]> git.proxmox.com Git - mirror_ubuntu-bionic-kernel.git/blame - net/mac80211/mlme.c
projects / mirror_ubuntu-bionic-kernel.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
mac80211: add extended channel switching capability if the driver supports CSA
[mirror_ubuntu-bionic-kernel.git] / net / mac80211 / mlme.c
CommitLineData
f0706e82
JB		 1/*
2 * BSS client mode implementation
5394af4d 3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
f0706e82
JB		 4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
d98ad83e 8 * Copyright 2013-2014 Intel Mobile Communications GmbH
f0706e82
JB		 9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
13 */
14
5b323edb 15#include <linux/delay.h>
f0706e82
JB		 16#include <linux/if_ether.h>
17#include <linux/skbuff.h>
f0706e82 18#include <linux/if_arp.h>
f0706e82 19#include <linux/etherdevice.h>
d9b93842 20#include <linux/moduleparam.h>
d0709a65 21#include <linux/rtnetlink.h>
e8db0be1 22#include <linux/pm_qos.h>
d91f36db 23#include <linux/crc32.h>
5a0e3ad6 24#include <linux/slab.h>
bc3b2d7f 25#include <linux/export.h>
f0706e82 26#include <net/mac80211.h>
472dbc45 27#include <asm/unaligned.h>
60f8b39c 28
f0706e82 29#include "ieee80211_i.h"
24487981 30#include "driver-ops.h"
2c8dccc7
JB		 31#include "rate.h"
32#include "led.h"
f0706e82 33
1672c0e3 34#define IEEE80211_AUTH_TIMEOUT (HZ / 5)
cb236d2d 35#define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2)
1672c0e3
JB		 36#define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10)
37#define IEEE80211_AUTH_MAX_TRIES 3
38#define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
39#define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
cb236d2d 40#define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2)
1672c0e3
JB		 41#define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10)
42#define IEEE80211_ASSOC_MAX_TRIES 3
66e67e41 43
180205bd
BG		 44static int max_nullfunc_tries = 2;
45module_param(max_nullfunc_tries, int, 0644);
46MODULE_PARM_DESC(max_nullfunc_tries,
47 "Maximum nullfunc tx tries before disconnecting (reason 4).");
48
49static int max_probe_tries = 5;
50module_param(max_probe_tries, int, 0644);
51MODULE_PARM_DESC(max_probe_tries,
52 "Maximum probe tries before disconnecting (reason 4).");
b291ba11
JB		 53
54/*
7ccc8bd7
FF		 55 * Beacon loss timeout is calculated as N frames times the
56 * advertised beacon interval. This may need to be somewhat
57 * higher than what hardware might detect to account for
58 * delays in the host processing frames. But since we also
59 * probe on beacon miss before declaring the connection lost
60 * default to what we want.
b291ba11 61 */
59c1ec2b
BG		 62static int beacon_loss_count = 7;
63module_param(beacon_loss_count, int, 0644);
64MODULE_PARM_DESC(beacon_loss_count,
65 "Number of beacon intervals before we decide beacon was lost.");
7ccc8bd7 66
b291ba11
JB		 67/*
68 * Time the connection can be idle before we probe
69 * it to see if we can still talk to the AP.
70 */
d1c5091f 71#define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
b291ba11
JB		 72/*
73 * Time we wait for a probe response after sending
74 * a probe request because of beacon loss or for
75 * checking the connection still works.
76 */
180205bd
BG		 77static int probe_wait_ms = 500;
78module_param(probe_wait_ms, int, 0644);
79MODULE_PARM_DESC(probe_wait_ms,
80 "Maximum time(ms) to wait for probe response"
81 " before disconnecting (reason 4).");
f0706e82 82
17e4ec14
JM		 83/*
84 * Weight given to the latest Beacon frame when calculating average signal
85 * strength for Beacon frames received in the current BSS. This must be
86 * between 1 and 15.
87 */
88#define IEEE80211_SIGNAL_AVE_WEIGHT 3
89
391a200a
JM		 90/*
91 * How many Beacon frames need to have been used in average signal strength
92 * before starting to indicate signal change events.
93 */
94#define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
95
ca386f31
JB		 96/*
97 * We can have multiple work items (and connection probing)
98 * scheduling this timer, but we need to take care to only
99 * reschedule it when it should fire _earlier_ than it was
100 * asked for before, or if it's not pending right now. This
101 * function ensures that. Note that it then is required to
102 * run this function for all timeouts after the first one
103 * has happened -- the work that runs from this timer will
104 * do that.
105 */
8d61ffa5
JB		 106static void run_again(struct ieee80211_sub_if_data *sdata,
107 unsigned long timeout)
ca386f31 108{
8d61ffa5 109 sdata_assert_lock(sdata);
ca386f31 110
8d61ffa5
JB		 111 if (!timer_pending(&sdata->u.mgd.timer) ||
112 time_before(timeout, sdata->u.mgd.timer.expires))
113 mod_timer(&sdata->u.mgd.timer, timeout);
ca386f31
JB		 114}
115
d3a910a8 116void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
b291ba11 117{
c1288b12 118 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
b291ba11
JB		 119 return;
120
7eeff74c
JB		 121 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
122 return;
123
b291ba11 124 mod_timer(&sdata->u.mgd.bcn_mon_timer,
7ccc8bd7 125 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
b291ba11
JB		 126}
127
be099e82
LR		 128void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
129{
0c699c3a
LR		 130 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
131
8628172f
SG		 132 if (unlikely(!sdata->u.mgd.associated))
133 return;
134
448cd2e2
EP		 135 ifmgd->probe_send_count = 0;
136
be099e82
LR		 137 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
138 return;
139
140 mod_timer(&sdata->u.mgd.conn_mon_timer,
141 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
142}
143
5484e237 144static int ecw2cw(int ecw)
60f8b39c 145{
5484e237 146 return (1 << ecw) - 1;
60f8b39c
JB		 147}
148
6565ec9b
JB		 149static u32
150ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
151 struct ieee80211_supported_band *sband,
152 struct ieee80211_channel *channel,
53b954ee 153 const struct ieee80211_ht_cap *ht_cap,
6565ec9b
JB		 154 const struct ieee80211_ht_operation *ht_oper,
155 const struct ieee80211_vht_operation *vht_oper,
5cdaed1e 156 struct cfg80211_chan_def *chandef, bool tracking)
6565ec9b 157{
5cdaed1e 158 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6565ec9b
JB		 159 struct cfg80211_chan_def vht_chandef;
160 u32 ht_cfreq, ret;
161
162 chandef->chan = channel;
163 chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
164 chandef->center_freq1 = channel->center_freq;
165 chandef->center_freq2 = 0;
166
53b954ee 167 if (!ht_cap || !ht_oper || !sband->ht_cap.ht_supported) {
6565ec9b
JB		 168 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
169 goto out;
170 }
171
172 chandef->width = NL80211_CHAN_WIDTH_20;
173
53b954ee
EP		 174 if (!(ht_cap->cap_info &
175 cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40))) {
f3000e1b 176 ret = IEEE80211_STA_DISABLE_40MHZ;
53b954ee
EP		 177 goto out;
178 }
179
6565ec9b
JB		 180 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
181 channel->band);
182 /* check that channel matches the right operating channel */
5cdaed1e 183 if (!tracking && channel->center_freq != ht_cfreq) {
6565ec9b
JB		 184 /*
185 * It's possible that some APs are confused here;
186 * Netgear WNDR3700 sometimes reports 4 higher than
187 * the actual channel in association responses, but
188 * since we look at probe response/beacon data here
189 * it should be OK.
190 */
5cdaed1e
JB		 191 sdata_info(sdata,
192 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
193 channel->center_freq, ht_cfreq,
194 ht_oper->primary_chan, channel->band);
6565ec9b
JB		 195 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
196 goto out;
197 }
198
199 /* check 40 MHz support, if we have it */
200 if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
201 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
202 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
203 chandef->width = NL80211_CHAN_WIDTH_40;
204 chandef->center_freq1 += 10;
205 break;
206 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
207 chandef->width = NL80211_CHAN_WIDTH_40;
208 chandef->center_freq1 -= 10;
209 break;
210 }
211 } else {
212 /* 40 MHz (and 80 MHz) must be supported for VHT */
213 ret = IEEE80211_STA_DISABLE_VHT;
85220d71
JB		 214 /* also mark 40 MHz disabled */
215 ret |= IEEE80211_STA_DISABLE_40MHZ;
6565ec9b
JB		 216 goto out;
217 }
218
219 if (!vht_oper || !sband->vht_cap.vht_supported) {
220 ret = IEEE80211_STA_DISABLE_VHT;
221 goto out;
222 }
223
224 vht_chandef.chan = channel;
225 vht_chandef.center_freq1 =
226 ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx,
227 channel->band);
228 vht_chandef.center_freq2 = 0;
229
6565ec9b
JB		 230 switch (vht_oper->chan_width) {
231 case IEEE80211_VHT_CHANWIDTH_USE_HT:
232 vht_chandef.width = chandef->width;
cb664981 233 vht_chandef.center_freq1 = chandef->center_freq1;
6565ec9b
JB		 234 break;
235 case IEEE80211_VHT_CHANWIDTH_80MHZ:
236 vht_chandef.width = NL80211_CHAN_WIDTH_80;
237 break;
238 case IEEE80211_VHT_CHANWIDTH_160MHZ:
239 vht_chandef.width = NL80211_CHAN_WIDTH_160;
240 break;
241 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
242 vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
6553bf04
JB		 243 vht_chandef.center_freq2 =
244 ieee80211_channel_to_frequency(
245 vht_oper->center_freq_seg2_idx,
246 channel->band);
6565ec9b
JB		 247 break;
248 default:
5cdaed1e 249 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
30eb1dc2
JB		 250 sdata_info(sdata,
251 "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
252 vht_oper->chan_width);
6565ec9b
JB		 253 ret = IEEE80211_STA_DISABLE_VHT;
254 goto out;
255 }
256
257 if (!cfg80211_chandef_valid(&vht_chandef)) {
5cdaed1e 258 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
30eb1dc2
JB		 259 sdata_info(sdata,
260 "AP VHT information is invalid, disable VHT\n");
6565ec9b
JB		 261 ret = IEEE80211_STA_DISABLE_VHT;
262 goto out;
263 }
264
265 if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
266 ret = 0;
267 goto out;
268 }
269
270 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
5cdaed1e 271 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
30eb1dc2
JB		 272 sdata_info(sdata,
273 "AP VHT information doesn't match HT, disable VHT\n");
6565ec9b
JB		 274 ret = IEEE80211_STA_DISABLE_VHT;
275 goto out;
276 }
277
278 *chandef = vht_chandef;
279
280 ret = 0;
281
282out:
963a1852
JB		 283 /*
284 * When tracking the current AP, don't do any further checks if the
285 * new chandef is identical to the one we're currently using for the
286 * connection. This keeps us from playing ping-pong with regulatory,
287 * without it the following can happen (for example):
288 * - connect to an AP with 80 MHz, world regdom allows 80 MHz
289 * - AP advertises regdom US
290 * - CRDA loads regdom US with 80 MHz prohibited (old database)
291 * - the code below detects an unsupported channel, downgrades, and
292 * we disconnect from the AP in the caller
293 * - disconnect causes CRDA to reload world regdomain and the game
294 * starts anew.
295 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
296 *
297 * It seems possible that there are still scenarios with CSA or real
298 * bandwidth changes where a this could happen, but those cases are
299 * less common and wouldn't completely prevent using the AP.
300 */
301 if (tracking &&
302 cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef))
303 return ret;
304
586e01ed
JB		 305 /* don't print the message below for VHT mismatch if VHT is disabled */
306 if (ret & IEEE80211_STA_DISABLE_VHT)
307 vht_chandef = *chandef;
308
ddfe49b4
JB		 309 /*
310 * Ignore the DISABLED flag when we're already connected and only
311 * tracking the APs beacon for bandwidth changes - otherwise we
312 * might get disconnected here if we connect to an AP, update our
313 * regulatory information based on the AP's country IE and the
314 * information we have is wrong/outdated and disables the channel
315 * that we're actually using for the connection to the AP.
316 */
6565ec9b 317 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
ddfe49b4
JB		 318 tracking ? 0 :
319 IEEE80211_CHAN_DISABLED)) {
6565ec9b
JB		 320 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
321 ret = IEEE80211_STA_DISABLE_HT |
322 IEEE80211_STA_DISABLE_VHT;
b56e4b85 323 break;
6565ec9b
JB		 324 }
325
e6b7cde4 326 ret |= ieee80211_chandef_downgrade(chandef);
6565ec9b
JB		 327 }
328
5cdaed1e 329 if (chandef->width != vht_chandef.width && !tracking)
6565ec9b
JB		 330 sdata_info(sdata,
331 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
332
333 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
334 return ret;
335}
336
30eb1dc2
JB		 337static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
338 struct sta_info *sta,
53b954ee 339 const struct ieee80211_ht_cap *ht_cap,
30eb1dc2
JB		 340 const struct ieee80211_ht_operation *ht_oper,
341 const struct ieee80211_vht_operation *vht_oper,
342 const u8 *bssid, u32 *changed)
d5522e03
JB		 343{
344 struct ieee80211_local *local = sdata->local;
30eb1dc2 345 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d5522e03 346 struct ieee80211_supported_band *sband;
55de908a 347 struct ieee80211_channel *chan;
30eb1dc2 348 struct cfg80211_chan_def chandef;
9ed6bcce 349 u16 ht_opmode;
30eb1dc2
JB		 350 u32 flags;
351 enum ieee80211_sta_rx_bandwidth new_sta_bw;
352 int ret;
d5522e03 353
30eb1dc2
JB		 354 /* if HT was/is disabled, don't track any bandwidth changes */
355 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
1128958d
JB		 356 return 0;
357
30eb1dc2
JB		 358 /* don't check VHT if we associated as non-VHT station */
359 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
360 vht_oper = NULL;
361
362 if (WARN_ON_ONCE(!sta))
363 return -EINVAL;
364
017b45bb
AA		 365 /*
366 * if bss configuration changed store the new one -
367 * this may be applicable even if channel is identical
368 */
369 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
370 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
371 *changed |= BSS_CHANGED_HT;
372 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
373 }
374
f2d9330e 375 chan = sdata->vif.bss_conf.chandef.chan;
55de908a 376 sband = local->hw.wiphy->bands[chan->band];
d5522e03 377
30eb1dc2 378 /* calculate new channel (type) based on HT/VHT operation IEs */
53b954ee
EP		 379 flags = ieee80211_determine_chantype(sdata, sband, chan,
380 ht_cap, ht_oper, vht_oper,
381 &chandef, true);
30eb1dc2
JB		 382
383 /*
384 * Downgrade the new channel if we associated with restricted
385 * capabilities. For example, if we associated as a 20 MHz STA
386 * to a 40 MHz AP (due to regulatory, capabilities or config
387 * reasons) then switching to a 40 MHz channel now won't do us
388 * any good -- we couldn't use it with the AP.
389 */
390 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
391 chandef.width == NL80211_CHAN_WIDTH_80P80)
e6b7cde4 392 flags |= ieee80211_chandef_downgrade(&chandef);
30eb1dc2
JB		 393 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
394 chandef.width == NL80211_CHAN_WIDTH_160)
e6b7cde4 395 flags |= ieee80211_chandef_downgrade(&chandef);
30eb1dc2
JB		 396 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
397 chandef.width > NL80211_CHAN_WIDTH_20)
e6b7cde4 398 flags |= ieee80211_chandef_downgrade(&chandef);
30eb1dc2
JB		 399
400 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
401 return 0;
402
403 sdata_info(sdata,
404 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
405 ifmgd->bssid, chandef.chan->center_freq, chandef.width,
406 chandef.center_freq1, chandef.center_freq2);
407
408 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
409 IEEE80211_STA_DISABLE_VHT |
410 IEEE80211_STA_DISABLE_40MHZ |
411 IEEE80211_STA_DISABLE_80P80MHZ |
412 IEEE80211_STA_DISABLE_160MHZ)) ||
413 !cfg80211_chandef_valid(&chandef)) {
414 sdata_info(sdata,
415 "AP %pM changed bandwidth in a way we can't support - disconnect\n",
416 ifmgd->bssid);
417 return -EINVAL;
418 }
419
420 switch (chandef.width) {
421 case NL80211_CHAN_WIDTH_20_NOHT:
422 case NL80211_CHAN_WIDTH_20:
423 new_sta_bw = IEEE80211_STA_RX_BW_20;
424 break;
4bf88530 425 case NL80211_CHAN_WIDTH_40:
30eb1dc2 426 new_sta_bw = IEEE80211_STA_RX_BW_40;
64f68e5d 427 break;
30eb1dc2
JB		 428 case NL80211_CHAN_WIDTH_80:
429 new_sta_bw = IEEE80211_STA_RX_BW_80;
430 break;
431 case NL80211_CHAN_WIDTH_80P80:
432 case NL80211_CHAN_WIDTH_160:
433 new_sta_bw = IEEE80211_STA_RX_BW_160;
64f68e5d 434 break;
30eb1dc2
JB		 435 default:
436 return -EINVAL;
64f68e5d 437 }
d5522e03 438
30eb1dc2
JB		 439 if (new_sta_bw > sta->cur_max_bandwidth)
440 new_sta_bw = sta->cur_max_bandwidth;
64f68e5d 441
30eb1dc2
JB		 442 if (new_sta_bw < sta->sta.bandwidth) {
443 sta->sta.bandwidth = new_sta_bw;
444 rate_control_rate_update(local, sband, sta,
445 IEEE80211_RC_BW_CHANGED);
446 }
64f68e5d 447
30eb1dc2
JB		 448 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
449 if (ret) {
450 sdata_info(sdata,
451 "AP %pM changed bandwidth to incompatible one - disconnect\n",
452 ifmgd->bssid);
453 return ret;
454 }
7cc44ed4 455
30eb1dc2
JB		 456 if (new_sta_bw > sta->sta.bandwidth) {
457 sta->sta.bandwidth = new_sta_bw;
458 rate_control_rate_update(local, sband, sta,
459 IEEE80211_RC_BW_CHANGED);
0aaffa9b 460 }
d5522e03 461
30eb1dc2 462 return 0;
d5522e03
JB		 463}
464
9c6bd790
JB		 465/* frame sending functions */
466
66e67e41 467static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
9dde6423 468 struct sk_buff *skb, u8 ap_ht_param,
66e67e41
JB		 469 struct ieee80211_supported_band *sband,
470 struct ieee80211_channel *channel,
471 enum ieee80211_smps_mode smps)
472{
66e67e41
JB		 473 u8 *pos;
474 u32 flags = channel->flags;
475 u16 cap;
476 struct ieee80211_sta_ht_cap ht_cap;
477
478 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
479
66e67e41
JB		 480 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
481 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
482
66e67e41
JB		 483 /* determine capability flags */
484 cap = ht_cap.cap;
485
9dde6423 486 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
66e67e41
JB		 487 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
488 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
489 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
490 cap &= ~IEEE80211_HT_CAP_SGI_40;
491 }
492 break;
493 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
494 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
495 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
496 cap &= ~IEEE80211_HT_CAP_SGI_40;
497 }
498 break;
499 }
500
24398e39
JB		 501 /*
502 * If 40 MHz was disabled associate as though we weren't
503 * capable of 40 MHz -- some broken APs will never fall
504 * back to trying to transmit in 20 MHz.
505 */
506 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
507 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
508 cap &= ~IEEE80211_HT_CAP_SGI_40;
509 }
510
66e67e41
JB		 511 /* set SM PS mode properly */
512 cap &= ~IEEE80211_HT_CAP_SM_PS;
513 switch (smps) {
514 case IEEE80211_SMPS_AUTOMATIC:
515 case IEEE80211_SMPS_NUM_MODES:
516 WARN_ON(1);
517 case IEEE80211_SMPS_OFF:
518 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
519 IEEE80211_HT_CAP_SM_PS_SHIFT;
520 break;
521 case IEEE80211_SMPS_STATIC:
522 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
523 IEEE80211_HT_CAP_SM_PS_SHIFT;
524 break;
525 case IEEE80211_SMPS_DYNAMIC:
526 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
527 IEEE80211_HT_CAP_SM_PS_SHIFT;
528 break;
529 }
530
531 /* reserve and fill IE */
532 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
533 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
534}
535
d545daba
MP		 536static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
537 struct sk_buff *skb,
b08fbbd8
JB		 538 struct ieee80211_supported_band *sband,
539 struct ieee80211_vht_cap *ap_vht_cap)
d545daba
MP		 540{
541 u8 *pos;
542 u32 cap;
543 struct ieee80211_sta_vht_cap vht_cap;
c1cf6d4e 544 u32 mask, ap_bf_sts, our_bf_sts;
d545daba
MP		 545
546 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
547
548 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
dd5ecfea 549 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
d545daba
MP		 550
551 /* determine capability flags */
552 cap = vht_cap.cap;
553
f2d9d270
JB		 554 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
555 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ;
556 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
557 }
558
559 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
560 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
561 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
562 }
563
b08fbbd8
JB		 564 /*
565 * Some APs apparently get confused if our capabilities are better
566 * than theirs, so restrict what we advertise in the assoc request.
