1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright (c) 2008, 2009 open80211s Ltd.
4 * Copyright (C) 2018 - 2020 Intel Corporation
5 * Authors: Luis Carlos Cobo <luisca@cozybit.com>
6 * Javier Cardona <javier@cozybit.com>
7 */
8
9 #include <linux/slab.h>
10 #include <asm/unaligned.h>
11 #include "ieee80211_i.h"
12 #include "mesh.h"
13 #include "driver-ops.h"
14
15 static int mesh_allocated;
16 static struct kmem_cache *rm_cache;
17
mesh_action_is_path_sel(struct ieee80211_mgmt * mgmt)18 bool mesh_action_is_path_sel(struct ieee80211_mgmt *mgmt)
19 {
20 return (mgmt->u.action.u.mesh_action.action_code ==
21 WLAN_MESH_ACTION_HWMP_PATH_SELECTION);
22 }
23
ieee80211s_init(void)24 void ieee80211s_init(void)
25 {
26 mesh_allocated = 1;
27 rm_cache = kmem_cache_create("mesh_rmc", sizeof(struct rmc_entry),
28 0, 0, NULL);
29 }
30
ieee80211s_stop(void)31 void ieee80211s_stop(void)
32 {
33 if (!mesh_allocated)
34 return;
35 kmem_cache_destroy(rm_cache);
36 }
37
ieee80211_mesh_housekeeping_timer(struct timer_list * t)38 static void ieee80211_mesh_housekeeping_timer(struct timer_list *t)
39 {
40 struct ieee80211_sub_if_data *sdata =
41 from_timer(sdata, t, u.mesh.housekeeping_timer);
42 struct ieee80211_local *local = sdata->local;
43 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
44
45 set_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags);
46
47 ieee80211_queue_work(&local->hw, &sdata->work);
48 }
49
50 /**
51 * mesh_matches_local - check if the config of a mesh point matches ours
52 *
53 * @sdata: local mesh subif
54 * @ie: information elements of a management frame from the mesh peer
55 *
56 * This function checks if the mesh configuration of a mesh point matches the
57 * local mesh configuration, i.e. if both nodes belong to the same mesh network.
58 */
mesh_matches_local(struct ieee80211_sub_if_data * sdata,struct ieee802_11_elems * ie)59 bool mesh_matches_local(struct ieee80211_sub_if_data *sdata,
60 struct ieee802_11_elems *ie)
61 {
62 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
63 u32 basic_rates = 0;
64 struct cfg80211_chan_def sta_chan_def;
65 struct ieee80211_supported_band *sband;
66 u32 vht_cap_info = 0;
67
68 /*
69 * As support for each feature is added, check for matching
70 * - On mesh config capabilities
71 * - Power Save Support En
72 * - Sync support enabled
73 * - Sync support active
74 * - Sync support required from peer
75 * - MDA enabled
76 * - Power management control on fc
77 */
78 if (!(ifmsh->mesh_id_len == ie->mesh_id_len &&
79 memcmp(ifmsh->mesh_id, ie->mesh_id, ie->mesh_id_len) == 0 &&
80 (ifmsh->mesh_pp_id == ie->mesh_config->meshconf_psel) &&
81 (ifmsh->mesh_pm_id == ie->mesh_config->meshconf_pmetric) &&
82 (ifmsh->mesh_cc_id == ie->mesh_config->meshconf_congest) &&
83 (ifmsh->mesh_sp_id == ie->mesh_config->meshconf_synch) &&
84 (ifmsh->mesh_auth_id == ie->mesh_config->meshconf_auth)))
85 return false;
86
87 sband = ieee80211_get_sband(sdata);
88 if (!sband)
89 return false;
90
91 ieee80211_sta_get_rates(sdata, ie, sband->band,
92 &basic_rates);
93
94 if (sdata->vif.bss_conf.basic_rates != basic_rates)
95 return false;
96
97 cfg80211_chandef_create(&sta_chan_def, sdata->vif.bss_conf.chandef.chan,
98 NL80211_CHAN_NO_HT);
99 ieee80211_chandef_ht_oper(ie->ht_operation, &sta_chan_def);
100
101 if (ie->vht_cap_elem)
102 vht_cap_info = le32_to_cpu(ie->vht_cap_elem->vht_cap_info);
103
104 ieee80211_chandef_vht_oper(&sdata->local->hw, vht_cap_info,
105 ie->vht_operation, ie->ht_operation,
106 &sta_chan_def);
107 ieee80211_chandef_he_6ghz_oper(sdata, ie->he_operation, &sta_chan_def);
108
109 if (!cfg80211_chandef_compatible(&sdata->vif.bss_conf.chandef,
110 &sta_chan_def))
111 return false;
112
113 return true;
114 }
115
116 /**
117 * mesh_peer_accepts_plinks - check if an mp is willing to establish peer links
118 *
119 * @ie: information elements of a management frame from the mesh peer
120 */
mesh_peer_accepts_plinks(struct ieee802_11_elems * ie)121 bool mesh_peer_accepts_plinks(struct ieee802_11_elems *ie)
122 {
123 return (ie->mesh_config->meshconf_cap &
124 IEEE80211_MESHCONF_CAPAB_ACCEPT_PLINKS) != 0;
125 }
126
127 /**
128 * mesh_accept_plinks_update - update accepting_plink in local mesh beacons
129 *
130 * @sdata: mesh interface in which mesh beacons are going to be updated
131 *
132 * Returns: beacon changed flag if the beacon content changed.
133 */
mesh_accept_plinks_update(struct ieee80211_sub_if_data * sdata)134 u32 mesh_accept_plinks_update(struct ieee80211_sub_if_data *sdata)
135 {
136 bool free_plinks;
137 u32 changed = 0;
138
139 /* In case mesh_plink_free_count > 0 and mesh_plinktbl_capacity == 0,
140 * the mesh interface might be able to establish plinks with peers that
141 * are already on the table but are not on PLINK_ESTAB state. However,
142 * in general the mesh interface is not accepting peer link requests
143 * from new peers, and that must be reflected in the beacon
144 */
145 free_plinks = mesh_plink_availables(sdata);
146
147 if (free_plinks != sdata->u.mesh.accepting_plinks) {
148 sdata->u.mesh.accepting_plinks = free_plinks;
149 changed = BSS_CHANGED_BEACON;
150 }
151
152 return changed;
153 }
154
155 /*
156 * mesh_sta_cleanup - clean up any mesh sta state
157 *
158 * @sta: mesh sta to clean up.
159 */
mesh_sta_cleanup(struct sta_info * sta)160 void mesh_sta_cleanup(struct sta_info *sta)
161 {
162 struct ieee80211_sub_if_data *sdata = sta->sdata;
163 u32 changed = mesh_plink_deactivate(sta);
164
165 if (changed)
166 ieee80211_mbss_info_change_notify(sdata, changed);
167 }
168
mesh_rmc_init(struct ieee80211_sub_if_data * sdata)169 int mesh_rmc_init(struct ieee80211_sub_if_data *sdata)
170 {
171 int i;
172
173 sdata->u.mesh.rmc = kmalloc(sizeof(struct mesh_rmc), GFP_KERNEL);
174 if (!sdata->u.mesh.rmc)
175 return -ENOMEM;
176 sdata->u.mesh.rmc->idx_mask = RMC_BUCKETS - 1;
177 for (i = 0; i < RMC_BUCKETS; i++)
178 INIT_HLIST_HEAD(&sdata->u.mesh.rmc->bucket[i]);
179 return 0;
180 }
181
mesh_rmc_free(struct ieee80211_sub_if_data * sdata)182 void mesh_rmc_free(struct ieee80211_sub_if_data *sdata)
183 {
184 struct mesh_rmc *rmc = sdata->u.mesh.rmc;
185 struct rmc_entry *p;
186 struct hlist_node *n;
187 int i;
188
189 if (!sdata->u.mesh.rmc)
190 return;
191
192 for (i = 0; i < RMC_BUCKETS; i++) {
193 hlist_for_each_entry_safe(p, n, &rmc->bucket[i], list) {
194 hlist_del(&p->list);
195 kmem_cache_free(rm_cache, p);
196 }
197 }
198
199 kfree(rmc);
200 sdata->u.mesh.rmc = NULL;
201 }
202
203 /**
204 * mesh_rmc_check - Check frame in recent multicast cache and add if absent.
205 *
206 * @sdata: interface
207 * @sa: source address
208 * @mesh_hdr: mesh_header
209 *
210 * Returns: 0 if the frame is not in the cache, nonzero otherwise.
211 *
212 * Checks using the source address and the mesh sequence number if we have
213 * received this frame lately. If the frame is not in the cache, it is added to
214 * it.
