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mac80211: rcu-ify scan and scheduled scan request pointers
[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>
d98ad83e 8 * Copyright 2013-2014 Intel Mobile Communications GmbH
f0706e82
JB		 9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
13 */
14
5b323edb 15#include <linux/delay.h>
f0706e82
JB		 16#include <linux/if_ether.h>
17#include <linux/skbuff.h>
f0706e82 18#include <linux/if_arp.h>
f0706e82 19#include <linux/etherdevice.h>
d9b93842 20#include <linux/moduleparam.h>
d0709a65 21#include <linux/rtnetlink.h>
e8db0be1 22#include <linux/pm_qos.h>
d91f36db 23#include <linux/crc32.h>
5a0e3ad6 24#include <linux/slab.h>
bc3b2d7f 25#include <linux/export.h>
f0706e82 26#include <net/mac80211.h>
472dbc45 27#include <asm/unaligned.h>
60f8b39c 28
f0706e82 29#include "ieee80211_i.h"
24487981 30#include "driver-ops.h"
2c8dccc7
JB		 31#include "rate.h"
32#include "led.h"
f0706e82 33
1672c0e3 34#define IEEE80211_AUTH_TIMEOUT (HZ / 5)
cb236d2d 35#define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2)
1672c0e3
JB		 36#define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10)
37#define IEEE80211_AUTH_MAX_TRIES 3
38#define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
39#define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
cb236d2d 40#define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2)
1672c0e3
JB		 41#define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10)
42#define IEEE80211_ASSOC_MAX_TRIES 3
66e67e41 43
180205bd
BG		 44static int max_nullfunc_tries = 2;
45module_param(max_nullfunc_tries, int, 0644);
46MODULE_PARM_DESC(max_nullfunc_tries,
47 "Maximum nullfunc tx tries before disconnecting (reason 4).");
48
49static int max_probe_tries = 5;
50module_param(max_probe_tries, int, 0644);
51MODULE_PARM_DESC(max_probe_tries,
52 "Maximum probe tries before disconnecting (reason 4).");
b291ba11
JB		 53
54/*
7ccc8bd7
FF		 55 * Beacon loss timeout is calculated as N frames times the
56 * advertised beacon interval. This may need to be somewhat
57 * higher than what hardware might detect to account for
58 * delays in the host processing frames. But since we also
59 * probe on beacon miss before declaring the connection lost
60 * default to what we want.
b291ba11 61 */
59c1ec2b
BG		 62static int beacon_loss_count = 7;
63module_param(beacon_loss_count, int, 0644);
64MODULE_PARM_DESC(beacon_loss_count,
65 "Number of beacon intervals before we decide beacon was lost.");
7ccc8bd7 66
b291ba11
JB		 67/*
68 * Time the connection can be idle before we probe
69 * it to see if we can still talk to the AP.
70 */
d1c5091f 71#define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
b291ba11
JB		 72/*
73 * Time we wait for a probe response after sending
74 * a probe request because of beacon loss or for
75 * checking the connection still works.
76 */
180205bd
BG		 77static int probe_wait_ms = 500;
78module_param(probe_wait_ms, int, 0644);
79MODULE_PARM_DESC(probe_wait_ms,
80 "Maximum time(ms) to wait for probe response"
81 " before disconnecting (reason 4).");
f0706e82 82
17e4ec14
JM		 83/*
84 * Weight given to the latest Beacon frame when calculating average signal
85 * strength for Beacon frames received in the current BSS. This must be
86 * between 1 and 15.
87 */
88#define IEEE80211_SIGNAL_AVE_WEIGHT 3
89
391a200a
JM		 90/*
91 * How many Beacon frames need to have been used in average signal strength
92 * before starting to indicate signal change events.
93 */
94#define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
95
ca386f31
JB		 96/*
97 * We can have multiple work items (and connection probing)
98 * scheduling this timer, but we need to take care to only
99 * reschedule it when it should fire _earlier_ than it was
100 * asked for before, or if it's not pending right now. This
101 * function ensures that. Note that it then is required to
102 * run this function for all timeouts after the first one
103 * has happened -- the work that runs from this timer will
104 * do that.
105 */
8d61ffa5
JB		 106static void run_again(struct ieee80211_sub_if_data *sdata,
107 unsigned long timeout)
ca386f31 108{
8d61ffa5 109 sdata_assert_lock(sdata);
ca386f31 110
8d61ffa5
JB		 111 if (!timer_pending(&sdata->u.mgd.timer) ||
112 time_before(timeout, sdata->u.mgd.timer.expires))
113 mod_timer(&sdata->u.mgd.timer, timeout);
ca386f31
JB		 114}
115
d3a910a8 116void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
b291ba11 117{
c1288b12 118 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
b291ba11
JB		 119 return;
120
7eeff74c
JB		 121 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
122 return;
123
b291ba11 124 mod_timer(&sdata->u.mgd.bcn_mon_timer,
7ccc8bd7 125 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
b291ba11
JB		 126}
127
be099e82
LR		 128void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
129{
0c699c3a
LR		 130 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
131
8628172f
SG		 132 if (unlikely(!sdata->u.mgd.associated))
133 return;
134
448cd2e2
EP		 135 ifmgd->probe_send_count = 0;
136
be099e82
LR		 137 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
138 return;
139
140 mod_timer(&sdata->u.mgd.conn_mon_timer,
141 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
142}
143
5484e237 144static int ecw2cw(int ecw)
60f8b39c 145{
5484e237 146 return (1 << ecw) - 1;
60f8b39c
JB		 147}
148
6565ec9b
JB		 149static u32
150ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
151 struct ieee80211_supported_band *sband,
152 struct ieee80211_channel *channel,
53b954ee 153 const struct ieee80211_ht_cap *ht_cap,
6565ec9b
JB		 154 const struct ieee80211_ht_operation *ht_oper,
155 const struct ieee80211_vht_operation *vht_oper,
5cdaed1e 156 struct cfg80211_chan_def *chandef, bool tracking)
6565ec9b 157{
5cdaed1e 158 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6565ec9b
JB		 159 struct cfg80211_chan_def vht_chandef;
160 u32 ht_cfreq, ret;
161
162 chandef->chan = channel;
163 chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
164 chandef->center_freq1 = channel->center_freq;
165 chandef->center_freq2 = 0;
166
53b954ee 167 if (!ht_cap || !ht_oper || !sband->ht_cap.ht_supported) {
6565ec9b
JB		 168 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
169 goto out;
170 }
171
172 chandef->width = NL80211_CHAN_WIDTH_20;
173
53b954ee
EP		 174 if (!(ht_cap->cap_info &
175 cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40))) {
f3000e1b 176 ret = IEEE80211_STA_DISABLE_40MHZ;
53b954ee
EP		 177 goto out;
178 }
179
6565ec9b
JB		 180 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
181 channel->band);
182 /* check that channel matches the right operating channel */
5cdaed1e 183 if (!tracking && channel->center_freq != ht_cfreq) {
6565ec9b
JB		 184 /*
185 * It's possible that some APs are confused here;
186 * Netgear WNDR3700 sometimes reports 4 higher than
187 * the actual channel in association responses, but
188 * since we look at probe response/beacon data here
189 * it should be OK.
190 */
5cdaed1e
JB		 191 sdata_info(sdata,
192 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
193 channel->center_freq, ht_cfreq,
194 ht_oper->primary_chan, channel->band);
6565ec9b
JB		 195 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
196 goto out;
197 }
198
199 /* check 40 MHz support, if we have it */
200 if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
201 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
202 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
203 chandef->width = NL80211_CHAN_WIDTH_40;
204 chandef->center_freq1 += 10;
205 break;
206 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
207 chandef->width = NL80211_CHAN_WIDTH_40;
208 chandef->center_freq1 -= 10;
209 break;
210 }
211 } else {
212 /* 40 MHz (and 80 MHz) must be supported for VHT */
213 ret = IEEE80211_STA_DISABLE_VHT;
85220d71
JB		 214 /* also mark 40 MHz disabled */
215 ret |= IEEE80211_STA_DISABLE_40MHZ;
6565ec9b
JB		 216 goto out;
217 }
218
219 if (!vht_oper || !sband->vht_cap.vht_supported) {
220 ret = IEEE80211_STA_DISABLE_VHT;
221 goto out;
222 }
223
224 vht_chandef.chan = channel;
225 vht_chandef.center_freq1 =
226 ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx,
227 channel->band);
228 vht_chandef.center_freq2 = 0;
229
6565ec9b
JB		 230 switch (vht_oper->chan_width) {
231 case IEEE80211_VHT_CHANWIDTH_USE_HT:
232 vht_chandef.width = chandef->width;
cb664981 233 vht_chandef.center_freq1 = chandef->center_freq1;
6565ec9b
JB		 234 break;
235 case IEEE80211_VHT_CHANWIDTH_80MHZ:
236 vht_chandef.width = NL80211_CHAN_WIDTH_80;
237 break;
238 case IEEE80211_VHT_CHANWIDTH_160MHZ:
239 vht_chandef.width = NL80211_CHAN_WIDTH_160;
240 break;
241 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
242 vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
6553bf04
JB		 243 vht_chandef.center_freq2 =
244 ieee80211_channel_to_frequency(
245 vht_oper->center_freq_seg2_idx,
246 channel->band);
6565ec9b
JB		 247 break;
248 default:
5cdaed1e 249 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
30eb1dc2
JB		 250 sdata_info(sdata,
251 "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
252 vht_oper->chan_width);
6565ec9b
JB		 253 ret = IEEE80211_STA_DISABLE_VHT;
254 goto out;
255 }
256
257 if (!cfg80211_chandef_valid(&vht_chandef)) {
5cdaed1e 258 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
30eb1dc2
JB		 259 sdata_info(sdata,
260 "AP VHT information is invalid, disable VHT\n");
6565ec9b
JB		 261 ret = IEEE80211_STA_DISABLE_VHT;
262 goto out;
263 }
264
265 if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
266 ret = 0;
267 goto out;
268 }
269
270 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
5cdaed1e 271 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
30eb1dc2
JB		 272 sdata_info(sdata,
273 "AP VHT information doesn't match HT, disable VHT\n");
6565ec9b
JB		 274 ret = IEEE80211_STA_DISABLE_VHT;
275 goto out;
276 }
277
278 *chandef = vht_chandef;
279
280 ret = 0;
281
282out:
963a1852
JB		 283 /*
284 * When tracking the current AP, don't do any further checks if the
285 * new chandef is identical to the one we're currently using for the
286 * connection. This keeps us from playing ping-pong with regulatory,
287 * without it the following can happen (for example):
288 * - connect to an AP with 80 MHz, world regdom allows 80 MHz
289 * - AP advertises regdom US
290 * - CRDA loads regdom US with 80 MHz prohibited (old database)
291 * - the code below detects an unsupported channel, downgrades, and
292 * we disconnect from the AP in the caller
293 * - disconnect causes CRDA to reload world regdomain and the game
294 * starts anew.
295 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
296 *
297 * It seems possible that there are still scenarios with CSA or real
298 * bandwidth changes where a this could happen, but those cases are
299 * less common and wouldn't completely prevent using the AP.
300 */
301 if (tracking &&
302 cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef))
303 return ret;
304
586e01ed
JB		 305 /* don't print the message below for VHT mismatch if VHT is disabled */
306 if (ret & IEEE80211_STA_DISABLE_VHT)
307 vht_chandef = *chandef;
308
ddfe49b4
JB		 309 /*
310 * Ignore the DISABLED flag when we're already connected and only
311 * tracking the APs beacon for bandwidth changes - otherwise we
312 * might get disconnected here if we connect to an AP, update our
313 * regulatory information based on the AP's country IE and the
314 * information we have is wrong/outdated and disables the channel
315 * that we're actually using for the connection to the AP.
316 */
6565ec9b 317 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
ddfe49b4
JB		 318 tracking ? 0 :
319 IEEE80211_CHAN_DISABLED)) {
6565ec9b
JB		 320 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
321 ret = IEEE80211_STA_DISABLE_HT |
322 IEEE80211_STA_DISABLE_VHT;
b56e4b85 323 break;
6565ec9b
JB		 324 }
325
e6b7cde4 326 ret |= ieee80211_chandef_downgrade(chandef);
6565ec9b
JB		 327 }
328
5cdaed1e 329 if (chandef->width != vht_chandef.width && !tracking)
6565ec9b
JB		 330 sdata_info(sdata,
331 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
332
333 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
334 return ret;
335}
336
30eb1dc2
JB		 337static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
338 struct sta_info *sta,
53b954ee 339 const struct ieee80211_ht_cap *ht_cap,
30eb1dc2
JB		 340 const struct ieee80211_ht_operation *ht_oper,
341 const struct ieee80211_vht_operation *vht_oper,
342 const u8 *bssid, u32 *changed)
d5522e03
JB		 343{
344 struct ieee80211_local *local = sdata->local;
30eb1dc2 345 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d5522e03 346 struct ieee80211_supported_band *sband;
55de908a 347 struct ieee80211_channel *chan;
30eb1dc2 348 struct cfg80211_chan_def chandef;
9ed6bcce 349 u16 ht_opmode;
30eb1dc2
JB		 350 u32 flags;
351 enum ieee80211_sta_rx_bandwidth new_sta_bw;
352 int ret;
d5522e03 353
30eb1dc2
JB		 354 /* if HT was/is disabled, don't track any bandwidth changes */
355 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
1128958d
JB		 356 return 0;
357
30eb1dc2
JB		 358 /* don't check VHT if we associated as non-VHT station */
359 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
360 vht_oper = NULL;
361
362 if (WARN_ON_ONCE(!sta))
363 return -EINVAL;
364
017b45bb
AA		 365 /*
366 * if bss configuration changed store the new one -
367 * this may be applicable even if channel is identical
368 */
369 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
370 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
371 *changed |= BSS_CHANGED_HT;
372 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
373 }
374
f2d9330e 375 chan = sdata->vif.bss_conf.chandef.chan;
55de908a 376 sband = local->hw.wiphy->bands[chan->band];
d5522e03 377
30eb1dc2 378 /* calculate new channel (type) based on HT/VHT operation IEs */
53b954ee
EP		 379 flags = ieee80211_determine_chantype(sdata, sband, chan,
380 ht_cap, ht_oper, vht_oper,
381 &chandef, true);
30eb1dc2
JB		 382
383 /*
384 * Downgrade the new channel if we associated with restricted
385 * capabilities. For example, if we associated as a 20 MHz STA
386 * to a 40 MHz AP (due to regulatory, capabilities or config
387 * reasons) then switching to a 40 MHz channel now won't do us
388 * any good -- we couldn't use it with the AP.
389 */
390 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
391 chandef.width == NL80211_CHAN_WIDTH_80P80)
e6b7cde4 392 flags |= ieee80211_chandef_downgrade(&chandef);
30eb1dc2
JB		 393 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
394 chandef.width == NL80211_CHAN_WIDTH_160)
e6b7cde4 395 flags |= ieee80211_chandef_downgrade(&chandef);
30eb1dc2
JB		 396 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
397 chandef.width > NL80211_CHAN_WIDTH_20)
e6b7cde4 398 flags |= ieee80211_chandef_downgrade(&chandef);
30eb1dc2
JB		 399
400 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
401 return 0;
402
403 sdata_info(sdata,
404 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
405 ifmgd->bssid, chandef.chan->center_freq, chandef.width,
406 chandef.center_freq1, chandef.center_freq2);
407
408 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
409 IEEE80211_STA_DISABLE_VHT |
410 IEEE80211_STA_DISABLE_40MHZ |
411 IEEE80211_STA_DISABLE_80P80MHZ |
412 IEEE80211_STA_DISABLE_160MHZ)) ||
413 !cfg80211_chandef_valid(&chandef)) {
414 sdata_info(sdata,
415 "AP %pM changed bandwidth in a way we can't support - disconnect\n",
416 ifmgd->bssid);
417 return -EINVAL;
418 }
419
420 switch (chandef.width) {
421 case NL80211_CHAN_WIDTH_20_NOHT:
422 case NL80211_CHAN_WIDTH_20:
423 new_sta_bw = IEEE80211_STA_RX_BW_20;
424 break;
4bf88530 425 case NL80211_CHAN_WIDTH_40:
30eb1dc2 426 new_sta_bw = IEEE80211_STA_RX_BW_40;
64f68e5d 427 break;
30eb1dc2
JB		 428 case NL80211_CHAN_WIDTH_80:
429 new_sta_bw = IEEE80211_STA_RX_BW_80;
430 break;
431 case NL80211_CHAN_WIDTH_80P80:
432 case NL80211_CHAN_WIDTH_160:
433 new_sta_bw = IEEE80211_STA_RX_BW_160;
64f68e5d 434 break;
30eb1dc2
JB		 435 default:
436 return -EINVAL;
64f68e5d 437 }
d5522e03 438
30eb1dc2
JB		 439 if (new_sta_bw > sta->cur_max_bandwidth)
440 new_sta_bw = sta->cur_max_bandwidth;
64f68e5d 441
30eb1dc2
JB		 442 if (new_sta_bw < sta->sta.bandwidth) {
443 sta->sta.bandwidth = new_sta_bw;
444 rate_control_rate_update(local, sband, sta,
445 IEEE80211_RC_BW_CHANGED);
446 }
64f68e5d 447
30eb1dc2
JB		 448 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
449 if (ret) {
450 sdata_info(sdata,
451 "AP %pM changed bandwidth to incompatible one - disconnect\n",
452 ifmgd->bssid);
453 return ret;
454 }
7cc44ed4 455
30eb1dc2
JB		 456 if (new_sta_bw > sta->sta.bandwidth) {
457 sta->sta.bandwidth = new_sta_bw;
458 rate_control_rate_update(local, sband, sta,
459 IEEE80211_RC_BW_CHANGED);
0aaffa9b 460 }
d5522e03 461
30eb1dc2 462 return 0;
d5522e03
JB		 463}
464
9c6bd790
JB		 465/* frame sending functions */
466
66e67e41 467static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
9dde6423 468 struct sk_buff *skb, u8 ap_ht_param,
66e67e41
JB		 469 struct ieee80211_supported_band *sband,
470 struct ieee80211_channel *channel,
471 enum ieee80211_smps_mode smps)
472{
66e67e41
JB		 473 u8 *pos;
474 u32 flags = channel->flags;
475 u16 cap;
476 struct ieee80211_sta_ht_cap ht_cap;
477
478 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
479
66e67e41
JB		 480 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
481 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
482
66e67e41
JB		 483 /* determine capability flags */
484 cap = ht_cap.cap;
485
9dde6423 486 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
66e67e41
JB		 487 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
488 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
489 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
490 cap &= ~IEEE80211_HT_CAP_SGI_40;
491 }
492 break;
493 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
494 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
495 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
496 cap &= ~IEEE80211_HT_CAP_SGI_40;
497 }
498 break;
499 }
500
24398e39
JB		 501 /*
502 * If 40 MHz was disabled associate as though we weren't
503 * capable of 40 MHz -- some broken APs will never fall
504 * back to trying to transmit in 20 MHz.
505 */
506 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
507 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
508 cap &= ~IEEE80211_HT_CAP_SGI_40;
509 }
510
66e67e41
JB		 511 /* set SM PS mode properly */
512 cap &= ~IEEE80211_HT_CAP_SM_PS;
513 switch (smps) {
514 case IEEE80211_SMPS_AUTOMATIC:
515 case IEEE80211_SMPS_NUM_MODES:
516 WARN_ON(1);
517 case IEEE80211_SMPS_OFF:
518 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
519 IEEE80211_HT_CAP_SM_PS_SHIFT;
520 break;
521 case IEEE80211_SMPS_STATIC:
522 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
523 IEEE80211_HT_CAP_SM_PS_SHIFT;
524 break;
525 case IEEE80211_SMPS_DYNAMIC:
526 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
527 IEEE80211_HT_CAP_SM_PS_SHIFT;
528 break;
529 }
530
531 /* reserve and fill IE */
532 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
533 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
534}
535
d545daba
MP		 536static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
537 struct sk_buff *skb,
b08fbbd8
JB		 538 struct ieee80211_supported_band *sband,
539 struct ieee80211_vht_cap *ap_vht_cap)
d545daba
MP		 540{
541 u8 *pos;
542 u32 cap;
543 struct ieee80211_sta_vht_cap vht_cap;
c1cf6d4e 544 u32 mask, ap_bf_sts, our_bf_sts;
d545daba
MP		 545
546 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
547
548 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
dd5ecfea 549 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
d545daba
MP		 550
551 /* determine capability flags */
552 cap = vht_cap.cap;
553
f2d9d270
JB		 554 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
555 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ;
556 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
557 }
558
559 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
560 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
561 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
562 }
563
b08fbbd8
JB		 564 /*
565 * Some APs apparently get confused if our capabilities are better
566 * than theirs, so restrict what we advertise in the assoc request.
567 */
568 if (!(ap_vht_cap->vht_cap_info &
569 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
570 cap &= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE;
571
c1cf6d4e
ES		 572 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK;
573
574 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask;
575 our_bf_sts = cap & mask;
576
577 if (ap_bf_sts < our_bf_sts) {
578 cap &= ~mask;
579 cap |= ap_bf_sts;
580 }
581
d545daba 582 /* reserve and fill IE */
d4950281 583 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
d545daba
MP		 584 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
585}
586
66e67e41
JB		 587static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
588{
589 struct ieee80211_local *local = sdata->local;
590 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
591 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
592 struct sk_buff *skb;
593 struct ieee80211_mgmt *mgmt;
594 u8 *pos, qos_info;
595 size_t offset = 0, noffset;
2103dec1 596 int i, count, rates_len, supp_rates_len, shift;
66e67e41
JB		 597 u16 capab;
598 struct ieee80211_supported_band *sband;
55de908a
JB		 599 struct ieee80211_chanctx_conf *chanctx_conf;
600 struct ieee80211_channel *chan;
2103dec1 601 u32 rate_flags, rates = 0;
66e67e41 602
8d61ffa5 603 sdata_assert_lock(sdata);
66e67e41 604
55de908a
JB		 605 rcu_read_lock();
606 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
607 if (WARN_ON(!chanctx_conf)) {
608 rcu_read_unlock();
609 return;
610 }
4bf88530 611 chan = chanctx_conf->def.chan;
2103dec1 612 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
55de908a
JB		 613 rcu_read_unlock();
614 sband = local->hw.wiphy->bands[chan->band];
2103dec1 615 shift = ieee80211_vif_get_shift(&sdata->vif);
66e67e41
JB		 616
617 if (assoc_data->supp_rates_len) {
618 /*
619 * Get all rates supported by the device and the AP as
620 * some APs don't like getting a superset of their rates
621 * in the association request (e.g. D-Link DAP 1353 in
622 * b-only mode)...
