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mac80211: add pre_channel_switch driver operation
[mirror_ubuntu-bionic-kernel.git] / net / mac80211 / mlme.c
CommitLineData
f0706e82
JB		 1/*
2 * BSS client mode implementation
5394af4d 3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
f0706e82
JB		 4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
d98ad83e 8 * Copyright 2013-2014 Intel Mobile Communications GmbH
f0706e82
JB		 9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
13 */
14
5b323edb 15#include <linux/delay.h>
f0706e82
JB		 16#include <linux/if_ether.h>
17#include <linux/skbuff.h>
f0706e82 18#include <linux/if_arp.h>
f0706e82 19#include <linux/etherdevice.h>
d9b93842 20#include <linux/moduleparam.h>
d0709a65 21#include <linux/rtnetlink.h>
e8db0be1 22#include <linux/pm_qos.h>
d91f36db 23#include <linux/crc32.h>
5a0e3ad6 24#include <linux/slab.h>
bc3b2d7f 25#include <linux/export.h>
f0706e82 26#include <net/mac80211.h>
472dbc45 27#include <asm/unaligned.h>
60f8b39c 28
f0706e82 29#include "ieee80211_i.h"
24487981 30#include "driver-ops.h"
2c8dccc7
JB		 31#include "rate.h"
32#include "led.h"
f0706e82 33
1672c0e3 34#define IEEE80211_AUTH_TIMEOUT (HZ / 5)
cb236d2d 35#define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2)
1672c0e3
JB		 36#define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10)
37#define IEEE80211_AUTH_MAX_TRIES 3
38#define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
39#define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
cb236d2d 40#define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2)
1672c0e3
JB		 41#define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10)
42#define IEEE80211_ASSOC_MAX_TRIES 3
66e67e41 43
180205bd
BG		 44static int max_nullfunc_tries = 2;
45module_param(max_nullfunc_tries, int, 0644);
46MODULE_PARM_DESC(max_nullfunc_tries,
47 "Maximum nullfunc tx tries before disconnecting (reason 4).");
48
49static int max_probe_tries = 5;
50module_param(max_probe_tries, int, 0644);
51MODULE_PARM_DESC(max_probe_tries,
52 "Maximum probe tries before disconnecting (reason 4).");
b291ba11
JB		 53
54/*
7ccc8bd7
FF		 55 * Beacon loss timeout is calculated as N frames times the
56 * advertised beacon interval. This may need to be somewhat
57 * higher than what hardware might detect to account for
58 * delays in the host processing frames. But since we also
59 * probe on beacon miss before declaring the connection lost
60 * default to what we want.
b291ba11 61 */
59c1ec2b
BG		 62static int beacon_loss_count = 7;
63module_param(beacon_loss_count, int, 0644);
64MODULE_PARM_DESC(beacon_loss_count,
65 "Number of beacon intervals before we decide beacon was lost.");
7ccc8bd7 66
b291ba11
JB		 67/*
68 * Time the connection can be idle before we probe
69 * it to see if we can still talk to the AP.
70 */
d1c5091f 71#define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
b291ba11
JB		 72/*
73 * Time we wait for a probe response after sending
74 * a probe request because of beacon loss or for
75 * checking the connection still works.
76 */
180205bd
BG		 77static int probe_wait_ms = 500;
78module_param(probe_wait_ms, int, 0644);
79MODULE_PARM_DESC(probe_wait_ms,
80 "Maximum time(ms) to wait for probe response"
81 " before disconnecting (reason 4).");
f0706e82 82
17e4ec14
JM		 83/*
84 * Weight given to the latest Beacon frame when calculating average signal
85 * strength for Beacon frames received in the current BSS. This must be
86 * between 1 and 15.
87 */
88#define IEEE80211_SIGNAL_AVE_WEIGHT 3
89
391a200a
JM		 90/*
91 * How many Beacon frames need to have been used in average signal strength
92 * before starting to indicate signal change events.
93 */
94#define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
95
ca386f31
JB		 96/*
97 * We can have multiple work items (and connection probing)
98 * scheduling this timer, but we need to take care to only
99 * reschedule it when it should fire _earlier_ than it was
100 * asked for before, or if it's not pending right now. This
101 * function ensures that. Note that it then is required to
102 * run this function for all timeouts after the first one
103 * has happened -- the work that runs from this timer will
104 * do that.
105 */
8d61ffa5
JB		 106static void run_again(struct ieee80211_sub_if_data *sdata,
107 unsigned long timeout)
ca386f31 108{
8d61ffa5 109 sdata_assert_lock(sdata);
ca386f31 110
8d61ffa5
JB		 111 if (!timer_pending(&sdata->u.mgd.timer) ||
112 time_before(timeout, sdata->u.mgd.timer.expires))
113 mod_timer(&sdata->u.mgd.timer, timeout);
ca386f31
JB		 114}
115
d3a910a8 116void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
b291ba11 117{
c1288b12 118 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
b291ba11
JB		 119 return;
120
7eeff74c
JB		 121 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
122 return;
123
b291ba11 124 mod_timer(&sdata->u.mgd.bcn_mon_timer,
7ccc8bd7 125 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
b291ba11
JB		 126}
127
be099e82
LR		 128void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
129{
0c699c3a
LR		 130 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
131
8628172f
SG		 132 if (unlikely(!sdata->u.mgd.associated))
133 return;
134
448cd2e2
EP		 135 ifmgd->probe_send_count = 0;
136
be099e82
LR		 137 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
138 return;
139
140 mod_timer(&sdata->u.mgd.conn_mon_timer,
141 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
142}
143
5484e237 144static int ecw2cw(int ecw)
60f8b39c 145{
5484e237 146 return (1 << ecw) - 1;
60f8b39c
JB		 147}
148
6565ec9b
JB		 149static u32
150ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
151 struct ieee80211_supported_band *sband,
152 struct ieee80211_channel *channel,
53b954ee 153 const struct ieee80211_ht_cap *ht_cap,
6565ec9b
JB		 154 const struct ieee80211_ht_operation *ht_oper,
155 const struct ieee80211_vht_operation *vht_oper,
5cdaed1e 156 struct cfg80211_chan_def *chandef, bool tracking)
6565ec9b 157{
5cdaed1e 158 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6565ec9b
JB		 159 struct cfg80211_chan_def vht_chandef;
160 u32 ht_cfreq, ret;
161
162 chandef->chan = channel;
163 chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
164 chandef->center_freq1 = channel->center_freq;
165 chandef->center_freq2 = 0;
166
53b954ee 167 if (!ht_cap || !ht_oper || !sband->ht_cap.ht_supported) {
6565ec9b
JB		 168 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
169 goto out;
170 }
171
172 chandef->width = NL80211_CHAN_WIDTH_20;
173
53b954ee
EP		 174 if (!(ht_cap->cap_info &
175 cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40))) {
f3000e1b 176 ret = IEEE80211_STA_DISABLE_40MHZ;
53b954ee
EP		 177 goto out;
178 }
179
6565ec9b
JB		 180 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
181 channel->band);
182 /* check that channel matches the right operating channel */
5cdaed1e 183 if (!tracking && channel->center_freq != ht_cfreq) {
6565ec9b
JB		 184 /*
185 * It's possible that some APs are confused here;
186 * Netgear WNDR3700 sometimes reports 4 higher than
187 * the actual channel in association responses, but
188 * since we look at probe response/beacon data here
189 * it should be OK.
190 */
5cdaed1e
JB		 191 sdata_info(sdata,
192 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
193 channel->center_freq, ht_cfreq,
194 ht_oper->primary_chan, channel->band);
6565ec9b
JB		 195 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
196 goto out;
197 }
198
199 /* check 40 MHz support, if we have it */
200 if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
201 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
202 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
203 chandef->width = NL80211_CHAN_WIDTH_40;
204 chandef->center_freq1 += 10;
205 break;
206 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
207 chandef->width = NL80211_CHAN_WIDTH_40;
208 chandef->center_freq1 -= 10;
209 break;
210 }
211 } else {
212 /* 40 MHz (and 80 MHz) must be supported for VHT */
213 ret = IEEE80211_STA_DISABLE_VHT;
85220d71
JB		 214 /* also mark 40 MHz disabled */
215 ret |= IEEE80211_STA_DISABLE_40MHZ;
6565ec9b
JB		 216 goto out;
217 }
218
219 if (!vht_oper || !sband->vht_cap.vht_supported) {
220 ret = IEEE80211_STA_DISABLE_VHT;
221 goto out;
222 }
223
224 vht_chandef.chan = channel;
225 vht_chandef.center_freq1 =
226 ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx,
227 channel->band);
228 vht_chandef.center_freq2 = 0;
229
6565ec9b
JB		 230 switch (vht_oper->chan_width) {
231 case IEEE80211_VHT_CHANWIDTH_USE_HT:
232 vht_chandef.width = chandef->width;
cb664981 233 vht_chandef.center_freq1 = chandef->center_freq1;
6565ec9b
JB		 234 break;
235 case IEEE80211_VHT_CHANWIDTH_80MHZ:
236 vht_chandef.width = NL80211_CHAN_WIDTH_80;
237 break;
238 case IEEE80211_VHT_CHANWIDTH_160MHZ:
239 vht_chandef.width = NL80211_CHAN_WIDTH_160;
240 break;
241 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
242 vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
6553bf04
JB		 243 vht_chandef.center_freq2 =
244 ieee80211_channel_to_frequency(
245 vht_oper->center_freq_seg2_idx,
246 channel->band);
6565ec9b
JB		 247 break;
248 default:
5cdaed1e 249 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
30eb1dc2
JB		 250 sdata_info(sdata,
251 "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
252 vht_oper->chan_width);
6565ec9b
JB		 253 ret = IEEE80211_STA_DISABLE_VHT;
254 goto out;
255 }
256
257 if (!cfg80211_chandef_valid(&vht_chandef)) {
5cdaed1e 258 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
30eb1dc2
JB		 259 sdata_info(sdata,
260 "AP VHT information is invalid, disable VHT\n");
6565ec9b
JB		 261 ret = IEEE80211_STA_DISABLE_VHT;
262 goto out;
263 }
264
265 if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
266 ret = 0;
267 goto out;
268 }
269
270 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
5cdaed1e 271 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
30eb1dc2
JB		 272 sdata_info(sdata,
273 "AP VHT information doesn't match HT, disable VHT\n");
6565ec9b
JB		 274 ret = IEEE80211_STA_DISABLE_VHT;
275 goto out;
276 }
277
278 *chandef = vht_chandef;
279
280 ret = 0;
281
282out:
963a1852
JB		 283 /*
284 * When tracking the current AP, don't do any further checks if the
285 * new chandef is identical to the one we're currently using for the
286 * connection. This keeps us from playing ping-pong with regulatory,
287 * without it the following can happen (for example):
288 * - connect to an AP with 80 MHz, world regdom allows 80 MHz
289 * - AP advertises regdom US
290 * - CRDA loads regdom US with 80 MHz prohibited (old database)
291 * - the code below detects an unsupported channel, downgrades, and
292 * we disconnect from the AP in the caller
293 * - disconnect causes CRDA to reload world regdomain and the game
294 * starts anew.
295 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
296 *
297 * It seems possible that there are still scenarios with CSA or real
298 * bandwidth changes where a this could happen, but those cases are
299 * less common and wouldn't completely prevent using the AP.
300 */
301 if (tracking &&
302 cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef))
303 return ret;
304
586e01ed
JB		 305 /* don't print the message below for VHT mismatch if VHT is disabled */
306 if (ret & IEEE80211_STA_DISABLE_VHT)
307 vht_chandef = *chandef;
308
ddfe49b4
JB		 309 /*
310 * Ignore the DISABLED flag when we're already connected and only
311 * tracking the APs beacon for bandwidth changes - otherwise we
312 * might get disconnected here if we connect to an AP, update our
313 * regulatory information based on the AP's country IE and the
314 * information we have is wrong/outdated and disables the channel
315 * that we're actually using for the connection to the AP.
316 */
6565ec9b 317 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
ddfe49b4
JB		 318 tracking ? 0 :
319 IEEE80211_CHAN_DISABLED)) {
6565ec9b
JB		 320 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
321 ret = IEEE80211_STA_DISABLE_HT |
322 IEEE80211_STA_DISABLE_VHT;
b56e4b85 323 break;
6565ec9b
JB		 324 }
325
e6b7cde4 326 ret |= ieee80211_chandef_downgrade(chandef);
6565ec9b
JB		 327 }
328
5cdaed1e 329 if (chandef->width != vht_chandef.width && !tracking)
6565ec9b
JB		 330 sdata_info(sdata,
331 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
332
333 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
334 return ret;
335}
336
30eb1dc2
JB		 337static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
338 struct sta_info *sta,
53b954ee 339 const struct ieee80211_ht_cap *ht_cap,
30eb1dc2
JB		 340 const struct ieee80211_ht_operation *ht_oper,
341 const struct ieee80211_vht_operation *vht_oper,
342 const u8 *bssid, u32 *changed)
d5522e03
JB		 343{
344 struct ieee80211_local *local = sdata->local;
30eb1dc2 345 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d5522e03 346 struct ieee80211_supported_band *sband;
55de908a 347 struct ieee80211_channel *chan;
30eb1dc2 348 struct cfg80211_chan_def chandef;
9ed6bcce 349 u16 ht_opmode;
30eb1dc2
JB		 350 u32 flags;
351 enum ieee80211_sta_rx_bandwidth new_sta_bw;
352 int ret;
d5522e03 353
30eb1dc2
JB		 354 /* if HT was/is disabled, don't track any bandwidth changes */
355 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
1128958d
JB		 356 return 0;
357
30eb1dc2
JB		 358 /* don't check VHT if we associated as non-VHT station */
359 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
360 vht_oper = NULL;
361
362 if (WARN_ON_ONCE(!sta))
363 return -EINVAL;
364
017b45bb
AA		 365 /*
366 * if bss configuration changed store the new one -
367 * this may be applicable even if channel is identical
368 */
369 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
370 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
371 *changed |= BSS_CHANGED_HT;
372 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
373 }
374
f2d9330e 375 chan = sdata->vif.bss_conf.chandef.chan;
55de908a 376 sband = local->hw.wiphy->bands[chan->band];
d5522e03 377
30eb1dc2 378 /* calculate new channel (type) based on HT/VHT operation IEs */
53b954ee
EP		 379 flags = ieee80211_determine_chantype(sdata, sband, chan,
380 ht_cap, ht_oper, vht_oper,
381 &chandef, true);
30eb1dc2
JB		 382
383 /*
384 * Downgrade the new channel if we associated with restricted
385 * capabilities. For example, if we associated as a 20 MHz STA
386 * to a 40 MHz AP (due to regulatory, capabilities or config
387 * reasons) then switching to a 40 MHz channel now won't do us
388 * any good -- we couldn't use it with the AP.
389 */
390 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
391 chandef.width == NL80211_CHAN_WIDTH_80P80)
e6b7cde4 392 flags |= ieee80211_chandef_downgrade(&chandef);
30eb1dc2
JB		 393 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
394 chandef.width == NL80211_CHAN_WIDTH_160)
e6b7cde4 395 flags |= ieee80211_chandef_downgrade(&chandef);
30eb1dc2
JB		 396 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
397 chandef.width > NL80211_CHAN_WIDTH_20)
e6b7cde4 398 flags |= ieee80211_chandef_downgrade(&chandef);
30eb1dc2
JB		 399
400 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
401 return 0;
402
403 sdata_info(sdata,
404 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
405 ifmgd->bssid, chandef.chan->center_freq, chandef.width,
406 chandef.center_freq1, chandef.center_freq2);
407
408 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
409 IEEE80211_STA_DISABLE_VHT |
410 IEEE80211_STA_DISABLE_40MHZ |
411 IEEE80211_STA_DISABLE_80P80MHZ |
412 IEEE80211_STA_DISABLE_160MHZ)) ||
413 !cfg80211_chandef_valid(&chandef)) {
414 sdata_info(sdata,
415 "AP %pM changed bandwidth in a way we can't support - disconnect\n",
416 ifmgd->bssid);
417 return -EINVAL;
418 }
419
420 switch (chandef.width) {
421 case NL80211_CHAN_WIDTH_20_NOHT:
422 case NL80211_CHAN_WIDTH_20:
423 new_sta_bw = IEEE80211_STA_RX_BW_20;
424 break;
4bf88530 425 case NL80211_CHAN_WIDTH_40:
30eb1dc2 426 new_sta_bw = IEEE80211_STA_RX_BW_40;
64f68e5d 427 break;
30eb1dc2
JB		 428 case NL80211_CHAN_WIDTH_80:
429 new_sta_bw = IEEE80211_STA_RX_BW_80;
430 break;
431 case NL80211_CHAN_WIDTH_80P80:
432 case NL80211_CHAN_WIDTH_160:
433 new_sta_bw = IEEE80211_STA_RX_BW_160;
64f68e5d 434 break;
30eb1dc2
JB		 435 default:
436 return -EINVAL;
64f68e5d 437 }
d5522e03 438
30eb1dc2
JB		 439 if (new_sta_bw > sta->cur_max_bandwidth)
440 new_sta_bw = sta->cur_max_bandwidth;
64f68e5d 441
30eb1dc2
JB		 442 if (new_sta_bw < sta->sta.bandwidth) {
443 sta->sta.bandwidth = new_sta_bw;
444 rate_control_rate_update(local, sband, sta,
445 IEEE80211_RC_BW_CHANGED);
446 }
64f68e5d 447
30eb1dc2
JB		 448 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
449 if (ret) {
450 sdata_info(sdata,
451 "AP %pM changed bandwidth to incompatible one - disconnect\n",
452 ifmgd->bssid);
453 return ret;
454 }
7cc44ed4 455
30eb1dc2
JB		 456 if (new_sta_bw > sta->sta.bandwidth) {
457 sta->sta.bandwidth = new_sta_bw;
458 rate_control_rate_update(local, sband, sta,
459 IEEE80211_RC_BW_CHANGED);
0aaffa9b 460 }
d5522e03 461
30eb1dc2 462 return 0;
d5522e03
JB		 463}
464
9c6bd790
JB		 465/* frame sending functions */
466
66e67e41 467static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
9dde6423 468 struct sk_buff *skb, u8 ap_ht_param,
66e67e41
JB		 469 struct ieee80211_supported_band *sband,
470 struct ieee80211_channel *channel,
471 enum ieee80211_smps_mode smps)
472{
66e67e41
JB		 473 u8 *pos;
474 u32 flags = channel->flags;
475 u16 cap;
476 struct ieee80211_sta_ht_cap ht_cap;
477
478 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
479
66e67e41
JB		 480 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
481 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
482
66e67e41
JB		 483 /* determine capability flags */
484 cap = ht_cap.cap;
485
9dde6423 486 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
66e67e41
JB		 487 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
488 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
489 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
490 cap &= ~IEEE80211_HT_CAP_SGI_40;
491 }
492 break;
493 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
494 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
495 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
496 cap &= ~IEEE80211_HT_CAP_SGI_40;
497 }
498 break;
499 }
500
24398e39
JB		 501 /*
502 * If 40 MHz was disabled associate as though we weren't
503 * capable of 40 MHz -- some broken APs will never fall
504 * back to trying to transmit in 20 MHz.
505 */
506 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
507 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
508 cap &= ~IEEE80211_HT_CAP_SGI_40;
509 }
510
66e67e41
JB		 511 /* set SM PS mode properly */
512 cap &= ~IEEE80211_HT_CAP_SM_PS;
513 switch (smps) {
514 case IEEE80211_SMPS_AUTOMATIC:
515 case IEEE80211_SMPS_NUM_MODES:
516 WARN_ON(1);
517 case IEEE80211_SMPS_OFF:
518 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
519 IEEE80211_HT_CAP_SM_PS_SHIFT;
520 break;
521 case IEEE80211_SMPS_STATIC:
522 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
523 IEEE80211_HT_CAP_SM_PS_SHIFT;
524 break;
525 case IEEE80211_SMPS_DYNAMIC:
526 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
527 IEEE80211_HT_CAP_SM_PS_SHIFT;
528 break;
529 }
530
531 /* reserve and fill IE */
532 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
533 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
534}
535
d545daba
MP		 536static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
537 struct sk_buff *skb,
b08fbbd8
JB		 538 struct ieee80211_supported_band *sband,
539 struct ieee80211_vht_cap *ap_vht_cap)
d545daba
MP		 540{
541 u8 *pos;
542 u32 cap;
543 struct ieee80211_sta_vht_cap vht_cap;
c1cf6d4e 544 u32 mask, ap_bf_sts, our_bf_sts;
d545daba
MP		 545
546 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
547
548 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
dd5ecfea 549 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
d545daba
MP		 550
551 /* determine capability flags */
552 cap = vht_cap.cap;
553
f2d9d270
JB		 554 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
555 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ;
556 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
557 }
558
559 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
560 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
561 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
562 }
563
b08fbbd8
JB		 564 /*
565 * Some APs apparently get confused if our capabilities are better
566 * than theirs, so restrict what we advertise in the assoc request.
