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(vap->iv_bss,
807 ieee80211_ht_adjust_channel(ic, ic->ic_curchan,
808 ieee80211_htchanflags(vap->iv_bss->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 struct ieee80211_node *ni = vap->iv_bss;
816 ieee80211_note(vap,
817 "synchronized with %s meshid ",
818 ether_sprintf(ni->ni_meshid));
819 ieee80211_print_essid(ni->ni_meshid,
820 ni->ni_meshidlen);
821 /* XXX MCS/HT */
822 printf(" channel %d\n",
823 ieee80211_chan2ieee(ic, ic->ic_curchan));
824 }
825 #endif
826 break;
827 default:
828 break;
829 }
830 ieee80211_node_authorize(vap->iv_bss);
831 callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact,
832 mesh_rt_cleanup_cb, vap);
833 mesh_gatemode_setup(vap);
834 break;
835 default:
836 break;
837 }
838 /* NB: ostate not nstate */
839 ms->ms_ppath->mpp_newstate(vap, ostate, arg);
840 return 0;
841 }
842
843 static void
mesh_rt_cleanup_cb(void * arg)844 mesh_rt_cleanup_cb(void *arg)
845 {
846 struct ieee80211vap *vap = arg;
847 struct ieee80211_mesh_state *ms = vap->iv_mesh;
848
849 mesh_rt_flush_invalid(vap);
850 callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact,
851 mesh_rt_cleanup_cb, vap);
852 }
853
854 /*
855 * Mark a mesh STA as gate and return a pointer to it.
856 * If this is first time, we create a new gate route.
857 * Always update the path route to this mesh gate.
858 */
859 struct ieee80211_mesh_gate_route *
ieee80211_mesh_mark_gate(struct ieee80211vap * vap,const uint8_t * addr,struct ieee80211_mesh_route * rt)860 ieee80211_mesh_mark_gate(struct ieee80211vap *vap, const uint8_t *addr,
861 struct ieee80211_mesh_route *rt)
862 {
863 struct ieee80211_mesh_state *ms = vap->iv_mesh;
864 struct ieee80211_mesh_gate_route *gr = NULL, *next;
865 int found = 0;
866
867 MESH_RT_LOCK(ms);
868 TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) {
869 if (IEEE80211_ADDR_EQ(gr->gr_addr, addr)) {
870 found = 1;
871 break;
872 }
873 }
874
875 if (!found) {
876 /* New mesh gate add it to known table. */
877 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, addr,
878 "%s", "stored new gate information from pro-PREQ.");
879 gr = IEEE80211_MALLOC(ALIGN(sizeof(struct ieee80211_mesh_gate_route)),
880 M_80211_MESH_GT_RT,
881 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
882 IEEE80211_ADDR_COPY(gr->gr_addr, addr);
883 TAILQ_INSERT_TAIL(&ms->ms_known_gates, gr, gr_next);
884 }
885 gr->gr_route = rt;
886 /* TODO: link from path route to gate route */
887 MESH_RT_UNLOCK(ms);
888
889 return gr;
890 }
891
892
893 /*
894 * Helper function to note the Mesh Peer Link FSM change.
895 */
896 static void
mesh_linkchange(struct ieee80211_node * ni,enum ieee80211_mesh_mlstate state)897 mesh_linkchange(struct ieee80211_node *ni, enum ieee80211_mesh_mlstate state)
898 {
899 struct ieee80211vap *vap = ni->ni_vap;
900 struct ieee80211_mesh_state *ms = vap->iv_mesh;
901 #ifdef IEEE80211_DEBUG
902 static const char *meshlinkstates[] = {
903 [IEEE80211_NODE_MESH_IDLE] = "IDLE",
904 [IEEE80211_NODE_MESH_OPENSNT] = "OPEN SENT",
905 [IEEE80211_NODE_MESH_OPENRCV] = "OPEN RECEIVED",
906 [IEEE80211_NODE_MESH_CONFIRMRCV] = "CONFIRM RECEIVED",
907 [IEEE80211_NODE_MESH_ESTABLISHED] = "ESTABLISHED",
908 [IEEE80211_NODE_MESH_HOLDING] = "HOLDING"
909 };
910 #endif
911 IEEE80211_NOTE(vap, IEEE80211_MSG_MESH,
912 ni, "peer link: %s -> %s",
913 meshlinkstates[ni->ni_mlstate], meshlinkstates[state]);
914
915 /* track neighbor count */
916 if (state == IEEE80211_NODE_MESH_ESTABLISHED &&
917 ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) {
918 KASSERT(ms->ms_neighbors < 65535, ("neighbor count overflow"));
919 ms->ms_neighbors++;
920 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF);
921 } else if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED &&
922 state != IEEE80211_NODE_MESH_ESTABLISHED) {
923 KASSERT(ms->ms_neighbors > 0, ("neighbor count 0"));
924 ms->ms_neighbors--;
925 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF);
926 }
927 ni->ni_mlstate = state;
928 switch (state) {
929 case IEEE80211_NODE_MESH_HOLDING:
930 ms->ms_ppath->mpp_peerdown(ni);
931 break;
932 case IEEE80211_NODE_MESH_ESTABLISHED:
933 ieee80211_mesh_discover(vap, ni->ni_macaddr, NULL);
934 break;
935 default:
936 break;
937 }
938 }
939
940 /*
941 * Helper function to generate a unique local ID required for mesh
942 * peer establishment.
943 */
944 static void
mesh_checkid(void * arg,struct ieee80211_node * ni)945 mesh_checkid(void *arg, struct ieee80211_node *ni)
946 {
947 uint16_t *r = arg;
948
949 if (*r == ni->ni_mllid)
950 *(uint16_t *)arg = 0;
951 }
952
953 static uint32_t
mesh_generateid(struct ieee80211vap * vap)954 mesh_generateid(struct ieee80211vap *vap)
955 {
956 int maxiter = 4;
957 uint16_t r;
958
959 do {
960 get_random_bytes(&r, 2);
961 ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_checkid, &r);
962 maxiter--;
963 } while (r == 0 && maxiter > 0);
964 return r;
965 }
966
967 /*
968 * Verifies if we already received this packet by checking its
969 * sequence number.
970 * Returns 0 if the frame is to be accepted, 1 otherwise.
971 */
972 static int
mesh_checkpseq(struct ieee80211vap * vap,const uint8_t source[IEEE80211_ADDR_LEN],uint32_t seq)973 mesh_checkpseq(struct ieee80211vap *vap,
974 const uint8_t source[IEEE80211_ADDR_LEN], uint32_t seq)
975 {
976 struct ieee80211_mesh_route *rt;
977
978 rt = ieee80211_mesh_rt_find(vap, source);
979 if (rt == NULL) {
980 rt = ieee80211_mesh_rt_add(vap, source);
981 if (rt == NULL) {
982 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source,
983 "%s", "add mcast route failed");
984 vap->iv_stats.is_mesh_rtaddfailed++;
985 return 1;
986 }
987 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source,
988 "add mcast route, mesh seqno %d", seq);
989 rt->rt_lastmseq = seq;
990 return 0;
991 }
992 if (IEEE80211_MESH_SEQ_GEQ(rt->rt_lastmseq, seq)) {
993 return 1;
994 } else {
995 rt->rt_lastmseq = seq;
996 return 0;
997 }
998 }
999
1000 /*
1001 * Iterate the routing table and locate the next hop.
1002 */
1003 struct ieee80211_node *
ieee80211_mesh_find_txnode(struct ieee80211vap * vap,const uint8_t dest[IEEE80211_ADDR_LEN])1004 ieee80211_mesh_find_txnode(struct ieee80211vap *vap,
1005 const uint8_t dest[IEEE80211_ADDR_LEN])
1006 {
1007 struct ieee80211_mesh_route *rt;
1008
1009 rt = ieee80211_mesh_rt_find(vap, dest);
1010 if (rt == NULL)
1011 return NULL;
1012 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) {
1013 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
1014 "%s: !valid, flags 0x%x", __func__, rt->rt_flags);
1015 /* XXX stat */
1016 return NULL;
1017 }
1018 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) {
1019 rt = ieee80211_mesh_rt_find(vap, rt->rt_mesh_gate);
1020 if (rt == NULL) return NULL;
1021 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) {
1022 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
1023 "%s: meshgate !valid, flags 0x%x", __func__,
1024 rt->rt_flags);
1025 /* XXX stat */
1026 return NULL;
1027 }
1028 }
1029 return ieee80211_find_txnode(vap, rt->rt_nexthop);
1030 }
1031
1032 static void
mesh_transmit_to_gate(struct ieee80211vap * vap,struct mbuf * m,struct ieee80211_mesh_route * rt_gate)1033 mesh_transmit_to_gate(struct ieee80211vap *vap, struct mbuf *m,
1034 struct ieee80211_mesh_route *rt_gate)
1035 {
1036 struct ifnet *ifp = vap->iv_ifp;
1037 struct ieee80211_node *ni;
1038
1039 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
1040
1041 ni = ieee80211_mesh_find_txnode(vap, rt_gate->rt_dest);
1042 if (ni == NULL) {
1043 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
1044 m_freem(m);
1045 return;
1046 }
1047
1048 /*
1049 * Send through the VAP packet transmit path.
1050 * This consumes the node ref grabbed above and
1051 * the mbuf, regardless of whether there's a problem
1052 * or not.
1053 */
1054 (void) ieee80211_vap_pkt_send_dest(vap, m, ni);
1055 }
1056
1057 /*
1058 * Forward the queued frames to known valid mesh gates.
1059 * Assume destination to be outside the MBSS (i.e. proxy entry),
1060 * If no valid mesh gates are known silently discard queued frames.
1061 * After transmitting frames to all known valid mesh gates, this route
1062 * will be marked invalid, and a new path discovery will happen in the hopes
1063 * that (at least) one of the mesh gates have a new proxy entry for us to use.
1064 */
1065 void
ieee80211_mesh_forward_to_gates(struct ieee80211vap * vap,struct ieee80211_mesh_route * rt_dest)1066 ieee80211_mesh_forward_to_gates(struct ieee80211vap *vap,
1067 struct ieee80211_mesh_route *rt_dest)
1068 {
1069 struct ieee80211com *ic = vap->iv_ic;
1070 struct ieee80211_mesh_state *ms = vap->iv_mesh;
1071 struct ieee80211_mesh_route *rt_gate;
1072 struct ieee80211_mesh_gate_route *gr = NULL, *gr_next;
1073 struct mbuf *m, *mcopy, *next;
1074
1075 IEEE80211_TX_UNLOCK_ASSERT(ic);
1076
1077 KASSERT( rt_dest->rt_flags == IEEE80211_MESHRT_FLAGS_DISCOVER,
1078 ("Route is not marked with IEEE80211_MESHRT_FLAGS_DISCOVER"));
1079
1080 /* XXX: send to more than one valid mash gate */
1081 MESH_RT_LOCK(ms);
1082
1083 m = ieee80211_ageq_remove(&ic->ic_stageq,
1084 (struct ieee80211_node *)(uintptr_t)
1085 ieee80211_mac_hash(ic, rt_dest->rt_dest));
1086
1087 TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, gr_next) {
1088 rt_gate = gr->gr_route;
1089 if (rt_gate == NULL) {
1090 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP,
1091 rt_dest->rt_dest,
1092 "mesh gate with no path %6D",
1093 gr->gr_addr, ":");
1094 continue;
1095 }
1096 if ((rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0)
1097 continue;
1098 KASSERT(rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_GATE,
1099 ("route not marked as a mesh gate"));
1100 KASSERT((rt_gate->rt_flags &
1101 IEEE80211_MESHRT_FLAGS_PROXY) == 0,
1102 ("found mesh gate that is also marked porxy"));
1103 /*
1104 * convert route to a proxy route gated by the current
1105 * mesh gate, this is needed so encap can built data
1106 * frame with correct address.
1107 */
1108 rt_dest->rt_flags = IEEE80211_MESHRT_FLAGS_PROXY |
1109 IEEE80211_MESHRT_FLAGS_VALID;
1110 rt_dest->rt_ext_seq = 1; /* random value */
1111 IEEE80211_ADDR_COPY(rt_dest->rt_mesh_gate, rt_gate->rt_dest);
1112 IEEE80211_ADDR_COPY(rt_dest->rt_nexthop, rt_gate->rt_nexthop);
1113 rt_dest->rt_metric = rt_gate->rt_metric;
1114 rt_dest->rt_nhops = rt_gate->rt_nhops;
1115 ieee80211_mesh_rt_update(rt_dest, ms->ms_ppath->mpp_inact);
1116 MESH_RT_UNLOCK(ms);
1117 /* XXX: lock?? */
1118 mcopy = m_dup(m, M_NOWAIT);
1119 for (; mcopy != NULL; mcopy = next) {
1120 next = mcopy->m_nextpkt;
1121 mcopy->m_nextpkt = NULL;
1122 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP,
1123 rt_dest->rt_dest,
1124 "flush queued frame %p len %d", mcopy,
1125 mcopy->m_pkthdr.len);
1126 mesh_transmit_to_gate(vap, mcopy, rt_gate);
1127 }
1128 MESH_RT_LOCK(ms);
1129 }
1130 rt_dest->rt_flags = 0; /* Mark invalid */
1131 m_freem(m);
1132 MESH_RT_UNLOCK(ms);
1133 }
1134
1135 /*
1136 * Forward the specified frame.
1137 * Decrement the TTL and set TA to our MAC address.
1138 */
1139 static void
mesh_forward(struct ieee80211vap * vap,struct mbuf * m,const struct ieee80211_meshcntl * mc)1140 mesh_forward(struct ieee80211vap *vap, struct mbuf *m,
1141 const struct ieee80211_meshcntl *mc)
1142 {
1143 struct ieee80211com *ic = vap->iv_ic;
1144 struct ieee80211_mesh_state *ms = vap->iv_mesh;
1145 struct ifnet *ifp = vap->iv_ifp;
1146 const struct ieee80211_frame *wh =
1147 mtod(m, const struct ieee80211_frame *);
1148 struct mbuf *mcopy;
1149 struct ieee80211_meshcntl *mccopy;
1150 struct ieee80211_frame *whcopy;
1151 struct ieee80211_node *ni;
1152 int err;
1153
1154 /* This is called from the RX path - don't hold this lock */
1155 IEEE80211_TX_UNLOCK_ASSERT(ic);
1156
1157 /*
1158 * mesh ttl of 1 means we are the last one receving it,
1159 * according to amendment we decrement and then check if
1160 * 0, if so we dont forward.
