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Merge branch 'for-linus' of git://git.kernel.dk/linux-block
[deliverable/linux.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
a1845fc7
JB		 544 drv_mgd_prepare_tx(local, sdata);
545
66e67e41
JB		 546 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
547 ieee80211_tx_skb(sdata, skb);
548}
549
ef422bc0 550static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 551 const u8 *bssid, u16 stype,
5fef7dbc
JB		 552 u16 reason, bool send_frame,
553 u8 *frame_buf)
9ac19a90
JB		 554{
555 struct ieee80211_local *local = sdata->local;
46900298 556 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9ac19a90 557 struct sk_buff *skb;
5fef7dbc 558 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
d15b8459 559
5fef7dbc
JB		 560 /* build frame */
561 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
562 mgmt->duration = 0; /* initialize only */
563 mgmt->seq_ctrl = 0; /* initialize only */
77fdaa12 564 memcpy(mgmt->da, bssid, ETH_ALEN);
47846c9b 565 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
77fdaa12 566 memcpy(mgmt->bssid, bssid, ETH_ALEN);
ef422bc0 567 /* u.deauth.reason_code == u.disassoc.reason_code */
9ac19a90
JB		 568 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
569
5fef7dbc
JB		 570 if (send_frame) {
571 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
572 DEAUTH_DISASSOC_LEN);
573 if (!skb)
574 return;
d5cdfacb 575
5fef7dbc
JB		 576 skb_reserve(skb, local->hw.extra_tx_headroom);
577
578 /* copy in frame */
579 memcpy(skb_put(skb, DEAUTH_DISASSOC_LEN),
580 mgmt, DEAUTH_DISASSOC_LEN);
581
582 if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED))
583 IEEE80211_SKB_CB(skb)->flags |=
584 IEEE80211_TX_INTFL_DONT_ENCRYPT;
a1845fc7
JB		 585
586 drv_mgd_prepare_tx(local, sdata);
587
d5cdfacb 588 ieee80211_tx_skb(sdata, skb);
5fef7dbc 589 }
9ac19a90
JB		 590}
591
572e0012
KV		 592void ieee80211_send_pspoll(struct ieee80211_local *local,
593 struct ieee80211_sub_if_data *sdata)
594{
572e0012
KV		 595 struct ieee80211_pspoll *pspoll;
596 struct sk_buff *skb;
572e0012 597
d8cd189e
KV		 598 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
599 if (!skb)
572e0012 600 return;
572e0012 601
d8cd189e
KV		 602 pspoll = (struct ieee80211_pspoll *) skb->data;
603 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
572e0012 604
62ae67be
JB		 605 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
606 ieee80211_tx_skb(sdata, skb);
572e0012
KV		 607}
608
965bedad
JB		 609void ieee80211_send_nullfunc(struct ieee80211_local *local,
610 struct ieee80211_sub_if_data *sdata,
611 int powersave)
612{
613 struct sk_buff *skb;
d8cd189e 614 struct ieee80211_hdr_3addr *nullfunc;
b6f35301 615 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
965bedad 616
d8cd189e
KV		 617 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
618 if (!skb)
965bedad 619 return;
965bedad 620
d8cd189e 621 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
965bedad 622 if (powersave)
d8cd189e 623 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
965bedad 624
62ae67be 625 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
b6f35301
RM		 626 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
627 IEEE80211_STA_CONNECTION_POLL))
628 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
629
62ae67be 630 ieee80211_tx_skb(sdata, skb);
965bedad
JB		 631}
632
d524215f
FF		 633static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
634 struct ieee80211_sub_if_data *sdata)
635{
636 struct sk_buff *skb;
637 struct ieee80211_hdr *nullfunc;
638 __le16 fc;
639
640 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
641 return;
642
643 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
d15b8459 644 if (!skb)
d524215f 645 return;
d15b8459 646
d524215f
FF		 647 skb_reserve(skb, local->hw.extra_tx_headroom);
648
649 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
650 memset(nullfunc, 0, 30);
651 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
652 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
653 nullfunc->frame_control = fc;
654 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
655 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
656 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
657 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
658
659 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
660 ieee80211_tx_skb(sdata, skb);
661}
662
cc32abd4
JB		 663/* spectrum management related things */
664static void ieee80211_chswitch_work(struct work_struct *work)
665{
666 struct ieee80211_sub_if_data *sdata =
667 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
cc32abd4
JB		 668 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
669
9607e6b6 670 if (!ieee80211_sdata_running(sdata))
cc32abd4
JB		 671 return;
672
77fdaa12
JB		 673 mutex_lock(&ifmgd->mtx);
674 if (!ifmgd->associated)
675 goto out;
cc32abd4
JB		 676
677 sdata->local->oper_channel = sdata->local->csa_channel;
5ce6e438
JB		 678 if (!sdata->local->ops->channel_switch) {
679 /* call "hw_config" only if doing sw channel switch */
680 ieee80211_hw_config(sdata->local,
681 IEEE80211_CONF_CHANGE_CHANNEL);
1ea57b1f
SL		 682 } else {
683 /* update the device channel directly */
684 sdata->local->hw.conf.channel = sdata->local->oper_channel;
5ce6e438 685 }
77fdaa12 686
cc32abd4 687 /* XXX: shouldn't really modify cfg80211-owned data! */
0c1ad2ca 688 ifmgd->associated->channel = sdata->local->oper_channel;
cc32abd4 689
cc32abd4
JB		 690 ieee80211_wake_queues_by_reason(&sdata->local->hw,
691 IEEE80211_QUEUE_STOP_REASON_CSA);
77fdaa12
JB		 692 out:
693 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
694 mutex_unlock(&ifmgd->mtx);
cc32abd4
JB		 695}
696
5ce6e438
JB		 697void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
698{
699 struct ieee80211_sub_if_data *sdata;
700 struct ieee80211_if_managed *ifmgd;
701
702 sdata = vif_to_sdata(vif);
703 ifmgd = &sdata->u.mgd;
704
705 trace_api_chswitch_done(sdata, success);
706 if (!success) {
707 /*
708 * If the channel switch was not successful, stay
709 * around on the old channel. We currently lack
710 * good handling of this situation, possibly we
711 * should just drop the association.
712 */
713 sdata->local->csa_channel = sdata->local->oper_channel;
714 }
715
716 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
717}
718EXPORT_SYMBOL(ieee80211_chswitch_done);
719
cc32abd4
JB		 720static void ieee80211_chswitch_timer(unsigned long data)
721{
722 struct ieee80211_sub_if_data *sdata =
723 (struct ieee80211_sub_if_data *) data;
724 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
725
5bb644a0
JB		 726 if (sdata->local->quiescing) {
727 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
728 return;
729 }
730
42935eca 731 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4
JB		 732}
733
734void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
735 struct ieee80211_channel_sw_ie *sw_elem,
5ce6e438
JB		 736 struct ieee80211_bss *bss,
737 u64 timestamp)
cc32abd4 738{
0c1ad2ca
JB		 739 struct cfg80211_bss *cbss =
740 container_of((void *)bss, struct cfg80211_bss, priv);
cc32abd4
JB		 741 struct ieee80211_channel *new_ch;
742 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
59eb21a6
BR		 743 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num,
744 cbss->channel->band);
cc32abd4 745
77fdaa12
JB		 746 ASSERT_MGD_MTX(ifmgd);
747
748 if (!ifmgd->associated)
cc32abd4
JB		 749 return;
750
fbe9c429 751 if (sdata->local->scanning)
cc32abd4
JB		 752 return;
753
754 /* Disregard subsequent beacons if we are already running a timer
755 processing a CSA */
756
757 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
758 return;
759
760 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
761 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
762 return;
763
764 sdata->local->csa_channel = new_ch;
765
5ce6e438
JB		 766 if (sdata->local->ops->channel_switch) {
767 /* use driver's channel switch callback */
768 struct ieee80211_channel_switch ch_switch;
769 memset(&ch_switch, 0, sizeof(ch_switch));
770 ch_switch.timestamp = timestamp;
771 if (sw_elem->mode) {
772 ch_switch.block_tx = true;
773 ieee80211_stop_queues_by_reason(&sdata->local->hw,
774 IEEE80211_QUEUE_STOP_REASON_CSA);
775 }
776 ch_switch.channel = new_ch;
777 ch_switch.count = sw_elem->count;
778 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
779 drv_channel_switch(sdata->local, &ch_switch);
780 return;
781 }
782
783 /* channel switch handled in software */
cc32abd4 784 if (sw_elem->count <= 1) {
42935eca 785 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4 786 } else {
9feaddc7
WYG		 787 if (sw_elem->mode)
788 ieee80211_stop_queues_by_reason(&sdata->local->hw,
cc32abd4
JB		 789 IEEE80211_QUEUE_STOP_REASON_CSA);
790 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
791 mod_timer(&ifmgd->chswitch_timer,
792 jiffies +
793 msecs_to_jiffies(sw_elem->count *
0c1ad2ca 794 cbss->beacon_interval));
cc32abd4
JB		 795 }
796}
797
798static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
799 u16 capab_info, u8 *pwr_constr_elem,
800 u8 pwr_constr_elem_len)
801{
802 struct ieee80211_conf *conf = &sdata->local->hw.conf;
803
804 if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
805 return;
806
807 /* Power constraint IE length should be 1 octet */
808 if (pwr_constr_elem_len != 1)
809 return;
810
a48b13ac 811 if ((*pwr_constr_elem <= conf->channel->max_reg_power) &&
cc32abd4
JB		 812 (*pwr_constr_elem != sdata->local->power_constr_level)) {
813 sdata->local->power_constr_level = *pwr_constr_elem;
814 ieee80211_hw_config(sdata->local, 0);
815 }
816}
817
f90754c1
JO		 818void ieee80211_enable_dyn_ps(struct ieee80211_vif *vif)
819{
820 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
821 struct ieee80211_local *local = sdata->local;
822 struct ieee80211_conf *conf = &local->hw.conf;
823
824 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
825 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
826 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
827
828 local->disable_dynamic_ps = false;
829 conf->dynamic_ps_timeout = local->dynamic_ps_user_timeout;
830}
831EXPORT_SYMBOL(ieee80211_enable_dyn_ps);
832
833void ieee80211_disable_dyn_ps(struct ieee80211_vif *vif)
834{
835 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
836 struct ieee80211_local *local = sdata->local;
837 struct ieee80211_conf *conf = &local->hw.conf;
838
839 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
840 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
841 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
842
843 local->disable_dynamic_ps = true;
844 conf->dynamic_ps_timeout = 0;
845 del_timer_sync(&local->dynamic_ps_timer);
846 ieee80211_queue_work(&local->hw,
847 &local->dynamic_ps_enable_work);
848}
849EXPORT_SYMBOL(ieee80211_disable_dyn_ps);
850
965bedad
JB		 851/* powersave */
852static void ieee80211_enable_ps(struct ieee80211_local *local,
853 struct ieee80211_sub_if_data *sdata)
854{
855 struct ieee80211_conf *conf = &local->hw.conf;
856
d5edaedc
JB		 857 /*
858 * If we are scanning right now then the parameters will
859 * take effect when scan finishes.
860 */
fbe9c429 861 if (local->scanning)
d5edaedc
JB		 862 return;
863
965bedad
JB		 864 if (conf->dynamic_ps_timeout > 0 &&
865 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
866 mod_timer(&local->dynamic_ps_timer, jiffies +
867 msecs_to_jiffies(conf->dynamic_ps_timeout));
868 } else {
869 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
870 ieee80211_send_nullfunc(local, sdata, 1);
375177bf 871
2a13052f
JO		 872 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
873 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
874 return;
875
876 conf->flags |= IEEE80211_CONF_PS;
877 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965bedad
JB		 878 }
879}
880
881static void ieee80211_change_ps(struct ieee80211_local *local)
882{
883 struct ieee80211_conf *conf = &local->hw.conf;
884
885 if (local->ps_sdata) {
965bedad
JB		 886 ieee80211_enable_ps(local, local->ps_sdata);
887 } else if (conf->flags & IEEE80211_CONF_PS) {
888 conf->flags &= ~IEEE80211_CONF_PS;
889 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
890 del_timer_sync(&local->dynamic_ps_timer);
891 cancel_work_sync(&local->dynamic_ps_enable_work);
892 }
893}
894
808118cb
JY		 895static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
896{
897 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
898 struct sta_info *sta = NULL;
c2c98fde 899 bool authorized = false;
808118cb
JY		 900
901 if (!mgd->powersave)
902 return false;
903
05cb9108
JB		 904 if (mgd->broken_ap)
905 return false;
906
808118cb
JY		 907 if (!mgd->associated)
908 return false;
909
808118cb
JY		 910 if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
911 IEEE80211_STA_CONNECTION_POLL))
912 return false;
913
914 rcu_read_lock();
915 sta = sta_info_get(sdata, mgd->bssid);
916 if (sta)
c2c98fde 917 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
808118cb
JY		 918 rcu_read_unlock();
919
c2c98fde 920 return authorized;
808118cb
JY		 921}
922
965bedad 923/* need to hold RTNL or interface lock */
10f644a4 924void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 925{
926 struct ieee80211_sub_if_data *sdata, *found = NULL;
927 int count = 0;
195e294d 928 int timeout;
965bedad
JB		 929
930 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
931 local->ps_sdata = NULL;
932 return;
933 }
934
935 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 936 if (!ieee80211_sdata_running(sdata))
965bedad 937 continue;
8c7914de
RM		 938 if (sdata->vif.type == NL80211_IFTYPE_AP) {
939 /* If an AP vif is found, then disable PS
940 * by setting the count to zero thereby setting
941 * ps_sdata to NULL.
