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; |
739522ba | 65 | struct ieee80211_local *local = sdata->local; |
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 | |
55de908a | 88 | ieee80211_sta_get_rates(local, 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 | ||
97 | if (!cfg80211_chandef_compatible(&sdata->vif.bss_conf.chandef, | |
98 | &sta_chan_def)) | |
bf7cd94d | 99 | return false; |
2e3c8736 | 100 | |
739522ba | 101 | return true; |
2e3c8736 LCC |
102 | } |
103 | ||
104 | /** | |
105 | * mesh_peer_accepts_plinks - check if an mp is willing to establish peer links | |
106 | * | |
107 | * @ie: information elements of a management frame from the mesh peer | |
2e3c8736 | 108 | */ |
f698d856 | 109 | bool mesh_peer_accepts_plinks(struct ieee802_11_elems *ie) |
2e3c8736 | 110 | { |
136cfa28 | 111 | return (ie->mesh_config->meshconf_cap & |
bf7cd94d | 112 | IEEE80211_MESHCONF_CAPAB_ACCEPT_PLINKS) != 0; |
2e3c8736 LCC |
113 | } |
114 | ||
115 | /** | |
2c53040f | 116 | * mesh_accept_plinks_update - update accepting_plink in local mesh beacons |
2e3c8736 | 117 | * |
d0709a65 | 118 | * @sdata: mesh interface in which mesh beacons are going to be updated |
df323818 MP |
119 | * |
120 | * Returns: beacon changed flag if the beacon content changed. | |
2e3c8736 | 121 | */ |
df323818 | 122 | u32 mesh_accept_plinks_update(struct ieee80211_sub_if_data *sdata) |
2e3c8736 | 123 | { |
2e3c8736 | 124 | bool free_plinks; |
df323818 | 125 | u32 changed = 0; |
2e3c8736 LCC |
126 | |
127 | /* In case mesh_plink_free_count > 0 and mesh_plinktbl_capacity == 0, | |
128 | * the mesh interface might be able to establish plinks with peers that | |
b4e08ea1 LCC |
129 | * are already on the table but are not on PLINK_ESTAB state. However, |
130 | * in general the mesh interface is not accepting peer link requests | |
131 | * from new peers, and that must be reflected in the beacon | |
2e3c8736 LCC |
132 | */ |
133 | free_plinks = mesh_plink_availables(sdata); | |
134 | ||
df323818 MP |
135 | if (free_plinks != sdata->u.mesh.accepting_plinks) { |
136 | sdata->u.mesh.accepting_plinks = free_plinks; | |
137 | changed = BSS_CHANGED_BEACON; | |
138 | } | |
139 | ||
140 | return changed; | |
2e3c8736 LCC |
141 | } |
142 | ||
45b5028e TP |
143 | /* |
144 | * mesh_sta_cleanup - clean up any mesh sta state | |
145 | * | |
146 | * @sta: mesh sta to clean up. | |
147 | */ | |
148 | void mesh_sta_cleanup(struct sta_info *sta) | |
149 | { | |
150 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
151 | u32 changed; | |
152 | ||
153 | /* | |
154 | * maybe userspace handles peer allocation and peering, but in either | |
155 | * case the beacon is still generated by the kernel and we might need | |
156 | * an update. | |
157 | */ | |
158 | changed = mesh_accept_plinks_update(sdata); | |
a6dad6a2 | 159 | if (!sdata->u.mesh.user_mpm) { |
45b5028e TP |
160 | changed |= mesh_plink_deactivate(sta); |
161 | del_timer_sync(&sta->plink_timer); | |
162 | } | |
163 | ||
f81a9ded | 164 | if (changed) |
2b5e1967 | 165 | ieee80211_mbss_info_change_notify(sdata, changed); |
45b5028e TP |
166 | } |
167 | ||
f698d856 | 168 | int mesh_rmc_init(struct ieee80211_sub_if_data *sdata) |
2e3c8736 | 169 | { |
2e3c8736 LCC |
170 | int i; |
171 | ||
472dbc45 JB |
172 | sdata->u.mesh.rmc = kmalloc(sizeof(struct mesh_rmc), GFP_KERNEL); |
173 | if (!sdata->u.mesh.rmc) | |
2e3c8736 | 174 | return -ENOMEM; |
472dbc45 | 175 | sdata->u.mesh.rmc->idx_mask = RMC_BUCKETS - 1; |
2e3c8736 | 176 | for (i = 0; i < RMC_BUCKETS; i++) |
b7cfcd11 | 177 | INIT_LIST_HEAD(&sdata->u.mesh.rmc->bucket[i]); |
2e3c8736 LCC |
178 | return 0; |
179 | } | |
180 | ||
f698d856 | 181 | void mesh_rmc_free(struct ieee80211_sub_if_data *sdata) |
2e3c8736 | 182 | { |
472dbc45 | 183 | struct mesh_rmc *rmc = sdata->u.mesh.rmc; |
2e3c8736 LCC |
184 | struct rmc_entry *p, *n; |
185 | int i; | |
186 | ||
472dbc45 | 187 | if (!sdata->u.mesh.rmc) |
2e3c8736 LCC |
188 | return; |
189 | ||
bf7cd94d | 190 | for (i = 0; i < RMC_BUCKETS; i++) { |
b7cfcd11 | 191 | list_for_each_entry_safe(p, n, &rmc->bucket[i], list) { |
2e3c8736 LCC |
192 | list_del(&p->list); |
193 | kmem_cache_free(rm_cache, p); | |
194 | } | |
bf7cd94d | 195 | } |
2e3c8736 LCC |
196 | |
197 | kfree(rmc); | |
472dbc45 | 198 | sdata->u.mesh.rmc = NULL; |
2e3c8736 LCC |
199 | } |
200 | ||
201 | /** | |
202 | * mesh_rmc_check - Check frame in recent multicast cache and add if absent. | |
203 | * | |
bf7cd94d | 204 | * @sdata: interface |
2e3c8736 LCC |
205 | * @sa: source address |
206 | * @mesh_hdr: mesh_header | |
207 | * | |
208 | * Returns: 0 if the frame is not in the cache, nonzero otherwise. | |
209 | * | |
210 | * Checks using the source address and the mesh sequence number if we have | |
211 | * received this frame lately. If the frame is not in the cache, it is added to | |
212 | * it. | |
213 | */ | |
bf7cd94d JB |
