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" | |
15 | ||
bf7cd94d | 16 | static int mesh_allocated; |
2e3c8736 LCC |
17 | static struct kmem_cache *rm_cache; |
18 | ||
25d49e4d TP |
19 | bool mesh_action_is_path_sel(struct ieee80211_mgmt *mgmt) |
20 | { | |
21 | return (mgmt->u.action.u.mesh_action.action_code == | |
22 | WLAN_MESH_ACTION_HWMP_PATH_SELECTION); | |
23 | } | |
25d49e4d | 24 | |
2e3c8736 LCC |
25 | void ieee80211s_init(void) |
26 | { | |
27 | mesh_pathtbl_init(); | |
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 | mesh_pathtbl_unregister(); |
38 | kmem_cache_destroy(rm_cache); | |
39 | } | |
40 | ||
472dbc45 JB |
41 | static void ieee80211_mesh_housekeeping_timer(unsigned long data) |
42 | { | |
43 | struct ieee80211_sub_if_data *sdata = (void *) data; | |
44 | struct ieee80211_local *local = sdata->local; | |
45 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
46 | ||
6b9ac442 | 47 | set_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags); |
5bb644a0 | 48 | |
64592c8f | 49 | ieee80211_queue_work(&local->hw, &sdata->work); |
472dbc45 JB |
50 | } |
51 | ||
2e3c8736 LCC |
52 | /** |
53 | * mesh_matches_local - check if the config of a mesh point matches ours | |
54 | * | |
f698d856 | 55 | * @sdata: local mesh subif |
f743ff49 | 56 | * @ie: information elements of a management frame from the mesh peer |
2e3c8736 LCC |
57 | * |
58 | * This function checks if the mesh configuration of a mesh point matches the | |
59 | * local mesh configuration, i.e. if both nodes belong to the same mesh network. | |
60 | */ | |
f743ff49 TP |
61 | bool mesh_matches_local(struct ieee80211_sub_if_data *sdata, |
62 | struct ieee802_11_elems *ie) | |
2e3c8736 | 63 | { |
472dbc45 | 64 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
f743ff49 | 65 | u32 basic_rates = 0; |
4bf88530 | 66 | struct cfg80211_chan_def sta_chan_def; |
2e3c8736 | 67 | |
2e3c8736 LCC |
68 | /* |
69 | * As support for each feature is added, check for matching | |
70 | * - On mesh config capabilities | |
71 | * - Power Save Support En | |
72 | * - Sync support enabled | |
73 | * - Sync support active | |
74 | * - Sync support required from peer | |
75 | * - MDA enabled | |
76 | * - Power management control on fc | |
77 | */ | |
739522ba TP |
78 | if (!(ifmsh->mesh_id_len == ie->mesh_id_len && |
79 | memcmp(ifmsh->mesh_id, ie->mesh_id, ie->mesh_id_len) == 0 && | |
80 | (ifmsh->mesh_pp_id == ie->mesh_config->meshconf_psel) && | |
81 | (ifmsh->mesh_pm_id == ie->mesh_config->meshconf_pmetric) && | |
82 | (ifmsh->mesh_cc_id == ie->mesh_config->meshconf_congest) && | |
83 | (ifmsh->mesh_sp_id == ie->mesh_config->meshconf_synch) && | |
84 | (ifmsh->mesh_auth_id == ie->mesh_config->meshconf_auth))) | |
bf7cd94d | 85 | return false; |
739522ba | 86 | |
2103dec1 | 87 | ieee80211_sta_get_rates(sdata, ie, ieee80211_get_sdata_band(sdata), |
f743ff49 TP |
88 | &basic_rates); |
89 | ||
fe40cb62 | 90 | if (sdata->vif.bss_conf.basic_rates != basic_rates) |
bf7cd94d | 91 | return false; |
fe40cb62 | 92 | |
4bf88530 JB |
93 | ieee80211_ht_oper_to_chandef(sdata->vif.bss_conf.chandef.chan, |
94 | ie->ht_operation, &sta_chan_def); | |
95 | ||
96 | if (!cfg80211_chandef_compatible(&sdata->vif.bss_conf.chandef, | |
97 | &sta_chan_def)) | |
bf7cd94d | 98 | return false; |
2e3c8736 | 99 | |
739522ba | 100 | return true; |
2e3c8736 LCC |
101 | } |
102 | ||
103 | /** | |
104 | * mesh_peer_accepts_plinks - check if an mp is willing to establish peer links | |
105 | * | |
106 | * @ie: information elements of a management frame from the mesh peer | |
2e3c8736 | 107 | */ |
f698d856 | 108 | bool mesh_peer_accepts_plinks(struct ieee802_11_elems *ie) |
2e3c8736 | 109 | { |
136cfa28 | 110 | return (ie->mesh_config->meshconf_cap & |
bf7cd94d | 111 | IEEE80211_MESHCONF_CAPAB_ACCEPT_PLINKS) != 0; |
2e3c8736 LCC |
112 | } |
113 | ||
114 | /** | |
2c53040f | 115 | * mesh_accept_plinks_update - update accepting_plink in local mesh beacons |
2e3c8736 | 116 | * |
d0709a65 | 117 | * @sdata: mesh interface in which mesh beacons are going to be updated |
df323818 MP |
118 | * |
119 | * Returns: beacon changed flag if the beacon content changed. | |
2e3c8736 | 120 | */ |
df323818 | 121 | u32 mesh_accept_plinks_update(struct ieee80211_sub_if_data *sdata) |
2e3c8736 | 122 | { |
2e3c8736 | 123 | bool free_plinks; |
df323818 | 124 | u32 changed = 0; |
2e3c8736 LCC |
125 | |
126 | /* In case mesh_plink_free_count > 0 and mesh_plinktbl_capacity == 0, | |
127 | * the mesh interface might be able to establish plinks with peers that | |
b4e08ea1 LCC |
128 | * are already on the table but are not on PLINK_ESTAB state. However, |
129 | * in general the mesh interface is not accepting peer link requests | |
130 | * from new peers, and that must be reflected in the beacon | |
2e3c8736 LCC |
131 | */ |
132 | free_plinks = mesh_plink_availables(sdata); | |
133 | ||
df323818 MP |
134 | if (free_plinks != sdata->u.mesh.accepting_plinks) { |
135 | sdata->u.mesh.accepting_plinks = free_plinks; | |
136 | changed = BSS_CHANGED_BEACON; | |
137 | } | |
138 | ||
139 | return changed; | |
2e3c8736 LCC |
140 | } |
141 | ||
45b5028e TP |
142 | /* |
143 | * mesh_sta_cleanup - clean up any mesh sta state | |
144 | * | |
