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d2912cb1 1// SPDX-License-Identifier: GPL-2.0-only
2e3c8736 2/*
264d9b7d 3 * Copyright (c) 2008, 2009 open80211s Ltd.
15ddba5f 4 * Copyright (C) 2018 - 2023 Intel Corporation
2e3c8736
LCC		 5 * Authors: Luis Carlos Cobo <luisca@cozybit.com>
6 * Javier Cardona <javier@cozybit.com>
2e3c8736
LCC		 7 */
8
5a0e3ad6 9#include <linux/slab.h>
51ceddad 10#include <asm/unaligned.h>
2e3c8736
LCC		 11#include "ieee80211_i.h"
12#include "mesh.h"
d5edb9ae 13#include "wme.h"
b8456a14 14#include "driver-ops.h"
2e3c8736 15
bf7cd94d 16static int mesh_allocated;
2e3c8736
LCC		 17static struct kmem_cache *rm_cache;
18
25d49e4d
TP		 19bool 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}
25d49e4d 24
2e3c8736
LCC		 25void ieee80211s_init(void)
26{
2e3c8736
LCC		 27 mesh_allocated = 1;
28 rm_cache = kmem_cache_create("mesh_rmc", sizeof(struct rmc_entry),
29 0, 0, NULL);
30}
31
32void ieee80211s_stop(void)
33{
bf7cd94d
JB		 34 if (!mesh_allocated)
35 return;
2e3c8736
LCC		 36 kmem_cache_destroy(rm_cache);
37}
38
34f11cd3 39static void ieee80211_mesh_housekeeping_timer(struct timer_list *t)
472dbc45 40{
34f11cd3
KC		 41 struct ieee80211_sub_if_data *sdata =
42 from_timer(sdata, t, u.mesh.housekeeping_timer);
472dbc45
JB		 43 struct ieee80211_local *local = sdata->local;
44 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
45
6b9ac442 46 set_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags);
5bb644a0 47
16114496 48 wiphy_work_queue(local->hw.wiphy, &sdata->work);
472dbc45
JB		 49}
50
2e3c8736
LCC		 51/**
52 * mesh_matches_local - check if the config of a mesh point matches ours
53 *
f698d856 54 * @sdata: local mesh subif
f743ff49 55 * @ie: information elements of a management frame from the mesh peer
2e3c8736
LCC		 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.
c00de1c4
BB		 59 *
60 * Returns: %true if both nodes belong to the same mesh
2e3c8736 61 */
f743ff49
TP		 62bool mesh_matches_local(struct ieee80211_sub_if_data *sdata,
63 struct ieee802_11_elems *ie)
2e3c8736 64{
472dbc45 65 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
f743ff49 66 u32 basic_rates = 0;
4bf88530 67 struct cfg80211_chan_def sta_chan_def;
21a8e9dd 68 struct ieee80211_supported_band *sband;
2a333a0d 69 u32 vht_cap_info = 0;
2e3c8736 70
2e3c8736
LCC		 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 */
739522ba
TP		 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)))
bf7cd94d 88 return false;
739522ba 89
21a8e9dd
MSS		 90 sband = ieee80211_get_sband(sdata);
91 if (!sband)
92 return false;
93
94 ieee80211_sta_get_rates(sdata, ie, sband->band,
f743ff49
TP		 95 &basic_rates);
96
fe40cb62 97 if (sdata->vif.bss_conf.basic_rates != basic_rates)
bf7cd94d 98 return false;
fe40cb62 99
8ac3c704
JB		 100 cfg80211_chandef_create(&sta_chan_def, sdata->vif.bss_conf.chandef.chan,
101 NL80211_CHAN_NO_HT);
102 ieee80211_chandef_ht_oper(ie->ht_operation, &sta_chan_def);
2a333a0d
JB		 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,
7eb26df2
JB		 108 ie->vht_operation, ie->ht_operation,
109 &sta_chan_def);
df1875c4 110 ieee80211_chandef_he_6ghz_oper(sdata, ie->he_operation, ie->eht_operation,
5dca295d 111 &sta_chan_def);
c85fb53c 112
4bf88530
JB		 113 if (!cfg80211_chandef_compatible(&sdata->vif.bss_conf.chandef,
114 &sta_chan_def))
bf7cd94d 115 return false;
2e3c8736 116
739522ba 117 return true;
2e3c8736
LCC		 118}
119
120/**
121 * mesh_peer_accepts_plinks - check if an mp is willing to establish peer links
122 *
123 * @ie: information elements of a management frame from the mesh peer
c00de1c4
BB		 124 *
125 * Returns: %true if the mesh peer is willing to establish peer links
2e3c8736 126 */
f698d856 127bool mesh_peer_accepts_plinks(struct ieee802_11_elems *ie)
2e3c8736 128{
136cfa28 129 return (ie->mesh_config->meshconf_cap &
bf7cd94d 130 IEEE80211_MESHCONF_CAPAB_ACCEPT_PLINKS) != 0;
2e3c8736
LCC		 131}
132
133/**
2c53040f 134 * mesh_accept_plinks_update - update accepting_plink in local mesh beacons
2e3c8736 135 *
d0709a65 136 * @sdata: mesh interface in which mesh beacons are going to be updated
df323818
MP		 137 *
138 * Returns: beacon changed flag if the beacon content changed.
2e3c8736 139 */
15ddba5f 140u64 mesh_accept_plinks_update(struct ieee80211_sub_if_data *sdata)
2e3c8736 141{
2e3c8736 142 bool free_plinks;
15ddba5f 143 u64 changed = 0;
2e3c8736
LCC		 144
145 /* In case mesh_plink_free_count > 0 and mesh_plinktbl_capacity == 0,
146 * the mesh interface might be able to establish plinks with peers that
b4e08ea1
LCC		 147 * are already on the table but are not on PLINK_ESTAB state. However,
148 * in general the mesh interface is not accepting peer link requests
149 * from new peers, and that must be reflected in the beacon
2e3c8736
LCC		 150 */
151 free_plinks = mesh_plink_availables(sdata);
152
df323818
MP		 153 if (free_plinks != sdata->u.mesh.accepting_plinks) {
154 sdata->u.mesh.accepting_plinks = free_plinks;
155 changed = BSS_CHANGED_BEACON;
156 }
157
158 return changed;
2e3c8736
LCC		 159}
160
45b5028e
TP		 161/*
162 * mesh_sta_cleanup - clean up any mesh sta state
163 *
164 * @sta: mesh sta to clean up.
165 */
166void mesh_sta_cleanup(struct sta_info *sta)
167{
168 struct ieee80211_sub_if_data *sdata = sta->sdata;
15ddba5f 169 u64 changed = mesh_plink_deactivate(sta);
fe7a7c57 170
f81a9ded 171 if (changed)
2b5e1967 172 ieee80211_mbss_info_change_notify(sdata, changed);
45b5028e
TP		 173}
174
f698d856 175int mesh_rmc_init(struct ieee80211_sub_if_data *sdata)
2e3c8736 176{
2e3c8736
LCC		 177 int i;
178
472dbc45
JB		 179 sdata->u.mesh.rmc = kmalloc(sizeof(struct mesh_rmc), GFP_KERNEL);
180 if (!sdata->u.mesh.rmc)
2e3c8736 181 return -ENOMEM;
472dbc45 182 sdata->u.mesh.rmc->idx_mask = RMC_BUCKETS - 1;
2e3c8736 183 for (i = 0; i < RMC_BUCKETS; i++)
47a0489c 184 INIT_HLIST_HEAD(&sdata->u.mesh.rmc->bucket[i]);
2e3c8736
LCC		 185 return 0;
186}
187
f698d856 188void mesh_rmc_free(struct ieee80211_sub_if_data *sdata)
2e3c8736 189{
472dbc45 190 struct mesh_rmc *rmc = sdata->u.mesh.rmc;
47a0489c
BC		 191 struct rmc_entry *p;
192 struct hlist_node *n;
2e3c8736
LCC		 193 int i;
194
472dbc45 195 if (!sdata->u.mesh.rmc)
2e3c8736
LCC		 196 return;
197
bf7cd94d 198 for (i = 0; i < RMC_BUCKETS; i++) {
47a0489c
BC		 199 hlist_for_each_entry_safe(p, n, &rmc->bucket[i], list) {
200 hlist_del(&p->list);
2e3c8736
LCC		 201 kmem_cache_free(rm_cache, p);
202 }
bf7cd94d 203 }
2e3c8736
LCC		 204
205 kfree(rmc);
472dbc45 206 sdata->u.mesh.rmc = NULL;
2e3c8736
LCC		 207}
208
209/**
210 * mesh_rmc_check - Check frame in recent multicast cache and add if absent.
211 *
bf7cd94d 212 * @sdata: interface
2e3c8736
LCC		 213 * @sa: source address
214 * @mesh_hdr: mesh_header
215 *
216 * Returns: 0 if the frame is not in the cache, nonzero otherwise.
217 *
218 * Checks using the source address and the mesh sequence number if we have
219 * received this frame lately. If the frame is not in the cache, it is added to
220 * it.