215 */
mesh_rmc_check(struct ieee80211_sub_if_data * sdata,const u8 * sa,struct ieee80211s_hdr * mesh_hdr)216 int mesh_rmc_check(struct ieee80211_sub_if_data *sdata,
217 const u8 *sa, struct ieee80211s_hdr *mesh_hdr)
218 {
219 struct mesh_rmc *rmc = sdata->u.mesh.rmc;
220 u32 seqnum = 0;
221 int entries = 0;
222 u8 idx;
223 struct rmc_entry *p;
224 struct hlist_node *n;
225
226 if (!rmc)
227 return -1;
228
229 /* Don't care about endianness since only match matters */
230 memcpy(&seqnum, &mesh_hdr->seqnum, sizeof(mesh_hdr->seqnum));
231 idx = le32_to_cpu(mesh_hdr->seqnum) & rmc->idx_mask;
232 hlist_for_each_entry_safe(p, n, &rmc->bucket[idx], list) {
233 ++entries;
234 if (time_after(jiffies, p->exp_time) ||
235 entries == RMC_QUEUE_MAX_LEN) {
236 hlist_del(&p->list);
237 kmem_cache_free(rm_cache, p);
238 --entries;
239 } else if ((seqnum == p->seqnum) && ether_addr_equal(sa, p->sa))
240 return -1;
241 }
242
243 p = kmem_cache_alloc(rm_cache, GFP_ATOMIC);
244 if (!p)
245 return 0;
246
247 p->seqnum = seqnum;
248 p->exp_time = jiffies + RMC_TIMEOUT;
249 memcpy(p->sa, sa, ETH_ALEN);
250 hlist_add_head(&p->list, &rmc->bucket[idx]);
251 return 0;
252 }
253
mesh_add_meshconf_ie(struct ieee80211_sub_if_data * sdata,struct sk_buff * skb)254 int mesh_add_meshconf_ie(struct ieee80211_sub_if_data *sdata,
255 struct sk_buff *skb)
256 {
257 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
258 u8 *pos, neighbors;
259 u8 meshconf_len = sizeof(struct ieee80211_meshconf_ie);
260 bool is_connected_to_gate = ifmsh->num_gates > 0 ||
261 ifmsh->mshcfg.dot11MeshGateAnnouncementProtocol ||
262 ifmsh->mshcfg.dot11MeshConnectedToMeshGate;
263 bool is_connected_to_as = ifmsh->mshcfg.dot11MeshConnectedToAuthServer;
264
265 if (skb_tailroom(skb) < 2 + meshconf_len)
266 return -ENOMEM;
267
268 pos = skb_put(skb, 2 + meshconf_len);
269 *pos++ = WLAN_EID_MESH_CONFIG;
270 *pos++ = meshconf_len;
271
272 /* save a pointer for quick updates in pre-tbtt */
273 ifmsh->meshconf_offset = pos - skb->data;
274
275 /* Active path selection protocol ID */
276 *pos++ = ifmsh->mesh_pp_id;
277 /* Active path selection metric ID */
278 *pos++ = ifmsh->mesh_pm_id;
279 /* Congestion control mode identifier */
280 *pos++ = ifmsh->mesh_cc_id;
281 /* Synchronization protocol identifier */
282 *pos++ = ifmsh->mesh_sp_id;
283 /* Authentication Protocol identifier */
284 *pos++ = ifmsh->mesh_auth_id;
285 /* Mesh Formation Info - number of neighbors */
286 neighbors = atomic_read(&ifmsh->estab_plinks);
287 neighbors = min_t(int, neighbors, IEEE80211_MAX_MESH_PEERINGS);
288 *pos++ = (is_connected_to_as << 7) |
289 (neighbors << 1) |
290 is_connected_to_gate;
291 /* Mesh capability */
292 *pos = 0x00;
293 *pos |= ifmsh->mshcfg.dot11MeshForwarding ?
294 IEEE80211_MESHCONF_CAPAB_FORWARDING : 0x00;
295 *pos |= ifmsh->accepting_plinks ?
296 IEEE80211_MESHCONF_CAPAB_ACCEPT_PLINKS : 0x00;
297 /* Mesh PS mode. See IEEE802.11-2012 8.4.2.100.8 */
298 *pos |= ifmsh->ps_peers_deep_sleep ?
299 IEEE80211_MESHCONF_CAPAB_POWER_SAVE_LEVEL : 0x00;
300 return 0;
301 }
302
mesh_add_meshid_ie(struct ieee80211_sub_if_data * sdata,struct sk_buff * skb)303 int mesh_add_meshid_ie(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb)
304 {
305 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
306 u8 *pos;
307
308 if (skb_tailroom(skb) < 2 + ifmsh->mesh_id_len)
309 return -ENOMEM;
310
311 pos = skb_put(skb, 2 + ifmsh->mesh_id_len);
312 *pos++ = WLAN_EID_MESH_ID;
313 *pos++ = ifmsh->mesh_id_len;
314 if (ifmsh->mesh_id_len)
315 memcpy(pos, ifmsh->mesh_id, ifmsh->mesh_id_len);
316
317 return 0;
318 }
319
mesh_add_awake_window_ie(struct ieee80211_sub_if_data * sdata,struct sk_buff * skb)320 static int mesh_add_awake_window_ie(struct ieee80211_sub_if_data *sdata,
321 struct sk_buff *skb)
322 {
323 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
324 u8 *pos;
325
326 /* see IEEE802.11-2012 13.14.6 */
327 if (ifmsh->ps_peers_light_sleep == 0 &&
328 ifmsh->ps_peers_deep_sleep == 0 &&
329 ifmsh->nonpeer_pm == NL80211_MESH_POWER_ACTIVE)
330 return 0;
331
332 if (skb_tailroom(skb) < 4)
333 return -ENOMEM;
334
335 pos = skb_put(skb, 2 + 2);
336 *pos++ = WLAN_EID_MESH_AWAKE_WINDOW;
337 *pos++ = 2;
338 put_unaligned_le16(ifmsh->mshcfg.dot11MeshAwakeWindowDuration, pos);
339
340 return 0;
341 }
342
mesh_add_vendor_ies(struct ieee80211_sub_if_data * sdata,struct sk_buff * skb)343 int mesh_add_vendor_ies(struct ieee80211_sub_if_data *sdata,
344 struct sk_buff *skb)
345 {
346 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
347 u8 offset, len;
348 const u8 *data;
349
350 if (!ifmsh->ie || !ifmsh->ie_len)
351 return 0;
352
353 /* fast-forward to vendor IEs */
354 offset = ieee80211_ie_split_vendor(ifmsh->ie, ifmsh->ie_len, 0);
355
356 if (offset < ifmsh->ie_len) {
357 len = ifmsh->ie_len - offset;
358 data = ifmsh->ie + offset;
359 if (skb_tailroom(skb) < len)
360 return -ENOMEM;
361 skb_put_data(skb, data, len);
362 }
363
364 return 0;
365 }
366
mesh_add_rsn_ie(struct ieee80211_sub_if_data * sdata,struct sk_buff * skb)367 int mesh_add_rsn_ie(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb)
368 {
369 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
370 u8 len = 0;
371 const u8 *data;
372
373 if (!ifmsh->ie || !ifmsh->ie_len)
374 return 0;
375
376 /* find RSN IE */
377 data = cfg80211_find_ie(WLAN_EID_RSN, ifmsh->ie, ifmsh->ie_len);
378 if (!data)
379 return 0;
380
381 len = data[1] + 2;
382
383 if (skb_tailroom(skb) < len)
384 return -ENOMEM;
385 skb_put_data(skb, data, len);
386
387 return 0;
388 }
389
mesh_add_ds_params_ie(struct ieee80211_sub_if_data * sdata,struct sk_buff * skb)390 static int mesh_add_ds_params_ie(struct ieee80211_sub_if_data *sdata,
391 struct sk_buff *skb)
392 {
393 struct ieee80211_chanctx_conf *chanctx_conf;
394 struct ieee80211_channel *chan;
395 u8 *pos;
396
397 if (skb_tailroom(skb) < 3)
398 return -ENOMEM;
399
400 rcu_read_lock();
401 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
402 if (WARN_ON(!chanctx_conf)) {
403 rcu_read_unlock();
404 return -EINVAL;
405 }
406 chan = chanctx_conf->def.chan;
407 rcu_read_unlock();
408
409 pos = skb_put(skb, 2 + 1);
410 *pos++ = WLAN_EID_DS_PARAMS;
411 *pos++ = 1;
412 *pos++ = ieee80211_frequency_to_channel(chan->center_freq);
413
414 return 0;
415 }
416
mesh_add_ht_cap_ie(struct ieee80211_sub_if_data * sdata,struct sk_buff * skb)417 int mesh_add_ht_cap_ie(struct ieee80211_sub_if_data *sdata,
418 struct sk_buff *skb)
419 {
420 struct ieee80211_supported_band *sband;
421 u8 *pos;
422
423 sband = ieee80211_get_sband(sdata);
424 if (!sband)
425 return -EINVAL;
426
427 /* HT not allowed in 6 GHz */
428 if (sband->band == NL80211_BAND_6GHZ)
429 return 0;
430
431 if (!sband->ht_cap.ht_supported ||
432 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT ||
433 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 ||
434 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10)
435 return 0;
436
437 if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_ht_cap))
438 return -ENOMEM;
439
440 pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_cap));
441 ieee80211_ie_build_ht_cap(pos, &sband->ht_cap, sband->ht_cap.cap);
442
443 return 0;
444 }
445
mesh_add_ht_oper_ie(struct ieee80211_sub_if_data * sdata,struct sk_buff * skb)446 int mesh_add_ht_oper_ie(struct ieee80211_sub_if_data *sdata,
447 struct sk_buff *skb)
448 {
449 struct ieee80211_local *local = sdata->local;
450 struct ieee80211_chanctx_conf *chanctx_conf;
451 struct ieee80211_channel *channel;
452 struct ieee80211_supported_band *sband;
453 struct ieee80211_sta_ht_cap *ht_cap;
454 u8 *pos;
455
456 rcu_read_lock();
457 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
458 if (WARN_ON(!chanctx_conf)) {
459 rcu_read_unlock();
460 return -EINVAL;
461 }
462 channel = chanctx_conf->def.chan;
463 rcu_read_unlock();
464
465 sband = local->hw.wiphy->bands[channel->band];
466 ht_cap = &sband->ht_cap;
467
468 /* HT not allowed in 6 GHz */
