wlan - Rip out all wlan locks part 1/2
[dragonfly.git] / sys / netproto / 802_11 / wlan / ieee80211_mesh.c
CommitLineData
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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 * $FreeBSD: head/sys/net80211/ieee80211_mesh.c 203423 2010-02-03 10:12:49Z rpaulo $
30 * $DragonFly$
31 */
32
33/*
34 * IEEE 802.11s Mesh Point (MBSS) support.
35 *
36 * Based on March 2009, D3.0 802.11s draft spec.
37 */
38#include "opt_inet.h"
39#include "opt_wlan.h"
40
41#include <sys/param.h>
42#include <sys/systm.h>
43#include <sys/mbuf.h>
44#include <sys/malloc.h>
45#include <sys/kernel.h>
46
47#include <sys/socket.h>
48#include <sys/sockio.h>
49#include <sys/endian.h>
50#include <sys/errno.h>
51#include <sys/proc.h>
52#include <sys/sysctl.h>
53
54#include <net/if.h>
55#include <net/if_media.h>
56#include <net/if_llc.h>
57#include <net/ethernet.h>
58#include <net/route.h>
59
60#include <netproto/802_11/ieee80211_var.h>
61#include <netproto/802_11/ieee80211_action.h>
62#include <netproto/802_11/ieee80211_input.h>
63#include <netproto/802_11/ieee80211_mesh.h>
64
65static void mesh_rt_flush_invalid(struct ieee80211vap *);
66static int mesh_select_proto_path(struct ieee80211vap *, const char *);
67static int mesh_select_proto_metric(struct ieee80211vap *, const char *);
68static void mesh_vattach(struct ieee80211vap *);
69static int mesh_newstate(struct ieee80211vap *, enum ieee80211_state, int);
70static void mesh_rt_cleanup_cb(void *);
71static void mesh_linkchange(struct ieee80211_node *,
72 enum ieee80211_mesh_mlstate);
73static void mesh_checkid(void *, struct ieee80211_node *);
74static uint32_t mesh_generateid(struct ieee80211vap *);
75static int mesh_checkpseq(struct ieee80211vap *,
76 const uint8_t [IEEE80211_ADDR_LEN], uint32_t);
77static struct ieee80211_node *
78 mesh_find_txnode(struct ieee80211vap *,
79 const uint8_t [IEEE80211_ADDR_LEN]);
80static void mesh_forward(struct ieee80211vap *, struct mbuf *,
81 const struct ieee80211_meshcntl *);
82static int mesh_input(struct ieee80211_node *, struct mbuf *, int, int);
83static void mesh_recv_mgmt(struct ieee80211_node *, struct mbuf *, int,
84 int, int);
85static void mesh_peer_timeout_setup(struct ieee80211_node *);
86static void mesh_peer_timeout_backoff(struct ieee80211_node *);
87static void mesh_peer_timeout_cb(void *);
88static __inline void
89 mesh_peer_timeout_stop(struct ieee80211_node *);
90static int mesh_verify_meshid(struct ieee80211vap *, const uint8_t *);
91static int mesh_verify_meshconf(struct ieee80211vap *, const uint8_t *);
92static int mesh_verify_meshpeer(struct ieee80211vap *, uint8_t,
93 const uint8_t *);
94uint32_t mesh_airtime_calc(struct ieee80211_node *);
95
96/*
97 * Timeout values come from the specification and are in milliseconds.
98 */
99SYSCTL_NODE(_net_wlan, OID_AUTO, mesh, CTLFLAG_RD, 0,
100 "IEEE 802.11s parameters");
101static int ieee80211_mesh_retrytimeout = -1;
102SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, retrytimeout, CTLTYPE_INT | CTLFLAG_RW,
103 &ieee80211_mesh_retrytimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
104 "Retry timeout (msec)");
105static int ieee80211_mesh_holdingtimeout = -1;
106SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, holdingtimeout, CTLTYPE_INT | CTLFLAG_RW,
107 &ieee80211_mesh_holdingtimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
108 "Holding state timeout (msec)");
109static int ieee80211_mesh_confirmtimeout = -1;
110SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, confirmtimeout, CTLTYPE_INT | CTLFLAG_RW,
111 &ieee80211_mesh_confirmtimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
112 "Confirm state timeout (msec)");
113static int ieee80211_mesh_maxretries = 2;
114SYSCTL_INT(_net_wlan_mesh, OID_AUTO, maxretries, CTLTYPE_INT | CTLFLAG_RW,
115 &ieee80211_mesh_maxretries, 0,
116 "Maximum retries during peer link establishment");
117
118static const uint8_t broadcastaddr[IEEE80211_ADDR_LEN] =
119 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
120
121static ieee80211_recv_action_func mesh_recv_action_meshpeering_open;
122static ieee80211_recv_action_func mesh_recv_action_meshpeering_confirm;
123static ieee80211_recv_action_func mesh_recv_action_meshpeering_close;
124static ieee80211_recv_action_func mesh_recv_action_meshlmetric_req;
125static ieee80211_recv_action_func mesh_recv_action_meshlmetric_rep;
126
127static ieee80211_send_action_func mesh_send_action_meshpeering_open;
128static ieee80211_send_action_func mesh_send_action_meshpeering_confirm;
129static ieee80211_send_action_func mesh_send_action_meshpeering_close;
130static ieee80211_send_action_func mesh_send_action_meshlink_request;
131static ieee80211_send_action_func mesh_send_action_meshlink_reply;
132
133static const struct ieee80211_mesh_proto_metric mesh_metric_airtime = {
134 .mpm_descr = "AIRTIME",
135 .mpm_ie = IEEE80211_MESHCONF_METRIC_AIRTIME,
136 .mpm_metric = mesh_airtime_calc,
137};
138
139static struct ieee80211_mesh_proto_path mesh_proto_paths[4];
140static struct ieee80211_mesh_proto_metric mesh_proto_metrics[4];
141
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142MALLOC_DEFINE(M_80211_MESH_RT, "80211mesh", "802.11s routing table");
143
144/*
145 * Helper functions to manipulate the Mesh routing table.
146 */
147
148static struct ieee80211_mesh_route *
149mesh_rt_find_locked(struct ieee80211_mesh_state *ms,
150 const uint8_t dest[IEEE80211_ADDR_LEN])
151{
152 struct ieee80211_mesh_route *rt;
153
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154 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) {
155 if (IEEE80211_ADDR_EQ(dest, rt->rt_dest))
156 return rt;
157 }
158 return NULL;
159}
160
161static struct ieee80211_mesh_route *
162mesh_rt_add_locked(struct ieee80211_mesh_state *ms,
163 const uint8_t dest[IEEE80211_ADDR_LEN])
164{
165 struct ieee80211_mesh_route *rt;
166
167 KASSERT(!IEEE80211_ADDR_EQ(broadcastaddr, dest),
168 ("%s: adding broadcast to the routing table", __func__));
169
32176cfd 170 rt = kmalloc(ALIGN(sizeof(struct ieee80211_mesh_route)) +
fcaa651d 171 ms->ms_ppath->mpp_privlen, M_80211_MESH_RT, M_INTWAIT | M_ZERO);
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172 if (rt != NULL) {
173 IEEE80211_ADDR_COPY(rt->rt_dest, dest);
174 rt->rt_priv = (void *)ALIGN(&rt[1]);
175 rt->rt_crtime = ticks;
176 TAILQ_INSERT_TAIL(&ms->ms_routes, rt, rt_next);
177 }
178 return rt;
179}
180
181struct ieee80211_mesh_route *
182ieee80211_mesh_rt_find(struct ieee80211vap *vap,
183 const uint8_t dest[IEEE80211_ADDR_LEN])
184{
185 struct ieee80211_mesh_state *ms = vap->iv_mesh;
186 struct ieee80211_mesh_route *rt;
187
32176cfd 188 rt = mesh_rt_find_locked(ms, dest);
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189 return rt;
190}
191
192struct ieee80211_mesh_route *
193ieee80211_mesh_rt_add(struct ieee80211vap *vap,
194 const uint8_t dest[IEEE80211_ADDR_LEN])
195{
196 struct ieee80211_mesh_state *ms = vap->iv_mesh;
197 struct ieee80211_mesh_route *rt;
198
199 KASSERT(ieee80211_mesh_rt_find(vap, dest) == NULL,
200 ("%s: duplicate entry in the routing table", __func__));
201 KASSERT(!IEEE80211_ADDR_EQ(vap->iv_myaddr, dest),
202 ("%s: adding self to the routing table", __func__));
203
32176cfd 204 rt = mesh_rt_add_locked(ms, dest);
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205 return rt;
206}
207
208/*
209 * Add a proxy route (as needed) for the specified destination.
210 */
211void
212ieee80211_mesh_proxy_check(struct ieee80211vap *vap,
213 const uint8_t dest[IEEE80211_ADDR_LEN])
214{
215 struct ieee80211_mesh_state *ms = vap->iv_mesh;
216 struct ieee80211_mesh_route *rt;
217
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218 rt = mesh_rt_find_locked(ms, dest);
219 if (rt == NULL) {
220 rt = mesh_rt_add_locked(ms, dest);
221 if (rt == NULL) {
222 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
223 "%s", "unable to add proxy entry");
224 vap->iv_stats.is_mesh_rtaddfailed++;
225 } else {
226 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
227 "%s", "add proxy entry");
228 IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr);
229 rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID
230 | IEEE80211_MESHRT_FLAGS_PROXY;
231 }
232 /* XXX assert PROXY? */
233 } else if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) {
234 struct ieee80211com *ic = vap->iv_ic;
235 /*
236 * Fix existing entry created by received frames from
237 * stations that have some memory of dest. We also
238 * flush any frames held on the staging queue; delivering
239 * them is too much trouble right now.
240 */
241 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
242 "%s", "fix proxy entry");
243 IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr);
244 rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID
245 | IEEE80211_MESHRT_FLAGS_PROXY;
246 /* XXX belongs in hwmp */
247 ieee80211_ageq_drain_node(&ic->ic_stageq,
248 (void *)(uintptr_t) ieee80211_mac_hash(ic, dest));
249 /* XXX stat? */
250 }
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251}
252
253static __inline void
254mesh_rt_del(struct ieee80211_mesh_state *ms, struct ieee80211_mesh_route *rt)
255{
256 TAILQ_REMOVE(&ms->ms_routes, rt, rt_next);
257 kfree(rt, M_80211_MESH_RT);
258}
259
260void
261ieee80211_mesh_rt_del(struct ieee80211vap *vap,
262 const uint8_t dest[IEEE80211_ADDR_LEN])
263{
264 struct ieee80211_mesh_state *ms = vap->iv_mesh;
265 struct ieee80211_mesh_route *rt, *next;
266
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267 TAILQ_FOREACH_MUTABLE(rt, &ms->ms_routes, rt_next, next) {
268 if (IEEE80211_ADDR_EQ(rt->rt_dest, dest)) {
269 mesh_rt_del(ms, rt);
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270 return;
271 }
272 }
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273}
274
275void
276ieee80211_mesh_rt_flush(struct ieee80211vap *vap)
277{
278 struct ieee80211_mesh_state *ms = vap->iv_mesh;
279 struct ieee80211_mesh_route *rt, *next;
280
281 if (ms == NULL)
282 return;
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283 TAILQ_FOREACH_MUTABLE(rt, &ms->ms_routes, rt_next, next)
284 mesh_rt_del(ms, rt);
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285}
286
287void
288ieee80211_mesh_rt_flush_peer(struct ieee80211vap *vap,
289 const uint8_t peer[IEEE80211_ADDR_LEN])
290{
291 struct ieee80211_mesh_state *ms = vap->iv_mesh;
292 struct ieee80211_mesh_route *rt, *next;
293
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294 TAILQ_FOREACH_MUTABLE(rt, &ms->ms_routes, rt_next, next) {
295 if (IEEE80211_ADDR_EQ(rt->rt_nexthop, peer))
296 mesh_rt_del(ms, rt);
297 }
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298}
299
300/*
301 * Flush expired routing entries, i.e. those in invalid state for
302 * some time.