221 */
bf7cd94d
JB		 222int mesh_rmc_check(struct ieee80211_sub_if_data *sdata,
223 const u8 *sa, struct ieee80211s_hdr *mesh_hdr)
2e3c8736 224{
472dbc45 225 struct mesh_rmc *rmc = sdata->u.mesh.rmc;
2e3c8736
LCC		 226 u32 seqnum = 0;
227 int entries = 0;
228 u8 idx;
47a0489c
BC		 229 struct rmc_entry *p;
230 struct hlist_node *n;
2e3c8736 231
0aa7fabb
BC		 232 if (!rmc)
233 return -1;
234
2e3c8736 235 /* Don't care about endianness since only match matters */
51ceddad
LCC		 236 memcpy(&seqnum, &mesh_hdr->seqnum, sizeof(mesh_hdr->seqnum));
237 idx = le32_to_cpu(mesh_hdr->seqnum) & rmc->idx_mask;
47a0489c 238 hlist_for_each_entry_safe(p, n, &rmc->bucket[idx], list) {
2e3c8736
LCC		 239 ++entries;
240 if (time_after(jiffies, p->exp_time) ||
bf7cd94d 241 entries == RMC_QUEUE_MAX_LEN) {
47a0489c 242 hlist_del(&p->list);
2e3c8736
LCC		 243 kmem_cache_free(rm_cache, p);
244 --entries;
bf7cd94d 245 } else if ((seqnum == p->seqnum) && ether_addr_equal(sa, p->sa))
2e3c8736
LCC		 246 return -1;
247 }
248
249 p = kmem_cache_alloc(rm_cache, GFP_ATOMIC);
d15b8459 250 if (!p)
2e3c8736 251 return 0;
d15b8459 252
2e3c8736
LCC		 253 p->seqnum = seqnum;
254 p->exp_time = jiffies + RMC_TIMEOUT;
255 memcpy(p->sa, sa, ETH_ALEN);
47a0489c 256 hlist_add_head(&p->list, &rmc->bucket[idx]);
2e3c8736
LCC		 257 return 0;
258}
259
bf7cd94d
JB		 260int mesh_add_meshconf_ie(struct ieee80211_sub_if_data *sdata,
261 struct sk_buff *skb)
082ebb0c
TP		 262{
263 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
264 u8 *pos, neighbors;
265 u8 meshconf_len = sizeof(struct ieee80211_meshconf_ie);
4a6ecd35 266 bool is_connected_to_gate = ifmsh->num_gates > 0 ||
01d66fbd
BC		 267 ifmsh->mshcfg.dot11MeshGateAnnouncementProtocol ||
268 ifmsh->mshcfg.dot11MeshConnectedToMeshGate;
184eebe6 269 bool is_connected_to_as = ifmsh->mshcfg.dot11MeshConnectedToAuthServer;
082ebb0c
TP		 270
271 if (skb_tailroom(skb) < 2 + meshconf_len)
272 return -ENOMEM;
273
274 pos = skb_put(skb, 2 + meshconf_len);
275 *pos++ = WLAN_EID_MESH_CONFIG;
276 *pos++ = meshconf_len;
277
43552be1
TP		 278 /* save a pointer for quick updates in pre-tbtt */
279 ifmsh->meshconf_offset = pos - skb->data;
280
082ebb0c
TP		 281 /* Active path selection protocol ID */
282 *pos++ = ifmsh->mesh_pp_id;
283 /* Active path selection metric ID */
284 *pos++ = ifmsh->mesh_pm_id;
285 /* Congestion control mode identifier */
286 *pos++ = ifmsh->mesh_cc_id;
287 /* Synchronization protocol identifier */
288 *pos++ = ifmsh->mesh_sp_id;
289 /* Authentication Protocol identifier */
290 *pos++ = ifmsh->mesh_auth_id;
291 /* Mesh Formation Info - number of neighbors */
1258d976 292 neighbors = atomic_read(&ifmsh->estab_plinks);
e05ecccd 293 neighbors = min_t(int, neighbors, IEEE80211_MAX_MESH_PEERINGS);
184eebe6
MT		 294 *pos++ = (is_connected_to_as << 7) |
295 (neighbors << 1) |
296 is_connected_to_gate;
082ebb0c 297 /* Mesh capability */
b60e527a
CYY		 298 *pos = 0x00;
299 *pos |= ifmsh->mshcfg.dot11MeshForwarding ?
300 IEEE80211_MESHCONF_CAPAB_FORWARDING : 0x00;
dbf498fb 301 *pos |= ifmsh->accepting_plinks ?
bf7cd94d 302 IEEE80211_MESHCONF_CAPAB_ACCEPT_PLINKS : 0x00;
3f52b7e3
MP		 303 /* Mesh PS mode. See IEEE802.11-2012 8.4.2.100.8 */
304 *pos |= ifmsh->ps_peers_deep_sleep ?
bf7cd94d 305 IEEE80211_MESHCONF_CAPAB_POWER_SAVE_LEVEL : 0x00;
082ebb0c
TP		 306 return 0;
307}
308
bf7cd94d 309int mesh_add_meshid_ie(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb)
082ebb0c
TP		 310{
311 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
312 u8 *pos;
313
314 if (skb_tailroom(skb) < 2 + ifmsh->mesh_id_len)
315 return -ENOMEM;
316
317 pos = skb_put(skb, 2 + ifmsh->mesh_id_len);
318 *pos++ = WLAN_EID_MESH_ID;
319 *pos++ = ifmsh->mesh_id_len;
320 if (ifmsh->mesh_id_len)
321 memcpy(pos, ifmsh->mesh_id, ifmsh->mesh_id_len);
322
323 return 0;
324}
325
bf7cd94d
JB		 326static int mesh_add_awake_window_ie(struct ieee80211_sub_if_data *sdata,
327 struct sk_buff *skb)
3f52b7e3
MP		 328{
329 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
330 u8 *pos;
331
332 /* see IEEE802.11-2012 13.14.6 */
333 if (ifmsh->ps_peers_light_sleep == 0 &&
334 ifmsh->ps_peers_deep_sleep == 0 &&
335 ifmsh->nonpeer_pm == NL80211_MESH_POWER_ACTIVE)
336 return 0;
337
338 if (skb_tailroom(skb) < 4)
339 return -ENOMEM;
340
341 pos = skb_put(skb, 2 + 2);
342 *pos++ = WLAN_EID_MESH_AWAKE_WINDOW;
343 *pos++ = 2;
344 put_unaligned_le16(ifmsh->mshcfg.dot11MeshAwakeWindowDuration, pos);
345
346 return 0;
347}
348
bf7cd94d
JB		 349int mesh_add_vendor_ies(struct ieee80211_sub_if_data *sdata,
350 struct sk_buff *skb)
082ebb0c
TP		 351{
352 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
353 u8 offset, len;
354 const u8 *data;
355
356 if (!ifmsh->ie || !ifmsh->ie_len)
357 return 0;
358
359 /* fast-forward to vendor IEs */
360 offset = ieee80211_ie_split_vendor(ifmsh->ie, ifmsh->ie_len, 0);
361
da7061c8 362 if (offset < ifmsh->ie_len) {
082ebb0c
TP		 363 len = ifmsh->ie_len - offset;
364 data = ifmsh->ie + offset;
365 if (skb_tailroom(skb) < len)
366 return -ENOMEM;
59ae1d12 367 skb_put_data(skb, data, len);
082ebb0c
TP		 368 }
369
370 return 0;
371}
372
bf7cd94d 373int mesh_add_rsn_ie(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb)
082ebb0c
TP		 374{
375 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
376 u8 len = 0;
377 const u8 *data;
378
379 if (!ifmsh->ie || !ifmsh->ie_len)
380 return 0;
381
382 /* find RSN IE */
a40a8c17
BC		 383 data = cfg80211_find_ie(WLAN_EID_RSN, ifmsh->ie, ifmsh->ie_len);
384 if (!data)
385 return 0;
082ebb0c 386
a40a8c17
BC		 387 len = data[1] + 2;
388
389 if (skb_tailroom(skb) < len)
390 return -ENOMEM;
59ae1d12 391 skb_put_data(skb, data, len);
082ebb0c
TP		 392
393 return 0;
394}
395
bf7cd94d
JB		 396static int mesh_add_ds_params_ie(struct ieee80211_sub_if_data *sdata,
397 struct sk_buff *skb)
082ebb0c 398{
55de908a
JB		 399 struct ieee80211_chanctx_conf *chanctx_conf;
400 struct ieee80211_channel *chan;
082ebb0c 401 u8 *pos;
2e3c8736 402
082ebb0c
TP		 403 if (skb_tailroom(skb) < 3)
404 return -ENOMEM;
405
55de908a 406 rcu_read_lock();
d0a9123e 407 chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf);
55de908a
JB		 408 if (WARN_ON(!chanctx_conf)) {
409 rcu_read_unlock();
410 return -EINVAL;
411 }
4bf88530 412 chan = chanctx_conf->def.chan;
55de908a
JB		 413 rcu_read_unlock();
414
601513aa
ET		 415 pos = skb_put(skb, 2 + 1);
416 *pos++ = WLAN_EID_DS_PARAMS;
417 *pos++ = 1;
418 *pos++ = ieee80211_frequency_to_channel(chan->center_freq);
be125c60 419
082ebb0c 420 return 0;
2e3c8736
LCC		 421}
422
bf7cd94d
JB		 423int mesh_add_ht_cap_ie(struct ieee80211_sub_if_data *sdata,
424 struct sk_buff *skb)
176f3608 425{
176f3608
TP		 426 struct ieee80211_supported_band *sband;
427 u8 *pos;
428
21a8e9dd
MSS		 429 sband = ieee80211_get_sband(sdata);
430 if (!sband)
431 return -EINVAL;
432
607ca9ea
RM		 433 /* HT not allowed in 6 GHz */
434 if (sband->band == NL80211_BAND_6GHZ)
435 return 0;
436
176f3608 437 if (!sband->ht_cap.ht_supported ||
0418a445
SW		 438 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT ||
439 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 ||
440 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10)
176f3608
TP		 441 return 0;
442
443 if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_ht_cap))
444 return -ENOMEM;
445
446 pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_cap));
ef96a842 447 ieee80211_ie_build_ht_cap(pos, &sband->ht_cap, sband->ht_cap.cap);
176f3608
TP		 448
449 return 0;
450}
451
bf7cd94d
JB		 452int mesh_add_ht_oper_ie(struct ieee80211_sub_if_data *sdata,
453 struct sk_buff *skb)
176f3608
TP		 454{
455 struct ieee80211_local *local = sdata->local;
55de908a
JB		 456 struct ieee80211_chanctx_conf *chanctx_conf;
457 struct ieee80211_channel *channel;
55de908a