623 */
2103dec1
SW		 624 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
625 assoc_data->supp_rates,
626 assoc_data->supp_rates_len,
627 &rates);
66e67e41
JB		 628 } else {
629 /*
630 * In case AP not provide any supported rates information
631 * before association, we send information element(s) with
632 * all rates that we support.
633 */
2103dec1
SW		 634 rates_len = 0;
635 for (i = 0; i < sband->n_bitrates; i++) {
636 if ((rate_flags & sband->bitrates[i].flags)
637 != rate_flags)
638 continue;
639 rates |= BIT(i);
640 rates_len++;
641 }
66e67e41
JB		 642 }
643
644 skb = alloc_skb(local->hw.extra_tx_headroom +
645 sizeof(*mgmt) + /* bit too much but doesn't matter */
646 2 + assoc_data->ssid_len + /* SSID */
647 4 + rates_len + /* (extended) rates */
648 4 + /* power capability */
649 2 + 2 * sband->n_channels + /* supported channels */
650 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
d4950281 651 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
66e67e41
JB		 652 assoc_data->ie_len + /* extra IEs */
653 9, /* WMM */
654 GFP_KERNEL);
655 if (!skb)
656 return;
657
658 skb_reserve(skb, local->hw.extra_tx_headroom);
659
660 capab = WLAN_CAPABILITY_ESS;
661
662 if (sband->band == IEEE80211_BAND_2GHZ) {
663 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
664 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
665 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
666 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
667 }
668
669 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
670 capab |= WLAN_CAPABILITY_PRIVACY;
671
672 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
673 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
674 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
675
cd2f5dd7
AK		 676 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM)
677 capab |= WLAN_CAPABILITY_RADIO_MEASURE;
678
66e67e41
JB		 679 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
680 memset(mgmt, 0, 24);
681 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
682 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
683 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
684
685 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
686 skb_put(skb, 10);
687 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
688 IEEE80211_STYPE_REASSOC_REQ);
689 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
690 mgmt->u.reassoc_req.listen_interval =
691 cpu_to_le16(local->hw.conf.listen_interval);
692 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
693 ETH_ALEN);
694 } else {
695 skb_put(skb, 4);
696 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
697 IEEE80211_STYPE_ASSOC_REQ);
698 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
699 mgmt->u.assoc_req.listen_interval =
700 cpu_to_le16(local->hw.conf.listen_interval);
701 }
702
703 /* SSID */
704 pos = skb_put(skb, 2 + assoc_data->ssid_len);
705 *pos++ = WLAN_EID_SSID;
706 *pos++ = assoc_data->ssid_len;
707 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
708
709 /* add all rates which were marked to be used above */
710 supp_rates_len = rates_len;
711 if (supp_rates_len > 8)
712 supp_rates_len = 8;
713
714 pos = skb_put(skb, supp_rates_len + 2);
715 *pos++ = WLAN_EID_SUPP_RATES;
716 *pos++ = supp_rates_len;
717
718 count = 0;
719 for (i = 0; i < sband->n_bitrates; i++) {
720 if (BIT(i) & rates) {
2103dec1
SW		 721 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
722 5 * (1 << shift));
723 *pos++ = (u8) rate;
66e67e41
JB		 724 if (++count == 8)
725 break;
726 }
727 }
728
729 if (rates_len > count) {
730 pos = skb_put(skb, rates_len - count + 2);
731 *pos++ = WLAN_EID_EXT_SUPP_RATES;
732 *pos++ = rates_len - count;
733
734 for (i++; i < sband->n_bitrates; i++) {
735 if (BIT(i) & rates) {
2103dec1
SW		 736 int rate;
737 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
738 5 * (1 << shift));
739 *pos++ = (u8) rate;
66e67e41
JB		 740 }
741 }
742 }
743
cd2f5dd7
AK		 744 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT ||
745 capab & WLAN_CAPABILITY_RADIO_MEASURE) {
66e67e41
JB		 746 pos = skb_put(skb, 4);
747 *pos++ = WLAN_EID_PWR_CAPABILITY;
748 *pos++ = 2;
749 *pos++ = 0; /* min tx power */
0430c883
SW		 750 /* max tx power */
751 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
cd2f5dd7 752 }
66e67e41 753
cd2f5dd7 754 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
66e67e41
JB		 755 /* TODO: get this in reg domain format */
756 pos = skb_put(skb, 2 * sband->n_channels + 2);
757 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
758 *pos++ = 2 * sband->n_channels;
759 for (i = 0; i < sband->n_channels; i++) {
760 *pos++ = ieee80211_frequency_to_channel(
761 sband->channels[i].center_freq);
762 *pos++ = 1; /* one channel in the subband*/
763 }
764 }
765
766 /* if present, add any custom IEs that go before HT */
b3f51e94 767 if (assoc_data->ie_len) {
66e67e41
JB		 768 static const u8 before_ht[] = {
769 WLAN_EID_SSID,
770 WLAN_EID_SUPP_RATES,
771 WLAN_EID_EXT_SUPP_RATES,
772 WLAN_EID_PWR_CAPABILITY,
773 WLAN_EID_SUPPORTED_CHANNELS,
774 WLAN_EID_RSN,
775 WLAN_EID_QOS_CAPA,
776 WLAN_EID_RRM_ENABLED_CAPABILITIES,
777 WLAN_EID_MOBILITY_DOMAIN,
8ed28747
JB		 778 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */
779 WLAN_EID_RIC_DATA, /* reassoc only */
66e67e41
JB		 780 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
781 };
8ed28747
JB		 782 static const u8 after_ric[] = {
783 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
784 WLAN_EID_HT_CAPABILITY,
785 WLAN_EID_BSS_COEX_2040,
786 WLAN_EID_EXT_CAPABILITY,
787 WLAN_EID_QOS_TRAFFIC_CAPA,
788 WLAN_EID_TIM_BCAST_REQ,
789 WLAN_EID_INTERWORKING,
790 /* 60GHz doesn't happen right now */
791 WLAN_EID_VHT_CAPABILITY,
792 WLAN_EID_OPMODE_NOTIF,
793 };
794
795 noffset = ieee80211_ie_split_ric(assoc_data->ie,
796 assoc_data->ie_len,
797 before_ht,
798 ARRAY_SIZE(before_ht),
799 after_ric,
800 ARRAY_SIZE(after_ric),
801 offset);
66e67e41
JB		 802 pos = skb_put(skb, noffset - offset);
803 memcpy(pos, assoc_data->ie + offset, noffset - offset);
804 offset = noffset;
805 }
806
f2d9d270
JB		 807 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
808 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
809 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
810
a8243b72 811 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
9dde6423 812 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
04ecd257 813 sband, chan, sdata->smps_mode);
66e67e41 814
3de3802c
JB		 815 /* if present, add any custom IEs that go before VHT */
816 if (assoc_data->ie_len) {
817 static const u8 before_vht[] = {
818 WLAN_EID_SSID,
819 WLAN_EID_SUPP_RATES,
820 WLAN_EID_EXT_SUPP_RATES,
821 WLAN_EID_PWR_CAPABILITY,
822 WLAN_EID_SUPPORTED_CHANNELS,
823 WLAN_EID_RSN,
824 WLAN_EID_QOS_CAPA,
825 WLAN_EID_RRM_ENABLED_CAPABILITIES,
826 WLAN_EID_MOBILITY_DOMAIN,
827 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
828 WLAN_EID_HT_CAPABILITY,
829 WLAN_EID_BSS_COEX_2040,
830 WLAN_EID_EXT_CAPABILITY,
831 WLAN_EID_QOS_TRAFFIC_CAPA,
832 WLAN_EID_TIM_BCAST_REQ,
833 WLAN_EID_INTERWORKING,
834 };
8ed28747
JB		 835
836 /* RIC already taken above, so no need to handle here anymore */
3de3802c
JB		 837 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
838 before_vht, ARRAY_SIZE(before_vht),
839 offset);
840 pos = skb_put(skb, noffset - offset);
841 memcpy(pos, assoc_data->ie + offset, noffset - offset);
842 offset = noffset;
843 }
844
d545daba 845 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
b08fbbd8
JB		 846 ieee80211_add_vht_ie(sdata, skb, sband,
847 &assoc_data->ap_vht_cap);
d545daba 848
66e67e41 849 /* if present, add any custom non-vendor IEs that go after HT */
b3f51e94 850 if (assoc_data->ie_len) {
66e67e41
JB		 851 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
852 assoc_data->ie_len,
853 offset);
854 pos = skb_put(skb, noffset - offset);
855 memcpy(pos, assoc_data->ie + offset, noffset - offset);
856 offset = noffset;
857 }
858
76f0303d
JB		 859 if (assoc_data->wmm) {
860 if (assoc_data->uapsd) {
dc41e4d4
EP		 861 qos_info = ifmgd->uapsd_queues;
862 qos_info |= (ifmgd->uapsd_max_sp_len <<
66e67e41
JB		 863 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
864 } else {
865 qos_info = 0;
866 }
867
40b861a0 868 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
66e67e41
JB		 869 }
870
871 /* add any remaining custom (i.e. vendor specific here) IEs */
b3f51e94 872 if (assoc_data->ie_len) {
66e67e41
JB		 873 noffset = assoc_data->ie_len;
874 pos = skb_put(skb, noffset - offset);
875 memcpy(pos, assoc_data->ie + offset, noffset - offset);
876 }
877
a1845fc7
JB		 878 drv_mgd_prepare_tx(local, sdata);
879
66e67e41 880 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1672c0e3
JB		 881 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
882 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
883 IEEE80211_TX_INTFL_MLME_CONN_TX;
66e67e41
JB		 884 ieee80211_tx_skb(sdata, skb);
885}
886
572e0012
KV		 887void ieee80211_send_pspoll(struct ieee80211_local *local,
888 struct ieee80211_sub_if_data *sdata)
889{
572e0012
KV		 890 struct ieee80211_pspoll *pspoll;
891 struct sk_buff *skb;
572e0012 892
d8cd189e
KV		 893 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
894 if (!skb)
572e0012 895 return;
572e0012 896
d8cd189e
KV		 897 pspoll = (struct ieee80211_pspoll *) skb->data;
898 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
572e0012 899
62ae67be
JB		 900 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
901 ieee80211_tx_skb(sdata, skb);
572e0012
KV		 902}
903
965bedad
JB		 904void ieee80211_send_nullfunc(struct ieee80211_local *local,
905 struct ieee80211_sub_if_data *sdata,
906 int powersave)
907{
908 struct sk_buff *skb;
d8cd189e 909 struct ieee80211_hdr_3addr *nullfunc;
b6f35301 910 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
965bedad 911
d8cd189e
KV		 912 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
913 if (!skb)
965bedad 914 return;
965bedad 915
d8cd189e 916 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
965bedad 917 if (powersave)
d8cd189e 918 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
965bedad 919
6c17b77b
SF		 920 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
921 IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
ff40b425
PF		 922
923 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
924 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
925
392b9ffb 926 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
b6f35301
RM		 927 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
928
62ae67be 929 ieee80211_tx_skb(sdata, skb);
965bedad
JB		 930}
931
d524215f
FF		 932static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
933 struct ieee80211_sub_if_data *sdata)
934{
935 struct sk_buff *skb;
936 struct ieee80211_hdr *nullfunc;
937 __le16 fc;
938
939 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
940 return;
941
942 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
d15b8459 943 if (!skb)
d524215f 944 return;
d15b8459 945
d524215f
FF		 946 skb_reserve(skb, local->hw.extra_tx_headroom);
947
948 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
949 memset(nullfunc, 0, 30);
950 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
951 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
952 nullfunc->frame_control = fc;
953 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
954 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
955 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
956 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
957
958 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
959 ieee80211_tx_skb(sdata, skb);
960}
961
cc32abd4
JB		 962/* spectrum management related things */
963static void ieee80211_chswitch_work(struct work_struct *work)
964{
965 struct ieee80211_sub_if_data *sdata =
966 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
675a0b04 967 struct ieee80211_local *local = sdata->local;
cc32abd4 968 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
7578d575 969 int ret;
cc32abd4 970
9607e6b6 971 if (!ieee80211_sdata_running(sdata))
cc32abd4
JB		 972 return;
973
8d61ffa5 974 sdata_lock(sdata);
4c3ebc56
MK		 975 mutex_lock(&local->mtx);
976 mutex_lock(&local->chanctx_mtx);
977
77fdaa12
JB		 978 if (!ifmgd->associated)
979 goto out;
cc32abd4 980
4c3ebc56
MK		 981 if (!sdata->vif.csa_active)
982 goto out;
983
984 /*
985 * using reservation isn't immediate as it may be deferred until later
986 * with multi-vif. once reservation is complete it will re-schedule the
987 * work with no reserved_chanctx so verify chandef to check if it
988 * completed successfully
989 */
990
991 if (sdata->reserved_chanctx) {
992 /*
993 * with multi-vif csa driver may call ieee80211_csa_finish()
994 * many times while waiting for other interfaces to use their
995 * reservations
996 */
997 if (sdata->reserved_ready)
998 goto out;
999
1000 ret = ieee80211_vif_use_reserved_context(sdata);
1001 if (ret) {
1002 sdata_info(sdata,
1003 "failed to use reserved channel context, disconnecting (err=%d)\n",
1004 ret);
1005 ieee80211_queue_work(&sdata->local->hw,
1006 &ifmgd->csa_connection_drop_work);
1007 goto out;
1008 }
1009
1010 goto out;
1011 }
1012
1013 if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
1014 &sdata->csa_chandef)) {
7578d575 1015 sdata_info(sdata,
4c3ebc56 1016 "failed to finalize channel switch, disconnecting\n");
7578d575
AN		 1017 ieee80211_queue_work(&sdata->local->hw,
1018 &ifmgd->csa_connection_drop_work);
1019 goto out;
1020 }
675a0b04 1021
cc32abd4 1022 /* XXX: shouldn't really modify cfg80211-owned data! */
33787fc4 1023 ifmgd->associated->channel = sdata->csa_chandef.chan;
cc32abd4 1024
0c21e632
LC		 1025 ifmgd->csa_waiting_bcn = true;
1026
1027 ieee80211_sta_reset_beacon_monitor(sdata);
1028 ieee80211_sta_reset_conn_monitor(sdata);
1029
1030out:
1031 mutex_unlock(&local->chanctx_mtx);
1032 mutex_unlock(&local->mtx);
1033 sdata_unlock(sdata);
1034}
1035
1036static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata)
1037{
1038 struct ieee80211_local *local = sdata->local;
1039 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1040 int ret;
1041
1042 sdata_assert_lock(sdata);
1043
1044 WARN_ON(!sdata->vif.csa_active);
4c3ebc56 1045
a46992b4
LC		 1046 if (sdata->csa_block_tx) {
1047 ieee80211_wake_vif_queues(local, sdata,
1048 IEEE80211_QUEUE_STOP_REASON_CSA);
1049 sdata->csa_block_tx = false;
1050 }
7578d575 1051
d04b5ac9
LC		 1052 cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef);
1053
0c21e632
LC		 1054 sdata->vif.csa_active = false;
1055 ifmgd->csa_waiting_bcn = false;
1056
f1d65583
LC		 1057 ret = drv_post_channel_switch(sdata);
1058 if (ret) {
1059 sdata_info(sdata,
1060 "driver post channel switch failed, disconnecting\n");
1061 ieee80211_queue_work(&local->hw,
1062 &ifmgd->csa_connection_drop_work);
0c21e632 1063 return;
f1d65583 1064 }
cc32abd4
JB		 1065}
1066
5ce6e438
JB		 1067void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1068{
55de908a
JB		 1069 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1070 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5ce6e438
JB		 1071
1072 trace_api_chswitch_done(sdata, success);
1073 if (!success) {
882a7c69
JB		 1074 sdata_info(sdata,
1075 "driver channel switch failed, disconnecting\n");
1076 ieee80211_queue_work(&sdata->local->hw,
1077 &ifmgd->csa_connection_drop_work);
1078 } else {
1079 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
5ce6e438 1080 }
5ce6e438
JB		 1081}
1082EXPORT_SYMBOL(ieee80211_chswitch_done);
1083
cc32abd4
JB		 1084static void ieee80211_chswitch_timer(unsigned long data)
1085{
1086 struct ieee80211_sub_if_data *sdata =
1087 (struct ieee80211_sub_if_data *) data;
5bb644a0 1088
9b7d72c1 1089 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
cc32abd4
JB		 1090}
1091
37799e52 1092static void
4a3cb702 1093ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
2ba45384
LC		 1094 u64 timestamp, u32 device_timestamp,
1095 struct ieee802_11_elems *elems,
04a161f4 1096 bool beacon)
cc32abd4 1097{
b4f286a1 1098 struct ieee80211_local *local = sdata->local;
cc32abd4 1099 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
37799e52 1100 struct cfg80211_bss *cbss = ifmgd->associated;
4c3ebc56 1101 struct ieee80211_chanctx_conf *conf;
55de908a 1102 struct ieee80211_chanctx *chanctx;
e6b7cde4 1103 enum ieee80211_band current_band;
c0f17eb9 1104 struct ieee80211_csa_ie csa_ie;
6d027bcc 1105 struct ieee80211_channel_switch ch_switch;
e6b7cde4 1106 int res;
cc32abd4 1107
8d61ffa5 1108 sdata_assert_lock(sdata);
77fdaa12 1109
37799e52 1110 if (!cbss)
cc32abd4
JB		 1111 return;
1112
b4f286a1 1113 if (local->scanning)
cc32abd4
JB		 1114 return;
1115
37799e52 1116 /* disregard subsequent announcements if we are already processing */
3e2a0226 1117 if (sdata->vif.csa_active)
cc32abd4
JB		 1118 return;
1119
e6b7cde4 1120 current_band = cbss->channel->band;
c0f17eb9 1121 memset(&csa_ie, 0, sizeof(csa_ie));
e6b7cde4
SW		 1122 res = ieee80211_parse_ch_switch_ie(sdata, elems, beacon, current_band,
1123 ifmgd->flags,
c0f17eb9 1124 ifmgd->associated->bssid, &csa_ie);
e6b7cde4 1125 if (res < 0)
b4f286a1 1126 ieee80211_queue_work(&local->hw,
882a7c69 1127 &ifmgd->csa_connection_drop_work);
e6b7cde4 1128 if (res)
cc32abd4 1129 return;
cd64f2a9 1130
c0f17eb9 1131 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
85220d71
JB		 1132 IEEE80211_CHAN_DISABLED)) {
1133 sdata_info(sdata,
1134 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
e6b7cde4 1135 ifmgd->associated->bssid,
c0f17eb9
CYY		 1136 csa_ie.chandef.chan->center_freq,
1137 csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1138 csa_ie.chandef.center_freq2);
85220d71
JB		 1139 ieee80211_queue_work(&local->hw,
1140 &ifmgd->csa_connection_drop_work);
1141 return;
1142 }
1143
4c3ebc56 1144 mutex_lock(&local->mtx);
7578d575 1145 mutex_lock(&local->chanctx_mtx);
4c3ebc56
MK		 1146 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1147 lockdep_is_held(&local->chanctx_mtx));
1148 if (!conf) {
1149 sdata_info(sdata,
1150 "no channel context assigned to vif?, disconnecting\n");
1151 ieee80211_queue_work(&local->hw,
1152 &ifmgd->csa_connection_drop_work);
1153 mutex_unlock(&local->chanctx_mtx);
1154 mutex_unlock(&local->mtx);
1155 return;
1156 }
1157
1158 chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1159
0f791eb4
LC		 1160 if (local->use_chanctx &&
1161 !(local->hw.flags & IEEE80211_HW_CHANCTX_STA_CSA)) {
1162 sdata_info(sdata,
1163 "driver doesn't support chan-switch with channel contexts\n");
1164 ieee80211_queue_work(&local->hw,
1165 &ifmgd->csa_connection_drop_work);
1166 mutex_unlock(&local->chanctx_mtx);
1167 mutex_unlock(&local->mtx);
1168 return;
55de908a
JB		 1169 }
1170
6d027bcc
LC		 1171 ch_switch.timestamp = timestamp;
1172 ch_switch.device_timestamp = device_timestamp;
1173 ch_switch.block_tx = csa_ie.mode;
1174 ch_switch.chandef = csa_ie.chandef;
1175 ch_switch.count = csa_ie.count;
1176
1177 if (drv_pre_channel_switch(sdata, &ch_switch)) {
1178 sdata_info(sdata,
1179 "preparing for channel switch failed, disconnecting\n");
1180 ieee80211_queue_work(&local->hw,
1181 &ifmgd->csa_connection_drop_work);
1182 mutex_unlock(&local->chanctx_mtx);
1183 mutex_unlock(&local->mtx);
1184 return;
1185 }
1186
4c3ebc56
MK		 1187 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1188 chanctx->mode, false);
1189 if (res) {
55de908a 1190 sdata_info(sdata,
4c3ebc56
MK		 1191 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1192 res);
b4f286a1 1193 ieee80211_queue_work(&local->hw,
55de908a 1194 &ifmgd->csa_connection_drop_work);
b4f286a1 1195 mutex_unlock(&local->chanctx_mtx);
4c3ebc56 1196 mutex_unlock(&local->mtx);
55de908a
JB		 1197 return;
1198 }
b4f286a1 1199 mutex_unlock(&local->chanctx_mtx);
55de908a 1200
c46a73f3 1201 sdata->vif.csa_active = true;
4c3ebc56 1202 sdata->csa_chandef = csa_ie.chandef;
59af6928 1203 sdata->csa_block_tx = csa_ie.mode;
55de908a 1204
59af6928 1205 if (sdata->csa_block_tx)
a46992b4
LC		 1206 ieee80211_stop_vif_queues(local, sdata,
1207 IEEE80211_QUEUE_STOP_REASON_CSA);
59af6928 1208 mutex_unlock(&local->mtx);
57eebdf3 1209
2f457293
LC		 1210 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef,
1211 csa_ie.count);
1212
b4f286a1 1213 if (local->ops->channel_switch) {
5ce6e438 1214 /* use driver's channel switch callback */
0f791eb4 1215 drv_channel_switch(local, sdata, &ch_switch);
5ce6e438
JB		 1216 return;
1217 }
1218
1219 /* channel switch handled in software */
c0f17eb9 1220 if (csa_ie.count <= 1)
b4f286a1 1221 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
57eebdf3 1222 else
cc32abd4 1223 mod_timer(&ifmgd->chswitch_timer,
c0f17eb9 1224 TU_TO_EXP_TIME(csa_ie.count * cbss->beacon_interval));
cc32abd4
JB		 1225}
1226
24a4e400
SG		 1227static bool
1228ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1229 struct ieee80211_channel *channel,
1230 const u8 *country_ie, u8 country_ie_len,
1231 const u8 *pwr_constr_elem,
1232 int *chan_pwr, int *pwr_reduction)
cc32abd4 1233{
04b7b2ff
JB		 1234 struct ieee80211_country_ie_triplet *triplet;
1235 int chan = ieee80211_frequency_to_channel(channel->center_freq);
24a4e400 1236 int i, chan_increment;
04b7b2ff 1237 bool have_chan_pwr = false;
cc32abd4 1238
04b7b2ff
JB		 1239 /* Invalid IE */
1240 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
24a4e400 1241 return false;
cc32abd4 1242
04b7b2ff
JB		 1243 triplet = (void *)(country_ie + 3);
1244 country_ie_len -= 3;
1245
1246 switch (channel->band) {
1247 default:
1248 WARN_ON_ONCE(1);
1249 /* fall through */
1250 case IEEE80211_BAND_2GHZ:
1251 case IEEE80211_BAND_60GHZ:
1252 chan_increment = 1;
1253 break;
1254 case IEEE80211_BAND_5GHZ:
1255 chan_increment = 4;
1256 break;
cc32abd4 1257 }
04b7b2ff
JB		 1258
1259 /* find channel */
1260 while (country_ie_len >= 3) {
1261 u8 first_channel = triplet->chans.first_channel;
1262
1263 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1264 goto next;
1265
1266 for (i = 0; i < triplet->chans.num_channels; i++) {
1267 if (first_channel + i * chan_increment == chan) {
1268 have_chan_pwr = true;
24a4e400 1269 *chan_pwr = triplet->chans.max_power;
04b7b2ff
JB		 1270 break;
1271 }
1272 }
1273 if (have_chan_pwr)
1274 break;
1275
1276 next:
1277 triplet++;
1278 country_ie_len -= 3;
1279 }
1280
24a4e400
SG		 1281 if (have_chan_pwr)
1282 *pwr_reduction = *pwr_constr_elem;
1283 return have_chan_pwr;
1284}
1285
c8d65917
SG		 1286static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
1287 struct ieee80211_channel *channel,
1288 const u8 *cisco_dtpc_ie,
1289 int *pwr_level)
1290{
1291 /* From practical testing, the first data byte of the DTPC element
1292 * seems to contain the requested dBm level, and the CLI on Cisco
1293 * APs clearly state the range is -127 to 127 dBm, which indicates
1294 * a signed byte, although it seemingly never actually goes negative.
