xref: /freebsd/sys/net80211/ieee80211_mesh.c (revision 3e65b9c6e6b7b2081d54e1dc40983c3c00eaf738)
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_req;
126 static	ieee80211_recv_action_func mesh_recv_action_meshlmetric_rep;
127 
128 static	ieee80211_send_action_func mesh_send_action_meshpeering_open;
129 static	ieee80211_send_action_func mesh_send_action_meshpeering_confirm;
130 static	ieee80211_send_action_func mesh_send_action_meshpeering_close;
131 static	ieee80211_send_action_func mesh_send_action_meshlink_request;
132 static	ieee80211_send_action_func mesh_send_action_meshlink_reply;
133 
134 static const struct ieee80211_mesh_proto_metric mesh_metric_airtime = {
135 	.mpm_descr	= "AIRTIME",
136 	.mpm_ie		= IEEE80211_MESHCONF_METRIC_AIRTIME,
137 	.mpm_metric	= mesh_airtime_calc,
138 };
139 
140 static struct ieee80211_mesh_proto_path		mesh_proto_paths[4];
141 static struct ieee80211_mesh_proto_metric	mesh_proto_metrics[4];
142 
143 #define	MESH_RT_LOCK(ms)	mtx_lock(&(ms)->ms_rt_lock)
144 #define	MESH_RT_LOCK_ASSERT(ms)	mtx_assert(&(ms)->ms_rt_lock, MA_OWNED)
145 #define	MESH_RT_UNLOCK(ms)	mtx_unlock(&(ms)->ms_rt_lock)
146 
147 MALLOC_DEFINE(M_80211_MESH_RT, "80211mesh", "802.11s routing table");
148 
149 /*
150  * Helper functions to manipulate the Mesh routing table.
151  */
152 
153 static struct ieee80211_mesh_route *
154 mesh_rt_find_locked(struct ieee80211_mesh_state *ms,
155     const uint8_t dest[IEEE80211_ADDR_LEN])
156 {
157 	struct ieee80211_mesh_route *rt;
158 
159 	MESH_RT_LOCK_ASSERT(ms);
160 
161 	TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) {
162 		if (IEEE80211_ADDR_EQ(dest, rt->rt_dest))
163 			return rt;
164 	}
165 	return NULL;
166 }
167 
168 static struct ieee80211_mesh_route *
169 mesh_rt_add_locked(struct ieee80211_mesh_state *ms,
170     const uint8_t dest[IEEE80211_ADDR_LEN])
171 {
172 	struct ieee80211_mesh_route *rt;
173 
174 	KASSERT(!IEEE80211_ADDR_EQ(broadcastaddr, dest),
175 	    ("%s: adding broadcast to the routing table", __func__));
176 
177 	MESH_RT_LOCK_ASSERT(ms);
178 
179 	rt = malloc(ALIGN(sizeof(struct ieee80211_mesh_route)) +
180 	    ms->ms_ppath->mpp_privlen, M_80211_MESH_RT, M_NOWAIT | M_ZERO);
181 	if (rt != NULL) {
182 		IEEE80211_ADDR_COPY(rt->rt_dest, dest);
183 		rt->rt_priv = (void *)ALIGN(&rt[1]);
184 		rt->rt_crtime = ticks;
185 		TAILQ_INSERT_TAIL(&ms->ms_routes, rt, rt_next);
186 	}
187 	return rt;
188 }
189 
190 struct ieee80211_mesh_route *
191 ieee80211_mesh_rt_find(struct ieee80211vap *vap,
192     const uint8_t dest[IEEE80211_ADDR_LEN])
193 {
194 	struct ieee80211_mesh_state *ms = vap->iv_mesh;
195 	struct ieee80211_mesh_route *rt;
196 
197 	MESH_RT_LOCK(ms);
198 	rt = mesh_rt_find_locked(ms, dest);
199 	MESH_RT_UNLOCK(ms);
200 	return rt;
201 }
202 
203 struct ieee80211_mesh_route *
204 ieee80211_mesh_rt_add(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 	KASSERT(ieee80211_mesh_rt_find(vap, dest) == NULL,
211 	    ("%s: duplicate entry in the routing table", __func__));
212 	KASSERT(!IEEE80211_ADDR_EQ(vap->iv_myaddr, dest),
213 	    ("%s: adding self to the routing table", __func__));
214 
215 	MESH_RT_LOCK(ms);
216 	rt = mesh_rt_add_locked(ms, dest);
217 	MESH_RT_UNLOCK(ms);
218 	return rt;
219 }
220 
221 /*
222  * Add a proxy route (as needed) for the specified destination.
223  */
224 void
225 ieee80211_mesh_proxy_check(struct ieee80211vap *vap,
226     const uint8_t dest[IEEE80211_ADDR_LEN])
227 {
228 	struct ieee80211_mesh_state *ms = vap->iv_mesh;
229 	struct ieee80211_mesh_route *rt;
230 
231 	MESH_RT_LOCK(ms);
232 	rt = mesh_rt_find_locked(ms, dest);
233 	if (rt == NULL) {
234 		rt = mesh_rt_add_locked(ms, dest);
235 		if (rt == NULL) {
236 			IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
237 			    "%s", "unable to add proxy entry");
238 			vap->iv_stats.is_mesh_rtaddfailed++;
239 		} else {
240 			IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
241 			    "%s", "add proxy entry");
242 			IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr);
243 			rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID
244 				     |  IEEE80211_MESHRT_FLAGS_PROXY;
245 		}
246 	/* XXX assert PROXY? */
247 	} else if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) {
248 		struct ieee80211com *ic = vap->iv_ic;
249 		/*
250 		 * Fix existing entry created by received frames from
251 		 * stations that have some memory of dest.  We also
252 		 * flush any frames held on the staging queue; delivering
253 		 * them is too much trouble right now.
254 		 */
255 		IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
256 		    "%s", "fix proxy entry");
257 		IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr);
258 		rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID
259 			     |  IEEE80211_MESHRT_FLAGS_PROXY;
260 		/* XXX belongs in hwmp */
261 		ieee80211_ageq_drain_node(&ic->ic_stageq,
262 		   (void *)(uintptr_t) ieee80211_mac_hash(ic, dest));
263 		/* XXX stat? */
264 	}
265 	MESH_RT_UNLOCK(ms);
266 }
267 
268 static __inline void
269 mesh_rt_del(struct ieee80211_mesh_state *ms, struct ieee80211_mesh_route *rt)
270 {
271 	TAILQ_REMOVE(&ms->ms_routes, rt, rt_next);
272 	free(rt, M_80211_MESH_RT);
273 }
274 
275 void
276 ieee80211_mesh_rt_del(struct ieee80211vap *vap,
277     const uint8_t dest[IEEE80211_ADDR_LEN])
278 {
279 	struct ieee80211_mesh_state *ms = vap->iv_mesh;
280 	struct ieee80211_mesh_route *rt, *next;
281 
282 	MESH_RT_LOCK(ms);
283 	TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) {
284 		if (IEEE80211_ADDR_EQ(rt->rt_dest, dest)) {
285 			mesh_rt_del(ms, rt);
286 			MESH_RT_UNLOCK(ms);
287 			return;
288 		}
289 	}
290 	MESH_RT_UNLOCK(ms);
291 }
292 
293 void
294 ieee80211_mesh_rt_flush(struct ieee80211vap *vap)
295 {
296 	struct ieee80211_mesh_state *ms = vap->iv_mesh;
297 	struct ieee80211_mesh_route *rt, *next;
298 
299 	if (ms == NULL)
300 		return;
301 	MESH_RT_LOCK(ms);
302 	TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next)
303 		mesh_rt_del(ms, rt);
304 	MESH_RT_UNLOCK(ms);
305 }
306 
307 void
308 ieee80211_mesh_rt_flush_peer(struct ieee80211vap *vap,
309     const uint8_t peer[IEEE80211_ADDR_LEN])
310 {
311 	struct ieee80211_mesh_state *ms = vap->iv_mesh;
312 	struct ieee80211_mesh_route *rt, *next;
313 
314 	MESH_RT_LOCK(ms);
315 	TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) {
316 		if (IEEE80211_ADDR_EQ(rt->rt_nexthop, peer))
317 			mesh_rt_del(ms, rt);
318 	}
319 	MESH_RT_UNLOCK(ms);
320 }
321 
322 /*
323  * Flush expired routing entries, i.e. those in invalid state for
324  * some time.
325  */
326 static void
327 mesh_rt_flush_invalid(struct ieee80211vap *vap)
328 {
329 	struct ieee80211_mesh_state *ms = vap->iv_mesh;
330 	struct ieee80211_mesh_route *rt, *next;
331 
332 	if (ms == NULL)
333 		return;
334 	MESH_RT_LOCK(ms);
335 	TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) {
336 		if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0 &&
337 		    ticks - rt->rt_crtime >= ms->ms_ppath->mpp_inact)
338 			mesh_rt_del(ms, rt);
339 	}
340 	MESH_RT_UNLOCK(ms);
341 }
342 
343 #define	N(a)	(sizeof(a) / sizeof(a[0]))
344 int
345 ieee80211_mesh_register_proto_path(const struct ieee80211_mesh_proto_path *mpp)
346 {
347 	int i, firstempty = -1;
348 
349 	for (i = 0; i < N(mesh_proto_paths); i++) {
350 		if (strncmp(mpp->mpp_descr, mesh_proto_paths[i].mpp_descr,
351 		    IEEE80211_MESH_PROTO_DSZ) == 0)
352 			return EEXIST;
353 		if (!mesh_proto_paths[i].mpp_active && firstempty == -1)
354 			firstempty = i;
355 	}
356 	if (firstempty < 0)
357 		return ENOSPC;
358 	memcpy(&mesh_proto_paths[firstempty], mpp, sizeof(*mpp));
359 	mesh_proto_paths[firstempty].mpp_active = 1;
360 	return 0;
361 }
362 
363 int
364 ieee80211_mesh_register_proto_metric(const struct
365     ieee80211_mesh_proto_metric *mpm)
366 {
367 	int i, firstempty = -1;
368 
369 	for (i = 0; i < N(mesh_proto_metrics); i++) {
370 		if (strncmp(mpm->mpm_descr, mesh_proto_metrics[i].mpm_descr,
371 		    IEEE80211_MESH_PROTO_DSZ) == 0)
372 			return EEXIST;
373 		if (!mesh_proto_metrics[i].mpm_active && firstempty == -1)
374 			firstempty = i;
375 	}
376 	if (firstempty < 0)
377 		return ENOSPC;
378 	memcpy(&mesh_proto_metrics[firstempty], mpm, sizeof(*mpm));
379 	mesh_proto_metrics[firstempty].mpm_active = 1;
380 	return 0;
381 }
382 
383 static int
384 mesh_select_proto_path(struct ieee80211vap *vap, const char *name)
385 {
386 	struct ieee80211_mesh_state *ms = vap->iv_mesh;
387 	int i;
388 
389 	for (i = 0; i < N(mesh_proto_paths); i++) {
390 		if (strcasecmp(mesh_proto_paths[i].mpp_descr, name) == 0) {
391 			ms->ms_ppath = &mesh_proto_paths[i];
392 			return 0;
393 		}
394 	}
395 	return ENOENT;
396 }
397 
398 static int
399 mesh_select_proto_metric(struct ieee80211vap *vap, const char *name)
400 {
401 	struct ieee80211_mesh_state *ms = vap->iv_mesh;
402 	int i;
403 
404 	for (i = 0; i < N(mesh_proto_metrics); i++) {
405 		if (strcasecmp(mesh_proto_metrics[i].mpm_descr, name) == 0) {
406 			ms->ms_pmetric = &mesh_proto_metrics[i];
407 			return 0;
408 		}
409 	}
410 	return ENOENT;
411 }
412 #undef	N
413 
414 static void
415 ieee80211_mesh_init(void)
416 {
417 
418 	memset(mesh_proto_paths, 0, sizeof(mesh_proto_paths));
419 	memset(mesh_proto_metrics, 0, sizeof(mesh_proto_metrics));
420 
421 	/*
422 	 * Setup mesh parameters that depends on the clock frequency.
423 	 */
424 	ieee80211_mesh_retrytimeout = msecs_to_ticks(40);
425 	ieee80211_mesh_holdingtimeout = msecs_to_ticks(40);
426 	ieee80211_mesh_confirmtimeout = msecs_to_ticks(40);
427 
428 	/*
429 	 * Register action frame handlers.
430 	 */
431 	ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESHPEERING,
432 	    IEEE80211_ACTION_MESHPEERING_OPEN,
433 	    mesh_recv_action_meshpeering_open);
434 	ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESHPEERING,
435 	    IEEE80211_ACTION_MESHPEERING_CONFIRM,
436 	    mesh_recv_action_meshpeering_confirm);
437 	ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESHPEERING,
438 	    IEEE80211_ACTION_MESHPEERING_CLOSE,
439 	    mesh_recv_action_meshpeering_close);
440 	ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESHLMETRIC,
441 	    IEEE80211_ACTION_MESHLMETRIC_REQ, mesh_recv_action_meshlmetric_req);
442 	ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESHLMETRIC,
443 	    IEEE80211_ACTION_MESHLMETRIC_REP, mesh_recv_action_meshlmetric_rep);
444 
445 	ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESHPEERING,
446 	    IEEE80211_ACTION_MESHPEERING_OPEN,
447 	    mesh_send_action_meshpeering_open);
448 	ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESHPEERING,
449 	    IEEE80211_ACTION_MESHPEERING_CONFIRM,
450 	    mesh_send_action_meshpeering_confirm);
451 	ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESHPEERING,
452 	    IEEE80211_ACTION_MESHPEERING_CLOSE,
453 	    mesh_send_action_meshpeering_close);
454 	ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESHLMETRIC,
455 	    IEEE80211_ACTION_MESHLMETRIC_REQ,
456 	    mesh_send_action_meshlink_request);
457 	ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESHLMETRIC,
458 	    IEEE80211_ACTION_MESHLMETRIC_REP,
459 	    mesh_send_action_meshlink_reply);
460 
461 	/*
462 	 * Register Airtime Link Metric.
