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mdoc.7/MANUAL STRUCTURE: add HARDWARE
[freebsd/src.git] / sys / net80211 / ieee80211_mesh.c
blobc52122ebeb13d64f9edffd8a0fa17ed622a1e379
1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2009 The FreeBSD Foundation
5 *
6 * This software was developed by Rui Paulo under sponsorship from the
7 * FreeBSD Foundation.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 */
30
31 /*
32 * IEEE 802.11s Mesh Point (MBSS) support.
33 *
34 * Based on March 2009, D3.0 802.11s draft spec.
35 */
36 #include "opt_inet.h"
37 #include "opt_wlan.h"
38
39 #include <sys/param.h>
40 #include <sys/systm.h>
41 #include <sys/mbuf.h>
42 #include <sys/malloc.h>
43 #include <sys/kernel.h>
44
45 #include <sys/socket.h>
46 #include <sys/sockio.h>
47 #include <sys/endian.h>
48 #include <sys/errno.h>
49 #include <sys/proc.h>
50 #include <sys/sysctl.h>
51
52 #include <net/bpf.h>
53 #include <net/if.h>
54 #include <net/if_var.h>
55 #include <net/if_media.h>
56 #include <net/if_llc.h>
57 #include <net/if_private.h>
58 #include <net/ethernet.h>
59
60 #include <net80211/ieee80211_var.h>
61 #include <net80211/ieee80211_action.h>
62 #ifdef IEEE80211_SUPPORT_SUPERG
63 #include <net80211/ieee80211_superg.h>
64 #endif
65 #include <net80211/ieee80211_input.h>
66 #include <net80211/ieee80211_mesh.h>
67
68 static void mesh_rt_flush_invalid(struct ieee80211vap *);
69 static int mesh_select_proto_path(struct ieee80211vap *, const char *);
70 static int mesh_select_proto_metric(struct ieee80211vap *, const char *);
71 static void mesh_vattach(struct ieee80211vap *);
72 static int mesh_newstate(struct ieee80211vap *, enum ieee80211_state, int);
73 static void mesh_rt_cleanup_cb(void *);
74 static void mesh_gatemode_setup(struct ieee80211vap *);
75 static void mesh_gatemode_cb(void *);
76 static void mesh_linkchange(struct ieee80211_node *,
77 enum ieee80211_mesh_mlstate);
78 static void mesh_checkid(void *, struct ieee80211_node *);
79 static uint32_t mesh_generateid(struct ieee80211vap *);
80 static int mesh_checkpseq(struct ieee80211vap *,
81 const uint8_t [IEEE80211_ADDR_LEN], uint32_t);
82 static void mesh_transmit_to_gate(struct ieee80211vap *, struct mbuf *,
83 struct ieee80211_mesh_route *);
84 static void mesh_forward(struct ieee80211vap *, struct mbuf *,
85 const struct ieee80211_meshcntl *);
86 static int mesh_input(struct ieee80211_node *, struct mbuf *,
87 const struct ieee80211_rx_stats *rxs, int, int);
88 static void mesh_recv_mgmt(struct ieee80211_node *, struct mbuf *, int,
89 const struct ieee80211_rx_stats *rxs, int, int);
90 static void mesh_recv_ctl(struct ieee80211_node *, struct mbuf *, int);
91 static void mesh_peer_timeout_setup(struct ieee80211_node *);
92 static void mesh_peer_timeout_backoff(struct ieee80211_node *);
93 static void mesh_peer_timeout_cb(void *);
94 static __inline void
95 mesh_peer_timeout_stop(struct ieee80211_node *);
96 static int mesh_verify_meshid(struct ieee80211vap *, const uint8_t *);
97 static int mesh_verify_meshconf(struct ieee80211vap *, const uint8_t *);
98 static int mesh_verify_meshpeer(struct ieee80211vap *, uint8_t,
99 const uint8_t *);
100 uint32_t mesh_airtime_calc(struct ieee80211_node *);
101
102 /*
103 * Timeout values come from the specification and are in milliseconds.
104 */
105 static SYSCTL_NODE(_net_wlan, OID_AUTO, mesh, CTLFLAG_RD | CTLFLAG_MPSAFE, 0,
106 "IEEE 802.11s parameters");
107 static int ieee80211_mesh_gateint = -1;
108 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, gateint,
109 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
110 &ieee80211_mesh_gateint, 0, ieee80211_sysctl_msecs_ticks, "I",
111 "mesh gate interval (ms)");
112 static int ieee80211_mesh_retrytimeout = -1;
113 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, retrytimeout,
114 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
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,
120 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
121 &ieee80211_mesh_holdingtimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
122 "Holding state timeout (msec)");
123 static int ieee80211_mesh_confirmtimeout = -1;
124 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, confirmtimeout,
125 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
126 &ieee80211_mesh_confirmtimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
127 "Confirm state timeout (msec)");
128 static int ieee80211_mesh_backofftimeout = -1;
129 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, backofftimeout,
130 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
131 &ieee80211_mesh_backofftimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
132 "Backoff timeout (msec). This is to throutles peering forever when "
133 "not receiving answer or is rejected by a neighbor");
134 static int ieee80211_mesh_maxretries = 2;
135 SYSCTL_INT(_net_wlan_mesh, OID_AUTO, maxretries, CTLFLAG_RW,
136 &ieee80211_mesh_maxretries, 0,
137 "Maximum retries during peer link establishment");
138 static int ieee80211_mesh_maxholding = 2;
139 SYSCTL_INT(_net_wlan_mesh, OID_AUTO, maxholding, CTLFLAG_RW,
140 &ieee80211_mesh_maxholding, 0,
141 "Maximum times we are allowed to transition to HOLDING state before "
142 "backinoff during peer link establishment");
143
144 static const uint8_t broadcastaddr[IEEE80211_ADDR_LEN] =
145 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
146
147 static ieee80211_recv_action_func mesh_recv_action_meshpeering_open;
148 static ieee80211_recv_action_func mesh_recv_action_meshpeering_confirm;
149 static ieee80211_recv_action_func mesh_recv_action_meshpeering_close;
150 static ieee80211_recv_action_func mesh_recv_action_meshlmetric;
151 static ieee80211_recv_action_func mesh_recv_action_meshgate;
152
153 static ieee80211_send_action_func mesh_send_action_meshpeering_open;
154 static ieee80211_send_action_func mesh_send_action_meshpeering_confirm;
155 static ieee80211_send_action_func mesh_send_action_meshpeering_close;
156 static ieee80211_send_action_func mesh_send_action_meshlmetric;
157 static ieee80211_send_action_func mesh_send_action_meshgate;
158
159 static const struct ieee80211_mesh_proto_metric mesh_metric_airtime = {
160 .mpm_descr = "AIRTIME",
161 .mpm_ie = IEEE80211_MESHCONF_METRIC_AIRTIME,
162 .mpm_metric = mesh_airtime_calc,
163 };
164
165 static struct ieee80211_mesh_proto_path mesh_proto_paths[4];
166 static struct ieee80211_mesh_proto_metric mesh_proto_metrics[4];
167
168 MALLOC_DEFINE(M_80211_MESH_PREQ, "80211preq", "802.11 MESH Path Request frame");
169 MALLOC_DEFINE(M_80211_MESH_PREP, "80211prep", "802.11 MESH Path Reply frame");
170 MALLOC_DEFINE(M_80211_MESH_PERR, "80211perr", "802.11 MESH Path Error frame");
171
172 /* The longer one of the lifetime should be stored as new lifetime */
173 #define MESH_ROUTE_LIFETIME_MAX(a, b) (a > b ? a : b)
174
175 MALLOC_DEFINE(M_80211_MESH_RT, "80211mesh_rt", "802.11s routing table");
176 MALLOC_DEFINE(M_80211_MESH_GT_RT, "80211mesh_gt", "802.11s known gates table");
177
178 /*
179 * Helper functions to manipulate the Mesh routing table.
180 */
181
182 static struct ieee80211_mesh_route *
183 mesh_rt_find_locked(struct ieee80211_mesh_state *ms,
184 const uint8_t dest[IEEE80211_ADDR_LEN])
185 {
186 struct ieee80211_mesh_route *rt;
187
188 MESH_RT_LOCK_ASSERT(ms);
189
190 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) {
191 if (IEEE80211_ADDR_EQ(dest, rt->rt_dest))
192 return rt;
193 }
194 return NULL;
195 }
196
197 static struct ieee80211_mesh_route *
198 mesh_rt_add_locked(struct ieee80211vap *vap,
199 const uint8_t dest[IEEE80211_ADDR_LEN])
200 {
201 struct ieee80211_mesh_state *ms = vap->iv_mesh;
202 struct ieee80211_mesh_route *rt;
203
204 KASSERT(!IEEE80211_ADDR_EQ(broadcastaddr, dest),
205 ("%s: adding broadcast to the routing table", __func__));
206
207 MESH_RT_LOCK_ASSERT(ms);
208
209 rt = IEEE80211_MALLOC(ALIGN(sizeof(struct ieee80211_mesh_route)) +
210 ms->ms_ppath->mpp_privlen, M_80211_MESH_RT,
211 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
212 if (rt != NULL) {
213 rt->rt_vap = vap;
214 IEEE80211_ADDR_COPY(rt->rt_dest, dest);
215 rt->rt_priv = (void *)ALIGN(&rt[1]);
216 MESH_RT_ENTRY_LOCK_INIT(rt, "MBSS_RT");
217 callout_init(&rt->rt_discovery, 1);
218 rt->rt_updtime = ticks; /* create time */
219 TAILQ_INSERT_TAIL(&ms->ms_routes, rt, rt_next);
220 }
221 return rt;
222 }
223
224 struct ieee80211_mesh_route *
225 ieee80211_mesh_rt_find(struct ieee80211vap *vap,
226 const uint8_t dest[IEEE80211_ADDR_LEN])
227 {
228 struct ieee80211_mesh_state *ms = vap->iv_mesh;
229 struct ieee80211_mesh_route *rt;
230
231 MESH_RT_LOCK(ms);
232 rt = mesh_rt_find_locked(ms, dest);
233 MESH_RT_UNLOCK(ms);
234 return rt;
235 }
236
237 struct ieee80211_mesh_route *
238 ieee80211_mesh_rt_add(struct ieee80211vap *vap,
239 const uint8_t dest[IEEE80211_ADDR_LEN])
240 {
241 struct ieee80211_mesh_state *ms = vap->iv_mesh;
242 struct ieee80211_mesh_route *rt;
243
244 KASSERT(ieee80211_mesh_rt_find(vap, dest) == NULL,
245 ("%s: duplicate entry in the routing table", __func__));
246 KASSERT(!IEEE80211_ADDR_EQ(vap->iv_myaddr, dest),
247 ("%s: adding self to the routing table", __func__));
248
249 MESH_RT_LOCK(ms);
250 rt = mesh_rt_add_locked(vap, dest);
251 MESH_RT_UNLOCK(ms);
252 return rt;
253 }
254
255 /*
256 * Update the route lifetime and returns the updated lifetime.
257 * If new_lifetime is zero and route is timedout it will be invalidated.
258 * new_lifetime is in msec
259 */
260 int
261 ieee80211_mesh_rt_update(struct ieee80211_mesh_route *rt, int new_lifetime)
262 {
263 int timesince, now;
264 uint32_t lifetime = 0;
265
266 KASSERT(rt != NULL, ("route is NULL"));
267
268 now = ticks;
269 MESH_RT_ENTRY_LOCK(rt);
270
271 /* dont clobber a proxy entry gated by us */
272 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY && rt->rt_nhops == 0) {
273 MESH_RT_ENTRY_UNLOCK(rt);
274 return rt->rt_lifetime;
275 }
276
277 timesince = ticks_to_msecs(now - rt->rt_updtime);
278 rt->rt_updtime = now;
279 if (timesince >= rt->rt_lifetime) {
280 if (new_lifetime != 0) {
281 rt->rt_lifetime = new_lifetime;
282 }
283 else {
284 rt->rt_flags &= ~IEEE80211_MESHRT_FLAGS_VALID;
285 rt->rt_lifetime = 0;
286 }
287 } else {
288 /* update what is left of lifetime */
289 rt->rt_lifetime = rt->rt_lifetime - timesince;
290 rt->rt_lifetime = MESH_ROUTE_LIFETIME_MAX(
291 new_lifetime, rt->rt_lifetime);
292 }
293 lifetime = rt->rt_lifetime;
294 MESH_RT_ENTRY_UNLOCK(rt);
295
296 return lifetime;
297 }
298
299 /*
300 * Add a proxy route (as needed) for the specified destination.
301 */
302 void
303 ieee80211_mesh_proxy_check(struct ieee80211vap *vap,
304 const uint8_t dest[IEEE80211_ADDR_LEN])
305 {
306 struct ieee80211_mesh_state *ms = vap->iv_mesh;
307 struct ieee80211_mesh_route *rt;
308
309 MESH_RT_LOCK(ms);
310 rt = mesh_rt_find_locked(ms, dest);
311 if (rt == NULL) {
312 rt = mesh_rt_add_locked(vap, dest);
313 if (rt == NULL) {
314 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
315 "%s", "unable to add proxy entry");
316 vap->iv_stats.is_mesh_rtaddfailed++;
317 } else {
318 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
319 "%s", "add proxy entry");
320 IEEE80211_ADDR_COPY(rt->rt_mesh_gate, vap->iv_myaddr);
321 IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr);
322 rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID
323 | IEEE80211_MESHRT_FLAGS_PROXY;
324 }
325 } else if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) {
326 KASSERT(rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY,
327 ("no proxy flag for poxy entry"));
328 struct ieee80211com *ic = vap->iv_ic;
329 /*
330 * Fix existing entry created by received frames from
331 * stations that have some memory of dest. We also
332 * flush any frames held on the staging queue; delivering
333 * them is too much trouble right now.
334 */
335 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
336 "%s", "fix proxy entry");
337 IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr);
338 rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID
339 | IEEE80211_MESHRT_FLAGS_PROXY;
340 /* XXX belongs in hwmp */
341 ieee80211_ageq_drain_node(&ic->ic_stageq,
342 (void *)(uintptr_t) ieee80211_mac_hash(ic, dest));
343 /* XXX stat? */
344 }
345 MESH_RT_UNLOCK(ms);
346 }
347
348 static __inline void
349 mesh_rt_del(struct ieee80211_mesh_state *ms, struct ieee80211_mesh_route *rt)
350 {
351 TAILQ_REMOVE(&ms->ms_routes, rt, rt_next);
352 /*
353 * Grab the lock before destroying it, to be sure no one else
354 * is holding the route.
355 */
356 MESH_RT_ENTRY_LOCK(rt);
357 callout_drain(&rt->rt_discovery);
358 MESH_RT_ENTRY_LOCK_DESTROY(rt);
359 IEEE80211_FREE(rt, M_80211_MESH_RT);
360 }
361
362 void
363 ieee80211_mesh_rt_del(struct ieee80211vap *vap,
364 const uint8_t dest[IEEE80211_ADDR_LEN])
365 {
366 struct ieee80211_mesh_state *ms = vap->iv_mesh;
367 struct ieee80211_mesh_route *rt, *next;
368
369 MESH_RT_LOCK(ms);
370 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) {
371 if (IEEE80211_ADDR_EQ(rt->rt_dest, dest)) {
372 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) {
373 ms->ms_ppath->mpp_senderror(vap, dest, rt,
374 IEEE80211_REASON_MESH_PERR_NO_PROXY);
375 } else {
376 ms->ms_ppath->mpp_senderror(vap, dest, rt,
377 IEEE80211_REASON_MESH_PERR_DEST_UNREACH);
378 }
379 mesh_rt_del(ms, rt);
380 MESH_RT_UNLOCK(ms);
381 return;
382 }
383 }
384 MESH_RT_UNLOCK(ms);
385 }
386
387 void
388 ieee80211_mesh_rt_flush(struct ieee80211vap *vap)
389 {
390 struct ieee80211_mesh_state *ms = vap->iv_mesh;
391 struct ieee80211_mesh_route *rt, *next;
392
393 if (ms == NULL)
394 return;
395 MESH_RT_LOCK(ms);
396 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next)
397 mesh_rt_del(ms, rt);
398 MESH_RT_UNLOCK(ms);
399 }
400
401 void
402 ieee80211_mesh_rt_flush_peer(struct ieee80211vap *vap,
403 const uint8_t peer[IEEE80211_ADDR_LEN])
404 {
405 struct ieee80211_mesh_state *ms = vap->iv_mesh;
406 struct ieee80211_mesh_route *rt, *next;
407
408 MESH_RT_LOCK(ms);
409 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) {
410 if (IEEE80211_ADDR_EQ(rt->rt_nexthop, peer))
411 mesh_rt_del(ms, rt);
412 }
413 MESH_RT_UNLOCK(ms);
414 }
415
416 /*
417 * Flush expired routing entries, i.e. those in invalid state for
418 * some time.