214 | int mesh_rmc_check(struct ieee80211_sub_if_data *sdata, |
215 | const u8 *sa, struct ieee80211s_hdr *mesh_hdr) | |
2e3c8736 | 216 | { |
472dbc45 | 217 | struct mesh_rmc *rmc = sdata->u.mesh.rmc; |
2e3c8736 LCC |
218 | u32 seqnum = 0; |
219 | int entries = 0; | |
220 | u8 idx; | |
221 | struct rmc_entry *p, *n; | |
222 | ||
223 | /* Don't care about endianness since only match matters */ | |
51ceddad LCC |
224 | memcpy(&seqnum, &mesh_hdr->seqnum, sizeof(mesh_hdr->seqnum)); |
225 | idx = le32_to_cpu(mesh_hdr->seqnum) & rmc->idx_mask; | |
b7cfcd11 | 226 | list_for_each_entry_safe(p, n, &rmc->bucket[idx], list) { |
2e3c8736 LCC |
227 | ++entries; |
228 | if (time_after(jiffies, p->exp_time) || | |
bf7cd94d | 229 | entries == RMC_QUEUE_MAX_LEN) { |
2e3c8736 LCC |
230 | list_del(&p->list); |
231 | kmem_cache_free(rm_cache, p); | |
232 | --entries; | |
bf7cd94d | 233 | } else if ((seqnum == p->seqnum) && ether_addr_equal(sa, p->sa)) |
2e3c8736 LCC |
234 | return -1; |
235 | } | |
236 | ||
237 | p = kmem_cache_alloc(rm_cache, GFP_ATOMIC); | |
d15b8459 | 238 | if (!p) |
2e3c8736 | 239 | return 0; |
d15b8459 | 240 | |
2e3c8736 LCC |
241 | p->seqnum = seqnum; |
242 | p->exp_time = jiffies + RMC_TIMEOUT; | |
243 | memcpy(p->sa, sa, ETH_ALEN); | |
b7cfcd11 | 244 | list_add(&p->list, &rmc->bucket[idx]); |
2e3c8736 LCC |
245 | return 0; |
246 | } | |
247 | ||
bf7cd94d JB |
248 | int mesh_add_meshconf_ie(struct ieee80211_sub_if_data *sdata, |
249 | struct sk_buff *skb) | |
082ebb0c TP |
250 | { |
251 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
252 | u8 *pos, neighbors; | |
253 | u8 meshconf_len = sizeof(struct ieee80211_meshconf_ie); | |
254 | ||
255 | if (skb_tailroom(skb) < 2 + meshconf_len) | |
256 | return -ENOMEM; | |
257 | ||
258 | pos = skb_put(skb, 2 + meshconf_len); | |
259 | *pos++ = WLAN_EID_MESH_CONFIG; | |
260 | *pos++ = meshconf_len; | |
261 | ||
262 | /* Active path selection protocol ID */ | |
263 | *pos++ = ifmsh->mesh_pp_id; | |
264 | /* Active path selection metric ID */ | |
265 | *pos++ = ifmsh->mesh_pm_id; | |
266 | /* Congestion control mode identifier */ | |
267 | *pos++ = ifmsh->mesh_cc_id; | |
268 | /* Synchronization protocol identifier */ | |
269 | *pos++ = ifmsh->mesh_sp_id; | |
270 | /* Authentication Protocol identifier */ | |
271 | *pos++ = ifmsh->mesh_auth_id; | |
272 | /* Mesh Formation Info - number of neighbors */ | |
1258d976 | 273 | neighbors = atomic_read(&ifmsh->estab_plinks); |
e05ecccd | 274 | neighbors = min_t(int, neighbors, IEEE80211_MAX_MESH_PEERINGS); |
082ebb0c TP |
275 | *pos++ = neighbors << 1; |
276 | /* Mesh capability */ | |
65821635 | 277 | *pos = IEEE80211_MESHCONF_CAPAB_FORWARDING; |
dbf498fb | 278 | *pos |= ifmsh->accepting_plinks ? |
bf7cd94d | 279 | IEEE80211_MESHCONF_CAPAB_ACCEPT_PLINKS : 0x00; |
3f52b7e3 MP |
280 | /* Mesh PS mode. See IEEE802.11-2012 8.4.2.100.8 */ |
281 | *pos |= ifmsh->ps_peers_deep_sleep ? | |
bf7cd94d | 282 | IEEE80211_MESHCONF_CAPAB_POWER_SAVE_LEVEL : 0x00; |
dbf498fb | 283 | *pos++ |= ifmsh->adjusting_tbtt ? |
bf7cd94d | 284 | IEEE80211_MESHCONF_CAPAB_TBTT_ADJUSTING : 0x00; |
082ebb0c TP |
285 | *pos++ = 0x00; |
286 | ||
287 | return 0; | |
288 | } | |
289 | ||
bf7cd94d | 290 | int mesh_add_meshid_ie(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb) |
082ebb0c TP |
291 | { |
292 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
293 | u8 *pos; | |
294 | ||
295 | if (skb_tailroom(skb) < 2 + ifmsh->mesh_id_len) | |
296 | return -ENOMEM; | |
297 | ||
298 | pos = skb_put(skb, 2 + ifmsh->mesh_id_len); | |
299 | *pos++ = WLAN_EID_MESH_ID; | |
300 | *pos++ = ifmsh->mesh_id_len; | |
301 | if (ifmsh->mesh_id_len) | |
302 | memcpy(pos, ifmsh->mesh_id, ifmsh->mesh_id_len); | |
303 | ||
304 | return 0; | |
305 | } | |
306 | ||
bf7cd94d JB |
307 | static int mesh_add_awake_window_ie(struct ieee80211_sub_if_data *sdata, |
308 | struct sk_buff *skb) | |
3f52b7e3 MP |
309 | { |
310 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
311 | u8 *pos; | |
312 | ||
313 | /* see IEEE802.11-2012 13.14.6 */ | |
314 | if (ifmsh->ps_peers_light_sleep == 0 && | |
315 | ifmsh->ps_peers_deep_sleep == 0 && | |
316 | ifmsh->nonpeer_pm == NL80211_MESH_POWER_ACTIVE) | |
317 | return 0; | |
318 | ||
319 | if (skb_tailroom(skb) < 4) | |
320 | return -ENOMEM; | |
321 | ||
322 | pos = skb_put(skb, 2 + 2); | |
323 | *pos++ = WLAN_EID_MESH_AWAKE_WINDOW; | |
324 | *pos++ = 2; | |
325 | put_unaligned_le16(ifmsh->mshcfg.dot11MeshAwakeWindowDuration, pos); | |
326 | ||
327 | return 0; | |
328 | } | |
329 | ||
bf7cd94d JB |
330 | int mesh_add_vendor_ies(struct ieee80211_sub_if_data *sdata, |
331 | struct sk_buff *skb) | |
082ebb0c TP |
332 | { |
333 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
334 | u8 offset, len; | |
335 | const u8 *data; | |
336 | ||
337 | if (!ifmsh->ie || !ifmsh->ie_len) | |
338 | return 0; | |
339 | ||
340 | /* fast-forward to vendor IEs */ | |
