Commit | Line | Data |
---|---|---|
2e3c8736 | 1 | /* |
264d9b7d | 2 | * Copyright (c) 2008, 2009 open80211s Ltd. |
2e3c8736 LCC |
3 | * Authors: Luis Carlos Cobo <luisca@cozybit.com> |
4 | * Javier Cardona <javier@cozybit.com> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 as | |
8 | * published by the Free Software Foundation. | |
9 | */ | |
10 | ||
5a0e3ad6 | 11 | #include <linux/slab.h> |
51ceddad | 12 | #include <asm/unaligned.h> |
2e3c8736 LCC |
13 | #include "ieee80211_i.h" |
14 | #include "mesh.h" | |
b8456a14 | 15 | #include "driver-ops.h" |
2e3c8736 | 16 | |
bf7cd94d | 17 | static int mesh_allocated; |
2e3c8736 LCC |
18 | static struct kmem_cache *rm_cache; |
19 | ||
25d49e4d TP |
20 | bool mesh_action_is_path_sel(struct ieee80211_mgmt *mgmt) |
21 | { | |
22 | return (mgmt->u.action.u.mesh_action.action_code == | |
23 | WLAN_MESH_ACTION_HWMP_PATH_SELECTION); | |
24 | } | |
25d49e4d | 25 | |
2e3c8736 LCC |
26 | void ieee80211s_init(void) |
27 | { | |
2e3c8736 LCC |
28 | mesh_allocated = 1; |
29 | rm_cache = kmem_cache_create("mesh_rmc", sizeof(struct rmc_entry), | |
30 | 0, 0, NULL); | |
31 | } | |
32 | ||
33 | void ieee80211s_stop(void) | |
34 | { | |
bf7cd94d JB |
35 | if (!mesh_allocated) |
36 | return; | |
2e3c8736 LCC |
37 | kmem_cache_destroy(rm_cache); |
38 | } | |
39 | ||
472dbc45 JB |
40 | static void ieee80211_mesh_housekeeping_timer(unsigned long data) |
41 | { | |
42 | struct ieee80211_sub_if_data *sdata = (void *) data; | |
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 | |
64592c8f | 48 | ieee80211_queue_work(&local->hw, &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. | |
59 | */ | |
f743ff49 TP |
60 | bool mesh_matches_local(struct ieee80211_sub_if_data *sdata, |
61 | struct ieee802_11_elems *ie) | |
2e3c8736 | 62 | { |
472dbc45 | 63 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
f743ff49 | 64 | u32 basic_rates = 0; |
4bf88530 | 65 | struct cfg80211_chan_def sta_chan_def; |
2e3c8736 | 66 | |
2e3c8736 LCC |
67 | /* |
68 | * As support for each feature is added, check for matching | |
69 | * - On mesh config capabilities | |
70 | * - Power Save Support En | |
71 | * - Sync support enabled | |
72 | * - Sync support active | |
73 | * - Sync support required from peer | |
74 | * - MDA enabled | |
75 | * - Power management control on fc | |
76 | */ | |
739522ba TP |
77 | if (!(ifmsh->mesh_id_len == ie->mesh_id_len && |
78 | memcmp(ifmsh->mesh_id, ie->mesh_id, ie->mesh_id_len) == 0 && | |
79 | (ifmsh->mesh_pp_id == ie->mesh_config->meshconf_psel) && | |
80 | (ifmsh->mesh_pm_id == ie->mesh_config->meshconf_pmetric) && | |
81 | (ifmsh->mesh_cc_id == ie->mesh_config->meshconf_congest) && | |
82 | (ifmsh->mesh_sp_id == ie->mesh_config->meshconf_synch) && | |
83 | (ifmsh->mesh_auth_id == ie->mesh_config->meshconf_auth))) | |
bf7cd94d | 84 | return false; |
739522ba | 85 | |
2103dec1 | 86 | ieee80211_sta_get_rates(sdata, ie, ieee80211_get_sdata_band(sdata), |
f743ff49 TP |
87 | &basic_rates); |
88 | ||
fe40cb62 | 89 | if (sdata->vif.bss_conf.basic_rates != basic_rates) |
bf7cd94d | 90 | return false; |
fe40cb62 | 91 | |
8ac3c704 JB |
92 | cfg80211_chandef_create(&sta_chan_def, sdata->vif.bss_conf.chandef.chan, |
93 | NL80211_CHAN_NO_HT); | |
94 | ieee80211_chandef_ht_oper(ie->ht_operation, &sta_chan_def); | |
95 | ieee80211_chandef_vht_oper(ie->vht_operation, &sta_chan_def); | |
c85fb53c | 96 | |
4bf88530 JB |
97 | if (!cfg80211_chandef_compatible(&sdata->vif.bss_conf.chandef, |
98 | &sta_chan_def)) | |
bf7cd94d | 99 | return false; |
2e3c8736 | 100 | |
739522ba | 101 | return true; |
2e3c8736 LCC |
102 | } |
103 | ||
104 | /** | |
105 | * mesh_peer_accepts_plinks - check if an mp is willing to establish peer links | |
106 | * | |
107 | * @ie: information elements of a management frame from the mesh peer | |
2e3c8736 | 108 | */ |
f698d856 | 109 | bool mesh_peer_accepts_plinks(struct ieee802_11_elems *ie) |
2e3c8736 | 110 | { |
136cfa28 | 111 | return (ie->mesh_config->meshconf_cap & |
bf7cd94d | 112 | IEEE80211_MESHCONF_CAPAB_ACCEPT_PLINKS) != 0; |
2e3c8736 LCC |
113 | } |
114 | ||
115 | /** | |
2c53040f | 116 | * mesh_accept_plinks_update - update accepting_plink in local mesh beacons |
2e3c8736 | 117 | * |
d0709a65 | 118 | * @sdata: mesh interface in which mesh beacons are going to be updated |
df323818 MP |
119 | * |
120 | * Returns: beacon changed flag if the beacon content changed. | |
2e3c8736 | 121 | */ |
df323818 | 122 | u32 mesh_accept_plinks_update(struct ieee80211_sub_if_data *sdata) |
2e3c8736 | 123 | { |
2e3c8736 | 124 | bool free_plinks; |
df323818 | 125 | u32 changed = 0; |
2e3c8736 LCC |
126 | |
127 | /* In case mesh_plink_free_count > 0 and mesh_plinktbl_capacity == 0, | |
128 | * the mesh interface might be able to establish plinks with peers that | |
b4e08ea1 LCC |
129 | * are already on the table but are not on PLINK_ESTAB state. However, |
130 | * in general the mesh interface is not accepting peer link requests | |
131 | * from new peers, and that must be reflected in the beacon | |
2e3c8736 LCC |
132 | */ |
133 | free_plinks = mesh_plink_availables(sdata); | |
134 | ||
df323818 MP |
135 | if (free_plinks != sdata->u.mesh.accepting_plinks) { |
136 | sdata->u.mesh.accepting_plinks = free_plinks; | |
137 | changed = BSS_CHANGED_BEACON; | |
138 | } | |
139 | ||
140 | return changed; | |
2e3c8736 LCC |
141 | } |
142 | ||
45b5028e TP |
143 | /* |
144 | * mesh_sta_cleanup - clean up any mesh sta state | |
145 | * | |
146 | * @sta: mesh sta to clean up. | |
147 | */ | |
148 | void mesh_sta_cleanup(struct sta_info *sta) | |
149 | { | |
150 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
efc401f4 | 151 | u32 changed = mesh_plink_deactivate(sta); |
fe7a7c57 | 152 | |
f81a9ded | 153 | if (changed) |
2b5e1967 | 154 | ieee80211_mbss_info_change_notify(sdata, changed); |
45b5028e TP |
155 | } |
156 | ||
f698d856 | 157 | int mesh_rmc_init(struct ieee80211_sub_if_data *sdata) |
2e3c8736 | 158 | { |
2e3c8736 LCC |
159 | int i; |
160 | ||
472dbc45 JB |
161 | sdata->u.mesh.rmc = kmalloc(sizeof(struct mesh_rmc), GFP_KERNEL); |
162 | if (!sdata->u.mesh.rmc) | |
2e3c8736 | 163 | return -ENOMEM; |
472dbc45 | 164 | sdata->u.mesh.rmc->idx_mask = RMC_BUCKETS - 1; |
2e3c8736 | 165 | for (i = 0; i < RMC_BUCKETS; i++) |
47a0489c | 166 | INIT_HLIST_HEAD(&sdata->u.mesh.rmc->bucket[i]); |
2e3c8736 LCC |
167 | return 0; |
168 | } | |
169 | ||
f698d856 | 170 | void mesh_rmc_free(struct ieee80211_sub_if_data *sdata) |
2e3c8736 | 171 | { |
472dbc45 | 172 | struct mesh_rmc *rmc = sdata->u.mesh.rmc; |
47a0489c BC |
173 | struct rmc_entry *p; |
174 | struct hlist_node *n; | |
2e3c8736 LCC |
175 | int i; |
176 | ||
472dbc45 | 177 | if (!sdata->u.mesh.rmc) |
2e3c8736 LCC |
178 | return; |
179 | ||
bf7cd94d | 180 | for (i = 0; i < RMC_BUCKETS; i++) { |
47a0489c BC |
181 | hlist_for_each_entry_safe(p, n, &rmc->bucket[i], list) { |
182 | hlist_del(&p->list); | |
2e3c8736 LCC |
183 | kmem_cache_free(rm_cache, p); |