419 */
420 static void
421 mesh_rt_flush_invalid(struct ieee80211vap *vap)
422 {
423 struct ieee80211_mesh_state *ms = vap->iv_mesh;
424 struct ieee80211_mesh_route *rt, *next;
425
426 if (ms == NULL)
427 return;
428 MESH_RT_LOCK(ms);
429 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) {
430 /* Discover paths will be deleted by their own callout */
431 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_DISCOVER)
432 continue;
433 ieee80211_mesh_rt_update(rt, 0);
434 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0)
435 mesh_rt_del(ms, rt);
436 }
437 MESH_RT_UNLOCK(ms);
438 }
439
440 int
441 ieee80211_mesh_register_proto_path(const struct ieee80211_mesh_proto_path *mpp)
442 {
443 int i, firstempty = -1;
444
445 for (i = 0; i < nitems(mesh_proto_paths); i++) {
446 if (strncmp(mpp->mpp_descr, mesh_proto_paths[i].mpp_descr,
447 IEEE80211_MESH_PROTO_DSZ) == 0)
448 return EEXIST;
449 if (!mesh_proto_paths[i].mpp_active && firstempty == -1)
450 firstempty = i;
451 }
452 if (firstempty < 0)
453 return ENOSPC;
454 memcpy(&mesh_proto_paths[firstempty], mpp, sizeof(*mpp));
455 mesh_proto_paths[firstempty].mpp_active = 1;
456 return 0;
457 }
458
459 int
460 ieee80211_mesh_register_proto_metric(const struct
461 ieee80211_mesh_proto_metric *mpm)
462 {
463 int i, firstempty = -1;
464
465 for (i = 0; i < nitems(mesh_proto_metrics); i++) {
466 if (strncmp(mpm->mpm_descr, mesh_proto_metrics[i].mpm_descr,
467 IEEE80211_MESH_PROTO_DSZ) == 0)
468 return EEXIST;
469 if (!mesh_proto_metrics[i].mpm_active && firstempty == -1)
470 firstempty = i;
471 }
472 if (firstempty < 0)
473 return ENOSPC;
474 memcpy(&mesh_proto_metrics[firstempty], mpm, sizeof(*mpm));
475 mesh_proto_metrics[firstempty].mpm_active = 1;
476 return 0;
477 }
478
479 static int
480 mesh_select_proto_path(struct ieee80211vap *vap, const char *name)
481 {
482 struct ieee80211_mesh_state *ms = vap->iv_mesh;
483 int i;
484
485 for (i = 0; i < nitems(mesh_proto_paths); i++) {
486 if (strcasecmp(mesh_proto_paths[i].mpp_descr, name) == 0) {
487 ms->ms_ppath = &mesh_proto_paths[i];
488 return 0;
489 }
490 }
491 return ENOENT;
492 }
493
494 static int
495 mesh_select_proto_metric(struct ieee80211vap *vap, const char *name)
496 {
497 struct ieee80211_mesh_state *ms = vap->iv_mesh;
498 int i;
499
500 for (i = 0; i < nitems(mesh_proto_metrics); i++) {
501 if (strcasecmp(mesh_proto_metrics[i].mpm_descr, name) == 0) {
502 ms->ms_pmetric = &mesh_proto_metrics[i];
503 return 0;
504 }
505 }
506 return ENOENT;
507 }
508
509 static void
510 mesh_gatemode_setup(struct ieee80211vap *vap)
511 {
512 struct ieee80211_mesh_state *ms = vap->iv_mesh;
513
514 /*
515 * NB: When a mesh gate is running as a ROOT it shall
516 * not send out periodic GANNs but instead mark the
517 * mesh gate flag for the corresponding proactive PREQ
518 * and RANN frames.
519 */
520 if (ms->ms_flags & IEEE80211_MESHFLAGS_ROOT ||
521 (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) == 0) {
522 callout_drain(&ms->ms_gatetimer);
523 return ;
524 }
525 callout_reset(&ms->ms_gatetimer, ieee80211_mesh_gateint,
526 mesh_gatemode_cb, vap);
527 }
528
529 static void
530 mesh_gatemode_cb(void *arg)
531 {
532 struct ieee80211vap *vap = (struct ieee80211vap *)arg;
533 struct ieee80211_mesh_state *ms = vap->iv_mesh;
534 struct ieee80211_meshgann_ie gann;
535
536 gann.gann_flags = 0; /* Reserved */
537 gann.gann_hopcount = 0;
538 gann.gann_ttl = ms->ms_ttl;
539 IEEE80211_ADDR_COPY(gann.gann_addr, vap->iv_myaddr);
540 gann.gann_seq = ms->ms_gateseq++;
541 gann.gann_interval = ieee80211_mesh_gateint;
542
543 IEEE80211_NOTE(vap, IEEE80211_MSG_MESH, vap->iv_bss,
544 "send broadcast GANN (seq %u)", gann.gann_seq);
545
546 ieee80211_send_action(vap->iv_bss, IEEE80211_ACTION_CAT_MESH,
547 IEEE80211_ACTION_MESH_GANN, &gann);
548 mesh_gatemode_setup(vap);
549 }
550
551 static void
552 ieee80211_mesh_init(void)
553 {
554
555 memset(mesh_proto_paths, 0, sizeof(mesh_proto_paths));
556 memset(mesh_proto_metrics, 0, sizeof(mesh_proto_metrics));
557
558 /*
559 * Setup mesh parameters that depends on the clock frequency.
560 */
561 ieee80211_mesh_gateint = msecs_to_ticks(10000);
562 ieee80211_mesh_retrytimeout = msecs_to_ticks(40);
563 ieee80211_mesh_holdingtimeout = msecs_to_ticks(40);
564 ieee80211_mesh_confirmtimeout = msecs_to_ticks(40);
565 ieee80211_mesh_backofftimeout = msecs_to_ticks(5000);
566
567 /*
568 * Register action frame handlers.
569 */
570 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
571 IEEE80211_ACTION_MESHPEERING_OPEN,
572 mesh_recv_action_meshpeering_open);
573 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
574 IEEE80211_ACTION_MESHPEERING_CONFIRM,
575 mesh_recv_action_meshpeering_confirm);
576 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
577 IEEE80211_ACTION_MESHPEERING_CLOSE,
578 mesh_recv_action_meshpeering_close);
579 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESH,
580 IEEE80211_ACTION_MESH_LMETRIC, mesh_recv_action_meshlmetric);
581 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESH,
582 IEEE80211_ACTION_MESH_GANN, mesh_recv_action_meshgate);
583
584 ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
585 IEEE80211_ACTION_MESHPEERING_OPEN,
586 mesh_send_action_meshpeering_open);
587 ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
588 IEEE80211_ACTION_MESHPEERING_CONFIRM,
589 mesh_send_action_meshpeering_confirm);
590 ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
591 IEEE80211_ACTION_MESHPEERING_CLOSE,
592 mesh_send_action_meshpeering_close);
593 ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESH,
594 IEEE80211_ACTION_MESH_LMETRIC,
595 mesh_send_action_meshlmetric);
596 ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESH,
597 IEEE80211_ACTION_MESH_GANN,
598 mesh_send_action_meshgate);
599
600 /*
601 * Register Airtime Link Metric.
602 */
603 ieee80211_mesh_register_proto_metric(&mesh_metric_airtime);
604
605 }
606 SYSINIT(wlan_mesh, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_mesh_init, NULL);
607
608 void
609 ieee80211_mesh_attach(struct ieee80211com *ic)
610 {
611 ic->ic_vattach[IEEE80211_M_MBSS] = mesh_vattach;
612 }
613
614 void
615 ieee80211_mesh_detach(struct ieee80211com *ic)
616 {
617 }
618
619 static void
620 mesh_vdetach_peers(void *arg, struct ieee80211_node *ni)
621 {
622 struct ieee80211com *ic = ni->ni_ic;
623 uint16_t args[3];
624
625 if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED) {
626 args[0] = ni->ni_mlpid;
627 args[1] = ni->ni_mllid;
628 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
629 ieee80211_send_action(ni,
630 IEEE80211_ACTION_CAT_SELF_PROT,
631 IEEE80211_ACTION_MESHPEERING_CLOSE,
632 args);
633 }
634 callout_drain(&ni->ni_mltimer);
635 /* XXX belongs in hwmp */
636 ieee80211_ageq_drain_node(&ic->ic_stageq,
637 (void *)(uintptr_t) ieee80211_mac_hash(ic, ni->ni_macaddr));
638 }
639
640 static void
641 mesh_vdetach(struct ieee80211vap *vap)
642 {
643 struct ieee80211_mesh_state *ms = vap->iv_mesh;
644
645 callout_drain(&ms->ms_cleantimer);
646 ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_vdetach_peers,
647 NULL);
648 ieee80211_mesh_rt_flush(vap);
649 MESH_RT_LOCK_DESTROY(ms);
650 ms->ms_ppath->mpp_vdetach(vap);
651 IEEE80211_FREE(vap->iv_mesh, M_80211_VAP);
652 vap->iv_mesh = NULL;
653 }
654
655 static void
656 mesh_vattach(struct ieee80211vap *vap)
657 {
658 struct ieee80211_mesh_state *ms;
659 vap->iv_newstate = mesh_newstate;
660 vap->iv_input = mesh_input;
661 vap->iv_opdetach = mesh_vdetach;
662 vap->iv_recv_mgmt = mesh_recv_mgmt;
663 vap->iv_recv_ctl = mesh_recv_ctl;
664 ms = IEEE80211_MALLOC(sizeof(struct ieee80211_mesh_state), M_80211_VAP,
665 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
666 if (ms == NULL) {
667 printf("%s: couldn't alloc MBSS state\n", __func__);
668 return;
669 }
670 vap->iv_mesh = ms;
671 ms->ms_seq = 0;
672 ms->ms_flags = (IEEE80211_MESHFLAGS_AP | IEEE80211_MESHFLAGS_FWD);
673 ms->ms_ttl = IEEE80211_MESH_DEFAULT_TTL;
674 TAILQ_INIT(&ms->ms_known_gates);
675 TAILQ_INIT(&ms->ms_routes);
676 MESH_RT_LOCK_INIT(ms, "MBSS");
677 callout_init(&ms->ms_cleantimer, 1);
678 callout_init(&ms->ms_gatetimer, 1);
679 ms->ms_gateseq = 0;
680 mesh_select_proto_metric(vap, "AIRTIME");
681 KASSERT(ms->ms_pmetric, ("ms_pmetric == NULL"));
682 mesh_select_proto_path(vap, "HWMP");
683 KASSERT(ms->ms_ppath, ("ms_ppath == NULL"));
684 ms->ms_ppath->mpp_vattach(vap);
685 }
686
687 /*
688 * IEEE80211_M_MBSS vap state machine handler.
689 */
690 static int
691 mesh_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
692 {
693 struct ieee80211_mesh_state *ms = vap->iv_mesh;
694 struct ieee80211com *ic = vap->iv_ic;
695 struct ieee80211_node *ni;
696 enum ieee80211_state ostate;
697
698 IEEE80211_LOCK_ASSERT(ic);
699
700 ostate = vap->iv_state;
701 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n",
702 __func__, ieee80211_state_name[ostate],
703 ieee80211_state_name[nstate], arg);
704 vap->iv_state = nstate; /* state transition */
705 if (ostate != IEEE80211_S_SCAN)
706 ieee80211_cancel_scan(vap); /* background scan */
707 ni = vap->iv_bss; /* NB: no reference held */
708 if (nstate != IEEE80211_S_RUN && ostate == IEEE80211_S_RUN) {
709 callout_drain(&ms->ms_cleantimer);
710 callout_drain(&ms->ms_gatetimer);
711 }
712 switch (nstate) {
713 case IEEE80211_S_INIT:
714 switch (ostate) {
715 case IEEE80211_S_SCAN:
716 ieee80211_cancel_scan(vap);
717 break;
718 case IEEE80211_S_CAC:
719 ieee80211_dfs_cac_stop(vap);
720 break;
721 case IEEE80211_S_RUN:
722 ieee80211_iterate_nodes(&ic->ic_sta,
723 mesh_vdetach_peers, NULL);
724 break;
725 default:
726 break;
727 }
728 if (ostate != IEEE80211_S_INIT) {
729 /* NB: optimize INIT -> INIT case */
730 ieee80211_reset_bss(vap);
731 ieee80211_mesh_rt_flush(vap);
732 }
733 break;
734 case IEEE80211_S_SCAN:
735 switch (ostate) {
736 case IEEE80211_S_INIT:
737 if (vap->iv_des_chan != IEEE80211_CHAN_ANYC &&
738 !IEEE80211_IS_CHAN_RADAR(vap->iv_des_chan) &&
739 ms->ms_idlen != 0) {
740 /*
741 * Already have a channel and a mesh ID; bypass
742 * the scan and startup immediately.
743 */
744 ieee80211_create_ibss(vap, vap->iv_des_chan);
745 break;
746 }
747 /*
748 * Initiate a scan. We can come here as a result
749 * of an IEEE80211_IOC_SCAN_REQ too in which case
750 * the vap will be marked with IEEE80211_FEXT_SCANREQ
751 * and the scan request parameters will be present
752 * in iv_scanreq. Otherwise we do the default.
753 */
754 if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) {
755 ieee80211_check_scan(vap,
756 vap->iv_scanreq_flags,
757 vap->iv_scanreq_duration,
758 vap->iv_scanreq_mindwell,
759 vap->iv_scanreq_maxdwell,
760 vap->iv_scanreq_nssid, vap->iv_scanreq_ssid);
761 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ;
762 } else
763 ieee80211_check_scan_current(vap);
764 break;
765 default:
766 break;
767 }
768 break;
769 case IEEE80211_S_CAC:
770 /*
771 * Start CAC on a DFS channel. We come here when starting
772 * a bss on a DFS channel (see ieee80211_create_ibss).
773 */
774 ieee80211_dfs_cac_start(vap);
775 break;
776 case IEEE80211_S_RUN:
777 switch (ostate) {
778 case IEEE80211_S_INIT:
779 /*
780 * Already have a channel; bypass the
781 * scan and startup immediately.
782 * Note that ieee80211_create_ibss will call
783 * back to do a RUN->RUN state change.
784 */
785 ieee80211_create_ibss(vap,
786 ieee80211_ht_adjust_channel(ic,
787 ic->ic_curchan, vap->iv_flags_ht));
788 /* NB: iv_bss is changed on return */
789 break;
790 case IEEE80211_S_CAC:
791 /*
792 * NB: This is the normal state change when CAC
793 * expires and no radar was detected; no need to
794 * clear the CAC timer as it's already expired.
795 */
796 /* fall thru... */
797 case IEEE80211_S_CSA:
798 #if 0
799 /*
800 * Shorten inactivity timer of associated stations
801 * to weed out sta's that don't follow a CSA.
802 */
803 ieee80211_iterate_nodes(&ic->ic_sta, sta_csa, vap);
804 #endif
805 /*
806 * Update bss node channel to reflect where
807 * we landed after CSA.
808 */
809 ieee80211_node_set_chan(ni,
810 ieee80211_ht_adjust_channel(ic, ic->ic_curchan,
811 ieee80211_htchanflags(ni->ni_chan)));
812 /* XXX bypass debug msgs */
813 break;
814 case IEEE80211_S_SCAN:
815 case IEEE80211_S_RUN:
816 #ifdef IEEE80211_DEBUG
817 if (ieee80211_msg_debug(vap)) {
818 ieee80211_note(vap,
819 "synchronized with %s meshid ",
820 ether_sprintf(ni->ni_meshid));
821 ieee80211_print_essid(ni->ni_meshid,
822 ni->ni_meshidlen);
823 /* XXX MCS/HT */
824 printf(" channel %d\n",
825 ieee80211_chan2ieee(ic, ic->ic_curchan));
826 }
827 #endif
828 break;
829 default:
830 break;
831 }
832 ieee80211_node_authorize(ni);
833 callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact,
834 mesh_rt_cleanup_cb, vap);
835 mesh_gatemode_setup(vap);
836 break;
837 default:
838 break;
839 }
840 /* NB: ostate not nstate */
841 ms->ms_ppath->mpp_newstate(vap, ostate, arg);
842 return 0;
843 }
844
845 static void
846 mesh_rt_cleanup_cb(void *arg)
847 {
848 struct ieee80211vap *vap = arg;
849 struct ieee80211_mesh_state *ms = vap->iv_mesh;
850
851 mesh_rt_flush_invalid(vap);
852 callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact,
853 mesh_rt_cleanup_cb, vap);
854 }
855
856 /*
857 * Mark a mesh STA as gate and return a pointer to it.
858 * If this is first time, we create a new gate route.
859 * Always update the path route to this mesh gate.
860 */
861 struct ieee80211_mesh_gate_route *
862 ieee80211_mesh_mark_gate(struct ieee80211vap *vap, const uint8_t *addr,
863 struct ieee80211_mesh_route *rt)
864 {
865 struct ieee80211_mesh_state *ms = vap->iv_mesh;
866 struct ieee80211_mesh_gate_route *gr = NULL, *next;
867 int found = 0;
868
869 MESH_RT_LOCK(ms);
870 TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) {
871 if (IEEE80211_ADDR_EQ(gr->gr_addr, addr)) {
872 found = 1;
873 break;
874 }
875 }
876
877 if (!found) {
878 /* New mesh gate add it to known table. */
879 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, addr,
880 "%s", "stored new gate information from pro-PREQ.");
881 gr = IEEE80211_MALLOC(ALIGN(sizeof(struct ieee80211_mesh_gate_route)),
882 M_80211_MESH_GT_RT,
883 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
884 IEEE80211_ADDR_COPY(gr->gr_addr, addr);
885 TAILQ_INSERT_TAIL(&ms->ms_known_gates, gr, gr_next);
886 }
887 gr->gr_route = rt;
888 /* TODO: link from path route to gate route */
889 MESH_RT_UNLOCK(ms);
890
891 return gr;
892 }
893
894 /*
895 * Helper function to note the Mesh Peer Link FSM change.
896 */
897 static void
898 mesh_linkchange(struct ieee80211_node *ni, enum ieee80211_mesh_mlstate state)
899 {
900 struct ieee80211vap *vap = ni->ni_vap;
901 struct ieee80211_mesh_state *ms = vap->iv_mesh;
902 #ifdef IEEE80211_DEBUG
903 static const char *meshlinkstates[] = {
904 [IEEE80211_NODE_MESH_IDLE] = "IDLE",
905 [IEEE80211_NODE_MESH_OPENSNT] = "OPEN SENT",
906 [IEEE80211_NODE_MESH_OPENRCV] = "OPEN RECEIVED",
907 [IEEE80211_NODE_MESH_CONFIRMRCV] = "CONFIRM RECEIVED",
908 [IEEE80211_NODE_MESH_ESTABLISHED] = "ESTABLISHED",
909 [IEEE80211_NODE_MESH_HOLDING] = "HOLDING"
910 };
911 #endif
912 IEEE80211_NOTE(vap, IEEE80211_MSG_MESH,
913 ni, "peer link: %s -> %s",
914 meshlinkstates[ni->ni_mlstate], meshlinkstates[state]);
915
916 /* track neighbor count */
917 if (state == IEEE80211_NODE_MESH_ESTABLISHED &&
918 ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) {
919 KASSERT(ms->ms_neighbors < 65535, ("neighbor count overflow"));
920 ms->ms_neighbors++;
921 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF);
922 } else if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED &&
923 state != IEEE80211_NODE_MESH_ESTABLISHED) {
924 KASSERT(ms->ms_neighbors > 0, ("neighbor count 0"));
925 ms->ms_neighbors--;
926 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF);
927 }
928 ni->ni_mlstate = state;
929 switch (state) {
930 case IEEE80211_NODE_MESH_HOLDING:
931 ms->ms_ppath->mpp_peerdown(ni);
932 break;
933 case IEEE80211_NODE_MESH_ESTABLISHED:
934 ieee80211_mesh_discover(vap, ni->ni_macaddr, NULL);
935 break;
936 default:
937 break;
938 }
939 }
940
941 /*
942 * Helper function to generate a unique local ID required for mesh
943 * peer establishment.
