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Merge tag 'for-4.1' of git://git.kernel.org/pub/scm/linux/kernel/git/kishon/linux...
[deliverable/linux.git] / net / mac80211 / mlme.c
CommitLineData
f0706e82
JB		 1/*
2 * BSS client mode implementation
5394af4d 3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
f0706e82
JB		 4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
d98ad83e 8 * Copyright 2013-2014 Intel Mobile Communications GmbH
f0706e82
JB		 9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
13 */
14
5b323edb 15#include <linux/delay.h>
f0706e82
JB		 16#include <linux/if_ether.h>
17#include <linux/skbuff.h>
f0706e82 18#include <linux/if_arp.h>
f0706e82 19#include <linux/etherdevice.h>
d9b93842 20#include <linux/moduleparam.h>
d0709a65 21#include <linux/rtnetlink.h>
e8db0be1 22#include <linux/pm_qos.h>
d91f36db 23#include <linux/crc32.h>
5a0e3ad6 24#include <linux/slab.h>
bc3b2d7f 25#include <linux/export.h>
f0706e82 26#include <net/mac80211.h>
472dbc45 27#include <asm/unaligned.h>
60f8b39c 28
f0706e82 29#include "ieee80211_i.h"
24487981 30#include "driver-ops.h"
2c8dccc7
JB		 31#include "rate.h"
32#include "led.h"
f0706e82 33
1672c0e3 34#define IEEE80211_AUTH_TIMEOUT (HZ / 5)
cb236d2d 35#define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2)
1672c0e3
JB		 36#define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10)
37#define IEEE80211_AUTH_MAX_TRIES 3
38#define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
39#define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
cb236d2d 40#define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2)
1672c0e3
JB		 41#define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10)
42#define IEEE80211_ASSOC_MAX_TRIES 3
66e67e41 43
180205bd
BG		 44static int max_nullfunc_tries = 2;
45module_param(max_nullfunc_tries, int, 0644);
46MODULE_PARM_DESC(max_nullfunc_tries,
47 "Maximum nullfunc tx tries before disconnecting (reason 4).");
48
49static int max_probe_tries = 5;
50module_param(max_probe_tries, int, 0644);
51MODULE_PARM_DESC(max_probe_tries,
52 "Maximum probe tries before disconnecting (reason 4).");
b291ba11
JB		 53
54/*
7ccc8bd7
FF		 55 * Beacon loss timeout is calculated as N frames times the
56 * advertised beacon interval. This may need to be somewhat
57 * higher than what hardware might detect to account for
58 * delays in the host processing frames. But since we also
59 * probe on beacon miss before declaring the connection lost
60 * default to what we want.
b291ba11 61 */
59c1ec2b
BG		 62static int beacon_loss_count = 7;
63module_param(beacon_loss_count, int, 0644);
64MODULE_PARM_DESC(beacon_loss_count,
65 "Number of beacon intervals before we decide beacon was lost.");
7ccc8bd7 66
b291ba11
JB		 67/*
68 * Time the connection can be idle before we probe
69 * it to see if we can still talk to the AP.
70 */
d1c5091f 71#define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
b291ba11
JB		 72/*
73 * Time we wait for a probe response after sending
74 * a probe request because of beacon loss or for
75 * checking the connection still works.
76 */
180205bd
BG		 77static int probe_wait_ms = 500;
78module_param(probe_wait_ms, int, 0644);
79MODULE_PARM_DESC(probe_wait_ms,
80 "Maximum time(ms) to wait for probe response"
81 " before disconnecting (reason 4).");
f0706e82 82
17e4ec14
JM		 83/*
84 * Weight given to the latest Beacon frame when calculating average signal
85 * strength for Beacon frames received in the current BSS. This must be
86 * between 1 and 15.
87 */
88#define IEEE80211_SIGNAL_AVE_WEIGHT 3
89
391a200a
JM		 90/*
91 * How many Beacon frames need to have been used in average signal strength
92 * before starting to indicate signal change events.
93 */
94#define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
95
ca386f31
JB		 96/*
97 * We can have multiple work items (and connection probing)
98 * scheduling this timer, but we need to take care to only
99 * reschedule it when it should fire _earlier_ than it was
100 * asked for before, or if it's not pending right now. This
101 * function ensures that. Note that it then is required to
102 * run this function for all timeouts after the first one
103 * has happened -- the work that runs from this timer will
104 * do that.
105 */
8d61ffa5
JB		 106static void run_again(struct ieee80211_sub_if_data *sdata,
107 unsigned long timeout)
ca386f31 108{
8d61ffa5 109 sdata_assert_lock(sdata);
ca386f31 110
8d61ffa5
JB		 111 if (!timer_pending(&sdata->u.mgd.timer) ||
112 time_before(timeout, sdata->u.mgd.timer.expires))
113 mod_timer(&sdata->u.mgd.timer, timeout);
ca386f31
JB		 114}
115
d3a910a8 116void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
b291ba11 117{
c1288b12 118 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
b291ba11
JB		 119 return;
120
7eeff74c
JB		 121 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
122 return;
123
b291ba11 124 mod_timer(&sdata->u.mgd.bcn_mon_timer,
7ccc8bd7 125 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
b291ba11
JB		 126}
127
be099e82
LR		 128void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
129{
0c699c3a
LR		 130 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
131
8628172f
SG		 132 if (unlikely(!sdata->u.mgd.associated))
133 return;
134
448cd2e2
EP		 135 ifmgd->probe_send_count = 0;
136
be099e82
LR		 137 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
138 return;
139
140 mod_timer(&sdata->u.mgd.conn_mon_timer,
141 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
142}
143
5484e237 144static int ecw2cw(int ecw)
60f8b39c 145{
5484e237 146 return (1 << ecw) - 1;
60f8b39c
JB		 147}
148
6565ec9b
JB		 149static u32
150ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
151 struct ieee80211_supported_band *sband,
152 struct ieee80211_channel *channel,
53b954ee 153 const struct ieee80211_ht_cap *ht_cap,
6565ec9b
JB		 154 const struct ieee80211_ht_operation *ht_oper,
155 const struct ieee80211_vht_operation *vht_oper,
5cdaed1e 156 struct cfg80211_chan_def *chandef, bool tracking)
6565ec9b 157{
5cdaed1e 158 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6565ec9b 159 struct cfg80211_chan_def vht_chandef;
179b8fc7 160 struct ieee80211_sta_ht_cap sta_ht_cap;
6565ec9b
JB		 161 u32 ht_cfreq, ret;
162
179b8fc7
CRI		 163 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
164 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
165
6565ec9b
JB		 166 chandef->chan = channel;
167 chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
168 chandef->center_freq1 = channel->center_freq;
169 chandef->center_freq2 = 0;
170
179b8fc7 171 if (!ht_cap || !ht_oper || !sta_ht_cap.ht_supported) {
6565ec9b
JB		 172 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
173 goto out;
174 }
175
176 chandef->width = NL80211_CHAN_WIDTH_20;
177
53b954ee
EP		 178 if (!(ht_cap->cap_info &
179 cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40))) {
f3000e1b 180 ret = IEEE80211_STA_DISABLE_40MHZ;
7e6225a1 181 vht_chandef = *chandef;
53b954ee
EP		 182 goto out;
183 }
184
6565ec9b
JB		 185 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
186 channel->band);
187 /* check that channel matches the right operating channel */
5cdaed1e 188 if (!tracking && channel->center_freq != ht_cfreq) {
6565ec9b
JB		 189 /*
190 * It's possible that some APs are confused here;
191 * Netgear WNDR3700 sometimes reports 4 higher than
192 * the actual channel in association responses, but
193 * since we look at probe response/beacon data here
194 * it should be OK.
195 */
5cdaed1e
JB		 196 sdata_info(sdata,
197 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
198 channel->center_freq, ht_cfreq,
199 ht_oper->primary_chan, channel->band);
6565ec9b
JB		 200 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
201 goto out;
202 }
203
204 /* check 40 MHz support, if we have it */
179b8fc7 205 if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
6565ec9b
JB		 206 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
207 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
208 chandef->width = NL80211_CHAN_WIDTH_40;
209 chandef->center_freq1 += 10;
210 break;
211 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
212 chandef->width = NL80211_CHAN_WIDTH_40;
213 chandef->center_freq1 -= 10;
214 break;
215 }
216 } else {
217 /* 40 MHz (and 80 MHz) must be supported for VHT */
218 ret = IEEE80211_STA_DISABLE_VHT;
85220d71
JB		 219 /* also mark 40 MHz disabled */
220 ret |= IEEE80211_STA_DISABLE_40MHZ;
6565ec9b
JB		 221 goto out;
222 }
223
224 if (!vht_oper || !sband->vht_cap.vht_supported) {
225 ret = IEEE80211_STA_DISABLE_VHT;
226 goto out;
227 }
228
229 vht_chandef.chan = channel;
230 vht_chandef.center_freq1 =
231 ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx,
232 channel->band);
233 vht_chandef.center_freq2 = 0;
234
6565ec9b
JB		 235 switch (vht_oper->chan_width) {
236 case IEEE80211_VHT_CHANWIDTH_USE_HT:
237 vht_chandef.width = chandef->width;
cb664981 238 vht_chandef.center_freq1 = chandef->center_freq1;
6565ec9b
JB		 239 break;
240 case IEEE80211_VHT_CHANWIDTH_80MHZ:
241 vht_chandef.width = NL80211_CHAN_WIDTH_80;
242 break;
243 case IEEE80211_VHT_CHANWIDTH_160MHZ:
244 vht_chandef.width = NL80211_CHAN_WIDTH_160;
245 break;
246 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
247 vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
6553bf04
JB		 248 vht_chandef.center_freq2 =
249 ieee80211_channel_to_frequency(
250 vht_oper->center_freq_seg2_idx,
251 channel->band);
6565ec9b
JB		 252 break;
253 default:
5cdaed1e 254 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
30eb1dc2
JB		 255 sdata_info(sdata,
256 "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
257 vht_oper->chan_width);
6565ec9b
JB		 258 ret = IEEE80211_STA_DISABLE_VHT;
259 goto out;
260 }
261
262 if (!cfg80211_chandef_valid(&vht_chandef)) {
5cdaed1e 263 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
30eb1dc2
JB		 264 sdata_info(sdata,
265 "AP VHT information is invalid, disable VHT\n");
6565ec9b
JB		 266 ret = IEEE80211_STA_DISABLE_VHT;
267 goto out;
268 }
269
270 if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
271 ret = 0;
272 goto out;
273 }
274
275 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
5cdaed1e 276 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
30eb1dc2
JB		 277 sdata_info(sdata,
278 "AP VHT information doesn't match HT, disable VHT\n");
6565ec9b
JB		 279 ret = IEEE80211_STA_DISABLE_VHT;
280 goto out;
281 }
282
283 *chandef = vht_chandef;
284
285 ret = 0;
286
287out:
963a1852
JB		 288 /*
289 * When tracking the current AP, don't do any further checks if the
290 * new chandef is identical to the one we're currently using for the
291 * connection. This keeps us from playing ping-pong with regulatory,
292 * without it the following can happen (for example):
293 * - connect to an AP with 80 MHz, world regdom allows 80 MHz
294 * - AP advertises regdom US
295 * - CRDA loads regdom US with 80 MHz prohibited (old database)
296 * - the code below detects an unsupported channel, downgrades, and
297 * we disconnect from the AP in the caller
298 * - disconnect causes CRDA to reload world regdomain and the game
299 * starts anew.
300 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
301 *
302 * It seems possible that there are still scenarios with CSA or real
303 * bandwidth changes where a this could happen, but those cases are
304 * less common and wouldn't completely prevent using the AP.
305 */
306 if (tracking &&
307 cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef))
308 return ret;
309
586e01ed
JB		 310 /* don't print the message below for VHT mismatch if VHT is disabled */
311 if (ret & IEEE80211_STA_DISABLE_VHT)
312 vht_chandef = *chandef;
313
ddfe49b4
JB		 314 /*
315 * Ignore the DISABLED flag when we're already connected and only
316 * tracking the APs beacon for bandwidth changes - otherwise we
317 * might get disconnected here if we connect to an AP, update our
318 * regulatory information based on the AP's country IE and the
319 * information we have is wrong/outdated and disables the channel
320 * that we're actually using for the connection to the AP.
321 */
6565ec9b 322 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
ddfe49b4
JB		 323 tracking ? 0 :
324 IEEE80211_CHAN_DISABLED)) {
6565ec9b
JB		 325 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
326 ret = IEEE80211_STA_DISABLE_HT |
327 IEEE80211_STA_DISABLE_VHT;
b56e4b85 328 break;
6565ec9b
JB		 329 }
330
e6b7cde4 331 ret |= ieee80211_chandef_downgrade(chandef);
6565ec9b
JB		 332 }
333
5cdaed1e 334 if (chandef->width != vht_chandef.width && !tracking)
6565ec9b
JB		 335 sdata_info(sdata,
336 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
337
338 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
339 return ret;
340}
341
30eb1dc2
JB		 342static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
343 struct sta_info *sta,
53b954ee 344 const struct ieee80211_ht_cap *ht_cap,
30eb1dc2
JB		 345 const struct ieee80211_ht_operation *ht_oper,
346 const struct ieee80211_vht_operation *vht_oper,
347 const u8 *bssid, u32 *changed)
d5522e03
JB		 348{
349 struct ieee80211_local *local = sdata->local;
30eb1dc2 350 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d5522e03 351 struct ieee80211_supported_band *sband;
55de908a 352 struct ieee80211_channel *chan;
30eb1dc2 353 struct cfg80211_chan_def chandef;
9ed6bcce 354 u16 ht_opmode;
30eb1dc2
JB		 355 u32 flags;
356 enum ieee80211_sta_rx_bandwidth new_sta_bw;
357 int ret;
d5522e03 358
30eb1dc2
JB		 359 /* if HT was/is disabled, don't track any bandwidth changes */
360 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
1128958d
JB		 361 return 0;
362
30eb1dc2
JB		 363 /* don't check VHT if we associated as non-VHT station */
364 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
365 vht_oper = NULL;
366
367 if (WARN_ON_ONCE(!sta))
368 return -EINVAL;
369
017b45bb
AA		 370 /*
371 * if bss configuration changed store the new one -
372 * this may be applicable even if channel is identical
373 */
374 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
375 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
376 *changed |= BSS_CHANGED_HT;
377 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
378 }
379
f2d9330e 380 chan = sdata->vif.bss_conf.chandef.chan;
55de908a 381 sband = local->hw.wiphy->bands[chan->band];
d5522e03 382
30eb1dc2 383 /* calculate new channel (type) based on HT/VHT operation IEs */
53b954ee
EP		 384 flags = ieee80211_determine_chantype(sdata, sband, chan,
385 ht_cap, ht_oper, vht_oper,
386 &chandef, true);
30eb1dc2
JB		 387
388 /*
389 * Downgrade the new channel if we associated with restricted
390 * capabilities. For example, if we associated as a 20 MHz STA
391 * to a 40 MHz AP (due to regulatory, capabilities or config
392 * reasons) then switching to a 40 MHz channel now won't do us
393 * any good -- we couldn't use it with the AP.
394 */
395 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
396 chandef.width == NL80211_CHAN_WIDTH_80P80)
e6b7cde4 397 flags |= ieee80211_chandef_downgrade(&chandef);
30eb1dc2
JB		 398 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
399 chandef.width == NL80211_CHAN_WIDTH_160)
e6b7cde4 400 flags |= ieee80211_chandef_downgrade(&chandef);
30eb1dc2
JB		 401 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
402 chandef.width > NL80211_CHAN_WIDTH_20)
e6b7cde4 403 flags |= ieee80211_chandef_downgrade(&chandef);
30eb1dc2
JB		 404
405 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
406 return 0;
407
408 sdata_info(sdata,
409 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
410 ifmgd->bssid, chandef.chan->center_freq, chandef.width,
411 chandef.center_freq1, chandef.center_freq2);
412
413 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
414 IEEE80211_STA_DISABLE_VHT |
415 IEEE80211_STA_DISABLE_40MHZ |
416 IEEE80211_STA_DISABLE_80P80MHZ |
417 IEEE80211_STA_DISABLE_160MHZ)) ||
418 !cfg80211_chandef_valid(&chandef)) {
419 sdata_info(sdata,
420 "AP %pM changed bandwidth in a way we can't support - disconnect\n",
421 ifmgd->bssid);
422 return -EINVAL;
423 }
424
425 switch (chandef.width) {
426 case NL80211_CHAN_WIDTH_20_NOHT:
427 case NL80211_CHAN_WIDTH_20:
428 new_sta_bw = IEEE80211_STA_RX_BW_20;
429 break;
4bf88530 430 case NL80211_CHAN_WIDTH_40:
30eb1dc2 431 new_sta_bw = IEEE80211_STA_RX_BW_40;
64f68e5d 432 break;
30eb1dc2
JB		 433 case NL80211_CHAN_WIDTH_80:
434 new_sta_bw = IEEE80211_STA_RX_BW_80;
435 break;
436 case NL80211_CHAN_WIDTH_80P80:
437 case NL80211_CHAN_WIDTH_160:
438 new_sta_bw = IEEE80211_STA_RX_BW_160;
64f68e5d 439 break;
30eb1dc2
JB		 440 default:
441 return -EINVAL;
64f68e5d 442 }
d5522e03 443
30eb1dc2
JB		 444 if (new_sta_bw > sta->cur_max_bandwidth)
445 new_sta_bw = sta->cur_max_bandwidth;
64f68e5d 446
30eb1dc2
JB		 447 if (new_sta_bw < sta->sta.bandwidth) {
448 sta->sta.bandwidth = new_sta_bw;
449 rate_control_rate_update(local, sband, sta,
450 IEEE80211_RC_BW_CHANGED);
451 }
64f68e5d 452
30eb1dc2
JB		 453 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
454 if (ret) {
455 sdata_info(sdata,
456 "AP %pM changed bandwidth to incompatible one - disconnect\n",
457 ifmgd->bssid);
458 return ret;
459 }
7cc44ed4 460
30eb1dc2
JB		 461 if (new_sta_bw > sta->sta.bandwidth) {
462 sta->sta.bandwidth = new_sta_bw;
463 rate_control_rate_update(local, sband, sta,
464 IEEE80211_RC_BW_CHANGED);
0aaffa9b 465 }
d5522e03 466
30eb1dc2 467 return 0;
d5522e03
JB		 468}
469
9c6bd790
JB		 470/* frame sending functions */
471
66e67e41 472static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
9dde6423 473 struct sk_buff *skb, u8 ap_ht_param,
66e67e41
JB		 474 struct ieee80211_supported_band *sband,
475 struct ieee80211_channel *channel,
476 enum ieee80211_smps_mode smps)
477{
66e67e41
JB		 478 u8 *pos;
479 u32 flags = channel->flags;
480 u16 cap;
481 struct ieee80211_sta_ht_cap ht_cap;
482
483 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
484
66e67e41
JB		 485 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
486 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
487
66e67e41
JB		 488 /* determine capability flags */
489 cap = ht_cap.cap;
490
9dde6423 491 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
66e67e41
JB		 492 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
493 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
494 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
495 cap &= ~IEEE80211_HT_CAP_SGI_40;
496 }
497 break;
498 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
499 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
500 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
501 cap &= ~IEEE80211_HT_CAP_SGI_40;
502 }
503 break;
504 }
505
24398e39
JB		 506 /*
507 * If 40 MHz was disabled associate as though we weren't
508 * capable of 40 MHz -- some broken APs will never fall
509 * back to trying to transmit in 20 MHz.
510 */
511 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
512 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
513 cap &= ~IEEE80211_HT_CAP_SGI_40;
514 }
515
66e67e41
JB		 516 /* set SM PS mode properly */
517 cap &= ~IEEE80211_HT_CAP_SM_PS;
518 switch (smps) {
519 case IEEE80211_SMPS_AUTOMATIC:
520 case IEEE80211_SMPS_NUM_MODES:
521 WARN_ON(1);
522 case IEEE80211_SMPS_OFF:
523 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
524 IEEE80211_HT_CAP_SM_PS_SHIFT;
525 break;
526 case IEEE80211_SMPS_STATIC:
527 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
528 IEEE80211_HT_CAP_SM_PS_SHIFT;
529 break;
530 case IEEE80211_SMPS_DYNAMIC:
531 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
532 IEEE80211_HT_CAP_SM_PS_SHIFT;
533 break;
534 }
535
536 /* reserve and fill IE */
537 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
538 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
539}
540
d545daba
MP		 541static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
542 struct sk_buff *skb,
b08fbbd8
JB		 543 struct ieee80211_supported_band *sband,
544 struct ieee80211_vht_cap *ap_vht_cap)
d545daba
MP		 545{
546 u8 *pos;
547 u32 cap;
548 struct ieee80211_sta_vht_cap vht_cap;
c1cf6d4e 549 u32 mask, ap_bf_sts, our_bf_sts;
d545daba
MP		 550
551 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
552
553 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
dd5ecfea 554 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
d545daba
MP		 555
556 /* determine capability flags */
557 cap = vht_cap.cap;
558
f2d9d270 559 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
575f0530
JB		 560 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
561
562 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
563 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ ||
564 bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
565 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
f2d9d270
JB		 566 }
567
568 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
569 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
575f0530 570 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
f2d9d270
JB		 571 }
572
b08fbbd8
JB		 573 /*
574 * Some APs apparently get confused if our capabilities are better
575 * than theirs, so restrict what we advertise in the assoc request.
576 */
577 if (!(ap_vht_cap->vht_cap_info &
578 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
579 cap &= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE;
580
c1cf6d4e
ES		 581 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK;
582
583 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask;
584 our_bf_sts = cap & mask;
585
586 if (ap_bf_sts < our_bf_sts) {
587 cap &= ~mask;
588 cap |= ap_bf_sts;
589 }
590
d545daba 591 /* reserve and fill IE */
d4950281 592 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
d545daba
MP		 593 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
594}
595
66e67e41
JB		 596static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
597{
598 struct ieee80211_local *local = sdata->local;
599 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
600 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
601 struct sk_buff *skb;
602 struct ieee80211_mgmt *mgmt;
603 u8 *pos, qos_info;
604 size_t offset = 0, noffset;
2103dec1 605 int i, count, rates_len, supp_rates_len, shift;
66e67e41
JB		 606 u16 capab;
607 struct ieee80211_supported_band *sband;
55de908a
JB		 608 struct ieee80211_chanctx_conf *chanctx_conf;
609 struct ieee80211_channel *chan;
2103dec1 610 u32 rate_flags, rates = 0;
66e67e41 611
8d61ffa5 612 sdata_assert_lock(sdata);
66e67e41 613
55de908a
JB		 614 rcu_read_lock();
615 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
616 if (WARN_ON(!chanctx_conf)) {
617 rcu_read_unlock();
618 return;
619 }
4bf88530 620 chan = chanctx_conf->def.chan;
2103dec1 621 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
55de908a
JB		 622 rcu_read_unlock();
623 sband = local->hw.wiphy->bands[chan->band];
2103dec1 624 shift = ieee80211_vif_get_shift(&sdata->vif);
66e67e41
JB		 625
626 if (assoc_data->supp_rates_len) {
627 /*
628 * Get all rates supported by the device and the AP as
629 * some APs don't like getting a superset of their rates
630 * in the association request (e.g. D-Link DAP 1353 in
631 * b-only mode)...
