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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> |
d9b93842 | 19 | #include <linux/moduleparam.h> |
d0709a65 | 20 | #include <linux/rtnetlink.h> |
e8db0be1 | 21 | #include <linux/pm_qos.h> |
d91f36db | 22 | #include <linux/crc32.h> |
5a0e3ad6 | 23 | #include <linux/slab.h> |
bc3b2d7f | 24 | #include <linux/export.h> |
f0706e82 | 25 | #include <net/mac80211.h> |
472dbc45 | 26 | #include <asm/unaligned.h> |
60f8b39c | 27 | |
f0706e82 | 28 | #include "ieee80211_i.h" |
24487981 | 29 | #include "driver-ops.h" |
2c8dccc7 JB |
30 | #include "rate.h" |
31 | #include "led.h" | |
f0706e82 | 32 | |
66e67e41 JB |
33 | #define IEEE80211_AUTH_TIMEOUT (HZ / 5) |
34 | #define IEEE80211_AUTH_MAX_TRIES 3 | |
35 | #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5) | |
36 | #define IEEE80211_ASSOC_TIMEOUT (HZ / 5) | |
37 | #define IEEE80211_ASSOC_MAX_TRIES 3 | |
38 | ||
180205bd BG |
39 | static int max_nullfunc_tries = 2; |
40 | module_param(max_nullfunc_tries, int, 0644); | |
41 | MODULE_PARM_DESC(max_nullfunc_tries, | |
42 | "Maximum nullfunc tx tries before disconnecting (reason 4)."); | |
43 | ||
44 | static int max_probe_tries = 5; | |
45 | module_param(max_probe_tries, int, 0644); | |
46 | MODULE_PARM_DESC(max_probe_tries, | |
47 | "Maximum probe tries before disconnecting (reason 4)."); | |
b291ba11 JB |
48 | |
49 | /* | |
7ccc8bd7 FF |
50 | * Beacon loss timeout is calculated as N frames times the |
51 | * advertised beacon interval. This may need to be somewhat | |
52 | * higher than what hardware might detect to account for | |
53 | * delays in the host processing frames. But since we also | |
54 | * probe on beacon miss before declaring the connection lost | |
55 | * default to what we want. | |
b291ba11 | 56 | */ |
7ccc8bd7 FF |
57 | #define IEEE80211_BEACON_LOSS_COUNT 7 |
58 | ||
b291ba11 JB |
59 | /* |
60 | * Time the connection can be idle before we probe | |
61 | * it to see if we can still talk to the AP. | |
62 | */ | |
d1c5091f | 63 | #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ) |
b291ba11 JB |
64 | /* |
65 | * Time we wait for a probe response after sending | |
66 | * a probe request because of beacon loss or for | |
67 | * checking the connection still works. | |
68 | */ | |
180205bd BG |
69 | static int probe_wait_ms = 500; |
70 | module_param(probe_wait_ms, int, 0644); | |
71 | MODULE_PARM_DESC(probe_wait_ms, | |
72 | "Maximum time(ms) to wait for probe response" | |
73 | " before disconnecting (reason 4)."); | |
f0706e82 | 74 | |
17e4ec14 JM |
75 | /* |
76 | * Weight given to the latest Beacon frame when calculating average signal | |
77 | * strength for Beacon frames received in the current BSS. This must be | |
78 | * between 1 and 15. | |
79 | */ | |
80 | #define IEEE80211_SIGNAL_AVE_WEIGHT 3 | |
81 | ||
391a200a JM |
82 | /* |
83 | * How many Beacon frames need to have been used in average signal strength | |
84 | * before starting to indicate signal change events. | |
85 | */ | |
86 | #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4 | |
87 | ||
5bb644a0 JB |
88 | #define TMR_RUNNING_TIMER 0 |
89 | #define TMR_RUNNING_CHANSW 1 | |
90 | ||
77fdaa12 JB |
91 | /* |
92 | * All cfg80211 functions have to be called outside a locked | |
93 | * section so that they can acquire a lock themselves... This | |
94 | * is much simpler than queuing up things in cfg80211, but we | |
95 | * do need some indirection for that here. | |
96 | */ | |
97 | enum rx_mgmt_action { | |
98 | /* no action required */ | |
99 | RX_MGMT_NONE, | |
100 | ||
77fdaa12 JB |
101 | /* caller must call cfg80211_send_deauth() */ |
102 | RX_MGMT_CFG80211_DEAUTH, | |
103 | ||
104 | /* caller must call cfg80211_send_disassoc() */ | |
105 | RX_MGMT_CFG80211_DISASSOC, | |
66e67e41 JB |
106 | |
107 | /* caller must call cfg80211_send_rx_auth() */ | |
108 | RX_MGMT_CFG80211_RX_AUTH, | |
109 | ||
110 | /* caller must call cfg80211_send_rx_assoc() */ | |
111 | RX_MGMT_CFG80211_RX_ASSOC, | |
112 | ||
113 | /* caller must call cfg80211_send_assoc_timeout() */ | |
114 | RX_MGMT_CFG80211_ASSOC_TIMEOUT, | |
77fdaa12 JB |
115 | }; |
116 | ||
5484e237 | 117 | /* utils */ |
77fdaa12 JB |
118 | static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd) |
119 | { | |
46a5ebaf | 120 | lockdep_assert_held(&ifmgd->mtx); |
77fdaa12 JB |
121 | } |
122 | ||
ca386f31 JB |
123 | /* |
124 | * We can have multiple work items (and connection probing) | |
125 | * scheduling this timer, but we need to take care to only | |
126 | * reschedule it when it should fire _earlier_ than it was | |
127 | * asked for before, or if it's not pending right now. This | |
128 | * function ensures that. Note that it then is required to | |
129 | * run this function for all timeouts after the first one | |
130 | * has happened -- the work that runs from this timer will | |
131 | * do that. | |
132 | */ | |
66e67e41 | 133 | static void run_again(struct ieee80211_if_managed *ifmgd, unsigned long timeout) |
ca386f31 JB |
134 | { |
135 | ASSERT_MGD_MTX(ifmgd); | |
136 | ||
137 | if (!timer_pending(&ifmgd->timer) || | |
138 | time_before(timeout, ifmgd->timer.expires)) | |
139 | mod_timer(&ifmgd->timer, timeout); | |
140 | } | |
141 | ||
d3a910a8 | 142 | void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata) |
b291ba11 | 143 | { |
c1288b12 | 144 | if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) |
b291ba11 JB |
145 | return; |
146 | ||
147 | mod_timer(&sdata->u.mgd.bcn_mon_timer, | |
7ccc8bd7 | 148 | round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout)); |
b291ba11 JB |
149 | } |
150 | ||
be099e82 LR |
151 | void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata) |
152 | { | |
0c699c3a LR |
153 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
154 | ||
8628172f SG |
155 | if (unlikely(!sdata->u.mgd.associated)) |
156 | return; | |
157 | ||
be099e82 LR |
158 | if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR) |
159 | return; | |
160 | ||
161 | mod_timer(&sdata->u.mgd.conn_mon_timer, | |
162 | round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME)); | |
0c699c3a LR |
163 | |
164 | ifmgd->probe_send_count = 0; | |
be099e82 LR |
165 | } |
166 | ||
5484e237 | 167 | static int ecw2cw(int ecw) |
60f8b39c | 168 | { |
5484e237 | 169 | return (1 << ecw) - 1; |
60f8b39c JB |
170 | } |
171 | ||
d5522e03 JB |
172 | /* |
173 | * ieee80211_enable_ht should be called only after the operating band | |
174 | * has been determined as ht configuration depends on the hw's | |
175 | * HT abilities for a specific band. | |
176 | */ | |
177 | static u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata, | |
178 | struct ieee80211_ht_info *hti, | |
7cc44ed4 RM |
179 | const u8 *bssid, u16 ap_ht_cap_flags, |
180 | bool beacon_htcap_ie) | |
d5522e03 JB |
181 | { |
182 | struct ieee80211_local *local = sdata->local; | |
183 | struct ieee80211_supported_band *sband; | |
d5522e03 JB |
184 | struct sta_info *sta; |
185 | u32 changed = 0; | |
172710bf | 186 | int hti_cfreq; |
9ed6bcce | 187 | u16 ht_opmode; |
0aaffa9b JB |
188 | bool enable_ht = true; |
189 | enum nl80211_channel_type prev_chantype; | |
d5522e03 JB |
190 | enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT; |
191 | ||
192 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
193 | ||
0aaffa9b JB |
194 | prev_chantype = sdata->vif.bss_conf.channel_type; |
195 | ||
d5522e03 JB |
196 | /* HT is not supported */ |
197 | if (!sband->ht_cap.ht_supported) | |
198 | enable_ht = false; | |
199 | ||
172710bf BG |
200 | if (enable_ht) { |
201 | hti_cfreq = ieee80211_channel_to_frequency(hti->control_chan, | |
202 | sband->band); | |
203 | /* check that channel matches the right operating channel */ | |
204 | if (local->hw.conf.channel->center_freq != hti_cfreq) { | |
205 | /* Some APs mess this up, evidently. | |
206 | * Netgear WNDR3700 sometimes reports 4 higher than | |
207 | * the actual channel, for instance. | |
208 | */ | |
209 | printk(KERN_DEBUG | |
210 | "%s: Wrong control channel in association" | |
211 | " response: configured center-freq: %d" | |
212 | " hti-cfreq: %d hti->control_chan: %d" | |
213 | " band: %d. Disabling HT.\n", | |
214 | sdata->name, | |
215 | local->hw.conf.channel->center_freq, | |
216 | hti_cfreq, hti->control_chan, | |
217 | sband->band); | |
218 | enable_ht = false; | |
219 | } | |
220 | } | |
d5522e03 JB |
221 | |
222 | if (enable_ht) { | |
223 | channel_type = NL80211_CHAN_HT20; | |
224 | ||
225 | if (!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) && | |
ef96a842 | 226 | !ieee80111_cfg_override_disables_ht40(sdata) && |
d5522e03 JB |
227 | (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) && |
228 | (hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) { | |
229 | switch(hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { | |
230 | case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: | |
768777ea LR |
231 | if (!(local->hw.conf.channel->flags & |
232 | IEEE80211_CHAN_NO_HT40PLUS)) | |
233 | channel_type = NL80211_CHAN_HT40PLUS; | |
d5522e03 JB |
234 | break; |
235 | case IEEE80211_HT_PARAM_CHA_SEC_BELOW: | |
768777ea LR |
236 | if (!(local->hw.conf.channel->flags & |
237 | IEEE80211_CHAN_NO_HT40MINUS)) | |
238 | channel_type = NL80211_CHAN_HT40MINUS; | |
d5522e03 JB |
239 | break; |
240 | } | |
241 | } | |
242 | } | |
243 | ||
fe6f212c RC |
244 | if (local->tmp_channel) |
245 | local->tmp_channel_type = channel_type; | |
d5522e03 | 246 | |
0aaffa9b JB |
247 | if (!ieee80211_set_channel_type(local, sdata, channel_type)) { |
248 | /* can only fail due to HT40+/- mismatch */ | |
249 | channel_type = NL80211_CHAN_HT20; | |
250 | WARN_ON(!ieee80211_set_channel_type(local, sdata, channel_type)); | |
251 | } | |
d5522e03 | 252 | |
7cc44ed4 RM |
253 | if (beacon_htcap_ie && (prev_chantype != channel_type)) { |
254 | /* | |
255 | * Whenever the AP announces the HT mode change that can be | |
256 | * 40MHz intolerant or etc., it would be safer to stop tx | |
257 | * queues before doing hw config to avoid buffer overflow. | |
258 | */ | |
259 | ieee80211_stop_queues_by_reason(&sdata->local->hw, | |
260 | IEEE80211_QUEUE_STOP_REASON_CHTYPE_CHANGE); | |
261 | ||
262 | /* flush out all packets */ | |
263 | synchronize_net(); | |
264 | ||
265 | drv_flush(local, false); | |
266 | } | |
267 | ||
0aaffa9b JB |
268 | /* channel_type change automatically detected */ |
269 | ieee80211_hw_config(local, 0); | |
d5522e03 | 270 | |
0aaffa9b | 271 | if (prev_chantype != channel_type) { |
d5522e03 | 272 | rcu_read_lock(); |
abe60632 | 273 | sta = sta_info_get(sdata, bssid); |
d5522e03 JB |
274 | if (sta) |
275 | rate_control_rate_update(local, sband, sta, | |
4fa00437 | 276 | IEEE80211_RC_HT_CHANGED, |
0aaffa9b | 277 | channel_type); |
d5522e03 | 278 | rcu_read_unlock(); |
7cc44ed4 RM |
279 | |
280 | if (beacon_htcap_ie) | |
281 | ieee80211_wake_queues_by_reason(&sdata->local->hw, | |
282 | IEEE80211_QUEUE_STOP_REASON_CHTYPE_CHANGE); | |
0aaffa9b | 283 | } |
d5522e03 | 284 | |
9ed6bcce | 285 | ht_opmode = le16_to_cpu(hti->operation_mode); |
d5522e03 JB |
286 | |
287 | /* if bss configuration changed store the new one */ | |
0aaffa9b JB |
288 | if (sdata->ht_opmode_valid != enable_ht || |
289 | sdata->vif.bss_conf.ht_operation_mode != ht_opmode || | |
290 | prev_chantype != channel_type) { | |
d5522e03 | 291 | changed |= BSS_CHANGED_HT; |
9ed6bcce | 292 | sdata->vif.bss_conf.ht_operation_mode = ht_opmode; |
0aaffa9b | 293 | sdata->ht_opmode_valid = enable_ht; |
d5522e03 JB |
294 | } |
295 | ||
296 | return changed; | |
297 | } | |
298 | ||
9c6bd790 JB |
299 | /* frame sending functions */ |
300 | ||
66e67e41 JB |
301 | static int ieee80211_compatible_rates(const u8 *supp_rates, int supp_rates_len, |
302 | struct ieee80211_supported_band *sband, | |
303 | u32 *rates) | |
304 | { | |
305 | int i, j, count; | |
306 | *rates = 0; | |
307 | count = 0; | |
308 | for (i = 0; i < supp_rates_len; i++) { | |
309 | int rate = (supp_rates[i] & 0x7F) * 5; | |
310 | ||
311 | for (j = 0; j < sband->n_bitrates; j++) | |
312 | if (sband->bitrates[j].bitrate == rate) { | |
313 | *rates |= BIT(j); | |
314 | count++; | |
315 | break; | |
316 | } | |
317 | } | |
318 | ||
319 | return count; | |
320 | } | |
321 | ||
322 | static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata, | |
323 | struct sk_buff *skb, const u8 *ht_info_ie, | |
324 | struct ieee80211_supported_band *sband, | |
325 | struct ieee80211_channel *channel, | |
326 | enum ieee80211_smps_mode smps) | |
327 | { | |
328 | struct ieee80211_ht_info *ht_info; | |
329 | u8 *pos; | |
330 | u32 flags = channel->flags; | |
331 | u16 cap; | |
332 | struct ieee80211_sta_ht_cap ht_cap; | |
333 | ||
334 | BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap)); | |
335 | ||
336 | if (!sband->ht_cap.ht_supported) | |
337 | return; | |
338 | ||
339 | if (!ht_info_ie) | |
340 | return; | |
341 | ||
342 | if (ht_info_ie[1] < sizeof(struct ieee80211_ht_info)) | |
343 | return; | |
344 | ||
345 | memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); | |
346 | ieee80211_apply_htcap_overrides(sdata, &ht_cap); | |
347 | ||
348 | ht_info = (struct ieee80211_ht_info *)(ht_info_ie + 2); | |
349 | ||
350 | /* determine capability flags */ | |
351 | cap = ht_cap.cap; | |
352 | ||
353 | switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { | |
354 | case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: | |
355 | if (flags & IEEE80211_CHAN_NO_HT40PLUS) { | |
356 | cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; | |
357 | cap &= ~IEEE80211_HT_CAP_SGI_40; | |
358 | } | |
359 | break; | |
360 | case IEEE80211_HT_PARAM_CHA_SEC_BELOW: | |
361 | if (flags & IEEE80211_CHAN_NO_HT40MINUS) { | |
362 | cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; | |
363 | cap &= ~IEEE80211_HT_CAP_SGI_40; | |
364 | } | |
365 | break; | |
366 | } | |
367 | ||
368 | /* set SM PS mode properly */ | |
369 | cap &= ~IEEE80211_HT_CAP_SM_PS; | |
370 | switch (smps) { | |
371 | case IEEE80211_SMPS_AUTOMATIC: | |
372 | case IEEE80211_SMPS_NUM_MODES: | |
373 | WARN_ON(1); | |
374 | case IEEE80211_SMPS_OFF: | |
375 | cap |= WLAN_HT_CAP_SM_PS_DISABLED << | |
376 | IEEE80211_HT_CAP_SM_PS_SHIFT; | |
377 | break; | |
378 | case IEEE80211_SMPS_STATIC: | |
379 | cap |= WLAN_HT_CAP_SM_PS_STATIC << | |
380 | IEEE80211_HT_CAP_SM_PS_SHIFT; | |
381 | break; | |
382 | case IEEE80211_SMPS_DYNAMIC: | |
383 | cap |= WLAN_HT_CAP_SM_PS_DYNAMIC << | |
384 | IEEE80211_HT_CAP_SM_PS_SHIFT; | |
385 | break; | |
386 | } | |
387 | ||
388 | /* reserve and fill IE */ | |
389 | pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2); | |
390 | ieee80211_ie_build_ht_cap(pos, &ht_cap, cap); | |
391 | } | |
392 | ||
393 | static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) | |
394 | { | |
395 | struct ieee80211_local *local = sdata->local; | |
396 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
397 | struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; | |
398 | struct sk_buff *skb; | |
399 | struct ieee80211_mgmt *mgmt; | |
400 | u8 *pos, qos_info; | |
401 | size_t offset = 0, noffset; | |
402 | int i, count, rates_len, supp_rates_len; | |
403 | u16 capab; | |
404 | struct ieee80211_supported_band *sband; | |
405 | u32 rates = 0; | |
406 | struct ieee80211_bss *bss = (void *)assoc_data->bss->priv; | |
407 | ||
408 | lockdep_assert_held(&ifmgd->mtx); | |
409 | ||
410 | sband = local->hw.wiphy->bands[local->oper_channel->band]; | |
411 | ||
412 | if (assoc_data->supp_rates_len) { | |
413 | /* | |
414 | * Get all rates supported by the device and the AP as | |
415 | * some APs don't like getting a superset of their rates | |
416 | * in the association request (e.g. D-Link DAP 1353 in | |
417 | * b-only mode)... | |
418 | */ | |
419 | rates_len = ieee80211_compatible_rates(assoc_data->supp_rates, | |
420 | assoc_data->supp_rates_len, | |
421 | sband, &rates); | |
422 | } else { | |
423 | /* | |
424 | * In case AP not provide any supported rates information | |
425 | * before association, we send information element(s) with | |
426 | * all rates that we support. | |
427 | */ | |
428 | rates = ~0; | |
429 | rates_len = sband->n_bitrates; | |
430 | } | |
431 | ||
432 | skb = alloc_skb(local->hw.extra_tx_headroom + | |
433 | sizeof(*mgmt) + /* bit too much but doesn't matter */ | |
434 | 2 + assoc_data->ssid_len + /* SSID */ | |
435 | 4 + rates_len + /* (extended) rates */ | |
436 | 4 + /* power capability */ | |
437 | 2 + 2 * sband->n_channels + /* supported channels */ | |
438 | 2 + sizeof(struct ieee80211_ht_cap) + /* HT */ | |
439 | assoc_data->ie_len + /* extra IEs */ | |
440 | 9, /* WMM */ | |
441 | GFP_KERNEL); | |
442 | if (!skb) | |
443 | return; | |
444 | ||
445 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
446 | ||
447 | capab = WLAN_CAPABILITY_ESS; | |
448 | ||
449 | if (sband->band == IEEE80211_BAND_2GHZ) { | |
450 | if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE)) | |
451 | capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; | |
452 | if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE)) | |
453 | capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; | |
454 | } | |
455 | ||
456 | if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY) | |
457 | capab |= WLAN_CAPABILITY_PRIVACY; | |
458 | ||
459 | if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && | |
460 | (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT)) | |
461 | capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; | |
462 | ||
463 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
464 | memset(mgmt, 0, 24); | |
465 | memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN); | |
