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: head/sys/net80211/ieee80211_mesh.c 254082 2013-08-08 05:09:35Z adrian $");
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_media.h>
58#include <net/if_llc.h>
59#include <net/ethernet.h>
60
61#include <net80211/ieee80211_var.h>
62#include <net80211/ieee80211_action.h>
63#ifdef IEEE80211_SUPPORT_SUPERG
64#include <net80211/ieee80211_superg.h>
65#endif
66#include <net80211/ieee80211_input.h>
67#include <net80211/ieee80211_mesh.h>
68
69static void mesh_rt_flush_invalid(struct ieee80211vap *);
70static int mesh_select_proto_path(struct ieee80211vap *, const char *);
71static int mesh_select_proto_metric(struct ieee80211vap *, const char *);
72static void mesh_vattach(struct ieee80211vap *);
73static int mesh_newstate(struct ieee80211vap *, enum ieee80211_state, int);
74static void mesh_rt_cleanup_cb(void *);
75static void mesh_gatemode_setup(struct ieee80211vap *);
76static void mesh_gatemode_cb(void *);
77static void mesh_linkchange(struct ieee80211_node *,
78 enum ieee80211_mesh_mlstate);
79static void mesh_checkid(void *, struct ieee80211_node *);
80static uint32_t mesh_generateid(struct ieee80211vap *);
81static int mesh_checkpseq(struct ieee80211vap *,
82 const uint8_t [IEEE80211_ADDR_LEN], uint32_t);
83static void mesh_transmit_to_gate(struct ieee80211vap *, struct mbuf *,
84 struct ieee80211_mesh_route *);
85static void mesh_forward(struct ieee80211vap *, struct mbuf *,
86 const struct ieee80211_meshcntl *);
87static int mesh_input(struct ieee80211_node *, struct mbuf *, int, int);
88static void mesh_recv_mgmt(struct ieee80211_node *, struct mbuf *, int,
89 int, int);
90static void mesh_recv_ctl(struct ieee80211_node *, struct mbuf *, int);
91static void mesh_peer_timeout_setup(struct ieee80211_node *);
92static void mesh_peer_timeout_backoff(struct ieee80211_node *);
93static void mesh_peer_timeout_cb(void *);
94static __inline void
95 mesh_peer_timeout_stop(struct ieee80211_node *);
96static int mesh_verify_meshid(struct ieee80211vap *, const uint8_t *);
97static int mesh_verify_meshconf(struct ieee80211vap *, const uint8_t *);
98static int mesh_verify_meshpeer(struct ieee80211vap *, uint8_t,
99 const uint8_t *);
100uint32_t mesh_airtime_calc(struct ieee80211_node *);
101
102/*
103 * Timeout values come from the specification and are in milliseconds.
104 */
105static SYSCTL_NODE(_net_wlan, OID_AUTO, mesh, CTLFLAG_RD, 0,
106 "IEEE 802.11s parameters");
107static int ieee80211_mesh_gateint = -1;
108SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, gateint, CTLTYPE_INT | CTLFLAG_RW,
109 &ieee80211_mesh_gateint, 0, ieee80211_sysctl_msecs_ticks, "I",
110 "mesh gate interval (ms)");
111static int ieee80211_mesh_retrytimeout = -1;
112SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, retrytimeout, CTLTYPE_INT | CTLFLAG_RW,
113 &ieee80211_mesh_retrytimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
114 "Retry timeout (msec)");
115static int ieee80211_mesh_holdingtimeout = -1;
116
117SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, holdingtimeout, CTLTYPE_INT | CTLFLAG_RW,
118 &ieee80211_mesh_holdingtimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
119 "Holding state timeout (msec)");
120static int ieee80211_mesh_confirmtimeout = -1;
121SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, confirmtimeout, CTLTYPE_INT | CTLFLAG_RW,
122 &ieee80211_mesh_confirmtimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
123 "Confirm state timeout (msec)");
124static int ieee80211_mesh_backofftimeout = -1;
125SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, backofftimeout, CTLTYPE_INT | CTLFLAG_RW,
126 &ieee80211_mesh_backofftimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
127 "Backoff timeout (msec). This is to throutles peering forever when "
128 "not receving answer or is rejected by a neighbor");
129static int ieee80211_mesh_maxretries = 2;
130SYSCTL_INT(_net_wlan_mesh, OID_AUTO, maxretries, CTLTYPE_INT | CTLFLAG_RW,
131 &ieee80211_mesh_maxretries, 0,
132 "Maximum retries during peer link establishment");
133static int ieee80211_mesh_maxholding = 2;
134SYSCTL_INT(_net_wlan_mesh, OID_AUTO, maxholding, CTLTYPE_INT | CTLFLAG_RW,
135 &ieee80211_mesh_maxholding, 0,
136 "Maximum times we are allowed to transition to HOLDING state before "
137 "backinoff during peer link establishment");
138
139static const uint8_t broadcastaddr[IEEE80211_ADDR_LEN] =
140 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
141
142static ieee80211_recv_action_func mesh_recv_action_meshpeering_open;
143static ieee80211_recv_action_func mesh_recv_action_meshpeering_confirm;
144static ieee80211_recv_action_func mesh_recv_action_meshpeering_close;
145static ieee80211_recv_action_func mesh_recv_action_meshlmetric;
146static ieee80211_recv_action_func mesh_recv_action_meshgate;
147
148static ieee80211_send_action_func mesh_send_action_meshpeering_open;
149static ieee80211_send_action_func mesh_send_action_meshpeering_confirm;
150static ieee80211_send_action_func mesh_send_action_meshpeering_close;
151static ieee80211_send_action_func mesh_send_action_meshlmetric;
152static ieee80211_send_action_func mesh_send_action_meshgate;
153
154static const struct ieee80211_mesh_proto_metric mesh_metric_airtime = {
155 .mpm_descr = "AIRTIME",
156 .mpm_ie = IEEE80211_MESHCONF_METRIC_AIRTIME,
157 .mpm_metric = mesh_airtime_calc,
158};
159
160static struct ieee80211_mesh_proto_path mesh_proto_paths[4];
161static struct ieee80211_mesh_proto_metric mesh_proto_metrics[4];
162
163#define RT_ENTRY_LOCK(rt) mtx_lock(&(rt)->rt_lock)
164#define RT_ENTRY_LOCK_ASSERT(rt) mtx_assert(&(rt)->rt_lock, MA_OWNED)
165#define RT_ENTRY_UNLOCK(rt) mtx_unlock(&(rt)->rt_lock)
166
167#define MESH_RT_LOCK(ms) mtx_lock(&(ms)->ms_rt_lock)
168#define MESH_RT_LOCK_ASSERT(ms) mtx_assert(&(ms)->ms_rt_lock, MA_OWNED)
169#define MESH_RT_UNLOCK(ms) mtx_unlock(&(ms)->ms_rt_lock)
170
171MALLOC_DEFINE(M_80211_MESH_PREQ, "80211preq", "802.11 MESH Path Request frame");
172MALLOC_DEFINE(M_80211_MESH_PREP, "80211prep", "802.11 MESH Path Reply frame");
173MALLOC_DEFINE(M_80211_MESH_PERR, "80211perr", "802.11 MESH Path Error frame");
174
175/* The longer one of the lifetime should be stored as new lifetime */
176#define MESH_ROUTE_LIFETIME_MAX(a, b) (a > b ? a : b)
177
178MALLOC_DEFINE(M_80211_MESH_RT, "80211mesh_rt", "802.11s routing table");
179MALLOC_DEFINE(M_80211_MESH_GT_RT, "80211mesh_gt", "802.11s known gates table");
180
181/*
182 * Helper functions to manipulate the Mesh routing table.
183 */
184
185static struct ieee80211_mesh_route *
186mesh_rt_find_locked(struct ieee80211_mesh_state *ms,
187 const uint8_t dest[IEEE80211_ADDR_LEN])
188{
189 struct ieee80211_mesh_route *rt;
190
191 MESH_RT_LOCK_ASSERT(ms);
192
193 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) {
194 if (IEEE80211_ADDR_EQ(dest, rt->rt_dest))
195 return rt;
196 }
197 return NULL;
198}
199
200static struct ieee80211_mesh_route *
201mesh_rt_add_locked(struct ieee80211vap *vap,
202 const uint8_t dest[IEEE80211_ADDR_LEN])
203{
204 struct ieee80211_mesh_state *ms = vap->iv_mesh;
205 struct ieee80211_mesh_route *rt;
206
207 KASSERT(!IEEE80211_ADDR_EQ(broadcastaddr, dest),
208 ("%s: adding broadcast to the routing table", __func__));
209
210 MESH_RT_LOCK_ASSERT(ms);
211
212 rt = malloc(ALIGN(sizeof(struct ieee80211_mesh_route)) +
213 ms->ms_ppath->mpp_privlen, M_80211_MESH_RT, M_NOWAIT | M_ZERO);
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 mtx_init(&rt->rt_lock, "MBSS_RT", "802.11s route entry", MTX_DEF);
219 callout_init(&rt->rt_discovery, CALLOUT_MPSAFE);
220 rt->rt_updtime = ticks; /* create time */
221 TAILQ_INSERT_TAIL(&ms->ms_routes, rt, rt_next);
222 }
223 return rt;
224}
225
226struct ieee80211_mesh_route *
227ieee80211_mesh_rt_find(struct ieee80211vap *vap,
228 const uint8_t dest[IEEE80211_ADDR_LEN])
229{
230 struct ieee80211_mesh_state *ms = vap->iv_mesh;
231 struct ieee80211_mesh_route *rt;
232
233 MESH_RT_LOCK(ms);
234 rt = mesh_rt_find_locked(ms, dest);
235 MESH_RT_UNLOCK(ms);
236 return rt;
237}
238
239struct ieee80211_mesh_route *
240ieee80211_mesh_rt_add(struct ieee80211vap *vap,
241 const uint8_t dest[IEEE80211_ADDR_LEN])
242{
243 struct ieee80211_mesh_state *ms = vap->iv_mesh;
244 struct ieee80211_mesh_route *rt;
245
246 KASSERT(ieee80211_mesh_rt_find(vap, dest) == NULL,
247 ("%s: duplicate entry in the routing table", __func__));
248 KASSERT(!IEEE80211_ADDR_EQ(vap->iv_myaddr, dest),
249 ("%s: adding self to the routing table", __func__));
250
251 MESH_RT_LOCK(ms);
252 rt = mesh_rt_add_locked(vap, dest);
253 MESH_RT_UNLOCK(ms);
254 return rt;
255}
256
257/*
258 * Update the route lifetime and returns the updated lifetime.
259 * If new_lifetime is zero and route is timedout it will be invalidated.
260 * new_lifetime is in msec
261 */
262int
263ieee80211_mesh_rt_update(struct ieee80211_mesh_route *rt, int new_lifetime)
264{
265 int timesince, now;
266 uint32_t lifetime = 0;
267
268 KASSERT(rt != NULL, ("route is NULL"));
269
270 now = ticks;
271 RT_ENTRY_LOCK(rt);
272
273 /* dont clobber a proxy entry gated by us */
274 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY && rt->rt_nhops == 0) {
275 RT_ENTRY_UNLOCK(rt);
276 return rt->rt_lifetime;
277 }
278
279 timesince = ticks_to_msecs(now - rt->rt_updtime);
280 rt->rt_updtime = now;
281 if (timesince >= rt->rt_lifetime) {
282 if (new_lifetime != 0) {
283 rt->rt_lifetime = new_lifetime;
284 }
285 else {
286 rt->rt_flags &= ~IEEE80211_MESHRT_FLAGS_VALID;
287 rt->rt_lifetime = 0;
288 }
289 } else {
290 /* update what is left of lifetime */
291 rt->rt_lifetime = rt->rt_lifetime - timesince;
292 rt->rt_lifetime = MESH_ROUTE_LIFETIME_MAX(
293 new_lifetime, rt->rt_lifetime);
294 }
295 lifetime = rt->rt_lifetime;
296 RT_ENTRY_UNLOCK(rt);
297
298 return lifetime;
299}
300
301/*
302 * Add a proxy route (as needed) for the specified destination.
303 */
304void
305ieee80211_mesh_proxy_check(struct ieee80211vap *vap,
306 const uint8_t dest[IEEE80211_ADDR_LEN])
307{
308 struct ieee80211_mesh_state *ms = vap->iv_mesh;
309 struct ieee80211_mesh_route *rt;
310
311 MESH_RT_LOCK(ms);
312 rt = mesh_rt_find_locked(ms, dest);
313 if (rt == NULL) {
314 rt = mesh_rt_add_locked(vap, dest);
315 if (rt == NULL) {
316 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
317 "%s", "unable to add proxy entry");
318 vap->iv_stats.is_mesh_rtaddfailed++;
319 } else {
320 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
321 "%s", "add proxy entry");
322 IEEE80211_ADDR_COPY(rt->rt_mesh_gate, vap->iv_myaddr);
323 IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr);
324 rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID
325 | IEEE80211_MESHRT_FLAGS_PROXY;
326 }
327 } else if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) {
328 KASSERT(rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY,
329 ("no proxy flag for poxy entry"));
330 struct ieee80211com *ic = vap->iv_ic;
331 /*
332 * Fix existing entry created by received frames from
333 * stations that have some memory of dest. We also
334 * flush any frames held on the staging queue; delivering
335 * them is too much trouble right now.
336 */
337 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
338 "%s", "fix proxy entry");
339 IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr);
340 rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID
341 | IEEE80211_MESHRT_FLAGS_PROXY;
342 /* XXX belongs in hwmp */
343 ieee80211_ageq_drain_node(&ic->ic_stageq,
344 (void *)(uintptr_t) ieee80211_mac_hash(ic, dest));
345 /* XXX stat? */
346 }
347 MESH_RT_UNLOCK(ms);
348}
349
350static __inline void
351mesh_rt_del(struct ieee80211_mesh_state *ms, struct ieee80211_mesh_route *rt)
352{
353 TAILQ_REMOVE(&ms->ms_routes, rt, rt_next);
354 /*
355 * Grab the lock before destroying it, to be sure no one else
356 * is holding the route.
357 */
358 RT_ENTRY_LOCK(rt);
359 callout_drain(&rt->rt_discovery);
360 mtx_destroy(&rt->rt_lock);
361 free(rt, M_80211_MESH_RT);
362}
363
364void
365ieee80211_mesh_rt_del(struct ieee80211vap *vap,
366 const uint8_t dest[IEEE80211_ADDR_LEN])
367{
368 struct ieee80211_mesh_state *ms = vap->iv_mesh;
369 struct ieee80211_mesh_route *rt, *next;
370
371 MESH_RT_LOCK(ms);
372 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) {
373 if (IEEE80211_ADDR_EQ(rt->rt_dest, dest)) {
374 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) {
375 ms->ms_ppath->mpp_senderror(vap, dest, rt,
376 IEEE80211_REASON_MESH_PERR_NO_PROXY);
377 } else {
378 ms->ms_ppath->mpp_senderror(vap, dest, rt,
379 IEEE80211_REASON_MESH_PERR_DEST_UNREACH);
380 }
381 mesh_rt_del(ms, rt);
382 MESH_RT_UNLOCK(ms);
383 return;
384 }
385 }
386 MESH_RT_UNLOCK(ms);
387}
388
389void
390ieee80211_mesh_rt_flush(struct ieee80211vap *vap)
391{
392 struct ieee80211_mesh_state *ms = vap->iv_mesh;
393 struct ieee80211_mesh_route *rt, *next;
394
395 if (ms == NULL)
396 return;
397 MESH_RT_LOCK(ms);
398 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next)
399 mesh_rt_del(ms, rt);
400 MESH_RT_UNLOCK(ms);
401}
402
403void
404ieee80211_mesh_rt_flush_peer(struct ieee80211vap *vap,
405 const uint8_t peer[IEEE80211_ADDR_LEN])
406{
407 struct ieee80211_mesh_state *ms = vap->iv_mesh;
408 struct ieee80211_mesh_route *rt, *next;
409
410 MESH_RT_LOCK(ms);
411 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) {
412 if (IEEE80211_ADDR_EQ(rt->rt_nexthop, peer))
413 mesh_rt_del(ms, rt);
414 }
415 MESH_RT_UNLOCK(ms);
416}
417
418/*
419 * Flush expired routing entries, i.e. those in invalid state for
420 * some time.