469 if (sband->band == NL80211_BAND_6GHZ)
470 return 0;
471
472 if (!ht_cap->ht_supported ||
473 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT ||
474 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 ||
475 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10)
476 return 0;
477
478 if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_ht_operation))
479 return -ENOMEM;
480
481 pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_operation));
482 ieee80211_ie_build_ht_oper(pos, ht_cap, &sdata->vif.bss_conf.chandef,
483 sdata->vif.bss_conf.ht_operation_mode,
484 false);
485
486 return 0;
487 }
488
mesh_add_vht_cap_ie(struct ieee80211_sub_if_data * sdata,struct sk_buff * skb)489 int mesh_add_vht_cap_ie(struct ieee80211_sub_if_data *sdata,
490 struct sk_buff *skb)
491 {
492 struct ieee80211_supported_band *sband;
493 u8 *pos;
494
495 sband = ieee80211_get_sband(sdata);
496 if (!sband)
497 return -EINVAL;
498
499 /* VHT not allowed in 6 GHz */
500 if (sband->band == NL80211_BAND_6GHZ)
501 return 0;
502
503 if (!sband->vht_cap.vht_supported ||
504 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT ||
505 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 ||
506 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10)
507 return 0;
508
509 if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_vht_cap))
510 return -ENOMEM;
511
512 pos = skb_put(skb, 2 + sizeof(struct ieee80211_vht_cap));
513 ieee80211_ie_build_vht_cap(pos, &sband->vht_cap, sband->vht_cap.cap);
514
515 return 0;
516 }
517
mesh_add_vht_oper_ie(struct ieee80211_sub_if_data * sdata,struct sk_buff * skb)518 int mesh_add_vht_oper_ie(struct ieee80211_sub_if_data *sdata,
519 struct sk_buff *skb)
520 {
521 struct ieee80211_local *local = sdata->local;
522 struct ieee80211_chanctx_conf *chanctx_conf;
523 struct ieee80211_channel *channel;
524 struct ieee80211_supported_band *sband;
525 struct ieee80211_sta_vht_cap *vht_cap;
526 u8 *pos;
527
528 rcu_read_lock();
529 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
530 if (WARN_ON(!chanctx_conf)) {
531 rcu_read_unlock();
532 return -EINVAL;
533 }
534 channel = chanctx_conf->def.chan;
535 rcu_read_unlock();
536
537 sband = local->hw.wiphy->bands[channel->band];
538 vht_cap = &sband->vht_cap;
539
540 /* VHT not allowed in 6 GHz */
541 if (sband->band == NL80211_BAND_6GHZ)
542 return 0;
543
544 if (!vht_cap->vht_supported ||
545 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT ||
546 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 ||
547 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10)
548 return 0;
549
550 if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_vht_operation))
551 return -ENOMEM;
552
553 pos = skb_put(skb, 2 + sizeof(struct ieee80211_vht_operation));
554 ieee80211_ie_build_vht_oper(pos, vht_cap,
555 &sdata->vif.bss_conf.chandef);
556
557 return 0;
558 }
559
mesh_add_he_cap_ie(struct ieee80211_sub_if_data * sdata,struct sk_buff * skb,u8 ie_len)560 int mesh_add_he_cap_ie(struct ieee80211_sub_if_data *sdata,
561 struct sk_buff *skb, u8 ie_len)
562 {
563 const struct ieee80211_sta_he_cap *he_cap;
564 struct ieee80211_supported_band *sband;
565 u8 *pos;
566
567 sband = ieee80211_get_sband(sdata);
568 if (!sband)
569 return -EINVAL;
570
571 he_cap = ieee80211_get_he_iftype_cap(sband, NL80211_IFTYPE_MESH_POINT);
572
573 if (!he_cap ||
574 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT ||
575 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 ||
576 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10)
577 return 0;
578
579 if (skb_tailroom(skb) < ie_len)
580 return -ENOMEM;
581
582 pos = skb_put(skb, ie_len);
583 ieee80211_ie_build_he_cap(pos, he_cap, pos + ie_len);
584
585 return 0;
586 }
587
mesh_add_he_oper_ie(struct ieee80211_sub_if_data * sdata,struct sk_buff * skb)588 int mesh_add_he_oper_ie(struct ieee80211_sub_if_data *sdata,
589 struct sk_buff *skb)
590 {
591 const struct ieee80211_sta_he_cap *he_cap;
592 struct ieee80211_supported_band *sband;
593 u32 len;
594 u8 *pos;
595
596 sband = ieee80211_get_sband(sdata);
597 if (!sband)
598 return -EINVAL;
599
600 he_cap = ieee80211_get_he_iftype_cap(sband, NL80211_IFTYPE_MESH_POINT);
601 if (!he_cap ||
602 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT ||
603 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 ||
604 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10)
605 return 0;
606
607 len = 2 + 1 + sizeof(struct ieee80211_he_operation);
608 if (sdata->vif.bss_conf.chandef.chan->band == NL80211_BAND_6GHZ)
609 len += sizeof(struct ieee80211_he_6ghz_oper);
610
611 if (skb_tailroom(skb) < len)
612 return -ENOMEM;
613
614 pos = skb_put(skb, len);
615 ieee80211_ie_build_he_oper(pos, &sdata->vif.bss_conf.chandef);
616
617 return 0;
618 }
619
mesh_add_he_6ghz_cap_ie(struct ieee80211_sub_if_data * sdata,struct sk_buff * skb)620 int mesh_add_he_6ghz_cap_ie(struct ieee80211_sub_if_data *sdata,
621 struct sk_buff *skb)
622 {
623 struct ieee80211_supported_band *sband;
624 const struct ieee80211_sband_iftype_data *iftd;
625
626 sband = ieee80211_get_sband(sdata);
627 if (!sband)
628 return -EINVAL;
629
630 iftd = ieee80211_get_sband_iftype_data(sband,
631 NL80211_IFTYPE_MESH_POINT);
632 /* The device doesn't support HE in mesh mode or at all */
633 if (!iftd)
634 return 0;
635
636 ieee80211_ie_build_he_6ghz_cap(sdata, skb);
637 return 0;
638 }
639
ieee80211_mesh_path_timer(struct timer_list * t)640 static void ieee80211_mesh_path_timer(struct timer_list *t)
641 {
642 struct ieee80211_sub_if_data *sdata =
643 from_timer(sdata, t, u.mesh.mesh_path_timer);
644
645 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
646 }
647
ieee80211_mesh_path_root_timer(struct timer_list * t)648 static void ieee80211_mesh_path_root_timer(struct timer_list *t)
649 {
650 struct ieee80211_sub_if_data *sdata =
651 from_timer(sdata, t, u.mesh.mesh_path_root_timer);
652 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
653
654 set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags);
655
656 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
657 }
658
ieee80211_mesh_root_setup(struct ieee80211_if_mesh * ifmsh)659 void ieee80211_mesh_root_setup(struct ieee80211_if_mesh *ifmsh)
660 {
661 if (ifmsh->mshcfg.dot11MeshHWMPRootMode > IEEE80211_ROOTMODE_ROOT)
662 set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags);
663 else {
664 clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags);
665 /* stop running timer */
666 del_timer_sync(&ifmsh->mesh_path_root_timer);
667 }
668 }
669
670 static void
ieee80211_mesh_update_bss_params(struct ieee80211_sub_if_data * sdata,u8 * ie,u8 ie_len)671 ieee80211_mesh_update_bss_params(struct ieee80211_sub_if_data *sdata,
672 u8 *ie, u8 ie_len)
673 {
674 struct ieee80211_supported_band *sband;
675 const struct element *cap;
676 const struct ieee80211_he_operation *he_oper = NULL;
677
678 sband = ieee80211_get_sband(sdata);
679 if (!sband)
680 return;
681
682 if (!ieee80211_get_he_iftype_cap(sband, NL80211_IFTYPE_MESH_POINT) ||
683 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT ||
684 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 ||
685 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10)
686 return;
687
688 sdata->vif.bss_conf.he_support = true;
689
690 cap = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_OPERATION, ie, ie_len);
691 if (cap && cap->datalen >= 1 + sizeof(*he_oper) &&
692 cap->datalen >= 1 + ieee80211_he_oper_size(cap->data + 1))
693 he_oper = (void *)(cap->data + 1);
694
695 if (he_oper)
696 sdata->vif.bss_conf.he_oper.params =
697 __le32_to_cpu(he_oper->he_oper_params);
698 }
699
700 /**
701 * ieee80211_fill_mesh_addresses - fill addresses of a locally originated mesh frame
702 * @hdr: 802.11 frame header
703 * @fc: frame control field
704 * @meshda: destination address in the mesh
705 * @meshsa: source address in the mesh. Same as TA, as frame is
706 * locally originated.
