Commit | Line | Data |
---|---|---|
2e3c8736 | 1 | /* |
264d9b7d | 2 | * Copyright (c) 2008, 2009 open80211s Ltd. |
7eb26df2 | 3 | * Copyright (C) 2018 Intel Corporation |
2e3c8736 LCC |
4 | * Authors: Luis Carlos Cobo <luisca@cozybit.com> |
5 | * Javier Cardona <javier@cozybit.com> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | */ | |
11 | ||
5a0e3ad6 | 12 | #include <linux/slab.h> |
51ceddad | 13 | #include <asm/unaligned.h> |
2e3c8736 LCC |
14 | #include "ieee80211_i.h" |
15 | #include "mesh.h" | |
b8456a14 | 16 | #include "driver-ops.h" |
2e3c8736 | 17 | |
bf7cd94d | 18 | static int mesh_allocated; |
2e3c8736 LCC |
19 | static struct kmem_cache *rm_cache; |
20 | ||
25d49e4d TP |
21 | bool mesh_action_is_path_sel(struct ieee80211_mgmt *mgmt) |
22 | { | |
23 | return (mgmt->u.action.u.mesh_action.action_code == | |
24 | WLAN_MESH_ACTION_HWMP_PATH_SELECTION); | |
25 | } | |
25d49e4d | 26 | |
2e3c8736 LCC |
27 | void ieee80211s_init(void) |
28 | { | |
2e3c8736 LCC |
29 | mesh_allocated = 1; |
30 | rm_cache = kmem_cache_create("mesh_rmc", sizeof(struct rmc_entry), | |
31 | 0, 0, NULL); | |
32 | } | |
33 | ||
34 | void ieee80211s_stop(void) | |
35 | { | |
bf7cd94d JB |
36 | if (!mesh_allocated) |
37 | return; | |
2e3c8736 LCC |
38 | kmem_cache_destroy(rm_cache); |
39 | } | |
40 | ||
34f11cd3 | 41 | static void ieee80211_mesh_housekeeping_timer(struct timer_list *t) |
472dbc45 | 42 | { |
34f11cd3 KC |
43 | struct ieee80211_sub_if_data *sdata = |
44 | from_timer(sdata, t, u.mesh.housekeeping_timer); | |
472dbc45 JB |
45 | struct ieee80211_local *local = sdata->local; |
46 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
47 | ||
6b9ac442 | 48 | set_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags); |
5bb644a0 | 49 | |
64592c8f | 50 | ieee80211_queue_work(&local->hw, &sdata->work); |
472dbc45 JB |
51 | } |
52 | ||
2e3c8736 LCC |
53 | /** |
54 | * mesh_matches_local - check if the config of a mesh point matches ours | |
55 | * | |
f698d856 | 56 | * @sdata: local mesh subif |
f743ff49 | 57 | * @ie: information elements of a management frame from the mesh peer |
2e3c8736 LCC |
58 | * |
59 | * This function checks if the mesh configuration of a mesh point matches the | |
60 | * local mesh configuration, i.e. if both nodes belong to the same mesh network. | |
61 | */ | |
f743ff49 TP |
62 | bool 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; |
2e3c8736 | 69 | |
2e3c8736 LCC |
70 | /* |
71 | * As support for each feature is added, check for matching | |
72 | * - On mesh config capabilities | |
73 | * - Power Save Support En | |
74 | * - Sync support enabled | |
75 | * - Sync support active | |
76 | * - Sync support required from peer | |
77 | * - MDA enabled | |
78 | * - Power management control on fc | |
79 | */ | |
739522ba TP |
80 | if (!(ifmsh->mesh_id_len == ie->mesh_id_len && |
81 | memcmp(ifmsh->mesh_id, ie->mesh_id, ie->mesh_id_len) == 0 && | |
82 | (ifmsh->mesh_pp_id == ie->mesh_config->meshconf_psel) && | |
83 | (ifmsh->mesh_pm_id == ie->mesh_config->meshconf_pmetric) && | |
84 | (ifmsh->mesh_cc_id == ie->mesh_config->meshconf_congest) && | |
85 | (ifmsh->mesh_sp_id == ie->mesh_config->meshconf_synch) && | |
86 | (ifmsh->mesh_auth_id == ie->mesh_config->meshconf_auth))) | |
bf7cd94d | 87 | return false; |
739522ba | 88 | |
21a8e9dd MSS |
89 | sband = ieee80211_get_sband(sdata); |
90 | if (!sband) | |
91 | return false; | |
92 | ||
93 | ieee80211_sta_get_rates(sdata, ie, sband->band, | |
f743ff49 TP |
94 | &basic_rates); |
95 | ||
fe40cb62 | 96 | if (sdata->vif.bss_conf.basic_rates != basic_rates) |
bf7cd94d | 97 | return false; |
fe40cb62 | 98 | |
8ac3c704 JB |
99 | cfg80211_chandef_create(&sta_chan_def, sdata->vif.bss_conf.chandef.chan, |
100 | NL80211_CHAN_NO_HT); | |
101 | ieee80211_chandef_ht_oper(ie->ht_operation, &sta_chan_def); | |
7eb26df2 JB |
102 | ieee80211_chandef_vht_oper(&sdata->local->hw, |
103 | ie->vht_operation, ie->ht_operation, | |
104 | &sta_chan_def); | |
c85fb53c | 105 | |
4bf88530 JB |
106 | if (!cfg80211_chandef_compatible(&sdata->vif.bss_conf.chandef, |
107 | &sta_chan_def)) | |
bf7cd94d | 108 | return false; |
2e3c8736 | 109 | |
739522ba | 110 | return true; |
2e3c8736 LCC |
111 | } |
112 | ||
113 | /** | |
114 | * mesh_peer_accepts_plinks - check if an mp is willing to establish peer links | |
115 | * | |
116 | * @ie: information elements of a management frame from the mesh peer | |
2e3c8736 | 117 | */ |
f698d856 | 118 | bool mesh_peer_accepts_plinks(struct ieee802_11_elems *ie) |
2e3c8736 | 119 | { |
136cfa28 | 120 | return (ie->mesh_config->meshconf_cap & |
bf7cd94d | 121 | IEEE80211_MESHCONF_CAPAB_ACCEPT_PLINKS) != 0; |
2e3c8736 LCC |
122 | } |
123 | ||
124 | /** | |
2c53040f | 125 | * mesh_accept_plinks_update - update accepting_plink in local mesh beacons |
2e3c8736 | 126 | * |
d0709a65 | 127 | * @sdata: mesh interface in which mesh beacons are going to be updated |
df323818 MP |
128 | * |
129 | * Returns: beacon changed flag if the beacon content changed. | |
2e3c8736 | 130 | */ |
df323818 | 131 | u32 mesh_accept_plinks_update(struct ieee80211_sub_if_data *sdata) |
2e3c8736 | 132 | { |
2e3c8736 | 133 | bool free_plinks; |
df323818 | 134 | u32 changed = 0; |
2e3c8736 LCC |
135 | |
136 | /* In case mesh_plink_free_count > 0 and mesh_plinktbl_capacity == 0, | |
137 | * the mesh interface might be able to establish plinks with peers that | |
b4e08ea1 LCC |
138 | * are already on the table but are not on PLINK_ESTAB state. However, |
139 | * in general the mesh interface is not accepting peer link requests | |
140 | * from new peers, and that must be reflected in the beacon | |
2e3c8736 LCC |
141 | */ |
142 | free_plinks = mesh_plink_availables(sdata); | |
143 | ||
df323818 MP |
144 | if (free_plinks != sdata->u.mesh.accepting_plinks) { |
145 | sdata->u.mesh.accepting_plinks = free_plinks; | |
146 | changed = BSS_CHANGED_BEACON; | |
147 | } | |
148 | ||
149 | return changed; | |
2e3c8736 LCC |
150 | } |
151 | ||
45b5028e TP |
152 | /* |
153 | * mesh_sta_cleanup - clean up any mesh sta state | |
154 | * | |
155 | * @sta: mesh sta to clean up. | |
156 | */ | |
157 | void mesh_sta_cleanup(struct sta_info *sta) | |
158 | { | |
159 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
efc401f4 | 160 | u32 changed = mesh_plink_deactivate(sta); |
fe7a7c57 | 161 | |
f81a9ded | 162 | if (changed) |
2b5e1967 | 163 | ieee80211_mbss_info_change_notify(sdata, changed); |
45b5028e TP |
164 | } |
165 | ||
f698d856 | 166 | int mesh_rmc_init(struct ieee80211_sub_if_data *sdata) |
2e3c8736 | 167 | { |
2e3c8736 LCC |
168 | int i; |
169 | ||
472dbc45 JB |
170 | sdata->u.mesh.rmc = kmalloc(sizeof(struct mesh_rmc), GFP_KERNEL); |
171 | if (!sdata->u.mesh.rmc) | |
2e3c8736 | 172 | return -ENOMEM; |
472dbc45 | 173 | sdata->u.mesh.rmc->idx_mask = RMC_BUCKETS - 1; |
2e3c8736 | 174 | for (i = 0; i < RMC_BUCKETS; i++) |
47a0489c | 175 | INIT_HLIST_HEAD(&sdata->u.mesh.rmc->bucket[i]); |
2e3c8736 LCC |
176 | return 0; |
177 | } | |
178 | ||
f698d856 | 179 | void mesh_rmc_free(struct ieee80211_sub_if_data *sdata) |
2e3c8736 | 180 | { |
472dbc45 | 181 | struct mesh_rmc *rmc = sdata->u.mesh.rmc; |
47a0489c BC |
182 | struct rmc_entry *p; |
183 | struct hlist_node *n; | |
2e3c8736 LCC |
184 | int i; |
185 | ||
472dbc45 | 186 | if (!sdata->u.mesh.rmc) |
2e3c8736 LCC |
187 | return; |
188 | ||
bf7cd94d | 189 | for (i = 0; i < RMC_BUCKETS; i++) { |
47a0489c BC |
