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 | ||
5bb644a0 JB |
16 | #define TMR_RUNNING_HK 0 |
17 | #define TMR_RUNNING_MP 1 | |
e304bfd3 | 18 | #define TMR_RUNNING_MPR 2 |
5bb644a0 | 19 | |
2e3c8736 LCC |
20 | int mesh_allocated; |
21 | static struct kmem_cache *rm_cache; | |
22 | ||
25d49e4d TP |
23 | bool mesh_action_is_path_sel(struct ieee80211_mgmt *mgmt) |
24 | { | |
25 | return (mgmt->u.action.u.mesh_action.action_code == | |
26 | WLAN_MESH_ACTION_HWMP_PATH_SELECTION); | |
27 | } | |
25d49e4d | 28 | |
2e3c8736 LCC |
29 | void ieee80211s_init(void) |
30 | { | |
31 | mesh_pathtbl_init(); | |
32 | mesh_allocated = 1; | |
33 | rm_cache = kmem_cache_create("mesh_rmc", sizeof(struct rmc_entry), | |
34 | 0, 0, NULL); | |
35 | } | |
36 | ||
37 | void ieee80211s_stop(void) | |
38 | { | |
39 | mesh_pathtbl_unregister(); | |
40 | kmem_cache_destroy(rm_cache); | |
41 | } | |
42 | ||
472dbc45 JB |
43 | static void ieee80211_mesh_housekeeping_timer(unsigned long data) |
44 | { | |
45 | struct ieee80211_sub_if_data *sdata = (void *) data; | |
46 | struct ieee80211_local *local = sdata->local; | |
47 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
48 | ||
6b9ac442 | 49 | set_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags); |
5bb644a0 JB |
50 | |
51 | if (local->quiescing) { | |
52 | set_bit(TMR_RUNNING_HK, &ifmsh->timers_running); | |
53 | return; | |
54 | } | |
55 | ||
64592c8f | 56 | ieee80211_queue_work(&local->hw, &sdata->work); |
472dbc45 JB |
57 | } |
58 | ||
2e3c8736 LCC |
59 | /** |
60 | * mesh_matches_local - check if the config of a mesh point matches ours | |
61 | * | |
f698d856 | 62 | * @sdata: local mesh subif |
f743ff49 | 63 | * @ie: information elements of a management frame from the mesh peer |
2e3c8736 LCC |
64 | * |
65 | * This function checks if the mesh configuration of a mesh point matches the | |
66 | * local mesh configuration, i.e. if both nodes belong to the same mesh network. | |
67 | */ | |
f743ff49 TP |
68 | bool mesh_matches_local(struct ieee80211_sub_if_data *sdata, |
69 | struct ieee802_11_elems *ie) | |
2e3c8736 | 70 | { |
472dbc45 | 71 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
739522ba | 72 | struct ieee80211_local *local = sdata->local; |
f743ff49 | 73 | u32 basic_rates = 0; |
4bf88530 | 74 | struct cfg80211_chan_def sta_chan_def; |
2e3c8736 | 75 | |
2e3c8736 LCC |
76 | /* |
77 | * As support for each feature is added, check for matching | |
78 | * - On mesh config capabilities | |
79 | * - Power Save Support En | |
80 | * - Sync support enabled | |
81 | * - Sync support active | |
82 | * - Sync support required from peer | |
83 | * - MDA enabled | |
84 | * - Power management control on fc | |
85 | */ | |
739522ba TP |
86 | if (!(ifmsh->mesh_id_len == ie->mesh_id_len && |
87 | memcmp(ifmsh->mesh_id, ie->mesh_id, ie->mesh_id_len) == 0 && | |
88 | (ifmsh->mesh_pp_id == ie->mesh_config->meshconf_psel) && | |
89 | (ifmsh->mesh_pm_id == ie->mesh_config->meshconf_pmetric) && | |
90 | (ifmsh->mesh_cc_id == ie->mesh_config->meshconf_congest) && | |
91 | (ifmsh->mesh_sp_id == ie->mesh_config->meshconf_synch) && | |
92 | (ifmsh->mesh_auth_id == ie->mesh_config->meshconf_auth))) | |
93 | goto mismatch; | |
94 | ||
55de908a | 95 | ieee80211_sta_get_rates(local, ie, ieee80211_get_sdata_band(sdata), |
f743ff49 TP |
96 | &basic_rates); |
97 | ||
fe40cb62 AN |
98 | if (sdata->vif.bss_conf.basic_rates != basic_rates) |
99 | goto mismatch; | |
100 | ||
4bf88530 JB |
101 | ieee80211_ht_oper_to_chandef(sdata->vif.bss_conf.chandef.chan, |
102 | ie->ht_operation, &sta_chan_def); | |
103 | ||
104 | if (!cfg80211_chandef_compatible(&sdata->vif.bss_conf.chandef, | |
105 | &sta_chan_def)) | |
739522ba | 106 | goto mismatch; |
2e3c8736 | 107 | |
739522ba TP |
108 | return true; |
109 | mismatch: | |
2e3c8736 LCC |
110 | return false; |
111 | } | |
112 | ||
113 | /** | |
114 | * mesh_peer_accepts_plinks - check if an mp is willing to establish peer links | |
115 | * | |
116 | * @ie: information elements of a management frame from the mesh peer | |
2e3c8736 | 117 | */ |
f698d856 | 118 | bool mesh_peer_accepts_plinks(struct ieee802_11_elems *ie) |
2e3c8736 | 119 | { |
136cfa28 | 120 | return (ie->mesh_config->meshconf_cap & |
65821635 | 121 | IEEE80211_MESHCONF_CAPAB_ACCEPT_PLINKS) != 0; |
2e3c8736 LCC |
122 | } |
123 | ||
124 | /** | |
2c53040f | 125 | * mesh_accept_plinks_update - update accepting_plink in local mesh beacons |
2e3c8736 | 126 | * |
d0709a65 | 127 | * @sdata: mesh interface in which mesh beacons are going to be updated |
df323818 MP |
128 | * |
129 | * Returns: beacon changed flag if the beacon content changed. | |
2e3c8736 | 130 | */ |
df323818 | 131 | u32 mesh_accept_plinks_update(struct ieee80211_sub_if_data *sdata) |
2e3c8736 | 132 | { |
2e3c8736 | 133 | bool free_plinks; |
df323818 | 134 | u32 changed = 0; |
2e3c8736 LCC |
135 | |
136 | /* In case mesh_plink_free_count > 0 and mesh_plinktbl_capacity == 0, | |
137 | * the mesh interface might be able to establish plinks with peers that | |
b4e08ea1 LCC |
138 | * are already on the table but are not on PLINK_ESTAB state. However, |
139 | * in general the mesh interface is not accepting peer link requests | |
140 | * from new peers, and that must be reflected in the beacon | |
2e3c8736 LCC |
141 | */ |
142 | free_plinks = mesh_plink_availables(sdata); | |
143 | ||
df323818 MP |
