xref: /dflybsd-src/sys/netproto/802_11/wlan/ieee80211_mesh.c (revision a9656fbcd49c376aba5e04370d8b0f1fa96e063c)
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  * $FreeBSD: head/sys/net80211/ieee80211_mesh.c 203423 2010-02-03 10:12:49Z rpaulo $
30  * $DragonFly$
31  */
32 
33 /*
34  * IEEE 802.11s Mesh Point (MBSS) support.
35  *
36  * Based on March 2009, D3.0 802.11s draft spec.
37  */
38 #include "opt_inet.h"
39 #include "opt_wlan.h"
40 
41 #include <sys/param.h>
42 #include <sys/systm.h>
43 #include <sys/mbuf.h>
44 #include <sys/malloc.h>
45 #include <sys/kernel.h>
46 
47 #include <sys/socket.h>
48 #include <sys/sockio.h>
49 #include <sys/endian.h>
50 #include <sys/errno.h>
51 #include <sys/proc.h>
52 #include <sys/sysctl.h>
53 
54 #include <net/if.h>
55 #include <net/if_media.h>
56 #include <net/if_llc.h>
57 #include <net/ethernet.h>
58 #include <net/route.h>
59 
60 #include <netproto/802_11/ieee80211_var.h>
61 #include <netproto/802_11/ieee80211_action.h>
62 #include <netproto/802_11/ieee80211_input.h>
63 #include <netproto/802_11/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_peer_timeout_setup(struct ieee80211_node *);
86 static void	mesh_peer_timeout_backoff(struct ieee80211_node *);
87 static void	mesh_peer_timeout_cb(void *);
88 static __inline void
89 		mesh_peer_timeout_stop(struct ieee80211_node *);
90 static int	mesh_verify_meshid(struct ieee80211vap *, const uint8_t *);
91 static int	mesh_verify_meshconf(struct ieee80211vap *, const uint8_t *);
92 static int	mesh_verify_meshpeer(struct ieee80211vap *, uint8_t,
93     		    const uint8_t *);
94 uint32_t	mesh_airtime_calc(struct ieee80211_node *);
95 
96 /*
97  * Timeout values come from the specification and are in milliseconds.
98  */
99 SYSCTL_NODE(_net_wlan, OID_AUTO, mesh, CTLFLAG_RD, 0,
100     "IEEE 802.11s parameters");
101 static int ieee80211_mesh_retrytimeout = -1;
102 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, retrytimeout, CTLTYPE_INT | CTLFLAG_RW,
103     &ieee80211_mesh_retrytimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
104     "Retry timeout (msec)");
105 static int ieee80211_mesh_holdingtimeout = -1;
106 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, holdingtimeout, CTLTYPE_INT | CTLFLAG_RW,
107     &ieee80211_mesh_holdingtimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
108     "Holding state timeout (msec)");
109 static int ieee80211_mesh_confirmtimeout = -1;
110 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, confirmtimeout, CTLTYPE_INT | CTLFLAG_RW,
111     &ieee80211_mesh_confirmtimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
112     "Confirm state timeout (msec)");
113 static int ieee80211_mesh_maxretries = 2;
114 SYSCTL_INT(_net_wlan_mesh, OID_AUTO, maxretries, CTLTYPE_INT | CTLFLAG_RW,
115     &ieee80211_mesh_maxretries, 0,
116     "Maximum retries during peer link establishment");
117 
118 static const uint8_t broadcastaddr[IEEE80211_ADDR_LEN] =
119 	{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
120 
121 static	ieee80211_recv_action_func mesh_recv_action_meshpeering_open;
122 static	ieee80211_recv_action_func mesh_recv_action_meshpeering_confirm;
123 static	ieee80211_recv_action_func mesh_recv_action_meshpeering_close;
124 static	ieee80211_recv_action_func mesh_recv_action_meshlmetric_req;
125 static	ieee80211_recv_action_func mesh_recv_action_meshlmetric_rep;
126 
127 static	ieee80211_send_action_func mesh_send_action_meshpeering_open;
128 static	ieee80211_send_action_func mesh_send_action_meshpeering_confirm;
129 static	ieee80211_send_action_func mesh_send_action_meshpeering_close;
130 static	ieee80211_send_action_func mesh_send_action_meshlink_request;
131 static	ieee80211_send_action_func mesh_send_action_meshlink_reply;
132 
133 static const struct ieee80211_mesh_proto_metric mesh_metric_airtime = {
134 	.mpm_descr	= "AIRTIME",
135 	.mpm_ie		= IEEE80211_MESHCONF_METRIC_AIRTIME,
136 	.mpm_metric	= mesh_airtime_calc,
137 };
138 
139 static struct ieee80211_mesh_proto_path		mesh_proto_paths[4];
140 static struct ieee80211_mesh_proto_metric	mesh_proto_metrics[4];
141 
142 #define	MESH_RT_LOCK(ms)	lockmgr(&(ms)->ms_rt_lock, LK_EXCLUSIVE)
143 #define	MESH_RT_LOCK_ASSERT(ms)	\
144 	KKASSERT(lockstatus(&(ms)->ms_rt_lock, curthread) != 0)
145 #define	MESH_RT_UNLOCK(ms)	lockmgr(&(ms)->ms_rt_lock, LK_RELEASE)
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 = kmalloc(ALIGN(sizeof(struct ieee80211_mesh_route)) +
180 	    ms->ms_ppath->mpp_privlen, M_80211_MESH_RT, M_INTWAIT | 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 	kfree(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_MUTABLE(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_MUTABLE(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_MUTABLE(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_MUTABLE(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_stop(&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_stop(&ms->ms_cleantimer);
507 	ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_vdetach_peers,
508 	    NULL);
509 	ieee80211_mesh_rt_flush(vap);
510 	lockuninit(&ms->ms_rt_lock);
511 	ms->ms_ppath->mpp_vdetach(vap);
512 	kfree(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 	ms = kmalloc(sizeof(struct ieee80211_mesh_state), M_80211_VAP,
525 	    M_INTWAIT | M_ZERO);
526 	if (ms == NULL) {
527 		kprintf("%s: couldn't alloc MBSS state\n", __func__);
528 		return;
529 	}
530 	vap->iv_mesh = ms;
531 	ms->ms_seq = 0;
532 	ms->ms_flags = (IEEE80211_MESHFLAGS_AP | IEEE80211_MESHFLAGS_FWD);
533 	ms->ms_ttl = IEEE80211_MESH_DEFAULT_TTL;
534 	TAILQ_INIT(&ms->ms_routes);
535 	lockinit(&ms->ms_rt_lock, "MBSS", 0, 0);
536 	callout_init_mp(&ms->ms_cleantimer);
537 	mesh_select_proto_metric(vap, "AIRTIME");
538 	KASSERT(ms->ms_pmetric, ("ms_pmetric == NULL"));
539 	mesh_select_proto_path(vap, "HWMP");
540 	KASSERT(ms->ms_ppath, ("ms_ppath == NULL"));
541 	ms->ms_ppath->mpp_vattach(vap);
542 }
543 
544 /*
545  * IEEE80211_M_MBSS vap state machine handler.
546  */
547 static int
548 mesh_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
549 {
550 	struct ieee80211_mesh_state *ms = vap->iv_mesh;
551 	struct ieee80211com *ic = vap->iv_ic;
552 	struct ieee80211_node *ni;
553 	enum ieee80211_state ostate;
554 
555 	IEEE80211_LOCK_ASSERT(ic);
556 
557 	ostate = vap->iv_state;
558 	IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n",
559 	    __func__, ieee80211_state_name[ostate],
560 	    ieee80211_state_name[nstate], arg);
561 	vap->iv_state = nstate;		/* state transition */
562 	if (ostate != IEEE80211_S_SCAN)
563 		ieee80211_cancel_scan(vap);	/* background scan */
564 	ni = vap->iv_bss;			/* NB: no reference held */
565 	if (nstate != IEEE80211_S_RUN && ostate == IEEE80211_S_RUN)
566 		callout_stop(&ms->ms_cleantimer);
567 	switch (nstate) {
568 	case IEEE80211_S_INIT:
569 		switch (ostate) {
570 		case IEEE80211_S_SCAN:
571 			ieee80211_cancel_scan(vap);
572 			break;
573 		case IEEE80211_S_CAC:
574 			ieee80211_dfs_cac_stop(vap);
575 			break;
576 		case IEEE80211_S_RUN:
577 			ieee80211_iterate_nodes(&ic->ic_sta,
578 			    mesh_vdetach_peers, NULL);
579 			break;
580 		default:
581 			break;
582 		}
583 		if (ostate != IEEE80211_S_INIT) {
584 			/* NB: optimize INIT -> INIT case */
585 			ieee80211_reset_bss(vap);
586 			ieee80211_mesh_rt_flush(vap);
587 		}
588 		break;
589 	case IEEE80211_S_SCAN:
590 		switch (ostate) {
591 		case IEEE80211_S_INIT:
592 			if (vap->iv_des_chan != IEEE80211_CHAN_ANYC &&
593 			    !IEEE80211_IS_CHAN_RADAR(vap->iv_des_chan) &&
594 			    ms->ms_idlen != 0) {
595 				/*
596 				 * Already have a channel and a mesh ID; bypass
597 				 * the scan and startup immediately.
598 				 */
599 				ieee80211_create_ibss(vap, vap->iv_des_chan);
600 				break;
601 			}
602 			/*
603 			 * Initiate a scan.  We can come here as a result
604 			 * of an IEEE80211_IOC_SCAN_REQ too in which case
605 			 * the vap will be marked with IEEE80211_FEXT_SCANREQ
606 			 * and the scan request parameters will be present
607 			 * in iv_scanreq.  Otherwise we do the default.
608 			*/
609 			if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) {
610 				ieee80211_check_scan(vap,
611 				    vap->iv_scanreq_flags,
612 				    vap->iv_scanreq_duration,
613 				    vap->iv_scanreq_mindwell,
614 				    vap->iv_scanreq_maxdwell,
615 				    vap->iv_scanreq_nssid, vap->iv_scanreq_ssid);
616 				vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ;
617 			} else
618 				ieee80211_check_scan_current(vap);
619 			break;
620 		default:
621 			break;
622 		}
623 		break;
624 	case IEEE80211_S_CAC:
625 		/*
626 		 * Start CAC on a DFS channel.  We come here when starting
627 		 * a bss on a DFS channel (see ieee80211_create_ibss).
628 		 */
629 		ieee80211_dfs_cac_start(vap);
630 		break;
631 	case IEEE80211_S_RUN:
632 		switch (ostate) {
633 		case IEEE80211_S_INIT:
634 			/*
635 			 * Already have a channel; bypass the
636 			 * scan and startup immediately.
637 			 * Note that ieee80211_create_ibss will call
638 			 * back to do a RUN->RUN state change.
639 			 */
640 			ieee80211_create_ibss(vap,
641 			    ieee80211_ht_adjust_channel(ic,
642 				ic->ic_curchan, vap->iv_flags_ht));
643 			/* NB: iv_bss is changed on return */
644 			break;
645 		case IEEE80211_S_CAC:
646 			/*
647 			 * NB: This is the normal state change when CAC
648 			 * expires and no radar was detected; no need to
649 			 * clear the CAC timer as it's already expired.
650 			 */
651 			/* fall thru... */
652 		case IEEE80211_S_CSA:
653 #if 0
654 			/*
655 			 * Shorten inactivity timer of associated stations
656 			 * to weed out sta's that don't follow a CSA.
657 			 */
658 			ieee80211_iterate_nodes(&ic->ic_sta, sta_csa, vap);
659 #endif
660 			/*
661 			 * Update bss node channel to reflect where
662 			 * we landed after CSA.
663 			 */
664 			ieee80211_node_set_chan(vap->iv_bss,
665 			    ieee80211_ht_adjust_channel(ic, ic->ic_curchan,
666 				ieee80211_htchanflags(vap->iv_bss->ni_chan)));
667 			/* XXX bypass debug msgs */
668 			break;
669 		case IEEE80211_S_SCAN:
670 		case IEEE80211_S_RUN:
671 #ifdef IEEE80211_DEBUG
672 			if (ieee80211_msg_debug(vap)) {
673 				struct ieee80211_node *ni = vap->iv_bss;
674 				ieee80211_note(vap,
675 				    "synchronized with %6D meshid ",
676 				    ni->ni_meshid, ":");
677 				ieee80211_print_essid(ni->ni_meshid,
678 				    ni->ni_meshidlen);
679 				/* XXX MCS/HT */
680 				kprintf(" channel %d\n",
681 				    ieee80211_chan2ieee(ic, ic->ic_curchan));
682 			}
683 #endif
684 			break;
685 		default:
686 			break;
687 		}
688 		ieee80211_node_authorize(vap->iv_bss);
689 		callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact,
690                     mesh_rt_cleanup_cb, vap);
691 		break;
692 	default:
693 		break;
694 	}
695 	/* NB: ostate not nstate */
696 	ms->ms_ppath->mpp_newstate(vap, ostate, arg);
697 	return 0;
698 }
699 
700 static void
701 mesh_rt_cleanup_cb(void *arg)
702 {
703 	struct ieee80211vap *vap = arg;
704 	struct ieee80211_mesh_state *ms = vap->iv_mesh;
705 
706 	mesh_rt_flush_invalid(vap);
707 	callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact,
708 	    mesh_rt_cleanup_cb, vap);
709 }
710 
711 
712 /*
713  * Helper function to note the Mesh Peer Link FSM change.