190 | hlist_for_each_entry_safe(p, n, &rmc->bucket[i], list) { |
191 | hlist_del(&p->list); | |
2e3c8736 LCC |
192 | kmem_cache_free(rm_cache, p); |
193 | } | |
bf7cd94d | 194 | } |
2e3c8736 LCC |
195 | |
196 | kfree(rmc); | |
472dbc45 | 197 | sdata->u.mesh.rmc = NULL; |
2e3c8736 LCC |
198 | } |
199 | ||
200 | /** | |
201 | * mesh_rmc_check - Check frame in recent multicast cache and add if absent. | |
202 | * | |
bf7cd94d | 203 | * @sdata: interface |
2e3c8736 LCC |
204 | * @sa: source address |
205 | * @mesh_hdr: mesh_header | |
206 | * | |
207 | * Returns: 0 if the frame is not in the cache, nonzero otherwise. | |
208 | * | |
209 | * Checks using the source address and the mesh sequence number if we have | |
210 | * received this frame lately. If the frame is not in the cache, it is added to | |
211 | * it. | |
212 | */ | |
bf7cd94d JB |
213 | int mesh_rmc_check(struct ieee80211_sub_if_data *sdata, |
214 | const u8 *sa, struct ieee80211s_hdr *mesh_hdr) | |
2e3c8736 | 215 | { |
472dbc45 | 216 | struct mesh_rmc *rmc = sdata->u.mesh.rmc; |
2e3c8736 LCC |
217 | u32 seqnum = 0; |
218 | int entries = 0; | |
219 | u8 idx; | |
47a0489c BC |
220 | struct rmc_entry *p; |
221 | struct hlist_node *n; | |
2e3c8736 | 222 | |
0aa7fabb BC |
223 | if (!rmc) |
224 | return -1; | |
225 | ||
2e3c8736 | 226 | /* Don't care about endianness since only match matters */ |
51ceddad LCC |
227 | memcpy(&seqnum, &mesh_hdr->seqnum, sizeof(mesh_hdr->seqnum)); |
228 | idx = le32_to_cpu(mesh_hdr->seqnum) & rmc->idx_mask; | |
47a0489c | 229 | hlist_for_each_entry_safe(p, n, &rmc->bucket[idx], list) { |
2e3c8736 LCC |
230 | ++entries; |
231 | if (time_after(jiffies, p->exp_time) || | |
bf7cd94d | 232 | entries == RMC_QUEUE_MAX_LEN) { |
47a0489c | 233 | hlist_del(&p->list); |
2e3c8736 LCC |
234 | kmem_cache_free(rm_cache, p); |
235 | --entries; | |
bf7cd94d | 236 | } else if ((seqnum == p->seqnum) && ether_addr_equal(sa, p->sa)) |
2e3c8736 LCC |
237 | return -1; |
238 | } | |
239 | ||
240 | p = kmem_cache_alloc(rm_cache, GFP_ATOMIC); | |
d15b8459 | 241 | if (!p) |
2e3c8736 | 242 | return 0; |
d15b8459 | 243 | |
2e3c8736 LCC |
244 | p->seqnum = seqnum; |
245 | p->exp_time = jiffies + RMC_TIMEOUT; | |
246 | memcpy(p->sa, sa, ETH_ALEN); | |
47a0489c | 247 | hlist_add_head(&p->list, &rmc->bucket[idx]); |
2e3c8736 LCC |
248 | return 0; |
249 | } | |
250 | ||
bf7cd94d JB |
251 | int mesh_add_meshconf_ie(struct ieee80211_sub_if_data *sdata, |
252 | struct sk_buff *skb) | |
082ebb0c TP |
253 | { |
254 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
255 | u8 *pos, neighbors; | |
256 | u8 meshconf_len = sizeof(struct ieee80211_meshconf_ie); | |
257 | ||
258 | if (skb_tailroom(skb) < 2 + meshconf_len) | |
259 | return -ENOMEM; | |
260 | ||
261 | pos = skb_put(skb, 2 + meshconf_len); | |
262 | *pos++ = WLAN_EID_MESH_CONFIG; | |
263 | *pos++ = meshconf_len; | |
264 | ||
43552be1 TP |
265 | /* save a pointer for quick updates in pre-tbtt */ |
266 | ifmsh->meshconf_offset = pos - skb->data; | |
267 | ||
082ebb0c TP |
268 | /* Active path selection protocol ID */ |
269 | *pos++ = ifmsh->mesh_pp_id; | |
270 | /* Active path selection metric ID */ | |
271 | *pos++ = ifmsh->mesh_pm_id; | |
272 | /* Congestion control mode identifier */ | |
273 | *pos++ = ifmsh->mesh_cc_id; | |
274 | /* Synchronization protocol identifier */ | |
275 | *pos++ = ifmsh->mesh_sp_id; | |
276 | /* Authentication Protocol identifier */ | |
277 | *pos++ = ifmsh->mesh_auth_id; | |
278 | /* Mesh Formation Info - number of neighbors */ | |
1258d976 | 279 | neighbors = atomic_read(&ifmsh->estab_plinks); |
e05ecccd | 280 | neighbors = min_t(int, neighbors, IEEE80211_MAX_MESH_PEERINGS); |
082ebb0c TP |
281 | *pos++ = neighbors << 1; |
282 | /* Mesh capability */ | |
b60e527a CYY |
283 | *pos = 0x00; |
284 | *pos |= ifmsh->mshcfg.dot11MeshForwarding ? | |
285 | IEEE80211_MESHCONF_CAPAB_FORWARDING : 0x00; | |
dbf498fb | 286 | *pos |= ifmsh->accepting_plinks ? |
bf7cd94d | 287 | IEEE80211_MESHCONF_CAPAB_ACCEPT_PLINKS : 0x00; |
3f52b7e3 MP |
288 | /* Mesh PS mode. See IEEE802.11-2012 8.4.2.100.8 */ |
289 | *pos |= ifmsh->ps_peers_deep_sleep ? | |
bf7cd94d | 290 | IEEE80211_MESHCONF_CAPAB_POWER_SAVE_LEVEL : 0x00; |
082ebb0c TP |
291 | return 0; |
292 | } | |
293 | ||
bf7cd94d | 294 | int mesh_add_meshid_ie(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb) |
082ebb0c TP |
295 | { |
296 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
297 | u8 *pos; | |
298 | ||
299 | if (skb_tailroom(skb) < 2 + ifmsh->mesh_id_len) | |
300 | return -ENOMEM; | |
301 | ||
302 | pos = skb_put(skb, 2 + ifmsh->mesh_id_len); | |
303 | *pos++ = WLAN_EID_MESH_ID; | |
304 | *pos++ = ifmsh->mesh_id_len; | |
305 | if (ifmsh->mesh_id_len) | |
306 | memcpy(pos, ifmsh->mesh_id, ifmsh->mesh_id_len); | |
307 | ||
308 | return 0; | |
309 | } | |
310 | ||
bf7cd94d JB |
311 | static int mesh_add_awake_window_ie(struct ieee80211_sub_if_data *sdata, |
312 | struct sk_buff *skb) | |
3f52b7e3 MP |
313 | { |
314 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
315 | u8 *pos; | |
316 | ||
317 | /* see IEEE802.11-2012 13.14.6 */ | |
318 | if (ifmsh->ps_peers_light_sleep == 0 && | |
319 | ifmsh->ps_peers_deep_sleep == 0 && | |
320 | ifmsh->nonpeer_pm == NL80211_MESH_POWER_ACTIVE) | |
321 | return 0; | |
322 | ||
323 | if (skb_tailroom(skb) < 4) | |
324 | return -ENOMEM; | |
325 | ||
326 | pos = skb_put(skb, 2 + 2); | |
327 | *pos++ = WLAN_EID_MESH_AWAKE_WINDOW; | |
328 | *pos++ = 2; | |
329 | put_unaligned_le16(ifmsh->mshcfg.dot11MeshAwakeWindowDuration, pos); | |
330 | ||
331 | return 0; | |
332 | } | |
333 | ||
bf7cd94d JB |
334 | int mesh_add_vendor_ies(struct ieee80211_sub_if_data *sdata, |
335 | struct sk_buff *skb) | |
082ebb0c TP |
336 | { |
337 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
338 | u8 offset, len; | |
339 | const u8 *data; | |
340 | ||
341 | if (!ifmsh->ie || !ifmsh->ie_len) | |
342 | return 0; | |
343 | ||
344 | /* fast-forward to vendor IEs */ | |
345 | offset = ieee80211_ie_split_vendor(ifmsh->ie, ifmsh->ie_len, 0); | |
346 | ||
da7061c8 | 347 | if (offset < ifmsh->ie_len) { |
082ebb0c TP |
348 | len = ifmsh->ie_len - offset; |
349 | data = ifmsh->ie + offset; | |
350 | if (skb_tailroom(skb) < len) | |
351 | return -ENOMEM; | |
59ae1d12 | 352 | skb_put_data(skb, data, len); |
082ebb0c TP |
353 | } |
354 | ||
355 | return 0; | |
356 | } | |
357 | ||
bf7cd94d | 358 | int mesh_add_rsn_ie(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb) |
082ebb0c TP |
359 | { |
360 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
361 | u8 len = 0; | |
362 | const u8 *data; | |
363 | ||
364 | if (!ifmsh->ie || !ifmsh->ie_len) | |
365 | return 0; | |
366 | ||
367 | /* find RSN IE */ | |
a40a8c17 BC |
368 | data = cfg80211_find_ie(WLAN_EID_RSN, ifmsh->ie, ifmsh->ie_len); |
369 | if (!data) | |
370 | return 0; | |
082ebb0c | 371 | |
a40a8c17 BC |
372 | len = data[1] + 2; |
373 | ||
374 | if (skb_tailroom(skb) < len) | |
375 | return -ENOMEM; | |
59ae1d12 | 376 | skb_put_data(skb, data, len); |
082ebb0c TP |
377 | |
378 | return 0; | |
379 | } | |
380 | ||
bf7cd94d JB |
381 | static int mesh_add_ds_params_ie(struct ieee80211_sub_if_data *sdata, |
382 | struct sk_buff *skb) | |
082ebb0c | 383 | { |
55de908a JB |
384 | struct ieee80211_chanctx_conf *chanctx_conf; |
385 | struct ieee80211_channel *chan; | |
082ebb0c | 386 | u8 *pos; |
2e3c8736 | 387 | |
082ebb0c TP |
388 | if (skb_tailroom(skb) < 3) |
389 | return -ENOMEM; | |