567 */
568 if (!(ap_vht_cap->vht_cap_info &
569 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
570 cap &= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE;
571
c1cf6d4e
ES		 572 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK;
573
574 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask;
575 our_bf_sts = cap & mask;
576
577 if (ap_bf_sts < our_bf_sts) {
578 cap &= ~mask;
579 cap |= ap_bf_sts;
580 }
581
d545daba 582 /* reserve and fill IE */
d4950281 583 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
d545daba
MP		 584 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
585}
586
66e67e41
JB		 587static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
588{
589 struct ieee80211_local *local = sdata->local;
590 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
591 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
592 struct sk_buff *skb;
593 struct ieee80211_mgmt *mgmt;
594 u8 *pos, qos_info;
595 size_t offset = 0, noffset;
2103dec1 596 int i, count, rates_len, supp_rates_len, shift;
66e67e41
JB		 597 u16 capab;
598 struct ieee80211_supported_band *sband;
55de908a
JB		 599 struct ieee80211_chanctx_conf *chanctx_conf;
600 struct ieee80211_channel *chan;
2103dec1 601 u32 rate_flags, rates = 0;
66e67e41 602
8d61ffa5 603 sdata_assert_lock(sdata);
66e67e41 604
55de908a
JB		 605 rcu_read_lock();
606 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
607 if (WARN_ON(!chanctx_conf)) {
608 rcu_read_unlock();
609 return;
610 }
4bf88530 611 chan = chanctx_conf->def.chan;
2103dec1 612 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
55de908a
JB		 613 rcu_read_unlock();
614 sband = local->hw.wiphy->bands[chan->band];
2103dec1 615 shift = ieee80211_vif_get_shift(&sdata->vif);
66e67e41
JB		 616
617 if (assoc_data->supp_rates_len) {
618 /*
619 * Get all rates supported by the device and the AP as
620 * some APs don't like getting a superset of their rates
621 * in the association request (e.g. D-Link DAP 1353 in
622 * b-only mode)...
623 */
2103dec1
SW		 624 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
625 assoc_data->supp_rates,
626 assoc_data->supp_rates_len,
627 &rates);
66e67e41
JB		 628 } else {
629 /*
630 * In case AP not provide any supported rates information
631 * before association, we send information element(s) with
632 * all rates that we support.
633 */
2103dec1
SW		 634 rates_len = 0;
635 for (i = 0; i < sband->n_bitrates; i++) {
636 if ((rate_flags & sband->bitrates[i].flags)
637 != rate_flags)
638 continue;
639 rates |= BIT(i);
640 rates_len++;
641 }
66e67e41
JB		 642 }
643
644 skb = alloc_skb(local->hw.extra_tx_headroom +
645 sizeof(*mgmt) + /* bit too much but doesn't matter */
646 2 + assoc_data->ssid_len + /* SSID */
647 4 + rates_len + /* (extended) rates */
648 4 + /* power capability */
649 2 + 2 * sband->n_channels + /* supported channels */
650 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
d4950281 651 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
66e67e41
JB		 652 assoc_data->ie_len + /* extra IEs */
653 9, /* WMM */
654 GFP_KERNEL);
655 if (!skb)
656 return;
657
658 skb_reserve(skb, local->hw.extra_tx_headroom);
659
660 capab = WLAN_CAPABILITY_ESS;
661
662 if (sband->band == IEEE80211_BAND_2GHZ) {
663 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
664 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
665 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
666 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
667 }
668
669 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
670 capab |= WLAN_CAPABILITY_PRIVACY;
671
672 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
673 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
674 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
675
cd2f5dd7
AK		 676 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM)
677 capab |= WLAN_CAPABILITY_RADIO_MEASURE;
678
66e67e41
JB		 679 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
680 memset(mgmt, 0, 24);
681 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
682 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
683 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
684
685 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
686 skb_put(skb, 10);
687 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
688 IEEE80211_STYPE_REASSOC_REQ);
689 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
690 mgmt->u.reassoc_req.listen_interval =
691 cpu_to_le16(local->hw.conf.listen_interval);
692 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
693 ETH_ALEN);
694 } else {
695 skb_put(skb, 4);
696 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
697 IEEE80211_STYPE_ASSOC_REQ);
698 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
699 mgmt->u.assoc_req.listen_interval =
700 cpu_to_le16(local->hw.conf.listen_interval);
701 }
702
703 /* SSID */
704 pos = skb_put(skb, 2 + assoc_data->ssid_len);
705 *pos++ = WLAN_EID_SSID;
706 *pos++ = assoc_data->ssid_len;
707 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
708
709 /* add all rates which were marked to be used above */
710 supp_rates_len = rates_len;
711 if (supp_rates_len > 8)
712 supp_rates_len = 8;
713
714 pos = skb_put(skb, supp_rates_len + 2);
715 *pos++ = WLAN_EID_SUPP_RATES;
716 *pos++ = supp_rates_len;
717
718 count = 0;
719 for (i = 0; i < sband->n_bitrates; i++) {
720 if (BIT(i) & rates) {
2103dec1
SW		 721 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
722 5 * (1 << shift));
723 *pos++ = (u8) rate;
66e67e41
JB		 724 if (++count == 8)
725 break;
726 }
727 }
728
729 if (rates_len > count) {
730 pos = skb_put(skb, rates_len - count + 2);
731 *pos++ = WLAN_EID_EXT_SUPP_RATES;
732 *pos++ = rates_len - count;
733
734 for (i++; i < sband->n_bitrates; i++) {
735 if (BIT(i) & rates) {
2103dec1
SW		 736 int rate;
737 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
738 5 * (1 << shift));
739 *pos++ = (u8) rate;
66e67e41
JB		 740 }
741 }
742 }
743
cd2f5dd7
AK		 744 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT ||
745 capab & WLAN_CAPABILITY_RADIO_MEASURE) {
66e67e41
JB		 746 pos = skb_put(skb, 4);
747 *pos++ = WLAN_EID_PWR_CAPABILITY;
748 *pos++ = 2;
749 *pos++ = 0; /* min tx power */
0430c883
SW		 750 /* max tx power */
751 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
cd2f5dd7 752 }
66e67e41 753
cd2f5dd7 754 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
66e67e41
JB		 755 /* TODO: get this in reg domain format */
756 pos = skb_put(skb, 2 * sband->n_channels + 2);
757 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
758 *pos++ = 2 * sband->n_channels;
759 for (i = 0; i < sband->n_channels; i++) {
760 *pos++ = ieee80211_frequency_to_channel(
761 sband->channels[i].center_freq);
762 *pos++ = 1; /* one channel in the subband*/
763 }
764 }
765
766 /* if present, add any custom IEs that go before HT */
b3f51e94 767 if (assoc_data->ie_len) {
66e67e41
JB		 768 static const u8 before_ht[] = {
769 WLAN_EID_SSID,
770 WLAN_EID_SUPP_RATES,
771 WLAN_EID_EXT_SUPP_RATES,
772 WLAN_EID_PWR_CAPABILITY,
773 WLAN_EID_SUPPORTED_CHANNELS,
774 WLAN_EID_RSN,
775 WLAN_EID_QOS_CAPA,
776 WLAN_EID_RRM_ENABLED_CAPABILITIES,
777 WLAN_EID_MOBILITY_DOMAIN,
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,
2ba45384
LC		 1049 u64 timestamp, u32 device_timestamp,
1050 struct ieee802_11_elems *elems,
04a161f4 1051 bool beacon)
cc32abd4 1052{
b4f286a1 1053 struct ieee80211_local *local = sdata->local;
cc32abd4 1054 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
37799e52 1055 struct cfg80211_bss *cbss = ifmgd->associated;
4c3ebc56 1056 struct ieee80211_chanctx_conf *conf;
55de908a 1057 struct ieee80211_chanctx *chanctx;
e6b7cde4 1058 enum ieee80211_band current_band;
c0f17eb9 1059 struct ieee80211_csa_ie csa_ie;
6d027bcc 1060 struct ieee80211_channel_switch ch_switch;
e6b7cde4 1061 int res;
cc32abd4 1062
8d61ffa5 1063 sdata_assert_lock(sdata);
77fdaa12 1064
37799e52 1065 if (!cbss)
cc32abd4
JB		 1066 return;
1067
b4f286a1 1068 if (local->scanning)
cc32abd4
JB		 1069 return;
1070
37799e52 1071 /* disregard subsequent announcements if we are already processing */
3e2a0226 1072 if (sdata->vif.csa_active)
cc32abd4
JB		 1073 return;
1074
e6b7cde4 1075 current_band = cbss->channel->band;
c0f17eb9 1076 memset(&csa_ie, 0, sizeof(csa_ie));
e6b7cde4
SW		 1077 res = ieee80211_parse_ch_switch_ie(sdata, elems, beacon, current_band,
1078 ifmgd->flags,
c0f17eb9 1079 ifmgd->associated->bssid, &csa_ie);
e6b7cde4 1080 if (res < 0)
b4f286a1 1081 ieee80211_queue_work(&local->hw,
882a7c69 1082 &ifmgd->csa_connection_drop_work);
e6b7cde4 1083 if (res)
cc32abd4 1084 return;
cd64f2a9 1085
c0f17eb9 1086 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
85220d71
JB		 1087 IEEE80211_CHAN_DISABLED)) {
1088 sdata_info(sdata,
1089 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
e6b7cde4 1090 ifmgd->associated->bssid,
c0f17eb9
CYY		 1091 csa_ie.chandef.chan->center_freq,
1092 csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1093 csa_ie.chandef.center_freq2);
85220d71
JB		 1094 ieee80211_queue_work(&local->hw,
1095 &ifmgd->csa_connection_drop_work);
1096 return;
1097 }
1098
4c3ebc56 1099 mutex_lock(&local->mtx);
7578d575 1100 mutex_lock(&local->chanctx_mtx);
4c3ebc56
MK		 1101 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1102 lockdep_is_held(&local->chanctx_mtx));
1103 if (!conf) {
1104 sdata_info(sdata,
1105 "no channel context assigned to vif?, disconnecting\n");
1106 ieee80211_queue_work(&local->hw,
1107 &ifmgd->csa_connection_drop_work);
1108 mutex_unlock(&local->chanctx_mtx);
1109 mutex_unlock(&local->mtx);
1110 return;
1111 }
1112
1113 chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1114
b4f286a1 1115 if (local->use_chanctx) {
7578d575
AN		 1116 u32 num_chanctx = 0;
1117 list_for_each_entry(chanctx, &local->chanctx_list, list)
1118 num_chanctx++;
1119
1120 if (num_chanctx > 1 ||
1121 !(local->hw.flags & IEEE80211_HW_CHANCTX_STA_CSA)) {
1122 sdata_info(sdata,
1123 "not handling chan-switch with channel contexts\n");
1124 ieee80211_queue_work(&local->hw,
1125 &ifmgd->csa_connection_drop_work);
1126 mutex_unlock(&local->chanctx_mtx);
4c3ebc56 1127 mutex_unlock(&local->mtx);
7578d575
AN		 1128 return;
1129 }
55de908a
JB		 1130 }
1131
6d027bcc
LC		 1132 ch_switch.timestamp = timestamp;
1133 ch_switch.device_timestamp = device_timestamp;
1134 ch_switch.block_tx = csa_ie.mode;
1135 ch_switch.chandef = csa_ie.chandef;
1136 ch_switch.count = csa_ie.count;
1137
1138 if (drv_pre_channel_switch(sdata, &ch_switch)) {
1139 sdata_info(sdata,
1140 "preparing for channel switch failed, disconnecting\n");
1141 ieee80211_queue_work(&local->hw,
1142 &ifmgd->csa_connection_drop_work);
1143 mutex_unlock(&local->chanctx_mtx);
1144 mutex_unlock(&local->mtx);
1145 return;
1146 }
1147
4c3ebc56
MK		 1148 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1149 chanctx->mode, false);
1150 if (res) {
55de908a 1151 sdata_info(sdata,
4c3ebc56
MK		 1152 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1153 res);
b4f286a1 1154 ieee80211_queue_work(&local->hw,
55de908a 1155 &ifmgd->csa_connection_drop_work);
b4f286a1 1156 mutex_unlock(&local->chanctx_mtx);
4c3ebc56 1157 mutex_unlock(&local->mtx);
55de908a
JB		 1158 return;
1159 }
b4f286a1 1160 mutex_unlock(&local->chanctx_mtx);
55de908a 1161
c46a73f3 1162 sdata->vif.csa_active = true;
4c3ebc56 1163 sdata->csa_chandef = csa_ie.chandef;
59af6928 1164 sdata->csa_block_tx = csa_ie.mode;
55de908a 1165
59af6928 1166 if (sdata->csa_block_tx)
a46992b4
LC		 1167 ieee80211_stop_vif_queues(local, sdata,
1168 IEEE80211_QUEUE_STOP_REASON_CSA);
59af6928 1169 mutex_unlock(&local->mtx);
57eebdf3 1170
b4f286a1 1171 if (local->ops->channel_switch) {
5ce6e438 1172 /* use driver's channel switch callback */
b4f286a1 1173 drv_channel_switch(local, &ch_switch);
5ce6e438
JB		 1174 return;
1175 }
1176
1177 /* channel switch handled in software */
c0f17eb9 1178 if (csa_ie.count <= 1)
b4f286a1 1179 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
57eebdf3 1180 else
cc32abd4 1181 mod_timer(&ifmgd->chswitch_timer,
c0f17eb9 1182 TU_TO_EXP_TIME(csa_ie.count * cbss->beacon_interval));
cc32abd4
JB		 1183}
1184
24a4e400
SG		 1185static bool
1186ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1187 struct ieee80211_channel *channel,
1188 const u8 *country_ie, u8 country_ie_len,
1189 const u8 *pwr_constr_elem,
1190 int *chan_pwr, int *pwr_reduction)
cc32abd4 1191{
04b7b2ff
JB		 1192 struct ieee80211_country_ie_triplet *triplet;
1193 int chan = ieee80211_frequency_to_channel(channel->center_freq);
24a4e400 1194 int i, chan_increment;
04b7b2ff 1195 bool have_chan_pwr = false;
cc32abd4 1196
04b7b2ff
JB		 1197 /* Invalid IE */
1198 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
24a4e400 1199 return false;
cc32abd4 1200
04b7b2ff
JB		 1201 triplet = (void *)(country_ie + 3);
1202 country_ie_len -= 3;
1203
1204 switch (channel->band) {
1205 default:
1206 WARN_ON_ONCE(1);
1207 /* fall through */
1208 case IEEE80211_BAND_2GHZ:
1209 case IEEE80211_BAND_60GHZ:
1210 chan_increment = 1;
1211 break;
1212 case IEEE80211_BAND_5GHZ:
1213 chan_increment = 4;
1214 break;
cc32abd4 1215 }
04b7b2ff
JB		 1216
1217 /* find channel */
1218 while (country_ie_len >= 3) {
1219 u8 first_channel = triplet->chans.first_channel;
1220
1221 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1222 goto next;
1223
1224 for (i = 0; i < triplet->chans.num_channels; i++) {
1225 if (first_channel + i * chan_increment == chan) {
1226 have_chan_pwr = true;
24a4e400 1227 *chan_pwr = triplet->chans.max_power;
04b7b2ff
JB		 1228 break;
1229 }
1230 }
1231 if (have_chan_pwr)
1232 break;
1233
1234 next:
1235 triplet++;
1236 country_ie_len -= 3;
1237 }
1238
24a4e400
SG		 1239 if (have_chan_pwr)
1240 *pwr_reduction = *pwr_constr_elem;
1241 return have_chan_pwr;
1242}
1243
c8d65917
SG		 1244static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
1245 struct ieee80211_channel *channel,
1246 const u8 *cisco_dtpc_ie,
1247 int *pwr_level)
1248{
1249 /* From practical testing, the first data byte of the DTPC element
1250 * seems to contain the requested dBm level, and the CLI on Cisco
1251 * APs clearly state the range is -127 to 127 dBm, which indicates
1252 * a signed byte, although it seemingly never actually goes negative.
1253 * The other byte seems to always be zero.
1254 */
1255 *pwr_level = (__s8)cisco_dtpc_ie[4];
1256}
1257
24a4e400
SG		 1258static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1259 struct ieee80211_channel *channel,
1260 struct ieee80211_mgmt *mgmt,
1261 const u8 *country_ie, u8 country_ie_len,
c8d65917
SG		 1262 const u8 *pwr_constr_ie,
1263 const u8 *cisco_dtpc_ie)
24a4e400 1264{
c8d65917
SG		 1265 bool has_80211h_pwr = false, has_cisco_pwr = false;
1266 int chan_pwr = 0, pwr_reduction_80211h = 0;
1267 int pwr_level_cisco, pwr_level_80211h;
24a4e400 1268 int new_ap_level;
04b7b2ff 1269
24a4e400
SG		 1270 if (country_ie && pwr_constr_ie &&
1271 mgmt->u.probe_resp.capab_info &
1272 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT)) {
1273 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
1274 sdata, channel, country_ie, country_ie_len,
1275 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
c8d65917
SG		 1276 pwr_level_80211h =
1277 max_t(int, 0, chan_pwr - pwr_reduction_80211h);
1278 }
1279
1280 if (cisco_dtpc_ie) {
1281 ieee80211_find_cisco_dtpc(
1282 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
1283 has_cisco_pwr = true;
24a4e400 1284 }
04b7b2ff 1285
c8d65917 1286 if (!has_80211h_pwr && !has_cisco_pwr)
1ea6f9c0 1287 return 0;
04b7b2ff 1288
c8d65917
SG		 1289 /* If we have both 802.11h and Cisco DTPC, apply both limits
1290 * by picking the smallest of the two power levels advertised.
1291 */
1292 if (has_80211h_pwr &&
1293 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
1294 sdata_info(sdata,
1295 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1296 pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
1297 sdata->u.mgd.bssid);
1298 new_ap_level = pwr_level_80211h;
1299 } else { /* has_cisco_pwr is always true here. */
1300 sdata_info(sdata,
1301 "Limiting TX power to %d dBm as advertised by %pM\n",
1302 pwr_level_cisco, sdata->u.mgd.bssid);
1303 new_ap_level = pwr_level_cisco;
1304 }
04b7b2ff 1305
1ea6f9c0
JB		 1306 if (sdata->ap_power_level == new_ap_level)
1307 return 0;
04b7b2ff 1308
1ea6f9c0
JB		 1309 sdata->ap_power_level = new_ap_level;
1310 if (__ieee80211_recalc_txpower(sdata))
1311 return BSS_CHANGED_TXPOWER;
1312 return 0;
cc32abd4
JB		 1313}
1314
965bedad
JB		 1315/* powersave */
1316static void ieee80211_enable_ps(struct ieee80211_local *local,
1317 struct ieee80211_sub_if_data *sdata)
1318{
1319 struct ieee80211_conf *conf = &local->hw.conf;
1320
d5edaedc
JB		 1321 /*
1322 * If we are scanning right now then the parameters will
1323 * take effect when scan finishes.
1324 */
fbe9c429 1325 if (local->scanning)
d5edaedc
JB		 1326 return;
1327
965bedad
JB		 1328 if (conf->dynamic_ps_timeout > 0 &&
1329 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
1330 mod_timer(&local->dynamic_ps_timer, jiffies +
1331 msecs_to_jiffies(conf->dynamic_ps_timeout));
1332 } else {
1333 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1334 ieee80211_send_nullfunc(local, sdata, 1);
375177bf 1335
2a13052f
JO		 1336 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1337 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
1338 return;
1339
1340 conf->flags |= IEEE80211_CONF_PS;
1341 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965bedad
JB		 1342 }
1343}
1344
1345static void ieee80211_change_ps(struct ieee80211_local *local)
1346{
1347 struct ieee80211_conf *conf = &local->hw.conf;
1348
1349 if (local->ps_sdata) {
965bedad
JB		 1350 ieee80211_enable_ps(local, local->ps_sdata);
1351 } else if (conf->flags & IEEE80211_CONF_PS) {
1352 conf->flags &= ~IEEE80211_CONF_PS;
1353 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1354 del_timer_sync(&local->dynamic_ps_timer);
1355 cancel_work_sync(&local->dynamic_ps_enable_work);
1356 }
1357}
1358
808118cb
JY		 1359static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1360{
1361 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1362 struct sta_info *sta = NULL;
c2c98fde 1363 bool authorized = false;
808118cb
JY		 1364
1365 if (!mgd->powersave)
1366 return false;
1367
05cb9108
JB		 1368 if (mgd->broken_ap)
1369 return false;
1370
808118cb
JY		 1371 if (!mgd->associated)
1372 return false;
1373
392b9ffb 1374 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
808118cb
JY		 1375 return false;
1376
989c6505 1377 if (!mgd->have_beacon)
ce857888
AB		 1378 return false;
1379
808118cb
JY		 1380 rcu_read_lock();
1381 sta = sta_info_get(sdata, mgd->bssid);
1382 if (sta)
c2c98fde 1383 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
808118cb
JY		 1384 rcu_read_unlock();
1385
c2c98fde 1386 return authorized;
808118cb
JY		 1387}
1388
965bedad 1389/* need to hold RTNL or interface lock */
10f644a4 1390void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 1391{
1392 struct ieee80211_sub_if_data *sdata, *found = NULL;
1393 int count = 0;
195e294d 1394 int timeout;
965bedad
JB		 1395
1396 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
1397 local->ps_sdata = NULL;
1398 return;
1399 }
1400
1401 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 1402 if (!ieee80211_sdata_running(sdata))
965bedad 1403 continue;
8c7914de
RM		 1404 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1405 /* If an AP vif is found, then disable PS
1406 * by setting the count to zero thereby setting
1407 * ps_sdata to NULL.