303 */
304static void
305mesh_rt_flush_invalid(struct ieee80211vap *vap)
306{
307 struct ieee80211_mesh_state *ms = vap->iv_mesh;
308 struct ieee80211_mesh_route *rt, *next;
309
310 if (ms == NULL)
311 return;
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312 TAILQ_FOREACH_MUTABLE(rt, &ms->ms_routes, rt_next, next) {
313 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0 &&
314 ticks - rt->rt_crtime >= ms->ms_ppath->mpp_inact)
315 mesh_rt_del(ms, rt);
316 }
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317}
318
319#define N(a) (sizeof(a) / sizeof(a[0]))
320int
321ieee80211_mesh_register_proto_path(const struct ieee80211_mesh_proto_path *mpp)
322{
323 int i, firstempty = -1;
324
325 for (i = 0; i < N(mesh_proto_paths); i++) {
326 if (strncmp(mpp->mpp_descr, mesh_proto_paths[i].mpp_descr,
327 IEEE80211_MESH_PROTO_DSZ) == 0)
328 return EEXIST;
329 if (!mesh_proto_paths[i].mpp_active && firstempty == -1)
330 firstempty = i;
331 }
332 if (firstempty < 0)
333 return ENOSPC;
334 memcpy(&mesh_proto_paths[firstempty], mpp, sizeof(*mpp));
335 mesh_proto_paths[firstempty].mpp_active = 1;
336 return 0;
337}
338
339int
340ieee80211_mesh_register_proto_metric(const struct
341 ieee80211_mesh_proto_metric *mpm)
342{
343 int i, firstempty = -1;
344
345 for (i = 0; i < N(mesh_proto_metrics); i++) {
346 if (strncmp(mpm->mpm_descr, mesh_proto_metrics[i].mpm_descr,
347 IEEE80211_MESH_PROTO_DSZ) == 0)
348 return EEXIST;
349 if (!mesh_proto_metrics[i].mpm_active && firstempty == -1)
350 firstempty = i;
351 }
352 if (firstempty < 0)
353 return ENOSPC;
354 memcpy(&mesh_proto_metrics[firstempty], mpm, sizeof(*mpm));
355 mesh_proto_metrics[firstempty].mpm_active = 1;
356 return 0;
357}
358
359static int
360mesh_select_proto_path(struct ieee80211vap *vap, const char *name)
361{
362 struct ieee80211_mesh_state *ms = vap->iv_mesh;
363 int i;
364
365 for (i = 0; i < N(mesh_proto_paths); i++) {
366 if (strcasecmp(mesh_proto_paths[i].mpp_descr, name) == 0) {
367 ms->ms_ppath = &mesh_proto_paths[i];
368 return 0;
369 }
370 }
371 return ENOENT;
372}
373
374static int
375mesh_select_proto_metric(struct ieee80211vap *vap, const char *name)
376{
377 struct ieee80211_mesh_state *ms = vap->iv_mesh;
378 int i;
379
380 for (i = 0; i < N(mesh_proto_metrics); i++) {
381 if (strcasecmp(mesh_proto_metrics[i].mpm_descr, name) == 0) {
382 ms->ms_pmetric = &mesh_proto_metrics[i];
383 return 0;
384 }
385 }
386 return ENOENT;
387}
388#undef N
389
390static void
391ieee80211_mesh_init(void)
392{
393
394 memset(mesh_proto_paths, 0, sizeof(mesh_proto_paths));
395 memset(mesh_proto_metrics, 0, sizeof(mesh_proto_metrics));
396
397 /*
398 * Setup mesh parameters that depends on the clock frequency.
399 */
400 ieee80211_mesh_retrytimeout = msecs_to_ticks(40);
401 ieee80211_mesh_holdingtimeout = msecs_to_ticks(40);
402 ieee80211_mesh_confirmtimeout = msecs_to_ticks(40);
403
404 /*
405 * Register action frame handlers.
406 */
407 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESHPEERING,
408 IEEE80211_ACTION_MESHPEERING_OPEN,
409 mesh_recv_action_meshpeering_open);
410 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESHPEERING,
411 IEEE80211_ACTION_MESHPEERING_CONFIRM,
412 mesh_recv_action_meshpeering_confirm);
413 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESHPEERING,
414 IEEE80211_ACTION_MESHPEERING_CLOSE,
415 mesh_recv_action_meshpeering_close);
416 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESHLMETRIC,
417 IEEE80211_ACTION_MESHLMETRIC_REQ, mesh_recv_action_meshlmetric_req);
418 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESHLMETRIC,
419 IEEE80211_ACTION_MESHLMETRIC_REP, mesh_recv_action_meshlmetric_rep);
420
421 ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESHPEERING,
422 IEEE80211_ACTION_MESHPEERING_OPEN,
423 mesh_send_action_meshpeering_open);
424 ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESHPEERING,
425 IEEE80211_ACTION_MESHPEERING_CONFIRM,
426 mesh_send_action_meshpeering_confirm);
427 ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESHPEERING,
428 IEEE80211_ACTION_MESHPEERING_CLOSE,
429 mesh_send_action_meshpeering_close);
430 ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESHLMETRIC,
431 IEEE80211_ACTION_MESHLMETRIC_REQ,
432 mesh_send_action_meshlink_request);
433 ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESHLMETRIC,
434 IEEE80211_ACTION_MESHLMETRIC_REP,
435 mesh_send_action_meshlink_reply);
436
437 /*
438 * Register Airtime Link Metric.
439 */
440 ieee80211_mesh_register_proto_metric(&mesh_metric_airtime);
441
442}
443SYSINIT(wlan_mesh, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_mesh_init, NULL);
444
445void
446ieee80211_mesh_attach(struct ieee80211com *ic)
447{
448 ic->ic_vattach[IEEE80211_M_MBSS] = mesh_vattach;
449}
450
451void
452ieee80211_mesh_detach(struct ieee80211com *ic)
453{
454}
455
456static void
457mesh_vdetach_peers(void *arg, struct ieee80211_node *ni)
458{
459 struct ieee80211com *ic = ni->ni_ic;
460 uint16_t args[3];
461
462 if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED) {
463 args[0] = ni->ni_mlpid;
464 args[1] = ni->ni_mllid;
465 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
466 ieee80211_send_action(ni,
467 IEEE80211_ACTION_CAT_MESHPEERING,
468 IEEE80211_ACTION_MESHPEERING_CLOSE,
469 args);
470 }
dfcf81fd 471 callout_stop(&ni->ni_mltimer);
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472 /* XXX belongs in hwmp */
473 ieee80211_ageq_drain_node(&ic->ic_stageq,
474 (void *)(uintptr_t) ieee80211_mac_hash(ic, ni->ni_macaddr));
475}
476
477static void
478mesh_vdetach(struct ieee80211vap *vap)
479{
480 struct ieee80211_mesh_state *ms = vap->iv_mesh;
481
dfcf81fd 482 callout_stop(&ms->ms_cleantimer);
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483 ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_vdetach_peers,
484 NULL);
485 ieee80211_mesh_rt_flush(vap);
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486 ms->ms_ppath->mpp_vdetach(vap);
487 kfree(vap->iv_mesh, M_80211_VAP);
488 vap->iv_mesh = NULL;
489}
490
491static void
492mesh_vattach(struct ieee80211vap *vap)
493{
494 struct ieee80211_mesh_state *ms;
495 vap->iv_newstate = mesh_newstate;
496 vap->iv_input = mesh_input;
497 vap->iv_opdetach = mesh_vdetach;
498 vap->iv_recv_mgmt = mesh_recv_mgmt;
499 ms = kmalloc(sizeof(struct ieee80211_mesh_state), M_80211_VAP,
fcaa651d 500 M_INTWAIT | M_ZERO);
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501 if (ms == NULL) {
502 kprintf("%s: couldn't alloc MBSS state\n", __func__);
503 return;
504 }
505 vap->iv_mesh = ms;
506 ms->ms_seq = 0;
507 ms->ms_flags = (IEEE80211_MESHFLAGS_AP | IEEE80211_MESHFLAGS_FWD);
508 ms->ms_ttl = IEEE80211_MESH_DEFAULT_TTL;
509 TAILQ_INIT(&ms->ms_routes);
34a60cf6 510 callout_init_mp(&ms->ms_cleantimer);
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511 mesh_select_proto_metric(vap, "AIRTIME");
512 KASSERT(ms->ms_pmetric, ("ms_pmetric == NULL"));
513 mesh_select_proto_path(vap, "HWMP");
514 KASSERT(ms->ms_ppath, ("ms_ppath == NULL"));
515 ms->ms_ppath->mpp_vattach(vap);
516}
517
518/*
519 * IEEE80211_M_MBSS vap state machine handler.
520 */
521static int
522mesh_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
523{
524 struct ieee80211_mesh_state *ms = vap->iv_mesh;
525 struct ieee80211com *ic = vap->iv_ic;
526 struct ieee80211_node *ni;
527 enum ieee80211_state ostate;
528
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529 ostate = vap->iv_state;
530 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n",
531 __func__, ieee80211_state_name[ostate],
532 ieee80211_state_name[nstate], arg);
533 vap->iv_state = nstate; /* state transition */
534 if (ostate != IEEE80211_S_SCAN)
535 ieee80211_cancel_scan(vap); /* background scan */
536 ni = vap->iv_bss; /* NB: no reference held */
537 if (nstate != IEEE80211_S_RUN && ostate == IEEE80211_S_RUN)
dfcf81fd 538 callout_stop(&ms->ms_cleantimer);
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539 switch (nstate) {
540 case IEEE80211_S_INIT:
541 switch (ostate) {
542 case IEEE80211_S_SCAN:
543 ieee80211_cancel_scan(vap);
544 break;
545 case IEEE80211_S_CAC:
546 ieee80211_dfs_cac_stop(vap);
547 break;
548 case IEEE80211_S_RUN:
549 ieee80211_iterate_nodes(&ic->ic_sta,
550 mesh_vdetach_peers, NULL);
551 break;
552 default:
553 break;
554 }
555 if (ostate != IEEE80211_S_INIT) {
556 /* NB: optimize INIT -> INIT case */
557 ieee80211_reset_bss(vap);
558 ieee80211_mesh_rt_flush(vap);
559 }
560 break;
561 case IEEE80211_S_SCAN:
562 switch (ostate) {
563 case IEEE80211_S_INIT:
564 if (vap->iv_des_chan != IEEE80211_CHAN_ANYC &&
565 !IEEE80211_IS_CHAN_RADAR(vap->iv_des_chan) &&
566 ms->ms_idlen != 0) {
567 /*
568 * Already have a channel and a mesh ID; bypass
569 * the scan and startup immediately.
570 */
571 ieee80211_create_ibss(vap, vap->iv_des_chan);
572 break;
573 }
574 /*
575 * Initiate a scan. We can come here as a result
576 * of an IEEE80211_IOC_SCAN_REQ too in which case
577 * the vap will be marked with IEEE80211_FEXT_SCANREQ
578 * and the scan request parameters will be present
579 * in iv_scanreq. Otherwise we do the default.
580 */
581 if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) {
582 ieee80211_check_scan(vap,
583 vap->iv_scanreq_flags,
584 vap->iv_scanreq_duration,
585 vap->iv_scanreq_mindwell,
586 vap->iv_scanreq_maxdwell,
587 vap->iv_scanreq_nssid, vap->iv_scanreq_ssid);
588 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ;
589 } else
590 ieee80211_check_scan_current(vap);
591 break;
592 default:
593 break;
594 }
595 break;
596 case IEEE80211_S_CAC:
597 /*
598 * Start CAC on a DFS channel. We come here when starting
599 * a bss on a DFS channel (see ieee80211_create_ibss).
600 */
601 ieee80211_dfs_cac_start(vap);
602 break;
603 case IEEE80211_S_RUN:
604 switch (ostate) {
605 case IEEE80211_S_INIT:
606 /*
607 * Already have a channel; bypass the
608 * scan and startup immediately.
609 * Note that ieee80211_create_ibss will call
610 * back to do a RUN->RUN state change.
611 */
612 ieee80211_create_ibss(vap,
613 ieee80211_ht_adjust_channel(ic,
614 ic->ic_curchan, vap->iv_flags_ht));
615 /* NB: iv_bss is changed on return */
616 break;
617 case IEEE80211_S_CAC:
618 /*
619 * NB: This is the normal state change when CAC
620 * expires and no radar was detected; no need to
621 * clear the CAC timer as it's already expired.
622 */
623 /* fall thru... */
624 case IEEE80211_S_CSA:
625#if 0
626 /*
627 * Shorten inactivity timer of associated stations
628 * to weed out sta's that don't follow a CSA.
629 */
630 ieee80211_iterate_nodes(&ic->ic_sta, sta_csa, vap);
631#endif
632 /*
633 * Update bss node channel to reflect where
634 * we landed after CSA.
635 */
636 ieee80211_node_set_chan(vap->iv_bss,
637 ieee80211_ht_adjust_channel(ic, ic->ic_curchan,
638 ieee80211_htchanflags(vap->iv_bss->ni_chan)));
639 /* XXX bypass debug msgs */
640 break;
641 case IEEE80211_S_SCAN:
642 case IEEE80211_S_RUN:
643#ifdef IEEE80211_DEBUG
644 if (ieee80211_msg_debug(vap)) {
645 struct ieee80211_node *ni = vap->iv_bss;
646 ieee80211_note(vap,
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647 "synchronized with %6D meshid ",
648 ni->ni_meshid, ":");
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649 ieee80211_print_essid(ni->ni_meshid,
650 ni->ni_meshidlen);
651 /* XXX MCS/HT */
6168f72e 652 kprintf(" channel %d\n",
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653 ieee80211_chan2ieee(ic, ic->ic_curchan));
654 }
655#endif
656 break;
657 default:
658 break;
659 }
660 ieee80211_node_authorize(vap->iv_bss);
661 callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact,
662 mesh_rt_cleanup_cb, vap);
663 break;
664 default:
665 break;
666 }
667 /* NB: ostate not nstate */
668 ms->ms_ppath->mpp_newstate(vap, ostate, arg);
669 return 0;
670}
671
672static void
673mesh_rt_cleanup_cb(void *arg)
674{
675 struct ieee80211vap *vap = arg;
676 struct ieee80211_mesh_state *ms = vap->iv_mesh;
677
678 mesh_rt_flush_invalid(vap);
679 callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact,
680 mesh_rt_cleanup_cb, vap);
681}
682
683
684/*
685 * Helper function to note the Mesh Peer Link FSM change.
