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mac80211: remove mesh config macros from mesh_plink.c
[mirror_ubuntu-zesty-kernel.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 }
194 chan = chanctx_conf->channel;
195 rcu_read_unlock();
196 sband = local->hw.wiphy->bands[chan->band];
d5522e03 197
64f68e5d
JB		 198 switch (sdata->vif.bss_conf.channel_type) {
199 case NL80211_CHAN_HT40PLUS:
55de908a 200 if (chan->flags & IEEE80211_CHAN_NO_HT40PLUS)
64f68e5d
JB		 201 disable_40 = true;
202 break;
203 case NL80211_CHAN_HT40MINUS:
55de908a 204 if (chan->flags & IEEE80211_CHAN_NO_HT40MINUS)
64f68e5d
JB		 205 disable_40 = true;
206 break;
207 default:
208 break;
209 }
d5522e03 210
24398e39
JB		 211 /* This can change during the lifetime of the BSS */
212 if (!(ht_oper->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY))
64f68e5d
JB		 213 disable_40 = true;
214
215 mutex_lock(&local->sta_mtx);
216 sta = sta_info_get(sdata, bssid);
d5522e03 217
64f68e5d
JB		 218 WARN_ON_ONCE(!sta);
219
220 if (sta && !sta->supports_40mhz)
221 disable_40 = true;
222
223 if (sta && (!reconfig ||
91a0099c 224 (disable_40 != !(sta->sta.ht_cap.cap &
64f68e5d 225 IEEE80211_HT_CAP_SUP_WIDTH_20_40)))) {
d5522e03 226
64f68e5d
JB		 227 if (disable_40)
228 sta->sta.ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
229 else
230 sta->sta.ht_cap.cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
7cc44ed4 231
64f68e5d 232 rate_control_rate_update(local, sband, sta,
8f727ef3 233 IEEE80211_RC_BW_CHANGED);
0aaffa9b 234 }
64f68e5d 235 mutex_unlock(&local->sta_mtx);
d5522e03 236
074d46d1 237 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
d5522e03
JB		 238
239 /* if bss configuration changed store the new one */
24398e39 240 if (!reconfig || (sdata->vif.bss_conf.ht_operation_mode != ht_opmode)) {
d5522e03 241 changed |= BSS_CHANGED_HT;
9ed6bcce 242 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
d5522e03
JB		 243 }
244
245 return changed;
246}
247
9c6bd790
JB		 248/* frame sending functions */
249
66e67e41
JB		 250static int ieee80211_compatible_rates(const u8 *supp_rates, int supp_rates_len,
251 struct ieee80211_supported_band *sband,
252 u32 *rates)
253{
254 int i, j, count;
255 *rates = 0;
256 count = 0;
257 for (i = 0; i < supp_rates_len; i++) {
258 int rate = (supp_rates[i] & 0x7F) * 5;
259
260 for (j = 0; j < sband->n_bitrates; j++)
261 if (sband->bitrates[j].bitrate == rate) {
262 *rates |= BIT(j);
263 count++;
264 break;
265 }
266 }
267
268 return count;
269}
270
271static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
9dde6423 272 struct sk_buff *skb, u8 ap_ht_param,
66e67e41
JB		 273 struct ieee80211_supported_band *sband,
274 struct ieee80211_channel *channel,
275 enum ieee80211_smps_mode smps)
276{
66e67e41
JB		 277 u8 *pos;
278 u32 flags = channel->flags;
279 u16 cap;
280 struct ieee80211_sta_ht_cap ht_cap;
281
282 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
283
66e67e41
JB		 284 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
285 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
286
66e67e41
JB		 287 /* determine capability flags */
288 cap = ht_cap.cap;
289
9dde6423 290 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
66e67e41
JB		 291 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
292 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
293 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
294 cap &= ~IEEE80211_HT_CAP_SGI_40;
295 }
296 break;
297 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
298 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
299 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
300 cap &= ~IEEE80211_HT_CAP_SGI_40;
301 }
302 break;
303 }
304
24398e39
JB		 305 /*
306 * If 40 MHz was disabled associate as though we weren't
307 * capable of 40 MHz -- some broken APs will never fall
308 * back to trying to transmit in 20 MHz.
309 */
310 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
311 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
312 cap &= ~IEEE80211_HT_CAP_SGI_40;
313 }
314
66e67e41
JB		 315 /* set SM PS mode properly */
316 cap &= ~IEEE80211_HT_CAP_SM_PS;
317 switch (smps) {
318 case IEEE80211_SMPS_AUTOMATIC:
319 case IEEE80211_SMPS_NUM_MODES:
320 WARN_ON(1);
321 case IEEE80211_SMPS_OFF:
322 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
323 IEEE80211_HT_CAP_SM_PS_SHIFT;
324 break;
325 case IEEE80211_SMPS_STATIC:
326 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
327 IEEE80211_HT_CAP_SM_PS_SHIFT;
328 break;
329 case IEEE80211_SMPS_DYNAMIC:
330 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
331 IEEE80211_HT_CAP_SM_PS_SHIFT;
332 break;
333 }
334
335 /* reserve and fill IE */
336 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
337 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
338}
339
d545daba
MP		 340static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
341 struct sk_buff *skb,
342 struct ieee80211_supported_band *sband)
343{
344 u8 *pos;
345 u32 cap;
346 struct ieee80211_sta_vht_cap vht_cap;
347
348 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
349
350 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
351
352 /* determine capability flags */
353 cap = vht_cap.cap;
354
355 /* reserve and fill IE */
d4950281 356 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
d545daba
MP		 357 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
358}
359
66e67e41
JB		 360static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
361{
362 struct ieee80211_local *local = sdata->local;
363 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
364 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
365 struct sk_buff *skb;
366 struct ieee80211_mgmt *mgmt;
367 u8 *pos, qos_info;
368 size_t offset = 0, noffset;
369 int i, count, rates_len, supp_rates_len;
370 u16 capab;
371 struct ieee80211_supported_band *sband;
55de908a
JB		 372 struct ieee80211_chanctx_conf *chanctx_conf;
373 struct ieee80211_channel *chan;
66e67e41 374 u32 rates = 0;
66e67e41
JB		 375
376 lockdep_assert_held(&ifmgd->mtx);
377
55de908a
JB		 378 rcu_read_lock();
379 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
380 if (WARN_ON(!chanctx_conf)) {
381 rcu_read_unlock();
382 return;
383 }
384 chan = chanctx_conf->channel;
385 rcu_read_unlock();
386 sband = local->hw.wiphy->bands[chan->band];
66e67e41
JB		 387
388 if (assoc_data->supp_rates_len) {
389 /*
390 * Get all rates supported by the device and the AP as
391 * some APs don't like getting a superset of their rates
392 * in the association request (e.g. D-Link DAP 1353 in
393 * b-only mode)...
394 */
395 rates_len = ieee80211_compatible_rates(assoc_data->supp_rates,
396 assoc_data->supp_rates_len,
397 sband, &rates);
398 } else {
399 /*
400 * In case AP not provide any supported rates information
401 * before association, we send information element(s) with
402 * all rates that we support.
403 */
404 rates = ~0;
405 rates_len = sband->n_bitrates;
406 }
407
408 skb = alloc_skb(local->hw.extra_tx_headroom +
409 sizeof(*mgmt) + /* bit too much but doesn't matter */
410 2 + assoc_data->ssid_len + /* SSID */
411 4 + rates_len + /* (extended) rates */
412 4 + /* power capability */
413 2 + 2 * sband->n_channels + /* supported channels */
414 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
d4950281 415 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
66e67e41
JB		 416 assoc_data->ie_len + /* extra IEs */
417 9, /* WMM */
418 GFP_KERNEL);
419 if (!skb)
420 return;
421
422 skb_reserve(skb, local->hw.extra_tx_headroom);
423
424 capab = WLAN_CAPABILITY_ESS;
425
426 if (sband->band == IEEE80211_BAND_2GHZ) {
427 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
428 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
429 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
430 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
431 }
432
433 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
434 capab |= WLAN_CAPABILITY_PRIVACY;
435
436 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
437 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
438 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
439
440 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
441 memset(mgmt, 0, 24);
442 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
443 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
444 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
445
446 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
447 skb_put(skb, 10);
448 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
449 IEEE80211_STYPE_REASSOC_REQ);
450 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
451 mgmt->u.reassoc_req.listen_interval =
452 cpu_to_le16(local->hw.conf.listen_interval);
453 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
454 ETH_ALEN);
455 } else {
456 skb_put(skb, 4);
457 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
458 IEEE80211_STYPE_ASSOC_REQ);
459 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
460 mgmt->u.assoc_req.listen_interval =
461 cpu_to_le16(local->hw.conf.listen_interval);
462 }
463
464 /* SSID */
465 pos = skb_put(skb, 2 + assoc_data->ssid_len);
466 *pos++ = WLAN_EID_SSID;
467 *pos++ = assoc_data->ssid_len;
468 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
469
470 /* add all rates which were marked to be used above */
471 supp_rates_len = rates_len;
472 if (supp_rates_len > 8)
473 supp_rates_len = 8;
474
475 pos = skb_put(skb, supp_rates_len + 2);
476 *pos++ = WLAN_EID_SUPP_RATES;
477 *pos++ = supp_rates_len;
478
479 count = 0;
480 for (i = 0; i < sband->n_bitrates; i++) {
481 if (BIT(i) & rates) {
482 int rate = sband->bitrates[i].bitrate;
483 *pos++ = (u8) (rate / 5);
484 if (++count == 8)
485 break;
486 }
487 }
488
489 if (rates_len > count) {
490 pos = skb_put(skb, rates_len - count + 2);
491 *pos++ = WLAN_EID_EXT_SUPP_RATES;
492 *pos++ = rates_len - count;
493
494 for (i++; i < sband->n_bitrates; i++) {
495 if (BIT(i) & rates) {
496 int rate = sband->bitrates[i].bitrate;
497 *pos++ = (u8) (rate / 5);
498 }
499 }
500 }
501
502 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
503 /* 1. power capabilities */
504 pos = skb_put(skb, 4);
505 *pos++ = WLAN_EID_PWR_CAPABILITY;
506 *pos++ = 2;
507 *pos++ = 0; /* min tx power */
55de908a 508 *pos++ = chan->max_power; /* max tx power */
66e67e41
JB		 509
510 /* 2. supported channels */
511 /* TODO: get this in reg domain format */
512 pos = skb_put(skb, 2 * sband->n_channels + 2);
513 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
514 *pos++ = 2 * sband->n_channels;
515 for (i = 0; i < sband->n_channels; i++) {
516 *pos++ = ieee80211_frequency_to_channel(
517 sband->channels[i].center_freq);
518 *pos++ = 1; /* one channel in the subband*/
519 }
520 }
521
522 /* if present, add any custom IEs that go before HT */
523 if (assoc_data->ie_len && assoc_data->ie) {
524 static const u8 before_ht[] = {
525 WLAN_EID_SSID,
526 WLAN_EID_SUPP_RATES,
527 WLAN_EID_EXT_SUPP_RATES,
528 WLAN_EID_PWR_CAPABILITY,
529 WLAN_EID_SUPPORTED_CHANNELS,
530 WLAN_EID_RSN,
531 WLAN_EID_QOS_CAPA,
532 WLAN_EID_RRM_ENABLED_CAPABILITIES,
533 WLAN_EID_MOBILITY_DOMAIN,
534 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
535 };
536 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
537 before_ht, ARRAY_SIZE(before_ht),
538 offset);
539 pos = skb_put(skb, noffset - offset);
540 memcpy(pos, assoc_data->ie + offset, noffset - offset);
541 offset = noffset;
542 }
543
a8243b72 544 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
9dde6423 545 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
04ecd257 546 sband, chan, sdata->smps_mode);
66e67e41 547
d545daba
MP		 548 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
549 ieee80211_add_vht_ie(sdata, skb, sband);
550
66e67e41
JB		 551 /* if present, add any custom non-vendor IEs that go after HT */
552 if (assoc_data->ie_len && assoc_data->ie) {
553 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
554 assoc_data->ie_len,
555 offset);
556 pos = skb_put(skb, noffset - offset);
557 memcpy(pos, assoc_data->ie + offset, noffset - offset);
558 offset = noffset;
559 }
560
76f0303d
JB		 561 if (assoc_data->wmm) {
562 if (assoc_data->uapsd) {
dc41e4d4
EP		 563 qos_info = ifmgd->uapsd_queues;
564 qos_info |= (ifmgd->uapsd_max_sp_len <<
66e67e41
JB		 565 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
566 } else {
567 qos_info = 0;
568 }
569
570 pos = skb_put(skb, 9);
571 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
572 *pos++ = 7; /* len */
573 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
574 *pos++ = 0x50;
575 *pos++ = 0xf2;
576 *pos++ = 2; /* WME */
577 *pos++ = 0; /* WME info */
578 *pos++ = 1; /* WME ver */
579 *pos++ = qos_info;
580 }
581
582 /* add any remaining custom (i.e. vendor specific here) IEs */
583 if (assoc_data->ie_len && assoc_data->ie) {
584 noffset = assoc_data->ie_len;
585 pos = skb_put(skb, noffset - offset);
586 memcpy(pos, assoc_data->ie + offset, noffset - offset);
587 }
588
a1845fc7
JB		 589 drv_mgd_prepare_tx(local, sdata);
590
66e67e41
JB		 591 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
592 ieee80211_tx_skb(sdata, skb);
593}
594
572e0012
KV		 595void ieee80211_send_pspoll(struct ieee80211_local *local,
596 struct ieee80211_sub_if_data *sdata)
597{
572e0012
KV		 598 struct ieee80211_pspoll *pspoll;
599 struct sk_buff *skb;
572e0012 600
d8cd189e
KV		 601 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
602 if (!skb)
572e0012 603 return;
572e0012 604
d8cd189e
KV		 605 pspoll = (struct ieee80211_pspoll *) skb->data;
606 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
572e0012 607
62ae67be
JB		 608 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
609 ieee80211_tx_skb(sdata, skb);
572e0012
KV		 610}
611
965bedad
JB		 612void ieee80211_send_nullfunc(struct ieee80211_local *local,
613 struct ieee80211_sub_if_data *sdata,
614 int powersave)
615{
616 struct sk_buff *skb;
d8cd189e 617 struct ieee80211_hdr_3addr *nullfunc;
b6f35301 618 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
965bedad 619
d8cd189e
KV		 620 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
621 if (!skb)
965bedad 622 return;
965bedad 623
d8cd189e 624 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
965bedad 625 if (powersave)
d8cd189e 626 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
965bedad 627
62ae67be 628 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
b6f35301
RM		 629 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
630 IEEE80211_STA_CONNECTION_POLL))
631 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
632
62ae67be 633 ieee80211_tx_skb(sdata, skb);
965bedad
JB		 634}
635
d524215f
FF		 636static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
637 struct ieee80211_sub_if_data *sdata)
638{
639 struct sk_buff *skb;
640 struct ieee80211_hdr *nullfunc;
641 __le16 fc;
642
643 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
644 return;
645
646 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
d15b8459 647 if (!skb)
d524215f 648 return;
d15b8459 649
d524215f
FF		 650 skb_reserve(skb, local->hw.extra_tx_headroom);
651
652 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
653 memset(nullfunc, 0, 30);
654 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
655 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
656 nullfunc->frame_control = fc;
657 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
658 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
659 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
660 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
661
662 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
663 ieee80211_tx_skb(sdata, skb);
664}