463 	 */
464 	ieee80211_mesh_register_proto_metric(&mesh_metric_airtime);
465 
466 }
467 SYSINIT(wlan_mesh, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_mesh_init, NULL);
468 
469 void
470 ieee80211_mesh_attach(struct ieee80211com *ic)
471 {
472 	ic->ic_vattach[IEEE80211_M_MBSS] = mesh_vattach;
473 }
474 
475 void
476 ieee80211_mesh_detach(struct ieee80211com *ic)
477 {
478 }
479 
480 static void
481 mesh_vdetach_peers(void *arg, struct ieee80211_node *ni)
482 {
483 	struct ieee80211com *ic = ni->ni_ic;
484 	uint16_t args[3];
485 
486 	if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED) {
487 		args[0] = ni->ni_mlpid;
488 		args[1] = ni->ni_mllid;
489 		args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
490 		ieee80211_send_action(ni,
491 		    IEEE80211_ACTION_CAT_MESHPEERING,
492 		    IEEE80211_ACTION_MESHPEERING_CLOSE,
493 		    args);
494 	}
495 	callout_drain(&ni->ni_mltimer);
496 	/* XXX belongs in hwmp */
497 	ieee80211_ageq_drain_node(&ic->ic_stageq,
498 	   (void *)(uintptr_t) ieee80211_mac_hash(ic, ni->ni_macaddr));
499 }
500 
501 static void
502 mesh_vdetach(struct ieee80211vap *vap)
503 {
504 	struct ieee80211_mesh_state *ms = vap->iv_mesh;
505 
506 	callout_drain(&ms->ms_cleantimer);
507 	ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_vdetach_peers,
508 	    NULL);
509 	ieee80211_mesh_rt_flush(vap);
510 	mtx_destroy(&ms->ms_rt_lock);
511 	ms->ms_ppath->mpp_vdetach(vap);
512 	free(vap->iv_mesh, M_80211_VAP);
513 	vap->iv_mesh = NULL;
514 }
515 
516 static void
517 mesh_vattach(struct ieee80211vap *vap)
518 {
519 	struct ieee80211_mesh_state *ms;
520 	vap->iv_newstate = mesh_newstate;
521 	vap->iv_input = mesh_input;
522 	vap->iv_opdetach = mesh_vdetach;
523 	vap->iv_recv_mgmt = mesh_recv_mgmt;
524 	vap->iv_recv_ctl = mesh_recv_ctl;
525 	ms = malloc(sizeof(struct ieee80211_mesh_state), M_80211_VAP,
526 	    M_NOWAIT | M_ZERO);
527 	if (ms == NULL) {
528 		printf("%s: couldn't alloc MBSS state\n", __func__);
529 		return;
530 	}
531 	vap->iv_mesh = ms;
532 	ms->ms_seq = 0;
533 	ms->ms_flags = (IEEE80211_MESHFLAGS_AP | IEEE80211_MESHFLAGS_FWD);
534 	ms->ms_ttl = IEEE80211_MESH_DEFAULT_TTL;
535 	TAILQ_INIT(&ms->ms_routes);
536 	mtx_init(&ms->ms_rt_lock, "MBSS", "802.11s routing table", MTX_DEF);
537 	callout_init(&ms->ms_cleantimer, CALLOUT_MPSAFE);
538 	mesh_select_proto_metric(vap, "AIRTIME");
539 	KASSERT(ms->ms_pmetric, ("ms_pmetric == NULL"));
540 	mesh_select_proto_path(vap, "HWMP");
541 	KASSERT(ms->ms_ppath, ("ms_ppath == NULL"));
542 	ms->ms_ppath->mpp_vattach(vap);
543 }
544 
545 /*
546  * IEEE80211_M_MBSS vap state machine handler.
547  */
548 static int
549 mesh_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
550 {
551 	struct ieee80211_mesh_state *ms = vap->iv_mesh;
552 	struct ieee80211com *ic = vap->iv_ic;
553 	struct ieee80211_node *ni;
554 	enum ieee80211_state ostate;
555 
556 	IEEE80211_LOCK_ASSERT(ic);
557 
558 	ostate = vap->iv_state;
559 	IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n",
560 	    __func__, ieee80211_state_name[ostate],
561 	    ieee80211_state_name[nstate], arg);
562 	vap->iv_state = nstate;		/* state transition */
563 	if (ostate != IEEE80211_S_SCAN)
564 		ieee80211_cancel_scan(vap);	/* background scan */
565 	ni = vap->iv_bss;			/* NB: no reference held */
566 	if (nstate != IEEE80211_S_RUN && ostate == IEEE80211_S_RUN)
567 		callout_drain(&ms->ms_cleantimer);
568 	switch (nstate) {
569 	case IEEE80211_S_INIT:
570 		switch (ostate) {
571 		case IEEE80211_S_SCAN:
572 			ieee80211_cancel_scan(vap);
573 			break;
574 		case IEEE80211_S_CAC:
575 			ieee80211_dfs_cac_stop(vap);
576 			break;
577 		case IEEE80211_S_RUN:
578 			ieee80211_iterate_nodes(&ic->ic_sta,
579 			    mesh_vdetach_peers, NULL);
580 			break;
581 		default:
582 			break;
583 		}
584 		if (ostate != IEEE80211_S_INIT) {
585 			/* NB: optimize INIT -> INIT case */
586 			ieee80211_reset_bss(vap);
587 			ieee80211_mesh_rt_flush(vap);
588 		}
589 		break;
590 	case IEEE80211_S_SCAN:
591 		switch (ostate) {
592 		case IEEE80211_S_INIT:
593 			if (vap->iv_des_chan != IEEE80211_CHAN_ANYC &&
594 			    !IEEE80211_IS_CHAN_RADAR(vap->iv_des_chan) &&
595 			    ms->ms_idlen != 0) {
596 				/*
597 				 * Already have a channel and a mesh ID; bypass
598 				 * the scan and startup immediately.
599 				 */
600 				ieee80211_create_ibss(vap, vap->iv_des_chan);
601 				break;
602 			}
603 			/*
604 			 * Initiate a scan.  We can come here as a result
605 			 * of an IEEE80211_IOC_SCAN_REQ too in which case
606 			 * the vap will be marked with IEEE80211_FEXT_SCANREQ
607 			 * and the scan request parameters will be present
608 			 * in iv_scanreq.  Otherwise we do the default.
609 			*/
610 			if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) {
611 				ieee80211_check_scan(vap,
612 				    vap->iv_scanreq_flags,
613 				    vap->iv_scanreq_duration,
614 				    vap->iv_scanreq_mindwell,
615 				    vap->iv_scanreq_maxdwell,
616 				    vap->iv_scanreq_nssid, vap->iv_scanreq_ssid);
617 				vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ;
618 			} else
619 				ieee80211_check_scan_current(vap);
620 			break;
621 		default:
622 			break;
623 		}
624 		break;
625 	case IEEE80211_S_CAC:
626 		/*
627 		 * Start CAC on a DFS channel.  We come here when starting
628 		 * a bss on a DFS channel (see ieee80211_create_ibss).
629 		 */
630 		ieee80211_dfs_cac_start(vap);
631 		break;
632 	case IEEE80211_S_RUN:
633 		switch (ostate) {
634 		case IEEE80211_S_INIT:
635 			/*
636 			 * Already have a channel; bypass the
637 			 * scan and startup immediately.
638 			 * Note that ieee80211_create_ibss will call
639 			 * back to do a RUN->RUN state change.
640 			 */
641 			ieee80211_create_ibss(vap,
642 			    ieee80211_ht_adjust_channel(ic,
643 				ic->ic_curchan, vap->iv_flags_ht));
644 			/* NB: iv_bss is changed on return */
645 			break;
646 		case IEEE80211_S_CAC:
647 			/*
648 			 * NB: This is the normal state change when CAC
649 			 * expires and no radar was detected; no need to
650 			 * clear the CAC timer as it's already expired.
651 			 */
652 			/* fall thru... */
653 		case IEEE80211_S_CSA:
654 #if 0
655 			/*
656 			 * Shorten inactivity timer of associated stations
657 			 * to weed out sta's that don't follow a CSA.
658 			 */
659 			ieee80211_iterate_nodes(&ic->ic_sta, sta_csa, vap);
660 #endif
661 			/*
662 			 * Update bss node channel to reflect where
663 			 * we landed after CSA.
664 			 */
665 			ieee80211_node_set_chan(vap->iv_bss,
666 			    ieee80211_ht_adjust_channel(ic, ic->ic_curchan,
667 				ieee80211_htchanflags(vap->iv_bss->ni_chan)));
668 			/* XXX bypass debug msgs */
669 			break;
670 		case IEEE80211_S_SCAN:
671 		case IEEE80211_S_RUN:
672 #ifdef IEEE80211_DEBUG
673 			if (ieee80211_msg_debug(vap)) {
674 				struct ieee80211_node *ni = vap->iv_bss;
675 				ieee80211_note(vap,
676 				    "synchronized with %s meshid ",
677 				    ether_sprintf(ni->ni_meshid));
678 				ieee80211_print_essid(ni->ni_meshid,
679 				    ni->ni_meshidlen);
680 				/* XXX MCS/HT */
681 				printf(" channel %d\n",
682 				    ieee80211_chan2ieee(ic, ic->ic_curchan));
683 			}
684 #endif
685 			break;
686 		default:
687 			break;
688 		}
689 		ieee80211_node_authorize(vap->iv_bss);
690 		callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact,
691                     mesh_rt_cleanup_cb, vap);
692 		break;
693 	default:
694 		break;
695 	}
696 	/* NB: ostate not nstate */
697 	ms->ms_ppath->mpp_newstate(vap, ostate, arg);
698 	return 0;
699 }
700 
701 static void
702 mesh_rt_cleanup_cb(void *arg)
703 {
704 	struct ieee80211vap *vap = arg;
705 	struct ieee80211_mesh_state *ms = vap->iv_mesh;
706 
707 	mesh_rt_flush_invalid(vap);
708 	callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact,
709 	    mesh_rt_cleanup_cb, vap);
710 }
711 
712 
713 /*
714  * Helper function to note the Mesh Peer Link FSM change.
715  */
716 static void
717 mesh_linkchange(struct ieee80211_node *ni, enum ieee80211_mesh_mlstate state)
718 {
719 	struct ieee80211vap *vap = ni->ni_vap;
720 	struct ieee80211_mesh_state *ms = vap->iv_mesh;
721 #ifdef IEEE80211_DEBUG
722 	static const char *meshlinkstates[] = {
723 		[IEEE80211_NODE_MESH_IDLE]		= "IDLE",
724 		[IEEE80211_NODE_MESH_OPENSNT]		= "OPEN SENT",
725 		[IEEE80211_NODE_MESH_OPENRCV]		= "OPEN RECEIVED",
726 		[IEEE80211_NODE_MESH_CONFIRMRCV]	= "CONFIRM RECEIVED",
727 		[IEEE80211_NODE_MESH_ESTABLISHED]	= "ESTABLISHED",
728 		[IEEE80211_NODE_MESH_HOLDING]		= "HOLDING"
729 	};
730 #endif
731 	IEEE80211_NOTE(vap, IEEE80211_MSG_MESH,
732 	    ni, "peer link: %s -> %s",
733 	    meshlinkstates[ni->ni_mlstate], meshlinkstates[state]);
734 
735 	/* track neighbor count */
736 	if (state == IEEE80211_NODE_MESH_ESTABLISHED &&
737 	    ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) {
738 		KASSERT(ms->ms_neighbors < 65535, ("neighbor count overflow"));
739 		ms->ms_neighbors++;
740 		ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF);
741 	} else if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED &&
742 	    state != IEEE80211_NODE_MESH_ESTABLISHED) {
743 		KASSERT(ms->ms_neighbors > 0, ("neighbor count 0"));
744 		ms->ms_neighbors--;
745 		ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF);
746 	}
747 	ni->ni_mlstate = state;
748 	switch (state) {
749 	case IEEE80211_NODE_MESH_HOLDING:
750 		ms->ms_ppath->mpp_peerdown(ni);
751 		break;
752 	case IEEE80211_NODE_MESH_ESTABLISHED:
753 		ieee80211_mesh_discover(vap, ni->ni_macaddr, NULL);
754 		break;
755 	default:
756 		break;
757 	}
758 }
759 
760 /*
761  * Helper function to generate a unique local ID required for mesh
762  * peer establishment.
763  */
764 static void
765 mesh_checkid(void *arg, struct ieee80211_node *ni)
766 {
767 	uint16_t *r = arg;
768 
769 	if (*r == ni->ni_mllid)
770 		*(uint16_t *)arg = 0;
771 }
772 
773 static uint32_t
774 mesh_generateid(struct ieee80211vap *vap)
775 {
776 	int maxiter = 4;
777 	uint16_t r;
778 
779 	do {
780 		get_random_bytes(&r, 2);
781 		ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_checkid, &r);
782 		maxiter--;
783 	} while (r == 0 && maxiter > 0);
784 	return r;
785 }
786 
787 /*
788  * Verifies if we already received this packet by checking its
789  * sequence number.
790  * Returns 0 if the frame is to be accepted, 1 otherwise.
791  */
792 static int
793 mesh_checkpseq(struct ieee80211vap *vap,
794     const uint8_t source[IEEE80211_ADDR_LEN], uint32_t seq)
795 {
796 	struct ieee80211_mesh_route *rt;
797 
798 	rt = ieee80211_mesh_rt_find(vap, source);
799 	if (rt == NULL) {
800 		rt = ieee80211_mesh_rt_add(vap, source);
801 		if (rt == NULL) {
802 			IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source,
803 			    "%s", "add mcast route failed");
804 			vap->iv_stats.is_mesh_rtaddfailed++;
805 			return 1;
806 		}
807 		IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source,
808 		    "add mcast route, mesh seqno %d", seq);
809 		rt->rt_lastmseq = seq;
810 		return 0;
811 	}
812 	if (IEEE80211_MESH_SEQ_GEQ(rt->rt_lastmseq, seq)) {
813 		return 1;
814 	} else {
815 		rt->rt_lastmseq = seq;
816 		return 0;
817 	}
818 }
819 
820 /*
821  * Iterate the routing table and locate the next hop.