686 */
687static void
688mesh_linkchange(struct ieee80211_node *ni, enum ieee80211_mesh_mlstate state)
689{
690 struct ieee80211vap *vap = ni->ni_vap;
691 struct ieee80211_mesh_state *ms = vap->iv_mesh;
692#ifdef IEEE80211_DEBUG
693 static const char *meshlinkstates[] = {
694 [IEEE80211_NODE_MESH_IDLE] = "IDLE",
695 [IEEE80211_NODE_MESH_OPENSNT] = "OPEN SENT",
696 [IEEE80211_NODE_MESH_OPENRCV] = "OPEN RECEIVED",
697 [IEEE80211_NODE_MESH_CONFIRMRCV] = "CONFIRM RECEIVED",
698 [IEEE80211_NODE_MESH_ESTABLISHED] = "ESTABLISHED",
699 [IEEE80211_NODE_MESH_HOLDING] = "HOLDING"
700 };
701#endif
702 IEEE80211_NOTE(vap, IEEE80211_MSG_MESH,
703 ni, "peer link: %s -> %s",
704 meshlinkstates[ni->ni_mlstate], meshlinkstates[state]);
705
706 /* track neighbor count */
707 if (state == IEEE80211_NODE_MESH_ESTABLISHED &&
708 ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) {
709 KASSERT(ms->ms_neighbors < 65535, ("neighbor count overflow"));
710 ms->ms_neighbors++;
711 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF);
712 } else if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED &&
713 state != IEEE80211_NODE_MESH_ESTABLISHED) {
714 KASSERT(ms->ms_neighbors > 0, ("neighbor count 0"));
715 ms->ms_neighbors--;
716 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF);
717 }
718 ni->ni_mlstate = state;
719 switch (state) {
720 case IEEE80211_NODE_MESH_HOLDING:
721 ms->ms_ppath->mpp_peerdown(ni);
722 break;
723 case IEEE80211_NODE_MESH_ESTABLISHED:
724 ieee80211_mesh_discover(vap, ni->ni_macaddr, NULL);
725 break;
726 default:
727 break;
728 }
729}
730
731/*
732 * Helper function to generate a unique local ID required for mesh
733 * peer establishment.
734 */
735static void
736mesh_checkid(void *arg, struct ieee80211_node *ni)
737{
738 uint16_t *r = arg;
739
740 if (*r == ni->ni_mllid)
741 *(uint16_t *)arg = 0;
742}
743
744static uint32_t
745mesh_generateid(struct ieee80211vap *vap)
746{
747 int maxiter = 4;
748 uint16_t r;
749
750 do {
751 get_random_bytes(&r, 2);
752 ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_checkid, &r);
753 maxiter--;
754 } while (r == 0 && maxiter > 0);
755 return r;
756}
757
758/*
759 * Verifies if we already received this packet by checking its
760 * sequence number.
761 * Returns 0 if the frame is to be accepted, 1 otherwise.
762 */
763static int
764mesh_checkpseq(struct ieee80211vap *vap,
765 const uint8_t source[IEEE80211_ADDR_LEN], uint32_t seq)
766{
767 struct ieee80211_mesh_route *rt;
768
769 rt = ieee80211_mesh_rt_find(vap, source);
770 if (rt == NULL) {
771 rt = ieee80211_mesh_rt_add(vap, source);
772 if (rt == NULL) {
773 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source,
774 "%s", "add mcast route failed");
775 vap->iv_stats.is_mesh_rtaddfailed++;
776 return 1;
777 }
778 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source,
779 "add mcast route, mesh seqno %d", seq);
780 rt->rt_lastmseq = seq;
781 return 0;
782 }
783 if (IEEE80211_MESH_SEQ_GEQ(rt->rt_lastmseq, seq)) {
784 return 1;
785 } else {
786 rt->rt_lastmseq = seq;
787 return 0;
788 }
789}
790
791/*
792 * Iterate the routing table and locate the next hop.
793 */
794static struct ieee80211_node *
795mesh_find_txnode(struct ieee80211vap *vap,
796 const uint8_t dest[IEEE80211_ADDR_LEN])
797{
798 struct ieee80211_mesh_route *rt;
799
800 rt = ieee80211_mesh_rt_find(vap, dest);
801 if (rt == NULL)
802 return NULL;
803 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0 ||
804 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY)) {
805 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
806 "%s: !valid or proxy, flags 0x%x", __func__, rt->rt_flags);
807 /* XXX stat */
808 return NULL;
809 }
810 return ieee80211_find_txnode(vap, rt->rt_nexthop);
811}
812
813/*
814 * Forward the specified frame.
815 * Decrement the TTL and set TA to our MAC address.
816 */
817static void
818mesh_forward(struct ieee80211vap *vap, struct mbuf *m,
819 const struct ieee80211_meshcntl *mc)
820{
821 struct ieee80211com *ic = vap->iv_ic;
822 struct ieee80211_mesh_state *ms = vap->iv_mesh;
823 struct ifnet *ifp = vap->iv_ifp;
824 struct ifnet *parent = ic->ic_ifp;
825 const struct ieee80211_frame *wh =
826 mtod(m, const struct ieee80211_frame *);
827 struct mbuf *mcopy;
828 struct ieee80211_meshcntl *mccopy;
829 struct ieee80211_frame *whcopy;
830 struct ieee80211_node *ni;
831 int err;
832
833 if (mc->mc_ttl == 0) {
834 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
835 "%s", "frame not fwd'd, ttl 0");
836 vap->iv_stats.is_mesh_fwd_ttl++;
837 return;
838 }
839 if (!(ms->ms_flags & IEEE80211_MESHFLAGS_FWD)) {
840 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
841 "%s", "frame not fwd'd, fwding disabled");
842 vap->iv_stats.is_mesh_fwd_disabled++;
843 return;
844 }
845 mcopy = m_dup(m, MB_DONTWAIT);
846 if (mcopy == NULL) {
847 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
848 "%s", "frame not fwd'd, cannot dup");
849 vap->iv_stats.is_mesh_fwd_nobuf++;
850 ifp->if_oerrors++;
851 return;
852 }
853 mcopy = m_pullup(mcopy, ieee80211_hdrspace(ic, wh) +
854 sizeof(struct ieee80211_meshcntl));
855 if (mcopy == NULL) {
856 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
857 "%s", "frame not fwd'd, too short");
858 vap->iv_stats.is_mesh_fwd_tooshort++;
859 ifp->if_oerrors++;
860 m_freem(mcopy);
861 return;
862 }
863 whcopy = mtod(mcopy, struct ieee80211_frame *);
864 mccopy = (struct ieee80211_meshcntl *)
865 (mtod(mcopy, uint8_t *) + ieee80211_hdrspace(ic, wh));
866 /* XXX clear other bits? */
867 whcopy->i_fc[1] &= ~IEEE80211_FC1_RETRY;
868 IEEE80211_ADDR_COPY(whcopy->i_addr2, vap->iv_myaddr);
869 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) {
870 ni = ieee80211_ref_node(vap->iv_bss);
871 mcopy->m_flags |= M_MCAST;
872 } else {
873 ni = mesh_find_txnode(vap, whcopy->i_addr3);
874 if (ni == NULL) {
875 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
876 "%s", "frame not fwd'd, no path");
877 vap->iv_stats.is_mesh_fwd_nopath++;
878 m_freem(mcopy);
879 return;
880 }
881 IEEE80211_ADDR_COPY(whcopy->i_addr1, ni->ni_macaddr);
882 }
883 KASSERT(mccopy->mc_ttl > 0, ("%s called with wrong ttl", __func__));
884 mccopy->mc_ttl--;
885
886 /* XXX calculate priority so drivers can find the tx queue */
887 M_WME_SETAC(mcopy, WME_AC_BE);
888
889 /* XXX do we know m_nextpkt is NULL? */
890 mcopy->m_pkthdr.rcvif = (void *) ni;
fcaa651d 891 err = ieee80211_handoff(parent, mcopy);
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892 if (err != 0) {
893 /* NB: IFQ_HANDOFF reclaims mbuf */
894 ieee80211_free_node(ni);
895 } else {
896 ifp->if_opackets++;
897 }
898}
899
900static struct mbuf *
901mesh_decap(struct ieee80211vap *vap, struct mbuf *m, int hdrlen, int meshdrlen)
902{
903#define WHDIR(wh) ((wh)->i_fc[1] & IEEE80211_FC1_DIR_MASK)
904 uint8_t b[sizeof(struct ieee80211_qosframe_addr4) +
905 sizeof(struct ieee80211_meshcntl_ae11)];
906 const struct ieee80211_qosframe_addr4 *wh;
907 const struct ieee80211_meshcntl_ae10 *mc;
908 struct ether_header *eh;
909 struct llc *llc;
910 int ae;
911
912 if (m->m_len < hdrlen + sizeof(*llc) &&
913 (m = m_pullup(m, hdrlen + sizeof(*llc))) == NULL) {
914 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ANY,
915 "discard data frame: %s", "m_pullup failed");
916 vap->iv_stats.is_rx_tooshort++;
917 return NULL;
918 }
919 memcpy(b, mtod(m, caddr_t), hdrlen);
920 wh = (const struct ieee80211_qosframe_addr4 *)&b[0];
921 mc = (const struct ieee80211_meshcntl_ae10 *)&b[hdrlen - meshdrlen];
922 KASSERT(WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS ||
923 WHDIR(wh) == IEEE80211_FC1_DIR_DSTODS,
924 ("bogus dir, fc 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1]));
925
926 llc = (struct llc *)(mtod(m, caddr_t) + hdrlen);
927 if (llc->llc_dsap == LLC_SNAP_LSAP && llc->llc_ssap == LLC_SNAP_LSAP &&
928 llc->llc_control == LLC_UI && llc->llc_snap.org_code[0] == 0 &&
929 llc->llc_snap.org_code[1] == 0 && llc->llc_snap.org_code[2] == 0 &&
930 /* NB: preserve AppleTalk frames that have a native SNAP hdr */
931 !(llc->llc_snap.ether_type == htons(ETHERTYPE_AARP) ||
932 llc->llc_snap.ether_type == htons(ETHERTYPE_IPX))) {
933 m_adj(m, hdrlen + sizeof(struct llc) - sizeof(*eh));
934 llc = NULL;
935 } else {
936 m_adj(m, hdrlen - sizeof(*eh));
937 }
938 eh = mtod(m, struct ether_header *);
939 ae = mc->mc_flags & 3;
940 if (WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS) {
941 IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr1);
942 if (ae == 0) {
943 IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr3);
944 } else if (ae == 1) {
945 IEEE80211_ADDR_COPY(eh->ether_shost, mc->mc_addr4);
946 } else {
947 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
948 (const struct ieee80211_frame *)wh, NULL,
949 "bad AE %d", ae);
950 vap->iv_stats.is_mesh_badae++;
951 m_freem(m);
952 return NULL;
953 }
954 } else {
955 if (ae == 0) {
956 IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr3);
957 IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr4);
958 } else if (ae == 2) {
959 IEEE80211_ADDR_COPY(eh->ether_dhost, mc->mc_addr4);
960 IEEE80211_ADDR_COPY(eh->ether_shost, mc->mc_addr5);
961 } else {
962 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
963 (const struct ieee80211_frame *)wh, NULL,
964 "bad AE %d", ae);
965 vap->iv_stats.is_mesh_badae++;
966 m_freem(m);
967 return NULL;
968 }
969 }
970#ifdef ALIGNED_POINTER
971 if (!ALIGNED_POINTER(mtod(m, caddr_t) + sizeof(*eh), uint32_t)) {
972 m = ieee80211_realign(vap, m, sizeof(*eh));
973 if (m == NULL)
974 return NULL;
975 }
976#endif /* ALIGNED_POINTER */
977 if (llc != NULL) {
978 eh = mtod(m, struct ether_header *);
979 eh->ether_type = htons(m->m_pkthdr.len - sizeof(*eh));
980 }
981 return m;
982#undef WDIR
983}
984
985/*
986 * Return non-zero if the unicast mesh data frame should be processed
987 * locally. Frames that are not proxy'd have our address, otherwise
988 * we need to consult the routing table to look for a proxy entry.
989 */
990static __inline int
991mesh_isucastforme(struct ieee80211vap *vap, const struct ieee80211_frame *wh,
992 const struct ieee80211_meshcntl *mc)
993{
994 int ae = mc->mc_flags & 3;
995
996 KASSERT((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) == IEEE80211_FC1_DIR_DSTODS,
997 ("bad dir 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1]));
998 KASSERT(ae == 0 || ae == 2, ("bad AE %d", ae));
999 if (ae == 2) { /* ucast w/ proxy */
1000 const struct ieee80211_meshcntl_ae10 *mc10 =
1001 (const struct ieee80211_meshcntl_ae10 *) mc;
1002 struct ieee80211_mesh_route *rt =
1003 ieee80211_mesh_rt_find(vap, mc10->mc_addr4);
1004 /* check for proxy route to ourself */
1005 return (rt != NULL &&
1006 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY));
1007 } else /* ucast w/o proxy */
1008 return IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_myaddr);
1009}
1010
1011static int
1012mesh_input(struct ieee80211_node *ni, struct mbuf *m, int rssi, int nf)
1013{
1014#define SEQ_LEQ(a,b) ((int)((a)-(b)) <= 0)
1015#define HAS_SEQ(type) ((type & 0x4) == 0)
1016 struct ieee80211vap *vap = ni->ni_vap;
1017 struct ieee80211com *ic = ni->ni_ic;
1018 struct ifnet *ifp = vap->iv_ifp;
1019 struct ieee80211_frame *wh;
1020 const struct ieee80211_meshcntl *mc;
1021 int hdrspace, meshdrlen, need_tap;
1022 uint8_t dir, type, subtype, qos;
1023 uint32_t seq;
1024 uint8_t *addr;
1025 ieee80211_seq rxseq;
1026
1027 KASSERT(ni != NULL, ("null node"));
1028 ni->ni_inact = ni->ni_inact_reload;
1029
1030 need_tap = 1; /* mbuf need to be tapped. */
1031 type = -1; /* undefined */
1032
1033 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) {
1034 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1035 ni->ni_macaddr, NULL,
1036 "too short (1): len %u", m->m_pkthdr.len);
1037 vap->iv_stats.is_rx_tooshort++;
1038 goto out;
1039 }
1040 /*
1041 * Bit of a cheat here, we use a pointer for a 3-address
1042 * frame format but don't reference fields past outside
1043 * ieee80211_frame_min w/o first validating the data is
1044 * present.