942 */
943 count = 0;
944 break;
945 }
965bedad
JB		 946 if (sdata->vif.type != NL80211_IFTYPE_STATION)
947 continue;
948 found = sdata;
949 count++;
950 }
951
808118cb 952 if (count == 1 && ieee80211_powersave_allowed(found)) {
f90754c1 953 struct ieee80211_conf *conf = &local->hw.conf;
10f644a4
JB		 954 s32 beaconint_us;
955
956 if (latency < 0)
ed77134b 957 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
10f644a4
JB		 958
959 beaconint_us = ieee80211_tu_to_usec(
960 found->vif.bss_conf.beacon_int);
961
ff616381 962 timeout = local->dynamic_ps_forced_timeout;
195e294d
JO		 963 if (timeout < 0) {
964 /*
ff616381
JO		 965 * Go to full PSM if the user configures a very low
966 * latency requirement.
0ab82b04
EP		 967 * The 2000 second value is there for compatibility
968 * until the PM_QOS_NETWORK_LATENCY is configured
969 * with real values.
195e294d 970 */
0ab82b04
EP		 971 if (latency > (1900 * USEC_PER_MSEC) &&
972 latency != (2000 * USEC_PER_SEC))
195e294d 973 timeout = 0;
ff616381
JO		 974 else
975 timeout = 100;
195e294d 976 }
f90754c1
JO		 977 local->dynamic_ps_user_timeout = timeout;
978 if (!local->disable_dynamic_ps)
979 conf->dynamic_ps_timeout =
980 local->dynamic_ps_user_timeout;
195e294d 981
04fe2037 982 if (beaconint_us > latency) {
10f644a4 983 local->ps_sdata = NULL;
04fe2037 984 } else {
56007a02 985 struct ieee80211_bss *bss;
04fe2037 986 int maxslp = 1;
56007a02 987 u8 dtimper;
04fe2037 988
56007a02
JB		 989 bss = (void *)found->u.mgd.associated->priv;
990 dtimper = bss->dtim_period;
991
992 /* If the TIM IE is invalid, pretend the value is 1 */
993 if (!dtimper)
994 dtimper = 1;
995 else if (dtimper > 1)
04fe2037
JB		 996 maxslp = min_t(int, dtimper,
997 latency / beaconint_us);
998
9ccebe61 999 local->hw.conf.max_sleep_period = maxslp;
56007a02 1000 local->hw.conf.ps_dtim_period = dtimper;
10f644a4 1001 local->ps_sdata = found;
04fe2037 1002 }
10f644a4 1003 } else {
965bedad 1004 local->ps_sdata = NULL;
10f644a4 1005 }
965bedad
JB		 1006
1007 ieee80211_change_ps(local);
1008}
1009
1010void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1011{
1012 struct ieee80211_local *local =
1013 container_of(work, struct ieee80211_local,
1014 dynamic_ps_disable_work);
1015
1016 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1017 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1018 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1019 }
1020
1021 ieee80211_wake_queues_by_reason(&local->hw,
1022 IEEE80211_QUEUE_STOP_REASON_PS);
1023}
1024
1025void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1026{
1027 struct ieee80211_local *local =
1028 container_of(work, struct ieee80211_local,
1029 dynamic_ps_enable_work);
1030 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
5e34069c 1031 struct ieee80211_if_managed *ifmgd;
1ddc2867
RM		 1032 unsigned long flags;
1033 int q;
965bedad
JB		 1034
1035 /* can only happen when PS was just disabled anyway */
1036 if (!sdata)
1037 return;
1038
5e34069c
CL		 1039 ifmgd = &sdata->u.mgd;
1040
965bedad
JB		 1041 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1042 return;
1043
77b7023a
AN		 1044 if (!local->disable_dynamic_ps &&
1045 local->hw.conf.dynamic_ps_timeout > 0) {
1046 /* don't enter PS if TX frames are pending */
1047 if (drv_tx_frames_pending(local)) {
1ddc2867
RM		 1048 mod_timer(&local->dynamic_ps_timer, jiffies +
1049 msecs_to_jiffies(
1050 local->hw.conf.dynamic_ps_timeout));
1051 return;
1052 }
77b7023a
AN		 1053
1054 /*
1055 * transmission can be stopped by others which leads to
1056 * dynamic_ps_timer expiry. Postpone the ps timer if it
1057 * is not the actual idle state.
1058 */
1059 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1060 for (q = 0; q < local->hw.queues; q++) {
1061 if (local->queue_stop_reasons[q]) {
1062 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1063 flags);
1064 mod_timer(&local->dynamic_ps_timer, jiffies +
1065 msecs_to_jiffies(
1066 local->hw.conf.dynamic_ps_timeout));
1067 return;
1068 }
1069 }
1070 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1ddc2867 1071 }
1ddc2867 1072
375177bf 1073 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
9c38a8b4 1074 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
f3e85b9e 1075 netif_tx_stop_all_queues(sdata->dev);
965bedad 1076
e8306f98
VN		 1077 if (drv_tx_frames_pending(local))
1078 mod_timer(&local->dynamic_ps_timer, jiffies +
1079 msecs_to_jiffies(
1080 local->hw.conf.dynamic_ps_timeout));
1081 else {
1082 ieee80211_send_nullfunc(local, sdata, 1);
1083 /* Flush to get the tx status of nullfunc frame */
1084 drv_flush(local, false);
1085 }
f3e85b9e
VN		 1086 }
1087
2a13052f
JO		 1088 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1089 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
375177bf
VN		 1090 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1091 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1092 local->hw.conf.flags |= IEEE80211_CONF_PS;
1093 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1094 }
f3e85b9e 1095
77b7023a
AN		 1096 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1097 netif_tx_wake_all_queues(sdata->dev);
965bedad
JB		 1098}
1099
1100void ieee80211_dynamic_ps_timer(unsigned long data)
1101{
1102 struct ieee80211_local *local = (void *) data;
1103
78f1a8b7 1104 if (local->quiescing || local->suspended)
5bb644a0
JB		 1105 return;
1106
42935eca 1107 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 1108}
1109
60f8b39c 1110/* MLME */
7d25745d 1111static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
4ced3f74 1112 struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1113 u8 *wmm_param, size_t wmm_param_len)
1114{
f0706e82 1115 struct ieee80211_tx_queue_params params;
4ced3f74 1116 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1117 size_t left;
1118 int count;
ab13315a 1119 u8 *pos, uapsd_queues = 0;
f0706e82 1120
e1b3ec1a 1121 if (!local->ops->conf_tx)
7d25745d 1122 return false;
e1b3ec1a 1123
32c5057b 1124 if (local->hw.queues < IEEE80211_NUM_ACS)
7d25745d 1125 return false;
3434fbd3
JB		 1126
1127 if (!wmm_param)
7d25745d 1128 return false;
3434fbd3 1129
f0706e82 1130 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
7d25745d 1131 return false;
ab13315a
KV		 1132
1133 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
dc41e4d4 1134 uapsd_queues = ifmgd->uapsd_queues;
ab13315a 1135
f0706e82 1136 count = wmm_param[6] & 0x0f;
46900298 1137 if (count == ifmgd->wmm_last_param_set)
7d25745d 1138 return false;
46900298 1139 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 1140
1141 pos = wmm_param + 8;
1142 left = wmm_param_len - 8;
1143
1144 memset(&params, 0, sizeof(params));
1145
00e96dec 1146 sdata->wmm_acm = 0;
f0706e82
JB		 1147 for (; left >= 4; left -= 4, pos += 4) {
1148 int aci = (pos[0] >> 5) & 0x03;
1149 int acm = (pos[0] >> 4) & 0x01;
ab13315a 1150 bool uapsd = false;
f0706e82
JB		 1151 int queue;
1152
1153 switch (aci) {
0eeb59fe 1154 case 1: /* AC_BK */
e100bb64 1155 queue = 3;
988c0f72 1156 if (acm)
00e96dec 1157 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV		 1158 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1159 uapsd = true;
f0706e82 1160 break;
0eeb59fe 1161 case 2: /* AC_VI */
e100bb64 1162 queue = 1;
988c0f72 1163 if (acm)
00e96dec 1164 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV		 1165 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1166 uapsd = true;
f0706e82 1167 break;
0eeb59fe 1168 case 3: /* AC_VO */
e100bb64 1169 queue = 0;
988c0f72 1170 if (acm)
00e96dec 1171 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV		 1172 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1173 uapsd = true;
f0706e82 1174 break;
0eeb59fe 1175 case 0: /* AC_BE */
f0706e82 1176 default:
e100bb64 1177 queue = 2;
988c0f72 1178 if (acm)
00e96dec 1179 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV		 1180 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1181 uapsd = true;
f0706e82
JB		 1182 break;
1183 }
1184
1185 params.aifs = pos[0] & 0x0f;
1186 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1187 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 1188 params.txop = get_unaligned_le16(pos + 2);
ab13315a
KV		 1189 params.uapsd = uapsd;
1190
bdcbd8e0
JB		 1191 mlme_dbg(sdata,
1192 "WMM queue=%d aci=%d acm=%d aifs=%d 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);
f6f3def3
EP		 1196 sdata->tx_conf[queue] = params;
1197 if (drv_conf_tx(local, sdata, queue, &params))
bdcbd8e0
JB		 1198 sdata_err(sdata,
1199 "failed to set TX queue parameters for queue %d\n",
1200 queue);
f0706e82 1201 }
e1b3ec1a
SG		 1202
1203 /* enable WMM or activate new settings */
4ced3f74 1204 sdata->vif.bss_conf.qos = true;
7d25745d 1205 return 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 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
50ae34a2 1273 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 1274
7ccc8bd7
FF		 1275 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1276 IEEE80211_BEACON_LOSS_COUNT * bss_conf->beacon_int));
1277
0c1ad2ca
JB		 1278 sdata->u.mgd.associated = cbss;
1279 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 1280
17e4ec14
JM		 1281 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1282
b291ba11 1283 /* just to be sure */
925e64c3 1284 ieee80211_stop_poll(sdata);
b291ba11 1285
9ac19a90 1286 ieee80211_led_assoc(local, 1);
9306102e 1287
e5b900d2
JB		 1288 if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
1289 bss_conf->dtim_period = bss->dtim_period;
1290 else
1291 bss_conf->dtim_period = 0;
1292
68542962 1293 bss_conf->assoc = 1;
9cef8737 1294
a97c13c3 1295 /* Tell the driver to monitor connection quality (if supported) */
ea086359 1296 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
68542962 1297 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 1298 bss_info_changed |= BSS_CHANGED_CQM;
1299
68542962
JO		 1300 /* Enable ARP filtering */
1301 if (bss_conf->arp_filter_enabled != sdata->arp_filter_state) {
1302 bss_conf->arp_filter_enabled = sdata->arp_filter_state;
1303 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1304 }
1305
ae5eb026 1306 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 1307
056508dc
JB		 1308 mutex_lock(&local->iflist_mtx);
1309 ieee80211_recalc_ps(local, -1);
025e6be2 1310 ieee80211_recalc_smps(local);
056508dc 1311 mutex_unlock(&local->iflist_mtx);
e0cb686f 1312
8a5b33f5 1313 netif_tx_start_all_queues(sdata->dev);
9ac19a90 1314 netif_carrier_on(sdata->dev);
f0706e82
JB		 1315}
1316
e69e95db 1317static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
37ad3888
JB		 1318 u16 stype, u16 reason, bool tx,
1319 u8 *frame_buf)
aa458d17 1320{
46900298 1321 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17
TW		 1322 struct ieee80211_local *local = sdata->local;
1323 struct sta_info *sta;
3cc5240b 1324 u32 changed = 0;
aa458d17 1325
77fdaa12
JB		 1326 ASSERT_MGD_MTX(ifmgd);
1327
37ad3888
JB		 1328 if (WARN_ON_ONCE(tx && !frame_buf))
1329 return;
1330
b291ba11
JB		 1331 if (WARN_ON(!ifmgd->associated))
1332 return;
1333
79543d8e
DS		 1334 ieee80211_stop_poll(sdata);
1335
77fdaa12 1336 ifmgd->associated = NULL;
77fdaa12
JB		 1337
1338 /*
1339 * we need to commit the associated = NULL change because the
1340 * scan code uses that to determine whether this iface should
1341 * go to/wake up from powersave or not -- and could otherwise
1342 * wake the queues erroneously.
1343 */
1344 smp_mb();
1345
1346 /*
1347 * Thus, we can only afterwards stop the queues -- to account
1348 * for the case where another CPU is finishing a scan at this
1349 * time -- we don't want the scan code to enable queues.
1350 */
aa458d17 1351
8a5b33f5 1352 netif_tx_stop_all_queues(sdata->dev);
aa458d17
TW		 1353 netif_carrier_off(sdata->dev);
1354
2a419056 1355 mutex_lock(&local->sta_mtx);
88a9e31c 1356 sta = sta_info_get(sdata, ifmgd->bssid);
4cad6c7c 1357 if (sta) {
c2c98fde 1358 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
53f73c09 1359 ieee80211_sta_tear_down_BA_sessions(sta, tx);
4cad6c7c 1360 }
2a419056 1361 mutex_unlock(&local->sta_mtx);
aa458d17 1362
88bc40e8
EP		 1363 /*
1364 * if we want to get out of ps before disassoc (why?) we have
1365 * to do it before sending disassoc, as otherwise the null-packet
1366 * won't be valid.