1161 */
1162 if (mc->mc_ttl < 1) {
1163 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1164 "%s", "frame not fwd'd, ttl 1");
1165 vap->iv_stats.is_mesh_fwd_ttl++;
1166 return;
1167 }
1168 if (!(ms->ms_flags & IEEE80211_MESHFLAGS_FWD)) {
1169 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1170 "%s", "frame not fwd'd, fwding disabled");
1171 vap->iv_stats.is_mesh_fwd_disabled++;
1172 return;
1173 }
1174 mcopy = m_dup(m, M_NOWAIT);
1175 if (mcopy == NULL) {
1176 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1177 "%s", "frame not fwd'd, cannot dup");
1178 vap->iv_stats.is_mesh_fwd_nobuf++;
1179 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
1180 return;
1181 }
1182 mcopy = m_pullup(mcopy, ieee80211_hdrspace(ic, wh) +
1183 sizeof(struct ieee80211_meshcntl));
1184 if (mcopy == NULL) {
1185 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1186 "%s", "frame not fwd'd, too short");
1187 vap->iv_stats.is_mesh_fwd_tooshort++;
1188 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
1189 m_freem(mcopy);
1190 return;
1191 }
1192 whcopy = mtod(mcopy, struct ieee80211_frame *);
1193 mccopy = (struct ieee80211_meshcntl *)
1194 (mtod(mcopy, uint8_t *) + ieee80211_hdrspace(ic, wh));
1195 /* XXX clear other bits? */
1196 whcopy->i_fc[1] &= ~IEEE80211_FC1_RETRY;
1197 IEEE80211_ADDR_COPY(whcopy->i_addr2, vap->iv_myaddr);
1198 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1199 ni = ieee80211_ref_node(vap->iv_bss);
1200 mcopy->m_flags |= M_MCAST;
1201 } else {
1202 ni = ieee80211_mesh_find_txnode(vap, whcopy->i_addr3);
1203 if (ni == NULL) {
1204 /*
1205 * [Optional] any of the following three actions:
1206 * o silently discard
1207 * o trigger a path discovery
1208 * o inform TA that meshDA is unknown.
1209 */
1210 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1211 "%s", "frame not fwd'd, no path");
1212 ms->ms_ppath->mpp_senderror(vap, whcopy->i_addr3, NULL,
1213 IEEE80211_REASON_MESH_PERR_NO_FI);
1214 vap->iv_stats.is_mesh_fwd_nopath++;
1215 m_freem(mcopy);
1216 return;
1217 }
1218 IEEE80211_ADDR_COPY(whcopy->i_addr1, ni->ni_macaddr);
1219 }
1220 KASSERT(mccopy->mc_ttl > 0, ("%s called with wrong ttl", __func__));
1221 mccopy->mc_ttl--;
1222
1223 /* XXX calculate priority so drivers can find the tx queue */
1224 M_WME_SETAC(mcopy, WME_AC_BE);
1225
1226 /* XXX do we know m_nextpkt is NULL? */
1227 mcopy->m_pkthdr.rcvif = (void *) ni;
1228
1229 /*
1230 * XXX this bypasses all of the VAP TX handling; it passes frames
1231 * directly to the parent interface.
1232 *
1233 * Because of this, there's no TX lock being held as there's no
1234 * encaps state being used.
1235 *
1236 * Doing a direct parent transmit may not be the correct thing
1237 * to do here; we'll have to re-think this soon.
1238 */
1239 IEEE80211_TX_LOCK(ic);
1240 err = ieee80211_parent_xmitpkt(ic, mcopy);
1241 IEEE80211_TX_UNLOCK(ic);
1242 if (!err)
1243 if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1);
1244 }
1245
1246 static struct mbuf *
mesh_decap(struct ieee80211vap * vap,struct mbuf * m,int hdrlen,int meshdrlen)1247 mesh_decap(struct ieee80211vap *vap, struct mbuf *m, int hdrlen, int meshdrlen)
1248 {
1249 #define WHDIR(wh) ((wh)->i_fc[1] & IEEE80211_FC1_DIR_MASK)
1250 #define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc)
1251 uint8_t b[sizeof(struct ieee80211_qosframe_addr4) +
1252 sizeof(struct ieee80211_meshcntl_ae10)];
1253 const struct ieee80211_qosframe_addr4 *wh;
1254 const struct ieee80211_meshcntl_ae10 *mc;
1255 struct ether_header *eh;
1256 struct llc *llc;
1257 int ae;
1258
1259 if (m->m_len < hdrlen + sizeof(*llc) &&
1260 (m = m_pullup(m, hdrlen + sizeof(*llc))) == NULL) {
1261 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ANY,
1262 "discard data frame: %s", "m_pullup failed");
1263 vap->iv_stats.is_rx_tooshort++;
1264 return NULL;
1265 }
1266 memcpy(b, mtod(m, caddr_t), hdrlen);
1267 wh = (const struct ieee80211_qosframe_addr4 *)&b[0];
1268 mc = (const struct ieee80211_meshcntl_ae10 *)&b[hdrlen - meshdrlen];
1269 KASSERT(WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS ||
1270 WHDIR(wh) == IEEE80211_FC1_DIR_DSTODS,
1271 ("bogus dir, fc 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1]));
1272
1273 llc = (struct llc *)(mtod(m, caddr_t) + hdrlen);
1274 if (llc->llc_dsap == LLC_SNAP_LSAP && llc->llc_ssap == LLC_SNAP_LSAP &&
1275 llc->llc_control == LLC_UI && llc->llc_snap.org_code[0] == 0 &&
1276 llc->llc_snap.org_code[1] == 0 && llc->llc_snap.org_code[2] == 0 &&
1277 /* NB: preserve AppleTalk frames that have a native SNAP hdr */
1278 !(llc->llc_snap.ether_type == htons(ETHERTYPE_AARP) ||
1279 llc->llc_snap.ether_type == htons(ETHERTYPE_IPX))) {
1280 m_adj(m, hdrlen + sizeof(struct llc) - sizeof(*eh));
1281 llc = NULL;
1282 } else {
1283 m_adj(m, hdrlen - sizeof(*eh));
1284 }
1285 eh = mtod(m, struct ether_header *);
1286 ae = mc->mc_flags & IEEE80211_MESH_AE_MASK;
1287 if (WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS) {
1288 IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr1);
1289 if (ae == IEEE80211_MESH_AE_00) {
1290 IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr3);
1291 } else if (ae == IEEE80211_MESH_AE_01) {
1292 IEEE80211_ADDR_COPY(eh->ether_shost,
1293 MC01(mc)->mc_addr4);
1294 } else {
1295 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1296 (const struct ieee80211_frame *)wh, NULL,
1297 "bad AE %d", ae);
1298 vap->iv_stats.is_mesh_badae++;
1299 m_freem(m);
1300 return NULL;
1301 }
1302 } else {
1303 if (ae == IEEE80211_MESH_AE_00) {
1304 IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr3);
1305 IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr4);
1306 } else if (ae == IEEE80211_MESH_AE_10) {
1307 IEEE80211_ADDR_COPY(eh->ether_dhost, mc->mc_addr5);
1308 IEEE80211_ADDR_COPY(eh->ether_shost, mc->mc_addr6);
1309 } else {
1310 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1311 (const struct ieee80211_frame *)wh, NULL,
1312 "bad AE %d", ae);
1313 vap->iv_stats.is_mesh_badae++;
1314 m_freem(m);
1315 return NULL;
1316 }
1317 }
1318 #ifndef __NO_STRICT_ALIGNMENT
1319 if (!ALIGNED_POINTER(mtod(m, caddr_t) + sizeof(*eh), uint32_t)) {
1320 m = ieee80211_realign(vap, m, sizeof(*eh));
1321 if (m == NULL)
1322 return NULL;
1323 }
1324 #endif /* !__NO_STRICT_ALIGNMENT */
1325 if (llc != NULL) {
1326 eh = mtod(m, struct ether_header *);
1327 eh->ether_type = htons(m->m_pkthdr.len - sizeof(*eh));
1328 }
1329 return m;
1330 #undef WDIR
1331 #undef MC01
1332 }
1333
1334 /*
1335 * Return non-zero if the unicast mesh data frame should be processed
1336 * locally. Frames that are not proxy'd have our address, otherwise
1337 * we need to consult the routing table to look for a proxy entry.
1338 */
1339 static __inline int
mesh_isucastforme(struct ieee80211vap * vap,const struct ieee80211_frame * wh,const struct ieee80211_meshcntl * mc)1340 mesh_isucastforme(struct ieee80211vap *vap, const struct ieee80211_frame *wh,
1341 const struct ieee80211_meshcntl *mc)
1342 {
1343 int ae = mc->mc_flags & 3;
1344
1345 KASSERT((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) == IEEE80211_FC1_DIR_DSTODS,
1346 ("bad dir 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1]));
1347 KASSERT(ae == IEEE80211_MESH_AE_00 || ae == IEEE80211_MESH_AE_10,
1348 ("bad AE %d", ae));
1349 if (ae == IEEE80211_MESH_AE_10) { /* ucast w/ proxy */
1350 const struct ieee80211_meshcntl_ae10 *mc10 =
1351 (const struct ieee80211_meshcntl_ae10 *) mc;
1352 struct ieee80211_mesh_route *rt =
1353 ieee80211_mesh_rt_find(vap, mc10->mc_addr5);
1354 /* check for proxy route to ourself */
1355 return (rt != NULL &&
1356 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY));
1357 } else /* ucast w/o proxy */
1358 return IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_myaddr);
1359 }
1360
1361 /*
1362 * Verifies transmitter, updates lifetime, precursor list and forwards data.
1363 * > 0 means we have forwarded data and no need to process locally
1364 * == 0 means we want to process locally (and we may have forwarded data
1365 * < 0 means there was an error and data should be discarded
1366 */
1367 static int
mesh_recv_indiv_data_to_fwrd(struct ieee80211vap * vap,struct mbuf * m,struct ieee80211_frame * wh,const struct ieee80211_meshcntl * mc)1368 mesh_recv_indiv_data_to_fwrd(struct ieee80211vap *vap, struct mbuf *m,
1369 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc)
1370 {
1371 struct ieee80211_qosframe_addr4 *qwh;
1372 struct ieee80211_mesh_state *ms = vap->iv_mesh;
1373 struct ieee80211_mesh_route *rt_meshda, *rt_meshsa;
1374
1375 /* This is called from the RX path - don't hold this lock */
1376 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
1377
1378 qwh = (struct ieee80211_qosframe_addr4 *)wh;
1379
1380 /*
1381 * TODO:
1382 * o verify addr2 is a legitimate transmitter
1383 * o lifetime of precursor of addr3 (addr2) is max(init, curr)
1384 * o lifetime of precursor of addr4 (nexthop) is max(init, curr)
1385 */
1386
1387 /* set lifetime of addr3 (meshDA) to initial value */
1388 rt_meshda = ieee80211_mesh_rt_find(vap, qwh->i_addr3);
1389 if (rt_meshda == NULL) {
1390 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, qwh->i_addr2,
1391 "no route to meshDA(%6D)", qwh->i_addr3, ":");
1392 /*
1393 * [Optional] any of the following three actions:
1394 * o silently discard [X]
1395 * o trigger a path discovery [ ]
1396 * o inform TA that meshDA is unknown. [ ]
1397 */
1398 /* XXX: stats */
1399 return (-1);
1400 }
1401
1402 ieee80211_mesh_rt_update(rt_meshda, ticks_to_msecs(
1403 ms->ms_ppath->mpp_inact));
1404
1405 /* set lifetime of addr4 (meshSA) to initial value */
1406 rt_meshsa = ieee80211_mesh_rt_find(vap, qwh->i_addr4);
1407 KASSERT(rt_meshsa != NULL, ("no route"));
1408 ieee80211_mesh_rt_update(rt_meshsa, ticks_to_msecs(
1409 ms->ms_ppath->mpp_inact));
1410
1411 mesh_forward(vap, m, mc);
1412 return (1); /* dont process locally */
1413 }
1414
1415 /*
1416 * Verifies transmitter, updates lifetime, precursor list and process data
1417 * locally, if data is proxy with AE = 10 it could mean data should go
1418 * on another mesh path or data should be forwarded to the DS.
1419 *
1420 * > 0 means we have forwarded data and no need to process locally
1421 * == 0 means we want to process locally (and we may have forwarded data
1422 * < 0 means there was an error and data should be discarded
1423 */
1424 static int
mesh_recv_indiv_data_to_me(struct ieee80211vap * vap,struct mbuf * m,struct ieee80211_frame * wh,const struct ieee80211_meshcntl * mc)1425 mesh_recv_indiv_data_to_me(struct ieee80211vap *vap, struct mbuf *m,
1426 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc)
1427 {
1428 struct ieee80211_qosframe_addr4 *qwh;
1429 const struct ieee80211_meshcntl_ae10 *mc10;
1430 struct ieee80211_mesh_state *ms = vap->iv_mesh;
1431 struct ieee80211_mesh_route *rt;
1432 int ae;
1433
1434 /* This is called from the RX path - don't hold this lock */
1435 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
1436
1437 qwh = (struct ieee80211_qosframe_addr4 *)wh;
1438 mc10 = (const struct ieee80211_meshcntl_ae10 *)mc;
1439
1440 /*
1441 * TODO:
1442 * o verify addr2 is a legitimate transmitter
1443 * o lifetime of precursor entry is max(init, curr)
1444 */
1445
1446 /* set lifetime of addr4 (meshSA) to initial value */
1447 rt = ieee80211_mesh_rt_find(vap, qwh->i_addr4);
1448 KASSERT(rt != NULL, ("no route"));
1449 ieee80211_mesh_rt_update(rt, ticks_to_msecs(ms->ms_ppath->mpp_inact));
1450 rt = NULL;
1451
1452 ae = mc10->mc_flags & IEEE80211_MESH_AE_MASK;
1453 KASSERT(ae == IEEE80211_MESH_AE_00 ||
1454 ae == IEEE80211_MESH_AE_10, ("bad AE %d", ae));
1455 if (ae == IEEE80211_MESH_AE_10) {
1456 if (IEEE80211_ADDR_EQ(mc10->mc_addr5, qwh->i_addr3)) {
1457 return (0); /* process locally */
1458 }
1459
1460 rt = ieee80211_mesh_rt_find(vap, mc10->mc_addr5);
1461 if (rt != NULL &&
1462 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) &&
1463 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) == 0) {
1464 /*
1465 * Forward on another mesh-path, according to
1466 * amendment as specified in 9.32.4.1
1467 */
1468 IEEE80211_ADDR_COPY(qwh->i_addr3, mc10->mc_addr5);
1469 mesh_forward(vap, m,
1470 (const struct ieee80211_meshcntl *)mc10);
1471 return (1); /* dont process locally */
1472 }
1473 /*
1474 * All other cases: forward of MSDUs from the MBSS to DS indiv.
1475 * addressed according to 13.11.3.2.
1476 */
1477 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, qwh->i_addr2,
1478 "forward frame to DS, SA(%6D) DA(%6D)",
1479 mc10->mc_addr6, ":", mc10->mc_addr5, ":");
1480 }
1481 return (0); /* process locally */
1482 }
1483
1484 /*
1485 * Try to forward the group addressed data on to other mesh STAs, and
1486 * also to the DS.