341 | offset = ieee80211_ie_split_vendor(ifmsh->ie, ifmsh->ie_len, 0); | |
342 | ||
343 | if (offset) { | |
344 | len = ifmsh->ie_len - offset; | |
345 | data = ifmsh->ie + offset; | |
346 | if (skb_tailroom(skb) < len) | |
347 | return -ENOMEM; | |
348 | memcpy(skb_put(skb, len), data, len); | |
349 | } | |
350 | ||
351 | return 0; | |
352 | } | |
353 | ||
bf7cd94d | 354 | int mesh_add_rsn_ie(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb) |
082ebb0c TP |
355 | { |
356 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
357 | u8 len = 0; | |
358 | const u8 *data; | |
359 | ||
360 | if (!ifmsh->ie || !ifmsh->ie_len) | |
361 | return 0; | |
362 | ||
363 | /* find RSN IE */ | |
364 | data = ifmsh->ie; | |
365 | while (data < ifmsh->ie + ifmsh->ie_len) { | |
366 | if (*data == WLAN_EID_RSN) { | |
367 | len = data[1] + 2; | |
368 | break; | |
369 | } | |
370 | data++; | |
371 | } | |
372 | ||
373 | if (len) { | |
374 | if (skb_tailroom(skb) < len) | |
375 | return -ENOMEM; | |
376 | memcpy(skb_put(skb, len), data, len); | |
377 | } | |
378 | ||
379 | return 0; | |
380 | } | |
381 | ||
bf7cd94d JB |
382 | static int mesh_add_ds_params_ie(struct ieee80211_sub_if_data *sdata, |
383 | struct sk_buff *skb) | |
082ebb0c | 384 | { |
55de908a JB |
385 | struct ieee80211_chanctx_conf *chanctx_conf; |
386 | struct ieee80211_channel *chan; | |
082ebb0c | 387 | u8 *pos; |
2e3c8736 | 388 | |
082ebb0c TP |
389 | if (skb_tailroom(skb) < 3) |
390 | return -ENOMEM; | |
391 | ||
55de908a JB |
392 | rcu_read_lock(); |
393 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
394 | if (WARN_ON(!chanctx_conf)) { | |
395 | rcu_read_unlock(); | |
396 | return -EINVAL; | |
397 | } | |
4bf88530 | 398 | chan = chanctx_conf->def.chan; |
55de908a JB |
399 | rcu_read_unlock(); |
400 | ||
601513aa ET |
401 | pos = skb_put(skb, 2 + 1); |
402 | *pos++ = WLAN_EID_DS_PARAMS; | |
403 | *pos++ = 1; | |
404 | *pos++ = ieee80211_frequency_to_channel(chan->center_freq); | |
be125c60 | 405 | |
082ebb0c | 406 | return 0; |
2e3c8736 LCC |
407 | } |
408 | ||
bf7cd94d JB |
409 | int mesh_add_ht_cap_ie(struct ieee80211_sub_if_data *sdata, |
410 | struct sk_buff *skb) | |
176f3608 TP |
411 | { |
412 | struct ieee80211_local *local = sdata->local; | |
55de908a | 413 | enum ieee80211_band band = ieee80211_get_sdata_band(sdata); |
176f3608 TP |
414 | struct ieee80211_supported_band *sband; |
415 | u8 *pos; | |
416 | ||
55de908a | 417 | sband = local->hw.wiphy->bands[band]; |
176f3608 | 418 | if (!sband->ht_cap.ht_supported || |
4bf88530 | 419 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT) |
176f3608 TP |
420 | return 0; |
421 | ||
422 | if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_ht_cap)) | |
423 | return -ENOMEM; | |
424 | ||
425 | pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_cap)); | |
ef96a842 | 426 | ieee80211_ie_build_ht_cap(pos, &sband->ht_cap, sband->ht_cap.cap); |
176f3608 TP |
427 | |
428 | return 0; | |
429 | } | |
430 | ||
bf7cd94d JB |
431 | int mesh_add_ht_oper_ie(struct ieee80211_sub_if_data *sdata, |
432 | struct sk_buff *skb) | |
176f3608 TP |
433 | { |
434 | struct ieee80211_local *local = sdata->local; | |
55de908a JB |
435 | struct ieee80211_chanctx_conf *chanctx_conf; |
436 | struct ieee80211_channel *channel; | |
466f310d | 437 | enum nl80211_channel_type channel_type = |
4bf88530 | 438 | cfg80211_get_chandef_type(&sdata->vif.bss_conf.chandef); |
55de908a JB |
439 | struct ieee80211_supported_band *sband; |
440 | struct ieee80211_sta_ht_cap *ht_cap; | |
176f3608 TP |
441 | u8 *pos; |
442 | ||
55de908a JB |
443 | rcu_read_lock(); |
444 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
445 | if (WARN_ON(!chanctx_conf)) { | |
446 | rcu_read_unlock(); | |
447 | return -EINVAL; | |
448 | } | |
4bf88530 | 449 | channel = chanctx_conf->def.chan; |
55de908a JB |
450 | rcu_read_unlock(); |
451 | ||
452 | sband = local->hw.wiphy->bands[channel->band]; | |
453 | ht_cap = &sband->ht_cap; | |
454 | ||
176f3608 TP |
455 | if (!ht_cap->ht_supported || channel_type == NL80211_CHAN_NO_HT) |
456 | return 0; | |
457 | ||
074d46d1 | 458 | if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_ht_operation)) |
176f3608 TP |
459 | return -ENOMEM; |
460 | ||
074d46d1 | 461 | pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_operation)); |
4bf88530 | 462 | ieee80211_ie_build_ht_oper(pos, ht_cap, &sdata->vif.bss_conf.chandef, |
431e3154 | 463 | sdata->vif.bss_conf.ht_operation_mode); |
176f3608 TP |
464 | |
465 | return 0; | |
466 | } | |
bf7cd94d | 467 | |
2e3c8736 LCC |
468 | static void ieee80211_mesh_path_timer(unsigned long data) |
469 | { | |
470 | struct ieee80211_sub_if_data *sdata = | |
471 | (struct ieee80211_sub_if_data *) data; | |
5bb644a0 | 472 | |
690205f1 | 473 | ieee80211_queue_work(&sdata->local->hw, &sdata->work); |
2e3c8736 LCC |
474 | } |
475 | ||
e304bfd3 RP |
476 | static void ieee80211_mesh_path_root_timer(unsigned long data) |