944 */
945 static void
946 mesh_checkid(void *arg, struct ieee80211_node *ni)
947 {
948 uint16_t *r = arg;
949
950 if (*r == ni->ni_mllid)
951 *(uint16_t *)arg = 0;
952 }
953
954 static uint32_t
955 mesh_generateid(struct ieee80211vap *vap)
956 {
957 int maxiter = 4;
958 uint16_t r;
959
960 do {
961 net80211_get_random_bytes(&r, 2);
962 ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_checkid, &r);
963 maxiter--;
964 } while (r == 0 && maxiter > 0);
965 return r;
966 }
967
968 /*
969 * Verifies if we already received this packet by checking its
970 * sequence number.
971 * Returns 0 if the frame is to be accepted, 1 otherwise.
972 */
973 static int
974 mesh_checkpseq(struct ieee80211vap *vap,
975 const uint8_t source[IEEE80211_ADDR_LEN], uint32_t seq)
976 {
977 struct ieee80211_mesh_route *rt;
978
979 rt = ieee80211_mesh_rt_find(vap, source);
980 if (rt == NULL) {
981 rt = ieee80211_mesh_rt_add(vap, source);
982 if (rt == NULL) {
983 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source,
984 "%s", "add mcast route failed");
985 vap->iv_stats.is_mesh_rtaddfailed++;
986 return 1;
987 }
988 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source,
989 "add mcast route, mesh seqno %d", seq);
990 rt->rt_lastmseq = seq;
991 return 0;
992 }
993 if (IEEE80211_MESH_SEQ_GEQ(rt->rt_lastmseq, seq)) {
994 return 1;
995 } else {
996 rt->rt_lastmseq = seq;
997 return 0;
998 }
999 }
1000
1001 /*
1002 * Iterate the routing table and locate the next hop.
1003 */
1004 struct ieee80211_node *
1005 ieee80211_mesh_find_txnode(struct ieee80211vap *vap,
1006 const uint8_t dest[IEEE80211_ADDR_LEN])
1007 {
1008 struct ieee80211_mesh_route *rt;
1009
1010 rt = ieee80211_mesh_rt_find(vap, dest);
1011 if (rt == NULL)
1012 return NULL;
1013 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) {
1014 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
1015 "%s: !valid, flags 0x%x", __func__, rt->rt_flags);
1016 /* XXX stat */
1017 return NULL;
1018 }
1019 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) {
1020 rt = ieee80211_mesh_rt_find(vap, rt->rt_mesh_gate);
1021 if (rt == NULL) return NULL;
1022 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) {
1023 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
1024 "%s: meshgate !valid, flags 0x%x", __func__,
1025 rt->rt_flags);
1026 /* XXX stat */
1027 return NULL;
1028 }
1029 }
1030 return ieee80211_find_txnode(vap, rt->rt_nexthop);
1031 }
1032
1033 static void
1034 mesh_transmit_to_gate(struct ieee80211vap *vap, struct mbuf *m,
1035 struct ieee80211_mesh_route *rt_gate)
1036 {
1037 struct ifnet *ifp = vap->iv_ifp;
1038 struct ieee80211_node *ni;
1039
1040 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
1041
1042 ni = ieee80211_mesh_find_txnode(vap, rt_gate->rt_dest);
1043 if (ni == NULL) {
1044 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
1045 m_freem(m);
1046 return;
1047 }
1048
1049 /*
1050 * Send through the VAP packet transmit path.
1051 * This consumes the node ref grabbed above and
1052 * the mbuf, regardless of whether there's a problem
1053 * or not.
1054 */
1055 (void) ieee80211_vap_pkt_send_dest(vap, m, ni);
1056 }
1057
1058 /*
1059 * Forward the queued frames to known valid mesh gates.
1060 * Assume destination to be outside the MBSS (i.e. proxy entry),
1061 * If no valid mesh gates are known silently discard queued frames.
1062 * After transmitting frames to all known valid mesh gates, this route
1063 * will be marked invalid, and a new path discovery will happen in the hopes
1064 * that (at least) one of the mesh gates have a new proxy entry for us to use.
1065 */
1066 void
1067 ieee80211_mesh_forward_to_gates(struct ieee80211vap *vap,
1068 struct ieee80211_mesh_route *rt_dest)
1069 {
1070 struct ieee80211com *ic = vap->iv_ic;
1071 struct ieee80211_mesh_state *ms = vap->iv_mesh;
1072 struct ieee80211_mesh_route *rt_gate;
1073 struct ieee80211_mesh_gate_route *gr = NULL, *gr_next;
1074 struct mbuf *m, *mcopy, *next;
1075
1076 IEEE80211_TX_UNLOCK_ASSERT(ic);
1077
1078 KASSERT( rt_dest->rt_flags == IEEE80211_MESHRT_FLAGS_DISCOVER,
1079 ("Route is not marked with IEEE80211_MESHRT_FLAGS_DISCOVER"));
1080
1081 /* XXX: send to more than one valid mash gate */
1082 MESH_RT_LOCK(ms);
1083
1084 m = ieee80211_ageq_remove(&ic->ic_stageq,
1085 (struct ieee80211_node *)(uintptr_t)
1086 ieee80211_mac_hash(ic, rt_dest->rt_dest));
1087
1088 TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, gr_next) {
1089 rt_gate = gr->gr_route;
1090 if (rt_gate == NULL) {
1091 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP,
1092 rt_dest->rt_dest,
1093 "mesh gate with no path %6D",
1094 gr->gr_addr, ":");
1095 continue;
1096 }
1097 if ((rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0)
1098 continue;
1099 KASSERT(rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_GATE,
1100 ("route not marked as a mesh gate"));
1101 KASSERT((rt_gate->rt_flags &
1102 IEEE80211_MESHRT_FLAGS_PROXY) == 0,
1103 ("found mesh gate that is also marked porxy"));
1104 /*
1105 * convert route to a proxy route gated by the current
1106 * mesh gate, this is needed so encap can built data
1107 * frame with correct address.
1108 */
1109 rt_dest->rt_flags = IEEE80211_MESHRT_FLAGS_PROXY |
1110 IEEE80211_MESHRT_FLAGS_VALID;
1111 rt_dest->rt_ext_seq = 1; /* random value */
1112 IEEE80211_ADDR_COPY(rt_dest->rt_mesh_gate, rt_gate->rt_dest);
1113 IEEE80211_ADDR_COPY(rt_dest->rt_nexthop, rt_gate->rt_nexthop);
1114 rt_dest->rt_metric = rt_gate->rt_metric;
1115 rt_dest->rt_nhops = rt_gate->rt_nhops;
1116 ieee80211_mesh_rt_update(rt_dest, ms->ms_ppath->mpp_inact);
1117 MESH_RT_UNLOCK(ms);
1118 /* XXX: lock?? */
1119 mcopy = m_dup(m, IEEE80211_M_NOWAIT);
1120 for (; mcopy != NULL; mcopy = next) {
1121 next = mcopy->m_nextpkt;
1122 mcopy->m_nextpkt = NULL;
1123 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP,
1124 rt_dest->rt_dest,
1125 "flush queued frame %p len %d", mcopy,
1126 mcopy->m_pkthdr.len);
1127 mesh_transmit_to_gate(vap, mcopy, rt_gate);
1128 }
1129 MESH_RT_LOCK(ms);
1130 }
1131 rt_dest->rt_flags = 0; /* Mark invalid */
1132 m_freem(m);
1133 MESH_RT_UNLOCK(ms);
1134 }
1135
1136 /*
1137 * Forward the specified frame.
1138 * Decrement the TTL and set TA to our MAC address.
1139 */
1140 static void
1141 mesh_forward(struct ieee80211vap *vap, struct mbuf *m,
1142 const struct ieee80211_meshcntl *mc)
1143 {
1144 struct ieee80211com *ic = vap->iv_ic;
1145 struct ieee80211_mesh_state *ms = vap->iv_mesh;
1146 struct ifnet *ifp = vap->iv_ifp;
1147 const struct ieee80211_frame *wh =
1148 mtod(m, const struct ieee80211_frame *);
1149 struct mbuf *mcopy;
1150 struct ieee80211_meshcntl *mccopy;
1151 struct ieee80211_frame *whcopy;
1152 struct ieee80211_node *ni;
1153 int err;
1154
1155 /* This is called from the RX path - don't hold this lock */
1156 IEEE80211_TX_UNLOCK_ASSERT(ic);
1157
1158 /*
1159 * mesh ttl of 1 means we are the last one receiving it,
1160 * according to amendment we decrement and then check if
1161 * 0, if so we dont forward.
1162 */
1163 if (mc->mc_ttl < 1) {
1164 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1165 "%s", "frame not fwd'd, ttl 1");
1166 vap->iv_stats.is_mesh_fwd_ttl++;
1167 return;
1168 }
1169 if (!(ms->ms_flags & IEEE80211_MESHFLAGS_FWD)) {
1170 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1171 "%s", "frame not fwd'd, fwding disabled");
1172 vap->iv_stats.is_mesh_fwd_disabled++;
1173 return;
1174 }
1175 mcopy = m_dup(m, IEEE80211_M_NOWAIT);
1176 if (mcopy == NULL) {
1177 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1178 "%s", "frame not fwd'd, cannot dup");
1179 vap->iv_stats.is_mesh_fwd_nobuf++;
1180 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
1181 return;
1182 }
1183 mcopy = m_pullup(mcopy, ieee80211_hdrspace(ic, wh) +
1184 sizeof(struct ieee80211_meshcntl));
1185 if (mcopy == NULL) {
1186 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1187 "%s", "frame not fwd'd, too short");
1188 vap->iv_stats.is_mesh_fwd_tooshort++;
1189 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
1190 m_freem(mcopy);
1191 return;
1192 }
1193 whcopy = mtod(mcopy, struct ieee80211_frame *);
1194 mccopy = (struct ieee80211_meshcntl *)
1195 (mtod(mcopy, uint8_t *) + ieee80211_hdrspace(ic, wh));
1196 /* XXX clear other bits? */
1197 whcopy->i_fc[1] &= ~IEEE80211_FC1_RETRY;
1198 IEEE80211_ADDR_COPY(whcopy->i_addr2, vap->iv_myaddr);
1199 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1200 ni = ieee80211_ref_node(vap->iv_bss);
1201 mcopy->m_flags |= M_MCAST;
1202 } else {
1203 ni = ieee80211_mesh_find_txnode(vap, whcopy->i_addr3);
1204 if (ni == NULL) {
1205 /*
1206 * [Optional] any of the following three actions:
1207 * o silently discard
1208 * o trigger a path discovery
1209 * o inform TA that meshDA is unknown.
1210 */
1211 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1212 "%s", "frame not fwd'd, no path");
1213 ms->ms_ppath->mpp_senderror(vap, whcopy->i_addr3, NULL,
1214 IEEE80211_REASON_MESH_PERR_NO_FI);
1215 vap->iv_stats.is_mesh_fwd_nopath++;
1216 m_freem(mcopy);
1217 return;
1218 }
1219 IEEE80211_ADDR_COPY(whcopy->i_addr1, ni->ni_macaddr);
1220 }
1221 KASSERT(mccopy->mc_ttl > 0, ("%s called with wrong ttl", __func__));
1222 mccopy->mc_ttl--;
1223
1224 /* XXX calculate priority so drivers can find the tx queue */
1225 M_WME_SETAC(mcopy, WME_AC_BE);
1226
1227 /* XXX do we know m_nextpkt is NULL? */
1228 MPASS((mcopy->m_pkthdr.csum_flags & CSUM_SND_TAG) == 0);
1229 mcopy->m_pkthdr.rcvif = (void *) ni;
1230
1231 /*
1232 * XXX this bypasses all of the VAP TX handling; it passes frames
1233 * directly to the parent interface.
1234 *
1235 * Because of this, there's no TX lock being held as there's no
1236 * encaps state being used.
1237 *
1238 * Doing a direct parent transmit may not be the correct thing
1239 * to do here; we'll have to re-think this soon.
1240 */
1241 IEEE80211_TX_LOCK(ic);
1242 err = ieee80211_parent_xmitpkt(ic, mcopy);
1243 IEEE80211_TX_UNLOCK(ic);
1244 if (!err)
1245 if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1);
1246 }
1247
1248 static struct mbuf *
1249 mesh_decap(struct ieee80211vap *vap, struct mbuf *m, int hdrlen, int meshdrlen)
1250 {
1251 #define WHDIR(wh) ((wh)->i_fc[1] & IEEE80211_FC1_DIR_MASK)
1252 #define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc)
1253 uint8_t b[sizeof(struct ieee80211_qosframe_addr4) +
1254 sizeof(struct ieee80211_meshcntl_ae10)];
1255 const struct ieee80211_qosframe_addr4 *wh;
1256 const struct ieee80211_meshcntl_ae10 *mc;
1257 struct ether_header *eh;
1258 struct llc *llc;
1259 int ae;
1260
1261 if (m->m_len < hdrlen + sizeof(*llc) &&
1262 (m = m_pullup(m, hdrlen + sizeof(*llc))) == NULL) {
1263 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ANY,
1264 "discard data frame: %s", "m_pullup failed");
1265 vap->iv_stats.is_rx_tooshort++;
1266 return NULL;
1267 }
1268 memcpy(b, mtod(m, caddr_t), hdrlen);
1269 wh = (const struct ieee80211_qosframe_addr4 *)&b[0];
1270 mc = (const struct ieee80211_meshcntl_ae10 *)&b[hdrlen - meshdrlen];
1271 KASSERT(WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS ||
1272 WHDIR(wh) == IEEE80211_FC1_DIR_DSTODS,
1273 ("bogus dir, fc 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1]));
1274
1275 llc = (struct llc *)(mtod(m, caddr_t) + hdrlen);
1276 if (llc->llc_dsap == LLC_SNAP_LSAP && llc->llc_ssap == LLC_SNAP_LSAP &&
1277 llc->llc_control == LLC_UI && llc->llc_snap.org_code[0] == 0 &&
1278 llc->llc_snap.org_code[1] == 0 && llc->llc_snap.org_code[2] == 0 &&
1279 /* NB: preserve AppleTalk frames that have a native SNAP hdr */
1280 !(llc->llc_snap.ether_type == htons(ETHERTYPE_AARP) ||
1281 llc->llc_snap.ether_type == htons(ETHERTYPE_IPX))) {
1282 m_adj(m, hdrlen + sizeof(struct llc) - sizeof(*eh));
1283 llc = NULL;
1284 } else {
1285 m_adj(m, hdrlen - sizeof(*eh));
1286 }
1287 eh = mtod(m, struct ether_header *);
1288 ae = mc->mc_flags & IEEE80211_MESH_AE_MASK;
1289 if (WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS) {
1290 IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr1);
1291 if (ae == IEEE80211_MESH_AE_00) {
1292 IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr3);
1293 } else if (ae == IEEE80211_MESH_AE_01) {
1294 IEEE80211_ADDR_COPY(eh->ether_shost,
1295 MC01(mc)->mc_addr4);
1296 } else {
1297 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1298 (const struct ieee80211_frame *)wh, NULL,
1299 "bad AE %d", ae);
1300 vap->iv_stats.is_mesh_badae++;
1301 m_freem(m);
1302 return NULL;
1303 }
1304 } else {
1305 if (ae == IEEE80211_MESH_AE_00) {
1306 IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr3);
1307 IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr4);
1308 } else if (ae == IEEE80211_MESH_AE_10) {
1309 IEEE80211_ADDR_COPY(eh->ether_dhost, mc->mc_addr5);
1310 IEEE80211_ADDR_COPY(eh->ether_shost, mc->mc_addr6);
1311 } else {
1312 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1313 (const struct ieee80211_frame *)wh, NULL,
1314 "bad AE %d", ae);
1315 vap->iv_stats.is_mesh_badae++;
1316 m_freem(m);
1317 return NULL;
1318 }
1319 }
1320 #ifndef __NO_STRICT_ALIGNMENT
1321 if (!ALIGNED_POINTER(mtod(m, caddr_t) + sizeof(*eh), uint32_t)) {
1322 m = ieee80211_realign(vap, m, sizeof(*eh));
1323 if (m == NULL)
1324 return NULL;
1325 }
1326 #endif /* !__NO_STRICT_ALIGNMENT */
1327 if (llc != NULL) {
1328 eh = mtod(m, struct ether_header *);
1329 eh->ether_type = htons(m->m_pkthdr.len - sizeof(*eh));
1330 }
1331 return m;
1332 #undef WDIR
1333 #undef MC01
1334 }
1335
1336 /*
1337 * Return non-zero if the unicast mesh data frame should be processed
1338 * locally. Frames that are not proxy'd have our address, otherwise
1339 * we need to consult the routing table to look for a proxy entry.
1340 */
1341 static __inline int
1342 mesh_isucastforme(struct ieee80211vap *vap, const struct ieee80211_frame *wh,
1343 const struct ieee80211_meshcntl *mc)
1344 {
1345 int ae = mc->mc_flags & 3;
1346
1347 KASSERT((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) == IEEE80211_FC1_DIR_DSTODS,
1348 ("bad dir 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1]));
1349 KASSERT(ae == IEEE80211_MESH_AE_00 || ae == IEEE80211_MESH_AE_10,
1350 ("bad AE %d", ae));
1351 if (ae == IEEE80211_MESH_AE_10) { /* ucast w/ proxy */
1352 const struct ieee80211_meshcntl_ae10 *mc10 =
1353 (const struct ieee80211_meshcntl_ae10 *) mc;
1354 struct ieee80211_mesh_route *rt =
1355 ieee80211_mesh_rt_find(vap, mc10->mc_addr5);
1356 /* check for proxy route to ourself */
1357 return (rt != NULL &&
1358 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY));
1359 } else /* ucast w/o proxy */
1360 return IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_myaddr);
1361 }
1362
1363 /*
1364 * Verifies transmitter, updates lifetime, precursor list and forwards data.