567 */
568 if (!(ap_vht_cap->vht_cap_info &
569 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
570 cap &= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE;
571
c1cf6d4e
ES		 572 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK;
573
574 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask;
575 our_bf_sts = cap & mask;
576
577 if (ap_bf_sts < our_bf_sts) {
578 cap &= ~mask;
579 cap |= ap_bf_sts;
580 }
581
d545daba 582 /* reserve and fill IE */
d4950281 583 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
d545daba
MP		 584 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
585}
586
66e67e41
JB		 587static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
588{
589 struct ieee80211_local *local = sdata->local;
590 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
591 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
592 struct sk_buff *skb;
593 struct ieee80211_mgmt *mgmt;
594 u8 *pos, qos_info;
595 size_t offset = 0, noffset;
2103dec1 596 int i, count, rates_len, supp_rates_len, shift;
66e67e41
JB		 597 u16 capab;
598 struct ieee80211_supported_band *sband;
55de908a
JB		 599 struct ieee80211_chanctx_conf *chanctx_conf;
600 struct ieee80211_channel *chan;
2103dec1 601 u32 rate_flags, rates = 0;
66e67e41 602
8d61ffa5 603 sdata_assert_lock(sdata);
66e67e41 604
55de908a
JB		 605 rcu_read_lock();
606 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
607 if (WARN_ON(!chanctx_conf)) {
608 rcu_read_unlock();
609 return;
610 }
4bf88530 611 chan = chanctx_conf->def.chan;
2103dec1 612 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
55de908a
JB		 613 rcu_read_unlock();
614 sband = local->hw.wiphy->bands[chan->band];
2103dec1 615 shift = ieee80211_vif_get_shift(&sdata->vif);
66e67e41
JB		 616
617 if (assoc_data->supp_rates_len) {
618 /*
619 * Get all rates supported by the device and the AP as
620 * some APs don't like getting a superset of their rates
621 * in the association request (e.g. D-Link DAP 1353 in
622 * b-only mode)...
623 */
2103dec1
SW		 624 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
625 assoc_data->supp_rates,
626 assoc_data->supp_rates_len,
627 &rates);
66e67e41
JB		 628 } else {
629 /*
630 * In case AP not provide any supported rates information
631 * before association, we send information element(s) with
632 * all rates that we support.
633 */
2103dec1
SW		 634 rates_len = 0;
635 for (i = 0; i < sband->n_bitrates; i++) {
636 if ((rate_flags & sband->bitrates[i].flags)
637 != rate_flags)
638 continue;
639 rates |= BIT(i);
640 rates_len++;
641 }
66e67e41
JB		 642 }
643
644 skb = alloc_skb(local->hw.extra_tx_headroom +
645 sizeof(*mgmt) + /* bit too much but doesn't matter */
646 2 + assoc_data->ssid_len + /* SSID */
647 4 + rates_len + /* (extended) rates */
648 4 + /* power capability */
649 2 + 2 * sband->n_channels + /* supported channels */
650 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
d4950281 651 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
66e67e41
JB		 652 assoc_data->ie_len + /* extra IEs */
653 9, /* WMM */
654 GFP_KERNEL);
655 if (!skb)
656 return;
657
658 skb_reserve(skb, local->hw.extra_tx_headroom);
659
660 capab = WLAN_CAPABILITY_ESS;
661
662 if (sband->band == IEEE80211_BAND_2GHZ) {
663 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
664 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
665 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
666 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
667 }
668
669 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
670 capab |= WLAN_CAPABILITY_PRIVACY;
671
672 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
673 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
674 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
675
cd2f5dd7
AK		 676 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM)
677 capab |= WLAN_CAPABILITY_RADIO_MEASURE;
678
66e67e41
JB		 679 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
680 memset(mgmt, 0, 24);
681 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
682 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
683 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
684
685 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
686 skb_put(skb, 10);
687 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
688 IEEE80211_STYPE_REASSOC_REQ);
689 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
690 mgmt->u.reassoc_req.listen_interval =
691 cpu_to_le16(local->hw.conf.listen_interval);
692 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
693 ETH_ALEN);
694 } else {
695 skb_put(skb, 4);
696 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
697 IEEE80211_STYPE_ASSOC_REQ);
698 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
699 mgmt->u.assoc_req.listen_interval =
700 cpu_to_le16(local->hw.conf.listen_interval);
701 }
702
703 /* SSID */
704 pos = skb_put(skb, 2 + assoc_data->ssid_len);
705 *pos++ = WLAN_EID_SSID;
706 *pos++ = assoc_data->ssid_len;
707 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
708
709 /* add all rates which were marked to be used above */
710 supp_rates_len = rates_len;
711 if (supp_rates_len > 8)
712 supp_rates_len = 8;
713
714 pos = skb_put(skb, supp_rates_len + 2);
715 *pos++ = WLAN_EID_SUPP_RATES;
716 *pos++ = supp_rates_len;
717
718 count = 0;
719 for (i = 0; i < sband->n_bitrates; i++) {
720 if (BIT(i) & rates) {
2103dec1
SW		 721 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
722 5 * (1 << shift));
723 *pos++ = (u8) rate;
66e67e41
JB		 724 if (++count == 8)
725 break;
726 }
727 }
728
729 if (rates_len > count) {
730 pos = skb_put(skb, rates_len - count + 2);
731 *pos++ = WLAN_EID_EXT_SUPP_RATES;
732 *pos++ = rates_len - count;
733
734 for (i++; i < sband->n_bitrates; i++) {
735 if (BIT(i) & rates) {
2103dec1
SW		 736 int rate;
737 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
738 5 * (1 << shift));
739 *pos++ = (u8) rate;
66e67e41
JB		 740 }
741 }
742 }
743
cd2f5dd7
AK		 744 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT ||
745 capab & WLAN_CAPABILITY_RADIO_MEASURE) {
66e67e41
JB		 746 pos = skb_put(skb, 4);
747 *pos++ = WLAN_EID_PWR_CAPABILITY;
748 *pos++ = 2;
749 *pos++ = 0; /* min tx power */
0430c883
SW		 750 /* max tx power */
751 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
cd2f5dd7 752 }
66e67e41 753
cd2f5dd7 754 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
66e67e41
JB		 755 /* TODO: get this in reg domain format */
756 pos = skb_put(skb, 2 * sband->n_channels + 2);
757 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
758 *pos++ = 2 * sband->n_channels;
759 for (i = 0; i < sband->n_channels; i++) {
760 *pos++ = ieee80211_frequency_to_channel(
761 sband->channels[i].center_freq);
762 *pos++ = 1; /* one channel in the subband*/
763 }
764 }
765
766 /* if present, add any custom IEs that go before HT */
b3f51e94 767 if (assoc_data->ie_len) {
66e67e41
JB		 768 static const u8 before_ht[] = {
769 WLAN_EID_SSID,
770 WLAN_EID_SUPP_RATES,
771 WLAN_EID_EXT_SUPP_RATES,
772 WLAN_EID_PWR_CAPABILITY,
773 WLAN_EID_SUPPORTED_CHANNELS,
774 WLAN_EID_RSN,
775 WLAN_EID_QOS_CAPA,
776 WLAN_EID_RRM_ENABLED_CAPABILITIES,
777 WLAN_EID_MOBILITY_DOMAIN,
778 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
779 };
780 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
781 before_ht, ARRAY_SIZE(before_ht),
782 offset);
783 pos = skb_put(skb, noffset - offset);
784 memcpy(pos, assoc_data->ie + offset, noffset - offset);
785 offset = noffset;
786 }
787
f2d9d270
JB		 788 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
789 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
790 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
791
a8243b72 792 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
9dde6423 793 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
04ecd257 794 sband, chan, sdata->smps_mode);
66e67e41 795
3de3802c
JB		 796 /* if present, add any custom IEs that go before VHT */
797 if (assoc_data->ie_len) {
798 static const u8 before_vht[] = {
799 WLAN_EID_SSID,
800 WLAN_EID_SUPP_RATES,
801 WLAN_EID_EXT_SUPP_RATES,
802 WLAN_EID_PWR_CAPABILITY,
803 WLAN_EID_SUPPORTED_CHANNELS,
804 WLAN_EID_RSN,
805 WLAN_EID_QOS_CAPA,
806 WLAN_EID_RRM_ENABLED_CAPABILITIES,
807 WLAN_EID_MOBILITY_DOMAIN,
808 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
809 WLAN_EID_HT_CAPABILITY,
810 WLAN_EID_BSS_COEX_2040,
811 WLAN_EID_EXT_CAPABILITY,
812 WLAN_EID_QOS_TRAFFIC_CAPA,
813 WLAN_EID_TIM_BCAST_REQ,
814 WLAN_EID_INTERWORKING,
815 };
816 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
817 before_vht, ARRAY_SIZE(before_vht),
818 offset);
819 pos = skb_put(skb, noffset - offset);
820 memcpy(pos, assoc_data->ie + offset, noffset - offset);
821 offset = noffset;
822 }
823
d545daba 824 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
b08fbbd8
JB		 825 ieee80211_add_vht_ie(sdata, skb, sband,
826 &assoc_data->ap_vht_cap);
d545daba 827
66e67e41 828 /* if present, add any custom non-vendor IEs that go after HT */
b3f51e94 829 if (assoc_data->ie_len) {
66e67e41
JB		 830 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
831 assoc_data->ie_len,
832 offset);
833 pos = skb_put(skb, noffset - offset);
834 memcpy(pos, assoc_data->ie + offset, noffset - offset);
835 offset = noffset;
836 }
837
76f0303d
JB		 838 if (assoc_data->wmm) {
839 if (assoc_data->uapsd) {
dc41e4d4
EP		 840 qos_info = ifmgd->uapsd_queues;
841 qos_info |= (ifmgd->uapsd_max_sp_len <<
66e67e41
JB		 842 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
843 } else {
844 qos_info = 0;
845 }
846
40b861a0 847 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
66e67e41
JB		 848 }
849
850 /* add any remaining custom (i.e. vendor specific here) IEs */
b3f51e94 851 if (assoc_data->ie_len) {
66e67e41
JB		 852 noffset = assoc_data->ie_len;
853 pos = skb_put(skb, noffset - offset);
854 memcpy(pos, assoc_data->ie + offset, noffset - offset);
855 }
856
a1845fc7
JB		 857 drv_mgd_prepare_tx(local, sdata);
858
66e67e41 859 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1672c0e3
JB		 860 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
861 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
862 IEEE80211_TX_INTFL_MLME_CONN_TX;
66e67e41
JB		 863 ieee80211_tx_skb(sdata, skb);
864}
865
572e0012
KV		 866void ieee80211_send_pspoll(struct ieee80211_local *local,
867 struct ieee80211_sub_if_data *sdata)
868{
572e0012
KV		 869 struct ieee80211_pspoll *pspoll;
870 struct sk_buff *skb;
572e0012 871
d8cd189e
KV		 872 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
873 if (!skb)
572e0012 874 return;
572e0012 875
d8cd189e
KV		 876 pspoll = (struct ieee80211_pspoll *) skb->data;
877 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
572e0012 878
62ae67be
JB		 879 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
880 ieee80211_tx_skb(sdata, skb);
572e0012
KV		 881}
882
965bedad
JB		 883void ieee80211_send_nullfunc(struct ieee80211_local *local,
884 struct ieee80211_sub_if_data *sdata,
885 int powersave)
886{
887 struct sk_buff *skb;
d8cd189e 888 struct ieee80211_hdr_3addr *nullfunc;
b6f35301 889 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
965bedad 890
d8cd189e
KV		 891 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
892 if (!skb)
965bedad 893 return;
965bedad 894
d8cd189e 895 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
965bedad 896 if (powersave)
d8cd189e 897 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
965bedad 898
6c17b77b
SF		 899 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
900 IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
ff40b425
PF		 901
902 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
903 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
904
392b9ffb 905 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
b6f35301
RM		 906 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
907
62ae67be 908 ieee80211_tx_skb(sdata, skb);
965bedad
JB		 909}
910
d524215f
FF		 911static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
912 struct ieee80211_sub_if_data *sdata)
913{
914 struct sk_buff *skb;
915 struct ieee80211_hdr *nullfunc;
916 __le16 fc;
917
918 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
919 return;
920
921 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
d15b8459 922 if (!skb)
d524215f 923 return;
d15b8459 924
d524215f
FF		 925 skb_reserve(skb, local->hw.extra_tx_headroom);
926
927 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
928 memset(nullfunc, 0, 30);
929 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
930 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
931 nullfunc->frame_control = fc;
932 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
933 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
934 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
935 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
936
937 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
938 ieee80211_tx_skb(sdata, skb);
939}
940
cc32abd4
JB		 941/* spectrum management related things */
942static void ieee80211_chswitch_work(struct work_struct *work)
943{
944 struct ieee80211_sub_if_data *sdata =
945 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
675a0b04 946 struct ieee80211_local *local = sdata->local;
cc32abd4 947 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
7578d575 948 int ret;
cc32abd4 949
9607e6b6 950 if (!ieee80211_sdata_running(sdata))
cc32abd4
JB		 951 return;
952
8d61ffa5 953 sdata_lock(sdata);
4c3ebc56
MK		 954 mutex_lock(&local->mtx);
955 mutex_lock(&local->chanctx_mtx);
956
77fdaa12
JB		 957 if (!ifmgd->associated)
958 goto out;
cc32abd4 959
4c3ebc56
MK		 960 if (!sdata->vif.csa_active)
961 goto out;
962
963 /*
964 * using reservation isn't immediate as it may be deferred until later
965 * with multi-vif. once reservation is complete it will re-schedule the
966 * work with no reserved_chanctx so verify chandef to check if it
967 * completed successfully
968 */
969
970 if (sdata->reserved_chanctx) {
971 /*
972 * with multi-vif csa driver may call ieee80211_csa_finish()
973 * many times while waiting for other interfaces to use their
974 * reservations
975 */
976 if (sdata->reserved_ready)
977 goto out;
978
979 ret = ieee80211_vif_use_reserved_context(sdata);
980 if (ret) {
981 sdata_info(sdata,
982 "failed to use reserved channel context, disconnecting (err=%d)\n",
983 ret);
984 ieee80211_queue_work(&sdata->local->hw,
985 &ifmgd->csa_connection_drop_work);
986 goto out;
987 }
988
989 goto out;
990 }
991
992 if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
993 &sdata->csa_chandef)) {
7578d575 994 sdata_info(sdata,
4c3ebc56 995 "failed to finalize channel switch, disconnecting\n");
7578d575
AN		 996 ieee80211_queue_work(&sdata->local->hw,
997 &ifmgd->csa_connection_drop_work);
998 goto out;
999 }
675a0b04 1000
cc32abd4 1001 /* XXX: shouldn't really modify cfg80211-owned data! */
33787fc4 1002 ifmgd->associated->channel = sdata->csa_chandef.chan;
cc32abd4 1003
59af6928 1004 sdata->vif.csa_active = false;
4c3ebc56 1005
57eebdf3 1006 /* XXX: wait for a beacon first? */
a46992b4
LC		 1007 if (sdata->csa_block_tx) {
1008 ieee80211_wake_vif_queues(local, sdata,
1009 IEEE80211_QUEUE_STOP_REASON_CSA);
1010 sdata->csa_block_tx = false;
1011 }
7578d575 1012
e5593f56
MK		 1013 ieee80211_sta_reset_beacon_monitor(sdata);
1014 ieee80211_sta_reset_conn_monitor(sdata);
1015
59af6928 1016out:
4c3ebc56
MK		 1017 mutex_unlock(&local->chanctx_mtx);
1018 mutex_unlock(&local->mtx);
8d61ffa5 1019 sdata_unlock(sdata);
cc32abd4
JB		 1020}
1021
5ce6e438
JB		 1022void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1023{
55de908a
JB		 1024 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1025 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5ce6e438
JB		 1026
1027 trace_api_chswitch_done(sdata, success);
1028 if (!success) {
882a7c69
JB		 1029 sdata_info(sdata,
1030 "driver channel switch failed, disconnecting\n");
1031 ieee80211_queue_work(&sdata->local->hw,
1032 &ifmgd->csa_connection_drop_work);
1033 } else {
1034 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
5ce6e438 1035 }
5ce6e438
JB		 1036}
1037EXPORT_SYMBOL(ieee80211_chswitch_done);
1038
cc32abd4
JB		 1039static void ieee80211_chswitch_timer(unsigned long data)
1040{
1041 struct ieee80211_sub_if_data *sdata =
1042 (struct ieee80211_sub_if_data *) data;
5bb644a0 1043
9b7d72c1 1044 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
cc32abd4
JB		 1045}
1046
37799e52 1047static void
4a3cb702 1048ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
2ba45384
LC		 1049 u64 timestamp, u32 device_timestamp,
1050 struct ieee802_11_elems *elems,
04a161f4 1051 bool beacon)
cc32abd4 1052{
b4f286a1 1053 struct ieee80211_local *local = sdata->local;
cc32abd4 1054 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
37799e52 1055 struct cfg80211_bss *cbss = ifmgd->associated;
4c3ebc56 1056 struct ieee80211_chanctx_conf *conf;
55de908a 1057 struct ieee80211_chanctx *chanctx;
e6b7cde4 1058 enum ieee80211_band current_band;
c0f17eb9 1059 struct ieee80211_csa_ie csa_ie;
e6b7cde4 1060 int res;
cc32abd4 1061
8d61ffa5 1062 sdata_assert_lock(sdata);
77fdaa12 1063
37799e52 1064 if (!cbss)
cc32abd4
JB		 1065 return;
1066
b4f286a1 1067 if (local->scanning)
cc32abd4
JB		 1068 return;
1069
37799e52 1070 /* disregard subsequent announcements if we are already processing */
3e2a0226 1071 if (sdata->vif.csa_active)
cc32abd4
JB		 1072 return;
1073
e6b7cde4 1074 current_band = cbss->channel->band;
c0f17eb9 1075 memset(&csa_ie, 0, sizeof(csa_ie));
e6b7cde4
SW		 1076 res = ieee80211_parse_ch_switch_ie(sdata, elems, beacon, current_band,
1077 ifmgd->flags,
c0f17eb9 1078 ifmgd->associated->bssid, &csa_ie);
e6b7cde4 1079 if (res < 0)
b4f286a1 1080 ieee80211_queue_work(&local->hw,
882a7c69 1081 &ifmgd->csa_connection_drop_work);
e6b7cde4 1082 if (res)
cc32abd4 1083 return;
cd64f2a9 1084
c0f17eb9 1085 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
85220d71
JB		 1086 IEEE80211_CHAN_DISABLED)) {
1087 sdata_info(sdata,
1088 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
e6b7cde4 1089 ifmgd->associated->bssid,
c0f17eb9
CYY		 1090 csa_ie.chandef.chan->center_freq,
1091 csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1092 csa_ie.chandef.center_freq2);
85220d71
JB		 1093 ieee80211_queue_work(&local->hw,
1094 &ifmgd->csa_connection_drop_work);
1095 return;
1096 }
1097
4c3ebc56 1098 mutex_lock(&local->mtx);
7578d575 1099 mutex_lock(&local->chanctx_mtx);
4c3ebc56
MK		 1100 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1101 lockdep_is_held(&local->chanctx_mtx));
1102 if (!conf) {
1103 sdata_info(sdata,
1104 "no channel context assigned to vif?, disconnecting\n");
1105 ieee80211_queue_work(&local->hw,
1106 &ifmgd->csa_connection_drop_work);
1107 mutex_unlock(&local->chanctx_mtx);
1108 mutex_unlock(&local->mtx);
1109 return;
1110 }
1111
1112 chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1113
b4f286a1 1114 if (local->use_chanctx) {
7578d575
AN		 1115 u32 num_chanctx = 0;
1116 list_for_each_entry(chanctx, &local->chanctx_list, list)
1117 num_chanctx++;
1118
1119 if (num_chanctx > 1 ||
1120 !(local->hw.flags & IEEE80211_HW_CHANCTX_STA_CSA)) {
1121 sdata_info(sdata,
1122 "not handling chan-switch with channel contexts\n");
1123 ieee80211_queue_work(&local->hw,
1124 &ifmgd->csa_connection_drop_work);
1125 mutex_unlock(&local->chanctx_mtx);
4c3ebc56 1126 mutex_unlock(&local->mtx);
7578d575
AN		 1127 return;
1128 }
55de908a
JB		 1129 }
1130
4c3ebc56
MK		 1131 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1132 chanctx->mode, false);
1133 if (res) {
55de908a 1134 sdata_info(sdata,
4c3ebc56
MK		 1135 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1136 res);
b4f286a1 1137 ieee80211_queue_work(&local->hw,
55de908a 1138 &ifmgd->csa_connection_drop_work);
b4f286a1 1139 mutex_unlock(&local->chanctx_mtx);
4c3ebc56 1140 mutex_unlock(&local->mtx);
55de908a
JB		 1141 return;
1142 }
b4f286a1 1143 mutex_unlock(&local->chanctx_mtx);
55de908a 1144
c46a73f3 1145 sdata->vif.csa_active = true;
4c3ebc56 1146 sdata->csa_chandef = csa_ie.chandef;
59af6928 1147 sdata->csa_block_tx = csa_ie.mode;
55de908a 1148
59af6928 1149 if (sdata->csa_block_tx)
a46992b4
LC		 1150 ieee80211_stop_vif_queues(local, sdata,
1151 IEEE80211_QUEUE_STOP_REASON_CSA);
59af6928 1152 mutex_unlock(&local->mtx);
57eebdf3 1153
b4f286a1 1154 if (local->ops->channel_switch) {
5ce6e438 1155 /* use driver's channel switch callback */
57eebdf3
JB		 1156 struct ieee80211_channel_switch ch_switch = {
1157 .timestamp = timestamp,
2ba45384 1158 .device_timestamp = device_timestamp,
c0f17eb9
CYY		 1159 .block_tx = csa_ie.mode,
1160 .chandef = csa_ie.chandef,
1161 .count = csa_ie.count,
57eebdf3
JB		 1162 };
1163
b4f286a1 1164 drv_channel_switch(local, &ch_switch);
5ce6e438
JB		 1165 return;
1166 }
1167
1168 /* channel switch handled in software */
c0f17eb9 1169 if (csa_ie.count <= 1)
b4f286a1 1170 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
57eebdf3 1171 else
cc32abd4 1172 mod_timer(&ifmgd->chswitch_timer,
c0f17eb9 1173 TU_TO_EXP_TIME(csa_ie.count * cbss->beacon_interval));
cc32abd4
JB		 1174}
1175
24a4e400
SG		 1176static bool
1177ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1178 struct ieee80211_channel *channel,
1179 const u8 *country_ie, u8 country_ie_len,
1180 const u8 *pwr_constr_elem,
1181 int *chan_pwr, int *pwr_reduction)
cc32abd4 1182{
04b7b2ff
JB		 1183 struct ieee80211_country_ie_triplet *triplet;
1184 int chan = ieee80211_frequency_to_channel(channel->center_freq);
24a4e400 1185 int i, chan_increment;
04b7b2ff 1186 bool have_chan_pwr = false;
cc32abd4 1187
04b7b2ff
JB		 1188 /* Invalid IE */
1189 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
24a4e400 1190 return false;
cc32abd4 1191
04b7b2ff
JB		 1192 triplet = (void *)(country_ie + 3);
1193 country_ie_len -= 3;
1194
1195 switch (channel->band) {
1196 default:
1197 WARN_ON_ONCE(1);
1198 /* fall through */
1199 case IEEE80211_BAND_2GHZ:
1200 case IEEE80211_BAND_60GHZ:
1201 chan_increment = 1;
1202 break;
1203 case IEEE80211_BAND_5GHZ:
1204 chan_increment = 4;
1205 break;
cc32abd4 1206 }
04b7b2ff
JB		 1207
1208 /* find channel */
1209 while (country_ie_len >= 3) {
1210 u8 first_channel = triplet->chans.first_channel;
1211
1212 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1213 goto next;
1214
1215 for (i = 0; i < triplet->chans.num_channels; i++) {
1216 if (first_channel + i * chan_increment == chan) {
1217 have_chan_pwr = true;
24a4e400 1218 *chan_pwr = triplet->chans.max_power;
04b7b2ff
JB		 1219 break;
1220 }
1221 }
1222 if (have_chan_pwr)
1223 break;
1224
1225 next:
1226 triplet++;
1227 country_ie_len -= 3;
1228 }
1229
24a4e400
SG		 1230 if (have_chan_pwr)
1231 *pwr_reduction = *pwr_constr_elem;
1232 return have_chan_pwr;
1233}
1234
c8d65917
SG		 1235static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
1236 struct ieee80211_channel *channel,
1237 const u8 *cisco_dtpc_ie,
1238 int *pwr_level)
1239{
1240 /* From practical testing, the first data byte of the DTPC element
1241 * seems to contain the requested dBm level, and the CLI on Cisco
1242 * APs clearly state the range is -127 to 127 dBm, which indicates
1243 * a signed byte, although it seemingly never actually goes negative.