144 | if (free_plinks != sdata->u.mesh.accepting_plinks) { |
145 | sdata->u.mesh.accepting_plinks = free_plinks; | |
146 | changed = BSS_CHANGED_BEACON; | |
147 | } | |
148 | ||
149 | return changed; | |
2e3c8736 LCC |
150 | } |
151 | ||
45b5028e TP |
152 | /* |
153 | * mesh_sta_cleanup - clean up any mesh sta state | |
154 | * | |
155 | * @sta: mesh sta to clean up. | |
156 | */ | |
157 | void mesh_sta_cleanup(struct sta_info *sta) | |
158 | { | |
159 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
160 | u32 changed; | |
161 | ||
162 | /* | |
163 | * maybe userspace handles peer allocation and peering, but in either | |
164 | * case the beacon is still generated by the kernel and we might need | |
165 | * an update. | |
166 | */ | |
167 | changed = mesh_accept_plinks_update(sdata); | |
168 | if (sdata->u.mesh.security == IEEE80211_MESH_SEC_NONE) { | |
169 | changed |= mesh_plink_deactivate(sta); | |
170 | del_timer_sync(&sta->plink_timer); | |
171 | } | |
172 | ||
173 | if (changed) | |
2b5e1967 | 174 | ieee80211_mbss_info_change_notify(sdata, changed); |
45b5028e TP |
175 | } |
176 | ||
f698d856 | 177 | int mesh_rmc_init(struct ieee80211_sub_if_data *sdata) |
2e3c8736 | 178 | { |
2e3c8736 LCC |
179 | int i; |
180 | ||
472dbc45 JB |
181 | sdata->u.mesh.rmc = kmalloc(sizeof(struct mesh_rmc), GFP_KERNEL); |
182 | if (!sdata->u.mesh.rmc) | |
2e3c8736 | 183 | return -ENOMEM; |
472dbc45 | 184 | sdata->u.mesh.rmc->idx_mask = RMC_BUCKETS - 1; |
2e3c8736 | 185 | for (i = 0; i < RMC_BUCKETS; i++) |
b7cfcd11 | 186 | INIT_LIST_HEAD(&sdata->u.mesh.rmc->bucket[i]); |
2e3c8736 LCC |
187 | return 0; |
188 | } | |
189 | ||
f698d856 | 190 | void mesh_rmc_free(struct ieee80211_sub_if_data *sdata) |
2e3c8736 | 191 | { |
472dbc45 | 192 | struct mesh_rmc *rmc = sdata->u.mesh.rmc; |
2e3c8736 LCC |
193 | struct rmc_entry *p, *n; |
194 | int i; | |
195 | ||
472dbc45 | 196 | if (!sdata->u.mesh.rmc) |
2e3c8736 LCC |
197 | return; |
198 | ||
199 | for (i = 0; i < RMC_BUCKETS; i++) | |
b7cfcd11 | 200 | list_for_each_entry_safe(p, n, &rmc->bucket[i], list) { |
2e3c8736 LCC |
201 | list_del(&p->list); |
202 | kmem_cache_free(rm_cache, p); | |
203 | } | |
204 | ||
205 | kfree(rmc); | |
472dbc45 | 206 | sdata->u.mesh.rmc = NULL; |
2e3c8736 LCC |
207 | } |
208 | ||
209 | /** | |
210 | * mesh_rmc_check - Check frame in recent multicast cache and add if absent. | |
211 | * | |
212 | * @sa: source address | |
213 | * @mesh_hdr: mesh_header | |
214 | * | |
215 | * Returns: 0 if the frame is not in the cache, nonzero otherwise. | |
216 | * | |
217 | * Checks using the source address and the mesh sequence number if we have | |
218 | * received this frame lately. If the frame is not in the cache, it is added to | |
219 | * it. | |
220 | */ | |
221 | int mesh_rmc_check(u8 *sa, struct ieee80211s_hdr *mesh_hdr, | |
f698d856 | 222 | struct ieee80211_sub_if_data *sdata) |
2e3c8736 | 223 | { |
472dbc45 | 224 | struct mesh_rmc *rmc = sdata->u.mesh.rmc; |
2e3c8736 LCC |
225 | u32 seqnum = 0; |
226 | int entries = 0; | |
227 | u8 idx; | |
228 | struct rmc_entry *p, *n; | |
229 | ||
230 | /* Don't care about endianness since only match matters */ | |
51ceddad LCC |
231 | memcpy(&seqnum, &mesh_hdr->seqnum, sizeof(mesh_hdr->seqnum)); |
232 | idx = le32_to_cpu(mesh_hdr->seqnum) & rmc->idx_mask; | |
b7cfcd11 | 233 | list_for_each_entry_safe(p, n, &rmc->bucket[idx], list) { |
2e3c8736 LCC |
234 | ++entries; |
235 | if (time_after(jiffies, p->exp_time) || | |
236 | (entries == RMC_QUEUE_MAX_LEN)) { | |
237 | list_del(&p->list); | |
238 | kmem_cache_free(rm_cache, p); | |
239 | --entries; | |
f64f9e71 | 240 | } else if ((seqnum == p->seqnum) && |
b203ca39 | 241 | (ether_addr_equal(sa, p->sa))) |
2e3c8736 LCC |
242 | return -1; |
243 | } | |
244 | ||
245 | p = kmem_cache_alloc(rm_cache, GFP_ATOMIC); | |
d15b8459 | 246 | if (!p) |
2e3c8736 | 247 | return 0; |
d15b8459 | 248 | |
2e3c8736 LCC |
249 | p->seqnum = seqnum; |
250 | p->exp_time = jiffies + RMC_TIMEOUT; | |
251 | memcpy(p->sa, sa, ETH_ALEN); | |
b7cfcd11 | 252 | list_add(&p->list, &rmc->bucket[idx]); |
2e3c8736 LCC |
253 | return 0; |
254 | } | |
255 | ||
082ebb0c TP |
256 | int |
257 | mesh_add_meshconf_ie(struct sk_buff *skb, struct ieee80211_sub_if_data *sdata) | |
258 | { | |
259 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
260 | u8 *pos, neighbors; | |
261 | u8 meshconf_len = sizeof(struct ieee80211_meshconf_ie); | |
262 | ||
263 | if (skb_tailroom(skb) < 2 + meshconf_len) | |
264 | return -ENOMEM; | |
265 | ||
266 | pos = skb_put(skb, 2 + meshconf_len); | |
267 | *pos++ = WLAN_EID_MESH_CONFIG; | |
268 | *pos++ = meshconf_len; | |
269 | ||
270 | /* Active path selection protocol ID */ | |
271 | *pos++ = ifmsh->mesh_pp_id; | |
272 | /* Active path selection metric ID */ | |
273 | *pos++ = ifmsh->mesh_pm_id; | |
274 | /* Congestion control mode identifier */ | |
275 | *pos++ = ifmsh->mesh_cc_id; | |
276 | /* Synchronization protocol identifier */ | |
277 | *pos++ = ifmsh->mesh_sp_id; | |
278 | /* Authentication Protocol identifier */ | |
279 | *pos++ = ifmsh->mesh_auth_id; | |
280 | /* Mesh Formation Info - number of neighbors */ | |
1258d976 | 281 | neighbors = atomic_read(&ifmsh->estab_plinks); |
082ebb0c TP |
282 | /* Number of neighbor mesh STAs or 15 whichever is smaller */ |
283 | neighbors = (neighbors > 15) ? 15 : neighbors; | |
284 | *pos++ = neighbors << 1; | |
