Commit | Line | Data |
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46900298 JB |
1 | /* |
2 | * IBSS mode implementation | |
3 | * Copyright 2003-2008, Jouni Malinen <j@w1.fi> | |
4 | * Copyright 2004, Instant802 Networks, Inc. | |
5 | * Copyright 2005, Devicescape Software, Inc. | |
6 | * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> | |
7 | * Copyright 2007, Michael Wu <flamingice@sourmilk.net> | |
8 | * Copyright 2009, Johannes Berg <johannes@sipsolutions.net> | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License version 2 as | |
12 | * published by the Free Software Foundation. | |
13 | */ | |
14 | ||
15 | #include <linux/delay.h> | |
16 | #include <linux/if_ether.h> | |
17 | #include <linux/skbuff.h> | |
18 | #include <linux/if_arp.h> | |
19 | #include <linux/etherdevice.h> | |
20 | #include <linux/rtnetlink.h> | |
21 | #include <net/mac80211.h> | |
22 | #include <asm/unaligned.h> | |
23 | ||
24 | #include "ieee80211_i.h" | |
24487981 | 25 | #include "driver-ops.h" |
46900298 JB |
26 | #include "rate.h" |
27 | ||
28 | #define IEEE80211_SCAN_INTERVAL (2 * HZ) | |
29 | #define IEEE80211_SCAN_INTERVAL_SLOW (15 * HZ) | |
30 | #define IEEE80211_IBSS_JOIN_TIMEOUT (7 * HZ) | |
31 | ||
32 | #define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ) | |
4a332a38 | 33 | #define IEEE80211_IBSS_MERGE_DELAY 0x400000 |
46900298 JB |
34 | #define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ) |
35 | ||
36 | #define IEEE80211_IBSS_MAX_STA_ENTRIES 128 | |
37 | ||
38 | ||
39 | static void ieee80211_rx_mgmt_auth_ibss(struct ieee80211_sub_if_data *sdata, | |
40 | struct ieee80211_mgmt *mgmt, | |
41 | size_t len) | |
42 | { | |
43 | u16 auth_alg, auth_transaction, status_code; | |
44 | ||
45 | if (len < 24 + 6) | |
46 | return; | |
47 | ||
48 | auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); | |
49 | auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); | |
50 | status_code = le16_to_cpu(mgmt->u.auth.status_code); | |
51 | ||
52 | /* | |
53 | * IEEE 802.11 standard does not require authentication in IBSS | |
54 | * networks and most implementations do not seem to use it. | |
55 | * However, try to reply to authentication attempts if someone | |
56 | * has actually implemented this. | |
57 | */ | |
58 | if (auth_alg == WLAN_AUTH_OPEN && auth_transaction == 1) | |
59 | ieee80211_send_auth(sdata, 2, WLAN_AUTH_OPEN, NULL, 0, | |
fffd0934 | 60 | sdata->u.ibss.bssid, NULL, 0, 0); |
46900298 JB |
61 | } |
62 | ||
af8cdcd8 JB |
63 | static void __ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata, |
64 | const u8 *bssid, const int beacon_int, | |
65 | struct ieee80211_channel *chan, | |
b59066a2 | 66 | const u32 basic_rates, |
af8cdcd8 | 67 | const u16 capability, u64 tsf) |
46900298 JB |
68 | { |
69 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
70 | struct ieee80211_local *local = sdata->local; | |
b59066a2 | 71 | int rates, i; |
46900298 JB |
72 | struct sk_buff *skb; |
73 | struct ieee80211_mgmt *mgmt; | |
74 | u8 *pos; | |
75 | struct ieee80211_supported_band *sband; | |
f446d10f | 76 | struct cfg80211_bss *bss; |
57c4d7b4 | 77 | u32 bss_change; |
b59066a2 | 78 | u8 supp_rates[IEEE80211_MAX_SUPP_RATES]; |
24487981 JB |
79 | |
80 | /* Reset own TSF to allow time synchronization work. */ | |
81 | drv_reset_tsf(local); | |
46900298 | 82 | |
af8cdcd8 JB |
83 | skb = ifibss->skb; |
84 | rcu_assign_pointer(ifibss->presp, NULL); | |
85 | synchronize_rcu(); | |
86 | skb->data = skb->head; | |
87 | skb->len = 0; | |
88 | skb_reset_tail_pointer(skb); | |
89 | skb_reserve(skb, sdata->local->hw.extra_tx_headroom); | |
46900298 | 90 | |
af8cdcd8 JB |
91 | if (memcmp(ifibss->bssid, bssid, ETH_ALEN)) |
92 | sta_info_flush(sdata->local, sdata); | |
46900298 JB |
93 | |
94 | memcpy(ifibss->bssid, bssid, ETH_ALEN); | |
46900298 | 95 | |
af8cdcd8 | 96 | sdata->drop_unencrypted = capability & WLAN_CAPABILITY_PRIVACY ? 1 : 0; |
46900298 | 97 | |
af8cdcd8 JB |
98 | local->oper_channel = chan; |
99 | local->oper_channel_type = NL80211_CHAN_NO_HT; | |
100 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL); | |
57c4d7b4 | 101 | |
af8cdcd8 | 102 | sband = local->hw.wiphy->bands[chan->band]; |
46900298 | 103 | |
b59066a2 JB |
104 | /* build supported rates array */ |
105 | pos = supp_rates; | |
106 | for (i = 0; i < sband->n_bitrates; i++) { | |
107 | int rate = sband->bitrates[i].bitrate; | |
108 | u8 basic = 0; | |
109 | if (basic_rates & BIT(i)) | |
110 | basic = 0x80; | |
111 | *pos++ = basic | (u8) (rate / 5); | |