632 */
2103dec1
SW		 633 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
634 assoc_data->supp_rates,
635 assoc_data->supp_rates_len,
636 &rates);
66e67e41
JB		 637 } else {
638 /*
639 * In case AP not provide any supported rates information
640 * before association, we send information element(s) with
641 * all rates that we support.
642 */
2103dec1
SW		 643 rates_len = 0;
644 for (i = 0; i < sband->n_bitrates; i++) {
645 if ((rate_flags & sband->bitrates[i].flags)
646 != rate_flags)
647 continue;
648 rates |= BIT(i);
649 rates_len++;
650 }
66e67e41
JB		 651 }
652
653 skb = alloc_skb(local->hw.extra_tx_headroom +
654 sizeof(*mgmt) + /* bit too much but doesn't matter */
655 2 + assoc_data->ssid_len + /* SSID */
656 4 + rates_len + /* (extended) rates */
657 4 + /* power capability */
658 2 + 2 * sband->n_channels + /* supported channels */
659 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
d4950281 660 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
66e67e41
JB		 661 assoc_data->ie_len + /* extra IEs */
662 9, /* WMM */
663 GFP_KERNEL);
664 if (!skb)
665 return;
666
667 skb_reserve(skb, local->hw.extra_tx_headroom);
668
669 capab = WLAN_CAPABILITY_ESS;
670
671 if (sband->band == IEEE80211_BAND_2GHZ) {
672 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
673 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
674 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
675 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
676 }
677
678 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
679 capab |= WLAN_CAPABILITY_PRIVACY;
680
681 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
682 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
683 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
684
cd2f5dd7
AK		 685 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM)
686 capab |= WLAN_CAPABILITY_RADIO_MEASURE;
687
66e67e41
JB		 688 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
689 memset(mgmt, 0, 24);
690 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
691 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
692 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
693
694 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
695 skb_put(skb, 10);
696 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
697 IEEE80211_STYPE_REASSOC_REQ);
698 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
699 mgmt->u.reassoc_req.listen_interval =
700 cpu_to_le16(local->hw.conf.listen_interval);
701 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
702 ETH_ALEN);
703 } else {
704 skb_put(skb, 4);
705 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
706 IEEE80211_STYPE_ASSOC_REQ);
707 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
708 mgmt->u.assoc_req.listen_interval =
709 cpu_to_le16(local->hw.conf.listen_interval);
710 }
711
712 /* SSID */
713 pos = skb_put(skb, 2 + assoc_data->ssid_len);
714 *pos++ = WLAN_EID_SSID;
715 *pos++ = assoc_data->ssid_len;
716 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
717
718 /* add all rates which were marked to be used above */
719 supp_rates_len = rates_len;
720 if (supp_rates_len > 8)
721 supp_rates_len = 8;
722
723 pos = skb_put(skb, supp_rates_len + 2);
724 *pos++ = WLAN_EID_SUPP_RATES;
725 *pos++ = supp_rates_len;
726
727 count = 0;
728 for (i = 0; i < sband->n_bitrates; i++) {
729 if (BIT(i) & rates) {
2103dec1
SW		 730 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
731 5 * (1 << shift));
732 *pos++ = (u8) rate;
66e67e41
JB		 733 if (++count == 8)
734 break;
735 }
736 }
737
738 if (rates_len > count) {
739 pos = skb_put(skb, rates_len - count + 2);
740 *pos++ = WLAN_EID_EXT_SUPP_RATES;
741 *pos++ = rates_len - count;
742
743 for (i++; i < sband->n_bitrates; i++) {
744 if (BIT(i) & rates) {
2103dec1
SW		 745 int rate;
746 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
747 5 * (1 << shift));
748 *pos++ = (u8) rate;
66e67e41
JB		 749 }
750 }
751 }
752
cd2f5dd7
AK		 753 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT ||
754 capab & WLAN_CAPABILITY_RADIO_MEASURE) {
66e67e41
JB		 755 pos = skb_put(skb, 4);
756 *pos++ = WLAN_EID_PWR_CAPABILITY;
757 *pos++ = 2;
758 *pos++ = 0; /* min tx power */
0430c883
SW		 759 /* max tx power */
760 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
cd2f5dd7 761 }
66e67e41 762
cd2f5dd7 763 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
66e67e41
JB		 764 /* TODO: get this in reg domain format */
765 pos = skb_put(skb, 2 * sband->n_channels + 2);
766 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
767 *pos++ = 2 * sband->n_channels;
768 for (i = 0; i < sband->n_channels; i++) {
769 *pos++ = ieee80211_frequency_to_channel(
770 sband->channels[i].center_freq);
771 *pos++ = 1; /* one channel in the subband*/
772 }
773 }
774
775 /* if present, add any custom IEs that go before HT */
b3f51e94 776 if (assoc_data->ie_len) {
66e67e41
JB		 777 static const u8 before_ht[] = {
778 WLAN_EID_SSID,
779 WLAN_EID_SUPP_RATES,
780 WLAN_EID_EXT_SUPP_RATES,
781 WLAN_EID_PWR_CAPABILITY,
782 WLAN_EID_SUPPORTED_CHANNELS,
783 WLAN_EID_RSN,
784 WLAN_EID_QOS_CAPA,
785 WLAN_EID_RRM_ENABLED_CAPABILITIES,
786 WLAN_EID_MOBILITY_DOMAIN,
8ed28747
JB		 787 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */
788 WLAN_EID_RIC_DATA, /* reassoc only */
66e67e41
JB		 789 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
790 };
8ed28747
JB		 791 static const u8 after_ric[] = {
792 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
793 WLAN_EID_HT_CAPABILITY,
794 WLAN_EID_BSS_COEX_2040,
795 WLAN_EID_EXT_CAPABILITY,
796 WLAN_EID_QOS_TRAFFIC_CAPA,
797 WLAN_EID_TIM_BCAST_REQ,
798 WLAN_EID_INTERWORKING,
799 /* 60GHz doesn't happen right now */
800 WLAN_EID_VHT_CAPABILITY,
801 WLAN_EID_OPMODE_NOTIF,
802 };
803
804 noffset = ieee80211_ie_split_ric(assoc_data->ie,
805 assoc_data->ie_len,
806 before_ht,
807 ARRAY_SIZE(before_ht),
808 after_ric,
809 ARRAY_SIZE(after_ric),
810 offset);
66e67e41
JB		 811 pos = skb_put(skb, noffset - offset);
812 memcpy(pos, assoc_data->ie + offset, noffset - offset);
813 offset = noffset;
814 }
815
f2d9d270
JB		 816 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
817 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
818 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
819
a8243b72 820 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
9dde6423 821 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
04ecd257 822 sband, chan, sdata->smps_mode);
66e67e41 823
3de3802c
JB		 824 /* if present, add any custom IEs that go before VHT */
825 if (assoc_data->ie_len) {
826 static const u8 before_vht[] = {
827 WLAN_EID_SSID,
828 WLAN_EID_SUPP_RATES,
829 WLAN_EID_EXT_SUPP_RATES,
830 WLAN_EID_PWR_CAPABILITY,
831 WLAN_EID_SUPPORTED_CHANNELS,
832 WLAN_EID_RSN,
833 WLAN_EID_QOS_CAPA,
834 WLAN_EID_RRM_ENABLED_CAPABILITIES,
835 WLAN_EID_MOBILITY_DOMAIN,
836 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
837 WLAN_EID_HT_CAPABILITY,
838 WLAN_EID_BSS_COEX_2040,
839 WLAN_EID_EXT_CAPABILITY,
840 WLAN_EID_QOS_TRAFFIC_CAPA,
841 WLAN_EID_TIM_BCAST_REQ,
842 WLAN_EID_INTERWORKING,
843 };
8ed28747
JB		 844
845 /* RIC already taken above, so no need to handle here anymore */
3de3802c
JB		 846 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
847 before_vht, ARRAY_SIZE(before_vht),
848 offset);
849 pos = skb_put(skb, noffset - offset);
850 memcpy(pos, assoc_data->ie + offset, noffset - offset);
851 offset = noffset;
852 }
853
d545daba 854 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
b08fbbd8
JB		 855 ieee80211_add_vht_ie(sdata, skb, sband,
856 &assoc_data->ap_vht_cap);
d545daba 857
66e67e41 858 /* if present, add any custom non-vendor IEs that go after HT */
b3f51e94 859 if (assoc_data->ie_len) {
66e67e41
JB		 860 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
861 assoc_data->ie_len,
862 offset);
863 pos = skb_put(skb, noffset - offset);
864 memcpy(pos, assoc_data->ie + offset, noffset - offset);
865 offset = noffset;
866 }
867
76f0303d
JB		 868 if (assoc_data->wmm) {
869 if (assoc_data->uapsd) {
dc41e4d4
EP		 870 qos_info = ifmgd->uapsd_queues;
871 qos_info |= (ifmgd->uapsd_max_sp_len <<
66e67e41
JB		 872 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
873 } else {
874 qos_info = 0;
875 }
876
40b861a0 877 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
66e67e41
JB		 878 }
879
880 /* add any remaining custom (i.e. vendor specific here) IEs */
b3f51e94 881 if (assoc_data->ie_len) {
66e67e41
JB		 882 noffset = assoc_data->ie_len;
883 pos = skb_put(skb, noffset - offset);
884 memcpy(pos, assoc_data->ie + offset, noffset - offset);
885 }
886
a1845fc7
JB		 887 drv_mgd_prepare_tx(local, sdata);
888
66e67e41 889 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1672c0e3
JB		 890 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
891 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
892 IEEE80211_TX_INTFL_MLME_CONN_TX;
66e67e41
JB		 893 ieee80211_tx_skb(sdata, skb);
894}
895
572e0012
KV		 896void ieee80211_send_pspoll(struct ieee80211_local *local,
897 struct ieee80211_sub_if_data *sdata)
898{
572e0012
KV		 899 struct ieee80211_pspoll *pspoll;
900 struct sk_buff *skb;
572e0012 901
d8cd189e
KV		 902 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
903 if (!skb)
572e0012 904 return;
572e0012 905
d8cd189e
KV		 906 pspoll = (struct ieee80211_pspoll *) skb->data;
907 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
572e0012 908
62ae67be
JB		 909 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
910 ieee80211_tx_skb(sdata, skb);
572e0012
KV		 911}
912
965bedad
JB		 913void ieee80211_send_nullfunc(struct ieee80211_local *local,
914 struct ieee80211_sub_if_data *sdata,
915 int powersave)
916{
917 struct sk_buff *skb;
d8cd189e 918 struct ieee80211_hdr_3addr *nullfunc;
b6f35301 919 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
965bedad 920
d8cd189e
KV		 921 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
922 if (!skb)
965bedad 923 return;
965bedad 924
d8cd189e 925 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
965bedad 926 if (powersave)
d8cd189e 927 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
965bedad 928
6c17b77b
SF		 929 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
930 IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
ff40b425
PF		 931
932 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
933 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
934
392b9ffb 935 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
b6f35301
RM		 936 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
937
62ae67be 938 ieee80211_tx_skb(sdata, skb);
965bedad
JB		 939}
940
d524215f
FF		 941static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
942 struct ieee80211_sub_if_data *sdata)
943{
944 struct sk_buff *skb;
945 struct ieee80211_hdr *nullfunc;
946 __le16 fc;
947
948 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
949 return;
950
951 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
d15b8459 952 if (!skb)
d524215f 953 return;
d15b8459 954
d524215f
FF		 955 skb_reserve(skb, local->hw.extra_tx_headroom);
956
957 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
958 memset(nullfunc, 0, 30);
959 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
960 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
961 nullfunc->frame_control = fc;
962 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
963 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
964 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
965 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
966
967 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
968 ieee80211_tx_skb(sdata, skb);
969}
970
cc32abd4
JB		 971/* spectrum management related things */
972static void ieee80211_chswitch_work(struct work_struct *work)
973{
974 struct ieee80211_sub_if_data *sdata =
975 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
675a0b04 976 struct ieee80211_local *local = sdata->local;
cc32abd4 977 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
7578d575 978 int ret;
cc32abd4 979
9607e6b6 980 if (!ieee80211_sdata_running(sdata))
cc32abd4
JB		 981 return;
982
8d61ffa5 983 sdata_lock(sdata);
4c3ebc56
MK		 984 mutex_lock(&local->mtx);
985 mutex_lock(&local->chanctx_mtx);
986
77fdaa12
JB		 987 if (!ifmgd->associated)
988 goto out;
cc32abd4 989
4c3ebc56
MK		 990 if (!sdata->vif.csa_active)
991 goto out;
992
993 /*
994 * using reservation isn't immediate as it may be deferred until later
995 * with multi-vif. once reservation is complete it will re-schedule the
996 * work with no reserved_chanctx so verify chandef to check if it
997 * completed successfully
998 */
999
1000 if (sdata->reserved_chanctx) {
1001 /*
1002 * with multi-vif csa driver may call ieee80211_csa_finish()
1003 * many times while waiting for other interfaces to use their
1004 * reservations
1005 */
1006 if (sdata->reserved_ready)
1007 goto out;
1008
1009 ret = ieee80211_vif_use_reserved_context(sdata);
1010 if (ret) {
1011 sdata_info(sdata,
1012 "failed to use reserved channel context, disconnecting (err=%d)\n",
1013 ret);
1014 ieee80211_queue_work(&sdata->local->hw,
1015 &ifmgd->csa_connection_drop_work);
1016 goto out;
1017 }
1018
1019 goto out;
1020 }
1021
1022 if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
1023 &sdata->csa_chandef)) {
7578d575 1024 sdata_info(sdata,
4c3ebc56 1025 "failed to finalize channel switch, disconnecting\n");
7578d575
AN		 1026 ieee80211_queue_work(&sdata->local->hw,
1027 &ifmgd->csa_connection_drop_work);
1028 goto out;
1029 }
675a0b04 1030
cc32abd4 1031 /* XXX: shouldn't really modify cfg80211-owned data! */
33787fc4 1032 ifmgd->associated->channel = sdata->csa_chandef.chan;
cc32abd4 1033
0c21e632
LC		 1034 ifmgd->csa_waiting_bcn = true;
1035
1036 ieee80211_sta_reset_beacon_monitor(sdata);
1037 ieee80211_sta_reset_conn_monitor(sdata);
1038
1039out:
1040 mutex_unlock(&local->chanctx_mtx);
1041 mutex_unlock(&local->mtx);
1042 sdata_unlock(sdata);
1043}
1044
1045static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata)
1046{
1047 struct ieee80211_local *local = sdata->local;
1048 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1049 int ret;
1050
1051 sdata_assert_lock(sdata);
1052
1053 WARN_ON(!sdata->vif.csa_active);
4c3ebc56 1054
a46992b4
LC		 1055 if (sdata->csa_block_tx) {
1056 ieee80211_wake_vif_queues(local, sdata,
1057 IEEE80211_QUEUE_STOP_REASON_CSA);
1058 sdata->csa_block_tx = false;
1059 }
7578d575 1060
0c21e632
LC		 1061 sdata->vif.csa_active = false;
1062 ifmgd->csa_waiting_bcn = false;
1063
f1d65583
LC		 1064 ret = drv_post_channel_switch(sdata);
1065 if (ret) {
1066 sdata_info(sdata,
1067 "driver post channel switch failed, disconnecting\n");
1068 ieee80211_queue_work(&local->hw,
1069 &ifmgd->csa_connection_drop_work);
0c21e632 1070 return;
f1d65583 1071 }
688b1ecf
LC		 1072
1073 cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef);
cc32abd4
JB		 1074}
1075
5ce6e438
JB		 1076void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1077{
55de908a
JB		 1078 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1079 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5ce6e438
JB		 1080
1081 trace_api_chswitch_done(sdata, success);
1082 if (!success) {
882a7c69
JB		 1083 sdata_info(sdata,
1084 "driver channel switch failed, disconnecting\n");
1085 ieee80211_queue_work(&sdata->local->hw,
1086 &ifmgd->csa_connection_drop_work);
1087 } else {
1088 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
5ce6e438 1089 }
5ce6e438
JB		 1090}
1091EXPORT_SYMBOL(ieee80211_chswitch_done);
1092
cc32abd4
JB		 1093static void ieee80211_chswitch_timer(unsigned long data)
1094{
1095 struct ieee80211_sub_if_data *sdata =
1096 (struct ieee80211_sub_if_data *) data;
5bb644a0 1097
9b7d72c1 1098 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
cc32abd4
JB		 1099}
1100
37799e52 1101static void
4a3cb702 1102ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
2ba45384
LC		 1103 u64 timestamp, u32 device_timestamp,
1104 struct ieee802_11_elems *elems,
04a161f4 1105 bool beacon)
cc32abd4 1106{
b4f286a1 1107 struct ieee80211_local *local = sdata->local;
cc32abd4 1108 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
37799e52 1109 struct cfg80211_bss *cbss = ifmgd->associated;
4c3ebc56 1110 struct ieee80211_chanctx_conf *conf;
55de908a 1111 struct ieee80211_chanctx *chanctx;
e6b7cde4 1112 enum ieee80211_band current_band;
c0f17eb9 1113 struct ieee80211_csa_ie csa_ie;
6d027bcc 1114 struct ieee80211_channel_switch ch_switch;
e6b7cde4 1115 int res;
cc32abd4 1116
8d61ffa5 1117 sdata_assert_lock(sdata);
77fdaa12 1118
37799e52 1119 if (!cbss)
cc32abd4
JB		 1120 return;
1121
b4f286a1 1122 if (local->scanning)
cc32abd4
JB		 1123 return;
1124
37799e52 1125 /* disregard subsequent announcements if we are already processing */
3e2a0226 1126 if (sdata->vif.csa_active)
cc32abd4
JB		 1127 return;
1128
e6b7cde4 1129 current_band = cbss->channel->band;
c0f17eb9 1130 memset(&csa_ie, 0, sizeof(csa_ie));
84469a45 1131 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band,
e6b7cde4 1132 ifmgd->flags,
c0f17eb9 1133 ifmgd->associated->bssid, &csa_ie);
e6b7cde4 1134 if (res < 0)
b4f286a1 1135 ieee80211_queue_work(&local->hw,
882a7c69 1136 &ifmgd->csa_connection_drop_work);
e6b7cde4 1137 if (res)
cc32abd4 1138 return;
cd64f2a9 1139
c0f17eb9 1140 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
85220d71
JB		 1141 IEEE80211_CHAN_DISABLED)) {
1142 sdata_info(sdata,
1143 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
e6b7cde4 1144 ifmgd->associated->bssid,
c0f17eb9
CYY		 1145 csa_ie.chandef.chan->center_freq,
1146 csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1147 csa_ie.chandef.center_freq2);
85220d71
JB		 1148 ieee80211_queue_work(&local->hw,
1149 &ifmgd->csa_connection_drop_work);
1150 return;
1151 }
1152
f84eaa10
JB		 1153 if (cfg80211_chandef_identical(&csa_ie.chandef,
1154 &sdata->vif.bss_conf.chandef)) {
1155 if (ifmgd->csa_ignored_same_chan)
1156 return;
1157 sdata_info(sdata,
1158 "AP %pM tries to chanswitch to same channel, ignore\n",
1159 ifmgd->associated->bssid);
1160 ifmgd->csa_ignored_same_chan = true;
1161 return;
1162 }
1163
4c3ebc56 1164 mutex_lock(&local->mtx);
7578d575 1165 mutex_lock(&local->chanctx_mtx);
4c3ebc56
MK		 1166 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1167 lockdep_is_held(&local->chanctx_mtx));
1168 if (!conf) {
1169 sdata_info(sdata,
1170 "no channel context assigned to vif?, disconnecting\n");
1171 ieee80211_queue_work(&local->hw,
1172 &ifmgd->csa_connection_drop_work);
1173 mutex_unlock(&local->chanctx_mtx);
1174 mutex_unlock(&local->mtx);
1175 return;
1176 }
1177
1178 chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1179
0f791eb4
LC		 1180 if (local->use_chanctx &&
1181 !(local->hw.flags & IEEE80211_HW_CHANCTX_STA_CSA)) {
1182 sdata_info(sdata,
1183 "driver doesn't support chan-switch with channel contexts\n");
1184 ieee80211_queue_work(&local->hw,
1185 &ifmgd->csa_connection_drop_work);
1186 mutex_unlock(&local->chanctx_mtx);
1187 mutex_unlock(&local->mtx);
1188 return;
55de908a
JB		 1189 }
1190
6d027bcc
LC		 1191 ch_switch.timestamp = timestamp;
1192 ch_switch.device_timestamp = device_timestamp;
1193 ch_switch.block_tx = csa_ie.mode;
1194 ch_switch.chandef = csa_ie.chandef;
1195 ch_switch.count = csa_ie.count;
1196
1197 if (drv_pre_channel_switch(sdata, &ch_switch)) {
1198 sdata_info(sdata,
1199 "preparing for channel switch failed, disconnecting\n");
1200 ieee80211_queue_work(&local->hw,
1201 &ifmgd->csa_connection_drop_work);
1202 mutex_unlock(&local->chanctx_mtx);
1203 mutex_unlock(&local->mtx);
1204 return;
1205 }
1206
4c3ebc56
MK		 1207 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1208 chanctx->mode, false);
1209 if (res) {
55de908a 1210 sdata_info(sdata,
4c3ebc56
MK		 1211 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1212 res);
b4f286a1 1213 ieee80211_queue_work(&local->hw,
55de908a 1214 &ifmgd->csa_connection_drop_work);
b4f286a1 1215 mutex_unlock(&local->chanctx_mtx);
4c3ebc56 1216 mutex_unlock(&local->mtx);
55de908a
JB		 1217 return;
1218 }
b4f286a1 1219 mutex_unlock(&local->chanctx_mtx);
55de908a 1220
c46a73f3 1221 sdata->vif.csa_active = true;
4c3ebc56 1222 sdata->csa_chandef = csa_ie.chandef;
59af6928 1223 sdata->csa_block_tx = csa_ie.mode;
f84eaa10 1224 ifmgd->csa_ignored_same_chan = false;
55de908a 1225
59af6928 1226 if (sdata->csa_block_tx)
a46992b4
LC		 1227 ieee80211_stop_vif_queues(local, sdata,
1228 IEEE80211_QUEUE_STOP_REASON_CSA);
59af6928 1229 mutex_unlock(&local->mtx);
57eebdf3 1230
2f457293
LC		 1231 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef,
1232 csa_ie.count);
1233
b4f286a1 1234 if (local->ops->channel_switch) {
5ce6e438 1235 /* use driver's channel switch callback */
0f791eb4 1236 drv_channel_switch(local, sdata, &ch_switch);
5ce6e438
JB		 1237 return;
1238 }
1239
1240 /* channel switch handled in software */
c0f17eb9 1241 if (csa_ie.count <= 1)
b4f286a1 1242 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
57eebdf3 1243 else
cc32abd4 1244 mod_timer(&ifmgd->chswitch_timer,
ff1e417c
LC		 1245 TU_TO_EXP_TIME((csa_ie.count - 1) *
1246 cbss->beacon_interval));
cc32abd4
JB		 1247}
1248
24a4e400
SG		 1249static bool
1250ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1251 struct ieee80211_channel *channel,
1252 const u8 *country_ie, u8 country_ie_len,
1253 const u8 *pwr_constr_elem,
1254 int *chan_pwr, int *pwr_reduction)
cc32abd4 1255{
04b7b2ff
JB		 1256 struct ieee80211_country_ie_triplet *triplet;
1257 int chan = ieee80211_frequency_to_channel(channel->center_freq);
24a4e400 1258 int i, chan_increment;
04b7b2ff 1259 bool have_chan_pwr = false;
cc32abd4 1260
04b7b2ff
JB		 1261 /* Invalid IE */
1262 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
24a4e400 1263 return false;
cc32abd4 1264
04b7b2ff
JB		 1265 triplet = (void *)(country_ie + 3);
1266 country_ie_len -= 3;
1267
1268 switch (channel->band) {
1269 default:
1270 WARN_ON_ONCE(1);
1271 /* fall through */
1272 case IEEE80211_BAND_2GHZ:
1273 case IEEE80211_BAND_60GHZ:
1274 chan_increment = 1;
1275 break;
1276 case IEEE80211_BAND_5GHZ:
1277 chan_increment = 4;
1278 break;
cc32abd4 1279 }
04b7b2ff
JB		 1280
1281 /* find channel */
1282 while (country_ie_len >= 3) {
1283 u8 first_channel = triplet->chans.first_channel;
1284
1285 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1286 goto next;
1287
1288 for (i = 0; i < triplet->chans.num_channels; i++) {
1289 if (first_channel + i * chan_increment == chan) {
1290 have_chan_pwr = true;
24a4e400 1291 *chan_pwr = triplet->chans.max_power;
04b7b2ff
JB		 1292 break;
1293 }
1294 }
1295 if (have_chan_pwr)
1296 break;
1297
1298 next:
1299 triplet++;
1300 country_ie_len -= 3;
1301 }
1302
a5fee9cb 1303 if (have_chan_pwr && pwr_constr_elem)
24a4e400 1304 *pwr_reduction = *pwr_constr_elem;
a5fee9cb
MB		 1305 else
1306 *pwr_reduction = 0;
1307
24a4e400
SG		 1308 return have_chan_pwr;
1309}
1310
c8d65917
SG		 1311static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
1312 struct ieee80211_channel *channel,
1313 const u8 *cisco_dtpc_ie,
1314 int *pwr_level)
1315{
1316 /* From practical testing, the first data byte of the DTPC element
1317 * seems to contain the requested dBm level, and the CLI on Cisco
1318 * APs clearly state the range is -127 to 127 dBm, which indicates
1319 * a signed byte, although it seemingly never actually goes negative.