822  */
823 static struct ieee80211_node *
824 mesh_find_txnode(struct ieee80211vap *vap,
825     const uint8_t dest[IEEE80211_ADDR_LEN])
826 {
827 	struct ieee80211_mesh_route *rt;
828 
829 	rt = ieee80211_mesh_rt_find(vap, dest);
830 	if (rt == NULL)
831 		return NULL;
832 	if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0 ||
833 	    (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY)) {
834 		IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
835 		    "%s: !valid or proxy, flags 0x%x", __func__, rt->rt_flags);
836 		/* XXX stat */
837 		return NULL;
838 	}
839 	return ieee80211_find_txnode(vap, rt->rt_nexthop);
840 }
841 
842 /*
843  * Forward the specified frame.
844  * Decrement the TTL and set TA to our MAC address.
845  */
846 static void
847 mesh_forward(struct ieee80211vap *vap, struct mbuf *m,
848     const struct ieee80211_meshcntl *mc)
849 {
850 	struct ieee80211com *ic = vap->iv_ic;
851 	struct ieee80211_mesh_state *ms = vap->iv_mesh;
852 	struct ifnet *ifp = vap->iv_ifp;
853 	struct ifnet *parent = ic->ic_ifp;
854 	const struct ieee80211_frame *wh =
855 	    mtod(m, const struct ieee80211_frame *);
856 	struct mbuf *mcopy;
857 	struct ieee80211_meshcntl *mccopy;
858 	struct ieee80211_frame *whcopy;
859 	struct ieee80211_node *ni;
860 	int err;
861 
862 	if (mc->mc_ttl == 0) {
863 		IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
864 		    "%s", "frame not fwd'd, ttl 0");
865 		vap->iv_stats.is_mesh_fwd_ttl++;
866 		return;
867 	}
868 	if (!(ms->ms_flags & IEEE80211_MESHFLAGS_FWD)) {
869 		IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
870 		    "%s", "frame not fwd'd, fwding disabled");
871 		vap->iv_stats.is_mesh_fwd_disabled++;
872 		return;
873 	}
874 	mcopy = m_dup(m, M_DONTWAIT);
875 	if (mcopy == NULL) {
876 		IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
877 		    "%s", "frame not fwd'd, cannot dup");
878 		vap->iv_stats.is_mesh_fwd_nobuf++;
879 		ifp->if_oerrors++;
880 		return;
881 	}
882 	mcopy = m_pullup(mcopy, ieee80211_hdrspace(ic, wh) +
883 	    sizeof(struct ieee80211_meshcntl));
884 	if (mcopy == NULL) {
885 		IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
886 		    "%s", "frame not fwd'd, too short");
887 		vap->iv_stats.is_mesh_fwd_tooshort++;
888 		ifp->if_oerrors++;
889 		m_freem(mcopy);
890 		return;
891 	}
892 	whcopy = mtod(mcopy, struct ieee80211_frame *);
893 	mccopy = (struct ieee80211_meshcntl *)
894 	    (mtod(mcopy, uint8_t *) + ieee80211_hdrspace(ic, wh));
895 	/* XXX clear other bits? */
896 	whcopy->i_fc[1] &= ~IEEE80211_FC1_RETRY;
897 	IEEE80211_ADDR_COPY(whcopy->i_addr2, vap->iv_myaddr);
898 	if (IEEE80211_IS_MULTICAST(wh->i_addr1)) {
899 		ni = ieee80211_ref_node(vap->iv_bss);
900 		mcopy->m_flags |= M_MCAST;
901 	} else {
902 		ni = mesh_find_txnode(vap, whcopy->i_addr3);
903 		if (ni == NULL) {
904 			IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
905 			    "%s", "frame not fwd'd, no path");
906 			vap->iv_stats.is_mesh_fwd_nopath++;
907 			m_freem(mcopy);
908 			return;
909 		}
910 		IEEE80211_ADDR_COPY(whcopy->i_addr1, ni->ni_macaddr);
911 	}
912 	KASSERT(mccopy->mc_ttl > 0, ("%s called with wrong ttl", __func__));
913 	mccopy->mc_ttl--;
914 
915 	/* XXX calculate priority so drivers can find the tx queue */
916 	M_WME_SETAC(mcopy, WME_AC_BE);
917 
918 	/* XXX do we know m_nextpkt is NULL? */
919 	mcopy->m_pkthdr.rcvif = (void *) ni;
920 	err = parent->if_transmit(parent, mcopy);
921 	if (err != 0) {
922 		/* NB: IFQ_HANDOFF reclaims mbuf */
923 		ieee80211_free_node(ni);
924 	} else {
925 		ifp->if_opackets++;
926 	}
927 }
928 
929 static struct mbuf *
930 mesh_decap(struct ieee80211vap *vap, struct mbuf *m, int hdrlen, int meshdrlen)
931 {
932 #define	WHDIR(wh) ((wh)->i_fc[1] & IEEE80211_FC1_DIR_MASK)
933 	uint8_t b[sizeof(struct ieee80211_qosframe_addr4) +
934 		  sizeof(struct ieee80211_meshcntl_ae11)];
935 	const struct ieee80211_qosframe_addr4 *wh;
936 	const struct ieee80211_meshcntl_ae10 *mc;
937 	struct ether_header *eh;
938 	struct llc *llc;
939 	int ae;
940 
941 	if (m->m_len < hdrlen + sizeof(*llc) &&
942 	    (m = m_pullup(m, hdrlen + sizeof(*llc))) == NULL) {
943 		IEEE80211_DPRINTF(vap, IEEE80211_MSG_ANY,
944 		    "discard data frame: %s", "m_pullup failed");
945 		vap->iv_stats.is_rx_tooshort++;
946 		return NULL;
947 	}
948 	memcpy(b, mtod(m, caddr_t), hdrlen);
949 	wh = (const struct ieee80211_qosframe_addr4 *)&b[0];
950 	mc = (const struct ieee80211_meshcntl_ae10 *)&b[hdrlen - meshdrlen];
951 	KASSERT(WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS ||
952 		WHDIR(wh) == IEEE80211_FC1_DIR_DSTODS,
953 	    ("bogus dir, fc 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1]));
954 
955 	llc = (struct llc *)(mtod(m, caddr_t) + hdrlen);
956 	if (llc->llc_dsap == LLC_SNAP_LSAP && llc->llc_ssap == LLC_SNAP_LSAP &&
957 	    llc->llc_control == LLC_UI && llc->llc_snap.org_code[0] == 0 &&
958 	    llc->llc_snap.org_code[1] == 0 && llc->llc_snap.org_code[2] == 0 &&
959 	    /* NB: preserve AppleTalk frames that have a native SNAP hdr */
960 	    !(llc->llc_snap.ether_type == htons(ETHERTYPE_AARP) ||
961 	      llc->llc_snap.ether_type == htons(ETHERTYPE_IPX))) {
962 		m_adj(m, hdrlen + sizeof(struct llc) - sizeof(*eh));
963 		llc = NULL;
964 	} else {
965 		m_adj(m, hdrlen - sizeof(*eh));
966 	}
967 	eh = mtod(m, struct ether_header *);
968 	ae = mc->mc_flags & 3;
969 	if (WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS) {
970 		IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr1);
971 		if (ae == 0) {
972 			IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr3);
973 		} else if (ae == 1) {
974 			IEEE80211_ADDR_COPY(eh->ether_shost, mc->mc_addr4);
975 		} else {
976 			IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
977 			    (const struct ieee80211_frame *)wh, NULL,
978 			    "bad AE %d", ae);
979 			vap->iv_stats.is_mesh_badae++;
980 			m_freem(m);
981 			return NULL;
982 		}
983 	} else {
984 		if (ae == 0) {
985 			IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr3);
986 			IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr4);
987 		} else if (ae == 2) {
988 			IEEE80211_ADDR_COPY(eh->ether_dhost, mc->mc_addr4);
989 			IEEE80211_ADDR_COPY(eh->ether_shost, mc->mc_addr5);
990 		} else {
991 			IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
992 			    (const struct ieee80211_frame *)wh, NULL,
993 			    "bad AE %d", ae);
994 			vap->iv_stats.is_mesh_badae++;
995 			m_freem(m);
996 			return NULL;
997 		}
998 	}
999 #ifdef ALIGNED_POINTER
1000 	if (!ALIGNED_POINTER(mtod(m, caddr_t) + sizeof(*eh), uint32_t)) {
1001 		m = ieee80211_realign(vap, m, sizeof(*eh));
1002 		if (m == NULL)
1003 			return NULL;
1004 	}
1005 #endif /* ALIGNED_POINTER */
1006 	if (llc != NULL) {
1007 		eh = mtod(m, struct ether_header *);
1008 		eh->ether_type = htons(m->m_pkthdr.len - sizeof(*eh));
1009 	}
1010 	return m;
1011 #undef WDIR
1012 }
1013 
1014 /*
1015  * Return non-zero if the unicast mesh data frame should be processed
1016  * locally.  Frames that are not proxy'd have our address, otherwise
1017  * we need to consult the routing table to look for a proxy entry.
1018  */
1019 static __inline int
1020 mesh_isucastforme(struct ieee80211vap *vap, const struct ieee80211_frame *wh,
1021     const struct ieee80211_meshcntl *mc)
1022 {
1023 	int ae = mc->mc_flags & 3;
1024 
1025 	KASSERT((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) == IEEE80211_FC1_DIR_DSTODS,
1026 	    ("bad dir 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1]));
1027 	KASSERT(ae == 0 || ae == 2, ("bad AE %d", ae));
1028 	if (ae == 2) {				/* ucast w/ proxy */
1029 		const struct ieee80211_meshcntl_ae10 *mc10 =
1030 		    (const struct ieee80211_meshcntl_ae10 *) mc;
1031 		struct ieee80211_mesh_route *rt =
1032 		    ieee80211_mesh_rt_find(vap, mc10->mc_addr4);
1033 		/* check for proxy route to ourself */
1034 		return (rt != NULL &&
1035 		    (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY));
1036 	} else					/* ucast w/o proxy */
1037 		return IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_myaddr);
1038 }
1039 
1040 static int
1041 mesh_input(struct ieee80211_node *ni, struct mbuf *m, int rssi, int nf)
1042 {
1043 #define	HAS_SEQ(type)	((type & 0x4) == 0)
1044 	struct ieee80211vap *vap = ni->ni_vap;
1045 	struct ieee80211com *ic = ni->ni_ic;
1046 	struct ifnet *ifp = vap->iv_ifp;
1047 	struct ieee80211_frame *wh;
1048 	const struct ieee80211_meshcntl *mc;
1049 	int hdrspace, meshdrlen, need_tap;
1050 	uint8_t dir, type, subtype, qos;
1051 	uint32_t seq;
1052 	uint8_t *addr;
1053 	ieee80211_seq rxseq;
1054 
1055 	KASSERT(ni != NULL, ("null node"));
1056 	ni->ni_inact = ni->ni_inact_reload;
1057 
1058 	need_tap = 1;			/* mbuf need to be tapped. */
1059 	type = -1;			/* undefined */
1060 
1061 	if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) {
1062 		IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1063 		    ni->ni_macaddr, NULL,
1064 		    "too short (1): len %u", m->m_pkthdr.len);
1065 		vap->iv_stats.is_rx_tooshort++;
1066 		goto out;
1067 	}
1068 	/*
1069 	 * Bit of a cheat here, we use a pointer for a 3-address
1070 	 * frame format but don't reference fields past outside
1071 	 * ieee80211_frame_min w/o first validating the data is
1072 	 * present.
1073 	*/
1074 	wh = mtod(m, struct ieee80211_frame *);
1075 
1076 	if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) !=
1077 	    IEEE80211_FC0_VERSION_0) {
1078 		IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1079 		    ni->ni_macaddr, NULL, "wrong version %x", wh->i_fc[0]);
1080 		vap->iv_stats.is_rx_badversion++;
1081 		goto err;
1082 	}
1083 	dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK;
1084 	type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK;
1085 	subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK;
1086 	if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) {
1087 		IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi);
1088 		ni->ni_noise = nf;
1089 		if (HAS_SEQ(type)) {
1090 			uint8_t tid = ieee80211_gettid(wh);
1091 
1092 			if (IEEE80211_QOS_HAS_SEQ(wh) &&
1093 			    TID_TO_WME_AC(tid) >= WME_AC_VI)
1094 				ic->ic_wme.wme_hipri_traffic++;
1095 			rxseq = le16toh(*(uint16_t *)wh->i_seq);
1096 			if (! ieee80211_check_rxseq(ni, wh)) {
1097 				/* duplicate, discard */
1098 				IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
1099 				    wh->i_addr1, "duplicate",
1100 				    "seqno <%u,%u> fragno <%u,%u> tid %u",
1101 				    rxseq >> IEEE80211_SEQ_SEQ_SHIFT,
1102 				    ni->ni_rxseqs[tid] >>
1103 				    IEEE80211_SEQ_SEQ_SHIFT,
1104 				    rxseq & IEEE80211_SEQ_FRAG_MASK,
1105 				    ni->ni_rxseqs[tid] &
1106 				    IEEE80211_SEQ_FRAG_MASK,
1107 				    tid);
1108 				vap->iv_stats.is_rx_dup++;
1109 				IEEE80211_NODE_STAT(ni, rx_dup);
1110 				goto out;
1111 			}
1112 			ni->ni_rxseqs[tid] = rxseq;
1113 		}
1114 	}
1115 #ifdef IEEE80211_DEBUG
1116 	/*
1117 	 * It's easier, but too expensive, to simulate different mesh
1118 	 * topologies by consulting the ACL policy very early, so do this
1119 	 * only under DEBUG.
1120 	 *
1121 	 * NB: this check is also done upon peering link initiation.
