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mac80211: use the correct capability info in ieee80211_set_associated()
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / net / mac80211 / mlme.c
CommitLineData
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		 39static int max_nullfunc_tries = 2;
40module_param(max_nullfunc_tries, int, 0644);
41MODULE_PARM_DESC(max_nullfunc_tries,
42 "Maximum nullfunc tx tries before disconnecting (reason 4).");
43
44static int max_probe_tries = 5;
45module_param(max_probe_tries, int, 0644);
46MODULE_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		 69static int probe_wait_ms = 500;
70module_param(probe_wait_ms, int, 0644);
71MODULE_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
5fef7dbc
JB		 91#define DEAUTH_DISASSOC_LEN (24 /* hdr */ + 2 /* reason */)
92
77fdaa12
JB		 93/*
94 * All cfg80211 functions have to be called outside a locked
95 * section so that they can acquire a lock themselves... This
96 * is much simpler than queuing up things in cfg80211, but we
97 * do need some indirection for that here.
98 */
99enum rx_mgmt_action {
100 /* no action required */
101 RX_MGMT_NONE,
102
77fdaa12
JB		 103 /* caller must call cfg80211_send_deauth() */
104 RX_MGMT_CFG80211_DEAUTH,
105
106 /* caller must call cfg80211_send_disassoc() */
107 RX_MGMT_CFG80211_DISASSOC,
66e67e41
JB		 108
109 /* caller must call cfg80211_send_rx_auth() */
110 RX_MGMT_CFG80211_RX_AUTH,
111
112 /* caller must call cfg80211_send_rx_assoc() */
113 RX_MGMT_CFG80211_RX_ASSOC,
114
115 /* caller must call cfg80211_send_assoc_timeout() */
116 RX_MGMT_CFG80211_ASSOC_TIMEOUT,
77fdaa12
JB		 117};
118
5484e237 119/* utils */
77fdaa12
JB		 120static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd)
121{
46a5ebaf 122 lockdep_assert_held(&ifmgd->mtx);
77fdaa12
JB		 123}
124
ca386f31
JB		 125/*
126 * We can have multiple work items (and connection probing)
127 * scheduling this timer, but we need to take care to only
128 * reschedule it when it should fire _earlier_ than it was
129 * asked for before, or if it's not pending right now. This
130 * function ensures that. Note that it then is required to
131 * run this function for all timeouts after the first one
132 * has happened -- the work that runs from this timer will
133 * do that.
134 */
66e67e41 135static void run_again(struct ieee80211_if_managed *ifmgd, unsigned long timeout)
ca386f31
JB		 136{
137 ASSERT_MGD_MTX(ifmgd);
138
139 if (!timer_pending(&ifmgd->timer) ||
140 time_before(timeout, ifmgd->timer.expires))
141 mod_timer(&ifmgd->timer, timeout);
142}
143
d3a910a8 144void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
b291ba11 145{
c1288b12 146 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
b291ba11
JB		 147 return;
148
149 mod_timer(&sdata->u.mgd.bcn_mon_timer,
7ccc8bd7 150 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
b291ba11
JB		 151}
152
be099e82
LR		 153void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
154{
0c699c3a
LR		 155 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
156
8628172f
SG		 157 if (unlikely(!sdata->u.mgd.associated))
158 return;
159
be099e82
LR		 160 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
161 return;
162
163 mod_timer(&sdata->u.mgd.conn_mon_timer,
164 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
0c699c3a
LR		 165
166 ifmgd->probe_send_count = 0;
be099e82
LR		 167}
168
5484e237 169static int ecw2cw(int ecw)
60f8b39c 170{
5484e237 171 return (1 << ecw) - 1;
60f8b39c
JB		 172}
173
24398e39
JB		 174static u32 ieee80211_config_ht_tx(struct ieee80211_sub_if_data *sdata,
175 struct ieee80211_ht_operation *ht_oper,
176 const u8 *bssid, bool reconfig)
d5522e03
JB		 177{
178 struct ieee80211_local *local = sdata->local;
179 struct ieee80211_supported_band *sband;
d5522e03
JB		 180 struct sta_info *sta;
181 u32 changed = 0;
9ed6bcce 182 u16 ht_opmode;
64f68e5d 183 bool disable_40 = false;
d5522e03
JB		 184
185 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
d5522e03 186
64f68e5d
JB		 187 switch (sdata->vif.bss_conf.channel_type) {
188 case NL80211_CHAN_HT40PLUS:
189 if (local->hw.conf.channel->flags & IEEE80211_CHAN_NO_HT40PLUS)
190 disable_40 = true;
191 break;
192 case NL80211_CHAN_HT40MINUS:
193 if (local->hw.conf.channel->flags & IEEE80211_CHAN_NO_HT40MINUS)
194 disable_40 = true;
195 break;
196 default:
197 break;
198 }
d5522e03 199
24398e39
JB		 200 /* This can change during the lifetime of the BSS */
201 if (!(ht_oper->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY))
64f68e5d
JB		 202 disable_40 = true;
203
204 mutex_lock(&local->sta_mtx);
205 sta = sta_info_get(sdata, bssid);
d5522e03 206
64f68e5d
JB		 207 WARN_ON_ONCE(!sta);
208
209 if (sta && !sta->supports_40mhz)
210 disable_40 = true;
211
212 if (sta && (!reconfig ||
91a0099c 213 (disable_40 != !(sta->sta.ht_cap.cap &
64f68e5d 214 IEEE80211_HT_CAP_SUP_WIDTH_20_40)))) {
d5522e03 215
64f68e5d
JB		 216 if (disable_40)
217 sta->sta.ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
218 else
219 sta->sta.ht_cap.cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
7cc44ed4 220
64f68e5d 221 rate_control_rate_update(local, sband, sta,
8f727ef3 222 IEEE80211_RC_BW_CHANGED);
0aaffa9b 223 }
64f68e5d 224 mutex_unlock(&local->sta_mtx);
d5522e03 225
074d46d1 226 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
d5522e03
JB		 227
228 /* if bss configuration changed store the new one */
24398e39 229 if (!reconfig || (sdata->vif.bss_conf.ht_operation_mode != ht_opmode)) {
d5522e03 230 changed |= BSS_CHANGED_HT;
9ed6bcce 231 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
d5522e03
JB		 232 }
233
234 return changed;
235}
236
9c6bd790
JB		 237/* frame sending functions */
238
66e67e41
JB		 239static int ieee80211_compatible_rates(const u8 *supp_rates, int supp_rates_len,
240 struct ieee80211_supported_band *sband,
241 u32 *rates)
242{
243 int i, j, count;
244 *rates = 0;
245 count = 0;
246 for (i = 0; i < supp_rates_len; i++) {
247 int rate = (supp_rates[i] & 0x7F) * 5;
248
249 for (j = 0; j < sband->n_bitrates; j++)
250 if (sband->bitrates[j].bitrate == rate) {
251 *rates |= BIT(j);
252 count++;
253 break;
254 }
255 }
256
257 return count;
258}
259
260static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
9dde6423 261 struct sk_buff *skb, u8 ap_ht_param,
66e67e41
JB		 262 struct ieee80211_supported_band *sband,
263 struct ieee80211_channel *channel,
264 enum ieee80211_smps_mode smps)
265{
66e67e41
JB		 266 u8 *pos;
267 u32 flags = channel->flags;
268 u16 cap;
269 struct ieee80211_sta_ht_cap ht_cap;
270
271 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
272
66e67e41
JB		 273 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
274 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
275
66e67e41
JB		 276 /* determine capability flags */
277 cap = ht_cap.cap;
278
9dde6423 279 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
66e67e41
JB		 280 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
281 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
282 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
283 cap &= ~IEEE80211_HT_CAP_SGI_40;
284 }
285 break;
286 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
287 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
288 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
289 cap &= ~IEEE80211_HT_CAP_SGI_40;
290 }
291 break;
292 }
293
24398e39
JB		 294 /*
295 * If 40 MHz was disabled associate as though we weren't
296 * capable of 40 MHz -- some broken APs will never fall
297 * back to trying to transmit in 20 MHz.
298 */
299 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
300 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
301 cap &= ~IEEE80211_HT_CAP_SGI_40;
302 }
303
66e67e41
JB		 304 /* set SM PS mode properly */
305 cap &= ~IEEE80211_HT_CAP_SM_PS;
306 switch (smps) {
307 case IEEE80211_SMPS_AUTOMATIC:
308 case IEEE80211_SMPS_NUM_MODES:
309 WARN_ON(1);
310 case IEEE80211_SMPS_OFF:
311 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
312 IEEE80211_HT_CAP_SM_PS_SHIFT;
313 break;
314 case IEEE80211_SMPS_STATIC:
315 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
316 IEEE80211_HT_CAP_SM_PS_SHIFT;
317 break;
318 case IEEE80211_SMPS_DYNAMIC:
319 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
320 IEEE80211_HT_CAP_SM_PS_SHIFT;
321 break;
322 }
323
324 /* reserve and fill IE */
325 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
326 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
327}
328
329static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
330{
331 struct ieee80211_local *local = sdata->local;
332 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
333 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
334 struct sk_buff *skb;
335 struct ieee80211_mgmt *mgmt;
336 u8 *pos, qos_info;
337 size_t offset = 0, noffset;
338 int i, count, rates_len, supp_rates_len;
339 u16 capab;
340 struct ieee80211_supported_band *sband;
341 u32 rates = 0;
66e67e41
JB		 342
343 lockdep_assert_held(&ifmgd->mtx);
344
345 sband = local->hw.wiphy->bands[local->oper_channel->band];
346
347 if (assoc_data->supp_rates_len) {
348 /*
349 * Get all rates supported by the device and the AP as
350 * some APs don't like getting a superset of their rates
351 * in the association request (e.g. D-Link DAP 1353 in
352 * b-only mode)...
353 */
354 rates_len = ieee80211_compatible_rates(assoc_data->supp_rates,
355 assoc_data->supp_rates_len,
356 sband, &rates);
357 } else {
358 /*
359 * In case AP not provide any supported rates information
360 * before association, we send information element(s) with
361 * all rates that we support.
362 */
363 rates = ~0;
364 rates_len = sband->n_bitrates;
365 }
366
367 skb = alloc_skb(local->hw.extra_tx_headroom +
368 sizeof(*mgmt) + /* bit too much but doesn't matter */
369 2 + assoc_data->ssid_len + /* SSID */
370 4 + rates_len + /* (extended) rates */
371 4 + /* power capability */
372 2 + 2 * sband->n_channels + /* supported channels */
373 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
374 assoc_data->ie_len + /* extra IEs */
375 9, /* WMM */
376 GFP_KERNEL);
377 if (!skb)
378 return;
379
380 skb_reserve(skb, local->hw.extra_tx_headroom);
381
382 capab = WLAN_CAPABILITY_ESS;
383
384 if (sband->band == IEEE80211_BAND_2GHZ) {
385 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
386 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
387 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
388 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
389 }
390
391 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
392 capab |= WLAN_CAPABILITY_PRIVACY;
393
394 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
395 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
396 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
397
398 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
399 memset(mgmt, 0, 24);
400 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
401 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
402 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
403
404 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
405 skb_put(skb, 10);
406 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
407 IEEE80211_STYPE_REASSOC_REQ);
408 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
409 mgmt->u.reassoc_req.listen_interval =
410 cpu_to_le16(local->hw.conf.listen_interval);
411 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
412 ETH_ALEN);
413 } else {
414 skb_put(skb, 4);
415 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
416 IEEE80211_STYPE_ASSOC_REQ);
417 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
418 mgmt->u.assoc_req.listen_interval =
419 cpu_to_le16(local->hw.conf.listen_interval);
420 }
421
422 /* SSID */
423 pos = skb_put(skb, 2 + assoc_data->ssid_len);
424 *pos++ = WLAN_EID_SSID;
425 *pos++ = assoc_data->ssid_len;
426 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
427
428 /* add all rates which were marked to be used above */
429 supp_rates_len = rates_len;
430 if (supp_rates_len > 8)
431 supp_rates_len = 8;
432
433 pos = skb_put(skb, supp_rates_len + 2);
434 *pos++ = WLAN_EID_SUPP_RATES;
435 *pos++ = supp_rates_len;
436
437 count = 0;
438 for (i = 0; i < sband->n_bitrates; i++) {
439 if (BIT(i) & rates) {
440 int rate = sband->bitrates[i].bitrate;
441 *pos++ = (u8) (rate / 5);
442 if (++count == 8)
443 break;
444 }
445 }
446
447 if (rates_len > count) {
448 pos = skb_put(skb, rates_len - count + 2);
449 *pos++ = WLAN_EID_EXT_SUPP_RATES;
450 *pos++ = rates_len - count;
451
452 for (i++; i < sband->n_bitrates; i++) {
453 if (BIT(i) & rates) {
454 int rate = sband->bitrates[i].bitrate;
455 *pos++ = (u8) (rate / 5);
456 }
457 }
458 }
459
460 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
461 /* 1. power capabilities */
462 pos = skb_put(skb, 4);
463 *pos++ = WLAN_EID_PWR_CAPABILITY;
464 *pos++ = 2;
465 *pos++ = 0; /* min tx power */
466 *pos++ = local->oper_channel->max_power; /* max tx power */
467
468 /* 2. supported channels */
469 /* TODO: get this in reg domain format */
470 pos = skb_put(skb, 2 * sband->n_channels + 2);
471 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
472 *pos++ = 2 * sband->n_channels;
473 for (i = 0; i < sband->n_channels; i++) {
474 *pos++ = ieee80211_frequency_to_channel(
475 sband->channels[i].center_freq);
476 *pos++ = 1; /* one channel in the subband*/
477 }
478 }
479
480 /* if present, add any custom IEs that go before HT */
481 if (assoc_data->ie_len && assoc_data->ie) {
482 static const u8 before_ht[] = {
483 WLAN_EID_SSID,
484 WLAN_EID_SUPP_RATES,
485 WLAN_EID_EXT_SUPP_RATES,
486 WLAN_EID_PWR_CAPABILITY,
487 WLAN_EID_SUPPORTED_CHANNELS,
488 WLAN_EID_RSN,
489 WLAN_EID_QOS_CAPA,
490 WLAN_EID_RRM_ENABLED_CAPABILITIES,
491 WLAN_EID_MOBILITY_DOMAIN,
492 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
493 };
494 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
495 before_ht, ARRAY_SIZE(before_ht),
496 offset);
497 pos = skb_put(skb, noffset - offset);
498 memcpy(pos, assoc_data->ie + offset, noffset - offset);
499 offset = noffset;
500 }
501
4e74bfdb 502 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
9dde6423 503 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
66e67e41
JB		 504 sband, local->oper_channel, ifmgd->ap_smps);
505
506 /* if present, add any custom non-vendor IEs that go after HT */
507 if (assoc_data->ie_len && assoc_data->ie) {
508 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
509 assoc_data->ie_len,
510 offset);
511 pos = skb_put(skb, noffset - offset);
512 memcpy(pos, assoc_data->ie + offset, noffset - offset);
513 offset = noffset;
514 }
515
76f0303d
JB		 516 if (assoc_data->wmm) {
517 if (assoc_data->uapsd) {
dc41e4d4
EP		 518 qos_info = ifmgd->uapsd_queues;
519 qos_info |= (ifmgd->uapsd_max_sp_len <<
66e67e41
JB		 520 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
521 } else {
522 qos_info = 0;
523 }
524