1487 *
1488 * > 0 means we have forwarded data and no need to process locally
1489 * == 0 means we want to process locally (and we may have forwarded data
1490 * < 0 means there was an error and data should be discarded
1491 */
1492 static int
mesh_recv_group_data(struct ieee80211vap * vap,struct mbuf * m,struct ieee80211_frame * wh,const struct ieee80211_meshcntl * mc)1493 mesh_recv_group_data(struct ieee80211vap *vap, struct mbuf *m,
1494 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc)
1495 {
1496 #define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc)
1497 struct ieee80211_mesh_state *ms = vap->iv_mesh;
1498
1499 /* This is called from the RX path - don't hold this lock */
1500 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
1501
1502 mesh_forward(vap, m, mc);
1503
1504 if(mc->mc_ttl > 0) {
1505 if (mc->mc_flags & IEEE80211_MESH_AE_01) {
1506 /*
1507 * Forward of MSDUs from the MBSS to DS group addressed
1508 * (according to 13.11.3.2)
1509 * This happens by delivering the packet, and a bridge
1510 * will sent it on another port member.
1511 */
1512 if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE &&
1513 ms->ms_flags & IEEE80211_MESHFLAGS_FWD)
1514 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH,
1515 MC01(mc)->mc_addr4, "%s",
1516 "forward from MBSS to the DS");
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 #define MC10(mc) ((const struct ieee80211_meshcntl_ae10 *)mc)
1530 struct ieee80211vap *vap = ni->ni_vap;
1531 struct ieee80211com *ic = ni->ni_ic;
1532 struct ifnet *ifp = vap->iv_ifp;
1533 struct ieee80211_frame *wh;
1534 const struct ieee80211_meshcntl *mc;
1535 int hdrspace, meshdrlen, need_tap, error;
1536 uint8_t dir, type, subtype, ae;
1537 uint32_t seq;
1538 const uint8_t *addr;
1539 uint8_t qos[2];
1540 ieee80211_seq rxseq;
1541
1542 KASSERT(ni != NULL, ("null node"));
1543 ni->ni_inact = ni->ni_inact_reload;
1544
1545 need_tap = 1; /* mbuf need to be tapped. */
1546 type = -1; /* undefined */
1547
1548 /* This is called from the RX path - don't hold this lock */
1549 IEEE80211_TX_UNLOCK_ASSERT(ic);
1550
1551 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) {
1552 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1553 ni->ni_macaddr, NULL,
1554 "too short (1): len %u", m->m_pkthdr.len);
1555 vap->iv_stats.is_rx_tooshort++;
1556 goto out;
1557 }
1558 /*
1559 * Bit of a cheat here, we use a pointer for a 3-address
1560 * frame format but don't reference fields past outside
1561 * ieee80211_frame_min w/o first validating the data is
1562 * present.
1563 */
1564 wh = mtod(m, struct ieee80211_frame *);
1565
1566 if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) !=
1567 IEEE80211_FC0_VERSION_0) {
1568 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1569 ni->ni_macaddr, NULL, "wrong version %x", wh->i_fc[0]);
1570 vap->iv_stats.is_rx_badversion++;
1571 goto err;
1572 }
1573 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK;
1574 type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK;
1575 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK;
1576 if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) {
1577 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi);
1578 ni->ni_noise = nf;
1579 if (HAS_SEQ(type)) {
1580 uint8_t tid = ieee80211_gettid(wh);
1581
1582 if (IEEE80211_QOS_HAS_SEQ(wh) &&
1583 TID_TO_WME_AC(tid) >= WME_AC_VI)
1584 ic->ic_wme.wme_hipri_traffic++;
1585 rxseq = le16toh(*(uint16_t *)wh->i_seq);
1586 if (! ieee80211_check_rxseq(ni, wh)) {
1587 /* duplicate, discard */
1588 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
1589 wh->i_addr1, "duplicate",
1590 "seqno <%u,%u> fragno <%u,%u> tid %u",
1591 rxseq >> IEEE80211_SEQ_SEQ_SHIFT,
1592 ni->ni_rxseqs[tid] >>
1593 IEEE80211_SEQ_SEQ_SHIFT,
1594 rxseq & IEEE80211_SEQ_FRAG_MASK,
1595 ni->ni_rxseqs[tid] &
1596 IEEE80211_SEQ_FRAG_MASK,
1597 tid);
1598 vap->iv_stats.is_rx_dup++;
1599 IEEE80211_NODE_STAT(ni, rx_dup);
1600 goto out;
1601 }
1602 ni->ni_rxseqs[tid] = rxseq;
1603 }
1604 }
1605 #ifdef IEEE80211_DEBUG
1606 /*
1607 * It's easier, but too expensive, to simulate different mesh
1608 * topologies by consulting the ACL policy very early, so do this
1609 * only under DEBUG.
1610 *
1611 * NB: this check is also done upon peering link initiation.
1612 */
1613 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) {
1614 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL,
1615 wh, NULL, "%s", "disallowed by ACL");
1616 vap->iv_stats.is_rx_acl++;
1617 goto out;
1618 }
1619 #endif
1620 switch (type) {
1621 case IEEE80211_FC0_TYPE_DATA:
1622 if (ni == vap->iv_bss)
1623 goto out;
1624 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) {
1625 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
1626 ni->ni_macaddr, NULL,
1627 "peer link not yet established (%d)",
1628 ni->ni_mlstate);
1629 vap->iv_stats.is_mesh_nolink++;
1630 goto out;
1631 }
1632 if (dir != IEEE80211_FC1_DIR_FROMDS &&
1633 dir != IEEE80211_FC1_DIR_DSTODS) {
1634 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1635 wh, "data", "incorrect dir 0x%x", dir);
1636 vap->iv_stats.is_rx_wrongdir++;
1637 goto err;
1638 }
1639
1640 /* All Mesh data frames are QoS subtype */
1641 if (!HAS_SEQ(type)) {
1642 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1643 wh, "data", "incorrect subtype 0x%x", subtype);
1644 vap->iv_stats.is_rx_badsubtype++;
1645 goto err;
1646 }
1647
1648 /*
1649 * Next up, any fragmentation.
1650 * XXX: we defrag before we even try to forward,
1651 * Mesh Control field is not present in sub-sequent
1652 * fragmented frames. This is in contrast to Draft 4.0.
1653 */
1654 hdrspace = ieee80211_hdrspace(ic, wh);
1655 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1656 m = ieee80211_defrag(ni, m, hdrspace);
1657 if (m == NULL) {
1658 /* Fragment dropped or frame not complete yet */
1659 goto out;
1660 }
1661 }
1662 wh = mtod(m, struct ieee80211_frame *); /* NB: after defrag */
1663
1664 /*
1665 * Now we have a complete Mesh Data frame.
1666 */
1667
1668 /*
1669 * Only fromDStoDS data frames use 4 address qos frames
1670 * as specified in amendment. Otherwise addr4 is located
1671 * in the Mesh Control field and a 3 address qos frame
1672 * is used.
1673 */
1674 if (IEEE80211_IS_DSTODS(wh))
1675 *(uint16_t *)qos = *(uint16_t *)
1676 ((struct ieee80211_qosframe_addr4 *)wh)->i_qos;
1677 else
1678 *(uint16_t *)qos = *(uint16_t *)
1679 ((struct ieee80211_qosframe *)wh)->i_qos;
1680
1681 /*
1682 * NB: The mesh STA sets the Mesh Control Present
1683 * subfield to 1 in the Mesh Data frame containing
1684 * an unfragmented MSDU, an A-MSDU, or the first
1685 * fragment of an MSDU.
1686 * After defrag it should always be present.
1687 */
1688 if (!(qos[1] & IEEE80211_QOS_MC)) {
1689 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
1690 ni->ni_macaddr, NULL,
1691 "%s", "Mesh control field not present");
1692 vap->iv_stats.is_rx_elem_missing++; /* XXX: kinda */
1693 goto err;
1694 }
1695
1696 /* pull up enough to get to the mesh control */
1697 if (m->m_len < hdrspace + sizeof(struct ieee80211_meshcntl) &&
1698 (m = m_pullup(m, hdrspace +
1699 sizeof(struct ieee80211_meshcntl))) == NULL) {
1700 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1701 ni->ni_macaddr, NULL,
1702 "data too short: expecting %u", hdrspace);
1703 vap->iv_stats.is_rx_tooshort++;
1704 goto out; /* XXX */
1705 }
1706 /*
1707 * Now calculate the full extent of the headers. Note
1708 * mesh_decap will pull up anything we didn't get
1709 * above when it strips the 802.11 headers.
1710 */
1711 mc = (const struct ieee80211_meshcntl *)
1712 (mtod(m, const uint8_t *) + hdrspace);
1713 ae = mc->mc_flags & IEEE80211_MESH_AE_MASK;
1714 meshdrlen = sizeof(struct ieee80211_meshcntl) +
1715 ae * IEEE80211_ADDR_LEN;
1716 hdrspace += meshdrlen;
1717
1718 /* pull complete hdrspace = ieee80211_hdrspace + meshcontrol */
1719 if ((meshdrlen > sizeof(struct ieee80211_meshcntl)) &&
1720 (m->m_len < hdrspace) &&
1721 ((m = m_pullup(m, hdrspace)) == NULL)) {
1722 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1723 ni->ni_macaddr, NULL,
1724 "data too short: expecting %u", hdrspace);
1725 vap->iv_stats.is_rx_tooshort++;
1726 goto out; /* XXX */
1727 }
1728 /* XXX: are we sure there is no reallocating after m_pullup? */
1729
1730 seq = LE_READ_4(mc->mc_seq);
1731 if (IEEE80211_IS_MULTICAST(wh->i_addr1))
1732 addr = wh->i_addr3;
1733 else if (ae == IEEE80211_MESH_AE_01)
1734 addr = MC01(mc)->mc_addr4;
1735 else
1736 addr = ((struct ieee80211_qosframe_addr4 *)wh)->i_addr4;
1737 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, addr)) {
1738 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
1739 addr, "data", "%s", "not to me");
1740 vap->iv_stats.is_rx_wrongbss++; /* XXX kinda */
1741 goto out;
1742 }
1743 if (mesh_checkpseq(vap, addr, seq) != 0) {
1744 vap->iv_stats.is_rx_dup++;
1745 goto out;
1746 }
1747
1748 /* This code "routes" the frame to the right control path */
1749 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1750 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr3))
1751 error =
1752 mesh_recv_indiv_data_to_me(vap, m, wh, mc);
1753 else if (IEEE80211_IS_MULTICAST(wh->i_addr3))
1754 error = mesh_recv_group_data(vap, m, wh, mc);
1755 else
1756 error = mesh_recv_indiv_data_to_fwrd(vap, m,
1757 wh, mc);
1758 } else
1759 error = mesh_recv_group_data(vap, m, wh, mc);
1760 if (error < 0)
1761 goto err;
1762 else if (error > 0)
1763 goto out;
1764
1765 if (ieee80211_radiotap_active_vap(vap))
1766 ieee80211_radiotap_rx(vap, m);
1767 need_tap = 0;
1768
1769 /*
1770 * Finally, strip the 802.11 header.
1771 */
1772 m = mesh_decap(vap, m, hdrspace, meshdrlen);
1773 if (m == NULL) {
1774 /* XXX mask bit to check for both */
1775 /* don't count Null data frames as errors */
1776 if (subtype == IEEE80211_FC0_SUBTYPE_NODATA ||
1777 subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL)
1778 goto out;
1779 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
1780 ni->ni_macaddr, "data", "%s", "decap error");
1781 vap->iv_stats.is_rx_decap++;
1782 IEEE80211_NODE_STAT(ni, rx_decap);
1783 goto err;
1784 }
1785 if (qos[0] & IEEE80211_QOS_AMSDU) {
1786 m = ieee80211_decap_amsdu(ni, m);
1787 if (m == NULL)
1788 return IEEE80211_FC0_TYPE_DATA;
1789 }
1790 ieee80211_deliver_data(vap, ni, m);
1791 return type;
1792 case IEEE80211_FC0_TYPE_MGT:
1793 vap->iv_stats.is_rx_mgmt++;
1794 IEEE80211_NODE_STAT(ni, rx_mgmt);
1795 if (dir != IEEE80211_FC1_DIR_NODS) {
1796 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1797 wh, "mgt", "incorrect dir 0x%x", dir);
1798 vap->iv_stats.is_rx_wrongdir++;
1799 goto err;
1800 }
1801 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) {
1802 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1803 ni->ni_macaddr, "mgt", "too short: len %u",
1804 m->m_pkthdr.len);
1805 vap->iv_stats.is_rx_tooshort++;
1806 goto out;
1807 }
1808 #ifdef IEEE80211_DEBUG
1809 if ((ieee80211_msg_debug(vap) &&
1810 (vap->iv_ic->ic_flags & IEEE80211_F_SCAN)) ||
1811 ieee80211_msg_dumppkts(vap)) {
1812 if_printf(ifp, "received %s from %s rssi %d\n",
1813 ieee80211_mgt_subtype_name[subtype >>
1814 IEEE80211_FC0_SUBTYPE_SHIFT],
1815 ether_sprintf(wh->i_addr2), rssi);
1816 }
1817 #endif
1818 if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) {
1819 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1820 wh, NULL, "%s", "WEP set but not permitted");
1821 vap->iv_stats.is_rx_mgtdiscard++; /* XXX */
1822 goto out;
1823 }
1824 vap->iv_recv_mgmt(ni, m, subtype, rxs, rssi, nf);
1825 goto out;
1826 case IEEE80211_FC0_TYPE_CTL:
1827 vap->iv_stats.is_rx_ctl++;
1828 IEEE80211_NODE_STAT(ni, rx_ctrl);
1829 goto out;
1830 default:
1831 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1832 wh, "bad", "frame type 0x%x", type);
1833 /* should not come here */
1834 break;
1835 }
1836 err:
1837 if_inc_counter(ifp, IFCOUNTER_IERRORS, 1);
1838 out:
1839 if (m != NULL) {
1840 if (need_tap && ieee80211_radiotap_active_vap(vap))
1841 ieee80211_radiotap_rx(vap, m);
1842 m_freem(m);
1843 }
1844 return type;
1845 #undef HAS_SEQ
1846 #undef MC01
1847 #undef MC10
1848 }
1849
1850 static void
mesh_recv_mgmt(struct ieee80211_node * ni,struct mbuf * m0,int subtype,const struct ieee80211_rx_stats * rxs,int rssi,int nf)1851 mesh_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, int subtype,
1852 const struct ieee80211_rx_stats *rxs, int rssi, int nf)
1853 {
1854 struct ieee80211vap *vap = ni->ni_vap;
1855 struct ieee80211_mesh_state *ms = vap->iv_mesh;
1856 struct ieee80211com *ic = ni->ni_ic;
1857 struct ieee80211_channel *rxchan = ic->ic_curchan;
1858 struct ieee80211_frame *wh;
1859 struct ieee80211_mesh_route *rt;
1860 uint8_t *frm, *efrm;
1861
1862 wh = mtod(m0, struct ieee80211_frame *);
1863 frm = (uint8_t *)&wh[1];
1864 efrm = mtod(m0, uint8_t *) + m0->m_len;
1865 switch (subtype) {
1866 case IEEE80211_FC0_SUBTYPE_PROBE_RESP:
1867 case IEEE80211_FC0_SUBTYPE_BEACON:
1868 {
1869 struct ieee80211_scanparams scan;
1870 struct ieee80211_channel *c;
1871 /*
1872 * We process beacon/probe response
1873 * frames to discover neighbors.