707 *
708 * Return the length of the 802.11 (does not include a mesh control header)
709 */
ieee80211_fill_mesh_addresses(struct ieee80211_hdr * hdr,__le16 * fc,const u8 * meshda,const u8 * meshsa)710 int ieee80211_fill_mesh_addresses(struct ieee80211_hdr *hdr, __le16 *fc,
711 const u8 *meshda, const u8 *meshsa)
712 {
713 if (is_multicast_ether_addr(meshda)) {
714 *fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS);
715 /* DA TA SA */
716 memcpy(hdr->addr1, meshda, ETH_ALEN);
717 memcpy(hdr->addr2, meshsa, ETH_ALEN);
718 memcpy(hdr->addr3, meshsa, ETH_ALEN);
719 return 24;
720 } else {
721 *fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
722 /* RA TA DA SA */
723 eth_zero_addr(hdr->addr1); /* RA is resolved later */
724 memcpy(hdr->addr2, meshsa, ETH_ALEN);
725 memcpy(hdr->addr3, meshda, ETH_ALEN);
726 memcpy(hdr->addr4, meshsa, ETH_ALEN);
727 return 30;
728 }
729 }
730
731 /**
732 * ieee80211_new_mesh_header - create a new mesh header
733 * @sdata: mesh interface to be used
734 * @meshhdr: uninitialized mesh header
735 * @addr4or5: 1st address in the ae header, which may correspond to address 4
736 * (if addr6 is NULL) or address 5 (if addr6 is present). It may
737 * be NULL.
738 * @addr6: 2nd address in the ae header, which corresponds to addr6 of the
739 * mesh frame
740 *
741 * Return the header length.
742 */
ieee80211_new_mesh_header(struct ieee80211_sub_if_data * sdata,struct ieee80211s_hdr * meshhdr,const char * addr4or5,const char * addr6)743 unsigned int ieee80211_new_mesh_header(struct ieee80211_sub_if_data *sdata,
744 struct ieee80211s_hdr *meshhdr,
745 const char *addr4or5, const char *addr6)
746 {
747 if (WARN_ON(!addr4or5 && addr6))
748 return 0;
749
750 memset(meshhdr, 0, sizeof(*meshhdr));
751
752 meshhdr->ttl = sdata->u.mesh.mshcfg.dot11MeshTTL;
753
754 /* FIXME: racy -- TX on multiple queues can be concurrent */
755 put_unaligned(cpu_to_le32(sdata->u.mesh.mesh_seqnum), &meshhdr->seqnum);
756 sdata->u.mesh.mesh_seqnum++;
757
758 if (addr4or5 && !addr6) {
759 meshhdr->flags |= MESH_FLAGS_AE_A4;
760 memcpy(meshhdr->eaddr1, addr4or5, ETH_ALEN);
761 return 2 * ETH_ALEN;
762 } else if (addr4or5 && addr6) {
763 meshhdr->flags |= MESH_FLAGS_AE_A5_A6;
764 memcpy(meshhdr->eaddr1, addr4or5, ETH_ALEN);
765 memcpy(meshhdr->eaddr2, addr6, ETH_ALEN);
766 return 3 * ETH_ALEN;
767 }
768
769 return ETH_ALEN;
770 }
771
ieee80211_mesh_housekeeping(struct ieee80211_sub_if_data * sdata)772 static void ieee80211_mesh_housekeeping(struct ieee80211_sub_if_data *sdata)
773 {
774 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
775 u32 changed;
776
777 if (ifmsh->mshcfg.plink_timeout > 0)
778 ieee80211_sta_expire(sdata, ifmsh->mshcfg.plink_timeout * HZ);
779 mesh_path_expire(sdata);
780
781 changed = mesh_accept_plinks_update(sdata);
782 ieee80211_mbss_info_change_notify(sdata, changed);
783
784 mod_timer(&ifmsh->housekeeping_timer,
785 round_jiffies(jiffies +
786 IEEE80211_MESH_HOUSEKEEPING_INTERVAL));
787 }
788
ieee80211_mesh_rootpath(struct ieee80211_sub_if_data * sdata)789 static void ieee80211_mesh_rootpath(struct ieee80211_sub_if_data *sdata)
790 {
791 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
792 u32 interval;
793
794 mesh_path_tx_root_frame(sdata);
795
796 if (ifmsh->mshcfg.dot11MeshHWMPRootMode == IEEE80211_PROACTIVE_RANN)
797 interval = ifmsh->mshcfg.dot11MeshHWMPRannInterval;
798 else
799 interval = ifmsh->mshcfg.dot11MeshHWMProotInterval;
800
801 mod_timer(&ifmsh->mesh_path_root_timer,
802 round_jiffies(TU_TO_EXP_TIME(interval)));
803 }
804
805 static int
ieee80211_mesh_build_beacon(struct ieee80211_if_mesh * ifmsh)806 ieee80211_mesh_build_beacon(struct ieee80211_if_mesh *ifmsh)
807 {
808 struct beacon_data *bcn;
809 int head_len, tail_len;
810 struct sk_buff *skb;
811 struct ieee80211_mgmt *mgmt;
812 struct ieee80211_chanctx_conf *chanctx_conf;
813 struct mesh_csa_settings *csa;
814 enum nl80211_band band;
815 u8 ie_len_he_cap;
816 u8 *pos;
817 struct ieee80211_sub_if_data *sdata;
818 int hdr_len = offsetofend(struct ieee80211_mgmt, u.beacon);
819
820 sdata = container_of(ifmsh, struct ieee80211_sub_if_data, u.mesh);
821 rcu_read_lock();
822 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
823 band = chanctx_conf->def.chan->band;
824 rcu_read_unlock();
825
826 ie_len_he_cap = ieee80211_ie_len_he_cap(sdata,
827 NL80211_IFTYPE_MESH_POINT);
828 head_len = hdr_len +
829 2 + /* NULL SSID */
830 /* Channel Switch Announcement */
831 2 + sizeof(struct ieee80211_channel_sw_ie) +
832 /* Mesh Channel Switch Parameters */
833 2 + sizeof(struct ieee80211_mesh_chansw_params_ie) +
834 /* Channel Switch Wrapper + Wide Bandwidth CSA IE */
835 2 + 2 + sizeof(struct ieee80211_wide_bw_chansw_ie) +
836 2 + sizeof(struct ieee80211_sec_chan_offs_ie) +
837 2 + 8 + /* supported rates */
838 2 + 3; /* DS params */
839 tail_len = 2 + (IEEE80211_MAX_SUPP_RATES - 8) +
840 2 + sizeof(struct ieee80211_ht_cap) +
841 2 + sizeof(struct ieee80211_ht_operation) +
842 2 + ifmsh->mesh_id_len +
843 2 + sizeof(struct ieee80211_meshconf_ie) +
844 2 + sizeof(__le16) + /* awake window */
845 2 + sizeof(struct ieee80211_vht_cap) +
846 2 + sizeof(struct ieee80211_vht_operation) +
847 ie_len_he_cap +
848 2 + 1 + sizeof(struct ieee80211_he_operation) +
849 sizeof(struct ieee80211_he_6ghz_oper) +
850 2 + 1 + sizeof(struct ieee80211_he_6ghz_capa) +
851 ifmsh->ie_len;
852
853 bcn = kzalloc(sizeof(*bcn) + head_len + tail_len, GFP_KERNEL);
854 /* need an skb for IE builders to operate on */
855 skb = dev_alloc_skb(max(head_len, tail_len));
856
857 if (!bcn || !skb)
858 goto out_free;
859
860 /*
861 * pointers go into the block we allocated,
862 * memory is | beacon_data | head | tail |
863 */
864 bcn->head = ((u8 *) bcn) + sizeof(*bcn);
865
866 /* fill in the head */
867 mgmt = skb_put_zero(skb, hdr_len);
868 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
869 IEEE80211_STYPE_BEACON);
870 eth_broadcast_addr(mgmt->da);
871 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
872 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
873 ieee80211_mps_set_frame_flags(sdata, NULL, (void *) mgmt);
874 mgmt->u.beacon.beacon_int =
875 cpu_to_le16(sdata->vif.bss_conf.beacon_int);
876 mgmt->u.beacon.capab_info |= cpu_to_le16(
877 sdata->u.mesh.security ? WLAN_CAPABILITY_PRIVACY : 0);
878
879 pos = skb_put(skb, 2);
880 *pos++ = WLAN_EID_SSID;
