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 | ||
8d61ffa5 JB |
164 | if (changed) { |
165 | sdata_lock(sdata); | |
2b5e1967 | 166 | ieee80211_mbss_info_change_notify(sdata, changed); |
8d61ffa5 JB |
167 | sdata_unlock(sdata); |
168 | } | |
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 | ||
265 | /* Active path selection protocol ID */ | |
266 | *pos++ = ifmsh->mesh_pp_id; | |
267 | /* Active path selection metric ID */ | |
268 | *pos++ = ifmsh->mesh_pm_id; | |
269 | /* Congestion control mode identifier */ | |
270 | *pos++ = ifmsh->mesh_cc_id; | |
271 | /* Synchronization protocol identifier */ | |
272 | *pos++ = ifmsh->mesh_sp_id; | |
273 | /* Authentication Protocol identifier */ | |
274 | *pos++ = ifmsh->mesh_auth_id; | |
275 | /* Mesh Formation Info - number of neighbors */ | |
1258d976 | 276 | neighbors = atomic_read(&ifmsh->estab_plinks); |
082ebb0c TP |
277 | /* Number of neighbor mesh STAs or 15 whichever is smaller */ |
278 | neighbors = (neighbors > 15) ? 15 : neighbors; | |
279 | *pos++ = neighbors << 1; | |
280 | /* Mesh capability */ | |
65821635 | 281 | *pos = IEEE80211_MESHCONF_CAPAB_FORWARDING; |
dbf498fb | 282 | *pos |= ifmsh->accepting_plinks ? |
bf7cd94d | 283 | IEEE80211_MESHCONF_CAPAB_ACCEPT_PLINKS : 0x00; |
3f52b7e3 MP |
284 | /* Mesh PS mode. See IEEE802.11-2012 8.4.2.100.8 */ |
285 | *pos |= ifmsh->ps_peers_deep_sleep ? | |
bf7cd94d | 286 | IEEE80211_MESHCONF_CAPAB_POWER_SAVE_LEVEL : 0x00; |
dbf498fb | 287 | *pos++ |= ifmsh->adjusting_tbtt ? |
bf7cd94d | 288 | IEEE80211_MESHCONF_CAPAB_TBTT_ADJUSTING : 0x00; |
082ebb0c TP |
289 | *pos++ = 0x00; |
290 | ||
291 | return 0; | |
292 | } | |
293 | ||
bf7cd94d | 294 | int mesh_add_meshid_ie(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb) |
082ebb0c TP |
295 | { |
296 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
297 | u8 *pos; | |
298 | ||
299 | if (skb_tailroom(skb) < 2 + ifmsh->mesh_id_len) | |
300 | return -ENOMEM; | |
301 | ||
302 | pos = skb_put(skb, 2 + ifmsh->mesh_id_len); | |
303 | *pos++ = WLAN_EID_MESH_ID; | |
304 | *pos++ = ifmsh->mesh_id_len; | |
305 | if (ifmsh->mesh_id_len) | |
306 | memcpy(pos, ifmsh->mesh_id, ifmsh->mesh_id_len); | |
307 | ||
308 | return 0; | |
309 | } | |
310 | ||
bf7cd94d JB |
311 | static int mesh_add_awake_window_ie(struct ieee80211_sub_if_data *sdata, |
312 | struct sk_buff *skb) | |
3f52b7e3 MP |
313 | { |
314 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
315 | u8 *pos; | |
316 | ||
317 | /* see IEEE802.11-2012 13.14.6 */ | |
318 | if (ifmsh->ps_peers_light_sleep == 0 && | |
319 | ifmsh->ps_peers_deep_sleep == 0 && | |
320 | ifmsh->nonpeer_pm == NL80211_MESH_POWER_ACTIVE) | |
321 | return 0; | |
322 | ||
323 | if (skb_tailroom(skb) < 4) | |
324 | return -ENOMEM; | |
325 | ||
326 | pos = skb_put(skb, 2 + 2); | |
327 | *pos++ = WLAN_EID_MESH_AWAKE_WINDOW; | |
328 | *pos++ = 2; | |
329 | put_unaligned_le16(ifmsh->mshcfg.dot11MeshAwakeWindowDuration, pos); | |
330 | ||
331 | return 0; | |
332 | } | |
333 | ||
bf7cd94d JB |
334 | int mesh_add_vendor_ies(struct ieee80211_sub_if_data *sdata, |
335 | struct sk_buff *skb) | |
082ebb0c TP |
336 | { |
337 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
338 | u8 offset, len; | |
339 | const u8 *data; | |
340 | ||
341 | if (!ifmsh->ie || !ifmsh->ie_len) | |
342 | return 0; | |
343 | ||
344 | /* fast-forward to vendor IEs */ | |
345 | offset = ieee80211_ie_split_vendor(ifmsh->ie, ifmsh->ie_len, 0); | |
346 | ||
347 | if (offset) { | |
348 | len = ifmsh->ie_len - offset; | |
349 | data = ifmsh->ie + offset; | |
350 | if (skb_tailroom(skb) < len) | |
351 | return -ENOMEM; | |
352 | memcpy(skb_put(skb, len), data, len); | |
353 | } | |
354 | ||
355 | return 0; | |
356 | } | |
357 | ||
bf7cd94d | 358 | int mesh_add_rsn_ie(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb) |
082ebb0c TP |
359 | { |
360 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
