1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright (c) 2008, 2009 open80211s Ltd.
4 * Copyright (C) 2018 - 2024 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 "wme.h"
14 #include "driver-ops.h"
15
16 static int mesh_allocated;
17 static struct kmem_cache *rm_cache;
18
19 bool mesh_action_is_path_sel(struct ieee80211_mgmt *mgmt)
20 {
21 return (mgmt->u.action.u.mesh_action.action_code ==
22 WLAN_MESH_ACTION_HWMP_PATH_SELECTION);
23 }
24
25 void ieee80211s_init(void)
26 {
27 mesh_allocated = 1;
28 rm_cache = kmem_cache_create("mesh_rmc", sizeof(struct rmc_entry),
29 0, 0, NULL);
30 }
31
32 void ieee80211s_stop(void)
33 {
34 if (!mesh_allocated)
35 return;
36 kmem_cache_destroy(rm_cache);
37 }
38
39 static void ieee80211_mesh_housekeeping_timer(struct timer_list *t)
40 {
41 struct ieee80211_sub_if_data *sdata =
42 from_timer(sdata, t, u.mesh.housekeeping_timer);
43 struct ieee80211_local *local = sdata->local;
44 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
45
46 set_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags);
47
48 wiphy_work_queue(local->hw.wiphy, &sdata->work);
49 }
50
51 /**
52 * mesh_matches_local - check if the config of a mesh point matches ours
53 *
54 * @sdata: local mesh subif
55 * @ie: information elements of a management frame from the mesh peer
56 *
57 * This function checks if the mesh configuration of a mesh point matches the
58 * local mesh configuration, i.e. if both nodes belong to the same mesh network.
59 *
60 * Returns: %true if both nodes belong to the same mesh
61 */
62 bool mesh_matches_local(struct ieee80211_sub_if_data *sdata,
63 struct ieee802_11_elems *ie)
64 {
65 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
66 u32 basic_rates = 0;
67 struct cfg80211_chan_def sta_chan_def;
68 struct ieee80211_supported_band *sband;
69 u32 vht_cap_info = 0;
70
71 /*
72 * As support for each feature is added, check for matching
73 * - On mesh config capabilities
74 * - Power Save Support En
75 * - Sync support enabled
76 * - Sync support active
77 * - Sync support required from peer
78 * - MDA enabled
79 * - Power management control on fc
80 */
81 if (!(ifmsh->mesh_id_len == ie->mesh_id_len &&
82 memcmp(ifmsh->mesh_id, ie->mesh_id, ie->mesh_id_len) == 0 &&
83 (ifmsh->mesh_pp_id == ie->mesh_config->meshconf_psel) &&
84 (ifmsh->mesh_pm_id == ie->mesh_config->meshconf_pmetric) &&
85 (ifmsh->mesh_cc_id == ie->mesh_config->meshconf_congest) &&
86 (ifmsh->mesh_sp_id == ie->mesh_config->meshconf_synch) &&
87 (ifmsh->mesh_auth_id == ie->mesh_config->meshconf_auth)))
88 return false;
89
90 sband = ieee80211_get_sband(sdata);
91 if (!sband)
92 return false;
93
94 ieee80211_sta_get_rates(sdata, ie, sband->band,
95 &basic_rates);
96
97 if (sdata->vif.bss_conf.basic_rates != basic_rates)
98 return false;
99
100 cfg80211_chandef_create(&sta_chan_def, sdata->vif.bss_conf.chanreq.oper.chan,
101 NL80211_CHAN_NO_HT);
102 ieee80211_chandef_ht_oper(ie->ht_operation, &sta_chan_def);
103
104 if (ie->vht_cap_elem)
105 vht_cap_info = le32_to_cpu(ie->vht_cap_elem->vht_cap_info);
106
107 ieee80211_chandef_vht_oper(&sdata->local->hw, vht_cap_info,
108 ie->vht_operation, ie->ht_operation,
109 &sta_chan_def);
110 ieee80211_chandef_he_6ghz_oper(sdata->local, ie->he_operation,
111 ie->eht_operation,
112 &sta_chan_def);
113
114 if (!cfg80211_chandef_compatible(&sdata->vif.bss_conf.chanreq.oper,
115 &sta_chan_def))
116 return false;
117
118 return true;
119 }
120
121 /**
122 * mesh_peer_accepts_plinks - check if an mp is willing to establish peer links
123 *
124 * @ie: information elements of a management frame from the mesh peer
125 *
126 * Returns: %true if the mesh peer is willing to establish peer links
127 */
128 bool mesh_peer_accepts_plinks(struct ieee802_11_elems *ie)
129 {
130 return (ie->mesh_config->meshconf_cap &
131 IEEE80211_MESHCONF_CAPAB_ACCEPT_PLINKS) != 0;
132 }
133
134 /**
135 * mesh_accept_plinks_update - update accepting_plink in local mesh beacons
136 *
137 * @sdata: mesh interface in which mesh beacons are going to be updated
138 *
139 * Returns: beacon changed flag if the beacon content changed.
140 */
141 u64 mesh_accept_plinks_update(struct ieee80211_sub_if_data *sdata)
142 {
143 bool free_plinks;
144 u64 changed = 0;
145
146 /* In case mesh_plink_free_count > 0 and mesh_plinktbl_capacity == 0,
147 * the mesh interface might be able to establish plinks with peers that
148 * are already on the table but are not on PLINK_ESTAB state. However,
149 * in general the mesh interface is not accepting peer link requests
150 * from new peers, and that must be reflected in the beacon
151 */
152 free_plinks = mesh_plink_availables(sdata);
153
154 if (free_plinks != sdata->u.mesh.accepting_plinks) {
155 sdata->u.mesh.accepting_plinks = free_plinks;
156 changed = BSS_CHANGED_BEACON;
157 }
158
159 return changed;
160 }
161
162 /*
163 * mesh_sta_cleanup - clean up any mesh sta state
164 *
165 * @sta: mesh sta to clean up.
166 */
167 void mesh_sta_cleanup(struct sta_info *sta)
168 {
169 struct ieee80211_sub_if_data *sdata = sta->sdata;
170 u64 changed = mesh_plink_deactivate(sta);
171
172 if (changed)
173 ieee80211_mbss_info_change_notify(sdata, changed);
174 }
175
176 int mesh_rmc_init(struct ieee80211_sub_if_data *sdata)
177 {
178 int i;
179
180 sdata->u.mesh.rmc = kmalloc(sizeof(struct mesh_rmc), GFP_KERNEL);
181 if (!sdata->u.mesh.rmc)
182 return -ENOMEM;
183 sdata->u.mesh.rmc->idx_mask = RMC_BUCKETS - 1;
184 for (i = 0; i < RMC_BUCKETS; i++)
185 INIT_HLIST_HEAD(&sdata->u.mesh.rmc->bucket[i]);
186 return 0;
187 }
188
189 void mesh_rmc_free(struct ieee80211_sub_if_data *sdata)
190 {
191 struct mesh_rmc *rmc = sdata->u.mesh.rmc;
192 struct rmc_entry *p;
193 struct hlist_node *n;
194 int i;
195
196 if (!sdata->u.mesh.rmc)
197 return;
198
199 for (i = 0; i < RMC_BUCKETS; i++) {
200 hlist_for_each_entry_safe(p, n, &rmc->bucket[i], list) {
201 hlist_del(&p->list);
202 kmem_cache_free(rm_cache, p);
203 }
204 }
205
206 kfree(rmc);
207 sdata->u.mesh.rmc = NULL;
208 }
209
210 /**
211 * mesh_rmc_check - Check frame in recent multicast cache and add if absent.
212 *
213 * @sdata: interface
214 * @sa: source address
215 * @mesh_hdr: mesh_header
216 *
217 * Returns: 0 if the frame is not in the cache, nonzero otherwise.
218 *
219 * Checks using the source address and the mesh sequence number if we have
220 * received this frame lately. If the frame is not in the cache, it is added to
221 * it.