112 | } | |
113 | ||
46900298 | 114 | /* Build IBSS probe response */ |
af8cdcd8 | 115 | mgmt = (void *) skb_put(skb, 24 + sizeof(mgmt->u.beacon)); |
46900298 JB |
116 | memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon)); |
117 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
118 | IEEE80211_STYPE_PROBE_RESP); | |
119 | memset(mgmt->da, 0xff, ETH_ALEN); | |
120 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); | |
121 | memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN); | |
57c4d7b4 | 122 | mgmt->u.beacon.beacon_int = cpu_to_le16(beacon_int); |
707c1b4e | 123 | mgmt->u.beacon.timestamp = cpu_to_le64(tsf); |
46900298 JB |
124 | mgmt->u.beacon.capab_info = cpu_to_le16(capability); |
125 | ||
126 | pos = skb_put(skb, 2 + ifibss->ssid_len); | |
127 | *pos++ = WLAN_EID_SSID; | |
128 | *pos++ = ifibss->ssid_len; | |
129 | memcpy(pos, ifibss->ssid, ifibss->ssid_len); | |
130 | ||
b59066a2 | 131 | rates = sband->n_bitrates; |
46900298 JB |
132 | if (rates > 8) |
133 | rates = 8; | |
134 | pos = skb_put(skb, 2 + rates); | |
135 | *pos++ = WLAN_EID_SUPP_RATES; | |
136 | *pos++ = rates; | |
137 | memcpy(pos, supp_rates, rates); | |
138 | ||
139 | if (sband->band == IEEE80211_BAND_2GHZ) { | |
140 | pos = skb_put(skb, 2 + 1); | |
141 | *pos++ = WLAN_EID_DS_PARAMS; | |
142 | *pos++ = 1; | |
af8cdcd8 | 143 | *pos++ = ieee80211_frequency_to_channel(chan->center_freq); |
46900298 JB |
144 | } |
145 | ||
146 | pos = skb_put(skb, 2 + 2); | |
147 | *pos++ = WLAN_EID_IBSS_PARAMS; | |
148 | *pos++ = 2; | |
149 | /* FIX: set ATIM window based on scan results */ | |
150 | *pos++ = 0; | |
151 | *pos++ = 0; | |
152 | ||
b59066a2 JB |
153 | if (sband->n_bitrates > 8) { |
154 | rates = sband->n_bitrates - 8; | |
46900298 JB |
155 | pos = skb_put(skb, 2 + rates); |
156 | *pos++ = WLAN_EID_EXT_SUPP_RATES; | |
157 | *pos++ = rates; | |
158 | memcpy(pos, &supp_rates[8], rates); | |
159 | } | |
160 | ||
af8cdcd8 JB |
161 | if (ifibss->ie_len) |
162 | memcpy(skb_put(skb, ifibss->ie_len), | |
163 | ifibss->ie, ifibss->ie_len); | |
164 | ||
165 | rcu_assign_pointer(ifibss->presp, skb); | |
46900298 | 166 | |
2d0ddec5 JB |
167 | sdata->vif.bss_conf.beacon_int = beacon_int; |
168 | bss_change = BSS_CHANGED_BEACON_INT; | |
169 | bss_change |= ieee80211_reset_erp_info(sdata); | |
170 | bss_change |= BSS_CHANGED_BSSID; | |
171 | bss_change |= BSS_CHANGED_BEACON; | |
172 | bss_change |= BSS_CHANGED_BEACON_ENABLED; | |
173 | ieee80211_bss_info_change_notify(sdata, bss_change); | |
46900298 | 174 | |
b59066a2 | 175 | ieee80211_sta_def_wmm_params(sdata, sband->n_bitrates, supp_rates); |
46900298 | 176 | |
46900298 | 177 | ifibss->state = IEEE80211_IBSS_MLME_JOINED; |
af8cdcd8 JB |
178 | mod_timer(&ifibss->timer, |
179 | round_jiffies(jiffies + IEEE80211_IBSS_MERGE_INTERVAL)); | |
46900298 | 180 | |
f446d10f JB |
181 | bss = cfg80211_inform_bss_frame(local->hw.wiphy, local->hw.conf.channel, |
182 | mgmt, skb->len, 0, GFP_KERNEL); | |
183 | cfg80211_put_bss(bss); | |
af8cdcd8 | 184 | cfg80211_ibss_joined(sdata->dev, ifibss->bssid, GFP_KERNEL); |
46900298 JB |
185 | } |
186 | ||
af8cdcd8 JB |
187 | static void ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata, |
188 | struct ieee80211_bss *bss) | |
46900298 | 189 | { |
b59066a2 JB |
190 | struct ieee80211_supported_band *sband; |
191 | u32 basic_rates; | |
192 | int i, j; | |
57c4d7b4 JB |
193 | u16 beacon_int = bss->cbss.beacon_interval; |
194 | ||
195 | if (beacon_int < 10) | |
196 | beacon_int = 10; | |
197 | ||
b59066a2 JB |
198 | sband = sdata->local->hw.wiphy->bands[bss->cbss.channel->band]; |
199 | ||
200 | basic_rates = 0; | |
201 | ||
202 | for (i = 0; i < bss->supp_rates_len; i++) { | |
203 | int rate = (bss->supp_rates[i] & 0x7f) * 5; | |
204 | bool is_basic = !!(bss->supp_rates[i] & 0x80); | |
205 | ||
206 | for (j = 0; j < sband->n_bitrates; j++) { | |
207 | if (sband->bitrates[j].bitrate == rate) { | |
208 | if (is_basic) | |
209 | basic_rates |= BIT(j); | |
210 | break; | |
211 | } | |
212 | } | |
213 | } | |
214 | ||
af8cdcd8 | 215 | __ieee80211_sta_join_ibss(sdata, bss->cbss.bssid, |
57c4d7b4 | 216 | beacon_int, |
af8cdcd8 | 217 | bss->cbss.channel, |
b59066a2 | 218 | basic_rates, |
af8cdcd8 JB |
219 | bss->cbss.capability, |
220 | bss->cbss.tsf); | |
46900298 JB |
221 | } |
222 | ||
223 | static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, | |
224 | struct ieee80211_mgmt *mgmt, | |
225 | size_t len, | |
226 | struct ieee80211_rx_status *rx_status, | |