145 | * @sta: mesh sta to clean up. | |
146 | */ | |
147 | void mesh_sta_cleanup(struct sta_info *sta) | |
148 | { | |
149 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
150 | u32 changed; | |
151 | ||
152 | /* | |
153 | * maybe userspace handles peer allocation and peering, but in either | |
154 | * case the beacon is still generated by the kernel and we might need | |
155 | * an update. | |
156 | */ | |
157 | changed = mesh_accept_plinks_update(sdata); | |
a6dad6a2 | 158 | if (!sdata->u.mesh.user_mpm) { |
45b5028e TP |
159 | changed |= mesh_plink_deactivate(sta); |
160 | del_timer_sync(&sta->plink_timer); | |
161 | } | |
162 | ||
f81a9ded | 163 | if (changed) |
2b5e1967 | 164 | ieee80211_mbss_info_change_notify(sdata, changed); |
45b5028e TP |
165 | } |
166 | ||
f698d856 | 167 | int mesh_rmc_init(struct ieee80211_sub_if_data *sdata) |
2e3c8736 | 168 | { |
2e3c8736 LCC |
169 | int i; |
170 | ||
472dbc45 JB |
171 | sdata->u.mesh.rmc = kmalloc(sizeof(struct mesh_rmc), GFP_KERNEL); |
172 | if (!sdata->u.mesh.rmc) | |
2e3c8736 | 173 | return -ENOMEM; |
472dbc45 | 174 | sdata->u.mesh.rmc->idx_mask = RMC_BUCKETS - 1; |
2e3c8736 | 175 | for (i = 0; i < RMC_BUCKETS; i++) |
b7cfcd11 | 176 | INIT_LIST_HEAD(&sdata->u.mesh.rmc->bucket[i]); |
2e3c8736 LCC |
177 | return 0; |
178 | } | |
179 | ||
f698d856 | 180 | void mesh_rmc_free(struct ieee80211_sub_if_data *sdata) |
2e3c8736 | 181 | { |
472dbc45 | 182 | struct mesh_rmc *rmc = sdata->u.mesh.rmc; |
2e3c8736 LCC |
183 | struct rmc_entry *p, *n; |
184 | int i; | |
185 | ||
472dbc45 | 186 | if (!sdata->u.mesh.rmc) |
2e3c8736 LCC |
187 | return; |
188 | ||
bf7cd94d | 189 | for (i = 0; i < RMC_BUCKETS; i++) { |
b7cfcd11 | 190 | list_for_each_entry_safe(p, n, &rmc->bucket[i], list) { |
2e3c8736 LCC |
191 | list_del(&p->list); |
192 | kmem_cache_free(rm_cache, p); | |
193 | } | |
bf7cd94d | 194 | } |
2e3c8736 LCC |
195 | |
196 | kfree(rmc); | |
472dbc45 | 197 | sdata->u.mesh.rmc = NULL; |
2e3c8736 LCC |
198 | } |
199 | ||
200 | /** | |
201 | * mesh_rmc_check - Check frame in recent multicast cache and add if absent. | |
202 | * | |
bf7cd94d | 203 | * @sdata: interface |
2e3c8736 LCC |
204 | * @sa: source address |
205 | * @mesh_hdr: mesh_header | |
206 | * | |
207 | * Returns: 0 if the frame is not in the cache, nonzero otherwise. | |
208 | * | |
209 | * Checks using the source address and the mesh sequence number if we have | |
210 | * received this frame lately. If the frame is not in the cache, it is added to | |
211 | * it. | |
212 | */ | |
bf7cd94d JB |
213 | int mesh_rmc_check(struct ieee80211_sub_if_data *sdata, |
214 | const u8 *sa, struct ieee80211s_hdr *mesh_hdr) | |
2e3c8736 | 215 | { |
472dbc45 | 216 | struct mesh_rmc *rmc = sdata->u.mesh.rmc; |
2e3c8736 LCC |
217 | u32 seqnum = 0; |
218 | int entries = 0; | |
219 | u8 idx; | |
220 | struct rmc_entry *p, *n; | |
221 | ||
222 | /* Don't care about endianness since only match matters */ | |
51ceddad LCC |
223 | memcpy(&seqnum, &mesh_hdr->seqnum, sizeof(mesh_hdr->seqnum)); |
224 | idx = le32_to_cpu(mesh_hdr->seqnum) & rmc->idx_mask; | |
b7cfcd11 | 225 | list_for_each_entry_safe(p, n, &rmc->bucket[idx], list) { |
2e3c8736 LCC |
226 | ++entries; |
227 | if (time_after(jiffies, p->exp_time) || | |
bf7cd94d | 228 | entries == RMC_QUEUE_MAX_LEN) { |
2e3c8736 LCC |
229 | list_del(&p->list); |
230 | kmem_cache_free(rm_cache, p); | |
231 | --entries; | |
bf7cd94d | 232 | } else if ((seqnum == p->seqnum) && ether_addr_equal(sa, p->sa)) |
2e3c8736 LCC |
233 | return -1; |
234 | } | |
235 | ||
236 | p = kmem_cache_alloc(rm_cache, GFP_ATOMIC); | |
d15b8459 | 237 | if (!p) |
2e3c8736 | 238 | return 0; |
d15b8459 | 239 | |
2e3c8736 LCC |
240 | p->seqnum = seqnum; |
241 | p->exp_time = jiffies + RMC_TIMEOUT; | |
242 | memcpy(p->sa, sa, ETH_ALEN); | |
b7cfcd11 | 243 | list_add(&p->list, &rmc->bucket[idx]); |
2e3c8736 LCC |
244 | return 0; |
245 | } | |
246 | ||
bf7cd94d JB |
247 | int mesh_add_meshconf_ie(struct ieee80211_sub_if_data *sdata, |
248 | struct sk_buff *skb) | |
082ebb0c TP |
249 | { |
250 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
251 | u8 *pos, neighbors; | |
252 | u8 meshconf_len = sizeof(struct ieee80211_meshconf_ie); | |
253 | ||
254 | if (skb_tailroom(skb) < 2 + meshconf_len) | |
255 | return -ENOMEM; | |
256 | ||
257 | pos = skb_put(skb, 2 + meshconf_len); | |
258 | *pos++ = WLAN_EID_MESH_CONFIG; | |
259 | *pos++ = meshconf_len; | |
260 | ||
261 | /* Active path selection protocol ID */ | |
262 | *pos++ = ifmsh->mesh_pp_id; | |
263 | /* Active path selection metric ID */ | |
264 | *pos++ = ifmsh->mesh_pm_id; | |
265 | /* Congestion control mode identifier */ | |
266 | *pos++ = ifmsh->mesh_cc_id; | |
267 | /* Synchronization protocol identifier */ | |
268 | *pos++ = ifmsh->mesh_sp_id; | |
269 | /* Authentication Protocol identifier */ | |
270 | *pos++ = ifmsh->mesh_auth_id; | |
271 | /* Mesh Formation Info - number of neighbors */ | |
1258d976 | 272 | neighbors = atomic_read(&ifmsh->estab_plinks); |
e05ecccd | 273 | neighbors = min_t(int, neighbors, IEEE80211_MAX_MESH_PEERINGS); |
082ebb0c TP |
274 | *pos++ = neighbors << 1; |
275 | /* Mesh capability */ | |
b60e527a CYY |
276 | *pos = 0x00; |
277 | *pos |= ifmsh->mshcfg.dot11MeshForwarding ? | |
