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 | { | |
28 | mesh_pathtbl_init(); | |
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 | mesh_pathtbl_unregister(); |
39 | kmem_cache_destroy(rm_cache); | |
40 | } | |
41 | ||
472dbc45 JB |
42 | static void ieee80211_mesh_housekeeping_timer(unsigned long data) |
43 | { | |
44 | struct ieee80211_sub_if_data *sdata = (void *) data; | |
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; |
2e3c8736 | 68 | |
2e3c8736 LCC |
69 | /* |
70 | * As support for each feature is added, check for matching | |
71 | * - On mesh config capabilities | |
72 | * - Power Save Support En | |
73 | * - Sync support enabled | |
74 | * - Sync support active | |
75 | * - Sync support required from peer | |
76 | * - MDA enabled | |
77 | * - Power management control on fc | |
78 | */ | |
739522ba TP |
79 | if (!(ifmsh->mesh_id_len == ie->mesh_id_len && |
80 | memcmp(ifmsh->mesh_id, ie->mesh_id, ie->mesh_id_len) == 0 && | |
81 | (ifmsh->mesh_pp_id == ie->mesh_config->meshconf_psel) && | |
82 | (ifmsh->mesh_pm_id == ie->mesh_config->meshconf_pmetric) && | |
83 | (ifmsh->mesh_cc_id == ie->mesh_config->meshconf_congest) && | |
84 | (ifmsh->mesh_sp_id == ie->mesh_config->meshconf_synch) && | |
85 | (ifmsh->mesh_auth_id == ie->mesh_config->meshconf_auth))) | |
bf7cd94d | 86 | return false; |
739522ba | 87 | |
2103dec1 | 88 | ieee80211_sta_get_rates(sdata, ie, ieee80211_get_sdata_band(sdata), |
f743ff49 TP |
89 | &basic_rates); |
90 | ||
fe40cb62 | 91 | if (sdata->vif.bss_conf.basic_rates != basic_rates) |
bf7cd94d | 92 | return false; |
fe40cb62 | 93 | |
4bf88530 JB |
94 | ieee80211_ht_oper_to_chandef(sdata->vif.bss_conf.chandef.chan, |
95 | ie->ht_operation, &sta_chan_def); | |
96 | ||
c85fb53c BC |
97 | ieee80211_vht_oper_to_chandef(sdata->vif.bss_conf.chandef.chan, |
98 | ie->vht_operation, &sta_chan_def); | |
99 | ||
4bf88530 JB |
100 | if (!cfg80211_chandef_compatible(&sdata->vif.bss_conf.chandef, |
101 | &sta_chan_def)) | |
bf7cd94d | 102 | return false; |
2e3c8736 | 103 | |
739522ba | 104 | return true; |
2e3c8736 LCC |
105 | } |
106 | ||
107 | /** | |
108 | * mesh_peer_accepts_plinks - check if an mp is willing to establish peer links | |
109 | * | |
110 | * @ie: information elements of a management frame from the mesh peer | |
2e3c8736 | 111 | */ |
f698d856 | 112 | bool mesh_peer_accepts_plinks(struct ieee802_11_elems *ie) |
2e3c8736 | 113 | { |
136cfa28 | 114 | return (ie->mesh_config->meshconf_cap & |
bf7cd94d | 115 | IEEE80211_MESHCONF_CAPAB_ACCEPT_PLINKS) != 0; |
2e3c8736 LCC |
116 | } |
117 | ||
118 | /** | |
2c53040f | 119 | * mesh_accept_plinks_update - update accepting_plink in local mesh beacons |
2e3c8736 | 120 | * |
d0709a65 | 121 | * @sdata: mesh interface in which mesh beacons are going to be updated |
df323818 MP |
122 | * |
123 | * Returns: beacon changed flag if the beacon content changed. | |
2e3c8736 | 124 | */ |
df323818 | 125 | u32 mesh_accept_plinks_update(struct ieee80211_sub_if_data *sdata) |
2e3c8736 | 126 | { |
2e3c8736 | 127 | bool free_plinks; |
df323818 | 128 | u32 changed = 0; |
2e3c8736 LCC |
129 | |
130 | /* In case mesh_plink_free_count > 0 and mesh_plinktbl_capacity == 0, | |
131 | * the mesh interface might be able to establish plinks with peers that | |
b4e08ea1 LCC |
132 | * are already on the table but are not on PLINK_ESTAB state. However, |
133 | * in general the mesh interface is not accepting peer link requests | |
134 | * from new peers, and that must be reflected in the beacon | |
2e3c8736 LCC |
135 | */ |
136 | free_plinks = mesh_plink_availables(sdata); | |
137 | ||
df323818 MP |
138 | if (free_plinks != sdata->u.mesh.accepting_plinks) { |
139 | sdata->u.mesh.accepting_plinks = free_plinks; | |
140 | changed = BSS_CHANGED_BEACON; | |
141 | } | |
142 | ||
143 | return changed; | |
2e3c8736 LCC |
144 | } |
145 | ||
45b5028e TP |
146 | /* |
147 | * mesh_sta_cleanup - clean up any mesh sta state | |
148 | * | |
149 | * @sta: mesh sta to clean up. | |
150 | */ | |
151 | void mesh_sta_cleanup(struct sta_info *sta) | |
152 | { | |
153 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
154 | u32 changed; | |
155 | ||
156 | /* | |
157 | * maybe userspace handles peer allocation and peering, but in either | |
158 | * case the beacon is still generated by the kernel and we might need | |
159 | * an update. | |
160 | */ | |
161 | changed = mesh_accept_plinks_update(sdata); | |
a6dad6a2 | 162 | if (!sdata->u.mesh.user_mpm) { |
45b5028e | 163 | changed |= mesh_plink_deactivate(sta); |
433f5bc1 | 164 | del_timer_sync(&sta->mesh->plink_timer); |
45b5028e TP |
165 | } |
166 | ||
f81a9ded | 167 | if (changed) |
2b5e1967 | 168 | ieee80211_mbss_info_change_notify(sdata, changed); |
45b5028e TP |
169 | } |
170 | ||
f698d856 | 171 | int mesh_rmc_init(struct ieee80211_sub_if_data *sdata) |
2e3c8736 | 172 | { |
2e3c8736 LCC |
173 | int i; |
174 | ||
472dbc45 JB |
175 | sdata->u.mesh.rmc = kmalloc(sizeof(struct mesh_rmc), GFP_KERNEL); |
176 | if (!sdata->u.mesh.rmc) | |
2e3c8736 | 177 | return -ENOMEM; |
472dbc45 | 178 | sdata->u.mesh.rmc->idx_mask = RMC_BUCKETS - 1; |
2e3c8736 | 179 | for (i = 0; i < RMC_BUCKETS; i++) |
b7cfcd11 | 180 | INIT_LIST_HEAD(&sdata->u.mesh.rmc->bucket[i]); |
2e3c8736 LCC |
181 | return 0; |
182 | } | |
183 | ||
f698d856 | 184 | void mesh_rmc_free(struct ieee80211_sub_if_data *sdata) |
2e3c8736 | 185 | { |
472dbc45 | 186 | struct mesh_rmc *rmc = sdata->u.mesh.rmc; |
2e3c8736 LCC |
187 | struct rmc_entry *p, *n; |
188 | int i; | |
189 | ||
472dbc45 | 190 | if (!sdata->u.mesh.rmc) |
2e3c8736 LCC |
191 | return; |
192 | ||
bf7cd94d | 193 | for (i = 0; i < RMC_BUCKETS; i++) { |
b7cfcd11 | 194 | list_for_each_entry_safe(p, n, &rmc->bucket[i], list) { |
2e3c8736 LCC |
195 | list_del(&p->list); |
196 | kmem_cache_free(rm_cache, p); | |
197 | } | |
bf7cd94d | 198 | } |
2e3c8736 LCC |
199 | |
200 | kfree(rmc); | |
472dbc45 | 201 | sdata->u.mesh.rmc = NULL; |
2e3c8736 LCC |
202 | } |
203 | ||
204 | /** | |
205 | * mesh_rmc_check - Check frame in recent multicast cache and add if absent. | |
206 | * | |
bf7cd94d | 207 | * @sdata: interface |
2e3c8736 LCC |
208 | * @sa: source address |
209 | * @mesh_hdr: mesh_header | |
210 | * | |
211 | * Returns: 0 if the frame is not in the cache, nonzero otherwise. | |
212 | * | |
213 | * Checks using the source address and the mesh sequence number if we have | |