285 | /* Mesh capability */ | |
65821635 | 286 | *pos = IEEE80211_MESHCONF_CAPAB_FORWARDING; |
dbf498fb | 287 | *pos |= ifmsh->accepting_plinks ? |
65821635 | 288 | IEEE80211_MESHCONF_CAPAB_ACCEPT_PLINKS : 0x00; |
3f52b7e3 MP |
289 | /* Mesh PS mode. See IEEE802.11-2012 8.4.2.100.8 */ |
290 | *pos |= ifmsh->ps_peers_deep_sleep ? | |
291 | IEEE80211_MESHCONF_CAPAB_POWER_SAVE_LEVEL : 0x00; | |
dbf498fb | 292 | *pos++ |= ifmsh->adjusting_tbtt ? |
65821635 | 293 | IEEE80211_MESHCONF_CAPAB_TBTT_ADJUSTING : 0x00; |
082ebb0c TP |
294 | *pos++ = 0x00; |
295 | ||
296 | return 0; | |
297 | } | |
298 | ||
299 | int | |
300 | mesh_add_meshid_ie(struct sk_buff *skb, struct ieee80211_sub_if_data *sdata) | |
301 | { | |
302 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
303 | u8 *pos; | |
304 | ||
305 | if (skb_tailroom(skb) < 2 + ifmsh->mesh_id_len) | |
306 | return -ENOMEM; | |
307 | ||
308 | pos = skb_put(skb, 2 + ifmsh->mesh_id_len); | |
309 | *pos++ = WLAN_EID_MESH_ID; | |
310 | *pos++ = ifmsh->mesh_id_len; | |
311 | if (ifmsh->mesh_id_len) | |
312 | memcpy(pos, ifmsh->mesh_id, ifmsh->mesh_id_len); | |
313 | ||
314 | return 0; | |
315 | } | |
316 | ||
3f52b7e3 MP |
317 | int mesh_add_awake_window_ie(struct sk_buff *skb, |
318 | struct ieee80211_sub_if_data *sdata) | |
319 | { | |
320 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
321 | u8 *pos; | |
322 | ||
323 | /* see IEEE802.11-2012 13.14.6 */ | |
324 | if (ifmsh->ps_peers_light_sleep == 0 && | |
325 | ifmsh->ps_peers_deep_sleep == 0 && | |
326 | ifmsh->nonpeer_pm == NL80211_MESH_POWER_ACTIVE) | |
327 | return 0; | |
328 | ||
329 | if (skb_tailroom(skb) < 4) | |
330 | return -ENOMEM; | |
331 | ||
332 | pos = skb_put(skb, 2 + 2); | |
333 | *pos++ = WLAN_EID_MESH_AWAKE_WINDOW; | |
334 | *pos++ = 2; | |
335 | put_unaligned_le16(ifmsh->mshcfg.dot11MeshAwakeWindowDuration, pos); | |
336 | ||
337 | return 0; | |
338 | } | |
339 | ||
082ebb0c TP |
340 | int |
341 | mesh_add_vendor_ies(struct sk_buff *skb, struct ieee80211_sub_if_data *sdata) | |
342 | { | |
343 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
344 | u8 offset, len; | |
345 | const u8 *data; | |
346 | ||
347 | if (!ifmsh->ie || !ifmsh->ie_len) | |
348 | return 0; | |
349 | ||
350 | /* fast-forward to vendor IEs */ | |
351 | offset = ieee80211_ie_split_vendor(ifmsh->ie, ifmsh->ie_len, 0); | |
352 | ||
353 | if (offset) { | |
354 | len = ifmsh->ie_len - offset; | |
355 | data = ifmsh->ie + offset; | |
356 | if (skb_tailroom(skb) < len) | |
357 | return -ENOMEM; | |
358 | memcpy(skb_put(skb, len), data, len); | |
359 | } | |
360 | ||
361 | return 0; | |
362 | } | |
363 | ||
364 | int | |
365 | mesh_add_rsn_ie(struct sk_buff *skb, struct ieee80211_sub_if_data *sdata) | |
366 | { | |
367 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
368 | u8 len = 0; | |
369 | const u8 *data; | |
370 | ||
371 | if (!ifmsh->ie || !ifmsh->ie_len) | |
372 | return 0; | |
373 | ||
374 | /* find RSN IE */ | |
375 | data = ifmsh->ie; | |
376 | while (data < ifmsh->ie + ifmsh->ie_len) { | |
377 | if (*data == WLAN_EID_RSN) { | |
378 | len = data[1] + 2; | |
379 | break; | |
380 | } | |
381 | data++; | |
382 | } | |
383 | ||
384 | if (len) { | |
385 | if (skb_tailroom(skb) < len) | |
386 | return -ENOMEM; | |
387 | memcpy(skb_put(skb, len), data, len); | |
388 | } | |
389 | ||
390 | return 0; | |
391 | } | |
392 | ||
082ebb0c TP |
393 | int mesh_add_ds_params_ie(struct sk_buff *skb, |
394 | struct ieee80211_sub_if_data *sdata) | |
395 | { | |
55de908a JB |
396 | struct ieee80211_chanctx_conf *chanctx_conf; |
397 | struct ieee80211_channel *chan; | |
082ebb0c | 398 | u8 *pos; |
2e3c8736 | 399 | |
082ebb0c TP |
400 | if (skb_tailroom(skb) < 3) |
401 | return -ENOMEM; | |
402 | ||
55de908a JB |
403 | rcu_read_lock(); |
404 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
405 | if (WARN_ON(!chanctx_conf)) { | |
406 | rcu_read_unlock(); | |
407 | return -EINVAL; | |
408 | } | |
4bf88530 | 409 | chan = chanctx_conf->def.chan; |
55de908a JB |
410 | rcu_read_unlock(); |
411 | ||
601513aa ET |
412 | pos = skb_put(skb, 2 + 1); |
413 | *pos++ = WLAN_EID_DS_PARAMS; | |
414 | *pos++ = 1; | |
415 | *pos++ = ieee80211_frequency_to_channel(chan->center_freq); | |
be125c60 | 416 | |
082ebb0c | 417 | return 0; |
2e3c8736 LCC |
418 | } |
419 | ||
176f3608 TP |
420 | int mesh_add_ht_cap_ie(struct sk_buff *skb, |
421 | struct ieee80211_sub_if_data *sdata) | |
422 | { | |
423 | struct ieee80211_local *local = sdata->local; | |
55de908a | 424 | enum ieee80211_band band = ieee80211_get_sdata_band(sdata); |
176f3608 TP |
425 | struct ieee80211_supported_band *sband; |
426 | u8 *pos; | |
427 | ||
55de908a | 428 | sband = local->hw.wiphy->bands[band]; |
176f3608 | 429 | if (!sband->ht_cap.ht_supported || |
4bf88530 | 430 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT) |
176f3608 TP |
431 | return 0; |
432 | ||
433 | if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_ht_cap)) | |
434 | return -ENOMEM; | |
435 | ||
436 | pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_cap)); | |
ef96a842 | 437 | ieee80211_ie_build_ht_cap(pos, &sband->ht_cap, sband->ht_cap.cap); |
176f3608 TP |
438 | |
439 | return 0; | |
440 | } | |
441 | ||
074d46d1 | 442 | int mesh_add_ht_oper_ie(struct sk_buff *skb, |
176f3608 TP |
443 | struct ieee80211_sub_if_data *sdata) |
444 | { | |