227 | struct ieee802_11_elems *elems, | |
228 | bool beacon) | |
229 | { | |
230 | struct ieee80211_local *local = sdata->local; | |
231 | int freq; | |
232 | struct ieee80211_bss *bss; | |
233 | struct sta_info *sta; | |
234 | struct ieee80211_channel *channel; | |
235 | u64 beacon_timestamp, rx_timestamp; | |
236 | u32 supp_rates = 0; | |
237 | enum ieee80211_band band = rx_status->band; | |
238 | ||
239 | if (elems->ds_params && elems->ds_params_len == 1) | |
240 | freq = ieee80211_channel_to_frequency(elems->ds_params[0]); | |
241 | else | |
242 | freq = rx_status->freq; | |
243 | ||
244 | channel = ieee80211_get_channel(local->hw.wiphy, freq); | |
245 | ||
246 | if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) | |
247 | return; | |
248 | ||
249 | if (sdata->vif.type == NL80211_IFTYPE_ADHOC && elems->supp_rates && | |
250 | memcmp(mgmt->bssid, sdata->u.ibss.bssid, ETH_ALEN) == 0) { | |
251 | supp_rates = ieee80211_sta_get_rates(local, elems, band); | |
252 | ||
253 | rcu_read_lock(); | |
254 | ||
255 | sta = sta_info_get(local, mgmt->sa); | |
256 | if (sta) { | |
257 | u32 prev_rates; | |
258 | ||
259 | prev_rates = sta->sta.supp_rates[band]; | |
260 | /* make sure mandatory rates are always added */ | |
261 | sta->sta.supp_rates[band] = supp_rates | | |
262 | ieee80211_mandatory_rates(local, band); | |
263 | ||
264 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
265 | if (sta->sta.supp_rates[band] != prev_rates) | |
266 | printk(KERN_DEBUG "%s: updated supp_rates set " | |
267 | "for %pM based on beacon info (0x%llx | " | |
268 | "0x%llx -> 0x%llx)\n", | |
269 | sdata->dev->name, | |
270 | sta->sta.addr, | |
271 | (unsigned long long) prev_rates, | |
272 | (unsigned long long) supp_rates, | |
273 | (unsigned long long) sta->sta.supp_rates[band]); | |
274 | #endif | |
275 | } else | |
276 | ieee80211_ibss_add_sta(sdata, mgmt->bssid, mgmt->sa, supp_rates); | |
277 | ||
278 | rcu_read_unlock(); | |
279 | } | |
280 | ||
281 | bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems, | |
282 | channel, beacon); | |
283 | if (!bss) | |
284 | return; | |
285 | ||
286 | /* was just updated in ieee80211_bss_info_update */ | |
287 | beacon_timestamp = bss->cbss.tsf; | |
288 | ||
289 | /* check if we need to merge IBSS */ | |
290 | ||
291 | /* merge only on beacons (???) */ | |
292 | if (!beacon) | |
293 | goto put_bss; | |
294 | ||
295 | /* we use a fixed BSSID */ | |
af8cdcd8 | 296 | if (sdata->u.ibss.bssid) |
46900298 JB |
297 | goto put_bss; |
298 | ||
299 | /* not an IBSS */ | |
300 | if (!(bss->cbss.capability & WLAN_CAPABILITY_IBSS)) | |
301 | goto put_bss; | |
302 | ||
303 | /* different channel */ | |
304 | if (bss->cbss.channel != local->oper_channel) | |
305 | goto put_bss; | |
306 | ||
307 | /* different SSID */ | |
308 | if (elems->ssid_len != sdata->u.ibss.ssid_len || | |
309 | memcmp(elems->ssid, sdata->u.ibss.ssid, | |
310 | sdata->u.ibss.ssid_len)) | |
311 | goto put_bss; | |
312 | ||
34e8f082 AF |
313 | /* same BSSID */ |
314 | if (memcmp(bss->cbss.bssid, sdata->u.ibss.bssid, ETH_ALEN) == 0) | |
315 | goto put_bss; | |
316 | ||
46900298 JB |
317 | if (rx_status->flag & RX_FLAG_TSFT) { |
318 | /* | |
319 | * For correct IBSS merging we need mactime; since mactime is | |
320 | * defined as the time the first data symbol of the frame hits | |
321 | * the PHY, and the timestamp of the beacon is defined as "the | |
322 | * time that the data symbol containing the first bit of the | |
323 | * timestamp is transmitted to the PHY plus the transmitting | |
324 | * STA's delays through its local PHY from the MAC-PHY | |
325 | * interface to its interface with the WM" (802.11 11.1.2) | |
326 | * - equals the time this bit arrives at the receiver - we have | |
327 | * to take into account the offset between the two. | |
328 | * | |
329 | * E.g. at 1 MBit that means mactime is 192 usec earlier | |
330 | * (=24 bytes * 8 usecs/byte) than the beacon timestamp. | |
331 | */ | |
332 | int rate; | |
333 | ||
334 | if (rx_status->flag & RX_FLAG_HT) | |
335 | rate = 65; /* TODO: HT rates */ | |
336 | else | |
337 | rate = local->hw.wiphy->bands[band]-> | |
338 | bitrates[rx_status->rate_idx].bitrate; | |
339 | ||
340 | rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate); | |
24487981 JB |
341 | } else { |
342 | /* | |
343 | * second best option: get current TSF | |
344 | * (will return -1 if not supported) | |
345 | */ | |
346 | rx_timestamp = drv_get_tsf(local); | |
347 | } | |
46900298 JB |
348 | |
349 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
