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Commit | Line | Data |
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f0706e82 JB |
1 | /* |
2 | * BSS client mode implementation | |
5394af4d | 3 | * Copyright 2003-2008, Jouni Malinen <j@w1.fi> |
f0706e82 JB |
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 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License version 2 as | |
11 | * published by the Free Software Foundation. | |
12 | */ | |
13 | ||
5b323edb | 14 | #include <linux/delay.h> |
f0706e82 JB |
15 | #include <linux/if_ether.h> |
16 | #include <linux/skbuff.h> | |
f0706e82 | 17 | #include <linux/if_arp.h> |
f0706e82 | 18 | #include <linux/etherdevice.h> |
d0709a65 | 19 | #include <linux/rtnetlink.h> |
10f644a4 | 20 | #include <linux/pm_qos_params.h> |
d91f36db | 21 | #include <linux/crc32.h> |
f0706e82 | 22 | #include <net/mac80211.h> |
472dbc45 | 23 | #include <asm/unaligned.h> |
60f8b39c | 24 | |
f0706e82 | 25 | #include "ieee80211_i.h" |
24487981 | 26 | #include "driver-ops.h" |
2c8dccc7 JB |
27 | #include "rate.h" |
28 | #include "led.h" | |
f0706e82 | 29 | |
a43abf29 | 30 | #define IEEE80211_MAX_PROBE_TRIES 5 |
b291ba11 JB |
31 | |
32 | /* | |
33 | * beacon loss detection timeout | |
34 | * XXX: should depend on beacon interval | |
35 | */ | |
36 | #define IEEE80211_BEACON_LOSS_TIME (2 * HZ) | |
37 | /* | |
38 | * Time the connection can be idle before we probe | |
39 | * it to see if we can still talk to the AP. | |
40 | */ | |
d1c5091f | 41 | #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ) |
b291ba11 JB |
42 | /* |
43 | * Time we wait for a probe response after sending | |
44 | * a probe request because of beacon loss or for | |
45 | * checking the connection still works. | |
46 | */ | |
d1c5091f | 47 | #define IEEE80211_PROBE_WAIT (HZ / 2) |
f0706e82 | 48 | |
17e4ec14 JM |
49 | /* |
50 | * Weight given to the latest Beacon frame when calculating average signal | |
51 | * strength for Beacon frames received in the current BSS. This must be | |
52 | * between 1 and 15. | |
53 | */ | |
54 | #define IEEE80211_SIGNAL_AVE_WEIGHT 3 | |
55 | ||
5bb644a0 JB |
56 | #define TMR_RUNNING_TIMER 0 |
57 | #define TMR_RUNNING_CHANSW 1 | |
58 | ||
77fdaa12 JB |
59 | /* |
60 | * All cfg80211 functions have to be called outside a locked | |
61 | * section so that they can acquire a lock themselves... This | |
62 | * is much simpler than queuing up things in cfg80211, but we | |
63 | * do need some indirection for that here. | |
64 | */ | |
65 | enum rx_mgmt_action { | |
66 | /* no action required */ | |
67 | RX_MGMT_NONE, | |
68 | ||
69 | /* caller must call cfg80211_send_rx_auth() */ | |
70 | RX_MGMT_CFG80211_AUTH, | |
71 | ||
72 | /* caller must call cfg80211_send_rx_assoc() */ | |
73 | RX_MGMT_CFG80211_ASSOC, | |
74 | ||
75 | /* caller must call cfg80211_send_deauth() */ | |
76 | RX_MGMT_CFG80211_DEAUTH, | |
77 | ||
78 | /* caller must call cfg80211_send_disassoc() */ | |
79 | RX_MGMT_CFG80211_DISASSOC, | |
80 | ||
5d1ec85f JB |
81 | /* caller must tell cfg80211 about internal error */ |
82 | RX_MGMT_CFG80211_ASSOC_ERROR, | |
77fdaa12 JB |
83 | }; |
84 | ||
5484e237 | 85 | /* utils */ |
77fdaa12 JB |
86 | static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd) |
87 | { | |
88 | WARN_ON(!mutex_is_locked(&ifmgd->mtx)); | |
89 | } | |
90 | ||
ca386f31 JB |
91 | /* |
92 | * We can have multiple work items (and connection probing) | |
93 | * scheduling this timer, but we need to take care to only | |
94 | * reschedule it when it should fire _earlier_ than it was | |
95 | * asked for before, or if it's not pending right now. This | |
96 | * function ensures that. Note that it then is required to | |
97 | * run this function for all timeouts after the first one | |
98 | * has happened -- the work that runs from this timer will | |
99 | * do that. | |
100 | */ | |
101 | static void run_again(struct ieee80211_if_managed *ifmgd, | |
102 | unsigned long timeout) | |
103 | { | |
104 | ASSERT_MGD_MTX(ifmgd); | |
105 | ||
106 | if (!timer_pending(&ifmgd->timer) || | |
107 | time_before(timeout, ifmgd->timer.expires)) | |
108 | mod_timer(&ifmgd->timer, timeout); | |
109 | } | |
110 | ||
b291ba11 JB |
111 | static void mod_beacon_timer(struct ieee80211_sub_if_data *sdata) |
112 | { | |
113 | if (sdata->local->hw.flags & IEEE80211_HW_BEACON_FILTER) | |
114 | return; | |
115 | ||
116 | mod_timer(&sdata->u.mgd.bcn_mon_timer, | |
117 | round_jiffies_up(jiffies + IEEE80211_BEACON_LOSS_TIME)); | |
118 | } | |
119 | ||
5484e237 | 120 | static int ecw2cw(int ecw) |
60f8b39c | 121 | { |
5484e237 | 122 | return (1 << ecw) - 1; |
60f8b39c JB |
123 | } |
124 | ||
d5522e03 JB |
125 | /* |
126 | * ieee80211_enable_ht should be called only after the operating band | |
127 | * has been determined as ht configuration depends on the hw's | |
128 | * HT abilities for a specific band. | |
129 | */ | |
130 | static u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata, | |
131 | struct ieee80211_ht_info *hti, | |
77fdaa12 | 132 | const u8 *bssid, u16 ap_ht_cap_flags) |
d5522e03 JB |
133 | { |
134 | struct ieee80211_local *local = sdata->local; | |
135 | struct ieee80211_supported_band *sband; | |
d5522e03 JB |
136 | struct sta_info *sta; |
137 | u32 changed = 0; | |
9ed6bcce | 138 | u16 ht_opmode; |
d5522e03 JB |
139 | bool enable_ht = true, ht_changed; |
140 | enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT; | |
141 | ||
142 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
143 | ||
d5522e03 JB |
144 | /* HT is not supported */ |
145 | if (!sband->ht_cap.ht_supported) | |
146 | enable_ht = false; | |
147 | ||
148 | /* check that channel matches the right operating channel */ | |
149 | if (local->hw.conf.channel->center_freq != | |
150 | ieee80211_channel_to_frequency(hti->control_chan)) | |
151 | enable_ht = false; | |
152 | ||
153 | if (enable_ht) { | |
154 | channel_type = NL80211_CHAN_HT20; | |
155 | ||
156 | if (!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) && | |
157 | (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) && | |
158 | (hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) { | |
159 | switch(hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { | |
160 | case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: | |
768777ea LR |
161 | if (!(local->hw.conf.channel->flags & |
162 | IEEE80211_CHAN_NO_HT40PLUS)) | |
163 | channel_type = NL80211_CHAN_HT40PLUS; | |
d5522e03 JB |
164 | break; |
165 | case IEEE80211_HT_PARAM_CHA_SEC_BELOW: | |
768777ea LR |
166 | if (!(local->hw.conf.channel->flags & |
167 | IEEE80211_CHAN_NO_HT40MINUS)) | |
168 | channel_type = NL80211_CHAN_HT40MINUS; | |
d5522e03 JB |
169 | break; |
170 | } | |
171 | } | |
172 | } | |
173 | ||
174 | ht_changed = conf_is_ht(&local->hw.conf) != enable_ht || | |
175 | channel_type != local->hw.conf.channel_type; | |
176 | ||
177 | local->oper_channel_type = channel_type; | |
178 | ||
179 | if (ht_changed) { | |
180 | /* channel_type change automatically detected */ | |
181 | ieee80211_hw_config(local, 0); | |
182 | ||
183 | rcu_read_lock(); | |
abe60632 | 184 | sta = sta_info_get(sdata, bssid); |
d5522e03 JB |
185 | if (sta) |
186 | rate_control_rate_update(local, sband, sta, | |
4fa00437 S |
187 | IEEE80211_RC_HT_CHANGED, |
188 | local->oper_channel_type); | |
d5522e03 | 189 | rcu_read_unlock(); |
d5522e03 JB |
190 | } |
191 | ||
192 | /* disable HT */ | |
193 | if (!enable_ht) | |
194 | return 0; | |
195 | ||
9ed6bcce | 196 | ht_opmode = le16_to_cpu(hti->operation_mode); |
d5522e03 JB |
197 | |
198 | /* if bss configuration changed store the new one */ | |
413ad50a JB |
199 | if (!sdata->ht_opmode_valid || |
200 | sdata->vif.bss_conf.ht_operation_mode != ht_opmode) { | |
d5522e03 | 201 | changed |= BSS_CHANGED_HT; |
9ed6bcce | 202 | sdata->vif.bss_conf.ht_operation_mode = ht_opmode; |
413ad50a | 203 | sdata->ht_opmode_valid = true; |
d5522e03 JB |
204 | } |
205 | ||
206 | return changed; | |
207 | } | |
208 | ||
9c6bd790 JB |
209 | /* frame sending functions */ |
210 | ||
ef422bc0 | 211 | static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata, |
667503dd JB |
212 | const u8 *bssid, u16 stype, u16 reason, |
213 | void *cookie) | |
9ac19a90 JB |
214 | { |
215 | struct ieee80211_local *local = sdata->local; | |
46900298 | 216 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
9ac19a90 JB |
217 | struct sk_buff *skb; |
218 | struct ieee80211_mgmt *mgmt; | |
9aed3cc1 | 219 | |
65fc73ac | 220 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt)); |
9ac19a90 | 221 | if (!skb) { |
ef422bc0 | 222 | printk(KERN_DEBUG "%s: failed to allocate buffer for " |
47846c9b | 223 | "deauth/disassoc frame\n", sdata->name); |
9ac19a90 JB |
224 | return; |
225 | } | |
226 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
227 | ||
228 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
229 | memset(mgmt, 0, 24); | |
77fdaa12 | 230 | memcpy(mgmt->da, bssid, ETH_ALEN); |
47846c9b | 231 | memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); |
77fdaa12 | 232 | memcpy(mgmt->bssid, bssid, ETH_ALEN); |
ef422bc0 | 233 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype); |
9ac19a90 | 234 | skb_put(skb, 2); |
ef422bc0 | 235 | /* u.deauth.reason_code == u.disassoc.reason_code */ |
9ac19a90 JB |
236 | mgmt->u.deauth.reason_code = cpu_to_le16(reason); |
237 | ||
53b46b84 | 238 | if (stype == IEEE80211_STYPE_DEAUTH) |
ce470613 HS |
239 | if (cookie) |
240 | __cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len); | |
241 | else | |
242 | cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len); | |
53b46b84 | 243 | else |
ce470613 HS |
244 | if (cookie) |
245 | __cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len); | |
246 | else | |
247 | cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len); | |
62ae67be JB |
248 | if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED)) |
249 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; | |
250 | ieee80211_tx_skb(sdata, skb); | |
9ac19a90 JB |
251 | } |
252 | ||
572e0012 KV |
253 | void ieee80211_send_pspoll(struct ieee80211_local *local, |
254 | struct ieee80211_sub_if_data *sdata) | |
255 | { | |
572e0012 KV |
256 | struct ieee80211_pspoll *pspoll; |
257 | struct sk_buff *skb; | |
572e0012 | 258 | |
d8cd189e KV |
259 | skb = ieee80211_pspoll_get(&local->hw, &sdata->vif); |
260 | if (!skb) | |
572e0012 | 261 | return; |
572e0012 | 262 | |
d8cd189e KV |
263 | pspoll = (struct ieee80211_pspoll *) skb->data; |
264 | pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); | |
572e0012 | 265 | |
62ae67be JB |
266 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
267 | ieee80211_tx_skb(sdata, skb); | |
572e0012 KV |
268 | } |
269 | ||
965bedad JB |
270 | void ieee80211_send_nullfunc(struct ieee80211_local *local, |
271 | struct ieee80211_sub_if_data *sdata, | |
272 | int powersave) | |
273 | { | |
274 | struct sk_buff *skb; | |
d8cd189e | 275 | struct ieee80211_hdr_3addr *nullfunc; |
965bedad | 276 | |
d8cd189e KV |
277 | skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif); |
278 | if (!skb) | |
965bedad | 279 | return; |
965bedad | 280 | |
d8cd189e | 281 | nullfunc = (struct ieee80211_hdr_3addr *) skb->data; |
965bedad | 282 | if (powersave) |
d8cd189e | 283 | nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); |
965bedad | 284 | |
62ae67be JB |
285 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