445 | struct ieee80211_local *local = sdata->local; | |
55de908a JB |
446 | struct ieee80211_chanctx_conf *chanctx_conf; |
447 | struct ieee80211_channel *channel; | |
466f310d | 448 | enum nl80211_channel_type channel_type = |
4bf88530 | 449 | cfg80211_get_chandef_type(&sdata->vif.bss_conf.chandef); |
55de908a JB |
450 | struct ieee80211_supported_band *sband; |
451 | struct ieee80211_sta_ht_cap *ht_cap; | |
176f3608 TP |
452 | u8 *pos; |
453 | ||
55de908a JB |
454 | rcu_read_lock(); |
455 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
456 | if (WARN_ON(!chanctx_conf)) { | |
457 | rcu_read_unlock(); | |
458 | return -EINVAL; | |
459 | } | |
4bf88530 | 460 | channel = chanctx_conf->def.chan; |
55de908a JB |
461 | rcu_read_unlock(); |
462 | ||
463 | sband = local->hw.wiphy->bands[channel->band]; | |
464 | ht_cap = &sband->ht_cap; | |
465 | ||
176f3608 TP |
466 | if (!ht_cap->ht_supported || channel_type == NL80211_CHAN_NO_HT) |
467 | return 0; | |
468 | ||
074d46d1 | 469 | if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_ht_operation)) |
176f3608 TP |
470 | return -ENOMEM; |
471 | ||
074d46d1 | 472 | pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_operation)); |
4bf88530 | 473 | ieee80211_ie_build_ht_oper(pos, ht_cap, &sdata->vif.bss_conf.chandef, |
431e3154 | 474 | sdata->vif.bss_conf.ht_operation_mode); |
176f3608 TP |
475 | |
476 | return 0; | |
477 | } | |
2e3c8736 LCC |
478 | static void ieee80211_mesh_path_timer(unsigned long data) |
479 | { | |
480 | struct ieee80211_sub_if_data *sdata = | |
481 | (struct ieee80211_sub_if_data *) data; | |
472dbc45 | 482 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
133b8226 | 483 | struct ieee80211_local *local = sdata->local; |
2e3c8736 | 484 | |
5bb644a0 JB |
485 | if (local->quiescing) { |
486 | set_bit(TMR_RUNNING_MP, &ifmsh->timers_running); | |
487 | return; | |
488 | } | |
489 | ||
64592c8f | 490 | ieee80211_queue_work(&local->hw, &sdata->work); |
2e3c8736 LCC |
491 | } |
492 | ||
e304bfd3 RP |
493 | static void ieee80211_mesh_path_root_timer(unsigned long data) |
494 | { | |
495 | struct ieee80211_sub_if_data *sdata = | |
496 | (struct ieee80211_sub_if_data *) data; | |
497 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
498 | struct ieee80211_local *local = sdata->local; | |
499 | ||
500 | set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); | |
501 | ||
502 | if (local->quiescing) { | |
503 | set_bit(TMR_RUNNING_MPR, &ifmsh->timers_running); | |
504 | return; | |
505 | } | |
506 | ||
64592c8f | 507 | ieee80211_queue_work(&local->hw, &sdata->work); |
e304bfd3 RP |
508 | } |
509 | ||
63c5723b RP |
510 | void ieee80211_mesh_root_setup(struct ieee80211_if_mesh *ifmsh) |
511 | { | |
dbb912cd | 512 | if (ifmsh->mshcfg.dot11MeshHWMPRootMode > IEEE80211_ROOTMODE_ROOT) |
63c5723b RP |
513 | set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); |
514 | else { | |
515 | clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); | |
516 | /* stop running timer */ | |
517 | del_timer_sync(&ifmsh->mesh_path_root_timer); | |
518 | } | |
519 | } | |
520 | ||
3c5772a5 JC |
521 | /** |
522 | * ieee80211_fill_mesh_addresses - fill addresses of a locally originated mesh frame | |
523 | * @hdr: 802.11 frame header | |
524 | * @fc: frame control field | |
525 | * @meshda: destination address in the mesh | |
526 | * @meshsa: source address address in the mesh. Same as TA, as frame is | |
527 | * locally originated. | |
528 | * | |
529 | * Return the length of the 802.11 (does not include a mesh control header) | |
530 | */ | |
15ff6365 JB |
531 | int ieee80211_fill_mesh_addresses(struct ieee80211_hdr *hdr, __le16 *fc, |
532 | const u8 *meshda, const u8 *meshsa) | |
533 | { | |
3c5772a5 JC |
534 | if (is_multicast_ether_addr(meshda)) { |
535 | *fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS); | |
536 | /* DA TA SA */ | |
537 | memcpy(hdr->addr1, meshda, ETH_ALEN); | |
538 | memcpy(hdr->addr2, meshsa, ETH_ALEN); | |
539 | memcpy(hdr->addr3, meshsa, ETH_ALEN); | |
540 | return 24; | |
541 | } else { | |
2154c81c | 542 | *fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); |
3c5772a5 JC |
543 | /* RA TA DA SA */ |
544 | memset(hdr->addr1, 0, ETH_ALEN); /* RA is resolved later */ | |
545 | memcpy(hdr->addr2, meshsa, ETH_ALEN); | |
546 | memcpy(hdr->addr3, meshda, ETH_ALEN); | |
547 | memcpy(hdr->addr4, meshsa, ETH_ALEN); | |
548 | return 30; | |
549 | } | |
550 | } | |
551 | ||
902acc78 JB |
552 | /** |
553 | * ieee80211_new_mesh_header - create a new mesh header | |
554 | * @meshhdr: uninitialized mesh header | |
555 | * @sdata: mesh interface to be used | |
61ad5394 JC |
556 | * @addr4or5: 1st address in the ae header, which may correspond to address 4 |
557 | * (if addr6 is NULL) or address 5 (if addr6 is present). It may | |
558 | * be NULL. | |
559 | * @addr6: 2nd address in the ae header, which corresponds to addr6 of the | |
560 | * mesh frame | |
902acc78 JB |
561 | * |
562 | * Return the header length. | |
563 | */ | |
564 | int ieee80211_new_mesh_header(struct ieee80211s_hdr *meshhdr, | |
61ad5394 JC |
565 | struct ieee80211_sub_if_data *sdata, char *addr4or5, |
566 | char *addr6) | |
902acc78 | 567 | { |
3c5772a5 | 568 | int aelen = 0; |
61ad5394 | 569 | BUG_ON(!addr4or5 && addr6); |
0c3cee72 | 570 | memset(meshhdr, 0, sizeof(*meshhdr)); |
472dbc45 JB |
571 | meshhdr->ttl = sdata->u.mesh.mshcfg.dot11MeshTTL; |