350 | printk(KERN_DEBUG "RX beacon SA=%pM BSSID=" | |
351 | "%pM TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n", | |
352 | mgmt->sa, mgmt->bssid, | |
353 | (unsigned long long)rx_timestamp, | |
354 | (unsigned long long)beacon_timestamp, | |
355 | (unsigned long long)(rx_timestamp - beacon_timestamp), | |
356 | jiffies); | |
357 | #endif | |
358 | ||
4a332a38 AF |
359 | /* give slow hardware some time to do the TSF sync */ |
360 | if (rx_timestamp < IEEE80211_IBSS_MERGE_DELAY) | |
361 | goto put_bss; | |
362 | ||
46900298 JB |
363 | if (beacon_timestamp > rx_timestamp) { |
364 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
365 | printk(KERN_DEBUG "%s: beacon TSF higher than " | |
366 | "local TSF - IBSS merge with BSSID %pM\n", | |
367 | sdata->dev->name, mgmt->bssid); | |
368 | #endif | |
369 | ieee80211_sta_join_ibss(sdata, bss); | |
370 | ieee80211_ibss_add_sta(sdata, mgmt->bssid, mgmt->sa, supp_rates); | |
371 | } | |
372 | ||
373 | put_bss: | |
374 | ieee80211_rx_bss_put(local, bss); | |
375 | } | |
376 | ||
377 | /* | |
378 | * Add a new IBSS station, will also be called by the RX code when, | |
379 | * in IBSS mode, receiving a frame from a yet-unknown station, hence | |
380 | * must be callable in atomic context. | |
381 | */ | |
382 | struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata, | |
383 | u8 *bssid,u8 *addr, u32 supp_rates) | |
384 | { | |
2e10d330 | 385 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
46900298 JB |
386 | struct ieee80211_local *local = sdata->local; |
387 | struct sta_info *sta; | |
388 | int band = local->hw.conf.channel->band; | |
389 | ||
af8cdcd8 JB |
390 | /* |
391 | * XXX: Consider removing the least recently used entry and | |
392 | * allow new one to be added. | |
393 | */ | |
46900298 | 394 | if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) { |
af8cdcd8 JB |
395 | if (net_ratelimit()) |
396 | printk(KERN_DEBUG "%s: No room for a new IBSS STA entry %pM\n", | |
397 | sdata->dev->name, addr); | |
46900298 JB |
398 | return NULL; |
399 | } | |
400 | ||
2e10d330 FF |
401 | if (ifibss->state == IEEE80211_IBSS_MLME_SEARCH) |
402 | return NULL; | |
403 | ||
46900298 JB |
404 | if (compare_ether_addr(bssid, sdata->u.ibss.bssid)) |
405 | return NULL; | |
406 | ||
407 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
408 | printk(KERN_DEBUG "%s: Adding new IBSS station %pM (dev=%s)\n", | |
409 | wiphy_name(local->hw.wiphy), addr, sdata->dev->name); | |
410 | #endif | |
411 | ||
412 | sta = sta_info_alloc(sdata, addr, GFP_ATOMIC); | |
413 | if (!sta) | |
414 | return NULL; | |
415 | ||
416 | set_sta_flags(sta, WLAN_STA_AUTHORIZED); | |
417 | ||
418 | /* make sure mandatory rates are always added */ | |
419 | sta->sta.supp_rates[band] = supp_rates | | |
420 | ieee80211_mandatory_rates(local, band); | |
421 | ||
422 | rate_control_rate_init(sta); | |
423 | ||
424 | if (sta_info_insert(sta)) | |
425 | return NULL; | |
426 | ||
427 | return sta; | |
428 | } | |
429 | ||
430 | static int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data *sdata) | |
431 | { | |
432 | struct ieee80211_local *local = sdata->local; | |
433 | int active = 0; | |
434 | struct sta_info *sta; | |
435 | ||
436 | rcu_read_lock(); | |
437 | ||
438 | list_for_each_entry_rcu(sta, &local->sta_list, list) { | |
439 | if (sta->sdata == sdata && | |
440 | time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL, | |
441 | jiffies)) { | |
442 | active++; | |
443 | break; | |
444 | } | |
445 | } | |
446 | ||
447 | rcu_read_unlock(); | |
448 | ||
449 | return active; | |
450 | } | |
451 | ||
452 | ||
453 | static void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data *sdata) | |
454 | { | |
455 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
456 | ||
af8cdcd8 JB |
457 | mod_timer(&ifibss->timer, |
458 | round_jiffies(jiffies + IEEE80211_IBSS_MERGE_INTERVAL)); | |
46900298 JB |
459 | |
460 | ieee80211_sta_expire(sdata, IEEE80211_IBSS_INACTIVITY_LIMIT); | |
af8cdcd8 | 461 | |
450aae3d S |
462 | if (time_before(jiffies, ifibss->last_scan_completed + |
463 | IEEE80211_IBSS_MERGE_INTERVAL)) | |
464 | return; | |
465 | ||
46900298 JB |
466 | if (ieee80211_sta_active_ibss(sdata)) |
467 | return; | |
468 | ||
af8cdcd8 | 469 | if (ifibss->fixed_channel) |
46900298 JB |
470 | return; |
471 | ||
472 | printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other " | |
473 | "IBSS networks with same SSID (merge)\n", sdata->dev->name); | |
474 | ||