222 */
223 int mesh_rmc_check(struct ieee80211_sub_if_data *sdata,
224 const u8 *sa, struct ieee80211s_hdr *mesh_hdr)
225 {
226 struct mesh_rmc *rmc = sdata->u.mesh.rmc;
227 u32 seqnum = 0;
228 int entries = 0;
229 u8 idx;
230 struct rmc_entry *p;
231 struct hlist_node *n;
232
233 if (!rmc)
234 return -1;
235
236 /* Don't care about endianness since only match matters */
237 memcpy(&seqnum, &mesh_hdr->seqnum, sizeof(mesh_hdr->seqnum));
238 idx = le32_to_cpu(mesh_hdr->seqnum) & rmc->idx_mask;
239 hlist_for_each_entry_safe(p, n, &rmc->bucket[idx], list) {
240 ++entries;
241 if (time_after(jiffies, p->exp_time) ||
242 entries == RMC_QUEUE_MAX_LEN) {
243 hlist_del(&p->list);
244 kmem_cache_free(rm_cache, p);
245 --entries;
246 } else if ((seqnum == p->seqnum) && ether_addr_equal(sa, p->sa))
247 return -1;
248 }
249
250 p = kmem_cache_alloc(rm_cache, GFP_ATOMIC);
251 if (!p)
252 return 0;
253
254 p->seqnum = seqnum;
255 p->exp_time = jiffies + RMC_TIMEOUT;
256 memcpy(p->sa, sa, ETH_ALEN);
257 hlist_add_head(&p->list, &rmc->bucket[idx]);
258 return 0;
259 }
260
261 int mesh_add_meshconf_ie(struct ieee80211_sub_if_data *sdata,
262 struct sk_buff *skb)
263 {
264 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
265 u8 *pos, neighbors;
266 u8 meshconf_len = sizeof(struct ieee80211_meshconf_ie);
267 bool is_connected_to_gate = ifmsh->num_gates > 0 ||
268 ifmsh->mshcfg.dot11MeshGateAnnouncementProtocol ||
269 ifmsh->mshcfg.dot11MeshConnectedToMeshGate;
270 bool is_connected_to_as = ifmsh->mshcfg.dot11MeshConnectedToAuthServer;
271
272 if (skb_tailroom(skb) < 2 + meshconf_len)
273 return -ENOMEM;
274
275 pos = skb_put(skb, 2 + meshconf_len);
276 *pos++ = WLAN_EID_MESH_CONFIG;
277 *pos++ = meshconf_len;
278
279 /* save a pointer for quick updates in pre-tbtt */
280 ifmsh->meshconf_offset = pos - skb->data;
281
282 /* Active path selection protocol ID */
283 *pos++ = ifmsh->mesh_pp_id;
284 /* Active path selection metric ID */
285 *pos++ = ifmsh->mesh_pm_id;
286 /* Congestion control mode identifier */
287 *pos++ = ifmsh->mesh_cc_id;
288 /* Synchronization protocol identifier */
289 *pos++ = ifmsh->mesh_sp_id;
290 /* Authentication Protocol identifier */
291 *pos++ = ifmsh->mesh_auth_id;
292 /* Mesh Formation Info - number of neighbors */
293 neighbors = atomic_read(&ifmsh->estab_plinks);
294 neighbors = min_t(int, neighbors, IEEE80211_MAX_MESH_PEERINGS);
295 *pos++ = (is_connected_to_as << 7) |
296 (neighbors << 1) |
297 is_connected_to_gate;
298 /* Mesh capability */
299 *pos = 0x00;
300 *pos |= ifmsh->mshcfg.dot11MeshForwarding ?
301 IEEE80211_MESHCONF_CAPAB_FORWARDING : 0x00;
302 *pos |= ifmsh->accepting_plinks ?
303 IEEE80211_MESHCONF_CAPAB_ACCEPT_PLINKS : 0x00;
304 /* Mesh PS mode. See IEEE802.11-2012 8.4.2.100.8 */
305 *pos |= ifmsh->ps_peers_deep_sleep ?
306 IEEE80211_MESHCONF_CAPAB_POWER_SAVE_LEVEL : 0x00;
307 return 0;
308 }
309
310 int mesh_add_meshid_ie(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb)
311 {
312 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
313 u8 *pos;
314
315 if (skb_tailroom(skb) < 2 + ifmsh->mesh_id_len)
316 return -ENOMEM;
317
318 pos = skb_put(skb, 2 + ifmsh->mesh_id_len);
319 *pos++ = WLAN_EID_MESH_ID;
320 *pos++ = ifmsh->mesh_id_len;
321 if (ifmsh->mesh_id_len)
322 memcpy(pos, ifmsh->mesh_id, ifmsh->mesh_id_len);
323
324 return 0;
325 }
326
327 static int mesh_add_awake_window_ie(struct ieee80211_sub_if_data *sdata,
328 struct sk_buff *skb)
329 {
330 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
331 u8 *pos;
332
333 /* see IEEE802.11-2012 13.14.6 */
334 if (ifmsh->ps_peers_light_sleep == 0 &&
335 ifmsh->ps_peers_deep_sleep == 0 &&
336 ifmsh->nonpeer_pm == NL80211_MESH_POWER_ACTIVE)
337 return 0;
338
339 if (skb_tailroom(skb) < 4)
340 return -ENOMEM;
341
342 pos = skb_put(skb, 2 + 2);
343 *pos++ = WLAN_EID_MESH_AWAKE_WINDOW;
344 *pos++ = 2;
345 put_unaligned_le16(ifmsh->mshcfg.dot11MeshAwakeWindowDuration, pos);
346
347 return 0;
348 }
349
350 int mesh_add_vendor_ies(struct ieee80211_sub_if_data *sdata,
351 struct sk_buff *skb)
352 {
353 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
354 u8 offset, len;
355 const u8 *data;
356
357 if (!ifmsh->ie || !ifmsh->ie_len)
358 return 0;
359
360 /* fast-forward to vendor IEs */
361 offset = ieee80211_ie_split_vendor(ifmsh->ie, ifmsh->ie_len, 0);
362
363 if (offset < ifmsh->ie_len) {
364 len = ifmsh->ie_len - offset;
365 data = ifmsh->ie + offset;
366 if (skb_tailroom(skb) < len)
367 return -ENOMEM;
368 skb_put_data(skb, data, len);
369 }
370
371 return 0;
372 }
373
374 int mesh_add_rsn_ie(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb)
375 {
376 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
377 u8 len = 0;
378 const u8 *data;
379
380 if (!ifmsh->ie || !ifmsh->ie_len)
381 return 0;
382
383 /* find RSN IE */
384 data = cfg80211_find_ie(WLAN_EID_RSN, ifmsh->ie, ifmsh->ie_len);
385 if (!data)
386 return 0;
387
388 len = data[1] + 2;
389
390 if (skb_tailroom(skb) < len)
391 return -ENOMEM;
392 skb_put_data(skb, data, len);
393
394 return 0;
395 }
396
397 static int mesh_add_ds_params_ie(struct ieee80211_sub_if_data *sdata,
398 struct sk_buff *skb)
399 {
400 struct ieee80211_chanctx_conf *chanctx_conf;
401 struct ieee80211_channel *chan;
402 u8 *pos;
403
404 if (skb_tailroom(skb) < 3)
405 return -ENOMEM;
406
407 rcu_read_lock();
408 chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf);
409 if (WARN_ON(!chanctx_conf)) {
410 rcu_read_unlock();
411 return -EINVAL;
412 }
413 chan = chanctx_conf->def.chan;
414 rcu_read_unlock();
415
416 pos = skb_put(skb, 2 + 1);
417 *pos++ = WLAN_EID_DS_PARAMS;
418 *pos++ = 1;
419 *pos++ = ieee80211_frequency_to_channel(chan->center_freq);
420
421 return 0;
422 }
423
424 int mesh_add_ht_cap_ie(struct ieee80211_sub_if_data *sdata,
425 struct sk_buff *skb)
426 {
427 struct ieee80211_supported_band *sband;
428 u8 *pos;
429
430 sband = ieee80211_get_sband(sdata);
431 if (!sband)
432 return -EINVAL;
433
434 /* HT not allowed in 6 GHz */
435 if (sband->band == NL80211_BAND_6GHZ)
436 return 0;
437
438 if (!sband->ht_cap.ht_supported ||
439 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_20_NOHT ||
440 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_5 ||
441 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_10)
442 return 0;
443
444 if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_ht_cap))
445 return -ENOMEM;
446
447 pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_cap));
448 ieee80211_ie_build_ht_cap(pos, &sband->ht_cap, sband->ht_cap.cap);
449
450 return 0;
451 }
452
453 int mesh_add_ht_oper_ie(struct ieee80211_sub_if_data *sdata,
454 struct sk_buff *skb)
455 {
456 struct ieee80211_local *local = sdata->local;
457 struct ieee80211_chanctx_conf *chanctx_conf;
458 struct ieee80211_channel *channel;
459 struct ieee80211_supported_band *sband;
460 struct ieee80211_sta_ht_cap *ht_cap;
461 u8 *pos;
462
463 rcu_read_lock();
