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Merge remote-tracking branches 'asoc/topic/wm8753', 'asoc/topic/wm8770', 'asoc/topic...
[linux-block.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
e38a017b 9 * Copyright (C) 2015 - 2017 Intel Deutschland GmbH
f0706e82
JB		 10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License version 2 as
13 * published by the Free Software Foundation.
14 */
15
5b323edb 16#include <linux/delay.h>
f0706e82
JB		 17#include <linux/if_ether.h>
18#include <linux/skbuff.h>
f0706e82 19#include <linux/if_arp.h>
f0706e82 20#include <linux/etherdevice.h>
d9b93842 21#include <linux/moduleparam.h>
d0709a65 22#include <linux/rtnetlink.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"
39404fee 33#include "fils_aead.h"
f0706e82 34
1672c0e3 35#define IEEE80211_AUTH_TIMEOUT (HZ / 5)
cb236d2d 36#define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2)
1672c0e3
JB		 37#define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10)
38#define IEEE80211_AUTH_MAX_TRIES 3
39#define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
40#define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
cb236d2d 41#define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2)
1672c0e3
JB		 42#define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10)
43#define IEEE80211_ASSOC_MAX_TRIES 3
66e67e41 44
180205bd
BG		 45static int max_nullfunc_tries = 2;
46module_param(max_nullfunc_tries, int, 0644);
47MODULE_PARM_DESC(max_nullfunc_tries,
48 "Maximum nullfunc tx tries before disconnecting (reason 4).");
49
50static int max_probe_tries = 5;
51module_param(max_probe_tries, int, 0644);
52MODULE_PARM_DESC(max_probe_tries,
53 "Maximum probe tries before disconnecting (reason 4).");
b291ba11
JB		 54
55/*
7ccc8bd7
FF		 56 * Beacon loss timeout is calculated as N frames times the
57 * advertised beacon interval. This may need to be somewhat
58 * higher than what hardware might detect to account for
59 * delays in the host processing frames. But since we also
60 * probe on beacon miss before declaring the connection lost
61 * default to what we want.
b291ba11 62 */
59c1ec2b
BG		 63static int beacon_loss_count = 7;
64module_param(beacon_loss_count, int, 0644);
65MODULE_PARM_DESC(beacon_loss_count,
66 "Number of beacon intervals before we decide beacon was lost.");
7ccc8bd7 67
b291ba11
JB		 68/*
69 * Time the connection can be idle before we probe
70 * it to see if we can still talk to the AP.
71 */
d1c5091f 72#define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
b291ba11
JB		 73/*
74 * Time we wait for a probe response after sending
75 * a probe request because of beacon loss or for
76 * checking the connection still works.
77 */
180205bd
BG		 78static int probe_wait_ms = 500;
79module_param(probe_wait_ms, int, 0644);
80MODULE_PARM_DESC(probe_wait_ms,
81 "Maximum time(ms) to wait for probe response"
82 " before disconnecting (reason 4).");
f0706e82 83
391a200a
JM		 84/*
85 * How many Beacon frames need to have been used in average signal strength
86 * before starting to indicate signal change events.
87 */
88#define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
89
ca386f31
JB		 90/*
91 * We can have multiple work items (and connection probing)
92 * scheduling this timer, but we need to take care to only
93 * reschedule it when it should fire _earlier_ than it was
94 * asked for before, or if it's not pending right now. This
95 * function ensures that. Note that it then is required to
96 * run this function for all timeouts after the first one
97 * has happened -- the work that runs from this timer will
98 * do that.
99 */
8d61ffa5
JB		 100static void run_again(struct ieee80211_sub_if_data *sdata,
101 unsigned long timeout)
ca386f31 102{
8d61ffa5 103 sdata_assert_lock(sdata);
ca386f31 104
8d61ffa5
JB		 105 if (!timer_pending(&sdata->u.mgd.timer) ||
106 time_before(timeout, sdata->u.mgd.timer.expires))
107 mod_timer(&sdata->u.mgd.timer, timeout);
ca386f31
JB		 108}
109
d3a910a8 110void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
b291ba11 111{
c1288b12 112 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
b291ba11
JB		 113 return;
114
30686bf7 115 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
7eeff74c
JB		 116 return;
117
b291ba11 118 mod_timer(&sdata->u.mgd.bcn_mon_timer,
7ccc8bd7 119 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
b291ba11
JB		 120}
121
be099e82
LR		 122void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
123{
0c699c3a
LR		 124 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
125
b100e5d6 126 if (unlikely(!ifmgd->associated))
8628172f
SG		 127 return;
128
b100e5d6
JB		 129 if (ifmgd->probe_send_count)
130 ifmgd->probe_send_count = 0;
448cd2e2 131
30686bf7 132 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
be099e82
LR		 133 return;
134
b100e5d6 135 mod_timer(&ifmgd->conn_mon_timer,
be099e82
LR		 136 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
137}
138
5484e237 139static int ecw2cw(int ecw)
60f8b39c 140{
5484e237 141 return (1 << ecw) - 1;
60f8b39c
JB		 142}
143
6565ec9b
JB		 144static u32
145ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
146 struct ieee80211_supported_band *sband,
147 struct ieee80211_channel *channel,
148 const struct ieee80211_ht_operation *ht_oper,
149 const struct ieee80211_vht_operation *vht_oper,
5cdaed1e 150 struct cfg80211_chan_def *chandef, bool tracking)
6565ec9b 151{
5cdaed1e 152 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6565ec9b 153 struct cfg80211_chan_def vht_chandef;
179b8fc7 154 struct ieee80211_sta_ht_cap sta_ht_cap;
6565ec9b
JB		 155 u32 ht_cfreq, ret;
156
179b8fc7
CRI		 157 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
158 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
159
6565ec9b
JB		 160 chandef->chan = channel;
161 chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
162 chandef->center_freq1 = channel->center_freq;
163 chandef->center_freq2 = 0;
164
b1b1ae2c 165 if (!ht_oper || !sta_ht_cap.ht_supported) {
6565ec9b
JB		 166 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
167 goto out;
168 }
169
170 chandef->width = NL80211_CHAN_WIDTH_20;
171
172 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
173 channel->band);
174 /* check that channel matches the right operating channel */
5cdaed1e 175 if (!tracking && channel->center_freq != ht_cfreq) {
6565ec9b
JB		 176 /*
177 * It's possible that some APs are confused here;
178 * Netgear WNDR3700 sometimes reports 4 higher than
179 * the actual channel in association responses, but
180 * since we look at probe response/beacon data here
181 * it should be OK.
182 */
5cdaed1e
JB		 183 sdata_info(sdata,
184 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
185 channel->center_freq, ht_cfreq,
186 ht_oper->primary_chan, channel->band);
6565ec9b
JB		 187 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
188 goto out;
189 }
190
191 /* check 40 MHz support, if we have it */
179b8fc7 192 if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
8ac3c704 193 ieee80211_chandef_ht_oper(ht_oper, chandef);
6565ec9b
JB		 194 } else {
195 /* 40 MHz (and 80 MHz) must be supported for VHT */
196 ret = IEEE80211_STA_DISABLE_VHT;
85220d71
JB		 197 /* also mark 40 MHz disabled */
198 ret |= IEEE80211_STA_DISABLE_40MHZ;
6565ec9b
JB		 199 goto out;
200 }
201
202 if (!vht_oper || !sband->vht_cap.vht_supported) {
203 ret = IEEE80211_STA_DISABLE_VHT;
204 goto out;
205 }
206
8ac3c704
JB		 207 vht_chandef = *chandef;
208 if (!ieee80211_chandef_vht_oper(vht_oper, &vht_chandef)) {
5cdaed1e 209 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
30eb1dc2 210 sdata_info(sdata,
8ac3c704 211 "AP VHT information is invalid, disable VHT\n");
6565ec9b
JB		 212 ret = IEEE80211_STA_DISABLE_VHT;
213 goto out;
214 }
215
216 if (!cfg80211_chandef_valid(&vht_chandef)) {
5cdaed1e 217 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
30eb1dc2
JB		 218 sdata_info(sdata,
219 "AP VHT information is invalid, disable VHT\n");
6565ec9b
JB		 220 ret = IEEE80211_STA_DISABLE_VHT;
221 goto out;
222 }
223
224 if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
225 ret = 0;
226 goto out;
227 }
228
229 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
5cdaed1e 230 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
30eb1dc2
JB		 231 sdata_info(sdata,
232 "AP VHT information doesn't match HT, disable VHT\n");
6565ec9b
JB		 233 ret = IEEE80211_STA_DISABLE_VHT;
234 goto out;
235 }
236
237 *chandef = vht_chandef;
238
239 ret = 0;
240
241out:
963a1852
JB		 242 /*
243 * When tracking the current AP, don't do any further checks if the
244 * new chandef is identical to the one we're currently using for the
245 * connection. This keeps us from playing ping-pong with regulatory,
246 * without it the following can happen (for example):
247 * - connect to an AP with 80 MHz, world regdom allows 80 MHz
248 * - AP advertises regdom US
249 * - CRDA loads regdom US with 80 MHz prohibited (old database)
250 * - the code below detects an unsupported channel, downgrades, and
251 * we disconnect from the AP in the caller
252 * - disconnect causes CRDA to reload world regdomain and the game
253 * starts anew.
254 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
255 *
256 * It seems possible that there are still scenarios with CSA or real
257 * bandwidth changes where a this could happen, but those cases are
258 * less common and wouldn't completely prevent using the AP.
259 */
260 if (tracking &&
261 cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef))
262 return ret;
263
586e01ed
JB		 264 /* don't print the message below for VHT mismatch if VHT is disabled */
265 if (ret & IEEE80211_STA_DISABLE_VHT)
266 vht_chandef = *chandef;
267
ddfe49b4
JB		 268 /*
269 * Ignore the DISABLED flag when we're already connected and only
270 * tracking the APs beacon for bandwidth changes - otherwise we
271 * might get disconnected here if we connect to an AP, update our
272 * regulatory information based on the AP's country IE and the
273 * information we have is wrong/outdated and disables the channel
274 * that we're actually using for the connection to the AP.
275 */
6565ec9b 276 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
ddfe49b4
JB		 277 tracking ? 0 :
278 IEEE80211_CHAN_DISABLED)) {
6565ec9b
JB		 279 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
280 ret = IEEE80211_STA_DISABLE_HT |
281 IEEE80211_STA_DISABLE_VHT;
b56e4b85 282 break;
6565ec9b
JB		 283 }
284
e6b7cde4 285 ret |= ieee80211_chandef_downgrade(chandef);
6565ec9b
JB		 286 }
287
5cdaed1e 288 if (chandef->width != vht_chandef.width && !tracking)
6565ec9b
JB		 289 sdata_info(sdata,
290 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
291
292 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
293 return ret;
294}
295
30eb1dc2
JB		 296static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
297 struct sta_info *sta,
53b954ee 298 const struct ieee80211_ht_cap *ht_cap,
30eb1dc2
JB		 299 const struct ieee80211_ht_operation *ht_oper,
300 const struct ieee80211_vht_operation *vht_oper,
301 const u8 *bssid, u32 *changed)
d5522e03
JB		 302{
303 struct ieee80211_local *local = sdata->local;
30eb1dc2 304 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d5522e03 305 struct ieee80211_supported_band *sband;
55de908a 306 struct ieee80211_channel *chan;
30eb1dc2 307 struct cfg80211_chan_def chandef;
9ed6bcce 308 u16 ht_opmode;
30eb1dc2
JB		 309 u32 flags;
310 enum ieee80211_sta_rx_bandwidth new_sta_bw;
311 int ret;
d5522e03 312
30eb1dc2
JB		 313 /* if HT was/is disabled, don't track any bandwidth changes */
314 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
1128958d
JB		 315 return 0;
316
30eb1dc2
JB		 317 /* don't check VHT if we associated as non-VHT station */
318 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
319 vht_oper = NULL;
320
321 if (WARN_ON_ONCE(!sta))
322 return -EINVAL;
323
017b45bb
AA		 324 /*
325 * if bss configuration changed store the new one -
326 * this may be applicable even if channel is identical
327 */
328 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
329 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
330 *changed |= BSS_CHANGED_HT;
331 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
332 }
333
f2d9330e 334 chan = sdata->vif.bss_conf.chandef.chan;
55de908a 335 sband = local->hw.wiphy->bands[chan->band];
d5522e03 336
30eb1dc2 337 /* calculate new channel (type) based on HT/VHT operation IEs */
53b954ee 338 flags = ieee80211_determine_chantype(sdata, sband, chan,
b1b1ae2c 339 ht_oper, vht_oper,
53b954ee 340 &chandef, true);
30eb1dc2
JB		 341
342 /*
343 * Downgrade the new channel if we associated with restricted
344 * capabilities. For example, if we associated as a 20 MHz STA
345 * to a 40 MHz AP (due to regulatory, capabilities or config
346 * reasons) then switching to a 40 MHz channel now won't do us
347 * any good -- we couldn't use it with the AP.
348 */
349 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
350 chandef.width == NL80211_CHAN_WIDTH_80P80)
e6b7cde4 351 flags |= ieee80211_chandef_downgrade(&chandef);
30eb1dc2
JB		 352 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
353 chandef.width == NL80211_CHAN_WIDTH_160)
e6b7cde4 354 flags |= ieee80211_chandef_downgrade(&chandef);
30eb1dc2
JB		 355 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
356 chandef.width > NL80211_CHAN_WIDTH_20)
e6b7cde4 357 flags |= ieee80211_chandef_downgrade(&chandef);
30eb1dc2
JB		 358
359 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
360 return 0;
361
362 sdata_info(sdata,
363 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
364 ifmgd->bssid, chandef.chan->center_freq, chandef.width,
365 chandef.center_freq1, chandef.center_freq2);
366
367 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
368 IEEE80211_STA_DISABLE_VHT |
369 IEEE80211_STA_DISABLE_40MHZ |
370 IEEE80211_STA_DISABLE_80P80MHZ |
371 IEEE80211_STA_DISABLE_160MHZ)) ||
372 !cfg80211_chandef_valid(&chandef)) {
373 sdata_info(sdata,
374 "AP %pM changed bandwidth in a way we can't support - disconnect\n",
375 ifmgd->bssid);
376 return -EINVAL;
377 }
378
379 switch (chandef.width) {
380 case NL80211_CHAN_WIDTH_20_NOHT:
381 case NL80211_CHAN_WIDTH_20:
382 new_sta_bw = IEEE80211_STA_RX_BW_20;
383 break;
4bf88530 384 case NL80211_CHAN_WIDTH_40:
30eb1dc2 385 new_sta_bw = IEEE80211_STA_RX_BW_40;
64f68e5d 386 break;
30eb1dc2
JB		 387 case NL80211_CHAN_WIDTH_80:
388 new_sta_bw = IEEE80211_STA_RX_BW_80;
389 break;
390 case NL80211_CHAN_WIDTH_80P80:
391 case NL80211_CHAN_WIDTH_160:
392 new_sta_bw = IEEE80211_STA_RX_BW_160;
64f68e5d 393 break;
30eb1dc2
JB		 394 default:
395 return -EINVAL;
64f68e5d 396 }
d5522e03 397
30eb1dc2
JB		 398 if (new_sta_bw > sta->cur_max_bandwidth)
399 new_sta_bw = sta->cur_max_bandwidth;
64f68e5d 400
30eb1dc2
JB		 401 if (new_sta_bw < sta->sta.bandwidth) {
402 sta->sta.bandwidth = new_sta_bw;
403 rate_control_rate_update(local, sband, sta,
404 IEEE80211_RC_BW_CHANGED);
405 }
64f68e5d 406
30eb1dc2
JB		 407 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
408 if (ret) {
409 sdata_info(sdata,
410 "AP %pM changed bandwidth to incompatible one - disconnect\n",
411 ifmgd->bssid);
412 return ret;
413 }
7cc44ed4 414
30eb1dc2
JB		 415 if (new_sta_bw > sta->sta.bandwidth) {
416 sta->sta.bandwidth = new_sta_bw;
417 rate_control_rate_update(local, sband, sta,
418 IEEE80211_RC_BW_CHANGED);
0aaffa9b 419 }
d5522e03 420
30eb1dc2 421 return 0;
d5522e03
JB		 422}
423
9c6bd790
JB		 424/* frame sending functions */
425
66e67e41 426static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
9dde6423 427 struct sk_buff *skb, u8 ap_ht_param,
66e67e41
JB		 428 struct ieee80211_supported_band *sband,
429 struct ieee80211_channel *channel,
430 enum ieee80211_smps_mode smps)
431{
66e67e41
JB		 432 u8 *pos;
433 u32 flags = channel->flags;
434 u16 cap;
435 struct ieee80211_sta_ht_cap ht_cap;
436
437 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
438
66e67e41
JB		 439 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
440 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
441
66e67e41
JB		 442 /* determine capability flags */
443 cap = ht_cap.cap;
444
9dde6423 445 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
66e67e41
JB		 446 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
447 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
448 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
449 cap &= ~IEEE80211_HT_CAP_SGI_40;
450 }
451 break;
452 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
453 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
454 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
455 cap &= ~IEEE80211_HT_CAP_SGI_40;
456 }
457 break;
458 }
459
24398e39
JB		 460 /*
461 * If 40 MHz was disabled associate as though we weren't
462 * capable of 40 MHz -- some broken APs will never fall
463 * back to trying to transmit in 20 MHz.
464 */
465 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
466 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
467 cap &= ~IEEE80211_HT_CAP_SGI_40;
468 }
469
66e67e41
JB		 470 /* set SM PS mode properly */
471 cap &= ~IEEE80211_HT_CAP_SM_PS;
472 switch (smps) {
473 case IEEE80211_SMPS_AUTOMATIC:
474 case IEEE80211_SMPS_NUM_MODES:
475 WARN_ON(1);
02049ce2 476 /* fall through */
66e67e41
JB		 477 case IEEE80211_SMPS_OFF:
478 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
479 IEEE80211_HT_CAP_SM_PS_SHIFT;
480 break;
481 case IEEE80211_SMPS_STATIC:
482 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
483 IEEE80211_HT_CAP_SM_PS_SHIFT;
484 break;
485 case IEEE80211_SMPS_DYNAMIC:
486 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
487 IEEE80211_HT_CAP_SM_PS_SHIFT;
488 break;
489 }
490
491 /* reserve and fill IE */
492 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
493 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
494}
495
322cd406
SS		 496/* This function determines vht capability flags for the association
497 * and builds the IE.
498 * Note - the function may set the owner of the MU-MIMO capability
499 */
d545daba
MP		 500static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
501 struct sk_buff *skb,
b08fbbd8
JB		 502 struct ieee80211_supported_band *sband,
503 struct ieee80211_vht_cap *ap_vht_cap)
d545daba 504{
322cd406 505 struct ieee80211_local *local = sdata->local;
d545daba
MP		 506 u8 *pos;
507 u32 cap;
508 struct ieee80211_sta_vht_cap vht_cap;
c1cf6d4e 509 u32 mask, ap_bf_sts, our_bf_sts;
d545daba
MP		 510
511 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
512
513 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
dd5ecfea 514 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
d545daba
MP		 515
516 /* determine capability flags */
517 cap = vht_cap.cap;
518
f2d9d270 519 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
575f0530
JB		 520 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
521
522 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
523 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ ||
524 bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
525 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
f2d9d270
JB		 526 }
527
528 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
529 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
575f0530 530 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
f2d9d270
JB		 531 }
532
b08fbbd8
JB		 533 /*
534 * Some APs apparently get confused if our capabilities are better
535 * than theirs, so restrict what we advertise in the assoc request.
536 */
537 if (!(ap_vht_cap->vht_cap_info &
538 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
322cd406
SS		 539 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
540 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE);
541 else if (!(ap_vht_cap->vht_cap_info &
542 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE)))
543 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
544
545 /*
546 * If some other vif is using the MU-MIMO capablity we cannot associate
547 * using MU-MIMO - this will lead to contradictions in the group-id
548 * mechanism.
549 * Ownership is defined since association request, in order to avoid
550 * simultaneous associations with MU-MIMO.
551 */
552 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) {
553 bool disable_mu_mimo = false;
554 struct ieee80211_sub_if_data *other;
555
556 list_for_each_entry_rcu(other, &local->interfaces, list) {
b5a33d52 557 if (other->vif.mu_mimo_owner) {
322cd406
SS		 558 disable_mu_mimo = true;
559 break;
560 }
561 }
562 if (disable_mu_mimo)
563 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
564 else
b5a33d52 565 sdata->vif.mu_mimo_owner = true;
322cd406 566 }
b08fbbd8 567
c1cf6d4e
ES		 568 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK;
569
570 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask;
571 our_bf_sts = cap & mask;
572
573 if (ap_bf_sts < our_bf_sts) {
574 cap &= ~mask;
575 cap |= ap_bf_sts;
576 }
577
d545daba 578 /* reserve and fill IE */
d4950281 579 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
d545daba
MP		 580 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
581}
582
66e67e41
JB		 583static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
584{
585 struct ieee80211_local *local = sdata->local;
586 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
587 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
588 struct sk_buff *skb;
589 struct ieee80211_mgmt *mgmt;
590 u8 *pos, qos_info;
591 size_t offset = 0, noffset;
2103dec1 592 int i, count, rates_len, supp_rates_len, shift;
66e67e41
JB		 593 u16 capab;
594 struct ieee80211_supported_band *sband;
55de908a
JB		 595 struct ieee80211_chanctx_conf *chanctx_conf;
596 struct ieee80211_channel *chan;
44f6d42c 597 u32 rates = 0;
66e67e41 598
8d61ffa5 599 sdata_assert_lock(sdata);
66e67e41 600
55de908a
JB		 601 rcu_read_lock();
602 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
603 if (WARN_ON(!chanctx_conf)) {
604 rcu_read_unlock();
605 return;
606 }
4bf88530 607 chan = chanctx_conf->def.chan;
55de908a
JB		 608 rcu_read_unlock();
609 sband = local->hw.wiphy->bands[chan->band];
2103dec1 610 shift = ieee80211_vif_get_shift(&sdata->vif);
66e67e41
JB		 611
612 if (assoc_data->supp_rates_len) {
613 /*
614 * Get all rates supported by the device and the AP as
615 * some APs don't like getting a superset of their rates
616 * in the association request (e.g. D-Link DAP 1353 in
617 * b-only mode)...
618 */
2103dec1
SW		 619 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
620 assoc_data->supp_rates,
621 assoc_data->supp_rates_len,
622 &rates);
66e67e41
JB		 623 } else {
624 /*
625 * In case AP not provide any supported rates information
626 * before association, we send information element(s) with
627 * all rates that we support.