665
cc32abd4
JB		 666/* spectrum management related things */
667static void ieee80211_chswitch_work(struct work_struct *work)
668{
669 struct ieee80211_sub_if_data *sdata =
670 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
cc32abd4
JB		 671 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
672
9607e6b6 673 if (!ieee80211_sdata_running(sdata))
cc32abd4
JB		 674 return;
675
77fdaa12
JB		 676 mutex_lock(&ifmgd->mtx);
677 if (!ifmgd->associated)
678 goto out;
cc32abd4 679
55de908a 680 sdata->local->_oper_channel = sdata->local->csa_channel;
5ce6e438
JB		 681 if (!sdata->local->ops->channel_switch) {
682 /* call "hw_config" only if doing sw channel switch */
683 ieee80211_hw_config(sdata->local,
684 IEEE80211_CONF_CHANGE_CHANNEL);
1ea57b1f
SL		 685 } else {
686 /* update the device channel directly */
55de908a 687 sdata->local->hw.conf.channel = sdata->local->_oper_channel;
5ce6e438 688 }
77fdaa12 689
cc32abd4 690 /* XXX: shouldn't really modify cfg80211-owned data! */
55de908a 691 ifmgd->associated->channel = sdata->local->_oper_channel;
cc32abd4 692
57eebdf3 693 /* XXX: wait for a beacon first? */
cc32abd4
JB		 694 ieee80211_wake_queues_by_reason(&sdata->local->hw,
695 IEEE80211_QUEUE_STOP_REASON_CSA);
77fdaa12
JB		 696 out:
697 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
698 mutex_unlock(&ifmgd->mtx);
cc32abd4
JB		 699}
700
5ce6e438
JB		 701void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
702{
55de908a
JB		 703 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
704 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5ce6e438
JB		 705
706 trace_api_chswitch_done(sdata, success);
707 if (!success) {
882a7c69
JB		 708 sdata_info(sdata,
709 "driver channel switch failed, disconnecting\n");
710 ieee80211_queue_work(&sdata->local->hw,
711 &ifmgd->csa_connection_drop_work);
712 } else {
713 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
5ce6e438 714 }
5ce6e438
JB		 715}
716EXPORT_SYMBOL(ieee80211_chswitch_done);
717
cc32abd4
JB		 718static void ieee80211_chswitch_timer(unsigned long data)
719{
720 struct ieee80211_sub_if_data *sdata =
721 (struct ieee80211_sub_if_data *) data;
722 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
723
5bb644a0
JB		 724 if (sdata->local->quiescing) {
725 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
726 return;
727 }
728
42935eca 729 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4
JB		 730}
731
732void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
733 struct ieee80211_channel_sw_ie *sw_elem,
5ce6e438
JB		 734 struct ieee80211_bss *bss,
735 u64 timestamp)
cc32abd4 736{
0c1ad2ca
JB		 737 struct cfg80211_bss *cbss =
738 container_of((void *)bss, struct cfg80211_bss, priv);
cc32abd4
JB		 739 struct ieee80211_channel *new_ch;
740 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
59eb21a6
BR		 741 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num,
742 cbss->channel->band);
55de908a 743 struct ieee80211_chanctx *chanctx;
cc32abd4 744
77fdaa12
JB		 745 ASSERT_MGD_MTX(ifmgd);
746
747 if (!ifmgd->associated)
cc32abd4
JB		 748 return;
749
fbe9c429 750 if (sdata->local->scanning)
cc32abd4
JB		 751 return;
752
753 /* Disregard subsequent beacons if we are already running a timer
754 processing a CSA */
755
756 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
757 return;
758
759 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
882a7c69
JB		 760 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED) {
761 sdata_info(sdata,
762 "AP %pM switches to unsupported channel (%d MHz), disconnecting\n",
763 ifmgd->associated->bssid, new_freq);
764 ieee80211_queue_work(&sdata->local->hw,
765 &ifmgd->csa_connection_drop_work);
cc32abd4 766 return;
882a7c69 767 }
cc32abd4 768
57eebdf3
JB		 769 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
770
55de908a
JB		 771 if (sdata->local->use_chanctx) {
772 sdata_info(sdata,
773 "not handling channel switch with channel contexts\n");
774 ieee80211_queue_work(&sdata->local->hw,
775 &ifmgd->csa_connection_drop_work);
776 }
777
778 mutex_lock(&sdata->local->chanctx_mtx);
779 if (WARN_ON(!rcu_access_pointer(sdata->vif.chanctx_conf))) {
780 mutex_unlock(&sdata->local->chanctx_mtx);
781 return;
782 }
783 chanctx = container_of(rcu_access_pointer(sdata->vif.chanctx_conf),
784 struct ieee80211_chanctx, conf);
785 if (chanctx->refcount > 1) {
786 sdata_info(sdata,
787 "channel switch with multiple interfaces on the same channel, disconnecting\n");
788 ieee80211_queue_work(&sdata->local->hw,
789 &ifmgd->csa_connection_drop_work);
790 mutex_unlock(&sdata->local->chanctx_mtx);
791 return;
792 }
793 mutex_unlock(&sdata->local->chanctx_mtx);
794
795 sdata->local->csa_channel = new_ch;
796
57eebdf3
JB		 797 if (sw_elem->mode)
798 ieee80211_stop_queues_by_reason(&sdata->local->hw,
799 IEEE80211_QUEUE_STOP_REASON_CSA);
800
5ce6e438
JB		 801 if (sdata->local->ops->channel_switch) {
802 /* use driver's channel switch callback */
57eebdf3
JB		 803 struct ieee80211_channel_switch ch_switch = {
804 .timestamp = timestamp,
805 .block_tx = sw_elem->mode,
806 .channel = new_ch,
807 .count = sw_elem->count,
808 };
809
5ce6e438
JB		 810 drv_channel_switch(sdata->local, &ch_switch);
811 return;
812 }
813
814 /* channel switch handled in software */
57eebdf3 815 if (sw_elem->count <= 1)
42935eca 816 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
57eebdf3 817 else
cc32abd4 818 mod_timer(&ifmgd->chswitch_timer,
3049000b
JB		 819 TU_TO_EXP_TIME(sw_elem->count *
820 cbss->beacon_interval));
cc32abd4
JB		 821}
822
1ea6f9c0
JB		 823static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
824 struct ieee80211_channel *channel,
825 const u8 *country_ie, u8 country_ie_len,
826 const u8 *pwr_constr_elem)
cc32abd4 827{
04b7b2ff
JB		 828 struct ieee80211_country_ie_triplet *triplet;
829 int chan = ieee80211_frequency_to_channel(channel->center_freq);
830 int i, chan_pwr, chan_increment, new_ap_level;
831 bool have_chan_pwr = false;
cc32abd4 832
04b7b2ff
JB		 833 /* Invalid IE */
834 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1ea6f9c0 835 return 0;
cc32abd4 836
04b7b2ff
JB		 837 triplet = (void *)(country_ie + 3);
838 country_ie_len -= 3;
839
840 switch (channel->band) {
841 default:
842 WARN_ON_ONCE(1);
843 /* fall through */
844 case IEEE80211_BAND_2GHZ:
845 case IEEE80211_BAND_60GHZ:
846 chan_increment = 1;
847 break;
848 case IEEE80211_BAND_5GHZ:
849 chan_increment = 4;
850 break;
cc32abd4 851 }
04b7b2ff
JB		 852
853 /* find channel */
854 while (country_ie_len >= 3) {
855 u8 first_channel = triplet->chans.first_channel;
856
857 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
858 goto next;
859
860 for (i = 0; i < triplet->chans.num_channels; i++) {
861 if (first_channel + i * chan_increment == chan) {
862 have_chan_pwr = true;
863 chan_pwr = triplet->chans.max_power;
864 break;
865 }
866 }
867 if (have_chan_pwr)
868 break;
869
870 next:
871 triplet++;
872 country_ie_len -= 3;
873 }
874
875 if (!have_chan_pwr)
1ea6f9c0 876 return 0;
04b7b2ff
JB		 877
878 new_ap_level = max_t(int, 0, chan_pwr - *pwr_constr_elem);
879
1ea6f9c0
JB		 880 if (sdata->ap_power_level == new_ap_level)
881 return 0;
04b7b2ff
JB		 882
883 sdata_info(sdata,
884 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
885 new_ap_level, chan_pwr, *pwr_constr_elem,
886 sdata->u.mgd.bssid);
1ea6f9c0
JB		 887 sdata->ap_power_level = new_ap_level;
888 if (__ieee80211_recalc_txpower(sdata))
889 return BSS_CHANGED_TXPOWER;
890 return 0;
cc32abd4
JB		 891}
892
f90754c1
JO		 893void ieee80211_enable_dyn_ps(struct ieee80211_vif *vif)
894{
895 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
896 struct ieee80211_local *local = sdata->local;
897 struct ieee80211_conf *conf = &local->hw.conf;
898
899 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
900 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
901 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
902
903 local->disable_dynamic_ps = false;
904 conf->dynamic_ps_timeout = local->dynamic_ps_user_timeout;
905}
906EXPORT_SYMBOL(ieee80211_enable_dyn_ps);
907
908void ieee80211_disable_dyn_ps(struct ieee80211_vif *vif)
909{
910 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
911 struct ieee80211_local *local = sdata->local;
912 struct ieee80211_conf *conf = &local->hw.conf;
913
914 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
915 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
916 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
917
918 local->disable_dynamic_ps = true;
919 conf->dynamic_ps_timeout = 0;
920 del_timer_sync(&local->dynamic_ps_timer);
921 ieee80211_queue_work(&local->hw,
922 &local->dynamic_ps_enable_work);
923}
924EXPORT_SYMBOL(ieee80211_disable_dyn_ps);
925
965bedad
JB		 926/* powersave */
927static void ieee80211_enable_ps(struct ieee80211_local *local,
928 struct ieee80211_sub_if_data *sdata)
929{
930 struct ieee80211_conf *conf = &local->hw.conf;
931
d5edaedc
JB		 932 /*
933 * If we are scanning right now then the parameters will
934 * take effect when scan finishes.
935 */
fbe9c429 936 if (local->scanning)
d5edaedc
JB		 937 return;
938
965bedad
JB		 939 if (conf->dynamic_ps_timeout > 0 &&
940 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
941 mod_timer(&local->dynamic_ps_timer, jiffies +
942 msecs_to_jiffies(conf->dynamic_ps_timeout));
943 } else {
944 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
945 ieee80211_send_nullfunc(local, sdata, 1);
375177bf 946
2a13052f
JO		 947 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
948 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
949 return;
950
951 conf->flags |= IEEE80211_CONF_PS;
952 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965bedad
JB		 953 }
954}
955
956static void ieee80211_change_ps(struct ieee80211_local *local)
957{
958 struct ieee80211_conf *conf = &local->hw.conf;
959
960 if (local->ps_sdata) {
965bedad
JB		 961 ieee80211_enable_ps(local, local->ps_sdata);
962 } else if (conf->flags & IEEE80211_CONF_PS) {
963 conf->flags &= ~IEEE80211_CONF_PS;
964 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965 del_timer_sync(&local->dynamic_ps_timer);
966 cancel_work_sync(&local->dynamic_ps_enable_work);
967 }
968}
969
808118cb
JY		 970static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
971{
972 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
973 struct sta_info *sta = NULL;
c2c98fde 974 bool authorized = false;
808118cb
JY		 975
976 if (!mgd->powersave)
977 return false;
978
05cb9108
JB		 979 if (mgd->broken_ap)
980 return false;
981
808118cb
JY		 982 if (!mgd->associated)
983 return false;
984
808118cb
JY		 985 if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
986 IEEE80211_STA_CONNECTION_POLL))
987 return false;
988
989 rcu_read_lock();
990 sta = sta_info_get(sdata, mgd->bssid);
991 if (sta)
c2c98fde 992 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
808118cb
JY		 993 rcu_read_unlock();
994
c2c98fde 995 return authorized;
808118cb
JY		 996}
997
965bedad 998/* need to hold RTNL or interface lock */
10f644a4 999void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 1000{
1001 struct ieee80211_sub_if_data *sdata, *found = NULL;
1002 int count = 0;
195e294d 1003 int timeout;
965bedad
JB		 1004
1005 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
1006 local->ps_sdata = NULL;
1007 return;
1008 }
1009
1010 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 1011 if (!ieee80211_sdata_running(sdata))
965bedad 1012 continue;
8c7914de
RM		 1013 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1014 /* If an AP vif is found, then disable PS
1015 * by setting the count to zero thereby setting
1016 * ps_sdata to NULL.
1017 */
1018 count = 0;
1019 break;
1020 }
965bedad
JB		 1021 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1022 continue;
1023 found = sdata;
1024 count++;
1025 }
1026
808118cb 1027 if (count == 1 && ieee80211_powersave_allowed(found)) {
f90754c1 1028 struct ieee80211_conf *conf = &local->hw.conf;
10f644a4
JB		 1029 s32 beaconint_us;
1030
1031 if (latency < 0)
ed77134b 1032 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
10f644a4
JB		 1033
1034 beaconint_us = ieee80211_tu_to_usec(
1035 found->vif.bss_conf.beacon_int);
1036
ff616381 1037 timeout = local->dynamic_ps_forced_timeout;
195e294d
JO		 1038 if (timeout < 0) {
1039 /*
ff616381
JO		 1040 * Go to full PSM if the user configures a very low
1041 * latency requirement.
0ab82b04
EP		 1042 * The 2000 second value is there for compatibility
1043 * until the PM_QOS_NETWORK_LATENCY is configured
1044 * with real values.
195e294d 1045 */
0ab82b04
EP		 1046 if (latency > (1900 * USEC_PER_MSEC) &&
1047 latency != (2000 * USEC_PER_SEC))
195e294d 1048 timeout = 0;
ff616381
JO		 1049 else
1050 timeout = 100;
195e294d 1051 }
f90754c1
JO		 1052 local->dynamic_ps_user_timeout = timeout;
1053 if (!local->disable_dynamic_ps)
1054 conf->dynamic_ps_timeout =
1055 local->dynamic_ps_user_timeout;
195e294d 1056
04fe2037 1057 if (beaconint_us > latency) {
10f644a4 1058 local->ps_sdata = NULL;
04fe2037 1059 } else {
56007a02 1060 struct ieee80211_bss *bss;
04fe2037 1061 int maxslp = 1;
56007a02 1062 u8 dtimper;
04fe2037 1063
56007a02
JB		 1064 bss = (void *)found->u.mgd.associated->priv;
1065 dtimper = bss->dtim_period;
1066
1067 /* If the TIM IE is invalid, pretend the value is 1 */
1068 if (!dtimper)
1069 dtimper = 1;
1070 else if (dtimper > 1)
04fe2037
JB		 1071 maxslp = min_t(int, dtimper,
1072 latency / beaconint_us);
1073
9ccebe61 1074 local->hw.conf.max_sleep_period = maxslp;
56007a02 1075 local->hw.conf.ps_dtim_period = dtimper;
10f644a4 1076 local->ps_sdata = found;
04fe2037 1077 }
10f644a4 1078 } else {
965bedad 1079 local->ps_sdata = NULL;
10f644a4 1080 }
965bedad
JB		 1081
1082 ieee80211_change_ps(local);
1083}
1084
ab095877
EP		 1085void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1086{
1087 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1088
1089 if (sdata->vif.bss_conf.ps != ps_allowed) {
1090 sdata->vif.bss_conf.ps = ps_allowed;
1091 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1092 }
1093}
1094
965bedad
JB		 1095void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1096{
1097 struct ieee80211_local *local =
1098 container_of(work, struct ieee80211_local,
1099 dynamic_ps_disable_work);
1100
1101 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1102 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1103 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1104 }
1105
1106 ieee80211_wake_queues_by_reason(&local->hw,
1107 IEEE80211_QUEUE_STOP_REASON_PS);
1108}
1109
1110void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1111{
1112 struct ieee80211_local *local =
1113 container_of(work, struct ieee80211_local,
1114 dynamic_ps_enable_work);
1115 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
5e34069c 1116 struct ieee80211_if_managed *ifmgd;
1ddc2867
RM		 1117 unsigned long flags;
1118 int q;
965bedad
JB		 1119
1120 /* can only happen when PS was just disabled anyway */
1121 if (!sdata)
1122 return;
1123
5e34069c
CL		 1124 ifmgd = &sdata->u.mgd;
1125
965bedad
JB		 1126 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1127 return;
1128
77b7023a
AN		 1129 if (!local->disable_dynamic_ps &&
1130 local->hw.conf.dynamic_ps_timeout > 0) {
1131 /* don't enter PS if TX frames are pending */
1132 if (drv_tx_frames_pending(local)) {
1ddc2867
RM		 1133 mod_timer(&local->dynamic_ps_timer, jiffies +
1134 msecs_to_jiffies(
1135 local->hw.conf.dynamic_ps_timeout));
1136 return;
1137 }
77b7023a
AN		 1138
1139 /*
1140 * transmission can be stopped by others which leads to
1141 * dynamic_ps_timer expiry. Postpone the ps timer if it
1142 * is not the actual idle state.