286 | ieee80211_tx_skb(sdata, skb); | |
965bedad JB |
287 | } |
288 | ||
d524215f FF |
289 | static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local, |
290 | struct ieee80211_sub_if_data *sdata) | |
291 | { | |
292 | struct sk_buff *skb; | |
293 | struct ieee80211_hdr *nullfunc; | |
294 | __le16 fc; | |
295 | ||
296 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) | |
297 | return; | |
298 | ||
299 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30); | |
300 | if (!skb) { | |
301 | printk(KERN_DEBUG "%s: failed to allocate buffer for 4addr " | |
302 | "nullfunc frame\n", sdata->name); | |
303 | return; | |
304 | } | |
305 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
306 | ||
307 | nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30); | |
308 | memset(nullfunc, 0, 30); | |
309 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | | |
310 | IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); | |
311 | nullfunc->frame_control = fc; | |
312 | memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN); | |
313 | memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); | |
314 | memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN); | |
315 | memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN); | |
316 | ||
317 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; | |
318 | ieee80211_tx_skb(sdata, skb); | |
319 | } | |
320 | ||
cc32abd4 JB |
321 | /* spectrum management related things */ |
322 | static void ieee80211_chswitch_work(struct work_struct *work) | |
323 | { | |
324 | struct ieee80211_sub_if_data *sdata = | |
325 | container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work); | |
cc32abd4 JB |
326 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
327 | ||
9607e6b6 | 328 | if (!ieee80211_sdata_running(sdata)) |
cc32abd4 JB |
329 | return; |
330 | ||
77fdaa12 JB |
331 | mutex_lock(&ifmgd->mtx); |
332 | if (!ifmgd->associated) | |
333 | goto out; | |
cc32abd4 JB |
334 | |
335 | sdata->local->oper_channel = sdata->local->csa_channel; | |
77fdaa12 JB |
336 | ieee80211_hw_config(sdata->local, IEEE80211_CONF_CHANGE_CHANNEL); |
337 | ||
cc32abd4 | 338 | /* XXX: shouldn't really modify cfg80211-owned data! */ |
0c1ad2ca | 339 | ifmgd->associated->channel = sdata->local->oper_channel; |
cc32abd4 | 340 | |
cc32abd4 JB |
341 | ieee80211_wake_queues_by_reason(&sdata->local->hw, |
342 | IEEE80211_QUEUE_STOP_REASON_CSA); | |
77fdaa12 JB |
343 | out: |
344 | ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED; | |
345 | mutex_unlock(&ifmgd->mtx); | |
cc32abd4 JB |
346 | } |
347 | ||
348 | static void ieee80211_chswitch_timer(unsigned long data) | |
349 | { | |
350 | struct ieee80211_sub_if_data *sdata = | |
351 | (struct ieee80211_sub_if_data *) data; | |
352 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
353 | ||
5bb644a0 JB |
354 | if (sdata->local->quiescing) { |
355 | set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running); | |
356 | return; | |
357 | } | |
358 | ||
42935eca | 359 | ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work); |
cc32abd4 JB |
360 | } |
361 | ||
362 | void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata, | |
363 | struct ieee80211_channel_sw_ie *sw_elem, | |
364 | struct ieee80211_bss *bss) | |
365 | { | |
0c1ad2ca JB |
366 | struct cfg80211_bss *cbss = |
367 | container_of((void *)bss, struct cfg80211_bss, priv); | |
cc32abd4 JB |
368 | struct ieee80211_channel *new_ch; |
369 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
370 | int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num); | |
371 | ||
77fdaa12 JB |
372 | ASSERT_MGD_MTX(ifmgd); |
373 | ||
374 | if (!ifmgd->associated) | |
cc32abd4 JB |
375 | return; |
376 | ||
fbe9c429 | 377 | if (sdata->local->scanning) |
cc32abd4 JB |
378 | return; |
379 | ||
380 | /* Disregard subsequent beacons if we are already running a timer | |
381 | processing a CSA */ | |
382 | ||
383 | if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED) | |
384 | return; | |
385 | ||
386 | new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq); | |
387 | if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED) | |
388 | return; | |
389 | ||
390 | sdata->local->csa_channel = new_ch; | |
391 | ||
392 | if (sw_elem->count <= 1) { | |
42935eca | 393 | ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work); |
cc32abd4 JB |
394 | } else { |
395 | ieee80211_stop_queues_by_reason(&sdata->local->hw, | |
396 | IEEE80211_QUEUE_STOP_REASON_CSA); | |
397 | ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED; | |
398 | mod_timer(&ifmgd->chswitch_timer, | |
399 | jiffies + | |
400 | msecs_to_jiffies(sw_elem->count * | |
0c1ad2ca | 401 | cbss->beacon_interval)); |
cc32abd4 JB |
402 | } |
403 | } | |
404 | ||
405 | static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata, | |
406 | u16 capab_info, u8 *pwr_constr_elem, | |
407 | u8 pwr_constr_elem_len) | |
408 | { | |
409 | struct ieee80211_conf *conf = &sdata->local->hw.conf; | |
410 | ||
411 | if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT)) | |
412 | return; | |
413 | ||
414 | /* Power constraint IE length should be 1 octet */ | |
415 | if (pwr_constr_elem_len != 1) | |
416 | return; | |
417 | ||
418 | if ((*pwr_constr_elem <= conf->channel->max_power) && | |
419 | (*pwr_constr_elem != sdata->local->power_constr_level)) { | |
420 | sdata->local->power_constr_level = *pwr_constr_elem; | |
421 | ieee80211_hw_config(sdata->local, 0); | |
422 | } | |
423 | } | |
424 | ||
965bedad JB |
425 | /* powersave */ |
426 | static void ieee80211_enable_ps(struct ieee80211_local *local, | |
427 | struct ieee80211_sub_if_data *sdata) | |
428 | { | |
429 | struct ieee80211_conf *conf = &local->hw.conf; | |
430 | ||
d5edaedc JB |
431 | /* |
432 | * If we are scanning right now then the parameters will | |
433 | * take effect when scan finishes. | |
434 | */ | |
fbe9c429 | 435 | if (local->scanning) |
d5edaedc JB |
436 | return; |
437 | ||
965bedad JB |
438 | if (conf->dynamic_ps_timeout > 0 && |
439 | !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) { | |
440 | mod_timer(&local->dynamic_ps_timer, jiffies + | |
441 | msecs_to_jiffies(conf->dynamic_ps_timeout)); | |
442 | } else { | |
443 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) | |
444 | ieee80211_send_nullfunc(local, sdata, 1); | |
375177bf VN |
445 | |
446 | if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) { | |
447 | conf->flags |= IEEE80211_CONF_PS; | |
448 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); | |
449 | } | |
965bedad JB |
450 | } |
451 | } | |
452 | ||
453 | static void ieee80211_change_ps(struct ieee80211_local *local) | |
454 | { | |
455 | struct ieee80211_conf *conf = &local->hw.conf; | |
456 | ||
457 | if (local->ps_sdata) { | |
965bedad JB |
458 | ieee80211_enable_ps(local, local->ps_sdata); |
459 | } else if (conf->flags & IEEE80211_CONF_PS) { | |
460 | conf->flags &= ~IEEE80211_CONF_PS; | |
461 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); | |
462 | del_timer_sync(&local->dynamic_ps_timer); | |
463 | cancel_work_sync(&local->dynamic_ps_enable_work); | |
464 | } | |
465 | } | |
466 | ||
467 | /* need to hold RTNL or interface lock */ | |
10f644a4 | 468 | void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency) |
965bedad JB |
469 | { |
470 | struct ieee80211_sub_if_data *sdata, *found = NULL; | |
471 | int count = 0; | |
472 | ||
473 | if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) { | |
474 | local->ps_sdata = NULL; | |
475 | return; | |
476 | } | |
477 | ||
af6b6374 JB |
478 | if (!list_empty(&local->work_list)) { |
479 | local->ps_sdata = NULL; | |
480 | goto change; | |
481 | } | |
482 | ||
965bedad | 483 | list_for_each_entry(sdata, &local->interfaces, list) { |
9607e6b6 | 484 | if (!ieee80211_sdata_running(sdata)) |
965bedad JB |
485 | continue; |
486 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
487 | continue; | |
488 | found = sdata; | |
489 | count++; | |
490 | } | |
491 | ||
43f78531 | 492 | if (count == 1 && found->u.mgd.powersave && |
af6b6374 | 493 | found->u.mgd.associated && |
56007a02 | 494 | found->u.mgd.associated->beacon_ies && |
b291ba11 JB |
495 | !(found->u.mgd.flags & (IEEE80211_STA_BEACON_POLL | |
496 | IEEE80211_STA_CONNECTION_POLL))) { | |
10f644a4 JB |
497 | s32 beaconint_us; |
498 | ||
499 | if (latency < 0) | |
500 | latency = pm_qos_requirement(PM_QOS_NETWORK_LATENCY); | |
501 | ||
502 | beaconint_us = ieee80211_tu_to_usec( | |
503 | found->vif.bss_conf.beacon_int); | |
504 | ||
04fe2037 | 505 | if (beaconint_us > latency) { |
10f644a4 | 506 | local->ps_sdata = NULL; |
04fe2037 | 507 | } else { |
56007a02 | 508 | struct ieee80211_bss *bss; |
04fe2037 | 509 | int maxslp = 1; |
56007a02 | 510 | u8 dtimper; |
04fe2037 | 511 | |
56007a02 JB |
512 | bss = (void *)found->u.mgd.associated->priv; |
513 | dtimper = bss->dtim_period; | |
514 | ||
515 | /* If the TIM IE is invalid, pretend the value is 1 */ | |
516 | if (!dtimper) | |
517 | dtimper = 1; | |
518 | else if (dtimper > 1) | |
04fe2037 JB |
519 | maxslp = min_t(int, dtimper, |
520 | latency / beaconint_us); | |
521 | ||
9ccebe61 | 522 | local->hw.conf.max_sleep_period = maxslp; |
56007a02 | 523 | local->hw.conf.ps_dtim_period = dtimper; |
10f644a4 | 524 | local->ps_sdata = found; |
04fe2037 | 525 | } |
10f644a4 | 526 | } else { |
965bedad | 527 | local->ps_sdata = NULL; |
10f644a4 | 528 | } |
965bedad | 529 | |
af6b6374 | 530 | change: |
965bedad JB |
531 | ieee80211_change_ps(local); |
532 | } | |
533 | ||
534 | void ieee80211_dynamic_ps_disable_work(struct work_struct *work) | |
535 | { | |
536 | struct ieee80211_local *local = | |
537 | container_of(work, struct ieee80211_local, | |
538 | dynamic_ps_disable_work); | |
539 | ||
540 | if (local->hw.conf.flags & IEEE80211_CONF_PS) { | |
541 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; | |
542 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); | |
543 | } | |
544 | ||
545 | ieee80211_wake_queues_by_reason(&local->hw, | |
546 | IEEE80211_QUEUE_STOP_REASON_PS); | |
547 | } | |
548 | ||
549 | void ieee80211_dynamic_ps_enable_work(struct work_struct *work) | |
550 | { | |
551 | struct ieee80211_local *local = | |
552 | container_of(work, struct ieee80211_local, | |
553 | dynamic_ps_enable_work); | |
554 | struct ieee80211_sub_if_data *sdata = local->ps_sdata; | |
375177bf | 555 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
965bedad JB |
556 | |
557 | /* can only happen when PS was just disabled anyway */ | |
558 | if (!sdata) | |
559 | return; | |
560 | ||
561 | if (local->hw.conf.flags & IEEE80211_CONF_PS) | |
562 | return; | |
563 | ||
375177bf VN |
564 | if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) && |
565 | (!(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED))) | |
965bedad JB |
566 | ieee80211_send_nullfunc(local, sdata, 1); |
567 | ||
375177bf VN |
568 | if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) || |
569 | (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { | |
570 | ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; | |
571 | local->hw.conf.flags |= IEEE80211_CONF_PS; | |
572 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); | |
573 | } | |
965bedad JB |
574 | } |
575 | ||
576 | void ieee80211_dynamic_ps_timer(unsigned long data) | |
577 | { | |
578 | struct ieee80211_local *local = (void *) data; | |
579 | ||
78f1a8b7 | 580 | if (local->quiescing || local->suspended) |
