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mac80211: use del_timer_sync for final sta cleanup timer deletion
[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
77fdaa12
JB		 91/*
92 * All cfg80211 functions have to be called outside a locked
93 * section so that they can acquire a lock themselves... This
94 * is much simpler than queuing up things in cfg80211, but we
95 * do need some indirection for that here.
96 */
97enum rx_mgmt_action {
98 /* no action required */
99 RX_MGMT_NONE,
100
77fdaa12
JB		 101 /* caller must call cfg80211_send_deauth() */
102 RX_MGMT_CFG80211_DEAUTH,
103
104 /* caller must call cfg80211_send_disassoc() */
105 RX_MGMT_CFG80211_DISASSOC,
66e67e41
JB		 106
107 /* caller must call cfg80211_send_rx_auth() */
108 RX_MGMT_CFG80211_RX_AUTH,
109
110 /* caller must call cfg80211_send_rx_assoc() */
111 RX_MGMT_CFG80211_RX_ASSOC,
112
113 /* caller must call cfg80211_send_assoc_timeout() */
114 RX_MGMT_CFG80211_ASSOC_TIMEOUT,
77fdaa12
JB		 115};
116
5484e237 117/* utils */
77fdaa12
JB		 118static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd)
119{
46a5ebaf 120 lockdep_assert_held(&ifmgd->mtx);
77fdaa12
JB		 121}
122
ca386f31
JB		 123/*
124 * We can have multiple work items (and connection probing)
125 * scheduling this timer, but we need to take care to only
126 * reschedule it when it should fire _earlier_ than it was
127 * asked for before, or if it's not pending right now. This
128 * function ensures that. Note that it then is required to
129 * run this function for all timeouts after the first one
130 * has happened -- the work that runs from this timer will
131 * do that.
132 */
66e67e41 133static void run_again(struct ieee80211_if_managed *ifmgd, unsigned long timeout)
ca386f31
JB		 134{
135 ASSERT_MGD_MTX(ifmgd);
136
137 if (!timer_pending(&ifmgd->timer) ||
138 time_before(timeout, ifmgd->timer.expires))
139 mod_timer(&ifmgd->timer, timeout);
140}
141
d3a910a8 142void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
b291ba11 143{
c1288b12 144 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
b291ba11
JB		 145 return;
146
7eeff74c
JB		 147 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
148 return;
149
b291ba11 150 mod_timer(&sdata->u.mgd.bcn_mon_timer,
7ccc8bd7 151 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
b291ba11
JB		 152}
153
be099e82
LR		 154void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
155{
0c699c3a
LR		 156 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
157
8628172f
SG		 158 if (unlikely(!sdata->u.mgd.associated))
159 return;
160
be099e82
LR		 161 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
162 return;
163
164 mod_timer(&sdata->u.mgd.conn_mon_timer,
165 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
0c699c3a
LR		 166
167 ifmgd->probe_send_count = 0;
be099e82
LR		 168}
169
5484e237 170static int ecw2cw(int ecw)
60f8b39c 171{
5484e237 172 return (1 << ecw) - 1;
60f8b39c
JB		 173}
174
24398e39
JB		 175static u32 ieee80211_config_ht_tx(struct ieee80211_sub_if_data *sdata,
176 struct ieee80211_ht_operation *ht_oper,
177 const u8 *bssid, bool reconfig)
d5522e03
JB		 178{
179 struct ieee80211_local *local = sdata->local;
180 struct ieee80211_supported_band *sband;
55de908a
JB		 181 struct ieee80211_chanctx_conf *chanctx_conf;
182 struct ieee80211_channel *chan;
d5522e03
JB		 183 struct sta_info *sta;
184 u32 changed = 0;
9ed6bcce 185 u16 ht_opmode;
64f68e5d 186 bool disable_40 = false;
d5522e03 187
55de908a
JB		 188 rcu_read_lock();
189 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
190 if (WARN_ON(!chanctx_conf)) {
191 rcu_read_unlock();
192 return 0;
193 }
4bf88530 194 chan = chanctx_conf->def.chan;
55de908a
JB		 195 rcu_read_unlock();
196 sband = local->hw.wiphy->bands[chan->band];
d5522e03 197
4bf88530
JB		 198 switch (sdata->vif.bss_conf.chandef.width) {
199 case NL80211_CHAN_WIDTH_40:
200 if (sdata->vif.bss_conf.chandef.chan->center_freq >
201 sdata->vif.bss_conf.chandef.center_freq1 &&
202 chan->flags & IEEE80211_CHAN_NO_HT40PLUS)
64f68e5d 203 disable_40 = true;
4bf88530
JB		 204 if (sdata->vif.bss_conf.chandef.chan->center_freq <
205 sdata->vif.bss_conf.chandef.center_freq1 &&
206 chan->flags & IEEE80211_CHAN_NO_HT40MINUS)
64f68e5d
JB		 207 disable_40 = true;
208 break;
209 default:
210 break;
211 }
d5522e03 212
24398e39
JB		 213 /* This can change during the lifetime of the BSS */
214 if (!(ht_oper->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY))
64f68e5d
JB		 215 disable_40 = true;
216
217 mutex_lock(&local->sta_mtx);
218 sta = sta_info_get(sdata, bssid);
d5522e03 219
64f68e5d
JB		 220 WARN_ON_ONCE(!sta);
221
222 if (sta && !sta->supports_40mhz)
223 disable_40 = true;
224
225 if (sta && (!reconfig ||
91a0099c 226 (disable_40 != !(sta->sta.ht_cap.cap &
64f68e5d 227 IEEE80211_HT_CAP_SUP_WIDTH_20_40)))) {
d5522e03 228
64f68e5d
JB		 229 if (disable_40)
230 sta->sta.ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
231 else
232 sta->sta.ht_cap.cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
7cc44ed4 233
64f68e5d 234 rate_control_rate_update(local, sband, sta,
8f727ef3 235 IEEE80211_RC_BW_CHANGED);
0aaffa9b 236 }
64f68e5d 237 mutex_unlock(&local->sta_mtx);
d5522e03 238
074d46d1 239 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
d5522e03
JB		 240
241 /* if bss configuration changed store the new one */
24398e39 242 if (!reconfig || (sdata->vif.bss_conf.ht_operation_mode != ht_opmode)) {
d5522e03 243 changed |= BSS_CHANGED_HT;
9ed6bcce 244 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
d5522e03
JB		 245 }
246
247 return changed;
248}
249
9c6bd790
JB		 250/* frame sending functions */
251
66e67e41
JB		 252static int ieee80211_compatible_rates(const u8 *supp_rates, int supp_rates_len,
253 struct ieee80211_supported_band *sband,
254 u32 *rates)
255{
256 int i, j, count;
257 *rates = 0;
258 count = 0;
259 for (i = 0; i < supp_rates_len; i++) {
260 int rate = (supp_rates[i] & 0x7F) * 5;
261
262 for (j = 0; j < sband->n_bitrates; j++)
263 if (sband->bitrates[j].bitrate == rate) {
264 *rates |= BIT(j);
265 count++;
266 break;
267 }
268 }
269
270 return count;
271}
272
273static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
9dde6423 274 struct sk_buff *skb, u8 ap_ht_param,
66e67e41
JB		 275 struct ieee80211_supported_band *sband,
276 struct ieee80211_channel *channel,
277 enum ieee80211_smps_mode smps)
278{
66e67e41
JB		 279 u8 *pos;
280 u32 flags = channel->flags;
281 u16 cap;
282 struct ieee80211_sta_ht_cap ht_cap;
283
284 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
285
66e67e41
JB		 286 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
287 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
288
66e67e41
JB		 289 /* determine capability flags */
290 cap = ht_cap.cap;
291
9dde6423 292 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
66e67e41
JB		 293 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
294 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
295 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
296 cap &= ~IEEE80211_HT_CAP_SGI_40;
297 }
298 break;
299 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
300 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
301 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
302 cap &= ~IEEE80211_HT_CAP_SGI_40;
303 }
304 break;
305 }
306
24398e39
JB		 307 /*
308 * If 40 MHz was disabled associate as though we weren't
309 * capable of 40 MHz -- some broken APs will never fall
310 * back to trying to transmit in 20 MHz.
311 */
312 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
313 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
314 cap &= ~IEEE80211_HT_CAP_SGI_40;
315 }
316
66e67e41
JB		 317 /* set SM PS mode properly */
318 cap &= ~IEEE80211_HT_CAP_SM_PS;
319 switch (smps) {
320 case IEEE80211_SMPS_AUTOMATIC:
321 case IEEE80211_SMPS_NUM_MODES:
322 WARN_ON(1);
323 case IEEE80211_SMPS_OFF:
324 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
325 IEEE80211_HT_CAP_SM_PS_SHIFT;
326 break;
327 case IEEE80211_SMPS_STATIC:
328 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
329 IEEE80211_HT_CAP_SM_PS_SHIFT;
330 break;
331 case IEEE80211_SMPS_DYNAMIC:
332 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
333 IEEE80211_HT_CAP_SM_PS_SHIFT;
334 break;
335 }
336
337 /* reserve and fill IE */
338 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
339 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
340}
341
d545daba
MP		 342static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
343 struct sk_buff *skb,
344 struct ieee80211_supported_band *sband)
345{
346 u8 *pos;
347 u32 cap;
348 struct ieee80211_sta_vht_cap vht_cap;
349
350 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
351
352 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
353
354 /* determine capability flags */
355 cap = vht_cap.cap;
356
f2d9d270
JB		 357 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
358 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ;
359 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
360 }
361
362 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
363 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
364 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
365 }
366
d545daba 367 /* reserve and fill IE */
d4950281 368 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
d545daba
MP		 369 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
370}
371
66e67e41
JB		 372static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
373{
374 struct ieee80211_local *local = sdata->local;
375 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
376 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
377 struct sk_buff *skb;
378 struct ieee80211_mgmt *mgmt;
379 u8 *pos, qos_info;
380 size_t offset = 0, noffset;
381 int i, count, rates_len, supp_rates_len;
382 u16 capab;
383 struct ieee80211_supported_band *sband;
55de908a
JB		 384 struct ieee80211_chanctx_conf *chanctx_conf;
385 struct ieee80211_channel *chan;
66e67e41 386 u32 rates = 0;
66e67e41
JB		 387
388 lockdep_assert_held(&ifmgd->mtx);
389
55de908a
JB		 390 rcu_read_lock();
391 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
392 if (WARN_ON(!chanctx_conf)) {
393 rcu_read_unlock();
394 return;
395 }
4bf88530 396 chan = chanctx_conf->def.chan;
55de908a
JB		 397 rcu_read_unlock();
398 sband = local->hw.wiphy->bands[chan->band];
66e67e41
JB		 399
400 if (assoc_data->supp_rates_len) {
401 /*
402 * Get all rates supported by the device and the AP as
403 * some APs don't like getting a superset of their rates
404 * in the association request (e.g. D-Link DAP 1353 in
405 * b-only mode)...
406 */
407 rates_len = ieee80211_compatible_rates(assoc_data->supp_rates,
408 assoc_data->supp_rates_len,
409 sband, &rates);
410 } else {
411 /*
412 * In case AP not provide any supported rates information
413 * before association, we send information element(s) with
414 * all rates that we support.
415 */
416 rates = ~0;
417 rates_len = sband->n_bitrates;
418 }
419
420 skb = alloc_skb(local->hw.extra_tx_headroom +
421 sizeof(*mgmt) + /* bit too much but doesn't matter */
422 2 + assoc_data->ssid_len + /* SSID */
423 4 + rates_len + /* (extended) rates */
424 4 + /* power capability */
425 2 + 2 * sband->n_channels + /* supported channels */
426 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
d4950281 427 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
66e67e41
JB		 428 assoc_data->ie_len + /* extra IEs */
429 9, /* WMM */
430 GFP_KERNEL);
431 if (!skb)
432 return;
433
434 skb_reserve(skb, local->hw.extra_tx_headroom);
435
436 capab = WLAN_CAPABILITY_ESS;
437
438 if (sband->band == IEEE80211_BAND_2GHZ) {
439 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
440 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
441 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
442 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
443 }
444
445 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
446 capab |= WLAN_CAPABILITY_PRIVACY;
447
448 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
449 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
450 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
451
452 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
453 memset(mgmt, 0, 24);
454 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
455 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
456 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
457
458 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
459 skb_put(skb, 10);
460 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
461 IEEE80211_STYPE_REASSOC_REQ);
462 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
463 mgmt->u.reassoc_req.listen_interval =
464 cpu_to_le16(local->hw.conf.listen_interval);
465 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
466 ETH_ALEN);
467 } else {
468 skb_put(skb, 4);
469 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
470 IEEE80211_STYPE_ASSOC_REQ);
471 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
472 mgmt->u.assoc_req.listen_interval =
473 cpu_to_le16(local->hw.conf.listen_interval);
474 }
475
476 /* SSID */
477 pos = skb_put(skb, 2 + assoc_data->ssid_len);
478 *pos++ = WLAN_EID_SSID;
479 *pos++ = assoc_data->ssid_len;
480 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
481
482 /* add all rates which were marked to be used above */
483 supp_rates_len = rates_len;
484 if (supp_rates_len > 8)
485 supp_rates_len = 8;
486
487 pos = skb_put(skb, supp_rates_len + 2);
488 *pos++ = WLAN_EID_SUPP_RATES;
489 *pos++ = supp_rates_len;
490
491 count = 0;
492 for (i = 0; i < sband->n_bitrates; i++) {
493 if (BIT(i) & rates) {
494 int rate = sband->bitrates[i].bitrate;
495 *pos++ = (u8) (rate / 5);
496 if (++count == 8)
497 break;
498 }
499 }
500
501 if (rates_len > count) {
502 pos = skb_put(skb, rates_len - count + 2);
503 *pos++ = WLAN_EID_EXT_SUPP_RATES;
504 *pos++ = rates_len - count;
505
506 for (i++; i < sband->n_bitrates; i++) {
507 if (BIT(i) & rates) {
508 int rate = sband->bitrates[i].bitrate;
509 *pos++ = (u8) (rate / 5);
510 }
511 }
512 }
513
514 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
515 /* 1. power capabilities */
516 pos = skb_put(skb, 4);
517 *pos++ = WLAN_EID_PWR_CAPABILITY;
518 *pos++ = 2;
519 *pos++ = 0; /* min tx power */
55de908a 520 *pos++ = chan->max_power; /* max tx power */
66e67e41
JB		 521
522 /* 2. supported channels */
523 /* TODO: get this in reg domain format */
524 pos = skb_put(skb, 2 * sband->n_channels + 2);
525 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
526 *pos++ = 2 * sband->n_channels;
527 for (i = 0; i < sband->n_channels; i++) {
528 *pos++ = ieee80211_frequency_to_channel(
529 sband->channels[i].center_freq);
530 *pos++ = 1; /* one channel in the subband*/
531 }
532 }
533
534 /* if present, add any custom IEs that go before HT */
535 if (assoc_data->ie_len && assoc_data->ie) {
536 static const u8 before_ht[] = {
537 WLAN_EID_SSID,
538 WLAN_EID_SUPP_RATES,
539 WLAN_EID_EXT_SUPP_RATES,
540 WLAN_EID_PWR_CAPABILITY,
541 WLAN_EID_SUPPORTED_CHANNELS,
542 WLAN_EID_RSN,
543 WLAN_EID_QOS_CAPA,
544 WLAN_EID_RRM_ENABLED_CAPABILITIES,
545 WLAN_EID_MOBILITY_DOMAIN,
546 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
547 };
548 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
549 before_ht, ARRAY_SIZE(before_ht),
550 offset);
551 pos = skb_put(skb, noffset - offset);
552 memcpy(pos, assoc_data->ie + offset, noffset - offset);
553 offset = noffset;
554 }
555
f2d9d270
JB		 556 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
557 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
558 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
559
a8243b72 560 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
9dde6423 561 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
04ecd257 562 sband, chan, sdata->smps_mode);
66e67e41 563
d545daba
MP		 564 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
565 ieee80211_add_vht_ie(sdata, skb, sband);
566
66e67e41
JB		 567 /* if present, add any custom non-vendor IEs that go after HT */
568 if (assoc_data->ie_len && assoc_data->ie) {
569 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
570 assoc_data->ie_len,
571 offset);
572 pos = skb_put(skb, noffset - offset);
573 memcpy(pos, assoc_data->ie + offset, noffset - offset);
574 offset = noffset;
575 }
576
76f0303d
JB		 577 if (assoc_data->wmm) {
578 if (assoc_data->uapsd) {
dc41e4d4
EP		 579 qos_info = ifmgd->uapsd_queues;
580 qos_info |= (ifmgd->uapsd_max_sp_len <<
66e67e41
JB		 581 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
582 } else {
583 qos_info = 0;
584 }
585
586 pos = skb_put(skb, 9);
587 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
588 *pos++ = 7; /* len */
589 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
590 *pos++ = 0x50;
591 *pos++ = 0xf2;
592 *pos++ = 2; /* WME */
593 *pos++ = 0; /* WME info */
594 *pos++ = 1; /* WME ver */
595 *pos++ = qos_info;
596 }
597
598 /* add any remaining custom (i.e. vendor specific here) IEs */
599 if (assoc_data->ie_len && assoc_data->ie) {
600 noffset = assoc_data->ie_len;
601 pos = skb_put(skb, noffset - offset);
602 memcpy(pos, assoc_data->ie + offset, noffset - offset);
603 }
604
a1845fc7
JB		 605 drv_mgd_prepare_tx(local, sdata);
606
66e67e41
JB		 607 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
608 ieee80211_tx_skb(sdata, skb);
609}
610
572e0012
KV		 611void ieee80211_send_pspoll(struct ieee80211_local *local,
612 struct ieee80211_sub_if_data *sdata)
613{
572e0012
KV		 614 struct ieee80211_pspoll *pspoll;
615 struct sk_buff *skb;
572e0012 616
d8cd189e
KV		 617 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
618 if (!skb)
572e0012 619 return;
572e0012 620
d8cd189e
KV		 621 pspoll = (struct ieee80211_pspoll *) skb->data;
622 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