714  */
715 static void
716 mesh_linkchange(struct ieee80211_node *ni, enum ieee80211_mesh_mlstate state)
717 {
718 	struct ieee80211vap *vap = ni->ni_vap;
719 	struct ieee80211_mesh_state *ms = vap->iv_mesh;
720 #ifdef IEEE80211_DEBUG
721 	static const char *meshlinkstates[] = {
722 		[IEEE80211_NODE_MESH_IDLE]		= "IDLE",
723 		[IEEE80211_NODE_MESH_OPENSNT]		= "OPEN SENT",
724 		[IEEE80211_NODE_MESH_OPENRCV]		= "OPEN RECEIVED",
725 		[IEEE80211_NODE_MESH_CONFIRMRCV]	= "CONFIRM RECEIVED",
726 		[IEEE80211_NODE_MESH_ESTABLISHED]	= "ESTABLISHED",
727 		[IEEE80211_NODE_MESH_HOLDING]		= "HOLDING"
728 	};
729 #endif
730 	IEEE80211_NOTE(vap, IEEE80211_MSG_MESH,
731 	    ni, "peer link: %s -> %s",
732 	    meshlinkstates[ni->ni_mlstate], meshlinkstates[state]);
733 
734 	/* track neighbor count */
735 	if (state == IEEE80211_NODE_MESH_ESTABLISHED &&
736 	    ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) {
737 		KASSERT(ms->ms_neighbors < 65535, ("neighbor count overflow"));
738 		ms->ms_neighbors++;
739 		ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF);
740 	} else if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED &&
741 	    state != IEEE80211_NODE_MESH_ESTABLISHED) {
742 		KASSERT(ms->ms_neighbors > 0, ("neighbor count 0"));
743 		ms->ms_neighbors--;
744 		ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF);
745 	}
746 	ni->ni_mlstate = state;
747 	switch (state) {
748 	case IEEE80211_NODE_MESH_HOLDING:
749 		ms->ms_ppath->mpp_peerdown(ni);
750 		break;
751 	case IEEE80211_NODE_MESH_ESTABLISHED:
752 		ieee80211_mesh_discover(vap, ni->ni_macaddr, NULL);
753 		break;
754 	default:
755 		break;
756 	}
757 }
758 
759 /*
760  * Helper function to generate a unique local ID required for mesh
761  * peer establishment.
762  */
763 static void
764 mesh_checkid(void *arg, struct ieee80211_node *ni)
765 {
766 	uint16_t *r = arg;
767 
768 	if (*r == ni->ni_mllid)
769 		*(uint16_t *)arg = 0;
770 }
771 
772 static uint32_t
773 mesh_generateid(struct ieee80211vap *vap)
774 {
775 	int maxiter = 4;
776 	uint16_t r;
777 
778 	do {
779 		get_random_bytes(&r, 2);
780 		ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_checkid, &r);
781 		maxiter--;
782 	} while (r == 0 && maxiter > 0);
783 	return r;
784 }
785 
786 /*
787  * Verifies if we already received this packet by checking its
788  * sequence number.
789  * Returns 0 if the frame is to be accepted, 1 otherwise.
790  */
791 static int
792 mesh_checkpseq(struct ieee80211vap *vap,
793     const uint8_t source[IEEE80211_ADDR_LEN], uint32_t seq)
794 {
795 	struct ieee80211_mesh_route *rt;
796 
797 	rt = ieee80211_mesh_rt_find(vap, source);
798 	if (rt == NULL) {
799 		rt = ieee80211_mesh_rt_add(vap, source);
800 		if (rt == NULL) {
801 			IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source,
802 			    "%s", "add mcast route failed");
803 			vap->iv_stats.is_mesh_rtaddfailed++;
804 			return 1;
805 		}
806 		IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source,
807 		    "add mcast route, mesh seqno %d", seq);
808 		rt->rt_lastmseq = seq;
809 		return 0;
810 	}
811 	if (IEEE80211_MESH_SEQ_GEQ(rt->rt_lastmseq, seq)) {
812 		return 1;
813 	} else {
814 		rt->rt_lastmseq = seq;
815 		return 0;
816 	}
817 }
818 
819 /*
820  * Iterate the routing table and locate the next hop.
821  */
822 static struct ieee80211_node *
823 mesh_find_txnode(struct ieee80211vap *vap,
824     const uint8_t dest[IEEE80211_ADDR_LEN])
825 {
826 	struct ieee80211_mesh_route *rt;
827 
828 	rt = ieee80211_mesh_rt_find(vap, dest);
829 	if (rt == NULL)
830 		return NULL;
831 	if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0 ||
832 	    (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY)) {
833 		IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
834 		    "%s: !valid or proxy, flags 0x%x", __func__, rt->rt_flags);
835 		/* XXX stat */
836 		return NULL;
837 	}
838 	return ieee80211_find_txnode(vap, rt->rt_nexthop);
839 }
840 
841 /*
842  * Forward the specified frame.
843  * Decrement the TTL and set TA to our MAC address.
844  */
845 static void
846 mesh_forward(struct ieee80211vap *vap, struct mbuf *m,
847     const struct ieee80211_meshcntl *mc)
848 {
849 	struct ieee80211com *ic = vap->iv_ic;
850 	struct ieee80211_mesh_state *ms = vap->iv_mesh;
851 	struct ifnet *ifp = vap->iv_ifp;
852 	struct ifnet *parent = ic->ic_ifp;
853 	const struct ieee80211_frame *wh =
854 	    mtod(m, const struct ieee80211_frame *);
855 	struct mbuf *mcopy;
856 	struct ieee80211_meshcntl *mccopy;
857 	struct ieee80211_frame *whcopy;
858 	struct ieee80211_node *ni;
859 	int err;
860 
861 	if (mc->mc_ttl == 0) {
862 		IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
863 		    "%s", "frame not fwd'd, ttl 0");
864 		vap->iv_stats.is_mesh_fwd_ttl++;
865 		return;
866 	}
867 	if (!(ms->ms_flags & IEEE80211_MESHFLAGS_FWD)) {
868 		IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
869 		    "%s", "frame not fwd'd, fwding disabled");
870 		vap->iv_stats.is_mesh_fwd_disabled++;
871 		return;
872 	}
873 	mcopy = m_dup(m, MB_DONTWAIT);
874 	if (mcopy == NULL) {
875 		IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
876 		    "%s", "frame not fwd'd, cannot dup");
877 		vap->iv_stats.is_mesh_fwd_nobuf++;
878 		ifp->if_oerrors++;
879 		return;
880 	}
881 	mcopy = m_pullup(mcopy, ieee80211_hdrspace(ic, wh) +
882 	    sizeof(struct ieee80211_meshcntl));
883 	if (mcopy == NULL) {
884 		IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
885 		    "%s", "frame not fwd'd, too short");
886 		vap->iv_stats.is_mesh_fwd_tooshort++;
887 		ifp->if_oerrors++;
888 		m_freem(mcopy);
889 		return;
890 	}
891 	whcopy = mtod(mcopy, struct ieee80211_frame *);
892 	mccopy = (struct ieee80211_meshcntl *)
893 	    (mtod(mcopy, uint8_t *) + ieee80211_hdrspace(ic, wh));
894 	/* XXX clear other bits? */
895 	whcopy->i_fc[1] &= ~IEEE80211_FC1_RETRY;
896 	IEEE80211_ADDR_COPY(whcopy->i_addr2, vap->iv_myaddr);
897 	if (IEEE80211_IS_MULTICAST(wh->i_addr1)) {
898 		ni = ieee80211_ref_node(vap->iv_bss);
899 		mcopy->m_flags |= M_MCAST;
900 	} else {
901 		ni = mesh_find_txnode(vap, whcopy->i_addr3);
902 		if (ni == NULL) {
903 			IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
904 			    "%s", "frame not fwd'd, no path");
905 			vap->iv_stats.is_mesh_fwd_nopath++;
906 			m_freem(mcopy);
907 			return;
908 		}
909 		IEEE80211_ADDR_COPY(whcopy->i_addr1, ni->ni_macaddr);
910 	}
911 	KASSERT(mccopy->mc_ttl > 0, ("%s called with wrong ttl", __func__));
912 	mccopy->mc_ttl--;
913 
914 	/* XXX calculate priority so drivers can find the tx queue */
915 	M_WME_SETAC(mcopy, WME_AC_BE);
916 
917 	/* XXX do we know m_nextpkt is NULL? */
918 	mcopy->m_pkthdr.rcvif = (void *) ni;
919 	err = ieee80211_handoff(parent, mcopy);
920 	if (err != 0) {
921 		/* NB: IFQ_HANDOFF reclaims mbuf */
922 		ieee80211_free_node(ni);
923 	} else {
924 		ifp->if_opackets++;
925 	}
926 }
927 
928 static struct mbuf *
929 mesh_decap(struct ieee80211vap *vap, struct mbuf *m, int hdrlen, int meshdrlen)
930 {
931 #define	WHDIR(wh) ((wh)->i_fc[1] & IEEE80211_FC1_DIR_MASK)
932 	uint8_t b[sizeof(struct ieee80211_qosframe_addr4) +
933 		  sizeof(struct ieee80211_meshcntl_ae11)];
934 	const struct ieee80211_qosframe_addr4 *wh;
935 	const struct ieee80211_meshcntl_ae10 *mc;
936 	struct ether_header *eh;
937 	struct llc *llc;
938 	int ae;
939 
940 	if (m->m_len < hdrlen + sizeof(*llc) &&
941 	    (m = m_pullup(m, hdrlen + sizeof(*llc))) == NULL) {
942 		IEEE80211_DPRINTF(vap, IEEE80211_MSG_ANY,
943 		    "discard data frame: %s", "m_pullup failed");
944 		vap->iv_stats.is_rx_tooshort++;
945 		return NULL;
946 	}
947 	memcpy(b, mtod(m, caddr_t), hdrlen);
948 	wh = (const struct ieee80211_qosframe_addr4 *)&b[0];
949 	mc = (const struct ieee80211_meshcntl_ae10 *)&b[hdrlen - meshdrlen];
950 	KASSERT(WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS ||
951 		WHDIR(wh) == IEEE80211_FC1_DIR_DSTODS,
952 	    ("bogus dir, fc 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1]));
953 
954 	llc = (struct llc *)(mtod(m, caddr_t) + hdrlen);
955 	if (llc->llc_dsap == LLC_SNAP_LSAP && llc->llc_ssap == LLC_SNAP_LSAP &&
956 	    llc->llc_control == LLC_UI && llc->llc_snap.org_code[0] == 0 &&
957 	    llc->llc_snap.org_code[1] == 0 && llc->llc_snap.org_code[2] == 0 &&
958 	    /* NB: preserve AppleTalk frames that have a native SNAP hdr */
959 	    !(llc->llc_snap.ether_type == htons(ETHERTYPE_AARP) ||
960 	      llc->llc_snap.ether_type == htons(ETHERTYPE_IPX))) {
961 		m_adj(m, hdrlen + sizeof(struct llc) - sizeof(*eh));
962 		llc = NULL;
963 	} else {
964 		m_adj(m, hdrlen - sizeof(*eh));
965 	}
966 	eh = mtod(m, struct ether_header *);
967 	ae = mc->mc_flags & 3;
968 	if (WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS) {
969 		IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr1);
970 		if (ae == 0) {
971 			IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr3);
972 		} else if (ae == 1) {
973 			IEEE80211_ADDR_COPY(eh->ether_shost, mc->mc_addr4);
974 		} else {
975 			IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
976 			    (const struct ieee80211_frame *)wh, NULL,
977 			    "bad AE %d", ae);
978 			vap->iv_stats.is_mesh_badae++;
979 			m_freem(m);
980 			return NULL;
981 		}
982 	} else {
983 		if (ae == 0) {
984 			IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr3);
985 			IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr4);
986 		} else if (ae == 2) {
987 			IEEE80211_ADDR_COPY(eh->ether_dhost, mc->mc_addr4);
988 			IEEE80211_ADDR_COPY(eh->ether_shost, mc->mc_addr5);
989 		} else {
990 			IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
991 			    (const struct ieee80211_frame *)wh, NULL,
992 			    "bad AE %d", ae);
993 			vap->iv_stats.is_mesh_badae++;
994 			m_freem(m);
995 			return NULL;
996 		}
997 	}
998 #ifdef ALIGNED_POINTER
999 	if (!ALIGNED_POINTER(mtod(m, caddr_t) + sizeof(*eh), uint32_t)) {
1000 		m = ieee80211_realign(vap, m, sizeof(*eh));
1001 		if (m == NULL)
1002 			return NULL;
1003 	}
1004 #endif /* ALIGNED_POINTER */
1005 	if (llc != NULL) {
1006 		eh = mtod(m, struct ether_header *);
1007 		eh->ether_type = htons(m->m_pkthdr.len - sizeof(*eh));
1008 	}
1009 	return m;
1010 #undef WDIR
1011 }
1012 
1013 /*
1014  * Return non-zero if the unicast mesh data frame should be processed
1015  * locally.  Frames that are not proxy'd have our address, otherwise
1016  * we need to consult the routing table to look for a proxy entry.