464 chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf);
465 if (WARN_ON(!chanctx_conf)) {
466 rcu_read_unlock();
467 return -EINVAL;
468 }
469 channel = chanctx_conf->def.chan;
470 rcu_read_unlock();
471
472 sband = local->hw.wiphy->bands[channel->band];
473 ht_cap = &sband->ht_cap;
474
475 /* HT not allowed in 6 GHz */
476 if (sband->band == NL80211_BAND_6GHZ)
477 return 0;
478
479 if (!ht_cap->ht_supported ||
480 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_20_NOHT ||
481 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_5 ||
482 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_10)
483 return 0;
484
485 if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_ht_operation))
486 return -ENOMEM;
487
488 pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_operation));
489 ieee80211_ie_build_ht_oper(pos, ht_cap, &sdata->vif.bss_conf.chanreq.oper,
490 sdata->vif.bss_conf.ht_operation_mode,
491 false);
492
493 return 0;
494 }
495
496 int mesh_add_vht_cap_ie(struct ieee80211_sub_if_data *sdata,
497 struct sk_buff *skb)
498 {
499 struct ieee80211_supported_band *sband;
500 u8 *pos;
501
502 sband = ieee80211_get_sband(sdata);
503 if (!sband)
504 return -EINVAL;
505
506 /* VHT not allowed in 6 GHz */
507 if (sband->band == NL80211_BAND_6GHZ)
508 return 0;
509
510 if (!sband->vht_cap.vht_supported ||
511 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_20_NOHT ||
512 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_5 ||
513 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_10)
514 return 0;
515
516 if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_vht_cap))
517 return -ENOMEM;
518
519 pos = skb_put(skb, 2 + sizeof(struct ieee80211_vht_cap));
520 ieee80211_ie_build_vht_cap(pos, &sband->vht_cap, sband->vht_cap.cap);
521
522 return 0;
523 }
524
525 int mesh_add_vht_oper_ie(struct ieee80211_sub_if_data *sdata,
526 struct sk_buff *skb)
527 {
528 struct ieee80211_local *local = sdata->local;
529 struct ieee80211_chanctx_conf *chanctx_conf;
530 struct ieee80211_channel *channel;
531 struct ieee80211_supported_band *sband;
532 struct ieee80211_sta_vht_cap *vht_cap;
533 u8 *pos;
534
535 rcu_read_lock();
536 chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf);
537 if (WARN_ON(!chanctx_conf)) {
538 rcu_read_unlock();
539 return -EINVAL;
540 }
541 channel = chanctx_conf->def.chan;
542 rcu_read_unlock();
543
544 sband = local->hw.wiphy->bands[channel->band];
545 vht_cap = &sband->vht_cap;
546
547 /* VHT not allowed in 6 GHz */
548 if (sband->band == NL80211_BAND_6GHZ)
549 return 0;
550
551 if (!vht_cap->vht_supported ||
552 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_20_NOHT ||
553 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_5 ||
554 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_10)
555 return 0;
556
557 if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_vht_operation))
558 return -ENOMEM;
559
560 pos = skb_put(skb, 2 + sizeof(struct ieee80211_vht_operation));
561 ieee80211_ie_build_vht_oper(pos, vht_cap,
562 &sdata->vif.bss_conf.chanreq.oper);
563
564 return 0;
565 }
566
567 int mesh_add_he_cap_ie(struct ieee80211_sub_if_data *sdata,
568 struct sk_buff *skb, u8 ie_len)
569 {
570 struct ieee80211_supported_band *sband;
571
572 sband = ieee80211_get_sband(sdata);
573 if (!sband)
574 return -EINVAL;
575
576 if (sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_20_NOHT ||
577 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_5 ||
578 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_10)
579 return 0;
580
581 return ieee80211_put_he_cap(skb, sdata, sband, NULL);
582 }
583
584 int mesh_add_he_oper_ie(struct ieee80211_sub_if_data *sdata,
585 struct sk_buff *skb)
586 {
587 const struct ieee80211_sta_he_cap *he_cap;
588 struct ieee80211_supported_band *sband;
589 u32 len;
590 u8 *pos;
591
592 sband = ieee80211_get_sband(sdata);
593 if (!sband)
594 return -EINVAL;
595
596 he_cap = ieee80211_get_he_iftype_cap(sband, NL80211_IFTYPE_MESH_POINT);
597 if (!he_cap ||
598 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_20_NOHT ||
599 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_5 ||
600 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_10)
601 return 0;
602
603 len = 2 + 1 + sizeof(struct ieee80211_he_operation);
604 if (sdata->vif.bss_conf.chanreq.oper.chan->band == NL80211_BAND_6GHZ)
605 len += sizeof(struct ieee80211_he_6ghz_oper);
606
607 if (skb_tailroom(skb) < len)
608 return -ENOMEM;
609
610 pos = skb_put(skb, len);
611 ieee80211_ie_build_he_oper(pos, &sdata->vif.bss_conf.chanreq.oper);
612
613 return 0;
614 }
615
616 int mesh_add_he_6ghz_cap_ie(struct ieee80211_sub_if_data *sdata,
617 struct sk_buff *skb)
618 {
619 struct ieee80211_supported_band *sband;
620 const struct ieee80211_sband_iftype_data *iftd;
621
622 sband = ieee80211_get_sband(sdata);
623 if (!sband)
624 return -EINVAL;
625
626 iftd = ieee80211_get_sband_iftype_data(sband,
627 NL80211_IFTYPE_MESH_POINT);
628 /* The device doesn't support HE in mesh mode or at all */
629 if (!iftd)
630 return 0;
631
632 ieee80211_put_he_6ghz_cap(skb, sdata, sdata->deflink.smps_mode);
633 return 0;
634 }
635
636 int mesh_add_eht_cap_ie(struct ieee80211_sub_if_data *sdata,
637 struct sk_buff *skb, u8 ie_len)
638 {
639 struct ieee80211_supported_band *sband;
640
641 sband = ieee80211_get_sband(sdata);
642 if (!sband)
643 return -EINVAL;
644
645 if (sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_20_NOHT ||
646 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_5 ||
647 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_10)
648 return 0;
649
650 return ieee80211_put_eht_cap(skb, sdata, sband, NULL);
651 }
652
653 int mesh_add_eht_oper_ie(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb)
654 {
655 const struct ieee80211_sta_eht_cap *eht_cap;
656 struct ieee80211_supported_band *sband;
657 u32 len;
658 u8 *pos;
659
660 sband = ieee80211_get_sband(sdata);
661 if (!sband)
662 return -EINVAL;
663
664 eht_cap = ieee80211_get_eht_iftype_cap(sband, NL80211_IFTYPE_MESH_POINT);
665 if (!eht_cap ||
666 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_20_NOHT ||
667 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_5 ||
668 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_10)
669 return 0;
670
671 len = 2 + 1 + offsetof(struct ieee80211_eht_operation, optional) +
672 offsetof(struct ieee80211_eht_operation_info, optional);
673
674 if (skb_tailroom(skb) < len)
675 return -ENOMEM;
676
677 pos = skb_put(skb, len);
678 ieee80211_ie_build_eht_oper(pos, &sdata->vif.bss_conf.chanreq.oper, eht_cap);
679
680 return 0;
681 }
682
683 static void ieee80211_mesh_path_timer(struct timer_list *t)
684 {
685 struct ieee80211_sub_if_data *sdata =
686 from_timer(sdata, t, u.mesh.mesh_path_timer);
687
688 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work);
689 }
690
691 static void ieee80211_mesh_path_root_timer(struct timer_list *t)
692 {
693 struct ieee80211_sub_if_data *sdata =