361 | u8 len = 0; | |
362 | const u8 *data; | |
363 | ||
364 | if (!ifmsh->ie || !ifmsh->ie_len) | |
365 | return 0; | |
366 | ||
367 | /* find RSN IE */ | |
368 | data = ifmsh->ie; | |
369 | while (data < ifmsh->ie + ifmsh->ie_len) { | |
370 | if (*data == WLAN_EID_RSN) { | |
371 | len = data[1] + 2; | |
372 | break; | |
373 | } | |
374 | data++; | |
375 | } | |
376 | ||
377 | if (len) { | |
378 | if (skb_tailroom(skb) < len) | |
379 | return -ENOMEM; | |
380 | memcpy(skb_put(skb, len), data, len); | |
381 | } | |
382 | ||
383 | return 0; | |
384 | } | |
385 | ||
bf7cd94d JB |
386 | static int mesh_add_ds_params_ie(struct ieee80211_sub_if_data *sdata, |
387 | struct sk_buff *skb) | |
082ebb0c | 388 | { |
55de908a JB |
389 | struct ieee80211_chanctx_conf *chanctx_conf; |
390 | struct ieee80211_channel *chan; | |
082ebb0c | 391 | u8 *pos; |
2e3c8736 | 392 | |
082ebb0c TP |
393 | if (skb_tailroom(skb) < 3) |
394 | return -ENOMEM; | |
395 | ||
55de908a JB |
396 | rcu_read_lock(); |
397 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
398 | if (WARN_ON(!chanctx_conf)) { | |
399 | rcu_read_unlock(); | |
400 | return -EINVAL; | |
401 | } | |
4bf88530 | 402 | chan = chanctx_conf->def.chan; |
55de908a JB |
403 | rcu_read_unlock(); |
404 | ||
601513aa ET |
405 | pos = skb_put(skb, 2 + 1); |
406 | *pos++ = WLAN_EID_DS_PARAMS; | |
407 | *pos++ = 1; | |
408 | *pos++ = ieee80211_frequency_to_channel(chan->center_freq); | |
be125c60 | 409 | |
082ebb0c | 410 | return 0; |
2e3c8736 LCC |
411 | } |
412 | ||
bf7cd94d JB |
413 | int mesh_add_ht_cap_ie(struct ieee80211_sub_if_data *sdata, |
414 | struct sk_buff *skb) | |
176f3608 TP |
415 | { |
416 | struct ieee80211_local *local = sdata->local; | |
55de908a | 417 | enum ieee80211_band band = ieee80211_get_sdata_band(sdata); |
176f3608 TP |
418 | struct ieee80211_supported_band *sband; |
419 | u8 *pos; | |
420 | ||
55de908a | 421 | sband = local->hw.wiphy->bands[band]; |
176f3608 | 422 | if (!sband->ht_cap.ht_supported || |
4bf88530 | 423 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT) |
176f3608 TP |
424 | return 0; |
425 | ||
426 | if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_ht_cap)) | |
427 | return -ENOMEM; | |
428 | ||
429 | pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_cap)); | |
ef96a842 | 430 | ieee80211_ie_build_ht_cap(pos, &sband->ht_cap, sband->ht_cap.cap); |
176f3608 TP |
431 | |
432 | return 0; | |
433 | } | |
434 | ||
bf7cd94d JB |
435 | int mesh_add_ht_oper_ie(struct ieee80211_sub_if_data *sdata, |
436 | struct sk_buff *skb) | |
176f3608 TP |
437 | { |
438 | struct ieee80211_local *local = sdata->local; | |
55de908a JB |
439 | struct ieee80211_chanctx_conf *chanctx_conf; |
440 | struct ieee80211_channel *channel; | |
466f310d | 441 | enum nl80211_channel_type channel_type = |
4bf88530 | 442 | cfg80211_get_chandef_type(&sdata->vif.bss_conf.chandef); |
55de908a JB |
443 | struct ieee80211_supported_band *sband; |
444 | struct ieee80211_sta_ht_cap *ht_cap; | |
176f3608 TP |
445 | u8 *pos; |
446 | ||
55de908a JB |
447 | rcu_read_lock(); |
448 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
449 | if (WARN_ON(!chanctx_conf)) { | |
450 | rcu_read_unlock(); | |
451 | return -EINVAL; | |
452 | } | |
4bf88530 | 453 | channel = chanctx_conf->def.chan; |
55de908a JB |
454 | rcu_read_unlock(); |
455 | ||
456 | sband = local->hw.wiphy->bands[channel->band]; | |
457 | ht_cap = &sband->ht_cap; | |
458 | ||
176f3608 TP |
459 | if (!ht_cap->ht_supported || channel_type == NL80211_CHAN_NO_HT) |
460 | return 0; | |
461 | ||
074d46d1 | 462 | if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_ht_operation)) |
176f3608 TP |
463 | return -ENOMEM; |
464 | ||
074d46d1 | 465 | pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_operation)); |
4bf88530 | 466 | ieee80211_ie_build_ht_oper(pos, ht_cap, &sdata->vif.bss_conf.chandef, |
431e3154 | 467 | sdata->vif.bss_conf.ht_operation_mode); |