1143 */
1144 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1145 for (q = 0; q < local->hw.queues; q++) {
1146 if (local->queue_stop_reasons[q]) {
1147 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1148 flags);
1149 mod_timer(&local->dynamic_ps_timer, jiffies +
1150 msecs_to_jiffies(
1151 local->hw.conf.dynamic_ps_timeout));
1152 return;
1153 }
1154 }
1155 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1ddc2867 1156 }
1ddc2867 1157
375177bf 1158 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
9c38a8b4 1159 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
f3e85b9e 1160 netif_tx_stop_all_queues(sdata->dev);
965bedad 1161
e8306f98
VN		 1162 if (drv_tx_frames_pending(local))
1163 mod_timer(&local->dynamic_ps_timer, jiffies +
1164 msecs_to_jiffies(
1165 local->hw.conf.dynamic_ps_timeout));
1166 else {
1167 ieee80211_send_nullfunc(local, sdata, 1);
1168 /* Flush to get the tx status of nullfunc frame */
1169 drv_flush(local, false);
1170 }
f3e85b9e
VN		 1171 }
1172
2a13052f
JO		 1173 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1174 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
375177bf
VN		 1175 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1176 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1177 local->hw.conf.flags |= IEEE80211_CONF_PS;
1178 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1179 }
f3e85b9e 1180
77b7023a
AN		 1181 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1182 netif_tx_wake_all_queues(sdata->dev);
965bedad
JB		 1183}
1184
1185void ieee80211_dynamic_ps_timer(unsigned long data)
1186{
1187 struct ieee80211_local *local = (void *) data;
1188
78f1a8b7 1189 if (local->quiescing || local->suspended)
5bb644a0
JB		 1190 return;
1191
42935eca 1192 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 1193}
1194
60f8b39c 1195/* MLME */
7d25745d 1196static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
4ced3f74 1197 struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1198 u8 *wmm_param, size_t wmm_param_len)
1199{
f0706e82 1200 struct ieee80211_tx_queue_params params;
4ced3f74 1201 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1202 size_t left;
1203 int count;
ab13315a 1204 u8 *pos, uapsd_queues = 0;
f0706e82 1205
e1b3ec1a 1206 if (!local->ops->conf_tx)
7d25745d 1207 return false;
e1b3ec1a 1208
32c5057b 1209 if (local->hw.queues < IEEE80211_NUM_ACS)
7d25745d 1210 return false;
3434fbd3
JB		 1211
1212 if (!wmm_param)
7d25745d 1213 return false;
3434fbd3 1214
f0706e82 1215 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
7d25745d 1216 return false;
ab13315a
KV		 1217
1218 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
dc41e4d4 1219 uapsd_queues = ifmgd->uapsd_queues;
ab13315a 1220
f0706e82 1221 count = wmm_param[6] & 0x0f;
46900298 1222 if (count == ifmgd->wmm_last_param_set)
7d25745d 1223 return false;
46900298 1224 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 1225
1226 pos = wmm_param + 8;
1227 left = wmm_param_len - 8;
1228
1229 memset(&params, 0, sizeof(params));
1230
00e96dec 1231 sdata->wmm_acm = 0;
f0706e82
JB		 1232 for (; left >= 4; left -= 4, pos += 4) {
1233 int aci = (pos[0] >> 5) & 0x03;
1234 int acm = (pos[0] >> 4) & 0x01;
ab13315a 1235 bool uapsd = false;
f0706e82
JB		 1236 int queue;
1237
1238 switch (aci) {
0eeb59fe 1239 case 1: /* AC_BK */
e100bb64 1240 queue = 3;
988c0f72 1241 if (acm)
00e96dec 1242 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV		 1243 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1244 uapsd = true;
f0706e82 1245 break;
0eeb59fe 1246 case 2: /* AC_VI */
e100bb64 1247 queue = 1;
988c0f72 1248 if (acm)
00e96dec 1249 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV		 1250 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1251 uapsd = true;
f0706e82 1252 break;
0eeb59fe 1253 case 3: /* AC_VO */
e100bb64 1254 queue = 0;
988c0f72 1255 if (acm)
00e96dec 1256 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV		 1257 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1258 uapsd = true;
f0706e82 1259 break;
0eeb59fe 1260 case 0: /* AC_BE */
f0706e82 1261 default:
e100bb64 1262 queue = 2;
988c0f72 1263 if (acm)
00e96dec 1264 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV		 1265 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1266 uapsd = true;
f0706e82
JB		 1267 break;
1268 }
1269
1270 params.aifs = pos[0] & 0x0f;
1271 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1272 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 1273 params.txop = get_unaligned_le16(pos + 2);
ab13315a
KV		 1274 params.uapsd = uapsd;
1275
bdcbd8e0
JB		 1276 mlme_dbg(sdata,
1277 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1278 queue, aci, acm,
1279 params.aifs, params.cw_min, params.cw_max,
1280 params.txop, params.uapsd);
f6f3def3
EP		 1281 sdata->tx_conf[queue] = params;
1282 if (drv_conf_tx(local, sdata, queue, &params))
bdcbd8e0
JB		 1283 sdata_err(sdata,
1284 "failed to set TX queue parameters for queue %d\n",
1285 queue);
f0706e82 1286 }
e1b3ec1a
SG		 1287
1288 /* enable WMM or activate new settings */
4ced3f74 1289 sdata->vif.bss_conf.qos = true;
7d25745d 1290 return true;
f0706e82
JB		 1291}
1292
925e64c3
SG		 1293static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1294{
1295 lockdep_assert_held(&sdata->local->mtx);
1296
1297 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1298 IEEE80211_STA_BEACON_POLL);
1299 ieee80211_run_deferred_scan(sdata->local);
1300}
1301
1302static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1303{
1304 mutex_lock(&sdata->local->mtx);
1305 __ieee80211_stop_poll(sdata);
1306 mutex_unlock(&sdata->local->mtx);
1307}
1308
7a5158ef
JB		 1309static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1310 u16 capab, bool erp_valid, u8 erp)
5628221c 1311{
bda3933a 1312 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 1313 u32 changed = 0;
7a5158ef
JB		 1314 bool use_protection;
1315 bool use_short_preamble;
1316 bool use_short_slot;
1317
1318 if (erp_valid) {
1319 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1320 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1321 } else {
1322 use_protection = false;
1323 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1324 }
1325
1326 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
55de908a 1327 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
43d35343 1328 use_short_slot = true;
5628221c 1329
471b3efd 1330 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 1331 bss_conf->use_cts_prot = use_protection;
1332 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 1333 }
7e9ed188 1334
d43c7b37 1335 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 1336 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 1337 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 1338 }
d9430a32 1339
7a5158ef 1340 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 1341 bss_conf->use_short_slot = use_short_slot;
1342 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 1343 }
1344
1345 return changed;
1346}
1347
f698d856 1348static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 1349 struct cfg80211_bss *cbss,
ae5eb026 1350 u32 bss_info_changed)
f0706e82 1351{
0c1ad2ca 1352 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 1353 struct ieee80211_local *local = sdata->local;
68542962 1354 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
d6f2da5b 1355
ae5eb026 1356 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 1357 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
50ae34a2 1358 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 1359
7ccc8bd7
FF		 1360 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1361 IEEE80211_BEACON_LOSS_COUNT * bss_conf->beacon_int));
1362
0c1ad2ca
JB		 1363 sdata->u.mgd.associated = cbss;
1364 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 1365
17e4ec14
JM		 1366 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1367
488dd7b5
JB		 1368 if (sdata->vif.p2p) {
1369 u8 noa[2];
1370 int ret;
1371
1372 ret = cfg80211_get_p2p_attr(cbss->information_elements,
1373 cbss->len_information_elements,
1374 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1375 noa, sizeof(noa));
1376 if (ret >= 2) {
1377 bss_conf->p2p_oppps = noa[1] & 0x80;
1378 bss_conf->p2p_ctwindow = noa[1] & 0x7f;
1379 bss_info_changed |= BSS_CHANGED_P2P_PS;
1380 sdata->u.mgd.p2p_noa_index = noa[0];
1381 }
1382 }
1383
b291ba11 1384 /* just to be sure */
925e64c3 1385 ieee80211_stop_poll(sdata);
b291ba11 1386
9ac19a90 1387 ieee80211_led_assoc(local, 1);
9306102e 1388
e5b900d2
JB		 1389 if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
1390 bss_conf->dtim_period = bss->dtim_period;
1391 else
1392 bss_conf->dtim_period = 0;
1393
68542962 1394 bss_conf->assoc = 1;
9cef8737 1395
a97c13c3 1396 /* Tell the driver to monitor connection quality (if supported) */
ea086359 1397 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
68542962 1398 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 1399 bss_info_changed |= BSS_CHANGED_CQM;
1400
68542962
JO		 1401 /* Enable ARP filtering */
1402 if (bss_conf->arp_filter_enabled != sdata->arp_filter_state) {
1403 bss_conf->arp_filter_enabled = sdata->arp_filter_state;
1404 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1405 }
1406
ae5eb026 1407 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 1408
056508dc
JB		 1409 mutex_lock(&local->iflist_mtx);
1410 ieee80211_recalc_ps(local, -1);
1411 mutex_unlock(&local->iflist_mtx);
e0cb686f 1412
04ecd257 1413 ieee80211_recalc_smps(sdata);
ab095877
EP		 1414 ieee80211_recalc_ps_vif(sdata);
1415
8a5b33f5 1416 netif_tx_start_all_queues(sdata->dev);
9ac19a90 1417 netif_carrier_on(sdata->dev);
f0706e82
JB		 1418}
1419
e69e95db 1420static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
37ad3888
JB		 1421 u16 stype, u16 reason, bool tx,
1422 u8 *frame_buf)
aa458d17 1423{
46900298 1424 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17
TW		 1425 struct ieee80211_local *local = sdata->local;
1426 struct sta_info *sta;
3cc5240b 1427 u32 changed = 0;
aa458d17 1428
77fdaa12
JB		 1429 ASSERT_MGD_MTX(ifmgd);
1430
37ad3888
JB		 1431 if (WARN_ON_ONCE(tx && !frame_buf))
1432 return;
1433
b291ba11
JB		 1434 if (WARN_ON(!ifmgd->associated))
1435 return;
1436
79543d8e
DS		 1437 ieee80211_stop_poll(sdata);
1438
77fdaa12 1439 ifmgd->associated = NULL;
77fdaa12
JB		 1440
1441 /*
1442 * we need to commit the associated = NULL change because the
1443 * scan code uses that to determine whether this iface should
1444 * go to/wake up from powersave or not -- and could otherwise
1445 * wake the queues erroneously.
1446 */
1447 smp_mb();
1448
1449 /*
1450 * Thus, we can only afterwards stop the queues -- to account
1451 * for the case where another CPU is finishing a scan at this
1452 * time -- we don't want the scan code to enable queues.
1453 */
aa458d17 1454
8a5b33f5 1455 netif_tx_stop_all_queues(sdata->dev);
aa458d17
TW		 1456 netif_carrier_off(sdata->dev);
1457
2a419056 1458 mutex_lock(&local->sta_mtx);
88a9e31c 1459 sta = sta_info_get(sdata, ifmgd->bssid);
4cad6c7c 1460 if (sta) {
c2c98fde 1461 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
7f161146 1462 ieee80211_sta_tear_down_BA_sessions(sta, false);
4cad6c7c 1463 }
2a419056 1464 mutex_unlock(&local->sta_mtx);
aa458d17 1465
88bc40e8
EP		 1466 /*
1467 * if we want to get out of ps before disassoc (why?) we have
1468 * to do it before sending disassoc, as otherwise the null-packet
1469 * won't be valid.
1470 */
1471 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1472 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1473 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1474 }
1475 local->ps_sdata = NULL;
1476
ab095877
EP		 1477 /* disable per-vif ps */
1478 ieee80211_recalc_ps_vif(sdata);
1479
f823981e
EP		 1480 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1481 if (tx)
1482 drv_flush(local, false);
1483
37ad3888
JB		 1484 /* deauthenticate/disassociate now */
1485 if (tx || frame_buf)
88a9e31c
EP		 1486 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
1487 reason, tx, frame_buf);
37ad3888
JB		 1488
1489 /* flush out frame */
1490 if (tx)
1491 drv_flush(local, false);
1492
88a9e31c
EP		 1493 /* clear bssid only after building the needed mgmt frames */
1494 memset(ifmgd->bssid, 0, ETH_ALEN);
1495
37ad3888
JB		 1496 /* remove AP and TDLS peers */
1497 sta_info_flush(local, sdata);
1498
1499 /* finally reset all BSS / config parameters */
f5e5bf25
TW		 1500 changed |= ieee80211_reset_erp_info(sdata);
1501
f5e5bf25 1502 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 1503 changed |= BSS_CHANGED_ASSOC;
1504 sdata->vif.bss_conf.assoc = false;
f5e5bf25 1505
488dd7b5
JB		 1506 sdata->vif.bss_conf.p2p_ctwindow = 0;
1507 sdata->vif.bss_conf.p2p_oppps = false;
1508
413ad50a 1509 /* on the next assoc, re-program HT parameters */
ef96a842
BG		 1510 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1511 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
413ad50a 1512
1ea6f9c0 1513 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
a8302de9 1514
520eb820
KV		 1515 del_timer_sync(&local->dynamic_ps_timer);
1516 cancel_work_sync(&local->dynamic_ps_enable_work);
1517
68542962
JO		 1518 /* Disable ARP filtering */
1519 if (sdata->vif.bss_conf.arp_filter_enabled) {
1520 sdata->vif.bss_conf.arp_filter_enabled = false;
1521 changed |= BSS_CHANGED_ARP_FILTER;
1522 }
1523
3abead59
JB		 1524 sdata->vif.bss_conf.qos = false;
1525 changed |= BSS_CHANGED_QOS;
1526
0aaffa9b
JB		 1527 /* The BSSID (not really interesting) and HT changed */
1528 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 1529 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 1530
55de908a 1531 ieee80211_vif_release_channel(sdata);
3cc5240b 1532
3abead59
JB		 1533 /* disassociated - set to defaults now */
1534 ieee80211_set_wmm_default(sdata, false);
1535
b9dcf712
JB		 1536 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1537 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1538 del_timer_sync(&sdata->u.mgd.timer);
1539 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2d9957cc
JB		 1540
1541 sdata->u.mgd.timers_running = 0;
aa458d17 1542}
f0706e82 1543
3cf335d5
KV		 1544void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1545 struct ieee80211_hdr *hdr)
1546{
1547 /*
1548 * We can postpone the mgd.timer whenever receiving unicast frames
1549 * from AP because we know that the connection is working both ways
1550 * at that time. But multicast frames (and hence also beacons) must
1551 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 1552 * data idle periods for sending the periodic probe request to the
1553 * AP we're connected to.
3cf335d5 1554 */
b291ba11
JB		 1555 if (is_multicast_ether_addr(hdr->addr1))
1556 return;
1557
be099e82 1558 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 1559}
f0706e82 1560
4e5ff376
FF		 1561static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1562{
1563 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
133d40f9 1564 struct ieee80211_local *local = sdata->local;
4e5ff376 1565
133d40f9 1566 mutex_lock(&local->mtx);
4e5ff376 1567 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
133d40f9
SG		 1568 IEEE80211_STA_CONNECTION_POLL))) {
1569 mutex_unlock(&local->mtx);
1570 return;
1571 }
4e5ff376 1572
925e64c3 1573 __ieee80211_stop_poll(sdata);
133d40f9
SG		 1574
1575 mutex_lock(&local->iflist_mtx);
1576 ieee80211_recalc_ps(local, -1);
1577 mutex_unlock(&local->iflist_mtx);
4e5ff376
FF		 1578
1579 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
133d40f9 1580 goto out;
4e5ff376
FF		 1581
1582 /*
1583 * We've received a probe response, but are not sure whether
1584 * we have or will be receiving any beacons or data, so let's
1585 * schedule the timers again, just in case.
1586 */
1587 ieee80211_sta_reset_beacon_monitor(sdata);
1588
1589 mod_timer(&ifmgd->conn_mon_timer,
1590 round_jiffies_up(jiffies +
1591 IEEE80211_CONNECTION_IDLE_TIME));
133d40f9 1592out:
133d40f9 1593 mutex_unlock(&local->mtx);
4e5ff376
FF		 1594}
1595
1596void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
04ac3c0e 1597 struct ieee80211_hdr *hdr, bool ack)
4e5ff376 1598{
75706d0e 1599 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF		 1600 return;
1601
04ac3c0e
FF		 1602 if (ack)
1603 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF		 1604
1605 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1606 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e
FF		 1607 if (ack)
1608 sdata->u.mgd.probe_send_count = 0;
1609 else
1610 sdata->u.mgd.nullfunc_failed = true;
4e5ff376
FF		 1611 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1612 }
1613}
1614
a43abf29
ML		 1615static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1616{
1617 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1618 const u8 *ssid;
f01a067d 1619 u8 *dst = ifmgd->associated->bssid;
180205bd 1620 u8 unicast_limit = max(1, max_probe_tries - 3);
f01a067d
LR		 1621
1622 /*
1623 * Try sending broadcast probe requests for the last three
1624 * probe requests after the first ones failed since some
1625 * buggy APs only support broadcast probe requests.