1122 	 */
1123 	if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) {
1124 		IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL,
1125 		    wh, NULL, "%s", "disallowed by ACL");
1126 		vap->iv_stats.is_rx_acl++;
1127 		goto out;
1128 	}
1129 #endif
1130 	switch (type) {
1131 	case IEEE80211_FC0_TYPE_DATA:
1132 		if (ni == vap->iv_bss)
1133 			goto out;
1134 		if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) {
1135 			IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
1136 			    ni->ni_macaddr, NULL,
1137 			    "peer link not yet established (%d)",
1138 			    ni->ni_mlstate);
1139 			vap->iv_stats.is_mesh_nolink++;
1140 			goto out;
1141 		}
1142 		if (dir != IEEE80211_FC1_DIR_FROMDS &&
1143 		    dir != IEEE80211_FC1_DIR_DSTODS) {
1144 			IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1145 			    wh, "data", "incorrect dir 0x%x", dir);
1146 			vap->iv_stats.is_rx_wrongdir++;
1147 			goto err;
1148 		}
1149 		/* pull up enough to get to the mesh control */
1150 		hdrspace = ieee80211_hdrspace(ic, wh);
1151 		if (m->m_len < hdrspace + sizeof(struct ieee80211_meshcntl) &&
1152 		    (m = m_pullup(m, hdrspace +
1153 		        sizeof(struct ieee80211_meshcntl))) == NULL) {
1154 			IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1155 			    ni->ni_macaddr, NULL,
1156 			    "data too short: expecting %u", hdrspace);
1157 			vap->iv_stats.is_rx_tooshort++;
1158 			goto out;		/* XXX */
1159 		}
1160 		/*
1161 		 * Now calculate the full extent of the headers. Note
1162 		 * mesh_decap will pull up anything we didn't get
1163 		 * above when it strips the 802.11 headers.
1164 		 */
1165 		mc = (const struct ieee80211_meshcntl *)
1166 		    (mtod(m, const uint8_t *) + hdrspace);
1167 		meshdrlen = sizeof(struct ieee80211_meshcntl) +
1168 		    (mc->mc_flags & 3) * IEEE80211_ADDR_LEN;
1169 		hdrspace += meshdrlen;
1170 		seq = LE_READ_4(mc->mc_seq);
1171 		if (IEEE80211_IS_MULTICAST(wh->i_addr1))
1172 			addr = wh->i_addr3;
1173 		else
1174 			addr = ((struct ieee80211_qosframe_addr4 *)wh)->i_addr4;
1175 		if (IEEE80211_ADDR_EQ(vap->iv_myaddr, addr)) {
1176 			IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
1177 			    addr, "data", "%s", "not to me");
1178 			vap->iv_stats.is_rx_wrongbss++;	/* XXX kinda */
1179 			goto out;
1180 		}
1181 		if (mesh_checkpseq(vap, addr, seq) != 0) {
1182 			vap->iv_stats.is_rx_dup++;
1183 			goto out;
1184 		}
1185 
1186 		/*
1187 		 * Potentially forward packet.  See table s36 (p140)
1188 		 * for the rules.  XXX tap fwd'd packets not for us?
1189 		 */
1190 		if (dir == IEEE80211_FC1_DIR_FROMDS ||
1191 		    !mesh_isucastforme(vap, wh, mc)) {
1192 			mesh_forward(vap, m, mc);
1193 			if (dir == IEEE80211_FC1_DIR_DSTODS)
1194 				goto out;
1195 			/* NB: fall thru to deliver mcast frames locally */
1196 		}
1197 
1198 		/*
1199 		 * Save QoS bits for use below--before we strip the header.
1200 		 */
1201 		if (subtype == IEEE80211_FC0_SUBTYPE_QOS) {
1202 			qos = (dir == IEEE80211_FC1_DIR_DSTODS) ?
1203 			    ((struct ieee80211_qosframe_addr4 *)wh)->i_qos[0] :
1204 			    ((struct ieee80211_qosframe *)wh)->i_qos[0];
1205 		} else
1206 			qos = 0;
1207 		/*
1208 		 * Next up, any fragmentation.
1209 		 */
1210 		if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1211 			m = ieee80211_defrag(ni, m, hdrspace);
1212 			if (m == NULL) {
1213 				/* Fragment dropped or frame not complete yet */
1214 				goto out;
1215 			}
1216 		}
1217 		wh = NULL;		/* no longer valid, catch any uses */
1218 
1219 		if (ieee80211_radiotap_active_vap(vap))
1220 			ieee80211_radiotap_rx(vap, m);
1221 		need_tap = 0;
1222 
1223 		/*
1224 		 * Finally, strip the 802.11 header.
1225 		 */
1226 		m = mesh_decap(vap, m, hdrspace, meshdrlen);
1227 		if (m == NULL) {
1228 			/* XXX mask bit to check for both */
1229 			/* don't count Null data frames as errors */
1230 			if (subtype == IEEE80211_FC0_SUBTYPE_NODATA ||
1231 			    subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL)
1232 				goto out;
1233 			IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
1234 			    ni->ni_macaddr, "data", "%s", "decap error");
1235 			vap->iv_stats.is_rx_decap++;
1236 			IEEE80211_NODE_STAT(ni, rx_decap);
1237 			goto err;
1238 		}
1239 		if (qos & IEEE80211_QOS_AMSDU) {
1240 			m = ieee80211_decap_amsdu(ni, m);
1241 			if (m == NULL)
1242 				return IEEE80211_FC0_TYPE_DATA;
1243 		}
1244 		ieee80211_deliver_data(vap, ni, m);
1245 		return type;
1246 	case IEEE80211_FC0_TYPE_MGT:
1247 		vap->iv_stats.is_rx_mgmt++;
1248 		IEEE80211_NODE_STAT(ni, rx_mgmt);
1249 		if (dir != IEEE80211_FC1_DIR_NODS) {
1250 			IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1251 			    wh, "mgt", "incorrect dir 0x%x", dir);
1252 			vap->iv_stats.is_rx_wrongdir++;
1253 			goto err;
1254 		}
1255 		if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) {
1256 			IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1257 			    ni->ni_macaddr, "mgt", "too short: len %u",
1258 			    m->m_pkthdr.len);
1259 			vap->iv_stats.is_rx_tooshort++;
1260 			goto out;
1261 		}
1262 #ifdef IEEE80211_DEBUG
1263 		if ((ieee80211_msg_debug(vap) &&
1264 		    (vap->iv_ic->ic_flags & IEEE80211_F_SCAN)) ||
1265 		    ieee80211_msg_dumppkts(vap)) {
1266 			if_printf(ifp, "received %s from %s rssi %d\n",
1267 			    ieee80211_mgt_subtype_name[subtype >>
1268 			    IEEE80211_FC0_SUBTYPE_SHIFT],
1269 			    ether_sprintf(wh->i_addr2), rssi);
1270 		}
1271 #endif
1272 		if (wh->i_fc[1] & IEEE80211_FC1_WEP) {
1273 			IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1274 			    wh, NULL, "%s", "WEP set but not permitted");
1275 			vap->iv_stats.is_rx_mgtdiscard++; /* XXX */
1276 			goto out;
1277 		}
1278 		vap->iv_recv_mgmt(ni, m, subtype, rssi, nf);
1279 		goto out;
1280 	case IEEE80211_FC0_TYPE_CTL:
1281 		vap->iv_stats.is_rx_ctl++;
1282 		IEEE80211_NODE_STAT(ni, rx_ctrl);
1283 		goto out;
1284 	default:
1285 		IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1286 		    wh, "bad", "frame type 0x%x", type);
1287 		/* should not come here */
1288 		break;
1289 	}
1290 err:
1291 	ifp->if_ierrors++;
1292 out:
1293 	if (m != NULL) {
1294 		if (need_tap && ieee80211_radiotap_active_vap(vap))
1295 			ieee80211_radiotap_rx(vap, m);
1296 		m_freem(m);
1297 	}
1298 	return type;
1299 }
1300 
1301 static void
1302 mesh_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, int subtype,
1303     int rssi, int nf)
1304 {
1305 	struct ieee80211vap *vap = ni->ni_vap;
1306 	struct ieee80211_mesh_state *ms = vap->iv_mesh;
1307 	struct ieee80211com *ic = ni->ni_ic;
1308 	struct ieee80211_frame *wh;
1309 	uint8_t *frm, *efrm;
1310 
1311 	wh = mtod(m0, struct ieee80211_frame *);
1312 	frm = (uint8_t *)&wh[1];
1313 	efrm = mtod(m0, uint8_t *) + m0->m_len;
1314 	switch (subtype) {
1315 	case IEEE80211_FC0_SUBTYPE_PROBE_RESP:
1316 	case IEEE80211_FC0_SUBTYPE_BEACON:
1317 	{
1318 		struct ieee80211_scanparams scan;
1319 		/*
1320 		 * We process beacon/probe response
1321 		 * frames to discover neighbors.
1322 		 */
1323 		if (ieee80211_parse_beacon(ni, m0, &scan) != 0)
1324 			return;
1325 		/*
1326 		 * Count frame now that we know it's to be processed.
1327 		 */
1328 		if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) {
1329 			vap->iv_stats.is_rx_beacon++;	/* XXX remove */
1330 			IEEE80211_NODE_STAT(ni, rx_beacons);
1331 		} else
1332 			IEEE80211_NODE_STAT(ni, rx_proberesp);
1333 		/*
1334 		 * If scanning, just pass information to the scan module.
1335 		 */
1336 		if (ic->ic_flags & IEEE80211_F_SCAN) {
1337 			if (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN) {
1338 				/*
1339 				 * Actively scanning a channel marked passive;
1340 				 * send a probe request now that we know there
1341 				 * is 802.11 traffic present.
1342 				 *
1343 				 * XXX check if the beacon we recv'd gives
1344 				 * us what we need and suppress the probe req
1345 				 */
1346 				ieee80211_probe_curchan(vap, 1);
1347 				ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN;
1348 			}
1349 			ieee80211_add_scan(vap, &scan, wh,
1350 			    subtype, rssi, nf);
1351 			return;
1352 		}
1353 
1354 		/* The rest of this code assumes we are running */
1355 		if (vap->iv_state != IEEE80211_S_RUN)
1356 			return;
1357 		/*
1358 		 * Ignore non-mesh STAs.
1359 		 */
1360 		if ((scan.capinfo &
1361 		     (IEEE80211_CAPINFO_ESS|IEEE80211_CAPINFO_IBSS)) ||
1362 		    scan.meshid == NULL || scan.meshconf == NULL) {
1363 			IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1364 			    wh, "beacon", "%s", "not a mesh sta");
1365 			vap->iv_stats.is_mesh_wrongmesh++;
1366 			return;
1367 		}
1368 		/*
1369 		 * Ignore STAs for other mesh networks.
1370 		 */
1371 		if (memcmp(scan.meshid+2, ms->ms_id, ms->ms_idlen) != 0 ||
1372 		    mesh_verify_meshconf(vap, scan.meshconf)) {
1373 			IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1374 			    wh, "beacon", "%s", "not for our mesh");
1375 			vap->iv_stats.is_mesh_wrongmesh++;
1376 			return;
1377 		}
1378 		/*
1379 		 * Peer only based on the current ACL policy.
1380 		 */
1381 		if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) {
1382 			IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL,
1383 			    wh, NULL, "%s", "disallowed by ACL");
1384 			vap->iv_stats.is_rx_acl++;
1385 			return;
1386 		}
1387 		/*
1388 		 * Do neighbor discovery.
1389 		 */
1390 		if (!IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_macaddr)) {
1391 			/*
1392 			 * Create a new entry in the neighbor table.
1393 			 */
1394 			ni = ieee80211_add_neighbor(vap, wh, &scan);
1395 		}
1396 		/*
1397 		 * Automatically peer with discovered nodes if possible.
1398 		 * XXX backoff on repeated failure
1399 		 */
1400 		if (ni != vap->iv_bss &&
1401 		    (ms->ms_flags & IEEE80211_MESHFLAGS_AP) &&
1402 		    ni->ni_mlstate == IEEE80211_NODE_MESH_IDLE) {
1403 			uint16_t args[1];
1404 
1405 			ni->ni_mlpid = mesh_generateid(vap);
1406 			if (ni->ni_mlpid == 0)
1407 				return;
1408 			mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENSNT);
1409 			args[0] = ni->ni_mlpid;
1410 			ieee80211_send_action(ni,
1411 			    IEEE80211_ACTION_CAT_MESHPEERING,
1412 			    IEEE80211_ACTION_MESHPEERING_OPEN, args);
1413 			ni->ni_mlrcnt = 0;
1414 			mesh_peer_timeout_setup(ni);
1415 		}
1416 		break;
1417 	}
1418 	case IEEE80211_FC0_SUBTYPE_PROBE_REQ:
1419 	{
1420 		uint8_t *ssid, *meshid, *rates, *xrates;
1421 		uint8_t *sfrm;
1422 
1423 		if (vap->iv_state != IEEE80211_S_RUN) {
1424 			IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1425 			    wh, NULL, "wrong state %s",
1426 			    ieee80211_state_name[vap->iv_state]);
1427 			vap->iv_stats.is_rx_mgtdiscard++;
1428 			return;
1429 		}
1430 		if (IEEE80211_IS_MULTICAST(wh->i_addr2)) {
1431 			/* frame must be directed */
1432 			IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1433 			    wh, NULL, "%s", "not unicast");
1434 			vap->iv_stats.is_rx_mgtdiscard++;	/* XXX stat */
1435 			return;
1436 		}
1437 		/*
1438 		 * prreq frame format
1439 		 *      [tlv] ssid
1440 		 *      [tlv] supported rates
1441 		 *      [tlv] extended supported rates
1442 		 *	[tlv] mesh id
1443 		 */
1444 		ssid = meshid = rates = xrates = NULL;
1445 		sfrm = frm;
1446 		while (efrm - frm > 1) {
1447 			IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return);
1448 			switch (*frm) {
1449 			case IEEE80211_ELEMID_SSID:
1450 				ssid = frm;
1451 				break;
1452 			case IEEE80211_ELEMID_RATES:
1453 				rates = frm;
1454 				break;
1455 			case IEEE80211_ELEMID_XRATES:
1456 				xrates = frm;
1457 				break;
1458 			case IEEE80211_ELEMID_MESHID:
1459 				meshid = frm;
1460 				break;
1461 			}
1462 			frm += frm[1] + 2;
1463 		}
1464 		IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return);
1465 		IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return);
1466 		if (xrates != NULL)
1467 			IEEE80211_VERIFY_ELEMENT(xrates,
1468 			    IEEE80211_RATE_MAXSIZE - rates[1], return);
1469 		if (meshid != NULL) {
1470 			IEEE80211_VERIFY_ELEMENT(meshid,
1471 			    IEEE80211_MESHID_LEN, return);
1472 			/* NB: meshid, not ssid */
1473 			IEEE80211_VERIFY_SSID(vap->iv_bss, meshid, return);
1474 		}
1475 
1476 		/* XXX find a better class or define it's own */
1477 		IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_INPUT, wh->i_addr2,
1478 		    "%s", "recv probe req");
1479 		/*
1480 		 * Some legacy 11b clients cannot hack a complete
1481 		 * probe response frame.  When the request includes
1482 		 * only a bare-bones rate set, communicate this to
1483 		 * the transmit side.
