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acpi: Narrow workaround for broken interrupt settings
[dragonfly.git] / sys / netproto / 802_11 / wlan / ieee80211_mesh.c
blobd2bc914136b8ab1933bc1dd15bf58c4428e80068
1 /*-
2 * Copyright (c) 2009 The FreeBSD Foundation
3 * All rights reserved.
4 *
5 * This software was developed by Rui Paulo under sponsorship from the
6 * FreeBSD Foundation.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29 #include <sys/cdefs.h>
30 #ifdef __FreeBSD__
31 __FBSDID("$FreeBSD$");
32 #endif
33
34 /*
35 * IEEE 802.11s Mesh Point (MBSS) support.
36 *
37 * Based on March 2009, D3.0 802.11s draft spec.
38 */
39 #include "opt_inet.h"
40 #include "opt_wlan.h"
41
42 #include <sys/param.h>
43 #include <sys/systm.h>
44 #include <sys/mbuf.h>
45 #include <sys/malloc.h>
46 #include <sys/kernel.h>
47
48 #include <sys/socket.h>
49 #include <sys/sockio.h>
50 #include <sys/endian.h>
51 #include <sys/errno.h>
52 #include <sys/proc.h>
53 #include <sys/sysctl.h>
54
55 #include <net/bpf.h>
56 #include <net/if.h>
57 #include <net/if_var.h>
58 #include <net/if_media.h>
59 #include <net/if_llc.h>
60 #include <net/ethernet.h>
61
62 #include <netproto/802_11/ieee80211_var.h>
63 #include <netproto/802_11/ieee80211_action.h>
64 #ifdef IEEE80211_SUPPORT_SUPERG
65 #include <netproto/802_11/ieee80211_superg.h>
66 #endif
67 #include <netproto/802_11/ieee80211_input.h>
68 #include <netproto/802_11/ieee80211_mesh.h>
69
70 static void mesh_rt_flush_invalid(struct ieee80211vap *);
71 static int mesh_select_proto_path(struct ieee80211vap *, const char *);
72 static int mesh_select_proto_metric(struct ieee80211vap *, const char *);
73 static void mesh_vattach(struct ieee80211vap *);
74 static int mesh_newstate(struct ieee80211vap *, enum ieee80211_state, int);
75 static void mesh_rt_cleanup_cb(void *);
76 static void mesh_gatemode_setup(struct ieee80211vap *);
77 static void mesh_gatemode_cb(void *);
78 static void mesh_linkchange(struct ieee80211_node *,
79 enum ieee80211_mesh_mlstate);
80 static void mesh_checkid(void *, struct ieee80211_node *);
81 static uint32_t mesh_generateid(struct ieee80211vap *);
82 static int mesh_checkpseq(struct ieee80211vap *,
83 const uint8_t [IEEE80211_ADDR_LEN], uint32_t);
84 static void mesh_transmit_to_gate(struct ieee80211vap *, struct mbuf *,
85 struct ieee80211_mesh_route *);
86 static void mesh_forward(struct ieee80211vap *, struct mbuf *,
87 const struct ieee80211_meshcntl *);
88 static int mesh_input(struct ieee80211_node *, struct mbuf *,
89 const struct ieee80211_rx_stats *rxs, int, int);
90 static void mesh_recv_mgmt(struct ieee80211_node *, struct mbuf *, int,
91 const struct ieee80211_rx_stats *rxs, int, int);
92 static void mesh_recv_ctl(struct ieee80211_node *, struct mbuf *, int);
93 static void mesh_peer_timeout_setup(struct ieee80211_node *);
94 static void mesh_peer_timeout_backoff(struct ieee80211_node *);
95 static void mesh_peer_timeout_cb(void *);
96 static __inline void
97 mesh_peer_timeout_stop(struct ieee80211_node *);
98 static int mesh_verify_meshid(struct ieee80211vap *, const uint8_t *);
99 static int mesh_verify_meshconf(struct ieee80211vap *, const uint8_t *);
100 static int mesh_verify_meshpeer(struct ieee80211vap *, uint8_t,
101 const uint8_t *);
102 uint32_t mesh_airtime_calc(struct ieee80211_node *);
103
104 /*
105 * Timeout values come from the specification and are in milliseconds.
106 */
107 static SYSCTL_NODE(_net_wlan, OID_AUTO, mesh, CTLFLAG_RD, 0,
108 "IEEE 802.11s parameters");
109 static int ieee80211_mesh_gateint = -1;
110 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, gateint, CTLTYPE_INT | CTLFLAG_RW,
111 &ieee80211_mesh_gateint, 0, ieee80211_sysctl_msecs_ticks, "I",
112 "mesh gate interval (ms)");
113 static int ieee80211_mesh_retrytimeout = -1;
114 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, retrytimeout, CTLTYPE_INT | CTLFLAG_RW,
115 &ieee80211_mesh_retrytimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
116 "Retry timeout (msec)");
117 static int ieee80211_mesh_holdingtimeout = -1;
118
119 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, holdingtimeout, CTLTYPE_INT | CTLFLAG_RW,
120 &ieee80211_mesh_holdingtimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
121 "Holding state timeout (msec)");
122 static int ieee80211_mesh_confirmtimeout = -1;
123 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, confirmtimeout, CTLTYPE_INT | CTLFLAG_RW,
124 &ieee80211_mesh_confirmtimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
125 "Confirm state timeout (msec)");
126 static int ieee80211_mesh_backofftimeout = -1;
127 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, backofftimeout, CTLTYPE_INT | CTLFLAG_RW,
128 &ieee80211_mesh_backofftimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
129 "Backoff timeout (msec). This is to throutles peering forever when "
130 "not receiving answer or is rejected by a neighbor");
131 static int ieee80211_mesh_maxretries = 2;
132 SYSCTL_INT(_net_wlan_mesh, OID_AUTO, maxretries, CTLFLAG_RW,
133 &ieee80211_mesh_maxretries, 0,
134 "Maximum retries during peer link establishment");
135 static int ieee80211_mesh_maxholding = 2;
136 SYSCTL_INT(_net_wlan_mesh, OID_AUTO, maxholding, CTLFLAG_RW,
137 &ieee80211_mesh_maxholding, 0,
138 "Maximum times we are allowed to transition to HOLDING state before "
139 "backinoff during peer link establishment");
140
141 static const uint8_t broadcastaddr[IEEE80211_ADDR_LEN] =
142 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
143
144 static ieee80211_recv_action_func mesh_recv_action_meshpeering_open;
145 static ieee80211_recv_action_func mesh_recv_action_meshpeering_confirm;
146 static ieee80211_recv_action_func mesh_recv_action_meshpeering_close;
147 static ieee80211_recv_action_func mesh_recv_action_meshlmetric;
148 static ieee80211_recv_action_func mesh_recv_action_meshgate;
149
150 static ieee80211_send_action_func mesh_send_action_meshpeering_open;
151 static ieee80211_send_action_func mesh_send_action_meshpeering_confirm;
152 static ieee80211_send_action_func mesh_send_action_meshpeering_close;
153 static ieee80211_send_action_func mesh_send_action_meshlmetric;
154 static ieee80211_send_action_func mesh_send_action_meshgate;
155
156 static const struct ieee80211_mesh_proto_metric mesh_metric_airtime = {
157 .mpm_descr = "AIRTIME",
158 .mpm_ie = IEEE80211_MESHCONF_METRIC_AIRTIME,
159 .mpm_metric = mesh_airtime_calc,
160 };
161
162 static struct ieee80211_mesh_proto_path mesh_proto_paths[4];
163 static struct ieee80211_mesh_proto_metric mesh_proto_metrics[4];
164
165 MALLOC_DEFINE(M_80211_MESH_PREQ, "80211preq", "802.11 MESH Path Request frame");
166 MALLOC_DEFINE(M_80211_MESH_PREP, "80211prep", "802.11 MESH Path Reply frame");
167 MALLOC_DEFINE(M_80211_MESH_PERR, "80211perr", "802.11 MESH Path Error frame");
168
169 /* The longer one of the lifetime should be stored as new lifetime */
170 #define MESH_ROUTE_LIFETIME_MAX(a, b) (a > b ? a : b)
171
172 MALLOC_DEFINE(M_80211_MESH_RT, "80211mesh_rt", "802.11s routing table");
173 MALLOC_DEFINE(M_80211_MESH_GT_RT, "80211mesh_gt", "802.11s known gates table");
174
175 /*
176 * Helper functions to manipulate the Mesh routing table.
177 */
178
179 static struct ieee80211_mesh_route *
180 mesh_rt_find_locked(struct ieee80211_mesh_state *ms,
181 const uint8_t dest[IEEE80211_ADDR_LEN])
182 {
183 struct ieee80211_mesh_route *rt;
184
185 MESH_RT_LOCK_ASSERT(ms);
186
187 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) {
188 if (IEEE80211_ADDR_EQ(dest, rt->rt_dest))
189 return rt;
190 }
191 return NULL;
192 }
193
194 static struct ieee80211_mesh_route *
195 mesh_rt_add_locked(struct ieee80211vap *vap,
196 const uint8_t dest[IEEE80211_ADDR_LEN])
197 {
198 struct ieee80211_mesh_state *ms = vap->iv_mesh;
199 struct ieee80211_mesh_route *rt;
200
201 KASSERT(!IEEE80211_ADDR_EQ(broadcastaddr, dest),
202 ("%s: adding broadcast to the routing table", __func__));
203
204 MESH_RT_LOCK_ASSERT(ms);
205
206 #if defined(__DragonFly__)
207 rt = kmalloc(ALIGN(sizeof(struct ieee80211_mesh_route)) +
208 ms->ms_ppath->mpp_privlen, M_80211_MESH_RT, M_INTWAIT | M_ZERO);
209 #else
210 rt = IEEE80211_MALLOC(ALIGN(sizeof(struct ieee80211_mesh_route)) +
211 ms->ms_ppath->mpp_privlen, M_80211_MESH_RT,
212 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
213 #endif
214 if (rt != NULL) {
215 rt->rt_vap = vap;
216 IEEE80211_ADDR_COPY(rt->rt_dest, dest);
217 rt->rt_priv = (void *)ALIGN(&rt[1]);
218 MESH_RT_ENTRY_LOCK_INIT(rt, "MBSS_RT");
219 #if defined(__DragonFly__)
220 callout_init_mp(&rt->rt_discovery);
221 #else
222 callout_init(&rt->rt_discovery, 1);
223 #endif
224 rt->rt_updtime = ticks; /* create time */
225 TAILQ_INSERT_TAIL(&ms->ms_routes, rt, rt_next);
226 }
227 return rt;
228 }
229
230 struct ieee80211_mesh_route *
231 ieee80211_mesh_rt_find(struct ieee80211vap *vap,
232 const uint8_t dest[IEEE80211_ADDR_LEN])
233 {
234 struct ieee80211_mesh_state *ms = vap->iv_mesh;
235 struct ieee80211_mesh_route *rt;
236
237 MESH_RT_LOCK(ms);
238 rt = mesh_rt_find_locked(ms, dest);
239 MESH_RT_UNLOCK(ms);
240 return rt;
241 }
242
243 struct ieee80211_mesh_route *
244 ieee80211_mesh_rt_add(struct ieee80211vap *vap,
245 const uint8_t dest[IEEE80211_ADDR_LEN])
246 {
247 struct ieee80211_mesh_state *ms = vap->iv_mesh;
248 struct ieee80211_mesh_route *rt;
249
250 KASSERT(ieee80211_mesh_rt_find(vap, dest) == NULL,
251 ("%s: duplicate entry in the routing table", __func__));
252 KASSERT(!IEEE80211_ADDR_EQ(vap->iv_myaddr, dest),
253 ("%s: adding self to the routing table", __func__));
254
255 MESH_RT_LOCK(ms);
256 rt = mesh_rt_add_locked(vap, dest);
257 MESH_RT_UNLOCK(ms);
258 return rt;
259 }
260
261 /*
262 * Update the route lifetime and returns the updated lifetime.
263 * If new_lifetime is zero and route is timedout it will be invalidated.
264 * new_lifetime is in msec
265 */
266 int
267 ieee80211_mesh_rt_update(struct ieee80211_mesh_route *rt, int new_lifetime)
268 {
269 int timesince, now;
270 uint32_t lifetime = 0;
271
272 KASSERT(rt != NULL, ("route is NULL"));
273
274 now = ticks;
275 MESH_RT_ENTRY_LOCK(rt);
276
277 /* dont clobber a proxy entry gated by us */
278 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY && rt->rt_nhops == 0) {
279 MESH_RT_ENTRY_UNLOCK(rt);
280 return rt->rt_lifetime;
281 }
282
283 timesince = ticks_to_msecs(now - rt->rt_updtime);
284 rt->rt_updtime = now;
285 if (timesince >= rt->rt_lifetime) {
286 if (new_lifetime != 0) {
287 rt->rt_lifetime = new_lifetime;
288 }
289 else {
290 rt->rt_flags &= ~IEEE80211_MESHRT_FLAGS_VALID;
291 rt->rt_lifetime = 0;
292 }
293 } else {
294 /* update what is left of lifetime */
295 rt->rt_lifetime = rt->rt_lifetime - timesince;
296 rt->rt_lifetime = MESH_ROUTE_LIFETIME_MAX(
297 new_lifetime, rt->rt_lifetime);
298 }
299 lifetime = rt->rt_lifetime;
300 MESH_RT_ENTRY_UNLOCK(rt);
301
302 return lifetime;
303 }
304
305 /*
306 * Add a proxy route (as needed) for the specified destination.
307 */
308 void
309 ieee80211_mesh_proxy_check(struct ieee80211vap *vap,
310 const uint8_t dest[IEEE80211_ADDR_LEN])
311 {
312 struct ieee80211_mesh_state *ms = vap->iv_mesh;
313 struct ieee80211_mesh_route *rt;
314
315 MESH_RT_LOCK(ms);
316 rt = mesh_rt_find_locked(ms, dest);
317 if (rt == NULL) {
318 rt = mesh_rt_add_locked(vap, dest);
319 if (rt == NULL) {
320 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
321 "%s", "unable to add proxy entry");
322 vap->iv_stats.is_mesh_rtaddfailed++;
323 } else {
324 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
325 "%s", "add proxy entry");
326 IEEE80211_ADDR_COPY(rt->rt_mesh_gate, vap->iv_myaddr);
327 IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr);
328 rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID
329 | IEEE80211_MESHRT_FLAGS_PROXY;
330 }
331 } else if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) {
332 KASSERT(rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY,
333 ("no proxy flag for poxy entry"));
334 struct ieee80211com *ic = vap->iv_ic;
335 /*
336 * Fix existing entry created by received frames from
337 * stations that have some memory of dest. We also
338 * flush any frames held on the staging queue; delivering
339 * them is too much trouble right now.
340 */
341 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
342 "%s", "fix proxy entry");
343 IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr);
344 rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID
345 | IEEE80211_MESHRT_FLAGS_PROXY;
346 /* XXX belongs in hwmp */
347 ieee80211_ageq_drain_node(&ic->ic_stageq,
348 (void *)(uintptr_t) ieee80211_mac_hash(ic, dest));
349 /* XXX stat? */
350 }
351 MESH_RT_UNLOCK(ms);
352 }
353
354 static __inline void
355 mesh_rt_del(struct ieee80211_mesh_state *ms, struct ieee80211_mesh_route *rt)
356 {
357 TAILQ_REMOVE(&ms->ms_routes, rt, rt_next);
358 /*
359 * Grab the lock before destroying it, to be sure no one else
360 * is holding the route.
361 */
362 MESH_RT_ENTRY_LOCK(rt);
363 callout_drain(&rt->rt_discovery);
364 MESH_RT_ENTRY_LOCK_DESTROY(rt);
365 IEEE80211_FREE(rt, M_80211_MESH_RT);
366 }
367
368 void
369 ieee80211_mesh_rt_del(struct ieee80211vap *vap,
370 const uint8_t dest[IEEE80211_ADDR_LEN])
371 {
372 struct ieee80211_mesh_state *ms = vap->iv_mesh;
373 struct ieee80211_mesh_route *rt, *next;
374
375 MESH_RT_LOCK(ms);
376 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) {
377 if (IEEE80211_ADDR_EQ(rt->rt_dest, dest)) {
378 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) {
379 ms->ms_ppath->mpp_senderror(vap, dest, rt,
380 IEEE80211_REASON_MESH_PERR_NO_PROXY);
381 } else {
382 ms->ms_ppath->mpp_senderror(vap, dest, rt,
383 IEEE80211_REASON_MESH_PERR_DEST_UNREACH);
384 }
385 mesh_rt_del(ms, rt);
386 MESH_RT_UNLOCK(ms);
387 return;
388 }
389 }
390 MESH_RT_UNLOCK(ms);
391 }
392
393 void
394 ieee80211_mesh_rt_flush(struct ieee80211vap *vap)
395 {
396 struct ieee80211_mesh_state *ms = vap->iv_mesh;
397 struct ieee80211_mesh_route *rt, *next;
398
399 if (ms == NULL)
400 return;
401 MESH_RT_LOCK(ms);
402 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next)
403 mesh_rt_del(ms, rt);
404 MESH_RT_UNLOCK(ms);
405 }
406
407 void
408 ieee80211_mesh_rt_flush_peer(struct ieee80211vap *vap,
409 const uint8_t peer[IEEE80211_ADDR_LEN])
410 {
411 struct ieee80211_mesh_state *ms = vap->iv_mesh;
412 struct ieee80211_mesh_route *rt, *next;
413
414 MESH_RT_LOCK(ms);
415 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) {
416 if (IEEE80211_ADDR_EQ(rt->rt_nexthop, peer))
417 mesh_rt_del(ms, rt);
418 }
419 MESH_RT_UNLOCK(ms);
420 }
421
422 /*
423 * Flush expired routing entries, i.e. those in invalid state for
424 * some time.