1408 */
1409 count = 0;
1410 break;
1411 }
965bedad
JB		 1412 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1413 continue;
1414 found = sdata;
1415 count++;
1416 }
1417
808118cb 1418 if (count == 1 && ieee80211_powersave_allowed(found)) {
10f644a4
JB		 1419 s32 beaconint_us;
1420
1421 if (latency < 0)
ed77134b 1422 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
10f644a4
JB		 1423
1424 beaconint_us = ieee80211_tu_to_usec(
1425 found->vif.bss_conf.beacon_int);
1426
ff616381 1427 timeout = local->dynamic_ps_forced_timeout;
195e294d
JO		 1428 if (timeout < 0) {
1429 /*
ff616381
JO		 1430 * Go to full PSM if the user configures a very low
1431 * latency requirement.
0ab82b04
EP		 1432 * The 2000 second value is there for compatibility
1433 * until the PM_QOS_NETWORK_LATENCY is configured
1434 * with real values.
195e294d 1435 */
0ab82b04
EP		 1436 if (latency > (1900 * USEC_PER_MSEC) &&
1437 latency != (2000 * USEC_PER_SEC))
195e294d 1438 timeout = 0;
ff616381
JO		 1439 else
1440 timeout = 100;
195e294d 1441 }
09b85568 1442 local->hw.conf.dynamic_ps_timeout = timeout;
195e294d 1443
04fe2037 1444 if (beaconint_us > latency) {
10f644a4 1445 local->ps_sdata = NULL;
04fe2037 1446 } else {
04fe2037 1447 int maxslp = 1;
826262c3 1448 u8 dtimper = found->u.mgd.dtim_period;
56007a02
JB		 1449
1450 /* If the TIM IE is invalid, pretend the value is 1 */
1451 if (!dtimper)
1452 dtimper = 1;
1453 else if (dtimper > 1)
04fe2037
JB		 1454 maxslp = min_t(int, dtimper,
1455 latency / beaconint_us);
1456
9ccebe61 1457 local->hw.conf.max_sleep_period = maxslp;
56007a02 1458 local->hw.conf.ps_dtim_period = dtimper;
10f644a4 1459 local->ps_sdata = found;
04fe2037 1460 }
10f644a4 1461 } else {
965bedad 1462 local->ps_sdata = NULL;
10f644a4 1463 }
965bedad
JB		 1464
1465 ieee80211_change_ps(local);
1466}
1467
ab095877
EP		 1468void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1469{
1470 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1471
1472 if (sdata->vif.bss_conf.ps != ps_allowed) {
1473 sdata->vif.bss_conf.ps = ps_allowed;
1474 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1475 }
1476}
1477
965bedad
JB		 1478void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1479{
1480 struct ieee80211_local *local =
1481 container_of(work, struct ieee80211_local,
1482 dynamic_ps_disable_work);
1483
1484 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1485 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1486 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1487 }
1488
1489 ieee80211_wake_queues_by_reason(&local->hw,
445ea4e8 1490 IEEE80211_MAX_QUEUE_MAP,
cca07b00
LC		 1491 IEEE80211_QUEUE_STOP_REASON_PS,
1492 false);
965bedad
JB		 1493}
1494
1495void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1496{
1497 struct ieee80211_local *local =
1498 container_of(work, struct ieee80211_local,
1499 dynamic_ps_enable_work);
1500 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
5e34069c 1501 struct ieee80211_if_managed *ifmgd;
1ddc2867
RM		 1502 unsigned long flags;
1503 int q;
965bedad
JB		 1504
1505 /* can only happen when PS was just disabled anyway */
1506 if (!sdata)
1507 return;
1508
5e34069c
CL		 1509 ifmgd = &sdata->u.mgd;
1510
965bedad
JB		 1511 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1512 return;
1513
09b85568 1514 if (local->hw.conf.dynamic_ps_timeout > 0) {
77b7023a
AN		 1515 /* don't enter PS if TX frames are pending */
1516 if (drv_tx_frames_pending(local)) {
1ddc2867
RM		 1517 mod_timer(&local->dynamic_ps_timer, jiffies +
1518 msecs_to_jiffies(
1519 local->hw.conf.dynamic_ps_timeout));
1520 return;
1521 }
77b7023a
AN		 1522
1523 /*
1524 * transmission can be stopped by others which leads to
1525 * dynamic_ps_timer expiry. Postpone the ps timer if it
1526 * is not the actual idle state.
1527 */
1528 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1529 for (q = 0; q < local->hw.queues; q++) {
1530 if (local->queue_stop_reasons[q]) {
1531 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1532 flags);
1533 mod_timer(&local->dynamic_ps_timer, jiffies +
1534 msecs_to_jiffies(
1535 local->hw.conf.dynamic_ps_timeout));
1536 return;
1537 }
1538 }
1539 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1ddc2867 1540 }
1ddc2867 1541
375177bf 1542 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
9c38a8b4 1543 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
a1598383 1544 if (drv_tx_frames_pending(local)) {
e8306f98
VN		 1545 mod_timer(&local->dynamic_ps_timer, jiffies +
1546 msecs_to_jiffies(
1547 local->hw.conf.dynamic_ps_timeout));
a1598383 1548 } else {
e8306f98
VN		 1549 ieee80211_send_nullfunc(local, sdata, 1);
1550 /* Flush to get the tx status of nullfunc frame */
39ecc01d 1551 ieee80211_flush_queues(local, sdata);
e8306f98 1552 }
f3e85b9e
VN		 1553 }
1554
2a13052f
JO		 1555 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1556 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
375177bf
VN		 1557 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1558 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1559 local->hw.conf.flags |= IEEE80211_CONF_PS;
1560 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1561 }
965bedad
JB		 1562}
1563
1564void ieee80211_dynamic_ps_timer(unsigned long data)
1565{
1566 struct ieee80211_local *local = (void *) data;
1567
78f1a8b7 1568 if (local->quiescing || local->suspended)
5bb644a0
JB		 1569 return;
1570
42935eca 1571 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 1572}
1573
164eb02d
SW		 1574void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1575{
1576 struct delayed_work *delayed_work =
1577 container_of(work, struct delayed_work, work);
1578 struct ieee80211_sub_if_data *sdata =
1579 container_of(delayed_work, struct ieee80211_sub_if_data,
1580 dfs_cac_timer_work);
d2859df5 1581 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
164eb02d 1582
34a3740d
JB		 1583 mutex_lock(&sdata->local->mtx);
1584 if (sdata->wdev.cac_started) {
1585 ieee80211_vif_release_channel(sdata);
1586 cfg80211_cac_event(sdata->dev, &chandef,
1587 NL80211_RADAR_CAC_FINISHED,
1588 GFP_KERNEL);
1589 }
1590 mutex_unlock(&sdata->local->mtx);
164eb02d
SW		 1591}
1592
60f8b39c 1593/* MLME */
7d25745d 1594static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
4ced3f74 1595 struct ieee80211_sub_if_data *sdata,
4a3cb702 1596 const u8 *wmm_param, size_t wmm_param_len)
f0706e82 1597{
f0706e82 1598 struct ieee80211_tx_queue_params params;
4ced3f74 1599 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1600 size_t left;
1601 int count;
4a3cb702
JB		 1602 const u8 *pos;
1603 u8 uapsd_queues = 0;
f0706e82 1604
e1b3ec1a 1605 if (!local->ops->conf_tx)
7d25745d 1606 return false;
e1b3ec1a 1607
32c5057b 1608 if (local->hw.queues < IEEE80211_NUM_ACS)
7d25745d 1609 return false;
3434fbd3
JB		 1610
1611 if (!wmm_param)
7d25745d 1612 return false;
3434fbd3 1613
f0706e82 1614 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
7d25745d 1615 return false;
ab13315a
KV		 1616
1617 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
dc41e4d4 1618 uapsd_queues = ifmgd->uapsd_queues;
ab13315a 1619
f0706e82 1620 count = wmm_param[6] & 0x0f;
46900298 1621 if (count == ifmgd->wmm_last_param_set)
7d25745d 1622 return false;
46900298 1623 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 1624
1625 pos = wmm_param + 8;
1626 left = wmm_param_len - 8;
1627
1628 memset(&params, 0, sizeof(params));
1629
00e96dec 1630 sdata->wmm_acm = 0;
f0706e82
JB		 1631 for (; left >= 4; left -= 4, pos += 4) {
1632 int aci = (pos[0] >> 5) & 0x03;
1633 int acm = (pos[0] >> 4) & 0x01;
ab13315a 1634 bool uapsd = false;
f0706e82
JB		 1635 int queue;
1636
1637 switch (aci) {
0eeb59fe 1638 case 1: /* AC_BK */
e100bb64 1639 queue = 3;
988c0f72 1640 if (acm)
00e96dec 1641 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV		 1642 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1643 uapsd = true;
f0706e82 1644 break;
0eeb59fe 1645 case 2: /* AC_VI */
e100bb64 1646 queue = 1;
988c0f72 1647 if (acm)
00e96dec 1648 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV		 1649 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1650 uapsd = true;
f0706e82 1651 break;
0eeb59fe 1652 case 3: /* AC_VO */
e100bb64 1653 queue = 0;
988c0f72 1654 if (acm)
00e96dec 1655 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV		 1656 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1657 uapsd = true;
f0706e82 1658 break;
0eeb59fe 1659 case 0: /* AC_BE */
f0706e82 1660 default:
e100bb64 1661 queue = 2;
988c0f72 1662 if (acm)
00e96dec 1663 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV		 1664 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1665 uapsd = true;
f0706e82
JB		 1666 break;
1667 }
1668
1669 params.aifs = pos[0] & 0x0f;
1670 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1671 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 1672 params.txop = get_unaligned_le16(pos + 2);
908f8d07 1673 params.acm = acm;
ab13315a
KV		 1674 params.uapsd = uapsd;
1675
bdcbd8e0
JB		 1676 mlme_dbg(sdata,
1677 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1678 queue, aci, acm,
1679 params.aifs, params.cw_min, params.cw_max,
1680 params.txop, params.uapsd);
f6f3def3
EP		 1681 sdata->tx_conf[queue] = params;
1682 if (drv_conf_tx(local, sdata, queue, &params))
bdcbd8e0
JB		 1683 sdata_err(sdata,
1684 "failed to set TX queue parameters for queue %d\n",
1685 queue);
f0706e82 1686 }
e1b3ec1a
SG		 1687
1688 /* enable WMM or activate new settings */
4ced3f74 1689 sdata->vif.bss_conf.qos = true;
7d25745d 1690 return true;
f0706e82
JB		 1691}
1692
925e64c3
SG		 1693static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1694{
1695 lockdep_assert_held(&sdata->local->mtx);
1696
392b9ffb 1697 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
925e64c3
SG		 1698 ieee80211_run_deferred_scan(sdata->local);
1699}
1700
1701static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1702{
1703 mutex_lock(&sdata->local->mtx);
1704 __ieee80211_stop_poll(sdata);
1705 mutex_unlock(&sdata->local->mtx);
1706}
1707
7a5158ef
JB		 1708static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1709 u16 capab, bool erp_valid, u8 erp)
5628221c 1710{
bda3933a 1711 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 1712 u32 changed = 0;
7a5158ef
JB		 1713 bool use_protection;
1714 bool use_short_preamble;
1715 bool use_short_slot;
1716
1717 if (erp_valid) {
1718 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1719 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1720 } else {
1721 use_protection = false;
1722 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1723 }
1724
1725 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
55de908a 1726 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
43d35343 1727 use_short_slot = true;
5628221c 1728
471b3efd 1729 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 1730 bss_conf->use_cts_prot = use_protection;
1731 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 1732 }
7e9ed188 1733
d43c7b37 1734 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 1735 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 1736 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 1737 }
d9430a32 1738
7a5158ef 1739 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 1740 bss_conf->use_short_slot = use_short_slot;
1741 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 1742 }
1743
1744 return changed;
1745}
1746
f698d856 1747static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 1748 struct cfg80211_bss *cbss,
ae5eb026 1749 u32 bss_info_changed)
f0706e82 1750{
0c1ad2ca 1751 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 1752 struct ieee80211_local *local = sdata->local;
68542962 1753 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
d6f2da5b 1754
ae5eb026 1755 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 1756 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
50ae34a2 1757 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 1758
7ccc8bd7 1759 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
59c1ec2b 1760 beacon_loss_count * bss_conf->beacon_int));
7ccc8bd7 1761
0c1ad2ca
JB		 1762 sdata->u.mgd.associated = cbss;
1763 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 1764
17e4ec14
JM		 1765 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1766
488dd7b5 1767 if (sdata->vif.p2p) {
9caf0364 1768 const struct cfg80211_bss_ies *ies;
488dd7b5 1769
9caf0364
JB		 1770 rcu_read_lock();
1771 ies = rcu_dereference(cbss->ies);
1772 if (ies) {
9caf0364
JB		 1773 int ret;
1774
1775 ret = cfg80211_get_p2p_attr(
1776 ies->data, ies->len,
1777 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
67baf663
JD		 1778 (u8 *) &bss_conf->p2p_noa_attr,
1779 sizeof(bss_conf->p2p_noa_attr));
9caf0364 1780 if (ret >= 2) {
67baf663
JD		 1781 sdata->u.mgd.p2p_noa_index =
1782 bss_conf->p2p_noa_attr.index;
9caf0364 1783 bss_info_changed |= BSS_CHANGED_P2P_PS;
9caf0364 1784 }
488dd7b5 1785 }
9caf0364 1786 rcu_read_unlock();
488dd7b5
JB		 1787 }
1788
b291ba11 1789 /* just to be sure */
925e64c3 1790 ieee80211_stop_poll(sdata);
b291ba11 1791
9ac19a90 1792 ieee80211_led_assoc(local, 1);
9306102e 1793
989c6505 1794 if (sdata->u.mgd.have_beacon) {
826262c3
JB		 1795 /*
1796 * If the AP is buggy we may get here with no DTIM period
1797 * known, so assume it's 1 which is the only safe assumption
1798 * in that case, although if the TIM IE is broken powersave
1799 * probably just won't work at all.
1800 */
1801 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
817cee76 1802 bss_conf->beacon_rate = bss->beacon_rate;
989c6505 1803 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
826262c3 1804 } else {
817cee76 1805 bss_conf->beacon_rate = NULL;
e5b900d2 1806 bss_conf->dtim_period = 0;
826262c3 1807 }
e5b900d2 1808
68542962 1809 bss_conf->assoc = 1;
9cef8737 1810
a97c13c3 1811 /* Tell the driver to monitor connection quality (if supported) */
ea086359 1812 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
68542962 1813 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 1814 bss_info_changed |= BSS_CHANGED_CQM;
1815
68542962 1816 /* Enable ARP filtering */
0f19b41e 1817 if (bss_conf->arp_addr_cnt)
68542962 1818 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
68542962 1819
ae5eb026 1820 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 1821
056508dc
JB		 1822 mutex_lock(&local->iflist_mtx);
1823 ieee80211_recalc_ps(local, -1);
1824 mutex_unlock(&local->iflist_mtx);
e0cb686f 1825
04ecd257 1826 ieee80211_recalc_smps(sdata);
ab095877
EP		 1827 ieee80211_recalc_ps_vif(sdata);
1828
9ac19a90 1829 netif_carrier_on(sdata->dev);
f0706e82
JB		 1830}
1831
e69e95db 1832static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
37ad3888
JB		 1833 u16 stype, u16 reason, bool tx,
1834 u8 *frame_buf)
aa458d17 1835{
46900298 1836 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17 1837 struct ieee80211_local *local = sdata->local;
3cc5240b 1838 u32 changed = 0;
aa458d17 1839
8d61ffa5 1840 sdata_assert_lock(sdata);
77fdaa12 1841
37ad3888
JB		 1842 if (WARN_ON_ONCE(tx && !frame_buf))
1843 return;
1844
b291ba11
JB		 1845 if (WARN_ON(!ifmgd->associated))
1846 return;
1847
79543d8e
DS		 1848 ieee80211_stop_poll(sdata);
1849
77fdaa12 1850 ifmgd->associated = NULL;
aa458d17
TW		 1851 netif_carrier_off(sdata->dev);
1852
88bc40e8
EP		 1853 /*
1854 * if we want to get out of ps before disassoc (why?) we have
1855 * to do it before sending disassoc, as otherwise the null-packet
1856 * won't be valid.
1857 */
1858 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1859 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1860 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1861 }
1862 local->ps_sdata = NULL;
1863
ab095877
EP		 1864 /* disable per-vif ps */
1865 ieee80211_recalc_ps_vif(sdata);
1866
f823981e
EP		 1867 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1868 if (tx)
39ecc01d 1869 ieee80211_flush_queues(local, sdata);
f823981e 1870
37ad3888
JB		 1871 /* deauthenticate/disassociate now */
1872 if (tx || frame_buf)
88a9e31c
EP		 1873 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
1874 reason, tx, frame_buf);
37ad3888
JB		 1875
1876 /* flush out frame */
1877 if (tx)
39ecc01d 1878 ieee80211_flush_queues(local, sdata);
37ad3888 1879
88a9e31c
EP		 1880 /* clear bssid only after building the needed mgmt frames */
1881 memset(ifmgd->bssid, 0, ETH_ALEN);
1882
37ad3888 1883 /* remove AP and TDLS peers */
d34ba216 1884 sta_info_flush(sdata);
37ad3888
JB		 1885
1886 /* finally reset all BSS / config parameters */
f5e5bf25
TW		 1887 changed |= ieee80211_reset_erp_info(sdata);
1888
f5e5bf25 1889 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 1890 changed |= BSS_CHANGED_ASSOC;
1891 sdata->vif.bss_conf.assoc = false;
f5e5bf25 1892
67baf663
JD		 1893 ifmgd->p2p_noa_index = -1;
1894 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
1895 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
488dd7b5 1896
dd5ecfea 1897 /* on the next assoc, re-program HT/VHT parameters */
ef96a842
BG		 1898 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1899 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
dd5ecfea
JB		 1900 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
1901 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
413ad50a 1902
1ea6f9c0 1903 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
a8302de9 1904
520eb820
KV		 1905 del_timer_sync(&local->dynamic_ps_timer);
1906 cancel_work_sync(&local->dynamic_ps_enable_work);
1907
68542962 1908 /* Disable ARP filtering */
0f19b41e 1909 if (sdata->vif.bss_conf.arp_addr_cnt)
68542962 1910 changed |= BSS_CHANGED_ARP_FILTER;
68542962 1911
3abead59
JB		 1912 sdata->vif.bss_conf.qos = false;
1913 changed |= BSS_CHANGED_QOS;
1914
0aaffa9b
JB		 1915 /* The BSSID (not really interesting) and HT changed */
1916 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 1917 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 1918
3abead59
JB		 1919 /* disassociated - set to defaults now */
1920 ieee80211_set_wmm_default(sdata, false);
1921
b9dcf712
JB		 1922 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1923 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1924 del_timer_sync(&sdata->u.mgd.timer);
1925 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2d9957cc 1926
826262c3 1927 sdata->vif.bss_conf.dtim_period = 0;
817cee76
AB		 1928 sdata->vif.bss_conf.beacon_rate = NULL;
1929
989c6505 1930 ifmgd->have_beacon = false;
826262c3 1931
028e8da0 1932 ifmgd->flags = 0;
34a3740d 1933 mutex_lock(&local->mtx);
028e8da0 1934 ieee80211_vif_release_channel(sdata);
59af6928
MK		 1935
1936 sdata->vif.csa_active = false;
a46992b4
LC		 1937 if (sdata->csa_block_tx) {
1938 ieee80211_wake_vif_queues(local, sdata,
1939 IEEE80211_QUEUE_STOP_REASON_CSA);
1940 sdata->csa_block_tx = false;
1941 }
34a3740d 1942 mutex_unlock(&local->mtx);
2475b1cc
MS		 1943
1944 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
aa458d17 1945}
f0706e82 1946
3cf335d5
KV		 1947void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1948 struct ieee80211_hdr *hdr)
1949{
1950 /*
1951 * We can postpone the mgd.timer whenever receiving unicast frames
1952 * from AP because we know that the connection is working both ways
1953 * at that time. But multicast frames (and hence also beacons) must
1954 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 1955 * data idle periods for sending the periodic probe request to the
1956 * AP we're connected to.