572e0012 623
62ae67be
JB		 624 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
625 ieee80211_tx_skb(sdata, skb);
572e0012
KV		 626}
627
965bedad
JB		 628void ieee80211_send_nullfunc(struct ieee80211_local *local,
629 struct ieee80211_sub_if_data *sdata,
630 int powersave)
631{
632 struct sk_buff *skb;
d8cd189e 633 struct ieee80211_hdr_3addr *nullfunc;
b6f35301 634 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
965bedad 635
d8cd189e
KV		 636 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
637 if (!skb)
965bedad 638 return;
965bedad 639
d8cd189e 640 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
965bedad 641 if (powersave)
d8cd189e 642 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
965bedad 643
62ae67be 644 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
b6f35301
RM		 645 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
646 IEEE80211_STA_CONNECTION_POLL))
647 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
648
62ae67be 649 ieee80211_tx_skb(sdata, skb);
965bedad
JB		 650}
651
d524215f
FF		 652static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
653 struct ieee80211_sub_if_data *sdata)
654{
655 struct sk_buff *skb;
656 struct ieee80211_hdr *nullfunc;
657 __le16 fc;
658
659 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
660 return;
661
662 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
d15b8459 663 if (!skb)
d524215f 664 return;
d15b8459 665
d524215f
FF		 666 skb_reserve(skb, local->hw.extra_tx_headroom);
667
668 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
669 memset(nullfunc, 0, 30);
670 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
671 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
672 nullfunc->frame_control = fc;
673 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
674 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
675 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
676 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
677
678 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
679 ieee80211_tx_skb(sdata, skb);
680}
681
cc32abd4
JB		 682/* spectrum management related things */
683static void ieee80211_chswitch_work(struct work_struct *work)
684{
685 struct ieee80211_sub_if_data *sdata =
686 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
cc32abd4
JB		 687 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
688
9607e6b6 689 if (!ieee80211_sdata_running(sdata))
cc32abd4
JB		 690 return;
691
77fdaa12
JB		 692 mutex_lock(&ifmgd->mtx);
693 if (!ifmgd->associated)
694 goto out;
cc32abd4 695
55de908a 696 sdata->local->_oper_channel = sdata->local->csa_channel;
5ce6e438
JB		 697 if (!sdata->local->ops->channel_switch) {
698 /* call "hw_config" only if doing sw channel switch */
699 ieee80211_hw_config(sdata->local,
700 IEEE80211_CONF_CHANGE_CHANNEL);
1ea57b1f
SL		 701 } else {
702 /* update the device channel directly */
55de908a 703 sdata->local->hw.conf.channel = sdata->local->_oper_channel;
5ce6e438 704 }
77fdaa12 705
cc32abd4 706 /* XXX: shouldn't really modify cfg80211-owned data! */
55de908a 707 ifmgd->associated->channel = sdata->local->_oper_channel;
cc32abd4 708
57eebdf3 709 /* XXX: wait for a beacon first? */
cc32abd4
JB		 710 ieee80211_wake_queues_by_reason(&sdata->local->hw,
711 IEEE80211_QUEUE_STOP_REASON_CSA);
77fdaa12
JB		 712 out:
713 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
714 mutex_unlock(&ifmgd->mtx);
cc32abd4
JB		 715}
716
5ce6e438
JB		 717void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
718{
55de908a
JB		 719 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
720 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5ce6e438
JB		 721
722 trace_api_chswitch_done(sdata, success);
723 if (!success) {
882a7c69
JB		 724 sdata_info(sdata,
725 "driver channel switch failed, disconnecting\n");
726 ieee80211_queue_work(&sdata->local->hw,
727 &ifmgd->csa_connection_drop_work);
728 } else {
729 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
5ce6e438 730 }
5ce6e438
JB		 731}
732EXPORT_SYMBOL(ieee80211_chswitch_done);
733
cc32abd4
JB		 734static void ieee80211_chswitch_timer(unsigned long data)
735{
736 struct ieee80211_sub_if_data *sdata =
737 (struct ieee80211_sub_if_data *) data;
738 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
739
5bb644a0
JB		 740 if (sdata->local->quiescing) {
741 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
742 return;
743 }
744
42935eca 745 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4
JB		 746}
747
748void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
749 struct ieee80211_channel_sw_ie *sw_elem,
5ce6e438
JB		 750 struct ieee80211_bss *bss,
751 u64 timestamp)
cc32abd4 752{
0c1ad2ca
JB		 753 struct cfg80211_bss *cbss =
754 container_of((void *)bss, struct cfg80211_bss, priv);
cc32abd4
JB		 755 struct ieee80211_channel *new_ch;
756 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
59eb21a6
BR		 757 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num,
758 cbss->channel->band);
55de908a 759 struct ieee80211_chanctx *chanctx;
cc32abd4 760
77fdaa12
JB		 761 ASSERT_MGD_MTX(ifmgd);
762
763 if (!ifmgd->associated)
cc32abd4
JB		 764 return;
765
fbe9c429 766 if (sdata->local->scanning)
cc32abd4
JB		 767 return;
768
769 /* Disregard subsequent beacons if we are already running a timer
770 processing a CSA */
771
772 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
773 return;
774
775 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
882a7c69
JB		 776 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED) {
777 sdata_info(sdata,
778 "AP %pM switches to unsupported channel (%d MHz), disconnecting\n",
779 ifmgd->associated->bssid, new_freq);
780 ieee80211_queue_work(&sdata->local->hw,
781 &ifmgd->csa_connection_drop_work);
cc32abd4 782 return;
882a7c69 783 }
cc32abd4 784
57eebdf3
JB		 785 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
786
55de908a
JB		 787 if (sdata->local->use_chanctx) {
788 sdata_info(sdata,
789 "not handling channel switch with channel contexts\n");
790 ieee80211_queue_work(&sdata->local->hw,
791 &ifmgd->csa_connection_drop_work);
246dc3fd 792 return;
55de908a
JB		 793 }
794
795 mutex_lock(&sdata->local->chanctx_mtx);
796 if (WARN_ON(!rcu_access_pointer(sdata->vif.chanctx_conf))) {
797 mutex_unlock(&sdata->local->chanctx_mtx);
798 return;
799 }
800 chanctx = container_of(rcu_access_pointer(sdata->vif.chanctx_conf),
801 struct ieee80211_chanctx, conf);
802 if (chanctx->refcount > 1) {
803 sdata_info(sdata,
804 "channel switch with multiple interfaces on the same channel, disconnecting\n");
805 ieee80211_queue_work(&sdata->local->hw,
806 &ifmgd->csa_connection_drop_work);
807 mutex_unlock(&sdata->local->chanctx_mtx);
808 return;
809 }
810 mutex_unlock(&sdata->local->chanctx_mtx);
811
812 sdata->local->csa_channel = new_ch;
813
57eebdf3
JB		 814 if (sw_elem->mode)
815 ieee80211_stop_queues_by_reason(&sdata->local->hw,
816 IEEE80211_QUEUE_STOP_REASON_CSA);
817
5ce6e438
JB		 818 if (sdata->local->ops->channel_switch) {
819 /* use driver's channel switch callback */
57eebdf3
JB		 820 struct ieee80211_channel_switch ch_switch = {
821 .timestamp = timestamp,
822 .block_tx = sw_elem->mode,
823 .channel = new_ch,
824 .count = sw_elem->count,
825 };
826
5ce6e438
JB		 827 drv_channel_switch(sdata->local, &ch_switch);
828 return;
829 }
830
831 /* channel switch handled in software */
57eebdf3 832 if (sw_elem->count <= 1)
42935eca 833 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
57eebdf3 834 else
cc32abd4 835 mod_timer(&ifmgd->chswitch_timer,
3049000b
JB		 836 TU_TO_EXP_TIME(sw_elem->count *
837 cbss->beacon_interval));
cc32abd4
JB		 838}
839
1ea6f9c0
JB		 840static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
841 struct ieee80211_channel *channel,
842 const u8 *country_ie, u8 country_ie_len,
843 const u8 *pwr_constr_elem)
cc32abd4 844{
04b7b2ff
JB		 845 struct ieee80211_country_ie_triplet *triplet;
846 int chan = ieee80211_frequency_to_channel(channel->center_freq);
847 int i, chan_pwr, chan_increment, new_ap_level;
848 bool have_chan_pwr = false;
cc32abd4 849
04b7b2ff
JB		 850 /* Invalid IE */
851 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1ea6f9c0 852 return 0;
cc32abd4 853
04b7b2ff
JB		 854 triplet = (void *)(country_ie + 3);
855 country_ie_len -= 3;
856
857 switch (channel->band) {
858 default:
859 WARN_ON_ONCE(1);
860 /* fall through */
861 case IEEE80211_BAND_2GHZ:
862 case IEEE80211_BAND_60GHZ:
863 chan_increment = 1;
864 break;
865 case IEEE80211_BAND_5GHZ:
866 chan_increment = 4;
867 break;
cc32abd4 868 }
04b7b2ff
JB		 869
870 /* find channel */
871 while (country_ie_len >= 3) {
872 u8 first_channel = triplet->chans.first_channel;
873
874 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
875 goto next;
876
877 for (i = 0; i < triplet->chans.num_channels; i++) {
878 if (first_channel + i * chan_increment == chan) {
879 have_chan_pwr = true;
880 chan_pwr = triplet->chans.max_power;
881 break;
882 }
883 }
884 if (have_chan_pwr)
885 break;
886
887 next:
888 triplet++;
889 country_ie_len -= 3;
890 }
891
892 if (!have_chan_pwr)
1ea6f9c0 893 return 0;
04b7b2ff
JB		 894
895 new_ap_level = max_t(int, 0, chan_pwr - *pwr_constr_elem);
896
1ea6f9c0
JB		 897 if (sdata->ap_power_level == new_ap_level)
898 return 0;
04b7b2ff
JB		 899
900 sdata_info(sdata,
901 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
902 new_ap_level, chan_pwr, *pwr_constr_elem,
903 sdata->u.mgd.bssid);
1ea6f9c0
JB		 904 sdata->ap_power_level = new_ap_level;
905 if (__ieee80211_recalc_txpower(sdata))
906 return BSS_CHANGED_TXPOWER;
907 return 0;
cc32abd4
JB		 908}
909
f90754c1
JO		 910void ieee80211_enable_dyn_ps(struct ieee80211_vif *vif)
911{
912 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
913 struct ieee80211_local *local = sdata->local;
914 struct ieee80211_conf *conf = &local->hw.conf;
915
916 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
917 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
918 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
919
920 local->disable_dynamic_ps = false;
921 conf->dynamic_ps_timeout = local->dynamic_ps_user_timeout;
922}
923EXPORT_SYMBOL(ieee80211_enable_dyn_ps);
924
925void ieee80211_disable_dyn_ps(struct ieee80211_vif *vif)
926{
927 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
928 struct ieee80211_local *local = sdata->local;
929 struct ieee80211_conf *conf = &local->hw.conf;
930
931 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
932 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
933 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
934
935 local->disable_dynamic_ps = true;
936 conf->dynamic_ps_timeout = 0;
937 del_timer_sync(&local->dynamic_ps_timer);
938 ieee80211_queue_work(&local->hw,
939 &local->dynamic_ps_enable_work);
940}
941EXPORT_SYMBOL(ieee80211_disable_dyn_ps);
942
965bedad
JB		 943/* powersave */
944static void ieee80211_enable_ps(struct ieee80211_local *local,
945 struct ieee80211_sub_if_data *sdata)
946{
947 struct ieee80211_conf *conf = &local->hw.conf;
948
d5edaedc
JB		 949 /*
950 * If we are scanning right now then the parameters will
951 * take effect when scan finishes.
952 */
fbe9c429 953 if (local->scanning)
d5edaedc
JB		 954 return;
955
965bedad
JB		 956 if (conf->dynamic_ps_timeout > 0 &&
957 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
958 mod_timer(&local->dynamic_ps_timer, jiffies +
959 msecs_to_jiffies(conf->dynamic_ps_timeout));
960 } else {
961 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
962 ieee80211_send_nullfunc(local, sdata, 1);
375177bf 963
2a13052f
JO		 964 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
965 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
966 return;
967
968 conf->flags |= IEEE80211_CONF_PS;
969 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965bedad
JB		 970 }
971}
972
973static void ieee80211_change_ps(struct ieee80211_local *local)
974{
975 struct ieee80211_conf *conf = &local->hw.conf;
976
977 if (local->ps_sdata) {
965bedad
JB		 978 ieee80211_enable_ps(local, local->ps_sdata);
979 } else if (conf->flags & IEEE80211_CONF_PS) {
980 conf->flags &= ~IEEE80211_CONF_PS;
981 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
982 del_timer_sync(&local->dynamic_ps_timer);
983 cancel_work_sync(&local->dynamic_ps_enable_work);
984 }
985}
986
808118cb
JY		 987static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
988{
989 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
990 struct sta_info *sta = NULL;
c2c98fde 991 bool authorized = false;
808118cb
JY		 992
993 if (!mgd->powersave)
994 return false;
995
05cb9108
JB		 996 if (mgd->broken_ap)
997 return false;
998
808118cb
JY		 999 if (!mgd->associated)
1000 return false;
1001
808118cb
JY		 1002 if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
1003 IEEE80211_STA_CONNECTION_POLL))
1004 return false;
1005
1006 rcu_read_lock();
1007 sta = sta_info_get(sdata, mgd->bssid);
1008 if (sta)
c2c98fde 1009 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
808118cb
JY		 1010 rcu_read_unlock();
1011
c2c98fde 1012 return authorized;
808118cb
JY		 1013}
1014
965bedad 1015/* need to hold RTNL or interface lock */
10f644a4 1016void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 1017{
1018 struct ieee80211_sub_if_data *sdata, *found = NULL;
1019 int count = 0;
195e294d 1020 int timeout;
965bedad
JB		 1021
1022 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
1023 local->ps_sdata = NULL;
1024 return;
1025 }
1026
1027 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 1028 if (!ieee80211_sdata_running(sdata))
965bedad 1029 continue;
8c7914de
RM		 1030 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1031 /* If an AP vif is found, then disable PS
1032 * by setting the count to zero thereby setting
1033 * ps_sdata to NULL.
1034 */
1035 count = 0;
1036 break;
1037 }
965bedad
JB		 1038 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1039 continue;
1040 found = sdata;
1041 count++;
1042 }
1043
808118cb 1044 if (count == 1 && ieee80211_powersave_allowed(found)) {
f90754c1 1045 struct ieee80211_conf *conf = &local->hw.conf;
10f644a4
JB		 1046 s32 beaconint_us;
1047
1048 if (latency < 0)
ed77134b 1049 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
10f644a4
JB		 1050
1051 beaconint_us = ieee80211_tu_to_usec(
1052 found->vif.bss_conf.beacon_int);
1053
ff616381 1054 timeout = local->dynamic_ps_forced_timeout;
195e294d
JO		 1055 if (timeout < 0) {
1056 /*
ff616381
JO		 1057 * Go to full PSM if the user configures a very low
1058 * latency requirement.
0ab82b04
EP		 1059 * The 2000 second value is there for compatibility
1060 * until the PM_QOS_NETWORK_LATENCY is configured
1061 * with real values.
195e294d 1062 */
0ab82b04
EP		 1063 if (latency > (1900 * USEC_PER_MSEC) &&
1064 latency != (2000 * USEC_PER_SEC))
195e294d 1065 timeout = 0;
ff616381
JO		 1066 else
1067 timeout = 100;
195e294d 1068 }
f90754c1
JO		 1069 local->dynamic_ps_user_timeout = timeout;
1070 if (!local->disable_dynamic_ps)
1071 conf->dynamic_ps_timeout =
1072 local->dynamic_ps_user_timeout;
195e294d 1073
04fe2037 1074 if (beaconint_us > latency) {
10f644a4 1075 local->ps_sdata = NULL;
04fe2037 1076 } else {
56007a02 1077 struct ieee80211_bss *bss;
04fe2037 1078 int maxslp = 1;
56007a02 1079 u8 dtimper;
04fe2037 1080
56007a02
JB		 1081 bss = (void *)found->u.mgd.associated->priv;
1082 dtimper = bss->dtim_period;
1083
1084 /* If the TIM IE is invalid, pretend the value is 1 */
1085 if (!dtimper)
1086 dtimper = 1;
1087 else if (dtimper > 1)
04fe2037
JB		 1088 maxslp = min_t(int, dtimper,
1089 latency / beaconint_us);
1090
9ccebe61 1091 local->hw.conf.max_sleep_period = maxslp;
56007a02 1092 local->hw.conf.ps_dtim_period = dtimper;
10f644a4 1093 local->ps_sdata = found;
04fe2037 1094 }
10f644a4 1095 } else {
965bedad 1096 local->ps_sdata = NULL;
10f644a4 1097 }
965bedad
JB		 1098
1099 ieee80211_change_ps(local);
1100}
1101
ab095877
EP		 1102void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1103{
1104 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1105
1106 if (sdata->vif.bss_conf.ps != ps_allowed) {
1107 sdata->vif.bss_conf.ps = ps_allowed;
1108 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1109 }
1110}
1111
965bedad
JB		 1112void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1113{
1114 struct ieee80211_local *local =
1115 container_of(work, struct ieee80211_local,
1116 dynamic_ps_disable_work);
1117
1118 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1119 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1120 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1121 }
1122
1123 ieee80211_wake_queues_by_reason(&local->hw,
1124 IEEE80211_QUEUE_STOP_REASON_PS);
1125}
1126
1127void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1128{
1129 struct ieee80211_local *local =
1130 container_of(work, struct ieee80211_local,
1131 dynamic_ps_enable_work);
1132 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
5e34069c 1133 struct ieee80211_if_managed *ifmgd;
1ddc2867
RM		 1134 unsigned long flags;
1135 int q;
965bedad
JB		 1136
1137 /* can only happen when PS was just disabled anyway */
1138 if (!sdata)
1139 return;
1140
5e34069c
CL		 1141 ifmgd = &sdata->u.mgd;
1142
965bedad
JB		 1143 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1144 return;
1145
77b7023a
AN		 1146 if (!local->disable_dynamic_ps &&
1147 local->hw.conf.dynamic_ps_timeout > 0) {
1148 /* don't enter PS if TX frames are pending */
1149 if (drv_tx_frames_pending(local)) {
1ddc2867
RM		 1150 mod_timer(&local->dynamic_ps_timer, jiffies +
1151 msecs_to_jiffies(
1152 local->hw.conf.dynamic_ps_timeout));
1153 return;
1154 }
77b7023a
AN		 1155
1156 /*
1157 * transmission can be stopped by others which leads to
1158 * dynamic_ps_timer expiry. Postpone the ps timer if it
1159 * is not the actual idle state.