881 *pos++ = 0x0;
882
883 rcu_read_lock();
884 csa = rcu_dereference(ifmsh->csa);
885 if (csa) {
886 enum nl80211_channel_type ct;
887 struct cfg80211_chan_def *chandef;
888 int ie_len = 2 + sizeof(struct ieee80211_channel_sw_ie) +
889 2 + sizeof(struct ieee80211_mesh_chansw_params_ie);
890
891 pos = skb_put_zero(skb, ie_len);
892 *pos++ = WLAN_EID_CHANNEL_SWITCH;
893 *pos++ = 3;
894 *pos++ = 0x0;
895 *pos++ = ieee80211_frequency_to_channel(
896 csa->settings.chandef.chan->center_freq);
897 bcn->cntdwn_current_counter = csa->settings.count;
898 bcn->cntdwn_counter_offsets[0] = hdr_len + 6;
899 *pos++ = csa->settings.count;
900 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM;
901 *pos++ = 6;
902 if (ifmsh->csa_role == IEEE80211_MESH_CSA_ROLE_INIT) {
903 *pos++ = ifmsh->mshcfg.dot11MeshTTL;
904 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
905 } else {
906 *pos++ = ifmsh->chsw_ttl;
907 }
908 *pos++ |= csa->settings.block_tx ?
909 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
910 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos);
911 pos += 2;
912 put_unaligned_le16(ifmsh->pre_value, pos);
913 pos += 2;
914
915 switch (csa->settings.chandef.width) {
916 case NL80211_CHAN_WIDTH_40:
917 ie_len = 2 + sizeof(struct ieee80211_sec_chan_offs_ie);
918 pos = skb_put_zero(skb, ie_len);
919
920 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */
921 *pos++ = 1; /* len */
922 ct = cfg80211_get_chandef_type(&csa->settings.chandef);
923 if (ct == NL80211_CHAN_HT40PLUS)
924 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
925 else
926 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
927 break;
928 case NL80211_CHAN_WIDTH_80:
929 case NL80211_CHAN_WIDTH_80P80:
930 case NL80211_CHAN_WIDTH_160:
931 /* Channel Switch Wrapper + Wide Bandwidth CSA IE */
932 ie_len = 2 + 2 +
933 sizeof(struct ieee80211_wide_bw_chansw_ie);
934 pos = skb_put_zero(skb, ie_len);
935
936 *pos++ = WLAN_EID_CHANNEL_SWITCH_WRAPPER; /* EID */
937 *pos++ = 5; /* len */
938 /* put sub IE */
939 chandef = &csa->settings.chandef;
940 ieee80211_ie_build_wide_bw_cs(pos, chandef);
941 break;
942 default:
943 break;
944 }
945 }
946 rcu_read_unlock();
947
948 if (ieee80211_add_srates_ie(sdata, skb, true, band) ||
949 mesh_add_ds_params_ie(sdata, skb))
950 goto out_free;
951
952 bcn->head_len = skb->len;
953 memcpy(bcn->head, skb->data, bcn->head_len);
954
955 /* now the tail */
956 skb_trim(skb, 0);
957 bcn->tail = bcn->head + bcn->head_len;
958
959 if (ieee80211_add_ext_srates_ie(sdata, skb, true, band) ||
960 mesh_add_rsn_ie(sdata, skb) ||
961 mesh_add_ht_cap_ie(sdata, skb) ||
962 mesh_add_ht_oper_ie(sdata, skb) ||
963 mesh_add_meshid_ie(sdata, skb) ||
964 mesh_add_meshconf_ie(sdata, skb) ||
965 mesh_add_awake_window_ie(sdata, skb) ||
966 mesh_add_vht_cap_ie(sdata, skb) ||
967 mesh_add_vht_oper_ie(sdata, skb) ||
968 mesh_add_he_cap_ie(sdata, skb, ie_len_he_cap) ||
969 mesh_add_he_oper_ie(sdata, skb) ||
970 mesh_add_he_6ghz_cap_ie(sdata, skb) ||
971 mesh_add_vendor_ies(sdata, skb))
972 goto out_free;
973
974 bcn->tail_len = skb->len;
975 memcpy(bcn->tail, skb->data, bcn->tail_len);
976 ieee80211_mesh_update_bss_params(sdata, bcn->tail, bcn->tail_len);
977 bcn->meshconf = (struct ieee80211_meshconf_ie *)
978 (bcn->tail + ifmsh->meshconf_offset);
979
980 dev_kfree_skb(skb);
981 rcu_assign_pointer(ifmsh->beacon, bcn);
982 return 0;
983 out_free:
984 kfree(bcn);
985 dev_kfree_skb(skb);
986 return -ENOMEM;
987 }
988
989 static int
ieee80211_mesh_rebuild_beacon(struct ieee80211_sub_if_data * sdata)990 ieee80211_mesh_rebuild_beacon(struct ieee80211_sub_if_data *sdata)
991 {
992 struct beacon_data *old_bcn;
993 int ret;
994
995 old_bcn = rcu_dereference_protected(sdata->u.mesh.beacon,
996 lockdep_is_held(&sdata->wdev.mtx));
997 ret = ieee80211_mesh_build_beacon(&sdata->u.mesh);
998 if (ret)
999 /* just reuse old beacon */
1000 return ret;
1001
1002 if (old_bcn)
1003 kfree_rcu(old_bcn, rcu_head);
1004 return 0;
1005 }
1006
ieee80211_mbss_info_change_notify(struct ieee80211_sub_if_data * sdata,u32 changed)1007 void ieee80211_mbss_info_change_notify(struct ieee80211_sub_if_data *sdata,
1008 u32 changed)
1009 {
1010 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1011 unsigned long bits = changed;
1012 u32 bit;
1013
1014 if (!bits)
1015 return;
1016
1017 /* if we race with running work, worst case this work becomes a noop */
1018 for_each_set_bit(bit, &bits, sizeof(changed) * BITS_PER_BYTE)
1019 set_bit(bit, &ifmsh->mbss_changed);
1020 set_bit(MESH_WORK_MBSS_CHANGED, &ifmsh->wrkq_flags);
1021 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1022 }
1023
ieee80211_start_mesh(struct ieee80211_sub_if_data * sdata)1024 int ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata)
1025 {
1026 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1027 struct ieee80211_local *local = sdata->local;
1028 u32 changed = BSS_CHANGED_BEACON |
1029 BSS_CHANGED_BEACON_ENABLED |
1030 BSS_CHANGED_HT |
1031 BSS_CHANGED_BASIC_RATES |
1032 BSS_CHANGED_BEACON_INT |
1033 BSS_CHANGED_MCAST_RATE;
1034
1035 local->fif_other_bss++;
1036 /* mesh ifaces must set allmulti to forward mcast traffic */
1037 atomic_inc(&local->iff_allmultis);
1038 ieee80211_configure_filter(local);
1039
1040 ifmsh->mesh_cc_id = 0; /* Disabled */
1041 /* register sync ops from extensible synchronization framework */
1042 ifmsh->sync_ops = ieee80211_mesh_sync_ops_get(ifmsh->mesh_sp_id);
1043 ifmsh->sync_offset_clockdrift_max = 0;
1044 set_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags);
1045 ieee80211_mesh_root_setup(ifmsh);
1046 ieee80211_queue_work(&local->hw, &sdata->work);
1047 sdata->vif.bss_conf.ht_operation_mode =
1048 ifmsh->mshcfg.ht_opmode;
1049 sdata->vif.bss_conf.enable_beacon = true;
1050
1051 changed |= ieee80211_mps_local_status_update(sdata);
1052
1053 if (ieee80211_mesh_build_beacon(ifmsh)) {
1054 ieee80211_stop_mesh(sdata);
1055 return -ENOMEM;
1056 }
1057
1058 ieee80211_recalc_dtim(local, sdata);
1059 ieee80211_bss_info_change_notify(sdata, changed);
1060
1061 netif_carrier_on(sdata->dev);
1062 return 0;
1063 }
1064
ieee80211_stop_mesh(struct ieee80211_sub_if_data * sdata)1065 void ieee80211_stop_mesh(struct ieee80211_sub_if_data *sdata)
1066 {
1067 struct ieee80211_local *local = sdata->local;
1068 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1069 struct beacon_data *bcn;