3cf335d5 1957 */
b291ba11
JB		 1958 if (is_multicast_ether_addr(hdr->addr1))
1959 return;
1960
be099e82 1961 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 1962}
f0706e82 1963
4e5ff376
FF		 1964static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1965{
1966 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
133d40f9 1967 struct ieee80211_local *local = sdata->local;
4e5ff376 1968
133d40f9 1969 mutex_lock(&local->mtx);
392b9ffb
SG		 1970 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
1971 goto out;
4e5ff376 1972
925e64c3 1973 __ieee80211_stop_poll(sdata);
133d40f9
SG		 1974
1975 mutex_lock(&local->iflist_mtx);
1976 ieee80211_recalc_ps(local, -1);
1977 mutex_unlock(&local->iflist_mtx);
4e5ff376
FF		 1978
1979 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
133d40f9 1980 goto out;
4e5ff376
FF		 1981
1982 /*
1983 * We've received a probe response, but are not sure whether
1984 * we have or will be receiving any beacons or data, so let's
1985 * schedule the timers again, just in case.
1986 */
1987 ieee80211_sta_reset_beacon_monitor(sdata);
1988
1989 mod_timer(&ifmgd->conn_mon_timer,
1990 round_jiffies_up(jiffies +
1991 IEEE80211_CONNECTION_IDLE_TIME));
133d40f9 1992out:
133d40f9 1993 mutex_unlock(&local->mtx);
4e5ff376
FF		 1994}
1995
1996void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
04ac3c0e 1997 struct ieee80211_hdr *hdr, bool ack)
4e5ff376 1998{
75706d0e 1999 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF		 2000 return;
2001
4e5ff376
FF		 2002 if (ieee80211_is_nullfunc(hdr->frame_control) &&
2003 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e 2004 if (ack)
cab1c7fd 2005 ieee80211_sta_reset_conn_monitor(sdata);
04ac3c0e
FF		 2006 else
2007 sdata->u.mgd.nullfunc_failed = true;
4e5ff376 2008 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
cab1c7fd 2009 return;
4e5ff376 2010 }
cab1c7fd
WD		 2011
2012 if (ack)
2013 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF		 2014}
2015
a43abf29
ML		 2016static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2017{
2018 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2019 const u8 *ssid;
f01a067d 2020 u8 *dst = ifmgd->associated->bssid;
180205bd 2021 u8 unicast_limit = max(1, max_probe_tries - 3);
f01a067d
LR		 2022
2023 /*
2024 * Try sending broadcast probe requests for the last three
2025 * probe requests after the first ones failed since some
2026 * buggy APs only support broadcast probe requests.
2027 */
2028 if (ifmgd->probe_send_count >= unicast_limit)
2029 dst = NULL;
a43abf29 2030
4e5ff376
FF		 2031 /*
2032 * When the hardware reports an accurate Tx ACK status, it's
2033 * better to send a nullfunc frame instead of a probe request,
2034 * as it will kick us off the AP quickly if we aren't associated
2035 * anymore. The timeout will be reset if the frame is ACKed by
2036 * the AP.
2037 */
992e68bf
SD		 2038 ifmgd->probe_send_count++;
2039
04ac3c0e
FF		 2040 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2041 ifmgd->nullfunc_failed = false;
4e5ff376 2042 ieee80211_send_nullfunc(sdata->local, sdata, 0);
04ac3c0e 2043 } else {
88c868c4
SG		 2044 int ssid_len;
2045
9caf0364 2046 rcu_read_lock();
4e5ff376 2047 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
88c868c4
SG		 2048 if (WARN_ON_ONCE(ssid == NULL))
2049 ssid_len = 0;
2050 else
2051 ssid_len = ssid[1];
2052
2053 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
1672c0e3 2054 0, (u32) -1, true, 0,
55de908a 2055 ifmgd->associated->channel, false);
9caf0364 2056 rcu_read_unlock();
4e5ff376 2057 }
a43abf29 2058
180205bd 2059 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
8d61ffa5 2060 run_again(sdata, ifmgd->probe_timeout);
f69b9c79 2061 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
39ecc01d 2062 ieee80211_flush_queues(sdata->local, sdata);
a43abf29
ML		 2063}
2064
b291ba11
JB		 2065static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2066 bool beacon)
04de8381 2067{
04de8381 2068 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 2069 bool already = false;
34bfc411 2070
9607e6b6 2071 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 2072 return;
2073
8d61ffa5 2074 sdata_lock(sdata);
77fdaa12
JB		 2075
2076 if (!ifmgd->associated)
2077 goto out;
2078
133d40f9
SG		 2079 mutex_lock(&sdata->local->mtx);
2080
2081 if (sdata->local->tmp_channel || sdata->local->scanning) {
2082 mutex_unlock(&sdata->local->mtx);
2083 goto out;
2084 }
2085
a13fbe54 2086 if (beacon) {
bdcbd8e0 2087 mlme_dbg_ratelimited(sdata,
59c1ec2b
BG		 2088 "detected beacon loss from AP (missed %d beacons) - probing\n",
2089 beacon_loss_count);
bdcbd8e0 2090
a13fbe54
BG		 2091 ieee80211_cqm_rssi_notify(&sdata->vif,
2092 NL80211_CQM_RSSI_BEACON_LOSS_EVENT,
2093 GFP_KERNEL);
2094 }
04de8381 2095
b291ba11
JB		 2096 /*
2097 * The driver/our work has already reported this event or the
2098 * connection monitoring has kicked in and we have already sent
2099 * a probe request. Or maybe the AP died and the driver keeps
2100 * reporting until we disassociate...
2101 *
2102 * In either case we have to ignore the current call to this
2103 * function (except for setting the correct probe reason bit)
2104 * because otherwise we would reset the timer every time and
2105 * never check whether we received a probe response!
2106 */
392b9ffb 2107 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
b291ba11
JB		 2108 already = true;
2109
12b5f34d
EP		 2110 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2111
133d40f9
SG		 2112 mutex_unlock(&sdata->local->mtx);
2113
b291ba11
JB		 2114 if (already)
2115 goto out;
2116
4e751843
JB		 2117 mutex_lock(&sdata->local->iflist_mtx);
2118 ieee80211_recalc_ps(sdata->local, -1);
2119 mutex_unlock(&sdata->local->iflist_mtx);
2120
a43abf29
ML		 2121 ifmgd->probe_send_count = 0;
2122 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12 2123 out:
8d61ffa5 2124 sdata_unlock(sdata);
04de8381
KV		 2125}
2126
a619a4c0
JO		 2127struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2128 struct ieee80211_vif *vif)
2129{
2130 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2131 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d9b3b28b 2132 struct cfg80211_bss *cbss;
a619a4c0
JO		 2133 struct sk_buff *skb;
2134 const u8 *ssid;
88c868c4 2135 int ssid_len;
a619a4c0
JO		 2136
2137 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2138 return NULL;
2139
8d61ffa5 2140 sdata_assert_lock(sdata);
a619a4c0 2141
d9b3b28b
EP		 2142 if (ifmgd->associated)
2143 cbss = ifmgd->associated;
2144 else if (ifmgd->auth_data)
2145 cbss = ifmgd->auth_data->bss;
2146 else if (ifmgd->assoc_data)
2147 cbss = ifmgd->assoc_data->bss;
2148 else
a619a4c0
JO		 2149 return NULL;
2150
9caf0364 2151 rcu_read_lock();
d9b3b28b 2152 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
88c868c4
SG		 2153 if (WARN_ON_ONCE(ssid == NULL))
2154 ssid_len = 0;
2155 else
2156 ssid_len = ssid[1];
2157
d9b3b28b 2158 skb = ieee80211_build_probe_req(sdata, cbss->bssid,
55de908a 2159 (u32) -1, cbss->channel,
6b77863b 2160 ssid + 2, ssid_len,
85a237fe 2161 NULL, 0, true);
9caf0364 2162 rcu_read_unlock();
a619a4c0
JO		 2163
2164 return skb;
2165}
2166EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2167
eef9e54c 2168static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
1e4dcd01 2169{
59af6928 2170 struct ieee80211_local *local = sdata->local;
1e4dcd01 2171 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 2172 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
1e4dcd01 2173
8d61ffa5 2174 sdata_lock(sdata);
1e4dcd01 2175 if (!ifmgd->associated) {
8d61ffa5 2176 sdata_unlock(sdata);
1e4dcd01
JO		 2177 return;
2178 }
2179
37ad3888
JB		 2180 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2181 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
eef9e54c 2182 true, frame_buf);
59af6928 2183 mutex_lock(&local->mtx);
7578d575 2184 sdata->vif.csa_active = false;
a46992b4
LC		 2185 if (sdata->csa_block_tx) {
2186 ieee80211_wake_vif_queues(local, sdata,
2187 IEEE80211_QUEUE_STOP_REASON_CSA);
2188 sdata->csa_block_tx = false;
2189 }
59af6928 2190 mutex_unlock(&local->mtx);
7da7cc1d 2191
6ff57cf8
JB		 2192 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
2193 IEEE80211_DEAUTH_FRAME_LEN);
8d61ffa5 2194 sdata_unlock(sdata);
1e4dcd01
JO		 2195}
2196
cc74c0c7 2197static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 2198{
2199 struct ieee80211_sub_if_data *sdata =
2200 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 2201 u.mgd.beacon_connection_loss_work);
a85e1d55
PS		 2202 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2203 struct sta_info *sta;
2204
2205 if (ifmgd->associated) {
30fa9047 2206 rcu_read_lock();
a85e1d55
PS		 2207 sta = sta_info_get(sdata, ifmgd->bssid);
2208 if (sta)
2209 sta->beacon_loss_count++;
30fa9047 2210 rcu_read_unlock();
a85e1d55 2211 }
b291ba11 2212
682bd38b 2213 if (ifmgd->connection_loss) {
882a7c69
JB		 2214 sdata_info(sdata, "Connection to AP %pM lost\n",
2215 ifmgd->bssid);
eef9e54c 2216 __ieee80211_disconnect(sdata);
882a7c69 2217 } else {
1e4dcd01 2218 ieee80211_mgd_probe_ap(sdata, true);
882a7c69
JB		 2219 }
2220}
2221
2222static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2223{
2224 struct ieee80211_sub_if_data *sdata =
2225 container_of(work, struct ieee80211_sub_if_data,
2226 u.mgd.csa_connection_drop_work);
2227
eef9e54c 2228 __ieee80211_disconnect(sdata);
b291ba11
JB		 2229}
2230
04de8381
KV		 2231void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2232{
2233 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 2234 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 2235
b5878a2d
JB		 2236 trace_api_beacon_loss(sdata);
2237
682bd38b 2238 sdata->u.mgd.connection_loss = false;
1e4dcd01 2239 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 2240}
2241EXPORT_SYMBOL(ieee80211_beacon_loss);
2242
1e4dcd01
JO		 2243void ieee80211_connection_loss(struct ieee80211_vif *vif)
2244{
2245 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2246 struct ieee80211_hw *hw = &sdata->local->hw;
2247
b5878a2d
JB		 2248 trace_api_connection_loss(sdata);
2249
682bd38b 2250 sdata->u.mgd.connection_loss = true;
1e4dcd01
JO		 2251 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2252}
2253EXPORT_SYMBOL(ieee80211_connection_loss);
2254
2255
66e67e41
JB		 2256static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2257 bool assoc)
2258{
2259 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2260
8d61ffa5 2261 sdata_assert_lock(sdata);
66e67e41 2262
66e67e41
JB		 2263 if (!assoc) {
2264 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2265
2266 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2267 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
028e8da0 2268 sdata->u.mgd.flags = 0;
34a3740d 2269 mutex_lock(&sdata->local->mtx);
55de908a 2270 ieee80211_vif_release_channel(sdata);
34a3740d 2271 mutex_unlock(&sdata->local->mtx);
66e67e41
JB		 2272 }
2273
5b112d3d 2274 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
66e67e41
JB		 2275 kfree(auth_data);
2276 sdata->u.mgd.auth_data = NULL;
2277}
2278
2279static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2280 struct ieee80211_mgmt *mgmt, size_t len)
2281{
1672c0e3 2282 struct ieee80211_local *local = sdata->local;
66e67e41
JB		 2283 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2284 u8 *pos;
2285 struct ieee802_11_elems elems;
1672c0e3 2286 u32 tx_flags = 0;
66e67e41
JB		 2287
2288 pos = mgmt->u.auth.variable;
b2e506bf 2289 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
66e67e41
JB		 2290 if (!elems.challenge)
2291 return;
2292 auth_data->expected_transaction = 4;
a1845fc7 2293 drv_mgd_prepare_tx(sdata->local, sdata);
1672c0e3
JB		 2294 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2295 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2296 IEEE80211_TX_INTFL_MLME_CONN_TX;
700e8ea6 2297 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
66e67e41
JB		 2298 elems.challenge - 2, elems.challenge_len + 2,
2299 auth_data->bss->bssid, auth_data->bss->bssid,
2300 auth_data->key, auth_data->key_len,
1672c0e3 2301 auth_data->key_idx, tx_flags);
66e67e41
JB		 2302}
2303
8d61ffa5
JB		 2304static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2305 struct ieee80211_mgmt *mgmt, size_t len)
66e67e41
JB		 2306{
2307 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2308 u8 bssid[ETH_ALEN];
2309 u16 auth_alg, auth_transaction, status_code;
2310 struct sta_info *sta;
2311
8d61ffa5 2312 sdata_assert_lock(sdata);
66e67e41
JB		 2313
2314 if (len < 24 + 6)
8d61ffa5 2315 return;
66e67e41
JB		 2316
2317 if (!ifmgd->auth_data || ifmgd->auth_data->done)
8d61ffa5 2318 return;
66e67e41
JB		 2319
2320 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2321
b203ca39 2322 if (!ether_addr_equal(bssid, mgmt->bssid))
8d61ffa5 2323 return;
66e67e41
JB		 2324
2325 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2326 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2327 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2328
2329 if (auth_alg != ifmgd->auth_data->algorithm ||
0f4126e8
JM		 2330 auth_transaction != ifmgd->auth_data->expected_transaction) {
2331 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2332 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2333 auth_transaction,
2334 ifmgd->auth_data->expected_transaction);
8d61ffa5 2335 return;
0f4126e8 2336 }
66e67e41
JB		 2337
2338 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2339 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2340 mgmt->sa, status_code);
dac211ec 2341 ieee80211_destroy_auth_data(sdata, false);
6ff57cf8 2342 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
8d61ffa5 2343 return;
66e67e41
JB		 2344 }
2345
2346 switch (ifmgd->auth_data->algorithm) {
2347 case WLAN_AUTH_OPEN:
2348 case WLAN_AUTH_LEAP:
2349 case WLAN_AUTH_FT:
6b8ece3a 2350 case WLAN_AUTH_SAE:
66e67e41
JB		 2351 break;
2352 case WLAN_AUTH_SHARED_KEY:
2353 if (ifmgd->auth_data->expected_transaction != 4) {
2354 ieee80211_auth_challenge(sdata, mgmt, len);
2355 /* need another frame */
8d61ffa5 2356 return;
66e67e41
JB		 2357 }
2358 break;
2359 default:
2360 WARN_ONCE(1, "invalid auth alg %d",
2361 ifmgd->auth_data->algorithm);
8d61ffa5 2362 return;
66e67e41
JB		 2363 }
2364
bdcbd8e0 2365 sdata_info(sdata, "authenticated\n");
66e67e41
JB		 2366 ifmgd->auth_data->done = true;
2367 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
89afe614 2368 ifmgd->auth_data->timeout_started = true;
8d61ffa5 2369 run_again(sdata, ifmgd->auth_data->timeout);
66e67e41 2370
6b8ece3a
JM		 2371 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2372 ifmgd->auth_data->expected_transaction != 2) {
2373 /*
2374 * Report auth frame to user space for processing since another
2375 * round of Authentication frames is still needed.
2376 */
6ff57cf8 2377 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
8d61ffa5 2378 return;
6b8ece3a
JM		 2379 }
2380
66e67e41
JB		 2381 /* move station state to auth */
2382 mutex_lock(&sdata->local->sta_mtx);
2383 sta = sta_info_get(sdata, bssid);
2384 if (!sta) {
2385 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2386 goto out_err;
2387 }
2388 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
bdcbd8e0 2389 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
66e67e41
JB		 2390 goto out_err;
2391 }
2392 mutex_unlock(&sdata->local->sta_mtx);
2393
6ff57cf8 2394 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
8d61ffa5 2395 return;
66e67e41
JB		 2396 out_err:
2397 mutex_unlock(&sdata->local->sta_mtx);
2398 /* ignore frame -- wait for timeout */
66e67e41
JB		 2399}
2400
dfa1ad29
CO		 2401#define case_WLAN(type) \
2402 case WLAN_REASON_##type: return #type
2403
2404static const char *ieee80211_get_reason_code_string(u16 reason_code)
2405{
2406 switch (reason_code) {
2407 case_WLAN(UNSPECIFIED);
2408 case_WLAN(PREV_AUTH_NOT_VALID);
2409 case_WLAN(DEAUTH_LEAVING);
2410 case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2411 case_WLAN(DISASSOC_AP_BUSY);
2412 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2413 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2414 case_WLAN(DISASSOC_STA_HAS_LEFT);
2415 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2416 case_WLAN(DISASSOC_BAD_POWER);
2417 case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2418 case_WLAN(INVALID_IE);
2419 case_WLAN(MIC_FAILURE);
2420 case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2421 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2422 case_WLAN(IE_DIFFERENT);
2423 case_WLAN(INVALID_GROUP_CIPHER);
2424 case_WLAN(INVALID_PAIRWISE_CIPHER);
2425 case_WLAN(INVALID_AKMP);
2426 case_WLAN(UNSUPP_RSN_VERSION);
2427 case_WLAN(INVALID_RSN_IE_CAP);
2428 case_WLAN(IEEE8021X_FAILED);
2429 case_WLAN(CIPHER_SUITE_REJECTED);
2430 case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2431 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2432 case_WLAN(DISASSOC_LOW_ACK);
2433 case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2434 case_WLAN(QSTA_LEAVE_QBSS);
2435 case_WLAN(QSTA_NOT_USE);
2436 case_WLAN(QSTA_REQUIRE_SETUP);
2437 case_WLAN(QSTA_TIMEOUT);
2438 case_WLAN(QSTA_CIPHER_NOT_SUPP);
2439 case_WLAN(MESH_PEER_CANCELED);
2440 case_WLAN(MESH_MAX_PEERS);
2441 case_WLAN(MESH_CONFIG);
2442 case_WLAN(MESH_CLOSE);
2443 case_WLAN(MESH_MAX_RETRIES);
2444 case_WLAN(MESH_CONFIRM_TIMEOUT);
2445 case_WLAN(MESH_INVALID_GTK);
2446 case_WLAN(MESH_INCONSISTENT_PARAM);
2447 case_WLAN(MESH_INVALID_SECURITY);
2448 case_WLAN(MESH_PATH_ERROR);
2449 case_WLAN(MESH_PATH_NOFORWARD);
2450 case_WLAN(MESH_PATH_DEST_UNREACHABLE);
2451 case_WLAN(MAC_EXISTS_IN_MBSS);
2452 case_WLAN(MESH_CHAN_REGULATORY);
2453 case_WLAN(MESH_CHAN);
2454 default: return "<unknown>";
2455 }
2456}
66e67e41 2457
8d61ffa5
JB		 2458static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2459 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2460{
46900298 2461 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 2462 const u8 *bssid = NULL;
f0706e82
JB		 2463 u16 reason_code;
2464
8d61ffa5 2465 sdata_assert_lock(sdata);
66e67e41 2466
f4ea83dd 2467 if (len < 24 + 2)
8d61ffa5 2468 return;
f0706e82 2469
66e67e41 2470 if (!ifmgd->associated ||
b203ca39 2471 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
8d61ffa5 2472 return;
77fdaa12 2473
0c1ad2ca 2474 bssid = ifmgd->associated->bssid;
f0706e82
JB		 2475
2476 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2477
dfa1ad29
CO		 2478 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
2479 bssid, reason_code, ieee80211_get_reason_code_string(reason_code));
77fdaa12 2480
37ad3888
JB		 2481 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2482
6ff57cf8 2483 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
f0706e82
JB		 2484}
2485
2486
8d61ffa5
JB		 2487static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2488 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2489{
46900298 2490 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 2491 u16 reason_code;
2492
8d61ffa5 2493 sdata_assert_lock(sdata);
77fdaa12 2494
66e67e41 2495 if (len < 24 + 2)
8d61ffa5 2496 return;
77fdaa12 2497
66e67e41 2498 if (!ifmgd->associated ||
b203ca39 2499 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
8d61ffa5 2500 return;
f0706e82
JB		 2501
2502 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2503
bdcbd8e0
JB		 2504 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2505 mgmt->sa, reason_code);
f0706e82 2506
37ad3888
JB		 2507 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2508
6ff57cf8 2509 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
f0706e82
JB		 2510}
2511
c74d084f
CL		 2512static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2513 u8 *supp_rates, unsigned int supp_rates_len,
2514 u32 *rates, u32 *basic_rates,
2515 bool *have_higher_than_11mbit,
2103dec1
SW		 2516 int *min_rate, int *min_rate_index,
2517 int shift, u32 rate_flags)
c74d084f
CL		 2518{
2519 int i, j;
2520
2521 for (i = 0; i < supp_rates_len; i++) {
2103dec1 2522 int rate = supp_rates[i] & 0x7f;
c74d084f
CL		 2523 bool is_basic = !!(supp_rates[i] & 0x80);
2524
2103dec1 2525 if ((rate * 5 * (1 << shift)) > 110)
c74d084f
CL		 2526 *have_higher_than_11mbit = true;
2527
2528 /*
2529 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2530 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2531 *
2532 * Note: Even through the membership selector and the basic
2533 * rate flag share the same bit, they are not exactly
2534 * the same.
