct ieee80211_mesh_state *ms = vap->iv_mesh;
2741
2742         KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a mbss vap"));
2743
2744         *frm++ = IEEE80211_ELEMID_MESHID;
2745         *frm++ = ms->ms_idlen;
2746         memcpy(frm, ms->ms_id, ms->ms_idlen);
2747         return frm + ms->ms_idlen;
2748 }
2749
2750 /*
2751  * Add a Mesh Configuration IE to a frame.
2752  * For now just use HWMP routing, Airtime link metric, Null Congestion
2753  * Signaling, Null Sync Protocol and Null Authentication.
2754  */
2755 uint8_t *
2756 ieee80211_add_meshconf(uint8_t *frm, struct ieee80211vap *vap)
2757 {
2758         const struct ieee80211_mesh_state *ms = vap->iv_mesh;
2759         uint16_t caps;
2760
2761         KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap"));
2762
2763         *frm++ = IEEE80211_ELEMID_MESHCONF;
2764         *frm++ = IEEE80211_MESH_CONF_SZ;
2765         *frm++ = ms->ms_ppath->mpp_ie;          /* path selection */
2766         *frm++ = ms->ms_pmetric->mpm_ie;        /* link metric */
2767         *frm++ = IEEE80211_MESHCONF_CC_DISABLED;
2768         *frm++ = IEEE80211_MESHCONF_SYNC_NEIGHOFF;
2769         *frm++ = IEEE80211_MESHCONF_AUTH_DISABLED;
2770         /* NB: set the number of neighbors before the rest */
2771         *frm = (ms->ms_neighbors > IEEE80211_MESH_MAX_NEIGHBORS ?
2772             IEEE80211_MESH_MAX_NEIGHBORS : ms->ms_neighbors) << 1;
2773         if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE)
2774                 *frm |= IEEE80211_MESHCONF_FORM_GATE;
2775         frm += 1;
2776         caps = 0;
2777         if (ms->ms_flags & IEEE80211_MESHFLAGS_AP)
2778                 caps |= IEEE80211_MESHCONF_CAP_AP;
2779         if (ms->ms_flags & IEEE80211_MESHFLAGS_FWD)
2780                 caps |= IEEE80211_MESHCONF_CAP_FWRD;
2781         *frm++ = caps;
2782         return frm;
2783 }
2784
2785 /*
2786  * Add a Mesh Peer Management IE to a frame.
2787  */
2788 uint8_t *
2789 ieee80211_add_meshpeer(uint8_t *frm, uint8_t subtype, uint16_t localid,
2790     uint16_t peerid, uint16_t reason)
2791 {
2792
2793         KASSERT(localid != 0, ("localid == 0"));
2794
2795         *frm++ = IEEE80211_ELEMID_MESHPEER;
2796         switch (subtype) {
2797         case IEEE80211_ACTION_MESHPEERING_OPEN:
2798                 *frm++ = IEEE80211_MPM_BASE_SZ;         /* length */
2799                 ADDSHORT(frm, IEEE80211_MPPID_MPM);     /* proto */
2800                 ADDSHORT(frm, localid);                 /* local ID */
2801                 break;
2802         case IEEE80211_ACTION_MESHPEERING_CONFIRM:
2803                 KASSERT(peerid != 0, ("sending peer confirm without peer id"));
2804                 *frm++ = IEEE80211_MPM_BASE_SZ + 2;     /* length */
2805                 ADDSHORT(frm, IEEE80211_MPPID_MPM);     /* proto */
2806                 ADDSHORT(frm, localid);                 /* local ID */
2807                 ADDSHORT(frm, peerid);                  /* peer ID */
2808                 break;
2809         case IEEE80211_ACTION_MESHPEERING_CLOSE:
2810                 if (peerid)
2811                         *frm++ = IEEE80211_MPM_MAX_SZ;  /* length */
2812                 else
2813                         *frm++ = IEEE80211_MPM_BASE_SZ + 2; /* length */
2814                 ADDSHORT(frm, IEEE80211_MPPID_MPM);     /* proto */
2815                 ADDSHORT(frm, localid); /* local ID */
2816                 if (peerid)
2817                         ADDSHORT(frm, peerid);  /* peer ID */
2818                 ADDSHORT(frm, reason);
2819                 break;
2820         }
2821         return frm;
2822 }
2823
2824 /*
2825  * Compute an Airtime Link Metric for the link with this node.
2826  *
2827  * Based on Draft 3.0 spec (11B.10, p.149).
