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indent: Avoid using values of pointers that refer to deallocated space.
[freebsd-src.git] / sys / net80211 / ieee80211_mesh.c
blobc8e69b7423828c2674c05098ac3b6a19f0fbeca9
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 *
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 *
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 *
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 *
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
606 ieee80211_mesh_attach(struct ieee80211com *ic)
607 {
608 ic->ic_vattach[IEEE80211_M_MBSS] = mesh_vattach;
609 }
610
611 void
612 ieee80211_mesh_detach(struct ieee80211com *ic)
613 {
614 }
615
616 static void
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
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
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
688 mesh_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
689 {
690 struct ieee80211_mesh_state *ms = vap->iv_mesh;
691 struct ieee80211com *ic = vap->iv_ic;
692 struct ieee80211_node *ni;
693 enum ieee80211_state ostate;
694
695 IEEE80211_LOCK_ASSERT(ic);
696
697 ostate = vap->iv_state;
698 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n",
699 __func__, ieee80211_state_name[ostate],
700 ieee80211_state_name[nstate], arg);
701 vap->iv_state = nstate; /* state transition */
702 if (ostate != IEEE80211_S_SCAN)
703 ieee80211_cancel_scan(vap); /* background scan */
704 ni = vap->iv_bss; /* NB: no reference held */
705 if (nstate != IEEE80211_S_RUN && ostate == IEEE80211_S_RUN) {
706 callout_drain(&ms->ms_cleantimer);
707 callout_drain(&ms->ms_gatetimer);
708 }
709 switch (nstate) {
710 case IEEE80211_S_INIT:
711 switch (ostate) {
712 case IEEE80211_S_SCAN:
713 ieee80211_cancel_scan(vap);
714 break;
715 case IEEE80211_S_CAC:
716 ieee80211_dfs_cac_stop(vap);
717 break;
718 case IEEE80211_S_RUN:
719 ieee80211_iterate_nodes(&ic->ic_sta,
720 mesh_vdetach_peers, NULL);
721 break;
722 default:
723 break;
724 }
725 if (ostate != IEEE80211_S_INIT) {
726 /* NB: optimize INIT -> INIT case */
727 ieee80211_reset_bss(vap);
728 ieee80211_mesh_rt_flush(vap);
729 }
730 break;
731 case IEEE80211_S_SCAN:
732 switch (ostate) {
733 case IEEE80211_S_INIT:
734 if (vap->iv_des_chan != IEEE80211_CHAN_ANYC &&
735 !IEEE80211_IS_CHAN_RADAR(vap->iv_des_chan) &&
736 ms->ms_idlen != 0) {
737 /*
738 * Already have a channel and a mesh ID; bypass
739 * the scan and startup immediately.
740 */
741 ieee80211_create_ibss(vap, vap->iv_des_chan);
742 break;
743 }
744 /*
745 * Initiate a scan. We can come here as a result
746 * of an IEEE80211_IOC_SCAN_REQ too in which case
747 * the vap will be marked with IEEE80211_FEXT_SCANREQ
748 * and the scan request parameters will be present
749 * in iv_scanreq. Otherwise we do the default.
750 */
751 if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) {
752 ieee80211_check_scan(vap,
753 vap->iv_scanreq_flags,
754 vap->iv_scanreq_duration,
755 vap->iv_scanreq_mindwell,
756 vap->iv_scanreq_maxdwell,
757 vap->iv_scanreq_nssid, vap->iv_scanreq_ssid);
758 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ;
759 } else
760 ieee80211_check_scan_current(vap);
761 break;
762 default:
763 break;
764 }
765 break;
766 case IEEE80211_S_CAC:
767 /*
768 * Start CAC on a DFS channel. We come here when starting
769 * a bss on a DFS channel (see ieee80211_create_ibss).
770 */
771 ieee80211_dfs_cac_start(vap);
772 break;
773 case IEEE80211_S_RUN:
774 switch (ostate) {
775 case IEEE80211_S_INIT:
776 /*
777 * Already have a channel; bypass the
778 * scan and startup immediately.
779 * Note that ieee80211_create_ibss will call
780 * back to do a RUN->RUN state change.
781 */
782 ieee80211_create_ibss(vap,
783 ieee80211_ht_adjust_channel(ic,
784 ic->ic_curchan, vap->iv_flags_ht));
785 /* NB: iv_bss is changed on return */
786 break;
787 case IEEE80211_S_CAC:
788 /*
789 * NB: This is the normal state change when CAC
790 * expires and no radar was detected; no need to
791 * clear the CAC timer as it's already expired.
792 */
793 /* fall thru... */
794 case IEEE80211_S_CSA:
795 #if 0
796 /*
797 * Shorten inactivity timer of associated stations
798 * to weed out sta's that don't follow a CSA.
799 */
800 ieee80211_iterate_nodes(&ic->ic_sta, sta_csa, vap);
801 #endif
802 /*
803 * Update bss node channel to reflect where
804 * we landed after CSA.
805 */
806 ieee80211_node_set_chan(ni,
807 ieee80211_ht_adjust_channel(ic, ic->ic_curchan,
808 ieee80211_htchanflags(ni->ni_chan)));
809 /* XXX bypass debug msgs */
810 break;
811 case IEEE80211_S_SCAN:
812 case IEEE80211_S_RUN:
813 #ifdef IEEE80211_DEBUG
814 if (ieee80211_msg_debug(vap)) {
815 ieee80211_note(vap,
816 "synchronized with %s meshid ",
817 ether_sprintf(ni->ni_meshid));
818 ieee80211_print_essid(ni->ni_meshid,
819 ni->ni_meshidlen);
820 /* XXX MCS/HT */
821 printf(" channel %d\n",
822 ieee80211_chan2ieee(ic, ic->ic_curchan));
823 }
824 #endif
825 break;
826 default:
827 break;
828 }
829 ieee80211_node_authorize(ni);
830 callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact,
831 mesh_rt_cleanup_cb, vap);
832 mesh_gatemode_setup(vap);
833 break;
834 default:
835 break;
836 }
837 /* NB: ostate not nstate */
838 ms->ms_ppath->mpp_newstate(vap, ostate, arg);
839 return 0;
840 }
841
842 static void
843 mesh_rt_cleanup_cb(void *arg)
844 {
845 struct ieee80211vap *vap = arg;
846 struct ieee80211_mesh_state *ms = vap->iv_mesh;
847
848 mesh_rt_flush_invalid(vap);
849 callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact,
850 mesh_rt_cleanup_cb, vap);
851 }
852
853 /*
854 * Mark a mesh STA as gate and return a pointer to it.
855 * If this is first time, we create a new gate route.
856 * Always update the path route to this mesh gate.
857 */
858 struct ieee80211_mesh_gate_route *
859 ieee80211_mesh_mark_gate(struct ieee80211vap *vap, const uint8_t *addr,
860 struct ieee80211_mesh_route *rt)
861 {
862 struct ieee80211_mesh_state *ms = vap->iv_mesh;
863 struct ieee80211_mesh_gate_route *gr = NULL, *next;
864 int found = 0;
865
866 MESH_RT_LOCK(ms);
867 TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) {
868 if (IEEE80211_ADDR_EQ(gr->gr_addr, addr)) {
869 found = 1;
870 break;
871 }
872 }
873
874 if (!found) {
875 /* New mesh gate add it to known table. */
876 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, addr,
877 "%s", "stored new gate information from pro-PREQ.");
878 gr = IEEE80211_MALLOC(ALIGN(sizeof(struct ieee80211_mesh_gate_route)),
879 M_80211_MESH_GT_RT,
880 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
881 IEEE80211_ADDR_COPY(gr->gr_addr, addr);
882 TAILQ_INSERT_TAIL(&ms->ms_known_gates, gr, gr_next);
883 }
884 gr->gr_route = rt;
885 /* TODO: link from path route to gate route */
886 MESH_RT_UNLOCK(ms);
887
888 return gr;
889 }
890
891
892 /*
893 * Helper function to note the Mesh Peer Link FSM change.
894 */
895 static void
896 mesh_linkchange(struct ieee80211_node *ni, enum ieee80211_mesh_mlstate state)
897 {
898 struct ieee80211vap *vap = ni->ni_vap;
899 struct ieee80211_mesh_state *ms = vap->iv_mesh;
900 #ifdef IEEE80211_DEBUG
901 static const char *meshlinkstates[] = {
902 [IEEE80211_NODE_MESH_IDLE] = "IDLE",
903 [IEEE80211_NODE_MESH_OPENSNT] = "OPEN SENT",
904 [IEEE80211_NODE_MESH_OPENRCV] = "OPEN RECEIVED",
905 [IEEE80211_NODE_MESH_CONFIRMRCV] = "CONFIRM RECEIVED",
906 [IEEE80211_NODE_MESH_ESTABLISHED] = "ESTABLISHED",
907 [IEEE80211_NODE_MESH_HOLDING] = "HOLDING"
908 };
909 #endif
910 IEEE80211_NOTE(vap, IEEE80211_MSG_MESH,
911 ni, "peer link: %s -> %s",
912 meshlinkstates[ni->ni_mlstate], meshlinkstates[state]);
913
914 /* track neighbor count */
915 if (state == IEEE80211_NODE_MESH_ESTABLISHED &&
916 ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) {
917 KASSERT(ms->ms_neighbors < 65535, ("neighbor count overflow"));
918 ms->ms_neighbors++;
919 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF);
920 } else if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED &&
921 state != IEEE80211_NODE_MESH_ESTABLISHED) {
922 KASSERT(ms->ms_neighbors > 0, ("neighbor count 0"));
923 ms->ms_neighbors--;
924 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF);
925 }
926 ni->ni_mlstate = state;
927 switch (state) {
928 case IEEE80211_NODE_MESH_HOLDING:
929 ms->ms_ppath->mpp_peerdown(ni);
930 break;
931 case IEEE80211_NODE_MESH_ESTABLISHED:
932 ieee80211_mesh_discover(vap, ni->ni_macaddr, NULL);
933 break;
934 default:
935 break;
936 }
937 }
938
939 /*
940 * Helper function to generate a unique local ID required for mesh
941 * peer establishment.
942 */
943 static void
944 mesh_checkid(void *arg, struct ieee80211_node *ni)
945 {
946 uint16_t *r = arg;
947
948 if (*r == ni->ni_mllid)
949 *(uint16_t *)arg = 0;
950 }
951
952 static uint32_t
953 mesh_generateid(struct ieee80211vap *vap)
954 {
955 int maxiter = 4;
956 uint16_t r;
957
958 do {
959 get_random_bytes(&r, 2);
960 ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_checkid, &r);
961 maxiter--;
962 } while (r == 0 && maxiter > 0);
963 return r;
964 }
965
966 /*
967 * Verifies if we already received this packet by checking its
968 * sequence number.
969 * Returns 0 if the frame is to be accepted, 1 otherwise.
970 */
971 static int
972 mesh_checkpseq(struct ieee80211vap *vap,
973 const uint8_t source[IEEE80211_ADDR_LEN], uint32_t seq)
974 {
975 struct ieee80211_mesh_route *rt;
976
977 rt = ieee80211_mesh_rt_find(vap, source);
978 if (rt == NULL) {
979 rt = ieee80211_mesh_rt_add(vap, source);
980 if (rt == NULL) {
981 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source,
982 "%s", "add mcast route failed");
983 vap->iv_stats.is_mesh_rtaddfailed++;
984 return 1;
985 }
986 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source,
987 "add mcast route, mesh seqno %d", seq);
988 rt->rt_lastmseq = seq;
989 return 0;
990 }
991 if (IEEE80211_MESH_SEQ_GEQ(rt->rt_lastmseq, seq)) {
992 return 1;
993 } else {
994 rt->rt_lastmseq = seq;
995 return 0;
996 }
997 }
998
999 /*
1000 * Iterate the routing table and locate the next hop.
1001 */
1002 struct ieee80211_node *
1003 ieee80211_mesh_find_txnode(struct ieee80211vap *vap,
1004 const uint8_t dest[IEEE80211_ADDR_LEN])
1005 {
1006 struct ieee80211_mesh_route *rt;
1007
1008 rt = ieee80211_mesh_rt_find(vap, dest);
1009 if (rt == NULL)
1010 return NULL;
1011 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) {
1012 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
1013 "%s: !valid, flags 0x%x", __func__, rt->rt_flags);
1014 /* XXX stat */
1015 return NULL;
1016 }
1017 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) {
1018 rt = ieee80211_mesh_rt_find(vap, rt->rt_mesh_gate);
1019 if (rt == NULL) return NULL;
1020 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) {
1021 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
1022 "%s: meshgate !valid, flags 0x%x", __func__,
1023 rt->rt_flags);
1024 /* XXX stat */
1025 return NULL;
1026 }
1027 }
1028 return ieee80211_find_txnode(vap, rt->rt_nexthop);
1029 }
1030
1031 static void
1032 mesh_transmit_to_gate(struct ieee80211vap *vap, struct mbuf *m,
1033 struct ieee80211_mesh_route *rt_gate)
1034 {
1035 struct ifnet *ifp = vap->iv_ifp;
1036 struct ieee80211_node *ni;
1037
1038 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
1039
1040 ni = ieee80211_mesh_find_txnode(vap, rt_gate->rt_dest);
1041 if (ni == NULL) {
1042 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
1043 m_freem(m);
1044 return;
1045 }
1046
1047 /*
1048 * Send through the VAP packet transmit path.
1049 * This consumes the node ref grabbed above and
1050 * the mbuf, regardless of whether there's a problem
1051 * or not.
1052 */
1053 (void) ieee80211_vap_pkt_send_dest(vap, m, ni);
1054 }
1055
1056 /*
1057 * Forward the queued frames to known valid mesh gates.
1058 * Assume destination to be outside the MBSS (i.e. proxy entry),
1059 * If no valid mesh gates are known silently discard queued frames.
1060 * After transmitting frames to all known valid mesh gates, this route
1061 * will be marked invalid, and a new path discovery will happen in the hopes
1062 * that (at least) one of the mesh gates have a new proxy entry for us to use.