425 */
426 static void
427 mesh_rt_flush_invalid(struct ieee80211vap *vap)
428 {
429 struct ieee80211_mesh_state *ms = vap->iv_mesh;
430 struct ieee80211_mesh_route *rt, *next;
431
432 if (ms == NULL)
433 return;
434 MESH_RT_LOCK(ms);
435 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) {
436 /* Discover paths will be deleted by their own callout */
437 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_DISCOVER)
438 continue;
439 ieee80211_mesh_rt_update(rt, 0);
440 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0)
441 mesh_rt_del(ms, rt);
442 }
443 MESH_RT_UNLOCK(ms);
444 }
445
446 int
447 ieee80211_mesh_register_proto_path(const struct ieee80211_mesh_proto_path *mpp)
448 {
449 int i, firstempty = -1;
450
451 for (i = 0; i < nitems(mesh_proto_paths); i++) {
452 if (strncmp(mpp->mpp_descr, mesh_proto_paths[i].mpp_descr,
453 IEEE80211_MESH_PROTO_DSZ) == 0)
454 return EEXIST;
455 if (!mesh_proto_paths[i].mpp_active && firstempty == -1)
456 firstempty = i;
457 }
458 if (firstempty < 0)
459 return ENOSPC;
460 memcpy(&mesh_proto_paths[firstempty], mpp, sizeof(*mpp));
461 mesh_proto_paths[firstempty].mpp_active = 1;
462 return 0;
463 }
464
465 int
466 ieee80211_mesh_register_proto_metric(const struct
467 ieee80211_mesh_proto_metric *mpm)
468 {
469 int i, firstempty = -1;
470
471 for (i = 0; i < nitems(mesh_proto_metrics); i++) {
472 if (strncmp(mpm->mpm_descr, mesh_proto_metrics[i].mpm_descr,
473 IEEE80211_MESH_PROTO_DSZ) == 0)
474 return EEXIST;
475 if (!mesh_proto_metrics[i].mpm_active && firstempty == -1)
476 firstempty = i;
477 }
478 if (firstempty < 0)
479 return ENOSPC;
480 memcpy(&mesh_proto_metrics[firstempty], mpm, sizeof(*mpm));
481 mesh_proto_metrics[firstempty].mpm_active = 1;
482 return 0;
483 }
484
485 static int
486 mesh_select_proto_path(struct ieee80211vap *vap, const char *name)
487 {
488 struct ieee80211_mesh_state *ms = vap->iv_mesh;
489 int i;
490
491 for (i = 0; i < nitems(mesh_proto_paths); i++) {
492 if (strcasecmp(mesh_proto_paths[i].mpp_descr, name) == 0) {
493 ms->ms_ppath = &mesh_proto_paths[i];
494 return 0;
495 }
496 }
497 return ENOENT;
498 }
499
500 static int
501 mesh_select_proto_metric(struct ieee80211vap *vap, const char *name)
502 {
503 struct ieee80211_mesh_state *ms = vap->iv_mesh;
504 int i;
505
506 for (i = 0; i < nitems(mesh_proto_metrics); i++) {
507 if (strcasecmp(mesh_proto_metrics[i].mpm_descr, name) == 0) {
508 ms->ms_pmetric = &mesh_proto_metrics[i];
509 return 0;
510 }
511 }
512 return ENOENT;
513 }
514
515 static void
516 mesh_gatemode_setup(struct ieee80211vap *vap)
517 {
518 struct ieee80211_mesh_state *ms = vap->iv_mesh;
519
520 /*
521 * NB: When a mesh gate is running as a ROOT it shall
522 * not send out periodic GANNs but instead mark the
523 * mesh gate flag for the corresponding proactive PREQ
524 * and RANN frames.
525 */
526 if (ms->ms_flags & IEEE80211_MESHFLAGS_ROOT ||
527 (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) == 0) {
528 callout_drain(&ms->ms_gatetimer);
529 return ;
530 }
531 callout_reset(&ms->ms_gatetimer, ieee80211_mesh_gateint,
532 mesh_gatemode_cb, vap);
533 }
534
535 static void
536 mesh_gatemode_cb(void *arg)
537 {
538 struct ieee80211vap *vap = (struct ieee80211vap *)arg;
539 struct ieee80211_mesh_state *ms = vap->iv_mesh;
540 struct ieee80211_meshgann_ie gann;
541
542 gann.gann_flags = 0; /* Reserved */
543 gann.gann_hopcount = 0;
544 gann.gann_ttl = ms->ms_ttl;
545 IEEE80211_ADDR_COPY(gann.gann_addr, vap->iv_myaddr);
546 gann.gann_seq = ms->ms_gateseq++;
547 gann.gann_interval = ieee80211_mesh_gateint;
548
549 IEEE80211_NOTE(vap, IEEE80211_MSG_MESH, vap->iv_bss,
550 "send broadcast GANN (seq %u)", gann.gann_seq);
551
552 ieee80211_send_action(vap->iv_bss, IEEE80211_ACTION_CAT_MESH,
553 IEEE80211_ACTION_MESH_GANN, &gann);
554 mesh_gatemode_setup(vap);
555 }
556
557 static void
558 ieee80211_mesh_init(void)
559 {
560
561 memset(mesh_proto_paths, 0, sizeof(mesh_proto_paths));
562 memset(mesh_proto_metrics, 0, sizeof(mesh_proto_metrics));
563
564 /*
565 * Setup mesh parameters that depends on the clock frequency.
566 */
567 ieee80211_mesh_gateint = msecs_to_ticks(10000);
568 ieee80211_mesh_retrytimeout = msecs_to_ticks(40);
569 ieee80211_mesh_holdingtimeout = msecs_to_ticks(40);
570 ieee80211_mesh_confirmtimeout = msecs_to_ticks(40);
571 ieee80211_mesh_backofftimeout = msecs_to_ticks(5000);
572
573 /*
574 * Register action frame handlers.
575 */
576 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
577 IEEE80211_ACTION_MESHPEERING_OPEN,
578 mesh_recv_action_meshpeering_open);
579 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
580 IEEE80211_ACTION_MESHPEERING_CONFIRM,
581 mesh_recv_action_meshpeering_confirm);
582 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
583 IEEE80211_ACTION_MESHPEERING_CLOSE,
584 mesh_recv_action_meshpeering_close);
585 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESH,
586 IEEE80211_ACTION_MESH_LMETRIC, mesh_recv_action_meshlmetric);
587 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESH,
588 IEEE80211_ACTION_MESH_GANN, mesh_recv_action_meshgate);
589
590 ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
591 IEEE80211_ACTION_MESHPEERING_OPEN,
592 mesh_send_action_meshpeering_open);
593 ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
594 IEEE80211_ACTION_MESHPEERING_CONFIRM,
595 mesh_send_action_meshpeering_confirm);
596 ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
597 IEEE80211_ACTION_MESHPEERING_CLOSE,
598 mesh_send_action_meshpeering_close);
599 ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESH,
600 IEEE80211_ACTION_MESH_LMETRIC,
601 mesh_send_action_meshlmetric);
602 ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESH,
603 IEEE80211_ACTION_MESH_GANN,
604 mesh_send_action_meshgate);
605
606 /*
607 * Register Airtime Link Metric.
608 */
609 ieee80211_mesh_register_proto_metric(&mesh_metric_airtime);
610
611 }
612 SYSINIT(wlan_mesh, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_mesh_init, NULL);
613
614 void
615 ieee80211_mesh_attach(struct ieee80211com *ic)
616 {
617 ic->ic_vattach[IEEE80211_M_MBSS] = mesh_vattach;
618 }
619
620 void
621 ieee80211_mesh_detach(struct ieee80211com *ic)
622 {
623 }
624
625 static void
626 mesh_vdetach_peers(void *arg, struct ieee80211_node *ni)
627 {
628 struct ieee80211com *ic = ni->ni_ic;
629 uint16_t args[3];
630
631 if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED) {
632 args[0] = ni->ni_mlpid;
633 args[1] = ni->ni_mllid;
634 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
635 ieee80211_send_action(ni,
636 IEEE80211_ACTION_CAT_SELF_PROT,
637 IEEE80211_ACTION_MESHPEERING_CLOSE,
638 args);
639 }
640 callout_drain(&ni->ni_mltimer);
641 /* XXX belongs in hwmp */
642 ieee80211_ageq_drain_node(&ic->ic_stageq,
643 (void *)(uintptr_t) ieee80211_mac_hash(ic, ni->ni_macaddr));
644 }
645
646 static void
647 mesh_vdetach(struct ieee80211vap *vap)
648 {
649 struct ieee80211_mesh_state *ms = vap->iv_mesh;
650
651 callout_drain(&ms->ms_cleantimer);
652 ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_vdetach_peers,
653 NULL);
654 ieee80211_mesh_rt_flush(vap);
655 MESH_RT_LOCK_DESTROY(ms);
656 ms->ms_ppath->mpp_vdetach(vap);
657 IEEE80211_FREE(vap->iv_mesh, M_80211_VAP);
658 vap->iv_mesh = NULL;
659 }
660
661 static void
662 mesh_vattach(struct ieee80211vap *vap)
663 {
664 struct ieee80211_mesh_state *ms;
665 vap->iv_newstate = mesh_newstate;
666 vap->iv_input = mesh_input;
667 vap->iv_opdetach = mesh_vdetach;
668 vap->iv_recv_mgmt = mesh_recv_mgmt;
669 vap->iv_recv_ctl = mesh_recv_ctl;
670 #if defined(__DragonFly__)
671 ms = kmalloc(sizeof(struct ieee80211_mesh_state), M_80211_VAP,
672 M_INTWAIT | M_ZERO);
673 #else
674 ms = IEEE80211_MALLOC(sizeof(struct ieee80211_mesh_state), M_80211_VAP,
675 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
676 #endif
677 if (ms == NULL) {
678 kprintf("%s: couldn't alloc MBSS state\n", __func__);
679 return;
680 }
681 vap->iv_mesh = ms;
682 ms->ms_seq = 0;
683 ms->ms_flags = (IEEE80211_MESHFLAGS_AP | IEEE80211_MESHFLAGS_FWD);
684 ms->ms_ttl = IEEE80211_MESH_DEFAULT_TTL;
685 TAILQ_INIT(&ms->ms_known_gates);
686 TAILQ_INIT(&ms->ms_routes);
687 MESH_RT_LOCK_INIT(ms, "MBSS");
688 #if defined(__DragonFly__)
689 callout_init_mp(&ms->ms_cleantimer);
690 callout_init_mp(&ms->ms_gatetimer);
691 #else
692 callout_init(&ms->ms_cleantimer, 1);
693 callout_init(&ms->ms_gatetimer, 1);
694 #endif
695 ms->ms_gateseq = 0;
696 mesh_select_proto_metric(vap, "AIRTIME");
697 KASSERT(ms->ms_pmetric, ("ms_pmetric == NULL"));
698 mesh_select_proto_path(vap, "HWMP");
699 KASSERT(ms->ms_ppath, ("ms_ppath == NULL"));
700 ms->ms_ppath->mpp_vattach(vap);
701 }
702
703 /*
704 * IEEE80211_M_MBSS vap state machine handler.
705 */
706 static int
707 mesh_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
708 {
709 struct ieee80211_mesh_state *ms = vap->iv_mesh;
710 struct ieee80211com *ic = vap->iv_ic;
711 struct ieee80211_node *ni;
712 enum ieee80211_state ostate;
713
714 IEEE80211_LOCK_ASSERT(ic);
715
716 ostate = vap->iv_state;
717 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n",
718 __func__, ieee80211_state_name[ostate],
719 ieee80211_state_name[nstate], arg);
720 vap->iv_state = nstate; /* state transition */
721 if (ostate != IEEE80211_S_SCAN)
722 ieee80211_cancel_scan(vap); /* background scan */
723 ni = vap->iv_bss; /* NB: no reference held */
724 if (nstate != IEEE80211_S_RUN && ostate == IEEE80211_S_RUN) {
725 callout_drain(&ms->ms_cleantimer);
726 callout_drain(&ms->ms_gatetimer);
727 }
728 switch (nstate) {
729 case IEEE80211_S_INIT:
730 switch (ostate) {
731 case IEEE80211_S_SCAN:
732 ieee80211_cancel_scan(vap);
733 break;
734 case IEEE80211_S_CAC:
735 ieee80211_dfs_cac_stop(vap);
736 break;
737 case IEEE80211_S_RUN:
738 ieee80211_iterate_nodes(&ic->ic_sta,
739 mesh_vdetach_peers, NULL);
740 break;
741 default:
742 break;
743 }
744 if (ostate != IEEE80211_S_INIT) {
745 /* NB: optimize INIT -> INIT case */
746 ieee80211_reset_bss(vap);
747 ieee80211_mesh_rt_flush(vap);
748 }
749 break;
750 case IEEE80211_S_SCAN:
751 switch (ostate) {
752 case IEEE80211_S_INIT:
753 if (vap->iv_des_chan != IEEE80211_CHAN_ANYC &&
754 !IEEE80211_IS_CHAN_RADAR(vap->iv_des_chan) &&
755 ms->ms_idlen != 0) {
756 /*
757 * Already have a channel and a mesh ID; bypass
758 * the scan and startup immediately.
759 */
760 ieee80211_create_ibss(vap, vap->iv_des_chan);
761 break;
762 }
763 /*
764 * Initiate a scan. We can come here as a result
765 * of an IEEE80211_IOC_SCAN_REQ too in which case
766 * the vap will be marked with IEEE80211_FEXT_SCANREQ
767 * and the scan request parameters will be present
768 * in iv_scanreq. Otherwise we do the default.
769 */
770 if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) {
771 ieee80211_check_scan(vap,
772 vap->iv_scanreq_flags,
773 vap->iv_scanreq_duration,
774 vap->iv_scanreq_mindwell,
775 vap->iv_scanreq_maxdwell,
776 vap->iv_scanreq_nssid, vap->iv_scanreq_ssid);
777 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ;
778 } else
779 ieee80211_check_scan_current(vap);
780 break;
781 default:
782 break;
783 }
784 break;
785 case IEEE80211_S_CAC:
786 /*
787 * Start CAC on a DFS channel. We come here when starting
788 * a bss on a DFS channel (see ieee80211_create_ibss).
789 */
790 ieee80211_dfs_cac_start(vap);
791 break;
792 case IEEE80211_S_RUN:
793 switch (ostate) {
794 case IEEE80211_S_INIT:
795 /*
796 * Already have a channel; bypass the
797 * scan and startup immediately.
798 * Note that ieee80211_create_ibss will call
799 * back to do a RUN->RUN state change.
800 */
801 ieee80211_create_ibss(vap,
802 ieee80211_ht_adjust_channel(ic,
803 ic->ic_curchan, vap->iv_flags_ht));
804 /* NB: iv_bss is changed on return */
805 break;
806 case IEEE80211_S_CAC:
807 /*
808 * NB: This is the normal state change when CAC
809 * expires and no radar was detected; no need to
810 * clear the CAC timer as it's already expired.
811 */
812 /* fall thru... */
813 case IEEE80211_S_CSA:
814 #if 0
815 /*
816 * Shorten inactivity timer of associated stations
817 * to weed out sta's that don't follow a CSA.
818 */
819 ieee80211_iterate_nodes(&ic->ic_sta, sta_csa, vap);
820 #endif
821 /*
822 * Update bss node channel to reflect where
823 * we landed after CSA.
824 */
825 ieee80211_node_set_chan(vap->iv_bss,
826 ieee80211_ht_adjust_channel(ic, ic->ic_curchan,
827 ieee80211_htchanflags(vap->iv_bss->ni_chan)));
828 /* XXX bypass debug msgs */
829 break;
830 case IEEE80211_S_SCAN:
831 case IEEE80211_S_RUN:
832 #ifdef IEEE80211_DEBUG
833 if (ieee80211_msg_debug(vap)) {
834 struct ieee80211_node *ni = vap->iv_bss;
835 ieee80211_note(vap,
836 "synchronized with %s meshid ",
837 ether_sprintf(ni->ni_meshid));
838 ieee80211_print_essid(ni->ni_meshid,
839 ni->ni_meshidlen);
840 /* XXX MCS/HT */
841 kprintf(" channel %d\n",
842 ieee80211_chan2ieee(ic, ic->ic_curchan));
843 }
844 #endif
845 break;
846 default:
847 break;
848 }
849 ieee80211_node_authorize(vap->iv_bss);
850 callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact,
851 mesh_rt_cleanup_cb, vap);
852 mesh_gatemode_setup(vap);
853 break;
854 default:
855 break;
856 }
857 /* NB: ostate not nstate */
858 ms->ms_ppath->mpp_newstate(vap, ostate, arg);
859 return 0;
860 }
861
862 static void
863 mesh_rt_cleanup_cb(void *arg)
864 {
865 struct ieee80211vap *vap = arg;
866 struct ieee80211_mesh_state *ms = vap->iv_mesh;
867
868 mesh_rt_flush_invalid(vap);
869 callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact,
870 mesh_rt_cleanup_cb, vap);
871 }
872
873 /*
874 * Mark a mesh STA as gate and return a pointer to it.
875 * If this is first time, we create a new gate route.
876 * Always update the path route to this mesh gate.
877 */
878 struct ieee80211_mesh_gate_route *
879 ieee80211_mesh_mark_gate(struct ieee80211vap *vap, const uint8_t *addr,
880 struct ieee80211_mesh_route *rt)
881 {
882 struct ieee80211_mesh_state *ms = vap->iv_mesh;
883 struct ieee80211_mesh_gate_route *gr = NULL, *next;
884 int found = 0;
885
886 MESH_RT_LOCK(ms);
887 TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) {
888 if (IEEE80211_ADDR_EQ(gr->gr_addr, addr)) {
889 found = 1;
890 break;
891 }
892 }
893
894 if (!found) {
895 /* New mesh gate add it to known table. */
896 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, addr,
897 "%s", "stored new gate information from pro-PREQ.");
898 #if defined(__DragonFly__)
899 gr = kmalloc(ALIGN(sizeof(struct ieee80211_mesh_gate_route)),
900 M_80211_MESH_GT_RT, M_INTWAIT | M_ZERO);
901 #else
902 gr = IEEE80211_MALLOC(ALIGN(sizeof(struct ieee80211_mesh_gate_route)),
903 M_80211_MESH_GT_RT,
904 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
905 #endif
906 IEEE80211_ADDR_COPY(gr->gr_addr, addr);
907 TAILQ_INSERT_TAIL(&ms->ms_known_gates, gr, gr_next);
908 }
909 gr->gr_route = rt;
910 /* TODO: link from path route to gate route */
911 MESH_RT_UNLOCK(ms);
912
913 return gr;
914 }
915
916
917 /*
918 * Helper function to note the Mesh Peer Link FSM change.