1484 		 */
1485 		ieee80211_send_proberesp(vap, wh->i_addr2, 0);
1486 		break;
1487 	}
1488 
1489 	case IEEE80211_FC0_SUBTYPE_ACTION:
1490 	case IEEE80211_FC0_SUBTYPE_ACTION_NOACK:
1491 		if (ni == vap->iv_bss) {
1492 			IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1493 			    wh, NULL, "%s", "unknown node");
1494 			vap->iv_stats.is_rx_mgtdiscard++;
1495 		} else if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) &&
1496 		    !IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1497 			IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1498 			    wh, NULL, "%s", "not for us");
1499 			vap->iv_stats.is_rx_mgtdiscard++;
1500 		} else if (vap->iv_state != IEEE80211_S_RUN) {
1501 			IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1502 			    wh, NULL, "wrong state %s",
1503 			    ieee80211_state_name[vap->iv_state]);
1504 			vap->iv_stats.is_rx_mgtdiscard++;
1505 		} else {
1506 			if (ieee80211_parse_action(ni, m0) == 0)
1507 				(void)ic->ic_recv_action(ni, wh, frm, efrm);
1508 		}
1509 		break;
1510 
1511 	case IEEE80211_FC0_SUBTYPE_ASSOC_REQ:
1512 	case IEEE80211_FC0_SUBTYPE_ASSOC_RESP:
1513 	case IEEE80211_FC0_SUBTYPE_REASSOC_REQ:
1514 	case IEEE80211_FC0_SUBTYPE_REASSOC_RESP:
1515 	case IEEE80211_FC0_SUBTYPE_ATIM:
1516 	case IEEE80211_FC0_SUBTYPE_DISASSOC:
1517 	case IEEE80211_FC0_SUBTYPE_AUTH:
1518 	case IEEE80211_FC0_SUBTYPE_DEAUTH:
1519 		IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1520 		    wh, NULL, "%s", "not handled");
1521 		vap->iv_stats.is_rx_mgtdiscard++;
1522 		break;
1523 
1524 	default:
1525 		IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1526 		    wh, "mgt", "subtype 0x%x not handled", subtype);
1527 		vap->iv_stats.is_rx_badsubtype++;
1528 		break;
1529 	}
1530 }
1531 
1532 static void
1533 mesh_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype)
1534 {
1535 
1536 	switch (subtype) {
1537 	case IEEE80211_FC0_SUBTYPE_BAR:
1538 		ieee80211_recv_bar(ni, m);
1539 		break;
1540 	}
1541 }
1542 
1543 /*
1544  * Parse meshpeering action ie's for open+confirm frames; the
1545  * important bits are returned in the supplied structure.
1546  */
1547 static const struct ieee80211_meshpeer_ie *
1548 mesh_parse_meshpeering_action(struct ieee80211_node *ni,
1549 	const struct ieee80211_frame *wh,	/* XXX for VERIFY_LENGTH */
1550 	const uint8_t *frm, const uint8_t *efrm,
1551 	struct ieee80211_meshpeer_ie *mp, uint8_t subtype)
1552 {
1553 	struct ieee80211vap *vap = ni->ni_vap;
1554 	const struct ieee80211_meshpeer_ie *mpie;
1555 	const uint8_t *meshid, *meshconf, *meshpeer;
1556 
1557 	meshid = meshconf = meshpeer = NULL;
1558 	while (efrm - frm > 1) {
1559 		IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return NULL);
1560 		switch (*frm) {
1561 		case IEEE80211_ELEMID_MESHID:
1562 			meshid = frm;
1563 			break;
1564 		case IEEE80211_ELEMID_MESHCONF:
1565 			meshconf = frm;
1566 			break;
1567 		case IEEE80211_ELEMID_MESHPEER:
1568 			meshpeer = frm;
1569 			mpie = (const struct ieee80211_meshpeer_ie *) frm;
1570 			memset(mp, 0, sizeof(*mp));
1571 			mp->peer_llinkid = LE_READ_2(&mpie->peer_llinkid);
1572 			/* NB: peer link ID is optional on these frames */
1573 			if (subtype == IEEE80211_MESH_PEER_LINK_CLOSE &&
1574 			    mpie->peer_len == 8) {
1575 				mp->peer_linkid = 0;
1576 				mp->peer_rcode = LE_READ_2(&mpie->peer_linkid);
1577 			} else {
1578 				mp->peer_linkid = LE_READ_2(&mpie->peer_linkid);
1579 				mp->peer_rcode = LE_READ_2(&mpie->peer_rcode);
1580 			}
1581 			break;
1582 		}
1583 		frm += frm[1] + 2;
1584 	}
1585 
1586 	/*
1587 	 * Verify the contents of the frame. Action frames with
1588 	 * close subtype don't have a Mesh Configuration IE.
1589 	 * If if fails validation, close the peer link.
1590 	 */
1591 	KASSERT(meshpeer != NULL &&
1592 	    subtype != IEEE80211_ACTION_MESHPEERING_CLOSE,
1593 	    ("parsing close action"));
1594 
1595 	if (mesh_verify_meshid(vap, meshid) ||
1596 	    mesh_verify_meshpeer(vap, subtype, meshpeer) ||
1597 	    mesh_verify_meshconf(vap, meshconf)) {
1598 		uint16_t args[3];
1599 
1600 		IEEE80211_DISCARD(vap,
1601 		    IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
1602 		    wh, NULL, "%s", "not for our mesh");
1603 		vap->iv_stats.is_rx_mgtdiscard++;
1604 		switch (ni->ni_mlstate) {
1605 		case IEEE80211_NODE_MESH_IDLE:
1606 		case IEEE80211_NODE_MESH_ESTABLISHED:
1607 		case IEEE80211_NODE_MESH_HOLDING:
1608 			/* ignore */
1609 			break;
1610 		case IEEE80211_NODE_MESH_OPENSNT:
1611 		case IEEE80211_NODE_MESH_OPENRCV:
1612 		case IEEE80211_NODE_MESH_CONFIRMRCV:
1613 			args[0] = ni->ni_mlpid;
1614 			args[1] = ni->ni_mllid;
1615 			args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
1616 			ieee80211_send_action(ni,
1617 			    IEEE80211_ACTION_CAT_MESHPEERING,
1618 			    IEEE80211_ACTION_MESHPEERING_CLOSE,
1619 			    args);
1620 			mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
1621 			mesh_peer_timeout_setup(ni);
1622 			break;
1623 		}
1624 		return NULL;
1625 	}
1626 	return (const struct ieee80211_meshpeer_ie *) mp;
1627 }
1628 
1629 static int
1630 mesh_recv_action_meshpeering_open(struct ieee80211_node *ni,
1631 	const struct ieee80211_frame *wh,
1632 	const uint8_t *frm, const uint8_t *efrm)
1633 {
1634 	struct ieee80211vap *vap = ni->ni_vap;
1635 	struct ieee80211_meshpeer_ie ie;
1636 	const struct ieee80211_meshpeer_ie *meshpeer;
1637 	uint16_t args[3];
1638 
1639 	/* +2+2 for action + code + capabilites */
1640 	meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2, efrm, &ie,
1641 	    IEEE80211_ACTION_MESHPEERING_OPEN);
1642 	if (meshpeer == NULL) {
1643 		return 0;
1644 	}
1645 
1646 	/* XXX move up */
1647 	IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
1648 	    "recv PEER OPEN, lid 0x%x", meshpeer->peer_llinkid);
1649 
1650 	switch (ni->ni_mlstate) {
1651 	case IEEE80211_NODE_MESH_IDLE:
1652 		mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV);
1653 		ni->ni_mllid = meshpeer->peer_llinkid;
1654 		ni->ni_mlpid = mesh_generateid(vap);
1655 		if (ni->ni_mlpid == 0)
1656 			return 0;		/* XXX */
1657 		args[0] = ni->ni_mlpid;
1658 		/* Announce we're open too... */
1659 		ieee80211_send_action(ni,
1660 		    IEEE80211_ACTION_CAT_MESHPEERING,
1661 		    IEEE80211_ACTION_MESHPEERING_OPEN, args);
1662 		/* ...and confirm the link. */
1663 		args[0] = ni->ni_mlpid;
1664 		args[1] = ni->ni_mllid;
1665 		ieee80211_send_action(ni,
1666 		    IEEE80211_ACTION_CAT_MESHPEERING,
1667 		    IEEE80211_ACTION_MESHPEERING_CONFIRM,
1668 		    args);
1669 		mesh_peer_timeout_setup(ni);
1670 		break;
1671 	case IEEE80211_NODE_MESH_OPENRCV:
1672 		/* Wrong Link ID */
1673 		if (ni->ni_mllid != meshpeer->peer_llinkid) {
1674 			args[0] = ni->ni_mllid;
1675 			args[1] = ni->ni_mlpid;
1676 			args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
1677 			ieee80211_send_action(ni,
1678 			    IEEE80211_ACTION_CAT_MESHPEERING,
1679 			    IEEE80211_ACTION_MESHPEERING_CLOSE,
1680 			    args);
1681 			mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
1682 			mesh_peer_timeout_setup(ni);
1683 			break;
1684 		}
1685 		/* Duplicate open, confirm again. */
1686 		args[0] = ni->ni_mlpid;
1687 		args[1] = ni->ni_mllid;
1688 		ieee80211_send_action(ni,
1689 		    IEEE80211_ACTION_CAT_MESHPEERING,
1690 		    IEEE80211_ACTION_MESHPEERING_CONFIRM,
1691 		    args);
1692 		break;
1693 	case IEEE80211_NODE_MESH_OPENSNT:
1694 		ni->ni_mllid = meshpeer->peer_llinkid;
1695 		mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV);
1696 		args[0] = ni->ni_mlpid;
1697 		args[1] = ni->ni_mllid;
1698 		ieee80211_send_action(ni,
1699 		    IEEE80211_ACTION_CAT_MESHPEERING,
1700 		    IEEE80211_ACTION_MESHPEERING_CONFIRM,
1701 		    args);
1702 		/* NB: don't setup/clear any timeout */
1703 		break;
1704 	case IEEE80211_NODE_MESH_CONFIRMRCV:
1705 		if (ni->ni_mlpid != meshpeer->peer_linkid ||
1706 		    ni->ni_mllid != meshpeer->peer_llinkid) {
1707 			args[0] = ni->ni_mlpid;
1708 			args[1] = ni->ni_mllid;
1709 			args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
1710 			ieee80211_send_action(ni,
1711 			    IEEE80211_ACTION_CAT_MESHPEERING,
1712 			    IEEE80211_ACTION_MESHPEERING_CLOSE,
1713 			    args);
1714 			mesh_linkchange(ni,
1715 			    IEEE80211_NODE_MESH_HOLDING);
1716 			mesh_peer_timeout_setup(ni);
1717 			break;
1718 		}
1719 		mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED);
1720 		ni->ni_mllid = meshpeer->peer_llinkid;
1721 		args[0] = ni->ni_mlpid;
1722 		args[1] = ni->ni_mllid;
1723 		ieee80211_send_action(ni,
1724 		    IEEE80211_ACTION_CAT_MESHPEERING,
1725 		    IEEE80211_ACTION_MESHPEERING_CONFIRM,
1726 		    args);
1727 		mesh_peer_timeout_stop(ni);
1728 		break;
1729 	case IEEE80211_NODE_MESH_ESTABLISHED:
1730 		if (ni->ni_mllid != meshpeer->peer_llinkid) {
1731 			args[0] = ni->ni_mllid;
1732 			args[1] = ni->ni_mlpid;
1733 			args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
1734 			ieee80211_send_action(ni,
1735 			    IEEE80211_ACTION_CAT_MESHPEERING,
1736 			    IEEE80211_ACTION_MESHPEERING_CLOSE,
1737 			    args);
1738 			mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
1739 			mesh_peer_timeout_setup(ni);
1740 			break;
1741 		}
1742 		args[0] = ni->ni_mlpid;
1743 		args[1] = ni->ni_mllid;
1744 		ieee80211_send_action(ni,
1745 		    IEEE80211_ACTION_CAT_MESHPEERING,
1746 		    IEEE80211_ACTION_MESHPEERING_CONFIRM,
1747 		    args);
1748 		break;
1749 	case IEEE80211_NODE_MESH_HOLDING:
1750 		args[0] = ni->ni_mlpid;
1751 		args[1] = meshpeer->peer_llinkid;
1752 		args[2] = IEEE80211_REASON_MESH_MAX_RETRIES;
1753 		ieee80211_send_action(ni,
1754 		    IEEE80211_ACTION_CAT_MESHPEERING,
1755 		    IEEE80211_ACTION_MESHPEERING_CLOSE,
1756 		    args);
1757 		break;
1758 	}
1759 	return 0;
1760 }
1761 
1762 static int
1763 mesh_recv_action_meshpeering_confirm(struct ieee80211_node *ni,
1764 	const struct ieee80211_frame *wh,
1765 	const uint8_t *frm, const uint8_t *efrm)
1766 {
1767 	struct ieee80211vap *vap = ni->ni_vap;
1768 	struct ieee80211_meshpeer_ie ie;
1769 	const struct ieee80211_meshpeer_ie *meshpeer;
1770 	uint16_t args[3];
1771 
1772 	/* +2+2+2+2 for action + code + capabilites + status code + AID */
1773 	meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2+2+2, efrm, &ie,
1774 	    IEEE80211_ACTION_MESHPEERING_CONFIRM);
1775 	if (meshpeer == NULL) {
1776 		return 0;
1777 	}
1778 
1779 	IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
1780 	    "recv PEER CONFIRM, local id 0x%x, peer id 0x%x",
1781 	    meshpeer->peer_llinkid, meshpeer->peer_linkid);
1782 
1783 	switch (ni->ni_mlstate) {
1784 	case IEEE80211_NODE_MESH_OPENRCV:
1785 		mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED);
1786 		mesh_peer_timeout_stop(ni);
1787 		break;
1788 	case IEEE80211_NODE_MESH_OPENSNT:
1789 		mesh_linkchange(ni, IEEE80211_NODE_MESH_CONFIRMRCV);
1790 		break;
1791 	case IEEE80211_NODE_MESH_HOLDING:
1792 		args[0] = ni->ni_mlpid;
1793 		args[1] = meshpeer->peer_llinkid;
1794 		args[2] = IEEE80211_REASON_MESH_MAX_RETRIES;
1795 		ieee80211_send_action(ni,
1796 		    IEEE80211_ACTION_CAT_MESHPEERING,
1797 		    IEEE80211_ACTION_MESHPEERING_CLOSE,
1798 		    args);
1799 		break;
1800 	case IEEE80211_NODE_MESH_CONFIRMRCV:
1801 		if (ni->ni_mllid != meshpeer->peer_llinkid) {
1802 			args[0] = ni->ni_mlpid;
1803 			args[1] = ni->ni_mllid;
1804 			args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
1805 			ieee80211_send_action(ni,
1806 			    IEEE80211_ACTION_CAT_MESHPEERING,
1807 			    IEEE80211_ACTION_MESHPEERING_CLOSE,
1808 			    args);
1809 			mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
1810 			mesh_peer_timeout_setup(ni);
1811 		}
1812 		break;
1813 	default:
1814 		IEEE80211_DISCARD(vap,
1815 		    IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
1816 		    wh, NULL, "received confirm in invalid state %d",
1817 		    ni->ni_mlstate);
1818 		vap->iv_stats.is_rx_mgtdiscard++;
1819 		break;
1820 	}
1821 	return 0;
1822 }
1823 
1824 static int
1825 mesh_recv_action_meshpeering_close(struct ieee80211_node *ni,
1826 	const struct ieee80211_frame *wh,
1827 	const uint8_t *frm, const uint8_t *efrm)
1828 {
1829 	uint16_t args[3];
1830 
1831 	IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
1832 	    ni, "%s", "recv PEER CLOSE");
1833 
1834 	switch (ni->ni_mlstate) {
1835 	case IEEE80211_NODE_MESH_IDLE:
1836 		/* ignore */
1837 		break;
1838 	case IEEE80211_NODE_MESH_OPENRCV:
1839 	case IEEE80211_NODE_MESH_OPENSNT:
1840 	case IEEE80211_NODE_MESH_CONFIRMRCV:
1841 	case IEEE80211_NODE_MESH_ESTABLISHED:
1842 		args[0] = ni->ni_mlpid;
1843 		args[1] = ni->ni_mllid;
1844 		args[2] = IEEE80211_REASON_MESH_CLOSE_RCVD;
1845 		ieee80211_send_action(ni,
1846 		    IEEE80211_ACTION_CAT_MESHPEERING,
1847 		    IEEE80211_ACTION_MESHPEERING_CLOSE,
1848 		    args);
1849 		mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
1850 		mesh_peer_timeout_setup(ni);
1851 		break;
1852 	case IEEE80211_NODE_MESH_HOLDING:
1853 		mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE);
1854 		mesh_peer_timeout_setup(ni);
1855 		break;
1856 	}
1857 	return 0;
1858 }
1859 
1860 /*
1861  * Link Metric handling.