1045 */
1046 wh = mtod(m, struct ieee80211_frame *);
1047
1048 if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) !=
1049 IEEE80211_FC0_VERSION_0) {
1050 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1051 ni->ni_macaddr, NULL, "wrong version %x", wh->i_fc[0]);
1052 vap->iv_stats.is_rx_badversion++;
1053 goto err;
1054 }
1055 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK;
1056 type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK;
1057 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK;
1058 if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) {
1059 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi);
1060 ni->ni_noise = nf;
1061 if (HAS_SEQ(type)) {
1062 uint8_t tid = ieee80211_gettid(wh);
1063
1064 if (IEEE80211_QOS_HAS_SEQ(wh) &&
1065 TID_TO_WME_AC(tid) >= WME_AC_VI)
1066 ic->ic_wme.wme_hipri_traffic++;
1067 rxseq = le16toh(*(uint16_t *)wh->i_seq);
1068 if ((ni->ni_flags & IEEE80211_NODE_HT) == 0 &&
1069 (wh->i_fc[1] & IEEE80211_FC1_RETRY) &&
1070 SEQ_LEQ(rxseq, ni->ni_rxseqs[tid])) {
1071 /* duplicate, discard */
1072 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
1073 wh->i_addr1, "duplicate",
1074 "seqno <%u,%u> fragno <%u,%u> tid %u",
1075 rxseq >> IEEE80211_SEQ_SEQ_SHIFT,
1076 ni->ni_rxseqs[tid] >>
1077 IEEE80211_SEQ_SEQ_SHIFT,
1078 rxseq & IEEE80211_SEQ_FRAG_MASK,
1079 ni->ni_rxseqs[tid] &
1080 IEEE80211_SEQ_FRAG_MASK,
1081 tid);
1082 vap->iv_stats.is_rx_dup++;
1083 IEEE80211_NODE_STAT(ni, rx_dup);
1084 goto out;
1085 }
1086 ni->ni_rxseqs[tid] = rxseq;
1087 }
1088 }
1089#ifdef IEEE80211_DEBUG
1090 /*
1091 * It's easier, but too expensive, to simulate different mesh
1092 * topologies by consulting the ACL policy very early, so do this
1093 * only under DEBUG.
1094 *
1095 * NB: this check is also done upon peering link initiation.
1096 */
1097 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh->i_addr2)) {
1098 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL,
1099 wh, NULL, "%s", "disallowed by ACL");
1100 vap->iv_stats.is_rx_acl++;
1101 goto out;
1102 }
1103#endif
1104 switch (type) {
1105 case IEEE80211_FC0_TYPE_DATA:
1106 if (ni == vap->iv_bss)
1107 goto out;
1108 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) {
1109 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
1110 ni->ni_macaddr, NULL,
1111 "peer link not yet established (%d)",
1112 ni->ni_mlstate);
1113 vap->iv_stats.is_mesh_nolink++;
1114 goto out;
1115 }
1116 if (dir != IEEE80211_FC1_DIR_FROMDS &&
1117 dir != IEEE80211_FC1_DIR_DSTODS) {
1118 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1119 wh, "data", "incorrect dir 0x%x", dir);
1120 vap->iv_stats.is_rx_wrongdir++;
1121 goto err;
1122 }
1123 /* pull up enough to get to the mesh control */
1124 hdrspace = ieee80211_hdrspace(ic, wh);
1125 if (m->m_len < hdrspace + sizeof(struct ieee80211_meshcntl) &&
1126 (m = m_pullup(m, hdrspace +
1127 sizeof(struct ieee80211_meshcntl))) == NULL) {
1128 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1129 ni->ni_macaddr, NULL,
1130 "data too short: expecting %u", hdrspace);
1131 vap->iv_stats.is_rx_tooshort++;
1132 goto out; /* XXX */
1133 }
1134 /*
1135 * Now calculate the full extent of the headers. Note
1136 * mesh_decap will pull up anything we didn't get
1137 * above when it strips the 802.11 headers.
1138 */
1139 mc = (const struct ieee80211_meshcntl *)
1140 (mtod(m, const uint8_t *) + hdrspace);
1141 meshdrlen = sizeof(struct ieee80211_meshcntl) +
1142 (mc->mc_flags & 3) * IEEE80211_ADDR_LEN;
1143 hdrspace += meshdrlen;
1144 seq = LE_READ_4(mc->mc_seq);
1145 if (IEEE80211_IS_MULTICAST(wh->i_addr1))
1146 addr = wh->i_addr3;
1147 else
1148 addr = ((struct ieee80211_qosframe_addr4 *)wh)->i_addr4;
1149 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, addr)) {
1150 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
1151 addr, "data", "%s", "not to me");
1152 vap->iv_stats.is_rx_wrongbss++; /* XXX kinda */
1153 goto out;
1154 }
1155 if (mesh_checkpseq(vap, addr, seq) != 0) {
1156 vap->iv_stats.is_rx_dup++;
1157 goto out;
1158 }
1159
1160 /*
1161 * Potentially forward packet. See table s36 (p140)
1162 * for the rules. XXX tap fwd'd packets not for us?
1163 */
1164 if (dir == IEEE80211_FC1_DIR_FROMDS ||
1165 !mesh_isucastforme(vap, wh, mc)) {
1166 mesh_forward(vap, m, mc);
1167 if (dir == IEEE80211_FC1_DIR_DSTODS)
1168 goto out;
1169 /* NB: fall thru to deliver mcast frames locally */
1170 }
1171
1172 /*
1173 * Save QoS bits for use below--before we strip the header.
1174 */
1175 if (subtype == IEEE80211_FC0_SUBTYPE_QOS) {
1176 qos = (dir == IEEE80211_FC1_DIR_DSTODS) ?
1177 ((struct ieee80211_qosframe_addr4 *)wh)->i_qos[0] :
1178 ((struct ieee80211_qosframe *)wh)->i_qos[0];
1179 } else
1180 qos = 0;
1181 /*
1182 * Next up, any fragmentation.
1183 */
1184 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1185 m = ieee80211_defrag(ni, m, hdrspace);
1186 if (m == NULL) {
1187 /* Fragment dropped or frame not complete yet */
1188 goto out;
1189 }
1190 }
1191 wh = NULL; /* no longer valid, catch any uses */
1192
1193 if (ieee80211_radiotap_active_vap(vap))
1194 ieee80211_radiotap_rx(vap, m);
1195 need_tap = 0;
1196
1197 /*
1198 * Finally, strip the 802.11 header.
1199 */
1200 m = mesh_decap(vap, m, hdrspace, meshdrlen);
1201 if (m == NULL) {
1202 /* XXX mask bit to check for both */
1203 /* don't count Null data frames as errors */
1204 if (subtype == IEEE80211_FC0_SUBTYPE_NODATA ||
1205 subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL)
1206 goto out;
1207 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
1208 ni->ni_macaddr, "data", "%s", "decap error");
1209 vap->iv_stats.is_rx_decap++;
1210 IEEE80211_NODE_STAT(ni, rx_decap);
1211 goto err;
1212 }
1213 if (qos & IEEE80211_QOS_AMSDU) {
1214 m = ieee80211_decap_amsdu(ni, m);
1215 if (m == NULL)
1216 return IEEE80211_FC0_TYPE_DATA;
1217 }
1218 ieee80211_deliver_data(vap, ni, m);
1219 return type;
1220 case IEEE80211_FC0_TYPE_MGT:
1221 vap->iv_stats.is_rx_mgmt++;
1222 IEEE80211_NODE_STAT(ni, rx_mgmt);
1223 if (dir != IEEE80211_FC1_DIR_NODS) {
1224 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1225 wh, "mgt", "incorrect dir 0x%x", dir);
1226 vap->iv_stats.is_rx_wrongdir++;
1227 goto err;
1228 }
1229 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) {
1230 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1231 ni->ni_macaddr, "mgt", "too short: len %u",
1232 m->m_pkthdr.len);
1233 vap->iv_stats.is_rx_tooshort++;
1234 goto out;
1235 }
1236#ifdef IEEE80211_DEBUG
1237 if ((ieee80211_msg_debug(vap) &&
1238 (vap->iv_ic->ic_flags & IEEE80211_F_SCAN)) ||
1239 ieee80211_msg_dumppkts(vap)) {
6168f72e 1240 if_printf(ifp, "received %s from %6D rssi %d\n",
32176cfd
RP
1241 ieee80211_mgt_subtype_name[subtype >>
1242 IEEE80211_FC0_SUBTYPE_SHIFT],
6168f72e 1243 wh->i_addr2, ":", rssi);
32176cfd
RP
1244 }
1245#endif
1246 if (wh->i_fc[1] & IEEE80211_FC1_WEP) {
1247 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1248 wh, NULL, "%s", "WEP set but not permitted");
1249 vap->iv_stats.is_rx_mgtdiscard++; /* XXX */
1250 goto out;
1251 }
1252 vap->iv_recv_mgmt(ni, m, subtype, rssi, nf);
1253 goto out;
1254 case IEEE80211_FC0_TYPE_CTL:
1255 vap->iv_stats.is_rx_ctl++;
1256 IEEE80211_NODE_STAT(ni, rx_ctrl);
1257 goto out;
1258 default:
1259 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1260 wh, "bad", "frame type 0x%x", type);
1261 /* should not come here */
1262 break;
1263 }
1264err:
1265 ifp->if_ierrors++;
1266out:
1267 if (m != NULL) {
1268 if (need_tap && ieee80211_radiotap_active_vap(vap))
1269 ieee80211_radiotap_rx(vap, m);
1270 m_freem(m);
1271 }
1272 return type;
1273}
1274
1275static void
1276mesh_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, int subtype,
1277 int rssi, int nf)
1278{
1279 struct ieee80211vap *vap = ni->ni_vap;
1280 struct ieee80211_mesh_state *ms = vap->iv_mesh;
1281 struct ieee80211com *ic = ni->ni_ic;
1282 struct ieee80211_frame *wh;
1283 uint8_t *frm, *efrm;
1284
1285 wh = mtod(m0, struct ieee80211_frame *);
1286 frm = (uint8_t *)&wh[1];
1287 efrm = mtod(m0, uint8_t *) + m0->m_len;
1288 switch (subtype) {
1289 case IEEE80211_FC0_SUBTYPE_PROBE_RESP:
1290 case IEEE80211_FC0_SUBTYPE_BEACON:
1291 {
1292 struct ieee80211_scanparams scan;
1293 /*
1294 * We process beacon/probe response
1295 * frames to discover neighbors.
1296 */
1297 if (ieee80211_parse_beacon(ni, m0, &scan) != 0)
1298 return;
1299 /*
1300 * Count frame now that we know it's to be processed.
1301 */
1302 if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) {
1303 vap->iv_stats.is_rx_beacon++; /* XXX remove */
1304 IEEE80211_NODE_STAT(ni, rx_beacons);
1305 } else
1306 IEEE80211_NODE_STAT(ni, rx_proberesp);
1307 /*
1308 * If scanning, just pass information to the scan module.
1309 */
1310 if (ic->ic_flags & IEEE80211_F_SCAN) {
1311 if (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN) {
1312 /*
1313 * Actively scanning a channel marked passive;
1314 * send a probe request now that we know there
1315 * is 802.11 traffic present.
1316 *
1317 * XXX check if the beacon we recv'd gives
1318 * us what we need and suppress the probe req
1319 */
1320 ieee80211_probe_curchan(vap, 1);
1321 ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN;
1322 }
1323 ieee80211_add_scan(vap, &scan, wh,
1324 subtype, rssi, nf);
1325 return;
1326 }
1327
1328 /* The rest of this code assumes we are running */
1329 if (vap->iv_state != IEEE80211_S_RUN)
1330 return;
1331 /*
1332 * Ignore non-mesh STAs.
1333 */
1334 if ((scan.capinfo &
1335 (IEEE80211_CAPINFO_ESS|IEEE80211_CAPINFO_IBSS)) ||
1336 scan.meshid == NULL || scan.meshconf == NULL) {
1337 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1338 wh, "beacon", "%s", "not a mesh sta");
1339 vap->iv_stats.is_mesh_wrongmesh++;
1340 return;
1341 }
1342 /*
1343 * Ignore STAs for other mesh networks.
1344 */
1345 if (memcmp(scan.meshid+2, ms->ms_id, ms->ms_idlen) != 0 ||
1346 mesh_verify_meshconf(vap, scan.meshconf)) {
1347 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1348 wh, "beacon", "%s", "not for our mesh");
1349 vap->iv_stats.is_mesh_wrongmesh++;
1350 return;
1351 }
1352 /*
1353 * Peer only based on the current ACL policy.
1354 */
1355 if (vap->iv_acl != NULL &&
1356 !vap->iv_acl->iac_check(vap, wh->i_addr2)) {
1357 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL,
1358 wh, NULL, "%s", "disallowed by ACL");
1359 vap->iv_stats.is_rx_acl++;
1360 return;
1361 }
1362 /*
1363 * Do neighbor discovery.
1364 */
1365 if (!IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_macaddr)) {
1366 /*
1367 * Create a new entry in the neighbor table.
1368 */
1369 ni = ieee80211_add_neighbor(vap, wh, &scan);
1370 }
1371 /*
1372 * Automatically peer with discovered nodes if possible.