525 pos = skb_put(skb, 9);
526 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
527 *pos++ = 7; /* len */
528 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
529 *pos++ = 0x50;
530 *pos++ = 0xf2;
531 *pos++ = 2; /* WME */
532 *pos++ = 0; /* WME info */
533 *pos++ = 1; /* WME ver */
534 *pos++ = qos_info;
535 }
536
537 /* add any remaining custom (i.e. vendor specific here) IEs */
538 if (assoc_data->ie_len && assoc_data->ie) {
539 noffset = assoc_data->ie_len;
540 pos = skb_put(skb, noffset - offset);
541 memcpy(pos, assoc_data->ie + offset, noffset - offset);
542 }
543
544 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
545 ieee80211_tx_skb(sdata, skb);
546}
547
ef422bc0 548static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 549 const u8 *bssid, u16 stype,
5fef7dbc
JB		 550 u16 reason, bool send_frame,
551 u8 *frame_buf)
9ac19a90
JB		 552{
553 struct ieee80211_local *local = sdata->local;
46900298 554 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9ac19a90 555 struct sk_buff *skb;
5fef7dbc 556 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
d15b8459 557
5fef7dbc
JB		 558 /* build frame */
559 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
560 mgmt->duration = 0; /* initialize only */
561 mgmt->seq_ctrl = 0; /* initialize only */
77fdaa12 562 memcpy(mgmt->da, bssid, ETH_ALEN);
47846c9b 563 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
77fdaa12 564 memcpy(mgmt->bssid, bssid, ETH_ALEN);
ef422bc0 565 /* u.deauth.reason_code == u.disassoc.reason_code */
9ac19a90
JB		 566 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
567
5fef7dbc
JB		 568 if (send_frame) {
569 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
570 DEAUTH_DISASSOC_LEN);
571 if (!skb)
572 return;
d5cdfacb 573
5fef7dbc
JB		 574 skb_reserve(skb, local->hw.extra_tx_headroom);
575
576 /* copy in frame */
577 memcpy(skb_put(skb, DEAUTH_DISASSOC_LEN),
578 mgmt, DEAUTH_DISASSOC_LEN);
579
580 if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED))
581 IEEE80211_SKB_CB(skb)->flags |=
582 IEEE80211_TX_INTFL_DONT_ENCRYPT;
d5cdfacb 583 ieee80211_tx_skb(sdata, skb);
5fef7dbc 584 }
9ac19a90
JB		 585}
586
572e0012
KV		 587void ieee80211_send_pspoll(struct ieee80211_local *local,
588 struct ieee80211_sub_if_data *sdata)
589{
572e0012
KV		 590 struct ieee80211_pspoll *pspoll;
591 struct sk_buff *skb;
572e0012 592
d8cd189e
KV		 593 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
594 if (!skb)
572e0012 595 return;
572e0012 596
d8cd189e
KV		 597 pspoll = (struct ieee80211_pspoll *) skb->data;
598 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
572e0012 599
62ae67be
JB		 600 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
601 ieee80211_tx_skb(sdata, skb);
572e0012
KV		 602}
603
965bedad
JB		 604void ieee80211_send_nullfunc(struct ieee80211_local *local,
605 struct ieee80211_sub_if_data *sdata,
606 int powersave)
607{
608 struct sk_buff *skb;
d8cd189e 609 struct ieee80211_hdr_3addr *nullfunc;
b6f35301 610 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
965bedad 611
d8cd189e
KV		 612 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
613 if (!skb)
965bedad 614 return;
965bedad 615
d8cd189e 616 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
965bedad 617 if (powersave)
d8cd189e 618 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
965bedad 619
62ae67be 620 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
b6f35301
RM		 621 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
622 IEEE80211_STA_CONNECTION_POLL))
623 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
624
62ae67be 625 ieee80211_tx_skb(sdata, skb);
965bedad
JB		 626}
627
d524215f
FF		 628static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
629 struct ieee80211_sub_if_data *sdata)
630{
631 struct sk_buff *skb;
632 struct ieee80211_hdr *nullfunc;
633 __le16 fc;
634
635 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
636 return;
637
638 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
d15b8459 639 if (!skb)
d524215f 640 return;
d15b8459 641
d524215f
FF		 642 skb_reserve(skb, local->hw.extra_tx_headroom);
643
644 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
645 memset(nullfunc, 0, 30);
646 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
647 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
648 nullfunc->frame_control = fc;
649 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
650 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
651 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
652 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
653
654 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
655 ieee80211_tx_skb(sdata, skb);
656}
657
cc32abd4
JB		 658/* spectrum management related things */
659static void ieee80211_chswitch_work(struct work_struct *work)
660{
661 struct ieee80211_sub_if_data *sdata =
662 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
cc32abd4
JB		 663 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
664
9607e6b6 665 if (!ieee80211_sdata_running(sdata))
cc32abd4
JB		 666 return;
667
77fdaa12
JB		 668 mutex_lock(&ifmgd->mtx);
669 if (!ifmgd->associated)
670 goto out;
cc32abd4
JB		 671
672 sdata->local->oper_channel = sdata->local->csa_channel;
5ce6e438
JB		 673 if (!sdata->local->ops->channel_switch) {
674 /* call "hw_config" only if doing sw channel switch */
675 ieee80211_hw_config(sdata->local,
676 IEEE80211_CONF_CHANGE_CHANNEL);
1ea57b1f
SL		 677 } else {
678 /* update the device channel directly */
679 sdata->local->hw.conf.channel = sdata->local->oper_channel;
5ce6e438 680 }
77fdaa12 681
cc32abd4 682 /* XXX: shouldn't really modify cfg80211-owned data! */
0c1ad2ca 683 ifmgd->associated->channel = sdata->local->oper_channel;
cc32abd4 684
cc32abd4
JB		 685 ieee80211_wake_queues_by_reason(&sdata->local->hw,
686 IEEE80211_QUEUE_STOP_REASON_CSA);
77fdaa12
JB		 687 out:
688 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
689 mutex_unlock(&ifmgd->mtx);
cc32abd4
JB		 690}
691
5ce6e438
JB		 692void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
693{
694 struct ieee80211_sub_if_data *sdata;
695 struct ieee80211_if_managed *ifmgd;
696
697 sdata = vif_to_sdata(vif);
698 ifmgd = &sdata->u.mgd;
699
700 trace_api_chswitch_done(sdata, success);
701 if (!success) {
702 /*
703 * If the channel switch was not successful, stay
704 * around on the old channel. We currently lack
705 * good handling of this situation, possibly we
706 * should just drop the association.
707 */
708 sdata->local->csa_channel = sdata->local->oper_channel;
709 }
710
711 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
712}
713EXPORT_SYMBOL(ieee80211_chswitch_done);
714
cc32abd4
JB		 715static void ieee80211_chswitch_timer(unsigned long data)
716{
717 struct ieee80211_sub_if_data *sdata =
718 (struct ieee80211_sub_if_data *) data;
719 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
720
5bb644a0
JB		 721 if (sdata->local->quiescing) {
722 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
723 return;
724 }
725
42935eca 726 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4
JB		 727}
728
729void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
730 struct ieee80211_channel_sw_ie *sw_elem,
5ce6e438
JB		 731 struct ieee80211_bss *bss,
732 u64 timestamp)
cc32abd4 733{
0c1ad2ca
JB		 734 struct cfg80211_bss *cbss =
735 container_of((void *)bss, struct cfg80211_bss, priv);
cc32abd4
JB		 736 struct ieee80211_channel *new_ch;
737 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
59eb21a6
BR		 738 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num,
739 cbss->channel->band);
cc32abd4 740
77fdaa12
JB		 741 ASSERT_MGD_MTX(ifmgd);
742
743 if (!ifmgd->associated)
cc32abd4
JB		 744 return;
745
fbe9c429 746 if (sdata->local->scanning)
cc32abd4
JB		 747 return;
748
749 /* Disregard subsequent beacons if we are already running a timer
750 processing a CSA */
751
752 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
753 return;
754
755 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
756 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
757 return;
758
759 sdata->local->csa_channel = new_ch;
760
5ce6e438
JB		 761 if (sdata->local->ops->channel_switch) {
762 /* use driver's channel switch callback */
763 struct ieee80211_channel_switch ch_switch;
764 memset(&ch_switch, 0, sizeof(ch_switch));
765 ch_switch.timestamp = timestamp;
766 if (sw_elem->mode) {
767 ch_switch.block_tx = true;
768 ieee80211_stop_queues_by_reason(&sdata->local->hw,
769 IEEE80211_QUEUE_STOP_REASON_CSA);
770 }
771 ch_switch.channel = new_ch;
772 ch_switch.count = sw_elem->count;
773 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
774 drv_channel_switch(sdata->local, &ch_switch);
775 return;
776 }
777
778 /* channel switch handled in software */
cc32abd4 779 if (sw_elem->count <= 1) {
42935eca 780 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4 781 } else {
9feaddc7
WYG		 782 if (sw_elem->mode)
783 ieee80211_stop_queues_by_reason(&sdata->local->hw,
cc32abd4
JB		 784 IEEE80211_QUEUE_STOP_REASON_CSA);
785 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
786 mod_timer(&ifmgd->chswitch_timer,
787 jiffies +
788 msecs_to_jiffies(sw_elem->count *
0c1ad2ca 789 cbss->beacon_interval));
cc32abd4
JB		 790 }
791}
792
793static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
794 u16 capab_info, u8 *pwr_constr_elem,
795 u8 pwr_constr_elem_len)
796{
797 struct ieee80211_conf *conf = &sdata->local->hw.conf;
798
799 if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
800 return;
801
802 /* Power constraint IE length should be 1 octet */
803 if (pwr_constr_elem_len != 1)
804 return;
805
a48b13ac 806 if ((*pwr_constr_elem <= conf->channel->max_reg_power) &&
cc32abd4
JB		 807 (*pwr_constr_elem != sdata->local->power_constr_level)) {
808 sdata->local->power_constr_level = *pwr_constr_elem;
809 ieee80211_hw_config(sdata->local, 0);
810 }
811}
812
f90754c1
JO		 813void ieee80211_enable_dyn_ps(struct ieee80211_vif *vif)
814{
815 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
816 struct ieee80211_local *local = sdata->local;
817 struct ieee80211_conf *conf = &local->hw.conf;
818
819 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
820 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
821 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
822
823 local->disable_dynamic_ps = false;
824 conf->dynamic_ps_timeout = local->dynamic_ps_user_timeout;
825}
826EXPORT_SYMBOL(ieee80211_enable_dyn_ps);
827
828void ieee80211_disable_dyn_ps(struct ieee80211_vif *vif)
829{
830 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
831 struct ieee80211_local *local = sdata->local;
832 struct ieee80211_conf *conf = &local->hw.conf;
833
834 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
835 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
836 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
837
838 local->disable_dynamic_ps = true;
839 conf->dynamic_ps_timeout = 0;
840 del_timer_sync(&local->dynamic_ps_timer);
841 ieee80211_queue_work(&local->hw,
842 &local->dynamic_ps_enable_work);
843}
844EXPORT_SYMBOL(ieee80211_disable_dyn_ps);
845
965bedad
JB		 846/* powersave */
847static void ieee80211_enable_ps(struct ieee80211_local *local,
848 struct ieee80211_sub_if_data *sdata)
849{
850 struct ieee80211_conf *conf = &local->hw.conf;
851
d5edaedc
JB		 852 /*
853 * If we are scanning right now then the parameters will
854 * take effect when scan finishes.
855 */
fbe9c429 856 if (local->scanning)
d5edaedc
JB		 857 return;
858
965bedad
JB		 859 if (conf->dynamic_ps_timeout > 0 &&
860 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
861 mod_timer(&local->dynamic_ps_timer, jiffies +
862 msecs_to_jiffies(conf->dynamic_ps_timeout));
863 } else {
864 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
865 ieee80211_send_nullfunc(local, sdata, 1);
375177bf 866
2a13052f
JO		 867 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
868 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
869 return;
870
871 conf->flags |= IEEE80211_CONF_PS;
872 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965bedad
JB		 873 }
874}
875
876static void ieee80211_change_ps(struct ieee80211_local *local)
877{
878 struct ieee80211_conf *conf = &local->hw.conf;
879
880 if (local->ps_sdata) {
965bedad
JB		 881 ieee80211_enable_ps(local, local->ps_sdata);
882 } else if (conf->flags & IEEE80211_CONF_PS) {
883 conf->flags &= ~IEEE80211_CONF_PS;
884 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
885 del_timer_sync(&local->dynamic_ps_timer);
886 cancel_work_sync(&local->dynamic_ps_enable_work);
887 }
888}
889
808118cb
JY		 890static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
891{
892 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
893 struct sta_info *sta = NULL;
c2c98fde 894 bool authorized = false;
808118cb
JY		 895
896 if (!mgd->powersave)
897 return false;
898
05cb9108
JB		 899 if (mgd->broken_ap)
900 return false;
901
808118cb
JY		 902 if (!mgd->associated)
903 return false;
904
905 if (!mgd->associated->beacon_ies)
906 return false;
907
908 if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
909 IEEE80211_STA_CONNECTION_POLL))
910 return false;
911
912 rcu_read_lock();
913 sta = sta_info_get(sdata, mgd->bssid);
914 if (sta)
c2c98fde 915 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
808118cb
JY		 916 rcu_read_unlock();
917
c2c98fde 918 return authorized;
808118cb
JY		 919}
920
965bedad 921/* need to hold RTNL or interface lock */
10f644a4 922void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 923{
924 struct ieee80211_sub_if_data *sdata, *found = NULL;
925 int count = 0;
195e294d 926 int timeout;
965bedad
JB		 927
928 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
929 local->ps_sdata = NULL;
930 return;
931 }
932
933 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 934 if (!ieee80211_sdata_running(sdata))
965bedad 935 continue;
8c7914de
RM		 936 if (sdata->vif.type == NL80211_IFTYPE_AP) {
937 /* If an AP vif is found, then disable PS
938 * by setting the count to zero thereby setting
939 * ps_sdata to NULL.
940 */
941 count = 0;
942 break;
943 }
965bedad
JB		 944 if (sdata->vif.type != NL80211_IFTYPE_STATION)
945 continue;
946 found = sdata;
947 count++;
948 }
949
808118cb 950 if (count == 1 && ieee80211_powersave_allowed(found)) {
f90754c1 951 struct ieee80211_conf *conf = &local->hw.conf;
10f644a4
JB		 952 s32 beaconint_us;
953
954 if (latency < 0)
ed77134b 955 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
10f644a4
JB		 956
957 beaconint_us = ieee80211_tu_to_usec(
958 found->vif.bss_conf.beacon_int);
959
ff616381 960 timeout = local->dynamic_ps_forced_timeout;
195e294d
JO		 961 if (timeout < 0) {
962 /*
ff616381
JO		 963 * Go to full PSM if the user configures a very low
964 * latency requirement.
0ab82b04
EP		 965 * The 2000 second value is there for compatibility
966 * until the PM_QOS_NETWORK_LATENCY is configured
967 * with real values.