176f3608 TP |
468 | |
469 | return 0; | |
470 | } | |
bf7cd94d | 471 | |
2e3c8736 LCC |
472 | static void ieee80211_mesh_path_timer(unsigned long data) |
473 | { | |
474 | struct ieee80211_sub_if_data *sdata = | |
475 | (struct ieee80211_sub_if_data *) data; | |
5bb644a0 | 476 | |
690205f1 | 477 | ieee80211_queue_work(&sdata->local->hw, &sdata->work); |
2e3c8736 LCC |
478 | } |
479 | ||
e304bfd3 RP |
480 | static void ieee80211_mesh_path_root_timer(unsigned long data) |
481 | { | |
482 | struct ieee80211_sub_if_data *sdata = | |
483 | (struct ieee80211_sub_if_data *) data; | |
484 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
e304bfd3 RP |
485 | |
486 | set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); | |
487 | ||
690205f1 | 488 | ieee80211_queue_work(&sdata->local->hw, &sdata->work); |
e304bfd3 RP |
489 | } |
490 | ||
63c5723b RP |
491 | void ieee80211_mesh_root_setup(struct ieee80211_if_mesh *ifmsh) |
492 | { | |
dbb912cd | 493 | if (ifmsh->mshcfg.dot11MeshHWMPRootMode > IEEE80211_ROOTMODE_ROOT) |
63c5723b RP |
494 | set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); |
495 | else { | |
496 | clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); | |
497 | /* stop running timer */ | |
498 | del_timer_sync(&ifmsh->mesh_path_root_timer); | |
499 | } | |
500 | } | |
501 | ||
3c5772a5 JC |
502 | /** |
503 | * ieee80211_fill_mesh_addresses - fill addresses of a locally originated mesh frame | |
bf7cd94d | 504 | * @hdr: 802.11 frame header |
3c5772a5 JC |
505 | * @fc: frame control field |
506 | * @meshda: destination address in the mesh | |
507 | * @meshsa: source address address in the mesh. Same as TA, as frame is | |
508 | * locally originated. | |
509 | * | |
510 | * Return the length of the 802.11 (does not include a mesh control header) | |
511 | */ | |
15ff6365 JB |
512 | int ieee80211_fill_mesh_addresses(struct ieee80211_hdr *hdr, __le16 *fc, |
513 | const u8 *meshda, const u8 *meshsa) | |
514 | { | |
3c5772a5 JC |
515 | if (is_multicast_ether_addr(meshda)) { |
516 | *fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS); | |
517 | /* DA TA SA */ | |
518 | memcpy(hdr->addr1, meshda, ETH_ALEN); | |
519 | memcpy(hdr->addr2, meshsa, ETH_ALEN); | |
520 | memcpy(hdr->addr3, meshsa, ETH_ALEN); | |
521 | return 24; | |
522 | } else { | |
2154c81c | 523 | *fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); |
3c5772a5 JC |
524 | /* RA TA DA SA */ |
525 | memset(hdr->addr1, 0, ETH_ALEN); /* RA is resolved later */ | |
526 | memcpy(hdr->addr2, meshsa, ETH_ALEN); | |
527 | memcpy(hdr->addr3, meshda, ETH_ALEN); | |
528 | memcpy(hdr->addr4, meshsa, ETH_ALEN); | |
529 | return 30; | |
530 | } | |
531 | } | |
532 | ||
902acc78 JB |
533 | /** |
534 | * ieee80211_new_mesh_header - create a new mesh header | |
902acc78 | 535 | * @sdata: mesh interface to be used |
bf7cd94d | 536 | * @meshhdr: uninitialized mesh header |
61ad5394 JC |
537 | * @addr4or5: 1st address in the ae header, which may correspond to address 4 |
538 | * (if addr6 is NULL) or address 5 (if addr6 is present). It may | |
539 | * be NULL. | |
540 | * @addr6: 2nd address in the ae header, which corresponds to addr6 of the | |
541 | * mesh frame | |
902acc78 JB |
542 | * |
543 | * Return the header length. | |
544 | */ | |
bf7cd94d JB |
545 | int ieee80211_new_mesh_header(struct ieee80211_sub_if_data *sdata, |
546 | struct ieee80211s_hdr *meshhdr, | |
547 | const char *addr4or5, const char *addr6) | |
902acc78 | 548 | { |
bf7cd94d JB |
549 | if (WARN_ON(!addr4or5 && addr6)) |
550 | return 0; | |
551 | ||
0c3cee72 | 552 | memset(meshhdr, 0, sizeof(*meshhdr)); |
bf7cd94d | 553 | |
472dbc45 | 554 | meshhdr->ttl = sdata->u.mesh.mshcfg.dot11MeshTTL; |
bf7cd94d JB |
555 | |
556 | /* FIXME: racy -- TX on multiple queues can be concurrent */ | |
472dbc45 JB |
557 | put_unaligned(cpu_to_le32(sdata->u.mesh.mesh_seqnum), &meshhdr->seqnum); |