1367 */
1368 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1369 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1370 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1371 }
1372 local->ps_sdata = NULL;
1373
f823981e
EP		 1374 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1375 if (tx)
1376 drv_flush(local, false);
1377
37ad3888
JB		 1378 /* deauthenticate/disassociate now */
1379 if (tx || frame_buf)
88a9e31c
EP		 1380 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
1381 reason, tx, frame_buf);
37ad3888
JB		 1382
1383 /* flush out frame */
1384 if (tx)
1385 drv_flush(local, false);
1386
88a9e31c
EP		 1387 /* clear bssid only after building the needed mgmt frames */
1388 memset(ifmgd->bssid, 0, ETH_ALEN);
1389
37ad3888
JB		 1390 /* remove AP and TDLS peers */
1391 sta_info_flush(local, sdata);
1392
1393 /* finally reset all BSS / config parameters */
f5e5bf25
TW		 1394 changed |= ieee80211_reset_erp_info(sdata);
1395
f5e5bf25 1396 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 1397 changed |= BSS_CHANGED_ASSOC;
1398 sdata->vif.bss_conf.assoc = false;
f5e5bf25 1399
413ad50a 1400 /* on the next assoc, re-program HT parameters */
ef96a842
BG		 1401 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1402 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
413ad50a 1403
a8302de9
VT		 1404 local->power_constr_level = 0;
1405
520eb820
KV		 1406 del_timer_sync(&local->dynamic_ps_timer);
1407 cancel_work_sync(&local->dynamic_ps_enable_work);
1408
68542962
JO		 1409 /* Disable ARP filtering */
1410 if (sdata->vif.bss_conf.arp_filter_enabled) {
1411 sdata->vif.bss_conf.arp_filter_enabled = false;
1412 changed |= BSS_CHANGED_ARP_FILTER;
1413 }
1414
3abead59
JB		 1415 sdata->vif.bss_conf.qos = false;
1416 changed |= BSS_CHANGED_QOS;
1417
0aaffa9b
JB		 1418 /* The BSSID (not really interesting) and HT changed */
1419 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 1420 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 1421
3cc5240b
JB		 1422 /* channel(_type) changes are handled by ieee80211_hw_config */
1423 WARN_ON(!ieee80211_set_channel_type(local, sdata, NL80211_CHAN_NO_HT));
1424 ieee80211_hw_config(local, 0);
1425
3abead59
JB		 1426 /* disassociated - set to defaults now */
1427 ieee80211_set_wmm_default(sdata, false);
1428
b9dcf712
JB		 1429 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1430 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1431 del_timer_sync(&sdata->u.mgd.timer);
1432 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2d9957cc
JB		 1433
1434 sdata->u.mgd.timers_running = 0;
aa458d17 1435}
f0706e82 1436
3cf335d5
KV		 1437void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1438 struct ieee80211_hdr *hdr)
1439{
1440 /*
1441 * We can postpone the mgd.timer whenever receiving unicast frames
1442 * from AP because we know that the connection is working both ways
1443 * at that time. But multicast frames (and hence also beacons) must
1444 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 1445 * data idle periods for sending the periodic probe request to the
1446 * AP we're connected to.
3cf335d5 1447 */
b291ba11
JB		 1448 if (is_multicast_ether_addr(hdr->addr1))
1449 return;
1450
be099e82 1451 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 1452}
f0706e82 1453
4e5ff376
FF		 1454static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1455{
1456 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
133d40f9 1457 struct ieee80211_local *local = sdata->local;
4e5ff376 1458
133d40f9 1459 mutex_lock(&local->mtx);
4e5ff376 1460 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
133d40f9
SG		 1461 IEEE80211_STA_CONNECTION_POLL))) {
1462 mutex_unlock(&local->mtx);
1463 return;
1464 }
4e5ff376 1465
925e64c3 1466 __ieee80211_stop_poll(sdata);
133d40f9
SG		 1467
1468 mutex_lock(&local->iflist_mtx);
1469 ieee80211_recalc_ps(local, -1);
1470 mutex_unlock(&local->iflist_mtx);
4e5ff376
FF		 1471
1472 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
133d40f9 1473 goto out;
4e5ff376
FF		 1474
1475 /*
1476 * We've received a probe response, but are not sure whether
1477 * we have or will be receiving any beacons or data, so let's
1478 * schedule the timers again, just in case.
1479 */
1480 ieee80211_sta_reset_beacon_monitor(sdata);
1481
1482 mod_timer(&ifmgd->conn_mon_timer,
1483 round_jiffies_up(jiffies +
1484 IEEE80211_CONNECTION_IDLE_TIME));
133d40f9 1485out:
133d40f9 1486 mutex_unlock(&local->mtx);
4e5ff376
FF		 1487}
1488
1489void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
04ac3c0e 1490 struct ieee80211_hdr *hdr, bool ack)
4e5ff376 1491{
75706d0e 1492 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF		 1493 return;
1494
04ac3c0e
FF		 1495 if (ack)
1496 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF		 1497
1498 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1499 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e
FF		 1500 if (ack)
1501 sdata->u.mgd.probe_send_count = 0;
1502 else
1503 sdata->u.mgd.nullfunc_failed = true;
4e5ff376
FF		 1504 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1505 }
1506}
1507
a43abf29
ML		 1508static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1509{
1510 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1511 const u8 *ssid;
f01a067d 1512 u8 *dst = ifmgd->associated->bssid;
180205bd 1513 u8 unicast_limit = max(1, max_probe_tries - 3);
f01a067d
LR		 1514
1515 /*
1516 * Try sending broadcast probe requests for the last three
1517 * probe requests after the first ones failed since some
1518 * buggy APs only support broadcast probe requests.
1519 */
1520 if (ifmgd->probe_send_count >= unicast_limit)
1521 dst = NULL;
a43abf29 1522
4e5ff376
FF		 1523 /*
1524 * When the hardware reports an accurate Tx ACK status, it's
1525 * better to send a nullfunc frame instead of a probe request,
1526 * as it will kick us off the AP quickly if we aren't associated
1527 * anymore. The timeout will be reset if the frame is ACKed by
1528 * the AP.
1529 */
992e68bf
SD		 1530 ifmgd->probe_send_count++;
1531
04ac3c0e
FF		 1532 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1533 ifmgd->nullfunc_failed = false;
4e5ff376 1534 ieee80211_send_nullfunc(sdata->local, sdata, 0);
04ac3c0e 1535 } else {
88c868c4
SG		 1536 int ssid_len;
1537
4e5ff376 1538 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
88c868c4
SG		 1539 if (WARN_ON_ONCE(ssid == NULL))
1540 ssid_len = 0;
1541 else
1542 ssid_len = ssid[1];
1543
1544 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
1545 0, (u32) -1, true, false);
4e5ff376 1546 }
a43abf29 1547
180205bd 1548 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
a43abf29 1549 run_again(ifmgd, ifmgd->probe_timeout);
f69b9c79
RM		 1550 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
1551 drv_flush(sdata->local, false);
a43abf29
ML		 1552}
1553
b291ba11
JB		 1554static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1555 bool beacon)
04de8381 1556{
04de8381 1557 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 1558 bool already = false;
34bfc411 1559
9607e6b6 1560 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 1561 return;
1562
77fdaa12
JB		 1563 mutex_lock(&ifmgd->mtx);
1564
1565 if (!ifmgd->associated)
1566 goto out;
1567
133d40f9
SG		 1568 mutex_lock(&sdata->local->mtx);
1569
1570 if (sdata->local->tmp_channel || sdata->local->scanning) {
1571 mutex_unlock(&sdata->local->mtx);
1572 goto out;
1573 }
1574
e87cc472 1575 if (beacon)
bdcbd8e0
JB		 1576 mlme_dbg_ratelimited(sdata,
1577 "detected beacon loss from AP - sending probe request\n");
1578
6efb71b0
HS		 1579 ieee80211_cqm_rssi_notify(&sdata->vif,
1580 NL80211_CQM_RSSI_BEACON_LOSS_EVENT, GFP_KERNEL);
04de8381 1581
b291ba11
JB		 1582 /*
1583 * The driver/our work has already reported this event or the
1584 * connection monitoring has kicked in and we have already sent
1585 * a probe request. Or maybe the AP died and the driver keeps
1586 * reporting until we disassociate...
1587 *
1588 * In either case we have to ignore the current call to this
1589 * function (except for setting the correct probe reason bit)
1590 * because otherwise we would reset the timer every time and
1591 * never check whether we received a probe response!
1592 */
1593 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1594 IEEE80211_STA_CONNECTION_POLL))
1595 already = true;
1596
1597 if (beacon)
1598 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1599 else
1600 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1601
133d40f9
SG		 1602 mutex_unlock(&sdata->local->mtx);
1603
b291ba11
JB		 1604 if (already)
1605 goto out;
1606
4e751843
JB		 1607 mutex_lock(&sdata->local->iflist_mtx);
1608 ieee80211_recalc_ps(sdata->local, -1);
1609 mutex_unlock(&sdata->local->iflist_mtx);
1610
a43abf29
ML		 1611 ifmgd->probe_send_count = 0;
1612 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12
JB		 1613 out:
1614 mutex_unlock(&ifmgd->mtx);
04de8381
KV		 1615}
1616
a619a4c0
JO		 1617struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
1618 struct ieee80211_vif *vif)
1619{
1620 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1621 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d9b3b28b 1622 struct cfg80211_bss *cbss;
a619a4c0
JO		 1623 struct sk_buff *skb;
1624 const u8 *ssid;
88c868c4 1625 int ssid_len;
a619a4c0
JO		 1626
1627 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1628 return NULL;
1629
1630 ASSERT_MGD_MTX(ifmgd);
1631
d9b3b28b
EP		 1632 if (ifmgd->associated)
1633 cbss = ifmgd->associated;
1634 else if (ifmgd->auth_data)
1635 cbss = ifmgd->auth_data->bss;
1636 else if (ifmgd->assoc_data)
1637 cbss = ifmgd->assoc_data->bss;
1638 else
a619a4c0
JO		 1639 return NULL;
1640
d9b3b28b 1641 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
88c868c4
SG		 1642 if (WARN_ON_ONCE(ssid == NULL))
1643 ssid_len = 0;
1644 else
1645 ssid_len = ssid[1];
1646
d9b3b28b 1647 skb = ieee80211_build_probe_req(sdata, cbss->bssid,
88c868c4 1648 (u32) -1, ssid + 2, ssid_len,
85a237fe 1649 NULL, 0, true);
a619a4c0
JO		 1650
1651 return skb;
1652}
1653EXPORT_SYMBOL(ieee80211_ap_probereq_get);
1654
1e4dcd01
JO		 1655static void __ieee80211_connection_loss(struct ieee80211_sub_if_data *sdata)
1656{
1657 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1658 struct ieee80211_local *local = sdata->local;
1659 u8 bssid[ETH_ALEN];
5fef7dbc 1660 u8 frame_buf[DEAUTH_DISASSOC_LEN];
1e4dcd01
JO		 1661
1662 mutex_lock(&ifmgd->mtx);
1663 if (!ifmgd->associated) {
1664 mutex_unlock(&ifmgd->mtx);
1665 return;
1666 }
1667
1668 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
1669
bdcbd8e0 1670 sdata_info(sdata, "Connection to AP %pM lost\n", bssid);
1e4dcd01 1671
37ad3888
JB		 1672 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
1673 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
1674 false, frame_buf);
1e4dcd01 1675 mutex_unlock(&ifmgd->mtx);
7da7cc1d 1676
1e4dcd01
JO		 1677 /*
1678 * must be outside lock due to cfg80211,
1679 * but that's not a problem.