1017  */
1018 static __inline int
1019 mesh_isucastforme(struct ieee80211vap *vap, const struct ieee80211_frame *wh,
1020     const struct ieee80211_meshcntl *mc)
1021 {
1022 	int ae = mc->mc_flags & 3;
1023 
1024 	KASSERT((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) == IEEE80211_FC1_DIR_DSTODS,
1025 	    ("bad dir 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1]));
1026 	KASSERT(ae == 0 || ae == 2, ("bad AE %d", ae));
1027 	if (ae == 2) {				/* ucast w/ proxy */
1028 		const struct ieee80211_meshcntl_ae10 *mc10 =
1029 		    (const struct ieee80211_meshcntl_ae10 *) mc;
1030 		struct ieee80211_mesh_route *rt =
1031 		    ieee80211_mesh_rt_find(vap, mc10->mc_addr4);
1032 		/* check for proxy route to ourself */
1033 		return (rt != NULL &&
1034 		    (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY));
1035 	} else					/* ucast w/o proxy */
1036 		return IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_myaddr);
1037 }
1038 
1039 static int
1040 mesh_input(struct ieee80211_node *ni, struct mbuf *m, int rssi, int nf)
1041 {
1042 #define	SEQ_LEQ(a,b)	((int)((a)-(b)) <= 0)
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 ((ni->ni_flags & IEEE80211_NODE_HT) == 0 &&
1097 			    (wh->i_fc[1] & IEEE80211_FC1_RETRY) &&
1098 			    SEQ_LEQ(rxseq, ni->ni_rxseqs[tid])) {
1099 				/* duplicate, discard */
1100 				IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
1101 				    wh->i_addr1, "duplicate",
1102 				    "seqno <%u,%u> fragno <%u,%u> tid %u",
1103 				    rxseq >> IEEE80211_SEQ_SEQ_SHIFT,
1104 				    ni->ni_rxseqs[tid] >>
1105 				    IEEE80211_SEQ_SEQ_SHIFT,
1106 				    rxseq & IEEE80211_SEQ_FRAG_MASK,
1107 				    ni->ni_rxseqs[tid] &
1108 				    IEEE80211_SEQ_FRAG_MASK,
1109 				    tid);
1110 				vap->iv_stats.is_rx_dup++;
1111 				IEEE80211_NODE_STAT(ni, rx_dup);
1112 				goto out;
1113 			}
1114 			ni->ni_rxseqs[tid] = rxseq;
1115 		}
1116 	}
1117 #ifdef IEEE80211_DEBUG
1118 	/*
1119 	 * It's easier, but too expensive, to simulate different mesh
1120 	 * topologies by consulting the ACL policy very early, so do this
1121 	 * only under DEBUG.
1122 	 *
1123 	 * NB: this check is also done upon peering link initiation.
1124 	 */
1125 	if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh->i_addr2)) {
1126 		IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL,
1127 		    wh, NULL, "%s", "disallowed by ACL");
1128 		vap->iv_stats.is_rx_acl++;
1129 		goto out;
1130 	}
1131 #endif
1132 	switch (type) {
1133 	case IEEE80211_FC0_TYPE_DATA:
1134 		if (ni == vap->iv_bss)
1135 			goto out;
1136 		if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) {
1137 			IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
1138 			    ni->ni_macaddr, NULL,
1139 			    "peer link not yet established (%d)",
1140 			    ni->ni_mlstate);
1141 			vap->iv_stats.is_mesh_nolink++;
1142 			goto out;
1143 		}
1144 		if (dir != IEEE80211_FC1_DIR_FROMDS &&
1145 		    dir != IEEE80211_FC1_DIR_DSTODS) {
1146 			IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1147 			    wh, "data", "incorrect dir 0x%x", dir);
1148 			vap->iv_stats.is_rx_wrongdir++;
1149 			goto err;
1150 		}
1151 		/* pull up enough to get to the mesh control */
1152 		hdrspace = ieee80211_hdrspace(ic, wh);
1153 		if (m->m_len < hdrspace + sizeof(struct ieee80211_meshcntl) &&
1154 		    (m = m_pullup(m, hdrspace +
1155 		        sizeof(struct ieee80211_meshcntl))) == NULL) {
1156 			IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1157 			    ni->ni_macaddr, NULL,
1158 			    "data too short: expecting %u", hdrspace);
1159 			vap->iv_stats.is_rx_tooshort++;
1160 			goto out;		/* XXX */
1161 		}
1162 		/*
1163 		 * Now calculate the full extent of the headers. Note
1164 		 * mesh_decap will pull up anything we didn't get
1165 		 * above when it strips the 802.11 headers.
1166 		 */
1167 		mc = (const struct ieee80211_meshcntl *)
1168 		    (mtod(m, const uint8_t *) + hdrspace);
1169 		meshdrlen = sizeof(struct ieee80211_meshcntl) +
1170 		    (mc->mc_flags & 3) * IEEE80211_ADDR_LEN;
1171 		hdrspace += meshdrlen;
1172 		seq = LE_READ_4(mc->mc_seq);
1173 		if (IEEE80211_IS_MULTICAST(wh->i_addr1))
1174 			addr = wh->i_addr3;
1175 		else
1176 			addr = ((struct ieee80211_qosframe_addr4 *)wh)->i_addr4;
1177 		if (IEEE80211_ADDR_EQ(vap->iv_myaddr, addr)) {
1178 			IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
1179 			    addr, "data", "%s", "not to me");
1180 			vap->iv_stats.is_rx_wrongbss++;	/* XXX kinda */
1181 			goto out;
1182 		}
1183 		if (mesh_checkpseq(vap, addr, seq) != 0) {
1184 			vap->iv_stats.is_rx_dup++;
1185 			goto out;
1186 		}
1187 
1188 		/*
1189 		 * Potentially forward packet.  See table s36 (p140)
1190 		 * for the rules.  XXX tap fwd'd packets not for us?
1191 		 */
1192 		if (dir == IEEE80211_FC1_DIR_FROMDS ||
1193 		    !mesh_isucastforme(vap, wh, mc)) {
1194 			mesh_forward(vap, m, mc);
1195 			if (dir == IEEE80211_FC1_DIR_DSTODS)
1196 				goto out;
1197 			/* NB: fall thru to deliver mcast frames locally */
1198 		}
1199 
1200 		/*
1201 		 * Save QoS bits for use below--before we strip the header.
1202 		 */
1203 		if (subtype == IEEE80211_FC0_SUBTYPE_QOS) {
1204 			qos = (dir == IEEE80211_FC1_DIR_DSTODS) ?
1205 			    ((struct ieee80211_qosframe_addr4 *)wh)->i_qos[0] :
1206 			    ((struct ieee80211_qosframe *)wh)->i_qos[0];
1207 		} else
1208 			qos = 0;
1209 		/*
1210 		 * Next up, any fragmentation.
1211 		 */
1212 		if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1213 			m = ieee80211_defrag(ni, m, hdrspace);
1214 			if (m == NULL) {
1215 				/* Fragment dropped or frame not complete yet */
1216 				goto out;
1217 			}
1218 		}
1219 		wh = NULL;		/* no longer valid, catch any uses */
1220 
1221 		if (ieee80211_radiotap_active_vap(vap))
1222 			ieee80211_radiotap_rx(vap, m);
1223 		need_tap = 0;
1224 
1225 		/*
1226 		 * Finally, strip the 802.11 header.
1227 		 */
1228 		m = mesh_decap(vap, m, hdrspace, meshdrlen);
1229 		if (m == NULL) {
1230 			/* XXX mask bit to check for both */
1231 			/* don't count Null data frames as errors */
1232 			if (subtype == IEEE80211_FC0_SUBTYPE_NODATA ||
1233 			    subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL)
1234 				goto out;
1235 			IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
1236 			    ni->ni_macaddr, "data", "%s", "decap error");
1237 			vap->iv_stats.is_rx_decap++;
1238 			IEEE80211_NODE_STAT(ni, rx_decap);
1239 			goto err;
1240 		}
1241 		if (qos & IEEE80211_QOS_AMSDU) {
1242 			m = ieee80211_decap_amsdu(ni, m);
1243 			if (m == NULL)
1244 				return IEEE80211_FC0_TYPE_DATA;
1245 		}
1246 		ieee80211_deliver_data(vap, ni, m);
1247 		return type;
1248 	case IEEE80211_FC0_TYPE_MGT:
1249 		vap->iv_stats.is_rx_mgmt++;
1250 		IEEE80211_NODE_STAT(ni, rx_mgmt);
1251 		if (dir != IEEE80211_FC1_DIR_NODS) {
1252 			IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1253 			    wh, "mgt", "incorrect dir 0x%x", dir);
1254 			vap->iv_stats.is_rx_wrongdir++;
1255 			goto err;
1256 		}
1257 		if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) {
1258 			IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1259 			    ni->ni_macaddr, "mgt", "too short: len %u",
1260 			    m->m_pkthdr.len);
1261 			vap->iv_stats.is_rx_tooshort++;
1262 			goto out;
1263 		}
1264 #ifdef IEEE80211_DEBUG
1265 		if ((ieee80211_msg_debug(vap) &&
1266 		    (vap->iv_ic->ic_flags & IEEE80211_F_SCAN)) ||
1267 		    ieee80211_msg_dumppkts(vap)) {
1268 			if_printf(ifp, "received %s from %6D rssi %d\n",
1269 			    ieee80211_mgt_subtype_name[subtype >>
1270 			    IEEE80211_FC0_SUBTYPE_SHIFT],
1271 			    wh->i_addr2, ":", rssi);
1272 		}
1273 #endif
1274 		if (wh->i_fc[1] & IEEE80211_FC1_WEP) {
1275 			IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1276 			    wh, NULL, "%s", "WEP set but not permitted");
1277 			vap->iv_stats.is_rx_mgtdiscard++; /* XXX */
1278 			goto out;
1279 		}
1280 		vap->iv_recv_mgmt(ni, m, subtype, rssi, nf);
1281 		goto out;
1282 	case IEEE80211_FC0_TYPE_CTL:
1283 		vap->iv_stats.is_rx_ctl++;
1284 		IEEE80211_NODE_STAT(ni, rx_ctrl);
1285 		goto out;
1286 	default:
1287 		IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1288 		    wh, "bad", "frame type 0x%x", type);
1289 		/* should not come here */
1290 		break;
1291 	}
1292 err:
1293 	ifp->if_ierrors++;
1294 out:
1295 	if (m != NULL) {
1296 		if (need_tap && ieee80211_radiotap_active_vap(vap))
1297 			ieee80211_radiotap_rx(vap, m);
1298 		m_freem(m);
1299 	}
1300 	return type;
1301 }
1302 
1303 static void
1304 mesh_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, int subtype,
1305     int rssi, int nf)
1306 {
1307 	struct ieee80211vap *vap = ni->ni_vap;
1308 	struct ieee80211_mesh_state *ms = vap->iv_mesh;
1309 	struct ieee80211com *ic = ni->ni_ic;
1310 	struct ieee80211_frame *wh;
1311 	uint8_t *frm, *efrm;
1312 
1313 	wh = mtod(m0, struct ieee80211_frame *);
1314 	frm = (uint8_t *)&wh[1];
1315 	efrm = mtod(m0, uint8_t *) + m0->m_len;
1316 	switch (subtype) {
1317 	case IEEE80211_FC0_SUBTYPE_PROBE_RESP:
1318 	case IEEE80211_FC0_SUBTYPE_BEACON:
1319 	{
1320 		struct ieee80211_scanparams scan;
1321 		/*
1322 		 * We process beacon/probe response
1323 		 * frames to discover neighbors.