628 */
2103dec1
SW		 629 rates_len = 0;
630 for (i = 0; i < sband->n_bitrates; i++) {
2103dec1
SW		 631 rates |= BIT(i);
632 rates_len++;
633 }
66e67e41
JB		 634 }
635
636 skb = alloc_skb(local->hw.extra_tx_headroom +
637 sizeof(*mgmt) + /* bit too much but doesn't matter */
638 2 + assoc_data->ssid_len + /* SSID */
639 4 + rates_len + /* (extended) rates */
640 4 + /* power capability */
641 2 + 2 * sband->n_channels + /* supported channels */
642 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
d4950281 643 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
66e67e41 644 assoc_data->ie_len + /* extra IEs */
39404fee 645 (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) +
66e67e41
JB		 646 9, /* WMM */
647 GFP_KERNEL);
648 if (!skb)
649 return;
650
651 skb_reserve(skb, local->hw.extra_tx_headroom);
652
653 capab = WLAN_CAPABILITY_ESS;
654
57fbcce3 655 if (sband->band == NL80211_BAND_2GHZ) {
ea1b2b45
JB		 656 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
657 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
66e67e41
JB		 658 }
659
660 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
661 capab |= WLAN_CAPABILITY_PRIVACY;
662
663 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
30686bf7 664 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT))
66e67e41
JB		 665 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
666
cd2f5dd7
AK		 667 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM)
668 capab |= WLAN_CAPABILITY_RADIO_MEASURE;
669
b080db58 670 mgmt = skb_put_zero(skb, 24);
66e67e41
JB		 671 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
672 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
673 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
674
675 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
676 skb_put(skb, 10);
677 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
678 IEEE80211_STYPE_REASSOC_REQ);
679 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
680 mgmt->u.reassoc_req.listen_interval =
681 cpu_to_le16(local->hw.conf.listen_interval);
682 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
683 ETH_ALEN);
684 } else {
685 skb_put(skb, 4);
686 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
687 IEEE80211_STYPE_ASSOC_REQ);
688 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
689 mgmt->u.assoc_req.listen_interval =
690 cpu_to_le16(local->hw.conf.listen_interval);
691 }
692
693 /* SSID */
694 pos = skb_put(skb, 2 + assoc_data->ssid_len);
695 *pos++ = WLAN_EID_SSID;
696 *pos++ = assoc_data->ssid_len;
697 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
698
699 /* add all rates which were marked to be used above */
700 supp_rates_len = rates_len;
701 if (supp_rates_len > 8)
702 supp_rates_len = 8;
703
704 pos = skb_put(skb, supp_rates_len + 2);
705 *pos++ = WLAN_EID_SUPP_RATES;
706 *pos++ = supp_rates_len;
707
708 count = 0;
709 for (i = 0; i < sband->n_bitrates; i++) {
710 if (BIT(i) & rates) {
2103dec1
SW		 711 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
712 5 * (1 << shift));
713 *pos++ = (u8) rate;
66e67e41
JB		 714 if (++count == 8)
715 break;
716 }
717 }
718
719 if (rates_len > count) {
720 pos = skb_put(skb, rates_len - count + 2);
721 *pos++ = WLAN_EID_EXT_SUPP_RATES;
722 *pos++ = rates_len - count;
723
724 for (i++; i < sband->n_bitrates; i++) {
725 if (BIT(i) & rates) {
2103dec1
SW		 726 int rate;
727 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
728 5 * (1 << shift));
729 *pos++ = (u8) rate;
66e67e41
JB		 730 }
731 }
732 }
733
cd2f5dd7
AK		 734 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT ||
735 capab & WLAN_CAPABILITY_RADIO_MEASURE) {
66e67e41
JB		 736 pos = skb_put(skb, 4);
737 *pos++ = WLAN_EID_PWR_CAPABILITY;
738 *pos++ = 2;
739 *pos++ = 0; /* min tx power */
0430c883
SW		 740 /* max tx power */
741 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
cd2f5dd7 742 }
66e67e41 743
cd2f5dd7 744 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
66e67e41
JB		 745 /* TODO: get this in reg domain format */
746 pos = skb_put(skb, 2 * sband->n_channels + 2);
747 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
748 *pos++ = 2 * sband->n_channels;
749 for (i = 0; i < sband->n_channels; i++) {
750 *pos++ = ieee80211_frequency_to_channel(
751 sband->channels[i].center_freq);
752 *pos++ = 1; /* one channel in the subband*/
753 }
754 }
755
756 /* if present, add any custom IEs that go before HT */
b3f51e94 757 if (assoc_data->ie_len) {
66e67e41
JB		 758 static const u8 before_ht[] = {
759 WLAN_EID_SSID,
760 WLAN_EID_SUPP_RATES,
761 WLAN_EID_EXT_SUPP_RATES,
762 WLAN_EID_PWR_CAPABILITY,
763 WLAN_EID_SUPPORTED_CHANNELS,
764 WLAN_EID_RSN,
765 WLAN_EID_QOS_CAPA,
766 WLAN_EID_RRM_ENABLED_CAPABILITIES,
767 WLAN_EID_MOBILITY_DOMAIN,
8ed28747
JB		 768 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */
769 WLAN_EID_RIC_DATA, /* reassoc only */
66e67e41
JB		 770 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
771 };
8ed28747
JB		 772 static const u8 after_ric[] = {
773 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
774 WLAN_EID_HT_CAPABILITY,
775 WLAN_EID_BSS_COEX_2040,
a7f26d80 776 /* luckily this is almost always there */
8ed28747
JB		 777 WLAN_EID_EXT_CAPABILITY,
778 WLAN_EID_QOS_TRAFFIC_CAPA,
779 WLAN_EID_TIM_BCAST_REQ,
780 WLAN_EID_INTERWORKING,
a7f26d80 781 /* 60 GHz (Multi-band, DMG, MMS) can't happen */
8ed28747
JB		 782 WLAN_EID_VHT_CAPABILITY,
783 WLAN_EID_OPMODE_NOTIF,
784 };
785
786 noffset = ieee80211_ie_split_ric(assoc_data->ie,
787 assoc_data->ie_len,
788 before_ht,
789 ARRAY_SIZE(before_ht),
790 after_ric,
791 ARRAY_SIZE(after_ric),
792 offset);
b952f4df 793 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
66e67e41
JB		 794 offset = noffset;
795 }
796
f2d9d270
JB		 797 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
798 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
799 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
800
a8243b72 801 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
9dde6423 802 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
04ecd257 803 sband, chan, sdata->smps_mode);
66e67e41 804
3de3802c
JB		 805 /* if present, add any custom IEs that go before VHT */
806 if (assoc_data->ie_len) {
807 static const u8 before_vht[] = {
a7f26d80
JB		 808 /*
809 * no need to list the ones split off before HT
810 * or generated here
811 */
3de3802c
JB		 812 WLAN_EID_BSS_COEX_2040,
813 WLAN_EID_EXT_CAPABILITY,
814 WLAN_EID_QOS_TRAFFIC_CAPA,
815 WLAN_EID_TIM_BCAST_REQ,
816 WLAN_EID_INTERWORKING,
a7f26d80 817 /* 60 GHz (Multi-band, DMG, MMS) can't happen */
3de3802c 818 };
8ed28747
JB		 819
820 /* RIC already taken above, so no need to handle here anymore */
3de3802c
JB		 821 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
822 before_vht, ARRAY_SIZE(before_vht),
823 offset);
b952f4df 824 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
3de3802c
JB		 825 offset = noffset;
826 }
827
d545daba 828 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
b08fbbd8
JB		 829 ieee80211_add_vht_ie(sdata, skb, sband,
830 &assoc_data->ap_vht_cap);
d545daba 831
66e67e41 832 /* if present, add any custom non-vendor IEs that go after HT */
b3f51e94 833 if (assoc_data->ie_len) {
66e67e41
JB		 834 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
835 assoc_data->ie_len,
836 offset);
b952f4df 837 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
66e67e41
JB		 838 offset = noffset;
839 }
840
76f0303d
JB		 841 if (assoc_data->wmm) {
842 if (assoc_data->uapsd) {
dc41e4d4
EP		 843 qos_info = ifmgd->uapsd_queues;
844 qos_info |= (ifmgd->uapsd_max_sp_len <<
66e67e41
JB		 845 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
846 } else {
847 qos_info = 0;
848 }
849
40b861a0 850 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
66e67e41
JB		 851 }
852
853 /* add any remaining custom (i.e. vendor specific here) IEs */
b3f51e94 854 if (assoc_data->ie_len) {
66e67e41 855 noffset = assoc_data->ie_len;
b952f4df 856 skb_put_data(skb, assoc_data->ie + offset, noffset - offset);
66e67e41
JB		 857 }
858
39404fee
JM		 859 if (assoc_data->fils_kek_len &&
860 fils_encrypt_assoc_req(skb, assoc_data) < 0) {
861 dev_kfree_skb(skb);
862 return;
863 }
864
a1845fc7
JB		 865 drv_mgd_prepare_tx(local, sdata);
866
66e67e41 867 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
30686bf7 868 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1672c0e3
JB		 869 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
870 IEEE80211_TX_INTFL_MLME_CONN_TX;
66e67e41
JB		 871 ieee80211_tx_skb(sdata, skb);
872}
873
572e0012
KV		 874void ieee80211_send_pspoll(struct ieee80211_local *local,
875 struct ieee80211_sub_if_data *sdata)
876{
572e0012
KV		 877 struct ieee80211_pspoll *pspoll;
878 struct sk_buff *skb;
572e0012 879
d8cd189e
KV		 880 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
881 if (!skb)
572e0012 882 return;
572e0012 883
d8cd189e
KV		 884 pspoll = (struct ieee80211_pspoll *) skb->data;
885 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
572e0012 886
62ae67be
JB		 887 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
888 ieee80211_tx_skb(sdata, skb);
572e0012
KV		 889}
890
965bedad
JB		 891void ieee80211_send_nullfunc(struct ieee80211_local *local,
892 struct ieee80211_sub_if_data *sdata,
076cdcb1 893 bool powersave)
965bedad
JB		 894{
895 struct sk_buff *skb;
d8cd189e 896 struct ieee80211_hdr_3addr *nullfunc;
b6f35301 897 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
965bedad 898
7c181f4f
BCD		 899 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif,
900 !ieee80211_hw_check(&local->hw, DOESNT_SUPPORT_QOS_NDP));
d8cd189e 901 if (!skb)
965bedad 902 return;
965bedad 903
d8cd189e 904 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
965bedad 905 if (powersave)
d8cd189e 906 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
965bedad 907
6c17b77b
SF		 908 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
909 IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
ff40b425 910
30686bf7 911 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
ff40b425
PF		 912 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
913
392b9ffb 914 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
b6f35301
RM		 915 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
916
62ae67be 917 ieee80211_tx_skb(sdata, skb);
965bedad
JB		 918}
919
d524215f
FF		 920static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
921 struct ieee80211_sub_if_data *sdata)
922{
923 struct sk_buff *skb;
924 struct ieee80211_hdr *nullfunc;
925 __le16 fc;
926
927 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
928 return;
929
930 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
d15b8459 931 if (!skb)
d524215f 932 return;
d15b8459 933
d524215f
FF		 934 skb_reserve(skb, local->hw.extra_tx_headroom);
935
b080db58 936 nullfunc = skb_put_zero(skb, 30);
d524215f
FF		 937 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
938 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
939 nullfunc->frame_control = fc;
940 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
941 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
942 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
943 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
944
945 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
946 ieee80211_tx_skb(sdata, skb);
947}
948
cc32abd4
JB		 949/* spectrum management related things */
950static void ieee80211_chswitch_work(struct work_struct *work)
951{
952 struct ieee80211_sub_if_data *sdata =
953 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
675a0b04 954 struct ieee80211_local *local = sdata->local;
cc32abd4 955 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
7578d575 956 int ret;
cc32abd4 957
9607e6b6 958 if (!ieee80211_sdata_running(sdata))
cc32abd4
JB		 959 return;
960
8d61ffa5 961 sdata_lock(sdata);
4c3ebc56
MK		 962 mutex_lock(&local->mtx);
963 mutex_lock(&local->chanctx_mtx);
964
77fdaa12
JB		 965 if (!ifmgd->associated)
966 goto out;
cc32abd4 967
4c3ebc56
MK		 968 if (!sdata->vif.csa_active)
969 goto out;
970
971 /*
972 * using reservation isn't immediate as it may be deferred until later
973 * with multi-vif. once reservation is complete it will re-schedule the
974 * work with no reserved_chanctx so verify chandef to check if it
975 * completed successfully
976 */
977
978 if (sdata->reserved_chanctx) {
979 /*
980 * with multi-vif csa driver may call ieee80211_csa_finish()
981 * many times while waiting for other interfaces to use their
982 * reservations
983 */
984 if (sdata->reserved_ready)
985 goto out;
986
987 ret = ieee80211_vif_use_reserved_context(sdata);
988 if (ret) {
989 sdata_info(sdata,
990 "failed to use reserved channel context, disconnecting (err=%d)\n",
991 ret);
992 ieee80211_queue_work(&sdata->local->hw,
993 &ifmgd->csa_connection_drop_work);
994 goto out;
995 }
996
997 goto out;
998 }
999
1000 if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
1001 &sdata->csa_chandef)) {
7578d575 1002 sdata_info(sdata,
4c3ebc56 1003 "failed to finalize channel switch, disconnecting\n");
7578d575
AN		 1004 ieee80211_queue_work(&sdata->local->hw,
1005 &ifmgd->csa_connection_drop_work);
1006 goto out;
1007 }
675a0b04 1008
cc32abd4 1009 /* XXX: shouldn't really modify cfg80211-owned data! */
33787fc4 1010 ifmgd->associated->channel = sdata->csa_chandef.chan;
cc32abd4 1011
0c21e632
LC		 1012 ifmgd->csa_waiting_bcn = true;
1013
1014 ieee80211_sta_reset_beacon_monitor(sdata);
1015 ieee80211_sta_reset_conn_monitor(sdata);
1016
1017out:
1018 mutex_unlock(&local->chanctx_mtx);
1019 mutex_unlock(&local->mtx);
1020 sdata_unlock(sdata);
1021}
1022
1023static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata)
1024{
1025 struct ieee80211_local *local = sdata->local;
1026 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1027 int ret;
1028
1029 sdata_assert_lock(sdata);
1030
1031 WARN_ON(!sdata->vif.csa_active);
4c3ebc56 1032
a46992b4
LC		 1033 if (sdata->csa_block_tx) {
1034 ieee80211_wake_vif_queues(local, sdata,
1035 IEEE80211_QUEUE_STOP_REASON_CSA);
1036 sdata->csa_block_tx = false;
1037 }
7578d575 1038
0c21e632
LC		 1039 sdata->vif.csa_active = false;
1040 ifmgd->csa_waiting_bcn = false;
1041
f1d65583
LC		 1042 ret = drv_post_channel_switch(sdata);
1043 if (ret) {
1044 sdata_info(sdata,
1045 "driver post channel switch failed, disconnecting\n");
1046 ieee80211_queue_work(&local->hw,
1047 &ifmgd->csa_connection_drop_work);
0c21e632 1048 return;
f1d65583 1049 }
688b1ecf
LC		 1050
1051 cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef);
cc32abd4
JB		 1052}
1053
5ce6e438
JB		 1054void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1055{
55de908a
JB		 1056 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1057 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5ce6e438
JB		 1058
1059 trace_api_chswitch_done(sdata, success);
1060 if (!success) {
882a7c69
JB		 1061 sdata_info(sdata,
1062 "driver channel switch failed, disconnecting\n");
1063 ieee80211_queue_work(&sdata->local->hw,
1064 &ifmgd->csa_connection_drop_work);
1065 } else {
1066 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
5ce6e438 1067 }
5ce6e438
JB		 1068}
1069EXPORT_SYMBOL(ieee80211_chswitch_done);
1070
34f11cd3 1071static void ieee80211_chswitch_timer(struct timer_list *t)
cc32abd4
JB		 1072{
1073 struct ieee80211_sub_if_data *sdata =
34f11cd3 1074 from_timer(sdata, t, u.mgd.chswitch_timer);
5bb644a0 1075
9b7d72c1 1076 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
cc32abd4
JB		 1077}
1078
37799e52 1079static void
4a3cb702 1080ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
2ba45384
LC		 1081 u64 timestamp, u32 device_timestamp,
1082 struct ieee802_11_elems *elems,
04a161f4 1083 bool beacon)
cc32abd4 1084{
b4f286a1 1085 struct ieee80211_local *local = sdata->local;
cc32abd4 1086 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
37799e52 1087 struct cfg80211_bss *cbss = ifmgd->associated;
4c3ebc56 1088 struct ieee80211_chanctx_conf *conf;
55de908a 1089 struct ieee80211_chanctx *chanctx;
57fbcce3 1090 enum nl80211_band current_band;
c0f17eb9 1091 struct ieee80211_csa_ie csa_ie;
6d027bcc 1092 struct ieee80211_channel_switch ch_switch;
e6b7cde4 1093 int res;
cc32abd4 1094
8d61ffa5 1095 sdata_assert_lock(sdata);
77fdaa12 1096
37799e52 1097 if (!cbss)
cc32abd4
JB		 1098 return;
1099
b4f286a1 1100 if (local->scanning)
cc32abd4
JB		 1101 return;
1102
37799e52 1103 /* disregard subsequent announcements if we are already processing */
3e2a0226 1104 if (sdata->vif.csa_active)
cc32abd4
JB		 1105 return;
1106
e6b7cde4 1107 current_band = cbss->channel->band;
84469a45 1108 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band,
e6b7cde4 1109 ifmgd->flags,
c0f17eb9 1110 ifmgd->associated->bssid, &csa_ie);
e6b7cde4 1111 if (res < 0)
b4f286a1 1112 ieee80211_queue_work(&local->hw,
882a7c69 1113 &ifmgd->csa_connection_drop_work);
e6b7cde4 1114 if (res)
cc32abd4 1115 return;
cd64f2a9 1116
c0f17eb9 1117 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
85220d71
JB		 1118 IEEE80211_CHAN_DISABLED)) {
1119 sdata_info(sdata,
1120 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
e6b7cde4 1121 ifmgd->associated->bssid,
c0f17eb9
CYY		 1122 csa_ie.chandef.chan->center_freq,
1123 csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1124 csa_ie.chandef.center_freq2);
85220d71
JB		 1125 ieee80211_queue_work(&local->hw,
1126 &ifmgd->csa_connection_drop_work);
1127 return;
1128 }
1129
f84eaa10
JB		 1130 if (cfg80211_chandef_identical(&csa_ie.chandef,
1131 &sdata->vif.bss_conf.chandef)) {
1132 if (ifmgd->csa_ignored_same_chan)
1133 return;
1134 sdata_info(sdata,
1135 "AP %pM tries to chanswitch to same channel, ignore\n",
1136 ifmgd->associated->bssid);
1137 ifmgd->csa_ignored_same_chan = true;
1138 return;
1139 }
1140
c5a71688
AN		 1141 /*
1142 * Drop all TDLS peers - either we disconnect or move to a different
1143 * channel from this point on. There's no telling what our peer will do.
1144 * The TDLS WIDER_BW scenario is also problematic, as peers might now
1145 * have an incompatible wider chandef.
1146 */
1147 ieee80211_teardown_tdls_peers(sdata);
1148
4c3ebc56 1149 mutex_lock(&local->mtx);
7578d575 1150 mutex_lock(&local->chanctx_mtx);
4c3ebc56
MK		 1151 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1152 lockdep_is_held(&local->chanctx_mtx));
1153 if (!conf) {
1154 sdata_info(sdata,
1155 "no channel context assigned to vif?, disconnecting\n");
f3b0bbb3 1156 goto drop_connection;
4c3ebc56
MK		 1157 }
1158
1159 chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1160
0f791eb4 1161 if (local->use_chanctx &&
30686bf7 1162 !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) {
0f791eb4
LC		 1163 sdata_info(sdata,
1164 "driver doesn't support chan-switch with channel contexts\n");
f3b0bbb3 1165 goto drop_connection;
55de908a
JB		 1166 }
1167
6d027bcc
LC		 1168 ch_switch.timestamp = timestamp;
1169 ch_switch.device_timestamp = device_timestamp;
1170 ch_switch.block_tx = csa_ie.mode;
1171 ch_switch.chandef = csa_ie.chandef;
1172 ch_switch.count = csa_ie.count;
1173
1174 if (drv_pre_channel_switch(sdata, &ch_switch)) {
1175 sdata_info(sdata,
1176 "preparing for channel switch failed, disconnecting\n");
f3b0bbb3 1177 goto drop_connection;
6d027bcc
LC		 1178 }
1179
4c3ebc56
MK		 1180 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1181 chanctx->mode, false);
1182 if (res) {
55de908a 1183 sdata_info(sdata,
4c3ebc56
MK		 1184 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1185 res);
f3b0bbb3 1186 goto drop_connection;
55de908a 1187 }
b4f286a1 1188 mutex_unlock(&local->chanctx_mtx);
55de908a 1189
c46a73f3 1190 sdata->vif.csa_active = true;
4c3ebc56 1191 sdata->csa_chandef = csa_ie.chandef;
59af6928 1192 sdata->csa_block_tx = csa_ie.mode;
f84eaa10 1193 ifmgd->csa_ignored_same_chan = false;
55de908a 1194
59af6928 1195 if (sdata->csa_block_tx)
a46992b4
LC		 1196 ieee80211_stop_vif_queues(local, sdata,
1197 IEEE80211_QUEUE_STOP_REASON_CSA);
59af6928 1198 mutex_unlock(&local->mtx);
57eebdf3 1199
2f457293
LC		 1200 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef,
1201 csa_ie.count);
1202
b4f286a1 1203 if (local->ops->channel_switch) {
5ce6e438 1204 /* use driver's channel switch callback */
0f791eb4 1205 drv_channel_switch(local, sdata, &ch_switch);
5ce6e438
JB		 1206 return;
1207 }
1208
1209 /* channel switch handled in software */
c0f17eb9 1210 if (csa_ie.count <= 1)
b4f286a1 1211 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
57eebdf3 1212 else
cc32abd4 1213 mod_timer(&ifmgd->chswitch_timer,
ff1e417c
LC		 1214 TU_TO_EXP_TIME((csa_ie.count - 1) *
1215 cbss->beacon_interval));
f3b0bbb3
JB		 1216 return;
1217 drop_connection:
1218 ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work);
1219 mutex_unlock(&local->chanctx_mtx);
1220 mutex_unlock(&local->mtx);
cc32abd4
JB		 1221}
1222
24a4e400
SG		 1223static bool
1224ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1225 struct ieee80211_channel *channel,
1226 const u8 *country_ie, u8 country_ie_len,
1227 const u8 *pwr_constr_elem,
1228 int *chan_pwr, int *pwr_reduction)
cc32abd4 1229{
04b7b2ff
JB		 1230 struct ieee80211_country_ie_triplet *triplet;
1231 int chan = ieee80211_frequency_to_channel(channel->center_freq);
24a4e400 1232 int i, chan_increment;
04b7b2ff 1233 bool have_chan_pwr = false;
cc32abd4 1234
04b7b2ff
JB		 1235 /* Invalid IE */
1236 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
24a4e400 1237 return false;
cc32abd4 1238
04b7b2ff
JB		 1239 triplet = (void *)(country_ie + 3);
1240 country_ie_len -= 3;
1241
1242 switch (channel->band) {
1243 default:
1244 WARN_ON_ONCE(1);
1245 /* fall through */
57fbcce3
JB		 1246 case NL80211_BAND_2GHZ:
1247 case NL80211_BAND_60GHZ:
04b7b2ff
JB		 1248 chan_increment = 1;
1249 break;
57fbcce3 1250 case NL80211_BAND_5GHZ:
04b7b2ff
JB		 1251 chan_increment = 4;
1252 break;
cc32abd4 1253 }
04b7b2ff
JB		 1254
1255 /* find channel */
1256 while (country_ie_len >= 3) {
1257 u8 first_channel = triplet->chans.first_channel;
1258
1259 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1260 goto next;
1261
1262 for (i = 0; i < triplet->chans.num_channels; i++) {
1263 if (first_channel + i * chan_increment == chan) {
1264 have_chan_pwr = true;
24a4e400 1265 *chan_pwr = triplet->chans.max_power;
04b7b2ff
JB		 1266 break;
1267 }
1268 }
1269 if (have_chan_pwr)
1270 break;
1271
1272 next:
1273 triplet++;
1274 country_ie_len -= 3;
1275 }
1276
a5fee9cb 1277 if (have_chan_pwr && pwr_constr_elem)
24a4e400 1278 *pwr_reduction = *pwr_constr_elem;
a5fee9cb
MB		 1279 else
1280 *pwr_reduction = 0;
1281
24a4e400
SG		 1282 return have_chan_pwr;
1283}
1284
c8d65917
SG		 1285static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
1286 struct ieee80211_channel *channel,
1287 const u8 *cisco_dtpc_ie,
1288 int *pwr_level)
1289{
1290 /* From practical testing, the first data byte of the DTPC element
1291 * seems to contain the requested dBm level, and the CLI on Cisco
1292 * APs clearly state the range is -127 to 127 dBm, which indicates
1293 * a signed byte, although it seemingly never actually goes negative.
1294 * The other byte seems to always be zero.
