1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2009 The FreeBSD Foundation
5 *
6 * This software was developed by Rui Paulo under sponsorship from the
7 * FreeBSD Foundation.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 */
30 #include <sys/cdefs.h>
31 #ifdef __FreeBSD__
32 #endif
33
34 /*
35 * IEEE 802.11s Mesh Point (MBSS) support.
36 *
37 * Based on March 2009, D3.0 802.11s draft spec.
38 */
39 #include "opt_inet.h"
40 #include "opt_wlan.h"
41
42 #include <sys/param.h>
43 #include <sys/systm.h>
44 #include <sys/mbuf.h>
45 #include <sys/malloc.h>
46 #include <sys/kernel.h>
47
48 #include <sys/socket.h>
49 #include <sys/sockio.h>
50 #include <sys/endian.h>
51 #include <sys/errno.h>
52 #include <sys/proc.h>
53 #include <sys/sysctl.h>
54
55 #include <net/bpf.h>
56 #include <net/if.h>
57 #include <net/if_var.h>
58 #include <net/if_media.h>
59 #include <net/if_llc.h>
60 #include <net/ethernet.h>
61
62 #include <net80211/ieee80211_var.h>
63 #include <net80211/ieee80211_action.h>
64 #ifdef IEEE80211_SUPPORT_SUPERG
65 #include <net80211/ieee80211_superg.h>
66 #endif
67 #include <net80211/ieee80211_input.h>
68 #include <net80211/ieee80211_mesh.h>
69
70 static void mesh_rt_flush_invalid(struct ieee80211vap *);
71 static int mesh_select_proto_path(struct ieee80211vap *, const char *);
72 static int mesh_select_proto_metric(struct ieee80211vap *, const char *);
73 static void mesh_vattach(struct ieee80211vap *);
74 static int mesh_newstate(struct ieee80211vap *, enum ieee80211_state, int);
75 static void mesh_rt_cleanup_cb(void *);
76 static void mesh_gatemode_setup(struct ieee80211vap *);
77 static void mesh_gatemode_cb(void *);
78 static void mesh_linkchange(struct ieee80211_node *,
79 enum ieee80211_mesh_mlstate);
80 static void mesh_checkid(void *, struct ieee80211_node *);
81 static uint32_t mesh_generateid(struct ieee80211vap *);
82 static int mesh_checkpseq(struct ieee80211vap *,
83 const uint8_t [IEEE80211_ADDR_LEN], uint32_t);
84 static void mesh_transmit_to_gate(struct ieee80211vap *, struct mbuf *,
85 struct ieee80211_mesh_route *);
86 static void mesh_forward(struct ieee80211vap *, struct mbuf *,
87 const struct ieee80211_meshcntl *);
88 static int mesh_input(struct ieee80211_node *, struct mbuf *,
89 const struct ieee80211_rx_stats *rxs, int, int);
90 static void mesh_recv_mgmt(struct ieee80211_node *, struct mbuf *, int,
91 const struct ieee80211_rx_stats *rxs, int, int);
92 static void mesh_recv_ctl(struct ieee80211_node *, struct mbuf *, int);
93 static void mesh_peer_timeout_setup(struct ieee80211_node *);
94 static void mesh_peer_timeout_backoff(struct ieee80211_node *);
95 static void mesh_peer_timeout_cb(void *);
96 static __inline void
97 mesh_peer_timeout_stop(struct ieee80211_node *);
98 static int mesh_verify_meshid(struct ieee80211vap *, const uint8_t *);
99 static int mesh_verify_meshconf(struct ieee80211vap *, const uint8_t *);
100 static int mesh_verify_meshpeer(struct ieee80211vap *, uint8_t,
101 const uint8_t *);
102 uint32_t mesh_airtime_calc(struct ieee80211_node *);
103
104 /*
105 * Timeout values come from the specification and are in milliseconds.
106 */
107 static SYSCTL_NODE(_net_wlan, OID_AUTO, mesh, CTLFLAG_RD | CTLFLAG_MPSAFE, 0,
108 "IEEE 802.11s parameters");
109 static int ieee80211_mesh_gateint = -1;
110 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, gateint,
111 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
112 &ieee80211_mesh_gateint, 0, ieee80211_sysctl_msecs_ticks, "I",
113 "mesh gate interval (ms)");
114 static int ieee80211_mesh_retrytimeout = -1;
115 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, retrytimeout,
116 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
117 &ieee80211_mesh_retrytimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
118 "Retry timeout (msec)");
119 static int ieee80211_mesh_holdingtimeout = -1;
120
121 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, holdingtimeout,
122 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
123 &ieee80211_mesh_holdingtimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
124 "Holding state timeout (msec)");
125 static int ieee80211_mesh_confirmtimeout = -1;
126 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, confirmtimeout,
127 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
128 &ieee80211_mesh_confirmtimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
129 "Confirm state timeout (msec)");
130 static int ieee80211_mesh_backofftimeout = -1;
131 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, backofftimeout,
132 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
133 &ieee80211_mesh_backofftimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
134 "Backoff timeout (msec). This is to throutles peering forever when "
135 "not receiving answer or is rejected by a neighbor");
136 static int ieee80211_mesh_maxretries = 2;
137 SYSCTL_INT(_net_wlan_mesh, OID_AUTO, maxretries, CTLFLAG_RW,
138 &ieee80211_mesh_maxretries, 0,
139 "Maximum retries during peer link establishment");
140 static int ieee80211_mesh_maxholding = 2;
141 SYSCTL_INT(_net_wlan_mesh, OID_AUTO, maxholding, CTLFLAG_RW,
142 &ieee80211_mesh_maxholding, 0,
143 "Maximum times we are allowed to transition to HOLDING state before "
144 "backinoff during peer link establishment");
145
146 static const uint8_t broadcastaddr[IEEE80211_ADDR_LEN] =
147 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
148
149 static ieee80211_recv_action_func mesh_recv_action_meshpeering_open;
150 static ieee80211_recv_action_func mesh_recv_action_meshpeering_confirm;
151 static ieee80211_recv_action_func mesh_recv_action_meshpeering_close;
152 static ieee80211_recv_action_func mesh_recv_action_meshlmetric;
153 static ieee80211_recv_action_func mesh_recv_action_meshgate;
154
155 static ieee80211_send_action_func mesh_send_action_meshpeering_open;
156 static ieee80211_send_action_func mesh_send_action_meshpeering_confirm;
157 static ieee80211_send_action_func mesh_send_action_meshpeering_close;
158 static ieee80211_send_action_func mesh_send_action_meshlmetric;
159 static ieee80211_send_action_func mesh_send_action_meshgate;
160
161 static const struct ieee80211_mesh_proto_metric mesh_metric_airtime = {
162 .mpm_descr = "AIRTIME",
163 .mpm_ie = IEEE80211_MESHCONF_METRIC_AIRTIME,
164 .mpm_metric = mesh_airtime_calc,
165 };
166
167 static struct ieee80211_mesh_proto_path mesh_proto_paths[4];
168 static struct ieee80211_mesh_proto_metric mesh_proto_metrics[4];
169
170 MALLOC_DEFINE(M_80211_MESH_PREQ, "80211preq", "802.11 MESH Path Request frame");
171 MALLOC_DEFINE(M_80211_MESH_PREP, "80211prep", "802.11 MESH Path Reply frame");
172 MALLOC_DEFINE(M_80211_MESH_PERR, "80211perr", "802.11 MESH Path Error frame");
173
174 /* The longer one of the lifetime should be stored as new lifetime */
175 #define MESH_ROUTE_LIFETIME_MAX(a, b) (a > b ? a : b)
176
177 MALLOC_DEFINE(M_80211_MESH_RT, "80211mesh_rt", "802.11s routing table");
178 MALLOC_DEFINE(M_80211_MESH_GT_RT, "80211mesh_gt", "802.11s known gates table");
179
180 /*
181 * Helper functions to manipulate the Mesh routing table.
182 */
183
184 static struct ieee80211_mesh_route *
mesh_rt_find_locked(struct ieee80211_mesh_state * ms,const uint8_t dest[IEEE80211_ADDR_LEN])185 mesh_rt_find_locked(struct ieee80211_mesh_state *ms,
186 const uint8_t dest[IEEE80211_ADDR_LEN])
187 {
188 struct ieee80211_mesh_route *rt;
189
190 MESH_RT_LOCK_ASSERT(ms);
191
192 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) {
193 if (IEEE80211_ADDR_EQ(dest, rt->rt_dest))
194 return rt;
195 }
196 return NULL;
197 }
198
199 static struct ieee80211_mesh_route *
mesh_rt_add_locked(struct ieee80211vap * vap,const uint8_t dest[IEEE80211_ADDR_LEN])200 mesh_rt_add_locked(struct ieee80211vap *vap,
201 const uint8_t dest[IEEE80211_ADDR_LEN])
202 {
203 struct ieee80211_mesh_state *ms = vap->iv_mesh;
204 struct ieee80211_mesh_route *rt;
205
206 KASSERT(!IEEE80211_ADDR_EQ(broadcastaddr, dest),
207 ("%s: adding broadcast to the routing table", __func__));
208
209 MESH_RT_LOCK_ASSERT(ms);
210
211 rt = IEEE80211_MALLOC(ALIGN(sizeof(struct ieee80211_mesh_route)) +
212 ms->ms_ppath->mpp_privlen, M_80211_MESH_RT,
213 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
214 if (rt != NULL) {
215 rt->rt_vap = vap;
216 IEEE80211_ADDR_COPY(rt->rt_dest, dest);
217 rt->rt_priv = (void *)ALIGN(&rt[1]);
218 MESH_RT_ENTRY_LOCK_INIT(rt, "MBSS_RT");
219 callout_init(&rt->rt_discovery, 1);
220 rt->rt_updtime = ticks; /* create time */
221 TAILQ_INSERT_TAIL(&ms->ms_routes, rt, rt_next);
222 }
223 return rt;
224 }
225
226 struct ieee80211_mesh_route *
ieee80211_mesh_rt_find(struct ieee80211vap * vap,const uint8_t dest[IEEE80211_ADDR_LEN])227 ieee80211_mesh_rt_find(struct ieee80211vap *vap,
228 const uint8_t dest[IEEE80211_ADDR_LEN])
229 {
230 struct ieee80211_mesh_state *ms = vap->iv_mesh;
231 struct ieee80211_mesh_route *rt;
232
233 MESH_RT_LOCK(ms);
234 rt = mesh_rt_find_locked(ms, dest);
235 MESH_RT_UNLOCK(ms);
236 return rt;
237 }
238
239 struct ieee80211_mesh_route *
ieee80211_mesh_rt_add(struct ieee80211vap * vap,const uint8_t dest[IEEE80211_ADDR_LEN])240 ieee80211_mesh_rt_add(struct ieee80211vap *vap,
241 const uint8_t dest[IEEE80211_ADDR_LEN])
242 {
243 struct ieee80211_mesh_state *ms = vap->iv_mesh;
244 struct ieee80211_mesh_route *rt;
245
246 KASSERT(ieee80211_mesh_rt_find(vap, dest) == NULL,
247 ("%s: duplicate entry in the routing table", __func__));
248 KASSERT(!IEEE80211_ADDR_EQ(vap->iv_myaddr, dest),
249 ("%s: adding self to the routing table", __func__));
250
251 MESH_RT_LOCK(ms);
252 rt = mesh_rt_add_locked(vap, dest);
253 MESH_RT_UNLOCK(ms);
254 return rt;
255 }
256
257 /*
258 * Update the route lifetime and returns the updated lifetime.
259 * If new_lifetime is zero and route is timedout it will be invalidated.
260 * new_lifetime is in msec
261 */
262 int
ieee80211_mesh_rt_update(struct ieee80211_mesh_route * rt,int new_lifetime)263 ieee80211_mesh_rt_update(struct ieee80211_mesh_route *rt, int new_lifetime)
264 {
265 int timesince, now;
266 uint32_t lifetime = 0;
267
268 KASSERT(rt != NULL, ("route is NULL"));
269
270 now = ticks;
271 MESH_RT_ENTRY_LOCK(rt);
272
273 /* dont clobber a proxy entry gated by us */
274 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY && rt->rt_nhops == 0) {
275 MESH_RT_ENTRY_UNLOCK(rt);
276 return rt->rt_lifetime;
277 }
278
279 timesince = ticks_to_msecs(now - rt->rt_updtime);
280 rt->rt_updtime = now;
281 if (timesince >= rt->rt_lifetime) {
282 if (new_lifetime != 0) {
283 rt->rt_lifetime = new_lifetime;
284 }
285 else {
286 rt->rt_flags &= ~IEEE80211_MESHRT_FLAGS_VALID;
287 rt->rt_lifetime = 0;
288 }
289 } else {
290 /* update what is left of lifetime */
291 rt->rt_lifetime = rt->rt_lifetime - timesince;
292 rt->rt_lifetime = MESH_ROUTE_LIFETIME_MAX(
293 new_lifetime, rt->rt_lifetime);
294 }
295 lifetime = rt->rt_lifetime;
296 MESH_RT_ENTRY_UNLOCK(rt);
297
298 return lifetime;
299 }
300
301 /*
302 * Add a proxy route (as needed) for the specified destination.
303 */
304 void
ieee80211_mesh_proxy_check(struct ieee80211vap * vap,const uint8_t dest[IEEE80211_ADDR_LEN])305 ieee80211_mesh_proxy_check(struct ieee80211vap *vap,
306 const uint8_t dest[IEEE80211_ADDR_LEN])
307 {
308 struct ieee80211_mesh_state *ms = vap->iv_mesh;
309 struct ieee80211_mesh_route *rt;
310
311 MESH_RT_LOCK(ms);
312 rt = mesh_rt_find_locked(ms, dest);
313 if (rt == NULL) {
314 rt = mesh_rt_add_locked(vap, dest);
315 if (rt == NULL) {
316 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
317 "%s", "unable to add proxy entry");
318 vap->iv_stats.is_mesh_rtaddfailed++;
319 } else {
320 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
321 "%s", "add proxy entry");
322 IEEE80211_ADDR_COPY(rt->rt_mesh_gate, vap->iv_myaddr);
323 IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr);
324 rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID
325 | IEEE80211_MESHRT_FLAGS_PROXY;
326 }
327 } else if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) {
328 KASSERT(rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY,
329 ("no proxy flag for poxy entry"));
330 struct ieee80211com *ic = vap->iv_ic;
331 /*
332 * Fix existing entry created by received frames from
333 * stations that have some memory of dest. We also
334 * flush any frames held on the staging queue; delivering
335 * them is too much trouble right now.
336 */
337 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
338 "%s", "fix proxy entry");
339 IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr);
340 rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID
341 | IEEE80211_MESHRT_FLAGS_PROXY;
342 /* XXX belongs in hwmp */
343 ieee80211_ageq_drain_node(&ic->ic_stageq,
344 (void *)(uintptr_t) ieee80211_mac_hash(ic, dest));
345 /* XXX stat? */
346 }
347 MESH_RT_UNLOCK(ms);
348 }
349
350 static __inline void
mesh_rt_del(struct ieee80211_mesh_state * ms,struct ieee80211_mesh_route * rt)351 mesh_rt_del(struct ieee80211_mesh_state *ms, struct ieee80211_mesh_route *rt)
352 {
353 TAILQ_REMOVE(&ms->ms_routes, rt, rt_next);
354 /*
355 * Grab the lock before destroying it, to be sure no one else
356 * is holding the route.
357 */
358 MESH_RT_ENTRY_LOCK(rt);
359 callout_drain(&rt->rt_discovery);
360 MESH_RT_ENTRY_LOCK_DESTROY(rt);
361 IEEE80211_FREE(rt, M_80211_MESH_RT);
362 }
363
364 void
ieee80211_mesh_rt_del(struct ieee80211vap * vap,const uint8_t dest[IEEE80211_ADDR_LEN])365 ieee80211_mesh_rt_del(struct ieee80211vap *vap,
366 const uint8_t dest[IEEE80211_ADDR_LEN])
367 {
368 struct ieee80211_mesh_state *ms = vap->iv_mesh;
369 struct ieee80211_mesh_route *rt, *next;
370
371 MESH_RT_LOCK(ms);
372 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) {
373 if (IEEE80211_ADDR_EQ(rt->rt_dest, dest)) {
374 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) {
375 ms->ms_ppath->mpp_senderror(vap, dest, rt,
376 IEEE80211_REASON_MESH_PERR_NO_PROXY);
377 } else {
378 ms->ms_ppath->mpp_senderror(vap, dest, rt,
379 IEEE80211_REASON_MESH_PERR_DEST_UNREACH);
380 }
381 mesh_rt_del(ms, rt);
382 MESH_RT_UNLOCK(ms);
383 return;
384 }
385 }
386 MESH_RT_UNLOCK(ms);
387 }
388
389 void
ieee80211_mesh_rt_flush(struct ieee80211vap * vap)390 ieee80211_mesh_rt_flush(struct ieee80211vap *vap)
391 {
392 struct ieee80211_mesh_state *ms = vap->iv_mesh;
393 struct ieee80211_mesh_route *rt, *next;
394
395 if (ms == NULL)
396 return;
397 MESH_RT_LOCK(ms);
398 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next)
399 mesh_rt_del(ms, rt);
400 MESH_RT_UNLOCK(ms);
401 }
402
403 void
ieee80211_mesh_rt_flush_peer(struct ieee80211vap * vap,const uint8_t peer[IEEE80211_ADDR_LEN])404 ieee80211_mesh_rt_flush_peer(struct ieee80211vap *vap,
405 const uint8_t peer[IEEE80211_ADDR_LEN])
406 {
407 struct ieee80211_mesh_state *ms = vap->iv_mesh;
408 struct ieee80211_mesh_route *rt, *next;
409
410 MESH_RT_LOCK(ms);
411 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) {
412 if (IEEE80211_ADDR_EQ(rt->rt_nexthop, peer))
413 mesh_rt_del(ms, rt);
414 }
415 MESH_RT_UNLOCK(ms);
416 }
417
418 /*
419 * Flush expired routing entries, i.e. those in invalid state for
420 * some time.