694 from_timer(sdata, t, u.mesh.mesh_path_root_timer);
695 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
696
697 set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags);
698
699 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work);
700 }
701
702 void ieee80211_mesh_root_setup(struct ieee80211_if_mesh *ifmsh)
703 {
704 if (ifmsh->mshcfg.dot11MeshHWMPRootMode > IEEE80211_ROOTMODE_ROOT)
705 set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags);
706 else {
707 clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags);
708 /* stop running timer */
709 del_timer_sync(&ifmsh->mesh_path_root_timer);
710 }
711 }
712
713 static void
714 ieee80211_mesh_update_bss_params(struct ieee80211_sub_if_data *sdata,
715 u8 *ie, u8 ie_len)
716 {
717 struct ieee80211_supported_band *sband;
718 const struct element *cap;
719 const struct ieee80211_he_operation *he_oper = NULL;
720
721 sband = ieee80211_get_sband(sdata);
722 if (!sband)
723 return;
724
725 if (!ieee80211_get_he_iftype_cap(sband, NL80211_IFTYPE_MESH_POINT) ||
726 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_20_NOHT ||
727 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_5 ||
728 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_10)
729 return;
730
731 sdata->vif.bss_conf.he_support = true;
732
733 cap = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_OPERATION, ie, ie_len);
734 if (cap && cap->datalen >= 1 + sizeof(*he_oper) &&
735 cap->datalen >= 1 + ieee80211_he_oper_size(cap->data + 1))
736 he_oper = (void *)(cap->data + 1);
737
738 if (he_oper)
739 sdata->vif.bss_conf.he_oper.params =
740 __le32_to_cpu(he_oper->he_oper_params);
741
742 sdata->vif.bss_conf.eht_support =
743 !!ieee80211_get_eht_iftype_cap(sband, NL80211_IFTYPE_MESH_POINT);
744 }
745
746 bool ieee80211_mesh_xmit_fast(struct ieee80211_sub_if_data *sdata,
747 struct sk_buff *skb, u32 ctrl_flags)
748 {
749 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
750 struct ieee80211_mesh_fast_tx_key key = {
751 .type = MESH_FAST_TX_TYPE_LOCAL
752 };
753 struct ieee80211_mesh_fast_tx *entry;
754 struct ieee80211s_hdr *meshhdr;
755 u8 sa[ETH_ALEN] __aligned(2);
756 struct tid_ampdu_tx *tid_tx;
757 struct sta_info *sta;
758 bool copy_sa = false;
759 u16 ethertype;
760 u8 tid;
761
762 if (ctrl_flags & IEEE80211_TX_CTRL_SKIP_MPATH_LOOKUP)
763 return false;
764
765 if (ifmsh->mshcfg.dot11MeshNolearn)
766 return false;
767
768 /* Add support for these cases later */
769 if (ifmsh->ps_peers_light_sleep || ifmsh->ps_peers_deep_sleep)
770 return false;
771
772 if (is_multicast_ether_addr(skb->data))
773 return false;
774
775 ethertype = (skb->data[12] << 8) | skb->data[13];
776 if (ethertype < ETH_P_802_3_MIN)
777 return false;
778
779 if (skb->sk && skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS)
780 return false;
781
782 if (skb->ip_summed == CHECKSUM_PARTIAL) {
783 skb_set_transport_header(skb, skb_checksum_start_offset(skb));
784 if (skb_checksum_help(skb))
785 return false;
786 }
787
788 ether_addr_copy(key.addr, skb->data);
789 if (!ether_addr_equal(skb->data + ETH_ALEN, sdata->vif.addr))
790 key.type = MESH_FAST_TX_TYPE_PROXIED;
791 entry = mesh_fast_tx_get(sdata, &key);
792 if (!entry)
793 return false;
794
795 if (skb_headroom(skb) < entry->hdrlen + entry->fast_tx.hdr_len)
796 return false;
797
798 sta = rcu_dereference(entry->mpath->next_hop);
799 if (!sta)
800 return false;
801
802 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
803 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]);
804 if (tid_tx) {
805 if (!test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state))
806 return false;
807 if (tid_tx->timeout)
808 tid_tx->last_tx = jiffies;
809 }
810
811 skb = skb_share_check(skb, GFP_ATOMIC);
812 if (!skb)
813 return true;
814
815 skb_set_queue_mapping(skb, ieee80211_select_queue(sdata, sta, skb));
816
817 meshhdr = (struct ieee80211s_hdr *)entry->hdr;
818 if ((meshhdr->flags & MESH_FLAGS_AE) == MESH_FLAGS_AE_A5_A6) {
819 /* preserve SA from eth header for 6-addr frames */
820 ether_addr_copy(sa, skb->data + ETH_ALEN);
821 copy_sa = true;
822 }
823
824 memcpy(skb_push(skb, entry->hdrlen - 2 * ETH_ALEN), entry->hdr,
825 entry->hdrlen);
826
827 meshhdr = (struct ieee80211s_hdr *)skb->data;
828 put_unaligned_le32(atomic_inc_return(&sdata->u.mesh.mesh_seqnum),
829 &meshhdr->seqnum);
830 meshhdr->ttl = sdata->u.mesh.mshcfg.dot11MeshTTL;
831 if (copy_sa)
832 ether_addr_copy(meshhdr->eaddr2, sa);
833
834 skb_push(skb, 2 * ETH_ALEN);
835 __ieee80211_xmit_fast(sdata, sta, &entry->fast_tx, skb, tid_tx,
836 entry->mpath->dst, sdata->vif.addr);
837
838 return true;
839 }
840
841 /**
842 * ieee80211_fill_mesh_addresses - fill addresses of a locally originated mesh frame
843 * @hdr: 802.11 frame header
844 * @fc: frame control field
845 * @meshda: destination address in the mesh
846 * @meshsa: source address in the mesh. Same as TA, as frame is
847 * locally originated.
848 *
849 * Returns: the length of the 802.11 frame header (excludes mesh control header)
850 */
851 int ieee80211_fill_mesh_addresses(struct ieee80211_hdr *hdr, __le16 *fc,
852 const u8 *meshda, const u8 *meshsa)
853 {
854 if (is_multicast_ether_addr(meshda)) {
855 *fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS);
856 /* DA TA SA */
857 memcpy(hdr->addr1, meshda, ETH_ALEN);
858 memcpy(hdr->addr2, meshsa, ETH_ALEN);
859 memcpy(hdr->addr3, meshsa, ETH_ALEN);
860 return 24;
861 } else {
862 *fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
863 /* RA TA DA SA */
864 eth_zero_addr(hdr->addr1); /* RA is resolved later */
865 memcpy(hdr->addr2, meshsa, ETH_ALEN);
866 memcpy(hdr->addr3, meshda, ETH_ALEN);
867 memcpy(hdr->addr4, meshsa, ETH_ALEN);
868 return 30;
869 }
870 }
871
872 /**
873 * ieee80211_new_mesh_header - create a new mesh header
874 * @sdata: mesh interface to be used
875 * @meshhdr: uninitialized mesh header
876 * @addr4or5: 1st address in the ae header, which may correspond to address 4
877 * (if addr6 is NULL) or address 5 (if addr6 is present). It may
878 * be NULL.
879 * @addr6: 2nd address in the ae header, which corresponds to addr6 of the
880 * mesh frame
881 *
882 * Returns: the header length
883 */
884 unsigned int ieee80211_new_mesh_header(struct ieee80211_sub_if_data *sdata,
885 struct ieee80211s_hdr *meshhdr,
886 const char *addr4or5, const char *addr6)
887 {
888 if (WARN_ON(!addr4or5 && addr6))
889 return 0;
890
891 memset(meshhdr, 0, sizeof(*meshhdr));
892
893 meshhdr->ttl = sdata->u.mesh.mshcfg.dot11MeshTTL;
894
895 put_unaligned_le32(atomic_inc_return(&sdata->u.mesh.mesh_seqnum),
896 &meshhdr->seqnum);
897 if (addr4or5 && !addr6) {
898 meshhdr->flags |= MESH_FLAGS_AE_A4;
899 memcpy(meshhdr->eaddr1, addr4or5, ETH_ALEN);
900 return 2 * ETH_ALEN;
901 } else if (addr4or5 && addr6) {
902 meshhdr->flags |= MESH_FLAGS_AE_A5_A6;
903 memcpy(meshhdr->eaddr1, addr4or5, ETH_ALEN);
904 memcpy(meshhdr->eaddr2, addr6, ETH_ALEN);