195e294d 968 */
0ab82b04
EP		 969 if (latency > (1900 * USEC_PER_MSEC) &&
970 latency != (2000 * USEC_PER_SEC))
195e294d 971 timeout = 0;
ff616381
JO		 972 else
973 timeout = 100;
195e294d 974 }
f90754c1
JO		 975 local->dynamic_ps_user_timeout = timeout;
976 if (!local->disable_dynamic_ps)
977 conf->dynamic_ps_timeout =
978 local->dynamic_ps_user_timeout;
195e294d 979
04fe2037 980 if (beaconint_us > latency) {
10f644a4 981 local->ps_sdata = NULL;
04fe2037 982 } else {
56007a02 983 struct ieee80211_bss *bss;
04fe2037 984 int maxslp = 1;
56007a02 985 u8 dtimper;
04fe2037 986
56007a02
JB		 987 bss = (void *)found->u.mgd.associated->priv;
988 dtimper = bss->dtim_period;
989
990 /* If the TIM IE is invalid, pretend the value is 1 */
991 if (!dtimper)
992 dtimper = 1;
993 else if (dtimper > 1)
04fe2037
JB		 994 maxslp = min_t(int, dtimper,
995 latency / beaconint_us);
996
9ccebe61 997 local->hw.conf.max_sleep_period = maxslp;
56007a02 998 local->hw.conf.ps_dtim_period = dtimper;
10f644a4 999 local->ps_sdata = found;
04fe2037 1000 }
10f644a4 1001 } else {
965bedad 1002 local->ps_sdata = NULL;
10f644a4 1003 }
965bedad
JB		 1004
1005 ieee80211_change_ps(local);
1006}
1007
1008void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1009{
1010 struct ieee80211_local *local =
1011 container_of(work, struct ieee80211_local,
1012 dynamic_ps_disable_work);
1013
1014 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1015 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1016 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1017 }
1018
1019 ieee80211_wake_queues_by_reason(&local->hw,
1020 IEEE80211_QUEUE_STOP_REASON_PS);
1021}
1022
1023void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1024{
1025 struct ieee80211_local *local =
1026 container_of(work, struct ieee80211_local,
1027 dynamic_ps_enable_work);
1028 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
5e34069c 1029 struct ieee80211_if_managed *ifmgd;
1ddc2867
RM		 1030 unsigned long flags;
1031 int q;
965bedad
JB		 1032
1033 /* can only happen when PS was just disabled anyway */
1034 if (!sdata)
1035 return;
1036
5e34069c
CL		 1037 ifmgd = &sdata->u.mgd;
1038
965bedad
JB		 1039 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1040 return;
1041
77b7023a
AN		 1042 if (!local->disable_dynamic_ps &&
1043 local->hw.conf.dynamic_ps_timeout > 0) {
1044 /* don't enter PS if TX frames are pending */
1045 if (drv_tx_frames_pending(local)) {
1ddc2867
RM		 1046 mod_timer(&local->dynamic_ps_timer, jiffies +
1047 msecs_to_jiffies(
1048 local->hw.conf.dynamic_ps_timeout));
1049 return;
1050 }
77b7023a
AN		 1051
1052 /*
1053 * transmission can be stopped by others which leads to
1054 * dynamic_ps_timer expiry. Postpone the ps timer if it
1055 * is not the actual idle state.
1056 */
1057 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1058 for (q = 0; q < local->hw.queues; q++) {
1059 if (local->queue_stop_reasons[q]) {
1060 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1061 flags);
1062 mod_timer(&local->dynamic_ps_timer, jiffies +
1063 msecs_to_jiffies(
1064 local->hw.conf.dynamic_ps_timeout));
1065 return;
1066 }
1067 }
1068 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1ddc2867 1069 }
1ddc2867 1070
375177bf 1071 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
9c38a8b4 1072 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
f3e85b9e 1073 netif_tx_stop_all_queues(sdata->dev);
965bedad 1074
e8306f98
VN		 1075 if (drv_tx_frames_pending(local))
1076 mod_timer(&local->dynamic_ps_timer, jiffies +
1077 msecs_to_jiffies(
1078 local->hw.conf.dynamic_ps_timeout));
1079 else {
1080 ieee80211_send_nullfunc(local, sdata, 1);
1081 /* Flush to get the tx status of nullfunc frame */
1082 drv_flush(local, false);
1083 }
f3e85b9e
VN		 1084 }
1085
2a13052f
JO		 1086 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1087 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
375177bf
VN		 1088 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1089 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1090 local->hw.conf.flags |= IEEE80211_CONF_PS;
1091 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1092 }
f3e85b9e 1093
77b7023a
AN		 1094 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1095 netif_tx_wake_all_queues(sdata->dev);
965bedad
JB		 1096}
1097
1098void ieee80211_dynamic_ps_timer(unsigned long data)
1099{
1100 struct ieee80211_local *local = (void *) data;
1101
78f1a8b7 1102 if (local->quiescing || local->suspended)
5bb644a0
JB		 1103 return;
1104
42935eca 1105 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 1106}
1107
60f8b39c 1108/* MLME */
f698d856 1109static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
4ced3f74 1110 struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1111 u8 *wmm_param, size_t wmm_param_len)
1112{
f0706e82 1113 struct ieee80211_tx_queue_params params;
4ced3f74 1114 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1115 size_t left;
1116 int count;
ab13315a 1117 u8 *pos, uapsd_queues = 0;
f0706e82 1118
e1b3ec1a
SG		 1119 if (!local->ops->conf_tx)
1120 return;
1121
32c5057b 1122 if (local->hw.queues < IEEE80211_NUM_ACS)
3434fbd3
JB		 1123 return;
1124
1125 if (!wmm_param)
1126 return;
1127
f0706e82
JB		 1128 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1129 return;
ab13315a
KV		 1130
1131 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
dc41e4d4 1132 uapsd_queues = ifmgd->uapsd_queues;
ab13315a 1133
f0706e82 1134 count = wmm_param[6] & 0x0f;
46900298 1135 if (count == ifmgd->wmm_last_param_set)
f0706e82 1136 return;
46900298 1137 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 1138
1139 pos = wmm_param + 8;
1140 left = wmm_param_len - 8;
1141
1142 memset(&params, 0, sizeof(params));
1143
f0706e82
JB		 1144 local->wmm_acm = 0;
1145 for (; left >= 4; left -= 4, pos += 4) {
1146 int aci = (pos[0] >> 5) & 0x03;
1147 int acm = (pos[0] >> 4) & 0x01;
ab13315a 1148 bool uapsd = false;
f0706e82
JB		 1149 int queue;
1150
1151 switch (aci) {
0eeb59fe 1152 case 1: /* AC_BK */
e100bb64 1153 queue = 3;
988c0f72 1154 if (acm)
0eeb59fe 1155 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV		 1156 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1157 uapsd = true;
f0706e82 1158 break;
0eeb59fe 1159 case 2: /* AC_VI */
e100bb64 1160 queue = 1;
988c0f72 1161 if (acm)
0eeb59fe 1162 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV		 1163 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1164 uapsd = true;
f0706e82 1165 break;
0eeb59fe 1166 case 3: /* AC_VO */
e100bb64 1167 queue = 0;
988c0f72 1168 if (acm)
0eeb59fe 1169 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV		 1170 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1171 uapsd = true;
f0706e82 1172 break;
0eeb59fe 1173 case 0: /* AC_BE */
f0706e82 1174 default:
e100bb64 1175 queue = 2;
988c0f72 1176 if (acm)
0eeb59fe 1177 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV		 1178 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1179 uapsd = true;
f0706e82
JB		 1180 break;
1181 }
1182
1183 params.aifs = pos[0] & 0x0f;
1184 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1185 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 1186 params.txop = get_unaligned_le16(pos + 2);
ab13315a
KV		 1187 params.uapsd = uapsd;
1188
f4ea83dd 1189#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
0fb9a9ec
JP		 1190 wiphy_debug(local->hw.wiphy,
1191 "WMM queue=%d aci=%d acm=%d aifs=%d "
1192 "cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1193 queue, aci, acm,
1194 params.aifs, params.cw_min, params.cw_max,
1195 params.txop, params.uapsd);
3330d7be 1196#endif
f6f3def3
EP		 1197 sdata->tx_conf[queue] = params;
1198 if (drv_conf_tx(local, sdata, queue, &params))
0fb9a9ec
JP		 1199 wiphy_debug(local->hw.wiphy,
1200 "failed to set TX queue parameters for queue %d\n",
1201 queue);
f0706e82 1202 }
e1b3ec1a
SG		 1203
1204 /* enable WMM or activate new settings */
4ced3f74 1205 sdata->vif.bss_conf.qos = true;
f0706e82
JB		 1206}
1207
925e64c3
SG		 1208static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1209{
1210 lockdep_assert_held(&sdata->local->mtx);
1211
1212 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1213 IEEE80211_STA_BEACON_POLL);
1214 ieee80211_run_deferred_scan(sdata->local);
1215}
1216
1217static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1218{
1219 mutex_lock(&sdata->local->mtx);
1220 __ieee80211_stop_poll(sdata);
1221 mutex_unlock(&sdata->local->mtx);
1222}
1223
7a5158ef
JB		 1224static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1225 u16 capab, bool erp_valid, u8 erp)
5628221c 1226{
bda3933a 1227 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 1228 u32 changed = 0;
7a5158ef
JB		 1229 bool use_protection;
1230 bool use_short_preamble;
1231 bool use_short_slot;
1232
1233 if (erp_valid) {
1234 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1235 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1236 } else {
1237 use_protection = false;
1238 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1239 }
1240
1241 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
43d35343
FF		 1242 if (sdata->local->hw.conf.channel->band == IEEE80211_BAND_5GHZ)
1243 use_short_slot = true;
5628221c 1244
471b3efd 1245 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 1246 bss_conf->use_cts_prot = use_protection;
1247 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 1248 }
7e9ed188 1249
d43c7b37 1250 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 1251 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 1252 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 1253 }
d9430a32 1254
7a5158ef 1255 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 1256 bss_conf->use_short_slot = use_short_slot;
1257 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 1258 }
1259
1260 return changed;
1261}
1262
f698d856 1263static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 1264 struct cfg80211_bss *cbss,
ae5eb026 1265 u32 bss_info_changed)
f0706e82 1266{
0c1ad2ca 1267 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 1268 struct ieee80211_local *local = sdata->local;
68542962 1269 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
d6f2da5b 1270
ae5eb026 1271 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 1272 /* set timing information */
68542962 1273 bss_conf->beacon_int = cbss->beacon_interval;
e9ac0745 1274 bss_conf->last_tsf = cbss->tsf;
5628221c 1275
77fdaa12
JB		 1276 bss_info_changed |= BSS_CHANGED_BEACON_INT;
1277 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
50ae34a2 1278 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 1279
7ccc8bd7
FF		 1280 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1281 IEEE80211_BEACON_LOSS_COUNT * bss_conf->beacon_int));
1282
0c1ad2ca
JB		 1283 sdata->u.mgd.associated = cbss;
1284 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 1285
17e4ec14
JM		 1286 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1287
b291ba11 1288 /* just to be sure */
925e64c3 1289 ieee80211_stop_poll(sdata);
b291ba11 1290
9ac19a90 1291 ieee80211_led_assoc(local, 1);
9306102e 1292
e5b900d2
JB		 1293 if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
1294 bss_conf->dtim_period = bss->dtim_period;
1295 else
1296 bss_conf->dtim_period = 0;
1297
68542962 1298 bss_conf->assoc = 1;
9cef8737 1299
a97c13c3 1300 /* Tell the driver to monitor connection quality (if supported) */
ea086359 1301 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
68542962 1302 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 1303 bss_info_changed |= BSS_CHANGED_CQM;
1304
68542962
JO		 1305 /* Enable ARP filtering */
1306 if (bss_conf->arp_filter_enabled != sdata->arp_filter_state) {
1307 bss_conf->arp_filter_enabled = sdata->arp_filter_state;
1308 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1309 }
1310
ae5eb026 1311 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 1312
056508dc
JB		 1313 mutex_lock(&local->iflist_mtx);
1314 ieee80211_recalc_ps(local, -1);
025e6be2 1315 ieee80211_recalc_smps(local);
056508dc 1316 mutex_unlock(&local->iflist_mtx);
e0cb686f 1317
8a5b33f5 1318 netif_tx_start_all_queues(sdata->dev);
9ac19a90 1319 netif_carrier_on(sdata->dev);
f0706e82
JB		 1320}
1321
e69e95db 1322static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
37ad3888
JB		 1323 u16 stype, u16 reason, bool tx,
1324 u8 *frame_buf)
aa458d17 1325{
46900298 1326 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17
TW		 1327 struct ieee80211_local *local = sdata->local;
1328 struct sta_info *sta;
3cc5240b 1329 u32 changed = 0;
b291ba11 1330 u8 bssid[ETH_ALEN];
aa458d17 1331
77fdaa12
JB		 1332 ASSERT_MGD_MTX(ifmgd);
1333
37ad3888
JB		 1334 if (WARN_ON_ONCE(tx && !frame_buf))
1335 return;
1336
b291ba11
JB		 1337 if (WARN_ON(!ifmgd->associated))
1338 return;
1339
0c1ad2ca 1340 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
b291ba11 1341
77fdaa12
JB		 1342 ifmgd->associated = NULL;
1343 memset(ifmgd->bssid, 0, ETH_ALEN);
1344
1345 /*
1346 * we need to commit the associated = NULL change because the
1347 * scan code uses that to determine whether this iface should
1348 * go to/wake up from powersave or not -- and could otherwise
1349 * wake the queues erroneously.
1350 */
1351 smp_mb();
1352
1353 /*
1354 * Thus, we can only afterwards stop the queues -- to account
1355 * for the case where another CPU is finishing a scan at this
1356 * time -- we don't want the scan code to enable queues.
1357 */
aa458d17 1358
8a5b33f5 1359 netif_tx_stop_all_queues(sdata->dev);
aa458d17
TW		 1360 netif_carrier_off(sdata->dev);
1361
2a419056 1362 mutex_lock(&local->sta_mtx);
abe60632 1363 sta = sta_info_get(sdata, bssid);
4cad6c7c 1364 if (sta) {
c2c98fde 1365 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
53f73c09 1366 ieee80211_sta_tear_down_BA_sessions(sta, tx);
4cad6c7c 1367 }
2a419056 1368 mutex_unlock(&local->sta_mtx);
aa458d17 1369
37ad3888
JB		 1370 /* deauthenticate/disassociate now */
1371 if (tx || frame_buf)
1372 ieee80211_send_deauth_disassoc(sdata, bssid, stype, reason,
1373 tx, frame_buf);
1374
1375 /* flush out frame */
1376 if (tx)
1377 drv_flush(local, false);
1378
1379 /* remove AP and TDLS peers */
1380 sta_info_flush(local, sdata);
1381
1382 /* finally reset all BSS / config parameters */
f5e5bf25
TW		 1383 changed |= ieee80211_reset_erp_info(sdata);
1384
f5e5bf25 1385 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 1386 changed |= BSS_CHANGED_ASSOC;
1387 sdata->vif.bss_conf.assoc = false;
f5e5bf25 1388
413ad50a 1389 /* on the next assoc, re-program HT parameters */
ef96a842
BG		 1390 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1391 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
413ad50a 1392
a8302de9
VT		 1393 local->power_constr_level = 0;
1394
520eb820
KV		 1395 del_timer_sync(&local->dynamic_ps_timer);
1396 cancel_work_sync(&local->dynamic_ps_enable_work);
1397
e0cb686f
KV		 1398 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1399 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3cc5240b 1400 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
e0cb686f 1401 }
a331400b 1402 local->ps_sdata = NULL;
ae5eb026 1403
68542962
JO		 1404 /* Disable ARP filtering */
1405 if (sdata->vif.bss_conf.arp_filter_enabled) {
1406 sdata->vif.bss_conf.arp_filter_enabled = false;
1407 changed |= BSS_CHANGED_ARP_FILTER;
1408 }
1409
3abead59
JB		 1410 sdata->vif.bss_conf.qos = false;
1411 changed |= BSS_CHANGED_QOS;
1412
0aaffa9b
JB		 1413 /* The BSSID (not really interesting) and HT changed */
1414 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 1415 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 1416
3cc5240b
JB		 1417 /* channel(_type) changes are handled by ieee80211_hw_config */
1418 WARN_ON(!ieee80211_set_channel_type(local, sdata, NL80211_CHAN_NO_HT));
1419 ieee80211_hw_config(local, 0);
1420
3abead59
JB		 1421 /* disassociated - set to defaults now */
1422 ieee80211_set_wmm_default(sdata, false);
1423
b9dcf712
JB		 1424 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1425 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1426 del_timer_sync(&sdata->u.mgd.timer);
1427 del_timer_sync(&sdata->u.mgd.chswitch_timer);
aa458d17 1428}
f0706e82 1429
3cf335d5
KV		 1430void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1431 struct ieee80211_hdr *hdr)
1432{
1433 /*
1434 * We can postpone the mgd.timer whenever receiving unicast frames
1435 * from AP because we know that the connection is working both ways
1436 * at that time. But multicast frames (and hence also beacons) must
1437 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 1438 * data idle periods for sending the periodic probe request to the
1439 * AP we're connected to.