214 | * received this frame lately. If the frame is not in the cache, it is added to | |
215 | * it. | |
216 | */ | |
bf7cd94d JB |
217 | int mesh_rmc_check(struct ieee80211_sub_if_data *sdata, |
218 | const u8 *sa, struct ieee80211s_hdr *mesh_hdr) | |
2e3c8736 | 219 | { |
472dbc45 | 220 | struct mesh_rmc *rmc = sdata->u.mesh.rmc; |
2e3c8736 LCC |
221 | u32 seqnum = 0; |
222 | int entries = 0; | |
223 | u8 idx; | |
224 | struct rmc_entry *p, *n; | |
225 | ||
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; | |
b7cfcd11 | 229 | list_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) { |
2e3c8736 LCC |
233 | list_del(&p->list); |
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); | |
b7cfcd11 | 247 | list_add(&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; |
dbf498fb | 291 | *pos++ |= ifmsh->adjusting_tbtt ? |
bf7cd94d | 292 | IEEE80211_MESHCONF_CAPAB_TBTT_ADJUSTING : 0x00; |
082ebb0c TP |
293 | *pos++ = 0x00; |
294 | ||
295 | return 0; | |
296 | } | |
297 | ||
bf7cd94d | 298 | int mesh_add_meshid_ie(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb) |
082ebb0c TP |
299 | { |
300 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
301 | u8 *pos; | |
302 | ||
303 | if (skb_tailroom(skb) < 2 + ifmsh->mesh_id_len) | |
304 | return -ENOMEM; | |
305 | ||
306 | pos = skb_put(skb, 2 + ifmsh->mesh_id_len); | |
307 | *pos++ = WLAN_EID_MESH_ID; | |
308 | *pos++ = ifmsh->mesh_id_len; | |
309 | if (ifmsh->mesh_id_len) | |
310 | memcpy(pos, ifmsh->mesh_id, ifmsh->mesh_id_len); | |
311 | ||
312 | return 0; | |
313 | } | |
314 | ||
bf7cd94d JB |
315 | static int mesh_add_awake_window_ie(struct ieee80211_sub_if_data *sdata, |
316 | struct sk_buff *skb) | |
3f52b7e3 MP |
317 | { |
318 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
319 | u8 *pos; | |
320 | ||
321 | /* see IEEE802.11-2012 13.14.6 */ | |
322 | if (ifmsh->ps_peers_light_sleep == 0 && | |
323 | ifmsh->ps_peers_deep_sleep == 0 && | |
324 | ifmsh->nonpeer_pm == NL80211_MESH_POWER_ACTIVE) | |
325 | return 0; | |
326 | ||
327 | if (skb_tailroom(skb) < 4) | |
328 | return -ENOMEM; | |
329 | ||
330 | pos = skb_put(skb, 2 + 2); | |
331 | *pos++ = WLAN_EID_MESH_AWAKE_WINDOW; | |
332 | *pos++ = 2; | |
333 | put_unaligned_le16(ifmsh->mshcfg.dot11MeshAwakeWindowDuration, pos); | |
334 | ||
335 | return 0; | |
336 | } | |
337 | ||
bf7cd94d JB |
338 | int mesh_add_vendor_ies(struct ieee80211_sub_if_data *sdata, |
339 | struct sk_buff *skb) | |
082ebb0c TP |
340 | { |
341 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
342 | u8 offset, len; | |
343 | const u8 *data; | |
344 | ||
345 | if (!ifmsh->ie || !ifmsh->ie_len) | |
346 | return 0; | |
347 | ||
348 | /* fast-forward to vendor IEs */ | |
349 | offset = ieee80211_ie_split_vendor(ifmsh->ie, ifmsh->ie_len, 0); | |
350 | ||
351 | if (offset) { | |
352 | len = ifmsh->ie_len - offset; | |
353 | data = ifmsh->ie + offset; | |
354 | if (skb_tailroom(skb) < len) | |
355 | return -ENOMEM; | |
356 | memcpy(skb_put(skb, len), data, len); | |
357 | } | |
358 | ||
359 | return 0; | |
360 | } | |
361 | ||
bf7cd94d | 362 | int mesh_add_rsn_ie(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb) |
082ebb0c TP |
363 | { |
364 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
365 | u8 len = 0; | |
366 | const u8 *data; | |
367 | ||
368 | if (!ifmsh->ie || !ifmsh->ie_len) | |
369 | return 0; | |
370 | ||
371 | /* find RSN IE */ | |
a40a8c17 BC |
372 | data = cfg80211_find_ie(WLAN_EID_RSN, ifmsh->ie, ifmsh->ie_len); |
373 | if (!data) | |
374 | return 0; | |
082ebb0c | 375 | |
a40a8c17 BC |
376 | len = data[1] + 2; |
377 | ||
378 | if (skb_tailroom(skb) < len) | |
379 | return -ENOMEM; | |
380 | memcpy(skb_put(skb, len), data, len); | |
082ebb0c TP |
381 | |
382 | return 0; | |
383 | } | |
384 | ||
bf7cd94d JB |
385 | static int mesh_add_ds_params_ie(struct ieee80211_sub_if_data *sdata, |
386 | struct sk_buff *skb) | |
082ebb0c | 387 | { |
55de908a JB |
388 | struct ieee80211_chanctx_conf *chanctx_conf; |
389 | struct ieee80211_channel *chan; | |
082ebb0c | 390 | u8 *pos; |
2e3c8736 | 391 | |
082ebb0c TP |
392 | if (skb_tailroom(skb) < 3) |
393 | return -ENOMEM; | |
394 | ||
55de908a JB |
395 | rcu_read_lock(); |
396 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
397 | if (WARN_ON(!chanctx_conf)) { | |
398 | rcu_read_unlock(); | |
399 | return -EINVAL; | |
400 | } | |
4bf88530 | 401 | chan = chanctx_conf->def.chan; |
55de908a JB |
402 | rcu_read_unlock(); |
403 | ||
601513aa ET |
404 | pos = skb_put(skb, 2 + 1); |
405 | *pos++ = WLAN_EID_DS_PARAMS; | |
406 | *pos++ = 1; | |
407 | *pos++ = ieee80211_frequency_to_channel(chan->center_freq); | |
be125c60 | 408 | |
082ebb0c | 409 | return 0; |
2e3c8736 LCC |
410 | } |
411 | ||
bf7cd94d JB |
412 | int mesh_add_ht_cap_ie(struct ieee80211_sub_if_data *sdata, |
413 | struct sk_buff *skb) | |
176f3608 TP |
414 | { |
415 | struct ieee80211_local *local = sdata->local; | |
55de908a | 416 | enum ieee80211_band band = ieee80211_get_sdata_band(sdata); |
176f3608 TP |
417 | struct ieee80211_supported_band *sband; |
418 | u8 *pos; | |
419 | ||
55de908a | 420 | sband = local->hw.wiphy->bands[band]; |
176f3608 | 421 | if (!sband->ht_cap.ht_supported || |
0418a445 SW |
422 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT || |
423 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 || | |
424 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10) | |
176f3608 TP |
425 | return 0; |
426 | ||
427 | if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_ht_cap)) | |
428 | return -ENOMEM; | |
429 | ||
430 | pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_cap)); | |
ef96a842 | 431 | ieee80211_ie_build_ht_cap(pos, &sband->ht_cap, sband->ht_cap.cap); |
176f3608 TP |
432 | |
433 | return 0; | |
434 | } | |
435 | ||
bf7cd94d JB |
436 | int mesh_add_ht_oper_ie(struct ieee80211_sub_if_data *sdata, |
437 | struct sk_buff *skb) | |
176f3608 TP |
438 | { |
439 | struct ieee80211_local *local = sdata->local; | |
55de908a JB |
440 | struct ieee80211_chanctx_conf *chanctx_conf; |
441 | struct ieee80211_channel *channel; | |
55de908a JB |
442 | struct ieee80211_supported_band *sband; |
443 | struct ieee80211_sta_ht_cap *ht_cap; | |
176f3608 TP |
444 | u8 *pos; |
445 | ||
55de908a JB |
446 | rcu_read_lock(); |
447 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
448 | if (WARN_ON(!chanctx_conf)) { | |
449 | rcu_read_unlock(); | |
450 | return -EINVAL; | |
451 | } | |