466 | memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); | |
467 | memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN); | |
468 | ||
469 | if (!is_zero_ether_addr(assoc_data->prev_bssid)) { | |
470 | skb_put(skb, 10); | |
471 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
472 | IEEE80211_STYPE_REASSOC_REQ); | |
473 | mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab); | |
474 | mgmt->u.reassoc_req.listen_interval = | |
475 | cpu_to_le16(local->hw.conf.listen_interval); | |
476 | memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid, | |
477 | ETH_ALEN); | |
478 | } else { | |
479 | skb_put(skb, 4); | |
480 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
481 | IEEE80211_STYPE_ASSOC_REQ); | |
482 | mgmt->u.assoc_req.capab_info = cpu_to_le16(capab); | |
483 | mgmt->u.assoc_req.listen_interval = | |
484 | cpu_to_le16(local->hw.conf.listen_interval); | |
485 | } | |
486 | ||
487 | /* SSID */ | |
488 | pos = skb_put(skb, 2 + assoc_data->ssid_len); | |
489 | *pos++ = WLAN_EID_SSID; | |
490 | *pos++ = assoc_data->ssid_len; | |
491 | memcpy(pos, assoc_data->ssid, assoc_data->ssid_len); | |
492 | ||
493 | /* add all rates which were marked to be used above */ | |
494 | supp_rates_len = rates_len; | |
495 | if (supp_rates_len > 8) | |
496 | supp_rates_len = 8; | |
497 | ||
498 | pos = skb_put(skb, supp_rates_len + 2); | |
499 | *pos++ = WLAN_EID_SUPP_RATES; | |
500 | *pos++ = supp_rates_len; | |
501 | ||
502 | count = 0; | |
503 | for (i = 0; i < sband->n_bitrates; i++) { | |
504 | if (BIT(i) & rates) { | |
505 | int rate = sband->bitrates[i].bitrate; | |
506 | *pos++ = (u8) (rate / 5); | |
507 | if (++count == 8) | |
508 | break; | |
509 | } | |
510 | } | |
511 | ||
512 | if (rates_len > count) { | |
513 | pos = skb_put(skb, rates_len - count + 2); | |
514 | *pos++ = WLAN_EID_EXT_SUPP_RATES; | |
515 | *pos++ = rates_len - count; | |
516 | ||
517 | for (i++; i < sband->n_bitrates; i++) { | |
518 | if (BIT(i) & rates) { | |
519 | int rate = sband->bitrates[i].bitrate; | |
520 | *pos++ = (u8) (rate / 5); | |
521 | } | |
522 | } | |
523 | } | |
524 | ||
525 | if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) { | |
526 | /* 1. power capabilities */ | |
527 | pos = skb_put(skb, 4); | |
528 | *pos++ = WLAN_EID_PWR_CAPABILITY; | |
529 | *pos++ = 2; | |
530 | *pos++ = 0; /* min tx power */ | |
531 | *pos++ = local->oper_channel->max_power; /* max tx power */ | |
532 | ||
533 | /* 2. supported channels */ | |
534 | /* TODO: get this in reg domain format */ | |
535 | pos = skb_put(skb, 2 * sband->n_channels + 2); | |
536 | *pos++ = WLAN_EID_SUPPORTED_CHANNELS; | |
537 | *pos++ = 2 * sband->n_channels; | |
538 | for (i = 0; i < sband->n_channels; i++) { | |
539 | *pos++ = ieee80211_frequency_to_channel( | |
540 | sband->channels[i].center_freq); | |
541 | *pos++ = 1; /* one channel in the subband*/ | |
542 | } | |
543 | } | |
544 | ||
545 | /* if present, add any custom IEs that go before HT */ | |
546 | if (assoc_data->ie_len && assoc_data->ie) { | |
547 | static const u8 before_ht[] = { | |
548 | WLAN_EID_SSID, | |
549 | WLAN_EID_SUPP_RATES, | |
550 | WLAN_EID_EXT_SUPP_RATES, | |
551 | WLAN_EID_PWR_CAPABILITY, | |
552 | WLAN_EID_SUPPORTED_CHANNELS, | |
553 | WLAN_EID_RSN, | |
554 | WLAN_EID_QOS_CAPA, | |
555 | WLAN_EID_RRM_ENABLED_CAPABILITIES, | |
556 | WLAN_EID_MOBILITY_DOMAIN, | |
557 | WLAN_EID_SUPPORTED_REGULATORY_CLASSES, | |
558 | }; | |
559 | noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len, | |
560 | before_ht, ARRAY_SIZE(before_ht), | |
561 | offset); | |
562 | pos = skb_put(skb, noffset - offset); | |
563 | memcpy(pos, assoc_data->ie + offset, noffset - offset); | |
564 | offset = noffset; | |
565 | } | |
566 | ||
567 | if (!(ifmgd->flags & IEEE80211_STA_DISABLE_11N) && | |
568 | bss->wmm_used && local->hw.queues >= 4) | |
569 | ieee80211_add_ht_ie(sdata, skb, assoc_data->ht_information_ie, | |
570 | sband, local->oper_channel, ifmgd->ap_smps); | |
571 | ||
572 | /* if present, add any custom non-vendor IEs that go after HT */ | |
573 | if (assoc_data->ie_len && assoc_data->ie) { | |
574 | noffset = ieee80211_ie_split_vendor(assoc_data->ie, | |
575 | assoc_data->ie_len, | |
576 | offset); | |
577 | pos = skb_put(skb, noffset - offset); | |
578 | memcpy(pos, assoc_data->ie + offset, noffset - offset); | |
579 | offset = noffset; | |
580 | } | |
581 | ||
582 | if (assoc_data->wmm_used && local->hw.queues >= 4) { | |
583 | if (assoc_data->uapsd_used) { | |
584 | qos_info = local->uapsd_queues; | |
585 | qos_info |= (local->uapsd_max_sp_len << | |
586 | IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); | |
587 | } else { | |
588 | qos_info = 0; | |
589 | } | |
590 | ||
591 | pos = skb_put(skb, 9); | |
592 | *pos++ = WLAN_EID_VENDOR_SPECIFIC; | |
593 | *pos++ = 7; /* len */ | |
594 | *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */ | |
595 | *pos++ = 0x50; | |
596 | *pos++ = 0xf2; | |
597 | *pos++ = 2; /* WME */ | |
598 | *pos++ = 0; /* WME info */ | |
599 | *pos++ = 1; /* WME ver */ | |
600 | *pos++ = qos_info; | |
601 | } | |
602 | ||
603 | /* add any remaining custom (i.e. vendor specific here) IEs */ | |
604 | if (assoc_data->ie_len && assoc_data->ie) { | |
605 | noffset = assoc_data->ie_len; | |
606 | pos = skb_put(skb, noffset - offset); | |
607 | memcpy(pos, assoc_data->ie + offset, noffset - offset); | |
608 | } | |
609 | ||
610 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; | |
611 | ieee80211_tx_skb(sdata, skb); | |
612 | } | |
613 | ||
ef422bc0 | 614 | static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata, |
667503dd | 615 | const u8 *bssid, u16 stype, u16 reason, |
d5cdfacb | 616 | void *cookie, bool send_frame) |
9ac19a90 JB |
617 | { |
618 | struct ieee80211_local *local = sdata->local; | |
46900298 | 619 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
9ac19a90 JB |
620 | struct sk_buff *skb; |
621 | struct ieee80211_mgmt *mgmt; | |
9aed3cc1 | 622 | |
65fc73ac | 623 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt)); |
d15b8459 | 624 | if (!skb) |
9ac19a90 | 625 | return; |
d15b8459 | 626 | |
9ac19a90 JB |
627 | skb_reserve(skb, local->hw.extra_tx_headroom); |
628 | ||
629 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
630 | memset(mgmt, 0, 24); | |
77fdaa12 | 631 | memcpy(mgmt->da, bssid, ETH_ALEN); |
47846c9b | 632 | memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); |
77fdaa12 | 633 | memcpy(mgmt->bssid, bssid, ETH_ALEN); |
ef422bc0 | 634 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype); |
9ac19a90 | 635 | skb_put(skb, 2); |
ef422bc0 | 636 | /* u.deauth.reason_code == u.disassoc.reason_code */ |
9ac19a90 JB |
637 | mgmt->u.deauth.reason_code = cpu_to_le16(reason); |
638 | ||
53b46b84 | 639 | if (stype == IEEE80211_STYPE_DEAUTH) |
ce470613 HS |
640 | if (cookie) |
641 | __cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len); | |
642 | else | |
643 | cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len); | |
53b46b84 | 644 | else |
ce470613 HS |
645 | if (cookie) |
646 | __cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len); | |
647 | else | |
648 | cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len); | |
62ae67be JB |
649 | if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED)) |
650 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; | |
d5cdfacb JM |
651 | |
652 | if (send_frame) | |
653 | ieee80211_tx_skb(sdata, skb); | |
654 | else | |
655 | kfree_skb(skb); | |
9ac19a90 JB |
656 | } |
657 | ||
572e0012 KV |
658 | void ieee80211_send_pspoll(struct ieee80211_local *local, |
659 | struct ieee80211_sub_if_data *sdata) | |
660 | { | |
572e0012 KV |
661 | struct ieee80211_pspoll *pspoll; |
662 | struct sk_buff *skb; | |
572e0012 | 663 | |
d8cd189e KV |
664 | skb = ieee80211_pspoll_get(&local->hw, &sdata->vif); |
665 | if (!skb) | |
572e0012 | 666 | return; |
572e0012 | 667 | |
d8cd189e KV |
668 | pspoll = (struct ieee80211_pspoll *) skb->data; |
669 | pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); | |
572e0012 | 670 | |
62ae67be JB |
671 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
672 | ieee80211_tx_skb(sdata, skb); | |
572e0012 KV |
673 | } |
674 | ||
965bedad JB |
675 | void ieee80211_send_nullfunc(struct ieee80211_local *local, |
676 | struct ieee80211_sub_if_data *sdata, | |
677 | int powersave) | |
678 | { | |
679 | struct sk_buff *skb; | |
d8cd189e | 680 | struct ieee80211_hdr_3addr *nullfunc; |
b6f35301 | 681 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
965bedad | 682 | |
d8cd189e KV |
683 | skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif); |
684 | if (!skb) | |
965bedad | 685 | return; |
965bedad | 686 | |
d8cd189e | 687 | nullfunc = (struct ieee80211_hdr_3addr *) skb->data; |
965bedad | 688 | if (powersave) |
d8cd189e | 689 | nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); |
965bedad | 690 | |
62ae67be | 691 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
b6f35301 RM |
692 | if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL | |
693 | IEEE80211_STA_CONNECTION_POLL)) | |
694 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; | |
695 | ||
62ae67be | 696 | ieee80211_tx_skb(sdata, skb); |
965bedad JB |
697 | } |
698 | ||
d524215f FF |
699 | static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local, |
700 | struct ieee80211_sub_if_data *sdata) | |
701 | { | |
702 | struct sk_buff *skb; | |
703 | struct ieee80211_hdr *nullfunc; | |
704 | __le16 fc; | |
705 | ||
706 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) | |
707 | return; | |
708 | ||
709 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30); | |
d15b8459 | 710 | if (!skb) |
d524215f | 711 | return; |
d15b8459 | 712 | |
d524215f FF |
713 | skb_reserve(skb, local->hw.extra_tx_headroom); |
714 | ||
715 | nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30); | |
716 | memset(nullfunc, 0, 30); | |
717 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | | |
718 | IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); | |
719 | nullfunc->frame_control = fc; | |
720 | memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN); | |
721 | memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); | |
722 | memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN); | |
723 | memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN); | |
724 | ||
725 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; | |
726 | ieee80211_tx_skb(sdata, skb); | |
727 | } | |
728 | ||
cc32abd4 JB |
729 | /* spectrum management related things */ |
730 | static void ieee80211_chswitch_work(struct work_struct *work) | |
731 | { | |
732 | struct ieee80211_sub_if_data *sdata = | |
733 | container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work); | |
cc32abd4 JB |
734 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
735 | ||
9607e6b6 | 736 | if (!ieee80211_sdata_running(sdata)) |
cc32abd4 JB |
737 | return; |
738 | ||
77fdaa12 JB |
739 | mutex_lock(&ifmgd->mtx); |
740 | if (!ifmgd->associated) | |
741 | goto out; | |
cc32abd4 JB |
742 | |
743 | sdata->local->oper_channel = sdata->local->csa_channel; | |
5ce6e438 JB |
744 | if (!sdata->local->ops->channel_switch) { |
745 | /* call "hw_config" only if doing sw channel switch */ | |
746 | ieee80211_hw_config(sdata->local, | |
747 | IEEE80211_CONF_CHANGE_CHANNEL); | |
1ea57b1f SL |
748 | } else { |
749 | /* update the device channel directly */ | |
750 | sdata->local->hw.conf.channel = sdata->local->oper_channel; | |
5ce6e438 | 751 | } |
77fdaa12 | 752 | |
cc32abd4 | 753 | /* XXX: shouldn't really modify cfg80211-owned data! */ |
0c1ad2ca | 754 | ifmgd->associated->channel = sdata->local->oper_channel; |
cc32abd4 | 755 | |
cc32abd4 JB |
756 | ieee80211_wake_queues_by_reason(&sdata->local->hw, |
757 | IEEE80211_QUEUE_STOP_REASON_CSA); | |
77fdaa12 JB |
758 | out: |
759 | ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED; | |
760 | mutex_unlock(&ifmgd->mtx); | |
cc32abd4 JB |
761 | } |
762 | ||
5ce6e438 JB |
763 | void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success) |
764 | { | |
765 | struct ieee80211_sub_if_data *sdata; | |
766 | struct ieee80211_if_managed *ifmgd; | |
767 | ||
768 | sdata = vif_to_sdata(vif); | |
769 | ifmgd = &sdata->u.mgd; | |
770 | ||
771 | trace_api_chswitch_done(sdata, success); | |
772 | if (!success) { | |
773 | /* | |
774 | * If the channel switch was not successful, stay | |
775 | * around on the old channel. We currently lack | |
776 | * good handling of this situation, possibly we | |
777 | * should just drop the association. | |
778 | */ | |
779 | sdata->local->csa_channel = sdata->local->oper_channel; | |
780 | } | |
781 | ||
782 | ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work); | |
783 | } | |
784 | EXPORT_SYMBOL(ieee80211_chswitch_done); | |
785 | ||
cc32abd4 JB |
786 | static void ieee80211_chswitch_timer(unsigned long data) |
787 | { | |
788 | struct ieee80211_sub_if_data *sdata = | |
789 | (struct ieee80211_sub_if_data *) data; | |
790 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
791 | ||
5bb644a0 JB |
792 | if (sdata->local->quiescing) { |
793 | set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running); | |
794 | return; | |
795 | } | |
796 | ||
42935eca | 797 | ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work); |
cc32abd4 JB |
798 | } |
799 | ||
800 | void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata, | |
801 | struct ieee80211_channel_sw_ie *sw_elem, | |
5ce6e438 JB |
802 | struct ieee80211_bss *bss, |
803 | u64 timestamp) | |
cc32abd4 | 804 | { |
0c1ad2ca JB |
805 | struct cfg80211_bss *cbss = |
806 | container_of((void *)bss, struct cfg80211_bss, priv); | |
cc32abd4 JB |
807 | struct ieee80211_channel *new_ch; |
808 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
59eb21a6 BR |
809 | int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num, |
810 | cbss->channel->band); | |
cc32abd4 | 811 | |
77fdaa12 JB |
812 | ASSERT_MGD_MTX(ifmgd); |
813 | ||
814 | if (!ifmgd->associated) | |
cc32abd4 JB |
815 | return; |
816 | ||
fbe9c429 | 817 | if (sdata->local->scanning) |
cc32abd4 JB |
818 | return; |
819 | ||
820 | /* Disregard subsequent beacons if we are already running a timer | |
821 | processing a CSA */ | |
822 | ||
823 | if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED) | |
824 | return; | |
825 | ||
826 | new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq); | |
827 | if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED) | |
828 | return; | |
829 | ||
830 | sdata->local->csa_channel = new_ch; | |
831 | ||
5ce6e438 JB |
832 | if (sdata->local->ops->channel_switch) { |
833 | /* use driver's channel switch callback */ | |
834 | struct ieee80211_channel_switch ch_switch; | |
835 | memset(&ch_switch, 0, sizeof(ch_switch)); | |
836 | ch_switch.timestamp = timestamp; | |
837 | if (sw_elem->mode) { | |
838 | ch_switch.block_tx = true; | |
839 | ieee80211_stop_queues_by_reason(&sdata->local->hw, | |
840 | IEEE80211_QUEUE_STOP_REASON_CSA); | |
841 | } | |
842 | ch_switch.channel = new_ch; | |
843 | ch_switch.count = sw_elem->count; | |
844 | ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED; | |
845 | drv_channel_switch(sdata->local, &ch_switch); | |
846 | return; | |
847 | } | |
848 | ||
849 | /* channel switch handled in software */ | |
cc32abd4 | 850 | if (sw_elem->count <= 1) { |
42935eca | 851 | ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work); |
cc32abd4 | 852 | } else { |
9feaddc7 WYG |
853 | if (sw_elem->mode) |
854 | ieee80211_stop_queues_by_reason(&sdata->local->hw, | |
cc32abd4 JB |
855 | IEEE80211_QUEUE_STOP_REASON_CSA); |
856 | ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED; | |
857 | mod_timer(&ifmgd->chswitch_timer, | |
858 | jiffies + | |
859 | msecs_to_jiffies(sw_elem->count * | |
0c1ad2ca | 860 | cbss->beacon_interval)); |
cc32abd4 JB |
861 | } |
862 | } | |
863 | ||
864 | static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata, | |
865 | u16 capab_info, u8 *pwr_constr_elem, | |
866 | u8 pwr_constr_elem_len) | |
867 | { | |
868 | struct ieee80211_conf *conf = &sdata->local->hw.conf; | |
869 | ||
870 | if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT)) | |
871 | return; | |
872 | ||
873 | /* Power constraint IE length should be 1 octet */ | |
874 | if (pwr_constr_elem_len != 1) | |
875 | return; | |
876 | ||
a48b13ac | 877 | if ((*pwr_constr_elem <= conf->channel->max_reg_power) && |
cc32abd4 JB |
878 | (*pwr_constr_elem != sdata->local->power_constr_level)) { |
879 | sdata->local->power_constr_level = *pwr_constr_elem; | |
880 | ieee80211_hw_config(sdata->local, 0); | |
881 | } | |
882 | } | |
883 | ||
f90754c1 JO |
884 | void ieee80211_enable_dyn_ps(struct ieee80211_vif *vif) |
885 | { | |
886 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
887 | struct ieee80211_local *local = sdata->local; | |
888 | struct ieee80211_conf *conf = &local->hw.conf; | |
889 | ||
890 | WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION || | |
891 | !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) || | |
892 | (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)); | |
893 | ||
894 | local->disable_dynamic_ps = false; | |
895 | conf->dynamic_ps_timeout = local->dynamic_ps_user_timeout; | |
896 | } | |
897 | EXPORT_SYMBOL(ieee80211_enable_dyn_ps); | |
898 | ||
899 | void ieee80211_disable_dyn_ps(struct ieee80211_vif *vif) | |
900 | { | |
901 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
902 | struct ieee80211_local *local = sdata->local; | |
903 | struct ieee80211_conf *conf = &local->hw.conf; | |
904 | ||
905 | WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION || | |
906 | !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) || | |
907 | (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)); | |
908 | ||
909 | local->disable_dynamic_ps = true; | |
910 | conf->dynamic_ps_timeout = 0; | |
911 | del_timer_sync(&local->dynamic_ps_timer); | |
912 | ieee80211_queue_work(&local->hw, | |
913 | &local->dynamic_ps_enable_work); | |
914 | } | |
915 | EXPORT_SYMBOL(ieee80211_disable_dyn_ps); | |
916 | ||
965bedad JB |
917 | /* powersave */ |
918 | static void ieee80211_enable_ps(struct ieee80211_local *local, | |
919 | struct ieee80211_sub_if_data *sdata) | |
920 | { | |
921 | struct ieee80211_conf *conf = &local->hw.conf; | |
922 | ||
d5edaedc JB |
923 | /* |
924 | * If we are scanning right now then the parameters will | |
925 | * take effect when scan finishes. | |
926 | */ | |
fbe9c429 | 927 | if (local->scanning) |
d5edaedc JB |
928 | return; |
929 | ||
965bedad JB |
930 | if (conf->dynamic_ps_timeout > 0 && |
931 | !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) { | |
932 | mod_timer(&local->dynamic_ps_timer, jiffies + | |
933 | msecs_to_jiffies(conf->dynamic_ps_timeout)); | |
934 | } else { | |
935 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) | |
936 | ieee80211_send_nullfunc(local, sdata, 1); | |
375177bf | 937 | |
2a13052f JO |
938 | if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) && |
939 | (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) | |
940 | return; | |
941 | ||
942 | conf->flags |= IEEE80211_CONF_PS; | |
943 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); | |
965bedad JB |
944 | } |
945 | } | |
946 | ||
947 | static void ieee80211_change_ps(struct ieee80211_local *local) | |
948 | { | |
949 | struct ieee80211_conf *conf = &local->hw.conf; | |
950 | ||
951 | if (local->ps_sdata) { | |
965bedad JB |
952 | ieee80211_enable_ps(local, local->ps_sdata); |
953 | } else if (conf->flags & IEEE80211_CONF_PS) { | |
954 | conf->flags &= ~IEEE80211_CONF_PS; | |
955 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); | |
956 | del_timer_sync(&local->dynamic_ps_timer); | |
957 | cancel_work_sync(&local->dynamic_ps_enable_work); | |
958 | } | |
959 | } | |
960 | ||
808118cb JY |
961 | static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata) |
962 | { | |
963 | struct ieee80211_if_managed *mgd = &sdata->u.mgd; | |
964 | struct sta_info *sta = NULL; | |
c2c98fde | 965 | bool authorized = false; |
808118cb JY |
966 | |
967 | if (!mgd->powersave) | |
968 | return false; | |
969 | ||
05cb9108 JB |
970 | if (mgd->broken_ap) |
971 | return false; | |
972 | ||
808118cb JY |
973 | if (!mgd->associated) |
974 | return false; | |
975 | ||
976 | if (!mgd->associated->beacon_ies) | |
977 | return false; | |
978 | ||
979 | if (mgd->flags & (IEEE80211_STA_BEACON_POLL | | |
980 | IEEE80211_STA_CONNECTION_POLL)) | |
981 | return false; | |
982 | ||
983 | rcu_read_lock(); | |
984 | sta = sta_info_get(sdata, mgd->bssid); | |
985 | if (sta) | |
c2c98fde | 986 | authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); |
808118cb JY |
987 | rcu_read_unlock(); |
988 | ||
c2c98fde | 989 | return authorized; |
808118cb JY |
990 | } |
991 | ||
965bedad | 992 | /* need to hold RTNL or interface lock */ |
10f644a4 | 993 | void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency) |
965bedad JB |
994 | { |
995 | struct ieee80211_sub_if_data *sdata, *found = NULL; | |
996 | int count = 0; | |
195e294d | 997 | int timeout; |
965bedad JB |
998 | |
999 | if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) { | |
1000 | local->ps_sdata = NULL; | |
1001 | return; | |
1002 | } | |
1003 | ||
af6b6374 JB |
1004 | if (!list_empty(&local->work_list)) { |
1005 | local->ps_sdata = NULL; | |
1006 | goto change; | |
1007 | } | |
1008 | ||
965bedad | 1009 | list_for_each_entry(sdata, &local->interfaces, list) { |
9607e6b6 | 1010 | if (!ieee80211_sdata_running(sdata)) |
965bedad | 1011 | continue; |
8c7914de RM |
1012 | if (sdata->vif.type == NL80211_IFTYPE_AP) { |
1013 | /* If an AP vif is found, then disable PS | |
1014 | * by setting the count to zero thereby setting | |
1015 | * ps_sdata to NULL. | |
1016 | */ | |
1017 | count = 0; | |
1018 | break; | |
1019 | } | |
965bedad JB |
1020 | if (sdata->vif.type != NL80211_IFTYPE_STATION) |
1021 | continue; | |
1022 | found = sdata; | |
1023 | count++; | |
1024 | } | |
1025 | ||
808118cb | 1026 | if (count == 1 && ieee80211_powersave_allowed(found)) { |
f90754c1 | 1027 | struct ieee80211_conf *conf = &local->hw.conf; |
10f644a4 JB |
1028 | s32 beaconint_us; |
1029 | ||
1030 | if (latency < 0) | |
ed77134b | 1031 | latency = pm_qos_request(PM_QOS_NETWORK_LATENCY); |
10f644a4 JB |
1032 | |
1033 | beaconint_us = ieee80211_tu_to_usec( | |
1034 | found->vif.bss_conf.beacon_int); | |
1035 | ||
ff616381 | 1036 | timeout = local->dynamic_ps_forced_timeout; |
195e294d JO |
1037 | if (timeout < 0) { |
1038 | /* | |
ff616381 JO |
1039 | * Go to full PSM if the user configures a very low |
1040 | * latency requirement. | |
0ab82b04 EP |
1041 | * The 2000 second value is there for compatibility |
1042 | * until the PM_QOS_NETWORK_LATENCY is configured | |
1043 | * with real values. | |
195e294d | 1044 | */ |
0ab82b04 EP |
1045 | if (latency > (1900 * USEC_PER_MSEC) && |
1046 | latency != (2000 * USEC_PER_SEC)) | |
195e294d | 1047 | timeout = 0; |
ff616381 JO |
1048 | else |
1049 | timeout = 100; | |
195e294d | 1050 | } |
f90754c1 JO |
1051 | local->dynamic_ps_user_timeout = timeout; |
1052 | if (!local->disable_dynamic_ps) | |
1053 | conf->dynamic_ps_timeout = | |
1054 | local->dynamic_ps_user_timeout; | |
195e294d | 1055 | |
04fe2037 | 1056 | if (beaconint_us > latency) { |
10f644a4 | 1057 | local->ps_sdata = NULL; |
04fe2037 | 1058 | } else { |
56007a02 | 1059 | struct ieee80211_bss *bss; |
04fe2037 | 1060 | int maxslp = 1; |
56007a02 | 1061 | u8 dtimper; |
04fe2037 | 1062 | |
56007a02 JB |
1063 | bss = (void *)found->u.mgd.associated->priv; |
1064 | dtimper = bss->dtim_period; | |
1065 | ||
1066 | /* If the TIM IE is invalid, pretend the value is 1 */ | |
1067 | if (!dtimper) | |
1068 | dtimper = 1; | |
1069 | else if (dtimper > 1) | |
04fe2037 JB |
1070 | maxslp = min_t(int, dtimper, |
1071 | latency / beaconint_us); | |
1072 | ||
9ccebe61 | 1073 | local->hw.conf.max_sleep_period = maxslp; |
56007a02 | 1074 | local->hw.conf.ps_dtim_period = dtimper; |
10f644a4 | 1075 | local->ps_sdata = found; |
04fe2037 | 1076 | } |
10f644a4 | 1077 | } else { |
965bedad | 1078 | local->ps_sdata = NULL; |
10f644a4 | 1079 | } |
965bedad | 1080 | |
af6b6374 | 1081 | change: |
965bedad JB |
1082 | ieee80211_change_ps(local); |
1083 | } | |
1084 | ||
1085 | void ieee80211_dynamic_ps_disable_work(struct work_struct *work) | |
1086 | { | |
1087 | struct ieee80211_local *local = | |
1088 | container_of(work, struct ieee80211_local, | |
1089 | dynamic_ps_disable_work); | |
1090 | ||
1091 | if (local->hw.conf.flags & IEEE80211_CONF_PS) { | |
1092 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; | |
1093 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); | |
1094 | } | |
1095 | ||
1096 | ieee80211_wake_queues_by_reason(&local->hw, | |
1097 | IEEE80211_QUEUE_STOP_REASON_PS); | |
1098 | } | |
1099 | ||
1100 | void ieee80211_dynamic_ps_enable_work(struct work_struct *work) | |
1101 | { | |
1102 | struct ieee80211_local *local = | |
1103 | container_of(work, struct ieee80211_local, | |
1104 | dynamic_ps_enable_work); | |
1105 | struct ieee80211_sub_if_data *sdata = local->ps_sdata; | |
5e34069c | 1106 | struct ieee80211_if_managed *ifmgd; |
1ddc2867 RM |
1107 | unsigned long flags; |
1108 | int q; | |
965bedad JB |
1109 | |
1110 | /* can only happen when PS was just disabled anyway */ | |
1111 | if (!sdata) | |
1112 | return; | |
1113 | ||
5e34069c CL |
1114 | ifmgd = &sdata->u.mgd; |
1115 | ||
965bedad JB |
1116 | if (local->hw.conf.flags & IEEE80211_CONF_PS) |
1117 | return; | |
1118 | ||
77b7023a AN |
1119 | if (!local->disable_dynamic_ps && |
1120 | local->hw.conf.dynamic_ps_timeout > 0) { | |
1121 | /* don't enter PS if TX frames are pending */ | |
1122 | if (drv_tx_frames_pending(local)) { | |
1ddc2867 RM |
1123 | mod_timer(&local->dynamic_ps_timer, jiffies + |
1124 | msecs_to_jiffies( | |
1125 | local->hw.conf.dynamic_ps_timeout)); | |
1126 | return; | |
1127 | } | |
77b7023a AN |
1128 | |
1129 | /* | |
1130 | * transmission can be stopped by others which leads to | |
1131 | * dynamic_ps_timer expiry. Postpone the ps timer if it | |
1132 | * is not the actual idle state. | |
1133 | */ | |
1134 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); | |
1135 | for (q = 0; q < local->hw.queues; q++) { | |
1136 | if (local->queue_stop_reasons[q]) { | |
1137 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, | |
1138 | flags); | |
1139 | mod_timer(&local->dynamic_ps_timer, jiffies + | |
1140 | msecs_to_jiffies( | |
1141 | local->hw.conf.dynamic_ps_timeout)); | |
1142 | return; | |
1143 | } | |
1144 | } | |
1145 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); | |
1ddc2867 | 1146 | } |
1ddc2867 | 1147 | |
375177bf | 1148 | if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) && |
9c38a8b4 | 1149 | !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { |
f3e85b9e | 1150 | netif_tx_stop_all_queues(sdata->dev); |
965bedad | 1151 | |
e8306f98 VN |
1152 | if (drv_tx_frames_pending(local)) |
1153 | mod_timer(&local->dynamic_ps_timer, jiffies + | |
1154 | msecs_to_jiffies( | |
1155 | local->hw.conf.dynamic_ps_timeout)); | |
1156 | else { | |
1157 | ieee80211_send_nullfunc(local, sdata, 1); | |
1158 | /* Flush to get the tx status of nullfunc frame */ | |
1159 | drv_flush(local, false); | |
1160 | } | |
f3e85b9e VN |
1161 | } |
1162 | ||
2a13052f JO |
1163 | if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) && |
1164 | (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) || | |
375177bf VN |
1165 | (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { |
1166 | ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; | |
1167 | local->hw.conf.flags |= IEEE80211_CONF_PS; | |
1168 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); | |
1169 | } | |
f3e85b9e | 1170 | |
77b7023a AN |
1171 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) |
1172 | netif_tx_wake_all_queues(sdata->dev); | |
965bedad JB |
1173 | } |
1174 | ||
1175 | void ieee80211_dynamic_ps_timer(unsigned long data) | |
1176 | { | |
1177 | struct ieee80211_local *local = (void *) data; | |
1178 | ||
78f1a8b7 | 1179 | if (local->quiescing || local->suspended) |
5bb644a0 JB |
1180 | return; |
1181 | ||
42935eca | 1182 | ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work); |
965bedad JB |
1183 | } |
1184 | ||
60f8b39c | 1185 | /* MLME */ |
f698d856 | 1186 | static void ieee80211_sta_wmm_params(struct ieee80211_local *local, |
4ced3f74 | 1187 | struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1188 | u8 *wmm_param, size_t wmm_param_len) |
1189 | { | |
f0706e82 | 1190 | struct ieee80211_tx_queue_params params; |
4ced3f74 | 1191 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f0706e82 JB |
1192 | size_t left; |
1193 | int count; | |
ab13315a | 1194 | u8 *pos, uapsd_queues = 0; |
f0706e82 | 1195 | |
e1b3ec1a SG |
1196 | if (!local->ops->conf_tx) |
1197 | return; | |
1198 | ||
af6b6374 | 1199 | if (local->hw.queues < 4) |
3434fbd3 JB |
1200 | return; |
1201 | ||
1202 | if (!wmm_param) | |
1203 | return; | |
1204 | ||
f0706e82 JB |
1205 | if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) |
1206 | return; | |
ab13315a KV |
1207 | |
1208 | if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) | |
50ae0cf1 | 1209 | uapsd_queues = local->uapsd_queues; |
ab13315a | 1210 | |
f0706e82 | 1211 | count = wmm_param[6] & 0x0f; |
46900298 | 1212 | if (count == ifmgd->wmm_last_param_set) |
f0706e82 | 1213 | return; |
46900298 | 1214 | ifmgd->wmm_last_param_set = count; |
f0706e82 JB |
1215 | |
1216 | pos = wmm_param + 8; | |
1217 | left = wmm_param_len - 8; | |
1218 | ||
1219 | memset(¶ms, 0, sizeof(params)); | |
1220 | ||
f0706e82 JB |
1221 | local->wmm_acm = 0; |
1222 | for (; left >= 4; left -= 4, pos += 4) { | |
1223 | int aci = (pos[0] >> 5) & 0x03; | |
1224 | int acm = (pos[0] >> 4) & 0x01; | |
ab13315a | 1225 | bool uapsd = false; |
f0706e82 JB |
1226 | int queue; |
1227 | ||
1228 | switch (aci) { | |
0eeb59fe | 1229 | case 1: /* AC_BK */ |
e100bb64 | 1230 | queue = 3; |
988c0f72 | 1231 | if (acm) |
0eeb59fe | 1232 | local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ |
ab13315a KV |
1233 | if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) |
1234 | uapsd = true; | |
f0706e82 | 1235 | break; |
0eeb59fe | 1236 | case 2: /* AC_VI */ |
e100bb64 | 1237 | queue = 1; |
988c0f72 | 1238 | if (acm) |
0eeb59fe | 1239 | local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ |
ab13315a KV |
1240 | if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) |
1241 | uapsd = true; | |
f0706e82 | 1242 | break; |
0eeb59fe | 1243 | case 3: /* AC_VO */ |
e100bb64 | 1244 | queue = 0; |
988c0f72 | 1245 | if (acm) |
0eeb59fe | 1246 | local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ |
ab13315a KV |
1247 | if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) |
1248 | uapsd = true; | |
f0706e82 | 1249 | break; |
0eeb59fe | 1250 | case 0: /* AC_BE */ |
f0706e82 | 1251 | default: |
e100bb64 | 1252 | queue = 2; |
988c0f72 | 1253 | if (acm) |
0eeb59fe | 1254 | local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ |
ab13315a KV |
1255 | if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) |
1256 | uapsd = true; | |
f0706e82 JB |
1257 | break; |
1258 | } | |
1259 | ||
1260 | params.aifs = pos[0] & 0x0f; | |
1261 | params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4); | |
1262 | params.cw_min = ecw2cw(pos[1] & 0x0f); | |
f434b2d1 | 1263 | params.txop = get_unaligned_le16(pos + 2); |
ab13315a KV |
1264 | params.uapsd = uapsd; |
1265 | ||
f4ea83dd | 1266 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
0fb9a9ec JP |
1267 | wiphy_debug(local->hw.wiphy, |
1268 | "WMM queue=%d aci=%d acm=%d aifs=%d " | |
1269 | "cWmin=%d cWmax=%d txop=%d uapsd=%d\n", | |
1270 | queue, aci, acm, | |
1271 | params.aifs, params.cw_min, params.cw_max, | |
1272 | params.txop, params.uapsd); | |
3330d7be | 1273 | #endif |
f6f3def3 EP |
1274 | sdata->tx_conf[queue] = params; |
1275 | if (drv_conf_tx(local, sdata, queue, ¶ms)) | |
0fb9a9ec JP |
1276 | wiphy_debug(local->hw.wiphy, |
1277 | "failed to set TX queue parameters for queue %d\n", | |
1278 | queue); | |
f0706e82 | 1279 | } |
e1b3ec1a SG |
1280 | |
1281 | /* enable WMM or activate new settings */ | |
4ced3f74 JB |
1282 | sdata->vif.bss_conf.qos = true; |
1283 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS); | |
f0706e82 JB |
1284 | } |
1285 | ||
7a5158ef JB |
1286 | static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata, |
1287 | u16 capab, bool erp_valid, u8 erp) | |
5628221c | 1288 | { |
bda3933a | 1289 | struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; |
471b3efd | 1290 | u32 changed = 0; |
7a5158ef JB |
1291 | bool use_protection; |
1292 | bool use_short_preamble; | |
1293 | bool use_short_slot; | |
1294 | ||
1295 | if (erp_valid) { | |
1296 | use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; | |
1297 | use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; | |
1298 | } else { | |
1299 | use_protection = false; | |
1300 | use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); | |
1301 | } | |
1302 | ||
1303 | use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); | |
43d35343 FF |
1304 | if (sdata->local->hw.conf.channel->band == IEEE80211_BAND_5GHZ) |
1305 | use_short_slot = true; | |
5628221c | 1306 | |
471b3efd | 1307 | if (use_protection != bss_conf->use_cts_prot) { |
471b3efd JB |
1308 | bss_conf->use_cts_prot = use_protection; |
1309 | changed |= BSS_CHANGED_ERP_CTS_PROT; | |
5628221c | 1310 | } |
7e9ed188 | 1311 | |
d43c7b37 | 1312 | if (use_short_preamble != bss_conf->use_short_preamble) { |
d43c7b37 | 1313 | bss_conf->use_short_preamble = use_short_preamble; |
471b3efd | 1314 | changed |= BSS_CHANGED_ERP_PREAMBLE; |
7e9ed188 | 1315 | } |
d9430a32 | 1316 | |
7a5158ef | 1317 | if (use_short_slot != bss_conf->use_short_slot) { |
7a5158ef JB |
1318 | bss_conf->use_short_slot = use_short_slot; |
1319 | changed |= BSS_CHANGED_ERP_SLOT; | |
50c4afb9 JL |
1320 | } |
1321 | ||
1322 | return changed; | |
1323 | } | |
1324 | ||
f698d856 | 1325 | static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, |
0c1ad2ca | 1326 | struct cfg80211_bss *cbss, |
ae5eb026 | 1327 | u32 bss_info_changed) |
f0706e82 | 1328 | { |
0c1ad2ca | 1329 | struct ieee80211_bss *bss = (void *)cbss->priv; |
471b3efd | 1330 | struct ieee80211_local *local = sdata->local; |
68542962 | 1331 | struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; |
d6f2da5b | 1332 | |
ae5eb026 | 1333 | bss_info_changed |= BSS_CHANGED_ASSOC; |
77fdaa12 | 1334 | /* set timing information */ |
68542962 JO |
1335 | bss_conf->beacon_int = cbss->beacon_interval; |
1336 | bss_conf->timestamp = cbss->tsf; | |
5628221c | 1337 | |
77fdaa12 JB |
1338 | bss_info_changed |= BSS_CHANGED_BEACON_INT; |
1339 | bss_info_changed |= ieee80211_handle_bss_capability(sdata, | |
0c1ad2ca | 1340 | cbss->capability, bss->has_erp_value, bss->erp_value); |
21c0cbe7 | 1341 | |
7ccc8bd7 FF |
1342 | sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec( |
1343 | IEEE80211_BEACON_LOSS_COUNT * bss_conf->beacon_int)); | |
1344 | ||
0c1ad2ca JB |
1345 | sdata->u.mgd.associated = cbss; |
1346 | memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN); | |
f0706e82 | 1347 | |
17e4ec14 JM |
1348 | sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE; |
1349 | ||