JB		 458 struct ieee80211_supported_band *sband;
459 struct ieee80211_sta_ht_cap *ht_cap;
176f3608
TP		 460 u8 *pos;
461
55de908a 462 rcu_read_lock();
d0a9123e 463 chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf);
55de908a
JB		 464 if (WARN_ON(!chanctx_conf)) {
465 rcu_read_unlock();
466 return -EINVAL;
467 }
4bf88530 468 channel = chanctx_conf->def.chan;
55de908a
JB		 469 rcu_read_unlock();
470
471 sband = local->hw.wiphy->bands[channel->band];
472 ht_cap = &sband->ht_cap;
473
607ca9ea
RM		 474 /* HT not allowed in 6 GHz */
475 if (sband->band == NL80211_BAND_6GHZ)
476 return 0;
477
c85fb53c
BC		 478 if (!ht_cap->ht_supported ||
479 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT ||
480 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 ||
481 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10)
176f3608
TP		 482 return 0;
483
074d46d1 484 if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_ht_operation))
176f3608
TP		 485 return -ENOMEM;
486
074d46d1 487 pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_operation));
4bf88530 488 ieee80211_ie_build_ht_oper(pos, ht_cap, &sdata->vif.bss_conf.chandef,
57f255f5
AN		 489 sdata->vif.bss_conf.ht_operation_mode,
490 false);
176f3608
TP		 491
492 return 0;
493}
bf7cd94d 494
c85fb53c
BC		 495int mesh_add_vht_cap_ie(struct ieee80211_sub_if_data *sdata,
496 struct sk_buff *skb)
497{
c85fb53c
BC		 498 struct ieee80211_supported_band *sband;
499 u8 *pos;
500
21a8e9dd
MSS		 501 sband = ieee80211_get_sband(sdata);
502 if (!sband)
503 return -EINVAL;
504
607ca9ea
RM		 505 /* VHT not allowed in 6 GHz */
506 if (sband->band == NL80211_BAND_6GHZ)
507 return 0;
508
c85fb53c
BC		 509 if (!sband->vht_cap.vht_supported ||
510 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT ||
511 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 ||
512 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10)
513 return 0;
514
515 if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_vht_cap))
516 return -ENOMEM;
517
518 pos = skb_put(skb, 2 + sizeof(struct ieee80211_vht_cap));
519 ieee80211_ie_build_vht_cap(pos, &sband->vht_cap, sband->vht_cap.cap);
520
521 return 0;
522}
523
524int mesh_add_vht_oper_ie(struct ieee80211_sub_if_data *sdata,
525 struct sk_buff *skb)
526{
527 struct ieee80211_local *local = sdata->local;
528 struct ieee80211_chanctx_conf *chanctx_conf;
529 struct ieee80211_channel *channel;
530 struct ieee80211_supported_band *sband;
531 struct ieee80211_sta_vht_cap *vht_cap;
532 u8 *pos;
533
534 rcu_read_lock();
d0a9123e 535 chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf);
c85fb53c
BC		 536 if (WARN_ON(!chanctx_conf)) {
537 rcu_read_unlock();
538 return -EINVAL;
539 }
540 channel = chanctx_conf->def.chan;
541 rcu_read_unlock();
542
543 sband = local->hw.wiphy->bands[channel->band];
544 vht_cap = &sband->vht_cap;
545
607ca9ea
RM		 546 /* VHT not allowed in 6 GHz */
547 if (sband->band == NL80211_BAND_6GHZ)
548 return 0;
549
c85fb53c
BC		 550 if (!vht_cap->vht_supported ||
551 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT ||
552 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 ||
553 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10)
554 return 0;
555
556 if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_vht_operation))
557 return -ENOMEM;
558
559 pos = skb_put(skb, 2 + sizeof(struct ieee80211_vht_operation));
560 ieee80211_ie_build_vht_oper(pos, vht_cap,
561 &sdata->vif.bss_conf.chandef);
562
563 return 0;
564}
565
60ad72da
SE		 566int mesh_add_he_cap_ie(struct ieee80211_sub_if_data *sdata,
567 struct sk_buff *skb, u8 ie_len)
568{
569 const struct ieee80211_sta_he_cap *he_cap;
570 struct ieee80211_supported_band *sband;
571 u8 *pos;
572
573 sband = ieee80211_get_sband(sdata);
574 if (!sband)
575 return -EINVAL;
576
577 he_cap = ieee80211_get_he_iftype_cap(sband, NL80211_IFTYPE_MESH_POINT);
578
579 if (!he_cap ||
580 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT ||
581 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 ||
582 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10)
583 return 0;
584
585 if (skb_tailroom(skb) < ie_len)
586 return -ENOMEM;
587
588 pos = skb_put(skb, ie_len);
1f2c1044 589 ieee80211_ie_build_he_cap(0, pos, he_cap, pos + ie_len);
60ad72da
SE		 590
591 return 0;
592}
593
594int mesh_add_he_oper_ie(struct ieee80211_sub_if_data *sdata,
595 struct sk_buff *skb)
596{
597 const struct ieee80211_sta_he_cap *he_cap;
598 struct ieee80211_supported_band *sband;
d1b7524b 599 u32 len;
60ad72da
SE		 600 u8 *pos;
601
602 sband = ieee80211_get_sband(sdata);
603 if (!sband)
604 return -EINVAL;
605
606 he_cap = ieee80211_get_he_iftype_cap(sband, NL80211_IFTYPE_MESH_POINT);
607 if (!he_cap ||
608 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT ||
609 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 ||
610 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10)
611 return 0;
612
d1b7524b
RM		 613 len = 2 + 1 + sizeof(struct ieee80211_he_operation);
614 if (sdata->vif.bss_conf.chandef.chan->band == NL80211_BAND_6GHZ)
615 len += sizeof(struct ieee80211_he_6ghz_oper);
616
617 if (skb_tailroom(skb) < len)
60ad72da
SE		 618 return -ENOMEM;
619
d1b7524b
RM		 620 pos = skb_put(skb, len);
621 ieee80211_ie_build_he_oper(pos, &sdata->vif.bss_conf.chandef);
60ad72da
SE		 622
623 return 0;
624}
625
24a2042c
RM		 626int mesh_add_he_6ghz_cap_ie(struct ieee80211_sub_if_data *sdata,
627 struct sk_buff *skb)
628{
65ad3ef9
RM		 629 struct ieee80211_supported_band *sband;
630 const struct ieee80211_sband_iftype_data *iftd;
631
632 sband = ieee80211_get_sband(sdata);
633 if (!sband)
634 return -EINVAL;
635
636 iftd = ieee80211_get_sband_iftype_data(sband,
637 NL80211_IFTYPE_MESH_POINT);
638 /* The device doesn't support HE in mesh mode or at all */
639 if (!iftd)
640 return 0;
641
abd27d06 642 ieee80211_ie_build_he_6ghz_cap(sdata, sdata->deflink.smps_mode, skb);
24a2042c
RM		 643 return 0;
644}
645
df1875c4
RL		 646int mesh_add_eht_cap_ie(struct ieee80211_sub_if_data *sdata,
647 struct sk_buff *skb, u8 ie_len)
648{
649 const struct ieee80211_sta_he_cap *he_cap;
650 const struct ieee80211_sta_eht_cap *eht_cap;
651 struct ieee80211_supported_band *sband;
652 u8 *pos;
653
654 sband = ieee80211_get_sband(sdata);
655 if (!sband)
656 return -EINVAL;
657
658 he_cap = ieee80211_get_he_iftype_cap(sband, NL80211_IFTYPE_MESH_POINT);
659 eht_cap = ieee80211_get_eht_iftype_cap(sband, NL80211_IFTYPE_MESH_POINT);
660 if (!he_cap || !eht_cap ||
661 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT ||
662 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 ||
663 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10)
664 return 0;
665
666 if (skb_tailroom(skb) < ie_len)
667 return -ENOMEM;
668
669 pos = skb_put(skb, ie_len);
670 ieee80211_ie_build_eht_cap(pos, he_cap, eht_cap, pos + ie_len, false);
671
672 return 0;
673}
674
675int mesh_add_eht_oper_ie(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb)
676{
677 const struct ieee80211_sta_eht_cap *eht_cap;
678 struct ieee80211_supported_band *sband;
679 u32 len;
680 u8 *pos;
681
682 sband = ieee80211_get_sband(sdata);
683 if (!sband)
684 return -EINVAL;
685
686 eht_cap = ieee80211_get_eht_iftype_cap(sband, NL80211_IFTYPE_MESH_POINT);
687 if (!eht_cap ||
688 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT ||
689 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 ||
690 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10)
691 return 0;
692
693 len = 2 + 1 + offsetof(struct ieee80211_eht_operation, optional) +
694 offsetof(struct ieee80211_eht_operation_info, optional);
695
696 if (skb_tailroom(skb) < len)
697 return -ENOMEM;
698
699 pos = skb_put(skb, len);
700 ieee80211_ie_build_eht_oper(pos, &sdata->vif.bss_conf.chandef, eht_cap);
701
702 return 0;