1373 * XXX backoff on repeated failure
1374 */
1375 if (ni != vap->iv_bss &&
1376 (ms->ms_flags & IEEE80211_MESHFLAGS_AP) &&
1377 ni->ni_mlstate == IEEE80211_NODE_MESH_IDLE) {
1378 uint16_t args[1];
1379
1380 ni->ni_mlpid = mesh_generateid(vap);
1381 if (ni->ni_mlpid == 0)
1382 return;
1383 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENSNT);
1384 args[0] = ni->ni_mlpid;
1385 ieee80211_send_action(ni,
1386 IEEE80211_ACTION_CAT_MESHPEERING,
1387 IEEE80211_ACTION_MESHPEERING_OPEN, args);
1388 ni->ni_mlrcnt = 0;
1389 mesh_peer_timeout_setup(ni);
1390 }
1391 break;
1392 }
1393 case IEEE80211_FC0_SUBTYPE_PROBE_REQ:
1394 {
1395 uint8_t *ssid, *meshid, *rates, *xrates;
1396 uint8_t *sfrm;
1397
1398 if (vap->iv_state != IEEE80211_S_RUN) {
1399 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1400 wh, NULL, "wrong state %s",
1401 ieee80211_state_name[vap->iv_state]);
1402 vap->iv_stats.is_rx_mgtdiscard++;
1403 return;
1404 }
1405 if (IEEE80211_IS_MULTICAST(wh->i_addr2)) {
1406 /* frame must be directed */
1407 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1408 wh, NULL, "%s", "not unicast");
1409 vap->iv_stats.is_rx_mgtdiscard++; /* XXX stat */
1410 return;
1411 }
1412 /*
1413 * prreq frame format
1414 * [tlv] ssid
1415 * [tlv] supported rates
1416 * [tlv] extended supported rates
1417 * [tlv] mesh id
1418 */
1419 ssid = meshid = rates = xrates = NULL;
1420 sfrm = frm;
1421 while (efrm - frm > 1) {
1422 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return);
1423 switch (*frm) {
1424 case IEEE80211_ELEMID_SSID:
1425 ssid = frm;
1426 break;
1427 case IEEE80211_ELEMID_RATES:
1428 rates = frm;
1429 break;
1430 case IEEE80211_ELEMID_XRATES:
1431 xrates = frm;
1432 break;
1433 case IEEE80211_ELEMID_MESHID:
1434 meshid = frm;
1435 break;
1436 }
1437 frm += frm[2] + 2;
1438 }
1439 IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return);
1440 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return);
1441 if (xrates != NULL)
1442 IEEE80211_VERIFY_ELEMENT(xrates,
1443 IEEE80211_RATE_MAXSIZE - rates[1], return);
1444 if (meshid != NULL) {
1445 IEEE80211_VERIFY_ELEMENT(meshid,
1446 IEEE80211_MESHID_LEN, return);
1447 /* NB: meshid, not ssid */
1448 IEEE80211_VERIFY_SSID(vap->iv_bss, meshid, return);
1449 }
1450
1451 /* XXX find a better class or define it's own */
1452 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_INPUT, wh->i_addr2,
1453 "%s", "recv probe req");
1454 /*
1455 * Some legacy 11b clients cannot hack a complete
1456 * probe response frame. When the request includes
1457 * only a bare-bones rate set, communicate this to
1458 * the transmit side.
1459 */
1460 ieee80211_send_proberesp(vap, wh->i_addr2, 0);
1461 break;
1462 }
1463 case IEEE80211_FC0_SUBTYPE_ACTION:
1464 if (vap->iv_state != IEEE80211_S_RUN) {
1465 vap->iv_stats.is_rx_mgtdiscard++;
1466 break;
1467 }
1468 /*
1469 * We received an action for an unknown neighbor.
1470 * XXX: wait for it to beacon or create ieee80211_node?
1471 */
1472 if (ni == vap->iv_bss) {
1473 IEEE80211_DISCARD(vap, IEEE80211_MSG_MESH,
1474 wh, NULL, "%s", "unknown node");
1475 vap->iv_stats.is_rx_mgtdiscard++;
1476 break;
1477 }
1478 /*
1479 * Discard if not for us.
1480 */
1481 if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) &&
1482 !IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1483 IEEE80211_DISCARD(vap, IEEE80211_MSG_MESH,
1484 wh, NULL, "%s", "not for me");
1485 vap->iv_stats.is_rx_mgtdiscard++;
1486 break;
1487 }
1488 /* XXX parse_action is a bit useless now */
1489 if (ieee80211_parse_action(ni, m0) == 0)
1490 ic->ic_recv_action(ni, wh, frm, efrm);
1491 break;
1492 case IEEE80211_FC0_SUBTYPE_AUTH:
1493 case IEEE80211_FC0_SUBTYPE_ASSOC_REQ:
1494 case IEEE80211_FC0_SUBTYPE_REASSOC_REQ:
1495 case IEEE80211_FC0_SUBTYPE_ASSOC_RESP:
1496 case IEEE80211_FC0_SUBTYPE_REASSOC_RESP:
1497 case IEEE80211_FC0_SUBTYPE_DEAUTH:
1498 case IEEE80211_FC0_SUBTYPE_DISASSOC:
1499 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1500 wh, NULL, "%s", "not handled");
1501 vap->iv_stats.is_rx_mgtdiscard++;
1502 return;
1503 default:
1504 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1505 wh, "mgt", "subtype 0x%x not handled", subtype);
1506 vap->iv_stats.is_rx_badsubtype++;
1507 break;
1508 }
1509}
1510
1511/*
1512 * Parse meshpeering action ie's for open+confirm frames; the
1513 * important bits are returned in the supplied structure.
1514 */
1515static const struct ieee80211_meshpeer_ie *
1516mesh_parse_meshpeering_action(struct ieee80211_node *ni,
1517 const struct ieee80211_frame *wh, /* XXX for VERIFY_LENGTH */
1518 const uint8_t *frm, const uint8_t *efrm,
1519 struct ieee80211_meshpeer_ie *mp, uint8_t subtype)
1520{
1521 struct ieee80211vap *vap = ni->ni_vap;
1522 const struct ieee80211_meshpeer_ie *mpie;
1523 const uint8_t *meshid, *meshconf, *meshpeer;
1524
1525 meshid = meshconf = meshpeer = NULL;
1526 while (efrm - frm > 1) {
1527 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return NULL);
1528 switch (*frm) {
1529 case IEEE80211_ELEMID_MESHID:
1530 meshid = frm;
1531 break;
1532 case IEEE80211_ELEMID_MESHCONF:
1533 meshconf = frm;
1534 break;
1535 case IEEE80211_ELEMID_MESHPEER:
1536 meshpeer = frm;
1537 mpie = (const struct ieee80211_meshpeer_ie *) frm;
1538 memset(mp, 0, sizeof(*mp));
1539 mp->peer_llinkid = LE_READ_2(&mpie->peer_llinkid);
1540 /* NB: peer link ID is optional on these frames */
1541 if (subtype == IEEE80211_MESH_PEER_LINK_CLOSE &&
1542 mpie->peer_len == 8) {
1543 mp->peer_linkid = 0;
1544 mp->peer_rcode = LE_READ_2(&mpie->peer_linkid);
1545 } else {
1546 mp->peer_linkid = LE_READ_2(&mpie->peer_linkid);
1547 mp->peer_rcode = LE_READ_2(&mpie->peer_rcode);
1548 }
1549 break;
1550 }
1551 frm += frm[1] + 2;
1552 }
1553
1554 /*
1555 * Verify the contents of the frame. Action frames with
1556 * close subtype don't have a Mesh Configuration IE.
1557 * If if fails validation, close the peer link.
1558 */
1559 KASSERT(meshpeer != NULL &&
1560 subtype != IEEE80211_ACTION_MESHPEERING_CLOSE,
1561 ("parsing close action"));
1562
1563 if (mesh_verify_meshid(vap, meshid) ||
1564 mesh_verify_meshpeer(vap, subtype, meshpeer) ||
1565 mesh_verify_meshconf(vap, meshconf)) {
1566 uint16_t args[3];
1567
1568 IEEE80211_DISCARD(vap,
1569 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
1570 wh, NULL, "%s", "not for our mesh");
1571 vap->iv_stats.is_rx_mgtdiscard++;
1572 switch (ni->ni_mlstate) {
1573 case IEEE80211_NODE_MESH_IDLE:
1574 case IEEE80211_NODE_MESH_ESTABLISHED:
1575 case IEEE80211_NODE_MESH_HOLDING:
1576 /* ignore */
1577 break;
1578 case IEEE80211_NODE_MESH_OPENSNT:
1579 case IEEE80211_NODE_MESH_OPENRCV:
1580 case IEEE80211_NODE_MESH_CONFIRMRCV:
1581 args[0] = ni->ni_mlpid;
1582 args[1] = ni->ni_mllid;
1583 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
1584 ieee80211_send_action(ni,
1585 IEEE80211_ACTION_CAT_MESHPEERING,
1586 IEEE80211_ACTION_MESHPEERING_CLOSE,
1587 args);
1588 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
1589 mesh_peer_timeout_setup(ni);
1590 break;
1591 }
1592 return NULL;
1593 }
1594 return (const struct ieee80211_meshpeer_ie *) mp;
1595}
1596
1597static int
1598mesh_recv_action_meshpeering_open(struct ieee80211_node *ni,
1599 const struct ieee80211_frame *wh,
1600 const uint8_t *frm, const uint8_t *efrm)
1601{
1602 struct ieee80211vap *vap = ni->ni_vap;
1603 struct ieee80211_meshpeer_ie ie;
1604 const struct ieee80211_meshpeer_ie *meshpeer;
1605 uint16_t args[3];
1606
1607 /* +2+2 for action + code + capabilites */
1608 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2, efrm, &ie,
1609 IEEE80211_ACTION_MESHPEERING_OPEN);
1610 if (meshpeer == NULL) {
1611 return 0;
1612 }
1613
1614 /* XXX move up */
1615 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
1616 "recv PEER OPEN, lid 0x%x", meshpeer->peer_llinkid);
1617
1618 switch (ni->ni_mlstate) {
1619 case IEEE80211_NODE_MESH_IDLE:
1620 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV);
1621 ni->ni_mllid = meshpeer->peer_llinkid;
1622 ni->ni_mlpid = mesh_generateid(vap);
1623 if (ni->ni_mlpid == 0)
1624 return 0; /* XXX */
1625 args[0] = ni->ni_mlpid;
1626 /* Announce we're open too... */
1627 ieee80211_send_action(ni,
1628 IEEE80211_ACTION_CAT_MESHPEERING,
1629 IEEE80211_ACTION_MESHPEERING_OPEN, args);
1630 /* ...and confirm the link. */
1631 args[0] = ni->ni_mlpid;
1632 args[1] = ni->ni_mllid;
1633 ieee80211_send_action(ni,
1634 IEEE80211_ACTION_CAT_MESHPEERING,
1635 IEEE80211_ACTION_MESHPEERING_CONFIRM,
1636 args);
1637 mesh_peer_timeout_setup(ni);
1638 break;
1639 case IEEE80211_NODE_MESH_OPENRCV:
1640 /* Wrong Link ID */
1641 if (ni->ni_mllid != meshpeer->peer_llinkid) {
1642 args[0] = ni->ni_mllid;
1643 args[1] = ni->ni_mlpid;
1644 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
1645 ieee80211_send_action(ni,
1646 IEEE80211_ACTION_CAT_MESHPEERING,
1647 IEEE80211_ACTION_MESHPEERING_CLOSE,
1648 args);
1649 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
1650 mesh_peer_timeout_setup(ni);
1651 break;
1652 }
1653 /* Duplicate open, confirm again. */
1654 args[0] = ni->ni_mlpid;
1655 args[1] = ni->ni_mllid;
1656 ieee80211_send_action(ni,
1657 IEEE80211_ACTION_CAT_MESHPEERING,
1658 IEEE80211_ACTION_MESHPEERING_CONFIRM,
1659 args);
1660 break;
1661 case IEEE80211_NODE_MESH_OPENSNT:
1662 ni->ni_mllid = meshpeer->peer_llinkid;
1663 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV);
1664 args[0] = ni->ni_mlpid;
1665 args[1] = ni->ni_mllid;
1666 ieee80211_send_action(ni,
1667 IEEE80211_ACTION_CAT_MESHPEERING,
1668 IEEE80211_ACTION_MESHPEERING_CONFIRM,
1669 args);
1670 /* NB: don't setup/clear any timeout */
1671 break;
1672 case IEEE80211_NODE_MESH_CONFIRMRCV:
1673 if (ni->ni_mlpid != meshpeer->peer_linkid ||
1674 ni->ni_mllid != meshpeer->peer_llinkid) {
1675 args[0] = ni->ni_mlpid;
1676 args[1] = ni->ni_mllid;
1677 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
1678 ieee80211_send_action(ni,
1679 IEEE80211_ACTION_CAT_MESHPEERING,
1680 IEEE80211_ACTION_MESHPEERING_CLOSE,
1681 args);
1682 mesh_linkchange(ni,
1683 IEEE80211_NODE_MESH_HOLDING);
1684 mesh_peer_timeout_setup(ni);
1685 break;
1686 }
1687 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED);
1688 ni->ni_mllid = meshpeer->peer_llinkid;
1689 args[0] = ni->ni_mlpid;
1690 args[1] = ni->ni_mllid;
1691 ieee80211_send_action(ni,
1692 IEEE80211_ACTION_CAT_MESHPEERING,
1693 IEEE80211_ACTION_MESHPEERING_CONFIRM,
1694 args);
1695 mesh_peer_timeout_stop(ni);
1696 break;
1697 case IEEE80211_NODE_MESH_ESTABLISHED:
1698 if (ni->ni_mllid != meshpeer->peer_llinkid) {
1699 args[0] = ni->ni_mllid;
1700 args[1] = ni->ni_mlpid;
1701 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