f3b85252 | 475 | ieee80211_request_internal_scan(sdata, ifibss->ssid, ifibss->ssid_len); |
46900298 JB |
476 | } |
477 | ||
af8cdcd8 | 478 | static void ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata) |
46900298 JB |
479 | { |
480 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
481 | struct ieee80211_local *local = sdata->local; | |
482 | struct ieee80211_supported_band *sband; | |
46900298 | 483 | u8 bssid[ETH_ALEN]; |
46900298 JB |
484 | u16 capability; |
485 | int i; | |
486 | ||
af8cdcd8 | 487 | if (ifibss->fixed_bssid) { |
46900298 JB |
488 | memcpy(bssid, ifibss->bssid, ETH_ALEN); |
489 | } else { | |
490 | /* Generate random, not broadcast, locally administered BSSID. Mix in | |
491 | * own MAC address to make sure that devices that do not have proper | |
492 | * random number generator get different BSSID. */ | |
493 | get_random_bytes(bssid, ETH_ALEN); | |
494 | for (i = 0; i < ETH_ALEN; i++) | |
495 | bssid[i] ^= sdata->dev->dev_addr[i]; | |
496 | bssid[0] &= ~0x01; | |
497 | bssid[0] |= 0x02; | |
498 | } | |
499 | ||
500 | printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %pM\n", | |
501 | sdata->dev->name, bssid); | |
502 | ||
af8cdcd8 | 503 | sband = local->hw.wiphy->bands[ifibss->channel->band]; |
46900298 | 504 | |
46900298 JB |
505 | capability = WLAN_CAPABILITY_IBSS; |
506 | ||
fffd0934 | 507 | if (ifibss->privacy) |
46900298 JB |
508 | capability |= WLAN_CAPABILITY_PRIVACY; |
509 | else | |
510 | sdata->drop_unencrypted = 0; | |
511 | ||
57c4d7b4 | 512 | __ieee80211_sta_join_ibss(sdata, bssid, sdata->vif.bss_conf.beacon_int, |
b59066a2 JB |
513 | ifibss->channel, 3, /* first two are basic */ |
514 | capability, 0); | |
46900298 JB |
515 | } |
516 | ||
af8cdcd8 | 517 | static void ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata) |
46900298 JB |
518 | { |
519 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
520 | struct ieee80211_local *local = sdata->local; | |
521 | struct ieee80211_bss *bss; | |
af8cdcd8 | 522 | struct ieee80211_channel *chan = NULL; |
46900298 JB |
523 | const u8 *bssid = NULL; |
524 | int active_ibss; | |
e0d61887 | 525 | u16 capability; |
46900298 | 526 | |
46900298 JB |
527 | active_ibss = ieee80211_sta_active_ibss(sdata); |
528 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
529 | printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n", | |
530 | sdata->dev->name, active_ibss); | |
531 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ | |
532 | ||
533 | if (active_ibss) | |
af8cdcd8 | 534 | return; |
46900298 | 535 | |
e0d61887 | 536 | capability = WLAN_CAPABILITY_IBSS; |
fffd0934 | 537 | if (ifibss->privacy) |
e0d61887 | 538 | capability |= WLAN_CAPABILITY_PRIVACY; |
af8cdcd8 JB |
539 | if (ifibss->fixed_bssid) |
540 | bssid = ifibss->bssid; | |
541 | if (ifibss->fixed_channel) | |
542 | chan = ifibss->channel; | |
543 | if (!is_zero_ether_addr(ifibss->bssid)) | |
46900298 | 544 | bssid = ifibss->bssid; |
af8cdcd8 | 545 | bss = (void *)cfg80211_get_bss(local->hw.wiphy, chan, bssid, |
46900298 | 546 | ifibss->ssid, ifibss->ssid_len, |
e0d61887 | 547 | WLAN_CAPABILITY_IBSS | |
db67645d JB |
548 | WLAN_CAPABILITY_PRIVACY, |
549 | capability); | |
46900298 | 550 | |
d419b9f0 | 551 | if (bss) { |
46900298 | 552 | #ifdef CONFIG_MAC80211_IBSS_DEBUG |
46900298 JB |
553 | printk(KERN_DEBUG " sta_find_ibss: selected %pM current " |
554 | "%pM\n", bss->cbss.bssid, ifibss->bssid); | |
555 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ | |
556 | ||
46900298 JB |
557 | printk(KERN_DEBUG "%s: Selected IBSS BSSID %pM" |
558 | " based on configured SSID\n", | |
559 | sdata->dev->name, bss->cbss.bssid); | |
560 | ||
af8cdcd8 | 561 | ieee80211_sta_join_ibss(sdata, bss); |
46900298 | 562 | ieee80211_rx_bss_put(local, bss); |
af8cdcd8 | 563 | return; |
d419b9f0 | 564 | } |
46900298 JB |
565 | |
566 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
567 | printk(KERN_DEBUG " did not try to join ibss\n"); | |
568 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ | |
569 | ||
570 | /* Selected IBSS not found in current scan results - try to scan */ | |
571 | if (ifibss->state == IEEE80211_IBSS_MLME_JOINED && | |
572 | !ieee80211_sta_active_ibss(sdata)) { | |
af8cdcd8 JB |
573 | mod_timer(&ifibss->timer, |
574 | round_jiffies(jiffies + IEEE80211_IBSS_MERGE_INTERVAL)); | |
575 | } else if (time_after(jiffies, ifibss->last_scan_completed + | |
46900298 JB |
576 | IEEE80211_SCAN_INTERVAL)) { |
577 | printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to " | |