1070
1071 netif_carrier_off(sdata->dev);
1072
1073 /* flush STAs and mpaths on this iface */
1074 sta_info_flush(sdata);
1075 ieee80211_free_keys(sdata, true);
1076 mesh_path_flush_by_iface(sdata);
1077
1078 /* stop the beacon */
1079 ifmsh->mesh_id_len = 0;
1080 sdata->vif.bss_conf.enable_beacon = false;
1081 sdata->beacon_rate_set = false;
1082 clear_bit(SDATA_STATE_OFFCHANNEL_BEACON_STOPPED, &sdata->state);
1083 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON_ENABLED);
1084
1085 /* remove beacon */
1086 bcn = rcu_dereference_protected(ifmsh->beacon,
1087 lockdep_is_held(&sdata->wdev.mtx));
1088 RCU_INIT_POINTER(ifmsh->beacon, NULL);
1089 kfree_rcu(bcn, rcu_head);
1090
1091 /* free all potentially still buffered group-addressed frames */
1092 local->total_ps_buffered -= skb_queue_len(&ifmsh->ps.bc_buf);
1093 skb_queue_purge(&ifmsh->ps.bc_buf);
1094
1095 del_timer_sync(&sdata->u.mesh.housekeeping_timer);
1096 del_timer_sync(&sdata->u.mesh.mesh_path_root_timer);
1097 del_timer_sync(&sdata->u.mesh.mesh_path_timer);
1098
1099 /* clear any mesh work (for next join) we may have accrued */
1100 ifmsh->wrkq_flags = 0;
1101 ifmsh->mbss_changed = 0;
1102
1103 local->fif_other_bss--;
1104 atomic_dec(&local->iff_allmultis);
1105 ieee80211_configure_filter(local);
1106 }
1107
ieee80211_mesh_csa_mark_radar(struct ieee80211_sub_if_data * sdata)1108 static void ieee80211_mesh_csa_mark_radar(struct ieee80211_sub_if_data *sdata)
1109 {
1110 int err;
1111
1112 /* if the current channel is a DFS channel, mark the channel as
1113 * unavailable.
1114 */
1115 err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy,
1116 &sdata->vif.bss_conf.chandef,
1117 NL80211_IFTYPE_MESH_POINT);
1118 if (err > 0)
1119 cfg80211_radar_event(sdata->local->hw.wiphy,
1120 &sdata->vif.bss_conf.chandef, GFP_ATOMIC);
1121 }
1122
1123 static bool
ieee80211_mesh_process_chnswitch(struct ieee80211_sub_if_data * sdata,struct ieee802_11_elems * elems,bool beacon)1124 ieee80211_mesh_process_chnswitch(struct ieee80211_sub_if_data *sdata,
1125 struct ieee802_11_elems *elems, bool beacon)
1126 {
1127 struct cfg80211_csa_settings params;
1128 struct ieee80211_csa_ie csa_ie;
1129 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1130 struct ieee80211_supported_band *sband;
1131 int err;
1132 u32 sta_flags, vht_cap_info = 0;
1133
1134 sdata_assert_lock(sdata);
1135
1136 sband = ieee80211_get_sband(sdata);
1137 if (!sband)
1138 return false;
1139
1140 sta_flags = 0;
1141 switch (sdata->vif.bss_conf.chandef.width) {
1142 case NL80211_CHAN_WIDTH_20_NOHT:
1143 sta_flags |= IEEE80211_STA_DISABLE_HT;
1144 fallthrough;
1145 case NL80211_CHAN_WIDTH_20:
1146 sta_flags |= IEEE80211_STA_DISABLE_40MHZ;
1147 fallthrough;
1148 case NL80211_CHAN_WIDTH_40:
1149 sta_flags |= IEEE80211_STA_DISABLE_VHT;
1150 break;
1151 default:
1152 break;
1153 }
1154
1155 if (elems->vht_cap_elem)
1156 vht_cap_info =
1157 le32_to_cpu(elems->vht_cap_elem->vht_cap_info);
1158
1159 memset(¶ms, 0, sizeof(params));
1160 err = ieee80211_parse_ch_switch_ie(sdata, elems, sband->band,
1161 vht_cap_info,
1162 sta_flags, sdata->vif.addr,
1163 &csa_ie);
1164 if (err < 0)
1165 return false;
1166 if (err)
1167 return false;
1168
1169 /* Mark the channel unavailable if the reason for the switch is
1170 * regulatory.
1171 */
1172 if (csa_ie.reason_code == WLAN_REASON_MESH_CHAN_REGULATORY)
1173 ieee80211_mesh_csa_mark_radar(sdata);
1174
1175 params.chandef = csa_ie.chandef;
1176 params.count = csa_ie.count;
1177
1178 if (!cfg80211_chandef_usable(sdata->local->hw.wiphy, ¶ms.chandef,
1179 IEEE80211_CHAN_DISABLED) ||
1180 !cfg80211_reg_can_beacon(sdata->local->hw.wiphy, ¶ms.chandef,
1181 NL80211_IFTYPE_MESH_POINT)) {
1182 sdata_info(sdata,
1183 "mesh STA %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), aborting\n",
1184 sdata->vif.addr,
1185 params.chandef.chan->center_freq,
1186 params.chandef.width,
1187 params.chandef.center_freq1,
1188 params.chandef.center_freq2);
1189 return false;
1190 }
1191
1192 err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy,
1193 ¶ms.chandef,
1194 NL80211_IFTYPE_MESH_POINT);
1195 if (err < 0)
1196 return false;
1197 if (err > 0 && !ifmsh->userspace_handles_dfs) {
1198 sdata_info(sdata,
1199 "mesh STA %pM switches to channel requiring DFS (%d MHz, width:%d, CF1/2: %d/%d MHz), aborting\n",
1200 sdata->vif.addr,
1201 params.chandef.chan->center_freq,
1202 params.chandef.width,
1203 params.chandef.center_freq1,
1204 params.chandef.center_freq2);
1205 return false;
1206 }
1207
1208 params.radar_required = err;
1209
1210 if (cfg80211_chandef_identical(¶ms.chandef,
1211 &sdata->vif.bss_conf.chandef)) {
1212 mcsa_dbg(sdata,
1213 "received csa with an identical chandef, ignoring\n");
1214 return true;
1215 }
1216
1217 mcsa_dbg(sdata,
1218 "received channel switch announcement to go to channel %d MHz\n",
1219 params.chandef.chan->center_freq);
1220
1221 params.block_tx = csa_ie.mode & WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT;
1222 if (beacon) {
1223 ifmsh->chsw_ttl = csa_ie.ttl - 1;
1224 if (ifmsh->pre_value >= csa_ie.pre_value)
1225 return false;
1226 ifmsh->pre_value = csa_ie.pre_value;
1227 }
1228
1229 if (ifmsh->chsw_ttl >= ifmsh->mshcfg.dot11MeshTTL)
1230 return false;
1231
1232 ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_REPEATER;
1233
1234 if (ieee80211_channel_switch(sdata->local->hw.wiphy, sdata->dev,
1235 ¶ms) < 0)
1236 return false;
1237
1238 return true;
1239 }
1240
1241 static void
ieee80211_mesh_rx_probe_req(struct ieee80211_sub_if_data * sdata,struct ieee80211_mgmt * mgmt,size_t len)1242 ieee80211_mesh_rx_probe_req(struct ieee80211_sub_if_data *sdata,
1243 struct ieee80211_mgmt *mgmt, size_t len)
1244 {
1245 struct ieee80211_local *local = sdata->local;
1246 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1247 struct sk_buff *presp;
1248 struct beacon_data *bcn;
1249 struct ieee80211_mgmt *hdr;
1250 struct ieee802_11_elems elems;
1251 size_t baselen;
1252 u8 *pos;
1253
1254 pos = mgmt->u.probe_req.variable;
1255 baselen = (u8 *) pos - (u8 *) mgmt;
1256 if (baselen > len)
1257 return;
1258
1259 ieee802_11_parse_elems(pos, len - baselen, false, &elems, mgmt->bssid,
1260 NULL);
1261
1262 if (!elems.mesh_id)
1263 return;
1264
1265 /* 802.11-2012 10.1.4.3.2 */
1266 if ((!ether_addr_equal(mgmt->da, sdata->vif.addr) &&
1267 !is_broadcast_ether_addr(mgmt->da)) ||