1702 ieee80211_send_action(ni,
1703 IEEE80211_ACTION_CAT_MESHPEERING,
1704 IEEE80211_ACTION_MESHPEERING_CLOSE,
1705 args);
1706 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
1707 mesh_peer_timeout_setup(ni);
1708 break;
1709 }
1710 args[0] = ni->ni_mlpid;
1711 args[1] = ni->ni_mllid;
1712 ieee80211_send_action(ni,
1713 IEEE80211_ACTION_CAT_MESHPEERING,
1714 IEEE80211_ACTION_MESHPEERING_CONFIRM,
1715 args);
1716 break;
1717 case IEEE80211_NODE_MESH_HOLDING:
1718 args[0] = ni->ni_mlpid;
1719 args[1] = meshpeer->peer_llinkid;
1720 args[2] = IEEE80211_REASON_MESH_MAX_RETRIES;
1721 ieee80211_send_action(ni,
1722 IEEE80211_ACTION_CAT_MESHPEERING,
1723 IEEE80211_ACTION_MESHPEERING_CLOSE,
1724 args);
1725 break;
1726 }
1727 return 0;
1728}
1729
1730static int
1731mesh_recv_action_meshpeering_confirm(struct ieee80211_node *ni,
1732 const struct ieee80211_frame *wh,
1733 const uint8_t *frm, const uint8_t *efrm)
1734{
1735 struct ieee80211vap *vap = ni->ni_vap;
1736 struct ieee80211_meshpeer_ie ie;
1737 const struct ieee80211_meshpeer_ie *meshpeer;
1738 uint16_t args[3];
1739
1740 /* +2+2+2+2 for action + code + capabilites + status code + AID */
1741 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2+2+2, efrm, &ie,
1742 IEEE80211_ACTION_MESHPEERING_CONFIRM);
1743 if (meshpeer == NULL) {
1744 return 0;
1745 }
1746
1747 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
1748 "recv PEER CONFIRM, local id 0x%x, peer id 0x%x",
1749 meshpeer->peer_llinkid, meshpeer->peer_linkid);
1750
1751 switch (ni->ni_mlstate) {
1752 case IEEE80211_NODE_MESH_OPENRCV:
1753 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED);
1754 mesh_peer_timeout_stop(ni);
1755 break;
1756 case IEEE80211_NODE_MESH_OPENSNT:
1757 mesh_linkchange(ni, IEEE80211_NODE_MESH_CONFIRMRCV);
1758 break;
1759 case IEEE80211_NODE_MESH_HOLDING:
1760 args[0] = ni->ni_mlpid;
1761 args[1] = meshpeer->peer_llinkid;
1762 args[2] = IEEE80211_REASON_MESH_MAX_RETRIES;
1763 ieee80211_send_action(ni,
1764 IEEE80211_ACTION_CAT_MESHPEERING,
1765 IEEE80211_ACTION_MESHPEERING_CLOSE,
1766 args);
1767 break;
1768 case IEEE80211_NODE_MESH_CONFIRMRCV:
1769 if (ni->ni_mllid != meshpeer->peer_llinkid) {
1770 args[0] = ni->ni_mlpid;
1771 args[1] = ni->ni_mllid;
1772 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
1773 ieee80211_send_action(ni,
1774 IEEE80211_ACTION_CAT_MESHPEERING,
1775 IEEE80211_ACTION_MESHPEERING_CLOSE,
1776 args);
1777 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
1778 mesh_peer_timeout_setup(ni);
1779 }
1780 break;
1781 default:
1782 IEEE80211_DISCARD(vap,
1783 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
1784 wh, NULL, "received confirm in invalid state %d",
1785 ni->ni_mlstate);
1786 vap->iv_stats.is_rx_mgtdiscard++;
1787 break;
1788 }
1789 return 0;
1790}
1791
1792static int
1793mesh_recv_action_meshpeering_close(struct ieee80211_node *ni,
1794 const struct ieee80211_frame *wh,
1795 const uint8_t *frm, const uint8_t *efrm)
1796{
1797 uint16_t args[3];
1798
1799 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
1800 ni, "%s", "recv PEER CLOSE");
1801
1802 switch (ni->ni_mlstate) {
1803 case IEEE80211_NODE_MESH_IDLE:
1804 /* ignore */
1805 break;
1806 case IEEE80211_NODE_MESH_OPENRCV:
1807 case IEEE80211_NODE_MESH_OPENSNT:
1808 case IEEE80211_NODE_MESH_CONFIRMRCV:
1809 case IEEE80211_NODE_MESH_ESTABLISHED:
1810 args[0] = ni->ni_mlpid;
1811 args[1] = ni->ni_mllid;
1812 args[2] = IEEE80211_REASON_MESH_CLOSE_RCVD;
1813 ieee80211_send_action(ni,
1814 IEEE80211_ACTION_CAT_MESHPEERING,
1815 IEEE80211_ACTION_MESHPEERING_CLOSE,
1816 args);
1817 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
1818 mesh_peer_timeout_setup(ni);
1819 break;
1820 case IEEE80211_NODE_MESH_HOLDING:
1821 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE);
1822 mesh_peer_timeout_setup(ni);
1823 break;
1824 }
1825 return 0;
1826}
1827
1828/*
1829 * Link Metric handling.
1830 */
1831static int
1832mesh_recv_action_meshlmetric_req(struct ieee80211_node *ni,
1833 const struct ieee80211_frame *wh,
1834 const uint8_t *frm, const uint8_t *efrm)
1835{
1836 uint32_t metric;
1837
1838 metric = mesh_airtime_calc(ni);
1839 ieee80211_send_action(ni,
1840 IEEE80211_ACTION_CAT_MESHLMETRIC,
1841 IEEE80211_ACTION_MESHLMETRIC_REP,
1842 &metric);
1843 return 0;
1844}
1845
1846static int
1847mesh_recv_action_meshlmetric_rep(struct ieee80211_node *ni,
1848 const struct ieee80211_frame *wh,
1849 const uint8_t *frm, const uint8_t *efrm)
1850{
1851 return 0;
1852}
1853
1854static int
1855mesh_send_action(struct ieee80211_node *ni, struct mbuf *m)
1856{
1857 struct ieee80211_bpf_params params;
1858
1859 memset(&params, 0, sizeof(params));
1860 params.ibp_pri = WME_AC_VO;
1861 params.ibp_rate0 = ni->ni_txparms->mgmtrate;
1862 /* XXX ucast/mcast */
1863 params.ibp_try0 = ni->ni_txparms->maxretry;
1864 params.ibp_power = ni->ni_txpower;
1865 return ieee80211_mgmt_output(ni, m, IEEE80211_FC0_SUBTYPE_ACTION,
1866 &params);
1867}
1868
1869#define ADDSHORT(frm, v) do { \
1870 frm[0] = (v) & 0xff; \
1871 frm[1] = (v) >> 8; \
1872 frm += 2; \
1873} while (0)
1874#define ADDWORD(frm, v) do { \
1875 frm[0] = (v) & 0xff; \
1876 frm[1] = ((v) >> 8) & 0xff; \
1877 frm[2] = ((v) >> 16) & 0xff; \
1878 frm[3] = ((v) >> 24) & 0xff; \
1879 frm += 4; \
1880} while (0)
1881
1882static int
1883mesh_send_action_meshpeering_open(struct ieee80211_node *ni,
1884 int category, int action, void *args0)
1885{
1886 struct ieee80211vap *vap = ni->ni_vap;
1887 struct ieee80211com *ic = ni->ni_ic;
1888 uint16_t *args = args0;
1889 const struct ieee80211_rateset *rs;
1890 struct mbuf *m;
1891 uint8_t *frm;
1892
1893 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
1894 "send PEER OPEN action: localid 0x%x", args[0]);
1895
1896 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
6168f72e
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1897 "ieee80211_ref_node (%s:%u) %p<%6D> refcnt %d\n", __func__, __LINE__,
1898 ni, ni->ni_macaddr, ":", ieee80211_node_refcnt(ni)+1);
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1899 ieee80211_ref_node(ni);
1900
1901 m = ieee80211_getmgtframe(&frm,
1902 ic->ic_headroom + sizeof(struct ieee80211_frame),
1903 sizeof(uint16_t) /* action+category */
1904 + sizeof(uint16_t) /* capabilites */
1905 + 2 + IEEE80211_RATE_SIZE
1906 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
1907 + 2 + IEEE80211_MESHID_LEN
1908 + sizeof(struct ieee80211_meshconf_ie)
1909 + sizeof(struct ieee80211_meshpeer_ie)
1910 );
1911 if (m != NULL) {
1912 /*
1913 * mesh peer open action frame format:
1914 * [1] category
1915 * [1] action
1916 * [2] capabilities
1917 * [tlv] rates
1918 * [tlv] xrates
1919 * [tlv] mesh id
1920 * [tlv] mesh conf
1921 * [tlv] mesh peer link mgmt
1922 */
1923 *frm++ = category;
1924 *frm++ = action;
1925 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan));
1926 rs = ieee80211_get_suprates(ic, ic->ic_curchan);
1927 frm = ieee80211_add_rates(frm, rs);
1928 frm = ieee80211_add_xrates(frm, rs);
1929 frm = ieee80211_add_meshid(frm, vap);
1930 frm = ieee80211_add_meshconf(frm, vap);
1931 frm = ieee80211_add_meshpeer(frm, IEEE80211_MESH_PEER_LINK_OPEN,
1932 args[0], 0, 0);
1933 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
1934 return mesh_send_action(ni, m);
1935 } else {
1936 vap->iv_stats.is_tx_nobuf++;
1937 ieee80211_free_node(ni);
1938 return ENOMEM;
1939 }
1940}
1941
1942static int
1943mesh_send_action_meshpeering_confirm(struct ieee80211_node *ni,
1944 int category, int action, void *args0)
1945{
1946 struct ieee80211vap *vap = ni->ni_vap;
1947 struct ieee80211com *ic = ni->ni_ic;
1948 uint16_t *args = args0;
1949 const struct ieee80211_rateset *rs;
1950 struct mbuf *m;
1951 uint8_t *frm;
1952
1953 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
1954 "send PEER CONFIRM action: localid 0x%x, peerid 0x%x",
1955 args[0], args[1]);
1956
1957 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
6168f72e
RP
1958 "ieee80211_ref_node (%s:%u) %p<%6D> refcnt %d\n", __func__, __LINE__,
1959 ni, ni->ni_macaddr, ":", ieee80211_node_refcnt(ni)+1);
32176cfd
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1960 ieee80211_ref_node(ni);
1961
1962 m = ieee80211_getmgtframe(&frm,
1963 ic->ic_headroom + sizeof(struct ieee80211_frame),
1964 sizeof(uint16_t) /* action+category */
1965 + sizeof(uint16_t) /* capabilites */
1966 + sizeof(uint16_t) /* status code */
1967 + sizeof(uint16_t) /* AID */
1968 + 2 + IEEE80211_RATE_SIZE
1969 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
1970 + 2 + IEEE80211_MESHID_LEN
1971 + sizeof(struct ieee80211_meshconf_ie)
1972 + sizeof(struct ieee80211_meshpeer_ie)
1973 );
1974 if (m != NULL) {
1975 /*
1976 * mesh peer confirm action frame format:
1977 * [1] category
1978 * [1] action
1979 * [2] capabilities
1980 * [2] status code
1981 * [2] association id (peer ID)
1982 * [tlv] rates
1983 * [tlv] xrates
1984 * [tlv] mesh id
1985 * [tlv] mesh conf
1986 * [tlv] mesh peer link mgmt
1987 */
1988 *frm++ = category;
1989 *frm++ = action;
1990 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan));
1991 ADDSHORT(frm, 0); /* status code */
1992 ADDSHORT(frm, args[1]); /* AID */
1993 rs = ieee80211_get_suprates(ic, ic->ic_curchan);
1994 frm = ieee80211_add_rates(frm, rs);
1995 frm = ieee80211_add_xrates(frm, rs);
1996 frm = ieee80211_add_meshid(frm, vap);
1997 frm = ieee80211_add_meshconf(frm, vap);
1998 frm = ieee80211_add_meshpeer(frm,
1999 IEEE80211_MESH_PEER_LINK_CONFIRM,
2000 args[0], args[1], 0);
2001 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2002 return mesh_send_action(ni, m);
2003 } else {
2004 vap->iv_stats.is_tx_nobuf++;
2005 ieee80211_free_node(ni);
2006 return ENOMEM;
2007 }
2008}
2009
2010static int
2011mesh_send_action_meshpeering_close(struct ieee80211_node *ni,
2012 int category, int action, void *args0)
2013{
2014 struct ieee80211vap *vap = ni->ni_vap;
2015 struct ieee80211com *ic = ni->ni_ic;
2016 uint16_t *args = args0;
2017 struct mbuf *m;
2018 uint8_t *frm;
2019
2020 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2021 "send PEER CLOSE action: localid 0x%x, peerid 0x%x reason %d",
2022 args[0], args[1], args[2]);
2023
2024 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
6168f72e
RP
2025 "ieee80211_ref_node (%s:%u) %p<%6D> refcnt %d\n", __func__, __LINE__,
2026 ni, ni->ni_macaddr, ieee80211_node_refcnt(ni)+1);
32176cfd
RP
2027 ieee80211_ref_node(ni);
2028
2029 m = ieee80211_getmgtframe(&frm,
2030 ic->ic_headroom + sizeof(struct ieee80211_frame),
2031 sizeof(uint16_t) /* action+category */
2032 + sizeof(uint16_t) /* reason code */
2033 + 2 + IEEE80211_MESHID_LEN