390 | ||
55de908a JB |
391 | rcu_read_lock(); |
392 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
393 | if (WARN_ON(!chanctx_conf)) { | |
394 | rcu_read_unlock(); | |
395 | return -EINVAL; | |
396 | } | |
4bf88530 | 397 | chan = chanctx_conf->def.chan; |
55de908a JB |
398 | rcu_read_unlock(); |
399 | ||
601513aa ET |
400 | pos = skb_put(skb, 2 + 1); |
401 | *pos++ = WLAN_EID_DS_PARAMS; | |
402 | *pos++ = 1; | |
403 | *pos++ = ieee80211_frequency_to_channel(chan->center_freq); | |
be125c60 | 404 | |
082ebb0c | 405 | return 0; |
2e3c8736 LCC |
406 | } |
407 | ||
bf7cd94d JB |
408 | int mesh_add_ht_cap_ie(struct ieee80211_sub_if_data *sdata, |
409 | struct sk_buff *skb) | |
176f3608 | 410 | { |
176f3608 TP |
411 | struct ieee80211_supported_band *sband; |
412 | u8 *pos; | |
413 | ||
21a8e9dd MSS |
414 | sband = ieee80211_get_sband(sdata); |
415 | if (!sband) | |
416 | return -EINVAL; | |
417 | ||
176f3608 | 418 | if (!sband->ht_cap.ht_supported || |
0418a445 SW |
419 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT || |
420 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 || | |
421 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10) | |
176f3608 TP |
422 | return 0; |
423 | ||
424 | if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_ht_cap)) | |
425 | return -ENOMEM; | |
426 | ||
427 | pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_cap)); | |
ef96a842 | 428 | ieee80211_ie_build_ht_cap(pos, &sband->ht_cap, sband->ht_cap.cap); |
176f3608 TP |
429 | |
430 | return 0; | |
431 | } | |
432 | ||
bf7cd94d JB |
433 | int mesh_add_ht_oper_ie(struct ieee80211_sub_if_data *sdata, |
434 | struct sk_buff *skb) | |
176f3608 TP |
435 | { |
436 | struct ieee80211_local *local = sdata->local; | |
55de908a JB |
437 | struct ieee80211_chanctx_conf *chanctx_conf; |
438 | struct ieee80211_channel *channel; | |
55de908a JB |
439 | struct ieee80211_supported_band *sband; |
440 | struct ieee80211_sta_ht_cap *ht_cap; | |
176f3608 TP |
441 | u8 *pos; |
442 | ||
55de908a JB |
443 | rcu_read_lock(); |
444 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
445 | if (WARN_ON(!chanctx_conf)) { | |
446 | rcu_read_unlock(); | |
447 | return -EINVAL; | |
448 | } | |
4bf88530 | 449 | channel = chanctx_conf->def.chan; |
55de908a JB |
450 | rcu_read_unlock(); |
451 | ||
452 | sband = local->hw.wiphy->bands[channel->band]; | |
453 | ht_cap = &sband->ht_cap; | |
454 | ||
c85fb53c BC |
455 | if (!ht_cap->ht_supported || |
456 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT || | |
457 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 || | |
458 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10) | |
176f3608 TP |
459 | return 0; |
460 | ||
074d46d1 | 461 | if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_ht_operation)) |
176f3608 TP |
462 | return -ENOMEM; |
463 | ||
074d46d1 | 464 | pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_operation)); |
4bf88530 | 465 | ieee80211_ie_build_ht_oper(pos, ht_cap, &sdata->vif.bss_conf.chandef, |
57f255f5 AN |
466 | sdata->vif.bss_conf.ht_operation_mode, |
467 | false); | |
176f3608 TP |
468 | |
469 | return 0; | |
470 | } | |
bf7cd94d | 471 | |
c85fb53c BC |
472 | int mesh_add_vht_cap_ie(struct ieee80211_sub_if_data *sdata, |
473 | struct sk_buff *skb) | |
474 | { | |
c85fb53c BC |
475 | struct ieee80211_supported_band *sband; |
476 | u8 *pos; | |
477 | ||
21a8e9dd MSS |
478 | sband = ieee80211_get_sband(sdata); |
479 | if (!sband) | |
480 | return -EINVAL; | |
481 | ||
c85fb53c BC |
482 | if (!sband->vht_cap.vht_supported || |
483 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT || | |
484 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 || | |
485 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10) | |
486 | return 0; | |
487 | ||
488 | if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_vht_cap)) | |
489 | return -ENOMEM; | |
490 | ||
491 | pos = skb_put(skb, 2 + sizeof(struct ieee80211_vht_cap)); | |
492 | ieee80211_ie_build_vht_cap(pos, &sband->vht_cap, sband->vht_cap.cap); | |
493 | ||
494 | return 0; | |
495 | } | |
496 | ||
497 | int mesh_add_vht_oper_ie(struct ieee80211_sub_if_data *sdata, | |
498 | struct sk_buff *skb) | |
499 | { | |
500 | struct ieee80211_local *local = sdata->local; | |
501 | struct ieee80211_chanctx_conf *chanctx_conf; | |
502 | struct ieee80211_channel *channel; | |
503 | struct ieee80211_supported_band *sband; | |
504 | struct ieee80211_sta_vht_cap *vht_cap; | |
505 | u8 *pos; | |
506 | ||
507 | rcu_read_lock(); | |
508 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
509 | if (WARN_ON(!chanctx_conf)) { | |
510 | rcu_read_unlock(); | |
511 | return -EINVAL; | |
512 | } | |
513 | channel = chanctx_conf->def.chan; | |
514 | rcu_read_unlock(); | |
515 | ||
516 | sband = local->hw.wiphy->bands[channel->band]; | |
517 | vht_cap = &sband->vht_cap; | |
518 | ||
519 | if (!vht_cap->vht_supported || | |
520 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT || | |
521 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 || | |
522 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10) | |
523 | return 0; | |
524 | ||
525 | if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_vht_operation)) | |
526 | return -ENOMEM; | |
527 | ||
528 | pos = skb_put(skb, 2 + sizeof(struct ieee80211_vht_operation)); | |
529 | ieee80211_ie_build_vht_oper(pos, vht_cap, | |
530 | &sdata->vif.bss_conf.chandef); | |
531 | ||
532 | return 0; | |
533 | } | |
534 | ||
34f11cd3 | 535 | static void ieee80211_mesh_path_timer(struct timer_list *t) |
2e3c8736 LCC |
536 | { |
537 | struct ieee80211_sub_if_data *sdata = | |
34f11cd3 | 538 | from_timer(sdata, t, u.mesh.mesh_path_timer); |
5bb644a0 | 539 | |
690205f1 | 540 | ieee80211_queue_work(&sdata->local->hw, &sdata->work); |
2e3c8736 LCC |
541 | } |
542 | ||
34f11cd3 | 543 | static void ieee80211_mesh_path_root_timer(struct timer_list *t) |
e304bfd3 RP |
544 | { |
545 | struct ieee80211_sub_if_data *sdata = | |
34f11cd3 | 546 | from_timer(sdata, t, u.mesh.mesh_path_root_timer); |
e304bfd3 | 547 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
e304bfd3 RP |
548 | |
549 | set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); | |
550 | ||
690205f1 | 551 | ieee80211_queue_work(&sdata->local->hw, &sdata->work); |
e304bfd3 RP |
552 | } |
553 | ||
63c5723b RP |
554 | void ieee80211_mesh_root_setup(struct ieee80211_if_mesh *ifmsh) |
555 | { | |
dbb912cd | 556 | if (ifmsh->mshcfg.dot11MeshHWMPRootMode > IEEE80211_ROOTMODE_ROOT) |
63c5723b RP |
557 | set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); |
558 | else { | |
559 | clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); | |
560 | /* stop running timer */ | |
561 | del_timer_sync(&ifmsh->mesh_path_root_timer); | |
562 | } | |
563 | } | |
564 | ||
3c5772a5 JC |
565 | /** |
566 | * ieee80211_fill_mesh_addresses - fill addresses of a locally originated mesh frame | |
bf7cd94d | 567 | * @hdr: 802.11 frame header |
3c5772a5 JC |
568 | * @fc: frame control field |
569 | * @meshda: destination address in the mesh | |
570 | * @meshsa: source address address in the mesh. Same as TA, as frame is | |
571 | * locally originated. | |
572 | * | |
573 | * Return the length of the 802.11 (does not include a mesh control header) | |
574 | */ | |
15ff6365 JB |
575 | int ieee80211_fill_mesh_addresses(struct ieee80211_hdr *hdr, __le16 *fc, |
576 | const u8 *meshda, const u8 *meshsa) | |
577 | { | |