184 | } | |
bf7cd94d | 185 | } |
2e3c8736 LCC |
186 | |
187 | kfree(rmc); | |
472dbc45 | 188 | sdata->u.mesh.rmc = NULL; |
2e3c8736 LCC |
189 | } |
190 | ||
191 | /** | |
192 | * mesh_rmc_check - Check frame in recent multicast cache and add if absent. | |
193 | * | |
bf7cd94d | 194 | * @sdata: interface |
2e3c8736 LCC |
195 | * @sa: source address |
196 | * @mesh_hdr: mesh_header | |
197 | * | |
198 | * Returns: 0 if the frame is not in the cache, nonzero otherwise. | |
199 | * | |
200 | * Checks using the source address and the mesh sequence number if we have | |
201 | * received this frame lately. If the frame is not in the cache, it is added to | |
202 | * it. | |
203 | */ | |
bf7cd94d JB |
204 | int mesh_rmc_check(struct ieee80211_sub_if_data *sdata, |
205 | const u8 *sa, struct ieee80211s_hdr *mesh_hdr) | |
2e3c8736 | 206 | { |
472dbc45 | 207 | struct mesh_rmc *rmc = sdata->u.mesh.rmc; |
2e3c8736 LCC |
208 | u32 seqnum = 0; |
209 | int entries = 0; | |
210 | u8 idx; | |
47a0489c BC |
211 | struct rmc_entry *p; |
212 | struct hlist_node *n; | |
2e3c8736 | 213 | |
0aa7fabb BC |
214 | if (!rmc) |
215 | return -1; | |
216 | ||
2e3c8736 | 217 | /* Don't care about endianness since only match matters */ |
51ceddad LCC |
218 | memcpy(&seqnum, &mesh_hdr->seqnum, sizeof(mesh_hdr->seqnum)); |
219 | idx = le32_to_cpu(mesh_hdr->seqnum) & rmc->idx_mask; | |
47a0489c | 220 | hlist_for_each_entry_safe(p, n, &rmc->bucket[idx], list) { |
2e3c8736 LCC |
221 | ++entries; |
222 | if (time_after(jiffies, p->exp_time) || | |
bf7cd94d | 223 | entries == RMC_QUEUE_MAX_LEN) { |
47a0489c | 224 | hlist_del(&p->list); |
2e3c8736 LCC |
225 | kmem_cache_free(rm_cache, p); |
226 | --entries; | |
bf7cd94d | 227 | } else if ((seqnum == p->seqnum) && ether_addr_equal(sa, p->sa)) |
2e3c8736 LCC |
228 | return -1; |
229 | } | |
230 | ||
231 | p = kmem_cache_alloc(rm_cache, GFP_ATOMIC); | |
d15b8459 | 232 | if (!p) |
2e3c8736 | 233 | return 0; |
d15b8459 | 234 | |
2e3c8736 LCC |
235 | p->seqnum = seqnum; |
236 | p->exp_time = jiffies + RMC_TIMEOUT; | |
237 | memcpy(p->sa, sa, ETH_ALEN); | |
47a0489c | 238 | hlist_add_head(&p->list, &rmc->bucket[idx]); |
2e3c8736 LCC |
239 | return 0; |
240 | } | |
241 | ||
bf7cd94d JB |
242 | int mesh_add_meshconf_ie(struct ieee80211_sub_if_data *sdata, |
243 | struct sk_buff *skb) | |
082ebb0c TP |
244 | { |
245 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
246 | u8 *pos, neighbors; | |
247 | u8 meshconf_len = sizeof(struct ieee80211_meshconf_ie); | |
248 | ||
249 | if (skb_tailroom(skb) < 2 + meshconf_len) | |
250 | return -ENOMEM; | |
251 | ||
252 | pos = skb_put(skb, 2 + meshconf_len); | |
253 | *pos++ = WLAN_EID_MESH_CONFIG; | |
254 | *pos++ = meshconf_len; | |
255 | ||
43552be1 TP |
256 | /* save a pointer for quick updates in pre-tbtt */ |
257 | ifmsh->meshconf_offset = pos - skb->data; | |
258 | ||
082ebb0c TP |
259 | /* Active path selection protocol ID */ |
260 | *pos++ = ifmsh->mesh_pp_id; | |
261 | /* Active path selection metric ID */ | |
262 | *pos++ = ifmsh->mesh_pm_id; | |
263 | /* Congestion control mode identifier */ | |
264 | *pos++ = ifmsh->mesh_cc_id; | |
265 | /* Synchronization protocol identifier */ | |
266 | *pos++ = ifmsh->mesh_sp_id; | |
267 | /* Authentication Protocol identifier */ | |
268 | *pos++ = ifmsh->mesh_auth_id; | |
269 | /* Mesh Formation Info - number of neighbors */ | |
1258d976 | 270 | neighbors = atomic_read(&ifmsh->estab_plinks); |
e05ecccd | 271 | neighbors = min_t(int, neighbors, IEEE80211_MAX_MESH_PEERINGS); |
082ebb0c TP |
272 | *pos++ = neighbors << 1; |
273 | /* Mesh capability */ | |
b60e527a CYY |
274 | *pos = 0x00; |
275 | *pos |= ifmsh->mshcfg.dot11MeshForwarding ? | |
276 | IEEE80211_MESHCONF_CAPAB_FORWARDING : 0x00; | |
dbf498fb | 277 | *pos |= ifmsh->accepting_plinks ? |
bf7cd94d | 278 | IEEE80211_MESHCONF_CAPAB_ACCEPT_PLINKS : 0x00; |
3f52b7e3 MP |
279 | /* Mesh PS mode. See IEEE802.11-2012 8.4.2.100.8 */ |
280 | *pos |= ifmsh->ps_peers_deep_sleep ? | |
bf7cd94d | 281 | IEEE80211_MESHCONF_CAPAB_POWER_SAVE_LEVEL : 0x00; |
082ebb0c TP |
282 | return 0; |
283 | } | |
284 | ||
bf7cd94d | 285 | int mesh_add_meshid_ie(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb) |
082ebb0c TP |
286 | { |
287 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
288 | u8 *pos; | |
289 | ||
290 | if (skb_tailroom(skb) < 2 + ifmsh->mesh_id_len) | |
291 | return -ENOMEM; | |
292 | ||
293 | pos = skb_put(skb, 2 + ifmsh->mesh_id_len); | |
294 | *pos++ = WLAN_EID_MESH_ID; | |
295 | *pos++ = ifmsh->mesh_id_len; | |
296 | if (ifmsh->mesh_id_len) | |
297 | memcpy(pos, ifmsh->mesh_id, ifmsh->mesh_id_len); | |
298 | ||
299 | return 0; | |
300 | } | |
301 | ||
bf7cd94d JB |
302 | static int mesh_add_awake_window_ie(struct ieee80211_sub_if_data *sdata, |
303 | struct sk_buff *skb) | |
3f52b7e3 MP |
304 | { |
305 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
306 | u8 *pos; | |
307 | ||
308 | /* see IEEE802.11-2012 13.14.6 */ | |
309 | if (ifmsh->ps_peers_light_sleep == 0 && | |
310 | ifmsh->ps_peers_deep_sleep == 0 && | |
311 | ifmsh->nonpeer_pm == NL80211_MESH_POWER_ACTIVE) | |
312 | return 0; | |
313 | ||
314 | if (skb_tailroom(skb) < 4) | |
315 | return -ENOMEM; | |
316 | ||
317 | pos = skb_put(skb, 2 + 2); | |
318 | *pos++ = WLAN_EID_MESH_AWAKE_WINDOW; | |
319 | *pos++ = 2; | |
320 | put_unaligned_le16(ifmsh->mshcfg.dot11MeshAwakeWindowDuration, pos); | |
321 | ||
322 | return 0; | |
323 | } | |
324 | ||
bf7cd94d JB |
325 | int mesh_add_vendor_ies(struct ieee80211_sub_if_data *sdata, |
326 | struct sk_buff *skb) | |
082ebb0c TP |
327 | { |
328 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
329 | u8 offset, len; | |
330 | const u8 *data; | |
331 | ||
332 | if (!ifmsh->ie || !ifmsh->ie_len) | |
333 | return 0; | |
334 | ||
335 | /* fast-forward to vendor IEs */ | |
336 | offset = ieee80211_ie_split_vendor(ifmsh->ie, ifmsh->ie_len, 0); | |
337 | ||
da7061c8 | 338 | if (offset < ifmsh->ie_len) { |
082ebb0c TP |
339 | len = ifmsh->ie_len - offset; |
340 | data = ifmsh->ie + offset; | |
341 | if (skb_tailroom(skb) < len) | |
342 | return -ENOMEM; | |
343 | memcpy(skb_put(skb, len), data, len); | |
344 | } | |
345 | ||
346 | return 0; | |
347 | } | |
348 | ||
bf7cd94d | 349 | int mesh_add_rsn_ie(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb) |
082ebb0c TP |
350 | { |
351 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
352 | u8 len = 0; | |
353 | const u8 *data; | |
354 | ||
355 | if (!ifmsh->ie || !ifmsh->ie_len) | |
356 | return 0; | |
357 | ||
358 | /* find RSN IE */ | |
a40a8c17 BC |
359 | data = cfg80211_find_ie(WLAN_EID_RSN, ifmsh->ie, ifmsh->ie_len); |
360 | if (!data) | |
361 | return 0; | |
082ebb0c | 362 | |
a40a8c17 BC |
363 | len = data[1] + 2; |
364 | ||
365 | if (skb_tailroom(skb) < len) | |
366 | return -ENOMEM; | |
367 | memcpy(skb_put(skb, len), data, len); | |
082ebb0c TP |
368 | |
369 | return 0; | |
370 | } | |
371 | ||
bf7cd94d JB |