1160 */
1161 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1162 for (q = 0; q < local->hw.queues; q++) {
1163 if (local->queue_stop_reasons[q]) {
1164 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1165 flags);
1166 mod_timer(&local->dynamic_ps_timer, jiffies +
1167 msecs_to_jiffies(
1168 local->hw.conf.dynamic_ps_timeout));
1169 return;
1170 }
1171 }
1172 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1ddc2867 1173 }
1ddc2867 1174
375177bf 1175 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
9c38a8b4 1176 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
f3e85b9e 1177 netif_tx_stop_all_queues(sdata->dev);
965bedad 1178
e8306f98
VN		 1179 if (drv_tx_frames_pending(local))
1180 mod_timer(&local->dynamic_ps_timer, jiffies +
1181 msecs_to_jiffies(
1182 local->hw.conf.dynamic_ps_timeout));
1183 else {
1184 ieee80211_send_nullfunc(local, sdata, 1);
1185 /* Flush to get the tx status of nullfunc frame */
1186 drv_flush(local, false);
1187 }
f3e85b9e
VN		 1188 }
1189
2a13052f
JO		 1190 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1191 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
375177bf
VN		 1192 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1193 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1194 local->hw.conf.flags |= IEEE80211_CONF_PS;
1195 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1196 }
f3e85b9e 1197
77b7023a
AN		 1198 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1199 netif_tx_wake_all_queues(sdata->dev);
965bedad
JB		 1200}
1201
1202void ieee80211_dynamic_ps_timer(unsigned long data)
1203{
1204 struct ieee80211_local *local = (void *) data;
1205
78f1a8b7 1206 if (local->quiescing || local->suspended)
5bb644a0
JB		 1207 return;
1208
42935eca 1209 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 1210}
1211
60f8b39c 1212/* MLME */
7d25745d 1213static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
4ced3f74 1214 struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1215 u8 *wmm_param, size_t wmm_param_len)
1216{
f0706e82 1217 struct ieee80211_tx_queue_params params;
4ced3f74 1218 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1219 size_t left;
1220 int count;
ab13315a 1221 u8 *pos, uapsd_queues = 0;
f0706e82 1222
e1b3ec1a 1223 if (!local->ops->conf_tx)
7d25745d 1224 return false;
e1b3ec1a 1225
32c5057b 1226 if (local->hw.queues < IEEE80211_NUM_ACS)
7d25745d 1227 return false;
3434fbd3
JB		 1228
1229 if (!wmm_param)
7d25745d 1230 return false;
3434fbd3 1231
f0706e82 1232 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
7d25745d 1233 return false;
ab13315a
KV		 1234
1235 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
dc41e4d4 1236 uapsd_queues = ifmgd->uapsd_queues;
ab13315a 1237
f0706e82 1238 count = wmm_param[6] & 0x0f;
46900298 1239 if (count == ifmgd->wmm_last_param_set)
7d25745d 1240 return false;
46900298 1241 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 1242
1243 pos = wmm_param + 8;
1244 left = wmm_param_len - 8;
1245
1246 memset(&params, 0, sizeof(params));
1247
00e96dec 1248 sdata->wmm_acm = 0;
f0706e82
JB		 1249 for (; left >= 4; left -= 4, pos += 4) {
1250 int aci = (pos[0] >> 5) & 0x03;
1251 int acm = (pos[0] >> 4) & 0x01;
ab13315a 1252 bool uapsd = false;
f0706e82
JB		 1253 int queue;
1254
1255 switch (aci) {
0eeb59fe 1256 case 1: /* AC_BK */
e100bb64 1257 queue = 3;
988c0f72 1258 if (acm)
00e96dec 1259 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV		 1260 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1261 uapsd = true;
f0706e82 1262 break;
0eeb59fe 1263 case 2: /* AC_VI */
e100bb64 1264 queue = 1;
988c0f72 1265 if (acm)
00e96dec 1266 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV		 1267 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1268 uapsd = true;
f0706e82 1269 break;
0eeb59fe 1270 case 3: /* AC_VO */
e100bb64 1271 queue = 0;
988c0f72 1272 if (acm)
00e96dec 1273 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV		 1274 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1275 uapsd = true;
f0706e82 1276 break;
0eeb59fe 1277 case 0: /* AC_BE */
f0706e82 1278 default:
e100bb64 1279 queue = 2;
988c0f72 1280 if (acm)
00e96dec 1281 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV		 1282 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1283 uapsd = true;
f0706e82
JB		 1284 break;
1285 }
1286
1287 params.aifs = pos[0] & 0x0f;
1288 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1289 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 1290 params.txop = get_unaligned_le16(pos + 2);
ab13315a
KV		 1291 params.uapsd = uapsd;
1292
bdcbd8e0
JB		 1293 mlme_dbg(sdata,
1294 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1295 queue, aci, acm,
1296 params.aifs, params.cw_min, params.cw_max,
1297 params.txop, params.uapsd);
f6f3def3
EP		 1298 sdata->tx_conf[queue] = params;
1299 if (drv_conf_tx(local, sdata, queue, &params))
bdcbd8e0
JB		 1300 sdata_err(sdata,
1301 "failed to set TX queue parameters for queue %d\n",
1302 queue);
f0706e82 1303 }
e1b3ec1a
SG		 1304
1305 /* enable WMM or activate new settings */
4ced3f74 1306 sdata->vif.bss_conf.qos = true;
7d25745d 1307 return true;
f0706e82
JB		 1308}
1309
925e64c3
SG		 1310static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1311{
1312 lockdep_assert_held(&sdata->local->mtx);
1313
1314 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1315 IEEE80211_STA_BEACON_POLL);
1316 ieee80211_run_deferred_scan(sdata->local);
1317}
1318
1319static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1320{
1321 mutex_lock(&sdata->local->mtx);
1322 __ieee80211_stop_poll(sdata);
1323 mutex_unlock(&sdata->local->mtx);
1324}
1325
7a5158ef
JB		 1326static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1327 u16 capab, bool erp_valid, u8 erp)
5628221c 1328{
bda3933a 1329 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 1330 u32 changed = 0;
7a5158ef
JB		 1331 bool use_protection;
1332 bool use_short_preamble;
1333 bool use_short_slot;
1334
1335 if (erp_valid) {
1336 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1337 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1338 } else {
1339 use_protection = false;
1340 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1341 }
1342
1343 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
55de908a 1344 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
43d35343 1345 use_short_slot = true;
5628221c 1346
471b3efd 1347 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 1348 bss_conf->use_cts_prot = use_protection;
1349 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 1350 }
7e9ed188 1351
d43c7b37 1352 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 1353 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 1354 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 1355 }
d9430a32 1356
7a5158ef 1357 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 1358 bss_conf->use_short_slot = use_short_slot;
1359 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 1360 }
1361
1362 return changed;
1363}
1364
f698d856 1365static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 1366 struct cfg80211_bss *cbss,
ae5eb026 1367 u32 bss_info_changed)
f0706e82 1368{
0c1ad2ca 1369 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 1370 struct ieee80211_local *local = sdata->local;
68542962 1371 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
d6f2da5b 1372
ae5eb026 1373 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 1374 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
50ae34a2 1375 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 1376
7ccc8bd7
FF		 1377 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1378 IEEE80211_BEACON_LOSS_COUNT * bss_conf->beacon_int));
1379
0c1ad2ca
JB		 1380 sdata->u.mgd.associated = cbss;
1381 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 1382
17e4ec14
JM		 1383 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1384
488dd7b5 1385 if (sdata->vif.p2p) {
9caf0364 1386 const struct cfg80211_bss_ies *ies;
488dd7b5 1387
9caf0364
JB		 1388 rcu_read_lock();
1389 ies = rcu_dereference(cbss->ies);
1390 if (ies) {
1391 u8 noa[2];
1392 int ret;
1393
1394 ret = cfg80211_get_p2p_attr(
1395 ies->data, ies->len,
1396 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1397 noa, sizeof(noa));
1398 if (ret >= 2) {
1399 bss_conf->p2p_oppps = noa[1] & 0x80;
1400 bss_conf->p2p_ctwindow = noa[1] & 0x7f;
1401 bss_info_changed |= BSS_CHANGED_P2P_PS;
1402 sdata->u.mgd.p2p_noa_index = noa[0];
1403 }
488dd7b5 1404 }
9caf0364 1405 rcu_read_unlock();
488dd7b5
JB		 1406 }
1407
b291ba11 1408 /* just to be sure */
925e64c3 1409 ieee80211_stop_poll(sdata);
b291ba11 1410
9ac19a90 1411 ieee80211_led_assoc(local, 1);
9306102e 1412
e5b900d2
JB		 1413 if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
1414 bss_conf->dtim_period = bss->dtim_period;
1415 else
1416 bss_conf->dtim_period = 0;
1417
68542962 1418 bss_conf->assoc = 1;
9cef8737 1419
a97c13c3 1420 /* Tell the driver to monitor connection quality (if supported) */
ea086359 1421 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
68542962 1422 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 1423 bss_info_changed |= BSS_CHANGED_CQM;
1424
68542962
JO		 1425 /* Enable ARP filtering */
1426 if (bss_conf->arp_filter_enabled != sdata->arp_filter_state) {
1427 bss_conf->arp_filter_enabled = sdata->arp_filter_state;
1428 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1429 }
1430
ae5eb026 1431 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 1432
056508dc
JB		 1433 mutex_lock(&local->iflist_mtx);
1434 ieee80211_recalc_ps(local, -1);
1435 mutex_unlock(&local->iflist_mtx);
e0cb686f 1436
04ecd257 1437 ieee80211_recalc_smps(sdata);
ab095877
EP		 1438 ieee80211_recalc_ps_vif(sdata);
1439
8a5b33f5 1440 netif_tx_start_all_queues(sdata->dev);
9ac19a90 1441 netif_carrier_on(sdata->dev);
f0706e82
JB		 1442}
1443
e69e95db 1444static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
37ad3888
JB		 1445 u16 stype, u16 reason, bool tx,
1446 u8 *frame_buf)
aa458d17 1447{
46900298 1448 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17
TW		 1449 struct ieee80211_local *local = sdata->local;
1450 struct sta_info *sta;
3cc5240b 1451 u32 changed = 0;
aa458d17 1452
77fdaa12
JB		 1453 ASSERT_MGD_MTX(ifmgd);
1454
37ad3888
JB		 1455 if (WARN_ON_ONCE(tx && !frame_buf))
1456 return;
1457
b291ba11
JB		 1458 if (WARN_ON(!ifmgd->associated))
1459 return;
1460
79543d8e
DS		 1461 ieee80211_stop_poll(sdata);
1462
77fdaa12 1463 ifmgd->associated = NULL;
77fdaa12
JB		 1464
1465 /*
1466 * we need to commit the associated = NULL change because the
1467 * scan code uses that to determine whether this iface should
1468 * go to/wake up from powersave or not -- and could otherwise
1469 * wake the queues erroneously.
1470 */
1471 smp_mb();
1472
1473 /*
1474 * Thus, we can only afterwards stop the queues -- to account
1475 * for the case where another CPU is finishing a scan at this
1476 * time -- we don't want the scan code to enable queues.
1477 */
aa458d17 1478
8a5b33f5 1479 netif_tx_stop_all_queues(sdata->dev);
aa458d17
TW		 1480 netif_carrier_off(sdata->dev);
1481
2a419056 1482 mutex_lock(&local->sta_mtx);
88a9e31c 1483 sta = sta_info_get(sdata, ifmgd->bssid);
4cad6c7c 1484 if (sta) {
c2c98fde 1485 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
7f161146 1486 ieee80211_sta_tear_down_BA_sessions(sta, false);
4cad6c7c 1487 }
2a419056 1488 mutex_unlock(&local->sta_mtx);
aa458d17 1489
88bc40e8
EP		 1490 /*
1491 * if we want to get out of ps before disassoc (why?) we have
1492 * to do it before sending disassoc, as otherwise the null-packet
1493 * won't be valid.
1494 */
1495 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1496 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1497 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1498 }
1499 local->ps_sdata = NULL;
1500
ab095877
EP		 1501 /* disable per-vif ps */
1502 ieee80211_recalc_ps_vif(sdata);
1503
f823981e
EP		 1504 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1505 if (tx)
1506 drv_flush(local, false);
1507
37ad3888
JB		 1508 /* deauthenticate/disassociate now */
1509 if (tx || frame_buf)
88a9e31c
EP		 1510 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
1511 reason, tx, frame_buf);
37ad3888
JB		 1512
1513 /* flush out frame */
1514 if (tx)
1515 drv_flush(local, false);
1516
88a9e31c
EP		 1517 /* clear bssid only after building the needed mgmt frames */
1518 memset(ifmgd->bssid, 0, ETH_ALEN);
1519
37ad3888
JB		 1520 /* remove AP and TDLS peers */
1521 sta_info_flush(local, sdata);
1522
1523 /* finally reset all BSS / config parameters */
f5e5bf25
TW		 1524 changed |= ieee80211_reset_erp_info(sdata);
1525
f5e5bf25 1526 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 1527 changed |= BSS_CHANGED_ASSOC;
1528 sdata->vif.bss_conf.assoc = false;
f5e5bf25 1529
488dd7b5
JB		 1530 sdata->vif.bss_conf.p2p_ctwindow = 0;
1531 sdata->vif.bss_conf.p2p_oppps = false;
1532
413ad50a 1533 /* on the next assoc, re-program HT parameters */
ef96a842
BG		 1534 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1535 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
413ad50a 1536
1ea6f9c0 1537 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
a8302de9 1538
520eb820
KV		 1539 del_timer_sync(&local->dynamic_ps_timer);
1540 cancel_work_sync(&local->dynamic_ps_enable_work);
1541
68542962
JO		 1542 /* Disable ARP filtering */
1543 if (sdata->vif.bss_conf.arp_filter_enabled) {
1544 sdata->vif.bss_conf.arp_filter_enabled = false;
1545 changed |= BSS_CHANGED_ARP_FILTER;
1546 }
1547
3abead59
JB		 1548 sdata->vif.bss_conf.qos = false;
1549 changed |= BSS_CHANGED_QOS;
1550
0aaffa9b
JB		 1551 /* The BSSID (not really interesting) and HT changed */
1552 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 1553 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 1554
3abead59
JB		 1555 /* disassociated - set to defaults now */
1556 ieee80211_set_wmm_default(sdata, false);
1557
b9dcf712
JB		 1558 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1559 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1560 del_timer_sync(&sdata->u.mgd.timer);
1561 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2d9957cc
JB		 1562
1563 sdata->u.mgd.timers_running = 0;
028e8da0
JB		 1564
1565 ifmgd->flags = 0;
1566 ieee80211_vif_release_channel(sdata);
aa458d17 1567}
f0706e82 1568
3cf335d5
KV		 1569void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1570 struct ieee80211_hdr *hdr)
1571{
1572 /*
1573 * We can postpone the mgd.timer whenever receiving unicast frames
1574 * from AP because we know that the connection is working both ways
1575 * at that time. But multicast frames (and hence also beacons) must
1576 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 1577 * data idle periods for sending the periodic probe request to the
1578 * AP we're connected to.
3cf335d5 1579 */
b291ba11
JB		 1580 if (is_multicast_ether_addr(hdr->addr1))
1581 return;
1582
be099e82 1583 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 1584}
f0706e82 1585
4e5ff376
FF		 1586static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1587{
1588 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
133d40f9 1589 struct ieee80211_local *local = sdata->local;
4e5ff376 1590
133d40f9 1591 mutex_lock(&local->mtx);
4e5ff376 1592 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
133d40f9
SG		 1593 IEEE80211_STA_CONNECTION_POLL))) {
1594 mutex_unlock(&local->mtx);
1595 return;
1596 }
4e5ff376 1597
925e64c3 1598 __ieee80211_stop_poll(sdata);
133d40f9
SG		 1599
1600 mutex_lock(&local->iflist_mtx);
1601 ieee80211_recalc_ps(local, -1);
1602 mutex_unlock(&local->iflist_mtx);
4e5ff376
FF		 1603
1604 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
133d40f9 1605 goto out;
4e5ff376
FF		 1606
1607 /*
1608 * We've received a probe response, but are not sure whether
1609 * we have or will be receiving any beacons or data, so let's
1610 * schedule the timers again, just in case.
1611 */
1612 ieee80211_sta_reset_beacon_monitor(sdata);
1613
1614 mod_timer(&ifmgd->conn_mon_timer,
1615 round_jiffies_up(jiffies +
1616 IEEE80211_CONNECTION_IDLE_TIME));
133d40f9 1617out:
133d40f9 1618 mutex_unlock(&local->mtx);
4e5ff376
FF		 1619}
1620
1621void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
04ac3c0e 1622 struct ieee80211_hdr *hdr, bool ack)
4e5ff376 1623{
75706d0e 1624 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF		 1625 return;
1626
04ac3c0e
FF		 1627 if (ack)
1628 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF		 1629
1630 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1631 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e
FF		 1632 if (ack)
1633 sdata->u.mgd.probe_send_count = 0;
1634 else
1635 sdata->u.mgd.nullfunc_failed = true;
4e5ff376
FF		 1636 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1637 }
1638}
1639
a43abf29
ML		 1640static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1641{
1642 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1643 const u8 *ssid;
f01a067d 1644 u8 *dst = ifmgd->associated->bssid;
180205bd 1645 u8 unicast_limit = max(1, max_probe_tries - 3);
f01a067d
LR		 1646
1647 /*
1648 * Try sending broadcast probe requests for the last three
1649 * probe requests after the first ones failed since some
1650 * buggy APs only support broadcast probe requests.