1862  */
1863 static int
1864 mesh_recv_action_meshlmetric_req(struct ieee80211_node *ni,
1865 	const struct ieee80211_frame *wh,
1866 	const uint8_t *frm, const uint8_t *efrm)
1867 {
1868 	uint32_t metric;
1869 
1870 	metric = mesh_airtime_calc(ni);
1871 	ieee80211_send_action(ni,
1872 	    IEEE80211_ACTION_CAT_MESHLMETRIC,
1873 	    IEEE80211_ACTION_MESHLMETRIC_REP,
1874 	    &metric);
1875 	return 0;
1876 }
1877 
1878 static int
1879 mesh_recv_action_meshlmetric_rep(struct ieee80211_node *ni,
1880 	const struct ieee80211_frame *wh,
1881 	const uint8_t *frm, const uint8_t *efrm)
1882 {
1883 	return 0;
1884 }
1885 
1886 static int
1887 mesh_send_action(struct ieee80211_node *ni, struct mbuf *m)
1888 {
1889 	struct ieee80211_bpf_params params;
1890 
1891 	memset(&params, 0, sizeof(params));
1892 	params.ibp_pri = WME_AC_VO;
1893 	params.ibp_rate0 = ni->ni_txparms->mgmtrate;
1894 	/* XXX ucast/mcast */
1895 	params.ibp_try0 = ni->ni_txparms->maxretry;
1896 	params.ibp_power = ni->ni_txpower;
1897 	return ieee80211_mgmt_output(ni, m, IEEE80211_FC0_SUBTYPE_ACTION,
1898 	     &params);
1899 }
1900 
1901 #define	ADDSHORT(frm, v) do {			\
1902 	frm[0] = (v) & 0xff;			\
1903 	frm[1] = (v) >> 8;			\
1904 	frm += 2;				\
1905 } while (0)
1906 #define	ADDWORD(frm, v) do {			\
1907 	frm[0] = (v) & 0xff;			\
1908 	frm[1] = ((v) >> 8) & 0xff;		\
1909 	frm[2] = ((v) >> 16) & 0xff;		\
1910 	frm[3] = ((v) >> 24) & 0xff;		\
1911 	frm += 4;				\
1912 } while (0)
1913 
1914 static int
1915 mesh_send_action_meshpeering_open(struct ieee80211_node *ni,
1916 	int category, int action, void *args0)
1917 {
1918 	struct ieee80211vap *vap = ni->ni_vap;
1919 	struct ieee80211com *ic = ni->ni_ic;
1920 	uint16_t *args = args0;
1921 	const struct ieee80211_rateset *rs;
1922 	struct mbuf *m;
1923 	uint8_t *frm;
1924 
1925 	IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
1926 	    "send PEER OPEN action: localid 0x%x", args[0]);
1927 
1928 	IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
1929 	    "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
1930 	    ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
1931 	ieee80211_ref_node(ni);
1932 
1933 	m = ieee80211_getmgtframe(&frm,
1934 	    ic->ic_headroom + sizeof(struct ieee80211_frame),
1935 	    sizeof(uint16_t)	/* action+category */
1936 	    + sizeof(uint16_t)	/* capabilites */
1937 	    + 2 + IEEE80211_RATE_SIZE
1938 	    + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
1939 	    + 2 + IEEE80211_MESHID_LEN
1940 	    + sizeof(struct ieee80211_meshconf_ie)
1941 	    + sizeof(struct ieee80211_meshpeer_ie)
1942 	);
1943 	if (m != NULL) {
1944 		/*
1945 		 * mesh peer open action frame format:
1946 		 *   [1] category
1947 		 *   [1] action
1948 		 *   [2] capabilities
1949 		 *   [tlv] rates
1950 		 *   [tlv] xrates
1951 		 *   [tlv] mesh id
1952 		 *   [tlv] mesh conf
1953 		 *   [tlv] mesh peer link mgmt
1954 		 */
1955 		*frm++ = category;
1956 		*frm++ = action;
1957 		ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan));
1958 		rs = ieee80211_get_suprates(ic, ic->ic_curchan);
1959 		frm = ieee80211_add_rates(frm, rs);
1960 		frm = ieee80211_add_xrates(frm, rs);
1961 		frm = ieee80211_add_meshid(frm, vap);
1962 		frm = ieee80211_add_meshconf(frm, vap);
1963 		frm = ieee80211_add_meshpeer(frm, IEEE80211_MESH_PEER_LINK_OPEN,
1964 		    args[0], 0, 0);
1965 		m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
1966 		return mesh_send_action(ni, m);
1967 	} else {
1968 		vap->iv_stats.is_tx_nobuf++;
1969 		ieee80211_free_node(ni);
1970 		return ENOMEM;
1971 	}
1972 }
1973 
1974 static int
1975 mesh_send_action_meshpeering_confirm(struct ieee80211_node *ni,
1976 	int category, int action, void *args0)
1977 {
1978 	struct ieee80211vap *vap = ni->ni_vap;
1979 	struct ieee80211com *ic = ni->ni_ic;
1980 	uint16_t *args = args0;
1981 	const struct ieee80211_rateset *rs;
1982 	struct mbuf *m;
1983 	uint8_t *frm;
1984 
1985 	IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
1986 	    "send PEER CONFIRM action: localid 0x%x, peerid 0x%x",
1987 	    args[0], args[1]);
1988 
1989 	IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
1990 	    "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
1991 	    ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
1992 	ieee80211_ref_node(ni);
1993 
1994 	m = ieee80211_getmgtframe(&frm,
1995 	    ic->ic_headroom + sizeof(struct ieee80211_frame),
1996 	    sizeof(uint16_t)	/* action+category */
1997 	    + sizeof(uint16_t)	/* capabilites */
1998 	    + sizeof(uint16_t)	/* status code */
1999 	    + sizeof(uint16_t)	/* AID */
2000 	    + 2 + IEEE80211_RATE_SIZE
2001 	    + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
2002 	    + 2 + IEEE80211_MESHID_LEN
2003 	    + sizeof(struct ieee80211_meshconf_ie)
2004 	    + sizeof(struct ieee80211_meshpeer_ie)
2005 	);
2006 	if (m != NULL) {
2007 		/*
2008 		 * mesh peer confirm action frame format:
2009 		 *   [1] category
2010 		 *   [1] action
2011 		 *   [2] capabilities
2012 		 *   [2] status code
2013 		 *   [2] association id (peer ID)
2014 		 *   [tlv] rates
2015 		 *   [tlv] xrates
2016 		 *   [tlv] mesh id
2017 		 *   [tlv] mesh conf
2018 		 *   [tlv] mesh peer link mgmt
2019 		 */
2020 		*frm++ = category;
2021 		*frm++ = action;
2022 		ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan));
2023 		ADDSHORT(frm, 0);		/* status code */
2024 		ADDSHORT(frm, args[1]);		/* AID */
2025 		rs = ieee80211_get_suprates(ic, ic->ic_curchan);
2026 		frm = ieee80211_add_rates(frm, rs);
2027 		frm = ieee80211_add_xrates(frm, rs);
2028 		frm = ieee80211_add_meshid(frm, vap);
2029 		frm = ieee80211_add_meshconf(frm, vap);
2030 		frm = ieee80211_add_meshpeer(frm,
2031 		    IEEE80211_MESH_PEER_LINK_CONFIRM,
2032 		    args[0], args[1], 0);
2033 		m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2034 		return mesh_send_action(ni, m);
2035 	} else {
2036 		vap->iv_stats.is_tx_nobuf++;
2037 		ieee80211_free_node(ni);
2038 		return ENOMEM;
2039 	}
2040 }
2041 
2042 static int
2043 mesh_send_action_meshpeering_close(struct ieee80211_node *ni,
2044 	int category, int action, void *args0)
2045 {
2046 	struct ieee80211vap *vap = ni->ni_vap;
2047 	struct ieee80211com *ic = ni->ni_ic;
2048 	uint16_t *args = args0;
2049 	struct mbuf *m;
2050 	uint8_t *frm;
2051 
2052 	IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2053 	    "send PEER CLOSE action: localid 0x%x, peerid 0x%x reason %d",
2054 	    args[0], args[1], args[2]);
2055 
2056 	IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2057 	    "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2058 	    ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2059 	ieee80211_ref_node(ni);
2060 
2061 	m = ieee80211_getmgtframe(&frm,
2062 	    ic->ic_headroom + sizeof(struct ieee80211_frame),
2063 	    sizeof(uint16_t)	/* action+category */
2064 	    + sizeof(uint16_t)	/* reason code */
2065 	    + 2 + IEEE80211_MESHID_LEN
2066 	    + sizeof(struct ieee80211_meshpeer_ie)
2067 	);
2068 	if (m != NULL) {
2069 		/*
2070 		 * mesh peer close action frame format:
2071 		 *   [1] category
2072 		 *   [1] action
2073 		 *   [2] reason code
2074 		 *   [tlv] mesh id
2075 		 *   [tlv] mesh peer link mgmt
2076 		 */
2077 		*frm++ = category;
2078 		*frm++ = action;
2079 		ADDSHORT(frm, args[2]);		/* reason code */
2080 		frm = ieee80211_add_meshid(frm, vap);
2081 		frm = ieee80211_add_meshpeer(frm,
2082 		    IEEE80211_MESH_PEER_LINK_CLOSE,
2083 		    args[0], args[1], args[2]);
2084 		m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2085 		return mesh_send_action(ni, m);
2086 	} else {
2087 		vap->iv_stats.is_tx_nobuf++;
2088 		ieee80211_free_node(ni);
2089 		return ENOMEM;
2090 	}
2091 }
2092 
2093 static int
2094 mesh_send_action_meshlink_request(struct ieee80211_node *ni,
2095 	int category, int action, void *arg0)
2096 {
2097 	struct ieee80211vap *vap = ni->ni_vap;
2098 	struct ieee80211com *ic = ni->ni_ic;
2099 	struct mbuf *m;
2100 	uint8_t *frm;
2101 
2102 	IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2103 	    "%s", "send LINK METRIC REQUEST action");
2104 
2105 	IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2106 	    "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2107 	    ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2108 	ieee80211_ref_node(ni);
2109 
2110 	m = ieee80211_getmgtframe(&frm,
2111 	    ic->ic_headroom + sizeof(struct ieee80211_frame),
2112 	    sizeof(uint16_t)	/* action+category */
2113 	);
2114 	if (m != NULL) {
2115 		/*
2116 		 * mesh link metric request
2117 		 *   [1] category
2118 		 *   [1] action
2119 		 */
2120 		*frm++ = category;
2121 		*frm++ = action;
2122 		m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2123 		return mesh_send_action(ni, m);
2124 	} else {
2125 		vap->iv_stats.is_tx_nobuf++;
2126 		ieee80211_free_node(ni);
2127 		return ENOMEM;
2128 	}
2129 }
2130 
2131 static int
2132 mesh_send_action_meshlink_reply(struct ieee80211_node *ni,
2133 	int category, int action, void *args0)
2134 {
2135 	struct ieee80211vap *vap = ni->ni_vap;
2136 	struct ieee80211com *ic = ni->ni_ic;
2137 	uint32_t *metric = args0;
2138 	struct mbuf *m;
2139 	uint8_t *frm;
2140 
2141 	IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2142 	    "send LINK METRIC REPLY action: metric 0x%x", *metric);
2143 
2144 	IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2145 	    "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2146 	    ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2147 	ieee80211_ref_node(ni);
2148 
2149 	m = ieee80211_getmgtframe(&frm,
2150 	    ic->ic_headroom + sizeof(struct ieee80211_frame),
2151 	    sizeof(uint16_t)	/* action+category */
2152 	    + sizeof(struct ieee80211_meshlmetric_ie)
2153 	);
2154 	if (m != NULL) {
2155 		/*
2156 		 * mesh link metric reply
2157 		 *   [1] category
2158 		 *   [1] action
2159 		 *   [tlv] mesh link metric
2160 		 */
2161 		*frm++ = category;
2162 		*frm++ = action;
2163 		frm = ieee80211_add_meshlmetric(frm, *metric);
2164 		m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2165 		return mesh_send_action(ni, m);
2166 	} else {
2167 		vap->iv_stats.is_tx_nobuf++;
2168 		ieee80211_free_node(ni);
2169 		return ENOMEM;
2170 	}
2171 }
2172 
2173 static void
2174 mesh_peer_timeout_setup(struct ieee80211_node *ni)
2175 {
2176 	switch (ni->ni_mlstate) {
2177 	case IEEE80211_NODE_MESH_HOLDING:
2178 		ni->ni_mltval = ieee80211_mesh_holdingtimeout;
2179 		break;
2180 	case IEEE80211_NODE_MESH_CONFIRMRCV:
2181 		ni->ni_mltval = ieee80211_mesh_confirmtimeout;
2182 		break;
2183 	case IEEE80211_NODE_MESH_IDLE:
2184 		ni->ni_mltval = 0;
2185 		break;
2186 	default:
2187 		ni->ni_mltval = ieee80211_mesh_retrytimeout;
2188 		break;
2189 	}
2190 	if (ni->ni_mltval)
2191 		callout_reset(&ni->ni_mltimer, ni->ni_mltval,
2192 		    mesh_peer_timeout_cb, ni);
2193 }
2194 
2195 /*
2196  * Same as above but backoffs timer statisically 50%.