b291ba11 JB |
1350 | /* just to be sure */ |
1351 | sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL | | |
1352 | IEEE80211_STA_BEACON_POLL); | |
1353 | ||
9ac19a90 | 1354 | ieee80211_led_assoc(local, 1); |
9306102e | 1355 | |
e5b900d2 JB |
1356 | if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD) |
1357 | bss_conf->dtim_period = bss->dtim_period; | |
1358 | else | |
1359 | bss_conf->dtim_period = 0; | |
1360 | ||
68542962 | 1361 | bss_conf->assoc = 1; |
96dd22ac JB |
1362 | /* |
1363 | * For now just always ask the driver to update the basic rateset | |
1364 | * when we have associated, we aren't checking whether it actually | |
1365 | * changed or not. | |
1366 | */ | |
ae5eb026 | 1367 | bss_info_changed |= BSS_CHANGED_BASIC_RATES; |
9cef8737 JB |
1368 | |
1369 | /* And the BSSID changed - we're associated now */ | |
1370 | bss_info_changed |= BSS_CHANGED_BSSID; | |
1371 | ||
a97c13c3 | 1372 | /* Tell the driver to monitor connection quality (if supported) */ |
ea086359 | 1373 | if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI && |
68542962 | 1374 | bss_conf->cqm_rssi_thold) |
a97c13c3 JO |
1375 | bss_info_changed |= BSS_CHANGED_CQM; |
1376 | ||
68542962 JO |
1377 | /* Enable ARP filtering */ |
1378 | if (bss_conf->arp_filter_enabled != sdata->arp_filter_state) { | |
1379 | bss_conf->arp_filter_enabled = sdata->arp_filter_state; | |
1380 | bss_info_changed |= BSS_CHANGED_ARP_FILTER; | |
1381 | } | |
1382 | ||
ae5eb026 | 1383 | ieee80211_bss_info_change_notify(sdata, bss_info_changed); |
f0706e82 | 1384 | |
056508dc JB |
1385 | mutex_lock(&local->iflist_mtx); |
1386 | ieee80211_recalc_ps(local, -1); | |
025e6be2 | 1387 | ieee80211_recalc_smps(local); |
056508dc | 1388 | mutex_unlock(&local->iflist_mtx); |
e0cb686f | 1389 | |
8a5b33f5 | 1390 | netif_tx_start_all_queues(sdata->dev); |
9ac19a90 | 1391 | netif_carrier_on(sdata->dev); |
f0706e82 JB |
1392 | } |
1393 | ||
e69e95db | 1394 | static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, |
53f73c09 | 1395 | bool remove_sta, bool tx) |
aa458d17 | 1396 | { |
46900298 | 1397 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
aa458d17 TW |
1398 | struct ieee80211_local *local = sdata->local; |
1399 | struct sta_info *sta; | |
e0cb686f | 1400 | u32 changed = 0, config_changed = 0; |
b291ba11 | 1401 | u8 bssid[ETH_ALEN]; |
aa458d17 | 1402 | |
77fdaa12 JB |
1403 | ASSERT_MGD_MTX(ifmgd); |
1404 | ||
b291ba11 JB |
1405 | if (WARN_ON(!ifmgd->associated)) |
1406 | return; | |
1407 | ||
0c1ad2ca | 1408 | memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); |
b291ba11 | 1409 | |
77fdaa12 JB |
1410 | ifmgd->associated = NULL; |
1411 | memset(ifmgd->bssid, 0, ETH_ALEN); | |
1412 | ||
1413 | /* | |
1414 | * we need to commit the associated = NULL change because the | |
1415 | * scan code uses that to determine whether this iface should | |
1416 | * go to/wake up from powersave or not -- and could otherwise | |
1417 | * wake the queues erroneously. | |
1418 | */ | |
1419 | smp_mb(); | |
1420 | ||
1421 | /* | |
1422 | * Thus, we can only afterwards stop the queues -- to account | |
1423 | * for the case where another CPU is finishing a scan at this | |
1424 | * time -- we don't want the scan code to enable queues. | |
1425 | */ | |
aa458d17 | 1426 | |
8a5b33f5 | 1427 | netif_tx_stop_all_queues(sdata->dev); |
aa458d17 TW |
1428 | netif_carrier_off(sdata->dev); |
1429 | ||
2a419056 | 1430 | mutex_lock(&local->sta_mtx); |
abe60632 | 1431 | sta = sta_info_get(sdata, bssid); |
4cad6c7c | 1432 | if (sta) { |
c2c98fde | 1433 | set_sta_flag(sta, WLAN_STA_BLOCK_BA); |
53f73c09 | 1434 | ieee80211_sta_tear_down_BA_sessions(sta, tx); |
4cad6c7c | 1435 | } |
2a419056 | 1436 | mutex_unlock(&local->sta_mtx); |
aa458d17 | 1437 | |
f5e5bf25 TW |
1438 | changed |= ieee80211_reset_erp_info(sdata); |
1439 | ||
f5e5bf25 | 1440 | ieee80211_led_assoc(local, 0); |
ae5eb026 JB |
1441 | changed |= BSS_CHANGED_ASSOC; |
1442 | sdata->vif.bss_conf.assoc = false; | |
f5e5bf25 | 1443 | |
aa837e1d JB |
1444 | ieee80211_set_wmm_default(sdata); |
1445 | ||
4797938c | 1446 | /* channel(_type) changes are handled by ieee80211_hw_config */ |
0aaffa9b | 1447 | WARN_ON(!ieee80211_set_channel_type(local, sdata, NL80211_CHAN_NO_HT)); |
e0cb686f | 1448 | |
413ad50a JB |
1449 | /* on the next assoc, re-program HT parameters */ |
1450 | sdata->ht_opmode_valid = false; | |
ef96a842 BG |
1451 | memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa)); |
1452 | memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask)); | |
413ad50a | 1453 | |
a8302de9 VT |
1454 | local->power_constr_level = 0; |
1455 | ||
520eb820 KV |
1456 | del_timer_sync(&local->dynamic_ps_timer); |
1457 | cancel_work_sync(&local->dynamic_ps_enable_work); | |
1458 | ||
e0cb686f KV |
1459 | if (local->hw.conf.flags & IEEE80211_CONF_PS) { |
1460 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; | |
1461 | config_changed |= IEEE80211_CONF_CHANGE_PS; | |
1462 | } | |
a331400b | 1463 | local->ps_sdata = NULL; |
ae5eb026 | 1464 | |
e0cb686f | 1465 | ieee80211_hw_config(local, config_changed); |
9cef8737 | 1466 | |
68542962 JO |
1467 | /* Disable ARP filtering */ |
1468 | if (sdata->vif.bss_conf.arp_filter_enabled) { | |
1469 | sdata->vif.bss_conf.arp_filter_enabled = false; | |
1470 | changed |= BSS_CHANGED_ARP_FILTER; | |
1471 | } | |
1472 | ||
0aaffa9b JB |
1473 | /* The BSSID (not really interesting) and HT changed */ |
1474 | changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT; | |
ae5eb026 | 1475 | ieee80211_bss_info_change_notify(sdata, changed); |
8e268e47 | 1476 | |
07ba55d7 | 1477 | /* remove AP and TDLS peers */ |
e69e95db | 1478 | if (remove_sta) |
07ba55d7 | 1479 | sta_info_flush(local, sdata); |
b9dcf712 JB |
1480 | |
1481 | del_timer_sync(&sdata->u.mgd.conn_mon_timer); | |
1482 | del_timer_sync(&sdata->u.mgd.bcn_mon_timer); | |
1483 | del_timer_sync(&sdata->u.mgd.timer); | |
1484 | del_timer_sync(&sdata->u.mgd.chswitch_timer); | |
aa458d17 | 1485 | } |
f0706e82 | 1486 | |
3cf335d5 KV |
1487 | void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata, |
1488 | struct ieee80211_hdr *hdr) | |
1489 | { | |
1490 | /* | |
1491 | * We can postpone the mgd.timer whenever receiving unicast frames | |
1492 | * from AP because we know that the connection is working both ways | |
1493 | * at that time. But multicast frames (and hence also beacons) must | |
1494 | * be ignored here, because we need to trigger the timer during | |
b291ba11 JB |
1495 | * data idle periods for sending the periodic probe request to the |
1496 | * AP we're connected to. | |
3cf335d5 | 1497 | */ |
b291ba11 JB |
1498 | if (is_multicast_ether_addr(hdr->addr1)) |
1499 | return; | |
1500 | ||
be099e82 | 1501 | ieee80211_sta_reset_conn_monitor(sdata); |
3cf335d5 | 1502 | } |
f0706e82 | 1503 | |
4e5ff376 FF |
1504 | static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata) |
1505 | { | |
1506 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
1507 | ||
1508 | if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL | | |
1509 | IEEE80211_STA_CONNECTION_POLL))) | |
1510 | return; | |
1511 | ||
1512 | ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL | | |
1513 | IEEE80211_STA_BEACON_POLL); | |
1514 | mutex_lock(&sdata->local->iflist_mtx); | |
1515 | ieee80211_recalc_ps(sdata->local, -1); | |
1516 | mutex_unlock(&sdata->local->iflist_mtx); | |
1517 | ||
1518 | if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR) | |
1519 | return; | |
1520 | ||
1521 | /* | |
1522 | * We've received a probe response, but are not sure whether | |
1523 | * we have or will be receiving any beacons or data, so let's | |
1524 | * schedule the timers again, just in case. | |
1525 | */ | |
1526 | ieee80211_sta_reset_beacon_monitor(sdata); | |
1527 | ||
1528 | mod_timer(&ifmgd->conn_mon_timer, | |
1529 | round_jiffies_up(jiffies + | |
1530 | IEEE80211_CONNECTION_IDLE_TIME)); | |
1531 | } | |
1532 | ||
1533 | void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata, | |
04ac3c0e | 1534 | struct ieee80211_hdr *hdr, bool ack) |
4e5ff376 | 1535 | { |
75706d0e | 1536 | if (!ieee80211_is_data(hdr->frame_control)) |
4e5ff376 FF |
1537 | return; |
1538 | ||
04ac3c0e FF |
1539 | if (ack) |
1540 | ieee80211_sta_reset_conn_monitor(sdata); | |
4e5ff376 FF |
1541 | |
1542 | if (ieee80211_is_nullfunc(hdr->frame_control) && | |
1543 | sdata->u.mgd.probe_send_count > 0) { | |
04ac3c0e FF |
1544 | if (ack) |
1545 | sdata->u.mgd.probe_send_count = 0; | |
1546 | else | |
1547 | sdata->u.mgd.nullfunc_failed = true; | |
4e5ff376 FF |
1548 | ieee80211_queue_work(&sdata->local->hw, &sdata->work); |
1549 | } | |
1550 | } | |
1551 | ||
a43abf29 ML |
1552 | static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) |
1553 | { | |
1554 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
1555 | const u8 *ssid; | |
f01a067d | 1556 | u8 *dst = ifmgd->associated->bssid; |
180205bd | 1557 | u8 unicast_limit = max(1, max_probe_tries - 3); |
f01a067d LR |
1558 | |
1559 | /* | |
1560 | * Try sending broadcast probe requests for the last three | |
1561 | * probe requests after the first ones failed since some | |
1562 | * buggy APs only support broadcast probe requests. | |
1563 | */ | |
1564 | if (ifmgd->probe_send_count >= unicast_limit) | |
1565 | dst = NULL; | |
a43abf29 | 1566 | |
4e5ff376 FF |
1567 | /* |
1568 | * When the hardware reports an accurate Tx ACK status, it's | |
1569 | * better to send a nullfunc frame instead of a probe request, | |
1570 | * as it will kick us off the AP quickly if we aren't associated | |
1571 | * anymore. The timeout will be reset if the frame is ACKed by | |
1572 | * the AP. | |
1573 | */ | |
04ac3c0e FF |
1574 | if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) { |
1575 | ifmgd->nullfunc_failed = false; | |
4e5ff376 | 1576 | ieee80211_send_nullfunc(sdata->local, sdata, 0); |
04ac3c0e | 1577 | } else { |
4e5ff376 | 1578 | ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID); |
a806c558 | 1579 | ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid[1], NULL, 0, |
aad14ceb | 1580 | (u32) -1, true, false); |
4e5ff376 | 1581 | } |
a43abf29 ML |
1582 | |
1583 | ifmgd->probe_send_count++; | |
180205bd | 1584 | ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms); |
a43abf29 ML |
1585 | run_again(ifmgd, ifmgd->probe_timeout); |
1586 | } | |
1587 | ||
b291ba11 JB |
1588 | static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, |
1589 | bool beacon) | |
04de8381 | 1590 | { |
04de8381 | 1591 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
b291ba11 | 1592 | bool already = false; |
34bfc411 | 1593 | |
9607e6b6 | 1594 | if (!ieee80211_sdata_running(sdata)) |
0e2b6286 JB |
1595 | return; |
1596 | ||
91a3bd76 LR |
1597 | if (sdata->local->scanning) |
1598 | return; | |
1599 | ||
b8bc4b0a JB |
1600 | if (sdata->local->tmp_channel) |
1601 | return; | |
1602 | ||
77fdaa12 JB |
1603 | mutex_lock(&ifmgd->mtx); |
1604 | ||
1605 | if (!ifmgd->associated) | |
1606 | goto out; | |
1607 | ||
a860402d | 1608 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
b291ba11 JB |
1609 | if (beacon && net_ratelimit()) |
1610 | printk(KERN_DEBUG "%s: detected beacon loss from AP " | |
47846c9b | 1611 | "- sending probe request\n", sdata->name); |
a860402d | 1612 | #endif |
04de8381 | 1613 | |
b291ba11 JB |
1614 | /* |
1615 | * The driver/our work has already reported this event or the | |
1616 | * connection monitoring has kicked in and we have already sent | |
1617 | * a probe request. Or maybe the AP died and the driver keeps | |
1618 | * reporting until we disassociate... | |
1619 | * | |
1620 | * In either case we have to ignore the current call to this | |
1621 | * function (except for setting the correct probe reason bit) | |
1622 | * because otherwise we would reset the timer every time and | |
1623 | * never check whether we received a probe response! | |
1624 | */ | |
1625 | if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL | | |
1626 | IEEE80211_STA_CONNECTION_POLL)) | |
1627 | already = true; | |
1628 | ||
1629 | if (beacon) | |
1630 | ifmgd->flags |= IEEE80211_STA_BEACON_POLL; | |
1631 | else | |
1632 | ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; | |
1633 | ||
1634 | if (already) | |
1635 | goto out; | |
1636 | ||
4e751843 JB |
1637 | mutex_lock(&sdata->local->iflist_mtx); |
1638 | ieee80211_recalc_ps(sdata->local, -1); | |
1639 | mutex_unlock(&sdata->local->iflist_mtx); | |
1640 | ||
a43abf29 ML |
1641 | ifmgd->probe_send_count = 0; |
1642 | ieee80211_mgd_probe_ap_send(sdata); | |
77fdaa12 JB |
1643 | out: |
1644 | mutex_unlock(&ifmgd->mtx); | |
04de8381 KV |
1645 | } |
1646 | ||
a619a4c0 JO |
1647 | struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, |
1648 | struct ieee80211_vif *vif) | |
1649 | { | |
1650 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
1651 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
1652 | struct sk_buff *skb; | |
1653 | const u8 *ssid; | |
1654 | ||
1655 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) | |
1656 | return NULL; | |
1657 | ||
1658 | ASSERT_MGD_MTX(ifmgd); | |
1659 | ||
1660 | if (!ifmgd->associated) | |
1661 | return NULL; | |
1662 | ||
1663 | ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID); | |
1664 | skb = ieee80211_build_probe_req(sdata, ifmgd->associated->bssid, | |
85a237fe JB |
1665 | (u32) -1, ssid + 2, ssid[1], |
1666 | NULL, 0, true); | |
a619a4c0 JO |
1667 | |
1668 | return skb; | |
1669 | } | |
1670 | EXPORT_SYMBOL(ieee80211_ap_probereq_get); | |
1671 | ||
1e4dcd01 JO |
1672 | static void __ieee80211_connection_loss(struct ieee80211_sub_if_data *sdata) |
1673 | { | |
1674 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
1675 | struct ieee80211_local *local = sdata->local; | |
1676 | u8 bssid[ETH_ALEN]; | |
1677 | ||
1678 | mutex_lock(&ifmgd->mtx); | |
1679 | if (!ifmgd->associated) { | |
1680 | mutex_unlock(&ifmgd->mtx); | |
1681 | return; | |
1682 | } | |
1683 | ||
1684 | memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); | |
1685 | ||
180205bd BG |
1686 | printk(KERN_DEBUG "%s: Connection to AP %pM lost.\n", |
1687 | sdata->name, bssid); | |
1e4dcd01 | 1688 | |
53f73c09 | 1689 | ieee80211_set_disassoc(sdata, true, true); |
1e4dcd01 | 1690 | mutex_unlock(&ifmgd->mtx); |
7da7cc1d | 1691 | |
1e4dcd01 JO |
1692 | /* |
1693 | * must be outside lock due to cfg80211, | |
1694 | * but that's not a problem. | |
1695 | */ | |
1696 | ieee80211_send_deauth_disassoc(sdata, bssid, | |
1697 | IEEE80211_STYPE_DEAUTH, | |
1698 | WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, | |
d5cdfacb | 1699 | NULL, true); |
fcac4fb0 FF |
1700 | |
1701 | mutex_lock(&local->mtx); | |
1702 | ieee80211_recalc_idle(local); | |
1703 | mutex_unlock(&local->mtx); | |
1e4dcd01 JO |
1704 | } |
1705 | ||
1706 | void ieee80211_beacon_connection_loss_work(struct work_struct *work) | |
b291ba11 JB |
1707 | { |
1708 | struct ieee80211_sub_if_data *sdata = | |
1709 | container_of(work, struct ieee80211_sub_if_data, | |
1e4dcd01 | 1710 | u.mgd.beacon_connection_loss_work); |
a85e1d55 PS |
1711 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
1712 | struct sta_info *sta; | |
1713 | ||
1714 | if (ifmgd->associated) { | |
30fa9047 | 1715 | rcu_read_lock(); |
a85e1d55 PS |
1716 | sta = sta_info_get(sdata, ifmgd->bssid); |
1717 | if (sta) | |
1718 | sta->beacon_loss_count++; | |
30fa9047 | 1719 | rcu_read_unlock(); |
a85e1d55 | 1720 | } |
b291ba11 | 1721 | |
1e4dcd01 JO |
1722 | if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR) |
1723 | __ieee80211_connection_loss(sdata); | |
1724 | else | |
1725 | ieee80211_mgd_probe_ap(sdata, true); | |
b291ba11 JB |
1726 | } |
1727 | ||
04de8381 KV |
1728 | void ieee80211_beacon_loss(struct ieee80211_vif *vif) |
1729 | { | |
1730 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
1e4dcd01 | 1731 | struct ieee80211_hw *hw = &sdata->local->hw; |
04de8381 | 1732 | |
b5878a2d JB |
1733 | trace_api_beacon_loss(sdata); |
1734 | ||
1e4dcd01 JO |
1735 | WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR); |
1736 | ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); | |
04de8381 KV |
1737 | } |
1738 | EXPORT_SYMBOL(ieee80211_beacon_loss); | |
1739 | ||
1e4dcd01 JO |
1740 | void ieee80211_connection_loss(struct ieee80211_vif *vif) |
1741 | { | |
1742 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
1743 | struct ieee80211_hw *hw = &sdata->local->hw; | |
1744 | ||
b5878a2d JB |
1745 | trace_api_connection_loss(sdata); |
1746 | ||
1e4dcd01 JO |
1747 | WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR)); |
1748 | ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); | |
1749 | } | |
1750 | EXPORT_SYMBOL(ieee80211_connection_loss); | |
1751 | ||
1752 | ||
66e67e41 JB |
1753 | static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata, |
1754 | bool assoc) | |
1755 | { | |
1756 | struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; | |
1757 | ||
1758 | lockdep_assert_held(&sdata->u.mgd.mtx); | |
1759 | ||
1760 | if (auth_data->synced) | |
1761 | drv_finish_tx_sync(sdata->local, sdata, | |
1762 | auth_data->bss->bssid, | |
1763 | IEEE80211_TX_SYNC_AUTH); | |
1764 | ||
1765 | if (!assoc) { | |
1766 | sta_info_destroy_addr(sdata, auth_data->bss->bssid); | |
1767 | ||
1768 | memset(sdata->u.mgd.bssid, 0, ETH_ALEN); | |
1769 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); | |
1770 | } | |
1771 | ||
1772 | cfg80211_put_bss(auth_data->bss); | |
1773 | kfree(auth_data); | |
1774 | sdata->u.mgd.auth_data = NULL; | |
1775 | } | |
1776 | ||
1777 | static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, | |
1778 | struct ieee80211_mgmt *mgmt, size_t len) | |
1779 | { | |