5bb644a0 JB |
581 | return; |
582 | ||
42935eca | 583 | ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work); |
965bedad JB |
584 | } |
585 | ||
60f8b39c | 586 | /* MLME */ |
f698d856 | 587 | static void ieee80211_sta_wmm_params(struct ieee80211_local *local, |
46900298 | 588 | struct ieee80211_if_managed *ifmgd, |
f0706e82 JB |
589 | u8 *wmm_param, size_t wmm_param_len) |
590 | { | |
f0706e82 JB |
591 | struct ieee80211_tx_queue_params params; |
592 | size_t left; | |
593 | int count; | |
ab13315a | 594 | u8 *pos, uapsd_queues = 0; |
f0706e82 | 595 | |
e1b3ec1a SG |
596 | if (!local->ops->conf_tx) |
597 | return; | |
598 | ||
af6b6374 | 599 | if (local->hw.queues < 4) |
3434fbd3 JB |
600 | return; |
601 | ||
602 | if (!wmm_param) | |
603 | return; | |
604 | ||
f0706e82 JB |
605 | if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) |
606 | return; | |
ab13315a KV |
607 | |
608 | if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) | |
50ae0cf1 | 609 | uapsd_queues = local->uapsd_queues; |
ab13315a | 610 | |
f0706e82 | 611 | count = wmm_param[6] & 0x0f; |
46900298 | 612 | if (count == ifmgd->wmm_last_param_set) |
f0706e82 | 613 | return; |
46900298 | 614 | ifmgd->wmm_last_param_set = count; |
f0706e82 JB |
615 | |
616 | pos = wmm_param + 8; | |
617 | left = wmm_param_len - 8; | |
618 | ||
619 | memset(¶ms, 0, sizeof(params)); | |
620 | ||
f0706e82 JB |
621 | local->wmm_acm = 0; |
622 | for (; left >= 4; left -= 4, pos += 4) { | |
623 | int aci = (pos[0] >> 5) & 0x03; | |
624 | int acm = (pos[0] >> 4) & 0x01; | |
ab13315a | 625 | bool uapsd = false; |
f0706e82 JB |
626 | int queue; |
627 | ||
628 | switch (aci) { | |
0eeb59fe | 629 | case 1: /* AC_BK */ |
e100bb64 | 630 | queue = 3; |
988c0f72 | 631 | if (acm) |
0eeb59fe | 632 | local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ |
ab13315a KV |
633 | if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) |
634 | uapsd = true; | |
f0706e82 | 635 | break; |
0eeb59fe | 636 | case 2: /* AC_VI */ |
e100bb64 | 637 | queue = 1; |
988c0f72 | 638 | if (acm) |
0eeb59fe | 639 | local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ |
ab13315a KV |
640 | if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) |
641 | uapsd = true; | |
f0706e82 | 642 | break; |
0eeb59fe | 643 | case 3: /* AC_VO */ |
e100bb64 | 644 | queue = 0; |
988c0f72 | 645 | if (acm) |
0eeb59fe | 646 | local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ |
ab13315a KV |
647 | if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) |
648 | uapsd = true; | |
f0706e82 | 649 | break; |
0eeb59fe | 650 | case 0: /* AC_BE */ |
f0706e82 | 651 | default: |
e100bb64 | 652 | queue = 2; |
988c0f72 | 653 | if (acm) |
0eeb59fe | 654 | local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ |
ab13315a KV |
655 | if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) |
656 | uapsd = true; | |
f0706e82 JB |
657 | break; |
658 | } | |
659 | ||
660 | params.aifs = pos[0] & 0x0f; | |
661 | params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4); | |
662 | params.cw_min = ecw2cw(pos[1] & 0x0f); | |
f434b2d1 | 663 | params.txop = get_unaligned_le16(pos + 2); |
ab13315a KV |
664 | params.uapsd = uapsd; |
665 | ||
f4ea83dd | 666 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
f0706e82 | 667 | printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d " |
ab13315a | 668 | "cWmin=%d cWmax=%d txop=%d uapsd=%d\n", |
0bffe40f | 669 | wiphy_name(local->hw.wiphy), queue, aci, acm, |
ab13315a KV |
670 | params.aifs, params.cw_min, params.cw_max, params.txop, |
671 | params.uapsd); | |
3330d7be | 672 | #endif |
e1b3ec1a | 673 | if (drv_conf_tx(local, queue, ¶ms)) |
f0706e82 | 674 | printk(KERN_DEBUG "%s: failed to set TX queue " |
0bffe40f JB |
675 | "parameters for queue %d\n", |
676 | wiphy_name(local->hw.wiphy), queue); | |
f0706e82 | 677 | } |
e1b3ec1a SG |
678 | |
679 | /* enable WMM or activate new settings */ | |
680 | local->hw.conf.flags |= IEEE80211_CONF_QOS; | |
681 | drv_config(local, IEEE80211_CONF_CHANGE_QOS); | |
f0706e82 JB |
682 | } |
683 | ||
7a5158ef JB |
684 | static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata, |
685 | u16 capab, bool erp_valid, u8 erp) | |
5628221c | 686 | { |
bda3933a | 687 | struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; |
471b3efd | 688 | u32 changed = 0; |
7a5158ef JB |
689 | bool use_protection; |
690 | bool use_short_preamble; | |
691 | bool use_short_slot; | |
692 | ||
693 | if (erp_valid) { | |
694 | use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; | |
695 | use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; | |
696 | } else { | |
697 | use_protection = false; | |
698 | use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); | |
699 | } | |
700 | ||
701 | use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); | |
43d35343 FF |
702 | if (sdata->local->hw.conf.channel->band == IEEE80211_BAND_5GHZ) |
703 | use_short_slot = true; | |
5628221c | 704 | |
471b3efd | 705 | if (use_protection != bss_conf->use_cts_prot) { |
471b3efd JB |
706 | bss_conf->use_cts_prot = use_protection; |
707 | changed |= BSS_CHANGED_ERP_CTS_PROT; | |
5628221c | 708 | } |
7e9ed188 | 709 | |
d43c7b37 | 710 | if (use_short_preamble != bss_conf->use_short_preamble) { |
d43c7b37 | 711 | bss_conf->use_short_preamble = use_short_preamble; |
471b3efd | 712 | changed |= BSS_CHANGED_ERP_PREAMBLE; |
7e9ed188 | 713 | } |
d9430a32 | 714 | |
7a5158ef | 715 | if (use_short_slot != bss_conf->use_short_slot) { |
7a5158ef JB |
716 | bss_conf->use_short_slot = use_short_slot; |
717 | changed |= BSS_CHANGED_ERP_SLOT; | |
50c4afb9 JL |
718 | } |
719 | ||
720 | return changed; | |
721 | } | |
722 | ||
f698d856 | 723 | static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, |
0c1ad2ca | 724 | struct cfg80211_bss *cbss, |
ae5eb026 | 725 | u32 bss_info_changed) |
f0706e82 | 726 | { |
0c1ad2ca | 727 | struct ieee80211_bss *bss = (void *)cbss->priv; |
471b3efd | 728 | struct ieee80211_local *local = sdata->local; |
d6f2da5b | 729 | |
ae5eb026 | 730 | bss_info_changed |= BSS_CHANGED_ASSOC; |
77fdaa12 | 731 | /* set timing information */ |
0c1ad2ca JB |
732 | sdata->vif.bss_conf.beacon_int = cbss->beacon_interval; |
733 | sdata->vif.bss_conf.timestamp = cbss->tsf; | |
5628221c | 734 | |
77fdaa12 JB |
735 | bss_info_changed |= BSS_CHANGED_BEACON_INT; |
736 | bss_info_changed |= ieee80211_handle_bss_capability(sdata, | |
0c1ad2ca | 737 | cbss->capability, bss->has_erp_value, bss->erp_value); |
21c0cbe7 | 738 | |
0c1ad2ca JB |
739 | sdata->u.mgd.associated = cbss; |
740 | memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN); | |
f0706e82 | 741 | |
17e4ec14 JM |
742 | sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE; |
743 | ||
b291ba11 JB |
744 | /* just to be sure */ |
745 | sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL | | |
746 | IEEE80211_STA_BEACON_POLL); | |
747 | ||
0183826b JB |
748 | /* |
749 | * Always handle WMM once after association regardless | |
750 | * of the first value the AP uses. Setting -1 here has | |
751 | * that effect because the AP values is an unsigned | |
752 | * 4-bit value. | |
753 | */ | |
754 | sdata->u.mgd.wmm_last_param_set = -1; | |
755 | ||
9ac19a90 | 756 | ieee80211_led_assoc(local, 1); |
9306102e | 757 | |
bda3933a | 758 | sdata->vif.bss_conf.assoc = 1; |
96dd22ac JB |
759 | /* |
760 | * For now just always ask the driver to update the basic rateset | |
761 | * when we have associated, we aren't checking whether it actually | |
762 | * changed or not. | |
763 | */ | |
ae5eb026 | 764 | bss_info_changed |= BSS_CHANGED_BASIC_RATES; |
9cef8737 JB |
765 | |
766 | /* And the BSSID changed - we're associated now */ | |
767 | bss_info_changed |= BSS_CHANGED_BSSID; | |
768 | ||
a97c13c3 JO |
769 | /* Tell the driver to monitor connection quality (if supported) */ |
770 | if ((local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI) && | |
771 | sdata->vif.bss_conf.cqm_rssi_thold) | |
772 | bss_info_changed |= BSS_CHANGED_CQM; | |
773 | ||
ae5eb026 | 774 | ieee80211_bss_info_change_notify(sdata, bss_info_changed); |
f0706e82 | 775 | |
056508dc JB |
776 | mutex_lock(&local->iflist_mtx); |
777 | ieee80211_recalc_ps(local, -1); | |
0f78231b | 778 | ieee80211_recalc_smps(local, sdata); |
056508dc | 779 | mutex_unlock(&local->iflist_mtx); |
e0cb686f | 780 | |
8a5b33f5 | 781 | netif_tx_start_all_queues(sdata->dev); |
9ac19a90 | 782 | netif_carrier_on(sdata->dev); |
f0706e82 JB |
783 | } |
784 | ||
63f170e0 | 785 | static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata) |
aa458d17 | 786 | { |
46900298 | 787 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
aa458d17 TW |
788 | struct ieee80211_local *local = sdata->local; |
789 | struct sta_info *sta; | |
e0cb686f | 790 | u32 changed = 0, config_changed = 0; |
b291ba11 | 791 | u8 bssid[ETH_ALEN]; |
aa458d17 | 792 | |
77fdaa12 JB |
793 | ASSERT_MGD_MTX(ifmgd); |
794 | ||
b291ba11 JB |
795 | if (WARN_ON(!ifmgd->associated)) |
796 | return; | |
797 | ||
0c1ad2ca | 798 | memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); |
b291ba11 | 799 | |
77fdaa12 JB |
800 | ifmgd->associated = NULL; |
801 | memset(ifmgd->bssid, 0, ETH_ALEN); | |
802 | ||
803 | /* | |
804 | * we need to commit the associated = NULL change because the | |
805 | * scan code uses that to determine whether this iface should | |
806 | * go to/wake up from powersave or not -- and could otherwise | |
807 | * wake the queues erroneously. | |
808 | */ | |
809 | smp_mb(); | |
810 | ||
811 | /* | |
812 | * Thus, we can only afterwards stop the queues -- to account | |
813 | * for the case where another CPU is finishing a scan at this | |
814 | * time -- we don't want the scan code to enable queues. | |
815 | */ | |
aa458d17 | 816 | |
8a5b33f5 | 817 | netif_tx_stop_all_queues(sdata->dev); |
aa458d17 TW |
818 | netif_carrier_off(sdata->dev); |
819 | ||
1fa6f4af | 820 | rcu_read_lock(); |
abe60632 | 821 | sta = sta_info_get(sdata, bssid); |
4cad6c7c S |
822 | if (sta) { |
823 | set_sta_flags(sta, WLAN_STA_DISASSOC); | |
1fa6f4af | 824 | ieee80211_sta_tear_down_BA_sessions(sta); |
4cad6c7c | 825 | } |
1fa6f4af | 826 | rcu_read_unlock(); |
aa458d17 | 827 | |
f5e5bf25 TW |
828 | changed |= ieee80211_reset_erp_info(sdata); |
829 | ||
f5e5bf25 | 830 | ieee80211_led_assoc(local, 0); |
ae5eb026 JB |
831 | changed |= BSS_CHANGED_ASSOC; |
832 | sdata->vif.bss_conf.assoc = false; | |
f5e5bf25 | 833 | |
aa837e1d JB |
834 | ieee80211_set_wmm_default(sdata); |
835 | ||
4797938c | 836 | /* channel(_type) changes are handled by ieee80211_hw_config */ |
094d05dc | 837 | local->oper_channel_type = NL80211_CHAN_NO_HT; |
e0cb686f | 838 | |
413ad50a JB |
839 | /* on the next assoc, re-program HT parameters */ |
840 | sdata->ht_opmode_valid = false; | |
841 | ||
a8302de9 VT |
842 | local->power_constr_level = 0; |
843 | ||
520eb820 KV |
844 | del_timer_sync(&local->dynamic_ps_timer); |
845 | cancel_work_sync(&local->dynamic_ps_enable_work); | |
846 | ||
e0cb686f KV |
847 | if (local->hw.conf.flags & IEEE80211_CONF_PS) { |
848 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; | |
849 | config_changed |= IEEE80211_CONF_CHANGE_PS; | |
850 | } | |
ae5eb026 | 851 | |
e0cb686f | 852 | ieee80211_hw_config(local, config_changed); |
9cef8737 JB |
853 | |
854 | /* And the BSSID changed -- not very interesting here */ | |
855 | changed |= BSS_CHANGED_BSSID; | |
ae5eb026 | 856 | ieee80211_bss_info_change_notify(sdata, changed); |