1063 */
1064 void
1065 ieee80211_mesh_forward_to_gates(struct ieee80211vap *vap,
1066 struct ieee80211_mesh_route *rt_dest)
1067 {
1068 struct ieee80211com *ic = vap->iv_ic;
1069 struct ieee80211_mesh_state *ms = vap->iv_mesh;
1070 struct ieee80211_mesh_route *rt_gate;
1071 struct ieee80211_mesh_gate_route *gr = NULL, *gr_next;
1072 struct mbuf *m, *mcopy, *next;
1073
1074 IEEE80211_TX_UNLOCK_ASSERT(ic);
1075
1076 KASSERT( rt_dest->rt_flags == IEEE80211_MESHRT_FLAGS_DISCOVER,
1077 ("Route is not marked with IEEE80211_MESHRT_FLAGS_DISCOVER"));
1078
1079 /* XXX: send to more than one valid mash gate */
1080 MESH_RT_LOCK(ms);
1081
1082 m = ieee80211_ageq_remove(&ic->ic_stageq,
1083 (struct ieee80211_node *)(uintptr_t)
1084 ieee80211_mac_hash(ic, rt_dest->rt_dest));
1085
1086 TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, gr_next) {
1087 rt_gate = gr->gr_route;
1088 if (rt_gate == NULL) {
1089 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP,
1090 rt_dest->rt_dest,
1091 "mesh gate with no path %6D",
1092 gr->gr_addr, ":");
1093 continue;
1094 }
1095 if ((rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0)
1096 continue;
1097 KASSERT(rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_GATE,
1098 ("route not marked as a mesh gate"));
1099 KASSERT((rt_gate->rt_flags &
1100 IEEE80211_MESHRT_FLAGS_PROXY) == 0,
1101 ("found mesh gate that is also marked porxy"));
1102 /*
1103 * convert route to a proxy route gated by the current
1104 * mesh gate, this is needed so encap can built data
1105 * frame with correct address.
1106 */
1107 rt_dest->rt_flags = IEEE80211_MESHRT_FLAGS_PROXY |
1108 IEEE80211_MESHRT_FLAGS_VALID;
1109 rt_dest->rt_ext_seq = 1; /* random value */
1110 IEEE80211_ADDR_COPY(rt_dest->rt_mesh_gate, rt_gate->rt_dest);
1111 IEEE80211_ADDR_COPY(rt_dest->rt_nexthop, rt_gate->rt_nexthop);
1112 rt_dest->rt_metric = rt_gate->rt_metric;
1113 rt_dest->rt_nhops = rt_gate->rt_nhops;
1114 ieee80211_mesh_rt_update(rt_dest, ms->ms_ppath->mpp_inact);
1115 MESH_RT_UNLOCK(ms);
1116 /* XXX: lock?? */
1117 mcopy = m_dup(m, M_NOWAIT);
1118 for (; mcopy != NULL; mcopy = next) {
1119 next = mcopy->m_nextpkt;
1120 mcopy->m_nextpkt = NULL;
1121 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP,
1122 rt_dest->rt_dest,
1123 "flush queued frame %p len %d", mcopy,
1124 mcopy->m_pkthdr.len);
1125 mesh_transmit_to_gate(vap, mcopy, rt_gate);
1126 }
1127 MESH_RT_LOCK(ms);
1128 }
1129 rt_dest->rt_flags = 0; /* Mark invalid */
1130 m_freem(m);
1131 MESH_RT_UNLOCK(ms);
1132 }
1133
1134 /*
1135 * Forward the specified frame.
1136 * Decrement the TTL and set TA to our MAC address.
1137 */
1138 static void
1139 mesh_forward(struct ieee80211vap *vap, struct mbuf *m,
1140 const struct ieee80211_meshcntl *mc)
1141 {
1142 struct ieee80211com *ic = vap->iv_ic;
1143 struct ieee80211_mesh_state *ms = vap->iv_mesh;
1144 struct ifnet *ifp = vap->iv_ifp;
1145 const struct ieee80211_frame *wh =
1146 mtod(m, const struct ieee80211_frame *);
1147 struct mbuf *mcopy;
1148 struct ieee80211_meshcntl *mccopy;
1149 struct ieee80211_frame *whcopy;
1150 struct ieee80211_node *ni;
1151 int err;
1152
1153 /* This is called from the RX path - don't hold this lock */
1154 IEEE80211_TX_UNLOCK_ASSERT(ic);
1155
1156 /*
1157 * mesh ttl of 1 means we are the last one receiving it,
1158 * according to amendment we decrement and then check if
1159 * 0, if so we dont forward.
1160 */
1161 if (mc->mc_ttl < 1) {
1162 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1163 "%s", "frame not fwd'd, ttl 1");
1164 vap->iv_stats.is_mesh_fwd_ttl++;
1165 return;
1166 }
1167 if (!(ms->ms_flags & IEEE80211_MESHFLAGS_FWD)) {
1168 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1169 "%s", "frame not fwd'd, fwding disabled");
1170 vap->iv_stats.is_mesh_fwd_disabled++;
1171 return;
1172 }
1173 mcopy = m_dup(m, M_NOWAIT);
1174 if (mcopy == NULL) {
1175 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1176 "%s", "frame not fwd'd, cannot dup");
1177 vap->iv_stats.is_mesh_fwd_nobuf++;
1178 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
1179 return;
1180 }
1181 mcopy = m_pullup(mcopy, ieee80211_hdrspace(ic, wh) +
1182 sizeof(struct ieee80211_meshcntl));
1183 if (mcopy == NULL) {
1184 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1185 "%s", "frame not fwd'd, too short");
1186 vap->iv_stats.is_mesh_fwd_tooshort++;
1187 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
1188 m_freem(mcopy);
1189 return;
1190 }
1191 whcopy = mtod(mcopy, struct ieee80211_frame *);
1192 mccopy = (struct ieee80211_meshcntl *)
1193 (mtod(mcopy, uint8_t *) + ieee80211_hdrspace(ic, wh));
1194 /* XXX clear other bits? */
1195 whcopy->i_fc[1] &= ~IEEE80211_FC1_RETRY;
1196 IEEE80211_ADDR_COPY(whcopy->i_addr2, vap->iv_myaddr);
1197 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1198 ni = ieee80211_ref_node(vap->iv_bss);
1199 mcopy->m_flags |= M_MCAST;
1200 } else {
1201 ni = ieee80211_mesh_find_txnode(vap, whcopy->i_addr3);
1202 if (ni == NULL) {
1203 /*
1204 * [Optional] any of the following three actions:
1205 * o silently discard
1206 * o trigger a path discovery
1207 * o inform TA that meshDA is unknown.
1208 */
1209 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1210 "%s", "frame not fwd'd, no path");
1211 ms->ms_ppath->mpp_senderror(vap, whcopy->i_addr3, NULL,
1212 IEEE80211_REASON_MESH_PERR_NO_FI);
1213 vap->iv_stats.is_mesh_fwd_nopath++;
1214 m_freem(mcopy);
1215 return;
1216 }
1217 IEEE80211_ADDR_COPY(whcopy->i_addr1, ni->ni_macaddr);
1218 }
1219 KASSERT(mccopy->mc_ttl > 0, ("%s called with wrong ttl", __func__));
1220 mccopy->mc_ttl--;
1221
1222 /* XXX calculate priority so drivers can find the tx queue */
1223 M_WME_SETAC(mcopy, WME_AC_BE);
1224
1225 /* XXX do we know m_nextpkt is NULL? */
1226 mcopy->m_pkthdr.rcvif = (void *) ni;
1227
1228 /*
1229 * XXX this bypasses all of the VAP TX handling; it passes frames
1230 * directly to the parent interface.
1231 *
1232 * Because of this, there's no TX lock being held as there's no
1233 * encaps state being used.
1234 *
1235 * Doing a direct parent transmit may not be the correct thing
1236 * to do here; we'll have to re-think this soon.
1237 */
1238 IEEE80211_TX_LOCK(ic);
1239 err = ieee80211_parent_xmitpkt(ic, mcopy);
1240 IEEE80211_TX_UNLOCK(ic);
1241 if (!err)
1242 if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1);
1243 }
1244
1245 static struct mbuf *
1246 mesh_decap(struct ieee80211vap *vap, struct mbuf *m, int hdrlen, int meshdrlen)
1247 {
1248 #define WHDIR(wh) ((wh)->i_fc[1] & IEEE80211_FC1_DIR_MASK)
1249 #define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc)
1250 uint8_t b[sizeof(struct ieee80211_qosframe_addr4) +
1251 sizeof(struct ieee80211_meshcntl_ae10)];
1252 const struct ieee80211_qosframe_addr4 *wh;
1253 const struct ieee80211_meshcntl_ae10 *mc;
1254 struct ether_header *eh;
1255 struct llc *llc;
1256 int ae;
1257
1258 if (m->m_len < hdrlen + sizeof(*llc) &&
1259 (m = m_pullup(m, hdrlen + sizeof(*llc))) == NULL) {
1260 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ANY,
1261 "discard data frame: %s", "m_pullup failed");
1262 vap->iv_stats.is_rx_tooshort++;
1263 return NULL;
1264 }
1265 memcpy(b, mtod(m, caddr_t), hdrlen);
1266 wh = (const struct ieee80211_qosframe_addr4 *)&b[0];
1267 mc = (const struct ieee80211_meshcntl_ae10 *)&b[hdrlen - meshdrlen];
1268 KASSERT(WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS ||
1269 WHDIR(wh) == IEEE80211_FC1_DIR_DSTODS,
1270 ("bogus dir, fc 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1]));
1271
1272 llc = (struct llc *)(mtod(m, caddr_t) + hdrlen);
1273 if (llc->llc_dsap == LLC_SNAP_LSAP && llc->llc_ssap == LLC_SNAP_LSAP &&
1274 llc->llc_control == LLC_UI && llc->llc_snap.org_code[0] == 0 &&
1275 llc->llc_snap.org_code[1] == 0 && llc->llc_snap.org_code[2] == 0 &&
1276 /* NB: preserve AppleTalk frames that have a native SNAP hdr */
1277 !(llc->llc_snap.ether_type == htons(ETHERTYPE_AARP) ||
1278 llc->llc_snap.ether_type == htons(ETHERTYPE_IPX))) {
1279 m_adj(m, hdrlen + sizeof(struct llc) - sizeof(*eh));
1280 llc = NULL;
1281 } else {
1282 m_adj(m, hdrlen - sizeof(*eh));
1283 }
1284 eh = mtod(m, struct ether_header *);
1285 ae = mc->mc_flags & IEEE80211_MESH_AE_MASK;
1286 if (WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS) {
1287 IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr1);
1288 if (ae == IEEE80211_MESH_AE_00) {
1289 IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr3);
1290 } else if (ae == IEEE80211_MESH_AE_01) {
1291 IEEE80211_ADDR_COPY(eh->ether_shost,
1292 MC01(mc)->mc_addr4);
1293 } else {
1294 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1295 (const struct ieee80211_frame *)wh, NULL,
1296 "bad AE %d", ae);
1297 vap->iv_stats.is_mesh_badae++;
1298 m_freem(m);
1299 return NULL;
1300 }
1301 } else {
1302 if (ae == IEEE80211_MESH_AE_00) {
1303 IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr3);
1304 IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr4);
1305 } else if (ae == IEEE80211_MESH_AE_10) {
1306 IEEE80211_ADDR_COPY(eh->ether_dhost, mc->mc_addr5);
1307 IEEE80211_ADDR_COPY(eh->ether_shost, mc->mc_addr6);
1308 } else {
1309 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1310 (const struct ieee80211_frame *)wh, NULL,
1311 "bad AE %d", ae);
1312 vap->iv_stats.is_mesh_badae++;
1313 m_freem(m);
1314 return NULL;
1315 }
1316 }
1317 #ifndef __NO_STRICT_ALIGNMENT
1318 if (!ALIGNED_POINTER(mtod(m, caddr_t) + sizeof(*eh), uint32_t)) {
1319 m = ieee80211_realign(vap, m, sizeof(*eh));
1320 if (m == NULL)
1321 return NULL;
1322 }
1323 #endif /* !__NO_STRICT_ALIGNMENT */
1324 if (llc != NULL) {
1325 eh = mtod(m, struct ether_header *);
1326 eh->ether_type = htons(m->m_pkthdr.len - sizeof(*eh));
1327 }
1328 return m;
1329 #undef WDIR
1330 #undef MC01
1331 }
1332
1333 /*
1334 * Return non-zero if the unicast mesh data frame should be processed
1335 * locally. Frames that are not proxy'd have our address, otherwise
1336 * we need to consult the routing table to look for a proxy entry.
1337 */
1338 static __inline int
1339 mesh_isucastforme(struct ieee80211vap *vap, const struct ieee80211_frame *wh,
1340 const struct ieee80211_meshcntl *mc)
1341 {
1342 int ae = mc->mc_flags & 3;
1343
1344 KASSERT((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) == IEEE80211_FC1_DIR_DSTODS,
1345 ("bad dir 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1]));
1346 KASSERT(ae == IEEE80211_MESH_AE_00 || ae == IEEE80211_MESH_AE_10,
1347 ("bad AE %d", ae));
1348 if (ae == IEEE80211_MESH_AE_10) { /* ucast w/ proxy */
1349 const struct ieee80211_meshcntl_ae10 *mc10 =
1350 (const struct ieee80211_meshcntl_ae10 *) mc;
1351 struct ieee80211_mesh_route *rt =
1352 ieee80211_mesh_rt_find(vap, mc10->mc_addr5);
1353 /* check for proxy route to ourself */
1354 return (rt != NULL &&
1355 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY));
1356 } else /* ucast w/o proxy */
1357 return IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_myaddr);
1358 }
1359
1360 /*
1361 * Verifies transmitter, updates lifetime, precursor list and forwards data.
1362 * > 0 means we have forwarded data and no need to process locally
1363 * == 0 means we want to process locally (and we may have forwarded data
1364 * < 0 means there was an error and data should be discarded
1365 */
1366 static int
1367 mesh_recv_indiv_data_to_fwrd(struct ieee80211vap *vap, struct mbuf *m,
1368 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc)
1369 {
1370 struct ieee80211_qosframe_addr4 *qwh;
1371 struct ieee80211_mesh_state *ms = vap->iv_mesh;
1372 struct ieee80211_mesh_route *rt_meshda, *rt_meshsa;
1373
1374 /* This is called from the RX path - don't hold this lock */
1375 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
1376
1377 qwh = (struct ieee80211_qosframe_addr4 *)wh;
1378
1379 /*
1380 * TODO:
1381 * o verify addr2 is a legitimate transmitter
1382 * o lifetime of precursor of addr3 (addr2) is max(init, curr)
1383 * o lifetime of precursor of addr4 (nexthop) is max(init, curr)
1384 */
1385
1386 /* set lifetime of addr3 (meshDA) to initial value */
1387 rt_meshda = ieee80211_mesh_rt_find(vap, qwh->i_addr3);
1388 if (rt_meshda == NULL) {
1389 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, qwh->i_addr2,
1390 "no route to meshDA(%6D)", qwh->i_addr3, ":");
1391 /*
1392 * [Optional] any of the following three actions:
1393 * o silently discard [X]
1394 * o trigger a path discovery [ ]
1395 * o inform TA that meshDA is unknown. [ ]
1396 */
1397 /* XXX: stats */
1398 return (-1);
1399 }
1400
1401 ieee80211_mesh_rt_update(rt_meshda, ticks_to_msecs(
1402 ms->ms_ppath->mpp_inact));
1403
1404 /* set lifetime of addr4 (meshSA) to initial value */
1405 rt_meshsa = ieee80211_mesh_rt_find(vap, qwh->i_addr4);
1406 KASSERT(rt_meshsa != NULL, ("no route"));
1407 ieee80211_mesh_rt_update(rt_meshsa, ticks_to_msecs(
1408 ms->ms_ppath->mpp_inact));
1409
1410 mesh_forward(vap, m, mc);
1411 return (1); /* dont process locally */
1412 }
1413
1414 /*
1415 * Verifies transmitter, updates lifetime, precursor list and process data
1416 * locally, if data is proxy with AE = 10 it could mean data should go
1417 * on another mesh path or data should be forwarded to the DS.