421 */
422 static void
mesh_rt_flush_invalid(struct ieee80211vap * vap)423 mesh_rt_flush_invalid(struct ieee80211vap *vap)
424 {
425 struct ieee80211_mesh_state *ms = vap->iv_mesh;
426 struct ieee80211_mesh_route *rt, *next;
427
428 if (ms == NULL)
429 return;
430 MESH_RT_LOCK(ms);
431 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) {
432 /* Discover paths will be deleted by their own callout */
433 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_DISCOVER)
434 continue;
435 ieee80211_mesh_rt_update(rt, 0);
436 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0)
437 mesh_rt_del(ms, rt);
438 }
439 MESH_RT_UNLOCK(ms);
440 }
441
442 int
ieee80211_mesh_register_proto_path(const struct ieee80211_mesh_proto_path * mpp)443 ieee80211_mesh_register_proto_path(const struct ieee80211_mesh_proto_path *mpp)
444 {
445 int i, firstempty = -1;
446
447 for (i = 0; i < nitems(mesh_proto_paths); i++) {
448 if (strncmp(mpp->mpp_descr, mesh_proto_paths[i].mpp_descr,
449 IEEE80211_MESH_PROTO_DSZ) == 0)
450 return EEXIST;
451 if (!mesh_proto_paths[i].mpp_active && firstempty == -1)
452 firstempty = i;
453 }
454 if (firstempty < 0)
455 return ENOSPC;
456 memcpy(&mesh_proto_paths[firstempty], mpp, sizeof(*mpp));
457 mesh_proto_paths[firstempty].mpp_active = 1;
458 return 0;
459 }
460
461 int
ieee80211_mesh_register_proto_metric(const struct ieee80211_mesh_proto_metric * mpm)462 ieee80211_mesh_register_proto_metric(const struct
463 ieee80211_mesh_proto_metric *mpm)
464 {
465 int i, firstempty = -1;
466
467 for (i = 0; i < nitems(mesh_proto_metrics); i++) {
468 if (strncmp(mpm->mpm_descr, mesh_proto_metrics[i].mpm_descr,
469 IEEE80211_MESH_PROTO_DSZ) == 0)
470 return EEXIST;
471 if (!mesh_proto_metrics[i].mpm_active && firstempty == -1)
472 firstempty = i;
473 }
474 if (firstempty < 0)
475 return ENOSPC;
476 memcpy(&mesh_proto_metrics[firstempty], mpm, sizeof(*mpm));
477 mesh_proto_metrics[firstempty].mpm_active = 1;
478 return 0;
479 }
480
481 static int
mesh_select_proto_path(struct ieee80211vap * vap,const char * name)482 mesh_select_proto_path(struct ieee80211vap *vap, const char *name)
483 {
484 struct ieee80211_mesh_state *ms = vap->iv_mesh;
485 int i;
486
487 for (i = 0; i < nitems(mesh_proto_paths); i++) {
488 if (strcasecmp(mesh_proto_paths[i].mpp_descr, name) == 0) {
489 ms->ms_ppath = &mesh_proto_paths[i];
490 return 0;
491 }
492 }
493 return ENOENT;
494 }
495
496 static int
mesh_select_proto_metric(struct ieee80211vap * vap,const char * name)497 mesh_select_proto_metric(struct ieee80211vap *vap, const char *name)
498 {
499 struct ieee80211_mesh_state *ms = vap->iv_mesh;
500 int i;
501
502 for (i = 0; i < nitems(mesh_proto_metrics); i++) {
503 if (strcasecmp(mesh_proto_metrics[i].mpm_descr, name) == 0) {
504 ms->ms_pmetric = &mesh_proto_metrics[i];
505 return 0;
506 }
507 }
508 return ENOENT;
509 }
510
511 static void
mesh_gatemode_setup(struct ieee80211vap * vap)512 mesh_gatemode_setup(struct ieee80211vap *vap)
513 {
514 struct ieee80211_mesh_state *ms = vap->iv_mesh;
515
516 /*
517 * NB: When a mesh gate is running as a ROOT it shall
518 * not send out periodic GANNs but instead mark the
519 * mesh gate flag for the corresponding proactive PREQ
520 * and RANN frames.
521 */
522 if (ms->ms_flags & IEEE80211_MESHFLAGS_ROOT ||
523 (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) == 0) {
524 callout_drain(&ms->ms_gatetimer);
525 return ;
526 }
527 callout_reset(&ms->ms_gatetimer, ieee80211_mesh_gateint,
528 mesh_gatemode_cb, vap);
529 }
530
531 static void
mesh_gatemode_cb(void * arg)532 mesh_gatemode_cb(void *arg)
533 {
534 struct ieee80211vap *vap = (struct ieee80211vap *)arg;
535 struct ieee80211_mesh_state *ms = vap->iv_mesh;
536 struct ieee80211_meshgann_ie gann;
537
538 gann.gann_flags = 0; /* Reserved */
539 gann.gann_hopcount = 0;
540 gann.gann_ttl = ms->ms_ttl;
541 IEEE80211_ADDR_COPY(gann.gann_addr, vap->iv_myaddr);
542 gann.gann_seq = ms->ms_gateseq++;
543 gann.gann_interval = ieee80211_mesh_gateint;
544
545 IEEE80211_NOTE(vap, IEEE80211_MSG_MESH, vap->iv_bss,
546 "send broadcast GANN (seq %u)", gann.gann_seq);
547
548 ieee80211_send_action(vap->iv_bss, IEEE80211_ACTION_CAT_MESH,
549 IEEE80211_ACTION_MESH_GANN, &gann);
550 mesh_gatemode_setup(vap);
551 }
552
553 static void
ieee80211_mesh_init(void)554 ieee80211_mesh_init(void)
555 {
556
557 memset(mesh_proto_paths, 0, sizeof(mesh_proto_paths));
558 memset(mesh_proto_metrics, 0, sizeof(mesh_proto_metrics));
559
560 /*
561 * Setup mesh parameters that depends on the clock frequency.
562 */
563 ieee80211_mesh_gateint = msecs_to_ticks(10000);
564 ieee80211_mesh_retrytimeout = msecs_to_ticks(40);
565 ieee80211_mesh_holdingtimeout = msecs_to_ticks(40);
566 ieee80211_mesh_confirmtimeout = msecs_to_ticks(40);
567 ieee80211_mesh_backofftimeout = msecs_to_ticks(5000);
568
569 /*
570 * Register action frame handlers.
571 */
572 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
573 IEEE80211_ACTION_MESHPEERING_OPEN,
574 mesh_recv_action_meshpeering_open);
575 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
576 IEEE80211_ACTION_MESHPEERING_CONFIRM,
577 mesh_recv_action_meshpeering_confirm);
578 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
579 IEEE80211_ACTION_MESHPEERING_CLOSE,
580 mesh_recv_action_meshpeering_close);
581 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESH,
582 IEEE80211_ACTION_MESH_LMETRIC, mesh_recv_action_meshlmetric);
583 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESH,
584 IEEE80211_ACTION_MESH_GANN, mesh_recv_action_meshgate);
585
586 ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
587 IEEE80211_ACTION_MESHPEERING_OPEN,
588 mesh_send_action_meshpeering_open);
589 ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
590 IEEE80211_ACTION_MESHPEERING_CONFIRM,
591 mesh_send_action_meshpeering_confirm);
592 ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
593 IEEE80211_ACTION_MESHPEERING_CLOSE,
594 mesh_send_action_meshpeering_close);
595 ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESH,
596 IEEE80211_ACTION_MESH_LMETRIC,
597 mesh_send_action_meshlmetric);
598 ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESH,
599 IEEE80211_ACTION_MESH_GANN,
600 mesh_send_action_meshgate);
601
602 /*
603 * Register Airtime Link Metric.
604 */
605 ieee80211_mesh_register_proto_metric(&mesh_metric_airtime);
606
607 }
608 SYSINIT(wlan_mesh, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_mesh_init, NULL);
609
610 void
ieee80211_mesh_attach(struct ieee80211com * ic)611 ieee80211_mesh_attach(struct ieee80211com *ic)
612 {
613 ic->ic_vattach[IEEE80211_M_MBSS] = mesh_vattach;
614 }
615
616 void
ieee80211_mesh_detach(struct ieee80211com * ic)617 ieee80211_mesh_detach(struct ieee80211com *ic)
618 {
619 }
620
621 static void
mesh_vdetach_peers(void * arg,struct ieee80211_node * ni)622 mesh_vdetach_peers(void *arg, struct ieee80211_node *ni)
623 {
624 struct ieee80211com *ic = ni->ni_ic;
625 uint16_t args[3];
626
627 if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED) {
628 args[0] = ni->ni_mlpid;
629 args[1] = ni->ni_mllid;
630 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
631 ieee80211_send_action(ni,
632 IEEE80211_ACTION_CAT_SELF_PROT,
633 IEEE80211_ACTION_MESHPEERING_CLOSE,
634 args);
635 }
636 callout_drain(&ni->ni_mltimer);
637 /* XXX belongs in hwmp */
638 ieee80211_ageq_drain_node(&ic->ic_stageq,
639 (void *)(uintptr_t) ieee80211_mac_hash(ic, ni->ni_macaddr));
640 }
641
642 static void
mesh_vdetach(struct ieee80211vap * vap)643 mesh_vdetach(struct ieee80211vap *vap)
644 {
645 struct ieee80211_mesh_state *ms = vap->iv_mesh;
646
647 callout_drain(&ms->ms_cleantimer);
648 ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_vdetach_peers,
649 NULL);
650 ieee80211_mesh_rt_flush(vap);
651 MESH_RT_LOCK_DESTROY(ms);
652 ms->ms_ppath->mpp_vdetach(vap);
653 IEEE80211_FREE(vap->iv_mesh, M_80211_VAP);
654 vap->iv_mesh = NULL;
655 }
656
657 static void
mesh_vattach(struct ieee80211vap * vap)658 mesh_vattach(struct ieee80211vap *vap)
659 {
660 struct ieee80211_mesh_state *ms;
661 vap->iv_newstate = mesh_newstate;
662 vap->iv_input = mesh_input;
663 vap->iv_opdetach = mesh_vdetach;
664 vap->iv_recv_mgmt = mesh_recv_mgmt;
665 vap->iv_recv_ctl = mesh_recv_ctl;
666 ms = IEEE80211_MALLOC(sizeof(struct ieee80211_mesh_state), M_80211_VAP,
667 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
668 if (ms == NULL) {
669 printf("%s: couldn't alloc MBSS state\n", __func__);
670 return;
671 }
672 vap->iv_mesh = ms;
673 ms->ms_seq = 0;
674 ms->ms_flags = (IEEE80211_MESHFLAGS_AP | IEEE80211_MESHFLAGS_FWD);
675 ms->ms_ttl = IEEE80211_MESH_DEFAULT_TTL;
676 TAILQ_INIT(&ms->ms_known_gates);
677 TAILQ_INIT(&ms->ms_routes);
678 MESH_RT_LOCK_INIT(ms, "MBSS");
679 callout_init(&ms->ms_cleantimer, 1);
680 callout_init(&ms->ms_gatetimer, 1);
681 ms->ms_gateseq = 0;
682 mesh_select_proto_metric(vap, "AIRTIME");
683 KASSERT(ms->ms_pmetric, ("ms_pmetric == NULL"));
684 mesh_select_proto_path(vap, "HWMP");
685 KASSERT(ms->ms_ppath, ("ms_ppath == NULL"));
686 ms->ms_ppath->mpp_vattach(vap);
687 }
688
689 /*
690 * IEEE80211_M_MBSS vap state machine handler.
691 */
692 static int
mesh_newstate(struct ieee80211vap * vap,enum ieee80211_state nstate,int arg)693 mesh_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
694 {
695 struct ieee80211_mesh_state *ms = vap->iv_mesh;
696 struct ieee80211com *ic = vap->iv_ic;
697 struct ieee80211_node *ni;
698 enum ieee80211_state ostate;
699
700 IEEE80211_LOCK_ASSERT(ic);
701
702 ostate = vap->iv_state;
703 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n",
704 __func__, ieee80211_state_name[ostate],
705 ieee80211_state_name[nstate], arg);
706 vap->iv_state = nstate; /* state transition */
707 if (ostate != IEEE80211_S_SCAN)
708 ieee80211_cancel_scan(vap); /* background scan */
709 ni = vap->iv_bss; /* NB: no reference held */
710 if (nstate != IEEE80211_S_RUN && ostate == IEEE80211_S_RUN) {
711 callout_drain(&ms->ms_cleantimer);
712 callout_drain(&ms->ms_gatetimer);
713 }
714 switch (nstate) {
715 case IEEE80211_S_INIT:
716 switch (ostate) {
717 case IEEE80211_S_SCAN:
718 ieee80211_cancel_scan(vap);
719 break;
720 case IEEE80211_S_CAC:
721 ieee80211_dfs_cac_stop(vap);
722 break;
723 case IEEE80211_S_RUN:
724 ieee80211_iterate_nodes(&ic->ic_sta,
725 mesh_vdetach_peers, NULL);
726 break;
727 default:
728 break;
729 }
730 if (ostate != IEEE80211_S_INIT) {
731 /* NB: optimize INIT -> INIT case */
732 ieee80211_reset_bss(vap);
733 ieee80211_mesh_rt_flush(vap);
734 }
735 break;
736 case IEEE80211_S_SCAN:
737 switch (ostate) {
738 case IEEE80211_S_INIT:
739 if (vap->iv_des_chan != IEEE80211_CHAN_ANYC &&
740 !IEEE80211_IS_CHAN_RADAR(vap->iv_des_chan) &&
741 ms->ms_idlen != 0) {
742 /*
743 * Already have a channel and a mesh ID; bypass
744 * the scan and startup immediately.
745 */
746 ieee80211_create_ibss(vap, vap->iv_des_chan);
747 break;
748 }
749 /*
750 * Initiate a scan. We can come here as a result
751 * of an IEEE80211_IOC_SCAN_REQ too in which case
752 * the vap will be marked with IEEE80211_FEXT_SCANREQ
753 * and the scan request parameters will be present
754 * in iv_scanreq. Otherwise we do the default.
755 */
756 if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) {
757 ieee80211_check_scan(vap,
758 vap->iv_scanreq_flags,
759 vap->iv_scanreq_duration,
760 vap->iv_scanreq_mindwell,
761 vap->iv_scanreq_maxdwell,
762 vap->iv_scanreq_nssid, vap->iv_scanreq_ssid);
763 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ;
764 } else
765 ieee80211_check_scan_current(vap);
766 break;
767 default:
768 break;
769 }
770 break;
771 case IEEE80211_S_CAC:
772 /*
773 * Start CAC on a DFS channel. We come here when starting
774 * a bss on a DFS channel (see ieee80211_create_ibss).
775 */
776 ieee80211_dfs_cac_start(vap);
777 break;
778 case IEEE80211_S_RUN:
779 switch (ostate) {
780 case IEEE80211_S_INIT:
781 /*
782 * Already have a channel; bypass the
783 * scan and startup immediately.
784 * Note that ieee80211_create_ibss will call
785 * back to do a RUN->RUN state change.
786 */
787 ieee80211_create_ibss(vap,
788 ieee80211_ht_adjust_channel(ic,
789 ic->ic_curchan, vap->iv_flags_ht));
790 /* NB: iv_bss is changed on return */
791 break;
792 case IEEE80211_S_CAC:
793 /*
794 * NB: This is the normal state change when CAC
795 * expires and no radar was detected; no need to
796 * clear the CAC timer as it's already expired.
797 */
798 /* fall thru... */
799 case IEEE80211_S_CSA:
800 #if 0
801 /*
802 * Shorten inactivity timer of associated stations
803 * to weed out sta's that don't follow a CSA.
804 */
805 ieee80211_iterate_nodes(&ic->ic_sta, sta_csa, vap);
806 #endif
807 /*
808 * Update bss node channel to reflect where
809 * we landed after CSA.
810 */
811 ieee80211_node_set_chan(ni,
812 ieee80211_ht_adjust_channel(ic, ic->ic_curchan,
813 ieee80211_htchanflags(ni->ni_chan)));
814 /* XXX bypass debug msgs */
815 break;
816 case IEEE80211_S_SCAN:
817 case IEEE80211_S_RUN:
818 #ifdef IEEE80211_DEBUG
819 if (ieee80211_msg_debug(vap)) {
820 ieee80211_note(vap,
821 "synchronized with %s meshid ",
822 ether_sprintf(ni->ni_meshid));
823 ieee80211_print_essid(ni->ni_meshid,
824 ni->ni_meshidlen);
825 /* XXX MCS/HT */
826 printf(" channel %d\n",
827 ieee80211_chan2ieee(ic, ic->ic_curchan));
828 }
829 #endif
830 break;
831 default:
832 break;
833 }
834 ieee80211_node_authorize(ni);
835 callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact,
836 mesh_rt_cleanup_cb, vap);
837 mesh_gatemode_setup(vap);
838 break;
839 default:
840 break;
841 }
842 /* NB: ostate not nstate */
843 ms->ms_ppath->mpp_newstate(vap, ostate, arg);
844 return 0;
845 }
846
847 static void
mesh_rt_cleanup_cb(void * arg)848 mesh_rt_cleanup_cb(void *arg)
849 {
850 struct ieee80211vap *vap = arg;
851 struct ieee80211_mesh_state *ms = vap->iv_mesh;
852
853 mesh_rt_flush_invalid(vap);
854 callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact,
855 mesh_rt_cleanup_cb, vap);
856 }
857
858 /*
859 * Mark a mesh STA as gate and return a pointer to it.
860 * If this is first time, we create a new gate route.
861 * Always update the path route to this mesh gate.
862 */
863 struct ieee80211_mesh_gate_route *
ieee80211_mesh_mark_gate(struct ieee80211vap * vap,const uint8_t * addr,struct ieee80211_mesh_route * rt)864 ieee80211_mesh_mark_gate(struct ieee80211vap *vap, const uint8_t *addr,
865 struct ieee80211_mesh_route *rt)
866 {
867 struct ieee80211_mesh_state *ms = vap->iv_mesh;
868 struct ieee80211_mesh_gate_route *gr = NULL, *next;
869 int found = 0;
870
871 MESH_RT_LOCK(ms);
872 TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) {
873 if (IEEE80211_ADDR_EQ(gr->gr_addr, addr)) {
874 found = 1;
875 break;
876 }
877 }
878
879 if (!found) {
880 /* New mesh gate add it to known table. */
881 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, addr,
882 "%s", "stored new gate information from pro-PREQ.");
883 gr = IEEE80211_MALLOC(ALIGN(sizeof(struct ieee80211_mesh_gate_route)),
884 M_80211_MESH_GT_RT,
885 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
886 IEEE80211_ADDR_COPY(gr->gr_addr, addr);
887 TAILQ_INSERT_TAIL(&ms->ms_known_gates, gr, gr_next);
888 }
889 gr->gr_route = rt;
890 /* TODO: link from path route to gate route */
891 MESH_RT_UNLOCK(ms);
892
893 return gr;
894 }
895
896 /*
897 * Helper function to note the Mesh Peer Link FSM change.