1324 		 */
1325 		if (ieee80211_parse_beacon(ni, m0, &scan) != 0)
1326 			return;
1327 		/*
1328 		 * Count frame now that we know it's to be processed.
1329 		 */
1330 		if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) {
1331 			vap->iv_stats.is_rx_beacon++;	/* XXX remove */
1332 			IEEE80211_NODE_STAT(ni, rx_beacons);
1333 		} else
1334 			IEEE80211_NODE_STAT(ni, rx_proberesp);
1335 		/*
1336 		 * If scanning, just pass information to the scan module.
1337 		 */
1338 		if (ic->ic_flags & IEEE80211_F_SCAN) {
1339 			if (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN) {
1340 				/*
1341 				 * Actively scanning a channel marked passive;
1342 				 * send a probe request now that we know there
1343 				 * is 802.11 traffic present.
1344 				 *
1345 				 * XXX check if the beacon we recv'd gives
1346 				 * us what we need and suppress the probe req
1347 				 */
1348 				ieee80211_probe_curchan(vap, 1);
1349 				ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN;
1350 			}
1351 			ieee80211_add_scan(vap, &scan, wh,
1352 			    subtype, rssi, nf);
1353 			return;
1354 		}
1355 
1356 		/* The rest of this code assumes we are running */
1357 		if (vap->iv_state != IEEE80211_S_RUN)
1358 			return;
1359 		/*
1360 		 * Ignore non-mesh STAs.
1361 		 */
1362 		if ((scan.capinfo &
1363 		     (IEEE80211_CAPINFO_ESS|IEEE80211_CAPINFO_IBSS)) ||
1364 		    scan.meshid == NULL || scan.meshconf == NULL) {
1365 			IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1366 			    wh, "beacon", "%s", "not a mesh sta");
1367 			vap->iv_stats.is_mesh_wrongmesh++;
1368 			return;
1369 		}
1370 		/*
1371 		 * Ignore STAs for other mesh networks.
1372 		 */
1373 		if (memcmp(scan.meshid+2, ms->ms_id, ms->ms_idlen) != 0 ||
1374 		    mesh_verify_meshconf(vap, scan.meshconf)) {
1375 			IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1376 			    wh, "beacon", "%s", "not for our mesh");
1377 			vap->iv_stats.is_mesh_wrongmesh++;
1378 			return;
1379 		}
1380 		/*
1381 		 * Peer only based on the current ACL policy.
1382 		 */
1383 		if (vap->iv_acl != NULL &&
1384 		    !vap->iv_acl->iac_check(vap, wh->i_addr2)) {
1385 			IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL,
1386 			    wh, NULL, "%s", "disallowed by ACL");
1387 			vap->iv_stats.is_rx_acl++;
1388 			return;
1389 		}
1390 		/*
1391 		 * Do neighbor discovery.
1392 		 */
1393 		if (!IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_macaddr)) {
1394 			/*
1395 			 * Create a new entry in the neighbor table.
1396 			 */
1397 			ni = ieee80211_add_neighbor(vap, wh, &scan);
1398 		}
1399 		/*
1400 		 * Automatically peer with discovered nodes if possible.
1401 		 * XXX backoff on repeated failure
1402 		 */
1403 		if (ni != vap->iv_bss &&
1404 		    (ms->ms_flags & IEEE80211_MESHFLAGS_AP) &&
1405 		    ni->ni_mlstate == IEEE80211_NODE_MESH_IDLE) {
1406 			uint16_t args[1];
1407 
1408 			ni->ni_mlpid = mesh_generateid(vap);
1409 			if (ni->ni_mlpid == 0)
1410 				return;
1411 			mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENSNT);
1412 			args[0] = ni->ni_mlpid;
1413 			ieee80211_send_action(ni,
1414 			    IEEE80211_ACTION_CAT_MESHPEERING,
1415 			    IEEE80211_ACTION_MESHPEERING_OPEN, args);
1416 			ni->ni_mlrcnt = 0;
1417 			mesh_peer_timeout_setup(ni);
1418 		}
1419 		break;
1420 	}
1421 	case IEEE80211_FC0_SUBTYPE_PROBE_REQ:
1422 	{
1423 		uint8_t *ssid, *meshid, *rates, *xrates;
1424 		uint8_t *sfrm;
1425 
1426 		if (vap->iv_state != IEEE80211_S_RUN) {
1427 			IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1428 			    wh, NULL, "wrong state %s",
1429 			    ieee80211_state_name[vap->iv_state]);
1430 			vap->iv_stats.is_rx_mgtdiscard++;
1431 			return;
1432 		}
1433 		if (IEEE80211_IS_MULTICAST(wh->i_addr2)) {
1434 			/* frame must be directed */
1435 			IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1436 			    wh, NULL, "%s", "not unicast");
1437 			vap->iv_stats.is_rx_mgtdiscard++;	/* XXX stat */
1438 			return;
1439 		}
1440 		/*
1441 		 * prreq frame format
1442 		 *      [tlv] ssid
1443 		 *      [tlv] supported rates
1444 		 *      [tlv] extended supported rates
1445 		 *	[tlv] mesh id
1446 		 */
1447 		ssid = meshid = rates = xrates = NULL;
1448 		sfrm = frm;
1449 		while (efrm - frm > 1) {
1450 			IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return);
1451 			switch (*frm) {
1452 			case IEEE80211_ELEMID_SSID:
1453 				ssid = frm;
1454 				break;
1455 			case IEEE80211_ELEMID_RATES:
1456 				rates = frm;
1457 				break;
1458 			case IEEE80211_ELEMID_XRATES:
1459 				xrates = frm;
1460 				break;
1461 			case IEEE80211_ELEMID_MESHID:
1462 				meshid = frm;
1463 				break;
1464 			}
1465 			frm += frm[2] + 2;
1466 		}
1467 		IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return);
1468 		IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return);
1469 		if (xrates != NULL)
1470 			IEEE80211_VERIFY_ELEMENT(xrates,
1471 			    IEEE80211_RATE_MAXSIZE - rates[1], return);
1472 		if (meshid != NULL) {
1473 			IEEE80211_VERIFY_ELEMENT(meshid,
1474 			    IEEE80211_MESHID_LEN, return);
1475 			/* NB: meshid, not ssid */
1476 			IEEE80211_VERIFY_SSID(vap->iv_bss, meshid, return);
1477 		}
1478 
1479 		/* XXX find a better class or define it's own */
1480 		IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_INPUT, wh->i_addr2,
1481 		    "%s", "recv probe req");
1482 		/*
1483 		 * Some legacy 11b clients cannot hack a complete
1484 		 * probe response frame.  When the request includes
1485 		 * only a bare-bones rate set, communicate this to
1486 		 * the transmit side.
1487 		 */
1488 		ieee80211_send_proberesp(vap, wh->i_addr2, 0);
1489 		break;
1490 	}
1491 	case IEEE80211_FC0_SUBTYPE_ACTION:
1492 		if (vap->iv_state != IEEE80211_S_RUN) {
1493 			vap->iv_stats.is_rx_mgtdiscard++;
1494 			break;
1495 		}
1496 		/*
1497 		 * We received an action for an unknown neighbor.
1498 		 * XXX: wait for it to beacon or create ieee80211_node?
1499 		 */
1500 		if (ni == vap->iv_bss) {
1501 			IEEE80211_DISCARD(vap, IEEE80211_MSG_MESH,
1502 			    wh, NULL, "%s", "unknown node");
1503 			vap->iv_stats.is_rx_mgtdiscard++;
1504 			break;
1505 		}
1506 		/*
1507 		 * Discard if not for us.
1508 		 */
1509 		if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) &&
1510 		    !IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1511 			IEEE80211_DISCARD(vap, IEEE80211_MSG_MESH,
1512 			    wh, NULL, "%s", "not for me");
1513 			vap->iv_stats.is_rx_mgtdiscard++;
1514 			break;
1515 		}
1516 		/* XXX parse_action is a bit useless now */
1517 		if (ieee80211_parse_action(ni, m0) == 0)
1518 			ic->ic_recv_action(ni, wh, frm, efrm);
1519 		break;
1520 	case IEEE80211_FC0_SUBTYPE_AUTH:
1521 	case IEEE80211_FC0_SUBTYPE_ASSOC_REQ:
1522 	case IEEE80211_FC0_SUBTYPE_REASSOC_REQ:
1523 	case IEEE80211_FC0_SUBTYPE_ASSOC_RESP:
1524 	case IEEE80211_FC0_SUBTYPE_REASSOC_RESP:
1525 	case IEEE80211_FC0_SUBTYPE_DEAUTH:
1526 	case IEEE80211_FC0_SUBTYPE_DISASSOC:
1527 		IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1528 		    wh, NULL, "%s", "not handled");
1529 		vap->iv_stats.is_rx_mgtdiscard++;
1530 		return;
1531 	default:
1532 		IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1533 		    wh, "mgt", "subtype 0x%x not handled", subtype);
1534 		vap->iv_stats.is_rx_badsubtype++;
1535 		break;
1536 	}
1537 }
1538 
1539 /*
1540  * Parse meshpeering action ie's for open+confirm frames; the
1541  * important bits are returned in the supplied structure.
1542  */
1543 static const struct ieee80211_meshpeer_ie *
1544 mesh_parse_meshpeering_action(struct ieee80211_node *ni,
1545 	const struct ieee80211_frame *wh,	/* XXX for VERIFY_LENGTH */
1546 	const uint8_t *frm, const uint8_t *efrm,
1547 	struct ieee80211_meshpeer_ie *mp, uint8_t subtype)
1548 {
1549 	struct ieee80211vap *vap = ni->ni_vap;
1550 	const struct ieee80211_meshpeer_ie *mpie;
1551 	const uint8_t *meshid, *meshconf, *meshpeer;
1552 
1553 	meshid = meshconf = meshpeer = NULL;
1554 	while (efrm - frm > 1) {
1555 		IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return NULL);
1556 		switch (*frm) {
1557 		case IEEE80211_ELEMID_MESHID:
1558 			meshid = frm;
1559 			break;
1560 		case IEEE80211_ELEMID_MESHCONF:
1561 			meshconf = frm;
1562 			break;
1563 		case IEEE80211_ELEMID_MESHPEER:
1564 			meshpeer = frm;
1565 			mpie = (const struct ieee80211_meshpeer_ie *) frm;
1566 			memset(mp, 0, sizeof(*mp));
1567 			mp->peer_llinkid = LE_READ_2(&mpie->peer_llinkid);
1568 			/* NB: peer link ID is optional on these frames */
1569 			if (subtype == IEEE80211_MESH_PEER_LINK_CLOSE &&
1570 			    mpie->peer_len == 8) {
1571 				mp->peer_linkid = 0;
1572 				mp->peer_rcode = LE_READ_2(&mpie->peer_linkid);
1573 			} else {
1574 				mp->peer_linkid = LE_READ_2(&mpie->peer_linkid);
1575 				mp->peer_rcode = LE_READ_2(&mpie->peer_rcode);
1576 			}
1577 			break;
1578 		}
1579 		frm += frm[1] + 2;
1580 	}
1581 
1582 	/*
1583 	 * Verify the contents of the frame. Action frames with
1584 	 * close subtype don't have a Mesh Configuration IE.
1585 	 * If if fails validation, close the peer link.