905 return 3 * ETH_ALEN;
906 }
907
908 return ETH_ALEN;
909 }
910
911 static void ieee80211_mesh_housekeeping(struct ieee80211_sub_if_data *sdata)
912 {
913 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
914 u64 changed;
915
916 if (ifmsh->mshcfg.plink_timeout > 0)
917 ieee80211_sta_expire(sdata, ifmsh->mshcfg.plink_timeout * HZ);
918 mesh_path_expire(sdata);
919
920 changed = mesh_accept_plinks_update(sdata);
921 ieee80211_mbss_info_change_notify(sdata, changed);
922
923 mesh_fast_tx_gc(sdata);
924
925 mod_timer(&ifmsh->housekeeping_timer,
926 round_jiffies(jiffies +
927 IEEE80211_MESH_HOUSEKEEPING_INTERVAL));
928 }
929
930 static void ieee80211_mesh_rootpath(struct ieee80211_sub_if_data *sdata)
931 {
932 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
933 u32 interval;
934
935 mesh_path_tx_root_frame(sdata);
936
937 if (ifmsh->mshcfg.dot11MeshHWMPRootMode == IEEE80211_PROACTIVE_RANN)
938 interval = ifmsh->mshcfg.dot11MeshHWMPRannInterval;
939 else
940 interval = ifmsh->mshcfg.dot11MeshHWMProotInterval;
941
942 mod_timer(&ifmsh->mesh_path_root_timer,
943 round_jiffies(TU_TO_EXP_TIME(interval)));
944 }
945
946 static int
947 ieee80211_mesh_build_beacon(struct ieee80211_if_mesh *ifmsh)
948 {
949 struct beacon_data *bcn;
950 int head_len, tail_len;
951 struct sk_buff *skb;
952 struct ieee80211_mgmt *mgmt;
953 struct mesh_csa_settings *csa;
954 const struct ieee80211_supported_band *sband;
955 u8 ie_len_he_cap, ie_len_eht_cap;
956 u8 *pos;
957 struct ieee80211_sub_if_data *sdata;
958 int hdr_len = offsetofend(struct ieee80211_mgmt, u.beacon);
959 u32 rate_flags;
960
961 sdata = container_of(ifmsh, struct ieee80211_sub_if_data, u.mesh);
962
963 sband = ieee80211_get_sband(sdata);
964 rate_flags =
965 ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chanreq.oper);
966
967 ie_len_he_cap = ieee80211_ie_len_he_cap(sdata);
968 ie_len_eht_cap = ieee80211_ie_len_eht_cap(sdata);
969 head_len = hdr_len +
970 2 + /* NULL SSID */
971 /* Channel Switch Announcement */
972 2 + sizeof(struct ieee80211_channel_sw_ie) +
973 /* Mesh Channel Switch Parameters */
974 2 + sizeof(struct ieee80211_mesh_chansw_params_ie) +
975 /* Channel Switch Wrapper + Wide Bandwidth CSA IE */
976 2 + 2 + sizeof(struct ieee80211_wide_bw_chansw_ie) +
977 2 + sizeof(struct ieee80211_sec_chan_offs_ie) +
978 2 + 8 + /* supported rates */
979 2 + 3; /* DS params */
980 tail_len = 2 + (IEEE80211_MAX_SUPP_RATES - 8) +
981 2 + sizeof(struct ieee80211_ht_cap) +
982 2 + sizeof(struct ieee80211_ht_operation) +
983 2 + ifmsh->mesh_id_len +
984 2 + sizeof(struct ieee80211_meshconf_ie) +
985 2 + sizeof(__le16) + /* awake window */
986 2 + sizeof(struct ieee80211_vht_cap) +
987 2 + sizeof(struct ieee80211_vht_operation) +
988 ie_len_he_cap +
989 2 + 1 + sizeof(struct ieee80211_he_operation) +
990 sizeof(struct ieee80211_he_6ghz_oper) +
991 2 + 1 + sizeof(struct ieee80211_he_6ghz_capa) +
992 ie_len_eht_cap +
993 2 + 1 + offsetof(struct ieee80211_eht_operation, optional) +
994 offsetof(struct ieee80211_eht_operation_info, optional) +
995 ifmsh->ie_len;
996
997 bcn = kzalloc(sizeof(*bcn) + head_len + tail_len, GFP_KERNEL);
998 /* need an skb for IE builders to operate on */
999 skb = __dev_alloc_skb(max(head_len, tail_len), GFP_KERNEL);
1000
1001 if (!bcn || !skb)
1002 goto out_free;
1003
1004 /*
1005 * pointers go into the block we allocated,
1006 * memory is | beacon_data | head | tail |
1007 */
1008 bcn->head = ((u8 *) bcn) + sizeof(*bcn);
1009
1010 /* fill in the head */
1011 mgmt = skb_put_zero(skb, hdr_len);
1012 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1013 IEEE80211_STYPE_BEACON);
1014 eth_broadcast_addr(mgmt->da);
1015 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1016 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
1017 ieee80211_mps_set_frame_flags(sdata, NULL, (void *) mgmt);
1018 mgmt->u.beacon.beacon_int =
1019 cpu_to_le16(sdata->vif.bss_conf.beacon_int);
1020 mgmt->u.beacon.capab_info |= cpu_to_le16(
1021 sdata->u.mesh.security ? WLAN_CAPABILITY_PRIVACY : 0);
1022
1023 pos = skb_put(skb, 2);
1024 *pos++ = WLAN_EID_SSID;
1025 *pos++ = 0x0;
1026
1027 rcu_read_lock();
1028 csa = rcu_dereference(ifmsh->csa);
1029 if (csa) {
1030 enum nl80211_channel_type ct;
1031 struct cfg80211_chan_def *chandef;
1032 int ie_len = 2 + sizeof(struct ieee80211_channel_sw_ie) +
1033 2 + sizeof(struct ieee80211_mesh_chansw_params_ie);
1034
1035 pos = skb_put_zero(skb, ie_len);
1036 *pos++ = WLAN_EID_CHANNEL_SWITCH;
1037 *pos++ = 3;
1038 *pos++ = 0x0;
1039 *pos++ = ieee80211_frequency_to_channel(
1040 csa->settings.chandef.chan->center_freq);
1041 bcn->cntdwn_current_counter = csa->settings.count;
1042 bcn->cntdwn_counter_offsets[0] = hdr_len + 6;
1043 *pos++ = csa->settings.count;
1044 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM;
1045 *pos++ = 6;
1046 if (ifmsh->csa_role == IEEE80211_MESH_CSA_ROLE_INIT) {
1047 *pos++ = ifmsh->mshcfg.dot11MeshTTL;
1048 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
1049 } else {
1050 *pos++ = ifmsh->chsw_ttl;
1051 }
1052 *pos++ |= csa->settings.block_tx ?
1053 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
1054 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos);
1055 pos += 2;
1056 put_unaligned_le16(ifmsh->pre_value, pos);
1057 pos += 2;
1058
1059 switch (csa->settings.chandef.width) {
1060 case NL80211_CHAN_WIDTH_40:
1061 ie_len = 2 + sizeof(struct ieee80211_sec_chan_offs_ie);
1062 pos = skb_put_zero(skb, ie_len);
1063
1064 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */
1065 *pos++ = 1; /* len */
1066 ct = cfg80211_get_chandef_type(&csa->settings.chandef);
1067 if (ct == NL80211_CHAN_HT40PLUS)
1068 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
1069 else
1070 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
1071 break;
1072 case NL80211_CHAN_WIDTH_80:
1073 case NL80211_CHAN_WIDTH_80P80:
1074 case NL80211_CHAN_WIDTH_160:
1075 /* Channel Switch Wrapper + Wide Bandwidth CSA IE */
1076 ie_len = 2 + 2 +
1077 sizeof(struct ieee80211_wide_bw_chansw_ie);
1078 pos = skb_put_zero(skb, ie_len);
1079
1080 *pos++ = WLAN_EID_CHANNEL_SWITCH_WRAPPER; /* EID */
1081 *pos++ = 5; /* len */
1082 /* put sub IE */
1083 chandef = &csa->settings.chandef;
1084 ieee80211_ie_build_wide_bw_cs(pos, chandef);
1085 break;
1086 default:
1087 break;
1088 }
1089 }
1090 rcu_read_unlock();
1091
1092 if (ieee80211_put_srates_elem(skb, sband,
1093 sdata->vif.bss_conf.basic_rates,
1094 rate_flags, 0, WLAN_EID_SUPP_RATES) ||
1095 mesh_add_ds_params_ie(sdata, skb))
1096 goto out_free;
1097
1098 bcn->head_len = skb->len;
1099 memcpy(bcn->head, skb->data, bcn->head_len);
1100
1101 /* now the tail */
1102 skb_trim(skb, 0);
1103 bcn->tail = bcn->head + bcn->head_len;
1104
1105 if (ieee80211_put_srates_elem(skb, sband,
1106 sdata->vif.bss_conf.basic_rates,
1107 rate_flags, 0, WLAN_EID_EXT_SUPP_RATES) ||
1108 mesh_add_rsn_ie(sdata, skb) ||
1109 mesh_add_ht_cap_ie(sdata, skb) ||