372 | static int mesh_add_ds_params_ie(struct ieee80211_sub_if_data *sdata, |
373 | struct sk_buff *skb) | |
082ebb0c | 374 | { |
55de908a JB |
375 | struct ieee80211_chanctx_conf *chanctx_conf; |
376 | struct ieee80211_channel *chan; | |
082ebb0c | 377 | u8 *pos; |
2e3c8736 | 378 | |
082ebb0c TP |
379 | if (skb_tailroom(skb) < 3) |
380 | return -ENOMEM; | |
381 | ||
55de908a JB |
382 | rcu_read_lock(); |
383 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
384 | if (WARN_ON(!chanctx_conf)) { | |
385 | rcu_read_unlock(); | |
386 | return -EINVAL; | |
387 | } | |
4bf88530 | 388 | chan = chanctx_conf->def.chan; |
55de908a JB |
389 | rcu_read_unlock(); |
390 | ||
601513aa ET |
391 | pos = skb_put(skb, 2 + 1); |
392 | *pos++ = WLAN_EID_DS_PARAMS; | |
393 | *pos++ = 1; | |
394 | *pos++ = ieee80211_frequency_to_channel(chan->center_freq); | |
be125c60 | 395 | |
082ebb0c | 396 | return 0; |
2e3c8736 LCC |
397 | } |
398 | ||
bf7cd94d JB |
399 | int mesh_add_ht_cap_ie(struct ieee80211_sub_if_data *sdata, |
400 | struct sk_buff *skb) | |
176f3608 TP |
401 | { |
402 | struct ieee80211_local *local = sdata->local; | |
57fbcce3 | 403 | enum nl80211_band band = ieee80211_get_sdata_band(sdata); |
176f3608 TP |
404 | struct ieee80211_supported_band *sband; |
405 | u8 *pos; | |
406 | ||
55de908a | 407 | sband = local->hw.wiphy->bands[band]; |
176f3608 | 408 | if (!sband->ht_cap.ht_supported || |
0418a445 SW |
409 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT || |
410 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 || | |
411 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10) | |
176f3608 TP |
412 | return 0; |
413 | ||
414 | if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_ht_cap)) | |
415 | return -ENOMEM; | |
416 | ||
417 | pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_cap)); | |
ef96a842 | 418 | ieee80211_ie_build_ht_cap(pos, &sband->ht_cap, sband->ht_cap.cap); |
176f3608 TP |
419 | |
420 | return 0; | |
421 | } | |
422 | ||
bf7cd94d JB |
423 | int mesh_add_ht_oper_ie(struct ieee80211_sub_if_data *sdata, |
424 | struct sk_buff *skb) | |
176f3608 TP |
425 | { |
426 | struct ieee80211_local *local = sdata->local; | |
55de908a JB |
427 | struct ieee80211_chanctx_conf *chanctx_conf; |
428 | struct ieee80211_channel *channel; | |
55de908a JB |
429 | struct ieee80211_supported_band *sband; |
430 | struct ieee80211_sta_ht_cap *ht_cap; | |
176f3608 TP |
431 | u8 *pos; |
432 | ||
55de908a JB |
433 | rcu_read_lock(); |
434 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
435 | if (WARN_ON(!chanctx_conf)) { | |
436 | rcu_read_unlock(); | |
437 | return -EINVAL; | |
438 | } | |
4bf88530 | 439 | channel = chanctx_conf->def.chan; |
55de908a JB |
440 | rcu_read_unlock(); |
441 | ||
442 | sband = local->hw.wiphy->bands[channel->band]; | |
443 | ht_cap = &sband->ht_cap; | |
444 | ||
c85fb53c BC |
445 | if (!ht_cap->ht_supported || |
446 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT || | |
447 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 || | |
448 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10) | |
176f3608 TP |
449 | return 0; |
450 | ||
074d46d1 | 451 | if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_ht_operation)) |
176f3608 TP |
452 | return -ENOMEM; |
453 | ||
074d46d1 | 454 | pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_operation)); |
4bf88530 | 455 | ieee80211_ie_build_ht_oper(pos, ht_cap, &sdata->vif.bss_conf.chandef, |
57f255f5 AN |
456 | sdata->vif.bss_conf.ht_operation_mode, |
457 | false); | |
176f3608 TP |
458 | |
459 | return 0; | |
460 | } | |
bf7cd94d | 461 | |
c85fb53c BC |
462 | int mesh_add_vht_cap_ie(struct ieee80211_sub_if_data *sdata, |
463 | struct sk_buff *skb) | |
464 | { | |
465 | struct ieee80211_local *local = sdata->local; | |
57fbcce3 | 466 | enum nl80211_band band = ieee80211_get_sdata_band(sdata); |
c85fb53c BC |
467 | struct ieee80211_supported_band *sband; |
468 | u8 *pos; | |
469 | ||
470 | sband = local->hw.wiphy->bands[band]; | |
471 | if (!sband->vht_cap.vht_supported || | |
472 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT || | |
473 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 || | |
474 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10) | |
475 | return 0; | |
476 | ||
477 | if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_vht_cap)) | |
478 | return -ENOMEM; | |
479 | ||
480 | pos = skb_put(skb, 2 + sizeof(struct ieee80211_vht_cap)); | |
481 | ieee80211_ie_build_vht_cap(pos, &sband->vht_cap, sband->vht_cap.cap); | |
482 | ||
483 | return 0; | |
484 | } | |
485 | ||
486 | int mesh_add_vht_oper_ie(struct ieee80211_sub_if_data *sdata, | |
487 | struct sk_buff *skb) | |
488 | { | |
489 | struct ieee80211_local *local = sdata->local; | |
490 | struct ieee80211_chanctx_conf *chanctx_conf; | |
491 | struct ieee80211_channel *channel; | |
492 | struct ieee80211_supported_band *sband; | |
493 | struct ieee80211_sta_vht_cap *vht_cap; | |
494 | u8 *pos; | |
495 | ||
496 | rcu_read_lock(); | |
497 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
498 | if (WARN_ON(!chanctx_conf)) { | |
499 | rcu_read_unlock(); | |
500 | return -EINVAL; | |
501 | } | |
502 | channel = chanctx_conf->def.chan; | |
503 | rcu_read_unlock(); | |
504 | ||
505 | sband = local->hw.wiphy->bands[channel->band]; | |
506 | vht_cap = &sband->vht_cap; | |
507 | ||
508 | if (!vht_cap->vht_supported || | |
509 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT || | |
510 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 || | |
511 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10) | |
512 | return 0; | |
513 | ||
514 | if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_vht_operation)) | |
515 | return -ENOMEM; | |
516 | ||
517 | pos = skb_put(skb, 2 + sizeof(struct ieee80211_vht_operation)); | |
518 | ieee80211_ie_build_vht_oper(pos, vht_cap, | |
519 | &sdata->vif.bss_conf.chandef); | |
520 | ||
521 | return 0; | |
522 | } | |
523 | ||
2e3c8736 LCC |
524 | static void ieee80211_mesh_path_timer(unsigned long data) |
525 | { | |
526 | struct ieee80211_sub_if_data *sdata = | |
527 | (struct ieee80211_sub_if_data *) data; | |
5bb644a0 | 528 | |
690205f1 | 529 | ieee80211_queue_work(&sdata->local->hw, &sdata->work); |
2e3c8736 LCC |
530 | } |
531 | ||
e304bfd3 RP |
532 | static void ieee80211_mesh_path_root_timer(unsigned long data) |
533 | { | |
534 | struct ieee80211_sub_if_data *sdata = | |
535 | (struct ieee80211_sub_if_data *) data; | |
536 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
e304bfd3 RP |
537 | |
538 | set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); | |
539 | ||
690205f1 | 540 | ieee80211_queue_work(&sdata->local->hw, &sdata->work); |
e304bfd3 RP |
541 | } |
542 | ||
63c5723b RP |
543 | void ieee80211_mesh_root_setup(struct ieee80211_if_mesh *ifmsh) |
544 | { | |
dbb912cd | 545 | if (ifmsh->mshcfg.dot11MeshHWMPRootMode > IEEE80211_ROOTMODE_ROOT) |
63c5723b RP |
546 | set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); |