278 | IEEE80211_MESHCONF_CAPAB_FORWARDING : 0x00; | |
dbf498fb | 279 | *pos |= ifmsh->accepting_plinks ? |
bf7cd94d | 280 | IEEE80211_MESHCONF_CAPAB_ACCEPT_PLINKS : 0x00; |
3f52b7e3 MP |
281 | /* Mesh PS mode. See IEEE802.11-2012 8.4.2.100.8 */ |
282 | *pos |= ifmsh->ps_peers_deep_sleep ? | |
bf7cd94d | 283 | IEEE80211_MESHCONF_CAPAB_POWER_SAVE_LEVEL : 0x00; |
dbf498fb | 284 | *pos++ |= ifmsh->adjusting_tbtt ? |
bf7cd94d | 285 | IEEE80211_MESHCONF_CAPAB_TBTT_ADJUSTING : 0x00; |
082ebb0c TP |
286 | *pos++ = 0x00; |
287 | ||
288 | return 0; | |
289 | } | |
290 | ||
bf7cd94d | 291 | int mesh_add_meshid_ie(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb) |
082ebb0c TP |
292 | { |
293 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
294 | u8 *pos; | |
295 | ||
296 | if (skb_tailroom(skb) < 2 + ifmsh->mesh_id_len) | |
297 | return -ENOMEM; | |
298 | ||
299 | pos = skb_put(skb, 2 + ifmsh->mesh_id_len); | |
300 | *pos++ = WLAN_EID_MESH_ID; | |
301 | *pos++ = ifmsh->mesh_id_len; | |
302 | if (ifmsh->mesh_id_len) | |
303 | memcpy(pos, ifmsh->mesh_id, ifmsh->mesh_id_len); | |
304 | ||
305 | return 0; | |
306 | } | |
307 | ||
bf7cd94d JB |
308 | static int mesh_add_awake_window_ie(struct ieee80211_sub_if_data *sdata, |
309 | struct sk_buff *skb) | |
3f52b7e3 MP |
310 | { |
311 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
312 | u8 *pos; | |
313 | ||
314 | /* see IEEE802.11-2012 13.14.6 */ | |
315 | if (ifmsh->ps_peers_light_sleep == 0 && | |
316 | ifmsh->ps_peers_deep_sleep == 0 && | |
317 | ifmsh->nonpeer_pm == NL80211_MESH_POWER_ACTIVE) | |
318 | return 0; | |
319 | ||
320 | if (skb_tailroom(skb) < 4) | |
321 | return -ENOMEM; | |
322 | ||
323 | pos = skb_put(skb, 2 + 2); | |
324 | *pos++ = WLAN_EID_MESH_AWAKE_WINDOW; | |
325 | *pos++ = 2; | |
326 | put_unaligned_le16(ifmsh->mshcfg.dot11MeshAwakeWindowDuration, pos); | |
327 | ||
328 | return 0; | |
329 | } | |
330 | ||
bf7cd94d JB |
331 | int mesh_add_vendor_ies(struct ieee80211_sub_if_data *sdata, |
332 | struct sk_buff *skb) | |
082ebb0c TP |
333 | { |
334 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
335 | u8 offset, len; | |
336 | const u8 *data; | |
337 | ||
338 | if (!ifmsh->ie || !ifmsh->ie_len) | |
339 | return 0; | |
340 | ||
341 | /* fast-forward to vendor IEs */ | |
342 | offset = ieee80211_ie_split_vendor(ifmsh->ie, ifmsh->ie_len, 0); | |
343 | ||
344 | if (offset) { | |
345 | len = ifmsh->ie_len - offset; | |
346 | data = ifmsh->ie + offset; | |
347 | if (skb_tailroom(skb) < len) | |
348 | return -ENOMEM; | |
349 | memcpy(skb_put(skb, len), data, len); | |
350 | } | |
351 | ||
352 | return 0; | |
353 | } | |
354 | ||
bf7cd94d | 355 | int mesh_add_rsn_ie(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb) |
082ebb0c TP |
356 | { |
357 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
358 | u8 len = 0; | |
359 | const u8 *data; | |
360 | ||
361 | if (!ifmsh->ie || !ifmsh->ie_len) | |
362 | return 0; | |
363 | ||
364 | /* find RSN IE */ | |
365 | data = ifmsh->ie; | |
366 | while (data < ifmsh->ie + ifmsh->ie_len) { | |
367 | if (*data == WLAN_EID_RSN) { | |
368 | len = data[1] + 2; | |
369 | break; | |
370 | } | |
371 | data++; | |
372 | } | |
373 | ||
374 | if (len) { | |
375 | if (skb_tailroom(skb) < len) | |
376 | return -ENOMEM; | |
377 | memcpy(skb_put(skb, len), data, len); | |
378 | } | |
379 | ||
380 | return 0; | |
381 | } | |
382 | ||
bf7cd94d JB |
383 | static int mesh_add_ds_params_ie(struct ieee80211_sub_if_data *sdata, |
384 | struct sk_buff *skb) | |
082ebb0c | 385 | { |
55de908a JB |
386 | struct ieee80211_chanctx_conf *chanctx_conf; |
387 | struct ieee80211_channel *chan; | |
082ebb0c | 388 | u8 *pos; |
2e3c8736 | 389 | |
082ebb0c TP |
390 | if (skb_tailroom(skb) < 3) |
391 | return -ENOMEM; | |
392 | ||
55de908a JB |
393 | rcu_read_lock(); |
394 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
395 | if (WARN_ON(!chanctx_conf)) { | |
396 | rcu_read_unlock(); | |
397 | return -EINVAL; | |
398 | } | |
4bf88530 | 399 | chan = chanctx_conf->def.chan; |
55de908a JB |
400 | rcu_read_unlock(); |
401 | ||
601513aa ET |
402 | pos = skb_put(skb, 2 + 1); |
403 | *pos++ = WLAN_EID_DS_PARAMS; | |
404 | *pos++ = 1; | |
405 | *pos++ = ieee80211_frequency_to_channel(chan->center_freq); | |
be125c60 | 406 | |
082ebb0c | 407 | return 0; |
2e3c8736 LCC |
408 | } |
409 | ||
bf7cd94d JB |
410 | int mesh_add_ht_cap_ie(struct ieee80211_sub_if_data *sdata, |
411 | struct sk_buff *skb) | |
176f3608 TP |
412 | { |
413 | struct ieee80211_local *local = sdata->local; | |
55de908a | 414 | enum ieee80211_band band = ieee80211_get_sdata_band(sdata); |
176f3608 TP |
415 | struct ieee80211_supported_band *sband; |
416 | u8 *pos; | |
417 | ||
55de908a | 418 | sband = local->hw.wiphy->bands[band]; |
176f3608 | 419 | if (!sband->ht_cap.ht_supported || |
0418a445 SW |
420 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT || |
421 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 || | |
422 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10) | |
176f3608 TP |
423 | return 0; |
424 | ||
425 | if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_ht_cap)) | |
426 | return -ENOMEM; | |
427 | ||
428 | pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_cap)); | |