2535 */
2536 if (!!(supp_rates[i] & 0x80) &&
2537 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2538 continue;
2539
2540 for (j = 0; j < sband->n_bitrates; j++) {
2103dec1
SW		 2541 struct ieee80211_rate *br;
2542 int brate;
2543
2544 br = &sband->bitrates[j];
2545 if ((rate_flags & br->flags) != rate_flags)
2546 continue;
2547
2548 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2549 if (brate == rate) {
c74d084f
CL		 2550 *rates |= BIT(j);
2551 if (is_basic)
2552 *basic_rates |= BIT(j);
2103dec1
SW		 2553 if ((rate * 5) < *min_rate) {
2554 *min_rate = rate * 5;
c74d084f
CL		 2555 *min_rate_index = j;
2556 }
2557 break;
2558 }
2559 }
2560 }
2561}
f0706e82 2562
66e67e41
JB		 2563static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2564 bool assoc)
2565{
2566 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2567
8d61ffa5 2568 sdata_assert_lock(sdata);
66e67e41 2569
66e67e41
JB		 2570 if (!assoc) {
2571 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2572
2573 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2574 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
028e8da0 2575 sdata->u.mgd.flags = 0;
34a3740d 2576 mutex_lock(&sdata->local->mtx);
55de908a 2577 ieee80211_vif_release_channel(sdata);
34a3740d 2578 mutex_unlock(&sdata->local->mtx);
66e67e41
JB		 2579 }
2580
2581 kfree(assoc_data);
2582 sdata->u.mgd.assoc_data = NULL;
2583}
2584
2585static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2586 struct cfg80211_bss *cbss,
af6b6374 2587 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2588{
46900298 2589 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 2590 struct ieee80211_local *local = sdata->local;
8318d78a 2591 struct ieee80211_supported_band *sband;
f0706e82 2592 struct sta_info *sta;
af6b6374 2593 u8 *pos;
af6b6374 2594 u16 capab_info, aid;
f0706e82 2595 struct ieee802_11_elems elems;
bda3933a 2596 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
35d865af
JB		 2597 const struct cfg80211_bss_ies *bss_ies = NULL;
2598 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
ae5eb026 2599 u32 changed = 0;
c74d084f 2600 int err;
35d865af 2601 bool ret;
f0706e82 2602
af6b6374 2603 /* AssocResp and ReassocResp have identical structure */
f0706e82 2604
f0706e82 2605 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 2606 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 2607
1dd84aa2 2608 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
bdcbd8e0
JB		 2609 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2610 aid);
1dd84aa2
JB		 2611 aid &= ~(BIT(15) | BIT(14));
2612
05cb9108
JB		 2613 ifmgd->broken_ap = false;
2614
2615 if (aid == 0 || aid > IEEE80211_MAX_AID) {
bdcbd8e0
JB		 2616 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2617 aid);
05cb9108
JB		 2618 aid = 0;
2619 ifmgd->broken_ap = true;
2620 }
2621
af6b6374 2622 pos = mgmt->u.assoc_resp.variable;
b2e506bf 2623 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
af6b6374 2624
f0706e82 2625 if (!elems.supp_rates) {
bdcbd8e0 2626 sdata_info(sdata, "no SuppRates element in AssocResp\n");
af6b6374 2627 return false;
f0706e82
JB		 2628 }
2629
46900298 2630 ifmgd->aid = aid;
f0706e82 2631
35d865af
JB		 2632 /*
2633 * Some APs are erroneously not including some information in their
2634 * (re)association response frames. Try to recover by using the data
2635 * from the beacon or probe response. This seems to afflict mobile
2636 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2637 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2638 */
2639 if ((assoc_data->wmm && !elems.wmm_param) ||
2640 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2641 (!elems.ht_cap_elem || !elems.ht_operation)) ||
2642 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2643 (!elems.vht_cap_elem || !elems.vht_operation))) {
2644 const struct cfg80211_bss_ies *ies;
2645 struct ieee802_11_elems bss_elems;
2646
2647 rcu_read_lock();
2648 ies = rcu_dereference(cbss->ies);
2649 if (ies)
2650 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2651 GFP_ATOMIC);
2652 rcu_read_unlock();
2653 if (!bss_ies)
2654 return false;
2655
2656 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2657 false, &bss_elems);
2658 if (assoc_data->wmm &&
2659 !elems.wmm_param && bss_elems.wmm_param) {
2660 elems.wmm_param = bss_elems.wmm_param;
2661 sdata_info(sdata,
2662 "AP bug: WMM param missing from AssocResp\n");
2663 }
2664
2665 /*
2666 * Also check if we requested HT/VHT, otherwise the AP doesn't
2667 * have to include the IEs in the (re)association response.
2668 */
2669 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2670 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2671 elems.ht_cap_elem = bss_elems.ht_cap_elem;
2672 sdata_info(sdata,
2673 "AP bug: HT capability missing from AssocResp\n");
2674 }
2675 if (!elems.ht_operation && bss_elems.ht_operation &&
2676 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2677 elems.ht_operation = bss_elems.ht_operation;
2678 sdata_info(sdata,
2679 "AP bug: HT operation missing from AssocResp\n");
2680 }
2681 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2682 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2683 elems.vht_cap_elem = bss_elems.vht_cap_elem;
2684 sdata_info(sdata,
2685 "AP bug: VHT capa missing from AssocResp\n");
2686 }
2687 if (!elems.vht_operation && bss_elems.vht_operation &&
2688 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2689 elems.vht_operation = bss_elems.vht_operation;
2690 sdata_info(sdata,
2691 "AP bug: VHT operation missing from AssocResp\n");
2692 }
2693 }
2694
30eb1dc2
JB		 2695 /*
2696 * We previously checked these in the beacon/probe response, so
2697 * they should be present here. This is just a safety net.
2698 */
2699 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2700 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2701 sdata_info(sdata,
35d865af
JB		 2702 "HT AP is missing WMM params or HT capability/operation\n");
2703 ret = false;
2704 goto out;
30eb1dc2
JB		 2705 }
2706
2707 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2708 (!elems.vht_cap_elem || !elems.vht_operation)) {
2709 sdata_info(sdata,
35d865af
JB		 2710 "VHT AP is missing VHT capability/operation\n");
2711 ret = false;
2712 goto out;
30eb1dc2
JB		 2713 }
2714
2a33bee2
GE		 2715 mutex_lock(&sdata->local->sta_mtx);
2716 /*
2717 * station info was already allocated and inserted before
2718 * the association and should be available to us
2719 */
7852e361 2720 sta = sta_info_get(sdata, cbss->bssid);
2a33bee2
GE		 2721 if (WARN_ON(!sta)) {
2722 mutex_unlock(&sdata->local->sta_mtx);
35d865af
JB		 2723 ret = false;
2724 goto out;
77fdaa12 2725 }
05e5e883 2726
55de908a 2727 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
f709fc69 2728
30eb1dc2 2729 /* Set up internal HT/VHT capabilities */
a8243b72 2730 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
ef96a842 2731 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
e1a0c6b3 2732 elems.ht_cap_elem, sta);
64f68e5d 2733
818255ea
MP		 2734 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2735 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
4a34215e 2736 elems.vht_cap_elem, sta);
818255ea 2737
30eb1dc2
JB		 2738 /*
2739 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
2740 * in their association response, so ignore that data for our own
2741 * configuration. If it changed since the last beacon, we'll get the
2742 * next beacon and update then.
2743 */
1128958d 2744
bee7f586
JB		 2745 /*
2746 * If an operating mode notification IE is present, override the
2747 * NSS calculation (that would be done in rate_control_rate_init())
2748 * and use the # of streams from that element.
2749 */
2750 if (elems.opmode_notif &&
2751 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
2752 u8 nss;
2753
2754 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
2755 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
2756 nss += 1;
2757 sta->sta.rx_nss = nss;
2758 }
2759
4b7679a5 2760 rate_control_rate_init(sta);
f0706e82 2761
46900298 2762 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
c2c98fde 2763 set_sta_flag(sta, WLAN_STA_MFP);
5394af4d 2764
a74a8c84 2765 sta->sta.wme = elems.wmm_param;
ddf4ac53 2766
3e4d40fa 2767 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
c8987876
JB		 2768 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2769 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2770 if (err) {
bdcbd8e0
JB		 2771 sdata_info(sdata,
2772 "failed to move station %pM to desired state\n",
2773 sta->sta.addr);
c8987876
JB		 2774 WARN_ON(__sta_info_destroy(sta));
2775 mutex_unlock(&sdata->local->sta_mtx);
35d865af
JB		 2776 ret = false;
2777 goto out;
c8987876
JB		 2778 }
2779
7852e361 2780 mutex_unlock(&sdata->local->sta_mtx);
ddf4ac53 2781
f2176d72
JO		 2782 /*
2783 * Always handle WMM once after association regardless
2784 * of the first value the AP uses. Setting -1 here has
2785 * that effect because the AP values is an unsigned
2786 * 4-bit value.
2787 */
2788 ifmgd->wmm_last_param_set = -1;
2789
095d81ce 2790 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && elems.wmm_param)
4ced3f74 2791 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 2792 elems.wmm_param_len);
aa837e1d 2793 else
3abead59
JB		 2794 ieee80211_set_wmm_default(sdata, false);
2795 changed |= BSS_CHANGED_QOS;
f0706e82 2796
60f8b39c
JB		 2797 /* set AID and assoc capability,
2798 * ieee80211_set_associated() will tell the driver */
2799 bss_conf->aid = aid;
2800 bss_conf->assoc_capability = capab_info;
0c1ad2ca 2801 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 2802
d524215f
FF		 2803 /*
2804 * If we're using 4-addr mode, let the AP know that we're
2805 * doing so, so that it can create the STA VLAN on its side
2806 */
2807 if (ifmgd->use_4addr)
2808 ieee80211_send_4addr_nullfunc(local, sdata);
2809
15b7b062 2810 /*
b291ba11
JB		 2811 * Start timer to probe the connection to the AP now.
2812 * Also start the timer that will detect beacon loss.
15b7b062 2813 */
b291ba11 2814 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 2815 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 2816
35d865af
JB		 2817 ret = true;
2818 out:
2819 kfree(bss_ies);
2820 return ret;
f0706e82
JB		 2821}
2822
8d61ffa5
JB		 2823static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2824 struct ieee80211_mgmt *mgmt,
2825 size_t len)
66e67e41
JB		 2826{
2827 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2828 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2829 u16 capab_info, status_code, aid;
2830 struct ieee802_11_elems elems;
b0b6aa2c 2831 int ac, uapsd_queues = -1;
66e67e41
JB		 2832 u8 *pos;
2833 bool reassoc;
8d61ffa5 2834 struct cfg80211_bss *bss;
66e67e41 2835
8d61ffa5 2836 sdata_assert_lock(sdata);
66e67e41
JB		 2837
2838 if (!assoc_data)
8d61ffa5 2839 return;
b203ca39 2840 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
8d61ffa5 2841 return;
66e67e41
JB		 2842
2843 /*
2844 * AssocResp and ReassocResp have identical structure, so process both
2845 * of them in this function.
2846 */
2847
2848 if (len < 24 + 6)
8d61ffa5 2849 return;
66e67e41
JB		 2850
2851 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2852 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2853 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2854 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2855
bdcbd8e0
JB		 2856 sdata_info(sdata,
2857 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2858 reassoc ? "Rea" : "A", mgmt->sa,
2859 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
66e67e41
JB		 2860
2861 pos = mgmt->u.assoc_resp.variable;
b2e506bf 2862 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
66e67e41
JB		 2863
2864 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
79ba1d89
JB		 2865 elems.timeout_int &&
2866 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
66e67e41 2867 u32 tu, ms;
79ba1d89 2868 tu = le32_to_cpu(elems.timeout_int->value);
66e67e41 2869 ms = tu * 1024 / 1000;
bdcbd8e0
JB		 2870 sdata_info(sdata,
2871 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2872 mgmt->sa, tu, ms);
66e67e41 2873 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
89afe614 2874 assoc_data->timeout_started = true;
66e67e41 2875 if (ms > IEEE80211_ASSOC_TIMEOUT)
8d61ffa5
JB		 2876 run_again(sdata, assoc_data->timeout);
2877 return;
66e67e41
JB		 2878 }
2879
8d61ffa5 2880 bss = assoc_data->bss;
66e67e41
JB		 2881
2882 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2883 sdata_info(sdata, "%pM denied association (code=%d)\n",
2884 mgmt->sa, status_code);
66e67e41
JB		 2885 ieee80211_destroy_assoc_data(sdata, false);
2886 } else {
8d61ffa5 2887 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
66e67e41 2888 /* oops -- internal error -- send timeout for now */
10a9109f 2889 ieee80211_destroy_assoc_data(sdata, false);
959867fa 2890 cfg80211_assoc_timeout(sdata->dev, bss);
8d61ffa5 2891 return;
66e67e41 2892 }
635d999f 2893 sdata_info(sdata, "associated\n");
79ebfb85
JB		 2894
2895 /*
2896 * destroy assoc_data afterwards, as otherwise an idle
2897 * recalc after assoc_data is NULL but before associated
2898 * is set can cause the interface to go idle
2899 */
2900 ieee80211_destroy_assoc_data(sdata, true);
b0b6aa2c
EP		 2901
2902 /* get uapsd queues configuration */
2903 uapsd_queues = 0;
2904 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
2905 if (sdata->tx_conf[ac].uapsd)
2906 uapsd_queues |= BIT(ac);
66e67e41
JB		 2907 }
2908
b0b6aa2c 2909 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues);
66e67e41 2910}
8e3c1b77 2911
98c8fccf 2912static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
8e3c1b77 2913 struct ieee80211_mgmt *mgmt, size_t len,
98c8fccf 2914 struct ieee80211_rx_status *rx_status,
d45c4172 2915 struct ieee802_11_elems *elems)
98c8fccf
JB		 2916{
2917 struct ieee80211_local *local = sdata->local;
c2b13452 2918 struct ieee80211_bss *bss;
98c8fccf 2919 struct ieee80211_channel *channel;
56007a02 2920
8d61ffa5 2921 sdata_assert_lock(sdata);
b4f286a1 2922
3afc2167
EG		 2923 channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
2924 if (!channel)
98c8fccf
JB		 2925 return;
2926
98c8fccf 2927 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
d45c4172 2928 channel);
817cee76 2929 if (bss) {
817cee76 2930 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
d2722f8b 2931 ieee80211_rx_bss_put(local, bss);
817cee76 2932 }
f0706e82
JB		 2933}
2934
2935
f698d856 2936static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 2937 struct sk_buff *skb)
f0706e82 2938{
af6b6374 2939 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 2940 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 2941 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2942 size_t baselen, len = skb->len;
ae6a44e3
EK		 2943 struct ieee802_11_elems elems;
2944
15b7b062
KV		 2945 ifmgd = &sdata->u.mgd;
2946
8d61ffa5 2947 sdata_assert_lock(sdata);
77fdaa12 2948
b203ca39 2949 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
8e7cdbb6
TW		 2950 return; /* ignore ProbeResp to foreign address */
2951
ae6a44e3
EK		 2952 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2953 if (baselen > len)
2954 return;
2955
2956 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
b2e506bf 2957 false, &elems);
ae6a44e3 2958
d45c4172 2959 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
9859b81e 2960
77fdaa12 2961 if (ifmgd->associated &&
b203ca39 2962 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
4e5ff376 2963 ieee80211_reset_ap_probe(sdata);
66e67e41
JB		 2964
2965 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
b203ca39 2966 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
66e67e41 2967 /* got probe response, continue with auth */
bdcbd8e0 2968 sdata_info(sdata, "direct probe responded\n");
66e67e41
JB		 2969 ifmgd->auth_data->tries = 0;
2970 ifmgd->auth_data->timeout = jiffies;
89afe614 2971 ifmgd->auth_data->timeout_started = true;
8d61ffa5 2972 run_again(sdata, ifmgd->auth_data->timeout);
66e67e41 2973 }
f0706e82
JB		 2974}
2975
d91f36db
JB		 2976/*
2977 * This is the canonical list of information elements we care about,
2978 * the filter code also gives us all changes to the Microsoft OUI
c8d65917
SG		 2979 * (00:50:F2) vendor IE which is used for WMM which we need to track,
2980 * as well as the DTPC IE (part of the Cisco OUI) used for signaling
2981 * changes to requested client power.
d91f36db
JB		 2982 *
2983 * We implement beacon filtering in software since that means we can
2984 * avoid processing the frame here and in cfg80211, and userspace
2985 * will not be able to tell whether the hardware supports it or not.
2986 *
2987 * XXX: This list needs to be dynamic -- userspace needs to be able to
2988 * add items it requires. It also needs to be able to tell us to
2989 * look out for other vendor IEs.