421 */
422static void
423mesh_rt_flush_invalid(struct ieee80211vap *vap)
424{
425 struct ieee80211_mesh_state *ms = vap->iv_mesh;
426 struct ieee80211_mesh_route *rt, *next;
427
428 if (ms == NULL)
429 return;
430 MESH_RT_LOCK(ms);
431 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) {
432 /* Discover paths will be deleted by their own callout */
433 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_DISCOVER)
434 continue;
435 ieee80211_mesh_rt_update(rt, 0);
436 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0)
437 mesh_rt_del(ms, rt);
438 }
439 MESH_RT_UNLOCK(ms);
440}
441
442#define N(a) (sizeof(a) / sizeof(a[0]))
443int
444ieee80211_mesh_register_proto_path(const struct ieee80211_mesh_proto_path *mpp)
445{
446 int i, firstempty = -1;
447
448 for (i = 0; i < N(mesh_proto_paths); i++) {
449 if (strncmp(mpp->mpp_descr, mesh_proto_paths[i].mpp_descr,
450 IEEE80211_MESH_PROTO_DSZ) == 0)
451 return EEXIST;
452 if (!mesh_proto_paths[i].mpp_active && firstempty == -1)
453 firstempty = i;
454 }
455 if (firstempty < 0)
456 return ENOSPC;
457 memcpy(&mesh_proto_paths[firstempty], mpp, sizeof(*mpp));
458 mesh_proto_paths[firstempty].mpp_active = 1;
459 return 0;
460}
461
462int
463ieee80211_mesh_register_proto_metric(const struct
464 ieee80211_mesh_proto_metric *mpm)
465{
466 int i, firstempty = -1;
467
468 for (i = 0; i < N(mesh_proto_metrics); i++) {
469 if (strncmp(mpm->mpm_descr, mesh_proto_metrics[i].mpm_descr,
470 IEEE80211_MESH_PROTO_DSZ) == 0)
471 return EEXIST;
472 if (!mesh_proto_metrics[i].mpm_active && firstempty == -1)
473 firstempty = i;
474 }
475 if (firstempty < 0)
476 return ENOSPC;
477 memcpy(&mesh_proto_metrics[firstempty], mpm, sizeof(*mpm));
478 mesh_proto_metrics[firstempty].mpm_active = 1;
479 return 0;
480}
481
482static int
483mesh_select_proto_path(struct ieee80211vap *vap, const char *name)
484{
485 struct ieee80211_mesh_state *ms = vap->iv_mesh;
486 int i;
487
488 for (i = 0; i < N(mesh_proto_paths); i++) {
489 if (strcasecmp(mesh_proto_paths[i].mpp_descr, name) == 0) {
490 ms->ms_ppath = &mesh_proto_paths[i];
491 return 0;
492 }
493 }
494 return ENOENT;
495}
496
497static int
498mesh_select_proto_metric(struct ieee80211vap *vap, const char *name)
499{
500 struct ieee80211_mesh_state *ms = vap->iv_mesh;
501 int i;
502
503 for (i = 0; i < N(mesh_proto_metrics); i++) {
504 if (strcasecmp(mesh_proto_metrics[i].mpm_descr, name) == 0) {
505 ms->ms_pmetric = &mesh_proto_metrics[i];
506 return 0;
507 }
508 }
509 return ENOENT;
510}
511#undef N
512
513static void
514mesh_gatemode_setup(struct ieee80211vap *vap)
515{
516 struct ieee80211_mesh_state *ms = vap->iv_mesh;
517
518 /*
519 * NB: When a mesh gate is running as a ROOT it shall
520 * not send out periodic GANNs but instead mark the
521 * mesh gate flag for the corresponding proactive PREQ
522 * and RANN frames.
523 */
524 if (ms->ms_flags & IEEE80211_MESHFLAGS_ROOT ||
525 (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) == 0) {
526 callout_drain(&ms->ms_gatetimer);
527 return ;
528 }
529 callout_reset(&ms->ms_gatetimer, ieee80211_mesh_gateint,
530 mesh_gatemode_cb, vap);
531}
532
533static void
534mesh_gatemode_cb(void *arg)
535{
536 struct ieee80211vap *vap = (struct ieee80211vap *)arg;
537 struct ieee80211_mesh_state *ms = vap->iv_mesh;
538 struct ieee80211_meshgann_ie gann;
539
540 gann.gann_flags = 0; /* Reserved */
541 gann.gann_hopcount = 0;
542 gann.gann_ttl = ms->ms_ttl;
543 IEEE80211_ADDR_COPY(gann.gann_addr, vap->iv_myaddr);
544 gann.gann_seq = ms->ms_gateseq++;
545 gann.gann_interval = ieee80211_mesh_gateint;
546
547 IEEE80211_NOTE(vap, IEEE80211_MSG_MESH, vap->iv_bss,
548 "send broadcast GANN (seq %u)", gann.gann_seq);
549
550 ieee80211_send_action(vap->iv_bss, IEEE80211_ACTION_CAT_MESH,
551 IEEE80211_ACTION_MESH_GANN, &gann);
552 mesh_gatemode_setup(vap);
553}
554
555static void
556ieee80211_mesh_init(void)
557{
558
559 memset(mesh_proto_paths, 0, sizeof(mesh_proto_paths));
560 memset(mesh_proto_metrics, 0, sizeof(mesh_proto_metrics));
561
562 /*
563 * Setup mesh parameters that depends on the clock frequency.
564 */
565 ieee80211_mesh_gateint = msecs_to_ticks(10000);
566 ieee80211_mesh_retrytimeout = msecs_to_ticks(40);
567 ieee80211_mesh_holdingtimeout = msecs_to_ticks(40);
568 ieee80211_mesh_confirmtimeout = msecs_to_ticks(40);
569 ieee80211_mesh_backofftimeout = msecs_to_ticks(5000);
570
571 /*
572 * Register action frame handlers.
573 */
574 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
575 IEEE80211_ACTION_MESHPEERING_OPEN,
576 mesh_recv_action_meshpeering_open);
577 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
578 IEEE80211_ACTION_MESHPEERING_CONFIRM,
579 mesh_recv_action_meshpeering_confirm);
580 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
581 IEEE80211_ACTION_MESHPEERING_CLOSE,
582 mesh_recv_action_meshpeering_close);
583 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESH,
584 IEEE80211_ACTION_MESH_LMETRIC, mesh_recv_action_meshlmetric);
585 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESH,
586 IEEE80211_ACTION_MESH_GANN, mesh_recv_action_meshgate);
587
588 ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
589 IEEE80211_ACTION_MESHPEERING_OPEN,
590 mesh_send_action_meshpeering_open);
591 ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
592 IEEE80211_ACTION_MESHPEERING_CONFIRM,
593 mesh_send_action_meshpeering_confirm);
594 ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
595 IEEE80211_ACTION_MESHPEERING_CLOSE,
596 mesh_send_action_meshpeering_close);
597 ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESH,
598 IEEE80211_ACTION_MESH_LMETRIC,
599 mesh_send_action_meshlmetric);
600 ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESH,
601 IEEE80211_ACTION_MESH_GANN,
602 mesh_send_action_meshgate);
603
604 /*
605 * Register Airtime Link Metric.
606 */
607 ieee80211_mesh_register_proto_metric(&mesh_metric_airtime);
608
609}
610SYSINIT(wlan_mesh, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_mesh_init, NULL);
611
612void
613ieee80211_mesh_attach(struct ieee80211com *ic)
614{
615 ic->ic_vattach[IEEE80211_M_MBSS] = mesh_vattach;
616}
617
618void
619ieee80211_mesh_detach(struct ieee80211com *ic)
620{
621}
622
623static void
624mesh_vdetach_peers(void *arg, struct ieee80211_node *ni)
625{
626 struct ieee80211com *ic = ni->ni_ic;
627 uint16_t args[3];
628
629 if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED) {
630 args[0] = ni->ni_mlpid;
631 args[1] = ni->ni_mllid;
632 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
633 ieee80211_send_action(ni,
634 IEEE80211_ACTION_CAT_SELF_PROT,
635 IEEE80211_ACTION_MESHPEERING_CLOSE,
636 args);
637 }
638 callout_drain(&ni->ni_mltimer);
639 /* XXX belongs in hwmp */
640 ieee80211_ageq_drain_node(&ic->ic_stageq,
641 (void *)(uintptr_t) ieee80211_mac_hash(ic, ni->ni_macaddr));
642}
643
644static void
645mesh_vdetach(struct ieee80211vap *vap)
646{
647 struct ieee80211_mesh_state *ms = vap->iv_mesh;
648
649 callout_drain(&ms->ms_cleantimer);
650 ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_vdetach_peers,
651 NULL);
652 ieee80211_mesh_rt_flush(vap);
653 mtx_destroy(&ms->ms_rt_lock);
654 ms->ms_ppath->mpp_vdetach(vap);
655 free(vap->iv_mesh, M_80211_VAP);
656 vap->iv_mesh = NULL;
657}
658
659static void
660mesh_vattach(struct ieee80211vap *vap)
661{
662 struct ieee80211_mesh_state *ms;
663 vap->iv_newstate = mesh_newstate;
664 vap->iv_input = mesh_input;
665 vap->iv_opdetach = mesh_vdetach;
666 vap->iv_recv_mgmt = mesh_recv_mgmt;
667 vap->iv_recv_ctl = mesh_recv_ctl;
668 ms = malloc(sizeof(struct ieee80211_mesh_state), M_80211_VAP,
669 M_NOWAIT | M_ZERO);
670 if (ms == NULL) {
671 printf("%s: couldn't alloc MBSS state\n", __func__);
672 return;
673 }
674 vap->iv_mesh = ms;
675 ms->ms_seq = 0;
676 ms->ms_flags = (IEEE80211_MESHFLAGS_AP | IEEE80211_MESHFLAGS_FWD);
677 ms->ms_ttl = IEEE80211_MESH_DEFAULT_TTL;
678 TAILQ_INIT(&ms->ms_known_gates);
679 TAILQ_INIT(&ms->ms_routes);
680 mtx_init(&ms->ms_rt_lock, "MBSS", "802.11s routing table", MTX_DEF);
681 callout_init(&ms->ms_cleantimer, CALLOUT_MPSAFE);
682 callout_init(&ms->ms_gatetimer, CALLOUT_MPSAFE);
683 ms->ms_gateseq = 0;
684 mesh_select_proto_metric(vap, "AIRTIME");
685 KASSERT(ms->ms_pmetric, ("ms_pmetric == NULL"));
686 mesh_select_proto_path(vap, "HWMP");
687 KASSERT(ms->ms_ppath, ("ms_ppath == NULL"));
688 ms->ms_ppath->mpp_vattach(vap);
689}
690
691/*
692 * IEEE80211_M_MBSS vap state machine handler.
693 */
694static int
695mesh_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
696{
697 struct ieee80211_mesh_state *ms = vap->iv_mesh;
698 struct ieee80211com *ic = vap->iv_ic;
699 struct ieee80211_node *ni;
700 enum ieee80211_state ostate;
701
702 IEEE80211_LOCK_ASSERT(ic);
703
704 ostate = vap->iv_state;
705 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n",
706 __func__, ieee80211_state_name[ostate],
707 ieee80211_state_name[nstate], arg);
708 vap->iv_state = nstate; /* state transition */
709 if (ostate != IEEE80211_S_SCAN)
710 ieee80211_cancel_scan(vap); /* background scan */
711 ni = vap->iv_bss; /* NB: no reference held */
712 if (nstate != IEEE80211_S_RUN && ostate == IEEE80211_S_RUN) {
713 callout_drain(&ms->ms_cleantimer);
714 callout_drain(&ms->ms_gatetimer);
715 }
716 switch (nstate) {
717 case IEEE80211_S_INIT:
718 switch (ostate) {
719 case IEEE80211_S_SCAN:
720 ieee80211_cancel_scan(vap);
721 break;
722 case IEEE80211_S_CAC:
723 ieee80211_dfs_cac_stop(vap);
724 break;
725 case IEEE80211_S_RUN:
726 ieee80211_iterate_nodes(&ic->ic_sta,
727 mesh_vdetach_peers, NULL);
728 break;
729 default:
730 break;
731 }
732 if (ostate != IEEE80211_S_INIT) {
733 /* NB: optimize INIT -> INIT case */
734 ieee80211_reset_bss(vap);
735 ieee80211_mesh_rt_flush(vap);
736 }
737 break;
738 case IEEE80211_S_SCAN:
739 switch (ostate) {
740 case IEEE80211_S_INIT:
741 if (vap->iv_des_chan != IEEE80211_CHAN_ANYC &&
742 !IEEE80211_IS_CHAN_RADAR(vap->iv_des_chan) &&
743 ms->ms_idlen != 0) {
744 /*
745 * Already have a channel and a mesh ID; bypass
746 * the scan and startup immediately.
747 */
748 ieee80211_create_ibss(vap, vap->iv_des_chan);
749 break;
750 }
751 /*
752 * Initiate a scan. We can come here as a result
753 * of an IEEE80211_IOC_SCAN_REQ too in which case
754 * the vap will be marked with IEEE80211_FEXT_SCANREQ
755 * and the scan request parameters will be present
756 * in iv_scanreq. Otherwise we do the default.
757 */
758 if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) {
759 ieee80211_check_scan(vap,
760 vap->iv_scanreq_flags,
761 vap->iv_scanreq_duration,
762 vap->iv_scanreq_mindwell,
763 vap->iv_scanreq_maxdwell,
764 vap->iv_scanreq_nssid, vap->iv_scanreq_ssid);
765 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ;
766 } else
767 ieee80211_check_scan_current(vap);
768 break;
769 default:
770 break;
771 }
772 break;
773 case IEEE80211_S_CAC:
774 /*
775 * Start CAC on a DFS channel. We come here when starting
776 * a bss on a DFS channel (see ieee80211_create_ibss).
777 */
778 ieee80211_dfs_cac_start(vap);
779 break;
780 case IEEE80211_S_RUN:
781 switch (ostate) {
782 case IEEE80211_S_INIT:
783 /*
784 * Already have a channel; bypass the
785 * scan and startup immediately.
786 * Note that ieee80211_create_ibss will call
787 * back to do a RUN->RUN state change.
788 */
789 ieee80211_create_ibss(vap,
790 ieee80211_ht_adjust_channel(ic,
791 ic->ic_curchan, vap->iv_flags_ht));
792 /* NB: iv_bss is changed on return */
793 break;
794 case IEEE80211_S_CAC:
795 /*
796 * NB: This is the normal state change when CAC
797 * expires and no radar was detected; no need to
798 * clear the CAC timer as it's already expired.
799 */
800 /* fall thru... */
801 case IEEE80211_S_CSA:
802#if 0
803 /*
804 * Shorten inactivity timer of associated stations
805 * to weed out sta's that don't follow a CSA.
806 */
807 ieee80211_iterate_nodes(&ic->ic_sta, sta_csa, vap);
808#endif
809 /*
810 * Update bss node channel to reflect where
811 * we landed after CSA.
812 */
813 ieee80211_node_set_chan(vap->iv_bss,
814 ieee80211_ht_adjust_channel(ic, ic->ic_curchan,
815 ieee80211_htchanflags(vap->iv_bss->ni_chan)));
816 /* XXX bypass debug msgs */
817 break;
818 case IEEE80211_S_SCAN:
819 case IEEE80211_S_RUN:
820#ifdef IEEE80211_DEBUG
821 if (ieee80211_msg_debug(vap)) {
822 struct ieee80211_node *ni = vap->iv_bss;
823 ieee80211_note(vap,
824 "synchronized with %s meshid ",
825 ether_sprintf(ni->ni_meshid));
826 ieee80211_print_essid(ni->ni_meshid,
827 ni->ni_meshidlen);
828 /* XXX MCS/HT */
829 printf(" channel %d\n",
830 ieee80211_chan2ieee(ic, ic->ic_curchan));
831 }
832#endif
833 break;
834 default:
835 break;
836 }
837 ieee80211_node_authorize(vap->iv_bss);
838 callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact,
839 mesh_rt_cleanup_cb, vap);
840 mesh_gatemode_setup(vap);
841 break;
842 default:
843 break;
844 }
845 /* NB: ostate not nstate */
846 ms->ms_ppath->mpp_newstate(vap, ostate, arg);
847 return 0;
848}
849
850static void
851mesh_rt_cleanup_cb(void *arg)
852{
853 struct ieee80211vap *vap = arg;
854 struct ieee80211_mesh_state *ms = vap->iv_mesh;
855
856 mesh_rt_flush_invalid(vap);
857 callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact,
858 mesh_rt_cleanup_cb, vap);
859}
860
861/*
862 * Mark a mesh STA as gate and return a pointer to it.
863 * If this is first time, we create a new gate route.
864 * Always update the path route to this mesh gate.
865 */
866struct ieee80211_mesh_gate_route *
867ieee80211_mesh_mark_gate(struct ieee80211vap *vap, const uint8_t *addr,
868 struct ieee80211_mesh_route *rt)
869{
870 struct ieee80211_mesh_state *ms = vap->iv_mesh;
871 struct ieee80211_mesh_gate_route *gr = NULL, *next;
872 int found = 0;
873
874 MESH_RT_LOCK(ms);
875 TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) {
876 if (IEEE80211_ADDR_EQ(gr->gr_addr, addr)) {
877 found = 1;
878 break;
879 }
880 }
881
882 if (!found) {
883 /* New mesh gate add it to known table. */
884 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, addr,
885 "%s", "stored new gate information from pro-PREQ.");
886 gr = malloc(ALIGN(sizeof(struct ieee80211_mesh_gate_route)),
887 M_80211_MESH_GT_RT, M_NOWAIT | M_ZERO);
888 IEEE80211_ADDR_COPY(gr->gr_addr, addr);
889 TAILQ_INSERT_TAIL(&ms->ms_known_gates, gr, gr_next);
890 }
891 gr->gr_route = rt;
892 /* TODO: link from path route to gate route */
893 MESH_RT_UNLOCK(ms);
894
895 return gr;
896}
897
898
899/*
900 * Helper function to note the Mesh Peer Link FSM change.
901 */
902static void
903mesh_linkchange(struct ieee80211_node *ni, enum ieee80211_mesh_mlstate state)
904{
905 struct ieee80211vap *vap = ni->ni_vap;
906 struct ieee80211_mesh_state *ms = vap->iv_mesh;
907#ifdef IEEE80211_DEBUG
908 static const char *meshlinkstates[] = {
909 [IEEE80211_NODE_MESH_IDLE] = "IDLE",
910 [IEEE80211_NODE_MESH_OPENSNT] = "OPEN SENT",
911 [IEEE80211_NODE_MESH_OPENRCV] = "OPEN RECEIVED",
912 [IEEE80211_NODE_MESH_CONFIRMRCV] = "CONFIRM RECEIVED",
913 [IEEE80211_NODE_MESH_ESTABLISHED] = "ESTABLISHED",
914 [IEEE80211_NODE_MESH_HOLDING] = "HOLDING"
915 };
916#endif
917 IEEE80211_NOTE(vap, IEEE80211_MSG_MESH,
918 ni, "peer link: %s -> %s",
919 meshlinkstates[ni->ni_mlstate], meshlinkstates[state]);
920
921 /* track neighbor count */
922 if (state == IEEE80211_NODE_MESH_ESTABLISHED &&
923 ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) {
924 KASSERT(ms->ms_neighbors < 65535, ("neighbor count overflow"));
925 ms->ms_neighbors++;
926 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF);
927 } else if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED &&
928 state != IEEE80211_NODE_MESH_ESTABLISHED) {
929 KASSERT(ms->ms_neighbors > 0, ("neighbor count 0"));
930 ms->ms_neighbors--;
931 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF);
932 }
933 ni->ni_mlstate = state;
934 switch (state) {
935 case IEEE80211_NODE_MESH_HOLDING:
936 ms->ms_ppath->mpp_peerdown(ni);
937 break;
938 case IEEE80211_NODE_MESH_ESTABLISHED:
939 ieee80211_mesh_discover(vap, ni->ni_macaddr, NULL);
940 break;
941 default:
942 break;
943 }
944}
945
946/*
947 * Helper function to generate a unique local ID required for mesh
948 * peer establishment.