578 | "join\n", sdata->dev->name); | |
579 | ||
f3b85252 JB |
580 | ieee80211_request_internal_scan(sdata, ifibss->ssid, |
581 | ifibss->ssid_len); | |
46900298 JB |
582 | } else if (ifibss->state != IEEE80211_IBSS_MLME_JOINED) { |
583 | int interval = IEEE80211_SCAN_INTERVAL; | |
584 | ||
585 | if (time_after(jiffies, ifibss->ibss_join_req + | |
586 | IEEE80211_IBSS_JOIN_TIMEOUT)) { | |
af8cdcd8 JB |
587 | if (!(local->oper_channel->flags & IEEE80211_CHAN_NO_IBSS)) { |
588 | ieee80211_sta_create_ibss(sdata); | |
589 | return; | |
590 | } | |
46900298 JB |
591 | printk(KERN_DEBUG "%s: IBSS not allowed on" |
592 | " %d MHz\n", sdata->dev->name, | |
593 | local->hw.conf.channel->center_freq); | |
594 | ||
595 | /* No IBSS found - decrease scan interval and continue | |
596 | * scanning. */ | |
597 | interval = IEEE80211_SCAN_INTERVAL_SLOW; | |
598 | } | |
599 | ||
600 | ifibss->state = IEEE80211_IBSS_MLME_SEARCH; | |
af8cdcd8 JB |
601 | mod_timer(&ifibss->timer, |
602 | round_jiffies(jiffies + interval)); | |
46900298 | 603 | } |
46900298 JB |
604 | } |
605 | ||
606 | static void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data *sdata, | |
607 | struct ieee80211_mgmt *mgmt, | |
608 | size_t len) | |
609 | { | |
610 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
611 | struct ieee80211_local *local = sdata->local; | |
612 | int tx_last_beacon; | |
613 | struct sk_buff *skb; | |
614 | struct ieee80211_mgmt *resp; | |
615 | u8 *pos, *end; | |
616 | ||
617 | if (ifibss->state != IEEE80211_IBSS_MLME_JOINED || | |
af8cdcd8 | 618 | len < 24 + 2 || !ifibss->presp) |
46900298 JB |
619 | return; |
620 | ||
24487981 | 621 | tx_last_beacon = drv_tx_last_beacon(local); |
46900298 JB |
622 | |
623 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
624 | printk(KERN_DEBUG "%s: RX ProbeReq SA=%pM DA=%pM BSSID=%pM" | |
625 | " (tx_last_beacon=%d)\n", | |
626 | sdata->dev->name, mgmt->sa, mgmt->da, | |
627 | mgmt->bssid, tx_last_beacon); | |
628 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ | |
629 | ||
630 | if (!tx_last_beacon) | |
631 | return; | |
632 | ||
633 | if (memcmp(mgmt->bssid, ifibss->bssid, ETH_ALEN) != 0 && | |
634 | memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0) | |
635 | return; | |
636 | ||
637 | end = ((u8 *) mgmt) + len; | |
638 | pos = mgmt->u.probe_req.variable; | |
639 | if (pos[0] != WLAN_EID_SSID || | |
640 | pos + 2 + pos[1] > end) { | |
641 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
642 | printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq " | |
643 | "from %pM\n", | |
644 | sdata->dev->name, mgmt->sa); | |
645 | #endif | |
646 | return; | |
647 | } | |
648 | if (pos[1] != 0 && | |
649 | (pos[1] != ifibss->ssid_len || | |
0da780c2 | 650 | memcmp(pos + 2, ifibss->ssid, ifibss->ssid_len))) { |
46900298 JB |
651 | /* Ignore ProbeReq for foreign SSID */ |
652 | return; | |
653 | } | |
654 | ||
655 | /* Reply with ProbeResp */ | |
af8cdcd8 | 656 | skb = skb_copy(ifibss->presp, GFP_KERNEL); |
46900298 JB |
657 | if (!skb) |
658 | return; | |
659 | ||
660 | resp = (struct ieee80211_mgmt *) skb->data; | |
661 | memcpy(resp->da, mgmt->sa, ETH_ALEN); | |
662 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
663 | printk(KERN_DEBUG "%s: Sending ProbeResp to %pM\n", | |
664 | sdata->dev->name, resp->da); | |
665 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ | |
62ae67be JB |
666 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
667 | ieee80211_tx_skb(sdata, skb); | |
46900298 JB |
668 | } |
669 | ||
670 | static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata, | |
671 | struct ieee80211_mgmt *mgmt, | |
672 | size_t len, | |
673 | struct ieee80211_rx_status *rx_status) | |
674 | { | |
675 | size_t baselen; | |
676 | struct ieee802_11_elems elems; | |
677 | ||
678 | if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN)) | |
679 | return; /* ignore ProbeResp to foreign address */ | |
680 | ||
681 | baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; | |
682 | if (baselen > len) | |
683 | return; | |
684 | ||
685 | ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, | |
686 | &elems); | |
687 | ||
688 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false); | |
689 | } | |
690 | ||
691 | static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, | |
692 | struct ieee80211_mgmt *mgmt, | |
693 | size_t len, | |
694 | struct ieee80211_rx_status *rx_status) | |
695 | { | |
696 | size_t baselen; | |
697 | struct ieee802_11_elems elems; | |
698 | ||