1680 */
5fef7dbc 1681 cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
fcac4fb0
FF		 1682
1683 mutex_lock(&local->mtx);
1684 ieee80211_recalc_idle(local);
1685 mutex_unlock(&local->mtx);
1e4dcd01
JO		 1686}
1687
1688void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 1689{
1690 struct ieee80211_sub_if_data *sdata =
1691 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 1692 u.mgd.beacon_connection_loss_work);
a85e1d55
PS		 1693 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1694 struct sta_info *sta;
1695
1696 if (ifmgd->associated) {
30fa9047 1697 rcu_read_lock();
a85e1d55
PS		 1698 sta = sta_info_get(sdata, ifmgd->bssid);
1699 if (sta)
1700 sta->beacon_loss_count++;
30fa9047 1701 rcu_read_unlock();
a85e1d55 1702 }
b291ba11 1703
1e4dcd01
JO		 1704 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1705 __ieee80211_connection_loss(sdata);
1706 else
1707 ieee80211_mgd_probe_ap(sdata, true);
b291ba11
JB		 1708}
1709
04de8381
KV		 1710void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1711{
1712 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 1713 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 1714
b5878a2d
JB		 1715 trace_api_beacon_loss(sdata);
1716
1e4dcd01
JO		 1717 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
1718 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 1719}
1720EXPORT_SYMBOL(ieee80211_beacon_loss);
1721
1e4dcd01
JO		 1722void ieee80211_connection_loss(struct ieee80211_vif *vif)
1723{
1724 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1725 struct ieee80211_hw *hw = &sdata->local->hw;
1726
b5878a2d
JB		 1727 trace_api_connection_loss(sdata);
1728
1e4dcd01
JO		 1729 WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR));
1730 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1731}
1732EXPORT_SYMBOL(ieee80211_connection_loss);
1733
1734
66e67e41
JB		 1735static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
1736 bool assoc)
1737{
1738 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1739
1740 lockdep_assert_held(&sdata->u.mgd.mtx);
1741
66e67e41
JB		 1742 if (!assoc) {
1743 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
1744
1745 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
1746 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
1747 }
1748
1749 cfg80211_put_bss(auth_data->bss);
1750 kfree(auth_data);
1751 sdata->u.mgd.auth_data = NULL;
1752}
1753
1754static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1755 struct ieee80211_mgmt *mgmt, size_t len)
1756{
1757 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1758 u8 *pos;
1759 struct ieee802_11_elems elems;
1760
1761 pos = mgmt->u.auth.variable;
1762 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1763 if (!elems.challenge)
1764 return;
1765 auth_data->expected_transaction = 4;
a1845fc7 1766 drv_mgd_prepare_tx(sdata->local, sdata);
66e67e41
JB		 1767 ieee80211_send_auth(sdata, 3, auth_data->algorithm,
1768 elems.challenge - 2, elems.challenge_len + 2,
1769 auth_data->bss->bssid, auth_data->bss->bssid,
1770 auth_data->key, auth_data->key_len,
1771 auth_data->key_idx);
1772}
1773
1774static enum rx_mgmt_action __must_check
1775ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1776 struct ieee80211_mgmt *mgmt, size_t len)
1777{
1778 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1779 u8 bssid[ETH_ALEN];
1780 u16 auth_alg, auth_transaction, status_code;
1781 struct sta_info *sta;
1782
1783 lockdep_assert_held(&ifmgd->mtx);
1784
1785 if (len < 24 + 6)
1786 return RX_MGMT_NONE;
1787
1788 if (!ifmgd->auth_data || ifmgd->auth_data->done)
1789 return RX_MGMT_NONE;
1790
1791 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
1792
b203ca39 1793 if (!ether_addr_equal(bssid, mgmt->bssid))
66e67e41
JB		 1794 return RX_MGMT_NONE;
1795
1796 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1797 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1798 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1799
1800 if (auth_alg != ifmgd->auth_data->algorithm ||
1801 auth_transaction != ifmgd->auth_data->expected_transaction)
1802 return RX_MGMT_NONE;
1803
1804 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 1805 sdata_info(sdata, "%pM denied authentication (status %d)\n",
1806 mgmt->sa, status_code);
dac211ec
EP		 1807 ieee80211_destroy_auth_data(sdata, false);
1808 return RX_MGMT_CFG80211_RX_AUTH;
66e67e41
JB		 1809 }
1810
1811 switch (ifmgd->auth_data->algorithm) {
1812 case WLAN_AUTH_OPEN:
1813 case WLAN_AUTH_LEAP:
1814 case WLAN_AUTH_FT:
1815 break;
1816 case WLAN_AUTH_SHARED_KEY:
1817 if (ifmgd->auth_data->expected_transaction != 4) {
1818 ieee80211_auth_challenge(sdata, mgmt, len);
1819 /* need another frame */
1820 return RX_MGMT_NONE;
1821 }
1822 break;
1823 default:
1824 WARN_ONCE(1, "invalid auth alg %d",
1825 ifmgd->auth_data->algorithm);
1826 return RX_MGMT_NONE;
1827 }
1828
bdcbd8e0 1829 sdata_info(sdata, "authenticated\n");
66e67e41
JB		 1830 ifmgd->auth_data->done = true;
1831 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
1832 run_again(ifmgd, ifmgd->auth_data->timeout);
1833
1834 /* move station state to auth */
1835 mutex_lock(&sdata->local->sta_mtx);
1836 sta = sta_info_get(sdata, bssid);
1837 if (!sta) {
1838 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
1839 goto out_err;
1840 }
1841 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
bdcbd8e0 1842 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
66e67e41
JB		 1843 goto out_err;
1844 }
1845 mutex_unlock(&sdata->local->sta_mtx);
1846
1847 return RX_MGMT_CFG80211_RX_AUTH;
1848 out_err:
1849 mutex_unlock(&sdata->local->sta_mtx);
1850 /* ignore frame -- wait for timeout */
1851 return RX_MGMT_NONE;
1852}
1853
1854
77fdaa12
JB		 1855static enum rx_mgmt_action __must_check
1856ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
77fdaa12 1857 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1858{
46900298 1859 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 1860 const u8 *bssid = NULL;
f0706e82
JB		 1861 u16 reason_code;
1862
66e67e41
JB		 1863 lockdep_assert_held(&ifmgd->mtx);
1864
f4ea83dd 1865 if (len < 24 + 2)
77fdaa12 1866 return RX_MGMT_NONE;
f0706e82 1867
66e67e41 1868 if (!ifmgd->associated ||
b203ca39 1869 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
66e67e41 1870 return RX_MGMT_NONE;
77fdaa12 1871
0c1ad2ca 1872 bssid = ifmgd->associated->bssid;
f0706e82
JB		 1873
1874 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1875
bdcbd8e0
JB		 1876 sdata_info(sdata, "deauthenticated from %pM (Reason: %u)\n",
1877 bssid, reason_code);
77fdaa12 1878
37ad3888
JB		 1879 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
1880
7da7cc1d 1881 mutex_lock(&sdata->local->mtx);
63f170e0 1882 ieee80211_recalc_idle(sdata->local);
7da7cc1d 1883 mutex_unlock(&sdata->local->mtx);
f0706e82 1884
77fdaa12 1885 return RX_MGMT_CFG80211_DEAUTH;
f0706e82
JB		 1886}
1887
1888
77fdaa12
JB		 1889static enum rx_mgmt_action __must_check
1890ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1891 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1892{
46900298 1893 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1894 u16 reason_code;
1895
66e67e41 1896 lockdep_assert_held(&ifmgd->mtx);
77fdaa12 1897
66e67e41 1898 if (len < 24 + 2)
77fdaa12
JB		 1899 return RX_MGMT_NONE;
1900
66e67e41 1901 if (!ifmgd->associated ||
b203ca39 1902 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
77fdaa12 1903 return RX_MGMT_NONE;
f0706e82
JB		 1904
1905 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1906
bdcbd8e0
JB		 1907 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
1908 mgmt->sa, reason_code);
f0706e82 1909
37ad3888
JB		 1910 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
1911
7da7cc1d 1912 mutex_lock(&sdata->local->mtx);
bc83b681 1913 ieee80211_recalc_idle(sdata->local);
7da7cc1d 1914 mutex_unlock(&sdata->local->mtx);
37ad3888 1915
77fdaa12 1916 return RX_MGMT_CFG80211_DISASSOC;
f0706e82
JB		 1917}
1918
c74d084f
CL		 1919static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
1920 u8 *supp_rates, unsigned int supp_rates_len,
1921 u32 *rates, u32 *basic_rates,
1922 bool *have_higher_than_11mbit,
1923 int *min_rate, int *min_rate_index)
1924{
1925 int i, j;
1926
1927 for (i = 0; i < supp_rates_len; i++) {
1928 int rate = (supp_rates[i] & 0x7f) * 5;
1929 bool is_basic = !!(supp_rates[i] & 0x80);
1930
1931 if (rate > 110)
1932 *have_higher_than_11mbit = true;
1933
1934 /*
1935 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
1936 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
1937 *
1938 * Note: Even through the membership selector and the basic
1939 * rate flag share the same bit, they are not exactly
1940 * the same.
1941 */
1942 if (!!(supp_rates[i] & 0x80) &&
1943 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1944 continue;
1945
1946 for (j = 0; j < sband->n_bitrates; j++) {
1947 if (sband->bitrates[j].bitrate == rate) {
1948 *rates |= BIT(j);
1949 if (is_basic)
1950 *basic_rates |= BIT(j);
1951 if (rate < *min_rate) {
1952 *min_rate = rate;
1953 *min_rate_index = j;
1954 }
1955 break;
1956 }
1957 }
1958 }
1959}
f0706e82 1960
66e67e41
JB		 1961static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
1962 bool assoc)
1963{
1964 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
1965
1966 lockdep_assert_held(&sdata->u.mgd.mtx);
1967
66e67e41
JB		 1968 if (!assoc) {
1969 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
1970
1971 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
1972 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
1973 }
1974
1975 kfree(assoc_data);
1976 sdata->u.mgd.assoc_data = NULL;
1977}
1978
1979static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
1980 struct cfg80211_bss *cbss,
af6b6374 1981 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1982{
46900298 1983 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 1984 struct ieee80211_local *local = sdata->local;
8318d78a 1985 struct ieee80211_supported_band *sband;
f0706e82 1986 struct sta_info *sta;
af6b6374 1987 u8 *pos;
af6b6374 1988 u16 capab_info, aid;
f0706e82 1989 struct ieee802_11_elems elems;
bda3933a 1990 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
ae5eb026 1991 u32 changed = 0;
c74d084f 1992 int err;
f0706e82 1993
af6b6374 1994 /* AssocResp and ReassocResp have identical structure */
f0706e82 1995
f0706e82 1996 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 1997 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 1998
1dd84aa2 1999 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
bdcbd8e0
JB		 2000 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2001 aid);
1dd84aa2
JB		 2002 aid &= ~(BIT(15) | BIT(14));
2003
05cb9108
JB		 2004 ifmgd->broken_ap = false;
2005
2006 if (aid == 0 || aid > IEEE80211_MAX_AID) {
bdcbd8e0
JB		 2007 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2008 aid);
05cb9108
JB		 2009 aid = 0;
2010 ifmgd->broken_ap = true;
2011 }
2012
af6b6374
JB		 2013 pos = mgmt->u.assoc_resp.variable;
2014 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2015
f0706e82 2016 if (!elems.supp_rates) {
bdcbd8e0 2017 sdata_info(sdata, "no SuppRates element in AssocResp\n");
af6b6374 2018 return false;
f0706e82
JB		 2019 }
2020
46900298 2021 ifmgd->aid = aid;
f0706e82 2022
2a33bee2
GE		 2023 mutex_lock(&sdata->local->sta_mtx);
2024 /*
2025 * station info was already allocated and inserted before
2026 * the association and should be available to us
2027 */
7852e361 2028 sta = sta_info_get(sdata, cbss->bssid);
2a33bee2
GE		 2029 if (WARN_ON(!sta)) {
2030 mutex_unlock(&sdata->local->sta_mtx);
af6b6374 2031 return false;
77fdaa12 2032 }
05e5e883 2033
66e67e41 2034 sband = local->hw.wiphy->bands[local->oper_channel->band];
f709fc69 2035
ab1faead 2036 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
ef96a842 2037 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
d9fe60de 2038 elems.ht_cap_elem, &sta->sta.ht_cap);
ae5eb026 2039
64f68e5d
JB		 2040 sta->supports_40mhz =
2041 sta->sta.ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40;
2042
4b7679a5 2043 rate_control_rate_init(sta);
f0706e82 2044
46900298 2045 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
c2c98fde 2046 set_sta_flag(sta, WLAN_STA_MFP);
5394af4d 2047
ddf4ac53 2048 if (elems.wmm_param)
c2c98fde 2049 set_sta_flag(sta, WLAN_STA_WME);
ddf4ac53 2050
c8987876
JB		 2051 err = sta_info_move_state(sta, IEEE80211_STA_AUTH);
2052 if (!err)
2053 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
2054 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2055 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2056 if (err) {
bdcbd8e0
JB		 2057 sdata_info(sdata,
2058 "failed to move station %pM to desired state\n",
2059 sta->sta.addr);
c8987876
JB		 2060 WARN_ON(__sta_info_destroy(sta));
2061 mutex_unlock(&sdata->local->sta_mtx);
2062 return false;
2063 }
2064
7852e361 2065 mutex_unlock(&sdata->local->sta_mtx);
ddf4ac53 2066
f2176d72
JO		 2067 /*
2068 * Always handle WMM once after association regardless
2069 * of the first value the AP uses. Setting -1 here has
2070 * that effect because the AP values is an unsigned
2071 * 4-bit value.
2072 */
2073 ifmgd->wmm_last_param_set = -1;
2074
ddf4ac53 2075 if (elems.wmm_param)
4ced3f74 2076 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 2077 elems.wmm_param_len);
aa837e1d 2078 else
3abead59
JB		 2079 ieee80211_set_wmm_default(sdata, false);
2080 changed |= BSS_CHANGED_QOS;
f0706e82 2081
074d46d1 2082 if (elems.ht_operation && elems.wmm_param &&
ab1faead 2083 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
24398e39
JB		 2084 changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation,
2085 cbss->bssid, false);
ae5eb026 2086
60f8b39c
JB		 2087 /* set AID and assoc capability,
2088 * ieee80211_set_associated() will tell the driver */
2089 bss_conf->aid = aid;
2090 bss_conf->assoc_capability = capab_info;
0c1ad2ca 2091 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 2092
d524215f
FF		 2093 /*
2094 * If we're using 4-addr mode, let the AP know that we're
2095 * doing so, so that it can create the STA VLAN on its side
2096 */
2097 if (ifmgd->use_4addr)
2098 ieee80211_send_4addr_nullfunc(local, sdata);
2099
15b7b062 2100 /*
b291ba11
JB		 2101 * Start timer to probe the connection to the AP now.
2102 * Also start the timer that will detect beacon loss.
15b7b062 2103 */
b291ba11 2104 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 2105 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 2106
af6b6374 2107 return true;
f0706e82
JB		 2108}
2109
66e67e41
JB		 2110static enum rx_mgmt_action __must_check
2111ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2112 struct ieee80211_mgmt *mgmt, size_t len,
2113 struct cfg80211_bss **bss)
2114{
2115 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2116 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2117 u16 capab_info, status_code, aid;
2118 struct ieee802_11_elems elems;
2119 u8 *pos;
2120 bool reassoc;
2121
2122 lockdep_assert_held(&ifmgd->mtx);
2123
2124 if (!assoc_data)
2125 return RX_MGMT_NONE;
b203ca39 2126 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
66e67e41
JB		 2127 return RX_MGMT_NONE;
2128
2129 /*
2130 * AssocResp and ReassocResp have identical structure, so process both
2131 * of them in this function.