1320 * The other byte seems to always be zero.
1321 */
1322 *pwr_level = (__s8)cisco_dtpc_ie[4];
1323}
1324
24a4e400
SG		 1325static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1326 struct ieee80211_channel *channel,
1327 struct ieee80211_mgmt *mgmt,
1328 const u8 *country_ie, u8 country_ie_len,
c8d65917
SG		 1329 const u8 *pwr_constr_ie,
1330 const u8 *cisco_dtpc_ie)
24a4e400 1331{
c8d65917
SG		 1332 bool has_80211h_pwr = false, has_cisco_pwr = false;
1333 int chan_pwr = 0, pwr_reduction_80211h = 0;
1334 int pwr_level_cisco, pwr_level_80211h;
24a4e400 1335 int new_ap_level;
a5fee9cb 1336 __le16 capab = mgmt->u.probe_resp.capab_info;
04b7b2ff 1337
a5fee9cb
MB		 1338 if (country_ie &&
1339 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) ||
1340 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) {
24a4e400
SG		 1341 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
1342 sdata, channel, country_ie, country_ie_len,
1343 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
c8d65917
SG		 1344 pwr_level_80211h =
1345 max_t(int, 0, chan_pwr - pwr_reduction_80211h);
1346 }
1347
1348 if (cisco_dtpc_ie) {
1349 ieee80211_find_cisco_dtpc(
1350 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
1351 has_cisco_pwr = true;
24a4e400 1352 }
04b7b2ff 1353
c8d65917 1354 if (!has_80211h_pwr && !has_cisco_pwr)
1ea6f9c0 1355 return 0;
04b7b2ff 1356
c8d65917
SG		 1357 /* If we have both 802.11h and Cisco DTPC, apply both limits
1358 * by picking the smallest of the two power levels advertised.
1359 */
1360 if (has_80211h_pwr &&
1361 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
1362 sdata_info(sdata,
1363 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1364 pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
1365 sdata->u.mgd.bssid);
1366 new_ap_level = pwr_level_80211h;
1367 } else { /* has_cisco_pwr is always true here. */
1368 sdata_info(sdata,
1369 "Limiting TX power to %d dBm as advertised by %pM\n",
1370 pwr_level_cisco, sdata->u.mgd.bssid);
1371 new_ap_level = pwr_level_cisco;
1372 }
04b7b2ff 1373
1ea6f9c0
JB		 1374 if (sdata->ap_power_level == new_ap_level)
1375 return 0;
04b7b2ff 1376
1ea6f9c0
JB		 1377 sdata->ap_power_level = new_ap_level;
1378 if (__ieee80211_recalc_txpower(sdata))
1379 return BSS_CHANGED_TXPOWER;
1380 return 0;
cc32abd4
JB		 1381}
1382
965bedad
JB		 1383/* powersave */
1384static void ieee80211_enable_ps(struct ieee80211_local *local,
1385 struct ieee80211_sub_if_data *sdata)
1386{
1387 struct ieee80211_conf *conf = &local->hw.conf;
1388
d5edaedc
JB		 1389 /*
1390 * If we are scanning right now then the parameters will
1391 * take effect when scan finishes.
1392 */
fbe9c429 1393 if (local->scanning)
d5edaedc
JB		 1394 return;
1395
965bedad
JB		 1396 if (conf->dynamic_ps_timeout > 0 &&
1397 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
1398 mod_timer(&local->dynamic_ps_timer, jiffies +
1399 msecs_to_jiffies(conf->dynamic_ps_timeout));
1400 } else {
1401 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1402 ieee80211_send_nullfunc(local, sdata, 1);
375177bf 1403
2a13052f
JO		 1404 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1405 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
1406 return;
1407
1408 conf->flags |= IEEE80211_CONF_PS;
1409 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965bedad
JB		 1410 }
1411}
1412
1413static void ieee80211_change_ps(struct ieee80211_local *local)
1414{
1415 struct ieee80211_conf *conf = &local->hw.conf;
1416
1417 if (local->ps_sdata) {
965bedad
JB		 1418 ieee80211_enable_ps(local, local->ps_sdata);
1419 } else if (conf->flags & IEEE80211_CONF_PS) {
1420 conf->flags &= ~IEEE80211_CONF_PS;
1421 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1422 del_timer_sync(&local->dynamic_ps_timer);
1423 cancel_work_sync(&local->dynamic_ps_enable_work);
1424 }
1425}
1426
808118cb
JY		 1427static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1428{
1429 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1430 struct sta_info *sta = NULL;
c2c98fde 1431 bool authorized = false;
808118cb
JY		 1432
1433 if (!mgd->powersave)
1434 return false;
1435
05cb9108
JB		 1436 if (mgd->broken_ap)
1437 return false;
1438
808118cb
JY		 1439 if (!mgd->associated)
1440 return false;
1441
392b9ffb 1442 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
808118cb
JY		 1443 return false;
1444
989c6505 1445 if (!mgd->have_beacon)
ce857888
AB		 1446 return false;
1447
808118cb
JY		 1448 rcu_read_lock();
1449 sta = sta_info_get(sdata, mgd->bssid);
1450 if (sta)
c2c98fde 1451 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
808118cb
JY		 1452 rcu_read_unlock();
1453
c2c98fde 1454 return authorized;
808118cb
JY		 1455}
1456
965bedad 1457/* need to hold RTNL or interface lock */
10f644a4 1458void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 1459{
1460 struct ieee80211_sub_if_data *sdata, *found = NULL;
1461 int count = 0;
195e294d 1462 int timeout;
965bedad
JB		 1463
1464 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
1465 local->ps_sdata = NULL;
1466 return;
1467 }
1468
1469 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 1470 if (!ieee80211_sdata_running(sdata))
965bedad 1471 continue;
8c7914de
RM		 1472 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1473 /* If an AP vif is found, then disable PS
1474 * by setting the count to zero thereby setting
1475 * ps_sdata to NULL.
1476 */
1477 count = 0;
1478 break;
1479 }
965bedad
JB		 1480 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1481 continue;
1482 found = sdata;
1483 count++;
1484 }
1485
808118cb 1486 if (count == 1 && ieee80211_powersave_allowed(found)) {
10f644a4
JB		 1487 s32 beaconint_us;
1488
1489 if (latency < 0)
ed77134b 1490 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
10f644a4
JB		 1491
1492 beaconint_us = ieee80211_tu_to_usec(
1493 found->vif.bss_conf.beacon_int);
1494
ff616381 1495 timeout = local->dynamic_ps_forced_timeout;
195e294d
JO		 1496 if (timeout < 0) {
1497 /*
ff616381
JO		 1498 * Go to full PSM if the user configures a very low
1499 * latency requirement.
0ab82b04
EP		 1500 * The 2000 second value is there for compatibility
1501 * until the PM_QOS_NETWORK_LATENCY is configured
1502 * with real values.
195e294d 1503 */
0ab82b04
EP		 1504 if (latency > (1900 * USEC_PER_MSEC) &&
1505 latency != (2000 * USEC_PER_SEC))
195e294d 1506 timeout = 0;
ff616381
JO		 1507 else
1508 timeout = 100;
195e294d 1509 }
09b85568 1510 local->hw.conf.dynamic_ps_timeout = timeout;
195e294d 1511
04fe2037 1512 if (beaconint_us > latency) {
10f644a4 1513 local->ps_sdata = NULL;
04fe2037 1514 } else {
04fe2037 1515 int maxslp = 1;
826262c3 1516 u8 dtimper = found->u.mgd.dtim_period;
56007a02
JB		 1517
1518 /* If the TIM IE is invalid, pretend the value is 1 */
1519 if (!dtimper)
1520 dtimper = 1;
1521 else if (dtimper > 1)
04fe2037
JB		 1522 maxslp = min_t(int, dtimper,
1523 latency / beaconint_us);
1524
9ccebe61 1525 local->hw.conf.max_sleep_period = maxslp;
56007a02 1526 local->hw.conf.ps_dtim_period = dtimper;
10f644a4 1527 local->ps_sdata = found;
04fe2037 1528 }
10f644a4 1529 } else {
965bedad 1530 local->ps_sdata = NULL;
10f644a4 1531 }
965bedad
JB		 1532
1533 ieee80211_change_ps(local);
1534}
1535
ab095877
EP		 1536void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1537{
1538 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1539
1540 if (sdata->vif.bss_conf.ps != ps_allowed) {
1541 sdata->vif.bss_conf.ps = ps_allowed;
1542 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1543 }
1544}
1545
965bedad
JB		 1546void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1547{
1548 struct ieee80211_local *local =
1549 container_of(work, struct ieee80211_local,
1550 dynamic_ps_disable_work);
1551
1552 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1553 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1554 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1555 }
1556
1557 ieee80211_wake_queues_by_reason(&local->hw,
445ea4e8 1558 IEEE80211_MAX_QUEUE_MAP,
cca07b00
LC		 1559 IEEE80211_QUEUE_STOP_REASON_PS,
1560 false);
965bedad
JB		 1561}
1562
1563void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1564{
1565 struct ieee80211_local *local =
1566 container_of(work, struct ieee80211_local,
1567 dynamic_ps_enable_work);
1568 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
5e34069c 1569 struct ieee80211_if_managed *ifmgd;
1ddc2867
RM		 1570 unsigned long flags;
1571 int q;
965bedad
JB		 1572
1573 /* can only happen when PS was just disabled anyway */
1574 if (!sdata)
1575 return;
1576
5e34069c
CL		 1577 ifmgd = &sdata->u.mgd;
1578
965bedad
JB		 1579 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1580 return;
1581
09b85568 1582 if (local->hw.conf.dynamic_ps_timeout > 0) {
77b7023a
AN		 1583 /* don't enter PS if TX frames are pending */
1584 if (drv_tx_frames_pending(local)) {
1ddc2867
RM		 1585 mod_timer(&local->dynamic_ps_timer, jiffies +
1586 msecs_to_jiffies(
1587 local->hw.conf.dynamic_ps_timeout));
1588 return;
1589 }
77b7023a
AN		 1590
1591 /*
1592 * transmission can be stopped by others which leads to
1593 * dynamic_ps_timer expiry. Postpone the ps timer if it
1594 * is not the actual idle state.
1595 */
1596 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1597 for (q = 0; q < local->hw.queues; q++) {
1598 if (local->queue_stop_reasons[q]) {
1599 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1600 flags);
1601 mod_timer(&local->dynamic_ps_timer, jiffies +
1602 msecs_to_jiffies(
1603 local->hw.conf.dynamic_ps_timeout));
1604 return;
1605 }
1606 }
1607 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1ddc2867 1608 }
1ddc2867 1609
375177bf 1610 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
9c38a8b4 1611 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
a1598383 1612 if (drv_tx_frames_pending(local)) {
e8306f98
VN		 1613 mod_timer(&local->dynamic_ps_timer, jiffies +
1614 msecs_to_jiffies(
1615 local->hw.conf.dynamic_ps_timeout));
a1598383 1616 } else {
e8306f98
VN		 1617 ieee80211_send_nullfunc(local, sdata, 1);
1618 /* Flush to get the tx status of nullfunc frame */
3b24f4c6 1619 ieee80211_flush_queues(local, sdata, false);
e8306f98 1620 }
f3e85b9e
VN		 1621 }
1622
2a13052f
JO		 1623 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1624 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
375177bf
VN		 1625 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1626 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1627 local->hw.conf.flags |= IEEE80211_CONF_PS;
1628 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1629 }
965bedad
JB		 1630}
1631
1632void ieee80211_dynamic_ps_timer(unsigned long data)
1633{
1634 struct ieee80211_local *local = (void *) data;
1635
78f1a8b7 1636 if (local->quiescing || local->suspended)
5bb644a0
JB		 1637 return;
1638
42935eca 1639 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 1640}
1641
164eb02d
SW		 1642void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1643{
1644 struct delayed_work *delayed_work =
1645 container_of(work, struct delayed_work, work);
1646 struct ieee80211_sub_if_data *sdata =
1647 container_of(delayed_work, struct ieee80211_sub_if_data,
1648 dfs_cac_timer_work);
d2859df5 1649 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
164eb02d 1650
34a3740d
JB		 1651 mutex_lock(&sdata->local->mtx);
1652 if (sdata->wdev.cac_started) {
1653 ieee80211_vif_release_channel(sdata);
1654 cfg80211_cac_event(sdata->dev, &chandef,
1655 NL80211_RADAR_CAC_FINISHED,
1656 GFP_KERNEL);
1657 }
1658 mutex_unlock(&sdata->local->mtx);
164eb02d
SW		 1659}
1660
02219b3a
JB		 1661static bool
1662__ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1663{
1664 struct ieee80211_local *local = sdata->local;
1665 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
cc72f6e2 1666 bool ret = false;
02219b3a
JB		 1667 int ac;
1668
1669 if (local->hw.queues < IEEE80211_NUM_ACS)
1670 return false;
1671
1672 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1673 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
1674 int non_acm_ac;
1675 unsigned long now = jiffies;
1676
1677 if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
1678 tx_tspec->admitted_time &&
1679 time_after(now, tx_tspec->time_slice_start + HZ)) {
1680 tx_tspec->consumed_tx_time = 0;
1681 tx_tspec->time_slice_start = now;
1682
1683 if (tx_tspec->downgraded)
1684 tx_tspec->action =
1685 TX_TSPEC_ACTION_STOP_DOWNGRADE;
1686 }
1687
1688 switch (tx_tspec->action) {
1689 case TX_TSPEC_ACTION_STOP_DOWNGRADE:
1690 /* take the original parameters */
1691 if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac]))
1692 sdata_err(sdata,
1693 "failed to set TX queue parameters for queue %d\n",
1694 ac);
1695 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1696 tx_tspec->downgraded = false;
1697 ret = true;
1698 break;
1699 case TX_TSPEC_ACTION_DOWNGRADE:
1700 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
1701 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1702 ret = true;
1703 break;
1704 }
1705 /* downgrade next lower non-ACM AC */
1706 for (non_acm_ac = ac + 1;
1707 non_acm_ac < IEEE80211_NUM_ACS;
1708 non_acm_ac++)
1709 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
1710 break;
1711 /* The loop will result in using BK even if it requires
1712 * admission control, such configuration makes no sense
1713 * and we have to transmit somehow - the AC selection
1714 * does the same thing.
1715 */
1716 if (drv_conf_tx(local, sdata, ac,
1717 &sdata->tx_conf[non_acm_ac]))
1718 sdata_err(sdata,
1719 "failed to set TX queue parameters for queue %d\n",
1720 ac);
1721 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1722 ret = true;
1723 schedule_delayed_work(&ifmgd->tx_tspec_wk,
1724 tx_tspec->time_slice_start + HZ - now + 1);
1725 break;
1726 case TX_TSPEC_ACTION_NONE:
1727 /* nothing now */
1728 break;
1729 }
1730 }
1731
1732 return ret;
1733}
1734
1735void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1736{
1737 if (__ieee80211_sta_handle_tspec_ac_params(sdata))
1738 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1739}
1740
1741static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
1742{
1743 struct ieee80211_sub_if_data *sdata;
1744
1745 sdata = container_of(work, struct ieee80211_sub_if_data,
1746 u.mgd.tx_tspec_wk.work);
1747 ieee80211_sta_handle_tspec_ac_params(sdata);
1748}
1749
60f8b39c 1750/* MLME */
7d25745d 1751static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
4ced3f74 1752 struct ieee80211_sub_if_data *sdata,
4a3cb702 1753 const u8 *wmm_param, size_t wmm_param_len)
f0706e82 1754{
f0706e82 1755 struct ieee80211_tx_queue_params params;
4ced3f74 1756 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1757 size_t left;
1758 int count;
4a3cb702
JB		 1759 const u8 *pos;
1760 u8 uapsd_queues = 0;
f0706e82 1761
e1b3ec1a 1762 if (!local->ops->conf_tx)
7d25745d 1763 return false;
e1b3ec1a 1764
32c5057b 1765 if (local->hw.queues < IEEE80211_NUM_ACS)
7d25745d 1766 return false;
3434fbd3
JB		 1767
1768 if (!wmm_param)
7d25745d 1769 return false;
3434fbd3 1770
f0706e82 1771 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
7d25745d 1772 return false;
ab13315a
KV		 1773
1774 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
dc41e4d4 1775 uapsd_queues = ifmgd->uapsd_queues;
ab13315a 1776
f0706e82 1777 count = wmm_param[6] & 0x0f;
46900298 1778 if (count == ifmgd->wmm_last_param_set)
7d25745d 1779 return false;
46900298 1780 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 1781
1782 pos = wmm_param + 8;
1783 left = wmm_param_len - 8;
1784
1785 memset(&params, 0, sizeof(params));
1786
00e96dec 1787 sdata->wmm_acm = 0;
f0706e82
JB		 1788 for (; left >= 4; left -= 4, pos += 4) {
1789 int aci = (pos[0] >> 5) & 0x03;
1790 int acm = (pos[0] >> 4) & 0x01;
ab13315a 1791 bool uapsd = false;
f0706e82
JB		 1792 int queue;
1793
1794 switch (aci) {
0eeb59fe 1795 case 1: /* AC_BK */
e100bb64 1796 queue = 3;
988c0f72 1797 if (acm)
00e96dec 1798 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV		 1799 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1800 uapsd = true;
f0706e82 1801 break;
0eeb59fe 1802 case 2: /* AC_VI */
e100bb64 1803 queue = 1;
988c0f72 1804 if (acm)
00e96dec 1805 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV		 1806 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1807 uapsd = true;
f0706e82 1808 break;
0eeb59fe 1809 case 3: /* AC_VO */
e100bb64 1810 queue = 0;
988c0f72 1811 if (acm)
00e96dec 1812 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV		 1813 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1814 uapsd = true;
f0706e82 1815 break;
0eeb59fe 1816 case 0: /* AC_BE */
f0706e82 1817 default:
e100bb64 1818 queue = 2;
988c0f72 1819 if (acm)
00e96dec 1820 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV		 1821 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1822 uapsd = true;
f0706e82
JB		 1823 break;
1824 }
1825
1826 params.aifs = pos[0] & 0x0f;
1827 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1828 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 1829 params.txop = get_unaligned_le16(pos + 2);
908f8d07 1830 params.acm = acm;
ab13315a
KV		 1831 params.uapsd = uapsd;
1832
bdcbd8e0 1833 mlme_dbg(sdata,
02219b3a 1834 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
bdcbd8e0
JB		 1835 queue, aci, acm,
1836 params.aifs, params.cw_min, params.cw_max,
02219b3a
JB		 1837 params.txop, params.uapsd,
1838 ifmgd->tx_tspec[queue].downgraded);
f6f3def3 1839 sdata->tx_conf[queue] = params;
02219b3a
JB		 1840 if (!ifmgd->tx_tspec[queue].downgraded &&
1841 drv_conf_tx(local, sdata, queue, &params))
bdcbd8e0
JB		 1842 sdata_err(sdata,
1843 "failed to set TX queue parameters for queue %d\n",
1844 queue);
f0706e82 1845 }
e1b3ec1a
SG		 1846
1847 /* enable WMM or activate new settings */
4ced3f74 1848 sdata->vif.bss_conf.qos = true;
7d25745d 1849 return true;
f0706e82
JB		 1850}
1851
925e64c3
SG		 1852static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1853{
1854 lockdep_assert_held(&sdata->local->mtx);
1855
392b9ffb 1856 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
925e64c3
SG		 1857 ieee80211_run_deferred_scan(sdata->local);
1858}
1859
1860static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1861{
1862 mutex_lock(&sdata->local->mtx);
1863 __ieee80211_stop_poll(sdata);
1864 mutex_unlock(&sdata->local->mtx);
1865}
1866
7a5158ef
JB		 1867static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1868 u16 capab, bool erp_valid, u8 erp)
5628221c 1869{
bda3933a 1870 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 1871 u32 changed = 0;
7a5158ef
JB		 1872 bool use_protection;
1873 bool use_short_preamble;
1874 bool use_short_slot;
1875
1876 if (erp_valid) {
1877 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1878 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1879 } else {
1880 use_protection = false;
1881 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1882 }
1883
1884 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
55de908a 1885 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
43d35343 1886 use_short_slot = true;
5628221c 1887
471b3efd 1888 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 1889 bss_conf->use_cts_prot = use_protection;
1890 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 1891 }
7e9ed188 1892
d43c7b37 1893 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 1894 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 1895 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 1896 }
d9430a32 1897
7a5158ef 1898 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 1899 bss_conf->use_short_slot = use_short_slot;
1900 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 1901 }
1902
1903 return changed;
1904}
1905
f698d856 1906static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 1907 struct cfg80211_bss *cbss,
ae5eb026 1908 u32 bss_info_changed)
f0706e82 1909{
0c1ad2ca 1910 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 1911 struct ieee80211_local *local = sdata->local;
68542962 1912 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
d6f2da5b 1913
ae5eb026 1914 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 1915 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
50ae34a2 1916 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 1917
7ccc8bd7 1918 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
59c1ec2b 1919 beacon_loss_count * bss_conf->beacon_int));
7ccc8bd7 1920
0c1ad2ca
JB		 1921 sdata->u.mgd.associated = cbss;
1922 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 1923
17e4ec14
JM		 1924 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1925
488dd7b5 1926 if (sdata->vif.p2p) {
9caf0364 1927 const struct cfg80211_bss_ies *ies;
488dd7b5 1928
9caf0364
JB		 1929 rcu_read_lock();
1930 ies = rcu_dereference(cbss->ies);
1931 if (ies) {
9caf0364
JB		 1932 int ret;
1933
1934 ret = cfg80211_get_p2p_attr(
1935 ies->data, ies->len,
1936 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
67baf663
JD		 1937 (u8 *) &bss_conf->p2p_noa_attr,
1938 sizeof(bss_conf->p2p_noa_attr));
9caf0364 1939 if (ret >= 2) {
67baf663
JD		 1940 sdata->u.mgd.p2p_noa_index =
1941 bss_conf->p2p_noa_attr.index;
9caf0364 1942 bss_info_changed |= BSS_CHANGED_P2P_PS;
9caf0364 1943 }
488dd7b5 1944 }
9caf0364 1945 rcu_read_unlock();
488dd7b5
JB		 1946 }
1947
b291ba11 1948 /* just to be sure */
925e64c3 1949 ieee80211_stop_poll(sdata);
b291ba11 1950
9ac19a90 1951 ieee80211_led_assoc(local, 1);
9306102e 1952
989c6505 1953 if (sdata->u.mgd.have_beacon) {
826262c3
JB		 1954 /*
1955 * If the AP is buggy we may get here with no DTIM period
1956 * known, so assume it's 1 which is the only safe assumption
1957 * in that case, although if the TIM IE is broken powersave
1958 * probably just won't work at all.