1651 */
1652 if (ifmgd->probe_send_count >= unicast_limit)
1653 dst = NULL;
a43abf29 1654
4e5ff376
FF		 1655 /*
1656 * When the hardware reports an accurate Tx ACK status, it's
1657 * better to send a nullfunc frame instead of a probe request,
1658 * as it will kick us off the AP quickly if we aren't associated
1659 * anymore. The timeout will be reset if the frame is ACKed by
1660 * the AP.
1661 */
992e68bf
SD		 1662 ifmgd->probe_send_count++;
1663
04ac3c0e
FF		 1664 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1665 ifmgd->nullfunc_failed = false;
4e5ff376 1666 ieee80211_send_nullfunc(sdata->local, sdata, 0);
04ac3c0e 1667 } else {
88c868c4
SG		 1668 int ssid_len;
1669
9caf0364 1670 rcu_read_lock();
4e5ff376 1671 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
88c868c4
SG		 1672 if (WARN_ON_ONCE(ssid == NULL))
1673 ssid_len = 0;
1674 else
1675 ssid_len = ssid[1];
1676
1677 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
fe94fe05 1678 0, (u32) -1, true, false,
55de908a 1679 ifmgd->associated->channel, false);
9caf0364 1680 rcu_read_unlock();
4e5ff376 1681 }
a43abf29 1682
180205bd 1683 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
a43abf29 1684 run_again(ifmgd, ifmgd->probe_timeout);
f69b9c79
RM		 1685 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
1686 drv_flush(sdata->local, false);
a43abf29
ML		 1687}
1688
b291ba11
JB		 1689static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1690 bool beacon)
04de8381 1691{
04de8381 1692 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 1693 bool already = false;
34bfc411 1694
9607e6b6 1695 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 1696 return;
1697
77fdaa12
JB		 1698 mutex_lock(&ifmgd->mtx);
1699
1700 if (!ifmgd->associated)
1701 goto out;
1702
133d40f9
SG		 1703 mutex_lock(&sdata->local->mtx);
1704
1705 if (sdata->local->tmp_channel || sdata->local->scanning) {
1706 mutex_unlock(&sdata->local->mtx);
1707 goto out;
1708 }
1709
e87cc472 1710 if (beacon)
bdcbd8e0
JB		 1711 mlme_dbg_ratelimited(sdata,
1712 "detected beacon loss from AP - sending probe request\n");
1713
6efb71b0
HS		 1714 ieee80211_cqm_rssi_notify(&sdata->vif,
1715 NL80211_CQM_RSSI_BEACON_LOSS_EVENT, GFP_KERNEL);
04de8381 1716
b291ba11
JB		 1717 /*
1718 * The driver/our work has already reported this event or the
1719 * connection monitoring has kicked in and we have already sent
1720 * a probe request. Or maybe the AP died and the driver keeps
1721 * reporting until we disassociate...
1722 *
1723 * In either case we have to ignore the current call to this
1724 * function (except for setting the correct probe reason bit)
1725 * because otherwise we would reset the timer every time and
1726 * never check whether we received a probe response!
1727 */
1728 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1729 IEEE80211_STA_CONNECTION_POLL))
1730 already = true;
1731
1732 if (beacon)
1733 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1734 else
1735 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1736
133d40f9
SG		 1737 mutex_unlock(&sdata->local->mtx);
1738
b291ba11
JB		 1739 if (already)
1740 goto out;
1741
4e751843
JB		 1742 mutex_lock(&sdata->local->iflist_mtx);
1743 ieee80211_recalc_ps(sdata->local, -1);
1744 mutex_unlock(&sdata->local->iflist_mtx);
1745
a43abf29
ML		 1746 ifmgd->probe_send_count = 0;
1747 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12
JB		 1748 out:
1749 mutex_unlock(&ifmgd->mtx);
04de8381
KV		 1750}
1751
a619a4c0
JO		 1752struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
1753 struct ieee80211_vif *vif)
1754{
1755 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1756 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d9b3b28b 1757 struct cfg80211_bss *cbss;
a619a4c0
JO		 1758 struct sk_buff *skb;
1759 const u8 *ssid;
88c868c4 1760 int ssid_len;
a619a4c0
JO		 1761
1762 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1763 return NULL;
1764
1765 ASSERT_MGD_MTX(ifmgd);
1766
d9b3b28b
EP		 1767 if (ifmgd->associated)
1768 cbss = ifmgd->associated;
1769 else if (ifmgd->auth_data)
1770 cbss = ifmgd->auth_data->bss;
1771 else if (ifmgd->assoc_data)
1772 cbss = ifmgd->assoc_data->bss;
1773 else
a619a4c0
JO		 1774 return NULL;
1775
9caf0364 1776 rcu_read_lock();
d9b3b28b 1777 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
88c868c4
SG		 1778 if (WARN_ON_ONCE(ssid == NULL))
1779 ssid_len = 0;
1780 else
1781 ssid_len = ssid[1];
1782
d9b3b28b 1783 skb = ieee80211_build_probe_req(sdata, cbss->bssid,
55de908a 1784 (u32) -1, cbss->channel,
6b77863b 1785 ssid + 2, ssid_len,
85a237fe 1786 NULL, 0, true);
9caf0364 1787 rcu_read_unlock();
a619a4c0
JO		 1788
1789 return skb;
1790}
1791EXPORT_SYMBOL(ieee80211_ap_probereq_get);
1792
882a7c69
JB		 1793static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata,
1794 bool transmit_frame)
1e4dcd01
JO		 1795{
1796 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1797 struct ieee80211_local *local = sdata->local;
6ae16775 1798 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
1e4dcd01
JO		 1799
1800 mutex_lock(&ifmgd->mtx);
1801 if (!ifmgd->associated) {
1802 mutex_unlock(&ifmgd->mtx);
1803 return;
1804 }
1805
37ad3888
JB		 1806 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
1807 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
882a7c69
JB		 1808 transmit_frame, frame_buf);
1809 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
1e4dcd01 1810 mutex_unlock(&ifmgd->mtx);
7da7cc1d 1811
1e4dcd01
JO		 1812 /*
1813 * must be outside lock due to cfg80211,
1814 * but that's not a problem.
1815 */
6ae16775 1816 cfg80211_send_deauth(sdata->dev, frame_buf, IEEE80211_DEAUTH_FRAME_LEN);
fcac4fb0
FF		 1817
1818 mutex_lock(&local->mtx);
1819 ieee80211_recalc_idle(local);
1820 mutex_unlock(&local->mtx);
1e4dcd01
JO		 1821}
1822
cc74c0c7 1823static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 1824{
1825 struct ieee80211_sub_if_data *sdata =
1826 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 1827 u.mgd.beacon_connection_loss_work);
a85e1d55
PS		 1828 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1829 struct sta_info *sta;
1830
1831 if (ifmgd->associated) {
30fa9047 1832 rcu_read_lock();
a85e1d55
PS		 1833 sta = sta_info_get(sdata, ifmgd->bssid);
1834 if (sta)
1835 sta->beacon_loss_count++;
30fa9047 1836 rcu_read_unlock();
a85e1d55 1837 }
b291ba11 1838
882a7c69
JB		 1839 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR) {
1840 sdata_info(sdata, "Connection to AP %pM lost\n",
1841 ifmgd->bssid);
1842 __ieee80211_disconnect(sdata, false);
1843 } else {
1e4dcd01 1844 ieee80211_mgd_probe_ap(sdata, true);
882a7c69
JB		 1845 }
1846}
1847
1848static void ieee80211_csa_connection_drop_work(struct work_struct *work)
1849{
1850 struct ieee80211_sub_if_data *sdata =
1851 container_of(work, struct ieee80211_sub_if_data,
1852 u.mgd.csa_connection_drop_work);
1853
1854 ieee80211_wake_queues_by_reason(&sdata->local->hw,
1855 IEEE80211_QUEUE_STOP_REASON_CSA);
1856 __ieee80211_disconnect(sdata, true);
b291ba11
JB		 1857}
1858
04de8381
KV		 1859void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1860{
1861 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 1862 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 1863
b5878a2d
JB		 1864 trace_api_beacon_loss(sdata);
1865
1e4dcd01
JO		 1866 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
1867 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 1868}
1869EXPORT_SYMBOL(ieee80211_beacon_loss);
1870
1e4dcd01
JO		 1871void ieee80211_connection_loss(struct ieee80211_vif *vif)
1872{
1873 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1874 struct ieee80211_hw *hw = &sdata->local->hw;
1875
b5878a2d
JB		 1876 trace_api_connection_loss(sdata);
1877
1e4dcd01
JO		 1878 WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR));
1879 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1880}
1881EXPORT_SYMBOL(ieee80211_connection_loss);
1882
1883
66e67e41
JB		 1884static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
1885 bool assoc)
1886{
1887 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1888
1889 lockdep_assert_held(&sdata->u.mgd.mtx);
1890
66e67e41
JB		 1891 if (!assoc) {
1892 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
1893
1894 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
1895 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
028e8da0 1896 sdata->u.mgd.flags = 0;
55de908a 1897 ieee80211_vif_release_channel(sdata);
66e67e41
JB		 1898 }
1899
1900 cfg80211_put_bss(auth_data->bss);
1901 kfree(auth_data);
1902 sdata->u.mgd.auth_data = NULL;
1903}
1904
1905static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1906 struct ieee80211_mgmt *mgmt, size_t len)
1907{
1908 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1909 u8 *pos;
1910 struct ieee802_11_elems elems;
1911
1912 pos = mgmt->u.auth.variable;
1913 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1914 if (!elems.challenge)
1915 return;
1916 auth_data->expected_transaction = 4;
a1845fc7 1917 drv_mgd_prepare_tx(sdata->local, sdata);
700e8ea6 1918 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
66e67e41
JB		 1919 elems.challenge - 2, elems.challenge_len + 2,
1920 auth_data->bss->bssid, auth_data->bss->bssid,
1921 auth_data->key, auth_data->key_len,
1922 auth_data->key_idx);
1923}
1924
1925static enum rx_mgmt_action __must_check
1926ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1927 struct ieee80211_mgmt *mgmt, size_t len)
1928{
1929 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1930 u8 bssid[ETH_ALEN];
1931 u16 auth_alg, auth_transaction, status_code;
1932 struct sta_info *sta;
1933
1934 lockdep_assert_held(&ifmgd->mtx);
1935
1936 if (len < 24 + 6)
1937 return RX_MGMT_NONE;
1938
1939 if (!ifmgd->auth_data || ifmgd->auth_data->done)
1940 return RX_MGMT_NONE;
1941
1942 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
1943
b203ca39 1944 if (!ether_addr_equal(bssid, mgmt->bssid))
66e67e41
JB		 1945 return RX_MGMT_NONE;
1946
1947 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1948 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1949 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1950
1951 if (auth_alg != ifmgd->auth_data->algorithm ||
0f4126e8
JM		 1952 auth_transaction != ifmgd->auth_data->expected_transaction) {
1953 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
1954 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
1955 auth_transaction,
1956 ifmgd->auth_data->expected_transaction);
66e67e41 1957 return RX_MGMT_NONE;
0f4126e8 1958 }
66e67e41
JB		 1959
1960 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 1961 sdata_info(sdata, "%pM denied authentication (status %d)\n",
1962 mgmt->sa, status_code);
dac211ec
EP		 1963 ieee80211_destroy_auth_data(sdata, false);
1964 return RX_MGMT_CFG80211_RX_AUTH;
66e67e41
JB		 1965 }
1966
1967 switch (ifmgd->auth_data->algorithm) {
1968 case WLAN_AUTH_OPEN:
1969 case WLAN_AUTH_LEAP:
1970 case WLAN_AUTH_FT:
6b8ece3a 1971 case WLAN_AUTH_SAE:
66e67e41
JB		 1972 break;
1973 case WLAN_AUTH_SHARED_KEY:
1974 if (ifmgd->auth_data->expected_transaction != 4) {
1975 ieee80211_auth_challenge(sdata, mgmt, len);
1976 /* need another frame */
1977 return RX_MGMT_NONE;
1978 }
1979 break;
1980 default:
1981 WARN_ONCE(1, "invalid auth alg %d",
1982 ifmgd->auth_data->algorithm);
1983 return RX_MGMT_NONE;
1984 }
1985
bdcbd8e0 1986 sdata_info(sdata, "authenticated\n");
66e67e41
JB		 1987 ifmgd->auth_data->done = true;
1988 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
1989 run_again(ifmgd, ifmgd->auth_data->timeout);
1990
6b8ece3a
JM		 1991 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
1992 ifmgd->auth_data->expected_transaction != 2) {
1993 /*
1994 * Report auth frame to user space for processing since another
1995 * round of Authentication frames is still needed.
1996 */
1997 return RX_MGMT_CFG80211_RX_AUTH;
1998 }
1999
66e67e41
JB		 2000 /* move station state to auth */
2001 mutex_lock(&sdata->local->sta_mtx);
2002 sta = sta_info_get(sdata, bssid);
2003 if (!sta) {
2004 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2005 goto out_err;
2006 }
2007 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
bdcbd8e0 2008 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
66e67e41
JB		 2009 goto out_err;
2010 }
2011 mutex_unlock(&sdata->local->sta_mtx);
2012
2013 return RX_MGMT_CFG80211_RX_AUTH;
2014 out_err:
2015 mutex_unlock(&sdata->local->sta_mtx);
2016 /* ignore frame -- wait for timeout */
2017 return RX_MGMT_NONE;
2018}
2019
2020
77fdaa12
JB		 2021static enum rx_mgmt_action __must_check
2022ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
77fdaa12 2023 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2024{
46900298 2025 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 2026 const u8 *bssid = NULL;
f0706e82
JB		 2027 u16 reason_code;
2028
66e67e41
JB		 2029 lockdep_assert_held(&ifmgd->mtx);
2030
f4ea83dd 2031 if (len < 24 + 2)
77fdaa12 2032 return RX_MGMT_NONE;
f0706e82 2033
66e67e41 2034 if (!ifmgd->associated ||
b203ca39 2035 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
66e67e41 2036 return RX_MGMT_NONE;
77fdaa12 2037
0c1ad2ca 2038 bssid = ifmgd->associated->bssid;
f0706e82
JB		 2039
2040 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2041
bdcbd8e0
JB		 2042 sdata_info(sdata, "deauthenticated from %pM (Reason: %u)\n",
2043 bssid, reason_code);
77fdaa12 2044
37ad3888
JB		 2045 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2046
7da7cc1d 2047 mutex_lock(&sdata->local->mtx);
63f170e0 2048 ieee80211_recalc_idle(sdata->local);
7da7cc1d 2049 mutex_unlock(&sdata->local->mtx);
f0706e82 2050
77fdaa12 2051 return RX_MGMT_CFG80211_DEAUTH;
f0706e82
JB		 2052}
2053
2054
77fdaa12
JB		 2055static enum rx_mgmt_action __must_check
2056ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2057 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2058{
46900298 2059 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 2060 u16 reason_code;
2061
66e67e41 2062 lockdep_assert_held(&ifmgd->mtx);
77fdaa12 2063
66e67e41 2064 if (len < 24 + 2)
77fdaa12
JB		 2065 return RX_MGMT_NONE;
2066
66e67e41 2067 if (!ifmgd->associated ||
b203ca39 2068 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
77fdaa12 2069 return RX_MGMT_NONE;
f0706e82
JB		 2070
2071 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2072
bdcbd8e0
JB		 2073 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2074 mgmt->sa, reason_code);
f0706e82 2075
37ad3888
JB		 2076 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2077
7da7cc1d 2078 mutex_lock(&sdata->local->mtx);
bc83b681 2079 ieee80211_recalc_idle(sdata->local);
7da7cc1d 2080 mutex_unlock(&sdata->local->mtx);
37ad3888 2081
77fdaa12 2082 return RX_MGMT_CFG80211_DISASSOC;
f0706e82
JB		 2083}
2084
c74d084f
CL		 2085static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2086 u8 *supp_rates, unsigned int supp_rates_len,
2087 u32 *rates, u32 *basic_rates,
2088 bool *have_higher_than_11mbit,
2089 int *min_rate, int *min_rate_index)
2090{
2091 int i, j;
2092
2093 for (i = 0; i < supp_rates_len; i++) {
2094 int rate = (supp_rates[i] & 0x7f) * 5;
2095 bool is_basic = !!(supp_rates[i] & 0x80);
2096
2097 if (rate > 110)
2098 *have_higher_than_11mbit = true;
2099
2100 /*
2101 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2102 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2103 *
2104 * Note: Even through the membership selector and the basic
2105 * rate flag share the same bit, they are not exactly
2106 * the same.