1418 *
1419 * > 0 means we have forwarded data and no need to process locally
1420 * == 0 means we want to process locally (and we may have forwarded data
1421 * < 0 means there was an error and data should be discarded
1422 */
1423 static int
1424 mesh_recv_indiv_data_to_me(struct ieee80211vap *vap, struct mbuf *m,
1425 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc)
1426 {
1427 struct ieee80211_qosframe_addr4 *qwh;
1428 const struct ieee80211_meshcntl_ae10 *mc10;
1429 struct ieee80211_mesh_state *ms = vap->iv_mesh;
1430 struct ieee80211_mesh_route *rt;
1431 int ae;
1432
1433 /* This is called from the RX path - don't hold this lock */
1434 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
1435
1436 qwh = (struct ieee80211_qosframe_addr4 *)wh;
1437 mc10 = (const struct ieee80211_meshcntl_ae10 *)mc;
1438
1439 /*
1440 * TODO:
1441 * o verify addr2 is a legitimate transmitter
1442 * o lifetime of precursor entry is max(init, curr)
1443 */
1444
1445 /* set lifetime of addr4 (meshSA) to initial value */
1446 rt = ieee80211_mesh_rt_find(vap, qwh->i_addr4);
1447 KASSERT(rt != NULL, ("no route"));
1448 ieee80211_mesh_rt_update(rt, ticks_to_msecs(ms->ms_ppath->mpp_inact));
1449 rt = NULL;
1450
1451 ae = mc10->mc_flags & IEEE80211_MESH_AE_MASK;
1452 KASSERT(ae == IEEE80211_MESH_AE_00 ||
1453 ae == IEEE80211_MESH_AE_10, ("bad AE %d", ae));
1454 if (ae == IEEE80211_MESH_AE_10) {
1455 if (IEEE80211_ADDR_EQ(mc10->mc_addr5, qwh->i_addr3)) {
1456 return (0); /* process locally */
1457 }
1458
1459 rt = ieee80211_mesh_rt_find(vap, mc10->mc_addr5);
1460 if (rt != NULL &&
1461 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) &&
1462 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) == 0) {
1463 /*
1464 * Forward on another mesh-path, according to
1465 * amendment as specified in 9.32.4.1
1466 */
1467 IEEE80211_ADDR_COPY(qwh->i_addr3, mc10->mc_addr5);
1468 mesh_forward(vap, m,
1469 (const struct ieee80211_meshcntl *)mc10);
1470 return (1); /* dont process locally */
1471 }
1472 /*
1473 * All other cases: forward of MSDUs from the MBSS to DS indiv.
1474 * addressed according to 13.11.3.2.
1475 */
1476 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, qwh->i_addr2,
1477 "forward frame to DS, SA(%6D) DA(%6D)",
1478 mc10->mc_addr6, ":", mc10->mc_addr5, ":");
1479 }
1480 return (0); /* process locally */
1481 }
1482
1483 /*
1484 * Try to forward the group addressed data on to other mesh STAs, and
1485 * also to the DS.
1486 *
1487 * > 0 means we have forwarded data and no need to process locally
1488 * == 0 means we want to process locally (and we may have forwarded data
1489 * < 0 means there was an error and data should be discarded
1490 */
1491 static int
1492 mesh_recv_group_data(struct ieee80211vap *vap, struct mbuf *m,
1493 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc)
1494 {
1495 #define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc)
1496 struct ieee80211_mesh_state *ms = vap->iv_mesh;
1497
1498 /* This is called from the RX path - don't hold this lock */
1499 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
1500
1501 mesh_forward(vap, m, mc);
1502
1503 if(mc->mc_ttl > 0) {
1504 if (mc->mc_flags & IEEE80211_MESH_AE_01) {
1505 /*
1506 * Forward of MSDUs from the MBSS to DS group addressed
1507 * (according to 13.11.3.2)
1508 * This happens by delivering the packet, and a bridge
1509 * will sent it on another port member.
1510 */
1511 if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE &&
1512 ms->ms_flags & IEEE80211_MESHFLAGS_FWD) {
1513 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH,
1514 MC01(mc)->mc_addr4, "%s",
1515 "forward from MBSS to the DS");
1516 }
1517 }
1518 }
1519 return (0); /* process locally */
1520 #undef MC01
1521 }
1522
1523 static int
1524 mesh_input(struct ieee80211_node *ni, struct mbuf *m,
1525 const struct ieee80211_rx_stats *rxs, int rssi, int nf)
1526 {
1527 #define HAS_SEQ(type) ((type & 0x4) == 0)
1528 #define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc)
1529 struct ieee80211vap *vap = ni->ni_vap;
1530 struct ieee80211com *ic = ni->ni_ic;
1531 struct ifnet *ifp = vap->iv_ifp;
1532 struct ieee80211_frame *wh;
1533 const struct ieee80211_meshcntl *mc;
1534 int hdrspace, meshdrlen, need_tap, error;
1535 uint8_t dir, type, subtype, ae;
1536 uint32_t seq;
1537 const uint8_t *addr;
1538 uint8_t qos[2];
1539
1540 KASSERT(ni != NULL, ("null node"));
1541 ni->ni_inact = ni->ni_inact_reload;
1542
1543 need_tap = 1; /* mbuf need to be tapped. */
1544 type = -1; /* undefined */
1545
1546 /* This is called from the RX path - don't hold this lock */
1547 IEEE80211_TX_UNLOCK_ASSERT(ic);
1548
1549 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) {
1550 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1551 ni->ni_macaddr, NULL,
1552 "too short (1): len %u", m->m_pkthdr.len);
1553 vap->iv_stats.is_rx_tooshort++;
1554 goto out;
1555 }
1556 /*
1557 * Bit of a cheat here, we use a pointer for a 3-address
1558 * frame format but don't reference fields past outside
1559 * ieee80211_frame_min w/o first validating the data is
1560 * present.
1561 */
1562 wh = mtod(m, struct ieee80211_frame *);
1563
1564 if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) !=
1565 IEEE80211_FC0_VERSION_0) {
1566 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1567 ni->ni_macaddr, NULL, "wrong version %x", wh->i_fc[0]);
1568 vap->iv_stats.is_rx_badversion++;
1569 goto err;
1570 }
1571 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK;
1572 type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK;
1573 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK;
1574 if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) {
1575 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi);
1576 ni->ni_noise = nf;
1577 if (HAS_SEQ(type)) {
1578 uint8_t tid = ieee80211_gettid(wh);
1579
1580 if (IEEE80211_QOS_HAS_SEQ(wh) &&
1581 TID_TO_WME_AC(tid) >= WME_AC_VI)
1582 ic->ic_wme.wme_hipri_traffic++;
1583 if (! ieee80211_check_rxseq(ni, wh, wh->i_addr1))
1584 goto out;
1585 }
1586 }
1587 #ifdef IEEE80211_DEBUG
1588 /*
1589 * It's easier, but too expensive, to simulate different mesh
1590 * topologies by consulting the ACL policy very early, so do this
1591 * only under DEBUG.
1592 *
1593 * NB: this check is also done upon peering link initiation.
1594 */
1595 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) {
1596 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL,
1597 wh, NULL, "%s", "disallowed by ACL");
1598 vap->iv_stats.is_rx_acl++;
1599 goto out;
1600 }
1601 #endif
1602 switch (type) {
1603 case IEEE80211_FC0_TYPE_DATA:
1604 if (ni == vap->iv_bss)
1605 goto out;
1606 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) {
1607 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
1608 ni->ni_macaddr, NULL,
1609 "peer link not yet established (%d)",
1610 ni->ni_mlstate);
1611 vap->iv_stats.is_mesh_nolink++;
1612 goto out;
1613 }
1614 if (dir != IEEE80211_FC1_DIR_FROMDS &&
1615 dir != IEEE80211_FC1_DIR_DSTODS) {
1616 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1617 wh, "data", "incorrect dir 0x%x", dir);
1618 vap->iv_stats.is_rx_wrongdir++;
1619 goto err;
1620 }
1621
1622 /* All Mesh data frames are QoS subtype */
1623 if (!HAS_SEQ(type)) {
1624 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1625 wh, "data", "incorrect subtype 0x%x", subtype);
1626 vap->iv_stats.is_rx_badsubtype++;
1627 goto err;
1628 }
1629
1630 /*
1631 * Next up, any fragmentation.
1632 * XXX: we defrag before we even try to forward,
1633 * Mesh Control field is not present in sub-sequent
1634 * fragmented frames. This is in contrast to Draft 4.0.
1635 */
1636 hdrspace = ieee80211_hdrspace(ic, wh);
1637 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1638 m = ieee80211_defrag(ni, m, hdrspace);
1639 if (m == NULL) {
1640 /* Fragment dropped or frame not complete yet */
1641 goto out;
1642 }
1643 }
1644 wh = mtod(m, struct ieee80211_frame *); /* NB: after defrag */
1645
1646 /*
1647 * Now we have a complete Mesh Data frame.
1648 */
1649
1650 /*
1651 * Only fromDStoDS data frames use 4 address qos frames
1652 * as specified in amendment. Otherwise addr4 is located
1653 * in the Mesh Control field and a 3 address qos frame
1654 * is used.
1655 */
1656 if (IEEE80211_IS_DSTODS(wh))
1657 *(uint16_t *)qos = *(uint16_t *)
1658 ((struct ieee80211_qosframe_addr4 *)wh)->i_qos;
1659 else
1660 *(uint16_t *)qos = *(uint16_t *)
1661 ((struct ieee80211_qosframe *)wh)->i_qos;
1662
1663 /*
1664 * NB: The mesh STA sets the Mesh Control Present
1665 * subfield to 1 in the Mesh Data frame containing
1666 * an unfragmented MSDU, an A-MSDU, or the first
1667 * fragment of an MSDU.
1668 * After defrag it should always be present.
1669 */
1670 if (!(qos[1] & IEEE80211_QOS_MC)) {
1671 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
1672 ni->ni_macaddr, NULL,
1673 "%s", "Mesh control field not present");
1674 vap->iv_stats.is_rx_elem_missing++; /* XXX: kinda */
1675 goto err;
1676 }
1677
1678 /* pull up enough to get to the mesh control */
1679 if (m->m_len < hdrspace + sizeof(struct ieee80211_meshcntl) &&
1680 (m = m_pullup(m, hdrspace +
1681 sizeof(struct ieee80211_meshcntl))) == NULL) {
1682 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1683 ni->ni_macaddr, NULL,
1684 "data too short: expecting %u", hdrspace);
1685 vap->iv_stats.is_rx_tooshort++;
1686 goto out; /* XXX */
1687 }
1688 /*
1689 * Now calculate the full extent of the headers. Note
1690 * mesh_decap will pull up anything we didn't get
1691 * above when it strips the 802.11 headers.
1692 */
1693 mc = (const struct ieee80211_meshcntl *)
1694 (mtod(m, const uint8_t *) + hdrspace);
1695 ae = mc->mc_flags & IEEE80211_MESH_AE_MASK;
1696 meshdrlen = sizeof(struct ieee80211_meshcntl) +
1697 ae * IEEE80211_ADDR_LEN;
1698 hdrspace += meshdrlen;
1699
1700 /* pull complete hdrspace = ieee80211_hdrspace + meshcontrol */
1701 if ((meshdrlen > sizeof(struct ieee80211_meshcntl)) &&
1702 (m->m_len < hdrspace) &&
1703 ((m = m_pullup(m, hdrspace)) == NULL)) {
1704 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1705 ni->ni_macaddr, NULL,
1706 "data too short: expecting %u", hdrspace);
1707 vap->iv_stats.is_rx_tooshort++;
1708 goto out; /* XXX */
1709 }
1710 /* XXX: are we sure there is no reallocating after m_pullup? */
1711
1712 seq = le32dec(mc->mc_seq);
1713 if (IEEE80211_IS_MULTICAST(wh->i_addr1))
1714 addr = wh->i_addr3;
1715 else if (ae == IEEE80211_MESH_AE_01)
1716 addr = MC01(mc)->mc_addr4;
1717 else
1718 addr = ((struct ieee80211_qosframe_addr4 *)wh)->i_addr4;
1719 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, addr)) {
1720 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
1721 addr, "data", "%s", "not to me");
1722 vap->iv_stats.is_rx_wrongbss++; /* XXX kinda */
1723 goto out;
1724 }
1725 if (mesh_checkpseq(vap, addr, seq) != 0) {
1726 vap->iv_stats.is_rx_dup++;
1727 goto out;
1728 }
1729
1730 /* This code "routes" the frame to the right control path */
1731 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1732 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr3))
1733 error =
1734 mesh_recv_indiv_data_to_me(vap, m, wh, mc);
1735 else if (IEEE80211_IS_MULTICAST(wh->i_addr3))
1736 error = mesh_recv_group_data(vap, m, wh, mc);
1737 else
1738 error = mesh_recv_indiv_data_to_fwrd(vap, m,
1739 wh, mc);
1740 } else
1741 error = mesh_recv_group_data(vap, m, wh, mc);
1742 if (error < 0)
1743 goto err;
1744 else if (error > 0)
1745 goto out;
1746
1747 if (ieee80211_radiotap_active_vap(vap))
1748 ieee80211_radiotap_rx(vap, m);
1749 need_tap = 0;
1750
1751 /*
1752 * Finally, strip the 802.11 header.