2034 + sizeof(struct ieee80211_meshpeer_ie)
2035 );
2036 if (m != NULL) {
2037 /*
2038 * mesh peer close action frame format:
2039 * [1] category
2040 * [1] action
2041 * [2] reason code
2042 * [tlv] mesh id
2043 * [tlv] mesh peer link mgmt
2044 */
2045 *frm++ = category;
2046 *frm++ = action;
2047 ADDSHORT(frm, args[2]); /* reason code */
2048 frm = ieee80211_add_meshid(frm, vap);
2049 frm = ieee80211_add_meshpeer(frm,
2050 IEEE80211_MESH_PEER_LINK_CLOSE,
2051 args[0], args[1], args[2]);
2052 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2053 return mesh_send_action(ni, m);
2054 } else {
2055 vap->iv_stats.is_tx_nobuf++;
2056 ieee80211_free_node(ni);
2057 return ENOMEM;
2058 }
2059}
2060
2061static int
2062mesh_send_action_meshlink_request(struct ieee80211_node *ni,
2063 int category, int action, void *arg0)
2064{
2065 struct ieee80211vap *vap = ni->ni_vap;
2066 struct ieee80211com *ic = ni->ni_ic;
2067 struct mbuf *m;
2068 uint8_t *frm;
2069
2070 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2071 "%s", "send LINK METRIC REQUEST action");
2072
2073 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
6168f72e
RP
2074 "ieee80211_ref_node (%s:%u) %p<%6D> refcnt %d\n", __func__, __LINE__,
2075 ni, ni->ni_macaddr, ":", ieee80211_node_refcnt(ni)+1);
32176cfd
RP
2076 ieee80211_ref_node(ni);
2077
2078 m = ieee80211_getmgtframe(&frm,
2079 ic->ic_headroom + sizeof(struct ieee80211_frame),
2080 sizeof(uint16_t) /* action+category */
2081 );
2082 if (m != NULL) {
2083 /*
2084 * mesh link metric request
2085 * [1] category
2086 * [1] action
2087 */
2088 *frm++ = category;
2089 *frm++ = action;
2090 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2091 return mesh_send_action(ni, m);
2092 } else {
2093 vap->iv_stats.is_tx_nobuf++;
2094 ieee80211_free_node(ni);
2095 return ENOMEM;
2096 }
2097}
2098
2099static int
2100mesh_send_action_meshlink_reply(struct ieee80211_node *ni,
2101 int category, int action, void *args0)
2102{
2103 struct ieee80211vap *vap = ni->ni_vap;
2104 struct ieee80211com *ic = ni->ni_ic;
2105 uint32_t *metric = args0;
2106 struct mbuf *m;
2107 uint8_t *frm;
2108
2109 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2110 "send LINK METRIC REPLY action: metric 0x%x", *metric);
2111
2112 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
6168f72e
RP
2113 "ieee80211_ref_node (%s:%u) %p<%6D> refcnt %d\n", __func__, __LINE__,
2114 ni, ni->ni_macaddr, ":", ieee80211_node_refcnt(ni)+1);
32176cfd
RP
2115 ieee80211_ref_node(ni);
2116
2117 m = ieee80211_getmgtframe(&frm,
2118 ic->ic_headroom + sizeof(struct ieee80211_frame),
2119 sizeof(uint16_t) /* action+category */
2120 + sizeof(struct ieee80211_meshlmetric_ie)
2121 );
2122 if (m != NULL) {
2123 /*
2124 * mesh link metric reply
2125 * [1] category
2126 * [1] action
2127 * [tlv] mesh link metric
2128 */
2129 *frm++ = category;
2130 *frm++ = action;
2131 frm = ieee80211_add_meshlmetric(frm, *metric);
2132 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2133 return mesh_send_action(ni, m);
2134 } else {
2135 vap->iv_stats.is_tx_nobuf++;
2136 ieee80211_free_node(ni);
2137 return ENOMEM;
2138 }
2139}
2140
2141static void
2142mesh_peer_timeout_setup(struct ieee80211_node *ni)
2143{
2144 switch (ni->ni_mlstate) {
2145 case IEEE80211_NODE_MESH_HOLDING:
2146 ni->ni_mltval = ieee80211_mesh_holdingtimeout;
2147 break;
2148 case IEEE80211_NODE_MESH_CONFIRMRCV:
2149 ni->ni_mltval = ieee80211_mesh_confirmtimeout;
2150 break;
2151 case IEEE80211_NODE_MESH_IDLE:
2152 ni->ni_mltval = 0;
2153 break;
2154 default:
2155 ni->ni_mltval = ieee80211_mesh_retrytimeout;
2156 break;
2157 }
2158 if (ni->ni_mltval)
2159 callout_reset(&ni->ni_mltimer, ni->ni_mltval,
2160 mesh_peer_timeout_cb, ni);
2161}
2162
2163/*
2164 * Same as above but backoffs timer statisically 50%.
2165 */
2166static void
2167mesh_peer_timeout_backoff(struct ieee80211_node *ni)
2168{
2169 uint32_t r;
2170
2171 r = karc4random();
2172 ni->ni_mltval += r % ni->ni_mltval;
2173 callout_reset(&ni->ni_mltimer, ni->ni_mltval, mesh_peer_timeout_cb,
2174 ni);
2175}
2176
2177static __inline void
2178mesh_peer_timeout_stop(struct ieee80211_node *ni)
2179{
dfcf81fd 2180 callout_stop(&ni->ni_mltimer);
32176cfd
RP
2181}
2182
2183/*
2184 * Mesh Peer Link Management FSM timeout handling.
2185 */
2186static void
2187mesh_peer_timeout_cb(void *arg)
2188{
2189 struct ieee80211_node *ni = (struct ieee80211_node *)arg;
2190 uint16_t args[3];
2191
2192 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_MESH,
2193 ni, "mesh link timeout, state %d, retry counter %d",
2194 ni->ni_mlstate, ni->ni_mlrcnt);
2195
2196 switch (ni->ni_mlstate) {
2197 case IEEE80211_NODE_MESH_IDLE:
2198 case IEEE80211_NODE_MESH_ESTABLISHED:
2199 break;
2200 case IEEE80211_NODE_MESH_OPENSNT:
2201 case IEEE80211_NODE_MESH_OPENRCV:
2202 if (ni->ni_mlrcnt == ieee80211_mesh_maxretries) {
2203 args[0] = ni->ni_mlpid;
2204 args[2] = IEEE80211_REASON_MESH_MAX_RETRIES;
2205 ieee80211_send_action(ni,
2206 IEEE80211_ACTION_CAT_MESHPEERING,
2207 IEEE80211_ACTION_MESHPEERING_CLOSE, args);
2208 ni->ni_mlrcnt = 0;
2209 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2210 mesh_peer_timeout_setup(ni);
2211 } else {
2212 args[0] = ni->ni_mlpid;
2213 ieee80211_send_action(ni,
2214 IEEE80211_ACTION_CAT_MESHPEERING,
2215 IEEE80211_ACTION_MESHPEERING_OPEN, args);
2216 ni->ni_mlrcnt++;
2217 mesh_peer_timeout_backoff(ni);
2218 }
2219 break;
2220 case IEEE80211_NODE_MESH_CONFIRMRCV:
2221 if (ni->ni_mlrcnt == ieee80211_mesh_maxretries) {
2222 args[0] = ni->ni_mlpid;
2223 args[2] = IEEE80211_REASON_MESH_CONFIRM_TIMEOUT;
2224 ieee80211_send_action(ni,
2225 IEEE80211_ACTION_CAT_MESHPEERING,
2226 IEEE80211_ACTION_MESHPEERING_CLOSE, args);
2227 ni->ni_mlrcnt = 0;
2228 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2229 mesh_peer_timeout_setup(ni);
2230 } else {
2231 ni->ni_mlrcnt++;
2232 mesh_peer_timeout_setup(ni);
2233 }
2234 break;
2235 case IEEE80211_NODE_MESH_HOLDING:
2236 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE);
2237 break;
2238 }
2239}
2240
2241static int
2242mesh_verify_meshid(struct ieee80211vap *vap, const uint8_t *ie)
2243{
2244 struct ieee80211_mesh_state *ms = vap->iv_mesh;
2245
2246 if (ie == NULL || ie[1] != ms->ms_idlen)
2247 return 1;
2248 return memcmp(ms->ms_id, ie + 2, ms->ms_idlen);
2249}
2250
2251/*
2252 * Check if we are using the same algorithms for this mesh.
2253 */
2254static int
2255mesh_verify_meshconf(struct ieee80211vap *vap, const uint8_t *ie)
2256{
2257 const struct ieee80211_meshconf_ie *meshconf =
2258 (const struct ieee80211_meshconf_ie *) ie;
2259 const struct ieee80211_mesh_state *ms = vap->iv_mesh;
2260 uint16_t cap;
2261
2262 if (meshconf == NULL)
2263 return 1;
2264 if (meshconf->conf_pselid != ms->ms_ppath->mpp_ie) {
2265 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
2266 "unknown path selection algorithm: 0x%x\n",
2267 meshconf->conf_pselid);
2268 return 1;
2269 }
2270 if (meshconf->conf_pmetid != ms->ms_pmetric->mpm_ie) {
2271 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
2272 "unknown path metric algorithm: 0x%x\n",
2273 meshconf->conf_pmetid);
2274 return 1;
2275 }
2276 if (meshconf->conf_ccid != 0) {
2277 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
2278 "unknown congestion control algorithm: 0x%x\n",
2279 meshconf->conf_ccid);
2280 return 1;
2281 }
2282 if (meshconf->conf_syncid != IEEE80211_MESHCONF_SYNC_NEIGHOFF) {
2283 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
2284 "unknown sync algorithm: 0x%x\n",
2285 meshconf->conf_syncid);
2286 return 1;
2287 }
2288 if (meshconf->conf_authid != 0) {
2289 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
2290 "unknown auth auth algorithm: 0x%x\n",
2291 meshconf->conf_pselid);
2292 return 1;
2293 }
2294 /* NB: conf_cap is only read correctly here */
2295 cap = LE_READ_2(&meshconf->conf_cap);
2296 /* Not accepting peers */
2297 if (!(cap & IEEE80211_MESHCONF_CAP_AP)) {
2298 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
2299 "not accepting peers: 0x%x\n", meshconf->conf_cap);
2300 return 1;
2301 }
2302 return 0;
2303}
2304
2305static int
2306mesh_verify_meshpeer(struct ieee80211vap *vap, uint8_t subtype,
2307 const uint8_t *ie)
2308{
2309 const struct ieee80211_meshpeer_ie *meshpeer =
2310 (const struct ieee80211_meshpeer_ie *) ie;
2311
2312 if (meshpeer == NULL || meshpeer->peer_len < 6 ||
2313 meshpeer->peer_len > 10)
2314 return 1;
2315 switch (subtype) {
2316 case IEEE80211_MESH_PEER_LINK_OPEN:
2317 if (meshpeer->peer_len != 6)
2318 return 1;
2319 break;
2320 case IEEE80211_MESH_PEER_LINK_CONFIRM:
2321 if (meshpeer->peer_len != 8)
2322 return 1;
2323 break;
2324 case IEEE80211_MESH_PEER_LINK_CLOSE:
2325 if (meshpeer->peer_len < 8)
2326 return 1;
2327 if (meshpeer->peer_len == 8 && meshpeer->peer_linkid != 0)
2328 return 1;
2329 if (meshpeer->peer_rcode == 0)
2330 return 1;
2331 break;
2332 }
2333 return 0;
2334}
2335
2336/*
2337 * Add a Mesh ID IE to a frame.
2338 */
2339uint8_t *
2340ieee80211_add_meshid(uint8_t *frm, struct ieee80211vap *vap)
2341{
2342 struct ieee80211_mesh_state *ms = vap->iv_mesh;
2343
2344 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a mbss vap"));
2345
2346 *frm++ = IEEE80211_ELEMID_MESHID;
2347 *frm++ = ms->ms_idlen;
2348 memcpy(frm, ms->ms_id, ms->ms_idlen);
2349 return frm + ms->ms_idlen;
2350}
2351
2352/*
2353 * Add a Mesh Configuration IE to a frame.
2354 * For now just use HWMP routing, Airtime link metric, Null Congestion
2355 * Signaling, Null Sync Protocol and Null Authentication.
2356 */
2357uint8_t *
2358ieee80211_add_meshconf(uint8_t *frm, struct ieee80211vap *vap)
2359{
2360 const struct ieee80211_mesh_state *ms = vap->iv_mesh;
2361 uint16_t caps;
2362
2363 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap"));
2364
2365 *frm++ = IEEE80211_ELEMID_MESHCONF;
2366 *frm++ = sizeof(struct ieee80211_meshconf_ie) - 2;
2367 *frm++ = ms->ms_ppath->mpp_ie; /* path selection */
2368 *frm++ = ms->ms_pmetric->mpm_ie; /* link metric */
2369 *frm++ = IEEE80211_MESHCONF_CC_DISABLED;
2370 *frm++ = IEEE80211_MESHCONF_SYNC_NEIGHOFF;
2371 *frm++ = IEEE80211_MESHCONF_AUTH_DISABLED;
2372 /* NB: set the number of neighbors before the rest */
2373 *frm = (ms->ms_neighbors > 15 ? 15 : ms->ms_neighbors) << 1;
2374 if (ms->ms_flags & IEEE80211_MESHFLAGS_PORTAL)
2375 *frm |= IEEE80211_MESHCONF_FORM_MP;
2376 frm += 1;
2377 caps = 0;
2378 if (ms->ms_flags & IEEE80211_MESHFLAGS_AP)
2379 caps |= IEEE80211_MESHCONF_CAP_AP;
2380 if (ms->ms_flags & IEEE80211_MESHFLAGS_FWD)
2381 caps |= IEEE80211_MESHCONF_CAP_FWRD;
2382 ADDSHORT(frm, caps);
2383 return frm;
2384}
2385
2386/*
2387 * Add a Mesh Peer Management IE to a frame.