919 */
920 static void
921 mesh_linkchange(struct ieee80211_node *ni, enum ieee80211_mesh_mlstate state)
922 {
923 struct ieee80211vap *vap = ni->ni_vap;
924 struct ieee80211_mesh_state *ms = vap->iv_mesh;
925 #ifdef IEEE80211_DEBUG
926 static const char *meshlinkstates[] = {
927 [IEEE80211_NODE_MESH_IDLE] = "IDLE",
928 [IEEE80211_NODE_MESH_OPENSNT] = "OPEN SENT",
929 [IEEE80211_NODE_MESH_OPENRCV] = "OPEN RECEIVED",
930 [IEEE80211_NODE_MESH_CONFIRMRCV] = "CONFIRM RECEIVED",
931 [IEEE80211_NODE_MESH_ESTABLISHED] = "ESTABLISHED",
932 [IEEE80211_NODE_MESH_HOLDING] = "HOLDING"
933 };
934 #endif
935 IEEE80211_NOTE(vap, IEEE80211_MSG_MESH,
936 ni, "peer link: %s -> %s",
937 meshlinkstates[ni->ni_mlstate], meshlinkstates[state]);
938
939 /* track neighbor count */
940 if (state == IEEE80211_NODE_MESH_ESTABLISHED &&
941 ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) {
942 KASSERT(ms->ms_neighbors < 65535, ("neighbor count overflow"));
943 ms->ms_neighbors++;
944 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF);
945 } else if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED &&
946 state != IEEE80211_NODE_MESH_ESTABLISHED) {
947 KASSERT(ms->ms_neighbors > 0, ("neighbor count 0"));
948 ms->ms_neighbors--;
949 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF);
950 }
951 ni->ni_mlstate = state;
952 switch (state) {
953 case IEEE80211_NODE_MESH_HOLDING:
954 ms->ms_ppath->mpp_peerdown(ni);
955 break;
956 case IEEE80211_NODE_MESH_ESTABLISHED:
957 ieee80211_mesh_discover(vap, ni->ni_macaddr, NULL);
958 break;
959 default:
960 break;
961 }
962 }
963
964 /*
965 * Helper function to generate a unique local ID required for mesh
966 * peer establishment.
967 */
968 static void
969 mesh_checkid(void *arg, struct ieee80211_node *ni)
970 {
971 uint16_t *r = arg;
972
973 if (*r == ni->ni_mllid)
974 *(uint16_t *)arg = 0;
975 }
976
977 static uint32_t
978 mesh_generateid(struct ieee80211vap *vap)
979 {
980 int maxiter = 4;
981 uint16_t r;
982
983 do {
984 get_random_bytes(&r, 2);
985 ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_checkid, &r);
986 maxiter--;
987 } while (r == 0 && maxiter > 0);
988 return r;
989 }
990
991 /*
992 * Verifies if we already received this packet by checking its
993 * sequence number.
994 * Returns 0 if the frame is to be accepted, 1 otherwise.
995 */
996 static int
997 mesh_checkpseq(struct ieee80211vap *vap,
998 const uint8_t source[IEEE80211_ADDR_LEN], uint32_t seq)
999 {
1000 struct ieee80211_mesh_route *rt;
1001
1002 rt = ieee80211_mesh_rt_find(vap, source);
1003 if (rt == NULL) {
1004 rt = ieee80211_mesh_rt_add(vap, source);
1005 if (rt == NULL) {
1006 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source,
1007 "%s", "add mcast route failed");
1008 vap->iv_stats.is_mesh_rtaddfailed++;
1009 return 1;
1010 }
1011 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source,
1012 "add mcast route, mesh seqno %d", seq);
1013 rt->rt_lastmseq = seq;
1014 return 0;
1015 }
1016 if (IEEE80211_MESH_SEQ_GEQ(rt->rt_lastmseq, seq)) {
1017 return 1;
1018 } else {
1019 rt->rt_lastmseq = seq;
1020 return 0;
1021 }
1022 }
1023
1024 /*
1025 * Iterate the routing table and locate the next hop.
1026 */
1027 struct ieee80211_node *
1028 ieee80211_mesh_find_txnode(struct ieee80211vap *vap,
1029 const uint8_t dest[IEEE80211_ADDR_LEN])
1030 {
1031 struct ieee80211_mesh_route *rt;
1032
1033 rt = ieee80211_mesh_rt_find(vap, dest);
1034 if (rt == NULL)
1035 return NULL;
1036 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) {
1037 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
1038 "%s: !valid, flags 0x%x", __func__, rt->rt_flags);
1039 /* XXX stat */
1040 return NULL;
1041 }
1042 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) {
1043 rt = ieee80211_mesh_rt_find(vap, rt->rt_mesh_gate);
1044 if (rt == NULL) return NULL;
1045 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) {
1046 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
1047 "%s: meshgate !valid, flags 0x%x", __func__,
1048 rt->rt_flags);
1049 /* XXX stat */
1050 return NULL;
1051 }
1052 }
1053 return ieee80211_find_txnode(vap, rt->rt_nexthop);
1054 }
1055
1056 static void
1057 mesh_transmit_to_gate(struct ieee80211vap *vap, struct mbuf *m,
1058 struct ieee80211_mesh_route *rt_gate)
1059 {
1060 struct ifnet *ifp = vap->iv_ifp;
1061 struct ieee80211_node *ni;
1062
1063 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
1064
1065 ni = ieee80211_mesh_find_txnode(vap, rt_gate->rt_dest);
1066 if (ni == NULL) {
1067 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
1068 m_freem(m);
1069 return;
1070 }
1071
1072 /*
1073 * Send through the VAP packet transmit path.
1074 * This consumes the node ref grabbed above and
1075 * the mbuf, regardless of whether there's a problem
1076 * or not.
1077 */
1078 (void) ieee80211_vap_pkt_send_dest(vap, m, ni);
1079 }
1080
1081 /*
1082 * Forward the queued frames to known valid mesh gates.
1083 * Assume destination to be outside the MBSS (i.e. proxy entry),
1084 * If no valid mesh gates are known silently discard queued frames.
1085 * After transmitting frames to all known valid mesh gates, this route
1086 * will be marked invalid, and a new path discovery will happen in the hopes
1087 * that (at least) one of the mesh gates have a new proxy entry for us to use.
1088 */
1089 void
1090 ieee80211_mesh_forward_to_gates(struct ieee80211vap *vap,
1091 struct ieee80211_mesh_route *rt_dest)
1092 {
1093 struct ieee80211com *ic = vap->iv_ic;
1094 struct ieee80211_mesh_state *ms = vap->iv_mesh;
1095 struct ieee80211_mesh_route *rt_gate;
1096 struct ieee80211_mesh_gate_route *gr = NULL, *gr_next;
1097 struct mbuf *m, *mcopy, *next;
1098
1099 IEEE80211_TX_UNLOCK_ASSERT(ic);
1100
1101 KASSERT( rt_dest->rt_flags == IEEE80211_MESHRT_FLAGS_DISCOVER,
1102 ("Route is not marked with IEEE80211_MESHRT_FLAGS_DISCOVER"));
1103
1104 /* XXX: send to more than one valid mash gate */
1105 MESH_RT_LOCK(ms);
1106
1107 m = ieee80211_ageq_remove(&ic->ic_stageq,
1108 (struct ieee80211_node *)(uintptr_t)
1109 ieee80211_mac_hash(ic, rt_dest->rt_dest));
1110
1111 TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, gr_next) {
1112 rt_gate = gr->gr_route;
1113 if (rt_gate == NULL) {
1114 #if defined(__DragonFly__)
1115 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP,
1116 rt_dest->rt_dest,
1117 "mesh gate with no path %s",
1118 ether_sprintf(gr->gr_addr));
1119 #else
1120 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP,
1121 "mesh gate with no path %6D",
1122 gr->gr_addr, ":");
1123 #endif
1124 continue;
1125 }
1126 if ((rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0)
1127 continue;
1128 KASSERT(rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_GATE,
1129 ("route not marked as a mesh gate"));
1130 KASSERT((rt_gate->rt_flags &
1131 IEEE80211_MESHRT_FLAGS_PROXY) == 0,
1132 ("found mesh gate that is also marked porxy"));
1133 /*
1134 * convert route to a proxy route gated by the current
1135 * mesh gate, this is needed so encap can built data
1136 * frame with correct address.
1137 */
1138 rt_dest->rt_flags = IEEE80211_MESHRT_FLAGS_PROXY |
1139 IEEE80211_MESHRT_FLAGS_VALID;
1140 rt_dest->rt_ext_seq = 1; /* random value */
1141 IEEE80211_ADDR_COPY(rt_dest->rt_mesh_gate, rt_gate->rt_dest);
1142 IEEE80211_ADDR_COPY(rt_dest->rt_nexthop, rt_gate->rt_nexthop);
1143 rt_dest->rt_metric = rt_gate->rt_metric;
1144 rt_dest->rt_nhops = rt_gate->rt_nhops;
1145 ieee80211_mesh_rt_update(rt_dest, ms->ms_ppath->mpp_inact);
1146 MESH_RT_UNLOCK(ms);
1147 /* XXX: lock?? */
1148 mcopy = m_dup(m, M_NOWAIT);
1149 for (; mcopy != NULL; mcopy = next) {
1150 next = mcopy->m_nextpkt;
1151 mcopy->m_nextpkt = NULL;
1152 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP,
1153 rt_dest->rt_dest,
1154 "flush queued frame %p len %d", mcopy,
1155 mcopy->m_pkthdr.len);
1156 mesh_transmit_to_gate(vap, mcopy, rt_gate);
1157 }
1158 MESH_RT_LOCK(ms);
1159 }
1160 rt_dest->rt_flags = 0; /* Mark invalid */
1161 m_freem(m);
1162 MESH_RT_UNLOCK(ms);
1163 }
1164
1165 /*
1166 * Forward the specified frame.
1167 * Decrement the TTL and set TA to our MAC address.
1168 */
1169 static void
1170 mesh_forward(struct ieee80211vap *vap, struct mbuf *m,
1171 const struct ieee80211_meshcntl *mc)
1172 {
1173 struct ieee80211com *ic = vap->iv_ic;
1174 struct ieee80211_mesh_state *ms = vap->iv_mesh;
1175 struct ifnet *ifp = vap->iv_ifp;
1176 const struct ieee80211_frame *wh =
1177 mtod(m, const struct ieee80211_frame *);
1178 struct mbuf *mcopy;
1179 struct ieee80211_meshcntl *mccopy;
1180 struct ieee80211_frame *whcopy;
1181 struct ieee80211_node *ni;
1182 int err;
1183
1184 /* This is called from the RX path - don't hold this lock */
1185 IEEE80211_TX_UNLOCK_ASSERT(ic);
1186
1187 /*
1188 * mesh ttl of 1 means we are the last one receiving it,
1189 * according to amendment we decrement and then check if
1190 * 0, if so we dont forward.
1191 */
1192 if (mc->mc_ttl < 1) {
1193 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1194 "%s", "frame not fwd'd, ttl 1");
1195 vap->iv_stats.is_mesh_fwd_ttl++;
1196 return;
1197 }
1198 if (!(ms->ms_flags & IEEE80211_MESHFLAGS_FWD)) {
1199 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1200 "%s", "frame not fwd'd, fwding disabled");
1201 vap->iv_stats.is_mesh_fwd_disabled++;
1202 return;
1203 }
1204 mcopy = m_dup(m, M_NOWAIT);
1205 if (mcopy == NULL) {
1206 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1207 "%s", "frame not fwd'd, cannot dup");
1208 vap->iv_stats.is_mesh_fwd_nobuf++;
1209 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
1210 return;
1211 }
1212 mcopy = m_pullup(mcopy, ieee80211_hdrspace(ic, wh) +
1213 sizeof(struct ieee80211_meshcntl));
1214 if (mcopy == NULL) {
1215 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1216 "%s", "frame not fwd'd, too short");
1217 vap->iv_stats.is_mesh_fwd_tooshort++;
1218 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
1219 m_freem(mcopy);
1220 return;
1221 }
1222 whcopy = mtod(mcopy, struct ieee80211_frame *);
1223 mccopy = (struct ieee80211_meshcntl *)
1224 (mtod(mcopy, uint8_t *) + ieee80211_hdrspace(ic, wh));
1225 /* XXX clear other bits? */
1226 whcopy->i_fc[1] &= ~IEEE80211_FC1_RETRY;
1227 IEEE80211_ADDR_COPY(whcopy->i_addr2, vap->iv_myaddr);
1228 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1229 ni = ieee80211_ref_node(vap->iv_bss);
1230 mcopy->m_flags |= M_MCAST;
1231 } else {
1232 ni = ieee80211_mesh_find_txnode(vap, whcopy->i_addr3);
1233 if (ni == NULL) {
1234 /*
1235 * [Optional] any of the following three actions:
1236 * o silently discard
1237 * o trigger a path discovery
1238 * o inform TA that meshDA is unknown.
1239 */
1240 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1241 "%s", "frame not fwd'd, no path");
1242 ms->ms_ppath->mpp_senderror(vap, whcopy->i_addr3, NULL,
1243 IEEE80211_REASON_MESH_PERR_NO_FI);
1244 vap->iv_stats.is_mesh_fwd_nopath++;
1245 m_freem(mcopy);
1246 return;
1247 }
1248 IEEE80211_ADDR_COPY(whcopy->i_addr1, ni->ni_macaddr);
1249 }
1250 KASSERT(mccopy->mc_ttl > 0, ("%s called with wrong ttl", __func__));
1251 mccopy->mc_ttl--;
1252
1253 /* XXX calculate priority so drivers can find the tx queue */
1254 M_WME_SETAC(mcopy, WME_AC_BE);
1255
1256 /* XXX do we know m_nextpkt is NULL? */
1257 mcopy->m_pkthdr.rcvif = (void *) ni;
1258
1259 /*
1260 * XXX this bypasses all of the VAP TX handling; it passes frames
1261 * directly to the parent interface.
1262 *
1263 * Because of this, there's no TX lock being held as there's no
1264 * encaps state being used.
1265 *
1266 * Doing a direct parent transmit may not be the correct thing
1267 * to do here; we'll have to re-think this soon.
1268 */
1269 IEEE80211_TX_LOCK(ic);
1270 err = ieee80211_parent_xmitpkt(ic, mcopy);
1271 IEEE80211_TX_UNLOCK(ic);
1272 if (!err)
1273 if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1);
1274 }
1275
1276 static struct mbuf *
1277 mesh_decap(struct ieee80211vap *vap, struct mbuf *m, int hdrlen, int meshdrlen)
1278 {
1279 #define WHDIR(wh) ((wh)->i_fc[1] & IEEE80211_FC1_DIR_MASK)
1280 #define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc)
1281 uint8_t b[sizeof(struct ieee80211_qosframe_addr4) +
1282 sizeof(struct ieee80211_meshcntl_ae10)];
1283 const struct ieee80211_qosframe_addr4 *wh;
1284 const struct ieee80211_meshcntl_ae10 *mc;
1285 struct ether_header *eh;
1286 struct llc *llc;
1287 int ae;
1288
1289 if (m->m_len < hdrlen + sizeof(*llc) &&
1290 (m = m_pullup(m, hdrlen + sizeof(*llc))) == NULL) {
1291 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ANY,
1292 "discard data frame: %s", "m_pullup failed");
1293 vap->iv_stats.is_rx_tooshort++;
1294 return NULL;
1295 }
1296 memcpy(b, mtod(m, caddr_t), hdrlen);
1297 wh = (const struct ieee80211_qosframe_addr4 *)&b[0];
1298 mc = (const struct ieee80211_meshcntl_ae10 *)&b[hdrlen - meshdrlen];
1299 KASSERT(WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS ||
1300 WHDIR(wh) == IEEE80211_FC1_DIR_DSTODS,
1301 ("bogus dir, fc 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1]));
1302
1303 llc = (struct llc *)(mtod(m, caddr_t) + hdrlen);
1304 if (llc->llc_dsap == LLC_SNAP_LSAP && llc->llc_ssap == LLC_SNAP_LSAP &&
1305 llc->llc_control == LLC_UI && llc->llc_snap.org_code[0] == 0 &&
1306 llc->llc_snap.org_code[1] == 0 && llc->llc_snap.org_code[2] == 0 &&
1307 /* NB: preserve AppleTalk frames that have a native SNAP hdr */
1308 !(llc->llc_snap.ether_type == htons(ETHERTYPE_AARP) ||
1309 llc->llc_snap.ether_type == htons(ETHERTYPE_IPX))) {
1310 m_adj(m, hdrlen + sizeof(struct llc) - sizeof(*eh));
1311 llc = NULL;
1312 } else {
1313 m_adj(m, hdrlen - sizeof(*eh));
1314 }
1315 eh = mtod(m, struct ether_header *);
1316 ae = mc->mc_flags & IEEE80211_MESH_AE_MASK;
1317 if (WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS) {
1318 IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr1);
1319 if (ae == IEEE80211_MESH_AE_00) {
1320 IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr3);
1321 } else if (ae == IEEE80211_MESH_AE_01) {
1322 IEEE80211_ADDR_COPY(eh->ether_shost,
1323 MC01(mc)->mc_addr4);
1324 } else {
1325 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1326 (const struct ieee80211_frame *)wh, NULL,
1327 "bad AE %d", ae);
1328 vap->iv_stats.is_mesh_badae++;
1329 m_freem(m);
1330 return NULL;
1331 }
1332 } else {
1333 if (ae == IEEE80211_MESH_AE_00) {
1334 IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr3);
1335 IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr4);
1336 } else if (ae == IEEE80211_MESH_AE_10) {
1337 IEEE80211_ADDR_COPY(eh->ether_dhost, mc->mc_addr5);
1338 IEEE80211_ADDR_COPY(eh->ether_shost, mc->mc_addr6);
1339 } else {
1340 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1341 (const struct ieee80211_frame *)wh, NULL,
1342 "bad AE %d", ae);
1343 vap->iv_stats.is_mesh_badae++;
1344 m_freem(m);
1345 return NULL;
1346 }
1347 }
1348 #ifndef __NO_STRICT_ALIGNMENT
1349 if (!ALIGNED_POINTER(mtod(m, caddr_t) + sizeof(*eh), uint32_t)) {
1350 m = ieee80211_realign(vap, m, sizeof(*eh));
1351 if (m == NULL)
1352 return NULL;
1353 }
1354 #endif /* !__NO_STRICT_ALIGNMENT */
1355 if (llc != NULL) {
1356 eh = mtod(m, struct ether_header *);
1357 eh->ether_type = htons(m->m_pkthdr.len - sizeof(*eh));
1358 }
1359 return m;
1360 #undef WDIR
1361 #undef MC01
1362 }
1363
1364 /*
1365 * Return non-zero if the unicast mesh data frame should be processed
1366 * locally. Frames that are not proxy'd have our address, otherwise
1367 * we need to consult the routing table to look for a proxy entry.