1295 */
1296 *pwr_level = (__s8)cisco_dtpc_ie[4];
1297}
1298
24a4e400
SG		 1299static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1300 struct ieee80211_channel *channel,
1301 struct ieee80211_mgmt *mgmt,
1302 const u8 *country_ie, u8 country_ie_len,
c8d65917
SG		 1303 const u8 *pwr_constr_ie,
1304 const u8 *cisco_dtpc_ie)
24a4e400 1305{
c8d65917
SG		 1306 bool has_80211h_pwr = false, has_cisco_pwr = false;
1307 int chan_pwr = 0, pwr_reduction_80211h = 0;
1308 int pwr_level_cisco, pwr_level_80211h;
24a4e400 1309 int new_ap_level;
a5fee9cb 1310 __le16 capab = mgmt->u.probe_resp.capab_info;
04b7b2ff 1311
a5fee9cb
MB		 1312 if (country_ie &&
1313 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) ||
1314 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) {
24a4e400
SG		 1315 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
1316 sdata, channel, country_ie, country_ie_len,
1317 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
c8d65917
SG		 1318 pwr_level_80211h =
1319 max_t(int, 0, chan_pwr - pwr_reduction_80211h);
1320 }
1321
1322 if (cisco_dtpc_ie) {
1323 ieee80211_find_cisco_dtpc(
1324 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
1325 has_cisco_pwr = true;
24a4e400 1326 }
04b7b2ff 1327
c8d65917 1328 if (!has_80211h_pwr && !has_cisco_pwr)
1ea6f9c0 1329 return 0;
04b7b2ff 1330
c8d65917
SG		 1331 /* If we have both 802.11h and Cisco DTPC, apply both limits
1332 * by picking the smallest of the two power levels advertised.
1333 */
1334 if (has_80211h_pwr &&
1335 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
a87da0cb
JB		 1336 new_ap_level = pwr_level_80211h;
1337
1338 if (sdata->ap_power_level == new_ap_level)
1339 return 0;
1340
cef2fc1c
JL		 1341 sdata_dbg(sdata,
1342 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1343 pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
1344 sdata->u.mgd.bssid);
c8d65917 1345 } else { /* has_cisco_pwr is always true here. */
a87da0cb
JB		 1346 new_ap_level = pwr_level_cisco;
1347
1348 if (sdata->ap_power_level == new_ap_level)
1349 return 0;
1350
cef2fc1c
JL		 1351 sdata_dbg(sdata,
1352 "Limiting TX power to %d dBm as advertised by %pM\n",
1353 pwr_level_cisco, sdata->u.mgd.bssid);
c8d65917 1354 }
04b7b2ff 1355
1ea6f9c0
JB		 1356 sdata->ap_power_level = new_ap_level;
1357 if (__ieee80211_recalc_txpower(sdata))
1358 return BSS_CHANGED_TXPOWER;
1359 return 0;
cc32abd4
JB		 1360}
1361
965bedad
JB		 1362/* powersave */
1363static void ieee80211_enable_ps(struct ieee80211_local *local,
1364 struct ieee80211_sub_if_data *sdata)
1365{
1366 struct ieee80211_conf *conf = &local->hw.conf;
1367
d5edaedc
JB		 1368 /*
1369 * If we are scanning right now then the parameters will
1370 * take effect when scan finishes.
1371 */
fbe9c429 1372 if (local->scanning)
d5edaedc
JB		 1373 return;
1374
965bedad 1375 if (conf->dynamic_ps_timeout > 0 &&
30686bf7 1376 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) {
965bedad
JB		 1377 mod_timer(&local->dynamic_ps_timer, jiffies +
1378 msecs_to_jiffies(conf->dynamic_ps_timeout));
1379 } else {
30686bf7 1380 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK))
076cdcb1 1381 ieee80211_send_nullfunc(local, sdata, true);
375177bf 1382
30686bf7
JB		 1383 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1384 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
2a13052f
JO		 1385 return;
1386
1387 conf->flags |= IEEE80211_CONF_PS;
1388 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965bedad
JB		 1389 }
1390}
1391
1392static void ieee80211_change_ps(struct ieee80211_local *local)
1393{
1394 struct ieee80211_conf *conf = &local->hw.conf;
1395
1396 if (local->ps_sdata) {
965bedad
JB		 1397 ieee80211_enable_ps(local, local->ps_sdata);
1398 } else if (conf->flags & IEEE80211_CONF_PS) {
1399 conf->flags &= ~IEEE80211_CONF_PS;
1400 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1401 del_timer_sync(&local->dynamic_ps_timer);
1402 cancel_work_sync(&local->dynamic_ps_enable_work);
1403 }
1404}
1405
808118cb
JY		 1406static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1407{
1408 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1409 struct sta_info *sta = NULL;
c2c98fde 1410 bool authorized = false;
808118cb
JY		 1411
1412 if (!mgd->powersave)
1413 return false;
1414
05cb9108
JB		 1415 if (mgd->broken_ap)
1416 return false;
1417
808118cb
JY		 1418 if (!mgd->associated)
1419 return false;
1420
392b9ffb 1421 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
808118cb
JY		 1422 return false;
1423
989c6505 1424 if (!mgd->have_beacon)
ce857888
AB		 1425 return false;
1426
808118cb
JY		 1427 rcu_read_lock();
1428 sta = sta_info_get(sdata, mgd->bssid);
1429 if (sta)
c2c98fde 1430 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
808118cb
JY		 1431 rcu_read_unlock();
1432
c2c98fde 1433 return authorized;
808118cb
JY		 1434}
1435
965bedad 1436/* need to hold RTNL or interface lock */
4a733ef1 1437void ieee80211_recalc_ps(struct ieee80211_local *local)
965bedad
JB		 1438{
1439 struct ieee80211_sub_if_data *sdata, *found = NULL;
1440 int count = 0;
195e294d 1441 int timeout;
965bedad 1442
30686bf7 1443 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) {
965bedad
JB		 1444 local->ps_sdata = NULL;
1445 return;
1446 }
1447
1448 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 1449 if (!ieee80211_sdata_running(sdata))
965bedad 1450 continue;
8c7914de
RM		 1451 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1452 /* If an AP vif is found, then disable PS
1453 * by setting the count to zero thereby setting
1454 * ps_sdata to NULL.
1455 */
1456 count = 0;
1457 break;
1458 }
965bedad
JB		 1459 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1460 continue;
1461 found = sdata;
1462 count++;
1463 }
1464
808118cb 1465 if (count == 1 && ieee80211_powersave_allowed(found)) {
4a733ef1 1466 u8 dtimper = found->u.mgd.dtim_period;
10f644a4 1467
ff616381 1468 timeout = local->dynamic_ps_forced_timeout;
4a733ef1
JB		 1469 if (timeout < 0)
1470 timeout = 100;
09b85568 1471 local->hw.conf.dynamic_ps_timeout = timeout;
195e294d 1472
4a733ef1
JB		 1473 /* If the TIM IE is invalid, pretend the value is 1 */
1474 if (!dtimper)
1475 dtimper = 1;
1476
1477 local->hw.conf.ps_dtim_period = dtimper;
1478 local->ps_sdata = found;
10f644a4 1479 } else {
965bedad 1480 local->ps_sdata = NULL;
10f644a4 1481 }
965bedad
JB		 1482
1483 ieee80211_change_ps(local);
1484}
1485
ab095877
EP		 1486void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1487{
1488 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1489
1490 if (sdata->vif.bss_conf.ps != ps_allowed) {
1491 sdata->vif.bss_conf.ps = ps_allowed;
1492 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1493 }
1494}
1495
965bedad
JB		 1496void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1497{
1498 struct ieee80211_local *local =
1499 container_of(work, struct ieee80211_local,
1500 dynamic_ps_disable_work);
1501
1502 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1503 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1504 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1505 }
1506
1507 ieee80211_wake_queues_by_reason(&local->hw,
445ea4e8 1508 IEEE80211_MAX_QUEUE_MAP,
cca07b00
LC		 1509 IEEE80211_QUEUE_STOP_REASON_PS,
1510 false);
965bedad
JB		 1511}
1512
1513void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1514{
1515 struct ieee80211_local *local =
1516 container_of(work, struct ieee80211_local,
1517 dynamic_ps_enable_work);
1518 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
5e34069c 1519 struct ieee80211_if_managed *ifmgd;
1ddc2867
RM		 1520 unsigned long flags;
1521 int q;
965bedad
JB		 1522
1523 /* can only happen when PS was just disabled anyway */
1524 if (!sdata)
1525 return;
1526
5e34069c
CL		 1527 ifmgd = &sdata->u.mgd;
1528
965bedad
JB		 1529 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1530 return;
1531
09b85568 1532 if (local->hw.conf.dynamic_ps_timeout > 0) {
77b7023a
AN		 1533 /* don't enter PS if TX frames are pending */
1534 if (drv_tx_frames_pending(local)) {
1ddc2867
RM		 1535 mod_timer(&local->dynamic_ps_timer, jiffies +
1536 msecs_to_jiffies(
1537 local->hw.conf.dynamic_ps_timeout));
1538 return;
1539 }
77b7023a
AN		 1540
1541 /*
1542 * transmission can be stopped by others which leads to
1543 * dynamic_ps_timer expiry. Postpone the ps timer if it
1544 * is not the actual idle state.
1545 */
1546 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1547 for (q = 0; q < local->hw.queues; q++) {
1548 if (local->queue_stop_reasons[q]) {
1549 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1550 flags);
1551 mod_timer(&local->dynamic_ps_timer, jiffies +
1552 msecs_to_jiffies(
1553 local->hw.conf.dynamic_ps_timeout));
1554 return;
1555 }
1556 }
1557 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1ddc2867 1558 }
1ddc2867 1559
30686bf7 1560 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
9c38a8b4 1561 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
a1598383 1562 if (drv_tx_frames_pending(local)) {
e8306f98
VN		 1563 mod_timer(&local->dynamic_ps_timer, jiffies +
1564 msecs_to_jiffies(
1565 local->hw.conf.dynamic_ps_timeout));
a1598383 1566 } else {
076cdcb1 1567 ieee80211_send_nullfunc(local, sdata, true);
e8306f98 1568 /* Flush to get the tx status of nullfunc frame */
3b24f4c6 1569 ieee80211_flush_queues(local, sdata, false);
e8306f98 1570 }
f3e85b9e
VN		 1571 }
1572
30686bf7
JB		 1573 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
1574 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) ||
375177bf
VN		 1575 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1576 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1577 local->hw.conf.flags |= IEEE80211_CONF_PS;
1578 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1579 }
965bedad
JB		 1580}
1581
34f11cd3 1582void ieee80211_dynamic_ps_timer(struct timer_list *t)
965bedad 1583{
34f11cd3 1584 struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer);
965bedad 1585
42935eca 1586 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 1587}
1588
164eb02d
SW		 1589void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1590{
a85a7e28 1591 struct delayed_work *delayed_work = to_delayed_work(work);
164eb02d
SW		 1592 struct ieee80211_sub_if_data *sdata =
1593 container_of(delayed_work, struct ieee80211_sub_if_data,
1594 dfs_cac_timer_work);
d2859df5 1595 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
164eb02d 1596
34a3740d
JB		 1597 mutex_lock(&sdata->local->mtx);
1598 if (sdata->wdev.cac_started) {
1599 ieee80211_vif_release_channel(sdata);
1600 cfg80211_cac_event(sdata->dev, &chandef,
1601 NL80211_RADAR_CAC_FINISHED,
1602 GFP_KERNEL);
1603 }
1604 mutex_unlock(&sdata->local->mtx);
164eb02d
SW		 1605}
1606
02219b3a
JB		 1607static bool
1608__ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1609{
1610 struct ieee80211_local *local = sdata->local;
1611 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
cc72f6e2 1612 bool ret = false;
02219b3a
JB		 1613 int ac;
1614
1615 if (local->hw.queues < IEEE80211_NUM_ACS)
1616 return false;
1617
1618 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1619 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
1620 int non_acm_ac;
1621 unsigned long now = jiffies;
1622
1623 if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
1624 tx_tspec->admitted_time &&
1625 time_after(now, tx_tspec->time_slice_start + HZ)) {
1626 tx_tspec->consumed_tx_time = 0;
1627 tx_tspec->time_slice_start = now;
1628
1629 if (tx_tspec->downgraded)
1630 tx_tspec->action =
1631 TX_TSPEC_ACTION_STOP_DOWNGRADE;
1632 }
1633
1634 switch (tx_tspec->action) {
1635 case TX_TSPEC_ACTION_STOP_DOWNGRADE:
1636 /* take the original parameters */
1637 if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac]))
1638 sdata_err(sdata,
1639 "failed to set TX queue parameters for queue %d\n",
1640 ac);
1641 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1642 tx_tspec->downgraded = false;
1643 ret = true;
1644 break;
1645 case TX_TSPEC_ACTION_DOWNGRADE:
1646 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
1647 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1648 ret = true;
1649 break;
1650 }
1651 /* downgrade next lower non-ACM AC */
1652 for (non_acm_ac = ac + 1;
1653 non_acm_ac < IEEE80211_NUM_ACS;
1654 non_acm_ac++)
1655 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
1656 break;
93db1d9e
JB		 1657 /* Usually the loop will result in using BK even if it
1658 * requires admission control, but such a configuration
1659 * makes no sense and we have to transmit somehow - the
1660 * AC selection does the same thing.
1661 * If we started out trying to downgrade from BK, then
1662 * the extra condition here might be needed.
02219b3a 1663 */
93db1d9e
JB		 1664 if (non_acm_ac >= IEEE80211_NUM_ACS)
1665 non_acm_ac = IEEE80211_AC_BK;
02219b3a
JB		 1666 if (drv_conf_tx(local, sdata, ac,
1667 &sdata->tx_conf[non_acm_ac]))
1668 sdata_err(sdata,
1669 "failed to set TX queue parameters for queue %d\n",
1670 ac);
1671 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1672 ret = true;
1673 schedule_delayed_work(&ifmgd->tx_tspec_wk,
1674 tx_tspec->time_slice_start + HZ - now + 1);
1675 break;
1676 case TX_TSPEC_ACTION_NONE:
1677 /* nothing now */
1678 break;
1679 }
1680 }
1681
1682 return ret;
1683}
1684
1685void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1686{
1687 if (__ieee80211_sta_handle_tspec_ac_params(sdata))
1688 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1689}
1690
1691static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
1692{
1693 struct ieee80211_sub_if_data *sdata;
1694
1695 sdata = container_of(work, struct ieee80211_sub_if_data,
1696 u.mgd.tx_tspec_wk.work);
1697 ieee80211_sta_handle_tspec_ac_params(sdata);
1698}
1699
60f8b39c 1700/* MLME */
7d25745d 1701static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
4ced3f74 1702 struct ieee80211_sub_if_data *sdata,
4a3cb702 1703 const u8 *wmm_param, size_t wmm_param_len)
f0706e82 1704{
2ed77ea6 1705 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS];
4ced3f74 1706 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 1707 size_t left;
2ed77ea6 1708 int count, ac;
4a3cb702
JB		 1709 const u8 *pos;
1710 u8 uapsd_queues = 0;
f0706e82 1711
e1b3ec1a 1712 if (!local->ops->conf_tx)
7d25745d 1713 return false;
e1b3ec1a 1714
32c5057b 1715 if (local->hw.queues < IEEE80211_NUM_ACS)
7d25745d 1716 return false;
3434fbd3
JB		 1717
1718 if (!wmm_param)
7d25745d 1719 return false;
3434fbd3 1720
f0706e82 1721 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
7d25745d 1722 return false;
ab13315a
KV		 1723
1724 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
dc41e4d4 1725 uapsd_queues = ifmgd->uapsd_queues;
ab13315a 1726
f0706e82 1727 count = wmm_param[6] & 0x0f;
46900298 1728 if (count == ifmgd->wmm_last_param_set)
7d25745d 1729 return false;
46900298 1730 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 1731
1732 pos = wmm_param + 8;
1733 left = wmm_param_len - 8;
1734
1735 memset(&params, 0, sizeof(params));
1736
00e96dec 1737 sdata->wmm_acm = 0;
f0706e82
JB		 1738 for (; left >= 4; left -= 4, pos += 4) {
1739 int aci = (pos[0] >> 5) & 0x03;
1740 int acm = (pos[0] >> 4) & 0x01;
ab13315a 1741 bool uapsd = false;
f0706e82
JB		 1742
1743 switch (aci) {
0eeb59fe 1744 case 1: /* AC_BK */
2ed77ea6 1745 ac = IEEE80211_AC_BK;
988c0f72 1746 if (acm)
00e96dec 1747 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV		 1748 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1749 uapsd = true;
f0706e82 1750 break;
0eeb59fe 1751 case 2: /* AC_VI */
2ed77ea6 1752 ac = IEEE80211_AC_VI;
988c0f72 1753 if (acm)
00e96dec 1754 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV		 1755 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1756 uapsd = true;
f0706e82 1757 break;
0eeb59fe 1758 case 3: /* AC_VO */
2ed77ea6 1759 ac = IEEE80211_AC_VO;
988c0f72 1760 if (acm)
00e96dec 1761 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV		 1762 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1763 uapsd = true;
f0706e82 1764 break;
0eeb59fe 1765 case 0: /* AC_BE */
f0706e82 1766 default:
2ed77ea6 1767 ac = IEEE80211_AC_BE;
988c0f72 1768 if (acm)
00e96dec 1769 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV		 1770 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1771 uapsd = true;
f0706e82
JB		 1772 break;
1773 }
1774
2ed77ea6 1775 params[ac].aifs = pos[0] & 0x0f;
730a7550 1776
2ed77ea6 1777 if (params[ac].aifs < 2) {
730a7550
EG		 1778 sdata_info(sdata,
1779 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n",
2ed77ea6
JB		 1780 params[ac].aifs, aci);
1781 params[ac].aifs = 2;
730a7550 1782 }
2ed77ea6
JB		 1783 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1784 params[ac].cw_min = ecw2cw(pos[1] & 0x0f);
1785 params[ac].txop = get_unaligned_le16(pos + 2);
1786 params[ac].acm = acm;
1787 params[ac].uapsd = uapsd;
ab13315a 1788
2ed77ea6
JB		 1789 if (params[ac].cw_min > params[ac].cw_max) {
1790 sdata_info(sdata,
1791 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n",
1792 params[ac].cw_min, params[ac].cw_max, aci);
1793 return false;
1794 }
1795 }
1796
1797 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
bdcbd8e0 1798 mlme_dbg(sdata,
2ed77ea6
JB		 1799 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
1800 ac, params[ac].acm,
1801 params[ac].aifs, params[ac].cw_min, params[ac].cw_max,
1802 params[ac].txop, params[ac].uapsd,
1803 ifmgd->tx_tspec[ac].downgraded);
1804 sdata->tx_conf[ac] = params[ac];
1805 if (!ifmgd->tx_tspec[ac].downgraded &&
1806 drv_conf_tx(local, sdata, ac, &params[ac]))
bdcbd8e0 1807 sdata_err(sdata,
2ed77ea6
JB		 1808 "failed to set TX queue parameters for AC %d\n",
1809 ac);
f0706e82 1810 }
e1b3ec1a
SG		 1811
1812 /* enable WMM or activate new settings */
4ced3f74 1813 sdata->vif.bss_conf.qos = true;
7d25745d 1814 return true;
f0706e82
JB		 1815}
1816
925e64c3
SG		 1817static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1818{
1819 lockdep_assert_held(&sdata->local->mtx);
1820
392b9ffb 1821 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
925e64c3
SG		 1822 ieee80211_run_deferred_scan(sdata->local);
1823}
1824
1825static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1826{
1827 mutex_lock(&sdata->local->mtx);
1828 __ieee80211_stop_poll(sdata);
1829 mutex_unlock(&sdata->local->mtx);
1830}
1831
7a5158ef
JB		 1832static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1833 u16 capab, bool erp_valid, u8 erp)
5628221c 1834{
bda3933a 1835 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
21a8e9dd 1836 struct ieee80211_supported_band *sband;
471b3efd 1837 u32 changed = 0;
7a5158ef
JB		 1838 bool use_protection;
1839 bool use_short_preamble;
1840 bool use_short_slot;
1841
21a8e9dd
MSS		 1842 sband = ieee80211_get_sband(sdata);
1843 if (!sband)
1844 return changed;
1845
7a5158ef
JB		 1846 if (erp_valid) {
1847 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1848 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1849 } else {
1850 use_protection = false;
1851 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1852 }
1853
1854 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
21a8e9dd 1855 if (sband->band == NL80211_BAND_5GHZ)
43d35343 1856 use_short_slot = true;
5628221c 1857
471b3efd 1858 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 1859 bss_conf->use_cts_prot = use_protection;
1860 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 1861 }
7e9ed188 1862
d43c7b37 1863 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 1864 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 1865 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 1866 }
d9430a32 1867
7a5158ef 1868 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 1869 bss_conf->use_short_slot = use_short_slot;
1870 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 1871 }
1872
1873 return changed;
1874}
1875
f698d856 1876static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 1877 struct cfg80211_bss *cbss,
ae5eb026 1878 u32 bss_info_changed)
f0706e82 1879{
0c1ad2ca 1880 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 1881 struct ieee80211_local *local = sdata->local;
68542962 1882 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
d6f2da5b 1883
ae5eb026 1884 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 1885 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
50ae34a2 1886 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 1887
7ccc8bd7 1888 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
59c1ec2b 1889 beacon_loss_count * bss_conf->beacon_int));
7ccc8bd7 1890
0c1ad2ca
JB		 1891 sdata->u.mgd.associated = cbss;
1892 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 1893
e8e4f528
JB		 1894 ieee80211_check_rate_mask(sdata);
1895
17e4ec14
JM		 1896 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1897
b115b972
JD		 1898 if (sdata->vif.p2p ||
1899 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
9caf0364 1900 const struct cfg80211_bss_ies *ies;
488dd7b5 1901
9caf0364
JB		 1902 rcu_read_lock();
1903 ies = rcu_dereference(cbss->ies);
1904 if (ies) {
9caf0364
JB		 1905 int ret;
1906
1907 ret = cfg80211_get_p2p_attr(
1908 ies->data, ies->len,
1909 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
67baf663
JD		 1910 (u8 *) &bss_conf->p2p_noa_attr,
1911 sizeof(bss_conf->p2p_noa_attr));
9caf0364 1912 if (ret >= 2) {
67baf663
JD		 1913 sdata->u.mgd.p2p_noa_index =
1914 bss_conf->p2p_noa_attr.index;
9caf0364 1915 bss_info_changed |= BSS_CHANGED_P2P_PS;
9caf0364 1916 }
488dd7b5 1917 }
9caf0364 1918 rcu_read_unlock();
488dd7b5
JB		 1919 }
1920
b291ba11 1921 /* just to be sure */
925e64c3 1922 ieee80211_stop_poll(sdata);
b291ba11 1923
9ac19a90 1924 ieee80211_led_assoc(local, 1);
9306102e 1925
989c6505 1926 if (sdata->u.mgd.have_beacon) {
826262c3
JB		 1927 /*
1928 * If the AP is buggy we may get here with no DTIM period
1929 * known, so assume it's 1 which is the only safe assumption
1930 * in that case, although if the TIM IE is broken powersave
1931 * probably just won't work at all.
1932 */
1933 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
817cee76 1934 bss_conf->beacon_rate = bss->beacon_rate;
989c6505 1935 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
826262c3 1936 } else {
817cee76 1937 bss_conf->beacon_rate = NULL;
e5b900d2 1938 bss_conf->dtim_period = 0;
826262c3 1939 }
e5b900d2 1940
68542962 1941 bss_conf->assoc = 1;
9cef8737 1942
a97c13c3 1943 /* Tell the driver to monitor connection quality (if supported) */
ea086359 1944 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
68542962 1945 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 1946 bss_info_changed |= BSS_CHANGED_CQM;
1947
68542962 1948 /* Enable ARP filtering */
0f19b41e 1949 if (bss_conf->arp_addr_cnt)
68542962 1950 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
68542962 1951
ae5eb026 1952 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 1953
056508dc 1954 mutex_lock(&local->iflist_mtx);
4a733ef1 1955 ieee80211_recalc_ps(local);
056508dc 1956 mutex_unlock(&local->iflist_mtx);
e0cb686f 1957
04ecd257 1958 ieee80211_recalc_smps(sdata);
ab095877
EP		 1959 ieee80211_recalc_ps_vif(sdata);
1960
9ac19a90 1961 netif_carrier_on(sdata->dev);
f0706e82
JB		 1962}
1963
e69e95db 1964static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
37ad3888
JB		 1965 u16 stype, u16 reason, bool tx,
1966 u8 *frame_buf)
aa458d17 1967{
46900298 1968 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17 1969 struct ieee80211_local *local = sdata->local;
3cc5240b 1970 u32 changed = 0;
aa458d17 1971
8d61ffa5 1972 sdata_assert_lock(sdata);
77fdaa12 1973
37ad3888
JB		 1974 if (WARN_ON_ONCE(tx && !frame_buf))
1975 return;
1976
b291ba11
JB		 1977 if (WARN_ON(!ifmgd->associated))
1978 return;
1979
79543d8e
DS		 1980 ieee80211_stop_poll(sdata);
1981
77fdaa12 1982 ifmgd->associated = NULL;
aa458d17
TW		 1983 netif_carrier_off(sdata->dev);
1984
88bc40e8
EP		 1985 /*
1986 * if we want to get out of ps before disassoc (why?) we have
1987 * to do it before sending disassoc, as otherwise the null-packet
1988 * won't be valid.