1365 * > 0 means we have forwarded data and no need to process locally
1366 * == 0 means we want to process locally (and we may have forwarded data
1367 * < 0 means there was an error and data should be discarded
1368 */
1369 static int
1370 mesh_recv_indiv_data_to_fwrd(struct ieee80211vap *vap, struct mbuf *m,
1371 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc)
1372 {
1373 struct ieee80211_qosframe_addr4 *qwh;
1374 struct ieee80211_mesh_state *ms = vap->iv_mesh;
1375 struct ieee80211_mesh_route *rt_meshda, *rt_meshsa;
1376
1377 /* This is called from the RX path - don't hold this lock */
1378 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
1379
1380 qwh = (struct ieee80211_qosframe_addr4 *)wh;
1381
1382 /*
1383 * TODO:
1384 * o verify addr2 is a legitimate transmitter
1385 * o lifetime of precursor of addr3 (addr2) is max(init, curr)
1386 * o lifetime of precursor of addr4 (nexthop) is max(init, curr)
1387 */
1388
1389 /* set lifetime of addr3 (meshDA) to initial value */
1390 rt_meshda = ieee80211_mesh_rt_find(vap, qwh->i_addr3);
1391 if (rt_meshda == NULL) {
1392 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, qwh->i_addr2,
1393 "no route to meshDA(%6D)", qwh->i_addr3, ":");
1394 /*
1395 * [Optional] any of the following three actions:
1396 * o silently discard [X]
1397 * o trigger a path discovery [ ]
1398 * o inform TA that meshDA is unknown. [ ]
1399 */
1400 /* XXX: stats */
1401 return (-1);
1402 }
1403
1404 ieee80211_mesh_rt_update(rt_meshda, ticks_to_msecs(
1405 ms->ms_ppath->mpp_inact));
1406
1407 /* set lifetime of addr4 (meshSA) to initial value */
1408 rt_meshsa = ieee80211_mesh_rt_find(vap, qwh->i_addr4);
1409 KASSERT(rt_meshsa != NULL, ("no route"));
1410 ieee80211_mesh_rt_update(rt_meshsa, ticks_to_msecs(
1411 ms->ms_ppath->mpp_inact));
1412
1413 mesh_forward(vap, m, mc);
1414 return (1); /* dont process locally */
1415 }
1416
1417 /*
1418 * Verifies transmitter, updates lifetime, precursor list and process data
1419 * locally, if data is proxy with AE = 10 it could mean data should go
1420 * on another mesh path or data should be forwarded to the DS.
1421 *
1422 * > 0 means we have forwarded data and no need to process locally
1423 * == 0 means we want to process locally (and we may have forwarded data
1424 * < 0 means there was an error and data should be discarded
1425 */
1426 static int
1427 mesh_recv_indiv_data_to_me(struct ieee80211vap *vap, struct mbuf *m,
1428 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc)
1429 {
1430 struct ieee80211_qosframe_addr4 *qwh;
1431 const struct ieee80211_meshcntl_ae10 *mc10;
1432 struct ieee80211_mesh_state *ms = vap->iv_mesh;
1433 struct ieee80211_mesh_route *rt;
1434 int ae;
1435
1436 /* This is called from the RX path - don't hold this lock */
1437 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
1438
1439 qwh = (struct ieee80211_qosframe_addr4 *)wh;
1440 mc10 = (const struct ieee80211_meshcntl_ae10 *)mc;
1441
1442 /*
1443 * TODO:
1444 * o verify addr2 is a legitimate transmitter
1445 * o lifetime of precursor entry is max(init, curr)
1446 */
1447
1448 /* set lifetime of addr4 (meshSA) to initial value */
1449 rt = ieee80211_mesh_rt_find(vap, qwh->i_addr4);
1450 KASSERT(rt != NULL, ("no route"));
1451 ieee80211_mesh_rt_update(rt, ticks_to_msecs(ms->ms_ppath->mpp_inact));
1452 rt = NULL;
1453
1454 ae = mc10->mc_flags & IEEE80211_MESH_AE_MASK;
1455 KASSERT(ae == IEEE80211_MESH_AE_00 ||
1456 ae == IEEE80211_MESH_AE_10, ("bad AE %d", ae));
1457 if (ae == IEEE80211_MESH_AE_10) {
1458 if (IEEE80211_ADDR_EQ(mc10->mc_addr5, qwh->i_addr3)) {
1459 return (0); /* process locally */
1460 }
1461
1462 rt = ieee80211_mesh_rt_find(vap, mc10->mc_addr5);
1463 if (rt != NULL &&
1464 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) &&
1465 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) == 0) {
1466 /*
1467 * Forward on another mesh-path, according to
1468 * amendment as specified in 9.32.4.1
1469 */
1470 IEEE80211_ADDR_COPY(qwh->i_addr3, mc10->mc_addr5);
1471 mesh_forward(vap, m,
1472 (const struct ieee80211_meshcntl *)mc10);
1473 return (1); /* dont process locally */
1474 }
1475 /*
1476 * All other cases: forward of MSDUs from the MBSS to DS indiv.
1477 * addressed according to 13.11.3.2.
1478 */
1479 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, qwh->i_addr2,
1480 "forward frame to DS, SA(%6D) DA(%6D)",
1481 mc10->mc_addr6, ":", mc10->mc_addr5, ":");
1482 }
1483 return (0); /* process locally */
1484 }
1485
1486 /*
1487 * Try to forward the group addressed data on to other mesh STAs, and
1488 * also to the DS.
1489 *
1490 * > 0 means we have forwarded data and no need to process locally
1491 * == 0 means we want to process locally (and we may have forwarded data
1492 * < 0 means there was an error and data should be discarded
1493 */
1494 static int
1495 mesh_recv_group_data(struct ieee80211vap *vap, struct mbuf *m,
1496 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc)
1497 {
1498 #define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc)
1499 struct ieee80211_mesh_state *ms = vap->iv_mesh;
1500
1501 /* This is called from the RX path - don't hold this lock */
1502 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
1503
1504 mesh_forward(vap, m, mc);
1505
1506 if(mc->mc_ttl > 0) {
1507 if (mc->mc_flags & IEEE80211_MESH_AE_01) {
1508 /*
1509 * Forward of MSDUs from the MBSS to DS group addressed
1510 * (according to 13.11.3.2)
1511 * This happens by delivering the packet, and a bridge
1512 * will sent it on another port member.
1513 */
1514 if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE &&
1515 ms->ms_flags & IEEE80211_MESHFLAGS_FWD) {
1516 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH,
1517 MC01(mc)->mc_addr4, "%s",
1518 "forward from MBSS to the DS");
1519 }
1520 }
1521 }
1522 return (0); /* process locally */
1523 #undef MC01
1524 }
1525
1526 static int
1527 mesh_input(struct ieee80211_node *ni, struct mbuf *m,
1528 const struct ieee80211_rx_stats *rxs, int rssi, int nf)
1529 {
1530 #define HAS_SEQ(type) ((type & 0x4) == 0)
1531 #define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc)
1532 struct ieee80211vap *vap = ni->ni_vap;
1533 struct ieee80211com *ic = ni->ni_ic;
1534 struct ifnet *ifp = vap->iv_ifp;
1535 struct ieee80211_frame *wh;
1536 const struct ieee80211_meshcntl *mc;
1537 int hdrspace, meshdrlen, need_tap, error;
1538 uint8_t dir, type, subtype, ae;
1539 uint32_t seq;
1540 const uint8_t *addr;
1541 uint8_t qos[2];
1542
1543 KASSERT(ni != NULL, ("null node"));
1544 ni->ni_inact = ni->ni_inact_reload;
1545
1546 need_tap = 1; /* mbuf need to be tapped. */
1547 type = -1; /* undefined */
1548
1549 /* This is called from the RX path - don't hold this lock */
1550 IEEE80211_TX_UNLOCK_ASSERT(ic);
1551
1552 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) {
1553 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1554 ni->ni_macaddr, NULL,
1555 "too short (1): len %u", m->m_pkthdr.len);
1556 vap->iv_stats.is_rx_tooshort++;
1557 goto out;
1558 }
1559 /*
1560 * Bit of a cheat here, we use a pointer for a 3-address
1561 * frame format but don't reference fields past outside
1562 * ieee80211_frame_min w/o first validating the data is
1563 * present.
1564 */
1565 wh = mtod(m, struct ieee80211_frame *);
1566
1567 if (!IEEE80211_IS_FC0_CHECK_VER(wh, IEEE80211_FC0_VERSION_0)) {
1568 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1569 ni->ni_macaddr, NULL, "wrong version %x", wh->i_fc[0]);
1570 vap->iv_stats.is_rx_badversion++;
1571 goto err;
1572 }
1573 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK;
1574 type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK;
1575 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK;
1576 if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) {
1577 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi);
1578 ni->ni_noise = nf;
1579 if (HAS_SEQ(type)) {
1580 uint8_t tid = ieee80211_gettid(wh);
1581
1582 if (IEEE80211_QOS_HAS_SEQ(wh) &&
1583 TID_TO_WME_AC(tid) >= WME_AC_VI)
1584 ic->ic_wme.wme_hipri_traffic++;
1585 if (! ieee80211_check_rxseq(ni, wh, wh->i_addr1, rxs))
1586 goto out;
1587 }
1588 }
1589 #ifdef IEEE80211_DEBUG
1590 /*
1591 * It's easier, but too expensive, to simulate different mesh
1592 * topologies by consulting the ACL policy very early, so do this
1593 * only under DEBUG.
1594 *
1595 * NB: this check is also done upon peering link initiation.
1596 */
1597 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) {
1598 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL,
1599 wh, NULL, "%s", "disallowed by ACL");
1600 vap->iv_stats.is_rx_acl++;
1601 goto out;
1602 }
1603 #endif
1604 switch (type) {
1605 case IEEE80211_FC0_TYPE_DATA:
1606 if (ni == vap->iv_bss)
1607 goto out;
1608 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) {
1609 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
1610 ni->ni_macaddr, NULL,
1611 "peer link not yet established (%d)",
1612 ni->ni_mlstate);
1613 vap->iv_stats.is_mesh_nolink++;
1614 goto out;
1615 }
1616 if (dir != IEEE80211_FC1_DIR_FROMDS &&
1617 dir != IEEE80211_FC1_DIR_DSTODS) {
1618 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1619 wh, "data", "incorrect dir 0x%x", dir);
1620 vap->iv_stats.is_rx_wrongdir++;
1621 goto err;
1622 }
1623
1624 /* All Mesh data frames are QoS subtype */
1625 if (!HAS_SEQ(type)) {
1626 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1627 wh, "data", "incorrect subtype 0x%x", subtype);
1628 vap->iv_stats.is_rx_badsubtype++;
1629 goto err;
1630 }
1631
1632 /*
1633 * Next up, any fragmentation.
1634 * XXX: we defrag before we even try to forward,
1635 * Mesh Control field is not present in sub-sequent
1636 * fragmented frames. This is in contrast to Draft 4.0.
1637 */
1638 hdrspace = ieee80211_hdrspace(ic, wh);
1639 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1640 m = ieee80211_defrag(ni, m, hdrspace, 0);
1641 if (m == NULL) {
1642 /* Fragment dropped or frame not complete yet */
1643 goto out;
1644 }
1645 }
1646 wh = mtod(m, struct ieee80211_frame *); /* NB: after defrag */
1647
1648 /*
1649 * Now we have a complete Mesh Data frame.
1650 */
1651
1652 /*
1653 * Only fromDStoDS data frames use 4 address qos frames
1654 * as specified in amendment. Otherwise addr4 is located
1655 * in the Mesh Control field and a 3 address qos frame
1656 * is used.
1657 */
1658 *(uint16_t *)qos = *(uint16_t *)ieee80211_getqos(wh);
1659
1660 /*
1661 * NB: The mesh STA sets the Mesh Control Present
1662 * subfield to 1 in the Mesh Data frame containing
1663 * an unfragmented MSDU, an A-MSDU, or the first
1664 * fragment of an MSDU.
1665 * After defrag it should always be present.
1666 */
1667 if (!(qos[1] & IEEE80211_QOS_MC)) {
1668 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
1669 ni->ni_macaddr, NULL,
1670 "%s", "Mesh control field not present");
1671 vap->iv_stats.is_rx_elem_missing++; /* XXX: kinda */
1672 goto err;
1673 }
1674
1675 /* pull up enough to get to the mesh control */
1676 if (m->m_len < hdrspace + sizeof(struct ieee80211_meshcntl) &&
1677 (m = m_pullup(m, hdrspace +
1678 sizeof(struct ieee80211_meshcntl))) == NULL) {
1679 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1680 ni->ni_macaddr, NULL,
1681 "data too short: expecting %u", hdrspace);
1682 vap->iv_stats.is_rx_tooshort++;
1683 goto out; /* XXX */
1684 }
1685 /*
1686 * Now calculate the full extent of the headers. Note
1687 * mesh_decap will pull up anything we didn't get
1688 * above when it strips the 802.11 headers.
1689 */
1690 mc = (const struct ieee80211_meshcntl *)
1691 (mtod(m, const uint8_t *) + hdrspace);
1692 ae = mc->mc_flags & IEEE80211_MESH_AE_MASK;
1693 meshdrlen = sizeof(struct ieee80211_meshcntl) +
1694 ae * IEEE80211_ADDR_LEN;
1695 hdrspace += meshdrlen;
1696
1697 /* pull complete hdrspace = ieee80211_hdrspace + meshcontrol */
1698 if ((meshdrlen > sizeof(struct ieee80211_meshcntl)) &&
1699 (m->m_len < hdrspace) &&
1700 ((m = m_pullup(m, hdrspace)) == NULL)) {
1701 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1702 ni->ni_macaddr, NULL,
1703 "data too short: expecting %u", hdrspace);
1704 vap->iv_stats.is_rx_tooshort++;
1705 goto out; /* XXX */
1706 }
1707 /* XXX: are we sure there is no reallocating after m_pullup? */
1708
1709 seq = le32dec(mc->mc_seq);
1710 if (IEEE80211_IS_MULTICAST(wh->i_addr1))
1711 addr = wh->i_addr3;
1712 else if (ae == IEEE80211_MESH_AE_01)
1713 addr = MC01(mc)->mc_addr4;
1714 else
1715 addr = ((struct ieee80211_qosframe_addr4 *)wh)->i_addr4;
1716 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, addr)) {
1717 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
1718 addr, "data", "%s", "not to me");
1719 vap->iv_stats.is_rx_wrongbss++; /* XXX kinda */
1720 goto out;
1721 }
1722 if (mesh_checkpseq(vap, addr, seq) != 0) {
1723 vap->iv_stats.is_rx_dup++;
1724 goto out;
1725 }
1726
1727 /* This code "routes" the frame to the right control path */
1728 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1729 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr3))
1730 error =
1731 mesh_recv_indiv_data_to_me(vap, m, wh, mc);
1732 else if (IEEE80211_IS_MULTICAST(wh->i_addr3))
1733 error = mesh_recv_group_data(vap, m, wh, mc);
1734 else
1735 error = mesh_recv_indiv_data_to_fwrd(vap, m,
1736 wh, mc);
1737 } else
1738 error = mesh_recv_group_data(vap, m, wh, mc);
1739 if (error < 0)
1740 goto err;
1741 else if (error > 0)
1742 goto out;
1743
1744 if (ieee80211_radiotap_active_vap(vap))
1745 ieee80211_radiotap_rx(vap, m);
1746 need_tap = 0;
1747
1748 /*
1749 * Finally, strip the 802.11 header.
1750 */
1751 m = mesh_decap(vap, m, hdrspace, meshdrlen);
1752 if (m == NULL) {
1753 /* XXX mask bit to check for both */
1754 /* don't count Null data frames as errors */
1755 if (subtype == IEEE80211_FC0_SUBTYPE_NODATA ||
1756 subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL)
1757 goto out;
1758 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
1759 ni->ni_macaddr, "data", "%s", "decap error");
1760 vap->iv_stats.is_rx_decap++;
1761 IEEE80211_NODE_STAT(ni, rx_decap);
1762 goto err;
1763 }
1764 if (qos[0] & IEEE80211_QOS_AMSDU) {
1765 m = ieee80211_decap_amsdu(ni, m);
1766 if (m == NULL)
1767 return IEEE80211_FC0_TYPE_DATA;
1768 }
1769 ieee80211_deliver_data(vap, ni, m);
1770 return type;
1771 case IEEE80211_FC0_TYPE_MGT:
1772 vap->iv_stats.is_rx_mgmt++;
1773 IEEE80211_NODE_STAT(ni, rx_mgmt);
1774 if (dir != IEEE80211_FC1_DIR_NODS) {
1775 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1776 wh, "mgt", "incorrect dir 0x%x", dir);
1777 vap->iv_stats.is_rx_wrongdir++;
1778 goto err;
1779 }
1780 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) {
1781 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1782 ni->ni_macaddr, "mgt", "too short: len %u",
1783 m->m_pkthdr.len);
1784 vap->iv_stats.is_rx_tooshort++;
1785 goto out;
1786 }
1787 #ifdef IEEE80211_DEBUG
1788 if ((ieee80211_msg_debug(vap) &&
1789 (vap->iv_ic->ic_flags & IEEE80211_F_SCAN)) ||
1790 ieee80211_msg_dumppkts(vap)) {
1791 if_printf(ifp, "received %s from %s rssi %d\n",
1792 ieee80211_mgt_subtype_name(subtype),
1793 ether_sprintf(wh->i_addr2), rssi);
1794 }
1795 #endif
1796 if (IEEE80211_IS_PROTECTED(wh)) {
1797 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1798 wh, NULL, "%s", "WEP set but not permitted");
1799 vap->iv_stats.is_rx_mgtdiscard++; /* XXX */
1800 goto out;
1801 }
1802 vap->iv_recv_mgmt(ni, m, subtype, rxs, rssi, nf);
1803 goto out;
1804 case IEEE80211_FC0_TYPE_CTL:
1805 vap->iv_stats.is_rx_ctl++;
1806 IEEE80211_NODE_STAT(ni, rx_ctrl);
1807 goto out;
1808 default:
1809 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1810 wh, "bad", "frame type 0x%x", type);
1811 /* should not come here */
1812 break;
1813 }
1814 err:
1815 if_inc_counter(ifp, IFCOUNTER_IERRORS, 1);
1816 out:
1817 if (m != NULL) {
1818 if (need_tap && ieee80211_radiotap_active_vap(vap))
1819 ieee80211_radiotap_rx(vap, m);
1820 m_freem(m);
1821 }
1822 return type;
1823 #undef HAS_SEQ
1824 #undef MC01
1825 }
1826
1827 static void
1828 mesh_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, int subtype,
1829 const struct ieee80211_rx_stats *rxs, int rssi, int nf)
1830 {
1831 struct ieee80211vap *vap = ni->ni_vap;
1832 struct ieee80211_mesh_state *ms = vap->iv_mesh;
1833 struct ieee80211com *ic = ni->ni_ic;
1834 struct ieee80211_channel *rxchan = ic->ic_curchan;
1835 struct ieee80211_frame *wh;
1836 struct ieee80211_mesh_route *rt;
1837 uint8_t *frm, *efrm;
1838
1839 wh = mtod(m0, struct ieee80211_frame *);
1840 frm = (uint8_t *)&wh[1];
1841 efrm = mtod(m0, uint8_t *) + m0->m_len;
1842 switch (subtype) {
1843 case IEEE80211_FC0_SUBTYPE_PROBE_RESP:
1844 case IEEE80211_FC0_SUBTYPE_BEACON:
1845 {
1846 struct ieee80211_scanparams scan;
1847 struct ieee80211_channel *c;
1848 /*
1849 * We process beacon/probe response
1850 * frames to discover neighbors.