1874 */
1875 if (rxs != NULL) {
1876 c = ieee80211_lookup_channel_rxstatus(vap, rxs);
1877 if (c != NULL)
1878 rxchan = c;
1879 }
1880 if (ieee80211_parse_beacon(ni, m0, rxchan, &scan) != 0)
1881 return;
1882 /*
1883 * Count frame now that we know it's to be processed.
1884 */
1885 if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) {
1886 vap->iv_stats.is_rx_beacon++; /* XXX remove */
1887 IEEE80211_NODE_STAT(ni, rx_beacons);
1888 } else
1889 IEEE80211_NODE_STAT(ni, rx_proberesp);
1890 /*
1891 * If scanning, just pass information to the scan module.
1892 */
1893 if (ic->ic_flags & IEEE80211_F_SCAN) {
1894 if (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN) {
1895 /*
1896 * Actively scanning a channel marked passive;
1897 * send a probe request now that we know there
1898 * is 802.11 traffic present.
1899 *
1900 * XXX check if the beacon we recv'd gives
1901 * us what we need and suppress the probe req
1902 */
1903 ieee80211_probe_curchan(vap, 1);
1904 ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN;
1905 }
1906 ieee80211_add_scan(vap, rxchan, &scan, wh,
1907 subtype, rssi, nf);
1908 return;
1909 }
1910
1911 /* The rest of this code assumes we are running */
1912 if (vap->iv_state != IEEE80211_S_RUN)
1913 return;
1914 /*
1915 * Ignore non-mesh STAs.
1916 */
1917 if ((scan.capinfo &
1918 (IEEE80211_CAPINFO_ESS|IEEE80211_CAPINFO_IBSS)) ||
1919 scan.meshid == NULL || scan.meshconf == NULL) {
1920 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1921 wh, "beacon", "%s", "not a mesh sta");
1922 vap->iv_stats.is_mesh_wrongmesh++;
1923 return;
1924 }
1925 /*
1926 * Ignore STAs for other mesh networks.
1927 */
1928 if (memcmp(scan.meshid+2, ms->ms_id, ms->ms_idlen) != 0 ||
1929 mesh_verify_meshconf(vap, scan.meshconf)) {
1930 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1931 wh, "beacon", "%s", "not for our mesh");
1932 vap->iv_stats.is_mesh_wrongmesh++;
1933 return;
1934 }
1935 /*
1936 * Peer only based on the current ACL policy.
1937 */
1938 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) {
1939 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL,
1940 wh, NULL, "%s", "disallowed by ACL");
1941 vap->iv_stats.is_rx_acl++;
1942 return;
1943 }
1944 /*
1945 * Do neighbor discovery.
1946 */
1947 if (!IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_macaddr)) {
1948 /*
1949 * Create a new entry in the neighbor table.
1950 */
1951 ni = ieee80211_add_neighbor(vap, wh, &scan);
1952 }
1953 /*
1954 * Automatically peer with discovered nodes if possible.
1955 */
1956 if (ni != vap->iv_bss &&
1957 (ms->ms_flags & IEEE80211_MESHFLAGS_AP)) {
1958 switch (ni->ni_mlstate) {
1959 case IEEE80211_NODE_MESH_IDLE:
1960 {
1961 uint16_t args[1];
1962
1963 /* Wait for backoff callout to reset counter */
1964 if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding)
1965 return;
1966
1967 ni->ni_mlpid = mesh_generateid(vap);
1968 if (ni->ni_mlpid == 0)
1969 return;
1970 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENSNT);
1971 args[0] = ni->ni_mlpid;
1972 ieee80211_send_action(ni,
1973 IEEE80211_ACTION_CAT_SELF_PROT,
1974 IEEE80211_ACTION_MESHPEERING_OPEN, args);
1975 ni->ni_mlrcnt = 0;
1976 mesh_peer_timeout_setup(ni);
1977 break;
1978 }
1979 case IEEE80211_NODE_MESH_ESTABLISHED:
1980 {
1981 /*
1982 * Valid beacon from a peer mesh STA
1983 * bump TA lifetime
1984 */
1985 rt = ieee80211_mesh_rt_find(vap, wh->i_addr2);
1986 if(rt != NULL) {
1987 ieee80211_mesh_rt_update(rt,
1988 ticks_to_msecs(
1989 ms->ms_ppath->mpp_inact));
1990 }
1991 break;
1992 }
1993 default:
1994 break; /* ignore */
1995 }
1996 }
1997 break;
1998 }
1999 case IEEE80211_FC0_SUBTYPE_PROBE_REQ:
2000 {
2001 uint8_t *ssid, *meshid, *rates, *xrates;
2002 uint8_t *sfrm;
2003
2004 if (vap->iv_state != IEEE80211_S_RUN) {
2005 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2006 wh, NULL, "wrong state %s",
2007 ieee80211_state_name[vap->iv_state]);
2008 vap->iv_stats.is_rx_mgtdiscard++;
2009 return;
2010 }
2011 if (IEEE80211_IS_MULTICAST(wh->i_addr2)) {
2012 /* frame must be directed */
2013 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2014 wh, NULL, "%s", "not unicast");
2015 vap->iv_stats.is_rx_mgtdiscard++; /* XXX stat */
2016 return;
2017 }
2018 /*
2019 * prreq frame format
2020 * [tlv] ssid
2021 * [tlv] supported rates
2022 * [tlv] extended supported rates
2023 * [tlv] mesh id
2024 */
2025 ssid = meshid = rates = xrates = NULL;
2026 sfrm = frm;
2027 while (efrm - frm > 1) {
2028 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return);
2029 switch (*frm) {
2030 case IEEE80211_ELEMID_SSID:
2031 ssid = frm;
2032 break;
2033 case IEEE80211_ELEMID_RATES:
2034 rates = frm;
2035 break;
2036 case IEEE80211_ELEMID_XRATES:
2037 xrates = frm;
2038 break;
2039 case IEEE80211_ELEMID_MESHID:
2040 meshid = frm;
2041 break;
2042 }
2043 frm += frm[1] + 2;
2044 }
2045 IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return);
2046 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return);
2047 if (xrates != NULL)
2048 IEEE80211_VERIFY_ELEMENT(xrates,
2049 IEEE80211_RATE_MAXSIZE - rates[1], return);
2050 if (meshid != NULL) {
2051 IEEE80211_VERIFY_ELEMENT(meshid,
2052 IEEE80211_MESHID_LEN, return);
2053 /* NB: meshid, not ssid */
2054 IEEE80211_VERIFY_SSID(vap->iv_bss, meshid, return);
2055 }
2056
2057 /* XXX find a better class or define it's own */
2058 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_INPUT, wh->i_addr2,
2059 "%s", "recv probe req");
2060 /*
2061 * Some legacy 11b clients cannot hack a complete
2062 * probe response frame. When the request includes
2063 * only a bare-bones rate set, communicate this to
2064 * the transmit side.
2065 */
2066 ieee80211_send_proberesp(vap, wh->i_addr2, 0);
2067 break;
2068 }
2069
2070 case IEEE80211_FC0_SUBTYPE_ACTION:
2071 case IEEE80211_FC0_SUBTYPE_ACTION_NOACK:
2072 if (ni == vap->iv_bss) {
2073 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2074 wh, NULL, "%s", "unknown node");
2075 vap->iv_stats.is_rx_mgtdiscard++;
2076 } else if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) &&
2077 !IEEE80211_IS_MULTICAST(wh->i_addr1)) {
2078 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2079 wh, NULL, "%s", "not for us");
2080 vap->iv_stats.is_rx_mgtdiscard++;
2081 } else if (vap->iv_state != IEEE80211_S_RUN) {
2082 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2083 wh, NULL, "wrong state %s",
2084 ieee80211_state_name[vap->iv_state]);
2085 vap->iv_stats.is_rx_mgtdiscard++;
2086 } else {
2087 if (ieee80211_parse_action(ni, m0) == 0)
2088 (void)ic->ic_recv_action(ni, wh, frm, efrm);
2089 }
2090 break;
2091
2092 case IEEE80211_FC0_SUBTYPE_ASSOC_REQ:
2093 case IEEE80211_FC0_SUBTYPE_ASSOC_RESP:
2094 case IEEE80211_FC0_SUBTYPE_REASSOC_REQ:
2095 case IEEE80211_FC0_SUBTYPE_REASSOC_RESP:
2096 case IEEE80211_FC0_SUBTYPE_ATIM:
2097 case IEEE80211_FC0_SUBTYPE_DISASSOC:
2098 case IEEE80211_FC0_SUBTYPE_AUTH:
2099 case IEEE80211_FC0_SUBTYPE_DEAUTH:
2100 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2101 wh, NULL, "%s", "not handled");
2102 vap->iv_stats.is_rx_mgtdiscard++;
2103 break;
2104
2105 default:
2106 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
2107 wh, "mgt", "subtype 0x%x not handled", subtype);
2108 vap->iv_stats.is_rx_badsubtype++;
2109 break;
2110 }
2111 }
2112
2113 static void
mesh_recv_ctl(struct ieee80211_node * ni,struct mbuf * m,int subtype)2114 mesh_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype)
2115 {
2116
2117 switch (subtype) {
2118 case IEEE80211_FC0_SUBTYPE_BAR:
2119 ieee80211_recv_bar(ni, m);
2120 break;
2121 }
2122 }
2123
2124 /*
2125 * Parse meshpeering action ie's for MPM frames
2126 */
2127 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)2128 mesh_parse_meshpeering_action(struct ieee80211_node *ni,
2129 const struct ieee80211_frame *wh, /* XXX for VERIFY_LENGTH */
2130 const uint8_t *frm, const uint8_t *efrm,
2131 struct ieee80211_meshpeer_ie *mp, uint8_t subtype)
2132 {
2133 struct ieee80211vap *vap = ni->ni_vap;
2134 const struct ieee80211_meshpeer_ie *mpie;
2135 uint16_t args[3];
2136 const uint8_t *meshid, *meshconf, *meshpeer;
2137 uint8_t sendclose = 0; /* 1 = MPM frame rejected, close will be sent */
2138
2139 meshid = meshconf = meshpeer = NULL;
2140 while (efrm - frm > 1) {
2141 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return NULL);
2142 switch (*frm) {
2143 case IEEE80211_ELEMID_MESHID:
2144 meshid = frm;
2145 break;
2146 case IEEE80211_ELEMID_MESHCONF:
2147 meshconf = frm;
2148 break;
2149 case IEEE80211_ELEMID_MESHPEER:
2150 meshpeer = frm;
2151 mpie = (const struct ieee80211_meshpeer_ie *) frm;
2152 memset(mp, 0, sizeof(*mp));
2153 mp->peer_len = mpie->peer_len;
2154 mp->peer_proto = LE_READ_2(&mpie->peer_proto);
2155 mp->peer_llinkid = LE_READ_2(&mpie->peer_llinkid);
2156 switch (subtype) {
2157 case IEEE80211_ACTION_MESHPEERING_CONFIRM:
2158 mp->peer_linkid =
2159 LE_READ_2(&mpie->peer_linkid);
2160 break;
2161 case IEEE80211_ACTION_MESHPEERING_CLOSE:
2162 /* NB: peer link ID is optional */
2163 if (mpie->peer_len ==
2164 (IEEE80211_MPM_BASE_SZ + 2)) {
2165 mp->peer_linkid = 0;
2166 mp->peer_rcode =
2167 LE_READ_2(&mpie->peer_linkid);
2168 } else {
2169 mp->peer_linkid =
2170 LE_READ_2(&mpie->peer_linkid);
2171 mp->peer_rcode =
2172 LE_READ_2(&mpie->peer_rcode);
2173 }
2174 break;
2175 }
2176 break;
2177 }
2178 frm += frm[1] + 2;
2179 }
2180
2181 /*
2182 * Verify the contents of the frame.
2183 * If it fails validation, close the peer link.
2184 */
2185 if (mesh_verify_meshpeer(vap, subtype, (const uint8_t *)mp)) {
2186 sendclose = 1;
2187 IEEE80211_DISCARD(vap,
2188 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2189 wh, NULL, "%s", "MPM validation failed");
2190 }
2191
2192 /* If meshid is not the same reject any frames type. */
2193 if (sendclose == 0 && mesh_verify_meshid(vap, meshid)) {
2194 sendclose = 1;
2195 IEEE80211_DISCARD(vap,
2196 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2197 wh, NULL, "%s", "not for our mesh");
2198 if (subtype == IEEE80211_ACTION_MESHPEERING_CLOSE) {
2199 /*
2200 * Standard not clear about this, if we dont ignore
2201 * there will be an endless loop between nodes sending
2202 * CLOSE frames between each other with wrong meshid.
2203 * Discard and timers will bring FSM to IDLE state.
2204 */
2205 return NULL;
2206 }
2207 }
2208
2209 /*
2210 * Close frames are accepted if meshid is the same.
2211 * Verify the other two types.