4bf88530 | 452 | channel = chanctx_conf->def.chan; |
55de908a JB |
453 | rcu_read_unlock(); |
454 | ||
455 | sband = local->hw.wiphy->bands[channel->band]; | |
456 | ht_cap = &sband->ht_cap; | |
457 | ||
c85fb53c BC |
458 | if (!ht_cap->ht_supported || |
459 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT || | |
460 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 || | |
461 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10) | |
176f3608 TP |
462 | return 0; |
463 | ||
074d46d1 | 464 | if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_ht_operation)) |
176f3608 TP |
465 | return -ENOMEM; |
466 | ||
074d46d1 | 467 | pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_operation)); |
4bf88530 | 468 | ieee80211_ie_build_ht_oper(pos, ht_cap, &sdata->vif.bss_conf.chandef, |
57f255f5 AN |
469 | sdata->vif.bss_conf.ht_operation_mode, |
470 | false); | |
176f3608 TP |
471 | |
472 | return 0; | |
473 | } | |
bf7cd94d | 474 | |
c85fb53c BC |
475 | int mesh_add_vht_cap_ie(struct ieee80211_sub_if_data *sdata, |
476 | struct sk_buff *skb) | |
477 | { | |
478 | struct ieee80211_local *local = sdata->local; | |
479 | enum ieee80211_band band = ieee80211_get_sdata_band(sdata); | |
480 | struct ieee80211_supported_band *sband; | |
481 | u8 *pos; | |
482 | ||
483 | sband = local->hw.wiphy->bands[band]; | |
484 | if (!sband->vht_cap.vht_supported || | |
485 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT || | |
486 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 || | |
487 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10) | |
488 | return 0; | |
489 | ||
490 | if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_vht_cap)) | |
491 | return -ENOMEM; | |
492 | ||
493 | pos = skb_put(skb, 2 + sizeof(struct ieee80211_vht_cap)); | |
494 | ieee80211_ie_build_vht_cap(pos, &sband->vht_cap, sband->vht_cap.cap); | |
495 | ||
496 | return 0; | |
497 | } | |
498 | ||
499 | int mesh_add_vht_oper_ie(struct ieee80211_sub_if_data *sdata, | |
500 | struct sk_buff *skb) | |
501 | { | |
502 | struct ieee80211_local *local = sdata->local; | |
503 | struct ieee80211_chanctx_conf *chanctx_conf; | |
504 | struct ieee80211_channel *channel; | |
505 | struct ieee80211_supported_band *sband; | |
506 | struct ieee80211_sta_vht_cap *vht_cap; | |
507 | u8 *pos; | |
508 | ||
509 | rcu_read_lock(); | |
510 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
511 | if (WARN_ON(!chanctx_conf)) { | |
512 | rcu_read_unlock(); | |
513 | return -EINVAL; | |
514 | } | |
515 | channel = chanctx_conf->def.chan; | |
516 | rcu_read_unlock(); | |
517 | ||
518 | sband = local->hw.wiphy->bands[channel->band]; | |
519 | vht_cap = &sband->vht_cap; | |
520 | ||
521 | if (!vht_cap->vht_supported || | |
522 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT || | |
523 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 || | |
524 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10) | |
525 | return 0; | |
526 | ||
527 | if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_vht_operation)) | |
528 | return -ENOMEM; | |
529 | ||
530 | pos = skb_put(skb, 2 + sizeof(struct ieee80211_vht_operation)); | |
531 | ieee80211_ie_build_vht_oper(pos, vht_cap, | |
532 | &sdata->vif.bss_conf.chandef); | |
533 | ||
534 | return 0; | |
535 | } | |
536 | ||
2e3c8736 LCC |
537 | static void ieee80211_mesh_path_timer(unsigned long data) |
538 | { | |
539 | struct ieee80211_sub_if_data *sdata = | |
540 | (struct ieee80211_sub_if_data *) data; | |
5bb644a0 | 541 | |
690205f1 | 542 | ieee80211_queue_work(&sdata->local->hw, &sdata->work); |
2e3c8736 LCC |
543 | } |
544 | ||
e304bfd3 RP |
545 | static void ieee80211_mesh_path_root_timer(unsigned long data) |
546 | { | |
547 | struct ieee80211_sub_if_data *sdata = | |
548 | (struct ieee80211_sub_if_data *) data; | |
549 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
e304bfd3 RP |
550 | |
551 | set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); | |
552 | ||
690205f1 | 553 | ieee80211_queue_work(&sdata->local->hw, &sdata->work); |
e304bfd3 RP |
554 | } |
555 | ||
63c5723b RP |
556 | void ieee80211_mesh_root_setup(struct ieee80211_if_mesh *ifmsh) |
557 | { | |
dbb912cd | 558 | if (ifmsh->mshcfg.dot11MeshHWMPRootMode > IEEE80211_ROOTMODE_ROOT) |
63c5723b RP |
559 | set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); |
560 | else { | |
561 | clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); | |
562 | /* stop running timer */ | |
563 | del_timer_sync(&ifmsh->mesh_path_root_timer); | |
564 | } | |
565 | } | |
566 | ||
3c5772a5 JC |
567 | /** |
568 | * ieee80211_fill_mesh_addresses - fill addresses of a locally originated mesh frame | |
bf7cd94d | 569 | * @hdr: 802.11 frame header |
3c5772a5 JC |
570 | * @fc: frame control field |
571 | * @meshda: destination address in the mesh | |
572 | * @meshsa: source address address in the mesh. Same as TA, as frame is | |
573 | * locally originated. | |
574 | * | |
575 | * Return the length of the 802.11 (does not include a mesh control header) | |
576 | */ | |
15ff6365 JB |
577 | int ieee80211_fill_mesh_addresses(struct ieee80211_hdr *hdr, __le16 *fc, |
578 | const u8 *meshda, const u8 *meshsa) | |
579 | { | |
3c5772a5 JC |
580 | if (is_multicast_ether_addr(meshda)) { |
581 | *fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS); | |
582 | /* DA TA SA */ | |
583 | memcpy(hdr->addr1, meshda, ETH_ALEN); | |
584 | memcpy(hdr->addr2, meshsa, ETH_ALEN); | |
585 | memcpy(hdr->addr3, meshsa, ETH_ALEN); | |
586 | return 24; | |
587 | } else { | |
2154c81c | 588 | *fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); |
3c5772a5 | 589 | /* RA TA DA SA */ |
c84a67a2 | 590 | eth_zero_addr(hdr->addr1); /* RA is resolved later */ |
3c5772a5 JC |
591 | memcpy(hdr->addr2, meshsa, ETH_ALEN); |
592 | memcpy(hdr->addr3, meshda, ETH_ALEN); | |
593 | memcpy(hdr->addr4, meshsa, ETH_ALEN); | |
594 | return 30; | |
595 | } | |
596 | } | |
597 | ||
902acc78 JB |
598 | /** |
599 | * ieee80211_new_mesh_header - create a new mesh header | |
902acc78 | 600 | * @sdata: mesh interface to be used |
bf7cd94d | 601 | * @meshhdr: uninitialized mesh header |
61ad5394 JC |
602 | * @addr4or5: 1st address in the ae header, which may correspond to address 4 |
603 | * (if addr6 is NULL) or address 5 (if addr6 is present). It may | |
604 | * be NULL. | |
605 | * @addr6: 2nd address in the ae header, which corresponds to addr6 of the | |
606 | * mesh frame | |
902acc78 JB |
607 | * |