8e268e47 | 857 | |
34e89507 | 858 | sta_info_destroy_addr(sdata, bssid); |
aa458d17 | 859 | } |
f0706e82 | 860 | |
3cf335d5 KV |
861 | void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata, |
862 | struct ieee80211_hdr *hdr) | |
863 | { | |
864 | /* | |
865 | * We can postpone the mgd.timer whenever receiving unicast frames | |
866 | * from AP because we know that the connection is working both ways | |
867 | * at that time. But multicast frames (and hence also beacons) must | |
868 | * be ignored here, because we need to trigger the timer during | |
b291ba11 JB |
869 | * data idle periods for sending the periodic probe request to the |
870 | * AP we're connected to. | |
3cf335d5 | 871 | */ |
b291ba11 JB |
872 | if (is_multicast_ether_addr(hdr->addr1)) |
873 | return; | |
874 | ||
1e4dcd01 JO |
875 | if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR) |
876 | return; | |
877 | ||
b291ba11 JB |
878 | mod_timer(&sdata->u.mgd.conn_mon_timer, |
879 | round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME)); | |
3cf335d5 | 880 | } |
f0706e82 | 881 | |
a43abf29 ML |
882 | static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) |
883 | { | |
884 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
885 | const u8 *ssid; | |
886 | ||
0c1ad2ca JB |
887 | ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID); |
888 | ieee80211_send_probe_req(sdata, ifmgd->associated->bssid, | |
a43abf29 ML |
889 | ssid + 2, ssid[1], NULL, 0); |
890 | ||
891 | ifmgd->probe_send_count++; | |
892 | ifmgd->probe_timeout = jiffies + IEEE80211_PROBE_WAIT; | |
893 | run_again(ifmgd, ifmgd->probe_timeout); | |
894 | } | |
895 | ||
b291ba11 JB |
896 | static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, |
897 | bool beacon) | |
04de8381 | 898 | { |
04de8381 | 899 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
b291ba11 | 900 | bool already = false; |
34bfc411 | 901 | |
9607e6b6 | 902 | if (!ieee80211_sdata_running(sdata)) |
0e2b6286 JB |
903 | return; |
904 | ||
91a3bd76 LR |
905 | if (sdata->local->scanning) |
906 | return; | |
907 | ||
b8bc4b0a JB |
908 | if (sdata->local->tmp_channel) |
909 | return; | |
910 | ||
77fdaa12 JB |
911 | mutex_lock(&ifmgd->mtx); |
912 | ||
913 | if (!ifmgd->associated) | |
914 | goto out; | |
915 | ||
a860402d | 916 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
b291ba11 JB |
917 | if (beacon && net_ratelimit()) |
918 | printk(KERN_DEBUG "%s: detected beacon loss from AP " | |
47846c9b | 919 | "- sending probe request\n", sdata->name); |
a860402d | 920 | #endif |
04de8381 | 921 | |
b291ba11 JB |
922 | /* |
923 | * The driver/our work has already reported this event or the | |
924 | * connection monitoring has kicked in and we have already sent | |
925 | * a probe request. Or maybe the AP died and the driver keeps | |
926 | * reporting until we disassociate... | |
927 | * | |
928 | * In either case we have to ignore the current call to this | |
929 | * function (except for setting the correct probe reason bit) | |
930 | * because otherwise we would reset the timer every time and | |
931 | * never check whether we received a probe response! | |
932 | */ | |
933 | if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL | | |
934 | IEEE80211_STA_CONNECTION_POLL)) | |
935 | already = true; | |
936 | ||
937 | if (beacon) | |
938 | ifmgd->flags |= IEEE80211_STA_BEACON_POLL; | |
939 | else | |
940 | ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; | |
941 | ||
942 | if (already) | |
943 | goto out; | |
944 | ||
4e751843 JB |
945 | mutex_lock(&sdata->local->iflist_mtx); |
946 | ieee80211_recalc_ps(sdata->local, -1); | |
947 | mutex_unlock(&sdata->local->iflist_mtx); | |
948 | ||
a43abf29 ML |
949 | ifmgd->probe_send_count = 0; |
950 | ieee80211_mgd_probe_ap_send(sdata); | |
77fdaa12 JB |
951 | out: |
952 | mutex_unlock(&ifmgd->mtx); | |
04de8381 KV |
953 | } |
954 | ||
1e4dcd01 JO |
955 | static void __ieee80211_connection_loss(struct ieee80211_sub_if_data *sdata) |
956 | { | |
957 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
958 | struct ieee80211_local *local = sdata->local; | |
959 | u8 bssid[ETH_ALEN]; | |
960 | ||
961 | mutex_lock(&ifmgd->mtx); | |
962 | if (!ifmgd->associated) { | |
963 | mutex_unlock(&ifmgd->mtx); | |
964 | return; | |
965 | } | |
966 | ||
967 | memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); | |
968 | ||
969 | printk(KERN_DEBUG "Connection to AP %pM lost.\n", bssid); | |
970 | ||
971 | ieee80211_set_disassoc(sdata); | |
972 | ieee80211_recalc_idle(local); | |
973 | mutex_unlock(&ifmgd->mtx); | |
974 | /* | |
975 | * must be outside lock due to cfg80211, | |
976 | * but that's not a problem. | |
977 | */ | |
978 | ieee80211_send_deauth_disassoc(sdata, bssid, | |
979 | IEEE80211_STYPE_DEAUTH, | |
980 | WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, | |
981 | NULL); | |
982 | } | |
983 | ||
984 | void ieee80211_beacon_connection_loss_work(struct work_struct *work) | |
b291ba11 JB |
985 | { |
986 | struct ieee80211_sub_if_data *sdata = | |
987 | container_of(work, struct ieee80211_sub_if_data, | |
1e4dcd01 | 988 | u.mgd.beacon_connection_loss_work); |
b291ba11 | 989 | |
1e4dcd01 JO |
990 | if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR) |
991 | __ieee80211_connection_loss(sdata); | |
992 | else | |
993 | ieee80211_mgd_probe_ap(sdata, true); | |
b291ba11 JB |
994 | } |
995 | ||
04de8381 KV |
996 | void ieee80211_beacon_loss(struct ieee80211_vif *vif) |
997 | { | |
998 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
1e4dcd01 | 999 | struct ieee80211_hw *hw = &sdata->local->hw; |
04de8381 | 1000 | |
1e4dcd01 JO |
1001 | WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR); |
1002 | ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); | |
04de8381 KV |
1003 | } |
1004 | EXPORT_SYMBOL(ieee80211_beacon_loss); | |
1005 | ||
1e4dcd01 JO |
1006 | void ieee80211_connection_loss(struct ieee80211_vif *vif) |
1007 | { | |
1008 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
1009 | struct ieee80211_hw *hw = &sdata->local->hw; | |
1010 | ||
1011 | WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR)); | |
1012 | ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); | |
1013 | } | |
1014 | EXPORT_SYMBOL(ieee80211_connection_loss); | |
1015 | ||
1016 | ||
77fdaa12 JB |
1017 | static enum rx_mgmt_action __must_check |
1018 | ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, | |
77fdaa12 | 1019 | struct ieee80211_mgmt *mgmt, size_t len) |
f0706e82 | 1020 | { |
46900298 | 1021 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
77fdaa12 | 1022 | const u8 *bssid = NULL; |
f0706e82 JB |
1023 | u16 reason_code; |
1024 | ||
f4ea83dd | 1025 | if (len < 24 + 2) |
77fdaa12 | 1026 | return RX_MGMT_NONE; |
f0706e82 | 1027 | |
77fdaa12 JB |
1028 | ASSERT_MGD_MTX(ifmgd); |
1029 | ||
0c1ad2ca | 1030 | bssid = ifmgd->associated->bssid; |
f0706e82 JB |
1031 | |
1032 | reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); | |
1033 | ||
77fdaa12 | 1034 | printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n", |
47846c9b | 1035 | sdata->name, bssid, reason_code); |
77fdaa12 | 1036 | |
63f170e0 JB |
1037 | ieee80211_set_disassoc(sdata); |
1038 | ieee80211_recalc_idle(sdata->local); | |
f0706e82 | 1039 | |
77fdaa12 | 1040 | return RX_MGMT_CFG80211_DEAUTH; |
f0706e82 JB |
1041 | } |
1042 | ||
1043 | ||
77fdaa12 JB |
1044 | static enum rx_mgmt_action __must_check |
1045 | ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, | |
1046 | struct ieee80211_mgmt *mgmt, size_t len) | |
f0706e82 | 1047 | { |
46900298 | 1048 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f0706e82 JB |
1049 | u16 reason_code; |
1050 | ||
f4ea83dd | 1051 | if (len < 24 + 2) |
77fdaa12 | 1052 | return RX_MGMT_NONE; |
f0706e82 | 1053 | |
77fdaa12 JB |
1054 | ASSERT_MGD_MTX(ifmgd); |
1055 | ||
1056 | if (WARN_ON(!ifmgd->associated)) | |
1057 | return RX_MGMT_NONE; | |
1058 | ||
0c1ad2ca | 1059 | if (WARN_ON(memcmp(ifmgd->associated->bssid, mgmt->sa, ETH_ALEN))) |
77fdaa12 | 1060 | return RX_MGMT_NONE; |
f0706e82 JB |
1061 | |
1062 | reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); | |
1063 | ||
0ff71613 | 1064 | printk(KERN_DEBUG "%s: disassociated from %pM (Reason: %u)\n", |
47846c9b | 1065 | sdata->name, mgmt->sa, reason_code); |
f0706e82 | 1066 | |
63f170e0 | 1067 | ieee80211_set_disassoc(sdata); |
bc83b681 | 1068 | ieee80211_recalc_idle(sdata->local); |
77fdaa12 | 1069 | return RX_MGMT_CFG80211_DISASSOC; |
f0706e82 JB |
1070 | } |
1071 | ||
1072 | ||
af6b6374 JB |
1073 | static bool ieee80211_assoc_success(struct ieee80211_work *wk, |
1074 | struct ieee80211_mgmt *mgmt, size_t len) | |
f0706e82 | 1075 | { |
af6b6374 | 1076 | struct ieee80211_sub_if_data *sdata = wk->sdata; |
46900298 | 1077 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
471b3efd | 1078 | struct ieee80211_local *local = sdata->local; |
8318d78a | 1079 | struct ieee80211_supported_band *sband; |
f0706e82 | 1080 | struct sta_info *sta; |
0c1ad2ca | 1081 | struct cfg80211_bss *cbss = wk->assoc.bss; |
af6b6374 | 1082 | u8 *pos; |
881d948c | 1083 | u32 rates, basic_rates; |
af6b6374 | 1084 | u16 capab_info, aid; |
f0706e82 | 1085 | struct ieee802_11_elems elems; |
bda3933a | 1086 | struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; |
ae5eb026 | 1087 | u32 changed = 0; |
5d1ec85f JB |
1088 | int i, j, err; |
1089 | bool have_higher_than_11mbit = false; | |
ae5eb026 | 1090 | u16 ap_ht_cap_flags; |
f0706e82 | 1091 | |
af6b6374 | 1092 | /* AssocResp and ReassocResp have identical structure */ |
f0706e82 | 1093 | |
f0706e82 | 1094 | aid = le16_to_cpu(mgmt->u.assoc_resp.aid); |
af6b6374 | 1095 | capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); |
f0706e82 | 1096 | |
1dd84aa2 JB |
1097 | if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14))) |
1098 | printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not " | |
47846c9b | 1099 | "set\n", sdata->name, aid); |
1dd84aa2 JB |
1100 | aid &= ~(BIT(15) | BIT(14)); |
1101 | ||
af6b6374 JB |
1102 | pos = mgmt->u.assoc_resp.variable; |
1103 | ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems); | |
1104 | ||
f0706e82 JB |
1105 | if (!elems.supp_rates) { |
1106 | printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n", | |
47846c9b | 1107 | sdata->name); |
af6b6374 | 1108 | return false; |
f0706e82 JB |
1109 | } |
1110 | ||
46900298 | 1111 | ifmgd->aid = aid; |
f0706e82 | 1112 | |
0c1ad2ca | 1113 | sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL); |
f0706e82 | 1114 | if (!sta) { |
5d1ec85f JB |
1115 | printk(KERN_DEBUG "%s: failed to alloc STA entry for" |
1116 | " the AP\n", sdata->name); | |
af6b6374 | 1117 | return false; |
77fdaa12 | 1118 | } |
05e5e883 | 1119 | |
5d1ec85f JB |
1120 | set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | |
1121 | WLAN_STA_ASSOC_AP); | |
1122 | if (!(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) | |
1123 | set_sta_flags(sta, WLAN_STA_AUTHORIZED); | |
1124 | ||
60f8b39c JB |
1125 | rates = 0; |
1126 | basic_rates = 0; | |
1127 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
f709fc69 | 1128 | |
60f8b39c JB |
1129 | for (i = 0; i < elems.supp_rates_len; i++) { |
1130 | int rate = (elems.supp_rates[i] & 0x7f) * 5; | |
d61272cb | 1131 | bool is_basic = !!(elems.supp_rates[i] & 0x80); |
f709fc69 | 1132 | |
60f8b39c JB |
1133 | if (rate > 110) |
1134 | have_higher_than_11mbit = true; | |