1368 */
1369 static __inline int
1370 mesh_isucastforme(struct ieee80211vap *vap, const struct ieee80211_frame *wh,
1371 const struct ieee80211_meshcntl *mc)
1372 {
1373 int ae = mc->mc_flags & 3;
1374
1375 KASSERT((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) == IEEE80211_FC1_DIR_DSTODS,
1376 ("bad dir 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1]));
1377 KASSERT(ae == IEEE80211_MESH_AE_00 || ae == IEEE80211_MESH_AE_10,
1378 ("bad AE %d", ae));
1379 if (ae == IEEE80211_MESH_AE_10) { /* ucast w/ proxy */
1380 const struct ieee80211_meshcntl_ae10 *mc10 =
1381 (const struct ieee80211_meshcntl_ae10 *) mc;
1382 struct ieee80211_mesh_route *rt =
1383 ieee80211_mesh_rt_find(vap, mc10->mc_addr5);
1384 /* check for proxy route to ourself */
1385 return (rt != NULL &&
1386 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY));
1387 } else /* ucast w/o proxy */
1388 return IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_myaddr);
1389 }
1390
1391 /*
1392 * Verifies transmitter, updates lifetime, precursor list and forwards data.
1393 * > 0 means we have forwarded data and no need to process locally
1394 * == 0 means we want to process locally (and we may have forwarded data
1395 * < 0 means there was an error and data should be discarded
1396 */
1397 static int
1398 mesh_recv_indiv_data_to_fwrd(struct ieee80211vap *vap, struct mbuf *m,
1399 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc)
1400 {
1401 struct ieee80211_qosframe_addr4 *qwh;
1402 struct ieee80211_mesh_state *ms = vap->iv_mesh;
1403 struct ieee80211_mesh_route *rt_meshda, *rt_meshsa;
1404
1405 /* This is called from the RX path - don't hold this lock */
1406 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
1407
1408 qwh = (struct ieee80211_qosframe_addr4 *)wh;
1409
1410 /*
1411 * TODO:
1412 * o verify addr2 is a legitimate transmitter
1413 * o lifetime of precursor of addr3 (addr2) is max(init, curr)
1414 * o lifetime of precursor of addr4 (nexthop) is max(init, curr)
1415 */
1416
1417 /* set lifetime of addr3 (meshDA) to initial value */
1418 rt_meshda = ieee80211_mesh_rt_find(vap, qwh->i_addr3);
1419 if (rt_meshda == NULL) {
1420 #if defined(__DragonFly__)
1421 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, qwh->i_addr2,
1422 "no route to meshDA(%s)", ether_sprintf(qwh->i_addr3));
1423 #else
1424 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, qwh->i_addr2,
1425 "no route to meshDA(%6D)", qwh->i_addr3, ":");
1426 #endif
1427 /*
1428 * [Optional] any of the following three actions:
1429 * o silently discard [X]
1430 * o trigger a path discovery [ ]
1431 * o inform TA that meshDA is unknown. [ ]
1432 */
1433 /* XXX: stats */
1434 return (-1);
1435 }
1436
1437 ieee80211_mesh_rt_update(rt_meshda, ticks_to_msecs(
1438 ms->ms_ppath->mpp_inact));
1439
1440 /* set lifetime of addr4 (meshSA) to initial value */
1441 rt_meshsa = ieee80211_mesh_rt_find(vap, qwh->i_addr4);
1442 KASSERT(rt_meshsa != NULL, ("no route"));
1443 ieee80211_mesh_rt_update(rt_meshsa, ticks_to_msecs(
1444 ms->ms_ppath->mpp_inact));
1445
1446 mesh_forward(vap, m, mc);
1447 return (1); /* dont process locally */
1448 }
1449
1450 /*
1451 * Verifies transmitter, updates lifetime, precursor list and process data
1452 * locally, if data is proxy with AE = 10 it could mean data should go
1453 * on another mesh path or data should be forwarded to the DS.
1454 *
1455 * > 0 means we have forwarded data and no need to process locally
1456 * == 0 means we want to process locally (and we may have forwarded data
1457 * < 0 means there was an error and data should be discarded
1458 */
1459 static int
1460 mesh_recv_indiv_data_to_me(struct ieee80211vap *vap, struct mbuf *m,
1461 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc)
1462 {
1463 struct ieee80211_qosframe_addr4 *qwh;
1464 const struct ieee80211_meshcntl_ae10 *mc10;
1465 struct ieee80211_mesh_state *ms = vap->iv_mesh;
1466 struct ieee80211_mesh_route *rt;
1467 int ae;
1468
1469 /* This is called from the RX path - don't hold this lock */
1470 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
1471
1472 qwh = (struct ieee80211_qosframe_addr4 *)wh;
1473 mc10 = (const struct ieee80211_meshcntl_ae10 *)mc;
1474
1475 /*
1476 * TODO:
1477 * o verify addr2 is a legitimate transmitter
1478 * o lifetime of precursor entry is max(init, curr)
1479 */
1480
1481 /* set lifetime of addr4 (meshSA) to initial value */
1482 rt = ieee80211_mesh_rt_find(vap, qwh->i_addr4);
1483 KASSERT(rt != NULL, ("no route"));
1484 ieee80211_mesh_rt_update(rt, ticks_to_msecs(ms->ms_ppath->mpp_inact));
1485 rt = NULL;
1486
1487 ae = mc10->mc_flags & IEEE80211_MESH_AE_MASK;
1488 KASSERT(ae == IEEE80211_MESH_AE_00 ||
1489 ae == IEEE80211_MESH_AE_10, ("bad AE %d", ae));
1490 if (ae == IEEE80211_MESH_AE_10) {
1491 if (IEEE80211_ADDR_EQ(mc10->mc_addr5, qwh->i_addr3)) {
1492 return (0); /* process locally */
1493 }
1494
1495 rt = ieee80211_mesh_rt_find(vap, mc10->mc_addr5);
1496 if (rt != NULL &&
1497 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) &&
1498 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) == 0) {
1499 /*
1500 * Forward on another mesh-path, according to
1501 * amendment as specified in 9.32.4.1
1502 */
1503 IEEE80211_ADDR_COPY(qwh->i_addr3, mc10->mc_addr5);
1504 mesh_forward(vap, m,
1505 (const struct ieee80211_meshcntl *)mc10);
1506 return (1); /* dont process locally */
1507 }
1508 /*
1509 * All other cases: forward of MSDUs from the MBSS to DS indiv.
1510 * addressed according to 13.11.3.2.
1511 */
1512 #if defined(__DragonFly__)
1513 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, qwh->i_addr2,
1514 "forward frame to DS, SA(%s) DA(%s)",
1515 ether_sprintf(mc10->mc_addr6),
1516 ether_sprintf(mc10->mc_addr5));
1517 #else
1518 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, qwh->i_addr2,
1519 "forward frame to DS, SA(%6D) DA(%6D)",
1520 mc10->mc_addr6, ":", mc10->mc_addr5, ":");
1521 #endif
1522 }
1523 return (0); /* process locally */
1524 }
1525
1526 /*
1527 * Try to forward the group addressed data on to other mesh STAs, and
1528 * also to the DS.
1529 *
1530 * > 0 means we have forwarded data and no need to process locally
1531 * == 0 means we want to process locally (and we may have forwarded data
1532 * < 0 means there was an error and data should be discarded
1533 */
1534 static int
1535 mesh_recv_group_data(struct ieee80211vap *vap, struct mbuf *m,
1536 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc)
1537 {
1538 #define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc)
1539 struct ieee80211_mesh_state *ms = vap->iv_mesh;
1540
1541 /* This is called from the RX path - don't hold this lock */
1542 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
1543
1544 mesh_forward(vap, m, mc);
1545
1546 if(mc->mc_ttl > 0) {
1547 if (mc->mc_flags & IEEE80211_MESH_AE_01) {
1548 /*
1549 * Forward of MSDUs from the MBSS to DS group addressed
1550 * (according to 13.11.3.2)
1551 * This happens by delivering the packet, and a bridge
1552 * will sent it on another port member.
1553 */
1554 if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE &&
1555 ms->ms_flags & IEEE80211_MESHFLAGS_FWD)
1556 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH,
1557 MC01(mc)->mc_addr4, "%s",
1558 "forward from MBSS to the DS");
1559 }
1560 }
1561 return (0); /* process locally */
1562 #undef MC01
1563 }
1564
1565 static int
1566 mesh_input(struct ieee80211_node *ni, struct mbuf *m,
1567 const struct ieee80211_rx_stats *rxs, int rssi, int nf)
1568 {
1569 #define HAS_SEQ(type) ((type & 0x4) == 0)
1570 #define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc)
1571 #define MC10(mc) ((const struct ieee80211_meshcntl_ae10 *)mc)
1572 struct ieee80211vap *vap = ni->ni_vap;
1573 struct ieee80211com *ic = ni->ni_ic;
1574 struct ifnet *ifp = vap->iv_ifp;
1575 struct ieee80211_frame *wh;
1576 const struct ieee80211_meshcntl *mc;
1577 int hdrspace, meshdrlen, need_tap, error;
1578 uint8_t dir, type, subtype, ae;
1579 uint32_t seq;
1580 const uint8_t *addr;
1581 uint8_t qos[2];
1582
1583 KASSERT(ni != NULL, ("null node"));
1584 ni->ni_inact = ni->ni_inact_reload;
1585
1586 need_tap = 1; /* mbuf need to be tapped. */
1587 type = -1; /* undefined */
1588
1589 /* This is called from the RX path - don't hold this lock */
1590 IEEE80211_TX_UNLOCK_ASSERT(ic);
1591
1592 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) {
1593 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1594 ni->ni_macaddr, NULL,
1595 "too short (1): len %u", m->m_pkthdr.len);
1596 vap->iv_stats.is_rx_tooshort++;
1597 goto out;
1598 }
1599 /*
1600 * Bit of a cheat here, we use a pointer for a 3-address
1601 * frame format but don't reference fields past outside
1602 * ieee80211_frame_min w/o first validating the data is
1603 * present.
1604 */
1605 wh = mtod(m, struct ieee80211_frame *);
1606
1607 if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) !=
1608 IEEE80211_FC0_VERSION_0) {
1609 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1610 ni->ni_macaddr, NULL, "wrong version %x", wh->i_fc[0]);
1611 vap->iv_stats.is_rx_badversion++;
1612 goto err;
1613 }
1614 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK;
1615 type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK;
1616 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK;
1617 if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) {
1618 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi);
1619 ni->ni_noise = nf;
1620 if (HAS_SEQ(type)) {
1621 uint8_t tid = ieee80211_gettid(wh);
1622
1623 if (IEEE80211_QOS_HAS_SEQ(wh) &&
1624 TID_TO_WME_AC(tid) >= WME_AC_VI)
1625 ic->ic_wme.wme_hipri_traffic++;
1626 if (! ieee80211_check_rxseq(ni, wh, wh->i_addr1))
1627 goto out;
1628 }
1629 }
1630 #ifdef IEEE80211_DEBUG
1631 /*
1632 * It's easier, but too expensive, to simulate different mesh
1633 * topologies by consulting the ACL policy very early, so do this
1634 * only under DEBUG.
1635 *
1636 * NB: this check is also done upon peering link initiation.
1637 */
1638 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) {
1639 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL,
1640 wh, NULL, "%s", "disallowed by ACL");
1641 vap->iv_stats.is_rx_acl++;
1642 goto out;
1643 }
1644 #endif
1645 switch (type) {
1646 case IEEE80211_FC0_TYPE_DATA:
1647 if (ni == vap->iv_bss)
1648 goto out;
1649 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) {
1650 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
1651 ni->ni_macaddr, NULL,
1652 "peer link not yet established (%d)",
1653 ni->ni_mlstate);
1654 vap->iv_stats.is_mesh_nolink++;
1655 goto out;
1656 }
1657 if (dir != IEEE80211_FC1_DIR_FROMDS &&
1658 dir != IEEE80211_FC1_DIR_DSTODS) {
1659 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1660 wh, "data", "incorrect dir 0x%x", dir);
1661 vap->iv_stats.is_rx_wrongdir++;
1662 goto err;
1663 }
1664
1665 /* All Mesh data frames are QoS subtype */
1666 if (!HAS_SEQ(type)) {
1667 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1668 wh, "data", "incorrect subtype 0x%x", subtype);
1669 vap->iv_stats.is_rx_badsubtype++;
1670 goto err;
1671 }
1672
1673 /*
1674 * Next up, any fragmentation.
1675 * XXX: we defrag before we even try to forward,
1676 * Mesh Control field is not present in sub-sequent
1677 * fragmented frames. This is in contrast to Draft 4.0.
1678 */
1679 hdrspace = ieee80211_hdrspace(ic, wh);
1680 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1681 m = ieee80211_defrag(ni, m, hdrspace);
1682 if (m == NULL) {
1683 /* Fragment dropped or frame not complete yet */
1684 goto out;
1685 }
1686 }
1687 wh = mtod(m, struct ieee80211_frame *); /* NB: after defrag */
1688
1689 /*
1690 * Now we have a complete Mesh Data frame.
1691 */
1692
1693 /*
1694 * Only fromDStoDS data frames use 4 address qos frames
1695 * as specified in amendment. Otherwise addr4 is located
1696 * in the Mesh Control field and a 3 address qos frame
1697 * is used.
1698 */
1699 if (IEEE80211_IS_DSTODS(wh))
1700 *(uint16_t *)qos = *(uint16_t *)
1701 ((struct ieee80211_qosframe_addr4 *)wh)->i_qos;
1702 else
1703 *(uint16_t *)qos = *(uint16_t *)
1704 ((struct ieee80211_qosframe *)wh)->i_qos;
1705
1706 /*
1707 * NB: The mesh STA sets the Mesh Control Present
1708 * subfield to 1 in the Mesh Data frame containing
1709 * an unfragmented MSDU, an A-MSDU, or the first
1710 * fragment of an MSDU.
1711 * After defrag it should always be present.
1712 */
1713 if (!(qos[1] & IEEE80211_QOS_MC)) {
1714 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
1715 ni->ni_macaddr, NULL,
1716 "%s", "Mesh control field not present");
1717 vap->iv_stats.is_rx_elem_missing++; /* XXX: kinda */
1718 goto err;
1719 }
1720
1721 /* pull up enough to get to the mesh control */
1722 if (m->m_len < hdrspace + sizeof(struct ieee80211_meshcntl) &&
1723 (m = m_pullup(m, hdrspace +
1724 sizeof(struct ieee80211_meshcntl))) == NULL) {
1725 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1726 ni->ni_macaddr, NULL,
1727 "data too short: expecting %u", hdrspace);
1728 vap->iv_stats.is_rx_tooshort++;
1729 goto out; /* XXX */
1730 }
1731 /*
1732 * Now calculate the full extent of the headers. Note
1733 * mesh_decap will pull up anything we didn't get
1734 * above when it strips the 802.11 headers.
1735 */
1736 mc = (const struct ieee80211_meshcntl *)
1737 (mtod(m, const uint8_t *) + hdrspace);
1738 ae = mc->mc_flags & IEEE80211_MESH_AE_MASK;
1739 meshdrlen = sizeof(struct ieee80211_meshcntl) +
1740 ae * IEEE80211_ADDR_LEN;
1741 hdrspace += meshdrlen;
1742
1743 /* pull complete hdrspace = ieee80211_hdrspace + meshcontrol */
1744 if ((meshdrlen > sizeof(struct ieee80211_meshcntl)) &&
1745 (m->m_len < hdrspace) &&
1746 ((m = m_pullup(m, hdrspace)) == NULL)) {
1747 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1748 ni->ni_macaddr, NULL,
1749 "data too short: expecting %u", hdrspace);
1750 vap->iv_stats.is_rx_tooshort++;
1751 goto out; /* XXX */
1752 }
1753 /* XXX: are we sure there is no reallocating after m_pullup? */
1754
1755 seq = le32dec(mc->mc_seq);
1756 if (IEEE80211_IS_MULTICAST(wh->i_addr1))
1757 addr = wh->i_addr3;
1758 else if (ae == IEEE80211_MESH_AE_01)
1759 addr = MC01(mc)->mc_addr4;
1760 else
1761 addr = ((struct ieee80211_qosframe_addr4 *)wh)->i_addr4;
1762 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, addr)) {
1763 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
1764 addr, "data", "%s", "not to me");
1765 vap->iv_stats.is_rx_wrongbss++; /* XXX kinda */
1766 goto out;
1767 }
1768 if (mesh_checkpseq(vap, addr, seq) != 0) {
1769 vap->iv_stats.is_rx_dup++;
1770 goto out;
1771 }
1772
1773 /* This code "routes" the frame to the right control path */
1774 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1775 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr3))
1776 error =
1777 mesh_recv_indiv_data_to_me(vap, m, wh, mc);
1778 else if (IEEE80211_IS_MULTICAST(wh->i_addr3))
1779 error = mesh_recv_group_data(vap, m, wh, mc);
1780 else
1781 error = mesh_recv_indiv_data_to_fwrd(vap, m,
1782 wh, mc);
1783 } else
1784 error = mesh_recv_group_data(vap, m, wh, mc);
1785 if (error < 0)
1786 goto err;
1787 else if (error > 0)
1788 goto out;
1789
1790 if (ieee80211_radiotap_active_vap(vap))
1791 ieee80211_radiotap_rx(vap, m);
1792 need_tap = 0;
1793
1794 /*
1795 * Finally, strip the 802.11 header.