703}
704
34f11cd3 705static void ieee80211_mesh_path_timer(struct timer_list *t)
2e3c8736
LCC		 706{
707 struct ieee80211_sub_if_data *sdata =
34f11cd3 708 from_timer(sdata, t, u.mesh.mesh_path_timer);
5bb644a0 709
16114496 710 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work);
2e3c8736
LCC		 711}
712
34f11cd3 713static void ieee80211_mesh_path_root_timer(struct timer_list *t)
e304bfd3
RP		 714{
715 struct ieee80211_sub_if_data *sdata =
34f11cd3 716 from_timer(sdata, t, u.mesh.mesh_path_root_timer);
e304bfd3 717 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
e304bfd3
RP		 718
719 set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags);
720
16114496 721 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work);
e304bfd3
RP		 722}
723
63c5723b
RP		 724void ieee80211_mesh_root_setup(struct ieee80211_if_mesh *ifmsh)
725{
dbb912cd 726 if (ifmsh->mshcfg.dot11MeshHWMPRootMode > IEEE80211_ROOTMODE_ROOT)
63c5723b
RP		 727 set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags);
728 else {
729 clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags);
730 /* stop running timer */
731 del_timer_sync(&ifmsh->mesh_path_root_timer);
732 }
733}
734
70debba3
PKC		 735static void
736ieee80211_mesh_update_bss_params(struct ieee80211_sub_if_data *sdata,
737 u8 *ie, u8 ie_len)
738{
739 struct ieee80211_supported_band *sband;
636707e5 740 const struct element *cap;
70debba3
PKC		 741 const struct ieee80211_he_operation *he_oper = NULL;
742
743 sband = ieee80211_get_sband(sdata);
744 if (!sband)
745 return;
746
747 if (!ieee80211_get_he_iftype_cap(sband, NL80211_IFTYPE_MESH_POINT) ||
748 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT ||
749 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 ||
750 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10)
751 return;
752
753 sdata->vif.bss_conf.he_support = true;
754
636707e5
JB		 755 cap = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_OPERATION, ie, ie_len);
756 if (cap && cap->datalen >= 1 + sizeof(*he_oper) &&
757 cap->datalen >= 1 + ieee80211_he_oper_size(cap->data + 1))
758 he_oper = (void *)(cap->data + 1);
70debba3
PKC		 759
760 if (he_oper)
761 sdata->vif.bss_conf.he_oper.params =
762 __le32_to_cpu(he_oper->he_oper_params);
df1875c4
RL		 763
764 sdata->vif.bss_conf.eht_support =
765 !!ieee80211_get_eht_iftype_cap(sband, NL80211_IFTYPE_MESH_POINT);
70debba3
PKC		 766}
767
d5edb9ae
FF		 768bool ieee80211_mesh_xmit_fast(struct ieee80211_sub_if_data *sdata,
769 struct sk_buff *skb, u32 ctrl_flags)
770{
771 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
772 struct ieee80211_mesh_fast_tx *entry;
773 struct ieee80211s_hdr *meshhdr;
774 u8 sa[ETH_ALEN] __aligned(2);
775 struct tid_ampdu_tx *tid_tx;
776 struct sta_info *sta;
777 bool copy_sa = false;
778 u16 ethertype;
779 u8 tid;
780
781 if (ctrl_flags & IEEE80211_TX_CTRL_SKIP_MPATH_LOOKUP)
782 return false;
783
784 if (ifmsh->mshcfg.dot11MeshNolearn)
785 return false;
786
787 /* Add support for these cases later */
788 if (ifmsh->ps_peers_light_sleep || ifmsh->ps_peers_deep_sleep)
789 return false;
790
791 if (is_multicast_ether_addr(skb->data))
792 return false;
793
794 ethertype = (skb->data[12] << 8) | skb->data[13];
795 if (ethertype < ETH_P_802_3_MIN)
796 return false;
797
798 if (skb->sk && skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS)
799 return false;
800
801 if (skb->ip_summed == CHECKSUM_PARTIAL) {
802 skb_set_transport_header(skb, skb_checksum_start_offset(skb));
803 if (skb_checksum_help(skb))
804 return false;
805 }
806
807 entry = mesh_fast_tx_get(sdata, skb->data);
808 if (!entry)
809 return false;
810
811 if (skb_headroom(skb) < entry->hdrlen + entry->fast_tx.hdr_len)
812 return false;
813
814 sta = rcu_dereference(entry->mpath->next_hop);
815 if (!sta)
816 return false;
817
818 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
819 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]);
820 if (tid_tx) {
821 if (!test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state))
822 return false;
823 if (tid_tx->timeout)
824 tid_tx->last_tx = jiffies;
825 }
826
827 skb = skb_share_check(skb, GFP_ATOMIC);
828 if (!skb)
829 return true;
830
831 skb_set_queue_mapping(skb, ieee80211_select_queue(sdata, sta, skb));
832
833 meshhdr = (struct ieee80211s_hdr *)entry->hdr;
834 if ((meshhdr->flags & MESH_FLAGS_AE) == MESH_FLAGS_AE_A5_A6) {
835 /* preserve SA from eth header for 6-addr frames */
836 ether_addr_copy(sa, skb->data + ETH_ALEN);
837 copy_sa = true;
838 }
839
840 memcpy(skb_push(skb, entry->hdrlen - 2 * ETH_ALEN), entry->hdr,
841 entry->hdrlen);
842
843 meshhdr = (struct ieee80211s_hdr *)skb->data;
844 put_unaligned_le32(atomic_inc_return(&sdata->u.mesh.mesh_seqnum),
845 &meshhdr->seqnum);
846 meshhdr->ttl = sdata->u.mesh.mshcfg.dot11MeshTTL;
847 if (copy_sa)
848 ether_addr_copy(meshhdr->eaddr2, sa);
849
850 skb_push(skb, 2 * ETH_ALEN);
851 __ieee80211_xmit_fast(sdata, sta, &entry->fast_tx, skb, tid_tx,
852 entry->mpath->dst, sdata->vif.addr);
853
854 return true;
855}
856
3c5772a5
JC		 857/**
858 * ieee80211_fill_mesh_addresses - fill addresses of a locally originated mesh frame
bf7cd94d 859 * @hdr: 802.11 frame header
3c5772a5
JC		 860 * @fc: frame control field
861 * @meshda: destination address in the mesh
13880a3b 862 * @meshsa: source address in the mesh. Same as TA, as frame is
3c5772a5
JC		 863 * locally originated.
864 *
c00de1c4 865 * Returns: the length of the 802.11 frame header (excludes mesh control header)
3c5772a5 866 */
15ff6365
JB		 867int ieee80211_fill_mesh_addresses(struct ieee80211_hdr *hdr, __le16 *fc,
868 const u8 *meshda, const u8 *meshsa)
869{
3c5772a5
JC		 870 if (is_multicast_ether_addr(meshda)) {
871 *fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS);
872 /* DA TA SA */
873 memcpy(hdr->addr1, meshda, ETH_ALEN);
874 memcpy(hdr->addr2, meshsa, ETH_ALEN);
875 memcpy(hdr->addr3, meshsa, ETH_ALEN);
876 return 24;
877 } else {
2154c81c 878 *fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
3c5772a5 879 /* RA TA DA SA */
c84a67a2 880 eth_zero_addr(hdr->addr1); /* RA is resolved later */
3c5772a5
JC		 881 memcpy(hdr->addr2, meshsa, ETH_ALEN);
882 memcpy(hdr->addr3, meshda, ETH_ALEN);
883 memcpy(hdr->addr4, meshsa, ETH_ALEN);
884 return 30;
885 }
886}
887
902acc78
JB		 888/**
889 * ieee80211_new_mesh_header - create a new mesh header
902acc78 890 * @sdata: mesh interface to be used
bf7cd94d 891 * @meshhdr: uninitialized mesh header
61ad5394
JC		 892 * @addr4or5: 1st address in the ae header, which may correspond to address 4
893 * (if addr6 is NULL) or address 5 (if addr6 is present). It may
894 * be NULL.
895 * @addr6: 2nd address in the ae header, which corresponds to addr6 of the
896 * mesh frame
902acc78 897 *
c00de1c4 898 * Returns: the header length
902acc78 899 */
5edfcee5
AH		 900unsigned int ieee80211_new_mesh_header(struct ieee80211_sub_if_data *sdata,
901 struct ieee80211s_hdr *meshhdr,
902 const char *addr4or5, const char *addr6)
902acc78 903{
bf7cd94d
JB		 904 if (WARN_ON(!addr4or5 && addr6))
905 return 0;
906
0c3cee72 907 memset(meshhdr, 0, sizeof(*meshhdr));
bf7cd94d 908
472dbc45 909 meshhdr->ttl = sdata->u.mesh.mshcfg.dot11MeshTTL;
bf7cd94d 910
e626dad9
FF		 911 put_unaligned_le32(atomic_inc_return(&sdata->u.mesh.mesh_seqnum),
912 &meshhdr->seqnum);
61ad5394 913 if (addr4or5 && !addr6) {
3c5772a5 914 meshhdr->flags |= MESH_FLAGS_AE_A4;
61ad5394 915 memcpy(meshhdr->eaddr1, addr4or5, ETH_ALEN);
bf7cd94d 916 return 2 * ETH_ALEN;
61ad5394 917 } else if (addr4or5 && addr6) {
3c5772a5 918 meshhdr->flags |= MESH_FLAGS_AE_A5_A6;
61ad5394
JC		 919 memcpy(meshhdr->eaddr1, addr4or5, ETH_ALEN);
920 memcpy(meshhdr->eaddr2, addr6, ETH_ALEN);
bf7cd94d 921 return 3 * ETH_ALEN;
3c5772a5 922 }
bf7cd94d
JB		 923
924 return ETH_ALEN;