547 | else { | |
548 | clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); | |
549 | /* stop running timer */ | |
550 | del_timer_sync(&ifmsh->mesh_path_root_timer); | |
551 | } | |
552 | } | |
553 | ||
3c5772a5 JC |
554 | /** |
555 | * ieee80211_fill_mesh_addresses - fill addresses of a locally originated mesh frame | |
bf7cd94d | 556 | * @hdr: 802.11 frame header |
3c5772a5 JC |
557 | * @fc: frame control field |
558 | * @meshda: destination address in the mesh | |
559 | * @meshsa: source address address in the mesh. Same as TA, as frame is | |
560 | * locally originated. | |
561 | * | |
562 | * Return the length of the 802.11 (does not include a mesh control header) | |
563 | */ | |
15ff6365 JB |
564 | int ieee80211_fill_mesh_addresses(struct ieee80211_hdr *hdr, __le16 *fc, |
565 | const u8 *meshda, const u8 *meshsa) | |
566 | { | |
3c5772a5 JC |
567 | if (is_multicast_ether_addr(meshda)) { |
568 | *fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS); | |
569 | /* DA TA SA */ | |
570 | memcpy(hdr->addr1, meshda, ETH_ALEN); | |
571 | memcpy(hdr->addr2, meshsa, ETH_ALEN); | |
572 | memcpy(hdr->addr3, meshsa, ETH_ALEN); | |
573 | return 24; | |
574 | } else { | |
2154c81c | 575 | *fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); |
3c5772a5 | 576 | /* RA TA DA SA */ |
c84a67a2 | 577 | eth_zero_addr(hdr->addr1); /* RA is resolved later */ |
3c5772a5 JC |
578 | memcpy(hdr->addr2, meshsa, ETH_ALEN); |
579 | memcpy(hdr->addr3, meshda, ETH_ALEN); | |
580 | memcpy(hdr->addr4, meshsa, ETH_ALEN); | |
581 | return 30; | |
582 | } | |
583 | } | |
584 | ||
902acc78 JB |
585 | /** |
586 | * ieee80211_new_mesh_header - create a new mesh header | |
902acc78 | 587 | * @sdata: mesh interface to be used |
bf7cd94d | 588 | * @meshhdr: uninitialized mesh header |
61ad5394 JC |
589 | * @addr4or5: 1st address in the ae header, which may correspond to address 4 |
590 | * (if addr6 is NULL) or address 5 (if addr6 is present). It may | |
591 | * be NULL. | |
592 | * @addr6: 2nd address in the ae header, which corresponds to addr6 of the | |
593 | * mesh frame | |
902acc78 JB |
594 | * |
595 | * Return the header length. | |
596 | */ | |
5edfcee5 AH |
597 | unsigned int ieee80211_new_mesh_header(struct ieee80211_sub_if_data *sdata, |
598 | struct ieee80211s_hdr *meshhdr, | |
599 | const char *addr4or5, const char *addr6) | |
902acc78 | 600 | { |
bf7cd94d JB |
601 | if (WARN_ON(!addr4or5 && addr6)) |
602 | return 0; | |
603 | ||
0c3cee72 | 604 | memset(meshhdr, 0, sizeof(*meshhdr)); |
bf7cd94d | 605 | |
472dbc45 | 606 | meshhdr->ttl = sdata->u.mesh.mshcfg.dot11MeshTTL; |
bf7cd94d JB |
607 | |
608 | /* FIXME: racy -- TX on multiple queues can be concurrent */ | |
472dbc45 JB |
609 | put_unaligned(cpu_to_le32(sdata->u.mesh.mesh_seqnum), &meshhdr->seqnum); |
610 | sdata->u.mesh.mesh_seqnum++; | |
bf7cd94d | 611 | |
61ad5394 | 612 | if (addr4or5 && !addr6) { |
3c5772a5 | 613 | meshhdr->flags |= MESH_FLAGS_AE_A4; |
61ad5394 | 614 | memcpy(meshhdr->eaddr1, addr4or5, ETH_ALEN); |
bf7cd94d | 615 | return 2 * ETH_ALEN; |
61ad5394 | 616 | } else if (addr4or5 && addr6) { |
3c5772a5 | 617 | meshhdr->flags |= MESH_FLAGS_AE_A5_A6; |
61ad5394 JC |
618 | memcpy(meshhdr->eaddr1, addr4or5, ETH_ALEN); |
619 | memcpy(meshhdr->eaddr2, addr6, ETH_ALEN); | |
bf7cd94d | 620 | return 3 * ETH_ALEN; |
3c5772a5 | 621 | } |
bf7cd94d JB |
622 | |
623 | return ETH_ALEN; | |
902acc78 JB |
624 | } |
625 | ||
bf7cd94d | 626 | static void ieee80211_mesh_housekeeping(struct ieee80211_sub_if_data *sdata) |
472dbc45 | 627 | { |
bf7cd94d | 628 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
df323818 | 629 | u32 changed; |
472dbc45 | 630 | |
31f909a2 MH |
631 | if (ifmsh->mshcfg.plink_timeout > 0) |
632 | ieee80211_sta_expire(sdata, ifmsh->mshcfg.plink_timeout * HZ); | |
472dbc45 JB |
633 | mesh_path_expire(sdata); |
634 | ||
df323818 | 635 | changed = mesh_accept_plinks_update(sdata); |
2b5e1967 | 636 | ieee80211_mbss_info_change_notify(sdata, changed); |
472dbc45 | 637 | |
472dbc45 | 638 | mod_timer(&ifmsh->housekeeping_timer, |
bf7cd94d JB |
639 | round_jiffies(jiffies + |
640 | IEEE80211_MESH_HOUSEKEEPING_INTERVAL)); | |
472dbc45 JB |
641 | } |
642 | ||
e304bfd3 RP |
643 | static void ieee80211_mesh_rootpath(struct ieee80211_sub_if_data *sdata) |
644 | { | |
645 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
a69cc44f | 646 | u32 interval; |
e304bfd3 RP |
647 | |
648 | mesh_path_tx_root_frame(sdata); | |
a69cc44f CYY |
649 | |
650 | if (ifmsh->mshcfg.dot11MeshHWMPRootMode == IEEE80211_PROACTIVE_RANN) | |
651 | interval = ifmsh->mshcfg.dot11MeshHWMPRannInterval; | |
652 | else | |
653 | interval = ifmsh->mshcfg.dot11MeshHWMProotInterval; | |
654 | ||
e304bfd3 | 655 | mod_timer(&ifmsh->mesh_path_root_timer, |
a69cc44f | 656 | round_jiffies(TU_TO_EXP_TIME(interval))); |
e304bfd3 RP |
657 | } |
658 | ||
2b5e1967 TP |
659 | static int |
660 | ieee80211_mesh_build_beacon(struct ieee80211_if_mesh *ifmsh) | |
661 | { | |
662 | struct beacon_data *bcn; | |
663 | int head_len, tail_len; | |
664 | struct sk_buff *skb; | |
665 | struct ieee80211_mgmt *mgmt; | |
666 | struct ieee80211_chanctx_conf *chanctx_conf; | |
b8456a14 | 667 | struct mesh_csa_settings *csa; |
57fbcce3 | 668 | enum nl80211_band band; |
2b5e1967 TP |
669 | u8 *pos; |
670 | struct ieee80211_sub_if_data *sdata; | |
671 | int hdr_len = offsetof(struct ieee80211_mgmt, u.beacon) + | |
672 | sizeof(mgmt->u.beacon); | |
673 | ||
674 | sdata = container_of(ifmsh, struct ieee80211_sub_if_data, u.mesh); | |
675 | rcu_read_lock(); | |
676 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
677 | band = chanctx_conf->def.chan->band; | |
678 | rcu_read_unlock(); | |
679 | ||
680 | head_len = hdr_len + | |
681 | 2 + /* NULL SSID */ | |
b8456a14 CYY |
682 | /* Channel Switch Announcement */ |
683 | 2 + sizeof(struct ieee80211_channel_sw_ie) + | |
684 | /* Mesh Channel Swith Parameters */ | |
685 | 2 + sizeof(struct ieee80211_mesh_chansw_params_ie) + | |
2b5e1967 TP |
686 | 2 + 8 + /* supported rates */ |
687 | 2 + 3; /* DS params */ | |
688 | tail_len = 2 + (IEEE80211_MAX_SUPP_RATES - 8) + | |
689 | 2 + sizeof(struct ieee80211_ht_cap) + | |
690 | 2 + sizeof(struct ieee80211_ht_operation) + | |
691 | 2 + ifmsh->mesh_id_len + | |
692 | 2 + sizeof(struct ieee80211_meshconf_ie) + | |
693 | 2 + sizeof(__le16) + /* awake window */ | |
c85fb53c BC |
694 | 2 + sizeof(struct ieee80211_vht_cap) + |
695 | 2 + sizeof(struct ieee80211_vht_operation) + | |
2b5e1967 TP |
696 | ifmsh->ie_len; |
697 | ||
698 | bcn = kzalloc(sizeof(*bcn) + head_len + tail_len, GFP_KERNEL); | |
699 | /* need an skb for IE builders to operate on */ | |
700 | skb = dev_alloc_skb(max(head_len, tail_len)); | |
701 | ||
702 | if (!bcn || !skb) | |
703 | goto out_free; | |
704 | ||
705 | /* | |
706 | * pointers go into the block we allocated, | |
707 | * memory is | beacon_data | head | tail | | |
708 | */ | |