1753 */
1754 m = mesh_decap(vap, m, hdrspace, meshdrlen);
1755 if (m == NULL) {
1756 /* XXX mask bit to check for both */
1757 /* don't count Null data frames as errors */
1758 if (subtype == IEEE80211_FC0_SUBTYPE_NODATA ||
1759 subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL)
1760 goto out;
1761 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
1762 ni->ni_macaddr, "data", "%s", "decap error");
1763 vap->iv_stats.is_rx_decap++;
1764 IEEE80211_NODE_STAT(ni, rx_decap);
1765 goto err;
1766 }
1767 if (qos[0] & IEEE80211_QOS_AMSDU) {
1768 m = ieee80211_decap_amsdu(ni, m);
1769 if (m == NULL)
1770 return IEEE80211_FC0_TYPE_DATA;
1771 }
1772 ieee80211_deliver_data(vap, ni, m);
1773 return type;
1774 case IEEE80211_FC0_TYPE_MGT:
1775 vap->iv_stats.is_rx_mgmt++;
1776 IEEE80211_NODE_STAT(ni, rx_mgmt);
1777 if (dir != IEEE80211_FC1_DIR_NODS) {
1778 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1779 wh, "mgt", "incorrect dir 0x%x", dir);
1780 vap->iv_stats.is_rx_wrongdir++;
1781 goto err;
1782 }
1783 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) {
1784 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1785 ni->ni_macaddr, "mgt", "too short: len %u",
1786 m->m_pkthdr.len);
1787 vap->iv_stats.is_rx_tooshort++;
1788 goto out;
1789 }
1790 #ifdef IEEE80211_DEBUG
1791 if ((ieee80211_msg_debug(vap) &&
1792 (vap->iv_ic->ic_flags & IEEE80211_F_SCAN)) ||
1793 ieee80211_msg_dumppkts(vap)) {
1794 if_printf(ifp, "received %s from %s rssi %d\n",
1795 ieee80211_mgt_subtype_name(subtype),
1796 ether_sprintf(wh->i_addr2), rssi);
1797 }
1798 #endif
1799 if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) {
1800 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1801 wh, NULL, "%s", "WEP set but not permitted");
1802 vap->iv_stats.is_rx_mgtdiscard++; /* XXX */
1803 goto out;
1804 }
1805 vap->iv_recv_mgmt(ni, m, subtype, rxs, rssi, nf);
1806 goto out;
1807 case IEEE80211_FC0_TYPE_CTL:
1808 vap->iv_stats.is_rx_ctl++;
1809 IEEE80211_NODE_STAT(ni, rx_ctrl);
1810 goto out;
1811 default:
1812 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1813 wh, "bad", "frame type 0x%x", type);
1814 /* should not come here */
1815 break;
1816 }
1817 err:
1818 if_inc_counter(ifp, IFCOUNTER_IERRORS, 1);
1819 out:
1820 if (m != NULL) {
1821 if (need_tap && ieee80211_radiotap_active_vap(vap))
1822 ieee80211_radiotap_rx(vap, m);
1823 m_freem(m);
1824 }
1825 return type;
1826 #undef HAS_SEQ
1827 #undef MC01
1828 }
1829
1830 static void
1831 mesh_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, int subtype,
1832 const struct ieee80211_rx_stats *rxs, int rssi, int nf)
1833 {
1834 struct ieee80211vap *vap = ni->ni_vap;
1835 struct ieee80211_mesh_state *ms = vap->iv_mesh;
1836 struct ieee80211com *ic = ni->ni_ic;
1837 struct ieee80211_channel *rxchan = ic->ic_curchan;
1838 struct ieee80211_frame *wh;
1839 struct ieee80211_mesh_route *rt;
1840 uint8_t *frm, *efrm;
1841
1842 wh = mtod(m0, struct ieee80211_frame *);
1843 frm = (uint8_t *)&wh[1];
1844 efrm = mtod(m0, uint8_t *) + m0->m_len;
1845 switch (subtype) {
1846 case IEEE80211_FC0_SUBTYPE_PROBE_RESP:
1847 case IEEE80211_FC0_SUBTYPE_BEACON:
1848 {
1849 struct ieee80211_scanparams scan;
1850 struct ieee80211_channel *c;
1851 /*
1852 * We process beacon/probe response
1853 * frames to discover neighbors.
1854 */
1855 if (rxs != NULL) {
1856 c = ieee80211_lookup_channel_rxstatus(vap, rxs);
1857 if (c != NULL)
1858 rxchan = c;
1859 }
1860 if (ieee80211_parse_beacon(ni, m0, rxchan, &scan) != 0)
1861 return;
1862 /*
1863 * Count frame now that we know it's to be processed.
1864 */
1865 if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) {
1866 vap->iv_stats.is_rx_beacon++; /* XXX remove */
1867 IEEE80211_NODE_STAT(ni, rx_beacons);
1868 } else
1869 IEEE80211_NODE_STAT(ni, rx_proberesp);
1870 /*
1871 * If scanning, just pass information to the scan module.
1872 */
1873 if (ic->ic_flags & IEEE80211_F_SCAN) {
1874 if (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN) {
1875 /*
1876 * Actively scanning a channel marked passive;
1877 * send a probe request now that we know there
1878 * is 802.11 traffic present.
1879 *
1880 * XXX check if the beacon we recv'd gives
1881 * us what we need and suppress the probe req
1882 */
1883 ieee80211_probe_curchan(vap, 1);
1884 ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN;
1885 }
1886 ieee80211_add_scan(vap, rxchan, &scan, wh,
1887 subtype, rssi, nf);
1888 return;
1889 }
1890
1891 /* The rest of this code assumes we are running */
1892 if (vap->iv_state != IEEE80211_S_RUN)
1893 return;
1894 /*
1895 * Ignore non-mesh STAs.
1896 */
1897 if ((scan.capinfo &
1898 (IEEE80211_CAPINFO_ESS|IEEE80211_CAPINFO_IBSS)) ||
1899 scan.meshid == NULL || scan.meshconf == NULL) {
1900 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1901 wh, "beacon", "%s", "not a mesh sta");
1902 vap->iv_stats.is_mesh_wrongmesh++;
1903 return;
1904 }
1905 /*
1906 * Ignore STAs for other mesh networks.
1907 */
1908 if (memcmp(scan.meshid+2, ms->ms_id, ms->ms_idlen) != 0 ||
1909 mesh_verify_meshconf(vap, scan.meshconf)) {
1910 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1911 wh, "beacon", "%s", "not for our mesh");
1912 vap->iv_stats.is_mesh_wrongmesh++;
1913 return;
1914 }
1915 /*
1916 * Peer only based on the current ACL policy.
1917 */
1918 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) {
1919 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL,
1920 wh, NULL, "%s", "disallowed by ACL");
1921 vap->iv_stats.is_rx_acl++;
1922 return;
1923 }
1924 /*
1925 * Do neighbor discovery.
1926 */
1927 if (!IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_macaddr)) {
1928 /*
1929 * Create a new entry in the neighbor table.
1930 */
1931 ni = ieee80211_add_neighbor(vap, wh, &scan);
1932 }
1933 /*
1934 * Automatically peer with discovered nodes if possible.
1935 */
1936 if (ni != vap->iv_bss &&
1937 (ms->ms_flags & IEEE80211_MESHFLAGS_AP)) {
1938 switch (ni->ni_mlstate) {
1939 case IEEE80211_NODE_MESH_IDLE:
1940 {
1941 uint16_t args[1];
1942
1943 /* Wait for backoff callout to reset counter */
1944 if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding)
1945 return;
1946
1947 ni->ni_mlpid = mesh_generateid(vap);
1948 if (ni->ni_mlpid == 0)
1949 return;
1950 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENSNT);
1951 args[0] = ni->ni_mlpid;
1952 ieee80211_send_action(ni,
1953 IEEE80211_ACTION_CAT_SELF_PROT,
1954 IEEE80211_ACTION_MESHPEERING_OPEN, args);
1955 ni->ni_mlrcnt = 0;
1956 mesh_peer_timeout_setup(ni);
1957 break;
1958 }
1959 case IEEE80211_NODE_MESH_ESTABLISHED:
1960 {
1961 /*
1962 * Valid beacon from a peer mesh STA
1963 * bump TA lifetime
1964 */
1965 rt = ieee80211_mesh_rt_find(vap, wh->i_addr2);
1966 if(rt != NULL) {
1967 ieee80211_mesh_rt_update(rt,
1968 ticks_to_msecs(
1969 ms->ms_ppath->mpp_inact));
1970 }
1971 break;
1972 }
1973 default:
1974 break; /* ignore */
1975 }
1976 }
1977 break;
1978 }
1979 case IEEE80211_FC0_SUBTYPE_PROBE_REQ:
1980 {
1981 uint8_t *ssid, *meshid, *rates, *xrates;
1982
1983 if (vap->iv_state != IEEE80211_S_RUN) {
1984 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1985 wh, NULL, "wrong state %s",
1986 ieee80211_state_name[vap->iv_state]);
1987 vap->iv_stats.is_rx_mgtdiscard++;
1988 return;
1989 }
1990 if (IEEE80211_IS_MULTICAST(wh->i_addr2)) {
1991 /* frame must be directed */
1992 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1993 wh, NULL, "%s", "not unicast");
1994 vap->iv_stats.is_rx_mgtdiscard++; /* XXX stat */
1995 return;
1996 }
1997 /*
1998 * prreq frame format
1999 * [tlv] ssid
2000 * [tlv] supported rates
2001 * [tlv] extended supported rates
2002 * [tlv] mesh id
2003 */
2004 ssid = meshid = rates = xrates = NULL;
2005 while (efrm - frm > 1) {
2006 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return);
2007 switch (*frm) {
2008 case IEEE80211_ELEMID_SSID:
2009 ssid = frm;
2010 break;
2011 case IEEE80211_ELEMID_RATES:
2012 rates = frm;
2013 break;
2014 case IEEE80211_ELEMID_XRATES:
2015 xrates = frm;
2016 break;
2017 case IEEE80211_ELEMID_MESHID:
2018 meshid = frm;
2019 break;
2020 }
2021 frm += frm[1] + 2;
2022 }
2023 IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return);
2024 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return);
2025 if (xrates != NULL)
2026 IEEE80211_VERIFY_ELEMENT(xrates,
2027 IEEE80211_RATE_MAXSIZE - rates[1], return);
2028 if (meshid != NULL) {
2029 IEEE80211_VERIFY_ELEMENT(meshid,
2030 IEEE80211_MESHID_LEN, return);
2031 /* NB: meshid, not ssid */
2032 IEEE80211_VERIFY_SSID(vap->iv_bss, meshid, return);
2033 }
2034
2035 /* XXX find a better class or define it's own */
2036 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_INPUT, wh->i_addr2,
2037 "%s", "recv probe req");
2038 /*
2039 * Some legacy 11b clients cannot hack a complete
2040 * probe response frame. When the request includes
2041 * only a bare-bones rate set, communicate this to
2042 * the transmit side.
2043 */
2044 ieee80211_send_proberesp(vap, wh->i_addr2, 0);
2045 break;
2046 }
2047
2048 case IEEE80211_FC0_SUBTYPE_ACTION:
2049 case IEEE80211_FC0_SUBTYPE_ACTION_NOACK:
2050 if (ni == vap->iv_bss) {
2051 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2052 wh, NULL, "%s", "unknown node");
2053 vap->iv_stats.is_rx_mgtdiscard++;
2054 } else if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) &&
2055 !IEEE80211_IS_MULTICAST(wh->i_addr1)) {
2056 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2057 wh, NULL, "%s", "not for us");
2058 vap->iv_stats.is_rx_mgtdiscard++;
2059 } else if (vap->iv_state != IEEE80211_S_RUN) {
2060 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2061 wh, NULL, "wrong state %s",
2062 ieee80211_state_name[vap->iv_state]);
2063 vap->iv_stats.is_rx_mgtdiscard++;
2064 } else {
2065 if (ieee80211_parse_action(ni, m0) == 0)
2066 (void)ic->ic_recv_action(ni, wh, frm, efrm);
2067 }
2068 break;
2069
2070 case IEEE80211_FC0_SUBTYPE_ASSOC_REQ:
2071 case IEEE80211_FC0_SUBTYPE_ASSOC_RESP:
2072 case IEEE80211_FC0_SUBTYPE_REASSOC_REQ:
2073 case IEEE80211_FC0_SUBTYPE_REASSOC_RESP:
2074 case IEEE80211_FC0_SUBTYPE_TIMING_ADV:
2075 case IEEE80211_FC0_SUBTYPE_ATIM:
2076 case IEEE80211_FC0_SUBTYPE_DISASSOC:
2077 case IEEE80211_FC0_SUBTYPE_AUTH:
2078 case IEEE80211_FC0_SUBTYPE_DEAUTH:
2079 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2080 wh, NULL, "%s", "not handled");
2081 vap->iv_stats.is_rx_mgtdiscard++;
2082 break;
2083
2084 default:
2085 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
2086 wh, "mgt", "subtype 0x%x not handled", subtype);
2087 vap->iv_stats.is_rx_badsubtype++;
2088 break;
2089 }
2090 }
2091
2092 static void
2093 mesh_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype)
2094 {
2095
2096 switch (subtype) {
2097 case IEEE80211_FC0_SUBTYPE_BAR:
2098 ieee80211_recv_bar(ni, m);
2099 break;
2100 }
2101 }
2102
2103 /*
2104 * Parse meshpeering action ie's for MPM frames
2105 */
2106 static const struct ieee80211_meshpeer_ie *
2107 mesh_parse_meshpeering_action(struct ieee80211_node *ni,
2108 const struct ieee80211_frame *wh, /* XXX for VERIFY_LENGTH */
2109 const uint8_t *frm, const uint8_t *efrm,
2110 struct ieee80211_meshpeer_ie *mp, uint8_t subtype)
2111 {
2112 struct ieee80211vap *vap = ni->ni_vap;
2113 const struct ieee80211_meshpeer_ie *mpie;
2114 uint16_t args[3];
2115 const uint8_t *meshid, *meshconf;
2116 uint8_t sendclose = 0; /* 1 = MPM frame rejected, close will be sent */
2117
2118 meshid = meshconf = NULL;
2119 while (efrm - frm > 1) {
2120 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return NULL);
2121 switch (*frm) {
2122 case IEEE80211_ELEMID_MESHID:
2123 meshid = frm;
2124 break;
2125 case IEEE80211_ELEMID_MESHCONF:
2126 meshconf = frm;
2127 break;
2128 case IEEE80211_ELEMID_MESHPEER:
2129 mpie = (const struct ieee80211_meshpeer_ie *) frm;
2130 memset(mp, 0, sizeof(*mp));
2131 mp->peer_len = mpie->peer_len;
2132 mp->peer_proto = le16dec(&mpie->peer_proto);
2133 mp->peer_llinkid = le16dec(&mpie->peer_llinkid);
2134 switch (subtype) {
2135 case IEEE80211_ACTION_MESHPEERING_CONFIRM:
2136 mp->peer_linkid =
2137 le16dec(&mpie->peer_linkid);
2138 break;
2139 case IEEE80211_ACTION_MESHPEERING_CLOSE:
2140 /* NB: peer link ID is optional */
2141 if (mpie->peer_len ==
2142 (IEEE80211_MPM_BASE_SZ + 2)) {
2143 mp->peer_linkid = 0;
2144 mp->peer_rcode =
2145 le16dec(&mpie->peer_linkid);
2146 } else {
2147 mp->peer_linkid =
2148 le16dec(&mpie->peer_linkid);
2149 mp->peer_rcode =
2150 le16dec(&mpie->peer_rcode);
2151 }
2152 break;
2153 }
2154 break;
2155 }
2156 frm += frm[1] + 2;
2157 }
2158
2159 /*
2160 * Verify the contents of the frame.