608 | * Return the header length. | |
609 | */ | |
5edfcee5 AH |
610 | unsigned int ieee80211_new_mesh_header(struct ieee80211_sub_if_data *sdata, |
611 | struct ieee80211s_hdr *meshhdr, | |
612 | const char *addr4or5, const char *addr6) | |
902acc78 | 613 | { |
bf7cd94d JB |
614 | if (WARN_ON(!addr4or5 && addr6)) |
615 | return 0; | |
616 | ||
0c3cee72 | 617 | memset(meshhdr, 0, sizeof(*meshhdr)); |
bf7cd94d | 618 | |
472dbc45 | 619 | meshhdr->ttl = sdata->u.mesh.mshcfg.dot11MeshTTL; |
bf7cd94d JB |
620 | |
621 | /* FIXME: racy -- TX on multiple queues can be concurrent */ | |
472dbc45 JB |
622 | put_unaligned(cpu_to_le32(sdata->u.mesh.mesh_seqnum), &meshhdr->seqnum); |
623 | sdata->u.mesh.mesh_seqnum++; | |
bf7cd94d | 624 | |
61ad5394 | 625 | if (addr4or5 && !addr6) { |
3c5772a5 | 626 | meshhdr->flags |= MESH_FLAGS_AE_A4; |
61ad5394 | 627 | memcpy(meshhdr->eaddr1, addr4or5, ETH_ALEN); |
bf7cd94d | 628 | return 2 * ETH_ALEN; |
61ad5394 | 629 | } else if (addr4or5 && addr6) { |
3c5772a5 | 630 | meshhdr->flags |= MESH_FLAGS_AE_A5_A6; |
61ad5394 JC |
631 | memcpy(meshhdr->eaddr1, addr4or5, ETH_ALEN); |
632 | memcpy(meshhdr->eaddr2, addr6, ETH_ALEN); | |
bf7cd94d | 633 | return 3 * ETH_ALEN; |
3c5772a5 | 634 | } |
bf7cd94d JB |
635 | |
636 | return ETH_ALEN; | |
902acc78 JB |
637 | } |
638 | ||
bf7cd94d | 639 | static void ieee80211_mesh_housekeeping(struct ieee80211_sub_if_data *sdata) |
472dbc45 | 640 | { |
bf7cd94d | 641 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
df323818 | 642 | u32 changed; |
472dbc45 | 643 | |
31f909a2 MH |
644 | if (ifmsh->mshcfg.plink_timeout > 0) |
645 | ieee80211_sta_expire(sdata, ifmsh->mshcfg.plink_timeout * HZ); | |
472dbc45 JB |
646 | mesh_path_expire(sdata); |
647 | ||
df323818 | 648 | changed = mesh_accept_plinks_update(sdata); |
2b5e1967 | 649 | ieee80211_mbss_info_change_notify(sdata, changed); |
472dbc45 | 650 | |
472dbc45 | 651 | mod_timer(&ifmsh->housekeeping_timer, |
bf7cd94d JB |
652 | round_jiffies(jiffies + |
653 | IEEE80211_MESH_HOUSEKEEPING_INTERVAL)); | |
472dbc45 JB |
654 | } |
655 | ||
e304bfd3 RP |
656 | static void ieee80211_mesh_rootpath(struct ieee80211_sub_if_data *sdata) |
657 | { | |
658 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
a69cc44f | 659 | u32 interval; |
e304bfd3 RP |
660 | |
661 | mesh_path_tx_root_frame(sdata); | |
a69cc44f CYY |
662 | |
663 | if (ifmsh->mshcfg.dot11MeshHWMPRootMode == IEEE80211_PROACTIVE_RANN) | |
664 | interval = ifmsh->mshcfg.dot11MeshHWMPRannInterval; | |
665 | else | |
666 | interval = ifmsh->mshcfg.dot11MeshHWMProotInterval; | |
667 | ||
e304bfd3 | 668 | mod_timer(&ifmsh->mesh_path_root_timer, |
a69cc44f | 669 | round_jiffies(TU_TO_EXP_TIME(interval))); |
e304bfd3 RP |
670 | } |
671 | ||
2b5e1967 TP |
672 | static int |
673 | ieee80211_mesh_build_beacon(struct ieee80211_if_mesh *ifmsh) | |
674 | { | |
675 | struct beacon_data *bcn; | |
676 | int head_len, tail_len; | |
677 | struct sk_buff *skb; | |
678 | struct ieee80211_mgmt *mgmt; | |
679 | struct ieee80211_chanctx_conf *chanctx_conf; | |
b8456a14 | 680 | struct mesh_csa_settings *csa; |
2b5e1967 TP |
681 | enum ieee80211_band band; |
682 | u8 *pos; | |
683 | struct ieee80211_sub_if_data *sdata; | |
684 | int hdr_len = offsetof(struct ieee80211_mgmt, u.beacon) + | |
685 | sizeof(mgmt->u.beacon); | |
686 | ||
687 | sdata = container_of(ifmsh, struct ieee80211_sub_if_data, u.mesh); | |
688 | rcu_read_lock(); | |
689 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
690 | band = chanctx_conf->def.chan->band; | |
691 | rcu_read_unlock(); | |
692 | ||
693 | head_len = hdr_len + | |
694 | 2 + /* NULL SSID */ | |
b8456a14 CYY |
695 | /* Channel Switch Announcement */ |
696 | 2 + sizeof(struct ieee80211_channel_sw_ie) + | |
697 | /* Mesh Channel Swith Parameters */ | |
698 | 2 + sizeof(struct ieee80211_mesh_chansw_params_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 */ | |
725 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, hdr_len); | |
726 | memset(mgmt, 0, hdr_len); | |
727 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
728 | IEEE80211_STYPE_BEACON); | |
729 | eth_broadcast_addr(mgmt->da); | |
730 | memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); | |
731 | memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN); | |
732 | ieee80211_mps_set_frame_flags(sdata, NULL, (void *) mgmt); | |
733 | mgmt->u.beacon.beacon_int = | |
734 | cpu_to_le16(sdata->vif.bss_conf.beacon_int); | |
735 | mgmt->u.beacon.capab_info |= cpu_to_le16( | |
736 | sdata->u.mesh.security ? WLAN_CAPABILITY_PRIVACY : 0); | |
737 | ||
738 | pos = skb_put(skb, 2); | |
739 | *pos++ = WLAN_EID_SSID; | |
740 | *pos++ = 0x0; | |
741 | ||
b8456a14 CYY |
742 | rcu_read_lock(); |
743 | csa = rcu_dereference(ifmsh->csa); | |
744 | if (csa) { | |
b8456a14 CYY |
745 | pos = skb_put(skb, 13); |
746 | memset(pos, 0, 13); | |
747 | *pos++ = WLAN_EID_CHANNEL_SWITCH; | |
748 | *pos++ = 3; | |
749 | *pos++ = 0x0; | |
750 | *pos++ = ieee80211_frequency_to_channel( | |
751 | csa->settings.chandef.chan->center_freq); | |
8df734e8 | 752 | bcn->csa_current_counter = csa->settings.count; |
af296bdb | 753 | bcn->csa_counter_offsets[0] = hdr_len + 6; |
b8456a14 CYY |
754 | *pos++ = csa->settings.count; |
755 | *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; | |
756 | *pos++ = 6; | |
0cb4d4dc | 757 | if (ifmsh->csa_role == IEEE80211_MESH_CSA_ROLE_INIT) { |
b8456a14 CYY |
758 | *pos++ = ifmsh->mshcfg.dot11MeshTTL; |
759 | *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR; | |
760 | } else { | |
761 | *pos++ = ifmsh->chsw_ttl; | |
762 | } | |
763 | *pos++ |= csa->settings.block_tx ? | |
764 | WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00; | |
765 | put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); | |
766 | pos += 2; | |
ca91dc97 | 767 | put_unaligned_le16(ifmsh->pre_value, pos); |
b8456a14 CYY |
768 | pos += 2; |
769 | } | |
770 | rcu_read_unlock(); | |
771 | ||
2b5e1967 | 772 | if (ieee80211_add_srates_ie(sdata, skb, true, band) || |
bf7cd94d | 773 | mesh_add_ds_params_ie(sdata, skb)) |
2b5e1967 TP |
774 | goto out_free; |
775 | ||
776 | bcn->head_len = skb->len; | |
777 | memcpy(bcn->head, skb->data, bcn->head_len); | |
778 | ||
779 | /* now the tail */ | |
780 | skb_trim(skb, 0); | |
781 | bcn->tail = bcn->head + bcn->head_len; | |
782 | ||
783 | if (ieee80211_add_ext_srates_ie(sdata, skb, true, band) || | |
bf7cd94d JB |