2107 */
2108 if (!!(supp_rates[i] & 0x80) &&
2109 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2110 continue;
2111
2112 for (j = 0; j < sband->n_bitrates; j++) {
2113 if (sband->bitrates[j].bitrate == rate) {
2114 *rates |= BIT(j);
2115 if (is_basic)
2116 *basic_rates |= BIT(j);
2117 if (rate < *min_rate) {
2118 *min_rate = rate;
2119 *min_rate_index = j;
2120 }
2121 break;
2122 }
2123 }
2124 }
2125}
f0706e82 2126
66e67e41
JB		 2127static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2128 bool assoc)
2129{
2130 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2131
2132 lockdep_assert_held(&sdata->u.mgd.mtx);
2133
66e67e41
JB		 2134 if (!assoc) {
2135 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2136
2137 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2138 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
028e8da0 2139 sdata->u.mgd.flags = 0;
55de908a 2140 ieee80211_vif_release_channel(sdata);
66e67e41
JB		 2141 }
2142
2143 kfree(assoc_data);
2144 sdata->u.mgd.assoc_data = NULL;
2145}
2146
2147static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2148 struct cfg80211_bss *cbss,
af6b6374 2149 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2150{
46900298 2151 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 2152 struct ieee80211_local *local = sdata->local;
8318d78a 2153 struct ieee80211_supported_band *sband;
f0706e82 2154 struct sta_info *sta;
af6b6374 2155 u8 *pos;
af6b6374 2156 u16 capab_info, aid;
f0706e82 2157 struct ieee802_11_elems elems;
bda3933a 2158 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
ae5eb026 2159 u32 changed = 0;
c74d084f 2160 int err;
f0706e82 2161
af6b6374 2162 /* AssocResp and ReassocResp have identical structure */
f0706e82 2163
f0706e82 2164 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 2165 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 2166
1dd84aa2 2167 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
bdcbd8e0
JB		 2168 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2169 aid);
1dd84aa2
JB		 2170 aid &= ~(BIT(15) | BIT(14));
2171
05cb9108
JB		 2172 ifmgd->broken_ap = false;
2173
2174 if (aid == 0 || aid > IEEE80211_MAX_AID) {
bdcbd8e0
JB		 2175 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2176 aid);
05cb9108
JB		 2177 aid = 0;
2178 ifmgd->broken_ap = true;
2179 }
2180
af6b6374
JB		 2181 pos = mgmt->u.assoc_resp.variable;
2182 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2183
f0706e82 2184 if (!elems.supp_rates) {
bdcbd8e0 2185 sdata_info(sdata, "no SuppRates element in AssocResp\n");
af6b6374 2186 return false;
f0706e82
JB		 2187 }
2188
46900298 2189 ifmgd->aid = aid;
f0706e82 2190
2a33bee2
GE		 2191 mutex_lock(&sdata->local->sta_mtx);
2192 /*
2193 * station info was already allocated and inserted before
2194 * the association and should be available to us
2195 */
7852e361 2196 sta = sta_info_get(sdata, cbss->bssid);
2a33bee2
GE		 2197 if (WARN_ON(!sta)) {
2198 mutex_unlock(&sdata->local->sta_mtx);
af6b6374 2199 return false;
77fdaa12 2200 }
05e5e883 2201
55de908a 2202 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
f709fc69 2203
a8243b72 2204 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
ef96a842 2205 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
d9fe60de 2206 elems.ht_cap_elem, &sta->sta.ht_cap);
ae5eb026 2207
64f68e5d
JB		 2208 sta->supports_40mhz =
2209 sta->sta.ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40;
2210
818255ea
MP		 2211 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2212 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
2213 elems.vht_cap_elem,
2214 &sta->sta.vht_cap);
2215
4b7679a5 2216 rate_control_rate_init(sta);
f0706e82 2217
46900298 2218 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
c2c98fde 2219 set_sta_flag(sta, WLAN_STA_MFP);
5394af4d 2220
ddf4ac53 2221 if (elems.wmm_param)
c2c98fde 2222 set_sta_flag(sta, WLAN_STA_WME);
ddf4ac53 2223
c8987876
JB		 2224 err = sta_info_move_state(sta, IEEE80211_STA_AUTH);
2225 if (!err)
2226 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
2227 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2228 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2229 if (err) {
bdcbd8e0
JB		 2230 sdata_info(sdata,
2231 "failed to move station %pM to desired state\n",
2232 sta->sta.addr);
c8987876
JB		 2233 WARN_ON(__sta_info_destroy(sta));
2234 mutex_unlock(&sdata->local->sta_mtx);
2235 return false;
2236 }
2237
7852e361 2238 mutex_unlock(&sdata->local->sta_mtx);
ddf4ac53 2239
f2176d72
JO		 2240 /*
2241 * Always handle WMM once after association regardless
2242 * of the first value the AP uses. Setting -1 here has
2243 * that effect because the AP values is an unsigned
2244 * 4-bit value.
2245 */
2246 ifmgd->wmm_last_param_set = -1;
2247
ddf4ac53 2248 if (elems.wmm_param)
4ced3f74 2249 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 2250 elems.wmm_param_len);
aa837e1d 2251 else
3abead59
JB		 2252 ieee80211_set_wmm_default(sdata, false);
2253 changed |= BSS_CHANGED_QOS;
f0706e82 2254
074d46d1 2255 if (elems.ht_operation && elems.wmm_param &&
a8243b72 2256 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
24398e39
JB		 2257 changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation,
2258 cbss->bssid, false);
ae5eb026 2259
60f8b39c
JB		 2260 /* set AID and assoc capability,
2261 * ieee80211_set_associated() will tell the driver */
2262 bss_conf->aid = aid;
2263 bss_conf->assoc_capability = capab_info;
0c1ad2ca 2264 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 2265
d524215f
FF		 2266 /*
2267 * If we're using 4-addr mode, let the AP know that we're
2268 * doing so, so that it can create the STA VLAN on its side
2269 */
2270 if (ifmgd->use_4addr)
2271 ieee80211_send_4addr_nullfunc(local, sdata);
2272
15b7b062 2273 /*
b291ba11
JB		 2274 * Start timer to probe the connection to the AP now.
2275 * Also start the timer that will detect beacon loss.
15b7b062 2276 */
b291ba11 2277 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 2278 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 2279
af6b6374 2280 return true;
f0706e82
JB		 2281}
2282
66e67e41
JB		 2283static enum rx_mgmt_action __must_check
2284ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2285 struct ieee80211_mgmt *mgmt, size_t len,
2286 struct cfg80211_bss **bss)
2287{
2288 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2289 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2290 u16 capab_info, status_code, aid;
2291 struct ieee802_11_elems elems;
2292 u8 *pos;
2293 bool reassoc;
2294
2295 lockdep_assert_held(&ifmgd->mtx);
2296
2297 if (!assoc_data)
2298 return RX_MGMT_NONE;
b203ca39 2299 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
66e67e41
JB		 2300 return RX_MGMT_NONE;
2301
2302 /*
2303 * AssocResp and ReassocResp have identical structure, so process both
2304 * of them in this function.
2305 */
2306
2307 if (len < 24 + 6)
2308 return RX_MGMT_NONE;
2309
2310 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2311 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2312 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2313 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2314
bdcbd8e0
JB		 2315 sdata_info(sdata,
2316 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2317 reassoc ? "Rea" : "A", mgmt->sa,
2318 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
66e67e41
JB		 2319
2320 pos = mgmt->u.assoc_resp.variable;
2321 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2322
2323 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
2324 elems.timeout_int && elems.timeout_int_len == 5 &&
2325 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
2326 u32 tu, ms;
2327 tu = get_unaligned_le32(elems.timeout_int + 1);
2328 ms = tu * 1024 / 1000;
bdcbd8e0
JB		 2329 sdata_info(sdata,
2330 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2331 mgmt->sa, tu, ms);
66e67e41
JB		 2332 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
2333 if (ms > IEEE80211_ASSOC_TIMEOUT)
2334 run_again(ifmgd, assoc_data->timeout);
2335 return RX_MGMT_NONE;
2336 }
2337
2338 *bss = assoc_data->bss;
2339
2340 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2341 sdata_info(sdata, "%pM denied association (code=%d)\n",
2342 mgmt->sa, status_code);
66e67e41
JB		 2343 ieee80211_destroy_assoc_data(sdata, false);
2344 } else {
66e67e41
JB		 2345 if (!ieee80211_assoc_success(sdata, *bss, mgmt, len)) {
2346 /* oops -- internal error -- send timeout for now */
10a9109f 2347 ieee80211_destroy_assoc_data(sdata, false);
66e67e41
JB		 2348 cfg80211_put_bss(*bss);
2349 return RX_MGMT_CFG80211_ASSOC_TIMEOUT;
2350 }
635d999f 2351 sdata_info(sdata, "associated\n");
79ebfb85
JB		 2352
2353 /*
2354 * destroy assoc_data afterwards, as otherwise an idle
2355 * recalc after assoc_data is NULL but before associated
2356 * is set can cause the interface to go idle
2357 */
2358 ieee80211_destroy_assoc_data(sdata, true);
66e67e41
JB		 2359 }
2360
2361 return RX_MGMT_CFG80211_RX_ASSOC;
2362}
8e3c1b77 2363
98c8fccf 2364static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
8e3c1b77 2365 struct ieee80211_mgmt *mgmt, size_t len,
98c8fccf
JB		 2366 struct ieee80211_rx_status *rx_status,
2367 struct ieee802_11_elems *elems,
2368 bool beacon)
2369{
2370 struct ieee80211_local *local = sdata->local;
2371 int freq;
c2b13452 2372 struct ieee80211_bss *bss;
98c8fccf 2373 struct ieee80211_channel *channel;
56007a02
JB		 2374 bool need_ps = false;
2375
66e67e41 2376 if (sdata->u.mgd.associated &&
b203ca39 2377 ether_addr_equal(mgmt->bssid, sdata->u.mgd.associated->bssid)) {
56007a02
JB		 2378 bss = (void *)sdata->u.mgd.associated->priv;
2379 /* not previously set so we may need to recalc */
2380 need_ps = !bss->dtim_period;
2381 }
98c8fccf
JB		 2382
2383 if (elems->ds_params && elems->ds_params_len == 1)
59eb21a6
BR		 2384 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
2385 rx_status->band);
98c8fccf
JB		 2386 else
2387 freq = rx_status->freq;
2388
2389 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2390
2391 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2392 return;
2393
98c8fccf 2394 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2a519311 2395 channel, beacon);
77fdaa12
JB		 2396 if (bss)
2397 ieee80211_rx_bss_put(local, bss);
2398
2399 if (!sdata->u.mgd.associated)
98c8fccf
JB		 2400 return;
2401
56007a02
JB		 2402 if (need_ps) {
2403 mutex_lock(&local->iflist_mtx);
2404 ieee80211_recalc_ps(local, -1);
2405 mutex_unlock(&local->iflist_mtx);
2406 }
2407
5bc1420b
JB		 2408 if (elems->ch_switch_ie &&
2409 memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid, ETH_ALEN) == 0)
2410 ieee80211_sta_process_chanswitch(sdata, elems->ch_switch_ie,
5ce6e438 2411 bss, rx_status->mactime);
f0706e82
JB		 2412}
2413
2414
f698d856 2415static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 2416 struct sk_buff *skb)
f0706e82 2417{
af6b6374 2418 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 2419 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 2420 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2421 size_t baselen, len = skb->len;
ae6a44e3
EK		 2422 struct ieee802_11_elems elems;
2423
15b7b062
KV		 2424 ifmgd = &sdata->u.mgd;
2425
77fdaa12
JB		 2426 ASSERT_MGD_MTX(ifmgd);
2427
b203ca39 2428 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
8e7cdbb6
TW		 2429 return; /* ignore ProbeResp to foreign address */
2430
ae6a44e3
EK		 2431 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2432 if (baselen > len)
2433 return;
2434
2435 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2436 &elems);
2437
98c8fccf 2438 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
9859b81e 2439
77fdaa12 2440 if (ifmgd->associated &&
b203ca39 2441 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
4e5ff376 2442 ieee80211_reset_ap_probe(sdata);
66e67e41
JB		 2443
2444 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
b203ca39 2445 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
66e67e41 2446 /* got probe response, continue with auth */
bdcbd8e0 2447 sdata_info(sdata, "direct probe responded\n");
66e67e41
JB		 2448 ifmgd->auth_data->tries = 0;
2449 ifmgd->auth_data->timeout = jiffies;
2450 run_again(ifmgd, ifmgd->auth_data->timeout);
2451 }
f0706e82
JB		 2452}
2453
d91f36db
JB		 2454/*
2455 * This is the canonical list of information elements we care about,
2456 * the filter code also gives us all changes to the Microsoft OUI
2457 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2458 *
2459 * We implement beacon filtering in software since that means we can
2460 * avoid processing the frame here and in cfg80211, and userspace
2461 * will not be able to tell whether the hardware supports it or not.
2462 *
2463 * XXX: This list needs to be dynamic -- userspace needs to be able to
2464 * add items it requires. It also needs to be able to tell us to
2465 * look out for other vendor IEs.
2466 */
2467static const u64 care_about_ies =
1d4df3a5
JB		 2468 (1ULL << WLAN_EID_COUNTRY) |
2469 (1ULL << WLAN_EID_ERP_INFO) |
2470 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2471 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2472 (1ULL << WLAN_EID_HT_CAPABILITY) |
074d46d1 2473 (1ULL << WLAN_EID_HT_OPERATION);
d91f36db 2474
f698d856 2475static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2476 struct ieee80211_mgmt *mgmt,
2477 size_t len,
2478 struct ieee80211_rx_status *rx_status)
2479{
d91f36db 2480 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 2481 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 2482 size_t baselen;
2483 struct ieee802_11_elems elems;
f698d856 2484 struct ieee80211_local *local = sdata->local;
55de908a
JB		 2485 struct ieee80211_chanctx_conf *chanctx_conf;
2486 struct ieee80211_channel *chan;
471b3efd 2487 u32 changed = 0;
f87ad637 2488 bool erp_valid;
7a5158ef 2489 u8 erp_value = 0;
d91f36db 2490 u32 ncrc;
77fdaa12
JB		 2491 u8 *bssid;
2492
66e67e41 2493 lockdep_assert_held(&ifmgd->mtx);
f0706e82 2494
ae6a44e3
EK		 2495 /* Process beacon from the current BSS */
2496 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2497 if (baselen > len)
2498 return;
2499
55de908a
JB		 2500 rcu_read_lock();
2501 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2502 if (!chanctx_conf) {
2503 rcu_read_unlock();
f0706e82 2504 return;
55de908a
JB		 2505 }
2506
4bf88530 2507 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
55de908a
JB		 2508 rcu_read_unlock();
2509 return;
2510 }
4bf88530 2511 chan = chanctx_conf->def.chan;
55de908a 2512 rcu_read_unlock();
f0706e82 2513
66e67e41 2514 if (ifmgd->assoc_data && !ifmgd->assoc_data->have_beacon &&
b203ca39 2515 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
66e67e41
JB		 2516 ieee802_11_parse_elems(mgmt->u.beacon.variable,
2517 len - baselen, &elems);
77fdaa12 2518
66e67e41
JB		 2519 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
2520 false);
2521 ifmgd->assoc_data->have_beacon = true;
2522 ifmgd->assoc_data->sent_assoc = false;
2523 /* continue assoc process */
2524 ifmgd->assoc_data->timeout = jiffies;
2525 run_again(ifmgd, ifmgd->assoc_data->timeout);
2526 return;
2527 }
77fdaa12 2528
66e67e41 2529 if (!ifmgd->associated ||
b203ca39 2530 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
f0706e82 2531 return;
66e67e41 2532 bssid = ifmgd->associated->bssid;
f0706e82 2533
17e4ec14
JM		 2534 /* Track average RSSI from the Beacon frames of the current AP */
2535 ifmgd->last_beacon_signal = rx_status->signal;
2536 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
2537 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3ba06c6f 2538 ifmgd->ave_beacon_signal = rx_status->signal * 16;
17e4ec14 2539 ifmgd->last_cqm_event_signal = 0;
391a200a 2540 ifmgd->count_beacon_signal = 1;
615f7b9b 2541 ifmgd->last_ave_beacon_signal = 0;
17e4ec14
JM		 2542 } else {
2543 ifmgd->ave_beacon_signal =
2544 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
2545 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
2546 ifmgd->ave_beacon_signal) / 16;
391a200a 2547 ifmgd->count_beacon_signal++;
17e4ec14 2548 }
615f7b9b
MV		 2549
2550 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
2551 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
2552 int sig = ifmgd->ave_beacon_signal;
2553 int last_sig = ifmgd->last_ave_beacon_signal;
2554
2555 /*
2556 * if signal crosses either of the boundaries, invoke callback
2557 * with appropriate parameters
2558 */
2559 if (sig > ifmgd->rssi_max_thold &&
2560 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
2561 ifmgd->last_ave_beacon_signal = sig;
2562 drv_rssi_callback(local, RSSI_EVENT_HIGH);
2563 } else if (sig < ifmgd->rssi_min_thold &&
2564 (last_sig >= ifmgd->rssi_max_thold ||
2565 last_sig == 0)) {
2566 ifmgd->last_ave_beacon_signal = sig;
2567 drv_rssi_callback(local, RSSI_EVENT_LOW);
2568 }
2569 }
2570
17e4ec14 2571 if (bss_conf->cqm_rssi_thold &&
391a200a 2572 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
ea086359 2573 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
17e4ec14
JM		 2574 int sig = ifmgd->ave_beacon_signal / 16;
2575 int last_event = ifmgd->last_cqm_event_signal;
2576 int thold = bss_conf->cqm_rssi_thold;
2577 int hyst = bss_conf->cqm_rssi_hyst;
2578 if (sig < thold &&
2579 (last_event == 0 || sig < last_event - hyst)) {
2580 ifmgd->last_cqm_event_signal = sig;
2581 ieee80211_cqm_rssi_notify(
2582 &sdata->vif,
2583 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
2584 GFP_KERNEL);
2585 } else if (sig > thold &&
2586 (last_event == 0 || sig > last_event + hyst)) {
2587 ifmgd->last_cqm_event_signal = sig;
2588 ieee80211_cqm_rssi_notify(
2589 &sdata->vif,
2590 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
2591 GFP_KERNEL);
2592 }
2593 }
2594
b291ba11 2595 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
bdcbd8e0
JB		 2596 mlme_dbg_ratelimited(sdata,
2597 "cancelling probereq poll due to a received beacon\n");
925e64c3 2598 mutex_lock(&local->mtx);
b291ba11 2599 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
925e64c3
SG		 2600 ieee80211_run_deferred_scan(local);
2601 mutex_unlock(&local->mtx);
2602
4e751843
JB		 2603 mutex_lock(&local->iflist_mtx);
2604 ieee80211_recalc_ps(local, -1);
2605 mutex_unlock(&local->iflist_mtx);
92778180
JM		 2606 }
2607
b291ba11
JB		 2608 /*
2609 * Push the beacon loss detection into the future since
2610 * we are processing a beacon from the AP just now.