1959 */
1960 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
817cee76 1961 bss_conf->beacon_rate = bss->beacon_rate;
989c6505 1962 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
826262c3 1963 } else {
817cee76 1964 bss_conf->beacon_rate = NULL;
e5b900d2 1965 bss_conf->dtim_period = 0;
826262c3 1966 }
e5b900d2 1967
68542962 1968 bss_conf->assoc = 1;
9cef8737 1969
a97c13c3 1970 /* Tell the driver to monitor connection quality (if supported) */
ea086359 1971 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
68542962 1972 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 1973 bss_info_changed |= BSS_CHANGED_CQM;
1974
68542962 1975 /* Enable ARP filtering */
0f19b41e 1976 if (bss_conf->arp_addr_cnt)
68542962 1977 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
68542962 1978
ae5eb026 1979 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 1980
056508dc
JB		 1981 mutex_lock(&local->iflist_mtx);
1982 ieee80211_recalc_ps(local, -1);
1983 mutex_unlock(&local->iflist_mtx);
e0cb686f 1984
04ecd257 1985 ieee80211_recalc_smps(sdata);
ab095877
EP		 1986 ieee80211_recalc_ps_vif(sdata);
1987
9ac19a90 1988 netif_carrier_on(sdata->dev);
f0706e82
JB		 1989}
1990
e69e95db 1991static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
37ad3888
JB		 1992 u16 stype, u16 reason, bool tx,
1993 u8 *frame_buf)
aa458d17 1994{
46900298 1995 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17 1996 struct ieee80211_local *local = sdata->local;
3cc5240b 1997 u32 changed = 0;
aa458d17 1998
8d61ffa5 1999 sdata_assert_lock(sdata);
77fdaa12 2000
37ad3888
JB		 2001 if (WARN_ON_ONCE(tx && !frame_buf))
2002 return;
2003
b291ba11
JB		 2004 if (WARN_ON(!ifmgd->associated))
2005 return;
2006
79543d8e
DS		 2007 ieee80211_stop_poll(sdata);
2008
77fdaa12 2009 ifmgd->associated = NULL;
aa458d17
TW		 2010 netif_carrier_off(sdata->dev);
2011
88bc40e8
EP		 2012 /*
2013 * if we want to get out of ps before disassoc (why?) we have
2014 * to do it before sending disassoc, as otherwise the null-packet
2015 * won't be valid.
2016 */
2017 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2018 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2019 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2020 }
2021 local->ps_sdata = NULL;
2022
ab095877
EP		 2023 /* disable per-vif ps */
2024 ieee80211_recalc_ps_vif(sdata);
2025
14f2ae83
EG		 2026 /* make sure ongoing transmission finishes */
2027 synchronize_net();
2028
3b24f4c6
EG		 2029 /*
2030 * drop any frame before deauth/disassoc, this can be data or
2031 * management frame. Since we are disconnecting, we should not
2032 * insist sending these frames which can take time and delay
2033 * the disconnection and possible the roaming.
2034 */
f823981e 2035 if (tx)
3b24f4c6 2036 ieee80211_flush_queues(local, sdata, true);
f823981e 2037
37ad3888
JB		 2038 /* deauthenticate/disassociate now */
2039 if (tx || frame_buf)
88a9e31c
EP		 2040 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
2041 reason, tx, frame_buf);
37ad3888 2042
3b24f4c6 2043 /* flush out frame - make sure the deauth was actually sent */
37ad3888 2044 if (tx)
3b24f4c6 2045 ieee80211_flush_queues(local, sdata, false);
37ad3888 2046
88a9e31c
EP		 2047 /* clear bssid only after building the needed mgmt frames */
2048 memset(ifmgd->bssid, 0, ETH_ALEN);
2049
37ad3888 2050 /* remove AP and TDLS peers */
d34ba216 2051 sta_info_flush(sdata);
37ad3888
JB		 2052
2053 /* finally reset all BSS / config parameters */
f5e5bf25
TW		 2054 changed |= ieee80211_reset_erp_info(sdata);
2055
f5e5bf25 2056 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 2057 changed |= BSS_CHANGED_ASSOC;
2058 sdata->vif.bss_conf.assoc = false;
f5e5bf25 2059
67baf663
JD		 2060 ifmgd->p2p_noa_index = -1;
2061 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
2062 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
488dd7b5 2063
dd5ecfea 2064 /* on the next assoc, re-program HT/VHT parameters */
ef96a842
BG		 2065 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
2066 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
dd5ecfea
JB		 2067 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
2068 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
413ad50a 2069
1ea6f9c0 2070 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
a8302de9 2071
520eb820
KV		 2072 del_timer_sync(&local->dynamic_ps_timer);
2073 cancel_work_sync(&local->dynamic_ps_enable_work);
2074
68542962 2075 /* Disable ARP filtering */
0f19b41e 2076 if (sdata->vif.bss_conf.arp_addr_cnt)
68542962 2077 changed |= BSS_CHANGED_ARP_FILTER;
68542962 2078
3abead59
JB		 2079 sdata->vif.bss_conf.qos = false;
2080 changed |= BSS_CHANGED_QOS;
2081
0aaffa9b
JB		 2082 /* The BSSID (not really interesting) and HT changed */
2083 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 2084 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 2085
3abead59
JB		 2086 /* disassociated - set to defaults now */
2087 ieee80211_set_wmm_default(sdata, false);
2088
b9dcf712
JB		 2089 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
2090 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
2091 del_timer_sync(&sdata->u.mgd.timer);
2092 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2d9957cc 2093
826262c3 2094 sdata->vif.bss_conf.dtim_period = 0;
817cee76
AB		 2095 sdata->vif.bss_conf.beacon_rate = NULL;
2096
989c6505 2097 ifmgd->have_beacon = false;
826262c3 2098
028e8da0 2099 ifmgd->flags = 0;
34a3740d 2100 mutex_lock(&local->mtx);
028e8da0 2101 ieee80211_vif_release_channel(sdata);
59af6928
MK		 2102
2103 sdata->vif.csa_active = false;
0c21e632 2104 ifmgd->csa_waiting_bcn = false;
f84eaa10 2105 ifmgd->csa_ignored_same_chan = false;
a46992b4
LC		 2106 if (sdata->csa_block_tx) {
2107 ieee80211_wake_vif_queues(local, sdata,
2108 IEEE80211_QUEUE_STOP_REASON_CSA);
2109 sdata->csa_block_tx = false;
2110 }
34a3740d 2111 mutex_unlock(&local->mtx);
2475b1cc 2112
02219b3a
JB		 2113 /* existing TX TSPEC sessions no longer exist */
2114 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
2115 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
2116
2475b1cc 2117 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
aa458d17 2118}
f0706e82 2119
3cf335d5
KV		 2120void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
2121 struct ieee80211_hdr *hdr)
2122{
2123 /*
2124 * We can postpone the mgd.timer whenever receiving unicast frames
2125 * from AP because we know that the connection is working both ways
2126 * at that time. But multicast frames (and hence also beacons) must
2127 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 2128 * data idle periods for sending the periodic probe request to the
2129 * AP we're connected to.
3cf335d5 2130 */
b291ba11
JB		 2131 if (is_multicast_ether_addr(hdr->addr1))
2132 return;
2133
be099e82 2134 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 2135}
f0706e82 2136
4e5ff376
FF		 2137static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
2138{
2139 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
133d40f9 2140 struct ieee80211_local *local = sdata->local;
4e5ff376 2141
133d40f9 2142 mutex_lock(&local->mtx);
392b9ffb
SG		 2143 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
2144 goto out;
4e5ff376 2145
925e64c3 2146 __ieee80211_stop_poll(sdata);
133d40f9
SG		 2147
2148 mutex_lock(&local->iflist_mtx);
2149 ieee80211_recalc_ps(local, -1);
2150 mutex_unlock(&local->iflist_mtx);
4e5ff376
FF		 2151
2152 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
133d40f9 2153 goto out;
4e5ff376
FF		 2154
2155 /*
2156 * We've received a probe response, but are not sure whether
2157 * we have or will be receiving any beacons or data, so let's
2158 * schedule the timers again, just in case.
2159 */
2160 ieee80211_sta_reset_beacon_monitor(sdata);
2161
2162 mod_timer(&ifmgd->conn_mon_timer,
2163 round_jiffies_up(jiffies +
2164 IEEE80211_CONNECTION_IDLE_TIME));
133d40f9 2165out:
133d40f9 2166 mutex_unlock(&local->mtx);
4e5ff376
FF		 2167}
2168
02219b3a
JB		 2169static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
2170 struct ieee80211_hdr *hdr,
2171 u16 tx_time)
2172{
2173 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2174 u16 tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
2175 int ac = ieee80211_ac_from_tid(tid);
2176 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
2177 unsigned long now = jiffies;
2178
2179 if (likely(!tx_tspec->admitted_time))
2180 return;
2181
2182 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2183 tx_tspec->consumed_tx_time = 0;
2184 tx_tspec->time_slice_start = now;
2185
2186 if (tx_tspec->downgraded) {
2187 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
2188 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2189 }
2190 }
2191
2192 if (tx_tspec->downgraded)
2193 return;
2194
2195 tx_tspec->consumed_tx_time += tx_time;
2196
2197 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
2198 tx_tspec->downgraded = true;
2199 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
2200 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2201 }
2202}
2203
4e5ff376 2204void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
02219b3a 2205 struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
4e5ff376 2206{
02219b3a
JB		 2207 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
2208
75706d0e 2209 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF		 2210 return;
2211
4e5ff376
FF		 2212 if (ieee80211_is_nullfunc(hdr->frame_control) &&
2213 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e 2214 if (ack)
cab1c7fd 2215 ieee80211_sta_reset_conn_monitor(sdata);
04ac3c0e
FF		 2216 else
2217 sdata->u.mgd.nullfunc_failed = true;
4e5ff376 2218 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
cab1c7fd 2219 return;
4e5ff376 2220 }
cab1c7fd
WD		 2221
2222 if (ack)
2223 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF		 2224}
2225
a43abf29
ML		 2226static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2227{
2228 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2229 const u8 *ssid;
f01a067d 2230 u8 *dst = ifmgd->associated->bssid;
180205bd 2231 u8 unicast_limit = max(1, max_probe_tries - 3);
f01a067d
LR		 2232
2233 /*
2234 * Try sending broadcast probe requests for the last three
2235 * probe requests after the first ones failed since some
2236 * buggy APs only support broadcast probe requests.
2237 */
2238 if (ifmgd->probe_send_count >= unicast_limit)
2239 dst = NULL;
a43abf29 2240
4e5ff376
FF		 2241 /*
2242 * When the hardware reports an accurate Tx ACK status, it's
2243 * better to send a nullfunc frame instead of a probe request,
2244 * as it will kick us off the AP quickly if we aren't associated
2245 * anymore. The timeout will be reset if the frame is ACKed by
2246 * the AP.
2247 */
992e68bf
SD		 2248 ifmgd->probe_send_count++;
2249
04ac3c0e
FF		 2250 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2251 ifmgd->nullfunc_failed = false;
4e5ff376 2252 ieee80211_send_nullfunc(sdata->local, sdata, 0);
04ac3c0e 2253 } else {
88c868c4
SG		 2254 int ssid_len;
2255
9caf0364 2256 rcu_read_lock();
4e5ff376 2257 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
88c868c4
SG		 2258 if (WARN_ON_ONCE(ssid == NULL))
2259 ssid_len = 0;
2260 else
2261 ssid_len = ssid[1];
2262
a344d677
JB		 2263 ieee80211_send_probe_req(sdata, sdata->vif.addr, NULL,
2264 ssid + 2, ssid_len, NULL,
1672c0e3 2265 0, (u32) -1, true, 0,
55de908a 2266 ifmgd->associated->channel, false);
9caf0364 2267 rcu_read_unlock();
4e5ff376 2268 }
a43abf29 2269
180205bd 2270 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
8d61ffa5 2271 run_again(sdata, ifmgd->probe_timeout);
a43abf29
ML		 2272}
2273
b291ba11
JB		 2274static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2275 bool beacon)
04de8381 2276{
04de8381 2277 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 2278 bool already = false;
34bfc411 2279
9607e6b6 2280 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 2281 return;
2282
8d61ffa5 2283 sdata_lock(sdata);
77fdaa12
JB		 2284
2285 if (!ifmgd->associated)
2286 goto out;
2287
133d40f9
SG		 2288 mutex_lock(&sdata->local->mtx);
2289
2290 if (sdata->local->tmp_channel || sdata->local->scanning) {
2291 mutex_unlock(&sdata->local->mtx);
2292 goto out;
2293 }
2294
a13fbe54 2295 if (beacon) {
bdcbd8e0 2296 mlme_dbg_ratelimited(sdata,
59c1ec2b
BG		 2297 "detected beacon loss from AP (missed %d beacons) - probing\n",
2298 beacon_loss_count);
bdcbd8e0 2299
98f03342 2300 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
a13fbe54 2301 }
04de8381 2302
b291ba11
JB		 2303 /*
2304 * The driver/our work has already reported this event or the
2305 * connection monitoring has kicked in and we have already sent
2306 * a probe request. Or maybe the AP died and the driver keeps
2307 * reporting until we disassociate...
2308 *
2309 * In either case we have to ignore the current call to this
2310 * function (except for setting the correct probe reason bit)
2311 * because otherwise we would reset the timer every time and
2312 * never check whether we received a probe response!
2313 */
392b9ffb 2314 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
b291ba11
JB		 2315 already = true;
2316
12b5f34d
EP		 2317 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2318
133d40f9
SG		 2319 mutex_unlock(&sdata->local->mtx);
2320
b291ba11
JB		 2321 if (already)
2322 goto out;
2323
4e751843
JB		 2324 mutex_lock(&sdata->local->iflist_mtx);
2325 ieee80211_recalc_ps(sdata->local, -1);
2326 mutex_unlock(&sdata->local->iflist_mtx);
2327
a43abf29
ML		 2328 ifmgd->probe_send_count = 0;
2329 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12 2330 out:
8d61ffa5 2331 sdata_unlock(sdata);
04de8381
KV		 2332}
2333
a619a4c0
JO		 2334struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2335 struct ieee80211_vif *vif)
2336{
2337 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2338 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d9b3b28b 2339 struct cfg80211_bss *cbss;
a619a4c0
JO		 2340 struct sk_buff *skb;
2341 const u8 *ssid;
88c868c4 2342 int ssid_len;
a619a4c0
JO		 2343
2344 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2345 return NULL;
2346
8d61ffa5 2347 sdata_assert_lock(sdata);
a619a4c0 2348
d9b3b28b
EP		 2349 if (ifmgd->associated)
2350 cbss = ifmgd->associated;
2351 else if (ifmgd->auth_data)
2352 cbss = ifmgd->auth_data->bss;
2353 else if (ifmgd->assoc_data)
2354 cbss = ifmgd->assoc_data->bss;
2355 else
a619a4c0
JO		 2356 return NULL;
2357
9caf0364 2358 rcu_read_lock();
d9b3b28b 2359 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
88c868c4
SG		 2360 if (WARN_ON_ONCE(ssid == NULL))
2361 ssid_len = 0;
2362 else
2363 ssid_len = ssid[1];
2364
a344d677 2365 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
55de908a 2366 (u32) -1, cbss->channel,
6b77863b 2367 ssid + 2, ssid_len,
85a237fe 2368 NULL, 0, true);
9caf0364 2369 rcu_read_unlock();
a619a4c0
JO		 2370
2371 return skb;
2372}
2373EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2374
eef9e54c 2375static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
1e4dcd01 2376{
59af6928 2377 struct ieee80211_local *local = sdata->local;
1e4dcd01 2378 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 2379 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
1e4dcd01 2380
8d61ffa5 2381 sdata_lock(sdata);
1e4dcd01 2382 if (!ifmgd->associated) {
8d61ffa5 2383 sdata_unlock(sdata);
1e4dcd01
JO		 2384 return;
2385 }
2386
37ad3888
JB		 2387 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2388 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
eef9e54c 2389 true, frame_buf);
59af6928 2390 mutex_lock(&local->mtx);
7578d575 2391 sdata->vif.csa_active = false;
0c21e632 2392 ifmgd->csa_waiting_bcn = false;
a46992b4
LC		 2393 if (sdata->csa_block_tx) {
2394 ieee80211_wake_vif_queues(local, sdata,
2395 IEEE80211_QUEUE_STOP_REASON_CSA);
2396 sdata->csa_block_tx = false;
2397 }
59af6928 2398 mutex_unlock(&local->mtx);
7da7cc1d 2399
6ff57cf8
JB		 2400 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
2401 IEEE80211_DEAUTH_FRAME_LEN);
8d61ffa5 2402 sdata_unlock(sdata);
1e4dcd01
JO		 2403}
2404
cc74c0c7 2405static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 2406{
2407 struct ieee80211_sub_if_data *sdata =
2408 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 2409 u.mgd.beacon_connection_loss_work);
a85e1d55
PS		 2410 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2411 struct sta_info *sta;
2412
2413 if (ifmgd->associated) {
30fa9047 2414 rcu_read_lock();
a85e1d55
PS		 2415 sta = sta_info_get(sdata, ifmgd->bssid);
2416 if (sta)
2417 sta->beacon_loss_count++;
30fa9047 2418 rcu_read_unlock();
a85e1d55 2419 }
b291ba11 2420
682bd38b 2421 if (ifmgd->connection_loss) {
882a7c69
JB		 2422 sdata_info(sdata, "Connection to AP %pM lost\n",
2423 ifmgd->bssid);
eef9e54c 2424 __ieee80211_disconnect(sdata);
882a7c69 2425 } else {
1e4dcd01 2426 ieee80211_mgd_probe_ap(sdata, true);
882a7c69
JB		 2427 }
2428}
2429
2430static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2431{
2432 struct ieee80211_sub_if_data *sdata =
2433 container_of(work, struct ieee80211_sub_if_data,
2434 u.mgd.csa_connection_drop_work);
2435
eef9e54c 2436 __ieee80211_disconnect(sdata);
b291ba11
JB		 2437}
2438
04de8381
KV		 2439void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2440{
2441 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 2442 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 2443
b5878a2d
JB		 2444 trace_api_beacon_loss(sdata);
2445
682bd38b 2446 sdata->u.mgd.connection_loss = false;
1e4dcd01 2447 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 2448}
2449EXPORT_SYMBOL(ieee80211_beacon_loss);
2450
1e4dcd01
JO		 2451void ieee80211_connection_loss(struct ieee80211_vif *vif)
2452{
2453 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2454 struct ieee80211_hw *hw = &sdata->local->hw;
2455
b5878a2d
JB		 2456 trace_api_connection_loss(sdata);
2457
682bd38b 2458 sdata->u.mgd.connection_loss = true;
1e4dcd01
JO		 2459 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2460}
2461EXPORT_SYMBOL(ieee80211_connection_loss);
2462
2463
66e67e41
JB		 2464static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2465 bool assoc)
2466{
2467 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2468
8d61ffa5 2469 sdata_assert_lock(sdata);
66e67e41 2470
66e67e41 2471 if (!assoc) {
c1e140bf
EG		 2472 /*
2473 * we are not authenticated yet, the only timer that could be
2474 * running is the timeout for the authentication response which
2475 * which is not relevant anymore.