477 | { | |
478 | struct ieee80211_sub_if_data *sdata = | |
479 | (struct ieee80211_sub_if_data *) data; | |
480 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
e304bfd3 RP |
481 | |
482 | set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); | |
483 | ||
690205f1 | 484 | ieee80211_queue_work(&sdata->local->hw, &sdata->work); |
e304bfd3 RP |
485 | } |
486 | ||
63c5723b RP |
487 | void ieee80211_mesh_root_setup(struct ieee80211_if_mesh *ifmsh) |
488 | { | |
dbb912cd | 489 | if (ifmsh->mshcfg.dot11MeshHWMPRootMode > IEEE80211_ROOTMODE_ROOT) |
63c5723b RP |
490 | set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); |
491 | else { | |
492 | clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); | |
493 | /* stop running timer */ | |
494 | del_timer_sync(&ifmsh->mesh_path_root_timer); | |
495 | } | |
496 | } | |
497 | ||
3c5772a5 JC |
498 | /** |
499 | * ieee80211_fill_mesh_addresses - fill addresses of a locally originated mesh frame | |
bf7cd94d | 500 | * @hdr: 802.11 frame header |
3c5772a5 JC |
501 | * @fc: frame control field |
502 | * @meshda: destination address in the mesh | |
503 | * @meshsa: source address address in the mesh. Same as TA, as frame is | |
504 | * locally originated. | |
505 | * | |
506 | * Return the length of the 802.11 (does not include a mesh control header) | |
507 | */ | |
15ff6365 JB |
508 | int ieee80211_fill_mesh_addresses(struct ieee80211_hdr *hdr, __le16 *fc, |
509 | const u8 *meshda, const u8 *meshsa) | |
510 | { | |
3c5772a5 JC |
511 | if (is_multicast_ether_addr(meshda)) { |
512 | *fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS); | |
513 | /* DA TA SA */ | |
514 | memcpy(hdr->addr1, meshda, ETH_ALEN); | |
515 | memcpy(hdr->addr2, meshsa, ETH_ALEN); | |
516 | memcpy(hdr->addr3, meshsa, ETH_ALEN); | |
517 | return 24; | |
518 | } else { | |
2154c81c | 519 | *fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); |
3c5772a5 JC |
520 | /* RA TA DA SA */ |
521 | memset(hdr->addr1, 0, ETH_ALEN); /* RA is resolved later */ | |
522 | memcpy(hdr->addr2, meshsa, ETH_ALEN); | |
523 | memcpy(hdr->addr3, meshda, ETH_ALEN); | |
524 | memcpy(hdr->addr4, meshsa, ETH_ALEN); | |
525 | return 30; | |
526 | } | |
527 | } | |
528 | ||
902acc78 JB |
529 | /** |
530 | * ieee80211_new_mesh_header - create a new mesh header | |
902acc78 | 531 | * @sdata: mesh interface to be used |
bf7cd94d | 532 | * @meshhdr: uninitialized mesh header |
61ad5394 JC |
533 | * @addr4or5: 1st address in the ae header, which may correspond to address 4 |
534 | * (if addr6 is NULL) or address 5 (if addr6 is present). It may | |
535 | * be NULL. | |
536 | * @addr6: 2nd address in the ae header, which corresponds to addr6 of the | |
537 | * mesh frame | |
902acc78 JB |
538 | * |
539 | * Return the header length. | |
540 | */ | |
bf7cd94d JB |
541 | int ieee80211_new_mesh_header(struct ieee80211_sub_if_data *sdata, |
542 | struct ieee80211s_hdr *meshhdr, | |
543 | const char *addr4or5, const char *addr6) | |
902acc78 | 544 | { |
bf7cd94d JB |
545 | if (WARN_ON(!addr4or5 && addr6)) |
546 | return 0; | |
547 | ||
0c3cee72 | 548 | memset(meshhdr, 0, sizeof(*meshhdr)); |
bf7cd94d | 549 | |
472dbc45 | 550 | meshhdr->ttl = sdata->u.mesh.mshcfg.dot11MeshTTL; |
bf7cd94d JB |
551 | |
552 | /* FIXME: racy -- TX on multiple queues can be concurrent */ | |
472dbc45 JB |
553 | put_unaligned(cpu_to_le32(sdata->u.mesh.mesh_seqnum), &meshhdr->seqnum); |
554 | sdata->u.mesh.mesh_seqnum++; | |
bf7cd94d | 555 | |
61ad5394 | 556 | if (addr4or5 && !addr6) { |
3c5772a5 | 557 | meshhdr->flags |= MESH_FLAGS_AE_A4; |
61ad5394 | 558 | memcpy(meshhdr->eaddr1, addr4or5, ETH_ALEN); |
bf7cd94d | 559 | return 2 * ETH_ALEN; |
61ad5394 | 560 | } else if (addr4or5 && addr6) { |
3c5772a5 | 561 | meshhdr->flags |= MESH_FLAGS_AE_A5_A6; |
61ad5394 JC |
562 | memcpy(meshhdr->eaddr1, addr4or5, ETH_ALEN); |
563 | memcpy(meshhdr->eaddr2, addr6, ETH_ALEN); | |
bf7cd94d | 564 | return 3 * ETH_ALEN; |
3c5772a5 | 565 | } |
bf7cd94d JB |
566 | |
567 | return ETH_ALEN; | |
902acc78 JB |
568 | } |
569 | ||
bf7cd94d | 570 | static void ieee80211_mesh_housekeeping(struct ieee80211_sub_if_data *sdata) |
472dbc45 | 571 | { |
bf7cd94d | 572 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
df323818 | 573 | u32 changed; |
472dbc45 | 574 | |
66de6713 | 575 | ieee80211_sta_expire(sdata, ifmsh->mshcfg.plink_timeout * HZ); |
472dbc45 JB |
576 | mesh_path_expire(sdata); |
577 | ||
df323818 | 578 | changed = mesh_accept_plinks_update(sdata); |
2b5e1967 | 579 | ieee80211_mbss_info_change_notify(sdata, changed); |
472dbc45 | 580 | |
472dbc45 | 581 | mod_timer(&ifmsh->housekeeping_timer, |
bf7cd94d JB |
582 | round_jiffies(jiffies + |
583 | IEEE80211_MESH_HOUSEKEEPING_INTERVAL)); | |
472dbc45 JB |
584 | } |
585 | ||
e304bfd3 RP |
586 | static void ieee80211_mesh_rootpath(struct ieee80211_sub_if_data *sdata) |
587 | { | |