949 */
950static void
951mesh_checkid(void *arg, struct ieee80211_node *ni)
952{
953 uint16_t *r = arg;
954
955 if (*r == ni->ni_mllid)
956 *(uint16_t *)arg = 0;
957}
958
959static uint32_t
960mesh_generateid(struct ieee80211vap *vap)
961{
962 int maxiter = 4;
963 uint16_t r;
964
965 do {
966 get_random_bytes(&r, 2);
967 ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_checkid, &r);
968 maxiter--;
969 } while (r == 0 && maxiter > 0);
970 return r;
971}
972
973/*
974 * Verifies if we already received this packet by checking its
975 * sequence number.
976 * Returns 0 if the frame is to be accepted, 1 otherwise.
977 */
978static int
979mesh_checkpseq(struct ieee80211vap *vap,
980 const uint8_t source[IEEE80211_ADDR_LEN], uint32_t seq)
981{
982 struct ieee80211_mesh_route *rt;
983
984 rt = ieee80211_mesh_rt_find(vap, source);
985 if (rt == NULL) {
986 rt = ieee80211_mesh_rt_add(vap, source);
987 if (rt == NULL) {
988 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source,
989 "%s", "add mcast route failed");
990 vap->iv_stats.is_mesh_rtaddfailed++;
991 return 1;
992 }
993 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source,
994 "add mcast route, mesh seqno %d", seq);
995 rt->rt_lastmseq = seq;
996 return 0;
997 }
998 if (IEEE80211_MESH_SEQ_GEQ(rt->rt_lastmseq, seq)) {
999 return 1;
1000 } else {
1001 rt->rt_lastmseq = seq;
1002 return 0;
1003 }
1004}
1005
1006/*
1007 * Iterate the routing table and locate the next hop.
1008 */
1009struct ieee80211_node *
1010ieee80211_mesh_find_txnode(struct ieee80211vap *vap,
1011 const uint8_t dest[IEEE80211_ADDR_LEN])
1012{
1013 struct ieee80211_mesh_route *rt;
1014
1015 rt = ieee80211_mesh_rt_find(vap, dest);
1016 if (rt == NULL)
1017 return NULL;
1018 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) {
1019 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
1020 "%s: !valid, flags 0x%x", __func__, rt->rt_flags);
1021 /* XXX stat */
1022 return NULL;
1023 }
1024 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) {
1025 rt = ieee80211_mesh_rt_find(vap, rt->rt_mesh_gate);
1026 if (rt == NULL) return NULL;
1027 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) {
1028 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
1029 "%s: meshgate !valid, flags 0x%x", __func__,
1030 rt->rt_flags);
1031 /* XXX stat */
1032 return NULL;
1033 }
1034 }
1035 return ieee80211_find_txnode(vap, rt->rt_nexthop);
1036}
1037
1038static void
1039mesh_transmit_to_gate(struct ieee80211vap *vap, struct mbuf *m,
1040 struct ieee80211_mesh_route *rt_gate)
1041{
1042 struct ifnet *ifp = vap->iv_ifp;
1043 struct ieee80211_node *ni;
1044
1045 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
1046
1047 ni = ieee80211_mesh_find_txnode(vap, rt_gate->rt_dest);
1048 if (ni == NULL) {
1049 ifp->if_oerrors++;
1050 m_freem(m);
1051 return;
1052 }
1053
1054 /*
1055 * Send through the VAP packet transmit path.
1056 * This consumes the node ref grabbed above and
1057 * the mbuf, regardless of whether there's a problem
1058 * or not.
1059 */
1060 (void) ieee80211_vap_pkt_send_dest(vap, m, ni);
1061}
1062
1063/*
1064 * Forward the queued frames to known valid mesh gates.
1065 * Assume destination to be outside the MBSS (i.e. proxy entry),
1066 * If no valid mesh gates are known silently discard queued frames.
1067 * After transmitting frames to all known valid mesh gates, this route
1068 * will be marked invalid, and a new path discovery will happen in the hopes
1069 * that (at least) one of the mesh gates have a new proxy entry for us to use.
1070 */
1071void
1072ieee80211_mesh_forward_to_gates(struct ieee80211vap *vap,
1073 struct ieee80211_mesh_route *rt_dest)
1074{
1075 struct ieee80211com *ic = vap->iv_ic;
1076 struct ieee80211_mesh_state *ms = vap->iv_mesh;
1077 struct ieee80211_mesh_route *rt_gate;
1078 struct ieee80211_mesh_gate_route *gr = NULL, *gr_next;
1079 struct mbuf *m, *mcopy, *next;
1080
1081 IEEE80211_TX_UNLOCK_ASSERT(ic);
1082
1083 KASSERT( rt_dest->rt_flags == IEEE80211_MESHRT_FLAGS_DISCOVER,
1084 ("Route is not marked with IEEE80211_MESHRT_FLAGS_DISCOVER"));
1085
1086 /* XXX: send to more than one valid mash gate */
1087 MESH_RT_LOCK(ms);
1088
1089 m = ieee80211_ageq_remove(&ic->ic_stageq,
1090 (struct ieee80211_node *)(uintptr_t)
1091 ieee80211_mac_hash(ic, rt_dest->rt_dest));
1092
1093 TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, gr_next) {
1094 rt_gate = gr->gr_route;
1095 if (rt_gate == NULL) {
1096 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP,
1097 rt_dest->rt_dest,
1098 "mesh gate with no path %6D",
1099 gr->gr_addr, ":");
1100 continue;
1101 }
1102 if ((rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0)
1103 continue;
1104 KASSERT(rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_GATE,
1105 ("route not marked as a mesh gate"));
1106 KASSERT((rt_gate->rt_flags &
1107 IEEE80211_MESHRT_FLAGS_PROXY) == 0,
1108 ("found mesh gate that is also marked porxy"));
1109 /*
1110 * convert route to a proxy route gated by the current
1111 * mesh gate, this is needed so encap can built data
1112 * frame with correct address.
1113 */
1114 rt_dest->rt_flags = IEEE80211_MESHRT_FLAGS_PROXY |
1115 IEEE80211_MESHRT_FLAGS_VALID;
1116 rt_dest->rt_ext_seq = 1; /* random value */
1117 IEEE80211_ADDR_COPY(rt_dest->rt_mesh_gate, rt_gate->rt_dest);
1118 IEEE80211_ADDR_COPY(rt_dest->rt_nexthop, rt_gate->rt_nexthop);
1119 rt_dest->rt_metric = rt_gate->rt_metric;
1120 rt_dest->rt_nhops = rt_gate->rt_nhops;
1121 ieee80211_mesh_rt_update(rt_dest, ms->ms_ppath->mpp_inact);
1122 MESH_RT_UNLOCK(ms);
1123 /* XXX: lock?? */
1124 mcopy = m_dup(m, M_NOWAIT);
1125 for (; mcopy != NULL; mcopy = next) {
1126 next = mcopy->m_nextpkt;
1127 mcopy->m_nextpkt = NULL;
1128 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP,
1129 rt_dest->rt_dest,
1130 "flush queued frame %p len %d", mcopy,
1131 mcopy->m_pkthdr.len);
1132 mesh_transmit_to_gate(vap, mcopy, rt_gate);
1133 }
1134 MESH_RT_LOCK(ms);
1135 }
1136 rt_dest->rt_flags = 0; /* Mark invalid */
1137 m_freem(m);
1138 MESH_RT_UNLOCK(ms);
1139}
1140
1141/*
1142 * Forward the specified frame.
1143 * Decrement the TTL and set TA to our MAC address.
1144 */
1145static void
1146mesh_forward(struct ieee80211vap *vap, struct mbuf *m,
1147 const struct ieee80211_meshcntl *mc)
1148{
1149 struct ieee80211com *ic = vap->iv_ic;
1150 struct ieee80211_mesh_state *ms = vap->iv_mesh;
1151 struct ifnet *ifp = vap->iv_ifp;
1152 const struct ieee80211_frame *wh =
1153 mtod(m, const struct ieee80211_frame *);
1154 struct mbuf *mcopy;
1155 struct ieee80211_meshcntl *mccopy;
1156 struct ieee80211_frame *whcopy;
1157 struct ieee80211_node *ni;
1158 int err;
1159
1160 /* This is called from the RX path - don't hold this lock */
1161 IEEE80211_TX_UNLOCK_ASSERT(ic);
1162
1163 /*
1164 * mesh ttl of 1 means we are the last one receving it,
1165 * according to amendment we decrement and then check if
1166 * 0, if so we dont forward.
1167 */
1168 if (mc->mc_ttl < 1) {
1169 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1170 "%s", "frame not fwd'd, ttl 1");
1171 vap->iv_stats.is_mesh_fwd_ttl++;
1172 return;
1173 }
1174 if (!(ms->ms_flags & IEEE80211_MESHFLAGS_FWD)) {
1175 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1176 "%s", "frame not fwd'd, fwding disabled");
1177 vap->iv_stats.is_mesh_fwd_disabled++;
1178 return;
1179 }
1180 mcopy = m_dup(m, M_NOWAIT);
1181 if (mcopy == NULL) {
1182 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1183 "%s", "frame not fwd'd, cannot dup");
1184 vap->iv_stats.is_mesh_fwd_nobuf++;
1185 ifp->if_oerrors++;
1186 return;
1187 }
1188 mcopy = m_pullup(mcopy, ieee80211_hdrspace(ic, wh) +
1189 sizeof(struct ieee80211_meshcntl));
1190 if (mcopy == NULL) {
1191 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1192 "%s", "frame not fwd'd, too short");
1193 vap->iv_stats.is_mesh_fwd_tooshort++;
1194 ifp->if_oerrors++;
1195 m_freem(mcopy);
1196 return;
1197 }
1198 whcopy = mtod(mcopy, struct ieee80211_frame *);
1199 mccopy = (struct ieee80211_meshcntl *)
1200 (mtod(mcopy, uint8_t *) + ieee80211_hdrspace(ic, wh));
1201 /* XXX clear other bits? */
1202 whcopy->i_fc[1] &= ~IEEE80211_FC1_RETRY;
1203 IEEE80211_ADDR_COPY(whcopy->i_addr2, vap->iv_myaddr);
1204 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1205 ni = ieee80211_ref_node(vap->iv_bss);
1206 mcopy->m_flags |= M_MCAST;
1207 } else {
1208 ni = ieee80211_mesh_find_txnode(vap, whcopy->i_addr3);
1209 if (ni == NULL) {
1210 /*
1211 * [Optional] any of the following three actions:
1212 * o silently discard
1213 * o trigger a path discovery
1214 * o inform TA that meshDA is unknown.
1215 */
1216 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1217 "%s", "frame not fwd'd, no path");
1218 ms->ms_ppath->mpp_senderror(vap, whcopy->i_addr3, NULL,
1219 IEEE80211_REASON_MESH_PERR_NO_FI);
1220 vap->iv_stats.is_mesh_fwd_nopath++;
1221 m_freem(mcopy);
1222 return;
1223 }
1224 IEEE80211_ADDR_COPY(whcopy->i_addr1, ni->ni_macaddr);
1225 }
1226 KASSERT(mccopy->mc_ttl > 0, ("%s called with wrong ttl", __func__));
1227 mccopy->mc_ttl--;
1228
1229 /* XXX calculate priority so drivers can find the tx queue */
1230 M_WME_SETAC(mcopy, WME_AC_BE);
1231
1232 /* XXX do we know m_nextpkt is NULL? */
1233 mcopy->m_pkthdr.rcvif = (void *) ni;
1234
1235 /*
1236 * XXX this bypasses all of the VAP TX handling; it passes frames
1237 * directly to the parent interface.
1238 *
1239 * Because of this, there's no TX lock being held as there's no
1240 * encaps state being used.
1241 *
1242 * Doing a direct parent transmit may not be the correct thing
1243 * to do here; we'll have to re-think this soon.
1244 */
1245 IEEE80211_TX_LOCK(ic);
1246 err = ieee80211_parent_xmitpkt(ic, mcopy);
1247 IEEE80211_TX_UNLOCK(ic);
1248 if (err != 0) {
1249 /* NB: IFQ_HANDOFF reclaims mbuf */
1250 ieee80211_free_node(ni);
1251 } else {
1252 ifp->if_opackets++;
1253 }
1254}
1255
1256static struct mbuf *
1257mesh_decap(struct ieee80211vap *vap, struct mbuf *m, int hdrlen, int meshdrlen)
1258{
1259#define WHDIR(wh) ((wh)->i_fc[1] & IEEE80211_FC1_DIR_MASK)
1260#define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc)
1261 uint8_t b[sizeof(struct ieee80211_qosframe_addr4) +
1262 sizeof(struct ieee80211_meshcntl_ae10)];
1263 const struct ieee80211_qosframe_addr4 *wh;
1264 const struct ieee80211_meshcntl_ae10 *mc;
1265 struct ether_header *eh;
1266 struct llc *llc;
1267 int ae;
1268
1269 if (m->m_len < hdrlen + sizeof(*llc) &&
1270 (m = m_pullup(m, hdrlen + sizeof(*llc))) == NULL) {
1271 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ANY,
1272 "discard data frame: %s", "m_pullup failed");
1273 vap->iv_stats.is_rx_tooshort++;
1274 return NULL;
1275 }
1276 memcpy(b, mtod(m, caddr_t), hdrlen);
1277 wh = (const struct ieee80211_qosframe_addr4 *)&b[0];
1278 mc = (const struct ieee80211_meshcntl_ae10 *)&b[hdrlen - meshdrlen];
1279 KASSERT(WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS ||
1280 WHDIR(wh) == IEEE80211_FC1_DIR_DSTODS,
1281 ("bogus dir, fc 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1]));
1282
1283 llc = (struct llc *)(mtod(m, caddr_t) + hdrlen);
1284 if (llc->llc_dsap == LLC_SNAP_LSAP && llc->llc_ssap == LLC_SNAP_LSAP &&
1285 llc->llc_control == LLC_UI && llc->llc_snap.org_code[0] == 0 &&
1286 llc->llc_snap.org_code[1] == 0 && llc->llc_snap.org_code[2] == 0 &&
1287 /* NB: preserve AppleTalk frames that have a native SNAP hdr */
1288 !(llc->llc_snap.ether_type == htons(ETHERTYPE_AARP) ||
1289 llc->llc_snap.ether_type == htons(ETHERTYPE_IPX))) {
1290 m_adj(m, hdrlen + sizeof(struct llc) - sizeof(*eh));
1291 llc = NULL;
1292 } else {
1293 m_adj(m, hdrlen - sizeof(*eh));
1294 }
1295 eh = mtod(m, struct ether_header *);
1296 ae = mc->mc_flags & IEEE80211_MESH_AE_MASK;
1297 if (WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS) {
1298 IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr1);
1299 if (ae == IEEE80211_MESH_AE_00) {
1300 IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr3);
1301 } else if (ae == IEEE80211_MESH_AE_01) {
1302 IEEE80211_ADDR_COPY(eh->ether_shost,
1303 MC01(mc)->mc_addr4);
1304 } else {
1305 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1306 (const struct ieee80211_frame *)wh, NULL,
1307 "bad AE %d", ae);
1308 vap->iv_stats.is_mesh_badae++;
1309 m_freem(m);
1310 return NULL;
1311 }
1312 } else {
1313 if (ae == IEEE80211_MESH_AE_00) {
1314 IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr3);
1315 IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr4);
1316 } else if (ae == IEEE80211_MESH_AE_10) {
1317 IEEE80211_ADDR_COPY(eh->ether_dhost, mc->mc_addr5);
1318 IEEE80211_ADDR_COPY(eh->ether_shost, mc->mc_addr6);
1319 } else {
1320 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1321 (const struct ieee80211_frame *)wh, NULL,
1322 "bad AE %d", ae);
1323 vap->iv_stats.is_mesh_badae++;
1324 m_freem(m);
1325 return NULL;
1326 }
1327 }
1328#ifndef __NO_STRICT_ALIGNMENT
1329 if (!ALIGNED_POINTER(mtod(m, caddr_t) + sizeof(*eh), uint32_t)) {
1330 m = ieee80211_realign(vap, m, sizeof(*eh));
1331 if (m == NULL)
1332 return NULL;
1333 }
1334#endif /* !__NO_STRICT_ALIGNMENT */
1335 if (llc != NULL) {
1336 eh = mtod(m, struct ether_header *);
1337 eh->ether_type = htons(m->m_pkthdr.len - sizeof(*eh));
1338 }
1339 return m;
1340#undef WDIR
1341#undef MC01
1342}
1343
1344/*
1345 * Return non-zero if the unicast mesh data frame should be processed
1346 * locally. Frames that are not proxy'd have our address, otherwise
1347 * we need to consult the routing table to look for a proxy entry.
1348 */
1349static __inline int
1350mesh_isucastforme(struct ieee80211vap *vap, const struct ieee80211_frame *wh,
1351 const struct ieee80211_meshcntl *mc)
1352{
1353 int ae = mc->mc_flags & 3;
1354
1355 KASSERT((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) == IEEE80211_FC1_DIR_DSTODS,
1356 ("bad dir 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1]));
1357 KASSERT(ae == IEEE80211_MESH_AE_00 || ae == IEEE80211_MESH_AE_10,
1358 ("bad AE %d", ae));
1359 if (ae == IEEE80211_MESH_AE_10) { /* ucast w/ proxy */
1360 const struct ieee80211_meshcntl_ae10 *mc10 =
1361 (const struct ieee80211_meshcntl_ae10 *) mc;
1362 struct ieee80211_mesh_route *rt =
1363 ieee80211_mesh_rt_find(vap, mc10->mc_addr5);
1364 /* check for proxy route to ourself */
1365 return (rt != NULL &&
1366 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY));
1367 } else /* ucast w/o proxy */
1368 return IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_myaddr);
1369}
1370
1371/*
1372 * Verifies transmitter, updates lifetime, precursor list and forwards data.