1989 */
1990 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1991 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1992 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1993 }
1994 local->ps_sdata = NULL;
1995
ab095877
EP		 1996 /* disable per-vif ps */
1997 ieee80211_recalc_ps_vif(sdata);
1998
14f2ae83
EG		 1999 /* make sure ongoing transmission finishes */
2000 synchronize_net();
2001
3b24f4c6
EG		 2002 /*
2003 * drop any frame before deauth/disassoc, this can be data or
2004 * management frame. Since we are disconnecting, we should not
2005 * insist sending these frames which can take time and delay
2006 * the disconnection and possible the roaming.
2007 */
f823981e 2008 if (tx)
3b24f4c6 2009 ieee80211_flush_queues(local, sdata, true);
f823981e 2010
37ad3888
JB		 2011 /* deauthenticate/disassociate now */
2012 if (tx || frame_buf)
88a9e31c
EP		 2013 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
2014 reason, tx, frame_buf);
37ad3888 2015
3b24f4c6 2016 /* flush out frame - make sure the deauth was actually sent */
37ad3888 2017 if (tx)
3b24f4c6 2018 ieee80211_flush_queues(local, sdata, false);
37ad3888 2019
88a9e31c 2020 /* clear bssid only after building the needed mgmt frames */
c84a67a2 2021 eth_zero_addr(ifmgd->bssid);
88a9e31c 2022
37ad3888 2023 /* remove AP and TDLS peers */
d34ba216 2024 sta_info_flush(sdata);
37ad3888
JB		 2025
2026 /* finally reset all BSS / config parameters */
f5e5bf25
TW		 2027 changed |= ieee80211_reset_erp_info(sdata);
2028
f5e5bf25 2029 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 2030 changed |= BSS_CHANGED_ASSOC;
2031 sdata->vif.bss_conf.assoc = false;
f5e5bf25 2032
67baf663
JD		 2033 ifmgd->p2p_noa_index = -1;
2034 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
2035 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
488dd7b5 2036
dd5ecfea 2037 /* on the next assoc, re-program HT/VHT parameters */
ef96a842
BG		 2038 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
2039 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
dd5ecfea
JB		 2040 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
2041 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
23a1f8d4
SS		 2042
2043 /* reset MU-MIMO ownership and group data */
2044 memset(sdata->vif.bss_conf.mu_group.membership, 0,
2045 sizeof(sdata->vif.bss_conf.mu_group.membership));
2046 memset(sdata->vif.bss_conf.mu_group.position, 0,
2047 sizeof(sdata->vif.bss_conf.mu_group.position));
2048 changed |= BSS_CHANGED_MU_GROUPS;
b5a33d52 2049 sdata->vif.mu_mimo_owner = false;
413ad50a 2050
1ea6f9c0 2051 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
a8302de9 2052
520eb820
KV		 2053 del_timer_sync(&local->dynamic_ps_timer);
2054 cancel_work_sync(&local->dynamic_ps_enable_work);
2055
68542962 2056 /* Disable ARP filtering */
0f19b41e 2057 if (sdata->vif.bss_conf.arp_addr_cnt)
68542962 2058 changed |= BSS_CHANGED_ARP_FILTER;
68542962 2059
3abead59
JB		 2060 sdata->vif.bss_conf.qos = false;
2061 changed |= BSS_CHANGED_QOS;
2062
0aaffa9b
JB		 2063 /* The BSSID (not really interesting) and HT changed */
2064 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 2065 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 2066
3abead59 2067 /* disassociated - set to defaults now */
cec66283 2068 ieee80211_set_wmm_default(sdata, false, false);
3abead59 2069
b9dcf712
JB		 2070 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
2071 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
2072 del_timer_sync(&sdata->u.mgd.timer);
2073 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2d9957cc 2074
826262c3 2075 sdata->vif.bss_conf.dtim_period = 0;
817cee76
AB		 2076 sdata->vif.bss_conf.beacon_rate = NULL;
2077
989c6505 2078 ifmgd->have_beacon = false;
826262c3 2079
028e8da0 2080 ifmgd->flags = 0;
34a3740d 2081 mutex_lock(&local->mtx);
028e8da0 2082 ieee80211_vif_release_channel(sdata);
59af6928
MK		 2083
2084 sdata->vif.csa_active = false;
0c21e632 2085 ifmgd->csa_waiting_bcn = false;
f84eaa10 2086 ifmgd->csa_ignored_same_chan = false;
a46992b4
LC		 2087 if (sdata->csa_block_tx) {
2088 ieee80211_wake_vif_queues(local, sdata,
2089 IEEE80211_QUEUE_STOP_REASON_CSA);
2090 sdata->csa_block_tx = false;
2091 }
34a3740d 2092 mutex_unlock(&local->mtx);
2475b1cc 2093
02219b3a
JB		 2094 /* existing TX TSPEC sessions no longer exist */
2095 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
2096 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
2097
2475b1cc 2098 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
aa458d17 2099}
f0706e82 2100
3cf335d5
KV		 2101void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
2102 struct ieee80211_hdr *hdr)
2103{
2104 /*
2105 * We can postpone the mgd.timer whenever receiving unicast frames
2106 * from AP because we know that the connection is working both ways
2107 * at that time. But multicast frames (and hence also beacons) must
2108 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 2109 * data idle periods for sending the periodic probe request to the
2110 * AP we're connected to.
3cf335d5 2111 */
b291ba11
JB		 2112 if (is_multicast_ether_addr(hdr->addr1))
2113 return;
2114
be099e82 2115 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 2116}
f0706e82 2117
4e5ff376
FF		 2118static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
2119{
2120 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
133d40f9 2121 struct ieee80211_local *local = sdata->local;
4e5ff376 2122
133d40f9 2123 mutex_lock(&local->mtx);
392b9ffb
SG		 2124 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
2125 goto out;
4e5ff376 2126
925e64c3 2127 __ieee80211_stop_poll(sdata);
133d40f9
SG		 2128
2129 mutex_lock(&local->iflist_mtx);
4a733ef1 2130 ieee80211_recalc_ps(local);
133d40f9 2131 mutex_unlock(&local->iflist_mtx);
4e5ff376 2132
30686bf7 2133 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
133d40f9 2134 goto out;
4e5ff376
FF		 2135
2136 /*
2137 * We've received a probe response, but are not sure whether
2138 * we have or will be receiving any beacons or data, so let's
2139 * schedule the timers again, just in case.
2140 */
2141 ieee80211_sta_reset_beacon_monitor(sdata);
2142
2143 mod_timer(&ifmgd->conn_mon_timer,
2144 round_jiffies_up(jiffies +
2145 IEEE80211_CONNECTION_IDLE_TIME));
133d40f9 2146out:
133d40f9 2147 mutex_unlock(&local->mtx);
4e5ff376
FF		 2148}
2149
02219b3a
JB		 2150static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
2151 struct ieee80211_hdr *hdr,
2152 u16 tx_time)
2153{
2154 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2155 u16 tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
2156 int ac = ieee80211_ac_from_tid(tid);
2157 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
2158 unsigned long now = jiffies;
2159
2160 if (likely(!tx_tspec->admitted_time))
2161 return;
2162
2163 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2164 tx_tspec->consumed_tx_time = 0;
2165 tx_tspec->time_slice_start = now;
2166
2167 if (tx_tspec->downgraded) {
2168 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
2169 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2170 }
2171 }
2172
2173 if (tx_tspec->downgraded)
2174 return;
2175
2176 tx_tspec->consumed_tx_time += tx_time;
2177
2178 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
2179 tx_tspec->downgraded = true;
2180 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
2181 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2182 }
2183}
2184
4e5ff376 2185void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
02219b3a 2186 struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
4e5ff376 2187{
02219b3a
JB		 2188 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
2189
75706d0e 2190 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF		 2191 return;
2192
4e5ff376
FF		 2193 if (ieee80211_is_nullfunc(hdr->frame_control) &&
2194 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e 2195 if (ack)
cab1c7fd 2196 ieee80211_sta_reset_conn_monitor(sdata);
04ac3c0e
FF		 2197 else
2198 sdata->u.mgd.nullfunc_failed = true;
4e5ff376 2199 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
cab1c7fd 2200 return;
4e5ff376 2201 }
cab1c7fd
WD		 2202
2203 if (ack)
2204 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF		 2205}
2206
a43abf29
ML		 2207static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2208{
2209 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2210 const u8 *ssid;
f01a067d 2211 u8 *dst = ifmgd->associated->bssid;
180205bd 2212 u8 unicast_limit = max(1, max_probe_tries - 3);
49ddf8e6 2213 struct sta_info *sta;
f01a067d
LR		 2214
2215 /*
2216 * Try sending broadcast probe requests for the last three
2217 * probe requests after the first ones failed since some
2218 * buggy APs only support broadcast probe requests.
2219 */
2220 if (ifmgd->probe_send_count >= unicast_limit)
2221 dst = NULL;
a43abf29 2222
4e5ff376
FF		 2223 /*
2224 * When the hardware reports an accurate Tx ACK status, it's
2225 * better to send a nullfunc frame instead of a probe request,
2226 * as it will kick us off the AP quickly if we aren't associated
2227 * anymore. The timeout will be reset if the frame is ACKed by
2228 * the AP.
2229 */
992e68bf
SD		 2230 ifmgd->probe_send_count++;
2231
49ddf8e6
JB		 2232 if (dst) {
2233 mutex_lock(&sdata->local->sta_mtx);
2234 sta = sta_info_get(sdata, dst);
2235 if (!WARN_ON(!sta))
2236 ieee80211_check_fast_rx(sta);
2237 mutex_unlock(&sdata->local->sta_mtx);
2238 }
2239
30686bf7 2240 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) {
04ac3c0e 2241 ifmgd->nullfunc_failed = false;
076cdcb1 2242 ieee80211_send_nullfunc(sdata->local, sdata, false);
04ac3c0e 2243 } else {
88c868c4
SG		 2244 int ssid_len;
2245
9caf0364 2246 rcu_read_lock();
4e5ff376 2247 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
88c868c4
SG		 2248 if (WARN_ON_ONCE(ssid == NULL))
2249 ssid_len = 0;
2250 else
2251 ssid_len = ssid[1];
2252
a73f8e21 2253 ieee80211_send_probe_req(sdata, sdata->vif.addr, dst,
a344d677 2254 ssid + 2, ssid_len, NULL,
1672c0e3 2255 0, (u32) -1, true, 0,
55de908a 2256 ifmgd->associated->channel, false);
9caf0364 2257 rcu_read_unlock();
4e5ff376 2258 }
a43abf29 2259
180205bd 2260 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
8d61ffa5 2261 run_again(sdata, ifmgd->probe_timeout);
a43abf29
ML		 2262}
2263
b291ba11
JB		 2264static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2265 bool beacon)
04de8381 2266{
04de8381 2267 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 2268 bool already = false;
34bfc411 2269
9607e6b6 2270 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 2271 return;
2272
8d61ffa5 2273 sdata_lock(sdata);
77fdaa12
JB		 2274
2275 if (!ifmgd->associated)
2276 goto out;
2277
133d40f9
SG		 2278 mutex_lock(&sdata->local->mtx);
2279
2280 if (sdata->local->tmp_channel || sdata->local->scanning) {
2281 mutex_unlock(&sdata->local->mtx);
2282 goto out;
2283 }
2284
a13fbe54 2285 if (beacon) {
bdcbd8e0 2286 mlme_dbg_ratelimited(sdata,
59c1ec2b
BG		 2287 "detected beacon loss from AP (missed %d beacons) - probing\n",
2288 beacon_loss_count);
bdcbd8e0 2289
98f03342 2290 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
a13fbe54 2291 }
04de8381 2292
b291ba11
JB		 2293 /*
2294 * The driver/our work has already reported this event or the
2295 * connection monitoring has kicked in and we have already sent
2296 * a probe request. Or maybe the AP died and the driver keeps
2297 * reporting until we disassociate...
2298 *
2299 * In either case we have to ignore the current call to this
2300 * function (except for setting the correct probe reason bit)
2301 * because otherwise we would reset the timer every time and
2302 * never check whether we received a probe response!
2303 */
392b9ffb 2304 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
b291ba11
JB		 2305 already = true;
2306
12b5f34d
EP		 2307 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2308
133d40f9
SG		 2309 mutex_unlock(&sdata->local->mtx);
2310
b291ba11
JB		 2311 if (already)
2312 goto out;
2313
4e751843 2314 mutex_lock(&sdata->local->iflist_mtx);
4a733ef1 2315 ieee80211_recalc_ps(sdata->local);
4e751843
JB		 2316 mutex_unlock(&sdata->local->iflist_mtx);
2317
a43abf29
ML		 2318 ifmgd->probe_send_count = 0;
2319 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12 2320 out:
8d61ffa5 2321 sdata_unlock(sdata);
04de8381
KV		 2322}
2323
a619a4c0
JO		 2324struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2325 struct ieee80211_vif *vif)
2326{
2327 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2328 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d9b3b28b 2329 struct cfg80211_bss *cbss;
a619a4c0
JO		 2330 struct sk_buff *skb;
2331 const u8 *ssid;
88c868c4 2332 int ssid_len;
a619a4c0
JO		 2333
2334 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2335 return NULL;
2336
8d61ffa5 2337 sdata_assert_lock(sdata);
a619a4c0 2338
d9b3b28b
EP		 2339 if (ifmgd->associated)
2340 cbss = ifmgd->associated;
2341 else if (ifmgd->auth_data)
2342 cbss = ifmgd->auth_data->bss;
2343 else if (ifmgd->assoc_data)
2344 cbss = ifmgd->assoc_data->bss;
2345 else
a619a4c0
JO		 2346 return NULL;
2347
9caf0364 2348 rcu_read_lock();
d9b3b28b 2349 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
88c868c4
SG		 2350 if (WARN_ON_ONCE(ssid == NULL))
2351 ssid_len = 0;
2352 else
2353 ssid_len = ssid[1];
2354
a344d677 2355 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
55de908a 2356 (u32) -1, cbss->channel,
6b77863b 2357 ssid + 2, ssid_len,
85a237fe 2358 NULL, 0, true);
9caf0364 2359 rcu_read_unlock();
a619a4c0
JO		 2360
2361 return skb;
2362}
2363EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2364
a90faa9d
EG		 2365static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata,
2366 const u8 *buf, size_t len, bool tx,
2367 u16 reason)
2368{
2369 struct ieee80211_event event = {
2370 .type = MLME_EVENT,
2371 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT,
2372 .u.mlme.reason = reason,
2373 };
2374
2375 if (tx)
2376 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len);
2377 else
2378 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len);
2379
2380 drv_event_callback(sdata->local, sdata, &event);
2381}
2382
eef9e54c 2383static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
1e4dcd01 2384{
59af6928 2385 struct ieee80211_local *local = sdata->local;
1e4dcd01 2386 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 2387 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
1e4dcd01 2388
8d61ffa5 2389 sdata_lock(sdata);
1e4dcd01 2390 if (!ifmgd->associated) {
8d61ffa5 2391 sdata_unlock(sdata);
1e4dcd01
JO		 2392 return;
2393 }
2394
20eb7ea9
DS		 2395 /* AP is probably out of range (or not reachable for another reason) so
2396 * remove the bss struct for that AP.
2397 */
2398 cfg80211_unlink_bss(local->hw.wiphy, ifmgd->associated);
2399
37ad3888
JB		 2400 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2401 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
eef9e54c 2402 true, frame_buf);
59af6928 2403 mutex_lock(&local->mtx);
7578d575 2404 sdata->vif.csa_active = false;
0c21e632 2405 ifmgd->csa_waiting_bcn = false;
a46992b4
LC		 2406 if (sdata->csa_block_tx) {
2407 ieee80211_wake_vif_queues(local, sdata,
2408 IEEE80211_QUEUE_STOP_REASON_CSA);
2409 sdata->csa_block_tx = false;
2410 }
59af6928 2411 mutex_unlock(&local->mtx);
7da7cc1d 2412
a90faa9d
EG		 2413 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
2414 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2415
8d61ffa5 2416 sdata_unlock(sdata);
1e4dcd01
JO		 2417}
2418
cc74c0c7 2419static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 2420{
2421 struct ieee80211_sub_if_data *sdata =
2422 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 2423 u.mgd.beacon_connection_loss_work);
a85e1d55 2424 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
a85e1d55 2425
976bd9ef
JB		 2426 if (ifmgd->associated)
2427 ifmgd->beacon_loss_count++;
b291ba11 2428
682bd38b 2429 if (ifmgd->connection_loss) {
882a7c69
JB		 2430 sdata_info(sdata, "Connection to AP %pM lost\n",
2431 ifmgd->bssid);
eef9e54c 2432 __ieee80211_disconnect(sdata);
882a7c69 2433 } else {
1e4dcd01 2434 ieee80211_mgd_probe_ap(sdata, true);
882a7c69
JB		 2435 }
2436}
2437
2438static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2439{
2440 struct ieee80211_sub_if_data *sdata =
2441 container_of(work, struct ieee80211_sub_if_data,
2442 u.mgd.csa_connection_drop_work);
2443
eef9e54c 2444 __ieee80211_disconnect(sdata);
b291ba11
JB		 2445}
2446
04de8381
KV		 2447void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2448{
2449 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 2450 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 2451
b5878a2d
JB		 2452 trace_api_beacon_loss(sdata);
2453
682bd38b 2454 sdata->u.mgd.connection_loss = false;
1e4dcd01 2455 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 2456}
2457EXPORT_SYMBOL(ieee80211_beacon_loss);
2458
1e4dcd01
JO		 2459void ieee80211_connection_loss(struct ieee80211_vif *vif)
2460{
2461 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2462 struct ieee80211_hw *hw = &sdata->local->hw;
2463
b5878a2d
JB		 2464 trace_api_connection_loss(sdata);
2465
682bd38b 2466 sdata->u.mgd.connection_loss = true;
1e4dcd01
JO		 2467 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2468}
2469EXPORT_SYMBOL(ieee80211_connection_loss);
2470
2471
66e67e41
JB		 2472static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2473 bool assoc)
2474{
2475 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2476
8d61ffa5 2477 sdata_assert_lock(sdata);
66e67e41 2478
66e67e41 2479 if (!assoc) {
c1e140bf
EG		 2480 /*
2481 * we are not authenticated yet, the only timer that could be
2482 * running is the timeout for the authentication response which
2483 * which is not relevant anymore.
2484 */
2485 del_timer_sync(&sdata->u.mgd.timer);
66e67e41
JB		 2486 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2487
c84a67a2 2488 eth_zero_addr(sdata->u.mgd.bssid);
66e67e41 2489 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
028e8da0 2490 sdata->u.mgd.flags = 0;
34a3740d 2491 mutex_lock(&sdata->local->mtx);
55de908a 2492 ieee80211_vif_release_channel(sdata);
34a3740d 2493 mutex_unlock(&sdata->local->mtx);
66e67e41
JB		 2494 }
2495
5b112d3d 2496 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
66e67e41
JB		 2497 kfree(auth_data);
2498 sdata->u.mgd.auth_data = NULL;
2499}
2500
c9c99f89 2501static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
e6f462df 2502 bool assoc, bool abandon)
c9c99f89
JB		 2503{
2504 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2505
2506 sdata_assert_lock(sdata);
2507
2508 if (!assoc) {
2509 /*
2510 * we are not associated yet, the only timer that could be
2511 * running is the timeout for the association response which
2512 * which is not relevant anymore.
2513 */
2514 del_timer_sync(&sdata->u.mgd.timer);
2515 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2516
2517 eth_zero_addr(sdata->u.mgd.bssid);
2518 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2519 sdata->u.mgd.flags = 0;
b5a33d52
SS		 2520 sdata->vif.mu_mimo_owner = false;
2521
c9c99f89
JB		 2522 mutex_lock(&sdata->local->mtx);
2523 ieee80211_vif_release_channel(sdata);
2524 mutex_unlock(&sdata->local->mtx);
e6f462df
JB		 2525
2526 if (abandon)
2527 cfg80211_abandon_assoc(sdata->dev, assoc_data->bss);
c9c99f89
JB		 2528 }
2529
2530 kfree(assoc_data);
2531 sdata->u.mgd.assoc_data = NULL;
2532}
2533
66e67e41
JB		 2534static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2535 struct ieee80211_mgmt *mgmt, size_t len)
2536{
1672c0e3 2537 struct ieee80211_local *local = sdata->local;
66e67e41
JB		 2538 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2539 u8 *pos;
2540 struct ieee802_11_elems elems;
1672c0e3 2541 u32 tx_flags = 0;
66e67e41
JB		 2542
2543 pos = mgmt->u.auth.variable;
b2e506bf 2544 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
66e67e41
JB		 2545 if (!elems.challenge)
2546 return;
2547 auth_data->expected_transaction = 4;
a1845fc7 2548 drv_mgd_prepare_tx(sdata->local, sdata);
30686bf7 2549 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1672c0e3
JB		 2550 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2551 IEEE80211_TX_INTFL_MLME_CONN_TX;
700e8ea6 2552 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
66e67e41
JB		 2553 elems.challenge - 2, elems.challenge_len + 2,
2554 auth_data->bss->bssid, auth_data->bss->bssid,
2555 auth_data->key, auth_data->key_len,
1672c0e3 2556 auth_data->key_idx, tx_flags);
66e67e41
JB		 2557}
2558
8d61ffa5
JB		 2559static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2560 struct ieee80211_mgmt *mgmt, size_t len)
66e67e41
JB		 2561{
2562 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2563 u8 bssid[ETH_ALEN];
2564 u16 auth_alg, auth_transaction, status_code;
2565 struct sta_info *sta;
a9409093
EG		 2566 struct ieee80211_event event = {
2567 .type = MLME_EVENT,
2568 .u.mlme.data = AUTH_EVENT,
2569 };
66e67e41 2570
8d61ffa5 2571 sdata_assert_lock(sdata);
66e67e41
JB		 2572
2573 if (len < 24 + 6)
8d61ffa5 2574 return;
66e67e41
JB		 2575
2576 if (!ifmgd->auth_data || ifmgd->auth_data->done)
8d61ffa5 2577 return;
66e67e41
JB		 2578
2579 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2580
b203ca39 2581 if (!ether_addr_equal(bssid, mgmt->bssid))
8d61ffa5 2582 return;
66e67e41
JB		 2583
2584 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2585 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2586 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2587
2588 if (auth_alg != ifmgd->auth_data->algorithm ||
0f4126e8
JM		 2589 auth_transaction != ifmgd->auth_data->expected_transaction) {
2590 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2591 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2592 auth_transaction,
2593 ifmgd->auth_data->expected_transaction);
8d61ffa5 2594 return;
0f4126e8 2595 }
66e67e41
JB		 2596
2597 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2598 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2599 mgmt->sa, status_code);
dac211ec 2600 ieee80211_destroy_auth_data(sdata, false);
6ff57cf8 2601 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
a9409093
EG		 2602 event.u.mlme.status = MLME_DENIED;
2603 event.u.mlme.reason = status_code;
2604 drv_event_callback(sdata->local, sdata, &event);
8d61ffa5 2605 return;
66e67e41
JB		 2606 }
2607
2608 switch (ifmgd->auth_data->algorithm) {
2609 case WLAN_AUTH_OPEN:
2610 case WLAN_AUTH_LEAP:
2611 case WLAN_AUTH_FT:
6b8ece3a 2612 case WLAN_AUTH_SAE:
dbc0c2cb
JM		 2613 case WLAN_AUTH_FILS_SK:
2614 case WLAN_AUTH_FILS_SK_PFS:
2615 case WLAN_AUTH_FILS_PK:
66e67e41
JB		 2616 break;
2617 case WLAN_AUTH_SHARED_KEY:
2618 if (ifmgd->auth_data->expected_transaction != 4) {
2619 ieee80211_auth_challenge(sdata, mgmt, len);
2620 /* need another frame */
8d61ffa5 2621 return;
66e67e41
JB		 2622 }
2623 break;
2624 default:
2625 WARN_ONCE(1, "invalid auth alg %d",
2626 ifmgd->auth_data->algorithm);
8d61ffa5 2627 return;
66e67e41
JB		 2628 }
2629
a9409093
EG		 2630 event.u.mlme.status = MLME_SUCCESS;
2631 drv_event_callback(sdata->local, sdata, &event);
bdcbd8e0 2632 sdata_info(sdata, "authenticated\n");
66e67e41
JB		 2633 ifmgd->auth_data->done = true;
2634 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
89afe614 2635 ifmgd->auth_data->timeout_started = true;
8d61ffa5 2636 run_again(sdata, ifmgd->auth_data->timeout);
66e67e41 2637
6b8ece3a
JM		 2638 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2639 ifmgd->auth_data->expected_transaction != 2) {
2640 /*
2641 * Report auth frame to user space for processing since another
2642 * round of Authentication frames is still needed.
