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mac80211: Add RRM support to assoc request
[mirror_ubuntu-jammy-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))) {
176 ret = IEEE80211_STA_DISABLE_40MHZ | IEEE80211_STA_DISABLE_VHT;
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,
778 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
779 };
780 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
781 before_ht, ARRAY_SIZE(before_ht),
782 offset);
783 pos = skb_put(skb, noffset - offset);
784 memcpy(pos, assoc_data->ie + offset, noffset - offset);
785 offset = noffset;
786 }
787
f2d9d270
JB		 788 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
789 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
790 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
791
a8243b72 792 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
9dde6423 793 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
04ecd257 794 sband, chan, sdata->smps_mode);
66e67e41 795
3de3802c
JB		 796 /* if present, add any custom IEs that go before VHT */
797 if (assoc_data->ie_len) {
798 static const u8 before_vht[] = {
799 WLAN_EID_SSID,
800 WLAN_EID_SUPP_RATES,
801 WLAN_EID_EXT_SUPP_RATES,
802 WLAN_EID_PWR_CAPABILITY,
803 WLAN_EID_SUPPORTED_CHANNELS,
804 WLAN_EID_RSN,
805 WLAN_EID_QOS_CAPA,
806 WLAN_EID_RRM_ENABLED_CAPABILITIES,
807 WLAN_EID_MOBILITY_DOMAIN,
808 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
809 WLAN_EID_HT_CAPABILITY,
810 WLAN_EID_BSS_COEX_2040,
811 WLAN_EID_EXT_CAPABILITY,
812 WLAN_EID_QOS_TRAFFIC_CAPA,
813 WLAN_EID_TIM_BCAST_REQ,
814 WLAN_EID_INTERWORKING,
815 };
816 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
817 before_vht, ARRAY_SIZE(before_vht),
818 offset);
819 pos = skb_put(skb, noffset - offset);
820 memcpy(pos, assoc_data->ie + offset, noffset - offset);
821 offset = noffset;
822 }
823
d545daba 824 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
b08fbbd8
JB		 825 ieee80211_add_vht_ie(sdata, skb, sband,
826 &assoc_data->ap_vht_cap);
d545daba 827
66e67e41 828 /* if present, add any custom non-vendor IEs that go after HT */
b3f51e94 829 if (assoc_data->ie_len) {
66e67e41
JB		 830 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
831 assoc_data->ie_len,
832 offset);
833 pos = skb_put(skb, noffset - offset);
834 memcpy(pos, assoc_data->ie + offset, noffset - offset);
835 offset = noffset;
836 }
837
76f0303d
JB		 838 if (assoc_data->wmm) {
839 if (assoc_data->uapsd) {
dc41e4d4
EP		 840 qos_info = ifmgd->uapsd_queues;
841 qos_info |= (ifmgd->uapsd_max_sp_len <<
66e67e41
JB		 842 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
843 } else {
844 qos_info = 0;
845 }
846
40b861a0 847 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
66e67e41
JB		 848 }
849
850 /* add any remaining custom (i.e. vendor specific here) IEs */
b3f51e94 851 if (assoc_data->ie_len) {
66e67e41
JB		 852 noffset = assoc_data->ie_len;
853 pos = skb_put(skb, noffset - offset);
854 memcpy(pos, assoc_data->ie + offset, noffset - offset);
855 }
856
a1845fc7
JB		 857 drv_mgd_prepare_tx(local, sdata);
858
66e67e41 859 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1672c0e3
JB		 860 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
861 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
862 IEEE80211_TX_INTFL_MLME_CONN_TX;
66e67e41
JB		 863 ieee80211_tx_skb(sdata, skb);
864}
865
572e0012
KV		 866void ieee80211_send_pspoll(struct ieee80211_local *local,
867 struct ieee80211_sub_if_data *sdata)
868{
572e0012
KV		 869 struct ieee80211_pspoll *pspoll;
870 struct sk_buff *skb;
572e0012 871
d8cd189e
KV		 872 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
873 if (!skb)
572e0012 874 return;
572e0012 875
d8cd189e
KV		 876 pspoll = (struct ieee80211_pspoll *) skb->data;
877 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
572e0012 878
62ae67be
JB		 879 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
880 ieee80211_tx_skb(sdata, skb);
572e0012
KV		 881}
882
965bedad
JB		 883void ieee80211_send_nullfunc(struct ieee80211_local *local,
884 struct ieee80211_sub_if_data *sdata,
885 int powersave)
886{
887 struct sk_buff *skb;
d8cd189e 888 struct ieee80211_hdr_3addr *nullfunc;
b6f35301 889 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
965bedad 890
d8cd189e
KV		 891 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
892 if (!skb)
965bedad 893 return;
965bedad 894
d8cd189e 895 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
965bedad 896 if (powersave)
d8cd189e 897 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
965bedad 898
6c17b77b
SF		 899 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
900 IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
ff40b425
PF		 901
902 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
903 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
904
392b9ffb 905 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
b6f35301
RM		 906 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
907
62ae67be 908 ieee80211_tx_skb(sdata, skb);
965bedad
JB		 909}
910
d524215f
FF		 911static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
912 struct ieee80211_sub_if_data *sdata)
913{
914 struct sk_buff *skb;
915 struct ieee80211_hdr *nullfunc;
916 __le16 fc;
917
918 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
919 return;
920
921 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
d15b8459 922 if (!skb)
d524215f 923 return;
d15b8459 924
d524215f
FF		 925 skb_reserve(skb, local->hw.extra_tx_headroom);
926
927 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
928 memset(nullfunc, 0, 30);
929 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
930 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
931 nullfunc->frame_control = fc;
932 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
933 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
934 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
935 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
936
937 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
938 ieee80211_tx_skb(sdata, skb);
939}
940
cc32abd4
JB		 941/* spectrum management related things */
942static void ieee80211_chswitch_work(struct work_struct *work)
943{
944 struct ieee80211_sub_if_data *sdata =
945 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
675a0b04 946 struct ieee80211_local *local = sdata->local;
cc32abd4 947 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
7578d575 948 int ret;
cc32abd4 949
9607e6b6 950 if (!ieee80211_sdata_running(sdata))
cc32abd4
JB		 951 return;
952
8d61ffa5 953 sdata_lock(sdata);
4c3ebc56
MK		 954 mutex_lock(&local->mtx);
955 mutex_lock(&local->chanctx_mtx);
956
77fdaa12
JB		 957 if (!ifmgd->associated)
958 goto out;
cc32abd4 959
4c3ebc56
MK		 960 if (!sdata->vif.csa_active)
961 goto out;
962
963 /*
964 * using reservation isn't immediate as it may be deferred until later
965 * with multi-vif. once reservation is complete it will re-schedule the
966 * work with no reserved_chanctx so verify chandef to check if it
967 * completed successfully
968 */
969
970 if (sdata->reserved_chanctx) {
971 /*
972 * with multi-vif csa driver may call ieee80211_csa_finish()
973 * many times while waiting for other interfaces to use their
974 * reservations
975 */
976 if (sdata->reserved_ready)
977 goto out;
978
979 ret = ieee80211_vif_use_reserved_context(sdata);
980 if (ret) {
981 sdata_info(sdata,
982 "failed to use reserved channel context, disconnecting (err=%d)\n",
983 ret);
984 ieee80211_queue_work(&sdata->local->hw,
985 &ifmgd->csa_connection_drop_work);
986 goto out;
987 }
988
989 goto out;
990 }
991
992 if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
993 &sdata->csa_chandef)) {
7578d575 994 sdata_info(sdata,
4c3ebc56 995 "failed to finalize channel switch, disconnecting\n");
7578d575
AN		 996 ieee80211_queue_work(&sdata->local->hw,
997 &ifmgd->csa_connection_drop_work);
998 goto out;
999 }
675a0b04 1000
cc32abd4 1001 /* XXX: shouldn't really modify cfg80211-owned data! */
33787fc4 1002 ifmgd->associated->channel = sdata->csa_chandef.chan;
cc32abd4 1003
59af6928 1004 sdata->vif.csa_active = false;
4c3ebc56 1005
57eebdf3 1006 /* XXX: wait for a beacon first? */
a46992b4
LC		 1007 if (sdata->csa_block_tx) {
1008 ieee80211_wake_vif_queues(local, sdata,
1009 IEEE80211_QUEUE_STOP_REASON_CSA);
1010 sdata->csa_block_tx = false;
1011 }
7578d575 1012
e5593f56
MK		 1013 ieee80211_sta_reset_beacon_monitor(sdata);
1014 ieee80211_sta_reset_conn_monitor(sdata);
1015
59af6928 1016out:
4c3ebc56
MK		 1017 mutex_unlock(&local->chanctx_mtx);
1018 mutex_unlock(&local->mtx);
8d61ffa5 1019 sdata_unlock(sdata);
cc32abd4
JB		 1020}
1021
5ce6e438
JB		 1022void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1023{
55de908a
JB		 1024 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1025 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5ce6e438
JB		 1026
1027 trace_api_chswitch_done(sdata, success);
1028 if (!success) {
882a7c69
JB		 1029 sdata_info(sdata,
1030 "driver channel switch failed, disconnecting\n");
1031 ieee80211_queue_work(&sdata->local->hw,
1032 &ifmgd->csa_connection_drop_work);
1033 } else {
1034 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
5ce6e438 1035 }
5ce6e438
JB		 1036}
1037EXPORT_SYMBOL(ieee80211_chswitch_done);
1038
cc32abd4
JB		 1039static void ieee80211_chswitch_timer(unsigned long data)
1040{
1041 struct ieee80211_sub_if_data *sdata =
1042 (struct ieee80211_sub_if_data *) data;
5bb644a0 1043
9b7d72c1 1044 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
cc32abd4
JB		 1045}
1046
37799e52 1047static void
4a3cb702 1048ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
04a161f4
JB		 1049 u64 timestamp, struct ieee802_11_elems *elems,
1050 bool beacon)
cc32abd4 1051{
b4f286a1 1052 struct ieee80211_local *local = sdata->local;
cc32abd4 1053 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
37799e52 1054 struct cfg80211_bss *cbss = ifmgd->associated;
4c3ebc56 1055 struct ieee80211_chanctx_conf *conf;
55de908a 1056 struct ieee80211_chanctx *chanctx;
e6b7cde4 1057 enum ieee80211_band current_band;
c0f17eb9 1058 struct ieee80211_csa_ie csa_ie;
e6b7cde4 1059 int res;
cc32abd4 1060
8d61ffa5 1061 sdata_assert_lock(sdata);
77fdaa12 1062
37799e52 1063 if (!cbss)
cc32abd4
JB		 1064 return;
1065
b4f286a1 1066 if (local->scanning)
cc32abd4
JB		 1067 return;
1068
37799e52 1069 /* disregard subsequent announcements if we are already processing */
3e2a0226 1070 if (sdata->vif.csa_active)
cc32abd4
JB		 1071 return;
1072
e6b7cde4 1073 current_band = cbss->channel->band;
c0f17eb9 1074 memset(&csa_ie, 0, sizeof(csa_ie));
e6b7cde4
SW		 1075 res = ieee80211_parse_ch_switch_ie(sdata, elems, beacon, current_band,
1076 ifmgd->flags,
c0f17eb9 1077 ifmgd->associated->bssid, &csa_ie);
e6b7cde4 1078 if (res < 0)
b4f286a1 1079 ieee80211_queue_work(&local->hw,
882a7c69 1080 &ifmgd->csa_connection_drop_work);
e6b7cde4 1081 if (res)
cc32abd4 1082 return;
cd64f2a9 1083
c0f17eb9 1084 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
85220d71
JB		 1085 IEEE80211_CHAN_DISABLED)) {
1086 sdata_info(sdata,
1087 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
e6b7cde4 1088 ifmgd->associated->bssid,
c0f17eb9
CYY		 1089 csa_ie.chandef.chan->center_freq,
1090 csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1091 csa_ie.chandef.center_freq2);
85220d71
JB		 1092 ieee80211_queue_work(&local->hw,
1093 &ifmgd->csa_connection_drop_work);
1094 return;
1095 }
1096
4c3ebc56 1097 mutex_lock(&local->mtx);
7578d575 1098 mutex_lock(&local->chanctx_mtx);
4c3ebc56
MK		 1099 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1100 lockdep_is_held(&local->chanctx_mtx));
1101 if (!conf) {
1102 sdata_info(sdata,
1103 "no channel context assigned to vif?, disconnecting\n");
1104 ieee80211_queue_work(&local->hw,
1105 &ifmgd->csa_connection_drop_work);
1106 mutex_unlock(&local->chanctx_mtx);
1107 mutex_unlock(&local->mtx);
1108 return;
1109 }
1110
1111 chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1112
b4f286a1 1113 if (local->use_chanctx) {
7578d575
AN		 1114 u32 num_chanctx = 0;
1115 list_for_each_entry(chanctx, &local->chanctx_list, list)
1116 num_chanctx++;
1117
1118 if (num_chanctx > 1 ||
1119 !(local->hw.flags & IEEE80211_HW_CHANCTX_STA_CSA)) {
1120 sdata_info(sdata,
1121 "not handling chan-switch with channel contexts\n");
1122 ieee80211_queue_work(&local->hw,
1123 &ifmgd->csa_connection_drop_work);
1124 mutex_unlock(&local->chanctx_mtx);
4c3ebc56 1125 mutex_unlock(&local->mtx);
7578d575
AN		 1126 return;
1127 }
55de908a
JB		 1128 }
1129
4c3ebc56
MK		 1130 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1131 chanctx->mode, false);
1132 if (res) {
55de908a 1133 sdata_info(sdata,
4c3ebc56
MK		 1134 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1135 res);
b4f286a1 1136 ieee80211_queue_work(&local->hw,
55de908a 1137 &ifmgd->csa_connection_drop_work);
b4f286a1 1138 mutex_unlock(&local->chanctx_mtx);
4c3ebc56 1139 mutex_unlock(&local->mtx);
55de908a
JB		 1140 return;
1141 }
b4f286a1 1142 mutex_unlock(&local->chanctx_mtx);
55de908a 1143
c46a73f3 1144 sdata->vif.csa_active = true;
4c3ebc56 1145 sdata->csa_chandef = csa_ie.chandef;
59af6928 1146 sdata->csa_block_tx = csa_ie.mode;
55de908a 1147
59af6928 1148 if (sdata->csa_block_tx)
a46992b4
LC		 1149 ieee80211_stop_vif_queues(local, sdata,
1150 IEEE80211_QUEUE_STOP_REASON_CSA);
59af6928 1151 mutex_unlock(&local->mtx);
57eebdf3 1152
b4f286a1 1153 if (local->ops->channel_switch) {
5ce6e438 1154 /* use driver's channel switch callback */
57eebdf3
JB		 1155 struct ieee80211_channel_switch ch_switch = {
1156 .timestamp = timestamp,
c0f17eb9
CYY		 1157 .block_tx = csa_ie.mode,
1158 .chandef = csa_ie.chandef,
1159 .count = csa_ie.count,
57eebdf3
JB		 1160 };
1161
b4f286a1 1162 drv_channel_switch(local, &ch_switch);
5ce6e438
JB		 1163 return;
1164 }
1165
1166 /* channel switch handled in software */
c0f17eb9 1167 if (csa_ie.count <= 1)
b4f286a1 1168 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
57eebdf3 1169 else
cc32abd4 1170 mod_timer(&ifmgd->chswitch_timer,
c0f17eb9 1171 TU_TO_EXP_TIME(csa_ie.count * cbss->beacon_interval));
cc32abd4
JB		 1172}
1173
1ea6f9c0
JB		 1174static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1175 struct ieee80211_channel *channel,
1176 const u8 *country_ie, u8 country_ie_len,
1177 const u8 *pwr_constr_elem)
cc32abd4 1178{
04b7b2ff
JB		 1179 struct ieee80211_country_ie_triplet *triplet;
1180 int chan = ieee80211_frequency_to_channel(channel->center_freq);
1181 int i, chan_pwr, chan_increment, new_ap_level;
1182 bool have_chan_pwr = false;
cc32abd4 1183
04b7b2ff
JB		 1184 /* Invalid IE */
1185 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1ea6f9c0 1186 return 0;
cc32abd4 1187
04b7b2ff
JB		 1188 triplet = (void *)(country_ie + 3);
1189 country_ie_len -= 3;
1190
1191 switch (channel->band) {
1192 default:
1193 WARN_ON_ONCE(1);
1194 /* fall through */
1195 case IEEE80211_BAND_2GHZ:
1196 case IEEE80211_BAND_60GHZ:
1197 chan_increment = 1;
1198 break;
1199 case IEEE80211_BAND_5GHZ:
1200 chan_increment = 4;
1201 break;
cc32abd4 1202 }
04b7b2ff
JB		 1203
1204 /* find channel */
1205 while (country_ie_len >= 3) {
1206 u8 first_channel = triplet->chans.first_channel;
1207
1208 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1209 goto next;
1210
1211 for (i = 0; i < triplet->chans.num_channels; i++) {
1212 if (first_channel + i * chan_increment == chan) {
1213 have_chan_pwr = true;
1214 chan_pwr = triplet->chans.max_power;
1215 break;
1216 }
1217 }
1218 if (have_chan_pwr)
1219 break;
1220
1221 next:
1222 triplet++;
1223 country_ie_len -= 3;
1224 }
1225
1226 if (!have_chan_pwr)
1ea6f9c0 1227 return 0;
04b7b2ff
JB		 1228
1229 new_ap_level = max_t(int, 0, chan_pwr - *pwr_constr_elem);
1230
1ea6f9c0
JB		 1231 if (sdata->ap_power_level == new_ap_level)
1232 return 0;
04b7b2ff
JB		 1233
1234 sdata_info(sdata,
1235 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1236 new_ap_level, chan_pwr, *pwr_constr_elem,
1237 sdata->u.mgd.bssid);
1ea6f9c0
JB		 1238 sdata->ap_power_level = new_ap_level;
1239 if (__ieee80211_recalc_txpower(sdata))
1240 return BSS_CHANGED_TXPOWER;
1241 return 0;
cc32abd4
JB		 1242}
1243
965bedad
JB		 1244/* powersave */
1245static void ieee80211_enable_ps(struct ieee80211_local *local,
1246 struct ieee80211_sub_if_data *sdata)
1247{
1248 struct ieee80211_conf *conf = &local->hw.conf;
1249
d5edaedc
JB		 1250 /*
1251 * If we are scanning right now then the parameters will
1252 * take effect when scan finishes.