2828  */
2829 /*
2830  * Max 802.11s overhead.
2831  */
2832 #define IEEE80211_MESH_MAXOVERHEAD \
2833         (sizeof(struct ieee80211_qosframe_addr4) \
2834          + sizeof(struct ieee80211_meshcntl_ae10) \
2835         + sizeof(struct llc) \
2836         + IEEE80211_ADDR_LEN \
2837         + IEEE80211_WEP_IVLEN \
2838         + IEEE80211_WEP_KIDLEN \
2839         + IEEE80211_WEP_CRCLEN \
2840         + IEEE80211_WEP_MICLEN \
2841         + IEEE80211_CRC_LEN)
2842 uint32_t
2843 mesh_airtime_calc(struct ieee80211_node *ni)
2844 {
2845 #define M_BITS 8
2846 #define S_FACTOR (2 * M_BITS)
2847         struct ieee80211com *ic = ni->ni_ic;
2848         struct ifnet *ifp = ni->ni_vap->iv_ifp;
2849         const static int nbits = 8192 << M_BITS;
2850         uint32_t overhead, rate, errrate;
2851         uint64_t res;
2852
2853         /* Time to transmit a frame */
2854         rate = ni->ni_txrate;
2855         overhead = ieee80211_compute_duration(ic->ic_rt,
2856             ifp->if_mtu + IEEE80211_MESH_MAXOVERHEAD, rate, 0) << M_BITS;
2857         /* Error rate in percentage */
2858         /* XXX assuming small failures are ok */
2859         errrate = (((ifp->if_oerrors +
2860             ifp->if_ierrors) / 100) << M_BITS) / 100;
2861         res = (overhead + (nbits / rate)) *
2862             ((1 << S_FACTOR) / ((1 << M_BITS) - errrate));
2863
2864         return (uint32_t)(res >> S_FACTOR);
2865 #undef M_BITS
2866 #undef S_FACTOR
2867 }
2868
2869 /*
2870  * Add a Mesh Link Metric report IE to a frame.
2871  */
2872 uint8_t *
2873 ieee80211_add_meshlmetric(uint8_t *frm, uint8_t flags, uint32_t metric)
2874 {
2875         *frm++ = IEEE80211_ELEMID_MESHLINK;
2876         *frm++ = 5;
2877         *frm++ = flags;
2878         ADDWORD(frm, metric);
2879         return frm;
2880 }
2881 #undef ADDSHORT
2882 #undef ADDWORD
2883
2884 /*
2885  * Initialize any mesh-specific node state.
2886  */
2887 void
2888 ieee80211_mesh_node_init(struct ieee80211vap *vap, struct ieee80211_node *ni)
2889 {
2890         ni->ni_flags |= IEEE80211_NODE_QOS;
2891         callout_init(&ni->ni_mltimer, CALLOUT_MPSAFE);
2892 }
2893
2894 /*
2895  * Cleanup any mesh-specific node state.
2896  */
2897 void
2898 ieee80211_mesh_node_cleanup(struct ieee80211_node *ni)
2899 {
2900         struct ieee80211vap *vap = ni->ni_vap;
2901         struct ieee80211_mesh_state *ms = vap->iv_mesh;
2902
2903         callout_drain(&ni->ni_mltimer);
2904         /* NB: short-circuit callbacks after mesh_vdetach */
2905         if (vap->iv_mesh != NULL)
2906                 ms->ms_ppath->mpp_peerdown(ni);
2907 }
2908
2909 void
2910 ieee80211_parse_meshid(struct ieee80211_node *ni, const uint8_t *ie)
2911 {
2912         ni->ni_meshidlen = ie[1];
2913         memcpy(ni->ni_meshid, ie + 2, ie[1]);
2914 }
2915
2916 /*
2917  * Setup mesh-specific node state on neighbor discovery.