2132 */
2133
2134 if (len < 24 + 6)
2135 return RX_MGMT_NONE;
2136
2137 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2138 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2139 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2140 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2141
bdcbd8e0
JB		 2142 sdata_info(sdata,
2143 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2144 reassoc ? "Rea" : "A", mgmt->sa,
2145 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
66e67e41
JB		 2146
2147 pos = mgmt->u.assoc_resp.variable;
2148 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2149
2150 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
2151 elems.timeout_int && elems.timeout_int_len == 5 &&
2152 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
2153 u32 tu, ms;
2154 tu = get_unaligned_le32(elems.timeout_int + 1);
2155 ms = tu * 1024 / 1000;
bdcbd8e0
JB		 2156 sdata_info(sdata,
2157 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2158 mgmt->sa, tu, ms);
66e67e41
JB		 2159 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
2160 if (ms > IEEE80211_ASSOC_TIMEOUT)
2161 run_again(ifmgd, assoc_data->timeout);
2162 return RX_MGMT_NONE;
2163 }
2164
2165 *bss = assoc_data->bss;
2166
2167 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2168 sdata_info(sdata, "%pM denied association (code=%d)\n",
2169 mgmt->sa, status_code);
66e67e41
JB		 2170 ieee80211_destroy_assoc_data(sdata, false);
2171 } else {
66e67e41
JB		 2172 if (!ieee80211_assoc_success(sdata, *bss, mgmt, len)) {
2173 /* oops -- internal error -- send timeout for now */
10a9109f 2174 ieee80211_destroy_assoc_data(sdata, false);
66e67e41
JB		 2175 cfg80211_put_bss(*bss);
2176 return RX_MGMT_CFG80211_ASSOC_TIMEOUT;
2177 }
635d999f 2178 sdata_info(sdata, "associated\n");
79ebfb85
JB		 2179
2180 /*
2181 * destroy assoc_data afterwards, as otherwise an idle
2182 * recalc after assoc_data is NULL but before associated
2183 * is set can cause the interface to go idle
2184 */
2185 ieee80211_destroy_assoc_data(sdata, true);
66e67e41
JB		 2186 }
2187
2188 return RX_MGMT_CFG80211_RX_ASSOC;
2189}
98c8fccf
JB		 2190static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
2191 struct ieee80211_mgmt *mgmt,
2192 size_t len,
2193 struct ieee80211_rx_status *rx_status,
2194 struct ieee802_11_elems *elems,
2195 bool beacon)
2196{
2197 struct ieee80211_local *local = sdata->local;
2198 int freq;
c2b13452 2199 struct ieee80211_bss *bss;
98c8fccf 2200 struct ieee80211_channel *channel;
56007a02
JB		 2201 bool need_ps = false;
2202
66e67e41 2203 if (sdata->u.mgd.associated &&
b203ca39 2204 ether_addr_equal(mgmt->bssid, sdata->u.mgd.associated->bssid)) {
56007a02
JB		 2205 bss = (void *)sdata->u.mgd.associated->priv;
2206 /* not previously set so we may need to recalc */
2207 need_ps = !bss->dtim_period;
2208 }
98c8fccf
JB		 2209
2210 if (elems->ds_params && elems->ds_params_len == 1)
59eb21a6
BR		 2211 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
2212 rx_status->band);
98c8fccf
JB		 2213 else
2214 freq = rx_status->freq;
2215
2216 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2217
2218 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2219 return;
2220
98c8fccf 2221 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2a519311 2222 channel, beacon);
77fdaa12
JB		 2223 if (bss)
2224 ieee80211_rx_bss_put(local, bss);
2225
2226 if (!sdata->u.mgd.associated)
98c8fccf
JB		 2227 return;
2228
56007a02
JB		 2229 if (need_ps) {
2230 mutex_lock(&local->iflist_mtx);
2231 ieee80211_recalc_ps(local, -1);
2232 mutex_unlock(&local->iflist_mtx);
2233 }
2234
c481ec97 2235 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
0c1ad2ca 2236 (memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid,
77fdaa12 2237 ETH_ALEN) == 0)) {
c481ec97
S		 2238 struct ieee80211_channel_sw_ie *sw_elem =
2239 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
5ce6e438
JB		 2240 ieee80211_sta_process_chanswitch(sdata, sw_elem,
2241 bss, rx_status->mactime);
c481ec97 2242 }
f0706e82
JB		 2243}
2244
2245
f698d856 2246static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 2247 struct sk_buff *skb)
f0706e82 2248{
af6b6374 2249 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 2250 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 2251 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2252 size_t baselen, len = skb->len;
ae6a44e3
EK		 2253 struct ieee802_11_elems elems;
2254
15b7b062
KV		 2255 ifmgd = &sdata->u.mgd;
2256
77fdaa12
JB		 2257 ASSERT_MGD_MTX(ifmgd);
2258
b203ca39 2259 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
8e7cdbb6
TW		 2260 return; /* ignore ProbeResp to foreign address */
2261
ae6a44e3
EK		 2262 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2263 if (baselen > len)
2264 return;
2265
2266 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2267 &elems);
2268
98c8fccf 2269 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
9859b81e 2270
77fdaa12 2271 if (ifmgd->associated &&
b203ca39 2272 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
4e5ff376 2273 ieee80211_reset_ap_probe(sdata);
66e67e41
JB		 2274
2275 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
b203ca39 2276 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
66e67e41 2277 /* got probe response, continue with auth */
bdcbd8e0 2278 sdata_info(sdata, "direct probe responded\n");
66e67e41
JB		 2279 ifmgd->auth_data->tries = 0;
2280 ifmgd->auth_data->timeout = jiffies;
2281 run_again(ifmgd, ifmgd->auth_data->timeout);
2282 }
f0706e82
JB		 2283}
2284
d91f36db
JB		 2285/*
2286 * This is the canonical list of information elements we care about,
2287 * the filter code also gives us all changes to the Microsoft OUI
2288 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2289 *
2290 * We implement beacon filtering in software since that means we can
2291 * avoid processing the frame here and in cfg80211, and userspace
2292 * will not be able to tell whether the hardware supports it or not.
2293 *
2294 * XXX: This list needs to be dynamic -- userspace needs to be able to
2295 * add items it requires. It also needs to be able to tell us to
2296 * look out for other vendor IEs.
2297 */
2298static const u64 care_about_ies =
1d4df3a5
JB		 2299 (1ULL << WLAN_EID_COUNTRY) |
2300 (1ULL << WLAN_EID_ERP_INFO) |
2301 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2302 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2303 (1ULL << WLAN_EID_HT_CAPABILITY) |
074d46d1 2304 (1ULL << WLAN_EID_HT_OPERATION);
d91f36db 2305
f698d856 2306static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2307 struct ieee80211_mgmt *mgmt,
2308 size_t len,
2309 struct ieee80211_rx_status *rx_status)
2310{
d91f36db 2311 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 2312 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 2313 size_t baselen;
2314 struct ieee802_11_elems elems;
f698d856 2315 struct ieee80211_local *local = sdata->local;
471b3efd 2316 u32 changed = 0;
d91f36db 2317 bool erp_valid, directed_tim = false;
7a5158ef 2318 u8 erp_value = 0;
d91f36db 2319 u32 ncrc;
77fdaa12
JB		 2320 u8 *bssid;
2321
66e67e41 2322 lockdep_assert_held(&ifmgd->mtx);
f0706e82 2323
ae6a44e3
EK		 2324 /* Process beacon from the current BSS */
2325 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2326 if (baselen > len)
2327 return;
2328
d91f36db 2329 if (rx_status->freq != local->hw.conf.channel->center_freq)
f0706e82 2330 return;
f0706e82 2331
66e67e41 2332 if (ifmgd->assoc_data && !ifmgd->assoc_data->have_beacon &&
b203ca39 2333 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
66e67e41
JB		 2334 ieee802_11_parse_elems(mgmt->u.beacon.variable,
2335 len - baselen, &elems);
77fdaa12 2336
66e67e41
JB		 2337 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
2338 false);
2339 ifmgd->assoc_data->have_beacon = true;
2340 ifmgd->assoc_data->sent_assoc = false;
2341 /* continue assoc process */
2342 ifmgd->assoc_data->timeout = jiffies;
2343 run_again(ifmgd, ifmgd->assoc_data->timeout);
2344 return;
2345 }
77fdaa12 2346
66e67e41 2347 if (!ifmgd->associated ||
b203ca39 2348 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
f0706e82 2349 return;
66e67e41 2350 bssid = ifmgd->associated->bssid;
f0706e82 2351
17e4ec14
JM		 2352 /* Track average RSSI from the Beacon frames of the current AP */
2353 ifmgd->last_beacon_signal = rx_status->signal;
2354 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
2355 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3ba06c6f 2356 ifmgd->ave_beacon_signal = rx_status->signal * 16;
17e4ec14 2357 ifmgd->last_cqm_event_signal = 0;
391a200a 2358 ifmgd->count_beacon_signal = 1;
615f7b9b 2359 ifmgd->last_ave_beacon_signal = 0;
17e4ec14
JM		 2360 } else {
2361 ifmgd->ave_beacon_signal =
2362 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
2363 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
2364 ifmgd->ave_beacon_signal) / 16;
391a200a 2365 ifmgd->count_beacon_signal++;
17e4ec14 2366 }
615f7b9b
MV		 2367
2368 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
2369 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
2370 int sig = ifmgd->ave_beacon_signal;
2371 int last_sig = ifmgd->last_ave_beacon_signal;
2372
2373 /*
2374 * if signal crosses either of the boundaries, invoke callback
2375 * with appropriate parameters
2376 */
2377 if (sig > ifmgd->rssi_max_thold &&
2378 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
2379 ifmgd->last_ave_beacon_signal = sig;
2380 drv_rssi_callback(local, RSSI_EVENT_HIGH);
2381 } else if (sig < ifmgd->rssi_min_thold &&
2382 (last_sig >= ifmgd->rssi_max_thold ||
2383 last_sig == 0)) {
2384 ifmgd->last_ave_beacon_signal = sig;
2385 drv_rssi_callback(local, RSSI_EVENT_LOW);
2386 }
2387 }
2388
17e4ec14 2389 if (bss_conf->cqm_rssi_thold &&
391a200a 2390 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
ea086359 2391 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
17e4ec14
JM		 2392 int sig = ifmgd->ave_beacon_signal / 16;
2393 int last_event = ifmgd->last_cqm_event_signal;
2394 int thold = bss_conf->cqm_rssi_thold;
2395 int hyst = bss_conf->cqm_rssi_hyst;
2396 if (sig < thold &&
2397 (last_event == 0 || sig < last_event - hyst)) {
2398 ifmgd->last_cqm_event_signal = sig;
2399 ieee80211_cqm_rssi_notify(
2400 &sdata->vif,
2401 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
2402 GFP_KERNEL);
2403 } else if (sig > thold &&
2404 (last_event == 0 || sig > last_event + hyst)) {
2405 ifmgd->last_cqm_event_signal = sig;
2406 ieee80211_cqm_rssi_notify(
2407 &sdata->vif,
2408 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
2409 GFP_KERNEL);
2410 }
2411 }
2412
b291ba11 2413 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
bdcbd8e0
JB		 2414 mlme_dbg_ratelimited(sdata,
2415 "cancelling probereq poll due to a received beacon\n");
925e64c3 2416 mutex_lock(&local->mtx);
b291ba11 2417 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
925e64c3
SG		 2418 ieee80211_run_deferred_scan(local);
2419 mutex_unlock(&local->mtx);
2420
4e751843
JB		 2421 mutex_lock(&local->iflist_mtx);
2422 ieee80211_recalc_ps(local, -1);
2423 mutex_unlock(&local->iflist_mtx);
92778180
JM		 2424 }
2425
b291ba11
JB		 2426 /*
2427 * Push the beacon loss detection into the future since
2428 * we are processing a beacon from the AP just now.
2429 */
d3a910a8 2430 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 2431
d91f36db
JB		 2432 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
2433 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
2434 len - baselen, &elems,
2435 care_about_ies, ncrc);
2436
2437 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
e7ec86f5
JB		 2438 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
2439 ifmgd->aid);
d91f36db 2440
25c9c875 2441 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
1fb3606b 2442 if (directed_tim) {
572e0012 2443 if (local->hw.conf.dynamic_ps_timeout > 0) {
70b12f26
RW		 2444 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2445 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2446 ieee80211_hw_config(local,
2447 IEEE80211_CONF_CHANGE_PS);
2448 }
572e0012 2449 ieee80211_send_nullfunc(local, sdata, 0);
6f0756a3 2450 } else if (!local->pspolling && sdata->u.mgd.powersave) {
572e0012
KV		 2451 local->pspolling = true;
2452
2453 /*
2454 * Here is assumed that the driver will be
2455 * able to send ps-poll frame and receive a
2456 * response even though power save mode is
2457 * enabled, but some drivers might require
2458 * to disable power save here. This needs
2459 * to be investigated.