558 | sdata->u.mesh.mesh_seqnum++; | |
bf7cd94d | 559 | |
61ad5394 | 560 | if (addr4or5 && !addr6) { |
3c5772a5 | 561 | meshhdr->flags |= MESH_FLAGS_AE_A4; |
61ad5394 | 562 | memcpy(meshhdr->eaddr1, addr4or5, ETH_ALEN); |
bf7cd94d | 563 | return 2 * ETH_ALEN; |
61ad5394 | 564 | } else if (addr4or5 && addr6) { |
3c5772a5 | 565 | meshhdr->flags |= MESH_FLAGS_AE_A5_A6; |
61ad5394 JC |
566 | memcpy(meshhdr->eaddr1, addr4or5, ETH_ALEN); |
567 | memcpy(meshhdr->eaddr2, addr6, ETH_ALEN); | |
bf7cd94d | 568 | return 3 * ETH_ALEN; |
3c5772a5 | 569 | } |
bf7cd94d JB |
570 | |
571 | return ETH_ALEN; | |
902acc78 JB |
572 | } |
573 | ||
bf7cd94d | 574 | static void ieee80211_mesh_housekeeping(struct ieee80211_sub_if_data *sdata) |
472dbc45 | 575 | { |
bf7cd94d | 576 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
df323818 | 577 | u32 changed; |
472dbc45 | 578 | |
472dbc45 JB |
579 | ieee80211_sta_expire(sdata, IEEE80211_MESH_PEER_INACTIVITY_LIMIT); |
580 | mesh_path_expire(sdata); | |
581 | ||
df323818 | 582 | changed = mesh_accept_plinks_update(sdata); |
8d61ffa5 | 583 | sdata_lock(sdata); |
2b5e1967 | 584 | ieee80211_mbss_info_change_notify(sdata, changed); |
8d61ffa5 | 585 | sdata_unlock(sdata); |
472dbc45 | 586 | |
472dbc45 | 587 | mod_timer(&ifmsh->housekeeping_timer, |
bf7cd94d JB |
588 | round_jiffies(jiffies + |
589 | IEEE80211_MESH_HOUSEKEEPING_INTERVAL)); | |
472dbc45 JB |
590 | } |
591 | ||
e304bfd3 RP |
592 | static void ieee80211_mesh_rootpath(struct ieee80211_sub_if_data *sdata) |
593 | { | |
594 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
a69cc44f | 595 | u32 interval; |
e304bfd3 RP |
596 | |
597 | mesh_path_tx_root_frame(sdata); | |
a69cc44f CYY |
598 | |
599 | if (ifmsh->mshcfg.dot11MeshHWMPRootMode == IEEE80211_PROACTIVE_RANN) | |
600 | interval = ifmsh->mshcfg.dot11MeshHWMPRannInterval; | |
601 | else | |
602 | interval = ifmsh->mshcfg.dot11MeshHWMProotInterval; | |
603 | ||
e304bfd3 | 604 | mod_timer(&ifmsh->mesh_path_root_timer, |
a69cc44f | 605 | round_jiffies(TU_TO_EXP_TIME(interval))); |
e304bfd3 RP |
606 | } |
607 | ||
2b5e1967 TP |
608 | static int |
609 | ieee80211_mesh_build_beacon(struct ieee80211_if_mesh *ifmsh) | |
610 | { | |
611 | struct beacon_data *bcn; | |
612 | int head_len, tail_len; | |
613 | struct sk_buff *skb; | |
614 | struct ieee80211_mgmt *mgmt; | |
615 | struct ieee80211_chanctx_conf *chanctx_conf; | |
616 | enum ieee80211_band band; | |
617 | u8 *pos; | |
618 | struct ieee80211_sub_if_data *sdata; | |
619 | int hdr_len = offsetof(struct ieee80211_mgmt, u.beacon) + | |
620 | sizeof(mgmt->u.beacon); | |
621 | ||
622 | sdata = container_of(ifmsh, struct ieee80211_sub_if_data, u.mesh); | |
623 | rcu_read_lock(); | |
624 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
625 | band = chanctx_conf->def.chan->band; | |
626 | rcu_read_unlock(); | |
627 | ||
628 | head_len = hdr_len + | |
629 | 2 + /* NULL SSID */ | |
630 | 2 + 8 + /* supported rates */ | |
631 | 2 + 3; /* DS params */ | |
632 | tail_len = 2 + (IEEE80211_MAX_SUPP_RATES - 8) + | |
633 | 2 + sizeof(struct ieee80211_ht_cap) + | |
634 | 2 + sizeof(struct ieee80211_ht_operation) + | |
635 | 2 + ifmsh->mesh_id_len + | |
636 | 2 + sizeof(struct ieee80211_meshconf_ie) + | |
637 | 2 + sizeof(__le16) + /* awake window */ | |
638 | ifmsh->ie_len; | |
639 | ||
640 | bcn = kzalloc(sizeof(*bcn) + head_len + tail_len, GFP_KERNEL); | |
641 | /* need an skb for IE builders to operate on */ | |
642 | skb = dev_alloc_skb(max(head_len, tail_len)); | |
643 | ||
644 | if (!bcn || !skb) | |
645 | goto out_free; | |
646 | ||
647 | /* | |
648 | * pointers go into the block we allocated, | |
649 | * memory is | beacon_data | head | tail | | |
650 | */ | |
651 | bcn->head = ((u8 *) bcn) + sizeof(*bcn); | |
652 | ||
653 | /* fill in the head */ | |
654 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, hdr_len); | |
655 | memset(mgmt, 0, hdr_len); | |