1295 * The other byte seems to always be zero.
1296 */
1297 *pwr_level = (__s8)cisco_dtpc_ie[4];
1298}
1299
24a4e400
SG		 1300static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1301 struct ieee80211_channel *channel,
1302 struct ieee80211_mgmt *mgmt,
1303 const u8 *country_ie, u8 country_ie_len,
c8d65917
SG		 1304 const u8 *pwr_constr_ie,
1305 const u8 *cisco_dtpc_ie)
24a4e400 1306{
c8d65917
SG		 1307 bool has_80211h_pwr = false, has_cisco_pwr = false;
1308 int chan_pwr = 0, pwr_reduction_80211h = 0;
1309 int pwr_level_cisco, pwr_level_80211h;
24a4e400 1310 int new_ap_level;
04b7b2ff 1311
24a4e400
SG		 1312 if (country_ie && pwr_constr_ie &&
1313 mgmt->u.probe_resp.capab_info &
1314 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT)) {
1315 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
1316 sdata, channel, country_ie, country_ie_len,
1317 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
c8d65917
SG		 1318 pwr_level_80211h =
1319 max_t(int, 0, chan_pwr - pwr_reduction_80211h);
1320 }
1321
1322 if (cisco_dtpc_ie) {
1323 ieee80211_find_cisco_dtpc(
1324 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
1325 has_cisco_pwr = true;
24a4e400 1326 }
04b7b2ff 1327
c8d65917 1328 if (!has_80211h_pwr && !has_cisco_pwr)
1ea6f9c0 1329 return 0;
04b7b2ff 1330
c8d65917
SG		 1331 /* If we have both 802.11h and Cisco DTPC, apply both limits
1332 * by picking the smallest of the two power levels advertised.
1333 */
1334 if (has_80211h_pwr &&
1335 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
1336 sdata_info(sdata,
1337 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1338 pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
1339 sdata->u.mgd.bssid);
1340 new_ap_level = pwr_level_80211h;
1341 } else { /* has_cisco_pwr is always true here. */
1342 sdata_info(sdata,
1343 "Limiting TX power to %d dBm as advertised by %pM\n",
1344 pwr_level_cisco, sdata->u.mgd.bssid);
1345 new_ap_level = pwr_level_cisco;
1346 }
04b7b2ff 1347
1ea6f9c0
JB		 1348 if (sdata->ap_power_level == new_ap_level)
1349 return 0;
04b7b2ff 1350
1ea6f9c0
JB		 1351 sdata->ap_power_level = new_ap_level;
1352 if (__ieee80211_recalc_txpower(sdata))
1353 return BSS_CHANGED_TXPOWER;
1354 return 0;
cc32abd4
JB		 1355}
1356
965bedad
JB		 1357/* powersave */
1358static void ieee80211_enable_ps(struct ieee80211_local *local,
1359 struct ieee80211_sub_if_data *sdata)
1360{
1361 struct ieee80211_conf *conf = &local->hw.conf;
1362
d5edaedc
JB		 1363 /*
1364 * If we are scanning right now then the parameters will
1365 * take effect when scan finishes.
1366 */
fbe9c429 1367 if (local->scanning)
d5edaedc
JB		 1368 return;
1369
965bedad
JB		 1370 if (conf->dynamic_ps_timeout > 0 &&
1371 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
1372 mod_timer(&local->dynamic_ps_timer, jiffies +
1373 msecs_to_jiffies(conf->dynamic_ps_timeout));
1374 } else {
1375 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1376 ieee80211_send_nullfunc(local, sdata, 1);
375177bf 1377
2a13052f
JO		 1378 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1379 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
1380 return;
1381
1382 conf->flags |= IEEE80211_CONF_PS;
1383 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965bedad
JB		 1384 }
1385}
1386
1387static void ieee80211_change_ps(struct ieee80211_local *local)
1388{
1389 struct ieee80211_conf *conf = &local->hw.conf;
1390
1391 if (local->ps_sdata) {
965bedad
JB		 1392 ieee80211_enable_ps(local, local->ps_sdata);
1393 } else if (conf->flags & IEEE80211_CONF_PS) {
1394 conf->flags &= ~IEEE80211_CONF_PS;
1395 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1396 del_timer_sync(&local->dynamic_ps_timer);
1397 cancel_work_sync(&local->dynamic_ps_enable_work);
1398 }
1399}
1400
808118cb
JY		 1401static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1402{
1403 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1404 struct sta_info *sta = NULL;
c2c98fde 1405 bool authorized = false;
808118cb
JY		 1406
1407 if (!mgd->powersave)
1408 return false;
1409
05cb9108
JB		 1410 if (mgd->broken_ap)
1411 return false;
1412
808118cb
JY		 1413 if (!mgd->associated)
1414 return false;
1415
392b9ffb 1416 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
808118cb
JY		 1417 return false;
1418
989c6505 1419 if (!mgd->have_beacon)
ce857888
AB		 1420 return false;
1421
808118cb
JY		 1422 rcu_read_lock();
1423 sta = sta_info_get(sdata, mgd->bssid);
1424 if (sta)
c2c98fde 1425 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
808118cb
JY		 1426 rcu_read_unlock();
1427
c2c98fde 1428 return authorized;
808118cb
JY		 1429}
1430
965bedad 1431/* need to hold RTNL or interface lock */
10f644a4 1432void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 1433{
1434 struct ieee80211_sub_if_data *sdata, *found = NULL;
1435 int count = 0;
195e294d 1436 int timeout;
965bedad
JB		 1437
1438 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
1439 local->ps_sdata = NULL;
1440 return;
1441 }
1442
1443 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 1444 if (!ieee80211_sdata_running(sdata))
965bedad 1445 continue;
8c7914de
RM		 1446 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1447 /* If an AP vif is found, then disable PS
1448 * by setting the count to zero thereby setting
1449 * ps_sdata to NULL.
1450 */
1451 count = 0;
1452 break;
1453 }
965bedad
JB		 1454 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1455 continue;
1456 found = sdata;
1457 count++;
1458 }
1459
808118cb 1460 if (count == 1 && ieee80211_powersave_allowed(found)) {
10f644a4
JB		 1461 s32 beaconint_us;
1462
1463 if (latency < 0)
ed77134b 1464 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
10f644a4
JB		 1465
1466 beaconint_us = ieee80211_tu_to_usec(
1467 found->vif.bss_conf.beacon_int);
1468
ff616381 1469 timeout = local->dynamic_ps_forced_timeout;
195e294d
JO		 1470 if (timeout < 0) {
1471 /*
ff616381
JO		 1472 * Go to full PSM if the user configures a very low
1473 * latency requirement.
0ab82b04
EP		 1474 * The 2000 second value is there for compatibility
1475 * until the PM_QOS_NETWORK_LATENCY is configured
1476 * with real values.
195e294d 1477 */
0ab82b04
EP		 1478 if (latency > (1900 * USEC_PER_MSEC) &&
1479 latency != (2000 * USEC_PER_SEC))
195e294d 1480 timeout = 0;
ff616381
JO		 1481 else
1482 timeout = 100;
195e294d 1483 }
09b85568 1484 local->hw.conf.dynamic_ps_timeout = timeout;
195e294d 1485
04fe2037 1486 if (beaconint_us > latency) {
10f644a4 1487 local->ps_sdata = NULL;
04fe2037 1488 } else {
04fe2037 1489 int maxslp = 1;
826262c3 1490 u8 dtimper = found->u.mgd.dtim_period;
56007a02
JB		 1491
1492 /* If the TIM IE is invalid, pretend the value is 1 */
1493 if (!dtimper)
1494 dtimper = 1;
1495 else if (dtimper > 1)
04fe2037
JB		 1496 maxslp = min_t(int, dtimper,
1497 latency / beaconint_us);
1498
9ccebe61 1499 local->hw.conf.max_sleep_period = maxslp;
56007a02 1500 local->hw.conf.ps_dtim_period = dtimper;
10f644a4 1501 local->ps_sdata = found;
04fe2037 1502 }
10f644a4 1503 } else {
965bedad 1504 local->ps_sdata = NULL;
10f644a4 1505 }
965bedad
JB		 1506
1507 ieee80211_change_ps(local);
1508}
1509
ab095877
EP		 1510void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1511{
1512 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1513
1514 if (sdata->vif.bss_conf.ps != ps_allowed) {
1515 sdata->vif.bss_conf.ps = ps_allowed;
1516 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1517 }
1518}
1519
965bedad
JB		 1520void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1521{
1522 struct ieee80211_local *local =
1523 container_of(work, struct ieee80211_local,
1524 dynamic_ps_disable_work);
1525
1526 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1527 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1528 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1529 }
1530
1531 ieee80211_wake_queues_by_reason(&local->hw,
445ea4e8 1532 IEEE80211_MAX_QUEUE_MAP,
cca07b00
LC		 1533 IEEE80211_QUEUE_STOP_REASON_PS,
1534 false);
965bedad
JB		 1535}
1536
1537void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1538{
1539 struct ieee80211_local *local =
1540 container_of(work, struct ieee80211_local,
1541 dynamic_ps_enable_work);
1542 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
5e34069c 1543 struct ieee80211_if_managed *ifmgd;
1ddc2867
RM		 1544 unsigned long flags;
1545 int q;
965bedad
JB		 1546
1547 /* can only happen when PS was just disabled anyway */
1548 if (!sdata)
1549 return;
1550
5e34069c
CL		 1551 ifmgd = &sdata->u.mgd;
1552
965bedad
JB		 1553 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1554 return;
1555
09b85568 1556 if (local->hw.conf.dynamic_ps_timeout > 0) {
77b7023a
AN		 1557 /* don't enter PS if TX frames are pending */
1558 if (drv_tx_frames_pending(local)) {
1ddc2867
RM		 1559 mod_timer(&local->dynamic_ps_timer, jiffies +
1560 msecs_to_jiffies(
1561 local->hw.conf.dynamic_ps_timeout));
1562 return;
1563 }
77b7023a
AN		 1564
1565 /*
1566 * transmission can be stopped by others which leads to
1567 * dynamic_ps_timer expiry. Postpone the ps timer if it
1568 * is not the actual idle state.
1569 */
1570 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1571 for (q = 0; q < local->hw.queues; q++) {
1572 if (local->queue_stop_reasons[q]) {
1573 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1574 flags);
1575 mod_timer(&local->dynamic_ps_timer, jiffies +
1576 msecs_to_jiffies(
1577 local->hw.conf.dynamic_ps_timeout));
1578 return;
1579 }
1580 }
1581 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1ddc2867 1582 }
1ddc2867 1583
375177bf 1584 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
9c38a8b4 1585 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
a1598383 1586 if (drv_tx_frames_pending(local)) {
e8306f98
VN		 1587 mod_timer(&local->dynamic_ps_timer, jiffies +
1588 msecs_to_jiffies(
1589 local->hw.conf.dynamic_ps_timeout));
a1598383 1590 } else {
e8306f98
VN		 1591 ieee80211_send_nullfunc(local, sdata, 1);
1592 /* Flush to get the tx status of nullfunc frame */
39ecc01d 1593 ieee80211_flush_queues(local, sdata);
e8306f98 1594 }
f3e85b9e
VN		 1595 }
1596
2a13052f
JO		 1597 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1598 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
375177bf
VN		 1599 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1600 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1601 local->hw.conf.flags |= IEEE80211_CONF_PS;
1602 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1603 }
965bedad
JB		 1604}
1605
1606void ieee80211_dynamic_ps_timer(unsigned long data)
1607{
1608 struct ieee80211_local *local = (void *) data;
1609
78f1a8b7 1610 if (local->quiescing || local->suspended)
5bb644a0
JB		 1611 return;
1612
42935eca 1613 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 1614}
1615
164eb02d
SW		 1616void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1617{
1618 struct delayed_work *delayed_work =
1619 container_of(work, struct delayed_work, work);
1620 struct ieee80211_sub_if_data *sdata =
1621 container_of(delayed_work, struct ieee80211_sub_if_data,
1622 dfs_cac_timer_work);
d2859df5 1623 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
164eb02d 1624
34a3740d
JB		 1625 mutex_lock(&sdata->local->mtx);
1626 if (sdata->wdev.cac_started) {
1627 ieee80211_vif_release_channel(sdata);
1628 cfg80211_cac_event(sdata->dev, &chandef,
1629 NL80211_RADAR_CAC_FINISHED,
1630 GFP_KERNEL);
1631 }
1632 mutex_unlock(&sdata->local->mtx);
164eb02d
SW		 1633}
1634
02219b3a
JB		 1635static bool
1636__ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1637{
1638 struct ieee80211_local *local = sdata->local;
1639 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1640 bool ret;
1641 int ac;
1642
1643 if (local->hw.queues < IEEE80211_NUM_ACS)
1644 return false;
1645
1646 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1647 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
1648 int non_acm_ac;
1649 unsigned long now = jiffies;
1650
1651 if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
1652 tx_tspec->admitted_time &&
1653 time_after(now, tx_tspec->time_slice_start + HZ)) {
1654 tx_tspec->consumed_tx_time = 0;
1655 tx_tspec->time_slice_start = now;
1656
1657 if (tx_tspec->downgraded)
1658 tx_tspec->action =
1659 TX_TSPEC_ACTION_STOP_DOWNGRADE;
1660 }
1661
1662 switch (tx_tspec->action) {
1663 case TX_TSPEC_ACTION_STOP_DOWNGRADE:
1664 /* take the original parameters */
1665 if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac]))
1666 sdata_err(sdata,
1667 "failed to set TX queue parameters for queue %d\n",
1668 ac);
1669 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1670 tx_tspec->downgraded = false;
1671 ret = true;
1672 break;
1673 case TX_TSPEC_ACTION_DOWNGRADE:
1674 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
1675 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1676 ret = true;
1677 break;
1678 }
1679 /* downgrade next lower non-ACM AC */
1680 for (non_acm_ac = ac + 1;
1681 non_acm_ac < IEEE80211_NUM_ACS;
1682 non_acm_ac++)
1683 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
1684 break;
1685 /* The loop will result in using BK even if it requires
1686 * admission control, such configuration makes no sense
1687 * and we have to transmit somehow - the AC selection
1688 * does the same thing.
1689 */
1690 if (drv_conf_tx(local, sdata, ac,
1691 &sdata->tx_conf[non_acm_ac]))
1692 sdata_err(sdata,
1693 "failed to set TX queue parameters for queue %d\n",
1694 ac);
1695 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1696 ret = true;
1697 schedule_delayed_work(&ifmgd->tx_tspec_wk,
1698 tx_tspec->time_slice_start + HZ - now + 1);
1699 break;
1700 case TX_TSPEC_ACTION_NONE:
1701 /* nothing now */
1702 break;
1703 }
1704 }
1705
1706 return ret;
1707}
1708
1709void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1710{
1711 if (__ieee80211_sta_handle_tspec_ac_params(sdata))
1712 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1713}
1714
1715static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
1716{
1717 struct ieee80211_sub_if_data *sdata;
1718
1719 sdata = container_of(work, struct ieee80211_sub_if_data,
1720 u.mgd.tx_tspec_wk.work);
1721 ieee80211_sta_handle_tspec_ac_params(sdata);
1722}
1723
60f8b39c 1724/* MLME */
7d25745d 1725static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
4ced3f74 1726 struct ieee80211_sub_if_data *sdata,
4a3cb702 1727 const u8 *wmm_param, size_t wmm_param_len)
f0706e82 1728{
f0706e82 1729 struct ieee80211_tx_queue_params params;
4ced3f74 1730 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1731 size_t left;
1732 int count;
4a3cb702
JB		 1733 const u8 *pos;
1734 u8 uapsd_queues = 0;
f0706e82 1735
e1b3ec1a 1736 if (!local->ops->conf_tx)
7d25745d 1737 return false;
e1b3ec1a 1738
32c5057b 1739 if (local->hw.queues < IEEE80211_NUM_ACS)
7d25745d 1740 return false;
3434fbd3
JB		 1741
1742 if (!wmm_param)
7d25745d 1743 return false;
3434fbd3 1744
f0706e82 1745 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
7d25745d 1746 return false;
ab13315a
KV		 1747
1748 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
dc41e4d4 1749 uapsd_queues = ifmgd->uapsd_queues;
ab13315a 1750
f0706e82 1751 count = wmm_param[6] & 0x0f;
46900298 1752 if (count == ifmgd->wmm_last_param_set)
7d25745d 1753 return false;
46900298 1754 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 1755
1756 pos = wmm_param + 8;
1757 left = wmm_param_len - 8;
1758
1759 memset(&params, 0, sizeof(params));
1760
00e96dec 1761 sdata->wmm_acm = 0;
f0706e82
JB		 1762 for (; left >= 4; left -= 4, pos += 4) {
1763 int aci = (pos[0] >> 5) & 0x03;
1764 int acm = (pos[0] >> 4) & 0x01;
ab13315a 1765 bool uapsd = false;
f0706e82
JB		 1766 int queue;
1767
1768 switch (aci) {
0eeb59fe 1769 case 1: /* AC_BK */
e100bb64 1770 queue = 3;
988c0f72 1771 if (acm)
00e96dec 1772 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV		 1773 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1774 uapsd = true;
f0706e82 1775 break;
0eeb59fe 1776 case 2: /* AC_VI */
e100bb64 1777 queue = 1;
988c0f72 1778 if (acm)
00e96dec 1779 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV		 1780 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1781 uapsd = true;
f0706e82 1782 break;
0eeb59fe 1783 case 3: /* AC_VO */
e100bb64 1784 queue = 0;
988c0f72 1785 if (acm)
00e96dec 1786 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV		 1787 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1788 uapsd = true;
f0706e82 1789 break;
0eeb59fe 1790 case 0: /* AC_BE */
f0706e82 1791 default:
e100bb64 1792 queue = 2;
988c0f72 1793 if (acm)
00e96dec 1794 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV		 1795 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1796 uapsd = true;
f0706e82
JB		 1797 break;
1798 }
1799
1800 params.aifs = pos[0] & 0x0f;
1801 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1802 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 1803 params.txop = get_unaligned_le16(pos + 2);
908f8d07 1804 params.acm = acm;
ab13315a
KV		 1805 params.uapsd = uapsd;
1806
bdcbd8e0 1807 mlme_dbg(sdata,
02219b3a 1808 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
bdcbd8e0
JB		 1809 queue, aci, acm,
1810 params.aifs, params.cw_min, params.cw_max,
02219b3a
JB		 1811 params.txop, params.uapsd,
1812 ifmgd->tx_tspec[queue].downgraded);
f6f3def3 1813 sdata->tx_conf[queue] = params;
02219b3a
JB		 1814 if (!ifmgd->tx_tspec[queue].downgraded &&
1815 drv_conf_tx(local, sdata, queue, &params))
bdcbd8e0
JB		 1816 sdata_err(sdata,
1817 "failed to set TX queue parameters for queue %d\n",
1818 queue);
f0706e82 1819 }
e1b3ec1a
SG		 1820
1821 /* enable WMM or activate new settings */
4ced3f74 1822 sdata->vif.bss_conf.qos = true;
7d25745d 1823 return true;
f0706e82
JB		 1824}
1825
925e64c3
SG		 1826static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1827{
1828 lockdep_assert_held(&sdata->local->mtx);
1829
392b9ffb 1830 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
925e64c3
SG		 1831 ieee80211_run_deferred_scan(sdata->local);
1832}
1833
1834static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1835{
1836 mutex_lock(&sdata->local->mtx);
1837 __ieee80211_stop_poll(sdata);
1838 mutex_unlock(&sdata->local->mtx);
1839}
1840
7a5158ef
JB		 1841static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1842 u16 capab, bool erp_valid, u8 erp)
5628221c 1843{
bda3933a 1844 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 1845 u32 changed = 0;
7a5158ef
JB		 1846 bool use_protection;
1847 bool use_short_preamble;
1848 bool use_short_slot;
1849
1850 if (erp_valid) {
1851 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1852 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1853 } else {
1854 use_protection = false;
1855 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1856 }
1857
1858 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
55de908a 1859 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
43d35343 1860 use_short_slot = true;
5628221c 1861
471b3efd 1862 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 1863 bss_conf->use_cts_prot = use_protection;
1864 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 1865 }
7e9ed188 1866
d43c7b37 1867 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 1868 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 1869 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 1870 }
d9430a32 1871
7a5158ef 1872 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 1873 bss_conf->use_short_slot = use_short_slot;
1874 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 1875 }
1876
1877 return changed;
1878}
1879
f698d856 1880static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 1881 struct cfg80211_bss *cbss,
ae5eb026 1882 u32 bss_info_changed)
f0706e82 1883{
0c1ad2ca 1884 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 1885 struct ieee80211_local *local = sdata->local;
68542962 1886 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
d6f2da5b 1887
ae5eb026 1888 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 1889 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
50ae34a2 1890 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 1891
7ccc8bd7 1892 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
59c1ec2b 1893 beacon_loss_count * bss_conf->beacon_int));
7ccc8bd7 1894
0c1ad2ca
JB		 1895 sdata->u.mgd.associated = cbss;
1896 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 1897
17e4ec14
JM		 1898 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1899
488dd7b5 1900 if (sdata->vif.p2p) {
9caf0364 1901 const struct cfg80211_bss_ies *ies;
488dd7b5 1902
9caf0364
JB		 1903 rcu_read_lock();
1904 ies = rcu_dereference(cbss->ies);
1905 if (ies) {
9caf0364
JB		 1906 int ret;
1907
1908 ret = cfg80211_get_p2p_attr(
1909 ies->data, ies->len,
1910 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
67baf663
JD		 1911 (u8 *) &bss_conf->p2p_noa_attr,
1912 sizeof(bss_conf->p2p_noa_attr));
9caf0364 1913 if (ret >= 2) {
67baf663
JD		 1914 sdata->u.mgd.p2p_noa_index =
1915 bss_conf->p2p_noa_attr.index;
9caf0364 1916 bss_info_changed |= BSS_CHANGED_P2P_PS;
9caf0364 1917 }
488dd7b5 1918 }
9caf0364 1919 rcu_read_unlock();
488dd7b5
JB		 1920 }
1921
b291ba11 1922 /* just to be sure */
925e64c3 1923 ieee80211_stop_poll(sdata);
b291ba11 1924
9ac19a90 1925 ieee80211_led_assoc(local, 1);
9306102e 1926
989c6505 1927 if (sdata->u.mgd.have_beacon) {
826262c3
JB		 1928 /*
1929 * If the AP is buggy we may get here with no DTIM period
1930 * known, so assume it's 1 which is the only safe assumption
1931 * in that case, although if the TIM IE is broken powersave
1932 * probably just won't work at all.