2460 */
2461 ieee80211_send_pspoll(local, sdata);
2462 }
a97b77b9
VN		 2463 }
2464 }
7a5158ef 2465
d8ec4433 2466 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
30196673
JM		 2467 return;
2468 ifmgd->beacon_crc = ncrc;
d8ec4433 2469 ifmgd->beacon_crc_valid = true;
30196673 2470
7d25745d
JB		 2471 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
2472 true);
2473
2474 if (ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2475 elems.wmm_param_len))
2476 changed |= BSS_CHANGED_QOS;
2477
7a5158ef
JB		 2478 if (elems.erp_info && elems.erp_info_len >= 1) {
2479 erp_valid = true;
2480 erp_value = elems.erp_info[0];
2481 } else {
2482 erp_valid = false;
50c4afb9 2483 }
7a5158ef
JB		 2484 changed |= ieee80211_handle_bss_capability(sdata,
2485 le16_to_cpu(mgmt->u.beacon.capab_info),
2486 erp_valid, erp_value);
f0706e82 2487
d3c990fb 2488
074d46d1 2489 if (elems.ht_cap_elem && elems.ht_operation && elems.wmm_param &&
ab1faead 2490 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
ae5eb026 2491 struct ieee80211_supported_band *sband;
ae5eb026
JB		 2492
2493 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2494
24398e39
JB		 2495 changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation,
2496 bssid, true);
d3c990fb
RR		 2497 }
2498
8b19e6ca 2499 /* Note: country IE parsing is done for us by cfg80211 */
3f2355cb 2500 if (elems.country_elem) {
a8302de9
VT		 2501 /* TODO: IBSS also needs this */
2502 if (elems.pwr_constr_elem)
2503 ieee80211_handle_pwr_constr(sdata,
2504 le16_to_cpu(mgmt->u.probe_resp.capab_info),
2505 elems.pwr_constr_elem,
2506 elems.pwr_constr_elem_len);
3f2355cb
LR		 2507 }
2508
471b3efd 2509 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 2510}
2511
1fa57d01
JB		 2512void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
2513 struct sk_buff *skb)
f0706e82 2514{
77fdaa12 2515 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 2516 struct ieee80211_rx_status *rx_status;
f0706e82 2517 struct ieee80211_mgmt *mgmt;
66e67e41 2518 struct cfg80211_bss *bss = NULL;
77fdaa12 2519 enum rx_mgmt_action rma = RX_MGMT_NONE;
f0706e82
JB		 2520 u16 fc;
2521
f0706e82
JB		 2522 rx_status = (struct ieee80211_rx_status *) skb->cb;
2523 mgmt = (struct ieee80211_mgmt *) skb->data;
2524 fc = le16_to_cpu(mgmt->frame_control);
2525
77fdaa12
JB		 2526 mutex_lock(&ifmgd->mtx);
2527
66e67e41
JB		 2528 switch (fc & IEEE80211_FCTL_STYPE) {
2529 case IEEE80211_STYPE_BEACON:
2530 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
2531 break;
2532 case IEEE80211_STYPE_PROBE_RESP:
2533 ieee80211_rx_mgmt_probe_resp(sdata, skb);
2534 break;
2535 case IEEE80211_STYPE_AUTH:
2536 rma = ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
2537 break;
2538 case IEEE80211_STYPE_DEAUTH:
2539 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
2540 break;
2541 case IEEE80211_STYPE_DISASSOC:
2542 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
2543 break;
2544 case IEEE80211_STYPE_ASSOC_RESP:
2545 case IEEE80211_STYPE_REASSOC_RESP:
2546 rma = ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, &bss);
2547 break;
2548 case IEEE80211_STYPE_ACTION:
2549 switch (mgmt->u.action.category) {
2550 case WLAN_CATEGORY_SPECTRUM_MGMT:
2551 ieee80211_sta_process_chanswitch(sdata,
2552 &mgmt->u.action.u.chan_switch.sw_elem,
2553 (void *)ifmgd->associated->priv,
2554 rx_status->mactime);
77fdaa12 2555 break;
77fdaa12 2556 }
77fdaa12 2557 }
77fdaa12
JB		 2558 mutex_unlock(&ifmgd->mtx);
2559
66e67e41
JB		 2560 switch (rma) {
2561 case RX_MGMT_NONE:
2562 /* no action */
2563 break;
2564 case RX_MGMT_CFG80211_DEAUTH:
ce470613 2565 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
66e67e41
JB		 2566 break;
2567 case RX_MGMT_CFG80211_DISASSOC:
2568 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
2569 break;
2570 case RX_MGMT_CFG80211_RX_AUTH:
2571 cfg80211_send_rx_auth(sdata->dev, (u8 *)mgmt, skb->len);
2572 break;
2573 case RX_MGMT_CFG80211_RX_ASSOC:
2574 cfg80211_send_rx_assoc(sdata->dev, bss, (u8 *)mgmt, skb->len);
2575 break;
2576 case RX_MGMT_CFG80211_ASSOC_TIMEOUT:
2577 cfg80211_send_assoc_timeout(sdata->dev, mgmt->bssid);
2578 break;
2579 default:
2580 WARN(1, "unexpected: %d", rma);
b054b747 2581 }
f0706e82
JB		 2582}
2583
9c6bd790 2584static void ieee80211_sta_timer(unsigned long data)
f0706e82 2585{
60f8b39c
JB		 2586 struct ieee80211_sub_if_data *sdata =
2587 (struct ieee80211_sub_if_data *) data;
46900298 2588 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
60f8b39c 2589 struct ieee80211_local *local = sdata->local;
f0706e82 2590
5bb644a0
JB		 2591 if (local->quiescing) {
2592 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2593 return;
2594 }
2595
64592c8f 2596 ieee80211_queue_work(&local->hw, &sdata->work);
f0706e82
JB		 2597}
2598
04ac3c0e 2599static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
95acac61 2600 u8 *bssid, u8 reason)
04ac3c0e
FF		 2601{
2602 struct ieee80211_local *local = sdata->local;
2603 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5fef7dbc 2604 u8 frame_buf[DEAUTH_DISASSOC_LEN];
04ac3c0e 2605
37ad3888
JB		 2606 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
2607 false, frame_buf);
04ac3c0e 2608 mutex_unlock(&ifmgd->mtx);
37ad3888 2609
04ac3c0e
FF		 2610 /*
2611 * must be outside lock due to cfg80211,
2612 * but that's not a problem.
2613 */
5fef7dbc 2614 cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
fcac4fb0
FF		 2615
2616 mutex_lock(&local->mtx);
2617 ieee80211_recalc_idle(local);
2618 mutex_unlock(&local->mtx);
2619
04ac3c0e
FF		 2620 mutex_lock(&ifmgd->mtx);
2621}
2622
66e67e41
JB		 2623static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
2624{
2625 struct ieee80211_local *local = sdata->local;
2626 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2627 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
2628
2629 lockdep_assert_held(&ifmgd->mtx);
2630
2631 if (WARN_ON_ONCE(!auth_data))
2632 return -EINVAL;
2633
66e67e41
JB		 2634 auth_data->tries++;
2635
2636 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
bdcbd8e0
JB		 2637 sdata_info(sdata, "authentication with %pM timed out\n",
2638 auth_data->bss->bssid);
66e67e41
JB		 2639
2640 /*
2641 * Most likely AP is not in the range so remove the
2642 * bss struct for that AP.
2643 */
2644 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
2645
2646 return -ETIMEDOUT;
2647 }
2648
a1845fc7
JB		 2649 drv_mgd_prepare_tx(local, sdata);
2650
66e67e41 2651 if (auth_data->bss->proberesp_ies) {
bdcbd8e0
JB		 2652 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
2653 auth_data->bss->bssid, auth_data->tries,
2654 IEEE80211_AUTH_MAX_TRIES);
66e67e41
JB		 2655
2656 auth_data->expected_transaction = 2;
2657 ieee80211_send_auth(sdata, 1, auth_data->algorithm,
2658 auth_data->ie, auth_data->ie_len,
2659 auth_data->bss->bssid,
2660 auth_data->bss->bssid, NULL, 0, 0);
2661 } else {
2662 const u8 *ssidie;
2663
bdcbd8e0
JB		 2664 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
2665 auth_data->bss->bssid, auth_data->tries,
2666 IEEE80211_AUTH_MAX_TRIES);
66e67e41
JB		 2667
2668 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
2669 if (!ssidie)
2670 return -EINVAL;
2671 /*
2672 * Direct probe is sent to broadcast address as some APs
2673 * will not answer to direct packet in unassociated state.
2674 */
2675 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
2676 NULL, 0, (u32) -1, true, false);
2677 }
2678
2679 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
2680 run_again(ifmgd, auth_data->timeout);
2681
2682 return 0;
2683}
2684
2685static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
2686{
2687 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2688 struct ieee80211_local *local = sdata->local;
2689
2690 lockdep_assert_held(&sdata->u.mgd.mtx);
2691
66e67e41
JB		 2692 assoc_data->tries++;
2693 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
bdcbd8e0
JB		 2694 sdata_info(sdata, "association with %pM timed out\n",
2695 assoc_data->bss->bssid);
66e67e41
JB		 2696
2697 /*
2698 * Most likely AP is not in the range so remove the
2699 * bss struct for that AP.
2700 */
2701 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
2702
2703 return -ETIMEDOUT;
2704 }
2705
bdcbd8e0
JB		 2706 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
2707 assoc_data->bss->bssid, assoc_data->tries,
2708 IEEE80211_ASSOC_MAX_TRIES);
66e67e41
JB		 2709 ieee80211_send_assoc(sdata);
2710
2711 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
2712 run_again(&sdata->u.mgd, assoc_data->timeout);
2713
2714 return 0;
2715}
2716
1fa57d01 2717void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 2718{
9c6bd790 2719 struct ieee80211_local *local = sdata->local;
1fa57d01 2720 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 2721
77fdaa12
JB		 2722 mutex_lock(&ifmgd->mtx);
2723
66e67e41
JB		 2724 if (ifmgd->auth_data &&
2725 time_after(jiffies, ifmgd->auth_data->timeout)) {
2726 if (ifmgd->auth_data->done) {
2727 /*
2728 * ok ... we waited for assoc but userspace didn't,
2729 * so let's just kill the auth data
2730 */
2731 ieee80211_destroy_auth_data(sdata, false);
2732 } else if (ieee80211_probe_auth(sdata)) {
2733 u8 bssid[ETH_ALEN];
2734
2735 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2736
2737 ieee80211_destroy_auth_data(sdata, false);
2738
2739 mutex_unlock(&ifmgd->mtx);
2740 cfg80211_send_auth_timeout(sdata->dev, bssid);
2741 mutex_lock(&ifmgd->mtx);
2742 }
2743 } else if (ifmgd->auth_data)
2744 run_again(ifmgd, ifmgd->auth_data->timeout);
2745
2746 if (ifmgd->assoc_data &&
2747 time_after(jiffies, ifmgd->assoc_data->timeout)) {
2748 if (!ifmgd->assoc_data->have_beacon ||
2749 ieee80211_do_assoc(sdata)) {
2750 u8 bssid[ETH_ALEN];
2751
2752 memcpy(bssid, ifmgd->assoc_data->bss->bssid, ETH_ALEN);
2753
2754 ieee80211_destroy_assoc_data(sdata, false);
2755
2756 mutex_unlock(&ifmgd->mtx);
2757 cfg80211_send_assoc_timeout(sdata->dev, bssid);
2758 mutex_lock(&ifmgd->mtx);
2759 }
2760 } else if (ifmgd->assoc_data)
2761 run_again(ifmgd, ifmgd->assoc_data->timeout);
2762
b291ba11
JB		 2763 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2764 IEEE80211_STA_CONNECTION_POLL) &&
2765 ifmgd->associated) {
a43abf29 2766 u8 bssid[ETH_ALEN];
72a8a3ed 2767 int max_tries;
a43abf29 2768
0c1ad2ca 2769 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 2770
72a8a3ed 2771 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
180205bd 2772 max_tries = max_nullfunc_tries;
72a8a3ed 2773 else
180205bd 2774 max_tries = max_probe_tries;
72a8a3ed 2775
4e5ff376
FF		 2776 /* ACK received for nullfunc probing frame */
2777 if (!ifmgd->probe_send_count)
2778 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 2779 else if (ifmgd->nullfunc_failed) {
2780 if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 2781 mlme_dbg(sdata,
2782 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
2783 bssid, ifmgd->probe_send_count,
2784 max_tries);
04ac3c0e
FF		 2785 ieee80211_mgd_probe_ap_send(sdata);
2786 } else {
bdcbd8e0
JB		 2787 mlme_dbg(sdata,
2788 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
2789 bssid);
95acac61
JB		 2790 ieee80211_sta_connection_lost(sdata, bssid,
2791 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
04ac3c0e
FF		 2792 }
2793 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
b291ba11 2794 run_again(ifmgd, ifmgd->probe_timeout);
04ac3c0e 2795 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
bdcbd8e0
JB		 2796 mlme_dbg(sdata,
2797 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
2798 bssid, probe_wait_ms);
95acac61
JB		 2799 ieee80211_sta_connection_lost(sdata, bssid,
2800 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
04ac3c0e 2801 } else if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 2802 mlme_dbg(sdata,
2803 "No probe response from AP %pM after %dms, try %d/%i\n",
2804 bssid, probe_wait_ms,
2805 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 2806 ieee80211_mgd_probe_ap_send(sdata);
2807 } else {
b291ba11
JB		 2808 /*
2809 * We actually lost the connection ... or did we?
2810 * Let's make sure!