2643 */
6ff57cf8 2644 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
8d61ffa5 2645 return;
6b8ece3a
JM		 2646 }
2647
66e67e41
JB		 2648 /* move station state to auth */
2649 mutex_lock(&sdata->local->sta_mtx);
2650 sta = sta_info_get(sdata, bssid);
2651 if (!sta) {
2652 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2653 goto out_err;
2654 }
2655 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
bdcbd8e0 2656 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
66e67e41
JB		 2657 goto out_err;
2658 }
2659 mutex_unlock(&sdata->local->sta_mtx);
2660
6ff57cf8 2661 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
8d61ffa5 2662 return;
66e67e41
JB		 2663 out_err:
2664 mutex_unlock(&sdata->local->sta_mtx);
2665 /* ignore frame -- wait for timeout */
66e67e41
JB		 2666}
2667
dfa1ad29
CO		 2668#define case_WLAN(type) \
2669 case WLAN_REASON_##type: return #type
2670
2671static const char *ieee80211_get_reason_code_string(u16 reason_code)
2672{
2673 switch (reason_code) {
2674 case_WLAN(UNSPECIFIED);
2675 case_WLAN(PREV_AUTH_NOT_VALID);
2676 case_WLAN(DEAUTH_LEAVING);
2677 case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2678 case_WLAN(DISASSOC_AP_BUSY);
2679 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2680 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2681 case_WLAN(DISASSOC_STA_HAS_LEFT);
2682 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2683 case_WLAN(DISASSOC_BAD_POWER);
2684 case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2685 case_WLAN(INVALID_IE);
2686 case_WLAN(MIC_FAILURE);
2687 case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2688 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2689 case_WLAN(IE_DIFFERENT);
2690 case_WLAN(INVALID_GROUP_CIPHER);
2691 case_WLAN(INVALID_PAIRWISE_CIPHER);
2692 case_WLAN(INVALID_AKMP);
2693 case_WLAN(UNSUPP_RSN_VERSION);
2694 case_WLAN(INVALID_RSN_IE_CAP);
2695 case_WLAN(IEEE8021X_FAILED);
2696 case_WLAN(CIPHER_SUITE_REJECTED);
2697 case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2698 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2699 case_WLAN(DISASSOC_LOW_ACK);
2700 case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2701 case_WLAN(QSTA_LEAVE_QBSS);
2702 case_WLAN(QSTA_NOT_USE);
2703 case_WLAN(QSTA_REQUIRE_SETUP);
2704 case_WLAN(QSTA_TIMEOUT);
2705 case_WLAN(QSTA_CIPHER_NOT_SUPP);
2706 case_WLAN(MESH_PEER_CANCELED);
2707 case_WLAN(MESH_MAX_PEERS);
2708 case_WLAN(MESH_CONFIG);
2709 case_WLAN(MESH_CLOSE);
2710 case_WLAN(MESH_MAX_RETRIES);
2711 case_WLAN(MESH_CONFIRM_TIMEOUT);
2712 case_WLAN(MESH_INVALID_GTK);
2713 case_WLAN(MESH_INCONSISTENT_PARAM);
2714 case_WLAN(MESH_INVALID_SECURITY);
2715 case_WLAN(MESH_PATH_ERROR);
2716 case_WLAN(MESH_PATH_NOFORWARD);
2717 case_WLAN(MESH_PATH_DEST_UNREACHABLE);
2718 case_WLAN(MAC_EXISTS_IN_MBSS);
2719 case_WLAN(MESH_CHAN_REGULATORY);
2720 case_WLAN(MESH_CHAN);
2721 default: return "<unknown>";
2722 }
2723}
66e67e41 2724
8d61ffa5
JB		 2725static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2726 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2727{
46900298 2728 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
c9c99f89 2729 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
f0706e82 2730
8d61ffa5 2731 sdata_assert_lock(sdata);
66e67e41 2732
f4ea83dd 2733 if (len < 24 + 2)
8d61ffa5 2734 return;
f0706e82 2735
c9c99f89
JB		 2736 if (ifmgd->associated &&
2737 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) {
2738 const u8 *bssid = ifmgd->associated->bssid;
77fdaa12 2739
c9c99f89
JB		 2740 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
2741 bssid, reason_code,
2742 ieee80211_get_reason_code_string(reason_code));
f0706e82 2743
c9c99f89 2744 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
f0706e82 2745
c9c99f89
JB		 2746 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false,
2747 reason_code);
2748 return;
2749 }
77fdaa12 2750
c9c99f89
JB		 2751 if (ifmgd->assoc_data &&
2752 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
2753 const u8 *bssid = ifmgd->assoc_data->bss->bssid;
37ad3888 2754
c9c99f89
JB		 2755 sdata_info(sdata,
2756 "deauthenticated from %pM while associating (Reason: %u=%s)\n",
2757 bssid, reason_code,
2758 ieee80211_get_reason_code_string(reason_code));
2759
e6f462df 2760 ieee80211_destroy_assoc_data(sdata, false, true);
c9c99f89
JB		 2761
2762 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2763 return;
2764 }
f0706e82
JB		 2765}
2766
2767
8d61ffa5
JB		 2768static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2769 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2770{
46900298 2771 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 2772 u16 reason_code;
2773
8d61ffa5 2774 sdata_assert_lock(sdata);
77fdaa12 2775
66e67e41 2776 if (len < 24 + 2)
8d61ffa5 2777 return;
77fdaa12 2778
66e67e41 2779 if (!ifmgd->associated ||
b203ca39 2780 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
8d61ffa5 2781 return;
f0706e82
JB		 2782
2783 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2784
68506e9a
AM		 2785 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n",
2786 mgmt->sa, reason_code,
2787 ieee80211_get_reason_code_string(reason_code));
f0706e82 2788
37ad3888
JB		 2789 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2790
a90faa9d 2791 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code);
f0706e82
JB		 2792}
2793
c74d084f
CL		 2794static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2795 u8 *supp_rates, unsigned int supp_rates_len,
2796 u32 *rates, u32 *basic_rates,
2797 bool *have_higher_than_11mbit,
2103dec1 2798 int *min_rate, int *min_rate_index,
44f6d42c 2799 int shift)
c74d084f
CL		 2800{
2801 int i, j;
2802
2803 for (i = 0; i < supp_rates_len; i++) {
2103dec1 2804 int rate = supp_rates[i] & 0x7f;
c74d084f
CL		 2805 bool is_basic = !!(supp_rates[i] & 0x80);
2806
2103dec1 2807 if ((rate * 5 * (1 << shift)) > 110)
c74d084f
CL		 2808 *have_higher_than_11mbit = true;
2809
2810 /*
a6289d3f
JB		 2811 * Skip HT and VHT BSS membership selectors since they're not
2812 * rates.
c74d084f 2813 *
a6289d3f 2814 * Note: Even though the membership selector and the basic
c74d084f
CL		 2815 * rate flag share the same bit, they are not exactly
2816 * the same.
2817 */
a6289d3f
JB		 2818 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) ||
2819 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY))
c74d084f
CL		 2820 continue;
2821
2822 for (j = 0; j < sband->n_bitrates; j++) {
2103dec1
SW		 2823 struct ieee80211_rate *br;
2824 int brate;
2825
2826 br = &sband->bitrates[j];
2103dec1
SW		 2827
2828 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2829 if (brate == rate) {
c74d084f
CL		 2830 *rates |= BIT(j);
2831 if (is_basic)
2832 *basic_rates |= BIT(j);
2103dec1
SW		 2833 if ((rate * 5) < *min_rate) {
2834 *min_rate = rate * 5;
c74d084f
CL		 2835 *min_rate_index = j;
2836 }
2837 break;
2838 }
2839 }
2840 }
2841}
f0706e82 2842
66e67e41
JB		 2843static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2844 struct cfg80211_bss *cbss,
af6b6374 2845 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2846{
46900298 2847 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 2848 struct ieee80211_local *local = sdata->local;
8318d78a 2849 struct ieee80211_supported_band *sband;
f0706e82 2850 struct sta_info *sta;
af6b6374 2851 u8 *pos;
af6b6374 2852 u16 capab_info, aid;
f0706e82 2853 struct ieee802_11_elems elems;
bda3933a 2854 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
35d865af
JB		 2855 const struct cfg80211_bss_ies *bss_ies = NULL;
2856 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
ae5eb026 2857 u32 changed = 0;
c74d084f 2858 int err;
35d865af 2859 bool ret;
f0706e82 2860
af6b6374 2861 /* AssocResp and ReassocResp have identical structure */
f0706e82 2862
f0706e82 2863 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 2864 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 2865
c7c477b5
JB		 2866 /*
2867 * The 5 MSB of the AID field are reserved
2868 * (802.11-2016 9.4.1.8 AID field)
2869 */
2870 aid &= 0x7ff;
1dd84aa2 2871
05cb9108
JB		 2872 ifmgd->broken_ap = false;
2873
2874 if (aid == 0 || aid > IEEE80211_MAX_AID) {
bdcbd8e0
JB		 2875 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2876 aid);
05cb9108
JB		 2877 aid = 0;
2878 ifmgd->broken_ap = true;
2879 }
2880
af6b6374 2881 pos = mgmt->u.assoc_resp.variable;
b2e506bf 2882 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
af6b6374 2883
f0706e82 2884 if (!elems.supp_rates) {
bdcbd8e0 2885 sdata_info(sdata, "no SuppRates element in AssocResp\n");
af6b6374 2886 return false;
f0706e82
JB		 2887 }
2888
46900298 2889 ifmgd->aid = aid;
9041c1fa
AN		 2890 ifmgd->tdls_chan_switch_prohibited =
2891 elems.ext_capab && elems.ext_capab_len >= 5 &&
2892 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
f0706e82 2893
35d865af
JB		 2894 /*
2895 * Some APs are erroneously not including some information in their
2896 * (re)association response frames. Try to recover by using the data
2897 * from the beacon or probe response. This seems to afflict mobile
2898 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2899 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2900 */
2901 if ((assoc_data->wmm && !elems.wmm_param) ||
2902 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2903 (!elems.ht_cap_elem || !elems.ht_operation)) ||
2904 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2905 (!elems.vht_cap_elem || !elems.vht_operation))) {
2906 const struct cfg80211_bss_ies *ies;
2907 struct ieee802_11_elems bss_elems;
2908
2909 rcu_read_lock();
2910 ies = rcu_dereference(cbss->ies);
2911 if (ies)
2912 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2913 GFP_ATOMIC);
2914 rcu_read_unlock();
2915 if (!bss_ies)
2916 return false;
2917
2918 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2919 false, &bss_elems);
2920 if (assoc_data->wmm &&
2921 !elems.wmm_param && bss_elems.wmm_param) {
2922 elems.wmm_param = bss_elems.wmm_param;
2923 sdata_info(sdata,
2924 "AP bug: WMM param missing from AssocResp\n");
2925 }
2926
2927 /*
2928 * Also check if we requested HT/VHT, otherwise the AP doesn't
2929 * have to include the IEs in the (re)association response.
2930 */
2931 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2932 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2933 elems.ht_cap_elem = bss_elems.ht_cap_elem;
2934 sdata_info(sdata,
2935 "AP bug: HT capability missing from AssocResp\n");
2936 }
2937 if (!elems.ht_operation && bss_elems.ht_operation &&
2938 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2939 elems.ht_operation = bss_elems.ht_operation;
2940 sdata_info(sdata,
2941 "AP bug: HT operation missing from AssocResp\n");
2942 }
2943 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2944 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2945 elems.vht_cap_elem = bss_elems.vht_cap_elem;
2946 sdata_info(sdata,
2947 "AP bug: VHT capa missing from AssocResp\n");
2948 }
2949 if (!elems.vht_operation && bss_elems.vht_operation &&
2950 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2951 elems.vht_operation = bss_elems.vht_operation;
2952 sdata_info(sdata,
2953 "AP bug: VHT operation missing from AssocResp\n");
2954 }
2955 }
2956
30eb1dc2
JB		 2957 /*
2958 * We previously checked these in the beacon/probe response, so
2959 * they should be present here. This is just a safety net.
2960 */
2961 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2962 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2963 sdata_info(sdata,
35d865af
JB		 2964 "HT AP is missing WMM params or HT capability/operation\n");
2965 ret = false;
2966 goto out;
30eb1dc2
JB		 2967 }
2968
2969 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2970 (!elems.vht_cap_elem || !elems.vht_operation)) {
2971 sdata_info(sdata,
35d865af
JB		 2972 "VHT AP is missing VHT capability/operation\n");
2973 ret = false;
2974 goto out;
30eb1dc2
JB		 2975 }
2976
2a33bee2
GE		 2977 mutex_lock(&sdata->local->sta_mtx);
2978 /*
2979 * station info was already allocated and inserted before
2980 * the association and should be available to us
2981 */
7852e361 2982 sta = sta_info_get(sdata, cbss->bssid);
2a33bee2
GE		 2983 if (WARN_ON(!sta)) {
2984 mutex_unlock(&sdata->local->sta_mtx);
35d865af
JB		 2985 ret = false;
2986 goto out;
77fdaa12 2987 }
05e5e883 2988
21a8e9dd
MSS		 2989 sband = ieee80211_get_sband(sdata);
2990 if (!sband) {
2991 mutex_unlock(&sdata->local->sta_mtx);
2992 ret = false;
2993 goto out;
2994 }
f709fc69 2995
30eb1dc2 2996 /* Set up internal HT/VHT capabilities */
a8243b72 2997 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
ef96a842 2998 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
e1a0c6b3 2999 elems.ht_cap_elem, sta);
64f68e5d 3000
818255ea
MP		 3001 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
3002 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
4a34215e 3003 elems.vht_cap_elem, sta);
818255ea 3004
30eb1dc2
JB		 3005 /*
3006 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
3007 * in their association response, so ignore that data for our own
3008 * configuration. If it changed since the last beacon, we'll get the
3009 * next beacon and update then.
3010 */
1128958d 3011
bee7f586
JB		 3012 /*
3013 * If an operating mode notification IE is present, override the
3014 * NSS calculation (that would be done in rate_control_rate_init())
3015 * and use the # of streams from that element.
3016 */
3017 if (elems.opmode_notif &&
3018 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
3019 u8 nss;
3020
3021 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
3022 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
3023 nss += 1;
3024 sta->sta.rx_nss = nss;
3025 }
3026
4b7679a5 3027 rate_control_rate_init(sta);
f0706e82 3028
93f0490e 3029 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) {
c2c98fde 3030 set_sta_flag(sta, WLAN_STA_MFP);
93f0490e
T		 3031 sta->sta.mfp = true;
3032 } else {
3033 sta->sta.mfp = false;
3034 }
5394af4d 3035
527871d7 3036 sta->sta.wme = elems.wmm_param && local->hw.queues >= IEEE80211_NUM_ACS;
ddf4ac53 3037
3e4d40fa 3038 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
c8987876
JB		 3039 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
3040 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
3041 if (err) {
bdcbd8e0
JB		 3042 sdata_info(sdata,
3043 "failed to move station %pM to desired state\n",
3044 sta->sta.addr);
c8987876
JB		 3045 WARN_ON(__sta_info_destroy(sta));
3046 mutex_unlock(&sdata->local->sta_mtx);
35d865af
JB		 3047 ret = false;
3048 goto out;
c8987876
JB		 3049 }
3050
7852e361 3051 mutex_unlock(&sdata->local->sta_mtx);
ddf4ac53 3052
f2176d72
JO		 3053 /*
3054 * Always handle WMM once after association regardless
3055 * of the first value the AP uses. Setting -1 here has
3056 * that effect because the AP values is an unsigned
3057 * 4-bit value.
3058 */
3059 ifmgd->wmm_last_param_set = -1;
3060
2ed77ea6 3061 if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
cec66283 3062 ieee80211_set_wmm_default(sdata, false, false);
2ed77ea6
JB		 3063 } else if (!ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3064 elems.wmm_param_len)) {
3065 /* still enable QoS since we might have HT/VHT */
3066 ieee80211_set_wmm_default(sdata, false, true);
3067 /* set the disable-WMM flag in this case to disable
3068 * tracking WMM parameter changes in the beacon if
3069 * the parameters weren't actually valid. Doing so
3070 * avoids changing parameters very strangely when
3071 * the AP is going back and forth between valid and
3072 * invalid parameters.
3073 */
3074 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
3075 }
3abead59 3076 changed |= BSS_CHANGED_QOS;
f0706e82 3077
e38a017b
AS		 3078 if (elems.max_idle_period_ie) {
3079 bss_conf->max_idle_period =
3080 le16_to_cpu(elems.max_idle_period_ie->max_idle_period);
3081 bss_conf->protected_keep_alive =
3082 !!(elems.max_idle_period_ie->idle_options &
3083 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE);
3084 changed |= BSS_CHANGED_KEEP_ALIVE;
3085 } else {
3086 bss_conf->max_idle_period = 0;
3087 bss_conf->protected_keep_alive = false;
3088 }
3089
60f8b39c
JB		 3090 /* set AID and assoc capability,
3091 * ieee80211_set_associated() will tell the driver */
3092 bss_conf->aid = aid;
3093 bss_conf->assoc_capability = capab_info;
0c1ad2ca 3094 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 3095
d524215f
FF		 3096 /*
3097 * If we're using 4-addr mode, let the AP know that we're
3098 * doing so, so that it can create the STA VLAN on its side
3099 */
3100 if (ifmgd->use_4addr)
3101 ieee80211_send_4addr_nullfunc(local, sdata);
3102
15b7b062 3103 /*
b291ba11
JB		 3104 * Start timer to probe the connection to the AP now.
3105 * Also start the timer that will detect beacon loss.
15b7b062 3106 */
b291ba11 3107 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 3108 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 3109
35d865af
JB		 3110 ret = true;
3111 out:
3112 kfree(bss_ies);
3113 return ret;
f0706e82
JB		 3114}
3115
8d61ffa5
JB		 3116static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
3117 struct ieee80211_mgmt *mgmt,
3118 size_t len)
66e67e41
JB		 3119{
3120 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3121 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3122 u16 capab_info, status_code, aid;
3123 struct ieee802_11_elems elems;
b0b6aa2c 3124 int ac, uapsd_queues = -1;
66e67e41
JB		 3125 u8 *pos;
3126 bool reassoc;
8d61ffa5 3127 struct cfg80211_bss *bss;
d0d1a12f
EG		 3128 struct ieee80211_event event = {
3129 .type = MLME_EVENT,
3130 .u.mlme.data = ASSOC_EVENT,
3131 };
66e67e41 3132
8d61ffa5 3133 sdata_assert_lock(sdata);
66e67e41
JB		 3134
3135 if (!assoc_data)
8d61ffa5 3136 return;
b203ca39 3137 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
8d61ffa5 3138 return;
66e67e41
JB		 3139
3140 /*
3141 * AssocResp and ReassocResp have identical structure, so process both
3142 * of them in this function.
3143 */
3144
3145 if (len < 24 + 6)
8d61ffa5 3146 return;
66e67e41 3147
7a7d3e4c 3148 reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control);
66e67e41
JB		 3149 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3150 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
3151 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3152
bdcbd8e0
JB		 3153 sdata_info(sdata,
3154 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3155 reassoc ? "Rea" : "A", mgmt->sa,
3156 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
66e67e41 3157
39404fee
JM		 3158 if (assoc_data->fils_kek_len &&
3159 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0)
3160 return;
3161
66e67e41 3162 pos = mgmt->u.assoc_resp.variable;
b2e506bf 3163 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
66e67e41
JB		 3164
3165 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
79ba1d89
JB		 3166 elems.timeout_int &&
3167 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
66e67e41 3168 u32 tu, ms;
79ba1d89 3169 tu = le32_to_cpu(elems.timeout_int->value);
66e67e41 3170 ms = tu * 1024 / 1000;
bdcbd8e0
JB		 3171 sdata_info(sdata,
3172 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3173 mgmt->sa, tu, ms);
66e67e41 3174 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
89afe614 3175 assoc_data->timeout_started = true;
66e67e41 3176 if (ms > IEEE80211_ASSOC_TIMEOUT)
8d61ffa5
JB		 3177 run_again(sdata, assoc_data->timeout);
3178 return;
66e67e41
JB		 3179 }
3180
8d61ffa5 3181 bss = assoc_data->bss;
66e67e41
JB		 3182
3183 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 3184 sdata_info(sdata, "%pM denied association (code=%d)\n",
3185 mgmt->sa, status_code);
e6f462df 3186 ieee80211_destroy_assoc_data(sdata, false, false);
d0d1a12f
EG		 3187 event.u.mlme.status = MLME_DENIED;
3188 event.u.mlme.reason = status_code;
3189 drv_event_callback(sdata->local, sdata, &event);
66e67e41 3190 } else {
8d61ffa5 3191 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
66e67e41 3192 /* oops -- internal error -- send timeout for now */
e6f462df 3193 ieee80211_destroy_assoc_data(sdata, false, false);
959867fa 3194 cfg80211_assoc_timeout(sdata->dev, bss);
8d61ffa5 3195 return;
66e67e41 3196 }
d0d1a12f
EG		 3197 event.u.mlme.status = MLME_SUCCESS;
3198 drv_event_callback(sdata->local, sdata, &event);
635d999f 3199 sdata_info(sdata, "associated\n");
79ebfb85
JB		 3200
3201 /*
3202 * destroy assoc_data afterwards, as otherwise an idle
3203 * recalc after assoc_data is NULL but before associated
3204 * is set can cause the interface to go idle
3205 */
e6f462df 3206 ieee80211_destroy_assoc_data(sdata, true, false);
b0b6aa2c
EP		 3207
3208 /* get uapsd queues configuration */
3209 uapsd_queues = 0;
3210 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
3211 if (sdata->tx_conf[ac].uapsd)
f438ceb8 3212 uapsd_queues |= ieee80211_ac_to_qos_mask[ac];
66e67e41
JB		 3213 }
3214
b0b6aa2c 3215 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues);
66e67e41 3216}
8e3c1b77 3217
98c8fccf 3218static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
8e3c1b77 3219 struct ieee80211_mgmt *mgmt, size_t len,
98c8fccf 3220 struct ieee80211_rx_status *rx_status,
d45c4172 3221 struct ieee802_11_elems *elems)
98c8fccf
JB		 3222{
3223 struct ieee80211_local *local = sdata->local;
c2b13452 3224 struct ieee80211_bss *bss;
98c8fccf 3225 struct ieee80211_channel *channel;
56007a02 3226
8d61ffa5 3227 sdata_assert_lock(sdata);
b4f286a1 3228
3afc2167
EG		 3229 channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
3230 if (!channel)
98c8fccf
JB		 3231 return;
3232
98c8fccf 3233 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
d45c4172 3234 channel);
817cee76 3235 if (bss) {
817cee76 3236 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
d2722f8b 3237 ieee80211_rx_bss_put(local, bss);
817cee76 3238 }
f0706e82
JB		 3239}
3240
3241
f698d856 3242static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 3243 struct sk_buff *skb)
f0706e82 3244{
af6b6374 3245 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 3246 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 3247 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
3248 size_t baselen, len = skb->len;
ae6a44e3
EK		 3249 struct ieee802_11_elems elems;
3250
15b7b062
KV		 3251 ifmgd = &sdata->u.mgd;
3252
8d61ffa5 3253 sdata_assert_lock(sdata);
77fdaa12 3254
b203ca39 3255 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
8e7cdbb6
TW		 3256 return; /* ignore ProbeResp to foreign address */
3257
ae6a44e3
EK		 3258 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
3259 if (baselen > len)
3260 return;
3261
3262 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
b2e506bf 3263 false, &elems);
ae6a44e3 3264
d45c4172 3265 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
9859b81e 3266
77fdaa12 3267 if (ifmgd->associated &&
b203ca39 3268 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
4e5ff376 3269 ieee80211_reset_ap_probe(sdata);
f0706e82
JB		 3270}
3271
d91f36db
JB		 3272/*
3273 * This is the canonical list of information elements we care about,
3274 * the filter code also gives us all changes to the Microsoft OUI
c8d65917
SG		 3275 * (00:50:F2) vendor IE which is used for WMM which we need to track,
3276 * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3277 * changes to requested client power.
d91f36db
JB		 3278 *
3279 * We implement beacon filtering in software since that means we can
3280 * avoid processing the frame here and in cfg80211, and userspace
3281 * will not be able to tell whether the hardware supports it or not.