2161 * If it fails validation, close the peer link.
2162 */
2163 if (mesh_verify_meshpeer(vap, subtype, (const uint8_t *)mp)) {
2164 sendclose = 1;
2165 IEEE80211_DISCARD(vap,
2166 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2167 wh, NULL, "%s", "MPM validation failed");
2168 }
2169
2170 /* If meshid is not the same reject any frames type. */
2171 if (sendclose == 0 && mesh_verify_meshid(vap, meshid)) {
2172 sendclose = 1;
2173 IEEE80211_DISCARD(vap,
2174 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2175 wh, NULL, "%s", "not for our mesh");
2176 if (subtype == IEEE80211_ACTION_MESHPEERING_CLOSE) {
2177 /*
2178 * Standard not clear about this, if we dont ignore
2179 * there will be an endless loop between nodes sending
2180 * CLOSE frames between each other with wrong meshid.
2181 * Discard and timers will bring FSM to IDLE state.
2182 */
2183 return NULL;
2184 }
2185 }
2186
2187 /*
2188 * Close frames are accepted if meshid is the same.
2189 * Verify the other two types.
2190 */
2191 if (sendclose == 0 && subtype != IEEE80211_ACTION_MESHPEERING_CLOSE &&
2192 mesh_verify_meshconf(vap, meshconf)) {
2193 sendclose = 1;
2194 IEEE80211_DISCARD(vap,
2195 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2196 wh, NULL, "%s", "configuration missmatch");
2197 }
2198
2199 if (sendclose) {
2200 vap->iv_stats.is_rx_mgtdiscard++;
2201 switch (ni->ni_mlstate) {
2202 case IEEE80211_NODE_MESH_IDLE:
2203 case IEEE80211_NODE_MESH_ESTABLISHED:
2204 case IEEE80211_NODE_MESH_HOLDING:
2205 /* ignore */
2206 break;
2207 case IEEE80211_NODE_MESH_OPENSNT:
2208 case IEEE80211_NODE_MESH_OPENRCV:
2209 case IEEE80211_NODE_MESH_CONFIRMRCV:
2210 args[0] = ni->ni_mlpid;
2211 args[1] = ni->ni_mllid;
2212 /* Reason codes for rejection */
2213 switch (subtype) {
2214 case IEEE80211_ACTION_MESHPEERING_OPEN:
2215 args[2] = IEEE80211_REASON_MESH_CPVIOLATION;
2216 break;
2217 case IEEE80211_ACTION_MESHPEERING_CONFIRM:
2218 args[2] = IEEE80211_REASON_MESH_INCONS_PARAMS;
2219 break;
2220 }
2221 ieee80211_send_action(ni,
2222 IEEE80211_ACTION_CAT_SELF_PROT,
2223 IEEE80211_ACTION_MESHPEERING_CLOSE,
2224 args);
2225 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2226 mesh_peer_timeout_setup(ni);
2227 break;
2228 }
2229 return NULL;
2230 }
2231
2232 return (const struct ieee80211_meshpeer_ie *) mp;
2233 }
2234
2235 static int
2236 mesh_recv_action_meshpeering_open(struct ieee80211_node *ni,
2237 const struct ieee80211_frame *wh,
2238 const uint8_t *frm, const uint8_t *efrm)
2239 {
2240 struct ieee80211vap *vap = ni->ni_vap;
2241 struct ieee80211_mesh_state *ms = vap->iv_mesh;
2242 struct ieee80211_meshpeer_ie ie;
2243 const struct ieee80211_meshpeer_ie *meshpeer;
2244 uint16_t args[3];
2245
2246 /* +2+2 for action + code + capabilites */
2247 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2, efrm, &ie,
2248 IEEE80211_ACTION_MESHPEERING_OPEN);
2249 if (meshpeer == NULL) {
2250 return 0;
2251 }
2252
2253 /* XXX move up */
2254 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2255 "recv PEER OPEN, lid 0x%x", meshpeer->peer_llinkid);
2256
2257 switch (ni->ni_mlstate) {
2258 case IEEE80211_NODE_MESH_IDLE:
2259 /* Reject open request if reached our maximum neighbor count */
2260 if (ms->ms_neighbors >= IEEE80211_MESH_MAX_NEIGHBORS) {
2261 args[0] = meshpeer->peer_llinkid;
2262 args[1] = 0;
2263 args[2] = IEEE80211_REASON_MESH_MAX_PEERS;
2264 ieee80211_send_action(ni,
2265 IEEE80211_ACTION_CAT_SELF_PROT,
2266 IEEE80211_ACTION_MESHPEERING_CLOSE,
2267 args);
2268 /* stay in IDLE state */
2269 return (0);
2270 }
2271 /* Open frame accepted */
2272 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV);
2273 ni->ni_mllid = meshpeer->peer_llinkid;
2274 ni->ni_mlpid = mesh_generateid(vap);
2275 if (ni->ni_mlpid == 0)
2276 return 0; /* XXX */
2277 args[0] = ni->ni_mlpid;
2278 /* Announce we're open too... */
2279 ieee80211_send_action(ni,
2280 IEEE80211_ACTION_CAT_SELF_PROT,
2281 IEEE80211_ACTION_MESHPEERING_OPEN, args);
2282 /* ...and confirm the link. */
2283 args[0] = ni->ni_mlpid;
2284 args[1] = ni->ni_mllid;
2285 ieee80211_send_action(ni,
2286 IEEE80211_ACTION_CAT_SELF_PROT,
2287 IEEE80211_ACTION_MESHPEERING_CONFIRM,
2288 args);
2289 mesh_peer_timeout_setup(ni);
2290 break;
2291 case IEEE80211_NODE_MESH_OPENRCV:
2292 /* Wrong Link ID */
2293 if (ni->ni_mllid != meshpeer->peer_llinkid) {
2294 args[0] = ni->ni_mllid;
2295 args[1] = ni->ni_mlpid;
2296 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2297 ieee80211_send_action(ni,
2298 IEEE80211_ACTION_CAT_SELF_PROT,
2299 IEEE80211_ACTION_MESHPEERING_CLOSE,
2300 args);
2301 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2302 mesh_peer_timeout_setup(ni);
2303 break;
2304 }
2305 /* Duplicate open, confirm again. */
2306 args[0] = ni->ni_mlpid;
2307 args[1] = ni->ni_mllid;
2308 ieee80211_send_action(ni,
2309 IEEE80211_ACTION_CAT_SELF_PROT,
2310 IEEE80211_ACTION_MESHPEERING_CONFIRM,
2311 args);
2312 break;
2313 case IEEE80211_NODE_MESH_OPENSNT:
2314 ni->ni_mllid = meshpeer->peer_llinkid;
2315 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV);
2316 args[0] = ni->ni_mlpid;
2317 args[1] = ni->ni_mllid;
2318 ieee80211_send_action(ni,
2319 IEEE80211_ACTION_CAT_SELF_PROT,
2320 IEEE80211_ACTION_MESHPEERING_CONFIRM,
2321 args);
2322 /* NB: don't setup/clear any timeout */
2323 break;
2324 case IEEE80211_NODE_MESH_CONFIRMRCV:
2325 if (ni->ni_mlpid != meshpeer->peer_linkid ||
2326 ni->ni_mllid != meshpeer->peer_llinkid) {
2327 args[0] = ni->ni_mlpid;
2328 args[1] = ni->ni_mllid;
2329 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2330 ieee80211_send_action(ni,
2331 IEEE80211_ACTION_CAT_SELF_PROT,
2332 IEEE80211_ACTION_MESHPEERING_CLOSE,
2333 args);
2334 mesh_linkchange(ni,
2335 IEEE80211_NODE_MESH_HOLDING);
2336 mesh_peer_timeout_setup(ni);
2337 break;
2338 }
2339 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED);
2340 ni->ni_mllid = meshpeer->peer_llinkid;
2341 args[0] = ni->ni_mlpid;
2342 args[1] = ni->ni_mllid;
2343 ieee80211_send_action(ni,
2344 IEEE80211_ACTION_CAT_SELF_PROT,
2345 IEEE80211_ACTION_MESHPEERING_CONFIRM,
2346 args);
2347 mesh_peer_timeout_stop(ni);
2348 break;
2349 case IEEE80211_NODE_MESH_ESTABLISHED:
2350 if (ni->ni_mllid != meshpeer->peer_llinkid) {
2351 args[0] = ni->ni_mllid;
2352 args[1] = ni->ni_mlpid;
2353 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2354 ieee80211_send_action(ni,
2355 IEEE80211_ACTION_CAT_SELF_PROT,
2356 IEEE80211_ACTION_MESHPEERING_CLOSE,
2357 args);
2358 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2359 mesh_peer_timeout_setup(ni);
2360 break;
2361 }
2362 args[0] = ni->ni_mlpid;
2363 args[1] = ni->ni_mllid;
2364 ieee80211_send_action(ni,
2365 IEEE80211_ACTION_CAT_SELF_PROT,
2366 IEEE80211_ACTION_MESHPEERING_CONFIRM,
2367 args);
2368 break;
2369 case IEEE80211_NODE_MESH_HOLDING:
2370 args[0] = ni->ni_mlpid;
2371 args[1] = meshpeer->peer_llinkid;
2372 /* Standard not clear about what the reaason code should be */
2373 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2374 ieee80211_send_action(ni,
2375 IEEE80211_ACTION_CAT_SELF_PROT,
2376 IEEE80211_ACTION_MESHPEERING_CLOSE,
2377 args);
2378 break;
2379 }
2380 return 0;
2381 }
2382
2383 static int
2384 mesh_recv_action_meshpeering_confirm(struct ieee80211_node *ni,
2385 const struct ieee80211_frame *wh,
2386 const uint8_t *frm, const uint8_t *efrm)
2387 {
2388 struct ieee80211vap *vap = ni->ni_vap;
2389 struct ieee80211_meshpeer_ie ie;
2390 const struct ieee80211_meshpeer_ie *meshpeer;
2391 uint16_t args[3];
2392
2393 /* +2+2+2+2 for action + code + capabilites + status code + AID */
2394 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2+2+2, efrm, &ie,
2395 IEEE80211_ACTION_MESHPEERING_CONFIRM);
2396 if (meshpeer == NULL) {
2397 return 0;
2398 }
2399
2400 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2401 "recv PEER CONFIRM, local id 0x%x, peer id 0x%x",
2402 meshpeer->peer_llinkid, meshpeer->peer_linkid);
2403
2404 switch (ni->ni_mlstate) {
2405 case IEEE80211_NODE_MESH_OPENRCV:
2406 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED);
2407 mesh_peer_timeout_stop(ni);
2408 break;
2409 case IEEE80211_NODE_MESH_OPENSNT:
2410 mesh_linkchange(ni, IEEE80211_NODE_MESH_CONFIRMRCV);
2411 mesh_peer_timeout_setup(ni);
2412 break;
2413 case IEEE80211_NODE_MESH_HOLDING:
2414 args[0] = ni->ni_mlpid;
2415 args[1] = meshpeer->peer_llinkid;
2416 /* Standard not clear about what the reaason code should be */
2417 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2418 ieee80211_send_action(ni,
2419 IEEE80211_ACTION_CAT_SELF_PROT,
2420 IEEE80211_ACTION_MESHPEERING_CLOSE,
2421 args);
2422 break;
2423 case IEEE80211_NODE_MESH_CONFIRMRCV:
2424 if (ni->ni_mllid != meshpeer->peer_llinkid) {
2425 args[0] = ni->ni_mlpid;
2426 args[1] = ni->ni_mllid;
2427 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2428 ieee80211_send_action(ni,
2429 IEEE80211_ACTION_CAT_SELF_PROT,
2430 IEEE80211_ACTION_MESHPEERING_CLOSE,
2431 args);
2432 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2433 mesh_peer_timeout_setup(ni);
2434 }
2435 break;
2436 default:
2437 IEEE80211_DISCARD(vap,
2438 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2439 wh, NULL, "received confirm in invalid state %d",
2440 ni->ni_mlstate);
2441 vap->iv_stats.is_rx_mgtdiscard++;
2442 break;
2443 }
2444 return 0;
2445 }
2446
2447 static int
2448 mesh_recv_action_meshpeering_close(struct ieee80211_node *ni,
2449 const struct ieee80211_frame *wh,
2450 const uint8_t *frm, const uint8_t *efrm)
2451 {
2452 struct ieee80211_meshpeer_ie ie;
2453 const struct ieee80211_meshpeer_ie *meshpeer;
2454 uint16_t args[3];
2455
2456 /* +2 for action + code */
2457 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2, efrm, &ie,
2458 IEEE80211_ACTION_MESHPEERING_CLOSE);
2459 if (meshpeer == NULL) {
2460 return 0;
2461 }
2462
2463 /*
2464 * XXX: check reason code, for example we could receive
2465 * IEEE80211_REASON_MESH_MAX_PEERS then we should not attempt
2466 * to peer again.
2467 */
2468
2469 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2470 ni, "%s", "recv PEER CLOSE");
2471
2472 switch (ni->ni_mlstate) {
2473 case IEEE80211_NODE_MESH_IDLE:
2474 /* ignore */
2475 break;
2476 case IEEE80211_NODE_MESH_OPENRCV:
2477 case IEEE80211_NODE_MESH_OPENSNT:
2478 case IEEE80211_NODE_MESH_CONFIRMRCV:
2479 case IEEE80211_NODE_MESH_ESTABLISHED:
2480 args[0] = ni->ni_mlpid;
2481 args[1] = ni->ni_mllid;
2482 args[2] = IEEE80211_REASON_MESH_CLOSE_RCVD;
2483 ieee80211_send_action(ni,
2484 IEEE80211_ACTION_CAT_SELF_PROT,
2485 IEEE80211_ACTION_MESHPEERING_CLOSE,
2486 args);
2487 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2488 mesh_peer_timeout_setup(ni);
2489 break;
2490 case IEEE80211_NODE_MESH_HOLDING:
2491 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE);
2492 mesh_peer_timeout_stop(ni);
2493 break;
2494 }
2495 return 0;
2496 }
2497
2498 /*
2499 * Link Metric handling.