572 | put_unaligned(cpu_to_le32(sdata->u.mesh.mesh_seqnum), &meshhdr->seqnum); | |
573 | sdata->u.mesh.mesh_seqnum++; | |
61ad5394 | 574 | if (addr4or5 && !addr6) { |
3c5772a5 JC |
575 | meshhdr->flags |= MESH_FLAGS_AE_A4; |
576 | aelen += ETH_ALEN; | |
61ad5394 JC |
577 | memcpy(meshhdr->eaddr1, addr4or5, ETH_ALEN); |
578 | } else if (addr4or5 && addr6) { | |
3c5772a5 JC |
579 | meshhdr->flags |= MESH_FLAGS_AE_A5_A6; |
580 | aelen += 2 * ETH_ALEN; | |
61ad5394 JC |
581 | memcpy(meshhdr->eaddr1, addr4or5, ETH_ALEN); |
582 | memcpy(meshhdr->eaddr2, addr6, ETH_ALEN); | |
3c5772a5 JC |
583 | } |
584 | return 6 + aelen; | |
902acc78 JB |
585 | } |
586 | ||
472dbc45 JB |
587 | static void ieee80211_mesh_housekeeping(struct ieee80211_sub_if_data *sdata, |
588 | struct ieee80211_if_mesh *ifmsh) | |
589 | { | |
df323818 | 590 | u32 changed; |
472dbc45 | 591 | |
472dbc45 JB |
592 | ieee80211_sta_expire(sdata, IEEE80211_MESH_PEER_INACTIVITY_LIMIT); |
593 | mesh_path_expire(sdata); | |
594 | ||
df323818 | 595 | changed = mesh_accept_plinks_update(sdata); |
2b5e1967 | 596 | ieee80211_mbss_info_change_notify(sdata, changed); |
472dbc45 | 597 | |
472dbc45 JB |
598 | mod_timer(&ifmsh->housekeeping_timer, |
599 | round_jiffies(jiffies + IEEE80211_MESH_HOUSEKEEPING_INTERVAL)); | |
600 | } | |
601 | ||
e304bfd3 RP |
602 | static void ieee80211_mesh_rootpath(struct ieee80211_sub_if_data *sdata) |
603 | { | |
604 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
a69cc44f | 605 | u32 interval; |
e304bfd3 RP |
606 | |
607 | mesh_path_tx_root_frame(sdata); | |
a69cc44f CYY |
608 | |
609 | if (ifmsh->mshcfg.dot11MeshHWMPRootMode == IEEE80211_PROACTIVE_RANN) | |
610 | interval = ifmsh->mshcfg.dot11MeshHWMPRannInterval; | |
611 | else | |
612 | interval = ifmsh->mshcfg.dot11MeshHWMProotInterval; | |
613 | ||
e304bfd3 | 614 | mod_timer(&ifmsh->mesh_path_root_timer, |
a69cc44f | 615 | round_jiffies(TU_TO_EXP_TIME(interval))); |
e304bfd3 RP |
616 | } |
617 | ||
5bb644a0 JB |
618 | #ifdef CONFIG_PM |
619 | void ieee80211_mesh_quiesce(struct ieee80211_sub_if_data *sdata) | |
620 | { | |
621 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
622 | ||
5ee68e5b | 623 | /* use atomic bitops in case all timers fire at the same time */ |
5bb644a0 JB |
624 | |
625 | if (del_timer_sync(&ifmsh->housekeeping_timer)) | |
626 | set_bit(TMR_RUNNING_HK, &ifmsh->timers_running); | |
627 | if (del_timer_sync(&ifmsh->mesh_path_timer)) | |
628 | set_bit(TMR_RUNNING_MP, &ifmsh->timers_running); | |
e304bfd3 RP |
629 | if (del_timer_sync(&ifmsh->mesh_path_root_timer)) |
630 | set_bit(TMR_RUNNING_MPR, &ifmsh->timers_running); | |
5bb644a0 JB |
631 | } |
632 | ||
633 | void ieee80211_mesh_restart(struct ieee80211_sub_if_data *sdata) | |
634 | { | |
635 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
636 | ||
637 | if (test_and_clear_bit(TMR_RUNNING_HK, &ifmsh->timers_running)) | |
638 | add_timer(&ifmsh->housekeeping_timer); | |
639 | if (test_and_clear_bit(TMR_RUNNING_MP, &ifmsh->timers_running)) | |
640 | add_timer(&ifmsh->mesh_path_timer); | |
e304bfd3 RP |
641 | if (test_and_clear_bit(TMR_RUNNING_MPR, &ifmsh->timers_running)) |
642 | add_timer(&ifmsh->mesh_path_root_timer); | |
63c5723b | 643 | ieee80211_mesh_root_setup(ifmsh); |
5bb644a0 JB |
644 | } |
645 | #endif | |
472dbc45 | 646 | |
2b5e1967 TP |
647 | static int |
648 | ieee80211_mesh_build_beacon(struct ieee80211_if_mesh *ifmsh) | |
649 | { | |
650 | struct beacon_data *bcn; | |
651 | int head_len, tail_len; | |
652 | struct sk_buff *skb; | |
653 | struct ieee80211_mgmt *mgmt; | |
654 | struct ieee80211_chanctx_conf *chanctx_conf; | |
655 | enum ieee80211_band band; | |
656 | u8 *pos; | |
657 | struct ieee80211_sub_if_data *sdata; | |
658 | int hdr_len = offsetof(struct ieee80211_mgmt, u.beacon) + | |
659 | sizeof(mgmt->u.beacon); | |
660 | ||
661 | sdata = container_of(ifmsh, struct ieee80211_sub_if_data, u.mesh); | |
662 | rcu_read_lock(); | |
663 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
664 | band = chanctx_conf->def.chan->band; | |
665 | rcu_read_unlock(); | |
666 | ||
667 | head_len = hdr_len + | |
668 | 2 + /* NULL SSID */ | |
669 | 2 + 8 + /* supported rates */ | |
670 | 2 + 3; /* DS params */ | |
671 | tail_len = 2 + (IEEE80211_MAX_SUPP_RATES - 8) + | |
672 | 2 + sizeof(struct ieee80211_ht_cap) + | |
673 | 2 + sizeof(struct ieee80211_ht_operation) + | |
674 | 2 + ifmsh->mesh_id_len + | |
675 | 2 + sizeof(struct ieee80211_meshconf_ie) + | |
676 | 2 + sizeof(__le16) + /* awake window */ | |
677 | ifmsh->ie_len; | |
678 | ||
679 | bcn = kzalloc(sizeof(*bcn) + head_len + tail_len, GFP_KERNEL); | |
680 | /* need an skb for IE builders to operate on */ | |
681 | skb = dev_alloc_skb(max(head_len, tail_len)); | |
682 | ||
683 | if (!bcn || !skb) | |
684 | goto out_free; | |
685 | ||
686 | /* | |
687 | * pointers go into the block we allocated, | |
688 | * memory is | beacon_data | head | tail | | |
689 | */ | |
690 | bcn->head = ((u8 *) bcn) + sizeof(*bcn); | |
691 | ||
692 | /* fill in the head */ | |
693 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, hdr_len); | |
694 | memset(mgmt, 0, hdr_len); | |
695 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
696 | IEEE80211_STYPE_BEACON); | |
697 | eth_broadcast_addr(mgmt->da); | |
698 | memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); | |
699 | memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN); | |