898 */
899 static void
mesh_linkchange(struct ieee80211_node * ni,enum ieee80211_mesh_mlstate state)900 mesh_linkchange(struct ieee80211_node *ni, enum ieee80211_mesh_mlstate state)
901 {
902 struct ieee80211vap *vap = ni->ni_vap;
903 struct ieee80211_mesh_state *ms = vap->iv_mesh;
904 #ifdef IEEE80211_DEBUG
905 static const char *meshlinkstates[] = {
906 [IEEE80211_NODE_MESH_IDLE] = "IDLE",
907 [IEEE80211_NODE_MESH_OPENSNT] = "OPEN SENT",
908 [IEEE80211_NODE_MESH_OPENRCV] = "OPEN RECEIVED",
909 [IEEE80211_NODE_MESH_CONFIRMRCV] = "CONFIRM RECEIVED",
910 [IEEE80211_NODE_MESH_ESTABLISHED] = "ESTABLISHED",
911 [IEEE80211_NODE_MESH_HOLDING] = "HOLDING"
912 };
913 #endif
914 IEEE80211_NOTE(vap, IEEE80211_MSG_MESH,
915 ni, "peer link: %s -> %s",
916 meshlinkstates[ni->ni_mlstate], meshlinkstates[state]);
917
918 /* track neighbor count */
919 if (state == IEEE80211_NODE_MESH_ESTABLISHED &&
920 ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) {
921 KASSERT(ms->ms_neighbors < 65535, ("neighbor count overflow"));
922 ms->ms_neighbors++;
923 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF);
924 } else if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED &&
925 state != IEEE80211_NODE_MESH_ESTABLISHED) {
926 KASSERT(ms->ms_neighbors > 0, ("neighbor count 0"));
927 ms->ms_neighbors--;
928 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF);
929 }
930 ni->ni_mlstate = state;
931 switch (state) {
932 case IEEE80211_NODE_MESH_HOLDING:
933 ms->ms_ppath->mpp_peerdown(ni);
934 break;
935 case IEEE80211_NODE_MESH_ESTABLISHED:
936 ieee80211_mesh_discover(vap, ni->ni_macaddr, NULL);
937 break;
938 default:
939 break;
940 }
941 }
942
943 /*
944 * Helper function to generate a unique local ID required for mesh
945 * peer establishment.
946 */
947 static void
mesh_checkid(void * arg,struct ieee80211_node * ni)948 mesh_checkid(void *arg, struct ieee80211_node *ni)
949 {
950 uint16_t *r = arg;
951
952 if (*r == ni->ni_mllid)
953 *(uint16_t *)arg = 0;
954 }
955
956 static uint32_t
mesh_generateid(struct ieee80211vap * vap)957 mesh_generateid(struct ieee80211vap *vap)
958 {
959 int maxiter = 4;
960 uint16_t r;
961
962 do {
963 net80211_get_random_bytes(&r, 2);
964 ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_checkid, &r);
965 maxiter--;
966 } while (r == 0 && maxiter > 0);
967 return r;
968 }
969
970 /*
971 * Verifies if we already received this packet by checking its
972 * sequence number.
973 * Returns 0 if the frame is to be accepted, 1 otherwise.
974 */
975 static int
mesh_checkpseq(struct ieee80211vap * vap,const uint8_t source[IEEE80211_ADDR_LEN],uint32_t seq)976 mesh_checkpseq(struct ieee80211vap *vap,
977 const uint8_t source[IEEE80211_ADDR_LEN], uint32_t seq)
978 {
979 struct ieee80211_mesh_route *rt;
980
981 rt = ieee80211_mesh_rt_find(vap, source);
982 if (rt == NULL) {
983 rt = ieee80211_mesh_rt_add(vap, source);
984 if (rt == NULL) {
985 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source,
986 "%s", "add mcast route failed");
987 vap->iv_stats.is_mesh_rtaddfailed++;
988 return 1;
989 }
990 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source,
991 "add mcast route, mesh seqno %d", seq);
992 rt->rt_lastmseq = seq;
993 return 0;
994 }
995 if (IEEE80211_MESH_SEQ_GEQ(rt->rt_lastmseq, seq)) {
996 return 1;
997 } else {
998 rt->rt_lastmseq = seq;
999 return 0;
1000 }
1001 }
1002
1003 /*
1004 * Iterate the routing table and locate the next hop.
1005 */
1006 struct ieee80211_node *
ieee80211_mesh_find_txnode(struct ieee80211vap * vap,const uint8_t dest[IEEE80211_ADDR_LEN])1007 ieee80211_mesh_find_txnode(struct ieee80211vap *vap,
1008 const uint8_t dest[IEEE80211_ADDR_LEN])
1009 {
1010 struct ieee80211_mesh_route *rt;
1011
1012 rt = ieee80211_mesh_rt_find(vap, dest);
1013 if (rt == NULL)
1014 return NULL;
1015 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) {
1016 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
1017 "%s: !valid, flags 0x%x", __func__, rt->rt_flags);
1018 /* XXX stat */
1019 return NULL;
1020 }
1021 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) {
1022 rt = ieee80211_mesh_rt_find(vap, rt->rt_mesh_gate);
1023 if (rt == NULL) return NULL;
1024 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) {
1025 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
1026 "%s: meshgate !valid, flags 0x%x", __func__,
1027 rt->rt_flags);
1028 /* XXX stat */
1029 return NULL;
1030 }
1031 }
1032 return ieee80211_find_txnode(vap, rt->rt_nexthop);
1033 }
1034
1035 static void
mesh_transmit_to_gate(struct ieee80211vap * vap,struct mbuf * m,struct ieee80211_mesh_route * rt_gate)1036 mesh_transmit_to_gate(struct ieee80211vap *vap, struct mbuf *m,
1037 struct ieee80211_mesh_route *rt_gate)
1038 {
1039 struct ifnet *ifp = vap->iv_ifp;
1040 struct ieee80211_node *ni;
1041
1042 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
1043
1044 ni = ieee80211_mesh_find_txnode(vap, rt_gate->rt_dest);
1045 if (ni == NULL) {
1046 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
1047 m_freem(m);
1048 return;
1049 }
1050
1051 /*
1052 * Send through the VAP packet transmit path.
1053 * This consumes the node ref grabbed above and
1054 * the mbuf, regardless of whether there's a problem
1055 * or not.
1056 */
1057 (void) ieee80211_vap_pkt_send_dest(vap, m, ni);
1058 }
1059
1060 /*
1061 * Forward the queued frames to known valid mesh gates.
1062 * Assume destination to be outside the MBSS (i.e. proxy entry),
1063 * If no valid mesh gates are known silently discard queued frames.
1064 * After transmitting frames to all known valid mesh gates, this route
1065 * will be marked invalid, and a new path discovery will happen in the hopes
1066 * that (at least) one of the mesh gates have a new proxy entry for us to use.
1067 */
1068 void
ieee80211_mesh_forward_to_gates(struct ieee80211vap * vap,struct ieee80211_mesh_route * rt_dest)1069 ieee80211_mesh_forward_to_gates(struct ieee80211vap *vap,
1070 struct ieee80211_mesh_route *rt_dest)
1071 {
1072 struct ieee80211com *ic = vap->iv_ic;
1073 struct ieee80211_mesh_state *ms = vap->iv_mesh;
1074 struct ieee80211_mesh_route *rt_gate;
1075 struct ieee80211_mesh_gate_route *gr = NULL, *gr_next;
1076 struct mbuf *m, *mcopy, *next;
1077
1078 IEEE80211_TX_UNLOCK_ASSERT(ic);
1079
1080 KASSERT( rt_dest->rt_flags == IEEE80211_MESHRT_FLAGS_DISCOVER,
1081 ("Route is not marked with IEEE80211_MESHRT_FLAGS_DISCOVER"));
1082
1083 /* XXX: send to more than one valid mash gate */
1084 MESH_RT_LOCK(ms);
1085
1086 m = ieee80211_ageq_remove(&ic->ic_stageq,
1087 (struct ieee80211_node *)(uintptr_t)
1088 ieee80211_mac_hash(ic, rt_dest->rt_dest));
1089
1090 TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, gr_next) {
1091 rt_gate = gr->gr_route;
1092 if (rt_gate == NULL) {
1093 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP,
1094 rt_dest->rt_dest,
1095 "mesh gate with no path %6D",
1096 gr->gr_addr, ":");
1097 continue;
1098 }
1099 if ((rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0)
1100 continue;
1101 KASSERT(rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_GATE,
1102 ("route not marked as a mesh gate"));
1103 KASSERT((rt_gate->rt_flags &
1104 IEEE80211_MESHRT_FLAGS_PROXY) == 0,
1105 ("found mesh gate that is also marked porxy"));
1106 /*
1107 * convert route to a proxy route gated by the current
1108 * mesh gate, this is needed so encap can built data
1109 * frame with correct address.
1110 */
1111 rt_dest->rt_flags = IEEE80211_MESHRT_FLAGS_PROXY |
1112 IEEE80211_MESHRT_FLAGS_VALID;
1113 rt_dest->rt_ext_seq = 1; /* random value */
1114 IEEE80211_ADDR_COPY(rt_dest->rt_mesh_gate, rt_gate->rt_dest);
1115 IEEE80211_ADDR_COPY(rt_dest->rt_nexthop, rt_gate->rt_nexthop);
1116 rt_dest->rt_metric = rt_gate->rt_metric;
1117 rt_dest->rt_nhops = rt_gate->rt_nhops;
1118 ieee80211_mesh_rt_update(rt_dest, ms->ms_ppath->mpp_inact);
1119 MESH_RT_UNLOCK(ms);
1120 /* XXX: lock?? */
1121 mcopy = m_dup(m, IEEE80211_M_NOWAIT);
1122 for (; mcopy != NULL; mcopy = next) {
1123 next = mcopy->m_nextpkt;
1124 mcopy->m_nextpkt = NULL;
1125 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP,
1126 rt_dest->rt_dest,
1127 "flush queued frame %p len %d", mcopy,
1128 mcopy->m_pkthdr.len);
1129 mesh_transmit_to_gate(vap, mcopy, rt_gate);
1130 }
1131 MESH_RT_LOCK(ms);
1132 }
1133 rt_dest->rt_flags = 0; /* Mark invalid */
1134 m_freem(m);
1135 MESH_RT_UNLOCK(ms);
1136 }
1137
1138 /*
1139 * Forward the specified frame.
1140 * Decrement the TTL and set TA to our MAC address.
1141 */
1142 static void
mesh_forward(struct ieee80211vap * vap,struct mbuf * m,const struct ieee80211_meshcntl * mc)1143 mesh_forward(struct ieee80211vap *vap, struct mbuf *m,
1144 const struct ieee80211_meshcntl *mc)
1145 {
1146 struct ieee80211com *ic = vap->iv_ic;
1147 struct ieee80211_mesh_state *ms = vap->iv_mesh;
1148 struct ifnet *ifp = vap->iv_ifp;
1149 const struct ieee80211_frame *wh =
1150 mtod(m, const struct ieee80211_frame *);
1151 struct mbuf *mcopy;
1152 struct ieee80211_meshcntl *mccopy;
1153 struct ieee80211_frame *whcopy;
1154 struct ieee80211_node *ni;
1155 int err;
1156
1157 /* This is called from the RX path - don't hold this lock */
1158 IEEE80211_TX_UNLOCK_ASSERT(ic);
1159
1160 /*
1161 * mesh ttl of 1 means we are the last one receiving it,
1162 * according to amendment we decrement and then check if
1163 * 0, if so we dont forward.
1164 */
1165 if (mc->mc_ttl < 1) {
1166 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1167 "%s", "frame not fwd'd, ttl 1");
1168 vap->iv_stats.is_mesh_fwd_ttl++;
1169 return;
1170 }
1171 if (!(ms->ms_flags & IEEE80211_MESHFLAGS_FWD)) {
1172 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1173 "%s", "frame not fwd'd, fwding disabled");
1174 vap->iv_stats.is_mesh_fwd_disabled++;
1175 return;
1176 }
1177 mcopy = m_dup(m, IEEE80211_M_NOWAIT);
1178 if (mcopy == NULL) {
1179 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1180 "%s", "frame not fwd'd, cannot dup");
1181 vap->iv_stats.is_mesh_fwd_nobuf++;
1182 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
1183 return;
1184 }
1185 mcopy = m_pullup(mcopy, ieee80211_hdrspace(ic, wh) +
1186 sizeof(struct ieee80211_meshcntl));
1187 if (mcopy == NULL) {
1188 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1189 "%s", "frame not fwd'd, too short");
1190 vap->iv_stats.is_mesh_fwd_tooshort++;
1191 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
1192 m_freem(mcopy);
1193 return;
1194 }
1195 whcopy = mtod(mcopy, struct ieee80211_frame *);
1196 mccopy = (struct ieee80211_meshcntl *)
1197 (mtod(mcopy, uint8_t *) + ieee80211_hdrspace(ic, wh));
1198 /* XXX clear other bits? */
1199 whcopy->i_fc[1] &= ~IEEE80211_FC1_RETRY;
1200 IEEE80211_ADDR_COPY(whcopy->i_addr2, vap->iv_myaddr);
1201 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1202 ni = ieee80211_ref_node(vap->iv_bss);
1203 mcopy->m_flags |= M_MCAST;
1204 } else {
1205 ni = ieee80211_mesh_find_txnode(vap, whcopy->i_addr3);
1206 if (ni == NULL) {
1207 /*
1208 * [Optional] any of the following three actions:
1209 * o silently discard
1210 * o trigger a path discovery
1211 * o inform TA that meshDA is unknown.
1212 */
1213 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1214 "%s", "frame not fwd'd, no path");
1215 ms->ms_ppath->mpp_senderror(vap, whcopy->i_addr3, NULL,
1216 IEEE80211_REASON_MESH_PERR_NO_FI);
1217 vap->iv_stats.is_mesh_fwd_nopath++;
1218 m_freem(mcopy);
1219 return;
1220 }
1221 IEEE80211_ADDR_COPY(whcopy->i_addr1, ni->ni_macaddr);
1222 }
1223 KASSERT(mccopy->mc_ttl > 0, ("%s called with wrong ttl", __func__));
1224 mccopy->mc_ttl--;
1225
1226 /* XXX calculate priority so drivers can find the tx queue */
1227 M_WME_SETAC(mcopy, WME_AC_BE);
1228
1229 /* XXX do we know m_nextpkt is NULL? */
1230 MPASS((mcopy->m_pkthdr.csum_flags & CSUM_SND_TAG) == 0);
1231 mcopy->m_pkthdr.rcvif = (void *) ni;
1232
1233 /*
1234 * XXX this bypasses all of the VAP TX handling; it passes frames
1235 * directly to the parent interface.
1236 *
1237 * Because of this, there's no TX lock being held as there's no
1238 * encaps state being used.
1239 *
1240 * Doing a direct parent transmit may not be the correct thing
1241 * to do here; we'll have to re-think this soon.
1242 */
1243 IEEE80211_TX_LOCK(ic);
1244 err = ieee80211_parent_xmitpkt(ic, mcopy);
1245 IEEE80211_TX_UNLOCK(ic);
1246 if (!err)
1247 if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1);
1248 }
1249
1250 static struct mbuf *
mesh_decap(struct ieee80211vap * vap,struct mbuf * m,int hdrlen,int meshdrlen)1251 mesh_decap(struct ieee80211vap *vap, struct mbuf *m, int hdrlen, int meshdrlen)
1252 {
1253 #define WHDIR(wh) ((wh)->i_fc[1] & IEEE80211_FC1_DIR_MASK)
1254 #define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc)
1255 uint8_t b[sizeof(struct ieee80211_qosframe_addr4) +
1256 sizeof(struct ieee80211_meshcntl_ae10)];
1257 const struct ieee80211_qosframe_addr4 *wh;
1258 const struct ieee80211_meshcntl_ae10 *mc;
1259 struct ether_header *eh;
1260 struct llc *llc;
1261 int ae;
1262
1263 if (m->m_len < hdrlen + sizeof(*llc) &&
1264 (m = m_pullup(m, hdrlen + sizeof(*llc))) == NULL) {
1265 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ANY,
1266 "discard data frame: %s", "m_pullup failed");
1267 vap->iv_stats.is_rx_tooshort++;
1268 return NULL;
1269 }
1270 memcpy(b, mtod(m, caddr_t), hdrlen);
1271 wh = (const struct ieee80211_qosframe_addr4 *)&b[0];
1272 mc = (const struct ieee80211_meshcntl_ae10 *)&b[hdrlen - meshdrlen];
1273 KASSERT(WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS ||
1274 WHDIR(wh) == IEEE80211_FC1_DIR_DSTODS,
1275 ("bogus dir, fc 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1]));
1276
1277 llc = (struct llc *)(mtod(m, caddr_t) + hdrlen);
1278 if (llc->llc_dsap == LLC_SNAP_LSAP && llc->llc_ssap == LLC_SNAP_LSAP &&
1279 llc->llc_control == LLC_UI && llc->llc_snap.org_code[0] == 0 &&
1280 llc->llc_snap.org_code[1] == 0 && llc->llc_snap.org_code[2] == 0 &&
1281 /* NB: preserve AppleTalk frames that have a native SNAP hdr */
1282 !(llc->llc_snap.ether_type == htons(ETHERTYPE_AARP) ||
1283 llc->llc_snap.ether_type == htons(ETHERTYPE_IPX))) {
1284 m_adj(m, hdrlen + sizeof(struct llc) - sizeof(*eh));
1285 llc = NULL;
1286 } else {
1287 m_adj(m, hdrlen - sizeof(*eh));
1288 }
1289 eh = mtod(m, struct ether_header *);
1290 ae = mc->mc_flags & IEEE80211_MESH_AE_MASK;
1291 if (WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS) {
1292 IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr1);
1293 if (ae == IEEE80211_MESH_AE_00) {
1294 IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr3);
1295 } else if (ae == IEEE80211_MESH_AE_01) {
1296 IEEE80211_ADDR_COPY(eh->ether_shost,
1297 MC01(mc)->mc_addr4);
1298 } else {
1299 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1300 (const struct ieee80211_frame *)wh, NULL,
1301 "bad AE %d", ae);
1302 vap->iv_stats.is_mesh_badae++;
1303 m_freem(m);
1304 return NULL;
1305 }
1306 } else {
1307 if (ae == IEEE80211_MESH_AE_00) {
1308 IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr3);
1309 IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr4);
1310 } else if (ae == IEEE80211_MESH_AE_10) {
1311 IEEE80211_ADDR_COPY(eh->ether_dhost, mc->mc_addr5);
1312 IEEE80211_ADDR_COPY(eh->ether_shost, mc->mc_addr6);
1313 } else {
1314 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1315 (const struct ieee80211_frame *)wh, NULL,
1316 "bad AE %d", ae);
1317 vap->iv_stats.is_mesh_badae++;
1318 m_freem(m);
1319 return NULL;
1320 }
1321 }
1322 #ifndef __NO_STRICT_ALIGNMENT
1323 if (!ALIGNED_POINTER(mtod(m, caddr_t) + sizeof(*eh), uint32_t)) {
1324 m = ieee80211_realign(vap, m, sizeof(*eh));
1325 if (m == NULL)
1326 return NULL;
1327 }
1328 #endif /* !__NO_STRICT_ALIGNMENT */
1329 if (llc != NULL) {
1330 eh = mtod(m, struct ether_header *);
1331 eh->ether_type = htons(m->m_pkthdr.len - sizeof(*eh));
1332 }
1333 return m;
1334 #undef WDIR
1335 #undef MC01
1336 }
1337
1338 /*
1339 * Return non-zero if the unicast mesh data frame should be processed
1340 * locally. Frames that are not proxy'd have our address, otherwise
1341 * we need to consult the routing table to look for a proxy entry.