1244 * The other byte seems to always be zero.
1245 */
1246 *pwr_level = (__s8)cisco_dtpc_ie[4];
1247}
1248
24a4e400
SG		 1249static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1250 struct ieee80211_channel *channel,
1251 struct ieee80211_mgmt *mgmt,
1252 const u8 *country_ie, u8 country_ie_len,
c8d65917
SG		 1253 const u8 *pwr_constr_ie,
1254 const u8 *cisco_dtpc_ie)
24a4e400 1255{
c8d65917
SG		 1256 bool has_80211h_pwr = false, has_cisco_pwr = false;
1257 int chan_pwr = 0, pwr_reduction_80211h = 0;
1258 int pwr_level_cisco, pwr_level_80211h;
24a4e400 1259 int new_ap_level;
04b7b2ff 1260
24a4e400
SG		 1261 if (country_ie && pwr_constr_ie &&
1262 mgmt->u.probe_resp.capab_info &
1263 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT)) {
1264 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
1265 sdata, channel, country_ie, country_ie_len,
1266 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
c8d65917
SG		 1267 pwr_level_80211h =
1268 max_t(int, 0, chan_pwr - pwr_reduction_80211h);
1269 }
1270
1271 if (cisco_dtpc_ie) {
1272 ieee80211_find_cisco_dtpc(
1273 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
1274 has_cisco_pwr = true;
24a4e400 1275 }
04b7b2ff 1276
c8d65917 1277 if (!has_80211h_pwr && !has_cisco_pwr)
1ea6f9c0 1278 return 0;
04b7b2ff 1279
c8d65917
SG		 1280 /* If we have both 802.11h and Cisco DTPC, apply both limits
1281 * by picking the smallest of the two power levels advertised.
1282 */
1283 if (has_80211h_pwr &&
1284 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
1285 sdata_info(sdata,
1286 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1287 pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
1288 sdata->u.mgd.bssid);
1289 new_ap_level = pwr_level_80211h;
1290 } else { /* has_cisco_pwr is always true here. */
1291 sdata_info(sdata,
1292 "Limiting TX power to %d dBm as advertised by %pM\n",
1293 pwr_level_cisco, sdata->u.mgd.bssid);
1294 new_ap_level = pwr_level_cisco;
1295 }
04b7b2ff 1296
1ea6f9c0
JB		 1297 if (sdata->ap_power_level == new_ap_level)
1298 return 0;
04b7b2ff 1299
1ea6f9c0
JB		 1300 sdata->ap_power_level = new_ap_level;
1301 if (__ieee80211_recalc_txpower(sdata))
1302 return BSS_CHANGED_TXPOWER;
1303 return 0;
cc32abd4
JB		 1304}
1305
965bedad
JB		 1306/* powersave */
1307static void ieee80211_enable_ps(struct ieee80211_local *local,
1308 struct ieee80211_sub_if_data *sdata)
1309{
1310 struct ieee80211_conf *conf = &local->hw.conf;
1311
d5edaedc
JB		 1312 /*
1313 * If we are scanning right now then the parameters will
1314 * take effect when scan finishes.
1315 */
fbe9c429 1316 if (local->scanning)
d5edaedc
JB		 1317 return;
1318
965bedad
JB		 1319 if (conf->dynamic_ps_timeout > 0 &&
1320 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
1321 mod_timer(&local->dynamic_ps_timer, jiffies +
1322 msecs_to_jiffies(conf->dynamic_ps_timeout));
1323 } else {
1324 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1325 ieee80211_send_nullfunc(local, sdata, 1);
375177bf 1326
2a13052f
JO		 1327 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1328 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
1329 return;
1330
1331 conf->flags |= IEEE80211_CONF_PS;
1332 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965bedad
JB		 1333 }
1334}
1335
1336static void ieee80211_change_ps(struct ieee80211_local *local)
1337{
1338 struct ieee80211_conf *conf = &local->hw.conf;
1339
1340 if (local->ps_sdata) {
965bedad
JB		 1341 ieee80211_enable_ps(local, local->ps_sdata);
1342 } else if (conf->flags & IEEE80211_CONF_PS) {
1343 conf->flags &= ~IEEE80211_CONF_PS;
1344 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1345 del_timer_sync(&local->dynamic_ps_timer);
1346 cancel_work_sync(&local->dynamic_ps_enable_work);
1347 }
1348}
1349
808118cb
JY		 1350static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1351{
1352 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1353 struct sta_info *sta = NULL;
c2c98fde 1354 bool authorized = false;
808118cb
JY		 1355
1356 if (!mgd->powersave)
1357 return false;
1358
05cb9108
JB		 1359 if (mgd->broken_ap)
1360 return false;
1361
808118cb
JY		 1362 if (!mgd->associated)
1363 return false;
1364
392b9ffb 1365 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
808118cb
JY		 1366 return false;
1367
989c6505 1368 if (!mgd->have_beacon)
ce857888
AB		 1369 return false;
1370
808118cb
JY		 1371 rcu_read_lock();
1372 sta = sta_info_get(sdata, mgd->bssid);
1373 if (sta)
c2c98fde 1374 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
808118cb
JY		 1375 rcu_read_unlock();
1376
c2c98fde 1377 return authorized;
808118cb
JY		 1378}
1379
965bedad 1380/* need to hold RTNL or interface lock */
10f644a4 1381void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 1382{
1383 struct ieee80211_sub_if_data *sdata, *found = NULL;
1384 int count = 0;
195e294d 1385 int timeout;
965bedad
JB		 1386
1387 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
1388 local->ps_sdata = NULL;
1389 return;
1390 }
1391
1392 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 1393 if (!ieee80211_sdata_running(sdata))
965bedad 1394 continue;
8c7914de
RM		 1395 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1396 /* If an AP vif is found, then disable PS
1397 * by setting the count to zero thereby setting
1398 * ps_sdata to NULL.
1399 */
1400 count = 0;
1401 break;
1402 }
965bedad
JB		 1403 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1404 continue;
1405 found = sdata;
1406 count++;
1407 }
1408
808118cb 1409 if (count == 1 && ieee80211_powersave_allowed(found)) {
10f644a4
JB		 1410 s32 beaconint_us;
1411
1412 if (latency < 0)
ed77134b 1413 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
10f644a4
JB		 1414
1415 beaconint_us = ieee80211_tu_to_usec(
1416 found->vif.bss_conf.beacon_int);
1417
ff616381 1418 timeout = local->dynamic_ps_forced_timeout;
195e294d
JO		 1419 if (timeout < 0) {
1420 /*
ff616381
JO		 1421 * Go to full PSM if the user configures a very low
1422 * latency requirement.
0ab82b04
EP		 1423 * The 2000 second value is there for compatibility
1424 * until the PM_QOS_NETWORK_LATENCY is configured
1425 * with real values.
195e294d 1426 */
0ab82b04
EP		 1427 if (latency > (1900 * USEC_PER_MSEC) &&
1428 latency != (2000 * USEC_PER_SEC))
195e294d 1429 timeout = 0;
ff616381
JO		 1430 else
1431 timeout = 100;
195e294d 1432 }
09b85568 1433 local->hw.conf.dynamic_ps_timeout = timeout;
195e294d 1434
04fe2037 1435 if (beaconint_us > latency) {
10f644a4 1436 local->ps_sdata = NULL;
04fe2037 1437 } else {
04fe2037 1438 int maxslp = 1;
826262c3 1439 u8 dtimper = found->u.mgd.dtim_period;
56007a02
JB		 1440
1441 /* If the TIM IE is invalid, pretend the value is 1 */
1442 if (!dtimper)
1443 dtimper = 1;
1444 else if (dtimper > 1)
04fe2037
JB		 1445 maxslp = min_t(int, dtimper,
1446 latency / beaconint_us);
1447
9ccebe61 1448 local->hw.conf.max_sleep_period = maxslp;
56007a02 1449 local->hw.conf.ps_dtim_period = dtimper;
10f644a4 1450 local->ps_sdata = found;
04fe2037 1451 }
10f644a4 1452 } else {
965bedad 1453 local->ps_sdata = NULL;
10f644a4 1454 }
965bedad
JB		 1455
1456 ieee80211_change_ps(local);
1457}
1458
ab095877
EP		 1459void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1460{
1461 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1462
1463 if (sdata->vif.bss_conf.ps != ps_allowed) {
1464 sdata->vif.bss_conf.ps = ps_allowed;
1465 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1466 }
1467}
1468
965bedad
JB		 1469void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1470{
1471 struct ieee80211_local *local =
1472 container_of(work, struct ieee80211_local,
1473 dynamic_ps_disable_work);
1474
1475 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1476 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1477 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1478 }
1479
1480 ieee80211_wake_queues_by_reason(&local->hw,
445ea4e8 1481 IEEE80211_MAX_QUEUE_MAP,
cca07b00
LC		 1482 IEEE80211_QUEUE_STOP_REASON_PS,
1483 false);
965bedad
JB		 1484}
1485
1486void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1487{
1488 struct ieee80211_local *local =
1489 container_of(work, struct ieee80211_local,
1490 dynamic_ps_enable_work);
1491 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
5e34069c 1492 struct ieee80211_if_managed *ifmgd;
1ddc2867
RM		 1493 unsigned long flags;
1494 int q;
965bedad
JB		 1495
1496 /* can only happen when PS was just disabled anyway */
1497 if (!sdata)
1498 return;
1499
5e34069c
CL		 1500 ifmgd = &sdata->u.mgd;
1501
965bedad
JB		 1502 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1503 return;
1504
09b85568 1505 if (local->hw.conf.dynamic_ps_timeout > 0) {
77b7023a
AN		 1506 /* don't enter PS if TX frames are pending */
1507 if (drv_tx_frames_pending(local)) {
1ddc2867
RM		 1508 mod_timer(&local->dynamic_ps_timer, jiffies +
1509 msecs_to_jiffies(
1510 local->hw.conf.dynamic_ps_timeout));
1511 return;
1512 }
77b7023a
AN		 1513
1514 /*
1515 * transmission can be stopped by others which leads to
1516 * dynamic_ps_timer expiry. Postpone the ps timer if it
1517 * is not the actual idle state.
1518 */
1519 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1520 for (q = 0; q < local->hw.queues; q++) {
1521 if (local->queue_stop_reasons[q]) {
1522 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1523 flags);
1524 mod_timer(&local->dynamic_ps_timer, jiffies +
1525 msecs_to_jiffies(
1526 local->hw.conf.dynamic_ps_timeout));
1527 return;
1528 }
1529 }
1530 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1ddc2867 1531 }
1ddc2867 1532
375177bf 1533 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
9c38a8b4 1534 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
a1598383 1535 if (drv_tx_frames_pending(local)) {
e8306f98
VN		 1536 mod_timer(&local->dynamic_ps_timer, jiffies +
1537 msecs_to_jiffies(
1538 local->hw.conf.dynamic_ps_timeout));
a1598383 1539 } else {
e8306f98
VN		 1540 ieee80211_send_nullfunc(local, sdata, 1);
1541 /* Flush to get the tx status of nullfunc frame */
39ecc01d 1542 ieee80211_flush_queues(local, sdata);
e8306f98 1543 }
f3e85b9e
VN		 1544 }
1545
2a13052f
JO		 1546 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1547 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
375177bf
VN		 1548 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1549 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1550 local->hw.conf.flags |= IEEE80211_CONF_PS;
1551 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1552 }
965bedad
JB		 1553}
1554
1555void ieee80211_dynamic_ps_timer(unsigned long data)
1556{
1557 struct ieee80211_local *local = (void *) data;
1558
78f1a8b7 1559 if (local->quiescing || local->suspended)
5bb644a0
JB		 1560 return;
1561
42935eca 1562 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 1563}
1564
164eb02d
SW		 1565void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1566{
1567 struct delayed_work *delayed_work =
1568 container_of(work, struct delayed_work, work);
1569 struct ieee80211_sub_if_data *sdata =
1570 container_of(delayed_work, struct ieee80211_sub_if_data,
1571 dfs_cac_timer_work);
d2859df5 1572 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
164eb02d 1573
34a3740d
JB		 1574 mutex_lock(&sdata->local->mtx);
1575 if (sdata->wdev.cac_started) {
1576 ieee80211_vif_release_channel(sdata);
1577 cfg80211_cac_event(sdata->dev, &chandef,
1578 NL80211_RADAR_CAC_FINISHED,
1579 GFP_KERNEL);
1580 }
1581 mutex_unlock(&sdata->local->mtx);
164eb02d
SW		 1582}
1583
60f8b39c 1584/* MLME */
7d25745d 1585static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
4ced3f74 1586 struct ieee80211_sub_if_data *sdata,
4a3cb702 1587 const u8 *wmm_param, size_t wmm_param_len)
f0706e82 1588{
f0706e82 1589 struct ieee80211_tx_queue_params params;
4ced3f74 1590 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1591 size_t left;
1592 int count;
4a3cb702
JB		 1593 const u8 *pos;
1594 u8 uapsd_queues = 0;
f0706e82 1595
e1b3ec1a 1596 if (!local->ops->conf_tx)
7d25745d 1597 return false;
e1b3ec1a 1598
32c5057b 1599 if (local->hw.queues < IEEE80211_NUM_ACS)
7d25745d 1600 return false;
3434fbd3
JB		 1601
1602 if (!wmm_param)
7d25745d 1603 return false;
3434fbd3 1604
f0706e82 1605 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
7d25745d 1606 return false;
ab13315a
KV		 1607
1608 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
dc41e4d4 1609 uapsd_queues = ifmgd->uapsd_queues;
ab13315a 1610
f0706e82 1611 count = wmm_param[6] & 0x0f;
46900298 1612 if (count == ifmgd->wmm_last_param_set)
7d25745d 1613 return false;
46900298 1614 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 1615
1616 pos = wmm_param + 8;
1617 left = wmm_param_len - 8;
1618
1619 memset(&params, 0, sizeof(params));
1620
00e96dec 1621 sdata->wmm_acm = 0;
f0706e82
JB		 1622 for (; left >= 4; left -= 4, pos += 4) {
1623 int aci = (pos[0] >> 5) & 0x03;
1624 int acm = (pos[0] >> 4) & 0x01;
ab13315a 1625 bool uapsd = false;
f0706e82
JB		 1626 int queue;
1627
1628 switch (aci) {
0eeb59fe 1629 case 1: /* AC_BK */
e100bb64 1630 queue = 3;
988c0f72 1631 if (acm)
00e96dec 1632 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV		 1633 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1634 uapsd = true;
f0706e82 1635 break;
0eeb59fe 1636 case 2: /* AC_VI */
e100bb64 1637 queue = 1;
988c0f72 1638 if (acm)
00e96dec 1639 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV		 1640 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1641 uapsd = true;
f0706e82 1642 break;
0eeb59fe 1643 case 3: /* AC_VO */
e100bb64 1644 queue = 0;
988c0f72 1645 if (acm)
00e96dec 1646 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV		 1647 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1648 uapsd = true;
f0706e82 1649 break;
0eeb59fe 1650 case 0: /* AC_BE */
f0706e82 1651 default:
e100bb64 1652 queue = 2;
988c0f72 1653 if (acm)
00e96dec 1654 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV		 1655 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1656 uapsd = true;
f0706e82
JB		 1657 break;
1658 }
1659
1660 params.aifs = pos[0] & 0x0f;
1661 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1662 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 1663 params.txop = get_unaligned_le16(pos + 2);
908f8d07 1664 params.acm = acm;
ab13315a
KV		 1665 params.uapsd = uapsd;
1666
bdcbd8e0
JB		 1667 mlme_dbg(sdata,
1668 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1669 queue, aci, acm,
1670 params.aifs, params.cw_min, params.cw_max,
1671 params.txop, params.uapsd);
f6f3def3
EP		 1672 sdata->tx_conf[queue] = params;
1673 if (drv_conf_tx(local, sdata, queue, &params))
bdcbd8e0
JB		 1674 sdata_err(sdata,
1675 "failed to set TX queue parameters for queue %d\n",
1676 queue);
f0706e82 1677 }
e1b3ec1a
SG		 1678
1679 /* enable WMM or activate new settings */
4ced3f74 1680 sdata->vif.bss_conf.qos = true;
7d25745d 1681 return true;
f0706e82
JB		 1682}
1683
925e64c3
SG		 1684static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1685{
1686 lockdep_assert_held(&sdata->local->mtx);
1687
392b9ffb 1688 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
925e64c3
SG		 1689 ieee80211_run_deferred_scan(sdata->local);
1690}
1691
1692static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1693{
1694 mutex_lock(&sdata->local->mtx);
1695 __ieee80211_stop_poll(sdata);
1696 mutex_unlock(&sdata->local->mtx);
1697}
1698
7a5158ef
JB		 1699static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1700 u16 capab, bool erp_valid, u8 erp)
5628221c 1701{
bda3933a 1702 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 1703 u32 changed = 0;
7a5158ef
JB		 1704 bool use_protection;
1705 bool use_short_preamble;
1706 bool use_short_slot;
1707
1708 if (erp_valid) {
1709 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1710 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1711 } else {
1712 use_protection = false;
1713 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1714 }
1715
1716 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
55de908a 1717 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
43d35343 1718 use_short_slot = true;
5628221c 1719
471b3efd 1720 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 1721 bss_conf->use_cts_prot = use_protection;
1722 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 1723 }
7e9ed188 1724
d43c7b37 1725 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 1726 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 1727 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 1728 }
d9430a32 1729
7a5158ef 1730 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 1731 bss_conf->use_short_slot = use_short_slot;
1732 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 1733 }
1734
1735 return changed;
1736}
1737
f698d856 1738static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 1739 struct cfg80211_bss *cbss,
ae5eb026 1740 u32 bss_info_changed)
f0706e82 1741{
0c1ad2ca 1742 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 1743 struct ieee80211_local *local = sdata->local;
68542962 1744 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
d6f2da5b 1745
ae5eb026 1746 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 1747 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
50ae34a2 1748 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 1749
7ccc8bd7 1750 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
59c1ec2b 1751 beacon_loss_count * bss_conf->beacon_int));
7ccc8bd7 1752
0c1ad2ca
JB		 1753 sdata->u.mgd.associated = cbss;
1754 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 1755
17e4ec14
JM		 1756 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1757
488dd7b5 1758 if (sdata->vif.p2p) {
9caf0364 1759 const struct cfg80211_bss_ies *ies;
488dd7b5 1760
9caf0364
JB		 1761 rcu_read_lock();
1762 ies = rcu_dereference(cbss->ies);
1763 if (ies) {
9caf0364
JB		 1764 int ret;
1765
1766 ret = cfg80211_get_p2p_attr(
1767 ies->data, ies->len,
1768 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
67baf663
JD		 1769 (u8 *) &bss_conf->p2p_noa_attr,
1770 sizeof(bss_conf->p2p_noa_attr));
9caf0364 1771 if (ret >= 2) {
67baf663
JD		 1772 sdata->u.mgd.p2p_noa_index =
1773 bss_conf->p2p_noa_attr.index;
9caf0364 1774 bss_info_changed |= BSS_CHANGED_P2P_PS;
9caf0364 1775 }
488dd7b5 1776 }
9caf0364 1777 rcu_read_unlock();
488dd7b5
JB		 1778 }
1779
b291ba11 1780 /* just to be sure */
925e64c3 1781 ieee80211_stop_poll(sdata);
b291ba11 1782
9ac19a90 1783 ieee80211_led_assoc(local, 1);
9306102e 1784
989c6505 1785 if (sdata->u.mgd.have_beacon) {
826262c3
JB		 1786 /*
1787 * If the AP is buggy we may get here with no DTIM period
1788 * known, so assume it's 1 which is the only safe assumption
1789 * in that case, although if the TIM IE is broken powersave
1790 * probably just won't work at all.