1268 elems.ssid_len != 0)
1269 return;
1270
1271 if (elems.mesh_id_len != 0 &&
1272 (elems.mesh_id_len != ifmsh->mesh_id_len ||
1273 memcmp(elems.mesh_id, ifmsh->mesh_id, ifmsh->mesh_id_len)))
1274 return;
1275
1276 rcu_read_lock();
1277 bcn = rcu_dereference(ifmsh->beacon);
1278
1279 if (!bcn)
1280 goto out;
1281
1282 presp = dev_alloc_skb(local->tx_headroom +
1283 bcn->head_len + bcn->tail_len);
1284 if (!presp)
1285 goto out;
1286
1287 skb_reserve(presp, local->tx_headroom);
1288 skb_put_data(presp, bcn->head, bcn->head_len);
1289 skb_put_data(presp, bcn->tail, bcn->tail_len);
1290 hdr = (struct ieee80211_mgmt *) presp->data;
1291 hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1292 IEEE80211_STYPE_PROBE_RESP);
1293 memcpy(hdr->da, mgmt->sa, ETH_ALEN);
1294 IEEE80211_SKB_CB(presp)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1295 ieee80211_tx_skb(sdata, presp);
1296 out:
1297 rcu_read_unlock();
1298 }
1299
ieee80211_mesh_rx_bcn_presp(struct ieee80211_sub_if_data * sdata,u16 stype,struct ieee80211_mgmt * mgmt,size_t len,struct ieee80211_rx_status * rx_status)1300 static void ieee80211_mesh_rx_bcn_presp(struct ieee80211_sub_if_data *sdata,
1301 u16 stype,
1302 struct ieee80211_mgmt *mgmt,
1303 size_t len,
1304 struct ieee80211_rx_status *rx_status)
1305 {
1306 struct ieee80211_local *local = sdata->local;
1307 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1308 struct ieee802_11_elems elems;
1309 struct ieee80211_channel *channel;
1310 size_t baselen;
1311 int freq;
1312 enum nl80211_band band = rx_status->band;
1313
1314 /* ignore ProbeResp to foreign address */
1315 if (stype == IEEE80211_STYPE_PROBE_RESP &&
1316 !ether_addr_equal(mgmt->da, sdata->vif.addr))
1317 return;
1318
1319 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1320 if (baselen > len)
1321 return;
1322
1323 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1324 false, &elems, mgmt->bssid, NULL);
1325
1326 /* ignore non-mesh or secure / unsecure mismatch */
1327 if ((!elems.mesh_id || !elems.mesh_config) ||
1328 (elems.rsn && sdata->u.mesh.security == IEEE80211_MESH_SEC_NONE) ||
1329 (!elems.rsn && sdata->u.mesh.security != IEEE80211_MESH_SEC_NONE))
1330 return;
1331
1332 if (elems.ds_params)
1333 freq = ieee80211_channel_to_frequency(elems.ds_params[0], band);
1334 else
1335 freq = rx_status->freq;
1336
1337 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1338
1339 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1340 return;
1341
1342 if (mesh_matches_local(sdata, &elems)) {
1343 mpl_dbg(sdata, "rssi_threshold=%d,rx_status->signal=%d\n",
1344 sdata->u.mesh.mshcfg.rssi_threshold, rx_status->signal);
1345 if (!sdata->u.mesh.user_mpm ||
1346 sdata->u.mesh.mshcfg.rssi_threshold == 0 ||
1347 sdata->u.mesh.mshcfg.rssi_threshold < rx_status->signal)
1348 mesh_neighbour_update(sdata, mgmt->sa, &elems,
1349 rx_status);
1350
1351 if (ifmsh->csa_role != IEEE80211_MESH_CSA_ROLE_INIT &&
1352 !sdata->vif.csa_active)
1353 ieee80211_mesh_process_chnswitch(sdata, &elems, true);
1354 }
1355
1356 if (ifmsh->sync_ops)
1357 ifmsh->sync_ops->rx_bcn_presp(sdata,
1358 stype, mgmt, &elems, rx_status);
1359 }
1360
ieee80211_mesh_finish_csa(struct ieee80211_sub_if_data * sdata)1361 int ieee80211_mesh_finish_csa(struct ieee80211_sub_if_data *sdata)
1362 {
1363 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1364 struct mesh_csa_settings *tmp_csa_settings;
1365 int ret = 0;
1366 int changed = 0;
1367
1368 /* Reset the TTL value and Initiator flag */
1369 ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_NONE;
1370 ifmsh->chsw_ttl = 0;
1371
1372 /* Remove the CSA and MCSP elements from the beacon */
1373 tmp_csa_settings = rcu_dereference_protected(ifmsh->csa,
1374 lockdep_is_held(&sdata->wdev.mtx));
1375 RCU_INIT_POINTER(ifmsh->csa, NULL);
1376 if (tmp_csa_settings)
1377 kfree_rcu(tmp_csa_settings, rcu_head);
1378 ret = ieee80211_mesh_rebuild_beacon(sdata);
1379 if (ret)
1380 return -EINVAL;
1381
1382 changed |= BSS_CHANGED_BEACON;
1383
1384 mcsa_dbg(sdata, "complete switching to center freq %d MHz",
1385 sdata->vif.bss_conf.chandef.chan->center_freq);
1386 return changed;
1387 }
1388
ieee80211_mesh_csa_beacon(struct ieee80211_sub_if_data * sdata,struct cfg80211_csa_settings * csa_settings)1389 int ieee80211_mesh_csa_beacon(struct ieee80211_sub_if_data *sdata,
1390 struct cfg80211_csa_settings *csa_settings)
1391 {
1392 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1393 struct mesh_csa_settings *tmp_csa_settings;
1394 int ret = 0;
1395
1396 lockdep_assert_held(&sdata->wdev.mtx);
1397
1398 tmp_csa_settings = kmalloc(sizeof(*tmp_csa_settings),
1399 GFP_ATOMIC);
1400 if (!tmp_csa_settings)
1401 return -ENOMEM;
1402
1403 memcpy(&tmp_csa_settings->settings, csa_settings,
1404 sizeof(struct cfg80211_csa_settings));
1405
1406 rcu_assign_pointer(ifmsh->csa, tmp_csa_settings);
1407
1408 ret = ieee80211_mesh_rebuild_beacon(sdata);
1409 if (ret) {
1410 tmp_csa_settings = rcu_dereference(ifmsh->csa);
1411 RCU_INIT_POINTER(ifmsh->csa, NULL);
1412 kfree_rcu(tmp_csa_settings, rcu_head);
1413 return ret;
1414 }
1415
1416 return BSS_CHANGED_BEACON;
1417 }
1418
mesh_fwd_csa_frame(struct ieee80211_sub_if_data * sdata,struct ieee80211_mgmt * mgmt,size_t len,struct ieee802_11_elems * elems)1419 static int mesh_fwd_csa_frame(struct ieee80211_sub_if_data *sdata,
1420 struct ieee80211_mgmt *mgmt, size_t len,
1421 struct ieee802_11_elems *elems)
1422 {
1423 struct ieee80211_mgmt *mgmt_fwd;
1424 struct sk_buff *skb;
1425 struct ieee80211_local *local = sdata->local;
1426
1427 skb = dev_alloc_skb(local->tx_headroom + len);
1428 if (!skb)
1429 return -ENOMEM;
1430 skb_reserve(skb, local->tx_headroom);
1431 mgmt_fwd = skb_put(skb, len);
1432
1433 elems->mesh_chansw_params_ie->mesh_ttl--;
1434 elems->mesh_chansw_params_ie->mesh_flags &=
1435 ~WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
1436
1437 memcpy(mgmt_fwd, mgmt, len);
1438 eth_broadcast_addr(mgmt_fwd->da);
1439 memcpy(mgmt_fwd->sa, sdata->vif.addr, ETH_ALEN);
1440 memcpy(mgmt_fwd->bssid, sdata->vif.addr, ETH_ALEN);
1441
1442 ieee80211_tx_skb(sdata, skb);
1443 return 0;
1444 }
1445
mesh_rx_csa_frame(struct ieee80211_sub_if_data * sdata,struct ieee80211_mgmt * mgmt,size_t len)1446 static void mesh_rx_csa_frame(struct ieee80211_sub_if_data *sdata,
1447 struct ieee80211_mgmt *mgmt, size_t len)
1448 {