ef96a842 | 429 | ieee80211_ie_build_ht_cap(pos, &sband->ht_cap, sband->ht_cap.cap); |
176f3608 TP |
430 | |
431 | return 0; | |
432 | } | |
433 | ||
bf7cd94d JB |
434 | int mesh_add_ht_oper_ie(struct ieee80211_sub_if_data *sdata, |
435 | struct sk_buff *skb) | |
176f3608 TP |
436 | { |
437 | struct ieee80211_local *local = sdata->local; | |
55de908a JB |
438 | struct ieee80211_chanctx_conf *chanctx_conf; |
439 | struct ieee80211_channel *channel; | |
466f310d | 440 | enum nl80211_channel_type channel_type = |
4bf88530 | 441 | cfg80211_get_chandef_type(&sdata->vif.bss_conf.chandef); |
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 | ||
176f3608 TP |
458 | if (!ht_cap->ht_supported || channel_type == NL80211_CHAN_NO_HT) |
459 | return 0; | |
460 | ||
074d46d1 | 461 | if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_ht_operation)) |
176f3608 TP |
462 | return -ENOMEM; |
463 | ||
074d46d1 | 464 | pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_operation)); |
4bf88530 | 465 | ieee80211_ie_build_ht_oper(pos, ht_cap, &sdata->vif.bss_conf.chandef, |
431e3154 | 466 | sdata->vif.bss_conf.ht_operation_mode); |
176f3608 TP |
467 | |
468 | return 0; | |
469 | } | |
bf7cd94d | 470 | |
2e3c8736 LCC |
471 | static void ieee80211_mesh_path_timer(unsigned long data) |
472 | { | |
473 | struct ieee80211_sub_if_data *sdata = | |
474 | (struct ieee80211_sub_if_data *) data; | |
5bb644a0 | 475 | |
690205f1 | 476 | ieee80211_queue_work(&sdata->local->hw, &sdata->work); |
2e3c8736 LCC |
477 | } |
478 | ||
e304bfd3 RP |
479 | static void ieee80211_mesh_path_root_timer(unsigned long data) |
480 | { | |
481 | struct ieee80211_sub_if_data *sdata = | |
482 | (struct ieee80211_sub_if_data *) data; | |
483 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
e304bfd3 RP |
484 | |
485 | set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); | |
486 | ||
690205f1 | 487 | ieee80211_queue_work(&sdata->local->hw, &sdata->work); |
e304bfd3 RP |
488 | } |
489 | ||
63c5723b RP |
490 | void ieee80211_mesh_root_setup(struct ieee80211_if_mesh *ifmsh) |
491 | { | |
dbb912cd | 492 | if (ifmsh->mshcfg.dot11MeshHWMPRootMode > IEEE80211_ROOTMODE_ROOT) |
63c5723b RP |
493 | set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); |
494 | else { | |
495 | clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); | |
496 | /* stop running timer */ | |
497 | del_timer_sync(&ifmsh->mesh_path_root_timer); | |
498 | } | |
499 | } | |
500 | ||
3c5772a5 JC |
501 | /** |
502 | * ieee80211_fill_mesh_addresses - fill addresses of a locally originated mesh frame | |
bf7cd94d | 503 | * @hdr: 802.11 frame header |
3c5772a5 JC |
504 | * @fc: frame control field |
505 | * @meshda: destination address in the mesh | |
506 | * @meshsa: source address address in the mesh. Same as TA, as frame is | |
507 | * locally originated. | |
508 | * | |
509 | * Return the length of the 802.11 (does not include a mesh control header) | |
510 | */ | |
15ff6365 JB |
511 | int ieee80211_fill_mesh_addresses(struct ieee80211_hdr *hdr, __le16 *fc, |
512 | const u8 *meshda, const u8 *meshsa) | |
513 | { | |
3c5772a5 JC |
514 | if (is_multicast_ether_addr(meshda)) { |
515 | *fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS); | |
516 | /* DA TA SA */ | |
517 | memcpy(hdr->addr1, meshda, ETH_ALEN); | |
518 | memcpy(hdr->addr2, meshsa, ETH_ALEN); | |
519 | memcpy(hdr->addr3, meshsa, ETH_ALEN); | |
520 | return 24; | |
521 | } else { | |
2154c81c | 522 | *fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); |
3c5772a5 JC |
523 | /* RA TA DA SA */ |
524 | memset(hdr->addr1, 0, ETH_ALEN); /* RA is resolved later */ | |
525 | memcpy(hdr->addr2, meshsa, ETH_ALEN); | |
526 | memcpy(hdr->addr3, meshda, ETH_ALEN); | |
527 | memcpy(hdr->addr4, meshsa, ETH_ALEN); | |
528 | return 30; | |
529 | } | |
530 | } | |
531 | ||
902acc78 JB |
532 | /** |
533 | * ieee80211_new_mesh_header - create a new mesh header | |
902acc78 | 534 | * @sdata: mesh interface to be used |
bf7cd94d | 535 | * @meshhdr: uninitialized mesh header |
61ad5394 JC |
536 | * @addr4or5: 1st address in the ae header, which may correspond to address 4 |
537 | * (if addr6 is NULL) or address 5 (if addr6 is present). It may | |
538 | * be NULL. | |
539 | * @addr6: 2nd address in the ae header, which corresponds to addr6 of the | |
540 | * mesh frame | |
902acc78 JB |
541 | * |
542 | * Return the header length. | |
543 | */ | |
bf7cd94d JB |
544 | int ieee80211_new_mesh_header(struct ieee80211_sub_if_data *sdata, |
545 | struct ieee80211s_hdr *meshhdr, | |
546 | const char *addr4or5, const char *addr6) | |
902acc78 | 547 | { |
bf7cd94d JB |
548 | if (WARN_ON(!addr4or5 && addr6)) |
549 | return 0; | |
550 | ||
0c3cee72 | 551 | memset(meshhdr, 0, sizeof(*meshhdr)); |
bf7cd94d | 552 | |
472dbc45 | 553 | meshhdr->ttl = sdata->u.mesh.mshcfg.dot11MeshTTL; |
bf7cd94d JB |
554 | |
555 | /* FIXME: racy -- TX on multiple queues can be concurrent */ | |
472dbc45 JB |
556 | put_unaligned(cpu_to_le32(sdata->u.mesh.mesh_seqnum), &meshhdr->seqnum); |
557 | sdata->u.mesh.mesh_seqnum++; | |
bf7cd94d | 558 | |
61ad5394 | 559 | if (addr4or5 && !addr6) { |
3c5772a5 | 560 | meshhdr->flags |= MESH_FLAGS_AE_A4; |
61ad5394 | 561 | memcpy(meshhdr->eaddr1, addr4or5, ETH_ALEN); |