2476 */
2477 del_timer_sync(&sdata->u.mgd.timer);
66e67e41
JB		 2478 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2479
2480 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2481 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
028e8da0 2482 sdata->u.mgd.flags = 0;
34a3740d 2483 mutex_lock(&sdata->local->mtx);
55de908a 2484 ieee80211_vif_release_channel(sdata);
34a3740d 2485 mutex_unlock(&sdata->local->mtx);
66e67e41
JB		 2486 }
2487
5b112d3d 2488 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
66e67e41
JB		 2489 kfree(auth_data);
2490 sdata->u.mgd.auth_data = NULL;
2491}
2492
2493static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2494 struct ieee80211_mgmt *mgmt, size_t len)
2495{
1672c0e3 2496 struct ieee80211_local *local = sdata->local;
66e67e41
JB		 2497 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2498 u8 *pos;
2499 struct ieee802_11_elems elems;
1672c0e3 2500 u32 tx_flags = 0;
66e67e41
JB		 2501
2502 pos = mgmt->u.auth.variable;
b2e506bf 2503 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
66e67e41
JB		 2504 if (!elems.challenge)
2505 return;
2506 auth_data->expected_transaction = 4;
a1845fc7 2507 drv_mgd_prepare_tx(sdata->local, sdata);
1672c0e3
JB		 2508 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2509 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2510 IEEE80211_TX_INTFL_MLME_CONN_TX;
700e8ea6 2511 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
66e67e41
JB		 2512 elems.challenge - 2, elems.challenge_len + 2,
2513 auth_data->bss->bssid, auth_data->bss->bssid,
2514 auth_data->key, auth_data->key_len,
1672c0e3 2515 auth_data->key_idx, tx_flags);
66e67e41
JB		 2516}
2517
8d61ffa5
JB		 2518static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2519 struct ieee80211_mgmt *mgmt, size_t len)
66e67e41
JB		 2520{
2521 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2522 u8 bssid[ETH_ALEN];
2523 u16 auth_alg, auth_transaction, status_code;
2524 struct sta_info *sta;
2525
8d61ffa5 2526 sdata_assert_lock(sdata);
66e67e41
JB		 2527
2528 if (len < 24 + 6)
8d61ffa5 2529 return;
66e67e41
JB		 2530
2531 if (!ifmgd->auth_data || ifmgd->auth_data->done)
8d61ffa5 2532 return;
66e67e41
JB		 2533
2534 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2535
b203ca39 2536 if (!ether_addr_equal(bssid, mgmt->bssid))
8d61ffa5 2537 return;
66e67e41
JB		 2538
2539 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2540 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2541 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2542
2543 if (auth_alg != ifmgd->auth_data->algorithm ||
0f4126e8
JM		 2544 auth_transaction != ifmgd->auth_data->expected_transaction) {
2545 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2546 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2547 auth_transaction,
2548 ifmgd->auth_data->expected_transaction);
8d61ffa5 2549 return;
0f4126e8 2550 }
66e67e41
JB		 2551
2552 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2553 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2554 mgmt->sa, status_code);
dac211ec 2555 ieee80211_destroy_auth_data(sdata, false);
6ff57cf8 2556 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
8d61ffa5 2557 return;
66e67e41
JB		 2558 }
2559
2560 switch (ifmgd->auth_data->algorithm) {
2561 case WLAN_AUTH_OPEN:
2562 case WLAN_AUTH_LEAP:
2563 case WLAN_AUTH_FT:
6b8ece3a 2564 case WLAN_AUTH_SAE:
66e67e41
JB		 2565 break;
2566 case WLAN_AUTH_SHARED_KEY:
2567 if (ifmgd->auth_data->expected_transaction != 4) {
2568 ieee80211_auth_challenge(sdata, mgmt, len);
2569 /* need another frame */
8d61ffa5 2570 return;
66e67e41
JB		 2571 }
2572 break;
2573 default:
2574 WARN_ONCE(1, "invalid auth alg %d",
2575 ifmgd->auth_data->algorithm);
8d61ffa5 2576 return;
66e67e41
JB		 2577 }
2578
bdcbd8e0 2579 sdata_info(sdata, "authenticated\n");
66e67e41
JB		 2580 ifmgd->auth_data->done = true;
2581 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
89afe614 2582 ifmgd->auth_data->timeout_started = true;
8d61ffa5 2583 run_again(sdata, ifmgd->auth_data->timeout);
66e67e41 2584
6b8ece3a
JM		 2585 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2586 ifmgd->auth_data->expected_transaction != 2) {
2587 /*
2588 * Report auth frame to user space for processing since another
2589 * round of Authentication frames is still needed.
2590 */
6ff57cf8 2591 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
8d61ffa5 2592 return;
6b8ece3a
JM		 2593 }
2594
66e67e41
JB		 2595 /* move station state to auth */
2596 mutex_lock(&sdata->local->sta_mtx);
2597 sta = sta_info_get(sdata, bssid);
2598 if (!sta) {
2599 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2600 goto out_err;
2601 }
2602 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
bdcbd8e0 2603 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
66e67e41
JB		 2604 goto out_err;
2605 }
2606 mutex_unlock(&sdata->local->sta_mtx);
2607
6ff57cf8 2608 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
8d61ffa5 2609 return;
66e67e41
JB		 2610 out_err:
2611 mutex_unlock(&sdata->local->sta_mtx);
2612 /* ignore frame -- wait for timeout */
66e67e41
JB		 2613}
2614
dfa1ad29
CO		 2615#define case_WLAN(type) \
2616 case WLAN_REASON_##type: return #type
2617
2618static const char *ieee80211_get_reason_code_string(u16 reason_code)
2619{
2620 switch (reason_code) {
2621 case_WLAN(UNSPECIFIED);
2622 case_WLAN(PREV_AUTH_NOT_VALID);
2623 case_WLAN(DEAUTH_LEAVING);
2624 case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2625 case_WLAN(DISASSOC_AP_BUSY);
2626 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2627 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2628 case_WLAN(DISASSOC_STA_HAS_LEFT);
2629 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2630 case_WLAN(DISASSOC_BAD_POWER);
2631 case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2632 case_WLAN(INVALID_IE);
2633 case_WLAN(MIC_FAILURE);
2634 case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2635 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2636 case_WLAN(IE_DIFFERENT);
2637 case_WLAN(INVALID_GROUP_CIPHER);
2638 case_WLAN(INVALID_PAIRWISE_CIPHER);
2639 case_WLAN(INVALID_AKMP);
2640 case_WLAN(UNSUPP_RSN_VERSION);
2641 case_WLAN(INVALID_RSN_IE_CAP);
2642 case_WLAN(IEEE8021X_FAILED);
2643 case_WLAN(CIPHER_SUITE_REJECTED);
2644 case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2645 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2646 case_WLAN(DISASSOC_LOW_ACK);
2647 case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2648 case_WLAN(QSTA_LEAVE_QBSS);
2649 case_WLAN(QSTA_NOT_USE);
2650 case_WLAN(QSTA_REQUIRE_SETUP);
2651 case_WLAN(QSTA_TIMEOUT);
2652 case_WLAN(QSTA_CIPHER_NOT_SUPP);
2653 case_WLAN(MESH_PEER_CANCELED);
2654 case_WLAN(MESH_MAX_PEERS);
2655 case_WLAN(MESH_CONFIG);
2656 case_WLAN(MESH_CLOSE);
2657 case_WLAN(MESH_MAX_RETRIES);
2658 case_WLAN(MESH_CONFIRM_TIMEOUT);
2659 case_WLAN(MESH_INVALID_GTK);
2660 case_WLAN(MESH_INCONSISTENT_PARAM);
2661 case_WLAN(MESH_INVALID_SECURITY);
2662 case_WLAN(MESH_PATH_ERROR);
2663 case_WLAN(MESH_PATH_NOFORWARD);
2664 case_WLAN(MESH_PATH_DEST_UNREACHABLE);
2665 case_WLAN(MAC_EXISTS_IN_MBSS);
2666 case_WLAN(MESH_CHAN_REGULATORY);
2667 case_WLAN(MESH_CHAN);
2668 default: return "<unknown>";
2669 }
2670}
66e67e41 2671
8d61ffa5
JB		 2672static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2673 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2674{
46900298 2675 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 2676 const u8 *bssid = NULL;
f0706e82
JB		 2677 u16 reason_code;
2678
8d61ffa5 2679 sdata_assert_lock(sdata);
66e67e41 2680
f4ea83dd 2681 if (len < 24 + 2)
8d61ffa5 2682 return;
f0706e82 2683
66e67e41 2684 if (!ifmgd->associated ||
b203ca39 2685 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
8d61ffa5 2686 return;
77fdaa12 2687
0c1ad2ca 2688 bssid = ifmgd->associated->bssid;
f0706e82
JB		 2689
2690 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2691
dfa1ad29
CO		 2692 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
2693 bssid, reason_code, ieee80211_get_reason_code_string(reason_code));
77fdaa12 2694
37ad3888
JB		 2695 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2696
6ff57cf8 2697 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
f0706e82
JB		 2698}
2699
2700
8d61ffa5
JB		 2701static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2702 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2703{
46900298 2704 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 2705 u16 reason_code;
2706
8d61ffa5 2707 sdata_assert_lock(sdata);
77fdaa12 2708
66e67e41 2709 if (len < 24 + 2)
8d61ffa5 2710 return;
77fdaa12 2711
66e67e41 2712 if (!ifmgd->associated ||
b203ca39 2713 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
8d61ffa5 2714 return;
f0706e82
JB		 2715
2716 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2717
bdcbd8e0
JB		 2718 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2719 mgmt->sa, reason_code);
f0706e82 2720
37ad3888
JB		 2721 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2722
6ff57cf8 2723 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
f0706e82
JB		 2724}
2725
c74d084f
CL		 2726static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2727 u8 *supp_rates, unsigned int supp_rates_len,
2728 u32 *rates, u32 *basic_rates,
2729 bool *have_higher_than_11mbit,
2103dec1
SW		 2730 int *min_rate, int *min_rate_index,
2731 int shift, u32 rate_flags)
c74d084f
CL		 2732{
2733 int i, j;
2734
2735 for (i = 0; i < supp_rates_len; i++) {
2103dec1 2736 int rate = supp_rates[i] & 0x7f;
c74d084f
CL		 2737 bool is_basic = !!(supp_rates[i] & 0x80);
2738
2103dec1 2739 if ((rate * 5 * (1 << shift)) > 110)
c74d084f
CL		 2740 *have_higher_than_11mbit = true;
2741
2742 /*
2743 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2744 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2745 *
2746 * Note: Even through the membership selector and the basic
2747 * rate flag share the same bit, they are not exactly
2748 * the same.
2749 */
2750 if (!!(supp_rates[i] & 0x80) &&
2751 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2752 continue;
2753
2754 for (j = 0; j < sband->n_bitrates; j++) {
2103dec1
SW		 2755 struct ieee80211_rate *br;
2756 int brate;
2757
2758 br = &sband->bitrates[j];
2759 if ((rate_flags & br->flags) != rate_flags)
2760 continue;
2761
2762 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2763 if (brate == rate) {
c74d084f
CL		 2764 *rates |= BIT(j);
2765 if (is_basic)
2766 *basic_rates |= BIT(j);
2103dec1
SW		 2767 if ((rate * 5) < *min_rate) {
2768 *min_rate = rate * 5;
c74d084f
CL		 2769 *min_rate_index = j;
2770 }
2771 break;
2772 }
2773 }
2774 }
2775}
f0706e82 2776
66e67e41
JB		 2777static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2778 bool assoc)
2779{
2780 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2781
8d61ffa5 2782 sdata_assert_lock(sdata);
66e67e41 2783
66e67e41 2784 if (!assoc) {
c1e140bf
EG		 2785 /*
2786 * we are not associated yet, the only timer that could be
2787 * running is the timeout for the association response which
2788 * which is not relevant anymore.
2789 */
2790 del_timer_sync(&sdata->u.mgd.timer);
66e67e41
JB		 2791 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2792
2793 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2794 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
028e8da0 2795 sdata->u.mgd.flags = 0;
34a3740d 2796 mutex_lock(&sdata->local->mtx);
55de908a 2797 ieee80211_vif_release_channel(sdata);
34a3740d 2798 mutex_unlock(&sdata->local->mtx);
66e67e41
JB		 2799 }
2800
2801 kfree(assoc_data);
2802 sdata->u.mgd.assoc_data = NULL;
2803}
2804
2805static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2806 struct cfg80211_bss *cbss,
af6b6374 2807 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2808{
46900298 2809 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 2810 struct ieee80211_local *local = sdata->local;
8318d78a 2811 struct ieee80211_supported_band *sband;
f0706e82 2812 struct sta_info *sta;
af6b6374 2813 u8 *pos;
af6b6374 2814 u16 capab_info, aid;
f0706e82 2815 struct ieee802_11_elems elems;
bda3933a 2816 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
35d865af
JB		 2817 const struct cfg80211_bss_ies *bss_ies = NULL;
2818 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
ae5eb026 2819 u32 changed = 0;
c74d084f 2820 int err;
35d865af 2821 bool ret;
f0706e82 2822
af6b6374 2823 /* AssocResp and ReassocResp have identical structure */
f0706e82 2824
f0706e82 2825 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 2826 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 2827
1dd84aa2 2828 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
bdcbd8e0
JB		 2829 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2830 aid);
1dd84aa2
JB		 2831 aid &= ~(BIT(15) | BIT(14));
2832
05cb9108
JB		 2833 ifmgd->broken_ap = false;
2834
2835 if (aid == 0 || aid > IEEE80211_MAX_AID) {
bdcbd8e0
JB		 2836 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2837 aid);
05cb9108
JB		 2838 aid = 0;
2839 ifmgd->broken_ap = true;
2840 }
2841
af6b6374 2842 pos = mgmt->u.assoc_resp.variable;
b2e506bf 2843 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
af6b6374 2844
f0706e82 2845 if (!elems.supp_rates) {
bdcbd8e0 2846 sdata_info(sdata, "no SuppRates element in AssocResp\n");
af6b6374 2847 return false;
f0706e82
JB		 2848 }
2849
46900298 2850 ifmgd->aid = aid;
9041c1fa
AN		 2851 ifmgd->tdls_chan_switch_prohibited =
2852 elems.ext_capab && elems.ext_capab_len >= 5 &&
2853 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
f0706e82 2854
35d865af
JB		 2855 /*
2856 * Some APs are erroneously not including some information in their
2857 * (re)association response frames. Try to recover by using the data
2858 * from the beacon or probe response. This seems to afflict mobile
2859 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2860 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2861 */
2862 if ((assoc_data->wmm && !elems.wmm_param) ||
2863 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2864 (!elems.ht_cap_elem || !elems.ht_operation)) ||
2865 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2866 (!elems.vht_cap_elem || !elems.vht_operation))) {
2867 const struct cfg80211_bss_ies *ies;
2868 struct ieee802_11_elems bss_elems;
2869
2870 rcu_read_lock();
2871 ies = rcu_dereference(cbss->ies);
2872 if (ies)
2873 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2874 GFP_ATOMIC);
2875 rcu_read_unlock();
2876 if (!bss_ies)
2877 return false;
2878
2879 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2880 false, &bss_elems);
2881 if (assoc_data->wmm &&
2882 !elems.wmm_param && bss_elems.wmm_param) {
2883 elems.wmm_param = bss_elems.wmm_param;
2884 sdata_info(sdata,
2885 "AP bug: WMM param missing from AssocResp\n");
2886 }
2887
2888 /*
2889 * Also check if we requested HT/VHT, otherwise the AP doesn't
2890 * have to include the IEs in the (re)association response.
2891 */
2892 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2893 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2894 elems.ht_cap_elem = bss_elems.ht_cap_elem;
2895 sdata_info(sdata,
2896 "AP bug: HT capability missing from AssocResp\n");
2897 }
2898 if (!elems.ht_operation && bss_elems.ht_operation &&
2899 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2900 elems.ht_operation = bss_elems.ht_operation;
2901 sdata_info(sdata,
2902 "AP bug: HT operation missing from AssocResp\n");
2903 }
2904 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2905 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2906 elems.vht_cap_elem = bss_elems.vht_cap_elem;
2907 sdata_info(sdata,
2908 "AP bug: VHT capa missing from AssocResp\n");
2909 }
2910 if (!elems.vht_operation && bss_elems.vht_operation &&
2911 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2912 elems.vht_operation = bss_elems.vht_operation;
2913 sdata_info(sdata,
2914 "AP bug: VHT operation missing from AssocResp\n");
2915 }
2916 }
2917
30eb1dc2
JB		 2918 /*
2919 * We previously checked these in the beacon/probe response, so
2920 * they should be present here. This is just a safety net.
2921 */
2922 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2923 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2924 sdata_info(sdata,
35d865af
JB		 2925 "HT AP is missing WMM params or HT capability/operation\n");
2926 ret = false;
2927 goto out;
30eb1dc2
JB		 2928 }
2929
2930 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2931 (!elems.vht_cap_elem || !elems.vht_operation)) {
2932 sdata_info(sdata,
35d865af
JB		 2933 "VHT AP is missing VHT capability/operation\n");
2934 ret = false;
2935 goto out;
30eb1dc2
JB		 2936 }
2937
2a33bee2
GE		 2938 mutex_lock(&sdata->local->sta_mtx);
2939 /*
2940 * station info was already allocated and inserted before
2941 * the association and should be available to us
2942 */
7852e361 2943 sta = sta_info_get(sdata, cbss->bssid);
2a33bee2
GE		 2944 if (WARN_ON(!sta)) {
2945 mutex_unlock(&sdata->local->sta_mtx);
35d865af
JB		 2946 ret = false;
2947 goto out;
77fdaa12 2948 }
05e5e883 2949
55de908a 2950 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
f709fc69 2951
30eb1dc2 2952 /* Set up internal HT/VHT capabilities */
a8243b72 2953 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
ef96a842 2954 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
e1a0c6b3 2955 elems.ht_cap_elem, sta);
64f68e5d 2956
818255ea
MP		 2957 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2958 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
4a34215e 2959 elems.vht_cap_elem, sta);
818255ea 2960
30eb1dc2
JB		 2961 /*
2962 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
2963 * in their association response, so ignore that data for our own
2964 * configuration. If it changed since the last beacon, we'll get the
2965 * next beacon and update then.
2966 */
1128958d 2967
bee7f586
JB		 2968 /*
2969 * If an operating mode notification IE is present, override the
2970 * NSS calculation (that would be done in rate_control_rate_init())
2971 * and use the # of streams from that element.
2972 */
2973 if (elems.opmode_notif &&
2974 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
2975 u8 nss;
2976
2977 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
2978 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
2979 nss += 1;
2980 sta->sta.rx_nss = nss;
2981 }
2982
4b7679a5 2983 rate_control_rate_init(sta);
f0706e82 2984
46900298 2985 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
c2c98fde 2986 set_sta_flag(sta, WLAN_STA_MFP);
5394af4d 2987
a74a8c84 2988 sta->sta.wme = elems.wmm_param;
ddf4ac53 2989
3e4d40fa 2990 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
c8987876
JB		 2991 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2992 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2993 if (err) {
bdcbd8e0
JB		 2994 sdata_info(sdata,
2995 "failed to move station %pM to desired state\n",
2996 sta->sta.addr);
c8987876
JB		 2997 WARN_ON(__sta_info_destroy(sta));
2998 mutex_unlock(&sdata->local->sta_mtx);
35d865af
JB		 2999 ret = false;
3000 goto out;
c8987876
JB		 3001 }
3002
7852e361 3003 mutex_unlock(&sdata->local->sta_mtx);
ddf4ac53 3004
f2176d72
JO		 3005 /*
3006 * Always handle WMM once after association regardless
3007 * of the first value the AP uses. Setting -1 here has
3008 * that effect because the AP values is an unsigned
3009 * 4-bit value.
3010 */
3011 ifmgd->wmm_last_param_set = -1;
3012
095d81ce 3013 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && elems.wmm_param)
4ced3f74 3014 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 3015 elems.wmm_param_len);
aa837e1d 3016 else
3abead59
JB		 3017 ieee80211_set_wmm_default(sdata, false);
3018 changed |= BSS_CHANGED_QOS;
f0706e82 3019
60f8b39c
JB		 3020 /* set AID and assoc capability,
3021 * ieee80211_set_associated() will tell the driver */
3022 bss_conf->aid = aid;
3023 bss_conf->assoc_capability = capab_info;
0c1ad2ca 3024 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 3025
d524215f
FF		 3026 /*
3027 * If we're using 4-addr mode, let the AP know that we're
3028 * doing so, so that it can create the STA VLAN on its side
3029 */
3030 if (ifmgd->use_4addr)
3031 ieee80211_send_4addr_nullfunc(local, sdata);
3032
15b7b062 3033 /*
b291ba11
JB		 3034 * Start timer to probe the connection to the AP now.
3035 * Also start the timer that will detect beacon loss.
15b7b062 3036 */
b291ba11 3037 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 3038 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 3039
35d865af
JB		 3040 ret = true;
3041 out:
3042 kfree(bss_ies);
3043 return ret;
f0706e82
JB		 3044}
3045
8d61ffa5
JB		 3046static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
3047 struct ieee80211_mgmt *mgmt,
3048 size_t len)
66e67e41
JB		 3049{
3050 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3051 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3052 u16 capab_info, status_code, aid;
3053 struct ieee802_11_elems elems;
b0b6aa2c 3054 int ac, uapsd_queues = -1;
66e67e41
JB		 3055 u8 *pos;
3056 bool reassoc;
8d61ffa5 3057 struct cfg80211_bss *bss;
66e67e41 3058
8d61ffa5 3059 sdata_assert_lock(sdata);
66e67e41
JB		 3060
3061 if (!assoc_data)
8d61ffa5 3062 return;
b203ca39 3063 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
8d61ffa5 3064 return;
66e67e41
JB		 3065
3066 /*
3067 * AssocResp and ReassocResp have identical structure, so process both
3068 * of them in this function.
3069 */
3070
3071 if (len < 24 + 6)
8d61ffa5 3072 return;
66e67e41
JB		 3073
3074 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
3075 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3076 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
3077 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3078
bdcbd8e0
JB		 3079 sdata_info(sdata,
3080 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3081 reassoc ? "Rea" : "A", mgmt->sa,
3082 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
66e67e41
JB		 3083
3084 pos = mgmt->u.assoc_resp.variable;
b2e506bf 3085 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
66e67e41
JB		 3086
3087 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
79ba1d89
JB		 3088 elems.timeout_int &&
3089 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
66e67e41 3090 u32 tu, ms;
79ba1d89 3091 tu = le32_to_cpu(elems.timeout_int->value);
66e67e41 3092 ms = tu * 1024 / 1000;
bdcbd8e0
JB		 3093 sdata_info(sdata,
3094 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3095 mgmt->sa, tu, ms);
66e67e41 3096 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
89afe614 3097 assoc_data->timeout_started = true;
66e67e41 3098 if (ms > IEEE80211_ASSOC_TIMEOUT)
8d61ffa5
JB		 3099 run_again(sdata, assoc_data->timeout);
3100 return;
66e67e41
JB		 3101 }
3102
8d61ffa5 3103 bss = assoc_data->bss;
66e67e41
JB		 3104
3105 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 3106 sdata_info(sdata, "%pM denied association (code=%d)\n",
3107 mgmt->sa, status_code);
66e67e41
JB		 3108 ieee80211_destroy_assoc_data(sdata, false);
3109 } else {
8d61ffa5 3110 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
66e67e41 3111 /* oops -- internal error -- send timeout for now */
10a9109f 3112 ieee80211_destroy_assoc_data(sdata, false);
959867fa 3113 cfg80211_assoc_timeout(sdata->dev, bss);
8d61ffa5 3114 return;
66e67e41 3115 }
635d999f 3116 sdata_info(sdata, "associated\n");
79ebfb85
JB		 3117
3118 /*
3119 * destroy assoc_data afterwards, as otherwise an idle
3120 * recalc after assoc_data is NULL but before associated
3121 * is set can cause the interface to go idle
3122 */
3123 ieee80211_destroy_assoc_data(sdata, true);
b0b6aa2c
EP		 3124
3125 /* get uapsd queues configuration */
3126 uapsd_queues = 0;
3127 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
3128 if (sdata->tx_conf[ac].uapsd)
3129 uapsd_queues |= BIT(ac);
66e67e41
JB		 3130 }
3131
b0b6aa2c 3132 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues);
66e67e41 3133}
8e3c1b77 3134
98c8fccf 3135static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
8e3c1b77 3136 struct ieee80211_mgmt *mgmt, size_t len,
98c8fccf 3137 struct ieee80211_rx_status *rx_status,
d45c4172 3138 struct ieee802_11_elems *elems)
98c8fccf
JB		 3139{
3140 struct ieee80211_local *local = sdata->local;
c2b13452 3141 struct ieee80211_bss *bss;
98c8fccf 3142 struct ieee80211_channel *channel;
56007a02 3143
8d61ffa5 3144 sdata_assert_lock(sdata);
b4f286a1 3145
3afc2167
EG		 3146 channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
3147 if (!channel)
98c8fccf
JB		 3148 return;
3149
98c8fccf 3150 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
d45c4172 3151 channel);
817cee76 3152 if (bss) {
817cee76 3153 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
d2722f8b 3154 ieee80211_rx_bss_put(local, bss);
817cee76 3155 }
f0706e82
JB		 3156}
3157
3158
f698d856 3159static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 3160 struct sk_buff *skb)
f0706e82 3161{
af6b6374 3162 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 3163 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 3164 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
3165 size_t baselen, len = skb->len;
ae6a44e3
EK		 3166 struct ieee802_11_elems elems;
3167
15b7b062
KV		 3168 ifmgd = &sdata->u.mgd;
3169
8d61ffa5 3170 sdata_assert_lock(sdata);
77fdaa12 3171
b203ca39 3172 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
8e7cdbb6
TW		 3173 return; /* ignore ProbeResp to foreign address */
3174
ae6a44e3
EK		 3175 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
3176 if (baselen > len)
3177 return;
3178
3179 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
b2e506bf 3180 false, &elems);
ae6a44e3 3181
d45c4172 3182 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
9859b81e 3183
77fdaa12 3184 if (ifmgd->associated &&
b203ca39 3185 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
4e5ff376 3186 ieee80211_reset_ap_probe(sdata);
66e67e41
JB		 3187
3188 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
b203ca39 3189 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
66e67e41 3190 /* got probe response, continue with auth */
bdcbd8e0 3191 sdata_info(sdata, "direct probe responded\n");
66e67e41
JB		 3192 ifmgd->auth_data->tries = 0;
3193 ifmgd->auth_data->timeout = jiffies;
89afe614 3194 ifmgd->auth_data->timeout_started = true;
8d61ffa5 3195 run_again(sdata, ifmgd->auth_data->timeout);
66e67e41 3196 }
f0706e82
JB		 3197}
3198
d91f36db
JB		 3199/*
3200 * This is the canonical list of information elements we care about,
3201 * the filter code also gives us all changes to the Microsoft OUI
c8d65917
SG		 3202 * (00:50:F2) vendor IE which is used for WMM which we need to track,
3203 * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3204 * changes to requested client power.
d91f36db
JB		 3205 *
3206 * We implement beacon filtering in software since that means we can
3207 * avoid processing the frame here and in cfg80211, and userspace
3208 * will not be able to tell whether the hardware supports it or not.