784 | mesh_add_rsn_ie(sdata, skb) || |
785 | mesh_add_ht_cap_ie(sdata, skb) || | |
786 | mesh_add_ht_oper_ie(sdata, skb) || | |
787 | mesh_add_meshid_ie(sdata, skb) || | |
788 | mesh_add_meshconf_ie(sdata, skb) || | |
789 | mesh_add_awake_window_ie(sdata, skb) || | |
c85fb53c BC |
790 | mesh_add_vht_cap_ie(sdata, skb) || |
791 | mesh_add_vht_oper_ie(sdata, skb) || | |
bf7cd94d | 792 | mesh_add_vendor_ies(sdata, skb)) |
2b5e1967 TP |
793 | goto out_free; |
794 | ||
795 | bcn->tail_len = skb->len; | |
796 | memcpy(bcn->tail, skb->data, bcn->tail_len); | |
43552be1 TP |
797 | bcn->meshconf = (struct ieee80211_meshconf_ie *) |
798 | (bcn->tail + ifmsh->meshconf_offset); | |
2b5e1967 TP |
799 | |
800 | dev_kfree_skb(skb); | |
801 | rcu_assign_pointer(ifmsh->beacon, bcn); | |
802 | return 0; | |
803 | out_free: | |
804 | kfree(bcn); | |
805 | dev_kfree_skb(skb); | |
806 | return -ENOMEM; | |
807 | } | |
808 | ||
809 | static int | |
8d61ffa5 | 810 | ieee80211_mesh_rebuild_beacon(struct ieee80211_sub_if_data *sdata) |
2b5e1967 | 811 | { |
2b5e1967 TP |
812 | struct beacon_data *old_bcn; |
813 | int ret; | |
2b5e1967 | 814 | |
8d61ffa5 JB |
815 | old_bcn = rcu_dereference_protected(sdata->u.mesh.beacon, |
816 | lockdep_is_held(&sdata->wdev.mtx)); | |
817 | ret = ieee80211_mesh_build_beacon(&sdata->u.mesh); | |
2b5e1967 TP |
818 | if (ret) |
819 | /* just reuse old beacon */ | |
8d61ffa5 | 820 | return ret; |
2b5e1967 TP |
821 | |
822 | if (old_bcn) | |
823 | kfree_rcu(old_bcn, rcu_head); | |
8d61ffa5 | 824 | return 0; |
2b5e1967 TP |
825 | } |
826 | ||
827 | void ieee80211_mbss_info_change_notify(struct ieee80211_sub_if_data *sdata, | |
828 | u32 changed) | |
829 | { | |
f81a9ded TP |
830 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
831 | unsigned long bits = changed; | |
832 | u32 bit; | |
833 | ||
834 | if (!bits) | |
835 | return; | |
836 | ||
837 | /* if we race with running work, worst case this work becomes a noop */ | |
838 | for_each_set_bit(bit, &bits, sizeof(changed) * BITS_PER_BYTE) | |
839 | set_bit(bit, &ifmsh->mbss_changed); | |
840 | set_bit(MESH_WORK_MBSS_CHANGED, &ifmsh->wrkq_flags); | |
841 | ieee80211_queue_work(&sdata->local->hw, &sdata->work); | |
2b5e1967 TP |
842 | } |
843 | ||
844 | int ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata) | |
472dbc45 JB |
845 | { |
846 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
847 | struct ieee80211_local *local = sdata->local; | |
f4eabc91 CYY |
848 | u32 changed = BSS_CHANGED_BEACON | |
849 | BSS_CHANGED_BEACON_ENABLED | | |
850 | BSS_CHANGED_HT | | |
851 | BSS_CHANGED_BASIC_RATES | | |
852 | BSS_CHANGED_BEACON_INT; | |
472dbc45 | 853 | |
09b17470 JB |
854 | local->fif_other_bss++; |
855 | /* mesh ifaces must set allmulti to forward mcast traffic */ | |
856 | atomic_inc(&local->iff_allmultis); | |
857 | ieee80211_configure_filter(local); | |
858 | ||
c7108a71 | 859 | ifmsh->mesh_cc_id = 0; /* Disabled */ |
dbf498fb JC |
860 | /* register sync ops from extensible synchronization framework */ |
861 | ifmsh->sync_ops = ieee80211_mesh_sync_ops_get(ifmsh->mesh_sp_id); | |
862 | ifmsh->adjusting_tbtt = false; | |
863 | ifmsh->sync_offset_clockdrift_max = 0; | |
6b9ac442 | 864 | set_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags); |
63c5723b | 865 | ieee80211_mesh_root_setup(ifmsh); |
64592c8f | 866 | ieee80211_queue_work(&local->hw, &sdata->work); |
70c33eaa AN |
867 | sdata->vif.bss_conf.ht_operation_mode = |
868 | ifmsh->mshcfg.ht_opmode; | |
d6a83228 | 869 | sdata->vif.bss_conf.enable_beacon = true; |
f4eabc91 | 870 | |
39886b61 | 871 | changed |= ieee80211_mps_local_status_update(sdata); |
3f52b7e3 | 872 | |
2b5e1967 TP |
873 | if (ieee80211_mesh_build_beacon(ifmsh)) { |
874 | ieee80211_stop_mesh(sdata); | |
875 | return -ENOMEM; | |
876 | } | |
877 | ||
057d5f4b | 878 | ieee80211_recalc_dtim(local, sdata); |
f4eabc91 | 879 | ieee80211_bss_info_change_notify(sdata, changed); |
c405c629 JB |
880 | |
881 | netif_carrier_on(sdata->dev); | |
2b5e1967 | 882 | return 0; |
472dbc45 JB |
883 | } |
884 | ||
885 | void ieee80211_stop_mesh(struct ieee80211_sub_if_data *sdata) | |
886 | { | |
09b17470 | 887 | struct ieee80211_local *local = sdata->local; |
29cbe68c | 888 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
2b5e1967 | 889 | struct beacon_data *bcn; |
29cbe68c | 890 | |
c405c629 JB |
891 | netif_carrier_off(sdata->dev); |
892 | ||
0d466b9c | 893 | /* stop the beacon */ |
29cbe68c | 894 | ifmsh->mesh_id_len = 0; |
d6a83228 JB |
895 | sdata->vif.bss_conf.enable_beacon = false; |
896 | clear_bit(SDATA_STATE_OFFCHANNEL_BEACON_STOPPED, &sdata->state); | |
29cbe68c | 897 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON_ENABLED); |
2b5e1967 | 898 | bcn = rcu_dereference_protected(ifmsh->beacon, |
8d61ffa5 | 899 | lockdep_is_held(&sdata->wdev.mtx)); |
0c2bef46 | 900 | RCU_INIT_POINTER(ifmsh->beacon, NULL); |
2b5e1967 | 901 | kfree_rcu(bcn, rcu_head); |
0d466b9c TP |
902 | |
903 | /* flush STAs and mpaths on this iface */ | |
b998e8bb | 904 | sta_info_flush(sdata); |
0d466b9c | 905 | mesh_path_flush_by_iface(sdata); |
09b17470 | 906 | |
3f52b7e3 MP |
907 | /* free all potentially still buffered group-addressed frames */ |
908 | local->total_ps_buffered -= skb_queue_len(&ifmsh->ps.bc_buf); | |
909 | skb_queue_purge(&ifmsh->ps.bc_buf); | |
910 | ||
472dbc45 | 911 | del_timer_sync(&sdata->u.mesh.housekeeping_timer); |
e304bfd3 | 912 | del_timer_sync(&sdata->u.mesh.mesh_path_root_timer); |
dd4c9260 | 913 | del_timer_sync(&sdata->u.mesh.mesh_path_timer); |
09b17470 | 914 | |
f81a9ded TP |
915 | /* clear any mesh work (for next join) we may have accrued */ |
916 | ifmsh->wrkq_flags = 0; | |
917 | ifmsh->mbss_changed = 0; | |
918 | ||
09b17470 JB |
919 | local->fif_other_bss--; |
920 | atomic_dec(&local->iff_allmultis); | |
921 | ieee80211_configure_filter(local); | |
472dbc45 JB |
922 | } |
923 | ||
33a45867 CYY |
924 | static bool |
925 | ieee80211_mesh_process_chnswitch(struct ieee80211_sub_if_data *sdata, | |
926 | struct ieee802_11_elems *elems, bool beacon) | |
927 | { | |
928 | struct cfg80211_csa_settings params; | |
929 | struct ieee80211_csa_ie csa_ie; | |
33a45867 CYY |
930 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
931 | enum ieee80211_band band = ieee80211_get_sdata_band(sdata); | |
0cb4d4dc | 932 | int err; |
33a45867 CYY |
933 | u32 sta_flags; |
934 | ||
dbd72850 MK |
935 | sdata_assert_lock(sdata); |
936 | ||