1796 */
1797 m = mesh_decap(vap, m, hdrspace, meshdrlen);
1798 if (m == NULL) {
1799 /* XXX mask bit to check for both */
1800 /* don't count Null data frames as errors */
1801 if (subtype == IEEE80211_FC0_SUBTYPE_NODATA ||
1802 subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL)
1803 goto out;
1804 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
1805 ni->ni_macaddr, "data", "%s", "decap error");
1806 vap->iv_stats.is_rx_decap++;
1807 IEEE80211_NODE_STAT(ni, rx_decap);
1808 goto err;
1809 }
1810 if (qos[0] & IEEE80211_QOS_AMSDU) {
1811 m = ieee80211_decap_amsdu(ni, m);
1812 if (m == NULL)
1813 return IEEE80211_FC0_TYPE_DATA;
1814 }
1815 ieee80211_deliver_data(vap, ni, m);
1816 return type;
1817 case IEEE80211_FC0_TYPE_MGT:
1818 vap->iv_stats.is_rx_mgmt++;
1819 IEEE80211_NODE_STAT(ni, rx_mgmt);
1820 if (dir != IEEE80211_FC1_DIR_NODS) {
1821 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1822 wh, "mgt", "incorrect dir 0x%x", dir);
1823 vap->iv_stats.is_rx_wrongdir++;
1824 goto err;
1825 }
1826 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) {
1827 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1828 ni->ni_macaddr, "mgt", "too short: len %u",
1829 m->m_pkthdr.len);
1830 vap->iv_stats.is_rx_tooshort++;
1831 goto out;
1832 }
1833 #ifdef IEEE80211_DEBUG
1834 if ((ieee80211_msg_debug(vap) &&
1835 (vap->iv_ic->ic_flags & IEEE80211_F_SCAN)) ||
1836 ieee80211_msg_dumppkts(vap)) {
1837 if_printf(ifp, "received %s from %s rssi %d\n",
1838 ieee80211_mgt_subtype_name(subtype),
1839 ether_sprintf(wh->i_addr2), rssi);
1840 }
1841 #endif
1842 if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) {
1843 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1844 wh, NULL, "%s", "WEP set but not permitted");
1845 vap->iv_stats.is_rx_mgtdiscard++; /* XXX */
1846 goto out;
1847 }
1848 vap->iv_recv_mgmt(ni, m, subtype, rxs, rssi, nf);
1849 goto out;
1850 case IEEE80211_FC0_TYPE_CTL:
1851 vap->iv_stats.is_rx_ctl++;
1852 IEEE80211_NODE_STAT(ni, rx_ctrl);
1853 goto out;
1854 default:
1855 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1856 wh, "bad", "frame type 0x%x", type);
1857 /* should not come here */
1858 break;
1859 }
1860 err:
1861 if_inc_counter(ifp, IFCOUNTER_IERRORS, 1);
1862 out:
1863 if (m != NULL) {
1864 if (need_tap && ieee80211_radiotap_active_vap(vap))
1865 ieee80211_radiotap_rx(vap, m);
1866 m_freem(m);
1867 }
1868 return type;
1869 #undef HAS_SEQ
1870 #undef MC01
1871 #undef MC10
1872 }
1873
1874 static void
1875 mesh_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, int subtype,
1876 const struct ieee80211_rx_stats *rxs, int rssi, int nf)
1877 {
1878 struct ieee80211vap *vap = ni->ni_vap;
1879 struct ieee80211_mesh_state *ms = vap->iv_mesh;
1880 struct ieee80211com *ic = ni->ni_ic;
1881 struct ieee80211_channel *rxchan = ic->ic_curchan;
1882 struct ieee80211_frame *wh;
1883 struct ieee80211_mesh_route *rt;
1884 uint8_t *frm, *efrm;
1885
1886 wh = mtod(m0, struct ieee80211_frame *);
1887 frm = (uint8_t *)&wh[1];
1888 efrm = mtod(m0, uint8_t *) + m0->m_len;
1889 switch (subtype) {
1890 case IEEE80211_FC0_SUBTYPE_PROBE_RESP:
1891 case IEEE80211_FC0_SUBTYPE_BEACON:
1892 {
1893 struct ieee80211_scanparams scan;
1894 struct ieee80211_channel *c;
1895 /*
1896 * We process beacon/probe response
1897 * frames to discover neighbors.
1898 */
1899 if (rxs != NULL) {
1900 c = ieee80211_lookup_channel_rxstatus(vap, rxs);
1901 if (c != NULL)
1902 rxchan = c;
1903 }
1904 if (ieee80211_parse_beacon(ni, m0, rxchan, &scan) != 0)
1905 return;
1906 /*
1907 * Count frame now that we know it's to be processed.
1908 */
1909 if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) {
1910 vap->iv_stats.is_rx_beacon++; /* XXX remove */
1911 IEEE80211_NODE_STAT(ni, rx_beacons);
1912 } else
1913 IEEE80211_NODE_STAT(ni, rx_proberesp);
1914 /*
1915 * If scanning, just pass information to the scan module.
1916 */
1917 if (ic->ic_flags & IEEE80211_F_SCAN) {
1918 if (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN) {
1919 /*
1920 * Actively scanning a channel marked passive;
1921 * send a probe request now that we know there
1922 * is 802.11 traffic present.
1923 *
1924 * XXX check if the beacon we recv'd gives
1925 * us what we need and suppress the probe req
1926 */
1927 ieee80211_probe_curchan(vap, 1);
1928 ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN;
1929 }
1930 ieee80211_add_scan(vap, rxchan, &scan, wh,
1931 subtype, rssi, nf);
1932 return;
1933 }
1934
1935 /* The rest of this code assumes we are running */
1936 if (vap->iv_state != IEEE80211_S_RUN)
1937 return;
1938 /*
1939 * Ignore non-mesh STAs.
1940 */
1941 if ((scan.capinfo &
1942 (IEEE80211_CAPINFO_ESS|IEEE80211_CAPINFO_IBSS)) ||
1943 scan.meshid == NULL || scan.meshconf == NULL) {
1944 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1945 wh, "beacon", "%s", "not a mesh sta");
1946 vap->iv_stats.is_mesh_wrongmesh++;
1947 return;
1948 }
1949 /*
1950 * Ignore STAs for other mesh networks.
1951 */
1952 if (memcmp(scan.meshid+2, ms->ms_id, ms->ms_idlen) != 0 ||
1953 mesh_verify_meshconf(vap, scan.meshconf)) {
1954 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1955 wh, "beacon", "%s", "not for our mesh");
1956 vap->iv_stats.is_mesh_wrongmesh++;
1957 return;
1958 }
1959 /*
1960 * Peer only based on the current ACL policy.
1961 */
1962 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) {
1963 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL,
1964 wh, NULL, "%s", "disallowed by ACL");
1965 vap->iv_stats.is_rx_acl++;
1966 return;
1967 }
1968 /*
1969 * Do neighbor discovery.
1970 */
1971 if (!IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_macaddr)) {
1972 /*
1973 * Create a new entry in the neighbor table.
1974 */
1975 ni = ieee80211_add_neighbor(vap, wh, &scan);
1976 }
1977 /*
1978 * Automatically peer with discovered nodes if possible.
1979 */
1980 if (ni != vap->iv_bss &&
1981 (ms->ms_flags & IEEE80211_MESHFLAGS_AP)) {
1982 switch (ni->ni_mlstate) {
1983 case IEEE80211_NODE_MESH_IDLE:
1984 {
1985 uint16_t args[1];
1986
1987 /* Wait for backoff callout to reset counter */
1988 if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding)
1989 return;
1990
1991 ni->ni_mlpid = mesh_generateid(vap);
1992 if (ni->ni_mlpid == 0)
1993 return;
1994 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENSNT);
1995 args[0] = ni->ni_mlpid;
1996 ieee80211_send_action(ni,
1997 IEEE80211_ACTION_CAT_SELF_PROT,
1998 IEEE80211_ACTION_MESHPEERING_OPEN, args);
1999 ni->ni_mlrcnt = 0;
2000 mesh_peer_timeout_setup(ni);
2001 break;
2002 }
2003 case IEEE80211_NODE_MESH_ESTABLISHED:
2004 {
2005 /*
2006 * Valid beacon from a peer mesh STA
2007 * bump TA lifetime
2008 */
2009 rt = ieee80211_mesh_rt_find(vap, wh->i_addr2);
2010 if(rt != NULL) {
2011 ieee80211_mesh_rt_update(rt,
2012 ticks_to_msecs(
2013 ms->ms_ppath->mpp_inact));
2014 }
2015 break;
2016 }
2017 default:
2018 break; /* ignore */
2019 }
2020 }
2021 break;
2022 }
2023 case IEEE80211_FC0_SUBTYPE_PROBE_REQ:
2024 {
2025 uint8_t *ssid, *meshid, *rates, *xrates;
2026 uint8_t *sfrm;
2027
2028 if (vap->iv_state != IEEE80211_S_RUN) {
2029 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2030 wh, NULL, "wrong state %s",
2031 ieee80211_state_name[vap->iv_state]);
2032 vap->iv_stats.is_rx_mgtdiscard++;
2033 return;
2034 }
2035 if (IEEE80211_IS_MULTICAST(wh->i_addr2)) {
2036 /* frame must be directed */
2037 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2038 wh, NULL, "%s", "not unicast");
2039 vap->iv_stats.is_rx_mgtdiscard++; /* XXX stat */
2040 return;
2041 }
2042 /*
2043 * prreq frame format
2044 * [tlv] ssid
2045 * [tlv] supported rates
2046 * [tlv] extended supported rates
2047 * [tlv] mesh id
2048 */
2049 ssid = meshid = rates = xrates = NULL;
2050 sfrm = frm;
2051 while (efrm - frm > 1) {
2052 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return);
2053 switch (*frm) {
2054 case IEEE80211_ELEMID_SSID:
2055 ssid = frm;
2056 break;
2057 case IEEE80211_ELEMID_RATES:
2058 rates = frm;
2059 break;
2060 case IEEE80211_ELEMID_XRATES:
2061 xrates = frm;
2062 break;
2063 case IEEE80211_ELEMID_MESHID:
2064 meshid = frm;
2065 break;
2066 }
2067 frm += frm[1] + 2;
2068 }
2069 IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return);
2070 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return);
2071 if (xrates != NULL)
2072 IEEE80211_VERIFY_ELEMENT(xrates,
2073 IEEE80211_RATE_MAXSIZE - rates[1], return);
2074 if (meshid != NULL) {
2075 IEEE80211_VERIFY_ELEMENT(meshid,
2076 IEEE80211_MESHID_LEN, return);
2077 /* NB: meshid, not ssid */
2078 IEEE80211_VERIFY_SSID(vap->iv_bss, meshid, return);
2079 }
2080
2081 /* XXX find a better class or define it's own */
2082 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_INPUT, wh->i_addr2,
2083 "%s", "recv probe req");
2084 /*
2085 * Some legacy 11b clients cannot hack a complete
2086 * probe response frame. When the request includes
2087 * only a bare-bones rate set, communicate this to
2088 * the transmit side.
2089 */
2090 ieee80211_send_proberesp(vap, wh->i_addr2, 0);
2091 break;
2092 }
2093
2094 case IEEE80211_FC0_SUBTYPE_ACTION:
2095 case IEEE80211_FC0_SUBTYPE_ACTION_NOACK:
2096 if (ni == vap->iv_bss) {
2097 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2098 wh, NULL, "%s", "unknown node");
2099 vap->iv_stats.is_rx_mgtdiscard++;
2100 } else if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) &&
2101 !IEEE80211_IS_MULTICAST(wh->i_addr1)) {
2102 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2103 wh, NULL, "%s", "not for us");
2104 vap->iv_stats.is_rx_mgtdiscard++;
2105 } else if (vap->iv_state != IEEE80211_S_RUN) {
2106 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2107 wh, NULL, "wrong state %s",
2108 ieee80211_state_name[vap->iv_state]);
2109 vap->iv_stats.is_rx_mgtdiscard++;
2110 } else {
2111 if (ieee80211_parse_action(ni, m0) == 0)
2112 (void)ic->ic_recv_action(ni, wh, frm, efrm);
2113 }
2114 break;
2115
2116 case IEEE80211_FC0_SUBTYPE_ASSOC_REQ:
2117 case IEEE80211_FC0_SUBTYPE_ASSOC_RESP:
2118 case IEEE80211_FC0_SUBTYPE_REASSOC_REQ:
2119 case IEEE80211_FC0_SUBTYPE_REASSOC_RESP:
2120 case IEEE80211_FC0_SUBTYPE_TIMING_ADV:
2121 case IEEE80211_FC0_SUBTYPE_ATIM:
2122 case IEEE80211_FC0_SUBTYPE_DISASSOC:
2123 case IEEE80211_FC0_SUBTYPE_AUTH:
2124 case IEEE80211_FC0_SUBTYPE_DEAUTH:
2125 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2126 wh, NULL, "%s", "not handled");
2127 vap->iv_stats.is_rx_mgtdiscard++;
2128 break;
2129
2130 default:
2131 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
2132 wh, "mgt", "subtype 0x%x not handled", subtype);
2133 vap->iv_stats.is_rx_badsubtype++;
2134 break;
2135 }
2136 }
2137
2138 static void
2139 mesh_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype)
2140 {
2141
2142 switch (subtype) {
2143 case IEEE80211_FC0_SUBTYPE_BAR:
2144 ieee80211_recv_bar(ni, m);
2145 break;
2146 }
2147 }
2148
2149 /*
2150 * Parse meshpeering action ie's for MPM frames
2151 */
2152 static const struct ieee80211_meshpeer_ie *
2153 mesh_parse_meshpeering_action(struct ieee80211_node *ni,
2154 const struct ieee80211_frame *wh, /* XXX for VERIFY_LENGTH */
2155 const uint8_t *frm, const uint8_t *efrm,
2156 struct ieee80211_meshpeer_ie *mp, uint8_t subtype)
2157 {
2158 struct ieee80211vap *vap = ni->ni_vap;
2159 const struct ieee80211_meshpeer_ie *mpie;
2160 uint16_t args[3];
2161 const uint8_t *meshid, *meshconf, *meshpeer;
2162 uint8_t sendclose = 0; /* 1 = MPM frame rejected, close will be sent */
2163
2164 meshid = meshconf = meshpeer = NULL;
2165 while (efrm - frm > 1) {
2166 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return NULL);
2167 switch (*frm) {
2168 case IEEE80211_ELEMID_MESHID:
2169 meshid = frm;
2170 break;
2171 case IEEE80211_ELEMID_MESHCONF:
2172 meshconf = frm;
2173 break;
2174 case IEEE80211_ELEMID_MESHPEER:
2175 meshpeer = frm;
2176 mpie = (const struct ieee80211_meshpeer_ie *) frm;
2177 memset(mp, 0, sizeof(*mp));
2178 mp->peer_len = mpie->peer_len;
2179 mp->peer_proto = le16dec(&mpie->peer_proto);
2180 mp->peer_llinkid = le16dec(&mpie->peer_llinkid);
2181 switch (subtype) {
2182 case IEEE80211_ACTION_MESHPEERING_CONFIRM:
2183 mp->peer_linkid =
2184 le16dec(&mpie->peer_linkid);
2185 break;
2186 case IEEE80211_ACTION_MESHPEERING_CLOSE:
2187 /* NB: peer link ID is optional */
2188 if (mpie->peer_len ==
2189 (IEEE80211_MPM_BASE_SZ + 2)) {
2190 mp->peer_linkid = 0;
2191 mp->peer_rcode =
2192 le16dec(&mpie->peer_linkid);
2193 } else {
2194 mp->peer_linkid =
2195 le16dec(&mpie->peer_linkid);
2196 mp->peer_rcode =
2197 le16dec(&mpie->peer_rcode);
2198 }
2199 break;
2200 }
2201 break;
2202 }
2203 frm += frm[1] + 2;
2204 }
2205
2206 /*
2207 * Verify the contents of the frame.
2208 * If it fails validation, close the peer link.
2209 */
2210 if (mesh_verify_meshpeer(vap, subtype, (const uint8_t *)mp)) {
2211 sendclose = 1;
2212 IEEE80211_DISCARD(vap,
2213 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2214 wh, NULL, "%s", "MPM validation failed");
2215 }
2216
2217 /* If meshid is not the same reject any frames type. */
2218 if (sendclose == 0 && mesh_verify_meshid(vap, meshid)) {
2219 sendclose = 1;
2220 IEEE80211_DISCARD(vap,
2221 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2222 wh, NULL, "%s", "not for our mesh");
2223 if (subtype == IEEE80211_ACTION_MESHPEERING_CLOSE) {
2224 /*
2225 * Standard not clear about this, if we dont ignore
2226 * there will be an endless loop between nodes sending
2227 * CLOSE frames between each other with wrong meshid.
2228 * Discard and timers will bring FSM to IDLE state.
2229 */
2230 return NULL;
2231 }
2232 }
2233
2234 /*
2235 * Close frames are accepted if meshid is the same.
2236 * Verify the other two types.