1851 */
1852 if (rxs != NULL) {
1853 c = ieee80211_lookup_channel_rxstatus(vap, rxs);
1854 if (c != NULL)
1855 rxchan = c;
1856 }
1857 if (ieee80211_parse_beacon(ni, m0, rxchan, &scan) != 0)
1858 return;
1859 /*
1860 * Count frame now that we know it's to be processed.
1861 */
1862 if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) {
1863 vap->iv_stats.is_rx_beacon++; /* XXX remove */
1864 IEEE80211_NODE_STAT(ni, rx_beacons);
1865 } else
1866 IEEE80211_NODE_STAT(ni, rx_proberesp);
1867 /*
1868 * If scanning, just pass information to the scan module.
1869 */
1870 if (ic->ic_flags & IEEE80211_F_SCAN) {
1871 if (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN) {
1872 /*
1873 * Actively scanning a channel marked passive;
1874 * send a probe request now that we know there
1875 * is 802.11 traffic present.
1876 *
1877 * XXX check if the beacon we recv'd gives
1878 * us what we need and suppress the probe req
1879 */
1880 ieee80211_probe_curchan(vap, true);
1881 ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN;
1882 }
1883 ieee80211_add_scan(vap, rxchan, &scan, wh,
1884 subtype, rssi, nf);
1885 return;
1886 }
1887
1888 /* The rest of this code assumes we are running */
1889 if (vap->iv_state != IEEE80211_S_RUN)
1890 return;
1891 /*
1892 * Ignore non-mesh STAs.
1893 */
1894 if ((scan.capinfo &
1895 (IEEE80211_CAPINFO_ESS|IEEE80211_CAPINFO_IBSS)) ||
1896 scan.meshid == NULL || scan.meshconf == NULL) {
1897 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1898 wh, "beacon", "%s", "not a mesh sta");
1899 vap->iv_stats.is_mesh_wrongmesh++;
1900 return;
1901 }
1902 /*
1903 * Ignore STAs for other mesh networks.
1904 */
1905 if (memcmp(scan.meshid+2, ms->ms_id, ms->ms_idlen) != 0 ||
1906 mesh_verify_meshconf(vap, scan.meshconf)) {
1907 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1908 wh, "beacon", "%s", "not for our mesh");
1909 vap->iv_stats.is_mesh_wrongmesh++;
1910 return;
1911 }
1912 /*
1913 * Peer only based on the current ACL policy.
1914 */
1915 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) {
1916 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL,
1917 wh, NULL, "%s", "disallowed by ACL");
1918 vap->iv_stats.is_rx_acl++;
1919 return;
1920 }
1921 /*
1922 * Do neighbor discovery.
1923 */
1924 if (!IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_macaddr)) {
1925 /*
1926 * Create a new entry in the neighbor table.
1927 */
1928 ni = ieee80211_add_neighbor(vap, wh, &scan);
1929 }
1930 /*
1931 * Automatically peer with discovered nodes if possible.
1932 */
1933 if (ni != vap->iv_bss &&
1934 (ms->ms_flags & IEEE80211_MESHFLAGS_AP)) {
1935 switch (ni->ni_mlstate) {
1936 case IEEE80211_NODE_MESH_IDLE:
1937 {
1938 uint16_t args[1];
1939
1940 /* Wait for backoff callout to reset counter */
1941 if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding)
1942 return;
1943
1944 ni->ni_mlpid = mesh_generateid(vap);
1945 if (ni->ni_mlpid == 0)
1946 return;
1947 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENSNT);
1948 args[0] = ni->ni_mlpid;
1949 ieee80211_send_action(ni,
1950 IEEE80211_ACTION_CAT_SELF_PROT,
1951 IEEE80211_ACTION_MESHPEERING_OPEN, args);
1952 ni->ni_mlrcnt = 0;
1953 mesh_peer_timeout_setup(ni);
1954 break;
1955 }
1956 case IEEE80211_NODE_MESH_ESTABLISHED:
1957 {
1958 /*
1959 * Valid beacon from a peer mesh STA
1960 * bump TA lifetime
1961 */
1962 rt = ieee80211_mesh_rt_find(vap, wh->i_addr2);
1963 if(rt != NULL) {
1964 ieee80211_mesh_rt_update(rt,
1965 ticks_to_msecs(
1966 ms->ms_ppath->mpp_inact));
1967 }
1968 break;
1969 }
1970 default:
1971 break; /* ignore */
1972 }
1973 }
1974 break;
1975 }
1976 case IEEE80211_FC0_SUBTYPE_PROBE_REQ:
1977 {
1978 uint8_t *ssid, *meshid, *rates, *xrates;
1979
1980 if (vap->iv_state != IEEE80211_S_RUN) {
1981 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1982 wh, NULL, "wrong state %s",
1983 ieee80211_state_name[vap->iv_state]);
1984 vap->iv_stats.is_rx_mgtdiscard++;
1985 return;
1986 }
1987 if (IEEE80211_IS_MULTICAST(wh->i_addr2)) {
1988 /* frame must be directed */
1989 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1990 wh, NULL, "%s", "not unicast");
1991 vap->iv_stats.is_rx_mgtdiscard++; /* XXX stat */
1992 return;
1993 }
1994 /*
1995 * prreq frame format
1996 * [tlv] ssid
1997 * [tlv] supported rates
1998 * [tlv] extended supported rates
1999 * [tlv] mesh id
2000 */
2001 ssid = meshid = rates = xrates = NULL;
2002 while (efrm - frm > 1) {
2003 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return);
2004 switch (*frm) {
2005 case IEEE80211_ELEMID_SSID:
2006 ssid = frm;
2007 break;
2008 case IEEE80211_ELEMID_RATES:
2009 rates = frm;
2010 break;
2011 case IEEE80211_ELEMID_XRATES:
2012 xrates = frm;
2013 break;
2014 case IEEE80211_ELEMID_MESHID:
2015 meshid = frm;
2016 break;
2017 }
2018 frm += frm[1] + 2;
2019 }
2020 IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return);
2021 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return);
2022 if (xrates != NULL)
2023 IEEE80211_VERIFY_ELEMENT(xrates,
2024 IEEE80211_RATE_MAXSIZE - rates[1], return);
2025 if (meshid != NULL) {
2026 IEEE80211_VERIFY_ELEMENT(meshid,
2027 IEEE80211_MESHID_LEN, return);
2028 /* NB: meshid, not ssid */
2029 IEEE80211_VERIFY_SSID(vap->iv_bss, meshid, return);
2030 }
2031
2032 /* XXX find a better class or define it's own */
2033 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_INPUT, wh->i_addr2,
2034 "%s", "recv probe req");
2035 /*
2036 * Some legacy 11b clients cannot hack a complete
2037 * probe response frame. When the request includes
2038 * only a bare-bones rate set, communicate this to
2039 * the transmit side.
2040 */
2041 ieee80211_send_proberesp(vap, wh->i_addr2, 0);
2042 break;
2043 }
2044
2045 case IEEE80211_FC0_SUBTYPE_ACTION:
2046 case IEEE80211_FC0_SUBTYPE_ACTION_NOACK:
2047 if (ni == vap->iv_bss) {
2048 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2049 wh, NULL, "%s", "unknown node");
2050 vap->iv_stats.is_rx_mgtdiscard++;
2051 } else if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) &&
2052 !IEEE80211_IS_MULTICAST(wh->i_addr1)) {
2053 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2054 wh, NULL, "%s", "not for us");
2055 vap->iv_stats.is_rx_mgtdiscard++;
2056 } else if (vap->iv_state != IEEE80211_S_RUN) {
2057 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2058 wh, NULL, "wrong state %s",
2059 ieee80211_state_name[vap->iv_state]);
2060 vap->iv_stats.is_rx_mgtdiscard++;
2061 } else {
2062 if (ieee80211_parse_action(ni, m0) == 0)
2063 (void)ic->ic_recv_action(ni, wh, frm, efrm);
2064 }
2065 break;
2066
2067 case IEEE80211_FC0_SUBTYPE_ASSOC_REQ:
2068 case IEEE80211_FC0_SUBTYPE_ASSOC_RESP:
2069 case IEEE80211_FC0_SUBTYPE_REASSOC_REQ:
2070 case IEEE80211_FC0_SUBTYPE_REASSOC_RESP:
2071 case IEEE80211_FC0_SUBTYPE_TIMING_ADV:
2072 case IEEE80211_FC0_SUBTYPE_ATIM:
2073 case IEEE80211_FC0_SUBTYPE_DISASSOC:
2074 case IEEE80211_FC0_SUBTYPE_AUTH:
2075 case IEEE80211_FC0_SUBTYPE_DEAUTH:
2076 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2077 wh, NULL, "%s", "not handled");
2078 vap->iv_stats.is_rx_mgtdiscard++;
2079 break;
2080
2081 default:
2082 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
2083 wh, "mgt", "subtype 0x%x not handled", subtype);
2084 vap->iv_stats.is_rx_badsubtype++;
2085 break;
2086 }
2087 }
2088
2089 static void
2090 mesh_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype)
2091 {
2092
2093 switch (subtype) {
2094 case IEEE80211_FC0_SUBTYPE_BAR:
2095 ieee80211_recv_bar(ni, m);
2096 break;
2097 }
2098 }
2099
2100 /*
2101 * Parse meshpeering action ie's for MPM frames
2102 */
2103 static const struct ieee80211_meshpeer_ie *
2104 mesh_parse_meshpeering_action(struct ieee80211_node *ni,
2105 const struct ieee80211_frame *wh, /* XXX for VERIFY_LENGTH */
2106 const uint8_t *frm, const uint8_t *efrm,
2107 struct ieee80211_meshpeer_ie *mp, uint8_t subtype)
2108 {
2109 struct ieee80211vap *vap = ni->ni_vap;
2110 const struct ieee80211_meshpeer_ie *mpie;
2111 uint16_t args[3];
2112 const uint8_t *meshid, *meshconf;
2113 uint8_t sendclose = 0; /* 1 = MPM frame rejected, close will be sent */
2114
2115 meshid = meshconf = NULL;
2116 while (efrm - frm > 1) {
2117 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return NULL);
2118 switch (*frm) {
2119 case IEEE80211_ELEMID_MESHID:
2120 meshid = frm;
2121 break;
2122 case IEEE80211_ELEMID_MESHCONF:
2123 meshconf = frm;
2124 break;
2125 case IEEE80211_ELEMID_MESHPEER:
2126 mpie = (const struct ieee80211_meshpeer_ie *) frm;
2127 memset(mp, 0, sizeof(*mp));
2128 mp->peer_len = mpie->peer_len;
2129 mp->peer_proto = le16dec(&mpie->peer_proto);
2130 mp->peer_llinkid = le16dec(&mpie->peer_llinkid);
2131 switch (subtype) {
2132 case IEEE80211_ACTION_MESHPEERING_CONFIRM:
2133 mp->peer_linkid =
2134 le16dec(&mpie->peer_linkid);
2135 break;
2136 case IEEE80211_ACTION_MESHPEERING_CLOSE:
2137 /* NB: peer link ID is optional */
2138 if (mpie->peer_len ==
2139 (IEEE80211_MPM_BASE_SZ + 2)) {
2140 mp->peer_linkid = 0;
2141 mp->peer_rcode =
2142 le16dec(&mpie->peer_linkid);
2143 } else {
2144 mp->peer_linkid =
2145 le16dec(&mpie->peer_linkid);
2146 mp->peer_rcode =
2147 le16dec(&mpie->peer_rcode);
2148 }
2149 break;
2150 }
2151 break;
2152 }
2153 frm += frm[1] + 2;
2154 }
2155
2156 /*
2157 * Verify the contents of the frame.
2158 * If it fails validation, close the peer link.
2159 */
2160 if (mesh_verify_meshpeer(vap, subtype, (const uint8_t *)mp)) {
2161 sendclose = 1;
2162 IEEE80211_DISCARD(vap,
2163 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2164 wh, NULL, "%s", "MPM validation failed");
2165 }
2166
2167 /* If meshid is not the same reject any frames type. */
2168 if (sendclose == 0 && mesh_verify_meshid(vap, meshid)) {
2169 sendclose = 1;
2170 IEEE80211_DISCARD(vap,
2171 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2172 wh, NULL, "%s", "not for our mesh");
2173 if (subtype == IEEE80211_ACTION_MESHPEERING_CLOSE) {
2174 /*
2175 * Standard not clear about this, if we dont ignore
2176 * there will be an endless loop between nodes sending
2177 * CLOSE frames between each other with wrong meshid.
2178 * Discard and timers will bring FSM to IDLE state.
2179 */
2180 return NULL;
2181 }
2182 }
2183
2184 /*
2185 * Close frames are accepted if meshid is the same.
2186 * Verify the other two types.