1110 mesh_add_ht_oper_ie(sdata, skb) ||
1111 mesh_add_meshid_ie(sdata, skb) ||
1112 mesh_add_meshconf_ie(sdata, skb) ||
1113 mesh_add_awake_window_ie(sdata, skb) ||
1114 mesh_add_vht_cap_ie(sdata, skb) ||
1115 mesh_add_vht_oper_ie(sdata, skb) ||
1116 mesh_add_he_cap_ie(sdata, skb, ie_len_he_cap) ||
1117 mesh_add_he_oper_ie(sdata, skb) ||
1118 mesh_add_he_6ghz_cap_ie(sdata, skb) ||
1119 mesh_add_eht_cap_ie(sdata, skb, ie_len_eht_cap) ||
1120 mesh_add_eht_oper_ie(sdata, skb) ||
1121 mesh_add_vendor_ies(sdata, skb))
1122 goto out_free;
1123
1124 bcn->tail_len = skb->len;
1125 memcpy(bcn->tail, skb->data, bcn->tail_len);
1126 ieee80211_mesh_update_bss_params(sdata, bcn->tail, bcn->tail_len);
1127 bcn->meshconf = (struct ieee80211_meshconf_ie *)
1128 (bcn->tail + ifmsh->meshconf_offset);
1129
1130 dev_kfree_skb(skb);
1131 rcu_assign_pointer(ifmsh->beacon, bcn);
1132 return 0;
1133 out_free:
1134 kfree(bcn);
1135 dev_kfree_skb(skb);
1136 return -ENOMEM;
1137 }
1138
1139 static int
1140 ieee80211_mesh_rebuild_beacon(struct ieee80211_sub_if_data *sdata)
1141 {
1142 struct beacon_data *old_bcn;
1143 int ret;
1144
1145 old_bcn = sdata_dereference(sdata->u.mesh.beacon, sdata);
1146 ret = ieee80211_mesh_build_beacon(&sdata->u.mesh);
1147 if (ret)
1148 /* just reuse old beacon */
1149 return ret;
1150
1151 if (old_bcn)
1152 kfree_rcu(old_bcn, rcu_head);
1153 return 0;
1154 }
1155
1156 void ieee80211_mbss_info_change_notify(struct ieee80211_sub_if_data *sdata,
1157 u64 changed)
1158 {
1159 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1160 unsigned long bits = changed;
1161 u32 bit;
1162
1163 if (!bits)
1164 return;
1165
1166 /* if we race with running work, worst case this work becomes a noop */
1167 for_each_set_bit(bit, &bits, sizeof(changed) * BITS_PER_BYTE)
1168 set_bit(bit, ifmsh->mbss_changed);
1169 set_bit(MESH_WORK_MBSS_CHANGED, &ifmsh->wrkq_flags);
1170 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work);
1171 }
1172
1173 int ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata)
1174 {
1175 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1176 struct ieee80211_local *local = sdata->local;
1177 u64 changed = BSS_CHANGED_BEACON |
1178 BSS_CHANGED_BEACON_ENABLED |
1179 BSS_CHANGED_HT |
1180 BSS_CHANGED_BASIC_RATES |
1181 BSS_CHANGED_BEACON_INT |
1182 BSS_CHANGED_MCAST_RATE;
1183
1184 local->fif_other_bss++;
1185 /* mesh ifaces must set allmulti to forward mcast traffic */
1186 atomic_inc(&local->iff_allmultis);
1187 ieee80211_configure_filter(local);
1188
1189 ifmsh->mesh_cc_id = 0; /* Disabled */
1190 /* register sync ops from extensible synchronization framework */
1191 ifmsh->sync_ops = ieee80211_mesh_sync_ops_get(ifmsh->mesh_sp_id);
1192 ifmsh->sync_offset_clockdrift_max = 0;
1193 set_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags);
1194 ieee80211_mesh_root_setup(ifmsh);
1195 wiphy_work_queue(local->hw.wiphy, &sdata->work);
1196 sdata->vif.bss_conf.ht_operation_mode =
1197 ifmsh->mshcfg.ht_opmode;
1198 sdata->vif.bss_conf.enable_beacon = true;
1199
1200 changed |= ieee80211_mps_local_status_update(sdata);
1201
1202 if (ieee80211_mesh_build_beacon(ifmsh)) {
1203 ieee80211_stop_mesh(sdata);
1204 return -ENOMEM;
1205 }
1206
1207 ieee80211_recalc_dtim(local, sdata);
1208 ieee80211_link_info_change_notify(sdata, &sdata->deflink, changed);
1209
1210 netif_carrier_on(sdata->dev);
1211 return 0;
1212 }
1213
1214 void ieee80211_stop_mesh(struct ieee80211_sub_if_data *sdata)
1215 {
1216 struct ieee80211_local *local = sdata->local;
1217 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1218 struct beacon_data *bcn;
1219
1220 netif_carrier_off(sdata->dev);
1221
1222 /* flush STAs and mpaths on this iface */
1223 sta_info_flush(sdata, -1);
1224 ieee80211_free_keys(sdata, true);
1225 mesh_path_flush_by_iface(sdata);
1226
1227 /* stop the beacon */
1228 ifmsh->mesh_id_len = 0;
1229 sdata->vif.bss_conf.enable_beacon = false;
1230 sdata->beacon_rate_set = false;
1231 clear_bit(SDATA_STATE_OFFCHANNEL_BEACON_STOPPED, &sdata->state);
1232 ieee80211_link_info_change_notify(sdata, &sdata->deflink,
1233 BSS_CHANGED_BEACON_ENABLED);
1234
1235 /* remove beacon */
1236 bcn = sdata_dereference(ifmsh->beacon, sdata);
1237 RCU_INIT_POINTER(ifmsh->beacon, NULL);
1238 kfree_rcu(bcn, rcu_head);
1239
1240 /* free all potentially still buffered group-addressed frames */
1241 local->total_ps_buffered -= skb_queue_len(&ifmsh->ps.bc_buf);
1242 skb_queue_purge(&ifmsh->ps.bc_buf);
1243
1244 del_timer_sync(&sdata->u.mesh.housekeeping_timer);
1245 del_timer_sync(&sdata->u.mesh.mesh_path_root_timer);
1246 del_timer_sync(&sdata->u.mesh.mesh_path_timer);
1247
1248 /* clear any mesh work (for next join) we may have accrued */
1249 ifmsh->wrkq_flags = 0;
1250 memset(ifmsh->mbss_changed, 0, sizeof(ifmsh->mbss_changed));
1251
1252 local->fif_other_bss--;
1253 atomic_dec(&local->iff_allmultis);
1254 ieee80211_configure_filter(local);
1255 }
1256
1257 static void ieee80211_mesh_csa_mark_radar(struct ieee80211_sub_if_data *sdata)
1258 {
1259 int err;
1260
1261 /* if the current channel is a DFS channel, mark the channel as
1262 * unavailable.
1263 */
1264 err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy,
1265 &sdata->vif.bss_conf.chanreq.oper,
1266 NL80211_IFTYPE_MESH_POINT);
1267 if (err > 0)
1268 cfg80211_radar_event(sdata->local->hw.wiphy,
1269 &sdata->vif.bss_conf.chanreq.oper,
1270 GFP_ATOMIC);
1271 }
1272
1273 static bool
1274 ieee80211_mesh_process_chnswitch(struct ieee80211_sub_if_data *sdata,
1275 struct ieee802_11_elems *elems, bool beacon)
1276 {
1277 struct cfg80211_csa_settings params;
1278 struct ieee80211_csa_ie csa_ie;
1279 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1280 struct ieee80211_supported_band *sband;
1281 int err;
1282 struct ieee80211_conn_settings conn = ieee80211_conn_settings_unlimited;
1283 u32 vht_cap_info = 0;
1284
1285 lockdep_assert_wiphy(sdata->local->hw.wiphy);
1286
1287 sband = ieee80211_get_sband(sdata);
1288 if (!sband)
1289 return false;
1290
1291 switch (sdata->vif.bss_conf.chanreq.oper.width) {
1292 case NL80211_CHAN_WIDTH_20_NOHT:
1293 conn.mode = IEEE80211_CONN_MODE_LEGACY;
1294 conn.bw_limit = IEEE80211_CONN_BW_LIMIT_20;
1295 break;
1296 case NL80211_CHAN_WIDTH_20:
1297 conn.mode = IEEE80211_CONN_MODE_HT;
1298 conn.bw_limit = IEEE80211_CONN_BW_LIMIT_20;
1299 break;
1300 case NL80211_CHAN_WIDTH_40:
1301 conn.mode = IEEE80211_CONN_MODE_HT;
1302 conn.bw_limit = IEEE80211_CONN_BW_LIMIT_40;
1303 break;
1304 default:
1305 break;
1306 }
1307
1308 if (elems->vht_cap_elem)
1309 vht_cap_info =
1310 le32_to_cpu(elems->vht_cap_elem->vht_cap_info);
1311
1312 memset(¶ms, 0, sizeof(params));
1313 err = ieee80211_parse_ch_switch_ie(sdata, elems, sband->band,
1314 vht_cap_info, &conn,
1315 sdata->vif.addr, false,
1316 &csa_ie);
1317 if (err < 0)
1318 return false;
1319 if (err)
1320 return false;
1321
1322 /* Mark the channel unavailable if the reason for the switch is
1323 * regulatory.