1933 */
1934 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
817cee76 1935 bss_conf->beacon_rate = bss->beacon_rate;
989c6505 1936 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
826262c3 1937 } else {
817cee76 1938 bss_conf->beacon_rate = NULL;
e5b900d2 1939 bss_conf->dtim_period = 0;
826262c3 1940 }
e5b900d2 1941
68542962 1942 bss_conf->assoc = 1;
9cef8737 1943
a97c13c3 1944 /* Tell the driver to monitor connection quality (if supported) */
ea086359 1945 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
68542962 1946 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 1947 bss_info_changed |= BSS_CHANGED_CQM;
1948
68542962 1949 /* Enable ARP filtering */
0f19b41e 1950 if (bss_conf->arp_addr_cnt)
68542962 1951 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
68542962 1952
ae5eb026 1953 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 1954
056508dc
JB		 1955 mutex_lock(&local->iflist_mtx);
1956 ieee80211_recalc_ps(local, -1);
1957 mutex_unlock(&local->iflist_mtx);
e0cb686f 1958
04ecd257 1959 ieee80211_recalc_smps(sdata);
ab095877
EP		 1960 ieee80211_recalc_ps_vif(sdata);
1961
9ac19a90 1962 netif_carrier_on(sdata->dev);
f0706e82
JB		 1963}
1964
e69e95db 1965static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
37ad3888
JB		 1966 u16 stype, u16 reason, bool tx,
1967 u8 *frame_buf)
aa458d17 1968{
46900298 1969 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17 1970 struct ieee80211_local *local = sdata->local;
3cc5240b 1971 u32 changed = 0;
aa458d17 1972
8d61ffa5 1973 sdata_assert_lock(sdata);
77fdaa12 1974
37ad3888
JB		 1975 if (WARN_ON_ONCE(tx && !frame_buf))
1976 return;
1977
b291ba11
JB		 1978 if (WARN_ON(!ifmgd->associated))
1979 return;
1980
79543d8e
DS		 1981 ieee80211_stop_poll(sdata);
1982
77fdaa12 1983 ifmgd->associated = NULL;
aa458d17
TW		 1984 netif_carrier_off(sdata->dev);
1985
88bc40e8
EP		 1986 /*
1987 * if we want to get out of ps before disassoc (why?) we have
1988 * to do it before sending disassoc, as otherwise the null-packet
1989 * won't be valid.
1990 */
1991 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1992 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1993 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1994 }
1995 local->ps_sdata = NULL;
1996
ab095877
EP		 1997 /* disable per-vif ps */
1998 ieee80211_recalc_ps_vif(sdata);
1999
f823981e
EP		 2000 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
2001 if (tx)
39ecc01d 2002 ieee80211_flush_queues(local, sdata);
f823981e 2003
37ad3888
JB		 2004 /* deauthenticate/disassociate now */
2005 if (tx || frame_buf)
88a9e31c
EP		 2006 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
2007 reason, tx, frame_buf);
37ad3888
JB		 2008
2009 /* flush out frame */
2010 if (tx)
39ecc01d 2011 ieee80211_flush_queues(local, sdata);
37ad3888 2012
88a9e31c
EP		 2013 /* clear bssid only after building the needed mgmt frames */
2014 memset(ifmgd->bssid, 0, ETH_ALEN);
2015
37ad3888 2016 /* remove AP and TDLS peers */
d34ba216 2017 sta_info_flush(sdata);
37ad3888
JB		 2018
2019 /* finally reset all BSS / config parameters */
f5e5bf25
TW		 2020 changed |= ieee80211_reset_erp_info(sdata);
2021
f5e5bf25 2022 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 2023 changed |= BSS_CHANGED_ASSOC;
2024 sdata->vif.bss_conf.assoc = false;
f5e5bf25 2025
67baf663
JD		 2026 ifmgd->p2p_noa_index = -1;
2027 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
2028 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
488dd7b5 2029
dd5ecfea 2030 /* on the next assoc, re-program HT/VHT parameters */
ef96a842
BG		 2031 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
2032 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
dd5ecfea
JB		 2033 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
2034 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
413ad50a 2035
1ea6f9c0 2036 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
a8302de9 2037
520eb820
KV		 2038 del_timer_sync(&local->dynamic_ps_timer);
2039 cancel_work_sync(&local->dynamic_ps_enable_work);
2040
68542962 2041 /* Disable ARP filtering */
0f19b41e 2042 if (sdata->vif.bss_conf.arp_addr_cnt)
68542962 2043 changed |= BSS_CHANGED_ARP_FILTER;
68542962 2044
3abead59
JB		 2045 sdata->vif.bss_conf.qos = false;
2046 changed |= BSS_CHANGED_QOS;
2047
0aaffa9b
JB		 2048 /* The BSSID (not really interesting) and HT changed */
2049 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 2050 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 2051
3abead59
JB		 2052 /* disassociated - set to defaults now */
2053 ieee80211_set_wmm_default(sdata, false);
2054
b9dcf712
JB		 2055 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
2056 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
2057 del_timer_sync(&sdata->u.mgd.timer);
2058 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2d9957cc 2059
826262c3 2060 sdata->vif.bss_conf.dtim_period = 0;
817cee76
AB		 2061 sdata->vif.bss_conf.beacon_rate = NULL;
2062
989c6505 2063 ifmgd->have_beacon = false;
826262c3 2064
028e8da0 2065 ifmgd->flags = 0;
34a3740d 2066 mutex_lock(&local->mtx);
028e8da0 2067 ieee80211_vif_release_channel(sdata);
59af6928
MK		 2068
2069 sdata->vif.csa_active = false;
0c21e632 2070 ifmgd->csa_waiting_bcn = false;
a46992b4
LC		 2071 if (sdata->csa_block_tx) {
2072 ieee80211_wake_vif_queues(local, sdata,
2073 IEEE80211_QUEUE_STOP_REASON_CSA);
2074 sdata->csa_block_tx = false;
2075 }
34a3740d 2076 mutex_unlock(&local->mtx);
2475b1cc 2077
02219b3a
JB		 2078 /* existing TX TSPEC sessions no longer exist */
2079 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
2080 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
2081
2475b1cc 2082 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
aa458d17 2083}
f0706e82 2084
3cf335d5
KV		 2085void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
2086 struct ieee80211_hdr *hdr)
2087{
2088 /*
2089 * We can postpone the mgd.timer whenever receiving unicast frames
2090 * from AP because we know that the connection is working both ways
2091 * at that time. But multicast frames (and hence also beacons) must
2092 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 2093 * data idle periods for sending the periodic probe request to the
2094 * AP we're connected to.
3cf335d5 2095 */
b291ba11
JB		 2096 if (is_multicast_ether_addr(hdr->addr1))
2097 return;
2098
be099e82 2099 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 2100}
f0706e82 2101
4e5ff376
FF		 2102static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
2103{
2104 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
133d40f9 2105 struct ieee80211_local *local = sdata->local;
4e5ff376 2106
133d40f9 2107 mutex_lock(&local->mtx);
392b9ffb
SG		 2108 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
2109 goto out;
4e5ff376 2110
925e64c3 2111 __ieee80211_stop_poll(sdata);
133d40f9
SG		 2112
2113 mutex_lock(&local->iflist_mtx);
2114 ieee80211_recalc_ps(local, -1);
2115 mutex_unlock(&local->iflist_mtx);
4e5ff376
FF		 2116
2117 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
133d40f9 2118 goto out;
4e5ff376
FF		 2119
2120 /*
2121 * We've received a probe response, but are not sure whether
2122 * we have or will be receiving any beacons or data, so let's
2123 * schedule the timers again, just in case.
2124 */
2125 ieee80211_sta_reset_beacon_monitor(sdata);
2126
2127 mod_timer(&ifmgd->conn_mon_timer,
2128 round_jiffies_up(jiffies +
2129 IEEE80211_CONNECTION_IDLE_TIME));
133d40f9 2130out:
133d40f9 2131 mutex_unlock(&local->mtx);
4e5ff376
FF		 2132}
2133
02219b3a
JB		 2134static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
2135 struct ieee80211_hdr *hdr,
2136 u16 tx_time)
2137{
2138 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2139 u16 tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
2140 int ac = ieee80211_ac_from_tid(tid);
2141 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
2142 unsigned long now = jiffies;
2143
2144 if (likely(!tx_tspec->admitted_time))
2145 return;
2146
2147 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2148 tx_tspec->consumed_tx_time = 0;
2149 tx_tspec->time_slice_start = now;
2150
2151 if (tx_tspec->downgraded) {
2152 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
2153 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2154 }
2155 }
2156
2157 if (tx_tspec->downgraded)
2158 return;
2159
2160 tx_tspec->consumed_tx_time += tx_time;
2161
2162 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
2163 tx_tspec->downgraded = true;
2164 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
2165 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2166 }
2167}
2168
4e5ff376 2169void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
02219b3a 2170 struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
4e5ff376 2171{
02219b3a
JB		 2172 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
2173
75706d0e 2174 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF		 2175 return;
2176
4e5ff376
FF		 2177 if (ieee80211_is_nullfunc(hdr->frame_control) &&
2178 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e 2179 if (ack)
cab1c7fd 2180 ieee80211_sta_reset_conn_monitor(sdata);
04ac3c0e
FF		 2181 else
2182 sdata->u.mgd.nullfunc_failed = true;
4e5ff376 2183 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
cab1c7fd 2184 return;
4e5ff376 2185 }
cab1c7fd
WD		 2186
2187 if (ack)
2188 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF		 2189}
2190
a43abf29
ML		 2191static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2192{
2193 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2194 const u8 *ssid;
f01a067d 2195 u8 *dst = ifmgd->associated->bssid;
180205bd 2196 u8 unicast_limit = max(1, max_probe_tries - 3);
f01a067d
LR		 2197
2198 /*
2199 * Try sending broadcast probe requests for the last three
2200 * probe requests after the first ones failed since some
2201 * buggy APs only support broadcast probe requests.
2202 */
2203 if (ifmgd->probe_send_count >= unicast_limit)
2204 dst = NULL;
a43abf29 2205
4e5ff376
FF		 2206 /*
2207 * When the hardware reports an accurate Tx ACK status, it's
2208 * better to send a nullfunc frame instead of a probe request,
2209 * as it will kick us off the AP quickly if we aren't associated
2210 * anymore. The timeout will be reset if the frame is ACKed by
2211 * the AP.
2212 */
992e68bf
SD		 2213 ifmgd->probe_send_count++;
2214
04ac3c0e
FF		 2215 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2216 ifmgd->nullfunc_failed = false;
4e5ff376 2217 ieee80211_send_nullfunc(sdata->local, sdata, 0);
04ac3c0e 2218 } else {
88c868c4
SG		 2219 int ssid_len;
2220
9caf0364 2221 rcu_read_lock();
4e5ff376 2222 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
88c868c4
SG		 2223 if (WARN_ON_ONCE(ssid == NULL))
2224 ssid_len = 0;
2225 else
2226 ssid_len = ssid[1];
2227
2228 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
1672c0e3 2229 0, (u32) -1, true, 0,
55de908a 2230 ifmgd->associated->channel, false);
9caf0364 2231 rcu_read_unlock();
4e5ff376 2232 }
a43abf29 2233
180205bd 2234 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
8d61ffa5 2235 run_again(sdata, ifmgd->probe_timeout);
a43abf29
ML		 2236}
2237
b291ba11
JB		 2238static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2239 bool beacon)
04de8381 2240{
04de8381 2241 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 2242 bool already = false;
34bfc411 2243
9607e6b6 2244 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 2245 return;
2246
8d61ffa5 2247 sdata_lock(sdata);
77fdaa12
JB		 2248
2249 if (!ifmgd->associated)
2250 goto out;
2251
133d40f9
SG		 2252 mutex_lock(&sdata->local->mtx);
2253
2254 if (sdata->local->tmp_channel || sdata->local->scanning) {
2255 mutex_unlock(&sdata->local->mtx);
2256 goto out;
2257 }
2258
a13fbe54 2259 if (beacon) {
bdcbd8e0 2260 mlme_dbg_ratelimited(sdata,
59c1ec2b
BG		 2261 "detected beacon loss from AP (missed %d beacons) - probing\n",
2262 beacon_loss_count);
bdcbd8e0 2263
a13fbe54
BG		 2264 ieee80211_cqm_rssi_notify(&sdata->vif,
2265 NL80211_CQM_RSSI_BEACON_LOSS_EVENT,
2266 GFP_KERNEL);
2267 }
04de8381 2268
b291ba11
JB		 2269 /*
2270 * The driver/our work has already reported this event or the
2271 * connection monitoring has kicked in and we have already sent
2272 * a probe request. Or maybe the AP died and the driver keeps
2273 * reporting until we disassociate...
2274 *
2275 * In either case we have to ignore the current call to this
2276 * function (except for setting the correct probe reason bit)
2277 * because otherwise we would reset the timer every time and
2278 * never check whether we received a probe response!
2279 */
392b9ffb 2280 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
b291ba11
JB		 2281 already = true;
2282
12b5f34d
EP		 2283 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2284
133d40f9
SG		 2285 mutex_unlock(&sdata->local->mtx);
2286
b291ba11
JB		 2287 if (already)
2288 goto out;
2289
4e751843
JB		 2290 mutex_lock(&sdata->local->iflist_mtx);
2291 ieee80211_recalc_ps(sdata->local, -1);
2292 mutex_unlock(&sdata->local->iflist_mtx);
2293
a43abf29
ML		 2294 ifmgd->probe_send_count = 0;
2295 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12 2296 out:
8d61ffa5 2297 sdata_unlock(sdata);
04de8381
KV		 2298}
2299
a619a4c0
JO		 2300struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2301 struct ieee80211_vif *vif)
2302{
2303 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2304 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d9b3b28b 2305 struct cfg80211_bss *cbss;
a619a4c0
JO		 2306 struct sk_buff *skb;
2307 const u8 *ssid;
88c868c4 2308 int ssid_len;
a619a4c0
JO		 2309
2310 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2311 return NULL;
2312
8d61ffa5 2313 sdata_assert_lock(sdata);
a619a4c0 2314
d9b3b28b
EP		 2315 if (ifmgd->associated)
2316 cbss = ifmgd->associated;
2317 else if (ifmgd->auth_data)
2318 cbss = ifmgd->auth_data->bss;
2319 else if (ifmgd->assoc_data)
2320 cbss = ifmgd->assoc_data->bss;
2321 else
a619a4c0
JO		 2322 return NULL;
2323
9caf0364 2324 rcu_read_lock();
d9b3b28b 2325 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
88c868c4
SG		 2326 if (WARN_ON_ONCE(ssid == NULL))
2327 ssid_len = 0;
2328 else
2329 ssid_len = ssid[1];
2330
d9b3b28b 2331 skb = ieee80211_build_probe_req(sdata, cbss->bssid,
55de908a 2332 (u32) -1, cbss->channel,
6b77863b 2333 ssid + 2, ssid_len,
85a237fe 2334 NULL, 0, true);
9caf0364 2335 rcu_read_unlock();
a619a4c0
JO		 2336
2337 return skb;
2338}
2339EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2340
eef9e54c 2341static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
1e4dcd01 2342{
59af6928 2343 struct ieee80211_local *local = sdata->local;
1e4dcd01 2344 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 2345 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
1e4dcd01 2346
8d61ffa5 2347 sdata_lock(sdata);
1e4dcd01 2348 if (!ifmgd->associated) {
8d61ffa5 2349 sdata_unlock(sdata);
1e4dcd01
JO		 2350 return;
2351 }
2352
37ad3888
JB		 2353 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2354 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
eef9e54c 2355 true, frame_buf);
59af6928 2356 mutex_lock(&local->mtx);
7578d575 2357 sdata->vif.csa_active = false;
0c21e632 2358 ifmgd->csa_waiting_bcn = false;
a46992b4
LC		 2359 if (sdata->csa_block_tx) {
2360 ieee80211_wake_vif_queues(local, sdata,
2361 IEEE80211_QUEUE_STOP_REASON_CSA);
2362 sdata->csa_block_tx = false;
2363 }
59af6928 2364 mutex_unlock(&local->mtx);
7da7cc1d 2365
6ff57cf8
JB		 2366 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
2367 IEEE80211_DEAUTH_FRAME_LEN);
8d61ffa5 2368 sdata_unlock(sdata);
1e4dcd01
JO		 2369}
2370
cc74c0c7 2371static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 2372{
2373 struct ieee80211_sub_if_data *sdata =
2374 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 2375 u.mgd.beacon_connection_loss_work);
a85e1d55
PS		 2376 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2377 struct sta_info *sta;
2378
2379 if (ifmgd->associated) {
30fa9047 2380 rcu_read_lock();
a85e1d55
PS		 2381 sta = sta_info_get(sdata, ifmgd->bssid);
2382 if (sta)
2383 sta->beacon_loss_count++;
30fa9047 2384 rcu_read_unlock();
a85e1d55 2385 }
b291ba11 2386
682bd38b 2387 if (ifmgd->connection_loss) {
882a7c69
JB		 2388 sdata_info(sdata, "Connection to AP %pM lost\n",
2389 ifmgd->bssid);
eef9e54c 2390 __ieee80211_disconnect(sdata);
882a7c69 2391 } else {
1e4dcd01 2392 ieee80211_mgd_probe_ap(sdata, true);
882a7c69
JB		 2393 }
2394}
2395
2396static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2397{
2398 struct ieee80211_sub_if_data *sdata =
2399 container_of(work, struct ieee80211_sub_if_data,
2400 u.mgd.csa_connection_drop_work);
2401
eef9e54c 2402 __ieee80211_disconnect(sdata);
b291ba11
JB		 2403}
2404
04de8381
KV		 2405void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2406{
2407 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 2408 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 2409
b5878a2d
JB		 2410 trace_api_beacon_loss(sdata);
2411
682bd38b 2412 sdata->u.mgd.connection_loss = false;
1e4dcd01 2413 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 2414}
2415EXPORT_SYMBOL(ieee80211_beacon_loss);
2416
1e4dcd01
JO		 2417void ieee80211_connection_loss(struct ieee80211_vif *vif)
2418{
2419 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2420 struct ieee80211_hw *hw = &sdata->local->hw;
2421
b5878a2d
JB		 2422 trace_api_connection_loss(sdata);
2423
682bd38b 2424 sdata->u.mgd.connection_loss = true;
1e4dcd01
JO		 2425 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2426}
2427EXPORT_SYMBOL(ieee80211_connection_loss);
2428
2429
66e67e41
JB		 2430static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2431 bool assoc)
2432{
2433 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2434
8d61ffa5 2435 sdata_assert_lock(sdata);
66e67e41 2436
66e67e41
JB		 2437 if (!assoc) {
2438 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2439
2440 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2441 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
028e8da0 2442 sdata->u.mgd.flags = 0;
34a3740d 2443 mutex_lock(&sdata->local->mtx);
55de908a 2444 ieee80211_vif_release_channel(sdata);
34a3740d 2445 mutex_unlock(&sdata->local->mtx);
66e67e41
JB		 2446 }
2447
5b112d3d 2448 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
66e67e41
JB		 2449 kfree(auth_data);
2450 sdata->u.mgd.auth_data = NULL;
2451}
2452
2453static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2454 struct ieee80211_mgmt *mgmt, size_t len)
2455{
1672c0e3 2456 struct ieee80211_local *local = sdata->local;
66e67e41
JB		 2457 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2458 u8 *pos;
2459 struct ieee802_11_elems elems;
1672c0e3 2460 u32 tx_flags = 0;
66e67e41
JB		 2461
2462 pos = mgmt->u.auth.variable;
b2e506bf 2463 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
66e67e41
JB		 2464 if (!elems.challenge)
2465 return;
2466 auth_data->expected_transaction = 4;
a1845fc7 2467 drv_mgd_prepare_tx(sdata->local, sdata);
1672c0e3
JB		 2468 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2469 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2470 IEEE80211_TX_INTFL_MLME_CONN_TX;
700e8ea6 2471 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
66e67e41
JB		 2472 elems.challenge - 2, elems.challenge_len + 2,
2473 auth_data->bss->bssid, auth_data->bss->bssid,
2474 auth_data->key, auth_data->key_len,
1672c0e3 2475 auth_data->key_idx, tx_flags);
66e67e41
JB		 2476}
2477
8d61ffa5
JB		 2478static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2479 struct ieee80211_mgmt *mgmt, size_t len)
66e67e41
JB		 2480{
2481 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2482 u8 bssid[ETH_ALEN];
2483 u16 auth_alg, auth_transaction, status_code;
2484 struct sta_info *sta;
2485
8d61ffa5 2486 sdata_assert_lock(sdata);
66e67e41
JB		 2487
2488 if (len < 24 + 6)
8d61ffa5 2489 return;
66e67e41
JB		 2490
2491 if (!ifmgd->auth_data || ifmgd->auth_data->done)
8d61ffa5 2492 return;
66e67e41
JB		 2493
2494 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2495
b203ca39 2496 if (!ether_addr_equal(bssid, mgmt->bssid))
8d61ffa5 2497 return;
66e67e41
JB		 2498
2499 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2500 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2501 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2502
2503 if (auth_alg != ifmgd->auth_data->algorithm ||
0f4126e8
JM		 2504 auth_transaction != ifmgd->auth_data->expected_transaction) {
2505 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2506 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2507 auth_transaction,
2508 ifmgd->auth_data->expected_transaction);
8d61ffa5 2509 return;
0f4126e8 2510 }
66e67e41
JB		 2511
2512 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2513 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2514 mgmt->sa, status_code);
dac211ec 2515 ieee80211_destroy_auth_data(sdata, false);
6ff57cf8 2516 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
8d61ffa5 2517 return;
66e67e41
JB		 2518 }
2519
2520 switch (ifmgd->auth_data->algorithm) {
2521 case WLAN_AUTH_OPEN:
2522 case WLAN_AUTH_LEAP:
2523 case WLAN_AUTH_FT:
6b8ece3a 2524 case WLAN_AUTH_SAE:
66e67e41
JB		 2525 break;
2526 case WLAN_AUTH_SHARED_KEY:
2527 if (ifmgd->auth_data->expected_transaction != 4) {
2528 ieee80211_auth_challenge(sdata, mgmt, len);
2529 /* need another frame */
8d61ffa5 2530 return;
66e67e41
JB		 2531 }
2532 break;
2533 default:
2534 WARN_ONCE(1, "invalid auth alg %d",
2535 ifmgd->auth_data->algorithm);
8d61ffa5 2536 return;
66e67e41
JB		 2537 }
2538
bdcbd8e0 2539 sdata_info(sdata, "authenticated\n");
66e67e41
JB		 2540 ifmgd->auth_data->done = true;
2541 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
89afe614 2542 ifmgd->auth_data->timeout_started = true;
8d61ffa5 2543 run_again(sdata, ifmgd->auth_data->timeout);
66e67e41 2544
6b8ece3a
JM		 2545 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2546 ifmgd->auth_data->expected_transaction != 2) {
2547 /*
2548 * Report auth frame to user space for processing since another
2549 * round of Authentication frames is still needed.