2811 */
b38afa87
BG		 2812 wiphy_debug(local->hw.wiphy,
2813 "%s: No probe response from AP %pM"
2814 " after %dms, disconnecting.\n",
2815 sdata->name,
180205bd 2816 bssid, probe_wait_ms);
04ac3c0e 2817
95acac61
JB		 2818 ieee80211_sta_connection_lost(sdata, bssid,
2819 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
b291ba11
JB		 2820 }
2821 }
2822
77fdaa12 2823 mutex_unlock(&ifmgd->mtx);
66e67e41
JB		 2824
2825 mutex_lock(&local->mtx);
2826 ieee80211_recalc_idle(local);
2827 mutex_unlock(&local->mtx);
f0706e82
JB		 2828}
2829
b291ba11
JB		 2830static void ieee80211_sta_bcn_mon_timer(unsigned long data)
2831{
2832 struct ieee80211_sub_if_data *sdata =
2833 (struct ieee80211_sub_if_data *) data;
2834 struct ieee80211_local *local = sdata->local;
2835
2836 if (local->quiescing)
2837 return;
2838
1e4dcd01
JO		 2839 ieee80211_queue_work(&sdata->local->hw,
2840 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 2841}
2842
2843static void ieee80211_sta_conn_mon_timer(unsigned long data)
2844{
2845 struct ieee80211_sub_if_data *sdata =
2846 (struct ieee80211_sub_if_data *) data;
2847 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2848 struct ieee80211_local *local = sdata->local;
2849
2850 if (local->quiescing)
2851 return;
2852
42935eca 2853 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 2854}
2855
2856static void ieee80211_sta_monitor_work(struct work_struct *work)
2857{
2858 struct ieee80211_sub_if_data *sdata =
2859 container_of(work, struct ieee80211_sub_if_data,
2860 u.mgd.monitor_work);
2861
2862 ieee80211_mgd_probe_ap(sdata, false);
2863}
2864
9c6bd790
JB		 2865static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
2866{
494f1fe5
EP		 2867 u32 flags;
2868
ad935687 2869 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
925e64c3 2870 __ieee80211_stop_poll(sdata);
ad935687 2871
b291ba11 2872 /* let's probe the connection once */
494f1fe5
EP		 2873 flags = sdata->local->hw.flags;
2874 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
2875 ieee80211_queue_work(&sdata->local->hw,
2876 &sdata->u.mgd.monitor_work);
b291ba11 2877 /* and do all the other regular work too */
64592c8f 2878 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 2879 }
9c6bd790 2880}
f0706e82 2881
5bb644a0
JB		 2882#ifdef CONFIG_PM
2883void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
2884{
2885 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2886
2887 /*
2888 * we need to use atomic bitops for the running bits
2889 * only because both timers might fire at the same
2890 * time -- the code here is properly synchronised.
2891 */
2892
d1f5b7a3
JB		 2893 cancel_work_sync(&ifmgd->request_smps_work);
2894
0ecfe806 2895 cancel_work_sync(&ifmgd->monitor_work);
1e4dcd01 2896 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5bb644a0
JB		 2897 if (del_timer_sync(&ifmgd->timer))
2898 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2899
2900 cancel_work_sync(&ifmgd->chswitch_work);
2901 if (del_timer_sync(&ifmgd->chswitch_timer))
2902 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
b291ba11 2903
b291ba11
JB		 2904 /* these will just be re-established on connection */
2905 del_timer_sync(&ifmgd->conn_mon_timer);
2906 del_timer_sync(&ifmgd->bcn_mon_timer);
5bb644a0
JB		 2907}
2908
2909void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
2910{
2911 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2912
676b58c2
RM		 2913 if (!ifmgd->associated)
2914 return;
2915
95acac61
JB		 2916 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
2917 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
2918 mutex_lock(&ifmgd->mtx);
2919 if (ifmgd->associated) {
bdcbd8e0
JB		 2920 mlme_dbg(sdata,
2921 "driver requested disconnect after resume\n");
95acac61
JB		 2922 ieee80211_sta_connection_lost(sdata,
2923 ifmgd->associated->bssid,
2924 WLAN_REASON_UNSPECIFIED);
2925 mutex_unlock(&ifmgd->mtx);
2926 return;
2927 }
2928 mutex_unlock(&ifmgd->mtx);
2929 }
2930
5bb644a0
JB		 2931 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
2932 add_timer(&ifmgd->timer);
2933 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
2934 add_timer(&ifmgd->chswitch_timer);
c8a7972c 2935 ieee80211_sta_reset_beacon_monitor(sdata);
925e64c3
SG		 2936
2937 mutex_lock(&sdata->local->mtx);
46090979 2938 ieee80211_restart_sta_timer(sdata);
925e64c3 2939 mutex_unlock(&sdata->local->mtx);
5bb644a0
JB		 2940}
2941#endif
2942
9c6bd790
JB		 2943/* interface setup */
2944void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 2945{
46900298 2946 struct ieee80211_if_managed *ifmgd;
988c0f72 2947
46900298 2948 ifmgd = &sdata->u.mgd;
b291ba11 2949 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 2950 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 2951 INIT_WORK(&ifmgd->beacon_connection_loss_work,
2952 ieee80211_beacon_connection_loss_work);
d1f5b7a3 2953 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
46900298 2954 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 2955 (unsigned long) sdata);
b291ba11
JB		 2956 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
2957 (unsigned long) sdata);
2958 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
2959 (unsigned long) sdata);
46900298 2960 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 2961 (unsigned long) sdata);
9c6bd790 2962
ab1faead 2963 ifmgd->flags = 0;
1478acb3 2964 ifmgd->powersave = sdata->wdev.ps;
dc41e4d4
EP		 2965 ifmgd->uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
2966 ifmgd->uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
bbbdff9e 2967
77fdaa12 2968 mutex_init(&ifmgd->mtx);
0f78231b
JB		 2969
2970 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
2971 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
2972 else
2973 ifmgd->req_smps = IEEE80211_SMPS_OFF;
f0706e82
JB		 2974}
2975
77fdaa12
JB		 2976/* scan finished notification */
2977void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 2978{
31ee67a1 2979 struct ieee80211_sub_if_data *sdata;
60f8b39c 2980
77fdaa12
JB		 2981 /* Restart STA timers */
2982 rcu_read_lock();
2983 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2984 ieee80211_restart_sta_timer(sdata);
2985 rcu_read_unlock();
2986}
60f8b39c 2987
77fdaa12
JB		 2988int ieee80211_max_network_latency(struct notifier_block *nb,
2989 unsigned long data, void *dummy)
2990{
2991 s32 latency_usec = (s32) data;
2992 struct ieee80211_local *local =
2993 container_of(nb, struct ieee80211_local,
2994 network_latency_notifier);
1fa6f4af 2995
77fdaa12
JB		 2996 mutex_lock(&local->iflist_mtx);
2997 ieee80211_recalc_ps(local, latency_usec);
2998 mutex_unlock(&local->iflist_mtx);
dfe67012 2999
77fdaa12 3000 return 0;
9c6bd790
JB		 3001}
3002
a1cf775d 3003static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
5d6a1b06 3004 struct cfg80211_bss *cbss, bool assoc)
a1cf775d
JB		 3005{
3006 struct ieee80211_local *local = sdata->local;
3007 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5d6a1b06 3008 struct ieee80211_bss *bss = (void *)cbss->priv;
6df653c7 3009 struct sta_info *sta = NULL;
a1cf775d
JB		 3010 bool have_sta = false;
3011 int err;
24398e39
JB		 3012 int ht_cfreq;
3013 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
3014 const u8 *ht_oper_ie;
3015 const struct ieee80211_ht_operation *ht_oper = NULL;
3016 struct ieee80211_supported_band *sband;
a1cf775d
JB		 3017
3018 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3019 return -EINVAL;
3020
3021 if (assoc) {
3022 rcu_read_lock();
5d6a1b06 3023 have_sta = sta_info_get(sdata, cbss->bssid);
a1cf775d
JB		 3024 rcu_read_unlock();
3025 }
3026
3027 if (!have_sta) {
5d6a1b06 3028 sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
a1cf775d
JB		 3029 if (!sta)
3030 return -ENOMEM;
3031 }
3032
3033 mutex_lock(&local->mtx);
3034 ieee80211_recalc_idle(sdata->local);
3035 mutex_unlock(&local->mtx);
3036
3037 /* switch to the right channel */
24398e39
JB		 3038 sband = local->hw.wiphy->bands[cbss->channel->band];
3039
3040 ifmgd->flags &= ~IEEE80211_STA_DISABLE_40MHZ;
3041
3042 if (sband->ht_cap.ht_supported) {
3043 ht_oper_ie = cfg80211_find_ie(WLAN_EID_HT_OPERATION,
3044 cbss->information_elements,
3045 cbss->len_information_elements);
3046 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3047 ht_oper = (void *)(ht_oper_ie + 2);
3048 }
3049
3050 if (ht_oper) {
3051 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
3052 cbss->channel->band);
3053 /* check that channel matches the right operating channel */
3054 if (cbss->channel->center_freq != ht_cfreq) {
3055 /*
3056 * It's possible that some APs are confused here;
3057 * Netgear WNDR3700 sometimes reports 4 higher than
3058 * the actual channel in association responses, but
3059 * since we look at probe response/beacon data here
3060 * it should be OK.
3061 */
bdcbd8e0
JB		 3062 sdata_info(sdata,
3063 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
3064 cbss->channel->center_freq,
3065 ht_cfreq, ht_oper->primary_chan,
3066 cbss->channel->band);
24398e39
JB		 3067 ht_oper = NULL;
3068 }
3069 }
3070
3071 if (ht_oper) {
3072 channel_type = NL80211_CHAN_HT20;
3073
3074 if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
3075 switch (ht_oper->ht_param &
3076 IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
3077 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3078 channel_type = NL80211_CHAN_HT40PLUS;
3079 break;
3080 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3081 channel_type = NL80211_CHAN_HT40MINUS;
3082 break;
3083 }
3084 }
3085 }
3086
3087 if (!ieee80211_set_channel_type(local, sdata, channel_type)) {
3088 /* can only fail due to HT40+/- mismatch */
3089 channel_type = NL80211_CHAN_HT20;
bdcbd8e0
JB		 3090 sdata_info(sdata,
3091 "disabling 40 MHz due to multi-vif mismatch\n");
24398e39
JB		 3092 ifmgd->flags |= IEEE80211_STA_DISABLE_40MHZ;
3093 WARN_ON(!ieee80211_set_channel_type(local, sdata,
3094 channel_type));
3095 }
3096
5d6a1b06 3097 local->oper_channel = cbss->channel;
6aee4ca3 3098 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
a1cf775d 3099
6df653c7 3100 if (sta) {
5d6a1b06
JB		 3101 u32 rates = 0, basic_rates = 0;
3102 bool have_higher_than_11mbit;
3103 int min_rate = INT_MAX, min_rate_index = -1;
3104
5d6a1b06
JB		 3105 ieee80211_get_rates(sband, bss->supp_rates,
3106 bss->supp_rates_len,
3107 &rates, &basic_rates,
3108 &have_higher_than_11mbit,
3109 &min_rate, &min_rate_index);
3110
3111 /*
3112 * This used to be a workaround for basic rates missing
3113 * in the association response frame. Now that we no
3114 * longer use the basic rates from there, it probably
3115 * doesn't happen any more, but keep the workaround so
3116 * in case some *other* APs are buggy in different ways
3117 * we can connect -- with a warning.