2611 */
d3a910a8 2612 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 2613
d91f36db
JB		 2614 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
2615 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
2616 len - baselen, &elems,
2617 care_about_ies, ncrc);
2618
25c9c875 2619 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
f87ad637
RR		 2620 bool directed_tim = ieee80211_check_tim(elems.tim,
2621 elems.tim_len,
2622 ifmgd->aid);
1fb3606b 2623 if (directed_tim) {
572e0012 2624 if (local->hw.conf.dynamic_ps_timeout > 0) {
70b12f26
RW		 2625 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2626 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2627 ieee80211_hw_config(local,
2628 IEEE80211_CONF_CHANGE_PS);
2629 }
572e0012 2630 ieee80211_send_nullfunc(local, sdata, 0);
6f0756a3 2631 } else if (!local->pspolling && sdata->u.mgd.powersave) {
572e0012
KV		 2632 local->pspolling = true;
2633
2634 /*
2635 * Here is assumed that the driver will be
2636 * able to send ps-poll frame and receive a
2637 * response even though power save mode is
2638 * enabled, but some drivers might require
2639 * to disable power save here. This needs
2640 * to be investigated.
2641 */
2642 ieee80211_send_pspoll(local, sdata);
2643 }
a97b77b9
VN		 2644 }
2645 }
7a5158ef 2646
488dd7b5
JB		 2647 if (sdata->vif.p2p) {
2648 u8 noa[2];
2649 int ret;
2650
2651 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
2652 len - baselen,
2653 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
2654 noa, sizeof(noa));
2655 if (ret >= 2 && sdata->u.mgd.p2p_noa_index != noa[0]) {
2656 bss_conf->p2p_oppps = noa[1] & 0x80;
2657 bss_conf->p2p_ctwindow = noa[1] & 0x7f;
2658 changed |= BSS_CHANGED_P2P_PS;
2659 sdata->u.mgd.p2p_noa_index = noa[0];
2660 /*
2661 * make sure we update all information, the CRC
2662 * mechanism doesn't look at P2P attributes.
2663 */
2664 ifmgd->beacon_crc_valid = false;
2665 }
2666 }
2667
d8ec4433 2668 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
30196673
JM		 2669 return;
2670 ifmgd->beacon_crc = ncrc;
d8ec4433 2671 ifmgd->beacon_crc_valid = true;
30196673 2672
7d25745d
JB		 2673 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
2674 true);
2675
2676 if (ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2677 elems.wmm_param_len))
2678 changed |= BSS_CHANGED_QOS;
2679
7a5158ef
JB		 2680 if (elems.erp_info && elems.erp_info_len >= 1) {
2681 erp_valid = true;
2682 erp_value = elems.erp_info[0];
2683 } else {
2684 erp_valid = false;
50c4afb9 2685 }
7a5158ef
JB		 2686 changed |= ieee80211_handle_bss_capability(sdata,
2687 le16_to_cpu(mgmt->u.beacon.capab_info),
2688 erp_valid, erp_value);
f0706e82 2689
d3c990fb 2690
074d46d1 2691 if (elems.ht_cap_elem && elems.ht_operation && elems.wmm_param &&
a8243b72 2692 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
24398e39
JB		 2693 changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation,
2694 bssid, true);
d3c990fb 2695
04b7b2ff
JB		 2696 if (elems.country_elem && elems.pwr_constr_elem &&
2697 mgmt->u.probe_resp.capab_info &
2698 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT))
1ea6f9c0
JB		 2699 changed |= ieee80211_handle_pwr_constr(sdata, chan,
2700 elems.country_elem,
2701 elems.country_elem_len,
2702 elems.pwr_constr_elem);
3f2355cb 2703
471b3efd 2704 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 2705}
2706
1fa57d01
JB		 2707void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
2708 struct sk_buff *skb)
f0706e82 2709{
77fdaa12 2710 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 2711 struct ieee80211_rx_status *rx_status;
f0706e82 2712 struct ieee80211_mgmt *mgmt;
66e67e41 2713 struct cfg80211_bss *bss = NULL;
77fdaa12 2714 enum rx_mgmt_action rma = RX_MGMT_NONE;
f0706e82
JB		 2715 u16 fc;
2716
f0706e82
JB		 2717 rx_status = (struct ieee80211_rx_status *) skb->cb;
2718 mgmt = (struct ieee80211_mgmt *) skb->data;
2719 fc = le16_to_cpu(mgmt->frame_control);
2720
77fdaa12
JB		 2721 mutex_lock(&ifmgd->mtx);
2722
66e67e41
JB		 2723 switch (fc & IEEE80211_FCTL_STYPE) {
2724 case IEEE80211_STYPE_BEACON:
2725 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
2726 break;
2727 case IEEE80211_STYPE_PROBE_RESP:
2728 ieee80211_rx_mgmt_probe_resp(sdata, skb);
2729 break;
2730 case IEEE80211_STYPE_AUTH:
2731 rma = ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
2732 break;
2733 case IEEE80211_STYPE_DEAUTH:
2734 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
2735 break;
2736 case IEEE80211_STYPE_DISASSOC:
2737 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
2738 break;
2739 case IEEE80211_STYPE_ASSOC_RESP:
2740 case IEEE80211_STYPE_REASSOC_RESP:
2741 rma = ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, &bss);
2742 break;
2743 case IEEE80211_STYPE_ACTION:
2744 switch (mgmt->u.action.category) {
2745 case WLAN_CATEGORY_SPECTRUM_MGMT:
2746 ieee80211_sta_process_chanswitch(sdata,
2747 &mgmt->u.action.u.chan_switch.sw_elem,
2748 (void *)ifmgd->associated->priv,
2749 rx_status->mactime);
77fdaa12 2750 break;
77fdaa12 2751 }
77fdaa12 2752 }
77fdaa12
JB		 2753 mutex_unlock(&ifmgd->mtx);
2754
66e67e41
JB		 2755 switch (rma) {
2756 case RX_MGMT_NONE:
2757 /* no action */
2758 break;
2759 case RX_MGMT_CFG80211_DEAUTH:
ce470613 2760 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
66e67e41
JB		 2761 break;
2762 case RX_MGMT_CFG80211_DISASSOC:
2763 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
2764 break;
2765 case RX_MGMT_CFG80211_RX_AUTH:
2766 cfg80211_send_rx_auth(sdata->dev, (u8 *)mgmt, skb->len);
2767 break;
2768 case RX_MGMT_CFG80211_RX_ASSOC:
2769 cfg80211_send_rx_assoc(sdata->dev, bss, (u8 *)mgmt, skb->len);
2770 break;
2771 case RX_MGMT_CFG80211_ASSOC_TIMEOUT:
2772 cfg80211_send_assoc_timeout(sdata->dev, mgmt->bssid);
2773 break;
2774 default:
2775 WARN(1, "unexpected: %d", rma);
b054b747 2776 }
f0706e82
JB		 2777}
2778
9c6bd790 2779static void ieee80211_sta_timer(unsigned long data)
f0706e82 2780{
60f8b39c
JB		 2781 struct ieee80211_sub_if_data *sdata =
2782 (struct ieee80211_sub_if_data *) data;
46900298 2783 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
60f8b39c 2784 struct ieee80211_local *local = sdata->local;
f0706e82 2785
5bb644a0
JB		 2786 if (local->quiescing) {
2787 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2788 return;
2789 }
2790
64592c8f 2791 ieee80211_queue_work(&local->hw, &sdata->work);
f0706e82
JB		 2792}
2793
04ac3c0e 2794static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
95acac61 2795 u8 *bssid, u8 reason)
04ac3c0e
FF		 2796{
2797 struct ieee80211_local *local = sdata->local;
2798 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 2799 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
04ac3c0e 2800
37ad3888
JB		 2801 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
2802 false, frame_buf);
04ac3c0e 2803 mutex_unlock(&ifmgd->mtx);
37ad3888 2804
04ac3c0e
FF		 2805 /*
2806 * must be outside lock due to cfg80211,
2807 * but that's not a problem.
2808 */
6ae16775 2809 cfg80211_send_deauth(sdata->dev, frame_buf, IEEE80211_DEAUTH_FRAME_LEN);
fcac4fb0
FF		 2810
2811 mutex_lock(&local->mtx);
2812 ieee80211_recalc_idle(local);
2813 mutex_unlock(&local->mtx);
2814
04ac3c0e
FF		 2815 mutex_lock(&ifmgd->mtx);
2816}
2817
66e67e41
JB		 2818static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
2819{
2820 struct ieee80211_local *local = sdata->local;
2821 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2822 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
2823
2824 lockdep_assert_held(&ifmgd->mtx);
2825
2826 if (WARN_ON_ONCE(!auth_data))
2827 return -EINVAL;
2828
66e67e41
JB		 2829 auth_data->tries++;
2830
2831 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
bdcbd8e0
JB		 2832 sdata_info(sdata, "authentication with %pM timed out\n",
2833 auth_data->bss->bssid);
66e67e41
JB		 2834
2835 /*
2836 * Most likely AP is not in the range so remove the
2837 * bss struct for that AP.
2838 */
2839 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
2840
2841 return -ETIMEDOUT;
2842 }
2843
a1845fc7
JB		 2844 drv_mgd_prepare_tx(local, sdata);
2845
66e67e41 2846 if (auth_data->bss->proberesp_ies) {
6b8ece3a
JM		 2847 u16 trans = 1;
2848 u16 status = 0;
2849
bdcbd8e0
JB		 2850 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
2851 auth_data->bss->bssid, auth_data->tries,
2852 IEEE80211_AUTH_MAX_TRIES);
66e67e41
JB		 2853
2854 auth_data->expected_transaction = 2;
6b8ece3a
JM		 2855
2856 if (auth_data->algorithm == WLAN_AUTH_SAE) {
2857 trans = auth_data->sae_trans;
2858 status = auth_data->sae_status;
2859 auth_data->expected_transaction = trans;
2860 }
2861
2862 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
2863 auth_data->data, auth_data->data_len,
66e67e41
JB		 2864 auth_data->bss->bssid,
2865 auth_data->bss->bssid, NULL, 0, 0);
2866 } else {
2867 const u8 *ssidie;
2868
bdcbd8e0
JB		 2869 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
2870 auth_data->bss->bssid, auth_data->tries,
2871 IEEE80211_AUTH_MAX_TRIES);
66e67e41 2872
9caf0364 2873 rcu_read_lock();
66e67e41 2874 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
9caf0364
JB		 2875 if (!ssidie) {
2876 rcu_read_unlock();
66e67e41 2877 return -EINVAL;
9caf0364 2878 }
66e67e41
JB		 2879 /*
2880 * Direct probe is sent to broadcast address as some APs
2881 * will not answer to direct packet in unassociated state.
2882 */
2883 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
fe94fe05 2884 NULL, 0, (u32) -1, true, false,
55de908a 2885 auth_data->bss->channel, false);
9caf0364 2886 rcu_read_unlock();
66e67e41
JB		 2887 }
2888
2889 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
2890 run_again(ifmgd, auth_data->timeout);
2891
2892 return 0;
2893}
2894
2895static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
2896{
2897 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2898 struct ieee80211_local *local = sdata->local;
2899
2900 lockdep_assert_held(&sdata->u.mgd.mtx);
2901
66e67e41
JB		 2902 assoc_data->tries++;
2903 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
bdcbd8e0
JB		 2904 sdata_info(sdata, "association with %pM timed out\n",
2905 assoc_data->bss->bssid);
66e67e41
JB		 2906
2907 /*
2908 * Most likely AP is not in the range so remove the
2909 * bss struct for that AP.
2910 */
2911 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
2912
2913 return -ETIMEDOUT;
2914 }
2915
bdcbd8e0
JB		 2916 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
2917 assoc_data->bss->bssid, assoc_data->tries,
2918 IEEE80211_ASSOC_MAX_TRIES);
66e67e41
JB		 2919 ieee80211_send_assoc(sdata);
2920
2921 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
2922 run_again(&sdata->u.mgd, assoc_data->timeout);
2923
2924 return 0;
2925}
2926
1fa57d01 2927void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 2928{
9c6bd790 2929 struct ieee80211_local *local = sdata->local;
1fa57d01 2930 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 2931
77fdaa12
JB		 2932 mutex_lock(&ifmgd->mtx);
2933
66e67e41
JB		 2934 if (ifmgd->auth_data &&
2935 time_after(jiffies, ifmgd->auth_data->timeout)) {
2936 if (ifmgd->auth_data->done) {
2937 /*
2938 * ok ... we waited for assoc but userspace didn't,
2939 * so let's just kill the auth data
2940 */
2941 ieee80211_destroy_auth_data(sdata, false);
2942 } else if (ieee80211_probe_auth(sdata)) {
2943 u8 bssid[ETH_ALEN];
2944
2945 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2946
2947 ieee80211_destroy_auth_data(sdata, false);
2948
2949 mutex_unlock(&ifmgd->mtx);
2950 cfg80211_send_auth_timeout(sdata->dev, bssid);
2951 mutex_lock(&ifmgd->mtx);
2952 }
2953 } else if (ifmgd->auth_data)
2954 run_again(ifmgd, ifmgd->auth_data->timeout);
2955
2956 if (ifmgd->assoc_data &&
2957 time_after(jiffies, ifmgd->assoc_data->timeout)) {
2958 if (!ifmgd->assoc_data->have_beacon ||
2959 ieee80211_do_assoc(sdata)) {
2960 u8 bssid[ETH_ALEN];
2961
2962 memcpy(bssid, ifmgd->assoc_data->bss->bssid, ETH_ALEN);
2963
2964 ieee80211_destroy_assoc_data(sdata, false);
2965
2966 mutex_unlock(&ifmgd->mtx);
2967 cfg80211_send_assoc_timeout(sdata->dev, bssid);
2968 mutex_lock(&ifmgd->mtx);
2969 }
2970 } else if (ifmgd->assoc_data)
2971 run_again(ifmgd, ifmgd->assoc_data->timeout);
2972
b291ba11
JB		 2973 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2974 IEEE80211_STA_CONNECTION_POLL) &&
2975 ifmgd->associated) {
a43abf29 2976 u8 bssid[ETH_ALEN];
72a8a3ed 2977 int max_tries;
a43abf29 2978
0c1ad2ca 2979 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 2980
72a8a3ed 2981 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
180205bd 2982 max_tries = max_nullfunc_tries;
72a8a3ed 2983 else
180205bd 2984 max_tries = max_probe_tries;
72a8a3ed 2985
4e5ff376
FF		 2986 /* ACK received for nullfunc probing frame */
2987 if (!ifmgd->probe_send_count)
2988 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 2989 else if (ifmgd->nullfunc_failed) {
2990 if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 2991 mlme_dbg(sdata,
2992 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
2993 bssid, ifmgd->probe_send_count,
2994 max_tries);
04ac3c0e
FF		 2995 ieee80211_mgd_probe_ap_send(sdata);
2996 } else {
bdcbd8e0
JB		 2997 mlme_dbg(sdata,
2998 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
2999 bssid);
95acac61
JB		 3000 ieee80211_sta_connection_lost(sdata, bssid,
3001 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
04ac3c0e
FF		 3002 }
3003 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
b291ba11 3004 run_again(ifmgd, ifmgd->probe_timeout);
04ac3c0e 3005 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
bdcbd8e0
JB		 3006 mlme_dbg(sdata,
3007 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3008 bssid, probe_wait_ms);
95acac61
JB		 3009 ieee80211_sta_connection_lost(sdata, bssid,
3010 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
04ac3c0e 3011 } else if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3012 mlme_dbg(sdata,
3013 "No probe response from AP %pM after %dms, try %d/%i\n",
3014 bssid, probe_wait_ms,
3015 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 3016 ieee80211_mgd_probe_ap_send(sdata);
3017 } else {
b291ba11
JB		 3018 /*
3019 * We actually lost the connection ... or did we?
3020 * Let's make sure!
3021 */
b38afa87
BG		 3022 wiphy_debug(local->hw.wiphy,
3023 "%s: No probe response from AP %pM"
3024 " after %dms, disconnecting.\n",
3025 sdata->name,
180205bd 3026 bssid, probe_wait_ms);
04ac3c0e 3027
95acac61
JB		 3028 ieee80211_sta_connection_lost(sdata, bssid,
3029 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
b291ba11
JB		 3030 }
3031 }
3032
77fdaa12 3033 mutex_unlock(&ifmgd->mtx);
66e67e41
JB		 3034
3035 mutex_lock(&local->mtx);
3036 ieee80211_recalc_idle(local);
3037 mutex_unlock(&local->mtx);
f0706e82
JB		 3038}
3039
b291ba11
JB		 3040static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3041{
3042 struct ieee80211_sub_if_data *sdata =
3043 (struct ieee80211_sub_if_data *) data;
3044 struct ieee80211_local *local = sdata->local;
3045
3046 if (local->quiescing)
3047 return;
3048
1e4dcd01
JO		 3049 ieee80211_queue_work(&sdata->local->hw,
3050 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 3051}
3052
3053static void ieee80211_sta_conn_mon_timer(unsigned long data)
3054{
3055 struct ieee80211_sub_if_data *sdata =
3056 (struct ieee80211_sub_if_data *) data;
3057 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3058 struct ieee80211_local *local = sdata->local;
3059
3060 if (local->quiescing)
3061 return;
3062
42935eca 3063 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 3064}
3065
3066static void ieee80211_sta_monitor_work(struct work_struct *work)
3067{
3068 struct ieee80211_sub_if_data *sdata =
3069 container_of(work, struct ieee80211_sub_if_data,
3070 u.mgd.monitor_work);
3071
3072 ieee80211_mgd_probe_ap(sdata, false);
3073}
3074
9c6bd790
JB		 3075static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3076{
494f1fe5
EP		 3077 u32 flags;
3078
ad935687 3079 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
925e64c3 3080 __ieee80211_stop_poll(sdata);
ad935687 3081
b291ba11 3082 /* let's probe the connection once */
494f1fe5
EP		 3083 flags = sdata->local->hw.flags;
3084 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3085 ieee80211_queue_work(&sdata->local->hw,
3086 &sdata->u.mgd.monitor_work);
b291ba11 3087 /* and do all the other regular work too */
64592c8f 3088 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 3089 }
9c6bd790 3090}
f0706e82 3091
5bb644a0
JB		 3092#ifdef CONFIG_PM
3093void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
3094{
3095 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3096
3097 /*
3098 * we need to use atomic bitops for the running bits
3099 * only because both timers might fire at the same
3100 * time -- the code here is properly synchronised.