2550 */
6ff57cf8 2551 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
8d61ffa5 2552 return;
6b8ece3a
JM		 2553 }
2554
66e67e41
JB		 2555 /* move station state to auth */
2556 mutex_lock(&sdata->local->sta_mtx);
2557 sta = sta_info_get(sdata, bssid);
2558 if (!sta) {
2559 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2560 goto out_err;
2561 }
2562 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
bdcbd8e0 2563 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
66e67e41
JB		 2564 goto out_err;
2565 }
2566 mutex_unlock(&sdata->local->sta_mtx);
2567
6ff57cf8 2568 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
8d61ffa5 2569 return;
66e67e41
JB		 2570 out_err:
2571 mutex_unlock(&sdata->local->sta_mtx);
2572 /* ignore frame -- wait for timeout */
66e67e41
JB		 2573}
2574
dfa1ad29
CO		 2575#define case_WLAN(type) \
2576 case WLAN_REASON_##type: return #type
2577
2578static const char *ieee80211_get_reason_code_string(u16 reason_code)
2579{
2580 switch (reason_code) {
2581 case_WLAN(UNSPECIFIED);
2582 case_WLAN(PREV_AUTH_NOT_VALID);
2583 case_WLAN(DEAUTH_LEAVING);
2584 case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2585 case_WLAN(DISASSOC_AP_BUSY);
2586 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2587 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2588 case_WLAN(DISASSOC_STA_HAS_LEFT);
2589 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2590 case_WLAN(DISASSOC_BAD_POWER);
2591 case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2592 case_WLAN(INVALID_IE);
2593 case_WLAN(MIC_FAILURE);
2594 case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2595 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2596 case_WLAN(IE_DIFFERENT);
2597 case_WLAN(INVALID_GROUP_CIPHER);
2598 case_WLAN(INVALID_PAIRWISE_CIPHER);
2599 case_WLAN(INVALID_AKMP);
2600 case_WLAN(UNSUPP_RSN_VERSION);
2601 case_WLAN(INVALID_RSN_IE_CAP);
2602 case_WLAN(IEEE8021X_FAILED);
2603 case_WLAN(CIPHER_SUITE_REJECTED);
2604 case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2605 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2606 case_WLAN(DISASSOC_LOW_ACK);
2607 case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2608 case_WLAN(QSTA_LEAVE_QBSS);
2609 case_WLAN(QSTA_NOT_USE);
2610 case_WLAN(QSTA_REQUIRE_SETUP);
2611 case_WLAN(QSTA_TIMEOUT);
2612 case_WLAN(QSTA_CIPHER_NOT_SUPP);
2613 case_WLAN(MESH_PEER_CANCELED);
2614 case_WLAN(MESH_MAX_PEERS);
2615 case_WLAN(MESH_CONFIG);
2616 case_WLAN(MESH_CLOSE);
2617 case_WLAN(MESH_MAX_RETRIES);
2618 case_WLAN(MESH_CONFIRM_TIMEOUT);
2619 case_WLAN(MESH_INVALID_GTK);
2620 case_WLAN(MESH_INCONSISTENT_PARAM);
2621 case_WLAN(MESH_INVALID_SECURITY);
2622 case_WLAN(MESH_PATH_ERROR);
2623 case_WLAN(MESH_PATH_NOFORWARD);
2624 case_WLAN(MESH_PATH_DEST_UNREACHABLE);
2625 case_WLAN(MAC_EXISTS_IN_MBSS);
2626 case_WLAN(MESH_CHAN_REGULATORY);
2627 case_WLAN(MESH_CHAN);
2628 default: return "<unknown>";
2629 }
2630}
66e67e41 2631
8d61ffa5
JB		 2632static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2633 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2634{
46900298 2635 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 2636 const u8 *bssid = NULL;
f0706e82
JB		 2637 u16 reason_code;
2638
8d61ffa5 2639 sdata_assert_lock(sdata);
66e67e41 2640
f4ea83dd 2641 if (len < 24 + 2)
8d61ffa5 2642 return;
f0706e82 2643
66e67e41 2644 if (!ifmgd->associated ||
b203ca39 2645 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
8d61ffa5 2646 return;
77fdaa12 2647
0c1ad2ca 2648 bssid = ifmgd->associated->bssid;
f0706e82
JB		 2649
2650 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2651
dfa1ad29
CO		 2652 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
2653 bssid, reason_code, ieee80211_get_reason_code_string(reason_code));
77fdaa12 2654
37ad3888
JB		 2655 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2656
6ff57cf8 2657 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
f0706e82
JB		 2658}
2659
2660
8d61ffa5
JB		 2661static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2662 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2663{
46900298 2664 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 2665 u16 reason_code;
2666
8d61ffa5 2667 sdata_assert_lock(sdata);
77fdaa12 2668
66e67e41 2669 if (len < 24 + 2)
8d61ffa5 2670 return;
77fdaa12 2671
66e67e41 2672 if (!ifmgd->associated ||
b203ca39 2673 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
8d61ffa5 2674 return;
f0706e82
JB		 2675
2676 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2677
bdcbd8e0
JB		 2678 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2679 mgmt->sa, reason_code);
f0706e82 2680
37ad3888
JB		 2681 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2682
6ff57cf8 2683 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
f0706e82
JB		 2684}
2685
c74d084f
CL		 2686static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2687 u8 *supp_rates, unsigned int supp_rates_len,
2688 u32 *rates, u32 *basic_rates,
2689 bool *have_higher_than_11mbit,
2103dec1
SW		 2690 int *min_rate, int *min_rate_index,
2691 int shift, u32 rate_flags)
c74d084f
CL		 2692{
2693 int i, j;
2694
2695 for (i = 0; i < supp_rates_len; i++) {
2103dec1 2696 int rate = supp_rates[i] & 0x7f;
c74d084f
CL		 2697 bool is_basic = !!(supp_rates[i] & 0x80);
2698
2103dec1 2699 if ((rate * 5 * (1 << shift)) > 110)
c74d084f
CL		 2700 *have_higher_than_11mbit = true;
2701
2702 /*
2703 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2704 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2705 *
2706 * Note: Even through the membership selector and the basic
2707 * rate flag share the same bit, they are not exactly
2708 * the same.
2709 */
2710 if (!!(supp_rates[i] & 0x80) &&
2711 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2712 continue;
2713
2714 for (j = 0; j < sband->n_bitrates; j++) {
2103dec1
SW		 2715 struct ieee80211_rate *br;
2716 int brate;
2717
2718 br = &sband->bitrates[j];
2719 if ((rate_flags & br->flags) != rate_flags)
2720 continue;
2721
2722 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2723 if (brate == rate) {
c74d084f
CL		 2724 *rates |= BIT(j);
2725 if (is_basic)
2726 *basic_rates |= BIT(j);
2103dec1
SW		 2727 if ((rate * 5) < *min_rate) {
2728 *min_rate = rate * 5;
c74d084f
CL		 2729 *min_rate_index = j;
2730 }
2731 break;
2732 }
2733 }
2734 }
2735}
f0706e82 2736
66e67e41
JB		 2737static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2738 bool assoc)
2739{
2740 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2741
8d61ffa5 2742 sdata_assert_lock(sdata);
66e67e41 2743
66e67e41
JB		 2744 if (!assoc) {
2745 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2746
2747 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2748 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
028e8da0 2749 sdata->u.mgd.flags = 0;
34a3740d 2750 mutex_lock(&sdata->local->mtx);
55de908a 2751 ieee80211_vif_release_channel(sdata);
34a3740d 2752 mutex_unlock(&sdata->local->mtx);
66e67e41
JB		 2753 }
2754
2755 kfree(assoc_data);
2756 sdata->u.mgd.assoc_data = NULL;
2757}
2758
2759static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2760 struct cfg80211_bss *cbss,
af6b6374 2761 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2762{
46900298 2763 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 2764 struct ieee80211_local *local = sdata->local;
8318d78a 2765 struct ieee80211_supported_band *sband;
f0706e82 2766 struct sta_info *sta;
af6b6374 2767 u8 *pos;
af6b6374 2768 u16 capab_info, aid;
f0706e82 2769 struct ieee802_11_elems elems;
bda3933a 2770 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
35d865af
JB		 2771 const struct cfg80211_bss_ies *bss_ies = NULL;
2772 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
ae5eb026 2773 u32 changed = 0;
c74d084f 2774 int err;
35d865af 2775 bool ret;
f0706e82 2776
af6b6374 2777 /* AssocResp and ReassocResp have identical structure */
f0706e82 2778
f0706e82 2779 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 2780 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 2781
1dd84aa2 2782 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
bdcbd8e0
JB		 2783 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2784 aid);
1dd84aa2
JB		 2785 aid &= ~(BIT(15) | BIT(14));
2786
05cb9108
JB		 2787 ifmgd->broken_ap = false;
2788
2789 if (aid == 0 || aid > IEEE80211_MAX_AID) {
bdcbd8e0
JB		 2790 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2791 aid);
05cb9108
JB		 2792 aid = 0;
2793 ifmgd->broken_ap = true;
2794 }
2795
af6b6374 2796 pos = mgmt->u.assoc_resp.variable;
b2e506bf 2797 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
af6b6374 2798
f0706e82 2799 if (!elems.supp_rates) {
bdcbd8e0 2800 sdata_info(sdata, "no SuppRates element in AssocResp\n");
af6b6374 2801 return false;
f0706e82
JB		 2802 }
2803
46900298 2804 ifmgd->aid = aid;
9041c1fa
AN		 2805 ifmgd->tdls_chan_switch_prohibited =
2806 elems.ext_capab && elems.ext_capab_len >= 5 &&
2807 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
f0706e82 2808
35d865af
JB		 2809 /*
2810 * Some APs are erroneously not including some information in their
2811 * (re)association response frames. Try to recover by using the data
2812 * from the beacon or probe response. This seems to afflict mobile
2813 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2814 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2815 */
2816 if ((assoc_data->wmm && !elems.wmm_param) ||
2817 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2818 (!elems.ht_cap_elem || !elems.ht_operation)) ||
2819 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2820 (!elems.vht_cap_elem || !elems.vht_operation))) {
2821 const struct cfg80211_bss_ies *ies;
2822 struct ieee802_11_elems bss_elems;
2823
2824 rcu_read_lock();
2825 ies = rcu_dereference(cbss->ies);
2826 if (ies)
2827 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2828 GFP_ATOMIC);
2829 rcu_read_unlock();
2830 if (!bss_ies)
2831 return false;
2832
2833 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2834 false, &bss_elems);
2835 if (assoc_data->wmm &&
2836 !elems.wmm_param && bss_elems.wmm_param) {
2837 elems.wmm_param = bss_elems.wmm_param;
2838 sdata_info(sdata,
2839 "AP bug: WMM param missing from AssocResp\n");
2840 }
2841
2842 /*
2843 * Also check if we requested HT/VHT, otherwise the AP doesn't
2844 * have to include the IEs in the (re)association response.
2845 */
2846 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2847 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2848 elems.ht_cap_elem = bss_elems.ht_cap_elem;
2849 sdata_info(sdata,
2850 "AP bug: HT capability missing from AssocResp\n");
2851 }
2852 if (!elems.ht_operation && bss_elems.ht_operation &&
2853 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2854 elems.ht_operation = bss_elems.ht_operation;
2855 sdata_info(sdata,
2856 "AP bug: HT operation missing from AssocResp\n");
2857 }
2858 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2859 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2860 elems.vht_cap_elem = bss_elems.vht_cap_elem;
2861 sdata_info(sdata,
2862 "AP bug: VHT capa missing from AssocResp\n");
2863 }
2864 if (!elems.vht_operation && bss_elems.vht_operation &&
2865 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2866 elems.vht_operation = bss_elems.vht_operation;
2867 sdata_info(sdata,
2868 "AP bug: VHT operation missing from AssocResp\n");
2869 }
2870 }
2871
30eb1dc2
JB		 2872 /*
2873 * We previously checked these in the beacon/probe response, so
2874 * they should be present here. This is just a safety net.
2875 */
2876 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2877 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2878 sdata_info(sdata,
35d865af
JB		 2879 "HT AP is missing WMM params or HT capability/operation\n");
2880 ret = false;
2881 goto out;
30eb1dc2
JB		 2882 }
2883
2884 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2885 (!elems.vht_cap_elem || !elems.vht_operation)) {
2886 sdata_info(sdata,
35d865af
JB		 2887 "VHT AP is missing VHT capability/operation\n");
2888 ret = false;
2889 goto out;
30eb1dc2
JB		 2890 }
2891
2a33bee2
GE		 2892 mutex_lock(&sdata->local->sta_mtx);
2893 /*
2894 * station info was already allocated and inserted before
2895 * the association and should be available to us
2896 */
7852e361 2897 sta = sta_info_get(sdata, cbss->bssid);
2a33bee2
GE		 2898 if (WARN_ON(!sta)) {
2899 mutex_unlock(&sdata->local->sta_mtx);
35d865af
JB		 2900 ret = false;
2901 goto out;
77fdaa12 2902 }
05e5e883 2903
55de908a 2904 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
f709fc69 2905
30eb1dc2 2906 /* Set up internal HT/VHT capabilities */
a8243b72 2907 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
ef96a842 2908 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
e1a0c6b3 2909 elems.ht_cap_elem, sta);
64f68e5d 2910
818255ea
MP		 2911 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2912 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
4a34215e 2913 elems.vht_cap_elem, sta);
818255ea 2914
30eb1dc2
JB		 2915 /*
2916 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
2917 * in their association response, so ignore that data for our own
2918 * configuration. If it changed since the last beacon, we'll get the
2919 * next beacon and update then.
2920 */
1128958d 2921
bee7f586
JB		 2922 /*
2923 * If an operating mode notification IE is present, override the
2924 * NSS calculation (that would be done in rate_control_rate_init())
2925 * and use the # of streams from that element.
2926 */
2927 if (elems.opmode_notif &&
2928 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
2929 u8 nss;
2930
2931 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
2932 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
2933 nss += 1;
2934 sta->sta.rx_nss = nss;
2935 }
2936
4b7679a5 2937 rate_control_rate_init(sta);
f0706e82 2938
46900298 2939 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
c2c98fde 2940 set_sta_flag(sta, WLAN_STA_MFP);
5394af4d 2941
a74a8c84 2942 sta->sta.wme = elems.wmm_param;
ddf4ac53 2943
3e4d40fa 2944 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
c8987876
JB		 2945 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2946 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2947 if (err) {
bdcbd8e0
JB		 2948 sdata_info(sdata,
2949 "failed to move station %pM to desired state\n",
2950 sta->sta.addr);
c8987876
JB		 2951 WARN_ON(__sta_info_destroy(sta));
2952 mutex_unlock(&sdata->local->sta_mtx);
35d865af
JB		 2953 ret = false;
2954 goto out;
c8987876
JB		 2955 }
2956
7852e361 2957 mutex_unlock(&sdata->local->sta_mtx);
ddf4ac53 2958
f2176d72
JO		 2959 /*
2960 * Always handle WMM once after association regardless
2961 * of the first value the AP uses. Setting -1 here has
2962 * that effect because the AP values is an unsigned
2963 * 4-bit value.
2964 */
2965 ifmgd->wmm_last_param_set = -1;
2966
095d81ce 2967 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && elems.wmm_param)
4ced3f74 2968 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 2969 elems.wmm_param_len);
aa837e1d 2970 else
3abead59
JB		 2971 ieee80211_set_wmm_default(sdata, false);
2972 changed |= BSS_CHANGED_QOS;
f0706e82 2973
60f8b39c
JB		 2974 /* set AID and assoc capability,
2975 * ieee80211_set_associated() will tell the driver */
2976 bss_conf->aid = aid;
2977 bss_conf->assoc_capability = capab_info;
0c1ad2ca 2978 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 2979
d524215f
FF		 2980 /*
2981 * If we're using 4-addr mode, let the AP know that we're
2982 * doing so, so that it can create the STA VLAN on its side
2983 */
2984 if (ifmgd->use_4addr)
2985 ieee80211_send_4addr_nullfunc(local, sdata);
2986
15b7b062 2987 /*
b291ba11
JB		 2988 * Start timer to probe the connection to the AP now.
2989 * Also start the timer that will detect beacon loss.
15b7b062 2990 */
b291ba11 2991 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 2992 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 2993
35d865af
JB		 2994 ret = true;
2995 out:
2996 kfree(bss_ies);
2997 return ret;
f0706e82
JB		 2998}
2999
8d61ffa5
JB		 3000static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
3001 struct ieee80211_mgmt *mgmt,
3002 size_t len)
66e67e41
JB		 3003{
3004 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3005 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3006 u16 capab_info, status_code, aid;
3007 struct ieee802_11_elems elems;
b0b6aa2c 3008 int ac, uapsd_queues = -1;
66e67e41
JB		 3009 u8 *pos;
3010 bool reassoc;
8d61ffa5 3011 struct cfg80211_bss *bss;
66e67e41 3012
8d61ffa5 3013 sdata_assert_lock(sdata);
66e67e41
JB		 3014
3015 if (!assoc_data)
8d61ffa5 3016 return;
b203ca39 3017 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
8d61ffa5 3018 return;
66e67e41
JB		 3019
3020 /*
3021 * AssocResp and ReassocResp have identical structure, so process both
3022 * of them in this function.
3023 */
3024
3025 if (len < 24 + 6)
8d61ffa5 3026 return;
66e67e41
JB		 3027
3028 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
3029 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3030 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
3031 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3032
bdcbd8e0
JB		 3033 sdata_info(sdata,
3034 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3035 reassoc ? "Rea" : "A", mgmt->sa,
3036 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
66e67e41
JB		 3037
3038 pos = mgmt->u.assoc_resp.variable;
b2e506bf 3039 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
66e67e41
JB		 3040
3041 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
79ba1d89
JB		 3042 elems.timeout_int &&
3043 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
66e67e41 3044 u32 tu, ms;
79ba1d89 3045 tu = le32_to_cpu(elems.timeout_int->value);
66e67e41 3046 ms = tu * 1024 / 1000;
bdcbd8e0
JB		 3047 sdata_info(sdata,
3048 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3049 mgmt->sa, tu, ms);
66e67e41 3050 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
89afe614 3051 assoc_data->timeout_started = true;
66e67e41 3052 if (ms > IEEE80211_ASSOC_TIMEOUT)
8d61ffa5
JB		 3053 run_again(sdata, assoc_data->timeout);
3054 return;
66e67e41
JB		 3055 }
3056
8d61ffa5 3057 bss = assoc_data->bss;
66e67e41
JB		 3058
3059 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 3060 sdata_info(sdata, "%pM denied association (code=%d)\n",
3061 mgmt->sa, status_code);
66e67e41
JB		 3062 ieee80211_destroy_assoc_data(sdata, false);
3063 } else {
8d61ffa5 3064 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
66e67e41 3065 /* oops -- internal error -- send timeout for now */
10a9109f 3066 ieee80211_destroy_assoc_data(sdata, false);
959867fa 3067 cfg80211_assoc_timeout(sdata->dev, bss);
8d61ffa5 3068 return;
66e67e41 3069 }
635d999f 3070 sdata_info(sdata, "associated\n");
79ebfb85
JB		 3071
3072 /*
3073 * destroy assoc_data afterwards, as otherwise an idle
3074 * recalc after assoc_data is NULL but before associated
3075 * is set can cause the interface to go idle
3076 */
3077 ieee80211_destroy_assoc_data(sdata, true);
b0b6aa2c
EP		 3078
3079 /* get uapsd queues configuration */
3080 uapsd_queues = 0;
3081 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
3082 if (sdata->tx_conf[ac].uapsd)
3083 uapsd_queues |= BIT(ac);
66e67e41
JB		 3084 }
3085
b0b6aa2c 3086 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues);
66e67e41 3087}
8e3c1b77 3088
98c8fccf 3089static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
8e3c1b77 3090 struct ieee80211_mgmt *mgmt, size_t len,
98c8fccf 3091 struct ieee80211_rx_status *rx_status,
d45c4172 3092 struct ieee802_11_elems *elems)
98c8fccf
JB		 3093{
3094 struct ieee80211_local *local = sdata->local;
c2b13452 3095 struct ieee80211_bss *bss;
98c8fccf 3096 struct ieee80211_channel *channel;
56007a02 3097
8d61ffa5 3098 sdata_assert_lock(sdata);
b4f286a1 3099
3afc2167
EG		 3100 channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
3101 if (!channel)
98c8fccf
JB		 3102 return;
3103
98c8fccf 3104 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
d45c4172 3105 channel);
817cee76 3106 if (bss) {
817cee76 3107 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
d2722f8b 3108 ieee80211_rx_bss_put(local, bss);
817cee76 3109 }
f0706e82
JB		 3110}
3111
3112
f698d856 3113static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 3114 struct sk_buff *skb)
f0706e82 3115{
af6b6374 3116 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 3117 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 3118 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
3119 size_t baselen, len = skb->len;
ae6a44e3
EK		 3120 struct ieee802_11_elems elems;
3121
15b7b062
KV		 3122 ifmgd = &sdata->u.mgd;
3123
8d61ffa5 3124 sdata_assert_lock(sdata);
77fdaa12 3125
b203ca39 3126 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
8e7cdbb6
TW		 3127 return; /* ignore ProbeResp to foreign address */
3128
ae6a44e3
EK		 3129 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
3130 if (baselen > len)
3131 return;
3132
3133 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
b2e506bf 3134 false, &elems);
ae6a44e3 3135
d45c4172 3136 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
9859b81e 3137
77fdaa12 3138 if (ifmgd->associated &&
b203ca39 3139 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
4e5ff376 3140 ieee80211_reset_ap_probe(sdata);
66e67e41
JB		 3141
3142 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
b203ca39 3143 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
66e67e41 3144 /* got probe response, continue with auth */
bdcbd8e0 3145 sdata_info(sdata, "direct probe responded\n");
66e67e41
JB		 3146 ifmgd->auth_data->tries = 0;
3147 ifmgd->auth_data->timeout = jiffies;
89afe614 3148 ifmgd->auth_data->timeout_started = true;
8d61ffa5 3149 run_again(sdata, ifmgd->auth_data->timeout);
66e67e41 3150 }
f0706e82
JB		 3151}
3152
d91f36db
JB		 3153/*
3154 * This is the canonical list of information elements we care about,
3155 * the filter code also gives us all changes to the Microsoft OUI
c8d65917
SG		 3156 * (00:50:F2) vendor IE which is used for WMM which we need to track,
3157 * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3158 * changes to requested client power.
d91f36db
JB		 3159 *
3160 * We implement beacon filtering in software since that means we can
3161 * avoid processing the frame here and in cfg80211, and userspace
3162 * will not be able to tell whether the hardware supports it or not.