1791 */
1792 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
817cee76 1793 bss_conf->beacon_rate = bss->beacon_rate;
989c6505 1794 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
826262c3 1795 } else {
817cee76 1796 bss_conf->beacon_rate = NULL;
e5b900d2 1797 bss_conf->dtim_period = 0;
826262c3 1798 }
e5b900d2 1799
68542962 1800 bss_conf->assoc = 1;
9cef8737 1801
a97c13c3 1802 /* Tell the driver to monitor connection quality (if supported) */
ea086359 1803 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
68542962 1804 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 1805 bss_info_changed |= BSS_CHANGED_CQM;
1806
68542962 1807 /* Enable ARP filtering */
0f19b41e 1808 if (bss_conf->arp_addr_cnt)
68542962 1809 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
68542962 1810
ae5eb026 1811 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 1812
056508dc
JB		 1813 mutex_lock(&local->iflist_mtx);
1814 ieee80211_recalc_ps(local, -1);
1815 mutex_unlock(&local->iflist_mtx);
e0cb686f 1816
04ecd257 1817 ieee80211_recalc_smps(sdata);
ab095877
EP		 1818 ieee80211_recalc_ps_vif(sdata);
1819
9ac19a90 1820 netif_carrier_on(sdata->dev);
f0706e82
JB		 1821}
1822
e69e95db 1823static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
37ad3888
JB		 1824 u16 stype, u16 reason, bool tx,
1825 u8 *frame_buf)
aa458d17 1826{
46900298 1827 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17 1828 struct ieee80211_local *local = sdata->local;
3cc5240b 1829 u32 changed = 0;
aa458d17 1830
8d61ffa5 1831 sdata_assert_lock(sdata);
77fdaa12 1832
37ad3888
JB		 1833 if (WARN_ON_ONCE(tx && !frame_buf))
1834 return;
1835
b291ba11
JB		 1836 if (WARN_ON(!ifmgd->associated))
1837 return;
1838
79543d8e
DS		 1839 ieee80211_stop_poll(sdata);
1840
77fdaa12 1841 ifmgd->associated = NULL;
aa458d17
TW		 1842 netif_carrier_off(sdata->dev);
1843
88bc40e8
EP		 1844 /*
1845 * if we want to get out of ps before disassoc (why?) we have
1846 * to do it before sending disassoc, as otherwise the null-packet
1847 * won't be valid.
1848 */
1849 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1850 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1851 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1852 }
1853 local->ps_sdata = NULL;
1854
ab095877
EP		 1855 /* disable per-vif ps */
1856 ieee80211_recalc_ps_vif(sdata);
1857
f823981e
EP		 1858 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1859 if (tx)
39ecc01d 1860 ieee80211_flush_queues(local, sdata);
f823981e 1861
37ad3888
JB		 1862 /* deauthenticate/disassociate now */
1863 if (tx || frame_buf)
88a9e31c
EP		 1864 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
1865 reason, tx, frame_buf);
37ad3888
JB		 1866
1867 /* flush out frame */
1868 if (tx)
39ecc01d 1869 ieee80211_flush_queues(local, sdata);
37ad3888 1870
88a9e31c
EP		 1871 /* clear bssid only after building the needed mgmt frames */
1872 memset(ifmgd->bssid, 0, ETH_ALEN);
1873
37ad3888 1874 /* remove AP and TDLS peers */
d34ba216 1875 sta_info_flush(sdata);
37ad3888
JB		 1876
1877 /* finally reset all BSS / config parameters */
f5e5bf25
TW		 1878 changed |= ieee80211_reset_erp_info(sdata);
1879
f5e5bf25 1880 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 1881 changed |= BSS_CHANGED_ASSOC;
1882 sdata->vif.bss_conf.assoc = false;
f5e5bf25 1883
67baf663
JD		 1884 ifmgd->p2p_noa_index = -1;
1885 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
1886 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
488dd7b5 1887
dd5ecfea 1888 /* on the next assoc, re-program HT/VHT parameters */
ef96a842
BG		 1889 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1890 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
dd5ecfea
JB		 1891 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
1892 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
413ad50a 1893
1ea6f9c0 1894 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
a8302de9 1895
520eb820
KV		 1896 del_timer_sync(&local->dynamic_ps_timer);
1897 cancel_work_sync(&local->dynamic_ps_enable_work);
1898
68542962 1899 /* Disable ARP filtering */
0f19b41e 1900 if (sdata->vif.bss_conf.arp_addr_cnt)
68542962 1901 changed |= BSS_CHANGED_ARP_FILTER;
68542962 1902
3abead59
JB		 1903 sdata->vif.bss_conf.qos = false;
1904 changed |= BSS_CHANGED_QOS;
1905
0aaffa9b
JB		 1906 /* The BSSID (not really interesting) and HT changed */
1907 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 1908 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 1909
3abead59
JB		 1910 /* disassociated - set to defaults now */
1911 ieee80211_set_wmm_default(sdata, false);
1912
b9dcf712
JB		 1913 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1914 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1915 del_timer_sync(&sdata->u.mgd.timer);
1916 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2d9957cc 1917
826262c3 1918 sdata->vif.bss_conf.dtim_period = 0;
817cee76
AB		 1919 sdata->vif.bss_conf.beacon_rate = NULL;
1920
989c6505 1921 ifmgd->have_beacon = false;
826262c3 1922
028e8da0 1923 ifmgd->flags = 0;
34a3740d 1924 mutex_lock(&local->mtx);
028e8da0 1925 ieee80211_vif_release_channel(sdata);
59af6928
MK		 1926
1927 sdata->vif.csa_active = false;
a46992b4
LC		 1928 if (sdata->csa_block_tx) {
1929 ieee80211_wake_vif_queues(local, sdata,
1930 IEEE80211_QUEUE_STOP_REASON_CSA);
1931 sdata->csa_block_tx = false;
1932 }
34a3740d 1933 mutex_unlock(&local->mtx);
2475b1cc
MS		 1934
1935 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
aa458d17 1936}
f0706e82 1937
3cf335d5
KV		 1938void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1939 struct ieee80211_hdr *hdr)
1940{
1941 /*
1942 * We can postpone the mgd.timer whenever receiving unicast frames
1943 * from AP because we know that the connection is working both ways
1944 * at that time. But multicast frames (and hence also beacons) must
1945 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 1946 * data idle periods for sending the periodic probe request to the
1947 * AP we're connected to.
3cf335d5 1948 */
b291ba11
JB		 1949 if (is_multicast_ether_addr(hdr->addr1))
1950 return;
1951
be099e82 1952 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 1953}
f0706e82 1954
4e5ff376
FF		 1955static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1956{
1957 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
133d40f9 1958 struct ieee80211_local *local = sdata->local;
4e5ff376 1959
133d40f9 1960 mutex_lock(&local->mtx);
392b9ffb
SG		 1961 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
1962 goto out;
4e5ff376 1963
925e64c3 1964 __ieee80211_stop_poll(sdata);
133d40f9
SG		 1965
1966 mutex_lock(&local->iflist_mtx);
1967 ieee80211_recalc_ps(local, -1);
1968 mutex_unlock(&local->iflist_mtx);
4e5ff376
FF		 1969
1970 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
133d40f9 1971 goto out;
4e5ff376
FF		 1972
1973 /*
1974 * We've received a probe response, but are not sure whether
1975 * we have or will be receiving any beacons or data, so let's
1976 * schedule the timers again, just in case.
1977 */
1978 ieee80211_sta_reset_beacon_monitor(sdata);
1979
1980 mod_timer(&ifmgd->conn_mon_timer,
1981 round_jiffies_up(jiffies +
1982 IEEE80211_CONNECTION_IDLE_TIME));
133d40f9 1983out:
133d40f9 1984 mutex_unlock(&local->mtx);
4e5ff376
FF		 1985}
1986
1987void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
04ac3c0e 1988 struct ieee80211_hdr *hdr, bool ack)
4e5ff376 1989{
75706d0e 1990 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF		 1991 return;
1992
4e5ff376
FF		 1993 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1994 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e 1995 if (ack)
cab1c7fd 1996 ieee80211_sta_reset_conn_monitor(sdata);
04ac3c0e
FF		 1997 else
1998 sdata->u.mgd.nullfunc_failed = true;
4e5ff376 1999 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
cab1c7fd 2000 return;
4e5ff376 2001 }
cab1c7fd
WD		 2002
2003 if (ack)
2004 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF		 2005}
2006
a43abf29
ML		 2007static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2008{
2009 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2010 const u8 *ssid;
f01a067d 2011 u8 *dst = ifmgd->associated->bssid;
180205bd 2012 u8 unicast_limit = max(1, max_probe_tries - 3);
f01a067d
LR		 2013
2014 /*
2015 * Try sending broadcast probe requests for the last three
2016 * probe requests after the first ones failed since some
2017 * buggy APs only support broadcast probe requests.
2018 */
2019 if (ifmgd->probe_send_count >= unicast_limit)
2020 dst = NULL;
a43abf29 2021
4e5ff376
FF		 2022 /*
2023 * When the hardware reports an accurate Tx ACK status, it's
2024 * better to send a nullfunc frame instead of a probe request,
2025 * as it will kick us off the AP quickly if we aren't associated
2026 * anymore. The timeout will be reset if the frame is ACKed by
2027 * the AP.
2028 */
992e68bf
SD		 2029 ifmgd->probe_send_count++;
2030
04ac3c0e
FF		 2031 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2032 ifmgd->nullfunc_failed = false;
4e5ff376 2033 ieee80211_send_nullfunc(sdata->local, sdata, 0);
04ac3c0e 2034 } else {
88c868c4
SG		 2035 int ssid_len;
2036
9caf0364 2037 rcu_read_lock();
4e5ff376 2038 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
88c868c4
SG		 2039 if (WARN_ON_ONCE(ssid == NULL))
2040 ssid_len = 0;
2041 else
2042 ssid_len = ssid[1];
2043
2044 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
1672c0e3 2045 0, (u32) -1, true, 0,
55de908a 2046 ifmgd->associated->channel, false);
9caf0364 2047 rcu_read_unlock();
4e5ff376 2048 }
a43abf29 2049
180205bd 2050 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
8d61ffa5 2051 run_again(sdata, ifmgd->probe_timeout);
f69b9c79 2052 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
39ecc01d 2053 ieee80211_flush_queues(sdata->local, sdata);
a43abf29
ML		 2054}
2055
b291ba11
JB		 2056static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2057 bool beacon)
04de8381 2058{
04de8381 2059 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 2060 bool already = false;
34bfc411 2061
9607e6b6 2062 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 2063 return;
2064
8d61ffa5 2065 sdata_lock(sdata);
77fdaa12
JB		 2066
2067 if (!ifmgd->associated)
2068 goto out;
2069
133d40f9
SG		 2070 mutex_lock(&sdata->local->mtx);
2071
2072 if (sdata->local->tmp_channel || sdata->local->scanning) {
2073 mutex_unlock(&sdata->local->mtx);
2074 goto out;
2075 }
2076
a13fbe54 2077 if (beacon) {
bdcbd8e0 2078 mlme_dbg_ratelimited(sdata,
59c1ec2b
BG		 2079 "detected beacon loss from AP (missed %d beacons) - probing\n",
2080 beacon_loss_count);
bdcbd8e0 2081
a13fbe54
BG		 2082 ieee80211_cqm_rssi_notify(&sdata->vif,
2083 NL80211_CQM_RSSI_BEACON_LOSS_EVENT,
2084 GFP_KERNEL);
2085 }
04de8381 2086
b291ba11
JB		 2087 /*
2088 * The driver/our work has already reported this event or the
2089 * connection monitoring has kicked in and we have already sent
2090 * a probe request. Or maybe the AP died and the driver keeps
2091 * reporting until we disassociate...
2092 *
2093 * In either case we have to ignore the current call to this
2094 * function (except for setting the correct probe reason bit)
2095 * because otherwise we would reset the timer every time and
2096 * never check whether we received a probe response!
2097 */
392b9ffb 2098 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
b291ba11
JB		 2099 already = true;
2100
12b5f34d
EP		 2101 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2102
133d40f9
SG		 2103 mutex_unlock(&sdata->local->mtx);
2104
b291ba11
JB		 2105 if (already)
2106 goto out;
2107
4e751843
JB		 2108 mutex_lock(&sdata->local->iflist_mtx);
2109 ieee80211_recalc_ps(sdata->local, -1);
2110 mutex_unlock(&sdata->local->iflist_mtx);
2111
a43abf29
ML		 2112 ifmgd->probe_send_count = 0;
2113 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12 2114 out:
8d61ffa5 2115 sdata_unlock(sdata);
04de8381
KV		 2116}
2117
a619a4c0
JO		 2118struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2119 struct ieee80211_vif *vif)
2120{
2121 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2122 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d9b3b28b 2123 struct cfg80211_bss *cbss;
a619a4c0
JO		 2124 struct sk_buff *skb;
2125 const u8 *ssid;
88c868c4 2126 int ssid_len;
a619a4c0
JO		 2127
2128 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2129 return NULL;
2130
8d61ffa5 2131 sdata_assert_lock(sdata);
a619a4c0 2132
d9b3b28b
EP		 2133 if (ifmgd->associated)
2134 cbss = ifmgd->associated;
2135 else if (ifmgd->auth_data)
2136 cbss = ifmgd->auth_data->bss;
2137 else if (ifmgd->assoc_data)
2138 cbss = ifmgd->assoc_data->bss;
2139 else
a619a4c0
JO		 2140 return NULL;
2141
9caf0364 2142 rcu_read_lock();
d9b3b28b 2143 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
88c868c4
SG		 2144 if (WARN_ON_ONCE(ssid == NULL))
2145 ssid_len = 0;
2146 else
2147 ssid_len = ssid[1];
2148
d9b3b28b 2149 skb = ieee80211_build_probe_req(sdata, cbss->bssid,
55de908a 2150 (u32) -1, cbss->channel,
6b77863b 2151 ssid + 2, ssid_len,
85a237fe 2152 NULL, 0, true);
9caf0364 2153 rcu_read_unlock();
a619a4c0
JO		 2154
2155 return skb;
2156}
2157EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2158
eef9e54c 2159static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
1e4dcd01 2160{
59af6928 2161 struct ieee80211_local *local = sdata->local;
1e4dcd01 2162 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 2163 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
1e4dcd01 2164
8d61ffa5 2165 sdata_lock(sdata);
1e4dcd01 2166 if (!ifmgd->associated) {
8d61ffa5 2167 sdata_unlock(sdata);
1e4dcd01
JO		 2168 return;
2169 }
2170
37ad3888
JB		 2171 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2172 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
eef9e54c 2173 true, frame_buf);
59af6928 2174 mutex_lock(&local->mtx);
7578d575 2175 sdata->vif.csa_active = false;
a46992b4
LC		 2176 if (sdata->csa_block_tx) {
2177 ieee80211_wake_vif_queues(local, sdata,
2178 IEEE80211_QUEUE_STOP_REASON_CSA);
2179 sdata->csa_block_tx = false;
2180 }
59af6928 2181 mutex_unlock(&local->mtx);
7da7cc1d 2182
6ff57cf8
JB		 2183 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
2184 IEEE80211_DEAUTH_FRAME_LEN);
8d61ffa5 2185 sdata_unlock(sdata);
1e4dcd01
JO		 2186}
2187
cc74c0c7 2188static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 2189{
2190 struct ieee80211_sub_if_data *sdata =
2191 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 2192 u.mgd.beacon_connection_loss_work);
a85e1d55
PS		 2193 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2194 struct sta_info *sta;
2195
2196 if (ifmgd->associated) {
30fa9047 2197 rcu_read_lock();
a85e1d55
PS		 2198 sta = sta_info_get(sdata, ifmgd->bssid);
2199 if (sta)
2200 sta->beacon_loss_count++;
30fa9047 2201 rcu_read_unlock();
a85e1d55 2202 }
b291ba11 2203
682bd38b 2204 if (ifmgd->connection_loss) {
882a7c69
JB		 2205 sdata_info(sdata, "Connection to AP %pM lost\n",
2206 ifmgd->bssid);
eef9e54c 2207 __ieee80211_disconnect(sdata);
882a7c69 2208 } else {
1e4dcd01 2209 ieee80211_mgd_probe_ap(sdata, true);
882a7c69
JB		 2210 }
2211}
2212
2213static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2214{
2215 struct ieee80211_sub_if_data *sdata =
2216 container_of(work, struct ieee80211_sub_if_data,
2217 u.mgd.csa_connection_drop_work);
2218
eef9e54c 2219 __ieee80211_disconnect(sdata);
b291ba11
JB		 2220}
2221
04de8381
KV		 2222void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2223{
2224 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 2225 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 2226
b5878a2d
JB		 2227 trace_api_beacon_loss(sdata);
2228
682bd38b 2229 sdata->u.mgd.connection_loss = false;
1e4dcd01 2230 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 2231}
2232EXPORT_SYMBOL(ieee80211_beacon_loss);
2233
1e4dcd01
JO		 2234void ieee80211_connection_loss(struct ieee80211_vif *vif)
2235{
2236 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2237 struct ieee80211_hw *hw = &sdata->local->hw;
2238
b5878a2d
JB		 2239 trace_api_connection_loss(sdata);
2240
682bd38b 2241 sdata->u.mgd.connection_loss = true;
1e4dcd01
JO		 2242 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2243}
2244EXPORT_SYMBOL(ieee80211_connection_loss);
2245
2246
66e67e41
JB		 2247static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2248 bool assoc)
2249{
2250 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2251
8d61ffa5 2252 sdata_assert_lock(sdata);
66e67e41 2253
66e67e41
JB		 2254 if (!assoc) {
2255 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2256
2257 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2258 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
028e8da0 2259 sdata->u.mgd.flags = 0;
34a3740d 2260 mutex_lock(&sdata->local->mtx);
55de908a 2261 ieee80211_vif_release_channel(sdata);
34a3740d 2262 mutex_unlock(&sdata->local->mtx);
66e67e41
JB		 2263 }
2264
5b112d3d 2265 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
66e67e41
JB		 2266 kfree(auth_data);
2267 sdata->u.mgd.auth_data = NULL;
2268}
2269
2270static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2271 struct ieee80211_mgmt *mgmt, size_t len)
2272{
1672c0e3 2273 struct ieee80211_local *local = sdata->local;
66e67e41
JB		 2274 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2275 u8 *pos;
2276 struct ieee802_11_elems elems;
1672c0e3 2277 u32 tx_flags = 0;
66e67e41
JB		 2278
2279 pos = mgmt->u.auth.variable;
b2e506bf 2280 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
66e67e41
JB		 2281 if (!elems.challenge)
2282 return;
2283 auth_data->expected_transaction = 4;
a1845fc7 2284 drv_mgd_prepare_tx(sdata->local, sdata);
1672c0e3
JB		 2285 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2286 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2287 IEEE80211_TX_INTFL_MLME_CONN_TX;
700e8ea6 2288 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
66e67e41
JB		 2289 elems.challenge - 2, elems.challenge_len + 2,
2290 auth_data->bss->bssid, auth_data->bss->bssid,
2291 auth_data->key, auth_data->key_len,
1672c0e3 2292 auth_data->key_idx, tx_flags);
66e67e41
JB		 2293}
2294
8d61ffa5
JB		 2295static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2296 struct ieee80211_mgmt *mgmt, size_t len)
66e67e41
JB		 2297{
2298 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2299 u8 bssid[ETH_ALEN];
2300 u16 auth_alg, auth_transaction, status_code;
2301 struct sta_info *sta;
2302
8d61ffa5 2303 sdata_assert_lock(sdata);
66e67e41
JB		 2304
2305 if (len < 24 + 6)
8d61ffa5 2306 return;
66e67e41
JB		 2307
2308 if (!ifmgd->auth_data || ifmgd->auth_data->done)
8d61ffa5 2309 return;
66e67e41
JB		 2310
2311 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2312
b203ca39 2313 if (!ether_addr_equal(bssid, mgmt->bssid))
8d61ffa5 2314 return;
66e67e41
JB		 2315
2316 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2317 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2318 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2319
2320 if (auth_alg != ifmgd->auth_data->algorithm ||
0f4126e8
JM		 2321 auth_transaction != ifmgd->auth_data->expected_transaction) {
2322 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2323 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2324 auth_transaction,
2325 ifmgd->auth_data->expected_transaction);
8d61ffa5 2326 return;
0f4126e8 2327 }
66e67e41
JB		 2328
2329 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2330 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2331 mgmt->sa, status_code);
dac211ec 2332 ieee80211_destroy_auth_data(sdata, false);
6ff57cf8 2333 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
8d61ffa5 2334 return;
66e67e41
JB		 2335 }
2336
2337 switch (ifmgd->auth_data->algorithm) {
2338 case WLAN_AUTH_OPEN:
2339 case WLAN_AUTH_LEAP:
2340 case WLAN_AUTH_FT:
6b8ece3a 2341 case WLAN_AUTH_SAE:
66e67e41
JB		 2342 break;
2343 case WLAN_AUTH_SHARED_KEY:
2344 if (ifmgd->auth_data->expected_transaction != 4) {
2345 ieee80211_auth_challenge(sdata, mgmt, len);
2346 /* need another frame */
8d61ffa5 2347 return;
66e67e41
JB		 2348 }
2349 break;
2350 default:
2351 WARN_ONCE(1, "invalid auth alg %d",
2352 ifmgd->auth_data->algorithm);
8d61ffa5 2353 return;
66e67e41
JB		 2354 }
2355
bdcbd8e0 2356 sdata_info(sdata, "authenticated\n");
66e67e41
JB		 2357 ifmgd->auth_data->done = true;
2358 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
89afe614 2359 ifmgd->auth_data->timeout_started = true;
8d61ffa5 2360 run_again(sdata, ifmgd->auth_data->timeout);
66e67e41 2361
6b8ece3a
JM		 2362 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2363 ifmgd->auth_data->expected_transaction != 2) {
2364 /*
2365 * Report auth frame to user space for processing since another
2366 * round of Authentication frames is still needed.