2990 */
2991static const u64 care_about_ies =
1d4df3a5
JB		 2992 (1ULL << WLAN_EID_COUNTRY) |
2993 (1ULL << WLAN_EID_ERP_INFO) |
2994 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2995 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2996 (1ULL << WLAN_EID_HT_CAPABILITY) |
074d46d1 2997 (1ULL << WLAN_EID_HT_OPERATION);
d91f36db 2998
8d61ffa5
JB		 2999static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
3000 struct ieee80211_mgmt *mgmt, size_t len,
3001 struct ieee80211_rx_status *rx_status)
f0706e82 3002{
d91f36db 3003 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 3004 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 3005 size_t baselen;
3006 struct ieee802_11_elems elems;
f698d856 3007 struct ieee80211_local *local = sdata->local;
55de908a
JB		 3008 struct ieee80211_chanctx_conf *chanctx_conf;
3009 struct ieee80211_channel *chan;
bee7f586 3010 struct sta_info *sta;
471b3efd 3011 u32 changed = 0;
f87ad637 3012 bool erp_valid;
7a5158ef 3013 u8 erp_value = 0;
d91f36db 3014 u32 ncrc;
77fdaa12 3015 u8 *bssid;
8d61ffa5 3016 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
77fdaa12 3017
8d61ffa5 3018 sdata_assert_lock(sdata);
f0706e82 3019
ae6a44e3
EK		 3020 /* Process beacon from the current BSS */
3021 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3022 if (baselen > len)
8d61ffa5 3023 return;
ae6a44e3 3024
55de908a
JB		 3025 rcu_read_lock();
3026 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3027 if (!chanctx_conf) {
3028 rcu_read_unlock();
8d61ffa5 3029 return;
55de908a
JB		 3030 }
3031
4bf88530 3032 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
55de908a 3033 rcu_read_unlock();
8d61ffa5 3034 return;
55de908a 3035 }
4bf88530 3036 chan = chanctx_conf->def.chan;
55de908a 3037 rcu_read_unlock();
f0706e82 3038
c65dd147 3039 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
b203ca39 3040 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
66e67e41 3041 ieee802_11_parse_elems(mgmt->u.beacon.variable,
b2e506bf 3042 len - baselen, false, &elems);
77fdaa12 3043
d45c4172 3044 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
482a9c74
AB		 3045 if (elems.tim && !elems.parse_error) {
3046 const struct ieee80211_tim_ie *tim_ie = elems.tim;
3047 ifmgd->dtim_period = tim_ie->dtim_period;
3048 }
989c6505 3049 ifmgd->have_beacon = true;
c65dd147 3050 ifmgd->assoc_data->need_beacon = false;
ef429dad
JB		 3051 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3052 sdata->vif.bss_conf.sync_tsf =
3053 le64_to_cpu(mgmt->u.beacon.timestamp);
3054 sdata->vif.bss_conf.sync_device_ts =
3055 rx_status->device_timestamp;
3056 if (elems.tim)
3057 sdata->vif.bss_conf.sync_dtim_count =
3058 elems.tim->dtim_count;
3059 else
3060 sdata->vif.bss_conf.sync_dtim_count = 0;
3061 }
66e67e41
JB		 3062 /* continue assoc process */
3063 ifmgd->assoc_data->timeout = jiffies;
89afe614 3064 ifmgd->assoc_data->timeout_started = true;
8d61ffa5
JB		 3065 run_again(sdata, ifmgd->assoc_data->timeout);
3066 return;
66e67e41 3067 }
77fdaa12 3068
66e67e41 3069 if (!ifmgd->associated ||
b203ca39 3070 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
8d61ffa5 3071 return;
66e67e41 3072 bssid = ifmgd->associated->bssid;
f0706e82 3073
17e4ec14
JM		 3074 /* Track average RSSI from the Beacon frames of the current AP */
3075 ifmgd->last_beacon_signal = rx_status->signal;
3076 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3077 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3ba06c6f 3078 ifmgd->ave_beacon_signal = rx_status->signal * 16;
17e4ec14 3079 ifmgd->last_cqm_event_signal = 0;
391a200a 3080 ifmgd->count_beacon_signal = 1;
615f7b9b 3081 ifmgd->last_ave_beacon_signal = 0;
17e4ec14
JM		 3082 } else {
3083 ifmgd->ave_beacon_signal =
3084 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
3085 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
3086 ifmgd->ave_beacon_signal) / 16;
391a200a 3087 ifmgd->count_beacon_signal++;
17e4ec14 3088 }
615f7b9b
MV		 3089
3090 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3091 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3092 int sig = ifmgd->ave_beacon_signal;
3093 int last_sig = ifmgd->last_ave_beacon_signal;
3094
3095 /*
3096 * if signal crosses either of the boundaries, invoke callback
3097 * with appropriate parameters
3098 */
3099 if (sig > ifmgd->rssi_max_thold &&
3100 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3101 ifmgd->last_ave_beacon_signal = sig;
887da917 3102 drv_rssi_callback(local, sdata, RSSI_EVENT_HIGH);
615f7b9b
MV		 3103 } else if (sig < ifmgd->rssi_min_thold &&
3104 (last_sig >= ifmgd->rssi_max_thold ||
3105 last_sig == 0)) {
3106 ifmgd->last_ave_beacon_signal = sig;
887da917 3107 drv_rssi_callback(local, sdata, RSSI_EVENT_LOW);
615f7b9b
MV		 3108 }
3109 }
3110
17e4ec14 3111 if (bss_conf->cqm_rssi_thold &&
391a200a 3112 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
ea086359 3113 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
17e4ec14
JM		 3114 int sig = ifmgd->ave_beacon_signal / 16;
3115 int last_event = ifmgd->last_cqm_event_signal;
3116 int thold = bss_conf->cqm_rssi_thold;
3117 int hyst = bss_conf->cqm_rssi_hyst;
3118 if (sig < thold &&
3119 (last_event == 0 || sig < last_event - hyst)) {
3120 ifmgd->last_cqm_event_signal = sig;
3121 ieee80211_cqm_rssi_notify(
3122 &sdata->vif,
3123 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3124 GFP_KERNEL);
3125 } else if (sig > thold &&
3126 (last_event == 0 || sig > last_event + hyst)) {
3127 ifmgd->last_cqm_event_signal = sig;
3128 ieee80211_cqm_rssi_notify(
3129 &sdata->vif,
3130 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3131 GFP_KERNEL);
3132 }
3133 }
3134
392b9ffb 3135 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
bdcbd8e0 3136 mlme_dbg_ratelimited(sdata,
112c31f0 3137 "cancelling AP probe due to a received beacon\n");
392b9ffb 3138 ieee80211_reset_ap_probe(sdata);
92778180
JM		 3139 }
3140
b291ba11
JB		 3141 /*
3142 * Push the beacon loss detection into the future since
3143 * we are processing a beacon from the AP just now.
3144 */
d3a910a8 3145 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 3146
d91f36db
JB		 3147 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3148 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
b2e506bf 3149 len - baselen, false, &elems,
d91f36db
JB		 3150 care_about_ies, ncrc);
3151
25c9c875 3152 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
f87ad637
RR		 3153 bool directed_tim = ieee80211_check_tim(elems.tim,
3154 elems.tim_len,
3155 ifmgd->aid);
1fb3606b 3156 if (directed_tim) {
572e0012 3157 if (local->hw.conf.dynamic_ps_timeout > 0) {
70b12f26
RW		 3158 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3159 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3160 ieee80211_hw_config(local,
3161 IEEE80211_CONF_CHANGE_PS);
3162 }
572e0012 3163 ieee80211_send_nullfunc(local, sdata, 0);
6f0756a3 3164 } else if (!local->pspolling && sdata->u.mgd.powersave) {
572e0012
KV		 3165 local->pspolling = true;
3166
3167 /*
3168 * Here is assumed that the driver will be
3169 * able to send ps-poll frame and receive a
3170 * response even though power save mode is
3171 * enabled, but some drivers might require
3172 * to disable power save here. This needs
3173 * to be investigated.
3174 */
3175 ieee80211_send_pspoll(local, sdata);
3176 }
a97b77b9
VN		 3177 }
3178 }
7a5158ef 3179
488dd7b5 3180 if (sdata->vif.p2p) {
67baf663 3181 struct ieee80211_p2p_noa_attr noa = {};
488dd7b5
JB		 3182 int ret;
3183
3184 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3185 len - baselen,
3186 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
934457ee 3187 (u8 *) &noa, sizeof(noa));
67baf663
JD		 3188 if (ret >= 2) {
3189 if (sdata->u.mgd.p2p_noa_index != noa.index) {
3190 /* valid noa_attr and index changed */
3191 sdata->u.mgd.p2p_noa_index = noa.index;
3192 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3193 changed |= BSS_CHANGED_P2P_PS;
3194 /*
3195 * make sure we update all information, the CRC
3196 * mechanism doesn't look at P2P attributes.
3197 */
3198 ifmgd->beacon_crc_valid = false;
3199 }
3200 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3201 /* noa_attr not found and we had valid noa_attr before */
3202 sdata->u.mgd.p2p_noa_index = -1;
3203 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
488dd7b5 3204 changed |= BSS_CHANGED_P2P_PS;
488dd7b5
JB		 3205 ifmgd->beacon_crc_valid = false;
3206 }
3207 }
3208
d8ec4433 3209 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
8d61ffa5 3210 return;
30196673 3211 ifmgd->beacon_crc = ncrc;
d8ec4433 3212 ifmgd->beacon_crc_valid = true;
30196673 3213
d45c4172 3214 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
7d25745d 3215
d70b7616 3216 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
2ba45384 3217 rx_status->device_timestamp,
d70b7616
JB		 3218 &elems, true);
3219
095d81ce
JB		 3220 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3221 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
7d25745d
JB		 3222 elems.wmm_param_len))
3223 changed |= BSS_CHANGED_QOS;
3224
c65dd147
EG		 3225 /*
3226 * If we haven't had a beacon before, tell the driver about the
ef429dad 3227 * DTIM period (and beacon timing if desired) now.
c65dd147 3228 */
989c6505 3229 if (!ifmgd->have_beacon) {
c65dd147
EG		 3230 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3231 if (elems.tim)
3232 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3233 else
3234 bss_conf->dtim_period = 1;
ef429dad
JB		 3235
3236 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3237 sdata->vif.bss_conf.sync_tsf =
3238 le64_to_cpu(mgmt->u.beacon.timestamp);
3239 sdata->vif.bss_conf.sync_device_ts =
3240 rx_status->device_timestamp;
3241 if (elems.tim)
3242 sdata->vif.bss_conf.sync_dtim_count =
3243 elems.tim->dtim_count;
3244 else
3245 sdata->vif.bss_conf.sync_dtim_count = 0;
3246 }
3247
989c6505
AB		 3248 changed |= BSS_CHANGED_BEACON_INFO;
3249 ifmgd->have_beacon = true;
482a9c74
AB		 3250
3251 mutex_lock(&local->iflist_mtx);
3252 ieee80211_recalc_ps(local, -1);
3253 mutex_unlock(&local->iflist_mtx);
3254
ce857888 3255 ieee80211_recalc_ps_vif(sdata);
c65dd147
EG		 3256 }
3257
1946bed9 3258 if (elems.erp_info) {
7a5158ef
JB		 3259 erp_valid = true;
3260 erp_value = elems.erp_info[0];
3261 } else {
3262 erp_valid = false;
50c4afb9 3263 }
7a5158ef
JB		 3264 changed |= ieee80211_handle_bss_capability(sdata,
3265 le16_to_cpu(mgmt->u.beacon.capab_info),
3266 erp_valid, erp_value);
f0706e82 3267
1128958d 3268 mutex_lock(&local->sta_mtx);
bee7f586
JB		 3269 sta = sta_info_get(sdata, bssid);
3270
53b954ee
EP		 3271 if (ieee80211_config_bw(sdata, sta,
3272 elems.ht_cap_elem, elems.ht_operation,
30eb1dc2
JB		 3273 elems.vht_operation, bssid, &changed)) {
3274 mutex_unlock(&local->sta_mtx);
3275 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3276 WLAN_REASON_DEAUTH_LEAVING,
3277 true, deauth_buf);
6ff57cf8
JB		 3278 cfg80211_tx_mlme_mgmt(sdata->dev, deauth_buf,
3279 sizeof(deauth_buf));
8d61ffa5 3280 return;
30eb1dc2 3281 }
bee7f586
JB		 3282
3283 if (sta && elems.opmode_notif)
3284 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3285 rx_status->band, true);
1128958d 3286 mutex_unlock(&local->sta_mtx);
d3c990fb 3287
24a4e400
SG		 3288 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
3289 elems.country_elem,
3290 elems.country_elem_len,
c8d65917
SG		 3291 elems.pwr_constr_elem,
3292 elems.cisco_dtpc_elem);
3f2355cb 3293
471b3efd 3294 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 3295}
3296
1fa57d01
JB		 3297void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3298 struct sk_buff *skb)
f0706e82
JB		 3299{
3300 struct ieee80211_rx_status *rx_status;
f0706e82
JB		 3301 struct ieee80211_mgmt *mgmt;
3302 u16 fc;
1b3a2e49
JB		 3303 struct ieee802_11_elems elems;
3304 int ies_len;
f0706e82 3305
f0706e82
JB		 3306 rx_status = (struct ieee80211_rx_status *) skb->cb;
3307 mgmt = (struct ieee80211_mgmt *) skb->data;
3308 fc = le16_to_cpu(mgmt->frame_control);
3309
8d61ffa5 3310 sdata_lock(sdata);
77fdaa12 3311
66e67e41
JB		 3312 switch (fc & IEEE80211_FCTL_STYPE) {
3313 case IEEE80211_STYPE_BEACON:
8d61ffa5 3314 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
66e67e41
JB		 3315 break;
3316 case IEEE80211_STYPE_PROBE_RESP:
3317 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3318 break;
3319 case IEEE80211_STYPE_AUTH:
8d61ffa5 3320 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
66e67e41
JB		 3321 break;
3322 case IEEE80211_STYPE_DEAUTH:
8d61ffa5 3323 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
66e67e41
JB		 3324 break;
3325 case IEEE80211_STYPE_DISASSOC:
8d61ffa5 3326 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
66e67e41
JB		 3327 break;
3328 case IEEE80211_STYPE_ASSOC_RESP:
3329 case IEEE80211_STYPE_REASSOC_RESP:
8d61ffa5 3330 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
66e67e41
JB		 3331 break;
3332 case IEEE80211_STYPE_ACTION:
37799e52 3333 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
1b3a2e49
JB		 3334 ies_len = skb->len -
3335 offsetof(struct ieee80211_mgmt,
3336 u.action.u.chan_switch.variable);
37799e52
JB		 3337
3338 if (ies_len < 0)
3339 break;
3340
3341 ieee802_11_parse_elems(
3342 mgmt->u.action.u.chan_switch.variable,
b2e506bf 3343 ies_len, true, &elems);
37799e52
JB		 3344
3345 if (elems.parse_error)
3346 break;
3347
1b3a2e49 3348 ieee80211_sta_process_chanswitch(sdata,
2ba45384
LC		 3349 rx_status->mactime,
3350 rx_status->device_timestamp,
3351 &elems, false);
1b3a2e49
JB		 3352 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3353 ies_len = skb->len -
3354 offsetof(struct ieee80211_mgmt,
3355 u.action.u.ext_chan_switch.variable);
3356
3357 if (ies_len < 0)
3358 break;
3359
3360 ieee802_11_parse_elems(
3361 mgmt->u.action.u.ext_chan_switch.variable,
b2e506bf 3362 ies_len, true, &elems);
1b3a2e49
JB		 3363
3364 if (elems.parse_error)
3365 break;
3366
3367 /* for the handling code pretend this was also an IE */
3368 elems.ext_chansw_ie =
3369 &mgmt->u.action.u.ext_chan_switch.data;
3370
66e67e41 3371 ieee80211_sta_process_chanswitch(sdata,
2ba45384
LC		 3372 rx_status->mactime,
3373 rx_status->device_timestamp,
3374 &elems, false);
77fdaa12 3375 }
37799e52 3376 break;
77fdaa12 3377 }
8d61ffa5 3378 sdata_unlock(sdata);
f0706e82
JB		 3379}
3380
9c6bd790 3381static void ieee80211_sta_timer(unsigned long data)
f0706e82 3382{
60f8b39c
JB		 3383 struct ieee80211_sub_if_data *sdata =
3384 (struct ieee80211_sub_if_data *) data;
5bb644a0 3385
9b7d72c1 3386 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
f0706e82
JB		 3387}
3388
04ac3c0e 3389static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
6b684db1 3390 u8 *bssid, u8 reason, bool tx)
04ac3c0e 3391{
6ae16775 3392 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
04ac3c0e 3393
37ad3888 3394 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
6b684db1 3395 tx, frame_buf);
37ad3888 3396
6ff57cf8
JB		 3397 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3398 IEEE80211_DEAUTH_FRAME_LEN);
04ac3c0e
FF		 3399}
3400
66e67e41
JB		 3401static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
3402{
3403 struct ieee80211_local *local = sdata->local;
3404 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3405 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
1672c0e3 3406 u32 tx_flags = 0;
66e67e41 3407
8d61ffa5 3408 sdata_assert_lock(sdata);
66e67e41
JB		 3409
3410 if (WARN_ON_ONCE(!auth_data))
3411 return -EINVAL;
3412
66e67e41
JB		 3413 auth_data->tries++;
3414
3415 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
bdcbd8e0
JB		 3416 sdata_info(sdata, "authentication with %pM timed out\n",
3417 auth_data->bss->bssid);
66e67e41
JB		 3418
3419 /*
3420 * Most likely AP is not in the range so remove the
3421 * bss struct for that AP.
3422 */
3423 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3424
3425 return -ETIMEDOUT;
3426 }
3427
a1845fc7
JB		 3428 drv_mgd_prepare_tx(local, sdata);
3429
66e67e41 3430 if (auth_data->bss->proberesp_ies) {
6b8ece3a
JM		 3431 u16 trans = 1;
3432 u16 status = 0;
3433
bdcbd8e0
JB		 3434 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3435 auth_data->bss->bssid, auth_data->tries,
3436 IEEE80211_AUTH_MAX_TRIES);
66e67e41
JB		 3437
3438 auth_data->expected_transaction = 2;
6b8ece3a
JM		 3439
3440 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3441 trans = auth_data->sae_trans;
3442 status = auth_data->sae_status;
3443 auth_data->expected_transaction = trans;
3444 }
3445
6211dd12
SG		 3446 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3447 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3448 IEEE80211_TX_INTFL_MLME_CONN_TX;
3449
6b8ece3a
JM		 3450 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3451 auth_data->data, auth_data->data_len,
66e67e41 3452 auth_data->bss->bssid,
1672c0e3
JB		 3453 auth_data->bss->bssid, NULL, 0, 0,
3454 tx_flags);
66e67e41
JB		 3455 } else {
3456 const u8 *ssidie;
3457
bdcbd8e0
JB		 3458 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
3459 auth_data->bss->bssid, auth_data->tries,
3460 IEEE80211_AUTH_MAX_TRIES);
66e67e41 3461
9caf0364 3462 rcu_read_lock();
66e67e41 3463 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
9caf0364
JB		 3464 if (!ssidie) {
3465 rcu_read_unlock();
66e67e41 3466 return -EINVAL;
9caf0364 3467 }
66e67e41
JB		 3468 /*
3469 * Direct probe is sent to broadcast address as some APs
3470 * will not answer to direct packet in unassociated state.
3471 */
3472 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
6211dd12 3473 NULL, 0, (u32) -1, true, 0,
55de908a 3474 auth_data->bss->channel, false);
9caf0364 3475 rcu_read_unlock();
66e67e41
JB		 3476 }
3477
6211dd12 3478 if (tx_flags == 0) {
1672c0e3 3479 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
cb236d2d 3480 auth_data->timeout_started = true;
8d61ffa5 3481 run_again(sdata, auth_data->timeout);
89afe614 3482 } else {
cb236d2d
JB		 3483 auth_data->timeout =
3484 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3485 auth_data->timeout_started = true;
3486 run_again(sdata, auth_data->timeout);
1672c0e3 3487 }
66e67e41
JB		 3488
3489 return 0;
3490}
3491
3492static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3493{
3494 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3495 struct ieee80211_local *local = sdata->local;
3496
8d61ffa5 3497 sdata_assert_lock(sdata);
66e67e41 3498
66e67e41
JB		 3499 assoc_data->tries++;
3500 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
bdcbd8e0
JB		 3501 sdata_info(sdata, "association with %pM timed out\n",
3502 assoc_data->bss->bssid);
66e67e41
JB		 3503
3504 /*
3505 * Most likely AP is not in the range so remove the
3506 * bss struct for that AP.
3507 */
3508 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3509
3510 return -ETIMEDOUT;
3511 }
3512
bdcbd8e0
JB		 3513 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3514 assoc_data->bss->bssid, assoc_data->tries,
3515 IEEE80211_ASSOC_MAX_TRIES);
66e67e41
JB		 3516 ieee80211_send_assoc(sdata);
3517
1672c0e3
JB		 3518 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
3519 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
89afe614 3520 assoc_data->timeout_started = true;
8d61ffa5 3521 run_again(sdata, assoc_data->timeout);
89afe614 3522 } else {
cb236d2d
JB		 3523 assoc_data->timeout =
3524 round_jiffies_up(jiffies +
3525 IEEE80211_ASSOC_TIMEOUT_LONG);
3526 assoc_data->timeout_started = true;
3527 run_again(sdata, assoc_data->timeout);
1672c0e3 3528 }
66e67e41
JB		 3529
3530 return 0;
3531}
3532
1672c0e3
JB		 3533void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3534 __le16 fc, bool acked)
3535{
3536 struct ieee80211_local *local = sdata->local;
3537
3538 sdata->u.mgd.status_fc = fc;
3539 sdata->u.mgd.status_acked = acked;
3540 sdata->u.mgd.status_received = true;
3541
3542 ieee80211_queue_work(&local->hw, &sdata->work);
3543}
3544
1fa57d01 3545void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 3546{
9c6bd790 3547 struct ieee80211_local *local = sdata->local;
1fa57d01 3548 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 3549
8d61ffa5 3550 sdata_lock(sdata);
77fdaa12 3551
1672c0e3
JB		 3552 if (ifmgd->status_received) {
3553 __le16 fc = ifmgd->status_fc;
3554 bool status_acked = ifmgd->status_acked;
3555
3556 ifmgd->status_received = false;
3557 if (ifmgd->auth_data &&
3558 (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) {
3559 if (status_acked) {
3560 ifmgd->auth_data->timeout =
3561 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
8d61ffa5 3562 run_again(sdata, ifmgd->auth_data->timeout);
1672c0e3
JB		 3563 } else {
3564 ifmgd->auth_data->timeout = jiffies - 1;
3565 }
89afe614 3566 ifmgd->auth_data->timeout_started = true;
1672c0e3
JB		 3567 } else if (ifmgd->assoc_data &&
3568 (ieee80211_is_assoc_req(fc) ||
3569 ieee80211_is_reassoc_req(fc))) {
3570 if (status_acked) {
3571 ifmgd->assoc_data->timeout =
3572 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
8d61ffa5 3573 run_again(sdata, ifmgd->assoc_data->timeout);
1672c0e3
JB		 3574 } else {
3575 ifmgd->assoc_data->timeout = jiffies - 1;
3576 }
89afe614 3577 ifmgd->assoc_data->timeout_started = true;
1672c0e3
JB		 3578 }
3579 }
3580
89afe614 3581 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
66e67e41
JB		 3582 time_after(jiffies, ifmgd->auth_data->timeout)) {
3583 if (ifmgd->auth_data->done) {
3584 /*
3585 * ok ... we waited for assoc but userspace didn't,
3586 * so let's just kill the auth data
3587 */
3588 ieee80211_destroy_auth_data(sdata, false);
3589 } else if (ieee80211_probe_auth(sdata)) {
3590 u8 bssid[ETH_ALEN];
3591
3592 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3593
3594 ieee80211_destroy_auth_data(sdata, false);
3595
6ff57cf8 3596 cfg80211_auth_timeout(sdata->dev, bssid);
66e67e41 3597 }
89afe614 3598 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
8d61ffa5 3599 run_again(sdata, ifmgd->auth_data->timeout);
66e67e41 3600
89afe614 3601 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
66e67e41 3602 time_after(jiffies, ifmgd->assoc_data->timeout)) {
989c6505 3603 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
66e67e41 3604 ieee80211_do_assoc(sdata)) {
959867fa 3605 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
66e67e41
JB		 3606
3607 ieee80211_destroy_assoc_data(sdata, false);
959867fa 3608 cfg80211_assoc_timeout(sdata->dev, bss);
66e67e41 3609 }
89afe614 3610 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
8d61ffa5 3611 run_again(sdata, ifmgd->assoc_data->timeout);
66e67e41 3612
392b9ffb 3613 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
b291ba11 3614 ifmgd->associated) {
a43abf29 3615 u8 bssid[ETH_ALEN];
72a8a3ed 3616 int max_tries;
a43abf29 3617
0c1ad2ca 3618 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 3619
72a8a3ed 3620 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
180205bd 3621 max_tries = max_nullfunc_tries;
72a8a3ed 3622 else
180205bd 3623 max_tries = max_probe_tries;
72a8a3ed 3624
4e5ff376
FF		 3625 /* ACK received for nullfunc probing frame */
3626 if (!ifmgd->probe_send_count)
3627 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 3628 else if (ifmgd->nullfunc_failed) {
3629 if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3630 mlme_dbg(sdata,
3631 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3632 bssid, ifmgd->probe_send_count,
3633 max_tries);
04ac3c0e
FF		 3634 ieee80211_mgd_probe_ap_send(sdata);
3635 } else {
bdcbd8e0
JB		 3636 mlme_dbg(sdata,
3637 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3638 bssid);
95acac61 3639 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1
JB		 3640 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3641 false);
04ac3c0e
FF		 3642 }
3643 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
8d61ffa5 3644 run_again(sdata, ifmgd->probe_timeout);
04ac3c0e 3645 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
bdcbd8e0
JB		 3646 mlme_dbg(sdata,
3647 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3648 bssid, probe_wait_ms);
95acac61 3649 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 3650 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
04ac3c0e 3651 } else if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3652 mlme_dbg(sdata,
3653 "No probe response from AP %pM after %dms, try %d/%i\n",
3654 bssid, probe_wait_ms,
3655 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 3656 ieee80211_mgd_probe_ap_send(sdata);
3657 } else {
b291ba11
JB		 3658 /*
3659 * We actually lost the connection ... or did we?