3101 */
3102
d1f5b7a3
JB		 3103 cancel_work_sync(&ifmgd->request_smps_work);
3104
0ecfe806 3105 cancel_work_sync(&ifmgd->monitor_work);
1e4dcd01 3106 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
882a7c69 3107 cancel_work_sync(&ifmgd->csa_connection_drop_work);
5bb644a0
JB		 3108 if (del_timer_sync(&ifmgd->timer))
3109 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
3110
3111 cancel_work_sync(&ifmgd->chswitch_work);
3112 if (del_timer_sync(&ifmgd->chswitch_timer))
3113 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
b291ba11 3114
b291ba11
JB		 3115 /* these will just be re-established on connection */
3116 del_timer_sync(&ifmgd->conn_mon_timer);
3117 del_timer_sync(&ifmgd->bcn_mon_timer);
5bb644a0
JB		 3118}
3119
3120void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
3121{
3122 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3123
676b58c2
RM		 3124 if (!ifmgd->associated)
3125 return;
3126
95acac61
JB		 3127 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
3128 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
3129 mutex_lock(&ifmgd->mtx);
3130 if (ifmgd->associated) {
bdcbd8e0
JB		 3131 mlme_dbg(sdata,
3132 "driver requested disconnect after resume\n");
95acac61
JB		 3133 ieee80211_sta_connection_lost(sdata,
3134 ifmgd->associated->bssid,
3135 WLAN_REASON_UNSPECIFIED);
3136 mutex_unlock(&ifmgd->mtx);
3137 return;
3138 }
3139 mutex_unlock(&ifmgd->mtx);
3140 }
3141
5bb644a0
JB		 3142 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
3143 add_timer(&ifmgd->timer);
3144 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
3145 add_timer(&ifmgd->chswitch_timer);
c8a7972c 3146 ieee80211_sta_reset_beacon_monitor(sdata);
925e64c3
SG		 3147
3148 mutex_lock(&sdata->local->mtx);
46090979 3149 ieee80211_restart_sta_timer(sdata);
925e64c3 3150 mutex_unlock(&sdata->local->mtx);
5bb644a0
JB		 3151}
3152#endif
3153
9c6bd790
JB		 3154/* interface setup */
3155void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 3156{
46900298 3157 struct ieee80211_if_managed *ifmgd;
988c0f72 3158
46900298 3159 ifmgd = &sdata->u.mgd;
b291ba11 3160 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 3161 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 3162 INIT_WORK(&ifmgd->beacon_connection_loss_work,
3163 ieee80211_beacon_connection_loss_work);
882a7c69
JB		 3164 INIT_WORK(&ifmgd->csa_connection_drop_work,
3165 ieee80211_csa_connection_drop_work);
d1f5b7a3 3166 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
46900298 3167 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 3168 (unsigned long) sdata);
b291ba11
JB		 3169 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
3170 (unsigned long) sdata);
3171 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
3172 (unsigned long) sdata);
46900298 3173 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 3174 (unsigned long) sdata);
9c6bd790 3175
ab1faead 3176 ifmgd->flags = 0;
1478acb3 3177 ifmgd->powersave = sdata->wdev.ps;
dc41e4d4
EP		 3178 ifmgd->uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
3179 ifmgd->uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
bbbdff9e 3180
77fdaa12 3181 mutex_init(&ifmgd->mtx);
0f78231b
JB		 3182
3183 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
3184 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
3185 else
3186 ifmgd->req_smps = IEEE80211_SMPS_OFF;
f0706e82
JB		 3187}
3188
77fdaa12
JB		 3189/* scan finished notification */
3190void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 3191{
31ee67a1 3192 struct ieee80211_sub_if_data *sdata;
60f8b39c 3193
77fdaa12
JB		 3194 /* Restart STA timers */
3195 rcu_read_lock();
3196 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3197 ieee80211_restart_sta_timer(sdata);
3198 rcu_read_unlock();
3199}
60f8b39c 3200
77fdaa12
JB		 3201int ieee80211_max_network_latency(struct notifier_block *nb,
3202 unsigned long data, void *dummy)
3203{
3204 s32 latency_usec = (s32) data;
3205 struct ieee80211_local *local =
3206 container_of(nb, struct ieee80211_local,
3207 network_latency_notifier);
1fa6f4af 3208
77fdaa12
JB		 3209 mutex_lock(&local->iflist_mtx);
3210 ieee80211_recalc_ps(local, latency_usec);
3211 mutex_unlock(&local->iflist_mtx);
dfe67012 3212
77fdaa12 3213 return 0;
9c6bd790
JB		 3214}
3215
f2d9d270
JB		 3216static u32 chandef_downgrade(struct cfg80211_chan_def *c)
3217{
3218 u32 ret;
3219 int tmp;
3220
3221 switch (c->width) {
3222 case NL80211_CHAN_WIDTH_20:
3223 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3224 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3225 break;
3226 case NL80211_CHAN_WIDTH_40:
3227 c->width = NL80211_CHAN_WIDTH_20;
3228 c->center_freq1 = c->chan->center_freq;
3229 ret = IEEE80211_STA_DISABLE_40MHZ |
3230 IEEE80211_STA_DISABLE_VHT;
3231 break;
3232 case NL80211_CHAN_WIDTH_80:
3233 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
3234 /* n_P40 */
3235 tmp /= 2;
3236 /* freq_P40 */
3237 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
3238 c->width = NL80211_CHAN_WIDTH_40;
3239 ret = IEEE80211_STA_DISABLE_VHT;
3240 break;
3241 case NL80211_CHAN_WIDTH_80P80:
3242 c->center_freq2 = 0;
3243 c->width = NL80211_CHAN_WIDTH_80;
3244 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3245 IEEE80211_STA_DISABLE_160MHZ;
3246 break;
3247 case NL80211_CHAN_WIDTH_160:
3248 /* n_P20 */
3249 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
3250 /* n_P80 */
3251 tmp /= 4;
3252 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
3253 c->width = NL80211_CHAN_WIDTH_80;
3254 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3255 IEEE80211_STA_DISABLE_160MHZ;
3256 break;
3257 default:
3258 case NL80211_CHAN_WIDTH_20_NOHT:
3259 WARN_ON_ONCE(1);
3260 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3261 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3262 break;
3263 }
3264
3265 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
3266
3267 return ret;
3268}
3269
3270static u32
3271ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
3272 struct ieee80211_supported_band *sband,
3273 struct ieee80211_channel *channel,
3274 const struct ieee80211_ht_operation *ht_oper,
3275 const struct ieee80211_vht_operation *vht_oper,
3276 struct cfg80211_chan_def *chandef)
3277{
3278 struct cfg80211_chan_def vht_chandef;
3279 u32 ht_cfreq, ret;
3280
3281 chandef->chan = channel;
3282 chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
3283 chandef->center_freq1 = channel->center_freq;
3284 chandef->center_freq2 = 0;
3285
3286 if (!ht_oper || !sband->ht_cap.ht_supported) {
3287 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3288 goto out;
3289 }
3290
3291 chandef->width = NL80211_CHAN_WIDTH_20;
3292
3293 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
3294 channel->band);
3295 /* check that channel matches the right operating channel */
3296 if (channel->center_freq != ht_cfreq) {
3297 /*
3298 * It's possible that some APs are confused here;
3299 * Netgear WNDR3700 sometimes reports 4 higher than
3300 * the actual channel in association responses, but
3301 * since we look at probe response/beacon data here
3302 * it should be OK.
3303 */
3304 sdata_info(sdata,
3305 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
3306 channel->center_freq, ht_cfreq,
3307 ht_oper->primary_chan, channel->band);
3308 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3309 goto out;
3310 }
3311
3312 /* check 40 MHz support, if we have it */
3313 if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
3314 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
3315 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3316 chandef->width = NL80211_CHAN_WIDTH_40;
3317 chandef->center_freq1 += 10;
3318 break;
3319 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3320 chandef->width = NL80211_CHAN_WIDTH_40;
3321 chandef->center_freq1 -= 10;
3322 break;
3323 }
3324 } else {
3325 /* 40 MHz (and 80 MHz) must be supported for VHT */
3326 ret = IEEE80211_STA_DISABLE_VHT;
3327 goto out;
3328 }
3329
3330 if (!vht_oper || !sband->vht_cap.vht_supported) {
3331 ret = IEEE80211_STA_DISABLE_VHT;
3332 goto out;
3333 }
3334
3335 vht_chandef.chan = channel;
3336 vht_chandef.center_freq1 =
3337 ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx,
3338 channel->band);
3339 vht_chandef.center_freq2 = 0;
3340
3341 if (vht_oper->center_freq_seg2_idx)
3342 vht_chandef.center_freq2 =
3343 ieee80211_channel_to_frequency(
3344 vht_oper->center_freq_seg2_idx,
3345 channel->band);
3346
3347 switch (vht_oper->chan_width) {
3348 case IEEE80211_VHT_CHANWIDTH_USE_HT:
3349 vht_chandef.width = chandef->width;
3350 break;
3351 case IEEE80211_VHT_CHANWIDTH_80MHZ:
3352 vht_chandef.width = NL80211_CHAN_WIDTH_80;
3353 break;
3354 case IEEE80211_VHT_CHANWIDTH_160MHZ:
3355 vht_chandef.width = NL80211_CHAN_WIDTH_160;
3356 break;
3357 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
3358 vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
3359 break;
3360 default:
3361 sdata_info(sdata,
3362 "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
3363 vht_oper->chan_width);
3364 ret = IEEE80211_STA_DISABLE_VHT;
3365 goto out;
3366 }
3367
3368 if (!cfg80211_chandef_valid(&vht_chandef)) {
3369 sdata_info(sdata,
3370 "AP VHT information is invalid, disable VHT\n");
3371 ret = IEEE80211_STA_DISABLE_VHT;
3372 goto out;
3373 }
3374
3375 if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
3376 ret = 0;
3377 goto out;
3378 }
3379
3380 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
3381 sdata_info(sdata,
3382 "AP VHT information doesn't match HT, disable VHT\n");
3383 ret = IEEE80211_STA_DISABLE_VHT;
3384 goto out;
3385 }
3386
3387 *chandef = vht_chandef;
3388
3389 ret = 0;
3390
3391 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
3392 IEEE80211_CHAN_DISABLED)) {
3393 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
3394 ret = IEEE80211_STA_DISABLE_HT |
3395 IEEE80211_STA_DISABLE_VHT;
3396 goto out;
3397 }
3398
3399 ret = chandef_downgrade(chandef);
3400 }
3401
3402 if (chandef->width != vht_chandef.width)
3403 sdata_info(sdata,
3404 "local regulatory prevented using AP HT/VHT configuration, downgraded\n");
3405
3406out:
3407 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
3408 return ret;
3409}
3410
3411static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
3412 struct cfg80211_bss *cbss)
3413{
3414 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3415 const u8 *ht_cap_ie, *vht_cap_ie;
3416 const struct ieee80211_ht_cap *ht_cap;
3417 const struct ieee80211_vht_cap *vht_cap;
3418 u8 chains = 1;
3419
3420 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
3421 return chains;
3422
9caf0364 3423 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
f2d9d270
JB		 3424 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
3425 ht_cap = (void *)(ht_cap_ie + 2);
3426 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
3427 /*
3428 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
3429 * "Tx Unequal Modulation Supported" fields.
3430 */
3431 }
3432
3433 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
3434 return chains;
3435
9caf0364 3436 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
f2d9d270
JB		 3437 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
3438 u8 nss;
3439 u16 tx_mcs_map;
3440
3441 vht_cap = (void *)(vht_cap_ie + 2);
3442 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
3443 for (nss = 8; nss > 0; nss--) {
3444 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
3445 IEEE80211_VHT_MCS_NOT_SUPPORTED)
3446 break;
3447 }
3448 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
3449 chains = max(chains, nss);
3450 }
3451
3452 return chains;
3453}
3454
b17166a7
JB		 3455static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
3456 struct cfg80211_bss *cbss)
a1cf775d
JB		 3457{
3458 struct ieee80211_local *local = sdata->local;
3459 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
24398e39 3460 const struct ieee80211_ht_operation *ht_oper = NULL;
f2d9d270 3461 const struct ieee80211_vht_operation *vht_oper = NULL;
24398e39 3462 struct ieee80211_supported_band *sband;
4bf88530 3463 struct cfg80211_chan_def chandef;
f2d9d270 3464 int ret;
a1cf775d 3465
24398e39
JB		 3466 sband = local->hw.wiphy->bands[cbss->channel->band];
3467
f2d9d270
JB		 3468 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
3469 IEEE80211_STA_DISABLE_80P80MHZ |
3470 IEEE80211_STA_DISABLE_160MHZ);
3471
9caf0364
JB		 3472 rcu_read_lock();
3473
f2d9d270
JB		 3474 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3475 sband->ht_cap.ht_supported) {
3476 const u8 *ht_oper_ie;
24398e39 3477
9caf0364 3478 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
24398e39
JB		 3479 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3480 ht_oper = (void *)(ht_oper_ie + 2);
3481 }
3482
f2d9d270
JB		 3483 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3484 sband->vht_cap.vht_supported) {
3485 const u8 *vht_oper_ie;
3486
9caf0364
JB		 3487 vht_oper_ie = ieee80211_bss_get_ie(cbss,
3488 WLAN_EID_VHT_OPERATION);
f2d9d270
JB		 3489 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
3490 vht_oper = (void *)(vht_oper_ie + 2);
3491 if (vht_oper && !ht_oper) {
3492 vht_oper = NULL;
bdcbd8e0 3493 sdata_info(sdata,
f2d9d270
JB		 3494 "AP advertised VHT without HT, disabling both\n");
3495 sdata->flags |= IEEE80211_STA_DISABLE_HT;
3496 sdata->flags |= IEEE80211_STA_DISABLE_VHT;
24398e39
JB		 3497 }
3498 }
3499
f2d9d270
JB		 3500 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
3501 cbss->channel,
3502 ht_oper, vht_oper,
3503 &chandef);
04ecd257 3504
f2d9d270
JB		 3505 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
3506 local->rx_chains);
24398e39 3507
9caf0364
JB		 3508 rcu_read_unlock();
3509
04ecd257
JB		 3510 /* will change later if needed */
3511 sdata->smps_mode = IEEE80211_SMPS_OFF;
3512
f2d9d270
JB		 3513 /*
3514 * If this fails (possibly due to channel context sharing
3515 * on incompatible channels, e.g. 80+80 and 160 sharing the
3516 * same control channel) try to use a smaller bandwidth.
3517 */
3518 ret = ieee80211_vif_use_channel(sdata, &chandef,
3519 IEEE80211_CHANCTX_SHARED);
3520 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT)
3521 ifmgd->flags |= chandef_downgrade(&chandef);
3522 return ret;
b17166a7
JB		 3523}
3524
3525static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
3526 struct cfg80211_bss *cbss, bool assoc)
3527{
3528 struct ieee80211_local *local = sdata->local;
3529 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3530 struct ieee80211_bss *bss = (void *)cbss->priv;
3531 struct sta_info *new_sta = NULL;
3532 bool have_sta = false;
3533 int err;
3534
3535 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3536 return -EINVAL;
3537
3538 if (assoc) {
3539 rcu_read_lock();
3540 have_sta = sta_info_get(sdata, cbss->bssid);
3541 rcu_read_unlock();
3542 }
3543
3544 if (!have_sta) {
3545 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
3546 if (!new_sta)
3547 return -ENOMEM;
3548 }
3549
3550 mutex_lock(&local->mtx);
3551 ieee80211_recalc_idle(sdata->local);
3552 mutex_unlock(&local->mtx);
3553
13e0c8e3 3554 if (new_sta) {
5d6a1b06
JB		 3555 u32 rates = 0, basic_rates = 0;
3556 bool have_higher_than_11mbit;
3557 int min_rate = INT_MAX, min_rate_index = -1;
b17166a7
JB		 3558 struct ieee80211_supported_band *sband;
3559
3560 sband = local->hw.wiphy->bands[cbss->channel->band];
3561
3562 err = ieee80211_prep_channel(sdata, cbss);
3563 if (err) {
3564 sta_info_free(local, new_sta);
3565 return err;
3566 }
5d6a1b06 3567
5d6a1b06
JB		 3568 ieee80211_get_rates(sband, bss->supp_rates,
3569 bss->supp_rates_len,
3570 &rates, &basic_rates,
3571 &have_higher_than_11mbit,
3572 &min_rate, &min_rate_index);
3573
3574 /*
3575 * This used to be a workaround for basic rates missing
3576 * in the association response frame. Now that we no
3577 * longer use the basic rates from there, it probably
3578 * doesn't happen any more, but keep the workaround so
3579 * in case some *other* APs are buggy in different ways
3580 * we can connect -- with a warning.