1342 */
1343 static __inline int
mesh_isucastforme(struct ieee80211vap * vap,const struct ieee80211_frame * wh,const struct ieee80211_meshcntl * mc)1344 mesh_isucastforme(struct ieee80211vap *vap, const struct ieee80211_frame *wh,
1345 const struct ieee80211_meshcntl *mc)
1346 {
1347 int ae = mc->mc_flags & 3;
1348
1349 KASSERT((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) == IEEE80211_FC1_DIR_DSTODS,
1350 ("bad dir 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1]));
1351 KASSERT(ae == IEEE80211_MESH_AE_00 || ae == IEEE80211_MESH_AE_10,
1352 ("bad AE %d", ae));
1353 if (ae == IEEE80211_MESH_AE_10) { /* ucast w/ proxy */
1354 const struct ieee80211_meshcntl_ae10 *mc10 =
1355 (const struct ieee80211_meshcntl_ae10 *) mc;
1356 struct ieee80211_mesh_route *rt =
1357 ieee80211_mesh_rt_find(vap, mc10->mc_addr5);
1358 /* check for proxy route to ourself */
1359 return (rt != NULL &&
1360 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY));
1361 } else /* ucast w/o proxy */
1362 return IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_myaddr);
1363 }
1364
1365 /*
1366 * Verifies transmitter, updates lifetime, precursor list and forwards data.
1367 * > 0 means we have forwarded data and no need to process locally
1368 * == 0 means we want to process locally (and we may have forwarded data
1369 * < 0 means there was an error and data should be discarded
1370 */
1371 static int
mesh_recv_indiv_data_to_fwrd(struct ieee80211vap * vap,struct mbuf * m,struct ieee80211_frame * wh,const struct ieee80211_meshcntl * mc)1372 mesh_recv_indiv_data_to_fwrd(struct ieee80211vap *vap, struct mbuf *m,
1373 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc)
1374 {
1375 struct ieee80211_qosframe_addr4 *qwh;
1376 struct ieee80211_mesh_state *ms = vap->iv_mesh;
1377 struct ieee80211_mesh_route *rt_meshda, *rt_meshsa;
1378
1379 /* This is called from the RX path - don't hold this lock */
1380 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
1381
1382 qwh = (struct ieee80211_qosframe_addr4 *)wh;
1383
1384 /*
1385 * TODO:
1386 * o verify addr2 is a legitimate transmitter
1387 * o lifetime of precursor of addr3 (addr2) is max(init, curr)
1388 * o lifetime of precursor of addr4 (nexthop) is max(init, curr)
1389 */
1390
1391 /* set lifetime of addr3 (meshDA) to initial value */
1392 rt_meshda = ieee80211_mesh_rt_find(vap, qwh->i_addr3);
1393 if (rt_meshda == NULL) {
1394 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, qwh->i_addr2,
1395 "no route to meshDA(%6D)", qwh->i_addr3, ":");
1396 /*
1397 * [Optional] any of the following three actions:
1398 * o silently discard [X]
1399 * o trigger a path discovery [ ]
1400 * o inform TA that meshDA is unknown. [ ]
1401 */
1402 /* XXX: stats */
1403 return (-1);
1404 }
1405
1406 ieee80211_mesh_rt_update(rt_meshda, ticks_to_msecs(
1407 ms->ms_ppath->mpp_inact));
1408
1409 /* set lifetime of addr4 (meshSA) to initial value */
1410 rt_meshsa = ieee80211_mesh_rt_find(vap, qwh->i_addr4);
1411 KASSERT(rt_meshsa != NULL, ("no route"));
1412 ieee80211_mesh_rt_update(rt_meshsa, ticks_to_msecs(
1413 ms->ms_ppath->mpp_inact));
1414
1415 mesh_forward(vap, m, mc);
1416 return (1); /* dont process locally */
1417 }
1418
1419 /*
1420 * Verifies transmitter, updates lifetime, precursor list and process data
1421 * locally, if data is proxy with AE = 10 it could mean data should go
1422 * on another mesh path or data should be forwarded to the DS.
1423 *
1424 * > 0 means we have forwarded data and no need to process locally
1425 * == 0 means we want to process locally (and we may have forwarded data
1426 * < 0 means there was an error and data should be discarded
1427 */
1428 static int
mesh_recv_indiv_data_to_me(struct ieee80211vap * vap,struct mbuf * m,struct ieee80211_frame * wh,const struct ieee80211_meshcntl * mc)1429 mesh_recv_indiv_data_to_me(struct ieee80211vap *vap, struct mbuf *m,
1430 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc)
1431 {
1432 struct ieee80211_qosframe_addr4 *qwh;
1433 const struct ieee80211_meshcntl_ae10 *mc10;
1434 struct ieee80211_mesh_state *ms = vap->iv_mesh;
1435 struct ieee80211_mesh_route *rt;
1436 int ae;
1437
1438 /* This is called from the RX path - don't hold this lock */
1439 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
1440
1441 qwh = (struct ieee80211_qosframe_addr4 *)wh;
1442 mc10 = (const struct ieee80211_meshcntl_ae10 *)mc;
1443
1444 /*
1445 * TODO:
1446 * o verify addr2 is a legitimate transmitter
1447 * o lifetime of precursor entry is max(init, curr)
1448 */
1449
1450 /* set lifetime of addr4 (meshSA) to initial value */
1451 rt = ieee80211_mesh_rt_find(vap, qwh->i_addr4);
1452 KASSERT(rt != NULL, ("no route"));
1453 ieee80211_mesh_rt_update(rt, ticks_to_msecs(ms->ms_ppath->mpp_inact));
1454 rt = NULL;
1455
1456 ae = mc10->mc_flags & IEEE80211_MESH_AE_MASK;
1457 KASSERT(ae == IEEE80211_MESH_AE_00 ||
1458 ae == IEEE80211_MESH_AE_10, ("bad AE %d", ae));
1459 if (ae == IEEE80211_MESH_AE_10) {
1460 if (IEEE80211_ADDR_EQ(mc10->mc_addr5, qwh->i_addr3)) {
1461 return (0); /* process locally */
1462 }
1463
1464 rt = ieee80211_mesh_rt_find(vap, mc10->mc_addr5);
1465 if (rt != NULL &&
1466 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) &&
1467 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) == 0) {
1468 /*
1469 * Forward on another mesh-path, according to
1470 * amendment as specified in 9.32.4.1
1471 */
1472 IEEE80211_ADDR_COPY(qwh->i_addr3, mc10->mc_addr5);
1473 mesh_forward(vap, m,
1474 (const struct ieee80211_meshcntl *)mc10);
1475 return (1); /* dont process locally */
1476 }
1477 /*
1478 * All other cases: forward of MSDUs from the MBSS to DS indiv.
1479 * addressed according to 13.11.3.2.
1480 */
1481 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, qwh->i_addr2,
1482 "forward frame to DS, SA(%6D) DA(%6D)",
1483 mc10->mc_addr6, ":", mc10->mc_addr5, ":");
1484 }
1485 return (0); /* process locally */
1486 }
1487
1488 /*
1489 * Try to forward the group addressed data on to other mesh STAs, and
1490 * also to the DS.
1491 *
1492 * > 0 means we have forwarded data and no need to process locally
1493 * == 0 means we want to process locally (and we may have forwarded data
1494 * < 0 means there was an error and data should be discarded
1495 */
1496 static int
mesh_recv_group_data(struct ieee80211vap * vap,struct mbuf * m,struct ieee80211_frame * wh,const struct ieee80211_meshcntl * mc)1497 mesh_recv_group_data(struct ieee80211vap *vap, struct mbuf *m,
1498 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc)
1499 {
1500 #define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc)
1501 struct ieee80211_mesh_state *ms = vap->iv_mesh;
1502
1503 /* This is called from the RX path - don't hold this lock */
1504 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
1505
1506 mesh_forward(vap, m, mc);
1507
1508 if(mc->mc_ttl > 0) {
1509 if (mc->mc_flags & IEEE80211_MESH_AE_01) {
1510 /*
1511 * Forward of MSDUs from the MBSS to DS group addressed
1512 * (according to 13.11.3.2)
1513 * This happens by delivering the packet, and a bridge
1514 * will sent it on another port member.
1515 */
1516 if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE &&
1517 ms->ms_flags & IEEE80211_MESHFLAGS_FWD) {
1518 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH,
1519 MC01(mc)->mc_addr4, "%s",
1520 "forward from MBSS to the DS");
1521 }
1522 }
1523 }
1524 return (0); /* process locally */
1525 #undef MC01
1526 }
1527
1528 static int
mesh_input(struct ieee80211_node * ni,struct mbuf * m,const struct ieee80211_rx_stats * rxs,int rssi,int nf)1529 mesh_input(struct ieee80211_node *ni, struct mbuf *m,
1530 const struct ieee80211_rx_stats *rxs, int rssi, int nf)
1531 {
1532 #define HAS_SEQ(type) ((type & 0x4) == 0)
1533 #define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc)
1534 struct ieee80211vap *vap = ni->ni_vap;
1535 struct ieee80211com *ic = ni->ni_ic;
1536 struct ifnet *ifp = vap->iv_ifp;
1537 struct ieee80211_frame *wh;
1538 const struct ieee80211_meshcntl *mc;
1539 int hdrspace, meshdrlen, need_tap, error;
1540 uint8_t dir, type, subtype, ae;
1541 uint32_t seq;
1542 const uint8_t *addr;
1543 uint8_t qos[2];
1544
1545 KASSERT(ni != NULL, ("null node"));
1546 ni->ni_inact = ni->ni_inact_reload;
1547
1548 need_tap = 1; /* mbuf need to be tapped. */
1549 type = -1; /* undefined */
1550
1551 /* This is called from the RX path - don't hold this lock */
1552 IEEE80211_TX_UNLOCK_ASSERT(ic);
1553
1554 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) {
1555 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1556 ni->ni_macaddr, NULL,
1557 "too short (1): len %u", m->m_pkthdr.len);
1558 vap->iv_stats.is_rx_tooshort++;
1559 goto out;
1560 }
1561 /*
1562 * Bit of a cheat here, we use a pointer for a 3-address
1563 * frame format but don't reference fields past outside
1564 * ieee80211_frame_min w/o first validating the data is
1565 * present.
1566 */
1567 wh = mtod(m, struct ieee80211_frame *);
1568
1569 if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) !=
1570 IEEE80211_FC0_VERSION_0) {
1571 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1572 ni->ni_macaddr, NULL, "wrong version %x", wh->i_fc[0]);
1573 vap->iv_stats.is_rx_badversion++;
1574 goto err;
1575 }
1576 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK;
1577 type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK;
1578 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK;
1579 if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) {
1580 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi);
1581 ni->ni_noise = nf;
1582 if (HAS_SEQ(type)) {
1583 uint8_t tid = ieee80211_gettid(wh);
1584
1585 if (IEEE80211_QOS_HAS_SEQ(wh) &&
1586 TID_TO_WME_AC(tid) >= WME_AC_VI)
1587 ic->ic_wme.wme_hipri_traffic++;
1588 if (! ieee80211_check_rxseq(ni, wh, wh->i_addr1, rxs))
1589 goto out;
1590 }
1591 }
1592 #ifdef IEEE80211_DEBUG
1593 /*
1594 * It's easier, but too expensive, to simulate different mesh
1595 * topologies by consulting the ACL policy very early, so do this
1596 * only under DEBUG.
1597 *
1598 * NB: this check is also done upon peering link initiation.
1599 */
1600 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) {
1601 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL,
1602 wh, NULL, "%s", "disallowed by ACL");
1603 vap->iv_stats.is_rx_acl++;
1604 goto out;
1605 }
1606 #endif
1607 switch (type) {
1608 case IEEE80211_FC0_TYPE_DATA:
1609 if (ni == vap->iv_bss)
1610 goto out;
1611 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) {
1612 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
1613 ni->ni_macaddr, NULL,
1614 "peer link not yet established (%d)",
1615 ni->ni_mlstate);
1616 vap->iv_stats.is_mesh_nolink++;
1617 goto out;
1618 }
1619 if (dir != IEEE80211_FC1_DIR_FROMDS &&
1620 dir != IEEE80211_FC1_DIR_DSTODS) {
1621 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1622 wh, "data", "incorrect dir 0x%x", dir);
1623 vap->iv_stats.is_rx_wrongdir++;
1624 goto err;
1625 }
1626
1627 /* All Mesh data frames are QoS subtype */
1628 if (!HAS_SEQ(type)) {
1629 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1630 wh, "data", "incorrect subtype 0x%x", subtype);
1631 vap->iv_stats.is_rx_badsubtype++;
1632 goto err;
1633 }
1634
1635 /*
1636 * Next up, any fragmentation.
1637 * XXX: we defrag before we even try to forward,
1638 * Mesh Control field is not present in sub-sequent
1639 * fragmented frames. This is in contrast to Draft 4.0.
1640 */
1641 hdrspace = ieee80211_hdrspace(ic, wh);
1642 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1643 m = ieee80211_defrag(ni, m, hdrspace, 0);
1644 if (m == NULL) {
1645 /* Fragment dropped or frame not complete yet */
1646 goto out;
1647 }
1648 }
1649 wh = mtod(m, struct ieee80211_frame *); /* NB: after defrag */
1650
1651 /*
1652 * Now we have a complete Mesh Data frame.
1653 */
1654
1655 /*
1656 * Only fromDStoDS data frames use 4 address qos frames
1657 * as specified in amendment. Otherwise addr4 is located
1658 * in the Mesh Control field and a 3 address qos frame
1659 * is used.
1660 */
1661 *(uint16_t *)qos = *(uint16_t *)ieee80211_getqos(wh);
1662
1663 /*
1664 * NB: The mesh STA sets the Mesh Control Present
1665 * subfield to 1 in the Mesh Data frame containing
1666 * an unfragmented MSDU, an A-MSDU, or the first
1667 * fragment of an MSDU.
1668 * After defrag it should always be present.
1669 */
1670 if (!(qos[1] & IEEE80211_QOS_MC)) {
1671 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
1672 ni->ni_macaddr, NULL,
1673 "%s", "Mesh control field not present");
1674 vap->iv_stats.is_rx_elem_missing++; /* XXX: kinda */
1675 goto err;
1676 }
1677
1678 /* pull up enough to get to the mesh control */
1679 if (m->m_len < hdrspace + sizeof(struct ieee80211_meshcntl) &&
1680 (m = m_pullup(m, hdrspace +
1681 sizeof(struct ieee80211_meshcntl))) == NULL) {
1682 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1683 ni->ni_macaddr, NULL,
1684 "data too short: expecting %u", hdrspace);
1685 vap->iv_stats.is_rx_tooshort++;
1686 goto out; /* XXX */
1687 }
1688 /*
1689 * Now calculate the full extent of the headers. Note
1690 * mesh_decap will pull up anything we didn't get
1691 * above when it strips the 802.11 headers.
1692 */
1693 mc = (const struct ieee80211_meshcntl *)
1694 (mtod(m, const uint8_t *) + hdrspace);
1695 ae = mc->mc_flags & IEEE80211_MESH_AE_MASK;
1696 meshdrlen = sizeof(struct ieee80211_meshcntl) +
1697 ae * IEEE80211_ADDR_LEN;
1698 hdrspace += meshdrlen;
1699
1700 /* pull complete hdrspace = ieee80211_hdrspace + meshcontrol */
1701 if ((meshdrlen > sizeof(struct ieee80211_meshcntl)) &&
1702 (m->m_len < hdrspace) &&
1703 ((m = m_pullup(m, hdrspace)) == NULL)) {
1704 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1705 ni->ni_macaddr, NULL,
1706 "data too short: expecting %u", hdrspace);
1707 vap->iv_stats.is_rx_tooshort++;
1708 goto out; /* XXX */
1709 }
1710 /* XXX: are we sure there is no reallocating after m_pullup? */
1711
1712 seq = le32dec(mc->mc_seq);
1713 if (IEEE80211_IS_MULTICAST(wh->i_addr1))
1714 addr = wh->i_addr3;
1715 else if (ae == IEEE80211_MESH_AE_01)
1716 addr = MC01(mc)->mc_addr4;
1717 else
1718 addr = ((struct ieee80211_qosframe_addr4 *)wh)->i_addr4;
1719 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, addr)) {
1720 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
1721 addr, "data", "%s", "not to me");
1722 vap->iv_stats.is_rx_wrongbss++; /* XXX kinda */
1723 goto out;
1724 }
1725 if (mesh_checkpseq(vap, addr, seq) != 0) {
1726 vap->iv_stats.is_rx_dup++;
1727 goto out;
1728 }
1729
1730 /* This code "routes" the frame to the right control path */
1731 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1732 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr3))
1733 error =
1734 mesh_recv_indiv_data_to_me(vap, m, wh, mc);
1735 else if (IEEE80211_IS_MULTICAST(wh->i_addr3))
1736 error = mesh_recv_group_data(vap, m, wh, mc);
1737 else
1738 error = mesh_recv_indiv_data_to_fwrd(vap, m,
1739 wh, mc);
1740 } else
1741 error = mesh_recv_group_data(vap, m, wh, mc);
1742 if (error < 0)
1743 goto err;
1744 else if (error > 0)
1745 goto out;
1746
1747 if (ieee80211_radiotap_active_vap(vap))
1748 ieee80211_radiotap_rx(vap, m);
1749 need_tap = 0;
1750
1751 /*
1752 * Finally, strip the 802.11 header.