2197  */
2198 static void
2199 mesh_peer_timeout_backoff(struct ieee80211_node *ni)
2200 {
2201 	uint32_t r;
2202 
2203 	r = arc4random();
2204 	ni->ni_mltval += r % ni->ni_mltval;
2205 	callout_reset(&ni->ni_mltimer, ni->ni_mltval, mesh_peer_timeout_cb,
2206 	    ni);
2207 }
2208 
2209 static __inline void
2210 mesh_peer_timeout_stop(struct ieee80211_node *ni)
2211 {
2212 	callout_drain(&ni->ni_mltimer);
2213 }
2214 
2215 /*
2216  * Mesh Peer Link Management FSM timeout handling.
2217  */
2218 static void
2219 mesh_peer_timeout_cb(void *arg)
2220 {
2221 	struct ieee80211_node *ni = (struct ieee80211_node *)arg;
2222 	uint16_t args[3];
2223 
2224 	IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_MESH,
2225 	    ni, "mesh link timeout, state %d, retry counter %d",
2226 	    ni->ni_mlstate, ni->ni_mlrcnt);
2227 
2228 	switch (ni->ni_mlstate) {
2229 	case IEEE80211_NODE_MESH_IDLE:
2230 	case IEEE80211_NODE_MESH_ESTABLISHED:
2231 		break;
2232 	case IEEE80211_NODE_MESH_OPENSNT:
2233 	case IEEE80211_NODE_MESH_OPENRCV:
2234 		if (ni->ni_mlrcnt == ieee80211_mesh_maxretries) {
2235 			args[0] = ni->ni_mlpid;
2236 			args[2] = IEEE80211_REASON_MESH_MAX_RETRIES;
2237 			ieee80211_send_action(ni,
2238 			    IEEE80211_ACTION_CAT_MESHPEERING,
2239 			    IEEE80211_ACTION_MESHPEERING_CLOSE, args);
2240 			ni->ni_mlrcnt = 0;
2241 			mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2242 			mesh_peer_timeout_setup(ni);
2243 		} else {
2244 			args[0] = ni->ni_mlpid;
2245 			ieee80211_send_action(ni,
2246 			    IEEE80211_ACTION_CAT_MESHPEERING,
2247 			    IEEE80211_ACTION_MESHPEERING_OPEN, args);
2248 			ni->ni_mlrcnt++;
2249 			mesh_peer_timeout_backoff(ni);
2250 		}
2251 		break;
2252 	case IEEE80211_NODE_MESH_CONFIRMRCV:
2253 		if (ni->ni_mlrcnt == ieee80211_mesh_maxretries) {
2254 			args[0] = ni->ni_mlpid;
2255 			args[2] = IEEE80211_REASON_MESH_CONFIRM_TIMEOUT;
2256 			ieee80211_send_action(ni,
2257 			    IEEE80211_ACTION_CAT_MESHPEERING,
2258 			    IEEE80211_ACTION_MESHPEERING_CLOSE, args);
2259 			ni->ni_mlrcnt = 0;
2260 			mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2261 			mesh_peer_timeout_setup(ni);
2262 		} else {
2263 			ni->ni_mlrcnt++;
2264 			mesh_peer_timeout_setup(ni);
2265 		}
2266 		break;
2267 	case IEEE80211_NODE_MESH_HOLDING:
2268 		mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE);
2269 		break;
2270 	}
2271 }
2272 
2273 static int
2274 mesh_verify_meshid(struct ieee80211vap *vap, const uint8_t *ie)
2275 {
2276 	struct ieee80211_mesh_state *ms = vap->iv_mesh;
2277 
2278 	if (ie == NULL || ie[1] != ms->ms_idlen)
2279 		return 1;
2280 	return memcmp(ms->ms_id, ie + 2, ms->ms_idlen);
2281 }
2282 
2283 /*
2284  * Check if we are using the same algorithms for this mesh.
2285  */
2286 static int
2287 mesh_verify_meshconf(struct ieee80211vap *vap, const uint8_t *ie)
2288 {
2289 	const struct ieee80211_meshconf_ie *meshconf =
2290 	    (const struct ieee80211_meshconf_ie *) ie;
2291 	const struct ieee80211_mesh_state *ms = vap->iv_mesh;
2292 	uint16_t cap;
2293 
2294 	if (meshconf == NULL)
2295 		return 1;
2296 	if (meshconf->conf_pselid != ms->ms_ppath->mpp_ie) {
2297 		IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
2298 		    "unknown path selection algorithm: 0x%x\n",
2299 		    meshconf->conf_pselid);
2300 		return 1;
2301 	}
2302 	if (meshconf->conf_pmetid != ms->ms_pmetric->mpm_ie) {
2303 		IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
2304 		    "unknown path metric algorithm: 0x%x\n",
2305 		    meshconf->conf_pmetid);
2306 		return 1;
2307 	}
2308 	if (meshconf->conf_ccid != 0) {
2309 		IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
2310 		    "unknown congestion control algorithm: 0x%x\n",
2311 		    meshconf->conf_ccid);
2312 		return 1;
2313 	}
2314 	if (meshconf->conf_syncid != IEEE80211_MESHCONF_SYNC_NEIGHOFF) {
2315 		IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
2316 		    "unknown sync algorithm: 0x%x\n",
2317 		    meshconf->conf_syncid);
2318 		return 1;
2319 	}
2320 	if (meshconf->conf_authid != 0) {
2321 		IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
2322 		    "unknown auth auth algorithm: 0x%x\n",
2323 		    meshconf->conf_pselid);
2324 		return 1;
2325 	}
2326 	/* NB: conf_cap is only read correctly here */
2327 	cap = LE_READ_2(&meshconf->conf_cap);
2328 	/* Not accepting peers */
2329 	if (!(cap & IEEE80211_MESHCONF_CAP_AP)) {
2330 		IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
2331 		    "not accepting peers: 0x%x\n", meshconf->conf_cap);
2332 		return 1;
2333 	}
2334 	return 0;
2335 }
2336 
2337 static int
2338 mesh_verify_meshpeer(struct ieee80211vap *vap, uint8_t subtype,
2339     const uint8_t *ie)
2340 {
2341 	const struct ieee80211_meshpeer_ie *meshpeer =
2342 	    (const struct ieee80211_meshpeer_ie *) ie;
2343 
2344 	if (meshpeer == NULL || meshpeer->peer_len < 6 ||
2345 	    meshpeer->peer_len > 10)
2346 		return 1;
2347 	switch (subtype) {
2348 	case IEEE80211_MESH_PEER_LINK_OPEN:
2349 		if (meshpeer->peer_len != 6)
2350 			return 1;
2351 		break;
2352 	case IEEE80211_MESH_PEER_LINK_CONFIRM:
2353 		if (meshpeer->peer_len != 8)
2354 			return 1;
2355 		break;
2356 	case IEEE80211_MESH_PEER_LINK_CLOSE:
2357 		if (meshpeer->peer_len < 8)
2358 			return 1;
2359 		if (meshpeer->peer_len == 8 && meshpeer->peer_linkid != 0)
2360 			return 1;
2361 		if (meshpeer->peer_rcode == 0)
2362 			return 1;
2363 		break;
2364 	}
2365 	return 0;
2366 }
2367 
2368 /*
2369  * Add a Mesh ID IE to a frame.
2370  */
2371 uint8_t *
2372 ieee80211_add_meshid(uint8_t *frm, struct ieee80211vap *vap)
2373 {
2374 	struct ieee80211_mesh_state *ms = vap->iv_mesh;
2375 
2376 	KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a mbss vap"));
2377 
2378 	*frm++ = IEEE80211_ELEMID_MESHID;
2379 	*frm++ = ms->ms_idlen;
2380 	memcpy(frm, ms->ms_id, ms->ms_idlen);
2381 	return frm + ms->ms_idlen;
2382 }
2383 
2384 /*
2385  * Add a Mesh Configuration IE to a frame.
2386  * For now just use HWMP routing, Airtime link metric, Null Congestion
2387  * Signaling, Null Sync Protocol and Null Authentication.
2388  */
2389 uint8_t *
2390 ieee80211_add_meshconf(uint8_t *frm, struct ieee80211vap *vap)
2391 {
2392 	const struct ieee80211_mesh_state *ms = vap->iv_mesh;
2393 	uint16_t caps;
2394 
2395 	KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap"));
2396 
2397 	*frm++ = IEEE80211_ELEMID_MESHCONF;
2398 	*frm++ = sizeof(struct ieee80211_meshconf_ie) - 2;
2399 	*frm++ = ms->ms_ppath->mpp_ie;		/* path selection */
2400 	*frm++ = ms->ms_pmetric->mpm_ie;	/* link metric */
2401 	*frm++ = IEEE80211_MESHCONF_CC_DISABLED;
2402 	*frm++ = IEEE80211_MESHCONF_SYNC_NEIGHOFF;
2403 	*frm++ = IEEE80211_MESHCONF_AUTH_DISABLED;
2404 	/* NB: set the number of neighbors before the rest */
2405 	*frm = (ms->ms_neighbors > 15 ? 15 : ms->ms_neighbors) << 1;
2406 	if (ms->ms_flags & IEEE80211_MESHFLAGS_PORTAL)
2407 		*frm |= IEEE80211_MESHCONF_FORM_MP;
2408 	frm += 1;
2409 	caps = 0;
2410 	if (ms->ms_flags & IEEE80211_MESHFLAGS_AP)
2411 		caps |= IEEE80211_MESHCONF_CAP_AP;
2412 	if (ms->ms_flags & IEEE80211_MESHFLAGS_FWD)
2413 		caps |= IEEE80211_MESHCONF_CAP_FWRD;
2414 	ADDSHORT(frm, caps);
2415 	return frm;
2416 }
2417 
2418 /*
2419  * Add a Mesh Peer Management IE to a frame.