3660 * Let's make sure!
3661 */
b38afa87
BG		 3662 wiphy_debug(local->hw.wiphy,
3663 "%s: No probe response from AP %pM"
3664 " after %dms, disconnecting.\n",
3665 sdata->name,
180205bd 3666 bssid, probe_wait_ms);
04ac3c0e 3667
95acac61 3668 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 3669 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
b291ba11
JB		 3670 }
3671 }
3672
8d61ffa5 3673 sdata_unlock(sdata);
f0706e82
JB		 3674}
3675
b291ba11
JB		 3676static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3677{
3678 struct ieee80211_sub_if_data *sdata =
3679 (struct ieee80211_sub_if_data *) data;
3680 struct ieee80211_local *local = sdata->local;
3681
3682 if (local->quiescing)
3683 return;
3684
e5593f56
MK		 3685 if (sdata->vif.csa_active)
3686 return;
3687
682bd38b 3688 sdata->u.mgd.connection_loss = false;
1e4dcd01
JO		 3689 ieee80211_queue_work(&sdata->local->hw,
3690 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 3691}
3692
3693static void ieee80211_sta_conn_mon_timer(unsigned long data)
3694{
3695 struct ieee80211_sub_if_data *sdata =
3696 (struct ieee80211_sub_if_data *) data;
3697 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3698 struct ieee80211_local *local = sdata->local;
3699
3700 if (local->quiescing)
3701 return;
3702
e5593f56
MK		 3703 if (sdata->vif.csa_active)
3704 return;
3705
42935eca 3706 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 3707}
3708
3709static void ieee80211_sta_monitor_work(struct work_struct *work)
3710{
3711 struct ieee80211_sub_if_data *sdata =
3712 container_of(work, struct ieee80211_sub_if_data,
3713 u.mgd.monitor_work);
3714
3715 ieee80211_mgd_probe_ap(sdata, false);
3716}
3717
9c6bd790
JB		 3718static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3719{
494f1fe5
EP		 3720 u32 flags;
3721
ad935687 3722 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
925e64c3 3723 __ieee80211_stop_poll(sdata);
ad935687 3724
b291ba11 3725 /* let's probe the connection once */
494f1fe5
EP		 3726 flags = sdata->local->hw.flags;
3727 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3728 ieee80211_queue_work(&sdata->local->hw,
3729 &sdata->u.mgd.monitor_work);
b291ba11 3730 /* and do all the other regular work too */
64592c8f 3731 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 3732 }
9c6bd790 3733}
f0706e82 3734
b8360ab8 3735#ifdef CONFIG_PM
1a1cb744
JB		 3736void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
3737{
3738 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3739 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3740
3741 sdata_lock(sdata);
3742
c52666ae
EG		 3743 if (ifmgd->auth_data || ifmgd->assoc_data) {
3744 const u8 *bssid = ifmgd->auth_data ?
3745 ifmgd->auth_data->bss->bssid :
3746 ifmgd->assoc_data->bss->bssid;
3747
1a1cb744 3748 /*
c52666ae
EG		 3749 * If we are trying to authenticate / associate while suspending,
3750 * cfg80211 won't know and won't actually abort those attempts,
3751 * thus we need to do that ourselves.
1a1cb744 3752 */
c52666ae 3753 ieee80211_send_deauth_disassoc(sdata, bssid,
1a1cb744
JB		 3754 IEEE80211_STYPE_DEAUTH,
3755 WLAN_REASON_DEAUTH_LEAVING,
3756 false, frame_buf);
c52666ae
EG		 3757 if (ifmgd->assoc_data)
3758 ieee80211_destroy_assoc_data(sdata, false);
3759 if (ifmgd->auth_data)
3760 ieee80211_destroy_auth_data(sdata, false);
1a1cb744
JB		 3761 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3762 IEEE80211_DEAUTH_FRAME_LEN);
3763 }
3764
3765 sdata_unlock(sdata);
3766}
3767
b8360ab8
JB		 3768void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
3769{
3770 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3771
8d61ffa5 3772 sdata_lock(sdata);
b8360ab8 3773 if (!ifmgd->associated) {
8d61ffa5 3774 sdata_unlock(sdata);
b8360ab8
JB		 3775 return;
3776 }
3777
3778 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
3779 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
3780 mlme_dbg(sdata, "driver requested disconnect after resume\n");
3781 ieee80211_sta_connection_lost(sdata,
3782 ifmgd->associated->bssid,
3783 WLAN_REASON_UNSPECIFIED,
3784 true);
8d61ffa5 3785 sdata_unlock(sdata);
b8360ab8
JB		 3786 return;
3787 }
8d61ffa5 3788 sdata_unlock(sdata);
b8360ab8
JB		 3789}
3790#endif
3791
9c6bd790
JB		 3792/* interface setup */
3793void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 3794{
46900298 3795 struct ieee80211_if_managed *ifmgd;
988c0f72 3796
46900298 3797 ifmgd = &sdata->u.mgd;
b291ba11 3798 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 3799 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 3800 INIT_WORK(&ifmgd->beacon_connection_loss_work,
3801 ieee80211_beacon_connection_loss_work);
882a7c69
JB		 3802 INIT_WORK(&ifmgd->csa_connection_drop_work,
3803 ieee80211_csa_connection_drop_work);
687da132 3804 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
81dd2b88
AN		 3805 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
3806 ieee80211_tdls_peer_del_work);
46900298 3807 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 3808 (unsigned long) sdata);
b291ba11
JB		 3809 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
3810 (unsigned long) sdata);
3811 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
3812 (unsigned long) sdata);
46900298 3813 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 3814 (unsigned long) sdata);
9c6bd790 3815
ab1faead 3816 ifmgd->flags = 0;
1478acb3 3817 ifmgd->powersave = sdata->wdev.ps;
219c3867
AB		 3818 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
3819 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
67baf663 3820 ifmgd->p2p_noa_index = -1;
bbbdff9e 3821
0d8614b4 3822 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
0f78231b
JB		 3823 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
3824 else
3825 ifmgd->req_smps = IEEE80211_SMPS_OFF;
f0706e82
JB		 3826}
3827
77fdaa12
JB		 3828/* scan finished notification */
3829void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 3830{
31ee67a1 3831 struct ieee80211_sub_if_data *sdata;
60f8b39c 3832
77fdaa12
JB		 3833 /* Restart STA timers */
3834 rcu_read_lock();
370bd005
BG		 3835 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3836 if (ieee80211_sdata_running(sdata))
3837 ieee80211_restart_sta_timer(sdata);
3838 }
77fdaa12
JB		 3839 rcu_read_unlock();
3840}
60f8b39c 3841
77fdaa12
JB		 3842int ieee80211_max_network_latency(struct notifier_block *nb,
3843 unsigned long data, void *dummy)
3844{
3845 s32 latency_usec = (s32) data;
3846 struct ieee80211_local *local =
3847 container_of(nb, struct ieee80211_local,
3848 network_latency_notifier);
1fa6f4af 3849
77fdaa12
JB		 3850 mutex_lock(&local->iflist_mtx);
3851 ieee80211_recalc_ps(local, latency_usec);
3852 mutex_unlock(&local->iflist_mtx);
dfe67012 3853
8bd811aa 3854 return NOTIFY_OK;
9c6bd790
JB		 3855}
3856
f2d9d270
JB		 3857static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
3858 struct cfg80211_bss *cbss)
3859{
3860 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3861 const u8 *ht_cap_ie, *vht_cap_ie;
3862 const struct ieee80211_ht_cap *ht_cap;
3863 const struct ieee80211_vht_cap *vht_cap;
3864 u8 chains = 1;
3865
3866 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
3867 return chains;
3868
9caf0364 3869 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
f2d9d270
JB		 3870 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
3871 ht_cap = (void *)(ht_cap_ie + 2);
3872 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
3873 /*
3874 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
3875 * "Tx Unequal Modulation Supported" fields.
3876 */
3877 }
3878
3879 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
3880 return chains;
3881
9caf0364 3882 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
f2d9d270
JB		 3883 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
3884 u8 nss;
3885 u16 tx_mcs_map;
3886
3887 vht_cap = (void *)(vht_cap_ie + 2);
3888 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
3889 for (nss = 8; nss > 0; nss--) {
3890 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
3891 IEEE80211_VHT_MCS_NOT_SUPPORTED)
3892 break;
3893 }
3894 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
3895 chains = max(chains, nss);
3896 }
3897
3898 return chains;
3899}
3900
b17166a7
JB		 3901static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
3902 struct cfg80211_bss *cbss)
a1cf775d
JB		 3903{
3904 struct ieee80211_local *local = sdata->local;
3905 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
53b954ee 3906 const struct ieee80211_ht_cap *ht_cap = NULL;
24398e39 3907 const struct ieee80211_ht_operation *ht_oper = NULL;
f2d9d270 3908 const struct ieee80211_vht_operation *vht_oper = NULL;
24398e39 3909 struct ieee80211_supported_band *sband;
4bf88530 3910 struct cfg80211_chan_def chandef;
f2d9d270 3911 int ret;
a1cf775d 3912
24398e39
JB		 3913 sband = local->hw.wiphy->bands[cbss->channel->band];
3914
f2d9d270
JB		 3915 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
3916 IEEE80211_STA_DISABLE_80P80MHZ |
3917 IEEE80211_STA_DISABLE_160MHZ);
3918
9caf0364
JB		 3919 rcu_read_lock();
3920
f2d9d270
JB		 3921 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3922 sband->ht_cap.ht_supported) {
53b954ee 3923 const u8 *ht_oper_ie, *ht_cap_ie;
24398e39 3924
9caf0364 3925 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
24398e39
JB		 3926 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3927 ht_oper = (void *)(ht_oper_ie + 2);
08e6effa 3928
53b954ee
EP		 3929 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
3930 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
3931 ht_cap = (void *)(ht_cap_ie + 2);
3932
3933 if (!ht_cap) {
08e6effa
JB		 3934 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3935 ht_oper = NULL;
3936 }
24398e39
JB		 3937 }
3938
f2d9d270
JB		 3939 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3940 sband->vht_cap.vht_supported) {
08e6effa 3941 const u8 *vht_oper_ie, *vht_cap;
f2d9d270 3942
9caf0364
JB		 3943 vht_oper_ie = ieee80211_bss_get_ie(cbss,
3944 WLAN_EID_VHT_OPERATION);
f2d9d270
JB		 3945 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
3946 vht_oper = (void *)(vht_oper_ie + 2);
3947 if (vht_oper && !ht_oper) {
3948 vht_oper = NULL;
bdcbd8e0 3949 sdata_info(sdata,
f2d9d270 3950 "AP advertised VHT without HT, disabling both\n");
cb145022
JB		 3951 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3952 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
24398e39 3953 }
08e6effa
JB		 3954
3955 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
3956 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
3957 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3958 vht_oper = NULL;
3959 }
24398e39
JB		 3960 }
3961
f2d9d270
JB		 3962 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
3963 cbss->channel,
53b954ee 3964 ht_cap, ht_oper, vht_oper,
5cdaed1e 3965 &chandef, false);
04ecd257 3966
f2d9d270
JB		 3967 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
3968 local->rx_chains);
24398e39 3969
9caf0364
JB		 3970 rcu_read_unlock();
3971
04ecd257
JB		 3972 /* will change later if needed */
3973 sdata->smps_mode = IEEE80211_SMPS_OFF;
3974
34a3740d 3975 mutex_lock(&local->mtx);
f2d9d270
JB		 3976 /*
3977 * If this fails (possibly due to channel context sharing
3978 * on incompatible channels, e.g. 80+80 and 160 sharing the
3979 * same control channel) try to use a smaller bandwidth.
3980 */
3981 ret = ieee80211_vif_use_channel(sdata, &chandef,
3982 IEEE80211_CHANCTX_SHARED);
0418a445
SW		 3983
3984 /* don't downgrade for 5 and 10 MHz channels, though. */
3985 if (chandef.width == NL80211_CHAN_WIDTH_5 ||
3986 chandef.width == NL80211_CHAN_WIDTH_10)
34a3740d 3987 goto out;
0418a445 3988
d601cd8d 3989 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
e6b7cde4 3990 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
d601cd8d
JB		 3991 ret = ieee80211_vif_use_channel(sdata, &chandef,
3992 IEEE80211_CHANCTX_SHARED);
3993 }
34a3740d
JB		 3994 out:
3995 mutex_unlock(&local->mtx);
f2d9d270 3996 return ret;
b17166a7
JB		 3997}
3998
3999static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
4000 struct cfg80211_bss *cbss, bool assoc)
4001{
4002 struct ieee80211_local *local = sdata->local;
4003 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4004 struct ieee80211_bss *bss = (void *)cbss->priv;
4005 struct sta_info *new_sta = NULL;
4006 bool have_sta = false;
4007 int err;
4008
4009 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
4010 return -EINVAL;
4011
4012 if (assoc) {
4013 rcu_read_lock();
4014 have_sta = sta_info_get(sdata, cbss->bssid);
4015 rcu_read_unlock();
4016 }
4017
4018 if (!have_sta) {
4019 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4020 if (!new_sta)
4021 return -ENOMEM;
4022 }
13e0c8e3 4023 if (new_sta) {
5d6a1b06
JB		 4024 u32 rates = 0, basic_rates = 0;
4025 bool have_higher_than_11mbit;
4026 int min_rate = INT_MAX, min_rate_index = -1;
2103dec1 4027 struct ieee80211_chanctx_conf *chanctx_conf;
b17166a7 4028 struct ieee80211_supported_band *sband;
8cef2c9d 4029 const struct cfg80211_bss_ies *ies;
2103dec1
SW		 4030 int shift;
4031 u32 rate_flags;
b17166a7
JB		 4032
4033 sband = local->hw.wiphy->bands[cbss->channel->band];
4034
4035 err = ieee80211_prep_channel(sdata, cbss);
4036 if (err) {
4037 sta_info_free(local, new_sta);
2103dec1 4038 return -EINVAL;
b17166a7 4039 }
2103dec1
SW		 4040 shift = ieee80211_vif_get_shift(&sdata->vif);
4041
4042 rcu_read_lock();
4043 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4044 if (WARN_ON(!chanctx_conf)) {
4045 rcu_read_unlock();
c368ddaa 4046 sta_info_free(local, new_sta);
2103dec1
SW		 4047 return -EINVAL;
4048 }
4049 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
4050 rcu_read_unlock();
5d6a1b06 4051
5d6a1b06
JB		 4052 ieee80211_get_rates(sband, bss->supp_rates,
4053 bss->supp_rates_len,
4054 &rates, &basic_rates,
4055 &have_higher_than_11mbit,
2103dec1
SW		 4056 &min_rate, &min_rate_index,
4057 shift, rate_flags);
5d6a1b06
JB		 4058
4059 /*
4060 * This used to be a workaround for basic rates missing
4061 * in the association response frame. Now that we no
4062 * longer use the basic rates from there, it probably
4063 * doesn't happen any more, but keep the workaround so
4064 * in case some *other* APs are buggy in different ways
4065 * we can connect -- with a warning.