1373 * > 0 means we have forwarded data and no need to process locally
1374 * == 0 means we want to process locally (and we may have forwarded data
1375 * < 0 means there was an error and data should be discarded
1376 */
1377static int
1378mesh_recv_indiv_data_to_fwrd(struct ieee80211vap *vap, struct mbuf *m,
1379 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc)
1380{
1381 struct ieee80211_qosframe_addr4 *qwh;
1382 struct ieee80211_mesh_state *ms = vap->iv_mesh;
1383 struct ieee80211_mesh_route *rt_meshda, *rt_meshsa;
1384
1385 /* This is called from the RX path - don't hold this lock */
1386 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
1387
1388 qwh = (struct ieee80211_qosframe_addr4 *)wh;
1389
1390 /*
1391 * TODO:
1392 * o verify addr2 is a legitimate transmitter
1393 * o lifetime of precursor of addr3 (addr2) is max(init, curr)
1394 * o lifetime of precursor of addr4 (nexthop) is max(init, curr)
1395 */
1396
1397 /* set lifetime of addr3 (meshDA) to initial value */
1398 rt_meshda = ieee80211_mesh_rt_find(vap, qwh->i_addr3);
1399 if (rt_meshda == NULL) {
1400 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, qwh->i_addr2,
1401 "no route to meshDA(%6D)", qwh->i_addr3, ":");
1402 /*
1403 * [Optional] any of the following three actions:
1404 * o silently discard [X]
1405 * o trigger a path discovery [ ]
1406 * o inform TA that meshDA is unknown. [ ]
1407 */
1408 /* XXX: stats */
1409 return (-1);
1410 }
1411
1412 ieee80211_mesh_rt_update(rt_meshda, ticks_to_msecs(
1413 ms->ms_ppath->mpp_inact));
1414
1415 /* set lifetime of addr4 (meshSA) to initial value */
1416 rt_meshsa = ieee80211_mesh_rt_find(vap, qwh->i_addr4);
1417 KASSERT(rt_meshsa != NULL, ("no route"));
1418 ieee80211_mesh_rt_update(rt_meshsa, ticks_to_msecs(
1419 ms->ms_ppath->mpp_inact));
1420
1421 mesh_forward(vap, m, mc);
1422 return (1); /* dont process locally */
1423}
1424
1425/*
1426 * Verifies transmitter, updates lifetime, precursor list and process data
1427 * locally, if data is proxy with AE = 10 it could mean data should go
1428 * on another mesh path or data should be forwarded to the DS.
1429 *
1430 * > 0 means we have forwarded data and no need to process locally
1431 * == 0 means we want to process locally (and we may have forwarded data
1432 * < 0 means there was an error and data should be discarded
1433 */
1434static int
1435mesh_recv_indiv_data_to_me(struct ieee80211vap *vap, struct mbuf *m,
1436 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc)
1437{
1438 struct ieee80211_qosframe_addr4 *qwh;
1439 const struct ieee80211_meshcntl_ae10 *mc10;
1440 struct ieee80211_mesh_state *ms = vap->iv_mesh;
1441 struct ieee80211_mesh_route *rt;
1442 int ae;
1443
1444 /* This is called from the RX path - don't hold this lock */
1445 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
1446
1447 qwh = (struct ieee80211_qosframe_addr4 *)wh;
1448 mc10 = (const struct ieee80211_meshcntl_ae10 *)mc;
1449
1450 /*
1451 * TODO:
1452 * o verify addr2 is a legitimate transmitter
1453 * o lifetime of precursor entry is max(init, curr)
1454 */
1455
1456 /* set lifetime of addr4 (meshSA) to initial value */
1457 rt = ieee80211_mesh_rt_find(vap, qwh->i_addr4);
1458 KASSERT(rt != NULL, ("no route"));
1459 ieee80211_mesh_rt_update(rt, ticks_to_msecs(ms->ms_ppath->mpp_inact));
1460 rt = NULL;
1461
1462 ae = mc10->mc_flags & IEEE80211_MESH_AE_MASK;
1463 KASSERT(ae == IEEE80211_MESH_AE_00 ||
1464 ae == IEEE80211_MESH_AE_10, ("bad AE %d", ae));
1465 if (ae == IEEE80211_MESH_AE_10) {
1466 if (IEEE80211_ADDR_EQ(mc10->mc_addr5, qwh->i_addr3)) {
1467 return (0); /* process locally */
1468 }
1469
1470 rt = ieee80211_mesh_rt_find(vap, mc10->mc_addr5);
1471 if (rt != NULL &&
1472 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) &&
1473 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) == 0) {
1474 /*
1475 * Forward on another mesh-path, according to
1476 * amendment as specified in 9.32.4.1
1477 */
1478 IEEE80211_ADDR_COPY(qwh->i_addr3, mc10->mc_addr5);
1479 mesh_forward(vap, m,
1480 (const struct ieee80211_meshcntl *)mc10);
1481 return (1); /* dont process locally */
1482 }
1483 /*
1484 * All other cases: forward of MSDUs from the MBSS to DS indiv.
1485 * addressed according to 13.11.3.2.
1486 */
1487 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, qwh->i_addr2,
1488 "forward frame to DS, SA(%6D) DA(%6D)",
1489 mc10->mc_addr6, ":", mc10->mc_addr5, ":");
1490 }
1491 return (0); /* process locally */
1492}
1493
1494/*
1495 * Try to forward the group addressed data on to other mesh STAs, and
1496 * also to the DS.
1497 *
1498 * > 0 means we have forwarded data and no need to process locally
1499 * == 0 means we want to process locally (and we may have forwarded data
1500 * < 0 means there was an error and data should be discarded
1501 */
1502static int
1503mesh_recv_group_data(struct ieee80211vap *vap, struct mbuf *m,
1504 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc)
1505{
1506#define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc)
1507 struct ieee80211_mesh_state *ms = vap->iv_mesh;
1508
1509 /* This is called from the RX path - don't hold this lock */
1510 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
1511
1512 mesh_forward(vap, m, mc);
1513
1514 if(mc->mc_ttl > 0) {
1515 if (mc->mc_flags & IEEE80211_MESH_AE_01) {
1516 /*
1517 * Forward of MSDUs from the MBSS to DS group addressed
1518 * (according to 13.11.3.2)
1519 * This happens by delivering the packet, and a bridge
1520 * will sent it on another port member.
1521 */
1522 if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE &&
1523 ms->ms_flags & IEEE80211_MESHFLAGS_FWD)
1524 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH,
1525 MC01(mc)->mc_addr4, "%s",
1526 "forward from MBSS to the DS");
1527 }
1528 }
1529 return (0); /* process locally */
1530#undef MC01
1531}
1532
1533static int
1534mesh_input(struct ieee80211_node *ni, struct mbuf *m, int rssi, int nf)
1535{
1536#define HAS_SEQ(type) ((type & 0x4) == 0)
1537#define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc)
1538#define MC10(mc) ((const struct ieee80211_meshcntl_ae10 *)mc)
1539 struct ieee80211vap *vap = ni->ni_vap;
1540 struct ieee80211com *ic = ni->ni_ic;
1541 struct ifnet *ifp = vap->iv_ifp;
1542 struct ieee80211_frame *wh;
1543 const struct ieee80211_meshcntl *mc;
1544 int hdrspace, meshdrlen, need_tap, error;
1545 uint8_t dir, type, subtype, ae;
1546 uint32_t seq;
1547 const uint8_t *addr;
1548 uint8_t qos[2];
1549 ieee80211_seq rxseq;
1550
1551 KASSERT(ni != NULL, ("null node"));
1552 ni->ni_inact = ni->ni_inact_reload;
1553
1554 need_tap = 1; /* mbuf need to be tapped. */
1555 type = -1; /* undefined */
1556
1557 /* This is called from the RX path - don't hold this lock */
1558 IEEE80211_TX_UNLOCK_ASSERT(ic);
1559
1560 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) {
1561 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1562 ni->ni_macaddr, NULL,
1563 "too short (1): len %u", m->m_pkthdr.len);
1564 vap->iv_stats.is_rx_tooshort++;
1565 goto out;
1566 }
1567 /*
1568 * Bit of a cheat here, we use a pointer for a 3-address
1569 * frame format but don't reference fields past outside
1570 * ieee80211_frame_min w/o first validating the data is
1571 * present.
1572 */
1573 wh = mtod(m, struct ieee80211_frame *);
1574
1575 if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) !=
1576 IEEE80211_FC0_VERSION_0) {
1577 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1578 ni->ni_macaddr, NULL, "wrong version %x", wh->i_fc[0]);
1579 vap->iv_stats.is_rx_badversion++;
1580 goto err;
1581 }
1582 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK;
1583 type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK;
1584 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK;
1585 if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) {
1586 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi);
1587 ni->ni_noise = nf;
1588 if (HAS_SEQ(type)) {
1589 uint8_t tid = ieee80211_gettid(wh);
1590
1591 if (IEEE80211_QOS_HAS_SEQ(wh) &&
1592 TID_TO_WME_AC(tid) >= WME_AC_VI)
1593 ic->ic_wme.wme_hipri_traffic++;
1594 rxseq = le16toh(*(uint16_t *)wh->i_seq);
1595 if (! ieee80211_check_rxseq(ni, wh)) {
1596 /* duplicate, discard */
1597 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
1598 wh->i_addr1, "duplicate",
1599 "seqno <%u,%u> fragno <%u,%u> tid %u",
1600 rxseq >> IEEE80211_SEQ_SEQ_SHIFT,
1601 ni->ni_rxseqs[tid] >>
1602 IEEE80211_SEQ_SEQ_SHIFT,
1603 rxseq & IEEE80211_SEQ_FRAG_MASK,
1604 ni->ni_rxseqs[tid] &
1605 IEEE80211_SEQ_FRAG_MASK,
1606 tid);
1607 vap->iv_stats.is_rx_dup++;
1608 IEEE80211_NODE_STAT(ni, rx_dup);
1609 goto out;
1610 }
1611 ni->ni_rxseqs[tid] = rxseq;
1612 }
1613 }
1614#ifdef IEEE80211_DEBUG
1615 /*
1616 * It's easier, but too expensive, to simulate different mesh
1617 * topologies by consulting the ACL policy very early, so do this
1618 * only under DEBUG.
1619 *
1620 * NB: this check is also done upon peering link initiation.
1621 */
1622 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) {
1623 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL,
1624 wh, NULL, "%s", "disallowed by ACL");
1625 vap->iv_stats.is_rx_acl++;
1626 goto out;
1627 }
1628#endif
1629 switch (type) {
1630 case IEEE80211_FC0_TYPE_DATA:
1631 if (ni == vap->iv_bss)
1632 goto out;
1633 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) {
1634 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
1635 ni->ni_macaddr, NULL,
1636 "peer link not yet established (%d)",
1637 ni->ni_mlstate);
1638 vap->iv_stats.is_mesh_nolink++;
1639 goto out;
1640 }
1641 if (dir != IEEE80211_FC1_DIR_FROMDS &&
1642 dir != IEEE80211_FC1_DIR_DSTODS) {
1643 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1644 wh, "data", "incorrect dir 0x%x", dir);
1645 vap->iv_stats.is_rx_wrongdir++;
1646 goto err;
1647 }
1648
1649 /* All Mesh data frames are QoS subtype */
1650 if (!HAS_SEQ(type)) {
1651 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1652 wh, "data", "incorrect subtype 0x%x", subtype);
1653 vap->iv_stats.is_rx_badsubtype++;
1654 goto err;
1655 }
1656
1657 /*
1658 * Next up, any fragmentation.
1659 * XXX: we defrag before we even try to forward,
1660 * Mesh Control field is not present in sub-sequent
1661 * fragmented frames. This is in contrast to Draft 4.0.
1662 */
1663 hdrspace = ieee80211_hdrspace(ic, wh);
1664 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1665 m = ieee80211_defrag(ni, m, hdrspace);
1666 if (m == NULL) {
1667 /* Fragment dropped or frame not complete yet */
1668 goto out;
1669 }
1670 }
1671 wh = mtod(m, struct ieee80211_frame *); /* NB: after defrag */
1672
1673 /*
1674 * Now we have a complete Mesh Data frame.
1675 */
1676
1677 /*
1678 * Only fromDStoDS data frames use 4 address qos frames
1679 * as specified in amendment. Otherwise addr4 is located
1680 * in the Mesh Control field and a 3 address qos frame
1681 * is used.
1682 */
1683 if (IEEE80211_IS_DSTODS(wh))
1684 *(uint16_t *)qos = *(uint16_t *)
1685 ((struct ieee80211_qosframe_addr4 *)wh)->i_qos;
1686 else
1687 *(uint16_t *)qos = *(uint16_t *)
1688 ((struct ieee80211_qosframe *)wh)->i_qos;
1689
1690 /*
1691 * NB: The mesh STA sets the Mesh Control Present
1692 * subfield to 1 in the Mesh Data frame containing
1693 * an unfragmented MSDU, an A-MSDU, or the first
1694 * fragment of an MSDU.
1695 * After defrag it should always be present.
1696 */
1697 if (!(qos[1] & IEEE80211_QOS_MC)) {
1698 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
1699 ni->ni_macaddr, NULL,
1700 "%s", "Mesh control field not present");
1701 vap->iv_stats.is_rx_elem_missing++; /* XXX: kinda */
1702 goto err;
1703 }
1704
1705 /* pull up enough to get to the mesh control */
1706 if (m->m_len < hdrspace + sizeof(struct ieee80211_meshcntl) &&
1707 (m = m_pullup(m, hdrspace +
1708 sizeof(struct ieee80211_meshcntl))) == NULL) {
1709 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1710 ni->ni_macaddr, NULL,
1711 "data too short: expecting %u", hdrspace);
1712 vap->iv_stats.is_rx_tooshort++;
1713 goto out; /* XXX */
1714 }
1715 /*
1716 * Now calculate the full extent of the headers. Note
1717 * mesh_decap will pull up anything we didn't get
1718 * above when it strips the 802.11 headers.
1719 */
1720 mc = (const struct ieee80211_meshcntl *)
1721 (mtod(m, const uint8_t *) + hdrspace);
1722 ae = mc->mc_flags & IEEE80211_MESH_AE_MASK;
1723 meshdrlen = sizeof(struct ieee80211_meshcntl) +
1724 ae * IEEE80211_ADDR_LEN;
1725 hdrspace += meshdrlen;
1726
1727 /* pull complete hdrspace = ieee80211_hdrspace + meshcontrol */
1728 if ((meshdrlen > sizeof(struct ieee80211_meshcntl)) &&
1729 (m->m_len < hdrspace) &&
1730 ((m = m_pullup(m, hdrspace)) == NULL)) {
1731 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1732 ni->ni_macaddr, NULL,
1733 "data too short: expecting %u", hdrspace);
1734 vap->iv_stats.is_rx_tooshort++;
1735 goto out; /* XXX */
1736 }
1737 /* XXX: are we sure there is no reallocating after m_pullup? */
1738
1739 seq = LE_READ_4(mc->mc_seq);
1740 if (IEEE80211_IS_MULTICAST(wh->i_addr1))
1741 addr = wh->i_addr3;
1742 else if (ae == IEEE80211_MESH_AE_01)
1743 addr = MC01(mc)->mc_addr4;
1744 else
1745 addr = ((struct ieee80211_qosframe_addr4 *)wh)->i_addr4;
1746 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, addr)) {
1747 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
1748 addr, "data", "%s", "not to me");
1749 vap->iv_stats.is_rx_wrongbss++; /* XXX kinda */
1750 goto out;
1751 }
1752 if (mesh_checkpseq(vap, addr, seq) != 0) {
1753 vap->iv_stats.is_rx_dup++;
1754 goto out;
1755 }
1756
1757 /* This code "routes" the frame to the right control path */
1758 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1759 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr3))
1760 error =
1761 mesh_recv_indiv_data_to_me(vap, m, wh, mc);
1762 else if (IEEE80211_IS_MULTICAST(wh->i_addr3))
1763 error = mesh_recv_group_data(vap, m, wh, mc);
1764 else
1765 error = mesh_recv_indiv_data_to_fwrd(vap, m,
1766 wh, mc);
1767 } else
1768 error = mesh_recv_group_data(vap, m, wh, mc);
1769 if (error < 0)
1770 goto err;
1771 else if (error > 0)
1772 goto out;
1773
1774 if (ieee80211_radiotap_active_vap(vap))
1775 ieee80211_radiotap_rx(vap, m);
1776 need_tap = 0;
1777
1778 /*
1779 * Finally, strip the 802.11 header.