1780 | struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; | |
1781 | u8 *pos; | |
1782 | struct ieee802_11_elems elems; | |
1783 | ||
1784 | pos = mgmt->u.auth.variable; | |
1785 | ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems); | |
1786 | if (!elems.challenge) | |
1787 | return; | |
1788 | auth_data->expected_transaction = 4; | |
1789 | ieee80211_send_auth(sdata, 3, auth_data->algorithm, | |
1790 | elems.challenge - 2, elems.challenge_len + 2, | |
1791 | auth_data->bss->bssid, auth_data->bss->bssid, | |
1792 | auth_data->key, auth_data->key_len, | |
1793 | auth_data->key_idx); | |
1794 | } | |
1795 | ||
1796 | static enum rx_mgmt_action __must_check | |
1797 | ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, | |
1798 | struct ieee80211_mgmt *mgmt, size_t len) | |
1799 | { | |
1800 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
1801 | u8 bssid[ETH_ALEN]; | |
1802 | u16 auth_alg, auth_transaction, status_code; | |
1803 | struct sta_info *sta; | |
1804 | ||
1805 | lockdep_assert_held(&ifmgd->mtx); | |
1806 | ||
1807 | if (len < 24 + 6) | |
1808 | return RX_MGMT_NONE; | |
1809 | ||
1810 | if (!ifmgd->auth_data || ifmgd->auth_data->done) | |
1811 | return RX_MGMT_NONE; | |
1812 | ||
1813 | memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN); | |
1814 | ||
1815 | if (memcmp(bssid, mgmt->bssid, ETH_ALEN)) | |
1816 | return RX_MGMT_NONE; | |
1817 | ||
1818 | auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); | |
1819 | auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); | |
1820 | status_code = le16_to_cpu(mgmt->u.auth.status_code); | |
1821 | ||
1822 | if (auth_alg != ifmgd->auth_data->algorithm || | |
1823 | auth_transaction != ifmgd->auth_data->expected_transaction) | |
1824 | return RX_MGMT_NONE; | |
1825 | ||
1826 | if (status_code != WLAN_STATUS_SUCCESS) { | |
1827 | printk(KERN_DEBUG "%s: %pM denied authentication (status %d)\n", | |
1828 | sdata->name, mgmt->sa, status_code); | |
1829 | goto out; | |
1830 | } | |
1831 | ||
1832 | switch (ifmgd->auth_data->algorithm) { | |
1833 | case WLAN_AUTH_OPEN: | |
1834 | case WLAN_AUTH_LEAP: | |
1835 | case WLAN_AUTH_FT: | |
1836 | break; | |
1837 | case WLAN_AUTH_SHARED_KEY: | |
1838 | if (ifmgd->auth_data->expected_transaction != 4) { | |
1839 | ieee80211_auth_challenge(sdata, mgmt, len); | |
1840 | /* need another frame */ | |
1841 | return RX_MGMT_NONE; | |
1842 | } | |
1843 | break; | |
1844 | default: | |
1845 | WARN_ONCE(1, "invalid auth alg %d", | |
1846 | ifmgd->auth_data->algorithm); | |
1847 | return RX_MGMT_NONE; | |
1848 | } | |
1849 | ||
1850 | printk(KERN_DEBUG "%s: authenticated\n", sdata->name); | |
1851 | out: | |
1852 | if (ifmgd->auth_data->synced) | |
1853 | drv_finish_tx_sync(sdata->local, sdata, bssid, | |
1854 | IEEE80211_TX_SYNC_AUTH); | |
1855 | ifmgd->auth_data->synced = false; | |
1856 | ifmgd->auth_data->done = true; | |
1857 | ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC; | |
1858 | run_again(ifmgd, ifmgd->auth_data->timeout); | |
1859 | ||
1860 | /* move station state to auth */ | |
1861 | mutex_lock(&sdata->local->sta_mtx); | |
1862 | sta = sta_info_get(sdata, bssid); | |
1863 | if (!sta) { | |
1864 | WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid); | |
1865 | goto out_err; | |
1866 | } | |
1867 | if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) { | |
1868 | printk(KERN_DEBUG "%s: failed moving %pM to auth\n", | |
1869 | sdata->name, bssid); | |
1870 | goto out_err; | |
1871 | } | |
1872 | mutex_unlock(&sdata->local->sta_mtx); | |
1873 | ||
1874 | return RX_MGMT_CFG80211_RX_AUTH; | |
1875 | out_err: | |
1876 | mutex_unlock(&sdata->local->sta_mtx); | |
1877 | /* ignore frame -- wait for timeout */ | |
1878 | return RX_MGMT_NONE; | |
1879 | } | |
1880 | ||
1881 | ||
77fdaa12 JB |
1882 | static enum rx_mgmt_action __must_check |
1883 | ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, | |
77fdaa12 | 1884 | struct ieee80211_mgmt *mgmt, size_t len) |
f0706e82 | 1885 | { |
46900298 | 1886 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
77fdaa12 | 1887 | const u8 *bssid = NULL; |
f0706e82 JB |
1888 | u16 reason_code; |
1889 | ||
66e67e41 JB |
1890 | lockdep_assert_held(&ifmgd->mtx); |
1891 | ||
f4ea83dd | 1892 | if (len < 24 + 2) |
77fdaa12 | 1893 | return RX_MGMT_NONE; |
f0706e82 | 1894 | |
66e67e41 JB |
1895 | if (!ifmgd->associated || |
1896 | memcmp(mgmt->bssid, ifmgd->associated->bssid, ETH_ALEN)) | |
1897 | return RX_MGMT_NONE; | |
77fdaa12 | 1898 | |
0c1ad2ca | 1899 | bssid = ifmgd->associated->bssid; |
f0706e82 JB |
1900 | |
1901 | reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); | |
1902 | ||
77fdaa12 | 1903 | printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n", |
47846c9b | 1904 | sdata->name, bssid, reason_code); |
77fdaa12 | 1905 | |
53f73c09 | 1906 | ieee80211_set_disassoc(sdata, true, false); |
7da7cc1d | 1907 | mutex_lock(&sdata->local->mtx); |
63f170e0 | 1908 | ieee80211_recalc_idle(sdata->local); |
7da7cc1d | 1909 | mutex_unlock(&sdata->local->mtx); |
f0706e82 | 1910 | |
77fdaa12 | 1911 | return RX_MGMT_CFG80211_DEAUTH; |
f0706e82 JB |
1912 | } |
1913 | ||
1914 | ||
77fdaa12 JB |
1915 | static enum rx_mgmt_action __must_check |
1916 | ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, | |
1917 | struct ieee80211_mgmt *mgmt, size_t len) | |
f0706e82 | 1918 | { |
46900298 | 1919 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f0706e82 JB |
1920 | u16 reason_code; |
1921 | ||
66e67e41 | 1922 | lockdep_assert_held(&ifmgd->mtx); |
77fdaa12 | 1923 | |
66e67e41 | 1924 | if (len < 24 + 2) |
77fdaa12 JB |
1925 | return RX_MGMT_NONE; |
1926 | ||
66e67e41 JB |
1927 | if (!ifmgd->associated || |
1928 | memcmp(mgmt->bssid, ifmgd->associated->bssid, ETH_ALEN)) | |
77fdaa12 | 1929 | return RX_MGMT_NONE; |
f0706e82 JB |
1930 | |
1931 | reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); | |
1932 | ||
0ff71613 | 1933 | printk(KERN_DEBUG "%s: disassociated from %pM (Reason: %u)\n", |
47846c9b | 1934 | sdata->name, mgmt->sa, reason_code); |
f0706e82 | 1935 | |
53f73c09 | 1936 | ieee80211_set_disassoc(sdata, true, false); |
7da7cc1d | 1937 | mutex_lock(&sdata->local->mtx); |
bc83b681 | 1938 | ieee80211_recalc_idle(sdata->local); |
7da7cc1d | 1939 | mutex_unlock(&sdata->local->mtx); |
77fdaa12 | 1940 | return RX_MGMT_CFG80211_DISASSOC; |
f0706e82 JB |
1941 | } |
1942 | ||
c74d084f CL |
1943 | static void ieee80211_get_rates(struct ieee80211_supported_band *sband, |
1944 | u8 *supp_rates, unsigned int supp_rates_len, | |
1945 | u32 *rates, u32 *basic_rates, | |
1946 | bool *have_higher_than_11mbit, | |
1947 | int *min_rate, int *min_rate_index) | |
1948 | { | |
1949 | int i, j; | |
1950 | ||
1951 | for (i = 0; i < supp_rates_len; i++) { | |
1952 | int rate = (supp_rates[i] & 0x7f) * 5; | |
1953 | bool is_basic = !!(supp_rates[i] & 0x80); | |
1954 | ||
1955 | if (rate > 110) | |
1956 | *have_higher_than_11mbit = true; | |
1957 | ||
1958 | /* | |
1959 | * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009 | |
1960 | * 7.3.2.2 as a magic value instead of a rate. Hence, skip it. | |
1961 | * | |
1962 | * Note: Even through the membership selector and the basic | |
1963 | * rate flag share the same bit, they are not exactly | |
1964 | * the same. | |
1965 | */ | |
1966 | if (!!(supp_rates[i] & 0x80) && | |
1967 | (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY) | |
1968 | continue; | |
1969 | ||
1970 | for (j = 0; j < sband->n_bitrates; j++) { | |
1971 | if (sband->bitrates[j].bitrate == rate) { | |
1972 | *rates |= BIT(j); | |
1973 | if (is_basic) | |
1974 | *basic_rates |= BIT(j); | |
1975 | if (rate < *min_rate) { | |
1976 | *min_rate = rate; | |
1977 | *min_rate_index = j; | |
1978 | } | |
1979 | break; | |
1980 | } | |
1981 | } | |
1982 | } | |
1983 | } | |
f0706e82 | 1984 | |
66e67e41 JB |
1985 | static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, |
1986 | bool assoc) | |
1987 | { | |
1988 | struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; | |
1989 | ||
1990 | lockdep_assert_held(&sdata->u.mgd.mtx); | |
1991 | ||
1992 | if (assoc_data->synced) | |
1993 | drv_finish_tx_sync(sdata->local, sdata, | |
1994 | assoc_data->bss->bssid, | |
1995 | IEEE80211_TX_SYNC_ASSOC); | |
1996 | ||
1997 | if (!assoc) { | |
1998 | sta_info_destroy_addr(sdata, assoc_data->bss->bssid); | |
1999 | ||
2000 | memset(sdata->u.mgd.bssid, 0, ETH_ALEN); | |
2001 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); | |
2002 | } | |
2003 | ||
2004 | kfree(assoc_data); | |
2005 | sdata->u.mgd.assoc_data = NULL; | |
2006 | } | |
2007 | ||
2008 | static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, | |
2009 | struct cfg80211_bss *cbss, | |
af6b6374 | 2010 | struct ieee80211_mgmt *mgmt, size_t len) |
f0706e82 | 2011 | { |
46900298 | 2012 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
471b3efd | 2013 | struct ieee80211_local *local = sdata->local; |
8318d78a | 2014 | struct ieee80211_supported_band *sband; |
f0706e82 | 2015 | struct sta_info *sta; |
af6b6374 | 2016 | u8 *pos; |
881d948c | 2017 | u32 rates, basic_rates; |
af6b6374 | 2018 | u16 capab_info, aid; |
f0706e82 | 2019 | struct ieee802_11_elems elems; |
bda3933a | 2020 | struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; |
ae5eb026 | 2021 | u32 changed = 0; |
c74d084f | 2022 | int err; |
5d1ec85f | 2023 | bool have_higher_than_11mbit = false; |
ae5eb026 | 2024 | u16 ap_ht_cap_flags; |
3432f923 | 2025 | int min_rate = INT_MAX, min_rate_index = -1; |
f0706e82 | 2026 | |
af6b6374 | 2027 | /* AssocResp and ReassocResp have identical structure */ |
f0706e82 | 2028 | |
f0706e82 | 2029 | aid = le16_to_cpu(mgmt->u.assoc_resp.aid); |
af6b6374 | 2030 | capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); |
f0706e82 | 2031 | |
1dd84aa2 | 2032 | if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14))) |
05cb9108 JB |
2033 | printk(KERN_DEBUG |
2034 | "%s: invalid AID value 0x%x; bits 15:14 not set\n", | |
2035 | sdata->name, aid); | |
1dd84aa2 JB |
2036 | aid &= ~(BIT(15) | BIT(14)); |
2037 | ||
05cb9108 JB |
2038 | ifmgd->broken_ap = false; |
2039 | ||
2040 | if (aid == 0 || aid > IEEE80211_MAX_AID) { | |
2041 | printk(KERN_DEBUG | |
2042 | "%s: invalid AID value %d (out of range), turn off PS\n", | |
2043 | sdata->name, aid); | |
2044 | aid = 0; | |
2045 | ifmgd->broken_ap = true; | |
2046 | } | |
2047 | ||
af6b6374 JB |
2048 | pos = mgmt->u.assoc_resp.variable; |
2049 | ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems); | |
2050 | ||
f0706e82 JB |
2051 | if (!elems.supp_rates) { |
2052 | printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n", | |
47846c9b | 2053 | sdata->name); |
af6b6374 | 2054 | return false; |
f0706e82 JB |
2055 | } |
2056 | ||
46900298 | 2057 | ifmgd->aid = aid; |
f0706e82 | 2058 | |
2a33bee2 GE |
2059 | mutex_lock(&sdata->local->sta_mtx); |
2060 | /* | |
2061 | * station info was already allocated and inserted before | |
2062 | * the association and should be available to us | |
2063 | */ | |
7852e361 | 2064 | sta = sta_info_get(sdata, cbss->bssid); |
2a33bee2 GE |
2065 | if (WARN_ON(!sta)) { |
2066 | mutex_unlock(&sdata->local->sta_mtx); | |
af6b6374 | 2067 | return false; |
77fdaa12 | 2068 | } |
05e5e883 | 2069 | |
60f8b39c JB |
2070 | rates = 0; |
2071 | basic_rates = 0; | |
66e67e41 | 2072 | sband = local->hw.wiphy->bands[local->oper_channel->band]; |
f709fc69 | 2073 | |
c74d084f CL |
2074 | ieee80211_get_rates(sband, elems.supp_rates, elems.supp_rates_len, |
2075 | &rates, &basic_rates, &have_higher_than_11mbit, | |
2076 | &min_rate, &min_rate_index); | |
f0706e82 | 2077 | |
c74d084f CL |
2078 | ieee80211_get_rates(sband, elems.ext_supp_rates, |
2079 | elems.ext_supp_rates_len, &rates, &basic_rates, | |
2080 | &have_higher_than_11mbit, | |
2081 | &min_rate, &min_rate_index); | |
f0706e82 | 2082 | |
3432f923 EP |
2083 | /* |
2084 | * some buggy APs don't advertise basic_rates. use the lowest | |
2085 | * supported rate instead. | |
2086 | */ | |
2087 | if (unlikely(!basic_rates) && min_rate_index >= 0) { | |
2088 | printk(KERN_DEBUG "%s: No basic rates in AssocResp. " | |
2089 | "Using min supported rate instead.\n", sdata->name); | |
2090 | basic_rates = BIT(min_rate_index); | |
2091 | } | |
2092 | ||
66e67e41 | 2093 | sta->sta.supp_rates[local->oper_channel->band] = rates; |
bda3933a | 2094 | sdata->vif.bss_conf.basic_rates = basic_rates; |
60f8b39c JB |
2095 | |
2096 | /* cf. IEEE 802.11 9.2.12 */ | |
66e67e41 | 2097 | if (local->oper_channel->band == IEEE80211_BAND_2GHZ && |
60f8b39c JB |
2098 | have_higher_than_11mbit) |
2099 | sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; | |
2100 | else | |
2101 | sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; | |
f0706e82 | 2102 | |
ab1faead | 2103 | if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) |
ef96a842 | 2104 | ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, |
d9fe60de | 2105 | elems.ht_cap_elem, &sta->sta.ht_cap); |
ae5eb026 JB |
2106 | |
2107 | ap_ht_cap_flags = sta->sta.ht_cap.cap; | |
f0706e82 | 2108 | |
4b7679a5 | 2109 | rate_control_rate_init(sta); |
f0706e82 | 2110 | |
46900298 | 2111 | if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) |
c2c98fde | 2112 | set_sta_flag(sta, WLAN_STA_MFP); |
5394af4d | 2113 | |
ddf4ac53 | 2114 | if (elems.wmm_param) |
c2c98fde | 2115 | set_sta_flag(sta, WLAN_STA_WME); |
ddf4ac53 | 2116 | |
c8987876 JB |
2117 | err = sta_info_move_state(sta, IEEE80211_STA_AUTH); |
2118 | if (!err) | |
2119 | err = sta_info_move_state(sta, IEEE80211_STA_ASSOC); | |
2120 | if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) | |
2121 | err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED); | |
2122 | if (err) { | |
2123 | printk(KERN_DEBUG | |
2124 | "%s: failed to move station %pM to desired state\n", | |
2125 | sdata->name, sta->sta.addr); | |
2126 | WARN_ON(__sta_info_destroy(sta)); | |
2127 | mutex_unlock(&sdata->local->sta_mtx); | |
2128 | return false; | |
2129 | } | |
2130 | ||
7852e361 | 2131 | mutex_unlock(&sdata->local->sta_mtx); |
ddf4ac53 | 2132 | |
f2176d72 JO |
2133 | /* |
2134 | * Always handle WMM once after association regardless | |
2135 | * of the first value the AP uses. Setting -1 here has | |
2136 | * that effect because the AP values is an unsigned | |
2137 | * 4-bit value. | |
2138 | */ | |
2139 | ifmgd->wmm_last_param_set = -1; | |
2140 | ||
ddf4ac53 | 2141 | if (elems.wmm_param) |
4ced3f74 | 2142 | ieee80211_sta_wmm_params(local, sdata, elems.wmm_param, |
60f8b39c | 2143 | elems.wmm_param_len); |
aa837e1d JB |
2144 | else |
2145 | ieee80211_set_wmm_default(sdata); | |
f0706e82 | 2146 | |
ae5eb026 | 2147 | if (elems.ht_info_elem && elems.wmm_param && |
af6b6374 | 2148 | (sdata->local->hw.queues >= 4) && |
ab1faead | 2149 | !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) |
ae5eb026 | 2150 | changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem, |
7cc44ed4 RM |
2151 | cbss->bssid, ap_ht_cap_flags, |
2152 | false); | |
ae5eb026 | 2153 | |
60f8b39c JB |
2154 | /* set AID and assoc capability, |
2155 | * ieee80211_set_associated() will tell the driver */ | |
2156 | bss_conf->aid = aid; | |
2157 | bss_conf->assoc_capability = capab_info; | |
0c1ad2ca | 2158 | ieee80211_set_associated(sdata, cbss, changed); |
f0706e82 | 2159 | |
d524215f FF |
2160 | /* |
2161 | * If we're using 4-addr mode, let the AP know that we're | |
2162 | * doing so, so that it can create the STA VLAN on its side | |
2163 | */ | |
2164 | if (ifmgd->use_4addr) | |
2165 | ieee80211_send_4addr_nullfunc(local, sdata); | |
2166 | ||
15b7b062 | 2167 | /* |
b291ba11 JB |
2168 | * Start timer to probe the connection to the AP now. |
2169 | * Also start the timer that will detect beacon loss. | |
15b7b062 | 2170 | */ |
b291ba11 | 2171 | ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt); |
d3a910a8 | 2172 | ieee80211_sta_reset_beacon_monitor(sdata); |
15b7b062 | 2173 | |
af6b6374 | 2174 | return true; |
f0706e82 JB |
2175 | } |
2176 | ||
66e67e41 JB |
2177 | static enum rx_mgmt_action __must_check |
2178 | ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, | |
2179 | struct ieee80211_mgmt *mgmt, size_t len, | |
2180 | struct cfg80211_bss **bss) | |
2181 | { | |
2182 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
2183 | struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; | |
2184 | u16 capab_info, status_code, aid; | |
2185 | struct ieee802_11_elems elems; | |
2186 | u8 *pos; | |
2187 | bool reassoc; | |
2188 | ||
2189 | lockdep_assert_held(&ifmgd->mtx); | |
2190 | ||
2191 | if (!assoc_data) | |
2192 | return RX_MGMT_NONE; | |
2193 | if (memcmp(assoc_data->bss->bssid, mgmt->bssid, ETH_ALEN)) | |
2194 | return RX_MGMT_NONE; | |
2195 | ||
2196 | /* | |
2197 | * AssocResp and ReassocResp have identical structure, so process both | |
2198 | * of them in this function. | |
2199 | */ | |
2200 | ||
2201 | if (len < 24 + 6) | |
2202 | return RX_MGMT_NONE; | |
2203 | ||
2204 | reassoc = ieee80211_is_reassoc_req(mgmt->frame_control); | |
2205 | capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); | |
2206 | status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); | |
2207 | aid = le16_to_cpu(mgmt->u.assoc_resp.aid); | |
2208 | ||
2209 | printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x " | |
2210 | "status=%d aid=%d)\n", | |
2211 | sdata->name, reassoc ? "Rea" : "A", mgmt->sa, | |
2212 | capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); | |
2213 | ||
2214 | pos = mgmt->u.assoc_resp.variable; | |
2215 | ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems); | |
2216 | ||
2217 | if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && | |
2218 | elems.timeout_int && elems.timeout_int_len == 5 && | |