2500 */
2501 static int
2502 mesh_recv_action_meshlmetric(struct ieee80211_node *ni,
2503 const struct ieee80211_frame *wh,
2504 const uint8_t *frm, const uint8_t *efrm)
2505 {
2506 const struct ieee80211_meshlmetric_ie *ie =
2507 (const struct ieee80211_meshlmetric_ie *)
2508 (frm+2); /* action + code */
2509 struct ieee80211_meshlmetric_ie lm_rep;
2510
2511 if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) {
2512 lm_rep.lm_flags = 0;
2513 lm_rep.lm_metric = mesh_airtime_calc(ni);
2514 ieee80211_send_action(ni,
2515 IEEE80211_ACTION_CAT_MESH,
2516 IEEE80211_ACTION_MESH_LMETRIC,
2517 &lm_rep);
2518 }
2519 /* XXX: else do nothing for now */
2520 return 0;
2521 }
2522
2523 /*
2524 * Parse meshgate action ie's for GANN frames.
2525 * Returns -1 if parsing fails, otherwise 0.
2526 */
2527 static int
2528 mesh_parse_meshgate_action(struct ieee80211_node *ni,
2529 const struct ieee80211_frame *wh, /* XXX for VERIFY_LENGTH */
2530 struct ieee80211_meshgann_ie *ie, const uint8_t *frm, const uint8_t *efrm)
2531 {
2532 struct ieee80211vap *vap = ni->ni_vap;
2533 const struct ieee80211_meshgann_ie *gannie;
2534
2535 while (efrm - frm > 1) {
2536 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return -1);
2537 switch (*frm) {
2538 case IEEE80211_ELEMID_MESHGANN:
2539 gannie = (const struct ieee80211_meshgann_ie *) frm;
2540 memset(ie, 0, sizeof(*ie));
2541 ie->gann_ie = gannie->gann_ie;
2542 ie->gann_len = gannie->gann_len;
2543 ie->gann_flags = gannie->gann_flags;
2544 ie->gann_hopcount = gannie->gann_hopcount;
2545 ie->gann_ttl = gannie->gann_ttl;
2546 IEEE80211_ADDR_COPY(ie->gann_addr, gannie->gann_addr);
2547 ie->gann_seq = le32dec(&gannie->gann_seq);
2548 ie->gann_interval = le16dec(&gannie->gann_interval);
2549 break;
2550 }
2551 frm += frm[1] + 2;
2552 }
2553
2554 return 0;
2555 }
2556
2557 /*
2558 * Mesh Gate Announcement handling.
2559 */
2560 static int
2561 mesh_recv_action_meshgate(struct ieee80211_node *ni,
2562 const struct ieee80211_frame *wh,
2563 const uint8_t *frm, const uint8_t *efrm)
2564 {
2565 struct ieee80211vap *vap = ni->ni_vap;
2566 struct ieee80211_mesh_state *ms = vap->iv_mesh;
2567 struct ieee80211_mesh_gate_route *gr, *next;
2568 struct ieee80211_mesh_route *rt_gate;
2569 struct ieee80211_meshgann_ie pgann;
2570 struct ieee80211_meshgann_ie ie;
2571 int found = 0;
2572
2573 /* +2 for action + code */
2574 if (mesh_parse_meshgate_action(ni, wh, &ie, frm+2, efrm) != 0) {
2575 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
2576 ni->ni_macaddr, NULL, "%s",
2577 "GANN parsing failed");
2578 vap->iv_stats.is_rx_mgtdiscard++;
2579 return (0);
2580 }
2581
2582 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ie.gann_addr))
2583 return 0;
2584
2585 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ni->ni_macaddr,
2586 "received GANN, meshgate: %6D (seq %u)", ie.gann_addr, ":",
2587 ie.gann_seq);
2588
2589 if (ms == NULL)
2590 return (0);
2591 MESH_RT_LOCK(ms);
2592 TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) {
2593 if (!IEEE80211_ADDR_EQ(gr->gr_addr, ie.gann_addr))
2594 continue;
2595 if (ie.gann_seq <= gr->gr_lastseq) {
2596 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
2597 ni->ni_macaddr, NULL,
2598 "GANN old seqno %u <= %u",
2599 ie.gann_seq, gr->gr_lastseq);
2600 MESH_RT_UNLOCK(ms);
2601 return (0);
2602 }
2603 /* corresponding mesh gate found & GANN accepted */
2604 found = 1;
2605 break;
2606
2607 }
2608 if (found == 0) {
2609 /* this GANN is from a new mesh Gate add it to known table. */
2610 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie.gann_addr,
2611 "stored new GANN information, seq %u.", ie.gann_seq);
2612 gr = IEEE80211_MALLOC(ALIGN(sizeof(struct ieee80211_mesh_gate_route)),
2613 M_80211_MESH_GT_RT,
2614 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
2615 IEEE80211_ADDR_COPY(gr->gr_addr, ie.gann_addr);
2616 TAILQ_INSERT_TAIL(&ms->ms_known_gates, gr, gr_next);
2617 }
2618 gr->gr_lastseq = ie.gann_seq;
2619
2620 /* check if we have a path to this gate */
2621 rt_gate = mesh_rt_find_locked(ms, gr->gr_addr);
2622 if (rt_gate != NULL &&
2623 rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) {
2624 gr->gr_route = rt_gate;
2625 rt_gate->rt_flags |= IEEE80211_MESHRT_FLAGS_GATE;
2626 }
2627
2628 MESH_RT_UNLOCK(ms);
2629
2630 /* popagate only if decremented ttl >= 1 && forwarding is enabled */
2631 if ((ie.gann_ttl - 1) < 1 && !(ms->ms_flags & IEEE80211_MESHFLAGS_FWD))
2632 return 0;
2633 pgann.gann_flags = ie.gann_flags; /* Reserved */
2634 pgann.gann_hopcount = ie.gann_hopcount + 1;
2635 pgann.gann_ttl = ie.gann_ttl - 1;
2636 IEEE80211_ADDR_COPY(pgann.gann_addr, ie.gann_addr);
2637 pgann.gann_seq = ie.gann_seq;
2638 pgann.gann_interval = ie.gann_interval;
2639
2640 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie.gann_addr,
2641 "%s", "propagate GANN");
2642
2643 ieee80211_send_action(vap->iv_bss, IEEE80211_ACTION_CAT_MESH,
2644 IEEE80211_ACTION_MESH_GANN, &pgann);
2645
2646 return 0;
2647 }
2648
2649 static int
2650 mesh_send_action(struct ieee80211_node *ni,
2651 const uint8_t sa[IEEE80211_ADDR_LEN],
2652 const uint8_t da[IEEE80211_ADDR_LEN],
2653 struct mbuf *m)
2654 {
2655 struct ieee80211vap *vap = ni->ni_vap;
2656 struct ieee80211com *ic = ni->ni_ic;
2657 struct ieee80211_bpf_params params;
2658 int ret;
2659
2660 KASSERT(ni != NULL, ("null node"));
2661
2662 if (vap->iv_state == IEEE80211_S_CAC) {
2663 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT, ni,
2664 "block %s frame in CAC state", "Mesh action");
2665 vap->iv_stats.is_tx_badstate++;
2666 ieee80211_free_node(ni);
2667 m_freem(m);
2668 return EIO; /* XXX */
2669 }
2670
2671 M_PREPEND(m, sizeof(struct ieee80211_frame), M_NOWAIT);
2672 if (m == NULL) {
2673 ieee80211_free_node(ni);
2674 return ENOMEM;
2675 }
2676
2677 IEEE80211_TX_LOCK(ic);
2678 ieee80211_send_setup(ni, m,
2679 IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_ACTION,
2680 IEEE80211_NONQOS_TID, sa, da, sa);
2681 m->m_flags |= M_ENCAP; /* mark encapsulated */
2682
2683 memset(&params, 0, sizeof(params));
2684 params.ibp_pri = WME_AC_VO;
2685 params.ibp_rate0 = ni->ni_txparms->mgmtrate;
2686 if (IEEE80211_IS_MULTICAST(da))
2687 params.ibp_try0 = 1;
2688 else
2689 params.ibp_try0 = ni->ni_txparms->maxretry;
2690 params.ibp_power = ni->ni_txpower;
2691
2692 IEEE80211_NODE_STAT(ni, tx_mgmt);
2693
2694 ret = ieee80211_raw_output(vap, ni, m, &params);
2695 IEEE80211_TX_UNLOCK(ic);
2696 return (ret);
2697 }
2698
2699 #define ADDSHORT(frm, v) do { \
2700 frm[0] = (v) & 0xff; \
2701 frm[1] = (v) >> 8; \
2702 frm += 2; \
2703 } while (0)
2704 #define ADDWORD(frm, v) do { \
2705 frm[0] = (v) & 0xff; \
2706 frm[1] = ((v) >> 8) & 0xff; \
2707 frm[2] = ((v) >> 16) & 0xff; \
2708 frm[3] = ((v) >> 24) & 0xff; \
2709 frm += 4; \
2710 } while (0)
2711
2712 static int
2713 mesh_send_action_meshpeering_open(struct ieee80211_node *ni,
2714 int category, int action, void *args0)
2715 {
2716 struct ieee80211vap *vap = ni->ni_vap;
2717 struct ieee80211com *ic = ni->ni_ic;
2718 uint16_t *args = args0;
2719 const struct ieee80211_rateset *rs;
2720 struct mbuf *m;
2721 uint8_t *frm;
2722
2723 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2724 "send PEER OPEN action: localid 0x%x", args[0]);
2725
2726 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2727 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2728 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2729 ieee80211_ref_node(ni);
2730
2731 m = ieee80211_getmgtframe(&frm,
2732 ic->ic_headroom + sizeof(struct ieee80211_frame),
2733 sizeof(uint16_t) /* action+category */
2734 + sizeof(uint16_t) /* capabilites */
2735 + 2 + IEEE80211_RATE_SIZE
2736 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
2737 + 2 + IEEE80211_MESHID_LEN
2738 + sizeof(struct ieee80211_meshconf_ie)
2739 + sizeof(struct ieee80211_meshpeer_ie)
2740 );
2741 if (m != NULL) {
2742 /*
2743 * mesh peer open action frame format:
2744 * [1] category
2745 * [1] action
2746 * [2] capabilities
2747 * [tlv] rates
2748 * [tlv] xrates
2749 * [tlv] mesh id
2750 * [tlv] mesh conf
2751 * [tlv] mesh peer link mgmt
2752 */
2753 *frm++ = category;
2754 *frm++ = action;
2755 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan));
2756 rs = ieee80211_get_suprates(ic, ic->ic_curchan);
2757 frm = ieee80211_add_rates(frm, rs);
2758 frm = ieee80211_add_xrates(frm, rs);
2759 frm = ieee80211_add_meshid(frm, vap);
2760 frm = ieee80211_add_meshconf(frm, vap);
2761 frm = ieee80211_add_meshpeer(frm, IEEE80211_ACTION_MESHPEERING_OPEN,
2762 args[0], 0, 0);
2763 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2764 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m);
2765 } else {
2766 vap->iv_stats.is_tx_nobuf++;
2767 ieee80211_free_node(ni);
2768 return ENOMEM;
2769 }
2770 }
2771
2772 static int
2773 mesh_send_action_meshpeering_confirm(struct ieee80211_node *ni,
2774 int category, int action, void *args0)
2775 {
2776 struct ieee80211vap *vap = ni->ni_vap;
2777 struct ieee80211com *ic = ni->ni_ic;
2778 uint16_t *args = args0;
2779 const struct ieee80211_rateset *rs;
2780 struct mbuf *m;
2781 uint8_t *frm;
2782
2783 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2784 "send PEER CONFIRM action: localid 0x%x, peerid 0x%x",
2785 args[0], args[1]);
2786
2787 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2788 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2789 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2790 ieee80211_ref_node(ni);
2791
2792 m = ieee80211_getmgtframe(&frm,
2793 ic->ic_headroom + sizeof(struct ieee80211_frame),
2794 sizeof(uint16_t) /* action+category */
2795 + sizeof(uint16_t) /* capabilites */
2796 + sizeof(uint16_t) /* status code */
2797 + sizeof(uint16_t) /* AID */
2798 + 2 + IEEE80211_RATE_SIZE
2799 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
2800 + 2 + IEEE80211_MESHID_LEN
2801 + sizeof(struct ieee80211_meshconf_ie)
2802 + sizeof(struct ieee80211_meshpeer_ie)
2803 );
2804 if (m != NULL) {
2805 /*
2806 * mesh peer confirm action frame format:
2807 * [1] category
2808 * [1] action
2809 * [2] capabilities
2810 * [2] status code
2811 * [2] association id (peer ID)
2812 * [tlv] rates
2813 * [tlv] xrates
2814 * [tlv] mesh id
2815 * [tlv] mesh conf
2816 * [tlv] mesh peer link mgmt
2817 */
2818 *frm++ = category;
2819 *frm++ = action;
2820 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan));
2821 ADDSHORT(frm, 0); /* status code */
2822 ADDSHORT(frm, args[1]); /* AID */
2823 rs = ieee80211_get_suprates(ic, ic->ic_curchan);
2824 frm = ieee80211_add_rates(frm, rs);
2825 frm = ieee80211_add_xrates(frm, rs);
2826 frm = ieee80211_add_meshid(frm, vap);
2827 frm = ieee80211_add_meshconf(frm, vap);
2828 frm = ieee80211_add_meshpeer(frm,
2829 IEEE80211_ACTION_MESHPEERING_CONFIRM,
2830 args[0], args[1], 0);
2831 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2832 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m);
2833 } else {
2834 vap->iv_stats.is_tx_nobuf++;
2835 ieee80211_free_node(ni);
2836 return ENOMEM;
2837 }
2838 }
2839
2840 static int
2841 mesh_send_action_meshpeering_close(struct ieee80211_node *ni,
2842 int category, int action, void *args0)
2843 {
2844 struct ieee80211vap *vap = ni->ni_vap;
2845 struct ieee80211com *ic = ni->ni_ic;
2846 uint16_t *args = args0;
2847 struct mbuf *m;
2848 uint8_t *frm;
2849
2850 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2851 "send PEER CLOSE action: localid 0x%x, peerid 0x%x reason %d (%s)",
2852 args[0], args[1], args[2], ieee80211_reason_to_string(args[2]));
2853
2854 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2855 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2856 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2857 ieee80211_ref_node(ni);
2858
2859 m = ieee80211_getmgtframe(&frm,
2860 ic->ic_headroom + sizeof(struct ieee80211_frame),
2861 sizeof(uint16_t) /* action+category */
2862 + sizeof(uint16_t) /* reason code */
2863 + 2 + IEEE80211_MESHID_LEN
2864 + sizeof(struct ieee80211_meshpeer_ie)
2865 );
2866 if (m != NULL) {
2867 /*
2868 * mesh peer close action frame format:
2869 * [1] category
2870 * [1] action
2871 * [tlv] mesh id
2872 * [tlv] mesh peer link mgmt
2873 */
2874 *frm++ = category;
2875 *frm++ = action;
2876 frm = ieee80211_add_meshid(frm, vap);
2877 frm = ieee80211_add_meshpeer(frm,
2878 IEEE80211_ACTION_MESHPEERING_CLOSE,
2879 args[0], args[1], args[2]);
2880 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2881 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m);
2882 } else {
2883 vap->iv_stats.is_tx_nobuf++;
2884 ieee80211_free_node(ni);
2885 return ENOMEM;
2886 }
2887 }
2888
2889 static int
2890 mesh_send_action_meshlmetric(struct ieee80211_node *ni,
2891 int category, int action, void *arg0)
2892 {
2893 struct ieee80211vap *vap = ni->ni_vap;
2894 struct ieee80211com *ic = ni->ni_ic;
2895 struct ieee80211_meshlmetric_ie *ie = arg0;
2896 struct mbuf *m;
2897 uint8_t *frm;
2898
2899 if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) {
2900 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2901 ni, "%s", "send LINK METRIC REQUEST action");
2902 } else {
2903 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2904 ni, "send LINK METRIC REPLY action: metric 0x%x",
2905 ie->lm_metric);
2906 }
2907 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2908 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2909 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2910 ieee80211_ref_node(ni);
2911
2912 m = ieee80211_getmgtframe(&frm,
2913 ic->ic_headroom + sizeof(struct ieee80211_frame),
2914 sizeof(uint16_t) + /* action+category */
2915 sizeof(struct ieee80211_meshlmetric_ie)
2916 );
2917 if (m != NULL) {
2918 /*
2919 * mesh link metric
2920 * [1] category
2921 * [1] action
2922 * [tlv] mesh link metric
2923 */
2924 *frm++ = category;
2925 *frm++ = action;
2926 frm = ieee80211_add_meshlmetric(frm,
2927 ie->lm_flags, ie->lm_metric);
2928 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2929 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m);
2930 } else {
2931 vap->iv_stats.is_tx_nobuf++;
2932 ieee80211_free_node(ni);
2933 return ENOMEM;
2934 }
2935 }
2936
2937 static int
2938 mesh_send_action_meshgate(struct ieee80211_node *ni,
2939 int category, int action, void *arg0)
2940 {
2941 struct ieee80211vap *vap = ni->ni_vap;
2942 struct ieee80211com *ic = ni->ni_ic;
2943 struct ieee80211_meshgann_ie *ie = arg0;
2944 struct mbuf *m;
2945 uint8_t *frm;
2946
2947 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2948 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2949 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2950 ieee80211_ref_node(ni);
2951
2952 m = ieee80211_getmgtframe(&frm,
2953 ic->ic_headroom + sizeof(struct ieee80211_frame),
2954 sizeof(uint16_t) + /* action+category */
2955 IEEE80211_MESHGANN_BASE_SZ
2956 );
2957 if (m != NULL) {
2958 /*
2959 * mesh link metric
2960 * [1] category
2961 * [1] action
2962 * [tlv] mesh gate annoucement
2963 */
2964 *frm++ = category;
2965 *frm++ = action;
2966 frm = ieee80211_add_meshgate(frm, ie);
2967 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2968 return mesh_send_action(ni, vap->iv_myaddr, broadcastaddr, m);
2969 } else {
2970 vap->iv_stats.is_tx_nobuf++;
2971 ieee80211_free_node(ni);
2972 return ENOMEM;
2973 }
2974 }
2975
2976 static void
2977 mesh_peer_timeout_setup(struct ieee80211_node *ni)
2978 {
2979 switch (ni->ni_mlstate) {
2980 case IEEE80211_NODE_MESH_HOLDING:
2981 ni->ni_mltval = ieee80211_mesh_holdingtimeout;
2982 break;
2983 case IEEE80211_NODE_MESH_CONFIRMRCV:
2984 ni->ni_mltval = ieee80211_mesh_confirmtimeout;
2985 break;
2986 case IEEE80211_NODE_MESH_IDLE:
2987 ni->ni_mltval = 0;
2988 break;
2989 default:
2990 ni->ni_mltval = ieee80211_mesh_retrytimeout;
2991 break;
2992 }
2993 if (ni->ni_mltval)
2994 callout_reset(&ni->ni_mltimer, ni->ni_mltval,
2995 mesh_peer_timeout_cb, ni);
2996 }
2997
2998 /*
2999 * Same as above but backoffs timer statisically 50%.