709 | bcn->head = ((u8 *) bcn) + sizeof(*bcn); | |
710 | ||
711 | /* fill in the head */ | |
712 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, hdr_len); | |
713 | memset(mgmt, 0, hdr_len); | |
714 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
715 | IEEE80211_STYPE_BEACON); | |
716 | eth_broadcast_addr(mgmt->da); | |
717 | memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); | |
718 | memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN); | |
719 | ieee80211_mps_set_frame_flags(sdata, NULL, (void *) mgmt); | |
720 | mgmt->u.beacon.beacon_int = | |
721 | cpu_to_le16(sdata->vif.bss_conf.beacon_int); | |
722 | mgmt->u.beacon.capab_info |= cpu_to_le16( | |
723 | sdata->u.mesh.security ? WLAN_CAPABILITY_PRIVACY : 0); | |
724 | ||
725 | pos = skb_put(skb, 2); | |
726 | *pos++ = WLAN_EID_SSID; | |
727 | *pos++ = 0x0; | |
728 | ||
b8456a14 CYY |
729 | rcu_read_lock(); |
730 | csa = rcu_dereference(ifmsh->csa); | |
731 | if (csa) { | |
b8456a14 CYY |
732 | pos = skb_put(skb, 13); |
733 | memset(pos, 0, 13); | |
734 | *pos++ = WLAN_EID_CHANNEL_SWITCH; | |
735 | *pos++ = 3; | |
736 | *pos++ = 0x0; | |
737 | *pos++ = ieee80211_frequency_to_channel( | |
738 | csa->settings.chandef.chan->center_freq); | |
8df734e8 | 739 | bcn->csa_current_counter = csa->settings.count; |
af296bdb | 740 | bcn->csa_counter_offsets[0] = hdr_len + 6; |
b8456a14 CYY |
741 | *pos++ = csa->settings.count; |
742 | *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; | |
743 | *pos++ = 6; | |
0cb4d4dc | 744 | if (ifmsh->csa_role == IEEE80211_MESH_CSA_ROLE_INIT) { |
b8456a14 CYY |
745 | *pos++ = ifmsh->mshcfg.dot11MeshTTL; |
746 | *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR; | |
747 | } else { | |
748 | *pos++ = ifmsh->chsw_ttl; | |
749 | } | |
750 | *pos++ |= csa->settings.block_tx ? | |
751 | WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00; | |
752 | put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); | |
753 | pos += 2; | |
ca91dc97 | 754 | put_unaligned_le16(ifmsh->pre_value, pos); |
b8456a14 CYY |
755 | pos += 2; |
756 | } | |
757 | rcu_read_unlock(); | |
758 | ||
2b5e1967 | 759 | if (ieee80211_add_srates_ie(sdata, skb, true, band) || |
bf7cd94d | 760 | mesh_add_ds_params_ie(sdata, skb)) |
2b5e1967 TP |
761 | goto out_free; |
762 | ||
763 | bcn->head_len = skb->len; | |
764 | memcpy(bcn->head, skb->data, bcn->head_len); | |
765 | ||
766 | /* now the tail */ | |
767 | skb_trim(skb, 0); | |
768 | bcn->tail = bcn->head + bcn->head_len; | |
769 | ||
770 | if (ieee80211_add_ext_srates_ie(sdata, skb, true, band) || | |
bf7cd94d JB |
771 | mesh_add_rsn_ie(sdata, skb) || |
772 | mesh_add_ht_cap_ie(sdata, skb) || | |
773 | mesh_add_ht_oper_ie(sdata, skb) || | |
774 | mesh_add_meshid_ie(sdata, skb) || | |
775 | mesh_add_meshconf_ie(sdata, skb) || | |
776 | mesh_add_awake_window_ie(sdata, skb) || | |
c85fb53c BC |
777 | mesh_add_vht_cap_ie(sdata, skb) || |
778 | mesh_add_vht_oper_ie(sdata, skb) || | |
bf7cd94d | 779 | mesh_add_vendor_ies(sdata, skb)) |
2b5e1967 TP |
780 | goto out_free; |
781 | ||
782 | bcn->tail_len = skb->len; | |
783 | memcpy(bcn->tail, skb->data, bcn->tail_len); | |
43552be1 TP |
784 | bcn->meshconf = (struct ieee80211_meshconf_ie *) |
785 | (bcn->tail + ifmsh->meshconf_offset); | |
2b5e1967 TP |
786 | |
787 | dev_kfree_skb(skb); | |
788 | rcu_assign_pointer(ifmsh->beacon, bcn); | |
789 | return 0; | |
790 | out_free: | |
791 | kfree(bcn); | |
792 | dev_kfree_skb(skb); | |
793 | return -ENOMEM; | |
794 | } | |
795 | ||
796 | static int | |
8d61ffa5 | 797 | ieee80211_mesh_rebuild_beacon(struct ieee80211_sub_if_data *sdata) |
2b5e1967 | 798 | { |
2b5e1967 TP |
799 | struct beacon_data *old_bcn; |
800 | int ret; | |
2b5e1967 | 801 | |
8d61ffa5 JB |
802 | old_bcn = rcu_dereference_protected(sdata->u.mesh.beacon, |
803 | lockdep_is_held(&sdata->wdev.mtx)); | |
804 | ret = ieee80211_mesh_build_beacon(&sdata->u.mesh); | |
2b5e1967 TP |
805 | if (ret) |
806 | /* just reuse old beacon */ | |
8d61ffa5 | 807 | return ret; |
2b5e1967 TP |
808 | |
809 | if (old_bcn) | |
810 | kfree_rcu(old_bcn, rcu_head); | |
8d61ffa5 | 811 | return 0; |
2b5e1967 TP |
812 | } |
813 | ||
814 | void ieee80211_mbss_info_change_notify(struct ieee80211_sub_if_data *sdata, | |
815 | u32 changed) | |
816 | { | |
f81a9ded TP |
817 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
818 | unsigned long bits = changed; | |
819 | u32 bit; | |
820 | ||
821 | if (!bits) | |
822 | return; | |
823 | ||
824 | /* if we race with running work, worst case this work becomes a noop */ | |
825 | for_each_set_bit(bit, &bits, sizeof(changed) * BITS_PER_BYTE) | |
826 | set_bit(bit, &ifmsh->mbss_changed); | |
827 | set_bit(MESH_WORK_MBSS_CHANGED, &ifmsh->wrkq_flags); | |
828 | ieee80211_queue_work(&sdata->local->hw, &sdata->work); | |
2b5e1967 TP |
829 | } |
830 | ||
831 | int ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata) | |
472dbc45 JB |
832 | { |
833 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
834 | struct ieee80211_local *local = sdata->local; | |
f4eabc91 CYY |
835 | u32 changed = BSS_CHANGED_BEACON | |
836 | BSS_CHANGED_BEACON_ENABLED | | |
837 | BSS_CHANGED_HT | | |
838 | BSS_CHANGED_BASIC_RATES | | |
839 | BSS_CHANGED_BEACON_INT; | |
472dbc45 | 840 | |
09b17470 JB |
841 | local->fif_other_bss++; |
842 | /* mesh ifaces must set allmulti to forward mcast traffic */ | |
843 | atomic_inc(&local->iff_allmultis); | |
844 | ieee80211_configure_filter(local); | |
845 | ||
c7108a71 | 846 | ifmsh->mesh_cc_id = 0; /* Disabled */ |
dbf498fb JC |
847 | /* register sync ops from extensible synchronization framework */ |
848 | ifmsh->sync_ops = ieee80211_mesh_sync_ops_get(ifmsh->mesh_sp_id); | |
dbf498fb | 849 | ifmsh->sync_offset_clockdrift_max = 0; |
6b9ac442 | 850 | set_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags); |
63c5723b | 851 | ieee80211_mesh_root_setup(ifmsh); |
64592c8f | 852 | ieee80211_queue_work(&local->hw, &sdata->work); |
70c33eaa AN |
853 | sdata->vif.bss_conf.ht_operation_mode = |
854 | ifmsh->mshcfg.ht_opmode; | |
d6a83228 | 855 | sdata->vif.bss_conf.enable_beacon = true; |
f4eabc91 | 856 | |
39886b61 | 857 | changed |= ieee80211_mps_local_status_update(sdata); |
3f52b7e3 | 858 | |
2b5e1967 TP |
859 | if (ieee80211_mesh_build_beacon(ifmsh)) { |
860 | ieee80211_stop_mesh(sdata); | |
861 | return -ENOMEM; | |
862 | } | |
863 | ||
057d5f4b | 864 | ieee80211_recalc_dtim(local, sdata); |
f4eabc91 | 865 | ieee80211_bss_info_change_notify(sdata, changed); |
c405c629 JB |
866 | |
867 | netif_carrier_on(sdata->dev); | |
2b5e1967 | 868 | return 0; |
472dbc45 JB |
869 | } |
870 | ||
871 | void ieee80211_stop_mesh(struct ieee80211_sub_if_data *sdata) | |
872 | { | |
09b17470 | 873 | struct ieee80211_local *local = sdata->local; |
29cbe68c | 874 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
2b5e1967 | 875 | struct beacon_data *bcn; |
29cbe68c | 876 | |
c405c629 JB |
877 | netif_carrier_off(sdata->dev); |
878 | ||
c37a54ac MH |