3209 *
3210 * XXX: This list needs to be dynamic -- userspace needs to be able to
3211 * add items it requires. It also needs to be able to tell us to
3212 * look out for other vendor IEs.
3213 */
3214static const u64 care_about_ies =
1d4df3a5
JB		 3215 (1ULL << WLAN_EID_COUNTRY) |
3216 (1ULL << WLAN_EID_ERP_INFO) |
3217 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
3218 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
3219 (1ULL << WLAN_EID_HT_CAPABILITY) |
70a3fd6c
JB		 3220 (1ULL << WLAN_EID_HT_OPERATION) |
3221 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN);
d91f36db 3222
8d61ffa5
JB		 3223static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
3224 struct ieee80211_mgmt *mgmt, size_t len,
3225 struct ieee80211_rx_status *rx_status)
f0706e82 3226{
d91f36db 3227 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 3228 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 3229 size_t baselen;
3230 struct ieee802_11_elems elems;
f698d856 3231 struct ieee80211_local *local = sdata->local;
55de908a
JB		 3232 struct ieee80211_chanctx_conf *chanctx_conf;
3233 struct ieee80211_channel *chan;
bee7f586 3234 struct sta_info *sta;
471b3efd 3235 u32 changed = 0;
f87ad637 3236 bool erp_valid;
7a5158ef 3237 u8 erp_value = 0;
d91f36db 3238 u32 ncrc;
77fdaa12 3239 u8 *bssid;
8d61ffa5 3240 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
77fdaa12 3241
8d61ffa5 3242 sdata_assert_lock(sdata);
f0706e82 3243
ae6a44e3
EK		 3244 /* Process beacon from the current BSS */
3245 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3246 if (baselen > len)
8d61ffa5 3247 return;
ae6a44e3 3248
55de908a
JB		 3249 rcu_read_lock();
3250 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3251 if (!chanctx_conf) {
3252 rcu_read_unlock();
8d61ffa5 3253 return;
55de908a
JB		 3254 }
3255
4bf88530 3256 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
55de908a 3257 rcu_read_unlock();
8d61ffa5 3258 return;
55de908a 3259 }
4bf88530 3260 chan = chanctx_conf->def.chan;
55de908a 3261 rcu_read_unlock();
f0706e82 3262
c65dd147 3263 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
b203ca39 3264 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
66e67e41 3265 ieee802_11_parse_elems(mgmt->u.beacon.variable,
b2e506bf 3266 len - baselen, false, &elems);
77fdaa12 3267
d45c4172 3268 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
482a9c74
AB		 3269 if (elems.tim && !elems.parse_error) {
3270 const struct ieee80211_tim_ie *tim_ie = elems.tim;
3271 ifmgd->dtim_period = tim_ie->dtim_period;
3272 }
989c6505 3273 ifmgd->have_beacon = true;
c65dd147 3274 ifmgd->assoc_data->need_beacon = false;
ef429dad
JB		 3275 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3276 sdata->vif.bss_conf.sync_tsf =
3277 le64_to_cpu(mgmt->u.beacon.timestamp);
3278 sdata->vif.bss_conf.sync_device_ts =
3279 rx_status->device_timestamp;
3280 if (elems.tim)
3281 sdata->vif.bss_conf.sync_dtim_count =
3282 elems.tim->dtim_count;
3283 else
3284 sdata->vif.bss_conf.sync_dtim_count = 0;
3285 }
66e67e41
JB		 3286 /* continue assoc process */
3287 ifmgd->assoc_data->timeout = jiffies;
89afe614 3288 ifmgd->assoc_data->timeout_started = true;
8d61ffa5
JB		 3289 run_again(sdata, ifmgd->assoc_data->timeout);
3290 return;
66e67e41 3291 }
77fdaa12 3292
66e67e41 3293 if (!ifmgd->associated ||
b203ca39 3294 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
8d61ffa5 3295 return;
66e67e41 3296 bssid = ifmgd->associated->bssid;
f0706e82 3297
17e4ec14
JM		 3298 /* Track average RSSI from the Beacon frames of the current AP */
3299 ifmgd->last_beacon_signal = rx_status->signal;
3300 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3301 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3ba06c6f 3302 ifmgd->ave_beacon_signal = rx_status->signal * 16;
17e4ec14 3303 ifmgd->last_cqm_event_signal = 0;
391a200a 3304 ifmgd->count_beacon_signal = 1;
615f7b9b 3305 ifmgd->last_ave_beacon_signal = 0;
17e4ec14
JM		 3306 } else {
3307 ifmgd->ave_beacon_signal =
3308 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
3309 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
3310 ifmgd->ave_beacon_signal) / 16;
391a200a 3311 ifmgd->count_beacon_signal++;
17e4ec14 3312 }
615f7b9b
MV		 3313
3314 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3315 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3316 int sig = ifmgd->ave_beacon_signal;
3317 int last_sig = ifmgd->last_ave_beacon_signal;
3318
3319 /*
3320 * if signal crosses either of the boundaries, invoke callback
3321 * with appropriate parameters
3322 */
3323 if (sig > ifmgd->rssi_max_thold &&
3324 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3325 ifmgd->last_ave_beacon_signal = sig;
887da917 3326 drv_rssi_callback(local, sdata, RSSI_EVENT_HIGH);
615f7b9b
MV		 3327 } else if (sig < ifmgd->rssi_min_thold &&
3328 (last_sig >= ifmgd->rssi_max_thold ||
3329 last_sig == 0)) {
3330 ifmgd->last_ave_beacon_signal = sig;
887da917 3331 drv_rssi_callback(local, sdata, RSSI_EVENT_LOW);
615f7b9b
MV		 3332 }
3333 }
3334
17e4ec14 3335 if (bss_conf->cqm_rssi_thold &&
391a200a 3336 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
ea086359 3337 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
17e4ec14
JM		 3338 int sig = ifmgd->ave_beacon_signal / 16;
3339 int last_event = ifmgd->last_cqm_event_signal;
3340 int thold = bss_conf->cqm_rssi_thold;
3341 int hyst = bss_conf->cqm_rssi_hyst;
3342 if (sig < thold &&
3343 (last_event == 0 || sig < last_event - hyst)) {
3344 ifmgd->last_cqm_event_signal = sig;
3345 ieee80211_cqm_rssi_notify(
3346 &sdata->vif,
3347 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3348 GFP_KERNEL);
3349 } else if (sig > thold &&
3350 (last_event == 0 || sig > last_event + hyst)) {
3351 ifmgd->last_cqm_event_signal = sig;
3352 ieee80211_cqm_rssi_notify(
3353 &sdata->vif,
3354 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3355 GFP_KERNEL);
3356 }
3357 }
3358
392b9ffb 3359 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
bdcbd8e0 3360 mlme_dbg_ratelimited(sdata,
112c31f0 3361 "cancelling AP probe due to a received beacon\n");
392b9ffb 3362 ieee80211_reset_ap_probe(sdata);
92778180
JM		 3363 }
3364
b291ba11
JB		 3365 /*
3366 * Push the beacon loss detection into the future since
3367 * we are processing a beacon from the AP just now.
3368 */
d3a910a8 3369 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 3370
d91f36db
JB		 3371 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3372 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
b2e506bf 3373 len - baselen, false, &elems,
d91f36db
JB		 3374 care_about_ies, ncrc);
3375
25c9c875 3376 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
f87ad637
RR		 3377 bool directed_tim = ieee80211_check_tim(elems.tim,
3378 elems.tim_len,
3379 ifmgd->aid);
1fb3606b 3380 if (directed_tim) {
572e0012 3381 if (local->hw.conf.dynamic_ps_timeout > 0) {
70b12f26
RW		 3382 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3383 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3384 ieee80211_hw_config(local,
3385 IEEE80211_CONF_CHANGE_PS);
3386 }
572e0012 3387 ieee80211_send_nullfunc(local, sdata, 0);
6f0756a3 3388 } else if (!local->pspolling && sdata->u.mgd.powersave) {
572e0012
KV		 3389 local->pspolling = true;
3390
3391 /*
3392 * Here is assumed that the driver will be
3393 * able to send ps-poll frame and receive a
3394 * response even though power save mode is
3395 * enabled, but some drivers might require
3396 * to disable power save here. This needs
3397 * to be investigated.
3398 */
3399 ieee80211_send_pspoll(local, sdata);
3400 }
a97b77b9
VN		 3401 }
3402 }
7a5158ef 3403
488dd7b5 3404 if (sdata->vif.p2p) {
67baf663 3405 struct ieee80211_p2p_noa_attr noa = {};
488dd7b5
JB		 3406 int ret;
3407
3408 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3409 len - baselen,
3410 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
934457ee 3411 (u8 *) &noa, sizeof(noa));
67baf663
JD		 3412 if (ret >= 2) {
3413 if (sdata->u.mgd.p2p_noa_index != noa.index) {
3414 /* valid noa_attr and index changed */
3415 sdata->u.mgd.p2p_noa_index = noa.index;
3416 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3417 changed |= BSS_CHANGED_P2P_PS;
3418 /*
3419 * make sure we update all information, the CRC
3420 * mechanism doesn't look at P2P attributes.
3421 */
3422 ifmgd->beacon_crc_valid = false;
3423 }
3424 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3425 /* noa_attr not found and we had valid noa_attr before */
3426 sdata->u.mgd.p2p_noa_index = -1;
3427 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
488dd7b5 3428 changed |= BSS_CHANGED_P2P_PS;
488dd7b5
JB		 3429 ifmgd->beacon_crc_valid = false;
3430 }
3431 }
3432
0c21e632
LC		 3433 if (ifmgd->csa_waiting_bcn)
3434 ieee80211_chswitch_post_beacon(sdata);
3435
d8ec4433 3436 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
8d61ffa5 3437 return;
30196673 3438 ifmgd->beacon_crc = ncrc;
d8ec4433 3439 ifmgd->beacon_crc_valid = true;
30196673 3440
d45c4172 3441 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
7d25745d 3442
d70b7616 3443 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
2ba45384 3444 rx_status->device_timestamp,
d70b7616
JB		 3445 &elems, true);
3446
095d81ce
JB		 3447 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3448 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
7d25745d
JB		 3449 elems.wmm_param_len))
3450 changed |= BSS_CHANGED_QOS;
3451
c65dd147
EG		 3452 /*
3453 * If we haven't had a beacon before, tell the driver about the
ef429dad 3454 * DTIM period (and beacon timing if desired) now.
c65dd147 3455 */
989c6505 3456 if (!ifmgd->have_beacon) {
c65dd147
EG		 3457 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3458 if (elems.tim)
3459 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3460 else
3461 bss_conf->dtim_period = 1;
ef429dad
JB		 3462
3463 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3464 sdata->vif.bss_conf.sync_tsf =
3465 le64_to_cpu(mgmt->u.beacon.timestamp);
3466 sdata->vif.bss_conf.sync_device_ts =
3467 rx_status->device_timestamp;
3468 if (elems.tim)
3469 sdata->vif.bss_conf.sync_dtim_count =
3470 elems.tim->dtim_count;
3471 else
3472 sdata->vif.bss_conf.sync_dtim_count = 0;
3473 }
3474
989c6505
AB		 3475 changed |= BSS_CHANGED_BEACON_INFO;
3476 ifmgd->have_beacon = true;
482a9c74
AB		 3477
3478 mutex_lock(&local->iflist_mtx);
3479 ieee80211_recalc_ps(local, -1);
3480 mutex_unlock(&local->iflist_mtx);
3481
ce857888 3482 ieee80211_recalc_ps_vif(sdata);
c65dd147
EG		 3483 }
3484
1946bed9 3485 if (elems.erp_info) {
7a5158ef
JB		 3486 erp_valid = true;
3487 erp_value = elems.erp_info[0];
3488 } else {
3489 erp_valid = false;
50c4afb9 3490 }
7a5158ef
JB		 3491 changed |= ieee80211_handle_bss_capability(sdata,
3492 le16_to_cpu(mgmt->u.beacon.capab_info),
3493 erp_valid, erp_value);
f0706e82 3494
1128958d 3495 mutex_lock(&local->sta_mtx);
bee7f586
JB		 3496 sta = sta_info_get(sdata, bssid);
3497
53b954ee
EP		 3498 if (ieee80211_config_bw(sdata, sta,
3499 elems.ht_cap_elem, elems.ht_operation,
30eb1dc2
JB		 3500 elems.vht_operation, bssid, &changed)) {
3501 mutex_unlock(&local->sta_mtx);
3502 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3503 WLAN_REASON_DEAUTH_LEAVING,
3504 true, deauth_buf);
6ff57cf8
JB		 3505 cfg80211_tx_mlme_mgmt(sdata->dev, deauth_buf,
3506 sizeof(deauth_buf));
8d61ffa5 3507 return;
30eb1dc2 3508 }
bee7f586
JB		 3509
3510 if (sta && elems.opmode_notif)
3511 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3512 rx_status->band, true);
1128958d 3513 mutex_unlock(&local->sta_mtx);
d3c990fb 3514
24a4e400
SG		 3515 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
3516 elems.country_elem,
3517 elems.country_elem_len,
c8d65917
SG		 3518 elems.pwr_constr_elem,
3519 elems.cisco_dtpc_elem);
3f2355cb 3520
471b3efd 3521 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 3522}
3523
1fa57d01
JB		 3524void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3525 struct sk_buff *skb)
f0706e82
JB		 3526{
3527 struct ieee80211_rx_status *rx_status;
f0706e82
JB		 3528 struct ieee80211_mgmt *mgmt;
3529 u16 fc;
1b3a2e49
JB		 3530 struct ieee802_11_elems elems;
3531 int ies_len;
f0706e82 3532
f0706e82
JB		 3533 rx_status = (struct ieee80211_rx_status *) skb->cb;
3534 mgmt = (struct ieee80211_mgmt *) skb->data;
3535 fc = le16_to_cpu(mgmt->frame_control);
3536
8d61ffa5 3537 sdata_lock(sdata);
77fdaa12 3538
66e67e41
JB		 3539 switch (fc & IEEE80211_FCTL_STYPE) {
3540 case IEEE80211_STYPE_BEACON:
8d61ffa5 3541 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
66e67e41
JB		 3542 break;
3543 case IEEE80211_STYPE_PROBE_RESP:
3544 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3545 break;
3546 case IEEE80211_STYPE_AUTH:
8d61ffa5 3547 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
66e67e41
JB		 3548 break;
3549 case IEEE80211_STYPE_DEAUTH:
8d61ffa5 3550 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
66e67e41
JB		 3551 break;
3552 case IEEE80211_STYPE_DISASSOC:
8d61ffa5 3553 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
66e67e41
JB		 3554 break;
3555 case IEEE80211_STYPE_ASSOC_RESP:
3556 case IEEE80211_STYPE_REASSOC_RESP:
8d61ffa5 3557 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
66e67e41
JB		 3558 break;
3559 case IEEE80211_STYPE_ACTION:
37799e52 3560 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
1b3a2e49
JB		 3561 ies_len = skb->len -
3562 offsetof(struct ieee80211_mgmt,
3563 u.action.u.chan_switch.variable);
37799e52
JB		 3564
3565 if (ies_len < 0)
3566 break;
3567
3568 ieee802_11_parse_elems(
3569 mgmt->u.action.u.chan_switch.variable,
b2e506bf 3570 ies_len, true, &elems);
37799e52
JB		 3571
3572 if (elems.parse_error)
3573 break;
3574
1b3a2e49 3575 ieee80211_sta_process_chanswitch(sdata,
2ba45384
LC		 3576 rx_status->mactime,
3577 rx_status->device_timestamp,
3578 &elems, false);
1b3a2e49
JB		 3579 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3580 ies_len = skb->len -
3581 offsetof(struct ieee80211_mgmt,
3582 u.action.u.ext_chan_switch.variable);
3583
3584 if (ies_len < 0)
3585 break;
3586
3587 ieee802_11_parse_elems(
3588 mgmt->u.action.u.ext_chan_switch.variable,
b2e506bf 3589 ies_len, true, &elems);
1b3a2e49
JB		 3590
3591 if (elems.parse_error)
3592 break;
3593
3594 /* for the handling code pretend this was also an IE */
3595 elems.ext_chansw_ie =
3596 &mgmt->u.action.u.ext_chan_switch.data;
3597
66e67e41 3598 ieee80211_sta_process_chanswitch(sdata,
2ba45384
LC		 3599 rx_status->mactime,
3600 rx_status->device_timestamp,
3601 &elems, false);
77fdaa12 3602 }
37799e52 3603 break;
77fdaa12 3604 }
8d61ffa5 3605 sdata_unlock(sdata);
f0706e82
JB		 3606}
3607
9c6bd790 3608static void ieee80211_sta_timer(unsigned long data)
f0706e82 3609{
60f8b39c
JB		 3610 struct ieee80211_sub_if_data *sdata =
3611 (struct ieee80211_sub_if_data *) data;
5bb644a0 3612
9b7d72c1 3613 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
f0706e82
JB		 3614}
3615
04ac3c0e 3616static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
6b684db1 3617 u8 *bssid, u8 reason, bool tx)
04ac3c0e 3618{
6ae16775 3619 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
04ac3c0e 3620
37ad3888 3621 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
6b684db1 3622 tx, frame_buf);
37ad3888 3623
6ff57cf8
JB		 3624 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3625 IEEE80211_DEAUTH_FRAME_LEN);
04ac3c0e
FF		 3626}
3627
66e67e41
JB		 3628static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
3629{
3630 struct ieee80211_local *local = sdata->local;
3631 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3632 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
1672c0e3 3633 u32 tx_flags = 0;
66e67e41 3634
8d61ffa5 3635 sdata_assert_lock(sdata);
66e67e41
JB		 3636
3637 if (WARN_ON_ONCE(!auth_data))
3638 return -EINVAL;
3639
66e67e41
JB		 3640 auth_data->tries++;
3641
3642 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
bdcbd8e0
JB		 3643 sdata_info(sdata, "authentication with %pM timed out\n",
3644 auth_data->bss->bssid);
66e67e41
JB		 3645
3646 /*
3647 * Most likely AP is not in the range so remove the
3648 * bss struct for that AP.
3649 */
3650 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3651
3652 return -ETIMEDOUT;
3653 }
3654
a1845fc7
JB		 3655 drv_mgd_prepare_tx(local, sdata);
3656
66e67e41 3657 if (auth_data->bss->proberesp_ies) {
6b8ece3a
JM		 3658 u16 trans = 1;
3659 u16 status = 0;
3660
bdcbd8e0
JB		 3661 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3662 auth_data->bss->bssid, auth_data->tries,
3663 IEEE80211_AUTH_MAX_TRIES);
66e67e41
JB		 3664
3665 auth_data->expected_transaction = 2;
6b8ece3a
JM		 3666
3667 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3668 trans = auth_data->sae_trans;
3669 status = auth_data->sae_status;
3670 auth_data->expected_transaction = trans;
3671 }
3672
6211dd12
SG		 3673 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3674 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3675 IEEE80211_TX_INTFL_MLME_CONN_TX;
3676
6b8ece3a
JM		 3677 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3678 auth_data->data, auth_data->data_len,
66e67e41 3679 auth_data->bss->bssid,
1672c0e3
JB		 3680 auth_data->bss->bssid, NULL, 0, 0,
3681 tx_flags);
66e67e41
JB		 3682 } else {
3683 const u8 *ssidie;
3684
bdcbd8e0
JB		 3685 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
3686 auth_data->bss->bssid, auth_data->tries,
3687 IEEE80211_AUTH_MAX_TRIES);
66e67e41 3688
9caf0364 3689 rcu_read_lock();
66e67e41 3690 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
9caf0364
JB		 3691 if (!ssidie) {
3692 rcu_read_unlock();
66e67e41 3693 return -EINVAL;
9caf0364 3694 }
66e67e41
JB		 3695 /*
3696 * Direct probe is sent to broadcast address as some APs
3697 * will not answer to direct packet in unassociated state.
3698 */
a344d677
JB		 3699 ieee80211_send_probe_req(sdata, sdata->vif.addr, NULL,
3700 ssidie + 2, ssidie[1],
6211dd12 3701 NULL, 0, (u32) -1, true, 0,
55de908a 3702 auth_data->bss->channel, false);
9caf0364 3703 rcu_read_unlock();
66e67e41
JB		 3704 }
3705
6211dd12 3706 if (tx_flags == 0) {
1672c0e3 3707 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
cb236d2d 3708 auth_data->timeout_started = true;
8d61ffa5 3709 run_again(sdata, auth_data->timeout);
89afe614 3710 } else {
cb236d2d
JB		 3711 auth_data->timeout =
3712 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3713 auth_data->timeout_started = true;
3714 run_again(sdata, auth_data->timeout);
1672c0e3 3715 }
66e67e41
JB		 3716
3717 return 0;
3718}
3719
3720static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3721{
3722 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3723 struct ieee80211_local *local = sdata->local;
3724
8d61ffa5 3725 sdata_assert_lock(sdata);
66e67e41 3726
66e67e41
JB		 3727 assoc_data->tries++;
3728 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
bdcbd8e0
JB		 3729 sdata_info(sdata, "association with %pM timed out\n",
3730 assoc_data->bss->bssid);
66e67e41
JB		 3731
3732 /*
3733 * Most likely AP is not in the range so remove the
3734 * bss struct for that AP.