2918  */
2919 void
2920 ieee80211_mesh_init_neighbor(struct ieee80211_node *ni,
2921         const struct ieee80211_frame *wh,
2922         const struct ieee80211_scanparams *sp)
2923 {
2924         ieee80211_parse_meshid(ni, sp->meshid);
2925 }
2926
2927 void
2928 ieee80211_mesh_update_beacon(struct ieee80211vap *vap,
2929         struct ieee80211_beacon_offsets *bo)
2930 {
2931         KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap"));
2932
2933         if (isset(bo->bo_flags, IEEE80211_BEACON_MESHCONF)) {
2934                 (void)ieee80211_add_meshconf(bo->bo_meshconf, vap);
2935                 clrbit(bo->bo_flags, IEEE80211_BEACON_MESHCONF);
2936         }
2937 }
2938
2939 static int
2940 mesh_ioctl_get80211(struct ieee80211vap *vap, struct ieee80211req *ireq)
2941 {
2942         struct ieee80211_mesh_state *ms = vap->iv_mesh;
2943         uint8_t tmpmeshid[IEEE80211_NWID_LEN];
2944         struct ieee80211_mesh_route *rt;
2945         struct ieee80211req_mesh_route *imr;
2946         size_t len, off;
2947         uint8_t *p;
2948         int error;
2949
2950         if (vap->iv_opmode != IEEE80211_M_MBSS)
2951                 return ENOSYS;
2952
2953         error = 0;
2954         switch (ireq->i_type) {
2955         case IEEE80211_IOC_MESH_ID:
2956                 ireq->i_len = ms->ms_idlen;
2957                 memcpy(tmpmeshid, ms->ms_id, ireq->i_len);
2958                 error = copyout(tmpmeshid, ireq->i_data, ireq->i_len);
2959                 break;
2960         case IEEE80211_IOC_MESH_AP:
2961                 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_AP) != 0;
2962                 break;
2963         case IEEE80211_IOC_MESH_FWRD:
2964                 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) != 0;
2965                 break;
2966         case IEEE80211_IOC_MESH_GATE:
2967                 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) != 0;
2968                 break;
2969         case IEEE80211_IOC_MESH_TTL:
2970                 ireq->i_val = ms->ms_ttl;
2971                 break;
2972         case IEEE80211_IOC_MESH_RTCMD:
2973                 switch (ireq->i_val) {
2974                 case IEEE80211_MESH_RTCMD_LIST:
2975                         len = 0;
2976                         MESH_RT_LOCK(ms);
2977                         TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) {
2978                                 len += sizeof(*imr);
2979                         }
2980                         MESH_RT_UNLOCK(ms);
2981                         if (len > ireq->i_len || ireq->i_len < sizeof(*imr)) {
2982                                 ireq->i_len = len;
2983                                 return ENOMEM;
2984                         }
2985                         ireq->i_len = len;
2986                         /* XXX M_WAIT? */
2987                         p = malloc(len, M_TEMP, M_NOWAIT | M_ZERO);
2988                         if (p == NULL)
2989                                 return ENOMEM;
2990                         off = 0;
2991                         MESH_RT_LOCK(ms);
2992                         TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) {
2993                                 if (off >= len)
2994                                         break;
2995                                 imr = (struct ieee80211req_mesh_route *)
2996                                     (p + off);
2997                                 IEEE80211_ADDR_COPY(imr->imr_dest,
2998                                     rt->rt_dest);
2999                                 IEEE80211_ADDR_COPY(imr->imr_nexthop,
3000                                     rt->rt_nexthop);
3001                                 imr->imr_metric = rt->rt_metric;
3002                                 imr->imr_nhops = rt->rt_nhops;
3003                                 imr->imr_lifetime =
3004                                     ieee80211_mesh_rt_update(rt, 0);
3005                                 imr->imr_lastmseq = rt->rt_lastmseq;
3006                                 imr->imr_flags = rt->rt_flags; /* last */
3007                                 off += sizeof(*imr);
3008                         }
3009                         MESH_RT_UNLOCK(ms);
3010                         error = copyout(p, (uint8_t *)ireq->i_data,
3011                             ireq->i_len);
3012                         free(p, M_TEMP);
3013                         break;
3014                 case IEEE80211_MESH_RTCMD_FLUSH:
3015                 case IEEE80211_MESH_RTCMD_ADD:
3016                 case IEEE80211_MESH_RTCMD_DELETE:
3017                         return EINVAL;
3018                 default:
3019                         return ENOSYS;
3020                 }
3021                 break;
3022         case IEEE80211_IOC_MESH_PR_METRIC:
3023                 len = strlen(ms->ms_pmetric->mpm_descr);
3024                 if (ireq->i_len < len)
3025                         return EINVAL;