2367 */
6ff57cf8 2368 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
8d61ffa5 2369 return;
6b8ece3a
JM		 2370 }
2371
66e67e41
JB		 2372 /* move station state to auth */
2373 mutex_lock(&sdata->local->sta_mtx);
2374 sta = sta_info_get(sdata, bssid);
2375 if (!sta) {
2376 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2377 goto out_err;
2378 }
2379 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
bdcbd8e0 2380 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
66e67e41
JB		 2381 goto out_err;
2382 }
2383 mutex_unlock(&sdata->local->sta_mtx);
2384
6ff57cf8 2385 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
8d61ffa5 2386 return;
66e67e41
JB		 2387 out_err:
2388 mutex_unlock(&sdata->local->sta_mtx);
2389 /* ignore frame -- wait for timeout */
66e67e41
JB		 2390}
2391
dfa1ad29
CO		 2392#define case_WLAN(type) \
2393 case WLAN_REASON_##type: return #type
2394
2395static const char *ieee80211_get_reason_code_string(u16 reason_code)
2396{
2397 switch (reason_code) {
2398 case_WLAN(UNSPECIFIED);
2399 case_WLAN(PREV_AUTH_NOT_VALID);
2400 case_WLAN(DEAUTH_LEAVING);
2401 case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2402 case_WLAN(DISASSOC_AP_BUSY);
2403 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2404 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2405 case_WLAN(DISASSOC_STA_HAS_LEFT);
2406 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2407 case_WLAN(DISASSOC_BAD_POWER);
2408 case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2409 case_WLAN(INVALID_IE);
2410 case_WLAN(MIC_FAILURE);
2411 case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2412 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2413 case_WLAN(IE_DIFFERENT);
2414 case_WLAN(INVALID_GROUP_CIPHER);
2415 case_WLAN(INVALID_PAIRWISE_CIPHER);
2416 case_WLAN(INVALID_AKMP);
2417 case_WLAN(UNSUPP_RSN_VERSION);
2418 case_WLAN(INVALID_RSN_IE_CAP);
2419 case_WLAN(IEEE8021X_FAILED);
2420 case_WLAN(CIPHER_SUITE_REJECTED);
2421 case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2422 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2423 case_WLAN(DISASSOC_LOW_ACK);
2424 case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2425 case_WLAN(QSTA_LEAVE_QBSS);
2426 case_WLAN(QSTA_NOT_USE);
2427 case_WLAN(QSTA_REQUIRE_SETUP);
2428 case_WLAN(QSTA_TIMEOUT);
2429 case_WLAN(QSTA_CIPHER_NOT_SUPP);
2430 case_WLAN(MESH_PEER_CANCELED);
2431 case_WLAN(MESH_MAX_PEERS);
2432 case_WLAN(MESH_CONFIG);
2433 case_WLAN(MESH_CLOSE);
2434 case_WLAN(MESH_MAX_RETRIES);
2435 case_WLAN(MESH_CONFIRM_TIMEOUT);
2436 case_WLAN(MESH_INVALID_GTK);
2437 case_WLAN(MESH_INCONSISTENT_PARAM);
2438 case_WLAN(MESH_INVALID_SECURITY);
2439 case_WLAN(MESH_PATH_ERROR);
2440 case_WLAN(MESH_PATH_NOFORWARD);
2441 case_WLAN(MESH_PATH_DEST_UNREACHABLE);
2442 case_WLAN(MAC_EXISTS_IN_MBSS);
2443 case_WLAN(MESH_CHAN_REGULATORY);
2444 case_WLAN(MESH_CHAN);
2445 default: return "<unknown>";
2446 }
2447}
66e67e41 2448
8d61ffa5
JB		 2449static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2450 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2451{
46900298 2452 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 2453 const u8 *bssid = NULL;
f0706e82
JB		 2454 u16 reason_code;
2455
8d61ffa5 2456 sdata_assert_lock(sdata);
66e67e41 2457
f4ea83dd 2458 if (len < 24 + 2)
8d61ffa5 2459 return;
f0706e82 2460
66e67e41 2461 if (!ifmgd->associated ||
b203ca39 2462 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
8d61ffa5 2463 return;
77fdaa12 2464
0c1ad2ca 2465 bssid = ifmgd->associated->bssid;
f0706e82
JB		 2466
2467 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2468
dfa1ad29
CO		 2469 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
2470 bssid, reason_code, ieee80211_get_reason_code_string(reason_code));
77fdaa12 2471
37ad3888
JB		 2472 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2473
6ff57cf8 2474 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
f0706e82
JB		 2475}
2476
2477
8d61ffa5
JB		 2478static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2479 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2480{
46900298 2481 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 2482 u16 reason_code;
2483
8d61ffa5 2484 sdata_assert_lock(sdata);
77fdaa12 2485
66e67e41 2486 if (len < 24 + 2)
8d61ffa5 2487 return;
77fdaa12 2488
66e67e41 2489 if (!ifmgd->associated ||
b203ca39 2490 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
8d61ffa5 2491 return;
f0706e82
JB		 2492
2493 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2494
bdcbd8e0
JB		 2495 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2496 mgmt->sa, reason_code);
f0706e82 2497
37ad3888
JB		 2498 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2499
6ff57cf8 2500 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
f0706e82
JB		 2501}
2502
c74d084f
CL		 2503static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2504 u8 *supp_rates, unsigned int supp_rates_len,
2505 u32 *rates, u32 *basic_rates,
2506 bool *have_higher_than_11mbit,
2103dec1
SW		 2507 int *min_rate, int *min_rate_index,
2508 int shift, u32 rate_flags)
c74d084f
CL		 2509{
2510 int i, j;
2511
2512 for (i = 0; i < supp_rates_len; i++) {
2103dec1 2513 int rate = supp_rates[i] & 0x7f;
c74d084f
CL		 2514 bool is_basic = !!(supp_rates[i] & 0x80);
2515
2103dec1 2516 if ((rate * 5 * (1 << shift)) > 110)
c74d084f
CL		 2517 *have_higher_than_11mbit = true;
2518
2519 /*
2520 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2521 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2522 *
2523 * Note: Even through the membership selector and the basic
2524 * rate flag share the same bit, they are not exactly
2525 * the same.
2526 */
2527 if (!!(supp_rates[i] & 0x80) &&
2528 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2529 continue;
2530
2531 for (j = 0; j < sband->n_bitrates; j++) {
2103dec1
SW		 2532 struct ieee80211_rate *br;
2533 int brate;
2534
2535 br = &sband->bitrates[j];
2536 if ((rate_flags & br->flags) != rate_flags)
2537 continue;
2538
2539 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2540 if (brate == rate) {
c74d084f
CL		 2541 *rates |= BIT(j);
2542 if (is_basic)
2543 *basic_rates |= BIT(j);
2103dec1
SW		 2544 if ((rate * 5) < *min_rate) {
2545 *min_rate = rate * 5;
c74d084f
CL		 2546 *min_rate_index = j;
2547 }
2548 break;
2549 }
2550 }
2551 }
2552}
f0706e82 2553
66e67e41
JB		 2554static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2555 bool assoc)
2556{
2557 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2558
8d61ffa5 2559 sdata_assert_lock(sdata);
66e67e41 2560
66e67e41
JB		 2561 if (!assoc) {
2562 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2563
2564 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2565 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
028e8da0 2566 sdata->u.mgd.flags = 0;
34a3740d 2567 mutex_lock(&sdata->local->mtx);
55de908a 2568 ieee80211_vif_release_channel(sdata);
34a3740d 2569 mutex_unlock(&sdata->local->mtx);
66e67e41
JB		 2570 }
2571
2572 kfree(assoc_data);
2573 sdata->u.mgd.assoc_data = NULL;
2574}
2575
2576static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2577 struct cfg80211_bss *cbss,
af6b6374 2578 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2579{
46900298 2580 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 2581 struct ieee80211_local *local = sdata->local;
8318d78a 2582 struct ieee80211_supported_band *sband;
f0706e82 2583 struct sta_info *sta;
af6b6374 2584 u8 *pos;
af6b6374 2585 u16 capab_info, aid;
f0706e82 2586 struct ieee802_11_elems elems;
bda3933a 2587 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
35d865af
JB		 2588 const struct cfg80211_bss_ies *bss_ies = NULL;
2589 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
ae5eb026 2590 u32 changed = 0;
c74d084f 2591 int err;
35d865af 2592 bool ret;
f0706e82 2593
af6b6374 2594 /* AssocResp and ReassocResp have identical structure */
f0706e82 2595
f0706e82 2596 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 2597 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 2598
1dd84aa2 2599 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
bdcbd8e0
JB		 2600 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2601 aid);
1dd84aa2
JB		 2602 aid &= ~(BIT(15) | BIT(14));
2603
05cb9108
JB		 2604 ifmgd->broken_ap = false;
2605
2606 if (aid == 0 || aid > IEEE80211_MAX_AID) {
bdcbd8e0
JB		 2607 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2608 aid);
05cb9108
JB		 2609 aid = 0;
2610 ifmgd->broken_ap = true;
2611 }
2612
af6b6374 2613 pos = mgmt->u.assoc_resp.variable;
b2e506bf 2614 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
af6b6374 2615
f0706e82 2616 if (!elems.supp_rates) {
bdcbd8e0 2617 sdata_info(sdata, "no SuppRates element in AssocResp\n");
af6b6374 2618 return false;
f0706e82
JB		 2619 }
2620
46900298 2621 ifmgd->aid = aid;
f0706e82 2622
35d865af
JB		 2623 /*
2624 * Some APs are erroneously not including some information in their
2625 * (re)association response frames. Try to recover by using the data
2626 * from the beacon or probe response. This seems to afflict mobile
2627 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2628 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2629 */
2630 if ((assoc_data->wmm && !elems.wmm_param) ||
2631 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2632 (!elems.ht_cap_elem || !elems.ht_operation)) ||
2633 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2634 (!elems.vht_cap_elem || !elems.vht_operation))) {
2635 const struct cfg80211_bss_ies *ies;
2636 struct ieee802_11_elems bss_elems;
2637
2638 rcu_read_lock();
2639 ies = rcu_dereference(cbss->ies);
2640 if (ies)
2641 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2642 GFP_ATOMIC);
2643 rcu_read_unlock();
2644 if (!bss_ies)
2645 return false;
2646
2647 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2648 false, &bss_elems);
2649 if (assoc_data->wmm &&
2650 !elems.wmm_param && bss_elems.wmm_param) {
2651 elems.wmm_param = bss_elems.wmm_param;
2652 sdata_info(sdata,
2653 "AP bug: WMM param missing from AssocResp\n");
2654 }
2655
2656 /*
2657 * Also check if we requested HT/VHT, otherwise the AP doesn't
2658 * have to include the IEs in the (re)association response.
2659 */
2660 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2661 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2662 elems.ht_cap_elem = bss_elems.ht_cap_elem;
2663 sdata_info(sdata,
2664 "AP bug: HT capability missing from AssocResp\n");
2665 }
2666 if (!elems.ht_operation && bss_elems.ht_operation &&
2667 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2668 elems.ht_operation = bss_elems.ht_operation;
2669 sdata_info(sdata,
2670 "AP bug: HT operation missing from AssocResp\n");
2671 }
2672 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2673 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2674 elems.vht_cap_elem = bss_elems.vht_cap_elem;
2675 sdata_info(sdata,
2676 "AP bug: VHT capa missing from AssocResp\n");
2677 }
2678 if (!elems.vht_operation && bss_elems.vht_operation &&
2679 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2680 elems.vht_operation = bss_elems.vht_operation;
2681 sdata_info(sdata,
2682 "AP bug: VHT operation missing from AssocResp\n");
2683 }
2684 }
2685
30eb1dc2
JB		 2686 /*
2687 * We previously checked these in the beacon/probe response, so
2688 * they should be present here. This is just a safety net.
2689 */
2690 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2691 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2692 sdata_info(sdata,
35d865af
JB		 2693 "HT AP is missing WMM params or HT capability/operation\n");
2694 ret = false;
2695 goto out;
30eb1dc2
JB		 2696 }
2697
2698 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2699 (!elems.vht_cap_elem || !elems.vht_operation)) {
2700 sdata_info(sdata,
35d865af
JB		 2701 "VHT AP is missing VHT capability/operation\n");
2702 ret = false;
2703 goto out;
30eb1dc2
JB		 2704 }
2705
2a33bee2
GE		 2706 mutex_lock(&sdata->local->sta_mtx);
2707 /*
2708 * station info was already allocated and inserted before
2709 * the association and should be available to us
2710 */
7852e361 2711 sta = sta_info_get(sdata, cbss->bssid);
2a33bee2
GE		 2712 if (WARN_ON(!sta)) {
2713 mutex_unlock(&sdata->local->sta_mtx);
35d865af
JB		 2714 ret = false;
2715 goto out;
77fdaa12 2716 }
05e5e883 2717
55de908a 2718 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
f709fc69 2719
30eb1dc2 2720 /* Set up internal HT/VHT capabilities */
a8243b72 2721 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
ef96a842 2722 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
e1a0c6b3 2723 elems.ht_cap_elem, sta);
64f68e5d 2724
818255ea
MP		 2725 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2726 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
4a34215e 2727 elems.vht_cap_elem, sta);
818255ea 2728
30eb1dc2
JB		 2729 /*
2730 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
2731 * in their association response, so ignore that data for our own
2732 * configuration. If it changed since the last beacon, we'll get the
2733 * next beacon and update then.
2734 */
1128958d 2735
bee7f586
JB		 2736 /*
2737 * If an operating mode notification IE is present, override the
2738 * NSS calculation (that would be done in rate_control_rate_init())
2739 * and use the # of streams from that element.
2740 */
2741 if (elems.opmode_notif &&
2742 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
2743 u8 nss;
2744
2745 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
2746 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
2747 nss += 1;
2748 sta->sta.rx_nss = nss;
2749 }
2750
4b7679a5 2751 rate_control_rate_init(sta);
f0706e82 2752
46900298 2753 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
c2c98fde 2754 set_sta_flag(sta, WLAN_STA_MFP);
5394af4d 2755
a74a8c84 2756 sta->sta.wme = elems.wmm_param;
ddf4ac53 2757
3e4d40fa 2758 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
c8987876
JB		 2759 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2760 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2761 if (err) {
bdcbd8e0
JB		 2762 sdata_info(sdata,
2763 "failed to move station %pM to desired state\n",
2764 sta->sta.addr);
c8987876
JB		 2765 WARN_ON(__sta_info_destroy(sta));
2766 mutex_unlock(&sdata->local->sta_mtx);
35d865af
JB		 2767 ret = false;
2768 goto out;
c8987876
JB		 2769 }
2770
7852e361 2771 mutex_unlock(&sdata->local->sta_mtx);
ddf4ac53 2772
f2176d72
JO		 2773 /*
2774 * Always handle WMM once after association regardless
2775 * of the first value the AP uses. Setting -1 here has
2776 * that effect because the AP values is an unsigned
2777 * 4-bit value.
2778 */
2779 ifmgd->wmm_last_param_set = -1;
2780
095d81ce 2781 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && elems.wmm_param)
4ced3f74 2782 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 2783 elems.wmm_param_len);
aa837e1d 2784 else
3abead59
JB		 2785 ieee80211_set_wmm_default(sdata, false);
2786 changed |= BSS_CHANGED_QOS;
f0706e82 2787
60f8b39c
JB		 2788 /* set AID and assoc capability,
2789 * ieee80211_set_associated() will tell the driver */
2790 bss_conf->aid = aid;
2791 bss_conf->assoc_capability = capab_info;
0c1ad2ca 2792 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 2793
d524215f
FF		 2794 /*
2795 * If we're using 4-addr mode, let the AP know that we're
2796 * doing so, so that it can create the STA VLAN on its side
2797 */
2798 if (ifmgd->use_4addr)
2799 ieee80211_send_4addr_nullfunc(local, sdata);
2800
15b7b062 2801 /*
b291ba11
JB		 2802 * Start timer to probe the connection to the AP now.
2803 * Also start the timer that will detect beacon loss.
15b7b062 2804 */
b291ba11 2805 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 2806 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 2807
35d865af
JB		 2808 ret = true;
2809 out:
2810 kfree(bss_ies);
2811 return ret;
f0706e82
JB		 2812}
2813
8d61ffa5
JB		 2814static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2815 struct ieee80211_mgmt *mgmt,
2816 size_t len)
66e67e41
JB		 2817{
2818 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2819 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2820 u16 capab_info, status_code, aid;
2821 struct ieee802_11_elems elems;
b0b6aa2c 2822 int ac, uapsd_queues = -1;
66e67e41
JB		 2823 u8 *pos;
2824 bool reassoc;
8d61ffa5 2825 struct cfg80211_bss *bss;
66e67e41 2826
8d61ffa5 2827 sdata_assert_lock(sdata);
66e67e41
JB		 2828
2829 if (!assoc_data)
8d61ffa5 2830 return;
b203ca39 2831 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
8d61ffa5 2832 return;
66e67e41
JB		 2833
2834 /*
2835 * AssocResp and ReassocResp have identical structure, so process both
2836 * of them in this function.
2837 */
2838
2839 if (len < 24 + 6)
8d61ffa5 2840 return;
66e67e41
JB		 2841
2842 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2843 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2844 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2845 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2846
bdcbd8e0
JB		 2847 sdata_info(sdata,
2848 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2849 reassoc ? "Rea" : "A", mgmt->sa,
2850 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
66e67e41
JB		 2851
2852 pos = mgmt->u.assoc_resp.variable;
b2e506bf 2853 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
66e67e41
JB		 2854
2855 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
79ba1d89
JB		 2856 elems.timeout_int &&
2857 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
66e67e41 2858 u32 tu, ms;
79ba1d89 2859 tu = le32_to_cpu(elems.timeout_int->value);
66e67e41 2860 ms = tu * 1024 / 1000;
bdcbd8e0
JB		 2861 sdata_info(sdata,
2862 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2863 mgmt->sa, tu, ms);
66e67e41 2864 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
89afe614 2865 assoc_data->timeout_started = true;
66e67e41 2866 if (ms > IEEE80211_ASSOC_TIMEOUT)
8d61ffa5
JB		 2867 run_again(sdata, assoc_data->timeout);
2868 return;
66e67e41
JB		 2869 }
2870
8d61ffa5 2871 bss = assoc_data->bss;
66e67e41
JB		 2872
2873 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2874 sdata_info(sdata, "%pM denied association (code=%d)\n",
2875 mgmt->sa, status_code);
66e67e41
JB		 2876 ieee80211_destroy_assoc_data(sdata, false);
2877 } else {
8d61ffa5 2878 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
66e67e41 2879 /* oops -- internal error -- send timeout for now */
10a9109f 2880 ieee80211_destroy_assoc_data(sdata, false);
959867fa 2881 cfg80211_assoc_timeout(sdata->dev, bss);
8d61ffa5 2882 return;
66e67e41 2883 }
635d999f 2884 sdata_info(sdata, "associated\n");
79ebfb85
JB		 2885
2886 /*
2887 * destroy assoc_data afterwards, as otherwise an idle
2888 * recalc after assoc_data is NULL but before associated
2889 * is set can cause the interface to go idle
2890 */
2891 ieee80211_destroy_assoc_data(sdata, true);
b0b6aa2c
EP		 2892
2893 /* get uapsd queues configuration */
2894 uapsd_queues = 0;
2895 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
2896 if (sdata->tx_conf[ac].uapsd)
2897 uapsd_queues |= BIT(ac);
66e67e41
JB		 2898 }
2899
b0b6aa2c 2900 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues);
66e67e41 2901}
8e3c1b77 2902
98c8fccf 2903static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
8e3c1b77 2904 struct ieee80211_mgmt *mgmt, size_t len,
98c8fccf 2905 struct ieee80211_rx_status *rx_status,
d45c4172 2906 struct ieee802_11_elems *elems)
98c8fccf
JB		 2907{
2908 struct ieee80211_local *local = sdata->local;
c2b13452 2909 struct ieee80211_bss *bss;
98c8fccf 2910 struct ieee80211_channel *channel;
56007a02 2911
8d61ffa5 2912 sdata_assert_lock(sdata);
b4f286a1 2913
3afc2167
EG		 2914 channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
2915 if (!channel)
98c8fccf
JB		 2916 return;
2917
98c8fccf 2918 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
d45c4172 2919 channel);
817cee76 2920 if (bss) {
817cee76 2921 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
d2722f8b 2922 ieee80211_rx_bss_put(local, bss);
817cee76 2923 }
f0706e82
JB		 2924}
2925
2926
f698d856 2927static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 2928 struct sk_buff *skb)
f0706e82 2929{
af6b6374 2930 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 2931 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 2932 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2933 size_t baselen, len = skb->len;
ae6a44e3
EK		 2934 struct ieee802_11_elems elems;
2935
15b7b062
KV		 2936 ifmgd = &sdata->u.mgd;
2937
8d61ffa5 2938 sdata_assert_lock(sdata);
77fdaa12 2939
b203ca39 2940 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
8e7cdbb6
TW		 2941 return; /* ignore ProbeResp to foreign address */
2942
ae6a44e3
EK		 2943 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2944 if (baselen > len)
2945 return;
2946
2947 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
b2e506bf 2948 false, &elems);
ae6a44e3 2949
d45c4172 2950 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
9859b81e 2951
77fdaa12 2952 if (ifmgd->associated &&
b203ca39 2953 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
4e5ff376 2954 ieee80211_reset_ap_probe(sdata);
66e67e41
JB		 2955
2956 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
b203ca39 2957 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
66e67e41 2958 /* got probe response, continue with auth */
bdcbd8e0 2959 sdata_info(sdata, "direct probe responded\n");
66e67e41
JB		 2960 ifmgd->auth_data->tries = 0;
2961 ifmgd->auth_data->timeout = jiffies;
89afe614 2962 ifmgd->auth_data->timeout_started = true;
8d61ffa5 2963 run_again(sdata, ifmgd->auth_data->timeout);
66e67e41 2964 }
f0706e82
JB		 2965}
2966
d91f36db
JB		 2967/*
2968 * This is the canonical list of information elements we care about,
2969 * the filter code also gives us all changes to the Microsoft OUI
c8d65917
SG		 2970 * (00:50:F2) vendor IE which is used for WMM which we need to track,
2971 * as well as the DTPC IE (part of the Cisco OUI) used for signaling
2972 * changes to requested client power.
d91f36db
JB		 2973 *
2974 * We implement beacon filtering in software since that means we can
2975 * avoid processing the frame here and in cfg80211, and userspace
2976 * will not be able to tell whether the hardware supports it or not.