879 | /* flush STAs and mpaths on this iface */ |
880 | sta_info_flush(sdata); | |
881 | mesh_path_flush_by_iface(sdata); | |
882 | ||
0d466b9c | 883 | /* stop the beacon */ |
29cbe68c | 884 | ifmsh->mesh_id_len = 0; |
d6a83228 JB |
885 | sdata->vif.bss_conf.enable_beacon = false; |
886 | clear_bit(SDATA_STATE_OFFCHANNEL_BEACON_STOPPED, &sdata->state); | |
29cbe68c | 887 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON_ENABLED); |
c37a54ac MH |
888 | |
889 | /* remove beacon */ | |
2b5e1967 | 890 | bcn = rcu_dereference_protected(ifmsh->beacon, |
8d61ffa5 | 891 | lockdep_is_held(&sdata->wdev.mtx)); |
0c2bef46 | 892 | RCU_INIT_POINTER(ifmsh->beacon, NULL); |
2b5e1967 | 893 | kfree_rcu(bcn, rcu_head); |
0d466b9c | 894 | |
3f52b7e3 MP |
895 | /* free all potentially still buffered group-addressed frames */ |
896 | local->total_ps_buffered -= skb_queue_len(&ifmsh->ps.bc_buf); | |
897 | skb_queue_purge(&ifmsh->ps.bc_buf); | |
898 | ||
472dbc45 | 899 | del_timer_sync(&sdata->u.mesh.housekeeping_timer); |
e304bfd3 | 900 | del_timer_sync(&sdata->u.mesh.mesh_path_root_timer); |
dd4c9260 | 901 | del_timer_sync(&sdata->u.mesh.mesh_path_timer); |
09b17470 | 902 | |
f81a9ded TP |
903 | /* clear any mesh work (for next join) we may have accrued */ |
904 | ifmsh->wrkq_flags = 0; | |
905 | ifmsh->mbss_changed = 0; | |
906 | ||
09b17470 JB |
907 | local->fif_other_bss--; |
908 | atomic_dec(&local->iff_allmultis); | |
909 | ieee80211_configure_filter(local); | |
472dbc45 JB |
910 | } |
911 | ||
33a45867 CYY |
912 | static bool |
913 | ieee80211_mesh_process_chnswitch(struct ieee80211_sub_if_data *sdata, | |
914 | struct ieee802_11_elems *elems, bool beacon) | |
915 | { | |
916 | struct cfg80211_csa_settings params; | |
917 | struct ieee80211_csa_ie csa_ie; | |
33a45867 | 918 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
57fbcce3 | 919 | enum nl80211_band band = ieee80211_get_sdata_band(sdata); |
0cb4d4dc | 920 | int err; |
33a45867 CYY |
921 | u32 sta_flags; |
922 | ||
dbd72850 MK |
923 | sdata_assert_lock(sdata); |
924 | ||
33a45867 CYY |
925 | sta_flags = IEEE80211_STA_DISABLE_VHT; |
926 | switch (sdata->vif.bss_conf.chandef.width) { | |
927 | case NL80211_CHAN_WIDTH_20_NOHT: | |
928 | sta_flags |= IEEE80211_STA_DISABLE_HT; | |
929 | case NL80211_CHAN_WIDTH_20: | |
930 | sta_flags |= IEEE80211_STA_DISABLE_40MHZ; | |
931 | break; | |
932 | default: | |
933 | break; | |
934 | } | |
935 | ||
936 | memset(¶ms, 0, sizeof(params)); | |
937 | memset(&csa_ie, 0, sizeof(csa_ie)); | |
84469a45 | 938 | err = ieee80211_parse_ch_switch_ie(sdata, elems, band, |
33a45867 CYY |
939 | sta_flags, sdata->vif.addr, |
940 | &csa_ie); | |
941 | if (err < 0) | |
942 | return false; | |
943 | if (err) | |
944 | return false; | |
945 | ||
946 | params.chandef = csa_ie.chandef; | |
947 | params.count = csa_ie.count; | |
948 | ||
33a45867 CYY |
949 | if (!cfg80211_chandef_usable(sdata->local->hw.wiphy, ¶ms.chandef, |
950 | IEEE80211_CHAN_DISABLED)) { | |
951 | sdata_info(sdata, | |
952 | "mesh STA %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), aborting\n", | |
953 | sdata->vif.addr, | |
954 | params.chandef.chan->center_freq, | |
955 | params.chandef.width, | |
956 | params.chandef.center_freq1, | |
957 | params.chandef.center_freq2); | |
958 | return false; | |
959 | } | |
960 | ||
961 | err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy, | |
2beb6dab LC |
962 | ¶ms.chandef, |
963 | NL80211_IFTYPE_MESH_POINT); | |
33a45867 CYY |
964 | if (err < 0) |
965 | return false; | |
2beb6dab | 966 | if (err > 0) |
33a45867 CYY |
967 | /* TODO: DFS not (yet) supported */ |
968 | return false; | |
2beb6dab LC |
969 | |
970 | params.radar_required = err; | |
33a45867 | 971 | |
0cb4d4dc LC |
972 | if (cfg80211_chandef_identical(¶ms.chandef, |
973 | &sdata->vif.bss_conf.chandef)) { | |
974 | mcsa_dbg(sdata, | |
975 | "received csa with an identical chandef, ignoring\n"); | |
976 | return true; | |
977 | } | |
33a45867 CYY |
978 | |
979 | mcsa_dbg(sdata, | |
980 | "received channel switch announcement to go to channel %d MHz\n", | |
981 | params.chandef.chan->center_freq); | |
982 | ||
983 | params.block_tx = csa_ie.mode & WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT; | |
3f718fd8 | 984 | if (beacon) { |
33a45867 | 985 | ifmsh->chsw_ttl = csa_ie.ttl - 1; |
3f718fd8 CYY |
986 | if (ifmsh->pre_value >= csa_ie.pre_value) |
987 | return false; | |
988 | ifmsh->pre_value = csa_ie.pre_value; | |
989 | } | |
33a45867 | 990 | |
0cb4d4dc | 991 | if (ifmsh->chsw_ttl >= ifmsh->mshcfg.dot11MeshTTL) |
3f718fd8 | 992 | return false; |
33a45867 | 993 | |
0cb4d4dc | 994 | ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_REPEATER; |
33a45867 | 995 | |
0cb4d4dc LC |
996 | if (ieee80211_channel_switch(sdata->local->hw.wiphy, sdata->dev, |
997 | ¶ms) < 0) | |
998 | return false; | |
33a45867 CYY |
999 | |
1000 | return true; | |
33a45867 CYY |
1001 | } |
1002 | ||
9fb04b50 TP |
1003 | static void |
1004 | ieee80211_mesh_rx_probe_req(struct ieee80211_sub_if_data *sdata, | |
1005 | struct ieee80211_mgmt *mgmt, size_t len) | |
1006 | { | |
1007 | struct ieee80211_local *local = sdata->local; | |
1008 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
1009 | struct sk_buff *presp; | |
1010 | struct beacon_data *bcn; | |
1011 | struct ieee80211_mgmt *hdr; | |
1012 | struct ieee802_11_elems elems; | |
1013 | size_t baselen; | |
511044ea | 1014 | u8 *pos; |
9fb04b50 | 1015 | |
9fb04b50 TP |
1016 | pos = mgmt->u.probe_req.variable; |
1017 | baselen = (u8 *) pos - (u8 *) mgmt; | |
1018 | if (baselen > len) | |
1019 | return; | |
1020 | ||
b2e506bf | 1021 | ieee802_11_parse_elems(pos, len - baselen, false, &elems); |
9fb04b50 | 1022 | |
a4ef66a9 CYY |
1023 | if (!elems.mesh_id) |
1024 | return; | |
1025 | ||
9fb04b50 TP |
1026 | /* 802.11-2012 10.1.4.3.2 */ |
1027 | if ((!ether_addr_equal(mgmt->da, sdata->vif.addr) && | |
1028 | !is_broadcast_ether_addr(mgmt->da)) || | |
1029 | elems.ssid_len != 0) | |
1030 | return; | |
1031 | ||
1032 | if (elems.mesh_id_len != 0 && | |
1033 | (elems.mesh_id_len != ifmsh->mesh_id_len || | |
1034 | memcmp(elems.mesh_id, ifmsh->mesh_id, ifmsh->mesh_id_len))) | |
1035 | return; | |
1036 | ||
1037 | rcu_read_lock(); | |
1038 | bcn = rcu_dereference(ifmsh->beacon); | |
1039 | ||
1040 | if (!bcn) | |
1041 | goto out; | |
1042 | ||
1043 | presp = dev_alloc_skb(local->tx_headroom + | |
1044 | bcn->head_len + bcn->tail_len); | |
1045 | if (!presp) | |
1046 | goto out; | |
1047 | ||
1048 | skb_reserve(presp, local->tx_headroom); | |
1049 | memcpy(skb_put(presp, bcn->head_len), bcn->head, bcn->head_len); | |
1050 | memcpy(skb_put(presp, bcn->tail_len), bcn->tail, bcn->tail_len); | |
1051 | hdr = (struct ieee80211_mgmt *) presp->data; | |
1052 | hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
1053 | IEEE80211_STYPE_PROBE_RESP); | |
1054 | memcpy(hdr->da, mgmt->sa, ETH_ALEN); | |
9fb04b50 TP |
1055 | IEEE80211_SKB_CB(presp)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