3026                 ireq->i_len = len;
3027                 error = copyout(ms->ms_pmetric->mpm_descr,
3028                     (uint8_t *)ireq->i_data, len);
3029                 break;
3030         case IEEE80211_IOC_MESH_PR_PATH:
3031                 len = strlen(ms->ms_ppath->mpp_descr);
3032                 if (ireq->i_len < len)
3033                         return EINVAL;
3034                 ireq->i_len = len;
3035                 error = copyout(ms->ms_ppath->mpp_descr,
3036                     (uint8_t *)ireq->i_data, len);
3037                 break;
3038         default:
3039                 return ENOSYS;
3040         }
3041
3042         return error;
3043 }
3044 IEEE80211_IOCTL_GET(mesh, mesh_ioctl_get80211);
3045
3046 static int
3047 mesh_ioctl_set80211(struct ieee80211vap *vap, struct ieee80211req *ireq)
3048 {
3049         struct ieee80211_mesh_state *ms = vap->iv_mesh;
3050         uint8_t tmpmeshid[IEEE80211_NWID_LEN];
3051         uint8_t tmpaddr[IEEE80211_ADDR_LEN];
3052         char tmpproto[IEEE80211_MESH_PROTO_DSZ];
3053         int error;
3054
3055         if (vap->iv_opmode != IEEE80211_M_MBSS)
3056                 return ENOSYS;
3057
3058         error = 0;
3059         switch (ireq->i_type) {
3060         case IEEE80211_IOC_MESH_ID:
3061                 if (ireq->i_val != 0 || ireq->i_len > IEEE80211_MESHID_LEN)
3062                         return EINVAL;
3063                 error = copyin(ireq->i_data, tmpmeshid, ireq->i_len);
3064                 if (error != 0)
3065                         break;
3066                 memset(ms->ms_id, 0, IEEE80211_NWID_LEN);
3067                 ms->ms_idlen = ireq->i_len;
3068                 memcpy(ms->ms_id, tmpmeshid, ireq->i_len);
3069                 error = ENETRESET;
3070                 break;
3071         case IEEE80211_IOC_MESH_AP:
3072                 if (ireq->i_val)
3073                         ms->ms_flags |= IEEE80211_MESHFLAGS_AP;
3074                 else
3075                         ms->ms_flags &= ~IEEE80211_MESHFLAGS_AP;
3076                 error = ENETRESET;
3077                 break;
3078         case IEEE80211_IOC_MESH_FWRD:
3079                 if (ireq->i_val)
3080                         ms->ms_flags |= IEEE80211_MESHFLAGS_FWD;
3081                 else
3082                         ms->ms_flags &= ~IEEE80211_MESHFLAGS_FWD;
3083                 break;
3084         case IEEE80211_IOC_MESH_GATE:
3085                 if (ireq->i_val)
3086                         ms->ms_flags |= IEEE80211_MESHFLAGS_GATE;
3087                 else
3088                         ms->ms_flags &= ~IEEE80211_MESHFLAGS_GATE;
3089                 break;
3090         case IEEE80211_IOC_MESH_TTL:
3091                 ms->ms_ttl = (uint8_t) ireq->i_val;
3092                 break;
3093         case IEEE80211_IOC_MESH_RTCMD:
3094                 switch (ireq->i_val) {
3095                 case IEEE80211_MESH_RTCMD_LIST:
3096                         return EINVAL;
3097                 case IEEE80211_MESH_RTCMD_FLUSH:
3098                         ieee80211_mesh_rt_flush(vap);
3099                         break;
3100                 case IEEE80211_MESH_RTCMD_ADD:
3101                         if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ireq->i_data) ||
3102                             IEEE80211_ADDR_EQ(broadcastaddr, ireq->i_data))
3103                                 return EINVAL;
3104                         error = copyin(ireq->i_data, &tmpaddr,
3105                             IEEE80211_ADDR_LEN);
3106                         if (error == 0)
3107                                 ieee80211_mesh_discover(vap, tmpaddr, NULL);
3108                         break;
3109                 case IEEE80211_MESH_RTCMD_DELETE:
3110                         ieee80211_mesh_rt_del(vap, ireq->i_data);
3111                         break;
3112                 default:
3113                         return ENOSYS;
3114                 }
3115                 break;
3116         case IEEE80211_IOC_MESH_PR_METRIC:
3117                 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto));
3118                 if (error == 0) {
3119                         error = mesh_select_proto_metric(vap, tmpproto);
3120                         if (error == 0)
3121                                 error = ENETRESET;
3122                 }
3123                 break;
3124         case IEEE80211_IOC_MESH_PR_PATH:
3125                 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto));
3126                 if (error == 0) {
3127                         error = mesh_select_proto_path(vap, tmpproto);
3128                         if (error == 0)
3129                                 error = ENETRESET;
3130                 }
3131                 break;
3132         default:
3133                 return ENOSYS;
3134         }
3135         return error;
3136 }
3137 IEEE80211_IOCTL_SET(mesh, mesh_ioctl_set80211);