1780 */
1781 m = mesh_decap(vap, m, hdrspace, meshdrlen);
1782 if (m == NULL) {
1783 /* XXX mask bit to check for both */
1784 /* don't count Null data frames as errors */
1785 if (subtype == IEEE80211_FC0_SUBTYPE_NODATA ||
1786 subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL)
1787 goto out;
1788 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
1789 ni->ni_macaddr, "data", "%s", "decap error");
1790 vap->iv_stats.is_rx_decap++;
1791 IEEE80211_NODE_STAT(ni, rx_decap);
1792 goto err;
1793 }
1794 if (qos[0] & IEEE80211_QOS_AMSDU) {
1795 m = ieee80211_decap_amsdu(ni, m);
1796 if (m == NULL)
1797 return IEEE80211_FC0_TYPE_DATA;
1798 }
1799 ieee80211_deliver_data(vap, ni, m);
1800 return type;
1801 case IEEE80211_FC0_TYPE_MGT:
1802 vap->iv_stats.is_rx_mgmt++;
1803 IEEE80211_NODE_STAT(ni, rx_mgmt);
1804 if (dir != IEEE80211_FC1_DIR_NODS) {
1805 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1806 wh, "mgt", "incorrect dir 0x%x", dir);
1807 vap->iv_stats.is_rx_wrongdir++;
1808 goto err;
1809 }
1810 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) {
1811 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1812 ni->ni_macaddr, "mgt", "too short: len %u",
1813 m->m_pkthdr.len);
1814 vap->iv_stats.is_rx_tooshort++;
1815 goto out;
1816 }
1817#ifdef IEEE80211_DEBUG
1818 if ((ieee80211_msg_debug(vap) &&
1819 (vap->iv_ic->ic_flags & IEEE80211_F_SCAN)) ||
1820 ieee80211_msg_dumppkts(vap)) {
1821 if_printf(ifp, "received %s from %s rssi %d\n",
1822 ieee80211_mgt_subtype_name[subtype >>
1823 IEEE80211_FC0_SUBTYPE_SHIFT],
1824 ether_sprintf(wh->i_addr2), rssi);
1825 }
1826#endif
1827 if (wh->i_fc[1] & IEEE80211_FC1_WEP) {
1828 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1829 wh, NULL, "%s", "WEP set but not permitted");
1830 vap->iv_stats.is_rx_mgtdiscard++; /* XXX */
1831 goto out;
1832 }
1833 vap->iv_recv_mgmt(ni, m, subtype, rssi, nf);
1834 goto out;
1835 case IEEE80211_FC0_TYPE_CTL:
1836 vap->iv_stats.is_rx_ctl++;
1837 IEEE80211_NODE_STAT(ni, rx_ctrl);
1838 goto out;
1839 default:
1840 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1841 wh, "bad", "frame type 0x%x", type);
1842 /* should not come here */
1843 break;
1844 }
1845err:
1846 ifp->if_ierrors++;
1847out:
1848 if (m != NULL) {
1849 if (need_tap && ieee80211_radiotap_active_vap(vap))
1850 ieee80211_radiotap_rx(vap, m);
1851 m_freem(m);
1852 }
1853 return type;
1854#undef HAS_SEQ
1855#undef MC01
1856#undef MC10
1857}
1858
1859static void
1860mesh_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, int subtype,
1861 int rssi, int nf)
1862{
1863 struct ieee80211vap *vap = ni->ni_vap;
1864 struct ieee80211_mesh_state *ms = vap->iv_mesh;
1865 struct ieee80211com *ic = ni->ni_ic;
1866 struct ieee80211_frame *wh;
1867 struct ieee80211_mesh_route *rt;
1868 uint8_t *frm, *efrm;
1869
1870 wh = mtod(m0, struct ieee80211_frame *);
1871 frm = (uint8_t *)&wh[1];
1872 efrm = mtod(m0, uint8_t *) + m0->m_len;
1873 switch (subtype) {
1874 case IEEE80211_FC0_SUBTYPE_PROBE_RESP:
1875 case IEEE80211_FC0_SUBTYPE_BEACON:
1876 {
1877 struct ieee80211_scanparams scan;
1878 /*
1879 * We process beacon/probe response
1880 * frames to discover neighbors.
1881 */
1882 if (ieee80211_parse_beacon(ni, m0, &scan) != 0)
1883 return;
1884 /*
1885 * Count frame now that we know it's to be processed.
1886 */
1887 if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) {
1888 vap->iv_stats.is_rx_beacon++; /* XXX remove */
1889 IEEE80211_NODE_STAT(ni, rx_beacons);
1890 } else
1891 IEEE80211_NODE_STAT(ni, rx_proberesp);
1892 /*
1893 * If scanning, just pass information to the scan module.
1894 */
1895 if (ic->ic_flags & IEEE80211_F_SCAN) {
1896 if (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN) {
1897 /*
1898 * Actively scanning a channel marked passive;
1899 * send a probe request now that we know there
1900 * is 802.11 traffic present.
1901 *
1902 * XXX check if the beacon we recv'd gives
1903 * us what we need and suppress the probe req
1904 */
1905 ieee80211_probe_curchan(vap, 1);
1906 ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN;
1907 }
1908 ieee80211_add_scan(vap, &scan, wh,
1909 subtype, rssi, nf);
1910 return;
1911 }
1912
1913 /* The rest of this code assumes we are running */
1914 if (vap->iv_state != IEEE80211_S_RUN)
1915 return;
1916 /*
1917 * Ignore non-mesh STAs.
1918 */
1919 if ((scan.capinfo &
1920 (IEEE80211_CAPINFO_ESS|IEEE80211_CAPINFO_IBSS)) ||
1921 scan.meshid == NULL || scan.meshconf == NULL) {
1922 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1923 wh, "beacon", "%s", "not a mesh sta");
1924 vap->iv_stats.is_mesh_wrongmesh++;
1925 return;
1926 }
1927 /*
1928 * Ignore STAs for other mesh networks.
1929 */
1930 if (memcmp(scan.meshid+2, ms->ms_id, ms->ms_idlen) != 0 ||
1931 mesh_verify_meshconf(vap, scan.meshconf)) {
1932 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1933 wh, "beacon", "%s", "not for our mesh");
1934 vap->iv_stats.is_mesh_wrongmesh++;
1935 return;
1936 }
1937 /*
1938 * Peer only based on the current ACL policy.
1939 */
1940 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) {
1941 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL,
1942 wh, NULL, "%s", "disallowed by ACL");
1943 vap->iv_stats.is_rx_acl++;
1944 return;
1945 }
1946 /*
1947 * Do neighbor discovery.
1948 */
1949 if (!IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_macaddr)) {
1950 /*
1951 * Create a new entry in the neighbor table.
1952 */
1953 ni = ieee80211_add_neighbor(vap, wh, &scan);
1954 }
1955 /*
1956 * Automatically peer with discovered nodes if possible.
1957 */
1958 if (ni != vap->iv_bss &&
1959 (ms->ms_flags & IEEE80211_MESHFLAGS_AP)) {
1960 switch (ni->ni_mlstate) {
1961 case IEEE80211_NODE_MESH_IDLE:
1962 {
1963 uint16_t args[1];
1964
1965 /* Wait for backoff callout to reset counter */
1966 if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding)
1967 return;
1968
1969 ni->ni_mlpid = mesh_generateid(vap);
1970 if (ni->ni_mlpid == 0)
1971 return;
1972 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENSNT);
1973 args[0] = ni->ni_mlpid;
1974 ieee80211_send_action(ni,
1975 IEEE80211_ACTION_CAT_SELF_PROT,
1976 IEEE80211_ACTION_MESHPEERING_OPEN, args);
1977 ni->ni_mlrcnt = 0;
1978 mesh_peer_timeout_setup(ni);
1979 break;
1980 }
1981 case IEEE80211_NODE_MESH_ESTABLISHED:
1982 {
1983 /*
1984 * Valid beacon from a peer mesh STA
1985 * bump TA lifetime
1986 */
1987 rt = ieee80211_mesh_rt_find(vap, wh->i_addr2);
1988 if(rt != NULL) {
1989 ieee80211_mesh_rt_update(rt,
1990 ticks_to_msecs(
1991 ms->ms_ppath->mpp_inact));
1992 }
1993 break;
1994 }
1995 default:
1996 break; /* ignore */
1997 }
1998 }
1999 break;
2000 }
2001 case IEEE80211_FC0_SUBTYPE_PROBE_REQ:
2002 {
2003 uint8_t *ssid, *meshid, *rates, *xrates;
2004 uint8_t *sfrm;
2005
2006 if (vap->iv_state != IEEE80211_S_RUN) {
2007 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2008 wh, NULL, "wrong state %s",
2009 ieee80211_state_name[vap->iv_state]);
2010 vap->iv_stats.is_rx_mgtdiscard++;
2011 return;
2012 }
2013 if (IEEE80211_IS_MULTICAST(wh->i_addr2)) {
2014 /* frame must be directed */
2015 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2016 wh, NULL, "%s", "not unicast");
2017 vap->iv_stats.is_rx_mgtdiscard++; /* XXX stat */
2018 return;
2019 }
2020 /*
2021 * prreq frame format
2022 * [tlv] ssid
2023 * [tlv] supported rates
2024 * [tlv] extended supported rates
2025 * [tlv] mesh id
2026 */
2027 ssid = meshid = rates = xrates = NULL;
2028 sfrm = frm;
2029 while (efrm - frm > 1) {
2030 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return);
2031 switch (*frm) {
2032 case IEEE80211_ELEMID_SSID:
2033 ssid = frm;
2034 break;
2035 case IEEE80211_ELEMID_RATES:
2036 rates = frm;
2037 break;
2038 case IEEE80211_ELEMID_XRATES:
2039 xrates = frm;
2040 break;
2041 case IEEE80211_ELEMID_MESHID:
2042 meshid = frm;
2043 break;
2044 }
2045 frm += frm[1] + 2;
2046 }
2047 IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return);
2048 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return);
2049 if (xrates != NULL)
2050 IEEE80211_VERIFY_ELEMENT(xrates,
2051 IEEE80211_RATE_MAXSIZE - rates[1], return);
2052 if (meshid != NULL) {
2053 IEEE80211_VERIFY_ELEMENT(meshid,
2054 IEEE80211_MESHID_LEN, return);
2055 /* NB: meshid, not ssid */
2056 IEEE80211_VERIFY_SSID(vap->iv_bss, meshid, return);
2057 }
2058
2059 /* XXX find a better class or define it's own */
2060 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_INPUT, wh->i_addr2,
2061 "%s", "recv probe req");
2062 /*
2063 * Some legacy 11b clients cannot hack a complete
2064 * probe response frame. When the request includes
2065 * only a bare-bones rate set, communicate this to
2066 * the transmit side.
2067 */
2068 ieee80211_send_proberesp(vap, wh->i_addr2, 0);
2069 break;
2070 }
2071
2072 case IEEE80211_FC0_SUBTYPE_ACTION:
2073 case IEEE80211_FC0_SUBTYPE_ACTION_NOACK:
2074 if (ni == vap->iv_bss) {
2075 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2076 wh, NULL, "%s", "unknown node");
2077 vap->iv_stats.is_rx_mgtdiscard++;
2078 } else if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) &&
2079 !IEEE80211_IS_MULTICAST(wh->i_addr1)) {
2080 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2081 wh, NULL, "%s", "not for us");
2082 vap->iv_stats.is_rx_mgtdiscard++;
2083 } else if (vap->iv_state != IEEE80211_S_RUN) {
2084 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2085 wh, NULL, "wrong state %s",
2086 ieee80211_state_name[vap->iv_state]);
2087 vap->iv_stats.is_rx_mgtdiscard++;
2088 } else {
2089 if (ieee80211_parse_action(ni, m0) == 0)
2090 (void)ic->ic_recv_action(ni, wh, frm, efrm);
2091 }
2092 break;
2093
2094 case IEEE80211_FC0_SUBTYPE_ASSOC_REQ:
2095 case IEEE80211_FC0_SUBTYPE_ASSOC_RESP:
2096 case IEEE80211_FC0_SUBTYPE_REASSOC_REQ:
2097 case IEEE80211_FC0_SUBTYPE_REASSOC_RESP:
2098 case IEEE80211_FC0_SUBTYPE_ATIM:
2099 case IEEE80211_FC0_SUBTYPE_DISASSOC:
2100 case IEEE80211_FC0_SUBTYPE_AUTH:
2101 case IEEE80211_FC0_SUBTYPE_DEAUTH:
2102 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2103 wh, NULL, "%s", "not handled");
2104 vap->iv_stats.is_rx_mgtdiscard++;
2105 break;
2106
2107 default:
2108 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
2109 wh, "mgt", "subtype 0x%x not handled", subtype);
2110 vap->iv_stats.is_rx_badsubtype++;
2111 break;
2112 }
2113}
2114
2115static void
2116mesh_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype)
2117{
2118
2119 switch (subtype) {
2120 case IEEE80211_FC0_SUBTYPE_BAR:
2121 ieee80211_recv_bar(ni, m);
2122 break;
2123 }
2124}
2125
2126/*
2127 * Parse meshpeering action ie's for MPM frames
2128 */
2129static const struct ieee80211_meshpeer_ie *
2130mesh_parse_meshpeering_action(struct ieee80211_node *ni,
2131 const struct ieee80211_frame *wh, /* XXX for VERIFY_LENGTH */
2132 const uint8_t *frm, const uint8_t *efrm,
2133 struct ieee80211_meshpeer_ie *mp, uint8_t subtype)
2134{
2135 struct ieee80211vap *vap = ni->ni_vap;
2136 const struct ieee80211_meshpeer_ie *mpie;
2137 uint16_t args[3];
2138 const uint8_t *meshid, *meshconf, *meshpeer;
2139 uint8_t sendclose = 0; /* 1 = MPM frame rejected, close will be sent */
2140
2141 meshid = meshconf = meshpeer = NULL;
2142 while (efrm - frm > 1) {
2143 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return NULL);
2144 switch (*frm) {
2145 case IEEE80211_ELEMID_MESHID:
2146 meshid = frm;
2147 break;
2148 case IEEE80211_ELEMID_MESHCONF:
2149 meshconf = frm;
2150 break;
2151 case IEEE80211_ELEMID_MESHPEER:
2152 meshpeer = frm;
2153 mpie = (const struct ieee80211_meshpeer_ie *) frm;
2154 memset(mp, 0, sizeof(*mp));
2155 mp->peer_len = mpie->peer_len;
2156 mp->peer_proto = LE_READ_2(&mpie->peer_proto);
2157 mp->peer_llinkid = LE_READ_2(&mpie->peer_llinkid);
2158 switch (subtype) {
2159 case IEEE80211_ACTION_MESHPEERING_CONFIRM:
2160 mp->peer_linkid =
2161 LE_READ_2(&mpie->peer_linkid);
2162 break;
2163 case IEEE80211_ACTION_MESHPEERING_CLOSE:
2164 /* NB: peer link ID is optional */
2165 if (mpie->peer_len ==
2166 (IEEE80211_MPM_BASE_SZ + 2)) {
2167 mp->peer_linkid = 0;
2168 mp->peer_rcode =
2169 LE_READ_2(&mpie->peer_linkid);
2170 } else {
2171 mp->peer_linkid =
2172 LE_READ_2(&mpie->peer_linkid);
2173 mp->peer_rcode =
2174 LE_READ_2(&mpie->peer_rcode);
2175 }
2176 break;
2177 }
2178 break;
2179 }
2180 frm += frm[1] + 2;
2181 }
2182
2183 /*
2184 * Verify the contents of the frame.
2185 * If it fails validation, close the peer link.
2186 */
2187 if (mesh_verify_meshpeer(vap, subtype, (const uint8_t *)mp)) {
2188 sendclose = 1;
2189 IEEE80211_DISCARD(vap,
2190 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2191 wh, NULL, "%s", "MPM validation failed");
2192 }
2193
2194 /* If meshid is not the same reject any frames type. */
2195 if (sendclose == 0 && mesh_verify_meshid(vap, meshid)) {
2196 sendclose = 1;
2197 IEEE80211_DISCARD(vap,
2198 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2199 wh, NULL, "%s", "not for our mesh");
2200 if (subtype == IEEE80211_ACTION_MESHPEERING_CLOSE) {
2201 /*
2202 * Standard not clear about this, if we dont ignore
2203 * there will be an endless loop between nodes sending
2204 * CLOSE frames between each other with wrong meshid.
2205 * Discard and timers will bring FSM to IDLE state.
2206 */
2207 return NULL;
2208 }
2209 }
2210
2211 /*
2212 * Close frames are accepted if meshid is the same.
2213 * Verify the other two types.