2237 */
2238 if (sendclose == 0 && subtype != IEEE80211_ACTION_MESHPEERING_CLOSE &&
2239 mesh_verify_meshconf(vap, meshconf)) {
2240 sendclose = 1;
2241 IEEE80211_DISCARD(vap,
2242 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2243 wh, NULL, "%s", "configuration missmatch");
2244 }
2245
2246 if (sendclose) {
2247 vap->iv_stats.is_rx_mgtdiscard++;
2248 switch (ni->ni_mlstate) {
2249 case IEEE80211_NODE_MESH_IDLE:
2250 case IEEE80211_NODE_MESH_ESTABLISHED:
2251 case IEEE80211_NODE_MESH_HOLDING:
2252 /* ignore */
2253 break;
2254 case IEEE80211_NODE_MESH_OPENSNT:
2255 case IEEE80211_NODE_MESH_OPENRCV:
2256 case IEEE80211_NODE_MESH_CONFIRMRCV:
2257 args[0] = ni->ni_mlpid;
2258 args[1] = ni->ni_mllid;
2259 /* Reason codes for rejection */
2260 switch (subtype) {
2261 case IEEE80211_ACTION_MESHPEERING_OPEN:
2262 args[2] = IEEE80211_REASON_MESH_CPVIOLATION;
2263 break;
2264 case IEEE80211_ACTION_MESHPEERING_CONFIRM:
2265 args[2] = IEEE80211_REASON_MESH_INCONS_PARAMS;
2266 break;
2267 }
2268 ieee80211_send_action(ni,
2269 IEEE80211_ACTION_CAT_SELF_PROT,
2270 IEEE80211_ACTION_MESHPEERING_CLOSE,
2271 args);
2272 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2273 mesh_peer_timeout_setup(ni);
2274 break;
2275 }
2276 return NULL;
2277 }
2278
2279 return (const struct ieee80211_meshpeer_ie *) mp;
2280 }
2281
2282 static int
2283 mesh_recv_action_meshpeering_open(struct ieee80211_node *ni,
2284 const struct ieee80211_frame *wh,
2285 const uint8_t *frm, const uint8_t *efrm)
2286 {
2287 struct ieee80211vap *vap = ni->ni_vap;
2288 struct ieee80211_mesh_state *ms = vap->iv_mesh;
2289 struct ieee80211_meshpeer_ie ie;
2290 const struct ieee80211_meshpeer_ie *meshpeer;
2291 uint16_t args[3];
2292
2293 /* +2+2 for action + code + capabilites */
2294 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2, efrm, &ie,
2295 IEEE80211_ACTION_MESHPEERING_OPEN);
2296 if (meshpeer == NULL) {
2297 return 0;
2298 }
2299
2300 /* XXX move up */
2301 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2302 "recv PEER OPEN, lid 0x%x", meshpeer->peer_llinkid);
2303
2304 switch (ni->ni_mlstate) {
2305 case IEEE80211_NODE_MESH_IDLE:
2306 /* Reject open request if reached our maximum neighbor count */
2307 if (ms->ms_neighbors >= IEEE80211_MESH_MAX_NEIGHBORS) {
2308 args[0] = meshpeer->peer_llinkid;
2309 args[1] = 0;
2310 args[2] = IEEE80211_REASON_MESH_MAX_PEERS;
2311 ieee80211_send_action(ni,
2312 IEEE80211_ACTION_CAT_SELF_PROT,
2313 IEEE80211_ACTION_MESHPEERING_CLOSE,
2314 args);
2315 /* stay in IDLE state */
2316 return (0);
2317 }
2318 /* Open frame accepted */
2319 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV);
2320 ni->ni_mllid = meshpeer->peer_llinkid;
2321 ni->ni_mlpid = mesh_generateid(vap);
2322 if (ni->ni_mlpid == 0)
2323 return 0; /* XXX */
2324 args[0] = ni->ni_mlpid;
2325 /* Announce we're open too... */
2326 ieee80211_send_action(ni,
2327 IEEE80211_ACTION_CAT_SELF_PROT,
2328 IEEE80211_ACTION_MESHPEERING_OPEN, args);
2329 /* ...and confirm the link. */
2330 args[0] = ni->ni_mlpid;
2331 args[1] = ni->ni_mllid;
2332 ieee80211_send_action(ni,
2333 IEEE80211_ACTION_CAT_SELF_PROT,
2334 IEEE80211_ACTION_MESHPEERING_CONFIRM,
2335 args);
2336 mesh_peer_timeout_setup(ni);
2337 break;
2338 case IEEE80211_NODE_MESH_OPENRCV:
2339 /* Wrong Link ID */
2340 if (ni->ni_mllid != meshpeer->peer_llinkid) {
2341 args[0] = ni->ni_mllid;
2342 args[1] = ni->ni_mlpid;
2343 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2344 ieee80211_send_action(ni,
2345 IEEE80211_ACTION_CAT_SELF_PROT,
2346 IEEE80211_ACTION_MESHPEERING_CLOSE,
2347 args);
2348 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2349 mesh_peer_timeout_setup(ni);
2350 break;
2351 }
2352 /* Duplicate open, confirm again. */
2353 args[0] = ni->ni_mlpid;
2354 args[1] = ni->ni_mllid;
2355 ieee80211_send_action(ni,
2356 IEEE80211_ACTION_CAT_SELF_PROT,
2357 IEEE80211_ACTION_MESHPEERING_CONFIRM,
2358 args);
2359 break;
2360 case IEEE80211_NODE_MESH_OPENSNT:
2361 ni->ni_mllid = meshpeer->peer_llinkid;
2362 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV);
2363 args[0] = ni->ni_mlpid;
2364 args[1] = ni->ni_mllid;
2365 ieee80211_send_action(ni,
2366 IEEE80211_ACTION_CAT_SELF_PROT,
2367 IEEE80211_ACTION_MESHPEERING_CONFIRM,
2368 args);
2369 /* NB: don't setup/clear any timeout */
2370 break;
2371 case IEEE80211_NODE_MESH_CONFIRMRCV:
2372 if (ni->ni_mlpid != meshpeer->peer_linkid ||
2373 ni->ni_mllid != meshpeer->peer_llinkid) {
2374 args[0] = ni->ni_mlpid;
2375 args[1] = ni->ni_mllid;
2376 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2377 ieee80211_send_action(ni,
2378 IEEE80211_ACTION_CAT_SELF_PROT,
2379 IEEE80211_ACTION_MESHPEERING_CLOSE,
2380 args);
2381 mesh_linkchange(ni,
2382 IEEE80211_NODE_MESH_HOLDING);
2383 mesh_peer_timeout_setup(ni);
2384 break;
2385 }
2386 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED);
2387 ni->ni_mllid = meshpeer->peer_llinkid;
2388 args[0] = ni->ni_mlpid;
2389 args[1] = ni->ni_mllid;
2390 ieee80211_send_action(ni,
2391 IEEE80211_ACTION_CAT_SELF_PROT,
2392 IEEE80211_ACTION_MESHPEERING_CONFIRM,
2393 args);
2394 mesh_peer_timeout_stop(ni);
2395 break;
2396 case IEEE80211_NODE_MESH_ESTABLISHED:
2397 if (ni->ni_mllid != meshpeer->peer_llinkid) {
2398 args[0] = ni->ni_mllid;
2399 args[1] = ni->ni_mlpid;
2400 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2401 ieee80211_send_action(ni,
2402 IEEE80211_ACTION_CAT_SELF_PROT,
2403 IEEE80211_ACTION_MESHPEERING_CLOSE,
2404 args);
2405 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2406 mesh_peer_timeout_setup(ni);
2407 break;
2408 }
2409 args[0] = ni->ni_mlpid;
2410 args[1] = ni->ni_mllid;
2411 ieee80211_send_action(ni,
2412 IEEE80211_ACTION_CAT_SELF_PROT,
2413 IEEE80211_ACTION_MESHPEERING_CONFIRM,
2414 args);
2415 break;
2416 case IEEE80211_NODE_MESH_HOLDING:
2417 args[0] = ni->ni_mlpid;
2418 args[1] = meshpeer->peer_llinkid;
2419 /* Standard not clear about what the reaason code should be */
2420 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2421 ieee80211_send_action(ni,
2422 IEEE80211_ACTION_CAT_SELF_PROT,
2423 IEEE80211_ACTION_MESHPEERING_CLOSE,
2424 args);
2425 break;
2426 }
2427 return 0;
2428 }
2429
2430 static int
2431 mesh_recv_action_meshpeering_confirm(struct ieee80211_node *ni,
2432 const struct ieee80211_frame *wh,
2433 const uint8_t *frm, const uint8_t *efrm)
2434 {
2435 struct ieee80211vap *vap = ni->ni_vap;
2436 struct ieee80211_meshpeer_ie ie;
2437 const struct ieee80211_meshpeer_ie *meshpeer;
2438 uint16_t args[3];
2439
2440 /* +2+2+2+2 for action + code + capabilites + status code + AID */
2441 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2+2+2, efrm, &ie,
2442 IEEE80211_ACTION_MESHPEERING_CONFIRM);
2443 if (meshpeer == NULL) {
2444 return 0;
2445 }
2446
2447 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2448 "recv PEER CONFIRM, local id 0x%x, peer id 0x%x",
2449 meshpeer->peer_llinkid, meshpeer->peer_linkid);
2450
2451 switch (ni->ni_mlstate) {
2452 case IEEE80211_NODE_MESH_OPENRCV:
2453 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED);
2454 mesh_peer_timeout_stop(ni);
2455 break;
2456 case IEEE80211_NODE_MESH_OPENSNT:
2457 mesh_linkchange(ni, IEEE80211_NODE_MESH_CONFIRMRCV);
2458 mesh_peer_timeout_setup(ni);
2459 break;
2460 case IEEE80211_NODE_MESH_HOLDING:
2461 args[0] = ni->ni_mlpid;
2462 args[1] = meshpeer->peer_llinkid;
2463 /* Standard not clear about what the reaason code should be */
2464 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2465 ieee80211_send_action(ni,
2466 IEEE80211_ACTION_CAT_SELF_PROT,
2467 IEEE80211_ACTION_MESHPEERING_CLOSE,
2468 args);
2469 break;
2470 case IEEE80211_NODE_MESH_CONFIRMRCV:
2471 if (ni->ni_mllid != meshpeer->peer_llinkid) {
2472 args[0] = ni->ni_mlpid;
2473 args[1] = ni->ni_mllid;
2474 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2475 ieee80211_send_action(ni,
2476 IEEE80211_ACTION_CAT_SELF_PROT,
2477 IEEE80211_ACTION_MESHPEERING_CLOSE,
2478 args);
2479 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2480 mesh_peer_timeout_setup(ni);
2481 }
2482 break;
2483 default:
2484 IEEE80211_DISCARD(vap,
2485 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2486 wh, NULL, "received confirm in invalid state %d",
2487 ni->ni_mlstate);
2488 vap->iv_stats.is_rx_mgtdiscard++;
2489 break;
2490 }
2491 return 0;
2492 }
2493
2494 static int
2495 mesh_recv_action_meshpeering_close(struct ieee80211_node *ni,
2496 const struct ieee80211_frame *wh,
2497 const uint8_t *frm, const uint8_t *efrm)
2498 {
2499 struct ieee80211_meshpeer_ie ie;
2500 const struct ieee80211_meshpeer_ie *meshpeer;
2501 uint16_t args[3];
2502
2503 /* +2 for action + code */
2504 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2, efrm, &ie,
2505 IEEE80211_ACTION_MESHPEERING_CLOSE);
2506 if (meshpeer == NULL) {
2507 return 0;
2508 }
2509
2510 /*
2511 * XXX: check reason code, for example we could receive
2512 * IEEE80211_REASON_MESH_MAX_PEERS then we should not attempt
2513 * to peer again.
2514 */
2515
2516 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2517 ni, "%s", "recv PEER CLOSE");
2518
2519 switch (ni->ni_mlstate) {
2520 case IEEE80211_NODE_MESH_IDLE:
2521 /* ignore */
2522 break;
2523 case IEEE80211_NODE_MESH_OPENRCV:
2524 case IEEE80211_NODE_MESH_OPENSNT:
2525 case IEEE80211_NODE_MESH_CONFIRMRCV:
2526 case IEEE80211_NODE_MESH_ESTABLISHED:
2527 args[0] = ni->ni_mlpid;
2528 args[1] = ni->ni_mllid;
2529 args[2] = IEEE80211_REASON_MESH_CLOSE_RCVD;
2530 ieee80211_send_action(ni,
2531 IEEE80211_ACTION_CAT_SELF_PROT,
2532 IEEE80211_ACTION_MESHPEERING_CLOSE,
2533 args);
2534 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2535 mesh_peer_timeout_setup(ni);
2536 break;
2537 case IEEE80211_NODE_MESH_HOLDING:
2538 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE);
2539 mesh_peer_timeout_stop(ni);
2540 break;
2541 }
2542 return 0;
2543 }
2544
2545 /*
2546 * Link Metric handling.
2547 */
2548 static int
2549 mesh_recv_action_meshlmetric(struct ieee80211_node *ni,
2550 const struct ieee80211_frame *wh,
2551 const uint8_t *frm, const uint8_t *efrm)
2552 {
2553 const struct ieee80211_meshlmetric_ie *ie =
2554 (const struct ieee80211_meshlmetric_ie *)
2555 (frm+2); /* action + code */
2556 struct ieee80211_meshlmetric_ie lm_rep;
2557
2558 if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) {
2559 lm_rep.lm_flags = 0;
2560 lm_rep.lm_metric = mesh_airtime_calc(ni);
2561 ieee80211_send_action(ni,
2562 IEEE80211_ACTION_CAT_MESH,
2563 IEEE80211_ACTION_MESH_LMETRIC,
2564 &lm_rep);
2565 }
2566 /* XXX: else do nothing for now */
2567 return 0;
2568 }
2569
2570 /*
2571 * Parse meshgate action ie's for GANN frames.
2572 * Returns -1 if parsing fails, otherwise 0.
2573 */
2574 static int
2575 mesh_parse_meshgate_action(struct ieee80211_node *ni,
2576 const struct ieee80211_frame *wh, /* XXX for VERIFY_LENGTH */
2577 struct ieee80211_meshgann_ie *ie, const uint8_t *frm, const uint8_t *efrm)
2578 {
2579 struct ieee80211vap *vap = ni->ni_vap;
2580 const struct ieee80211_meshgann_ie *gannie;
2581
2582 while (efrm - frm > 1) {
2583 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return -1);
2584 switch (*frm) {
2585 case IEEE80211_ELEMID_MESHGANN:
2586 gannie = (const struct ieee80211_meshgann_ie *) frm;
2587 memset(ie, 0, sizeof(*ie));
2588 ie->gann_ie = gannie->gann_ie;
2589 ie->gann_len = gannie->gann_len;
2590 ie->gann_flags = gannie->gann_flags;
2591 ie->gann_hopcount = gannie->gann_hopcount;
2592 ie->gann_ttl = gannie->gann_ttl;
2593 IEEE80211_ADDR_COPY(ie->gann_addr, gannie->gann_addr);
2594 ie->gann_seq = le32dec(&gannie->gann_seq);
2595 ie->gann_interval = le16dec(&gannie->gann_interval);
2596 break;
2597 }
2598 frm += frm[1] + 2;
2599 }
2600
2601 return 0;
2602 }
2603
2604 /*
2605 * Mesh Gate Announcement handling.
2606 */
2607 static int
2608 mesh_recv_action_meshgate(struct ieee80211_node *ni,
2609 const struct ieee80211_frame *wh,
2610 const uint8_t *frm, const uint8_t *efrm)
2611 {
2612 struct ieee80211vap *vap = ni->ni_vap;
2613 struct ieee80211_mesh_state *ms = vap->iv_mesh;
2614 struct ieee80211_mesh_gate_route *gr, *next;
2615 struct ieee80211_mesh_route *rt_gate;
2616 struct ieee80211_meshgann_ie pgann;
2617 struct ieee80211_meshgann_ie ie;
2618 int found = 0;
2619
2620 /* +2 for action + code */
2621 if (mesh_parse_meshgate_action(ni, wh, &ie, frm+2, efrm) != 0) {
2622 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
2623 ni->ni_macaddr, NULL, "%s",
2624 "GANN parsing failed");
2625 vap->iv_stats.is_rx_mgtdiscard++;
2626 return (0);
2627 }
2628
2629 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ie.gann_addr))
2630 return 0;
2631
2632 #if defined(__DragonFly__)
2633 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ni->ni_macaddr,
2634 "received GANN, meshgate: %s (seq %u)",
2635 ether_sprintf(ie.gann_addr),
2636 ie.gann_seq);
2637 #else
2638 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ni->ni_macaddr,
2639 "received GANN, meshgate: %6D (seq %u)", ie.gann_addr, ":",
2640 ie.gann_seq);
2641 #endif
2642
2643 if (ms == NULL)
2644 return (0);
2645 MESH_RT_LOCK(ms);
2646 TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) {
2647 if (!IEEE80211_ADDR_EQ(gr->gr_addr, ie.gann_addr))
2648 continue;
2649 if (ie.gann_seq <= gr->gr_lastseq) {
2650 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
2651 ni->ni_macaddr, NULL,
2652 "GANN old seqno %u <= %u",
2653 ie.gann_seq, gr->gr_lastseq);
2654 MESH_RT_UNLOCK(ms);
2655 return (0);
2656 }
2657 /* corresponding mesh gate found & GANN accepted */
2658 found = 1;
2659 break;
2660
2661 }
2662 if (found == 0) {
2663 /* this GANN is from a new mesh Gate add it to known table. */
2664 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie.gann_addr,
2665 "stored new GANN information, seq %u.", ie.gann_seq);
2666 #if defined(__DragonFly__)
2667 gr = kmalloc(ALIGN(sizeof(struct ieee80211_mesh_gate_route)),
2668 M_80211_MESH_GT_RT, M_INTWAIT | M_ZERO);
2669 #else
2670 gr = IEEE80211_MALLOC(ALIGN(sizeof(struct ieee80211_mesh_gate_route)),
2671 M_80211_MESH_GT_RT,
2672 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
2673 #endif
2674 IEEE80211_ADDR_COPY(gr->gr_addr, ie.gann_addr);
2675 TAILQ_INSERT_TAIL(&ms->ms_known_gates, gr, gr_next);
2676 }
2677 gr->gr_lastseq = ie.gann_seq;
2678
2679 /* check if we have a path to this gate */
2680 rt_gate = mesh_rt_find_locked(ms, gr->gr_addr);
2681 if (rt_gate != NULL &&
2682 rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) {
2683 gr->gr_route = rt_gate;
2684 rt_gate->rt_flags |= IEEE80211_MESHRT_FLAGS_GATE;
2685 }
2686
2687 MESH_RT_UNLOCK(ms);
2688
2689 /* popagate only if decremented ttl >= 1 && forwarding is enabled */
2690 if ((ie.gann_ttl - 1) < 1 && !(ms->ms_flags & IEEE80211_MESHFLAGS_FWD))
2691 return 0;
2692 pgann.gann_flags = ie.gann_flags; /* Reserved */
2693 pgann.gann_hopcount = ie.gann_hopcount + 1;
2694 pgann.gann_ttl = ie.gann_ttl - 1;
2695 IEEE80211_ADDR_COPY(pgann.gann_addr, ie.gann_addr);
2696 pgann.gann_seq = ie.gann_seq;
2697 pgann.gann_interval = ie.gann_interval;
2698
2699 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie.gann_addr,
2700 "%s", "propagate GANN");
2701
2702 ieee80211_send_action(vap->iv_bss, IEEE80211_ACTION_CAT_MESH,
2703 IEEE80211_ACTION_MESH_GANN, &pgann);
2704
2705 return 0;
2706 }
2707
2708 static int
2709 mesh_send_action(struct ieee80211_node *ni,
2710 const uint8_t sa[IEEE80211_ADDR_LEN],
2711 const uint8_t da[IEEE80211_ADDR_LEN],
2712 struct mbuf *m)
2713 {
2714 struct ieee80211vap *vap = ni->ni_vap;
2715 struct ieee80211com *ic = ni->ni_ic;
2716 struct ieee80211_bpf_params params;
2717 struct ieee80211_frame *wh;
2718 int ret;
2719
2720 KASSERT(ni != NULL, ("null node"));
2721
2722 if (vap->iv_state == IEEE80211_S_CAC) {
2723 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT, ni,
2724 "block %s frame in CAC state", "Mesh action");
2725 vap->iv_stats.is_tx_badstate++;
2726 ieee80211_free_node(ni);
2727 m_freem(m);