2212 */
2213 if (sendclose == 0 && subtype != IEEE80211_ACTION_MESHPEERING_CLOSE &&
2214 mesh_verify_meshconf(vap, meshconf)) {
2215 sendclose = 1;
2216 IEEE80211_DISCARD(vap,
2217 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2218 wh, NULL, "%s", "configuration missmatch");
2219 }
2220
2221 if (sendclose) {
2222 vap->iv_stats.is_rx_mgtdiscard++;
2223 switch (ni->ni_mlstate) {
2224 case IEEE80211_NODE_MESH_IDLE:
2225 case IEEE80211_NODE_MESH_ESTABLISHED:
2226 case IEEE80211_NODE_MESH_HOLDING:
2227 /* ignore */
2228 break;
2229 case IEEE80211_NODE_MESH_OPENSNT:
2230 case IEEE80211_NODE_MESH_OPENRCV:
2231 case IEEE80211_NODE_MESH_CONFIRMRCV:
2232 args[0] = ni->ni_mlpid;
2233 args[1] = ni->ni_mllid;
2234 /* Reason codes for rejection */
2235 switch (subtype) {
2236 case IEEE80211_ACTION_MESHPEERING_OPEN:
2237 args[2] = IEEE80211_REASON_MESH_CPVIOLATION;
2238 break;
2239 case IEEE80211_ACTION_MESHPEERING_CONFIRM:
2240 args[2] = IEEE80211_REASON_MESH_INCONS_PARAMS;
2241 break;
2242 }
2243 ieee80211_send_action(ni,
2244 IEEE80211_ACTION_CAT_SELF_PROT,
2245 IEEE80211_ACTION_MESHPEERING_CLOSE,
2246 args);
2247 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2248 mesh_peer_timeout_setup(ni);
2249 break;
2250 }
2251 return NULL;
2252 }
2253
2254 return (const struct ieee80211_meshpeer_ie *) mp;
2255 }
2256
2257 static int
mesh_recv_action_meshpeering_open(struct ieee80211_node * ni,const struct ieee80211_frame * wh,const uint8_t * frm,const uint8_t * efrm)2258 mesh_recv_action_meshpeering_open(struct ieee80211_node *ni,
2259 const struct ieee80211_frame *wh,
2260 const uint8_t *frm, const uint8_t *efrm)
2261 {
2262 struct ieee80211vap *vap = ni->ni_vap;
2263 struct ieee80211_mesh_state *ms = vap->iv_mesh;
2264 struct ieee80211_meshpeer_ie ie;
2265 const struct ieee80211_meshpeer_ie *meshpeer;
2266 uint16_t args[3];
2267
2268 /* +2+2 for action + code + capabilites */
2269 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2, efrm, &ie,
2270 IEEE80211_ACTION_MESHPEERING_OPEN);
2271 if (meshpeer == NULL) {
2272 return 0;
2273 }
2274
2275 /* XXX move up */
2276 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2277 "recv PEER OPEN, lid 0x%x", meshpeer->peer_llinkid);
2278
2279 switch (ni->ni_mlstate) {
2280 case IEEE80211_NODE_MESH_IDLE:
2281 /* Reject open request if reached our maximum neighbor count */
2282 if (ms->ms_neighbors >= IEEE80211_MESH_MAX_NEIGHBORS) {
2283 args[0] = meshpeer->peer_llinkid;
2284 args[1] = 0;
2285 args[2] = IEEE80211_REASON_MESH_MAX_PEERS;
2286 ieee80211_send_action(ni,
2287 IEEE80211_ACTION_CAT_SELF_PROT,
2288 IEEE80211_ACTION_MESHPEERING_CLOSE,
2289 args);
2290 /* stay in IDLE state */
2291 return (0);
2292 }
2293 /* Open frame accepted */
2294 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV);
2295 ni->ni_mllid = meshpeer->peer_llinkid;
2296 ni->ni_mlpid = mesh_generateid(vap);
2297 if (ni->ni_mlpid == 0)
2298 return 0; /* XXX */
2299 args[0] = ni->ni_mlpid;
2300 /* Announce we're open too... */
2301 ieee80211_send_action(ni,
2302 IEEE80211_ACTION_CAT_SELF_PROT,
2303 IEEE80211_ACTION_MESHPEERING_OPEN, args);
2304 /* ...and confirm the link. */
2305 args[0] = ni->ni_mlpid;
2306 args[1] = ni->ni_mllid;
2307 ieee80211_send_action(ni,
2308 IEEE80211_ACTION_CAT_SELF_PROT,
2309 IEEE80211_ACTION_MESHPEERING_CONFIRM,
2310 args);
2311 mesh_peer_timeout_setup(ni);
2312 break;
2313 case IEEE80211_NODE_MESH_OPENRCV:
2314 /* Wrong Link ID */
2315 if (ni->ni_mllid != meshpeer->peer_llinkid) {
2316 args[0] = ni->ni_mllid;
2317 args[1] = ni->ni_mlpid;
2318 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2319 ieee80211_send_action(ni,
2320 IEEE80211_ACTION_CAT_SELF_PROT,
2321 IEEE80211_ACTION_MESHPEERING_CLOSE,
2322 args);
2323 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2324 mesh_peer_timeout_setup(ni);
2325 break;
2326 }
2327 /* Duplicate open, confirm again. */
2328 args[0] = ni->ni_mlpid;
2329 args[1] = ni->ni_mllid;
2330 ieee80211_send_action(ni,
2331 IEEE80211_ACTION_CAT_SELF_PROT,
2332 IEEE80211_ACTION_MESHPEERING_CONFIRM,
2333 args);
2334 break;
2335 case IEEE80211_NODE_MESH_OPENSNT:
2336 ni->ni_mllid = meshpeer->peer_llinkid;
2337 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV);
2338 args[0] = ni->ni_mlpid;
2339 args[1] = ni->ni_mllid;
2340 ieee80211_send_action(ni,
2341 IEEE80211_ACTION_CAT_SELF_PROT,
2342 IEEE80211_ACTION_MESHPEERING_CONFIRM,
2343 args);
2344 /* NB: don't setup/clear any timeout */
2345 break;
2346 case IEEE80211_NODE_MESH_CONFIRMRCV:
2347 if (ni->ni_mlpid != meshpeer->peer_linkid ||
2348 ni->ni_mllid != meshpeer->peer_llinkid) {
2349 args[0] = ni->ni_mlpid;
2350 args[1] = ni->ni_mllid;
2351 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2352 ieee80211_send_action(ni,
2353 IEEE80211_ACTION_CAT_SELF_PROT,
2354 IEEE80211_ACTION_MESHPEERING_CLOSE,
2355 args);
2356 mesh_linkchange(ni,
2357 IEEE80211_NODE_MESH_HOLDING);
2358 mesh_peer_timeout_setup(ni);
2359 break;
2360 }
2361 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED);
2362 ni->ni_mllid = meshpeer->peer_llinkid;
2363 args[0] = ni->ni_mlpid;
2364 args[1] = ni->ni_mllid;
2365 ieee80211_send_action(ni,
2366 IEEE80211_ACTION_CAT_SELF_PROT,
2367 IEEE80211_ACTION_MESHPEERING_CONFIRM,
2368 args);
2369 mesh_peer_timeout_stop(ni);
2370 break;
2371 case IEEE80211_NODE_MESH_ESTABLISHED:
2372 if (ni->ni_mllid != meshpeer->peer_llinkid) {
2373 args[0] = ni->ni_mllid;
2374 args[1] = ni->ni_mlpid;
2375 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2376 ieee80211_send_action(ni,
2377 IEEE80211_ACTION_CAT_SELF_PROT,
2378 IEEE80211_ACTION_MESHPEERING_CLOSE,
2379 args);
2380 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2381 mesh_peer_timeout_setup(ni);
2382 break;
2383 }
2384 args[0] = ni->ni_mlpid;
2385 args[1] = ni->ni_mllid;
2386 ieee80211_send_action(ni,
2387 IEEE80211_ACTION_CAT_SELF_PROT,
2388 IEEE80211_ACTION_MESHPEERING_CONFIRM,
2389 args);
2390 break;
2391 case IEEE80211_NODE_MESH_HOLDING:
2392 args[0] = ni->ni_mlpid;
2393 args[1] = meshpeer->peer_llinkid;
2394 /* Standard not clear about what the reaason code should be */
2395 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2396 ieee80211_send_action(ni,
2397 IEEE80211_ACTION_CAT_SELF_PROT,
2398 IEEE80211_ACTION_MESHPEERING_CLOSE,
2399 args);
2400 break;
2401 }
2402 return 0;
2403 }
2404
2405 static int
mesh_recv_action_meshpeering_confirm(struct ieee80211_node * ni,const struct ieee80211_frame * wh,const uint8_t * frm,const uint8_t * efrm)2406 mesh_recv_action_meshpeering_confirm(struct ieee80211_node *ni,
2407 const struct ieee80211_frame *wh,
2408 const uint8_t *frm, const uint8_t *efrm)
2409 {
2410 struct ieee80211vap *vap = ni->ni_vap;
2411 struct ieee80211_meshpeer_ie ie;
2412 const struct ieee80211_meshpeer_ie *meshpeer;
2413 uint16_t args[3];
2414
2415 /* +2+2+2+2 for action + code + capabilites + status code + AID */
2416 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2+2+2, efrm, &ie,
2417 IEEE80211_ACTION_MESHPEERING_CONFIRM);
2418 if (meshpeer == NULL) {
2419 return 0;
2420 }
2421
2422 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2423 "recv PEER CONFIRM, local id 0x%x, peer id 0x%x",
2424 meshpeer->peer_llinkid, meshpeer->peer_linkid);
2425
2426 switch (ni->ni_mlstate) {
2427 case IEEE80211_NODE_MESH_OPENRCV:
2428 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED);
2429 mesh_peer_timeout_stop(ni);
2430 break;
2431 case IEEE80211_NODE_MESH_OPENSNT:
2432 mesh_linkchange(ni, IEEE80211_NODE_MESH_CONFIRMRCV);
2433 mesh_peer_timeout_setup(ni);
2434 break;
2435 case IEEE80211_NODE_MESH_HOLDING:
2436 args[0] = ni->ni_mlpid;
2437 args[1] = meshpeer->peer_llinkid;
2438 /* Standard not clear about what the reaason code should be */
2439 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2440 ieee80211_send_action(ni,
2441 IEEE80211_ACTION_CAT_SELF_PROT,
2442 IEEE80211_ACTION_MESHPEERING_CLOSE,
2443 args);
2444 break;
2445 case IEEE80211_NODE_MESH_CONFIRMRCV:
2446 if (ni->ni_mllid != meshpeer->peer_llinkid) {
2447 args[0] = ni->ni_mlpid;
2448 args[1] = ni->ni_mllid;
2449 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2450 ieee80211_send_action(ni,
2451 IEEE80211_ACTION_CAT_SELF_PROT,
2452 IEEE80211_ACTION_MESHPEERING_CLOSE,
2453 args);
2454 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2455 mesh_peer_timeout_setup(ni);
2456 }
2457 break;
2458 default:
2459 IEEE80211_DISCARD(vap,
2460 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2461 wh, NULL, "received confirm in invalid state %d",
2462 ni->ni_mlstate);
2463 vap->iv_stats.is_rx_mgtdiscard++;
2464 break;
2465 }
2466 return 0;
2467 }
2468
2469 static int
mesh_recv_action_meshpeering_close(struct ieee80211_node * ni,const struct ieee80211_frame * wh,const uint8_t * frm,const uint8_t * efrm)2470 mesh_recv_action_meshpeering_close(struct ieee80211_node *ni,
2471 const struct ieee80211_frame *wh,
2472 const uint8_t *frm, const uint8_t *efrm)
2473 {
2474 struct ieee80211_meshpeer_ie ie;
2475 const struct ieee80211_meshpeer_ie *meshpeer;
2476 uint16_t args[3];
2477
2478 /* +2 for action + code */
2479 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2, efrm, &ie,
2480 IEEE80211_ACTION_MESHPEERING_CLOSE);
2481 if (meshpeer == NULL) {
2482 return 0;
2483 }
2484
2485 /*
2486 * XXX: check reason code, for example we could receive
2487 * IEEE80211_REASON_MESH_MAX_PEERS then we should not attempt
2488 * to peer again.
2489 */
2490
2491 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2492 ni, "%s", "recv PEER CLOSE");
2493
2494 switch (ni->ni_mlstate) {
2495 case IEEE80211_NODE_MESH_IDLE:
2496 /* ignore */
2497 break;
2498 case IEEE80211_NODE_MESH_OPENRCV:
2499 case IEEE80211_NODE_MESH_OPENSNT:
2500 case IEEE80211_NODE_MESH_CONFIRMRCV:
2501 case IEEE80211_NODE_MESH_ESTABLISHED:
2502 args[0] = ni->ni_mlpid;
2503 args[1] = ni->ni_mllid;
2504 args[2] = IEEE80211_REASON_MESH_CLOSE_RCVD;
2505 ieee80211_send_action(ni,
2506 IEEE80211_ACTION_CAT_SELF_PROT,
2507 IEEE80211_ACTION_MESHPEERING_CLOSE,
2508 args);
2509 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2510 mesh_peer_timeout_setup(ni);
2511 break;
2512 case IEEE80211_NODE_MESH_HOLDING:
2513 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE);
2514 mesh_peer_timeout_stop(ni);
2515 break;
2516 }
2517 return 0;
2518 }
2519
2520 /*
2521 * Link Metric handling.
2522 */
2523 static int
mesh_recv_action_meshlmetric(struct ieee80211_node * ni,const struct ieee80211_frame * wh,const uint8_t * frm,const uint8_t * efrm)2524 mesh_recv_action_meshlmetric(struct ieee80211_node *ni,
2525 const struct ieee80211_frame *wh,
2526 const uint8_t *frm, const uint8_t *efrm)
2527 {
2528 const struct ieee80211_meshlmetric_ie *ie =
2529 (const struct ieee80211_meshlmetric_ie *)
2530 (frm+2); /* action + code */
2531 struct ieee80211_meshlmetric_ie lm_rep;
2532
2533 if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) {
2534 lm_rep.lm_flags = 0;
2535 lm_rep.lm_metric = mesh_airtime_calc(ni);
2536 ieee80211_send_action(ni,
2537 IEEE80211_ACTION_CAT_MESH,
2538 IEEE80211_ACTION_MESH_LMETRIC,
2539 &lm_rep);
2540 }
2541 /* XXX: else do nothing for now */
2542 return 0;
2543 }
2544
2545 /*
2546 * Parse meshgate action ie's for GANN frames.
2547 * Returns -1 if parsing fails, otherwise 0.
2548 */
2549 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)2550 mesh_parse_meshgate_action(struct ieee80211_node *ni,
2551 const struct ieee80211_frame *wh, /* XXX for VERIFY_LENGTH */
2552 struct ieee80211_meshgann_ie *ie, const uint8_t *frm, const uint8_t *efrm)
2553 {
2554 struct ieee80211vap *vap = ni->ni_vap;
2555 const struct ieee80211_meshgann_ie *gannie;
2556
2557 while (efrm - frm > 1) {
2558 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return -1);
2559 switch (*frm) {
2560 case IEEE80211_ELEMID_MESHGANN:
2561 gannie = (const struct ieee80211_meshgann_ie *) frm;
2562 memset(ie, 0, sizeof(*ie));
2563 ie->gann_ie = gannie->gann_ie;
2564 ie->gann_len = gannie->gann_len;
2565 ie->gann_flags = gannie->gann_flags;
2566 ie->gann_hopcount = gannie->gann_hopcount;
2567 ie->gann_ttl = gannie->gann_ttl;
2568 IEEE80211_ADDR_COPY(ie->gann_addr, gannie->gann_addr);
2569 ie->gann_seq = LE_READ_4(&gannie->gann_seq);
2570 ie->gann_interval = LE_READ_2(&gannie->gann_interval);
2571 break;
2572 }
2573 frm += frm[1] + 2;
2574 }
2575
2576 return 0;
2577 }
2578
2579 /*
2580 * Mesh Gate Announcement handling.