3c5772a5 JC |
578 | if (is_multicast_ether_addr(meshda)) { |
579 | *fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS); | |
580 | /* DA TA SA */ | |
581 | memcpy(hdr->addr1, meshda, ETH_ALEN); | |
582 | memcpy(hdr->addr2, meshsa, ETH_ALEN); | |
583 | memcpy(hdr->addr3, meshsa, ETH_ALEN); | |
584 | return 24; | |
585 | } else { | |
2154c81c | 586 | *fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); |
3c5772a5 | 587 | /* RA TA DA SA */ |
c84a67a2 | 588 | eth_zero_addr(hdr->addr1); /* RA is resolved later */ |
3c5772a5 JC |
589 | memcpy(hdr->addr2, meshsa, ETH_ALEN); |
590 | memcpy(hdr->addr3, meshda, ETH_ALEN); | |
591 | memcpy(hdr->addr4, meshsa, ETH_ALEN); | |
592 | return 30; | |
593 | } | |
594 | } | |
595 | ||
902acc78 JB |
596 | /** |
597 | * ieee80211_new_mesh_header - create a new mesh header | |
902acc78 | 598 | * @sdata: mesh interface to be used |
bf7cd94d | 599 | * @meshhdr: uninitialized mesh header |
61ad5394 JC |
600 | * @addr4or5: 1st address in the ae header, which may correspond to address 4 |
601 | * (if addr6 is NULL) or address 5 (if addr6 is present). It may | |
602 | * be NULL. | |
603 | * @addr6: 2nd address in the ae header, which corresponds to addr6 of the | |
604 | * mesh frame | |
902acc78 JB |
605 | * |
606 | * Return the header length. | |
607 | */ | |
5edfcee5 AH |
608 | unsigned int ieee80211_new_mesh_header(struct ieee80211_sub_if_data *sdata, |
609 | struct ieee80211s_hdr *meshhdr, | |
610 | const char *addr4or5, const char *addr6) | |
902acc78 | 611 | { |
bf7cd94d JB |
612 | if (WARN_ON(!addr4or5 && addr6)) |
613 | return 0; | |
614 | ||
0c3cee72 | 615 | memset(meshhdr, 0, sizeof(*meshhdr)); |
bf7cd94d | 616 | |
472dbc45 | 617 | meshhdr->ttl = sdata->u.mesh.mshcfg.dot11MeshTTL; |
bf7cd94d JB |
618 | |
619 | /* FIXME: racy -- TX on multiple queues can be concurrent */ | |
472dbc45 JB |
620 | put_unaligned(cpu_to_le32(sdata->u.mesh.mesh_seqnum), &meshhdr->seqnum); |
621 | sdata->u.mesh.mesh_seqnum++; | |
bf7cd94d | 622 | |
61ad5394 | 623 | if (addr4or5 && !addr6) { |
3c5772a5 | 624 | meshhdr->flags |= MESH_FLAGS_AE_A4; |
61ad5394 | 625 | memcpy(meshhdr->eaddr1, addr4or5, ETH_ALEN); |
bf7cd94d | 626 | return 2 * ETH_ALEN; |
61ad5394 | 627 | } else if (addr4or5 && addr6) { |
3c5772a5 | 628 | meshhdr->flags |= MESH_FLAGS_AE_A5_A6; |
61ad5394 JC |
629 | memcpy(meshhdr->eaddr1, addr4or5, ETH_ALEN); |
630 | memcpy(meshhdr->eaddr2, addr6, ETH_ALEN); | |
bf7cd94d | 631 | return 3 * ETH_ALEN; |
3c5772a5 | 632 | } |
bf7cd94d JB |
633 | |
634 | return ETH_ALEN; | |
902acc78 JB |
635 | } |
636 | ||
bf7cd94d | 637 | static void ieee80211_mesh_housekeeping(struct ieee80211_sub_if_data *sdata) |
472dbc45 | 638 | { |
bf7cd94d | 639 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
df323818 | 640 | u32 changed; |
472dbc45 | 641 | |
31f909a2 MH |
642 | if (ifmsh->mshcfg.plink_timeout > 0) |
643 | ieee80211_sta_expire(sdata, ifmsh->mshcfg.plink_timeout * HZ); | |
472dbc45 JB |
644 | mesh_path_expire(sdata); |
645 | ||
df323818 | 646 | changed = mesh_accept_plinks_update(sdata); |
2b5e1967 | 647 | ieee80211_mbss_info_change_notify(sdata, changed); |
472dbc45 | 648 | |
472dbc45 | 649 | mod_timer(&ifmsh->housekeeping_timer, |
bf7cd94d JB |
650 | round_jiffies(jiffies + |
651 | IEEE80211_MESH_HOUSEKEEPING_INTERVAL)); | |
472dbc45 JB |
652 | } |
653 | ||
e304bfd3 RP |
654 | static void ieee80211_mesh_rootpath(struct ieee80211_sub_if_data *sdata) |
655 | { | |
656 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
a69cc44f | 657 | u32 interval; |
e304bfd3 RP |
658 | |
659 | mesh_path_tx_root_frame(sdata); | |
a69cc44f CYY |
660 | |
661 | if (ifmsh->mshcfg.dot11MeshHWMPRootMode == IEEE80211_PROACTIVE_RANN) | |
662 | interval = ifmsh->mshcfg.dot11MeshHWMPRannInterval; | |
663 | else | |
664 | interval = ifmsh->mshcfg.dot11MeshHWMProotInterval; | |
665 | ||
e304bfd3 | 666 | mod_timer(&ifmsh->mesh_path_root_timer, |
a69cc44f | 667 | round_jiffies(TU_TO_EXP_TIME(interval))); |
e304bfd3 RP |
668 | } |
669 | ||
2b5e1967 TP |
670 | static int |
671 | ieee80211_mesh_build_beacon(struct ieee80211_if_mesh *ifmsh) | |
672 | { | |
673 | struct beacon_data *bcn; | |
674 | int head_len, tail_len; | |
675 | struct sk_buff *skb; | |
676 | struct ieee80211_mgmt *mgmt; | |
677 | struct ieee80211_chanctx_conf *chanctx_conf; | |
b8456a14 | 678 | struct mesh_csa_settings *csa; |
57fbcce3 | 679 | enum nl80211_band band; |
2b5e1967 TP |
680 | u8 *pos; |
681 | struct ieee80211_sub_if_data *sdata; | |
4c121fd6 | 682 | int hdr_len = offsetofend(struct ieee80211_mgmt, u.beacon); |
2b5e1967 TP |
683 | |
684 | sdata = container_of(ifmsh, struct ieee80211_sub_if_data, u.mesh); | |
685 | rcu_read_lock(); | |
686 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
687 | band = chanctx_conf->def.chan->band; | |
688 | rcu_read_unlock(); | |
689 | ||
690 | head_len = hdr_len + | |
691 | 2 + /* NULL SSID */ | |
b8456a14 CYY |
692 | /* Channel Switch Announcement */ |
693 | 2 + sizeof(struct ieee80211_channel_sw_ie) + | |
08a7e621 | 694 | /* Mesh Channel Switch Parameters */ |
b8456a14 | 695 | 2 + sizeof(struct ieee80211_mesh_chansw_params_ie) + |
75d627d5 SW |
696 | /* Channel Switch Wrapper + Wide Bandwidth CSA IE */ |
697 | 2 + 2 + sizeof(struct ieee80211_wide_bw_chansw_ie) + | |
698 | 2 + sizeof(struct ieee80211_sec_chan_offs_ie) + | |
2b5e1967 TP |
699 | 2 + 8 + /* supported rates */ |
700 | 2 + 3; /* DS params */ | |
701 | tail_len = 2 + (IEEE80211_MAX_SUPP_RATES - 8) + | |
702 | 2 + sizeof(struct ieee80211_ht_cap) + | |
703 | 2 + sizeof(struct ieee80211_ht_operation) + | |
704 | 2 + ifmsh->mesh_id_len + | |
705 | 2 + sizeof(struct ieee80211_meshconf_ie) + | |
706 | 2 + sizeof(__le16) + /* awake window */ | |
c85fb53c BC |
707 | 2 + sizeof(struct ieee80211_vht_cap) + |
708 | 2 + sizeof(struct ieee80211_vht_operation) + | |
2b5e1967 TP |
709 | ifmsh->ie_len; |
710 | ||
711 | bcn = kzalloc(sizeof(*bcn) + head_len + tail_len, GFP_KERNEL); | |
712 | /* need an skb for IE builders to operate on */ | |
713 | skb = dev_alloc_skb(max(head_len, tail_len)); | |
714 | ||
715 | if (!bcn || !skb) | |
716 | goto out_free; | |
717 | ||
718 | /* | |
719 | * pointers go into the block we allocated, | |
720 | * memory is | beacon_data | head | tail | | |
721 | */ | |
722 | bcn->head = ((u8 *) bcn) + sizeof(*bcn); | |
723 | ||
724 | /* fill in the head */ | |
b080db58 | 725 | mgmt = skb_put_zero(skb, hdr_len); |
2b5e1967 TP |
726 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
727 | IEEE80211_STYPE_BEACON); | |
728 | eth_broadcast_addr(mgmt->da); | |
729 | memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); | |
730 | memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN); | |
731 | ieee80211_mps_set_frame_flags(sdata, NULL, (void *) mgmt); | |
732 | mgmt->u.beacon.beacon_int = | |
733 | cpu_to_le16(sdata->vif.bss_conf.beacon_int); | |
734 | mgmt->u.beacon.capab_info |= cpu_to_le16( | |
735 | sdata->u.mesh.security ? WLAN_CAPABILITY_PRIVACY : 0); | |
736 | ||
737 | pos = skb_put(skb, 2); | |
738 | *pos++ = WLAN_EID_SSID; | |
739 | *pos++ = 0x0; | |
740 | ||
b8456a14 CYY |
741 | rcu_read_lock(); |
742 | csa = rcu_dereference(ifmsh->csa); | |
743 | if (csa) { | |
75d627d5 SW |
744 | enum nl80211_channel_type ct; |
745 | struct cfg80211_chan_def *chandef; | |
746 | int ie_len = 2 + sizeof(struct ieee80211_channel_sw_ie) + | |
747 | 2 + sizeof(struct ieee80211_mesh_chansw_params_ie); | |
748 | ||