2728 return EIO; /* XXX */
2729 }
2730
2731 M_PREPEND(m, sizeof(struct ieee80211_frame), M_NOWAIT);
2732 if (m == NULL) {
2733 ieee80211_free_node(ni);
2734 return ENOMEM;
2735 }
2736
2737 IEEE80211_TX_LOCK(ic);
2738 wh = mtod(m, struct ieee80211_frame *);
2739 ieee80211_send_setup(ni, m,
2740 IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_ACTION,
2741 IEEE80211_NONQOS_TID, sa, da, sa);
2742 m->m_flags |= M_ENCAP; /* mark encapsulated */
2743
2744 memset(&params, 0, sizeof(params));
2745 params.ibp_pri = WME_AC_VO;
2746 params.ibp_rate0 = ni->ni_txparms->mgmtrate;
2747 if (IEEE80211_IS_MULTICAST(da))
2748 params.ibp_try0 = 1;
2749 else
2750 params.ibp_try0 = ni->ni_txparms->maxretry;
2751 params.ibp_power = ni->ni_txpower;
2752
2753 IEEE80211_NODE_STAT(ni, tx_mgmt);
2754
2755 ret = ieee80211_raw_output(vap, ni, m, &params);
2756 IEEE80211_TX_UNLOCK(ic);
2757 return (ret);
2758 }
2759
2760 #define ADDSHORT(frm, v) do { \
2761 frm[0] = (v) & 0xff; \
2762 frm[1] = (v) >> 8; \
2763 frm += 2; \
2764 } while (0)
2765 #define ADDWORD(frm, v) do { \
2766 frm[0] = (v) & 0xff; \
2767 frm[1] = ((v) >> 8) & 0xff; \
2768 frm[2] = ((v) >> 16) & 0xff; \
2769 frm[3] = ((v) >> 24) & 0xff; \
2770 frm += 4; \
2771 } while (0)
2772
2773 static int
2774 mesh_send_action_meshpeering_open(struct ieee80211_node *ni,
2775 int category, int action, void *args0)
2776 {
2777 struct ieee80211vap *vap = ni->ni_vap;
2778 struct ieee80211com *ic = ni->ni_ic;
2779 uint16_t *args = args0;
2780 const struct ieee80211_rateset *rs;
2781 struct mbuf *m;
2782 uint8_t *frm;
2783
2784 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2785 "send PEER OPEN action: localid 0x%x", args[0]);
2786
2787 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2788 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2789 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2790 ieee80211_ref_node(ni);
2791
2792 m = ieee80211_getmgtframe(&frm,
2793 ic->ic_headroom + sizeof(struct ieee80211_frame),
2794 sizeof(uint16_t) /* action+category */
2795 + sizeof(uint16_t) /* capabilites */
2796 + 2 + IEEE80211_RATE_SIZE
2797 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
2798 + 2 + IEEE80211_MESHID_LEN
2799 + sizeof(struct ieee80211_meshconf_ie)
2800 + sizeof(struct ieee80211_meshpeer_ie)
2801 );
2802 if (m != NULL) {
2803 /*
2804 * mesh peer open action frame format:
2805 * [1] category
2806 * [1] action
2807 * [2] capabilities
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 rs = ieee80211_get_suprates(ic, ic->ic_curchan);
2818 frm = ieee80211_add_rates(frm, rs);
2819 frm = ieee80211_add_xrates(frm, rs);
2820 frm = ieee80211_add_meshid(frm, vap);
2821 frm = ieee80211_add_meshconf(frm, vap);
2822 frm = ieee80211_add_meshpeer(frm, IEEE80211_ACTION_MESHPEERING_OPEN,
2823 args[0], 0, 0);
2824 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2825 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m);
2826 } else {
2827 vap->iv_stats.is_tx_nobuf++;
2828 ieee80211_free_node(ni);
2829 return ENOMEM;
2830 }
2831 }
2832
2833 static int
2834 mesh_send_action_meshpeering_confirm(struct ieee80211_node *ni,
2835 int category, int action, void *args0)
2836 {
2837 struct ieee80211vap *vap = ni->ni_vap;
2838 struct ieee80211com *ic = ni->ni_ic;
2839 uint16_t *args = args0;
2840 const struct ieee80211_rateset *rs;
2841 struct mbuf *m;
2842 uint8_t *frm;
2843
2844 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2845 "send PEER CONFIRM action: localid 0x%x, peerid 0x%x",
2846 args[0], args[1]);
2847
2848 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2849 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2850 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2851 ieee80211_ref_node(ni);
2852
2853 m = ieee80211_getmgtframe(&frm,
2854 ic->ic_headroom + sizeof(struct ieee80211_frame),
2855 sizeof(uint16_t) /* action+category */
2856 + sizeof(uint16_t) /* capabilites */
2857 + sizeof(uint16_t) /* status code */
2858 + sizeof(uint16_t) /* AID */
2859 + 2 + IEEE80211_RATE_SIZE
2860 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
2861 + 2 + IEEE80211_MESHID_LEN
2862 + sizeof(struct ieee80211_meshconf_ie)
2863 + sizeof(struct ieee80211_meshpeer_ie)
2864 );
2865 if (m != NULL) {
2866 /*
2867 * mesh peer confirm action frame format:
2868 * [1] category
2869 * [1] action
2870 * [2] capabilities
2871 * [2] status code
2872 * [2] association id (peer ID)
2873 * [tlv] rates
2874 * [tlv] xrates
2875 * [tlv] mesh id
2876 * [tlv] mesh conf
2877 * [tlv] mesh peer link mgmt
2878 */
2879 *frm++ = category;
2880 *frm++ = action;
2881 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan));
2882 ADDSHORT(frm, 0); /* status code */
2883 ADDSHORT(frm, args[1]); /* AID */
2884 rs = ieee80211_get_suprates(ic, ic->ic_curchan);
2885 frm = ieee80211_add_rates(frm, rs);
2886 frm = ieee80211_add_xrates(frm, rs);
2887 frm = ieee80211_add_meshid(frm, vap);
2888 frm = ieee80211_add_meshconf(frm, vap);
2889 frm = ieee80211_add_meshpeer(frm,
2890 IEEE80211_ACTION_MESHPEERING_CONFIRM,
2891 args[0], args[1], 0);
2892 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2893 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m);
2894 } else {
2895 vap->iv_stats.is_tx_nobuf++;
2896 ieee80211_free_node(ni);
2897 return ENOMEM;
2898 }
2899 }
2900
2901 static int
2902 mesh_send_action_meshpeering_close(struct ieee80211_node *ni,
2903 int category, int action, void *args0)
2904 {
2905 struct ieee80211vap *vap = ni->ni_vap;
2906 struct ieee80211com *ic = ni->ni_ic;
2907 uint16_t *args = args0;
2908 struct mbuf *m;
2909 uint8_t *frm;
2910
2911 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2912 "send PEER CLOSE action: localid 0x%x, peerid 0x%x reason %d (%s)",
2913 args[0], args[1], args[2], ieee80211_reason_to_string(args[2]));
2914
2915 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2916 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2917 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2918 ieee80211_ref_node(ni);
2919
2920 m = ieee80211_getmgtframe(&frm,
2921 ic->ic_headroom + sizeof(struct ieee80211_frame),
2922 sizeof(uint16_t) /* action+category */
2923 + sizeof(uint16_t) /* reason code */
2924 + 2 + IEEE80211_MESHID_LEN
2925 + sizeof(struct ieee80211_meshpeer_ie)
2926 );
2927 if (m != NULL) {
2928 /*
2929 * mesh peer close action frame format:
2930 * [1] category
2931 * [1] action
2932 * [tlv] mesh id
2933 * [tlv] mesh peer link mgmt
2934 */
2935 *frm++ = category;
2936 *frm++ = action;
2937 frm = ieee80211_add_meshid(frm, vap);
2938 frm = ieee80211_add_meshpeer(frm,
2939 IEEE80211_ACTION_MESHPEERING_CLOSE,
2940 args[0], args[1], args[2]);
2941 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2942 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m);
2943 } else {
2944 vap->iv_stats.is_tx_nobuf++;
2945 ieee80211_free_node(ni);
2946 return ENOMEM;
2947 }
2948 }
2949
2950 static int
2951 mesh_send_action_meshlmetric(struct ieee80211_node *ni,
2952 int category, int action, void *arg0)
2953 {
2954 struct ieee80211vap *vap = ni->ni_vap;
2955 struct ieee80211com *ic = ni->ni_ic;
2956 struct ieee80211_meshlmetric_ie *ie = arg0;
2957 struct mbuf *m;
2958 uint8_t *frm;
2959
2960 if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) {
2961 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2962 ni, "%s", "send LINK METRIC REQUEST action");
2963 } else {
2964 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2965 ni, "send LINK METRIC REPLY action: metric 0x%x",
2966 ie->lm_metric);
2967 }
2968 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2969 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2970 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2971 ieee80211_ref_node(ni);
2972
2973 m = ieee80211_getmgtframe(&frm,
2974 ic->ic_headroom + sizeof(struct ieee80211_frame),
2975 sizeof(uint16_t) + /* action+category */
2976 sizeof(struct ieee80211_meshlmetric_ie)
2977 );
2978 if (m != NULL) {
2979 /*
2980 * mesh link metric
2981 * [1] category
2982 * [1] action
2983 * [tlv] mesh link metric
2984 */
2985 *frm++ = category;
2986 *frm++ = action;
2987 frm = ieee80211_add_meshlmetric(frm,
2988 ie->lm_flags, ie->lm_metric);
2989 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2990 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m);
2991 } else {
2992 vap->iv_stats.is_tx_nobuf++;
2993 ieee80211_free_node(ni);
2994 return ENOMEM;
2995 }
2996 }
2997
2998 static int
2999 mesh_send_action_meshgate(struct ieee80211_node *ni,
3000 int category, int action, void *arg0)
3001 {
3002 struct ieee80211vap *vap = ni->ni_vap;
3003 struct ieee80211com *ic = ni->ni_ic;
3004 struct ieee80211_meshgann_ie *ie = arg0;
3005 struct mbuf *m;
3006 uint8_t *frm;
3007
3008 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
3009 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
3010 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
3011 ieee80211_ref_node(ni);
3012
3013 m = ieee80211_getmgtframe(&frm,
3014 ic->ic_headroom + sizeof(struct ieee80211_frame),
3015 sizeof(uint16_t) + /* action+category */
3016 IEEE80211_MESHGANN_BASE_SZ
3017 );
3018 if (m != NULL) {
3019 /*
3020 * mesh link metric
3021 * [1] category
3022 * [1] action
3023 * [tlv] mesh gate annoucement
3024 */
3025 *frm++ = category;
3026 *frm++ = action;
3027 frm = ieee80211_add_meshgate(frm, ie);
3028 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
3029 return mesh_send_action(ni, vap->iv_myaddr, broadcastaddr, m);
3030 } else {
3031 vap->iv_stats.is_tx_nobuf++;
3032 ieee80211_free_node(ni);
3033 return ENOMEM;
3034 }
3035 }
3036
3037 static void
3038 mesh_peer_timeout_setup(struct ieee80211_node *ni)
3039 {
3040 switch (ni->ni_mlstate) {
3041 case IEEE80211_NODE_MESH_HOLDING:
3042 ni->ni_mltval = ieee80211_mesh_holdingtimeout;
3043 break;
3044 case IEEE80211_NODE_MESH_CONFIRMRCV:
3045 ni->ni_mltval = ieee80211_mesh_confirmtimeout;
3046 break;
3047 case IEEE80211_NODE_MESH_IDLE:
3048 ni->ni_mltval = 0;
3049 break;
3050 default:
3051 ni->ni_mltval = ieee80211_mesh_retrytimeout;
3052 break;
3053 }
3054 if (ni->ni_mltval)
3055 callout_reset(&ni->ni_mltimer, ni->ni_mltval,
3056 mesh_peer_timeout_cb, ni);
3057 }
3058
3059 /*
3060 * Same as above but backoffs timer statisically 50%.
3061 */
3062 static void
3063 mesh_peer_timeout_backoff(struct ieee80211_node *ni)
3064 {
3065 uint32_t r;
3066
3067 r = arc4random();
3068 ni->ni_mltval += r % ni->ni_mltval;
3069 callout_reset(&ni->ni_mltimer, ni->ni_mltval, mesh_peer_timeout_cb,
3070 ni);
3071 }
3072
3073 static __inline void
3074 mesh_peer_timeout_stop(struct ieee80211_node *ni)
3075 {
3076 callout_drain(&ni->ni_mltimer);
3077 }
3078
3079 static void
3080 mesh_peer_backoff_cb(void *arg)
3081 {
3082 struct ieee80211_node *ni = (struct ieee80211_node *)arg;
3083
3084 /* After backoff timeout, try to peer automatically again. */
3085 ni->ni_mlhcnt = 0;
3086 }
3087
3088 /*
3089 * Mesh Peer Link Management FSM timeout handling.
3090 */
3091 static void
3092 mesh_peer_timeout_cb(void *arg)
3093 {
3094 struct ieee80211_node *ni = (struct ieee80211_node *)arg;
3095 uint16_t args[3];
3096
3097 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_MESH,
3098 ni, "mesh link timeout, state %d, retry counter %d",
3099 ni->ni_mlstate, ni->ni_mlrcnt);
3100
3101 switch (ni->ni_mlstate) {
3102 case IEEE80211_NODE_MESH_IDLE:
3103 case IEEE80211_NODE_MESH_ESTABLISHED:
3104 break;
3105 case IEEE80211_NODE_MESH_OPENSNT:
3106 case IEEE80211_NODE_MESH_OPENRCV:
3107 if (ni->ni_mlrcnt == ieee80211_mesh_maxretries) {
3108 args[0] = ni->ni_mlpid;
3109 args[2] = IEEE80211_REASON_MESH_MAX_RETRIES;
3110 ieee80211_send_action(ni,
3111 IEEE80211_ACTION_CAT_SELF_PROT,
3112 IEEE80211_ACTION_MESHPEERING_CLOSE, args);
3113 ni->ni_mlrcnt = 0;
3114 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
3115 mesh_peer_timeout_setup(ni);
3116 } else {
3117 args[0] = ni->ni_mlpid;
3118 ieee80211_send_action(ni,
3119 IEEE80211_ACTION_CAT_SELF_PROT,
3120 IEEE80211_ACTION_MESHPEERING_OPEN, args);
3121 ni->ni_mlrcnt++;
3122 mesh_peer_timeout_backoff(ni);
3123 }
3124 break;
3125 case IEEE80211_NODE_MESH_CONFIRMRCV:
3126 args[0] = ni->ni_mlpid;
3127 args[2] = IEEE80211_REASON_MESH_CONFIRM_TIMEOUT;
3128 ieee80211_send_action(ni,
3129 IEEE80211_ACTION_CAT_SELF_PROT,
3130 IEEE80211_ACTION_MESHPEERING_CLOSE, args);
3131 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
3132 mesh_peer_timeout_setup(ni);
3133 break;
3134 case IEEE80211_NODE_MESH_HOLDING:
3135 ni->ni_mlhcnt++;
3136 if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding)
3137 callout_reset(&ni->ni_mlhtimer,
3138 ieee80211_mesh_backofftimeout,
3139 mesh_peer_backoff_cb, ni);
3140 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE);
3141 break;
3142 }
3143 }
3144
3145 static int
3146 mesh_verify_meshid(struct ieee80211vap *vap, const uint8_t *ie)
3147 {
3148 struct ieee80211_mesh_state *ms = vap->iv_mesh;
3149
3150 if (ie == NULL || ie[1] != ms->ms_idlen)
3151 return 1;
3152 return memcmp(ms->ms_id, ie + 2, ms->ms_idlen);
3153 }
3154
3155 /*
3156 * Check if we are using the same algorithms for this mesh.
3157 */
3158 static int
3159 mesh_verify_meshconf(struct ieee80211vap *vap, const uint8_t *ie)
3160 {
3161 const struct ieee80211_meshconf_ie *meshconf =
3162 (const struct ieee80211_meshconf_ie *) ie;
3163 const struct ieee80211_mesh_state *ms = vap->iv_mesh;
3164
3165 if (meshconf == NULL)
3166 return 1;
3167 if (meshconf->conf_pselid != ms->ms_ppath->mpp_ie) {
3168 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3169 "unknown path selection algorithm: 0x%x\n",
3170 meshconf->conf_pselid);
3171 return 1;
3172 }
3173 if (meshconf->conf_pmetid != ms->ms_pmetric->mpm_ie) {
3174 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3175 "unknown path metric algorithm: 0x%x\n",
3176 meshconf->conf_pmetid);
3177 return 1;
3178 }
3179 if (meshconf->conf_ccid != 0) {
3180 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3181 "unknown congestion control algorithm: 0x%x\n",
3182 meshconf->conf_ccid);
3183 return 1;
3184 }
3185 if (meshconf->conf_syncid != IEEE80211_MESHCONF_SYNC_NEIGHOFF) {
3186 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3187 "unknown sync algorithm: 0x%x\n",
3188 meshconf->conf_syncid);
3189 return 1;
3190 }
3191 if (meshconf->conf_authid != 0) {
3192 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3193 "unknown auth auth algorithm: 0x%x\n",
3194 meshconf->conf_pselid);
3195 return 1;
3196 }
3197 /* Not accepting peers */
3198 if (!(meshconf->conf_cap & IEEE80211_MESHCONF_CAP_AP)) {
3199 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3200 "not accepting peers: 0x%x\n", meshconf->conf_cap);
3201 return 1;
3202 }
3203 return 0;
3204 }
3205
3206 static int
3207 mesh_verify_meshpeer(struct ieee80211vap *vap, uint8_t subtype,
3208 const uint8_t *ie)
3209 {
3210 const struct ieee80211_meshpeer_ie *meshpeer =
3211 (const struct ieee80211_meshpeer_ie *) ie;
3212
3213 if (meshpeer == NULL ||
3214 meshpeer->peer_len < IEEE80211_MPM_BASE_SZ ||
3215 meshpeer->peer_len > IEEE80211_MPM_MAX_SZ)
3216 return 1;
3217 if (meshpeer->peer_proto != IEEE80211_MPPID_MPM) {
3218 IEEE80211_DPRINTF(vap,
3219 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
3220 "Only MPM protocol is supported (proto: 0x%02X)",
3221 meshpeer->peer_proto);
3222 return 1;
3223 }
3224 switch (subtype) {
3225 case IEEE80211_ACTION_MESHPEERING_OPEN:
3226 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ)
3227 return 1;
3228 break;
3229 case IEEE80211_ACTION_MESHPEERING_CONFIRM:
3230 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ + 2)
3231 return 1;
3232 break;
3233 case IEEE80211_ACTION_MESHPEERING_CLOSE:
3234 if (meshpeer->peer_len < IEEE80211_MPM_BASE_SZ + 2)
3235 return 1;
3236 if (meshpeer->peer_len == (IEEE80211_MPM_BASE_SZ + 2) &&
3237 meshpeer->peer_linkid != 0)
3238 return 1;
3239 if (meshpeer->peer_rcode == 0)
3240 return 1;
3241 break;
3242 }
3243 return 0;
3244 }
3245
3246 /*
3247 * Add a Mesh ID IE to a frame.