1056 | ieee80211_tx_skb(sdata, presp); | |
1057 | out: | |
1058 | rcu_read_unlock(); | |
1059 | } | |
1060 | ||
472dbc45 JB |
1061 | static void ieee80211_mesh_rx_bcn_presp(struct ieee80211_sub_if_data *sdata, |
1062 | u16 stype, | |
1063 | struct ieee80211_mgmt *mgmt, | |
1064 | size_t len, | |
1065 | struct ieee80211_rx_status *rx_status) | |
1066 | { | |
c6a1fa12 | 1067 | struct ieee80211_local *local = sdata->local; |
dbf498fb | 1068 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
472dbc45 JB |
1069 | struct ieee802_11_elems elems; |
1070 | struct ieee80211_channel *channel; | |
472dbc45 JB |
1071 | size_t baselen; |
1072 | int freq; | |
57fbcce3 | 1073 | enum nl80211_band band = rx_status->band; |
472dbc45 JB |
1074 | |
1075 | /* ignore ProbeResp to foreign address */ | |
1076 | if (stype == IEEE80211_STYPE_PROBE_RESP && | |
b203ca39 | 1077 | !ether_addr_equal(mgmt->da, sdata->vif.addr)) |
472dbc45 JB |
1078 | return; |
1079 | ||
1080 | baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; | |
1081 | if (baselen > len) | |
1082 | return; | |
1083 | ||
1084 | ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, | |
b2e506bf | 1085 | false, &elems); |
472dbc45 | 1086 | |
9a90bc81 TP |
1087 | /* ignore non-mesh or secure / unsecure mismatch */ |
1088 | if ((!elems.mesh_id || !elems.mesh_config) || | |
1089 | (elems.rsn && sdata->u.mesh.security == IEEE80211_MESH_SEC_NONE) || | |
1090 | (!elems.rsn && sdata->u.mesh.security != IEEE80211_MESH_SEC_NONE)) | |
5cff5e01 JC |
1091 | return; |
1092 | ||
1cd8e88e | 1093 | if (elems.ds_params) |
59eb21a6 | 1094 | freq = ieee80211_channel_to_frequency(elems.ds_params[0], band); |
472dbc45 JB |
1095 | else |
1096 | freq = rx_status->freq; | |
1097 | ||
1098 | channel = ieee80211_get_channel(local->hw.wiphy, freq); | |
1099 | ||
1100 | if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) | |
1101 | return; | |
1102 | ||
9a90bc81 | 1103 | if (mesh_matches_local(sdata, &elems)) |
f743ff49 | 1104 | mesh_neighbour_update(sdata, mgmt->sa, &elems); |
dbf498fb JC |
1105 | |
1106 | if (ifmsh->sync_ops) | |
1107 | ifmsh->sync_ops->rx_bcn_presp(sdata, | |
1108 | stype, mgmt, &elems, rx_status); | |
33a45867 | 1109 | |
0cb4d4dc LC |
1110 | if (ifmsh->csa_role != IEEE80211_MESH_CSA_ROLE_INIT && |
1111 | !sdata->vif.csa_active) | |
33a45867 | 1112 | ieee80211_mesh_process_chnswitch(sdata, &elems, true); |
472dbc45 JB |
1113 | } |
1114 | ||
b8456a14 CYY |
1115 | int ieee80211_mesh_finish_csa(struct ieee80211_sub_if_data *sdata) |
1116 | { | |
1117 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
1118 | struct mesh_csa_settings *tmp_csa_settings; | |
1119 | int ret = 0; | |
faf046e7 | 1120 | int changed = 0; |
b8456a14 CYY |
1121 | |
1122 | /* Reset the TTL value and Initiator flag */ | |
0cb4d4dc | 1123 | ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_NONE; |
b8456a14 CYY |
1124 | ifmsh->chsw_ttl = 0; |
1125 | ||
1126 | /* Remove the CSA and MCSP elements from the beacon */ | |
1127 | tmp_csa_settings = rcu_dereference(ifmsh->csa); | |
0c2bef46 | 1128 | RCU_INIT_POINTER(ifmsh->csa, NULL); |
66e01cf9 LC |
1129 | if (tmp_csa_settings) |
1130 | kfree_rcu(tmp_csa_settings, rcu_head); | |
b8456a14 CYY |
1131 | ret = ieee80211_mesh_rebuild_beacon(sdata); |
1132 | if (ret) | |
1133 | return -EINVAL; | |
1134 | ||
faf046e7 | 1135 | changed |= BSS_CHANGED_BEACON; |
b8456a14 CYY |
1136 | |
1137 | mcsa_dbg(sdata, "complete switching to center freq %d MHz", | |
1138 | sdata->vif.bss_conf.chandef.chan->center_freq); | |
faf046e7 | 1139 | return changed; |
b8456a14 CYY |
1140 | } |
1141 | ||
1142 | int ieee80211_mesh_csa_beacon(struct ieee80211_sub_if_data *sdata, | |
66e01cf9 | 1143 | struct cfg80211_csa_settings *csa_settings) |
b8456a14 CYY |
1144 | { |
1145 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
1146 | struct mesh_csa_settings *tmp_csa_settings; | |
1147 | int ret = 0; | |
1148 | ||
1149 | tmp_csa_settings = kmalloc(sizeof(*tmp_csa_settings), | |
1150 | GFP_ATOMIC); | |
1151 | if (!tmp_csa_settings) | |
1152 | return -ENOMEM; | |
1153 | ||
1154 | memcpy(&tmp_csa_settings->settings, csa_settings, | |
1155 | sizeof(struct cfg80211_csa_settings)); | |
1156 | ||
1157 | rcu_assign_pointer(ifmsh->csa, tmp_csa_settings); | |
1158 | ||
1159 | ret = ieee80211_mesh_rebuild_beacon(sdata); | |
1160 | if (ret) { | |
1161 | tmp_csa_settings = rcu_dereference(ifmsh->csa); | |
0c2bef46 | 1162 | RCU_INIT_POINTER(ifmsh->csa, NULL); |
b8456a14 CYY |
1163 | kfree_rcu(tmp_csa_settings, rcu_head); |
1164 | return ret; | |
1165 | } | |
1166 | ||
b58e81e9 | 1167 | return BSS_CHANGED_BEACON; |
b8456a14 CYY |
1168 | } |
1169 | ||
8f2535b9 CYY |
1170 | static int mesh_fwd_csa_frame(struct ieee80211_sub_if_data *sdata, |
1171 | struct ieee80211_mgmt *mgmt, size_t len) | |
1172 | { | |
1173 | struct ieee80211_mgmt *mgmt_fwd; | |
1174 | struct sk_buff *skb; | |
1175 | struct ieee80211_local *local = sdata->local; | |
1176 | u8 *pos = mgmt->u.action.u.chan_switch.variable; | |
1177 | size_t offset_ttl; | |
1178 | ||
1179 | skb = dev_alloc_skb(local->tx_headroom + len); | |
1180 | if (!skb) | |
1181 | return -ENOMEM; | |
1182 | skb_reserve(skb, local->tx_headroom); | |
1183 | mgmt_fwd = (struct ieee80211_mgmt *) skb_put(skb, len); | |
1184 | ||
1185 | /* offset_ttl is based on whether the secondary channel | |
b314c669 | 1186 | * offset is available or not. Subtract 1 from the mesh TTL |
8f2535b9 CYY |
1187 | * and disable the initiator flag before forwarding. |
1188 | */ | |
1189 | offset_ttl = (len < 42) ? 7 : 10; | |
1190 | *(pos + offset_ttl) -= 1; | |
1191 | *(pos + offset_ttl + 1) &= ~WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR; | |
1192 | ||
1193 | memcpy(mgmt_fwd, mgmt, len); | |
1194 | eth_broadcast_addr(mgmt_fwd->da); | |
1195 | memcpy(mgmt_fwd->sa, sdata->vif.addr, ETH_ALEN); | |
1196 | memcpy(mgmt_fwd->bssid, sdata->vif.addr, ETH_ALEN); | |
1197 | ||
1198 | ieee80211_tx_skb(sdata, skb); | |
1199 | return 0; | |
1200 | } | |
1201 | ||
1202 | static void mesh_rx_csa_frame(struct ieee80211_sub_if_data *sdata, | |
1203 | struct ieee80211_mgmt *mgmt, size_t len) | |
1204 | { | |
1205 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
1206 | struct ieee802_11_elems elems; | |
1207 | u16 pre_value; | |
33a45867 | 1208 | bool fwd_csa = true; |
8f2535b9 | 1209 | size_t baselen; |
3f718fd8 | 1210 | u8 *pos; |
8f2535b9 CYY |
1211 | |
1212 | if (mgmt->u.action.u.measurement.action_code != | |
1213 | WLAN_ACTION_SPCT_CHL_SWITCH) | |
1214 | return; | |
1215 | ||
1216 | pos = mgmt->u.action.u.chan_switch.variable; | |
1217 | baselen = offsetof(struct ieee80211_mgmt, | |
1218 | u.action.u.chan_switch.variable); | |
1219 | ieee802_11_parse_elems(pos, len - baselen, false, &elems); | |
1220 | ||
3f718fd8 CYY |
1221 | ifmsh->chsw_ttl = elems.mesh_chansw_params_ie->mesh_ttl; |
1222 | if (!--ifmsh->chsw_ttl) | |
8f2535b9 CYY |
1223 | fwd_csa = false; |
1224 | ||