2219 | elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) { | |
2220 | u32 tu, ms; | |
2221 | tu = get_unaligned_le32(elems.timeout_int + 1); | |
2222 | ms = tu * 1024 / 1000; | |
2223 | printk(KERN_DEBUG "%s: %pM rejected association temporarily; " | |
2224 | "comeback duration %u TU (%u ms)\n", | |
2225 | sdata->name, mgmt->sa, tu, ms); | |
2226 | assoc_data->timeout = jiffies + msecs_to_jiffies(ms); | |
2227 | if (ms > IEEE80211_ASSOC_TIMEOUT) | |
2228 | run_again(ifmgd, assoc_data->timeout); | |
2229 | return RX_MGMT_NONE; | |
2230 | } | |
2231 | ||
2232 | *bss = assoc_data->bss; | |
2233 | ||
2234 | if (status_code != WLAN_STATUS_SUCCESS) { | |
2235 | printk(KERN_DEBUG "%s: %pM denied association (code=%d)\n", | |
2236 | sdata->name, mgmt->sa, status_code); | |
2237 | ieee80211_destroy_assoc_data(sdata, false); | |
2238 | } else { | |
2239 | printk(KERN_DEBUG "%s: associated\n", sdata->name); | |
2240 | ||
2241 | ieee80211_destroy_assoc_data(sdata, true); | |
f0706e82 | 2242 | |
66e67e41 JB |
2243 | if (!ieee80211_assoc_success(sdata, *bss, mgmt, len)) { |
2244 | /* oops -- internal error -- send timeout for now */ | |
2245 | sta_info_destroy_addr(sdata, mgmt->bssid); | |
2246 | cfg80211_put_bss(*bss); | |
2247 | return RX_MGMT_CFG80211_ASSOC_TIMEOUT; | |
2248 | } | |
2249 | } | |
2250 | ||
2251 | return RX_MGMT_CFG80211_RX_ASSOC; | |
2252 | } | |
98c8fccf JB |
2253 | static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, |
2254 | struct ieee80211_mgmt *mgmt, | |
2255 | size_t len, | |
2256 | struct ieee80211_rx_status *rx_status, | |
2257 | struct ieee802_11_elems *elems, | |
2258 | bool beacon) | |
2259 | { | |
2260 | struct ieee80211_local *local = sdata->local; | |
2261 | int freq; | |
c2b13452 | 2262 | struct ieee80211_bss *bss; |
98c8fccf | 2263 | struct ieee80211_channel *channel; |
56007a02 JB |
2264 | bool need_ps = false; |
2265 | ||
66e67e41 JB |
2266 | if (sdata->u.mgd.associated && |
2267 | memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid, | |
2268 | ETH_ALEN) == 0) { | |
56007a02 JB |
2269 | bss = (void *)sdata->u.mgd.associated->priv; |
2270 | /* not previously set so we may need to recalc */ | |
2271 | need_ps = !bss->dtim_period; | |
2272 | } | |
98c8fccf JB |
2273 | |
2274 | if (elems->ds_params && elems->ds_params_len == 1) | |
59eb21a6 BR |
2275 | freq = ieee80211_channel_to_frequency(elems->ds_params[0], |
2276 | rx_status->band); | |
98c8fccf JB |
2277 | else |
2278 | freq = rx_status->freq; | |
2279 | ||
2280 | channel = ieee80211_get_channel(local->hw.wiphy, freq); | |
2281 | ||
2282 | if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) | |
2283 | return; | |
2284 | ||
98c8fccf | 2285 | bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems, |
2a519311 | 2286 | channel, beacon); |
77fdaa12 JB |
2287 | if (bss) |
2288 | ieee80211_rx_bss_put(local, bss); | |
2289 | ||
2290 | if (!sdata->u.mgd.associated) | |
98c8fccf JB |
2291 | return; |
2292 | ||
56007a02 JB |
2293 | if (need_ps) { |
2294 | mutex_lock(&local->iflist_mtx); | |
2295 | ieee80211_recalc_ps(local, -1); | |
2296 | mutex_unlock(&local->iflist_mtx); | |
2297 | } | |
2298 | ||
c481ec97 | 2299 | if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) && |
0c1ad2ca | 2300 | (memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid, |
77fdaa12 | 2301 | ETH_ALEN) == 0)) { |
c481ec97 S |
2302 | struct ieee80211_channel_sw_ie *sw_elem = |
2303 | (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem; | |
5ce6e438 JB |
2304 | ieee80211_sta_process_chanswitch(sdata, sw_elem, |
2305 | bss, rx_status->mactime); | |
c481ec97 | 2306 | } |
f0706e82 JB |
2307 | } |
2308 | ||
2309 | ||
f698d856 | 2310 | static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata, |
af6b6374 | 2311 | struct sk_buff *skb) |
f0706e82 | 2312 | { |
af6b6374 | 2313 | struct ieee80211_mgmt *mgmt = (void *)skb->data; |
15b7b062 | 2314 | struct ieee80211_if_managed *ifmgd; |
af6b6374 JB |
2315 | struct ieee80211_rx_status *rx_status = (void *) skb->cb; |
2316 | size_t baselen, len = skb->len; | |
ae6a44e3 EK |
2317 | struct ieee802_11_elems elems; |
2318 | ||
15b7b062 KV |
2319 | ifmgd = &sdata->u.mgd; |
2320 | ||
77fdaa12 JB |
2321 | ASSERT_MGD_MTX(ifmgd); |
2322 | ||
47846c9b | 2323 | if (memcmp(mgmt->da, sdata->vif.addr, ETH_ALEN)) |
8e7cdbb6 TW |
2324 | return; /* ignore ProbeResp to foreign address */ |
2325 | ||
ae6a44e3 EK |
2326 | baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; |
2327 | if (baselen > len) | |
2328 | return; | |
2329 | ||
2330 | ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, | |
2331 | &elems); | |
2332 | ||
98c8fccf | 2333 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false); |
9859b81e | 2334 | |
77fdaa12 | 2335 | if (ifmgd->associated && |
4e5ff376 FF |
2336 | memcmp(mgmt->bssid, ifmgd->associated->bssid, ETH_ALEN) == 0) |
2337 | ieee80211_reset_ap_probe(sdata); | |
66e67e41 JB |
2338 | |
2339 | if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies && | |
2340 | memcmp(mgmt->bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN) == 0) { | |
2341 | /* got probe response, continue with auth */ | |
2342 | printk(KERN_DEBUG "%s: direct probe responded\n", sdata->name); | |
2343 | ifmgd->auth_data->tries = 0; | |
2344 | ifmgd->auth_data->timeout = jiffies; | |
2345 | run_again(ifmgd, ifmgd->auth_data->timeout); | |
2346 | } | |
f0706e82 JB |
2347 | } |
2348 | ||
d91f36db JB |
2349 | /* |
2350 | * This is the canonical list of information elements we care about, | |
2351 | * the filter code also gives us all changes to the Microsoft OUI | |
2352 | * (00:50:F2) vendor IE which is used for WMM which we need to track. | |
2353 | * | |
2354 | * We implement beacon filtering in software since that means we can | |
2355 | * avoid processing the frame here and in cfg80211, and userspace | |
2356 | * will not be able to tell whether the hardware supports it or not. | |
2357 | * | |
2358 | * XXX: This list needs to be dynamic -- userspace needs to be able to | |
2359 | * add items it requires. It also needs to be able to tell us to | |
2360 | * look out for other vendor IEs. | |
2361 | */ | |
2362 | static const u64 care_about_ies = | |
1d4df3a5 JB |
2363 | (1ULL << WLAN_EID_COUNTRY) | |
2364 | (1ULL << WLAN_EID_ERP_INFO) | | |
2365 | (1ULL << WLAN_EID_CHANNEL_SWITCH) | | |
2366 | (1ULL << WLAN_EID_PWR_CONSTRAINT) | | |
2367 | (1ULL << WLAN_EID_HT_CAPABILITY) | | |
2368 | (1ULL << WLAN_EID_HT_INFORMATION); | |
d91f36db | 2369 | |
f698d856 | 2370 | static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
2371 | struct ieee80211_mgmt *mgmt, |
2372 | size_t len, | |
2373 | struct ieee80211_rx_status *rx_status) | |
2374 | { | |
d91f36db | 2375 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
17e4ec14 | 2376 | struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; |
f0706e82 JB |
2377 | size_t baselen; |
2378 | struct ieee802_11_elems elems; | |
f698d856 | 2379 | struct ieee80211_local *local = sdata->local; |
471b3efd | 2380 | u32 changed = 0; |
d91f36db | 2381 | bool erp_valid, directed_tim = false; |
7a5158ef | 2382 | u8 erp_value = 0; |
d91f36db | 2383 | u32 ncrc; |
77fdaa12 JB |
2384 | u8 *bssid; |
2385 | ||
66e67e41 | 2386 | lockdep_assert_held(&ifmgd->mtx); |
f0706e82 | 2387 | |
ae6a44e3 EK |
2388 | /* Process beacon from the current BSS */ |
2389 | baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt; | |
2390 | if (baselen > len) | |
2391 | return; | |
2392 | ||
d91f36db | 2393 | if (rx_status->freq != local->hw.conf.channel->center_freq) |
f0706e82 | 2394 | return; |
f0706e82 | 2395 | |
66e67e41 JB |
2396 | if (ifmgd->assoc_data && !ifmgd->assoc_data->have_beacon && |
2397 | memcmp(mgmt->bssid, ifmgd->assoc_data->bss->bssid, ETH_ALEN) == 0) { | |
2398 | ieee802_11_parse_elems(mgmt->u.beacon.variable, | |
2399 | len - baselen, &elems); | |
77fdaa12 | 2400 | |
66e67e41 JB |
2401 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, |
2402 | false); | |
2403 | ifmgd->assoc_data->have_beacon = true; | |
2404 | ifmgd->assoc_data->sent_assoc = false; | |
2405 | /* continue assoc process */ | |
2406 | ifmgd->assoc_data->timeout = jiffies; | |
2407 | run_again(ifmgd, ifmgd->assoc_data->timeout); | |
2408 | return; | |
2409 | } | |
77fdaa12 | 2410 | |
66e67e41 JB |
2411 | if (!ifmgd->associated || |
2412 | memcmp(mgmt->bssid, ifmgd->associated->bssid, ETH_ALEN)) | |
f0706e82 | 2413 | return; |
66e67e41 | 2414 | bssid = ifmgd->associated->bssid; |
f0706e82 | 2415 | |
17e4ec14 JM |
2416 | /* Track average RSSI from the Beacon frames of the current AP */ |
2417 | ifmgd->last_beacon_signal = rx_status->signal; | |
2418 | if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) { | |
2419 | ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE; | |
3ba06c6f | 2420 | ifmgd->ave_beacon_signal = rx_status->signal * 16; |
17e4ec14 | 2421 | ifmgd->last_cqm_event_signal = 0; |
391a200a | 2422 | ifmgd->count_beacon_signal = 1; |
615f7b9b | 2423 | ifmgd->last_ave_beacon_signal = 0; |
17e4ec14 JM |
2424 | } else { |
2425 | ifmgd->ave_beacon_signal = | |
2426 | (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 + | |
2427 | (16 - IEEE80211_SIGNAL_AVE_WEIGHT) * | |
2428 | ifmgd->ave_beacon_signal) / 16; | |
391a200a | 2429 | ifmgd->count_beacon_signal++; |
17e4ec14 | 2430 | } |
615f7b9b MV |
2431 | |
2432 | if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold && | |
2433 | ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { | |
2434 | int sig = ifmgd->ave_beacon_signal; | |
2435 | int last_sig = ifmgd->last_ave_beacon_signal; | |
2436 | ||
2437 | /* | |
2438 | * if signal crosses either of the boundaries, invoke callback | |
2439 | * with appropriate parameters | |
2440 | */ | |
2441 | if (sig > ifmgd->rssi_max_thold && | |
2442 | (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) { | |
2443 | ifmgd->last_ave_beacon_signal = sig; | |
2444 | drv_rssi_callback(local, RSSI_EVENT_HIGH); | |
2445 | } else if (sig < ifmgd->rssi_min_thold && | |
2446 | (last_sig >= ifmgd->rssi_max_thold || | |
2447 | last_sig == 0)) { | |
2448 | ifmgd->last_ave_beacon_signal = sig; | |
2449 | drv_rssi_callback(local, RSSI_EVENT_LOW); | |
2450 | } | |
2451 | } | |
2452 | ||
17e4ec14 | 2453 | if (bss_conf->cqm_rssi_thold && |
391a200a | 2454 | ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT && |
ea086359 | 2455 | !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) { |
17e4ec14 JM |
2456 | int sig = ifmgd->ave_beacon_signal / 16; |
2457 | int last_event = ifmgd->last_cqm_event_signal; | |
2458 | int thold = bss_conf->cqm_rssi_thold; | |
2459 | int hyst = bss_conf->cqm_rssi_hyst; | |
2460 | if (sig < thold && | |
2461 | (last_event == 0 || sig < last_event - hyst)) { | |
2462 | ifmgd->last_cqm_event_signal = sig; | |
2463 | ieee80211_cqm_rssi_notify( | |
2464 | &sdata->vif, | |
2465 | NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, | |
2466 | GFP_KERNEL); | |
2467 | } else if (sig > thold && | |
2468 | (last_event == 0 || sig > last_event + hyst)) { | |
2469 | ifmgd->last_cqm_event_signal = sig; | |
2470 | ieee80211_cqm_rssi_notify( | |
2471 | &sdata->vif, | |
2472 | NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, | |
2473 | GFP_KERNEL); | |
2474 | } | |
2475 | } | |
2476 | ||
b291ba11 | 2477 | if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) { |
92778180 JM |
2478 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
2479 | if (net_ratelimit()) { | |
2480 | printk(KERN_DEBUG "%s: cancelling probereq poll due " | |
47846c9b | 2481 | "to a received beacon\n", sdata->name); |
92778180 JM |
2482 | } |
2483 | #endif | |
b291ba11 | 2484 | ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL; |
4e751843 JB |
2485 | mutex_lock(&local->iflist_mtx); |
2486 | ieee80211_recalc_ps(local, -1); | |
2487 | mutex_unlock(&local->iflist_mtx); | |
92778180 JM |
2488 | } |
2489 | ||
b291ba11 JB |
2490 | /* |
2491 | * Push the beacon loss detection into the future since | |
2492 | * we are processing a beacon from the AP just now. | |
2493 | */ | |
d3a910a8 | 2494 | ieee80211_sta_reset_beacon_monitor(sdata); |
b291ba11 | 2495 | |
d91f36db JB |
2496 | ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); |
2497 | ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable, | |
2498 | len - baselen, &elems, | |
2499 | care_about_ies, ncrc); | |
2500 | ||
2501 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) | |
e7ec86f5 JB |
2502 | directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len, |
2503 | ifmgd->aid); | |
d91f36db | 2504 | |
d8ec4433 | 2505 | if (ncrc != ifmgd->beacon_crc || !ifmgd->beacon_crc_valid) { |
30196673 JM |
2506 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, |
2507 | true); | |
d91f36db | 2508 | |
4ced3f74 | 2509 | ieee80211_sta_wmm_params(local, sdata, elems.wmm_param, |
30196673 JM |
2510 | elems.wmm_param_len); |
2511 | } | |
fe3fa827 | 2512 | |
25c9c875 | 2513 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) { |
1fb3606b | 2514 | if (directed_tim) { |
572e0012 KV |
2515 | if (local->hw.conf.dynamic_ps_timeout > 0) { |
2516 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; | |
2517 | ieee80211_hw_config(local, | |
2518 | IEEE80211_CONF_CHANGE_PS); | |
2519 | ieee80211_send_nullfunc(local, sdata, 0); | |
2520 | } else { | |
2521 | local->pspolling = true; | |
2522 | ||
2523 | /* | |
2524 | * Here is assumed that the driver will be | |
2525 | * able to send ps-poll frame and receive a | |
2526 | * response even though power save mode is | |
2527 | * enabled, but some drivers might require | |
2528 | * to disable power save here. This needs | |
2529 | * to be investigated. | |
2530 | */ | |
2531 | ieee80211_send_pspoll(local, sdata); | |
2532 | } | |
a97b77b9 VN |
2533 | } |
2534 | } | |
7a5158ef | 2535 | |
d8ec4433 | 2536 | if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid) |
30196673 JM |
2537 | return; |
2538 | ifmgd->beacon_crc = ncrc; | |
d8ec4433 | 2539 | ifmgd->beacon_crc_valid = true; |
30196673 | 2540 | |
7a5158ef JB |
2541 | if (elems.erp_info && elems.erp_info_len >= 1) { |
2542 | erp_valid = true; | |
2543 | erp_value = elems.erp_info[0]; | |
2544 | } else { | |
2545 | erp_valid = false; | |
50c4afb9 | 2546 | } |
7a5158ef JB |
2547 | changed |= ieee80211_handle_bss_capability(sdata, |
2548 | le16_to_cpu(mgmt->u.beacon.capab_info), | |
2549 | erp_valid, erp_value); | |
f0706e82 | 2550 | |
d3c990fb | 2551 | |
53d6f81c | 2552 | if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param && |
ab1faead | 2553 | !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) { |
ae5eb026 JB |
2554 | struct sta_info *sta; |
2555 | struct ieee80211_supported_band *sband; | |
2556 | u16 ap_ht_cap_flags; | |
2557 | ||
2558 | rcu_read_lock(); | |
2559 | ||
abe60632 | 2560 | sta = sta_info_get(sdata, bssid); |
77fdaa12 | 2561 | if (WARN_ON(!sta)) { |
ae5eb026 JB |
2562 | rcu_read_unlock(); |
2563 | return; | |
2564 | } | |
2565 | ||
2566 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
2567 | ||
ef96a842 | 2568 | ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, |
ae5eb026 JB |
2569 | elems.ht_cap_elem, &sta->sta.ht_cap); |
2570 | ||
2571 | ap_ht_cap_flags = sta->sta.ht_cap.cap; | |
2572 | ||
2573 | rcu_read_unlock(); | |
2574 | ||
2575 | changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem, | |
7cc44ed4 | 2576 | bssid, ap_ht_cap_flags, true); |
d3c990fb RR |
2577 | } |
2578 | ||
8b19e6ca | 2579 | /* Note: country IE parsing is done for us by cfg80211 */ |
3f2355cb | 2580 | if (elems.country_elem) { |
a8302de9 VT |
2581 | /* TODO: IBSS also needs this */ |
2582 | if (elems.pwr_constr_elem) | |
2583 | ieee80211_handle_pwr_constr(sdata, | |
2584 | le16_to_cpu(mgmt->u.probe_resp.capab_info), | |
2585 | elems.pwr_constr_elem, | |
2586 | elems.pwr_constr_elem_len); | |
3f2355cb LR |
2587 | } |
2588 | ||
471b3efd | 2589 | ieee80211_bss_info_change_notify(sdata, changed); |
f0706e82 JB |
2590 | } |
2591 | ||
1fa57d01 JB |
2592 | void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, |
2593 | struct sk_buff *skb) | |
f0706e82 | 2594 | { |
77fdaa12 | 2595 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f0706e82 | 2596 | struct ieee80211_rx_status *rx_status; |
f0706e82 | 2597 | struct ieee80211_mgmt *mgmt; |
66e67e41 | 2598 | struct cfg80211_bss *bss = NULL; |
77fdaa12 | 2599 | enum rx_mgmt_action rma = RX_MGMT_NONE; |
f0706e82 JB |
2600 | u16 fc; |
2601 | ||
f0706e82 JB |
2602 | rx_status = (struct ieee80211_rx_status *) skb->cb; |
2603 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
2604 | fc = le16_to_cpu(mgmt->frame_control); | |
2605 | ||
77fdaa12 JB |
2606 | mutex_lock(&ifmgd->mtx); |
2607 | ||
66e67e41 JB |
2608 | switch (fc & IEEE80211_FCTL_STYPE) { |
2609 | case IEEE80211_STYPE_BEACON: | |
2610 | ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status); | |
2611 | break; | |
2612 | case IEEE80211_STYPE_PROBE_RESP: | |
2613 | ieee80211_rx_mgmt_probe_resp(sdata, skb); | |
2614 | break; | |
2615 | case IEEE80211_STYPE_AUTH: | |
2616 | rma = ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); | |
2617 | break; | |
2618 | case IEEE80211_STYPE_DEAUTH: | |
2619 | rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); | |
2620 | break; | |
2621 | case IEEE80211_STYPE_DISASSOC: | |
2622 | rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); | |
2623 | break; | |
2624 | case IEEE80211_STYPE_ASSOC_RESP: | |
2625 | case IEEE80211_STYPE_REASSOC_RESP: | |
2626 | rma = ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, &bss); | |
2627 | break; | |
2628 | case IEEE80211_STYPE_ACTION: | |
2629 | switch (mgmt->u.action.category) { | |
2630 | case WLAN_CATEGORY_SPECTRUM_MGMT: | |
2631 | ieee80211_sta_process_chanswitch(sdata, | |