656 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
657 | IEEE80211_STYPE_BEACON); | |
658 | eth_broadcast_addr(mgmt->da); | |
659 | memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); | |
660 | memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN); | |
661 | ieee80211_mps_set_frame_flags(sdata, NULL, (void *) mgmt); | |
662 | mgmt->u.beacon.beacon_int = | |
663 | cpu_to_le16(sdata->vif.bss_conf.beacon_int); | |
664 | mgmt->u.beacon.capab_info |= cpu_to_le16( | |
665 | sdata->u.mesh.security ? WLAN_CAPABILITY_PRIVACY : 0); | |
666 | ||
667 | pos = skb_put(skb, 2); | |
668 | *pos++ = WLAN_EID_SSID; | |
669 | *pos++ = 0x0; | |
670 | ||
671 | if (ieee80211_add_srates_ie(sdata, skb, true, band) || | |
bf7cd94d | 672 | mesh_add_ds_params_ie(sdata, skb)) |
2b5e1967 TP |
673 | goto out_free; |
674 | ||
675 | bcn->head_len = skb->len; | |
676 | memcpy(bcn->head, skb->data, bcn->head_len); | |
677 | ||
678 | /* now the tail */ | |
679 | skb_trim(skb, 0); | |
680 | bcn->tail = bcn->head + bcn->head_len; | |
681 | ||
682 | if (ieee80211_add_ext_srates_ie(sdata, skb, true, band) || | |
bf7cd94d JB |
683 | mesh_add_rsn_ie(sdata, skb) || |
684 | mesh_add_ht_cap_ie(sdata, skb) || | |
685 | mesh_add_ht_oper_ie(sdata, skb) || | |
686 | mesh_add_meshid_ie(sdata, skb) || | |
687 | mesh_add_meshconf_ie(sdata, skb) || | |
688 | mesh_add_awake_window_ie(sdata, skb) || | |
689 | mesh_add_vendor_ies(sdata, skb)) | |
2b5e1967 TP |
690 | goto out_free; |
691 | ||
692 | bcn->tail_len = skb->len; | |
693 | memcpy(bcn->tail, skb->data, bcn->tail_len); | |
694 | ||
695 | dev_kfree_skb(skb); | |
696 | rcu_assign_pointer(ifmsh->beacon, bcn); | |
697 | return 0; | |
698 | out_free: | |
699 | kfree(bcn); | |
700 | dev_kfree_skb(skb); | |
701 | return -ENOMEM; | |
702 | } | |
703 | ||
704 | static int | |
8d61ffa5 | 705 | ieee80211_mesh_rebuild_beacon(struct ieee80211_sub_if_data *sdata) |
2b5e1967 | 706 | { |
2b5e1967 TP |
707 | struct beacon_data *old_bcn; |
708 | int ret; | |
2b5e1967 | 709 | |
8d61ffa5 JB |
710 | old_bcn = rcu_dereference_protected(sdata->u.mesh.beacon, |
711 | lockdep_is_held(&sdata->wdev.mtx)); | |
712 | ret = ieee80211_mesh_build_beacon(&sdata->u.mesh); | |
2b5e1967 TP |
713 | if (ret) |
714 | /* just reuse old beacon */ | |
8d61ffa5 | 715 | return ret; |
2b5e1967 TP |
716 | |
717 | if (old_bcn) | |
718 | kfree_rcu(old_bcn, rcu_head); | |
8d61ffa5 | 719 | return 0; |
2b5e1967 TP |
720 | } |
721 | ||
722 | void ieee80211_mbss_info_change_notify(struct ieee80211_sub_if_data *sdata, | |
723 | u32 changed) | |
724 | { | |
725 | if (sdata->vif.bss_conf.enable_beacon && | |
726 | (changed & (BSS_CHANGED_BEACON | | |
727 | BSS_CHANGED_HT | | |
728 | BSS_CHANGED_BASIC_RATES | | |
729 | BSS_CHANGED_BEACON_INT))) | |
8d61ffa5 | 730 | if (ieee80211_mesh_rebuild_beacon(sdata)) |
2b5e1967 TP |
731 | return; |
732 | ieee80211_bss_info_change_notify(sdata, changed); | |
733 | } | |
734 | ||
735 | int ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata) | |
472dbc45 JB |
736 | { |
737 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
738 | struct ieee80211_local *local = sdata->local; | |
f4eabc91 CYY |
739 | u32 changed = BSS_CHANGED_BEACON | |
740 | BSS_CHANGED_BEACON_ENABLED | | |
741 | BSS_CHANGED_HT | | |
742 | BSS_CHANGED_BASIC_RATES | | |
743 | BSS_CHANGED_BEACON_INT; | |
744 | enum ieee80211_band band = ieee80211_get_sdata_band(sdata); | |
b422c6cd AN |
745 | struct ieee80211_supported_band *sband = |
746 | sdata->local->hw.wiphy->bands[band]; | |
472dbc45 | 747 | |
09b17470 JB |
748 | local->fif_other_bss++; |
749 | /* mesh ifaces must set allmulti to forward mcast traffic */ | |
750 | atomic_inc(&local->iff_allmultis); | |
751 | ieee80211_configure_filter(local); | |
752 | ||
c7108a71 | 753 | ifmsh->mesh_cc_id = 0; /* Disabled */ |
dbf498fb JC |
754 | /* register sync ops from extensible synchronization framework */ |