1253 */
fbe9c429 1254 if (local->scanning)
d5edaedc
JB		 1255 return;
1256
965bedad
JB		 1257 if (conf->dynamic_ps_timeout > 0 &&
1258 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
1259 mod_timer(&local->dynamic_ps_timer, jiffies +
1260 msecs_to_jiffies(conf->dynamic_ps_timeout));
1261 } else {
1262 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1263 ieee80211_send_nullfunc(local, sdata, 1);
375177bf 1264
2a13052f
JO		 1265 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1266 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
1267 return;
1268
1269 conf->flags |= IEEE80211_CONF_PS;
1270 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965bedad
JB		 1271 }
1272}
1273
1274static void ieee80211_change_ps(struct ieee80211_local *local)
1275{
1276 struct ieee80211_conf *conf = &local->hw.conf;
1277
1278 if (local->ps_sdata) {
965bedad
JB		 1279 ieee80211_enable_ps(local, local->ps_sdata);
1280 } else if (conf->flags & IEEE80211_CONF_PS) {
1281 conf->flags &= ~IEEE80211_CONF_PS;
1282 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1283 del_timer_sync(&local->dynamic_ps_timer);
1284 cancel_work_sync(&local->dynamic_ps_enable_work);
1285 }
1286}
1287
808118cb
JY		 1288static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1289{
1290 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1291 struct sta_info *sta = NULL;
c2c98fde 1292 bool authorized = false;
808118cb
JY		 1293
1294 if (!mgd->powersave)
1295 return false;
1296
05cb9108
JB		 1297 if (mgd->broken_ap)
1298 return false;
1299
808118cb
JY		 1300 if (!mgd->associated)
1301 return false;
1302
392b9ffb 1303 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
808118cb
JY		 1304 return false;
1305
989c6505 1306 if (!mgd->have_beacon)
ce857888
AB		 1307 return false;
1308
808118cb
JY		 1309 rcu_read_lock();
1310 sta = sta_info_get(sdata, mgd->bssid);
1311 if (sta)
c2c98fde 1312 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
808118cb
JY		 1313 rcu_read_unlock();
1314
c2c98fde 1315 return authorized;
808118cb
JY		 1316}
1317
965bedad 1318/* need to hold RTNL or interface lock */
10f644a4 1319void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 1320{
1321 struct ieee80211_sub_if_data *sdata, *found = NULL;
1322 int count = 0;
195e294d 1323 int timeout;
965bedad
JB		 1324
1325 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
1326 local->ps_sdata = NULL;
1327 return;
1328 }
1329
1330 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 1331 if (!ieee80211_sdata_running(sdata))
965bedad 1332 continue;
8c7914de
RM		 1333 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1334 /* If an AP vif is found, then disable PS
1335 * by setting the count to zero thereby setting
1336 * ps_sdata to NULL.
1337 */
1338 count = 0;
1339 break;
1340 }
965bedad
JB		 1341 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1342 continue;
1343 found = sdata;
1344 count++;
1345 }
1346
808118cb 1347 if (count == 1 && ieee80211_powersave_allowed(found)) {
10f644a4
JB		 1348 s32 beaconint_us;
1349
1350 if (latency < 0)
ed77134b 1351 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
10f644a4
JB		 1352
1353 beaconint_us = ieee80211_tu_to_usec(
1354 found->vif.bss_conf.beacon_int);
1355
ff616381 1356 timeout = local->dynamic_ps_forced_timeout;
195e294d
JO		 1357 if (timeout < 0) {
1358 /*
ff616381
JO		 1359 * Go to full PSM if the user configures a very low
1360 * latency requirement.
0ab82b04
EP		 1361 * The 2000 second value is there for compatibility
1362 * until the PM_QOS_NETWORK_LATENCY is configured
1363 * with real values.
195e294d 1364 */
0ab82b04
EP		 1365 if (latency > (1900 * USEC_PER_MSEC) &&
1366 latency != (2000 * USEC_PER_SEC))
195e294d 1367 timeout = 0;
ff616381
JO		 1368 else
1369 timeout = 100;
195e294d 1370 }
09b85568 1371 local->hw.conf.dynamic_ps_timeout = timeout;
195e294d 1372
04fe2037 1373 if (beaconint_us > latency) {
10f644a4 1374 local->ps_sdata = NULL;
04fe2037 1375 } else {
04fe2037 1376 int maxslp = 1;
826262c3 1377 u8 dtimper = found->u.mgd.dtim_period;
56007a02
JB		 1378
1379 /* If the TIM IE is invalid, pretend the value is 1 */
1380 if (!dtimper)
1381 dtimper = 1;
1382 else if (dtimper > 1)
04fe2037
JB		 1383 maxslp = min_t(int, dtimper,
1384 latency / beaconint_us);
1385
9ccebe61 1386 local->hw.conf.max_sleep_period = maxslp;
56007a02 1387 local->hw.conf.ps_dtim_period = dtimper;
10f644a4 1388 local->ps_sdata = found;
04fe2037 1389 }
10f644a4 1390 } else {
965bedad 1391 local->ps_sdata = NULL;
10f644a4 1392 }
965bedad
JB		 1393
1394 ieee80211_change_ps(local);
1395}
1396
ab095877
EP		 1397void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1398{
1399 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1400
1401 if (sdata->vif.bss_conf.ps != ps_allowed) {
1402 sdata->vif.bss_conf.ps = ps_allowed;
1403 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1404 }
1405}
1406
965bedad
JB		 1407void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1408{
1409 struct ieee80211_local *local =
1410 container_of(work, struct ieee80211_local,
1411 dynamic_ps_disable_work);
1412
1413 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1414 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1415 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1416 }
1417
1418 ieee80211_wake_queues_by_reason(&local->hw,
445ea4e8 1419 IEEE80211_MAX_QUEUE_MAP,
cca07b00
LC		 1420 IEEE80211_QUEUE_STOP_REASON_PS,
1421 false);
965bedad
JB		 1422}
1423
1424void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1425{
1426 struct ieee80211_local *local =
1427 container_of(work, struct ieee80211_local,
1428 dynamic_ps_enable_work);
1429 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
5e34069c 1430 struct ieee80211_if_managed *ifmgd;
1ddc2867
RM		 1431 unsigned long flags;
1432 int q;
965bedad
JB		 1433
1434 /* can only happen when PS was just disabled anyway */
1435 if (!sdata)
1436 return;
1437
5e34069c
CL		 1438 ifmgd = &sdata->u.mgd;
1439
965bedad
JB		 1440 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1441 return;
1442
09b85568 1443 if (local->hw.conf.dynamic_ps_timeout > 0) {
77b7023a
AN		 1444 /* don't enter PS if TX frames are pending */
1445 if (drv_tx_frames_pending(local)) {
1ddc2867
RM		 1446 mod_timer(&local->dynamic_ps_timer, jiffies +
1447 msecs_to_jiffies(
1448 local->hw.conf.dynamic_ps_timeout));
1449 return;
1450 }
77b7023a
AN		 1451
1452 /*
1453 * transmission can be stopped by others which leads to
1454 * dynamic_ps_timer expiry. Postpone the ps timer if it
1455 * is not the actual idle state.
1456 */
1457 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1458 for (q = 0; q < local->hw.queues; q++) {
1459 if (local->queue_stop_reasons[q]) {
1460 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1461 flags);
1462 mod_timer(&local->dynamic_ps_timer, jiffies +
1463 msecs_to_jiffies(
1464 local->hw.conf.dynamic_ps_timeout));
1465 return;
1466 }
1467 }
1468 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1ddc2867 1469 }
1ddc2867 1470
375177bf 1471 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
9c38a8b4 1472 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
a1598383 1473 if (drv_tx_frames_pending(local)) {
e8306f98
VN		 1474 mod_timer(&local->dynamic_ps_timer, jiffies +
1475 msecs_to_jiffies(
1476 local->hw.conf.dynamic_ps_timeout));
a1598383 1477 } else {
e8306f98
VN		 1478 ieee80211_send_nullfunc(local, sdata, 1);
1479 /* Flush to get the tx status of nullfunc frame */
39ecc01d 1480 ieee80211_flush_queues(local, sdata);
e8306f98 1481 }
f3e85b9e
VN		 1482 }
1483
2a13052f
JO		 1484 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1485 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
375177bf
VN		 1486 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1487 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1488 local->hw.conf.flags |= IEEE80211_CONF_PS;
1489 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1490 }
965bedad
JB		 1491}
1492
1493void ieee80211_dynamic_ps_timer(unsigned long data)
1494{
1495 struct ieee80211_local *local = (void *) data;
1496
78f1a8b7 1497 if (local->quiescing || local->suspended)
5bb644a0
JB		 1498 return;
1499
42935eca 1500 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 1501}
1502
164eb02d
SW		 1503void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1504{
1505 struct delayed_work *delayed_work =
1506 container_of(work, struct delayed_work, work);
1507 struct ieee80211_sub_if_data *sdata =
1508 container_of(delayed_work, struct ieee80211_sub_if_data,
1509 dfs_cac_timer_work);
d2859df5 1510 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
164eb02d 1511
34a3740d
JB		 1512 mutex_lock(&sdata->local->mtx);
1513 if (sdata->wdev.cac_started) {
1514 ieee80211_vif_release_channel(sdata);
1515 cfg80211_cac_event(sdata->dev, &chandef,
1516 NL80211_RADAR_CAC_FINISHED,
1517 GFP_KERNEL);
1518 }
1519 mutex_unlock(&sdata->local->mtx);
164eb02d
SW		 1520}
1521
60f8b39c 1522/* MLME */
7d25745d 1523static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
4ced3f74 1524 struct ieee80211_sub_if_data *sdata,
4a3cb702 1525 const u8 *wmm_param, size_t wmm_param_len)
f0706e82 1526{
f0706e82 1527 struct ieee80211_tx_queue_params params;
4ced3f74 1528 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1529 size_t left;
1530 int count;
4a3cb702
JB		 1531 const u8 *pos;
1532 u8 uapsd_queues = 0;
f0706e82 1533
e1b3ec1a 1534 if (!local->ops->conf_tx)
7d25745d 1535 return false;
e1b3ec1a 1536
32c5057b 1537 if (local->hw.queues < IEEE80211_NUM_ACS)
7d25745d 1538 return false;
3434fbd3
JB		 1539
1540 if (!wmm_param)
7d25745d 1541 return false;
3434fbd3 1542
f0706e82 1543 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
7d25745d 1544 return false;
ab13315a
KV		 1545
1546 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
dc41e4d4 1547 uapsd_queues = ifmgd->uapsd_queues;
ab13315a 1548
f0706e82 1549 count = wmm_param[6] & 0x0f;
46900298 1550 if (count == ifmgd->wmm_last_param_set)
7d25745d 1551 return false;
46900298 1552 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 1553
1554 pos = wmm_param + 8;
1555 left = wmm_param_len - 8;
1556
1557 memset(&params, 0, sizeof(params));
1558
00e96dec 1559 sdata->wmm_acm = 0;
f0706e82
JB		 1560 for (; left >= 4; left -= 4, pos += 4) {
1561 int aci = (pos[0] >> 5) & 0x03;
1562 int acm = (pos[0] >> 4) & 0x01;
ab13315a 1563 bool uapsd = false;
f0706e82
JB		 1564 int queue;
1565
1566 switch (aci) {
0eeb59fe 1567 case 1: /* AC_BK */
e100bb64 1568 queue = 3;
988c0f72 1569 if (acm)
00e96dec 1570 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV		 1571 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1572 uapsd = true;
f0706e82 1573 break;
0eeb59fe 1574 case 2: /* AC_VI */
e100bb64 1575 queue = 1;
988c0f72 1576 if (acm)
00e96dec 1577 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV		 1578 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1579 uapsd = true;
f0706e82 1580 break;
0eeb59fe 1581 case 3: /* AC_VO */
e100bb64 1582 queue = 0;
988c0f72 1583 if (acm)
00e96dec 1584 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV		 1585 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1586 uapsd = true;
f0706e82 1587 break;
0eeb59fe 1588 case 0: /* AC_BE */
f0706e82 1589 default:
e100bb64 1590 queue = 2;
988c0f72 1591 if (acm)
00e96dec 1592 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV		 1593 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1594 uapsd = true;
f0706e82
JB		 1595 break;
1596 }
1597
1598 params.aifs = pos[0] & 0x0f;
1599 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1600 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 1601 params.txop = get_unaligned_le16(pos + 2);
908f8d07 1602 params.acm = acm;
ab13315a
KV		 1603 params.uapsd = uapsd;
1604
bdcbd8e0
JB		 1605 mlme_dbg(sdata,
1606 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1607 queue, aci, acm,
1608 params.aifs, params.cw_min, params.cw_max,
1609 params.txop, params.uapsd);
f6f3def3
EP		 1610 sdata->tx_conf[queue] = params;
1611 if (drv_conf_tx(local, sdata, queue, &params))
bdcbd8e0
JB		 1612 sdata_err(sdata,
1613 "failed to set TX queue parameters for queue %d\n",
1614 queue);
f0706e82 1615 }
e1b3ec1a
SG		 1616
1617 /* enable WMM or activate new settings */
4ced3f74 1618 sdata->vif.bss_conf.qos = true;
7d25745d 1619 return true;
f0706e82
JB		 1620}
1621
925e64c3
SG		 1622static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1623{
1624 lockdep_assert_held(&sdata->local->mtx);
1625
392b9ffb 1626 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
925e64c3
SG		 1627 ieee80211_run_deferred_scan(sdata->local);
1628}
1629
1630static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1631{
1632 mutex_lock(&sdata->local->mtx);
1633 __ieee80211_stop_poll(sdata);
1634 mutex_unlock(&sdata->local->mtx);
1635}
1636
7a5158ef
JB		 1637static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1638 u16 capab, bool erp_valid, u8 erp)
5628221c 1639{
bda3933a 1640 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 1641 u32 changed = 0;
7a5158ef
JB		 1642 bool use_protection;
1643 bool use_short_preamble;
1644 bool use_short_slot;
1645
1646 if (erp_valid) {
1647 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1648 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1649 } else {
1650 use_protection = false;
1651 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1652 }
1653
1654 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
55de908a 1655 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
43d35343 1656 use_short_slot = true;
5628221c 1657
471b3efd 1658 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 1659 bss_conf->use_cts_prot = use_protection;
1660 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 1661 }
7e9ed188 1662
d43c7b37 1663 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 1664 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 1665 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 1666 }
d9430a32 1667
7a5158ef 1668 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 1669 bss_conf->use_short_slot = use_short_slot;
1670 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 1671 }
1672
1673 return changed;
1674}
1675
f698d856 1676static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 1677 struct cfg80211_bss *cbss,
ae5eb026 1678 u32 bss_info_changed)
f0706e82 1679{
0c1ad2ca 1680 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 1681 struct ieee80211_local *local = sdata->local;
68542962 1682 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
d6f2da5b 1683
ae5eb026 1684 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 1685 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
50ae34a2 1686 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 1687
7ccc8bd7 1688 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
59c1ec2b 1689 beacon_loss_count * bss_conf->beacon_int));
7ccc8bd7 1690
0c1ad2ca
JB		 1691 sdata->u.mgd.associated = cbss;
1692 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 1693
17e4ec14
JM		 1694 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1695
488dd7b5 1696 if (sdata->vif.p2p) {
9caf0364 1697 const struct cfg80211_bss_ies *ies;
488dd7b5 1698
9caf0364
JB		 1699 rcu_read_lock();
1700 ies = rcu_dereference(cbss->ies);
1701 if (ies) {
9caf0364
JB		 1702 int ret;
1703
1704 ret = cfg80211_get_p2p_attr(
1705 ies->data, ies->len,
1706 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
67baf663
JD		 1707 (u8 *) &bss_conf->p2p_noa_attr,
1708 sizeof(bss_conf->p2p_noa_attr));
9caf0364 1709 if (ret >= 2) {
67baf663
JD		 1710 sdata->u.mgd.p2p_noa_index =
1711 bss_conf->p2p_noa_attr.index;
9caf0364 1712 bss_info_changed |= BSS_CHANGED_P2P_PS;
9caf0364 1713 }
488dd7b5 1714 }
9caf0364 1715 rcu_read_unlock();
488dd7b5
JB		 1716 }
1717
b291ba11 1718 /* just to be sure */
925e64c3 1719 ieee80211_stop_poll(sdata);
b291ba11 1720
9ac19a90 1721 ieee80211_led_assoc(local, 1);
9306102e 1722
989c6505 1723 if (sdata->u.mgd.have_beacon) {
826262c3
JB		 1724 /*
1725 * If the AP is buggy we may get here with no DTIM period
1726 * known, so assume it's 1 which is the only safe assumption
1727 * in that case, although if the TIM IE is broken powersave
1728 * probably just won't work at all.
1729 */
1730 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
817cee76 1731 bss_conf->beacon_rate = bss->beacon_rate;
989c6505 1732 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
826262c3 1733 } else {
817cee76 1734 bss_conf->beacon_rate = NULL;
e5b900d2 1735 bss_conf->dtim_period = 0;
826262c3 1736 }
e5b900d2 1737
68542962 1738 bss_conf->assoc = 1;
9cef8737 1739
a97c13c3 1740 /* Tell the driver to monitor connection quality (if supported) */
ea086359 1741 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
68542962 1742 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 1743 bss_info_changed |= BSS_CHANGED_CQM;
1744
68542962 1745 /* Enable ARP filtering */
0f19b41e 1746 if (bss_conf->arp_addr_cnt)
68542962 1747 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
68542962 1748
ae5eb026 1749 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 1750
056508dc
JB		 1751 mutex_lock(&local->iflist_mtx);
1752 ieee80211_recalc_ps(local, -1);
1753 mutex_unlock(&local->iflist_mtx);
e0cb686f 1754
04ecd257 1755 ieee80211_recalc_smps(sdata);
ab095877
EP		 1756 ieee80211_recalc_ps_vif(sdata);
1757
9ac19a90 1758 netif_carrier_on(sdata->dev);
f0706e82
JB		 1759}
1760
e69e95db 1761static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
37ad3888
JB		 1762 u16 stype, u16 reason, bool tx,
1763 u8 *frame_buf)
aa458d17 1764{
46900298 1765 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17 1766 struct ieee80211_local *local = sdata->local;
3cc5240b 1767 u32 changed = 0;
aa458d17 1768
8d61ffa5 1769 sdata_assert_lock(sdata);
77fdaa12 1770
37ad3888
JB		 1771 if (WARN_ON_ONCE(tx && !frame_buf))
1772 return;
1773
b291ba11
JB		 1774 if (WARN_ON(!ifmgd->associated))
1775 return;
1776
79543d8e
DS		 1777 ieee80211_stop_poll(sdata);
1778
77fdaa12 1779 ifmgd->associated = NULL;
aa458d17
TW		 1780 netif_carrier_off(sdata->dev);
1781
88bc40e8
EP		 1782 /*
1783 * if we want to get out of ps before disassoc (why?) we have
1784 * to do it before sending disassoc, as otherwise the null-packet
1785 * won't be valid.