1449 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1450 struct ieee802_11_elems elems;
1451 u16 pre_value;
1452 bool fwd_csa = true;
1453 size_t baselen;
1454 u8 *pos;
1455
1456 if (mgmt->u.action.u.measurement.action_code !=
1457 WLAN_ACTION_SPCT_CHL_SWITCH)
1458 return;
1459
1460 pos = mgmt->u.action.u.chan_switch.variable;
1461 baselen = offsetof(struct ieee80211_mgmt,
1462 u.action.u.chan_switch.variable);
1463 ieee802_11_parse_elems(pos, len - baselen, true, &elems,
1464 mgmt->bssid, NULL);
1465
1466 if (!mesh_matches_local(sdata, &elems))
1467 return;
1468
1469 ifmsh->chsw_ttl = elems.mesh_chansw_params_ie->mesh_ttl;
1470 if (!--ifmsh->chsw_ttl)
1471 fwd_csa = false;
1472
1473 pre_value = le16_to_cpu(elems.mesh_chansw_params_ie->mesh_pre_value);
1474 if (ifmsh->pre_value >= pre_value)
1475 return;
1476
1477 ifmsh->pre_value = pre_value;
1478
1479 if (!sdata->vif.csa_active &&
1480 !ieee80211_mesh_process_chnswitch(sdata, &elems, false)) {
1481 mcsa_dbg(sdata, "Failed to process CSA action frame");
1482 return;
1483 }
1484
1485 /* forward or re-broadcast the CSA frame */
1486 if (fwd_csa) {
1487 if (mesh_fwd_csa_frame(sdata, mgmt, len, &elems) < 0)
1488 mcsa_dbg(sdata, "Failed to forward the CSA frame");
1489 }
1490 }
1491
ieee80211_mesh_rx_mgmt_action(struct ieee80211_sub_if_data * sdata,struct ieee80211_mgmt * mgmt,size_t len,struct ieee80211_rx_status * rx_status)1492 static void ieee80211_mesh_rx_mgmt_action(struct ieee80211_sub_if_data *sdata,
1493 struct ieee80211_mgmt *mgmt,
1494 size_t len,
1495 struct ieee80211_rx_status *rx_status)
1496 {
1497 switch (mgmt->u.action.category) {
1498 case WLAN_CATEGORY_SELF_PROTECTED:
1499 switch (mgmt->u.action.u.self_prot.action_code) {
1500 case WLAN_SP_MESH_PEERING_OPEN:
1501 case WLAN_SP_MESH_PEERING_CLOSE:
1502 case WLAN_SP_MESH_PEERING_CONFIRM:
1503 mesh_rx_plink_frame(sdata, mgmt, len, rx_status);
1504 break;
1505 }
1506 break;
1507 case WLAN_CATEGORY_MESH_ACTION:
1508 if (mesh_action_is_path_sel(mgmt))
1509 mesh_rx_path_sel_frame(sdata, mgmt, len);
1510 break;
1511 case WLAN_CATEGORY_SPECTRUM_MGMT:
1512 mesh_rx_csa_frame(sdata, mgmt, len);
1513 break;
1514 }
1515 }
1516
ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data * sdata,struct sk_buff * skb)1517 void ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1518 struct sk_buff *skb)
1519 {
1520 struct ieee80211_rx_status *rx_status;
1521 struct ieee80211_mgmt *mgmt;
1522 u16 stype;
1523
1524 sdata_lock(sdata);
1525
1526 /* mesh already went down */
1527 if (!sdata->u.mesh.mesh_id_len)
1528 goto out;
1529
1530 rx_status = IEEE80211_SKB_RXCB(skb);
1531 mgmt = (struct ieee80211_mgmt *) skb->data;
1532 stype = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE;
1533
1534 switch (stype) {
1535 case IEEE80211_STYPE_PROBE_RESP:
1536 case IEEE80211_STYPE_BEACON:
1537 ieee80211_mesh_rx_bcn_presp(sdata, stype, mgmt, skb->len,
1538 rx_status);
1539 break;
1540 case IEEE80211_STYPE_PROBE_REQ:
1541 ieee80211_mesh_rx_probe_req(sdata, mgmt, skb->len);
1542 break;
1543 case IEEE80211_STYPE_ACTION:
1544 ieee80211_mesh_rx_mgmt_action(sdata, mgmt, skb->len, rx_status);
1545 break;
1546 }
1547 out:
1548 sdata_unlock(sdata);
1549 }
1550
mesh_bss_info_changed(struct ieee80211_sub_if_data * sdata)1551 static void mesh_bss_info_changed(struct ieee80211_sub_if_data *sdata)
1552 {
1553 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1554 u32 bit, changed = 0;
1555
1556 for_each_set_bit(bit, &ifmsh->mbss_changed,
1557 sizeof(changed) * BITS_PER_BYTE) {
1558 clear_bit(bit, &ifmsh->mbss_changed);
1559 changed |= BIT(bit);
1560 }
1561
1562 if (sdata->vif.bss_conf.enable_beacon &&
1563 (changed & (BSS_CHANGED_BEACON |
1564 BSS_CHANGED_HT |
1565 BSS_CHANGED_BASIC_RATES |
1566 BSS_CHANGED_BEACON_INT)))
1567 if (ieee80211_mesh_rebuild_beacon(sdata))
1568 return;
1569
1570 ieee80211_bss_info_change_notify(sdata, changed);
1571 }
1572
ieee80211_mesh_work(struct ieee80211_sub_if_data * sdata)1573 void ieee80211_mesh_work(struct ieee80211_sub_if_data *sdata)
1574 {
1575 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1576
1577 sdata_lock(sdata);
1578
1579 /* mesh already went down */
1580 if (!sdata->u.mesh.mesh_id_len)
1581 goto out;
1582
1583 if (ifmsh->preq_queue_len &&
1584 time_after(jiffies,
1585 ifmsh->last_preq + msecs_to_jiffies(ifmsh->mshcfg.dot11MeshHWMPpreqMinInterval)))
1586 mesh_path_start_discovery(sdata);
1587
1588 if (test_and_clear_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags))
1589 ieee80211_mesh_housekeeping(sdata);
1590
1591 if (test_and_clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags))
1592 ieee80211_mesh_rootpath(sdata);
1593
1594 if (test_and_clear_bit(MESH_WORK_DRIFT_ADJUST, &ifmsh->wrkq_flags))
1595 mesh_sync_adjust_tsf(sdata);
1596
1597 if (test_and_clear_bit(MESH_WORK_MBSS_CHANGED, &ifmsh->wrkq_flags))
1598 mesh_bss_info_changed(sdata);
1599 out:
1600 sdata_unlock(sdata);
1601 }
1602
1603
ieee80211_mesh_init_sdata(struct ieee80211_sub_if_data * sdata)1604 void ieee80211_mesh_init_sdata(struct ieee80211_sub_if_data *sdata)
1605 {
1606 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1607 static u8 zero_addr[ETH_ALEN] = {};
1608
1609 timer_setup(&ifmsh->housekeeping_timer,
1610 ieee80211_mesh_housekeeping_timer, 0);
1611
1612 ifmsh->accepting_plinks = true;
1613 atomic_set(&ifmsh->mpaths, 0);
1614 mesh_rmc_init(sdata);
1615 ifmsh->last_preq = jiffies;
1616 ifmsh->next_perr = jiffies;
1617 ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_NONE;
1618 /* Allocate all mesh structures when creating the first mesh interface. */
1619 if (!mesh_allocated)
1620 ieee80211s_init();
1621
1622 mesh_pathtbl_init(sdata);
1623
1624 timer_setup(&ifmsh->mesh_path_timer, ieee80211_mesh_path_timer, 0);
1625 timer_setup(&ifmsh->mesh_path_root_timer,
1626 ieee80211_mesh_path_root_timer, 0);
1627 INIT_LIST_HEAD(&ifmsh->preq_queue.list);
1628 skb_queue_head_init(&ifmsh->ps.bc_buf);
1629 spin_lock_init(&ifmsh->mesh_preq_queue_lock);
1630 spin_lock_init(&ifmsh->sync_offset_lock);
1631 RCU_INIT_POINTER(ifmsh->beacon, NULL);
1632
1633 sdata->vif.bss_conf.bssid = zero_addr;
1634 }
1635
ieee80211_mesh_teardown_sdata(struct ieee80211_sub_if_data * sdata)1636 void ieee80211_mesh_teardown_sdata(struct ieee80211_sub_if_data *sdata)
1637 {
1638 mesh_rmc_free(sdata);
1639 mesh_pathtbl_unregister(sdata);
1640 }
1641