3735 */
3736 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3737
3738 return -ETIMEDOUT;
3739 }
3740
bdcbd8e0
JB		 3741 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3742 assoc_data->bss->bssid, assoc_data->tries,
3743 IEEE80211_ASSOC_MAX_TRIES);
66e67e41
JB		 3744 ieee80211_send_assoc(sdata);
3745
1672c0e3
JB		 3746 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
3747 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
89afe614 3748 assoc_data->timeout_started = true;
8d61ffa5 3749 run_again(sdata, assoc_data->timeout);
89afe614 3750 } else {
cb236d2d
JB		 3751 assoc_data->timeout =
3752 round_jiffies_up(jiffies +
3753 IEEE80211_ASSOC_TIMEOUT_LONG);
3754 assoc_data->timeout_started = true;
3755 run_again(sdata, assoc_data->timeout);
1672c0e3 3756 }
66e67e41
JB		 3757
3758 return 0;
3759}
3760
1672c0e3
JB		 3761void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3762 __le16 fc, bool acked)
3763{
3764 struct ieee80211_local *local = sdata->local;
3765
3766 sdata->u.mgd.status_fc = fc;
3767 sdata->u.mgd.status_acked = acked;
3768 sdata->u.mgd.status_received = true;
3769
3770 ieee80211_queue_work(&local->hw, &sdata->work);
3771}
3772
1fa57d01 3773void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 3774{
9c6bd790 3775 struct ieee80211_local *local = sdata->local;
1fa57d01 3776 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 3777
8d61ffa5 3778 sdata_lock(sdata);
77fdaa12 3779
1672c0e3
JB		 3780 if (ifmgd->status_received) {
3781 __le16 fc = ifmgd->status_fc;
3782 bool status_acked = ifmgd->status_acked;
3783
3784 ifmgd->status_received = false;
3785 if (ifmgd->auth_data &&
3786 (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) {
3787 if (status_acked) {
3788 ifmgd->auth_data->timeout =
3789 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
8d61ffa5 3790 run_again(sdata, ifmgd->auth_data->timeout);
1672c0e3
JB		 3791 } else {
3792 ifmgd->auth_data->timeout = jiffies - 1;
3793 }
89afe614 3794 ifmgd->auth_data->timeout_started = true;
1672c0e3
JB		 3795 } else if (ifmgd->assoc_data &&
3796 (ieee80211_is_assoc_req(fc) ||
3797 ieee80211_is_reassoc_req(fc))) {
3798 if (status_acked) {
3799 ifmgd->assoc_data->timeout =
3800 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
8d61ffa5 3801 run_again(sdata, ifmgd->assoc_data->timeout);
1672c0e3
JB		 3802 } else {
3803 ifmgd->assoc_data->timeout = jiffies - 1;
3804 }
89afe614 3805 ifmgd->assoc_data->timeout_started = true;
1672c0e3
JB		 3806 }
3807 }
3808
89afe614 3809 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
66e67e41
JB		 3810 time_after(jiffies, ifmgd->auth_data->timeout)) {
3811 if (ifmgd->auth_data->done) {
3812 /*
3813 * ok ... we waited for assoc but userspace didn't,
3814 * so let's just kill the auth data
3815 */
3816 ieee80211_destroy_auth_data(sdata, false);
3817 } else if (ieee80211_probe_auth(sdata)) {
3818 u8 bssid[ETH_ALEN];
3819
3820 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3821
3822 ieee80211_destroy_auth_data(sdata, false);
3823
6ff57cf8 3824 cfg80211_auth_timeout(sdata->dev, bssid);
66e67e41 3825 }
89afe614 3826 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
8d61ffa5 3827 run_again(sdata, ifmgd->auth_data->timeout);
66e67e41 3828
89afe614 3829 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
66e67e41 3830 time_after(jiffies, ifmgd->assoc_data->timeout)) {
989c6505 3831 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
66e67e41 3832 ieee80211_do_assoc(sdata)) {
959867fa 3833 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
66e67e41
JB		 3834
3835 ieee80211_destroy_assoc_data(sdata, false);
959867fa 3836 cfg80211_assoc_timeout(sdata->dev, bss);
66e67e41 3837 }
89afe614 3838 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
8d61ffa5 3839 run_again(sdata, ifmgd->assoc_data->timeout);
66e67e41 3840
392b9ffb 3841 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
b291ba11 3842 ifmgd->associated) {
a43abf29 3843 u8 bssid[ETH_ALEN];
72a8a3ed 3844 int max_tries;
a43abf29 3845
0c1ad2ca 3846 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 3847
72a8a3ed 3848 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
180205bd 3849 max_tries = max_nullfunc_tries;
72a8a3ed 3850 else
180205bd 3851 max_tries = max_probe_tries;
72a8a3ed 3852
4e5ff376
FF		 3853 /* ACK received for nullfunc probing frame */
3854 if (!ifmgd->probe_send_count)
3855 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 3856 else if (ifmgd->nullfunc_failed) {
3857 if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3858 mlme_dbg(sdata,
3859 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3860 bssid, ifmgd->probe_send_count,
3861 max_tries);
04ac3c0e
FF		 3862 ieee80211_mgd_probe_ap_send(sdata);
3863 } else {
bdcbd8e0
JB		 3864 mlme_dbg(sdata,
3865 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3866 bssid);
95acac61 3867 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1
JB		 3868 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3869 false);
04ac3c0e
FF		 3870 }
3871 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
8d61ffa5 3872 run_again(sdata, ifmgd->probe_timeout);
04ac3c0e 3873 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
bdcbd8e0
JB		 3874 mlme_dbg(sdata,
3875 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3876 bssid, probe_wait_ms);
95acac61 3877 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 3878 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
04ac3c0e 3879 } else if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3880 mlme_dbg(sdata,
3881 "No probe response from AP %pM after %dms, try %d/%i\n",
3882 bssid, probe_wait_ms,
3883 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 3884 ieee80211_mgd_probe_ap_send(sdata);
3885 } else {
b291ba11
JB		 3886 /*
3887 * We actually lost the connection ... or did we?
3888 * Let's make sure!
3889 */
b38afa87
BG		 3890 wiphy_debug(local->hw.wiphy,
3891 "%s: No probe response from AP %pM"
3892 " after %dms, disconnecting.\n",
3893 sdata->name,
180205bd 3894 bssid, probe_wait_ms);
04ac3c0e 3895
95acac61 3896 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 3897 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
b291ba11
JB		 3898 }
3899 }
3900
8d61ffa5 3901 sdata_unlock(sdata);
f0706e82
JB		 3902}
3903
b291ba11
JB		 3904static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3905{
3906 struct ieee80211_sub_if_data *sdata =
3907 (struct ieee80211_sub_if_data *) data;
3908 struct ieee80211_local *local = sdata->local;
0c21e632 3909 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11
JB		 3910
3911 if (local->quiescing)
3912 return;
3913
0c21e632 3914 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
e5593f56
MK		 3915 return;
3916
682bd38b 3917 sdata->u.mgd.connection_loss = false;
1e4dcd01
JO		 3918 ieee80211_queue_work(&sdata->local->hw,
3919 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 3920}
3921
3922static void ieee80211_sta_conn_mon_timer(unsigned long data)
3923{
3924 struct ieee80211_sub_if_data *sdata =
3925 (struct ieee80211_sub_if_data *) data;
3926 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3927 struct ieee80211_local *local = sdata->local;
3928
3929 if (local->quiescing)
3930 return;
3931
0c21e632 3932 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
e5593f56
MK		 3933 return;
3934
42935eca 3935 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 3936}
3937
3938static void ieee80211_sta_monitor_work(struct work_struct *work)
3939{
3940 struct ieee80211_sub_if_data *sdata =
3941 container_of(work, struct ieee80211_sub_if_data,
3942 u.mgd.monitor_work);
3943
3944 ieee80211_mgd_probe_ap(sdata, false);
3945}
3946
9c6bd790
JB		 3947static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3948{
494f1fe5
EP		 3949 u32 flags;
3950
ad935687 3951 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
925e64c3 3952 __ieee80211_stop_poll(sdata);
ad935687 3953
b291ba11 3954 /* let's probe the connection once */
494f1fe5
EP		 3955 flags = sdata->local->hw.flags;
3956 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3957 ieee80211_queue_work(&sdata->local->hw,
3958 &sdata->u.mgd.monitor_work);
b291ba11 3959 /* and do all the other regular work too */
64592c8f 3960 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 3961 }
9c6bd790 3962}
f0706e82 3963
b8360ab8 3964#ifdef CONFIG_PM
1a1cb744
JB		 3965void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
3966{
3967 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3968 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3969
3970 sdata_lock(sdata);
3971
c52666ae
EG		 3972 if (ifmgd->auth_data || ifmgd->assoc_data) {
3973 const u8 *bssid = ifmgd->auth_data ?
3974 ifmgd->auth_data->bss->bssid :
3975 ifmgd->assoc_data->bss->bssid;
3976
1a1cb744 3977 /*
c52666ae
EG		 3978 * If we are trying to authenticate / associate while suspending,
3979 * cfg80211 won't know and won't actually abort those attempts,
3980 * thus we need to do that ourselves.
1a1cb744 3981 */
c52666ae 3982 ieee80211_send_deauth_disassoc(sdata, bssid,
1a1cb744
JB		 3983 IEEE80211_STYPE_DEAUTH,
3984 WLAN_REASON_DEAUTH_LEAVING,
3985 false, frame_buf);
c52666ae
EG		 3986 if (ifmgd->assoc_data)
3987 ieee80211_destroy_assoc_data(sdata, false);
3988 if (ifmgd->auth_data)
3989 ieee80211_destroy_auth_data(sdata, false);
1a1cb744
JB		 3990 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3991 IEEE80211_DEAUTH_FRAME_LEN);
3992 }
3993
3994 sdata_unlock(sdata);
3995}
3996
b8360ab8
JB		 3997void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
3998{
3999 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4000
8d61ffa5 4001 sdata_lock(sdata);
b8360ab8 4002 if (!ifmgd->associated) {
8d61ffa5 4003 sdata_unlock(sdata);
b8360ab8
JB		 4004 return;
4005 }
4006
4007 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
4008 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
4009 mlme_dbg(sdata, "driver requested disconnect after resume\n");
4010 ieee80211_sta_connection_lost(sdata,
4011 ifmgd->associated->bssid,
4012 WLAN_REASON_UNSPECIFIED,
4013 true);
8d61ffa5 4014 sdata_unlock(sdata);
b8360ab8
JB		 4015 return;
4016 }
8d61ffa5 4017 sdata_unlock(sdata);
b8360ab8
JB		 4018}
4019#endif
4020
9c6bd790
JB		 4021/* interface setup */
4022void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 4023{
46900298 4024 struct ieee80211_if_managed *ifmgd;
988c0f72 4025
46900298 4026 ifmgd = &sdata->u.mgd;
b291ba11 4027 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 4028 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 4029 INIT_WORK(&ifmgd->beacon_connection_loss_work,
4030 ieee80211_beacon_connection_loss_work);
882a7c69
JB		 4031 INIT_WORK(&ifmgd->csa_connection_drop_work,
4032 ieee80211_csa_connection_drop_work);
687da132 4033 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
81dd2b88
AN		 4034 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
4035 ieee80211_tdls_peer_del_work);
46900298 4036 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 4037 (unsigned long) sdata);
b291ba11
JB		 4038 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
4039 (unsigned long) sdata);
4040 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
4041 (unsigned long) sdata);
46900298 4042 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 4043 (unsigned long) sdata);
02219b3a
JB		 4044 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
4045 ieee80211_sta_handle_tspec_ac_params_wk);
9c6bd790 4046
ab1faead 4047 ifmgd->flags = 0;
1478acb3 4048 ifmgd->powersave = sdata->wdev.ps;
219c3867
AB		 4049 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
4050 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
67baf663 4051 ifmgd->p2p_noa_index = -1;
bbbdff9e 4052
0d8614b4 4053 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
0f78231b
JB		 4054 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
4055 else
4056 ifmgd->req_smps = IEEE80211_SMPS_OFF;
1277b4a9
LK		 4057
4058 /* Setup TDLS data */
4059 spin_lock_init(&ifmgd->teardown_lock);
4060 ifmgd->teardown_skb = NULL;
4061 ifmgd->orig_teardown_skb = NULL;
f0706e82
JB		 4062}
4063
77fdaa12
JB		 4064/* scan finished notification */
4065void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 4066{
31ee67a1 4067 struct ieee80211_sub_if_data *sdata;
60f8b39c 4068
77fdaa12
JB		 4069 /* Restart STA timers */
4070 rcu_read_lock();
370bd005
BG		 4071 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4072 if (ieee80211_sdata_running(sdata))
4073 ieee80211_restart_sta_timer(sdata);
4074 }
77fdaa12
JB		 4075 rcu_read_unlock();
4076}
60f8b39c 4077
77fdaa12
JB		 4078int ieee80211_max_network_latency(struct notifier_block *nb,
4079 unsigned long data, void *dummy)
4080{
4081 s32 latency_usec = (s32) data;
4082 struct ieee80211_local *local =
4083 container_of(nb, struct ieee80211_local,
4084 network_latency_notifier);
1fa6f4af 4085
77fdaa12
JB		 4086 mutex_lock(&local->iflist_mtx);
4087 ieee80211_recalc_ps(local, latency_usec);
4088 mutex_unlock(&local->iflist_mtx);
dfe67012 4089
8bd811aa 4090 return NOTIFY_OK;
9c6bd790
JB		 4091}
4092
f2d9d270
JB		 4093static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
4094 struct cfg80211_bss *cbss)
4095{
4096 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4097 const u8 *ht_cap_ie, *vht_cap_ie;
4098 const struct ieee80211_ht_cap *ht_cap;
4099 const struct ieee80211_vht_cap *vht_cap;
4100 u8 chains = 1;
4101
4102 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
4103 return chains;
4104
9caf0364 4105 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
f2d9d270
JB		 4106 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
4107 ht_cap = (void *)(ht_cap_ie + 2);
4108 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4109 /*
4110 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4111 * "Tx Unequal Modulation Supported" fields.
4112 */
4113 }
4114
4115 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
4116 return chains;
4117
9caf0364 4118 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
f2d9d270
JB		 4119 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
4120 u8 nss;
4121 u16 tx_mcs_map;
4122
4123 vht_cap = (void *)(vht_cap_ie + 2);
4124 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4125 for (nss = 8; nss > 0; nss--) {
4126 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4127 IEEE80211_VHT_MCS_NOT_SUPPORTED)
4128 break;
4129 }
4130 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4131 chains = max(chains, nss);
4132 }
4133
4134 return chains;
4135}
4136
b17166a7
JB		 4137static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4138 struct cfg80211_bss *cbss)
a1cf775d
JB		 4139{
4140 struct ieee80211_local *local = sdata->local;
4141 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
53b954ee 4142 const struct ieee80211_ht_cap *ht_cap = NULL;
24398e39 4143 const struct ieee80211_ht_operation *ht_oper = NULL;
f2d9d270 4144 const struct ieee80211_vht_operation *vht_oper = NULL;
24398e39 4145 struct ieee80211_supported_band *sband;
4bf88530 4146 struct cfg80211_chan_def chandef;
f2d9d270 4147 int ret;
a1cf775d 4148
24398e39
JB		 4149 sband = local->hw.wiphy->bands[cbss->channel->band];
4150
f2d9d270
JB		 4151 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
4152 IEEE80211_STA_DISABLE_80P80MHZ |
4153 IEEE80211_STA_DISABLE_160MHZ);
4154
9caf0364
JB		 4155 rcu_read_lock();
4156
f2d9d270
JB		 4157 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
4158 sband->ht_cap.ht_supported) {
53b954ee 4159 const u8 *ht_oper_ie, *ht_cap_ie;
24398e39 4160
9caf0364 4161 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
24398e39
JB		 4162 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
4163 ht_oper = (void *)(ht_oper_ie + 2);
08e6effa 4164
53b954ee
EP		 4165 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4166 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
4167 ht_cap = (void *)(ht_cap_ie + 2);
4168
4169 if (!ht_cap) {
08e6effa
JB		 4170 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4171 ht_oper = NULL;
4172 }
24398e39
JB		 4173 }
4174
f2d9d270
JB		 4175 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4176 sband->vht_cap.vht_supported) {
08e6effa 4177 const u8 *vht_oper_ie, *vht_cap;
f2d9d270 4178
9caf0364
JB		 4179 vht_oper_ie = ieee80211_bss_get_ie(cbss,
4180 WLAN_EID_VHT_OPERATION);
f2d9d270
JB		 4181 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
4182 vht_oper = (void *)(vht_oper_ie + 2);
4183 if (vht_oper && !ht_oper) {
4184 vht_oper = NULL;
bdcbd8e0 4185 sdata_info(sdata,
f2d9d270 4186 "AP advertised VHT without HT, disabling both\n");
cb145022
JB		 4187 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4188 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
24398e39 4189 }
08e6effa
JB		 4190
4191 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4192 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
4193 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4194 vht_oper = NULL;
4195 }
24398e39
JB		 4196 }
4197
f2d9d270
JB		 4198 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
4199 cbss->channel,
53b954ee 4200 ht_cap, ht_oper, vht_oper,
5cdaed1e 4201 &chandef, false);
04ecd257 4202
f2d9d270
JB		 4203 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
4204 local->rx_chains);
24398e39 4205
9caf0364
JB		 4206 rcu_read_unlock();
4207
04ecd257
JB		 4208 /* will change later if needed */
4209 sdata->smps_mode = IEEE80211_SMPS_OFF;
4210
34a3740d 4211 mutex_lock(&local->mtx);
f2d9d270
JB		 4212 /*
4213 * If this fails (possibly due to channel context sharing
4214 * on incompatible channels, e.g. 80+80 and 160 sharing the
4215 * same control channel) try to use a smaller bandwidth.
4216 */
4217 ret = ieee80211_vif_use_channel(sdata, &chandef,
4218 IEEE80211_CHANCTX_SHARED);
0418a445
SW		 4219
4220 /* don't downgrade for 5 and 10 MHz channels, though. */
4221 if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4222 chandef.width == NL80211_CHAN_WIDTH_10)
34a3740d 4223 goto out;
0418a445 4224
d601cd8d 4225 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
e6b7cde4 4226 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
d601cd8d
JB		 4227 ret = ieee80211_vif_use_channel(sdata, &chandef,
4228 IEEE80211_CHANCTX_SHARED);
4229 }
34a3740d
JB		 4230 out:
4231 mutex_unlock(&local->mtx);
f2d9d270 4232 return ret;
b17166a7
JB		 4233}
4234
4235static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
4236 struct cfg80211_bss *cbss, bool assoc)
4237{
4238 struct ieee80211_local *local = sdata->local;
4239 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4240 struct ieee80211_bss *bss = (void *)cbss->priv;
4241 struct sta_info *new_sta = NULL;
179b8fc7
CRI		 4242 struct ieee80211_supported_band *sband;
4243 struct ieee80211_sta_ht_cap sta_ht_cap;
4244 bool have_sta = false, is_override = false;
b17166a7
JB		 4245 int err;
4246
179b8fc7
CRI		 4247 sband = local->hw.wiphy->bands[cbss->channel->band];
4248
b17166a7
JB		 4249 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
4250 return -EINVAL;
4251
4252 if (assoc) {
4253 rcu_read_lock();
4254 have_sta = sta_info_get(sdata, cbss->bssid);
4255 rcu_read_unlock();
4256 }
4257
4258 if (!have_sta) {
4259 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4260 if (!new_sta)
4261 return -ENOMEM;
4262 }
179b8fc7
CRI		 4263
4264 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
4265 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
4266
4267 is_override = (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) !=
4268 (sband->ht_cap.cap &
4269 IEEE80211_HT_CAP_SUP_WIDTH_20_40);
4270
4271 if (new_sta || is_override) {
4272 err = ieee80211_prep_channel(sdata, cbss);
4273 if (err) {
4274 if (new_sta)
4275 sta_info_free(local, new_sta);
4276 return -EINVAL;
4277 }
4278 }
4279
13e0c8e3 4280 if (new_sta) {
5d6a1b06
JB		 4281 u32 rates = 0, basic_rates = 0;
4282 bool have_higher_than_11mbit;
4283 int min_rate = INT_MAX, min_rate_index = -1;
2103dec1 4284 struct ieee80211_chanctx_conf *chanctx_conf;
8cef2c9d 4285 const struct cfg80211_bss_ies *ies;
179b8fc7 4286 int shift = ieee80211_vif_get_shift(&sdata->vif);
2103dec1 4287 u32 rate_flags;
b17166a7 4288
2103dec1
SW		 4289 rcu_read_lock();
4290 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4291 if (WARN_ON(!chanctx_conf)) {
4292 rcu_read_unlock();
c368ddaa 4293 sta_info_free(local, new_sta);
2103dec1
SW		 4294 return -EINVAL;
4295 }
4296 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
4297 rcu_read_unlock();
5d6a1b06 4298
5d6a1b06
JB		 4299 ieee80211_get_rates(sband, bss->supp_rates,
4300 bss->supp_rates_len,
4301 &rates, &basic_rates,
4302 &have_higher_than_11mbit,
2103dec1
SW		 4303 &min_rate, &min_rate_index,
4304 shift, rate_flags);
5d6a1b06
JB		 4305
4306 /*
4307 * This used to be a workaround for basic rates missing
4308 * in the association response frame. Now that we no
4309 * longer use the basic rates from there, it probably
4310 * doesn't happen any more, but keep the workaround so
4311 * in case some *other* APs are buggy in different ways
4312 * we can connect -- with a warning.