755 | ifmsh->sync_ops = ieee80211_mesh_sync_ops_get(ifmsh->mesh_sp_id); | |
756 | ifmsh->adjusting_tbtt = false; | |
757 | ifmsh->sync_offset_clockdrift_max = 0; | |
6b9ac442 | 758 | set_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags); |
63c5723b | 759 | ieee80211_mesh_root_setup(ifmsh); |
64592c8f | 760 | ieee80211_queue_work(&local->hw, &sdata->work); |
70c33eaa AN |
761 | sdata->vif.bss_conf.ht_operation_mode = |
762 | ifmsh->mshcfg.ht_opmode; | |
d6a83228 | 763 | sdata->vif.bss_conf.enable_beacon = true; |
b422c6cd | 764 | sdata->vif.bss_conf.basic_rates = ieee80211_mandatory_rates(sband); |
f4eabc91 | 765 | |
39886b61 | 766 | changed |= ieee80211_mps_local_status_update(sdata); |
3f52b7e3 | 767 | |
2b5e1967 TP |
768 | if (ieee80211_mesh_build_beacon(ifmsh)) { |
769 | ieee80211_stop_mesh(sdata); | |
770 | return -ENOMEM; | |
771 | } | |
772 | ||
f4eabc91 | 773 | ieee80211_bss_info_change_notify(sdata, changed); |
c405c629 JB |
774 | |
775 | netif_carrier_on(sdata->dev); | |
2b5e1967 | 776 | return 0; |
472dbc45 JB |
777 | } |
778 | ||
779 | void ieee80211_stop_mesh(struct ieee80211_sub_if_data *sdata) | |
780 | { | |
09b17470 | 781 | struct ieee80211_local *local = sdata->local; |
29cbe68c | 782 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
2b5e1967 | 783 | struct beacon_data *bcn; |
29cbe68c | 784 | |
c405c629 JB |
785 | netif_carrier_off(sdata->dev); |
786 | ||
0d466b9c | 787 | /* stop the beacon */ |
29cbe68c | 788 | ifmsh->mesh_id_len = 0; |
d6a83228 JB |
789 | sdata->vif.bss_conf.enable_beacon = false; |
790 | clear_bit(SDATA_STATE_OFFCHANNEL_BEACON_STOPPED, &sdata->state); | |
29cbe68c | 791 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON_ENABLED); |
8d61ffa5 | 792 | sdata_lock(sdata); |
2b5e1967 | 793 | bcn = rcu_dereference_protected(ifmsh->beacon, |
8d61ffa5 | 794 | lockdep_is_held(&sdata->wdev.mtx)); |
2b5e1967 TP |
795 | rcu_assign_pointer(ifmsh->beacon, NULL); |
796 | kfree_rcu(bcn, rcu_head); | |
8d61ffa5 | 797 | sdata_unlock(sdata); |
0d466b9c TP |
798 | |
799 | /* flush STAs and mpaths on this iface */ | |
b998e8bb | 800 | sta_info_flush(sdata); |
0d466b9c | 801 | mesh_path_flush_by_iface(sdata); |
09b17470 | 802 | |
3f52b7e3 MP |
803 | /* free all potentially still buffered group-addressed frames */ |
804 | local->total_ps_buffered -= skb_queue_len(&ifmsh->ps.bc_buf); | |
805 | skb_queue_purge(&ifmsh->ps.bc_buf); | |
806 | ||
472dbc45 | 807 | del_timer_sync(&sdata->u.mesh.housekeeping_timer); |
e304bfd3 | 808 | del_timer_sync(&sdata->u.mesh.mesh_path_root_timer); |
dd4c9260 | 809 | del_timer_sync(&sdata->u.mesh.mesh_path_timer); |
b7413430 JB |
810 | /* |
811 | * If the timer fired while we waited for it, it will have | |
812 | * requeued the work. Now the work will be running again | |
813 | * but will not rearm the timer again because it checks | |
814 | * whether the interface is running, which, at this point, | |
815 | * it no longer is. | |
816 | */ | |
64592c8f | 817 | cancel_work_sync(&sdata->work); |
09b17470 JB |
818 | |
819 | local->fif_other_bss--; | |
820 | atomic_dec(&local->iff_allmultis); | |
821 | ieee80211_configure_filter(local); | |
472dbc45 JB |
822 | } |
823 | ||
9fb04b50 TP |
824 | static void |
825 | ieee80211_mesh_rx_probe_req(struct ieee80211_sub_if_data *sdata, | |
826 | struct ieee80211_mgmt *mgmt, size_t len) | |
827 | { | |
828 | struct ieee80211_local *local = sdata->local; | |
829 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
830 | struct sk_buff *presp; | |
831 | struct beacon_data *bcn; | |
832 | struct ieee80211_mgmt *hdr; | |
833 | struct ieee802_11_elems elems; | |
834 | size_t baselen; | |
511044ea | 835 | u8 *pos; |
9fb04b50 | 836 | |
9fb04b50 TP |
837 | pos = mgmt->u.probe_req.variable; |
838 | baselen = (u8 *) pos - (u8 *) mgmt; | |
839 | if (baselen > len) | |
840 | return; | |
841 | ||
b2e506bf | 842 | ieee802_11_parse_elems(pos, len - baselen, false, &elems); |