bf7cd94d | 562 | return 2 * ETH_ALEN; |
61ad5394 | 563 | } else if (addr4or5 && addr6) { |
3c5772a5 | 564 | meshhdr->flags |= MESH_FLAGS_AE_A5_A6; |
61ad5394 JC |
565 | memcpy(meshhdr->eaddr1, addr4or5, ETH_ALEN); |
566 | memcpy(meshhdr->eaddr2, addr6, ETH_ALEN); | |
bf7cd94d | 567 | return 3 * ETH_ALEN; |
3c5772a5 | 568 | } |
bf7cd94d JB |
569 | |
570 | return ETH_ALEN; | |
902acc78 JB |
571 | } |
572 | ||
bf7cd94d | 573 | static void ieee80211_mesh_housekeeping(struct ieee80211_sub_if_data *sdata) |
472dbc45 | 574 | { |
bf7cd94d | 575 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
df323818 | 576 | u32 changed; |
472dbc45 | 577 | |
66de6713 | 578 | ieee80211_sta_expire(sdata, ifmsh->mshcfg.plink_timeout * HZ); |
472dbc45 JB |
579 | mesh_path_expire(sdata); |
580 | ||
df323818 | 581 | changed = mesh_accept_plinks_update(sdata); |
2b5e1967 | 582 | ieee80211_mbss_info_change_notify(sdata, changed); |
472dbc45 | 583 | |
472dbc45 | 584 | mod_timer(&ifmsh->housekeeping_timer, |
bf7cd94d JB |
585 | round_jiffies(jiffies + |
586 | IEEE80211_MESH_HOUSEKEEPING_INTERVAL)); | |
472dbc45 JB |
587 | } |
588 | ||
e304bfd3 RP |
589 | static void ieee80211_mesh_rootpath(struct ieee80211_sub_if_data *sdata) |
590 | { | |
591 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
a69cc44f | 592 | u32 interval; |
e304bfd3 RP |
593 | |
594 | mesh_path_tx_root_frame(sdata); | |
a69cc44f CYY |
595 | |
596 | if (ifmsh->mshcfg.dot11MeshHWMPRootMode == IEEE80211_PROACTIVE_RANN) | |
597 | interval = ifmsh->mshcfg.dot11MeshHWMPRannInterval; | |
598 | else | |
599 | interval = ifmsh->mshcfg.dot11MeshHWMProotInterval; | |
600 | ||
e304bfd3 | 601 | mod_timer(&ifmsh->mesh_path_root_timer, |
a69cc44f | 602 | round_jiffies(TU_TO_EXP_TIME(interval))); |
e304bfd3 RP |
603 | } |
604 | ||
2b5e1967 TP |
605 | static int |
606 | ieee80211_mesh_build_beacon(struct ieee80211_if_mesh *ifmsh) | |
607 | { | |
608 | struct beacon_data *bcn; | |
609 | int head_len, tail_len; | |
610 | struct sk_buff *skb; | |
611 | struct ieee80211_mgmt *mgmt; | |
612 | struct ieee80211_chanctx_conf *chanctx_conf; | |
613 | enum ieee80211_band band; | |
614 | u8 *pos; | |
615 | struct ieee80211_sub_if_data *sdata; | |
616 | int hdr_len = offsetof(struct ieee80211_mgmt, u.beacon) + | |
617 | sizeof(mgmt->u.beacon); | |
618 | ||
619 | sdata = container_of(ifmsh, struct ieee80211_sub_if_data, u.mesh); | |
620 | rcu_read_lock(); | |
621 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
622 | band = chanctx_conf->def.chan->band; | |
623 | rcu_read_unlock(); | |
624 | ||
625 | head_len = hdr_len + | |
626 | 2 + /* NULL SSID */ | |
627 | 2 + 8 + /* supported rates */ | |
628 | 2 + 3; /* DS params */ | |
629 | tail_len = 2 + (IEEE80211_MAX_SUPP_RATES - 8) + | |
630 | 2 + sizeof(struct ieee80211_ht_cap) + | |
631 | 2 + sizeof(struct ieee80211_ht_operation) + | |
632 | 2 + ifmsh->mesh_id_len + | |
633 | 2 + sizeof(struct ieee80211_meshconf_ie) + | |
634 | 2 + sizeof(__le16) + /* awake window */ | |
635 | ifmsh->ie_len; | |
636 | ||
637 | bcn = kzalloc(sizeof(*bcn) + head_len + tail_len, GFP_KERNEL); | |
638 | /* need an skb for IE builders to operate on */ | |
639 | skb = dev_alloc_skb(max(head_len, tail_len)); | |
640 | ||
641 | if (!bcn || !skb) | |
642 | goto out_free; | |
643 | ||
644 | /* | |
645 | * pointers go into the block we allocated, | |
646 | * memory is | beacon_data | head | tail | | |
647 | */ | |
648 | bcn->head = ((u8 *) bcn) + sizeof(*bcn); | |
649 | ||
650 | /* fill in the head */ | |
651 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, hdr_len); | |
652 | memset(mgmt, 0, hdr_len); | |
653 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
654 | IEEE80211_STYPE_BEACON); | |
655 | eth_broadcast_addr(mgmt->da); | |
656 | memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); | |
657 | memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN); | |
658 | ieee80211_mps_set_frame_flags(sdata, NULL, (void *) mgmt); | |
659 | mgmt->u.beacon.beacon_int = | |
660 | cpu_to_le16(sdata->vif.bss_conf.beacon_int); | |
661 | mgmt->u.beacon.capab_info |= cpu_to_le16( | |
662 | sdata->u.mesh.security ? WLAN_CAPABILITY_PRIVACY : 0); | |
663 | ||
664 | pos = skb_put(skb, 2); | |
665 | *pos++ = WLAN_EID_SSID; | |
666 | *pos++ = 0x0; | |
667 | ||
668 | if (ieee80211_add_srates_ie(sdata, skb, true, band) || | |
bf7cd94d | 669 | mesh_add_ds_params_ie(sdata, skb)) |
2b5e1967 TP |
670 | goto out_free; |
671 | ||
672 | bcn->head_len = skb->len; | |
673 | memcpy(bcn->head, skb->data, bcn->head_len); | |
674 | ||
675 | /* now the tail */ | |
676 | skb_trim(skb, 0); | |
677 | bcn->tail = bcn->head + bcn->head_len; | |
678 | ||
679 | if (ieee80211_add_ext_srates_ie(sdata, skb, true, band) || | |
bf7cd94d JB |
680 | mesh_add_rsn_ie(sdata, skb) || |
681 | mesh_add_ht_cap_ie(sdata, skb) || | |
682 | mesh_add_ht_oper_ie(sdata, skb) || | |
683 | mesh_add_meshid_ie(sdata, skb) || | |
684 | mesh_add_meshconf_ie(sdata, skb) || | |
685 | mesh_add_awake_window_ie(sdata, skb) || | |
686 | mesh_add_vendor_ies(sdata, skb)) | |
2b5e1967 TP |
687 | goto out_free; |
688 | ||
689 | bcn->tail_len = skb->len; | |
690 | memcpy(bcn->tail, skb->data, bcn->tail_len); | |
691 | ||
692 | dev_kfree_skb(skb); | |