4313 */
4314 if (!basic_rates && min_rate_index >= 0) {
bdcbd8e0
JB		 4315 sdata_info(sdata,
4316 "No basic rates, using min rate instead\n");
5d6a1b06
JB		 4317 basic_rates = BIT(min_rate_index);
4318 }
4319
13e0c8e3 4320 new_sta->sta.supp_rates[cbss->channel->band] = rates;
5d6a1b06
JB		 4321 sdata->vif.bss_conf.basic_rates = basic_rates;
4322
4323 /* cf. IEEE 802.11 9.2.12 */
55de908a 4324 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
5d6a1b06
JB		 4325 have_higher_than_11mbit)
4326 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
4327 else
4328 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
4329
4330 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
4331
8c358bcd
JB		 4332 /* set timing information */
4333 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
8cef2c9d 4334 rcu_read_lock();
ef429dad
JB		 4335 ies = rcu_dereference(cbss->beacon_ies);
4336 if (ies) {
4337 const u8 *tim_ie;
4338
4339 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4340 sdata->vif.bss_conf.sync_device_ts =
4341 bss->device_ts_beacon;
4342 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4343 ies->data, ies->len);
4344 if (tim_ie && tim_ie[1] >= 2)
4345 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
4346 else
4347 sdata->vif.bss_conf.sync_dtim_count = 0;
4348 } else if (!(local->hw.flags &
4349 IEEE80211_HW_TIMING_BEACON_ONLY)) {
4350 ies = rcu_dereference(cbss->proberesp_ies);
4351 /* must be non-NULL since beacon IEs were NULL */
4352 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4353 sdata->vif.bss_conf.sync_device_ts =
4354 bss->device_ts_presp;
4355 sdata->vif.bss_conf.sync_dtim_count = 0;
4356 } else {
4357 sdata->vif.bss_conf.sync_tsf = 0;
4358 sdata->vif.bss_conf.sync_device_ts = 0;
4359 sdata->vif.bss_conf.sync_dtim_count = 0;
4360 }
8cef2c9d 4361 rcu_read_unlock();
8c358bcd
JB		 4362
4363 /* tell driver about BSSID, basic rates and timing */
5d6a1b06 4364 ieee80211_bss_info_change_notify(sdata,
8c358bcd
JB		 4365 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4366 BSS_CHANGED_BEACON_INT);
a1cf775d
JB		 4367
4368 if (assoc)
13e0c8e3 4369 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
a1cf775d 4370
13e0c8e3
JB		 4371 err = sta_info_insert(new_sta);
4372 new_sta = NULL;
a1cf775d 4373 if (err) {
bdcbd8e0
JB		 4374 sdata_info(sdata,
4375 "failed to insert STA entry for the AP (error %d)\n",
4376 err);
a1cf775d
JB		 4377 return err;
4378 }
4379 } else
b203ca39 4380 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
a1cf775d
JB		 4381
4382 return 0;
4383}
4384
77fdaa12
JB		 4385/* config hooks */
4386int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4387 struct cfg80211_auth_request *req)
9c6bd790 4388{
66e67e41
JB		 4389 struct ieee80211_local *local = sdata->local;
4390 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4391 struct ieee80211_mgd_auth_data *auth_data;
77fdaa12 4392 u16 auth_alg;
66e67e41
JB		 4393 int err;
4394
4395 /* prepare auth data structure */
9c6bd790 4396
77fdaa12
JB		 4397 switch (req->auth_type) {
4398 case NL80211_AUTHTYPE_OPEN_SYSTEM:
4399 auth_alg = WLAN_AUTH_OPEN;
4400 break;
4401 case NL80211_AUTHTYPE_SHARED_KEY:
66e67e41 4402 if (IS_ERR(local->wep_tx_tfm))
9dca9c49 4403 return -EOPNOTSUPP;
77fdaa12
JB		 4404 auth_alg = WLAN_AUTH_SHARED_KEY;
4405 break;
4406 case NL80211_AUTHTYPE_FT:
4407 auth_alg = WLAN_AUTH_FT;
4408 break;
4409 case NL80211_AUTHTYPE_NETWORK_EAP:
4410 auth_alg = WLAN_AUTH_LEAP;
4411 break;
6b8ece3a
JM		 4412 case NL80211_AUTHTYPE_SAE:
4413 auth_alg = WLAN_AUTH_SAE;
4414 break;
77fdaa12
JB		 4415 default:
4416 return -EOPNOTSUPP;
60f8b39c 4417 }
77fdaa12 4418
6b8ece3a
JM		 4419 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
4420 req->ie_len, GFP_KERNEL);
66e67e41 4421 if (!auth_data)
9c6bd790 4422 return -ENOMEM;
77fdaa12 4423
66e67e41 4424 auth_data->bss = req->bss;
77fdaa12 4425
6b8ece3a
JM		 4426 if (req->sae_data_len >= 4) {
4427 __le16 *pos = (__le16 *) req->sae_data;
4428 auth_data->sae_trans = le16_to_cpu(pos[0]);
4429 auth_data->sae_status = le16_to_cpu(pos[1]);
4430 memcpy(auth_data->data, req->sae_data + 4,
4431 req->sae_data_len - 4);
4432 auth_data->data_len += req->sae_data_len - 4;
4433 }
4434
77fdaa12 4435 if (req->ie && req->ie_len) {
6b8ece3a
JM		 4436 memcpy(&auth_data->data[auth_data->data_len],
4437 req->ie, req->ie_len);
4438 auth_data->data_len += req->ie_len;
9c6bd790 4439 }
77fdaa12 4440
fffd0934 4441 if (req->key && req->key_len) {
66e67e41
JB		 4442 auth_data->key_len = req->key_len;
4443 auth_data->key_idx = req->key_idx;
4444 memcpy(auth_data->key, req->key, req->key_len);
fffd0934
JB		 4445 }
4446
66e67e41 4447 auth_data->algorithm = auth_alg;
60f8b39c 4448
66e67e41 4449 /* try to authenticate/probe */
2a33bee2 4450
66e67e41
JB		 4451 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4452 ifmgd->assoc_data) {
4453 err = -EBUSY;
4454 goto err_free;
2a33bee2
GE		 4455 }
4456
66e67e41
JB		 4457 if (ifmgd->auth_data)
4458 ieee80211_destroy_auth_data(sdata, false);
2a33bee2 4459
66e67e41
JB		 4460 /* prep auth_data so we don't go into idle on disassoc */
4461 ifmgd->auth_data = auth_data;
af6b6374 4462
7b119dc0
JB		 4463 if (ifmgd->associated) {
4464 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4465
4466 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4467 WLAN_REASON_UNSPECIFIED,
4468 false, frame_buf);
4469
6ff57cf8
JB		 4470 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4471 sizeof(frame_buf));
7b119dc0 4472 }
af6b6374 4473
bdcbd8e0 4474 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
e5b900d2 4475
a1cf775d
JB		 4476 err = ieee80211_prep_connection(sdata, req->bss, false);
4477 if (err)
66e67e41 4478 goto err_clear;
af6b6374 4479
66e67e41
JB		 4480 err = ieee80211_probe_auth(sdata);
4481 if (err) {
66e67e41
JB		 4482 sta_info_destroy_addr(sdata, req->bss->bssid);
4483 goto err_clear;
4484 }
4485
4486 /* hold our own reference */
5b112d3d 4487 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
8d61ffa5 4488 return 0;
66e67e41
JB		 4489
4490 err_clear:
3d2abdfd
EP		 4491 memset(ifmgd->bssid, 0, ETH_ALEN);
4492 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 4493 ifmgd->auth_data = NULL;
4494 err_free:
4495 kfree(auth_data);
66e67e41 4496 return err;
af6b6374
JB		 4497}
4498
095d81ce
JB		 4499static bool ieee80211_usable_wmm_params(struct ieee80211_sub_if_data *sdata,
4500 const u8 *wmm_param, int len)
4501{
4502 const u8 *pos;
4503 size_t left;
4504
4505 if (len < 8)
4506 return false;
4507
4508 if (wmm_param[5] != 1 /* version */)
4509 return false;
4510
4511 pos = wmm_param + 8;
4512 left = len - 8;
4513
4514 for (; left >= 4; left -= 4, pos += 4) {
4515 u8 aifsn = pos[0] & 0x0f;
4516 u8 ecwmin = pos[1] & 0x0f;
4517 u8 ecwmax = (pos[1] & 0xf0) >> 4;
4518 int aci = (pos[0] >> 5) & 0x03;
4519
4520 if (aifsn < 2) {
4521 sdata_info(sdata,
4522 "AP has invalid WMM params (AIFSN=%d for ACI %d), disabling WMM\n",
4523 aifsn, aci);
4524 return false;
4525 }
4526 if (ecwmin > ecwmax) {
4527 sdata_info(sdata,
4528 "AP has invalid WMM params (ECWmin/max=%d/%d for ACI %d), disabling WMM\n",
4529 ecwmin, ecwmax, aci);
4530 return false;
4531 }
4532 }
4533
4534 return true;
4535}
4536
77fdaa12
JB		 4537int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4538 struct cfg80211_assoc_request *req)
f0706e82 4539{
66e67e41 4540 struct ieee80211_local *local = sdata->local;
77fdaa12 4541 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 4542 struct ieee80211_bss *bss = (void *)req->bss->priv;
66e67e41 4543 struct ieee80211_mgd_assoc_data *assoc_data;
c65dd147 4544 const struct cfg80211_bss_ies *beacon_ies;
4e74bfdb 4545 struct ieee80211_supported_band *sband;
b08fbbd8 4546 const u8 *ssidie, *ht_ie, *vht_ie;
2a33bee2 4547 int i, err;
f0706e82 4548
66e67e41
JB		 4549 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4550 if (!assoc_data)
4551 return -ENOMEM;
4552
9caf0364
JB		 4553 rcu_read_lock();
4554 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4555 if (!ssidie) {
4556 rcu_read_unlock();
4557 kfree(assoc_data);
4558 return -EINVAL;
4559 }
4560 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4561 assoc_data->ssid_len = ssidie[1];
4562 rcu_read_unlock();
4563
7b119dc0
JB		 4564 if (ifmgd->associated) {
4565 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4566
4567 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4568 WLAN_REASON_UNSPECIFIED,
4569 false, frame_buf);
4570
6ff57cf8
JB		 4571 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4572 sizeof(frame_buf));
7b119dc0 4573 }
66e67e41
JB		 4574
4575 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4576 err = -EBUSY;
4577 goto err_free;
af6b6374 4578 }
77fdaa12 4579
66e67e41
JB		 4580 if (ifmgd->assoc_data) {
4581 err = -EBUSY;
4582 goto err_free;
4583 }
77fdaa12 4584
66e67e41
JB		 4585 if (ifmgd->auth_data) {
4586 bool match;
4587
4588 /* keep sta info, bssid if matching */
b203ca39 4589 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
66e67e41 4590 ieee80211_destroy_auth_data(sdata, match);
2a33bee2
GE		 4591 }
4592
66e67e41 4593 /* prepare assoc data */
095d81ce 4594
d8ec4433
JO		 4595 ifmgd->beacon_crc_valid = false;
4596
095d81ce
JB		 4597 assoc_data->wmm = bss->wmm_used &&
4598 (local->hw.queues >= IEEE80211_NUM_ACS);
4599 if (assoc_data->wmm) {
4600 /* try to check validity of WMM params IE */
4601 const struct cfg80211_bss_ies *ies;
4602 const u8 *wp, *start, *end;
4603
4604 rcu_read_lock();
4605 ies = rcu_dereference(req->bss->ies);
4606 start = ies->data;
4607 end = start + ies->len;
4608
4609 while (true) {
4610 wp = cfg80211_find_vendor_ie(
4611 WLAN_OUI_MICROSOFT,
4612 WLAN_OUI_TYPE_MICROSOFT_WMM,
4613 start, end - start);
4614 if (!wp)
4615 break;
4616 start = wp + wp[1] + 2;
4617 /* if this IE is too short, try the next */
4618 if (wp[1] <= 4)
4619 continue;
4620 /* if this IE is WMM params, we found what we wanted */
4621 if (wp[6] == 1)
4622 break;
4623 }
4624
4625 if (!wp || !ieee80211_usable_wmm_params(sdata, wp + 2,
4626 wp[1] - 2)) {
4627 assoc_data->wmm = false;
4628 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
4629 }
4630 rcu_read_unlock();
4631 }
4632
de5036aa
JB		 4633 /*
4634 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4635 * We still associate in non-HT mode (11a/b/g) if any one of these
4636 * ciphers is configured as pairwise.
4637 * We can set this to true for non-11n hardware, that'll be checked
4638 * separately along with the peer capabilities.
4639 */
1c4cb928 4640 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
77fdaa12
JB		 4641 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4642 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
1c4cb928 4643 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
a8243b72 4644 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
d545daba 4645 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
1c4cb928 4646 netdev_info(sdata->dev,
d545daba 4647 "disabling HT/VHT due to WEP/TKIP use\n");
1c4cb928
JB		 4648 }
4649 }
77fdaa12 4650
d545daba 4651 if (req->flags & ASSOC_REQ_DISABLE_HT) {
a8243b72 4652 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
d545daba
MP		 4653 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4654 }
ef96a842 4655
dd5ecfea
JB		 4656 if (req->flags & ASSOC_REQ_DISABLE_VHT)
4657 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4658
4e74bfdb
JB		 4659 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4660 sband = local->hw.wiphy->bands[req->bss->channel->band];
4661 if (!sband->ht_cap.ht_supported ||
095d81ce
JB		 4662 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4663 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
a8243b72 4664 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
095d81ce
JB		 4665 if (!bss->wmm_used &&
4666 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
1b49de26
JB		 4667 netdev_info(sdata->dev,
4668 "disabling HT as WMM/QoS is not supported by the AP\n");
1c4cb928 4669 }
4e74bfdb 4670
d545daba
MP		 4671 /* disable VHT if we don't support it or the AP doesn't use WMM */
4672 if (!sband->vht_cap.vht_supported ||
095d81ce
JB		 4673 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4674 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
d545daba 4675 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
095d81ce
JB		 4676 if (!bss->wmm_used &&
4677 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
1b49de26
JB		 4678 netdev_info(sdata->dev,
4679 "disabling VHT as WMM/QoS is not supported by the AP\n");
d545daba
MP		 4680 }
4681
ef96a842
BG		 4682 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4683 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4684 sizeof(ifmgd->ht_capa_mask));
4685
dd5ecfea
JB		 4686 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4687 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4688 sizeof(ifmgd->vht_capa_mask));
4689
77fdaa12 4690 if (req->ie && req->ie_len) {
66e67e41
JB		 4691 memcpy(assoc_data->ie, req->ie, req->ie_len);
4692 assoc_data->ie_len = req->ie_len;
4693 }
f679f65d 4694
66e67e41 4695 assoc_data->bss = req->bss;
f679f65d 4696
af6b6374
JB		 4697 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4698 if (ifmgd->powersave)
04ecd257 4699 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
af6b6374 4700 else
04ecd257 4701 sdata->smps_mode = IEEE80211_SMPS_OFF;
af6b6374 4702 } else
04ecd257 4703 sdata->smps_mode = ifmgd->req_smps;
af6b6374 4704
66e67e41 4705 assoc_data->capability = req->bss->capability;
66e67e41
JB		 4706 assoc_data->supp_rates = bss->supp_rates;
4707 assoc_data->supp_rates_len = bss->supp_rates_len;
9dde6423 4708
9caf0364 4709 rcu_read_lock();
9dde6423
JB		 4710 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4711 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4712 assoc_data->ap_ht_param =
4713 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4714 else
a8243b72 4715 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
b08fbbd8
JB		 4716 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4717 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4718 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4719 sizeof(struct ieee80211_vht_cap));
4720 else
4721 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
9caf0364 4722 rcu_read_unlock();
63f170e0 4723
848955cc
JB		 4724 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
4725 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK),
4726 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
4727 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
4728
ab13315a 4729 if (bss->wmm_used && bss->uapsd_supported &&
848955cc 4730 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
76f0303d 4731 assoc_data->uapsd = true;
ab13315a
KV		 4732 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4733 } else {
76f0303d 4734 assoc_data->uapsd = false;
ab13315a
KV		 4735 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4736 }
4737
77fdaa12 4738 if (req->prev_bssid)
66e67e41 4739 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12
JB		 4740
4741 if (req->use_mfp) {
4742 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4743 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4744 } else {
4745 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4746 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4747 }
4748
cd2f5dd7
AK		 4749 if (req->flags & ASSOC_REQ_USE_RRM)
4750 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
4751 else
4752 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
4753
77fdaa12
JB		 4754 if (req->crypto.control_port)
4755 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4756 else
4757 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4758
a621fa4d
JB		 4759 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4760 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
2475b1cc
MS		 4761 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
4762 sdata->vif.type);
a621fa4d 4763
66e67e41
JB		 4764 /* kick off associate process */
4765
4766 ifmgd->assoc_data = assoc_data;
826262c3 4767 ifmgd->dtim_period = 0;
989c6505 4768 ifmgd->have_beacon = false;
66e67e41 4769
a1cf775d
JB		 4770 err = ieee80211_prep_connection(sdata, req->bss, true);
4771 if (err)
4772 goto err_clear;
66e67e41 4773
c65dd147
EG		 4774 rcu_read_lock();
4775 beacon_ies = rcu_dereference(req->bss->beacon_ies);
826262c3 4776
c65dd147
EG		 4777 if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC &&
4778 !beacon_ies) {
4779 /*
4780 * Wait up to one beacon interval ...
4781 * should this be more if we miss one?
4782 */
4783 sdata_info(sdata, "waiting for beacon from %pM\n",
4784 ifmgd->bssid);
4785 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
89afe614 4786 assoc_data->timeout_started = true;
c65dd147
EG		 4787 assoc_data->need_beacon = true;
4788 } else if (beacon_ies) {
4789 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4790 beacon_ies->data,
4791 beacon_ies->len);
ef429dad
JB		 4792 u8 dtim_count = 0;
4793
c65dd147
EG		 4794 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4795 const struct ieee80211_tim_ie *tim;
4796 tim = (void *)(tim_ie + 2);
4797 ifmgd->dtim_period = tim->dtim_period;
ef429dad 4798 dtim_count = tim->dtim_count;
826262c3 4799 }
989c6505 4800 ifmgd->have_beacon = true;
66e67e41 4801 assoc_data->timeout = jiffies;
89afe614 4802 assoc_data->timeout_started = true;
ef429dad
JB		 4803
4804 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
4805 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4806 sdata->vif.bss_conf.sync_device_ts =
4807 bss->device_ts_beacon;
4808 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4809 }
c65dd147
EG		 4810 } else {
4811 assoc_data->timeout = jiffies;
89afe614 4812 assoc_data->timeout_started = true;
66e67e41 4813 }
c65dd147
EG		 4814 rcu_read_unlock();
4815
8d61ffa5 4816 run_again(sdata, assoc_data->timeout);
66e67e41 4817
fcff4f10
PS		 4818 if (bss->corrupt_data) {
4819 char *corrupt_type = "data";
4820 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4821 if (bss->corrupt_data &
4822 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4823 corrupt_type = "beacon and probe response";
4824 else
4825 corrupt_type = "beacon";
4826 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4827 corrupt_type = "probe response";
bdcbd8e0
JB		 4828 sdata_info(sdata, "associating with AP with corrupt %s\n",
4829 corrupt_type);
fcff4f10
PS		 4830 }
4831
8d61ffa5 4832 return 0;
66e67e41 4833 err_clear:
3d2abdfd
EP		 4834 memset(ifmgd->bssid, 0, ETH_ALEN);
4835 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 4836 ifmgd->assoc_data = NULL;
4837 err_free:
4838 kfree(assoc_data);
66e67e41 4839 return err;
f0706e82
JB		 4840}
4841
77fdaa12 4842int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
63c9c5e7 4843 struct cfg80211_deauth_request *req)
f0706e82 4844{
46900298 4845 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 4846 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
6863255b 4847 bool tx = !req->local_state_change;
f0706e82 4848
c9c3a060
JB		 4849 if (ifmgd->auth_data &&
4850 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
4851 sdata_info(sdata,
4852 "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
4853 req->bssid, req->reason_code,
4854 ieee80211_get_reason_code_string(req->reason_code));
0ff71613 4855
8c7d857c 4856 drv_mgd_prepare_tx(sdata->local, sdata);
37ad3888
JB		 4857 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4858 IEEE80211_STYPE_DEAUTH,
6863255b 4859 req->reason_code, tx,
37ad3888 4860 frame_buf);
86552017 4861 ieee80211_destroy_auth_data(sdata, false);
c9c3a060
JB		 4862 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4863 IEEE80211_DEAUTH_FRAME_LEN);
86552017 4864
c9c3a060 4865 return 0;
8c7d857c
EG		 4866 }
4867
86552017
JB		 4868 if (ifmgd->associated &&
4869 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
c9c3a060
JB		 4870 sdata_info(sdata,
4871 "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
4872 req->bssid, req->reason_code,
4873 ieee80211_get_reason_code_string(req->reason_code));
4874
86552017
JB		 4875 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4876 req->reason_code, tx, frame_buf);
6ff57cf8
JB		 4877 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4878 IEEE80211_DEAUTH_FRAME_LEN);
c9c3a060
JB		 4879 return 0;
4880 }
86552017 4881
c9c3a060 4882 return -ENOTCONN;
f0706e82 4883}
84363e6e 4884
77fdaa12 4885int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 4886 struct cfg80211_disassoc_request *req)
9c6bd790 4887{
77fdaa12 4888 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 4889 u8 bssid[ETH_ALEN];
6ae16775 4890 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
9c6bd790 4891
8d8b261a
JB		 4892 /*
4893 * cfg80211 should catch this ... but it's racy since
4894 * we can receive a disassoc frame, process it, hand it
4895 * to cfg80211 while that's in a locked section already
4896 * trying to tell us that the user wants to disconnect.
4897 */
8d61ffa5 4898 if (ifmgd->associated != req->bss)
77fdaa12 4899 return -ENOLINK;
77fdaa12 4900
bdcbd8e0 4901 sdata_info(sdata,
dfa1ad29
CO		 4902 "disassociating from %pM by local choice (Reason: %u=%s)\n",
4903 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
0ff71613 4904
e69e95db 4905 memcpy(bssid, req->bss->bssid, ETH_ALEN);
37ad3888
JB		 4906 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4907 req->reason_code, !req->local_state_change,
4908 frame_buf);
10f644a4 4909
6ff57cf8
JB		 4910 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4911 IEEE80211_DEAUTH_FRAME_LEN);
bc83b681 4912
10f644a4
JB		 4913 return 0;
4914}
026331c4 4915
afa762f6 4916void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
54e4ffb2
JB		 4917{
4918 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4919
49921859
BG		 4920 /*
4921 * Make sure some work items will not run after this,
4922 * they will not do anything but might not have been
4923 * cancelled when disconnecting.
4924 */
4925 cancel_work_sync(&ifmgd->monitor_work);
4926 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
4927 cancel_work_sync(&ifmgd->request_smps_work);
4928 cancel_work_sync(&ifmgd->csa_connection_drop_work);
4929 cancel_work_sync(&ifmgd->chswitch_work);
81dd2b88 4930 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
49921859 4931
8d61ffa5 4932 sdata_lock(sdata);
959867fa
JB		 4933 if (ifmgd->assoc_data) {
4934 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
54e4ffb2 4935 ieee80211_destroy_assoc_data(sdata, false);
959867fa
JB		 4936 cfg80211_assoc_timeout(sdata->dev, bss);
4937 }
54e4ffb2
JB		 4938 if (ifmgd->auth_data)
4939 ieee80211_destroy_auth_data(sdata, false);
1277b4a9
LK		 4940 spin_lock_bh(&ifmgd->teardown_lock);
4941 if (ifmgd->teardown_skb) {
4942 kfree_skb(ifmgd->teardown_skb);
4943 ifmgd->teardown_skb = NULL;
4944 ifmgd->orig_teardown_skb = NULL;
4945 }
4946 spin_unlock_bh(&ifmgd->teardown_lock);
54e4ffb2 4947 del_timer_sync(&ifmgd->timer);
8d61ffa5 4948 sdata_unlock(sdata);
54e4ffb2
JB		 4949}
4950
a97c13c3
JO		 4951void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
4952 enum nl80211_cqm_rssi_threshold_event rssi_event,
4953 gfp_t gfp)
4954{
4955 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4956
b5878a2d
JB		 4957 trace_api_cqm_rssi_notify(sdata, rssi_event);
4958
a97c13c3
JO		 4959 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
4960}
4961EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
98f03342
JB		 4962
4963void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
4964{
4965 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4966
4967 trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
4968
4969 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
4970}
4971EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);
Linux kernel - Deliverables
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