9fb04b50 TP |
843 | |
844 | /* 802.11-2012 10.1.4.3.2 */ | |
845 | if ((!ether_addr_equal(mgmt->da, sdata->vif.addr) && | |
846 | !is_broadcast_ether_addr(mgmt->da)) || | |
847 | elems.ssid_len != 0) | |
848 | return; | |
849 | ||
850 | if (elems.mesh_id_len != 0 && | |
851 | (elems.mesh_id_len != ifmsh->mesh_id_len || | |
852 | memcmp(elems.mesh_id, ifmsh->mesh_id, ifmsh->mesh_id_len))) | |
853 | return; | |
854 | ||
855 | rcu_read_lock(); | |
856 | bcn = rcu_dereference(ifmsh->beacon); | |
857 | ||
858 | if (!bcn) | |
859 | goto out; | |
860 | ||
861 | presp = dev_alloc_skb(local->tx_headroom + | |
862 | bcn->head_len + bcn->tail_len); | |
863 | if (!presp) | |
864 | goto out; | |
865 | ||
866 | skb_reserve(presp, local->tx_headroom); | |
867 | memcpy(skb_put(presp, bcn->head_len), bcn->head, bcn->head_len); | |
868 | memcpy(skb_put(presp, bcn->tail_len), bcn->tail, bcn->tail_len); | |
869 | hdr = (struct ieee80211_mgmt *) presp->data; | |
870 | hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
871 | IEEE80211_STYPE_PROBE_RESP); | |
872 | memcpy(hdr->da, mgmt->sa, ETH_ALEN); | |
9fb04b50 TP |
873 | IEEE80211_SKB_CB(presp)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
874 | ieee80211_tx_skb(sdata, presp); | |
875 | out: | |
876 | rcu_read_unlock(); | |
877 | } | |
878 | ||
472dbc45 JB |
879 | static void ieee80211_mesh_rx_bcn_presp(struct ieee80211_sub_if_data *sdata, |
880 | u16 stype, | |
881 | struct ieee80211_mgmt *mgmt, | |
882 | size_t len, | |
883 | struct ieee80211_rx_status *rx_status) | |
884 | { | |
c6a1fa12 | 885 | struct ieee80211_local *local = sdata->local; |
dbf498fb | 886 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
472dbc45 JB |
887 | struct ieee802_11_elems elems; |
888 | struct ieee80211_channel *channel; | |
472dbc45 JB |
889 | size_t baselen; |
890 | int freq; | |
891 | enum ieee80211_band band = rx_status->band; | |
892 | ||
893 | /* ignore ProbeResp to foreign address */ | |
894 | if (stype == IEEE80211_STYPE_PROBE_RESP && | |
b203ca39 | 895 | !ether_addr_equal(mgmt->da, sdata->vif.addr)) |
472dbc45 JB |
896 | return; |
897 | ||
898 | baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; | |
899 | if (baselen > len) | |
900 | return; | |
901 | ||
902 | ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, | |
b2e506bf | 903 | false, &elems); |
472dbc45 | 904 | |
9a90bc81 TP |
905 | /* ignore non-mesh or secure / unsecure mismatch */ |
906 | if ((!elems.mesh_id || !elems.mesh_config) || | |
907 | (elems.rsn && sdata->u.mesh.security == IEEE80211_MESH_SEC_NONE) || | |
908 | (!elems.rsn && sdata->u.mesh.security != IEEE80211_MESH_SEC_NONE)) | |
5cff5e01 JC |
909 | return; |
910 | ||
1cd8e88e | 911 | if (elems.ds_params) |
59eb21a6 | 912 | freq = ieee80211_channel_to_frequency(elems.ds_params[0], band); |
472dbc45 JB |
913 | else |
914 | freq = rx_status->freq; | |
915 | ||
916 | channel = ieee80211_get_channel(local->hw.wiphy, freq); | |
917 | ||
918 | if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) | |
919 | return; | |
920 | ||
9a90bc81 | 921 | if (mesh_matches_local(sdata, &elems)) |
f743ff49 | 922 | mesh_neighbour_update(sdata, mgmt->sa, &elems); |
dbf498fb JC |
923 | |
924 | if (ifmsh->sync_ops) | |
925 | ifmsh->sync_ops->rx_bcn_presp(sdata, | |
926 | stype, mgmt, &elems, rx_status); | |
472dbc45 JB |
927 | } |
928 | ||
929 | static void ieee80211_mesh_rx_mgmt_action(struct ieee80211_sub_if_data *sdata, | |
930 | struct ieee80211_mgmt *mgmt, | |
931 | size_t len, | |
932 | struct ieee80211_rx_status *rx_status) | |
933 | { | |
934 | switch (mgmt->u.action.category) { | |
8db09850 TP |
935 | case WLAN_CATEGORY_SELF_PROTECTED: |
936 | switch (mgmt->u.action.u.self_prot.action_code) { | |
937 | case WLAN_SP_MESH_PEERING_OPEN: | |
938 | case WLAN_SP_MESH_PEERING_CLOSE: | |
939 | case WLAN_SP_MESH_PEERING_CONFIRM: | |
940 | mesh_rx_plink_frame(sdata, mgmt, len, rx_status); | |