1753 */
1754 m = mesh_decap(vap, m, hdrspace, meshdrlen);
1755 if (m == NULL) {
1756 /* XXX mask bit to check for both */
1757 /* don't count Null data frames as errors */
1758 if (subtype == IEEE80211_FC0_SUBTYPE_NODATA ||
1759 subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL)
1760 goto out;
1761 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
1762 ni->ni_macaddr, "data", "%s", "decap error");
1763 vap->iv_stats.is_rx_decap++;
1764 IEEE80211_NODE_STAT(ni, rx_decap);
1765 goto err;
1766 }
1767 if (qos[0] & IEEE80211_QOS_AMSDU) {
1768 m = ieee80211_decap_amsdu(ni, m);
1769 if (m == NULL)
1770 return IEEE80211_FC0_TYPE_DATA;
1771 }
1772 ieee80211_deliver_data(vap, ni, m);
1773 return type;
1774 case IEEE80211_FC0_TYPE_MGT:
1775 vap->iv_stats.is_rx_mgmt++;
1776 IEEE80211_NODE_STAT(ni, rx_mgmt);
1777 if (dir != IEEE80211_FC1_DIR_NODS) {
1778 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1779 wh, "mgt", "incorrect dir 0x%x", dir);
1780 vap->iv_stats.is_rx_wrongdir++;
1781 goto err;
1782 }
1783 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) {
1784 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1785 ni->ni_macaddr, "mgt", "too short: len %u",
1786 m->m_pkthdr.len);
1787 vap->iv_stats.is_rx_tooshort++;
1788 goto out;
1789 }
1790 #ifdef IEEE80211_DEBUG
1791 if ((ieee80211_msg_debug(vap) &&
1792 (vap->iv_ic->ic_flags & IEEE80211_F_SCAN)) ||
1793 ieee80211_msg_dumppkts(vap)) {
1794 if_printf(ifp, "received %s from %s rssi %d\n",
1795 ieee80211_mgt_subtype_name(subtype),
1796 ether_sprintf(wh->i_addr2), rssi);
1797 }
1798 #endif
1799 if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) {
1800 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1801 wh, NULL, "%s", "WEP set but not permitted");
1802 vap->iv_stats.is_rx_mgtdiscard++; /* XXX */
1803 goto out;
1804 }
1805 vap->iv_recv_mgmt(ni, m, subtype, rxs, rssi, nf);
1806 goto out;
1807 case IEEE80211_FC0_TYPE_CTL:
1808 vap->iv_stats.is_rx_ctl++;
1809 IEEE80211_NODE_STAT(ni, rx_ctrl);
1810 goto out;
1811 default:
1812 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1813 wh, "bad", "frame type 0x%x", type);
1814 /* should not come here */
1815 break;
1816 }
1817 err:
1818 if_inc_counter(ifp, IFCOUNTER_IERRORS, 1);
1819 out:
1820 if (m != NULL) {
1821 if (need_tap && ieee80211_radiotap_active_vap(vap))
1822 ieee80211_radiotap_rx(vap, m);
1823 m_freem(m);
1824 }
1825 return type;
1826 #undef HAS_SEQ
1827 #undef MC01
1828 }
1829
1830 static void
mesh_recv_mgmt(struct ieee80211_node * ni,struct mbuf * m0,int subtype,const struct ieee80211_rx_stats * rxs,int rssi,int nf)1831 mesh_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, int subtype,
1832 const struct ieee80211_rx_stats *rxs, int rssi, int nf)
1833 {
1834 struct ieee80211vap *vap = ni->ni_vap;
1835 struct ieee80211_mesh_state *ms = vap->iv_mesh;
1836 struct ieee80211com *ic = ni->ni_ic;
1837 struct ieee80211_channel *rxchan = ic->ic_curchan;
1838 struct ieee80211_frame *wh;
1839 struct ieee80211_mesh_route *rt;
1840 uint8_t *frm, *efrm;
1841
1842 wh = mtod(m0, struct ieee80211_frame *);
1843 frm = (uint8_t *)&wh[1];
1844 efrm = mtod(m0, uint8_t *) + m0->m_len;
1845 switch (subtype) {
1846 case IEEE80211_FC0_SUBTYPE_PROBE_RESP:
1847 case IEEE80211_FC0_SUBTYPE_BEACON:
1848 {
1849 struct ieee80211_scanparams scan;
1850 struct ieee80211_channel *c;
1851 /*
1852 * We process beacon/probe response
1853 * frames to discover neighbors.
1854 */
1855 if (rxs != NULL) {
1856 c = ieee80211_lookup_channel_rxstatus(vap, rxs);
1857 if (c != NULL)
1858 rxchan = c;
1859 }
1860 if (ieee80211_parse_beacon(ni, m0, rxchan, &scan) != 0)
1861 return;
1862 /*
1863 * Count frame now that we know it's to be processed.
1864 */
1865 if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) {
1866 vap->iv_stats.is_rx_beacon++; /* XXX remove */
1867 IEEE80211_NODE_STAT(ni, rx_beacons);
1868 } else
1869 IEEE80211_NODE_STAT(ni, rx_proberesp);
1870 /*
1871 * If scanning, just pass information to the scan module.
1872 */
1873 if (ic->ic_flags & IEEE80211_F_SCAN) {
1874 if (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN) {
1875 /*
1876 * Actively scanning a channel marked passive;
1877 * send a probe request now that we know there
1878 * is 802.11 traffic present.
1879 *
1880 * XXX check if the beacon we recv'd gives
1881 * us what we need and suppress the probe req
1882 */
1883 ieee80211_probe_curchan(vap, 1);
1884 ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN;
1885 }
1886 ieee80211_add_scan(vap, rxchan, &scan, wh,
1887 subtype, rssi, nf);
1888 return;
1889 }
1890
1891 /* The rest of this code assumes we are running */
1892 if (vap->iv_state != IEEE80211_S_RUN)
1893 return;
1894 /*
1895 * Ignore non-mesh STAs.
1896 */
1897 if ((scan.capinfo &
1898 (IEEE80211_CAPINFO_ESS|IEEE80211_CAPINFO_IBSS)) ||
1899 scan.meshid == NULL || scan.meshconf == NULL) {
1900 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1901 wh, "beacon", "%s", "not a mesh sta");
1902 vap->iv_stats.is_mesh_wrongmesh++;
1903 return;
1904 }
1905 /*
1906 * Ignore STAs for other mesh networks.
1907 */
1908 if (memcmp(scan.meshid+2, ms->ms_id, ms->ms_idlen) != 0 ||
1909 mesh_verify_meshconf(vap, scan.meshconf)) {
1910 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1911 wh, "beacon", "%s", "not for our mesh");
1912 vap->iv_stats.is_mesh_wrongmesh++;
1913 return;
1914 }
1915 /*
1916 * Peer only based on the current ACL policy.
1917 */
1918 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) {
1919 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL,
1920 wh, NULL, "%s", "disallowed by ACL");
1921 vap->iv_stats.is_rx_acl++;
1922 return;
1923 }
1924 /*
1925 * Do neighbor discovery.
1926 */
1927 if (!IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_macaddr)) {
1928 /*
1929 * Create a new entry in the neighbor table.
1930 */
1931 ni = ieee80211_add_neighbor(vap, wh, &scan);
1932 }
1933 /*
1934 * Automatically peer with discovered nodes if possible.
1935 */
1936 if (ni != vap->iv_bss &&
1937 (ms->ms_flags & IEEE80211_MESHFLAGS_AP)) {
1938 switch (ni->ni_mlstate) {
1939 case IEEE80211_NODE_MESH_IDLE:
1940 {
1941 uint16_t args[1];
1942
1943 /* Wait for backoff callout to reset counter */
1944 if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding)
1945 return;
1946
1947 ni->ni_mlpid = mesh_generateid(vap);
1948 if (ni->ni_mlpid == 0)
1949 return;
1950 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENSNT);
1951 args[0] = ni->ni_mlpid;
1952 ieee80211_send_action(ni,
1953 IEEE80211_ACTION_CAT_SELF_PROT,
1954 IEEE80211_ACTION_MESHPEERING_OPEN, args);
1955 ni->ni_mlrcnt = 0;
1956 mesh_peer_timeout_setup(ni);
1957 break;
1958 }
1959 case IEEE80211_NODE_MESH_ESTABLISHED:
1960 {
1961 /*
1962 * Valid beacon from a peer mesh STA
1963 * bump TA lifetime
1964 */
1965 rt = ieee80211_mesh_rt_find(vap, wh->i_addr2);
1966 if(rt != NULL) {
1967 ieee80211_mesh_rt_update(rt,
1968 ticks_to_msecs(
1969 ms->ms_ppath->mpp_inact));
1970 }
1971 break;
1972 }
1973 default:
1974 break; /* ignore */
1975 }
1976 }
1977 break;
1978 }
1979 case IEEE80211_FC0_SUBTYPE_PROBE_REQ:
1980 {
1981 uint8_t *ssid, *meshid, *rates, *xrates;
1982
1983 if (vap->iv_state != IEEE80211_S_RUN) {
1984 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1985 wh, NULL, "wrong state %s",
1986 ieee80211_state_name[vap->iv_state]);
1987 vap->iv_stats.is_rx_mgtdiscard++;
1988 return;
1989 }
1990 if (IEEE80211_IS_MULTICAST(wh->i_addr2)) {
1991 /* frame must be directed */
1992 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1993 wh, NULL, "%s", "not unicast");
1994 vap->iv_stats.is_rx_mgtdiscard++; /* XXX stat */
1995 return;
1996 }
1997 /*
1998 * prreq frame format
1999 * [tlv] ssid
2000 * [tlv] supported rates
2001 * [tlv] extended supported rates
2002 * [tlv] mesh id
2003 */
2004 ssid = meshid = rates = xrates = NULL;
2005 while (efrm - frm > 1) {
2006 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return);
2007 switch (*frm) {
2008 case IEEE80211_ELEMID_SSID:
2009 ssid = frm;
2010 break;
2011 case IEEE80211_ELEMID_RATES:
2012 rates = frm;
2013 break;
2014 case IEEE80211_ELEMID_XRATES:
2015 xrates = frm;
2016 break;
2017 case IEEE80211_ELEMID_MESHID:
2018 meshid = frm;
2019 break;
2020 }
2021 frm += frm[1] + 2;
2022 }
2023 IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return);
2024 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return);
2025 if (xrates != NULL)
2026 IEEE80211_VERIFY_ELEMENT(xrates,
2027 IEEE80211_RATE_MAXSIZE - rates[1], return);
2028 if (meshid != NULL) {
2029 IEEE80211_VERIFY_ELEMENT(meshid,
2030 IEEE80211_MESHID_LEN, return);
2031 /* NB: meshid, not ssid */
2032 IEEE80211_VERIFY_SSID(vap->iv_bss, meshid, return);
2033 }
2034
2035 /* XXX find a better class or define it's own */
2036 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_INPUT, wh->i_addr2,
2037 "%s", "recv probe req");
2038 /*
2039 * Some legacy 11b clients cannot hack a complete
2040 * probe response frame. When the request includes
2041 * only a bare-bones rate set, communicate this to
2042 * the transmit side.
2043 */
2044 ieee80211_send_proberesp(vap, wh->i_addr2, 0);
2045 break;
2046 }
2047
2048 case IEEE80211_FC0_SUBTYPE_ACTION:
2049 case IEEE80211_FC0_SUBTYPE_ACTION_NOACK:
2050 if (ni == vap->iv_bss) {
2051 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2052 wh, NULL, "%s", "unknown node");
2053 vap->iv_stats.is_rx_mgtdiscard++;
2054 } else if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) &&
2055 !IEEE80211_IS_MULTICAST(wh->i_addr1)) {
2056 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2057 wh, NULL, "%s", "not for us");
2058 vap->iv_stats.is_rx_mgtdiscard++;
2059 } else if (vap->iv_state != IEEE80211_S_RUN) {
2060 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2061 wh, NULL, "wrong state %s",
2062 ieee80211_state_name[vap->iv_state]);
2063 vap->iv_stats.is_rx_mgtdiscard++;
2064 } else {
2065 if (ieee80211_parse_action(ni, m0) == 0)
2066 (void)ic->ic_recv_action(ni, wh, frm, efrm);
2067 }
2068 break;
2069
2070 case IEEE80211_FC0_SUBTYPE_ASSOC_REQ:
2071 case IEEE80211_FC0_SUBTYPE_ASSOC_RESP:
2072 case IEEE80211_FC0_SUBTYPE_REASSOC_REQ:
2073 case IEEE80211_FC0_SUBTYPE_REASSOC_RESP:
2074 case IEEE80211_FC0_SUBTYPE_TIMING_ADV:
2075 case IEEE80211_FC0_SUBTYPE_ATIM:
2076 case IEEE80211_FC0_SUBTYPE_DISASSOC:
2077 case IEEE80211_FC0_SUBTYPE_AUTH:
2078 case IEEE80211_FC0_SUBTYPE_DEAUTH:
2079 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2080 wh, NULL, "%s", "not handled");
2081 vap->iv_stats.is_rx_mgtdiscard++;
2082 break;
2083
2084 default:
2085 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
2086 wh, "mgt", "subtype 0x%x not handled", subtype);
2087 vap->iv_stats.is_rx_badsubtype++;
2088 break;
2089 }
2090 }
2091
2092 static void
mesh_recv_ctl(struct ieee80211_node * ni,struct mbuf * m,int subtype)2093 mesh_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype)
2094 {
2095
2096 switch (subtype) {
2097 case IEEE80211_FC0_SUBTYPE_BAR:
2098 ieee80211_recv_bar(ni, m);
2099 break;
2100 }
2101 }
2102
2103 /*
2104 * Parse meshpeering action ie's for MPM frames
2105 */
2106 static const struct ieee80211_meshpeer_ie *
mesh_parse_meshpeering_action(struct ieee80211_node * ni,const struct ieee80211_frame * wh,const uint8_t * frm,const uint8_t * efrm,struct ieee80211_meshpeer_ie * mp,uint8_t subtype)2107 mesh_parse_meshpeering_action(struct ieee80211_node *ni,
2108 const struct ieee80211_frame *wh, /* XXX for VERIFY_LENGTH */
2109 const uint8_t *frm, const uint8_t *efrm,
2110 struct ieee80211_meshpeer_ie *mp, uint8_t subtype)
2111 {
2112 struct ieee80211vap *vap = ni->ni_vap;
2113 const struct ieee80211_meshpeer_ie *mpie;
2114 uint16_t args[3];
2115 const uint8_t *meshid, *meshconf;
2116 uint8_t sendclose = 0; /* 1 = MPM frame rejected, close will be sent */
2117
2118 meshid = meshconf = NULL;
2119 while (efrm - frm > 1) {
2120 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return NULL);
2121 switch (*frm) {
2122 case IEEE80211_ELEMID_MESHID:
2123 meshid = frm;
2124 break;
2125 case IEEE80211_ELEMID_MESHCONF:
2126 meshconf = frm;
2127 break;
2128 case IEEE80211_ELEMID_MESHPEER:
2129 mpie = (const struct ieee80211_meshpeer_ie *) frm;
2130 memset(mp, 0, sizeof(*mp));
2131 mp->peer_len = mpie->peer_len;
2132 mp->peer_proto = le16dec(&mpie->peer_proto);
2133 mp->peer_llinkid = le16dec(&mpie->peer_llinkid);
2134 switch (subtype) {
2135 case IEEE80211_ACTION_MESHPEERING_CONFIRM:
2136 mp->peer_linkid =
2137 le16dec(&mpie->peer_linkid);
2138 break;
2139 case IEEE80211_ACTION_MESHPEERING_CLOSE:
2140 /* NB: peer link ID is optional */
2141 if (mpie->peer_len ==
2142 (IEEE80211_MPM_BASE_SZ + 2)) {
2143 mp->peer_linkid = 0;
2144 mp->peer_rcode =
2145 le16dec(&mpie->peer_linkid);
2146 } else {
2147 mp->peer_linkid =
2148 le16dec(&mpie->peer_linkid);
2149 mp->peer_rcode =
2150 le16dec(&mpie->peer_rcode);
2151 }
2152 break;
2153 }
2154 break;
2155 }
2156 frm += frm[1] + 2;
2157 }
2158
2159 /*
2160 * Verify the contents of the frame.
2161 * If it fails validation, close the peer link.
2162 */
2163 if (mesh_verify_meshpeer(vap, subtype, (const uint8_t *)mp)) {
2164 sendclose = 1;
2165 IEEE80211_DISCARD(vap,
2166 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2167 wh, NULL, "%s", "MPM validation failed");
2168 }
2169
2170 /* If meshid is not the same reject any frames type. */
2171 if (sendclose == 0 && mesh_verify_meshid(vap, meshid)) {
2172 sendclose = 1;
2173 IEEE80211_DISCARD(vap,
2174 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2175 wh, NULL, "%s", "not for our mesh");
2176 if (subtype == IEEE80211_ACTION_MESHPEERING_CLOSE) {
2177 /*
2178 * Standard not clear about this, if we dont ignore
2179 * there will be an endless loop between nodes sending
2180 * CLOSE frames between each other with wrong meshid.
2181 * Discard and timers will bring FSM to IDLE state.
2182 */
2183 return NULL;
2184 }
2185 }
2186
2187 /*
2188 * Close frames are accepted if meshid is the same.
2189 * Verify the other two types.