2214 */
2215 if (sendclose == 0 && subtype != IEEE80211_ACTION_MESHPEERING_CLOSE &&
2216 mesh_verify_meshconf(vap, meshconf)) {
2217 sendclose = 1;
2218 IEEE80211_DISCARD(vap,
2219 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2220 wh, NULL, "%s", "configuration missmatch");
2221 }
2222
2223 if (sendclose) {
2224 vap->iv_stats.is_rx_mgtdiscard++;
2225 switch (ni->ni_mlstate) {
2226 case IEEE80211_NODE_MESH_IDLE:
2227 case IEEE80211_NODE_MESH_ESTABLISHED:
2228 case IEEE80211_NODE_MESH_HOLDING:
2229 /* ignore */
2230 break;
2231 case IEEE80211_NODE_MESH_OPENSNT:
2232 case IEEE80211_NODE_MESH_OPENRCV:
2233 case IEEE80211_NODE_MESH_CONFIRMRCV:
2234 args[0] = ni->ni_mlpid;
2235 args[1] = ni->ni_mllid;
2236 /* Reason codes for rejection */
2237 switch (subtype) {
2238 case IEEE80211_ACTION_MESHPEERING_OPEN:
2239 args[2] = IEEE80211_REASON_MESH_CPVIOLATION;
2240 break;
2241 case IEEE80211_ACTION_MESHPEERING_CONFIRM:
2242 args[2] = IEEE80211_REASON_MESH_INCONS_PARAMS;
2243 break;
2244 }
2245 ieee80211_send_action(ni,
2246 IEEE80211_ACTION_CAT_SELF_PROT,
2247 IEEE80211_ACTION_MESHPEERING_CLOSE,
2248 args);
2249 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2250 mesh_peer_timeout_setup(ni);
2251 break;
2252 }
2253 return NULL;
2254 }
2255
2256 return (const struct ieee80211_meshpeer_ie *) mp;
2257}
2258
2259static int
2260mesh_recv_action_meshpeering_open(struct ieee80211_node *ni,
2261 const struct ieee80211_frame *wh,
2262 const uint8_t *frm, const uint8_t *efrm)
2263{
2264 struct ieee80211vap *vap = ni->ni_vap;
2265 struct ieee80211_mesh_state *ms = vap->iv_mesh;
2266 struct ieee80211_meshpeer_ie ie;
2267 const struct ieee80211_meshpeer_ie *meshpeer;
2268 uint16_t args[3];
2269
2270 /* +2+2 for action + code + capabilites */
2271 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2, efrm, &ie,
2272 IEEE80211_ACTION_MESHPEERING_OPEN);
2273 if (meshpeer == NULL) {
2274 return 0;
2275 }
2276
2277 /* XXX move up */
2278 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2279 "recv PEER OPEN, lid 0x%x", meshpeer->peer_llinkid);
2280
2281 switch (ni->ni_mlstate) {
2282 case IEEE80211_NODE_MESH_IDLE:
2283 /* Reject open request if reached our maximum neighbor count */
2284 if (ms->ms_neighbors >= IEEE80211_MESH_MAX_NEIGHBORS) {
2285 args[0] = meshpeer->peer_llinkid;
2286 args[1] = 0;
2287 args[2] = IEEE80211_REASON_MESH_MAX_PEERS;
2288 ieee80211_send_action(ni,
2289 IEEE80211_ACTION_CAT_SELF_PROT,
2290 IEEE80211_ACTION_MESHPEERING_CLOSE,
2291 args);
2292 /* stay in IDLE state */
2293 return (0);
2294 }
2295 /* Open frame accepted */
2296 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV);
2297 ni->ni_mllid = meshpeer->peer_llinkid;
2298 ni->ni_mlpid = mesh_generateid(vap);
2299 if (ni->ni_mlpid == 0)
2300 return 0; /* XXX */
2301 args[0] = ni->ni_mlpid;
2302 /* Announce we're open too... */
2303 ieee80211_send_action(ni,
2304 IEEE80211_ACTION_CAT_SELF_PROT,
2305 IEEE80211_ACTION_MESHPEERING_OPEN, args);
2306 /* ...and confirm the link. */
2307 args[0] = ni->ni_mlpid;
2308 args[1] = ni->ni_mllid;
2309 ieee80211_send_action(ni,
2310 IEEE80211_ACTION_CAT_SELF_PROT,
2311 IEEE80211_ACTION_MESHPEERING_CONFIRM,
2312 args);
2313 mesh_peer_timeout_setup(ni);
2314 break;
2315 case IEEE80211_NODE_MESH_OPENRCV:
2316 /* Wrong Link ID */
2317 if (ni->ni_mllid != meshpeer->peer_llinkid) {
2318 args[0] = ni->ni_mllid;
2319 args[1] = ni->ni_mlpid;
2320 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2321 ieee80211_send_action(ni,
2322 IEEE80211_ACTION_CAT_SELF_PROT,
2323 IEEE80211_ACTION_MESHPEERING_CLOSE,
2324 args);
2325 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2326 mesh_peer_timeout_setup(ni);
2327 break;
2328 }
2329 /* Duplicate open, confirm again. */
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 break;
2337 case IEEE80211_NODE_MESH_OPENSNT:
2338 ni->ni_mllid = meshpeer->peer_llinkid;
2339 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV);
2340 args[0] = ni->ni_mlpid;
2341 args[1] = ni->ni_mllid;
2342 ieee80211_send_action(ni,
2343 IEEE80211_ACTION_CAT_SELF_PROT,
2344 IEEE80211_ACTION_MESHPEERING_CONFIRM,
2345 args);
2346 /* NB: don't setup/clear any timeout */
2347 break;
2348 case IEEE80211_NODE_MESH_CONFIRMRCV:
2349 if (ni->ni_mlpid != meshpeer->peer_linkid ||
2350 ni->ni_mllid != meshpeer->peer_llinkid) {
2351 args[0] = ni->ni_mlpid;
2352 args[1] = ni->ni_mllid;
2353 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2354 ieee80211_send_action(ni,
2355 IEEE80211_ACTION_CAT_SELF_PROT,
2356 IEEE80211_ACTION_MESHPEERING_CLOSE,
2357 args);
2358 mesh_linkchange(ni,
2359 IEEE80211_NODE_MESH_HOLDING);
2360 mesh_peer_timeout_setup(ni);
2361 break;
2362 }
2363 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED);
2364 ni->ni_mllid = meshpeer->peer_llinkid;
2365 args[0] = ni->ni_mlpid;
2366 args[1] = ni->ni_mllid;
2367 ieee80211_send_action(ni,
2368 IEEE80211_ACTION_CAT_SELF_PROT,
2369 IEEE80211_ACTION_MESHPEERING_CONFIRM,
2370 args);
2371 mesh_peer_timeout_stop(ni);
2372 break;
2373 case IEEE80211_NODE_MESH_ESTABLISHED:
2374 if (ni->ni_mllid != meshpeer->peer_llinkid) {
2375 args[0] = ni->ni_mllid;
2376 args[1] = ni->ni_mlpid;
2377 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2378 ieee80211_send_action(ni,
2379 IEEE80211_ACTION_CAT_SELF_PROT,
2380 IEEE80211_ACTION_MESHPEERING_CLOSE,
2381 args);
2382 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2383 mesh_peer_timeout_setup(ni);
2384 break;
2385 }
2386 args[0] = ni->ni_mlpid;
2387 args[1] = ni->ni_mllid;
2388 ieee80211_send_action(ni,
2389 IEEE80211_ACTION_CAT_SELF_PROT,
2390 IEEE80211_ACTION_MESHPEERING_CONFIRM,
2391 args);
2392 break;
2393 case IEEE80211_NODE_MESH_HOLDING:
2394 args[0] = ni->ni_mlpid;
2395 args[1] = meshpeer->peer_llinkid;
2396 /* Standard not clear about what the reaason code should be */
2397 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2398 ieee80211_send_action(ni,
2399 IEEE80211_ACTION_CAT_SELF_PROT,
2400 IEEE80211_ACTION_MESHPEERING_CLOSE,
2401 args);
2402 break;
2403 }
2404 return 0;
2405}
2406
2407static int
2408mesh_recv_action_meshpeering_confirm(struct ieee80211_node *ni,
2409 const struct ieee80211_frame *wh,
2410 const uint8_t *frm, const uint8_t *efrm)
2411{
2412 struct ieee80211vap *vap = ni->ni_vap;
2413 struct ieee80211_meshpeer_ie ie;
2414 const struct ieee80211_meshpeer_ie *meshpeer;
2415 uint16_t args[3];
2416
2417 /* +2+2+2+2 for action + code + capabilites + status code + AID */
2418 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2+2+2, efrm, &ie,
2419 IEEE80211_ACTION_MESHPEERING_CONFIRM);
2420 if (meshpeer == NULL) {
2421 return 0;
2422 }
2423
2424 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2425 "recv PEER CONFIRM, local id 0x%x, peer id 0x%x",
2426 meshpeer->peer_llinkid, meshpeer->peer_linkid);
2427
2428 switch (ni->ni_mlstate) {
2429 case IEEE80211_NODE_MESH_OPENRCV:
2430 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED);
2431 mesh_peer_timeout_stop(ni);
2432 break;
2433 case IEEE80211_NODE_MESH_OPENSNT:
2434 mesh_linkchange(ni, IEEE80211_NODE_MESH_CONFIRMRCV);
2435 mesh_peer_timeout_setup(ni);
2436 break;
2437 case IEEE80211_NODE_MESH_HOLDING:
2438 args[0] = ni->ni_mlpid;
2439 args[1] = meshpeer->peer_llinkid;
2440 /* Standard not clear about what the reaason code should be */
2441 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2442 ieee80211_send_action(ni,
2443 IEEE80211_ACTION_CAT_SELF_PROT,
2444 IEEE80211_ACTION_MESHPEERING_CLOSE,
2445 args);
2446 break;
2447 case IEEE80211_NODE_MESH_CONFIRMRCV:
2448 if (ni->ni_mllid != meshpeer->peer_llinkid) {
2449 args[0] = ni->ni_mlpid;
2450 args[1] = ni->ni_mllid;
2451 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2452 ieee80211_send_action(ni,
2453 IEEE80211_ACTION_CAT_SELF_PROT,
2454 IEEE80211_ACTION_MESHPEERING_CLOSE,
2455 args);
2456 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2457 mesh_peer_timeout_setup(ni);
2458 }
2459 break;
2460 default:
2461 IEEE80211_DISCARD(vap,
2462 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2463 wh, NULL, "received confirm in invalid state %d",
2464 ni->ni_mlstate);
2465 vap->iv_stats.is_rx_mgtdiscard++;
2466 break;
2467 }
2468 return 0;
2469}
2470
2471static int
2472mesh_recv_action_meshpeering_close(struct ieee80211_node *ni,
2473 const struct ieee80211_frame *wh,
2474 const uint8_t *frm, const uint8_t *efrm)
2475{
2476 struct ieee80211_meshpeer_ie ie;
2477 const struct ieee80211_meshpeer_ie *meshpeer;
2478 uint16_t args[3];
2479
2480 /* +2 for action + code */
2481 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2, efrm, &ie,
2482 IEEE80211_ACTION_MESHPEERING_CLOSE);
2483 if (meshpeer == NULL) {
2484 return 0;
2485 }
2486
2487 /*
2488 * XXX: check reason code, for example we could receive
2489 * IEEE80211_REASON_MESH_MAX_PEERS then we should not attempt
2490 * to peer again.
2491 */
2492
2493 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2494 ni, "%s", "recv PEER CLOSE");
2495
2496 switch (ni->ni_mlstate) {
2497 case IEEE80211_NODE_MESH_IDLE:
2498 /* ignore */
2499 break;
2500 case IEEE80211_NODE_MESH_OPENRCV:
2501 case IEEE80211_NODE_MESH_OPENSNT:
2502 case IEEE80211_NODE_MESH_CONFIRMRCV:
2503 case IEEE80211_NODE_MESH_ESTABLISHED:
2504 args[0] = ni->ni_mlpid;
2505 args[1] = ni->ni_mllid;
2506 args[2] = IEEE80211_REASON_MESH_CLOSE_RCVD;
2507 ieee80211_send_action(ni,
2508 IEEE80211_ACTION_CAT_SELF_PROT,
2509 IEEE80211_ACTION_MESHPEERING_CLOSE,
2510 args);
2511 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2512 mesh_peer_timeout_setup(ni);
2513 break;
2514 case IEEE80211_NODE_MESH_HOLDING:
2515 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE);
2516 mesh_peer_timeout_stop(ni);
2517 break;
2518 }
2519 return 0;
2520}
2521
2522/*
2523 * Link Metric handling.
2524 */
2525static int
2526mesh_recv_action_meshlmetric(struct ieee80211_node *ni,
2527 const struct ieee80211_frame *wh,
2528 const uint8_t *frm, const uint8_t *efrm)
2529{
2530 const struct ieee80211_meshlmetric_ie *ie =
2531 (const struct ieee80211_meshlmetric_ie *)
2532 (frm+2); /* action + code */
2533 struct ieee80211_meshlmetric_ie lm_rep;
2534
2535 if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) {
2536 lm_rep.lm_flags = 0;
2537 lm_rep.lm_metric = mesh_airtime_calc(ni);
2538 ieee80211_send_action(ni,
2539 IEEE80211_ACTION_CAT_MESH,
2540 IEEE80211_ACTION_MESH_LMETRIC,
2541 &lm_rep);
2542 }
2543 /* XXX: else do nothing for now */
2544 return 0;
2545}
2546
2547/*
2548 * Parse meshgate action ie's for GANN frames.
2549 * Returns -1 if parsing fails, otherwise 0.
2550 */
2551static int
2552mesh_parse_meshgate_action(struct ieee80211_node *ni,
2553 const struct ieee80211_frame *wh, /* XXX for VERIFY_LENGTH */
2554 struct ieee80211_meshgann_ie *ie, const uint8_t *frm, const uint8_t *efrm)
2555{
2556 struct ieee80211vap *vap = ni->ni_vap;
2557 const struct ieee80211_meshgann_ie *gannie;
2558
2559 while (efrm - frm > 1) {
2560 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return -1);
2561 switch (*frm) {
2562 case IEEE80211_ELEMID_MESHGANN:
2563 gannie = (const struct ieee80211_meshgann_ie *) frm;
2564 memset(ie, 0, sizeof(*ie));
2565 ie->gann_ie = gannie->gann_ie;
2566 ie->gann_len = gannie->gann_len;
2567 ie->gann_flags = gannie->gann_flags;
2568 ie->gann_hopcount = gannie->gann_hopcount;
2569 ie->gann_ttl = gannie->gann_ttl;
2570 IEEE80211_ADDR_COPY(ie->gann_addr, gannie->gann_addr);
2571 ie->gann_seq = LE_READ_4(&gannie->gann_seq);
2572 ie->gann_interval = LE_READ_2(&gannie->gann_interval);
2573 break;
2574 }
2575 frm += frm[1] + 2;
2576 }
2577
2578 return 0;
2579}
2580
2581/*
2582 * Mesh Gate Announcement handling.
2583 */
2584static int
2585mesh_recv_action_meshgate(struct ieee80211_node *ni,
2586 const struct ieee80211_frame *wh,
2587 const uint8_t *frm, const uint8_t *efrm)
2588{
2589 struct ieee80211vap *vap = ni->ni_vap;
2590 struct ieee80211_mesh_state *ms = vap->iv_mesh;
2591 struct ieee80211_mesh_gate_route *gr, *next;
2592 struct ieee80211_mesh_route *rt_gate;
2593 struct ieee80211_meshgann_ie pgann;
2594 struct ieee80211_meshgann_ie ie;
2595 int found = 0;
2596
2597 /* +2 for action + code */
2598 if (mesh_parse_meshgate_action(ni, wh, &ie, frm+2, efrm) != 0) {
2599 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
2600 ni->ni_macaddr, NULL, "%s",
2601 "GANN parsing failed");
2602 vap->iv_stats.is_rx_mgtdiscard++;
2603 return (0);
2604 }
2605
2606 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ie.gann_addr))
2607 return 0;
2608
2609 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ni->ni_macaddr,
2610 "received GANN, meshgate: %6D (seq %u)", ie.gann_addr, ":",
2611 ie.gann_seq);
2612
2613 if (ms == NULL)
2614 return (0);
2615 MESH_RT_LOCK(ms);
2616 TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) {
2617 if (!IEEE80211_ADDR_EQ(gr->gr_addr, ie.gann_addr))
2618 continue;
2619 if (ie.gann_seq <= gr->gr_lastseq) {
2620 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
2621 ni->ni_macaddr, NULL,
2622 "GANN old seqno %u <= %u",
2623 ie.gann_seq, gr->gr_lastseq);
2624 MESH_RT_UNLOCK(ms);
2625 return (0);
2626 }
2627 /* corresponding mesh gate found & GANN accepted */
2628 found = 1;
2629 break;
2630
2631 }
2632 if (found == 0) {
2633 /* this GANN is from a new mesh Gate add it to known table. */
2634 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie.gann_addr,
2635 "stored new GANN information, seq %u.", ie.gann_seq);
2636 gr = malloc(ALIGN(sizeof(struct ieee80211_mesh_gate_route)),
2637 M_80211_MESH_GT_RT, M_NOWAIT | M_ZERO);
2638 IEEE80211_ADDR_COPY(gr->gr_addr, ie.gann_addr);
2639 TAILQ_INSERT_TAIL(&ms->ms_known_gates, gr, gr_next);
2640 }
2641 gr->gr_lastseq = ie.gann_seq;
2642
2643 /* check if we have a path to this gate */
2644 rt_gate = mesh_rt_find_locked(ms, gr->gr_addr);
2645 if (rt_gate != NULL &&
2646 rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) {
2647 gr->gr_route = rt_gate;
2648 rt_gate->rt_flags |= IEEE80211_MESHRT_FLAGS_GATE;
2649 }
2650
2651 MESH_RT_UNLOCK(ms);
2652
2653 /* popagate only if decremented ttl >= 1 && forwarding is enabled */
2654 if ((ie.gann_ttl - 1) < 1 && !(ms->ms_flags & IEEE80211_MESHFLAGS_FWD))
2655 return 0;
2656 pgann.gann_flags = ie.gann_flags; /* Reserved */
2657 pgann.gann_hopcount = ie.gann_hopcount + 1;
2658 pgann.gann_ttl = ie.gann_ttl - 1;
2659 IEEE80211_ADDR_COPY(pgann.gann_addr, ie.gann_addr);
2660 pgann.gann_seq = ie.gann_seq;
2661 pgann.gann_interval = ie.gann_interval;
2662
2663 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie.gann_addr,
2664 "%s", "propagate GANN");
2665
2666 ieee80211_send_action(vap->iv_bss, IEEE80211_ACTION_CAT_MESH,
2667 IEEE80211_ACTION_MESH_GANN, &pgann);
2668
2669 return 0;
2670}
2671
2672static int
2673mesh_send_action(struct ieee80211_node *ni,
2674 const uint8_t sa[IEEE80211_ADDR_LEN],
2675 const uint8_t da[IEEE80211_ADDR_LEN],
2676 struct mbuf *m)
2677{
2678 struct ieee80211vap *vap = ni->ni_vap;
2679 struct ieee80211com *ic = ni->ni_ic;
2680 struct ieee80211_bpf_params params;
2681 struct ieee80211_frame *wh;
2682 int ret;
2683
2684 KASSERT(ni != NULL, ("null node"));
2685
2686 if (vap->iv_state == IEEE80211_S_CAC) {
2687 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT, ni,
2688 "block %s frame in CAC state", "Mesh action");
2689 vap->iv_stats.is_tx_badstate++;
2690 ieee80211_free_node(ni);
2691 m_freem(m);
2692 return EIO; /* XXX */
2693 }
2694
2695 M_PREPEND(m, sizeof(struct ieee80211_frame), M_DONTWAIT);
2696 if (m == NULL) {
2697 ieee80211_free_node(ni);
2698 return ENOMEM;
2699 }
2700
2701 IEEE80211_TX_LOCK(ic);
2702 wh = mtod(m, struct ieee80211_frame *);
2703 ieee80211_send_setup(ni, m,
2704 IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_ACTION,