1786 */
1787 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1788 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1789 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1790 }
1791 local->ps_sdata = NULL;
1792
ab095877
EP		 1793 /* disable per-vif ps */
1794 ieee80211_recalc_ps_vif(sdata);
1795
f823981e
EP		 1796 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1797 if (tx)
39ecc01d 1798 ieee80211_flush_queues(local, sdata);
f823981e 1799
37ad3888
JB		 1800 /* deauthenticate/disassociate now */
1801 if (tx || frame_buf)
88a9e31c
EP		 1802 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
1803 reason, tx, frame_buf);
37ad3888
JB		 1804
1805 /* flush out frame */
1806 if (tx)
39ecc01d 1807 ieee80211_flush_queues(local, sdata);
37ad3888 1808
88a9e31c
EP		 1809 /* clear bssid only after building the needed mgmt frames */
1810 memset(ifmgd->bssid, 0, ETH_ALEN);
1811
37ad3888 1812 /* remove AP and TDLS peers */
d34ba216 1813 sta_info_flush(sdata);
37ad3888
JB		 1814
1815 /* finally reset all BSS / config parameters */
f5e5bf25
TW		 1816 changed |= ieee80211_reset_erp_info(sdata);
1817
f5e5bf25 1818 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 1819 changed |= BSS_CHANGED_ASSOC;
1820 sdata->vif.bss_conf.assoc = false;
f5e5bf25 1821
67baf663
JD		 1822 ifmgd->p2p_noa_index = -1;
1823 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
1824 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
488dd7b5 1825
dd5ecfea 1826 /* on the next assoc, re-program HT/VHT parameters */
ef96a842
BG		 1827 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1828 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
dd5ecfea
JB		 1829 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
1830 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
413ad50a 1831
1ea6f9c0 1832 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
a8302de9 1833
520eb820
KV		 1834 del_timer_sync(&local->dynamic_ps_timer);
1835 cancel_work_sync(&local->dynamic_ps_enable_work);
1836
68542962 1837 /* Disable ARP filtering */
0f19b41e 1838 if (sdata->vif.bss_conf.arp_addr_cnt)
68542962 1839 changed |= BSS_CHANGED_ARP_FILTER;
68542962 1840
3abead59
JB		 1841 sdata->vif.bss_conf.qos = false;
1842 changed |= BSS_CHANGED_QOS;
1843
0aaffa9b
JB		 1844 /* The BSSID (not really interesting) and HT changed */
1845 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 1846 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 1847
3abead59
JB		 1848 /* disassociated - set to defaults now */
1849 ieee80211_set_wmm_default(sdata, false);
1850
b9dcf712
JB		 1851 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1852 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1853 del_timer_sync(&sdata->u.mgd.timer);
1854 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2d9957cc 1855
826262c3 1856 sdata->vif.bss_conf.dtim_period = 0;
817cee76
AB		 1857 sdata->vif.bss_conf.beacon_rate = NULL;
1858
989c6505 1859 ifmgd->have_beacon = false;
826262c3 1860
028e8da0 1861 ifmgd->flags = 0;
34a3740d 1862 mutex_lock(&local->mtx);
028e8da0 1863 ieee80211_vif_release_channel(sdata);
59af6928
MK		 1864
1865 sdata->vif.csa_active = false;
a46992b4
LC		 1866 if (sdata->csa_block_tx) {
1867 ieee80211_wake_vif_queues(local, sdata,
1868 IEEE80211_QUEUE_STOP_REASON_CSA);
1869 sdata->csa_block_tx = false;
1870 }
34a3740d 1871 mutex_unlock(&local->mtx);
2475b1cc
MS		 1872
1873 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
aa458d17 1874}
f0706e82 1875
3cf335d5
KV		 1876void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1877 struct ieee80211_hdr *hdr)
1878{
1879 /*
1880 * We can postpone the mgd.timer whenever receiving unicast frames
1881 * from AP because we know that the connection is working both ways
1882 * at that time. But multicast frames (and hence also beacons) must
1883 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 1884 * data idle periods for sending the periodic probe request to the
1885 * AP we're connected to.
3cf335d5 1886 */
b291ba11
JB		 1887 if (is_multicast_ether_addr(hdr->addr1))
1888 return;
1889
be099e82 1890 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 1891}
f0706e82 1892
4e5ff376
FF		 1893static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1894{
1895 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
133d40f9 1896 struct ieee80211_local *local = sdata->local;
4e5ff376 1897
133d40f9 1898 mutex_lock(&local->mtx);
392b9ffb
SG		 1899 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
1900 goto out;
4e5ff376 1901
925e64c3 1902 __ieee80211_stop_poll(sdata);
133d40f9
SG		 1903
1904 mutex_lock(&local->iflist_mtx);
1905 ieee80211_recalc_ps(local, -1);
1906 mutex_unlock(&local->iflist_mtx);
4e5ff376
FF		 1907
1908 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
133d40f9 1909 goto out;
4e5ff376
FF		 1910
1911 /*
1912 * We've received a probe response, but are not sure whether
1913 * we have or will be receiving any beacons or data, so let's
1914 * schedule the timers again, just in case.
1915 */
1916 ieee80211_sta_reset_beacon_monitor(sdata);
1917
1918 mod_timer(&ifmgd->conn_mon_timer,
1919 round_jiffies_up(jiffies +
1920 IEEE80211_CONNECTION_IDLE_TIME));
133d40f9 1921out:
133d40f9 1922 mutex_unlock(&local->mtx);
4e5ff376
FF		 1923}
1924
1925void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
04ac3c0e 1926 struct ieee80211_hdr *hdr, bool ack)
4e5ff376 1927{
75706d0e 1928 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF		 1929 return;
1930
4e5ff376
FF		 1931 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1932 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e 1933 if (ack)
cab1c7fd 1934 ieee80211_sta_reset_conn_monitor(sdata);
04ac3c0e
FF		 1935 else
1936 sdata->u.mgd.nullfunc_failed = true;
4e5ff376 1937 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
cab1c7fd 1938 return;
4e5ff376 1939 }
cab1c7fd
WD		 1940
1941 if (ack)
1942 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF		 1943}
1944
a43abf29
ML		 1945static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1946{
1947 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1948 const u8 *ssid;
f01a067d 1949 u8 *dst = ifmgd->associated->bssid;
180205bd 1950 u8 unicast_limit = max(1, max_probe_tries - 3);
f01a067d
LR		 1951
1952 /*
1953 * Try sending broadcast probe requests for the last three
1954 * probe requests after the first ones failed since some
1955 * buggy APs only support broadcast probe requests.
1956 */
1957 if (ifmgd->probe_send_count >= unicast_limit)
1958 dst = NULL;
a43abf29 1959
4e5ff376
FF		 1960 /*
1961 * When the hardware reports an accurate Tx ACK status, it's
1962 * better to send a nullfunc frame instead of a probe request,
1963 * as it will kick us off the AP quickly if we aren't associated
1964 * anymore. The timeout will be reset if the frame is ACKed by
1965 * the AP.
1966 */
992e68bf
SD		 1967 ifmgd->probe_send_count++;
1968
04ac3c0e
FF		 1969 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1970 ifmgd->nullfunc_failed = false;
4e5ff376 1971 ieee80211_send_nullfunc(sdata->local, sdata, 0);
04ac3c0e 1972 } else {
88c868c4
SG		 1973 int ssid_len;
1974
9caf0364 1975 rcu_read_lock();
4e5ff376 1976 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
88c868c4
SG		 1977 if (WARN_ON_ONCE(ssid == NULL))
1978 ssid_len = 0;
1979 else
1980 ssid_len = ssid[1];
1981
1982 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
1672c0e3 1983 0, (u32) -1, true, 0,
55de908a 1984 ifmgd->associated->channel, false);
9caf0364 1985 rcu_read_unlock();
4e5ff376 1986 }
a43abf29 1987
180205bd 1988 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
8d61ffa5 1989 run_again(sdata, ifmgd->probe_timeout);
f69b9c79 1990 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
39ecc01d 1991 ieee80211_flush_queues(sdata->local, sdata);
a43abf29
ML		 1992}
1993
b291ba11
JB		 1994static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1995 bool beacon)
04de8381 1996{
04de8381 1997 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 1998 bool already = false;
34bfc411 1999
9607e6b6 2000 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 2001 return;
2002
8d61ffa5 2003 sdata_lock(sdata);
77fdaa12
JB		 2004
2005 if (!ifmgd->associated)
2006 goto out;
2007
133d40f9
SG		 2008 mutex_lock(&sdata->local->mtx);
2009
2010 if (sdata->local->tmp_channel || sdata->local->scanning) {
2011 mutex_unlock(&sdata->local->mtx);
2012 goto out;
2013 }
2014
a13fbe54 2015 if (beacon) {
bdcbd8e0 2016 mlme_dbg_ratelimited(sdata,
59c1ec2b
BG		 2017 "detected beacon loss from AP (missed %d beacons) - probing\n",
2018 beacon_loss_count);
bdcbd8e0 2019
a13fbe54
BG		 2020 ieee80211_cqm_rssi_notify(&sdata->vif,
2021 NL80211_CQM_RSSI_BEACON_LOSS_EVENT,
2022 GFP_KERNEL);
2023 }
04de8381 2024
b291ba11
JB		 2025 /*
2026 * The driver/our work has already reported this event or the
2027 * connection monitoring has kicked in and we have already sent
2028 * a probe request. Or maybe the AP died and the driver keeps
2029 * reporting until we disassociate...
2030 *
2031 * In either case we have to ignore the current call to this
2032 * function (except for setting the correct probe reason bit)
2033 * because otherwise we would reset the timer every time and
2034 * never check whether we received a probe response!
2035 */
392b9ffb 2036 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
b291ba11
JB		 2037 already = true;
2038
12b5f34d
EP		 2039 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2040
133d40f9
SG		 2041 mutex_unlock(&sdata->local->mtx);
2042
b291ba11
JB		 2043 if (already)
2044 goto out;
2045
4e751843
JB		 2046 mutex_lock(&sdata->local->iflist_mtx);
2047 ieee80211_recalc_ps(sdata->local, -1);
2048 mutex_unlock(&sdata->local->iflist_mtx);
2049
a43abf29
ML		 2050 ifmgd->probe_send_count = 0;
2051 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12 2052 out:
8d61ffa5 2053 sdata_unlock(sdata);
04de8381
KV		 2054}
2055
a619a4c0
JO		 2056struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2057 struct ieee80211_vif *vif)
2058{
2059 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2060 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d9b3b28b 2061 struct cfg80211_bss *cbss;
a619a4c0
JO		 2062 struct sk_buff *skb;
2063 const u8 *ssid;
88c868c4 2064 int ssid_len;
a619a4c0
JO		 2065
2066 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2067 return NULL;
2068
8d61ffa5 2069 sdata_assert_lock(sdata);
a619a4c0 2070
d9b3b28b
EP		 2071 if (ifmgd->associated)
2072 cbss = ifmgd->associated;
2073 else if (ifmgd->auth_data)
2074 cbss = ifmgd->auth_data->bss;
2075 else if (ifmgd->assoc_data)
2076 cbss = ifmgd->assoc_data->bss;
2077 else
a619a4c0
JO		 2078 return NULL;
2079
9caf0364 2080 rcu_read_lock();
d9b3b28b 2081 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
88c868c4
SG		 2082 if (WARN_ON_ONCE(ssid == NULL))
2083 ssid_len = 0;
2084 else
2085 ssid_len = ssid[1];
2086
d9b3b28b 2087 skb = ieee80211_build_probe_req(sdata, cbss->bssid,
55de908a 2088 (u32) -1, cbss->channel,
6b77863b 2089 ssid + 2, ssid_len,
85a237fe 2090 NULL, 0, true);
9caf0364 2091 rcu_read_unlock();
a619a4c0
JO		 2092
2093 return skb;
2094}
2095EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2096
eef9e54c 2097static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
1e4dcd01 2098{
59af6928 2099 struct ieee80211_local *local = sdata->local;
1e4dcd01 2100 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 2101 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
1e4dcd01 2102
8d61ffa5 2103 sdata_lock(sdata);
1e4dcd01 2104 if (!ifmgd->associated) {
8d61ffa5 2105 sdata_unlock(sdata);
1e4dcd01
JO		 2106 return;
2107 }
2108
37ad3888
JB		 2109 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2110 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
eef9e54c 2111 true, frame_buf);
59af6928 2112 mutex_lock(&local->mtx);
7578d575 2113 sdata->vif.csa_active = false;
a46992b4
LC		 2114 if (sdata->csa_block_tx) {
2115 ieee80211_wake_vif_queues(local, sdata,
2116 IEEE80211_QUEUE_STOP_REASON_CSA);
2117 sdata->csa_block_tx = false;
2118 }
59af6928 2119 mutex_unlock(&local->mtx);
7da7cc1d 2120
6ff57cf8
JB		 2121 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
2122 IEEE80211_DEAUTH_FRAME_LEN);
8d61ffa5 2123 sdata_unlock(sdata);
1e4dcd01
JO		 2124}
2125
cc74c0c7 2126static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 2127{
2128 struct ieee80211_sub_if_data *sdata =
2129 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 2130 u.mgd.beacon_connection_loss_work);
a85e1d55
PS		 2131 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2132 struct sta_info *sta;
2133
2134 if (ifmgd->associated) {
30fa9047 2135 rcu_read_lock();
a85e1d55
PS		 2136 sta = sta_info_get(sdata, ifmgd->bssid);
2137 if (sta)
2138 sta->beacon_loss_count++;
30fa9047 2139 rcu_read_unlock();
a85e1d55 2140 }
b291ba11 2141
682bd38b 2142 if (ifmgd->connection_loss) {
882a7c69
JB		 2143 sdata_info(sdata, "Connection to AP %pM lost\n",
2144 ifmgd->bssid);
eef9e54c 2145 __ieee80211_disconnect(sdata);
882a7c69 2146 } else {
1e4dcd01 2147 ieee80211_mgd_probe_ap(sdata, true);
882a7c69
JB		 2148 }
2149}
2150
2151static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2152{
2153 struct ieee80211_sub_if_data *sdata =
2154 container_of(work, struct ieee80211_sub_if_data,
2155 u.mgd.csa_connection_drop_work);
2156
eef9e54c 2157 __ieee80211_disconnect(sdata);
b291ba11
JB		 2158}
2159
04de8381
KV		 2160void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2161{
2162 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 2163 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 2164
b5878a2d
JB		 2165 trace_api_beacon_loss(sdata);
2166
682bd38b 2167 sdata->u.mgd.connection_loss = false;
1e4dcd01 2168 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 2169}
2170EXPORT_SYMBOL(ieee80211_beacon_loss);
2171
1e4dcd01
JO		 2172void ieee80211_connection_loss(struct ieee80211_vif *vif)
2173{
2174 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2175 struct ieee80211_hw *hw = &sdata->local->hw;
2176
b5878a2d
JB		 2177 trace_api_connection_loss(sdata);
2178
682bd38b 2179 sdata->u.mgd.connection_loss = true;
1e4dcd01
JO		 2180 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2181}
2182EXPORT_SYMBOL(ieee80211_connection_loss);
2183
2184
66e67e41
JB		 2185static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2186 bool assoc)
2187{
2188 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2189
8d61ffa5 2190 sdata_assert_lock(sdata);
66e67e41 2191
66e67e41
JB		 2192 if (!assoc) {
2193 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2194
2195 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2196 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
028e8da0 2197 sdata->u.mgd.flags = 0;
34a3740d 2198 mutex_lock(&sdata->local->mtx);
55de908a 2199 ieee80211_vif_release_channel(sdata);
34a3740d 2200 mutex_unlock(&sdata->local->mtx);
66e67e41
JB		 2201 }
2202
5b112d3d 2203 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
66e67e41
JB		 2204 kfree(auth_data);
2205 sdata->u.mgd.auth_data = NULL;
2206}
2207
2208static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2209 struct ieee80211_mgmt *mgmt, size_t len)
2210{
1672c0e3 2211 struct ieee80211_local *local = sdata->local;
66e67e41
JB		 2212 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2213 u8 *pos;
2214 struct ieee802_11_elems elems;
1672c0e3 2215 u32 tx_flags = 0;
66e67e41
JB		 2216
2217 pos = mgmt->u.auth.variable;
b2e506bf 2218 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
66e67e41
JB		 2219 if (!elems.challenge)
2220 return;
2221 auth_data->expected_transaction = 4;
a1845fc7 2222 drv_mgd_prepare_tx(sdata->local, sdata);
1672c0e3
JB		 2223 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2224 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2225 IEEE80211_TX_INTFL_MLME_CONN_TX;
700e8ea6 2226 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
66e67e41
JB		 2227 elems.challenge - 2, elems.challenge_len + 2,
2228 auth_data->bss->bssid, auth_data->bss->bssid,
2229 auth_data->key, auth_data->key_len,
1672c0e3 2230 auth_data->key_idx, tx_flags);
66e67e41
JB		 2231}
2232
8d61ffa5
JB		 2233static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2234 struct ieee80211_mgmt *mgmt, size_t len)
66e67e41
JB		 2235{
2236 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2237 u8 bssid[ETH_ALEN];
2238 u16 auth_alg, auth_transaction, status_code;
2239 struct sta_info *sta;
2240
8d61ffa5 2241 sdata_assert_lock(sdata);
66e67e41
JB		 2242
2243 if (len < 24 + 6)
8d61ffa5 2244 return;
66e67e41
JB		 2245
2246 if (!ifmgd->auth_data || ifmgd->auth_data->done)
8d61ffa5 2247 return;
66e67e41
JB		 2248
2249 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2250
b203ca39 2251 if (!ether_addr_equal(bssid, mgmt->bssid))
8d61ffa5 2252 return;
66e67e41
JB		 2253
2254 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2255 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2256 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2257
2258 if (auth_alg != ifmgd->auth_data->algorithm ||
0f4126e8
JM		 2259 auth_transaction != ifmgd->auth_data->expected_transaction) {
2260 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2261 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2262 auth_transaction,
2263 ifmgd->auth_data->expected_transaction);
8d61ffa5 2264 return;
0f4126e8 2265 }
66e67e41
JB		 2266
2267 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2268 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2269 mgmt->sa, status_code);
dac211ec 2270 ieee80211_destroy_auth_data(sdata, false);
6ff57cf8 2271 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
8d61ffa5 2272 return;
66e67e41
JB		 2273 }
2274
2275 switch (ifmgd->auth_data->algorithm) {
2276 case WLAN_AUTH_OPEN:
2277 case WLAN_AUTH_LEAP:
2278 case WLAN_AUTH_FT:
6b8ece3a 2279 case WLAN_AUTH_SAE:
66e67e41
JB		 2280 break;
2281 case WLAN_AUTH_SHARED_KEY:
2282 if (ifmgd->auth_data->expected_transaction != 4) {
2283 ieee80211_auth_challenge(sdata, mgmt, len);
2284 /* need another frame */
8d61ffa5 2285 return;
66e67e41
JB		 2286 }
2287 break;
2288 default:
2289 WARN_ONCE(1, "invalid auth alg %d",
2290 ifmgd->auth_data->algorithm);
8d61ffa5 2291 return;
66e67e41
JB		 2292 }
2293
bdcbd8e0 2294 sdata_info(sdata, "authenticated\n");
66e67e41
JB		 2295 ifmgd->auth_data->done = true;
2296 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
89afe614 2297 ifmgd->auth_data->timeout_started = true;
8d61ffa5 2298 run_again(sdata, ifmgd->auth_data->timeout);
66e67e41 2299
6b8ece3a
JM		 2300 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2301 ifmgd->auth_data->expected_transaction != 2) {
2302 /*
2303 * Report auth frame to user space for processing since another
2304 * round of Authentication frames is still needed.