588 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
a69cc44f | 589 | u32 interval; |
e304bfd3 RP |
590 | |
591 | mesh_path_tx_root_frame(sdata); | |
a69cc44f CYY |
592 | |
593 | if (ifmsh->mshcfg.dot11MeshHWMPRootMode == IEEE80211_PROACTIVE_RANN) | |
594 | interval = ifmsh->mshcfg.dot11MeshHWMPRannInterval; | |
595 | else | |
596 | interval = ifmsh->mshcfg.dot11MeshHWMProotInterval; | |
597 | ||
e304bfd3 | 598 | mod_timer(&ifmsh->mesh_path_root_timer, |
a69cc44f | 599 | round_jiffies(TU_TO_EXP_TIME(interval))); |
e304bfd3 RP |
600 | } |
601 | ||
2b5e1967 TP |
602 | static int |
603 | ieee80211_mesh_build_beacon(struct ieee80211_if_mesh *ifmsh) | |
604 | { | |
605 | struct beacon_data *bcn; | |
606 | int head_len, tail_len; | |
607 | struct sk_buff *skb; | |
608 | struct ieee80211_mgmt *mgmt; | |
609 | struct ieee80211_chanctx_conf *chanctx_conf; | |
610 | enum ieee80211_band band; | |
611 | u8 *pos; | |
612 | struct ieee80211_sub_if_data *sdata; | |
613 | int hdr_len = offsetof(struct ieee80211_mgmt, u.beacon) + | |
614 | sizeof(mgmt->u.beacon); | |
615 | ||
616 | sdata = container_of(ifmsh, struct ieee80211_sub_if_data, u.mesh); | |
617 | rcu_read_lock(); | |
618 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
619 | band = chanctx_conf->def.chan->band; | |
620 | rcu_read_unlock(); | |
621 | ||
622 | head_len = hdr_len + | |
623 | 2 + /* NULL SSID */ | |
624 | 2 + 8 + /* supported rates */ | |
625 | 2 + 3; /* DS params */ | |
626 | tail_len = 2 + (IEEE80211_MAX_SUPP_RATES - 8) + | |
627 | 2 + sizeof(struct ieee80211_ht_cap) + | |
628 | 2 + sizeof(struct ieee80211_ht_operation) + | |
629 | 2 + ifmsh->mesh_id_len + | |
630 | 2 + sizeof(struct ieee80211_meshconf_ie) + | |
631 | 2 + sizeof(__le16) + /* awake window */ | |
632 | ifmsh->ie_len; | |
633 | ||
634 | bcn = kzalloc(sizeof(*bcn) + head_len + tail_len, GFP_KERNEL); | |
635 | /* need an skb for IE builders to operate on */ | |
636 | skb = dev_alloc_skb(max(head_len, tail_len)); | |
637 | ||
638 | if (!bcn || !skb) | |
639 | goto out_free; | |
640 | ||
641 | /* | |
642 | * pointers go into the block we allocated, | |
643 | * memory is | beacon_data | head | tail | | |
644 | */ | |
645 | bcn->head = ((u8 *) bcn) + sizeof(*bcn); | |
646 | ||
647 | /* fill in the head */ | |
648 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, hdr_len); | |
649 | memset(mgmt, 0, hdr_len); | |
650 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
651 | IEEE80211_STYPE_BEACON); | |
652 | eth_broadcast_addr(mgmt->da); | |
653 | memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); | |
654 | memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN); | |
655 | ieee80211_mps_set_frame_flags(sdata, NULL, (void *) mgmt); | |
656 | mgmt->u.beacon.beacon_int = | |
657 | cpu_to_le16(sdata->vif.bss_conf.beacon_int); | |
658 | mgmt->u.beacon.capab_info |= cpu_to_le16( | |
659 | sdata->u.mesh.security ? WLAN_CAPABILITY_PRIVACY : 0); | |
660 | ||
661 | pos = skb_put(skb, 2); | |
662 | *pos++ = WLAN_EID_SSID; | |
663 | *pos++ = 0x0; | |
664 | ||
665 | if (ieee80211_add_srates_ie(sdata, skb, true, band) || | |
bf7cd94d | 666 | mesh_add_ds_params_ie(sdata, skb)) |
2b5e1967 TP |
667 | goto out_free; |
668 | ||
669 | bcn->head_len = skb->len; | |
670 | memcpy(bcn->head, skb->data, bcn->head_len); | |
671 | ||
672 | /* now the tail */ | |
673 | skb_trim(skb, 0); | |
674 | bcn->tail = bcn->head + bcn->head_len; | |
675 | ||
676 | if (ieee80211_add_ext_srates_ie(sdata, skb, true, band) || | |
bf7cd94d JB |
677 | mesh_add_rsn_ie(sdata, skb) || |
678 | mesh_add_ht_cap_ie(sdata, skb) || | |
679 | mesh_add_ht_oper_ie(sdata, skb) || | |
680 | mesh_add_meshid_ie(sdata, skb) || | |
681 | mesh_add_meshconf_ie(sdata, skb) || | |
682 | mesh_add_awake_window_ie(sdata, skb) || | |
683 | mesh_add_vendor_ies(sdata, skb)) | |
2b5e1967 TP |
684 | goto out_free; |
685 | ||
686 | bcn->tail_len = skb->len; | |
687 | memcpy(bcn->tail, skb->data, bcn->tail_len); | |
688 | ||
689 | dev_kfree_skb(skb); | |
690 | rcu_assign_pointer(ifmsh->beacon, bcn); | |
691 | return 0; | |
692 | out_free: | |
693 | kfree(bcn); | |
694 | dev_kfree_skb(skb); | |
695 | return -ENOMEM; | |
696 | } | |
697 | ||
698 | static int | |
8d61ffa5 | 699 | ieee80211_mesh_rebuild_beacon(struct ieee80211_sub_if_data *sdata) |
2b5e1967 | 700 | { |
2b5e1967 TP |
701 | struct beacon_data *old_bcn; |
702 | int ret; | |
2b5e1967 | 703 | |
8d61ffa5 JB |
704 | old_bcn = rcu_dereference_protected(sdata->u.mesh.beacon, |
705 | lockdep_is_held(&sdata->wdev.mtx)); | |
706 | ret = ieee80211_mesh_build_beacon(&sdata->u.mesh); | |
2b5e1967 TP |
707 | if (ret) |
708 | /* just reuse old beacon */ | |
8d61ffa5 | 709 | return ret; |
2b5e1967 TP |
710 | |
711 | if (old_bcn) | |
712 | kfree_rcu(old_bcn, rcu_head); | |
8d61ffa5 | 713 | return 0; |
2b5e1967 TP |
714 | } |
715 | ||
716 | void ieee80211_mbss_info_change_notify(struct ieee80211_sub_if_data *sdata, | |