3cf335d5 1440 */
b291ba11
JB		 1441 if (is_multicast_ether_addr(hdr->addr1))
1442 return;
1443
be099e82 1444 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 1445}
f0706e82 1446
4e5ff376
FF		 1447static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1448{
1449 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
133d40f9 1450 struct ieee80211_local *local = sdata->local;
4e5ff376 1451
133d40f9 1452 mutex_lock(&local->mtx);
4e5ff376 1453 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
133d40f9
SG		 1454 IEEE80211_STA_CONNECTION_POLL))) {
1455 mutex_unlock(&local->mtx);
1456 return;
1457 }
4e5ff376 1458
925e64c3 1459 __ieee80211_stop_poll(sdata);
133d40f9
SG		 1460
1461 mutex_lock(&local->iflist_mtx);
1462 ieee80211_recalc_ps(local, -1);
1463 mutex_unlock(&local->iflist_mtx);
4e5ff376
FF		 1464
1465 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
133d40f9 1466 goto out;
4e5ff376
FF		 1467
1468 /*
1469 * We've received a probe response, but are not sure whether
1470 * we have or will be receiving any beacons or data, so let's
1471 * schedule the timers again, just in case.
1472 */
1473 ieee80211_sta_reset_beacon_monitor(sdata);
1474
1475 mod_timer(&ifmgd->conn_mon_timer,
1476 round_jiffies_up(jiffies +
1477 IEEE80211_CONNECTION_IDLE_TIME));
133d40f9 1478out:
133d40f9 1479 mutex_unlock(&local->mtx);
4e5ff376
FF		 1480}
1481
1482void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
04ac3c0e 1483 struct ieee80211_hdr *hdr, bool ack)
4e5ff376 1484{
75706d0e 1485 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF		 1486 return;
1487
04ac3c0e
FF		 1488 if (ack)
1489 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF		 1490
1491 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1492 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e
FF		 1493 if (ack)
1494 sdata->u.mgd.probe_send_count = 0;
1495 else
1496 sdata->u.mgd.nullfunc_failed = true;
4e5ff376
FF		 1497 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1498 }
1499}
1500
a43abf29
ML		 1501static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1502{
1503 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1504 const u8 *ssid;
f01a067d 1505 u8 *dst = ifmgd->associated->bssid;
180205bd 1506 u8 unicast_limit = max(1, max_probe_tries - 3);
f01a067d
LR		 1507
1508 /*
1509 * Try sending broadcast probe requests for the last three
1510 * probe requests after the first ones failed since some
1511 * buggy APs only support broadcast probe requests.
1512 */
1513 if (ifmgd->probe_send_count >= unicast_limit)
1514 dst = NULL;
a43abf29 1515
4e5ff376
FF		 1516 /*
1517 * When the hardware reports an accurate Tx ACK status, it's
1518 * better to send a nullfunc frame instead of a probe request,
1519 * as it will kick us off the AP quickly if we aren't associated
1520 * anymore. The timeout will be reset if the frame is ACKed by
1521 * the AP.
1522 */
992e68bf
SD		 1523 ifmgd->probe_send_count++;
1524
04ac3c0e
FF		 1525 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1526 ifmgd->nullfunc_failed = false;
4e5ff376 1527 ieee80211_send_nullfunc(sdata->local, sdata, 0);
04ac3c0e 1528 } else {
88c868c4
SG		 1529 int ssid_len;
1530
4e5ff376 1531 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
88c868c4
SG		 1532 if (WARN_ON_ONCE(ssid == NULL))
1533 ssid_len = 0;
1534 else
1535 ssid_len = ssid[1];
1536
1537 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
1538 0, (u32) -1, true, false);
4e5ff376 1539 }
a43abf29 1540
180205bd 1541 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
a43abf29 1542 run_again(ifmgd, ifmgd->probe_timeout);
f69b9c79
RM		 1543 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
1544 drv_flush(sdata->local, false);
a43abf29
ML		 1545}
1546
b291ba11
JB		 1547static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1548 bool beacon)
04de8381 1549{
04de8381 1550 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 1551 bool already = false;
34bfc411 1552
9607e6b6 1553 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 1554 return;
1555
77fdaa12
JB		 1556 mutex_lock(&ifmgd->mtx);
1557
1558 if (!ifmgd->associated)
1559 goto out;
1560
133d40f9
SG		 1561 mutex_lock(&sdata->local->mtx);
1562
1563 if (sdata->local->tmp_channel || sdata->local->scanning) {
1564 mutex_unlock(&sdata->local->mtx);
1565 goto out;
1566 }
1567
a860402d 1568#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
e87cc472
JP		 1569 if (beacon)
1570 net_dbg_ratelimited("%s: detected beacon loss from AP - sending probe request\n",
1571 sdata->name);
a860402d 1572#endif
6efb71b0
HS		 1573 ieee80211_cqm_rssi_notify(&sdata->vif,
1574 NL80211_CQM_RSSI_BEACON_LOSS_EVENT, GFP_KERNEL);
04de8381 1575
b291ba11
JB		 1576 /*
1577 * The driver/our work has already reported this event or the
1578 * connection monitoring has kicked in and we have already sent
1579 * a probe request. Or maybe the AP died and the driver keeps
1580 * reporting until we disassociate...
1581 *
1582 * In either case we have to ignore the current call to this
1583 * function (except for setting the correct probe reason bit)
1584 * because otherwise we would reset the timer every time and
1585 * never check whether we received a probe response!
1586 */
1587 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1588 IEEE80211_STA_CONNECTION_POLL))
1589 already = true;
1590
1591 if (beacon)
1592 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1593 else
1594 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1595
133d40f9
SG		 1596 mutex_unlock(&sdata->local->mtx);
1597
b291ba11
JB		 1598 if (already)
1599 goto out;
1600
4e751843
JB		 1601 mutex_lock(&sdata->local->iflist_mtx);
1602 ieee80211_recalc_ps(sdata->local, -1);
1603 mutex_unlock(&sdata->local->iflist_mtx);
1604
a43abf29
ML		 1605 ifmgd->probe_send_count = 0;
1606 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12
JB		 1607 out:
1608 mutex_unlock(&ifmgd->mtx);
04de8381
KV		 1609}
1610
a619a4c0
JO		 1611struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
1612 struct ieee80211_vif *vif)
1613{
1614 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1615 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1616 struct sk_buff *skb;
1617 const u8 *ssid;
88c868c4 1618 int ssid_len;
a619a4c0
JO		 1619
1620 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1621 return NULL;
1622
1623 ASSERT_MGD_MTX(ifmgd);
1624
1625 if (!ifmgd->associated)
1626 return NULL;
1627
1628 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
88c868c4
SG		 1629 if (WARN_ON_ONCE(ssid == NULL))
1630 ssid_len = 0;
1631 else
1632 ssid_len = ssid[1];
1633
a619a4c0 1634 skb = ieee80211_build_probe_req(sdata, ifmgd->associated->bssid,
88c868c4 1635 (u32) -1, ssid + 2, ssid_len,
85a237fe 1636 NULL, 0, true);
a619a4c0
JO		 1637
1638 return skb;
1639}
1640EXPORT_SYMBOL(ieee80211_ap_probereq_get);
1641
1e4dcd01
JO		 1642static void __ieee80211_connection_loss(struct ieee80211_sub_if_data *sdata)
1643{
1644 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1645 struct ieee80211_local *local = sdata->local;
1646 u8 bssid[ETH_ALEN];
5fef7dbc 1647 u8 frame_buf[DEAUTH_DISASSOC_LEN];
1e4dcd01
JO		 1648
1649 mutex_lock(&ifmgd->mtx);
1650 if (!ifmgd->associated) {
1651 mutex_unlock(&ifmgd->mtx);
1652 return;
1653 }
1654
1655 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
1656
f0d23208 1657 pr_debug("%s: Connection to AP %pM lost\n", sdata->name, bssid);
1e4dcd01 1658
37ad3888
JB		 1659 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
1660 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
1661 false, frame_buf);
1e4dcd01 1662 mutex_unlock(&ifmgd->mtx);
7da7cc1d 1663
1e4dcd01
JO		 1664 /*
1665 * must be outside lock due to cfg80211,
1666 * but that's not a problem.
1667 */
5fef7dbc 1668 cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
fcac4fb0
FF		 1669
1670 mutex_lock(&local->mtx);
1671 ieee80211_recalc_idle(local);
1672 mutex_unlock(&local->mtx);
1e4dcd01
JO		 1673}
1674
1675void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 1676{
1677 struct ieee80211_sub_if_data *sdata =
1678 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 1679 u.mgd.beacon_connection_loss_work);
a85e1d55
PS		 1680 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1681 struct sta_info *sta;
1682
1683 if (ifmgd->associated) {
30fa9047 1684 rcu_read_lock();
a85e1d55
PS		 1685 sta = sta_info_get(sdata, ifmgd->bssid);
1686 if (sta)
1687 sta->beacon_loss_count++;
30fa9047 1688 rcu_read_unlock();
a85e1d55 1689 }
b291ba11 1690
1e4dcd01
JO		 1691 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1692 __ieee80211_connection_loss(sdata);
1693 else
1694 ieee80211_mgd_probe_ap(sdata, true);
b291ba11
JB		 1695}
1696
04de8381
KV		 1697void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1698{
1699 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 1700 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 1701
b5878a2d
JB		 1702 trace_api_beacon_loss(sdata);
1703
1e4dcd01
JO		 1704 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
1705 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 1706}
1707EXPORT_SYMBOL(ieee80211_beacon_loss);
1708
1e4dcd01
JO		 1709void ieee80211_connection_loss(struct ieee80211_vif *vif)
1710{
1711 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1712 struct ieee80211_hw *hw = &sdata->local->hw;
1713
b5878a2d
JB		 1714 trace_api_connection_loss(sdata);
1715
1e4dcd01
JO		 1716 WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR));
1717 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1718}
1719EXPORT_SYMBOL(ieee80211_connection_loss);
1720
1721
66e67e41
JB		 1722static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
1723 bool assoc)
1724{
1725 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1726
1727 lockdep_assert_held(&sdata->u.mgd.mtx);
1728
66e67e41
JB		 1729 if (!assoc) {
1730 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
1731
1732 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
1733 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
1734 }
1735
1736 cfg80211_put_bss(auth_data->bss);
1737 kfree(auth_data);
1738 sdata->u.mgd.auth_data = NULL;
1739}
1740
1741static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1742 struct ieee80211_mgmt *mgmt, size_t len)
1743{
1744 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1745 u8 *pos;
1746 struct ieee802_11_elems elems;
1747
1748 pos = mgmt->u.auth.variable;
1749 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1750 if (!elems.challenge)
1751 return;
1752 auth_data->expected_transaction = 4;
1753 ieee80211_send_auth(sdata, 3, auth_data->algorithm,
1754 elems.challenge - 2, elems.challenge_len + 2,
1755 auth_data->bss->bssid, auth_data->bss->bssid,
1756 auth_data->key, auth_data->key_len,
1757 auth_data->key_idx);
1758}
1759
1760static enum rx_mgmt_action __must_check
1761ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1762 struct ieee80211_mgmt *mgmt, size_t len)
1763{
1764 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1765 u8 bssid[ETH_ALEN];
1766 u16 auth_alg, auth_transaction, status_code;
1767 struct sta_info *sta;
1768
1769 lockdep_assert_held(&ifmgd->mtx);
1770
1771 if (len < 24 + 6)
1772 return RX_MGMT_NONE;
1773
1774 if (!ifmgd->auth_data || ifmgd->auth_data->done)
1775 return RX_MGMT_NONE;
1776
1777 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
1778
b203ca39 1779 if (!ether_addr_equal(bssid, mgmt->bssid))
66e67e41
JB		 1780 return RX_MGMT_NONE;
1781
1782 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1783 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1784 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1785
1786 if (auth_alg != ifmgd->auth_data->algorithm ||
1787 auth_transaction != ifmgd->auth_data->expected_transaction)
1788 return RX_MGMT_NONE;
1789
1790 if (status_code != WLAN_STATUS_SUCCESS) {
f0d23208
JP		 1791 pr_debug("%s: %pM denied authentication (status %d)\n",
1792 sdata->name, mgmt->sa, status_code);
dac211ec
EP		 1793 ieee80211_destroy_auth_data(sdata, false);
1794 return RX_MGMT_CFG80211_RX_AUTH;
66e67e41
JB		 1795 }
1796
1797 switch (ifmgd->auth_data->algorithm) {
1798 case WLAN_AUTH_OPEN:
1799 case WLAN_AUTH_LEAP:
1800 case WLAN_AUTH_FT:
1801 break;
1802 case WLAN_AUTH_SHARED_KEY:
1803 if (ifmgd->auth_data->expected_transaction != 4) {
1804 ieee80211_auth_challenge(sdata, mgmt, len);
1805 /* need another frame */
1806 return RX_MGMT_NONE;
1807 }
1808 break;
1809 default:
1810 WARN_ONCE(1, "invalid auth alg %d",
1811 ifmgd->auth_data->algorithm);
1812 return RX_MGMT_NONE;
1813 }
1814
f0d23208 1815 pr_debug("%s: authenticated\n", sdata->name);
66e67e41
JB		 1816 ifmgd->auth_data->done = true;
1817 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
1818 run_again(ifmgd, ifmgd->auth_data->timeout);
1819
1820 /* move station state to auth */
1821 mutex_lock(&sdata->local->sta_mtx);
1822 sta = sta_info_get(sdata, bssid);
1823 if (!sta) {
1824 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
1825 goto out_err;
1826 }
1827 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
f0d23208 1828 pr_debug("%s: failed moving %pM to auth\n", sdata->name, bssid);
66e67e41
JB		 1829 goto out_err;
1830 }
1831 mutex_unlock(&sdata->local->sta_mtx);
1832
1833 return RX_MGMT_CFG80211_RX_AUTH;
1834 out_err:
1835 mutex_unlock(&sdata->local->sta_mtx);
1836 /* ignore frame -- wait for timeout */
1837 return RX_MGMT_NONE;
1838}
1839
1840
77fdaa12
JB		 1841static enum rx_mgmt_action __must_check
1842ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
77fdaa12 1843 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1844{
46900298 1845 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 1846 const u8 *bssid = NULL;
f0706e82
JB		 1847 u16 reason_code;
1848
66e67e41
JB		 1849 lockdep_assert_held(&ifmgd->mtx);
1850
f4ea83dd 1851 if (len < 24 + 2)
77fdaa12 1852 return RX_MGMT_NONE;
f0706e82 1853
66e67e41 1854 if (!ifmgd->associated ||
b203ca39 1855 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
66e67e41 1856 return RX_MGMT_NONE;
77fdaa12 1857
0c1ad2ca 1858 bssid = ifmgd->associated->bssid;
f0706e82
JB		 1859
1860 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1861
f0d23208
JP		 1862 pr_debug("%s: deauthenticated from %pM (Reason: %u)\n",
1863 sdata->name, bssid, reason_code);
77fdaa12 1864
37ad3888
JB		 1865 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
1866
7da7cc1d 1867 mutex_lock(&sdata->local->mtx);
63f170e0 1868 ieee80211_recalc_idle(sdata->local);
7da7cc1d 1869 mutex_unlock(&sdata->local->mtx);
f0706e82 1870
77fdaa12 1871 return RX_MGMT_CFG80211_DEAUTH;
f0706e82
JB		 1872}
1873
1874
77fdaa12
JB		 1875static enum rx_mgmt_action __must_check
1876ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1877 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1878{
46900298 1879 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1880 u16 reason_code;
1881
66e67e41 1882 lockdep_assert_held(&ifmgd->mtx);
77fdaa12 1883
66e67e41 1884 if (len < 24 + 2)
77fdaa12
JB		 1885 return RX_MGMT_NONE;
1886
66e67e41 1887 if (!ifmgd->associated ||
b203ca39 1888 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
77fdaa12 1889 return RX_MGMT_NONE;
f0706e82
JB		 1890
1891 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1892
f0d23208
JP		 1893 pr_debug("%s: disassociated from %pM (Reason: %u)\n",
1894 sdata->name, mgmt->sa, reason_code);
f0706e82 1895
37ad3888
JB		 1896 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
1897
7da7cc1d 1898 mutex_lock(&sdata->local->mtx);
bc83b681 1899 ieee80211_recalc_idle(sdata->local);
7da7cc1d 1900 mutex_unlock(&sdata->local->mtx);
37ad3888 1901
77fdaa12 1902 return RX_MGMT_CFG80211_DISASSOC;
f0706e82
JB		 1903}
1904
c74d084f
CL		 1905static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
1906 u8 *supp_rates, unsigned int supp_rates_len,
1907 u32 *rates, u32 *basic_rates,
1908 bool *have_higher_than_11mbit,
1909 int *min_rate, int *min_rate_index)
1910{
1911 int i, j;
1912
1913 for (i = 0; i < supp_rates_len; i++) {
1914 int rate = (supp_rates[i] & 0x7f) * 5;
1915 bool is_basic = !!(supp_rates[i] & 0x80);
1916
1917 if (rate > 110)
1918 *have_higher_than_11mbit = true;
1919
1920 /*
1921 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
1922 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
1923 *
1924 * Note: Even through the membership selector and the basic
1925 * rate flag share the same bit, they are not exactly
1926 * the same.