4066 */
4067 if (!basic_rates && min_rate_index >= 0) {
bdcbd8e0
JB		 4068 sdata_info(sdata,
4069 "No basic rates, using min rate instead\n");
5d6a1b06
JB		 4070 basic_rates = BIT(min_rate_index);
4071 }
4072
13e0c8e3 4073 new_sta->sta.supp_rates[cbss->channel->band] = rates;
5d6a1b06
JB		 4074 sdata->vif.bss_conf.basic_rates = basic_rates;
4075
4076 /* cf. IEEE 802.11 9.2.12 */
55de908a 4077 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
5d6a1b06
JB		 4078 have_higher_than_11mbit)
4079 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
4080 else
4081 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
4082
4083 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
4084
8c358bcd
JB		 4085 /* set timing information */
4086 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
8cef2c9d 4087 rcu_read_lock();
ef429dad
JB		 4088 ies = rcu_dereference(cbss->beacon_ies);
4089 if (ies) {
4090 const u8 *tim_ie;
4091
4092 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4093 sdata->vif.bss_conf.sync_device_ts =
4094 bss->device_ts_beacon;
4095 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4096 ies->data, ies->len);
4097 if (tim_ie && tim_ie[1] >= 2)
4098 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
4099 else
4100 sdata->vif.bss_conf.sync_dtim_count = 0;
4101 } else if (!(local->hw.flags &
4102 IEEE80211_HW_TIMING_BEACON_ONLY)) {
4103 ies = rcu_dereference(cbss->proberesp_ies);
4104 /* must be non-NULL since beacon IEs were NULL */
4105 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4106 sdata->vif.bss_conf.sync_device_ts =
4107 bss->device_ts_presp;
4108 sdata->vif.bss_conf.sync_dtim_count = 0;
4109 } else {
4110 sdata->vif.bss_conf.sync_tsf = 0;
4111 sdata->vif.bss_conf.sync_device_ts = 0;
4112 sdata->vif.bss_conf.sync_dtim_count = 0;
4113 }
8cef2c9d 4114 rcu_read_unlock();
8c358bcd
JB		 4115
4116 /* tell driver about BSSID, basic rates and timing */
5d6a1b06 4117 ieee80211_bss_info_change_notify(sdata,
8c358bcd
JB		 4118 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4119 BSS_CHANGED_BEACON_INT);
a1cf775d
JB		 4120
4121 if (assoc)
13e0c8e3 4122 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
a1cf775d 4123
13e0c8e3
JB		 4124 err = sta_info_insert(new_sta);
4125 new_sta = NULL;
a1cf775d 4126 if (err) {
bdcbd8e0
JB		 4127 sdata_info(sdata,
4128 "failed to insert STA entry for the AP (error %d)\n",
4129 err);
a1cf775d
JB		 4130 return err;
4131 }
4132 } else
b203ca39 4133 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
a1cf775d
JB		 4134
4135 return 0;
4136}
4137
77fdaa12
JB		 4138/* config hooks */
4139int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4140 struct cfg80211_auth_request *req)
9c6bd790 4141{
66e67e41
JB		 4142 struct ieee80211_local *local = sdata->local;
4143 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4144 struct ieee80211_mgd_auth_data *auth_data;
77fdaa12 4145 u16 auth_alg;
66e67e41
JB		 4146 int err;
4147
4148 /* prepare auth data structure */
9c6bd790 4149
77fdaa12
JB		 4150 switch (req->auth_type) {
4151 case NL80211_AUTHTYPE_OPEN_SYSTEM:
4152 auth_alg = WLAN_AUTH_OPEN;
4153 break;
4154 case NL80211_AUTHTYPE_SHARED_KEY:
66e67e41 4155 if (IS_ERR(local->wep_tx_tfm))
9dca9c49 4156 return -EOPNOTSUPP;
77fdaa12
JB		 4157 auth_alg = WLAN_AUTH_SHARED_KEY;
4158 break;
4159 case NL80211_AUTHTYPE_FT:
4160 auth_alg = WLAN_AUTH_FT;
4161 break;
4162 case NL80211_AUTHTYPE_NETWORK_EAP:
4163 auth_alg = WLAN_AUTH_LEAP;
4164 break;
6b8ece3a
JM		 4165 case NL80211_AUTHTYPE_SAE:
4166 auth_alg = WLAN_AUTH_SAE;
4167 break;
77fdaa12
JB		 4168 default:
4169 return -EOPNOTSUPP;
60f8b39c 4170 }
77fdaa12 4171
6b8ece3a
JM		 4172 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
4173 req->ie_len, GFP_KERNEL);
66e67e41 4174 if (!auth_data)
9c6bd790 4175 return -ENOMEM;
77fdaa12 4176
66e67e41 4177 auth_data->bss = req->bss;
77fdaa12 4178
6b8ece3a
JM		 4179 if (req->sae_data_len >= 4) {
4180 __le16 *pos = (__le16 *) req->sae_data;
4181 auth_data->sae_trans = le16_to_cpu(pos[0]);
4182 auth_data->sae_status = le16_to_cpu(pos[1]);
4183 memcpy(auth_data->data, req->sae_data + 4,
4184 req->sae_data_len - 4);
4185 auth_data->data_len += req->sae_data_len - 4;
4186 }
4187
77fdaa12 4188 if (req->ie && req->ie_len) {
6b8ece3a
JM		 4189 memcpy(&auth_data->data[auth_data->data_len],
4190 req->ie, req->ie_len);
4191 auth_data->data_len += req->ie_len;
9c6bd790 4192 }
77fdaa12 4193
fffd0934 4194 if (req->key && req->key_len) {
66e67e41
JB		 4195 auth_data->key_len = req->key_len;
4196 auth_data->key_idx = req->key_idx;
4197 memcpy(auth_data->key, req->key, req->key_len);
fffd0934
JB		 4198 }
4199
66e67e41 4200 auth_data->algorithm = auth_alg;
60f8b39c 4201
66e67e41 4202 /* try to authenticate/probe */
2a33bee2 4203
66e67e41
JB		 4204 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4205 ifmgd->assoc_data) {
4206 err = -EBUSY;
4207 goto err_free;
2a33bee2
GE		 4208 }
4209
66e67e41
JB		 4210 if (ifmgd->auth_data)
4211 ieee80211_destroy_auth_data(sdata, false);
2a33bee2 4212
66e67e41
JB		 4213 /* prep auth_data so we don't go into idle on disassoc */
4214 ifmgd->auth_data = auth_data;
af6b6374 4215
7b119dc0
JB		 4216 if (ifmgd->associated) {
4217 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4218
4219 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4220 WLAN_REASON_UNSPECIFIED,
4221 false, frame_buf);
4222
6ff57cf8
JB		 4223 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4224 sizeof(frame_buf));
7b119dc0 4225 }
af6b6374 4226
bdcbd8e0 4227 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
e5b900d2 4228
a1cf775d
JB		 4229 err = ieee80211_prep_connection(sdata, req->bss, false);
4230 if (err)
66e67e41 4231 goto err_clear;
af6b6374 4232
66e67e41
JB		 4233 err = ieee80211_probe_auth(sdata);
4234 if (err) {
66e67e41
JB		 4235 sta_info_destroy_addr(sdata, req->bss->bssid);
4236 goto err_clear;
4237 }
4238
4239 /* hold our own reference */
5b112d3d 4240 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
8d61ffa5 4241 return 0;
66e67e41
JB		 4242
4243 err_clear:
3d2abdfd
EP		 4244 memset(ifmgd->bssid, 0, ETH_ALEN);
4245 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 4246 ifmgd->auth_data = NULL;
4247 err_free:
4248 kfree(auth_data);
66e67e41 4249 return err;
af6b6374
JB		 4250}
4251
095d81ce
JB		 4252static bool ieee80211_usable_wmm_params(struct ieee80211_sub_if_data *sdata,
4253 const u8 *wmm_param, int len)
4254{
4255 const u8 *pos;
4256 size_t left;
4257
4258 if (len < 8)
4259 return false;
4260
4261 if (wmm_param[5] != 1 /* version */)
4262 return false;
4263
4264 pos = wmm_param + 8;
4265 left = len - 8;
4266
4267 for (; left >= 4; left -= 4, pos += 4) {
4268 u8 aifsn = pos[0] & 0x0f;
4269 u8 ecwmin = pos[1] & 0x0f;
4270 u8 ecwmax = (pos[1] & 0xf0) >> 4;
4271 int aci = (pos[0] >> 5) & 0x03;
4272
4273 if (aifsn < 2) {
4274 sdata_info(sdata,
4275 "AP has invalid WMM params (AIFSN=%d for ACI %d), disabling WMM\n",
4276 aifsn, aci);
4277 return false;
4278 }
4279 if (ecwmin > ecwmax) {
4280 sdata_info(sdata,
4281 "AP has invalid WMM params (ECWmin/max=%d/%d for ACI %d), disabling WMM\n",
4282 ecwmin, ecwmax, aci);
4283 return false;
4284 }
4285 }
4286
4287 return true;
4288}
4289
77fdaa12
JB		 4290int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4291 struct cfg80211_assoc_request *req)
f0706e82 4292{
66e67e41 4293 struct ieee80211_local *local = sdata->local;
77fdaa12 4294 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 4295 struct ieee80211_bss *bss = (void *)req->bss->priv;
66e67e41 4296 struct ieee80211_mgd_assoc_data *assoc_data;
c65dd147 4297 const struct cfg80211_bss_ies *beacon_ies;
4e74bfdb 4298 struct ieee80211_supported_band *sband;
b08fbbd8 4299 const u8 *ssidie, *ht_ie, *vht_ie;
2a33bee2 4300 int i, err;
f0706e82 4301
66e67e41
JB		 4302 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4303 if (!assoc_data)
4304 return -ENOMEM;
4305
9caf0364
JB		 4306 rcu_read_lock();
4307 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4308 if (!ssidie) {
4309 rcu_read_unlock();
4310 kfree(assoc_data);
4311 return -EINVAL;
4312 }
4313 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4314 assoc_data->ssid_len = ssidie[1];
4315 rcu_read_unlock();
4316
7b119dc0
JB		 4317 if (ifmgd->associated) {
4318 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4319
4320 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4321 WLAN_REASON_UNSPECIFIED,
4322 false, frame_buf);
4323
6ff57cf8
JB		 4324 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4325 sizeof(frame_buf));
7b119dc0 4326 }
66e67e41
JB		 4327
4328 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4329 err = -EBUSY;
4330 goto err_free;
af6b6374 4331 }
77fdaa12 4332
66e67e41
JB		 4333 if (ifmgd->assoc_data) {
4334 err = -EBUSY;
4335 goto err_free;
4336 }
77fdaa12 4337
66e67e41
JB		 4338 if (ifmgd->auth_data) {
4339 bool match;
4340
4341 /* keep sta info, bssid if matching */
b203ca39 4342 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
66e67e41 4343 ieee80211_destroy_auth_data(sdata, match);
2a33bee2
GE		 4344 }
4345
66e67e41 4346 /* prepare assoc data */
095d81ce 4347
d8ec4433
JO		 4348 ifmgd->beacon_crc_valid = false;
4349
095d81ce
JB		 4350 assoc_data->wmm = bss->wmm_used &&
4351 (local->hw.queues >= IEEE80211_NUM_ACS);
4352 if (assoc_data->wmm) {
4353 /* try to check validity of WMM params IE */
4354 const struct cfg80211_bss_ies *ies;
4355 const u8 *wp, *start, *end;
4356
4357 rcu_read_lock();
4358 ies = rcu_dereference(req->bss->ies);
4359 start = ies->data;
4360 end = start + ies->len;
4361
4362 while (true) {
4363 wp = cfg80211_find_vendor_ie(
4364 WLAN_OUI_MICROSOFT,
4365 WLAN_OUI_TYPE_MICROSOFT_WMM,
4366 start, end - start);
4367 if (!wp)
4368 break;
4369 start = wp + wp[1] + 2;
4370 /* if this IE is too short, try the next */
4371 if (wp[1] <= 4)
4372 continue;
4373 /* if this IE is WMM params, we found what we wanted */
4374 if (wp[6] == 1)
4375 break;
4376 }
4377
4378 if (!wp || !ieee80211_usable_wmm_params(sdata, wp + 2,
4379 wp[1] - 2)) {
4380 assoc_data->wmm = false;
4381 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
4382 }
4383 rcu_read_unlock();
4384 }
4385
de5036aa
JB		 4386 /*
4387 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4388 * We still associate in non-HT mode (11a/b/g) if any one of these
4389 * ciphers is configured as pairwise.
4390 * We can set this to true for non-11n hardware, that'll be checked
4391 * separately along with the peer capabilities.
4392 */
1c4cb928 4393 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
77fdaa12
JB		 4394 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4395 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
1c4cb928 4396 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
a8243b72 4397 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
d545daba 4398 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
1c4cb928 4399 netdev_info(sdata->dev,
d545daba 4400 "disabling HT/VHT due to WEP/TKIP use\n");
1c4cb928
JB		 4401 }
4402 }
77fdaa12 4403
d545daba 4404 if (req->flags & ASSOC_REQ_DISABLE_HT) {
a8243b72 4405 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
d545daba
MP		 4406 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4407 }
ef96a842 4408
dd5ecfea
JB		 4409 if (req->flags & ASSOC_REQ_DISABLE_VHT)
4410 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4411
4e74bfdb
JB		 4412 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4413 sband = local->hw.wiphy->bands[req->bss->channel->band];
4414 if (!sband->ht_cap.ht_supported ||
095d81ce
JB		 4415 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4416 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
a8243b72 4417 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
095d81ce
JB		 4418 if (!bss->wmm_used &&
4419 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
1b49de26
JB		 4420 netdev_info(sdata->dev,
4421 "disabling HT as WMM/QoS is not supported by the AP\n");
1c4cb928 4422 }
4e74bfdb 4423
d545daba
MP		 4424 /* disable VHT if we don't support it or the AP doesn't use WMM */
4425 if (!sband->vht_cap.vht_supported ||
095d81ce
JB		 4426 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4427 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
d545daba 4428 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
095d81ce
JB		 4429 if (!bss->wmm_used &&
4430 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
1b49de26
JB		 4431 netdev_info(sdata->dev,
4432 "disabling VHT as WMM/QoS is not supported by the AP\n");
d545daba
MP		 4433 }
4434
ef96a842
BG		 4435 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4436 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4437 sizeof(ifmgd->ht_capa_mask));
4438
dd5ecfea
JB		 4439 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4440 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4441 sizeof(ifmgd->vht_capa_mask));
4442
77fdaa12 4443 if (req->ie && req->ie_len) {
66e67e41
JB		 4444 memcpy(assoc_data->ie, req->ie, req->ie_len);
4445 assoc_data->ie_len = req->ie_len;
4446 }
f679f65d 4447
66e67e41 4448 assoc_data->bss = req->bss;
f679f65d 4449
af6b6374
JB		 4450 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4451 if (ifmgd->powersave)
04ecd257 4452 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
af6b6374 4453 else
04ecd257 4454 sdata->smps_mode = IEEE80211_SMPS_OFF;
af6b6374 4455 } else
04ecd257 4456 sdata->smps_mode = ifmgd->req_smps;
af6b6374 4457
66e67e41 4458 assoc_data->capability = req->bss->capability;
66e67e41
JB		 4459 assoc_data->supp_rates = bss->supp_rates;
4460 assoc_data->supp_rates_len = bss->supp_rates_len;
9dde6423 4461
9caf0364 4462 rcu_read_lock();
9dde6423
JB		 4463 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4464 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4465 assoc_data->ap_ht_param =
4466 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4467 else
a8243b72 4468 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
b08fbbd8
JB		 4469 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4470 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4471 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4472 sizeof(struct ieee80211_vht_cap));
4473 else
4474 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
9caf0364 4475 rcu_read_unlock();
63f170e0 4476
ab13315a 4477 if (bss->wmm_used && bss->uapsd_supported &&
bb512ad0 4478 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
76f0303d 4479 assoc_data->uapsd = true;
ab13315a
KV		 4480 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4481 } else {
76f0303d 4482 assoc_data->uapsd = false;
ab13315a
KV		 4483 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4484 }
4485
77fdaa12 4486 if (req->prev_bssid)
66e67e41 4487 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12
JB		 4488
4489 if (req->use_mfp) {
4490 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4491 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4492 } else {
4493 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4494 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4495 }
4496
cd2f5dd7
AK		 4497 if (req->flags & ASSOC_REQ_USE_RRM)
4498 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
4499 else
4500 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
4501
77fdaa12
JB		 4502 if (req->crypto.control_port)
4503 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4504 else
4505 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4506
a621fa4d
JB		 4507 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4508 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
2475b1cc
MS		 4509 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
4510 sdata->vif.type);
a621fa4d 4511
66e67e41
JB		 4512 /* kick off associate process */
4513
4514 ifmgd->assoc_data = assoc_data;
826262c3 4515 ifmgd->dtim_period = 0;
989c6505 4516 ifmgd->have_beacon = false;
66e67e41 4517
a1cf775d
JB		 4518 err = ieee80211_prep_connection(sdata, req->bss, true);
4519 if (err)
4520 goto err_clear;
66e67e41 4521
c65dd147
EG		 4522 rcu_read_lock();
4523 beacon_ies = rcu_dereference(req->bss->beacon_ies);
826262c3 4524
c65dd147
EG		 4525 if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC &&
4526 !beacon_ies) {
4527 /*
4528 * Wait up to one beacon interval ...
4529 * should this be more if we miss one?
4530 */
4531 sdata_info(sdata, "waiting for beacon from %pM\n",
4532 ifmgd->bssid);
4533 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
89afe614 4534 assoc_data->timeout_started = true;
c65dd147
EG		 4535 assoc_data->need_beacon = true;
4536 } else if (beacon_ies) {
4537 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4538 beacon_ies->data,
4539 beacon_ies->len);
ef429dad
JB		 4540 u8 dtim_count = 0;
4541
c65dd147
EG		 4542 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4543 const struct ieee80211_tim_ie *tim;
4544 tim = (void *)(tim_ie + 2);
4545 ifmgd->dtim_period = tim->dtim_period;
ef429dad 4546 dtim_count = tim->dtim_count;
826262c3 4547 }
989c6505 4548 ifmgd->have_beacon = true;
66e67e41 4549 assoc_data->timeout = jiffies;
89afe614 4550 assoc_data->timeout_started = true;
ef429dad
JB		 4551
4552 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
4553 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4554 sdata->vif.bss_conf.sync_device_ts =
4555 bss->device_ts_beacon;
4556 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4557 }
c65dd147
EG		 4558 } else {
4559 assoc_data->timeout = jiffies;
89afe614 4560 assoc_data->timeout_started = true;
66e67e41 4561 }
c65dd147
EG		 4562 rcu_read_unlock();
4563
8d61ffa5 4564 run_again(sdata, assoc_data->timeout);
66e67e41 4565
fcff4f10
PS		 4566 if (bss->corrupt_data) {
4567 char *corrupt_type = "data";
4568 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4569 if (bss->corrupt_data &
4570 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4571 corrupt_type = "beacon and probe response";
4572 else
4573 corrupt_type = "beacon";
4574 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4575 corrupt_type = "probe response";
bdcbd8e0
JB		 4576 sdata_info(sdata, "associating with AP with corrupt %s\n",
4577 corrupt_type);
fcff4f10
PS		 4578 }
4579
8d61ffa5 4580 return 0;
66e67e41 4581 err_clear:
3d2abdfd
EP		 4582 memset(ifmgd->bssid, 0, ETH_ALEN);
4583 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 4584 ifmgd->assoc_data = NULL;
4585 err_free:
4586 kfree(assoc_data);
66e67e41 4587 return err;
f0706e82
JB		 4588}
4589
77fdaa12 4590int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
63c9c5e7 4591 struct cfg80211_deauth_request *req)
f0706e82 4592{
46900298 4593 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 4594 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
6863255b 4595 bool tx = !req->local_state_change;
f0706e82 4596
c9c3a060
JB		 4597 if (ifmgd->auth_data &&
4598 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
4599 sdata_info(sdata,
4600 "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
4601 req->bssid, req->reason_code,
4602 ieee80211_get_reason_code_string(req->reason_code));
0ff71613 4603
8c7d857c 4604 drv_mgd_prepare_tx(sdata->local, sdata);
37ad3888
JB		 4605 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4606 IEEE80211_STYPE_DEAUTH,
6863255b 4607 req->reason_code, tx,
37ad3888 4608 frame_buf);
86552017 4609 ieee80211_destroy_auth_data(sdata, false);
c9c3a060
JB		 4610 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4611 IEEE80211_DEAUTH_FRAME_LEN);
86552017 4612
c9c3a060 4613 return 0;
8c7d857c
EG		 4614 }
4615
86552017
JB		 4616 if (ifmgd->associated &&
4617 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
c9c3a060
JB		 4618 sdata_info(sdata,
4619 "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
4620 req->bssid, req->reason_code,
4621 ieee80211_get_reason_code_string(req->reason_code));
4622
86552017
JB		 4623 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4624 req->reason_code, tx, frame_buf);
6ff57cf8
JB		 4625 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4626 IEEE80211_DEAUTH_FRAME_LEN);
c9c3a060
JB		 4627 return 0;
4628 }
86552017 4629
c9c3a060 4630 return -ENOTCONN;
f0706e82 4631}
84363e6e 4632
77fdaa12 4633int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 4634 struct cfg80211_disassoc_request *req)
9c6bd790 4635{
77fdaa12 4636 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 4637 u8 bssid[ETH_ALEN];
6ae16775 4638 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
9c6bd790 4639
8d8b261a
JB		 4640 /*
4641 * cfg80211 should catch this ... but it's racy since
4642 * we can receive a disassoc frame, process it, hand it
4643 * to cfg80211 while that's in a locked section already
4644 * trying to tell us that the user wants to disconnect.
4645 */
8d61ffa5 4646 if (ifmgd->associated != req->bss)
77fdaa12 4647 return -ENOLINK;
77fdaa12 4648
bdcbd8e0 4649 sdata_info(sdata,
dfa1ad29
CO		 4650 "disassociating from %pM by local choice (Reason: %u=%s)\n",
4651 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
0ff71613 4652
e69e95db 4653 memcpy(bssid, req->bss->bssid, ETH_ALEN);
37ad3888
JB		 4654 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4655 req->reason_code, !req->local_state_change,
4656 frame_buf);
10f644a4 4657
6ff57cf8
JB		 4658 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4659 IEEE80211_DEAUTH_FRAME_LEN);
bc83b681 4660
10f644a4
JB		 4661 return 0;
4662}
026331c4 4663
afa762f6 4664void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
54e4ffb2
JB		 4665{
4666 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4667
49921859
BG		 4668 /*
4669 * Make sure some work items will not run after this,
4670 * they will not do anything but might not have been
4671 * cancelled when disconnecting.
4672 */
4673 cancel_work_sync(&ifmgd->monitor_work);
4674 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
4675 cancel_work_sync(&ifmgd->request_smps_work);
4676 cancel_work_sync(&ifmgd->csa_connection_drop_work);
4677 cancel_work_sync(&ifmgd->chswitch_work);
81dd2b88 4678 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
49921859 4679
8d61ffa5 4680 sdata_lock(sdata);
959867fa
JB		 4681 if (ifmgd->assoc_data) {
4682 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
54e4ffb2 4683 ieee80211_destroy_assoc_data(sdata, false);
959867fa
JB		 4684 cfg80211_assoc_timeout(sdata->dev, bss);
4685 }
54e4ffb2
JB		 4686 if (ifmgd->auth_data)
4687 ieee80211_destroy_auth_data(sdata, false);
4688 del_timer_sync(&ifmgd->timer);
8d61ffa5 4689 sdata_unlock(sdata);
54e4ffb2
JB		 4690}
4691
a97c13c3
JO		 4692void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
4693 enum nl80211_cqm_rssi_threshold_event rssi_event,
4694 gfp_t gfp)
4695{
4696 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4697
b5878a2d
JB		 4698 trace_api_cqm_rssi_notify(sdata, rssi_event);
4699
a97c13c3
JO		 4700 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
4701}
4702EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
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