693 | rcu_assign_pointer(ifmsh->beacon, bcn); | |
694 | return 0; | |
695 | out_free: | |
696 | kfree(bcn); | |
697 | dev_kfree_skb(skb); | |
698 | return -ENOMEM; | |
699 | } | |
700 | ||
701 | static int | |
8d61ffa5 | 702 | ieee80211_mesh_rebuild_beacon(struct ieee80211_sub_if_data *sdata) |
2b5e1967 | 703 | { |
2b5e1967 TP |
704 | struct beacon_data *old_bcn; |
705 | int ret; | |
2b5e1967 | 706 | |
8d61ffa5 JB |
707 | old_bcn = rcu_dereference_protected(sdata->u.mesh.beacon, |
708 | lockdep_is_held(&sdata->wdev.mtx)); | |
709 | ret = ieee80211_mesh_build_beacon(&sdata->u.mesh); | |
2b5e1967 TP |
710 | if (ret) |
711 | /* just reuse old beacon */ | |
8d61ffa5 | 712 | return ret; |
2b5e1967 TP |
713 | |
714 | if (old_bcn) | |
715 | kfree_rcu(old_bcn, rcu_head); | |
8d61ffa5 | 716 | return 0; |
2b5e1967 TP |
717 | } |
718 | ||
719 | void ieee80211_mbss_info_change_notify(struct ieee80211_sub_if_data *sdata, | |
720 | u32 changed) | |
721 | { | |
f81a9ded TP |
722 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
723 | unsigned long bits = changed; | |
724 | u32 bit; | |
725 | ||
726 | if (!bits) | |
727 | return; | |
728 | ||
729 | /* if we race with running work, worst case this work becomes a noop */ | |
730 | for_each_set_bit(bit, &bits, sizeof(changed) * BITS_PER_BYTE) | |
731 | set_bit(bit, &ifmsh->mbss_changed); | |
732 | set_bit(MESH_WORK_MBSS_CHANGED, &ifmsh->wrkq_flags); | |
733 | ieee80211_queue_work(&sdata->local->hw, &sdata->work); | |
2b5e1967 TP |
734 | } |
735 | ||
736 | int ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata) | |
472dbc45 JB |
737 | { |
738 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
739 | struct ieee80211_local *local = sdata->local; | |
f4eabc91 CYY |
740 | u32 changed = BSS_CHANGED_BEACON | |
741 | BSS_CHANGED_BEACON_ENABLED | | |
742 | BSS_CHANGED_HT | | |
743 | BSS_CHANGED_BASIC_RATES | | |
744 | BSS_CHANGED_BEACON_INT; | |
472dbc45 | 745 | |
09b17470 JB |
746 | local->fif_other_bss++; |
747 | /* mesh ifaces must set allmulti to forward mcast traffic */ | |
748 | atomic_inc(&local->iff_allmultis); | |
749 | ieee80211_configure_filter(local); | |
750 | ||
c7108a71 | 751 | ifmsh->mesh_cc_id = 0; /* Disabled */ |
dbf498fb JC |
752 | /* register sync ops from extensible synchronization framework */ |
753 | ifmsh->sync_ops = ieee80211_mesh_sync_ops_get(ifmsh->mesh_sp_id); | |
754 | ifmsh->adjusting_tbtt = false; | |
755 | ifmsh->sync_offset_clockdrift_max = 0; | |
6b9ac442 | 756 | set_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags); |
63c5723b | 757 | ieee80211_mesh_root_setup(ifmsh); |
64592c8f | 758 | ieee80211_queue_work(&local->hw, &sdata->work); |
70c33eaa AN |
759 | sdata->vif.bss_conf.ht_operation_mode = |
760 | ifmsh->mshcfg.ht_opmode; | |
d6a83228 | 761 | sdata->vif.bss_conf.enable_beacon = true; |
f4eabc91 | 762 | |
39886b61 | 763 | changed |= ieee80211_mps_local_status_update(sdata); |
3f52b7e3 | 764 | |
2b5e1967 TP |
765 | if (ieee80211_mesh_build_beacon(ifmsh)) { |
766 | ieee80211_stop_mesh(sdata); | |
767 | return -ENOMEM; | |
768 | } | |
769 | ||
f4eabc91 | 770 | ieee80211_bss_info_change_notify(sdata, changed); |
c405c629 JB |
771 | |
772 | netif_carrier_on(sdata->dev); | |
2b5e1967 | 773 | return 0; |
472dbc45 JB |
774 | } |
775 | ||
776 | void ieee80211_stop_mesh(struct ieee80211_sub_if_data *sdata) | |
777 | { | |
09b17470 | 778 | struct ieee80211_local *local = sdata->local; |
29cbe68c | 779 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
2b5e1967 | 780 | struct beacon_data *bcn; |
29cbe68c | 781 | |
c405c629 JB |
782 | netif_carrier_off(sdata->dev); |
783 | ||
0d466b9c | 784 | /* stop the beacon */ |
29cbe68c | 785 | ifmsh->mesh_id_len = 0; |
d6a83228 JB |
786 | sdata->vif.bss_conf.enable_beacon = false; |
787 | clear_bit(SDATA_STATE_OFFCHANNEL_BEACON_STOPPED, &sdata->state); | |
29cbe68c | 788 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON_ENABLED); |
2b5e1967 | 789 | bcn = rcu_dereference_protected(ifmsh->beacon, |
8d61ffa5 | 790 | lockdep_is_held(&sdata->wdev.mtx)); |
2b5e1967 TP |
791 | rcu_assign_pointer(ifmsh->beacon, NULL); |
792 | kfree_rcu(bcn, rcu_head); | |
0d466b9c TP |
793 | |
794 | /* flush STAs and mpaths on this iface */ | |
b998e8bb | 795 | sta_info_flush(sdata); |
0d466b9c | 796 | mesh_path_flush_by_iface(sdata); |
09b17470 | 797 | |
3f52b7e3 MP |
798 | /* free all potentially still buffered group-addressed frames */ |
799 | local->total_ps_buffered -= skb_queue_len(&ifmsh->ps.bc_buf); | |
800 | skb_queue_purge(&ifmsh->ps.bc_buf); | |
801 | ||
472dbc45 | 802 | del_timer_sync(&sdata->u.mesh.housekeeping_timer); |
e304bfd3 | 803 | del_timer_sync(&sdata->u.mesh.mesh_path_root_timer); |
dd4c9260 | 804 | del_timer_sync(&sdata->u.mesh.mesh_path_timer); |
09b17470 | 805 | |
f81a9ded TP |
806 | /* clear any mesh work (for next join) we may have accrued */ |
807 | ifmsh->wrkq_flags = 0; | |
808 | ifmsh->mbss_changed = 0; | |
809 | ||
09b17470 JB |
810 | local->fif_other_bss--; |
811 | atomic_dec(&local->iff_allmultis); | |
812 | ieee80211_configure_filter(local); | |
472dbc45 JB |
813 | } |
814 | ||
9fb04b50 TP |
815 | static void |
816 | ieee80211_mesh_rx_probe_req(struct ieee80211_sub_if_data *sdata, | |
817 | struct ieee80211_mgmt *mgmt, size_t len) | |