2305 */
6ff57cf8 2306 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
8d61ffa5 2307 return;
6b8ece3a
JM		 2308 }
2309
66e67e41
JB		 2310 /* move station state to auth */
2311 mutex_lock(&sdata->local->sta_mtx);
2312 sta = sta_info_get(sdata, bssid);
2313 if (!sta) {
2314 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2315 goto out_err;
2316 }
2317 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
bdcbd8e0 2318 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
66e67e41
JB		 2319 goto out_err;
2320 }
2321 mutex_unlock(&sdata->local->sta_mtx);
2322
6ff57cf8 2323 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
8d61ffa5 2324 return;
66e67e41
JB		 2325 out_err:
2326 mutex_unlock(&sdata->local->sta_mtx);
2327 /* ignore frame -- wait for timeout */
66e67e41
JB		 2328}
2329
dfa1ad29
CO		 2330#define case_WLAN(type) \
2331 case WLAN_REASON_##type: return #type
2332
2333static const char *ieee80211_get_reason_code_string(u16 reason_code)
2334{
2335 switch (reason_code) {
2336 case_WLAN(UNSPECIFIED);
2337 case_WLAN(PREV_AUTH_NOT_VALID);
2338 case_WLAN(DEAUTH_LEAVING);
2339 case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2340 case_WLAN(DISASSOC_AP_BUSY);
2341 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2342 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2343 case_WLAN(DISASSOC_STA_HAS_LEFT);
2344 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2345 case_WLAN(DISASSOC_BAD_POWER);
2346 case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2347 case_WLAN(INVALID_IE);
2348 case_WLAN(MIC_FAILURE);
2349 case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2350 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2351 case_WLAN(IE_DIFFERENT);
2352 case_WLAN(INVALID_GROUP_CIPHER);
2353 case_WLAN(INVALID_PAIRWISE_CIPHER);
2354 case_WLAN(INVALID_AKMP);
2355 case_WLAN(UNSUPP_RSN_VERSION);
2356 case_WLAN(INVALID_RSN_IE_CAP);
2357 case_WLAN(IEEE8021X_FAILED);
2358 case_WLAN(CIPHER_SUITE_REJECTED);
2359 case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2360 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2361 case_WLAN(DISASSOC_LOW_ACK);
2362 case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2363 case_WLAN(QSTA_LEAVE_QBSS);
2364 case_WLAN(QSTA_NOT_USE);
2365 case_WLAN(QSTA_REQUIRE_SETUP);
2366 case_WLAN(QSTA_TIMEOUT);
2367 case_WLAN(QSTA_CIPHER_NOT_SUPP);
2368 case_WLAN(MESH_PEER_CANCELED);
2369 case_WLAN(MESH_MAX_PEERS);
2370 case_WLAN(MESH_CONFIG);
2371 case_WLAN(MESH_CLOSE);
2372 case_WLAN(MESH_MAX_RETRIES);
2373 case_WLAN(MESH_CONFIRM_TIMEOUT);
2374 case_WLAN(MESH_INVALID_GTK);
2375 case_WLAN(MESH_INCONSISTENT_PARAM);
2376 case_WLAN(MESH_INVALID_SECURITY);
2377 case_WLAN(MESH_PATH_ERROR);
2378 case_WLAN(MESH_PATH_NOFORWARD);
2379 case_WLAN(MESH_PATH_DEST_UNREACHABLE);
2380 case_WLAN(MAC_EXISTS_IN_MBSS);
2381 case_WLAN(MESH_CHAN_REGULATORY);
2382 case_WLAN(MESH_CHAN);
2383 default: return "<unknown>";
2384 }
2385}
66e67e41 2386
8d61ffa5
JB		 2387static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2388 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2389{
46900298 2390 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 2391 const u8 *bssid = NULL;
f0706e82
JB		 2392 u16 reason_code;
2393
8d61ffa5 2394 sdata_assert_lock(sdata);
66e67e41 2395
f4ea83dd 2396 if (len < 24 + 2)
8d61ffa5 2397 return;
f0706e82 2398
66e67e41 2399 if (!ifmgd->associated ||
b203ca39 2400 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
8d61ffa5 2401 return;
77fdaa12 2402
0c1ad2ca 2403 bssid = ifmgd->associated->bssid;
f0706e82
JB		 2404
2405 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2406
dfa1ad29
CO		 2407 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
2408 bssid, reason_code, ieee80211_get_reason_code_string(reason_code));
77fdaa12 2409
37ad3888
JB		 2410 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2411
6ff57cf8 2412 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
f0706e82
JB		 2413}
2414
2415
8d61ffa5
JB		 2416static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2417 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2418{
46900298 2419 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 2420 u16 reason_code;
2421
8d61ffa5 2422 sdata_assert_lock(sdata);
77fdaa12 2423
66e67e41 2424 if (len < 24 + 2)
8d61ffa5 2425 return;
77fdaa12 2426
66e67e41 2427 if (!ifmgd->associated ||
b203ca39 2428 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
8d61ffa5 2429 return;
f0706e82
JB		 2430
2431 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2432
bdcbd8e0
JB		 2433 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2434 mgmt->sa, reason_code);
f0706e82 2435
37ad3888
JB		 2436 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2437
6ff57cf8 2438 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
f0706e82
JB		 2439}
2440
c74d084f
CL		 2441static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2442 u8 *supp_rates, unsigned int supp_rates_len,
2443 u32 *rates, u32 *basic_rates,
2444 bool *have_higher_than_11mbit,
2103dec1
SW		 2445 int *min_rate, int *min_rate_index,
2446 int shift, u32 rate_flags)
c74d084f
CL		 2447{
2448 int i, j;
2449
2450 for (i = 0; i < supp_rates_len; i++) {
2103dec1 2451 int rate = supp_rates[i] & 0x7f;
c74d084f
CL		 2452 bool is_basic = !!(supp_rates[i] & 0x80);
2453
2103dec1 2454 if ((rate * 5 * (1 << shift)) > 110)
c74d084f
CL		 2455 *have_higher_than_11mbit = true;
2456
2457 /*
2458 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2459 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2460 *
2461 * Note: Even through the membership selector and the basic
2462 * rate flag share the same bit, they are not exactly
2463 * the same.
2464 */
2465 if (!!(supp_rates[i] & 0x80) &&
2466 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2467 continue;
2468
2469 for (j = 0; j < sband->n_bitrates; j++) {
2103dec1
SW		 2470 struct ieee80211_rate *br;
2471 int brate;
2472
2473 br = &sband->bitrates[j];
2474 if ((rate_flags & br->flags) != rate_flags)
2475 continue;
2476
2477 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2478 if (brate == rate) {
c74d084f
CL		 2479 *rates |= BIT(j);
2480 if (is_basic)
2481 *basic_rates |= BIT(j);
2103dec1
SW		 2482 if ((rate * 5) < *min_rate) {
2483 *min_rate = rate * 5;
c74d084f
CL		 2484 *min_rate_index = j;
2485 }
2486 break;
2487 }
2488 }
2489 }
2490}
f0706e82 2491
66e67e41
JB		 2492static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2493 bool assoc)
2494{
2495 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2496
8d61ffa5 2497 sdata_assert_lock(sdata);
66e67e41 2498
66e67e41
JB		 2499 if (!assoc) {
2500 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2501
2502 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2503 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
028e8da0 2504 sdata->u.mgd.flags = 0;
34a3740d 2505 mutex_lock(&sdata->local->mtx);
55de908a 2506 ieee80211_vif_release_channel(sdata);
34a3740d 2507 mutex_unlock(&sdata->local->mtx);
66e67e41
JB		 2508 }
2509
2510 kfree(assoc_data);
2511 sdata->u.mgd.assoc_data = NULL;
2512}
2513
2514static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2515 struct cfg80211_bss *cbss,
af6b6374 2516 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2517{
46900298 2518 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 2519 struct ieee80211_local *local = sdata->local;
8318d78a 2520 struct ieee80211_supported_band *sband;
f0706e82 2521 struct sta_info *sta;
af6b6374 2522 u8 *pos;
af6b6374 2523 u16 capab_info, aid;
f0706e82 2524 struct ieee802_11_elems elems;
bda3933a 2525 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
35d865af
JB		 2526 const struct cfg80211_bss_ies *bss_ies = NULL;
2527 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
ae5eb026 2528 u32 changed = 0;
c74d084f 2529 int err;
35d865af 2530 bool ret;
f0706e82 2531
af6b6374 2532 /* AssocResp and ReassocResp have identical structure */
f0706e82 2533
f0706e82 2534 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 2535 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 2536
1dd84aa2 2537 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
bdcbd8e0
JB		 2538 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2539 aid);
1dd84aa2
JB		 2540 aid &= ~(BIT(15) | BIT(14));
2541
05cb9108
JB		 2542 ifmgd->broken_ap = false;
2543
2544 if (aid == 0 || aid > IEEE80211_MAX_AID) {
bdcbd8e0
JB		 2545 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2546 aid);
05cb9108
JB		 2547 aid = 0;
2548 ifmgd->broken_ap = true;
2549 }
2550
af6b6374 2551 pos = mgmt->u.assoc_resp.variable;
b2e506bf 2552 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
af6b6374 2553
f0706e82 2554 if (!elems.supp_rates) {
bdcbd8e0 2555 sdata_info(sdata, "no SuppRates element in AssocResp\n");
af6b6374 2556 return false;
f0706e82
JB		 2557 }
2558
46900298 2559 ifmgd->aid = aid;
f0706e82 2560
35d865af
JB		 2561 /*
2562 * Some APs are erroneously not including some information in their
2563 * (re)association response frames. Try to recover by using the data
2564 * from the beacon or probe response. This seems to afflict mobile
2565 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2566 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2567 */
2568 if ((assoc_data->wmm && !elems.wmm_param) ||
2569 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2570 (!elems.ht_cap_elem || !elems.ht_operation)) ||
2571 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2572 (!elems.vht_cap_elem || !elems.vht_operation))) {
2573 const struct cfg80211_bss_ies *ies;
2574 struct ieee802_11_elems bss_elems;
2575
2576 rcu_read_lock();
2577 ies = rcu_dereference(cbss->ies);
2578 if (ies)
2579 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2580 GFP_ATOMIC);
2581 rcu_read_unlock();
2582 if (!bss_ies)
2583 return false;
2584
2585 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2586 false, &bss_elems);
2587 if (assoc_data->wmm &&
2588 !elems.wmm_param && bss_elems.wmm_param) {
2589 elems.wmm_param = bss_elems.wmm_param;
2590 sdata_info(sdata,
2591 "AP bug: WMM param missing from AssocResp\n");
2592 }
2593
2594 /*
2595 * Also check if we requested HT/VHT, otherwise the AP doesn't
2596 * have to include the IEs in the (re)association response.
2597 */
2598 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2599 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2600 elems.ht_cap_elem = bss_elems.ht_cap_elem;
2601 sdata_info(sdata,
2602 "AP bug: HT capability missing from AssocResp\n");
2603 }
2604 if (!elems.ht_operation && bss_elems.ht_operation &&
2605 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2606 elems.ht_operation = bss_elems.ht_operation;
2607 sdata_info(sdata,
2608 "AP bug: HT operation missing from AssocResp\n");
2609 }
2610 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2611 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2612 elems.vht_cap_elem = bss_elems.vht_cap_elem;
2613 sdata_info(sdata,
2614 "AP bug: VHT capa missing from AssocResp\n");
2615 }
2616 if (!elems.vht_operation && bss_elems.vht_operation &&
2617 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2618 elems.vht_operation = bss_elems.vht_operation;
2619 sdata_info(sdata,
2620 "AP bug: VHT operation missing from AssocResp\n");
2621 }
2622 }
2623
30eb1dc2
JB		 2624 /*
2625 * We previously checked these in the beacon/probe response, so
2626 * they should be present here. This is just a safety net.
2627 */
2628 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2629 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2630 sdata_info(sdata,
35d865af
JB		 2631 "HT AP is missing WMM params or HT capability/operation\n");
2632 ret = false;
2633 goto out;
30eb1dc2
JB		 2634 }
2635
2636 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2637 (!elems.vht_cap_elem || !elems.vht_operation)) {
2638 sdata_info(sdata,
35d865af
JB		 2639 "VHT AP is missing VHT capability/operation\n");
2640 ret = false;
2641 goto out;
30eb1dc2
JB		 2642 }
2643
2a33bee2
GE		 2644 mutex_lock(&sdata->local->sta_mtx);
2645 /*
2646 * station info was already allocated and inserted before
2647 * the association and should be available to us
2648 */
7852e361 2649 sta = sta_info_get(sdata, cbss->bssid);
2a33bee2
GE		 2650 if (WARN_ON(!sta)) {
2651 mutex_unlock(&sdata->local->sta_mtx);
35d865af
JB		 2652 ret = false;
2653 goto out;
77fdaa12 2654 }
05e5e883 2655
55de908a 2656 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
f709fc69 2657
30eb1dc2 2658 /* Set up internal HT/VHT capabilities */
a8243b72 2659 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
ef96a842 2660 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
e1a0c6b3 2661 elems.ht_cap_elem, sta);
64f68e5d 2662
818255ea
MP		 2663 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2664 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
4a34215e 2665 elems.vht_cap_elem, sta);
818255ea 2666
30eb1dc2
JB		 2667 /*
2668 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
2669 * in their association response, so ignore that data for our own
2670 * configuration. If it changed since the last beacon, we'll get the
2671 * next beacon and update then.
2672 */
1128958d 2673
bee7f586
JB		 2674 /*
2675 * If an operating mode notification IE is present, override the
2676 * NSS calculation (that would be done in rate_control_rate_init())
2677 * and use the # of streams from that element.
2678 */
2679 if (elems.opmode_notif &&
2680 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
2681 u8 nss;
2682
2683 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
2684 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
2685 nss += 1;
2686 sta->sta.rx_nss = nss;
2687 }
2688
4b7679a5 2689 rate_control_rate_init(sta);
f0706e82 2690
46900298 2691 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
c2c98fde 2692 set_sta_flag(sta, WLAN_STA_MFP);
5394af4d 2693
a74a8c84 2694 sta->sta.wme = elems.wmm_param;
ddf4ac53 2695
3e4d40fa 2696 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
c8987876
JB		 2697 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2698 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2699 if (err) {
bdcbd8e0
JB		 2700 sdata_info(sdata,
2701 "failed to move station %pM to desired state\n",
2702 sta->sta.addr);
c8987876
JB		 2703 WARN_ON(__sta_info_destroy(sta));
2704 mutex_unlock(&sdata->local->sta_mtx);
35d865af
JB		 2705 ret = false;
2706 goto out;
c8987876
JB		 2707 }
2708
7852e361 2709 mutex_unlock(&sdata->local->sta_mtx);
ddf4ac53 2710
f2176d72
JO		 2711 /*
2712 * Always handle WMM once after association regardless
2713 * of the first value the AP uses. Setting -1 here has
2714 * that effect because the AP values is an unsigned
2715 * 4-bit value.
2716 */
2717 ifmgd->wmm_last_param_set = -1;
2718
095d81ce 2719 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && elems.wmm_param)
4ced3f74 2720 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 2721 elems.wmm_param_len);
aa837e1d 2722 else
3abead59
JB		 2723 ieee80211_set_wmm_default(sdata, false);
2724 changed |= BSS_CHANGED_QOS;
f0706e82 2725
60f8b39c
JB		 2726 /* set AID and assoc capability,
2727 * ieee80211_set_associated() will tell the driver */
2728 bss_conf->aid = aid;
2729 bss_conf->assoc_capability = capab_info;
0c1ad2ca 2730 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 2731
d524215f
FF		 2732 /*
2733 * If we're using 4-addr mode, let the AP know that we're
2734 * doing so, so that it can create the STA VLAN on its side
2735 */
2736 if (ifmgd->use_4addr)
2737 ieee80211_send_4addr_nullfunc(local, sdata);
2738
15b7b062 2739 /*
b291ba11
JB		 2740 * Start timer to probe the connection to the AP now.