2187 */
2188 if (sendclose == 0 && subtype != IEEE80211_ACTION_MESHPEERING_CLOSE &&
2189 mesh_verify_meshconf(vap, meshconf)) {
2190 sendclose = 1;
2191 IEEE80211_DISCARD(vap,
2192 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2193 wh, NULL, "%s", "configuration mismatch");
2194 }
2195
2196 if (sendclose) {
2197 vap->iv_stats.is_rx_mgtdiscard++;
2198 switch (ni->ni_mlstate) {
2199 case IEEE80211_NODE_MESH_IDLE:
2200 case IEEE80211_NODE_MESH_ESTABLISHED:
2201 case IEEE80211_NODE_MESH_HOLDING:
2202 /* ignore */
2203 break;
2204 case IEEE80211_NODE_MESH_OPENSNT:
2205 case IEEE80211_NODE_MESH_OPENRCV:
2206 case IEEE80211_NODE_MESH_CONFIRMRCV:
2207 args[0] = ni->ni_mlpid;
2208 args[1] = ni->ni_mllid;
2209 /* Reason codes for rejection */
2210 switch (subtype) {
2211 case IEEE80211_ACTION_MESHPEERING_OPEN:
2212 args[2] = IEEE80211_REASON_MESH_CPVIOLATION;
2213 break;
2214 case IEEE80211_ACTION_MESHPEERING_CONFIRM:
2215 args[2] = IEEE80211_REASON_MESH_INCONS_PARAMS;
2216 break;
2217 }
2218 ieee80211_send_action(ni,
2219 IEEE80211_ACTION_CAT_SELF_PROT,
2220 IEEE80211_ACTION_MESHPEERING_CLOSE,
2221 args);
2222 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2223 mesh_peer_timeout_setup(ni);
2224 break;
2225 }
2226 return NULL;
2227 }
2228
2229 return (const struct ieee80211_meshpeer_ie *) mp;
2230 }
2231
2232 static int
2233 mesh_recv_action_meshpeering_open(struct ieee80211_node *ni,
2234 const struct ieee80211_frame *wh,
2235 const uint8_t *frm, const uint8_t *efrm)
2236 {
2237 struct ieee80211vap *vap = ni->ni_vap;
2238 struct ieee80211_mesh_state *ms = vap->iv_mesh;
2239 struct ieee80211_meshpeer_ie ie;
2240 const struct ieee80211_meshpeer_ie *meshpeer;
2241 uint16_t args[3];
2242
2243 /* +2+2 for action + code + capabilites */
2244 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2, efrm, &ie,
2245 IEEE80211_ACTION_MESHPEERING_OPEN);
2246 if (meshpeer == NULL) {
2247 return 0;
2248 }
2249
2250 /* XXX move up */
2251 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2252 "recv PEER OPEN, lid 0x%x", meshpeer->peer_llinkid);
2253
2254 switch (ni->ni_mlstate) {
2255 case IEEE80211_NODE_MESH_IDLE:
2256 /* Reject open request if reached our maximum neighbor count */
2257 if (ms->ms_neighbors >= IEEE80211_MESH_MAX_NEIGHBORS) {
2258 args[0] = meshpeer->peer_llinkid;
2259 args[1] = 0;
2260 args[2] = IEEE80211_REASON_MESH_MAX_PEERS;
2261 ieee80211_send_action(ni,
2262 IEEE80211_ACTION_CAT_SELF_PROT,
2263 IEEE80211_ACTION_MESHPEERING_CLOSE,
2264 args);
2265 /* stay in IDLE state */
2266 return (0);
2267 }
2268 /* Open frame accepted */
2269 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV);
2270 ni->ni_mllid = meshpeer->peer_llinkid;
2271 ni->ni_mlpid = mesh_generateid(vap);
2272 if (ni->ni_mlpid == 0)
2273 return 0; /* XXX */
2274 args[0] = ni->ni_mlpid;
2275 /* Announce we're open too... */
2276 ieee80211_send_action(ni,
2277 IEEE80211_ACTION_CAT_SELF_PROT,
2278 IEEE80211_ACTION_MESHPEERING_OPEN, args);
2279 /* ...and confirm the link. */
2280 args[0] = ni->ni_mlpid;
2281 args[1] = ni->ni_mllid;
2282 ieee80211_send_action(ni,
2283 IEEE80211_ACTION_CAT_SELF_PROT,
2284 IEEE80211_ACTION_MESHPEERING_CONFIRM,
2285 args);
2286 mesh_peer_timeout_setup(ni);
2287 break;
2288 case IEEE80211_NODE_MESH_OPENRCV:
2289 /* Wrong Link ID */
2290 if (ni->ni_mllid != meshpeer->peer_llinkid) {
2291 args[0] = ni->ni_mllid;
2292 args[1] = ni->ni_mlpid;
2293 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2294 ieee80211_send_action(ni,
2295 IEEE80211_ACTION_CAT_SELF_PROT,
2296 IEEE80211_ACTION_MESHPEERING_CLOSE,
2297 args);
2298 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2299 mesh_peer_timeout_setup(ni);
2300 break;
2301 }
2302 /* Duplicate open, confirm again. */
2303 args[0] = ni->ni_mlpid;
2304 args[1] = ni->ni_mllid;
2305 ieee80211_send_action(ni,
2306 IEEE80211_ACTION_CAT_SELF_PROT,
2307 IEEE80211_ACTION_MESHPEERING_CONFIRM,
2308 args);
2309 break;
2310 case IEEE80211_NODE_MESH_OPENSNT:
2311 ni->ni_mllid = meshpeer->peer_llinkid;
2312 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV);
2313 args[0] = ni->ni_mlpid;
2314 args[1] = ni->ni_mllid;
2315 ieee80211_send_action(ni,
2316 IEEE80211_ACTION_CAT_SELF_PROT,
2317 IEEE80211_ACTION_MESHPEERING_CONFIRM,
2318 args);
2319 /* NB: don't setup/clear any timeout */
2320 break;
2321 case IEEE80211_NODE_MESH_CONFIRMRCV:
2322 if (ni->ni_mlpid != meshpeer->peer_linkid ||
2323 ni->ni_mllid != meshpeer->peer_llinkid) {
2324 args[0] = ni->ni_mlpid;
2325 args[1] = ni->ni_mllid;
2326 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2327 ieee80211_send_action(ni,
2328 IEEE80211_ACTION_CAT_SELF_PROT,
2329 IEEE80211_ACTION_MESHPEERING_CLOSE,
2330 args);
2331 mesh_linkchange(ni,
2332 IEEE80211_NODE_MESH_HOLDING);
2333 mesh_peer_timeout_setup(ni);
2334 break;
2335 }
2336 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED);
2337 ni->ni_mllid = meshpeer->peer_llinkid;
2338 args[0] = ni->ni_mlpid;
2339 args[1] = ni->ni_mllid;
2340 ieee80211_send_action(ni,
2341 IEEE80211_ACTION_CAT_SELF_PROT,
2342 IEEE80211_ACTION_MESHPEERING_CONFIRM,
2343 args);
2344 mesh_peer_timeout_stop(ni);
2345 break;
2346 case IEEE80211_NODE_MESH_ESTABLISHED:
2347 if (ni->ni_mllid != meshpeer->peer_llinkid) {
2348 args[0] = ni->ni_mllid;
2349 args[1] = ni->ni_mlpid;
2350 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2351 ieee80211_send_action(ni,
2352 IEEE80211_ACTION_CAT_SELF_PROT,
2353 IEEE80211_ACTION_MESHPEERING_CLOSE,
2354 args);
2355 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2356 mesh_peer_timeout_setup(ni);
2357 break;
2358 }
2359 args[0] = ni->ni_mlpid;
2360 args[1] = ni->ni_mllid;
2361 ieee80211_send_action(ni,
2362 IEEE80211_ACTION_CAT_SELF_PROT,
2363 IEEE80211_ACTION_MESHPEERING_CONFIRM,
2364 args);
2365 break;
2366 case IEEE80211_NODE_MESH_HOLDING:
2367 args[0] = ni->ni_mlpid;
2368 args[1] = meshpeer->peer_llinkid;
2369 /* Standard not clear about what the reaason code should be */
2370 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2371 ieee80211_send_action(ni,
2372 IEEE80211_ACTION_CAT_SELF_PROT,
2373 IEEE80211_ACTION_MESHPEERING_CLOSE,
2374 args);
2375 break;
2376 }
2377 return 0;
2378 }
2379
2380 static int
2381 mesh_recv_action_meshpeering_confirm(struct ieee80211_node *ni,
2382 const struct ieee80211_frame *wh,
2383 const uint8_t *frm, const uint8_t *efrm)
2384 {
2385 struct ieee80211vap *vap = ni->ni_vap;
2386 struct ieee80211_meshpeer_ie ie;
2387 const struct ieee80211_meshpeer_ie *meshpeer;
2388 uint16_t args[3];
2389
2390 /* +2+2+2+2 for action + code + capabilites + status code + AID */
2391 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2+2+2, efrm, &ie,
2392 IEEE80211_ACTION_MESHPEERING_CONFIRM);
2393 if (meshpeer == NULL) {
2394 return 0;
2395 }
2396
2397 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2398 "recv PEER CONFIRM, local id 0x%x, peer id 0x%x",
2399 meshpeer->peer_llinkid, meshpeer->peer_linkid);
2400
2401 switch (ni->ni_mlstate) {
2402 case IEEE80211_NODE_MESH_OPENRCV:
2403 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED);
2404 mesh_peer_timeout_stop(ni);
2405 break;
2406 case IEEE80211_NODE_MESH_OPENSNT:
2407 mesh_linkchange(ni, IEEE80211_NODE_MESH_CONFIRMRCV);
2408 mesh_peer_timeout_setup(ni);
2409 break;
2410 case IEEE80211_NODE_MESH_HOLDING:
2411 args[0] = ni->ni_mlpid;
2412 args[1] = meshpeer->peer_llinkid;
2413 /* Standard not clear about what the reaason code should be */
2414 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2415 ieee80211_send_action(ni,
2416 IEEE80211_ACTION_CAT_SELF_PROT,
2417 IEEE80211_ACTION_MESHPEERING_CLOSE,
2418 args);
2419 break;
2420 case IEEE80211_NODE_MESH_CONFIRMRCV:
2421 if (ni->ni_mllid != meshpeer->peer_llinkid) {
2422 args[0] = ni->ni_mlpid;
2423 args[1] = ni->ni_mllid;
2424 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2425 ieee80211_send_action(ni,
2426 IEEE80211_ACTION_CAT_SELF_PROT,
2427 IEEE80211_ACTION_MESHPEERING_CLOSE,
2428 args);
2429 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2430 mesh_peer_timeout_setup(ni);
2431 }
2432 break;
2433 default:
2434 IEEE80211_DISCARD(vap,
2435 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2436 wh, NULL, "received confirm in invalid state %d",
2437 ni->ni_mlstate);
2438 vap->iv_stats.is_rx_mgtdiscard++;
2439 break;
2440 }
2441 return 0;
2442 }
2443
2444 static int
2445 mesh_recv_action_meshpeering_close(struct ieee80211_node *ni,
2446 const struct ieee80211_frame *wh,
2447 const uint8_t *frm, const uint8_t *efrm)
2448 {
2449 struct ieee80211_meshpeer_ie ie;
2450 const struct ieee80211_meshpeer_ie *meshpeer;
2451 uint16_t args[3];
2452
2453 /* +2 for action + code */
2454 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2, efrm, &ie,
2455 IEEE80211_ACTION_MESHPEERING_CLOSE);
2456 if (meshpeer == NULL) {
2457 return 0;
2458 }
2459
2460 /*
2461 * XXX: check reason code, for example we could receive
2462 * IEEE80211_REASON_MESH_MAX_PEERS then we should not attempt
2463 * to peer again.
2464 */
2465
2466 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2467 ni, "%s", "recv PEER CLOSE");
2468
2469 switch (ni->ni_mlstate) {
2470 case IEEE80211_NODE_MESH_IDLE:
2471 /* ignore */
2472 break;
2473 case IEEE80211_NODE_MESH_OPENRCV:
2474 case IEEE80211_NODE_MESH_OPENSNT:
2475 case IEEE80211_NODE_MESH_CONFIRMRCV:
2476 case IEEE80211_NODE_MESH_ESTABLISHED:
2477 args[0] = ni->ni_mlpid;
2478 args[1] = ni->ni_mllid;
2479 args[2] = IEEE80211_REASON_MESH_CLOSE_RCVD;
2480 ieee80211_send_action(ni,
2481 IEEE80211_ACTION_CAT_SELF_PROT,
2482 IEEE80211_ACTION_MESHPEERING_CLOSE,
2483 args);
2484 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2485 mesh_peer_timeout_setup(ni);
2486 break;
2487 case IEEE80211_NODE_MESH_HOLDING:
2488 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE);
2489 mesh_peer_timeout_stop(ni);
2490 break;
2491 }
2492 return 0;
2493 }
2494
2495 /*
2496 * Link Metric handling.
2497 */
2498 static int
2499 mesh_recv_action_meshlmetric(struct ieee80211_node *ni,
2500 const struct ieee80211_frame *wh,
2501 const uint8_t *frm, const uint8_t *efrm)
2502 {
2503 const struct ieee80211_meshlmetric_ie *ie =
2504 (const struct ieee80211_meshlmetric_ie *)
2505 (frm+2); /* action + code */
2506 struct ieee80211_meshlmetric_ie lm_rep;
2507
2508 if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) {
2509 lm_rep.lm_flags = 0;
2510 lm_rep.lm_metric = mesh_airtime_calc(ni);
2511 ieee80211_send_action(ni,
2512 IEEE80211_ACTION_CAT_MESH,
2513 IEEE80211_ACTION_MESH_LMETRIC,
2514 &lm_rep);
2515 }
2516 /* XXX: else do nothing for now */
2517 return 0;
2518 }
2519
2520 /*
2521 * Parse meshgate action ie's for GANN frames.
2522 * Returns -1 if parsing fails, otherwise 0.
2523 */
2524 static int
2525 mesh_parse_meshgate_action(struct ieee80211_node *ni,
2526 const struct ieee80211_frame *wh, /* XXX for VERIFY_LENGTH */
2527 struct ieee80211_meshgann_ie *ie, const uint8_t *frm, const uint8_t *efrm)
2528 {
2529 struct ieee80211vap *vap = ni->ni_vap;
2530 const struct ieee80211_meshgann_ie *gannie;
2531
2532 while (efrm - frm > 1) {
2533 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return -1);
2534 switch (*frm) {
2535 case IEEE80211_ELEMID_MESHGANN:
2536 gannie = (const struct ieee80211_meshgann_ie *) frm;
2537 memset(ie, 0, sizeof(*ie));
2538 ie->gann_ie = gannie->gann_ie;
2539 ie->gann_len = gannie->gann_len;
2540 ie->gann_flags = gannie->gann_flags;
2541 ie->gann_hopcount = gannie->gann_hopcount;
2542 ie->gann_ttl = gannie->gann_ttl;
2543 IEEE80211_ADDR_COPY(ie->gann_addr, gannie->gann_addr);
2544 ie->gann_seq = le32dec(&gannie->gann_seq);
2545 ie->gann_interval = le16dec(&gannie->gann_interval);
2546 break;
2547 }
2548 frm += frm[1] + 2;
2549 }
2550
2551 return 0;
2552 }
2553
2554 /*
2555 * Mesh Gate Announcement handling.
2556 */
2557 static int
2558 mesh_recv_action_meshgate(struct ieee80211_node *ni,
2559 const struct ieee80211_frame *wh,
2560 const uint8_t *frm, const uint8_t *efrm)
2561 {
2562 struct ieee80211vap *vap = ni->ni_vap;
2563 struct ieee80211_mesh_state *ms = vap->iv_mesh;
2564 struct ieee80211_mesh_gate_route *gr, *next;
2565 struct ieee80211_mesh_route *rt_gate;
2566 struct ieee80211_meshgann_ie pgann;
2567 struct ieee80211_meshgann_ie ie;
2568 int found = 0;
2569
2570 /* +2 for action + code */
2571 if (mesh_parse_meshgate_action(ni, wh, &ie, frm+2, efrm) != 0) {
2572 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
2573 ni->ni_macaddr, NULL, "%s",
2574 "GANN parsing failed");
2575 vap->iv_stats.is_rx_mgtdiscard++;
2576 return (0);
2577 }
2578
2579 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ie.gann_addr))
2580 return 0;
2581
2582 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ni->ni_macaddr,
2583 "received GANN, meshgate: %6D (seq %u)", ie.gann_addr, ":",
2584 ie.gann_seq);
2585
2586 if (ms == NULL)
2587 return (0);
2588 MESH_RT_LOCK(ms);
2589 TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) {
2590 if (!IEEE80211_ADDR_EQ(gr->gr_addr, ie.gann_addr))
2591 continue;
2592 if (ie.gann_seq <= gr->gr_lastseq) {
2593 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
2594 ni->ni_macaddr, NULL,
2595 "GANN old seqno %u <= %u",
2596 ie.gann_seq, gr->gr_lastseq);
2597 MESH_RT_UNLOCK(ms);
2598 return (0);
2599 }
2600 /* corresponding mesh gate found & GANN accepted */
2601 found = 1;
2602 break;
2603 }
2604 if (found == 0) {
2605 /* this GANN is from a new mesh Gate add it to known table. */
2606 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie.gann_addr,
2607 "stored new GANN information, seq %u.", ie.gann_seq);
2608 gr = IEEE80211_MALLOC(ALIGN(sizeof(struct ieee80211_mesh_gate_route)),
2609 M_80211_MESH_GT_RT,
2610 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
2611 IEEE80211_ADDR_COPY(gr->gr_addr, ie.gann_addr);
2612 TAILQ_INSERT_TAIL(&ms->ms_known_gates, gr, gr_next);
2613 }
2614 gr->gr_lastseq = ie.gann_seq;
2615
2616 /* check if we have a path to this gate */
2617 rt_gate = mesh_rt_find_locked(ms, gr->gr_addr);
2618 if (rt_gate != NULL &&
2619 rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) {
2620 gr->gr_route = rt_gate;
2621 rt_gate->rt_flags |= IEEE80211_MESHRT_FLAGS_GATE;
2622 }
2623
2624 MESH_RT_UNLOCK(ms);
2625
2626 /* popagate only if decremented ttl >= 1 && forwarding is enabled */
2627 if ((ie.gann_ttl - 1) < 1 && !(ms->ms_flags & IEEE80211_MESHFLAGS_FWD))
2628 return 0;
2629 pgann.gann_flags = ie.gann_flags; /* Reserved */
2630 pgann.gann_hopcount = ie.gann_hopcount + 1;
2631 pgann.gann_ttl = ie.gann_ttl - 1;
2632 IEEE80211_ADDR_COPY(pgann.gann_addr, ie.gann_addr);
2633 pgann.gann_seq = ie.gann_seq;
2634 pgann.gann_interval = ie.gann_interval;
2635
2636 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie.gann_addr,
2637 "%s", "propagate GANN");
2638
2639 ieee80211_send_action(vap->iv_bss, IEEE80211_ACTION_CAT_MESH,
2640 IEEE80211_ACTION_MESH_GANN, &pgann);
2641
2642 return 0;
2643 }
2644
2645 static int
2646 mesh_send_action(struct ieee80211_node *ni,
2647 const uint8_t sa[IEEE80211_ADDR_LEN],
2648 const uint8_t da[IEEE80211_ADDR_LEN],
2649 struct mbuf *m)
2650 {
2651 struct ieee80211vap *vap = ni->ni_vap;
2652 struct ieee80211com *ic = ni->ni_ic;
2653 struct ieee80211_bpf_params params;
2654 int ret;
2655
2656 KASSERT(ni != NULL, ("null node"));
2657
2658 if (vap->iv_state == IEEE80211_S_CAC) {
2659 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT, ni,
2660 "block %s frame in CAC state", "Mesh action");
2661 vap->iv_stats.is_tx_badstate++;
2662 ieee80211_free_node(ni);
2663 m_freem(m);
2664 return EIO; /* XXX */
2665 }
2666
2667 M_PREPEND(m, sizeof(struct ieee80211_frame), IEEE80211_M_NOWAIT);
2668 if (m == NULL) {
2669 ieee80211_free_node(ni);
2670 return ENOMEM;
2671 }
2672
2673 IEEE80211_TX_LOCK(ic);
2674 ieee80211_send_setup(ni, m,
2675 IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_ACTION,