2581 */
2582 static int
mesh_recv_action_meshgate(struct ieee80211_node * ni,const struct ieee80211_frame * wh,const uint8_t * frm,const uint8_t * efrm)2583 mesh_recv_action_meshgate(struct ieee80211_node *ni,
2584 const struct ieee80211_frame *wh,
2585 const uint8_t *frm, const uint8_t *efrm)
2586 {
2587 struct ieee80211vap *vap = ni->ni_vap;
2588 struct ieee80211_mesh_state *ms = vap->iv_mesh;
2589 struct ieee80211_mesh_gate_route *gr, *next;
2590 struct ieee80211_mesh_route *rt_gate;
2591 struct ieee80211_meshgann_ie pgann;
2592 struct ieee80211_meshgann_ie ie;
2593 int found = 0;
2594
2595 /* +2 for action + code */
2596 if (mesh_parse_meshgate_action(ni, wh, &ie, frm+2, efrm) != 0) {
2597 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
2598 ni->ni_macaddr, NULL, "%s",
2599 "GANN parsing failed");
2600 vap->iv_stats.is_rx_mgtdiscard++;
2601 return (0);
2602 }
2603
2604 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ie.gann_addr))
2605 return 0;
2606
2607 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ni->ni_macaddr,
2608 "received GANN, meshgate: %6D (seq %u)", ie.gann_addr, ":",
2609 ie.gann_seq);
2610
2611 if (ms == NULL)
2612 return (0);
2613 MESH_RT_LOCK(ms);
2614 TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) {
2615 if (!IEEE80211_ADDR_EQ(gr->gr_addr, ie.gann_addr))
2616 continue;
2617 if (ie.gann_seq <= gr->gr_lastseq) {
2618 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
2619 ni->ni_macaddr, NULL,
2620 "GANN old seqno %u <= %u",
2621 ie.gann_seq, gr->gr_lastseq);
2622 MESH_RT_UNLOCK(ms);
2623 return (0);
2624 }
2625 /* corresponding mesh gate found & GANN accepted */
2626 found = 1;
2627 break;
2628
2629 }
2630 if (found == 0) {
2631 /* this GANN is from a new mesh Gate add it to known table. */
2632 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie.gann_addr,
2633 "stored new GANN information, seq %u.", ie.gann_seq);
2634 gr = IEEE80211_MALLOC(ALIGN(sizeof(struct ieee80211_mesh_gate_route)),
2635 M_80211_MESH_GT_RT,
2636 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
2637 IEEE80211_ADDR_COPY(gr->gr_addr, ie.gann_addr);
2638 TAILQ_INSERT_TAIL(&ms->ms_known_gates, gr, gr_next);
2639 }
2640 gr->gr_lastseq = ie.gann_seq;
2641
2642 /* check if we have a path to this gate */
2643 rt_gate = mesh_rt_find_locked(ms, gr->gr_addr);
2644 if (rt_gate != NULL &&
2645 rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) {
2646 gr->gr_route = rt_gate;
2647 rt_gate->rt_flags |= IEEE80211_MESHRT_FLAGS_GATE;
2648 }
2649
2650 MESH_RT_UNLOCK(ms);
2651
2652 /* popagate only if decremented ttl >= 1 && forwarding is enabled */
2653 if ((ie.gann_ttl - 1) < 1 && !(ms->ms_flags & IEEE80211_MESHFLAGS_FWD))
2654 return 0;
2655 pgann.gann_flags = ie.gann_flags; /* Reserved */
2656 pgann.gann_hopcount = ie.gann_hopcount + 1;
2657 pgann.gann_ttl = ie.gann_ttl - 1;
2658 IEEE80211_ADDR_COPY(pgann.gann_addr, ie.gann_addr);
2659 pgann.gann_seq = ie.gann_seq;
2660 pgann.gann_interval = ie.gann_interval;
2661
2662 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie.gann_addr,
2663 "%s", "propagate GANN");
2664
2665 ieee80211_send_action(vap->iv_bss, IEEE80211_ACTION_CAT_MESH,
2666 IEEE80211_ACTION_MESH_GANN, &pgann);
2667
2668 return 0;
2669 }
2670
2671 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)2672 mesh_send_action(struct ieee80211_node *ni,
2673 const uint8_t sa[IEEE80211_ADDR_LEN],
2674 const uint8_t da[IEEE80211_ADDR_LEN],
2675 struct mbuf *m)
2676 {
2677 struct ieee80211vap *vap = ni->ni_vap;
2678 struct ieee80211com *ic = ni->ni_ic;
2679 struct ieee80211_bpf_params params;
2680 struct ieee80211_frame *wh;
2681 int ret;
2682
2683 KASSERT(ni != NULL, ("null node"));
2684
2685 if (vap->iv_state == IEEE80211_S_CAC) {
2686 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT, ni,
2687 "block %s frame in CAC state", "Mesh action");
2688 vap->iv_stats.is_tx_badstate++;
2689 ieee80211_free_node(ni);
2690 m_freem(m);
2691 return EIO; /* XXX */
2692 }
2693
2694 M_PREPEND(m, sizeof(struct ieee80211_frame), M_NOWAIT);
2695 if (m == NULL) {
2696 ieee80211_free_node(ni);
2697 return ENOMEM;
2698 }
2699
2700 IEEE80211_TX_LOCK(ic);
2701 wh = mtod(m, struct ieee80211_frame *);
2702 ieee80211_send_setup(ni, m,
2703 IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_ACTION,
2704 IEEE80211_NONQOS_TID, sa, da, sa);
2705 m->m_flags |= M_ENCAP; /* mark encapsulated */
2706
2707 memset(¶ms, 0, sizeof(params));
2708 params.ibp_pri = WME_AC_VO;
2709 params.ibp_rate0 = ni->ni_txparms->mgmtrate;
2710 if (IEEE80211_IS_MULTICAST(da))
2711 params.ibp_try0 = 1;
2712 else
2713 params.ibp_try0 = ni->ni_txparms->maxretry;
2714 params.ibp_power = ni->ni_txpower;
2715
2716 IEEE80211_NODE_STAT(ni, tx_mgmt);
2717
2718 ret = ieee80211_raw_output(vap, ni, m, ¶ms);
2719 IEEE80211_TX_UNLOCK(ic);
2720 return (ret);
2721 }
2722
2723 #define ADDSHORT(frm, v) do { \
2724 frm[0] = (v) & 0xff; \
2725 frm[1] = (v) >> 8; \
2726 frm += 2; \
2727 } while (0)
2728 #define ADDWORD(frm, v) do { \
2729 frm[0] = (v) & 0xff; \
2730 frm[1] = ((v) >> 8) & 0xff; \
2731 frm[2] = ((v) >> 16) & 0xff; \
2732 frm[3] = ((v) >> 24) & 0xff; \
2733 frm += 4; \
2734 } while (0)
2735
2736 static int
mesh_send_action_meshpeering_open(struct ieee80211_node * ni,int category,int action,void * args0)2737 mesh_send_action_meshpeering_open(struct ieee80211_node *ni,
2738 int category, int action, void *args0)
2739 {
2740 struct ieee80211vap *vap = ni->ni_vap;
2741 struct ieee80211com *ic = ni->ni_ic;
2742 uint16_t *args = args0;
2743 const struct ieee80211_rateset *rs;
2744 struct mbuf *m;
2745 uint8_t *frm;
2746
2747 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2748 "send PEER OPEN action: localid 0x%x", args[0]);
2749
2750 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2751 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2752 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2753 ieee80211_ref_node(ni);
2754
2755 m = ieee80211_getmgtframe(&frm,
2756 ic->ic_headroom + sizeof(struct ieee80211_frame),
2757 sizeof(uint16_t) /* action+category */
2758 + sizeof(uint16_t) /* capabilites */
2759 + 2 + IEEE80211_RATE_SIZE
2760 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
2761 + 2 + IEEE80211_MESHID_LEN
2762 + sizeof(struct ieee80211_meshconf_ie)
2763 + sizeof(struct ieee80211_meshpeer_ie)
2764 );
2765 if (m != NULL) {
2766 /*
2767 * mesh peer open action frame format:
2768 * [1] category
2769 * [1] action
2770 * [2] capabilities
2771 * [tlv] rates
2772 * [tlv] xrates
2773 * [tlv] mesh id
2774 * [tlv] mesh conf
2775 * [tlv] mesh peer link mgmt
2776 */
2777 *frm++ = category;
2778 *frm++ = action;
2779 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan));
2780 rs = ieee80211_get_suprates(ic, ic->ic_curchan);
2781 frm = ieee80211_add_rates(frm, rs);
2782 frm = ieee80211_add_xrates(frm, rs);
2783 frm = ieee80211_add_meshid(frm, vap);
2784 frm = ieee80211_add_meshconf(frm, vap);
2785 frm = ieee80211_add_meshpeer(frm, IEEE80211_ACTION_MESHPEERING_OPEN,
2786 args[0], 0, 0);
2787 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2788 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m);
2789 } else {
2790 vap->iv_stats.is_tx_nobuf++;
2791 ieee80211_free_node(ni);
2792 return ENOMEM;
2793 }
2794 }
2795
2796 static int
mesh_send_action_meshpeering_confirm(struct ieee80211_node * ni,int category,int action,void * args0)2797 mesh_send_action_meshpeering_confirm(struct ieee80211_node *ni,
2798 int category, int action, void *args0)
2799 {
2800 struct ieee80211vap *vap = ni->ni_vap;
2801 struct ieee80211com *ic = ni->ni_ic;
2802 uint16_t *args = args0;
2803 const struct ieee80211_rateset *rs;
2804 struct mbuf *m;
2805 uint8_t *frm;
2806
2807 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2808 "send PEER CONFIRM action: localid 0x%x, peerid 0x%x",
2809 args[0], args[1]);
2810
2811 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2812 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2813 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2814 ieee80211_ref_node(ni);
2815
2816 m = ieee80211_getmgtframe(&frm,
2817 ic->ic_headroom + sizeof(struct ieee80211_frame),
2818 sizeof(uint16_t) /* action+category */
2819 + sizeof(uint16_t) /* capabilites */
2820 + sizeof(uint16_t) /* status code */
2821 + sizeof(uint16_t) /* AID */
2822 + 2 + IEEE80211_RATE_SIZE
2823 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
2824 + 2 + IEEE80211_MESHID_LEN
2825 + sizeof(struct ieee80211_meshconf_ie)
2826 + sizeof(struct ieee80211_meshpeer_ie)
2827 );
2828 if (m != NULL) {
2829 /*
2830 * mesh peer confirm action frame format:
2831 * [1] category
2832 * [1] action
2833 * [2] capabilities
2834 * [2] status code
2835 * [2] association id (peer ID)
2836 * [tlv] rates
2837 * [tlv] xrates
2838 * [tlv] mesh id
2839 * [tlv] mesh conf
2840 * [tlv] mesh peer link mgmt
2841 */
2842 *frm++ = category;
2843 *frm++ = action;
2844 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan));
2845 ADDSHORT(frm, 0); /* status code */
2846 ADDSHORT(frm, args[1]); /* AID */
2847 rs = ieee80211_get_suprates(ic, ic->ic_curchan);
2848 frm = ieee80211_add_rates(frm, rs);
2849 frm = ieee80211_add_xrates(frm, rs);
2850 frm = ieee80211_add_meshid(frm, vap);
2851 frm = ieee80211_add_meshconf(frm, vap);
2852 frm = ieee80211_add_meshpeer(frm,
2853 IEEE80211_ACTION_MESHPEERING_CONFIRM,
2854 args[0], args[1], 0);
2855 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2856 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m);
2857 } else {
2858 vap->iv_stats.is_tx_nobuf++;
2859 ieee80211_free_node(ni);
2860 return ENOMEM;
2861 }
2862 }
2863
2864 static int
mesh_send_action_meshpeering_close(struct ieee80211_node * ni,int category,int action,void * args0)2865 mesh_send_action_meshpeering_close(struct ieee80211_node *ni,
2866 int category, int action, void *args0)
2867 {
2868 struct ieee80211vap *vap = ni->ni_vap;
2869 struct ieee80211com *ic = ni->ni_ic;
2870 uint16_t *args = args0;
2871 struct mbuf *m;
2872 uint8_t *frm;
2873
2874 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2875 "send PEER CLOSE action: localid 0x%x, peerid 0x%x reason %d",
2876 args[0], args[1], args[2]);
2877
2878 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2879 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2880 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2881 ieee80211_ref_node(ni);
2882
2883 m = ieee80211_getmgtframe(&frm,
2884 ic->ic_headroom + sizeof(struct ieee80211_frame),
2885 sizeof(uint16_t) /* action+category */
2886 + sizeof(uint16_t) /* reason code */
2887 + 2 + IEEE80211_MESHID_LEN
2888 + sizeof(struct ieee80211_meshpeer_ie)
2889 );
2890 if (m != NULL) {
2891 /*
2892 * mesh peer close action frame format:
2893 * [1] category
2894 * [1] action
2895 * [tlv] mesh id
2896 * [tlv] mesh peer link mgmt
2897 */
2898 *frm++ = category;
2899 *frm++ = action;
2900 frm = ieee80211_add_meshid(frm, vap);
2901 frm = ieee80211_add_meshpeer(frm,
2902 IEEE80211_ACTION_MESHPEERING_CLOSE,
2903 args[0], args[1], args[2]);
2904 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2905 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m);
2906 } else {
2907 vap->iv_stats.is_tx_nobuf++;
2908 ieee80211_free_node(ni);
2909 return ENOMEM;
2910 }
2911 }
2912
2913 static int
mesh_send_action_meshlmetric(struct ieee80211_node * ni,int category,int action,void * arg0)2914 mesh_send_action_meshlmetric(struct ieee80211_node *ni,
2915 int category, int action, void *arg0)
2916 {
2917 struct ieee80211vap *vap = ni->ni_vap;
2918 struct ieee80211com *ic = ni->ni_ic;
2919 struct ieee80211_meshlmetric_ie *ie = arg0;
2920 struct mbuf *m;
2921 uint8_t *frm;
2922
2923 if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) {
2924 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2925 ni, "%s", "send LINK METRIC REQUEST action");
2926 } else {
2927 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2928 ni, "send LINK METRIC REPLY action: metric 0x%x",
2929 ie->lm_metric);
2930 }
2931 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2932 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2933 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2934 ieee80211_ref_node(ni);
2935
2936 m = ieee80211_getmgtframe(&frm,
2937 ic->ic_headroom + sizeof(struct ieee80211_frame),
2938 sizeof(uint16_t) + /* action+category */
2939 sizeof(struct ieee80211_meshlmetric_ie)
2940 );
2941 if (m != NULL) {
2942 /*
2943 * mesh link metric
2944 * [1] category
2945 * [1] action
2946 * [tlv] mesh link metric
2947 */
2948 *frm++ = category;
2949 *frm++ = action;
2950 frm = ieee80211_add_meshlmetric(frm,
2951 ie->lm_flags, ie->lm_metric);
2952 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2953 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m);
2954 } else {
2955 vap->iv_stats.is_tx_nobuf++;
2956 ieee80211_free_node(ni);
2957 return ENOMEM;
2958 }
2959 }
2960
2961 static int
mesh_send_action_meshgate(struct ieee80211_node * ni,int category,int action,void * arg0)2962 mesh_send_action_meshgate(struct ieee80211_node *ni,
2963 int category, int action, void *arg0)
2964 {
2965 struct ieee80211vap *vap = ni->ni_vap;
2966 struct ieee80211com *ic = ni->ni_ic;
2967 struct ieee80211_meshgann_ie *ie = arg0;
2968 struct mbuf *m;
2969 uint8_t *frm;
2970
2971 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2972 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2973 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2974 ieee80211_ref_node(ni);
2975
2976 m = ieee80211_getmgtframe(&frm,
2977 ic->ic_headroom + sizeof(struct ieee80211_frame),
2978 sizeof(uint16_t) + /* action+category */
2979 IEEE80211_MESHGANN_BASE_SZ
2980 );
2981 if (m != NULL) {
2982 /*
2983 * mesh link metric
2984 * [1] category
2985 * [1] action
2986 * [tlv] mesh gate annoucement
2987 */
2988 *frm++ = category;
2989 *frm++ = action;
2990 frm = ieee80211_add_meshgate(frm, ie);
2991 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2992 return mesh_send_action(ni, vap->iv_myaddr, broadcastaddr, m);
2993 } else {
2994 vap->iv_stats.is_tx_nobuf++;
2995 ieee80211_free_node(ni);
2996 return ENOMEM;
2997 }
2998 }
2999
3000 static void
mesh_peer_timeout_setup(struct ieee80211_node * ni)3001 mesh_peer_timeout_setup(struct ieee80211_node *ni)
3002 {
3003 switch (ni->ni_mlstate) {
3004 case IEEE80211_NODE_MESH_HOLDING:
3005 ni->ni_mltval = ieee80211_mesh_holdingtimeout;
3006 break;
3007 case IEEE80211_NODE_MESH_CONFIRMRCV:
3008 ni->ni_mltval = ieee80211_mesh_confirmtimeout;
3009 break;
3010 case IEEE80211_NODE_MESH_IDLE:
3011 ni->ni_mltval = 0;
3012 break;
3013 default:
3014 ni->ni_mltval = ieee80211_mesh_retrytimeout;
3015 break;
3016 }
3017 if (ni->ni_mltval)
3018 callout_reset(&ni->ni_mltimer, ni->ni_mltval,
3019 mesh_peer_timeout_cb, ni);
3020 }
3021
3022 /*
3023 * Same as above but backoffs timer statisically 50%.