2741 * Also start the timer that will detect beacon loss.
15b7b062 2742 */
b291ba11 2743 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 2744 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 2745
35d865af
JB		 2746 ret = true;
2747 out:
2748 kfree(bss_ies);
2749 return ret;
f0706e82
JB		 2750}
2751
8d61ffa5
JB		 2752static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2753 struct ieee80211_mgmt *mgmt,
2754 size_t len)
66e67e41
JB		 2755{
2756 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2757 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2758 u16 capab_info, status_code, aid;
2759 struct ieee802_11_elems elems;
2760 u8 *pos;
2761 bool reassoc;
8d61ffa5 2762 struct cfg80211_bss *bss;
66e67e41 2763
8d61ffa5 2764 sdata_assert_lock(sdata);
66e67e41
JB		 2765
2766 if (!assoc_data)
8d61ffa5 2767 return;
b203ca39 2768 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
8d61ffa5 2769 return;
66e67e41
JB		 2770
2771 /*
2772 * AssocResp and ReassocResp have identical structure, so process both
2773 * of them in this function.
2774 */
2775
2776 if (len < 24 + 6)
8d61ffa5 2777 return;
66e67e41
JB		 2778
2779 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2780 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2781 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2782 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2783
bdcbd8e0
JB		 2784 sdata_info(sdata,
2785 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2786 reassoc ? "Rea" : "A", mgmt->sa,
2787 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
66e67e41
JB		 2788
2789 pos = mgmt->u.assoc_resp.variable;
b2e506bf 2790 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
66e67e41
JB		 2791
2792 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
79ba1d89
JB		 2793 elems.timeout_int &&
2794 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
66e67e41 2795 u32 tu, ms;
79ba1d89 2796 tu = le32_to_cpu(elems.timeout_int->value);
66e67e41 2797 ms = tu * 1024 / 1000;
bdcbd8e0
JB		 2798 sdata_info(sdata,
2799 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2800 mgmt->sa, tu, ms);
66e67e41 2801 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
89afe614 2802 assoc_data->timeout_started = true;
66e67e41 2803 if (ms > IEEE80211_ASSOC_TIMEOUT)
8d61ffa5
JB		 2804 run_again(sdata, assoc_data->timeout);
2805 return;
66e67e41
JB		 2806 }
2807
8d61ffa5 2808 bss = assoc_data->bss;
66e67e41
JB		 2809
2810 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2811 sdata_info(sdata, "%pM denied association (code=%d)\n",
2812 mgmt->sa, status_code);
66e67e41
JB		 2813 ieee80211_destroy_assoc_data(sdata, false);
2814 } else {
8d61ffa5 2815 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
66e67e41 2816 /* oops -- internal error -- send timeout for now */
10a9109f 2817 ieee80211_destroy_assoc_data(sdata, false);
959867fa 2818 cfg80211_assoc_timeout(sdata->dev, bss);
8d61ffa5 2819 return;
66e67e41 2820 }
635d999f 2821 sdata_info(sdata, "associated\n");
79ebfb85
JB		 2822
2823 /*
2824 * destroy assoc_data afterwards, as otherwise an idle
2825 * recalc after assoc_data is NULL but before associated
2826 * is set can cause the interface to go idle
2827 */
2828 ieee80211_destroy_assoc_data(sdata, true);
66e67e41
JB		 2829 }
2830
6ff57cf8 2831 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len);
66e67e41 2832}
8e3c1b77 2833
98c8fccf 2834static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
8e3c1b77 2835 struct ieee80211_mgmt *mgmt, size_t len,
98c8fccf 2836 struct ieee80211_rx_status *rx_status,
d45c4172 2837 struct ieee802_11_elems *elems)
98c8fccf
JB		 2838{
2839 struct ieee80211_local *local = sdata->local;
c2b13452 2840 struct ieee80211_bss *bss;
98c8fccf 2841 struct ieee80211_channel *channel;
56007a02 2842
8d61ffa5 2843 sdata_assert_lock(sdata);
b4f286a1 2844
3afc2167
EG		 2845 channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
2846 if (!channel)
98c8fccf
JB		 2847 return;
2848
98c8fccf 2849 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
d45c4172 2850 channel);
817cee76 2851 if (bss) {
817cee76 2852 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
d2722f8b 2853 ieee80211_rx_bss_put(local, bss);
817cee76 2854 }
f0706e82
JB		 2855}
2856
2857
f698d856 2858static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 2859 struct sk_buff *skb)
f0706e82 2860{
af6b6374 2861 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 2862 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 2863 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2864 size_t baselen, len = skb->len;
ae6a44e3
EK		 2865 struct ieee802_11_elems elems;
2866
15b7b062
KV		 2867 ifmgd = &sdata->u.mgd;
2868
8d61ffa5 2869 sdata_assert_lock(sdata);
77fdaa12 2870
b203ca39 2871 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
8e7cdbb6
TW		 2872 return; /* ignore ProbeResp to foreign address */
2873
ae6a44e3
EK		 2874 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2875 if (baselen > len)
2876 return;
2877
2878 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
b2e506bf 2879 false, &elems);
ae6a44e3 2880
d45c4172 2881 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
9859b81e 2882
77fdaa12 2883 if (ifmgd->associated &&
b203ca39 2884 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
4e5ff376 2885 ieee80211_reset_ap_probe(sdata);
66e67e41
JB		 2886
2887 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
b203ca39 2888 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
66e67e41 2889 /* got probe response, continue with auth */
bdcbd8e0 2890 sdata_info(sdata, "direct probe responded\n");
66e67e41
JB		 2891 ifmgd->auth_data->tries = 0;
2892 ifmgd->auth_data->timeout = jiffies;
89afe614 2893 ifmgd->auth_data->timeout_started = true;
8d61ffa5 2894 run_again(sdata, ifmgd->auth_data->timeout);
66e67e41 2895 }
f0706e82
JB		 2896}
2897
d91f36db
JB		 2898/*
2899 * This is the canonical list of information elements we care about,
2900 * the filter code also gives us all changes to the Microsoft OUI
2901 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2902 *
2903 * We implement beacon filtering in software since that means we can
2904 * avoid processing the frame here and in cfg80211, and userspace
2905 * will not be able to tell whether the hardware supports it or not.
2906 *
2907 * XXX: This list needs to be dynamic -- userspace needs to be able to
2908 * add items it requires. It also needs to be able to tell us to
2909 * look out for other vendor IEs.
2910 */
2911static const u64 care_about_ies =
1d4df3a5
JB		 2912 (1ULL << WLAN_EID_COUNTRY) |
2913 (1ULL << WLAN_EID_ERP_INFO) |
2914 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2915 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2916 (1ULL << WLAN_EID_HT_CAPABILITY) |
074d46d1 2917 (1ULL << WLAN_EID_HT_OPERATION);
d91f36db 2918
8d61ffa5
JB		 2919static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
2920 struct ieee80211_mgmt *mgmt, size_t len,
2921 struct ieee80211_rx_status *rx_status)
f0706e82 2922{
d91f36db 2923 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 2924 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 2925 size_t baselen;
2926 struct ieee802_11_elems elems;
f698d856 2927 struct ieee80211_local *local = sdata->local;
55de908a
JB		 2928 struct ieee80211_chanctx_conf *chanctx_conf;
2929 struct ieee80211_channel *chan;
bee7f586 2930 struct sta_info *sta;
471b3efd 2931 u32 changed = 0;
f87ad637 2932 bool erp_valid;
7a5158ef 2933 u8 erp_value = 0;
d91f36db 2934 u32 ncrc;
77fdaa12 2935 u8 *bssid;
8d61ffa5 2936 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
77fdaa12 2937
8d61ffa5 2938 sdata_assert_lock(sdata);
f0706e82 2939
ae6a44e3
EK		 2940 /* Process beacon from the current BSS */
2941 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2942 if (baselen > len)
8d61ffa5 2943 return;
ae6a44e3 2944
55de908a
JB		 2945 rcu_read_lock();
2946 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2947 if (!chanctx_conf) {
2948 rcu_read_unlock();
8d61ffa5 2949 return;
55de908a
JB		 2950 }
2951
4bf88530 2952 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
55de908a 2953 rcu_read_unlock();
8d61ffa5 2954 return;
55de908a 2955 }
4bf88530 2956 chan = chanctx_conf->def.chan;
55de908a 2957 rcu_read_unlock();
f0706e82 2958
c65dd147 2959 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
b203ca39 2960 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
66e67e41 2961 ieee802_11_parse_elems(mgmt->u.beacon.variable,
b2e506bf 2962 len - baselen, false, &elems);
77fdaa12 2963
d45c4172 2964 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
482a9c74
AB		 2965 if (elems.tim && !elems.parse_error) {
2966 const struct ieee80211_tim_ie *tim_ie = elems.tim;
2967 ifmgd->dtim_period = tim_ie->dtim_period;
2968 }
989c6505 2969 ifmgd->have_beacon = true;
c65dd147 2970 ifmgd->assoc_data->need_beacon = false;
ef429dad
JB		 2971 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
2972 sdata->vif.bss_conf.sync_tsf =
2973 le64_to_cpu(mgmt->u.beacon.timestamp);
2974 sdata->vif.bss_conf.sync_device_ts =
2975 rx_status->device_timestamp;
2976 if (elems.tim)
2977 sdata->vif.bss_conf.sync_dtim_count =
2978 elems.tim->dtim_count;
2979 else
2980 sdata->vif.bss_conf.sync_dtim_count = 0;
2981 }
66e67e41
JB		 2982 /* continue assoc process */
2983 ifmgd->assoc_data->timeout = jiffies;
89afe614 2984 ifmgd->assoc_data->timeout_started = true;
8d61ffa5
JB		 2985 run_again(sdata, ifmgd->assoc_data->timeout);
2986 return;
66e67e41 2987 }
77fdaa12 2988
66e67e41 2989 if (!ifmgd->associated ||
b203ca39 2990 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
8d61ffa5 2991 return;
66e67e41 2992 bssid = ifmgd->associated->bssid;
f0706e82 2993
17e4ec14
JM		 2994 /* Track average RSSI from the Beacon frames of the current AP */
2995 ifmgd->last_beacon_signal = rx_status->signal;
2996 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
2997 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3ba06c6f 2998 ifmgd->ave_beacon_signal = rx_status->signal * 16;
17e4ec14 2999 ifmgd->last_cqm_event_signal = 0;
391a200a 3000 ifmgd->count_beacon_signal = 1;
615f7b9b 3001 ifmgd->last_ave_beacon_signal = 0;
17e4ec14
JM		 3002 } else {
3003 ifmgd->ave_beacon_signal =
3004 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
3005 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
3006 ifmgd->ave_beacon_signal) / 16;
391a200a 3007 ifmgd->count_beacon_signal++;
17e4ec14 3008 }
615f7b9b
MV		 3009
3010 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3011 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3012 int sig = ifmgd->ave_beacon_signal;
3013 int last_sig = ifmgd->last_ave_beacon_signal;
3014
3015 /*
3016 * if signal crosses either of the boundaries, invoke callback
3017 * with appropriate parameters
3018 */
3019 if (sig > ifmgd->rssi_max_thold &&
3020 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3021 ifmgd->last_ave_beacon_signal = sig;
887da917 3022 drv_rssi_callback(local, sdata, RSSI_EVENT_HIGH);
615f7b9b
MV		 3023 } else if (sig < ifmgd->rssi_min_thold &&
3024 (last_sig >= ifmgd->rssi_max_thold ||
3025 last_sig == 0)) {
3026 ifmgd->last_ave_beacon_signal = sig;
887da917 3027 drv_rssi_callback(local, sdata, RSSI_EVENT_LOW);
615f7b9b
MV		 3028 }
3029 }
3030
17e4ec14 3031 if (bss_conf->cqm_rssi_thold &&
391a200a 3032 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
ea086359 3033 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
17e4ec14
JM		 3034 int sig = ifmgd->ave_beacon_signal / 16;
3035 int last_event = ifmgd->last_cqm_event_signal;
3036 int thold = bss_conf->cqm_rssi_thold;
3037 int hyst = bss_conf->cqm_rssi_hyst;
3038 if (sig < thold &&
3039 (last_event == 0 || sig < last_event - hyst)) {
3040 ifmgd->last_cqm_event_signal = sig;
3041 ieee80211_cqm_rssi_notify(
3042 &sdata->vif,
3043 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3044 GFP_KERNEL);
3045 } else if (sig > thold &&
3046 (last_event == 0 || sig > last_event + hyst)) {
3047 ifmgd->last_cqm_event_signal = sig;
3048 ieee80211_cqm_rssi_notify(
3049 &sdata->vif,
3050 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3051 GFP_KERNEL);
3052 }
3053 }
3054
392b9ffb 3055 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
bdcbd8e0 3056 mlme_dbg_ratelimited(sdata,
112c31f0 3057 "cancelling AP probe due to a received beacon\n");
392b9ffb 3058 ieee80211_reset_ap_probe(sdata);
92778180
JM		 3059 }
3060
b291ba11
JB		 3061 /*
3062 * Push the beacon loss detection into the future since
3063 * we are processing a beacon from the AP just now.
3064 */
d3a910a8 3065 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 3066
d91f36db
JB		 3067 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3068 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
b2e506bf 3069 len - baselen, false, &elems,
d91f36db
JB		 3070 care_about_ies, ncrc);
3071
25c9c875 3072 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
f87ad637
RR		 3073 bool directed_tim = ieee80211_check_tim(elems.tim,
3074 elems.tim_len,
3075 ifmgd->aid);
1fb3606b 3076 if (directed_tim) {
572e0012 3077 if (local->hw.conf.dynamic_ps_timeout > 0) {
70b12f26
RW		 3078 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3079 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3080 ieee80211_hw_config(local,
3081 IEEE80211_CONF_CHANGE_PS);
3082 }
572e0012 3083 ieee80211_send_nullfunc(local, sdata, 0);
6f0756a3 3084 } else if (!local->pspolling && sdata->u.mgd.powersave) {
572e0012
KV		 3085 local->pspolling = true;
3086
3087 /*
3088 * Here is assumed that the driver will be
3089 * able to send ps-poll frame and receive a
3090 * response even though power save mode is
3091 * enabled, but some drivers might require
3092 * to disable power save here. This needs
3093 * to be investigated.
3094 */
3095 ieee80211_send_pspoll(local, sdata);
3096 }
a97b77b9
VN		 3097 }
3098 }
7a5158ef 3099
488dd7b5 3100 if (sdata->vif.p2p) {
67baf663 3101 struct ieee80211_p2p_noa_attr noa = {};
488dd7b5
JB		 3102 int ret;
3103
3104 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3105 len - baselen,
3106 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
934457ee 3107 (u8 *) &noa, sizeof(noa));
67baf663
JD		 3108 if (ret >= 2) {
3109 if (sdata->u.mgd.p2p_noa_index != noa.index) {
3110 /* valid noa_attr and index changed */
3111 sdata->u.mgd.p2p_noa_index = noa.index;
3112 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3113 changed |= BSS_CHANGED_P2P_PS;
3114 /*
3115 * make sure we update all information, the CRC
3116 * mechanism doesn't look at P2P attributes.