3581 */
3582 if (!basic_rates && min_rate_index >= 0) {
bdcbd8e0
JB		 3583 sdata_info(sdata,
3584 "No basic rates, using min rate instead\n");
5d6a1b06
JB		 3585 basic_rates = BIT(min_rate_index);
3586 }
3587
13e0c8e3 3588 new_sta->sta.supp_rates[cbss->channel->band] = rates;
5d6a1b06
JB		 3589 sdata->vif.bss_conf.basic_rates = basic_rates;
3590
3591 /* cf. IEEE 802.11 9.2.12 */
55de908a 3592 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
5d6a1b06
JB		 3593 have_higher_than_11mbit)
3594 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3595 else
3596 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
3597
3598 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
3599
8c358bcd
JB		 3600 /* set timing information */
3601 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
3602 sdata->vif.bss_conf.sync_tsf = cbss->tsf;
3603 sdata->vif.bss_conf.sync_device_ts = bss->device_ts;
3604
3605 /* tell driver about BSSID, basic rates and timing */
5d6a1b06 3606 ieee80211_bss_info_change_notify(sdata,
8c358bcd
JB		 3607 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
3608 BSS_CHANGED_BEACON_INT);
a1cf775d
JB		 3609
3610 if (assoc)
13e0c8e3 3611 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
a1cf775d 3612
13e0c8e3
JB		 3613 err = sta_info_insert(new_sta);
3614 new_sta = NULL;
a1cf775d 3615 if (err) {
bdcbd8e0
JB		 3616 sdata_info(sdata,
3617 "failed to insert STA entry for the AP (error %d)\n",
3618 err);
a1cf775d
JB		 3619 return err;
3620 }
3621 } else
b203ca39 3622 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
a1cf775d
JB		 3623
3624 return 0;
3625}
3626
77fdaa12
JB		 3627/* config hooks */
3628int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
3629 struct cfg80211_auth_request *req)
9c6bd790 3630{
66e67e41
JB		 3631 struct ieee80211_local *local = sdata->local;
3632 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3633 struct ieee80211_mgd_auth_data *auth_data;
77fdaa12 3634 u16 auth_alg;
66e67e41
JB		 3635 int err;
3636
3637 /* prepare auth data structure */
9c6bd790 3638
77fdaa12
JB		 3639 switch (req->auth_type) {
3640 case NL80211_AUTHTYPE_OPEN_SYSTEM:
3641 auth_alg = WLAN_AUTH_OPEN;
3642 break;
3643 case NL80211_AUTHTYPE_SHARED_KEY:
66e67e41 3644 if (IS_ERR(local->wep_tx_tfm))
9dca9c49 3645 return -EOPNOTSUPP;
77fdaa12
JB		 3646 auth_alg = WLAN_AUTH_SHARED_KEY;
3647 break;
3648 case NL80211_AUTHTYPE_FT:
3649 auth_alg = WLAN_AUTH_FT;
3650 break;
3651 case NL80211_AUTHTYPE_NETWORK_EAP:
3652 auth_alg = WLAN_AUTH_LEAP;
3653 break;
6b8ece3a
JM		 3654 case NL80211_AUTHTYPE_SAE:
3655 auth_alg = WLAN_AUTH_SAE;
3656 break;
77fdaa12
JB		 3657 default:
3658 return -EOPNOTSUPP;
60f8b39c 3659 }
77fdaa12 3660
6b8ece3a
JM		 3661 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
3662 req->ie_len, GFP_KERNEL);
66e67e41 3663 if (!auth_data)
9c6bd790 3664 return -ENOMEM;
77fdaa12 3665
66e67e41 3666 auth_data->bss = req->bss;
77fdaa12 3667
6b8ece3a
JM		 3668 if (req->sae_data_len >= 4) {
3669 __le16 *pos = (__le16 *) req->sae_data;
3670 auth_data->sae_trans = le16_to_cpu(pos[0]);
3671 auth_data->sae_status = le16_to_cpu(pos[1]);
3672 memcpy(auth_data->data, req->sae_data + 4,
3673 req->sae_data_len - 4);
3674 auth_data->data_len += req->sae_data_len - 4;
3675 }
3676
77fdaa12 3677 if (req->ie && req->ie_len) {
6b8ece3a
JM		 3678 memcpy(&auth_data->data[auth_data->data_len],
3679 req->ie, req->ie_len);
3680 auth_data->data_len += req->ie_len;
9c6bd790 3681 }
77fdaa12 3682
fffd0934 3683 if (req->key && req->key_len) {
66e67e41
JB		 3684 auth_data->key_len = req->key_len;
3685 auth_data->key_idx = req->key_idx;
3686 memcpy(auth_data->key, req->key, req->key_len);
fffd0934
JB		 3687 }
3688
66e67e41 3689 auth_data->algorithm = auth_alg;
60f8b39c 3690
66e67e41 3691 /* try to authenticate/probe */
2a33bee2 3692
66e67e41 3693 mutex_lock(&ifmgd->mtx);
2a33bee2 3694
66e67e41
JB		 3695 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
3696 ifmgd->assoc_data) {
3697 err = -EBUSY;
3698 goto err_free;
2a33bee2
GE		 3699 }
3700
66e67e41
JB		 3701 if (ifmgd->auth_data)
3702 ieee80211_destroy_auth_data(sdata, false);
2a33bee2 3703
66e67e41
JB		 3704 /* prep auth_data so we don't go into idle on disassoc */
3705 ifmgd->auth_data = auth_data;
af6b6374 3706
66e67e41 3707 if (ifmgd->associated)
37ad3888 3708 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
af6b6374 3709
bdcbd8e0 3710 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
e5b900d2 3711
a1cf775d
JB		 3712 err = ieee80211_prep_connection(sdata, req->bss, false);
3713 if (err)
66e67e41 3714 goto err_clear;
af6b6374 3715
66e67e41
JB		 3716 err = ieee80211_probe_auth(sdata);
3717 if (err) {
66e67e41
JB		 3718 sta_info_destroy_addr(sdata, req->bss->bssid);
3719 goto err_clear;
3720 }
3721
3722 /* hold our own reference */
3723 cfg80211_ref_bss(auth_data->bss);
3724 err = 0;
3725 goto out_unlock;
3726
3727 err_clear:
3d2abdfd
EP		 3728 memset(ifmgd->bssid, 0, ETH_ALEN);
3729 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 3730 ifmgd->auth_data = NULL;
3731 err_free:
3732 kfree(auth_data);
3733 out_unlock:
3734 mutex_unlock(&ifmgd->mtx);
b2abb6e2 3735
66e67e41 3736 return err;
af6b6374
JB		 3737}
3738
77fdaa12
JB		 3739int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
3740 struct cfg80211_assoc_request *req)
f0706e82 3741{
66e67e41 3742 struct ieee80211_local *local = sdata->local;
77fdaa12 3743 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 3744 struct ieee80211_bss *bss = (void *)req->bss->priv;
66e67e41 3745 struct ieee80211_mgd_assoc_data *assoc_data;
4e74bfdb 3746 struct ieee80211_supported_band *sband;
9dde6423 3747 const u8 *ssidie, *ht_ie;
2a33bee2 3748 int i, err;
f0706e82 3749
66e67e41
JB		 3750 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
3751 if (!assoc_data)
3752 return -ENOMEM;
3753
9caf0364
JB		 3754 rcu_read_lock();
3755 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
3756 if (!ssidie) {
3757 rcu_read_unlock();
3758 kfree(assoc_data);
3759 return -EINVAL;
3760 }
3761 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
3762 assoc_data->ssid_len = ssidie[1];
3763 rcu_read_unlock();
3764
77fdaa12 3765 mutex_lock(&ifmgd->mtx);
9c87ba67 3766
66e67e41 3767 if (ifmgd->associated)
37ad3888 3768 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
66e67e41
JB		 3769
3770 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
3771 err = -EBUSY;
3772 goto err_free;
af6b6374 3773 }
77fdaa12 3774
66e67e41
JB		 3775 if (ifmgd->assoc_data) {
3776 err = -EBUSY;
3777 goto err_free;
3778 }
77fdaa12 3779
66e67e41
JB		 3780 if (ifmgd->auth_data) {
3781 bool match;
3782
3783 /* keep sta info, bssid if matching */
b203ca39 3784 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
66e67e41 3785 ieee80211_destroy_auth_data(sdata, match);
2a33bee2
GE		 3786 }
3787
66e67e41 3788 /* prepare assoc data */
19c3b830 3789
d8ec4433
JO		 3790 ifmgd->beacon_crc_valid = false;
3791
de5036aa
JB		 3792 /*
3793 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
3794 * We still associate in non-HT mode (11a/b/g) if any one of these
3795 * ciphers is configured as pairwise.
3796 * We can set this to true for non-11n hardware, that'll be checked
3797 * separately along with the peer capabilities.
3798 */
1c4cb928 3799 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
77fdaa12
JB		 3800 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
3801 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
1c4cb928 3802 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
a8243b72 3803 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
d545daba 3804 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
1c4cb928 3805 netdev_info(sdata->dev,
d545daba 3806 "disabling HT/VHT due to WEP/TKIP use\n");
1c4cb928
JB		 3807 }
3808 }
77fdaa12 3809
d545daba 3810 if (req->flags & ASSOC_REQ_DISABLE_HT) {
a8243b72 3811 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
d545daba
MP		 3812 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3813 }
ef96a842 3814
4e74bfdb
JB		 3815 /* Also disable HT if we don't support it or the AP doesn't use WMM */
3816 sband = local->hw.wiphy->bands[req->bss->channel->band];
3817 if (!sband->ht_cap.ht_supported ||
1c4cb928 3818 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
a8243b72 3819 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
1b49de26
JB		 3820 if (!bss->wmm_used)
3821 netdev_info(sdata->dev,
3822 "disabling HT as WMM/QoS is not supported by the AP\n");
1c4cb928 3823 }
4e74bfdb 3824
d545daba
MP		 3825 /* disable VHT if we don't support it or the AP doesn't use WMM */
3826 if (!sband->vht_cap.vht_supported ||
3827 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
3828 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
1b49de26
JB		 3829 if (!bss->wmm_used)
3830 netdev_info(sdata->dev,
3831 "disabling VHT as WMM/QoS is not supported by the AP\n");
d545daba
MP		 3832 }
3833
ef96a842
BG		 3834 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
3835 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
3836 sizeof(ifmgd->ht_capa_mask));
3837
77fdaa12 3838 if (req->ie && req->ie_len) {
66e67e41
JB		 3839 memcpy(assoc_data->ie, req->ie, req->ie_len);
3840 assoc_data->ie_len = req->ie_len;
3841 }
f679f65d 3842
66e67e41 3843 assoc_data->bss = req->bss;
f679f65d 3844
af6b6374
JB		 3845 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
3846 if (ifmgd->powersave)
04ecd257 3847 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
af6b6374 3848 else
04ecd257 3849 sdata->smps_mode = IEEE80211_SMPS_OFF;
af6b6374 3850 } else
04ecd257 3851 sdata->smps_mode = ifmgd->req_smps;
af6b6374 3852
66e67e41 3853 assoc_data->capability = req->bss->capability;
32c5057b
JB		 3854 assoc_data->wmm = bss->wmm_used &&
3855 (local->hw.queues >= IEEE80211_NUM_ACS);
66e67e41
JB		 3856 assoc_data->supp_rates = bss->supp_rates;
3857 assoc_data->supp_rates_len = bss->supp_rates_len;
9dde6423 3858
9caf0364 3859 rcu_read_lock();
9dde6423
JB		 3860 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
3861 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
3862 assoc_data->ap_ht_param =
3863 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
3864 else
a8243b72 3865 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
9caf0364 3866 rcu_read_unlock();
63f170e0 3867
ab13315a
KV		 3868 if (bss->wmm_used && bss->uapsd_supported &&
3869 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
76f0303d 3870 assoc_data->uapsd = true;
ab13315a
KV		 3871 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
3872 } else {
76f0303d 3873 assoc_data->uapsd = false;
ab13315a
KV		 3874 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
3875 }
3876
77fdaa12 3877 if (req->prev_bssid)
66e67e41 3878 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12
JB		 3879
3880 if (req->use_mfp) {
3881 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
3882 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
3883 } else {
3884 ifmgd->mfp = IEEE80211_MFP_DISABLED;
3885 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
3886 }
3887
3888 if (req->crypto.control_port)
3889 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
3890 else
3891 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
3892
a621fa4d
JB		 3893 sdata->control_port_protocol = req->crypto.control_port_ethertype;
3894 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
3895
66e67e41
JB		 3896 /* kick off associate process */
3897
3898 ifmgd->assoc_data = assoc_data;
3899
a1cf775d
JB		 3900 err = ieee80211_prep_connection(sdata, req->bss, true);
3901 if (err)
3902 goto err_clear;
66e67e41
JB		 3903
3904 if (!bss->dtim_period &&
3905 sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD) {
3906 /*
3907 * Wait up to one beacon interval ...
3908 * should this be more if we miss one?
3909 */
bdcbd8e0
JB		 3910 sdata_info(sdata, "waiting for beacon from %pM\n",
3911 ifmgd->bssid);
3f9768a5 3912 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
66e67e41
JB		 3913 } else {
3914 assoc_data->have_beacon = true;
3915 assoc_data->sent_assoc = false;
3916 assoc_data->timeout = jiffies;
3917 }
3918 run_again(ifmgd, assoc_data->timeout);
3919
fcff4f10
PS		 3920 if (bss->corrupt_data) {
3921 char *corrupt_type = "data";
3922 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
3923 if (bss->corrupt_data &
3924 IEEE80211_BSS_CORRUPT_PROBE_RESP)
3925 corrupt_type = "beacon and probe response";
3926 else
3927 corrupt_type = "beacon";
3928 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
3929 corrupt_type = "probe response";
bdcbd8e0
JB		 3930 sdata_info(sdata, "associating with AP with corrupt %s\n",
3931 corrupt_type);
fcff4f10
PS		 3932 }
3933
66e67e41
JB		 3934 err = 0;
3935 goto out;
3936 err_clear:
3d2abdfd
EP		 3937 memset(ifmgd->bssid, 0, ETH_ALEN);
3938 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 3939 ifmgd->assoc_data = NULL;
3940 err_free:
3941 kfree(assoc_data);
3942 out:
3943 mutex_unlock(&ifmgd->mtx);
3944
3945 return err;
f0706e82
JB		 3946}
3947
77fdaa12 3948int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
63c9c5e7 3949 struct cfg80211_deauth_request *req)
f0706e82 3950{
46900298 3951 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 3952 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
6863255b 3953 bool tx = !req->local_state_change;
86552017 3954 bool sent_frame = false;
f0706e82 3955
77fdaa12
JB		 3956 mutex_lock(&ifmgd->mtx);
3957
bdcbd8e0
JB		 3958 sdata_info(sdata,
3959 "deauthenticating from %pM by local choice (reason=%d)\n",
3960 req->bssid, req->reason_code);
0ff71613 3961
86552017 3962 if (ifmgd->auth_data) {
8c7d857c 3963 drv_mgd_prepare_tx(sdata->local, sdata);
37ad3888
JB		 3964 ieee80211_send_deauth_disassoc(sdata, req->bssid,
3965 IEEE80211_STYPE_DEAUTH,
6863255b 3966 req->reason_code, tx,
37ad3888 3967 frame_buf);
86552017
JB		 3968 ieee80211_destroy_auth_data(sdata, false);
3969 mutex_unlock(&ifmgd->mtx);
3970
3971 sent_frame = tx;
3972 goto out;
8c7d857c
EG		 3973 }
3974
86552017
JB		 3975 if (ifmgd->associated &&
3976 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
3977 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3978 req->reason_code, tx, frame_buf);
3979 sent_frame = tx;
3980 }
37ad3888
JB		 3981 mutex_unlock(&ifmgd->mtx);
3982
86552017 3983 out:
7da7cc1d 3984 mutex_lock(&sdata->local->mtx);
bc83b681 3985 ieee80211_recalc_idle(sdata->local);
7da7cc1d 3986 mutex_unlock(&sdata->local->mtx);
bc83b681 3987
86552017
JB		 3988 if (sent_frame)
3989 __cfg80211_send_deauth(sdata->dev, frame_buf,
3990 IEEE80211_DEAUTH_FRAME_LEN);
3991
f0706e82
JB		 3992 return 0;
3993}
84363e6e 3994
77fdaa12 3995int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 3996 struct cfg80211_disassoc_request *req)
9c6bd790 3997{
77fdaa12 3998 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 3999 u8 bssid[ETH_ALEN];
6ae16775 4000 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
9c6bd790 4001
77fdaa12 4002 mutex_lock(&ifmgd->mtx);
10f644a4 4003
8d8b261a
JB		 4004 /*
4005 * cfg80211 should catch this ... but it's racy since
4006 * we can receive a disassoc frame, process it, hand it
4007 * to cfg80211 while that's in a locked section already
4008 * trying to tell us that the user wants to disconnect.
4009 */
0c1ad2ca 4010 if (ifmgd->associated != req->bss) {
77fdaa12
JB		 4011 mutex_unlock(&ifmgd->mtx);
4012 return -ENOLINK;
4013 }
4014
bdcbd8e0
JB		 4015 sdata_info(sdata,
4016 "disassociating from %pM by local choice (reason=%d)\n",
4017 req->bss->bssid, req->reason_code);
0ff71613 4018
e69e95db 4019 memcpy(bssid, req->bss->bssid, ETH_ALEN);
37ad3888
JB		 4020 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4021 req->reason_code, !req->local_state_change,
4022 frame_buf);
77fdaa12 4023 mutex_unlock(&ifmgd->mtx);
10f644a4 4024
6ae16775
AQ		 4025 __cfg80211_send_disassoc(sdata->dev, frame_buf,
4026 IEEE80211_DEAUTH_FRAME_LEN);
bc83b681 4027
7da7cc1d 4028 mutex_lock(&sdata->local->mtx);
bc83b681 4029 ieee80211_recalc_idle(sdata->local);
7da7cc1d 4030 mutex_unlock(&sdata->local->mtx);
bc83b681 4031
10f644a4
JB		 4032 return 0;
4033}
026331c4 4034
afa762f6 4035void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
54e4ffb2
JB		 4036{
4037 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4038
4039 mutex_lock(&ifmgd->mtx);
4040 if (ifmgd->assoc_data)
4041 ieee80211_destroy_assoc_data(sdata, false);
4042 if (ifmgd->auth_data)
4043 ieee80211_destroy_auth_data(sdata, false);
4044 del_timer_sync(&ifmgd->timer);
4045 mutex_unlock(&ifmgd->mtx);
4046}
4047
a97c13c3
JO		 4048void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
4049 enum nl80211_cqm_rssi_threshold_event rssi_event,
4050 gfp_t gfp)
4051{
4052 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4053
b5878a2d
JB		 4054 trace_api_cqm_rssi_notify(sdata, rssi_event);
4055
a97c13c3
JO		 4056 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
4057}
4058EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
Linux kernel - Deliverables
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