3163 *
3164 * XXX: This list needs to be dynamic -- userspace needs to be able to
3165 * add items it requires. It also needs to be able to tell us to
3166 * look out for other vendor IEs.
3167 */
3168static const u64 care_about_ies =
1d4df3a5
JB		 3169 (1ULL << WLAN_EID_COUNTRY) |
3170 (1ULL << WLAN_EID_ERP_INFO) |
3171 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
3172 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
3173 (1ULL << WLAN_EID_HT_CAPABILITY) |
074d46d1 3174 (1ULL << WLAN_EID_HT_OPERATION);
d91f36db 3175
8d61ffa5
JB		 3176static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
3177 struct ieee80211_mgmt *mgmt, size_t len,
3178 struct ieee80211_rx_status *rx_status)
f0706e82 3179{
d91f36db 3180 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 3181 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 3182 size_t baselen;
3183 struct ieee802_11_elems elems;
f698d856 3184 struct ieee80211_local *local = sdata->local;
55de908a
JB		 3185 struct ieee80211_chanctx_conf *chanctx_conf;
3186 struct ieee80211_channel *chan;
bee7f586 3187 struct sta_info *sta;
471b3efd 3188 u32 changed = 0;
f87ad637 3189 bool erp_valid;
7a5158ef 3190 u8 erp_value = 0;
d91f36db 3191 u32 ncrc;
77fdaa12 3192 u8 *bssid;
8d61ffa5 3193 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
77fdaa12 3194
8d61ffa5 3195 sdata_assert_lock(sdata);
f0706e82 3196
ae6a44e3
EK		 3197 /* Process beacon from the current BSS */
3198 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3199 if (baselen > len)
8d61ffa5 3200 return;
ae6a44e3 3201
55de908a
JB		 3202 rcu_read_lock();
3203 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3204 if (!chanctx_conf) {
3205 rcu_read_unlock();
8d61ffa5 3206 return;
55de908a
JB		 3207 }
3208
4bf88530 3209 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
55de908a 3210 rcu_read_unlock();
8d61ffa5 3211 return;
55de908a 3212 }
4bf88530 3213 chan = chanctx_conf->def.chan;
55de908a 3214 rcu_read_unlock();
f0706e82 3215
c65dd147 3216 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
b203ca39 3217 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
66e67e41 3218 ieee802_11_parse_elems(mgmt->u.beacon.variable,
b2e506bf 3219 len - baselen, false, &elems);
77fdaa12 3220
d45c4172 3221 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
482a9c74
AB		 3222 if (elems.tim && !elems.parse_error) {
3223 const struct ieee80211_tim_ie *tim_ie = elems.tim;
3224 ifmgd->dtim_period = tim_ie->dtim_period;
3225 }
989c6505 3226 ifmgd->have_beacon = true;
c65dd147 3227 ifmgd->assoc_data->need_beacon = false;
ef429dad
JB		 3228 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3229 sdata->vif.bss_conf.sync_tsf =
3230 le64_to_cpu(mgmt->u.beacon.timestamp);
3231 sdata->vif.bss_conf.sync_device_ts =
3232 rx_status->device_timestamp;
3233 if (elems.tim)
3234 sdata->vif.bss_conf.sync_dtim_count =
3235 elems.tim->dtim_count;
3236 else
3237 sdata->vif.bss_conf.sync_dtim_count = 0;
3238 }
66e67e41
JB		 3239 /* continue assoc process */
3240 ifmgd->assoc_data->timeout = jiffies;
89afe614 3241 ifmgd->assoc_data->timeout_started = true;
8d61ffa5
JB		 3242 run_again(sdata, ifmgd->assoc_data->timeout);
3243 return;
66e67e41 3244 }
77fdaa12 3245
66e67e41 3246 if (!ifmgd->associated ||
b203ca39 3247 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
8d61ffa5 3248 return;
66e67e41 3249 bssid = ifmgd->associated->bssid;
f0706e82 3250
17e4ec14
JM		 3251 /* Track average RSSI from the Beacon frames of the current AP */
3252 ifmgd->last_beacon_signal = rx_status->signal;
3253 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3254 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3ba06c6f 3255 ifmgd->ave_beacon_signal = rx_status->signal * 16;
17e4ec14 3256 ifmgd->last_cqm_event_signal = 0;
391a200a 3257 ifmgd->count_beacon_signal = 1;
615f7b9b 3258 ifmgd->last_ave_beacon_signal = 0;
17e4ec14
JM		 3259 } else {
3260 ifmgd->ave_beacon_signal =
3261 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
3262 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
3263 ifmgd->ave_beacon_signal) / 16;
391a200a 3264 ifmgd->count_beacon_signal++;
17e4ec14 3265 }
615f7b9b
MV		 3266
3267 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3268 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3269 int sig = ifmgd->ave_beacon_signal;
3270 int last_sig = ifmgd->last_ave_beacon_signal;
3271
3272 /*
3273 * if signal crosses either of the boundaries, invoke callback
3274 * with appropriate parameters
3275 */
3276 if (sig > ifmgd->rssi_max_thold &&
3277 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3278 ifmgd->last_ave_beacon_signal = sig;
887da917 3279 drv_rssi_callback(local, sdata, RSSI_EVENT_HIGH);
615f7b9b
MV		 3280 } else if (sig < ifmgd->rssi_min_thold &&
3281 (last_sig >= ifmgd->rssi_max_thold ||
3282 last_sig == 0)) {
3283 ifmgd->last_ave_beacon_signal = sig;
887da917 3284 drv_rssi_callback(local, sdata, RSSI_EVENT_LOW);
615f7b9b
MV		 3285 }
3286 }
3287
17e4ec14 3288 if (bss_conf->cqm_rssi_thold &&
391a200a 3289 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
ea086359 3290 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
17e4ec14
JM		 3291 int sig = ifmgd->ave_beacon_signal / 16;
3292 int last_event = ifmgd->last_cqm_event_signal;
3293 int thold = bss_conf->cqm_rssi_thold;
3294 int hyst = bss_conf->cqm_rssi_hyst;
3295 if (sig < thold &&
3296 (last_event == 0 || sig < last_event - hyst)) {
3297 ifmgd->last_cqm_event_signal = sig;
3298 ieee80211_cqm_rssi_notify(
3299 &sdata->vif,
3300 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3301 GFP_KERNEL);
3302 } else if (sig > thold &&
3303 (last_event == 0 || sig > last_event + hyst)) {
3304 ifmgd->last_cqm_event_signal = sig;
3305 ieee80211_cqm_rssi_notify(
3306 &sdata->vif,
3307 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3308 GFP_KERNEL);
3309 }
3310 }
3311
392b9ffb 3312 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
bdcbd8e0 3313 mlme_dbg_ratelimited(sdata,
112c31f0 3314 "cancelling AP probe due to a received beacon\n");
392b9ffb 3315 ieee80211_reset_ap_probe(sdata);
92778180
JM		 3316 }
3317
b291ba11
JB		 3318 /*
3319 * Push the beacon loss detection into the future since
3320 * we are processing a beacon from the AP just now.
3321 */
d3a910a8 3322 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 3323
d91f36db
JB		 3324 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3325 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
b2e506bf 3326 len - baselen, false, &elems,
d91f36db
JB		 3327 care_about_ies, ncrc);
3328
25c9c875 3329 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
f87ad637
RR		 3330 bool directed_tim = ieee80211_check_tim(elems.tim,
3331 elems.tim_len,
3332 ifmgd->aid);
1fb3606b 3333 if (directed_tim) {
572e0012 3334 if (local->hw.conf.dynamic_ps_timeout > 0) {
70b12f26
RW		 3335 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3336 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3337 ieee80211_hw_config(local,
3338 IEEE80211_CONF_CHANGE_PS);
3339 }
572e0012 3340 ieee80211_send_nullfunc(local, sdata, 0);
6f0756a3 3341 } else if (!local->pspolling && sdata->u.mgd.powersave) {
572e0012
KV		 3342 local->pspolling = true;
3343
3344 /*
3345 * Here is assumed that the driver will be
3346 * able to send ps-poll frame and receive a
3347 * response even though power save mode is
3348 * enabled, but some drivers might require
3349 * to disable power save here. This needs
3350 * to be investigated.
3351 */
3352 ieee80211_send_pspoll(local, sdata);
3353 }
a97b77b9
VN		 3354 }
3355 }
7a5158ef 3356
488dd7b5 3357 if (sdata->vif.p2p) {
67baf663 3358 struct ieee80211_p2p_noa_attr noa = {};
488dd7b5
JB		 3359 int ret;
3360
3361 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3362 len - baselen,
3363 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
934457ee 3364 (u8 *) &noa, sizeof(noa));
67baf663
JD		 3365 if (ret >= 2) {
3366 if (sdata->u.mgd.p2p_noa_index != noa.index) {
3367 /* valid noa_attr and index changed */
3368 sdata->u.mgd.p2p_noa_index = noa.index;
3369 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3370 changed |= BSS_CHANGED_P2P_PS;
3371 /*
3372 * make sure we update all information, the CRC
3373 * mechanism doesn't look at P2P attributes.
3374 */
3375 ifmgd->beacon_crc_valid = false;
3376 }
3377 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3378 /* noa_attr not found and we had valid noa_attr before */
3379 sdata->u.mgd.p2p_noa_index = -1;
3380 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
488dd7b5 3381 changed |= BSS_CHANGED_P2P_PS;
488dd7b5
JB		 3382 ifmgd->beacon_crc_valid = false;
3383 }
3384 }
3385
0c21e632
LC		 3386 if (ifmgd->csa_waiting_bcn)
3387 ieee80211_chswitch_post_beacon(sdata);
3388
d8ec4433 3389 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
8d61ffa5 3390 return;
30196673 3391 ifmgd->beacon_crc = ncrc;
d8ec4433 3392 ifmgd->beacon_crc_valid = true;
30196673 3393
d45c4172 3394 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
7d25745d 3395
d70b7616 3396 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
2ba45384 3397 rx_status->device_timestamp,
d70b7616
JB		 3398 &elems, true);
3399
095d81ce
JB		 3400 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3401 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
7d25745d
JB		 3402 elems.wmm_param_len))
3403 changed |= BSS_CHANGED_QOS;
3404
c65dd147
EG		 3405 /*
3406 * If we haven't had a beacon before, tell the driver about the
ef429dad 3407 * DTIM period (and beacon timing if desired) now.
c65dd147 3408 */
989c6505 3409 if (!ifmgd->have_beacon) {
c65dd147
EG		 3410 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3411 if (elems.tim)
3412 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3413 else
3414 bss_conf->dtim_period = 1;
ef429dad
JB		 3415
3416 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3417 sdata->vif.bss_conf.sync_tsf =
3418 le64_to_cpu(mgmt->u.beacon.timestamp);
3419 sdata->vif.bss_conf.sync_device_ts =
3420 rx_status->device_timestamp;
3421 if (elems.tim)
3422 sdata->vif.bss_conf.sync_dtim_count =
3423 elems.tim->dtim_count;
3424 else
3425 sdata->vif.bss_conf.sync_dtim_count = 0;
3426 }
3427
989c6505
AB		 3428 changed |= BSS_CHANGED_BEACON_INFO;
3429 ifmgd->have_beacon = true;
482a9c74
AB		 3430
3431 mutex_lock(&local->iflist_mtx);
3432 ieee80211_recalc_ps(local, -1);
3433 mutex_unlock(&local->iflist_mtx);
3434
ce857888 3435 ieee80211_recalc_ps_vif(sdata);
c65dd147
EG		 3436 }
3437
1946bed9 3438 if (elems.erp_info) {
7a5158ef
JB		 3439 erp_valid = true;
3440 erp_value = elems.erp_info[0];
3441 } else {
3442 erp_valid = false;
50c4afb9 3443 }
7a5158ef
JB		 3444 changed |= ieee80211_handle_bss_capability(sdata,
3445 le16_to_cpu(mgmt->u.beacon.capab_info),
3446 erp_valid, erp_value);
f0706e82 3447
1128958d 3448 mutex_lock(&local->sta_mtx);
bee7f586
JB		 3449 sta = sta_info_get(sdata, bssid);
3450
53b954ee
EP		 3451 if (ieee80211_config_bw(sdata, sta,
3452 elems.ht_cap_elem, elems.ht_operation,
30eb1dc2
JB		 3453 elems.vht_operation, bssid, &changed)) {
3454 mutex_unlock(&local->sta_mtx);
3455 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3456 WLAN_REASON_DEAUTH_LEAVING,
3457 true, deauth_buf);
6ff57cf8
JB		 3458 cfg80211_tx_mlme_mgmt(sdata->dev, deauth_buf,
3459 sizeof(deauth_buf));
8d61ffa5 3460 return;
30eb1dc2 3461 }
bee7f586
JB		 3462
3463 if (sta && elems.opmode_notif)
3464 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3465 rx_status->band, true);
1128958d 3466 mutex_unlock(&local->sta_mtx);
d3c990fb 3467
24a4e400
SG		 3468 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
3469 elems.country_elem,
3470 elems.country_elem_len,
c8d65917
SG		 3471 elems.pwr_constr_elem,
3472 elems.cisco_dtpc_elem);
3f2355cb 3473
471b3efd 3474 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 3475}
3476
1fa57d01
JB		 3477void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3478 struct sk_buff *skb)
f0706e82
JB		 3479{
3480 struct ieee80211_rx_status *rx_status;
f0706e82
JB		 3481 struct ieee80211_mgmt *mgmt;
3482 u16 fc;
1b3a2e49
JB		 3483 struct ieee802_11_elems elems;
3484 int ies_len;
f0706e82 3485
f0706e82
JB		 3486 rx_status = (struct ieee80211_rx_status *) skb->cb;
3487 mgmt = (struct ieee80211_mgmt *) skb->data;
3488 fc = le16_to_cpu(mgmt->frame_control);
3489
8d61ffa5 3490 sdata_lock(sdata);
77fdaa12 3491
66e67e41
JB		 3492 switch (fc & IEEE80211_FCTL_STYPE) {
3493 case IEEE80211_STYPE_BEACON:
8d61ffa5 3494 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
66e67e41
JB		 3495 break;
3496 case IEEE80211_STYPE_PROBE_RESP:
3497 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3498 break;
3499 case IEEE80211_STYPE_AUTH:
8d61ffa5 3500 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
66e67e41
JB		 3501 break;
3502 case IEEE80211_STYPE_DEAUTH:
8d61ffa5 3503 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
66e67e41
JB		 3504 break;
3505 case IEEE80211_STYPE_DISASSOC:
8d61ffa5 3506 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
66e67e41
JB		 3507 break;
3508 case IEEE80211_STYPE_ASSOC_RESP:
3509 case IEEE80211_STYPE_REASSOC_RESP:
8d61ffa5 3510 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
66e67e41
JB		 3511 break;
3512 case IEEE80211_STYPE_ACTION:
37799e52 3513 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
1b3a2e49
JB		 3514 ies_len = skb->len -
3515 offsetof(struct ieee80211_mgmt,
3516 u.action.u.chan_switch.variable);
37799e52
JB		 3517
3518 if (ies_len < 0)
3519 break;
3520
3521 ieee802_11_parse_elems(
3522 mgmt->u.action.u.chan_switch.variable,
b2e506bf 3523 ies_len, true, &elems);
37799e52
JB		 3524
3525 if (elems.parse_error)
3526 break;
3527
1b3a2e49 3528 ieee80211_sta_process_chanswitch(sdata,
2ba45384
LC		 3529 rx_status->mactime,
3530 rx_status->device_timestamp,
3531 &elems, false);
1b3a2e49
JB		 3532 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3533 ies_len = skb->len -
3534 offsetof(struct ieee80211_mgmt,
3535 u.action.u.ext_chan_switch.variable);
3536
3537 if (ies_len < 0)
3538 break;
3539
3540 ieee802_11_parse_elems(
3541 mgmt->u.action.u.ext_chan_switch.variable,
b2e506bf 3542 ies_len, true, &elems);
1b3a2e49
JB		 3543
3544 if (elems.parse_error)
3545 break;
3546
3547 /* for the handling code pretend this was also an IE */
3548 elems.ext_chansw_ie =
3549 &mgmt->u.action.u.ext_chan_switch.data;
3550
66e67e41 3551 ieee80211_sta_process_chanswitch(sdata,
2ba45384
LC		 3552 rx_status->mactime,
3553 rx_status->device_timestamp,
3554 &elems, false);
77fdaa12 3555 }
37799e52 3556 break;
77fdaa12 3557 }
8d61ffa5 3558 sdata_unlock(sdata);
f0706e82
JB		 3559}
3560
9c6bd790 3561static void ieee80211_sta_timer(unsigned long data)
f0706e82 3562{
60f8b39c
JB		 3563 struct ieee80211_sub_if_data *sdata =
3564 (struct ieee80211_sub_if_data *) data;
5bb644a0 3565
9b7d72c1 3566 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
f0706e82
JB		 3567}
3568
04ac3c0e 3569static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
6b684db1 3570 u8 *bssid, u8 reason, bool tx)
04ac3c0e 3571{
6ae16775 3572 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
04ac3c0e 3573
37ad3888 3574 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
6b684db1 3575 tx, frame_buf);
37ad3888 3576
6ff57cf8
JB		 3577 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3578 IEEE80211_DEAUTH_FRAME_LEN);
04ac3c0e
FF		 3579}
3580
66e67e41
JB		 3581static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
3582{
3583 struct ieee80211_local *local = sdata->local;
3584 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3585 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
1672c0e3 3586 u32 tx_flags = 0;
66e67e41 3587
8d61ffa5 3588 sdata_assert_lock(sdata);
66e67e41
JB		 3589
3590 if (WARN_ON_ONCE(!auth_data))
3591 return -EINVAL;
3592
66e67e41
JB		 3593 auth_data->tries++;
3594
3595 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
bdcbd8e0
JB		 3596 sdata_info(sdata, "authentication with %pM timed out\n",
3597 auth_data->bss->bssid);
66e67e41
JB		 3598
3599 /*
3600 * Most likely AP is not in the range so remove the
3601 * bss struct for that AP.
3602 */
3603 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3604
3605 return -ETIMEDOUT;
3606 }
3607
a1845fc7
JB		 3608 drv_mgd_prepare_tx(local, sdata);
3609
66e67e41 3610 if (auth_data->bss->proberesp_ies) {
6b8ece3a
JM		 3611 u16 trans = 1;
3612 u16 status = 0;
3613
bdcbd8e0
JB		 3614 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3615 auth_data->bss->bssid, auth_data->tries,
3616 IEEE80211_AUTH_MAX_TRIES);
66e67e41
JB		 3617
3618 auth_data->expected_transaction = 2;
6b8ece3a
JM		 3619
3620 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3621 trans = auth_data->sae_trans;
3622 status = auth_data->sae_status;
3623 auth_data->expected_transaction = trans;
3624 }
3625
6211dd12
SG		 3626 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3627 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3628 IEEE80211_TX_INTFL_MLME_CONN_TX;
3629
6b8ece3a
JM		 3630 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3631 auth_data->data, auth_data->data_len,
66e67e41 3632 auth_data->bss->bssid,
1672c0e3
JB		 3633 auth_data->bss->bssid, NULL, 0, 0,
3634 tx_flags);
66e67e41
JB		 3635 } else {
3636 const u8 *ssidie;
3637
bdcbd8e0
JB		 3638 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
3639 auth_data->bss->bssid, auth_data->tries,
3640 IEEE80211_AUTH_MAX_TRIES);
66e67e41 3641
9caf0364 3642 rcu_read_lock();
66e67e41 3643 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
9caf0364
JB		 3644 if (!ssidie) {
3645 rcu_read_unlock();
66e67e41 3646 return -EINVAL;
9caf0364 3647 }
66e67e41
JB		 3648 /*
3649 * Direct probe is sent to broadcast address as some APs
3650 * will not answer to direct packet in unassociated state.
3651 */
3652 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
6211dd12 3653 NULL, 0, (u32) -1, true, 0,
55de908a 3654 auth_data->bss->channel, false);
9caf0364 3655 rcu_read_unlock();
66e67e41
JB		 3656 }
3657
6211dd12 3658 if (tx_flags == 0) {
1672c0e3 3659 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
cb236d2d 3660 auth_data->timeout_started = true;
8d61ffa5 3661 run_again(sdata, auth_data->timeout);
89afe614 3662 } else {
cb236d2d
JB		 3663 auth_data->timeout =
3664 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3665 auth_data->timeout_started = true;
3666 run_again(sdata, auth_data->timeout);
1672c0e3 3667 }
66e67e41
JB		 3668
3669 return 0;
3670}
3671
3672static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3673{
3674 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3675 struct ieee80211_local *local = sdata->local;
3676
8d61ffa5 3677 sdata_assert_lock(sdata);
66e67e41 3678
66e67e41
JB		 3679 assoc_data->tries++;
3680 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
bdcbd8e0
JB		 3681 sdata_info(sdata, "association with %pM timed out\n",
3682 assoc_data->bss->bssid);
66e67e41
JB		 3683
3684 /*
3685 * Most likely AP is not in the range so remove the
3686 * bss struct for that AP.