e45a79da | 749 | pos = skb_put_zero(skb, ie_len); |
b8456a14 CYY |
750 | *pos++ = WLAN_EID_CHANNEL_SWITCH; |
751 | *pos++ = 3; | |
752 | *pos++ = 0x0; | |
753 | *pos++ = ieee80211_frequency_to_channel( | |
754 | csa->settings.chandef.chan->center_freq); | |
8df734e8 | 755 | bcn->csa_current_counter = csa->settings.count; |
af296bdb | 756 | bcn->csa_counter_offsets[0] = hdr_len + 6; |
b8456a14 CYY |
757 | *pos++ = csa->settings.count; |
758 | *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; | |
759 | *pos++ = 6; | |
0cb4d4dc | 760 | if (ifmsh->csa_role == IEEE80211_MESH_CSA_ROLE_INIT) { |
b8456a14 CYY |
761 | *pos++ = ifmsh->mshcfg.dot11MeshTTL; |
762 | *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR; | |
763 | } else { | |
764 | *pos++ = ifmsh->chsw_ttl; | |
765 | } | |
766 | *pos++ |= csa->settings.block_tx ? | |
767 | WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00; | |
768 | put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); | |
769 | pos += 2; | |
ca91dc97 | 770 | put_unaligned_le16(ifmsh->pre_value, pos); |
b8456a14 | 771 | pos += 2; |
75d627d5 SW |
772 | |
773 | switch (csa->settings.chandef.width) { | |
774 | case NL80211_CHAN_WIDTH_40: | |
775 | ie_len = 2 + sizeof(struct ieee80211_sec_chan_offs_ie); | |
e45a79da | 776 | pos = skb_put_zero(skb, ie_len); |
75d627d5 SW |
777 | |
778 | *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */ | |
779 | *pos++ = 1; /* len */ | |
780 | ct = cfg80211_get_chandef_type(&csa->settings.chandef); | |
781 | if (ct == NL80211_CHAN_HT40PLUS) | |
782 | *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE; | |
783 | else | |
784 | *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW; | |
785 | break; | |
786 | case NL80211_CHAN_WIDTH_80: | |
787 | case NL80211_CHAN_WIDTH_80P80: | |
788 | case NL80211_CHAN_WIDTH_160: | |
789 | /* Channel Switch Wrapper + Wide Bandwidth CSA IE */ | |
790 | ie_len = 2 + 2 + | |
791 | sizeof(struct ieee80211_wide_bw_chansw_ie); | |
e45a79da | 792 | pos = skb_put_zero(skb, ie_len); |
75d627d5 SW |
793 | |
794 | *pos++ = WLAN_EID_CHANNEL_SWITCH_WRAPPER; /* EID */ | |
795 | *pos++ = 5; /* len */ | |
796 | /* put sub IE */ | |
797 | chandef = &csa->settings.chandef; | |
798 | ieee80211_ie_build_wide_bw_cs(pos, chandef); | |
799 | break; | |
800 | default: | |
801 | break; | |
802 | } | |
b8456a14 CYY |
803 | } |
804 | rcu_read_unlock(); | |
805 | ||
2b5e1967 | 806 | if (ieee80211_add_srates_ie(sdata, skb, true, band) || |
bf7cd94d | 807 | mesh_add_ds_params_ie(sdata, skb)) |
2b5e1967 TP |
808 | goto out_free; |
809 | ||
810 | bcn->head_len = skb->len; | |
811 | memcpy(bcn->head, skb->data, bcn->head_len); | |
812 | ||
813 | /* now the tail */ | |
814 | skb_trim(skb, 0); | |
815 | bcn->tail = bcn->head + bcn->head_len; | |
816 | ||
817 | if (ieee80211_add_ext_srates_ie(sdata, skb, true, band) || | |
bf7cd94d JB |
818 | mesh_add_rsn_ie(sdata, skb) || |
819 | mesh_add_ht_cap_ie(sdata, skb) || | |
820 | mesh_add_ht_oper_ie(sdata, skb) || | |
821 | mesh_add_meshid_ie(sdata, skb) || | |
822 | mesh_add_meshconf_ie(sdata, skb) || | |
823 | mesh_add_awake_window_ie(sdata, skb) || | |
c85fb53c BC |
824 | mesh_add_vht_cap_ie(sdata, skb) || |
825 | mesh_add_vht_oper_ie(sdata, skb) || | |
bf7cd94d | 826 | mesh_add_vendor_ies(sdata, skb)) |
2b5e1967 TP |
827 | goto out_free; |
828 | ||
829 | bcn->tail_len = skb->len; | |
830 | memcpy(bcn->tail, skb->data, bcn->tail_len); | |
43552be1 TP |
831 | bcn->meshconf = (struct ieee80211_meshconf_ie *) |
832 | (bcn->tail + ifmsh->meshconf_offset); | |
2b5e1967 TP |
833 | |
834 | dev_kfree_skb(skb); | |
835 | rcu_assign_pointer(ifmsh->beacon, bcn); | |
836 | return 0; | |
837 | out_free: | |
838 | kfree(bcn); | |
839 | dev_kfree_skb(skb); | |
840 | return -ENOMEM; | |
841 | } | |
842 | ||
843 | static int | |
8d61ffa5 | 844 | ieee80211_mesh_rebuild_beacon(struct ieee80211_sub_if_data *sdata) |
2b5e1967 | 845 | { |
2b5e1967 TP |
846 | struct beacon_data *old_bcn; |
847 | int ret; | |
2b5e1967 | 848 | |
8d61ffa5 JB |
849 | old_bcn = rcu_dereference_protected(sdata->u.mesh.beacon, |
850 | lockdep_is_held(&sdata->wdev.mtx)); | |
851 | ret = ieee80211_mesh_build_beacon(&sdata->u.mesh); | |
2b5e1967 TP |
852 | if (ret) |
853 | /* just reuse old beacon */ | |
8d61ffa5 | 854 | return ret; |
2b5e1967 TP |
855 | |
856 | if (old_bcn) | |
857 | kfree_rcu(old_bcn, rcu_head); | |
8d61ffa5 | 858 | return 0; |
2b5e1967 TP |
859 | } |
860 | ||
861 | void ieee80211_mbss_info_change_notify(struct ieee80211_sub_if_data *sdata, | |
862 | u32 changed) | |
863 | { | |
f81a9ded TP |
864 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
865 | unsigned long bits = changed; | |
866 | u32 bit; | |
867 | ||
868 | if (!bits) | |
869 | return; | |
870 | ||
871 | /* if we race with running work, worst case this work becomes a noop */ | |
872 | for_each_set_bit(bit, &bits, sizeof(changed) * BITS_PER_BYTE) | |
873 | set_bit(bit, &ifmsh->mbss_changed); | |
874 | set_bit(MESH_WORK_MBSS_CHANGED, &ifmsh->wrkq_flags); | |
875 | ieee80211_queue_work(&sdata->local->hw, &sdata->work); | |
2b5e1967 TP |
876 | } |
877 | ||
878 | int ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata) | |
472dbc45 JB |
879 | { |
880 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
881 | struct ieee80211_local *local = sdata->local; | |
f4eabc91 CYY |
882 | u32 changed = BSS_CHANGED_BEACON | |
883 | BSS_CHANGED_BEACON_ENABLED | | |
884 | BSS_CHANGED_HT | | |
885 | BSS_CHANGED_BASIC_RATES | | |
dcbe73ca PKC |
886 | BSS_CHANGED_BEACON_INT | |
887 | BSS_CHANGED_MCAST_RATE; | |
472dbc45 | 888 | |
09b17470 JB |
889 | local->fif_other_bss++; |
890 | /* mesh ifaces must set allmulti to forward mcast traffic */ | |
891 | atomic_inc(&local->iff_allmultis); | |
892 | ieee80211_configure_filter(local); | |
893 | ||
c7108a71 | 894 | ifmsh->mesh_cc_id = 0; /* Disabled */ |
dbf498fb JC |
895 | /* register sync ops from extensible synchronization framework */ |
896 | ifmsh->sync_ops = ieee80211_mesh_sync_ops_get(ifmsh->mesh_sp_id); | |
dbf498fb | 897 | ifmsh->sync_offset_clockdrift_max = 0; |
6b9ac442 | 898 | set_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags); |
63c5723b | 899 | ieee80211_mesh_root_setup(ifmsh); |
64592c8f | 900 | ieee80211_queue_work(&local->hw, &sdata->work); |
70c33eaa AN |
901 | sdata->vif.bss_conf.ht_operation_mode = |
902 | ifmsh->mshcfg.ht_opmode; | |
d6a83228 | 903 | sdata->vif.bss_conf.enable_beacon = true; |
f4eabc91 | 904 | |
39886b61 | 905 | changed |= ieee80211_mps_local_status_update(sdata); |
3f52b7e3 | 906 | |
2b5e1967 TP |
907 | if (ieee80211_mesh_build_beacon(ifmsh)) { |
908 | ieee80211_stop_mesh(sdata); | |
909 | return -ENOMEM; | |
910 | } | |
911 | ||
057d5f4b | 912 | ieee80211_recalc_dtim(local, sdata); |
f4eabc91 | 913 | ieee80211_bss_info_change_notify(sdata, changed); |
c405c629 JB |
914 | |
915 | netif_carrier_on(sdata->dev); | |
2b5e1967 | 916 | return 0; |
472dbc45 JB |
917 | } |
918 | ||
919 | void ieee80211_stop_mesh(struct ieee80211_sub_if_data *sdata) | |
920 | { | |
09b17470 | 921 | struct ieee80211_local *local = sdata->local; |
29cbe68c | 922 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
2b5e1967 | 923 | struct beacon_data *bcn; |
29cbe68c | 924 | |
c405c629 JB |
925 | netif_carrier_off(sdata->dev); |
926 | ||
c37a54ac MH |
927 | /* flush STAs and mpaths on this iface */ |
928 | sta_info_flush(sdata); | |
929 | mesh_path_flush_by_iface(sdata); | |
930 | ||
0d466b9c | 931 | /* stop the beacon */ |