1135 | ||
1136 | for (j = 0; j < sband->n_bitrates; j++) { | |
d61272cb | 1137 | if (sband->bitrates[j].bitrate == rate) { |
60f8b39c | 1138 | rates |= BIT(j); |
d61272cb TW |
1139 | if (is_basic) |
1140 | basic_rates |= BIT(j); | |
1141 | break; | |
1142 | } | |
f709fc69 | 1143 | } |
f709fc69 LCC |
1144 | } |
1145 | ||
60f8b39c JB |
1146 | for (i = 0; i < elems.ext_supp_rates_len; i++) { |
1147 | int rate = (elems.ext_supp_rates[i] & 0x7f) * 5; | |
7e0986c1 | 1148 | bool is_basic = !!(elems.ext_supp_rates[i] & 0x80); |
f0706e82 | 1149 | |
60f8b39c JB |
1150 | if (rate > 110) |
1151 | have_higher_than_11mbit = true; | |
f0706e82 | 1152 | |
60f8b39c | 1153 | for (j = 0; j < sband->n_bitrates; j++) { |
d61272cb | 1154 | if (sband->bitrates[j].bitrate == rate) { |
60f8b39c | 1155 | rates |= BIT(j); |
d61272cb TW |
1156 | if (is_basic) |
1157 | basic_rates |= BIT(j); | |
1158 | break; | |
1159 | } | |
60f8b39c | 1160 | } |
1ebebea8 | 1161 | } |
f0706e82 | 1162 | |
323ce79a | 1163 | sta->sta.supp_rates[local->hw.conf.channel->band] = rates; |
bda3933a | 1164 | sdata->vif.bss_conf.basic_rates = basic_rates; |
60f8b39c JB |
1165 | |
1166 | /* cf. IEEE 802.11 9.2.12 */ | |
1167 | if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ && | |
1168 | have_higher_than_11mbit) | |
1169 | sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; | |
1170 | else | |
1171 | sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; | |
f0706e82 | 1172 | |
ab1faead | 1173 | if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) |
ae5eb026 | 1174 | ieee80211_ht_cap_ie_to_sta_ht_cap(sband, |
d9fe60de | 1175 | elems.ht_cap_elem, &sta->sta.ht_cap); |
ae5eb026 JB |
1176 | |
1177 | ap_ht_cap_flags = sta->sta.ht_cap.cap; | |
f0706e82 | 1178 | |
4b7679a5 | 1179 | rate_control_rate_init(sta); |
f0706e82 | 1180 | |
46900298 | 1181 | if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) |
5394af4d JM |
1182 | set_sta_flags(sta, WLAN_STA_MFP); |
1183 | ||
ddf4ac53 | 1184 | if (elems.wmm_param) |
60f8b39c | 1185 | set_sta_flags(sta, WLAN_STA_WME); |
ddf4ac53 | 1186 | |
5d1ec85f JB |
1187 | err = sta_info_insert(sta); |
1188 | sta = NULL; | |
1189 | if (err) { | |
1190 | printk(KERN_DEBUG "%s: failed to insert STA entry for" | |
1191 | " the AP (error %d)\n", sdata->name, err); | |
90be561b | 1192 | return false; |
ddf4ac53 JB |
1193 | } |
1194 | ||
ddf4ac53 | 1195 | if (elems.wmm_param) |
46900298 | 1196 | ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param, |
60f8b39c | 1197 | elems.wmm_param_len); |
aa837e1d JB |
1198 | else |
1199 | ieee80211_set_wmm_default(sdata); | |
f0706e82 | 1200 | |
e4da8c37 JB |
1201 | local->oper_channel = wk->chan; |
1202 | ||
ae5eb026 | 1203 | if (elems.ht_info_elem && elems.wmm_param && |
af6b6374 | 1204 | (sdata->local->hw.queues >= 4) && |
ab1faead | 1205 | !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) |
ae5eb026 | 1206 | changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem, |
0c1ad2ca | 1207 | cbss->bssid, ap_ht_cap_flags); |
ae5eb026 | 1208 | |
60f8b39c JB |
1209 | /* set AID and assoc capability, |
1210 | * ieee80211_set_associated() will tell the driver */ | |
1211 | bss_conf->aid = aid; | |
1212 | bss_conf->assoc_capability = capab_info; | |
0c1ad2ca | 1213 | ieee80211_set_associated(sdata, cbss, changed); |
f0706e82 | 1214 | |
d524215f FF |
1215 | /* |
1216 | * If we're using 4-addr mode, let the AP know that we're | |
1217 | * doing so, so that it can create the STA VLAN on its side | |
1218 | */ | |
1219 | if (ifmgd->use_4addr) | |
1220 | ieee80211_send_4addr_nullfunc(local, sdata); | |
1221 | ||
15b7b062 | 1222 | /* |
b291ba11 JB |
1223 | * Start timer to probe the connection to the AP now. |
1224 | * Also start the timer that will detect beacon loss. | |
15b7b062 | 1225 | */ |
b291ba11 JB |
1226 | ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt); |
1227 | mod_beacon_timer(sdata); | |
15b7b062 | 1228 | |
af6b6374 | 1229 | return true; |
f0706e82 JB |
1230 | } |
1231 | ||
1232 | ||
98c8fccf JB |
1233 | static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, |
1234 | struct ieee80211_mgmt *mgmt, | |
1235 | size_t len, | |
1236 | struct ieee80211_rx_status *rx_status, | |
1237 | struct ieee802_11_elems *elems, | |
1238 | bool beacon) | |
1239 | { | |
1240 | struct ieee80211_local *local = sdata->local; | |
1241 | int freq; | |
c2b13452 | 1242 | struct ieee80211_bss *bss; |
98c8fccf | 1243 | struct ieee80211_channel *channel; |
56007a02 JB |
1244 | bool need_ps = false; |
1245 | ||
1246 | if (sdata->u.mgd.associated) { | |
1247 | bss = (void *)sdata->u.mgd.associated->priv; | |
1248 | /* not previously set so we may need to recalc */ | |
1249 | need_ps = !bss->dtim_period; | |
1250 | } | |
98c8fccf JB |
1251 | |
1252 | if (elems->ds_params && elems->ds_params_len == 1) | |
1253 | freq = ieee80211_channel_to_frequency(elems->ds_params[0]); | |
1254 | else | |
1255 | freq = rx_status->freq; | |
1256 | ||
1257 | channel = ieee80211_get_channel(local->hw.wiphy, freq); | |
1258 | ||
1259 | if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) | |
1260 | return; | |
1261 | ||
98c8fccf | 1262 | bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems, |
2a519311 | 1263 | channel, beacon); |
77fdaa12 JB |
1264 | if (bss) |
1265 | ieee80211_rx_bss_put(local, bss); | |
1266 | ||
1267 | if (!sdata->u.mgd.associated) | |
98c8fccf JB |
1268 | return; |
1269 | ||
56007a02 JB |
1270 | if (need_ps) { |
1271 | mutex_lock(&local->iflist_mtx); | |
1272 | ieee80211_recalc_ps(local, -1); | |
1273 | mutex_unlock(&local->iflist_mtx); | |
1274 | } | |
1275 | ||
c481ec97 | 1276 | if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) && |
0c1ad2ca | 1277 | (memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid, |
77fdaa12 | 1278 | ETH_ALEN) == 0)) { |
c481ec97 S |
1279 | struct ieee80211_channel_sw_ie *sw_elem = |
1280 | (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem; | |
cc32abd4 | 1281 | ieee80211_sta_process_chanswitch(sdata, sw_elem, bss); |
c481ec97 | 1282 | } |
f0706e82 JB |
1283 | } |
1284 | ||
1285 | ||
f698d856 | 1286 | static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata, |
af6b6374 | 1287 | struct sk_buff *skb) |
f0706e82 | 1288 | { |
af6b6374 | 1289 | struct ieee80211_mgmt *mgmt = (void *)skb->data; |
15b7b062 | 1290 | struct ieee80211_if_managed *ifmgd; |
af6b6374 JB |
1291 | struct ieee80211_rx_status *rx_status = (void *) skb->cb; |
1292 | size_t baselen, len = skb->len; | |
ae6a44e3 EK |
1293 | struct ieee802_11_elems elems; |
1294 | ||
15b7b062 KV |
1295 | ifmgd = &sdata->u.mgd; |
1296 | ||
77fdaa12 JB |
1297 | ASSERT_MGD_MTX(ifmgd); |
1298 | ||
47846c9b | 1299 | if (memcmp(mgmt->da, sdata->vif.addr, ETH_ALEN)) |
8e7cdbb6 TW |
1300 | return; /* ignore ProbeResp to foreign address */ |
1301 | ||
ae6a44e3 EK |
1302 | baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; |
1303 | if (baselen > len) | |
1304 | return; | |
1305 | ||
1306 | ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, | |
1307 | &elems); | |
1308 | ||
98c8fccf | 1309 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false); |
9859b81e | 1310 | |
77fdaa12 | 1311 | if (ifmgd->associated && |
0c1ad2ca | 1312 | memcmp(mgmt->bssid, ifmgd->associated->bssid, ETH_ALEN) == 0 && |
b291ba11 JB |
1313 | ifmgd->flags & (IEEE80211_STA_BEACON_POLL | |
1314 | IEEE80211_STA_CONNECTION_POLL)) { | |
1315 | ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL | | |
1316 | IEEE80211_STA_BEACON_POLL); | |
4e751843 JB |
1317 | mutex_lock(&sdata->local->iflist_mtx); |
1318 | ieee80211_recalc_ps(sdata->local, -1); | |
1319 | mutex_unlock(&sdata->local->iflist_mtx); | |
b291ba11 JB |
1320 | /* |
1321 | * We've received a probe response, but are not sure whether | |
1322 | * we have or will be receiving any beacons or data, so let's | |
1323 | * schedule the timers again, just in case. | |
1324 | */ | |
1325 | mod_beacon_timer(sdata); | |
1326 | mod_timer(&ifmgd->conn_mon_timer, | |
1327 | round_jiffies_up(jiffies + | |
1328 | IEEE80211_CONNECTION_IDLE_TIME)); | |
4e751843 | 1329 | } |
f0706e82 JB |
1330 | } |
1331 | ||
d91f36db JB |
1332 | /* |
1333 | * This is the canonical list of information elements we care about, | |
1334 | * the filter code also gives us all changes to the Microsoft OUI | |
1335 | * (00:50:F2) vendor IE which is used for WMM which we need to track. | |
1336 | * | |
1337 | * We implement beacon filtering in software since that means we can | |
1338 | * avoid processing the frame here and in cfg80211, and userspace | |
1339 | * will not be able to tell whether the hardware supports it or not. | |
1340 | * | |
1341 | * XXX: This list needs to be dynamic -- userspace needs to be able to | |
1342 | * add items it requires. It also needs to be able to tell us to | |
1343 | * look out for other vendor IEs. | |
1344 | */ | |
1345 | static const u64 care_about_ies = | |
1d4df3a5 JB |
1346 | (1ULL << WLAN_EID_COUNTRY) | |
1347 | (1ULL << WLAN_EID_ERP_INFO) | | |
1348 | (1ULL << WLAN_EID_CHANNEL_SWITCH) | | |
1349 | (1ULL << WLAN_EID_PWR_CONSTRAINT) | | |
1350 | (1ULL << WLAN_EID_HT_CAPABILITY) | | |
1351 | (1ULL << WLAN_EID_HT_INFORMATION); | |
d91f36db | 1352 | |
f698d856 | 1353 | static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1354 | struct ieee80211_mgmt *mgmt, |
1355 | size_t len, | |
1356 | struct ieee80211_rx_status *rx_status) | |
1357 | { | |
d91f36db | 1358 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
17e4ec14 | 1359 | struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; |
f0706e82 JB |
1360 | size_t baselen; |
1361 | struct ieee802_11_elems elems; | |
f698d856 | 1362 | struct ieee80211_local *local = sdata->local; |
471b3efd | 1363 | u32 changed = 0; |
d91f36db | 1364 | bool erp_valid, directed_tim = false; |
7a5158ef | 1365 | u8 erp_value = 0; |
d91f36db | 1366 | u32 ncrc; |
77fdaa12 JB |
1367 | u8 *bssid; |
1368 | ||
1369 | ASSERT_MGD_MTX(ifmgd); | |
f0706e82 | 1370 | |
ae6a44e3 EK |
1371 | /* Process beacon from the current BSS */ |
1372 | baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt; | |
1373 | if (baselen > len) | |
1374 | return; | |
1375 | ||
d91f36db | 1376 | if (rx_status->freq != local->hw.conf.channel->center_freq) |
f0706e82 | 1377 | return; |
f0706e82 | 1378 | |
b291ba11 JB |
1379 | /* |
1380 | * We might have received a number of frames, among them a | |
1381 | * disassoc frame and a beacon... | |
1382 | */ | |
1383 | if (!ifmgd->associated) | |
77fdaa12 JB |
1384 | return; |
1385 | ||
0c1ad2ca | 1386 | bssid = ifmgd->associated->bssid; |
77fdaa12 | 1387 | |
b291ba11 JB |
1388 | /* |
1389 | * And in theory even frames from a different AP we were just | |
1390 | * associated to a split-second ago! | |
1391 | */ | |
1392 | if (memcmp(bssid, mgmt->bssid, ETH_ALEN) != 0) | |
f0706e82 JB |
1393 | return; |
1394 | ||
17e4ec14 JM |
1395 | /* Track average RSSI from the Beacon frames of the current AP */ |
1396 | ifmgd->last_beacon_signal = rx_status->signal; | |
1397 | if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) { | |
1398 | ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE; | |
1399 | ifmgd->ave_beacon_signal = rx_status->signal; | |
1400 | ifmgd->last_cqm_event_signal = 0; | |
1401 | } else { | |
1402 | ifmgd->ave_beacon_signal = | |
1403 | (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 + | |
1404 | (16 - IEEE80211_SIGNAL_AVE_WEIGHT) * | |
1405 | ifmgd->ave_beacon_signal) / 16; | |
1406 | } | |