3687 */
3688 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3689
3690 return -ETIMEDOUT;
3691 }
3692
bdcbd8e0
JB		 3693 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3694 assoc_data->bss->bssid, assoc_data->tries,
3695 IEEE80211_ASSOC_MAX_TRIES);
66e67e41
JB		 3696 ieee80211_send_assoc(sdata);
3697
1672c0e3
JB		 3698 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
3699 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
89afe614 3700 assoc_data->timeout_started = true;
8d61ffa5 3701 run_again(sdata, assoc_data->timeout);
89afe614 3702 } else {
cb236d2d
JB		 3703 assoc_data->timeout =
3704 round_jiffies_up(jiffies +
3705 IEEE80211_ASSOC_TIMEOUT_LONG);
3706 assoc_data->timeout_started = true;
3707 run_again(sdata, assoc_data->timeout);
1672c0e3 3708 }
66e67e41
JB		 3709
3710 return 0;
3711}
3712
1672c0e3
JB		 3713void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3714 __le16 fc, bool acked)
3715{
3716 struct ieee80211_local *local = sdata->local;
3717
3718 sdata->u.mgd.status_fc = fc;
3719 sdata->u.mgd.status_acked = acked;
3720 sdata->u.mgd.status_received = true;
3721
3722 ieee80211_queue_work(&local->hw, &sdata->work);
3723}
3724
1fa57d01 3725void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 3726{
9c6bd790 3727 struct ieee80211_local *local = sdata->local;
1fa57d01 3728 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 3729
8d61ffa5 3730 sdata_lock(sdata);
77fdaa12 3731
1672c0e3
JB		 3732 if (ifmgd->status_received) {
3733 __le16 fc = ifmgd->status_fc;
3734 bool status_acked = ifmgd->status_acked;
3735
3736 ifmgd->status_received = false;
3737 if (ifmgd->auth_data &&
3738 (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) {
3739 if (status_acked) {
3740 ifmgd->auth_data->timeout =
3741 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
8d61ffa5 3742 run_again(sdata, ifmgd->auth_data->timeout);
1672c0e3
JB		 3743 } else {
3744 ifmgd->auth_data->timeout = jiffies - 1;
3745 }
89afe614 3746 ifmgd->auth_data->timeout_started = true;
1672c0e3
JB		 3747 } else if (ifmgd->assoc_data &&
3748 (ieee80211_is_assoc_req(fc) ||
3749 ieee80211_is_reassoc_req(fc))) {
3750 if (status_acked) {
3751 ifmgd->assoc_data->timeout =
3752 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
8d61ffa5 3753 run_again(sdata, ifmgd->assoc_data->timeout);
1672c0e3
JB		 3754 } else {
3755 ifmgd->assoc_data->timeout = jiffies - 1;
3756 }
89afe614 3757 ifmgd->assoc_data->timeout_started = true;
1672c0e3
JB		 3758 }
3759 }
3760
89afe614 3761 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
66e67e41
JB		 3762 time_after(jiffies, ifmgd->auth_data->timeout)) {
3763 if (ifmgd->auth_data->done) {
3764 /*
3765 * ok ... we waited for assoc but userspace didn't,
3766 * so let's just kill the auth data
3767 */
3768 ieee80211_destroy_auth_data(sdata, false);
3769 } else if (ieee80211_probe_auth(sdata)) {
3770 u8 bssid[ETH_ALEN];
3771
3772 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3773
3774 ieee80211_destroy_auth_data(sdata, false);
3775
6ff57cf8 3776 cfg80211_auth_timeout(sdata->dev, bssid);
66e67e41 3777 }
89afe614 3778 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
8d61ffa5 3779 run_again(sdata, ifmgd->auth_data->timeout);
66e67e41 3780
89afe614 3781 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
66e67e41 3782 time_after(jiffies, ifmgd->assoc_data->timeout)) {
989c6505 3783 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
66e67e41 3784 ieee80211_do_assoc(sdata)) {
959867fa 3785 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
66e67e41
JB		 3786
3787 ieee80211_destroy_assoc_data(sdata, false);
959867fa 3788 cfg80211_assoc_timeout(sdata->dev, bss);
66e67e41 3789 }
89afe614 3790 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
8d61ffa5 3791 run_again(sdata, ifmgd->assoc_data->timeout);
66e67e41 3792
392b9ffb 3793 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
b291ba11 3794 ifmgd->associated) {
a43abf29 3795 u8 bssid[ETH_ALEN];
72a8a3ed 3796 int max_tries;
a43abf29 3797
0c1ad2ca 3798 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 3799
72a8a3ed 3800 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
180205bd 3801 max_tries = max_nullfunc_tries;
72a8a3ed 3802 else
180205bd 3803 max_tries = max_probe_tries;
72a8a3ed 3804
4e5ff376
FF		 3805 /* ACK received for nullfunc probing frame */
3806 if (!ifmgd->probe_send_count)
3807 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 3808 else if (ifmgd->nullfunc_failed) {
3809 if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3810 mlme_dbg(sdata,
3811 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3812 bssid, ifmgd->probe_send_count,
3813 max_tries);
04ac3c0e
FF		 3814 ieee80211_mgd_probe_ap_send(sdata);
3815 } else {
bdcbd8e0
JB		 3816 mlme_dbg(sdata,
3817 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3818 bssid);
95acac61 3819 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1
JB		 3820 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3821 false);
04ac3c0e
FF		 3822 }
3823 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
8d61ffa5 3824 run_again(sdata, ifmgd->probe_timeout);
04ac3c0e 3825 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
bdcbd8e0
JB		 3826 mlme_dbg(sdata,
3827 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3828 bssid, probe_wait_ms);
95acac61 3829 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 3830 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
04ac3c0e 3831 } else if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3832 mlme_dbg(sdata,
3833 "No probe response from AP %pM after %dms, try %d/%i\n",
3834 bssid, probe_wait_ms,
3835 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 3836 ieee80211_mgd_probe_ap_send(sdata);
3837 } else {
b291ba11
JB		 3838 /*
3839 * We actually lost the connection ... or did we?
3840 * Let's make sure!
3841 */
b38afa87
BG		 3842 wiphy_debug(local->hw.wiphy,
3843 "%s: No probe response from AP %pM"
3844 " after %dms, disconnecting.\n",
3845 sdata->name,
180205bd 3846 bssid, probe_wait_ms);
04ac3c0e 3847
95acac61 3848 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 3849 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
b291ba11
JB		 3850 }
3851 }
3852
8d61ffa5 3853 sdata_unlock(sdata);
f0706e82
JB		 3854}
3855
b291ba11
JB		 3856static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3857{
3858 struct ieee80211_sub_if_data *sdata =
3859 (struct ieee80211_sub_if_data *) data;
3860 struct ieee80211_local *local = sdata->local;
0c21e632 3861 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11
JB		 3862
3863 if (local->quiescing)
3864 return;
3865
0c21e632 3866 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
e5593f56
MK		 3867 return;
3868
682bd38b 3869 sdata->u.mgd.connection_loss = false;
1e4dcd01
JO		 3870 ieee80211_queue_work(&sdata->local->hw,
3871 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 3872}
3873
3874static void ieee80211_sta_conn_mon_timer(unsigned long data)
3875{
3876 struct ieee80211_sub_if_data *sdata =
3877 (struct ieee80211_sub_if_data *) data;
3878 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3879 struct ieee80211_local *local = sdata->local;
3880
3881 if (local->quiescing)
3882 return;
3883
0c21e632 3884 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
e5593f56
MK		 3885 return;
3886
42935eca 3887 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 3888}
3889
3890static void ieee80211_sta_monitor_work(struct work_struct *work)
3891{
3892 struct ieee80211_sub_if_data *sdata =
3893 container_of(work, struct ieee80211_sub_if_data,
3894 u.mgd.monitor_work);
3895
3896 ieee80211_mgd_probe_ap(sdata, false);
3897}
3898
9c6bd790
JB		 3899static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3900{
494f1fe5
EP		 3901 u32 flags;
3902
ad935687 3903 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
925e64c3 3904 __ieee80211_stop_poll(sdata);
ad935687 3905
b291ba11 3906 /* let's probe the connection once */
494f1fe5
EP		 3907 flags = sdata->local->hw.flags;
3908 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3909 ieee80211_queue_work(&sdata->local->hw,
3910 &sdata->u.mgd.monitor_work);
b291ba11 3911 /* and do all the other regular work too */
64592c8f 3912 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 3913 }
9c6bd790 3914}
f0706e82 3915
b8360ab8 3916#ifdef CONFIG_PM
1a1cb744
JB		 3917void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
3918{
3919 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3920 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3921
3922 sdata_lock(sdata);
3923
c52666ae
EG		 3924 if (ifmgd->auth_data || ifmgd->assoc_data) {
3925 const u8 *bssid = ifmgd->auth_data ?
3926 ifmgd->auth_data->bss->bssid :
3927 ifmgd->assoc_data->bss->bssid;
3928
1a1cb744 3929 /*
c52666ae
EG		 3930 * If we are trying to authenticate / associate while suspending,
3931 * cfg80211 won't know and won't actually abort those attempts,
3932 * thus we need to do that ourselves.
1a1cb744 3933 */
c52666ae 3934 ieee80211_send_deauth_disassoc(sdata, bssid,
1a1cb744
JB		 3935 IEEE80211_STYPE_DEAUTH,
3936 WLAN_REASON_DEAUTH_LEAVING,
3937 false, frame_buf);
c52666ae
EG		 3938 if (ifmgd->assoc_data)
3939 ieee80211_destroy_assoc_data(sdata, false);
3940 if (ifmgd->auth_data)
3941 ieee80211_destroy_auth_data(sdata, false);
1a1cb744
JB		 3942 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3943 IEEE80211_DEAUTH_FRAME_LEN);
3944 }
3945
3946 sdata_unlock(sdata);
3947}
3948
b8360ab8
JB		 3949void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
3950{
3951 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3952
8d61ffa5 3953 sdata_lock(sdata);
b8360ab8 3954 if (!ifmgd->associated) {
8d61ffa5 3955 sdata_unlock(sdata);
b8360ab8
JB		 3956 return;
3957 }
3958
3959 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
3960 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
3961 mlme_dbg(sdata, "driver requested disconnect after resume\n");
3962 ieee80211_sta_connection_lost(sdata,
3963 ifmgd->associated->bssid,
3964 WLAN_REASON_UNSPECIFIED,
3965 true);
8d61ffa5 3966 sdata_unlock(sdata);
b8360ab8
JB		 3967 return;
3968 }
8d61ffa5 3969 sdata_unlock(sdata);
b8360ab8
JB		 3970}
3971#endif
3972
9c6bd790
JB		 3973/* interface setup */
3974void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 3975{
46900298 3976 struct ieee80211_if_managed *ifmgd;
988c0f72 3977
46900298 3978 ifmgd = &sdata->u.mgd;
b291ba11 3979 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 3980 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 3981 INIT_WORK(&ifmgd->beacon_connection_loss_work,
3982 ieee80211_beacon_connection_loss_work);
882a7c69
JB		 3983 INIT_WORK(&ifmgd->csa_connection_drop_work,
3984 ieee80211_csa_connection_drop_work);
687da132 3985 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
81dd2b88
AN		 3986 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
3987 ieee80211_tdls_peer_del_work);
46900298 3988 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 3989 (unsigned long) sdata);
b291ba11
JB		 3990 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
3991 (unsigned long) sdata);
3992 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
3993 (unsigned long) sdata);
46900298 3994 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 3995 (unsigned long) sdata);
02219b3a
JB		 3996 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
3997 ieee80211_sta_handle_tspec_ac_params_wk);
9c6bd790 3998
ab1faead 3999 ifmgd->flags = 0;
1478acb3 4000 ifmgd->powersave = sdata->wdev.ps;
219c3867
AB		 4001 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
4002 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
67baf663 4003 ifmgd->p2p_noa_index = -1;
bbbdff9e 4004
0d8614b4 4005 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
0f78231b
JB		 4006 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
4007 else
4008 ifmgd->req_smps = IEEE80211_SMPS_OFF;
1277b4a9
LK		 4009
4010 /* Setup TDLS data */
4011 spin_lock_init(&ifmgd->teardown_lock);
4012 ifmgd->teardown_skb = NULL;
4013 ifmgd->orig_teardown_skb = NULL;
f0706e82
JB		 4014}
4015
77fdaa12
JB		 4016/* scan finished notification */
4017void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 4018{
31ee67a1 4019 struct ieee80211_sub_if_data *sdata;
60f8b39c 4020
77fdaa12
JB		 4021 /* Restart STA timers */
4022 rcu_read_lock();
370bd005
BG		 4023 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4024 if (ieee80211_sdata_running(sdata))
4025 ieee80211_restart_sta_timer(sdata);
4026 }
77fdaa12
JB		 4027 rcu_read_unlock();
4028}
60f8b39c 4029
77fdaa12
JB		 4030int ieee80211_max_network_latency(struct notifier_block *nb,
4031 unsigned long data, void *dummy)
4032{
4033 s32 latency_usec = (s32) data;
4034 struct ieee80211_local *local =
4035 container_of(nb, struct ieee80211_local,
4036 network_latency_notifier);
1fa6f4af 4037
77fdaa12
JB		 4038 mutex_lock(&local->iflist_mtx);
4039 ieee80211_recalc_ps(local, latency_usec);
4040 mutex_unlock(&local->iflist_mtx);
dfe67012 4041
8bd811aa 4042 return NOTIFY_OK;
9c6bd790
JB		 4043}
4044
f2d9d270
JB		 4045static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
4046 struct cfg80211_bss *cbss)
4047{
4048 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4049 const u8 *ht_cap_ie, *vht_cap_ie;
4050 const struct ieee80211_ht_cap *ht_cap;
4051 const struct ieee80211_vht_cap *vht_cap;
4052 u8 chains = 1;
4053
4054 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
4055 return chains;
4056
9caf0364 4057 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
f2d9d270
JB		 4058 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
4059 ht_cap = (void *)(ht_cap_ie + 2);
4060 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4061 /*
4062 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4063 * "Tx Unequal Modulation Supported" fields.
4064 */
4065 }
4066
4067 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
4068 return chains;
4069
9caf0364 4070 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
f2d9d270
JB		 4071 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
4072 u8 nss;
4073 u16 tx_mcs_map;
4074
4075 vht_cap = (void *)(vht_cap_ie + 2);
4076 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4077 for (nss = 8; nss > 0; nss--) {
4078 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4079 IEEE80211_VHT_MCS_NOT_SUPPORTED)
4080 break;
4081 }
4082 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4083 chains = max(chains, nss);
4084 }
4085
4086 return chains;
4087}
4088
b17166a7
JB		 4089static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4090 struct cfg80211_bss *cbss)
a1cf775d
JB		 4091{
4092 struct ieee80211_local *local = sdata->local;
4093 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
53b954ee 4094 const struct ieee80211_ht_cap *ht_cap = NULL;
24398e39 4095 const struct ieee80211_ht_operation *ht_oper = NULL;
f2d9d270 4096 const struct ieee80211_vht_operation *vht_oper = NULL;
24398e39 4097 struct ieee80211_supported_band *sband;
4bf88530 4098 struct cfg80211_chan_def chandef;
f2d9d270 4099 int ret;
a1cf775d 4100
24398e39
JB		 4101 sband = local->hw.wiphy->bands[cbss->channel->band];
4102
f2d9d270
JB		 4103 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
4104 IEEE80211_STA_DISABLE_80P80MHZ |
4105 IEEE80211_STA_DISABLE_160MHZ);
4106
9caf0364
JB		 4107 rcu_read_lock();
4108
f2d9d270
JB		 4109 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
4110 sband->ht_cap.ht_supported) {
53b954ee 4111 const u8 *ht_oper_ie, *ht_cap_ie;
24398e39 4112
9caf0364 4113 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
24398e39
JB		 4114 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
4115 ht_oper = (void *)(ht_oper_ie + 2);
08e6effa 4116
53b954ee
EP		 4117 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4118 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
4119 ht_cap = (void *)(ht_cap_ie + 2);
4120
4121 if (!ht_cap) {
08e6effa
JB		 4122 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4123 ht_oper = NULL;
4124 }
24398e39
JB		 4125 }
4126
f2d9d270
JB		 4127 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4128 sband->vht_cap.vht_supported) {
08e6effa 4129 const u8 *vht_oper_ie, *vht_cap;
f2d9d270 4130
9caf0364
JB		 4131 vht_oper_ie = ieee80211_bss_get_ie(cbss,
4132 WLAN_EID_VHT_OPERATION);
f2d9d270
JB		 4133 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
4134 vht_oper = (void *)(vht_oper_ie + 2);
4135 if (vht_oper && !ht_oper) {
4136 vht_oper = NULL;
bdcbd8e0 4137 sdata_info(sdata,
f2d9d270 4138 "AP advertised VHT without HT, disabling both\n");
cb145022
JB		 4139 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4140 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
24398e39 4141 }
08e6effa
JB		 4142
4143 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4144 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
4145 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4146 vht_oper = NULL;
4147 }
24398e39
JB		 4148 }
4149
f2d9d270
JB		 4150 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
4151 cbss->channel,
53b954ee 4152 ht_cap, ht_oper, vht_oper,
5cdaed1e 4153 &chandef, false);
04ecd257 4154
f2d9d270
JB		 4155 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
4156 local->rx_chains);
24398e39 4157
9caf0364
JB		 4158 rcu_read_unlock();
4159
04ecd257
JB		 4160 /* will change later if needed */
4161 sdata->smps_mode = IEEE80211_SMPS_OFF;
4162
34a3740d 4163 mutex_lock(&local->mtx);
f2d9d270
JB		 4164 /*
4165 * If this fails (possibly due to channel context sharing
4166 * on incompatible channels, e.g. 80+80 and 160 sharing the
4167 * same control channel) try to use a smaller bandwidth.
4168 */
4169 ret = ieee80211_vif_use_channel(sdata, &chandef,
4170 IEEE80211_CHANCTX_SHARED);
0418a445
SW		 4171
4172 /* don't downgrade for 5 and 10 MHz channels, though. */
4173 if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4174 chandef.width == NL80211_CHAN_WIDTH_10)
34a3740d 4175 goto out;
0418a445 4176
d601cd8d 4177 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
e6b7cde4 4178 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
d601cd8d
JB		 4179 ret = ieee80211_vif_use_channel(sdata, &chandef,
4180 IEEE80211_CHANCTX_SHARED);
4181 }
34a3740d
JB		 4182 out:
4183 mutex_unlock(&local->mtx);
f2d9d270 4184 return ret;
b17166a7
JB		 4185}
4186
4187static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
4188 struct cfg80211_bss *cbss, bool assoc)
4189{
4190 struct ieee80211_local *local = sdata->local;
4191 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4192 struct ieee80211_bss *bss = (void *)cbss->priv;
4193 struct sta_info *new_sta = NULL;
4194 bool have_sta = false;
4195 int err;
4196
4197 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
4198 return -EINVAL;
4199
4200 if (assoc) {
4201 rcu_read_lock();
4202 have_sta = sta_info_get(sdata, cbss->bssid);
4203 rcu_read_unlock();
4204 }
4205
4206 if (!have_sta) {
4207 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4208 if (!new_sta)
4209 return -ENOMEM;
4210 }
13e0c8e3 4211 if (new_sta) {
5d6a1b06
JB		 4212 u32 rates = 0, basic_rates = 0;
4213 bool have_higher_than_11mbit;
4214 int min_rate = INT_MAX, min_rate_index = -1;
2103dec1 4215 struct ieee80211_chanctx_conf *chanctx_conf;
b17166a7 4216 struct ieee80211_supported_band *sband;
8cef2c9d 4217 const struct cfg80211_bss_ies *ies;
2103dec1
SW		 4218 int shift;
4219 u32 rate_flags;
b17166a7
JB		 4220
4221 sband = local->hw.wiphy->bands[cbss->channel->band];
4222
4223 err = ieee80211_prep_channel(sdata, cbss);
4224 if (err) {
4225 sta_info_free(local, new_sta);
2103dec1 4226 return -EINVAL;
b17166a7 4227 }
2103dec1
SW		 4228 shift = ieee80211_vif_get_shift(&sdata->vif);
4229
4230 rcu_read_lock();
4231 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4232 if (WARN_ON(!chanctx_conf)) {
4233 rcu_read_unlock();
c368ddaa 4234 sta_info_free(local, new_sta);
2103dec1
SW		 4235 return -EINVAL;
4236 }
4237 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
4238 rcu_read_unlock();
5d6a1b06 4239
5d6a1b06
JB		 4240 ieee80211_get_rates(sband, bss->supp_rates,
4241 bss->supp_rates_len,
4242 &rates, &basic_rates,
4243 &have_higher_than_11mbit,
2103dec1
SW		 4244 &min_rate, &min_rate_index,
4245 shift, rate_flags);
5d6a1b06
JB		 4246
4247 /*
4248 * This used to be a workaround for basic rates missing
4249 * in the association response frame. Now that we no
4250 * longer use the basic rates from there, it probably
4251 * doesn't happen any more, but keep the workaround so
4252 * in case some *other* APs are buggy in different ways
4253 * we can connect -- with a warning.