902acc78
JB		 925}
926
bf7cd94d 927static void ieee80211_mesh_housekeeping(struct ieee80211_sub_if_data *sdata)
472dbc45 928{
bf7cd94d 929 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
15ddba5f 930 u64 changed;
472dbc45 931
31f909a2
MH		 932 if (ifmsh->mshcfg.plink_timeout > 0)
933 ieee80211_sta_expire(sdata, ifmsh->mshcfg.plink_timeout * HZ);
472dbc45
JB		 934 mesh_path_expire(sdata);
935
df323818 936 changed = mesh_accept_plinks_update(sdata);
2b5e1967 937 ieee80211_mbss_info_change_notify(sdata, changed);
472dbc45 938
d5edb9ae
FF		 939 mesh_fast_tx_gc(sdata);
940
472dbc45 941 mod_timer(&ifmsh->housekeeping_timer,
bf7cd94d
JB		 942 round_jiffies(jiffies +
943 IEEE80211_MESH_HOUSEKEEPING_INTERVAL));
472dbc45
JB		 944}
945
e304bfd3
RP		 946static void ieee80211_mesh_rootpath(struct ieee80211_sub_if_data *sdata)
947{
948 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
a69cc44f 949 u32 interval;
e304bfd3
RP		 950
951 mesh_path_tx_root_frame(sdata);
a69cc44f
CYY		 952
953 if (ifmsh->mshcfg.dot11MeshHWMPRootMode == IEEE80211_PROACTIVE_RANN)
954 interval = ifmsh->mshcfg.dot11MeshHWMPRannInterval;
955 else
956 interval = ifmsh->mshcfg.dot11MeshHWMProotInterval;
957
e304bfd3 958 mod_timer(&ifmsh->mesh_path_root_timer,
a69cc44f 959 round_jiffies(TU_TO_EXP_TIME(interval)));
e304bfd3
RP		 960}
961
2b5e1967
TP		 962static int
963ieee80211_mesh_build_beacon(struct ieee80211_if_mesh *ifmsh)
964{
965 struct beacon_data *bcn;
966 int head_len, tail_len;
967 struct sk_buff *skb;
968 struct ieee80211_mgmt *mgmt;
969 struct ieee80211_chanctx_conf *chanctx_conf;
b8456a14 970 struct mesh_csa_settings *csa;
57fbcce3 971 enum nl80211_band band;
df1875c4 972 u8 ie_len_he_cap, ie_len_eht_cap;
2b5e1967
TP		 973 u8 *pos;
974 struct ieee80211_sub_if_data *sdata;
4c121fd6 975 int hdr_len = offsetofend(struct ieee80211_mgmt, u.beacon);
2b5e1967
TP		 976
977 sdata = container_of(ifmsh, struct ieee80211_sub_if_data, u.mesh);
978 rcu_read_lock();
d0a9123e 979 chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf);
2b5e1967
TP		 980 band = chanctx_conf->def.chan->band;
981 rcu_read_unlock();
982
60ad72da
SE		 983 ie_len_he_cap = ieee80211_ie_len_he_cap(sdata,
984 NL80211_IFTYPE_MESH_POINT);
df1875c4
RL		 985 ie_len_eht_cap = ieee80211_ie_len_eht_cap(sdata,
986 NL80211_IFTYPE_MESH_POINT);
2b5e1967
TP		 987 head_len = hdr_len +
988 2 + /* NULL SSID */
b8456a14
CYY		 989 /* Channel Switch Announcement */
990 2 + sizeof(struct ieee80211_channel_sw_ie) +
08a7e621 991 /* Mesh Channel Switch Parameters */
b8456a14 992 2 + sizeof(struct ieee80211_mesh_chansw_params_ie) +
75d627d5
SW		 993 /* Channel Switch Wrapper + Wide Bandwidth CSA IE */
994 2 + 2 + sizeof(struct ieee80211_wide_bw_chansw_ie) +
995 2 + sizeof(struct ieee80211_sec_chan_offs_ie) +
2b5e1967
TP		 996 2 + 8 + /* supported rates */
997 2 + 3; /* DS params */
998 tail_len = 2 + (IEEE80211_MAX_SUPP_RATES - 8) +
999 2 + sizeof(struct ieee80211_ht_cap) +
1000 2 + sizeof(struct ieee80211_ht_operation) +
1001 2 + ifmsh->mesh_id_len +
1002 2 + sizeof(struct ieee80211_meshconf_ie) +
1003 2 + sizeof(__le16) + /* awake window */
c85fb53c
BC		 1004 2 + sizeof(struct ieee80211_vht_cap) +
1005 2 + sizeof(struct ieee80211_vht_operation) +
60ad72da
SE		 1006 ie_len_he_cap +
1007 2 + 1 + sizeof(struct ieee80211_he_operation) +
d1b7524b 1008 sizeof(struct ieee80211_he_6ghz_oper) +
24a2042c 1009 2 + 1 + sizeof(struct ieee80211_he_6ghz_capa) +
df1875c4
RL		 1010 ie_len_eht_cap +
1011 2 + 1 + offsetof(struct ieee80211_eht_operation, optional) +
1012 offsetof(struct ieee80211_eht_operation_info, optional) +
2b5e1967
TP		 1013 ifmsh->ie_len;
1014
1015 bcn = kzalloc(sizeof(*bcn) + head_len + tail_len, GFP_KERNEL);
1016 /* need an skb for IE builders to operate on */
60df54f8 1017 skb = __dev_alloc_skb(max(head_len, tail_len), GFP_KERNEL);
2b5e1967
TP		 1018
1019 if (!bcn || !skb)
1020 goto out_free;
1021
1022 /*
1023 * pointers go into the block we allocated,
1024 * memory is | beacon_data | head | tail |
1025 */
1026 bcn->head = ((u8 *) bcn) + sizeof(*bcn);
1027
1028 /* fill in the head */
b080db58 1029 mgmt = skb_put_zero(skb, hdr_len);
2b5e1967
TP		 1030 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1031 IEEE80211_STYPE_BEACON);
1032 eth_broadcast_addr(mgmt->da);
1033 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1034 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
1035 ieee80211_mps_set_frame_flags(sdata, NULL, (void *) mgmt);
1036 mgmt->u.beacon.beacon_int =
1037 cpu_to_le16(sdata->vif.bss_conf.beacon_int);
1038 mgmt->u.beacon.capab_info |= cpu_to_le16(
1039 sdata->u.mesh.security ? WLAN_CAPABILITY_PRIVACY : 0);
1040
1041 pos = skb_put(skb, 2);
1042 *pos++ = WLAN_EID_SSID;
1043 *pos++ = 0x0;
1044
b8456a14
CYY		 1045 rcu_read_lock();
1046 csa = rcu_dereference(ifmsh->csa);
1047 if (csa) {
75d627d5
SW		 1048 enum nl80211_channel_type ct;
1049 struct cfg80211_chan_def *chandef;
1050 int ie_len = 2 + sizeof(struct ieee80211_channel_sw_ie) +
1051 2 + sizeof(struct ieee80211_mesh_chansw_params_ie);
1052
e45a79da 1053 pos = skb_put_zero(skb, ie_len);
b8456a14
CYY		 1054 *pos++ = WLAN_EID_CHANNEL_SWITCH;
1055 *pos++ = 3;
1056 *pos++ = 0x0;
1057 *pos++ = ieee80211_frequency_to_channel(
1058 csa->settings.chandef.chan->center_freq);
8552a434
JC		 1059 bcn->cntdwn_current_counter = csa->settings.count;
1060 bcn->cntdwn_counter_offsets[0] = hdr_len + 6;
b8456a14
CYY		 1061 *pos++ = csa->settings.count;
1062 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM;
1063 *pos++ = 6;
0cb4d4dc 1064 if (ifmsh->csa_role == IEEE80211_MESH_CSA_ROLE_INIT) {
b8456a14
CYY		 1065 *pos++ = ifmsh->mshcfg.dot11MeshTTL;
1066 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
1067 } else {
1068 *pos++ = ifmsh->chsw_ttl;
1069 }
1070 *pos++ |= csa->settings.block_tx ?
1071 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
1072 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos);
1073 pos += 2;
ca91dc97 1074 put_unaligned_le16(ifmsh->pre_value, pos);
b8456a14 1075 pos += 2;
75d627d5
SW		 1076
1077 switch (csa->settings.chandef.width) {
1078 case NL80211_CHAN_WIDTH_40:
1079 ie_len = 2 + sizeof(struct ieee80211_sec_chan_offs_ie);
e45a79da 1080 pos = skb_put_zero(skb, ie_len);
75d627d5
SW		 1081
1082 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */
1083 *pos++ = 1; /* len */
1084 ct = cfg80211_get_chandef_type(&csa->settings.chandef);
1085 if (ct == NL80211_CHAN_HT40PLUS)
1086 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
1087 else
1088 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
1089 break;
1090 case NL80211_CHAN_WIDTH_80:
1091 case NL80211_CHAN_WIDTH_80P80:
1092 case NL80211_CHAN_WIDTH_160:
1093 /* Channel Switch Wrapper + Wide Bandwidth CSA IE */
1094 ie_len = 2 + 2 +
1095 sizeof(struct ieee80211_wide_bw_chansw_ie);
e45a79da 1096 pos = skb_put_zero(skb, ie_len);
75d627d5
SW		 1097
1098 *pos++ = WLAN_EID_CHANNEL_SWITCH_WRAPPER; /* EID */
1099 *pos++ = 5; /* len */
1100 /* put sub IE */
1101 chandef = &csa->settings.chandef;
1102 ieee80211_ie_build_wide_bw_cs(pos, chandef);
1103 break;
1104 default:
1105 break;
1106 }
b8456a14
CYY		 1107 }
1108 rcu_read_unlock();
1109
2b5e1967 1110 if (ieee80211_add_srates_ie(sdata, skb, true, band) ||
bf7cd94d 1111 mesh_add_ds_params_ie(sdata, skb))
2b5e1967
TP		 1112 goto out_free;
1113
1114 bcn->head_len = skb->len;
1115 memcpy(bcn->head, skb->data, bcn->head_len);
1116
1117 /* now the tail */
1118 skb_trim(skb, 0);
1119 bcn->tail = bcn->head + bcn->head_len;
1120
1121 if (ieee80211_add_ext_srates_ie(sdata, skb, true, band) ||
bf7cd94d
JB		 1122 mesh_add_rsn_ie(sdata, skb) ||
1123 mesh_add_ht_cap_ie(sdata, skb) ||
1124 mesh_add_ht_oper_ie(sdata, skb) ||
1125 mesh_add_meshid_ie(sdata, skb) ||
1126 mesh_add_meshconf_ie(sdata, skb) ||