1626 */
1627 if (ifmgd->probe_send_count >= unicast_limit)
1628 dst = NULL;
a43abf29 1629
4e5ff376
FF		 1630 /*
1631 * When the hardware reports an accurate Tx ACK status, it's
1632 * better to send a nullfunc frame instead of a probe request,
1633 * as it will kick us off the AP quickly if we aren't associated
1634 * anymore. The timeout will be reset if the frame is ACKed by
1635 * the AP.
1636 */
992e68bf
SD		 1637 ifmgd->probe_send_count++;
1638
04ac3c0e
FF		 1639 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1640 ifmgd->nullfunc_failed = false;
4e5ff376 1641 ieee80211_send_nullfunc(sdata->local, sdata, 0);
04ac3c0e 1642 } else {
88c868c4
SG		 1643 int ssid_len;
1644
4e5ff376 1645 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
88c868c4
SG		 1646 if (WARN_ON_ONCE(ssid == NULL))
1647 ssid_len = 0;
1648 else
1649 ssid_len = ssid[1];
1650
1651 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
fe94fe05 1652 0, (u32) -1, true, false,
55de908a 1653 ifmgd->associated->channel, false);
4e5ff376 1654 }
a43abf29 1655
180205bd 1656 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
a43abf29 1657 run_again(ifmgd, ifmgd->probe_timeout);
f69b9c79
RM		 1658 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
1659 drv_flush(sdata->local, false);
a43abf29
ML		 1660}
1661
b291ba11
JB		 1662static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1663 bool beacon)
04de8381 1664{
04de8381 1665 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 1666 bool already = false;
34bfc411 1667
9607e6b6 1668 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 1669 return;
1670
77fdaa12
JB		 1671 mutex_lock(&ifmgd->mtx);
1672
1673 if (!ifmgd->associated)
1674 goto out;
1675
133d40f9
SG		 1676 mutex_lock(&sdata->local->mtx);
1677
1678 if (sdata->local->tmp_channel || sdata->local->scanning) {
1679 mutex_unlock(&sdata->local->mtx);
1680 goto out;
1681 }
1682
e87cc472 1683 if (beacon)
bdcbd8e0
JB		 1684 mlme_dbg_ratelimited(sdata,
1685 "detected beacon loss from AP - sending probe request\n");
1686
6efb71b0
HS		 1687 ieee80211_cqm_rssi_notify(&sdata->vif,
1688 NL80211_CQM_RSSI_BEACON_LOSS_EVENT, GFP_KERNEL);
04de8381 1689
b291ba11
JB		 1690 /*
1691 * The driver/our work has already reported this event or the
1692 * connection monitoring has kicked in and we have already sent
1693 * a probe request. Or maybe the AP died and the driver keeps
1694 * reporting until we disassociate...
1695 *
1696 * In either case we have to ignore the current call to this
1697 * function (except for setting the correct probe reason bit)
1698 * because otherwise we would reset the timer every time and
1699 * never check whether we received a probe response!
1700 */
1701 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1702 IEEE80211_STA_CONNECTION_POLL))
1703 already = true;
1704
1705 if (beacon)
1706 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1707 else
1708 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1709
133d40f9
SG		 1710 mutex_unlock(&sdata->local->mtx);
1711
b291ba11
JB		 1712 if (already)
1713 goto out;
1714
4e751843
JB		 1715 mutex_lock(&sdata->local->iflist_mtx);
1716 ieee80211_recalc_ps(sdata->local, -1);
1717 mutex_unlock(&sdata->local->iflist_mtx);
1718
a43abf29
ML		 1719 ifmgd->probe_send_count = 0;
1720 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12
JB		 1721 out:
1722 mutex_unlock(&ifmgd->mtx);
04de8381
KV		 1723}
1724
a619a4c0
JO		 1725struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
1726 struct ieee80211_vif *vif)
1727{
1728 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1729 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d9b3b28b 1730 struct cfg80211_bss *cbss;
a619a4c0
JO		 1731 struct sk_buff *skb;
1732 const u8 *ssid;
88c868c4 1733 int ssid_len;
a619a4c0
JO		 1734
1735 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1736 return NULL;
1737
1738 ASSERT_MGD_MTX(ifmgd);
1739
d9b3b28b
EP		 1740 if (ifmgd->associated)
1741 cbss = ifmgd->associated;
1742 else if (ifmgd->auth_data)
1743 cbss = ifmgd->auth_data->bss;
1744 else if (ifmgd->assoc_data)
1745 cbss = ifmgd->assoc_data->bss;
1746 else
a619a4c0
JO		 1747 return NULL;
1748
d9b3b28b 1749 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
88c868c4
SG		 1750 if (WARN_ON_ONCE(ssid == NULL))
1751 ssid_len = 0;
1752 else
1753 ssid_len = ssid[1];
1754
d9b3b28b 1755 skb = ieee80211_build_probe_req(sdata, cbss->bssid,
55de908a 1756 (u32) -1, cbss->channel,
6b77863b 1757 ssid + 2, ssid_len,
85a237fe 1758 NULL, 0, true);
a619a4c0
JO		 1759
1760 return skb;
1761}
1762EXPORT_SYMBOL(ieee80211_ap_probereq_get);
1763
882a7c69
JB		 1764static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata,
1765 bool transmit_frame)
1e4dcd01
JO		 1766{
1767 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1768 struct ieee80211_local *local = sdata->local;
6ae16775 1769 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
1e4dcd01
JO		 1770
1771 mutex_lock(&ifmgd->mtx);
1772 if (!ifmgd->associated) {
1773 mutex_unlock(&ifmgd->mtx);
1774 return;
1775 }
1776
37ad3888
JB		 1777 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
1778 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
882a7c69
JB		 1779 transmit_frame, frame_buf);
1780 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
1e4dcd01 1781 mutex_unlock(&ifmgd->mtx);
7da7cc1d 1782
1e4dcd01
JO		 1783 /*
1784 * must be outside lock due to cfg80211,
1785 * but that's not a problem.
1786 */
6ae16775 1787 cfg80211_send_deauth(sdata->dev, frame_buf, IEEE80211_DEAUTH_FRAME_LEN);
fcac4fb0
FF		 1788
1789 mutex_lock(&local->mtx);
1790 ieee80211_recalc_idle(local);
1791 mutex_unlock(&local->mtx);
1e4dcd01
JO		 1792}
1793
cc74c0c7 1794static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 1795{
1796 struct ieee80211_sub_if_data *sdata =
1797 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 1798 u.mgd.beacon_connection_loss_work);
a85e1d55
PS		 1799 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1800 struct sta_info *sta;
1801
1802 if (ifmgd->associated) {
30fa9047 1803 rcu_read_lock();
a85e1d55
PS		 1804 sta = sta_info_get(sdata, ifmgd->bssid);
1805 if (sta)
1806 sta->beacon_loss_count++;
30fa9047 1807 rcu_read_unlock();
a85e1d55 1808 }
b291ba11 1809
882a7c69
JB		 1810 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR) {
1811 sdata_info(sdata, "Connection to AP %pM lost\n",
1812 ifmgd->bssid);
1813 __ieee80211_disconnect(sdata, false);
1814 } else {
1e4dcd01 1815 ieee80211_mgd_probe_ap(sdata, true);
882a7c69
JB		 1816 }
1817}
1818
1819static void ieee80211_csa_connection_drop_work(struct work_struct *work)
1820{
1821 struct ieee80211_sub_if_data *sdata =
1822 container_of(work, struct ieee80211_sub_if_data,
1823 u.mgd.csa_connection_drop_work);
1824
1825 ieee80211_wake_queues_by_reason(&sdata->local->hw,
1826 IEEE80211_QUEUE_STOP_REASON_CSA);
1827 __ieee80211_disconnect(sdata, true);
b291ba11
JB		 1828}
1829
04de8381
KV		 1830void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1831{
1832 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 1833 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 1834
b5878a2d
JB		 1835 trace_api_beacon_loss(sdata);
1836
1e4dcd01
JO		 1837 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
1838 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 1839}
1840EXPORT_SYMBOL(ieee80211_beacon_loss);
1841
1e4dcd01
JO		 1842void ieee80211_connection_loss(struct ieee80211_vif *vif)
1843{
1844 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1845 struct ieee80211_hw *hw = &sdata->local->hw;
1846
b5878a2d
JB		 1847 trace_api_connection_loss(sdata);
1848
1e4dcd01
JO		 1849 WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR));
1850 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1851}
1852EXPORT_SYMBOL(ieee80211_connection_loss);
1853
1854
66e67e41
JB		 1855static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
1856 bool assoc)
1857{
1858 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1859
1860 lockdep_assert_held(&sdata->u.mgd.mtx);
1861
66e67e41
JB		 1862 if (!assoc) {
1863 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
1864
1865 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
1866 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
55de908a 1867 ieee80211_vif_release_channel(sdata);
66e67e41
JB		 1868 }
1869
1870 cfg80211_put_bss(auth_data->bss);
1871 kfree(auth_data);
1872 sdata->u.mgd.auth_data = NULL;
1873}
1874
1875static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1876 struct ieee80211_mgmt *mgmt, size_t len)
1877{
1878 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1879 u8 *pos;
1880 struct ieee802_11_elems elems;
1881
1882 pos = mgmt->u.auth.variable;
1883 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1884 if (!elems.challenge)
1885 return;
1886 auth_data->expected_transaction = 4;
a1845fc7 1887 drv_mgd_prepare_tx(sdata->local, sdata);
700e8ea6 1888 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
66e67e41
JB		 1889 elems.challenge - 2, elems.challenge_len + 2,
1890 auth_data->bss->bssid, auth_data->bss->bssid,
1891 auth_data->key, auth_data->key_len,
1892 auth_data->key_idx);
1893}
1894
1895static enum rx_mgmt_action __must_check
1896ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1897 struct ieee80211_mgmt *mgmt, size_t len)
1898{
1899 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1900 u8 bssid[ETH_ALEN];
1901 u16 auth_alg, auth_transaction, status_code;
1902 struct sta_info *sta;
1903
1904 lockdep_assert_held(&ifmgd->mtx);
1905
1906 if (len < 24 + 6)
1907 return RX_MGMT_NONE;
1908
1909 if (!ifmgd->auth_data || ifmgd->auth_data->done)
1910 return RX_MGMT_NONE;
1911
1912 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
1913
b203ca39 1914 if (!ether_addr_equal(bssid, mgmt->bssid))
66e67e41
JB		 1915 return RX_MGMT_NONE;
1916
1917 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1918 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1919 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1920
1921 if (auth_alg != ifmgd->auth_data->algorithm ||
0f4126e8
JM		 1922 auth_transaction != ifmgd->auth_data->expected_transaction) {
1923 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
1924 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
1925 auth_transaction,
1926 ifmgd->auth_data->expected_transaction);
66e67e41 1927 return RX_MGMT_NONE;
0f4126e8 1928 }
66e67e41
JB		 1929
1930 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 1931 sdata_info(sdata, "%pM denied authentication (status %d)\n",
1932 mgmt->sa, status_code);
dac211ec
EP		 1933 ieee80211_destroy_auth_data(sdata, false);
1934 return RX_MGMT_CFG80211_RX_AUTH;
66e67e41
JB		 1935 }
1936
1937 switch (ifmgd->auth_data->algorithm) {
1938 case WLAN_AUTH_OPEN:
1939 case WLAN_AUTH_LEAP:
1940 case WLAN_AUTH_FT:
6b8ece3a 1941 case WLAN_AUTH_SAE:
66e67e41
JB		 1942 break;
1943 case WLAN_AUTH_SHARED_KEY:
1944 if (ifmgd->auth_data->expected_transaction != 4) {
1945 ieee80211_auth_challenge(sdata, mgmt, len);
1946 /* need another frame */
1947 return RX_MGMT_NONE;
1948 }
1949 break;
1950 default:
1951 WARN_ONCE(1, "invalid auth alg %d",
1952 ifmgd->auth_data->algorithm);
1953 return RX_MGMT_NONE;
1954 }
1955
bdcbd8e0 1956 sdata_info(sdata, "authenticated\n");
66e67e41
JB		 1957 ifmgd->auth_data->done = true;
1958 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
1959 run_again(ifmgd, ifmgd->auth_data->timeout);
1960
6b8ece3a
JM		 1961 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
1962 ifmgd->auth_data->expected_transaction != 2) {
1963 /*
1964 * Report auth frame to user space for processing since another
1965 * round of Authentication frames is still needed.
1966 */
1967 return RX_MGMT_CFG80211_RX_AUTH;
1968 }
1969
66e67e41
JB		 1970 /* move station state to auth */
1971 mutex_lock(&sdata->local->sta_mtx);
1972 sta = sta_info_get(sdata, bssid);
1973 if (!sta) {
1974 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
1975 goto out_err;
1976 }
1977 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
bdcbd8e0 1978 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
66e67e41
JB		 1979 goto out_err;
1980 }
1981 mutex_unlock(&sdata->local->sta_mtx);
1982
1983 return RX_MGMT_CFG80211_RX_AUTH;
1984 out_err:
1985 mutex_unlock(&sdata->local->sta_mtx);
1986 /* ignore frame -- wait for timeout */
1987 return RX_MGMT_NONE;
1988}
1989
1990
77fdaa12
JB		 1991static enum rx_mgmt_action __must_check
1992ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
77fdaa12 1993 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 1994{
46900298 1995 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 1996 const u8 *bssid = NULL;
f0706e82
JB		 1997 u16 reason_code;
1998
66e67e41
JB		 1999 lockdep_assert_held(&ifmgd->mtx);
2000
f4ea83dd 2001 if (len < 24 + 2)
77fdaa12 2002 return RX_MGMT_NONE;
f0706e82 2003
66e67e41 2004 if (!ifmgd->associated ||
b203ca39 2005 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
66e67e41 2006 return RX_MGMT_NONE;
77fdaa12 2007
0c1ad2ca 2008 bssid = ifmgd->associated->bssid;
f0706e82
JB		 2009
2010 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2011
bdcbd8e0
JB		 2012 sdata_info(sdata, "deauthenticated from %pM (Reason: %u)\n",
2013 bssid, reason_code);
77fdaa12 2014
37ad3888
JB		 2015 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2016
7da7cc1d 2017 mutex_lock(&sdata->local->mtx);
63f170e0 2018 ieee80211_recalc_idle(sdata->local);
7da7cc1d 2019 mutex_unlock(&sdata->local->mtx);
f0706e82 2020
77fdaa12 2021 return RX_MGMT_CFG80211_DEAUTH;
f0706e82
JB		 2022}
2023
2024
77fdaa12
JB		 2025static enum rx_mgmt_action __must_check
2026ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2027 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2028{
46900298 2029 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 2030 u16 reason_code;
2031
66e67e41 2032 lockdep_assert_held(&ifmgd->mtx);
77fdaa12 2033
66e67e41 2034 if (len < 24 + 2)
77fdaa12
JB		 2035 return RX_MGMT_NONE;
2036
66e67e41 2037 if (!ifmgd->associated ||
b203ca39 2038 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
77fdaa12 2039 return RX_MGMT_NONE;
f0706e82
JB		 2040
2041 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2042
bdcbd8e0
JB		 2043 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2044 mgmt->sa, reason_code);
f0706e82 2045
37ad3888
JB		 2046 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2047
7da7cc1d 2048 mutex_lock(&sdata->local->mtx);
bc83b681 2049 ieee80211_recalc_idle(sdata->local);
7da7cc1d 2050 mutex_unlock(&sdata->local->mtx);
37ad3888 2051
77fdaa12 2052 return RX_MGMT_CFG80211_DISASSOC;
f0706e82
JB		 2053}
2054
c74d084f
CL		 2055static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2056 u8 *supp_rates, unsigned int supp_rates_len,
2057 u32 *rates, u32 *basic_rates,
2058 bool *have_higher_than_11mbit,
2059 int *min_rate, int *min_rate_index)
2060{
2061 int i, j;
2062
2063 for (i = 0; i < supp_rates_len; i++) {
2064 int rate = (supp_rates[i] & 0x7f) * 5;
2065 bool is_basic = !!(supp_rates[i] & 0x80);
2066
2067 if (rate > 110)
2068 *have_higher_than_11mbit = true;
2069
2070 /*
2071 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2072 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2073 *
2074 * Note: Even through the membership selector and the basic
2075 * rate flag share the same bit, they are not exactly
2076 * the same.