1927 */
1928 if (!!(supp_rates[i] & 0x80) &&
1929 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1930 continue;
1931
1932 for (j = 0; j < sband->n_bitrates; j++) {
1933 if (sband->bitrates[j].bitrate == rate) {
1934 *rates |= BIT(j);
1935 if (is_basic)
1936 *basic_rates |= BIT(j);
1937 if (rate < *min_rate) {
1938 *min_rate = rate;
1939 *min_rate_index = j;
1940 }
1941 break;
1942 }
1943 }
1944 }
1945}
f0706e82 1946
66e67e41
JB		 1947static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
1948 bool assoc)
1949{
1950 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
1951
1952 lockdep_assert_held(&sdata->u.mgd.mtx);
1953
66e67e41
JB		 1954 if (!assoc) {
1955 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
1956
1957 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
1958 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
1959 }
1960
1961 kfree(assoc_data);
1962 sdata->u.mgd.assoc_data = NULL;
1963}
1964
1965static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
1966 struct cfg80211_bss *cbss,
af6b6374 1967 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1968{
46900298 1969 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 1970 struct ieee80211_local *local = sdata->local;
8318d78a 1971 struct ieee80211_supported_band *sband;
f0706e82 1972 struct sta_info *sta;
af6b6374 1973 u8 *pos;
af6b6374 1974 u16 capab_info, aid;
f0706e82 1975 struct ieee802_11_elems elems;
bda3933a 1976 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
ae5eb026 1977 u32 changed = 0;
c74d084f 1978 int err;
f0706e82 1979
af6b6374 1980 /* AssocResp and ReassocResp have identical structure */
f0706e82 1981
f0706e82 1982 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 1983 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 1984
1dd84aa2 1985 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
f0d23208
JP		 1986 pr_debug("%s: invalid AID value 0x%x; bits 15:14 not set\n",
1987 sdata->name, aid);
1dd84aa2
JB		 1988 aid &= ~(BIT(15) | BIT(14));
1989
05cb9108
JB		 1990 ifmgd->broken_ap = false;
1991
1992 if (aid == 0 || aid > IEEE80211_MAX_AID) {
f0d23208
JP		 1993 pr_debug("%s: invalid AID value %d (out of range), turn off PS\n",
1994 sdata->name, aid);
05cb9108
JB		 1995 aid = 0;
1996 ifmgd->broken_ap = true;
1997 }
1998
af6b6374
JB		 1999 pos = mgmt->u.assoc_resp.variable;
2000 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2001
f0706e82 2002 if (!elems.supp_rates) {
f0d23208
JP		 2003 pr_debug("%s: no SuppRates element in AssocResp\n",
2004 sdata->name);
af6b6374 2005 return false;
f0706e82
JB		 2006 }
2007
46900298 2008 ifmgd->aid = aid;
f0706e82 2009
2a33bee2
GE		 2010 mutex_lock(&sdata->local->sta_mtx);
2011 /*
2012 * station info was already allocated and inserted before
2013 * the association and should be available to us
2014 */
7852e361 2015 sta = sta_info_get(sdata, cbss->bssid);
2a33bee2
GE		 2016 if (WARN_ON(!sta)) {
2017 mutex_unlock(&sdata->local->sta_mtx);
af6b6374 2018 return false;
77fdaa12 2019 }
05e5e883 2020
66e67e41 2021 sband = local->hw.wiphy->bands[local->oper_channel->band];
f709fc69 2022
ab1faead 2023 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ef96a842 2024 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
d9fe60de 2025 elems.ht_cap_elem, &sta->sta.ht_cap);
ae5eb026 2026
64f68e5d
JB		 2027 sta->supports_40mhz =
2028 sta->sta.ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40;
2029
4b7679a5 2030 rate_control_rate_init(sta);
f0706e82 2031
46900298 2032 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
c2c98fde 2033 set_sta_flag(sta, WLAN_STA_MFP);
5394af4d 2034
ddf4ac53 2035 if (elems.wmm_param)
c2c98fde 2036 set_sta_flag(sta, WLAN_STA_WME);
ddf4ac53 2037
c8987876
JB		 2038 err = sta_info_move_state(sta, IEEE80211_STA_AUTH);
2039 if (!err)
2040 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
2041 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2042 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2043 if (err) {
f0d23208
JP		 2044 pr_debug("%s: failed to move station %pM to desired state\n",
2045 sdata->name, sta->sta.addr);
c8987876
JB		 2046 WARN_ON(__sta_info_destroy(sta));
2047 mutex_unlock(&sdata->local->sta_mtx);
2048 return false;
2049 }
2050
7852e361 2051 mutex_unlock(&sdata->local->sta_mtx);
ddf4ac53 2052
f2176d72
JO		 2053 /*
2054 * Always handle WMM once after association regardless
2055 * of the first value the AP uses. Setting -1 here has
2056 * that effect because the AP values is an unsigned
2057 * 4-bit value.
2058 */
2059 ifmgd->wmm_last_param_set = -1;
2060
ddf4ac53 2061 if (elems.wmm_param)
4ced3f74 2062 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 2063 elems.wmm_param_len);
aa837e1d 2064 else
3abead59
JB		 2065 ieee80211_set_wmm_default(sdata, false);
2066 changed |= BSS_CHANGED_QOS;
f0706e82 2067
074d46d1 2068 if (elems.ht_operation && elems.wmm_param &&
ab1faead 2069 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
24398e39
JB		 2070 changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation,
2071 cbss->bssid, false);
ae5eb026 2072
60f8b39c
JB		 2073 /* set AID and assoc capability,
2074 * ieee80211_set_associated() will tell the driver */
2075 bss_conf->aid = aid;
2076 bss_conf->assoc_capability = capab_info;
0c1ad2ca 2077 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 2078
d524215f
FF		 2079 /*
2080 * If we're using 4-addr mode, let the AP know that we're
2081 * doing so, so that it can create the STA VLAN on its side
2082 */
2083 if (ifmgd->use_4addr)
2084 ieee80211_send_4addr_nullfunc(local, sdata);
2085
15b7b062 2086 /*
b291ba11
JB		 2087 * Start timer to probe the connection to the AP now.
2088 * Also start the timer that will detect beacon loss.
15b7b062 2089 */
b291ba11 2090 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 2091 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 2092
af6b6374 2093 return true;
f0706e82
JB		 2094}
2095
66e67e41
JB		 2096static enum rx_mgmt_action __must_check
2097ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2098 struct ieee80211_mgmt *mgmt, size_t len,
2099 struct cfg80211_bss **bss)
2100{
2101 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2102 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2103 u16 capab_info, status_code, aid;
2104 struct ieee802_11_elems elems;
2105 u8 *pos;
2106 bool reassoc;
2107
2108 lockdep_assert_held(&ifmgd->mtx);
2109
2110 if (!assoc_data)
2111 return RX_MGMT_NONE;
b203ca39 2112 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
66e67e41
JB		 2113 return RX_MGMT_NONE;
2114
2115 /*
2116 * AssocResp and ReassocResp have identical structure, so process both
2117 * of them in this function.
2118 */
2119
2120 if (len < 24 + 6)
2121 return RX_MGMT_NONE;
2122
2123 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2124 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2125 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2126 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2127
f0d23208
JP		 2128 pr_debug("%s: RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2129 sdata->name, reassoc ? "Rea" : "A", mgmt->sa,
2130 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
66e67e41
JB		 2131
2132 pos = mgmt->u.assoc_resp.variable;
2133 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2134
2135 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
2136 elems.timeout_int && elems.timeout_int_len == 5 &&
2137 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
2138 u32 tu, ms;
2139 tu = get_unaligned_le32(elems.timeout_int + 1);
2140 ms = tu * 1024 / 1000;
f0d23208
JP		 2141 pr_debug("%s: %pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2142 sdata->name, mgmt->sa, tu, ms);
66e67e41
JB		 2143 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
2144 if (ms > IEEE80211_ASSOC_TIMEOUT)
2145 run_again(ifmgd, assoc_data->timeout);
2146 return RX_MGMT_NONE;
2147 }
2148
2149 *bss = assoc_data->bss;
2150
2151 if (status_code != WLAN_STATUS_SUCCESS) {
f0d23208
JP		 2152 pr_debug("%s: %pM denied association (code=%d)\n",
2153 sdata->name, mgmt->sa, status_code);
66e67e41
JB		 2154 ieee80211_destroy_assoc_data(sdata, false);
2155 } else {
f0d23208 2156 pr_debug("%s: associated\n", sdata->name);
66e67e41 2157
66e67e41
JB		 2158 if (!ieee80211_assoc_success(sdata, *bss, mgmt, len)) {
2159 /* oops -- internal error -- send timeout for now */
79ebfb85 2160 ieee80211_destroy_assoc_data(sdata, true);
66e67e41
JB		 2161 sta_info_destroy_addr(sdata, mgmt->bssid);
2162 cfg80211_put_bss(*bss);
2163 return RX_MGMT_CFG80211_ASSOC_TIMEOUT;
2164 }
79ebfb85
JB		 2165
2166 /*
2167 * destroy assoc_data afterwards, as otherwise an idle
2168 * recalc after assoc_data is NULL but before associated
2169 * is set can cause the interface to go idle
2170 */
2171 ieee80211_destroy_assoc_data(sdata, true);
66e67e41
JB		 2172 }
2173
2174 return RX_MGMT_CFG80211_RX_ASSOC;
2175}
98c8fccf
JB		 2176static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
2177 struct ieee80211_mgmt *mgmt,
2178 size_t len,
2179 struct ieee80211_rx_status *rx_status,
2180 struct ieee802_11_elems *elems,
2181 bool beacon)
2182{
2183 struct ieee80211_local *local = sdata->local;
2184 int freq;
c2b13452 2185 struct ieee80211_bss *bss;
98c8fccf 2186 struct ieee80211_channel *channel;
56007a02
JB		 2187 bool need_ps = false;
2188
66e67e41 2189 if (sdata->u.mgd.associated &&
b203ca39 2190 ether_addr_equal(mgmt->bssid, sdata->u.mgd.associated->bssid)) {
56007a02
JB		 2191 bss = (void *)sdata->u.mgd.associated->priv;
2192 /* not previously set so we may need to recalc */
2193 need_ps = !bss->dtim_period;
2194 }
98c8fccf
JB		 2195
2196 if (elems->ds_params && elems->ds_params_len == 1)
59eb21a6
BR		 2197 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
2198 rx_status->band);
98c8fccf
JB		 2199 else
2200 freq = rx_status->freq;
2201
2202 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2203
2204 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2205 return;
2206
98c8fccf 2207 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2a519311 2208 channel, beacon);
77fdaa12
JB		 2209 if (bss)
2210 ieee80211_rx_bss_put(local, bss);
2211
2212 if (!sdata->u.mgd.associated)
98c8fccf
JB		 2213 return;
2214
56007a02
JB		 2215 if (need_ps) {
2216 mutex_lock(&local->iflist_mtx);
2217 ieee80211_recalc_ps(local, -1);
2218 mutex_unlock(&local->iflist_mtx);
2219 }
2220
c481ec97 2221 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
0c1ad2ca 2222 (memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid,
77fdaa12 2223 ETH_ALEN) == 0)) {
c481ec97
S		 2224 struct ieee80211_channel_sw_ie *sw_elem =
2225 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
5ce6e438
JB		 2226 ieee80211_sta_process_chanswitch(sdata, sw_elem,
2227 bss, rx_status->mactime);
c481ec97 2228 }
f0706e82
JB		 2229}
2230
2231
f698d856 2232static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 2233 struct sk_buff *skb)
f0706e82 2234{
af6b6374 2235 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 2236 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 2237 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2238 size_t baselen, len = skb->len;
ae6a44e3
EK		 2239 struct ieee802_11_elems elems;
2240
15b7b062
KV		 2241 ifmgd = &sdata->u.mgd;
2242
77fdaa12
JB		 2243 ASSERT_MGD_MTX(ifmgd);
2244
b203ca39 2245 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
8e7cdbb6
TW		 2246 return; /* ignore ProbeResp to foreign address */
2247
ae6a44e3
EK		 2248 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2249 if (baselen > len)
2250 return;
2251
2252 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2253 &elems);
2254
98c8fccf 2255 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
9859b81e 2256
77fdaa12 2257 if (ifmgd->associated &&
b203ca39 2258 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
4e5ff376 2259 ieee80211_reset_ap_probe(sdata);
66e67e41
JB		 2260
2261 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
b203ca39 2262 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
66e67e41 2263 /* got probe response, continue with auth */
f0d23208 2264 pr_debug("%s: direct probe responded\n", sdata->name);
66e67e41
JB		 2265 ifmgd->auth_data->tries = 0;
2266 ifmgd->auth_data->timeout = jiffies;
2267 run_again(ifmgd, ifmgd->auth_data->timeout);
2268 }
f0706e82
JB		 2269}
2270
d91f36db
JB		 2271/*
2272 * This is the canonical list of information elements we care about,
2273 * the filter code also gives us all changes to the Microsoft OUI
2274 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2275 *
2276 * We implement beacon filtering in software since that means we can
2277 * avoid processing the frame here and in cfg80211, and userspace
2278 * will not be able to tell whether the hardware supports it or not.
2279 *
2280 * XXX: This list needs to be dynamic -- userspace needs to be able to
2281 * add items it requires. It also needs to be able to tell us to
2282 * look out for other vendor IEs.