2388 */
2389uint8_t *
2390ieee80211_add_meshpeer(uint8_t *frm, uint8_t subtype, uint16_t localid,
2391 uint16_t peerid, uint16_t reason)
2392{
2393 /* XXX change for AH */
2394 static const uint8_t meshpeerproto[4] = IEEE80211_MESH_PEER_PROTO;
2395
2396 KASSERT(localid != 0, ("localid == 0"));
2397
2398 *frm++ = IEEE80211_ELEMID_MESHPEER;
2399 switch (subtype) {
2400 case IEEE80211_MESH_PEER_LINK_OPEN:
2401 *frm++ = 6; /* length */
2402 memcpy(frm, meshpeerproto, 4);
2403 frm += 4;
2404 ADDSHORT(frm, localid); /* local ID */
2405 break;
2406 case IEEE80211_MESH_PEER_LINK_CONFIRM:
2407 KASSERT(peerid != 0, ("sending peer confirm without peer id"));
2408 *frm++ = 8; /* length */
2409 memcpy(frm, meshpeerproto, 4);
2410 frm += 4;
2411 ADDSHORT(frm, localid); /* local ID */
2412 ADDSHORT(frm, peerid); /* peer ID */
2413 break;
2414 case IEEE80211_MESH_PEER_LINK_CLOSE:
2415 if (peerid)
2416 *frm++ = 10; /* length */
2417 else
2418 *frm++ = 8; /* length */
2419 memcpy(frm, meshpeerproto, 4);
2420 frm += 4;
2421 ADDSHORT(frm, localid); /* local ID */
2422 if (peerid)
2423 ADDSHORT(frm, peerid); /* peer ID */
2424 ADDSHORT(frm, reason);
2425 break;
2426 }
2427 return frm;
2428}
2429
2430/*
2431 * Compute an Airtime Link Metric for the link with this node.
2432 *
2433 * Based on Draft 3.0 spec (11B.10, p.149).
2434 */
2435/*
2436 * Max 802.11s overhead.
2437 */
2438#define IEEE80211_MESH_MAXOVERHEAD \
2439 (sizeof(struct ieee80211_qosframe_addr4) \
2440 + sizeof(struct ieee80211_meshcntl_ae11) \
2441 + sizeof(struct llc) \
2442 + IEEE80211_ADDR_LEN \
2443 + IEEE80211_WEP_IVLEN \
2444 + IEEE80211_WEP_KIDLEN \
2445 + IEEE80211_WEP_CRCLEN \
2446 + IEEE80211_WEP_MICLEN \
2447 + IEEE80211_CRC_LEN)
2448uint32_t
2449mesh_airtime_calc(struct ieee80211_node *ni)
2450{
2451#define M_BITS 8
2452#define S_FACTOR (2 * M_BITS)
2453 struct ieee80211com *ic = ni->ni_ic;
2454 struct ifnet *ifp = ni->ni_vap->iv_ifp;
2455 const static int nbits = 8192 << M_BITS;
2456 uint32_t overhead, rate, errrate;
2457 uint64_t res;
2458
2459 /* Time to transmit a frame */
2460 rate = ni->ni_txrate;
2461 overhead = ieee80211_compute_duration(ic->ic_rt,
2462 ifp->if_mtu + IEEE80211_MESH_MAXOVERHEAD, rate, 0) << M_BITS;
2463 /* Error rate in percentage */
2464 /* XXX assuming small failures are ok */
2465 errrate = (((ifp->if_oerrors +
2466 ifp->if_ierrors) / 100) << M_BITS) / 100;
2467 res = (overhead + (nbits / rate)) *
2468 ((1 << S_FACTOR) / ((1 << M_BITS) - errrate));
2469
2470 return (uint32_t)(res >> S_FACTOR);
2471#undef M_BITS
2472#undef S_FACTOR
2473}
2474
2475/*
2476 * Add a Mesh Link Metric report IE to a frame.
2477 */
2478uint8_t *
2479ieee80211_add_meshlmetric(uint8_t *frm, uint32_t metric)
2480{
2481 *frm++ = IEEE80211_ELEMID_MESHLINK;
2482 *frm++ = 4;
2483 ADDWORD(frm, metric);
2484 return frm;
2485}
2486#undef ADDSHORT
2487#undef ADDWORD
2488
2489/*
2490 * Initialize any mesh-specific node state.
2491 */
2492void
2493ieee80211_mesh_node_init(struct ieee80211vap *vap, struct ieee80211_node *ni)
2494{
2495 ni->ni_flags |= IEEE80211_NODE_QOS;
34a60cf6 2496 callout_init_mp(&ni->ni_mltimer);
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2497}
2498
2499/*
2500 * Cleanup any mesh-specific node state.
2501 */
2502void
2503ieee80211_mesh_node_cleanup(struct ieee80211_node *ni)
2504{
2505 struct ieee80211vap *vap = ni->ni_vap;
2506 struct ieee80211_mesh_state *ms = vap->iv_mesh;
2507
dfcf81fd 2508 callout_stop(&ni->ni_mltimer);
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2509 /* NB: short-circuit callbacks after mesh_vdetach */
2510 if (vap->iv_mesh != NULL)
2511 ms->ms_ppath->mpp_peerdown(ni);
2512}
2513
2514void
2515ieee80211_parse_meshid(struct ieee80211_node *ni, const uint8_t *ie)
2516{
2517 ni->ni_meshidlen = ie[1];
2518 memcpy(ni->ni_meshid, ie + 2, ie[1]);
2519}
2520
2521/*
2522 * Setup mesh-specific node state on neighbor discovery.
2523 */
2524void
2525ieee80211_mesh_init_neighbor(struct ieee80211_node *ni,
2526 const struct ieee80211_frame *wh,
2527 const struct ieee80211_scanparams *sp)
2528{
2529 ieee80211_parse_meshid(ni, sp->meshid);
2530}
2531
2532void
2533ieee80211_mesh_update_beacon(struct ieee80211vap *vap,
2534 struct ieee80211_beacon_offsets *bo)
2535{
2536 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap"));
2537
2538 if (isset(bo->bo_flags, IEEE80211_BEACON_MESHCONF)) {
2539 (void)ieee80211_add_meshconf(bo->bo_meshconf, vap);
2540 clrbit(bo->bo_flags, IEEE80211_BEACON_MESHCONF);
2541 }
2542}
2543
2544static int
2545mesh_ioctl_get80211(struct ieee80211vap *vap, struct ieee80211req *ireq)
2546{
2547 struct ieee80211_mesh_state *ms = vap->iv_mesh;
2548 uint8_t tmpmeshid[IEEE80211_NWID_LEN];
2549 struct ieee80211_mesh_route *rt;
2550 struct ieee80211req_mesh_route *imr;
2551 size_t len, off;
2552 uint8_t *p;
2553 int error;
2554
2555 if (vap->iv_opmode != IEEE80211_M_MBSS)
2556 return ENOSYS;
2557
2558 error = 0;
2559 switch (ireq->i_type) {
2560 case IEEE80211_IOC_MESH_ID:
2561 ireq->i_len = ms->ms_idlen;
2562 memcpy(tmpmeshid, ms->ms_id, ireq->i_len);
2563 error = copyout(tmpmeshid, ireq->i_data, ireq->i_len);
2564 break;
2565 case IEEE80211_IOC_MESH_AP:
2566 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_AP) != 0;
2567 break;
2568 case IEEE80211_IOC_MESH_FWRD:
2569 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) != 0;
2570 break;
2571 case IEEE80211_IOC_MESH_TTL:
2572 ireq->i_val = ms->ms_ttl;
2573 break;
2574 case IEEE80211_IOC_MESH_RTCMD:
2575 switch (ireq->i_val) {
2576 case IEEE80211_MESH_RTCMD_LIST:
2577 len = 0;
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2578 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) {
2579 len += sizeof(*imr);
2580 }
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2581 if (len > ireq->i_len || ireq->i_len < sizeof(*imr)) {
2582 ireq->i_len = len;
2583 return ENOMEM;
2584 }
2585 ireq->i_len = len;
2586 /* XXX M_WAIT? */
fcaa651d 2587 p = kmalloc(len, M_TEMP, M_INTWAIT | M_ZERO);
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2588 if (p == NULL)
2589 return ENOMEM;
2590 off = 0;
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2591 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) {
2592 if (off >= len)
2593 break;
2594 imr = (struct ieee80211req_mesh_route *)
2595 (p + off);
2596 imr->imr_flags = rt->rt_flags;
2597 IEEE80211_ADDR_COPY(imr->imr_dest,
2598 rt->rt_dest);
2599 IEEE80211_ADDR_COPY(imr->imr_nexthop,
2600 rt->rt_nexthop);
2601 imr->imr_metric = rt->rt_metric;
2602 imr->imr_nhops = rt->rt_nhops;
2603 imr->imr_lifetime = rt->rt_lifetime;
2604 imr->imr_lastmseq = rt->rt_lastmseq;
2605 off += sizeof(*imr);
2606 }
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2607 error = copyout(p, (uint8_t *)ireq->i_data,
2608 ireq->i_len);
2609 kfree(p, M_TEMP);
2610 break;
2611 case IEEE80211_MESH_RTCMD_FLUSH:
2612 case IEEE80211_MESH_RTCMD_ADD:
2613 case IEEE80211_MESH_RTCMD_DELETE:
2614 return EINVAL;
2615 default:
2616 return ENOSYS;
2617 }
2618 break;
2619 case IEEE80211_IOC_MESH_PR_METRIC:
2620 len = strlen(ms->ms_pmetric->mpm_descr);
2621 if (ireq->i_len < len)
2622 return EINVAL;
2623 ireq->i_len = len;
2624 error = copyout(ms->ms_pmetric->mpm_descr,
2625 (uint8_t *)ireq->i_data, len);
2626 break;
2627 case IEEE80211_IOC_MESH_PR_PATH:
2628 len = strlen(ms->ms_ppath->mpp_descr);
2629 if (ireq->i_len < len)
2630 return EINVAL;
2631 ireq->i_len = len;
2632 error = copyout(ms->ms_ppath->mpp_descr,
2633 (uint8_t *)ireq->i_data, len);
2634 break;
2635 default:
2636 return ENOSYS;
2637 }
2638
2639 return error;
2640}
2641IEEE80211_IOCTL_GET(mesh, mesh_ioctl_get80211);
2642
2643static int
2644mesh_ioctl_set80211(struct ieee80211vap *vap, struct ieee80211req *ireq)
2645{
2646 struct ieee80211_mesh_state *ms = vap->iv_mesh;
2647 uint8_t tmpmeshid[IEEE80211_NWID_LEN];
2648 uint8_t tmpaddr[IEEE80211_ADDR_LEN];
2649 char tmpproto[IEEE80211_MESH_PROTO_DSZ];
2650 int error;
2651
2652 if (vap->iv_opmode != IEEE80211_M_MBSS)
2653 return ENOSYS;
2654
2655 error = 0;
2656 switch (ireq->i_type) {
2657 case IEEE80211_IOC_MESH_ID:
2658 if (ireq->i_val != 0 || ireq->i_len > IEEE80211_MESHID_LEN)
2659 return EINVAL;
2660 error = copyin(ireq->i_data, tmpmeshid, ireq->i_len);
2661 if (error != 0)
2662 break;
2663 memset(ms->ms_id, 0, IEEE80211_NWID_LEN);
2664 ms->ms_idlen = ireq->i_len;
2665 memcpy(ms->ms_id, tmpmeshid, ireq->i_len);
2666 error = ENETRESET;
2667 break;
2668 case IEEE80211_IOC_MESH_AP:
2669 if (ireq->i_val)
2670 ms->ms_flags |= IEEE80211_MESHFLAGS_AP;
2671 else
2672 ms->ms_flags &= ~IEEE80211_MESHFLAGS_AP;
2673 error = ENETRESET;
2674 break;
2675 case IEEE80211_IOC_MESH_FWRD:
2676 if (ireq->i_val)
2677 ms->ms_flags |= IEEE80211_MESHFLAGS_FWD;
2678 else
2679 ms->ms_flags &= ~IEEE80211_MESHFLAGS_FWD;
2680 break;
2681 case IEEE80211_IOC_MESH_TTL:
2682 ms->ms_ttl = (uint8_t) ireq->i_val;
2683 break;
2684 case IEEE80211_IOC_MESH_RTCMD:
2685 switch (ireq->i_val) {
2686 case IEEE80211_MESH_RTCMD_LIST:
2687 return EINVAL;
2688 case IEEE80211_MESH_RTCMD_FLUSH:
2689 ieee80211_mesh_rt_flush(vap);
2690 break;
2691 case IEEE80211_MESH_RTCMD_ADD:
2692 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ireq->i_data) ||
2693 IEEE80211_ADDR_EQ(broadcastaddr, ireq->i_data))
2694 return EINVAL;
2695 error = copyin(ireq->i_data, &tmpaddr,
2696 IEEE80211_ADDR_LEN);
2697 if (error == 0)
2698 ieee80211_mesh_discover(vap, tmpaddr, NULL);
2699 break;
2700 case IEEE80211_MESH_RTCMD_DELETE:
2701 ieee80211_mesh_rt_del(vap, ireq->i_data);
2702 break;
2703 default:
2704 return ENOSYS;
2705 }
2706 break;
2707 case IEEE80211_IOC_MESH_PR_METRIC:
2708 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto));
2709 if (error == 0) {
2710 error = mesh_select_proto_metric(vap, tmpproto);
2711 if (error == 0)
2712 error = ENETRESET;
2713 }
2714 break;
2715 case IEEE80211_IOC_MESH_PR_PATH:
2716 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto));
2717 if (error == 0) {
2718 error = mesh_select_proto_path(vap, tmpproto);
2719 if (error == 0)
2720 error = ENETRESET;
2721 }
2722 break;
2723 default:
2724 return ENOSYS;
2725 }
2726 return error;
2727}
2728IEEE80211_IOCTL_SET(mesh, mesh_ioctl_set80211);