2420  */
2421 uint8_t *
2422 ieee80211_add_meshpeer(uint8_t *frm, uint8_t subtype, uint16_t localid,
2423     uint16_t peerid, uint16_t reason)
2424 {
2425 	/* XXX change for AH */
2426 	static const uint8_t meshpeerproto[4] = IEEE80211_MESH_PEER_PROTO;
2427 
2428 	KASSERT(localid != 0, ("localid == 0"));
2429 
2430 	*frm++ = IEEE80211_ELEMID_MESHPEER;
2431 	switch (subtype) {
2432 	case IEEE80211_MESH_PEER_LINK_OPEN:
2433 		*frm++ = 6;		/* length */
2434 		memcpy(frm, meshpeerproto, 4);
2435 		frm += 4;
2436 		ADDSHORT(frm, localid);	/* local ID */
2437 		break;
2438 	case IEEE80211_MESH_PEER_LINK_CONFIRM:
2439 		KASSERT(peerid != 0, ("sending peer confirm without peer id"));
2440 		*frm++ = 8;		/* length */
2441 		memcpy(frm, meshpeerproto, 4);
2442 		frm += 4;
2443 		ADDSHORT(frm, localid);	/* local ID */
2444 		ADDSHORT(frm, peerid);	/* peer ID */
2445 		break;
2446 	case IEEE80211_MESH_PEER_LINK_CLOSE:
2447 		if (peerid)
2448 			*frm++ = 10;	/* length */
2449 		else
2450 			*frm++ = 8;	/* length */
2451 		memcpy(frm, meshpeerproto, 4);
2452 		frm += 4;
2453 		ADDSHORT(frm, localid);	/* local ID */
2454 		if (peerid)
2455 			ADDSHORT(frm, peerid);	/* peer ID */
2456 		ADDSHORT(frm, reason);
2457 		break;
2458 	}
2459 	return frm;
2460 }
2461 
2462 /*
2463  * Compute an Airtime Link Metric for the link with this node.
2464  *
2465  * Based on Draft 3.0 spec (11B.10, p.149).
2466  */
2467 /*
2468  * Max 802.11s overhead.
2469  */
2470 #define IEEE80211_MESH_MAXOVERHEAD \
2471 	(sizeof(struct ieee80211_qosframe_addr4) \
2472 	 + sizeof(struct ieee80211_meshcntl_ae11) \
2473 	+ sizeof(struct llc) \
2474 	+ IEEE80211_ADDR_LEN \
2475 	+ IEEE80211_WEP_IVLEN \
2476 	+ IEEE80211_WEP_KIDLEN \
2477 	+ IEEE80211_WEP_CRCLEN \
2478 	+ IEEE80211_WEP_MICLEN \
2479 	+ IEEE80211_CRC_LEN)
2480 uint32_t
2481 mesh_airtime_calc(struct ieee80211_node *ni)
2482 {
2483 #define M_BITS 8
2484 #define S_FACTOR (2 * M_BITS)
2485 	struct ieee80211com *ic = ni->ni_ic;
2486 	struct ifnet *ifp = ni->ni_vap->iv_ifp;
2487 	const static int nbits = 8192 << M_BITS;
2488 	uint32_t overhead, rate, errrate;
2489 	uint64_t res;
2490 
2491 	/* Time to transmit a frame */
2492 	rate = ni->ni_txrate;
2493 	overhead = ieee80211_compute_duration(ic->ic_rt,
2494 	    ifp->if_mtu + IEEE80211_MESH_MAXOVERHEAD, rate, 0) << M_BITS;
2495 	/* Error rate in percentage */
2496 	/* XXX assuming small failures are ok */
2497 	errrate = (((ifp->if_oerrors +
2498 	    ifp->if_ierrors) / 100) << M_BITS) / 100;
2499 	res = (overhead + (nbits / rate)) *
2500 	    ((1 << S_FACTOR) / ((1 << M_BITS) - errrate));
2501 
2502 	return (uint32_t)(res >> S_FACTOR);
2503 #undef M_BITS
2504 #undef S_FACTOR
2505 }
2506 
2507 /*
2508  * Add a Mesh Link Metric report IE to a frame.
2509  */
2510 uint8_t *
2511 ieee80211_add_meshlmetric(uint8_t *frm, uint32_t metric)
2512 {
2513 	*frm++ = IEEE80211_ELEMID_MESHLINK;
2514 	*frm++ = 4;
2515 	ADDWORD(frm, metric);
2516 	return frm;
2517 }
2518 #undef ADDSHORT
2519 #undef ADDWORD
2520 
2521 /*
2522  * Initialize any mesh-specific node state.
2523  */
2524 void
2525 ieee80211_mesh_node_init(struct ieee80211vap *vap, struct ieee80211_node *ni)
2526 {
2527 	ni->ni_flags |= IEEE80211_NODE_QOS;
2528 	callout_init(&ni->ni_mltimer, CALLOUT_MPSAFE);
2529 }
2530 
2531 /*
2532  * Cleanup any mesh-specific node state.
2533  */
2534 void
2535 ieee80211_mesh_node_cleanup(struct ieee80211_node *ni)
2536 {
2537 	struct ieee80211vap *vap = ni->ni_vap;
2538 	struct ieee80211_mesh_state *ms = vap->iv_mesh;
2539 
2540 	callout_drain(&ni->ni_mltimer);
2541 	/* NB: short-circuit callbacks after mesh_vdetach */
2542 	if (vap->iv_mesh != NULL)
2543 		ms->ms_ppath->mpp_peerdown(ni);
2544 }
2545 
2546 void
2547 ieee80211_parse_meshid(struct ieee80211_node *ni, const uint8_t *ie)
2548 {
2549 	ni->ni_meshidlen = ie[1];
2550 	memcpy(ni->ni_meshid, ie + 2, ie[1]);
2551 }
2552 
2553 /*
2554  * Setup mesh-specific node state on neighbor discovery.
2555  */
2556 void
2557 ieee80211_mesh_init_neighbor(struct ieee80211_node *ni,
2558 	const struct ieee80211_frame *wh,
2559 	const struct ieee80211_scanparams *sp)
2560 {
2561 	ieee80211_parse_meshid(ni, sp->meshid);
2562 }
2563 
2564 void
2565 ieee80211_mesh_update_beacon(struct ieee80211vap *vap,
2566 	struct ieee80211_beacon_offsets *bo)
2567 {
2568 	KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap"));
2569 
2570 	if (isset(bo->bo_flags, IEEE80211_BEACON_MESHCONF)) {
2571 		(void)ieee80211_add_meshconf(bo->bo_meshconf, vap);
2572 		clrbit(bo->bo_flags, IEEE80211_BEACON_MESHCONF);
2573 	}
2574 }
2575 
2576 static int
2577 mesh_ioctl_get80211(struct ieee80211vap *vap, struct ieee80211req *ireq)
2578 {
2579 	struct ieee80211_mesh_state *ms = vap->iv_mesh;
2580 	uint8_t tmpmeshid[IEEE80211_NWID_LEN];
2581 	struct ieee80211_mesh_route *rt;
2582 	struct ieee80211req_mesh_route *imr;
2583 	size_t len, off;
2584 	uint8_t *p;
2585 	int error;
2586 
2587 	if (vap->iv_opmode != IEEE80211_M_MBSS)
2588 		return ENOSYS;
2589 
2590 	error = 0;
2591 	switch (ireq->i_type) {
2592 	case IEEE80211_IOC_MESH_ID:
2593 		ireq->i_len = ms->ms_idlen;
2594 		memcpy(tmpmeshid, ms->ms_id, ireq->i_len);
2595 		error = copyout(tmpmeshid, ireq->i_data, ireq->i_len);
2596 		break;
2597 	case IEEE80211_IOC_MESH_AP:
2598 		ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_AP) != 0;
2599 		break;
2600 	case IEEE80211_IOC_MESH_FWRD:
2601 		ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) != 0;
2602 		break;
2603 	case IEEE80211_IOC_MESH_TTL:
2604 		ireq->i_val = ms->ms_ttl;
2605 		break;
2606 	case IEEE80211_IOC_MESH_RTCMD:
2607 		switch (ireq->i_val) {
2608 		case IEEE80211_MESH_RTCMD_LIST:
2609 			len = 0;
2610 			MESH_RT_LOCK(ms);
2611 			TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) {
2612 				len += sizeof(*imr);
2613 			}
2614 			MESH_RT_UNLOCK(ms);
2615 			if (len > ireq->i_len || ireq->i_len < sizeof(*imr)) {
2616 				ireq->i_len = len;
2617 				return ENOMEM;
2618 			}
2619 			ireq->i_len = len;
2620 			/* XXX M_WAIT? */
2621 			p = malloc(len, M_TEMP, M_NOWAIT | M_ZERO);
2622 			if (p == NULL)
2623 				return ENOMEM;
2624 			off = 0;
2625 			MESH_RT_LOCK(ms);
2626 			TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) {
2627 				if (off >= len)
2628 					break;
2629 				imr = (struct ieee80211req_mesh_route *)
2630 				    (p + off);
2631 				imr->imr_flags = rt->rt_flags;
2632 				IEEE80211_ADDR_COPY(imr->imr_dest,
2633 				    rt->rt_dest);
2634 				IEEE80211_ADDR_COPY(imr->imr_nexthop,
2635 				    rt->rt_nexthop);
2636 				imr->imr_metric = rt->rt_metric;
2637 				imr->imr_nhops = rt->rt_nhops;
2638 				imr->imr_lifetime = rt->rt_lifetime;
2639 				imr->imr_lastmseq = rt->rt_lastmseq;
2640 				off += sizeof(*imr);
2641 			}
2642 			MESH_RT_UNLOCK(ms);
2643 			error = copyout(p, (uint8_t *)ireq->i_data,
2644 			    ireq->i_len);
2645 			free(p, M_TEMP);
2646 			break;
2647 		case IEEE80211_MESH_RTCMD_FLUSH:
2648 		case IEEE80211_MESH_RTCMD_ADD:
2649 		case IEEE80211_MESH_RTCMD_DELETE:
2650 			return EINVAL;
2651 		default:
2652 			return ENOSYS;
2653 		}
2654 		break;
2655 	case IEEE80211_IOC_MESH_PR_METRIC:
2656 		len = strlen(ms->ms_pmetric->mpm_descr);
2657 		if (ireq->i_len < len)
2658 			return EINVAL;
2659 		ireq->i_len = len;
2660 		error = copyout(ms->ms_pmetric->mpm_descr,
2661 		    (uint8_t *)ireq->i_data, len);
2662 		break;
2663 	case IEEE80211_IOC_MESH_PR_PATH:
2664 		len = strlen(ms->ms_ppath->mpp_descr);
2665 		if (ireq->i_len < len)
2666 			return EINVAL;
2667 		ireq->i_len = len;
2668 		error = copyout(ms->ms_ppath->mpp_descr,
2669 		    (uint8_t *)ireq->i_data, len);
2670 		break;
2671 	default:
2672 		return ENOSYS;
2673 	}
2674 
2675 	return error;
2676 }
2677 IEEE80211_IOCTL_GET(mesh, mesh_ioctl_get80211);
2678 
2679 static int
2680 mesh_ioctl_set80211(struct ieee80211vap *vap, struct ieee80211req *ireq)
2681 {
2682 	struct ieee80211_mesh_state *ms = vap->iv_mesh;
2683 	uint8_t tmpmeshid[IEEE80211_NWID_LEN];
2684 	uint8_t tmpaddr[IEEE80211_ADDR_LEN];
2685 	char tmpproto[IEEE80211_MESH_PROTO_DSZ];
2686 	int error;
2687 
2688 	if (vap->iv_opmode != IEEE80211_M_MBSS)
2689 		return ENOSYS;
2690 
2691 	error = 0;
2692 	switch (ireq->i_type) {
2693 	case IEEE80211_IOC_MESH_ID:
2694 		if (ireq->i_val != 0 || ireq->i_len > IEEE80211_MESHID_LEN)
2695 			return EINVAL;
2696 		error = copyin(ireq->i_data, tmpmeshid, ireq->i_len);
2697 		if (error != 0)
2698 			break;
2699 		memset(ms->ms_id, 0, IEEE80211_NWID_LEN);
2700 		ms->ms_idlen = ireq->i_len;
2701 		memcpy(ms->ms_id, tmpmeshid, ireq->i_len);
2702 		error = ENETRESET;
2703 		break;
2704 	case IEEE80211_IOC_MESH_AP:
2705 		if (ireq->i_val)
2706 			ms->ms_flags |= IEEE80211_MESHFLAGS_AP;
2707 		else
2708 			ms->ms_flags &= ~IEEE80211_MESHFLAGS_AP;
2709 		error = ENETRESET;
2710 		break;
2711 	case IEEE80211_IOC_MESH_FWRD:
2712 		if (ireq->i_val)
2713 			ms->ms_flags |= IEEE80211_MESHFLAGS_FWD;
2714 		else
2715 			ms->ms_flags &= ~IEEE80211_MESHFLAGS_FWD;
2716 		break;
2717 	case IEEE80211_IOC_MESH_TTL:
2718 		ms->ms_ttl = (uint8_t) ireq->i_val;
2719 		break;
2720 	case IEEE80211_IOC_MESH_RTCMD:
2721 		switch (ireq->i_val) {
2722 		case IEEE80211_MESH_RTCMD_LIST:
2723 			return EINVAL;
2724 		case IEEE80211_MESH_RTCMD_FLUSH:
2725 			ieee80211_mesh_rt_flush(vap);
2726 			break;
2727 		case IEEE80211_MESH_RTCMD_ADD:
2728 			if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ireq->i_data) ||
2729 			    IEEE80211_ADDR_EQ(broadcastaddr, ireq->i_data))
2730 				return EINVAL;
2731 			error = copyin(ireq->i_data, &tmpaddr,
2732 			    IEEE80211_ADDR_LEN);
2733 			if (error == 0)
2734 				ieee80211_mesh_discover(vap, tmpaddr, NULL);
2735 			break;
2736 		case IEEE80211_MESH_RTCMD_DELETE:
2737 			ieee80211_mesh_rt_del(vap, ireq->i_data);
2738 			break;
2739 		default:
2740 			return ENOSYS;
2741 		}
2742 		break;
2743 	case IEEE80211_IOC_MESH_PR_METRIC:
2744 		error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto));
2745 		if (error == 0) {
2746 			error = mesh_select_proto_metric(vap, tmpproto);
2747 			if (error == 0)
2748 				error = ENETRESET;
2749 		}
2750 		break;
2751 	case IEEE80211_IOC_MESH_PR_PATH:
2752 		error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto));
2753 		if (error == 0) {
2754 			error = mesh_select_proto_path(vap, tmpproto);
2755 			if (error == 0)
2756 				error = ENETRESET;
2757 		}
2758 		break;
2759 	default:
2760 		return ENOSYS;
2761 	}
2762 	return error;
2763 }
2764 IEEE80211_IOCTL_SET(mesh, mesh_ioctl_set80211);
2765