2283 */
2284static const u64 care_about_ies =
1d4df3a5
JB		 2285 (1ULL << WLAN_EID_COUNTRY) |
2286 (1ULL << WLAN_EID_ERP_INFO) |
2287 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2288 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2289 (1ULL << WLAN_EID_HT_CAPABILITY) |
074d46d1 2290 (1ULL << WLAN_EID_HT_OPERATION);
d91f36db 2291
f698d856 2292static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2293 struct ieee80211_mgmt *mgmt,
2294 size_t len,
2295 struct ieee80211_rx_status *rx_status)
2296{
d91f36db 2297 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 2298 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 2299 size_t baselen;
2300 struct ieee802_11_elems elems;
f698d856 2301 struct ieee80211_local *local = sdata->local;
471b3efd 2302 u32 changed = 0;
d91f36db 2303 bool erp_valid, directed_tim = false;
7a5158ef 2304 u8 erp_value = 0;
d91f36db 2305 u32 ncrc;
77fdaa12
JB		 2306 u8 *bssid;
2307
66e67e41 2308 lockdep_assert_held(&ifmgd->mtx);
f0706e82 2309
ae6a44e3
EK		 2310 /* Process beacon from the current BSS */
2311 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2312 if (baselen > len)
2313 return;
2314
d91f36db 2315 if (rx_status->freq != local->hw.conf.channel->center_freq)
f0706e82 2316 return;
f0706e82 2317
66e67e41 2318 if (ifmgd->assoc_data && !ifmgd->assoc_data->have_beacon &&
b203ca39 2319 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
66e67e41
JB		 2320 ieee802_11_parse_elems(mgmt->u.beacon.variable,
2321 len - baselen, &elems);
77fdaa12 2322
66e67e41
JB		 2323 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
2324 false);
2325 ifmgd->assoc_data->have_beacon = true;
2326 ifmgd->assoc_data->sent_assoc = false;
2327 /* continue assoc process */
2328 ifmgd->assoc_data->timeout = jiffies;
2329 run_again(ifmgd, ifmgd->assoc_data->timeout);
2330 return;
2331 }
77fdaa12 2332
66e67e41 2333 if (!ifmgd->associated ||
b203ca39 2334 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
f0706e82 2335 return;
66e67e41 2336 bssid = ifmgd->associated->bssid;
f0706e82 2337
17e4ec14
JM		 2338 /* Track average RSSI from the Beacon frames of the current AP */
2339 ifmgd->last_beacon_signal = rx_status->signal;
2340 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
2341 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3ba06c6f 2342 ifmgd->ave_beacon_signal = rx_status->signal * 16;
17e4ec14 2343 ifmgd->last_cqm_event_signal = 0;
391a200a 2344 ifmgd->count_beacon_signal = 1;
615f7b9b 2345 ifmgd->last_ave_beacon_signal = 0;
17e4ec14
JM		 2346 } else {
2347 ifmgd->ave_beacon_signal =
2348 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
2349 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
2350 ifmgd->ave_beacon_signal) / 16;
391a200a 2351 ifmgd->count_beacon_signal++;
17e4ec14 2352 }
615f7b9b
MV		 2353
2354 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
2355 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
2356 int sig = ifmgd->ave_beacon_signal;
2357 int last_sig = ifmgd->last_ave_beacon_signal;
2358
2359 /*
2360 * if signal crosses either of the boundaries, invoke callback
2361 * with appropriate parameters
2362 */
2363 if (sig > ifmgd->rssi_max_thold &&
2364 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
2365 ifmgd->last_ave_beacon_signal = sig;
2366 drv_rssi_callback(local, RSSI_EVENT_HIGH);
2367 } else if (sig < ifmgd->rssi_min_thold &&
2368 (last_sig >= ifmgd->rssi_max_thold ||
2369 last_sig == 0)) {
2370 ifmgd->last_ave_beacon_signal = sig;
2371 drv_rssi_callback(local, RSSI_EVENT_LOW);
2372 }
2373 }
2374
17e4ec14 2375 if (bss_conf->cqm_rssi_thold &&
391a200a 2376 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
ea086359 2377 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
17e4ec14
JM		 2378 int sig = ifmgd->ave_beacon_signal / 16;
2379 int last_event = ifmgd->last_cqm_event_signal;
2380 int thold = bss_conf->cqm_rssi_thold;
2381 int hyst = bss_conf->cqm_rssi_hyst;
2382 if (sig < thold &&
2383 (last_event == 0 || sig < last_event - hyst)) {
2384 ifmgd->last_cqm_event_signal = sig;
2385 ieee80211_cqm_rssi_notify(
2386 &sdata->vif,
2387 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
2388 GFP_KERNEL);
2389 } else if (sig > thold &&
2390 (last_event == 0 || sig > last_event + hyst)) {
2391 ifmgd->last_cqm_event_signal = sig;
2392 ieee80211_cqm_rssi_notify(
2393 &sdata->vif,
2394 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
2395 GFP_KERNEL);
2396 }
2397 }
2398
b291ba11 2399 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
92778180 2400#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
e87cc472
JP		 2401 net_dbg_ratelimited("%s: cancelling probereq poll due to a received beacon\n",
2402 sdata->name);
92778180 2403#endif
925e64c3 2404 mutex_lock(&local->mtx);
b291ba11 2405 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
925e64c3
SG		 2406 ieee80211_run_deferred_scan(local);
2407 mutex_unlock(&local->mtx);
2408
4e751843
JB		 2409 mutex_lock(&local->iflist_mtx);
2410 ieee80211_recalc_ps(local, -1);
2411 mutex_unlock(&local->iflist_mtx);
92778180
JM		 2412 }
2413
b291ba11
JB		 2414 /*
2415 * Push the beacon loss detection into the future since
2416 * we are processing a beacon from the AP just now.
2417 */
d3a910a8 2418 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 2419
d91f36db
JB		 2420 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
2421 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
2422 len - baselen, &elems,
2423 care_about_ies, ncrc);
2424
2425 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
e7ec86f5
JB		 2426 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
2427 ifmgd->aid);
d91f36db 2428
d8ec4433 2429 if (ncrc != ifmgd->beacon_crc || !ifmgd->beacon_crc_valid) {
30196673
JM		 2430 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
2431 true);
d91f36db 2432
4ced3f74 2433 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
30196673
JM		 2434 elems.wmm_param_len);
2435 }
fe3fa827 2436
25c9c875 2437 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1fb3606b 2438 if (directed_tim) {
572e0012 2439 if (local->hw.conf.dynamic_ps_timeout > 0) {
70b12f26
RW		 2440 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2441 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2442 ieee80211_hw_config(local,
2443 IEEE80211_CONF_CHANGE_PS);
2444 }
572e0012 2445 ieee80211_send_nullfunc(local, sdata, 0);
6f0756a3 2446 } else if (!local->pspolling && sdata->u.mgd.powersave) {
572e0012
KV		 2447 local->pspolling = true;
2448
2449 /*
2450 * Here is assumed that the driver will be
2451 * able to send ps-poll frame and receive a
2452 * response even though power save mode is
2453 * enabled, but some drivers might require
2454 * to disable power save here. This needs
2455 * to be investigated.
2456 */
2457 ieee80211_send_pspoll(local, sdata);
2458 }
a97b77b9
VN		 2459 }
2460 }
7a5158ef 2461
d8ec4433 2462 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
30196673
JM		 2463 return;
2464 ifmgd->beacon_crc = ncrc;
d8ec4433 2465 ifmgd->beacon_crc_valid = true;
30196673 2466
7a5158ef
JB		 2467 if (elems.erp_info && elems.erp_info_len >= 1) {
2468 erp_valid = true;
2469 erp_value = elems.erp_info[0];
2470 } else {
2471 erp_valid = false;
50c4afb9 2472 }
7a5158ef
JB		 2473 changed |= ieee80211_handle_bss_capability(sdata,
2474 le16_to_cpu(mgmt->u.beacon.capab_info),
2475 erp_valid, erp_value);
f0706e82 2476
d3c990fb 2477
074d46d1 2478 if (elems.ht_cap_elem && elems.ht_operation && elems.wmm_param &&
ab1faead 2479 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
ae5eb026 2480 struct ieee80211_supported_band *sband;
ae5eb026
JB		 2481
2482 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2483
24398e39
JB		 2484 changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation,
2485 bssid, true);
d3c990fb
RR		 2486 }
2487
8b19e6ca 2488 /* Note: country IE parsing is done for us by cfg80211 */
3f2355cb 2489 if (elems.country_elem) {
a8302de9
VT		 2490 /* TODO: IBSS also needs this */
2491 if (elems.pwr_constr_elem)
2492 ieee80211_handle_pwr_constr(sdata,
2493 le16_to_cpu(mgmt->u.probe_resp.capab_info),
2494 elems.pwr_constr_elem,
2495 elems.pwr_constr_elem_len);
3f2355cb
LR		 2496 }
2497
471b3efd 2498 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 2499}
2500
1fa57d01
JB		 2501void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
2502 struct sk_buff *skb)
f0706e82 2503{
77fdaa12 2504 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 2505 struct ieee80211_rx_status *rx_status;
f0706e82 2506 struct ieee80211_mgmt *mgmt;
66e67e41 2507 struct cfg80211_bss *bss = NULL;
77fdaa12 2508 enum rx_mgmt_action rma = RX_MGMT_NONE;
f0706e82
JB		 2509 u16 fc;
2510
f0706e82
JB		 2511 rx_status = (struct ieee80211_rx_status *) skb->cb;
2512 mgmt = (struct ieee80211_mgmt *) skb->data;
2513 fc = le16_to_cpu(mgmt->frame_control);
2514
77fdaa12
JB		 2515 mutex_lock(&ifmgd->mtx);
2516
66e67e41
JB		 2517 switch (fc & IEEE80211_FCTL_STYPE) {
2518 case IEEE80211_STYPE_BEACON:
2519 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
2520 break;
2521 case IEEE80211_STYPE_PROBE_RESP:
2522 ieee80211_rx_mgmt_probe_resp(sdata, skb);
2523 break;
2524 case IEEE80211_STYPE_AUTH:
2525 rma = ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
2526 break;
2527 case IEEE80211_STYPE_DEAUTH:
2528 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
2529 break;
2530 case IEEE80211_STYPE_DISASSOC:
2531 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
2532 break;
2533 case IEEE80211_STYPE_ASSOC_RESP:
2534 case IEEE80211_STYPE_REASSOC_RESP:
2535 rma = ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, &bss);
2536 break;
2537 case IEEE80211_STYPE_ACTION:
2538 switch (mgmt->u.action.category) {
2539 case WLAN_CATEGORY_SPECTRUM_MGMT:
2540 ieee80211_sta_process_chanswitch(sdata,
2541 &mgmt->u.action.u.chan_switch.sw_elem,
2542 (void *)ifmgd->associated->priv,
2543 rx_status->mactime);
77fdaa12 2544 break;
77fdaa12 2545 }
77fdaa12 2546 }
77fdaa12
JB		 2547 mutex_unlock(&ifmgd->mtx);
2548
66e67e41
JB		 2549 switch (rma) {
2550 case RX_MGMT_NONE:
2551 /* no action */
2552 break;
2553 case RX_MGMT_CFG80211_DEAUTH:
ce470613 2554 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
66e67e41
JB		 2555 break;
2556 case RX_MGMT_CFG80211_DISASSOC:
2557 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
2558 break;
2559 case RX_MGMT_CFG80211_RX_AUTH:
2560 cfg80211_send_rx_auth(sdata->dev, (u8 *)mgmt, skb->len);
2561 break;
2562 case RX_MGMT_CFG80211_RX_ASSOC:
2563 cfg80211_send_rx_assoc(sdata->dev, bss, (u8 *)mgmt, skb->len);
2564 break;
2565 case RX_MGMT_CFG80211_ASSOC_TIMEOUT:
2566 cfg80211_send_assoc_timeout(sdata->dev, mgmt->bssid);
2567 break;
2568 default:
2569 WARN(1, "unexpected: %d", rma);
b054b747 2570 }
f0706e82
JB		 2571}
2572
9c6bd790 2573static void ieee80211_sta_timer(unsigned long data)
f0706e82 2574{
60f8b39c
JB		 2575 struct ieee80211_sub_if_data *sdata =
2576 (struct ieee80211_sub_if_data *) data;
46900298 2577 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
60f8b39c 2578 struct ieee80211_local *local = sdata->local;
f0706e82 2579
5bb644a0
JB		 2580 if (local->quiescing) {
2581 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2582 return;
2583 }
2584
64592c8f 2585 ieee80211_queue_work(&local->hw, &sdata->work);
f0706e82
JB		 2586}
2587
04ac3c0e 2588static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
95acac61 2589 u8 *bssid, u8 reason)
04ac3c0e
FF		 2590{
2591 struct ieee80211_local *local = sdata->local;
2592 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5fef7dbc 2593 u8 frame_buf[DEAUTH_DISASSOC_LEN];
04ac3c0e 2594
925e64c3 2595 ieee80211_stop_poll(sdata);
04ac3c0e 2596
37ad3888
JB		 2597 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
2598 false, frame_buf);
04ac3c0e 2599 mutex_unlock(&ifmgd->mtx);
37ad3888 2600
04ac3c0e
FF		 2601 /*
2602 * must be outside lock due to cfg80211,
2603 * but that's not a problem.
2604 */
5fef7dbc 2605 cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
fcac4fb0
FF		 2606
2607 mutex_lock(&local->mtx);
2608 ieee80211_recalc_idle(local);
2609 mutex_unlock(&local->mtx);
2610
04ac3c0e
FF		 2611 mutex_lock(&ifmgd->mtx);
2612}
2613
66e67e41
JB		 2614static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
2615{
2616 struct ieee80211_local *local = sdata->local;
2617 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2618 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
2619
2620 lockdep_assert_held(&ifmgd->mtx);
2621
2622 if (WARN_ON_ONCE(!auth_data))
2623 return -EINVAL;
2624
66e67e41
JB		 2625 auth_data->tries++;
2626
2627 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
f0d23208
JP		 2628 pr_debug("%s: authentication with %pM timed out\n",
2629 sdata->name, auth_data->bss->bssid);
66e67e41
JB		 2630
2631 /*
2632 * Most likely AP is not in the range so remove the
2633 * bss struct for that AP.
2634 */
2635 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
2636
2637 return -ETIMEDOUT;
2638 }
2639
2640 if (auth_data->bss->proberesp_ies) {
f0d23208
JP		 2641 pr_debug("%s: send auth to %pM (try %d/%d)\n",
2642 sdata->name, auth_data->bss->bssid, auth_data->tries,
2643 IEEE80211_AUTH_MAX_TRIES);
66e67e41
JB		 2644
2645 auth_data->expected_transaction = 2;
2646 ieee80211_send_auth(sdata, 1, auth_data->algorithm,
2647 auth_data->ie, auth_data->ie_len,
2648 auth_data->bss->bssid,
2649 auth_data->bss->bssid, NULL, 0, 0);
2650 } else {
2651 const u8 *ssidie;
2652
f0d23208
JP		 2653 pr_debug("%s: direct probe to %pM (try %d/%i)\n",
2654 sdata->name, auth_data->bss->bssid, auth_data->tries,
2655 IEEE80211_AUTH_MAX_TRIES);
66e67e41
JB		 2656
2657 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
2658 if (!ssidie)
2659 return -EINVAL;
2660 /*
2661 * Direct probe is sent to broadcast address as some APs
2662 * will not answer to direct packet in unassociated state.
2663 */
2664 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
2665 NULL, 0, (u32) -1, true, false);
2666 }
2667
2668 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
2669 run_again(ifmgd, auth_data->timeout);
2670
2671 return 0;
2672}
2673
2674static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
2675{
2676 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2677 struct ieee80211_local *local = sdata->local;
2678
2679 lockdep_assert_held(&sdata->u.mgd.mtx);
2680
66e67e41
JB		 2681 assoc_data->tries++;
2682 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
f0d23208
JP		 2683 pr_debug("%s: association with %pM timed out\n",
2684 sdata->name, assoc_data->bss->bssid);
66e67e41
JB		 2685
2686 /*
2687 * Most likely AP is not in the range so remove the
2688 * bss struct for that AP.