3282 *
3283 * XXX: This list needs to be dynamic -- userspace needs to be able to
3284 * add items it requires. It also needs to be able to tell us to
3285 * look out for other vendor IEs.
3286 */
3287static const u64 care_about_ies =
1d4df3a5
JB		 3288 (1ULL << WLAN_EID_COUNTRY) |
3289 (1ULL << WLAN_EID_ERP_INFO) |
3290 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
3291 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
3292 (1ULL << WLAN_EID_HT_CAPABILITY) |
70a3fd6c
JB		 3293 (1ULL << WLAN_EID_HT_OPERATION) |
3294 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN);
d91f36db 3295
8d61ffa5
JB		 3296static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
3297 struct ieee80211_mgmt *mgmt, size_t len,
3298 struct ieee80211_rx_status *rx_status)
f0706e82 3299{
d91f36db 3300 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 3301 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 3302 size_t baselen;
3303 struct ieee802_11_elems elems;
f698d856 3304 struct ieee80211_local *local = sdata->local;
55de908a
JB		 3305 struct ieee80211_chanctx_conf *chanctx_conf;
3306 struct ieee80211_channel *chan;
bee7f586 3307 struct sta_info *sta;
471b3efd 3308 u32 changed = 0;
f87ad637 3309 bool erp_valid;
7a5158ef 3310 u8 erp_value = 0;
d91f36db 3311 u32 ncrc;
77fdaa12 3312 u8 *bssid;
8d61ffa5 3313 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
77fdaa12 3314
8d61ffa5 3315 sdata_assert_lock(sdata);
f0706e82 3316
ae6a44e3
EK		 3317 /* Process beacon from the current BSS */
3318 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3319 if (baselen > len)
8d61ffa5 3320 return;
ae6a44e3 3321
55de908a
JB		 3322 rcu_read_lock();
3323 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3324 if (!chanctx_conf) {
3325 rcu_read_unlock();
8d61ffa5 3326 return;
55de908a
JB		 3327 }
3328
4bf88530 3329 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
55de908a 3330 rcu_read_unlock();
8d61ffa5 3331 return;
55de908a 3332 }
4bf88530 3333 chan = chanctx_conf->def.chan;
55de908a 3334 rcu_read_unlock();
f0706e82 3335
c65dd147 3336 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
b203ca39 3337 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
66e67e41 3338 ieee802_11_parse_elems(mgmt->u.beacon.variable,
b2e506bf 3339 len - baselen, false, &elems);
77fdaa12 3340
d45c4172 3341 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
482a9c74
AB		 3342 if (elems.tim && !elems.parse_error) {
3343 const struct ieee80211_tim_ie *tim_ie = elems.tim;
3344 ifmgd->dtim_period = tim_ie->dtim_period;
3345 }
989c6505 3346 ifmgd->have_beacon = true;
c65dd147 3347 ifmgd->assoc_data->need_beacon = false;
30686bf7 3348 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
ef429dad
JB		 3349 sdata->vif.bss_conf.sync_tsf =
3350 le64_to_cpu(mgmt->u.beacon.timestamp);
3351 sdata->vif.bss_conf.sync_device_ts =
3352 rx_status->device_timestamp;
3353 if (elems.tim)
3354 sdata->vif.bss_conf.sync_dtim_count =
3355 elems.tim->dtim_count;
3356 else
3357 sdata->vif.bss_conf.sync_dtim_count = 0;
3358 }
66e67e41
JB		 3359 /* continue assoc process */
3360 ifmgd->assoc_data->timeout = jiffies;
89afe614 3361 ifmgd->assoc_data->timeout_started = true;
8d61ffa5
JB		 3362 run_again(sdata, ifmgd->assoc_data->timeout);
3363 return;
66e67e41 3364 }
77fdaa12 3365
66e67e41 3366 if (!ifmgd->associated ||
b203ca39 3367 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
8d61ffa5 3368 return;
66e67e41 3369 bssid = ifmgd->associated->bssid;
f0706e82 3370
17e4ec14 3371 /* Track average RSSI from the Beacon frames of the current AP */
17e4ec14
JM		 3372 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3373 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
338c17ae 3374 ewma_beacon_signal_init(&ifmgd->ave_beacon_signal);
17e4ec14 3375 ifmgd->last_cqm_event_signal = 0;
391a200a 3376 ifmgd->count_beacon_signal = 1;
615f7b9b 3377 ifmgd->last_ave_beacon_signal = 0;
17e4ec14 3378 } else {
391a200a 3379 ifmgd->count_beacon_signal++;
17e4ec14 3380 }
615f7b9b 3381
338c17ae
JB		 3382 ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal);
3383
615f7b9b
MV		 3384 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3385 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
338c17ae 3386 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
615f7b9b 3387 int last_sig = ifmgd->last_ave_beacon_signal;
a8182929
EG		 3388 struct ieee80211_event event = {
3389 .type = RSSI_EVENT,
3390 };
615f7b9b
MV		 3391
3392 /*
3393 * if signal crosses either of the boundaries, invoke callback
3394 * with appropriate parameters
3395 */
3396 if (sig > ifmgd->rssi_max_thold &&
3397 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3398 ifmgd->last_ave_beacon_signal = sig;
a8182929
EG		 3399 event.u.rssi.data = RSSI_EVENT_HIGH;
3400 drv_event_callback(local, sdata, &event);
615f7b9b
MV		 3401 } else if (sig < ifmgd->rssi_min_thold &&
3402 (last_sig >= ifmgd->rssi_max_thold ||
3403 last_sig == 0)) {
3404 ifmgd->last_ave_beacon_signal = sig;
a8182929
EG		 3405 event.u.rssi.data = RSSI_EVENT_LOW;
3406 drv_event_callback(local, sdata, &event);
615f7b9b
MV		 3407 }
3408 }
3409
17e4ec14 3410 if (bss_conf->cqm_rssi_thold &&
391a200a 3411 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
ea086359 3412 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
338c17ae 3413 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
17e4ec14
JM		 3414 int last_event = ifmgd->last_cqm_event_signal;
3415 int thold = bss_conf->cqm_rssi_thold;
3416 int hyst = bss_conf->cqm_rssi_hyst;
338c17ae 3417
17e4ec14
JM		 3418 if (sig < thold &&
3419 (last_event == 0 || sig < last_event - hyst)) {
3420 ifmgd->last_cqm_event_signal = sig;
3421 ieee80211_cqm_rssi_notify(
3422 &sdata->vif,
3423 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
769f07d8 3424 sig, GFP_KERNEL);
17e4ec14
JM		 3425 } else if (sig > thold &&
3426 (last_event == 0 || sig > last_event + hyst)) {
3427 ifmgd->last_cqm_event_signal = sig;
3428 ieee80211_cqm_rssi_notify(
3429 &sdata->vif,
3430 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
769f07d8 3431 sig, GFP_KERNEL);
17e4ec14
JM		 3432 }
3433 }
3434
2c3c5f8c
AZ		 3435 if (bss_conf->cqm_rssi_low &&
3436 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3437 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3438 int last_event = ifmgd->last_cqm_event_signal;
3439 int low = bss_conf->cqm_rssi_low;
3440 int high = bss_conf->cqm_rssi_high;
3441
3442 if (sig < low &&
3443 (last_event == 0 || last_event >= low)) {
3444 ifmgd->last_cqm_event_signal = sig;
3445 ieee80211_cqm_rssi_notify(
3446 &sdata->vif,
3447 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3448 sig, GFP_KERNEL);
3449 } else if (sig > high &&
3450 (last_event == 0 || last_event <= high)) {
3451 ifmgd->last_cqm_event_signal = sig;
3452 ieee80211_cqm_rssi_notify(
3453 &sdata->vif,
3454 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3455 sig, GFP_KERNEL);
3456 }
3457 }
3458
392b9ffb 3459 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
bdcbd8e0 3460 mlme_dbg_ratelimited(sdata,
112c31f0 3461 "cancelling AP probe due to a received beacon\n");
392b9ffb 3462 ieee80211_reset_ap_probe(sdata);
92778180
JM		 3463 }
3464
b291ba11
JB		 3465 /*
3466 * Push the beacon loss detection into the future since
3467 * we are processing a beacon from the AP just now.
3468 */
d3a910a8 3469 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 3470
d91f36db
JB		 3471 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3472 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
b2e506bf 3473 len - baselen, false, &elems,
d91f36db
JB		 3474 care_about_ies, ncrc);
3475
90d13e8f
JB		 3476 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
3477 ieee80211_check_tim(elems.tim, elems.tim_len, ifmgd->aid)) {
3478 if (local->hw.conf.dynamic_ps_timeout > 0) {
3479 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3480 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3481 ieee80211_hw_config(local,
3482 IEEE80211_CONF_CHANGE_PS);
572e0012 3483 }
076cdcb1 3484 ieee80211_send_nullfunc(local, sdata, false);
90d13e8f
JB		 3485 } else if (!local->pspolling && sdata->u.mgd.powersave) {
3486 local->pspolling = true;
3487
3488 /*
3489 * Here is assumed that the driver will be
3490 * able to send ps-poll frame and receive a
3491 * response even though power save mode is
3492 * enabled, but some drivers might require
3493 * to disable power save here. This needs
3494 * to be investigated.
3495 */
3496 ieee80211_send_pspoll(local, sdata);
a97b77b9
VN		 3497 }
3498 }
7a5158ef 3499
b115b972
JD		 3500 if (sdata->vif.p2p ||
3501 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
67baf663 3502 struct ieee80211_p2p_noa_attr noa = {};
488dd7b5
JB		 3503 int ret;
3504
3505 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3506 len - baselen,
3507 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
934457ee 3508 (u8 *) &noa, sizeof(noa));
67baf663
JD		 3509 if (ret >= 2) {
3510 if (sdata->u.mgd.p2p_noa_index != noa.index) {
3511 /* valid noa_attr and index changed */
3512 sdata->u.mgd.p2p_noa_index = noa.index;
3513 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3514 changed |= BSS_CHANGED_P2P_PS;
3515 /*
3516 * make sure we update all information, the CRC
3517 * mechanism doesn't look at P2P attributes.
3518 */
3519 ifmgd->beacon_crc_valid = false;
3520 }
3521 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3522 /* noa_attr not found and we had valid noa_attr before */
3523 sdata->u.mgd.p2p_noa_index = -1;
3524 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
488dd7b5 3525 changed |= BSS_CHANGED_P2P_PS;
488dd7b5
JB		 3526 ifmgd->beacon_crc_valid = false;
3527 }
3528 }
3529
0c21e632
LC		 3530 if (ifmgd->csa_waiting_bcn)
3531 ieee80211_chswitch_post_beacon(sdata);
3532
2ecc3905
AB		 3533 /*
3534 * Update beacon timing and dtim count on every beacon appearance. This
3535 * will allow the driver to use the most updated values. Do it before
3536 * comparing this one with last received beacon.
3537 * IMPORTANT: These parameters would possibly be out of sync by the time
3538 * the driver will use them. The synchronized view is currently
3539 * guaranteed only in certain callbacks.
3540 */
30686bf7 3541 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
2ecc3905
AB		 3542 sdata->vif.bss_conf.sync_tsf =
3543 le64_to_cpu(mgmt->u.beacon.timestamp);
3544 sdata->vif.bss_conf.sync_device_ts =
3545 rx_status->device_timestamp;
3546 if (elems.tim)
3547 sdata->vif.bss_conf.sync_dtim_count =
3548 elems.tim->dtim_count;
3549 else
3550 sdata->vif.bss_conf.sync_dtim_count = 0;
3551 }
3552
d8ec4433 3553 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
8d61ffa5 3554 return;
30196673 3555 ifmgd->beacon_crc = ncrc;
d8ec4433 3556 ifmgd->beacon_crc_valid = true;
30196673 3557
d45c4172 3558 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
7d25745d 3559
d70b7616 3560 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
2ba45384 3561 rx_status->device_timestamp,
d70b7616
JB		 3562 &elems, true);
3563
095d81ce
JB		 3564 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3565 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
7d25745d
JB		 3566 elems.wmm_param_len))
3567 changed |= BSS_CHANGED_QOS;
3568
c65dd147
EG		 3569 /*
3570 * If we haven't had a beacon before, tell the driver about the
ef429dad 3571 * DTIM period (and beacon timing if desired) now.
c65dd147 3572 */
989c6505 3573 if (!ifmgd->have_beacon) {
c65dd147
EG		 3574 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3575 if (elems.tim)
3576 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3577 else
3578 bss_conf->dtim_period = 1;
ef429dad 3579
989c6505
AB		 3580 changed |= BSS_CHANGED_BEACON_INFO;
3581 ifmgd->have_beacon = true;
482a9c74
AB		 3582
3583 mutex_lock(&local->iflist_mtx);
4a733ef1 3584 ieee80211_recalc_ps(local);
482a9c74
AB		 3585 mutex_unlock(&local->iflist_mtx);
3586
ce857888 3587 ieee80211_recalc_ps_vif(sdata);
c65dd147
EG		 3588 }
3589
1946bed9 3590 if (elems.erp_info) {
7a5158ef
JB		 3591 erp_valid = true;
3592 erp_value = elems.erp_info[0];
3593 } else {
3594 erp_valid = false;
50c4afb9 3595 }
7a5158ef
JB		 3596 changed |= ieee80211_handle_bss_capability(sdata,
3597 le16_to_cpu(mgmt->u.beacon.capab_info),
3598 erp_valid, erp_value);
f0706e82 3599
1128958d 3600 mutex_lock(&local->sta_mtx);
bee7f586
JB		 3601 sta = sta_info_get(sdata, bssid);
3602
53b954ee
EP		 3603 if (ieee80211_config_bw(sdata, sta,
3604 elems.ht_cap_elem, elems.ht_operation,
30eb1dc2
JB		 3605 elems.vht_operation, bssid, &changed)) {
3606 mutex_unlock(&local->sta_mtx);
89f774e6
JB		 3607 sdata_info(sdata,
3608 "failed to follow AP %pM bandwidth change, disconnect\n",
3609 bssid);
30eb1dc2
JB		 3610 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3611 WLAN_REASON_DEAUTH_LEAVING,
3612 true, deauth_buf);
a90faa9d
EG		 3613 ieee80211_report_disconnect(sdata, deauth_buf,
3614 sizeof(deauth_buf), true,
3615 WLAN_REASON_DEAUTH_LEAVING);
8d61ffa5 3616 return;
30eb1dc2 3617 }
bee7f586
JB		 3618
3619 if (sta && elems.opmode_notif)
3620 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
cf1e05c6 3621 rx_status->band);
1128958d 3622 mutex_unlock(&local->sta_mtx);
d3c990fb 3623
24a4e400
SG		 3624 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
3625 elems.country_elem,
3626 elems.country_elem_len,
c8d65917
SG		 3627 elems.pwr_constr_elem,
3628 elems.cisco_dtpc_elem);
3f2355cb 3629
471b3efd 3630 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 3631}
3632
1fa57d01
JB		 3633void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3634 struct sk_buff *skb)
f0706e82
JB		 3635{
3636 struct ieee80211_rx_status *rx_status;
f0706e82
JB		 3637 struct ieee80211_mgmt *mgmt;
3638 u16 fc;
1b3a2e49
JB		 3639 struct ieee802_11_elems elems;
3640 int ies_len;
f0706e82 3641
f0706e82
JB		 3642 rx_status = (struct ieee80211_rx_status *) skb->cb;
3643 mgmt = (struct ieee80211_mgmt *) skb->data;
3644 fc = le16_to_cpu(mgmt->frame_control);
3645
8d61ffa5 3646 sdata_lock(sdata);
77fdaa12 3647
66e67e41
JB		 3648 switch (fc & IEEE80211_FCTL_STYPE) {
3649 case IEEE80211_STYPE_BEACON:
8d61ffa5 3650 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
66e67e41
JB		 3651 break;
3652 case IEEE80211_STYPE_PROBE_RESP:
3653 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3654 break;
3655 case IEEE80211_STYPE_AUTH:
8d61ffa5 3656 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
66e67e41
JB		 3657 break;
3658 case IEEE80211_STYPE_DEAUTH:
8d61ffa5 3659 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
66e67e41
JB		 3660 break;
3661 case IEEE80211_STYPE_DISASSOC:
8d61ffa5 3662 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
66e67e41
JB		 3663 break;
3664 case IEEE80211_STYPE_ASSOC_RESP:
3665 case IEEE80211_STYPE_REASSOC_RESP:
8d61ffa5 3666 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
66e67e41
JB		 3667 break;
3668 case IEEE80211_STYPE_ACTION:
37799e52 3669 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
1b3a2e49
JB		 3670 ies_len = skb->len -
3671 offsetof(struct ieee80211_mgmt,
3672 u.action.u.chan_switch.variable);
37799e52
JB		 3673
3674 if (ies_len < 0)
3675 break;
3676
3677 ieee802_11_parse_elems(
3678 mgmt->u.action.u.chan_switch.variable,
b2e506bf 3679 ies_len, true, &elems);
37799e52
JB		 3680
3681 if (elems.parse_error)
3682 break;
3683
1b3a2e49 3684 ieee80211_sta_process_chanswitch(sdata,
2ba45384
LC		 3685 rx_status->mactime,
3686 rx_status->device_timestamp,
3687 &elems, false);
1b3a2e49
JB		 3688 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3689 ies_len = skb->len -
3690 offsetof(struct ieee80211_mgmt,
3691 u.action.u.ext_chan_switch.variable);
3692
3693 if (ies_len < 0)
3694 break;
3695
3696 ieee802_11_parse_elems(
3697 mgmt->u.action.u.ext_chan_switch.variable,
b2e506bf 3698 ies_len, true, &elems);
1b3a2e49
JB		 3699
3700 if (elems.parse_error)
3701 break;
3702
3703 /* for the handling code pretend this was also an IE */
3704 elems.ext_chansw_ie =
3705 &mgmt->u.action.u.ext_chan_switch.data;
3706
66e67e41 3707 ieee80211_sta_process_chanswitch(sdata,
2ba45384
LC		 3708 rx_status->mactime,
3709 rx_status->device_timestamp,
3710 &elems, false);
77fdaa12 3711 }
37799e52 3712 break;
77fdaa12 3713 }
8d61ffa5 3714 sdata_unlock(sdata);
f0706e82
JB		 3715}
3716
34f11cd3 3717static void ieee80211_sta_timer(struct timer_list *t)
f0706e82 3718{
60f8b39c 3719 struct ieee80211_sub_if_data *sdata =
34f11cd3 3720 from_timer(sdata, t, u.mgd.timer);
5bb644a0 3721
9b7d72c1 3722 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
f0706e82
JB		 3723}
3724
04ac3c0e 3725static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
6b684db1 3726 u8 *bssid, u8 reason, bool tx)
04ac3c0e 3727{
6ae16775 3728 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
04ac3c0e 3729
37ad3888 3730 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
6b684db1 3731 tx, frame_buf);
37ad3888 3732
a90faa9d
EG		 3733 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
3734 reason);
04ac3c0e
FF		 3735}
3736
46cad4b7 3737static int ieee80211_auth(struct ieee80211_sub_if_data *sdata)
66e67e41
JB		 3738{
3739 struct ieee80211_local *local = sdata->local;
3740 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3741 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
1672c0e3 3742 u32 tx_flags = 0;
46cad4b7
JB		 3743 u16 trans = 1;
3744 u16 status = 0;
66e67e41 3745
8d61ffa5 3746 sdata_assert_lock(sdata);
66e67e41
JB		 3747
3748 if (WARN_ON_ONCE(!auth_data))
3749 return -EINVAL;
3750
66e67e41
JB		 3751 auth_data->tries++;
3752
3753 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
bdcbd8e0
JB		 3754 sdata_info(sdata, "authentication with %pM timed out\n",
3755 auth_data->bss->bssid);
66e67e41
JB		 3756
3757 /*
3758 * Most likely AP is not in the range so remove the
3759 * bss struct for that AP.
3760 */
3761 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3762
3763 return -ETIMEDOUT;
3764 }
3765
a1845fc7
JB		 3766 drv_mgd_prepare_tx(local, sdata);
3767
46cad4b7
JB		 3768 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3769 auth_data->bss->bssid, auth_data->tries,
3770 IEEE80211_AUTH_MAX_TRIES);
66e67e41 3771
46cad4b7 3772 auth_data->expected_transaction = 2;
6b8ece3a 3773
46cad4b7
JB		 3774 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3775 trans = auth_data->sae_trans;
3776 status = auth_data->sae_status;
3777 auth_data->expected_transaction = trans;
3778 }
66e67e41 3779
46cad4b7
JB		 3780 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
3781 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3782 IEEE80211_TX_INTFL_MLME_CONN_TX;
66e67e41 3783
46cad4b7
JB		 3784 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3785 auth_data->data, auth_data->data_len,
3786 auth_data->bss->bssid,
3787 auth_data->bss->bssid, NULL, 0, 0,
3788 tx_flags);
66e67e41 3789
6211dd12 3790 if (tx_flags == 0) {
1672c0e3 3791 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
cb236d2d 3792 auth_data->timeout_started = true;
8d61ffa5 3793 run_again(sdata, auth_data->timeout);
89afe614 3794 } else {
cb236d2d
JB		 3795 auth_data->timeout =
3796 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3797 auth_data->timeout_started = true;
3798 run_again(sdata, auth_data->timeout);
1672c0e3 3799 }
66e67e41
JB		 3800
3801 return 0;
3802}
3803
3804static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3805{
3806 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3807 struct ieee80211_local *local = sdata->local;
3808
8d61ffa5 3809 sdata_assert_lock(sdata);
66e67e41 3810
66e67e41
JB		 3811 assoc_data->tries++;
3812 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
bdcbd8e0
JB		 3813 sdata_info(sdata, "association with %pM timed out\n",
3814 assoc_data->bss->bssid);
66e67e41
JB		 3815
3816 /*
3817 * Most likely AP is not in the range so remove the
3818 * bss struct for that AP.