3000 */
3001 static void
3002 mesh_peer_timeout_backoff(struct ieee80211_node *ni)
3003 {
3004 uint32_t r;
3005
3006 r = arc4random();
3007 ni->ni_mltval += r % ni->ni_mltval;
3008 callout_reset(&ni->ni_mltimer, ni->ni_mltval, mesh_peer_timeout_cb,
3009 ni);
3010 }
3011
3012 static __inline void
3013 mesh_peer_timeout_stop(struct ieee80211_node *ni)
3014 {
3015 callout_drain(&ni->ni_mltimer);
3016 }
3017
3018 static void
3019 mesh_peer_backoff_cb(void *arg)
3020 {
3021 struct ieee80211_node *ni = (struct ieee80211_node *)arg;
3022
3023 /* After backoff timeout, try to peer automatically again. */
3024 ni->ni_mlhcnt = 0;
3025 }
3026
3027 /*
3028 * Mesh Peer Link Management FSM timeout handling.
3029 */
3030 static void
3031 mesh_peer_timeout_cb(void *arg)
3032 {
3033 struct ieee80211_node *ni = (struct ieee80211_node *)arg;
3034 uint16_t args[3];
3035
3036 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_MESH,
3037 ni, "mesh link timeout, state %d, retry counter %d",
3038 ni->ni_mlstate, ni->ni_mlrcnt);
3039
3040 switch (ni->ni_mlstate) {
3041 case IEEE80211_NODE_MESH_IDLE:
3042 case IEEE80211_NODE_MESH_ESTABLISHED:
3043 break;
3044 case IEEE80211_NODE_MESH_OPENSNT:
3045 case IEEE80211_NODE_MESH_OPENRCV:
3046 if (ni->ni_mlrcnt == ieee80211_mesh_maxretries) {
3047 args[0] = ni->ni_mlpid;
3048 args[2] = IEEE80211_REASON_MESH_MAX_RETRIES;
3049 ieee80211_send_action(ni,
3050 IEEE80211_ACTION_CAT_SELF_PROT,
3051 IEEE80211_ACTION_MESHPEERING_CLOSE, args);
3052 ni->ni_mlrcnt = 0;
3053 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
3054 mesh_peer_timeout_setup(ni);
3055 } else {
3056 args[0] = ni->ni_mlpid;
3057 ieee80211_send_action(ni,
3058 IEEE80211_ACTION_CAT_SELF_PROT,
3059 IEEE80211_ACTION_MESHPEERING_OPEN, args);
3060 ni->ni_mlrcnt++;
3061 mesh_peer_timeout_backoff(ni);
3062 }
3063 break;
3064 case IEEE80211_NODE_MESH_CONFIRMRCV:
3065 args[0] = ni->ni_mlpid;
3066 args[2] = IEEE80211_REASON_MESH_CONFIRM_TIMEOUT;
3067 ieee80211_send_action(ni,
3068 IEEE80211_ACTION_CAT_SELF_PROT,
3069 IEEE80211_ACTION_MESHPEERING_CLOSE, args);
3070 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
3071 mesh_peer_timeout_setup(ni);
3072 break;
3073 case IEEE80211_NODE_MESH_HOLDING:
3074 ni->ni_mlhcnt++;
3075 if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding)
3076 callout_reset(&ni->ni_mlhtimer,
3077 ieee80211_mesh_backofftimeout,
3078 mesh_peer_backoff_cb, ni);
3079 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE);
3080 break;
3081 }
3082 }
3083
3084 static int
3085 mesh_verify_meshid(struct ieee80211vap *vap, const uint8_t *ie)
3086 {
3087 struct ieee80211_mesh_state *ms = vap->iv_mesh;
3088
3089 if (ie == NULL || ie[1] != ms->ms_idlen)
3090 return 1;
3091 return memcmp(ms->ms_id, ie + 2, ms->ms_idlen);
3092 }
3093
3094 /*
3095 * Check if we are using the same algorithms for this mesh.
3096 */
3097 static int
3098 mesh_verify_meshconf(struct ieee80211vap *vap, const uint8_t *ie)
3099 {
3100 const struct ieee80211_meshconf_ie *meshconf =
3101 (const struct ieee80211_meshconf_ie *) ie;
3102 const struct ieee80211_mesh_state *ms = vap->iv_mesh;
3103
3104 if (meshconf == NULL)
3105 return 1;
3106 if (meshconf->conf_pselid != ms->ms_ppath->mpp_ie) {
3107 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3108 "unknown path selection algorithm: 0x%x\n",
3109 meshconf->conf_pselid);
3110 return 1;
3111 }
3112 if (meshconf->conf_pmetid != ms->ms_pmetric->mpm_ie) {
3113 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3114 "unknown path metric algorithm: 0x%x\n",
3115 meshconf->conf_pmetid);
3116 return 1;
3117 }
3118 if (meshconf->conf_ccid != 0) {
3119 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3120 "unknown congestion control algorithm: 0x%x\n",
3121 meshconf->conf_ccid);
3122 return 1;
3123 }
3124 if (meshconf->conf_syncid != IEEE80211_MESHCONF_SYNC_NEIGHOFF) {
3125 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3126 "unknown sync algorithm: 0x%x\n",
3127 meshconf->conf_syncid);
3128 return 1;
3129 }
3130 if (meshconf->conf_authid != 0) {
3131 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3132 "unknown auth auth algorithm: 0x%x\n",
3133 meshconf->conf_pselid);
3134 return 1;
3135 }
3136 /* Not accepting peers */
3137 if (!(meshconf->conf_cap & IEEE80211_MESHCONF_CAP_AP)) {
3138 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3139 "not accepting peers: 0x%x\n", meshconf->conf_cap);
3140 return 1;
3141 }
3142 return 0;
3143 }
3144
3145 static int
3146 mesh_verify_meshpeer(struct ieee80211vap *vap, uint8_t subtype,
3147 const uint8_t *ie)
3148 {
3149 const struct ieee80211_meshpeer_ie *meshpeer =
3150 (const struct ieee80211_meshpeer_ie *) ie;
3151
3152 if (meshpeer == NULL ||
3153 meshpeer->peer_len < IEEE80211_MPM_BASE_SZ ||
3154 meshpeer->peer_len > IEEE80211_MPM_MAX_SZ)
3155 return 1;
3156 if (meshpeer->peer_proto != IEEE80211_MPPID_MPM) {
3157 IEEE80211_DPRINTF(vap,
3158 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
3159 "Only MPM protocol is supported (proto: 0x%02X)",
3160 meshpeer->peer_proto);
3161 return 1;
3162 }
3163 switch (subtype) {
3164 case IEEE80211_ACTION_MESHPEERING_OPEN:
3165 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ)
3166 return 1;
3167 break;
3168 case IEEE80211_ACTION_MESHPEERING_CONFIRM:
3169 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ + 2)
3170 return 1;
3171 break;
3172 case IEEE80211_ACTION_MESHPEERING_CLOSE:
3173 if (meshpeer->peer_len < IEEE80211_MPM_BASE_SZ + 2)
3174 return 1;
3175 if (meshpeer->peer_len == (IEEE80211_MPM_BASE_SZ + 2) &&
3176 meshpeer->peer_linkid != 0)
3177 return 1;
3178 if (meshpeer->peer_rcode == 0)
3179 return 1;
3180 break;
3181 }
3182 return 0;
3183 }
3184
3185 /*
3186 * Add a Mesh ID IE to a frame.
3187 */
3188 uint8_t *
3189 ieee80211_add_meshid(uint8_t *frm, struct ieee80211vap *vap)
3190 {
3191 struct ieee80211_mesh_state *ms = vap->iv_mesh;
3192
3193 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a mbss vap"));
3194
3195 *frm++ = IEEE80211_ELEMID_MESHID;
3196 *frm++ = ms->ms_idlen;
3197 memcpy(frm, ms->ms_id, ms->ms_idlen);
3198 return frm + ms->ms_idlen;
3199 }
3200
3201 /*
3202 * Add a Mesh Configuration IE to a frame.
3203 * For now just use HWMP routing, Airtime link metric, Null Congestion
3204 * Signaling, Null Sync Protocol and Null Authentication.
3205 */
3206 uint8_t *
3207 ieee80211_add_meshconf(uint8_t *frm, struct ieee80211vap *vap)
3208 {
3209 const struct ieee80211_mesh_state *ms = vap->iv_mesh;
3210 uint16_t caps;
3211
3212 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap"));
3213
3214 *frm++ = IEEE80211_ELEMID_MESHCONF;
3215 *frm++ = IEEE80211_MESH_CONF_SZ;
3216 *frm++ = ms->ms_ppath->mpp_ie; /* path selection */
3217 *frm++ = ms->ms_pmetric->mpm_ie; /* link metric */
3218 *frm++ = IEEE80211_MESHCONF_CC_DISABLED;
3219 *frm++ = IEEE80211_MESHCONF_SYNC_NEIGHOFF;
3220 *frm++ = IEEE80211_MESHCONF_AUTH_DISABLED;
3221 /* NB: set the number of neighbors before the rest */
3222 *frm = (ms->ms_neighbors > IEEE80211_MESH_MAX_NEIGHBORS ?
3223 IEEE80211_MESH_MAX_NEIGHBORS : ms->ms_neighbors) << 1;
3224 if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE)
3225 *frm |= IEEE80211_MESHCONF_FORM_GATE;
3226 frm += 1;
3227 caps = 0;
3228 if (ms->ms_flags & IEEE80211_MESHFLAGS_AP)
3229 caps |= IEEE80211_MESHCONF_CAP_AP;
3230 if (ms->ms_flags & IEEE80211_MESHFLAGS_FWD)
3231 caps |= IEEE80211_MESHCONF_CAP_FWRD;
3232 *frm++ = caps;
3233 return frm;
3234 }
3235
3236 /*
3237 * Add a Mesh Peer Management IE to a frame.
3238 */
3239 uint8_t *
3240 ieee80211_add_meshpeer(uint8_t *frm, uint8_t subtype, uint16_t localid,
3241 uint16_t peerid, uint16_t reason)
3242 {
3243
3244 KASSERT(localid != 0, ("localid == 0"));
3245
3246 *frm++ = IEEE80211_ELEMID_MESHPEER;
3247 switch (subtype) {
3248 case IEEE80211_ACTION_MESHPEERING_OPEN:
3249 *frm++ = IEEE80211_MPM_BASE_SZ; /* length */
3250 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */
3251 ADDSHORT(frm, localid); /* local ID */
3252 break;
3253 case IEEE80211_ACTION_MESHPEERING_CONFIRM:
3254 KASSERT(peerid != 0, ("sending peer confirm without peer id"));
3255 *frm++ = IEEE80211_MPM_BASE_SZ + 2; /* length */
3256 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */
3257 ADDSHORT(frm, localid); /* local ID */
3258 ADDSHORT(frm, peerid); /* peer ID */
3259 break;
3260 case IEEE80211_ACTION_MESHPEERING_CLOSE:
3261 if (peerid)
3262 *frm++ = IEEE80211_MPM_MAX_SZ; /* length */
3263 else
3264 *frm++ = IEEE80211_MPM_BASE_SZ + 2; /* length */
3265 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */
3266 ADDSHORT(frm, localid); /* local ID */
3267 if (peerid)
3268 ADDSHORT(frm, peerid); /* peer ID */
3269 ADDSHORT(frm, reason);
3270 break;
3271 }
3272 return frm;
3273 }
3274
3275 /*
3276 * Compute an Airtime Link Metric for the link with this node.