2977 *
2978 * XXX: This list needs to be dynamic -- userspace needs to be able to
2979 * add items it requires. It also needs to be able to tell us to
2980 * look out for other vendor IEs.
2981 */
2982static const u64 care_about_ies =
1d4df3a5
JB		 2983 (1ULL << WLAN_EID_COUNTRY) |
2984 (1ULL << WLAN_EID_ERP_INFO) |
2985 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2986 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2987 (1ULL << WLAN_EID_HT_CAPABILITY) |
074d46d1 2988 (1ULL << WLAN_EID_HT_OPERATION);
d91f36db 2989
8d61ffa5
JB		 2990static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
2991 struct ieee80211_mgmt *mgmt, size_t len,
2992 struct ieee80211_rx_status *rx_status)
f0706e82 2993{
d91f36db 2994 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 2995 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 2996 size_t baselen;
2997 struct ieee802_11_elems elems;
f698d856 2998 struct ieee80211_local *local = sdata->local;
55de908a
JB		 2999 struct ieee80211_chanctx_conf *chanctx_conf;
3000 struct ieee80211_channel *chan;
bee7f586 3001 struct sta_info *sta;
471b3efd 3002 u32 changed = 0;
f87ad637 3003 bool erp_valid;
7a5158ef 3004 u8 erp_value = 0;
d91f36db 3005 u32 ncrc;
77fdaa12 3006 u8 *bssid;
8d61ffa5 3007 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
77fdaa12 3008
8d61ffa5 3009 sdata_assert_lock(sdata);
f0706e82 3010
ae6a44e3
EK		 3011 /* Process beacon from the current BSS */
3012 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3013 if (baselen > len)
8d61ffa5 3014 return;
ae6a44e3 3015
55de908a
JB		 3016 rcu_read_lock();
3017 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3018 if (!chanctx_conf) {
3019 rcu_read_unlock();
8d61ffa5 3020 return;
55de908a
JB		 3021 }
3022
4bf88530 3023 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
55de908a 3024 rcu_read_unlock();
8d61ffa5 3025 return;
55de908a 3026 }
4bf88530 3027 chan = chanctx_conf->def.chan;
55de908a 3028 rcu_read_unlock();
f0706e82 3029
c65dd147 3030 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
b203ca39 3031 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
66e67e41 3032 ieee802_11_parse_elems(mgmt->u.beacon.variable,
b2e506bf 3033 len - baselen, false, &elems);
77fdaa12 3034
d45c4172 3035 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
482a9c74
AB		 3036 if (elems.tim && !elems.parse_error) {
3037 const struct ieee80211_tim_ie *tim_ie = elems.tim;
3038 ifmgd->dtim_period = tim_ie->dtim_period;
3039 }
989c6505 3040 ifmgd->have_beacon = true;
c65dd147 3041 ifmgd->assoc_data->need_beacon = false;
ef429dad
JB		 3042 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3043 sdata->vif.bss_conf.sync_tsf =
3044 le64_to_cpu(mgmt->u.beacon.timestamp);
3045 sdata->vif.bss_conf.sync_device_ts =
3046 rx_status->device_timestamp;
3047 if (elems.tim)
3048 sdata->vif.bss_conf.sync_dtim_count =
3049 elems.tim->dtim_count;
3050 else
3051 sdata->vif.bss_conf.sync_dtim_count = 0;
3052 }
66e67e41
JB		 3053 /* continue assoc process */
3054 ifmgd->assoc_data->timeout = jiffies;
89afe614 3055 ifmgd->assoc_data->timeout_started = true;
8d61ffa5
JB		 3056 run_again(sdata, ifmgd->assoc_data->timeout);
3057 return;
66e67e41 3058 }
77fdaa12 3059
66e67e41 3060 if (!ifmgd->associated ||
b203ca39 3061 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
8d61ffa5 3062 return;
66e67e41 3063 bssid = ifmgd->associated->bssid;
f0706e82 3064
17e4ec14
JM		 3065 /* Track average RSSI from the Beacon frames of the current AP */
3066 ifmgd->last_beacon_signal = rx_status->signal;
3067 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3068 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3ba06c6f 3069 ifmgd->ave_beacon_signal = rx_status->signal * 16;
17e4ec14 3070 ifmgd->last_cqm_event_signal = 0;
391a200a 3071 ifmgd->count_beacon_signal = 1;
615f7b9b 3072 ifmgd->last_ave_beacon_signal = 0;
17e4ec14
JM		 3073 } else {
3074 ifmgd->ave_beacon_signal =
3075 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
3076 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
3077 ifmgd->ave_beacon_signal) / 16;
391a200a 3078 ifmgd->count_beacon_signal++;
17e4ec14 3079 }
615f7b9b
MV		 3080
3081 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3082 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3083 int sig = ifmgd->ave_beacon_signal;
3084 int last_sig = ifmgd->last_ave_beacon_signal;
3085
3086 /*
3087 * if signal crosses either of the boundaries, invoke callback
3088 * with appropriate parameters
3089 */
3090 if (sig > ifmgd->rssi_max_thold &&
3091 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3092 ifmgd->last_ave_beacon_signal = sig;
887da917 3093 drv_rssi_callback(local, sdata, RSSI_EVENT_HIGH);
615f7b9b
MV		 3094 } else if (sig < ifmgd->rssi_min_thold &&
3095 (last_sig >= ifmgd->rssi_max_thold ||
3096 last_sig == 0)) {
3097 ifmgd->last_ave_beacon_signal = sig;
887da917 3098 drv_rssi_callback(local, sdata, RSSI_EVENT_LOW);
615f7b9b
MV		 3099 }
3100 }
3101
17e4ec14 3102 if (bss_conf->cqm_rssi_thold &&
391a200a 3103 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
ea086359 3104 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
17e4ec14
JM		 3105 int sig = ifmgd->ave_beacon_signal / 16;
3106 int last_event = ifmgd->last_cqm_event_signal;
3107 int thold = bss_conf->cqm_rssi_thold;
3108 int hyst = bss_conf->cqm_rssi_hyst;
3109 if (sig < thold &&
3110 (last_event == 0 || sig < last_event - hyst)) {
3111 ifmgd->last_cqm_event_signal = sig;
3112 ieee80211_cqm_rssi_notify(
3113 &sdata->vif,
3114 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3115 GFP_KERNEL);
3116 } else if (sig > thold &&
3117 (last_event == 0 || sig > last_event + hyst)) {
3118 ifmgd->last_cqm_event_signal = sig;
3119 ieee80211_cqm_rssi_notify(
3120 &sdata->vif,
3121 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3122 GFP_KERNEL);
3123 }
3124 }
3125
392b9ffb 3126 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
bdcbd8e0 3127 mlme_dbg_ratelimited(sdata,
112c31f0 3128 "cancelling AP probe due to a received beacon\n");
392b9ffb 3129 ieee80211_reset_ap_probe(sdata);
92778180
JM		 3130 }
3131
b291ba11
JB		 3132 /*
3133 * Push the beacon loss detection into the future since
3134 * we are processing a beacon from the AP just now.
3135 */
d3a910a8 3136 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 3137
d91f36db
JB		 3138 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3139 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
b2e506bf 3140 len - baselen, false, &elems,
d91f36db
JB		 3141 care_about_ies, ncrc);
3142
25c9c875 3143 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
f87ad637
RR		 3144 bool directed_tim = ieee80211_check_tim(elems.tim,
3145 elems.tim_len,
3146 ifmgd->aid);
1fb3606b 3147 if (directed_tim) {
572e0012 3148 if (local->hw.conf.dynamic_ps_timeout > 0) {
70b12f26
RW		 3149 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3150 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3151 ieee80211_hw_config(local,
3152 IEEE80211_CONF_CHANGE_PS);
3153 }
572e0012 3154 ieee80211_send_nullfunc(local, sdata, 0);
6f0756a3 3155 } else if (!local->pspolling && sdata->u.mgd.powersave) {
572e0012
KV		 3156 local->pspolling = true;
3157
3158 /*
3159 * Here is assumed that the driver will be
3160 * able to send ps-poll frame and receive a
3161 * response even though power save mode is
3162 * enabled, but some drivers might require
3163 * to disable power save here. This needs
3164 * to be investigated.
3165 */
3166 ieee80211_send_pspoll(local, sdata);
3167 }
a97b77b9
VN		 3168 }
3169 }
7a5158ef 3170
488dd7b5 3171 if (sdata->vif.p2p) {
67baf663 3172 struct ieee80211_p2p_noa_attr noa = {};
488dd7b5
JB		 3173 int ret;
3174
3175 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3176 len - baselen,
3177 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
934457ee 3178 (u8 *) &noa, sizeof(noa));
67baf663
JD		 3179 if (ret >= 2) {
3180 if (sdata->u.mgd.p2p_noa_index != noa.index) {
3181 /* valid noa_attr and index changed */
3182 sdata->u.mgd.p2p_noa_index = noa.index;
3183 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3184 changed |= BSS_CHANGED_P2P_PS;
3185 /*
3186 * make sure we update all information, the CRC
3187 * mechanism doesn't look at P2P attributes.
3188 */
3189 ifmgd->beacon_crc_valid = false;
3190 }
3191 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3192 /* noa_attr not found and we had valid noa_attr before */
3193 sdata->u.mgd.p2p_noa_index = -1;
3194 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
488dd7b5 3195 changed |= BSS_CHANGED_P2P_PS;
488dd7b5
JB		 3196 ifmgd->beacon_crc_valid = false;
3197 }
3198 }
3199
d8ec4433 3200 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
8d61ffa5 3201 return;
30196673 3202 ifmgd->beacon_crc = ncrc;
d8ec4433 3203 ifmgd->beacon_crc_valid = true;
30196673 3204
d45c4172 3205 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
7d25745d 3206
d70b7616 3207 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
2ba45384 3208 rx_status->device_timestamp,
d70b7616
JB		 3209 &elems, true);
3210
095d81ce
JB		 3211 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3212 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
7d25745d
JB		 3213 elems.wmm_param_len))
3214 changed |= BSS_CHANGED_QOS;
3215
c65dd147
EG		 3216 /*
3217 * If we haven't had a beacon before, tell the driver about the
ef429dad 3218 * DTIM period (and beacon timing if desired) now.
c65dd147 3219 */
989c6505 3220 if (!ifmgd->have_beacon) {
c65dd147
EG		 3221 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3222 if (elems.tim)
3223 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3224 else
3225 bss_conf->dtim_period = 1;
ef429dad
JB		 3226
3227 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3228 sdata->vif.bss_conf.sync_tsf =
3229 le64_to_cpu(mgmt->u.beacon.timestamp);
3230 sdata->vif.bss_conf.sync_device_ts =
3231 rx_status->device_timestamp;
3232 if (elems.tim)
3233 sdata->vif.bss_conf.sync_dtim_count =
3234 elems.tim->dtim_count;
3235 else
3236 sdata->vif.bss_conf.sync_dtim_count = 0;
3237 }
3238
989c6505
AB		 3239 changed |= BSS_CHANGED_BEACON_INFO;
3240 ifmgd->have_beacon = true;
482a9c74
AB		 3241
3242 mutex_lock(&local->iflist_mtx);
3243 ieee80211_recalc_ps(local, -1);
3244 mutex_unlock(&local->iflist_mtx);
3245
ce857888 3246 ieee80211_recalc_ps_vif(sdata);
c65dd147
EG		 3247 }
3248
1946bed9 3249 if (elems.erp_info) {
7a5158ef
JB		 3250 erp_valid = true;
3251 erp_value = elems.erp_info[0];
3252 } else {
3253 erp_valid = false;
50c4afb9 3254 }
7a5158ef
JB		 3255 changed |= ieee80211_handle_bss_capability(sdata,
3256 le16_to_cpu(mgmt->u.beacon.capab_info),
3257 erp_valid, erp_value);
f0706e82 3258
1128958d 3259 mutex_lock(&local->sta_mtx);
bee7f586
JB		 3260 sta = sta_info_get(sdata, bssid);
3261
53b954ee
EP		 3262 if (ieee80211_config_bw(sdata, sta,
3263 elems.ht_cap_elem, elems.ht_operation,
30eb1dc2
JB		 3264 elems.vht_operation, bssid, &changed)) {
3265 mutex_unlock(&local->sta_mtx);
3266 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3267 WLAN_REASON_DEAUTH_LEAVING,
3268 true, deauth_buf);
6ff57cf8
JB		 3269 cfg80211_tx_mlme_mgmt(sdata->dev, deauth_buf,
3270 sizeof(deauth_buf));
8d61ffa5 3271 return;
30eb1dc2 3272 }
bee7f586
JB		 3273
3274 if (sta && elems.opmode_notif)
3275 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3276 rx_status->band, true);
1128958d 3277 mutex_unlock(&local->sta_mtx);
d3c990fb 3278
24a4e400
SG		 3279 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
3280 elems.country_elem,
3281 elems.country_elem_len,
c8d65917
SG		 3282 elems.pwr_constr_elem,
3283 elems.cisco_dtpc_elem);
3f2355cb 3284
471b3efd 3285 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 3286}
3287
1fa57d01
JB		 3288void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3289 struct sk_buff *skb)
f0706e82
JB		 3290{
3291 struct ieee80211_rx_status *rx_status;
f0706e82
JB		 3292 struct ieee80211_mgmt *mgmt;
3293 u16 fc;
1b3a2e49
JB		 3294 struct ieee802_11_elems elems;
3295 int ies_len;
f0706e82 3296
f0706e82
JB		 3297 rx_status = (struct ieee80211_rx_status *) skb->cb;
3298 mgmt = (struct ieee80211_mgmt *) skb->data;
3299 fc = le16_to_cpu(mgmt->frame_control);
3300
8d61ffa5 3301 sdata_lock(sdata);
77fdaa12 3302
66e67e41
JB		 3303 switch (fc & IEEE80211_FCTL_STYPE) {
3304 case IEEE80211_STYPE_BEACON:
8d61ffa5 3305 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
66e67e41
JB		 3306 break;
3307 case IEEE80211_STYPE_PROBE_RESP:
3308 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3309 break;
3310 case IEEE80211_STYPE_AUTH:
8d61ffa5 3311 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
66e67e41
JB		 3312 break;
3313 case IEEE80211_STYPE_DEAUTH:
8d61ffa5 3314 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
66e67e41
JB		 3315 break;
3316 case IEEE80211_STYPE_DISASSOC:
8d61ffa5 3317 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
66e67e41
JB		 3318 break;
3319 case IEEE80211_STYPE_ASSOC_RESP:
3320 case IEEE80211_STYPE_REASSOC_RESP:
8d61ffa5 3321 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
66e67e41
JB		 3322 break;
3323 case IEEE80211_STYPE_ACTION:
37799e52 3324 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
1b3a2e49
JB		 3325 ies_len = skb->len -
3326 offsetof(struct ieee80211_mgmt,
3327 u.action.u.chan_switch.variable);
37799e52
JB		 3328
3329 if (ies_len < 0)
3330 break;
3331
3332 ieee802_11_parse_elems(
3333 mgmt->u.action.u.chan_switch.variable,
b2e506bf 3334 ies_len, true, &elems);
37799e52
JB		 3335
3336 if (elems.parse_error)
3337 break;
3338
1b3a2e49 3339 ieee80211_sta_process_chanswitch(sdata,
2ba45384
LC		 3340 rx_status->mactime,
3341 rx_status->device_timestamp,
3342 &elems, false);
1b3a2e49
JB		 3343 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3344 ies_len = skb->len -
3345 offsetof(struct ieee80211_mgmt,
3346 u.action.u.ext_chan_switch.variable);
3347
3348 if (ies_len < 0)
3349 break;
3350
3351 ieee802_11_parse_elems(
3352 mgmt->u.action.u.ext_chan_switch.variable,
b2e506bf 3353 ies_len, true, &elems);
1b3a2e49
JB		 3354
3355 if (elems.parse_error)
3356 break;
3357
3358 /* for the handling code pretend this was also an IE */
3359 elems.ext_chansw_ie =
3360 &mgmt->u.action.u.ext_chan_switch.data;
3361
66e67e41 3362 ieee80211_sta_process_chanswitch(sdata,
2ba45384
LC		 3363 rx_status->mactime,
3364 rx_status->device_timestamp,
3365 &elems, false);
77fdaa12 3366 }
37799e52 3367 break;
77fdaa12 3368 }
8d61ffa5 3369 sdata_unlock(sdata);
f0706e82
JB		 3370}
3371
9c6bd790 3372static void ieee80211_sta_timer(unsigned long data)
f0706e82 3373{
60f8b39c
JB		 3374 struct ieee80211_sub_if_data *sdata =
3375 (struct ieee80211_sub_if_data *) data;
5bb644a0 3376
9b7d72c1 3377 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
f0706e82
JB		 3378}
3379
04ac3c0e 3380static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
6b684db1 3381 u8 *bssid, u8 reason, bool tx)
04ac3c0e 3382{
6ae16775 3383 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
04ac3c0e 3384
37ad3888 3385 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
6b684db1 3386 tx, frame_buf);
37ad3888 3387
6ff57cf8
JB		 3388 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3389 IEEE80211_DEAUTH_FRAME_LEN);
04ac3c0e
FF		 3390}
3391
66e67e41
JB		 3392static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
3393{
3394 struct ieee80211_local *local = sdata->local;
3395 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3396 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
1672c0e3 3397 u32 tx_flags = 0;
66e67e41 3398
8d61ffa5 3399 sdata_assert_lock(sdata);
66e67e41
JB		 3400
3401 if (WARN_ON_ONCE(!auth_data))
3402 return -EINVAL;
3403
66e67e41
JB		 3404 auth_data->tries++;
3405
3406 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
bdcbd8e0
JB		 3407 sdata_info(sdata, "authentication with %pM timed out\n",
3408 auth_data->bss->bssid);
66e67e41
JB		 3409
3410 /*
3411 * Most likely AP is not in the range so remove the
3412 * bss struct for that AP.
3413 */
3414 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3415
3416 return -ETIMEDOUT;
3417 }
3418
a1845fc7
JB		 3419 drv_mgd_prepare_tx(local, sdata);
3420
66e67e41 3421 if (auth_data->bss->proberesp_ies) {
6b8ece3a
JM		 3422 u16 trans = 1;
3423 u16 status = 0;
3424
bdcbd8e0
JB		 3425 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3426 auth_data->bss->bssid, auth_data->tries,
3427 IEEE80211_AUTH_MAX_TRIES);
66e67e41
JB		 3428
3429 auth_data->expected_transaction = 2;
6b8ece3a
JM		 3430
3431 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3432 trans = auth_data->sae_trans;
3433 status = auth_data->sae_status;
3434 auth_data->expected_transaction = trans;
3435 }
3436
6211dd12
SG		 3437 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3438 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3439 IEEE80211_TX_INTFL_MLME_CONN_TX;
3440
6b8ece3a
JM		 3441 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3442 auth_data->data, auth_data->data_len,
66e67e41 3443 auth_data->bss->bssid,
1672c0e3
JB		 3444 auth_data->bss->bssid, NULL, 0, 0,
3445 tx_flags);
66e67e41
JB		 3446 } else {
3447 const u8 *ssidie;
3448
bdcbd8e0
JB		 3449 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
3450 auth_data->bss->bssid, auth_data->tries,
3451 IEEE80211_AUTH_MAX_TRIES);
66e67e41 3452
9caf0364 3453 rcu_read_lock();
66e67e41 3454 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
9caf0364
JB		 3455 if (!ssidie) {
3456 rcu_read_unlock();
66e67e41 3457 return -EINVAL;
9caf0364 3458 }
66e67e41
JB		 3459 /*
3460 * Direct probe is sent to broadcast address as some APs
3461 * will not answer to direct packet in unassociated state.
3462 */
3463 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
6211dd12 3464 NULL, 0, (u32) -1, true, 0,
55de908a 3465 auth_data->bss->channel, false);
9caf0364 3466 rcu_read_unlock();
66e67e41
JB		 3467 }
3468
6211dd12 3469 if (tx_flags == 0) {
1672c0e3 3470 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
cb236d2d 3471 auth_data->timeout_started = true;
8d61ffa5 3472 run_again(sdata, auth_data->timeout);
89afe614 3473 } else {
cb236d2d
JB		 3474 auth_data->timeout =
3475 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3476 auth_data->timeout_started = true;
3477 run_again(sdata, auth_data->timeout);
1672c0e3 3478 }
66e67e41
JB		 3479
3480 return 0;
3481}
3482
3483static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3484{
3485 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3486 struct ieee80211_local *local = sdata->local;
3487
8d61ffa5 3488 sdata_assert_lock(sdata);
66e67e41 3489
66e67e41
JB		 3490 assoc_data->tries++;
3491 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
bdcbd8e0
JB		 3492 sdata_info(sdata, "association with %pM timed out\n",
3493 assoc_data->bss->bssid);
66e67e41
JB		 3494
3495 /*
3496 * Most likely AP is not in the range so remove the
3497 * bss struct for that AP.