1127 mesh_add_awake_window_ie(sdata, skb) ||
c85fb53c
BC		 1128 mesh_add_vht_cap_ie(sdata, skb) ||
1129 mesh_add_vht_oper_ie(sdata, skb) ||
60ad72da
SE		 1130 mesh_add_he_cap_ie(sdata, skb, ie_len_he_cap) ||
1131 mesh_add_he_oper_ie(sdata, skb) ||
24a2042c 1132 mesh_add_he_6ghz_cap_ie(sdata, skb) ||
df1875c4
RL		 1133 mesh_add_eht_cap_ie(sdata, skb, ie_len_eht_cap) ||
1134 mesh_add_eht_oper_ie(sdata, skb) ||
bf7cd94d 1135 mesh_add_vendor_ies(sdata, skb))
2b5e1967
TP		 1136 goto out_free;
1137
1138 bcn->tail_len = skb->len;
1139 memcpy(bcn->tail, skb->data, bcn->tail_len);
70debba3 1140 ieee80211_mesh_update_bss_params(sdata, bcn->tail, bcn->tail_len);
43552be1
TP		 1141 bcn->meshconf = (struct ieee80211_meshconf_ie *)
1142 (bcn->tail + ifmsh->meshconf_offset);
2b5e1967
TP		 1143
1144 dev_kfree_skb(skb);
1145 rcu_assign_pointer(ifmsh->beacon, bcn);
1146 return 0;
1147out_free:
1148 kfree(bcn);
1149 dev_kfree_skb(skb);
1150 return -ENOMEM;
1151}
1152
1153static int
8d61ffa5 1154ieee80211_mesh_rebuild_beacon(struct ieee80211_sub_if_data *sdata)
2b5e1967 1155{
2b5e1967
TP		 1156 struct beacon_data *old_bcn;
1157 int ret;
2b5e1967 1158
6858ad75 1159 old_bcn = sdata_dereference(sdata->u.mesh.beacon, sdata);
8d61ffa5 1160 ret = ieee80211_mesh_build_beacon(&sdata->u.mesh);
2b5e1967
TP		 1161 if (ret)
1162 /* just reuse old beacon */
8d61ffa5 1163 return ret;
2b5e1967
TP		 1164
1165 if (old_bcn)
1166 kfree_rcu(old_bcn, rcu_head);
8d61ffa5 1167 return 0;
2b5e1967
TP		 1168}
1169
1170void ieee80211_mbss_info_change_notify(struct ieee80211_sub_if_data *sdata,
15ddba5f 1171 u64 changed)
2b5e1967 1172{
f81a9ded
TP		 1173 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1174 unsigned long bits = changed;
1175 u32 bit;
1176
1177 if (!bits)
1178 return;
1179
1180 /* if we race with running work, worst case this work becomes a noop */
1181 for_each_set_bit(bit, &bits, sizeof(changed) * BITS_PER_BYTE)
6e48ebff 1182 set_bit(bit, ifmsh->mbss_changed);
f81a9ded 1183 set_bit(MESH_WORK_MBSS_CHANGED, &ifmsh->wrkq_flags);
16114496 1184 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work);
2b5e1967
TP		 1185}
1186
1187int ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata)
472dbc45
JB		 1188{
1189 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1190 struct ieee80211_local *local = sdata->local;
15ddba5f 1191 u64 changed = BSS_CHANGED_BEACON |
f4eabc91
CYY		 1192 BSS_CHANGED_BEACON_ENABLED |
1193 BSS_CHANGED_HT |
1194 BSS_CHANGED_BASIC_RATES |
dcbe73ca
PKC		 1195 BSS_CHANGED_BEACON_INT |
1196 BSS_CHANGED_MCAST_RATE;
472dbc45 1197
09b17470
JB		 1198 local->fif_other_bss++;
1199 /* mesh ifaces must set allmulti to forward mcast traffic */
1200 atomic_inc(&local->iff_allmultis);
1201 ieee80211_configure_filter(local);
1202
c7108a71 1203 ifmsh->mesh_cc_id = 0; /* Disabled */
dbf498fb
JC		 1204 /* register sync ops from extensible synchronization framework */
1205 ifmsh->sync_ops = ieee80211_mesh_sync_ops_get(ifmsh->mesh_sp_id);
dbf498fb 1206 ifmsh->sync_offset_clockdrift_max = 0;
6b9ac442 1207 set_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags);
63c5723b 1208 ieee80211_mesh_root_setup(ifmsh);
16114496 1209 wiphy_work_queue(local->hw.wiphy, &sdata->work);
70c33eaa
AN		 1210 sdata->vif.bss_conf.ht_operation_mode =
1211 ifmsh->mshcfg.ht_opmode;
d6a83228 1212 sdata->vif.bss_conf.enable_beacon = true;
f4eabc91 1213
39886b61 1214 changed |= ieee80211_mps_local_status_update(sdata);
3f52b7e3 1215
2b5e1967
TP		 1216 if (ieee80211_mesh_build_beacon(ifmsh)) {
1217 ieee80211_stop_mesh(sdata);
1218 return -ENOMEM;
1219 }
1220
057d5f4b 1221 ieee80211_recalc_dtim(local, sdata);
d8675a63 1222 ieee80211_link_info_change_notify(sdata, &sdata->deflink, changed);
c405c629
JB		 1223
1224 netif_carrier_on(sdata->dev);
2b5e1967 1225 return 0;
472dbc45
JB		 1226}
1227
1228void ieee80211_stop_mesh(struct ieee80211_sub_if_data *sdata)
1229{
09b17470 1230 struct ieee80211_local *local = sdata->local;
29cbe68c 1231 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
2b5e1967 1232 struct beacon_data *bcn;
29cbe68c 1233
c405c629
JB		 1234 netif_carrier_off(sdata->dev);
1235
c37a54ac
MH		 1236 /* flush STAs and mpaths on this iface */
1237 sta_info_flush(sdata);
0112fa55 1238 ieee80211_free_keys(sdata, true);
c37a54ac
MH		 1239 mesh_path_flush_by_iface(sdata);
1240
0d466b9c 1241 /* stop the beacon */
29cbe68c 1242 ifmsh->mesh_id_len = 0;
d6a83228 1243 sdata->vif.bss_conf.enable_beacon = false;
08fad438 1244 sdata->beacon_rate_set = false;
d6a83228 1245 clear_bit(SDATA_STATE_OFFCHANNEL_BEACON_STOPPED, &sdata->state);
d8675a63
JB		 1246 ieee80211_link_info_change_notify(sdata, &sdata->deflink,
1247 BSS_CHANGED_BEACON_ENABLED);
c37a54ac
MH		 1248
1249 /* remove beacon */
6858ad75 1250 bcn = sdata_dereference(ifmsh->beacon, sdata);
0c2bef46 1251 RCU_INIT_POINTER(ifmsh->beacon, NULL);
2b5e1967 1252 kfree_rcu(bcn, rcu_head);
0d466b9c 1253
3f52b7e3
MP		 1254 /* free all potentially still buffered group-addressed frames */
1255 local->total_ps_buffered -= skb_queue_len(&ifmsh->ps.bc_buf);
1256 skb_queue_purge(&ifmsh->ps.bc_buf);
1257
472dbc45 1258 del_timer_sync(&sdata->u.mesh.housekeeping_timer);
e304bfd3 1259 del_timer_sync(&sdata->u.mesh.mesh_path_root_timer);
dd4c9260 1260 del_timer_sync(&sdata->u.mesh.mesh_path_timer);
09b17470 1261
f81a9ded
TP		 1262 /* clear any mesh work (for next join) we may have accrued */
1263 ifmsh->wrkq_flags = 0;
6e48ebff 1264 memset(ifmsh->mbss_changed, 0, sizeof(ifmsh->mbss_changed));
f81a9ded 1265
09b17470
JB		 1266 local->fif_other_bss--;
1267 atomic_dec(&local->iff_allmultis);
1268 ieee80211_configure_filter(local);
472dbc45
JB		 1269}
1270
5d55371b
BB		 1271static void ieee80211_mesh_csa_mark_radar(struct ieee80211_sub_if_data *sdata)
1272{
1273 int err;
1274
1275 /* if the current channel is a DFS channel, mark the channel as
1276 * unavailable.
1277 */
1278 err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy,
1279 &sdata->vif.bss_conf.chandef,
1280 NL80211_IFTYPE_MESH_POINT);
1281 if (err > 0)
1282 cfg80211_radar_event(sdata->local->hw.wiphy,
1283 &sdata->vif.bss_conf.chandef, GFP_ATOMIC);
1284}
1285
33a45867
CYY		 1286static bool
1287ieee80211_mesh_process_chnswitch(struct ieee80211_sub_if_data *sdata,
1288 struct ieee802_11_elems *elems, bool beacon)
1289{
1290 struct cfg80211_csa_settings params;
1291 struct ieee80211_csa_ie csa_ie;
33a45867 1292 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
21a8e9dd 1293 struct ieee80211_supported_band *sband;
0cb4d4dc 1294 int err;
ba323e29
JB		 1295 ieee80211_conn_flags_t conn_flags = 0;
1296 u32 vht_cap_info = 0;
33a45867 1297
076fc877 1298 lockdep_assert_wiphy(sdata->local->hw.wiphy);
dbd72850 1299
21a8e9dd
MSS		 1300 sband = ieee80211_get_sband(sdata);
1301 if (!sband)
1302 return false;
1303
33a45867
CYY		 1304 switch (sdata->vif.bss_conf.chandef.width) {
1305 case NL80211_CHAN_WIDTH_20_NOHT:
ba323e29 1306 conn_flags |= IEEE80211_CONN_DISABLE_HT;
fc0561dc 1307 fallthrough;
33a45867 1308 case NL80211_CHAN_WIDTH_20:
ba323e29 1309 conn_flags |= IEEE80211_CONN_DISABLE_40MHZ;
fc0561dc 1310 fallthrough;
71ec289e 1311 case NL80211_CHAN_WIDTH_40:
ba323e29 1312 conn_flags |= IEEE80211_CONN_DISABLE_VHT;
33a45867
CYY		 1313 break;
1314 default:
1315 break;
1316 }
1317
2a333a0d
JB		 1318 if (elems->vht_cap_elem)
1319 vht_cap_info =
1320 le32_to_cpu(elems->vht_cap_elem->vht_cap_info);
1321
33a45867 1322 memset(&params, 0, sizeof(params));
21a8e9dd 1323 err = ieee80211_parse_ch_switch_ie(sdata, elems, sband->band,
2a333a0d 1324 vht_cap_info,
ba323e29 1325 conn_flags, sdata->vif.addr,
33a45867
CYY		 1326 &csa_ie);
1327 if (err < 0)
1328 return false;
1329 if (err)
1330 return false;
1331
5d55371b
BB		 1332 /* Mark the channel unavailable if the reason for the switch is
1333 * regulatory.