2689 */
2690 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
2691
2692 return -ETIMEDOUT;
2693 }
2694
f0d23208
JP		 2695 pr_debug("%s: associate with %pM (try %d/%d)\n",
2696 sdata->name, assoc_data->bss->bssid, assoc_data->tries,
2697 IEEE80211_ASSOC_MAX_TRIES);
66e67e41
JB		 2698 ieee80211_send_assoc(sdata);
2699
2700 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
2701 run_again(&sdata->u.mgd, assoc_data->timeout);
2702
2703 return 0;
2704}
2705
1fa57d01 2706void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 2707{
9c6bd790 2708 struct ieee80211_local *local = sdata->local;
1fa57d01 2709 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 2710
77fdaa12
JB		 2711 mutex_lock(&ifmgd->mtx);
2712
66e67e41
JB		 2713 if (ifmgd->auth_data &&
2714 time_after(jiffies, ifmgd->auth_data->timeout)) {
2715 if (ifmgd->auth_data->done) {
2716 /*
2717 * ok ... we waited for assoc but userspace didn't,
2718 * so let's just kill the auth data
2719 */
2720 ieee80211_destroy_auth_data(sdata, false);
2721 } else if (ieee80211_probe_auth(sdata)) {
2722 u8 bssid[ETH_ALEN];
2723
2724 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2725
2726 ieee80211_destroy_auth_data(sdata, false);
2727
2728 mutex_unlock(&ifmgd->mtx);
2729 cfg80211_send_auth_timeout(sdata->dev, bssid);
2730 mutex_lock(&ifmgd->mtx);
2731 }
2732 } else if (ifmgd->auth_data)
2733 run_again(ifmgd, ifmgd->auth_data->timeout);
2734
2735 if (ifmgd->assoc_data &&
2736 time_after(jiffies, ifmgd->assoc_data->timeout)) {
2737 if (!ifmgd->assoc_data->have_beacon ||
2738 ieee80211_do_assoc(sdata)) {
2739 u8 bssid[ETH_ALEN];
2740
2741 memcpy(bssid, ifmgd->assoc_data->bss->bssid, ETH_ALEN);
2742
2743 ieee80211_destroy_assoc_data(sdata, false);
2744
2745 mutex_unlock(&ifmgd->mtx);
2746 cfg80211_send_assoc_timeout(sdata->dev, bssid);
2747 mutex_lock(&ifmgd->mtx);
2748 }
2749 } else if (ifmgd->assoc_data)
2750 run_again(ifmgd, ifmgd->assoc_data->timeout);
2751
b291ba11
JB		 2752 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2753 IEEE80211_STA_CONNECTION_POLL) &&
2754 ifmgd->associated) {
a43abf29 2755 u8 bssid[ETH_ALEN];
72a8a3ed 2756 int max_tries;
a43abf29 2757
0c1ad2ca 2758 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 2759
72a8a3ed 2760 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
180205bd 2761 max_tries = max_nullfunc_tries;
72a8a3ed 2762 else
180205bd 2763 max_tries = max_probe_tries;
72a8a3ed 2764
4e5ff376
FF		 2765 /* ACK received for nullfunc probing frame */
2766 if (!ifmgd->probe_send_count)
2767 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 2768 else if (ifmgd->nullfunc_failed) {
2769 if (ifmgd->probe_send_count < max_tries) {
2770#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2771 wiphy_debug(local->hw.wiphy,
2772 "%s: No ack for nullfunc frame to"
bfc31df3 2773 " AP %pM, try %d/%i\n",
04ac3c0e 2774 sdata->name, bssid,
bfc31df3 2775 ifmgd->probe_send_count, max_tries);
04ac3c0e
FF		 2776#endif
2777 ieee80211_mgd_probe_ap_send(sdata);
2778 } else {
2779#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2780 wiphy_debug(local->hw.wiphy,
2781 "%s: No ack for nullfunc frame to"
2782 " AP %pM, disconnecting.\n",
c658e5db 2783 sdata->name, bssid);
04ac3c0e 2784#endif
95acac61
JB		 2785 ieee80211_sta_connection_lost(sdata, bssid,
2786 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
04ac3c0e
FF		 2787 }
2788 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
b291ba11 2789 run_again(ifmgd, ifmgd->probe_timeout);
04ac3c0e
FF		 2790 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2791#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2792 wiphy_debug(local->hw.wiphy,
2793 "%s: Failed to send nullfunc to AP %pM"
2794 " after %dms, disconnecting.\n",
2795 sdata->name,
180205bd 2796 bssid, probe_wait_ms);
04ac3c0e 2797#endif
95acac61
JB		 2798 ieee80211_sta_connection_lost(sdata, bssid,
2799 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
04ac3c0e 2800 } else if (ifmgd->probe_send_count < max_tries) {
a43abf29 2801#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
b38afa87
BG		 2802 wiphy_debug(local->hw.wiphy,
2803 "%s: No probe response from AP %pM"
bfc31df3 2804 " after %dms, try %d/%i\n",
b38afa87 2805 sdata->name,
180205bd 2806 bssid, probe_wait_ms,
bfc31df3 2807 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 2808#endif
2809 ieee80211_mgd_probe_ap_send(sdata);
2810 } else {
b291ba11
JB		 2811 /*
2812 * We actually lost the connection ... or did we?
2813 * Let's make sure!
2814 */
b38afa87
BG		 2815 wiphy_debug(local->hw.wiphy,
2816 "%s: No probe response from AP %pM"
2817 " after %dms, disconnecting.\n",
2818 sdata->name,
180205bd 2819 bssid, probe_wait_ms);
04ac3c0e 2820
95acac61
JB		 2821 ieee80211_sta_connection_lost(sdata, bssid,
2822 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
b291ba11
JB		 2823 }
2824 }
2825
77fdaa12 2826 mutex_unlock(&ifmgd->mtx);
66e67e41
JB		 2827
2828 mutex_lock(&local->mtx);
2829 ieee80211_recalc_idle(local);
2830 mutex_unlock(&local->mtx);
f0706e82
JB		 2831}
2832
b291ba11
JB		 2833static void ieee80211_sta_bcn_mon_timer(unsigned long data)
2834{
2835 struct ieee80211_sub_if_data *sdata =
2836 (struct ieee80211_sub_if_data *) data;
2837 struct ieee80211_local *local = sdata->local;
2838
2839 if (local->quiescing)
2840 return;
2841
1e4dcd01
JO		 2842 ieee80211_queue_work(&sdata->local->hw,
2843 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 2844}
2845
2846static void ieee80211_sta_conn_mon_timer(unsigned long data)
2847{
2848 struct ieee80211_sub_if_data *sdata =
2849 (struct ieee80211_sub_if_data *) data;
2850 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2851 struct ieee80211_local *local = sdata->local;
2852
2853 if (local->quiescing)
2854 return;
2855
42935eca 2856 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 2857}
2858
2859static void ieee80211_sta_monitor_work(struct work_struct *work)
2860{
2861 struct ieee80211_sub_if_data *sdata =
2862 container_of(work, struct ieee80211_sub_if_data,
2863 u.mgd.monitor_work);
2864
2865 ieee80211_mgd_probe_ap(sdata, false);
2866}
2867
9c6bd790
JB		 2868static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2869{
494f1fe5
EP		 2870 u32 flags;
2871
ad935687 2872 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
925e64c3 2873 __ieee80211_stop_poll(sdata);
ad935687 2874
b291ba11 2875 /* let's probe the connection once */
494f1fe5
EP		 2876 flags = sdata->local->hw.flags;
2877 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
2878 ieee80211_queue_work(&sdata->local->hw,
2879 &sdata->u.mgd.monitor_work);
b291ba11 2880 /* and do all the other regular work too */
64592c8f 2881 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 2882 }
9c6bd790 2883}
f0706e82 2884
5bb644a0
JB		 2885#ifdef CONFIG_PM
2886void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
2887{
2888 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2889
2890 /*
2891 * we need to use atomic bitops for the running bits
2892 * only because both timers might fire at the same
2893 * time -- the code here is properly synchronised.
2894 */
2895
d1f5b7a3
JB		 2896 cancel_work_sync(&ifmgd->request_smps_work);
2897
0ecfe806 2898 cancel_work_sync(&ifmgd->monitor_work);
1e4dcd01 2899 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5bb644a0
JB		 2900 if (del_timer_sync(&ifmgd->timer))
2901 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2902
2903 cancel_work_sync(&ifmgd->chswitch_work);
2904 if (del_timer_sync(&ifmgd->chswitch_timer))
2905 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
b291ba11 2906
b291ba11
JB		 2907 /* these will just be re-established on connection */
2908 del_timer_sync(&ifmgd->conn_mon_timer);
2909 del_timer_sync(&ifmgd->bcn_mon_timer);
5bb644a0
JB		 2910}
2911
2912void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
2913{
2914 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2915
676b58c2
RM		 2916 if (!ifmgd->associated)
2917 return;
2918
95acac61
JB		 2919 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
2920 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
2921 mutex_lock(&ifmgd->mtx);
2922 if (ifmgd->associated) {
2923#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2924 wiphy_debug(sdata->local->hw.wiphy,
2925 "%s: driver requested disconnect after resume.\n",
2926 sdata->name);
2927#endif
2928 ieee80211_sta_connection_lost(sdata,
2929 ifmgd->associated->bssid,
2930 WLAN_REASON_UNSPECIFIED);
2931 mutex_unlock(&ifmgd->mtx);
2932 return;
2933 }
2934 mutex_unlock(&ifmgd->mtx);
2935 }
2936
5bb644a0
JB		 2937 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
2938 add_timer(&ifmgd->timer);
2939 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
2940 add_timer(&ifmgd->chswitch_timer);
c8a7972c 2941 ieee80211_sta_reset_beacon_monitor(sdata);
925e64c3
SG		 2942
2943 mutex_lock(&sdata->local->mtx);
46090979 2944 ieee80211_restart_sta_timer(sdata);
925e64c3 2945 mutex_unlock(&sdata->local->mtx);
5bb644a0
JB		 2946}
2947#endif
2948
9c6bd790
JB		 2949/* interface setup */
2950void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 2951{
46900298 2952 struct ieee80211_if_managed *ifmgd;
988c0f72 2953
46900298 2954 ifmgd = &sdata->u.mgd;
b291ba11 2955 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 2956 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 2957 INIT_WORK(&ifmgd->beacon_connection_loss_work,
2958 ieee80211_beacon_connection_loss_work);
d1f5b7a3 2959 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
46900298 2960 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 2961 (unsigned long) sdata);
b291ba11
JB		 2962 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
2963 (unsigned long) sdata);
2964 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
2965 (unsigned long) sdata);
46900298 2966 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 2967 (unsigned long) sdata);
9c6bd790 2968
ab1faead 2969 ifmgd->flags = 0;
1478acb3 2970 ifmgd->powersave = sdata->wdev.ps;
dc41e4d4
EP		 2971 ifmgd->uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
2972 ifmgd->uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
bbbdff9e 2973
77fdaa12 2974 mutex_init(&ifmgd->mtx);
0f78231b
JB		 2975
2976 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
2977 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
2978 else
2979 ifmgd->req_smps = IEEE80211_SMPS_OFF;
f0706e82
JB		 2980}
2981
77fdaa12
JB		 2982/* scan finished notification */
2983void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 2984{
77fdaa12 2985 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
60f8b39c 2986
77fdaa12
JB		 2987 /* Restart STA timers */
2988 rcu_read_lock();
2989 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2990 ieee80211_restart_sta_timer(sdata);
2991 rcu_read_unlock();
2992}
60f8b39c 2993
77fdaa12
JB		 2994int ieee80211_max_network_latency(struct notifier_block *nb,
2995 unsigned long data, void *dummy)
2996{
2997 s32 latency_usec = (s32) data;
2998 struct ieee80211_local *local =
2999 container_of(nb, struct ieee80211_local,
3000 network_latency_notifier);
1fa6f4af 3001
77fdaa12
JB		 3002 mutex_lock(&local->iflist_mtx);
3003 ieee80211_recalc_ps(local, latency_usec);
3004 mutex_unlock(&local->iflist_mtx);
dfe67012 3005
77fdaa12 3006 return 0;
9c6bd790
JB		 3007}
3008
a1cf775d 3009static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
5d6a1b06 3010 struct cfg80211_bss *cbss, bool assoc)
a1cf775d
JB		 3011{
3012 struct ieee80211_local *local = sdata->local;
3013 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5d6a1b06 3014 struct ieee80211_bss *bss = (void *)cbss->priv;
6df653c7 3015 struct sta_info *sta = NULL;
a1cf775d
JB		 3016 bool have_sta = false;
3017 int err;
24398e39
JB		 3018 int ht_cfreq;
3019 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
3020 const u8 *ht_oper_ie;
3021 const struct ieee80211_ht_operation *ht_oper = NULL;
3022 struct ieee80211_supported_band *sband;
a1cf775d
JB		 3023
3024 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3025 return -EINVAL;
3026
3027 if (assoc) {
3028 rcu_read_lock();
5d6a1b06 3029 have_sta = sta_info_get(sdata, cbss->bssid);
a1cf775d
JB		 3030 rcu_read_unlock();
3031 }
3032
3033 if (!have_sta) {
5d6a1b06 3034 sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
a1cf775d
JB		 3035 if (!sta)
3036 return -ENOMEM;
3037 }
3038
3039 mutex_lock(&local->mtx);
3040 ieee80211_recalc_idle(sdata->local);
3041 mutex_unlock(&local->mtx);
3042
3043 /* switch to the right channel */
24398e39
JB		 3044 sband = local->hw.wiphy->bands[cbss->channel->band];
3045
3046 ifmgd->flags &= ~IEEE80211_STA_DISABLE_40MHZ;
3047
3048 if (sband->ht_cap.ht_supported) {
3049 ht_oper_ie = cfg80211_find_ie(WLAN_EID_HT_OPERATION,
3050 cbss->information_elements,
3051 cbss->len_information_elements);
3052 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3053 ht_oper = (void *)(ht_oper_ie + 2);
3054 }
3055
3056 if (ht_oper) {
3057 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
3058 cbss->channel->band);
3059 /* check that channel matches the right operating channel */
3060 if (cbss->channel->center_freq != ht_cfreq) {
3061 /*
3062 * It's possible that some APs are confused here;
3063 * Netgear WNDR3700 sometimes reports 4 higher than
3064 * the actual channel in association responses, but
3065 * since we look at probe response/beacon data here
3066 * it should be OK.
3067 */
f0d23208
JP		 3068 pr_debug("%s: Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
3069 sdata->name, cbss->channel->center_freq,
3070 ht_cfreq, ht_oper->primary_chan,
3071 cbss->channel->band);
24398e39
JB		 3072 ht_oper = NULL;
3073 }
3074 }
3075
3076 if (ht_oper) {
3077 channel_type = NL80211_CHAN_HT20;
3078
3079 if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
3080 switch (ht_oper->ht_param &
3081 IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
3082 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3083 channel_type = NL80211_CHAN_HT40PLUS;
3084 break;
3085 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3086 channel_type = NL80211_CHAN_HT40MINUS;
3087 break;
3088 }
3089 }
3090 }
3091
3092 if (!ieee80211_set_channel_type(local, sdata, channel_type)) {
3093 /* can only fail due to HT40+/- mismatch */
3094 channel_type = NL80211_CHAN_HT20;
f0d23208
JP		 3095 pr_debug("%s: disabling 40 MHz due to multi-vif mismatch\n",
3096 sdata->name);
24398e39
JB		 3097 ifmgd->flags |= IEEE80211_STA_DISABLE_40MHZ;
3098 WARN_ON(!ieee80211_set_channel_type(local, sdata,
3099 channel_type));
3100 }
3101
5d6a1b06 3102 local->oper_channel = cbss->channel;
24398e39 3103 ieee80211_hw_config(local, 0);
a1cf775d 3104
6df653c7 3105 if (sta) {
5d6a1b06
JB		 3106 u32 rates = 0, basic_rates = 0;
3107 bool have_higher_than_11mbit;
3108 int min_rate = INT_MAX, min_rate_index = -1;
3109
5d6a1b06
JB		 3110 ieee80211_get_rates(sband, bss->supp_rates,
3111 bss->supp_rates_len,
3112 &rates, &basic_rates,
3113 &have_higher_than_11mbit,
3114 &min_rate, &min_rate_index);
3115
3116 /*
3117 * This used to be a workaround for basic rates missing
3118 * in the association response frame. Now that we no
3119 * longer use the basic rates from there, it probably
3120 * doesn't happen any more, but keep the workaround so
3121 * in case some *other* APs are buggy in different ways
3122 * we can connect -- with a warning.