3498 */
3499 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3500
3501 return -ETIMEDOUT;
3502 }
3503
bdcbd8e0
JB		 3504 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3505 assoc_data->bss->bssid, assoc_data->tries,
3506 IEEE80211_ASSOC_MAX_TRIES);
66e67e41
JB		 3507 ieee80211_send_assoc(sdata);
3508
1672c0e3
JB		 3509 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
3510 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
89afe614 3511 assoc_data->timeout_started = true;
8d61ffa5 3512 run_again(sdata, assoc_data->timeout);
89afe614 3513 } else {
cb236d2d
JB		 3514 assoc_data->timeout =
3515 round_jiffies_up(jiffies +
3516 IEEE80211_ASSOC_TIMEOUT_LONG);
3517 assoc_data->timeout_started = true;
3518 run_again(sdata, assoc_data->timeout);
1672c0e3 3519 }
66e67e41
JB		 3520
3521 return 0;
3522}
3523
1672c0e3
JB		 3524void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3525 __le16 fc, bool acked)
3526{
3527 struct ieee80211_local *local = sdata->local;
3528
3529 sdata->u.mgd.status_fc = fc;
3530 sdata->u.mgd.status_acked = acked;
3531 sdata->u.mgd.status_received = true;
3532
3533 ieee80211_queue_work(&local->hw, &sdata->work);
3534}
3535
1fa57d01 3536void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 3537{
9c6bd790 3538 struct ieee80211_local *local = sdata->local;
1fa57d01 3539 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 3540
8d61ffa5 3541 sdata_lock(sdata);
77fdaa12 3542
1672c0e3
JB		 3543 if (ifmgd->status_received) {
3544 __le16 fc = ifmgd->status_fc;
3545 bool status_acked = ifmgd->status_acked;
3546
3547 ifmgd->status_received = false;
3548 if (ifmgd->auth_data &&
3549 (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) {
3550 if (status_acked) {
3551 ifmgd->auth_data->timeout =
3552 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
8d61ffa5 3553 run_again(sdata, ifmgd->auth_data->timeout);
1672c0e3
JB		 3554 } else {
3555 ifmgd->auth_data->timeout = jiffies - 1;
3556 }
89afe614 3557 ifmgd->auth_data->timeout_started = true;
1672c0e3
JB		 3558 } else if (ifmgd->assoc_data &&
3559 (ieee80211_is_assoc_req(fc) ||
3560 ieee80211_is_reassoc_req(fc))) {
3561 if (status_acked) {
3562 ifmgd->assoc_data->timeout =
3563 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
8d61ffa5 3564 run_again(sdata, ifmgd->assoc_data->timeout);
1672c0e3
JB		 3565 } else {
3566 ifmgd->assoc_data->timeout = jiffies - 1;
3567 }
89afe614 3568 ifmgd->assoc_data->timeout_started = true;
1672c0e3
JB		 3569 }
3570 }
3571
89afe614 3572 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
66e67e41
JB		 3573 time_after(jiffies, ifmgd->auth_data->timeout)) {
3574 if (ifmgd->auth_data->done) {
3575 /*
3576 * ok ... we waited for assoc but userspace didn't,
3577 * so let's just kill the auth data
3578 */
3579 ieee80211_destroy_auth_data(sdata, false);
3580 } else if (ieee80211_probe_auth(sdata)) {
3581 u8 bssid[ETH_ALEN];
3582
3583 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3584
3585 ieee80211_destroy_auth_data(sdata, false);
3586
6ff57cf8 3587 cfg80211_auth_timeout(sdata->dev, bssid);
66e67e41 3588 }
89afe614 3589 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
8d61ffa5 3590 run_again(sdata, ifmgd->auth_data->timeout);
66e67e41 3591
89afe614 3592 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
66e67e41 3593 time_after(jiffies, ifmgd->assoc_data->timeout)) {
989c6505 3594 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
66e67e41 3595 ieee80211_do_assoc(sdata)) {
959867fa 3596 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
66e67e41
JB		 3597
3598 ieee80211_destroy_assoc_data(sdata, false);
959867fa 3599 cfg80211_assoc_timeout(sdata->dev, bss);
66e67e41 3600 }
89afe614 3601 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
8d61ffa5 3602 run_again(sdata, ifmgd->assoc_data->timeout);
66e67e41 3603
392b9ffb 3604 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
b291ba11 3605 ifmgd->associated) {
a43abf29 3606 u8 bssid[ETH_ALEN];
72a8a3ed 3607 int max_tries;
a43abf29 3608
0c1ad2ca 3609 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 3610
72a8a3ed 3611 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
180205bd 3612 max_tries = max_nullfunc_tries;
72a8a3ed 3613 else
180205bd 3614 max_tries = max_probe_tries;
72a8a3ed 3615
4e5ff376
FF		 3616 /* ACK received for nullfunc probing frame */
3617 if (!ifmgd->probe_send_count)
3618 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 3619 else if (ifmgd->nullfunc_failed) {
3620 if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3621 mlme_dbg(sdata,
3622 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3623 bssid, ifmgd->probe_send_count,
3624 max_tries);
04ac3c0e
FF		 3625 ieee80211_mgd_probe_ap_send(sdata);
3626 } else {
bdcbd8e0
JB		 3627 mlme_dbg(sdata,
3628 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3629 bssid);
95acac61 3630 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1
JB		 3631 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3632 false);
04ac3c0e
FF		 3633 }
3634 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
8d61ffa5 3635 run_again(sdata, ifmgd->probe_timeout);
04ac3c0e 3636 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
bdcbd8e0
JB		 3637 mlme_dbg(sdata,
3638 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3639 bssid, probe_wait_ms);
95acac61 3640 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 3641 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
04ac3c0e 3642 } else if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3643 mlme_dbg(sdata,
3644 "No probe response from AP %pM after %dms, try %d/%i\n",
3645 bssid, probe_wait_ms,
3646 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 3647 ieee80211_mgd_probe_ap_send(sdata);
3648 } else {
b291ba11
JB		 3649 /*
3650 * We actually lost the connection ... or did we?
3651 * Let's make sure!
3652 */
b38afa87
BG		 3653 wiphy_debug(local->hw.wiphy,
3654 "%s: No probe response from AP %pM"
3655 " after %dms, disconnecting.\n",
3656 sdata->name,
180205bd 3657 bssid, probe_wait_ms);
04ac3c0e 3658
95acac61 3659 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 3660 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
b291ba11
JB		 3661 }
3662 }
3663
8d61ffa5 3664 sdata_unlock(sdata);
f0706e82
JB		 3665}
3666
b291ba11
JB		 3667static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3668{
3669 struct ieee80211_sub_if_data *sdata =
3670 (struct ieee80211_sub_if_data *) data;
3671 struct ieee80211_local *local = sdata->local;
3672
3673 if (local->quiescing)
3674 return;
3675
e5593f56
MK		 3676 if (sdata->vif.csa_active)
3677 return;
3678
682bd38b 3679 sdata->u.mgd.connection_loss = false;
1e4dcd01
JO		 3680 ieee80211_queue_work(&sdata->local->hw,
3681 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 3682}
3683
3684static void ieee80211_sta_conn_mon_timer(unsigned long data)
3685{
3686 struct ieee80211_sub_if_data *sdata =
3687 (struct ieee80211_sub_if_data *) data;
3688 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3689 struct ieee80211_local *local = sdata->local;
3690
3691 if (local->quiescing)
3692 return;
3693
e5593f56
MK		 3694 if (sdata->vif.csa_active)
3695 return;
3696
42935eca 3697 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 3698}
3699
3700static void ieee80211_sta_monitor_work(struct work_struct *work)
3701{
3702 struct ieee80211_sub_if_data *sdata =
3703 container_of(work, struct ieee80211_sub_if_data,
3704 u.mgd.monitor_work);
3705
3706 ieee80211_mgd_probe_ap(sdata, false);
3707}
3708
9c6bd790
JB		 3709static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3710{
494f1fe5
EP		 3711 u32 flags;
3712
ad935687 3713 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
925e64c3 3714 __ieee80211_stop_poll(sdata);
ad935687 3715
b291ba11 3716 /* let's probe the connection once */
494f1fe5
EP		 3717 flags = sdata->local->hw.flags;
3718 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3719 ieee80211_queue_work(&sdata->local->hw,
3720 &sdata->u.mgd.monitor_work);
b291ba11 3721 /* and do all the other regular work too */
64592c8f 3722 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 3723 }
9c6bd790 3724}
f0706e82 3725
b8360ab8 3726#ifdef CONFIG_PM
1a1cb744
JB		 3727void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
3728{
3729 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3730 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3731
3732 sdata_lock(sdata);
3733
c52666ae
EG		 3734 if (ifmgd->auth_data || ifmgd->assoc_data) {
3735 const u8 *bssid = ifmgd->auth_data ?
3736 ifmgd->auth_data->bss->bssid :
3737 ifmgd->assoc_data->bss->bssid;
3738
1a1cb744 3739 /*
c52666ae
EG		 3740 * If we are trying to authenticate / associate while suspending,
3741 * cfg80211 won't know and won't actually abort those attempts,
3742 * thus we need to do that ourselves.
1a1cb744 3743 */
c52666ae 3744 ieee80211_send_deauth_disassoc(sdata, bssid,
1a1cb744
JB		 3745 IEEE80211_STYPE_DEAUTH,
3746 WLAN_REASON_DEAUTH_LEAVING,
3747 false, frame_buf);
c52666ae
EG		 3748 if (ifmgd->assoc_data)
3749 ieee80211_destroy_assoc_data(sdata, false);
3750 if (ifmgd->auth_data)
3751 ieee80211_destroy_auth_data(sdata, false);
1a1cb744
JB		 3752 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3753 IEEE80211_DEAUTH_FRAME_LEN);
3754 }
3755
3756 sdata_unlock(sdata);
3757}
3758
b8360ab8
JB		 3759void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
3760{
3761 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3762
8d61ffa5 3763 sdata_lock(sdata);
b8360ab8 3764 if (!ifmgd->associated) {
8d61ffa5 3765 sdata_unlock(sdata);
b8360ab8
JB		 3766 return;
3767 }
3768
3769 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
3770 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
3771 mlme_dbg(sdata, "driver requested disconnect after resume\n");
3772 ieee80211_sta_connection_lost(sdata,
3773 ifmgd->associated->bssid,
3774 WLAN_REASON_UNSPECIFIED,
3775 true);
8d61ffa5 3776 sdata_unlock(sdata);
b8360ab8
JB		 3777 return;
3778 }
8d61ffa5 3779 sdata_unlock(sdata);
b8360ab8
JB		 3780}
3781#endif
3782
9c6bd790
JB		 3783/* interface setup */
3784void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 3785{
46900298 3786 struct ieee80211_if_managed *ifmgd;
988c0f72 3787
46900298 3788 ifmgd = &sdata->u.mgd;
b291ba11 3789 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 3790 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 3791 INIT_WORK(&ifmgd->beacon_connection_loss_work,
3792 ieee80211_beacon_connection_loss_work);
882a7c69
JB		 3793 INIT_WORK(&ifmgd->csa_connection_drop_work,
3794 ieee80211_csa_connection_drop_work);
687da132 3795 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
81dd2b88
AN		 3796 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
3797 ieee80211_tdls_peer_del_work);
46900298 3798 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 3799 (unsigned long) sdata);
b291ba11
JB		 3800 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
3801 (unsigned long) sdata);
3802 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
3803 (unsigned long) sdata);
46900298 3804 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 3805 (unsigned long) sdata);
9c6bd790 3806
ab1faead 3807 ifmgd->flags = 0;
1478acb3 3808 ifmgd->powersave = sdata->wdev.ps;
219c3867
AB		 3809 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
3810 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
67baf663 3811 ifmgd->p2p_noa_index = -1;
bbbdff9e 3812
0d8614b4 3813 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
0f78231b
JB		 3814 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
3815 else
3816 ifmgd->req_smps = IEEE80211_SMPS_OFF;
f0706e82
JB		 3817}
3818
77fdaa12
JB		 3819/* scan finished notification */
3820void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 3821{
31ee67a1 3822 struct ieee80211_sub_if_data *sdata;
60f8b39c 3823
77fdaa12
JB		 3824 /* Restart STA timers */
3825 rcu_read_lock();
370bd005
BG		 3826 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3827 if (ieee80211_sdata_running(sdata))
3828 ieee80211_restart_sta_timer(sdata);
3829 }
77fdaa12
JB		 3830 rcu_read_unlock();
3831}
60f8b39c 3832
77fdaa12
JB		 3833int ieee80211_max_network_latency(struct notifier_block *nb,
3834 unsigned long data, void *dummy)
3835{
3836 s32 latency_usec = (s32) data;
3837 struct ieee80211_local *local =
3838 container_of(nb, struct ieee80211_local,
3839 network_latency_notifier);
1fa6f4af 3840
77fdaa12
JB		 3841 mutex_lock(&local->iflist_mtx);
3842 ieee80211_recalc_ps(local, latency_usec);
3843 mutex_unlock(&local->iflist_mtx);
dfe67012 3844
8bd811aa 3845 return NOTIFY_OK;
9c6bd790
JB		 3846}
3847
f2d9d270
JB		 3848static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
3849 struct cfg80211_bss *cbss)
3850{
3851 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3852 const u8 *ht_cap_ie, *vht_cap_ie;
3853 const struct ieee80211_ht_cap *ht_cap;
3854 const struct ieee80211_vht_cap *vht_cap;
3855 u8 chains = 1;
3856
3857 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
3858 return chains;
3859
9caf0364 3860 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
f2d9d270
JB		 3861 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
3862 ht_cap = (void *)(ht_cap_ie + 2);
3863 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
3864 /*
3865 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
3866 * "Tx Unequal Modulation Supported" fields.
3867 */
3868 }
3869
3870 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
3871 return chains;
3872
9caf0364 3873 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
f2d9d270
JB		 3874 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
3875 u8 nss;
3876 u16 tx_mcs_map;
3877
3878 vht_cap = (void *)(vht_cap_ie + 2);
3879 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
3880 for (nss = 8; nss > 0; nss--) {
3881 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
3882 IEEE80211_VHT_MCS_NOT_SUPPORTED)
3883 break;
3884 }
3885 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
3886 chains = max(chains, nss);
3887 }
3888
3889 return chains;
3890}
3891
b17166a7
JB		 3892static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
3893 struct cfg80211_bss *cbss)
a1cf775d
JB		 3894{
3895 struct ieee80211_local *local = sdata->local;
3896 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
53b954ee 3897 const struct ieee80211_ht_cap *ht_cap = NULL;
24398e39 3898 const struct ieee80211_ht_operation *ht_oper = NULL;
f2d9d270 3899 const struct ieee80211_vht_operation *vht_oper = NULL;
24398e39 3900 struct ieee80211_supported_band *sband;
4bf88530 3901 struct cfg80211_chan_def chandef;
f2d9d270 3902 int ret;
a1cf775d 3903
24398e39
JB		 3904 sband = local->hw.wiphy->bands[cbss->channel->band];
3905
f2d9d270
JB		 3906 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
3907 IEEE80211_STA_DISABLE_80P80MHZ |
3908 IEEE80211_STA_DISABLE_160MHZ);
3909
9caf0364
JB		 3910 rcu_read_lock();
3911
f2d9d270
JB		 3912 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3913 sband->ht_cap.ht_supported) {
53b954ee 3914 const u8 *ht_oper_ie, *ht_cap_ie;
24398e39 3915
9caf0364 3916 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
24398e39
JB		 3917 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3918 ht_oper = (void *)(ht_oper_ie + 2);
08e6effa 3919
53b954ee
EP		 3920 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
3921 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
3922 ht_cap = (void *)(ht_cap_ie + 2);
3923
3924 if (!ht_cap) {
08e6effa
JB		 3925 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3926 ht_oper = NULL;
3927 }
24398e39
JB		 3928 }
3929
f2d9d270
JB		 3930 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3931 sband->vht_cap.vht_supported) {
08e6effa 3932 const u8 *vht_oper_ie, *vht_cap;
f2d9d270 3933
9caf0364
JB		 3934 vht_oper_ie = ieee80211_bss_get_ie(cbss,
3935 WLAN_EID_VHT_OPERATION);
f2d9d270
JB		 3936 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
3937 vht_oper = (void *)(vht_oper_ie + 2);
3938 if (vht_oper && !ht_oper) {
3939 vht_oper = NULL;
bdcbd8e0 3940 sdata_info(sdata,
f2d9d270 3941 "AP advertised VHT without HT, disabling both\n");
cb145022
JB		 3942 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3943 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
24398e39 3944 }
08e6effa
JB		 3945
3946 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
3947 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
3948 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3949 vht_oper = NULL;
3950 }
24398e39
JB		 3951 }
3952
f2d9d270
JB		 3953 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
3954 cbss->channel,
53b954ee 3955 ht_cap, ht_oper, vht_oper,
5cdaed1e 3956 &chandef, false);
04ecd257 3957
f2d9d270
JB		 3958 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
3959 local->rx_chains);
24398e39 3960
9caf0364
JB		 3961 rcu_read_unlock();
3962
04ecd257
JB		 3963 /* will change later if needed */
3964 sdata->smps_mode = IEEE80211_SMPS_OFF;
3965
34a3740d 3966 mutex_lock(&local->mtx);
f2d9d270
JB		 3967 /*
3968 * If this fails (possibly due to channel context sharing
3969 * on incompatible channels, e.g. 80+80 and 160 sharing the
3970 * same control channel) try to use a smaller bandwidth.
3971 */
3972 ret = ieee80211_vif_use_channel(sdata, &chandef,
3973 IEEE80211_CHANCTX_SHARED);
0418a445
SW		 3974
3975 /* don't downgrade for 5 and 10 MHz channels, though. */
3976 if (chandef.width == NL80211_CHAN_WIDTH_5 ||
3977 chandef.width == NL80211_CHAN_WIDTH_10)
34a3740d 3978 goto out;
0418a445 3979
d601cd8d 3980 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
e6b7cde4 3981 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
d601cd8d
JB		 3982 ret = ieee80211_vif_use_channel(sdata, &chandef,
3983 IEEE80211_CHANCTX_SHARED);
3984 }
34a3740d
JB		 3985 out:
3986 mutex_unlock(&local->mtx);
f2d9d270 3987 return ret;
b17166a7
JB		 3988}
3989
3990static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
3991 struct cfg80211_bss *cbss, bool assoc)
3992{
3993 struct ieee80211_local *local = sdata->local;
3994 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3995 struct ieee80211_bss *bss = (void *)cbss->priv;
3996 struct sta_info *new_sta = NULL;
3997 bool have_sta = false;
3998 int err;
3999
4000 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
4001 return -EINVAL;
4002
4003 if (assoc) {
4004 rcu_read_lock();
4005 have_sta = sta_info_get(sdata, cbss->bssid);
4006 rcu_read_unlock();
4007 }
4008
4009 if (!have_sta) {
4010 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4011 if (!new_sta)
4012 return -ENOMEM;
4013 }
13e0c8e3 4014 if (new_sta) {
5d6a1b06
JB		 4015 u32 rates = 0, basic_rates = 0;
4016 bool have_higher_than_11mbit;
4017 int min_rate = INT_MAX, min_rate_index = -1;
2103dec1 4018 struct ieee80211_chanctx_conf *chanctx_conf;
b17166a7 4019 struct ieee80211_supported_band *sband;
8cef2c9d 4020 const struct cfg80211_bss_ies *ies;
2103dec1
SW		 4021 int shift;
4022 u32 rate_flags;
b17166a7
JB		 4023
4024 sband = local->hw.wiphy->bands[cbss->channel->band];
4025
4026 err = ieee80211_prep_channel(sdata, cbss);
4027 if (err) {
4028 sta_info_free(local, new_sta);
2103dec1 4029 return -EINVAL;
b17166a7 4030 }
2103dec1
SW		 4031 shift = ieee80211_vif_get_shift(&sdata->vif);
4032
4033 rcu_read_lock();
4034 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4035 if (WARN_ON(!chanctx_conf)) {
4036 rcu_read_unlock();
c368ddaa 4037 sta_info_free(local, new_sta);
2103dec1
SW		 4038 return -EINVAL;
4039 }
4040 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
4041 rcu_read_unlock();
5d6a1b06 4042
5d6a1b06
JB		 4043 ieee80211_get_rates(sband, bss->supp_rates,
4044 bss->supp_rates_len,
4045 &rates, &basic_rates,
4046 &have_higher_than_11mbit,
2103dec1
SW		 4047 &min_rate, &min_rate_index,
4048 shift, rate_flags);
5d6a1b06
JB		 4049
4050 /*
4051 * This used to be a workaround for basic rates missing
4052 * in the association response frame. Now that we no
4053 * longer use the basic rates from there, it probably
4054 * doesn't happen any more, but keep the workaround so
4055 * in case some *other* APs are buggy in different ways
4056 * we can connect -- with a warning.