1334 */
1335 if (csa_ie.reason_code == WLAN_REASON_MESH_CHAN_REGULATORY)
1336 ieee80211_mesh_csa_mark_radar(sdata);
1337
33a45867
CYY		 1338 params.chandef = csa_ie.chandef;
1339 params.count = csa_ie.count;
1340
33a45867 1341 if (!cfg80211_chandef_usable(sdata->local->hw.wiphy, &params.chandef,
0ab2e55d
BB		 1342 IEEE80211_CHAN_DISABLED) ||
1343 !cfg80211_reg_can_beacon(sdata->local->hw.wiphy, &params.chandef,
1344 NL80211_IFTYPE_MESH_POINT)) {
33a45867
CYY		 1345 sdata_info(sdata,
1346 "mesh STA %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), aborting\n",
1347 sdata->vif.addr,
1348 params.chandef.chan->center_freq,
1349 params.chandef.width,
1350 params.chandef.center_freq1,
1351 params.chandef.center_freq2);
1352 return false;
1353 }
1354
1355 err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy,
2beb6dab
LC		 1356 &params.chandef,
1357 NL80211_IFTYPE_MESH_POINT);
33a45867
CYY		 1358 if (err < 0)
1359 return false;
0ab2e55d
BB		 1360 if (err > 0 && !ifmsh->userspace_handles_dfs) {
1361 sdata_info(sdata,
1362 "mesh STA %pM switches to channel requiring DFS (%d MHz, width:%d, CF1/2: %d/%d MHz), aborting\n",
1363 sdata->vif.addr,
1364 params.chandef.chan->center_freq,
1365 params.chandef.width,
1366 params.chandef.center_freq1,
1367 params.chandef.center_freq2);
33a45867 1368 return false;
0ab2e55d 1369 }
2beb6dab
LC		 1370
1371 params.radar_required = err;
33a45867 1372
0cb4d4dc
LC		 1373 if (cfg80211_chandef_identical(&params.chandef,
1374 &sdata->vif.bss_conf.chandef)) {
1375 mcsa_dbg(sdata,
1376 "received csa with an identical chandef, ignoring\n");
1377 return true;
1378 }
33a45867
CYY		 1379
1380 mcsa_dbg(sdata,
1381 "received channel switch announcement to go to channel %d MHz\n",
1382 params.chandef.chan->center_freq);
1383
1384 params.block_tx = csa_ie.mode & WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT;
3f718fd8 1385 if (beacon) {
33a45867 1386 ifmsh->chsw_ttl = csa_ie.ttl - 1;
3f718fd8
CYY		 1387 if (ifmsh->pre_value >= csa_ie.pre_value)
1388 return false;
1389 ifmsh->pre_value = csa_ie.pre_value;
1390 }
33a45867 1391
0cb4d4dc 1392 if (ifmsh->chsw_ttl >= ifmsh->mshcfg.dot11MeshTTL)
3f718fd8 1393 return false;
33a45867 1394
0cb4d4dc 1395 ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_REPEATER;
33a45867 1396
0cb4d4dc
LC		 1397 if (ieee80211_channel_switch(sdata->local->hw.wiphy, sdata->dev,
1398 &params) < 0)
1399 return false;
33a45867
CYY		 1400
1401 return true;
33a45867
CYY		 1402}
1403
9fb04b50
TP		 1404static void
1405ieee80211_mesh_rx_probe_req(struct ieee80211_sub_if_data *sdata,
1406 struct ieee80211_mgmt *mgmt, size_t len)
1407{
1408 struct ieee80211_local *local = sdata->local;
1409 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1410 struct sk_buff *presp;
1411 struct beacon_data *bcn;
1412 struct ieee80211_mgmt *hdr;
5d24828d 1413 struct ieee802_11_elems *elems;
9fb04b50 1414 size_t baselen;
511044ea 1415 u8 *pos;
9fb04b50 1416
9fb04b50
TP		 1417 pos = mgmt->u.probe_req.variable;
1418 baselen = (u8 *) pos - (u8 *) mgmt;
1419 if (baselen > len)
1420 return;
1421
38c6aa29 1422 elems = ieee802_11_parse_elems(pos, len - baselen, false, NULL);
5d24828d 1423 if (!elems)
a4ef66a9
CYY		 1424 return;
1425
5d24828d
JB		 1426 if (!elems->mesh_id)
1427 goto free;
1428
9fb04b50
TP		 1429 /* 802.11-2012 10.1.4.3.2 */
1430 if ((!ether_addr_equal(mgmt->da, sdata->vif.addr) &&
1431 !is_broadcast_ether_addr(mgmt->da)) ||
5d24828d
JB		 1432 elems->ssid_len != 0)
1433 goto free;
9fb04b50 1434
5d24828d
JB		 1435 if (elems->mesh_id_len != 0 &&
1436 (elems->mesh_id_len != ifmsh->mesh_id_len ||
1437 memcmp(elems->mesh_id, ifmsh->mesh_id, ifmsh->mesh_id_len)))
1438 goto free;
9fb04b50
TP		 1439
1440 rcu_read_lock();
1441 bcn = rcu_dereference(ifmsh->beacon);
1442
1443 if (!bcn)
1444 goto out;
1445
1446 presp = dev_alloc_skb(local->tx_headroom +
1447 bcn->head_len + bcn->tail_len);
1448 if (!presp)
1449 goto out;
1450
1451 skb_reserve(presp, local->tx_headroom);
59ae1d12
JB		 1452 skb_put_data(presp, bcn->head, bcn->head_len);
1453 skb_put_data(presp, bcn->tail, bcn->tail_len);
9fb04b50
TP		 1454 hdr = (struct ieee80211_mgmt *) presp->data;
1455 hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1456 IEEE80211_STYPE_PROBE_RESP);
1457 memcpy(hdr->da, mgmt->sa, ETH_ALEN);
9fb04b50
TP		 1458 IEEE80211_SKB_CB(presp)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1459 ieee80211_tx_skb(sdata, presp);
1460out:
1461 rcu_read_unlock();
5d24828d
JB		 1462free:
1463 kfree(elems);
9fb04b50
TP		 1464}
1465
472dbc45
JB		 1466static void ieee80211_mesh_rx_bcn_presp(struct ieee80211_sub_if_data *sdata,
1467 u16 stype,
1468 struct ieee80211_mgmt *mgmt,
1469 size_t len,
1470 struct ieee80211_rx_status *rx_status)
1471{
c6a1fa12 1472 struct ieee80211_local *local = sdata->local;
dbf498fb 1473 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
5d24828d 1474 struct ieee802_11_elems *elems;
472dbc45 1475 struct ieee80211_channel *channel;
472dbc45
JB		 1476 size_t baselen;
1477 int freq;
57fbcce3 1478 enum nl80211_band band = rx_status->band;
472dbc45
JB		 1479
1480 /* ignore ProbeResp to foreign address */
1481 if (stype == IEEE80211_STYPE_PROBE_RESP &&
b203ca39 1482 !ether_addr_equal(mgmt->da, sdata->vif.addr))
472dbc45
JB		 1483 return;
1484
1485 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1486 if (baselen > len)
1487 return;
1488
5d24828d
JB		 1489 elems = ieee802_11_parse_elems(mgmt->u.probe_resp.variable,
1490 len - baselen,
38c6aa29 1491 false, NULL);
5d24828d
JB		 1492 if (!elems)
1493 return;
472dbc45 1494
9a90bc81 1495 /* ignore non-mesh or secure / unsecure mismatch */
5d24828d
JB		 1496 if ((!elems->mesh_id || !elems->mesh_config) ||
1497 (elems->rsn && sdata->u.mesh.security == IEEE80211_MESH_SEC_NONE) ||
1498 (!elems->rsn && sdata->u.mesh.security != IEEE80211_MESH_SEC_NONE))
1499 goto free;
5cff5e01 1500
5d24828d
JB		 1501 if (elems->ds_params)
1502 freq = ieee80211_channel_to_frequency(elems->ds_params[0], band);
472dbc45
JB		 1503 else
1504 freq = rx_status->freq;
1505
1506 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1507
1508 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
5d24828d 1509 goto free;
472dbc45 1510
5d24828d 1511 if (mesh_matches_local(sdata, elems)) {
ed92a9b5
MH		 1512 mpl_dbg(sdata, "rssi_threshold=%d,rx_status->signal=%d\n",
1513 sdata->u.mesh.mshcfg.rssi_threshold, rx_status->signal);
1514 if (!sdata->u.mesh.user_mpm ||
1515 sdata->u.mesh.mshcfg.rssi_threshold == 0 ||
1516 sdata->u.mesh.mshcfg.rssi_threshold < rx_status->signal)
5d24828d 1517 mesh_neighbour_update(sdata, mgmt->sa, elems,
ecbc12ad 1518 rx_status);
93e2d04a
TCR		 1519
1520 if (ifmsh->csa_role != IEEE80211_MESH_CSA_ROLE_INIT &&
d0a9123e 1521 !sdata->vif.bss_conf.csa_active)
5d24828d 1522 ieee80211_mesh_process_chnswitch(sdata, elems, true);
ed92a9b5 1523 }
dbf498fb
JC		 1524
1525 if (ifmsh->sync_ops)
a5b983c6 1526 ifmsh->sync_ops->rx_bcn_presp(sdata, stype, mgmt, len,
5d24828d
JB		 1527 elems->mesh_config, rx_status);
1528free:
1529 kfree(elems);
472dbc45
JB		 1530}
1531
15ddba5f 1532int ieee80211_mesh_finish_csa(struct ieee80211_sub_if_data *sdata, u64 *changed)
b8456a14
CYY		 1533{
1534 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1535 struct mesh_csa_settings *tmp_csa_settings;
1536 int ret = 0;
1537
1538 /* Reset the TTL value and Initiator flag */
0cb4d4dc 1539 ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_NONE;
b8456a14
CYY		 1540 ifmsh->chsw_ttl = 0;
1541
1542 /* Remove the CSA and MCSP elements from the beacon */
6858ad75 1543 tmp_csa_settings = sdata_dereference(ifmsh->csa, sdata);
0c2bef46 1544 RCU_INIT_POINTER(ifmsh->csa, NULL);
66e01cf9
LC		 1545 if (tmp_csa_settings)
1546 kfree_rcu(tmp_csa_settings, rcu_head);
b8456a14
CYY		 1547 ret = ieee80211_mesh_rebuild_beacon(sdata);
1548 if (ret)
1549 return -EINVAL;
1550
15ddba5f 1551 *changed |= BSS_CHANGED_BEACON;
b8456a14
CYY		 1552
1553 mcsa_dbg(sdata, "complete switching to center freq %d MHz",
1554 sdata->vif.bss_conf.chandef.chan->center_freq);
15ddba5f 1555 return 0;
b8456a14
CYY		 1556}
1557
1558int ieee80211_mesh_csa_beacon(struct ieee80211_sub_if_data *sdata,
15ddba5f
A		 1559 struct cfg80211_csa_settings *csa_settings,
1560 u64 *changed)
b8456a14
CYY		 1561{
1562 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1563 struct mesh_csa_settings *tmp_csa_settings;
1564 int ret = 0;
1565
076fc877 1566 lockdep_assert_wiphy(sdata->local->hw.wiphy);
55184244 1567
b8456a14
CYY		 1568 tmp_csa_settings = kmalloc(sizeof(*tmp_csa_settings),
1569 GFP_ATOMIC);
1570 if (!tmp_csa_settings)
1571 return -ENOMEM;
1572
1573 memcpy(&tmp_csa_settings->settings, csa_settings,
