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