2676 IEEE80211_NONQOS_TID, sa, da, sa);
2677 m->m_flags |= M_ENCAP; /* mark encapsulated */
2678
2679 memset(&params, 0, sizeof(params));
2680 params.ibp_pri = WME_AC_VO;
2681 params.ibp_rate0 = ni->ni_txparms->mgmtrate;
2682 if (IEEE80211_IS_MULTICAST(da))
2683 params.ibp_try0 = 1;
2684 else
2685 params.ibp_try0 = ni->ni_txparms->maxretry;
2686 params.ibp_power = ni->ni_txpower;
2687
2688 IEEE80211_NODE_STAT(ni, tx_mgmt);
2689
2690 ret = ieee80211_raw_output(vap, ni, m, &params);
2691 IEEE80211_TX_UNLOCK(ic);
2692 return (ret);
2693 }
2694
2695 #define ADDSHORT(frm, v) do { \
2696 frm[0] = (v) & 0xff; \
2697 frm[1] = (v) >> 8; \
2698 frm += 2; \
2699 } while (0)
2700 #define ADDWORD(frm, v) do { \
2701 frm[0] = (v) & 0xff; \
2702 frm[1] = ((v) >> 8) & 0xff; \
2703 frm[2] = ((v) >> 16) & 0xff; \
2704 frm[3] = ((v) >> 24) & 0xff; \
2705 frm += 4; \
2706 } while (0)
2707
2708 static int
2709 mesh_send_action_meshpeering_open(struct ieee80211_node *ni,
2710 int category, int action, void *args0)
2711 {
2712 struct ieee80211vap *vap = ni->ni_vap;
2713 struct ieee80211com *ic = ni->ni_ic;
2714 uint16_t *args = args0;
2715 const struct ieee80211_rateset *rs;
2716 struct mbuf *m;
2717 uint8_t *frm;
2718
2719 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2720 "send PEER OPEN action: localid 0x%x", args[0]);
2721
2722 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2723 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2724 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2725 ieee80211_ref_node(ni);
2726
2727 m = ieee80211_getmgtframe(&frm,
2728 ic->ic_headroom + sizeof(struct ieee80211_frame),
2729 sizeof(uint16_t) /* action+category */
2730 + sizeof(uint16_t) /* capabilites */
2731 + 2 + IEEE80211_RATE_SIZE
2732 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
2733 + 2 + IEEE80211_MESHID_LEN
2734 + sizeof(struct ieee80211_meshconf_ie)
2735 + sizeof(struct ieee80211_meshpeer_ie)
2736 );
2737 if (m != NULL) {
2738 /*
2739 * mesh peer open action frame format:
2740 * [1] category
2741 * [1] action
2742 * [2] capabilities
2743 * [tlv] rates
2744 * [tlv] xrates
2745 * [tlv] mesh id
2746 * [tlv] mesh conf
2747 * [tlv] mesh peer link mgmt
2748 */
2749 *frm++ = category;
2750 *frm++ = action;
2751 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan));
2752 rs = ieee80211_get_suprates(ic, ic->ic_curchan);
2753 frm = ieee80211_add_rates(frm, rs);
2754 frm = ieee80211_add_xrates(frm, rs);
2755 frm = ieee80211_add_meshid(frm, vap);
2756 frm = ieee80211_add_meshconf(frm, vap);
2757 frm = ieee80211_add_meshpeer(frm, IEEE80211_ACTION_MESHPEERING_OPEN,
2758 args[0], 0, 0);
2759 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2760 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m);
2761 } else {
2762 vap->iv_stats.is_tx_nobuf++;
2763 ieee80211_free_node(ni);
2764 return ENOMEM;
2765 }
2766 }
2767
2768 static int
2769 mesh_send_action_meshpeering_confirm(struct ieee80211_node *ni,
2770 int category, int action, void *args0)
2771 {
2772 struct ieee80211vap *vap = ni->ni_vap;
2773 struct ieee80211com *ic = ni->ni_ic;
2774 uint16_t *args = args0;
2775 const struct ieee80211_rateset *rs;
2776 struct mbuf *m;
2777 uint8_t *frm;
2778
2779 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2780 "send PEER CONFIRM action: localid 0x%x, peerid 0x%x",
2781 args[0], args[1]);
2782
2783 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2784 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2785 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2786 ieee80211_ref_node(ni);
2787
2788 m = ieee80211_getmgtframe(&frm,
2789 ic->ic_headroom + sizeof(struct ieee80211_frame),
2790 sizeof(uint16_t) /* action+category */
2791 + sizeof(uint16_t) /* capabilites */
2792 + sizeof(uint16_t) /* status code */
2793 + sizeof(uint16_t) /* AID */
2794 + 2 + IEEE80211_RATE_SIZE
2795 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
2796 + 2 + IEEE80211_MESHID_LEN
2797 + sizeof(struct ieee80211_meshconf_ie)
2798 + sizeof(struct ieee80211_meshpeer_ie)
2799 );
2800 if (m != NULL) {
2801 /*
2802 * mesh peer confirm action frame format:
2803 * [1] category
2804 * [1] action
2805 * [2] capabilities
2806 * [2] status code
2807 * [2] association id (peer ID)
2808 * [tlv] rates
2809 * [tlv] xrates
2810 * [tlv] mesh id
2811 * [tlv] mesh conf
2812 * [tlv] mesh peer link mgmt
2813 */
2814 *frm++ = category;
2815 *frm++ = action;
2816 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan));
2817 ADDSHORT(frm, 0); /* status code */
2818 ADDSHORT(frm, args[1]); /* AID */
2819 rs = ieee80211_get_suprates(ic, ic->ic_curchan);
2820 frm = ieee80211_add_rates(frm, rs);
2821 frm = ieee80211_add_xrates(frm, rs);
2822 frm = ieee80211_add_meshid(frm, vap);
2823 frm = ieee80211_add_meshconf(frm, vap);
2824 frm = ieee80211_add_meshpeer(frm,
2825 IEEE80211_ACTION_MESHPEERING_CONFIRM,
2826 args[0], args[1], 0);
2827 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2828 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m);
2829 } else {
2830 vap->iv_stats.is_tx_nobuf++;
2831 ieee80211_free_node(ni);
2832 return ENOMEM;
2833 }
2834 }
2835
2836 static int
2837 mesh_send_action_meshpeering_close(struct ieee80211_node *ni,
2838 int category, int action, void *args0)
2839 {
2840 struct ieee80211vap *vap = ni->ni_vap;
2841 struct ieee80211com *ic = ni->ni_ic;
2842 uint16_t *args = args0;
2843 struct mbuf *m;
2844 uint8_t *frm;
2845
2846 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2847 "send PEER CLOSE action: localid 0x%x, peerid 0x%x reason %d (%s)",
2848 args[0], args[1], args[2], ieee80211_reason_to_string(args[2]));
2849
2850 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2851 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2852 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2853 ieee80211_ref_node(ni);
2854
2855 m = ieee80211_getmgtframe(&frm,
2856 ic->ic_headroom + sizeof(struct ieee80211_frame),
2857 sizeof(uint16_t) /* action+category */
2858 + sizeof(uint16_t) /* reason code */
2859 + 2 + IEEE80211_MESHID_LEN
2860 + sizeof(struct ieee80211_meshpeer_ie)
2861 );
2862 if (m != NULL) {
2863 /*
2864 * mesh peer close action frame format:
2865 * [1] category
2866 * [1] action
2867 * [tlv] mesh id
2868 * [tlv] mesh peer link mgmt
2869 */
2870 *frm++ = category;
2871 *frm++ = action;
2872 frm = ieee80211_add_meshid(frm, vap);
2873 frm = ieee80211_add_meshpeer(frm,
2874 IEEE80211_ACTION_MESHPEERING_CLOSE,
2875 args[0], args[1], args[2]);
2876 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2877 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m);
2878 } else {
2879 vap->iv_stats.is_tx_nobuf++;
2880 ieee80211_free_node(ni);
2881 return ENOMEM;
2882 }
2883 }
2884
2885 static int
2886 mesh_send_action_meshlmetric(struct ieee80211_node *ni,
2887 int category, int action, void *arg0)
2888 {
2889 struct ieee80211vap *vap = ni->ni_vap;
2890 struct ieee80211com *ic = ni->ni_ic;
2891 struct ieee80211_meshlmetric_ie *ie = arg0;
2892 struct mbuf *m;
2893 uint8_t *frm;
2894
2895 if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) {
2896 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2897 ni, "%s", "send LINK METRIC REQUEST action");
2898 } else {
2899 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2900 ni, "send LINK METRIC REPLY action: metric 0x%x",
2901 ie->lm_metric);
2902 }
2903 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2904 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2905 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2906 ieee80211_ref_node(ni);
2907
2908 m = ieee80211_getmgtframe(&frm,
2909 ic->ic_headroom + sizeof(struct ieee80211_frame),
2910 sizeof(uint16_t) + /* action+category */
2911 sizeof(struct ieee80211_meshlmetric_ie)
2912 );
2913 if (m != NULL) {
2914 /*
2915 * mesh link metric
2916 * [1] category
2917 * [1] action
2918 * [tlv] mesh link metric
2919 */
2920 *frm++ = category;
2921 *frm++ = action;
2922 frm = ieee80211_add_meshlmetric(frm,
2923 ie->lm_flags, ie->lm_metric);
2924 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2925 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m);
2926 } else {
2927 vap->iv_stats.is_tx_nobuf++;
2928 ieee80211_free_node(ni);
2929 return ENOMEM;
2930 }
2931 }
2932
2933 static int
2934 mesh_send_action_meshgate(struct ieee80211_node *ni,
2935 int category, int action, void *arg0)
2936 {
2937 struct ieee80211vap *vap = ni->ni_vap;
2938 struct ieee80211com *ic = ni->ni_ic;
2939 struct ieee80211_meshgann_ie *ie = arg0;
2940 struct mbuf *m;
2941 uint8_t *frm;
2942
2943 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2944 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2945 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2946 ieee80211_ref_node(ni);
2947
2948 m = ieee80211_getmgtframe(&frm,
2949 ic->ic_headroom + sizeof(struct ieee80211_frame),
2950 sizeof(uint16_t) + /* action+category */
2951 IEEE80211_MESHGANN_BASE_SZ
2952 );
2953 if (m != NULL) {
2954 /*
2955 * mesh link metric
2956 * [1] category
2957 * [1] action
2958 * [tlv] mesh gate announcement
2959 */
2960 *frm++ = category;
2961 *frm++ = action;
2962 frm = ieee80211_add_meshgate(frm, ie);
2963 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2964 return mesh_send_action(ni, vap->iv_myaddr, broadcastaddr, m);
2965 } else {
2966 vap->iv_stats.is_tx_nobuf++;
2967 ieee80211_free_node(ni);
2968 return ENOMEM;
2969 }
2970 }
2971
2972 static void
2973 mesh_peer_timeout_setup(struct ieee80211_node *ni)
2974 {
2975 switch (ni->ni_mlstate) {
2976 case IEEE80211_NODE_MESH_HOLDING:
2977 ni->ni_mltval = ieee80211_mesh_holdingtimeout;
2978 break;
2979 case IEEE80211_NODE_MESH_CONFIRMRCV:
2980 ni->ni_mltval = ieee80211_mesh_confirmtimeout;
2981 break;
2982 case IEEE80211_NODE_MESH_IDLE:
2983 ni->ni_mltval = 0;
2984 break;
2985 default:
2986 ni->ni_mltval = ieee80211_mesh_retrytimeout;
2987 break;
2988 }
2989 if (ni->ni_mltval)
2990 callout_reset(&ni->ni_mltimer, ni->ni_mltval,
2991 mesh_peer_timeout_cb, ni);
2992 }
2993
2994 /*
2995 * Same as above but backoffs timer statisically 50%.
2996 */
2997 static void
2998 mesh_peer_timeout_backoff(struct ieee80211_node *ni)
2999 {
3000 uint32_t r;
3001
3002 r = arc4random();
3003 ni->ni_mltval += r % ni->ni_mltval;
3004 callout_reset(&ni->ni_mltimer, ni->ni_mltval, mesh_peer_timeout_cb,
3005 ni);
3006 }
3007
3008 static __inline void
3009 mesh_peer_timeout_stop(struct ieee80211_node *ni)
3010 {
3011 callout_drain(&ni->ni_mltimer);
3012 }
3013
3014 static void
3015 mesh_peer_backoff_cb(void *arg)
3016 {
3017 struct ieee80211_node *ni = (struct ieee80211_node *)arg;
3018
3019 /* After backoff timeout, try to peer automatically again. */
3020 ni->ni_mlhcnt = 0;
3021 }
3022
3023 /*
3024 * Mesh Peer Link Management FSM timeout handling.
3025 */
3026 static void
3027 mesh_peer_timeout_cb(void *arg)
3028 {
3029 struct ieee80211_node *ni = (struct ieee80211_node *)arg;
3030 uint16_t args[3];
3031
3032 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_MESH,
3033 ni, "mesh link timeout, state %d, retry counter %d",
3034 ni->ni_mlstate, ni->ni_mlrcnt);
3035
3036 switch (ni->ni_mlstate) {
3037 case IEEE80211_NODE_MESH_IDLE:
3038 case IEEE80211_NODE_MESH_ESTABLISHED:
3039 break;
3040 case IEEE80211_NODE_MESH_OPENSNT:
3041 case IEEE80211_NODE_MESH_OPENRCV:
3042 if (ni->ni_mlrcnt == ieee80211_mesh_maxretries) {
3043 args[0] = ni->ni_mlpid;
3044 args[2] = IEEE80211_REASON_MESH_MAX_RETRIES;
3045 ieee80211_send_action(ni,
3046 IEEE80211_ACTION_CAT_SELF_PROT,
3047 IEEE80211_ACTION_MESHPEERING_CLOSE, args);
3048 ni->ni_mlrcnt = 0;
3049 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
3050 mesh_peer_timeout_setup(ni);
3051 } else {
3052 args[0] = ni->ni_mlpid;
3053 ieee80211_send_action(ni,
3054 IEEE80211_ACTION_CAT_SELF_PROT,
3055 IEEE80211_ACTION_MESHPEERING_OPEN, args);
3056 ni->ni_mlrcnt++;
3057 mesh_peer_timeout_backoff(ni);
3058 }
3059 break;
3060 case IEEE80211_NODE_MESH_CONFIRMRCV:
3061 args[0] = ni->ni_mlpid;
3062 args[2] = IEEE80211_REASON_MESH_CONFIRM_TIMEOUT;
3063 ieee80211_send_action(ni,
3064 IEEE80211_ACTION_CAT_SELF_PROT,
3065 IEEE80211_ACTION_MESHPEERING_CLOSE, args);
3066 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
3067 mesh_peer_timeout_setup(ni);
3068 break;
3069 case IEEE80211_NODE_MESH_HOLDING:
3070 ni->ni_mlhcnt++;
3071 if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding)
3072 callout_reset(&ni->ni_mlhtimer,
3073 ieee80211_mesh_backofftimeout,
3074 mesh_peer_backoff_cb, ni);
3075 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE);
3076 break;
3077 }
3078 }
3079
3080 static int
3081 mesh_verify_meshid(struct ieee80211vap *vap, const uint8_t *ie)
3082 {
3083 struct ieee80211_mesh_state *ms = vap->iv_mesh;
3084
3085 if (ie == NULL || ie[1] != ms->ms_idlen)
3086 return 1;
3087 return memcmp(ms->ms_id, ie + 2, ms->ms_idlen);
3088 }
3089
3090 /*
3091 * Check if we are using the same algorithms for this mesh.
3092 */
3093 static int
3094 mesh_verify_meshconf(struct ieee80211vap *vap, const uint8_t *ie)
3095 {
3096 const struct ieee80211_meshconf_ie *meshconf =
3097 (const struct ieee80211_meshconf_ie *) ie;
3098 const struct ieee80211_mesh_state *ms = vap->iv_mesh;
3099
3100 if (meshconf == NULL)
3101 return 1;
3102 if (meshconf->conf_pselid != ms->ms_ppath->mpp_ie) {
3103 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3104 "unknown path selection algorithm: 0x%x\n",
3105 meshconf->conf_pselid);
3106 return 1;
3107 }
3108 if (meshconf->conf_pmetid != ms->ms_pmetric->mpm_ie) {
3109 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3110 "unknown path metric algorithm: 0x%x\n",
3111 meshconf->conf_pmetid);
3112 return 1;
3113 }
3114 if (meshconf->conf_ccid != 0) {
3115 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3116 "unknown congestion control algorithm: 0x%x\n",
3117 meshconf->conf_ccid);
3118 return 1;
3119 }
3120 if (meshconf->conf_syncid != IEEE80211_MESHCONF_SYNC_NEIGHOFF) {
3121 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3122 "unknown sync algorithm: 0x%x\n",
3123 meshconf->conf_syncid);
3124 return 1;
3125 }
3126 if (meshconf->conf_authid != 0) {
3127 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3128 "unknown auth auth algorithm: 0x%x\n",
3129 meshconf->conf_pselid);
3130 return 1;
3131 }
3132 /* Not accepting peers */
3133 if (!(meshconf->conf_cap & IEEE80211_MESHCONF_CAP_AP)) {
3134 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3135 "not accepting peers: 0x%x\n", meshconf->conf_cap);
3136 return 1;
3137 }
3138 return 0;
3139 }
3140
3141 static int
3142 mesh_verify_meshpeer(struct ieee80211vap *vap, uint8_t subtype,
3143 const uint8_t *ie)
3144 {
3145 const struct ieee80211_meshpeer_ie *meshpeer =
3146 (const struct ieee80211_meshpeer_ie *) ie;
3147
3148 if (meshpeer == NULL ||
3149 meshpeer->peer_len < IEEE80211_MPM_BASE_SZ ||
3150 meshpeer->peer_len > IEEE80211_MPM_MAX_SZ)
3151 return 1;
3152 if (meshpeer->peer_proto != IEEE80211_MPPID_MPM) {
3153 IEEE80211_DPRINTF(vap,
3154 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
3155 "Only MPM protocol is supported (proto: 0x%02X)",
3156 meshpeer->peer_proto);
3157 return 1;
3158 }
3159 switch (subtype) {
3160 case IEEE80211_ACTION_MESHPEERING_OPEN:
3161 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ)
3162 return 1;
3163 break;
3164 case IEEE80211_ACTION_MESHPEERING_CONFIRM:
3165 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ + 2)
3166 return 1;
3167 break;
3168 case IEEE80211_ACTION_MESHPEERING_CLOSE:
3169 if (meshpeer->peer_len < IEEE80211_MPM_BASE_SZ + 2)
3170 return 1;
3171 if (meshpeer->peer_len == (IEEE80211_MPM_BASE_SZ + 2) &&
3172 meshpeer->peer_linkid != 0)
3173 return 1;
3174 if (meshpeer->peer_rcode == 0)
3175 return 1;
3176 break;
3177 }
3178 return 0;
3179 }
3180
3181 /*
3182 * Add a Mesh ID IE to a frame.