4254 */
4255 if (!basic_rates && min_rate_index >= 0) {
bdcbd8e0
JB		 4256 sdata_info(sdata,
4257 "No basic rates, using min rate instead\n");
5d6a1b06
JB		 4258 basic_rates = BIT(min_rate_index);
4259 }
4260
13e0c8e3 4261 new_sta->sta.supp_rates[cbss->channel->band] = rates;
5d6a1b06
JB		 4262 sdata->vif.bss_conf.basic_rates = basic_rates;
4263
4264 /* cf. IEEE 802.11 9.2.12 */
55de908a 4265 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
5d6a1b06
JB		 4266 have_higher_than_11mbit)
4267 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
4268 else
4269 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
4270
4271 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
4272
8c358bcd
JB		 4273 /* set timing information */
4274 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
8cef2c9d 4275 rcu_read_lock();
ef429dad
JB		 4276 ies = rcu_dereference(cbss->beacon_ies);
4277 if (ies) {
4278 const u8 *tim_ie;
4279
4280 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4281 sdata->vif.bss_conf.sync_device_ts =
4282 bss->device_ts_beacon;
4283 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4284 ies->data, ies->len);
4285 if (tim_ie && tim_ie[1] >= 2)
4286 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
4287 else
4288 sdata->vif.bss_conf.sync_dtim_count = 0;
4289 } else if (!(local->hw.flags &
4290 IEEE80211_HW_TIMING_BEACON_ONLY)) {
4291 ies = rcu_dereference(cbss->proberesp_ies);
4292 /* must be non-NULL since beacon IEs were NULL */
4293 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4294 sdata->vif.bss_conf.sync_device_ts =
4295 bss->device_ts_presp;
4296 sdata->vif.bss_conf.sync_dtim_count = 0;
4297 } else {
4298 sdata->vif.bss_conf.sync_tsf = 0;
4299 sdata->vif.bss_conf.sync_device_ts = 0;
4300 sdata->vif.bss_conf.sync_dtim_count = 0;
4301 }
8cef2c9d 4302 rcu_read_unlock();
8c358bcd
JB		 4303
4304 /* tell driver about BSSID, basic rates and timing */
5d6a1b06 4305 ieee80211_bss_info_change_notify(sdata,
8c358bcd
JB		 4306 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4307 BSS_CHANGED_BEACON_INT);
a1cf775d
JB		 4308
4309 if (assoc)
13e0c8e3 4310 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
a1cf775d 4311
13e0c8e3
JB		 4312 err = sta_info_insert(new_sta);
4313 new_sta = NULL;
a1cf775d 4314 if (err) {
bdcbd8e0
JB		 4315 sdata_info(sdata,
4316 "failed to insert STA entry for the AP (error %d)\n",
4317 err);
a1cf775d
JB		 4318 return err;
4319 }
4320 } else
b203ca39 4321 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
a1cf775d
JB		 4322
4323 return 0;
4324}
4325
77fdaa12
JB		 4326/* config hooks */
4327int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4328 struct cfg80211_auth_request *req)
9c6bd790 4329{
66e67e41
JB		 4330 struct ieee80211_local *local = sdata->local;
4331 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4332 struct ieee80211_mgd_auth_data *auth_data;
77fdaa12 4333 u16 auth_alg;
66e67e41
JB		 4334 int err;
4335
4336 /* prepare auth data structure */
9c6bd790 4337
77fdaa12
JB		 4338 switch (req->auth_type) {
4339 case NL80211_AUTHTYPE_OPEN_SYSTEM:
4340 auth_alg = WLAN_AUTH_OPEN;
4341 break;
4342 case NL80211_AUTHTYPE_SHARED_KEY:
66e67e41 4343 if (IS_ERR(local->wep_tx_tfm))
9dca9c49 4344 return -EOPNOTSUPP;
77fdaa12
JB		 4345 auth_alg = WLAN_AUTH_SHARED_KEY;
4346 break;
4347 case NL80211_AUTHTYPE_FT:
4348 auth_alg = WLAN_AUTH_FT;
4349 break;
4350 case NL80211_AUTHTYPE_NETWORK_EAP:
4351 auth_alg = WLAN_AUTH_LEAP;
4352 break;
6b8ece3a
JM		 4353 case NL80211_AUTHTYPE_SAE:
4354 auth_alg = WLAN_AUTH_SAE;
4355 break;
77fdaa12
JB		 4356 default:
4357 return -EOPNOTSUPP;
60f8b39c 4358 }
77fdaa12 4359
6b8ece3a
JM		 4360 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
4361 req->ie_len, GFP_KERNEL);
66e67e41 4362 if (!auth_data)
9c6bd790 4363 return -ENOMEM;
77fdaa12 4364
66e67e41 4365 auth_data->bss = req->bss;
77fdaa12 4366
6b8ece3a
JM		 4367 if (req->sae_data_len >= 4) {
4368 __le16 *pos = (__le16 *) req->sae_data;
4369 auth_data->sae_trans = le16_to_cpu(pos[0]);
4370 auth_data->sae_status = le16_to_cpu(pos[1]);
4371 memcpy(auth_data->data, req->sae_data + 4,
4372 req->sae_data_len - 4);
4373 auth_data->data_len += req->sae_data_len - 4;
4374 }
4375
77fdaa12 4376 if (req->ie && req->ie_len) {
6b8ece3a
JM		 4377 memcpy(&auth_data->data[auth_data->data_len],
4378 req->ie, req->ie_len);
4379 auth_data->data_len += req->ie_len;
9c6bd790 4380 }
77fdaa12 4381
fffd0934 4382 if (req->key && req->key_len) {
66e67e41
JB		 4383 auth_data->key_len = req->key_len;
4384 auth_data->key_idx = req->key_idx;
4385 memcpy(auth_data->key, req->key, req->key_len);
fffd0934
JB		 4386 }
4387
66e67e41 4388 auth_data->algorithm = auth_alg;
60f8b39c 4389
66e67e41 4390 /* try to authenticate/probe */
2a33bee2 4391
66e67e41
JB		 4392 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4393 ifmgd->assoc_data) {
4394 err = -EBUSY;
4395 goto err_free;
2a33bee2
GE		 4396 }
4397
66e67e41
JB		 4398 if (ifmgd->auth_data)
4399 ieee80211_destroy_auth_data(sdata, false);
2a33bee2 4400
66e67e41
JB		 4401 /* prep auth_data so we don't go into idle on disassoc */
4402 ifmgd->auth_data = auth_data;
af6b6374 4403
7b119dc0
JB		 4404 if (ifmgd->associated) {
4405 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4406
4407 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4408 WLAN_REASON_UNSPECIFIED,
4409 false, frame_buf);
4410
6ff57cf8
JB		 4411 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4412 sizeof(frame_buf));
7b119dc0 4413 }
af6b6374 4414
bdcbd8e0 4415 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
e5b900d2 4416
a1cf775d
JB		 4417 err = ieee80211_prep_connection(sdata, req->bss, false);
4418 if (err)
66e67e41 4419 goto err_clear;
af6b6374 4420
66e67e41
JB		 4421 err = ieee80211_probe_auth(sdata);
4422 if (err) {
66e67e41
JB		 4423 sta_info_destroy_addr(sdata, req->bss->bssid);
4424 goto err_clear;
4425 }
4426
4427 /* hold our own reference */
5b112d3d 4428 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
8d61ffa5 4429 return 0;
66e67e41
JB		 4430
4431 err_clear:
3d2abdfd
EP		 4432 memset(ifmgd->bssid, 0, ETH_ALEN);
4433 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 4434 ifmgd->auth_data = NULL;
4435 err_free:
4436 kfree(auth_data);
66e67e41 4437 return err;
af6b6374
JB		 4438}
4439
095d81ce
JB		 4440static bool ieee80211_usable_wmm_params(struct ieee80211_sub_if_data *sdata,
4441 const u8 *wmm_param, int len)
4442{
4443 const u8 *pos;
4444 size_t left;
4445
4446 if (len < 8)
4447 return false;
4448
4449 if (wmm_param[5] != 1 /* version */)
4450 return false;
4451
4452 pos = wmm_param + 8;
4453 left = len - 8;
4454
4455 for (; left >= 4; left -= 4, pos += 4) {
4456 u8 aifsn = pos[0] & 0x0f;
4457 u8 ecwmin = pos[1] & 0x0f;
4458 u8 ecwmax = (pos[1] & 0xf0) >> 4;
4459 int aci = (pos[0] >> 5) & 0x03;
4460
4461 if (aifsn < 2) {
4462 sdata_info(sdata,
4463 "AP has invalid WMM params (AIFSN=%d for ACI %d), disabling WMM\n",
4464 aifsn, aci);
4465 return false;
4466 }
4467 if (ecwmin > ecwmax) {
4468 sdata_info(sdata,
4469 "AP has invalid WMM params (ECWmin/max=%d/%d for ACI %d), disabling WMM\n",
4470 ecwmin, ecwmax, aci);
4471 return false;
4472 }
4473 }
4474
4475 return true;
4476}
4477
77fdaa12
JB		 4478int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4479 struct cfg80211_assoc_request *req)
f0706e82 4480{
66e67e41 4481 struct ieee80211_local *local = sdata->local;
77fdaa12 4482 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 4483 struct ieee80211_bss *bss = (void *)req->bss->priv;
66e67e41 4484 struct ieee80211_mgd_assoc_data *assoc_data;
c65dd147 4485 const struct cfg80211_bss_ies *beacon_ies;
4e74bfdb 4486 struct ieee80211_supported_band *sband;
b08fbbd8 4487 const u8 *ssidie, *ht_ie, *vht_ie;
2a33bee2 4488 int i, err;
f0706e82 4489
66e67e41
JB		 4490 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4491 if (!assoc_data)
4492 return -ENOMEM;
4493
9caf0364
JB		 4494 rcu_read_lock();
4495 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4496 if (!ssidie) {
4497 rcu_read_unlock();
4498 kfree(assoc_data);
4499 return -EINVAL;
4500 }
4501 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4502 assoc_data->ssid_len = ssidie[1];
4503 rcu_read_unlock();
4504
7b119dc0
JB		 4505 if (ifmgd->associated) {
4506 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4507
4508 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4509 WLAN_REASON_UNSPECIFIED,
4510 false, frame_buf);
4511
6ff57cf8
JB		 4512 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4513 sizeof(frame_buf));
7b119dc0 4514 }
66e67e41
JB		 4515
4516 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4517 err = -EBUSY;
4518 goto err_free;
af6b6374 4519 }
77fdaa12 4520
66e67e41
JB		 4521 if (ifmgd->assoc_data) {
4522 err = -EBUSY;
4523 goto err_free;
4524 }
77fdaa12 4525
66e67e41
JB		 4526 if (ifmgd->auth_data) {
4527 bool match;
4528
4529 /* keep sta info, bssid if matching */
b203ca39 4530 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
66e67e41 4531 ieee80211_destroy_auth_data(sdata, match);
2a33bee2
GE		 4532 }
4533
66e67e41 4534 /* prepare assoc data */
095d81ce 4535
d8ec4433
JO		 4536 ifmgd->beacon_crc_valid = false;
4537
095d81ce
JB		 4538 assoc_data->wmm = bss->wmm_used &&
4539 (local->hw.queues >= IEEE80211_NUM_ACS);
4540 if (assoc_data->wmm) {
4541 /* try to check validity of WMM params IE */
4542 const struct cfg80211_bss_ies *ies;
4543 const u8 *wp, *start, *end;
4544
4545 rcu_read_lock();
4546 ies = rcu_dereference(req->bss->ies);
4547 start = ies->data;
4548 end = start + ies->len;
4549
4550 while (true) {
4551 wp = cfg80211_find_vendor_ie(
4552 WLAN_OUI_MICROSOFT,
4553 WLAN_OUI_TYPE_MICROSOFT_WMM,
4554 start, end - start);
4555 if (!wp)
4556 break;
4557 start = wp + wp[1] + 2;
4558 /* if this IE is too short, try the next */
4559 if (wp[1] <= 4)
4560 continue;
4561 /* if this IE is WMM params, we found what we wanted */
4562 if (wp[6] == 1)
4563 break;
4564 }
4565
4566 if (!wp || !ieee80211_usable_wmm_params(sdata, wp + 2,
4567 wp[1] - 2)) {
4568 assoc_data->wmm = false;
4569 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
4570 }
4571 rcu_read_unlock();
4572 }
4573
de5036aa
JB		 4574 /*
4575 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4576 * We still associate in non-HT mode (11a/b/g) if any one of these
4577 * ciphers is configured as pairwise.
4578 * We can set this to true for non-11n hardware, that'll be checked
4579 * separately along with the peer capabilities.
4580 */
1c4cb928 4581 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
77fdaa12
JB		 4582 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4583 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
1c4cb928 4584 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
a8243b72 4585 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
d545daba 4586 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
1c4cb928 4587 netdev_info(sdata->dev,
d545daba 4588 "disabling HT/VHT due to WEP/TKIP use\n");
1c4cb928
JB		 4589 }
4590 }
77fdaa12 4591
d545daba 4592 if (req->flags & ASSOC_REQ_DISABLE_HT) {
a8243b72 4593 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
d545daba
MP		 4594 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4595 }
ef96a842 4596
dd5ecfea
JB		 4597 if (req->flags & ASSOC_REQ_DISABLE_VHT)
4598 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4599
4e74bfdb
JB		 4600 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4601 sband = local->hw.wiphy->bands[req->bss->channel->band];
4602 if (!sband->ht_cap.ht_supported ||
095d81ce
JB		 4603 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4604 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
a8243b72 4605 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
095d81ce
JB		 4606 if (!bss->wmm_used &&
4607 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
1b49de26
JB		 4608 netdev_info(sdata->dev,
4609 "disabling HT as WMM/QoS is not supported by the AP\n");
1c4cb928 4610 }
4e74bfdb 4611
d545daba
MP		 4612 /* disable VHT if we don't support it or the AP doesn't use WMM */
4613 if (!sband->vht_cap.vht_supported ||
095d81ce
JB		 4614 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4615 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
d545daba 4616 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
095d81ce
JB		 4617 if (!bss->wmm_used &&
4618 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
1b49de26
JB		 4619 netdev_info(sdata->dev,
4620 "disabling VHT as WMM/QoS is not supported by the AP\n");
d545daba
MP		 4621 }
4622
ef96a842
BG		 4623 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4624 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4625 sizeof(ifmgd->ht_capa_mask));
4626
dd5ecfea
JB		 4627 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4628 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4629 sizeof(ifmgd->vht_capa_mask));
4630
77fdaa12 4631 if (req->ie && req->ie_len) {
66e67e41
JB		 4632 memcpy(assoc_data->ie, req->ie, req->ie_len);
4633 assoc_data->ie_len = req->ie_len;
4634 }
f679f65d 4635
66e67e41 4636 assoc_data->bss = req->bss;
f679f65d 4637
af6b6374
JB		 4638 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4639 if (ifmgd->powersave)
04ecd257 4640 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
af6b6374 4641 else
04ecd257 4642 sdata->smps_mode = IEEE80211_SMPS_OFF;
af6b6374 4643 } else
04ecd257 4644 sdata->smps_mode = ifmgd->req_smps;
af6b6374 4645
66e67e41 4646 assoc_data->capability = req->bss->capability;
66e67e41
JB		 4647 assoc_data->supp_rates = bss->supp_rates;
4648 assoc_data->supp_rates_len = bss->supp_rates_len;
9dde6423 4649
9caf0364 4650 rcu_read_lock();
9dde6423
JB		 4651 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4652 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4653 assoc_data->ap_ht_param =
4654 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4655 else
a8243b72 4656 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
b08fbbd8
JB		 4657 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4658 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4659 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4660 sizeof(struct ieee80211_vht_cap));
4661 else
4662 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
9caf0364 4663 rcu_read_unlock();
63f170e0 4664
ab13315a 4665 if (bss->wmm_used && bss->uapsd_supported &&
bb512ad0 4666 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
76f0303d 4667 assoc_data->uapsd = true;
ab13315a
KV		 4668 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4669 } else {
76f0303d 4670 assoc_data->uapsd = false;
ab13315a
KV		 4671 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4672 }
4673
77fdaa12 4674 if (req->prev_bssid)
66e67e41 4675 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12
JB		 4676
4677 if (req->use_mfp) {
4678 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4679 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4680 } else {
4681 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4682 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4683 }
4684
cd2f5dd7
AK		 4685 if (req->flags & ASSOC_REQ_USE_RRM)
4686 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
4687 else
4688 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
4689
77fdaa12
JB		 4690 if (req->crypto.control_port)
4691 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4692 else
4693 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4694
a621fa4d
JB		 4695 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4696 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
2475b1cc
MS		 4697 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
4698 sdata->vif.type);
a621fa4d 4699
66e67e41
JB		 4700 /* kick off associate process */
4701
4702 ifmgd->assoc_data = assoc_data;
826262c3 4703 ifmgd->dtim_period = 0;
989c6505 4704 ifmgd->have_beacon = false;
66e67e41 4705
a1cf775d
JB		 4706 err = ieee80211_prep_connection(sdata, req->bss, true);
4707 if (err)
4708 goto err_clear;
66e67e41 4709
c65dd147
EG		 4710 rcu_read_lock();
4711 beacon_ies = rcu_dereference(req->bss->beacon_ies);
826262c3 4712
c65dd147
EG		 4713 if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC &&
4714 !beacon_ies) {
4715 /*
4716 * Wait up to one beacon interval ...
4717 * should this be more if we miss one?
4718 */
4719 sdata_info(sdata, "waiting for beacon from %pM\n",
4720 ifmgd->bssid);
4721 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
89afe614 4722 assoc_data->timeout_started = true;
c65dd147
EG		 4723 assoc_data->need_beacon = true;
4724 } else if (beacon_ies) {
4725 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4726 beacon_ies->data,
4727 beacon_ies->len);
ef429dad
JB		 4728 u8 dtim_count = 0;
4729
c65dd147
EG		 4730 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4731 const struct ieee80211_tim_ie *tim;
4732 tim = (void *)(tim_ie + 2);
4733 ifmgd->dtim_period = tim->dtim_period;
ef429dad 4734 dtim_count = tim->dtim_count;
826262c3 4735 }
989c6505 4736 ifmgd->have_beacon = true;
66e67e41 4737 assoc_data->timeout = jiffies;
89afe614 4738 assoc_data->timeout_started = true;
ef429dad
JB		 4739
4740 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
4741 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4742 sdata->vif.bss_conf.sync_device_ts =
4743 bss->device_ts_beacon;
4744 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4745 }
c65dd147
EG		 4746 } else {
4747 assoc_data->timeout = jiffies;
89afe614 4748 assoc_data->timeout_started = true;
66e67e41 4749 }
c65dd147
EG		 4750 rcu_read_unlock();
4751
8d61ffa5 4752 run_again(sdata, assoc_data->timeout);
66e67e41 4753
fcff4f10
PS		 4754 if (bss->corrupt_data) {
4755 char *corrupt_type = "data";
4756 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4757 if (bss->corrupt_data &
4758 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4759 corrupt_type = "beacon and probe response";
4760 else
4761 corrupt_type = "beacon";
4762 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4763 corrupt_type = "probe response";
bdcbd8e0
JB		 4764 sdata_info(sdata, "associating with AP with corrupt %s\n",
4765 corrupt_type);
fcff4f10
PS		 4766 }
4767
8d61ffa5 4768 return 0;
66e67e41 4769 err_clear:
3d2abdfd
EP		 4770 memset(ifmgd->bssid, 0, ETH_ALEN);
4771 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 4772 ifmgd->assoc_data = NULL;
4773 err_free:
4774 kfree(assoc_data);
66e67e41 4775 return err;
f0706e82
JB		 4776}
4777
77fdaa12 4778int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
63c9c5e7 4779 struct cfg80211_deauth_request *req)
f0706e82 4780{
46900298 4781 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 4782 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
6863255b 4783 bool tx = !req->local_state_change;
f0706e82 4784
c9c3a060
JB		 4785 if (ifmgd->auth_data &&
4786 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
4787 sdata_info(sdata,
4788 "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
4789 req->bssid, req->reason_code,
4790 ieee80211_get_reason_code_string(req->reason_code));
0ff71613 4791
8c7d857c 4792 drv_mgd_prepare_tx(sdata->local, sdata);
37ad3888
JB		 4793 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4794 IEEE80211_STYPE_DEAUTH,
6863255b 4795 req->reason_code, tx,
37ad3888 4796 frame_buf);
86552017 4797 ieee80211_destroy_auth_data(sdata, false);
c9c3a060
JB		 4798 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4799 IEEE80211_DEAUTH_FRAME_LEN);
86552017 4800
c9c3a060 4801 return 0;
8c7d857c
EG		 4802 }
4803
86552017
JB		 4804 if (ifmgd->associated &&
4805 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
c9c3a060
JB		 4806 sdata_info(sdata,
4807 "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
4808 req->bssid, req->reason_code,
4809 ieee80211_get_reason_code_string(req->reason_code));
4810
86552017
JB		 4811 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4812 req->reason_code, tx, frame_buf);
6ff57cf8
JB		 4813 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4814 IEEE80211_DEAUTH_FRAME_LEN);
c9c3a060
JB		 4815 return 0;
4816 }
86552017 4817
c9c3a060 4818 return -ENOTCONN;
f0706e82 4819}
84363e6e 4820
77fdaa12 4821int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 4822 struct cfg80211_disassoc_request *req)
9c6bd790 4823{
77fdaa12 4824 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 4825 u8 bssid[ETH_ALEN];
6ae16775 4826 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
9c6bd790 4827
8d8b261a
JB		 4828 /*
4829 * cfg80211 should catch this ... but it's racy since
4830 * we can receive a disassoc frame, process it, hand it
4831 * to cfg80211 while that's in a locked section already
4832 * trying to tell us that the user wants to disconnect.
4833 */
8d61ffa5 4834 if (ifmgd->associated != req->bss)
77fdaa12 4835 return -ENOLINK;
77fdaa12 4836
bdcbd8e0 4837 sdata_info(sdata,
dfa1ad29
CO		 4838 "disassociating from %pM by local choice (Reason: %u=%s)\n",
4839 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
0ff71613 4840
e69e95db 4841 memcpy(bssid, req->bss->bssid, ETH_ALEN);
37ad3888
JB		 4842 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4843 req->reason_code, !req->local_state_change,
4844 frame_buf);
10f644a4 4845
6ff57cf8
JB		 4846 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4847 IEEE80211_DEAUTH_FRAME_LEN);
bc83b681 4848
10f644a4
JB		 4849 return 0;
4850}
026331c4 4851
afa762f6 4852void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
54e4ffb2
JB		 4853{
4854 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4855
49921859
BG		 4856 /*
4857 * Make sure some work items will not run after this,
4858 * they will not do anything but might not have been
4859 * cancelled when disconnecting.
4860 */
4861 cancel_work_sync(&ifmgd->monitor_work);
4862 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
4863 cancel_work_sync(&ifmgd->request_smps_work);
4864 cancel_work_sync(&ifmgd->csa_connection_drop_work);
4865 cancel_work_sync(&ifmgd->chswitch_work);
81dd2b88 4866 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
49921859 4867
8d61ffa5 4868 sdata_lock(sdata);
959867fa
JB		 4869 if (ifmgd->assoc_data) {
4870 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
54e4ffb2 4871 ieee80211_destroy_assoc_data(sdata, false);
959867fa
JB		 4872 cfg80211_assoc_timeout(sdata->dev, bss);
4873 }
54e4ffb2
JB		 4874 if (ifmgd->auth_data)
4875 ieee80211_destroy_auth_data(sdata, false);
1277b4a9
LK		 4876 spin_lock_bh(&ifmgd->teardown_lock);
4877 if (ifmgd->teardown_skb) {
4878 kfree_skb(ifmgd->teardown_skb);
4879 ifmgd->teardown_skb = NULL;
4880 ifmgd->orig_teardown_skb = NULL;
4881 }
4882 spin_unlock_bh(&ifmgd->teardown_lock);
54e4ffb2 4883 del_timer_sync(&ifmgd->timer);
8d61ffa5 4884 sdata_unlock(sdata);
54e4ffb2
JB		 4885}
4886
a97c13c3
JO		 4887void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
4888 enum nl80211_cqm_rssi_threshold_event rssi_event,
4889 gfp_t gfp)
4890{
4891 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4892
b5878a2d
JB		 4893 trace_api_cqm_rssi_notify(sdata, rssi_event);
4894
a97c13c3
JO		 4895 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
4896}
4897EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
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