33a45867 CYY |
937 | sta_flags = IEEE80211_STA_DISABLE_VHT; |
938 | switch (sdata->vif.bss_conf.chandef.width) { | |
939 | case NL80211_CHAN_WIDTH_20_NOHT: | |
940 | sta_flags |= IEEE80211_STA_DISABLE_HT; | |
941 | case NL80211_CHAN_WIDTH_20: | |
942 | sta_flags |= IEEE80211_STA_DISABLE_40MHZ; | |
943 | break; | |
944 | default: | |
945 | break; | |
946 | } | |
947 | ||
948 | memset(¶ms, 0, sizeof(params)); | |
949 | memset(&csa_ie, 0, sizeof(csa_ie)); | |
84469a45 | 950 | err = ieee80211_parse_ch_switch_ie(sdata, elems, band, |
33a45867 CYY |
951 | sta_flags, sdata->vif.addr, |
952 | &csa_ie); | |
953 | if (err < 0) | |
954 | return false; | |
955 | if (err) | |
956 | return false; | |
957 | ||
958 | params.chandef = csa_ie.chandef; | |
959 | params.count = csa_ie.count; | |
960 | ||
33a45867 CYY |
961 | if (!cfg80211_chandef_usable(sdata->local->hw.wiphy, ¶ms.chandef, |
962 | IEEE80211_CHAN_DISABLED)) { | |
963 | sdata_info(sdata, | |
964 | "mesh STA %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), aborting\n", | |
965 | sdata->vif.addr, | |
966 | params.chandef.chan->center_freq, | |
967 | params.chandef.width, | |
968 | params.chandef.center_freq1, | |
969 | params.chandef.center_freq2); | |
970 | return false; | |
971 | } | |
972 | ||
973 | err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy, | |
2beb6dab LC |
974 | ¶ms.chandef, |
975 | NL80211_IFTYPE_MESH_POINT); | |
33a45867 CYY |
976 | if (err < 0) |
977 | return false; | |
2beb6dab | 978 | if (err > 0) |
33a45867 CYY |
979 | /* TODO: DFS not (yet) supported */ |
980 | return false; | |
2beb6dab LC |
981 | |
982 | params.radar_required = err; | |
33a45867 | 983 | |
0cb4d4dc LC |
984 | if (cfg80211_chandef_identical(¶ms.chandef, |
985 | &sdata->vif.bss_conf.chandef)) { | |
986 | mcsa_dbg(sdata, | |
987 | "received csa with an identical chandef, ignoring\n"); | |
988 | return true; | |
989 | } | |
33a45867 CYY |
990 | |
991 | mcsa_dbg(sdata, | |
992 | "received channel switch announcement to go to channel %d MHz\n", | |
993 | params.chandef.chan->center_freq); | |
994 | ||
995 | params.block_tx = csa_ie.mode & WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT; | |
3f718fd8 | 996 | if (beacon) { |
33a45867 | 997 | ifmsh->chsw_ttl = csa_ie.ttl - 1; |
3f718fd8 CYY |
998 | if (ifmsh->pre_value >= csa_ie.pre_value) |
999 | return false; | |
1000 | ifmsh->pre_value = csa_ie.pre_value; | |
1001 | } | |
33a45867 | 1002 | |
0cb4d4dc | 1003 | if (ifmsh->chsw_ttl >= ifmsh->mshcfg.dot11MeshTTL) |
3f718fd8 | 1004 | return false; |
33a45867 | 1005 | |
0cb4d4dc | 1006 | ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_REPEATER; |
33a45867 | 1007 | |
0cb4d4dc LC |
1008 | if (ieee80211_channel_switch(sdata->local->hw.wiphy, sdata->dev, |
1009 | ¶ms) < 0) | |
1010 | return false; | |
33a45867 CYY |
1011 | |
1012 | return true; | |
33a45867 CYY |
1013 | } |
1014 | ||
9fb04b50 TP |
1015 | static void |
1016 | ieee80211_mesh_rx_probe_req(struct ieee80211_sub_if_data *sdata, | |
1017 | struct ieee80211_mgmt *mgmt, size_t len) | |
1018 | { | |
1019 | struct ieee80211_local *local = sdata->local; | |
1020 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
1021 | struct sk_buff *presp; | |
1022 | struct beacon_data *bcn; | |
1023 | struct ieee80211_mgmt *hdr; | |
1024 | struct ieee802_11_elems elems; | |
1025 | size_t baselen; | |
511044ea | 1026 | u8 *pos; |
9fb04b50 | 1027 | |
9fb04b50 TP |
1028 | pos = mgmt->u.probe_req.variable; |
1029 | baselen = (u8 *) pos - (u8 *) mgmt; | |
1030 | if (baselen > len) | |
1031 | return; | |
1032 | ||
b2e506bf | 1033 | ieee802_11_parse_elems(pos, len - baselen, false, &elems); |
9fb04b50 | 1034 | |
a4ef66a9 CYY |
1035 | if (!elems.mesh_id) |
1036 | return; | |
1037 | ||
9fb04b50 TP |
1038 | /* 802.11-2012 10.1.4.3.2 */ |
1039 | if ((!ether_addr_equal(mgmt->da, sdata->vif.addr) && | |
1040 | !is_broadcast_ether_addr(mgmt->da)) || | |
1041 | elems.ssid_len != 0) | |
1042 | return; | |
1043 | ||
1044 | if (elems.mesh_id_len != 0 && | |
1045 | (elems.mesh_id_len != ifmsh->mesh_id_len || | |
1046 | memcmp(elems.mesh_id, ifmsh->mesh_id, ifmsh->mesh_id_len))) | |
1047 | return; | |
1048 | ||
1049 | rcu_read_lock(); | |
1050 | bcn = rcu_dereference(ifmsh->beacon); | |
1051 | ||
1052 | if (!bcn) | |
1053 | goto out; | |
1054 | ||
1055 | presp = dev_alloc_skb(local->tx_headroom + | |
1056 | bcn->head_len + bcn->tail_len); | |
1057 | if (!presp) | |
1058 | goto out; | |
1059 | ||
1060 | skb_reserve(presp, local->tx_headroom); | |
1061 | memcpy(skb_put(presp, bcn->head_len), bcn->head, bcn->head_len); | |
1062 | memcpy(skb_put(presp, bcn->tail_len), bcn->tail, bcn->tail_len); | |
1063 | hdr = (struct ieee80211_mgmt *) presp->data; | |
1064 | hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
1065 | IEEE80211_STYPE_PROBE_RESP); | |
1066 | memcpy(hdr->da, mgmt->sa, ETH_ALEN); | |
9fb04b50 TP |
1067 | IEEE80211_SKB_CB(presp)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
1068 | ieee80211_tx_skb(sdata, presp); | |
1069 | out: | |
1070 | rcu_read_unlock(); | |
1071 | } | |
1072 | ||
472dbc45 JB |
1073 | static void ieee80211_mesh_rx_bcn_presp(struct ieee80211_sub_if_data *sdata, |
1074 | u16 stype, | |
1075 | struct ieee80211_mgmt *mgmt, | |
1076 | size_t len, | |
1077 | struct ieee80211_rx_status *rx_status) | |
1078 | { | |
c6a1fa12 | 1079 | struct ieee80211_local *local = sdata->local; |
dbf498fb | 1080 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
472dbc45 JB |
1081 | struct ieee802_11_elems elems; |
1082 | struct ieee80211_channel *channel; | |
472dbc45 JB |
1083 | size_t baselen; |
1084 | int freq; | |
1085 | enum ieee80211_band band = rx_status->band; | |
1086 | ||
1087 | /* ignore ProbeResp to foreign address */ | |
1088 | if (stype == IEEE80211_STYPE_PROBE_RESP && | |
b203ca39 | 1089 | !ether_addr_equal(mgmt->da, sdata->vif.addr)) |
472dbc45 JB |
1090 | return; |
1091 | ||
1092 | baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; | |
1093 | if (baselen > len) | |
1094 | return; | |
1095 | ||
1096 | ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, | |
b2e506bf | 1097 | false, &elems); |
472dbc45 | 1098 | |
9a90bc81 TP |
1099 | /* ignore non-mesh or secure / unsecure mismatch */ |
1100 | if ((!elems.mesh_id || !elems.mesh_config) || | |
1101 | (elems.rsn && sdata->u.mesh.security == IEEE80211_MESH_SEC_NONE) || | |
1102 | (!elems.rsn && sdata->u.mesh.security != IEEE80211_MESH_SEC_NONE)) | |