2705 IEEE80211_NONQOS_TID, sa, da, sa);
2706 m->m_flags |= M_ENCAP; /* mark encapsulated */
2707
2708 memset(&params, 0, sizeof(params));
2709 params.ibp_pri = WME_AC_VO;
2710 params.ibp_rate0 = ni->ni_txparms->mgmtrate;
2711 if (IEEE80211_IS_MULTICAST(da))
2712 params.ibp_try0 = 1;
2713 else
2714 params.ibp_try0 = ni->ni_txparms->maxretry;
2715 params.ibp_power = ni->ni_txpower;
2716
2717 IEEE80211_NODE_STAT(ni, tx_mgmt);
2718
2719 ret = ieee80211_raw_output(vap, ni, m, &params);
2720 IEEE80211_TX_UNLOCK(ic);
2721 return (ret);
2722}
2723
2724#define ADDSHORT(frm, v) do { \
2725 frm[0] = (v) & 0xff; \
2726 frm[1] = (v) >> 8; \
2727 frm += 2; \
2728} while (0)
2729#define ADDWORD(frm, v) do { \
2730 frm[0] = (v) & 0xff; \
2731 frm[1] = ((v) >> 8) & 0xff; \
2732 frm[2] = ((v) >> 16) & 0xff; \
2733 frm[3] = ((v) >> 24) & 0xff; \
2734 frm += 4; \
2735} while (0)
2736
2737static int
2738mesh_send_action_meshpeering_open(struct ieee80211_node *ni,
2739 int category, int action, void *args0)
2740{
2741 struct ieee80211vap *vap = ni->ni_vap;
2742 struct ieee80211com *ic = ni->ni_ic;
2743 uint16_t *args = args0;
2744 const struct ieee80211_rateset *rs;
2745 struct mbuf *m;
2746 uint8_t *frm;
2747
2748 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2749 "send PEER OPEN action: localid 0x%x", args[0]);
2750
2751 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2752 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2753 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2754 ieee80211_ref_node(ni);
2755
2756 m = ieee80211_getmgtframe(&frm,
2757 ic->ic_headroom + sizeof(struct ieee80211_frame),
2758 sizeof(uint16_t) /* action+category */
2759 + sizeof(uint16_t) /* capabilites */
2760 + 2 + IEEE80211_RATE_SIZE
2761 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
2762 + 2 + IEEE80211_MESHID_LEN
2763 + sizeof(struct ieee80211_meshconf_ie)
2764 + sizeof(struct ieee80211_meshpeer_ie)
2765 );
2766 if (m != NULL) {
2767 /*
2768 * mesh peer open action frame format:
2769 * [1] category
2770 * [1] action
2771 * [2] capabilities
2772 * [tlv] rates
2773 * [tlv] xrates
2774 * [tlv] mesh id
2775 * [tlv] mesh conf
2776 * [tlv] mesh peer link mgmt
2777 */
2778 *frm++ = category;
2779 *frm++ = action;
2780 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan));
2781 rs = ieee80211_get_suprates(ic, ic->ic_curchan);
2782 frm = ieee80211_add_rates(frm, rs);
2783 frm = ieee80211_add_xrates(frm, rs);
2784 frm = ieee80211_add_meshid(frm, vap);
2785 frm = ieee80211_add_meshconf(frm, vap);
2786 frm = ieee80211_add_meshpeer(frm, IEEE80211_ACTION_MESHPEERING_OPEN,
2787 args[0], 0, 0);
2788 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2789 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m);
2790 } else {
2791 vap->iv_stats.is_tx_nobuf++;
2792 ieee80211_free_node(ni);
2793 return ENOMEM;
2794 }
2795}
2796
2797static int
2798mesh_send_action_meshpeering_confirm(struct ieee80211_node *ni,
2799 int category, int action, void *args0)
2800{
2801 struct ieee80211vap *vap = ni->ni_vap;
2802 struct ieee80211com *ic = ni->ni_ic;
2803 uint16_t *args = args0;
2804 const struct ieee80211_rateset *rs;
2805 struct mbuf *m;
2806 uint8_t *frm;
2807
2808 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2809 "send PEER CONFIRM action: localid 0x%x, peerid 0x%x",
2810 args[0], args[1]);
2811
2812 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2813 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2814 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2815 ieee80211_ref_node(ni);
2816
2817 m = ieee80211_getmgtframe(&frm,
2818 ic->ic_headroom + sizeof(struct ieee80211_frame),
2819 sizeof(uint16_t) /* action+category */
2820 + sizeof(uint16_t) /* capabilites */
2821 + sizeof(uint16_t) /* status code */
2822 + sizeof(uint16_t) /* AID */
2823 + 2 + IEEE80211_RATE_SIZE
2824 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
2825 + 2 + IEEE80211_MESHID_LEN
2826 + sizeof(struct ieee80211_meshconf_ie)
2827 + sizeof(struct ieee80211_meshpeer_ie)
2828 );
2829 if (m != NULL) {
2830 /*
2831 * mesh peer confirm action frame format:
2832 * [1] category
2833 * [1] action
2834 * [2] capabilities
2835 * [2] status code
2836 * [2] association id (peer ID)
2837 * [tlv] rates
2838 * [tlv] xrates
2839 * [tlv] mesh id
2840 * [tlv] mesh conf
2841 * [tlv] mesh peer link mgmt
2842 */
2843 *frm++ = category;
2844 *frm++ = action;
2845 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan));
2846 ADDSHORT(frm, 0); /* status code */
2847 ADDSHORT(frm, args[1]); /* AID */
2848 rs = ieee80211_get_suprates(ic, ic->ic_curchan);
2849 frm = ieee80211_add_rates(frm, rs);
2850 frm = ieee80211_add_xrates(frm, rs);
2851 frm = ieee80211_add_meshid(frm, vap);
2852 frm = ieee80211_add_meshconf(frm, vap);
2853 frm = ieee80211_add_meshpeer(frm,
2854 IEEE80211_ACTION_MESHPEERING_CONFIRM,
2855 args[0], args[1], 0);
2856 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2857 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m);
2858 } else {
2859 vap->iv_stats.is_tx_nobuf++;
2860 ieee80211_free_node(ni);
2861 return ENOMEM;
2862 }
2863}
2864
2865static int
2866mesh_send_action_meshpeering_close(struct ieee80211_node *ni,
2867 int category, int action, void *args0)
2868{
2869 struct ieee80211vap *vap = ni->ni_vap;
2870 struct ieee80211com *ic = ni->ni_ic;
2871 uint16_t *args = args0;
2872 struct mbuf *m;
2873 uint8_t *frm;
2874
2875 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2876 "send PEER CLOSE action: localid 0x%x, peerid 0x%x reason %d",
2877 args[0], args[1], args[2]);
2878
2879 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2880 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2881 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2882 ieee80211_ref_node(ni);
2883
2884 m = ieee80211_getmgtframe(&frm,
2885 ic->ic_headroom + sizeof(struct ieee80211_frame),
2886 sizeof(uint16_t) /* action+category */
2887 + sizeof(uint16_t) /* reason code */
2888 + 2 + IEEE80211_MESHID_LEN
2889 + sizeof(struct ieee80211_meshpeer_ie)
2890 );
2891 if (m != NULL) {
2892 /*
2893 * mesh peer close action frame format:
2894 * [1] category
2895 * [1] action
2896 * [tlv] mesh id
2897 * [tlv] mesh peer link mgmt
2898 */
2899 *frm++ = category;
2900 *frm++ = action;
2901 frm = ieee80211_add_meshid(frm, vap);
2902 frm = ieee80211_add_meshpeer(frm,
2903 IEEE80211_ACTION_MESHPEERING_CLOSE,
2904 args[0], args[1], args[2]);
2905 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2906 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m);
2907 } else {
2908 vap->iv_stats.is_tx_nobuf++;
2909 ieee80211_free_node(ni);
2910 return ENOMEM;
2911 }
2912}
2913
2914static int
2915mesh_send_action_meshlmetric(struct ieee80211_node *ni,
2916 int category, int action, void *arg0)
2917{
2918 struct ieee80211vap *vap = ni->ni_vap;
2919 struct ieee80211com *ic = ni->ni_ic;
2920 struct ieee80211_meshlmetric_ie *ie = arg0;
2921 struct mbuf *m;
2922 uint8_t *frm;
2923
2924 if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) {
2925 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2926 ni, "%s", "send LINK METRIC REQUEST action");
2927 } else {
2928 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2929 ni, "send LINK METRIC REPLY action: metric 0x%x",
2930 ie->lm_metric);
2931 }
2932 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2933 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2934 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2935 ieee80211_ref_node(ni);
2936
2937 m = ieee80211_getmgtframe(&frm,
2938 ic->ic_headroom + sizeof(struct ieee80211_frame),
2939 sizeof(uint16_t) + /* action+category */
2940 sizeof(struct ieee80211_meshlmetric_ie)
2941 );
2942 if (m != NULL) {
2943 /*
2944 * mesh link metric
2945 * [1] category
2946 * [1] action
2947 * [tlv] mesh link metric
2948 */
2949 *frm++ = category;
2950 *frm++ = action;
2951 frm = ieee80211_add_meshlmetric(frm,
2952 ie->lm_flags, ie->lm_metric);
2953 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2954 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m);
2955 } else {
2956 vap->iv_stats.is_tx_nobuf++;
2957 ieee80211_free_node(ni);
2958 return ENOMEM;
2959 }
2960}
2961
2962static int
2963mesh_send_action_meshgate(struct ieee80211_node *ni,
2964 int category, int action, void *arg0)
2965{
2966 struct ieee80211vap *vap = ni->ni_vap;
2967 struct ieee80211com *ic = ni->ni_ic;
2968 struct ieee80211_meshgann_ie *ie = arg0;
2969 struct mbuf *m;
2970 uint8_t *frm;
2971
2972 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2973 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2974 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2975 ieee80211_ref_node(ni);
2976
2977 m = ieee80211_getmgtframe(&frm,
2978 ic->ic_headroom + sizeof(struct ieee80211_frame),
2979 sizeof(uint16_t) + /* action+category */
2980 IEEE80211_MESHGANN_BASE_SZ
2981 );
2982 if (m != NULL) {
2983 /*
2984 * mesh link metric
2985 * [1] category
2986 * [1] action
2987 * [tlv] mesh gate annoucement
2988 */
2989 *frm++ = category;
2990 *frm++ = action;
2991 frm = ieee80211_add_meshgate(frm, ie);
2992 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2993 return mesh_send_action(ni, vap->iv_myaddr, broadcastaddr, m);
2994 } else {
2995 vap->iv_stats.is_tx_nobuf++;
2996 ieee80211_free_node(ni);
2997 return ENOMEM;
2998 }
2999}
3000
3001static void
3002mesh_peer_timeout_setup(struct ieee80211_node *ni)
3003{
3004 switch (ni->ni_mlstate) {
3005 case IEEE80211_NODE_MESH_HOLDING:
3006 ni->ni_mltval = ieee80211_mesh_holdingtimeout;
3007 break;
3008 case IEEE80211_NODE_MESH_CONFIRMRCV:
3009 ni->ni_mltval = ieee80211_mesh_confirmtimeout;
3010 break;
3011 case IEEE80211_NODE_MESH_IDLE:
3012 ni->ni_mltval = 0;
3013 break;
3014 default:
3015 ni->ni_mltval = ieee80211_mesh_retrytimeout;
3016 break;
3017 }
3018 if (ni->ni_mltval)
3019 callout_reset(&ni->ni_mltimer, ni->ni_mltval,
3020 mesh_peer_timeout_cb, ni);
3021}
3022
3023/*
3024 * Same as above but backoffs timer statisically 50%.
3025 */
3026static void
3027mesh_peer_timeout_backoff(struct ieee80211_node *ni)
3028{
3029 uint32_t r;
3030
3031 r = arc4random();
3032 ni->ni_mltval += r % ni->ni_mltval;
3033 callout_reset(&ni->ni_mltimer, ni->ni_mltval, mesh_peer_timeout_cb,
3034 ni);
3035}
3036
3037static __inline void
3038mesh_peer_timeout_stop(struct ieee80211_node *ni)
3039{
3040 callout_drain(&ni->ni_mltimer);
3041}
3042
3043static void
3044mesh_peer_backoff_cb(void *arg)
3045{
3046 struct ieee80211_node *ni = (struct ieee80211_node *)arg;
3047
3048 /* After backoff timeout, try to peer automatically again. */
3049 ni->ni_mlhcnt = 0;
3050}
3051
3052/*
3053 * Mesh Peer Link Management FSM timeout handling.
3054 */
3055static void
3056mesh_peer_timeout_cb(void *arg)
3057{
3058 struct ieee80211_node *ni = (struct ieee80211_node *)arg;
3059 uint16_t args[3];
3060
3061 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_MESH,
3062 ni, "mesh link timeout, state %d, retry counter %d",
3063 ni->ni_mlstate, ni->ni_mlrcnt);
3064
3065 switch (ni->ni_mlstate) {
3066 case IEEE80211_NODE_MESH_IDLE:
3067 case IEEE80211_NODE_MESH_ESTABLISHED:
3068 break;
3069 case IEEE80211_NODE_MESH_OPENSNT:
3070 case IEEE80211_NODE_MESH_OPENRCV:
3071 if (ni->ni_mlrcnt == ieee80211_mesh_maxretries) {
3072 args[0] = ni->ni_mlpid;
3073 args[2] = IEEE80211_REASON_MESH_MAX_RETRIES;
3074 ieee80211_send_action(ni,
3075 IEEE80211_ACTION_CAT_SELF_PROT,
3076 IEEE80211_ACTION_MESHPEERING_CLOSE, args);
3077 ni->ni_mlrcnt = 0;
3078 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
3079 mesh_peer_timeout_setup(ni);
3080 } else {
3081 args[0] = ni->ni_mlpid;
3082 ieee80211_send_action(ni,
3083 IEEE80211_ACTION_CAT_SELF_PROT,
3084 IEEE80211_ACTION_MESHPEERING_OPEN, args);
3085 ni->ni_mlrcnt++;
3086 mesh_peer_timeout_backoff(ni);
3087 }
3088 break;
3089 case IEEE80211_NODE_MESH_CONFIRMRCV:
3090 args[0] = ni->ni_mlpid;
3091 args[2] = IEEE80211_REASON_MESH_CONFIRM_TIMEOUT;
3092 ieee80211_send_action(ni,
3093 IEEE80211_ACTION_CAT_SELF_PROT,
3094 IEEE80211_ACTION_MESHPEERING_CLOSE, args);
3095 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
3096 mesh_peer_timeout_setup(ni);
3097 break;
3098 case IEEE80211_NODE_MESH_HOLDING:
3099 ni->ni_mlhcnt++;
3100 if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding)
3101 callout_reset(&ni->ni_mlhtimer,
3102 ieee80211_mesh_backofftimeout,
3103 mesh_peer_backoff_cb, ni);
3104 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE);
3105 break;
3106 }
3107}
3108
3109static int
3110mesh_verify_meshid(struct ieee80211vap *vap, const uint8_t *ie)
3111{
3112 struct ieee80211_mesh_state *ms = vap->iv_mesh;
3113
3114 if (ie == NULL || ie[1] != ms->ms_idlen)
3115 return 1;
3116 return memcmp(ms->ms_id, ie + 2, ms->ms_idlen);
3117}
3118
3119/*
3120 * Check if we are using the same algorithms for this mesh.
3121 */
3122static int
3123mesh_verify_meshconf(struct ieee80211vap *vap, const uint8_t *ie)
3124{
3125 const struct ieee80211_meshconf_ie *meshconf =
3126 (const struct ieee80211_meshconf_ie *) ie;
3127 const struct ieee80211_mesh_state *ms = vap->iv_mesh;
3128
3129 if (meshconf == NULL)
3130 return 1;
3131 if (meshconf->conf_pselid != ms->ms_ppath->mpp_ie) {
3132 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3133 "unknown path selection algorithm: 0x%x\n",
3134 meshconf->conf_pselid);
3135 return 1;
3136 }
3137 if (meshconf->conf_pmetid != ms->ms_pmetric->mpm_ie) {
3138 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3139 "unknown path metric algorithm: 0x%x\n",
3140 meshconf->conf_pmetid);
3141 return 1;
3142 }
3143 if (meshconf->conf_ccid != 0) {
3144 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3145 "unknown congestion control algorithm: 0x%x\n",
3146 meshconf->conf_ccid);
3147 return 1;
3148 }
3149 if (meshconf->conf_syncid != IEEE80211_MESHCONF_SYNC_NEIGHOFF) {
3150 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3151 "unknown sync algorithm: 0x%x\n",
3152 meshconf->conf_syncid);
3153 return 1;
3154 }
3155 if (meshconf->conf_authid != 0) {
3156 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3157 "unknown auth auth algorithm: 0x%x\n",
3158 meshconf->conf_pselid);
3159 return 1;
3160 }
3161 /* Not accepting peers */
3162 if (!(meshconf->conf_cap & IEEE80211_MESHCONF_CAP_AP)) {
3163 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3164 "not accepting peers: 0x%x\n", meshconf->conf_cap);
3165 return 1;
3166 }
3167 return 0;
3168}
3169
3170static int
3171mesh_verify_meshpeer(struct ieee80211vap *vap, uint8_t subtype,
3172 const uint8_t *ie)
3173{
3174 const struct ieee80211_meshpeer_ie *meshpeer =
3175 (const struct ieee80211_meshpeer_ie *) ie;
3176
3177 if (meshpeer == NULL ||
3178 meshpeer->peer_len < IEEE80211_MPM_BASE_SZ ||
3179 meshpeer->peer_len > IEEE80211_MPM_MAX_SZ)
3180 return 1;
3181 if (meshpeer->peer_proto != IEEE80211_MPPID_MPM) {
3182 IEEE80211_DPRINTF(vap,
3183 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
3184 "Only MPM protocol is supported (proto: 0x%02X)",
3185 meshpeer->peer_proto);
3186 return 1;
3187 }
3188 switch (subtype) {
3189 case IEEE80211_ACTION_MESHPEERING_OPEN:
3190 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ)
3191 return 1;
3192 break;
3193 case IEEE80211_ACTION_MESHPEERING_CONFIRM:
3194 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ + 2)
3195 return 1;
3196 break;
3197 case IEEE80211_ACTION_MESHPEERING_CLOSE:
3198 if (meshpeer->peer_len < IEEE80211_MPM_BASE_SZ + 2)
3199 return 1;
3200 if (meshpeer->peer_len == (IEEE80211_MPM_BASE_SZ + 2) &&
3201 meshpeer->peer_linkid != 0)
3202 return 1;
3203 if (meshpeer->peer_rcode == 0)
3204 return 1;
3205 break;
3206 }
3207 return 0;
3208}
3209
3210/*
3211 * Add a Mesh ID IE to a frame.