3819 */
3820 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3821
3822 return -ETIMEDOUT;
3823 }
3824
bdcbd8e0
JB		 3825 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3826 assoc_data->bss->bssid, assoc_data->tries,
3827 IEEE80211_ASSOC_MAX_TRIES);
66e67e41
JB		 3828 ieee80211_send_assoc(sdata);
3829
30686bf7 3830 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
1672c0e3 3831 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
89afe614 3832 assoc_data->timeout_started = true;
8d61ffa5 3833 run_again(sdata, assoc_data->timeout);
89afe614 3834 } else {
cb236d2d
JB		 3835 assoc_data->timeout =
3836 round_jiffies_up(jiffies +
3837 IEEE80211_ASSOC_TIMEOUT_LONG);
3838 assoc_data->timeout_started = true;
3839 run_again(sdata, assoc_data->timeout);
1672c0e3 3840 }
66e67e41
JB		 3841
3842 return 0;
3843}
3844
1672c0e3
JB		 3845void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3846 __le16 fc, bool acked)
3847{
3848 struct ieee80211_local *local = sdata->local;
3849
3850 sdata->u.mgd.status_fc = fc;
3851 sdata->u.mgd.status_acked = acked;
3852 sdata->u.mgd.status_received = true;
3853
3854 ieee80211_queue_work(&local->hw, &sdata->work);
3855}
3856
1fa57d01 3857void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 3858{
9c6bd790 3859 struct ieee80211_local *local = sdata->local;
1fa57d01 3860 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 3861
8d61ffa5 3862 sdata_lock(sdata);
77fdaa12 3863
1672c0e3
JB		 3864 if (ifmgd->status_received) {
3865 __le16 fc = ifmgd->status_fc;
3866 bool status_acked = ifmgd->status_acked;
3867
3868 ifmgd->status_received = false;
46cad4b7 3869 if (ifmgd->auth_data && ieee80211_is_auth(fc)) {
1672c0e3
JB		 3870 if (status_acked) {
3871 ifmgd->auth_data->timeout =
3872 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
8d61ffa5 3873 run_again(sdata, ifmgd->auth_data->timeout);
1672c0e3
JB		 3874 } else {
3875 ifmgd->auth_data->timeout = jiffies - 1;
3876 }
89afe614 3877 ifmgd->auth_data->timeout_started = true;
1672c0e3
JB		 3878 } else if (ifmgd->assoc_data &&
3879 (ieee80211_is_assoc_req(fc) ||
3880 ieee80211_is_reassoc_req(fc))) {
3881 if (status_acked) {
3882 ifmgd->assoc_data->timeout =
3883 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
8d61ffa5 3884 run_again(sdata, ifmgd->assoc_data->timeout);
1672c0e3
JB		 3885 } else {
3886 ifmgd->assoc_data->timeout = jiffies - 1;
3887 }
89afe614 3888 ifmgd->assoc_data->timeout_started = true;
1672c0e3
JB		 3889 }
3890 }
3891
89afe614 3892 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
66e67e41
JB		 3893 time_after(jiffies, ifmgd->auth_data->timeout)) {
3894 if (ifmgd->auth_data->done) {
3895 /*
3896 * ok ... we waited for assoc but userspace didn't,
3897 * so let's just kill the auth data
3898 */
3899 ieee80211_destroy_auth_data(sdata, false);
46cad4b7 3900 } else if (ieee80211_auth(sdata)) {
66e67e41 3901 u8 bssid[ETH_ALEN];
a9409093
EG		 3902 struct ieee80211_event event = {
3903 .type = MLME_EVENT,
3904 .u.mlme.data = AUTH_EVENT,
3905 .u.mlme.status = MLME_TIMEOUT,
3906 };
66e67e41
JB		 3907
3908 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3909
3910 ieee80211_destroy_auth_data(sdata, false);
3911
6ff57cf8 3912 cfg80211_auth_timeout(sdata->dev, bssid);
a9409093 3913 drv_event_callback(sdata->local, sdata, &event);
66e67e41 3914 }
89afe614 3915 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
8d61ffa5 3916 run_again(sdata, ifmgd->auth_data->timeout);
66e67e41 3917
89afe614 3918 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
66e67e41 3919 time_after(jiffies, ifmgd->assoc_data->timeout)) {
989c6505 3920 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
66e67e41 3921 ieee80211_do_assoc(sdata)) {
959867fa 3922 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
d0d1a12f
EG		 3923 struct ieee80211_event event = {
3924 .type = MLME_EVENT,
3925 .u.mlme.data = ASSOC_EVENT,
3926 .u.mlme.status = MLME_TIMEOUT,
3927 };
66e67e41 3928
e6f462df 3929 ieee80211_destroy_assoc_data(sdata, false, false);
959867fa 3930 cfg80211_assoc_timeout(sdata->dev, bss);
d0d1a12f 3931 drv_event_callback(sdata->local, sdata, &event);
66e67e41 3932 }
89afe614 3933 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
8d61ffa5 3934 run_again(sdata, ifmgd->assoc_data->timeout);
66e67e41 3935
392b9ffb 3936 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
b291ba11 3937 ifmgd->associated) {
a43abf29 3938 u8 bssid[ETH_ALEN];
72a8a3ed 3939 int max_tries;
a43abf29 3940
0c1ad2ca 3941 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 3942
30686bf7 3943 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
180205bd 3944 max_tries = max_nullfunc_tries;
72a8a3ed 3945 else
180205bd 3946 max_tries = max_probe_tries;
72a8a3ed 3947
4e5ff376
FF		 3948 /* ACK received for nullfunc probing frame */
3949 if (!ifmgd->probe_send_count)
3950 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 3951 else if (ifmgd->nullfunc_failed) {
3952 if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3953 mlme_dbg(sdata,
3954 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3955 bssid, ifmgd->probe_send_count,
3956 max_tries);
04ac3c0e
FF		 3957 ieee80211_mgd_probe_ap_send(sdata);
3958 } else {
bdcbd8e0
JB		 3959 mlme_dbg(sdata,
3960 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3961 bssid);
95acac61 3962 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1
JB		 3963 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3964 false);
04ac3c0e
FF		 3965 }
3966 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
8d61ffa5 3967 run_again(sdata, ifmgd->probe_timeout);
30686bf7 3968 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
bdcbd8e0
JB		 3969 mlme_dbg(sdata,
3970 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3971 bssid, probe_wait_ms);
95acac61 3972 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 3973 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
04ac3c0e 3974 } else if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3975 mlme_dbg(sdata,
3976 "No probe response from AP %pM after %dms, try %d/%i\n",
3977 bssid, probe_wait_ms,
3978 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 3979 ieee80211_mgd_probe_ap_send(sdata);
3980 } else {
b291ba11
JB		 3981 /*
3982 * We actually lost the connection ... or did we?
3983 * Let's make sure!
3984 */
89f774e6
JB		 3985 mlme_dbg(sdata,
3986 "No probe response from AP %pM after %dms, disconnecting.\n",
3987 bssid, probe_wait_ms);
04ac3c0e 3988
95acac61 3989 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 3990 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
b291ba11
JB		 3991 }
3992 }
3993
8d61ffa5 3994 sdata_unlock(sdata);
f0706e82
JB		 3995}
3996
34f11cd3 3997static void ieee80211_sta_bcn_mon_timer(struct timer_list *t)
b291ba11
JB		 3998{
3999 struct ieee80211_sub_if_data *sdata =
34f11cd3 4000 from_timer(sdata, t, u.mgd.bcn_mon_timer);
0c21e632 4001 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 4002
0c21e632 4003 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
e5593f56
MK		 4004 return;
4005
682bd38b 4006 sdata->u.mgd.connection_loss = false;
1e4dcd01
JO		 4007 ieee80211_queue_work(&sdata->local->hw,
4008 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 4009}
4010
34f11cd3 4011static void ieee80211_sta_conn_mon_timer(struct timer_list *t)
b291ba11
JB		 4012{
4013 struct ieee80211_sub_if_data *sdata =
34f11cd3 4014 from_timer(sdata, t, u.mgd.conn_mon_timer);
b291ba11
JB		 4015 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4016 struct ieee80211_local *local = sdata->local;
4017
0c21e632 4018 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
e5593f56
MK		 4019 return;
4020
42935eca 4021 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 4022}
4023
4024static void ieee80211_sta_monitor_work(struct work_struct *work)
4025{
4026 struct ieee80211_sub_if_data *sdata =
4027 container_of(work, struct ieee80211_sub_if_data,
4028 u.mgd.monitor_work);
4029
4030 ieee80211_mgd_probe_ap(sdata, false);
4031}
4032
9c6bd790
JB		 4033static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
4034{
ad935687 4035 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
925e64c3 4036 __ieee80211_stop_poll(sdata);
ad935687 4037
b291ba11 4038 /* let's probe the connection once */
30686bf7 4039 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
494f1fe5
EP		 4040 ieee80211_queue_work(&sdata->local->hw,
4041 &sdata->u.mgd.monitor_work);
ad935687 4042 }
9c6bd790 4043}
f0706e82 4044
b8360ab8 4045#ifdef CONFIG_PM
1a1cb744
JB		 4046void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
4047{
4048 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4049 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4050
4051 sdata_lock(sdata);
4052
c52666ae
EG		 4053 if (ifmgd->auth_data || ifmgd->assoc_data) {
4054 const u8 *bssid = ifmgd->auth_data ?
4055 ifmgd->auth_data->bss->bssid :
4056 ifmgd->assoc_data->bss->bssid;
4057
1a1cb744 4058 /*
c52666ae
EG		 4059 * If we are trying to authenticate / associate while suspending,
4060 * cfg80211 won't know and won't actually abort those attempts,
4061 * thus we need to do that ourselves.
1a1cb744 4062 */
c52666ae 4063 ieee80211_send_deauth_disassoc(sdata, bssid,
1a1cb744
JB		 4064 IEEE80211_STYPE_DEAUTH,
4065 WLAN_REASON_DEAUTH_LEAVING,
4066 false, frame_buf);
c52666ae 4067 if (ifmgd->assoc_data)
e6f462df 4068 ieee80211_destroy_assoc_data(sdata, false, true);
c52666ae
EG		 4069 if (ifmgd->auth_data)
4070 ieee80211_destroy_auth_data(sdata, false);
1a1cb744
JB		 4071 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4072 IEEE80211_DEAUTH_FRAME_LEN);
4073 }
4074
be72afe0
JB		 4075 /* This is a bit of a hack - we should find a better and more generic
4076 * solution to this. Normally when suspending, cfg80211 will in fact
4077 * deauthenticate. However, it doesn't (and cannot) stop an ongoing
4078 * auth (not so important) or assoc (this is the problem) process.
4079 *
4080 * As a consequence, it can happen that we are in the process of both
4081 * associating and suspending, and receive an association response
4082 * after cfg80211 has checked if it needs to disconnect, but before
4083 * we actually set the flag to drop incoming frames. This will then
4084 * cause the workqueue flush to process the association response in
4085 * the suspend, resulting in a successful association just before it
4086 * tries to remove the interface from the driver, which now though
4087 * has a channel context assigned ... this results in issues.
4088 *
4089 * To work around this (for now) simply deauth here again if we're
4090 * now connected.
4091 */
4092 if (ifmgd->associated && !sdata->local->wowlan) {
4093 u8 bssid[ETH_ALEN];
4094 struct cfg80211_deauth_request req = {
4095 .reason_code = WLAN_REASON_DEAUTH_LEAVING,
4096 .bssid = bssid,
4097 };
4098
4099 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4100 ieee80211_mgd_deauth(sdata, &req);
4101 }
4102
1a1cb744
JB		 4103 sdata_unlock(sdata);
4104}
4105
b8360ab8
JB		 4106void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
4107{
4108 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4109
8d61ffa5 4110 sdata_lock(sdata);
b8360ab8 4111 if (!ifmgd->associated) {
8d61ffa5 4112 sdata_unlock(sdata);
b8360ab8
JB		 4113 return;
4114 }
4115
4116 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
4117 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
4118 mlme_dbg(sdata, "driver requested disconnect after resume\n");
4119 ieee80211_sta_connection_lost(sdata,
4120 ifmgd->associated->bssid,
4121 WLAN_REASON_UNSPECIFIED,
4122 true);
8d61ffa5 4123 sdata_unlock(sdata);
b8360ab8
JB		 4124 return;
4125 }
8d61ffa5 4126 sdata_unlock(sdata);
b8360ab8
JB		 4127}
4128#endif
4129
9c6bd790
JB		 4130/* interface setup */
4131void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 4132{
46900298 4133 struct ieee80211_if_managed *ifmgd;
988c0f72 4134
46900298 4135 ifmgd = &sdata->u.mgd;
b291ba11 4136 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 4137 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 4138 INIT_WORK(&ifmgd->beacon_connection_loss_work,
4139 ieee80211_beacon_connection_loss_work);
882a7c69
JB		 4140 INIT_WORK(&ifmgd->csa_connection_drop_work,
4141 ieee80211_csa_connection_drop_work);
687da132 4142 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
81dd2b88
AN		 4143 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
4144 ieee80211_tdls_peer_del_work);
34f11cd3
KC		 4145 timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0);
4146 timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0);
4147 timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0);
4148 timer_setup(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, 0);
02219b3a
JB		 4149 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
4150 ieee80211_sta_handle_tspec_ac_params_wk);
9c6bd790 4151
ab1faead 4152 ifmgd->flags = 0;
1478acb3 4153 ifmgd->powersave = sdata->wdev.ps;
219c3867
AB		 4154 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
4155 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
67baf663 4156 ifmgd->p2p_noa_index = -1;
bbbdff9e 4157
0d8614b4 4158 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
0f78231b
JB		 4159 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
4160 else
4161 ifmgd->req_smps = IEEE80211_SMPS_OFF;
1277b4a9
LK		 4162
4163 /* Setup TDLS data */
4164 spin_lock_init(&ifmgd->teardown_lock);
4165 ifmgd->teardown_skb = NULL;
4166 ifmgd->orig_teardown_skb = NULL;
f0706e82
JB		 4167}
4168
77fdaa12
JB		 4169/* scan finished notification */
4170void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 4171{
31ee67a1 4172 struct ieee80211_sub_if_data *sdata;
60f8b39c 4173
77fdaa12
JB		 4174 /* Restart STA timers */
4175 rcu_read_lock();
370bd005
BG		 4176 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4177 if (ieee80211_sdata_running(sdata))
4178 ieee80211_restart_sta_timer(sdata);
4179 }
77fdaa12
JB		 4180 rcu_read_unlock();
4181}
60f8b39c 4182
f2d9d270
JB		 4183static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
4184 struct cfg80211_bss *cbss)
4185{
4186 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4187 const u8 *ht_cap_ie, *vht_cap_ie;
4188 const struct ieee80211_ht_cap *ht_cap;
4189 const struct ieee80211_vht_cap *vht_cap;
4190 u8 chains = 1;
4191
4192 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
4193 return chains;
4194
9caf0364 4195 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
f2d9d270
JB		 4196 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
4197 ht_cap = (void *)(ht_cap_ie + 2);
4198 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4199 /*
4200 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4201 * "Tx Unequal Modulation Supported" fields.
4202 */
4203 }
4204
4205 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
4206 return chains;
4207
9caf0364 4208 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
f2d9d270
JB		 4209 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
4210 u8 nss;
4211 u16 tx_mcs_map;
4212
4213 vht_cap = (void *)(vht_cap_ie + 2);
4214 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4215 for (nss = 8; nss > 0; nss--) {
4216 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4217 IEEE80211_VHT_MCS_NOT_SUPPORTED)
4218 break;
4219 }
4220 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4221 chains = max(chains, nss);
4222 }
4223
4224 return chains;
4225}
4226
b17166a7
JB		 4227static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4228 struct cfg80211_bss *cbss)
a1cf775d
JB		 4229{
4230 struct ieee80211_local *local = sdata->local;
4231 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
53b954ee 4232 const struct ieee80211_ht_cap *ht_cap = NULL;
24398e39 4233 const struct ieee80211_ht_operation *ht_oper = NULL;
f2d9d270 4234 const struct ieee80211_vht_operation *vht_oper = NULL;
24398e39 4235 struct ieee80211_supported_band *sband;
4bf88530 4236 struct cfg80211_chan_def chandef;
f2d9d270 4237 int ret;
52a45f38
AN		 4238 u32 i;
4239 bool have_80mhz;
a1cf775d 4240
24398e39
JB		 4241 sband = local->hw.wiphy->bands[cbss->channel->band];
4242
f2d9d270
JB		 4243 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
4244 IEEE80211_STA_DISABLE_80P80MHZ |
4245 IEEE80211_STA_DISABLE_160MHZ);
4246
9caf0364
JB		 4247 rcu_read_lock();
4248
f2d9d270
JB		 4249 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
4250 sband->ht_cap.ht_supported) {
53b954ee 4251 const u8 *ht_oper_ie, *ht_cap_ie;
24398e39 4252
9caf0364 4253 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
24398e39
JB		 4254 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
4255 ht_oper = (void *)(ht_oper_ie + 2);
08e6effa 4256
53b954ee
EP		 4257 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4258 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
4259 ht_cap = (void *)(ht_cap_ie + 2);
4260
4261 if (!ht_cap) {
08e6effa
JB		 4262 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4263 ht_oper = NULL;
4264 }
24398e39
JB		 4265 }
4266
f2d9d270
JB		 4267 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4268 sband->vht_cap.vht_supported) {
08e6effa 4269 const u8 *vht_oper_ie, *vht_cap;
f2d9d270 4270
9caf0364
JB		 4271 vht_oper_ie = ieee80211_bss_get_ie(cbss,
4272 WLAN_EID_VHT_OPERATION);
f2d9d270
JB		 4273 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
4274 vht_oper = (void *)(vht_oper_ie + 2);
4275 if (vht_oper && !ht_oper) {
4276 vht_oper = NULL;
bdcbd8e0 4277 sdata_info(sdata,
f2d9d270 4278 "AP advertised VHT without HT, disabling both\n");
cb145022
JB		 4279 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4280 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
24398e39 4281 }
08e6effa
JB		 4282
4283 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4284 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
4285 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4286 vht_oper = NULL;
4287 }
24398e39
JB		 4288 }
4289
52a45f38
AN		 4290 /* Allow VHT if at least one channel on the sband supports 80 MHz */
4291 have_80mhz = false;
4292 for (i = 0; i < sband->n_channels; i++) {
4293 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
4294 IEEE80211_CHAN_NO_80MHZ))
4295 continue;
4296
4297 have_80mhz = true;
4298 break;
4299 }
4300
4301 if (!have_80mhz)
4302 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4303
f2d9d270
JB		 4304 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
4305 cbss->channel,
b1b1ae2c 4306 ht_oper, vht_oper,
5cdaed1e 4307 &chandef, false);
04ecd257 4308
f2d9d270
JB		 4309 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
4310 local->rx_chains);
24398e39 4311
9caf0364
JB		 4312 rcu_read_unlock();
4313
04ecd257
JB		 4314 /* will change later if needed */
4315 sdata->smps_mode = IEEE80211_SMPS_OFF;
4316
34a3740d 4317 mutex_lock(&local->mtx);
f2d9d270
JB		 4318 /*
4319 * If this fails (possibly due to channel context sharing
4320 * on incompatible channels, e.g. 80+80 and 160 sharing the
4321 * same control channel) try to use a smaller bandwidth.
4322 */
4323 ret = ieee80211_vif_use_channel(sdata, &chandef,
4324 IEEE80211_CHANCTX_SHARED);
0418a445
SW		 4325
4326 /* don't downgrade for 5 and 10 MHz channels, though. */
4327 if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4328 chandef.width == NL80211_CHAN_WIDTH_10)
34a3740d 4329 goto out;
0418a445 4330
d601cd8d 4331 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
e6b7cde4 4332 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
d601cd8d
JB		 4333 ret = ieee80211_vif_use_channel(sdata, &chandef,
4334 IEEE80211_CHANCTX_SHARED);
4335 }
34a3740d
JB		 4336 out:
4337 mutex_unlock(&local->mtx);
f2d9d270 4338 return ret;
b17166a7
JB		 4339}
4340
4341static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
c1041f10
CRI		 4342 struct cfg80211_bss *cbss, bool assoc,
4343 bool override)
b17166a7
JB		 4344{
4345 struct ieee80211_local *local = sdata->local;
4346 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4347 struct ieee80211_bss *bss = (void *)cbss->priv;
4348 struct sta_info *new_sta = NULL;
179b8fc7 4349 struct ieee80211_supported_band *sband;
c1041f10 4350 bool have_sta = false;
b17166a7
JB		 4351 int err;
4352
179b8fc7
CRI		 4353 sband = local->hw.wiphy->bands[cbss->channel->band];
4354
b17166a7
JB		 4355 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
4356 return -EINVAL;
4357
f8860ce8
LC		 4358 /* If a reconfig is happening, bail out */
4359 if (local->in_reconfig)
4360 return -EBUSY;
4361
b17166a7
JB		 4362 if (assoc) {
4363 rcu_read_lock();
4364 have_sta = sta_info_get(sdata, cbss->bssid);
4365 rcu_read_unlock();
4366 }
4367
4368 if (!have_sta) {
4369 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4370 if (!new_sta)
4371 return -ENOMEM;
4372 }
179b8fc7 4373
c87905be
JB		 4374 /*
4375 * Set up the information for the new channel before setting the
4376 * new channel. We can't - completely race-free - change the basic
4377 * rates bitmap and the channel (sband) that it refers to, but if
4378 * we set it up before we at least avoid calling into the driver's
4379 * bss_info_changed() method with invalid information (since we do
4380 * call that from changing the channel - only for IDLE and perhaps
4381 * some others, but ...).
4382 *
4383 * So to avoid that, just set up all the new information before the
4384 * channel, but tell the driver to apply it only afterwards, since
4385 * it might need the new channel for that.
4386 */
13e0c8e3 4387 if (new_sta) {
5d6a1b06
JB		 4388 u32 rates = 0, basic_rates = 0;
4389 bool have_higher_than_11mbit;
4390 int min_rate = INT_MAX, min_rate_index = -1;
8cef2c9d 4391 const struct cfg80211_bss_ies *ies;
179b8fc7 4392 int shift = ieee80211_vif_get_shift(&sdata->vif);
5d6a1b06 4393
5d6a1b06
JB		 4394 ieee80211_get_rates(sband, bss->supp_rates,
4395 bss->supp_rates_len,
4396 &rates, &basic_rates,
4397 &have_higher_than_11mbit,
2103dec1 4398 &min_rate, &min_rate_index,
44f6d42c 4399 shift);
5d6a1b06
JB		 4400
4401 /*
4402 * This used to be a workaround for basic rates missing
4403 * in the association response frame. Now that we no
4404 * longer use the basic rates from there, it probably
4405 * doesn't happen any more, but keep the workaround so
4406 * in case some *other* APs are buggy in different ways
4407 * we can connect -- with a warning.