1586 	 */
1587 	KASSERT(meshpeer != NULL &&
1588 	    subtype != IEEE80211_ACTION_MESHPEERING_CLOSE,
1589 	    ("parsing close action"));
1590 
1591 	if (mesh_verify_meshid(vap, meshid) ||
1592 	    mesh_verify_meshpeer(vap, subtype, meshpeer) ||
1593 	    mesh_verify_meshconf(vap, meshconf)) {
1594 		uint16_t args[3];
1595 
1596 		IEEE80211_DISCARD(vap,
1597 		    IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
1598 		    wh, NULL, "%s", "not for our mesh");
1599 		vap->iv_stats.is_rx_mgtdiscard++;
1600 		switch (ni->ni_mlstate) {
1601 		case IEEE80211_NODE_MESH_IDLE:
1602 		case IEEE80211_NODE_MESH_ESTABLISHED:
1603 		case IEEE80211_NODE_MESH_HOLDING:
1604 			/* ignore */
1605 			break;
1606 		case IEEE80211_NODE_MESH_OPENSNT:
1607 		case IEEE80211_NODE_MESH_OPENRCV:
1608 		case IEEE80211_NODE_MESH_CONFIRMRCV:
1609 			args[0] = ni->ni_mlpid;
1610 			args[1] = ni->ni_mllid;
1611 			args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
1612 			ieee80211_send_action(ni,
1613 			    IEEE80211_ACTION_CAT_MESHPEERING,
1614 			    IEEE80211_ACTION_MESHPEERING_CLOSE,
1615 			    args);
1616 			mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
1617 			mesh_peer_timeout_setup(ni);
1618 			break;
1619 		}
1620 		return NULL;
1621 	}
1622 	return (const struct ieee80211_meshpeer_ie *) mp;
1623 }
1624 
1625 static int
1626 mesh_recv_action_meshpeering_open(struct ieee80211_node *ni,
1627 	const struct ieee80211_frame *wh,
1628 	const uint8_t *frm, const uint8_t *efrm)
1629 {
1630 	struct ieee80211vap *vap = ni->ni_vap;
1631 	struct ieee80211_meshpeer_ie ie;
1632 	const struct ieee80211_meshpeer_ie *meshpeer;
1633 	uint16_t args[3];
1634 
1635 	/* +2+2 for action + code + capabilites */
1636 	meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2, efrm, &ie,
1637 	    IEEE80211_ACTION_MESHPEERING_OPEN);
1638 	if (meshpeer == NULL) {
1639 		return 0;
1640 	}
1641 
1642 	/* XXX move up */
1643 	IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
1644 	    "recv PEER OPEN, lid 0x%x", meshpeer->peer_llinkid);
1645 
1646 	switch (ni->ni_mlstate) {
1647 	case IEEE80211_NODE_MESH_IDLE:
1648 		mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV);
1649 		ni->ni_mllid = meshpeer->peer_llinkid;
1650 		ni->ni_mlpid = mesh_generateid(vap);
1651 		if (ni->ni_mlpid == 0)
1652 			return 0;		/* XXX */
1653 		args[0] = ni->ni_mlpid;
1654 		/* Announce we're open too... */
1655 		ieee80211_send_action(ni,
1656 		    IEEE80211_ACTION_CAT_MESHPEERING,
1657 		    IEEE80211_ACTION_MESHPEERING_OPEN, args);
1658 		/* ...and confirm the link. */
1659 		args[0] = ni->ni_mlpid;
1660 		args[1] = ni->ni_mllid;
1661 		ieee80211_send_action(ni,
1662 		    IEEE80211_ACTION_CAT_MESHPEERING,
1663 		    IEEE80211_ACTION_MESHPEERING_CONFIRM,
1664 		    args);
1665 		mesh_peer_timeout_setup(ni);
1666 		break;
1667 	case IEEE80211_NODE_MESH_OPENRCV:
1668 		/* Wrong Link ID */
1669 		if (ni->ni_mllid != meshpeer->peer_llinkid) {
1670 			args[0] = ni->ni_mllid;
1671 			args[1] = ni->ni_mlpid;
1672 			args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
1673 			ieee80211_send_action(ni,
1674 			    IEEE80211_ACTION_CAT_MESHPEERING,
1675 			    IEEE80211_ACTION_MESHPEERING_CLOSE,
1676 			    args);
1677 			mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
1678 			mesh_peer_timeout_setup(ni);
1679 			break;
1680 		}
1681 		/* Duplicate open, confirm again. */
1682 		args[0] = ni->ni_mlpid;
1683 		args[1] = ni->ni_mllid;
1684 		ieee80211_send_action(ni,
1685 		    IEEE80211_ACTION_CAT_MESHPEERING,
1686 		    IEEE80211_ACTION_MESHPEERING_CONFIRM,
1687 		    args);
1688 		break;
1689 	case IEEE80211_NODE_MESH_OPENSNT:
1690 		ni->ni_mllid = meshpeer->peer_llinkid;
1691 		mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV);
1692 		args[0] = ni->ni_mlpid;
1693 		args[1] = ni->ni_mllid;
1694 		ieee80211_send_action(ni,
1695 		    IEEE80211_ACTION_CAT_MESHPEERING,
1696 		    IEEE80211_ACTION_MESHPEERING_CONFIRM,
1697 		    args);
1698 		/* NB: don't setup/clear any timeout */
1699 		break;
1700 	case IEEE80211_NODE_MESH_CONFIRMRCV:
1701 		if (ni->ni_mlpid != meshpeer->peer_linkid ||
1702 		    ni->ni_mllid != meshpeer->peer_llinkid) {
1703 			args[0] = ni->ni_mlpid;
1704 			args[1] = ni->ni_mllid;
1705 			args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
1706 			ieee80211_send_action(ni,
1707 			    IEEE80211_ACTION_CAT_MESHPEERING,
1708 			    IEEE80211_ACTION_MESHPEERING_CLOSE,
1709 			    args);
1710 			mesh_linkchange(ni,
1711 			    IEEE80211_NODE_MESH_HOLDING);
1712 			mesh_peer_timeout_setup(ni);
1713 			break;
1714 		}
1715 		mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED);
1716 		ni->ni_mllid = meshpeer->peer_llinkid;
1717 		args[0] = ni->ni_mlpid;
1718 		args[1] = ni->ni_mllid;
1719 		ieee80211_send_action(ni,
1720 		    IEEE80211_ACTION_CAT_MESHPEERING,
1721 		    IEEE80211_ACTION_MESHPEERING_CONFIRM,
1722 		    args);
1723 		mesh_peer_timeout_stop(ni);
1724 		break;
1725 	case IEEE80211_NODE_MESH_ESTABLISHED:
1726 		if (ni->ni_mllid != meshpeer->peer_llinkid) {
1727 			args[0] = ni->ni_mllid;
1728 			args[1] = ni->ni_mlpid;
1729 			args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
1730 			ieee80211_send_action(ni,
1731 			    IEEE80211_ACTION_CAT_MESHPEERING,
1732 			    IEEE80211_ACTION_MESHPEERING_CLOSE,
1733 			    args);
1734 			mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
1735 			mesh_peer_timeout_setup(ni);
1736 			break;
1737 		}
1738 		args[0] = ni->ni_mlpid;
1739 		args[1] = ni->ni_mllid;
1740 		ieee80211_send_action(ni,
1741 		    IEEE80211_ACTION_CAT_MESHPEERING,
1742 		    IEEE80211_ACTION_MESHPEERING_CONFIRM,
1743 		    args);
1744 		break;
1745 	case IEEE80211_NODE_MESH_HOLDING:
1746 		args[0] = ni->ni_mlpid;
1747 		args[1] = meshpeer->peer_llinkid;
1748 		args[2] = IEEE80211_REASON_MESH_MAX_RETRIES;
1749 		ieee80211_send_action(ni,
1750 		    IEEE80211_ACTION_CAT_MESHPEERING,
1751 		    IEEE80211_ACTION_MESHPEERING_CLOSE,
1752 		    args);
1753 		break;
1754 	}
1755 	return 0;
1756 }
1757 
1758 static int
1759 mesh_recv_action_meshpeering_confirm(struct ieee80211_node *ni,
1760 	const struct ieee80211_frame *wh,
1761 	const uint8_t *frm, const uint8_t *efrm)
1762 {
1763 	struct ieee80211vap *vap = ni->ni_vap;
1764 	struct ieee80211_meshpeer_ie ie;
1765 	const struct ieee80211_meshpeer_ie *meshpeer;
1766 	uint16_t args[3];
1767 
1768 	/* +2+2+2+2 for action + code + capabilites + status code + AID */
1769 	meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2+2+2, efrm, &ie,
1770 	    IEEE80211_ACTION_MESHPEERING_CONFIRM);
1771 	if (meshpeer == NULL) {
1772 		return 0;
1773 	}
1774 
1775 	IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
1776 	    "recv PEER CONFIRM, local id 0x%x, peer id 0x%x",
1777 	    meshpeer->peer_llinkid, meshpeer->peer_linkid);
1778 
1779 	switch (ni->ni_mlstate) {
1780 	case IEEE80211_NODE_MESH_OPENRCV:
1781 		mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED);
1782 		mesh_peer_timeout_stop(ni);
1783 		break;
1784 	case IEEE80211_NODE_MESH_OPENSNT:
1785 		mesh_linkchange(ni, IEEE80211_NODE_MESH_CONFIRMRCV);
1786 		break;
1787 	case IEEE80211_NODE_MESH_HOLDING:
1788 		args[0] = ni->ni_mlpid;
1789 		args[1] = meshpeer->peer_llinkid;
1790 		args[2] = IEEE80211_REASON_MESH_MAX_RETRIES;
1791 		ieee80211_send_action(ni,
1792 		    IEEE80211_ACTION_CAT_MESHPEERING,
1793 		    IEEE80211_ACTION_MESHPEERING_CLOSE,
1794 		    args);
1795 		break;
1796 	case IEEE80211_NODE_MESH_CONFIRMRCV:
1797 		if (ni->ni_mllid != meshpeer->peer_llinkid) {
1798 			args[0] = ni->ni_mlpid;
1799 			args[1] = ni->ni_mllid;
1800 			args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
1801 			ieee80211_send_action(ni,
1802 			    IEEE80211_ACTION_CAT_MESHPEERING,
1803 			    IEEE80211_ACTION_MESHPEERING_CLOSE,
1804 			    args);
1805 			mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
1806 			mesh_peer_timeout_setup(ni);
1807 		}
1808 		break;
1809 	default:
1810 		IEEE80211_DISCARD(vap,
1811 		    IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
1812 		    wh, NULL, "received confirm in invalid state %d",
1813 		    ni->ni_mlstate);
1814 		vap->iv_stats.is_rx_mgtdiscard++;
1815 		break;
1816 	}
1817 	return 0;
1818 }
1819 
1820 static int
1821 mesh_recv_action_meshpeering_close(struct ieee80211_node *ni,
1822 	const struct ieee80211_frame *wh,
1823 	const uint8_t *frm, const uint8_t *efrm)
1824 {
1825 	uint16_t args[3];
1826 
1827 	IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
1828 	    ni, "%s", "recv PEER CLOSE");
1829 
1830 	switch (ni->ni_mlstate) {
1831 	case IEEE80211_NODE_MESH_IDLE:
1832 		/* ignore */
1833 		break;
1834 	case IEEE80211_NODE_MESH_OPENRCV:
1835 	case IEEE80211_NODE_MESH_OPENSNT:
1836 	case IEEE80211_NODE_MESH_CONFIRMRCV:
1837 	case IEEE80211_NODE_MESH_ESTABLISHED:
1838 		args[0] = ni->ni_mlpid;
1839 		args[1] = ni->ni_mllid;
1840 		args[2] = IEEE80211_REASON_MESH_CLOSE_RCVD;
1841 		ieee80211_send_action(ni,
1842 		    IEEE80211_ACTION_CAT_MESHPEERING,
1843 		    IEEE80211_ACTION_MESHPEERING_CLOSE,
1844 		    args);
1845 		mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
1846 		mesh_peer_timeout_setup(ni);
1847 		break;
1848 	case IEEE80211_NODE_MESH_HOLDING:
1849 		mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE);
1850 		mesh_peer_timeout_setup(ni);
1851 		break;
1852 	}
1853 	return 0;
1854 }
1855 
1856 /*
1857  * Link Metric handling.