2077 */
2078 if (!!(supp_rates[i] & 0x80) &&
2079 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2080 continue;
2081
2082 for (j = 0; j < sband->n_bitrates; j++) {
2083 if (sband->bitrates[j].bitrate == rate) {
2084 *rates |= BIT(j);
2085 if (is_basic)
2086 *basic_rates |= BIT(j);
2087 if (rate < *min_rate) {
2088 *min_rate = rate;
2089 *min_rate_index = j;
2090 }
2091 break;
2092 }
2093 }
2094 }
2095}
f0706e82 2096
66e67e41
JB		 2097static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2098 bool assoc)
2099{
2100 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2101
2102 lockdep_assert_held(&sdata->u.mgd.mtx);
2103
66e67e41
JB		 2104 if (!assoc) {
2105 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2106
2107 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2108 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
55de908a 2109 ieee80211_vif_release_channel(sdata);
66e67e41
JB		 2110 }
2111
2112 kfree(assoc_data);
2113 sdata->u.mgd.assoc_data = NULL;
2114}
2115
2116static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2117 struct cfg80211_bss *cbss,
af6b6374 2118 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2119{
46900298 2120 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 2121 struct ieee80211_local *local = sdata->local;
8318d78a 2122 struct ieee80211_supported_band *sband;
f0706e82 2123 struct sta_info *sta;
af6b6374 2124 u8 *pos;
af6b6374 2125 u16 capab_info, aid;
f0706e82 2126 struct ieee802_11_elems elems;
bda3933a 2127 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
ae5eb026 2128 u32 changed = 0;
c74d084f 2129 int err;
f0706e82 2130
af6b6374 2131 /* AssocResp and ReassocResp have identical structure */
f0706e82 2132
f0706e82 2133 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 2134 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 2135
1dd84aa2 2136 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
bdcbd8e0
JB		 2137 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2138 aid);
1dd84aa2
JB		 2139 aid &= ~(BIT(15) | BIT(14));
2140
05cb9108
JB		 2141 ifmgd->broken_ap = false;
2142
2143 if (aid == 0 || aid > IEEE80211_MAX_AID) {
bdcbd8e0
JB		 2144 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2145 aid);
05cb9108
JB		 2146 aid = 0;
2147 ifmgd->broken_ap = true;
2148 }
2149
af6b6374
JB		 2150 pos = mgmt->u.assoc_resp.variable;
2151 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2152
f0706e82 2153 if (!elems.supp_rates) {
bdcbd8e0 2154 sdata_info(sdata, "no SuppRates element in AssocResp\n");
af6b6374 2155 return false;
f0706e82
JB		 2156 }
2157
46900298 2158 ifmgd->aid = aid;
f0706e82 2159
2a33bee2
GE		 2160 mutex_lock(&sdata->local->sta_mtx);
2161 /*
2162 * station info was already allocated and inserted before
2163 * the association and should be available to us
2164 */
7852e361 2165 sta = sta_info_get(sdata, cbss->bssid);
2a33bee2
GE		 2166 if (WARN_ON(!sta)) {
2167 mutex_unlock(&sdata->local->sta_mtx);
af6b6374 2168 return false;
77fdaa12 2169 }
05e5e883 2170
55de908a 2171 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
f709fc69 2172
a8243b72 2173 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
ef96a842 2174 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
d9fe60de 2175 elems.ht_cap_elem, &sta->sta.ht_cap);
ae5eb026 2176
64f68e5d
JB		 2177 sta->supports_40mhz =
2178 sta->sta.ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40;
2179
818255ea
MP		 2180 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2181 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
2182 elems.vht_cap_elem,
2183 &sta->sta.vht_cap);
2184
4b7679a5 2185 rate_control_rate_init(sta);
f0706e82 2186
46900298 2187 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
c2c98fde 2188 set_sta_flag(sta, WLAN_STA_MFP);
5394af4d 2189
ddf4ac53 2190 if (elems.wmm_param)
c2c98fde 2191 set_sta_flag(sta, WLAN_STA_WME);
ddf4ac53 2192
c8987876
JB		 2193 err = sta_info_move_state(sta, IEEE80211_STA_AUTH);
2194 if (!err)
2195 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
2196 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2197 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2198 if (err) {
bdcbd8e0
JB		 2199 sdata_info(sdata,
2200 "failed to move station %pM to desired state\n",
2201 sta->sta.addr);
c8987876
JB		 2202 WARN_ON(__sta_info_destroy(sta));
2203 mutex_unlock(&sdata->local->sta_mtx);
2204 return false;
2205 }
2206
7852e361 2207 mutex_unlock(&sdata->local->sta_mtx);
ddf4ac53 2208
f2176d72
JO		 2209 /*
2210 * Always handle WMM once after association regardless
2211 * of the first value the AP uses. Setting -1 here has
2212 * that effect because the AP values is an unsigned
2213 * 4-bit value.
2214 */
2215 ifmgd->wmm_last_param_set = -1;
2216
ddf4ac53 2217 if (elems.wmm_param)
4ced3f74 2218 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 2219 elems.wmm_param_len);
aa837e1d 2220 else
3abead59
JB		 2221 ieee80211_set_wmm_default(sdata, false);
2222 changed |= BSS_CHANGED_QOS;
f0706e82 2223
074d46d1 2224 if (elems.ht_operation && elems.wmm_param &&
a8243b72 2225 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
24398e39
JB		 2226 changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation,
2227 cbss->bssid, false);
ae5eb026 2228
60f8b39c
JB		 2229 /* set AID and assoc capability,
2230 * ieee80211_set_associated() will tell the driver */
2231 bss_conf->aid = aid;
2232 bss_conf->assoc_capability = capab_info;
0c1ad2ca 2233 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 2234
d524215f
FF		 2235 /*
2236 * If we're using 4-addr mode, let the AP know that we're
2237 * doing so, so that it can create the STA VLAN on its side
2238 */
2239 if (ifmgd->use_4addr)
2240 ieee80211_send_4addr_nullfunc(local, sdata);
2241
15b7b062 2242 /*
b291ba11
JB		 2243 * Start timer to probe the connection to the AP now.
2244 * Also start the timer that will detect beacon loss.
15b7b062 2245 */
b291ba11 2246 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 2247 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 2248
af6b6374 2249 return true;
f0706e82
JB		 2250}
2251
66e67e41
JB		 2252static enum rx_mgmt_action __must_check
2253ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2254 struct ieee80211_mgmt *mgmt, size_t len,
2255 struct cfg80211_bss **bss)
2256{
2257 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2258 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2259 u16 capab_info, status_code, aid;
2260 struct ieee802_11_elems elems;
2261 u8 *pos;
2262 bool reassoc;
2263
2264 lockdep_assert_held(&ifmgd->mtx);
2265
2266 if (!assoc_data)
2267 return RX_MGMT_NONE;
b203ca39 2268 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
66e67e41
JB		 2269 return RX_MGMT_NONE;
2270
2271 /*
2272 * AssocResp and ReassocResp have identical structure, so process both
2273 * of them in this function.
2274 */
2275
2276 if (len < 24 + 6)
2277 return RX_MGMT_NONE;
2278
2279 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2280 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2281 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2282 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2283
bdcbd8e0
JB		 2284 sdata_info(sdata,
2285 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2286 reassoc ? "Rea" : "A", mgmt->sa,
2287 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
66e67e41
JB		 2288
2289 pos = mgmt->u.assoc_resp.variable;
2290 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2291
2292 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
2293 elems.timeout_int && elems.timeout_int_len == 5 &&
2294 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
2295 u32 tu, ms;
2296 tu = get_unaligned_le32(elems.timeout_int + 1);
2297 ms = tu * 1024 / 1000;
bdcbd8e0
JB		 2298 sdata_info(sdata,
2299 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2300 mgmt->sa, tu, ms);
66e67e41
JB		 2301 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
2302 if (ms > IEEE80211_ASSOC_TIMEOUT)
2303 run_again(ifmgd, assoc_data->timeout);
2304 return RX_MGMT_NONE;
2305 }
2306
2307 *bss = assoc_data->bss;
2308
2309 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2310 sdata_info(sdata, "%pM denied association (code=%d)\n",
2311 mgmt->sa, status_code);
66e67e41
JB		 2312 ieee80211_destroy_assoc_data(sdata, false);
2313 } else {
66e67e41
JB		 2314 if (!ieee80211_assoc_success(sdata, *bss, mgmt, len)) {
2315 /* oops -- internal error -- send timeout for now */
10a9109f 2316 ieee80211_destroy_assoc_data(sdata, false);
66e67e41
JB		 2317 cfg80211_put_bss(*bss);
2318 return RX_MGMT_CFG80211_ASSOC_TIMEOUT;
2319 }
635d999f 2320 sdata_info(sdata, "associated\n");
79ebfb85
JB		 2321
2322 /*
2323 * destroy assoc_data afterwards, as otherwise an idle
2324 * recalc after assoc_data is NULL but before associated
2325 * is set can cause the interface to go idle
2326 */
2327 ieee80211_destroy_assoc_data(sdata, true);
66e67e41
JB		 2328 }
2329
2330 return RX_MGMT_CFG80211_RX_ASSOC;
2331}
98c8fccf
JB		 2332static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
2333 struct ieee80211_mgmt *mgmt,
2334 size_t len,
2335 struct ieee80211_rx_status *rx_status,
2336 struct ieee802_11_elems *elems,
2337 bool beacon)
2338{
2339 struct ieee80211_local *local = sdata->local;
2340 int freq;
c2b13452 2341 struct ieee80211_bss *bss;
98c8fccf 2342 struct ieee80211_channel *channel;
56007a02
JB		 2343 bool need_ps = false;
2344
66e67e41 2345 if (sdata->u.mgd.associated &&
b203ca39 2346 ether_addr_equal(mgmt->bssid, sdata->u.mgd.associated->bssid)) {
56007a02
JB		 2347 bss = (void *)sdata->u.mgd.associated->priv;
2348 /* not previously set so we may need to recalc */
2349 need_ps = !bss->dtim_period;
2350 }
98c8fccf
JB		 2351
2352 if (elems->ds_params && elems->ds_params_len == 1)
59eb21a6
BR		 2353 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
2354 rx_status->band);
98c8fccf
JB		 2355 else
2356 freq = rx_status->freq;
2357
2358 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2359
2360 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2361 return;
2362
98c8fccf 2363 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2a519311 2364 channel, beacon);
77fdaa12
JB		 2365 if (bss)
2366 ieee80211_rx_bss_put(local, bss);
2367
2368 if (!sdata->u.mgd.associated)
98c8fccf
JB		 2369 return;
2370
56007a02
JB		 2371 if (need_ps) {
2372 mutex_lock(&local->iflist_mtx);
2373 ieee80211_recalc_ps(local, -1);
2374 mutex_unlock(&local->iflist_mtx);
2375 }
2376
5bc1420b
JB		 2377 if (elems->ch_switch_ie &&
2378 memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid, ETH_ALEN) == 0)
2379 ieee80211_sta_process_chanswitch(sdata, elems->ch_switch_ie,
5ce6e438 2380 bss, rx_status->mactime);
f0706e82
JB		 2381}
2382
2383
f698d856 2384static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 2385 struct sk_buff *skb)
f0706e82 2386{
af6b6374 2387 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 2388 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 2389 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2390 size_t baselen, len = skb->len;
ae6a44e3
EK		 2391 struct ieee802_11_elems elems;
2392
15b7b062
KV		 2393 ifmgd = &sdata->u.mgd;
2394
77fdaa12
JB		 2395 ASSERT_MGD_MTX(ifmgd);
2396
b203ca39 2397 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
8e7cdbb6
TW		 2398 return; /* ignore ProbeResp to foreign address */
2399
ae6a44e3
EK		 2400 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2401 if (baselen > len)
2402 return;
2403
2404 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2405 &elems);
2406
98c8fccf 2407 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
9859b81e 2408
77fdaa12 2409 if (ifmgd->associated &&
b203ca39 2410 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
4e5ff376 2411 ieee80211_reset_ap_probe(sdata);
66e67e41
JB		 2412
2413 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
b203ca39 2414 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
66e67e41 2415 /* got probe response, continue with auth */
bdcbd8e0 2416 sdata_info(sdata, "direct probe responded\n");
66e67e41
JB		 2417 ifmgd->auth_data->tries = 0;
2418 ifmgd->auth_data->timeout = jiffies;
2419 run_again(ifmgd, ifmgd->auth_data->timeout);
2420 }
f0706e82
JB		 2421}
2422
d91f36db
JB		 2423/*
2424 * This is the canonical list of information elements we care about,
2425 * the filter code also gives us all changes to the Microsoft OUI
2426 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2427 *
2428 * We implement beacon filtering in software since that means we can
2429 * avoid processing the frame here and in cfg80211, and userspace
2430 * will not be able to tell whether the hardware supports it or not.
2431 *
2432 * XXX: This list needs to be dynamic -- userspace needs to be able to
2433 * add items it requires. It also needs to be able to tell us to
2434 * look out for other vendor IEs.
2435 */
2436static const u64 care_about_ies =
1d4df3a5
JB		 2437 (1ULL << WLAN_EID_COUNTRY) |
2438 (1ULL << WLAN_EID_ERP_INFO) |
2439 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2440 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2441 (1ULL << WLAN_EID_HT_CAPABILITY) |
074d46d1 2442 (1ULL << WLAN_EID_HT_OPERATION);
d91f36db 2443
f698d856 2444static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2445 struct ieee80211_mgmt *mgmt,
2446 size_t len,
2447 struct ieee80211_rx_status *rx_status)
2448{
d91f36db 2449 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 2450 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 2451 size_t baselen;
2452 struct ieee802_11_elems elems;
f698d856 2453 struct ieee80211_local *local = sdata->local;
55de908a
JB		 2454 struct ieee80211_chanctx_conf *chanctx_conf;
2455 struct ieee80211_channel *chan;
471b3efd 2456 u32 changed = 0;
f87ad637 2457 bool erp_valid;
7a5158ef 2458 u8 erp_value = 0;
d91f36db 2459 u32 ncrc;
77fdaa12
JB		 2460 u8 *bssid;
2461
66e67e41 2462 lockdep_assert_held(&ifmgd->mtx);
f0706e82 2463
ae6a44e3
EK		 2464 /* Process beacon from the current BSS */
2465 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2466 if (baselen > len)
2467 return;
2468
55de908a
JB		 2469 rcu_read_lock();
2470 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2471 if (!chanctx_conf) {
2472 rcu_read_unlock();
f0706e82 2473 return;
55de908a
JB		 2474 }
2475
2476 if (rx_status->freq != chanctx_conf->channel->center_freq) {
2477 rcu_read_unlock();
2478 return;
2479 }
2480 chan = chanctx_conf->channel;
2481 rcu_read_unlock();
f0706e82 2482
66e67e41 2483 if (ifmgd->assoc_data && !ifmgd->assoc_data->have_beacon &&
b203ca39 2484 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
66e67e41
JB		 2485 ieee802_11_parse_elems(mgmt->u.beacon.variable,
2486 len - baselen, &elems);
77fdaa12 2487
66e67e41
JB		 2488 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
2489 false);
2490 ifmgd->assoc_data->have_beacon = true;
2491 ifmgd->assoc_data->sent_assoc = false;
2492 /* continue assoc process */
2493 ifmgd->assoc_data->timeout = jiffies;
2494 run_again(ifmgd, ifmgd->assoc_data->timeout);
2495 return;
2496 }
77fdaa12 2497
66e67e41 2498 if (!ifmgd->associated ||
b203ca39 2499 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
f0706e82 2500 return;
66e67e41 2501 bssid = ifmgd->associated->bssid;
f0706e82 2502
17e4ec14
JM		 2503 /* Track average RSSI from the Beacon frames of the current AP */
2504 ifmgd->last_beacon_signal = rx_status->signal;
2505 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
2506 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3ba06c6f 2507 ifmgd->ave_beacon_signal = rx_status->signal * 16;
17e4ec14 2508 ifmgd->last_cqm_event_signal = 0;
391a200a 2509 ifmgd->count_beacon_signal = 1;
615f7b9b 2510 ifmgd->last_ave_beacon_signal = 0;
17e4ec14
JM		 2511 } else {
2512 ifmgd->ave_beacon_signal =
2513 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
2514 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
2515 ifmgd->ave_beacon_signal) / 16;
391a200a 2516 ifmgd->count_beacon_signal++;
17e4ec14 2517 }
615f7b9b
MV		 2518
2519 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
2520 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
2521 int sig = ifmgd->ave_beacon_signal;
2522 int last_sig = ifmgd->last_ave_beacon_signal;
2523
2524 /*
2525 * if signal crosses either of the boundaries, invoke callback
2526 * with appropriate parameters
2527 */
2528 if (sig > ifmgd->rssi_max_thold &&
2529 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
2530 ifmgd->last_ave_beacon_signal = sig;
2531 drv_rssi_callback(local, RSSI_EVENT_HIGH);
2532 } else if (sig < ifmgd->rssi_min_thold &&
2533 (last_sig >= ifmgd->rssi_max_thold ||
2534 last_sig == 0)) {
2535 ifmgd->last_ave_beacon_signal = sig;
2536 drv_rssi_callback(local, RSSI_EVENT_LOW);
2537 }
2538 }
2539
17e4ec14 2540 if (bss_conf->cqm_rssi_thold &&
391a200a 2541 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
ea086359 2542 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
17e4ec14
JM		 2543 int sig = ifmgd->ave_beacon_signal / 16;
2544 int last_event = ifmgd->last_cqm_event_signal;
2545 int thold = bss_conf->cqm_rssi_thold;
2546 int hyst = bss_conf->cqm_rssi_hyst;
2547 if (sig < thold &&
2548 (last_event == 0 || sig < last_event - hyst)) {
2549 ifmgd->last_cqm_event_signal = sig;
2550 ieee80211_cqm_rssi_notify(
2551 &sdata->vif,
2552 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
2553 GFP_KERNEL);
2554 } else if (sig > thold &&
2555 (last_event == 0 || sig > last_event + hyst)) {
2556 ifmgd->last_cqm_event_signal = sig;
2557 ieee80211_cqm_rssi_notify(
2558 &sdata->vif,
2559 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
2560 GFP_KERNEL);
2561 }
2562 }
2563
b291ba11 2564 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
bdcbd8e0
JB		 2565 mlme_dbg_ratelimited(sdata,
2566 "cancelling probereq poll due to a received beacon\n");
925e64c3 2567 mutex_lock(&local->mtx);
b291ba11 2568 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
925e64c3
SG		 2569 ieee80211_run_deferred_scan(local);
2570 mutex_unlock(&local->mtx);
2571
4e751843
JB		 2572 mutex_lock(&local->iflist_mtx);
2573 ieee80211_recalc_ps(local, -1);
2574 mutex_unlock(&local->iflist_mtx);
92778180
JM		 2575 }
2576
b291ba11
JB		 2577 /*
2578 * Push the beacon loss detection into the future since
2579 * we are processing a beacon from the AP just now.