717 | u32 changed) | |
718 | { | |
f81a9ded TP |
719 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
720 | unsigned long bits = changed; | |
721 | u32 bit; | |
722 | ||
723 | if (!bits) | |
724 | return; | |
725 | ||
726 | /* if we race with running work, worst case this work becomes a noop */ | |
727 | for_each_set_bit(bit, &bits, sizeof(changed) * BITS_PER_BYTE) | |
728 | set_bit(bit, &ifmsh->mbss_changed); | |
729 | set_bit(MESH_WORK_MBSS_CHANGED, &ifmsh->wrkq_flags); | |
730 | ieee80211_queue_work(&sdata->local->hw, &sdata->work); | |
2b5e1967 TP |
731 | } |
732 | ||
733 | int ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata) | |
472dbc45 JB |
734 | { |
735 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
736 | struct ieee80211_local *local = sdata->local; | |
f4eabc91 CYY |
737 | u32 changed = BSS_CHANGED_BEACON | |
738 | BSS_CHANGED_BEACON_ENABLED | | |
739 | BSS_CHANGED_HT | | |
740 | BSS_CHANGED_BASIC_RATES | | |
741 | BSS_CHANGED_BEACON_INT; | |
472dbc45 | 742 | |
09b17470 JB |
743 | local->fif_other_bss++; |
744 | /* mesh ifaces must set allmulti to forward mcast traffic */ | |
745 | atomic_inc(&local->iff_allmultis); | |
746 | ieee80211_configure_filter(local); | |
747 | ||
c7108a71 | 748 | ifmsh->mesh_cc_id = 0; /* Disabled */ |
dbf498fb JC |
749 | /* register sync ops from extensible synchronization framework */ |
750 | ifmsh->sync_ops = ieee80211_mesh_sync_ops_get(ifmsh->mesh_sp_id); | |
751 | ifmsh->adjusting_tbtt = false; | |
752 | ifmsh->sync_offset_clockdrift_max = 0; | |
6b9ac442 | 753 | set_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags); |
63c5723b | 754 | ieee80211_mesh_root_setup(ifmsh); |
64592c8f | 755 | ieee80211_queue_work(&local->hw, &sdata->work); |
70c33eaa AN |
756 | sdata->vif.bss_conf.ht_operation_mode = |
757 | ifmsh->mshcfg.ht_opmode; | |
d6a83228 | 758 | sdata->vif.bss_conf.enable_beacon = true; |
f4eabc91 | 759 | |
39886b61 | 760 | changed |= ieee80211_mps_local_status_update(sdata); |
3f52b7e3 | 761 | |
2b5e1967 TP |
762 | if (ieee80211_mesh_build_beacon(ifmsh)) { |
763 | ieee80211_stop_mesh(sdata); | |
764 | return -ENOMEM; | |
765 | } | |
766 | ||
f4eabc91 | 767 | ieee80211_bss_info_change_notify(sdata, changed); |
c405c629 JB |
768 | |
769 | netif_carrier_on(sdata->dev); | |
2b5e1967 | 770 | return 0; |
472dbc45 JB |
771 | } |
772 | ||
773 | void ieee80211_stop_mesh(struct ieee80211_sub_if_data *sdata) | |
774 | { | |
09b17470 | 775 | struct ieee80211_local *local = sdata->local; |
29cbe68c | 776 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
2b5e1967 | 777 | struct beacon_data *bcn; |
29cbe68c | 778 | |
c405c629 JB |
779 | netif_carrier_off(sdata->dev); |
780 | ||
0d466b9c | 781 | /* stop the beacon */ |
29cbe68c | 782 | ifmsh->mesh_id_len = 0; |
d6a83228 JB |
783 | sdata->vif.bss_conf.enable_beacon = false; |
784 | clear_bit(SDATA_STATE_OFFCHANNEL_BEACON_STOPPED, &sdata->state); | |
29cbe68c | 785 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON_ENABLED); |
2b5e1967 | 786 | bcn = rcu_dereference_protected(ifmsh->beacon, |
8d61ffa5 | 787 | lockdep_is_held(&sdata->wdev.mtx)); |
2b5e1967 TP |
788 | rcu_assign_pointer(ifmsh->beacon, NULL); |
789 | kfree_rcu(bcn, rcu_head); | |
0d466b9c TP |
790 | |
791 | /* flush STAs and mpaths on this iface */ | |
b998e8bb | 792 | sta_info_flush(sdata); |
0d466b9c | 793 | mesh_path_flush_by_iface(sdata); |
09b17470 | 794 | |
3f52b7e3 MP |
795 | /* free all potentially still buffered group-addressed frames */ |
796 | local->total_ps_buffered -= skb_queue_len(&ifmsh->ps.bc_buf); | |
797 | skb_queue_purge(&ifmsh->ps.bc_buf); | |
798 | ||
472dbc45 | 799 | del_timer_sync(&sdata->u.mesh.housekeeping_timer); |
e304bfd3 | 800 | del_timer_sync(&sdata->u.mesh.mesh_path_root_timer); |
dd4c9260 | 801 | del_timer_sync(&sdata->u.mesh.mesh_path_timer); |
09b17470 | 802 | |
f81a9ded TP |
803 | /* clear any mesh work (for next join) we may have accrued */ |
804 | ifmsh->wrkq_flags = 0; | |
805 | ifmsh->mbss_changed = 0; | |
806 | ||
09b17470 JB |
807 | local->fif_other_bss--; |
808 | atomic_dec(&local->iff_allmultis); | |
809 | ieee80211_configure_filter(local); | |
472dbc45 JB |
810 | } |
811 | ||
9fb04b50 TP |
812 | static void |
813 | ieee80211_mesh_rx_probe_req(struct ieee80211_sub_if_data *sdata, | |
814 | struct ieee80211_mgmt *mgmt, size_t len) | |
815 | { | |
816 | struct ieee80211_local *local = sdata->local; | |
817 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
818 | struct sk_buff *presp; | |
819 | struct beacon_data *bcn; | |
820 | struct ieee80211_mgmt *hdr; | |
821 | struct ieee802_11_elems elems; | |
822 | size_t baselen; | |
511044ea | 823 | u8 *pos; |
9fb04b50 | 824 | |
9fb04b50 TP |
825 | pos = mgmt->u.probe_req.variable; |
826 | baselen = (u8 *) pos - (u8 *) mgmt; | |
827 | if (baselen > len) | |
828 | return; | |
829 | ||
b2e506bf | 830 | ieee802_11_parse_elems(pos, len - baselen, false, &elems); |