2190 */
2191 if (sendclose == 0 && subtype != IEEE80211_ACTION_MESHPEERING_CLOSE &&
2192 mesh_verify_meshconf(vap, meshconf)) {
2193 sendclose = 1;
2194 IEEE80211_DISCARD(vap,
2195 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2196 wh, NULL, "%s", "configuration mismatch");
2197 }
2198
2199 if (sendclose) {
2200 vap->iv_stats.is_rx_mgtdiscard++;
2201 switch (ni->ni_mlstate) {
2202 case IEEE80211_NODE_MESH_IDLE:
2203 case IEEE80211_NODE_MESH_ESTABLISHED:
2204 case IEEE80211_NODE_MESH_HOLDING:
2205 /* ignore */
2206 break;
2207 case IEEE80211_NODE_MESH_OPENSNT:
2208 case IEEE80211_NODE_MESH_OPENRCV:
2209 case IEEE80211_NODE_MESH_CONFIRMRCV:
2210 args[0] = ni->ni_mlpid;
2211 args[1] = ni->ni_mllid;
2212 /* Reason codes for rejection */
2213 switch (subtype) {
2214 case IEEE80211_ACTION_MESHPEERING_OPEN:
2215 args[2] = IEEE80211_REASON_MESH_CPVIOLATION;
2216 break;
2217 case IEEE80211_ACTION_MESHPEERING_CONFIRM:
2218 args[2] = IEEE80211_REASON_MESH_INCONS_PARAMS;
2219 break;
2220 }
2221 ieee80211_send_action(ni,
2222 IEEE80211_ACTION_CAT_SELF_PROT,
2223 IEEE80211_ACTION_MESHPEERING_CLOSE,
2224 args);
2225 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2226 mesh_peer_timeout_setup(ni);
2227 break;
2228 }
2229 return NULL;
2230 }
2231
2232 return (const struct ieee80211_meshpeer_ie *) mp;
2233 }
2234
2235 static int
mesh_recv_action_meshpeering_open(struct ieee80211_node * ni,const struct ieee80211_frame * wh,const uint8_t * frm,const uint8_t * efrm)2236 mesh_recv_action_meshpeering_open(struct ieee80211_node *ni,
2237 const struct ieee80211_frame *wh,
2238 const uint8_t *frm, const uint8_t *efrm)
2239 {
2240 struct ieee80211vap *vap = ni->ni_vap;
2241 struct ieee80211_mesh_state *ms = vap->iv_mesh;
2242 struct ieee80211_meshpeer_ie ie;
2243 const struct ieee80211_meshpeer_ie *meshpeer;
2244 uint16_t args[3];
2245
2246 /* +2+2 for action + code + capabilites */
2247 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2, efrm, &ie,
2248 IEEE80211_ACTION_MESHPEERING_OPEN);
2249 if (meshpeer == NULL) {
2250 return 0;
2251 }
2252
2253 /* XXX move up */
2254 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2255 "recv PEER OPEN, lid 0x%x", meshpeer->peer_llinkid);
2256
2257 switch (ni->ni_mlstate) {
2258 case IEEE80211_NODE_MESH_IDLE:
2259 /* Reject open request if reached our maximum neighbor count */
2260 if (ms->ms_neighbors >= IEEE80211_MESH_MAX_NEIGHBORS) {
2261 args[0] = meshpeer->peer_llinkid;
2262 args[1] = 0;
2263 args[2] = IEEE80211_REASON_MESH_MAX_PEERS;
2264 ieee80211_send_action(ni,
2265 IEEE80211_ACTION_CAT_SELF_PROT,
2266 IEEE80211_ACTION_MESHPEERING_CLOSE,
2267 args);
2268 /* stay in IDLE state */
2269 return (0);
2270 }
2271 /* Open frame accepted */
2272 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV);
2273 ni->ni_mllid = meshpeer->peer_llinkid;
2274 ni->ni_mlpid = mesh_generateid(vap);
2275 if (ni->ni_mlpid == 0)
2276 return 0; /* XXX */
2277 args[0] = ni->ni_mlpid;
2278 /* Announce we're open too... */
2279 ieee80211_send_action(ni,
2280 IEEE80211_ACTION_CAT_SELF_PROT,
2281 IEEE80211_ACTION_MESHPEERING_OPEN, args);
2282 /* ...and confirm the link. */
2283 args[0] = ni->ni_mlpid;
2284 args[1] = ni->ni_mllid;
2285 ieee80211_send_action(ni,
2286 IEEE80211_ACTION_CAT_SELF_PROT,
2287 IEEE80211_ACTION_MESHPEERING_CONFIRM,
2288 args);
2289 mesh_peer_timeout_setup(ni);
2290 break;
2291 case IEEE80211_NODE_MESH_OPENRCV:
2292 /* Wrong Link ID */
2293 if (ni->ni_mllid != meshpeer->peer_llinkid) {
2294 args[0] = ni->ni_mllid;
2295 args[1] = ni->ni_mlpid;
2296 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2297 ieee80211_send_action(ni,
2298 IEEE80211_ACTION_CAT_SELF_PROT,
2299 IEEE80211_ACTION_MESHPEERING_CLOSE,
2300 args);
2301 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2302 mesh_peer_timeout_setup(ni);
2303 break;
2304 }
2305 /* Duplicate open, confirm again. */
2306 args[0] = ni->ni_mlpid;
2307 args[1] = ni->ni_mllid;
2308 ieee80211_send_action(ni,
2309 IEEE80211_ACTION_CAT_SELF_PROT,
2310 IEEE80211_ACTION_MESHPEERING_CONFIRM,
2311 args);
2312 break;
2313 case IEEE80211_NODE_MESH_OPENSNT:
2314 ni->ni_mllid = meshpeer->peer_llinkid;
2315 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV);
2316 args[0] = ni->ni_mlpid;
2317 args[1] = ni->ni_mllid;
2318 ieee80211_send_action(ni,
2319 IEEE80211_ACTION_CAT_SELF_PROT,
2320 IEEE80211_ACTION_MESHPEERING_CONFIRM,
2321 args);
2322 /* NB: don't setup/clear any timeout */
2323 break;
2324 case IEEE80211_NODE_MESH_CONFIRMRCV:
2325 if (ni->ni_mlpid != meshpeer->peer_linkid ||
2326 ni->ni_mllid != meshpeer->peer_llinkid) {
2327 args[0] = ni->ni_mlpid;
2328 args[1] = ni->ni_mllid;
2329 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2330 ieee80211_send_action(ni,
2331 IEEE80211_ACTION_CAT_SELF_PROT,
2332 IEEE80211_ACTION_MESHPEERING_CLOSE,
2333 args);
2334 mesh_linkchange(ni,
2335 IEEE80211_NODE_MESH_HOLDING);
2336 mesh_peer_timeout_setup(ni);
2337 break;
2338 }
2339 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED);
2340 ni->ni_mllid = meshpeer->peer_llinkid;
2341 args[0] = ni->ni_mlpid;
2342 args[1] = ni->ni_mllid;
2343 ieee80211_send_action(ni,
2344 IEEE80211_ACTION_CAT_SELF_PROT,
2345 IEEE80211_ACTION_MESHPEERING_CONFIRM,
2346 args);
2347 mesh_peer_timeout_stop(ni);
2348 break;
2349 case IEEE80211_NODE_MESH_ESTABLISHED:
2350 if (ni->ni_mllid != meshpeer->peer_llinkid) {
2351 args[0] = ni->ni_mllid;
2352 args[1] = ni->ni_mlpid;
2353 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2354 ieee80211_send_action(ni,
2355 IEEE80211_ACTION_CAT_SELF_PROT,
2356 IEEE80211_ACTION_MESHPEERING_CLOSE,
2357 args);
2358 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2359 mesh_peer_timeout_setup(ni);
2360 break;
2361 }
2362 args[0] = ni->ni_mlpid;
2363 args[1] = ni->ni_mllid;
2364 ieee80211_send_action(ni,
2365 IEEE80211_ACTION_CAT_SELF_PROT,
2366 IEEE80211_ACTION_MESHPEERING_CONFIRM,
2367 args);
2368 break;
2369 case IEEE80211_NODE_MESH_HOLDING:
2370 args[0] = ni->ni_mlpid;
2371 args[1] = meshpeer->peer_llinkid;
2372 /* Standard not clear about what the reaason code should be */
2373 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2374 ieee80211_send_action(ni,
2375 IEEE80211_ACTION_CAT_SELF_PROT,
2376 IEEE80211_ACTION_MESHPEERING_CLOSE,
2377 args);
2378 break;
2379 }
2380 return 0;
2381 }
2382
2383 static int
mesh_recv_action_meshpeering_confirm(struct ieee80211_node * ni,const struct ieee80211_frame * wh,const uint8_t * frm,const uint8_t * efrm)2384 mesh_recv_action_meshpeering_confirm(struct ieee80211_node *ni,
2385 const struct ieee80211_frame *wh,
2386 const uint8_t *frm, const uint8_t *efrm)
2387 {
2388 struct ieee80211vap *vap = ni->ni_vap;
2389 struct ieee80211_meshpeer_ie ie;
2390 const struct ieee80211_meshpeer_ie *meshpeer;
2391 uint16_t args[3];
2392
2393 /* +2+2+2+2 for action + code + capabilites + status code + AID */
2394 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2+2+2, efrm, &ie,
2395 IEEE80211_ACTION_MESHPEERING_CONFIRM);
2396 if (meshpeer == NULL) {
2397 return 0;
2398 }
2399
2400 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2401 "recv PEER CONFIRM, local id 0x%x, peer id 0x%x",
2402 meshpeer->peer_llinkid, meshpeer->peer_linkid);
2403
2404 switch (ni->ni_mlstate) {
2405 case IEEE80211_NODE_MESH_OPENRCV:
2406 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED);
2407 mesh_peer_timeout_stop(ni);
2408 break;
2409 case IEEE80211_NODE_MESH_OPENSNT:
2410 mesh_linkchange(ni, IEEE80211_NODE_MESH_CONFIRMRCV);
2411 mesh_peer_timeout_setup(ni);
2412 break;
2413 case IEEE80211_NODE_MESH_HOLDING:
2414 args[0] = ni->ni_mlpid;
2415 args[1] = meshpeer->peer_llinkid;
2416 /* Standard not clear about what the reaason code should be */
2417 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2418 ieee80211_send_action(ni,
2419 IEEE80211_ACTION_CAT_SELF_PROT,
2420 IEEE80211_ACTION_MESHPEERING_CLOSE,
2421 args);
2422 break;
2423 case IEEE80211_NODE_MESH_CONFIRMRCV:
2424 if (ni->ni_mllid != meshpeer->peer_llinkid) {
2425 args[0] = ni->ni_mlpid;
2426 args[1] = ni->ni_mllid;
2427 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2428 ieee80211_send_action(ni,
2429 IEEE80211_ACTION_CAT_SELF_PROT,
2430 IEEE80211_ACTION_MESHPEERING_CLOSE,
2431 args);
2432 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2433 mesh_peer_timeout_setup(ni);
2434 }
2435 break;
2436 default:
2437 IEEE80211_DISCARD(vap,
2438 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2439 wh, NULL, "received confirm in invalid state %d",
2440 ni->ni_mlstate);
2441 vap->iv_stats.is_rx_mgtdiscard++;
2442 break;
2443 }
2444 return 0;
2445 }
2446
2447 static int
mesh_recv_action_meshpeering_close(struct ieee80211_node * ni,const struct ieee80211_frame * wh,const uint8_t * frm,const uint8_t * efrm)2448 mesh_recv_action_meshpeering_close(struct ieee80211_node *ni,
2449 const struct ieee80211_frame *wh,
2450 const uint8_t *frm, const uint8_t *efrm)
2451 {
2452 struct ieee80211_meshpeer_ie ie;
2453 const struct ieee80211_meshpeer_ie *meshpeer;
2454 uint16_t args[3];
2455
2456 /* +2 for action + code */
2457 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2, efrm, &ie,
2458 IEEE80211_ACTION_MESHPEERING_CLOSE);
2459 if (meshpeer == NULL) {
2460 return 0;
2461 }
2462
2463 /*
2464 * XXX: check reason code, for example we could receive
2465 * IEEE80211_REASON_MESH_MAX_PEERS then we should not attempt
2466 * to peer again.
2467 */
2468
2469 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2470 ni, "%s", "recv PEER CLOSE");
2471
2472 switch (ni->ni_mlstate) {
2473 case IEEE80211_NODE_MESH_IDLE:
2474 /* ignore */
2475 break;
2476 case IEEE80211_NODE_MESH_OPENRCV:
2477 case IEEE80211_NODE_MESH_OPENSNT:
2478 case IEEE80211_NODE_MESH_CONFIRMRCV:
2479 case IEEE80211_NODE_MESH_ESTABLISHED:
2480 args[0] = ni->ni_mlpid;
2481 args[1] = ni->ni_mllid;
2482 args[2] = IEEE80211_REASON_MESH_CLOSE_RCVD;
2483 ieee80211_send_action(ni,
2484 IEEE80211_ACTION_CAT_SELF_PROT,
2485 IEEE80211_ACTION_MESHPEERING_CLOSE,
2486 args);
2487 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2488 mesh_peer_timeout_setup(ni);
2489 break;
2490 case IEEE80211_NODE_MESH_HOLDING:
2491 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE);
2492 mesh_peer_timeout_stop(ni);
2493 break;
2494 }
2495 return 0;
2496 }
2497
2498 /*
2499 * Link Metric handling.
2500 */
2501 static int
mesh_recv_action_meshlmetric(struct ieee80211_node * ni,const struct ieee80211_frame * wh,const uint8_t * frm,const uint8_t * efrm)2502 mesh_recv_action_meshlmetric(struct ieee80211_node *ni,
2503 const struct ieee80211_frame *wh,
2504 const uint8_t *frm, const uint8_t *efrm)
2505 {
2506 const struct ieee80211_meshlmetric_ie *ie =
2507 (const struct ieee80211_meshlmetric_ie *)
2508 (frm+2); /* action + code */
2509 struct ieee80211_meshlmetric_ie lm_rep;
2510
2511 if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) {
2512 lm_rep.lm_flags = 0;
2513 lm_rep.lm_metric = mesh_airtime_calc(ni);
2514 ieee80211_send_action(ni,
2515 IEEE80211_ACTION_CAT_MESH,
2516 IEEE80211_ACTION_MESH_LMETRIC,
2517 &lm_rep);
2518 }
2519 /* XXX: else do nothing for now */
2520 return 0;
2521 }
2522
2523 /*
2524 * Parse meshgate action ie's for GANN frames.
2525 * Returns -1 if parsing fails, otherwise 0.
2526 */
2527 static int
mesh_parse_meshgate_action(struct ieee80211_node * ni,const struct ieee80211_frame * wh,struct ieee80211_meshgann_ie * ie,const uint8_t * frm,const uint8_t * efrm)2528 mesh_parse_meshgate_action(struct ieee80211_node *ni,
2529 const struct ieee80211_frame *wh, /* XXX for VERIFY_LENGTH */
2530 struct ieee80211_meshgann_ie *ie, const uint8_t *frm, const uint8_t *efrm)
2531 {
2532 struct ieee80211vap *vap = ni->ni_vap;
2533 const struct ieee80211_meshgann_ie *gannie;
2534
2535 while (efrm - frm > 1) {
2536 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return -1);
2537 switch (*frm) {
2538 case IEEE80211_ELEMID_MESHGANN:
2539 gannie = (const struct ieee80211_meshgann_ie *) frm;
2540 memset(ie, 0, sizeof(*ie));
2541 ie->gann_ie = gannie->gann_ie;
2542 ie->gann_len = gannie->gann_len;
2543 ie->gann_flags = gannie->gann_flags;
2544 ie->gann_hopcount = gannie->gann_hopcount;
2545 ie->gann_ttl = gannie->gann_ttl;
2546 IEEE80211_ADDR_COPY(ie->gann_addr, gannie->gann_addr);
2547 ie->gann_seq = le32dec(&gannie->gann_seq);
2548 ie->gann_interval = le16dec(&gannie->gann_interval);
2549 break;
2550 }
2551 frm += frm[1] + 2;
2552 }
2553
2554 return 0;
2555 }
2556
2557 /*
2558 * Mesh Gate Announcement handling.
2559 */
2560 static int
mesh_recv_action_meshgate(struct ieee80211_node * ni,const struct ieee80211_frame * wh,const uint8_t * frm,const uint8_t * efrm)2561 mesh_recv_action_meshgate(struct ieee80211_node *ni,
2562 const struct ieee80211_frame *wh,
2563 const uint8_t *frm, const uint8_t *efrm)
2564 {
2565 struct ieee80211vap *vap = ni->ni_vap;
2566 struct ieee80211_mesh_state *ms = vap->iv_mesh;
2567 struct ieee80211_mesh_gate_route *gr, *next;
2568 struct ieee80211_mesh_route *rt_gate;
2569 struct ieee80211_meshgann_ie pgann;
2570 struct ieee80211_meshgann_ie ie;
2571 int found = 0;
2572
2573 /* +2 for action + code */
2574 if (mesh_parse_meshgate_action(ni, wh, &ie, frm+2, efrm) != 0) {
2575 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
2576 ni->ni_macaddr, NULL, "%s",
2577 "GANN parsing failed");
2578 vap->iv_stats.is_rx_mgtdiscard++;
2579 return (0);
2580 }
2581
2582 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ie.gann_addr))
2583 return 0;
2584
2585 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ni->ni_macaddr,
2586 "received GANN, meshgate: %6D (seq %u)", ie.gann_addr, ":",
2587 ie.gann_seq);
2588
2589 if (ms == NULL)
2590 return (0);
2591 MESH_RT_LOCK(ms);
2592 TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) {
2593 if (!IEEE80211_ADDR_EQ(gr->gr_addr, ie.gann_addr))
2594 continue;
2595 if (ie.gann_seq <= gr->gr_lastseq) {
2596 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
2597 ni->ni_macaddr, NULL,
2598 "GANN old seqno %u <= %u",
2599 ie.gann_seq, gr->gr_lastseq);
2600 MESH_RT_UNLOCK(ms);
2601 return (0);
2602 }
2603 /* corresponding mesh gate found & GANN accepted */
2604 found = 1;
2605 break;
2606 }
2607 if (found == 0) {
2608 /* this GANN is from a new mesh Gate add it to known table. */
2609 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie.gann_addr,
2610 "stored new GANN information, seq %u.", ie.gann_seq);
2611 gr = IEEE80211_MALLOC(ALIGN(sizeof(struct ieee80211_mesh_gate_route)),
2612 M_80211_MESH_GT_RT,
2613 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
2614 IEEE80211_ADDR_COPY(gr->gr_addr, ie.gann_addr);
2615 TAILQ_INSERT_TAIL(&ms->ms_known_gates, gr, gr_next);
2616 }
2617 gr->gr_lastseq = ie.gann_seq;
2618
2619 /* check if we have a path to this gate */
2620 rt_gate = mesh_rt_find_locked(ms, gr->gr_addr);
2621 if (rt_gate != NULL &&
2622 rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) {
2623 gr->gr_route = rt_gate;
2624 rt_gate->rt_flags |= IEEE80211_MESHRT_FLAGS_GATE;
2625 }
2626
2627 MESH_RT_UNLOCK(ms);
2628
2629 /* popagate only if decremented ttl >= 1 && forwarding is enabled */
2630 if ((ie.gann_ttl - 1) < 1 && !(ms->ms_flags & IEEE80211_MESHFLAGS_FWD))
2631 return 0;
2632 pgann.gann_flags = ie.gann_flags; /* Reserved */
2633 pgann.gann_hopcount = ie.gann_hopcount + 1;
2634 pgann.gann_ttl = ie.gann_ttl - 1;
2635 IEEE80211_ADDR_COPY(pgann.gann_addr, ie.gann_addr);
2636 pgann.gann_seq = ie.gann_seq;
2637 pgann.gann_interval = ie.gann_interval;
2638
2639 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie.gann_addr,
2640 "%s", "propagate GANN");
2641
2642 ieee80211_send_action(vap->iv_bss, IEEE80211_ACTION_CAT_MESH,
2643 IEEE80211_ACTION_MESH_GANN, &pgann);
2644
2645 return 0;
2646 }
2647
2648 static int
mesh_send_action(struct ieee80211_node * ni,const uint8_t sa[IEEE80211_ADDR_LEN],const uint8_t da[IEEE80211_ADDR_LEN],struct mbuf * m)2649 mesh_send_action(struct ieee80211_node *ni,
2650 const uint8_t sa[IEEE80211_ADDR_LEN],
2651 const uint8_t da[IEEE80211_ADDR_LEN],
2652 struct mbuf *m)
2653 {
2654 struct ieee80211vap *vap = ni->ni_vap;
2655 struct ieee80211com *ic = ni->ni_ic;
2656 struct ieee80211_bpf_params params;
2657 int ret;
2658
2659 KASSERT(ni != NULL, ("null node"));
2660
2661 if (vap->iv_state == IEEE80211_S_CAC) {
2662 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT, ni,
2663 "block %s frame in CAC state", "Mesh action");
2664 vap->iv_stats.is_tx_badstate++;
2665 ieee80211_free_node(ni);
2666 m_freem(m);
2667 return EIO; /* XXX */
2668 }
2669
2670 M_PREPEND(m, sizeof(struct ieee80211_frame), IEEE80211_M_NOWAIT);
2671 if (m == NULL) {
2672 ieee80211_free_node(ni);
2673 return ENOMEM;
2674 }
2675
2676 IEEE80211_TX_LOCK(ic);
2677 ieee80211_send_setup(ni, m,
2678 IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_ACTION,
2679 IEEE80211_NONQOS_TID, sa, da, sa);
2680 m->m_flags |= M_ENCAP; /* mark encapsulated */
2681
2682 memset(¶ms, 0, sizeof(params));
2683 params.ibp_pri = WME_AC_VO;
2684 params.ibp_rate0 = ni->ni_txparms->mgmtrate;