2580 */
d3a910a8 2581 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 2582
d91f36db
JB		 2583 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
2584 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
2585 len - baselen, &elems,
2586 care_about_ies, ncrc);
2587
25c9c875 2588 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
f87ad637
RR		 2589 bool directed_tim = ieee80211_check_tim(elems.tim,
2590 elems.tim_len,
2591 ifmgd->aid);
1fb3606b 2592 if (directed_tim) {
572e0012 2593 if (local->hw.conf.dynamic_ps_timeout > 0) {
70b12f26
RW		 2594 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2595 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2596 ieee80211_hw_config(local,
2597 IEEE80211_CONF_CHANGE_PS);
2598 }
572e0012 2599 ieee80211_send_nullfunc(local, sdata, 0);
6f0756a3 2600 } else if (!local->pspolling && sdata->u.mgd.powersave) {
572e0012
KV		 2601 local->pspolling = true;
2602
2603 /*
2604 * Here is assumed that the driver will be
2605 * able to send ps-poll frame and receive a
2606 * response even though power save mode is
2607 * enabled, but some drivers might require
2608 * to disable power save here. This needs
2609 * to be investigated.
2610 */
2611 ieee80211_send_pspoll(local, sdata);
2612 }
a97b77b9
VN		 2613 }
2614 }
7a5158ef 2615
488dd7b5
JB		 2616 if (sdata->vif.p2p) {
2617 u8 noa[2];
2618 int ret;
2619
2620 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
2621 len - baselen,
2622 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
2623 noa, sizeof(noa));
2624 if (ret >= 2 && sdata->u.mgd.p2p_noa_index != noa[0]) {
2625 bss_conf->p2p_oppps = noa[1] & 0x80;
2626 bss_conf->p2p_ctwindow = noa[1] & 0x7f;
2627 changed |= BSS_CHANGED_P2P_PS;
2628 sdata->u.mgd.p2p_noa_index = noa[0];
2629 /*
2630 * make sure we update all information, the CRC
2631 * mechanism doesn't look at P2P attributes.
2632 */
2633 ifmgd->beacon_crc_valid = false;
2634 }
2635 }
2636
d8ec4433 2637 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
30196673
JM		 2638 return;
2639 ifmgd->beacon_crc = ncrc;
d8ec4433 2640 ifmgd->beacon_crc_valid = true;
30196673 2641
7d25745d
JB		 2642 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
2643 true);
2644
2645 if (ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2646 elems.wmm_param_len))
2647 changed |= BSS_CHANGED_QOS;
2648
7a5158ef
JB		 2649 if (elems.erp_info && elems.erp_info_len >= 1) {
2650 erp_valid = true;
2651 erp_value = elems.erp_info[0];
2652 } else {
2653 erp_valid = false;
50c4afb9 2654 }
7a5158ef
JB		 2655 changed |= ieee80211_handle_bss_capability(sdata,
2656 le16_to_cpu(mgmt->u.beacon.capab_info),
2657 erp_valid, erp_value);
f0706e82 2658
d3c990fb 2659
074d46d1 2660 if (elems.ht_cap_elem && elems.ht_operation && elems.wmm_param &&
a8243b72 2661 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
24398e39
JB		 2662 changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation,
2663 bssid, true);
d3c990fb 2664
04b7b2ff
JB		 2665 if (elems.country_elem && elems.pwr_constr_elem &&
2666 mgmt->u.probe_resp.capab_info &
2667 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT))
1ea6f9c0
JB		 2668 changed |= ieee80211_handle_pwr_constr(sdata, chan,
2669 elems.country_elem,
2670 elems.country_elem_len,
2671 elems.pwr_constr_elem);
3f2355cb 2672
471b3efd 2673 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 2674}
2675
1fa57d01
JB		 2676void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
2677 struct sk_buff *skb)
f0706e82 2678{
77fdaa12 2679 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 2680 struct ieee80211_rx_status *rx_status;
f0706e82 2681 struct ieee80211_mgmt *mgmt;
66e67e41 2682 struct cfg80211_bss *bss = NULL;
77fdaa12 2683 enum rx_mgmt_action rma = RX_MGMT_NONE;
f0706e82
JB		 2684 u16 fc;
2685
f0706e82
JB		 2686 rx_status = (struct ieee80211_rx_status *) skb->cb;
2687 mgmt = (struct ieee80211_mgmt *) skb->data;
2688 fc = le16_to_cpu(mgmt->frame_control);
2689
77fdaa12
JB		 2690 mutex_lock(&ifmgd->mtx);
2691
66e67e41
JB		 2692 switch (fc & IEEE80211_FCTL_STYPE) {
2693 case IEEE80211_STYPE_BEACON:
2694 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
2695 break;
2696 case IEEE80211_STYPE_PROBE_RESP:
2697 ieee80211_rx_mgmt_probe_resp(sdata, skb);
2698 break;
2699 case IEEE80211_STYPE_AUTH:
2700 rma = ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
2701 break;
2702 case IEEE80211_STYPE_DEAUTH:
2703 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
2704 break;
2705 case IEEE80211_STYPE_DISASSOC:
2706 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
2707 break;
2708 case IEEE80211_STYPE_ASSOC_RESP:
2709 case IEEE80211_STYPE_REASSOC_RESP:
2710 rma = ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, &bss);
2711 break;
2712 case IEEE80211_STYPE_ACTION:
2713 switch (mgmt->u.action.category) {
2714 case WLAN_CATEGORY_SPECTRUM_MGMT:
2715 ieee80211_sta_process_chanswitch(sdata,
2716 &mgmt->u.action.u.chan_switch.sw_elem,
2717 (void *)ifmgd->associated->priv,
2718 rx_status->mactime);
77fdaa12 2719 break;
77fdaa12 2720 }
77fdaa12 2721 }
77fdaa12
JB		 2722 mutex_unlock(&ifmgd->mtx);
2723
66e67e41
JB		 2724 switch (rma) {
2725 case RX_MGMT_NONE:
2726 /* no action */
2727 break;
2728 case RX_MGMT_CFG80211_DEAUTH:
ce470613 2729 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
66e67e41
JB		 2730 break;
2731 case RX_MGMT_CFG80211_DISASSOC:
2732 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
2733 break;
2734 case RX_MGMT_CFG80211_RX_AUTH:
2735 cfg80211_send_rx_auth(sdata->dev, (u8 *)mgmt, skb->len);
2736 break;
2737 case RX_MGMT_CFG80211_RX_ASSOC:
2738 cfg80211_send_rx_assoc(sdata->dev, bss, (u8 *)mgmt, skb->len);
2739 break;
2740 case RX_MGMT_CFG80211_ASSOC_TIMEOUT:
2741 cfg80211_send_assoc_timeout(sdata->dev, mgmt->bssid);
2742 break;
2743 default:
2744 WARN(1, "unexpected: %d", rma);
b054b747 2745 }
f0706e82
JB		 2746}
2747
9c6bd790 2748static void ieee80211_sta_timer(unsigned long data)
f0706e82 2749{
60f8b39c
JB		 2750 struct ieee80211_sub_if_data *sdata =
2751 (struct ieee80211_sub_if_data *) data;
46900298 2752 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
60f8b39c 2753 struct ieee80211_local *local = sdata->local;
f0706e82 2754
5bb644a0
JB		 2755 if (local->quiescing) {
2756 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2757 return;
2758 }
2759
64592c8f 2760 ieee80211_queue_work(&local->hw, &sdata->work);
f0706e82
JB		 2761}
2762
04ac3c0e 2763static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
95acac61 2764 u8 *bssid, u8 reason)
04ac3c0e
FF		 2765{
2766 struct ieee80211_local *local = sdata->local;
2767 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 2768 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
04ac3c0e 2769
37ad3888
JB		 2770 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
2771 false, frame_buf);
04ac3c0e 2772 mutex_unlock(&ifmgd->mtx);
37ad3888 2773
04ac3c0e
FF		 2774 /*
2775 * must be outside lock due to cfg80211,
2776 * but that's not a problem.
2777 */
6ae16775 2778 cfg80211_send_deauth(sdata->dev, frame_buf, IEEE80211_DEAUTH_FRAME_LEN);
fcac4fb0
FF		 2779
2780 mutex_lock(&local->mtx);
2781 ieee80211_recalc_idle(local);
2782 mutex_unlock(&local->mtx);
2783
04ac3c0e
FF		 2784 mutex_lock(&ifmgd->mtx);
2785}
2786
66e67e41
JB		 2787static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
2788{
2789 struct ieee80211_local *local = sdata->local;
2790 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2791 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
2792
2793 lockdep_assert_held(&ifmgd->mtx);
2794
2795 if (WARN_ON_ONCE(!auth_data))
2796 return -EINVAL;
2797
66e67e41
JB		 2798 auth_data->tries++;
2799
2800 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
bdcbd8e0
JB		 2801 sdata_info(sdata, "authentication with %pM timed out\n",
2802 auth_data->bss->bssid);
66e67e41
JB		 2803
2804 /*
2805 * Most likely AP is not in the range so remove the
2806 * bss struct for that AP.
2807 */
2808 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
2809
2810 return -ETIMEDOUT;
2811 }
2812
a1845fc7
JB		 2813 drv_mgd_prepare_tx(local, sdata);
2814
66e67e41 2815 if (auth_data->bss->proberesp_ies) {
6b8ece3a
JM		 2816 u16 trans = 1;
2817 u16 status = 0;
2818
bdcbd8e0
JB		 2819 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
2820 auth_data->bss->bssid, auth_data->tries,
2821 IEEE80211_AUTH_MAX_TRIES);
66e67e41
JB		 2822
2823 auth_data->expected_transaction = 2;
6b8ece3a
JM		 2824
2825 if (auth_data->algorithm == WLAN_AUTH_SAE) {
2826 trans = auth_data->sae_trans;
2827 status = auth_data->sae_status;
2828 auth_data->expected_transaction = trans;
2829 }
2830
2831 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
2832 auth_data->data, auth_data->data_len,
66e67e41
JB		 2833 auth_data->bss->bssid,
2834 auth_data->bss->bssid, NULL, 0, 0);
2835 } else {
2836 const u8 *ssidie;
2837
bdcbd8e0
JB		 2838 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
2839 auth_data->bss->bssid, auth_data->tries,
2840 IEEE80211_AUTH_MAX_TRIES);
66e67e41
JB		 2841
2842 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
2843 if (!ssidie)
2844 return -EINVAL;
2845 /*
2846 * Direct probe is sent to broadcast address as some APs
2847 * will not answer to direct packet in unassociated state.
2848 */
2849 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
fe94fe05 2850 NULL, 0, (u32) -1, true, false,
55de908a 2851 auth_data->bss->channel, false);
66e67e41
JB		 2852 }
2853
2854 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
2855 run_again(ifmgd, auth_data->timeout);
2856
2857 return 0;
2858}
2859
2860static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
2861{
2862 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2863 struct ieee80211_local *local = sdata->local;
2864
2865 lockdep_assert_held(&sdata->u.mgd.mtx);
2866
66e67e41
JB		 2867 assoc_data->tries++;
2868 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
bdcbd8e0
JB		 2869 sdata_info(sdata, "association with %pM timed out\n",
2870 assoc_data->bss->bssid);
66e67e41
JB		 2871
2872 /*
2873 * Most likely AP is not in the range so remove the
2874 * bss struct for that AP.
2875 */
2876 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
2877
2878 return -ETIMEDOUT;
2879 }
2880
bdcbd8e0
JB		 2881 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
2882 assoc_data->bss->bssid, assoc_data->tries,
2883 IEEE80211_ASSOC_MAX_TRIES);
66e67e41
JB		 2884 ieee80211_send_assoc(sdata);
2885
2886 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
2887 run_again(&sdata->u.mgd, assoc_data->timeout);
2888
2889 return 0;
2890}
2891
1fa57d01 2892void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 2893{
9c6bd790 2894 struct ieee80211_local *local = sdata->local;
1fa57d01 2895 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 2896
77fdaa12
JB		 2897 mutex_lock(&ifmgd->mtx);
2898
66e67e41
JB		 2899 if (ifmgd->auth_data &&
2900 time_after(jiffies, ifmgd->auth_data->timeout)) {
2901 if (ifmgd->auth_data->done) {
2902 /*
2903 * ok ... we waited for assoc but userspace didn't,
2904 * so let's just kill the auth data
2905 */
2906 ieee80211_destroy_auth_data(sdata, false);
2907 } else if (ieee80211_probe_auth(sdata)) {
2908 u8 bssid[ETH_ALEN];
2909
2910 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2911
2912 ieee80211_destroy_auth_data(sdata, false);
2913
2914 mutex_unlock(&ifmgd->mtx);
2915 cfg80211_send_auth_timeout(sdata->dev, bssid);
2916 mutex_lock(&ifmgd->mtx);
2917 }
2918 } else if (ifmgd->auth_data)
2919 run_again(ifmgd, ifmgd->auth_data->timeout);
2920
2921 if (ifmgd->assoc_data &&
2922 time_after(jiffies, ifmgd->assoc_data->timeout)) {
2923 if (!ifmgd->assoc_data->have_beacon ||
2924 ieee80211_do_assoc(sdata)) {
2925 u8 bssid[ETH_ALEN];
2926
2927 memcpy(bssid, ifmgd->assoc_data->bss->bssid, ETH_ALEN);
2928
2929 ieee80211_destroy_assoc_data(sdata, false);
2930
2931 mutex_unlock(&ifmgd->mtx);
2932 cfg80211_send_assoc_timeout(sdata->dev, bssid);
2933 mutex_lock(&ifmgd->mtx);
2934 }
2935 } else if (ifmgd->assoc_data)
2936 run_again(ifmgd, ifmgd->assoc_data->timeout);
2937
b291ba11
JB		 2938 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2939 IEEE80211_STA_CONNECTION_POLL) &&
2940 ifmgd->associated) {
a43abf29 2941 u8 bssid[ETH_ALEN];
72a8a3ed 2942 int max_tries;
a43abf29 2943
0c1ad2ca 2944 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 2945
72a8a3ed 2946 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
180205bd 2947 max_tries = max_nullfunc_tries;
72a8a3ed 2948 else
180205bd 2949 max_tries = max_probe_tries;
72a8a3ed 2950
4e5ff376
FF		 2951 /* ACK received for nullfunc probing frame */
2952 if (!ifmgd->probe_send_count)
2953 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 2954 else if (ifmgd->nullfunc_failed) {
2955 if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 2956 mlme_dbg(sdata,
2957 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
2958 bssid, ifmgd->probe_send_count,
2959 max_tries);
04ac3c0e
FF		 2960 ieee80211_mgd_probe_ap_send(sdata);
2961 } else {
bdcbd8e0
JB		 2962 mlme_dbg(sdata,
2963 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
2964 bssid);
95acac61
JB		 2965 ieee80211_sta_connection_lost(sdata, bssid,
2966 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
04ac3c0e
FF		 2967 }
2968 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
b291ba11 2969 run_again(ifmgd, ifmgd->probe_timeout);
04ac3c0e 2970 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
bdcbd8e0
JB		 2971 mlme_dbg(sdata,
2972 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
2973 bssid, probe_wait_ms);
95acac61
JB		 2974 ieee80211_sta_connection_lost(sdata, bssid,
2975 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
04ac3c0e 2976 } else if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 2977 mlme_dbg(sdata,
2978 "No probe response from AP %pM after %dms, try %d/%i\n",
2979 bssid, probe_wait_ms,
2980 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 2981 ieee80211_mgd_probe_ap_send(sdata);
2982 } else {
b291ba11
JB		 2983 /*
2984 * We actually lost the connection ... or did we?