1324 */
1325 if (csa_ie.reason_code == WLAN_REASON_MESH_CHAN_REGULATORY)
1326 ieee80211_mesh_csa_mark_radar(sdata);
1327
1328 params.chandef = csa_ie.chanreq.oper;
1329 params.count = csa_ie.count;
1330
1331 if (!cfg80211_chandef_usable(sdata->local->hw.wiphy, ¶ms.chandef,
1332 IEEE80211_CHAN_DISABLED) ||
1333 !cfg80211_reg_can_beacon(sdata->local->hw.wiphy, ¶ms.chandef,
1334 NL80211_IFTYPE_MESH_POINT)) {
1335 sdata_info(sdata,
1336 "mesh STA %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), aborting\n",
1337 sdata->vif.addr,
1338 params.chandef.chan->center_freq,
1339 params.chandef.width,
1340 params.chandef.center_freq1,
1341 params.chandef.center_freq2);
1342 return false;
1343 }
1344
1345 err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy,
1346 ¶ms.chandef,
1347 NL80211_IFTYPE_MESH_POINT);
1348 if (err < 0)
1349 return false;
1350 if (err > 0 && !ifmsh->userspace_handles_dfs) {
1351 sdata_info(sdata,
1352 "mesh STA %pM switches to channel requiring DFS (%d MHz, width:%d, CF1/2: %d/%d MHz), aborting\n",
1353 sdata->vif.addr,
1354 params.chandef.chan->center_freq,
1355 params.chandef.width,
1356 params.chandef.center_freq1,
1357 params.chandef.center_freq2);
1358 return false;
1359 }
1360
1361 params.radar_required = err;
1362
1363 if (cfg80211_chandef_identical(¶ms.chandef,
1364 &sdata->vif.bss_conf.chanreq.oper)) {
1365 mcsa_dbg(sdata,
1366 "received csa with an identical chandef, ignoring\n");
1367 return true;
1368 }
1369
1370 mcsa_dbg(sdata,
1371 "received channel switch announcement to go to channel %d MHz\n",
1372 params.chandef.chan->center_freq);
1373
1374 params.block_tx = csa_ie.mode & WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT;
1375 if (beacon) {
1376 ifmsh->chsw_ttl = csa_ie.ttl - 1;
1377 if (ifmsh->pre_value >= csa_ie.pre_value)
1378 return false;
1379 ifmsh->pre_value = csa_ie.pre_value;
1380 }
1381
1382 if (ifmsh->chsw_ttl >= ifmsh->mshcfg.dot11MeshTTL)
1383 return false;
1384
1385 ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_REPEATER;
1386
1387 if (ieee80211_channel_switch(sdata->local->hw.wiphy, sdata->dev,
1388 ¶ms) < 0)
1389 return false;
1390
1391 return true;
1392 }
1393
1394 static void
1395 ieee80211_mesh_rx_probe_req(struct ieee80211_sub_if_data *sdata,
1396 struct ieee80211_mgmt *mgmt, size_t len)
1397 {
1398 struct ieee80211_local *local = sdata->local;
1399 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1400 struct sk_buff *presp;
1401 struct beacon_data *bcn;
1402 struct ieee80211_mgmt *hdr;
1403 struct ieee802_11_elems *elems;
1404 size_t baselen;
1405 u8 *pos;
1406
1407 pos = mgmt->u.probe_req.variable;
1408 baselen = (u8 *) pos - (u8 *) mgmt;
1409 if (baselen > len)
1410 return;
1411
1412 elems = ieee802_11_parse_elems(pos, len - baselen, false, NULL);
1413 if (!elems)
1414 return;
1415
1416 if (!elems->mesh_id)
1417 goto free;
1418
1419 /* 802.11-2012 10.1.4.3.2 */
1420 if ((!ether_addr_equal(mgmt->da, sdata->vif.addr) &&
1421 !is_broadcast_ether_addr(mgmt->da)) ||
1422 elems->ssid_len != 0)
1423 goto free;
1424
1425 if (elems->mesh_id_len != 0 &&
1426 (elems->mesh_id_len != ifmsh->mesh_id_len ||
1427 memcmp(elems->mesh_id, ifmsh->mesh_id, ifmsh->mesh_id_len)))
1428 goto free;
1429
1430 rcu_read_lock();
1431 bcn = rcu_dereference(ifmsh->beacon);
1432
1433 if (!bcn)
1434 goto out;
1435
1436 presp = dev_alloc_skb(local->tx_headroom +
1437 bcn->head_len + bcn->tail_len);
1438 if (!presp)
1439 goto out;
1440
1441 skb_reserve(presp, local->tx_headroom);
1442 skb_put_data(presp, bcn->head, bcn->head_len);
1443 skb_put_data(presp, bcn->tail, bcn->tail_len);
1444 hdr = (struct ieee80211_mgmt *) presp->data;
1445 hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1446 IEEE80211_STYPE_PROBE_RESP);
1447 memcpy(hdr->da, mgmt->sa, ETH_ALEN);
1448 IEEE80211_SKB_CB(presp)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1449 ieee80211_tx_skb(sdata, presp);
1450 out:
1451 rcu_read_unlock();
1452 free:
1453 kfree(elems);
1454 }
1455
1456 static void ieee80211_mesh_rx_bcn_presp(struct ieee80211_sub_if_data *sdata,
1457 u16 stype,
1458 struct ieee80211_mgmt *mgmt,
1459 size_t len,
1460 struct ieee80211_rx_status *rx_status)
1461 {
1462 struct ieee80211_local *local = sdata->local;
1463 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1464 struct ieee802_11_elems *elems;
1465 struct ieee80211_channel *channel;
1466 size_t baselen;
1467 int freq;
1468 enum nl80211_band band = rx_status->band;
1469
1470 /* ignore ProbeResp to foreign address */
1471 if (stype == IEEE80211_STYPE_PROBE_RESP &&
1472 !ether_addr_equal(mgmt->da, sdata->vif.addr))
1473 return;
1474
1475 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1476 if (baselen > len)
1477 return;
1478
1479 elems = ieee802_11_parse_elems(mgmt->u.probe_resp.variable,
1480 len - baselen,
1481 false, NULL);
1482 if (!elems)
1483 return;
1484
1485 /* ignore non-mesh or secure / unsecure mismatch */
1486 if ((!elems->mesh_id || !elems->mesh_config) ||
1487 (elems->rsn && sdata->u.mesh.security == IEEE80211_MESH_SEC_NONE) ||
1488 (!elems->rsn && sdata->u.mesh.security != IEEE80211_MESH_SEC_NONE))
1489 goto free;
1490
1491 if (elems->ds_params)
1492 freq = ieee80211_channel_to_frequency(elems->ds_params[0], band);
1493 else
1494 freq = rx_status->freq;
1495
1496 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1497
1498 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1499 goto free;
1500
1501 if (mesh_matches_local(sdata, elems)) {
1502 mpl_dbg(sdata, "rssi_threshold=%d,rx_status->signal=%d\n",
1503 sdata->u.mesh.mshcfg.rssi_threshold, rx_status->signal);
1504 if (!sdata->u.mesh.user_mpm ||
1505 sdata->u.mesh.mshcfg.rssi_threshold == 0 ||
1506 sdata->u.mesh.mshcfg.rssi_threshold < rx_status->signal)
1507 mesh_neighbour_update(sdata, mgmt->sa, elems,
1508 rx_status);
1509
1510 if (ifmsh->csa_role != IEEE80211_MESH_CSA_ROLE_INIT &&
1511 !sdata->vif.bss_conf.csa_active)
1512 ieee80211_mesh_process_chnswitch(sdata, elems, true);
1513 }
1514
1515 if (ifmsh->sync_ops)
1516 ifmsh->sync_ops->rx_bcn_presp(sdata, stype, mgmt, len,
1517 elems->mesh_config, rx_status);
1518 free:
1519 kfree(elems);
1520 }
1521
1522 int ieee80211_mesh_finish_csa(struct ieee80211_sub_if_data *sdata, u64 *changed)
1523 {
1524 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1525 struct mesh_csa_settings *tmp_csa_settings;
1526 int ret = 0;
1527
1528 /* Reset the TTL value and Initiator flag */
1529 ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_NONE;
1530 ifmsh->chsw_ttl = 0;
1531
1532 /* Remove the CSA and MCSP elements from the beacon */
1533 tmp_csa_settings = sdata_dereference(ifmsh->csa, sdata);
1534 RCU_INIT_POINTER(ifmsh->csa, NULL);
1535 if (tmp_csa_settings)
1536 kfree_rcu(tmp_csa_settings, rcu_head);
1537 ret = ieee80211_mesh_rebuild_beacon(sdata);
1538 if (ret)
1539 return -EINVAL;
1540
1541 *changed |= BSS_CHANGED_BEACON;
1542
1543 mcsa_dbg(sdata, "complete switching to center freq %d MHz",
1544 sdata->vif.bss_conf.chanreq.oper.chan->center_freq);
1545 return 0;
1546 }
1547
1548 int ieee80211_mesh_csa_beacon(struct ieee80211_sub_if_data *sdata,
1549 struct cfg80211_csa_settings *csa_settings,
1550 u64 *changed)
1551 {
1552 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1553 struct mesh_csa_settings *tmp_csa_settings;
1554 int ret = 0;
1555
1556 lockdep_assert_wiphy(sdata->local->hw.wiphy);
1557
1558 tmp_csa_settings = kmalloc(sizeof(*tmp_csa_settings),
1559 GFP_ATOMIC);
1560 if (!tmp_csa_settings)
1561 return -ENOMEM;
1562