1407 | if (bss_conf->cqm_rssi_thold && | |
1408 | !(local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI)) { | |
1409 | int sig = ifmgd->ave_beacon_signal / 16; | |
1410 | int last_event = ifmgd->last_cqm_event_signal; | |
1411 | int thold = bss_conf->cqm_rssi_thold; | |
1412 | int hyst = bss_conf->cqm_rssi_hyst; | |
1413 | if (sig < thold && | |
1414 | (last_event == 0 || sig < last_event - hyst)) { | |
1415 | ifmgd->last_cqm_event_signal = sig; | |
1416 | ieee80211_cqm_rssi_notify( | |
1417 | &sdata->vif, | |
1418 | NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, | |
1419 | GFP_KERNEL); | |
1420 | } else if (sig > thold && | |
1421 | (last_event == 0 || sig > last_event + hyst)) { | |
1422 | ifmgd->last_cqm_event_signal = sig; | |
1423 | ieee80211_cqm_rssi_notify( | |
1424 | &sdata->vif, | |
1425 | NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, | |
1426 | GFP_KERNEL); | |
1427 | } | |
1428 | } | |
1429 | ||
b291ba11 | 1430 | if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) { |
92778180 JM |
1431 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
1432 | if (net_ratelimit()) { | |
1433 | printk(KERN_DEBUG "%s: cancelling probereq poll due " | |
47846c9b | 1434 | "to a received beacon\n", sdata->name); |
92778180 JM |
1435 | } |
1436 | #endif | |
b291ba11 | 1437 | ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL; |
4e751843 JB |
1438 | mutex_lock(&local->iflist_mtx); |
1439 | ieee80211_recalc_ps(local, -1); | |
1440 | mutex_unlock(&local->iflist_mtx); | |
92778180 JM |
1441 | } |
1442 | ||
b291ba11 JB |
1443 | /* |
1444 | * Push the beacon loss detection into the future since | |
1445 | * we are processing a beacon from the AP just now. | |
1446 | */ | |
1447 | mod_beacon_timer(sdata); | |
1448 | ||
d91f36db JB |
1449 | ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); |
1450 | ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable, | |
1451 | len - baselen, &elems, | |
1452 | care_about_ies, ncrc); | |
1453 | ||
1454 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) | |
e7ec86f5 JB |
1455 | directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len, |
1456 | ifmgd->aid); | |
d91f36db | 1457 | |
30196673 JM |
1458 | if (ncrc != ifmgd->beacon_crc) { |
1459 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, | |
1460 | true); | |
d91f36db | 1461 | |
30196673 JM |
1462 | ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param, |
1463 | elems.wmm_param_len); | |
1464 | } | |
fe3fa827 | 1465 | |
25c9c875 | 1466 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) { |
1fb3606b | 1467 | if (directed_tim) { |
572e0012 KV |
1468 | if (local->hw.conf.dynamic_ps_timeout > 0) { |
1469 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; | |
1470 | ieee80211_hw_config(local, | |
1471 | IEEE80211_CONF_CHANGE_PS); | |
1472 | ieee80211_send_nullfunc(local, sdata, 0); | |
1473 | } else { | |
1474 | local->pspolling = true; | |
1475 | ||
1476 | /* | |
1477 | * Here is assumed that the driver will be | |
1478 | * able to send ps-poll frame and receive a | |
1479 | * response even though power save mode is | |
1480 | * enabled, but some drivers might require | |
1481 | * to disable power save here. This needs | |
1482 | * to be investigated. | |
1483 | */ | |
1484 | ieee80211_send_pspoll(local, sdata); | |
1485 | } | |
a97b77b9 VN |
1486 | } |
1487 | } | |
7a5158ef | 1488 | |
30196673 JM |
1489 | if (ncrc == ifmgd->beacon_crc) |
1490 | return; | |
1491 | ifmgd->beacon_crc = ncrc; | |
1492 | ||
7a5158ef JB |
1493 | if (elems.erp_info && elems.erp_info_len >= 1) { |
1494 | erp_valid = true; | |
1495 | erp_value = elems.erp_info[0]; | |
1496 | } else { | |
1497 | erp_valid = false; | |
50c4afb9 | 1498 | } |
7a5158ef JB |
1499 | changed |= ieee80211_handle_bss_capability(sdata, |
1500 | le16_to_cpu(mgmt->u.beacon.capab_info), | |
1501 | erp_valid, erp_value); | |
f0706e82 | 1502 | |
d3c990fb | 1503 | |
53d6f81c | 1504 | if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param && |
ab1faead | 1505 | !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) { |
ae5eb026 JB |
1506 | struct sta_info *sta; |
1507 | struct ieee80211_supported_band *sband; | |
1508 | u16 ap_ht_cap_flags; | |
1509 | ||
1510 | rcu_read_lock(); | |
1511 | ||
abe60632 | 1512 | sta = sta_info_get(sdata, bssid); |
77fdaa12 | 1513 | if (WARN_ON(!sta)) { |
ae5eb026 JB |
1514 | rcu_read_unlock(); |
1515 | return; | |
1516 | } | |
1517 | ||
1518 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
1519 | ||
1520 | ieee80211_ht_cap_ie_to_sta_ht_cap(sband, | |
1521 | elems.ht_cap_elem, &sta->sta.ht_cap); | |
1522 | ||
1523 | ap_ht_cap_flags = sta->sta.ht_cap.cap; | |
1524 | ||
1525 | rcu_read_unlock(); | |
1526 | ||
1527 | changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem, | |
77fdaa12 | 1528 | bssid, ap_ht_cap_flags); |
d3c990fb RR |
1529 | } |
1530 | ||
8b19e6ca | 1531 | /* Note: country IE parsing is done for us by cfg80211 */ |
3f2355cb | 1532 | if (elems.country_elem) { |
a8302de9 VT |
1533 | /* TODO: IBSS also needs this */ |
1534 | if (elems.pwr_constr_elem) | |
1535 | ieee80211_handle_pwr_constr(sdata, | |
1536 | le16_to_cpu(mgmt->u.probe_resp.capab_info), | |
1537 | elems.pwr_constr_elem, | |
1538 | elems.pwr_constr_elem_len); | |
3f2355cb LR |
1539 | } |
1540 | ||
471b3efd | 1541 | ieee80211_bss_info_change_notify(sdata, changed); |
f0706e82 JB |
1542 | } |
1543 | ||
46900298 | 1544 | ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, |
f1d58c25 | 1545 | struct sk_buff *skb) |
f0706e82 | 1546 | { |
f698d856 | 1547 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
1548 | struct ieee80211_mgmt *mgmt; |
1549 | u16 fc; | |
1550 | ||
1551 | if (skb->len < 24) | |
46900298 | 1552 | return RX_DROP_MONITOR; |
f0706e82 JB |
1553 | |
1554 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
1555 | fc = le16_to_cpu(mgmt->frame_control); | |
1556 | ||
1557 | switch (fc & IEEE80211_FCTL_STYPE) { | |
f0706e82 JB |
1558 | case IEEE80211_STYPE_PROBE_RESP: |
1559 | case IEEE80211_STYPE_BEACON: | |
f0706e82 JB |
1560 | case IEEE80211_STYPE_DEAUTH: |
1561 | case IEEE80211_STYPE_DISASSOC: | |
77fdaa12 | 1562 | case IEEE80211_STYPE_ACTION: |
46900298 | 1563 | skb_queue_tail(&sdata->u.mgd.skb_queue, skb); |
42935eca | 1564 | ieee80211_queue_work(&local->hw, &sdata->u.mgd.work); |
46900298 | 1565 | return RX_QUEUED; |
f0706e82 JB |
1566 | } |
1567 | ||
46900298 | 1568 | return RX_DROP_MONITOR; |
f0706e82 JB |
1569 | } |
1570 | ||
f698d856 | 1571 | static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1572 | struct sk_buff *skb) |
1573 | { | |
77fdaa12 | 1574 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f0706e82 | 1575 | struct ieee80211_rx_status *rx_status; |
f0706e82 | 1576 | struct ieee80211_mgmt *mgmt; |
77fdaa12 | 1577 | enum rx_mgmt_action rma = RX_MGMT_NONE; |
f0706e82 JB |
1578 | u16 fc; |
1579 | ||
f0706e82 JB |
1580 | rx_status = (struct ieee80211_rx_status *) skb->cb; |
1581 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
1582 | fc = le16_to_cpu(mgmt->frame_control); | |
1583 | ||
77fdaa12 JB |
1584 | mutex_lock(&ifmgd->mtx); |
1585 | ||
1586 | if (ifmgd->associated && | |
0c1ad2ca | 1587 | memcmp(ifmgd->associated->bssid, mgmt->bssid, ETH_ALEN) == 0) { |
77fdaa12 JB |
1588 | switch (fc & IEEE80211_FCTL_STYPE) { |
1589 | case IEEE80211_STYPE_BEACON: | |
1590 | ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, | |
1591 | rx_status); | |
1592 | break; | |
1593 | case IEEE80211_STYPE_PROBE_RESP: | |
af6b6374 | 1594 | ieee80211_rx_mgmt_probe_resp(sdata, skb); |
77fdaa12 JB |
1595 | break; |
1596 | case IEEE80211_STYPE_DEAUTH: | |
63f170e0 | 1597 | rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); |
77fdaa12 JB |
1598 | break; |
1599 | case IEEE80211_STYPE_DISASSOC: | |
1600 | rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); | |
1601 | break; | |
1602 | case IEEE80211_STYPE_ACTION: | |
d7907448 FF |
1603 | if (mgmt->u.action.category != WLAN_CATEGORY_SPECTRUM_MGMT) |
1604 | break; | |
1605 | ||
77fdaa12 JB |
1606 | ieee80211_sta_process_chanswitch(sdata, |
1607 | &mgmt->u.action.u.chan_switch.sw_elem, | |
0c1ad2ca | 1608 | (void *)ifmgd->associated->priv); |
77fdaa12 JB |
1609 | break; |
1610 | } | |
1611 | mutex_unlock(&ifmgd->mtx); | |
1612 | ||
1613 | switch (rma) { | |
1614 | case RX_MGMT_NONE: | |
1615 | /* no action */ | |
1616 | break; | |
1617 | case RX_MGMT_CFG80211_DEAUTH: | |
ce470613 | 1618 | cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len); |
77fdaa12 JB |
1619 | break; |
1620 | case RX_MGMT_CFG80211_DISASSOC: | |
ce470613 | 1621 | cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len); |
77fdaa12 JB |
1622 | break; |
1623 | default: | |
1624 | WARN(1, "unexpected: %d", rma); | |
1625 | } | |
1626 | goto out; | |
1627 | } | |
1628 | ||
77fdaa12 JB |
1629 | mutex_unlock(&ifmgd->mtx); |
1630 | ||
63f170e0 | 1631 | if (skb->len >= 24 + 2 /* mgmt + deauth reason */ && |
af6b6374 | 1632 | (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_DEAUTH) |
ce470613 | 1633 | cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len); |
f0706e82 | 1634 | |
77fdaa12 | 1635 | out: |
f0706e82 JB |
1636 | kfree_skb(skb); |
1637 | } | |
1638 | ||
9c6bd790 | 1639 | static void ieee80211_sta_timer(unsigned long data) |
f0706e82 | 1640 | { |
60f8b39c JB |
1641 | struct ieee80211_sub_if_data *sdata = |
1642 | (struct ieee80211_sub_if_data *) data; | |
46900298 | 1643 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
60f8b39c | 1644 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 1645 | |
5bb644a0 JB |
1646 | if (local->quiescing) { |
1647 | set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running); | |
1648 | return; | |
1649 | } | |
1650 | ||
42935eca | 1651 | ieee80211_queue_work(&local->hw, &ifmgd->work); |
f0706e82 JB |
1652 | } |
1653 | ||
9c6bd790 JB |
1654 | static void ieee80211_sta_work(struct work_struct *work) |
1655 | { | |
1656 | struct ieee80211_sub_if_data *sdata = | |
46900298 | 1657 | container_of(work, struct ieee80211_sub_if_data, u.mgd.work); |
9c6bd790 | 1658 | struct ieee80211_local *local = sdata->local; |
46900298 | 1659 | struct ieee80211_if_managed *ifmgd; |
9c6bd790 JB |
1660 | struct sk_buff *skb; |
1661 | ||
9607e6b6 | 1662 | if (!ieee80211_sdata_running(sdata)) |
9c6bd790 JB |
1663 | return; |
1664 | ||
fbe9c429 | 1665 | if (local->scanning) |
9c6bd790 JB |
1666 | return; |
1667 | ||
46900298 | 1668 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) |
9c6bd790 | 1669 | return; |
5bb644a0 JB |
1670 | |
1671 | /* | |
42935eca LR |
1672 | * ieee80211_queue_work() should have picked up most cases, |
1673 | * here we'll pick the the rest. | |
5bb644a0 | 1674 | */ |
42935eca LR |
1675 | if (WARN(local->suspended, "STA MLME work scheduled while " |
1676 | "going to suspend\n")) | |
5bb644a0 JB |
1677 | return; |
1678 | ||
46900298 | 1679 | ifmgd = &sdata->u.mgd; |
f0706e82 | 1680 | |
77fdaa12 | 1681 | /* first process frames to avoid timing out while a frame is pending */ |
46900298 | 1682 | while ((skb = skb_dequeue(&ifmgd->skb_queue))) |
9c6bd790 JB |
1683 | ieee80211_sta_rx_queued_mgmt(sdata, skb); |
1684 | ||
77fdaa12 JB |
1685 | /* then process the rest of the work */ |
1686 | mutex_lock(&ifmgd->mtx); | |
1687 | ||
b291ba11 JB |
1688 | if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL | |
1689 | IEEE80211_STA_CONNECTION_POLL) && | |
1690 | ifmgd->associated) { | |
a43abf29 ML |