1858  */
1859 static int
1860 mesh_recv_action_meshlmetric_req(struct ieee80211_node *ni,
1861 	const struct ieee80211_frame *wh,
1862 	const uint8_t *frm, const uint8_t *efrm)
1863 {
1864 	uint32_t metric;
1865 
1866 	metric = mesh_airtime_calc(ni);
1867 	ieee80211_send_action(ni,
1868 	    IEEE80211_ACTION_CAT_MESHLMETRIC,
1869 	    IEEE80211_ACTION_MESHLMETRIC_REP,
1870 	    &metric);
1871 	return 0;
1872 }
1873 
1874 static int
1875 mesh_recv_action_meshlmetric_rep(struct ieee80211_node *ni,
1876 	const struct ieee80211_frame *wh,
1877 	const uint8_t *frm, const uint8_t *efrm)
1878 {
1879 	return 0;
1880 }
1881 
1882 static int
1883 mesh_send_action(struct ieee80211_node *ni, struct mbuf *m)
1884 {
1885 	struct ieee80211_bpf_params params;
1886 
1887 	memset(&params, 0, sizeof(params));
1888 	params.ibp_pri = WME_AC_VO;
1889 	params.ibp_rate0 = ni->ni_txparms->mgmtrate;
1890 	/* XXX ucast/mcast */
1891 	params.ibp_try0 = ni->ni_txparms->maxretry;
1892 	params.ibp_power = ni->ni_txpower;
1893 	return ieee80211_mgmt_output(ni, m, IEEE80211_FC0_SUBTYPE_ACTION,
1894 	     &params);
1895 }
1896 
1897 #define	ADDSHORT(frm, v) do {			\
1898 	frm[0] = (v) & 0xff;			\
1899 	frm[1] = (v) >> 8;			\
1900 	frm += 2;				\
1901 } while (0)
1902 #define	ADDWORD(frm, v) do {			\
1903 	frm[0] = (v) & 0xff;			\
1904 	frm[1] = ((v) >> 8) & 0xff;		\
1905 	frm[2] = ((v) >> 16) & 0xff;		\
1906 	frm[3] = ((v) >> 24) & 0xff;		\
1907 	frm += 4;				\
1908 } while (0)
1909 
1910 static int
1911 mesh_send_action_meshpeering_open(struct ieee80211_node *ni,
1912 	int category, int action, void *args0)
1913 {
1914 	struct ieee80211vap *vap = ni->ni_vap;
1915 	struct ieee80211com *ic = ni->ni_ic;
1916 	uint16_t *args = args0;
1917 	const struct ieee80211_rateset *rs;
1918 	struct mbuf *m;
1919 	uint8_t *frm;
1920 
1921 	IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
1922 	    "send PEER OPEN action: localid 0x%x", args[0]);
1923 
1924 	IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
1925 	    "ieee80211_ref_node (%s:%u) %p<%6D> refcnt %d\n", __func__, __LINE__,
1926 	    ni, ni->ni_macaddr, ":", ieee80211_node_refcnt(ni)+1);
1927 	ieee80211_ref_node(ni);
1928 
1929 	m = ieee80211_getmgtframe(&frm,
1930 	    ic->ic_headroom + sizeof(struct ieee80211_frame),
1931 	    sizeof(uint16_t)	/* action+category */
1932 	    + sizeof(uint16_t)	/* capabilites */
1933 	    + 2 + IEEE80211_RATE_SIZE
1934 	    + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
1935 	    + 2 + IEEE80211_MESHID_LEN
1936 	    + sizeof(struct ieee80211_meshconf_ie)
1937 	    + sizeof(struct ieee80211_meshpeer_ie)
1938 	);
1939 	if (m != NULL) {
1940 		/*
1941 		 * mesh peer open action frame format:
1942 		 *   [1] category
1943 		 *   [1] action
1944 		 *   [2] capabilities
1945 		 *   [tlv] rates
1946 		 *   [tlv] xrates
1947 		 *   [tlv] mesh id
1948 		 *   [tlv] mesh conf
1949 		 *   [tlv] mesh peer link mgmt
1950 		 */
1951 		*frm++ = category;
1952 		*frm++ = action;
1953 		ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan));
1954 		rs = ieee80211_get_suprates(ic, ic->ic_curchan);
1955 		frm = ieee80211_add_rates(frm, rs);
1956 		frm = ieee80211_add_xrates(frm, rs);
1957 		frm = ieee80211_add_meshid(frm, vap);
1958 		frm = ieee80211_add_meshconf(frm, vap);
1959 		frm = ieee80211_add_meshpeer(frm, IEEE80211_MESH_PEER_LINK_OPEN,
1960 		    args[0], 0, 0);
1961 		m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
1962 		return mesh_send_action(ni, m);
1963 	} else {
1964 		vap->iv_stats.is_tx_nobuf++;
1965 		ieee80211_free_node(ni);
1966 		return ENOMEM;
1967 	}
1968 }
1969 
1970 static int
1971 mesh_send_action_meshpeering_confirm(struct ieee80211_node *ni,
1972 	int category, int action, void *args0)
1973 {
1974 	struct ieee80211vap *vap = ni->ni_vap;
1975 	struct ieee80211com *ic = ni->ni_ic;
1976 	uint16_t *args = args0;
1977 	const struct ieee80211_rateset *rs;
1978 	struct mbuf *m;
1979 	uint8_t *frm;
1980 
1981 	IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
1982 	    "send PEER CONFIRM action: localid 0x%x, peerid 0x%x",
1983 	    args[0], args[1]);
1984 
1985 	IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
1986 	    "ieee80211_ref_node (%s:%u) %p<%6D> refcnt %d\n", __func__, __LINE__,
1987 	    ni, ni->ni_macaddr, ":", ieee80211_node_refcnt(ni)+1);
1988 	ieee80211_ref_node(ni);
1989 
1990 	m = ieee80211_getmgtframe(&frm,
1991 	    ic->ic_headroom + sizeof(struct ieee80211_frame),
1992 	    sizeof(uint16_t)	/* action+category */
1993 	    + sizeof(uint16_t)	/* capabilites */
1994 	    + sizeof(uint16_t)	/* status code */
1995 	    + sizeof(uint16_t)	/* AID */
1996 	    + 2 + IEEE80211_RATE_SIZE
1997 	    + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
1998 	    + 2 + IEEE80211_MESHID_LEN
1999 	    + sizeof(struct ieee80211_meshconf_ie)
2000 	    + sizeof(struct ieee80211_meshpeer_ie)
2001 	);
2002 	if (m != NULL) {
2003 		/*
2004 		 * mesh peer confirm action frame format:
2005 		 *   [1] category
2006 		 *   [1] action
2007 		 *   [2] capabilities
2008 		 *   [2] status code
2009 		 *   [2] association id (peer ID)
2010 		 *   [tlv] rates
2011 		 *   [tlv] xrates
2012 		 *   [tlv] mesh id
2013 		 *   [tlv] mesh conf
2014 		 *   [tlv] mesh peer link mgmt
2015 		 */
2016 		*frm++ = category;
2017 		*frm++ = action;
2018 		ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan));
2019 		ADDSHORT(frm, 0);		/* status code */
2020 		ADDSHORT(frm, args[1]);		/* AID */
2021 		rs = ieee80211_get_suprates(ic, ic->ic_curchan);
2022 		frm = ieee80211_add_rates(frm, rs);
2023 		frm = ieee80211_add_xrates(frm, rs);
2024 		frm = ieee80211_add_meshid(frm, vap);
2025 		frm = ieee80211_add_meshconf(frm, vap);
2026 		frm = ieee80211_add_meshpeer(frm,
2027 		    IEEE80211_MESH_PEER_LINK_CONFIRM,
2028 		    args[0], args[1], 0);
2029 		m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2030 		return mesh_send_action(ni, m);
2031 	} else {
2032 		vap->iv_stats.is_tx_nobuf++;
2033 		ieee80211_free_node(ni);
2034 		return ENOMEM;
2035 	}
2036 }
2037 
2038 static int
2039 mesh_send_action_meshpeering_close(struct ieee80211_node *ni,
2040 	int category, int action, void *args0)
2041 {
2042 	struct ieee80211vap *vap = ni->ni_vap;
2043 	struct ieee80211com *ic = ni->ni_ic;
2044 	uint16_t *args = args0;
2045 	struct mbuf *m;
2046 	uint8_t *frm;
2047 
2048 	IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2049 	    "send PEER CLOSE action: localid 0x%x, peerid 0x%x reason %d",
2050 	    args[0], args[1], args[2]);
2051 
2052 	IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2053 	    "ieee80211_ref_node (%s:%u) %p<%6D> refcnt %d\n", __func__, __LINE__,
2054 	    ni, ni->ni_macaddr, ieee80211_node_refcnt(ni)+1);
2055 	ieee80211_ref_node(ni);
2056 
2057 	m = ieee80211_getmgtframe(&frm,
2058 	    ic->ic_headroom + sizeof(struct ieee80211_frame),
2059 	    sizeof(uint16_t)	/* action+category */
2060 	    + sizeof(uint16_t)	/* reason code */
2061 	    + 2 + IEEE80211_MESHID_LEN
2062 	    + sizeof(struct ieee80211_meshpeer_ie)
2063 	);
2064 	if (m != NULL) {
2065 		/*
2066 		 * mesh peer close action frame format:
2067 		 *   [1] category
2068 		 *   [1] action
2069 		 *   [2] reason code
2070 		 *   [tlv] mesh id
2071 		 *   [tlv] mesh peer link mgmt
2072 		 */
2073 		*frm++ = category;
2074 		*frm++ = action;
2075 		ADDSHORT(frm, args[2]);		/* reason code */
2076 		frm = ieee80211_add_meshid(frm, vap);
2077 		frm = ieee80211_add_meshpeer(frm,
2078 		    IEEE80211_MESH_PEER_LINK_CLOSE,
2079 		    args[0], args[1], args[2]);
2080 		m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2081 		return mesh_send_action(ni, m);
2082 	} else {
2083 		vap->iv_stats.is_tx_nobuf++;
2084 		ieee80211_free_node(ni);
2085 		return ENOMEM;
2086 	}
2087 }
2088 
2089 static int
2090 mesh_send_action_meshlink_request(struct ieee80211_node *ni,
2091 	int category, int action, void *arg0)
2092 {
2093 	struct ieee80211vap *vap = ni->ni_vap;
2094 	struct ieee80211com *ic = ni->ni_ic;
2095 	struct mbuf *m;
2096 	uint8_t *frm;
2097 
2098 	IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2099 	    "%s", "send LINK METRIC REQUEST action");
2100 
2101 	IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2102 	    "ieee80211_ref_node (%s:%u) %p<%6D> refcnt %d\n", __func__, __LINE__,
2103 	    ni, ni->ni_macaddr, ":", ieee80211_node_refcnt(ni)+1);
2104 	ieee80211_ref_node(ni);
2105 
2106 	m = ieee80211_getmgtframe(&frm,
2107 	    ic->ic_headroom + sizeof(struct ieee80211_frame),
2108 	    sizeof(uint16_t)	/* action+category */
2109 	);
2110 	if (m != NULL) {
2111 		/*
2112 		 * mesh link metric request
2113 		 *   [1] category
2114 		 *   [1] action
2115 		 */
2116 		*frm++ = category;
2117 		*frm++ = action;
2118 		m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2119 		return mesh_send_action(ni, m);
2120 	} else {
2121 		vap->iv_stats.is_tx_nobuf++;
2122 		ieee80211_free_node(ni);
2123 		return ENOMEM;
2124 	}
2125 }
2126 
2127 static int
2128 mesh_send_action_meshlink_reply(struct ieee80211_node *ni,
2129 	int category, int action, void *args0)
2130 {
2131 	struct ieee80211vap *vap = ni->ni_vap;
2132 	struct ieee80211com *ic = ni->ni_ic;
2133 	uint32_t *metric = args0;
2134 	struct mbuf *m;
2135 	uint8_t *frm;
2136 
2137 	IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2138 	    "send LINK METRIC REPLY action: metric 0x%x", *metric);
2139 
2140 	IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2141 	    "ieee80211_ref_node (%s:%u) %p<%6D> refcnt %d\n", __func__, __LINE__,
2142 	    ni, ni->ni_macaddr, ":", ieee80211_node_refcnt(ni)+1);
2143 	ieee80211_ref_node(ni);
2144 
2145 	m = ieee80211_getmgtframe(&frm,
2146 	    ic->ic_headroom + sizeof(struct ieee80211_frame),
2147 	    sizeof(uint16_t)	/* action+category */
2148 	    + sizeof(struct ieee80211_meshlmetric_ie)
2149 	);
2150 	if (m != NULL) {
2151 		/*
2152 		 * mesh link metric reply
2153 		 *   [1] category
2154 		 *   [1] action
2155 		 *   [tlv] mesh link metric
2156 		 */
2157 		*frm++ = category;
2158 		*frm++ = action;
2159 		frm = ieee80211_add_meshlmetric(frm, *metric);
2160 		m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2161 		return mesh_send_action(ni, m);
2162 	} else {
2163 		vap->iv_stats.is_tx_nobuf++;
2164 		ieee80211_free_node(ni);
2165 		return ENOMEM;
2166 	}
2167 }
2168 
2169 static void
2170 mesh_peer_timeout_setup(struct ieee80211_node *ni)
2171 {
2172 	switch (ni->ni_mlstate) {
2173 	case IEEE80211_NODE_MESH_HOLDING:
2174 		ni->ni_mltval = ieee80211_mesh_holdingtimeout;
2175 		break;
2176 	case IEEE80211_NODE_MESH_CONFIRMRCV:
2177 		ni->ni_mltval = ieee80211_mesh_confirmtimeout;
2178 		break;
2179 	case IEEE80211_NODE_MESH_IDLE:
2180 		ni->ni_mltval = 0;
2181 		break;
2182 	default:
2183 		ni->ni_mltval = ieee80211_mesh_retrytimeout;
2184 		break;
2185 	}
2186 	if (ni->ni_mltval)
2187 		callout_reset(&ni->ni_mltimer, ni->ni_mltval,
2188 		    mesh_peer_timeout_cb, ni);
2189 }
2190 
2191 /*
2192  * Same as above but backoffs timer statisically 50%.