700 | ieee80211_mps_set_frame_flags(sdata, NULL, (void *) mgmt); | |
701 | mgmt->u.beacon.beacon_int = | |
702 | cpu_to_le16(sdata->vif.bss_conf.beacon_int); | |
703 | mgmt->u.beacon.capab_info |= cpu_to_le16( | |
704 | sdata->u.mesh.security ? WLAN_CAPABILITY_PRIVACY : 0); | |
705 | ||
706 | pos = skb_put(skb, 2); | |
707 | *pos++ = WLAN_EID_SSID; | |
708 | *pos++ = 0x0; | |
709 | ||
710 | if (ieee80211_add_srates_ie(sdata, skb, true, band) || | |
711 | mesh_add_ds_params_ie(skb, sdata)) | |
712 | goto out_free; | |
713 | ||
714 | bcn->head_len = skb->len; | |
715 | memcpy(bcn->head, skb->data, bcn->head_len); | |
716 | ||
717 | /* now the tail */ | |
718 | skb_trim(skb, 0); | |
719 | bcn->tail = bcn->head + bcn->head_len; | |
720 | ||
721 | if (ieee80211_add_ext_srates_ie(sdata, skb, true, band) || | |
722 | mesh_add_rsn_ie(skb, sdata) || | |
723 | mesh_add_ht_cap_ie(skb, sdata) || | |
724 | mesh_add_ht_oper_ie(skb, sdata) || | |
725 | mesh_add_meshid_ie(skb, sdata) || | |
726 | mesh_add_meshconf_ie(skb, sdata) || | |
727 | mesh_add_awake_window_ie(skb, sdata) || | |
728 | mesh_add_vendor_ies(skb, sdata)) | |
729 | goto out_free; | |
730 | ||
731 | bcn->tail_len = skb->len; | |
732 | memcpy(bcn->tail, skb->data, bcn->tail_len); | |
733 | ||
734 | dev_kfree_skb(skb); | |
735 | rcu_assign_pointer(ifmsh->beacon, bcn); | |
736 | return 0; | |
737 | out_free: | |
738 | kfree(bcn); | |
739 | dev_kfree_skb(skb); | |
740 | return -ENOMEM; | |
741 | } | |
742 | ||
743 | static int | |
744 | ieee80211_mesh_rebuild_beacon(struct ieee80211_if_mesh *ifmsh) | |
745 | { | |
746 | struct ieee80211_sub_if_data *sdata; | |
747 | struct beacon_data *old_bcn; | |
748 | int ret; | |
749 | sdata = container_of(ifmsh, struct ieee80211_sub_if_data, u.mesh); | |
750 | ||
751 | mutex_lock(&ifmsh->mtx); | |
752 | ||
753 | old_bcn = rcu_dereference_protected(ifmsh->beacon, | |
754 | lockdep_is_held(&ifmsh->mtx)); | |
755 | ret = ieee80211_mesh_build_beacon(ifmsh); | |
756 | if (ret) | |
757 | /* just reuse old beacon */ | |
758 | goto out; | |
759 | ||
760 | if (old_bcn) | |
761 | kfree_rcu(old_bcn, rcu_head); | |
762 | out: | |
763 | mutex_unlock(&ifmsh->mtx); | |
764 | return ret; | |
765 | } | |
766 | ||
767 | void ieee80211_mbss_info_change_notify(struct ieee80211_sub_if_data *sdata, | |
768 | u32 changed) | |
769 | { | |
770 | if (sdata->vif.bss_conf.enable_beacon && | |
771 | (changed & (BSS_CHANGED_BEACON | | |
772 | BSS_CHANGED_HT | | |
773 | BSS_CHANGED_BASIC_RATES | | |
774 | BSS_CHANGED_BEACON_INT))) | |
775 | if (ieee80211_mesh_rebuild_beacon(&sdata->u.mesh)) | |
776 | return; | |
777 | ieee80211_bss_info_change_notify(sdata, changed); | |
778 | } | |
779 | ||
780 | int ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata) | |
472dbc45 JB |
781 | { |
782 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
783 | struct ieee80211_local *local = sdata->local; | |
f4eabc91 CYY |
784 | u32 changed = BSS_CHANGED_BEACON | |
785 | BSS_CHANGED_BEACON_ENABLED | | |
786 | BSS_CHANGED_HT | | |
787 | BSS_CHANGED_BASIC_RATES | | |
788 | BSS_CHANGED_BEACON_INT; | |
789 | enum ieee80211_band band = ieee80211_get_sdata_band(sdata); | |
472dbc45 | 790 | |
09b17470 JB |
791 | local->fif_other_bss++; |
792 | /* mesh ifaces must set allmulti to forward mcast traffic */ | |
793 | atomic_inc(&local->iff_allmultis); | |
794 | ieee80211_configure_filter(local); | |
795 | ||
c7108a71 | 796 | ifmsh->mesh_cc_id = 0; /* Disabled */ |
c7108a71 | 797 | ifmsh->mesh_auth_id = 0; /* Disabled */ |
dbf498fb JC |
798 | /* register sync ops from extensible synchronization framework */ |
799 | ifmsh->sync_ops = ieee80211_mesh_sync_ops_get(ifmsh->mesh_sp_id); | |
800 | ifmsh->adjusting_tbtt = false; | |
801 | ifmsh->sync_offset_clockdrift_max = 0; | |
6b9ac442 | 802 | set_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags); |
63c5723b | 803 | ieee80211_mesh_root_setup(ifmsh); |
64592c8f | 804 | ieee80211_queue_work(&local->hw, &sdata->work); |
70c33eaa AN |
805 | sdata->vif.bss_conf.ht_operation_mode = |
806 | ifmsh->mshcfg.ht_opmode; | |
d6a83228 | 807 | sdata->vif.bss_conf.enable_beacon = true; |
d934f7d0 | 808 | sdata->vif.bss_conf.basic_rates = |
f4eabc91 CYY |
809 | ieee80211_mandatory_rates(local, band); |
810 | ||
39886b61 | 811 | changed |= ieee80211_mps_local_status_update(sdata); |
3f52b7e3 | 812 | |
2b5e1967 TP |
813 | if (ieee80211_mesh_build_beacon(ifmsh)) { |
814 | ieee80211_stop_mesh(sdata); | |
815 | return -ENOMEM; | |
816 | } | |
817 | ||
f4eabc91 | 818 | ieee80211_bss_info_change_notify(sdata, changed); |
c405c629 JB |
819 | |
820 | netif_carrier_on(sdata->dev); | |
2b5e1967 | 821 | return 0; |
472dbc45 JB |
822 | } |
823 | ||
824 | void ieee80211_stop_mesh(struct ieee80211_sub_if_data *sdata) | |
825 | { | |
09b17470 | 826 | struct ieee80211_local *local = sdata->local; |
29cbe68c | 827 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
2b5e1967 | 828 | struct beacon_data *bcn; |
29cbe68c | 829 | |
c405c629 JB |
830 | netif_carrier_off(sdata->dev); |
831 | ||
0d466b9c | 832 | /* stop the beacon */ |
29cbe68c | 833 | ifmsh->mesh_id_len = 0; |
d6a83228 JB |
834 | sdata->vif.bss_conf.enable_beacon = false; |
835 | clear_bit(SDATA_STATE_OFFCHANNEL_BEACON_STOPPED, &sdata->state); | |
29cbe68c | 836 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON_ENABLED); |
2b5e1967 TP |