3277 *
3278 * Based on Draft 3.0 spec (11B.10, p.149).
3279 */
3280 /*
3281 * Max 802.11s overhead.
3282 */
3283 #define IEEE80211_MESH_MAXOVERHEAD \
3284 (sizeof(struct ieee80211_qosframe_addr4) \
3285 + sizeof(struct ieee80211_meshcntl_ae10) \
3286 + sizeof(struct llc) \
3287 + IEEE80211_ADDR_LEN \
3288 + IEEE80211_WEP_IVLEN \
3289 + IEEE80211_WEP_KIDLEN \
3290 + IEEE80211_WEP_CRCLEN \
3291 + IEEE80211_WEP_MICLEN \
3292 + IEEE80211_CRC_LEN)
3293 uint32_t
3294 mesh_airtime_calc(struct ieee80211_node *ni)
3295 {
3296 #define M_BITS 8
3297 #define S_FACTOR (2 * M_BITS)
3298 struct ieee80211com *ic = ni->ni_ic;
3299 struct ifnet *ifp = ni->ni_vap->iv_ifp;
3300 const static int nbits = 8192 << M_BITS;
3301 uint32_t overhead, rate, errrate;
3302 uint64_t res;
3303
3304 /* Time to transmit a frame */
3305 rate = ni->ni_txrate;
3306 overhead = ieee80211_compute_duration(ic->ic_rt,
3307 ifp->if_mtu + IEEE80211_MESH_MAXOVERHEAD, rate, 0) << M_BITS;
3308 /* Error rate in percentage */
3309 /* XXX assuming small failures are ok */
3310 errrate = (((ifp->if_get_counter(ifp, IFCOUNTER_OERRORS) +
3311 ifp->if_get_counter(ifp, IFCOUNTER_IERRORS)) / 100) << M_BITS)
3312 / 100;
3313 res = (overhead + (nbits / rate)) *
3314 ((1 << S_FACTOR) / ((1 << M_BITS) - errrate));
3315
3316 return (uint32_t)(res >> S_FACTOR);
3317 #undef M_BITS
3318 #undef S_FACTOR
3319 }
3320
3321 /*
3322 * Add a Mesh Link Metric report IE to a frame.
3323 */
3324 uint8_t *
3325 ieee80211_add_meshlmetric(uint8_t *frm, uint8_t flags, uint32_t metric)
3326 {
3327 *frm++ = IEEE80211_ELEMID_MESHLINK;
3328 *frm++ = 5;
3329 *frm++ = flags;
3330 ADDWORD(frm, metric);
3331 return frm;
3332 }
3333
3334 /*
3335 * Add a Mesh Gate Announcement IE to a frame.
3336 */
3337 uint8_t *
3338 ieee80211_add_meshgate(uint8_t *frm, struct ieee80211_meshgann_ie *ie)
3339 {
3340 *frm++ = IEEE80211_ELEMID_MESHGANN; /* ie */
3341 *frm++ = IEEE80211_MESHGANN_BASE_SZ; /* len */
3342 *frm++ = ie->gann_flags;
3343 *frm++ = ie->gann_hopcount;
3344 *frm++ = ie->gann_ttl;
3345 IEEE80211_ADDR_COPY(frm, ie->gann_addr);
3346 frm += 6;
3347 ADDWORD(frm, ie->gann_seq);
3348 ADDSHORT(frm, ie->gann_interval);
3349 return frm;
3350 }
3351 #undef ADDSHORT
3352 #undef ADDWORD
3353
3354 /*
3355 * Initialize any mesh-specific node state.
3356 */
3357 void
3358 ieee80211_mesh_node_init(struct ieee80211vap *vap, struct ieee80211_node *ni)
3359 {
3360 ni->ni_flags |= IEEE80211_NODE_QOS;
3361 callout_init(&ni->ni_mltimer, 1);
3362 callout_init(&ni->ni_mlhtimer, 1);
3363 }
3364
3365 /*
3366 * Cleanup any mesh-specific node state.
3367 */
3368 void
3369 ieee80211_mesh_node_cleanup(struct ieee80211_node *ni)
3370 {
3371 struct ieee80211vap *vap = ni->ni_vap;
3372 struct ieee80211_mesh_state *ms = vap->iv_mesh;
3373
3374 callout_drain(&ni->ni_mltimer);
3375 callout_drain(&ni->ni_mlhtimer);
3376 /* NB: short-circuit callbacks after mesh_vdetach */
3377 if (vap->iv_mesh != NULL)
3378 ms->ms_ppath->mpp_peerdown(ni);
3379 }
3380
3381 void
3382 ieee80211_parse_meshid(struct ieee80211_node *ni, const uint8_t *ie)
3383 {
3384 ni->ni_meshidlen = ie[1];
3385 memcpy(ni->ni_meshid, ie + 2, ie[1]);
3386 }
3387
3388 /*
3389 * Setup mesh-specific node state on neighbor discovery.
3390 */
3391 void
3392 ieee80211_mesh_init_neighbor(struct ieee80211_node *ni,
3393 const struct ieee80211_frame *wh,
3394 const struct ieee80211_scanparams *sp)
3395 {
3396 ieee80211_parse_meshid(ni, sp->meshid);
3397 }
3398
3399 void
3400 ieee80211_mesh_update_beacon(struct ieee80211vap *vap,
3401 struct ieee80211_beacon_offsets *bo)
3402 {
3403 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap"));
3404
3405 if (isset(bo->bo_flags, IEEE80211_BEACON_MESHCONF)) {
3406 (void)ieee80211_add_meshconf(bo->bo_meshconf, vap);
3407 clrbit(bo->bo_flags, IEEE80211_BEACON_MESHCONF);
3408 }
3409 }
3410
3411 static int
3412 mesh_ioctl_get80211(struct ieee80211vap *vap, struct ieee80211req *ireq)
3413 {
3414 struct ieee80211_mesh_state *ms = vap->iv_mesh;
3415 uint8_t tmpmeshid[IEEE80211_NWID_LEN];
3416 struct ieee80211_mesh_route *rt;
3417 struct ieee80211req_mesh_route *imr;
3418 size_t len, off;
3419 uint8_t *p;
3420 int error;
3421
3422 if (vap->iv_opmode != IEEE80211_M_MBSS)
3423 return ENOSYS;
3424
3425 error = 0;
3426 switch (ireq->i_type) {
3427 case IEEE80211_IOC_MESH_ID:
3428 ireq->i_len = ms->ms_idlen;
3429 memcpy(tmpmeshid, ms->ms_id, ireq->i_len);
3430 error = copyout(tmpmeshid, ireq->i_data, ireq->i_len);
3431 break;
3432 case IEEE80211_IOC_MESH_AP:
3433 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_AP) != 0;
3434 break;
3435 case IEEE80211_IOC_MESH_FWRD:
3436 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) != 0;
3437 break;
3438 case IEEE80211_IOC_MESH_GATE:
3439 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) != 0;
3440 break;
3441 case IEEE80211_IOC_MESH_TTL:
3442 ireq->i_val = ms->ms_ttl;
3443 break;
3444 case IEEE80211_IOC_MESH_RTCMD:
3445 switch (ireq->i_val) {
3446 case IEEE80211_MESH_RTCMD_LIST:
3447 len = 0;
3448 MESH_RT_LOCK(ms);
3449 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) {
3450 len += sizeof(*imr);
3451 }
3452 MESH_RT_UNLOCK(ms);
3453 if (len > ireq->i_len || ireq->i_len < sizeof(*imr)) {
3454 ireq->i_len = len;
3455 return ENOMEM;
3456 }
3457 ireq->i_len = len;
3458 /* XXX M_WAIT? */
3459 p = IEEE80211_MALLOC(len, M_TEMP,
3460 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
3461 if (p == NULL)
3462 return ENOMEM;
3463 off = 0;
3464 MESH_RT_LOCK(ms);
3465 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) {
3466 if (off >= len)
3467 break;
3468 imr = (struct ieee80211req_mesh_route *)
3469 (p + off);
3470 IEEE80211_ADDR_COPY(imr->imr_dest,
3471 rt->rt_dest);
3472 IEEE80211_ADDR_COPY(imr->imr_nexthop,
3473 rt->rt_nexthop);
3474 imr->imr_metric = rt->rt_metric;
3475 imr->imr_nhops = rt->rt_nhops;
3476 imr->imr_lifetime =
3477 ieee80211_mesh_rt_update(rt, 0);
3478 imr->imr_lastmseq = rt->rt_lastmseq;
3479 imr->imr_flags = rt->rt_flags; /* last */
3480 off += sizeof(*imr);
3481 }
3482 MESH_RT_UNLOCK(ms);
3483 error = copyout(p, (uint8_t *)ireq->i_data,
3484 ireq->i_len);
3485 IEEE80211_FREE(p, M_TEMP);
3486 break;
3487 case IEEE80211_MESH_RTCMD_FLUSH:
3488 case IEEE80211_MESH_RTCMD_ADD:
3489 case IEEE80211_MESH_RTCMD_DELETE:
3490 return EINVAL;
3491 default:
3492 return ENOSYS;
3493 }
3494 break;
3495 case IEEE80211_IOC_MESH_PR_METRIC:
3496 len = strlen(ms->ms_pmetric->mpm_descr);
3497 if (ireq->i_len < len)
3498 return EINVAL;
3499 ireq->i_len = len;
3500 error = copyout(ms->ms_pmetric->mpm_descr,
3501 (uint8_t *)ireq->i_data, len);
3502 break;
3503 case IEEE80211_IOC_MESH_PR_PATH:
3504 len = strlen(ms->ms_ppath->mpp_descr);
3505 if (ireq->i_len < len)
3506 return EINVAL;
3507 ireq->i_len = len;
3508 error = copyout(ms->ms_ppath->mpp_descr,
3509 (uint8_t *)ireq->i_data, len);
3510 break;
3511 default:
3512 return ENOSYS;
3513 }
3514
3515 return error;
3516 }
3517 IEEE80211_IOCTL_GET(mesh, mesh_ioctl_get80211);
3518
3519 static int
3520 mesh_ioctl_set80211(struct ieee80211vap *vap, struct ieee80211req *ireq)
3521 {
3522 struct ieee80211_mesh_state *ms = vap->iv_mesh;
3523 uint8_t tmpmeshid[IEEE80211_NWID_LEN];
3524 uint8_t tmpaddr[IEEE80211_ADDR_LEN];
3525 char tmpproto[IEEE80211_MESH_PROTO_DSZ];
3526 int error;
3527
3528 if (vap->iv_opmode != IEEE80211_M_MBSS)
3529 return ENOSYS;
3530
3531 error = 0;
3532 switch (ireq->i_type) {
3533 case IEEE80211_IOC_MESH_ID:
3534 if (ireq->i_val != 0 || ireq->i_len > IEEE80211_MESHID_LEN)
3535 return EINVAL;
3536 error = copyin(ireq->i_data, tmpmeshid, ireq->i_len);
3537 if (error != 0)
3538 break;
3539 memset(ms->ms_id, 0, IEEE80211_NWID_LEN);
3540 ms->ms_idlen = ireq->i_len;
3541 memcpy(ms->ms_id, tmpmeshid, ireq->i_len);
3542 error = ENETRESET;
3543 break;
3544 case IEEE80211_IOC_MESH_AP:
3545 if (ireq->i_val)
3546 ms->ms_flags |= IEEE80211_MESHFLAGS_AP;
3547 else
3548 ms->ms_flags &= ~IEEE80211_MESHFLAGS_AP;
3549 error = ENETRESET;
3550 break;
3551 case IEEE80211_IOC_MESH_FWRD:
3552 if (ireq->i_val)
3553 ms->ms_flags |= IEEE80211_MESHFLAGS_FWD;
3554 else
3555 ms->ms_flags &= ~IEEE80211_MESHFLAGS_FWD;
3556 mesh_gatemode_setup(vap);
3557 break;
3558 case IEEE80211_IOC_MESH_GATE:
3559 if (ireq->i_val)
3560 ms->ms_flags |= IEEE80211_MESHFLAGS_GATE;
3561 else
3562 ms->ms_flags &= ~IEEE80211_MESHFLAGS_GATE;
3563 break;
3564 case IEEE80211_IOC_MESH_TTL:
3565 ms->ms_ttl = (uint8_t) ireq->i_val;
3566 break;
3567 case IEEE80211_IOC_MESH_RTCMD:
3568 switch (ireq->i_val) {
3569 case IEEE80211_MESH_RTCMD_LIST:
3570 return EINVAL;
3571 case IEEE80211_MESH_RTCMD_FLUSH:
3572 ieee80211_mesh_rt_flush(vap);
3573 break;
3574 case IEEE80211_MESH_RTCMD_ADD:
3575 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ireq->i_data) ||
3576 IEEE80211_ADDR_EQ(broadcastaddr, ireq->i_data))
3577 return EINVAL;
3578 error = copyin(ireq->i_data, &tmpaddr,
3579 IEEE80211_ADDR_LEN);
3580 if (error == 0)
3581 ieee80211_mesh_discover(vap, tmpaddr, NULL);
3582 break;
3583 case IEEE80211_MESH_RTCMD_DELETE:
3584 ieee80211_mesh_rt_del(vap, ireq->i_data);
3585 break;
3586 default:
3587 return ENOSYS;
3588 }
3589 break;
3590 case IEEE80211_IOC_MESH_PR_METRIC:
3591 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto));
3592 if (error == 0) {
3593 error = mesh_select_proto_metric(vap, tmpproto);
3594 if (error == 0)
3595 error = ENETRESET;
3596 }
3597 break;
3598 case IEEE80211_IOC_MESH_PR_PATH:
3599 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto));
3600 if (error == 0) {
3601 error = mesh_select_proto_path(vap, tmpproto);
3602 if (error == 0)
3603 error = ENETRESET;
3604 }
3605 break;
3606 default:
3607 return ENOSYS;
3608 }
3609 return error;
3610 }
3611 IEEE80211_IOCTL_SET(mesh, mesh_ioctl_set80211);
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