3117 */
3118 ifmgd->beacon_crc_valid = false;
3119 }
3120 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3121 /* noa_attr not found and we had valid noa_attr before */
3122 sdata->u.mgd.p2p_noa_index = -1;
3123 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
488dd7b5 3124 changed |= BSS_CHANGED_P2P_PS;
488dd7b5
JB		 3125 ifmgd->beacon_crc_valid = false;
3126 }
3127 }
3128
d8ec4433 3129 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
8d61ffa5 3130 return;
30196673 3131 ifmgd->beacon_crc = ncrc;
d8ec4433 3132 ifmgd->beacon_crc_valid = true;
30196673 3133
d45c4172 3134 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
7d25745d 3135
d70b7616
JB		 3136 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
3137 &elems, true);
3138
095d81ce
JB		 3139 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3140 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
7d25745d
JB		 3141 elems.wmm_param_len))
3142 changed |= BSS_CHANGED_QOS;
3143
c65dd147
EG		 3144 /*
3145 * If we haven't had a beacon before, tell the driver about the
ef429dad 3146 * DTIM period (and beacon timing if desired) now.
c65dd147 3147 */
989c6505 3148 if (!ifmgd->have_beacon) {
c65dd147
EG		 3149 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3150 if (elems.tim)
3151 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3152 else
3153 bss_conf->dtim_period = 1;
ef429dad
JB		 3154
3155 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3156 sdata->vif.bss_conf.sync_tsf =
3157 le64_to_cpu(mgmt->u.beacon.timestamp);
3158 sdata->vif.bss_conf.sync_device_ts =
3159 rx_status->device_timestamp;
3160 if (elems.tim)
3161 sdata->vif.bss_conf.sync_dtim_count =
3162 elems.tim->dtim_count;
3163 else
3164 sdata->vif.bss_conf.sync_dtim_count = 0;
3165 }
3166
989c6505
AB		 3167 changed |= BSS_CHANGED_BEACON_INFO;
3168 ifmgd->have_beacon = true;
482a9c74
AB		 3169
3170 mutex_lock(&local->iflist_mtx);
3171 ieee80211_recalc_ps(local, -1);
3172 mutex_unlock(&local->iflist_mtx);
3173
ce857888 3174 ieee80211_recalc_ps_vif(sdata);
c65dd147
EG		 3175 }
3176
1946bed9 3177 if (elems.erp_info) {
7a5158ef
JB		 3178 erp_valid = true;
3179 erp_value = elems.erp_info[0];
3180 } else {
3181 erp_valid = false;
50c4afb9 3182 }
7a5158ef
JB		 3183 changed |= ieee80211_handle_bss_capability(sdata,
3184 le16_to_cpu(mgmt->u.beacon.capab_info),
3185 erp_valid, erp_value);
f0706e82 3186
1128958d 3187 mutex_lock(&local->sta_mtx);
bee7f586
JB		 3188 sta = sta_info_get(sdata, bssid);
3189
53b954ee
EP		 3190 if (ieee80211_config_bw(sdata, sta,
3191 elems.ht_cap_elem, elems.ht_operation,
30eb1dc2
JB		 3192 elems.vht_operation, bssid, &changed)) {
3193 mutex_unlock(&local->sta_mtx);
3194 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3195 WLAN_REASON_DEAUTH_LEAVING,
3196 true, deauth_buf);
6ff57cf8
JB		 3197 cfg80211_tx_mlme_mgmt(sdata->dev, deauth_buf,
3198 sizeof(deauth_buf));
8d61ffa5 3199 return;
30eb1dc2 3200 }
bee7f586
JB		 3201
3202 if (sta && elems.opmode_notif)
3203 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3204 rx_status->band, true);
1128958d 3205 mutex_unlock(&local->sta_mtx);
d3c990fb 3206
04b7b2ff
JB		 3207 if (elems.country_elem && elems.pwr_constr_elem &&
3208 mgmt->u.probe_resp.capab_info &
3209 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT))
1ea6f9c0
JB		 3210 changed |= ieee80211_handle_pwr_constr(sdata, chan,
3211 elems.country_elem,
3212 elems.country_elem_len,
3213 elems.pwr_constr_elem);
3f2355cb 3214
471b3efd 3215 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 3216}
3217
1fa57d01
JB		 3218void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3219 struct sk_buff *skb)
f0706e82
JB		 3220{
3221 struct ieee80211_rx_status *rx_status;
f0706e82
JB		 3222 struct ieee80211_mgmt *mgmt;
3223 u16 fc;
1b3a2e49
JB		 3224 struct ieee802_11_elems elems;
3225 int ies_len;
f0706e82 3226
f0706e82
JB		 3227 rx_status = (struct ieee80211_rx_status *) skb->cb;
3228 mgmt = (struct ieee80211_mgmt *) skb->data;
3229 fc = le16_to_cpu(mgmt->frame_control);
3230
8d61ffa5 3231 sdata_lock(sdata);
77fdaa12 3232
66e67e41
JB		 3233 switch (fc & IEEE80211_FCTL_STYPE) {
3234 case IEEE80211_STYPE_BEACON:
8d61ffa5 3235 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
66e67e41
JB		 3236 break;
3237 case IEEE80211_STYPE_PROBE_RESP:
3238 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3239 break;
3240 case IEEE80211_STYPE_AUTH:
8d61ffa5 3241 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
66e67e41
JB		 3242 break;
3243 case IEEE80211_STYPE_DEAUTH:
8d61ffa5 3244 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
66e67e41
JB		 3245 break;
3246 case IEEE80211_STYPE_DISASSOC:
8d61ffa5 3247 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
66e67e41
JB		 3248 break;
3249 case IEEE80211_STYPE_ASSOC_RESP:
3250 case IEEE80211_STYPE_REASSOC_RESP:
8d61ffa5 3251 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
66e67e41
JB		 3252 break;
3253 case IEEE80211_STYPE_ACTION:
37799e52 3254 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
1b3a2e49
JB		 3255 ies_len = skb->len -
3256 offsetof(struct ieee80211_mgmt,
3257 u.action.u.chan_switch.variable);
37799e52
JB		 3258
3259 if (ies_len < 0)
3260 break;
3261
3262 ieee802_11_parse_elems(
3263 mgmt->u.action.u.chan_switch.variable,
b2e506bf 3264 ies_len, true, &elems);
37799e52
JB		 3265
3266 if (elems.parse_error)
3267 break;
3268
1b3a2e49
JB		 3269 ieee80211_sta_process_chanswitch(sdata,
3270 rx_status->mactime,
04a161f4 3271 &elems, false);
1b3a2e49
JB		 3272 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3273 ies_len = skb->len -
3274 offsetof(struct ieee80211_mgmt,
3275 u.action.u.ext_chan_switch.variable);
3276
3277 if (ies_len < 0)
3278 break;
3279
3280 ieee802_11_parse_elems(
3281 mgmt->u.action.u.ext_chan_switch.variable,
b2e506bf 3282 ies_len, true, &elems);
1b3a2e49
JB		 3283
3284 if (elems.parse_error)
3285 break;
3286
3287 /* for the handling code pretend this was also an IE */
3288 elems.ext_chansw_ie =
3289 &mgmt->u.action.u.ext_chan_switch.data;
3290
66e67e41 3291 ieee80211_sta_process_chanswitch(sdata,
37799e52 3292 rx_status->mactime,
04a161f4 3293 &elems, false);
77fdaa12 3294 }
37799e52 3295 break;
77fdaa12 3296 }
8d61ffa5 3297 sdata_unlock(sdata);
f0706e82
JB		 3298}
3299
9c6bd790 3300static void ieee80211_sta_timer(unsigned long data)
f0706e82 3301{
60f8b39c
JB		 3302 struct ieee80211_sub_if_data *sdata =
3303 (struct ieee80211_sub_if_data *) data;
5bb644a0 3304
9b7d72c1 3305 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
f0706e82
JB		 3306}
3307
04ac3c0e 3308static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
6b684db1 3309 u8 *bssid, u8 reason, bool tx)
04ac3c0e 3310{
6ae16775 3311 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
04ac3c0e 3312
37ad3888 3313 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
6b684db1 3314 tx, frame_buf);
37ad3888 3315
6ff57cf8
JB		 3316 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3317 IEEE80211_DEAUTH_FRAME_LEN);
04ac3c0e
FF		 3318}
3319
66e67e41
JB		 3320static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
3321{
3322 struct ieee80211_local *local = sdata->local;
3323 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3324 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
1672c0e3 3325 u32 tx_flags = 0;
66e67e41 3326
8d61ffa5 3327 sdata_assert_lock(sdata);
66e67e41
JB		 3328
3329 if (WARN_ON_ONCE(!auth_data))
3330 return -EINVAL;
3331
66e67e41
JB		 3332 auth_data->tries++;
3333
3334 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
bdcbd8e0
JB		 3335 sdata_info(sdata, "authentication with %pM timed out\n",
3336 auth_data->bss->bssid);
66e67e41
JB		 3337
3338 /*
3339 * Most likely AP is not in the range so remove the
3340 * bss struct for that AP.
3341 */
3342 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3343
3344 return -ETIMEDOUT;
3345 }
3346
a1845fc7
JB		 3347 drv_mgd_prepare_tx(local, sdata);
3348
66e67e41 3349 if (auth_data->bss->proberesp_ies) {
6b8ece3a
JM		 3350 u16 trans = 1;
3351 u16 status = 0;
3352
bdcbd8e0
JB		 3353 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3354 auth_data->bss->bssid, auth_data->tries,
3355 IEEE80211_AUTH_MAX_TRIES);
66e67e41
JB		 3356
3357 auth_data->expected_transaction = 2;
6b8ece3a
JM		 3358
3359 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3360 trans = auth_data->sae_trans;
3361 status = auth_data->sae_status;
3362 auth_data->expected_transaction = trans;
3363 }
3364
6211dd12
SG		 3365 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3366 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3367 IEEE80211_TX_INTFL_MLME_CONN_TX;
3368
6b8ece3a
JM		 3369 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3370 auth_data->data, auth_data->data_len,
66e67e41 3371 auth_data->bss->bssid,
1672c0e3
JB		 3372 auth_data->bss->bssid, NULL, 0, 0,
3373 tx_flags);
66e67e41
JB		 3374 } else {
3375 const u8 *ssidie;
3376
bdcbd8e0
JB		 3377 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
3378 auth_data->bss->bssid, auth_data->tries,
3379 IEEE80211_AUTH_MAX_TRIES);
66e67e41 3380
9caf0364 3381 rcu_read_lock();
66e67e41 3382 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
9caf0364
JB		 3383 if (!ssidie) {
3384 rcu_read_unlock();
66e67e41 3385 return -EINVAL;
9caf0364 3386 }
66e67e41
JB		 3387 /*
3388 * Direct probe is sent to broadcast address as some APs
3389 * will not answer to direct packet in unassociated state.
3390 */
3391 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
6211dd12 3392 NULL, 0, (u32) -1, true, 0,
55de908a 3393 auth_data->bss->channel, false);
9caf0364 3394 rcu_read_unlock();
66e67e41
JB		 3395 }
3396
6211dd12 3397 if (tx_flags == 0) {
1672c0e3 3398 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
cb236d2d 3399 auth_data->timeout_started = true;
8d61ffa5 3400 run_again(sdata, auth_data->timeout);
89afe614 3401 } else {
cb236d2d
JB		 3402 auth_data->timeout =
3403 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3404 auth_data->timeout_started = true;
3405 run_again(sdata, auth_data->timeout);
1672c0e3 3406 }
66e67e41
JB		 3407
3408 return 0;
3409}
3410
3411static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3412{
3413 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3414 struct ieee80211_local *local = sdata->local;
3415
8d61ffa5 3416 sdata_assert_lock(sdata);
66e67e41 3417
66e67e41
JB		 3418 assoc_data->tries++;
3419 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
bdcbd8e0
JB		 3420 sdata_info(sdata, "association with %pM timed out\n",
3421 assoc_data->bss->bssid);
66e67e41
JB		 3422
3423 /*
3424 * Most likely AP is not in the range so remove the
3425 * bss struct for that AP.
3426 */
3427 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3428
3429 return -ETIMEDOUT;
3430 }
3431
bdcbd8e0
JB		 3432 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3433 assoc_data->bss->bssid, assoc_data->tries,
3434 IEEE80211_ASSOC_MAX_TRIES);
66e67e41
JB		 3435 ieee80211_send_assoc(sdata);
3436
1672c0e3
JB		 3437 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
3438 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
89afe614 3439 assoc_data->timeout_started = true;
8d61ffa5 3440 run_again(sdata, assoc_data->timeout);
89afe614 3441 } else {
cb236d2d
JB		 3442 assoc_data->timeout =
3443 round_jiffies_up(jiffies +
3444 IEEE80211_ASSOC_TIMEOUT_LONG);
3445 assoc_data->timeout_started = true;
3446 run_again(sdata, assoc_data->timeout);
1672c0e3 3447 }
66e67e41
JB		 3448
3449 return 0;
3450}
3451
1672c0e3
JB		 3452void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3453 __le16 fc, bool acked)
3454{
3455 struct ieee80211_local *local = sdata->local;
3456
3457 sdata->u.mgd.status_fc = fc;
3458 sdata->u.mgd.status_acked = acked;
3459 sdata->u.mgd.status_received = true;
3460
3461 ieee80211_queue_work(&local->hw, &sdata->work);
3462}
3463
1fa57d01 3464void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 3465{
9c6bd790 3466 struct ieee80211_local *local = sdata->local;
1fa57d01 3467 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 3468
8d61ffa5 3469 sdata_lock(sdata);
77fdaa12 3470
1672c0e3
JB		 3471 if (ifmgd->status_received) {
3472 __le16 fc = ifmgd->status_fc;
3473 bool status_acked = ifmgd->status_acked;
3474
3475 ifmgd->status_received = false;
3476 if (ifmgd->auth_data &&
3477 (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) {
3478 if (status_acked) {
3479 ifmgd->auth_data->timeout =
3480 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
8d61ffa5 3481 run_again(sdata, ifmgd->auth_data->timeout);
1672c0e3
JB		 3482 } else {
3483 ifmgd->auth_data->timeout = jiffies - 1;
3484 }
89afe614 3485 ifmgd->auth_data->timeout_started = true;
1672c0e3
JB		 3486 } else if (ifmgd->assoc_data &&
3487 (ieee80211_is_assoc_req(fc) ||
3488 ieee80211_is_reassoc_req(fc))) {
3489 if (status_acked) {
3490 ifmgd->assoc_data->timeout =
3491 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
8d61ffa5 3492 run_again(sdata, ifmgd->assoc_data->timeout);
1672c0e3
JB		 3493 } else {
3494 ifmgd->assoc_data->timeout = jiffies - 1;
3495 }
89afe614 3496 ifmgd->assoc_data->timeout_started = true;
1672c0e3
JB		 3497 }
3498 }
3499
89afe614 3500 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
66e67e41
JB		 3501 time_after(jiffies, ifmgd->auth_data->timeout)) {
3502 if (ifmgd->auth_data->done) {
3503 /*
3504 * ok ... we waited for assoc but userspace didn't,
3505 * so let's just kill the auth data
3506 */
3507 ieee80211_destroy_auth_data(sdata, false);
3508 } else if (ieee80211_probe_auth(sdata)) {
3509 u8 bssid[ETH_ALEN];
3510
3511 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3512
3513 ieee80211_destroy_auth_data(sdata, false);
3514
6ff57cf8 3515 cfg80211_auth_timeout(sdata->dev, bssid);
66e67e41 3516 }
89afe614 3517 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
8d61ffa5 3518 run_again(sdata, ifmgd->auth_data->timeout);
66e67e41 3519
89afe614 3520 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
66e67e41 3521 time_after(jiffies, ifmgd->assoc_data->timeout)) {
989c6505 3522 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
66e67e41 3523 ieee80211_do_assoc(sdata)) {
959867fa 3524 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
66e67e41
JB		 3525
3526 ieee80211_destroy_assoc_data(sdata, false);
959867fa 3527 cfg80211_assoc_timeout(sdata->dev, bss);
66e67e41 3528 }
89afe614 3529 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
8d61ffa5 3530 run_again(sdata, ifmgd->assoc_data->timeout);
66e67e41 3531
392b9ffb 3532 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
b291ba11 3533 ifmgd->associated) {
a43abf29 3534 u8 bssid[ETH_ALEN];
72a8a3ed 3535 int max_tries;
a43abf29 3536
0c1ad2ca 3537 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 3538
72a8a3ed 3539 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
180205bd 3540 max_tries = max_nullfunc_tries;
72a8a3ed 3541 else
180205bd 3542 max_tries = max_probe_tries;
72a8a3ed 3543
4e5ff376
FF		 3544 /* ACK received for nullfunc probing frame */
3545 if (!ifmgd->probe_send_count)
3546 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 3547 else if (ifmgd->nullfunc_failed) {
3548 if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3549 mlme_dbg(sdata,
3550 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3551 bssid, ifmgd->probe_send_count,
3552 max_tries);
04ac3c0e
FF		 3553 ieee80211_mgd_probe_ap_send(sdata);
3554 } else {
bdcbd8e0
JB		 3555 mlme_dbg(sdata,
3556 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3557 bssid);
95acac61 3558 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1
JB		 3559 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3560 false);
04ac3c0e
FF		 3561 }
3562 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
8d61ffa5 3563 run_again(sdata, ifmgd->probe_timeout);
04ac3c0e 3564 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
bdcbd8e0
JB		 3565 mlme_dbg(sdata,
3566 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3567 bssid, probe_wait_ms);
95acac61 3568 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 3569 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
04ac3c0e 3570 } else if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3571 mlme_dbg(sdata,
3572 "No probe response from AP %pM after %dms, try %d/%i\n",
3573 bssid, probe_wait_ms,
3574 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 3575 ieee80211_mgd_probe_ap_send(sdata);
3576 } else {
b291ba11
JB		 3577 /*
3578 * We actually lost the connection ... or did we?
3579 * Let's make sure!
3580 */
b38afa87
BG		 3581 wiphy_debug(local->hw.wiphy,
3582 "%s: No probe response from AP %pM"
3583 " after %dms, disconnecting.\n",
3584 sdata->name,
180205bd 3585 bssid, probe_wait_ms);
04ac3c0e 3586
95acac61 3587 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 3588 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
b291ba11
JB		 3589 }
3590 }
3591
8d61ffa5 3592 sdata_unlock(sdata);
f0706e82
JB		 3593}
3594
b291ba11
JB		 3595static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3596{
3597 struct ieee80211_sub_if_data *sdata =
3598 (struct ieee80211_sub_if_data *) data;
3599 struct ieee80211_local *local = sdata->local;
3600
3601 if (local->quiescing)
3602 return;
3603
e5593f56
MK		 3604 if (sdata->vif.csa_active)
3605 return;
3606
682bd38b 3607 sdata->u.mgd.connection_loss = false;
1e4dcd01
JO		 3608 ieee80211_queue_work(&sdata->local->hw,
3609 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 3610}
3611
3612static void ieee80211_sta_conn_mon_timer(unsigned long data)
3613{
3614 struct ieee80211_sub_if_data *sdata =
3615 (struct ieee80211_sub_if_data *) data;
3616 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3617 struct ieee80211_local *local = sdata->local;
3618
3619 if (local->quiescing)
3620 return;
3621
e5593f56
MK		 3622 if (sdata->vif.csa_active)
3623 return;
3624
42935eca 3625 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 3626}
3627
3628static void ieee80211_sta_monitor_work(struct work_struct *work)
3629{
3630 struct ieee80211_sub_if_data *sdata =
3631 container_of(work, struct ieee80211_sub_if_data,
3632 u.mgd.monitor_work);
3633
3634 ieee80211_mgd_probe_ap(sdata, false);
3635}
3636
9c6bd790
JB		 3637static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3638{
494f1fe5
EP		 3639 u32 flags;
3640
ad935687 3641 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
925e64c3 3642 __ieee80211_stop_poll(sdata);
ad935687 3643
b291ba11 3644 /* let's probe the connection once */
494f1fe5
EP		 3645 flags = sdata->local->hw.flags;
3646 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3647 ieee80211_queue_work(&sdata->local->hw,
3648 &sdata->u.mgd.monitor_work);
b291ba11 3649 /* and do all the other regular work too */
64592c8f 3650 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 3651 }
9c6bd790 3652}
f0706e82 3653
b8360ab8 3654#ifdef CONFIG_PM
1a1cb744
JB		 3655void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
3656{
3657 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3658 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3659
3660 sdata_lock(sdata);
3661
c52666ae
EG		 3662 if (ifmgd->auth_data || ifmgd->assoc_data) {
3663 const u8 *bssid = ifmgd->auth_data ?