3118 */
3119 if (!basic_rates && min_rate_index >= 0) {
bdcbd8e0
JB		 3120 sdata_info(sdata,
3121 "No basic rates, using min rate instead\n");
5d6a1b06
JB		 3122 basic_rates = BIT(min_rate_index);
3123 }
3124
3125 sta->sta.supp_rates[cbss->channel->band] = rates;
3126 sdata->vif.bss_conf.basic_rates = basic_rates;
3127
3128 /* cf. IEEE 802.11 9.2.12 */
3129 if (local->oper_channel->band == IEEE80211_BAND_2GHZ &&
3130 have_higher_than_11mbit)
3131 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3132 else
3133 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
3134
3135 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
3136
8c358bcd
JB		 3137 /* set timing information */
3138 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
3139 sdata->vif.bss_conf.sync_tsf = cbss->tsf;
3140 sdata->vif.bss_conf.sync_device_ts = bss->device_ts;
3141
3142 /* tell driver about BSSID, basic rates and timing */
5d6a1b06 3143 ieee80211_bss_info_change_notify(sdata,
8c358bcd
JB		 3144 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
3145 BSS_CHANGED_BEACON_INT);
a1cf775d
JB		 3146
3147 if (assoc)
3148 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
3149
3150 err = sta_info_insert(sta);
3151 sta = NULL;
3152 if (err) {
bdcbd8e0
JB		 3153 sdata_info(sdata,
3154 "failed to insert STA entry for the AP (error %d)\n",
3155 err);
a1cf775d
JB		 3156 return err;
3157 }
3158 } else
b203ca39 3159 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
a1cf775d
JB		 3160
3161 return 0;
3162}
3163
77fdaa12
JB		 3164/* config hooks */
3165int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
3166 struct cfg80211_auth_request *req)
9c6bd790 3167{
66e67e41
JB		 3168 struct ieee80211_local *local = sdata->local;
3169 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3170 struct ieee80211_mgd_auth_data *auth_data;
77fdaa12 3171 u16 auth_alg;
66e67e41
JB		 3172 int err;
3173
3174 /* prepare auth data structure */
9c6bd790 3175
77fdaa12
JB		 3176 switch (req->auth_type) {
3177 case NL80211_AUTHTYPE_OPEN_SYSTEM:
3178 auth_alg = WLAN_AUTH_OPEN;
3179 break;
3180 case NL80211_AUTHTYPE_SHARED_KEY:
66e67e41 3181 if (IS_ERR(local->wep_tx_tfm))
9dca9c49 3182 return -EOPNOTSUPP;
77fdaa12
JB		 3183 auth_alg = WLAN_AUTH_SHARED_KEY;
3184 break;
3185 case NL80211_AUTHTYPE_FT:
3186 auth_alg = WLAN_AUTH_FT;
3187 break;
3188 case NL80211_AUTHTYPE_NETWORK_EAP:
3189 auth_alg = WLAN_AUTH_LEAP;
3190 break;
3191 default:
3192 return -EOPNOTSUPP;
60f8b39c 3193 }
77fdaa12 3194
66e67e41
JB		 3195 auth_data = kzalloc(sizeof(*auth_data) + req->ie_len, GFP_KERNEL);
3196 if (!auth_data)
9c6bd790 3197 return -ENOMEM;
77fdaa12 3198
66e67e41 3199 auth_data->bss = req->bss;
77fdaa12
JB		 3200
3201 if (req->ie && req->ie_len) {
66e67e41
JB		 3202 memcpy(auth_data->ie, req->ie, req->ie_len);
3203 auth_data->ie_len = req->ie_len;
9c6bd790 3204 }
77fdaa12 3205
fffd0934 3206 if (req->key && req->key_len) {
66e67e41
JB		 3207 auth_data->key_len = req->key_len;
3208 auth_data->key_idx = req->key_idx;
3209 memcpy(auth_data->key, req->key, req->key_len);
fffd0934
JB		 3210 }
3211
66e67e41 3212 auth_data->algorithm = auth_alg;
60f8b39c 3213
66e67e41 3214 /* try to authenticate/probe */
2a33bee2 3215
66e67e41 3216 mutex_lock(&ifmgd->mtx);
2a33bee2 3217
66e67e41
JB		 3218 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
3219 ifmgd->assoc_data) {
3220 err = -EBUSY;
3221 goto err_free;
2a33bee2
GE		 3222 }
3223
66e67e41
JB		 3224 if (ifmgd->auth_data)
3225 ieee80211_destroy_auth_data(sdata, false);
2a33bee2 3226
66e67e41
JB		 3227 /* prep auth_data so we don't go into idle on disassoc */
3228 ifmgd->auth_data = auth_data;
af6b6374 3229
66e67e41 3230 if (ifmgd->associated)
37ad3888 3231 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
af6b6374 3232
bdcbd8e0 3233 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
e5b900d2 3234
a1cf775d
JB		 3235 err = ieee80211_prep_connection(sdata, req->bss, false);
3236 if (err)
66e67e41 3237 goto err_clear;
af6b6374 3238
66e67e41
JB		 3239 err = ieee80211_probe_auth(sdata);
3240 if (err) {
66e67e41
JB		 3241 sta_info_destroy_addr(sdata, req->bss->bssid);
3242 goto err_clear;
3243 }
3244
3245 /* hold our own reference */
3246 cfg80211_ref_bss(auth_data->bss);
3247 err = 0;
3248 goto out_unlock;
3249
3250 err_clear:
3d2abdfd
EP		 3251 memset(ifmgd->bssid, 0, ETH_ALEN);
3252 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 3253 ifmgd->auth_data = NULL;
3254 err_free:
3255 kfree(auth_data);
3256 out_unlock:
3257 mutex_unlock(&ifmgd->mtx);
b2abb6e2 3258
66e67e41 3259 return err;
af6b6374
JB		 3260}
3261
77fdaa12
JB		 3262int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
3263 struct cfg80211_assoc_request *req)
f0706e82 3264{
66e67e41 3265 struct ieee80211_local *local = sdata->local;
77fdaa12 3266 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 3267 struct ieee80211_bss *bss = (void *)req->bss->priv;
66e67e41 3268 struct ieee80211_mgd_assoc_data *assoc_data;
4e74bfdb 3269 struct ieee80211_supported_band *sband;
9dde6423 3270 const u8 *ssidie, *ht_ie;
2a33bee2 3271 int i, err;
f0706e82 3272
66e67e41
JB		 3273 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
3274 if (!ssidie)
3275 return -EINVAL;
3276
3277 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
3278 if (!assoc_data)
3279 return -ENOMEM;
3280
77fdaa12 3281 mutex_lock(&ifmgd->mtx);
9c87ba67 3282
66e67e41 3283 if (ifmgd->associated)
37ad3888 3284 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
66e67e41
JB		 3285
3286 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
3287 err = -EBUSY;
3288 goto err_free;
af6b6374 3289 }
77fdaa12 3290
66e67e41
JB		 3291 if (ifmgd->assoc_data) {
3292 err = -EBUSY;
3293 goto err_free;
3294 }
77fdaa12 3295
66e67e41
JB		 3296 if (ifmgd->auth_data) {
3297 bool match;
3298
3299 /* keep sta info, bssid if matching */
b203ca39 3300 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
66e67e41 3301 ieee80211_destroy_auth_data(sdata, match);
2a33bee2
GE		 3302 }
3303
66e67e41
JB		 3304 /* prepare assoc data */
3305
77fdaa12 3306 ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
375177bf 3307 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
77fdaa12 3308
d8ec4433
JO		 3309 ifmgd->beacon_crc_valid = false;
3310
de5036aa
JB		 3311 /*
3312 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
3313 * We still associate in non-HT mode (11a/b/g) if any one of these
3314 * ciphers is configured as pairwise.
3315 * We can set this to true for non-11n hardware, that'll be checked
3316 * separately along with the peer capabilities.
3317 */
1c4cb928 3318 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
77fdaa12
JB		 3319 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
3320 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
1c4cb928 3321 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
77fdaa12 3322 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
1c4cb928
JB		 3323 netdev_info(sdata->dev,
3324 "disabling HT due to WEP/TKIP use\n");
3325 }
3326 }
77fdaa12 3327
ef96a842
BG		 3328 if (req->flags & ASSOC_REQ_DISABLE_HT)
3329 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
3330
4e74bfdb
JB		 3331 /* Also disable HT if we don't support it or the AP doesn't use WMM */
3332 sband = local->hw.wiphy->bands[req->bss->channel->band];
3333 if (!sband->ht_cap.ht_supported ||
1c4cb928 3334 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
4e74bfdb 3335 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
1c4cb928
JB		 3336 netdev_info(sdata->dev,
3337 "disabling HT as WMM/QoS is not supported\n");
3338 }
4e74bfdb 3339
ef96a842
BG		 3340 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
3341 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
3342 sizeof(ifmgd->ht_capa_mask));
3343
77fdaa12 3344 if (req->ie && req->ie_len) {
66e67e41
JB		 3345 memcpy(assoc_data->ie, req->ie, req->ie_len);
3346 assoc_data->ie_len = req->ie_len;
3347 }
f679f65d 3348
66e67e41 3349 assoc_data->bss = req->bss;
f679f65d 3350
af6b6374
JB		 3351 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
3352 if (ifmgd->powersave)
3353 ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC;
3354 else
3355 ifmgd->ap_smps = IEEE80211_SMPS_OFF;
3356 } else
3357 ifmgd->ap_smps = ifmgd->req_smps;
3358
66e67e41 3359 assoc_data->capability = req->bss->capability;
32c5057b
JB		 3360 assoc_data->wmm = bss->wmm_used &&
3361 (local->hw.queues >= IEEE80211_NUM_ACS);
66e67e41
JB		 3362 assoc_data->supp_rates = bss->supp_rates;
3363 assoc_data->supp_rates_len = bss->supp_rates_len;
9dde6423
JB		 3364
3365 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
3366 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
3367 assoc_data->ap_ht_param =
3368 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
3369 else
3370 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
63f170e0 3371
ab13315a
KV		 3372 if (bss->wmm_used && bss->uapsd_supported &&
3373 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
76f0303d 3374 assoc_data->uapsd = true;
ab13315a
KV		 3375 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
3376 } else {
76f0303d 3377 assoc_data->uapsd = false;
ab13315a
KV		 3378 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
3379 }
3380
66e67e41
JB		 3381 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
3382 assoc_data->ssid_len = ssidie[1];
63f170e0 3383
77fdaa12 3384 if (req->prev_bssid)
66e67e41 3385 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12
JB		 3386
3387 if (req->use_mfp) {
3388 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
3389 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
3390 } else {
3391 ifmgd->mfp = IEEE80211_MFP_DISABLED;
3392 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
3393 }
3394
3395 if (req->crypto.control_port)
3396 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
3397 else
3398 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
3399
a621fa4d
JB		 3400 sdata->control_port_protocol = req->crypto.control_port_ethertype;
3401 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
3402
66e67e41
JB		 3403 /* kick off associate process */
3404
3405 ifmgd->assoc_data = assoc_data;
3406
a1cf775d
JB		 3407 err = ieee80211_prep_connection(sdata, req->bss, true);
3408 if (err)
3409 goto err_clear;
66e67e41
JB		 3410
3411 if (!bss->dtim_period &&
3412 sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD) {
3413 /*
3414 * Wait up to one beacon interval ...
3415 * should this be more if we miss one?
3416 */
bdcbd8e0
JB		 3417 sdata_info(sdata, "waiting for beacon from %pM\n",
3418 ifmgd->bssid);
3f9768a5 3419 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
66e67e41
JB		 3420 } else {
3421 assoc_data->have_beacon = true;
3422 assoc_data->sent_assoc = false;
3423 assoc_data->timeout = jiffies;
3424 }
3425 run_again(ifmgd, assoc_data->timeout);
3426
fcff4f10
PS		 3427 if (bss->corrupt_data) {
3428 char *corrupt_type = "data";
3429 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
3430 if (bss->corrupt_data &
3431 IEEE80211_BSS_CORRUPT_PROBE_RESP)
3432 corrupt_type = "beacon and probe response";
3433 else
3434 corrupt_type = "beacon";
3435 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
3436 corrupt_type = "probe response";
bdcbd8e0
JB		 3437 sdata_info(sdata, "associating with AP with corrupt %s\n",
3438 corrupt_type);
fcff4f10
PS		 3439 }
3440
66e67e41
JB		 3441 err = 0;
3442 goto out;
3443 err_clear:
3d2abdfd
EP		 3444 memset(ifmgd->bssid, 0, ETH_ALEN);
3445 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 3446 ifmgd->assoc_data = NULL;
3447 err_free:
3448 kfree(assoc_data);
3449 out:
3450 mutex_unlock(&ifmgd->mtx);
3451
3452 return err;
f0706e82
JB		 3453}
3454
77fdaa12 3455int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
63c9c5e7 3456 struct cfg80211_deauth_request *req)
f0706e82 3457{
46900298 3458 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5fef7dbc 3459 u8 frame_buf[DEAUTH_DISASSOC_LEN];
f0706e82 3460
77fdaa12
JB		 3461 mutex_lock(&ifmgd->mtx);
3462
37ad3888 3463 if (ifmgd->auth_data) {
66e67e41 3464 ieee80211_destroy_auth_data(sdata, false);
a58ce43f 3465 mutex_unlock(&ifmgd->mtx);
66e67e41 3466 return 0;
af6b6374 3467 }
77fdaa12 3468
bdcbd8e0
JB		 3469 sdata_info(sdata,
3470 "deauthenticating from %pM by local choice (reason=%d)\n",
3471 req->bssid, req->reason_code);
0ff71613 3472
37ad3888 3473 if (ifmgd->associated &&
b203ca39 3474 ether_addr_equal(ifmgd->associated->bssid, req->bssid))
37ad3888 3475 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5fef7dbc 3476 req->reason_code, true, frame_buf);
37ad3888
JB		 3477 else
3478 ieee80211_send_deauth_disassoc(sdata, req->bssid,
3479 IEEE80211_STYPE_DEAUTH,
3480 req->reason_code, true,
3481 frame_buf);
3482 mutex_unlock(&ifmgd->mtx);
3483
5fef7dbc 3484 __cfg80211_send_deauth(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
f0706e82 3485
7da7cc1d 3486 mutex_lock(&sdata->local->mtx);
bc83b681 3487 ieee80211_recalc_idle(sdata->local);
7da7cc1d 3488 mutex_unlock(&sdata->local->mtx);
bc83b681 3489
f0706e82
JB		 3490 return 0;
3491}
84363e6e 3492
77fdaa12 3493int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 3494 struct cfg80211_disassoc_request *req)
9c6bd790 3495{
77fdaa12 3496 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 3497 u8 bssid[ETH_ALEN];
5fef7dbc 3498 u8 frame_buf[DEAUTH_DISASSOC_LEN];
9c6bd790 3499
77fdaa12 3500 mutex_lock(&ifmgd->mtx);
10f644a4 3501
8d8b261a
JB		 3502 /*
3503 * cfg80211 should catch this ... but it's racy since
3504 * we can receive a disassoc frame, process it, hand it
3505 * to cfg80211 while that's in a locked section already
3506 * trying to tell us that the user wants to disconnect.
3507 */
0c1ad2ca 3508 if (ifmgd->associated != req->bss) {
77fdaa12
JB		 3509 mutex_unlock(&ifmgd->mtx);
3510 return -ENOLINK;
3511 }
3512
bdcbd8e0
JB		 3513 sdata_info(sdata,
3514 "disassociating from %pM by local choice (reason=%d)\n",
3515 req->bss->bssid, req->reason_code);
0ff71613 3516
e69e95db 3517 memcpy(bssid, req->bss->bssid, ETH_ALEN);
37ad3888
JB		 3518 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
3519 req->reason_code, !req->local_state_change,
3520 frame_buf);
77fdaa12 3521 mutex_unlock(&ifmgd->mtx);
10f644a4 3522
5fef7dbc 3523 __cfg80211_send_disassoc(sdata->dev, frame_buf, DEAUTH_DISASSOC_LEN);
bc83b681 3524
7da7cc1d 3525 mutex_lock(&sdata->local->mtx);
bc83b681 3526 ieee80211_recalc_idle(sdata->local);
7da7cc1d 3527 mutex_unlock(&sdata->local->mtx);
bc83b681 3528
10f644a4
JB		 3529 return 0;
3530}
026331c4 3531
afa762f6 3532void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
54e4ffb2
JB		 3533{
3534 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3535
3536 mutex_lock(&ifmgd->mtx);
3537 if (ifmgd->assoc_data)
3538 ieee80211_destroy_assoc_data(sdata, false);
3539 if (ifmgd->auth_data)
3540 ieee80211_destroy_auth_data(sdata, false);
3541 del_timer_sync(&ifmgd->timer);
3542 mutex_unlock(&ifmgd->mtx);
3543}
3544
a97c13c3
JO		 3545void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
3546 enum nl80211_cqm_rssi_threshold_event rssi_event,
3547 gfp_t gfp)
3548{
3549 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3550
b5878a2d
JB		 3551 trace_api_cqm_rssi_notify(sdata, rssi_event);
3552
a97c13c3
JO		 3553 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
3554}
3555EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
Linux kernel - Deliverables
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