3248 */
3249 uint8_t *
3250 ieee80211_add_meshid(uint8_t *frm, struct ieee80211vap *vap)
3251 {
3252 struct ieee80211_mesh_state *ms = vap->iv_mesh;
3253
3254 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a mbss vap"));
3255
3256 *frm++ = IEEE80211_ELEMID_MESHID;
3257 *frm++ = ms->ms_idlen;
3258 memcpy(frm, ms->ms_id, ms->ms_idlen);
3259 return frm + ms->ms_idlen;
3260 }
3261
3262 /*
3263 * Add a Mesh Configuration IE to a frame.
3264 * For now just use HWMP routing, Airtime link metric, Null Congestion
3265 * Signaling, Null Sync Protocol and Null Authentication.
3266 */
3267 uint8_t *
3268 ieee80211_add_meshconf(uint8_t *frm, struct ieee80211vap *vap)
3269 {
3270 const struct ieee80211_mesh_state *ms = vap->iv_mesh;
3271 uint16_t caps;
3272
3273 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap"));
3274
3275 *frm++ = IEEE80211_ELEMID_MESHCONF;
3276 *frm++ = IEEE80211_MESH_CONF_SZ;
3277 *frm++ = ms->ms_ppath->mpp_ie; /* path selection */
3278 *frm++ = ms->ms_pmetric->mpm_ie; /* link metric */
3279 *frm++ = IEEE80211_MESHCONF_CC_DISABLED;
3280 *frm++ = IEEE80211_MESHCONF_SYNC_NEIGHOFF;
3281 *frm++ = IEEE80211_MESHCONF_AUTH_DISABLED;
3282 /* NB: set the number of neighbors before the rest */
3283 *frm = (ms->ms_neighbors > IEEE80211_MESH_MAX_NEIGHBORS ?
3284 IEEE80211_MESH_MAX_NEIGHBORS : ms->ms_neighbors) << 1;
3285 if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE)
3286 *frm |= IEEE80211_MESHCONF_FORM_GATE;
3287 frm += 1;
3288 caps = 0;
3289 if (ms->ms_flags & IEEE80211_MESHFLAGS_AP)
3290 caps |= IEEE80211_MESHCONF_CAP_AP;
3291 if (ms->ms_flags & IEEE80211_MESHFLAGS_FWD)
3292 caps |= IEEE80211_MESHCONF_CAP_FWRD;
3293 *frm++ = caps;
3294 return frm;
3295 }
3296
3297 /*
3298 * Add a Mesh Peer Management IE to a frame.
3299 */
3300 uint8_t *
3301 ieee80211_add_meshpeer(uint8_t *frm, uint8_t subtype, uint16_t localid,
3302 uint16_t peerid, uint16_t reason)
3303 {
3304
3305 KASSERT(localid != 0, ("localid == 0"));
3306
3307 *frm++ = IEEE80211_ELEMID_MESHPEER;
3308 switch (subtype) {
3309 case IEEE80211_ACTION_MESHPEERING_OPEN:
3310 *frm++ = IEEE80211_MPM_BASE_SZ; /* length */
3311 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */
3312 ADDSHORT(frm, localid); /* local ID */
3313 break;
3314 case IEEE80211_ACTION_MESHPEERING_CONFIRM:
3315 KASSERT(peerid != 0, ("sending peer confirm without peer id"));
3316 *frm++ = IEEE80211_MPM_BASE_SZ + 2; /* length */
3317 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */
3318 ADDSHORT(frm, localid); /* local ID */
3319 ADDSHORT(frm, peerid); /* peer ID */
3320 break;
3321 case IEEE80211_ACTION_MESHPEERING_CLOSE:
3322 if (peerid)
3323 *frm++ = IEEE80211_MPM_MAX_SZ; /* length */
3324 else
3325 *frm++ = IEEE80211_MPM_BASE_SZ + 2; /* length */
3326 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */
3327 ADDSHORT(frm, localid); /* local ID */
3328 if (peerid)
3329 ADDSHORT(frm, peerid); /* peer ID */
3330 ADDSHORT(frm, reason);
3331 break;
3332 }
3333 return frm;
3334 }
3335
3336 /*
3337 * Compute an Airtime Link Metric for the link with this node.
3338 *
3339 * Based on Draft 3.0 spec (11B.10, p.149).
3340 */
3341 /*
3342 * Max 802.11s overhead.
3343 */
3344 #define IEEE80211_MESH_MAXOVERHEAD \
3345 (sizeof(struct ieee80211_qosframe_addr4) \
3346 + sizeof(struct ieee80211_meshcntl_ae10) \
3347 + sizeof(struct llc) \
3348 + IEEE80211_ADDR_LEN \
3349 + IEEE80211_WEP_IVLEN \
3350 + IEEE80211_WEP_KIDLEN \
3351 + IEEE80211_WEP_CRCLEN \
3352 + IEEE80211_WEP_MICLEN \
3353 + IEEE80211_CRC_LEN)
3354 uint32_t
3355 mesh_airtime_calc(struct ieee80211_node *ni)
3356 {
3357 #define M_BITS 8
3358 #define S_FACTOR (2 * M_BITS)
3359 struct ieee80211com *ic = ni->ni_ic;
3360 struct ifnet *ifp = ni->ni_vap->iv_ifp;
3361 static const int nbits = 8192 << M_BITS;
3362 uint32_t overhead, rate, errrate;
3363 uint64_t res;
3364
3365 /* Time to transmit a frame */
3366 rate = ni->ni_txrate;
3367 overhead = ieee80211_compute_duration(ic->ic_rt,
3368 ifp->if_mtu + IEEE80211_MESH_MAXOVERHEAD, rate, 0) << M_BITS;
3369 /* Error rate in percentage */
3370 /* XXX assuming small failures are ok */
3371 #if defined(__DragonFly__)
3372 u_long icount;
3373 u_long ocount;
3374 IFNET_STAT_GET(ifp, ierrors, icount);
3375 IFNET_STAT_GET(ifp, oerrors, ocount);
3376 errrate = (((ocount + icount) / 100) << M_BITS)
3377 / 100;
3378 #else
3379 errrate = (((ifp->if_get_counter(ifp, IFCOUNTER_OERRORS) +
3380 ifp->if_get_counter(ifp, IFCOUNTER_IERRORS)) / 100) << M_BITS)
3381 / 100;
3382 #endif
3383 res = (overhead + (nbits / rate)) *
3384 ((1 << S_FACTOR) / ((1 << M_BITS) - errrate));
3385
3386 return (uint32_t)(res >> S_FACTOR);
3387 #undef M_BITS
3388 #undef S_FACTOR
3389 }
3390
3391 /*
3392 * Add a Mesh Link Metric report IE to a frame.
3393 */
3394 uint8_t *
3395 ieee80211_add_meshlmetric(uint8_t *frm, uint8_t flags, uint32_t metric)
3396 {
3397 *frm++ = IEEE80211_ELEMID_MESHLINK;
3398 *frm++ = 5;
3399 *frm++ = flags;
3400 ADDWORD(frm, metric);
3401 return frm;
3402 }
3403
3404 /*
3405 * Add a Mesh Gate Announcement IE to a frame.
3406 */
3407 uint8_t *
3408 ieee80211_add_meshgate(uint8_t *frm, struct ieee80211_meshgann_ie *ie)
3409 {
3410 *frm++ = IEEE80211_ELEMID_MESHGANN; /* ie */
3411 *frm++ = IEEE80211_MESHGANN_BASE_SZ; /* len */
3412 *frm++ = ie->gann_flags;
3413 *frm++ = ie->gann_hopcount;
3414 *frm++ = ie->gann_ttl;
3415 IEEE80211_ADDR_COPY(frm, ie->gann_addr);
3416 frm += 6;
3417 ADDWORD(frm, ie->gann_seq);
3418 ADDSHORT(frm, ie->gann_interval);
3419 return frm;
3420 }
3421 #undef ADDSHORT
3422 #undef ADDWORD
3423
3424 /*
3425 * Initialize any mesh-specific node state.
3426 */
3427 void
3428 ieee80211_mesh_node_init(struct ieee80211vap *vap, struct ieee80211_node *ni)
3429 {
3430 ni->ni_flags |= IEEE80211_NODE_QOS;
3431 #if defined(__DragonFly__)
3432 callout_init_mp(&ni->ni_mltimer);
3433 callout_init_mp(&ni->ni_mlhtimer);
3434 #else
3435 callout_init(&ni->ni_mltimer, 1);
3436 callout_init(&ni->ni_mlhtimer, 1);
3437 #endif
3438 }
3439
3440 /*
3441 * Cleanup any mesh-specific node state.
3442 */
3443 void
3444 ieee80211_mesh_node_cleanup(struct ieee80211_node *ni)
3445 {
3446 struct ieee80211vap *vap = ni->ni_vap;
3447 struct ieee80211_mesh_state *ms = vap->iv_mesh;
3448
3449 callout_drain(&ni->ni_mltimer);
3450 callout_drain(&ni->ni_mlhtimer);
3451 /* NB: short-circuit callbacks after mesh_vdetach */
3452 if (vap->iv_mesh != NULL)
3453 ms->ms_ppath->mpp_peerdown(ni);
3454 }
3455
3456 void
3457 ieee80211_parse_meshid(struct ieee80211_node *ni, const uint8_t *ie)
3458 {
3459 ni->ni_meshidlen = ie[1];
3460 memcpy(ni->ni_meshid, ie + 2, ie[1]);
3461 }
3462
3463 /*
3464 * Setup mesh-specific node state on neighbor discovery.
3465 */
3466 void
3467 ieee80211_mesh_init_neighbor(struct ieee80211_node *ni,
3468 const struct ieee80211_frame *wh,
3469 const struct ieee80211_scanparams *sp)
3470 {
3471 ieee80211_parse_meshid(ni, sp->meshid);
3472 }
3473
3474 void
3475 ieee80211_mesh_update_beacon(struct ieee80211vap *vap,
3476 struct ieee80211_beacon_offsets *bo)
3477 {
3478 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap"));
3479
3480 if (isset(bo->bo_flags, IEEE80211_BEACON_MESHCONF)) {
3481 (void)ieee80211_add_meshconf(bo->bo_meshconf, vap);
3482 clrbit(bo->bo_flags, IEEE80211_BEACON_MESHCONF);
3483 }
3484 }
3485
3486 static int
3487 mesh_ioctl_get80211(struct ieee80211vap *vap, struct ieee80211req *ireq)
3488 {
3489 struct ieee80211_mesh_state *ms = vap->iv_mesh;
3490 uint8_t tmpmeshid[IEEE80211_NWID_LEN];
3491 struct ieee80211_mesh_route *rt;
3492 struct ieee80211req_mesh_route *imr;
3493 size_t len, off;
3494 uint8_t *p;
3495 int error;
3496
3497 if (vap->iv_opmode != IEEE80211_M_MBSS)
3498 return ENOSYS;
3499
3500 error = 0;
3501 switch (ireq->i_type) {
3502 case IEEE80211_IOC_MESH_ID:
3503 ireq->i_len = ms->ms_idlen;
3504 memcpy(tmpmeshid, ms->ms_id, ireq->i_len);
3505 error = copyout(tmpmeshid, ireq->i_data, ireq->i_len);
3506 break;
3507 case IEEE80211_IOC_MESH_AP:
3508 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_AP) != 0;
3509 break;
3510 case IEEE80211_IOC_MESH_FWRD:
3511 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) != 0;
3512 break;
3513 case IEEE80211_IOC_MESH_GATE:
3514 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) != 0;
3515 break;
3516 case IEEE80211_IOC_MESH_TTL:
3517 ireq->i_val = ms->ms_ttl;
3518 break;
3519 case IEEE80211_IOC_MESH_RTCMD:
3520 switch (ireq->i_val) {
3521 case IEEE80211_MESH_RTCMD_LIST:
3522 len = 0;
3523 MESH_RT_LOCK(ms);
3524 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) {
3525 len += sizeof(*imr);
3526 }
3527 MESH_RT_UNLOCK(ms);
3528 if (len > ireq->i_len || ireq->i_len < sizeof(*imr)) {
3529 ireq->i_len = len;
3530 return ENOMEM;
3531 }
3532 ireq->i_len = len;
3533 /* XXX M_WAIT? */
3534 #if defined(__DragonFly__)
3535 p = kmalloc(len, M_TEMP, M_INTWAIT | M_ZERO);
3536 #else
3537 p = IEEE80211_MALLOC(len, M_TEMP,
3538 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
3539 #endif
3540 if (p == NULL)
3541 return ENOMEM;
3542 off = 0;
3543 MESH_RT_LOCK(ms);
3544 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) {
3545 if (off >= len)
3546 break;
3547 imr = (struct ieee80211req_mesh_route *)
3548 (p + off);
3549 IEEE80211_ADDR_COPY(imr->imr_dest,
3550 rt->rt_dest);
3551 IEEE80211_ADDR_COPY(imr->imr_nexthop,
3552 rt->rt_nexthop);
3553 imr->imr_metric = rt->rt_metric;
3554 imr->imr_nhops = rt->rt_nhops;
3555 imr->imr_lifetime =
3556 ieee80211_mesh_rt_update(rt, 0);
3557 imr->imr_lastmseq = rt->rt_lastmseq;
3558 imr->imr_flags = rt->rt_flags; /* last */
3559 off += sizeof(*imr);
3560 }
3561 MESH_RT_UNLOCK(ms);
3562 error = copyout(p, (uint8_t *)ireq->i_data,
3563 ireq->i_len);
3564 IEEE80211_FREE(p, M_TEMP);
3565 break;
3566 case IEEE80211_MESH_RTCMD_FLUSH:
3567 case IEEE80211_MESH_RTCMD_ADD:
3568 case IEEE80211_MESH_RTCMD_DELETE:
3569 return EINVAL;
3570 default:
3571 return ENOSYS;
3572 }
3573 break;
3574 case IEEE80211_IOC_MESH_PR_METRIC:
3575 len = strlen(ms->ms_pmetric->mpm_descr);
3576 if (ireq->i_len < len)
3577 return EINVAL;
3578 ireq->i_len = len;
3579 error = copyout(ms->ms_pmetric->mpm_descr,
3580 (uint8_t *)ireq->i_data, len);
3581 break;
3582 case IEEE80211_IOC_MESH_PR_PATH:
3583 len = strlen(ms->ms_ppath->mpp_descr);
3584 if (ireq->i_len < len)
3585 return EINVAL;
3586 ireq->i_len = len;
3587 error = copyout(ms->ms_ppath->mpp_descr,
3588 (uint8_t *)ireq->i_data, len);
3589 break;
3590 default:
3591 return ENOSYS;
3592 }
3593
3594 return error;
3595 }
3596 IEEE80211_IOCTL_GET(mesh, mesh_ioctl_get80211);
3597
3598 static int
3599 mesh_ioctl_set80211(struct ieee80211vap *vap, struct ieee80211req *ireq)
3600 {
3601 struct ieee80211_mesh_state *ms = vap->iv_mesh;
3602 uint8_t tmpmeshid[IEEE80211_NWID_LEN];
3603 uint8_t tmpaddr[IEEE80211_ADDR_LEN];
3604 char tmpproto[IEEE80211_MESH_PROTO_DSZ];
3605 int error;
3606
3607 if (vap->iv_opmode != IEEE80211_M_MBSS)
3608 return ENOSYS;
3609
3610 error = 0;
3611 switch (ireq->i_type) {
3612 case IEEE80211_IOC_MESH_ID:
3613 if (ireq->i_val != 0 || ireq->i_len > IEEE80211_MESHID_LEN)
3614 return EINVAL;
3615 error = copyin(ireq->i_data, tmpmeshid, ireq->i_len);
3616 if (error != 0)
3617 break;
3618 memset(ms->ms_id, 0, IEEE80211_NWID_LEN);
3619 ms->ms_idlen = ireq->i_len;
3620 memcpy(ms->ms_id, tmpmeshid, ireq->i_len);
3621 error = ENETRESET;
3622 break;
3623 case IEEE80211_IOC_MESH_AP:
3624 if (ireq->i_val)
3625 ms->ms_flags |= IEEE80211_MESHFLAGS_AP;
3626 else
3627 ms->ms_flags &= ~IEEE80211_MESHFLAGS_AP;
3628 error = ENETRESET;
3629 break;
3630 case IEEE80211_IOC_MESH_FWRD:
3631 if (ireq->i_val)
3632 ms->ms_flags |= IEEE80211_MESHFLAGS_FWD;
3633 else
3634 ms->ms_flags &= ~IEEE80211_MESHFLAGS_FWD;
3635 mesh_gatemode_setup(vap);
3636 break;
3637 case IEEE80211_IOC_MESH_GATE:
3638 if (ireq->i_val)
3639 ms->ms_flags |= IEEE80211_MESHFLAGS_GATE;
3640 else
3641 ms->ms_flags &= ~IEEE80211_MESHFLAGS_GATE;
3642 break;
3643 case IEEE80211_IOC_MESH_TTL:
3644 ms->ms_ttl = (uint8_t) ireq->i_val;
3645 break;
3646 case IEEE80211_IOC_MESH_RTCMD:
3647 switch (ireq->i_val) {
3648 case IEEE80211_MESH_RTCMD_LIST:
3649 return EINVAL;
3650 case IEEE80211_MESH_RTCMD_FLUSH:
3651 ieee80211_mesh_rt_flush(vap);
3652 break;
3653 case IEEE80211_MESH_RTCMD_ADD:
3654 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ireq->i_data) ||
3655 IEEE80211_ADDR_EQ(broadcastaddr, ireq->i_data))
3656 return EINVAL;
3657 error = copyin(ireq->i_data, &tmpaddr,
3658 IEEE80211_ADDR_LEN);
3659 if (error == 0)
3660 ieee80211_mesh_discover(vap, tmpaddr, NULL);
3661 break;
3662 case IEEE80211_MESH_RTCMD_DELETE:
3663 ieee80211_mesh_rt_del(vap, ireq->i_data);
3664 break;
3665 default:
3666 return ENOSYS;
3667 }
3668 break;
3669 case IEEE80211_IOC_MESH_PR_METRIC:
3670 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto));
3671 if (error == 0) {
3672 error = mesh_select_proto_metric(vap, tmpproto);
3673 if (error == 0)
3674 error = ENETRESET;
3675 }
3676 break;
3677 case IEEE80211_IOC_MESH_PR_PATH:
3678 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto));
3679 if (error == 0) {
3680 error = mesh_select_proto_path(vap, tmpproto);
3681 if (error == 0)
3682 error = ENETRESET;
3683 }
3684 break;
3685 default:
3686 return ENOSYS;
3687 }
3688 return error;
3689 }
3690 IEEE80211_IOCTL_SET(mesh, mesh_ioctl_set80211);
DragonFly BSD