9fb04b50 TP |
831 | |
832 | /* 802.11-2012 10.1.4.3.2 */ | |
833 | if ((!ether_addr_equal(mgmt->da, sdata->vif.addr) && | |
834 | !is_broadcast_ether_addr(mgmt->da)) || | |
835 | elems.ssid_len != 0) | |
836 | return; | |
837 | ||
838 | if (elems.mesh_id_len != 0 && | |
839 | (elems.mesh_id_len != ifmsh->mesh_id_len || | |
840 | memcmp(elems.mesh_id, ifmsh->mesh_id, ifmsh->mesh_id_len))) | |
841 | return; | |
842 | ||
843 | rcu_read_lock(); | |
844 | bcn = rcu_dereference(ifmsh->beacon); | |
845 | ||
846 | if (!bcn) | |
847 | goto out; | |
848 | ||
849 | presp = dev_alloc_skb(local->tx_headroom + | |
850 | bcn->head_len + bcn->tail_len); | |
851 | if (!presp) | |
852 | goto out; | |
853 | ||
854 | skb_reserve(presp, local->tx_headroom); | |
855 | memcpy(skb_put(presp, bcn->head_len), bcn->head, bcn->head_len); | |
856 | memcpy(skb_put(presp, bcn->tail_len), bcn->tail, bcn->tail_len); | |
857 | hdr = (struct ieee80211_mgmt *) presp->data; | |
858 | hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
859 | IEEE80211_STYPE_PROBE_RESP); | |
860 | memcpy(hdr->da, mgmt->sa, ETH_ALEN); | |
9fb04b50 TP |
861 | IEEE80211_SKB_CB(presp)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
862 | ieee80211_tx_skb(sdata, presp); | |
863 | out: | |
864 | rcu_read_unlock(); | |
865 | } | |
866 | ||
472dbc45 JB |
867 | static void ieee80211_mesh_rx_bcn_presp(struct ieee80211_sub_if_data *sdata, |
868 | u16 stype, | |
869 | struct ieee80211_mgmt *mgmt, | |
870 | size_t len, | |
871 | struct ieee80211_rx_status *rx_status) | |
872 | { | |
c6a1fa12 | 873 | struct ieee80211_local *local = sdata->local; |
dbf498fb | 874 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
472dbc45 JB |
875 | struct ieee802_11_elems elems; |
876 | struct ieee80211_channel *channel; | |
472dbc45 JB |
877 | size_t baselen; |
878 | int freq; | |
879 | enum ieee80211_band band = rx_status->band; | |
880 | ||
881 | /* ignore ProbeResp to foreign address */ | |
882 | if (stype == IEEE80211_STYPE_PROBE_RESP && | |
b203ca39 | 883 | !ether_addr_equal(mgmt->da, sdata->vif.addr)) |
472dbc45 JB |
884 | return; |
885 | ||
886 | baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; | |
887 | if (baselen > len) | |
888 | return; | |
889 | ||
890 | ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, | |
b2e506bf | 891 | false, &elems); |
472dbc45 | 892 | |
9a90bc81 TP |
893 | /* ignore non-mesh or secure / unsecure mismatch */ |
894 | if ((!elems.mesh_id || !elems.mesh_config) || | |
895 | (elems.rsn && sdata->u.mesh.security == IEEE80211_MESH_SEC_NONE) || | |
896 | (!elems.rsn && sdata->u.mesh.security != IEEE80211_MESH_SEC_NONE)) | |
5cff5e01 JC |
897 | return; |
898 | ||
1cd8e88e | 899 | if (elems.ds_params) |
59eb21a6 | 900 | freq = ieee80211_channel_to_frequency(elems.ds_params[0], band); |
472dbc45 JB |
901 | else |
902 | freq = rx_status->freq; | |
903 | ||
904 | channel = ieee80211_get_channel(local->hw.wiphy, freq); | |
905 | ||
906 | if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) | |
907 | return; | |
908 | ||
9a90bc81 | 909 | if (mesh_matches_local(sdata, &elems)) |
f743ff49 | 910 | mesh_neighbour_update(sdata, mgmt->sa, &elems); |
dbf498fb JC |
911 | |
912 | if (ifmsh->sync_ops) | |
913 | ifmsh->sync_ops->rx_bcn_presp(sdata, | |
914 | stype, mgmt, &elems, rx_status); | |
472dbc45 JB |
915 | } |
916 | ||
917 | static void ieee80211_mesh_rx_mgmt_action(struct ieee80211_sub_if_data *sdata, | |
918 | struct ieee80211_mgmt *mgmt, | |
919 | size_t len, | |
920 | struct ieee80211_rx_status *rx_status) | |
921 | { | |
922 | switch (mgmt->u.action.category) { | |
8db09850 TP |
923 | case WLAN_CATEGORY_SELF_PROTECTED: |
924 | switch (mgmt->u.action.u.self_prot.action_code) { | |
925 | case WLAN_SP_MESH_PEERING_OPEN: | |
926 | case WLAN_SP_MESH_PEERING_CLOSE: | |
927 | case WLAN_SP_MESH_PEERING_CONFIRM: | |
928 | mesh_rx_plink_frame(sdata, mgmt, len, rx_status); | |
929 | break; | |
930 | } | |
472dbc45 | 931 | break; |
25d49e4d TP |
932 | case WLAN_CATEGORY_MESH_ACTION: |
933 | if (mesh_action_is_path_sel(mgmt)) | |
934 | mesh_rx_path_sel_frame(sdata, mgmt, len); | |
472dbc45 JB |
935 | break; |
936 | } | |
937 | } | |
938 | ||
1fa57d01 JB |
939 | void ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, |
940 | struct sk_buff *skb) | |
472dbc45 JB |
941 | { |
942 | struct ieee80211_rx_status *rx_status; | |
472dbc45 JB |
943 | struct ieee80211_mgmt *mgmt; |
944 | u16 stype; | |
945 | ||
ecccd072 TP |
946 | sdata_lock(sdata); |
947 | ||
948 | /* mesh already went down */ | |
949 | if (!sdata->wdev.mesh_id_len) | |
950 | goto out; | |
951 | ||
f1d58c25 | 952 | rx_status = IEEE80211_SKB_RXCB(skb); |
472dbc45 JB |
953 | mgmt = (struct ieee80211_mgmt *) skb->data; |
954 | stype = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE; | |
955 | ||
956 | switch (stype) { | |
957 | case IEEE80211_STYPE_PROBE_RESP: | |
958 | case IEEE80211_STYPE_BEACON: | |