1691 | u8 bssid[ETH_ALEN]; |
1692 | ||
0c1ad2ca | 1693 | memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); |
b291ba11 JB |
1694 | if (time_is_after_jiffies(ifmgd->probe_timeout)) |
1695 | run_again(ifmgd, ifmgd->probe_timeout); | |
a43abf29 ML |
1696 | |
1697 | else if (ifmgd->probe_send_count < IEEE80211_MAX_PROBE_TRIES) { | |
1698 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
1699 | printk(KERN_DEBUG "No probe response from AP %pM" | |
1700 | " after %dms, try %d\n", bssid, | |
1701 | (1000 * IEEE80211_PROBE_WAIT)/HZ, | |
1702 | ifmgd->probe_send_count); | |
1703 | #endif | |
1704 | ieee80211_mgd_probe_ap_send(sdata); | |
1705 | } else { | |
b291ba11 JB |
1706 | /* |
1707 | * We actually lost the connection ... or did we? | |
1708 | * Let's make sure! | |
1709 | */ | |
1710 | ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL | | |
1711 | IEEE80211_STA_BEACON_POLL); | |
b291ba11 JB |
1712 | printk(KERN_DEBUG "No probe response from AP %pM" |
1713 | " after %dms, disconnecting.\n", | |
1714 | bssid, (1000 * IEEE80211_PROBE_WAIT)/HZ); | |
63f170e0 | 1715 | ieee80211_set_disassoc(sdata); |
bc83b681 | 1716 | ieee80211_recalc_idle(local); |
b291ba11 JB |
1717 | mutex_unlock(&ifmgd->mtx); |
1718 | /* | |
1719 | * must be outside lock due to cfg80211, | |
1720 | * but that's not a problem. | |
1721 | */ | |
1722 | ieee80211_send_deauth_disassoc(sdata, bssid, | |
1723 | IEEE80211_STYPE_DEAUTH, | |
1724 | WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, | |
1725 | NULL); | |
1726 | mutex_lock(&ifmgd->mtx); | |
1727 | } | |
1728 | } | |
1729 | ||
77fdaa12 | 1730 | mutex_unlock(&ifmgd->mtx); |
f0706e82 JB |
1731 | } |
1732 | ||
b291ba11 JB |
1733 | static void ieee80211_sta_bcn_mon_timer(unsigned long data) |
1734 | { | |
1735 | struct ieee80211_sub_if_data *sdata = | |
1736 | (struct ieee80211_sub_if_data *) data; | |
1737 | struct ieee80211_local *local = sdata->local; | |
1738 | ||
1739 | if (local->quiescing) | |
1740 | return; | |
1741 | ||
1e4dcd01 JO |
1742 | ieee80211_queue_work(&sdata->local->hw, |
1743 | &sdata->u.mgd.beacon_connection_loss_work); | |
b291ba11 JB |
1744 | } |
1745 | ||
1746 | static void ieee80211_sta_conn_mon_timer(unsigned long data) | |
1747 | { | |
1748 | struct ieee80211_sub_if_data *sdata = | |
1749 | (struct ieee80211_sub_if_data *) data; | |
1750 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
1751 | struct ieee80211_local *local = sdata->local; | |
1752 | ||
1753 | if (local->quiescing) | |
1754 | return; | |
1755 | ||
42935eca | 1756 | ieee80211_queue_work(&local->hw, &ifmgd->monitor_work); |
b291ba11 JB |
1757 | } |
1758 | ||
1759 | static void ieee80211_sta_monitor_work(struct work_struct *work) | |
1760 | { | |
1761 | struct ieee80211_sub_if_data *sdata = | |
1762 | container_of(work, struct ieee80211_sub_if_data, | |
1763 | u.mgd.monitor_work); | |
1764 | ||
1765 | ieee80211_mgd_probe_ap(sdata, false); | |
1766 | } | |
1767 | ||
9c6bd790 JB |
1768 | static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) |
1769 | { | |
ad935687 | 1770 | if (sdata->vif.type == NL80211_IFTYPE_STATION) { |
b291ba11 JB |
1771 | sdata->u.mgd.flags &= ~(IEEE80211_STA_BEACON_POLL | |
1772 | IEEE80211_STA_CONNECTION_POLL); | |
ad935687 | 1773 | |
b291ba11 | 1774 | /* let's probe the connection once */ |
42935eca | 1775 | ieee80211_queue_work(&sdata->local->hw, |
b291ba11 JB |
1776 | &sdata->u.mgd.monitor_work); |
1777 | /* and do all the other regular work too */ | |
42935eca | 1778 | ieee80211_queue_work(&sdata->local->hw, |
46900298 | 1779 | &sdata->u.mgd.work); |
ad935687 | 1780 | } |
9c6bd790 | 1781 | } |
f0706e82 | 1782 | |
5bb644a0 JB |
1783 | #ifdef CONFIG_PM |
1784 | void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata) | |
1785 | { | |
1786 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
1787 | ||
1788 | /* | |
1789 | * we need to use atomic bitops for the running bits | |
1790 | * only because both timers might fire at the same | |
1791 | * time -- the code here is properly synchronised. | |
1792 | */ | |
1793 | ||
1794 | cancel_work_sync(&ifmgd->work); | |
1e4dcd01 | 1795 | cancel_work_sync(&ifmgd->beacon_connection_loss_work); |
5bb644a0 JB |
1796 | if (del_timer_sync(&ifmgd->timer)) |
1797 | set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running); | |
1798 | ||
1799 | cancel_work_sync(&ifmgd->chswitch_work); | |
1800 | if (del_timer_sync(&ifmgd->chswitch_timer)) | |
1801 | set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running); | |
b291ba11 JB |
1802 | |
1803 | cancel_work_sync(&ifmgd->monitor_work); | |
1804 | /* these will just be re-established on connection */ | |
1805 | del_timer_sync(&ifmgd->conn_mon_timer); | |
1806 | del_timer_sync(&ifmgd->bcn_mon_timer); | |
5bb644a0 JB |
1807 | } |
1808 | ||
1809 | void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) | |
1810 | { | |
1811 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
1812 | ||
1813 | if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running)) | |
1814 | add_timer(&ifmgd->timer); | |
1815 | if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running)) | |
1816 | add_timer(&ifmgd->chswitch_timer); | |
1817 | } | |
1818 | #endif | |
1819 | ||
9c6bd790 JB |
1820 | /* interface setup */ |
1821 | void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) | |
f0706e82 | 1822 | { |
46900298 | 1823 | struct ieee80211_if_managed *ifmgd; |
988c0f72 | 1824 | |
46900298 JB |
1825 | ifmgd = &sdata->u.mgd; |
1826 | INIT_WORK(&ifmgd->work, ieee80211_sta_work); | |
b291ba11 | 1827 | INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work); |
46900298 | 1828 | INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work); |
1e4dcd01 JO |
1829 | INIT_WORK(&ifmgd->beacon_connection_loss_work, |
1830 | ieee80211_beacon_connection_loss_work); | |
46900298 | 1831 | setup_timer(&ifmgd->timer, ieee80211_sta_timer, |
c481ec97 | 1832 | (unsigned long) sdata); |
b291ba11 JB |
1833 | setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, |
1834 | (unsigned long) sdata); | |
1835 | setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, | |
1836 | (unsigned long) sdata); | |
46900298 | 1837 | setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, |
9c6bd790 | 1838 | (unsigned long) sdata); |
46900298 | 1839 | skb_queue_head_init(&ifmgd->skb_queue); |
9c6bd790 | 1840 | |
ab1faead | 1841 | ifmgd->flags = 0; |
bbbdff9e | 1842 | |
77fdaa12 | 1843 | mutex_init(&ifmgd->mtx); |
0f78231b JB |
1844 | |
1845 | if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS) | |
1846 | ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC; | |
1847 | else | |
1848 | ifmgd->req_smps = IEEE80211_SMPS_OFF; | |
f0706e82 JB |
1849 | } |
1850 | ||
77fdaa12 JB |
1851 | /* scan finished notification */ |
1852 | void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) | |
60f8b39c | 1853 | { |
77fdaa12 | 1854 | struct ieee80211_sub_if_data *sdata = local->scan_sdata; |
60f8b39c | 1855 | |
77fdaa12 JB |
1856 | /* Restart STA timers */ |
1857 | rcu_read_lock(); | |
1858 | list_for_each_entry_rcu(sdata, &local->interfaces, list) | |
1859 | ieee80211_restart_sta_timer(sdata); | |
1860 | rcu_read_unlock(); | |
1861 | } | |
60f8b39c | 1862 | |
77fdaa12 JB |
1863 | int ieee80211_max_network_latency(struct notifier_block *nb, |
1864 | unsigned long data, void *dummy) | |
1865 | { | |
1866 | s32 latency_usec = (s32) data; | |
1867 | struct ieee80211_local *local = | |
1868 | container_of(nb, struct ieee80211_local, | |
1869 | network_latency_notifier); | |
1fa6f4af | 1870 | |
77fdaa12 JB |
1871 | mutex_lock(&local->iflist_mtx); |
1872 | ieee80211_recalc_ps(local, latency_usec); | |
1873 | mutex_unlock(&local->iflist_mtx); | |
dfe67012 | 1874 | |
77fdaa12 | 1875 | return 0; |
9c6bd790 JB |
1876 | } |
1877 | ||
77fdaa12 | 1878 | /* config hooks */ |
af6b6374 JB |
1879 | static enum work_done_result |
1880 | ieee80211_probe_auth_done(struct ieee80211_work *wk, | |
1881 | struct sk_buff *skb) | |
1882 | { | |
1883 | if (!skb) { | |
1884 | cfg80211_send_auth_timeout(wk->sdata->dev, wk->filter_ta); | |
1885 | return WORK_DONE_DESTROY; | |
1886 | } | |
1887 | ||
1888 | if (wk->type == IEEE80211_WORK_AUTH) { | |
1889 | cfg80211_send_rx_auth(wk->sdata->dev, skb->data, skb->len); | |
1890 | return WORK_DONE_DESTROY; | |
1891 | } | |
1892 | ||
1893 | mutex_lock(&wk->sdata->u.mgd.mtx); | |
1894 | ieee80211_rx_mgmt_probe_resp(wk->sdata, skb); | |
1895 | mutex_unlock(&wk->sdata->u.mgd.mtx); | |
1896 | ||
1897 | wk->type = IEEE80211_WORK_AUTH; | |
1898 | wk->probe_auth.tries = 0; | |
1899 | return WORK_DONE_REQUEUE; | |
1900 | } | |
1901 | ||
77fdaa12 JB |
1902 | int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, |
1903 | struct cfg80211_auth_request *req) | |
9c6bd790 | 1904 | { |
77fdaa12 | 1905 | const u8 *ssid; |
f679f65d | 1906 | struct ieee80211_work *wk; |
77fdaa12 | 1907 | u16 auth_alg; |
9c6bd790 | 1908 | |
77fdaa12 JB |
1909 | switch (req->auth_type) { |
1910 | case NL80211_AUTHTYPE_OPEN_SYSTEM: | |
1911 | auth_alg = WLAN_AUTH_OPEN; | |
1912 | break; | |
1913 | case NL80211_AUTHTYPE_SHARED_KEY: | |
1914 | auth_alg = WLAN_AUTH_SHARED_KEY; | |
1915 | break; | |
1916 | case NL80211_AUTHTYPE_FT: | |
1917 | auth_alg = WLAN_AUTH_FT; | |
1918 | break; | |
1919 | case NL80211_AUTHTYPE_NETWORK_EAP: | |
1920 | auth_alg = WLAN_AUTH_LEAP; | |
1921 | break; | |
1922 | default: | |
1923 | return -EOPNOTSUPP; | |
60f8b39c | 1924 | } |
77fdaa12 JB |
1925 | |
1926 | wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL); | |
1927 | if (!wk) | |
9c6bd790 | 1928 | return -ENOMEM; |
77fdaa12 | 1929 | |
5e124bd5 | 1930 | memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN); |
77fdaa12 JB |
1931 | |
1932 | if (req->ie && req->ie_len) { | |
1933 | memcpy(wk->ie, req->ie, req->ie_len); | |
1934 | wk->ie_len = req->ie_len; | |
9c6bd790 | 1935 | } |
77fdaa12 | 1936 | |
fffd0934 | 1937 | if (req->key && req->key_len) { |
af6b6374 JB |
1938 | wk->probe_auth.key_len = req->key_len; |
1939 | wk->probe_auth.key_idx = req->key_idx; | |
1940 | memcpy(wk->probe_auth.key, req->key, req->key_len); | |
fffd0934 JB |
1941 | } |
1942 | ||
77fdaa12 | 1943 | ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID); |
af6b6374 JB |
1944 | memcpy(wk->probe_auth.ssid, ssid + 2, ssid[1]); |
1945 | wk->probe_auth.ssid_len = ssid[1]; | |
f679f65d | 1946 | |
af6b6374 JB |
1947 | wk->probe_auth.algorithm = auth_alg; |
1948 | wk->probe_auth.privacy = req->bss->capability & WLAN_CAPABILITY_PRIVACY; | |
77fdaa12 | 1949 | |
070bb547 JB |
1950 | /* if we already have a probe, don't probe again */ |
1951 | if (req->bss->proberesp_ies) | |
1952 | wk->type = IEEE80211_WORK_AUTH; | |
1953 | else | |
1954 | wk->type = IEEE80211_WORK_DIRECT_PROBE; | |
f679f65d | 1955 | wk->chan = req->bss->channel; |
af6b6374 JB |
1956 | wk->sdata = sdata; |
1957 | wk->done = ieee80211_probe_auth_done; | |
77fdaa12 | 1958 | |
af6b6374 | 1959 | ieee80211_add_work(wk); |
9c6bd790 | 1960 | return 0; |
60f8b39c JB |
1961 | } |
1962 | ||
af6b6374 JB |
1963 | static enum work_done_result ieee80211_assoc_done(struct ieee80211_work *wk, |
1964 | struct sk_buff *skb) | |
1965 | { | |
1966 | struct ieee80211_mgmt *mgmt; | |
1967 | u16 status; | |
1968 | ||
1969 | if (!skb) { | |
1970 | cfg80211_send_assoc_timeout(wk->sdata->dev, wk->filter_ta); | |
1971 | return WORK_DONE_DESTROY; | |
1972 | } | |
1973 | ||
1974 | mgmt = (void *)skb->data; | |