837 | mutex_lock(&ifmsh->mtx); |
838 | bcn = rcu_dereference_protected(ifmsh->beacon, | |
839 | lockdep_is_held(&ifmsh->mtx)); | |
840 | rcu_assign_pointer(ifmsh->beacon, NULL); | |
841 | kfree_rcu(bcn, rcu_head); | |
842 | mutex_unlock(&ifmsh->mtx); | |
0d466b9c TP |
843 | |
844 | /* flush STAs and mpaths on this iface */ | |
b998e8bb | 845 | sta_info_flush(sdata); |
0d466b9c | 846 | mesh_path_flush_by_iface(sdata); |
09b17470 | 847 | |
3f52b7e3 MP |
848 | /* free all potentially still buffered group-addressed frames */ |
849 | local->total_ps_buffered -= skb_queue_len(&ifmsh->ps.bc_buf); | |
850 | skb_queue_purge(&ifmsh->ps.bc_buf); | |
851 | ||
472dbc45 | 852 | del_timer_sync(&sdata->u.mesh.housekeeping_timer); |
e304bfd3 | 853 | del_timer_sync(&sdata->u.mesh.mesh_path_root_timer); |
dd4c9260 | 854 | del_timer_sync(&sdata->u.mesh.mesh_path_timer); |
b7413430 JB |
855 | /* |
856 | * If the timer fired while we waited for it, it will have | |
857 | * requeued the work. Now the work will be running again | |
858 | * but will not rearm the timer again because it checks | |
859 | * whether the interface is running, which, at this point, | |
860 | * it no longer is. | |
861 | */ | |
64592c8f | 862 | cancel_work_sync(&sdata->work); |
09b17470 JB |
863 | |
864 | local->fif_other_bss--; | |
865 | atomic_dec(&local->iff_allmultis); | |
866 | ieee80211_configure_filter(local); | |
2d9957cc JB |
867 | |
868 | sdata->u.mesh.timers_running = 0; | |
472dbc45 JB |
869 | } |
870 | ||
9fb04b50 TP |
871 | static void |
872 | ieee80211_mesh_rx_probe_req(struct ieee80211_sub_if_data *sdata, | |
873 | struct ieee80211_mgmt *mgmt, size_t len) | |
874 | { | |
875 | struct ieee80211_local *local = sdata->local; | |
876 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
877 | struct sk_buff *presp; | |
878 | struct beacon_data *bcn; | |
879 | struct ieee80211_mgmt *hdr; | |
880 | struct ieee802_11_elems elems; | |
881 | size_t baselen; | |
882 | u8 *pos, *end; | |
883 | ||
884 | end = ((u8 *) mgmt) + len; | |
885 | pos = mgmt->u.probe_req.variable; | |
886 | baselen = (u8 *) pos - (u8 *) mgmt; | |
887 | if (baselen > len) | |
888 | return; | |
889 | ||
890 | ieee802_11_parse_elems(pos, len - baselen, &elems); | |
891 | ||
892 | /* 802.11-2012 10.1.4.3.2 */ | |
893 | if ((!ether_addr_equal(mgmt->da, sdata->vif.addr) && | |
894 | !is_broadcast_ether_addr(mgmt->da)) || | |
895 | elems.ssid_len != 0) | |
896 | return; | |
897 | ||
898 | if (elems.mesh_id_len != 0 && | |
899 | (elems.mesh_id_len != ifmsh->mesh_id_len || | |
900 | memcmp(elems.mesh_id, ifmsh->mesh_id, ifmsh->mesh_id_len))) | |
901 | return; | |
902 | ||
903 | rcu_read_lock(); | |
904 | bcn = rcu_dereference(ifmsh->beacon); | |
905 | ||
906 | if (!bcn) | |
907 | goto out; | |
908 | ||
909 | presp = dev_alloc_skb(local->tx_headroom + | |
910 | bcn->head_len + bcn->tail_len); | |
911 | if (!presp) | |
912 | goto out; | |
913 | ||
914 | skb_reserve(presp, local->tx_headroom); | |
915 | memcpy(skb_put(presp, bcn->head_len), bcn->head, bcn->head_len); | |
916 | memcpy(skb_put(presp, bcn->tail_len), bcn->tail, bcn->tail_len); | |
917 | hdr = (struct ieee80211_mgmt *) presp->data; | |
918 | hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
919 | IEEE80211_STYPE_PROBE_RESP); | |
920 | memcpy(hdr->da, mgmt->sa, ETH_ALEN); | |
921 | mpl_dbg(sdata, "sending probe resp. to %pM\n", hdr->da); | |
922 | IEEE80211_SKB_CB(presp)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; | |
923 | ieee80211_tx_skb(sdata, presp); | |
924 | out: | |
925 | rcu_read_unlock(); | |
926 | } | |
927 | ||
472dbc45 JB |
928 | static void ieee80211_mesh_rx_bcn_presp(struct ieee80211_sub_if_data *sdata, |
929 | u16 stype, | |
930 | struct ieee80211_mgmt *mgmt, | |
931 | size_t len, | |
932 | struct ieee80211_rx_status *rx_status) | |
933 | { | |
c6a1fa12 | 934 | struct ieee80211_local *local = sdata->local; |
dbf498fb | 935 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
472dbc45 JB |
936 | struct ieee802_11_elems elems; |
937 | struct ieee80211_channel *channel; | |
472dbc45 JB |
938 | size_t baselen; |
939 | int freq; | |
940 | enum ieee80211_band band = rx_status->band; | |
941 | ||
942 | /* ignore ProbeResp to foreign address */ | |
943 | if (stype == IEEE80211_STYPE_PROBE_RESP && | |
b203ca39 | 944 | !ether_addr_equal(mgmt->da, sdata->vif.addr)) |
472dbc45 JB |
945 | return; |
946 | ||
947 | baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; | |
948 | if (baselen > len) | |
949 | return; | |
950 | ||
951 | ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, | |
952 | &elems); | |
953 | ||
9a90bc81 TP |
954 | /* ignore non-mesh or secure / unsecure mismatch */ |
955 | if ((!elems.mesh_id || !elems.mesh_config) || | |
956 | (elems.rsn && sdata->u.mesh.security == IEEE80211_MESH_SEC_NONE) || | |
957 | (!elems.rsn && sdata->u.mesh.security != IEEE80211_MESH_SEC_NONE)) | |
5cff5e01 JC |
958 | return; |
959 | ||
472dbc45 | 960 | if (elems.ds_params && elems.ds_params_len == 1) |
59eb21a6 | 961 | freq = ieee80211_channel_to_frequency(elems.ds_params[0], band); |
472dbc45 JB |
962 | else |
963 | freq = rx_status->freq; | |
964 | ||
965 | channel = ieee80211_get_channel(local->hw.wiphy, freq); | |
966 | ||
967 | if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) | |
968 | return; | |
969 | ||
9a90bc81 | 970 | if (mesh_matches_local(sdata, &elems)) |