2985 * Let's make sure!
2986 */
b38afa87
BG		 2987 wiphy_debug(local->hw.wiphy,
2988 "%s: No probe response from AP %pM"
2989 " after %dms, disconnecting.\n",
2990 sdata->name,
180205bd 2991 bssid, probe_wait_ms);
04ac3c0e 2992
95acac61
JB		 2993 ieee80211_sta_connection_lost(sdata, bssid,
2994 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
b291ba11
JB		 2995 }
2996 }
2997
77fdaa12 2998 mutex_unlock(&ifmgd->mtx);
66e67e41
JB		 2999
3000 mutex_lock(&local->mtx);
3001 ieee80211_recalc_idle(local);
3002 mutex_unlock(&local->mtx);
f0706e82
JB		 3003}
3004
b291ba11
JB		 3005static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3006{
3007 struct ieee80211_sub_if_data *sdata =
3008 (struct ieee80211_sub_if_data *) data;
3009 struct ieee80211_local *local = sdata->local;
3010
3011 if (local->quiescing)
3012 return;
3013
1e4dcd01
JO		 3014 ieee80211_queue_work(&sdata->local->hw,
3015 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 3016}
3017
3018static void ieee80211_sta_conn_mon_timer(unsigned long data)
3019{
3020 struct ieee80211_sub_if_data *sdata =
3021 (struct ieee80211_sub_if_data *) data;
3022 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3023 struct ieee80211_local *local = sdata->local;
3024
3025 if (local->quiescing)
3026 return;
3027
42935eca 3028 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 3029}
3030
3031static void ieee80211_sta_monitor_work(struct work_struct *work)
3032{
3033 struct ieee80211_sub_if_data *sdata =
3034 container_of(work, struct ieee80211_sub_if_data,
3035 u.mgd.monitor_work);
3036
3037 ieee80211_mgd_probe_ap(sdata, false);
3038}
3039
9c6bd790
JB		 3040static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3041{
494f1fe5
EP		 3042 u32 flags;
3043
ad935687 3044 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
925e64c3 3045 __ieee80211_stop_poll(sdata);
ad935687 3046
b291ba11 3047 /* let's probe the connection once */
494f1fe5
EP		 3048 flags = sdata->local->hw.flags;
3049 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3050 ieee80211_queue_work(&sdata->local->hw,
3051 &sdata->u.mgd.monitor_work);
b291ba11 3052 /* and do all the other regular work too */
64592c8f 3053 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 3054 }
9c6bd790 3055}
f0706e82 3056
5bb644a0
JB		 3057#ifdef CONFIG_PM
3058void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
3059{
3060 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3061
3062 /*
3063 * we need to use atomic bitops for the running bits
3064 * only because both timers might fire at the same
3065 * time -- the code here is properly synchronised.
3066 */
3067
d1f5b7a3
JB		 3068 cancel_work_sync(&ifmgd->request_smps_work);
3069
0ecfe806 3070 cancel_work_sync(&ifmgd->monitor_work);
1e4dcd01 3071 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
882a7c69 3072 cancel_work_sync(&ifmgd->csa_connection_drop_work);
5bb644a0
JB		 3073 if (del_timer_sync(&ifmgd->timer))
3074 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
3075
3076 cancel_work_sync(&ifmgd->chswitch_work);
3077 if (del_timer_sync(&ifmgd->chswitch_timer))
3078 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
b291ba11 3079
b291ba11
JB		 3080 /* these will just be re-established on connection */
3081 del_timer_sync(&ifmgd->conn_mon_timer);
3082 del_timer_sync(&ifmgd->bcn_mon_timer);
5bb644a0
JB		 3083}
3084
3085void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
3086{
3087 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3088
676b58c2
RM		 3089 if (!ifmgd->associated)
3090 return;
3091
95acac61
JB		 3092 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
3093 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
3094 mutex_lock(&ifmgd->mtx);
3095 if (ifmgd->associated) {
bdcbd8e0
JB		 3096 mlme_dbg(sdata,
3097 "driver requested disconnect after resume\n");
95acac61
JB		 3098 ieee80211_sta_connection_lost(sdata,
3099 ifmgd->associated->bssid,
3100 WLAN_REASON_UNSPECIFIED);
3101 mutex_unlock(&ifmgd->mtx);
3102 return;
3103 }
3104 mutex_unlock(&ifmgd->mtx);
3105 }
3106
5bb644a0
JB		 3107 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
3108 add_timer(&ifmgd->timer);
3109 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
3110 add_timer(&ifmgd->chswitch_timer);
c8a7972c 3111 ieee80211_sta_reset_beacon_monitor(sdata);
925e64c3
SG		 3112
3113 mutex_lock(&sdata->local->mtx);
46090979 3114 ieee80211_restart_sta_timer(sdata);
925e64c3 3115 mutex_unlock(&sdata->local->mtx);
5bb644a0
JB		 3116}
3117#endif
3118
9c6bd790
JB		 3119/* interface setup */
3120void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 3121{
46900298 3122 struct ieee80211_if_managed *ifmgd;
988c0f72 3123
46900298 3124 ifmgd = &sdata->u.mgd;
b291ba11 3125 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 3126 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 3127 INIT_WORK(&ifmgd->beacon_connection_loss_work,
3128 ieee80211_beacon_connection_loss_work);
882a7c69
JB		 3129 INIT_WORK(&ifmgd->csa_connection_drop_work,
3130 ieee80211_csa_connection_drop_work);
d1f5b7a3 3131 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
46900298 3132 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 3133 (unsigned long) sdata);
b291ba11
JB		 3134 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
3135 (unsigned long) sdata);
3136 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
3137 (unsigned long) sdata);
46900298 3138 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 3139 (unsigned long) sdata);
9c6bd790 3140
ab1faead 3141 ifmgd->flags = 0;
1478acb3 3142 ifmgd->powersave = sdata->wdev.ps;
dc41e4d4
EP		 3143 ifmgd->uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
3144 ifmgd->uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
bbbdff9e 3145
77fdaa12 3146 mutex_init(&ifmgd->mtx);
0f78231b
JB		 3147
3148 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
3149 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
3150 else
3151 ifmgd->req_smps = IEEE80211_SMPS_OFF;
f0706e82
JB		 3152}
3153
77fdaa12
JB		 3154/* scan finished notification */
3155void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 3156{
31ee67a1 3157 struct ieee80211_sub_if_data *sdata;
60f8b39c 3158
77fdaa12
JB		 3159 /* Restart STA timers */
3160 rcu_read_lock();
3161 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3162 ieee80211_restart_sta_timer(sdata);
3163 rcu_read_unlock();
3164}
60f8b39c 3165
77fdaa12
JB		 3166int ieee80211_max_network_latency(struct notifier_block *nb,
3167 unsigned long data, void *dummy)
3168{
3169 s32 latency_usec = (s32) data;
3170 struct ieee80211_local *local =
3171 container_of(nb, struct ieee80211_local,
3172 network_latency_notifier);
1fa6f4af 3173
77fdaa12
JB		 3174 mutex_lock(&local->iflist_mtx);
3175 ieee80211_recalc_ps(local, latency_usec);
3176 mutex_unlock(&local->iflist_mtx);
dfe67012 3177
77fdaa12 3178 return 0;
9c6bd790
JB		 3179}
3180
b17166a7
JB		 3181static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
3182 struct cfg80211_bss *cbss)
a1cf775d
JB		 3183{
3184 struct ieee80211_local *local = sdata->local;
3185 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
24398e39
JB		 3186 int ht_cfreq;
3187 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
3188 const u8 *ht_oper_ie;
3189 const struct ieee80211_ht_operation *ht_oper = NULL;
3190 struct ieee80211_supported_band *sband;
a1cf775d 3191
24398e39
JB		 3192 sband = local->hw.wiphy->bands[cbss->channel->band];
3193
3194 ifmgd->flags &= ~IEEE80211_STA_DISABLE_40MHZ;
3195
3196 if (sband->ht_cap.ht_supported) {
3197 ht_oper_ie = cfg80211_find_ie(WLAN_EID_HT_OPERATION,
3198 cbss->information_elements,
3199 cbss->len_information_elements);
3200 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3201 ht_oper = (void *)(ht_oper_ie + 2);
3202 }
3203
3204 if (ht_oper) {
3205 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
3206 cbss->channel->band);
3207 /* check that channel matches the right operating channel */
3208 if (cbss->channel->center_freq != ht_cfreq) {
3209 /*
3210 * It's possible that some APs are confused here;
3211 * Netgear WNDR3700 sometimes reports 4 higher than
3212 * the actual channel in association responses, but
3213 * since we look at probe response/beacon data here
3214 * it should be OK.
3215 */
bdcbd8e0
JB		 3216 sdata_info(sdata,
3217 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
3218 cbss->channel->center_freq,
3219 ht_cfreq, ht_oper->primary_chan,
3220 cbss->channel->band);
24398e39
JB		 3221 ht_oper = NULL;
3222 }
3223 }
3224
76c5fa0f 3225 if (ht_oper) {
3a40414f
JB		 3226 /*
3227 * cfg80211 already verified that the channel itself can
3228 * be used, but it didn't check that we can do the right
3229 * HT type, so do that here as well. If HT40 isn't allowed
3230 * on this channel, disable 40 MHz operation.
3231 */
04ecd257
JB		 3232 const u8 *ht_cap_ie;
3233 const struct ieee80211_ht_cap *ht_cap;
3234 u8 chains = 1;
3235
24398e39
JB		 3236 channel_type = NL80211_CHAN_HT20;
3237
76c5fa0f
JB		 3238 if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
3239 switch (ht_oper->ht_param &
3240 IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
3241 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3242 if (cbss->channel->flags &
3243 IEEE80211_CHAN_NO_HT40PLUS)
3244 ifmgd->flags |=
3245 IEEE80211_STA_DISABLE_40MHZ;
3246 else
3247 channel_type = NL80211_CHAN_HT40PLUS;
3248 break;
3249 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3250 if (cbss->channel->flags &
3251 IEEE80211_CHAN_NO_HT40MINUS)
3252 ifmgd->flags |=
3253 IEEE80211_STA_DISABLE_40MHZ;
3254 else
3255 channel_type = NL80211_CHAN_HT40MINUS;
3256 break;
3257 }
24398e39 3258 }
04ecd257
JB		 3259
3260 ht_cap_ie = cfg80211_find_ie(WLAN_EID_HT_CAPABILITY,
3261 cbss->information_elements,
3262 cbss->len_information_elements);
3263 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
3264 ht_cap = (void *)(ht_cap_ie + 2);
3265 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
3266 }
3267 sdata->needed_rx_chains = min(chains, local->rx_chains);
3268 } else {
3269 sdata->needed_rx_chains = 1;
03ae834f 3270 sdata->u.mgd.flags |= IEEE80211_STA_DISABLE_HT;
24398e39
JB		 3271 }
3272
04ecd257
JB		 3273 /* will change later if needed */
3274 sdata->smps_mode = IEEE80211_SMPS_OFF;
3275
55de908a
JB		 3276 ieee80211_vif_release_channel(sdata);
3277 return ieee80211_vif_use_channel(sdata, cbss->channel, channel_type,
3278 IEEE80211_CHANCTX_SHARED);
b17166a7
JB		 3279}
3280
3281static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
3282 struct cfg80211_bss *cbss, bool assoc)
3283{
3284 struct ieee80211_local *local = sdata->local;
3285 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3286 struct ieee80211_bss *bss = (void *)cbss->priv;
3287 struct sta_info *new_sta = NULL;
3288 bool have_sta = false;
3289 int err;
3290
3291 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3292 return -EINVAL;
3293
3294 if (assoc) {
3295 rcu_read_lock();
3296 have_sta = sta_info_get(sdata, cbss->bssid);
3297 rcu_read_unlock();
3298 }
3299
3300 if (!have_sta) {
3301 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
3302 if (!new_sta)
3303 return -ENOMEM;
3304 }
3305
3306 mutex_lock(&local->mtx);
3307 ieee80211_recalc_idle(sdata->local);
3308 mutex_unlock(&local->mtx);
3309
13e0c8e3 3310 if (new_sta) {
5d6a1b06
JB		 3311 u32 rates = 0, basic_rates = 0;
3312 bool have_higher_than_11mbit;
3313 int min_rate = INT_MAX, min_rate_index = -1;
b17166a7
JB		 3314 struct ieee80211_supported_band *sband;
3315
3316 sband = local->hw.wiphy->bands[cbss->channel->band];
3317
3318 err = ieee80211_prep_channel(sdata, cbss);
3319 if (err) {
3320 sta_info_free(local, new_sta);
3321 return err;
3322 }
5d6a1b06 3323
5d6a1b06
JB		 3324 ieee80211_get_rates(sband, bss->supp_rates,
3325 bss->supp_rates_len,
3326 &rates, &basic_rates,
3327 &have_higher_than_11mbit,
3328 &min_rate, &min_rate_index);
3329
3330 /*
3331 * This used to be a workaround for basic rates missing
3332 * in the association response frame. Now that we no
3333 * longer use the basic rates from there, it probably
3334 * doesn't happen any more, but keep the workaround so
3335 * in case some *other* APs are buggy in different ways
3336 * we can connect -- with a warning.