959 | ieee80211_mesh_rx_bcn_presp(sdata, stype, mgmt, skb->len, | |
960 | rx_status); | |
961 | break; | |
9fb04b50 TP |
962 | case IEEE80211_STYPE_PROBE_REQ: |
963 | ieee80211_mesh_rx_probe_req(sdata, mgmt, skb->len); | |
964 | break; | |
472dbc45 JB |
965 | case IEEE80211_STYPE_ACTION: |
966 | ieee80211_mesh_rx_mgmt_action(sdata, mgmt, skb->len, rx_status); | |
967 | break; | |
968 | } | |
ecccd072 TP |
969 | out: |
970 | sdata_unlock(sdata); | |
472dbc45 JB |
971 | } |
972 | ||
f81a9ded TP |
973 | static void mesh_bss_info_changed(struct ieee80211_sub_if_data *sdata) |
974 | { | |
975 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
976 | u32 bit, changed = 0; | |
977 | ||
978 | for_each_set_bit(bit, &ifmsh->mbss_changed, | |
979 | sizeof(changed) * BITS_PER_BYTE) { | |
980 | clear_bit(bit, &ifmsh->mbss_changed); | |
981 | changed |= BIT(bit); | |
982 | } | |
983 | ||
984 | if (sdata->vif.bss_conf.enable_beacon && | |
985 | (changed & (BSS_CHANGED_BEACON | | |
986 | BSS_CHANGED_HT | | |
987 | BSS_CHANGED_BASIC_RATES | | |
988 | BSS_CHANGED_BEACON_INT))) | |
989 | if (ieee80211_mesh_rebuild_beacon(sdata)) | |
990 | return; | |
991 | ||
992 | ieee80211_bss_info_change_notify(sdata, changed); | |
993 | } | |
994 | ||
1fa57d01 | 995 | void ieee80211_mesh_work(struct ieee80211_sub_if_data *sdata) |
472dbc45 | 996 | { |
472dbc45 | 997 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
472dbc45 | 998 | |
ecccd072 TP |
999 | sdata_lock(sdata); |
1000 | ||
1001 | /* mesh already went down */ | |
1002 | if (!sdata->wdev.mesh_id_len) | |
1003 | goto out; | |
1004 | ||
472dbc45 JB |
1005 | if (ifmsh->preq_queue_len && |
1006 | time_after(jiffies, | |
1007 | ifmsh->last_preq + msecs_to_jiffies(ifmsh->mshcfg.dot11MeshHWMPpreqMinInterval))) | |
1008 | mesh_path_start_discovery(sdata); | |
1009 | ||
18889231 JC |
1010 | if (test_and_clear_bit(MESH_WORK_GROW_MPATH_TABLE, &ifmsh->wrkq_flags)) |
1011 | mesh_mpath_table_grow(); | |
1012 | ||
dcac908b | 1013 | if (test_and_clear_bit(MESH_WORK_GROW_MPP_TABLE, &ifmsh->wrkq_flags)) |
18889231 JC |
1014 | mesh_mpp_table_grow(); |
1015 | ||
1016 | if (test_and_clear_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags)) | |
bf7cd94d | 1017 | ieee80211_mesh_housekeeping(sdata); |
e304bfd3 RP |
1018 | |
1019 | if (test_and_clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags)) | |
1020 | ieee80211_mesh_rootpath(sdata); | |
dbf498fb JC |
1021 | |
1022 | if (test_and_clear_bit(MESH_WORK_DRIFT_ADJUST, &ifmsh->wrkq_flags)) | |
1023 | mesh_sync_adjust_tbtt(sdata); | |
ecccd072 | 1024 | |
f81a9ded TP |
1025 | if (test_and_clear_bit(MESH_WORK_MBSS_CHANGED, &ifmsh->wrkq_flags)) |
1026 | mesh_bss_info_changed(sdata); | |
ecccd072 TP |
1027 | out: |
1028 | sdata_unlock(sdata); | |
472dbc45 JB |
1029 | } |
1030 | ||
1031 | void ieee80211_mesh_notify_scan_completed(struct ieee80211_local *local) | |
1032 | { | |
1033 | struct ieee80211_sub_if_data *sdata; | |
1034 | ||
1035 | rcu_read_lock(); | |
1036 | list_for_each_entry_rcu(sdata, &local->interfaces, list) | |
370bd005 BG |
1037 | if (ieee80211_vif_is_mesh(&sdata->vif) && |
1038 | ieee80211_sdata_running(sdata)) | |
64592c8f | 1039 | ieee80211_queue_work(&local->hw, &sdata->work); |
472dbc45 JB |
1040 | rcu_read_unlock(); |
1041 | } | |
1042 | ||
902acc78 JB |
1043 | void ieee80211_mesh_init_sdata(struct ieee80211_sub_if_data *sdata) |
1044 | { | |
472dbc45 | 1045 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
ad2d223a | 1046 | static u8 zero_addr[ETH_ALEN] = {}; |
472dbc45 | 1047 | |
472dbc45 JB |
1048 | setup_timer(&ifmsh->housekeeping_timer, |
1049 | ieee80211_mesh_housekeeping_timer, | |
1050 | (unsigned long) sdata); | |
472dbc45 | 1051 | |
472dbc45 JB |
1052 | ifmsh->accepting_plinks = true; |
1053 | ifmsh->preq_id = 0; | |
d19b3bf6 | 1054 | ifmsh->sn = 0; |
5ee68e5b | 1055 | ifmsh->num_gates = 0; |
472dbc45 | 1056 | atomic_set(&ifmsh->mpaths, 0); |
f698d856 | 1057 | mesh_rmc_init(sdata); |
472dbc45 | 1058 | ifmsh->last_preq = jiffies; |
dca7e943 | 1059 | ifmsh->next_perr = jiffies; |
902acc78 JB |
1060 | /* Allocate all mesh structures when creating the first mesh interface. */ |
1061 | if (!mesh_allocated) | |
1062 | ieee80211s_init(); | |
472dbc45 | 1063 | setup_timer(&ifmsh->mesh_path_timer, |
902acc78 JB |
1064 | ieee80211_mesh_path_timer, |
1065 | (unsigned long) sdata); | |
e304bfd3 RP |
1066 | setup_timer(&ifmsh->mesh_path_root_timer, |
1067 | ieee80211_mesh_path_root_timer, | |
1068 | (unsigned long) sdata); | |
472dbc45 | 1069 | INIT_LIST_HEAD(&ifmsh->preq_queue.list); |
3f52b7e3 | 1070 | skb_queue_head_init(&ifmsh->ps.bc_buf); |
472dbc45 | 1071 | spin_lock_init(&ifmsh->mesh_preq_queue_lock); |
dbf498fb | 1072 | spin_lock_init(&ifmsh->sync_offset_lock); |
2b5e1967 | 1073 | RCU_INIT_POINTER(ifmsh->beacon, NULL); |
ad2d223a JB |
1074 | |
1075 | sdata->vif.bss_conf.bssid = zero_addr; | |
472dbc45 | 1076 | } |