3664 ifmgd->auth_data->bss->bssid :
3665 ifmgd->assoc_data->bss->bssid;
3666
1a1cb744 3667 /*
c52666ae
EG		 3668 * If we are trying to authenticate / associate while suspending,
3669 * cfg80211 won't know and won't actually abort those attempts,
3670 * thus we need to do that ourselves.
1a1cb744 3671 */
c52666ae 3672 ieee80211_send_deauth_disassoc(sdata, bssid,
1a1cb744
JB		 3673 IEEE80211_STYPE_DEAUTH,
3674 WLAN_REASON_DEAUTH_LEAVING,
3675 false, frame_buf);
c52666ae
EG		 3676 if (ifmgd->assoc_data)
3677 ieee80211_destroy_assoc_data(sdata, false);
3678 if (ifmgd->auth_data)
3679 ieee80211_destroy_auth_data(sdata, false);
1a1cb744
JB		 3680 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3681 IEEE80211_DEAUTH_FRAME_LEN);
3682 }
3683
3684 sdata_unlock(sdata);
3685}
3686
b8360ab8
JB		 3687void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
3688{
3689 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3690
8d61ffa5 3691 sdata_lock(sdata);
b8360ab8 3692 if (!ifmgd->associated) {
8d61ffa5 3693 sdata_unlock(sdata);
b8360ab8
JB		 3694 return;
3695 }
3696
3697 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
3698 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
3699 mlme_dbg(sdata, "driver requested disconnect after resume\n");
3700 ieee80211_sta_connection_lost(sdata,
3701 ifmgd->associated->bssid,
3702 WLAN_REASON_UNSPECIFIED,
3703 true);
8d61ffa5 3704 sdata_unlock(sdata);
b8360ab8
JB		 3705 return;
3706 }
8d61ffa5 3707 sdata_unlock(sdata);
b8360ab8
JB		 3708}
3709#endif
3710
9c6bd790
JB		 3711/* interface setup */
3712void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 3713{
46900298 3714 struct ieee80211_if_managed *ifmgd;
988c0f72 3715
46900298 3716 ifmgd = &sdata->u.mgd;
b291ba11 3717 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 3718 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 3719 INIT_WORK(&ifmgd->beacon_connection_loss_work,
3720 ieee80211_beacon_connection_loss_work);
882a7c69
JB		 3721 INIT_WORK(&ifmgd->csa_connection_drop_work,
3722 ieee80211_csa_connection_drop_work);
687da132 3723 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
81dd2b88
AN		 3724 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
3725 ieee80211_tdls_peer_del_work);
46900298 3726 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 3727 (unsigned long) sdata);
b291ba11
JB		 3728 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
3729 (unsigned long) sdata);
3730 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
3731 (unsigned long) sdata);
46900298 3732 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 3733 (unsigned long) sdata);
9c6bd790 3734
ab1faead 3735 ifmgd->flags = 0;
1478acb3 3736 ifmgd->powersave = sdata->wdev.ps;
219c3867
AB		 3737 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
3738 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
67baf663 3739 ifmgd->p2p_noa_index = -1;
bbbdff9e 3740
0f78231b
JB		 3741 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
3742 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
3743 else
3744 ifmgd->req_smps = IEEE80211_SMPS_OFF;
f0706e82
JB		 3745}
3746
77fdaa12
JB		 3747/* scan finished notification */
3748void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 3749{
31ee67a1 3750 struct ieee80211_sub_if_data *sdata;
60f8b39c 3751
77fdaa12
JB		 3752 /* Restart STA timers */
3753 rcu_read_lock();
370bd005
BG		 3754 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3755 if (ieee80211_sdata_running(sdata))
3756 ieee80211_restart_sta_timer(sdata);
3757 }
77fdaa12
JB		 3758 rcu_read_unlock();
3759}
60f8b39c 3760
77fdaa12
JB		 3761int ieee80211_max_network_latency(struct notifier_block *nb,
3762 unsigned long data, void *dummy)
3763{
3764 s32 latency_usec = (s32) data;
3765 struct ieee80211_local *local =
3766 container_of(nb, struct ieee80211_local,
3767 network_latency_notifier);
1fa6f4af 3768
77fdaa12
JB		 3769 mutex_lock(&local->iflist_mtx);
3770 ieee80211_recalc_ps(local, latency_usec);
3771 mutex_unlock(&local->iflist_mtx);
dfe67012 3772
8bd811aa 3773 return NOTIFY_OK;
9c6bd790
JB		 3774}
3775
f2d9d270
JB		 3776static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
3777 struct cfg80211_bss *cbss)
3778{
3779 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3780 const u8 *ht_cap_ie, *vht_cap_ie;
3781 const struct ieee80211_ht_cap *ht_cap;
3782 const struct ieee80211_vht_cap *vht_cap;
3783 u8 chains = 1;
3784
3785 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
3786 return chains;
3787
9caf0364 3788 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
f2d9d270
JB		 3789 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
3790 ht_cap = (void *)(ht_cap_ie + 2);
3791 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
3792 /*
3793 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
3794 * "Tx Unequal Modulation Supported" fields.
3795 */
3796 }
3797
3798 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
3799 return chains;
3800
9caf0364 3801 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
f2d9d270
JB		 3802 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
3803 u8 nss;
3804 u16 tx_mcs_map;
3805
3806 vht_cap = (void *)(vht_cap_ie + 2);
3807 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
3808 for (nss = 8; nss > 0; nss--) {
3809 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
3810 IEEE80211_VHT_MCS_NOT_SUPPORTED)
3811 break;
3812 }
3813 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
3814 chains = max(chains, nss);
3815 }
3816
3817 return chains;
3818}
3819
b17166a7
JB		 3820static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
3821 struct cfg80211_bss *cbss)
a1cf775d
JB		 3822{
3823 struct ieee80211_local *local = sdata->local;
3824 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
53b954ee 3825 const struct ieee80211_ht_cap *ht_cap = NULL;
24398e39 3826 const struct ieee80211_ht_operation *ht_oper = NULL;
f2d9d270 3827 const struct ieee80211_vht_operation *vht_oper = NULL;
24398e39 3828 struct ieee80211_supported_band *sband;
4bf88530 3829 struct cfg80211_chan_def chandef;
f2d9d270 3830 int ret;
a1cf775d 3831
24398e39
JB		 3832 sband = local->hw.wiphy->bands[cbss->channel->band];
3833
f2d9d270
JB		 3834 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
3835 IEEE80211_STA_DISABLE_80P80MHZ |
3836 IEEE80211_STA_DISABLE_160MHZ);
3837
9caf0364
JB		 3838 rcu_read_lock();
3839
f2d9d270
JB		 3840 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3841 sband->ht_cap.ht_supported) {
53b954ee 3842 const u8 *ht_oper_ie, *ht_cap_ie;
24398e39 3843
9caf0364 3844 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
24398e39
JB		 3845 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3846 ht_oper = (void *)(ht_oper_ie + 2);
08e6effa 3847
53b954ee
EP		 3848 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
3849 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
3850 ht_cap = (void *)(ht_cap_ie + 2);
3851
3852 if (!ht_cap) {
08e6effa
JB		 3853 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3854 ht_oper = NULL;
3855 }
24398e39
JB		 3856 }
3857
f2d9d270
JB		 3858 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3859 sband->vht_cap.vht_supported) {
08e6effa 3860 const u8 *vht_oper_ie, *vht_cap;
f2d9d270 3861
9caf0364
JB		 3862 vht_oper_ie = ieee80211_bss_get_ie(cbss,
3863 WLAN_EID_VHT_OPERATION);
f2d9d270
JB		 3864 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
3865 vht_oper = (void *)(vht_oper_ie + 2);
3866 if (vht_oper && !ht_oper) {
3867 vht_oper = NULL;
bdcbd8e0 3868 sdata_info(sdata,
f2d9d270 3869 "AP advertised VHT without HT, disabling both\n");
cb145022
JB		 3870 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3871 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
24398e39 3872 }
08e6effa
JB		 3873
3874 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
3875 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
3876 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3877 vht_oper = NULL;
3878 }
24398e39
JB		 3879 }
3880
f2d9d270
JB		 3881 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
3882 cbss->channel,
53b954ee 3883 ht_cap, ht_oper, vht_oper,
5cdaed1e 3884 &chandef, false);
04ecd257 3885
f2d9d270
JB		 3886 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
3887 local->rx_chains);
24398e39 3888
9caf0364
JB		 3889 rcu_read_unlock();
3890
04ecd257
JB		 3891 /* will change later if needed */
3892 sdata->smps_mode = IEEE80211_SMPS_OFF;
3893
34a3740d 3894 mutex_lock(&local->mtx);
f2d9d270
JB		 3895 /*
3896 * If this fails (possibly due to channel context sharing
3897 * on incompatible channels, e.g. 80+80 and 160 sharing the
3898 * same control channel) try to use a smaller bandwidth.
3899 */
3900 ret = ieee80211_vif_use_channel(sdata, &chandef,
3901 IEEE80211_CHANCTX_SHARED);
0418a445
SW		 3902
3903 /* don't downgrade for 5 and 10 MHz channels, though. */
3904 if (chandef.width == NL80211_CHAN_WIDTH_5 ||
3905 chandef.width == NL80211_CHAN_WIDTH_10)
34a3740d 3906 goto out;
0418a445 3907
d601cd8d 3908 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
e6b7cde4 3909 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
d601cd8d
JB		 3910 ret = ieee80211_vif_use_channel(sdata, &chandef,
3911 IEEE80211_CHANCTX_SHARED);
3912 }
34a3740d
JB		 3913 out:
3914 mutex_unlock(&local->mtx);
f2d9d270 3915 return ret;
b17166a7
JB		 3916}
3917
3918static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
3919 struct cfg80211_bss *cbss, bool assoc)
3920{
3921 struct ieee80211_local *local = sdata->local;
3922 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3923 struct ieee80211_bss *bss = (void *)cbss->priv;
3924 struct sta_info *new_sta = NULL;
3925 bool have_sta = false;
3926 int err;
3927
3928 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3929 return -EINVAL;
3930
3931 if (assoc) {
3932 rcu_read_lock();
3933 have_sta = sta_info_get(sdata, cbss->bssid);
3934 rcu_read_unlock();
3935 }
3936
3937 if (!have_sta) {
3938 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
3939 if (!new_sta)
3940 return -ENOMEM;
3941 }
13e0c8e3 3942 if (new_sta) {
5d6a1b06
JB		 3943 u32 rates = 0, basic_rates = 0;
3944 bool have_higher_than_11mbit;
3945 int min_rate = INT_MAX, min_rate_index = -1;
2103dec1 3946 struct ieee80211_chanctx_conf *chanctx_conf;
b17166a7 3947 struct ieee80211_supported_band *sband;
8cef2c9d 3948 const struct cfg80211_bss_ies *ies;
2103dec1
SW		 3949 int shift;
3950 u32 rate_flags;
b17166a7
JB		 3951
3952 sband = local->hw.wiphy->bands[cbss->channel->band];
3953
3954 err = ieee80211_prep_channel(sdata, cbss);
3955 if (err) {
3956 sta_info_free(local, new_sta);
2103dec1 3957 return -EINVAL;
b17166a7 3958 }
2103dec1
SW		 3959 shift = ieee80211_vif_get_shift(&sdata->vif);
3960
3961 rcu_read_lock();
3962 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3963 if (WARN_ON(!chanctx_conf)) {
3964 rcu_read_unlock();
c368ddaa 3965 sta_info_free(local, new_sta);
2103dec1
SW		 3966 return -EINVAL;
3967 }
3968 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
3969 rcu_read_unlock();
5d6a1b06 3970
5d6a1b06
JB		 3971 ieee80211_get_rates(sband, bss->supp_rates,
3972 bss->supp_rates_len,
3973 &rates, &basic_rates,
3974 &have_higher_than_11mbit,
2103dec1
SW		 3975 &min_rate, &min_rate_index,
3976 shift, rate_flags);
5d6a1b06
JB		 3977
3978 /*
3979 * This used to be a workaround for basic rates missing
3980 * in the association response frame. Now that we no
3981 * longer use the basic rates from there, it probably
3982 * doesn't happen any more, but keep the workaround so
3983 * in case some *other* APs are buggy in different ways
3984 * we can connect -- with a warning.
3985 */
3986 if (!basic_rates && min_rate_index >= 0) {
bdcbd8e0
JB		 3987 sdata_info(sdata,
3988 "No basic rates, using min rate instead\n");
5d6a1b06
JB		 3989 basic_rates = BIT(min_rate_index);
3990 }
3991
13e0c8e3 3992 new_sta->sta.supp_rates[cbss->channel->band] = rates;
5d6a1b06
JB		 3993 sdata->vif.bss_conf.basic_rates = basic_rates;
3994
3995 /* cf. IEEE 802.11 9.2.12 */
55de908a 3996 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
5d6a1b06
JB		 3997 have_higher_than_11mbit)
3998 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3999 else
4000 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
4001
4002 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
4003
8c358bcd
JB		 4004 /* set timing information */
4005 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
8cef2c9d 4006 rcu_read_lock();
ef429dad
JB		 4007 ies = rcu_dereference(cbss->beacon_ies);
4008 if (ies) {
4009 const u8 *tim_ie;
4010
4011 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4012 sdata->vif.bss_conf.sync_device_ts =
4013 bss->device_ts_beacon;
4014 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4015 ies->data, ies->len);
4016 if (tim_ie && tim_ie[1] >= 2)
4017 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
4018 else
4019 sdata->vif.bss_conf.sync_dtim_count = 0;
4020 } else if (!(local->hw.flags &
4021 IEEE80211_HW_TIMING_BEACON_ONLY)) {
4022 ies = rcu_dereference(cbss->proberesp_ies);
4023 /* must be non-NULL since beacon IEs were NULL */
4024 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4025 sdata->vif.bss_conf.sync_device_ts =
4026 bss->device_ts_presp;
4027 sdata->vif.bss_conf.sync_dtim_count = 0;
4028 } else {
4029 sdata->vif.bss_conf.sync_tsf = 0;
4030 sdata->vif.bss_conf.sync_device_ts = 0;
4031 sdata->vif.bss_conf.sync_dtim_count = 0;
4032 }
8cef2c9d 4033 rcu_read_unlock();
8c358bcd
JB		 4034
4035 /* tell driver about BSSID, basic rates and timing */
5d6a1b06 4036 ieee80211_bss_info_change_notify(sdata,
8c358bcd
JB		 4037 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4038 BSS_CHANGED_BEACON_INT);
a1cf775d
JB		 4039
4040 if (assoc)
13e0c8e3 4041 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
a1cf775d 4042
13e0c8e3
JB		 4043 err = sta_info_insert(new_sta);
4044 new_sta = NULL;
a1cf775d 4045 if (err) {
bdcbd8e0
JB		 4046 sdata_info(sdata,
4047 "failed to insert STA entry for the AP (error %d)\n",
4048 err);
a1cf775d
JB		 4049 return err;
4050 }
4051 } else
b203ca39 4052 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
a1cf775d
JB		 4053
4054 return 0;
4055}
4056
77fdaa12
JB		 4057/* config hooks */
4058int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4059 struct cfg80211_auth_request *req)
9c6bd790 4060{
66e67e41
JB		 4061 struct ieee80211_local *local = sdata->local;
4062 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4063 struct ieee80211_mgd_auth_data *auth_data;
77fdaa12 4064 u16 auth_alg;
66e67e41
JB		 4065 int err;
4066
4067 /* prepare auth data structure */
9c6bd790 4068
77fdaa12
JB		 4069 switch (req->auth_type) {
4070 case NL80211_AUTHTYPE_OPEN_SYSTEM:
4071 auth_alg = WLAN_AUTH_OPEN;
4072 break;
4073 case NL80211_AUTHTYPE_SHARED_KEY:
66e67e41 4074 if (IS_ERR(local->wep_tx_tfm))
9dca9c49 4075 return -EOPNOTSUPP;
77fdaa12
JB		 4076 auth_alg = WLAN_AUTH_SHARED_KEY;
4077 break;
4078 case NL80211_AUTHTYPE_FT:
4079 auth_alg = WLAN_AUTH_FT;
4080 break;
4081 case NL80211_AUTHTYPE_NETWORK_EAP:
4082 auth_alg = WLAN_AUTH_LEAP;
4083 break;
6b8ece3a
JM		 4084 case NL80211_AUTHTYPE_SAE:
4085 auth_alg = WLAN_AUTH_SAE;
4086 break;
77fdaa12
JB		 4087 default:
4088 return -EOPNOTSUPP;
60f8b39c 4089 }
77fdaa12 4090
6b8ece3a
JM		 4091 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
4092 req->ie_len, GFP_KERNEL);
66e67e41 4093 if (!auth_data)
9c6bd790 4094 return -ENOMEM;
77fdaa12 4095
66e67e41 4096 auth_data->bss = req->bss;
77fdaa12 4097
6b8ece3a
JM		 4098 if (req->sae_data_len >= 4) {
4099 __le16 *pos = (__le16 *) req->sae_data;
4100 auth_data->sae_trans = le16_to_cpu(pos[0]);
4101 auth_data->sae_status = le16_to_cpu(pos[1]);
4102 memcpy(auth_data->data, req->sae_data + 4,
4103 req->sae_data_len - 4);
4104 auth_data->data_len += req->sae_data_len - 4;
4105 }
4106
77fdaa12 4107 if (req->ie && req->ie_len) {
6b8ece3a
JM		 4108 memcpy(&auth_data->data[auth_data->data_len],
4109 req->ie, req->ie_len);
4110 auth_data->data_len += req->ie_len;
9c6bd790 4111 }
77fdaa12 4112
fffd0934 4113 if (req->key && req->key_len) {
66e67e41
JB		 4114 auth_data->key_len = req->key_len;
4115 auth_data->key_idx = req->key_idx;
4116 memcpy(auth_data->key, req->key, req->key_len);
fffd0934
JB		 4117 }
4118
66e67e41 4119 auth_data->algorithm = auth_alg;
60f8b39c 4120
66e67e41 4121 /* try to authenticate/probe */
2a33bee2 4122
66e67e41
JB		 4123 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4124 ifmgd->assoc_data) {
4125 err = -EBUSY;
4126 goto err_free;
2a33bee2
GE		 4127 }
4128
66e67e41
JB		 4129 if (ifmgd->auth_data)
4130 ieee80211_destroy_auth_data(sdata, false);
2a33bee2 4131
66e67e41
JB		 4132 /* prep auth_data so we don't go into idle on disassoc */
4133 ifmgd->auth_data = auth_data;
af6b6374 4134
7b119dc0
JB		 4135 if (ifmgd->associated) {
4136 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4137
4138 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4139 WLAN_REASON_UNSPECIFIED,
4140 false, frame_buf);
4141
6ff57cf8
JB		 4142 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4143 sizeof(frame_buf));
7b119dc0 4144 }
af6b6374 4145
bdcbd8e0 4146 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
e5b900d2 4147
a1cf775d
JB		 4148 err = ieee80211_prep_connection(sdata, req->bss, false);
4149 if (err)