4057 */
4058 if (!basic_rates && min_rate_index >= 0) {
bdcbd8e0
JB		 4059 sdata_info(sdata,
4060 "No basic rates, using min rate instead\n");
5d6a1b06
JB		 4061 basic_rates = BIT(min_rate_index);
4062 }
4063
13e0c8e3 4064 new_sta->sta.supp_rates[cbss->channel->band] = rates;
5d6a1b06
JB		 4065 sdata->vif.bss_conf.basic_rates = basic_rates;
4066
4067 /* cf. IEEE 802.11 9.2.12 */
55de908a 4068 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
5d6a1b06
JB		 4069 have_higher_than_11mbit)
4070 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
4071 else
4072 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
4073
4074 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
4075
8c358bcd
JB		 4076 /* set timing information */
4077 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
8cef2c9d 4078 rcu_read_lock();
ef429dad
JB		 4079 ies = rcu_dereference(cbss->beacon_ies);
4080 if (ies) {
4081 const u8 *tim_ie;
4082
4083 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4084 sdata->vif.bss_conf.sync_device_ts =
4085 bss->device_ts_beacon;
4086 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4087 ies->data, ies->len);
4088 if (tim_ie && tim_ie[1] >= 2)
4089 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
4090 else
4091 sdata->vif.bss_conf.sync_dtim_count = 0;
4092 } else if (!(local->hw.flags &
4093 IEEE80211_HW_TIMING_BEACON_ONLY)) {
4094 ies = rcu_dereference(cbss->proberesp_ies);
4095 /* must be non-NULL since beacon IEs were NULL */
4096 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4097 sdata->vif.bss_conf.sync_device_ts =
4098 bss->device_ts_presp;
4099 sdata->vif.bss_conf.sync_dtim_count = 0;
4100 } else {
4101 sdata->vif.bss_conf.sync_tsf = 0;
4102 sdata->vif.bss_conf.sync_device_ts = 0;
4103 sdata->vif.bss_conf.sync_dtim_count = 0;
4104 }
8cef2c9d 4105 rcu_read_unlock();
8c358bcd
JB		 4106
4107 /* tell driver about BSSID, basic rates and timing */
5d6a1b06 4108 ieee80211_bss_info_change_notify(sdata,
8c358bcd
JB		 4109 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4110 BSS_CHANGED_BEACON_INT);
a1cf775d
JB		 4111
4112 if (assoc)
13e0c8e3 4113 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
a1cf775d 4114
13e0c8e3
JB		 4115 err = sta_info_insert(new_sta);
4116 new_sta = NULL;
a1cf775d 4117 if (err) {
bdcbd8e0
JB		 4118 sdata_info(sdata,
4119 "failed to insert STA entry for the AP (error %d)\n",
4120 err);
a1cf775d
JB		 4121 return err;
4122 }
4123 } else
b203ca39 4124 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
a1cf775d
JB		 4125
4126 return 0;
4127}
4128
77fdaa12
JB		 4129/* config hooks */
4130int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4131 struct cfg80211_auth_request *req)
9c6bd790 4132{
66e67e41
JB		 4133 struct ieee80211_local *local = sdata->local;
4134 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4135 struct ieee80211_mgd_auth_data *auth_data;
77fdaa12 4136 u16 auth_alg;
66e67e41
JB		 4137 int err;
4138
4139 /* prepare auth data structure */
9c6bd790 4140
77fdaa12
JB		 4141 switch (req->auth_type) {
4142 case NL80211_AUTHTYPE_OPEN_SYSTEM:
4143 auth_alg = WLAN_AUTH_OPEN;
4144 break;
4145 case NL80211_AUTHTYPE_SHARED_KEY:
66e67e41 4146 if (IS_ERR(local->wep_tx_tfm))
9dca9c49 4147 return -EOPNOTSUPP;
77fdaa12
JB		 4148 auth_alg = WLAN_AUTH_SHARED_KEY;
4149 break;
4150 case NL80211_AUTHTYPE_FT:
4151 auth_alg = WLAN_AUTH_FT;
4152 break;
4153 case NL80211_AUTHTYPE_NETWORK_EAP:
4154 auth_alg = WLAN_AUTH_LEAP;
4155 break;
6b8ece3a
JM		 4156 case NL80211_AUTHTYPE_SAE:
4157 auth_alg = WLAN_AUTH_SAE;
4158 break;
77fdaa12
JB		 4159 default:
4160 return -EOPNOTSUPP;
60f8b39c 4161 }
77fdaa12 4162
6b8ece3a
JM		 4163 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
4164 req->ie_len, GFP_KERNEL);
66e67e41 4165 if (!auth_data)
9c6bd790 4166 return -ENOMEM;
77fdaa12 4167
66e67e41 4168 auth_data->bss = req->bss;
77fdaa12 4169
6b8ece3a
JM		 4170 if (req->sae_data_len >= 4) {
4171 __le16 *pos = (__le16 *) req->sae_data;
4172 auth_data->sae_trans = le16_to_cpu(pos[0]);
4173 auth_data->sae_status = le16_to_cpu(pos[1]);
4174 memcpy(auth_data->data, req->sae_data + 4,
4175 req->sae_data_len - 4);
4176 auth_data->data_len += req->sae_data_len - 4;
4177 }
4178
77fdaa12 4179 if (req->ie && req->ie_len) {
6b8ece3a
JM		 4180 memcpy(&auth_data->data[auth_data->data_len],
4181 req->ie, req->ie_len);
4182 auth_data->data_len += req->ie_len;
9c6bd790 4183 }
77fdaa12 4184
fffd0934 4185 if (req->key && req->key_len) {
66e67e41
JB		 4186 auth_data->key_len = req->key_len;
4187 auth_data->key_idx = req->key_idx;
4188 memcpy(auth_data->key, req->key, req->key_len);
fffd0934
JB		 4189 }
4190
66e67e41 4191 auth_data->algorithm = auth_alg;
60f8b39c 4192
66e67e41 4193 /* try to authenticate/probe */
2a33bee2 4194
66e67e41
JB		 4195 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4196 ifmgd->assoc_data) {
4197 err = -EBUSY;
4198 goto err_free;
2a33bee2
GE		 4199 }
4200
66e67e41
JB		 4201 if (ifmgd->auth_data)
4202 ieee80211_destroy_auth_data(sdata, false);
2a33bee2 4203
66e67e41
JB		 4204 /* prep auth_data so we don't go into idle on disassoc */
4205 ifmgd->auth_data = auth_data;
af6b6374 4206
7b119dc0
JB		 4207 if (ifmgd->associated) {
4208 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4209
4210 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4211 WLAN_REASON_UNSPECIFIED,
4212 false, frame_buf);
4213
6ff57cf8
JB		 4214 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4215 sizeof(frame_buf));
7b119dc0 4216 }
af6b6374 4217
bdcbd8e0 4218 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
e5b900d2 4219
a1cf775d
JB		 4220 err = ieee80211_prep_connection(sdata, req->bss, false);
4221 if (err)
66e67e41 4222 goto err_clear;
af6b6374 4223
66e67e41
JB		 4224 err = ieee80211_probe_auth(sdata);
4225 if (err) {
66e67e41
JB		 4226 sta_info_destroy_addr(sdata, req->bss->bssid);
4227 goto err_clear;
4228 }
4229
4230 /* hold our own reference */
5b112d3d 4231 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
8d61ffa5 4232 return 0;
66e67e41
JB		 4233
4234 err_clear:
3d2abdfd
EP		 4235 memset(ifmgd->bssid, 0, ETH_ALEN);
4236 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 4237 ifmgd->auth_data = NULL;
4238 err_free:
4239 kfree(auth_data);
66e67e41 4240 return err;
af6b6374
JB		 4241}
4242
095d81ce
JB		 4243static bool ieee80211_usable_wmm_params(struct ieee80211_sub_if_data *sdata,
4244 const u8 *wmm_param, int len)
4245{
4246 const u8 *pos;
4247 size_t left;
4248
4249 if (len < 8)
4250 return false;
4251
4252 if (wmm_param[5] != 1 /* version */)
4253 return false;
4254
4255 pos = wmm_param + 8;
4256 left = len - 8;
4257
4258 for (; left >= 4; left -= 4, pos += 4) {
4259 u8 aifsn = pos[0] & 0x0f;
4260 u8 ecwmin = pos[1] & 0x0f;
4261 u8 ecwmax = (pos[1] & 0xf0) >> 4;
4262 int aci = (pos[0] >> 5) & 0x03;
4263
4264 if (aifsn < 2) {
4265 sdata_info(sdata,
4266 "AP has invalid WMM params (AIFSN=%d for ACI %d), disabling WMM\n",
4267 aifsn, aci);
4268 return false;
4269 }
4270 if (ecwmin > ecwmax) {
4271 sdata_info(sdata,
4272 "AP has invalid WMM params (ECWmin/max=%d/%d for ACI %d), disabling WMM\n",
4273 ecwmin, ecwmax, aci);
4274 return false;
4275 }
4276 }
4277
4278 return true;
4279}
4280
77fdaa12
JB		 4281int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4282 struct cfg80211_assoc_request *req)
f0706e82 4283{
66e67e41 4284 struct ieee80211_local *local = sdata->local;
77fdaa12 4285 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 4286 struct ieee80211_bss *bss = (void *)req->bss->priv;
66e67e41 4287 struct ieee80211_mgd_assoc_data *assoc_data;
c65dd147 4288 const struct cfg80211_bss_ies *beacon_ies;
4e74bfdb 4289 struct ieee80211_supported_band *sband;
b08fbbd8 4290 const u8 *ssidie, *ht_ie, *vht_ie;
2a33bee2 4291 int i, err;
f0706e82 4292
66e67e41
JB		 4293 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4294 if (!assoc_data)
4295 return -ENOMEM;
4296
9caf0364
JB		 4297 rcu_read_lock();
4298 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4299 if (!ssidie) {
4300 rcu_read_unlock();
4301 kfree(assoc_data);
4302 return -EINVAL;
4303 }
4304 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4305 assoc_data->ssid_len = ssidie[1];
4306 rcu_read_unlock();
4307
7b119dc0
JB		 4308 if (ifmgd->associated) {
4309 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4310
4311 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4312 WLAN_REASON_UNSPECIFIED,
4313 false, frame_buf);
4314
6ff57cf8
JB		 4315 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4316 sizeof(frame_buf));
7b119dc0 4317 }
66e67e41
JB		 4318
4319 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4320 err = -EBUSY;
4321 goto err_free;
af6b6374 4322 }
77fdaa12 4323
66e67e41
JB		 4324 if (ifmgd->assoc_data) {
4325 err = -EBUSY;
4326 goto err_free;
4327 }
77fdaa12 4328
66e67e41
JB		 4329 if (ifmgd->auth_data) {
4330 bool match;
4331
4332 /* keep sta info, bssid if matching */
b203ca39 4333 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
66e67e41 4334 ieee80211_destroy_auth_data(sdata, match);
2a33bee2
GE		 4335 }
4336
66e67e41 4337 /* prepare assoc data */
095d81ce 4338
d8ec4433
JO		 4339 ifmgd->beacon_crc_valid = false;
4340
095d81ce
JB		 4341 assoc_data->wmm = bss->wmm_used &&
4342 (local->hw.queues >= IEEE80211_NUM_ACS);
4343 if (assoc_data->wmm) {
4344 /* try to check validity of WMM params IE */
4345 const struct cfg80211_bss_ies *ies;
4346 const u8 *wp, *start, *end;
4347
4348 rcu_read_lock();
4349 ies = rcu_dereference(req->bss->ies);
4350 start = ies->data;
4351 end = start + ies->len;
4352
4353 while (true) {
4354 wp = cfg80211_find_vendor_ie(
4355 WLAN_OUI_MICROSOFT,
4356 WLAN_OUI_TYPE_MICROSOFT_WMM,
4357 start, end - start);
4358 if (!wp)
4359 break;
4360 start = wp + wp[1] + 2;
4361 /* if this IE is too short, try the next */
4362 if (wp[1] <= 4)
4363 continue;
4364 /* if this IE is WMM params, we found what we wanted */
4365 if (wp[6] == 1)
4366 break;
4367 }
4368
4369 if (!wp || !ieee80211_usable_wmm_params(sdata, wp + 2,
4370 wp[1] - 2)) {
4371 assoc_data->wmm = false;
4372 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
4373 }
4374 rcu_read_unlock();
4375 }
4376
de5036aa
JB		 4377 /*
4378 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4379 * We still associate in non-HT mode (11a/b/g) if any one of these
4380 * ciphers is configured as pairwise.
4381 * We can set this to true for non-11n hardware, that'll be checked
4382 * separately along with the peer capabilities.
4383 */
1c4cb928 4384 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
77fdaa12
JB		 4385 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4386 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
1c4cb928 4387 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
a8243b72 4388 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
d545daba 4389 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
1c4cb928 4390 netdev_info(sdata->dev,
d545daba 4391 "disabling HT/VHT due to WEP/TKIP use\n");
1c4cb928
JB		 4392 }
4393 }
77fdaa12 4394
d545daba 4395 if (req->flags & ASSOC_REQ_DISABLE_HT) {
a8243b72 4396 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
d545daba
MP		 4397 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4398 }
ef96a842 4399
dd5ecfea
JB		 4400 if (req->flags & ASSOC_REQ_DISABLE_VHT)
4401 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4402
4e74bfdb
JB		 4403 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4404 sband = local->hw.wiphy->bands[req->bss->channel->band];
4405 if (!sband->ht_cap.ht_supported ||
095d81ce
JB		 4406 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4407 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
a8243b72 4408 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
095d81ce
JB		 4409 if (!bss->wmm_used &&
4410 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
1b49de26
JB		 4411 netdev_info(sdata->dev,
4412 "disabling HT as WMM/QoS is not supported by the AP\n");
1c4cb928 4413 }
4e74bfdb 4414
d545daba
MP		 4415 /* disable VHT if we don't support it or the AP doesn't use WMM */
4416 if (!sband->vht_cap.vht_supported ||
095d81ce
JB		 4417 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4418 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
d545daba 4419 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
095d81ce
JB		 4420 if (!bss->wmm_used &&
4421 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
1b49de26
JB		 4422 netdev_info(sdata->dev,
4423 "disabling VHT as WMM/QoS is not supported by the AP\n");
d545daba
MP		 4424 }
4425
ef96a842
BG		 4426 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4427 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4428 sizeof(ifmgd->ht_capa_mask));
4429
dd5ecfea
JB		 4430 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4431 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4432 sizeof(ifmgd->vht_capa_mask));
4433
77fdaa12 4434 if (req->ie && req->ie_len) {
66e67e41
JB		 4435 memcpy(assoc_data->ie, req->ie, req->ie_len);
4436 assoc_data->ie_len = req->ie_len;
4437 }
f679f65d 4438
66e67e41 4439 assoc_data->bss = req->bss;
f679f65d 4440
af6b6374
JB		 4441 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4442 if (ifmgd->powersave)
04ecd257 4443 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
af6b6374 4444 else
04ecd257 4445 sdata->smps_mode = IEEE80211_SMPS_OFF;
af6b6374 4446 } else
04ecd257 4447 sdata->smps_mode = ifmgd->req_smps;
af6b6374 4448
66e67e41 4449 assoc_data->capability = req->bss->capability;
66e67e41
JB		 4450 assoc_data->supp_rates = bss->supp_rates;
4451 assoc_data->supp_rates_len = bss->supp_rates_len;
9dde6423 4452
9caf0364 4453 rcu_read_lock();
9dde6423
JB		 4454 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4455 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4456 assoc_data->ap_ht_param =
4457 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4458 else
a8243b72 4459 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
b08fbbd8
JB		 4460 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4461 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4462 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4463 sizeof(struct ieee80211_vht_cap));
4464 else
4465 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
9caf0364 4466 rcu_read_unlock();
63f170e0 4467
ab13315a 4468 if (bss->wmm_used && bss->uapsd_supported &&
bb512ad0 4469 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
76f0303d 4470 assoc_data->uapsd = true;
ab13315a
KV		 4471 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4472 } else {
76f0303d 4473 assoc_data->uapsd = false;
ab13315a
KV		 4474 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4475 }
4476
77fdaa12 4477 if (req->prev_bssid)
66e67e41 4478 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12
JB		 4479
4480 if (req->use_mfp) {
4481 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4482 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4483 } else {
4484 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4485 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4486 }
4487
cd2f5dd7
AK		 4488 if (req->flags & ASSOC_REQ_USE_RRM)
4489 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
4490 else
4491 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
4492
77fdaa12
JB		 4493 if (req->crypto.control_port)
4494 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4495 else
4496 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4497
a621fa4d
JB		 4498 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4499 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
2475b1cc
MS		 4500 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
4501 sdata->vif.type);
a621fa4d 4502
66e67e41
JB		 4503 /* kick off associate process */
4504
4505 ifmgd->assoc_data = assoc_data;
826262c3 4506 ifmgd->dtim_period = 0;
989c6505 4507 ifmgd->have_beacon = false;
66e67e41 4508
a1cf775d
JB		 4509 err = ieee80211_prep_connection(sdata, req->bss, true);
4510 if (err)
4511 goto err_clear;
66e67e41 4512
c65dd147
EG		 4513 rcu_read_lock();
4514 beacon_ies = rcu_dereference(req->bss->beacon_ies);
826262c3 4515
c65dd147
EG		 4516 if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC &&
4517 !beacon_ies) {
4518 /*
4519 * Wait up to one beacon interval ...
4520 * should this be more if we miss one?
4521 */
4522 sdata_info(sdata, "waiting for beacon from %pM\n",
4523 ifmgd->bssid);
4524 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
89afe614 4525 assoc_data->timeout_started = true;
c65dd147
EG		 4526 assoc_data->need_beacon = true;
4527 } else if (beacon_ies) {
4528 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4529 beacon_ies->data,
4530 beacon_ies->len);
ef429dad
JB		 4531 u8 dtim_count = 0;
4532
c65dd147
EG		 4533 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4534 const struct ieee80211_tim_ie *tim;
4535 tim = (void *)(tim_ie + 2);
4536 ifmgd->dtim_period = tim->dtim_period;
ef429dad 4537 dtim_count = tim->dtim_count;
826262c3 4538 }
989c6505 4539 ifmgd->have_beacon = true;
66e67e41 4540 assoc_data->timeout = jiffies;
89afe614 4541 assoc_data->timeout_started = true;
ef429dad
JB		 4542
4543 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
4544 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4545 sdata->vif.bss_conf.sync_device_ts =
4546 bss->device_ts_beacon;
4547 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4548 }
c65dd147
EG		 4549 } else {
4550 assoc_data->timeout = jiffies;
89afe614 4551 assoc_data->timeout_started = true;
66e67e41 4552 }
c65dd147
EG		 4553 rcu_read_unlock();
4554
8d61ffa5 4555 run_again(sdata, assoc_data->timeout);
66e67e41 4556
fcff4f10
PS		 4557 if (bss->corrupt_data) {
4558 char *corrupt_type = "data";
4559 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4560 if (bss->corrupt_data &
4561 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4562 corrupt_type = "beacon and probe response";
4563 else
4564 corrupt_type = "beacon";
4565 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4566 corrupt_type = "probe response";
bdcbd8e0
JB		 4567 sdata_info(sdata, "associating with AP with corrupt %s\n",
4568 corrupt_type);
fcff4f10
PS		 4569 }
4570
8d61ffa5 4571 return 0;
66e67e41 4572 err_clear:
3d2abdfd
EP		 4573 memset(ifmgd->bssid, 0, ETH_ALEN);
4574 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 4575 ifmgd->assoc_data = NULL;
4576 err_free:
4577 kfree(assoc_data);
66e67e41 4578 return err;
f0706e82
JB		 4579}
4580
77fdaa12 4581int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
63c9c5e7 4582 struct cfg80211_deauth_request *req)
f0706e82 4583{
46900298 4584 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 4585 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
6863255b 4586 bool tx = !req->local_state_change;
f0706e82 4587
c9c3a060
JB		 4588 if (ifmgd->auth_data &&
4589 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
4590 sdata_info(sdata,
4591 "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
4592 req->bssid, req->reason_code,
4593 ieee80211_get_reason_code_string(req->reason_code));
0ff71613 4594
8c7d857c 4595 drv_mgd_prepare_tx(sdata->local, sdata);
37ad3888
JB		 4596 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4597 IEEE80211_STYPE_DEAUTH,
6863255b 4598 req->reason_code, tx,
37ad3888 4599 frame_buf);
86552017 4600 ieee80211_destroy_auth_data(sdata, false);
c9c3a060
JB		 4601 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4602 IEEE80211_DEAUTH_FRAME_LEN);
86552017 4603
c9c3a060 4604 return 0;
8c7d857c
EG		 4605 }
4606
86552017
JB		 4607 if (ifmgd->associated &&
4608 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
c9c3a060
JB		 4609 sdata_info(sdata,
4610 "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
4611 req->bssid, req->reason_code,
4612 ieee80211_get_reason_code_string(req->reason_code));
4613
86552017
JB		 4614 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4615 req->reason_code, tx, frame_buf);
6ff57cf8
JB		 4616 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4617 IEEE80211_DEAUTH_FRAME_LEN);
c9c3a060
JB		 4618 return 0;
4619 }
86552017 4620
c9c3a060 4621 return -ENOTCONN;
f0706e82 4622}
84363e6e 4623
77fdaa12 4624int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 4625 struct cfg80211_disassoc_request *req)
9c6bd790 4626{
77fdaa12 4627 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 4628 u8 bssid[ETH_ALEN];
6ae16775 4629 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
9c6bd790 4630
8d8b261a
JB		 4631 /*
4632 * cfg80211 should catch this ... but it's racy since
4633 * we can receive a disassoc frame, process it, hand it
4634 * to cfg80211 while that's in a locked section already
4635 * trying to tell us that the user wants to disconnect.
4636 */
8d61ffa5 4637 if (ifmgd->associated != req->bss)
77fdaa12 4638 return -ENOLINK;
77fdaa12 4639
bdcbd8e0 4640 sdata_info(sdata,
dfa1ad29
CO		 4641 "disassociating from %pM by local choice (Reason: %u=%s)\n",
4642 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
0ff71613 4643
e69e95db 4644 memcpy(bssid, req->bss->bssid, ETH_ALEN);
37ad3888
JB		 4645 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4646 req->reason_code, !req->local_state_change,
4647 frame_buf);
10f644a4 4648
6ff57cf8
JB		 4649 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4650 IEEE80211_DEAUTH_FRAME_LEN);
bc83b681 4651
10f644a4
JB		 4652 return 0;
4653}
026331c4 4654
afa762f6 4655void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
54e4ffb2
JB		 4656{
4657 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4658
49921859
BG		 4659 /*
4660 * Make sure some work items will not run after this,
4661 * they will not do anything but might not have been
4662 * cancelled when disconnecting.
4663 */
4664 cancel_work_sync(&ifmgd->monitor_work);
4665 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
4666 cancel_work_sync(&ifmgd->request_smps_work);
4667 cancel_work_sync(&ifmgd->csa_connection_drop_work);
4668 cancel_work_sync(&ifmgd->chswitch_work);
81dd2b88 4669 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
49921859 4670
8d61ffa5 4671 sdata_lock(sdata);
959867fa
JB		 4672 if (ifmgd->assoc_data) {
4673 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
54e4ffb2 4674 ieee80211_destroy_assoc_data(sdata, false);
959867fa
JB		 4675 cfg80211_assoc_timeout(sdata->dev, bss);
4676 }
54e4ffb2
JB		 4677 if (ifmgd->auth_data)
4678 ieee80211_destroy_auth_data(sdata, false);
4679 del_timer_sync(&ifmgd->timer);
8d61ffa5 4680 sdata_unlock(sdata);
54e4ffb2
JB		 4681}
4682
a97c13c3
JO		 4683void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
4684 enum nl80211_cqm_rssi_threshold_event rssi_event,
4685 gfp_t gfp)
4686{
4687 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4688
b5878a2d
JB		 4689 trace_api_cqm_rssi_notify(sdata, rssi_event);
4690
a97c13c3
JO		 4691 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
4692}
4693EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
ubuntu-bionic-kernel mirror