2193  */
2194 static void
2195 mesh_peer_timeout_backoff(struct ieee80211_node *ni)
2196 {
2197 	uint32_t r;
2198 
2199 	r = karc4random();
2200 	ni->ni_mltval += r % ni->ni_mltval;
2201 	callout_reset(&ni->ni_mltimer, ni->ni_mltval, mesh_peer_timeout_cb,
2202 	    ni);
2203 }
2204 
2205 static __inline void
2206 mesh_peer_timeout_stop(struct ieee80211_node *ni)
2207 {
2208 	callout_stop(&ni->ni_mltimer);
2209 }
2210 
2211 /*
2212  * Mesh Peer Link Management FSM timeout handling.
2213  */
2214 static void
2215 mesh_peer_timeout_cb(void *arg)
2216 {
2217 	struct ieee80211_node *ni = (struct ieee80211_node *)arg;
2218 	uint16_t args[3];
2219 
2220 	IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_MESH,
2221 	    ni, "mesh link timeout, state %d, retry counter %d",
2222 	    ni->ni_mlstate, ni->ni_mlrcnt);
2223 
2224 	switch (ni->ni_mlstate) {
2225 	case IEEE80211_NODE_MESH_IDLE:
2226 	case IEEE80211_NODE_MESH_ESTABLISHED:
2227 		break;
2228 	case IEEE80211_NODE_MESH_OPENSNT:
2229 	case IEEE80211_NODE_MESH_OPENRCV:
2230 		if (ni->ni_mlrcnt == ieee80211_mesh_maxretries) {
2231 			args[0] = ni->ni_mlpid;
2232 			args[2] = IEEE80211_REASON_MESH_MAX_RETRIES;
2233 			ieee80211_send_action(ni,
2234 			    IEEE80211_ACTION_CAT_MESHPEERING,
2235 			    IEEE80211_ACTION_MESHPEERING_CLOSE, args);
2236 			ni->ni_mlrcnt = 0;
2237 			mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2238 			mesh_peer_timeout_setup(ni);
2239 		} else {
2240 			args[0] = ni->ni_mlpid;
2241 			ieee80211_send_action(ni,
2242 			    IEEE80211_ACTION_CAT_MESHPEERING,
2243 			    IEEE80211_ACTION_MESHPEERING_OPEN, args);
2244 			ni->ni_mlrcnt++;
2245 			mesh_peer_timeout_backoff(ni);
2246 		}
2247 		break;
2248 	case IEEE80211_NODE_MESH_CONFIRMRCV:
2249 		if (ni->ni_mlrcnt == ieee80211_mesh_maxretries) {
2250 			args[0] = ni->ni_mlpid;
2251 			args[2] = IEEE80211_REASON_MESH_CONFIRM_TIMEOUT;
2252 			ieee80211_send_action(ni,
2253 			    IEEE80211_ACTION_CAT_MESHPEERING,
2254 			    IEEE80211_ACTION_MESHPEERING_CLOSE, args);
2255 			ni->ni_mlrcnt = 0;
2256 			mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2257 			mesh_peer_timeout_setup(ni);
2258 		} else {
2259 			ni->ni_mlrcnt++;
2260 			mesh_peer_timeout_setup(ni);
2261 		}
2262 		break;
2263 	case IEEE80211_NODE_MESH_HOLDING:
2264 		mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE);
2265 		break;
2266 	}
2267 }
2268 
2269 static int
2270 mesh_verify_meshid(struct ieee80211vap *vap, const uint8_t *ie)
2271 {
2272 	struct ieee80211_mesh_state *ms = vap->iv_mesh;
2273 
2274 	if (ie == NULL || ie[1] != ms->ms_idlen)
2275 		return 1;
2276 	return memcmp(ms->ms_id, ie + 2, ms->ms_idlen);
2277 }
2278 
2279 /*
2280  * Check if we are using the same algorithms for this mesh.
2281  */
2282 static int
2283 mesh_verify_meshconf(struct ieee80211vap *vap, const uint8_t *ie)
2284 {
2285 	const struct ieee80211_meshconf_ie *meshconf =
2286 	    (const struct ieee80211_meshconf_ie *) ie;
2287 	const struct ieee80211_mesh_state *ms = vap->iv_mesh;
2288 	uint16_t cap;
2289 
2290 	if (meshconf == NULL)
2291 		return 1;
2292 	if (meshconf->conf_pselid != ms->ms_ppath->mpp_ie) {
2293 		IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
2294 		    "unknown path selection algorithm: 0x%x\n",
2295 		    meshconf->conf_pselid);
2296 		return 1;
2297 	}
2298 	if (meshconf->conf_pmetid != ms->ms_pmetric->mpm_ie) {
2299 		IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
2300 		    "unknown path metric algorithm: 0x%x\n",
2301 		    meshconf->conf_pmetid);
2302 		return 1;
2303 	}
2304 	if (meshconf->conf_ccid != 0) {
2305 		IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
2306 		    "unknown congestion control algorithm: 0x%x\n",
2307 		    meshconf->conf_ccid);
2308 		return 1;
2309 	}
2310 	if (meshconf->conf_syncid != IEEE80211_MESHCONF_SYNC_NEIGHOFF) {
2311 		IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
2312 		    "unknown sync algorithm: 0x%x\n",
2313 		    meshconf->conf_syncid);
2314 		return 1;
2315 	}
2316 	if (meshconf->conf_authid != 0) {
2317 		IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
2318 		    "unknown auth auth algorithm: 0x%x\n",
2319 		    meshconf->conf_pselid);
2320 		return 1;
2321 	}
2322 	/* NB: conf_cap is only read correctly here */
2323 	cap = LE_READ_2(&meshconf->conf_cap);
2324 	/* Not accepting peers */
2325 	if (!(cap & IEEE80211_MESHCONF_CAP_AP)) {
2326 		IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
2327 		    "not accepting peers: 0x%x\n", meshconf->conf_cap);
2328 		return 1;
2329 	}
2330 	return 0;
2331 }
2332 
2333 static int
2334 mesh_verify_meshpeer(struct ieee80211vap *vap, uint8_t subtype,
2335     const uint8_t *ie)
2336 {
2337 	const struct ieee80211_meshpeer_ie *meshpeer =
2338 	    (const struct ieee80211_meshpeer_ie *) ie;
2339 
2340 	if (meshpeer == NULL || meshpeer->peer_len < 6 ||
2341 	    meshpeer->peer_len > 10)
2342 		return 1;
2343 	switch (subtype) {
2344 	case IEEE80211_MESH_PEER_LINK_OPEN:
2345 		if (meshpeer->peer_len != 6)
2346 			return 1;
2347 		break;
2348 	case IEEE80211_MESH_PEER_LINK_CONFIRM:
2349 		if (meshpeer->peer_len != 8)
2350 			return 1;
2351 		break;
2352 	case IEEE80211_MESH_PEER_LINK_CLOSE:
2353 		if (meshpeer->peer_len < 8)
2354 			return 1;
2355 		if (meshpeer->peer_len == 8 && meshpeer->peer_linkid != 0)
2356 			return 1;
2357 		if (meshpeer->peer_rcode == 0)
2358 			return 1;
2359 		break;
2360 	}
2361 	return 0;
2362 }
2363 
2364 /*
2365  * Add a Mesh ID IE to a frame.
2366  */
2367 uint8_t *
2368 ieee80211_add_meshid(uint8_t *frm, struct ieee80211vap *vap)
2369 {
2370 	struct ieee80211_mesh_state *ms = vap->iv_mesh;
2371 
2372 	KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a mbss vap"));
2373 
2374 	*frm++ = IEEE80211_ELEMID_MESHID;
2375 	*frm++ = ms->ms_idlen;
2376 	memcpy(frm, ms->ms_id, ms->ms_idlen);
2377 	return frm + ms->ms_idlen;
2378 }
2379 
2380 /*
2381  * Add a Mesh Configuration IE to a frame.
2382  * For now just use HWMP routing, Airtime link metric, Null Congestion
2383  * Signaling, Null Sync Protocol and Null Authentication.
2384  */
2385 uint8_t *
2386 ieee80211_add_meshconf(uint8_t *frm, struct ieee80211vap *vap)
2387 {
2388 	const struct ieee80211_mesh_state *ms = vap->iv_mesh;
2389 	uint16_t caps;
2390 
2391 	KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap"));
2392 
2393 	*frm++ = IEEE80211_ELEMID_MESHCONF;
2394 	*frm++ = sizeof(struct ieee80211_meshconf_ie) - 2;
2395 	*frm++ = ms->ms_ppath->mpp_ie;		/* path selection */
2396 	*frm++ = ms->ms_pmetric->mpm_ie;	/* link metric */
2397 	*frm++ = IEEE80211_MESHCONF_CC_DISABLED;
2398 	*frm++ = IEEE80211_MESHCONF_SYNC_NEIGHOFF;
2399 	*frm++ = IEEE80211_MESHCONF_AUTH_DISABLED;
2400 	/* NB: set the number of neighbors before the rest */
2401 	*frm = (ms->ms_neighbors > 15 ? 15 : ms->ms_neighbors) << 1;
2402 	if (ms->ms_flags & IEEE80211_MESHFLAGS_PORTAL)
2403 		*frm |= IEEE80211_MESHCONF_FORM_MP;
2404 	frm += 1;
2405 	caps = 0;
2406 	if (ms->ms_flags & IEEE80211_MESHFLAGS_AP)
2407 		caps |= IEEE80211_MESHCONF_CAP_AP;
2408 	if (ms->ms_flags & IEEE80211_MESHFLAGS_FWD)
2409 		caps |= IEEE80211_MESHCONF_CAP_FWRD;
2410 	ADDSHORT(frm, caps);
2411 	return frm;
2412 }
2413 
2414 /*
2415  * Add a Mesh Peer Management IE to a frame.
2416  */
2417 uint8_t *
2418 ieee80211_add_meshpeer(uint8_t *frm, uint8_t subtype, uint16_t localid,
2419     uint16_t peerid, uint16_t reason)
2420 {
2421 	/* XXX change for AH */
2422 	static const uint8_t meshpeerproto[4] = IEEE80211_MESH_PEER_PROTO;
2423 
2424 	KASSERT(localid != 0, ("localid == 0"));
2425 
2426 	*frm++ = IEEE80211_ELEMID_MESHPEER;
2427 	switch (subtype) {
2428 	case IEEE80211_MESH_PEER_LINK_OPEN:
2429 		*frm++ = 6;		/* length */
2430 		memcpy(frm, meshpeerproto, 4);
2431 		frm += 4;
2432 		ADDSHORT(frm, localid);	/* local ID */
2433 		break;
2434 	case IEEE80211_MESH_PEER_LINK_CONFIRM:
2435 		KASSERT(peerid != 0, ("sending peer confirm without peer id"));
2436 		*frm++ = 8;		/* length */
2437 		memcpy(frm, meshpeerproto, 4);
2438 		frm += 4;
2439 		ADDSHORT(frm, localid);	/* local ID */
2440 		ADDSHORT(frm, peerid);	/* peer ID */
2441 		break;
2442 	case IEEE80211_MESH_PEER_LINK_CLOSE:
2443 		if (peerid)
2444 			*frm++ = 10;	/* length */
2445 		else
2446 			*frm++ = 8;	/* length */
2447 		memcpy(frm, meshpeerproto, 4);
2448 		frm += 4;
2449 		ADDSHORT(frm, localid);	/* local ID */
2450 		if (peerid)
2451 			ADDSHORT(frm, peerid);	/* peer ID */
2452 		ADDSHORT(frm, reason);
2453 		break;
2454 	}
2455 	return frm;
2456 }
2457 
2458 /*
2459  * Compute an Airtime Link Metric for the link with this node.
2460  *
2461  * Based on Draft 3.0 spec (11B.10, p.149).
2462  */
2463 /*
2464  * Max 802.11s overhead.