1563 memcpy(&tmp_csa_settings->settings, csa_settings,
1564 sizeof(struct cfg80211_csa_settings));
1565
1566 rcu_assign_pointer(ifmsh->csa, tmp_csa_settings);
1567
1568 ret = ieee80211_mesh_rebuild_beacon(sdata);
1569 if (ret) {
1570 tmp_csa_settings = rcu_dereference(ifmsh->csa);
1571 RCU_INIT_POINTER(ifmsh->csa, NULL);
1572 kfree_rcu(tmp_csa_settings, rcu_head);
1573 return ret;
1574 }
1575
1576 *changed |= BSS_CHANGED_BEACON;
1577 return 0;
1578 }
1579
1580 static int mesh_fwd_csa_frame(struct ieee80211_sub_if_data *sdata,
1581 struct ieee80211_mgmt *mgmt, size_t len,
1582 struct ieee802_11_elems *elems)
1583 {
1584 struct ieee80211_mgmt *mgmt_fwd;
1585 struct sk_buff *skb;
1586 struct ieee80211_local *local = sdata->local;
1587
1588 skb = dev_alloc_skb(local->tx_headroom + len);
1589 if (!skb)
1590 return -ENOMEM;
1591 skb_reserve(skb, local->tx_headroom);
1592 mgmt_fwd = skb_put(skb, len);
1593
1594 elems->mesh_chansw_params_ie->mesh_ttl--;
1595 elems->mesh_chansw_params_ie->mesh_flags &=
1596 ~WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
1597
1598 memcpy(mgmt_fwd, mgmt, len);
1599 eth_broadcast_addr(mgmt_fwd->da);
1600 memcpy(mgmt_fwd->sa, sdata->vif.addr, ETH_ALEN);
1601 memcpy(mgmt_fwd->bssid, sdata->vif.addr, ETH_ALEN);
1602
1603 ieee80211_tx_skb(sdata, skb);
1604 return 0;
1605 }
1606
1607 static void mesh_rx_csa_frame(struct ieee80211_sub_if_data *sdata,
1608 struct ieee80211_mgmt *mgmt, size_t len)
1609 {
1610 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1611 struct ieee802_11_elems *elems;
1612 u16 pre_value;
1613 bool fwd_csa = true;
1614 size_t baselen;
1615 u8 *pos;
1616
1617 if (mgmt->u.action.u.measurement.action_code !=
1618 WLAN_ACTION_SPCT_CHL_SWITCH)
1619 return;
1620
1621 pos = mgmt->u.action.u.chan_switch.variable;
1622 baselen = offsetof(struct ieee80211_mgmt,
1623 u.action.u.chan_switch.variable);
1624 elems = ieee802_11_parse_elems(pos, len - baselen, true, NULL);
1625 if (!elems)
1626 return;
1627
1628 if (!mesh_matches_local(sdata, elems))
1629 goto free;
1630
1631 ifmsh->chsw_ttl = elems->mesh_chansw_params_ie->mesh_ttl;
1632 if (!--ifmsh->chsw_ttl)
1633 fwd_csa = false;
1634
1635 pre_value = le16_to_cpu(elems->mesh_chansw_params_ie->mesh_pre_value);
1636 if (ifmsh->pre_value >= pre_value)
1637 goto free;
1638
1639 ifmsh->pre_value = pre_value;
1640
1641 if (!sdata->vif.bss_conf.csa_active &&
1642 !ieee80211_mesh_process_chnswitch(sdata, elems, false)) {
1643 mcsa_dbg(sdata, "Failed to process CSA action frame");
1644 goto free;
1645 }
1646
1647 /* forward or re-broadcast the CSA frame */
1648 if (fwd_csa) {
1649 if (mesh_fwd_csa_frame(sdata, mgmt, len, elems) < 0)
1650 mcsa_dbg(sdata, "Failed to forward the CSA frame");
1651 }
1652 free:
1653 kfree(elems);
1654 }
1655
1656 static void ieee80211_mesh_rx_mgmt_action(struct ieee80211_sub_if_data *sdata,
1657 struct ieee80211_mgmt *mgmt,
1658 size_t len,
1659 struct ieee80211_rx_status *rx_status)
1660 {
1661 switch (mgmt->u.action.category) {
1662 case WLAN_CATEGORY_SELF_PROTECTED:
1663 switch (mgmt->u.action.u.self_prot.action_code) {
1664 case WLAN_SP_MESH_PEERING_OPEN:
1665 case WLAN_SP_MESH_PEERING_CLOSE:
1666 case WLAN_SP_MESH_PEERING_CONFIRM:
1667 mesh_rx_plink_frame(sdata, mgmt, len, rx_status);
1668 break;
1669 }
1670 break;
1671 case WLAN_CATEGORY_MESH_ACTION:
1672 if (mesh_action_is_path_sel(mgmt))
1673 mesh_rx_path_sel_frame(sdata, mgmt, len);
1674 break;
1675 case WLAN_CATEGORY_SPECTRUM_MGMT:
1676 mesh_rx_csa_frame(sdata, mgmt, len);
1677 break;
1678 }
1679 }
1680
1681 void ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1682 struct sk_buff *skb)
1683 {
1684 struct ieee80211_rx_status *rx_status;
1685 struct ieee80211_mgmt *mgmt;
1686 u16 stype;
1687
1688 lockdep_assert_wiphy(sdata->local->hw.wiphy);
1689
1690 /* mesh already went down */
1691 if (!sdata->u.mesh.mesh_id_len)
1692 return;
1693
1694 rx_status = IEEE80211_SKB_RXCB(skb);
1695 mgmt = (struct ieee80211_mgmt *) skb->data;
1696 stype = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE;
1697
1698 switch (stype) {
1699 case IEEE80211_STYPE_PROBE_RESP:
1700 case IEEE80211_STYPE_BEACON:
1701 ieee80211_mesh_rx_bcn_presp(sdata, stype, mgmt, skb->len,
1702 rx_status);
1703 break;
1704 case IEEE80211_STYPE_PROBE_REQ:
1705 ieee80211_mesh_rx_probe_req(sdata, mgmt, skb->len);
1706 break;
1707 case IEEE80211_STYPE_ACTION:
1708 ieee80211_mesh_rx_mgmt_action(sdata, mgmt, skb->len, rx_status);
1709 break;
1710 }
1711 }
1712
1713 static void mesh_bss_info_changed(struct ieee80211_sub_if_data *sdata)
1714 {
1715 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1716 u32 bit;
1717 u64 changed = 0;
1718
1719 for_each_set_bit(bit, ifmsh->mbss_changed,
1720 sizeof(changed) * BITS_PER_BYTE) {
1721 clear_bit(bit, ifmsh->mbss_changed);
1722 changed |= BIT(bit);
1723 }
1724
1725 if (sdata->vif.bss_conf.enable_beacon &&
1726 (changed & (BSS_CHANGED_BEACON |
1727 BSS_CHANGED_HT |
1728 BSS_CHANGED_BASIC_RATES |
1729 BSS_CHANGED_BEACON_INT)))
1730 if (ieee80211_mesh_rebuild_beacon(sdata))
1731 return;
1732
1733 ieee80211_link_info_change_notify(sdata, &sdata->deflink, changed);
1734 }
1735
1736 void ieee80211_mesh_work(struct ieee80211_sub_if_data *sdata)
1737 {
1738 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1739
1740 lockdep_assert_wiphy(sdata->local->hw.wiphy);
1741
1742 /* mesh already went down */
1743 if (!sdata->u.mesh.mesh_id_len)
1744 return;
1745
1746 if (ifmsh->preq_queue_len &&
1747 time_after(jiffies,
1748 ifmsh->last_preq + msecs_to_jiffies(ifmsh->mshcfg.dot11MeshHWMPpreqMinInterval)))
1749 mesh_path_start_discovery(sdata);
1750
1751 if (test_and_clear_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags))
1752 ieee80211_mesh_housekeeping(sdata);
1753
1754 if (test_and_clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags))
1755 ieee80211_mesh_rootpath(sdata);
1756
1757 if (test_and_clear_bit(MESH_WORK_DRIFT_ADJUST, &ifmsh->wrkq_flags))
1758 mesh_sync_adjust_tsf(sdata);
1759
1760 if (test_and_clear_bit(MESH_WORK_MBSS_CHANGED, &ifmsh->wrkq_flags))
1761 mesh_bss_info_changed(sdata);
1762 }
1763
1764
1765 void ieee80211_mesh_init_sdata(struct ieee80211_sub_if_data *sdata)
1766 {
1767 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1768 static u8 zero_addr[ETH_ALEN] = {};
1769
1770 timer_setup(&ifmsh->housekeeping_timer,
1771 ieee80211_mesh_housekeeping_timer, 0);
1772
1773 ifmsh->accepting_plinks = true;
1774 atomic_set(&ifmsh->mpaths, 0);
1775 mesh_rmc_init(sdata);
1776 ifmsh->last_preq = jiffies;
1777 ifmsh->next_perr = jiffies;
1778 ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_NONE;
1779 ifmsh->nonpeer_pm = NL80211_MESH_POWER_ACTIVE;
1780 /* Allocate all mesh structures when creating the first mesh interface. */
1781 if (!mesh_allocated)
1782 ieee80211s_init();
1783
1784 mesh_pathtbl_init(sdata);
1785
1786 timer_setup(&ifmsh->mesh_path_timer, ieee80211_mesh_path_timer, 0);
1787 timer_setup(&ifmsh->mesh_path_root_timer,
1788 ieee80211_mesh_path_root_timer, 0);
1789 INIT_LIST_HEAD(&ifmsh->preq_queue.list);
1790 skb_queue_head_init(&ifmsh->ps.bc_buf);
1791 spin_lock_init(&ifmsh->mesh_preq_queue_lock);
1792 spin_lock_init(&ifmsh->sync_offset_lock);
1793 RCU_INIT_POINTER(ifmsh->beacon, NULL);
1794
1795 sdata->vif.bss_conf.bssid = zero_addr;
1796 }
1797
1798 void ieee80211_mesh_teardown_sdata(struct ieee80211_sub_if_data *sdata)
1799 {
1800 mesh_rmc_free(sdata);
1801 mesh_pathtbl_unregister(sdata);
1802 }
1803
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