2685 if (IEEE80211_IS_MULTICAST(da))
2686 params.ibp_try0 = 1;
2687 else
2688 params.ibp_try0 = ni->ni_txparms->maxretry;
2689 params.ibp_power = ni->ni_txpower;
2690
2691 IEEE80211_NODE_STAT(ni, tx_mgmt);
2692
2693 ret = ieee80211_raw_output(vap, ni, m, ¶ms);
2694 IEEE80211_TX_UNLOCK(ic);
2695 return (ret);
2696 }
2697
2698 #define ADDSHORT(frm, v) do { \
2699 frm[0] = (v) & 0xff; \
2700 frm[1] = (v) >> 8; \
2701 frm += 2; \
2702 } while (0)
2703 #define ADDWORD(frm, v) do { \
2704 frm[0] = (v) & 0xff; \
2705 frm[1] = ((v) >> 8) & 0xff; \
2706 frm[2] = ((v) >> 16) & 0xff; \
2707 frm[3] = ((v) >> 24) & 0xff; \
2708 frm += 4; \
2709 } while (0)
2710
2711 static int
mesh_send_action_meshpeering_open(struct ieee80211_node * ni,int category,int action,void * args0)2712 mesh_send_action_meshpeering_open(struct ieee80211_node *ni,
2713 int category, int action, void *args0)
2714 {
2715 struct ieee80211vap *vap = ni->ni_vap;
2716 struct ieee80211com *ic = ni->ni_ic;
2717 uint16_t *args = args0;
2718 const struct ieee80211_rateset *rs;
2719 struct mbuf *m;
2720 uint8_t *frm;
2721
2722 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2723 "send PEER OPEN action: localid 0x%x", args[0]);
2724
2725 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2726 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2727 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2728 ieee80211_ref_node(ni);
2729
2730 m = ieee80211_getmgtframe(&frm,
2731 ic->ic_headroom + sizeof(struct ieee80211_frame),
2732 sizeof(uint16_t) /* action+category */
2733 + sizeof(uint16_t) /* capabilites */
2734 + 2 + IEEE80211_RATE_SIZE
2735 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
2736 + 2 + IEEE80211_MESHID_LEN
2737 + sizeof(struct ieee80211_meshconf_ie)
2738 + sizeof(struct ieee80211_meshpeer_ie)
2739 );
2740 if (m != NULL) {
2741 /*
2742 * mesh peer open action frame format:
2743 * [1] category
2744 * [1] action
2745 * [2] capabilities
2746 * [tlv] rates
2747 * [tlv] xrates
2748 * [tlv] mesh id
2749 * [tlv] mesh conf
2750 * [tlv] mesh peer link mgmt
2751 */
2752 *frm++ = category;
2753 *frm++ = action;
2754 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan));
2755 rs = ieee80211_get_suprates(ic, ic->ic_curchan);
2756 frm = ieee80211_add_rates(frm, rs);
2757 frm = ieee80211_add_xrates(frm, rs);
2758 frm = ieee80211_add_meshid(frm, vap);
2759 frm = ieee80211_add_meshconf(frm, vap);
2760 frm = ieee80211_add_meshpeer(frm, IEEE80211_ACTION_MESHPEERING_OPEN,
2761 args[0], 0, 0);
2762 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2763 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m);
2764 } else {
2765 vap->iv_stats.is_tx_nobuf++;
2766 ieee80211_free_node(ni);
2767 return ENOMEM;
2768 }
2769 }
2770
2771 static int
mesh_send_action_meshpeering_confirm(struct ieee80211_node * ni,int category,int action,void * args0)2772 mesh_send_action_meshpeering_confirm(struct ieee80211_node *ni,
2773 int category, int action, void *args0)
2774 {
2775 struct ieee80211vap *vap = ni->ni_vap;
2776 struct ieee80211com *ic = ni->ni_ic;
2777 uint16_t *args = args0;
2778 const struct ieee80211_rateset *rs;
2779 struct mbuf *m;
2780 uint8_t *frm;
2781
2782 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2783 "send PEER CONFIRM action: localid 0x%x, peerid 0x%x",
2784 args[0], args[1]);
2785
2786 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2787 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2788 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2789 ieee80211_ref_node(ni);
2790
2791 m = ieee80211_getmgtframe(&frm,
2792 ic->ic_headroom + sizeof(struct ieee80211_frame),
2793 sizeof(uint16_t) /* action+category */
2794 + sizeof(uint16_t) /* capabilites */
2795 + sizeof(uint16_t) /* status code */
2796 + sizeof(uint16_t) /* AID */
2797 + 2 + IEEE80211_RATE_SIZE
2798 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
2799 + 2 + IEEE80211_MESHID_LEN
2800 + sizeof(struct ieee80211_meshconf_ie)
2801 + sizeof(struct ieee80211_meshpeer_ie)
2802 );
2803 if (m != NULL) {
2804 /*
2805 * mesh peer confirm action frame format:
2806 * [1] category
2807 * [1] action
2808 * [2] capabilities
2809 * [2] status code
2810 * [2] association id (peer ID)
2811 * [tlv] rates
2812 * [tlv] xrates
2813 * [tlv] mesh id
2814 * [tlv] mesh conf
2815 * [tlv] mesh peer link mgmt
2816 */
2817 *frm++ = category;
2818 *frm++ = action;
2819 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan));
2820 ADDSHORT(frm, 0); /* status code */
2821 ADDSHORT(frm, args[1]); /* AID */
2822 rs = ieee80211_get_suprates(ic, ic->ic_curchan);
2823 frm = ieee80211_add_rates(frm, rs);
2824 frm = ieee80211_add_xrates(frm, rs);
2825 frm = ieee80211_add_meshid(frm, vap);
2826 frm = ieee80211_add_meshconf(frm, vap);
2827 frm = ieee80211_add_meshpeer(frm,
2828 IEEE80211_ACTION_MESHPEERING_CONFIRM,
2829 args[0], args[1], 0);
2830 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2831 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m);
2832 } else {
2833 vap->iv_stats.is_tx_nobuf++;
2834 ieee80211_free_node(ni);
2835 return ENOMEM;
2836 }
2837 }
2838
2839 static int
mesh_send_action_meshpeering_close(struct ieee80211_node * ni,int category,int action,void * args0)2840 mesh_send_action_meshpeering_close(struct ieee80211_node *ni,
2841 int category, int action, void *args0)
2842 {
2843 struct ieee80211vap *vap = ni->ni_vap;
2844 struct ieee80211com *ic = ni->ni_ic;
2845 uint16_t *args = args0;
2846 struct mbuf *m;
2847 uint8_t *frm;
2848
2849 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2850 "send PEER CLOSE action: localid 0x%x, peerid 0x%x reason %d (%s)",
2851 args[0], args[1], args[2], ieee80211_reason_to_string(args[2]));
2852
2853 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2854 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2855 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2856 ieee80211_ref_node(ni);
2857
2858 m = ieee80211_getmgtframe(&frm,
2859 ic->ic_headroom + sizeof(struct ieee80211_frame),
2860 sizeof(uint16_t) /* action+category */
2861 + sizeof(uint16_t) /* reason code */
2862 + 2 + IEEE80211_MESHID_LEN
2863 + sizeof(struct ieee80211_meshpeer_ie)
2864 );
2865 if (m != NULL) {
2866 /*
2867 * mesh peer close action frame format:
2868 * [1] category
2869 * [1] action
2870 * [tlv] mesh id
2871 * [tlv] mesh peer link mgmt
2872 */
2873 *frm++ = category;
2874 *frm++ = action;
2875 frm = ieee80211_add_meshid(frm, vap);
2876 frm = ieee80211_add_meshpeer(frm,
2877 IEEE80211_ACTION_MESHPEERING_CLOSE,
2878 args[0], args[1], args[2]);
2879 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2880 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m);
2881 } else {
2882 vap->iv_stats.is_tx_nobuf++;
2883 ieee80211_free_node(ni);
2884 return ENOMEM;
2885 }
2886 }
2887
2888 static int
mesh_send_action_meshlmetric(struct ieee80211_node * ni,int category,int action,void * arg0)2889 mesh_send_action_meshlmetric(struct ieee80211_node *ni,
2890 int category, int action, void *arg0)
2891 {
2892 struct ieee80211vap *vap = ni->ni_vap;
2893 struct ieee80211com *ic = ni->ni_ic;
2894 struct ieee80211_meshlmetric_ie *ie = arg0;
2895 struct mbuf *m;
2896 uint8_t *frm;
2897
2898 if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) {
2899 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2900 ni, "%s", "send LINK METRIC REQUEST action");
2901 } else {
2902 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2903 ni, "send LINK METRIC REPLY action: metric 0x%x",
2904 ie->lm_metric);
2905 }
2906 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2907 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2908 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2909 ieee80211_ref_node(ni);
2910
2911 m = ieee80211_getmgtframe(&frm,
2912 ic->ic_headroom + sizeof(struct ieee80211_frame),
2913 sizeof(uint16_t) + /* action+category */
2914 sizeof(struct ieee80211_meshlmetric_ie)
2915 );
2916 if (m != NULL) {
2917 /*
2918 * mesh link metric
2919 * [1] category
2920 * [1] action
2921 * [tlv] mesh link metric
2922 */
2923 *frm++ = category;
2924 *frm++ = action;
2925 frm = ieee80211_add_meshlmetric(frm,
2926 ie->lm_flags, ie->lm_metric);
2927 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2928 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m);
2929 } else {
2930 vap->iv_stats.is_tx_nobuf++;
2931 ieee80211_free_node(ni);
2932 return ENOMEM;
2933 }
2934 }
2935
2936 static int
mesh_send_action_meshgate(struct ieee80211_node * ni,int category,int action,void * arg0)2937 mesh_send_action_meshgate(struct ieee80211_node *ni,
2938 int category, int action, void *arg0)
2939 {
2940 struct ieee80211vap *vap = ni->ni_vap;
2941 struct ieee80211com *ic = ni->ni_ic;
2942 struct ieee80211_meshgann_ie *ie = arg0;
2943 struct mbuf *m;
2944 uint8_t *frm;
2945
2946 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2947 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2948 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2949 ieee80211_ref_node(ni);
2950
2951 m = ieee80211_getmgtframe(&frm,
2952 ic->ic_headroom + sizeof(struct ieee80211_frame),
2953 sizeof(uint16_t) + /* action+category */
2954 IEEE80211_MESHGANN_BASE_SZ
2955 );
2956 if (m != NULL) {
2957 /*
2958 * mesh link metric
2959 * [1] category
2960 * [1] action
2961 * [tlv] mesh gate announcement
2962 */
2963 *frm++ = category;
2964 *frm++ = action;
2965 frm = ieee80211_add_meshgate(frm, ie);
2966 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2967 return mesh_send_action(ni, vap->iv_myaddr, broadcastaddr, m);
2968 } else {
2969 vap->iv_stats.is_tx_nobuf++;
2970 ieee80211_free_node(ni);
2971 return ENOMEM;
2972 }
2973 }
2974
2975 static void
mesh_peer_timeout_setup(struct ieee80211_node * ni)2976 mesh_peer_timeout_setup(struct ieee80211_node *ni)
2977 {
2978 switch (ni->ni_mlstate) {
2979 case IEEE80211_NODE_MESH_HOLDING:
2980 ni->ni_mltval = ieee80211_mesh_holdingtimeout;
2981 break;
2982 case IEEE80211_NODE_MESH_CONFIRMRCV:
2983 ni->ni_mltval = ieee80211_mesh_confirmtimeout;
2984 break;
2985 case IEEE80211_NODE_MESH_IDLE:
2986 ni->ni_mltval = 0;
2987 break;
2988 default:
2989 ni->ni_mltval = ieee80211_mesh_retrytimeout;
2990 break;
2991 }
2992 if (ni->ni_mltval)
2993 callout_reset(&ni->ni_mltimer, ni->ni_mltval,
2994 mesh_peer_timeout_cb, ni);
2995 }
2996
2997 /*
2998 * Same as above but backoffs timer statisically 50%.
2999 */
3000 static void
mesh_peer_timeout_backoff(struct ieee80211_node * ni)3001 mesh_peer_timeout_backoff(struct ieee80211_node *ni)
3002 {
3003 uint32_t r;
3004
3005 r = arc4random();
3006 ni->ni_mltval += r % ni->ni_mltval;
3007 callout_reset(&ni->ni_mltimer, ni->ni_mltval, mesh_peer_timeout_cb,
3008 ni);
3009 }
3010
3011 static __inline void
mesh_peer_timeout_stop(struct ieee80211_node * ni)3012 mesh_peer_timeout_stop(struct ieee80211_node *ni)
3013 {
3014 callout_drain(&ni->ni_mltimer);
3015 }
3016
3017 static void
mesh_peer_backoff_cb(void * arg)3018 mesh_peer_backoff_cb(void *arg)
3019 {
3020 struct ieee80211_node *ni = (struct ieee80211_node *)arg;
3021
3022 /* After backoff timeout, try to peer automatically again. */
3023 ni->ni_mlhcnt = 0;
3024 }
3025
3026 /*
3027 * Mesh Peer Link Management FSM timeout handling.
3028 */
3029 static void
mesh_peer_timeout_cb(void * arg)3030 mesh_peer_timeout_cb(void *arg)
3031 {
3032 struct ieee80211_node *ni = (struct ieee80211_node *)arg;
3033 uint16_t args[3];
3034
3035 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_MESH,
3036 ni, "mesh link timeout, state %d, retry counter %d",
3037 ni->ni_mlstate, ni->ni_mlrcnt);
3038
3039 switch (ni->ni_mlstate) {
3040 case IEEE80211_NODE_MESH_IDLE:
3041 case IEEE80211_NODE_MESH_ESTABLISHED:
3042 break;
3043 case IEEE80211_NODE_MESH_OPENSNT:
3044 case IEEE80211_NODE_MESH_OPENRCV:
3045 if (ni->ni_mlrcnt == ieee80211_mesh_maxretries) {
3046 args[0] = ni->ni_mlpid;
3047 args[2] = IEEE80211_REASON_MESH_MAX_RETRIES;
3048 ieee80211_send_action(ni,
3049 IEEE80211_ACTION_CAT_SELF_PROT,
3050 IEEE80211_ACTION_MESHPEERING_CLOSE, args);
3051 ni->ni_mlrcnt = 0;
3052 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
3053 mesh_peer_timeout_setup(ni);
3054 } else {
3055 args[0] = ni->ni_mlpid;
3056 ieee80211_send_action(ni,
3057 IEEE80211_ACTION_CAT_SELF_PROT,
3058 IEEE80211_ACTION_MESHPEERING_OPEN, args);
3059 ni->ni_mlrcnt++;
3060 mesh_peer_timeout_backoff(ni);
3061 }
3062 break;
3063 case IEEE80211_NODE_MESH_CONFIRMRCV:
3064 args[0] = ni->ni_mlpid;
3065 args[2] = IEEE80211_REASON_MESH_CONFIRM_TIMEOUT;
3066 ieee80211_send_action(ni,
3067 IEEE80211_ACTION_CAT_SELF_PROT,
3068 IEEE80211_ACTION_MESHPEERING_CLOSE, args);
3069 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
3070 mesh_peer_timeout_setup(ni);
3071 break;
3072 case IEEE80211_NODE_MESH_HOLDING:
3073 ni->ni_mlhcnt++;
3074 if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding)
3075 callout_reset(&ni->ni_mlhtimer,
3076 ieee80211_mesh_backofftimeout,
3077 mesh_peer_backoff_cb, ni);
3078 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE);
3079 break;
3080 }
3081 }
3082
3083 static int
mesh_verify_meshid(struct ieee80211vap * vap,const uint8_t * ie)3084 mesh_verify_meshid(struct ieee80211vap *vap, const uint8_t *ie)
3085 {
3086 struct ieee80211_mesh_state *ms = vap->iv_mesh;
3087
3088 if (ie == NULL || ie[1] != ms->ms_idlen)
3089 return 1;
3090 return memcmp(ms->ms_id, ie + 2, ms->ms_idlen);
3091 }
3092
3093 /*
3094 * Check if we are using the same algorithms for this mesh.
3095 */
3096 static int
mesh_verify_meshconf(struct ieee80211vap * vap,const uint8_t * ie)3097 mesh_verify_meshconf(struct ieee80211vap *vap, const uint8_t *ie)
3098 {
3099 const struct ieee80211_meshconf_ie *meshconf =
3100 (const struct ieee80211_meshconf_ie *) ie;
3101 const struct ieee80211_mesh_state *ms = vap->iv_mesh;
3102
3103 if (meshconf == NULL)
3104 return 1;
3105 if (meshconf->conf_pselid != ms->ms_ppath->mpp_ie) {
3106 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3107 "unknown path selection algorithm: 0x%x\n",
3108 meshconf->conf_pselid);
3109 return 1;
3110 }
3111 if (meshconf->conf_pmetid != ms->ms_pmetric->mpm_ie) {
3112 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3113 "unknown path metric algorithm: 0x%x\n",
3114 meshconf->conf_pmetid);
3115 return 1;
3116 }
3117 if (meshconf->conf_ccid != 0) {
3118 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3119 "unknown congestion control algorithm: 0x%x\n",
3120 meshconf->conf_ccid);
3121 return 1;
3122 }
3123 if (meshconf->conf_syncid != IEEE80211_MESHCONF_SYNC_NEIGHOFF) {
3124 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3125 "unknown sync algorithm: 0x%x\n",
3126 meshconf->conf_syncid);
3127 return 1;
3128 }
3129 if (meshconf->conf_authid != 0) {
3130 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3131 "unknown auth auth algorithm: 0x%x\n",
3132 meshconf->conf_pselid);
3133 return 1;
3134 }
3135 /* Not accepting peers */
3136 if (!(meshconf->conf_cap & IEEE80211_MESHCONF_CAP_AP)) {
3137 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3138 "not accepting peers: 0x%x\n", meshconf->conf_cap);
3139 return 1;
3140 }
3141 return 0;
3142 }
3143
3144 static int
mesh_verify_meshpeer(struct ieee80211vap * vap,uint8_t subtype,const uint8_t * ie)3145 mesh_verify_meshpeer(struct ieee80211vap *vap, uint8_t subtype,
3146 const uint8_t *ie)
3147 {
3148 const struct ieee80211_meshpeer_ie *meshpeer =
3149 (const struct ieee80211_meshpeer_ie *) ie;
3150
3151 if (meshpeer == NULL ||
3152 meshpeer->peer_len < IEEE80211_MPM_BASE_SZ ||
3153 meshpeer->peer_len > IEEE80211_MPM_MAX_SZ)
3154 return 1;
3155 if (meshpeer->peer_proto != IEEE80211_MPPID_MPM) {
3156 IEEE80211_DPRINTF(vap,
3157 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
3158 "Only MPM protocol is supported (proto: 0x%02X)",
3159 meshpeer->peer_proto);
3160 return 1;
3161 }
3162 switch (subtype) {
3163 case IEEE80211_ACTION_MESHPEERING_OPEN:
3164 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ)
3165 return 1;
3166 break;
3167 case IEEE80211_ACTION_MESHPEERING_CONFIRM:
3168 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ + 2)
3169 return 1;
3170 break;
3171 case IEEE80211_ACTION_MESHPEERING_CLOSE:
3172 if (meshpeer->peer_len < IEEE80211_MPM_BASE_SZ + 2)
3173 return 1;
3174 if (meshpeer->peer_len == (IEEE80211_MPM_BASE_SZ + 2) &&
3175 meshpeer->peer_linkid != 0)
3176 return 1;
3177 if (meshpeer->peer_rcode == 0)
3178 return 1;
3179 break;
3180 }
3181 return 0;
3182 }
3183
3184 /*
3185 * Add a Mesh ID IE to a frame.
3186 */
3187 uint8_t *
ieee80211_add_meshid(uint8_t * frm,struct ieee80211vap * vap)3188 ieee80211_add_meshid(uint8_t *frm, struct ieee80211vap *vap)
3189 {
3190 struct ieee80211_mesh_state *ms = vap->iv_mesh;
3191
3192 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a mbss vap"));
3193
3194 *frm++ = IEEE80211_ELEMID_MESHID;
3195 *frm++ = ms->ms_idlen;
3196 memcpy(frm, ms->ms_id, ms->ms_idlen);
3197 return frm + ms->ms_idlen;
3198 }
3199
3200 /*
3201 * Add a Mesh Configuration IE to a frame.