3024 */
3025 static void
mesh_peer_timeout_backoff(struct ieee80211_node * ni)3026 mesh_peer_timeout_backoff(struct ieee80211_node *ni)
3027 {
3028 uint32_t r;
3029
3030 r = arc4random();
3031 ni->ni_mltval += r % ni->ni_mltval;
3032 callout_reset(&ni->ni_mltimer, ni->ni_mltval, mesh_peer_timeout_cb,
3033 ni);
3034 }
3035
3036 static __inline void
mesh_peer_timeout_stop(struct ieee80211_node * ni)3037 mesh_peer_timeout_stop(struct ieee80211_node *ni)
3038 {
3039 callout_drain(&ni->ni_mltimer);
3040 }
3041
3042 static void
mesh_peer_backoff_cb(void * arg)3043 mesh_peer_backoff_cb(void *arg)
3044 {
3045 struct ieee80211_node *ni = (struct ieee80211_node *)arg;
3046
3047 /* After backoff timeout, try to peer automatically again. */
3048 ni->ni_mlhcnt = 0;
3049 }
3050
3051 /*
3052 * Mesh Peer Link Management FSM timeout handling.
3053 */
3054 static void
mesh_peer_timeout_cb(void * arg)3055 mesh_peer_timeout_cb(void *arg)
3056 {
3057 struct ieee80211_node *ni = (struct ieee80211_node *)arg;
3058 uint16_t args[3];
3059
3060 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_MESH,
3061 ni, "mesh link timeout, state %d, retry counter %d",
3062 ni->ni_mlstate, ni->ni_mlrcnt);
3063
3064 switch (ni->ni_mlstate) {
3065 case IEEE80211_NODE_MESH_IDLE:
3066 case IEEE80211_NODE_MESH_ESTABLISHED:
3067 break;
3068 case IEEE80211_NODE_MESH_OPENSNT:
3069 case IEEE80211_NODE_MESH_OPENRCV:
3070 if (ni->ni_mlrcnt == ieee80211_mesh_maxretries) {
3071 args[0] = ni->ni_mlpid;
3072 args[2] = IEEE80211_REASON_MESH_MAX_RETRIES;
3073 ieee80211_send_action(ni,
3074 IEEE80211_ACTION_CAT_SELF_PROT,
3075 IEEE80211_ACTION_MESHPEERING_CLOSE, args);
3076 ni->ni_mlrcnt = 0;
3077 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
3078 mesh_peer_timeout_setup(ni);
3079 } else {
3080 args[0] = ni->ni_mlpid;
3081 ieee80211_send_action(ni,
3082 IEEE80211_ACTION_CAT_SELF_PROT,
3083 IEEE80211_ACTION_MESHPEERING_OPEN, args);
3084 ni->ni_mlrcnt++;
3085 mesh_peer_timeout_backoff(ni);
3086 }
3087 break;
3088 case IEEE80211_NODE_MESH_CONFIRMRCV:
3089 args[0] = ni->ni_mlpid;
3090 args[2] = IEEE80211_REASON_MESH_CONFIRM_TIMEOUT;
3091 ieee80211_send_action(ni,
3092 IEEE80211_ACTION_CAT_SELF_PROT,
3093 IEEE80211_ACTION_MESHPEERING_CLOSE, args);
3094 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
3095 mesh_peer_timeout_setup(ni);
3096 break;
3097 case IEEE80211_NODE_MESH_HOLDING:
3098 ni->ni_mlhcnt++;
3099 if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding)
3100 callout_reset(&ni->ni_mlhtimer,
3101 ieee80211_mesh_backofftimeout,
3102 mesh_peer_backoff_cb, ni);
3103 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE);
3104 break;
3105 }
3106 }
3107
3108 static int
mesh_verify_meshid(struct ieee80211vap * vap,const uint8_t * ie)3109 mesh_verify_meshid(struct ieee80211vap *vap, const uint8_t *ie)
3110 {
3111 struct ieee80211_mesh_state *ms = vap->iv_mesh;
3112
3113 if (ie == NULL || ie[1] != ms->ms_idlen)
3114 return 1;
3115 return memcmp(ms->ms_id, ie + 2, ms->ms_idlen);
3116 }
3117
3118 /*
3119 * Check if we are using the same algorithms for this mesh.
3120 */
3121 static int
mesh_verify_meshconf(struct ieee80211vap * vap,const uint8_t * ie)3122 mesh_verify_meshconf(struct ieee80211vap *vap, const uint8_t *ie)
3123 {
3124 const struct ieee80211_meshconf_ie *meshconf =
3125 (const struct ieee80211_meshconf_ie *) ie;
3126 const struct ieee80211_mesh_state *ms = vap->iv_mesh;
3127
3128 if (meshconf == NULL)
3129 return 1;
3130 if (meshconf->conf_pselid != ms->ms_ppath->mpp_ie) {
3131 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3132 "unknown path selection algorithm: 0x%x\n",
3133 meshconf->conf_pselid);
3134 return 1;
3135 }
3136 if (meshconf->conf_pmetid != ms->ms_pmetric->mpm_ie) {
3137 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3138 "unknown path metric algorithm: 0x%x\n",
3139 meshconf->conf_pmetid);
3140 return 1;
3141 }
3142 if (meshconf->conf_ccid != 0) {
3143 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3144 "unknown congestion control algorithm: 0x%x\n",
3145 meshconf->conf_ccid);
3146 return 1;
3147 }
3148 if (meshconf->conf_syncid != IEEE80211_MESHCONF_SYNC_NEIGHOFF) {
3149 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3150 "unknown sync algorithm: 0x%x\n",
3151 meshconf->conf_syncid);
3152 return 1;
3153 }
3154 if (meshconf->conf_authid != 0) {
3155 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3156 "unknown auth auth algorithm: 0x%x\n",
3157 meshconf->conf_pselid);
3158 return 1;
3159 }
3160 /* Not accepting peers */
3161 if (!(meshconf->conf_cap & IEEE80211_MESHCONF_CAP_AP)) {
3162 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3163 "not accepting peers: 0x%x\n", meshconf->conf_cap);
3164 return 1;
3165 }
3166 return 0;
3167 }
3168
3169 static int
mesh_verify_meshpeer(struct ieee80211vap * vap,uint8_t subtype,const uint8_t * ie)3170 mesh_verify_meshpeer(struct ieee80211vap *vap, uint8_t subtype,
3171 const uint8_t *ie)
3172 {
3173 const struct ieee80211_meshpeer_ie *meshpeer =
3174 (const struct ieee80211_meshpeer_ie *) ie;
3175
3176 if (meshpeer == NULL ||
3177 meshpeer->peer_len < IEEE80211_MPM_BASE_SZ ||
3178 meshpeer->peer_len > IEEE80211_MPM_MAX_SZ)
3179 return 1;
3180 if (meshpeer->peer_proto != IEEE80211_MPPID_MPM) {
3181 IEEE80211_DPRINTF(vap,
3182 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
3183 "Only MPM protocol is supported (proto: 0x%02X)",
3184 meshpeer->peer_proto);
3185 return 1;
3186 }
3187 switch (subtype) {
3188 case IEEE80211_ACTION_MESHPEERING_OPEN:
3189 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ)
3190 return 1;
3191 break;
3192 case IEEE80211_ACTION_MESHPEERING_CONFIRM:
3193 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ + 2)
3194 return 1;
3195 break;
3196 case IEEE80211_ACTION_MESHPEERING_CLOSE:
3197 if (meshpeer->peer_len < IEEE80211_MPM_BASE_SZ + 2)
3198 return 1;
3199 if (meshpeer->peer_len == (IEEE80211_MPM_BASE_SZ + 2) &&
3200 meshpeer->peer_linkid != 0)
3201 return 1;
3202 if (meshpeer->peer_rcode == 0)
3203 return 1;
3204 break;
3205 }
3206 return 0;
3207 }
3208
3209 /*
3210 * Add a Mesh ID IE to a frame.
3211 */
3212 uint8_t *
ieee80211_add_meshid(uint8_t * frm,struct ieee80211vap * vap)3213 ieee80211_add_meshid(uint8_t *frm, struct ieee80211vap *vap)
3214 {
3215 struct ieee80211_mesh_state *ms = vap->iv_mesh;
3216
3217 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a mbss vap"));
3218
3219 *frm++ = IEEE80211_ELEMID_MESHID;
3220 *frm++ = ms->ms_idlen;
3221 memcpy(frm, ms->ms_id, ms->ms_idlen);
3222 return frm + ms->ms_idlen;
3223 }
3224
3225 /*
3226 * Add a Mesh Configuration IE to a frame.
3227 * For now just use HWMP routing, Airtime link metric, Null Congestion
3228 * Signaling, Null Sync Protocol and Null Authentication.
3229 */
3230 uint8_t *
ieee80211_add_meshconf(uint8_t * frm,struct ieee80211vap * vap)3231 ieee80211_add_meshconf(uint8_t *frm, struct ieee80211vap *vap)
3232 {
3233 const struct ieee80211_mesh_state *ms = vap->iv_mesh;
3234 uint16_t caps;
3235
3236 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap"));
3237
3238 *frm++ = IEEE80211_ELEMID_MESHCONF;
3239 *frm++ = IEEE80211_MESH_CONF_SZ;
3240 *frm++ = ms->ms_ppath->mpp_ie; /* path selection */
3241 *frm++ = ms->ms_pmetric->mpm_ie; /* link metric */
3242 *frm++ = IEEE80211_MESHCONF_CC_DISABLED;
3243 *frm++ = IEEE80211_MESHCONF_SYNC_NEIGHOFF;
3244 *frm++ = IEEE80211_MESHCONF_AUTH_DISABLED;
3245 /* NB: set the number of neighbors before the rest */
3246 *frm = (ms->ms_neighbors > IEEE80211_MESH_MAX_NEIGHBORS ?
3247 IEEE80211_MESH_MAX_NEIGHBORS : ms->ms_neighbors) << 1;
3248 if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE)
3249 *frm |= IEEE80211_MESHCONF_FORM_GATE;
3250 frm += 1;
3251 caps = 0;
3252 if (ms->ms_flags & IEEE80211_MESHFLAGS_AP)
3253 caps |= IEEE80211_MESHCONF_CAP_AP;
3254 if (ms->ms_flags & IEEE80211_MESHFLAGS_FWD)
3255 caps |= IEEE80211_MESHCONF_CAP_FWRD;
3256 *frm++ = caps;
3257 return frm;
3258 }
3259
3260 /*
3261 * Add a Mesh Peer Management IE to a frame.
3262 */
3263 uint8_t *
ieee80211_add_meshpeer(uint8_t * frm,uint8_t subtype,uint16_t localid,uint16_t peerid,uint16_t reason)3264 ieee80211_add_meshpeer(uint8_t *frm, uint8_t subtype, uint16_t localid,
3265 uint16_t peerid, uint16_t reason)
3266 {
3267
3268 KASSERT(localid != 0, ("localid == 0"));
3269
3270 *frm++ = IEEE80211_ELEMID_MESHPEER;
3271 switch (subtype) {
3272 case IEEE80211_ACTION_MESHPEERING_OPEN:
3273 *frm++ = IEEE80211_MPM_BASE_SZ; /* length */
3274 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */
3275 ADDSHORT(frm, localid); /* local ID */
3276 break;
3277 case IEEE80211_ACTION_MESHPEERING_CONFIRM:
3278 KASSERT(peerid != 0, ("sending peer confirm without peer id"));
3279 *frm++ = IEEE80211_MPM_BASE_SZ + 2; /* length */
3280 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */
3281 ADDSHORT(frm, localid); /* local ID */
3282 ADDSHORT(frm, peerid); /* peer ID */
3283 break;
3284 case IEEE80211_ACTION_MESHPEERING_CLOSE:
3285 if (peerid)
3286 *frm++ = IEEE80211_MPM_MAX_SZ; /* length */
3287 else
3288 *frm++ = IEEE80211_MPM_BASE_SZ + 2; /* length */
3289 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */
3290 ADDSHORT(frm, localid); /* local ID */
3291 if (peerid)
3292 ADDSHORT(frm, peerid); /* peer ID */
3293 ADDSHORT(frm, reason);
3294 break;
3295 }
3296 return frm;
3297 }
3298
3299 /*
3300 * Compute an Airtime Link Metric for the link with this node.
3301 *
3302 * Based on Draft 3.0 spec (11B.10, p.149).