4408 */
4409 if (!basic_rates && min_rate_index >= 0) {
bdcbd8e0
JB		 4410 sdata_info(sdata,
4411 "No basic rates, using min rate instead\n");
5d6a1b06
JB		 4412 basic_rates = BIT(min_rate_index);
4413 }
4414
13e0c8e3 4415 new_sta->sta.supp_rates[cbss->channel->band] = rates;
5d6a1b06
JB		 4416 sdata->vif.bss_conf.basic_rates = basic_rates;
4417
4418 /* cf. IEEE 802.11 9.2.12 */
57fbcce3 4419 if (cbss->channel->band == NL80211_BAND_2GHZ &&
5d6a1b06
JB		 4420 have_higher_than_11mbit)
4421 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
4422 else
4423 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
4424
4425 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
4426
8c358bcd
JB		 4427 /* set timing information */
4428 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
8cef2c9d 4429 rcu_read_lock();
ef429dad
JB		 4430 ies = rcu_dereference(cbss->beacon_ies);
4431 if (ies) {
4432 const u8 *tim_ie;
4433
4434 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4435 sdata->vif.bss_conf.sync_device_ts =
4436 bss->device_ts_beacon;
4437 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4438 ies->data, ies->len);
4439 if (tim_ie && tim_ie[1] >= 2)
4440 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
4441 else
4442 sdata->vif.bss_conf.sync_dtim_count = 0;
30686bf7
JB		 4443 } else if (!ieee80211_hw_check(&sdata->local->hw,
4444 TIMING_BEACON_ONLY)) {
ef429dad
JB		 4445 ies = rcu_dereference(cbss->proberesp_ies);
4446 /* must be non-NULL since beacon IEs were NULL */
4447 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4448 sdata->vif.bss_conf.sync_device_ts =
4449 bss->device_ts_presp;
4450 sdata->vif.bss_conf.sync_dtim_count = 0;
4451 } else {
4452 sdata->vif.bss_conf.sync_tsf = 0;
4453 sdata->vif.bss_conf.sync_device_ts = 0;
4454 sdata->vif.bss_conf.sync_dtim_count = 0;
4455 }
8cef2c9d 4456 rcu_read_unlock();
c87905be 4457 }
8c358bcd 4458
c87905be
JB		 4459 if (new_sta || override) {
4460 err = ieee80211_prep_channel(sdata, cbss);
4461 if (err) {
4462 if (new_sta)
4463 sta_info_free(local, new_sta);
4464 return -EINVAL;
4465 }
4466 }
4467
4468 if (new_sta) {
4469 /*
4470 * tell driver about BSSID, basic rates and timing
4471 * this was set up above, before setting the channel
4472 */
5d6a1b06 4473 ieee80211_bss_info_change_notify(sdata,
8c358bcd
JB		 4474 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4475 BSS_CHANGED_BEACON_INT);
a1cf775d
JB		 4476
4477 if (assoc)
13e0c8e3 4478 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
a1cf775d 4479
13e0c8e3
JB		 4480 err = sta_info_insert(new_sta);
4481 new_sta = NULL;
a1cf775d 4482 if (err) {
bdcbd8e0
JB		 4483 sdata_info(sdata,
4484 "failed to insert STA entry for the AP (error %d)\n",
4485 err);
a1cf775d
JB		 4486 return err;
4487 }
4488 } else
b203ca39 4489 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
a1cf775d 4490
7d830a19
DS		 4491 /* Cancel scan to ensure that nothing interferes with connection */
4492 if (local->scanning)
4493 ieee80211_scan_cancel(local);
4494
a1cf775d
JB		 4495 return 0;
4496}
4497
77fdaa12
JB		 4498/* config hooks */
4499int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4500 struct cfg80211_auth_request *req)
9c6bd790 4501{
66e67e41
JB		 4502 struct ieee80211_local *local = sdata->local;
4503 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4504 struct ieee80211_mgd_auth_data *auth_data;
77fdaa12 4505 u16 auth_alg;
66e67e41
JB		 4506 int err;
4507
4508 /* prepare auth data structure */
9c6bd790 4509
77fdaa12
JB		 4510 switch (req->auth_type) {
4511 case NL80211_AUTHTYPE_OPEN_SYSTEM:
4512 auth_alg = WLAN_AUTH_OPEN;
4513 break;
4514 case NL80211_AUTHTYPE_SHARED_KEY:
66e67e41 4515 if (IS_ERR(local->wep_tx_tfm))
9dca9c49 4516 return -EOPNOTSUPP;
77fdaa12
JB		 4517 auth_alg = WLAN_AUTH_SHARED_KEY;
4518 break;
4519 case NL80211_AUTHTYPE_FT:
4520 auth_alg = WLAN_AUTH_FT;
4521 break;
4522 case NL80211_AUTHTYPE_NETWORK_EAP:
4523 auth_alg = WLAN_AUTH_LEAP;
4524 break;
6b8ece3a
JM		 4525 case NL80211_AUTHTYPE_SAE:
4526 auth_alg = WLAN_AUTH_SAE;
4527 break;
dbc0c2cb
JM		 4528 case NL80211_AUTHTYPE_FILS_SK:
4529 auth_alg = WLAN_AUTH_FILS_SK;
4530 break;
4531 case NL80211_AUTHTYPE_FILS_SK_PFS:
4532 auth_alg = WLAN_AUTH_FILS_SK_PFS;
4533 break;
4534 case NL80211_AUTHTYPE_FILS_PK:
4535 auth_alg = WLAN_AUTH_FILS_PK;
4536 break;
77fdaa12
JB		 4537 default:
4538 return -EOPNOTSUPP;
60f8b39c 4539 }
77fdaa12 4540
11b6b5a4 4541 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len +
6b8ece3a 4542 req->ie_len, GFP_KERNEL);
66e67e41 4543 if (!auth_data)
9c6bd790 4544 return -ENOMEM;
77fdaa12 4545
66e67e41 4546 auth_data->bss = req->bss;
77fdaa12 4547
11b6b5a4 4548 if (req->auth_data_len >= 4) {
6ec63612
JM		 4549 if (req->auth_type == NL80211_AUTHTYPE_SAE) {
4550 __le16 *pos = (__le16 *) req->auth_data;
4551
4552 auth_data->sae_trans = le16_to_cpu(pos[0]);
4553 auth_data->sae_status = le16_to_cpu(pos[1]);
4554 }
11b6b5a4
JM		 4555 memcpy(auth_data->data, req->auth_data + 4,
4556 req->auth_data_len - 4);
4557 auth_data->data_len += req->auth_data_len - 4;
6b8ece3a
JM		 4558 }
4559
77fdaa12 4560 if (req->ie && req->ie_len) {
6b8ece3a
JM		 4561 memcpy(&auth_data->data[auth_data->data_len],
4562 req->ie, req->ie_len);
4563 auth_data->data_len += req->ie_len;
9c6bd790 4564 }
77fdaa12 4565
fffd0934 4566 if (req->key && req->key_len) {
66e67e41
JB		 4567 auth_data->key_len = req->key_len;
4568 auth_data->key_idx = req->key_idx;
4569 memcpy(auth_data->key, req->key, req->key_len);
fffd0934
JB		 4570 }
4571
66e67e41 4572 auth_data->algorithm = auth_alg;
60f8b39c 4573
66e67e41 4574 /* try to authenticate/probe */
2a33bee2 4575
66e67e41
JB		 4576 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4577 ifmgd->assoc_data) {
4578 err = -EBUSY;
4579 goto err_free;
2a33bee2
GE		 4580 }
4581
66e67e41
JB		 4582 if (ifmgd->auth_data)
4583 ieee80211_destroy_auth_data(sdata, false);
2a33bee2 4584
66e67e41
JB		 4585 /* prep auth_data so we don't go into idle on disassoc */
4586 ifmgd->auth_data = auth_data;
af6b6374 4587
7b119dc0
JB		 4588 if (ifmgd->associated) {
4589 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4590
89f774e6
JB		 4591 sdata_info(sdata,
4592 "disconnect from AP %pM for new auth to %pM\n",
4593 ifmgd->associated->bssid, req->bss->bssid);
7b119dc0
JB		 4594 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4595 WLAN_REASON_UNSPECIFIED,
4596 false, frame_buf);
4597
a90faa9d
EG		 4598 ieee80211_report_disconnect(sdata, frame_buf,
4599 sizeof(frame_buf), true,
4600 WLAN_REASON_UNSPECIFIED);
7b119dc0 4601 }
af6b6374 4602
bdcbd8e0 4603 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
e5b900d2 4604
c1041f10 4605 err = ieee80211_prep_connection(sdata, req->bss, false, false);
a1cf775d 4606 if (err)
66e67e41 4607 goto err_clear;
af6b6374 4608
46cad4b7 4609 err = ieee80211_auth(sdata);
66e67e41 4610 if (err) {
66e67e41
JB		 4611 sta_info_destroy_addr(sdata, req->bss->bssid);
4612 goto err_clear;
4613 }
4614
4615 /* hold our own reference */
5b112d3d 4616 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
8d61ffa5 4617 return 0;
66e67e41
JB		 4618
4619 err_clear:
c84a67a2 4620 eth_zero_addr(ifmgd->bssid);
3d2abdfd 4621 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41 4622 ifmgd->auth_data = NULL;
d01f858c
MK		 4623 mutex_lock(&sdata->local->mtx);
4624 ieee80211_vif_release_channel(sdata);
4625 mutex_unlock(&sdata->local->mtx);
66e67e41
JB		 4626 err_free:
4627 kfree(auth_data);
66e67e41 4628 return err;
af6b6374
JB		 4629}
4630
77fdaa12
JB		 4631int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4632 struct cfg80211_assoc_request *req)
f0706e82 4633{
66e67e41 4634 struct ieee80211_local *local = sdata->local;
77fdaa12 4635 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 4636 struct ieee80211_bss *bss = (void *)req->bss->priv;
66e67e41 4637 struct ieee80211_mgd_assoc_data *assoc_data;
c65dd147 4638 const struct cfg80211_bss_ies *beacon_ies;
4e74bfdb 4639 struct ieee80211_supported_band *sband;
b08fbbd8 4640 const u8 *ssidie, *ht_ie, *vht_ie;
2a33bee2 4641 int i, err;
c1041f10 4642 bool override = false;
f0706e82 4643
66e67e41
JB		 4644 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4645 if (!assoc_data)
4646 return -ENOMEM;
4647
9caf0364
JB		 4648 rcu_read_lock();
4649 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4650 if (!ssidie) {
4651 rcu_read_unlock();
4652 kfree(assoc_data);
4653 return -EINVAL;
4654 }
4655 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4656 assoc_data->ssid_len = ssidie[1];
4657 rcu_read_unlock();
4658
7b119dc0
JB		 4659 if (ifmgd->associated) {
4660 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4661
89f774e6
JB		 4662 sdata_info(sdata,
4663 "disconnect from AP %pM for new assoc to %pM\n",
4664 ifmgd->associated->bssid, req->bss->bssid);
7b119dc0
JB		 4665 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4666 WLAN_REASON_UNSPECIFIED,
4667 false, frame_buf);
4668
a90faa9d
EG		 4669 ieee80211_report_disconnect(sdata, frame_buf,
4670 sizeof(frame_buf), true,
4671 WLAN_REASON_UNSPECIFIED);
7b119dc0 4672 }
66e67e41
JB		 4673
4674 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4675 err = -EBUSY;
4676 goto err_free;
af6b6374 4677 }
77fdaa12 4678
66e67e41
JB		 4679 if (ifmgd->assoc_data) {
4680 err = -EBUSY;
4681 goto err_free;
4682 }
77fdaa12 4683
66e67e41
JB		 4684 if (ifmgd->auth_data) {
4685 bool match;
4686
4687 /* keep sta info, bssid if matching */
b203ca39 4688 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
66e67e41 4689 ieee80211_destroy_auth_data(sdata, match);
2a33bee2
GE		 4690 }
4691
66e67e41 4692 /* prepare assoc data */
095d81ce 4693
d8ec4433
JO		 4694 ifmgd->beacon_crc_valid = false;
4695
095d81ce
JB		 4696 assoc_data->wmm = bss->wmm_used &&
4697 (local->hw.queues >= IEEE80211_NUM_ACS);
095d81ce 4698
de5036aa
JB		 4699 /*
4700 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4701 * We still associate in non-HT mode (11a/b/g) if any one of these
4702 * ciphers is configured as pairwise.
4703 * We can set this to true for non-11n hardware, that'll be checked
4704 * separately along with the peer capabilities.
4705 */
1c4cb928 4706 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
77fdaa12
JB		 4707 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4708 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
1c4cb928 4709 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
a8243b72 4710 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
d545daba 4711 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
1c4cb928 4712 netdev_info(sdata->dev,
d545daba 4713 "disabling HT/VHT due to WEP/TKIP use\n");
1c4cb928
JB		 4714 }
4715 }
77fdaa12 4716
4e74bfdb
JB		 4717 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4718 sband = local->hw.wiphy->bands[req->bss->channel->band];
4719 if (!sband->ht_cap.ht_supported ||
095d81ce
JB		 4720 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4721 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
a8243b72 4722 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
095d81ce
JB		 4723 if (!bss->wmm_used &&
4724 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
1b49de26
JB		 4725 netdev_info(sdata->dev,
4726 "disabling HT as WMM/QoS is not supported by the AP\n");
1c4cb928 4727 }
4e74bfdb 4728
d545daba
MP		 4729 /* disable VHT if we don't support it or the AP doesn't use WMM */
4730 if (!sband->vht_cap.vht_supported ||
095d81ce
JB		 4731 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4732 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
d545daba 4733 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
095d81ce
JB		 4734 if (!bss->wmm_used &&
4735 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
1b49de26
JB		 4736 netdev_info(sdata->dev,
4737 "disabling VHT as WMM/QoS is not supported by the AP\n");
d545daba
MP		 4738 }
4739
ef96a842
BG		 4740 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4741 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4742 sizeof(ifmgd->ht_capa_mask));
4743
dd5ecfea
JB		 4744 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4745 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4746 sizeof(ifmgd->vht_capa_mask));
4747
77fdaa12 4748 if (req->ie && req->ie_len) {
66e67e41
JB		 4749 memcpy(assoc_data->ie, req->ie, req->ie_len);
4750 assoc_data->ie_len = req->ie_len;
4751 }
f679f65d 4752
39404fee
JM		 4753 if (req->fils_kek) {
4754 /* should already be checked in cfg80211 - so warn */
4755 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) {
4756 err = -EINVAL;
4757 goto err_free;
4758 }
4759 memcpy(assoc_data->fils_kek, req->fils_kek,
4760 req->fils_kek_len);
4761 assoc_data->fils_kek_len = req->fils_kek_len;
4762 }
4763
4764 if (req->fils_nonces)
4765 memcpy(assoc_data->fils_nonces, req->fils_nonces,
4766 2 * FILS_NONCE_LEN);
4767
66e67e41 4768 assoc_data->bss = req->bss;
f679f65d 4769
af6b6374
JB		 4770 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4771 if (ifmgd->powersave)
04ecd257 4772 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
af6b6374 4773 else
04ecd257 4774 sdata->smps_mode = IEEE80211_SMPS_OFF;
af6b6374 4775 } else
04ecd257 4776 sdata->smps_mode = ifmgd->req_smps;
af6b6374 4777
66e67e41 4778 assoc_data->capability = req->bss->capability;
66e67e41
JB		 4779 assoc_data->supp_rates = bss->supp_rates;
4780 assoc_data->supp_rates_len = bss->supp_rates_len;
9dde6423 4781
9caf0364 4782 rcu_read_lock();
9dde6423
JB		 4783 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4784 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4785 assoc_data->ap_ht_param =
4786 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4787 else
a8243b72 4788 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
b08fbbd8
JB		 4789 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4790 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4791 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4792 sizeof(struct ieee80211_vht_cap));
4793 else
4794 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
9caf0364 4795 rcu_read_unlock();
63f170e0 4796
848955cc 4797 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
30686bf7 4798 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK),
848955cc
JB		 4799 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
4800 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
4801
ab13315a 4802 if (bss->wmm_used && bss->uapsd_supported &&
848955cc 4803 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
76f0303d 4804 assoc_data->uapsd = true;
ab13315a
KV		 4805 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4806 } else {
76f0303d 4807 assoc_data->uapsd = false;
ab13315a
KV		 4808 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4809 }
4810
77fdaa12 4811 if (req->prev_bssid)
66e67e41 4812 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12
JB		 4813
4814 if (req->use_mfp) {
4815 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4816 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4817 } else {
4818 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4819 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4820 }
4821
cd2f5dd7
AK		 4822 if (req->flags & ASSOC_REQ_USE_RRM)
4823 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
4824 else
4825 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
4826
77fdaa12
JB		 4827 if (req->crypto.control_port)
4828 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4829 else
4830 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4831
a621fa4d
JB		 4832 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4833 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
2475b1cc
MS		 4834 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
4835 sdata->vif.type);
a621fa4d 4836
66e67e41
JB		 4837 /* kick off associate process */
4838
4839 ifmgd->assoc_data = assoc_data;
826262c3 4840 ifmgd->dtim_period = 0;
989c6505 4841 ifmgd->have_beacon = false;
66e67e41 4842
c1041f10
CRI		 4843 /* override HT/VHT configuration only if the AP and we support it */
4844 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
4845 struct ieee80211_sta_ht_cap sta_ht_cap;
4846
4847 if (req->flags & ASSOC_REQ_DISABLE_HT)
4848 override = true;
4849
4850 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
4851 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
4852
4853 /* check for 40 MHz disable override */
4854 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) &&
4855 sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
4856 !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
4857 override = true;
4858
4859 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4860 req->flags & ASSOC_REQ_DISABLE_VHT)
4861 override = true;
4862 }
4863
4864 if (req->flags & ASSOC_REQ_DISABLE_HT) {
4865 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4866 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4867 }
4868
4869 if (req->flags & ASSOC_REQ_DISABLE_VHT)
4870 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4871
4872 err = ieee80211_prep_connection(sdata, req->bss, true, override);
a1cf775d
JB		 4873 if (err)
4874 goto err_clear;
66e67e41 4875
c65dd147
EG		 4876 rcu_read_lock();
4877 beacon_ies = rcu_dereference(req->bss->beacon_ies);
826262c3 4878
30686bf7 4879 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) &&
c65dd147
EG		 4880 !beacon_ies) {
4881 /*
4882 * Wait up to one beacon interval ...
4883 * should this be more if we miss one?
4884 */
4885 sdata_info(sdata, "waiting for beacon from %pM\n",
4886 ifmgd->bssid);
4887 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
89afe614 4888 assoc_data->timeout_started = true;
c65dd147
EG		 4889 assoc_data->need_beacon = true;
4890 } else if (beacon_ies) {
4891 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4892 beacon_ies->data,
4893 beacon_ies->len);
ef429dad
JB		 4894 u8 dtim_count = 0;
4895
c65dd147
EG		 4896 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4897 const struct ieee80211_tim_ie *tim;
4898 tim = (void *)(tim_ie + 2);
4899 ifmgd->dtim_period = tim->dtim_period;
ef429dad 4900 dtim_count = tim->dtim_count;
826262c3 4901 }
989c6505 4902 ifmgd->have_beacon = true;
66e67e41 4903 assoc_data->timeout = jiffies;
89afe614 4904 assoc_data->timeout_started = true;
ef429dad 4905
30686bf7 4906 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
ef429dad
JB		 4907 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4908 sdata->vif.bss_conf.sync_device_ts =
4909 bss->device_ts_beacon;
4910 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4911 }
c65dd147
EG		 4912 } else {
4913 assoc_data->timeout = jiffies;
89afe614 4914 assoc_data->timeout_started = true;
66e67e41 4915 }
c65dd147
EG		 4916 rcu_read_unlock();
4917
8d61ffa5 4918 run_again(sdata, assoc_data->timeout);
66e67e41 4919
fcff4f10
PS		 4920 if (bss->corrupt_data) {
4921 char *corrupt_type = "data";
4922 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4923 if (bss->corrupt_data &
4924 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4925 corrupt_type = "beacon and probe response";
4926 else
4927 corrupt_type = "beacon";
4928 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4929 corrupt_type = "probe response";
bdcbd8e0
JB		 4930 sdata_info(sdata, "associating with AP with corrupt %s\n",
4931 corrupt_type);
fcff4f10
PS		 4932 }
4933
8d61ffa5 4934 return 0;
66e67e41 4935 err_clear:
c84a67a2 4936 eth_zero_addr(ifmgd->bssid);
3d2abdfd 4937 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 4938 ifmgd->assoc_data = NULL;
4939 err_free:
4940 kfree(assoc_data);
66e67e41 4941 return err;
f0706e82
JB		 4942}
4943
77fdaa12 4944int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
63c9c5e7 4945 struct cfg80211_deauth_request *req)
f0706e82 4946{
46900298 4947 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 4948 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
6863255b 4949 bool tx = !req->local_state_change;
f0706e82 4950
c9c3a060
JB		 4951 if (ifmgd->auth_data &&
4952 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
4953 sdata_info(sdata,
4954 "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
4955 req->bssid, req->reason_code,
4956 ieee80211_get_reason_code_string(req->reason_code));
0ff71613 4957
8c7d857c 4958 drv_mgd_prepare_tx(sdata->local, sdata);
37ad3888
JB		 4959 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4960 IEEE80211_STYPE_DEAUTH,
6863255b 4961 req->reason_code, tx,
37ad3888 4962 frame_buf);
86552017 4963 ieee80211_destroy_auth_data(sdata, false);
a90faa9d
EG		 4964 ieee80211_report_disconnect(sdata, frame_buf,
4965 sizeof(frame_buf), true,
4966 req->reason_code);
86552017 4967
c9c3a060 4968 return 0;
8c7d857c
EG		 4969 }
4970
a64cba3c
AO		 4971 if (ifmgd->assoc_data &&
4972 ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) {
4973 sdata_info(sdata,
4974 "aborting association with %pM by local choice (Reason: %u=%s)\n",
4975 req->bssid, req->reason_code,
4976 ieee80211_get_reason_code_string(req->reason_code));
4977
4978 drv_mgd_prepare_tx(sdata->local, sdata);
4979 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4980 IEEE80211_STYPE_DEAUTH,
4981 req->reason_code, tx,
4982 frame_buf);
e6f462df 4983 ieee80211_destroy_assoc_data(sdata, false, true);
a64cba3c
AO		 4984 ieee80211_report_disconnect(sdata, frame_buf,
4985 sizeof(frame_buf), true,
4986 req->reason_code);
4987 return 0;
4988 }
4989
86552017
JB		 4990 if (ifmgd->associated &&
4991 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
c9c3a060
JB		 4992 sdata_info(sdata,
4993 "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
4994 req->bssid, req->reason_code,
4995 ieee80211_get_reason_code_string(req->reason_code));
4996
86552017
JB		 4997 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4998 req->reason_code, tx, frame_buf);
a90faa9d
EG		 4999 ieee80211_report_disconnect(sdata, frame_buf,
5000 sizeof(frame_buf), true,
5001 req->reason_code);
c9c3a060
JB		 5002 return 0;
5003 }
86552017 5004
c9c3a060 5005 return -ENOTCONN;
f0706e82 5006}
84363e6e 5007
77fdaa12 5008int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 5009 struct cfg80211_disassoc_request *req)
9c6bd790 5010{
77fdaa12 5011 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 5012 u8 bssid[ETH_ALEN];
6ae16775 5013 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
9c6bd790 5014
8d8b261a
JB		 5015 /*
5016 * cfg80211 should catch this ... but it's racy since
5017 * we can receive a disassoc frame, process it, hand it
5018 * to cfg80211 while that's in a locked section already
5019 * trying to tell us that the user wants to disconnect.
5020 */
8d61ffa5 5021 if (ifmgd->associated != req->bss)
77fdaa12 5022 return -ENOLINK;
77fdaa12 5023
bdcbd8e0 5024 sdata_info(sdata,
dfa1ad29
CO		 5025 "disassociating from %pM by local choice (Reason: %u=%s)\n",
5026 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
0ff71613 5027
e69e95db 5028 memcpy(bssid, req->bss->bssid, ETH_ALEN);
37ad3888
JB		 5029 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
5030 req->reason_code, !req->local_state_change,
5031 frame_buf);
10f644a4 5032
a90faa9d
EG		 5033 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
5034 req->reason_code);
bc83b681 5035
10f644a4
JB		 5036 return 0;
5037}
026331c4 5038
afa762f6 5039void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
54e4ffb2
JB		 5040{
5041 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5042
49921859
BG		 5043 /*
5044 * Make sure some work items will not run after this,
5045 * they will not do anything but might not have been
5046 * cancelled when disconnecting.
5047 */
5048 cancel_work_sync(&ifmgd->monitor_work);
5049 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5050 cancel_work_sync(&ifmgd->request_smps_work);
5051 cancel_work_sync(&ifmgd->csa_connection_drop_work);
5052 cancel_work_sync(&ifmgd->chswitch_work);
81dd2b88 5053 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
49921859 5054
8d61ffa5 5055 sdata_lock(sdata);
959867fa
JB		 5056 if (ifmgd->assoc_data) {
5057 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
e6f462df 5058 ieee80211_destroy_assoc_data(sdata, false, false);
959867fa
JB		 5059 cfg80211_assoc_timeout(sdata->dev, bss);
5060 }
54e4ffb2
JB		 5061 if (ifmgd->auth_data)
5062 ieee80211_destroy_auth_data(sdata, false);
1277b4a9
LK		 5063 spin_lock_bh(&ifmgd->teardown_lock);
5064 if (ifmgd->teardown_skb) {
5065 kfree_skb(ifmgd->teardown_skb);
5066 ifmgd->teardown_skb = NULL;
5067 ifmgd->orig_teardown_skb = NULL;
5068 }
5069 spin_unlock_bh(&ifmgd->teardown_lock);
54e4ffb2 5070 del_timer_sync(&ifmgd->timer);
8d61ffa5 5071 sdata_unlock(sdata);
54e4ffb2
JB		 5072}
5073
a97c13c3
JO		 5074void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
5075 enum nl80211_cqm_rssi_threshold_event rssi_event,
769f07d8 5076 s32 rssi_level,
a97c13c3
JO		 5077 gfp_t gfp)
5078{
5079 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5080
769f07d8 5081 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level);
b5878a2d 5082
bee427b8 5083 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp);
a97c13c3
JO		 5084}
5085EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
98f03342
JB		 5086
5087void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
5088{
5089 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5090
5091 trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
5092
5093 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
5094}
5095EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);
Linux 6.x block layer and io_uring tree(s)