5cff5e01 JC |
1103 | return; |
1104 | ||
1cd8e88e | 1105 | if (elems.ds_params) |
59eb21a6 | 1106 | freq = ieee80211_channel_to_frequency(elems.ds_params[0], band); |
472dbc45 JB |
1107 | else |
1108 | freq = rx_status->freq; | |
1109 | ||
1110 | channel = ieee80211_get_channel(local->hw.wiphy, freq); | |
1111 | ||
1112 | if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) | |
1113 | return; | |
1114 | ||
9a90bc81 | 1115 | if (mesh_matches_local(sdata, &elems)) |
f743ff49 | 1116 | mesh_neighbour_update(sdata, mgmt->sa, &elems); |
dbf498fb JC |
1117 | |
1118 | if (ifmsh->sync_ops) | |
1119 | ifmsh->sync_ops->rx_bcn_presp(sdata, | |
1120 | stype, mgmt, &elems, rx_status); | |
33a45867 | 1121 | |
0cb4d4dc LC |
1122 | if (ifmsh->csa_role != IEEE80211_MESH_CSA_ROLE_INIT && |
1123 | !sdata->vif.csa_active) | |
33a45867 | 1124 | ieee80211_mesh_process_chnswitch(sdata, &elems, true); |
472dbc45 JB |
1125 | } |
1126 | ||
b8456a14 CYY |
1127 | int ieee80211_mesh_finish_csa(struct ieee80211_sub_if_data *sdata) |
1128 | { | |
1129 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
1130 | struct mesh_csa_settings *tmp_csa_settings; | |
1131 | int ret = 0; | |
faf046e7 | 1132 | int changed = 0; |
b8456a14 CYY |
1133 | |
1134 | /* Reset the TTL value and Initiator flag */ | |
0cb4d4dc | 1135 | ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_NONE; |
b8456a14 CYY |
1136 | ifmsh->chsw_ttl = 0; |
1137 | ||
1138 | /* Remove the CSA and MCSP elements from the beacon */ | |
1139 | tmp_csa_settings = rcu_dereference(ifmsh->csa); | |
0c2bef46 | 1140 | RCU_INIT_POINTER(ifmsh->csa, NULL); |
66e01cf9 LC |
1141 | if (tmp_csa_settings) |
1142 | kfree_rcu(tmp_csa_settings, rcu_head); | |
b8456a14 CYY |
1143 | ret = ieee80211_mesh_rebuild_beacon(sdata); |
1144 | if (ret) | |
1145 | return -EINVAL; | |
1146 | ||
faf046e7 | 1147 | changed |= BSS_CHANGED_BEACON; |
b8456a14 CYY |
1148 | |
1149 | mcsa_dbg(sdata, "complete switching to center freq %d MHz", | |
1150 | sdata->vif.bss_conf.chandef.chan->center_freq); | |
faf046e7 | 1151 | return changed; |
b8456a14 CYY |
1152 | } |
1153 | ||
1154 | int ieee80211_mesh_csa_beacon(struct ieee80211_sub_if_data *sdata, | |
66e01cf9 | 1155 | struct cfg80211_csa_settings *csa_settings) |
b8456a14 CYY |
1156 | { |
1157 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
1158 | struct mesh_csa_settings *tmp_csa_settings; | |
1159 | int ret = 0; | |
1160 | ||
1161 | tmp_csa_settings = kmalloc(sizeof(*tmp_csa_settings), | |
1162 | GFP_ATOMIC); | |
1163 | if (!tmp_csa_settings) | |
1164 | return -ENOMEM; | |
1165 | ||
1166 | memcpy(&tmp_csa_settings->settings, csa_settings, | |
1167 | sizeof(struct cfg80211_csa_settings)); | |
1168 | ||
1169 | rcu_assign_pointer(ifmsh->csa, tmp_csa_settings); | |
1170 | ||
1171 | ret = ieee80211_mesh_rebuild_beacon(sdata); | |
1172 | if (ret) { | |
1173 | tmp_csa_settings = rcu_dereference(ifmsh->csa); | |
0c2bef46 | 1174 | RCU_INIT_POINTER(ifmsh->csa, NULL); |
b8456a14 CYY |
1175 | kfree_rcu(tmp_csa_settings, rcu_head); |
1176 | return ret; | |
1177 | } | |
1178 | ||
b58e81e9 | 1179 | return BSS_CHANGED_BEACON; |
b8456a14 CYY |
1180 | } |
1181 | ||
8f2535b9 CYY |
1182 | static int mesh_fwd_csa_frame(struct ieee80211_sub_if_data *sdata, |
1183 | struct ieee80211_mgmt *mgmt, size_t len) | |
1184 | { | |
1185 | struct ieee80211_mgmt *mgmt_fwd; | |
1186 | struct sk_buff *skb; | |
1187 | struct ieee80211_local *local = sdata->local; | |
1188 | u8 *pos = mgmt->u.action.u.chan_switch.variable; | |
1189 | size_t offset_ttl; | |
1190 | ||
1191 | skb = dev_alloc_skb(local->tx_headroom + len); | |
1192 | if (!skb) | |
1193 | return -ENOMEM; | |
1194 | skb_reserve(skb, local->tx_headroom); | |
1195 | mgmt_fwd = (struct ieee80211_mgmt *) skb_put(skb, len); | |
1196 | ||
1197 | /* offset_ttl is based on whether the secondary channel | |
b314c669 | 1198 | * offset is available or not. Subtract 1 from the mesh TTL |
8f2535b9 CYY |
1199 | * and disable the initiator flag before forwarding. |
1200 | */ | |
1201 | offset_ttl = (len < 42) ? 7 : 10; | |
1202 | *(pos + offset_ttl) -= 1; | |
1203 | *(pos + offset_ttl + 1) &= ~WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR; | |
1204 | ||
1205 | memcpy(mgmt_fwd, mgmt, len); | |
1206 | eth_broadcast_addr(mgmt_fwd->da); | |
1207 | memcpy(mgmt_fwd->sa, sdata->vif.addr, ETH_ALEN); | |
1208 | memcpy(mgmt_fwd->bssid, sdata->vif.addr, ETH_ALEN); | |
1209 | ||
1210 | ieee80211_tx_skb(sdata, skb); | |
1211 | return 0; | |
1212 | } | |
1213 | ||
1214 | static void mesh_rx_csa_frame(struct ieee80211_sub_if_data *sdata, | |
1215 | struct ieee80211_mgmt *mgmt, size_t len) | |
1216 | { | |
1217 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
1218 | struct ieee802_11_elems elems; | |
1219 | u16 pre_value; | |
33a45867 | 1220 | bool fwd_csa = true; |
8f2535b9 | 1221 | size_t baselen; |
3f718fd8 | 1222 | u8 *pos; |
8f2535b9 CYY |
1223 | |
1224 | if (mgmt->u.action.u.measurement.action_code != | |
1225 | WLAN_ACTION_SPCT_CHL_SWITCH) | |
1226 | return; | |
1227 | ||
1228 | pos = mgmt->u.action.u.chan_switch.variable; | |
1229 | baselen = offsetof(struct ieee80211_mgmt, | |
1230 | u.action.u.chan_switch.variable); | |
1231 | ieee802_11_parse_elems(pos, len - baselen, false, &elems); | |
1232 | ||
3f718fd8 CYY |
1233 | ifmsh->chsw_ttl = elems.mesh_chansw_params_ie->mesh_ttl; |
1234 | if (!--ifmsh->chsw_ttl) | |
8f2535b9 CYY |
1235 | fwd_csa = false; |
1236 | ||
1237 | pre_value = le16_to_cpu(elems.mesh_chansw_params_ie->mesh_pre_value); | |
1238 | if (ifmsh->pre_value >= pre_value) | |
1239 | return; | |
1240 | ||
1241 | ifmsh->pre_value = pre_value; | |
1242 | ||
0cb4d4dc LC |
1243 | if (!sdata->vif.csa_active && |
1244 | !ieee80211_mesh_process_chnswitch(sdata, &elems, false)) { | |
33a45867 CYY |
1245 | mcsa_dbg(sdata, "Failed to process CSA action frame"); |
1246 | return; | |
1247 | } | |
1248 | ||
8f2535b9 CYY |
1249 | /* forward or re-broadcast the CSA frame */ |
1250 | if (fwd_csa) { | |
1251 | if (mesh_fwd_csa_frame(sdata, mgmt, len) < 0) | |
1252 | mcsa_dbg(sdata, "Failed to forward the CSA frame"); | |
1253 | } | |
8f2535b9 CYY |
1254 | } |
1255 | ||
472dbc45 JB |
1256 | static void ieee80211_mesh_rx_mgmt_action(struct ieee80211_sub_if_data *sdata, |
1257 | struct ieee80211_mgmt *mgmt, | |
1258 | size_t len, | |
1259 | struct ieee80211_rx_status *rx_status) | |
1260 | { | |
1261 | switch (mgmt->u.action.category) { | |
8db09850 TP |