f743ff49 | 971 | mesh_neighbour_update(sdata, mgmt->sa, &elems); |
dbf498fb JC |
972 | |
973 | if (ifmsh->sync_ops) | |
974 | ifmsh->sync_ops->rx_bcn_presp(sdata, | |
975 | stype, mgmt, &elems, rx_status); | |
472dbc45 JB |
976 | } |
977 | ||
978 | static void ieee80211_mesh_rx_mgmt_action(struct ieee80211_sub_if_data *sdata, | |
979 | struct ieee80211_mgmt *mgmt, | |
980 | size_t len, | |
981 | struct ieee80211_rx_status *rx_status) | |
982 | { | |
983 | switch (mgmt->u.action.category) { | |
8db09850 TP |
984 | case WLAN_CATEGORY_SELF_PROTECTED: |
985 | switch (mgmt->u.action.u.self_prot.action_code) { | |
986 | case WLAN_SP_MESH_PEERING_OPEN: | |
987 | case WLAN_SP_MESH_PEERING_CLOSE: | |
988 | case WLAN_SP_MESH_PEERING_CONFIRM: | |
989 | mesh_rx_plink_frame(sdata, mgmt, len, rx_status); | |
990 | break; | |
991 | } | |
472dbc45 | 992 | break; |
25d49e4d TP |
993 | case WLAN_CATEGORY_MESH_ACTION: |
994 | if (mesh_action_is_path_sel(mgmt)) | |
995 | mesh_rx_path_sel_frame(sdata, mgmt, len); | |
472dbc45 JB |
996 | break; |
997 | } | |
998 | } | |
999 | ||
1fa57d01 JB |
1000 | void ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, |
1001 | struct sk_buff *skb) | |
472dbc45 JB |
1002 | { |
1003 | struct ieee80211_rx_status *rx_status; | |
472dbc45 JB |
1004 | struct ieee80211_mgmt *mgmt; |
1005 | u16 stype; | |
1006 | ||
f1d58c25 | 1007 | rx_status = IEEE80211_SKB_RXCB(skb); |
472dbc45 JB |
1008 | mgmt = (struct ieee80211_mgmt *) skb->data; |
1009 | stype = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE; | |
1010 | ||
1011 | switch (stype) { | |
1012 | case IEEE80211_STYPE_PROBE_RESP: | |
1013 | case IEEE80211_STYPE_BEACON: | |
1014 | ieee80211_mesh_rx_bcn_presp(sdata, stype, mgmt, skb->len, | |
1015 | rx_status); | |
1016 | break; | |
9fb04b50 TP |
1017 | case IEEE80211_STYPE_PROBE_REQ: |
1018 | ieee80211_mesh_rx_probe_req(sdata, mgmt, skb->len); | |
1019 | break; | |
472dbc45 JB |
1020 | case IEEE80211_STYPE_ACTION: |
1021 | ieee80211_mesh_rx_mgmt_action(sdata, mgmt, skb->len, rx_status); | |
1022 | break; | |
1023 | } | |
472dbc45 JB |
1024 | } |
1025 | ||
1fa57d01 | 1026 | void ieee80211_mesh_work(struct ieee80211_sub_if_data *sdata) |
472dbc45 | 1027 | { |
472dbc45 | 1028 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
472dbc45 JB |
1029 | |
1030 | if (ifmsh->preq_queue_len && | |
1031 | time_after(jiffies, | |
1032 | ifmsh->last_preq + msecs_to_jiffies(ifmsh->mshcfg.dot11MeshHWMPpreqMinInterval))) | |
1033 | mesh_path_start_discovery(sdata); | |
1034 | ||
18889231 JC |
1035 | if (test_and_clear_bit(MESH_WORK_GROW_MPATH_TABLE, &ifmsh->wrkq_flags)) |
1036 | mesh_mpath_table_grow(); | |
1037 | ||
dcac908b | 1038 | if (test_and_clear_bit(MESH_WORK_GROW_MPP_TABLE, &ifmsh->wrkq_flags)) |
18889231 JC |
1039 | mesh_mpp_table_grow(); |
1040 | ||
1041 | if (test_and_clear_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags)) | |
472dbc45 | 1042 | ieee80211_mesh_housekeeping(sdata, ifmsh); |
e304bfd3 RP |
1043 | |
1044 | if (test_and_clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags)) | |
1045 | ieee80211_mesh_rootpath(sdata); | |
dbf498fb JC |
1046 | |
1047 | if (test_and_clear_bit(MESH_WORK_DRIFT_ADJUST, &ifmsh->wrkq_flags)) | |
1048 | mesh_sync_adjust_tbtt(sdata); | |
472dbc45 JB |
1049 | } |
1050 | ||
1051 | void ieee80211_mesh_notify_scan_completed(struct ieee80211_local *local) | |
1052 | { | |
1053 | struct ieee80211_sub_if_data *sdata; | |
1054 | ||
1055 | rcu_read_lock(); | |
1056 | list_for_each_entry_rcu(sdata, &local->interfaces, list) | |
1057 | if (ieee80211_vif_is_mesh(&sdata->vif)) | |
64592c8f | 1058 | ieee80211_queue_work(&local->hw, &sdata->work); |
472dbc45 JB |
1059 | rcu_read_unlock(); |
1060 | } | |
1061 | ||
902acc78 JB |
1062 | void ieee80211_mesh_init_sdata(struct ieee80211_sub_if_data *sdata) |
1063 | { | |
472dbc45 | 1064 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
ad2d223a | 1065 | static u8 zero_addr[ETH_ALEN] = {}; |
472dbc45 | 1066 | |
472dbc45 JB |
1067 | setup_timer(&ifmsh->housekeeping_timer, |
1068 | ieee80211_mesh_housekeeping_timer, | |
1069 | (unsigned long) sdata); | |
472dbc45 | 1070 | |
472dbc45 JB |
1071 | ifmsh->accepting_plinks = true; |
1072 | ifmsh->preq_id = 0; | |
d19b3bf6 | 1073 | ifmsh->sn = 0; |
5ee68e5b | 1074 | ifmsh->num_gates = 0; |
472dbc45 | 1075 | atomic_set(&ifmsh->mpaths, 0); |
f698d856 | 1076 | mesh_rmc_init(sdata); |
472dbc45 | 1077 | ifmsh->last_preq = jiffies; |
dca7e943 | 1078 | ifmsh->next_perr = jiffies; |
902acc78 JB |
1079 | /* Allocate all mesh structures when creating the first mesh interface. */ |
1080 | if (!mesh_allocated) | |
1081 | ieee80211s_init(); | |
472dbc45 | 1082 | setup_timer(&ifmsh->mesh_path_timer, |
902acc78 JB |
1083 | ieee80211_mesh_path_timer, |
1084 | (unsigned long) sdata); | |
e304bfd3 RP |
1085 | setup_timer(&ifmsh->mesh_path_root_timer, |
1086 | ieee80211_mesh_path_root_timer, | |
1087 | (unsigned long) sdata); | |
472dbc45 | 1088 | INIT_LIST_HEAD(&ifmsh->preq_queue.list); |
3f52b7e3 | 1089 | skb_queue_head_init(&ifmsh->ps.bc_buf); |
472dbc45 | 1090 | spin_lock_init(&ifmsh->mesh_preq_queue_lock); |
dbf498fb | 1091 | spin_lock_init(&ifmsh->sync_offset_lock); |
2b5e1967 TP |
1092 | RCU_INIT_POINTER(ifmsh->beacon, NULL); |
1093 | mutex_init(&ifmsh->mtx); | |
ad2d223a JB |
1094 | |
1095 | sdata->vif.bss_conf.bssid = zero_addr; | |
472dbc45 | 1096 | } |