2632 | &mgmt->u.action.u.chan_switch.sw_elem, | |
2633 | (void *)ifmgd->associated->priv, | |
2634 | rx_status->mactime); | |
77fdaa12 | 2635 | break; |
77fdaa12 | 2636 | } |
77fdaa12 | 2637 | } |
77fdaa12 JB |
2638 | mutex_unlock(&ifmgd->mtx); |
2639 | ||
66e67e41 JB |
2640 | switch (rma) { |
2641 | case RX_MGMT_NONE: | |
2642 | /* no action */ | |
2643 | break; | |
2644 | case RX_MGMT_CFG80211_DEAUTH: | |
ce470613 | 2645 | cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len); |
66e67e41 JB |
2646 | break; |
2647 | case RX_MGMT_CFG80211_DISASSOC: | |
2648 | cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len); | |
2649 | break; | |
2650 | case RX_MGMT_CFG80211_RX_AUTH: | |
2651 | cfg80211_send_rx_auth(sdata->dev, (u8 *)mgmt, skb->len); | |
2652 | break; | |
2653 | case RX_MGMT_CFG80211_RX_ASSOC: | |
2654 | cfg80211_send_rx_assoc(sdata->dev, bss, (u8 *)mgmt, skb->len); | |
2655 | break; | |
2656 | case RX_MGMT_CFG80211_ASSOC_TIMEOUT: | |
2657 | cfg80211_send_assoc_timeout(sdata->dev, mgmt->bssid); | |
2658 | break; | |
2659 | default: | |
2660 | WARN(1, "unexpected: %d", rma); | |
b054b747 | 2661 | } |
f0706e82 JB |
2662 | } |
2663 | ||
9c6bd790 | 2664 | static void ieee80211_sta_timer(unsigned long data) |
f0706e82 | 2665 | { |
60f8b39c JB |
2666 | struct ieee80211_sub_if_data *sdata = |
2667 | (struct ieee80211_sub_if_data *) data; | |
46900298 | 2668 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
60f8b39c | 2669 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 2670 | |
5bb644a0 JB |
2671 | if (local->quiescing) { |
2672 | set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running); | |
2673 | return; | |
2674 | } | |
2675 | ||
64592c8f | 2676 | ieee80211_queue_work(&local->hw, &sdata->work); |
f0706e82 JB |
2677 | } |
2678 | ||
04ac3c0e | 2679 | static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, |
95acac61 | 2680 | u8 *bssid, u8 reason) |
04ac3c0e FF |
2681 | { |
2682 | struct ieee80211_local *local = sdata->local; | |
2683 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
2684 | ||
2685 | ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL | | |
2686 | IEEE80211_STA_BEACON_POLL); | |
2687 | ||
2688 | ieee80211_set_disassoc(sdata, true, true); | |
2689 | mutex_unlock(&ifmgd->mtx); | |
04ac3c0e FF |
2690 | /* |
2691 | * must be outside lock due to cfg80211, | |
2692 | * but that's not a problem. | |
2693 | */ | |
2694 | ieee80211_send_deauth_disassoc(sdata, bssid, | |
95acac61 | 2695 | IEEE80211_STYPE_DEAUTH, reason, |
04ac3c0e | 2696 | NULL, true); |
fcac4fb0 FF |
2697 | |
2698 | mutex_lock(&local->mtx); | |
2699 | ieee80211_recalc_idle(local); | |
2700 | mutex_unlock(&local->mtx); | |
2701 | ||
04ac3c0e FF |
2702 | mutex_lock(&ifmgd->mtx); |
2703 | } | |
2704 | ||
66e67e41 JB |
2705 | static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata) |
2706 | { | |
2707 | struct ieee80211_local *local = sdata->local; | |
2708 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
2709 | struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data; | |
2710 | ||
2711 | lockdep_assert_held(&ifmgd->mtx); | |
2712 | ||
2713 | if (WARN_ON_ONCE(!auth_data)) | |
2714 | return -EINVAL; | |
2715 | ||
2716 | if (!auth_data->synced) { | |
2717 | int ret = drv_tx_sync(local, sdata, auth_data->bss->bssid, | |
2718 | IEEE80211_TX_SYNC_AUTH); | |
2719 | if (ret) | |
2720 | return ret; | |
2721 | } | |
2722 | auth_data->synced = true; | |
2723 | ||
2724 | auth_data->tries++; | |
2725 | ||
2726 | if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) { | |
2727 | printk(KERN_DEBUG "%s: authentication with %pM timed out\n", | |
2728 | sdata->name, auth_data->bss->bssid); | |
2729 | ||
2730 | /* | |
2731 | * Most likely AP is not in the range so remove the | |
2732 | * bss struct for that AP. | |
2733 | */ | |
2734 | cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss); | |
2735 | ||
2736 | return -ETIMEDOUT; | |
2737 | } | |
2738 | ||
2739 | if (auth_data->bss->proberesp_ies) { | |
2740 | printk(KERN_DEBUG "%s: send auth to %pM (try %d/%d)\n", | |
2741 | sdata->name, auth_data->bss->bssid, auth_data->tries, | |
2742 | IEEE80211_AUTH_MAX_TRIES); | |
2743 | ||
2744 | auth_data->expected_transaction = 2; | |
2745 | ieee80211_send_auth(sdata, 1, auth_data->algorithm, | |
2746 | auth_data->ie, auth_data->ie_len, | |
2747 | auth_data->bss->bssid, | |
2748 | auth_data->bss->bssid, NULL, 0, 0); | |
2749 | } else { | |
2750 | const u8 *ssidie; | |
2751 | ||
2752 | printk(KERN_DEBUG "%s: direct probe to %pM (try %d/%i)\n", | |
2753 | sdata->name, auth_data->bss->bssid, auth_data->tries, | |
2754 | IEEE80211_AUTH_MAX_TRIES); | |
2755 | ||
2756 | ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID); | |
2757 | if (!ssidie) | |
2758 | return -EINVAL; | |
2759 | /* | |
2760 | * Direct probe is sent to broadcast address as some APs | |
2761 | * will not answer to direct packet in unassociated state. | |
2762 | */ | |
2763 | ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1], | |
2764 | NULL, 0, (u32) -1, true, false); | |
2765 | } | |
2766 | ||
2767 | auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; | |
2768 | run_again(ifmgd, auth_data->timeout); | |
2769 | ||
2770 | return 0; | |
2771 | } | |
2772 | ||
2773 | static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata) | |
2774 | { | |
2775 | struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; | |
2776 | struct ieee80211_local *local = sdata->local; | |
2777 | ||
2778 | lockdep_assert_held(&sdata->u.mgd.mtx); | |
2779 | ||
2780 | if (!assoc_data->synced) { | |
2781 | int ret = drv_tx_sync(local, sdata, assoc_data->bss->bssid, | |
2782 | IEEE80211_TX_SYNC_ASSOC); | |
2783 | if (ret) | |
2784 | return ret; | |
2785 | } | |
2786 | assoc_data->synced = true; | |
2787 | ||
2788 | assoc_data->tries++; | |
2789 | if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) { | |
2790 | printk(KERN_DEBUG "%s: association with %pM timed out\n", | |
2791 | sdata->name, assoc_data->bss->bssid); | |
2792 | ||
2793 | /* | |
2794 | * Most likely AP is not in the range so remove the | |
2795 | * bss struct for that AP. | |
2796 | */ | |
2797 | cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss); | |
2798 | ||
2799 | return -ETIMEDOUT; | |
2800 | } | |
2801 | ||
2802 | printk(KERN_DEBUG "%s: associate with %pM (try %d/%d)\n", | |
2803 | sdata->name, assoc_data->bss->bssid, assoc_data->tries, | |
2804 | IEEE80211_ASSOC_MAX_TRIES); | |
2805 | ieee80211_send_assoc(sdata); | |
2806 | ||
2807 | assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; | |
2808 | run_again(&sdata->u.mgd, assoc_data->timeout); | |
2809 | ||
2810 | return 0; | |
2811 | } | |
2812 | ||
1fa57d01 | 2813 | void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) |
9c6bd790 | 2814 | { |
9c6bd790 | 2815 | struct ieee80211_local *local = sdata->local; |
1fa57d01 | 2816 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
9c6bd790 | 2817 | |
77fdaa12 JB |
2818 | mutex_lock(&ifmgd->mtx); |
2819 | ||
66e67e41 JB |
2820 | if (ifmgd->auth_data && |
2821 | time_after(jiffies, ifmgd->auth_data->timeout)) { | |
2822 | if (ifmgd->auth_data->done) { | |
2823 | /* | |
2824 | * ok ... we waited for assoc but userspace didn't, | |
2825 | * so let's just kill the auth data | |
2826 | */ | |
2827 | ieee80211_destroy_auth_data(sdata, false); | |
2828 | } else if (ieee80211_probe_auth(sdata)) { | |
2829 | u8 bssid[ETH_ALEN]; | |
2830 | ||
2831 | memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN); | |
2832 | ||
2833 | ieee80211_destroy_auth_data(sdata, false); | |
2834 | ||
2835 | mutex_unlock(&ifmgd->mtx); | |
2836 | cfg80211_send_auth_timeout(sdata->dev, bssid); | |
2837 | mutex_lock(&ifmgd->mtx); | |
2838 | } | |
2839 | } else if (ifmgd->auth_data) | |
2840 | run_again(ifmgd, ifmgd->auth_data->timeout); | |
2841 | ||
2842 | if (ifmgd->assoc_data && | |
2843 | time_after(jiffies, ifmgd->assoc_data->timeout)) { | |
2844 | if (!ifmgd->assoc_data->have_beacon || | |
2845 | ieee80211_do_assoc(sdata)) { | |
2846 | u8 bssid[ETH_ALEN]; | |
2847 | ||
2848 | memcpy(bssid, ifmgd->assoc_data->bss->bssid, ETH_ALEN); | |
2849 | ||
2850 | ieee80211_destroy_assoc_data(sdata, false); | |
2851 | ||
2852 | mutex_unlock(&ifmgd->mtx); | |
2853 | cfg80211_send_assoc_timeout(sdata->dev, bssid); | |
2854 | mutex_lock(&ifmgd->mtx); | |
2855 | } | |
2856 | } else if (ifmgd->assoc_data) | |
2857 | run_again(ifmgd, ifmgd->assoc_data->timeout); | |
2858 | ||
b291ba11 JB |
2859 | if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL | |
2860 | IEEE80211_STA_CONNECTION_POLL) && | |
2861 | ifmgd->associated) { | |
a43abf29 | 2862 | u8 bssid[ETH_ALEN]; |
72a8a3ed | 2863 | int max_tries; |
a43abf29 | 2864 | |
0c1ad2ca | 2865 | memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); |
4e5ff376 | 2866 | |
72a8a3ed | 2867 | if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) |
180205bd | 2868 | max_tries = max_nullfunc_tries; |
72a8a3ed | 2869 | else |
180205bd | 2870 | max_tries = max_probe_tries; |
72a8a3ed | 2871 | |
4e5ff376 FF |
2872 | /* ACK received for nullfunc probing frame */ |
2873 | if (!ifmgd->probe_send_count) | |
2874 | ieee80211_reset_ap_probe(sdata); | |
04ac3c0e FF |
2875 | else if (ifmgd->nullfunc_failed) { |
2876 | if (ifmgd->probe_send_count < max_tries) { | |
2877 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
2878 | wiphy_debug(local->hw.wiphy, | |
2879 | "%s: No ack for nullfunc frame to" | |
bfc31df3 | 2880 | " AP %pM, try %d/%i\n", |
04ac3c0e | 2881 | sdata->name, bssid, |
bfc31df3 | 2882 | ifmgd->probe_send_count, max_tries); |
04ac3c0e FF |
2883 | #endif |
2884 | ieee80211_mgd_probe_ap_send(sdata); | |
2885 | } else { | |
2886 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
2887 | wiphy_debug(local->hw.wiphy, | |
2888 | "%s: No ack for nullfunc frame to" | |
2889 | " AP %pM, disconnecting.\n", | |
c658e5db | 2890 | sdata->name, bssid); |
04ac3c0e | 2891 | #endif |
95acac61 JB |
2892 | ieee80211_sta_connection_lost(sdata, bssid, |
2893 | WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY); | |
04ac3c0e FF |
2894 | } |
2895 | } else if (time_is_after_jiffies(ifmgd->probe_timeout)) | |
b291ba11 | 2896 | run_again(ifmgd, ifmgd->probe_timeout); |
04ac3c0e FF |
2897 | else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) { |
2898 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
2899 | wiphy_debug(local->hw.wiphy, | |
2900 | "%s: Failed to send nullfunc to AP %pM" | |
2901 | " after %dms, disconnecting.\n", | |
2902 | sdata->name, | |
180205bd | 2903 | bssid, probe_wait_ms); |
04ac3c0e | 2904 | #endif |
95acac61 JB |
2905 | ieee80211_sta_connection_lost(sdata, bssid, |
2906 | WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY); | |
04ac3c0e | 2907 | } else if (ifmgd->probe_send_count < max_tries) { |
a43abf29 | 2908 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
b38afa87 BG |
2909 | wiphy_debug(local->hw.wiphy, |
2910 | "%s: No probe response from AP %pM" | |
bfc31df3 | 2911 | " after %dms, try %d/%i\n", |
b38afa87 | 2912 | sdata->name, |
180205bd | 2913 | bssid, probe_wait_ms, |
bfc31df3 | 2914 | ifmgd->probe_send_count, max_tries); |
a43abf29 ML |
2915 | #endif |
2916 | ieee80211_mgd_probe_ap_send(sdata); | |
2917 | } else { | |
b291ba11 JB |
2918 | /* |
2919 | * We actually lost the connection ... or did we? | |
2920 | * Let's make sure! | |
2921 | */ | |
b38afa87 BG |
2922 | wiphy_debug(local->hw.wiphy, |
2923 | "%s: No probe response from AP %pM" | |
2924 | " after %dms, disconnecting.\n", | |
2925 | sdata->name, | |
180205bd | 2926 | bssid, probe_wait_ms); |
04ac3c0e | 2927 | |
95acac61 JB |
2928 | ieee80211_sta_connection_lost(sdata, bssid, |
2929 | WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY); | |
b291ba11 JB |
2930 | } |
2931 | } | |
2932 | ||
77fdaa12 | 2933 | mutex_unlock(&ifmgd->mtx); |
66e67e41 JB |
2934 | |
2935 | mutex_lock(&local->mtx); | |
2936 | ieee80211_recalc_idle(local); | |
2937 | mutex_unlock(&local->mtx); | |
f0706e82 JB |
2938 | } |
2939 | ||
b291ba11 JB |
2940 | static void ieee80211_sta_bcn_mon_timer(unsigned long data) |
2941 | { | |
2942 | struct ieee80211_sub_if_data *sdata = | |
2943 | (struct ieee80211_sub_if_data *) data; | |
2944 | struct ieee80211_local *local = sdata->local; | |
2945 | ||
2946 | if (local->quiescing) | |
2947 | return; | |
2948 | ||
1e4dcd01 JO |
2949 | ieee80211_queue_work(&sdata->local->hw, |
2950 | &sdata->u.mgd.beacon_connection_loss_work); | |
b291ba11 JB |
2951 | } |
2952 | ||
2953 | static void ieee80211_sta_conn_mon_timer(unsigned long data) | |
2954 | { | |
2955 | struct ieee80211_sub_if_data *sdata = | |
2956 | (struct ieee80211_sub_if_data *) data; | |
2957 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
2958 | struct ieee80211_local *local = sdata->local; | |
2959 | ||
2960 | if (local->quiescing) | |
2961 | return; | |
2962 | ||
42935eca | 2963 | ieee80211_queue_work(&local->hw, &ifmgd->monitor_work); |
b291ba11 JB |
2964 | } |
2965 | ||
2966 | static void ieee80211_sta_monitor_work(struct work_struct *work) | |
2967 | { | |
2968 | struct ieee80211_sub_if_data *sdata = | |
2969 | container_of(work, struct ieee80211_sub_if_data, | |
2970 | u.mgd.monitor_work); | |
2971 | ||
2972 | ieee80211_mgd_probe_ap(sdata, false); | |
2973 | } | |
2974 | ||
9c6bd790 JB |
2975 | static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) |
2976 | { | |
ad935687 | 2977 | if (sdata->vif.type == NL80211_IFTYPE_STATION) { |
b291ba11 JB |
2978 | sdata->u.mgd.flags &= ~(IEEE80211_STA_BEACON_POLL | |
2979 | IEEE80211_STA_CONNECTION_POLL); | |
ad935687 | 2980 | |
b291ba11 | 2981 | /* let's probe the connection once */ |
42935eca | 2982 | ieee80211_queue_work(&sdata->local->hw, |
b291ba11 JB |
2983 | &sdata->u.mgd.monitor_work); |
2984 | /* and do all the other regular work too */ | |
64592c8f | 2985 | ieee80211_queue_work(&sdata->local->hw, &sdata->work); |
ad935687 | 2986 | } |
9c6bd790 | 2987 | } |
f0706e82 | 2988 | |
5bb644a0 JB |
2989 | #ifdef CONFIG_PM |
2990 | void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata) | |
2991 | { | |
2992 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
2993 | ||
2994 | /* | |
2995 | * we need to use atomic bitops for the running bits | |
2996 | * only because both timers might fire at the same | |
2997 | * time -- the code here is properly synchronised. | |
2998 | */ | |
2999 | ||
d1f5b7a3 JB |
3000 | cancel_work_sync(&ifmgd->request_smps_work); |
3001 | ||
0ecfe806 | 3002 | cancel_work_sync(&ifmgd->monitor_work); |
1e4dcd01 | 3003 | cancel_work_sync(&ifmgd->beacon_connection_loss_work); |
5bb644a0 JB |
3004 | if (del_timer_sync(&ifmgd->timer)) |
3005 | set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running); | |
3006 | ||
3007 | cancel_work_sync(&ifmgd->chswitch_work); | |
3008 | if (del_timer_sync(&ifmgd->chswitch_timer)) | |
3009 | set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running); | |
b291ba11 | 3010 | |
b291ba11 JB |
3011 | /* these will just be re-established on connection */ |
3012 | del_timer_sync(&ifmgd->conn_mon_timer); | |
3013 | del_timer_sync(&ifmgd->bcn_mon_timer); | |
5bb644a0 JB |
3014 | } |
3015 | ||
3016 | void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) | |
3017 | { | |
3018 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
3019 | ||
676b58c2 RM |
3020 | if (!ifmgd->associated) |
3021 | return; | |
3022 | ||
95acac61 JB |
3023 | if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) { |
3024 | sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME; | |
3025 | mutex_lock(&ifmgd->mtx); | |
3026 | if (ifmgd->associated) { | |
3027 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
3028 | wiphy_debug(sdata->local->hw.wiphy, | |
3029 | "%s: driver requested disconnect after resume.\n", | |
3030 | sdata->name); | |
3031 | #endif | |
3032 | ieee80211_sta_connection_lost(sdata, | |
3033 | ifmgd->associated->bssid, | |
3034 | WLAN_REASON_UNSPECIFIED); | |
3035 | mutex_unlock(&ifmgd->mtx); | |
3036 | return; | |
3037 | } | |
3038 | mutex_unlock(&ifmgd->mtx); | |
3039 | } | |
3040 | ||
5bb644a0 JB |
3041 | if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running)) |
3042 | add_timer(&ifmgd->timer); | |
3043 | if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running)) | |
3044 | add_timer(&ifmgd->chswitch_timer); | |
c8a7972c | 3045 | ieee80211_sta_reset_beacon_monitor(sdata); |
46090979 | 3046 | ieee80211_restart_sta_timer(sdata); |
a6af1d84 | 3047 | ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.monitor_work); |
5bb644a0 JB |
3048 | } |
3049 | #endif | |
3050 | ||
9c6bd790 JB |
3051 | /* interface setup */ |
3052 | void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) | |
f0706e82 | 3053 | { |
46900298 | 3054 | struct ieee80211_if_managed *ifmgd; |
988c0f72 | 3055 | |
46900298 | 3056 | ifmgd = &sdata->u.mgd; |
b291ba11 | 3057 | INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work); |
46900298 | 3058 | INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work); |
1e4dcd01 JO |
3059 | INIT_WORK(&ifmgd->beacon_connection_loss_work, |
3060 | ieee80211_beacon_connection_loss_work); | |
d1f5b7a3 | 3061 | INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work); |
46900298 | 3062 | setup_timer(&ifmgd->timer, ieee80211_sta_timer, |
c481ec97 | 3063 | (unsigned long) sdata); |
b291ba11 JB |
3064 | setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, |
3065 | (unsigned long) sdata); | |
3066 | setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, | |
3067 | (unsigned long) sdata); | |
46900298 | 3068 | setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, |
9c6bd790 | 3069 | (unsigned long) sdata); |
9c6bd790 | 3070 | |