1262 | case WLAN_CATEGORY_SELF_PROTECTED: |
1263 | switch (mgmt->u.action.u.self_prot.action_code) { | |
1264 | case WLAN_SP_MESH_PEERING_OPEN: | |
1265 | case WLAN_SP_MESH_PEERING_CLOSE: | |
1266 | case WLAN_SP_MESH_PEERING_CONFIRM: | |
1267 | mesh_rx_plink_frame(sdata, mgmt, len, rx_status); | |
1268 | break; | |
1269 | } | |
472dbc45 | 1270 | break; |
25d49e4d TP |
1271 | case WLAN_CATEGORY_MESH_ACTION: |
1272 | if (mesh_action_is_path_sel(mgmt)) | |
1273 | mesh_rx_path_sel_frame(sdata, mgmt, len); | |
472dbc45 | 1274 | break; |
8f2535b9 CYY |
1275 | case WLAN_CATEGORY_SPECTRUM_MGMT: |
1276 | mesh_rx_csa_frame(sdata, mgmt, len); | |
1277 | break; | |
472dbc45 JB |
1278 | } |
1279 | } | |
1280 | ||
1fa57d01 JB |
1281 | void ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, |
1282 | struct sk_buff *skb) | |
472dbc45 JB |
1283 | { |
1284 | struct ieee80211_rx_status *rx_status; | |
472dbc45 JB |
1285 | struct ieee80211_mgmt *mgmt; |
1286 | u16 stype; | |
1287 | ||
ecccd072 TP |
1288 | sdata_lock(sdata); |
1289 | ||
1290 | /* mesh already went down */ | |
1693d344 | 1291 | if (!sdata->u.mesh.mesh_id_len) |
ecccd072 TP |
1292 | goto out; |
1293 | ||
f1d58c25 | 1294 | rx_status = IEEE80211_SKB_RXCB(skb); |
472dbc45 JB |
1295 | mgmt = (struct ieee80211_mgmt *) skb->data; |
1296 | stype = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE; | |
1297 | ||
1298 | switch (stype) { | |
1299 | case IEEE80211_STYPE_PROBE_RESP: | |
1300 | case IEEE80211_STYPE_BEACON: | |
1301 | ieee80211_mesh_rx_bcn_presp(sdata, stype, mgmt, skb->len, | |
1302 | rx_status); | |
1303 | break; | |
9fb04b50 TP |
1304 | case IEEE80211_STYPE_PROBE_REQ: |
1305 | ieee80211_mesh_rx_probe_req(sdata, mgmt, skb->len); | |
1306 | break; | |
472dbc45 JB |
1307 | case IEEE80211_STYPE_ACTION: |
1308 | ieee80211_mesh_rx_mgmt_action(sdata, mgmt, skb->len, rx_status); | |
1309 | break; | |
1310 | } | |
ecccd072 TP |
1311 | out: |
1312 | sdata_unlock(sdata); | |
472dbc45 JB |
1313 | } |
1314 | ||
f81a9ded TP |
1315 | static void mesh_bss_info_changed(struct ieee80211_sub_if_data *sdata) |
1316 | { | |
1317 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
1318 | u32 bit, changed = 0; | |
1319 | ||
1320 | for_each_set_bit(bit, &ifmsh->mbss_changed, | |
1321 | sizeof(changed) * BITS_PER_BYTE) { | |
1322 | clear_bit(bit, &ifmsh->mbss_changed); | |
1323 | changed |= BIT(bit); | |
1324 | } | |
1325 | ||
1326 | if (sdata->vif.bss_conf.enable_beacon && | |
1327 | (changed & (BSS_CHANGED_BEACON | | |
1328 | BSS_CHANGED_HT | | |
1329 | BSS_CHANGED_BASIC_RATES | | |
1330 | BSS_CHANGED_BEACON_INT))) | |
1331 | if (ieee80211_mesh_rebuild_beacon(sdata)) | |
1332 | return; | |
1333 | ||
1334 | ieee80211_bss_info_change_notify(sdata, changed); | |
1335 | } | |
1336 | ||
1fa57d01 | 1337 | void ieee80211_mesh_work(struct ieee80211_sub_if_data *sdata) |
472dbc45 | 1338 | { |
472dbc45 | 1339 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
472dbc45 | 1340 | |
ecccd072 TP |
1341 | sdata_lock(sdata); |
1342 | ||
1343 | /* mesh already went down */ | |
1693d344 | 1344 | if (!sdata->u.mesh.mesh_id_len) |
ecccd072 TP |
1345 | goto out; |
1346 | ||
472dbc45 JB |
1347 | if (ifmsh->preq_queue_len && |
1348 | time_after(jiffies, | |
1349 | ifmsh->last_preq + msecs_to_jiffies(ifmsh->mshcfg.dot11MeshHWMPpreqMinInterval))) | |
1350 | mesh_path_start_discovery(sdata); | |
1351 | ||
18889231 JC |
1352 | if (test_and_clear_bit(MESH_WORK_GROW_MPATH_TABLE, &ifmsh->wrkq_flags)) |
1353 | mesh_mpath_table_grow(); | |
1354 | ||
dcac908b | 1355 | if (test_and_clear_bit(MESH_WORK_GROW_MPP_TABLE, &ifmsh->wrkq_flags)) |
18889231 JC |
1356 | mesh_mpp_table_grow(); |
1357 | ||
1358 | if (test_and_clear_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags)) | |
bf7cd94d | 1359 | ieee80211_mesh_housekeeping(sdata); |
e304bfd3 RP |
1360 | |
1361 | if (test_and_clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags)) | |
1362 | ieee80211_mesh_rootpath(sdata); | |
dbf498fb JC |
1363 | |
1364 | if (test_and_clear_bit(MESH_WORK_DRIFT_ADJUST, &ifmsh->wrkq_flags)) | |
1365 | mesh_sync_adjust_tbtt(sdata); | |
ecccd072 | 1366 | |
f81a9ded TP |
1367 | if (test_and_clear_bit(MESH_WORK_MBSS_CHANGED, &ifmsh->wrkq_flags)) |
1368 | mesh_bss_info_changed(sdata); | |
ecccd072 TP |
1369 | out: |
1370 | sdata_unlock(sdata); | |
472dbc45 JB |
1371 | } |
1372 | ||
1373 | void ieee80211_mesh_notify_scan_completed(struct ieee80211_local *local) | |
1374 | { | |
1375 | struct ieee80211_sub_if_data *sdata; | |
1376 | ||
1377 | rcu_read_lock(); | |
1378 | list_for_each_entry_rcu(sdata, &local->interfaces, list) | |
370bd005 BG |
1379 | if (ieee80211_vif_is_mesh(&sdata->vif) && |
1380 | ieee80211_sdata_running(sdata)) | |
64592c8f | 1381 | ieee80211_queue_work(&local->hw, &sdata->work); |
472dbc45 JB |
1382 | rcu_read_unlock(); |
1383 | } | |
1384 | ||
902acc78 JB |
1385 | void ieee80211_mesh_init_sdata(struct ieee80211_sub_if_data *sdata) |
1386 | { | |
472dbc45 | 1387 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
ad2d223a | 1388 | static u8 zero_addr[ETH_ALEN] = {}; |
472dbc45 | 1389 | |
472dbc45 JB |
1390 | setup_timer(&ifmsh->housekeeping_timer, |
1391 | ieee80211_mesh_housekeeping_timer, | |
1392 | (unsigned long) sdata); | |
472dbc45 | 1393 | |
472dbc45 | 1394 | ifmsh->accepting_plinks = true; |
472dbc45 | 1395 | atomic_set(&ifmsh->mpaths, 0); |
f698d856 | 1396 | mesh_rmc_init(sdata); |
472dbc45 | 1397 | ifmsh->last_preq = jiffies; |
dca7e943 | 1398 | ifmsh->next_perr = jiffies; |
0cb4d4dc | 1399 | ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_NONE; |
902acc78 JB |
1400 | /* Allocate all mesh structures when creating the first mesh interface. */ |
1401 | if (!mesh_allocated) | |
1402 | ieee80211s_init(); | |
472dbc45 | 1403 | setup_timer(&ifmsh->mesh_path_timer, |
902acc78 JB |
1404 | ieee80211_mesh_path_timer, |
1405 | (unsigned long) sdata); | |
e304bfd3 RP |
1406 | setup_timer(&ifmsh->mesh_path_root_timer, |
1407 | ieee80211_mesh_path_root_timer, | |
1408 | (unsigned long) sdata); | |
472dbc45 | 1409 | INIT_LIST_HEAD(&ifmsh->preq_queue.list); |
3f52b7e3 | 1410 | skb_queue_head_init(&ifmsh->ps.bc_buf); |
472dbc45 | 1411 | spin_lock_init(&ifmsh->mesh_preq_queue_lock); |
dbf498fb | 1412 | spin_lock_init(&ifmsh->sync_offset_lock); |
2b5e1967 | 1413 | RCU_INIT_POINTER(ifmsh->beacon, NULL); |
ad2d223a JB |
1414 | |
1415 | sdata->vif.bss_conf.bssid = zero_addr; | |
472dbc45 | 1416 | } |