818 | { | |
819 | struct ieee80211_local *local = sdata->local; | |
820 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
821 | struct sk_buff *presp; | |
822 | struct beacon_data *bcn; | |
823 | struct ieee80211_mgmt *hdr; | |
824 | struct ieee802_11_elems elems; | |
825 | size_t baselen; | |
511044ea | 826 | u8 *pos; |
9fb04b50 | 827 | |
9fb04b50 TP |
828 | pos = mgmt->u.probe_req.variable; |
829 | baselen = (u8 *) pos - (u8 *) mgmt; | |
830 | if (baselen > len) | |
831 | return; | |
832 | ||
b2e506bf | 833 | ieee802_11_parse_elems(pos, len - baselen, false, &elems); |
9fb04b50 | 834 | |
a4ef66a9 CYY |
835 | if (!elems.mesh_id) |
836 | return; | |
837 | ||
9fb04b50 TP |
838 | /* 802.11-2012 10.1.4.3.2 */ |
839 | if ((!ether_addr_equal(mgmt->da, sdata->vif.addr) && | |
840 | !is_broadcast_ether_addr(mgmt->da)) || | |
841 | elems.ssid_len != 0) | |
842 | return; | |
843 | ||
844 | if (elems.mesh_id_len != 0 && | |
845 | (elems.mesh_id_len != ifmsh->mesh_id_len || | |
846 | memcmp(elems.mesh_id, ifmsh->mesh_id, ifmsh->mesh_id_len))) | |
847 | return; | |
848 | ||
849 | rcu_read_lock(); | |
850 | bcn = rcu_dereference(ifmsh->beacon); | |
851 | ||
852 | if (!bcn) | |
853 | goto out; | |
854 | ||
855 | presp = dev_alloc_skb(local->tx_headroom + | |
856 | bcn->head_len + bcn->tail_len); | |
857 | if (!presp) | |
858 | goto out; | |
859 | ||
860 | skb_reserve(presp, local->tx_headroom); | |
861 | memcpy(skb_put(presp, bcn->head_len), bcn->head, bcn->head_len); | |
862 | memcpy(skb_put(presp, bcn->tail_len), bcn->tail, bcn->tail_len); | |
863 | hdr = (struct ieee80211_mgmt *) presp->data; | |
864 | hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
865 | IEEE80211_STYPE_PROBE_RESP); | |
866 | memcpy(hdr->da, mgmt->sa, ETH_ALEN); | |
9fb04b50 TP |
867 | IEEE80211_SKB_CB(presp)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
868 | ieee80211_tx_skb(sdata, presp); | |
869 | out: | |
870 | rcu_read_unlock(); | |
871 | } | |
872 | ||
472dbc45 JB |
873 | static void ieee80211_mesh_rx_bcn_presp(struct ieee80211_sub_if_data *sdata, |
874 | u16 stype, | |
875 | struct ieee80211_mgmt *mgmt, | |
876 | size_t len, | |
877 | struct ieee80211_rx_status *rx_status) | |
878 | { | |
c6a1fa12 | 879 | struct ieee80211_local *local = sdata->local; |
dbf498fb | 880 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
472dbc45 JB |
881 | struct ieee802_11_elems elems; |
882 | struct ieee80211_channel *channel; | |
472dbc45 JB |
883 | size_t baselen; |
884 | int freq; | |
885 | enum ieee80211_band band = rx_status->band; | |
886 | ||
887 | /* ignore ProbeResp to foreign address */ | |
888 | if (stype == IEEE80211_STYPE_PROBE_RESP && | |
b203ca39 | 889 | !ether_addr_equal(mgmt->da, sdata->vif.addr)) |
472dbc45 JB |
890 | return; |
891 | ||
892 | baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; | |
893 | if (baselen > len) | |
894 | return; | |
895 | ||
896 | ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, | |
b2e506bf | 897 | false, &elems); |
472dbc45 | 898 | |
9a90bc81 TP |
899 | /* ignore non-mesh or secure / unsecure mismatch */ |
900 | if ((!elems.mesh_id || !elems.mesh_config) || | |
901 | (elems.rsn && sdata->u.mesh.security == IEEE80211_MESH_SEC_NONE) || | |
902 | (!elems.rsn && sdata->u.mesh.security != IEEE80211_MESH_SEC_NONE)) | |
5cff5e01 JC |
903 | return; |
904 | ||
1cd8e88e | 905 | if (elems.ds_params) |
59eb21a6 | 906 | freq = ieee80211_channel_to_frequency(elems.ds_params[0], band); |
472dbc45 JB |
907 | else |
908 | freq = rx_status->freq; | |
909 | ||
910 | channel = ieee80211_get_channel(local->hw.wiphy, freq); | |
911 | ||
912 | if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) | |
913 | return; | |
914 | ||
9a90bc81 | 915 | if (mesh_matches_local(sdata, &elems)) |
f743ff49 | 916 | mesh_neighbour_update(sdata, mgmt->sa, &elems); |
dbf498fb JC |
917 | |
918 | if (ifmsh->sync_ops) | |
919 | ifmsh->sync_ops->rx_bcn_presp(sdata, | |
920 | stype, mgmt, &elems, rx_status); | |
472dbc45 JB |
921 | } |
922 | ||
923 | static void ieee80211_mesh_rx_mgmt_action(struct ieee80211_sub_if_data *sdata, | |
924 | struct ieee80211_mgmt *mgmt, | |
925 | size_t len, | |
926 | struct ieee80211_rx_status *rx_status) | |
927 | { | |
928 | switch (mgmt->u.action.category) { | |
8db09850 TP |
929 | case WLAN_CATEGORY_SELF_PROTECTED: |
930 | switch (mgmt->u.action.u.self_prot.action_code) { | |
931 | case WLAN_SP_MESH_PEERING_OPEN: | |
932 | case WLAN_SP_MESH_PEERING_CLOSE: | |
933 | case WLAN_SP_MESH_PEERING_CONFIRM: | |
934 | mesh_rx_plink_frame(sdata, mgmt, len, rx_status); | |
935 | break; | |
936 | } | |
472dbc45 | 937 | break; |
25d49e4d TP |
938 | case WLAN_CATEGORY_MESH_ACTION: |
939 | if (mesh_action_is_path_sel(mgmt)) | |
940 | mesh_rx_path_sel_frame(sdata, mgmt, len); | |
472dbc45 JB |
941 | break; |
942 | } | |
943 | } | |
944 | ||
1fa57d01 JB |
945 | void ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, |
946 | struct sk_buff *skb) | |
472dbc45 JB |
947 | { |
948 | struct ieee80211_rx_status *rx_status; | |
472dbc45 JB |
949 | struct ieee80211_mgmt *mgmt; |
950 | u16 stype; | |
951 | ||
ecccd072 TP |
952 | sdata_lock(sdata); |
953 | ||
954 | /* mesh already went down */ | |
955 | if (!sdata->wdev.mesh_id_len) | |