66e67e41 4150 goto err_clear;
af6b6374 4151
66e67e41
JB		 4152 err = ieee80211_probe_auth(sdata);
4153 if (err) {
66e67e41
JB		 4154 sta_info_destroy_addr(sdata, req->bss->bssid);
4155 goto err_clear;
4156 }
4157
4158 /* hold our own reference */
5b112d3d 4159 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
8d61ffa5 4160 return 0;
66e67e41
JB		 4161
4162 err_clear:
3d2abdfd
EP		 4163 memset(ifmgd->bssid, 0, ETH_ALEN);
4164 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 4165 ifmgd->auth_data = NULL;
4166 err_free:
4167 kfree(auth_data);
66e67e41 4168 return err;
af6b6374
JB		 4169}
4170
095d81ce
JB		 4171static bool ieee80211_usable_wmm_params(struct ieee80211_sub_if_data *sdata,
4172 const u8 *wmm_param, int len)
4173{
4174 const u8 *pos;
4175 size_t left;
4176
4177 if (len < 8)
4178 return false;
4179
4180 if (wmm_param[5] != 1 /* version */)
4181 return false;
4182
4183 pos = wmm_param + 8;
4184 left = len - 8;
4185
4186 for (; left >= 4; left -= 4, pos += 4) {
4187 u8 aifsn = pos[0] & 0x0f;
4188 u8 ecwmin = pos[1] & 0x0f;
4189 u8 ecwmax = (pos[1] & 0xf0) >> 4;
4190 int aci = (pos[0] >> 5) & 0x03;
4191
4192 if (aifsn < 2) {
4193 sdata_info(sdata,
4194 "AP has invalid WMM params (AIFSN=%d for ACI %d), disabling WMM\n",
4195 aifsn, aci);
4196 return false;
4197 }
4198 if (ecwmin > ecwmax) {
4199 sdata_info(sdata,
4200 "AP has invalid WMM params (ECWmin/max=%d/%d for ACI %d), disabling WMM\n",
4201 ecwmin, ecwmax, aci);
4202 return false;
4203 }
4204 }
4205
4206 return true;
4207}
4208
77fdaa12
JB		 4209int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4210 struct cfg80211_assoc_request *req)
f0706e82 4211{
66e67e41 4212 struct ieee80211_local *local = sdata->local;
77fdaa12 4213 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 4214 struct ieee80211_bss *bss = (void *)req->bss->priv;
66e67e41 4215 struct ieee80211_mgd_assoc_data *assoc_data;
c65dd147 4216 const struct cfg80211_bss_ies *beacon_ies;
4e74bfdb 4217 struct ieee80211_supported_band *sband;
b08fbbd8 4218 const u8 *ssidie, *ht_ie, *vht_ie;
2a33bee2 4219 int i, err;
f0706e82 4220
66e67e41
JB		 4221 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4222 if (!assoc_data)
4223 return -ENOMEM;
4224
9caf0364
JB		 4225 rcu_read_lock();
4226 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4227 if (!ssidie) {
4228 rcu_read_unlock();
4229 kfree(assoc_data);
4230 return -EINVAL;
4231 }
4232 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4233 assoc_data->ssid_len = ssidie[1];
4234 rcu_read_unlock();
4235
7b119dc0
JB		 4236 if (ifmgd->associated) {
4237 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4238
4239 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4240 WLAN_REASON_UNSPECIFIED,
4241 false, frame_buf);
4242
6ff57cf8
JB		 4243 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4244 sizeof(frame_buf));
7b119dc0 4245 }
66e67e41
JB		 4246
4247 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4248 err = -EBUSY;
4249 goto err_free;
af6b6374 4250 }
77fdaa12 4251
66e67e41
JB		 4252 if (ifmgd->assoc_data) {
4253 err = -EBUSY;
4254 goto err_free;
4255 }
77fdaa12 4256
66e67e41
JB		 4257 if (ifmgd->auth_data) {
4258 bool match;
4259
4260 /* keep sta info, bssid if matching */
b203ca39 4261 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
66e67e41 4262 ieee80211_destroy_auth_data(sdata, match);
2a33bee2
GE		 4263 }
4264
66e67e41 4265 /* prepare assoc data */
095d81ce 4266
d8ec4433
JO		 4267 ifmgd->beacon_crc_valid = false;
4268
095d81ce
JB		 4269 assoc_data->wmm = bss->wmm_used &&
4270 (local->hw.queues >= IEEE80211_NUM_ACS);
4271 if (assoc_data->wmm) {
4272 /* try to check validity of WMM params IE */
4273 const struct cfg80211_bss_ies *ies;
4274 const u8 *wp, *start, *end;
4275
4276 rcu_read_lock();
4277 ies = rcu_dereference(req->bss->ies);
4278 start = ies->data;
4279 end = start + ies->len;
4280
4281 while (true) {
4282 wp = cfg80211_find_vendor_ie(
4283 WLAN_OUI_MICROSOFT,
4284 WLAN_OUI_TYPE_MICROSOFT_WMM,
4285 start, end - start);
4286 if (!wp)
4287 break;
4288 start = wp + wp[1] + 2;
4289 /* if this IE is too short, try the next */
4290 if (wp[1] <= 4)
4291 continue;
4292 /* if this IE is WMM params, we found what we wanted */
4293 if (wp[6] == 1)
4294 break;
4295 }
4296
4297 if (!wp || !ieee80211_usable_wmm_params(sdata, wp + 2,
4298 wp[1] - 2)) {
4299 assoc_data->wmm = false;
4300 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
4301 }
4302 rcu_read_unlock();
4303 }
4304
de5036aa
JB		 4305 /*
4306 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4307 * We still associate in non-HT mode (11a/b/g) if any one of these
4308 * ciphers is configured as pairwise.
4309 * We can set this to true for non-11n hardware, that'll be checked
4310 * separately along with the peer capabilities.
4311 */
1c4cb928 4312 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
77fdaa12
JB		 4313 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4314 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
1c4cb928 4315 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
a8243b72 4316 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
d545daba 4317 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
1c4cb928 4318 netdev_info(sdata->dev,
d545daba 4319 "disabling HT/VHT due to WEP/TKIP use\n");
1c4cb928
JB		 4320 }
4321 }
77fdaa12 4322
d545daba 4323 if (req->flags & ASSOC_REQ_DISABLE_HT) {
a8243b72 4324 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
d545daba
MP		 4325 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4326 }
ef96a842 4327
dd5ecfea
JB		 4328 if (req->flags & ASSOC_REQ_DISABLE_VHT)
4329 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4330
4e74bfdb
JB		 4331 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4332 sband = local->hw.wiphy->bands[req->bss->channel->band];
4333 if (!sband->ht_cap.ht_supported ||
095d81ce
JB		 4334 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4335 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
a8243b72 4336 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
095d81ce
JB		 4337 if (!bss->wmm_used &&
4338 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
1b49de26
JB		 4339 netdev_info(sdata->dev,
4340 "disabling HT as WMM/QoS is not supported by the AP\n");
1c4cb928 4341 }
4e74bfdb 4342
d545daba
MP		 4343 /* disable VHT if we don't support it or the AP doesn't use WMM */
4344 if (!sband->vht_cap.vht_supported ||
095d81ce
JB		 4345 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4346 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
d545daba 4347 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
095d81ce
JB		 4348 if (!bss->wmm_used &&
4349 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
1b49de26
JB		 4350 netdev_info(sdata->dev,
4351 "disabling VHT as WMM/QoS is not supported by the AP\n");
d545daba
MP		 4352 }
4353
ef96a842
BG		 4354 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4355 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4356 sizeof(ifmgd->ht_capa_mask));
4357
dd5ecfea
JB		 4358 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4359 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4360 sizeof(ifmgd->vht_capa_mask));
4361
77fdaa12 4362 if (req->ie && req->ie_len) {
66e67e41
JB		 4363 memcpy(assoc_data->ie, req->ie, req->ie_len);
4364 assoc_data->ie_len = req->ie_len;
4365 }
f679f65d 4366
66e67e41 4367 assoc_data->bss = req->bss;
f679f65d 4368
af6b6374
JB		 4369 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4370 if (ifmgd->powersave)
04ecd257 4371 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
af6b6374 4372 else
04ecd257 4373 sdata->smps_mode = IEEE80211_SMPS_OFF;
af6b6374 4374 } else
04ecd257 4375 sdata->smps_mode = ifmgd->req_smps;
af6b6374 4376
66e67e41 4377 assoc_data->capability = req->bss->capability;
66e67e41
JB		 4378 assoc_data->supp_rates = bss->supp_rates;
4379 assoc_data->supp_rates_len = bss->supp_rates_len;
9dde6423 4380
9caf0364 4381 rcu_read_lock();
9dde6423
JB		 4382 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4383 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4384 assoc_data->ap_ht_param =
4385 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4386 else
a8243b72 4387 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
b08fbbd8
JB		 4388 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4389 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4390 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4391 sizeof(struct ieee80211_vht_cap));
4392 else
4393 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
9caf0364 4394 rcu_read_unlock();
63f170e0 4395
ab13315a 4396 if (bss->wmm_used && bss->uapsd_supported &&
24aa11ab
AB		 4397 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD) &&
4398 sdata->wmm_acm != 0xff) {
76f0303d 4399 assoc_data->uapsd = true;
ab13315a
KV		 4400 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4401 } else {
76f0303d 4402 assoc_data->uapsd = false;
ab13315a
KV		 4403 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4404 }
4405
77fdaa12 4406 if (req->prev_bssid)
66e67e41 4407 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12
JB		 4408
4409 if (req->use_mfp) {
4410 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4411 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4412 } else {
4413 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4414 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4415 }
4416
cd2f5dd7
AK		 4417 if (req->flags & ASSOC_REQ_USE_RRM)
4418 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
4419 else
4420 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
4421
77fdaa12
JB		 4422 if (req->crypto.control_port)
4423 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4424 else
4425 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4426
a621fa4d
JB		 4427 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4428 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
2475b1cc
MS		 4429 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
4430 sdata->vif.type);
a621fa4d 4431
66e67e41
JB		 4432 /* kick off associate process */
4433
4434 ifmgd->assoc_data = assoc_data;
826262c3 4435 ifmgd->dtim_period = 0;
989c6505 4436 ifmgd->have_beacon = false;
66e67e41 4437
a1cf775d
JB		 4438 err = ieee80211_prep_connection(sdata, req->bss, true);
4439 if (err)
4440 goto err_clear;
66e67e41 4441
c65dd147
EG		 4442 rcu_read_lock();
4443 beacon_ies = rcu_dereference(req->bss->beacon_ies);
826262c3 4444
c65dd147
EG		 4445 if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC &&
4446 !beacon_ies) {
4447 /*
4448 * Wait up to one beacon interval ...
4449 * should this be more if we miss one?
4450 */
4451 sdata_info(sdata, "waiting for beacon from %pM\n",
4452 ifmgd->bssid);
4453 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
89afe614 4454 assoc_data->timeout_started = true;
c65dd147
EG		 4455 assoc_data->need_beacon = true;
4456 } else if (beacon_ies) {
4457 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4458 beacon_ies->data,
4459 beacon_ies->len);
ef429dad
JB		 4460 u8 dtim_count = 0;
4461
c65dd147
EG		 4462 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4463 const struct ieee80211_tim_ie *tim;
4464 tim = (void *)(tim_ie + 2);
4465 ifmgd->dtim_period = tim->dtim_period;
ef429dad 4466 dtim_count = tim->dtim_count;
826262c3 4467 }
989c6505 4468 ifmgd->have_beacon = true;
66e67e41 4469 assoc_data->timeout = jiffies;
89afe614 4470 assoc_data->timeout_started = true;
ef429dad
JB		 4471
4472 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
4473 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4474 sdata->vif.bss_conf.sync_device_ts =
4475 bss->device_ts_beacon;
4476 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4477 }
c65dd147
EG		 4478 } else {
4479 assoc_data->timeout = jiffies;
89afe614 4480 assoc_data->timeout_started = true;
66e67e41 4481 }
c65dd147
EG		 4482 rcu_read_unlock();
4483
8d61ffa5 4484 run_again(sdata, assoc_data->timeout);
66e67e41 4485
fcff4f10
PS		 4486 if (bss->corrupt_data) {
4487 char *corrupt_type = "data";
4488 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4489 if (bss->corrupt_data &
4490 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4491 corrupt_type = "beacon and probe response";
4492 else
4493 corrupt_type = "beacon";
4494 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4495 corrupt_type = "probe response";
bdcbd8e0
JB		 4496 sdata_info(sdata, "associating with AP with corrupt %s\n",
4497 corrupt_type);
fcff4f10
PS		 4498 }
4499
8d61ffa5 4500 return 0;
66e67e41 4501 err_clear:
3d2abdfd
EP		 4502 memset(ifmgd->bssid, 0, ETH_ALEN);
4503 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 4504 ifmgd->assoc_data = NULL;
4505 err_free:
4506 kfree(assoc_data);
66e67e41 4507 return err;
f0706e82
JB		 4508}
4509
77fdaa12 4510int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
63c9c5e7 4511 struct cfg80211_deauth_request *req)
f0706e82 4512{
46900298 4513 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 4514 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
6863255b 4515 bool tx = !req->local_state_change;
f0706e82 4516
c9c3a060
JB		 4517 if (ifmgd->auth_data &&
4518 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
4519 sdata_info(sdata,
4520 "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
4521 req->bssid, req->reason_code,
4522 ieee80211_get_reason_code_string(req->reason_code));
0ff71613 4523
8c7d857c 4524 drv_mgd_prepare_tx(sdata->local, sdata);
37ad3888
JB		 4525 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4526 IEEE80211_STYPE_DEAUTH,
6863255b 4527 req->reason_code, tx,
37ad3888 4528 frame_buf);
86552017 4529 ieee80211_destroy_auth_data(sdata, false);
c9c3a060
JB		 4530 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4531 IEEE80211_DEAUTH_FRAME_LEN);
86552017 4532
c9c3a060 4533 return 0;
8c7d857c
EG		 4534 }
4535
86552017
JB		 4536 if (ifmgd->associated &&
4537 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
c9c3a060
JB		 4538 sdata_info(sdata,
4539 "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
4540 req->bssid, req->reason_code,
4541 ieee80211_get_reason_code_string(req->reason_code));
4542
86552017
JB		 4543 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4544 req->reason_code, tx, frame_buf);
6ff57cf8
JB		 4545 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4546 IEEE80211_DEAUTH_FRAME_LEN);
c9c3a060
JB		 4547 return 0;
4548 }
86552017 4549
c9c3a060 4550 return -ENOTCONN;
f0706e82 4551}
84363e6e 4552
77fdaa12 4553int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 4554 struct cfg80211_disassoc_request *req)
9c6bd790 4555{
77fdaa12 4556 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 4557 u8 bssid[ETH_ALEN];
6ae16775 4558 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
9c6bd790 4559
8d8b261a
JB		 4560 /*
4561 * cfg80211 should catch this ... but it's racy since
4562 * we can receive a disassoc frame, process it, hand it
4563 * to cfg80211 while that's in a locked section already
4564 * trying to tell us that the user wants to disconnect.
4565 */
8d61ffa5 4566 if (ifmgd->associated != req->bss)
77fdaa12 4567 return -ENOLINK;
77fdaa12 4568
bdcbd8e0 4569 sdata_info(sdata,
dfa1ad29
CO		 4570 "disassociating from %pM by local choice (Reason: %u=%s)\n",
4571 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
0ff71613 4572
e69e95db 4573 memcpy(bssid, req->bss->bssid, ETH_ALEN);
37ad3888
JB		 4574 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4575 req->reason_code, !req->local_state_change,
4576 frame_buf);
10f644a4 4577
6ff57cf8
JB		 4578 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4579 IEEE80211_DEAUTH_FRAME_LEN);
bc83b681 4580
10f644a4
JB		 4581 return 0;
4582}
026331c4 4583
afa762f6 4584void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
54e4ffb2
JB		 4585{
4586 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4587
49921859
BG		 4588 /*
4589 * Make sure some work items will not run after this,
4590 * they will not do anything but might not have been
4591 * cancelled when disconnecting.
4592 */
4593 cancel_work_sync(&ifmgd->monitor_work);
4594 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
4595 cancel_work_sync(&ifmgd->request_smps_work);
4596 cancel_work_sync(&ifmgd->csa_connection_drop_work);
4597 cancel_work_sync(&ifmgd->chswitch_work);
81dd2b88 4598 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
49921859 4599
8d61ffa5 4600 sdata_lock(sdata);
959867fa
JB		 4601 if (ifmgd->assoc_data) {
4602 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
54e4ffb2 4603 ieee80211_destroy_assoc_data(sdata, false);
959867fa
JB		 4604 cfg80211_assoc_timeout(sdata->dev, bss);
4605 }
54e4ffb2
JB		 4606 if (ifmgd->auth_data)
4607 ieee80211_destroy_auth_data(sdata, false);
4608 del_timer_sync(&ifmgd->timer);
8d61ffa5 4609 sdata_unlock(sdata);
54e4ffb2
JB		 4610}
4611
a97c13c3
JO		 4612void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
4613 enum nl80211_cqm_rssi_threshold_event rssi_event,
4614 gfp_t gfp)
4615{
4616 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4617
b5878a2d
JB		 4618 trace_api_cqm_rssi_notify(sdata, rssi_event);
4619
a97c13c3
JO		 4620 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
4621}
4622EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
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