29cbe68c | 932 | ifmsh->mesh_id_len = 0; |
d6a83228 JB |
933 | sdata->vif.bss_conf.enable_beacon = false; |
934 | clear_bit(SDATA_STATE_OFFCHANNEL_BEACON_STOPPED, &sdata->state); | |
29cbe68c | 935 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON_ENABLED); |
c37a54ac MH |
936 | |
937 | /* remove beacon */ | |
2b5e1967 | 938 | bcn = rcu_dereference_protected(ifmsh->beacon, |
8d61ffa5 | 939 | lockdep_is_held(&sdata->wdev.mtx)); |
0c2bef46 | 940 | RCU_INIT_POINTER(ifmsh->beacon, NULL); |
2b5e1967 | 941 | kfree_rcu(bcn, rcu_head); |
0d466b9c | 942 | |
3f52b7e3 MP |
943 | /* free all potentially still buffered group-addressed frames */ |
944 | local->total_ps_buffered -= skb_queue_len(&ifmsh->ps.bc_buf); | |
945 | skb_queue_purge(&ifmsh->ps.bc_buf); | |
946 | ||
472dbc45 | 947 | del_timer_sync(&sdata->u.mesh.housekeeping_timer); |
e304bfd3 | 948 | del_timer_sync(&sdata->u.mesh.mesh_path_root_timer); |
dd4c9260 | 949 | del_timer_sync(&sdata->u.mesh.mesh_path_timer); |
09b17470 | 950 | |
f81a9ded TP |
951 | /* clear any mesh work (for next join) we may have accrued */ |
952 | ifmsh->wrkq_flags = 0; | |
953 | ifmsh->mbss_changed = 0; | |
954 | ||
09b17470 JB |
955 | local->fif_other_bss--; |
956 | atomic_dec(&local->iff_allmultis); | |
957 | ieee80211_configure_filter(local); | |
472dbc45 JB |
958 | } |
959 | ||
5d55371b BB |
960 | static void ieee80211_mesh_csa_mark_radar(struct ieee80211_sub_if_data *sdata) |
961 | { | |
962 | int err; | |
963 | ||
964 | /* if the current channel is a DFS channel, mark the channel as | |
965 | * unavailable. | |
966 | */ | |
967 | err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy, | |
968 | &sdata->vif.bss_conf.chandef, | |
969 | NL80211_IFTYPE_MESH_POINT); | |
970 | if (err > 0) | |
971 | cfg80211_radar_event(sdata->local->hw.wiphy, | |
972 | &sdata->vif.bss_conf.chandef, GFP_ATOMIC); | |
973 | } | |
974 | ||
33a45867 CYY |
975 | static bool |
976 | ieee80211_mesh_process_chnswitch(struct ieee80211_sub_if_data *sdata, | |
977 | struct ieee802_11_elems *elems, bool beacon) | |
978 | { | |
979 | struct cfg80211_csa_settings params; | |
980 | struct ieee80211_csa_ie csa_ie; | |
33a45867 | 981 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
21a8e9dd | 982 | struct ieee80211_supported_band *sband; |
0cb4d4dc | 983 | int err; |
33a45867 CYY |
984 | u32 sta_flags; |
985 | ||
dbd72850 MK |
986 | sdata_assert_lock(sdata); |
987 | ||
21a8e9dd MSS |
988 | sband = ieee80211_get_sband(sdata); |
989 | if (!sband) | |
990 | return false; | |
991 | ||
71ec289e | 992 | sta_flags = 0; |
33a45867 CYY |
993 | switch (sdata->vif.bss_conf.chandef.width) { |
994 | case NL80211_CHAN_WIDTH_20_NOHT: | |
995 | sta_flags |= IEEE80211_STA_DISABLE_HT; | |
02049ce2 | 996 | /* fall through */ |
33a45867 CYY |
997 | case NL80211_CHAN_WIDTH_20: |
998 | sta_flags |= IEEE80211_STA_DISABLE_40MHZ; | |
02049ce2 | 999 | /* fall through */ |
71ec289e SW |
1000 | case NL80211_CHAN_WIDTH_40: |
1001 | sta_flags |= IEEE80211_STA_DISABLE_VHT; | |
33a45867 CYY |
1002 | break; |
1003 | default: | |
1004 | break; | |
1005 | } | |
1006 | ||
1007 | memset(¶ms, 0, sizeof(params)); | |
21a8e9dd | 1008 | err = ieee80211_parse_ch_switch_ie(sdata, elems, sband->band, |
33a45867 CYY |
1009 | sta_flags, sdata->vif.addr, |
1010 | &csa_ie); | |
1011 | if (err < 0) | |
1012 | return false; | |
1013 | if (err) | |
1014 | return false; | |
1015 | ||
5d55371b BB |
1016 | /* Mark the channel unavailable if the reason for the switch is |
1017 | * regulatory. | |
1018 | */ | |
1019 | if (csa_ie.reason_code == WLAN_REASON_MESH_CHAN_REGULATORY) | |
1020 | ieee80211_mesh_csa_mark_radar(sdata); | |
1021 | ||
33a45867 CYY |
1022 | params.chandef = csa_ie.chandef; |
1023 | params.count = csa_ie.count; | |
1024 | ||
33a45867 | 1025 | if (!cfg80211_chandef_usable(sdata->local->hw.wiphy, ¶ms.chandef, |
0ab2e55d BB |
1026 | IEEE80211_CHAN_DISABLED) || |
1027 | !cfg80211_reg_can_beacon(sdata->local->hw.wiphy, ¶ms.chandef, | |
1028 | NL80211_IFTYPE_MESH_POINT)) { | |
33a45867 CYY |
1029 | sdata_info(sdata, |
1030 | "mesh STA %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), aborting\n", | |
1031 | sdata->vif.addr, | |
1032 | params.chandef.chan->center_freq, | |
1033 | params.chandef.width, | |
1034 | params.chandef.center_freq1, | |
1035 | params.chandef.center_freq2); | |
1036 | return false; | |
1037 | } | |
1038 | ||
1039 | err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy, | |
2beb6dab LC |
1040 | ¶ms.chandef, |
1041 | NL80211_IFTYPE_MESH_POINT); | |
33a45867 CYY |
1042 | if (err < 0) |
1043 | return false; | |
0ab2e55d BB |
1044 | if (err > 0 && !ifmsh->userspace_handles_dfs) { |
1045 | sdata_info(sdata, | |
1046 | "mesh STA %pM switches to channel requiring DFS (%d MHz, width:%d, CF1/2: %d/%d MHz), aborting\n", | |
1047 | sdata->vif.addr, | |
1048 | params.chandef.chan->center_freq, | |
1049 | params.chandef.width, | |
1050 | params.chandef.center_freq1, | |
1051 | params.chandef.center_freq2); | |
33a45867 | 1052 | return false; |
0ab2e55d | 1053 | } |
2beb6dab LC |
1054 | |
1055 | params.radar_required = err; | |
33a45867 | 1056 | |
0cb4d4dc LC |
1057 | if (cfg80211_chandef_identical(¶ms.chandef, |
1058 | &sdata->vif.bss_conf.chandef)) { | |
1059 | mcsa_dbg(sdata, | |
1060 | "received csa with an identical chandef, ignoring\n"); | |
1061 | return true; | |
1062 | } | |
33a45867 CYY |
1063 | |
1064 | mcsa_dbg(sdata, | |
1065 | "received channel switch announcement to go to channel %d MHz\n", | |
1066 | params.chandef.chan->center_freq); | |
1067 | ||
1068 | params.block_tx = csa_ie.mode & WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT; | |
3f718fd8 | 1069 | if (beacon) { |
33a45867 | 1070 | ifmsh->chsw_ttl = csa_ie.ttl - 1; |
3f718fd8 CYY |
1071 | if (ifmsh->pre_value >= csa_ie.pre_value) |
1072 | return false; | |
1073 | ifmsh->pre_value = csa_ie.pre_value; | |
1074 | } | |
33a45867 | 1075 | |
0cb4d4dc | 1076 | if (ifmsh->chsw_ttl >= ifmsh->mshcfg.dot11MeshTTL) |
3f718fd8 | 1077 | return false; |
33a45867 | 1078 | |
0cb4d4dc | 1079 | ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_REPEATER; |
33a45867 | 1080 | |
0cb4d4dc LC |
1081 | if (ieee80211_channel_switch(sdata->local->hw.wiphy, sdata->dev, |
1082 | ¶ms) < 0) | |
1083 | return false; | |
33a45867 CYY |
1084 | |
1085 | return true; | |
33a45867 CYY |
1086 | } |
1087 | ||
9fb04b50 TP |
1088 | static void |
1089 | ieee80211_mesh_rx_probe_req(struct ieee80211_sub_if_data *sdata, | |
1090 | struct ieee80211_mgmt *mgmt, size_t len) | |
1091 | { | |
1092 | struct ieee80211_local *local = sdata->local; | |
1093 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
1094 | struct sk_buff *presp; | |
1095 | struct beacon_data *bcn; | |
1096 | struct ieee80211_mgmt *hdr; | |
1097 | struct ieee802_11_elems elems; | |
1098 | size_t baselen; | |
511044ea | 1099 | u8 *pos; |
9fb04b50 | 1100 | |
9fb04b50 TP |
1101 | pos = mgmt->u.probe_req.variable; |
1102 | baselen = (u8 *) pos - (u8 *) mgmt; | |
1103 | if (baselen > len) | |
1104 | return; | |
1105 | ||
b2e506bf | 1106 | ieee802_11_parse_elems(pos, len - baselen, false, &elems); |
9fb04b50 | 1107 | |
a4ef66a9 CYY |
1108 | if (!elems.mesh_id) |
1109 | return; | |
1110 | ||
9fb04b50 TP |
1111 | /* 802.11-2012 10.1.4.3.2 */ |
1112 | if ((!ether_addr_equal(mgmt->da, sdata->vif.addr) && | |
1113 | !is_broadcast_ether_addr(mgmt->da)) || | |
1114 | elems.ssid_len != 0) | |
1115 | return; | |