699 | /* Process beacon from the current BSS */ | |
700 | baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt; | |
701 | if (baselen > len) | |
702 | return; | |
703 | ||
704 | ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems); | |
705 | ||
706 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, true); | |
707 | } | |
708 | ||
709 | static void ieee80211_ibss_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, | |
710 | struct sk_buff *skb) | |
711 | { | |
712 | struct ieee80211_rx_status *rx_status; | |
713 | struct ieee80211_mgmt *mgmt; | |
714 | u16 fc; | |
715 | ||
f1d58c25 | 716 | rx_status = IEEE80211_SKB_RXCB(skb); |
46900298 JB |
717 | mgmt = (struct ieee80211_mgmt *) skb->data; |
718 | fc = le16_to_cpu(mgmt->frame_control); | |
719 | ||
720 | switch (fc & IEEE80211_FCTL_STYPE) { | |
721 | case IEEE80211_STYPE_PROBE_REQ: | |
722 | ieee80211_rx_mgmt_probe_req(sdata, mgmt, skb->len); | |
723 | break; | |
724 | case IEEE80211_STYPE_PROBE_RESP: | |
725 | ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len, | |
726 | rx_status); | |
727 | break; | |
728 | case IEEE80211_STYPE_BEACON: | |
729 | ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, | |
730 | rx_status); | |
731 | break; | |
732 | case IEEE80211_STYPE_AUTH: | |
733 | ieee80211_rx_mgmt_auth_ibss(sdata, mgmt, skb->len); | |
734 | break; | |
735 | } | |
736 | ||
737 | kfree_skb(skb); | |
738 | } | |
739 | ||
740 | static void ieee80211_ibss_work(struct work_struct *work) | |
741 | { | |
742 | struct ieee80211_sub_if_data *sdata = | |
743 | container_of(work, struct ieee80211_sub_if_data, u.ibss.work); | |
744 | struct ieee80211_local *local = sdata->local; | |
745 | struct ieee80211_if_ibss *ifibss; | |
746 | struct sk_buff *skb; | |
747 | ||
5bb644a0 JB |
748 | if (WARN_ON(local->suspended)) |
749 | return; | |
750 | ||
46900298 JB |
751 | if (!netif_running(sdata->dev)) |
752 | return; | |
753 | ||
fbe9c429 | 754 | if (local->scanning) |
46900298 JB |
755 | return; |
756 | ||
757 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_ADHOC)) | |
758 | return; | |
759 | ifibss = &sdata->u.ibss; | |
760 | ||
761 | while ((skb = skb_dequeue(&ifibss->skb_queue))) | |
762 | ieee80211_ibss_rx_queued_mgmt(sdata, skb); | |
763 | ||
764 | if (!test_and_clear_bit(IEEE80211_IBSS_REQ_RUN, &ifibss->request)) | |
765 | return; | |
766 | ||
767 | switch (ifibss->state) { | |
768 | case IEEE80211_IBSS_MLME_SEARCH: | |
769 | ieee80211_sta_find_ibss(sdata); | |
770 | break; | |
771 | case IEEE80211_IBSS_MLME_JOINED: | |
772 | ieee80211_sta_merge_ibss(sdata); | |
773 | break; | |
774 | default: | |
775 | WARN_ON(1); | |
776 | break; | |
777 | } | |
778 | } | |
779 | ||
780 | static void ieee80211_ibss_timer(unsigned long data) | |
781 | { | |
782 | struct ieee80211_sub_if_data *sdata = | |
783 | (struct ieee80211_sub_if_data *) data; | |
784 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
785 | struct ieee80211_local *local = sdata->local; | |
786 | ||
5bb644a0 JB |
787 | if (local->quiescing) { |
788 | ifibss->timer_running = true; | |
789 | return; | |
790 | } | |
791 | ||
46900298 | 792 | set_bit(IEEE80211_IBSS_REQ_RUN, &ifibss->request); |
42935eca | 793 | ieee80211_queue_work(&local->hw, &ifibss->work); |
46900298 JB |
794 | } |
795 | ||
5bb644a0 JB |
796 | #ifdef CONFIG_PM |
797 | void ieee80211_ibss_quiesce(struct ieee80211_sub_if_data *sdata) | |
798 | { | |
799 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
800 | ||
801 | cancel_work_sync(&ifibss->work); | |
802 | if (del_timer_sync(&ifibss->timer)) | |
803 | ifibss->timer_running = true; | |
804 | } | |
805 | ||
806 | void ieee80211_ibss_restart(struct ieee80211_sub_if_data *sdata) | |
807 | { | |
808 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
809 | ||
810 | if (ifibss->timer_running) { | |
811 | add_timer(&ifibss->timer); | |
812 | ifibss->timer_running = false; | |
813 | } | |
814 | } | |
815 | #endif | |
816 | ||
46900298 JB |
817 | void ieee80211_ibss_setup_sdata(struct ieee80211_sub_if_data *sdata) |
818 | { | |
819 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
820 | ||
821 | INIT_WORK(&ifibss->work, ieee80211_ibss_work); | |
822 | setup_timer(&ifibss->timer, ieee80211_ibss_timer, | |
823 | (unsigned long) sdata); | |
824 | skb_queue_head_init(&ifibss->skb_queue); | |
46900298 JB |
825 | } |
826 | ||
827 | /* scan finished notification */ | |
828 | void ieee80211_ibss_notify_scan_completed(struct ieee80211_local *local) | |
829 | { | |
af8cdcd8 | 830 | struct ieee80211_sub_if_data *sdata; |