3202 * For now just use HWMP routing, Airtime link metric, Null Congestion
3203 * Signaling, Null Sync Protocol and Null Authentication.
3204 */
3205 uint8_t *
ieee80211_add_meshconf(uint8_t * frm,struct ieee80211vap * vap)3206 ieee80211_add_meshconf(uint8_t *frm, struct ieee80211vap *vap)
3207 {
3208 const struct ieee80211_mesh_state *ms = vap->iv_mesh;
3209 uint16_t caps;
3210
3211 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap"));
3212
3213 *frm++ = IEEE80211_ELEMID_MESHCONF;
3214 *frm++ = IEEE80211_MESH_CONF_SZ;
3215 *frm++ = ms->ms_ppath->mpp_ie; /* path selection */
3216 *frm++ = ms->ms_pmetric->mpm_ie; /* link metric */
3217 *frm++ = IEEE80211_MESHCONF_CC_DISABLED;
3218 *frm++ = IEEE80211_MESHCONF_SYNC_NEIGHOFF;
3219 *frm++ = IEEE80211_MESHCONF_AUTH_DISABLED;
3220 /* NB: set the number of neighbors before the rest */
3221 *frm = (ms->ms_neighbors > IEEE80211_MESH_MAX_NEIGHBORS ?
3222 IEEE80211_MESH_MAX_NEIGHBORS : ms->ms_neighbors) << 1;
3223 if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE)
3224 *frm |= IEEE80211_MESHCONF_FORM_GATE;
3225 frm += 1;
3226 caps = 0;
3227 if (ms->ms_flags & IEEE80211_MESHFLAGS_AP)
3228 caps |= IEEE80211_MESHCONF_CAP_AP;
3229 if (ms->ms_flags & IEEE80211_MESHFLAGS_FWD)
3230 caps |= IEEE80211_MESHCONF_CAP_FWRD;
3231 *frm++ = caps;
3232 return frm;
3233 }
3234
3235 /*
3236 * Add a Mesh Peer Management IE to a frame.
3237 */
3238 uint8_t *
ieee80211_add_meshpeer(uint8_t * frm,uint8_t subtype,uint16_t localid,uint16_t peerid,uint16_t reason)3239 ieee80211_add_meshpeer(uint8_t *frm, uint8_t subtype, uint16_t localid,
3240 uint16_t peerid, uint16_t reason)
3241 {
3242
3243 KASSERT(localid != 0, ("localid == 0"));
3244
3245 *frm++ = IEEE80211_ELEMID_MESHPEER;
3246 switch (subtype) {
3247 case IEEE80211_ACTION_MESHPEERING_OPEN:
3248 *frm++ = IEEE80211_MPM_BASE_SZ; /* length */
3249 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */
3250 ADDSHORT(frm, localid); /* local ID */
3251 break;
3252 case IEEE80211_ACTION_MESHPEERING_CONFIRM:
3253 KASSERT(peerid != 0, ("sending peer confirm without peer id"));
3254 *frm++ = IEEE80211_MPM_BASE_SZ + 2; /* length */
3255 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */
3256 ADDSHORT(frm, localid); /* local ID */
3257 ADDSHORT(frm, peerid); /* peer ID */
3258 break;
3259 case IEEE80211_ACTION_MESHPEERING_CLOSE:
3260 if (peerid)
3261 *frm++ = IEEE80211_MPM_MAX_SZ; /* length */
3262 else
3263 *frm++ = IEEE80211_MPM_BASE_SZ + 2; /* length */
3264 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */
3265 ADDSHORT(frm, localid); /* local ID */
3266 if (peerid)
3267 ADDSHORT(frm, peerid); /* peer ID */
3268 ADDSHORT(frm, reason);
3269 break;
3270 }
3271 return frm;
3272 }
3273
3274 /*
3275 * Compute an Airtime Link Metric for the link with this node.
3276 *
3277 * Based on Draft 3.0 spec (11B.10, p.149).
3278 */
3279 /*
3280 * Max 802.11s overhead.
3281 */
3282 #define IEEE80211_MESH_MAXOVERHEAD \
3283 (sizeof(struct ieee80211_qosframe_addr4) \
3284 + sizeof(struct ieee80211_meshcntl_ae10) \
3285 + sizeof(struct llc) \
3286 + IEEE80211_ADDR_LEN \
3287 + IEEE80211_WEP_IVLEN \
3288 + IEEE80211_WEP_KIDLEN \
3289 + IEEE80211_WEP_CRCLEN \
3290 + IEEE80211_WEP_MICLEN \
3291 + IEEE80211_CRC_LEN)
3292 uint32_t
mesh_airtime_calc(struct ieee80211_node * ni)3293 mesh_airtime_calc(struct ieee80211_node *ni)
3294 {
3295 #define M_BITS 8
3296 #define S_FACTOR (2 * M_BITS)
3297 struct ieee80211com *ic = ni->ni_ic;
3298 struct ifnet *ifp = ni->ni_vap->iv_ifp;
3299 const static int nbits = 8192 << M_BITS;
3300 uint32_t overhead, rate, errrate;
3301 uint64_t res;
3302
3303 /* Time to transmit a frame */
3304 rate = ni->ni_txrate;
3305 overhead = ieee80211_compute_duration(ic->ic_rt,
3306 ifp->if_mtu + IEEE80211_MESH_MAXOVERHEAD, rate, 0) << M_BITS;
3307 /* Error rate in percentage */
3308 /* XXX assuming small failures are ok */
3309 errrate = (((ifp->if_get_counter(ifp, IFCOUNTER_OERRORS) +
3310 ifp->if_get_counter(ifp, IFCOUNTER_IERRORS)) / 100) << M_BITS)
3311 / 100;
3312 res = (overhead + (nbits / rate)) *
3313 ((1 << S_FACTOR) / ((1 << M_BITS) - errrate));
3314
3315 return (uint32_t)(res >> S_FACTOR);
3316 #undef M_BITS
3317 #undef S_FACTOR
3318 }
3319
3320 /*
3321 * Add a Mesh Link Metric report IE to a frame.
3322 */
3323 uint8_t *
ieee80211_add_meshlmetric(uint8_t * frm,uint8_t flags,uint32_t metric)3324 ieee80211_add_meshlmetric(uint8_t *frm, uint8_t flags, uint32_t metric)
3325 {
3326 *frm++ = IEEE80211_ELEMID_MESHLINK;
3327 *frm++ = 5;
3328 *frm++ = flags;
3329 ADDWORD(frm, metric);
3330 return frm;
3331 }
3332
3333 /*
3334 * Add a Mesh Gate Announcement IE to a frame.
3335 */
3336 uint8_t *
ieee80211_add_meshgate(uint8_t * frm,struct ieee80211_meshgann_ie * ie)3337 ieee80211_add_meshgate(uint8_t *frm, struct ieee80211_meshgann_ie *ie)
3338 {
3339 *frm++ = IEEE80211_ELEMID_MESHGANN; /* ie */
3340 *frm++ = IEEE80211_MESHGANN_BASE_SZ; /* len */
3341 *frm++ = ie->gann_flags;
3342 *frm++ = ie->gann_hopcount;
3343 *frm++ = ie->gann_ttl;
3344 IEEE80211_ADDR_COPY(frm, ie->gann_addr);
3345 frm += 6;
3346 ADDWORD(frm, ie->gann_seq);
3347 ADDSHORT(frm, ie->gann_interval);
3348 return frm;
3349 }
3350 #undef ADDSHORT
3351 #undef ADDWORD
3352
3353 /*
3354 * Initialize any mesh-specific node state.
3355 */
3356 void
ieee80211_mesh_node_init(struct ieee80211vap * vap,struct ieee80211_node * ni)3357 ieee80211_mesh_node_init(struct ieee80211vap *vap, struct ieee80211_node *ni)
3358 {
3359 ni->ni_flags |= IEEE80211_NODE_QOS;
3360 callout_init(&ni->ni_mltimer, 1);
3361 callout_init(&ni->ni_mlhtimer, 1);
3362 }
3363
3364 /*
3365 * Cleanup any mesh-specific node state.
3366 */
3367 void
ieee80211_mesh_node_cleanup(struct ieee80211_node * ni)3368 ieee80211_mesh_node_cleanup(struct ieee80211_node *ni)
3369 {
3370 struct ieee80211vap *vap = ni->ni_vap;
3371 struct ieee80211_mesh_state *ms = vap->iv_mesh;
3372
3373 callout_drain(&ni->ni_mltimer);
3374 callout_drain(&ni->ni_mlhtimer);
3375 /* NB: short-circuit callbacks after mesh_vdetach */
3376 if (vap->iv_mesh != NULL)
3377 ms->ms_ppath->mpp_peerdown(ni);
3378 }
3379
3380 void
ieee80211_parse_meshid(struct ieee80211_node * ni,const uint8_t * ie)3381 ieee80211_parse_meshid(struct ieee80211_node *ni, const uint8_t *ie)
3382 {
3383 ni->ni_meshidlen = ie[1];
3384 memcpy(ni->ni_meshid, ie + 2, ie[1]);
3385 }
3386
3387 /*
3388 * Setup mesh-specific node state on neighbor discovery.
3389 */
3390 void
ieee80211_mesh_init_neighbor(struct ieee80211_node * ni,const struct ieee80211_frame * wh,const struct ieee80211_scanparams * sp)3391 ieee80211_mesh_init_neighbor(struct ieee80211_node *ni,
3392 const struct ieee80211_frame *wh,
3393 const struct ieee80211_scanparams *sp)
3394 {
3395 ieee80211_parse_meshid(ni, sp->meshid);
3396 }
3397
3398 void
ieee80211_mesh_update_beacon(struct ieee80211vap * vap,struct ieee80211_beacon_offsets * bo)3399 ieee80211_mesh_update_beacon(struct ieee80211vap *vap,
3400 struct ieee80211_beacon_offsets *bo)
3401 {
3402 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap"));
3403
3404 if (isset(bo->bo_flags, IEEE80211_BEACON_MESHCONF)) {
3405 (void)ieee80211_add_meshconf(bo->bo_meshconf, vap);
3406 clrbit(bo->bo_flags, IEEE80211_BEACON_MESHCONF);
3407 }
3408 }
3409
3410 static int
mesh_ioctl_get80211(struct ieee80211vap * vap,struct ieee80211req * ireq)3411 mesh_ioctl_get80211(struct ieee80211vap *vap, struct ieee80211req *ireq)
3412 {
3413 struct ieee80211_mesh_state *ms = vap->iv_mesh;
3414 uint8_t tmpmeshid[IEEE80211_NWID_LEN];
3415 struct ieee80211_mesh_route *rt;
3416 struct ieee80211req_mesh_route *imr;
3417 size_t len, off;
3418 uint8_t *p;
3419 int error;
3420
3421 if (vap->iv_opmode != IEEE80211_M_MBSS)
3422 return ENOSYS;
3423
3424 error = 0;
3425 switch (ireq->i_type) {
3426 case IEEE80211_IOC_MESH_ID:
3427 ireq->i_len = ms->ms_idlen;
3428 memcpy(tmpmeshid, ms->ms_id, ireq->i_len);
3429 error = copyout(tmpmeshid, ireq->i_data, ireq->i_len);
3430 break;
3431 case IEEE80211_IOC_MESH_AP:
3432 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_AP) != 0;
3433 break;
3434 case IEEE80211_IOC_MESH_FWRD:
3435 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) != 0;
3436 break;
3437 case IEEE80211_IOC_MESH_GATE:
3438 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) != 0;
3439 break;
3440 case IEEE80211_IOC_MESH_TTL:
3441 ireq->i_val = ms->ms_ttl;
3442 break;
3443 case IEEE80211_IOC_MESH_RTCMD:
3444 switch (ireq->i_val) {
3445 case IEEE80211_MESH_RTCMD_LIST:
3446 len = 0;
3447 MESH_RT_LOCK(ms);
3448 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) {
3449 len += sizeof(*imr);
3450 }
3451 MESH_RT_UNLOCK(ms);
3452 if (len > ireq->i_len || ireq->i_len < sizeof(*imr)) {
3453 ireq->i_len = len;
3454 return ENOMEM;
3455 }
3456 ireq->i_len = len;
3457 /* XXX M_WAIT? */
3458 p = IEEE80211_MALLOC(len, M_TEMP,
3459 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
3460 if (p == NULL)
3461 return ENOMEM;
3462 off = 0;
3463 MESH_RT_LOCK(ms);
3464 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) {
3465 if (off >= len)
3466 break;
3467 imr = (struct ieee80211req_mesh_route *)
3468 (p + off);
3469 IEEE80211_ADDR_COPY(imr->imr_dest,
3470 rt->rt_dest);
3471 IEEE80211_ADDR_COPY(imr->imr_nexthop,
3472 rt->rt_nexthop);
3473 imr->imr_metric = rt->rt_metric;
3474 imr->imr_nhops = rt->rt_nhops;
3475 imr->imr_lifetime =
3476 ieee80211_mesh_rt_update(rt, 0);
3477 imr->imr_lastmseq = rt->rt_lastmseq;
3478 imr->imr_flags = rt->rt_flags; /* last */
3479 off += sizeof(*imr);
3480 }
3481 MESH_RT_UNLOCK(ms);
3482 error = copyout(p, (uint8_t *)ireq->i_data,
3483 ireq->i_len);
3484 IEEE80211_FREE(p, M_TEMP);
3485 break;
3486 case IEEE80211_MESH_RTCMD_FLUSH:
3487 case IEEE80211_MESH_RTCMD_ADD:
3488 case IEEE80211_MESH_RTCMD_DELETE:
3489 return EINVAL;
3490 default:
3491 return ENOSYS;
3492 }
3493 break;
3494 case IEEE80211_IOC_MESH_PR_METRIC:
3495 len = strlen(ms->ms_pmetric->mpm_descr);
3496 if (ireq->i_len < len)
3497 return EINVAL;
3498 ireq->i_len = len;
3499 error = copyout(ms->ms_pmetric->mpm_descr,
3500 (uint8_t *)ireq->i_data, len);
3501 break;
3502 case IEEE80211_IOC_MESH_PR_PATH:
3503 len = strlen(ms->ms_ppath->mpp_descr);
3504 if (ireq->i_len < len)
3505 return EINVAL;
3506 ireq->i_len = len;
3507 error = copyout(ms->ms_ppath->mpp_descr,
3508 (uint8_t *)ireq->i_data, len);
3509 break;
3510 default:
3511 return ENOSYS;
3512 }
3513
3514 return error;
3515 }
3516 IEEE80211_IOCTL_GET(mesh, mesh_ioctl_get80211);
3517
3518 static int
mesh_ioctl_set80211(struct ieee80211vap * vap,struct ieee80211req * ireq)3519 mesh_ioctl_set80211(struct ieee80211vap *vap, struct ieee80211req *ireq)
3520 {
3521 struct ieee80211_mesh_state *ms = vap->iv_mesh;
3522 uint8_t tmpmeshid[IEEE80211_NWID_LEN];
3523 uint8_t tmpaddr[IEEE80211_ADDR_LEN];
3524 char tmpproto[IEEE80211_MESH_PROTO_DSZ];
3525 int error;
3526
3527 if (vap->iv_opmode != IEEE80211_M_MBSS)
3528 return ENOSYS;
3529
3530 error = 0;
3531 switch (ireq->i_type) {
3532 case IEEE80211_IOC_MESH_ID:
3533 if (ireq->i_val != 0 || ireq->i_len > IEEE80211_MESHID_LEN)
3534 return EINVAL;
3535 error = copyin(ireq->i_data, tmpmeshid, ireq->i_len);
3536 if (error != 0)
3537 break;
3538 memset(ms->ms_id, 0, IEEE80211_NWID_LEN);
3539 ms->ms_idlen = ireq->i_len;
3540 memcpy(ms->ms_id, tmpmeshid, ireq->i_len);
3541 error = ENETRESET;
3542 break;
3543 case IEEE80211_IOC_MESH_AP:
3544 if (ireq->i_val)
3545 ms->ms_flags |= IEEE80211_MESHFLAGS_AP;
3546 else
3547 ms->ms_flags &= ~IEEE80211_MESHFLAGS_AP;
3548 error = ENETRESET;
3549 break;
3550 case IEEE80211_IOC_MESH_FWRD:
3551 if (ireq->i_val)
3552 ms->ms_flags |= IEEE80211_MESHFLAGS_FWD;
3553 else
3554 ms->ms_flags &= ~IEEE80211_MESHFLAGS_FWD;
3555 mesh_gatemode_setup(vap);
3556 break;
3557 case IEEE80211_IOC_MESH_GATE:
3558 if (ireq->i_val)
3559 ms->ms_flags |= IEEE80211_MESHFLAGS_GATE;
3560 else
3561 ms->ms_flags &= ~IEEE80211_MESHFLAGS_GATE;
3562 break;
3563 case IEEE80211_IOC_MESH_TTL:
3564 ms->ms_ttl = (uint8_t) ireq->i_val;
3565 break;
3566 case IEEE80211_IOC_MESH_RTCMD:
3567 switch (ireq->i_val) {
3568 case IEEE80211_MESH_RTCMD_LIST:
3569 return EINVAL;
3570 case IEEE80211_MESH_RTCMD_FLUSH:
3571 ieee80211_mesh_rt_flush(vap);
3572 break;
3573 case IEEE80211_MESH_RTCMD_ADD:
3574 error = copyin(ireq->i_data, tmpaddr,
3575 IEEE80211_ADDR_LEN);
3576 if (error != 0)
3577 break;
3578 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, tmpaddr) ||
3579 IEEE80211_ADDR_EQ(broadcastaddr, tmpaddr))
3580 return EINVAL;
3581 ieee80211_mesh_discover(vap, tmpaddr, NULL);
3582 break;
3583 case IEEE80211_MESH_RTCMD_DELETE:
3584 error = copyin(ireq->i_data, tmpaddr,
3585 IEEE80211_ADDR_LEN);
3586 if (error != 0)
3587 break;
3588 ieee80211_mesh_rt_del(vap, tmpaddr);
3589 break;
3590 default:
3591 return ENOSYS;
3592 }
3593 break;
3594 case IEEE80211_IOC_MESH_PR_METRIC:
3595 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto));
3596 if (error == 0) {
3597 error = mesh_select_proto_metric(vap, tmpproto);
3598 if (error == 0)
3599 error = ENETRESET;
3600 }
3601 break;
3602 case IEEE80211_IOC_MESH_PR_PATH:
3603 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto));
3604 if (error == 0) {
3605 error = mesh_select_proto_path(vap, tmpproto);
3606 if (error == 0)
3607 error = ENETRESET;
3608 }
3609 break;
3610 default:
3611 return ENOSYS;
3612 }
3613 return error;
3614 }
3615 IEEE80211_IOCTL_SET(mesh, mesh_ioctl_set80211);
3616