3123 */
3124 if (!basic_rates && min_rate_index >= 0) {
f0d23208
JP		 3125 pr_debug("%s: No basic rates, using min rate instead\n",
3126 sdata->name);
5d6a1b06
JB		 3127 basic_rates = BIT(min_rate_index);
3128 }
3129
3130 sta->sta.supp_rates[cbss->channel->band] = rates;
3131 sdata->vif.bss_conf.basic_rates = basic_rates;
3132
3133 /* cf. IEEE 802.11 9.2.12 */
3134 if (local->oper_channel->band == IEEE80211_BAND_2GHZ &&
3135 have_higher_than_11mbit)
3136 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3137 else
3138 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
3139
3140 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
3141
3142 /* tell driver about BSSID and basic rates */
3143 ieee80211_bss_info_change_notify(sdata,
3144 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES);
a1cf775d
JB		 3145
3146 if (assoc)
3147 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
3148
3149 err = sta_info_insert(sta);
3150 sta = NULL;
3151 if (err) {
f0d23208
JP		 3152 pr_debug("%s: failed to insert STA entry for the AP (error %d)\n",
3153 sdata->name, err);
a1cf775d
JB		 3154 return err;
3155 }
3156 } else
b203ca39 3157 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
a1cf775d
JB		 3158
3159 return 0;
3160}
3161
77fdaa12
JB		 3162/* config hooks */
3163int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
3164 struct cfg80211_auth_request *req)
9c6bd790 3165{
66e67e41
JB		 3166 struct ieee80211_local *local = sdata->local;
3167 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3168 struct ieee80211_mgd_auth_data *auth_data;
77fdaa12 3169 u16 auth_alg;
66e67e41
JB		 3170 int err;
3171
3172 /* prepare auth data structure */
9c6bd790 3173
77fdaa12
JB		 3174 switch (req->auth_type) {
3175 case NL80211_AUTHTYPE_OPEN_SYSTEM:
3176 auth_alg = WLAN_AUTH_OPEN;
3177 break;
3178 case NL80211_AUTHTYPE_SHARED_KEY:
66e67e41 3179 if (IS_ERR(local->wep_tx_tfm))
9dca9c49 3180 return -EOPNOTSUPP;
77fdaa12
JB		 3181 auth_alg = WLAN_AUTH_SHARED_KEY;
3182 break;
3183 case NL80211_AUTHTYPE_FT:
3184 auth_alg = WLAN_AUTH_FT;
3185 break;
3186 case NL80211_AUTHTYPE_NETWORK_EAP:
3187 auth_alg = WLAN_AUTH_LEAP;
3188 break;
3189 default:
3190 return -EOPNOTSUPP;
60f8b39c 3191 }
77fdaa12 3192
66e67e41
JB		 3193 auth_data = kzalloc(sizeof(*auth_data) + req->ie_len, GFP_KERNEL);
3194 if (!auth_data)
9c6bd790 3195 return -ENOMEM;
77fdaa12 3196
66e67e41 3197 auth_data->bss = req->bss;
77fdaa12
JB		 3198
3199 if (req->ie && req->ie_len) {
66e67e41
JB		 3200 memcpy(auth_data->ie, req->ie, req->ie_len);
3201 auth_data->ie_len = req->ie_len;
9c6bd790 3202 }
77fdaa12 3203
fffd0934 3204 if (req->key && req->key_len) {
66e67e41
JB		 3205 auth_data->key_len = req->key_len;
3206 auth_data->key_idx = req->key_idx;
3207 memcpy(auth_data->key, req->key, req->key_len);
fffd0934
JB		 3208 }
3209
66e67e41 3210 auth_data->algorithm = auth_alg;
60f8b39c 3211
66e67e41 3212 /* try to authenticate/probe */
2a33bee2 3213
66e67e41 3214 mutex_lock(&ifmgd->mtx);
2a33bee2 3215
66e67e41
JB		 3216 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
3217 ifmgd->assoc_data) {
3218 err = -EBUSY;
3219 goto err_free;
2a33bee2
GE		 3220 }
3221
66e67e41
JB		 3222 if (ifmgd->auth_data)
3223 ieee80211_destroy_auth_data(sdata, false);
2a33bee2 3224
66e67e41
JB		 3225 /* prep auth_data so we don't go into idle on disassoc */
3226 ifmgd->auth_data = auth_data;
af6b6374 3227
66e67e41 3228 if (ifmgd->associated)
37ad3888 3229 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
af6b6374 3230
f0d23208 3231 pr_debug("%s: authenticate with %pM\n", sdata->name, req->bss->bssid);
e5b900d2 3232
a1cf775d
JB		 3233 err = ieee80211_prep_connection(sdata, req->bss, false);
3234 if (err)
66e67e41 3235 goto err_clear;
af6b6374 3236
66e67e41
JB		 3237 err = ieee80211_probe_auth(sdata);
3238 if (err) {
66e67e41
JB		 3239 sta_info_destroy_addr(sdata, req->bss->bssid);
3240 goto err_clear;
3241 }
3242
3243 /* hold our own reference */
3244 cfg80211_ref_bss(auth_data->bss);
3245 err = 0;
3246 goto out_unlock;
3247
3248 err_clear:
3249 ifmgd->auth_data = NULL;
3250 err_free:
3251 kfree(auth_data);
3252 out_unlock:
3253 mutex_unlock(&ifmgd->mtx);
b2abb6e2 3254
66e67e41 3255 return err;
af6b6374
JB		 3256}
3257
77fdaa12
JB		 3258int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
3259 struct cfg80211_assoc_request *req)
f0706e82 3260{
66e67e41 3261 struct ieee80211_local *local = sdata->local;
77fdaa12 3262 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 3263 struct ieee80211_bss *bss = (void *)req->bss->priv;
66e67e41 3264 struct ieee80211_mgd_assoc_data *assoc_data;
4e74bfdb 3265 struct ieee80211_supported_band *sband;
9dde6423 3266 const u8 *ssidie, *ht_ie;
2a33bee2 3267 int i, err;
f0706e82 3268
66e67e41
JB		 3269 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
3270 if (!ssidie)
3271 return -EINVAL;
3272
3273 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
3274 if (!assoc_data)
3275 return -ENOMEM;
3276
77fdaa12 3277 mutex_lock(&ifmgd->mtx);
9c87ba67 3278
66e67e41 3279 if (ifmgd->associated)
37ad3888 3280 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
66e67e41
JB		 3281
3282 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
3283 err = -EBUSY;
3284 goto err_free;
af6b6374 3285 }
77fdaa12 3286
66e67e41
JB		 3287 if (ifmgd->assoc_data) {
3288 err = -EBUSY;
3289 goto err_free;
3290 }
77fdaa12 3291
66e67e41
JB		 3292 if (ifmgd->auth_data) {
3293 bool match;
3294
3295 /* keep sta info, bssid if matching */
b203ca39 3296 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
66e67e41 3297 ieee80211_destroy_auth_data(sdata, match);
2a33bee2
GE		 3298 }
3299
66e67e41
JB		 3300 /* prepare assoc data */
3301
77fdaa12 3302 ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
375177bf 3303 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
77fdaa12 3304
d8ec4433
JO		 3305 ifmgd->beacon_crc_valid = false;
3306
de5036aa
JB		 3307 /*
3308 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
3309 * We still associate in non-HT mode (11a/b/g) if any one of these
3310 * ciphers is configured as pairwise.
3311 * We can set this to true for non-11n hardware, that'll be checked
3312 * separately along with the peer capabilities.
3313 */
1c4cb928 3314 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
77fdaa12
JB		 3315 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
3316 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
1c4cb928 3317 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
77fdaa12 3318 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
1c4cb928
JB		 3319 netdev_info(sdata->dev,
3320 "disabling HT due to WEP/TKIP use\n");
3321 }
3322 }
77fdaa12 3323
ef96a842
BG		 3324 if (req->flags & ASSOC_REQ_DISABLE_HT)
3325 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
3326
4e74bfdb
JB		 3327 /* Also disable HT if we don't support it or the AP doesn't use WMM */
3328 sband = local->hw.wiphy->bands[req->bss->channel->band];
3329 if (!sband->ht_cap.ht_supported ||
1c4cb928 3330 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
4e74bfdb 3331 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
1c4cb928
JB		 3332 netdev_info(sdata->dev,
3333 "disabling HT as WMM/QoS is not supported\n");
3334 }
4e74bfdb 3335
ef96a842
BG		 3336 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
3337 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
3338 sizeof(ifmgd->ht_capa_mask));
3339
77fdaa12 3340 if (req->ie && req->ie_len) {
66e67e41
JB		 3341 memcpy(assoc_data->ie, req->ie, req->ie_len);
3342 assoc_data->ie_len = req->ie_len;
3343 }
f679f65d 3344
66e67e41 3345 assoc_data->bss = req->bss;
f679f65d 3346
af6b6374
JB		 3347 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
3348 if (ifmgd->powersave)
3349 ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC;
3350 else
3351 ifmgd->ap_smps = IEEE80211_SMPS_OFF;
3352 } else
3353 ifmgd->ap_smps = ifmgd->req_smps;
3354
66e67e41 3355 assoc_data->capability = req->bss->capability;
32c5057b
JB		 3356 assoc_data->wmm = bss->wmm_used &&
3357 (local->hw.queues >= IEEE80211_NUM_ACS);
66e67e41
JB		 3358 assoc_data->supp_rates = bss->supp_rates;
3359 assoc_data->supp_rates_len = bss->supp_rates_len;
9dde6423
JB		 3360
3361 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
3362 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
3363 assoc_data->ap_ht_param =
3364 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
3365 else
3366 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
63f170e0 3367
ab13315a
KV		 3368 if (bss->wmm_used && bss->uapsd_supported &&
3369 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
76f0303d 3370 assoc_data->uapsd = true;
ab13315a
KV		 3371 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
3372 } else {
76f0303d 3373 assoc_data->uapsd = false;
ab13315a
KV		 3374 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
3375 }
3376
66e67e41
JB		 3377 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
3378 assoc_data->ssid_len = ssidie[1];
63f170e0 3379
77fdaa12 3380 if (req->prev_bssid)
66e67e41 3381 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12
JB		 3382
3383 if (req->use_mfp) {
3384 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
3385 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
3386 } else {
3387 ifmgd->mfp = IEEE80211_MFP_DISABLED;
3388 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
3389 }
3390
3391 if (req->crypto.control_port)
3392 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
3393 else
3394 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
3395
a621fa4d
JB		 3396 sdata->control_port_protocol = req->crypto.control_port_ethertype;
3397 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
3398
66e67e41
JB		 3399 /* kick off associate process */
3400
3401 ifmgd->assoc_data = assoc_data;
3402
a1cf775d
JB		 3403 err = ieee80211_prep_connection(sdata, req->bss, true);
3404 if (err)
3405 goto err_clear;
66e67e41
JB		 3406
3407 if (!bss->dtim_period &&
3408 sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD) {
3409 /*
3410 * Wait up to one beacon interval ...
3411 * should this be more if we miss one?
3412 */
f0d23208
JP		 3413 pr_debug("%s: waiting for beacon from %pM\n",
3414 sdata->name, ifmgd->bssid);
3f9768a5 3415 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
66e67e41
JB		 3416 } else {
3417 assoc_data->have_beacon = true;
3418 assoc_data->sent_assoc = false;
3419 assoc_data->timeout = jiffies;
3420 }
3421 run_again(ifmgd, assoc_data->timeout);
3422
fcff4f10
PS		 3423 if (bss->corrupt_data) {
3424 char *corrupt_type = "data";
3425 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
3426 if (bss->corrupt_data &
3427 IEEE80211_BSS_CORRUPT_PROBE_RESP)
3428 corrupt_type = "beacon and probe response";
3429 else
3430 corrupt_type = "beacon";
3431 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
3432 corrupt_type = "probe response";
f0d23208
JP		 3433 pr_debug("%s: associating with AP with corrupt %s\n",
3434 sdata->name, corrupt_type);
fcff4f10
PS		 3435 }
3436
66e67e41
JB		 3437 err = 0;
3438 goto out;
3439 err_clear:
3440 ifmgd->assoc_data = NULL;
3441 err_free:
3442 kfree(assoc_data);
3443 out:
3444 mutex_unlock(&ifmgd->mtx);
3445
3446 return err;
f0706e82
JB		 3447}
3448
77fdaa12 3449int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
63c9c5e7 3450 struct cfg80211_deauth_request *req)
f0706e82 3451{
46900298 3452 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5fef7dbc 3453 u8 frame_buf[DEAUTH_DISASSOC_LEN];
f0706e82 3454
77fdaa12
JB		 3455 mutex_lock(&ifmgd->mtx);
3456
37ad3888 3457 if (ifmgd->auth_data) {
66e67e41 3458 ieee80211_destroy_auth_data(sdata, false);
a58ce43f 3459 mutex_unlock(&ifmgd->mtx);
66e67e41 3460 return 0;
af6b6374 3461 }
77fdaa12 3462
f0d23208
JP		 3463 pr_debug("%s: deauthenticating from %pM by local choice (reason=%d)\n",
3464 sdata->name, req->bssid, req->reason_code);
0ff71613 3465
37ad3888 3466 if (ifmgd->associated &&
b203ca39 3467 ether_addr_equal(ifmgd->associated->bssid, req->bssid))
37ad3888 3468 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5fef7dbc 3469 req->reason_code, true, frame_buf);
37ad3888
JB		 3470 else
3471 ieee80211_send_deauth_disassoc(sdata, req->bssid,
3472 IEEE80211_STYPE_DEAUTH,
3473 req->reason_code, true,
3474 frame_buf);
3475 mutex_unlock(&ifmgd->mtx);
3476
5fef7dbc 3477 __cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
f0706e82 3478
7da7cc1d 3479 mutex_lock(&sdata->local->mtx);
bc83b681 3480 ieee80211_recalc_idle(sdata->local);
7da7cc1d 3481 mutex_unlock(&sdata->local->mtx);
bc83b681 3482
f0706e82
JB		 3483 return 0;
3484}
84363e6e 3485
77fdaa12 3486int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 3487 struct cfg80211_disassoc_request *req)
9c6bd790 3488{
77fdaa12 3489 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 3490 u8 bssid[ETH_ALEN];
5fef7dbc 3491 u8 frame_buf[DEAUTH_DISASSOC_LEN];
9c6bd790 3492
77fdaa12 3493 mutex_lock(&ifmgd->mtx);
10f644a4 3494
8d8b261a
JB		 3495 /*
3496 * cfg80211 should catch this ... but it's racy since
3497 * we can receive a disassoc frame, process it, hand it
3498 * to cfg80211 while that's in a locked section already
3499 * trying to tell us that the user wants to disconnect.
3500 */
0c1ad2ca 3501 if (ifmgd->associated != req->bss) {
77fdaa12
JB		 3502 mutex_unlock(&ifmgd->mtx);
3503 return -ENOLINK;
3504 }
3505
f0d23208
JP		 3506 pr_debug("%s: disassociating from %pM by local choice (reason=%d)\n",
3507 sdata->name, req->bss->bssid, req->reason_code);
0ff71613 3508
e69e95db 3509 memcpy(bssid, req->bss->bssid, ETH_ALEN);
37ad3888
JB		 3510 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
3511 req->reason_code, !req->local_state_change,
3512 frame_buf);
77fdaa12 3513 mutex_unlock(&ifmgd->mtx);
10f644a4 3514
5fef7dbc 3515 __cfg80211_send_disassoc(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
bc83b681 3516
7da7cc1d 3517 mutex_lock(&sdata->local->mtx);
bc83b681 3518 ieee80211_recalc_idle(sdata->local);
7da7cc1d 3519 mutex_unlock(&sdata->local->mtx);
bc83b681 3520
10f644a4
JB		 3521 return 0;
3522}
026331c4 3523
afa762f6 3524void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
54e4ffb2
JB		 3525{
3526 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3527
3528 mutex_lock(&ifmgd->mtx);
3529 if (ifmgd->assoc_data)
3530 ieee80211_destroy_assoc_data(sdata, false);
3531 if (ifmgd->auth_data)
3532 ieee80211_destroy_auth_data(sdata, false);
3533 del_timer_sync(&ifmgd->timer);
3534 mutex_unlock(&ifmgd->mtx);
3535}
3536
a97c13c3
JO		 3537void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
3538 enum nl80211_cqm_rssi_threshold_event rssi_event,
3539 gfp_t gfp)
3540{
3541 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3542
b5878a2d
JB		 3543 trace_api_cqm_rssi_notify(sdata, rssi_event);
3544
a97c13c3
JO		 3545 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
3546}
3547EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
kernel source for telekom puls (alcatel/mediatek)