3303 */
3304 /*
3305 * Max 802.11s overhead.
3306 */
3307 #define IEEE80211_MESH_MAXOVERHEAD \
3308 (sizeof(struct ieee80211_qosframe_addr4) \
3309 + sizeof(struct ieee80211_meshcntl_ae10) \
3310 + sizeof(struct llc) \
3311 + IEEE80211_ADDR_LEN \
3312 + IEEE80211_WEP_IVLEN \
3313 + IEEE80211_WEP_KIDLEN \
3314 + IEEE80211_WEP_CRCLEN \
3315 + IEEE80211_WEP_MICLEN \
3316 + IEEE80211_CRC_LEN)
3317 uint32_t
mesh_airtime_calc(struct ieee80211_node * ni)3318 mesh_airtime_calc(struct ieee80211_node *ni)
3319 {
3320 #define M_BITS 8
3321 #define S_FACTOR (2 * M_BITS)
3322 struct ieee80211com *ic = ni->ni_ic;
3323 struct ifnet *ifp = ni->ni_vap->iv_ifp;
3324 const static int nbits = 8192 << M_BITS;
3325 uint32_t overhead, rate, errrate;
3326 uint64_t res;
3327
3328 /* Time to transmit a frame */
3329 rate = ni->ni_txrate;
3330 overhead = ieee80211_compute_duration(ic->ic_rt,
3331 ifp->if_mtu + IEEE80211_MESH_MAXOVERHEAD, rate, 0) << M_BITS;
3332 /* Error rate in percentage */
3333 /* XXX assuming small failures are ok */
3334 errrate = (((ifp->if_get_counter(ifp, IFCOUNTER_OERRORS) +
3335 ifp->if_get_counter(ifp, IFCOUNTER_IERRORS)) / 100) << M_BITS)
3336 / 100;
3337 res = (overhead + (nbits / rate)) *
3338 ((1 << S_FACTOR) / ((1 << M_BITS) - errrate));
3339
3340 return (uint32_t)(res >> S_FACTOR);
3341 #undef M_BITS
3342 #undef S_FACTOR
3343 }
3344
3345 /*
3346 * Add a Mesh Link Metric report IE to a frame.
3347 */
3348 uint8_t *
ieee80211_add_meshlmetric(uint8_t * frm,uint8_t flags,uint32_t metric)3349 ieee80211_add_meshlmetric(uint8_t *frm, uint8_t flags, uint32_t metric)
3350 {
3351 *frm++ = IEEE80211_ELEMID_MESHLINK;
3352 *frm++ = 5;
3353 *frm++ = flags;
3354 ADDWORD(frm, metric);
3355 return frm;
3356 }
3357
3358 /*
3359 * Add a Mesh Gate Announcement IE to a frame.
3360 */
3361 uint8_t *
ieee80211_add_meshgate(uint8_t * frm,struct ieee80211_meshgann_ie * ie)3362 ieee80211_add_meshgate(uint8_t *frm, struct ieee80211_meshgann_ie *ie)
3363 {
3364 *frm++ = IEEE80211_ELEMID_MESHGANN; /* ie */
3365 *frm++ = IEEE80211_MESHGANN_BASE_SZ; /* len */
3366 *frm++ = ie->gann_flags;
3367 *frm++ = ie->gann_hopcount;
3368 *frm++ = ie->gann_ttl;
3369 IEEE80211_ADDR_COPY(frm, ie->gann_addr);
3370 frm += 6;
3371 ADDWORD(frm, ie->gann_seq);
3372 ADDSHORT(frm, ie->gann_interval);
3373 return frm;
3374 }
3375 #undef ADDSHORT
3376 #undef ADDWORD
3377
3378 /*
3379 * Initialize any mesh-specific node state.
3380 */
3381 void
ieee80211_mesh_node_init(struct ieee80211vap * vap,struct ieee80211_node * ni)3382 ieee80211_mesh_node_init(struct ieee80211vap *vap, struct ieee80211_node *ni)
3383 {
3384 ni->ni_flags |= IEEE80211_NODE_QOS;
3385 callout_init(&ni->ni_mltimer, 1);
3386 callout_init(&ni->ni_mlhtimer, 1);
3387 }
3388
3389 /*
3390 * Cleanup any mesh-specific node state.
3391 */
3392 void
ieee80211_mesh_node_cleanup(struct ieee80211_node * ni)3393 ieee80211_mesh_node_cleanup(struct ieee80211_node *ni)
3394 {
3395 struct ieee80211vap *vap = ni->ni_vap;
3396 struct ieee80211_mesh_state *ms = vap->iv_mesh;
3397
3398 callout_drain(&ni->ni_mltimer);
3399 callout_drain(&ni->ni_mlhtimer);
3400 /* NB: short-circuit callbacks after mesh_vdetach */
3401 if (vap->iv_mesh != NULL)
3402 ms->ms_ppath->mpp_peerdown(ni);
3403 }
3404
3405 void
ieee80211_parse_meshid(struct ieee80211_node * ni,const uint8_t * ie)3406 ieee80211_parse_meshid(struct ieee80211_node *ni, const uint8_t *ie)
3407 {
3408 ni->ni_meshidlen = ie[1];
3409 memcpy(ni->ni_meshid, ie + 2, ie[1]);
3410 }
3411
3412 /*
3413 * Setup mesh-specific node state on neighbor discovery.
3414 */
3415 void
ieee80211_mesh_init_neighbor(struct ieee80211_node * ni,const struct ieee80211_frame * wh,const struct ieee80211_scanparams * sp)3416 ieee80211_mesh_init_neighbor(struct ieee80211_node *ni,
3417 const struct ieee80211_frame *wh,
3418 const struct ieee80211_scanparams *sp)
3419 {
3420 ieee80211_parse_meshid(ni, sp->meshid);
3421 }
3422
3423 void
ieee80211_mesh_update_beacon(struct ieee80211vap * vap,struct ieee80211_beacon_offsets * bo)3424 ieee80211_mesh_update_beacon(struct ieee80211vap *vap,
3425 struct ieee80211_beacon_offsets *bo)
3426 {
3427 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap"));
3428
3429 if (isset(bo->bo_flags, IEEE80211_BEACON_MESHCONF)) {
3430 (void)ieee80211_add_meshconf(bo->bo_meshconf, vap);
3431 clrbit(bo->bo_flags, IEEE80211_BEACON_MESHCONF);
3432 }
3433 }
3434
3435 static int
mesh_ioctl_get80211(struct ieee80211vap * vap,struct ieee80211req * ireq)3436 mesh_ioctl_get80211(struct ieee80211vap *vap, struct ieee80211req *ireq)
3437 {
3438 struct ieee80211_mesh_state *ms = vap->iv_mesh;
3439 uint8_t tmpmeshid[IEEE80211_NWID_LEN];
3440 struct ieee80211_mesh_route *rt;
3441 struct ieee80211req_mesh_route *imr;
3442 size_t len, off;
3443 uint8_t *p;
3444 int error;
3445
3446 if (vap->iv_opmode != IEEE80211_M_MBSS)
3447 return ENOSYS;
3448
3449 error = 0;
3450 switch (ireq->i_type) {
3451 case IEEE80211_IOC_MESH_ID:
3452 ireq->i_len = ms->ms_idlen;
3453 memcpy(tmpmeshid, ms->ms_id, ireq->i_len);
3454 error = copyout(tmpmeshid, ireq->i_data, ireq->i_len);
3455 break;
3456 case IEEE80211_IOC_MESH_AP:
3457 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_AP) != 0;
3458 break;
3459 case IEEE80211_IOC_MESH_FWRD:
3460 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) != 0;
3461 break;
3462 case IEEE80211_IOC_MESH_GATE:
3463 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) != 0;
3464 break;
3465 case IEEE80211_IOC_MESH_TTL:
3466 ireq->i_val = ms->ms_ttl;
3467 break;
3468 case IEEE80211_IOC_MESH_RTCMD:
3469 switch (ireq->i_val) {
3470 case IEEE80211_MESH_RTCMD_LIST:
3471 len = 0;
3472 MESH_RT_LOCK(ms);
3473 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) {
3474 len += sizeof(*imr);
3475 }
3476 MESH_RT_UNLOCK(ms);
3477 if (len > ireq->i_len || ireq->i_len < sizeof(*imr)) {
3478 ireq->i_len = len;
3479 return ENOMEM;
3480 }
3481 ireq->i_len = len;
3482 /* XXX M_WAIT? */
3483 p = IEEE80211_MALLOC(len, M_TEMP,
3484 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
3485 if (p == NULL)
3486 return ENOMEM;
3487 off = 0;
3488 MESH_RT_LOCK(ms);
3489 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) {
3490 if (off >= len)
3491 break;
3492 imr = (struct ieee80211req_mesh_route *)
3493 (p + off);
3494 IEEE80211_ADDR_COPY(imr->imr_dest,
3495 rt->rt_dest);
3496 IEEE80211_ADDR_COPY(imr->imr_nexthop,
3497 rt->rt_nexthop);
3498 imr->imr_metric = rt->rt_metric;
3499 imr->imr_nhops = rt->rt_nhops;
3500 imr->imr_lifetime =
3501 ieee80211_mesh_rt_update(rt, 0);
3502 imr->imr_lastmseq = rt->rt_lastmseq;
3503 imr->imr_flags = rt->rt_flags; /* last */
3504 off += sizeof(*imr);
3505 }
3506 MESH_RT_UNLOCK(ms);
3507 error = copyout(p, (uint8_t *)ireq->i_data,
3508 ireq->i_len);
3509 IEEE80211_FREE(p, M_TEMP);
3510 break;
3511 case IEEE80211_MESH_RTCMD_FLUSH:
3512 case IEEE80211_MESH_RTCMD_ADD:
3513 case IEEE80211_MESH_RTCMD_DELETE:
3514 return EINVAL;
3515 default:
3516 return ENOSYS;
3517 }
3518 break;
3519 case IEEE80211_IOC_MESH_PR_METRIC:
3520 len = strlen(ms->ms_pmetric->mpm_descr);
3521 if (ireq->i_len < len)
3522 return EINVAL;
3523 ireq->i_len = len;
3524 error = copyout(ms->ms_pmetric->mpm_descr,
3525 (uint8_t *)ireq->i_data, len);
3526 break;
3527 case IEEE80211_IOC_MESH_PR_PATH:
3528 len = strlen(ms->ms_ppath->mpp_descr);
3529 if (ireq->i_len < len)
3530 return EINVAL;
3531 ireq->i_len = len;
3532 error = copyout(ms->ms_ppath->mpp_descr,
3533 (uint8_t *)ireq->i_data, len);
3534 break;
3535 default:
3536 return ENOSYS;
3537 }
3538
3539 return error;
3540 }
3541 IEEE80211_IOCTL_GET(mesh, mesh_ioctl_get80211);
3542
3543 static int
mesh_ioctl_set80211(struct ieee80211vap * vap,struct ieee80211req * ireq)3544 mesh_ioctl_set80211(struct ieee80211vap *vap, struct ieee80211req *ireq)
3545 {
3546 struct ieee80211_mesh_state *ms = vap->iv_mesh;
3547 uint8_t tmpmeshid[IEEE80211_NWID_LEN];
3548 uint8_t tmpaddr[IEEE80211_ADDR_LEN];
3549 char tmpproto[IEEE80211_MESH_PROTO_DSZ];
3550 int error;
3551
3552 if (vap->iv_opmode != IEEE80211_M_MBSS)
3553 return ENOSYS;
3554
3555 error = 0;
3556 switch (ireq->i_type) {
3557 case IEEE80211_IOC_MESH_ID:
3558 if (ireq->i_val != 0 || ireq->i_len > IEEE80211_MESHID_LEN)
3559 return EINVAL;
3560 error = copyin(ireq->i_data, tmpmeshid, ireq->i_len);
3561 if (error != 0)
3562 break;
3563 memset(ms->ms_id, 0, IEEE80211_NWID_LEN);
3564 ms->ms_idlen = ireq->i_len;
3565 memcpy(ms->ms_id, tmpmeshid, ireq->i_len);
3566 error = ENETRESET;
3567 break;
3568 case IEEE80211_IOC_MESH_AP:
3569 if (ireq->i_val)
3570 ms->ms_flags |= IEEE80211_MESHFLAGS_AP;
3571 else
3572 ms->ms_flags &= ~IEEE80211_MESHFLAGS_AP;
3573 error = ENETRESET;
3574 break;
3575 case IEEE80211_IOC_MESH_FWRD:
3576 if (ireq->i_val)
3577 ms->ms_flags |= IEEE80211_MESHFLAGS_FWD;
3578 else
3579 ms->ms_flags &= ~IEEE80211_MESHFLAGS_FWD;
3580 mesh_gatemode_setup(vap);
3581 break;
3582 case IEEE80211_IOC_MESH_GATE:
3583 if (ireq->i_val)
3584 ms->ms_flags |= IEEE80211_MESHFLAGS_GATE;
3585 else
3586 ms->ms_flags &= ~IEEE80211_MESHFLAGS_GATE;
3587 break;
3588 case IEEE80211_IOC_MESH_TTL:
3589 ms->ms_ttl = (uint8_t) ireq->i_val;
3590 break;
3591 case IEEE80211_IOC_MESH_RTCMD:
3592 switch (ireq->i_val) {
3593 case IEEE80211_MESH_RTCMD_LIST:
3594 return EINVAL;
3595 case IEEE80211_MESH_RTCMD_FLUSH:
3596 ieee80211_mesh_rt_flush(vap);
3597 break;
3598 case IEEE80211_MESH_RTCMD_ADD:
3599 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ireq->i_data) ||
3600 IEEE80211_ADDR_EQ(broadcastaddr, ireq->i_data))
3601 return EINVAL;
3602 error = copyin(ireq->i_data, &tmpaddr,
3603 IEEE80211_ADDR_LEN);
3604 if (error == 0)
3605 ieee80211_mesh_discover(vap, tmpaddr, NULL);
3606 break;
3607 case IEEE80211_MESH_RTCMD_DELETE:
3608 ieee80211_mesh_rt_del(vap, ireq->i_data);
3609 break;
3610 default:
3611 return ENOSYS;
3612 }
3613 break;
3614 case IEEE80211_IOC_MESH_PR_METRIC:
3615 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto));
3616 if (error == 0) {
3617 error = mesh_select_proto_metric(vap, tmpproto);
3618 if (error == 0)
3619 error = ENETRESET;
3620 }
3621 break;
3622 case IEEE80211_IOC_MESH_PR_PATH:
3623 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto));
3624 if (error == 0) {
3625 error = mesh_select_proto_path(vap, tmpproto);
3626 if (error == 0)
3627 error = ENETRESET;
3628 }
3629 break;
3630 default:
3631 return ENOSYS;
3632 }
3633 return error;
3634 }
3635 IEEE80211_IOCTL_SET(mesh, mesh_ioctl_set80211);
3636