3183 */
3184 uint8_t *
3185 ieee80211_add_meshid(uint8_t *frm, struct ieee80211vap *vap)
3186 {
3187 struct ieee80211_mesh_state *ms = vap->iv_mesh;
3188
3189 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a mbss vap"));
3190
3191 *frm++ = IEEE80211_ELEMID_MESHID;
3192 *frm++ = ms->ms_idlen;
3193 memcpy(frm, ms->ms_id, ms->ms_idlen);
3194 return frm + ms->ms_idlen;
3195 }
3196
3197 /*
3198 * Add a Mesh Configuration IE to a frame.
3199 * For now just use HWMP routing, Airtime link metric, Null Congestion
3200 * Signaling, Null Sync Protocol and Null Authentication.
3201 */
3202 uint8_t *
3203 ieee80211_add_meshconf(uint8_t *frm, struct ieee80211vap *vap)
3204 {
3205 const struct ieee80211_mesh_state *ms = vap->iv_mesh;
3206 uint16_t caps;
3207
3208 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap"));
3209
3210 *frm++ = IEEE80211_ELEMID_MESHCONF;
3211 *frm++ = IEEE80211_MESH_CONF_SZ;
3212 *frm++ = ms->ms_ppath->mpp_ie; /* path selection */
3213 *frm++ = ms->ms_pmetric->mpm_ie; /* link metric */
3214 *frm++ = IEEE80211_MESHCONF_CC_DISABLED;
3215 *frm++ = IEEE80211_MESHCONF_SYNC_NEIGHOFF;
3216 *frm++ = IEEE80211_MESHCONF_AUTH_DISABLED;
3217 /* NB: set the number of neighbors before the rest */
3218 *frm = (ms->ms_neighbors > IEEE80211_MESH_MAX_NEIGHBORS ?
3219 IEEE80211_MESH_MAX_NEIGHBORS : ms->ms_neighbors) << 1;
3220 if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE)
3221 *frm |= IEEE80211_MESHCONF_FORM_GATE;
3222 frm += 1;
3223 caps = 0;
3224 if (ms->ms_flags & IEEE80211_MESHFLAGS_AP)
3225 caps |= IEEE80211_MESHCONF_CAP_AP;
3226 if (ms->ms_flags & IEEE80211_MESHFLAGS_FWD)
3227 caps |= IEEE80211_MESHCONF_CAP_FWRD;
3228 *frm++ = caps;
3229 return frm;
3230 }
3231
3232 /*
3233 * Add a Mesh Peer Management IE to a frame.
3234 */
3235 uint8_t *
3236 ieee80211_add_meshpeer(uint8_t *frm, uint8_t subtype, uint16_t localid,
3237 uint16_t peerid, uint16_t reason)
3238 {
3239
3240 KASSERT(localid != 0, ("localid == 0"));
3241
3242 *frm++ = IEEE80211_ELEMID_MESHPEER;
3243 switch (subtype) {
3244 case IEEE80211_ACTION_MESHPEERING_OPEN:
3245 *frm++ = IEEE80211_MPM_BASE_SZ; /* length */
3246 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */
3247 ADDSHORT(frm, localid); /* local ID */
3248 break;
3249 case IEEE80211_ACTION_MESHPEERING_CONFIRM:
3250 KASSERT(peerid != 0, ("sending peer confirm without peer id"));
3251 *frm++ = IEEE80211_MPM_BASE_SZ + 2; /* length */
3252 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */
3253 ADDSHORT(frm, localid); /* local ID */
3254 ADDSHORT(frm, peerid); /* peer ID */
3255 break;
3256 case IEEE80211_ACTION_MESHPEERING_CLOSE:
3257 if (peerid)
3258 *frm++ = IEEE80211_MPM_MAX_SZ; /* length */
3259 else
3260 *frm++ = IEEE80211_MPM_BASE_SZ + 2; /* length */
3261 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */
3262 ADDSHORT(frm, localid); /* local ID */
3263 if (peerid)
3264 ADDSHORT(frm, peerid); /* peer ID */
3265 ADDSHORT(frm, reason);
3266 break;
3267 }
3268 return frm;
3269 }
3270
3271 /*
3272 * Compute an Airtime Link Metric for the link with this node.
3273 *
3274 * Based on Draft 3.0 spec (11B.10, p.149).
3275 */
3276 /*
3277 * Max 802.11s overhead.
3278 */
3279 #define IEEE80211_MESH_MAXOVERHEAD \
3280 (sizeof(struct ieee80211_qosframe_addr4) \
3281 + sizeof(struct ieee80211_meshcntl_ae10) \
3282 + sizeof(struct llc) \
3283 + IEEE80211_ADDR_LEN \
3284 + IEEE80211_WEP_IVLEN \
3285 + IEEE80211_WEP_KIDLEN \
3286 + IEEE80211_WEP_CRCLEN \
3287 + IEEE80211_WEP_MICLEN \
3288 + IEEE80211_CRC_LEN)
3289 uint32_t
3290 mesh_airtime_calc(struct ieee80211_node *ni)
3291 {
3292 #define M_BITS 8
3293 #define S_FACTOR (2 * M_BITS)
3294 struct ieee80211com *ic = ni->ni_ic;
3295 struct ifnet *ifp = ni->ni_vap->iv_ifp;
3296 const static int nbits = 8192 << M_BITS;
3297 uint32_t overhead, rate, errrate;
3298 uint64_t res;
3299
3300 /* Time to transmit a frame */
3301 rate = ni->ni_txrate;
3302 overhead = ieee80211_compute_duration(ic->ic_rt,
3303 ifp->if_mtu + IEEE80211_MESH_MAXOVERHEAD, rate, 0) << M_BITS;
3304 /* Error rate in percentage */
3305 /* XXX assuming small failures are ok */
3306 errrate = (((ifp->if_get_counter(ifp, IFCOUNTER_OERRORS) +
3307 ifp->if_get_counter(ifp, IFCOUNTER_IERRORS)) / 100) << M_BITS)
3308 / 100;
3309 res = (overhead + (nbits / rate)) *
3310 ((1 << S_FACTOR) / ((1 << M_BITS) - errrate));
3311
3312 return (uint32_t)(res >> S_FACTOR);
3313 #undef M_BITS
3314 #undef S_FACTOR
3315 }
3316
3317 /*
3318 * Add a Mesh Link Metric report IE to a frame.
3319 */
3320 uint8_t *
3321 ieee80211_add_meshlmetric(uint8_t *frm, uint8_t flags, uint32_t metric)
3322 {
3323 *frm++ = IEEE80211_ELEMID_MESHLINK;
3324 *frm++ = 5;
3325 *frm++ = flags;
3326 ADDWORD(frm, metric);
3327 return frm;
3328 }
3329
3330 /*
3331 * Add a Mesh Gate Announcement IE to a frame.
3332 */
3333 uint8_t *
3334 ieee80211_add_meshgate(uint8_t *frm, struct ieee80211_meshgann_ie *ie)
3335 {
3336 *frm++ = IEEE80211_ELEMID_MESHGANN; /* ie */
3337 *frm++ = IEEE80211_MESHGANN_BASE_SZ; /* len */
3338 *frm++ = ie->gann_flags;
3339 *frm++ = ie->gann_hopcount;
3340 *frm++ = ie->gann_ttl;
3341 IEEE80211_ADDR_COPY(frm, ie->gann_addr);
3342 frm += 6;
3343 ADDWORD(frm, ie->gann_seq);
3344 ADDSHORT(frm, ie->gann_interval);
3345 return frm;
3346 }
3347 #undef ADDSHORT
3348 #undef ADDWORD
3349
3350 /*
3351 * Initialize any mesh-specific node state.
3352 */
3353 void
3354 ieee80211_mesh_node_init(struct ieee80211vap *vap, struct ieee80211_node *ni)
3355 {
3356 ni->ni_flags |= IEEE80211_NODE_QOS;
3357 callout_init(&ni->ni_mltimer, 1);
3358 callout_init(&ni->ni_mlhtimer, 1);
3359 }
3360
3361 /*
3362 * Cleanup any mesh-specific node state.
3363 */
3364 void
3365 ieee80211_mesh_node_cleanup(struct ieee80211_node *ni)
3366 {
3367 struct ieee80211vap *vap = ni->ni_vap;
3368 struct ieee80211_mesh_state *ms = vap->iv_mesh;
3369
3370 callout_drain(&ni->ni_mltimer);
3371 callout_drain(&ni->ni_mlhtimer);
3372 /* NB: short-circuit callbacks after mesh_vdetach */
3373 if (vap->iv_mesh != NULL)
3374 ms->ms_ppath->mpp_peerdown(ni);
3375 }
3376
3377 void
3378 ieee80211_parse_meshid(struct ieee80211_node *ni, const uint8_t *ie)
3379 {
3380 ni->ni_meshidlen = ie[1];
3381 memcpy(ni->ni_meshid, ie + 2, ie[1]);
3382 }
3383
3384 /*
3385 * Setup mesh-specific node state on neighbor discovery.
3386 */
3387 void
3388 ieee80211_mesh_init_neighbor(struct ieee80211_node *ni,
3389 const struct ieee80211_frame *wh,
3390 const struct ieee80211_scanparams *sp)
3391 {
3392 ieee80211_parse_meshid(ni, sp->meshid);
3393 }
3394
3395 void
3396 ieee80211_mesh_update_beacon(struct ieee80211vap *vap,
3397 struct ieee80211_beacon_offsets *bo)
3398 {
3399 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap"));
3400
3401 if (isset(bo->bo_flags, IEEE80211_BEACON_MESHCONF)) {
3402 (void)ieee80211_add_meshconf(bo->bo_meshconf, vap);
3403 clrbit(bo->bo_flags, IEEE80211_BEACON_MESHCONF);
3404 }
3405 }
3406
3407 static int
3408 mesh_ioctl_get80211(struct ieee80211vap *vap, struct ieee80211req *ireq)
3409 {
3410 struct ieee80211_mesh_state *ms = vap->iv_mesh;
3411 uint8_t tmpmeshid[IEEE80211_NWID_LEN];
3412 struct ieee80211_mesh_route *rt;
3413 struct ieee80211req_mesh_route *imr;
3414 size_t len, off;
3415 uint8_t *p;
3416 int error;
3417
3418 if (vap->iv_opmode != IEEE80211_M_MBSS)
3419 return ENOSYS;
3420
3421 error = 0;
3422 switch (ireq->i_type) {
3423 case IEEE80211_IOC_MESH_ID:
3424 ireq->i_len = ms->ms_idlen;
3425 memcpy(tmpmeshid, ms->ms_id, ireq->i_len);
3426 error = copyout(tmpmeshid, ireq->i_data, ireq->i_len);
3427 break;
3428 case IEEE80211_IOC_MESH_AP:
3429 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_AP) != 0;
3430 break;
3431 case IEEE80211_IOC_MESH_FWRD:
3432 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) != 0;
3433 break;
3434 case IEEE80211_IOC_MESH_GATE:
3435 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) != 0;
3436 break;
3437 case IEEE80211_IOC_MESH_TTL:
3438 ireq->i_val = ms->ms_ttl;
3439 break;
3440 case IEEE80211_IOC_MESH_RTCMD:
3441 switch (ireq->i_val) {
3442 case IEEE80211_MESH_RTCMD_LIST:
3443 len = 0;
3444 MESH_RT_LOCK(ms);
3445 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) {
3446 len += sizeof(*imr);
3447 }
3448 MESH_RT_UNLOCK(ms);
3449 if (len > ireq->i_len || ireq->i_len < sizeof(*imr)) {
3450 ireq->i_len = len;
3451 return ENOMEM;
3452 }
3453 ireq->i_len = len;
3454 /* XXX M_WAIT? */
3455 p = IEEE80211_MALLOC(len, M_TEMP,
3456 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
3457 if (p == NULL)
3458 return ENOMEM;
3459 off = 0;
3460 MESH_RT_LOCK(ms);
3461 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) {
3462 if (off >= len)
3463 break;
3464 imr = (struct ieee80211req_mesh_route *)
3465 (p + off);
3466 IEEE80211_ADDR_COPY(imr->imr_dest,
3467 rt->rt_dest);
3468 IEEE80211_ADDR_COPY(imr->imr_nexthop,
3469 rt->rt_nexthop);
3470 imr->imr_metric = rt->rt_metric;
3471 imr->imr_nhops = rt->rt_nhops;
3472 imr->imr_lifetime =
3473 ieee80211_mesh_rt_update(rt, 0);
3474 imr->imr_lastmseq = rt->rt_lastmseq;
3475 imr->imr_flags = rt->rt_flags; /* last */
3476 off += sizeof(*imr);
3477 }
3478 MESH_RT_UNLOCK(ms);
3479 error = copyout(p, (uint8_t *)ireq->i_data,
3480 ireq->i_len);
3481 IEEE80211_FREE(p, M_TEMP);
3482 break;
3483 case IEEE80211_MESH_RTCMD_FLUSH:
3484 case IEEE80211_MESH_RTCMD_ADD:
3485 case IEEE80211_MESH_RTCMD_DELETE:
3486 return EINVAL;
3487 default:
3488 return ENOSYS;
3489 }
3490 break;
3491 case IEEE80211_IOC_MESH_PR_METRIC:
3492 len = strlen(ms->ms_pmetric->mpm_descr);
3493 if (ireq->i_len < len)
3494 return EINVAL;
3495 ireq->i_len = len;
3496 error = copyout(ms->ms_pmetric->mpm_descr,
3497 (uint8_t *)ireq->i_data, len);
3498 break;
3499 case IEEE80211_IOC_MESH_PR_PATH:
3500 len = strlen(ms->ms_ppath->mpp_descr);
3501 if (ireq->i_len < len)
3502 return EINVAL;
3503 ireq->i_len = len;
3504 error = copyout(ms->ms_ppath->mpp_descr,
3505 (uint8_t *)ireq->i_data, len);
3506 break;
3507 default:
3508 return ENOSYS;
3509 }
3510
3511 return error;
3512 }
3513 IEEE80211_IOCTL_GET(mesh, mesh_ioctl_get80211);
3514
3515 static int
3516 mesh_ioctl_set80211(struct ieee80211vap *vap, struct ieee80211req *ireq)
3517 {
3518 struct ieee80211_mesh_state *ms = vap->iv_mesh;
3519 uint8_t tmpmeshid[IEEE80211_NWID_LEN];
3520 uint8_t tmpaddr[IEEE80211_ADDR_LEN];
3521 char tmpproto[IEEE80211_MESH_PROTO_DSZ];
3522 int error;
3523
3524 if (vap->iv_opmode != IEEE80211_M_MBSS)
3525 return ENOSYS;
3526
3527 error = 0;
3528 switch (ireq->i_type) {
3529 case IEEE80211_IOC_MESH_ID:
3530 if (ireq->i_val != 0 || ireq->i_len > IEEE80211_MESHID_LEN)
3531 return EINVAL;
3532 error = copyin(ireq->i_data, tmpmeshid, ireq->i_len);
3533 if (error != 0)
3534 break;
3535 memset(ms->ms_id, 0, IEEE80211_NWID_LEN);
3536 ms->ms_idlen = ireq->i_len;
3537 memcpy(ms->ms_id, tmpmeshid, ireq->i_len);
3538 error = ENETRESET;
3539 break;
3540 case IEEE80211_IOC_MESH_AP:
3541 if (ireq->i_val)
3542 ms->ms_flags |= IEEE80211_MESHFLAGS_AP;
3543 else
3544 ms->ms_flags &= ~IEEE80211_MESHFLAGS_AP;
3545 error = ENETRESET;
3546 break;
3547 case IEEE80211_IOC_MESH_FWRD:
3548 if (ireq->i_val)
3549 ms->ms_flags |= IEEE80211_MESHFLAGS_FWD;
3550 else
3551 ms->ms_flags &= ~IEEE80211_MESHFLAGS_FWD;
3552 mesh_gatemode_setup(vap);
3553 break;
3554 case IEEE80211_IOC_MESH_GATE:
3555 if (ireq->i_val)
3556 ms->ms_flags |= IEEE80211_MESHFLAGS_GATE;
3557 else
3558 ms->ms_flags &= ~IEEE80211_MESHFLAGS_GATE;
3559 break;
3560 case IEEE80211_IOC_MESH_TTL:
3561 ms->ms_ttl = (uint8_t) ireq->i_val;
3562 break;
3563 case IEEE80211_IOC_MESH_RTCMD:
3564 switch (ireq->i_val) {
3565 case IEEE80211_MESH_RTCMD_LIST:
3566 return EINVAL;
3567 case IEEE80211_MESH_RTCMD_FLUSH:
3568 ieee80211_mesh_rt_flush(vap);
3569 break;
3570 case IEEE80211_MESH_RTCMD_ADD:
3571 error = copyin(ireq->i_data, tmpaddr,
3572 IEEE80211_ADDR_LEN);
3573 if (error != 0)
3574 break;
3575 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, tmpaddr) ||
3576 IEEE80211_ADDR_EQ(broadcastaddr, tmpaddr))
3577 return EINVAL;
3578 ieee80211_mesh_discover(vap, tmpaddr, NULL);
3579 break;
3580 case IEEE80211_MESH_RTCMD_DELETE:
3581 error = copyin(ireq->i_data, tmpaddr,
3582 IEEE80211_ADDR_LEN);
3583 if (error != 0)
3584 break;
3585 ieee80211_mesh_rt_del(vap, tmpaddr);
3586 break;
3587 default:
3588 return ENOSYS;
3589 }
3590 break;
3591 case IEEE80211_IOC_MESH_PR_METRIC:
3592 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto));
3593 if (error == 0) {
3594 error = mesh_select_proto_metric(vap, tmpproto);
3595 if (error == 0)
3596 error = ENETRESET;
3597 }
3598 break;
3599 case IEEE80211_IOC_MESH_PR_PATH:
3600 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto));
3601 if (error == 0) {
3602 error = mesh_select_proto_path(vap, tmpproto);
3603 if (error == 0)
3604 error = ENETRESET;
3605 }
3606 break;
3607 default:
3608 return ENOSYS;
3609 }
3610 return error;
3611 }
3612 IEEE80211_IOCTL_SET(mesh, mesh_ioctl_set80211);
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