1975 | status = le16_to_cpu(mgmt->u.assoc_resp.status_code); | |
1976 | ||
1977 | if (status == WLAN_STATUS_SUCCESS) { | |
1978 | mutex_lock(&wk->sdata->u.mgd.mtx); | |
1979 | if (!ieee80211_assoc_success(wk, mgmt, skb->len)) { | |
1980 | mutex_unlock(&wk->sdata->u.mgd.mtx); | |
1981 | /* oops -- internal error -- send timeout for now */ | |
1982 | cfg80211_send_assoc_timeout(wk->sdata->dev, | |
1983 | wk->filter_ta); | |
1984 | return WORK_DONE_DESTROY; | |
1985 | } | |
1986 | mutex_unlock(&wk->sdata->u.mgd.mtx); | |
1987 | } | |
1988 | ||
1989 | cfg80211_send_rx_assoc(wk->sdata->dev, skb->data, skb->len); | |
1990 | return WORK_DONE_DESTROY; | |
1991 | } | |
1992 | ||
77fdaa12 JB |
1993 | int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, |
1994 | struct cfg80211_assoc_request *req) | |
f0706e82 | 1995 | { |
77fdaa12 | 1996 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
0c1ad2ca | 1997 | struct ieee80211_bss *bss = (void *)req->bss->priv; |
f679f65d | 1998 | struct ieee80211_work *wk; |
63f170e0 | 1999 | const u8 *ssid; |
af6b6374 | 2000 | int i; |
f0706e82 | 2001 | |
77fdaa12 | 2002 | mutex_lock(&ifmgd->mtx); |
af6b6374 | 2003 | if (ifmgd->associated) { |
9c87ba67 JM |
2004 | if (!req->prev_bssid || |
2005 | memcmp(req->prev_bssid, ifmgd->associated->bssid, | |
2006 | ETH_ALEN)) { | |
2007 | /* | |
2008 | * We are already associated and the request was not a | |
2009 | * reassociation request from the current BSS, so | |
2010 | * reject it. | |
2011 | */ | |
2012 | mutex_unlock(&ifmgd->mtx); | |
2013 | return -EALREADY; | |
2014 | } | |
2015 | ||
2016 | /* Trying to reassociate - clear previous association state */ | |
2017 | ieee80211_set_disassoc(sdata); | |
af6b6374 JB |
2018 | } |
2019 | mutex_unlock(&ifmgd->mtx); | |
77fdaa12 | 2020 | |
63f170e0 | 2021 | wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL); |
af6b6374 JB |
2022 | if (!wk) |
2023 | return -ENOMEM; | |
77fdaa12 | 2024 | |
77fdaa12 | 2025 | ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N; |
375177bf | 2026 | ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; |
77fdaa12 JB |
2027 | |
2028 | for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) | |
2029 | if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || | |
2030 | req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || | |
2031 | req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) | |
2032 | ifmgd->flags |= IEEE80211_STA_DISABLE_11N; | |
2033 | ||
77fdaa12 JB |
2034 | |
2035 | if (req->ie && req->ie_len) { | |
2036 | memcpy(wk->ie, req->ie, req->ie_len); | |
2037 | wk->ie_len = req->ie_len; | |
2038 | } else | |
2039 | wk->ie_len = 0; | |
2040 | ||
0c1ad2ca | 2041 | wk->assoc.bss = req->bss; |
f679f65d | 2042 | |
af6b6374 | 2043 | memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN); |
f679f65d | 2044 | |
af6b6374 JB |
2045 | /* new association always uses requested smps mode */ |
2046 | if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) { | |
2047 | if (ifmgd->powersave) | |
2048 | ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC; | |
2049 | else | |
2050 | ifmgd->ap_smps = IEEE80211_SMPS_OFF; | |
2051 | } else | |
2052 | ifmgd->ap_smps = ifmgd->req_smps; | |
2053 | ||
2054 | wk->assoc.smps = ifmgd->ap_smps; | |
77c8144a JB |
2055 | /* |
2056 | * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode. | |
2057 | * We still associate in non-HT mode (11a/b/g) if any one of these | |
2058 | * ciphers is configured as pairwise. | |
2059 | * We can set this to true for non-11n hardware, that'll be checked | |
2060 | * separately along with the peer capabilities. | |
2061 | */ | |
af6b6374 | 2062 | wk->assoc.use_11n = !(ifmgd->flags & IEEE80211_STA_DISABLE_11N); |
f679f65d | 2063 | wk->assoc.capability = req->bss->capability; |
0c1ad2ca JB |
2064 | wk->assoc.wmm_used = bss->wmm_used; |
2065 | wk->assoc.supp_rates = bss->supp_rates; | |
2066 | wk->assoc.supp_rates_len = bss->supp_rates_len; | |
f679f65d JB |
2067 | wk->assoc.ht_information_ie = |
2068 | ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_INFORMATION); | |
63f170e0 | 2069 | |
ab13315a KV |
2070 | if (bss->wmm_used && bss->uapsd_supported && |
2071 | (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) { | |
2072 | wk->assoc.uapsd_used = true; | |
2073 | ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; | |
2074 | } else { | |
2075 | wk->assoc.uapsd_used = false; | |
2076 | ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; | |
2077 | } | |
2078 | ||
63f170e0 | 2079 | ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID); |
f679f65d JB |
2080 | memcpy(wk->assoc.ssid, ssid + 2, ssid[1]); |
2081 | wk->assoc.ssid_len = ssid[1]; | |
63f170e0 | 2082 | |
77fdaa12 | 2083 | if (req->prev_bssid) |
f679f65d | 2084 | memcpy(wk->assoc.prev_bssid, req->prev_bssid, ETH_ALEN); |
77fdaa12 | 2085 | |
f679f65d | 2086 | wk->type = IEEE80211_WORK_ASSOC; |
f679f65d | 2087 | wk->chan = req->bss->channel; |
af6b6374 JB |
2088 | wk->sdata = sdata; |
2089 | wk->done = ieee80211_assoc_done; | |
77fdaa12 JB |
2090 | |
2091 | if (req->use_mfp) { | |
2092 | ifmgd->mfp = IEEE80211_MFP_REQUIRED; | |
2093 | ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; | |
2094 | } else { | |
2095 | ifmgd->mfp = IEEE80211_MFP_DISABLED; | |
2096 | ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; | |
2097 | } | |
2098 | ||
2099 | if (req->crypto.control_port) | |
2100 | ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; | |
2101 | else | |
2102 | ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; | |
2103 | ||
af6b6374 JB |
2104 | ieee80211_add_work(wk); |
2105 | return 0; | |
f0706e82 JB |
2106 | } |
2107 | ||
77fdaa12 | 2108 | int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, |
667503dd JB |
2109 | struct cfg80211_deauth_request *req, |
2110 | void *cookie) | |
f0706e82 | 2111 | { |
af6b6374 | 2112 | struct ieee80211_local *local = sdata->local; |
46900298 | 2113 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f679f65d | 2114 | struct ieee80211_work *wk; |
63f170e0 | 2115 | const u8 *bssid = req->bss->bssid; |
f0706e82 | 2116 | |
77fdaa12 JB |
2117 | mutex_lock(&ifmgd->mtx); |
2118 | ||
0c1ad2ca | 2119 | if (ifmgd->associated == req->bss) { |
77fdaa12 | 2120 | bssid = req->bss->bssid; |
63f170e0 | 2121 | ieee80211_set_disassoc(sdata); |
af6b6374 JB |
2122 | mutex_unlock(&ifmgd->mtx); |
2123 | } else { | |
2124 | bool not_auth_yet = false; | |
f0706e82 | 2125 | |
a58ce43f | 2126 | mutex_unlock(&ifmgd->mtx); |
a58ce43f | 2127 | |
af6b6374 JB |
2128 | mutex_lock(&local->work_mtx); |
2129 | list_for_each_entry(wk, &local->work_list, list) { | |
29165e4c | 2130 | if (wk->sdata != sdata) |
af6b6374 | 2131 | continue; |
29165e4c JB |
2132 | |
2133 | if (wk->type != IEEE80211_WORK_DIRECT_PROBE && | |
2134 | wk->type != IEEE80211_WORK_AUTH) | |
2135 | continue; | |
2136 | ||
af6b6374 JB |
2137 | if (memcmp(req->bss->bssid, wk->filter_ta, ETH_ALEN)) |
2138 | continue; | |
29165e4c JB |
2139 | |
2140 | not_auth_yet = wk->type == IEEE80211_WORK_DIRECT_PROBE; | |
2141 | list_del_rcu(&wk->list); | |
af6b6374 JB |
2142 | free_work(wk); |
2143 | break; | |
2144 | } | |
2145 | mutex_unlock(&local->work_mtx); | |
2146 | ||
2147 | /* | |
2148 | * If somebody requests authentication and we haven't | |
2149 | * sent out an auth frame yet there's no need to send | |
2150 | * out a deauth frame either. If the state was PROBE, | |
2151 | * then this is the case. If it's AUTH we have sent a | |
2152 | * frame, and if it's IDLE we have completed the auth | |
2153 | * process already. | |
2154 | */ | |
2155 | if (not_auth_yet) { | |
2156 | __cfg80211_auth_canceled(sdata->dev, bssid); | |
2157 | return 0; | |
2158 | } | |
2159 | } | |
77fdaa12 | 2160 | |
0ff71613 | 2161 | printk(KERN_DEBUG "%s: deauthenticating from %pM by local choice (reason=%d)\n", |
47846c9b | 2162 | sdata->name, bssid, req->reason_code); |
0ff71613 | 2163 | |
77fdaa12 | 2164 | ieee80211_send_deauth_disassoc(sdata, bssid, |
667503dd JB |
2165 | IEEE80211_STYPE_DEAUTH, req->reason_code, |
2166 | cookie); | |
f0706e82 | 2167 | |
bc83b681 JB |
2168 | ieee80211_recalc_idle(sdata->local); |
2169 | ||
f0706e82 JB |
2170 | return 0; |
2171 | } | |
84363e6e | 2172 | |
77fdaa12 | 2173 | int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, |
667503dd JB |
2174 | struct cfg80211_disassoc_request *req, |
2175 | void *cookie) | |
9c6bd790 | 2176 | { |
77fdaa12 | 2177 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
9c6bd790 | 2178 | |
77fdaa12 | 2179 | mutex_lock(&ifmgd->mtx); |
10f644a4 | 2180 | |
8d8b261a JB |
2181 | /* |
2182 | * cfg80211 should catch this ... but it's racy since | |
2183 | * we can receive a disassoc frame, process it, hand it | |
2184 | * to cfg80211 while that's in a locked section already | |
2185 | * trying to tell us that the user wants to disconnect. | |
2186 | */ | |
0c1ad2ca | 2187 | if (ifmgd->associated != req->bss) { |
77fdaa12 JB |
2188 | mutex_unlock(&ifmgd->mtx); |
2189 | return -ENOLINK; | |
2190 | } | |
2191 | ||
0ff71613 | 2192 | printk(KERN_DEBUG "%s: disassociating from %pM by local choice (reason=%d)\n", |
47846c9b | 2193 | sdata->name, req->bss->bssid, req->reason_code); |
0ff71613 | 2194 | |
63f170e0 | 2195 | ieee80211_set_disassoc(sdata); |
77fdaa12 JB |
2196 | |
2197 | mutex_unlock(&ifmgd->mtx); | |
10f644a4 | 2198 | |
77fdaa12 | 2199 | ieee80211_send_deauth_disassoc(sdata, req->bss->bssid, |
667503dd JB |
2200 | IEEE80211_STYPE_DISASSOC, req->reason_code, |
2201 | cookie); | |
bc83b681 JB |
2202 | |
2203 | ieee80211_recalc_idle(sdata->local); | |
2204 | ||
10f644a4 JB |
2205 | return 0; |
2206 | } | |
026331c4 JM |
2207 | |
2208 | int ieee80211_mgd_action(struct ieee80211_sub_if_data *sdata, | |
2209 | struct ieee80211_channel *chan, | |
2210 | enum nl80211_channel_type channel_type, | |
2211 | const u8 *buf, size_t len, u64 *cookie) | |
2212 | { | |
2213 | struct ieee80211_local *local = sdata->local; | |
2214 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
2215 | struct sk_buff *skb; | |
2216 | ||
2217 | /* Check that we are on the requested channel for transmission */ | |
2218 | if ((chan != local->tmp_channel || | |
2219 | channel_type != local->tmp_channel_type) && | |
2220 | (chan != local->oper_channel || | |
2221 | channel_type != local->oper_channel_type)) | |
2222 | return -EBUSY; | |
2223 | ||
2224 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + len); | |
2225 | if (!skb) | |
2226 | return -ENOMEM; | |
2227 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
2228 | ||
2229 | memcpy(skb_put(skb, len), buf, len); | |
2230 | ||
2231 | if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED)) | |
2232 | IEEE80211_SKB_CB(skb)->flags |= | |
2233 | IEEE80211_TX_INTFL_DONT_ENCRYPT; | |
2234 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_NL80211_FRAME_TX | | |
2235 | IEEE80211_TX_CTL_REQ_TX_STATUS; | |
2236 | skb->dev = sdata->dev; | |
2237 | ieee80211_tx_skb(sdata, skb); | |
2238 | ||
2239 | *cookie = (unsigned long) skb; | |
2240 | return 0; | |
2241 | } | |
a97c13c3 JO |
2242 | |
2243 | void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, | |
2244 | enum nl80211_cqm_rssi_threshold_event rssi_event, | |
2245 | gfp_t gfp) | |
2246 | { | |
2247 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
2248 | ||
2249 | cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp); | |
2250 | } | |
2251 | EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); |