941 | break; | |
942 | } | |
472dbc45 | 943 | break; |
25d49e4d TP |
944 | case WLAN_CATEGORY_MESH_ACTION: |
945 | if (mesh_action_is_path_sel(mgmt)) | |
946 | mesh_rx_path_sel_frame(sdata, mgmt, len); | |
472dbc45 JB |
947 | break; |
948 | } | |
949 | } | |
950 | ||
1fa57d01 JB |
951 | void ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, |
952 | struct sk_buff *skb) | |
472dbc45 JB |
953 | { |
954 | struct ieee80211_rx_status *rx_status; | |
472dbc45 JB |
955 | struct ieee80211_mgmt *mgmt; |
956 | u16 stype; | |
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 | } | |
472dbc45 JB |
975 | } |
976 | ||
1fa57d01 | 977 | void ieee80211_mesh_work(struct ieee80211_sub_if_data *sdata) |
472dbc45 | 978 | { |
472dbc45 | 979 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
472dbc45 JB |
980 | |
981 | if (ifmsh->preq_queue_len && | |
982 | time_after(jiffies, | |
983 | ifmsh->last_preq + msecs_to_jiffies(ifmsh->mshcfg.dot11MeshHWMPpreqMinInterval))) | |
984 | mesh_path_start_discovery(sdata); | |
985 | ||
18889231 JC |
986 | if (test_and_clear_bit(MESH_WORK_GROW_MPATH_TABLE, &ifmsh->wrkq_flags)) |
987 | mesh_mpath_table_grow(); | |
988 | ||
dcac908b | 989 | if (test_and_clear_bit(MESH_WORK_GROW_MPP_TABLE, &ifmsh->wrkq_flags)) |
18889231 JC |
990 | mesh_mpp_table_grow(); |
991 | ||
992 | if (test_and_clear_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags)) | |
bf7cd94d | 993 | ieee80211_mesh_housekeeping(sdata); |
e304bfd3 RP |
994 | |
995 | if (test_and_clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags)) | |
996 | ieee80211_mesh_rootpath(sdata); | |
dbf498fb JC |
997 | |
998 | if (test_and_clear_bit(MESH_WORK_DRIFT_ADJUST, &ifmsh->wrkq_flags)) | |
999 | mesh_sync_adjust_tbtt(sdata); | |
472dbc45 JB |
1000 | } |
1001 | ||
1002 | void ieee80211_mesh_notify_scan_completed(struct ieee80211_local *local) | |
1003 | { | |
1004 | struct ieee80211_sub_if_data *sdata; | |
1005 | ||
1006 | rcu_read_lock(); | |
1007 | list_for_each_entry_rcu(sdata, &local->interfaces, list) | |
370bd005 BG |
1008 | if (ieee80211_vif_is_mesh(&sdata->vif) && |
1009 | ieee80211_sdata_running(sdata)) | |
64592c8f | 1010 | ieee80211_queue_work(&local->hw, &sdata->work); |
472dbc45 JB |
1011 | rcu_read_unlock(); |
1012 | } | |
1013 | ||
902acc78 JB |
1014 | void ieee80211_mesh_init_sdata(struct ieee80211_sub_if_data *sdata) |
1015 | { | |
472dbc45 | 1016 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
ad2d223a | 1017 | static u8 zero_addr[ETH_ALEN] = {}; |
472dbc45 | 1018 | |
472dbc45 JB |
1019 | setup_timer(&ifmsh->housekeeping_timer, |
1020 | ieee80211_mesh_housekeeping_timer, | |
1021 | (unsigned long) sdata); | |
472dbc45 | 1022 | |
472dbc45 JB |
1023 | ifmsh->accepting_plinks = true; |
1024 | ifmsh->preq_id = 0; | |
d19b3bf6 | 1025 | ifmsh->sn = 0; |
5ee68e5b | 1026 | ifmsh->num_gates = 0; |
472dbc45 | 1027 | atomic_set(&ifmsh->mpaths, 0); |
f698d856 | 1028 | mesh_rmc_init(sdata); |
472dbc45 | 1029 | ifmsh->last_preq = jiffies; |
dca7e943 | 1030 | ifmsh->next_perr = jiffies; |
902acc78 JB |
1031 | /* Allocate all mesh structures when creating the first mesh interface. */ |
1032 | if (!mesh_allocated) | |
1033 | ieee80211s_init(); | |
472dbc45 | 1034 | setup_timer(&ifmsh->mesh_path_timer, |
902acc78 JB |
1035 | ieee80211_mesh_path_timer, |
1036 | (unsigned long) sdata); | |
e304bfd3 RP |
1037 | setup_timer(&ifmsh->mesh_path_root_timer, |
1038 | ieee80211_mesh_path_root_timer, | |
1039 | (unsigned long) sdata); | |
472dbc45 | 1040 | INIT_LIST_HEAD(&ifmsh->preq_queue.list); |
3f52b7e3 | 1041 | skb_queue_head_init(&ifmsh->ps.bc_buf); |
472dbc45 | 1042 | spin_lock_init(&ifmsh->mesh_preq_queue_lock); |
dbf498fb | 1043 | spin_lock_init(&ifmsh->sync_offset_lock); |
2b5e1967 | 1044 | RCU_INIT_POINTER(ifmsh->beacon, NULL); |
ad2d223a JB |
1045 | |
1046 | sdata->vif.bss_conf.bssid = zero_addr; | |
472dbc45 | 1047 | } |