1116 | ||
1117 | if (elems.mesh_id_len != 0 && | |
1118 | (elems.mesh_id_len != ifmsh->mesh_id_len || | |
1119 | memcmp(elems.mesh_id, ifmsh->mesh_id, ifmsh->mesh_id_len))) | |
1120 | return; | |
1121 | ||
1122 | rcu_read_lock(); | |
1123 | bcn = rcu_dereference(ifmsh->beacon); | |
1124 | ||
1125 | if (!bcn) | |
1126 | goto out; | |
1127 | ||
1128 | presp = dev_alloc_skb(local->tx_headroom + | |
1129 | bcn->head_len + bcn->tail_len); | |
1130 | if (!presp) | |
1131 | goto out; | |
1132 | ||
1133 | skb_reserve(presp, local->tx_headroom); | |
59ae1d12 JB |
1134 | skb_put_data(presp, bcn->head, bcn->head_len); |
1135 | skb_put_data(presp, bcn->tail, bcn->tail_len); | |
9fb04b50 TP |
1136 | hdr = (struct ieee80211_mgmt *) presp->data; |
1137 | hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
1138 | IEEE80211_STYPE_PROBE_RESP); | |
1139 | memcpy(hdr->da, mgmt->sa, ETH_ALEN); | |
9fb04b50 TP |
1140 | IEEE80211_SKB_CB(presp)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
1141 | ieee80211_tx_skb(sdata, presp); | |
1142 | out: | |
1143 | rcu_read_unlock(); | |
1144 | } | |
1145 | ||
472dbc45 JB |
1146 | static void ieee80211_mesh_rx_bcn_presp(struct ieee80211_sub_if_data *sdata, |
1147 | u16 stype, | |
1148 | struct ieee80211_mgmt *mgmt, | |
1149 | size_t len, | |
1150 | struct ieee80211_rx_status *rx_status) | |
1151 | { | |
c6a1fa12 | 1152 | struct ieee80211_local *local = sdata->local; |
dbf498fb | 1153 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
472dbc45 JB |
1154 | struct ieee802_11_elems elems; |
1155 | struct ieee80211_channel *channel; | |
472dbc45 JB |
1156 | size_t baselen; |
1157 | int freq; | |
57fbcce3 | 1158 | enum nl80211_band band = rx_status->band; |
472dbc45 JB |
1159 | |
1160 | /* ignore ProbeResp to foreign address */ | |
1161 | if (stype == IEEE80211_STYPE_PROBE_RESP && | |
b203ca39 | 1162 | !ether_addr_equal(mgmt->da, sdata->vif.addr)) |
472dbc45 JB |
1163 | return; |
1164 | ||
1165 | baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; | |
1166 | if (baselen > len) | |
1167 | return; | |
1168 | ||
1169 | ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, | |
b2e506bf | 1170 | false, &elems); |
472dbc45 | 1171 | |
9a90bc81 TP |
1172 | /* ignore non-mesh or secure / unsecure mismatch */ |
1173 | if ((!elems.mesh_id || !elems.mesh_config) || | |
1174 | (elems.rsn && sdata->u.mesh.security == IEEE80211_MESH_SEC_NONE) || | |
1175 | (!elems.rsn && sdata->u.mesh.security != IEEE80211_MESH_SEC_NONE)) | |
5cff5e01 JC |
1176 | return; |
1177 | ||
1cd8e88e | 1178 | if (elems.ds_params) |
59eb21a6 | 1179 | freq = ieee80211_channel_to_frequency(elems.ds_params[0], band); |
472dbc45 JB |
1180 | else |
1181 | freq = rx_status->freq; | |
1182 | ||
1183 | channel = ieee80211_get_channel(local->hw.wiphy, freq); | |
1184 | ||
1185 | if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) | |
1186 | return; | |
1187 | ||
ed92a9b5 MH |
1188 | if (mesh_matches_local(sdata, &elems)) { |
1189 | mpl_dbg(sdata, "rssi_threshold=%d,rx_status->signal=%d\n", | |
1190 | sdata->u.mesh.mshcfg.rssi_threshold, rx_status->signal); | |
1191 | if (!sdata->u.mesh.user_mpm || | |
1192 | sdata->u.mesh.mshcfg.rssi_threshold == 0 || | |
1193 | sdata->u.mesh.mshcfg.rssi_threshold < rx_status->signal) | |
1194 | mesh_neighbour_update(sdata, mgmt->sa, &elems); | |
1195 | } | |
dbf498fb JC |
1196 | |
1197 | if (ifmsh->sync_ops) | |
1198 | ifmsh->sync_ops->rx_bcn_presp(sdata, | |
1199 | stype, mgmt, &elems, rx_status); | |
33a45867 | 1200 | |
0cb4d4dc LC |
1201 | if (ifmsh->csa_role != IEEE80211_MESH_CSA_ROLE_INIT && |
1202 | !sdata->vif.csa_active) | |
33a45867 | 1203 | ieee80211_mesh_process_chnswitch(sdata, &elems, true); |
472dbc45 JB |
1204 | } |
1205 | ||
b8456a14 CYY |
1206 | int ieee80211_mesh_finish_csa(struct ieee80211_sub_if_data *sdata) |
1207 | { | |
1208 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
1209 | struct mesh_csa_settings *tmp_csa_settings; | |
1210 | int ret = 0; | |
faf046e7 | 1211 | int changed = 0; |
b8456a14 CYY |
1212 | |
1213 | /* Reset the TTL value and Initiator flag */ | |
0cb4d4dc | 1214 | ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_NONE; |
b8456a14 CYY |
1215 | ifmsh->chsw_ttl = 0; |
1216 | ||
1217 | /* Remove the CSA and MCSP elements from the beacon */ | |
1218 | tmp_csa_settings = rcu_dereference(ifmsh->csa); | |
0c2bef46 | 1219 | RCU_INIT_POINTER(ifmsh->csa, NULL); |
66e01cf9 LC |
1220 | if (tmp_csa_settings) |
1221 | kfree_rcu(tmp_csa_settings, rcu_head); | |
b8456a14 CYY |
1222 | ret = ieee80211_mesh_rebuild_beacon(sdata); |
1223 | if (ret) | |
1224 | return -EINVAL; | |
1225 | ||
faf046e7 | 1226 | changed |= BSS_CHANGED_BEACON; |
b8456a14 CYY |
1227 | |
1228 | mcsa_dbg(sdata, "complete switching to center freq %d MHz", | |
1229 | sdata->vif.bss_conf.chandef.chan->center_freq); | |
faf046e7 | 1230 | return changed; |
b8456a14 CYY |
1231 | } |
1232 | ||
1233 | int ieee80211_mesh_csa_beacon(struct ieee80211_sub_if_data *sdata, | |
66e01cf9 | 1234 | struct cfg80211_csa_settings *csa_settings) |
b8456a14 CYY |
1235 | { |
1236 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
1237 | struct mesh_csa_settings *tmp_csa_settings; | |
1238 | int ret = 0; | |
1239 | ||
1240 | tmp_csa_settings = kmalloc(sizeof(*tmp_csa_settings), | |
1241 | GFP_ATOMIC); | |
1242 | if (!tmp_csa_settings) | |
1243 | return -ENOMEM; | |
1244 | ||
1245 | memcpy(&tmp_csa_settings->settings, csa_settings, | |
1246 | sizeof(struct cfg80211_csa_settings)); | |
1247 | ||
1248 | rcu_assign_pointer(ifmsh->csa, tmp_csa_settings); | |
1249 | ||
1250 | ret = ieee80211_mesh_rebuild_beacon(sdata); | |
1251 | if (ret) { | |
1252 | tmp_csa_settings = rcu_dereference(ifmsh->csa); | |
0c2bef46 | 1253 | RCU_INIT_POINTER(ifmsh->csa, NULL); |
b8456a14 CYY |
1254 | kfree_rcu(tmp_csa_settings, rcu_head); |
1255 | return ret; | |
1256 | } | |
1257 | ||
b58e81e9 | 1258 | return BSS_CHANGED_BEACON; |
b8456a14 CYY |
1259 | } |
1260 | ||
8f2535b9 | 1261 | static int mesh_fwd_csa_frame(struct ieee80211_sub_if_data *sdata, |
c4de37ee PO |
1262 | struct ieee80211_mgmt *mgmt, size_t len, |
1263 | struct ieee802_11_elems *elems) | |
8f2535b9 CYY |
1264 | { |
1265 | struct ieee80211_mgmt *mgmt_fwd; | |
1266 | struct sk_buff *skb; | |
1267 | struct ieee80211_local *local = sdata->local; | |
8f2535b9 CYY |
1268 | |
1269 | skb = dev_alloc_skb(local->tx_headroom + len); | |
1270 | if (!skb) | |
1271 | return -ENOMEM; | |
1272 | skb_reserve(skb, local->tx_headroom); | |
4df864c1 | 1273 | mgmt_fwd = skb_put(skb, len); |
8f2535b9 | 1274 | |
c4de37ee PO |
1275 | elems->mesh_chansw_params_ie->mesh_ttl--; |
1276 | elems->mesh_chansw_params_ie->mesh_flags &= | |
1277 | ~WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR; | |
8f2535b9 CYY |
1278 | |
1279 | memcpy(mgmt_fwd, mgmt, len); | |
1280 | eth_broadcast_addr(mgmt_fwd->da); | |
1281 | memcpy(mgmt_fwd->sa, sdata->vif.addr, ETH_ALEN); | |
1282 | memcpy(mgmt_fwd->bssid, sdata->vif.addr, ETH_ALEN); | |
1283 | ||
1284 | ieee80211_tx_skb(sdata, skb); | |
1285 | return 0; | |
1286 | } | |
1287 | ||
1288 | static void mesh_rx_csa_frame(struct ieee80211_sub_if_data *sdata, | |
1289 | struct ieee80211_mgmt *mgmt, size_t len) | |
1290 | { | |
1291 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
1292 | struct ieee802_11_elems elems; | |
1293 | u16 pre_value; | |
33a45867 | 1294 | bool fwd_csa = true; |
8f2535b9 | 1295 | size_t baselen; |
3f718fd8 | 1296 | u8 *pos; |