ab1faead | 3071 | ifmgd->flags = 0; |
1478acb3 | 3072 | ifmgd->powersave = sdata->wdev.ps; |
bbbdff9e | 3073 | |
77fdaa12 | 3074 | mutex_init(&ifmgd->mtx); |
0f78231b JB |
3075 | |
3076 | if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS) | |
3077 | ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC; | |
3078 | else | |
3079 | ifmgd->req_smps = IEEE80211_SMPS_OFF; | |
f0706e82 JB |
3080 | } |
3081 | ||
77fdaa12 JB |
3082 | /* scan finished notification */ |
3083 | void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) | |
60f8b39c | 3084 | { |
77fdaa12 | 3085 | struct ieee80211_sub_if_data *sdata = local->scan_sdata; |
60f8b39c | 3086 | |
77fdaa12 JB |
3087 | /* Restart STA timers */ |
3088 | rcu_read_lock(); | |
3089 | list_for_each_entry_rcu(sdata, &local->interfaces, list) | |
3090 | ieee80211_restart_sta_timer(sdata); | |
3091 | rcu_read_unlock(); | |
3092 | } | |
60f8b39c | 3093 | |
77fdaa12 JB |
3094 | int ieee80211_max_network_latency(struct notifier_block *nb, |
3095 | unsigned long data, void *dummy) | |
3096 | { | |
3097 | s32 latency_usec = (s32) data; | |
3098 | struct ieee80211_local *local = | |
3099 | container_of(nb, struct ieee80211_local, | |
3100 | network_latency_notifier); | |
1fa6f4af | 3101 | |
77fdaa12 JB |
3102 | mutex_lock(&local->iflist_mtx); |
3103 | ieee80211_recalc_ps(local, latency_usec); | |
3104 | mutex_unlock(&local->iflist_mtx); | |
dfe67012 | 3105 | |
77fdaa12 | 3106 | return 0; |
9c6bd790 JB |
3107 | } |
3108 | ||
77fdaa12 JB |
3109 | /* config hooks */ |
3110 | int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, | |
3111 | struct cfg80211_auth_request *req) | |
9c6bd790 | 3112 | { |
66e67e41 JB |
3113 | struct ieee80211_local *local = sdata->local; |
3114 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
3115 | struct ieee80211_mgd_auth_data *auth_data; | |
3116 | struct sta_info *sta; | |
77fdaa12 | 3117 | u16 auth_alg; |
66e67e41 JB |
3118 | int err; |
3119 | ||
3120 | /* prepare auth data structure */ | |
9c6bd790 | 3121 | |
77fdaa12 JB |
3122 | switch (req->auth_type) { |
3123 | case NL80211_AUTHTYPE_OPEN_SYSTEM: | |
3124 | auth_alg = WLAN_AUTH_OPEN; | |
3125 | break; | |
3126 | case NL80211_AUTHTYPE_SHARED_KEY: | |
66e67e41 | 3127 | if (IS_ERR(local->wep_tx_tfm)) |
9dca9c49 | 3128 | return -EOPNOTSUPP; |
77fdaa12 JB |
3129 | auth_alg = WLAN_AUTH_SHARED_KEY; |
3130 | break; | |
3131 | case NL80211_AUTHTYPE_FT: | |
3132 | auth_alg = WLAN_AUTH_FT; | |
3133 | break; | |
3134 | case NL80211_AUTHTYPE_NETWORK_EAP: | |
3135 | auth_alg = WLAN_AUTH_LEAP; | |
3136 | break; | |
3137 | default: | |
3138 | return -EOPNOTSUPP; | |
60f8b39c | 3139 | } |
77fdaa12 | 3140 | |
66e67e41 JB |
3141 | auth_data = kzalloc(sizeof(*auth_data) + req->ie_len, GFP_KERNEL); |
3142 | if (!auth_data) | |
9c6bd790 | 3143 | return -ENOMEM; |
77fdaa12 | 3144 | |
66e67e41 | 3145 | auth_data->bss = req->bss; |
77fdaa12 JB |
3146 | |
3147 | if (req->ie && req->ie_len) { | |
66e67e41 JB |
3148 | memcpy(auth_data->ie, req->ie, req->ie_len); |
3149 | auth_data->ie_len = req->ie_len; | |
9c6bd790 | 3150 | } |
77fdaa12 | 3151 | |
fffd0934 | 3152 | if (req->key && req->key_len) { |
66e67e41 JB |
3153 | auth_data->key_len = req->key_len; |
3154 | auth_data->key_idx = req->key_idx; | |
3155 | memcpy(auth_data->key, req->key, req->key_len); | |
fffd0934 JB |
3156 | } |
3157 | ||
66e67e41 | 3158 | auth_data->algorithm = auth_alg; |
60f8b39c | 3159 | |
66e67e41 | 3160 | /* try to authenticate/probe */ |
2a33bee2 | 3161 | |
66e67e41 | 3162 | mutex_lock(&ifmgd->mtx); |
2a33bee2 | 3163 | |
66e67e41 JB |
3164 | if ((ifmgd->auth_data && !ifmgd->auth_data->done) || |
3165 | ifmgd->assoc_data) { | |
3166 | err = -EBUSY; | |
3167 | goto err_free; | |
2a33bee2 GE |
3168 | } |
3169 | ||
66e67e41 JB |
3170 | if (ifmgd->auth_data) |
3171 | ieee80211_destroy_auth_data(sdata, false); | |
2a33bee2 | 3172 | |
66e67e41 JB |
3173 | /* prep auth_data so we don't go into idle on disassoc */ |
3174 | ifmgd->auth_data = auth_data; | |
af6b6374 | 3175 | |
66e67e41 JB |
3176 | if (ifmgd->associated) |
3177 | ieee80211_set_disassoc(sdata, true, false); | |
af6b6374 | 3178 | |
66e67e41 JB |
3179 | printk(KERN_DEBUG "%s: authenticate with %pM\n", |
3180 | sdata->name, req->bss->bssid); | |
e5b900d2 | 3181 | |
66e67e41 JB |
3182 | mutex_lock(&local->mtx); |
3183 | ieee80211_recalc_idle(sdata->local); | |
3184 | mutex_unlock(&local->mtx); | |
e5b900d2 | 3185 | |
66e67e41 JB |
3186 | /* switch to the right channel */ |
3187 | local->oper_channel = req->bss->channel; | |
3188 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL); | |
af6b6374 | 3189 | |
66e67e41 JB |
3190 | /* set BSSID */ |
3191 | memcpy(ifmgd->bssid, req->bss->bssid, ETH_ALEN); | |
3192 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); | |
b2abb6e2 | 3193 | |
66e67e41 JB |
3194 | /* add station entry */ |
3195 | sta = sta_info_alloc(sdata, req->bss->bssid, GFP_KERNEL); | |
3196 | if (!sta) { | |
3197 | err = -ENOMEM; | |
3198 | goto err_clear; | |
3199 | } | |
68542962 | 3200 | |
66e67e41 JB |
3201 | err = sta_info_insert(sta); |
3202 | if (err) { | |
3203 | printk(KERN_DEBUG | |
3204 | "%s: failed to insert STA entry for the AP %pM (error %d)\n", | |
3205 | sdata->name, req->bss->bssid, err); | |
3206 | goto err_clear; | |
af6b6374 JB |
3207 | } |
3208 | ||
66e67e41 JB |
3209 | err = ieee80211_probe_auth(sdata); |
3210 | if (err) { | |
3211 | if (auth_data->synced) | |
3212 | drv_finish_tx_sync(local, sdata, req->bss->bssid, | |
3213 | IEEE80211_TX_SYNC_AUTH); | |
3214 | sta_info_destroy_addr(sdata, req->bss->bssid); | |
3215 | goto err_clear; | |
3216 | } | |
3217 | ||
3218 | /* hold our own reference */ | |
3219 | cfg80211_ref_bss(auth_data->bss); | |
3220 | err = 0; | |
3221 | goto out_unlock; | |
3222 | ||
3223 | err_clear: | |
3224 | ifmgd->auth_data = NULL; | |
3225 | err_free: | |
3226 | kfree(auth_data); | |
3227 | out_unlock: | |
3228 | mutex_unlock(&ifmgd->mtx); | |
b2abb6e2 | 3229 | |
66e67e41 | 3230 | return err; |
af6b6374 JB |
3231 | } |
3232 | ||
77fdaa12 JB |
3233 | int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, |
3234 | struct cfg80211_assoc_request *req) | |
f0706e82 | 3235 | { |
66e67e41 | 3236 | struct ieee80211_local *local = sdata->local; |
77fdaa12 | 3237 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
0c1ad2ca | 3238 | struct ieee80211_bss *bss = (void *)req->bss->priv; |
66e67e41 JB |
3239 | struct ieee80211_mgd_assoc_data *assoc_data; |
3240 | struct sta_info *sta; | |
3241 | const u8 *ssidie; | |
2a33bee2 | 3242 | int i, err; |
f0706e82 | 3243 | |
66e67e41 JB |
3244 | ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID); |
3245 | if (!ssidie) | |
3246 | return -EINVAL; | |
3247 | ||
3248 | assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL); | |
3249 | if (!assoc_data) | |
3250 | return -ENOMEM; | |
3251 | ||
77fdaa12 | 3252 | mutex_lock(&ifmgd->mtx); |
9c87ba67 | 3253 | |
66e67e41 | 3254 | if (ifmgd->associated) |
53f73c09 | 3255 | ieee80211_set_disassoc(sdata, true, false); |
66e67e41 JB |
3256 | |
3257 | if (ifmgd->auth_data && !ifmgd->auth_data->done) { | |
3258 | err = -EBUSY; | |
3259 | goto err_free; | |
af6b6374 | 3260 | } |
77fdaa12 | 3261 | |
66e67e41 JB |
3262 | if (ifmgd->assoc_data) { |
3263 | err = -EBUSY; | |
3264 | goto err_free; | |
3265 | } | |
77fdaa12 | 3266 | |
66e67e41 JB |
3267 | if (ifmgd->auth_data) { |
3268 | bool match; | |
3269 | ||
3270 | /* keep sta info, bssid if matching */ | |
3271 | match = memcmp(ifmgd->bssid, req->bss->bssid, ETH_ALEN) == 0; | |
3272 | ieee80211_destroy_auth_data(sdata, match); | |
2a33bee2 GE |
3273 | } |
3274 | ||
66e67e41 JB |
3275 | /* prepare assoc data */ |
3276 | ||
77fdaa12 | 3277 | ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N; |
375177bf | 3278 | ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; |
77fdaa12 | 3279 | |
d8ec4433 JO |
3280 | ifmgd->beacon_crc_valid = false; |
3281 | ||
77fdaa12 JB |
3282 | for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) |
3283 | if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || | |
3284 | req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || | |
3285 | req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) | |
3286 | ifmgd->flags |= IEEE80211_STA_DISABLE_11N; | |
3287 | ||
ef96a842 BG |
3288 | if (req->flags & ASSOC_REQ_DISABLE_HT) |
3289 | ifmgd->flags |= IEEE80211_STA_DISABLE_11N; | |
3290 | ||
3291 | memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); | |
3292 | memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask, | |
3293 | sizeof(ifmgd->ht_capa_mask)); | |
3294 | ||
77fdaa12 | 3295 | if (req->ie && req->ie_len) { |
66e67e41 JB |
3296 | memcpy(assoc_data->ie, req->ie, req->ie_len); |
3297 | assoc_data->ie_len = req->ie_len; | |
3298 | } | |
f679f65d | 3299 | |
66e67e41 | 3300 | assoc_data->bss = req->bss; |
f679f65d | 3301 | |
af6b6374 JB |
3302 | if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) { |
3303 | if (ifmgd->powersave) | |
3304 | ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC; | |
3305 | else | |
3306 | ifmgd->ap_smps = IEEE80211_SMPS_OFF; | |
3307 | } else | |
3308 | ifmgd->ap_smps = ifmgd->req_smps; | |
3309 | ||
77c8144a JB |
3310 | /* |
3311 | * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode. | |
3312 | * We still associate in non-HT mode (11a/b/g) if any one of these | |
3313 | * ciphers is configured as pairwise. | |
3314 | * We can set this to true for non-11n hardware, that'll be checked | |
3315 | * separately along with the peer capabilities. | |
3316 | */ | |
66e67e41 JB |
3317 | assoc_data->capability = req->bss->capability; |
3318 | assoc_data->wmm_used = bss->wmm_used; | |
3319 | assoc_data->supp_rates = bss->supp_rates; | |
3320 | assoc_data->supp_rates_len = bss->supp_rates_len; | |
3321 | assoc_data->ht_information_ie = | |
f679f65d | 3322 | ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_INFORMATION); |
63f170e0 | 3323 | |
ab13315a KV |
3324 | if (bss->wmm_used && bss->uapsd_supported && |
3325 | (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) { | |
66e67e41 | 3326 | assoc_data->uapsd_used = true; |
ab13315a KV |
3327 | ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; |
3328 | } else { | |
66e67e41 | 3329 | assoc_data->uapsd_used = false; |
ab13315a KV |
3330 | ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; |
3331 | } | |
3332 | ||
66e67e41 JB |
3333 | memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]); |
3334 | assoc_data->ssid_len = ssidie[1]; | |
63f170e0 | 3335 | |
77fdaa12 | 3336 | if (req->prev_bssid) |
66e67e41 | 3337 | memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN); |
77fdaa12 JB |
3338 | |
3339 | if (req->use_mfp) { | |
3340 | ifmgd->mfp = IEEE80211_MFP_REQUIRED; | |
3341 | ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; | |
3342 | } else { | |
3343 | ifmgd->mfp = IEEE80211_MFP_DISABLED; | |
3344 | ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; | |
3345 | } | |
3346 | ||
3347 | if (req->crypto.control_port) | |
3348 | ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; | |
3349 | else | |
3350 | ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; | |
3351 | ||
a621fa4d JB |
3352 | sdata->control_port_protocol = req->crypto.control_port_ethertype; |
3353 | sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt; | |
3354 | ||
66e67e41 JB |
3355 | /* kick off associate process */ |
3356 | ||
3357 | ifmgd->assoc_data = assoc_data; | |
3358 | ||
3359 | mutex_lock(&local->mtx); | |
3360 | ieee80211_recalc_idle(sdata->local); | |
3361 | mutex_unlock(&local->mtx); | |
3362 | ||
3363 | /* switch to the right channel */ | |
3364 | local->oper_channel = req->bss->channel; | |
3365 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL); | |
3366 | ||
3367 | rcu_read_lock(); | |
3368 | sta = sta_info_get(sdata, req->bss->bssid); | |
3369 | rcu_read_unlock(); | |
3370 | ||
3371 | if (!sta) { | |
3372 | /* set BSSID */ | |
3373 | memcpy(ifmgd->bssid, req->bss->bssid, ETH_ALEN); | |
3374 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); | |
3375 | ||
3376 | sta = sta_info_alloc(sdata, req->bss->bssid, GFP_KERNEL); | |
3377 | if (!sta) { | |
3378 | err = -ENOMEM; | |
3379 | goto err_clear; | |
3380 | } | |
3381 | ||
3382 | sta_info_pre_move_state(sta, IEEE80211_STA_AUTH); | |
3383 | ||
3384 | err = sta_info_insert(sta); | |
3385 | sta = NULL; | |
3386 | if (err) { | |
3387 | printk(KERN_DEBUG | |
3388 | "%s: failed to insert STA entry for the AP (error %d)\n", | |
3389 | sdata->name, err); | |
3390 | goto err_clear; | |
3391 | } | |
3392 | } else | |
3393 | WARN_ON_ONCE(memcmp(ifmgd->bssid, req->bss->bssid, ETH_ALEN)); | |
3394 | ||
3395 | if (!bss->dtim_period && | |
3396 | sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD) { | |
3397 | /* | |
3398 | * Wait up to one beacon interval ... | |
3399 | * should this be more if we miss one? | |
3400 | */ | |
3401 | printk(KERN_DEBUG "%s: waiting for beacon from %pM\n", | |
3402 | sdata->name, ifmgd->bssid); | |
3403 | assoc_data->timeout = jiffies + | |
3404 | TU_TO_EXP_TIME(req->bss->beacon_interval); | |
3405 | } else { | |
3406 | assoc_data->have_beacon = true; | |
3407 | assoc_data->sent_assoc = false; | |
3408 | assoc_data->timeout = jiffies; | |
3409 | } | |
3410 | run_again(ifmgd, assoc_data->timeout); | |
3411 | ||
3412 | err = 0; | |
3413 | goto out; | |
3414 | err_clear: | |
3415 | ifmgd->assoc_data = NULL; | |
3416 | err_free: | |
3417 | kfree(assoc_data); | |
3418 | out: | |
3419 | mutex_unlock(&ifmgd->mtx); | |
3420 | ||
3421 | return err; | |
f0706e82 JB |
3422 | } |
3423 | ||
77fdaa12 | 3424 | int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, |
667503dd JB |
3425 | struct cfg80211_deauth_request *req, |
3426 | void *cookie) | |
f0706e82 | 3427 | { |
46900298 | 3428 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
05e48e8e | 3429 | bool assoc_bss = false; |
f0706e82 | 3430 | |
77fdaa12 JB |
3431 | mutex_lock(&ifmgd->mtx); |
3432 | ||
95de817b JB |
3433 | if (ifmgd->associated && |
3434 | memcmp(ifmgd->associated->bssid, req->bssid, ETH_ALEN) == 0) { | |
53f73c09 | 3435 | ieee80211_set_disassoc(sdata, false, true); |
05e48e8e | 3436 | assoc_bss = true; |
66e67e41 JB |
3437 | } else if (ifmgd->auth_data) { |
3438 | ieee80211_destroy_auth_data(sdata, false); | |
a58ce43f | 3439 | mutex_unlock(&ifmgd->mtx); |
66e67e41 | 3440 | return 0; |
af6b6374 | 3441 | } |
66e67e41 | 3442 | mutex_unlock(&ifmgd->mtx); |
77fdaa12 | 3443 | |
0ff71613 | 3444 | printk(KERN_DEBUG "%s: deauthenticating from %pM by local choice (reason=%d)\n", |
95de817b | 3445 | sdata->name, req->bssid, req->reason_code); |
0ff71613 | 3446 | |
95de817b JB |
3447 | ieee80211_send_deauth_disassoc(sdata, req->bssid, IEEE80211_STYPE_DEAUTH, |
3448 | req->reason_code, cookie, true); | |
05e48e8e | 3449 | if (assoc_bss) |
07ba55d7 | 3450 | sta_info_flush(sdata->local, sdata); |
f0706e82 | 3451 | |
7da7cc1d | 3452 | mutex_lock(&sdata->local->mtx); |
bc83b681 | 3453 | ieee80211_recalc_idle(sdata->local); |
7da7cc1d | 3454 | mutex_unlock(&sdata->local->mtx); |
bc83b681 | 3455 | |
f0706e82 JB |
3456 | return 0; |
3457 | } | |
84363e6e | 3458 | |
77fdaa12 | 3459 | int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, |
667503dd JB |
3460 | struct cfg80211_disassoc_request *req, |
3461 | void *cookie) | |
9c6bd790 | 3462 | { |
77fdaa12 | 3463 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
e69e95db | 3464 | u8 bssid[ETH_ALEN]; |
9c6bd790 | 3465 | |
77fdaa12 | 3466 | mutex_lock(&ifmgd->mtx); |
10f644a4 | 3467 | |
8d8b261a JB |
3468 | /* |
3469 | * cfg80211 should catch this ... but it's racy since | |
3470 | * we can receive a disassoc frame, process it, hand it | |
3471 | * to cfg80211 while that's in a locked section already | |
3472 | * trying to tell us that the user wants to disconnect. | |
3473 | */ | |
0c1ad2ca | 3474 | if (ifmgd->associated != req->bss) { |
77fdaa12 JB |
3475 | mutex_unlock(&ifmgd->mtx); |
3476 | return -ENOLINK; | |
3477 | } | |
3478 | ||
0ff71613 | 3479 | printk(KERN_DEBUG "%s: disassociating from %pM by local choice (reason=%d)\n", |
47846c9b | 3480 | sdata->name, req->bss->bssid, req->reason_code); |
0ff71613 | 3481 | |
e69e95db | 3482 | memcpy(bssid, req->bss->bssid, ETH_ALEN); |
53f73c09 | 3483 | ieee80211_set_disassoc(sdata, false, true); |
77fdaa12 JB |
3484 | |
3485 | mutex_unlock(&ifmgd->mtx); | |
10f644a4 | 3486 | |
77fdaa12 | 3487 | ieee80211_send_deauth_disassoc(sdata, req->bss->bssid, |
667503dd | 3488 | IEEE80211_STYPE_DISASSOC, req->reason_code, |
d5cdfacb | 3489 | cookie, !req->local_state_change); |
07ba55d7 | 3490 | sta_info_flush(sdata->local, sdata); |
bc83b681 | 3491 | |
7da7cc1d | 3492 | mutex_lock(&sdata->local->mtx); |
bc83b681 | 3493 | ieee80211_recalc_idle(sdata->local); |
7da7cc1d | 3494 | mutex_unlock(&sdata->local->mtx); |
bc83b681 | 3495 | |
10f644a4 JB |
3496 | return 0; |
3497 | } | |
026331c4 | 3498 | |
a97c13c3 JO |
3499 | void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, |
3500 | enum nl80211_cqm_rssi_threshold_event rssi_event, | |
3501 | gfp_t gfp) | |
3502 | { | |
3503 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
3504 | ||
b5878a2d JB |
3505 | trace_api_cqm_rssi_notify(sdata, rssi_event); |
3506 | ||
a97c13c3 JO |
3507 | cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp); |
3508 | } | |
3509 | EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); | |
1d34d108 EP |
3510 | |
3511 | unsigned char ieee80211_get_operstate(struct ieee80211_vif *vif) | |
3512 | { | |
3513 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
3514 | return sdata->dev->operstate; | |
3515 | } | |
3516 | EXPORT_SYMBOL(ieee80211_get_operstate); |