2465  */
2466 #define IEEE80211_MESH_MAXOVERHEAD \
2467 	(sizeof(struct ieee80211_qosframe_addr4) \
2468 	 + sizeof(struct ieee80211_meshcntl_ae11) \
2469 	+ sizeof(struct llc) \
2470 	+ IEEE80211_ADDR_LEN \
2471 	+ IEEE80211_WEP_IVLEN \
2472 	+ IEEE80211_WEP_KIDLEN \
2473 	+ IEEE80211_WEP_CRCLEN \
2474 	+ IEEE80211_WEP_MICLEN \
2475 	+ IEEE80211_CRC_LEN)
2476 uint32_t
2477 mesh_airtime_calc(struct ieee80211_node *ni)
2478 {
2479 #define M_BITS 8
2480 #define S_FACTOR (2 * M_BITS)
2481 	struct ieee80211com *ic = ni->ni_ic;
2482 	struct ifnet *ifp = ni->ni_vap->iv_ifp;
2483 	const static int nbits = 8192 << M_BITS;
2484 	uint32_t overhead, rate, errrate;
2485 	uint64_t res;
2486 
2487 	/* Time to transmit a frame */
2488 	rate = ni->ni_txrate;
2489 	overhead = ieee80211_compute_duration(ic->ic_rt,
2490 	    ifp->if_mtu + IEEE80211_MESH_MAXOVERHEAD, rate, 0) << M_BITS;
2491 	/* Error rate in percentage */
2492 	/* XXX assuming small failures are ok */
2493 	errrate = (((ifp->if_oerrors +
2494 	    ifp->if_ierrors) / 100) << M_BITS) / 100;
2495 	res = (overhead + (nbits / rate)) *
2496 	    ((1 << S_FACTOR) / ((1 << M_BITS) - errrate));
2497 
2498 	return (uint32_t)(res >> S_FACTOR);
2499 #undef M_BITS
2500 #undef S_FACTOR
2501 }
2502 
2503 /*
2504  * Add a Mesh Link Metric report IE to a frame.
2505  */
2506 uint8_t *
2507 ieee80211_add_meshlmetric(uint8_t *frm, uint32_t metric)
2508 {
2509 	*frm++ = IEEE80211_ELEMID_MESHLINK;
2510 	*frm++ = 4;
2511 	ADDWORD(frm, metric);
2512 	return frm;
2513 }
2514 #undef ADDSHORT
2515 #undef ADDWORD
2516 
2517 /*
2518  * Initialize any mesh-specific node state.
2519  */
2520 void
2521 ieee80211_mesh_node_init(struct ieee80211vap *vap, struct ieee80211_node *ni)
2522 {
2523 	ni->ni_flags |= IEEE80211_NODE_QOS;
2524 	callout_init_mp(&ni->ni_mltimer);
2525 }
2526 
2527 /*
2528  * Cleanup any mesh-specific node state.
2529  */
2530 void
2531 ieee80211_mesh_node_cleanup(struct ieee80211_node *ni)
2532 {
2533 	struct ieee80211vap *vap = ni->ni_vap;
2534 	struct ieee80211_mesh_state *ms = vap->iv_mesh;
2535 
2536 	callout_stop(&ni->ni_mltimer);
2537 	/* NB: short-circuit callbacks after mesh_vdetach */
2538 	if (vap->iv_mesh != NULL)
2539 		ms->ms_ppath->mpp_peerdown(ni);
2540 }
2541 
2542 void
2543 ieee80211_parse_meshid(struct ieee80211_node *ni, const uint8_t *ie)
2544 {
2545 	ni->ni_meshidlen = ie[1];
2546 	memcpy(ni->ni_meshid, ie + 2, ie[1]);
2547 }
2548 
2549 /*
2550  * Setup mesh-specific node state on neighbor discovery.
2551  */
2552 void
2553 ieee80211_mesh_init_neighbor(struct ieee80211_node *ni,
2554 	const struct ieee80211_frame *wh,
2555 	const struct ieee80211_scanparams *sp)
2556 {
2557 	ieee80211_parse_meshid(ni, sp->meshid);
2558 }
2559 
2560 void
2561 ieee80211_mesh_update_beacon(struct ieee80211vap *vap,
2562 	struct ieee80211_beacon_offsets *bo)
2563 {
2564 	KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap"));
2565 
2566 	if (isset(bo->bo_flags, IEEE80211_BEACON_MESHCONF)) {
2567 		(void)ieee80211_add_meshconf(bo->bo_meshconf, vap);
2568 		clrbit(bo->bo_flags, IEEE80211_BEACON_MESHCONF);
2569 	}
2570 }
2571 
2572 static int
2573 mesh_ioctl_get80211(struct ieee80211vap *vap, struct ieee80211req *ireq)
2574 {
2575 	struct ieee80211_mesh_state *ms = vap->iv_mesh;
2576 	uint8_t tmpmeshid[IEEE80211_NWID_LEN];
2577 	struct ieee80211_mesh_route *rt;
2578 	struct ieee80211req_mesh_route *imr;
2579 	size_t len, off;
2580 	uint8_t *p;
2581 	int error;
2582 
2583 	if (vap->iv_opmode != IEEE80211_M_MBSS)
2584 		return ENOSYS;
2585 
2586 	error = 0;
2587 	switch (ireq->i_type) {
2588 	case IEEE80211_IOC_MESH_ID:
2589 		ireq->i_len = ms->ms_idlen;
2590 		memcpy(tmpmeshid, ms->ms_id, ireq->i_len);
2591 		error = copyout(tmpmeshid, ireq->i_data, ireq->i_len);
2592 		break;
2593 	case IEEE80211_IOC_MESH_AP:
2594 		ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_AP) != 0;
2595 		break;
2596 	case IEEE80211_IOC_MESH_FWRD:
2597 		ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) != 0;
2598 		break;
2599 	case IEEE80211_IOC_MESH_TTL:
2600 		ireq->i_val = ms->ms_ttl;
2601 		break;
2602 	case IEEE80211_IOC_MESH_RTCMD:
2603 		switch (ireq->i_val) {
2604 		case IEEE80211_MESH_RTCMD_LIST:
2605 			len = 0;
2606 			MESH_RT_LOCK(ms);
2607 			TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) {
2608 				len += sizeof(*imr);
2609 			}
2610 			MESH_RT_UNLOCK(ms);
2611 			if (len > ireq->i_len || ireq->i_len < sizeof(*imr)) {
2612 				ireq->i_len = len;
2613 				return ENOMEM;
2614 			}
2615 			ireq->i_len = len;
2616 			/* XXX M_WAIT? */
2617 			p = kmalloc(len, M_TEMP, M_INTWAIT | M_ZERO);
2618 			if (p == NULL)
2619 				return ENOMEM;
2620 			off = 0;
2621 			MESH_RT_LOCK(ms);
2622 			TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) {
2623 				if (off >= len)
2624 					break;
2625 				imr = (struct ieee80211req_mesh_route *)
2626 				    (p + off);
2627 				imr->imr_flags = rt->rt_flags;
2628 				IEEE80211_ADDR_COPY(imr->imr_dest,
2629 				    rt->rt_dest);
2630 				IEEE80211_ADDR_COPY(imr->imr_nexthop,
2631 				    rt->rt_nexthop);
2632 				imr->imr_metric = rt->rt_metric;
2633 				imr->imr_nhops = rt->rt_nhops;
2634 				imr->imr_lifetime = rt->rt_lifetime;
2635 				imr->imr_lastmseq = rt->rt_lastmseq;
2636 				off += sizeof(*imr);
2637 			}
2638 			MESH_RT_UNLOCK(ms);
2639 			error = copyout(p, (uint8_t *)ireq->i_data,
2640 			    ireq->i_len);
2641 			kfree(p, M_TEMP);
2642 			break;
2643 		case IEEE80211_MESH_RTCMD_FLUSH:
2644 		case IEEE80211_MESH_RTCMD_ADD:
2645 		case IEEE80211_MESH_RTCMD_DELETE:
2646 			return EINVAL;
2647 		default:
2648 			return ENOSYS;
2649 		}
2650 		break;
2651 	case IEEE80211_IOC_MESH_PR_METRIC:
2652 		len = strlen(ms->ms_pmetric->mpm_descr);
2653 		if (ireq->i_len < len)
2654 			return EINVAL;
2655 		ireq->i_len = len;
2656 		error = copyout(ms->ms_pmetric->mpm_descr,
2657 		    (uint8_t *)ireq->i_data, len);
2658 		break;
2659 	case IEEE80211_IOC_MESH_PR_PATH:
2660 		len = strlen(ms->ms_ppath->mpp_descr);
2661 		if (ireq->i_len < len)
2662 			return EINVAL;
2663 		ireq->i_len = len;
2664 		error = copyout(ms->ms_ppath->mpp_descr,
2665 		    (uint8_t *)ireq->i_data, len);
2666 		break;
2667 	default:
2668 		return ENOSYS;
2669 	}
2670 
2671 	return error;
2672 }
2673 IEEE80211_IOCTL_GET(mesh, mesh_ioctl_get80211);
2674 
2675 static int
2676 mesh_ioctl_set80211(struct ieee80211vap *vap, struct ieee80211req *ireq)
2677 {
2678 	struct ieee80211_mesh_state *ms = vap->iv_mesh;
2679 	uint8_t tmpmeshid[IEEE80211_NWID_LEN];
2680 	uint8_t tmpaddr[IEEE80211_ADDR_LEN];
2681 	char tmpproto[IEEE80211_MESH_PROTO_DSZ];
2682 	int error;
2683 
2684 	if (vap->iv_opmode != IEEE80211_M_MBSS)
2685 		return ENOSYS;
2686 
2687 	error = 0;
2688 	switch (ireq->i_type) {
2689 	case IEEE80211_IOC_MESH_ID:
2690 		if (ireq->i_val != 0 || ireq->i_len > IEEE80211_MESHID_LEN)
2691 			return EINVAL;
2692 		error = copyin(ireq->i_data, tmpmeshid, ireq->i_len);
2693 		if (error != 0)
2694 			break;
2695 		memset(ms->ms_id, 0, IEEE80211_NWID_LEN);
2696 		ms->ms_idlen = ireq->i_len;
2697 		memcpy(ms->ms_id, tmpmeshid, ireq->i_len);
2698 		error = ENETRESET;
2699 		break;
2700 	case IEEE80211_IOC_MESH_AP:
2701 		if (ireq->i_val)
2702 			ms->ms_flags |= IEEE80211_MESHFLAGS_AP;
2703 		else
2704 			ms->ms_flags &= ~IEEE80211_MESHFLAGS_AP;
2705 		error = ENETRESET;
2706 		break;
2707 	case IEEE80211_IOC_MESH_FWRD:
2708 		if (ireq->i_val)
2709 			ms->ms_flags |= IEEE80211_MESHFLAGS_FWD;
2710 		else
2711 			ms->ms_flags &= ~IEEE80211_MESHFLAGS_FWD;
2712 		break;
2713 	case IEEE80211_IOC_MESH_TTL:
2714 		ms->ms_ttl = (uint8_t) ireq->i_val;
2715 		break;
2716 	case IEEE80211_IOC_MESH_RTCMD:
2717 		switch (ireq->i_val) {
2718 		case IEEE80211_MESH_RTCMD_LIST:
2719 			return EINVAL;
2720 		case IEEE80211_MESH_RTCMD_FLUSH:
2721 			ieee80211_mesh_rt_flush(vap);
2722 			break;
2723 		case IEEE80211_MESH_RTCMD_ADD:
2724 			if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ireq->i_data) ||
2725 			    IEEE80211_ADDR_EQ(broadcastaddr, ireq->i_data))
2726 				return EINVAL;
2727 			error = copyin(ireq->i_data, &tmpaddr,
2728 			    IEEE80211_ADDR_LEN);
2729 			if (error == 0)
2730 				ieee80211_mesh_discover(vap, tmpaddr, NULL);
2731 			break;
2732 		case IEEE80211_MESH_RTCMD_DELETE:
2733 			ieee80211_mesh_rt_del(vap, ireq->i_data);
2734 			break;
2735 		default:
2736 			return ENOSYS;
2737 		}
2738 		break;
2739 	case IEEE80211_IOC_MESH_PR_METRIC:
2740 		error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto));
2741 		if (error == 0) {
2742 			error = mesh_select_proto_metric(vap, tmpproto);
2743 			if (error == 0)
2744 				error = ENETRESET;
2745 		}
2746 		break;
2747 	case IEEE80211_IOC_MESH_PR_PATH:
2748 		error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto));
2749 		if (error == 0) {
2750 			error = mesh_select_proto_path(vap, tmpproto);
2751 			if (error == 0)
2752 				error = ENETRESET;
2753 		}
2754 		break;
2755 	default:
2756 		return ENOSYS;
2757 	}
2758 	return error;
2759 }
2760 IEEE80211_IOCTL_SET(mesh, mesh_ioctl_set80211);
2761