1225 | pre_value = le16_to_cpu(elems.mesh_chansw_params_ie->mesh_pre_value); | |
1226 | if (ifmsh->pre_value >= pre_value) | |
1227 | return; | |
1228 | ||
1229 | ifmsh->pre_value = pre_value; | |
1230 | ||
0cb4d4dc LC |
1231 | if (!sdata->vif.csa_active && |
1232 | !ieee80211_mesh_process_chnswitch(sdata, &elems, false)) { | |
33a45867 CYY |
1233 | mcsa_dbg(sdata, "Failed to process CSA action frame"); |
1234 | return; | |
1235 | } | |
1236 | ||
8f2535b9 CYY |
1237 | /* forward or re-broadcast the CSA frame */ |
1238 | if (fwd_csa) { | |
1239 | if (mesh_fwd_csa_frame(sdata, mgmt, len) < 0) | |
1240 | mcsa_dbg(sdata, "Failed to forward the CSA frame"); | |
1241 | } | |
8f2535b9 CYY |
1242 | } |
1243 | ||
472dbc45 JB |
1244 | static void ieee80211_mesh_rx_mgmt_action(struct ieee80211_sub_if_data *sdata, |
1245 | struct ieee80211_mgmt *mgmt, | |
1246 | size_t len, | |
1247 | struct ieee80211_rx_status *rx_status) | |
1248 | { | |
1249 | switch (mgmt->u.action.category) { | |
8db09850 TP |
1250 | case WLAN_CATEGORY_SELF_PROTECTED: |
1251 | switch (mgmt->u.action.u.self_prot.action_code) { | |
1252 | case WLAN_SP_MESH_PEERING_OPEN: | |
1253 | case WLAN_SP_MESH_PEERING_CLOSE: | |
1254 | case WLAN_SP_MESH_PEERING_CONFIRM: | |
1255 | mesh_rx_plink_frame(sdata, mgmt, len, rx_status); | |
1256 | break; | |
1257 | } | |
472dbc45 | 1258 | break; |
25d49e4d TP |
1259 | case WLAN_CATEGORY_MESH_ACTION: |
1260 | if (mesh_action_is_path_sel(mgmt)) | |
1261 | mesh_rx_path_sel_frame(sdata, mgmt, len); | |
472dbc45 | 1262 | break; |
8f2535b9 CYY |
1263 | case WLAN_CATEGORY_SPECTRUM_MGMT: |
1264 | mesh_rx_csa_frame(sdata, mgmt, len); | |
1265 | break; | |
472dbc45 JB |
1266 | } |
1267 | } | |
1268 | ||
1fa57d01 JB |
1269 | void ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, |
1270 | struct sk_buff *skb) | |
472dbc45 JB |
1271 | { |
1272 | struct ieee80211_rx_status *rx_status; | |
472dbc45 JB |
1273 | struct ieee80211_mgmt *mgmt; |
1274 | u16 stype; | |
1275 | ||
ecccd072 TP |
1276 | sdata_lock(sdata); |
1277 | ||
1278 | /* mesh already went down */ | |
1693d344 | 1279 | if (!sdata->u.mesh.mesh_id_len) |
ecccd072 TP |
1280 | goto out; |
1281 | ||
f1d58c25 | 1282 | rx_status = IEEE80211_SKB_RXCB(skb); |
472dbc45 JB |
1283 | mgmt = (struct ieee80211_mgmt *) skb->data; |
1284 | stype = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE; | |
1285 | ||
1286 | switch (stype) { | |
1287 | case IEEE80211_STYPE_PROBE_RESP: | |
1288 | case IEEE80211_STYPE_BEACON: | |
1289 | ieee80211_mesh_rx_bcn_presp(sdata, stype, mgmt, skb->len, | |
1290 | rx_status); | |
1291 | break; | |
9fb04b50 TP |
1292 | case IEEE80211_STYPE_PROBE_REQ: |
1293 | ieee80211_mesh_rx_probe_req(sdata, mgmt, skb->len); | |
1294 | break; | |
472dbc45 JB |
1295 | case IEEE80211_STYPE_ACTION: |
1296 | ieee80211_mesh_rx_mgmt_action(sdata, mgmt, skb->len, rx_status); | |
1297 | break; | |
1298 | } | |
ecccd072 TP |
1299 | out: |
1300 | sdata_unlock(sdata); | |
472dbc45 JB |
1301 | } |
1302 | ||
f81a9ded TP |
1303 | static void mesh_bss_info_changed(struct ieee80211_sub_if_data *sdata) |
1304 | { | |
1305 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
1306 | u32 bit, changed = 0; | |
1307 | ||
1308 | for_each_set_bit(bit, &ifmsh->mbss_changed, | |
1309 | sizeof(changed) * BITS_PER_BYTE) { | |
1310 | clear_bit(bit, &ifmsh->mbss_changed); | |
1311 | changed |= BIT(bit); | |
1312 | } | |
1313 | ||
1314 | if (sdata->vif.bss_conf.enable_beacon && | |
1315 | (changed & (BSS_CHANGED_BEACON | | |
1316 | BSS_CHANGED_HT | | |
1317 | BSS_CHANGED_BASIC_RATES | | |
1318 | BSS_CHANGED_BEACON_INT))) | |
1319 | if (ieee80211_mesh_rebuild_beacon(sdata)) | |
1320 | return; | |
1321 | ||
1322 | ieee80211_bss_info_change_notify(sdata, changed); | |
1323 | } | |
1324 | ||
1fa57d01 | 1325 | void ieee80211_mesh_work(struct ieee80211_sub_if_data *sdata) |
472dbc45 | 1326 | { |
472dbc45 | 1327 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
472dbc45 | 1328 | |
ecccd072 TP |
1329 | sdata_lock(sdata); |
1330 | ||
1331 | /* mesh already went down */ | |
1693d344 | 1332 | if (!sdata->u.mesh.mesh_id_len) |
ecccd072 TP |
1333 | goto out; |
1334 | ||
472dbc45 JB |
1335 | if (ifmsh->preq_queue_len && |
1336 | time_after(jiffies, | |
1337 | ifmsh->last_preq + msecs_to_jiffies(ifmsh->mshcfg.dot11MeshHWMPpreqMinInterval))) | |
1338 | mesh_path_start_discovery(sdata); | |
1339 | ||
18889231 | 1340 | if (test_and_clear_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags)) |
bf7cd94d | 1341 | ieee80211_mesh_housekeeping(sdata); |
e304bfd3 RP |
1342 | |
1343 | if (test_and_clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags)) | |
1344 | ieee80211_mesh_rootpath(sdata); | |
dbf498fb JC |
1345 | |
1346 | if (test_and_clear_bit(MESH_WORK_DRIFT_ADJUST, &ifmsh->wrkq_flags)) | |
445cd452 | 1347 | mesh_sync_adjust_tsf(sdata); |
ecccd072 | 1348 | |
f81a9ded TP |
1349 | if (test_and_clear_bit(MESH_WORK_MBSS_CHANGED, &ifmsh->wrkq_flags)) |
1350 | mesh_bss_info_changed(sdata); | |
ecccd072 TP |
1351 | out: |
1352 | sdata_unlock(sdata); | |
472dbc45 JB |
1353 | } |
1354 | ||
472dbc45 | 1355 | |
902acc78 JB |
1356 | void ieee80211_mesh_init_sdata(struct ieee80211_sub_if_data *sdata) |
1357 | { | |
472dbc45 | 1358 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
ad2d223a | 1359 | static u8 zero_addr[ETH_ALEN] = {}; |
472dbc45 | 1360 | |
472dbc45 JB |
1361 | setup_timer(&ifmsh->housekeeping_timer, |
1362 | ieee80211_mesh_housekeeping_timer, | |
1363 | (unsigned long) sdata); | |
472dbc45 | 1364 | |
472dbc45 | 1365 | ifmsh->accepting_plinks = true; |
472dbc45 | 1366 | atomic_set(&ifmsh->mpaths, 0); |
f698d856 | 1367 | mesh_rmc_init(sdata); |
472dbc45 | 1368 | ifmsh->last_preq = jiffies; |
dca7e943 | 1369 | ifmsh->next_perr = jiffies; |
0cb4d4dc | 1370 | ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_NONE; |
902acc78 JB |
1371 | /* Allocate all mesh structures when creating the first mesh interface. */ |
1372 | if (!mesh_allocated) | |
1373 | ieee80211s_init(); | |
2bdaf386 BC |
1374 | |
1375 | mesh_pathtbl_init(sdata); | |
1376 | ||
472dbc45 | 1377 | setup_timer(&ifmsh->mesh_path_timer, |
902acc78 JB |
1378 | ieee80211_mesh_path_timer, |
1379 | (unsigned long) sdata); | |
e304bfd3 RP |
1380 | setup_timer(&ifmsh->mesh_path_root_timer, |
1381 | ieee80211_mesh_path_root_timer, | |
1382 | (unsigned long) sdata); | |
472dbc45 | 1383 | INIT_LIST_HEAD(&ifmsh->preq_queue.list); |
3f52b7e3 | 1384 | skb_queue_head_init(&ifmsh->ps.bc_buf); |
472dbc45 | 1385 | spin_lock_init(&ifmsh->mesh_preq_queue_lock); |
dbf498fb | 1386 | spin_lock_init(&ifmsh->sync_offset_lock); |
2b5e1967 | 1387 | RCU_INIT_POINTER(ifmsh->beacon, NULL); |
ad2d223a JB |
1388 | |
1389 | sdata->vif.bss_conf.bssid = zero_addr; | |
472dbc45 | 1390 | } |
0371a08f BC |
1391 | |
1392 | void ieee80211_mesh_teardown_sdata(struct ieee80211_sub_if_data *sdata) | |
1393 | { | |
1394 | mesh_rmc_free(sdata); | |
1395 | mesh_pathtbl_unregister(sdata); | |
1396 | } |