3337 */
3338 if (!basic_rates && min_rate_index >= 0) {
bdcbd8e0
JB		 3339 sdata_info(sdata,
3340 "No basic rates, using min rate instead\n");
5d6a1b06
JB		 3341 basic_rates = BIT(min_rate_index);
3342 }
3343
13e0c8e3 3344 new_sta->sta.supp_rates[cbss->channel->band] = rates;
5d6a1b06
JB		 3345 sdata->vif.bss_conf.basic_rates = basic_rates;
3346
3347 /* cf. IEEE 802.11 9.2.12 */
55de908a 3348 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
5d6a1b06
JB		 3349 have_higher_than_11mbit)
3350 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3351 else
3352 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
3353
3354 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
3355
8c358bcd
JB		 3356 /* set timing information */
3357 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
3358 sdata->vif.bss_conf.sync_tsf = cbss->tsf;
3359 sdata->vif.bss_conf.sync_device_ts = bss->device_ts;
3360
3361 /* tell driver about BSSID, basic rates and timing */
5d6a1b06 3362 ieee80211_bss_info_change_notify(sdata,
8c358bcd
JB		 3363 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
3364 BSS_CHANGED_BEACON_INT);
a1cf775d
JB		 3365
3366 if (assoc)
13e0c8e3 3367 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
a1cf775d 3368
13e0c8e3
JB		 3369 err = sta_info_insert(new_sta);
3370 new_sta = NULL;
a1cf775d 3371 if (err) {
bdcbd8e0
JB		 3372 sdata_info(sdata,
3373 "failed to insert STA entry for the AP (error %d)\n",
3374 err);
a1cf775d
JB		 3375 return err;
3376 }
3377 } else
b203ca39 3378 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
a1cf775d
JB		 3379
3380 return 0;
3381}
3382
77fdaa12
JB		 3383/* config hooks */
3384int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
3385 struct cfg80211_auth_request *req)
9c6bd790 3386{
66e67e41
JB		 3387 struct ieee80211_local *local = sdata->local;
3388 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3389 struct ieee80211_mgd_auth_data *auth_data;
77fdaa12 3390 u16 auth_alg;
66e67e41
JB		 3391 int err;
3392
3393 /* prepare auth data structure */
9c6bd790 3394
77fdaa12
JB		 3395 switch (req->auth_type) {
3396 case NL80211_AUTHTYPE_OPEN_SYSTEM:
3397 auth_alg = WLAN_AUTH_OPEN;
3398 break;
3399 case NL80211_AUTHTYPE_SHARED_KEY:
66e67e41 3400 if (IS_ERR(local->wep_tx_tfm))
9dca9c49 3401 return -EOPNOTSUPP;
77fdaa12
JB		 3402 auth_alg = WLAN_AUTH_SHARED_KEY;
3403 break;
3404 case NL80211_AUTHTYPE_FT:
3405 auth_alg = WLAN_AUTH_FT;
3406 break;
3407 case NL80211_AUTHTYPE_NETWORK_EAP:
3408 auth_alg = WLAN_AUTH_LEAP;
3409 break;
6b8ece3a
JM		 3410 case NL80211_AUTHTYPE_SAE:
3411 auth_alg = WLAN_AUTH_SAE;
3412 break;
77fdaa12
JB		 3413 default:
3414 return -EOPNOTSUPP;
60f8b39c 3415 }
77fdaa12 3416
6b8ece3a
JM		 3417 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
3418 req->ie_len, GFP_KERNEL);
66e67e41 3419 if (!auth_data)
9c6bd790 3420 return -ENOMEM;
77fdaa12 3421
66e67e41 3422 auth_data->bss = req->bss;
77fdaa12 3423
6b8ece3a
JM		 3424 if (req->sae_data_len >= 4) {
3425 __le16 *pos = (__le16 *) req->sae_data;
3426 auth_data->sae_trans = le16_to_cpu(pos[0]);
3427 auth_data->sae_status = le16_to_cpu(pos[1]);
3428 memcpy(auth_data->data, req->sae_data + 4,
3429 req->sae_data_len - 4);
3430 auth_data->data_len += req->sae_data_len - 4;
3431 }
3432
77fdaa12 3433 if (req->ie && req->ie_len) {
6b8ece3a
JM		 3434 memcpy(&auth_data->data[auth_data->data_len],
3435 req->ie, req->ie_len);
3436 auth_data->data_len += req->ie_len;
9c6bd790 3437 }
77fdaa12 3438
fffd0934 3439 if (req->key && req->key_len) {
66e67e41
JB		 3440 auth_data->key_len = req->key_len;
3441 auth_data->key_idx = req->key_idx;
3442 memcpy(auth_data->key, req->key, req->key_len);
fffd0934
JB		 3443 }
3444
66e67e41 3445 auth_data->algorithm = auth_alg;
60f8b39c 3446
66e67e41 3447 /* try to authenticate/probe */
2a33bee2 3448
66e67e41 3449 mutex_lock(&ifmgd->mtx);
2a33bee2 3450
66e67e41
JB		 3451 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
3452 ifmgd->assoc_data) {
3453 err = -EBUSY;
3454 goto err_free;
2a33bee2
GE		 3455 }
3456
66e67e41
JB		 3457 if (ifmgd->auth_data)
3458 ieee80211_destroy_auth_data(sdata, false);
2a33bee2 3459
66e67e41
JB		 3460 /* prep auth_data so we don't go into idle on disassoc */
3461 ifmgd->auth_data = auth_data;
af6b6374 3462
66e67e41 3463 if (ifmgd->associated)
37ad3888 3464 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
af6b6374 3465
bdcbd8e0 3466 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
e5b900d2 3467
a1cf775d
JB		 3468 err = ieee80211_prep_connection(sdata, req->bss, false);
3469 if (err)
66e67e41 3470 goto err_clear;
af6b6374 3471
66e67e41
JB		 3472 err = ieee80211_probe_auth(sdata);
3473 if (err) {
66e67e41
JB		 3474 sta_info_destroy_addr(sdata, req->bss->bssid);
3475 goto err_clear;
3476 }
3477
3478 /* hold our own reference */
3479 cfg80211_ref_bss(auth_data->bss);
3480 err = 0;
3481 goto out_unlock;
3482
3483 err_clear:
3d2abdfd
EP		 3484 memset(ifmgd->bssid, 0, ETH_ALEN);
3485 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 3486 ifmgd->auth_data = NULL;
3487 err_free:
3488 kfree(auth_data);
3489 out_unlock:
3490 mutex_unlock(&ifmgd->mtx);
b2abb6e2 3491
66e67e41 3492 return err;
af6b6374
JB		 3493}
3494
77fdaa12
JB		 3495int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
3496 struct cfg80211_assoc_request *req)
f0706e82 3497{
66e67e41 3498 struct ieee80211_local *local = sdata->local;
77fdaa12 3499 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 3500 struct ieee80211_bss *bss = (void *)req->bss->priv;
66e67e41 3501 struct ieee80211_mgd_assoc_data *assoc_data;
4e74bfdb 3502 struct ieee80211_supported_band *sband;
9dde6423 3503 const u8 *ssidie, *ht_ie;
2a33bee2 3504 int i, err;
f0706e82 3505
66e67e41
JB		 3506 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
3507 if (!ssidie)
3508 return -EINVAL;
3509
3510 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
3511 if (!assoc_data)
3512 return -ENOMEM;
3513
77fdaa12 3514 mutex_lock(&ifmgd->mtx);
9c87ba67 3515
66e67e41 3516 if (ifmgd->associated)
37ad3888 3517 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
66e67e41
JB		 3518
3519 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
3520 err = -EBUSY;
3521 goto err_free;
af6b6374 3522 }
77fdaa12 3523
66e67e41
JB		 3524 if (ifmgd->assoc_data) {
3525 err = -EBUSY;
3526 goto err_free;
3527 }
77fdaa12 3528
66e67e41
JB		 3529 if (ifmgd->auth_data) {
3530 bool match;
3531
3532 /* keep sta info, bssid if matching */
b203ca39 3533 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
66e67e41 3534 ieee80211_destroy_auth_data(sdata, match);
2a33bee2
GE		 3535 }
3536
66e67e41 3537 /* prepare assoc data */
19c3b830
JB		 3538
3539 /*
3540 * keep only the 40 MHz disable bit set as it might have
3541 * been set during authentication already, all other bits
3542 * should be reset for a new connection
3543 */
3544 ifmgd->flags &= IEEE80211_STA_DISABLE_40MHZ;
77fdaa12 3545
d8ec4433
JO		 3546 ifmgd->beacon_crc_valid = false;
3547
de5036aa
JB		 3548 /*
3549 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
3550 * We still associate in non-HT mode (11a/b/g) if any one of these
3551 * ciphers is configured as pairwise.
3552 * We can set this to true for non-11n hardware, that'll be checked
3553 * separately along with the peer capabilities.
3554 */
1c4cb928 3555 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
77fdaa12
JB		 3556 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
3557 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
1c4cb928 3558 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
a8243b72 3559 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
d545daba 3560 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
1c4cb928 3561 netdev_info(sdata->dev,
d545daba 3562 "disabling HT/VHT due to WEP/TKIP use\n");
1c4cb928
JB		 3563 }
3564 }
77fdaa12 3565
d545daba 3566 if (req->flags & ASSOC_REQ_DISABLE_HT) {
a8243b72 3567 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
d545daba
MP		 3568 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3569 }
ef96a842 3570
4e74bfdb
JB		 3571 /* Also disable HT if we don't support it or the AP doesn't use WMM */
3572 sband = local->hw.wiphy->bands[req->bss->channel->band];
3573 if (!sband->ht_cap.ht_supported ||
1c4cb928 3574 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
a8243b72 3575 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
1b49de26
JB		 3576 if (!bss->wmm_used)
3577 netdev_info(sdata->dev,
3578 "disabling HT as WMM/QoS is not supported by the AP\n");
1c4cb928 3579 }
4e74bfdb 3580
d545daba
MP		 3581 /* disable VHT if we don't support it or the AP doesn't use WMM */
3582 if (!sband->vht_cap.vht_supported ||
3583 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
3584 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
1b49de26
JB		 3585 if (!bss->wmm_used)
3586 netdev_info(sdata->dev,
3587 "disabling VHT as WMM/QoS is not supported by the AP\n");
d545daba
MP		 3588 }
3589
ef96a842
BG		 3590 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
3591 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
3592 sizeof(ifmgd->ht_capa_mask));
3593
77fdaa12 3594 if (req->ie && req->ie_len) {
66e67e41
JB		 3595 memcpy(assoc_data->ie, req->ie, req->ie_len);
3596 assoc_data->ie_len = req->ie_len;
3597 }
f679f65d 3598
66e67e41 3599 assoc_data->bss = req->bss;
f679f65d 3600
af6b6374
JB		 3601 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
3602 if (ifmgd->powersave)
04ecd257 3603 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
af6b6374 3604 else
04ecd257 3605 sdata->smps_mode = IEEE80211_SMPS_OFF;
af6b6374 3606 } else
04ecd257 3607 sdata->smps_mode = ifmgd->req_smps;
af6b6374 3608
66e67e41 3609 assoc_data->capability = req->bss->capability;
32c5057b
JB		 3610 assoc_data->wmm = bss->wmm_used &&
3611 (local->hw.queues >= IEEE80211_NUM_ACS);
66e67e41
JB		 3612 assoc_data->supp_rates = bss->supp_rates;
3613 assoc_data->supp_rates_len = bss->supp_rates_len;
9dde6423
JB		 3614
3615 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
3616 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
3617 assoc_data->ap_ht_param =
3618 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
3619 else
a8243b72 3620 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
63f170e0 3621
ab13315a
KV		 3622 if (bss->wmm_used && bss->uapsd_supported &&
3623 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
76f0303d 3624 assoc_data->uapsd = true;
ab13315a
KV		 3625 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
3626 } else {
76f0303d 3627 assoc_data->uapsd = false;
ab13315a
KV		 3628 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
3629 }
3630
66e67e41
JB		 3631 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
3632 assoc_data->ssid_len = ssidie[1];
63f170e0 3633
77fdaa12 3634 if (req->prev_bssid)
66e67e41 3635 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12
JB		 3636
3637 if (req->use_mfp) {
3638 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
3639 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
3640 } else {
3641 ifmgd->mfp = IEEE80211_MFP_DISABLED;
3642 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
3643 }
3644
3645 if (req->crypto.control_port)
3646 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
3647 else
3648 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
3649
a621fa4d
JB		 3650 sdata->control_port_protocol = req->crypto.control_port_ethertype;
3651 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
3652
66e67e41
JB		 3653 /* kick off associate process */
3654
3655 ifmgd->assoc_data = assoc_data;
3656
a1cf775d
JB		 3657 err = ieee80211_prep_connection(sdata, req->bss, true);
3658 if (err)
3659 goto err_clear;
66e67e41
JB		 3660
3661 if (!bss->dtim_period &&
3662 sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD) {
3663 /*
3664 * Wait up to one beacon interval ...
3665 * should this be more if we miss one?
3666 */
bdcbd8e0
JB		 3667 sdata_info(sdata, "waiting for beacon from %pM\n",
3668 ifmgd->bssid);
3f9768a5 3669 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
66e67e41
JB		 3670 } else {
3671 assoc_data->have_beacon = true;
3672 assoc_data->sent_assoc = false;
3673 assoc_data->timeout = jiffies;
3674 }
3675 run_again(ifmgd, assoc_data->timeout);
3676
fcff4f10
PS		 3677 if (bss->corrupt_data) {
3678 char *corrupt_type = "data";
3679 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
3680 if (bss->corrupt_data &
3681 IEEE80211_BSS_CORRUPT_PROBE_RESP)
3682 corrupt_type = "beacon and probe response";
3683 else
3684 corrupt_type = "beacon";
3685 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
3686 corrupt_type = "probe response";
bdcbd8e0
JB		 3687 sdata_info(sdata, "associating with AP with corrupt %s\n",
3688 corrupt_type);
fcff4f10
PS		 3689 }
3690
66e67e41
JB		 3691 err = 0;
3692 goto out;
3693 err_clear:
3d2abdfd
EP		 3694 memset(ifmgd->bssid, 0, ETH_ALEN);
3695 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 3696 ifmgd->assoc_data = NULL;
3697 err_free:
3698 kfree(assoc_data);
3699 out:
3700 mutex_unlock(&ifmgd->mtx);
3701
3702 return err;
f0706e82
JB		 3703}
3704
77fdaa12 3705int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
63c9c5e7 3706 struct cfg80211_deauth_request *req)
f0706e82 3707{
46900298 3708 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 3709 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
6863255b 3710 bool tx = !req->local_state_change;
86552017 3711 bool sent_frame = false;
f0706e82 3712
77fdaa12
JB		 3713 mutex_lock(&ifmgd->mtx);
3714
bdcbd8e0
JB		 3715 sdata_info(sdata,
3716 "deauthenticating from %pM by local choice (reason=%d)\n",
3717 req->bssid, req->reason_code);
0ff71613 3718
86552017 3719 if (ifmgd->auth_data) {
8c7d857c 3720 drv_mgd_prepare_tx(sdata->local, sdata);
37ad3888
JB		 3721 ieee80211_send_deauth_disassoc(sdata, req->bssid,
3722 IEEE80211_STYPE_DEAUTH,
6863255b 3723 req->reason_code, tx,
37ad3888 3724 frame_buf);
86552017
JB		 3725 ieee80211_destroy_auth_data(sdata, false);
3726 mutex_unlock(&ifmgd->mtx);
3727
3728 sent_frame = tx;
3729 goto out;
8c7d857c
EG		 3730 }
3731
86552017
JB		 3732 if (ifmgd->associated &&
3733 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
3734 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3735 req->reason_code, tx, frame_buf);
3736 sent_frame = tx;
3737 }
37ad3888
JB		 3738 mutex_unlock(&ifmgd->mtx);
3739
86552017 3740 out:
7da7cc1d 3741 mutex_lock(&sdata->local->mtx);
bc83b681 3742 ieee80211_recalc_idle(sdata->local);
7da7cc1d 3743 mutex_unlock(&sdata->local->mtx);
bc83b681 3744
86552017
JB		 3745 if (sent_frame)
3746 __cfg80211_send_deauth(sdata->dev, frame_buf,
3747 IEEE80211_DEAUTH_FRAME_LEN);
3748
f0706e82
JB		 3749 return 0;
3750}
84363e6e 3751
77fdaa12 3752int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 3753 struct cfg80211_disassoc_request *req)
9c6bd790 3754{
77fdaa12 3755 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 3756 u8 bssid[ETH_ALEN];
6ae16775 3757 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
9c6bd790 3758
77fdaa12 3759 mutex_lock(&ifmgd->mtx);
10f644a4 3760
8d8b261a
JB		 3761 /*
3762 * cfg80211 should catch this ... but it's racy since
3763 * we can receive a disassoc frame, process it, hand it
3764 * to cfg80211 while that's in a locked section already
3765 * trying to tell us that the user wants to disconnect.
3766 */
0c1ad2ca 3767 if (ifmgd->associated != req->bss) {
77fdaa12
JB		 3768 mutex_unlock(&ifmgd->mtx);
3769 return -ENOLINK;
3770 }
3771
bdcbd8e0
JB		 3772 sdata_info(sdata,
3773 "disassociating from %pM by local choice (reason=%d)\n",
3774 req->bss->bssid, req->reason_code);
0ff71613 3775
e69e95db 3776 memcpy(bssid, req->bss->bssid, ETH_ALEN);
37ad3888
JB		 3777 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
3778 req->reason_code, !req->local_state_change,
3779 frame_buf);
77fdaa12 3780 mutex_unlock(&ifmgd->mtx);
10f644a4 3781
6ae16775
AQ		 3782 __cfg80211_send_disassoc(sdata->dev, frame_buf,
3783 IEEE80211_DEAUTH_FRAME_LEN);
bc83b681 3784
7da7cc1d 3785 mutex_lock(&sdata->local->mtx);
bc83b681 3786 ieee80211_recalc_idle(sdata->local);
7da7cc1d 3787 mutex_unlock(&sdata->local->mtx);
bc83b681 3788
10f644a4
JB		 3789 return 0;
3790}
026331c4 3791
afa762f6 3792void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
54e4ffb2
JB		 3793{
3794 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3795
3796 mutex_lock(&ifmgd->mtx);
3797 if (ifmgd->assoc_data)
3798 ieee80211_destroy_assoc_data(sdata, false);
3799 if (ifmgd->auth_data)
3800 ieee80211_destroy_auth_data(sdata, false);
3801 del_timer_sync(&ifmgd->timer);
3802 mutex_unlock(&ifmgd->mtx);
3803}
3804
a97c13c3
JO		 3805void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
3806 enum nl80211_cqm_rssi_threshold_event rssi_event,
3807 gfp_t gfp)
3808{
3809 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3810
b5878a2d
JB		 3811 trace_api_cqm_rssi_notify(sdata, rssi_event);
3812
a97c13c3
JO		 3813 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
3814}
3815EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
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