956 | goto out; | |
957 | ||
f1d58c25 | 958 | rx_status = IEEE80211_SKB_RXCB(skb); |
472dbc45 JB |
959 | mgmt = (struct ieee80211_mgmt *) skb->data; |
960 | stype = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE; | |
961 | ||
962 | switch (stype) { | |
963 | case IEEE80211_STYPE_PROBE_RESP: | |
964 | case IEEE80211_STYPE_BEACON: | |
965 | ieee80211_mesh_rx_bcn_presp(sdata, stype, mgmt, skb->len, | |
966 | rx_status); | |
967 | break; | |
9fb04b50 TP |
968 | case IEEE80211_STYPE_PROBE_REQ: |
969 | ieee80211_mesh_rx_probe_req(sdata, mgmt, skb->len); | |
970 | break; | |
472dbc45 JB |
971 | case IEEE80211_STYPE_ACTION: |
972 | ieee80211_mesh_rx_mgmt_action(sdata, mgmt, skb->len, rx_status); | |
973 | break; | |
974 | } | |
ecccd072 TP |
975 | out: |
976 | sdata_unlock(sdata); | |
472dbc45 JB |
977 | } |
978 | ||
f81a9ded TP |
979 | static void mesh_bss_info_changed(struct ieee80211_sub_if_data *sdata) |
980 | { | |
981 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
982 | u32 bit, changed = 0; | |
983 | ||
984 | for_each_set_bit(bit, &ifmsh->mbss_changed, | |
985 | sizeof(changed) * BITS_PER_BYTE) { | |
986 | clear_bit(bit, &ifmsh->mbss_changed); | |
987 | changed |= BIT(bit); | |
988 | } | |
989 | ||
990 | if (sdata->vif.bss_conf.enable_beacon && | |
991 | (changed & (BSS_CHANGED_BEACON | | |
992 | BSS_CHANGED_HT | | |
993 | BSS_CHANGED_BASIC_RATES | | |
994 | BSS_CHANGED_BEACON_INT))) | |
995 | if (ieee80211_mesh_rebuild_beacon(sdata)) | |
996 | return; | |
997 | ||
998 | ieee80211_bss_info_change_notify(sdata, changed); | |
999 | } | |
1000 | ||
1fa57d01 | 1001 | void ieee80211_mesh_work(struct ieee80211_sub_if_data *sdata) |
472dbc45 | 1002 | { |
472dbc45 | 1003 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
472dbc45 | 1004 | |
ecccd072 TP |
1005 | sdata_lock(sdata); |
1006 | ||
1007 | /* mesh already went down */ | |
1008 | if (!sdata->wdev.mesh_id_len) | |
1009 | goto out; | |
1010 | ||
472dbc45 JB |
1011 | if (ifmsh->preq_queue_len && |
1012 | time_after(jiffies, | |
1013 | ifmsh->last_preq + msecs_to_jiffies(ifmsh->mshcfg.dot11MeshHWMPpreqMinInterval))) | |
1014 | mesh_path_start_discovery(sdata); | |
1015 | ||
18889231 JC |
1016 | if (test_and_clear_bit(MESH_WORK_GROW_MPATH_TABLE, &ifmsh->wrkq_flags)) |
1017 | mesh_mpath_table_grow(); | |
1018 | ||
dcac908b | 1019 | if (test_and_clear_bit(MESH_WORK_GROW_MPP_TABLE, &ifmsh->wrkq_flags)) |
18889231 JC |
1020 | mesh_mpp_table_grow(); |
1021 | ||
1022 | if (test_and_clear_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags)) | |
bf7cd94d | 1023 | ieee80211_mesh_housekeeping(sdata); |
e304bfd3 RP |
1024 | |
1025 | if (test_and_clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags)) | |
1026 | ieee80211_mesh_rootpath(sdata); | |
dbf498fb JC |
1027 | |
1028 | if (test_and_clear_bit(MESH_WORK_DRIFT_ADJUST, &ifmsh->wrkq_flags)) | |
1029 | mesh_sync_adjust_tbtt(sdata); | |
ecccd072 | 1030 | |
f81a9ded TP |
1031 | if (test_and_clear_bit(MESH_WORK_MBSS_CHANGED, &ifmsh->wrkq_flags)) |
1032 | mesh_bss_info_changed(sdata); | |
ecccd072 TP |
1033 | out: |
1034 | sdata_unlock(sdata); | |
472dbc45 JB |
1035 | } |
1036 | ||
1037 | void ieee80211_mesh_notify_scan_completed(struct ieee80211_local *local) | |
1038 | { | |
1039 | struct ieee80211_sub_if_data *sdata; | |
1040 | ||
1041 | rcu_read_lock(); | |
1042 | list_for_each_entry_rcu(sdata, &local->interfaces, list) | |
370bd005 BG |
1043 | if (ieee80211_vif_is_mesh(&sdata->vif) && |
1044 | ieee80211_sdata_running(sdata)) | |
64592c8f | 1045 | ieee80211_queue_work(&local->hw, &sdata->work); |
472dbc45 JB |
1046 | rcu_read_unlock(); |
1047 | } | |
1048 | ||
902acc78 JB |
1049 | void ieee80211_mesh_init_sdata(struct ieee80211_sub_if_data *sdata) |
1050 | { | |
472dbc45 | 1051 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
ad2d223a | 1052 | static u8 zero_addr[ETH_ALEN] = {}; |
472dbc45 | 1053 | |
472dbc45 JB |
1054 | setup_timer(&ifmsh->housekeeping_timer, |
1055 | ieee80211_mesh_housekeeping_timer, | |
1056 | (unsigned long) sdata); | |
472dbc45 | 1057 | |
472dbc45 JB |
1058 | ifmsh->accepting_plinks = true; |
1059 | ifmsh->preq_id = 0; | |
d19b3bf6 | 1060 | ifmsh->sn = 0; |
5ee68e5b | 1061 | ifmsh->num_gates = 0; |
472dbc45 | 1062 | atomic_set(&ifmsh->mpaths, 0); |
f698d856 | 1063 | mesh_rmc_init(sdata); |
472dbc45 | 1064 | ifmsh->last_preq = jiffies; |
dca7e943 | 1065 | ifmsh->next_perr = jiffies; |
902acc78 JB |
1066 | /* Allocate all mesh structures when creating the first mesh interface. */ |
1067 | if (!mesh_allocated) | |
1068 | ieee80211s_init(); | |
472dbc45 | 1069 | setup_timer(&ifmsh->mesh_path_timer, |
902acc78 JB |
1070 | ieee80211_mesh_path_timer, |
1071 | (unsigned long) sdata); | |
e304bfd3 RP |
1072 | setup_timer(&ifmsh->mesh_path_root_timer, |
1073 | ieee80211_mesh_path_root_timer, | |
1074 | (unsigned long) sdata); | |
472dbc45 | 1075 | INIT_LIST_HEAD(&ifmsh->preq_queue.list); |
3f52b7e3 | 1076 | skb_queue_head_init(&ifmsh->ps.bc_buf); |
472dbc45 | 1077 | spin_lock_init(&ifmsh->mesh_preq_queue_lock); |
dbf498fb | 1078 | spin_lock_init(&ifmsh->sync_offset_lock); |
2b5e1967 | 1079 | RCU_INIT_POINTER(ifmsh->beacon, NULL); |
ad2d223a JB |
1080 | |
1081 | sdata->vif.bss_conf.bssid = zero_addr; | |
472dbc45 | 1082 | } |