8f2535b9 CYY |
1297 | |
1298 | if (mgmt->u.action.u.measurement.action_code != | |
1299 | WLAN_ACTION_SPCT_CHL_SWITCH) | |
1300 | return; | |
1301 | ||
1302 | pos = mgmt->u.action.u.chan_switch.variable; | |
1303 | baselen = offsetof(struct ieee80211_mgmt, | |
1304 | u.action.u.chan_switch.variable); | |
3b23782f | 1305 | ieee802_11_parse_elems(pos, len - baselen, true, &elems); |
8f2535b9 | 1306 | |
3f718fd8 CYY |
1307 | ifmsh->chsw_ttl = elems.mesh_chansw_params_ie->mesh_ttl; |
1308 | if (!--ifmsh->chsw_ttl) | |
8f2535b9 CYY |
1309 | fwd_csa = false; |
1310 | ||
1311 | pre_value = le16_to_cpu(elems.mesh_chansw_params_ie->mesh_pre_value); | |
1312 | if (ifmsh->pre_value >= pre_value) | |
1313 | return; | |
1314 | ||
1315 | ifmsh->pre_value = pre_value; | |
1316 | ||
0cb4d4dc LC |
1317 | if (!sdata->vif.csa_active && |
1318 | !ieee80211_mesh_process_chnswitch(sdata, &elems, false)) { | |
33a45867 CYY |
1319 | mcsa_dbg(sdata, "Failed to process CSA action frame"); |
1320 | return; | |
1321 | } | |
1322 | ||
8f2535b9 CYY |
1323 | /* forward or re-broadcast the CSA frame */ |
1324 | if (fwd_csa) { | |
c4de37ee | 1325 | if (mesh_fwd_csa_frame(sdata, mgmt, len, &elems) < 0) |
8f2535b9 CYY |
1326 | mcsa_dbg(sdata, "Failed to forward the CSA frame"); |
1327 | } | |
8f2535b9 CYY |
1328 | } |
1329 | ||
472dbc45 JB |
1330 | static void ieee80211_mesh_rx_mgmt_action(struct ieee80211_sub_if_data *sdata, |
1331 | struct ieee80211_mgmt *mgmt, | |
1332 | size_t len, | |
1333 | struct ieee80211_rx_status *rx_status) | |
1334 | { | |
1335 | switch (mgmt->u.action.category) { | |
8db09850 TP |
1336 | case WLAN_CATEGORY_SELF_PROTECTED: |
1337 | switch (mgmt->u.action.u.self_prot.action_code) { | |
1338 | case WLAN_SP_MESH_PEERING_OPEN: | |
1339 | case WLAN_SP_MESH_PEERING_CLOSE: | |
1340 | case WLAN_SP_MESH_PEERING_CONFIRM: | |
1341 | mesh_rx_plink_frame(sdata, mgmt, len, rx_status); | |
1342 | break; | |
1343 | } | |
472dbc45 | 1344 | break; |
25d49e4d TP |
1345 | case WLAN_CATEGORY_MESH_ACTION: |
1346 | if (mesh_action_is_path_sel(mgmt)) | |
1347 | mesh_rx_path_sel_frame(sdata, mgmt, len); | |
472dbc45 | 1348 | break; |
8f2535b9 CYY |
1349 | case WLAN_CATEGORY_SPECTRUM_MGMT: |
1350 | mesh_rx_csa_frame(sdata, mgmt, len); | |
1351 | break; | |
472dbc45 JB |
1352 | } |
1353 | } | |
1354 | ||
1fa57d01 JB |
1355 | void ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, |
1356 | struct sk_buff *skb) | |
472dbc45 JB |
1357 | { |
1358 | struct ieee80211_rx_status *rx_status; | |
472dbc45 JB |
1359 | struct ieee80211_mgmt *mgmt; |
1360 | u16 stype; | |
1361 | ||
ecccd072 TP |
1362 | sdata_lock(sdata); |
1363 | ||
1364 | /* mesh already went down */ | |
1693d344 | 1365 | if (!sdata->u.mesh.mesh_id_len) |
ecccd072 TP |
1366 | goto out; |
1367 | ||
f1d58c25 | 1368 | rx_status = IEEE80211_SKB_RXCB(skb); |
472dbc45 JB |
1369 | mgmt = (struct ieee80211_mgmt *) skb->data; |
1370 | stype = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE; | |
1371 | ||
1372 | switch (stype) { | |
1373 | case IEEE80211_STYPE_PROBE_RESP: | |
1374 | case IEEE80211_STYPE_BEACON: | |
1375 | ieee80211_mesh_rx_bcn_presp(sdata, stype, mgmt, skb->len, | |
1376 | rx_status); | |
1377 | break; | |
9fb04b50 TP |
1378 | case IEEE80211_STYPE_PROBE_REQ: |
1379 | ieee80211_mesh_rx_probe_req(sdata, mgmt, skb->len); | |
1380 | break; | |
472dbc45 JB |
1381 | case IEEE80211_STYPE_ACTION: |
1382 | ieee80211_mesh_rx_mgmt_action(sdata, mgmt, skb->len, rx_status); | |
1383 | break; | |
1384 | } | |
ecccd072 TP |
1385 | out: |
1386 | sdata_unlock(sdata); | |
472dbc45 JB |
1387 | } |
1388 | ||
f81a9ded TP |
1389 | static void mesh_bss_info_changed(struct ieee80211_sub_if_data *sdata) |
1390 | { | |
1391 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
1392 | u32 bit, changed = 0; | |
1393 | ||
1394 | for_each_set_bit(bit, &ifmsh->mbss_changed, | |
1395 | sizeof(changed) * BITS_PER_BYTE) { | |
1396 | clear_bit(bit, &ifmsh->mbss_changed); | |
1397 | changed |= BIT(bit); | |
1398 | } | |
1399 | ||
1400 | if (sdata->vif.bss_conf.enable_beacon && | |
1401 | (changed & (BSS_CHANGED_BEACON | | |
1402 | BSS_CHANGED_HT | | |
1403 | BSS_CHANGED_BASIC_RATES | | |
1404 | BSS_CHANGED_BEACON_INT))) | |
1405 | if (ieee80211_mesh_rebuild_beacon(sdata)) | |
1406 | return; | |
1407 | ||
1408 | ieee80211_bss_info_change_notify(sdata, changed); | |
1409 | } | |
1410 | ||
1fa57d01 | 1411 | void ieee80211_mesh_work(struct ieee80211_sub_if_data *sdata) |
472dbc45 | 1412 | { |
472dbc45 | 1413 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
472dbc45 | 1414 | |
ecccd072 TP |
1415 | sdata_lock(sdata); |
1416 | ||
1417 | /* mesh already went down */ | |
1693d344 | 1418 | if (!sdata->u.mesh.mesh_id_len) |
ecccd072 TP |
1419 | goto out; |
1420 | ||
472dbc45 JB |
1421 | if (ifmsh->preq_queue_len && |
1422 | time_after(jiffies, | |
1423 | ifmsh->last_preq + msecs_to_jiffies(ifmsh->mshcfg.dot11MeshHWMPpreqMinInterval))) | |
1424 | mesh_path_start_discovery(sdata); | |
1425 | ||
18889231 | 1426 | if (test_and_clear_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags)) |
bf7cd94d | 1427 | ieee80211_mesh_housekeeping(sdata); |
e304bfd3 RP |
1428 | |
1429 | if (test_and_clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags)) | |
1430 | ieee80211_mesh_rootpath(sdata); | |
dbf498fb JC |
1431 | |
1432 | if (test_and_clear_bit(MESH_WORK_DRIFT_ADJUST, &ifmsh->wrkq_flags)) | |
445cd452 | 1433 | mesh_sync_adjust_tsf(sdata); |
ecccd072 | 1434 | |
f81a9ded TP |
1435 | if (test_and_clear_bit(MESH_WORK_MBSS_CHANGED, &ifmsh->wrkq_flags)) |
1436 | mesh_bss_info_changed(sdata); | |
ecccd072 TP |
1437 | out: |
1438 | sdata_unlock(sdata); | |
472dbc45 JB |
1439 | } |
1440 | ||
472dbc45 | 1441 | |
902acc78 JB |
1442 | void ieee80211_mesh_init_sdata(struct ieee80211_sub_if_data *sdata) |
1443 | { | |
472dbc45 | 1444 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
ad2d223a | 1445 | static u8 zero_addr[ETH_ALEN] = {}; |
472dbc45 | 1446 | |
34f11cd3 KC |
1447 | timer_setup(&ifmsh->housekeeping_timer, |
1448 | ieee80211_mesh_housekeeping_timer, 0); | |
472dbc45 | 1449 | |
472dbc45 | 1450 | ifmsh->accepting_plinks = true; |
472dbc45 | 1451 | atomic_set(&ifmsh->mpaths, 0); |
f698d856 | 1452 | mesh_rmc_init(sdata); |
472dbc45 | 1453 | ifmsh->last_preq = jiffies; |
dca7e943 | 1454 | ifmsh->next_perr = jiffies; |
0cb4d4dc | 1455 | ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_NONE; |
902acc78 JB |
1456 | /* Allocate all mesh structures when creating the first mesh interface. */ |
1457 | if (!mesh_allocated) | |
1458 | ieee80211s_init(); | |
2bdaf386 BC |
1459 | |
1460 | mesh_pathtbl_init(sdata); | |
1461 | ||
34f11cd3 KC |
1462 | timer_setup(&ifmsh->mesh_path_timer, ieee80211_mesh_path_timer, 0); |
1463 | timer_setup(&ifmsh->mesh_path_root_timer, | |
1464 | ieee80211_mesh_path_root_timer, 0); | |
472dbc45 | 1465 | INIT_LIST_HEAD(&ifmsh->preq_queue.list); |
3f52b7e3 | 1466 | skb_queue_head_init(&ifmsh->ps.bc_buf); |
472dbc45 | 1467 | spin_lock_init(&ifmsh->mesh_preq_queue_lock); |
dbf498fb | 1468 | spin_lock_init(&ifmsh->sync_offset_lock); |
2b5e1967 | 1469 | RCU_INIT_POINTER(ifmsh->beacon, NULL); |
ad2d223a JB |
1470 | |
1471 | sdata->vif.bss_conf.bssid = zero_addr; | |
472dbc45 | 1472 | } |
0371a08f BC |
1473 | |
1474 | void ieee80211_mesh_teardown_sdata(struct ieee80211_sub_if_data *sdata) | |
1475 | { | |
1476 | mesh_rmc_free(sdata); | |
1477 | mesh_pathtbl_unregister(sdata); | |
1478 | } |