3212 */
3213uint8_t *
3214ieee80211_add_meshid(uint8_t *frm, struct ieee80211vap *vap)
3215{
3216 struct ieee80211_mesh_state *ms = vap->iv_mesh;
3217
3218 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a mbss vap"));
3219
3220 *frm++ = IEEE80211_ELEMID_MESHID;
3221 *frm++ = ms->ms_idlen;
3222 memcpy(frm, ms->ms_id, ms->ms_idlen);
3223 return frm + ms->ms_idlen;
3224}
3225
3226/*
3227 * Add a Mesh Configuration IE to a frame.
3228 * For now just use HWMP routing, Airtime link metric, Null Congestion
3229 * Signaling, Null Sync Protocol and Null Authentication.
3230 */
3231uint8_t *
3232ieee80211_add_meshconf(uint8_t *frm, struct ieee80211vap *vap)
3233{
3234 const struct ieee80211_mesh_state *ms = vap->iv_mesh;
3235 uint16_t caps;
3236
3237 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap"));
3238
3239 *frm++ = IEEE80211_ELEMID_MESHCONF;
3240 *frm++ = IEEE80211_MESH_CONF_SZ;
3241 *frm++ = ms->ms_ppath->mpp_ie; /* path selection */
3242 *frm++ = ms->ms_pmetric->mpm_ie; /* link metric */
3243 *frm++ = IEEE80211_MESHCONF_CC_DISABLED;
3244 *frm++ = IEEE80211_MESHCONF_SYNC_NEIGHOFF;
3245 *frm++ = IEEE80211_MESHCONF_AUTH_DISABLED;
3246 /* NB: set the number of neighbors before the rest */
3247 *frm = (ms->ms_neighbors > IEEE80211_MESH_MAX_NEIGHBORS ?
3248 IEEE80211_MESH_MAX_NEIGHBORS : ms->ms_neighbors) << 1;
3249 if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE)
3250 *frm |= IEEE80211_MESHCONF_FORM_GATE;
3251 frm += 1;
3252 caps = 0;
3253 if (ms->ms_flags & IEEE80211_MESHFLAGS_AP)
3254 caps |= IEEE80211_MESHCONF_CAP_AP;
3255 if (ms->ms_flags & IEEE80211_MESHFLAGS_FWD)
3256 caps |= IEEE80211_MESHCONF_CAP_FWRD;
3257 *frm++ = caps;
3258 return frm;
3259}
3260
3261/*
3262 * Add a Mesh Peer Management IE to a frame.
3263 */
3264uint8_t *
3265ieee80211_add_meshpeer(uint8_t *frm, uint8_t subtype, uint16_t localid,
3266 uint16_t peerid, uint16_t reason)
3267{
3268
3269 KASSERT(localid != 0, ("localid == 0"));
3270
3271 *frm++ = IEEE80211_ELEMID_MESHPEER;
3272 switch (subtype) {
3273 case IEEE80211_ACTION_MESHPEERING_OPEN:
3274 *frm++ = IEEE80211_MPM_BASE_SZ; /* length */
3275 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */
3276 ADDSHORT(frm, localid); /* local ID */
3277 break;
3278 case IEEE80211_ACTION_MESHPEERING_CONFIRM:
3279 KASSERT(peerid != 0, ("sending peer confirm without peer id"));
3280 *frm++ = IEEE80211_MPM_BASE_SZ + 2; /* length */
3281 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */
3282 ADDSHORT(frm, localid); /* local ID */
3283 ADDSHORT(frm, peerid); /* peer ID */
3284 break;
3285 case IEEE80211_ACTION_MESHPEERING_CLOSE:
3286 if (peerid)
3287 *frm++ = IEEE80211_MPM_MAX_SZ; /* length */
3288 else
3289 *frm++ = IEEE80211_MPM_BASE_SZ + 2; /* length */
3290 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */
3291 ADDSHORT(frm, localid); /* local ID */
3292 if (peerid)
3293 ADDSHORT(frm, peerid); /* peer ID */
3294 ADDSHORT(frm, reason);
3295 break;
3296 }
3297 return frm;
3298}
3299
3300/*
3301 * Compute an Airtime Link Metric for the link with this node.
3302 *
3303 * Based on Draft 3.0 spec (11B.10, p.149).
3304 */
3305/*
3306 * Max 802.11s overhead.
3307 */
3308#define IEEE80211_MESH_MAXOVERHEAD \
3309 (sizeof(struct ieee80211_qosframe_addr4) \
3310 + sizeof(struct ieee80211_meshcntl_ae10) \
3311 + sizeof(struct llc) \
3312 + IEEE80211_ADDR_LEN \
3313 + IEEE80211_WEP_IVLEN \
3314 + IEEE80211_WEP_KIDLEN \
3315 + IEEE80211_WEP_CRCLEN \
3316 + IEEE80211_WEP_MICLEN \
3317 + IEEE80211_CRC_LEN)
3318uint32_t
3319mesh_airtime_calc(struct ieee80211_node *ni)
3320{
3321#define M_BITS 8
3322#define S_FACTOR (2 * M_BITS)
3323 struct ieee80211com *ic = ni->ni_ic;
3324 struct ifnet *ifp = ni->ni_vap->iv_ifp;
3325 const static int nbits = 8192 << M_BITS;
3326 uint32_t overhead, rate, errrate;
3327 uint64_t res;
3328
3329 /* Time to transmit a frame */
3330 rate = ni->ni_txrate;
3331 overhead = ieee80211_compute_duration(ic->ic_rt,
3332 ifp->if_mtu + IEEE80211_MESH_MAXOVERHEAD, rate, 0) << M_BITS;
3333 /* Error rate in percentage */
3334 /* XXX assuming small failures are ok */
3335 errrate = (((ifp->if_oerrors +
3336 ifp->if_ierrors) / 100) << M_BITS) / 100;
3337 res = (overhead + (nbits / rate)) *
3338 ((1 << S_FACTOR) / ((1 << M_BITS) - errrate));
3339
3340 return (uint32_t)(res >> S_FACTOR);
3341#undef M_BITS
3342#undef S_FACTOR
3343}
3344
3345/*
3346 * Add a Mesh Link Metric report IE to a frame.
3347 */
3348uint8_t *
3349ieee80211_add_meshlmetric(uint8_t *frm, uint8_t flags, uint32_t metric)
3350{
3351 *frm++ = IEEE80211_ELEMID_MESHLINK;
3352 *frm++ = 5;
3353 *frm++ = flags;
3354 ADDWORD(frm, metric);
3355 return frm;
3356}
3357
3358/*
3359 * Add a Mesh Gate Announcement IE to a frame.
3360 */
3361uint8_t *
3362ieee80211_add_meshgate(uint8_t *frm, struct ieee80211_meshgann_ie *ie)
3363{
3364 *frm++ = IEEE80211_ELEMID_MESHGANN; /* ie */
3365 *frm++ = IEEE80211_MESHGANN_BASE_SZ; /* len */
3366 *frm++ = ie->gann_flags;
3367 *frm++ = ie->gann_hopcount;
3368 *frm++ = ie->gann_ttl;
3369 IEEE80211_ADDR_COPY(frm, ie->gann_addr);
3370 frm += 6;
3371 ADDWORD(frm, ie->gann_seq);
3372 ADDSHORT(frm, ie->gann_interval);
3373 return frm;
3374}
3375#undef ADDSHORT
3376#undef ADDWORD
3377
3378/*
3379 * Initialize any mesh-specific node state.
3380 */
3381void
3382ieee80211_mesh_node_init(struct ieee80211vap *vap, struct ieee80211_node *ni)
3383{
3384 ni->ni_flags |= IEEE80211_NODE_QOS;
3385 callout_init(&ni->ni_mltimer, CALLOUT_MPSAFE);
3386 callout_init(&ni->ni_mlhtimer, CALLOUT_MPSAFE);
3387}
3388
3389/*
3390 * Cleanup any mesh-specific node state.
3391 */
3392void
3393ieee80211_mesh_node_cleanup(struct ieee80211_node *ni)
3394{
3395 struct ieee80211vap *vap = ni->ni_vap;
3396 struct ieee80211_mesh_state *ms = vap->iv_mesh;
3397
3398 callout_drain(&ni->ni_mltimer);
3399 callout_drain(&ni->ni_mlhtimer);
3400 /* NB: short-circuit callbacks after mesh_vdetach */
3401 if (vap->iv_mesh != NULL)
3402 ms->ms_ppath->mpp_peerdown(ni);
3403}
3404
3405void
3406ieee80211_parse_meshid(struct ieee80211_node *ni, const uint8_t *ie)
3407{
3408 ni->ni_meshidlen = ie[1];
3409 memcpy(ni->ni_meshid, ie + 2, ie[1]);
3410}
3411
3412/*
3413 * Setup mesh-specific node state on neighbor discovery.
3414 */
3415void
3416ieee80211_mesh_init_neighbor(struct ieee80211_node *ni,
3417 const struct ieee80211_frame *wh,
3418 const struct ieee80211_scanparams *sp)
3419{
3420 ieee80211_parse_meshid(ni, sp->meshid);
3421}
3422
3423void
3424ieee80211_mesh_update_beacon(struct ieee80211vap *vap,
3425 struct ieee80211_beacon_offsets *bo)
3426{
3427 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap"));
3428
3429 if (isset(bo->bo_flags, IEEE80211_BEACON_MESHCONF)) {
3430 (void)ieee80211_add_meshconf(bo->bo_meshconf, vap);
3431 clrbit(bo->bo_flags, IEEE80211_BEACON_MESHCONF);
3432 }
3433}
3434
3435static int
3436mesh_ioctl_get80211(struct ieee80211vap *vap, struct ieee80211req *ireq)
3437{
3438 struct ieee80211_mesh_state *ms = vap->iv_mesh;
3439 uint8_t tmpmeshid[IEEE80211_NWID_LEN];
3440 struct ieee80211_mesh_route *rt;
3441 struct ieee80211req_mesh_route *imr;
3442 size_t len, off;
3443 uint8_t *p;
3444 int error;
3445
3446 if (vap->iv_opmode != IEEE80211_M_MBSS)
3447 return ENOSYS;
3448
3449 error = 0;
3450 switch (ireq->i_type) {
3451 case IEEE80211_IOC_MESH_ID:
3452 ireq->i_len = ms->ms_idlen;
3453 memcpy(tmpmeshid, ms->ms_id, ireq->i_len);
3454 error = copyout(tmpmeshid, ireq->i_data, ireq->i_len);
3455 break;
3456 case IEEE80211_IOC_MESH_AP:
3457 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_AP) != 0;
3458 break;
3459 case IEEE80211_IOC_MESH_FWRD:
3460 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) != 0;
3461 break;
3462 case IEEE80211_IOC_MESH_GATE:
3463 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) != 0;
3464 break;
3465 case IEEE80211_IOC_MESH_TTL:
3466 ireq->i_val = ms->ms_ttl;
3467 break;
3468 case IEEE80211_IOC_MESH_RTCMD:
3469 switch (ireq->i_val) {
3470 case IEEE80211_MESH_RTCMD_LIST:
3471 len = 0;
3472 MESH_RT_LOCK(ms);
3473 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) {
3474 len += sizeof(*imr);
3475 }
3476 MESH_RT_UNLOCK(ms);
3477 if (len > ireq->i_len || ireq->i_len < sizeof(*imr)) {
3478 ireq->i_len = len;
3479 return ENOMEM;
3480 }
3481 ireq->i_len = len;
3482 /* XXX M_WAIT? */
3483 p = malloc(len, M_TEMP, M_NOWAIT | M_ZERO);
3484 if (p == NULL)
3485 return ENOMEM;
3486 off = 0;
3487 MESH_RT_LOCK(ms);
3488 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) {
3489 if (off >= len)
3490 break;
3491 imr = (struct ieee80211req_mesh_route *)
3492 (p + off);
3493 IEEE80211_ADDR_COPY(imr->imr_dest,
3494 rt->rt_dest);
3495 IEEE80211_ADDR_COPY(imr->imr_nexthop,
3496 rt->rt_nexthop);
3497 imr->imr_metric = rt->rt_metric;
3498 imr->imr_nhops = rt->rt_nhops;
3499 imr->imr_lifetime =
3500 ieee80211_mesh_rt_update(rt, 0);
3501 imr->imr_lastmseq = rt->rt_lastmseq;
3502 imr->imr_flags = rt->rt_flags; /* last */
3503 off += sizeof(*imr);
3504 }
3505 MESH_RT_UNLOCK(ms);
3506 error = copyout(p, (uint8_t *)ireq->i_data,
3507 ireq->i_len);
3508 free(p, M_TEMP);
3509 break;
3510 case IEEE80211_MESH_RTCMD_FLUSH:
3511 case IEEE80211_MESH_RTCMD_ADD:
3512 case IEEE80211_MESH_RTCMD_DELETE:
3513 return EINVAL;
3514 default:
3515 return ENOSYS;
3516 }
3517 break;
3518 case IEEE80211_IOC_MESH_PR_METRIC:
3519 len = strlen(ms->ms_pmetric->mpm_descr);
3520 if (ireq->i_len < len)
3521 return EINVAL;
3522 ireq->i_len = len;
3523 error = copyout(ms->ms_pmetric->mpm_descr,
3524 (uint8_t *)ireq->i_data, len);
3525 break;
3526 case IEEE80211_IOC_MESH_PR_PATH:
3527 len = strlen(ms->ms_ppath->mpp_descr);
3528 if (ireq->i_len < len)
3529 return EINVAL;
3530 ireq->i_len = len;
3531 error = copyout(ms->ms_ppath->mpp_descr,
3532 (uint8_t *)ireq->i_data, len);
3533 break;
3534 default:
3535 return ENOSYS;
3536 }
3537
3538 return error;
3539}
3540IEEE80211_IOCTL_GET(mesh, mesh_ioctl_get80211);
3541
3542static int
3543mesh_ioctl_set80211(struct ieee80211vap *vap, struct ieee80211req *ireq)
3544{
3545 struct ieee80211_mesh_state *ms = vap->iv_mesh;
3546 uint8_t tmpmeshid[IEEE80211_NWID_LEN];
3547 uint8_t tmpaddr[IEEE80211_ADDR_LEN];
3548 char tmpproto[IEEE80211_MESH_PROTO_DSZ];
3549 int error;
3550
3551 if (vap->iv_opmode != IEEE80211_M_MBSS)
3552 return ENOSYS;
3553
3554 error = 0;
3555 switch (ireq->i_type) {
3556 case IEEE80211_IOC_MESH_ID:
3557 if (ireq->i_val != 0 || ireq->i_len > IEEE80211_MESHID_LEN)
3558 return EINVAL;
3559 error = copyin(ireq->i_data, tmpmeshid, ireq->i_len);
3560 if (error != 0)
3561 break;
3562 memset(ms->ms_id, 0, IEEE80211_NWID_LEN);
3563 ms->ms_idlen = ireq->i_len;
3564 memcpy(ms->ms_id, tmpmeshid, ireq->i_len);
3565 error = ENETRESET;
3566 break;
3567 case IEEE80211_IOC_MESH_AP:
3568 if (ireq->i_val)
3569 ms->ms_flags |= IEEE80211_MESHFLAGS_AP;
3570 else
3571 ms->ms_flags &= ~IEEE80211_MESHFLAGS_AP;
3572 error = ENETRESET;
3573 break;
3574 case IEEE80211_IOC_MESH_FWRD:
3575 if (ireq->i_val)
3576 ms->ms_flags |= IEEE80211_MESHFLAGS_FWD;
3577 else
3578 ms->ms_flags &= ~IEEE80211_MESHFLAGS_FWD;
3579 mesh_gatemode_setup(vap);
3580 break;
3581 case IEEE80211_IOC_MESH_GATE:
3582 if (ireq->i_val)
3583 ms->ms_flags |= IEEE80211_MESHFLAGS_GATE;
3584 else
3585 ms->ms_flags &= ~IEEE80211_MESHFLAGS_GATE;
3586 break;
3587 case IEEE80211_IOC_MESH_TTL:
3588 ms->ms_ttl = (uint8_t) ireq->i_val;
3589 break;
3590 case IEEE80211_IOC_MESH_RTCMD:
3591 switch (ireq->i_val) {
3592 case IEEE80211_MESH_RTCMD_LIST:
3593 return EINVAL;
3594 case IEEE80211_MESH_RTCMD_FLUSH:
3595 ieee80211_mesh_rt_flush(vap);
3596 break;
3597 case IEEE80211_MESH_RTCMD_ADD:
3598 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ireq->i_data) ||
3599 IEEE80211_ADDR_EQ(broadcastaddr, ireq->i_data))
3600 return EINVAL;
3601 error = copyin(ireq->i_data, &tmpaddr,
3602 IEEE80211_ADDR_LEN);
3603 if (error == 0)
3604 ieee80211_mesh_discover(vap, tmpaddr, NULL);
3605 break;
3606 case IEEE80211_MESH_RTCMD_DELETE:
3607 ieee80211_mesh_rt_del(vap, ireq->i_data);
3608 break;
3609 default:
3610 return ENOSYS;
3611 }
3612 break;
3613 case IEEE80211_IOC_MESH_PR_METRIC:
3614 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto));
3615 if (error == 0) {
3616 error = mesh_select_proto_metric(vap, tmpproto);
3617 if (error == 0)
3618 error = ENETRESET;
3619 }
3620 break;
3621 case IEEE80211_IOC_MESH_PR_PATH:
3622 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto));
3623 if (error == 0) {
3624 error = mesh_select_proto_path(vap, tmpproto);
3625 if (error == 0)
3626 error = ENETRESET;
3627 }
3628 break;
3629 default:
3630 return ENOSYS;
3631 }
3632 return error;
3633}
3634IEEE80211_IOCTL_SET(mesh, mesh_ioctl_set80211);