46900298 | 831 | |
29b4a4f7 JB |
832 | mutex_lock(&local->iflist_mtx); |
833 | list_for_each_entry(sdata, &local->interfaces, list) { | |
0e41f715 JB |
834 | if (!netif_running(sdata->dev)) |
835 | continue; | |
af8cdcd8 JB |
836 | if (sdata->vif.type != NL80211_IFTYPE_ADHOC) |
837 | continue; | |
0e41f715 JB |
838 | if (!sdata->u.ibss.ssid_len) |
839 | continue; | |
af8cdcd8 | 840 | sdata->u.ibss.last_scan_completed = jiffies; |
51f98f13 | 841 | mod_timer(&sdata->u.ibss.timer, 0); |
46900298 | 842 | } |
29b4a4f7 | 843 | mutex_unlock(&local->iflist_mtx); |
46900298 JB |
844 | } |
845 | ||
846 | ieee80211_rx_result | |
f1d58c25 | 847 | ieee80211_ibss_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb) |
46900298 JB |
848 | { |
849 | struct ieee80211_local *local = sdata->local; | |
850 | struct ieee80211_mgmt *mgmt; | |
851 | u16 fc; | |
852 | ||
853 | if (skb->len < 24) | |
854 | return RX_DROP_MONITOR; | |
855 | ||
856 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
857 | fc = le16_to_cpu(mgmt->frame_control); | |
858 | ||
859 | switch (fc & IEEE80211_FCTL_STYPE) { | |
860 | case IEEE80211_STYPE_PROBE_RESP: | |
861 | case IEEE80211_STYPE_BEACON: | |
46900298 JB |
862 | case IEEE80211_STYPE_PROBE_REQ: |
863 | case IEEE80211_STYPE_AUTH: | |
864 | skb_queue_tail(&sdata->u.ibss.skb_queue, skb); | |
42935eca | 865 | ieee80211_queue_work(&local->hw, &sdata->u.ibss.work); |
46900298 JB |
866 | return RX_QUEUED; |
867 | } | |
868 | ||
869 | return RX_DROP_MONITOR; | |
870 | } | |
af8cdcd8 JB |
871 | |
872 | int ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata, | |
873 | struct cfg80211_ibss_params *params) | |
874 | { | |
875 | struct sk_buff *skb; | |
876 | ||
af8cdcd8 JB |
877 | if (params->bssid) { |
878 | memcpy(sdata->u.ibss.bssid, params->bssid, ETH_ALEN); | |
879 | sdata->u.ibss.fixed_bssid = true; | |
880 | } else | |
881 | sdata->u.ibss.fixed_bssid = false; | |
882 | ||
fffd0934 JB |
883 | sdata->u.ibss.privacy = params->privacy; |
884 | ||
57c4d7b4 JB |
885 | sdata->vif.bss_conf.beacon_int = params->beacon_interval; |
886 | ||
af8cdcd8 JB |
887 | sdata->u.ibss.channel = params->channel; |
888 | sdata->u.ibss.fixed_channel = params->channel_fixed; | |
889 | ||
890 | if (params->ie) { | |
891 | sdata->u.ibss.ie = kmemdup(params->ie, params->ie_len, | |
892 | GFP_KERNEL); | |
893 | if (sdata->u.ibss.ie) | |
894 | sdata->u.ibss.ie_len = params->ie_len; | |
895 | } | |
896 | ||
897 | skb = dev_alloc_skb(sdata->local->hw.extra_tx_headroom + | |
898 | 36 /* bitrates */ + | |
899 | 34 /* SSID */ + | |
900 | 3 /* DS params */ + | |
901 | 4 /* IBSS params */ + | |
902 | params->ie_len); | |
903 | if (!skb) | |
904 | return -ENOMEM; | |
905 | ||
906 | sdata->u.ibss.skb = skb; | |
907 | sdata->u.ibss.state = IEEE80211_IBSS_MLME_SEARCH; | |
908 | sdata->u.ibss.ibss_join_req = jiffies; | |
909 | ||
0e41f715 JB |
910 | memcpy(sdata->u.ibss.ssid, params->ssid, IEEE80211_MAX_SSID_LEN); |
911 | ||
912 | /* | |
913 | * The ssid_len setting below is used to see whether | |
914 | * we are active, and we need all other settings | |
915 | * before that may get visible. | |
916 | */ | |
917 | mb(); | |
918 | ||
919 | sdata->u.ibss.ssid_len = params->ssid_len; | |
920 | ||
5cff20e6 JB |
921 | ieee80211_recalc_idle(sdata->local); |
922 | ||
af8cdcd8 | 923 | set_bit(IEEE80211_IBSS_REQ_RUN, &sdata->u.ibss.request); |
42935eca | 924 | ieee80211_queue_work(&sdata->local->hw, &sdata->u.ibss.work); |
af8cdcd8 JB |
925 | |
926 | return 0; | |
927 | } | |
928 | ||
929 | int ieee80211_ibss_leave(struct ieee80211_sub_if_data *sdata) | |
930 | { | |
931 | struct sk_buff *skb; | |
932 | ||
933 | del_timer_sync(&sdata->u.ibss.timer); | |
934 | clear_bit(IEEE80211_IBSS_REQ_RUN, &sdata->u.ibss.request); | |
935 | cancel_work_sync(&sdata->u.ibss.work); | |
936 | clear_bit(IEEE80211_IBSS_REQ_RUN, &sdata->u.ibss.request); | |
937 | ||
938 | sta_info_flush(sdata->local, sdata); | |
939 | ||
940 | /* remove beacon */ | |
941 | kfree(sdata->u.ibss.ie); | |
942 | skb = sdata->u.ibss.presp; | |
943 | rcu_assign_pointer(sdata->u.ibss.presp, NULL); | |
2d0ddec5 | 944 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON_ENABLED); |
af8cdcd8 JB |
945 | synchronize_rcu(); |
946 | kfree_skb(skb); | |
947 | ||
948 | skb_queue_purge(&sdata->u.ibss.skb_queue); | |
949 | memset(sdata->u.ibss.bssid, 0, ETH_ALEN); | |
5cff20e6 JB |
950 | sdata->u.ibss.ssid_len = 0; |
951 | ||
952 | ieee80211_recalc_idle(sdata->local); | |
af8cdcd8 JB |
953 | |
954 | return 0; | |
955 | } |