1574 sizeof(struct cfg80211_csa_settings));
1575
1576 rcu_assign_pointer(ifmsh->csa, tmp_csa_settings);
1577
1578 ret = ieee80211_mesh_rebuild_beacon(sdata);
1579 if (ret) {
1580 tmp_csa_settings = rcu_dereference(ifmsh->csa);
0c2bef46 1581 RCU_INIT_POINTER(ifmsh->csa, NULL);
b8456a14
CYY		 1582 kfree_rcu(tmp_csa_settings, rcu_head);
1583 return ret;
1584 }
1585
15ddba5f
A		 1586 *changed |= BSS_CHANGED_BEACON;
1587 return 0;
b8456a14
CYY		 1588}
1589
8f2535b9 1590static int mesh_fwd_csa_frame(struct ieee80211_sub_if_data *sdata,
c4de37ee
PO		 1591 struct ieee80211_mgmt *mgmt, size_t len,
1592 struct ieee802_11_elems *elems)
8f2535b9
CYY		 1593{
1594 struct ieee80211_mgmt *mgmt_fwd;
1595 struct sk_buff *skb;
1596 struct ieee80211_local *local = sdata->local;
8f2535b9
CYY		 1597
1598 skb = dev_alloc_skb(local->tx_headroom + len);
1599 if (!skb)
1600 return -ENOMEM;
1601 skb_reserve(skb, local->tx_headroom);
4df864c1 1602 mgmt_fwd = skb_put(skb, len);
8f2535b9 1603
c4de37ee
PO		 1604 elems->mesh_chansw_params_ie->mesh_ttl--;
1605 elems->mesh_chansw_params_ie->mesh_flags &=
1606 ~WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
8f2535b9
CYY		 1607
1608 memcpy(mgmt_fwd, mgmt, len);
1609 eth_broadcast_addr(mgmt_fwd->da);
1610 memcpy(mgmt_fwd->sa, sdata->vif.addr, ETH_ALEN);
1611 memcpy(mgmt_fwd->bssid, sdata->vif.addr, ETH_ALEN);
1612
1613 ieee80211_tx_skb(sdata, skb);
1614 return 0;
1615}
1616
1617static void mesh_rx_csa_frame(struct ieee80211_sub_if_data *sdata,
1618 struct ieee80211_mgmt *mgmt, size_t len)
1619{
1620 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
5d24828d 1621 struct ieee802_11_elems *elems;
8f2535b9 1622 u16 pre_value;
33a45867 1623 bool fwd_csa = true;
8f2535b9 1624 size_t baselen;
3f718fd8 1625 u8 *pos;
8f2535b9
CYY		 1626
1627 if (mgmt->u.action.u.measurement.action_code !=
1628 WLAN_ACTION_SPCT_CHL_SWITCH)
1629 return;
1630
1631 pos = mgmt->u.action.u.chan_switch.variable;
1632 baselen = offsetof(struct ieee80211_mgmt,
1633 u.action.u.chan_switch.variable);
38c6aa29 1634 elems = ieee802_11_parse_elems(pos, len - baselen, true, NULL);
5d24828d 1635 if (!elems)
93e2d04a
TCR		 1636 return;
1637
5d24828d
JB		 1638 if (!mesh_matches_local(sdata, elems))
1639 goto free;
1640
1641 ifmsh->chsw_ttl = elems->mesh_chansw_params_ie->mesh_ttl;
3f718fd8 1642 if (!--ifmsh->chsw_ttl)
8f2535b9
CYY		 1643 fwd_csa = false;
1644
5d24828d 1645 pre_value = le16_to_cpu(elems->mesh_chansw_params_ie->mesh_pre_value);
8f2535b9 1646 if (ifmsh->pre_value >= pre_value)
5d24828d 1647 goto free;
8f2535b9
CYY		 1648
1649 ifmsh->pre_value = pre_value;
1650
d0a9123e 1651 if (!sdata->vif.bss_conf.csa_active &&
5d24828d 1652 !ieee80211_mesh_process_chnswitch(sdata, elems, false)) {
33a45867 1653 mcsa_dbg(sdata, "Failed to process CSA action frame");
5d24828d 1654 goto free;
33a45867
CYY		 1655 }
1656
8f2535b9
CYY		 1657 /* forward or re-broadcast the CSA frame */
1658 if (fwd_csa) {
5d24828d 1659 if (mesh_fwd_csa_frame(sdata, mgmt, len, elems) < 0)
8f2535b9
CYY		 1660 mcsa_dbg(sdata, "Failed to forward the CSA frame");
1661 }
5d24828d
JB		 1662free:
1663 kfree(elems);
8f2535b9
CYY		 1664}
1665
472dbc45
JB		 1666static void ieee80211_mesh_rx_mgmt_action(struct ieee80211_sub_if_data *sdata,
1667 struct ieee80211_mgmt *mgmt,
1668 size_t len,
1669 struct ieee80211_rx_status *rx_status)
1670{
1671 switch (mgmt->u.action.category) {
8db09850
TP		 1672 case WLAN_CATEGORY_SELF_PROTECTED:
1673 switch (mgmt->u.action.u.self_prot.action_code) {
1674 case WLAN_SP_MESH_PEERING_OPEN:
1675 case WLAN_SP_MESH_PEERING_CLOSE:
1676 case WLAN_SP_MESH_PEERING_CONFIRM:
1677 mesh_rx_plink_frame(sdata, mgmt, len, rx_status);
1678 break;
1679 }
472dbc45 1680 break;
25d49e4d
TP		 1681 case WLAN_CATEGORY_MESH_ACTION:
1682 if (mesh_action_is_path_sel(mgmt))
1683 mesh_rx_path_sel_frame(sdata, mgmt, len);
472dbc45 1684 break;
8f2535b9
CYY		 1685 case WLAN_CATEGORY_SPECTRUM_MGMT:
1686 mesh_rx_csa_frame(sdata, mgmt, len);
1687 break;
472dbc45
JB		 1688 }
1689}
1690
1fa57d01
JB		 1691void ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1692 struct sk_buff *skb)
472dbc45
JB		 1693{
1694 struct ieee80211_rx_status *rx_status;
472dbc45
JB		 1695 struct ieee80211_mgmt *mgmt;
1696 u16 stype;
1697
076fc877 1698 lockdep_assert_wiphy(sdata->local->hw.wiphy);
ecccd072
TP		 1699
1700 /* mesh already went down */
1693d344 1701 if (!sdata->u.mesh.mesh_id_len)
076fc877 1702 return;
ecccd072 1703
f1d58c25 1704 rx_status = IEEE80211_SKB_RXCB(skb);
472dbc45
JB		 1705 mgmt = (struct ieee80211_mgmt *) skb->data;
1706 stype = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE;
1707
1708 switch (stype) {
1709 case IEEE80211_STYPE_PROBE_RESP:
1710 case IEEE80211_STYPE_BEACON:
1711 ieee80211_mesh_rx_bcn_presp(sdata, stype, mgmt, skb->len,
1712 rx_status);
1713 break;
9fb04b50
TP		 1714 case IEEE80211_STYPE_PROBE_REQ:
1715 ieee80211_mesh_rx_probe_req(sdata, mgmt, skb->len);
1716 break;
472dbc45
JB		 1717 case IEEE80211_STYPE_ACTION:
1718 ieee80211_mesh_rx_mgmt_action(sdata, mgmt, skb->len, rx_status);
1719 break;
1720 }
472dbc45
JB		 1721}
1722
f81a9ded
TP		 1723static void mesh_bss_info_changed(struct ieee80211_sub_if_data *sdata)
1724{
1725 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
15ddba5f
A		 1726 u32 bit;
1727 u64 changed = 0;
f81a9ded 1728
6e48ebff 1729 for_each_set_bit(bit, ifmsh->mbss_changed,
f81a9ded 1730 sizeof(changed) * BITS_PER_BYTE) {
6e48ebff 1731 clear_bit(bit, ifmsh->mbss_changed);
f81a9ded
TP		 1732 changed |= BIT(bit);
1733 }
1734
1735 if (sdata->vif.bss_conf.enable_beacon &&
1736 (changed & (BSS_CHANGED_BEACON |
1737 BSS_CHANGED_HT |
1738 BSS_CHANGED_BASIC_RATES |
1739 BSS_CHANGED_BEACON_INT)))
1740 if (ieee80211_mesh_rebuild_beacon(sdata))
1741 return;
1742
d8675a63 1743 ieee80211_link_info_change_notify(sdata, &sdata->deflink, changed);
f81a9ded
TP		 1744}
1745
1fa57d01 1746void ieee80211_mesh_work(struct ieee80211_sub_if_data *sdata)
472dbc45 1747{
472dbc45 1748 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
472dbc45 1749
076fc877 1750 lockdep_assert_wiphy(sdata->local->hw.wiphy);
ecccd072
TP		 1751
1752 /* mesh already went down */
1693d344 1753 if (!sdata->u.mesh.mesh_id_len)
076fc877 1754 return;
ecccd072 1755
472dbc45
JB		 1756 if (ifmsh->preq_queue_len &&
1757 time_after(jiffies,
1758 ifmsh->last_preq + msecs_to_jiffies(ifmsh->mshcfg.dot11MeshHWMPpreqMinInterval)))
1759 mesh_path_start_discovery(sdata);
1760
18889231 1761 if (test_and_clear_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags))
bf7cd94d 1762 ieee80211_mesh_housekeeping(sdata);
e304bfd3
RP		 1763
1764 if (test_and_clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags))
1765 ieee80211_mesh_rootpath(sdata);
dbf498fb
JC		 1766
1767 if (test_and_clear_bit(MESH_WORK_DRIFT_ADJUST, &ifmsh->wrkq_flags))
445cd452 1768 mesh_sync_adjust_tsf(sdata);
ecccd072 1769
f81a9ded
TP		 1770 if (test_and_clear_bit(MESH_WORK_MBSS_CHANGED, &ifmsh->wrkq_flags))
1771 mesh_bss_info_changed(sdata);
472dbc45
JB		 1772}
1773
472dbc45 1774
902acc78
JB		 1775void ieee80211_mesh_init_sdata(struct ieee80211_sub_if_data *sdata)
1776{
472dbc45 1777 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
ad2d223a 1778 static u8 zero_addr[ETH_ALEN] = {};
472dbc45 1779
34f11cd3
KC		 1780 timer_setup(&ifmsh->housekeeping_timer,
1781 ieee80211_mesh_housekeeping_timer, 0);
472dbc45 1782
472dbc45 1783 ifmsh->accepting_plinks = true;
472dbc45 1784 atomic_set(&ifmsh->mpaths, 0);
f698d856 1785 mesh_rmc_init(sdata);
472dbc45 1786 ifmsh->last_preq = jiffies;
dca7e943 1787 ifmsh->next_perr = jiffies;
0cb4d4dc 1788 ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_NONE;
902acc78
JB		 1789 /* Allocate all mesh structures when creating the first mesh interface. */
1790 if (!mesh_allocated)
1791 ieee80211s_init();
2bdaf386
BC		 1792
1793 mesh_pathtbl_init(sdata);
1794
34f11cd3
KC		 1795 timer_setup(&ifmsh->mesh_path_timer, ieee80211_mesh_path_timer, 0);
1796 timer_setup(&ifmsh->mesh_path_root_timer,
1797 ieee80211_mesh_path_root_timer, 0);
472dbc45 1798 INIT_LIST_HEAD(&ifmsh->preq_queue.list);
3f52b7e3 1799 skb_queue_head_init(&ifmsh->ps.bc_buf);
472dbc45 1800 spin_lock_init(&ifmsh->mesh_preq_queue_lock);
dbf498fb 1801 spin_lock_init(&ifmsh->sync_offset_lock);
2b5e1967 1802 RCU_INIT_POINTER(ifmsh->beacon, NULL);
ad2d223a
JB		 1803
1804 sdata->vif.bss_conf.bssid = zero_addr;
472dbc45 1805}
0371a08f
BC		 1806
1807void ieee80211_mesh_teardown_sdata(struct ieee80211_sub_if_data *sdata)
1808{
1809 mesh_rmc_free(sdata);
1810 mesh_pathtbl_unregister(sdata);
1811}
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