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fat: fix oops on corrupted vfat fs
[deliverable/linux.git] / net / mac80211 / mlme.c
CommitLineData
f0706e82
JB		 1/*
2 * BSS client mode implementation
5394af4d 3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
f0706e82
JB		 4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
d98ad83e 8 * Copyright 2013-2014 Intel Mobile Communications GmbH
f0706e82
JB		 9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
13 */
14
5b323edb 15#include <linux/delay.h>
f0706e82
JB		 16#include <linux/if_ether.h>
17#include <linux/skbuff.h>
f0706e82 18#include <linux/if_arp.h>
f0706e82 19#include <linux/etherdevice.h>
d9b93842 20#include <linux/moduleparam.h>
d0709a65 21#include <linux/rtnetlink.h>
e8db0be1 22#include <linux/pm_qos.h>
d91f36db 23#include <linux/crc32.h>
5a0e3ad6 24#include <linux/slab.h>
bc3b2d7f 25#include <linux/export.h>
f0706e82 26#include <net/mac80211.h>
472dbc45 27#include <asm/unaligned.h>
60f8b39c 28
f0706e82 29#include "ieee80211_i.h"
24487981 30#include "driver-ops.h"
2c8dccc7
JB		 31#include "rate.h"
32#include "led.h"
f0706e82 33
1672c0e3 34#define IEEE80211_AUTH_TIMEOUT (HZ / 5)
cb236d2d 35#define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2)
1672c0e3
JB		 36#define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10)
37#define IEEE80211_AUTH_MAX_TRIES 3
38#define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
39#define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
cb236d2d 40#define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2)
1672c0e3
JB		 41#define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10)
42#define IEEE80211_ASSOC_MAX_TRIES 3
66e67e41 43
180205bd
BG		 44static int max_nullfunc_tries = 2;
45module_param(max_nullfunc_tries, int, 0644);
46MODULE_PARM_DESC(max_nullfunc_tries,
47 "Maximum nullfunc tx tries before disconnecting (reason 4).");
48
49static int max_probe_tries = 5;
50module_param(max_probe_tries, int, 0644);
51MODULE_PARM_DESC(max_probe_tries,
52 "Maximum probe tries before disconnecting (reason 4).");
b291ba11
JB		 53
54/*
7ccc8bd7
FF		 55 * Beacon loss timeout is calculated as N frames times the
56 * advertised beacon interval. This may need to be somewhat
57 * higher than what hardware might detect to account for
58 * delays in the host processing frames. But since we also
59 * probe on beacon miss before declaring the connection lost
60 * default to what we want.
b291ba11 61 */
59c1ec2b
BG		 62static int beacon_loss_count = 7;
63module_param(beacon_loss_count, int, 0644);
64MODULE_PARM_DESC(beacon_loss_count,
65 "Number of beacon intervals before we decide beacon was lost.");
7ccc8bd7 66
b291ba11
JB		 67/*
68 * Time the connection can be idle before we probe
69 * it to see if we can still talk to the AP.
70 */
d1c5091f 71#define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
b291ba11
JB		 72/*
73 * Time we wait for a probe response after sending
74 * a probe request because of beacon loss or for
75 * checking the connection still works.
76 */
180205bd
BG		 77static int probe_wait_ms = 500;
78module_param(probe_wait_ms, int, 0644);
79MODULE_PARM_DESC(probe_wait_ms,
80 "Maximum time(ms) to wait for probe response"
81 " before disconnecting (reason 4).");
f0706e82 82
17e4ec14
JM		 83/*
84 * Weight given to the latest Beacon frame when calculating average signal
85 * strength for Beacon frames received in the current BSS. This must be
86 * between 1 and 15.
87 */
88#define IEEE80211_SIGNAL_AVE_WEIGHT 3
89
391a200a
JM		 90/*
91 * How many Beacon frames need to have been used in average signal strength
92 * before starting to indicate signal change events.
93 */
94#define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
95
ca386f31
JB		 96/*
97 * We can have multiple work items (and connection probing)
98 * scheduling this timer, but we need to take care to only
99 * reschedule it when it should fire _earlier_ than it was
100 * asked for before, or if it's not pending right now. This
101 * function ensures that. Note that it then is required to
102 * run this function for all timeouts after the first one
103 * has happened -- the work that runs from this timer will
104 * do that.
105 */
8d61ffa5
JB		 106static void run_again(struct ieee80211_sub_if_data *sdata,
107 unsigned long timeout)
ca386f31 108{
8d61ffa5 109 sdata_assert_lock(sdata);
ca386f31 110
8d61ffa5
JB		 111 if (!timer_pending(&sdata->u.mgd.timer) ||
112 time_before(timeout, sdata->u.mgd.timer.expires))
113 mod_timer(&sdata->u.mgd.timer, timeout);
ca386f31
JB		 114}
115
d3a910a8 116void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
b291ba11 117{
c1288b12 118 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
b291ba11
JB		 119 return;
120
7eeff74c
JB		 121 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
122 return;
123
b291ba11 124 mod_timer(&sdata->u.mgd.bcn_mon_timer,
7ccc8bd7 125 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
b291ba11
JB		 126}
127
be099e82
LR		 128void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
129{
0c699c3a
LR		 130 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
131
8628172f
SG		 132 if (unlikely(!sdata->u.mgd.associated))
133 return;
134
448cd2e2
EP		 135 ifmgd->probe_send_count = 0;
136
be099e82
LR		 137 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
138 return;
139
140 mod_timer(&sdata->u.mgd.conn_mon_timer,
141 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
142}
143
5484e237 144static int ecw2cw(int ecw)
60f8b39c 145{
5484e237 146 return (1 << ecw) - 1;
60f8b39c
JB		 147}
148
6565ec9b
JB		 149static u32
150ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
151 struct ieee80211_supported_band *sband,
152 struct ieee80211_channel *channel,
53b954ee 153 const struct ieee80211_ht_cap *ht_cap,
6565ec9b
JB		 154 const struct ieee80211_ht_operation *ht_oper,
155 const struct ieee80211_vht_operation *vht_oper,
5cdaed1e 156 struct cfg80211_chan_def *chandef, bool tracking)
6565ec9b 157{
5cdaed1e 158 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6565ec9b
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,
04a161f4
JB		 1049 u64 timestamp, struct ieee802_11_elems *elems,
1050 bool beacon)
cc32abd4 1051{
b4f286a1 1052 struct ieee80211_local *local = sdata->local;
cc32abd4 1053 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
37799e52 1054 struct cfg80211_bss *cbss = ifmgd->associated;
4c3ebc56 1055 struct ieee80211_chanctx_conf *conf;
55de908a 1056 struct ieee80211_chanctx *chanctx;
e6b7cde4 1057 enum ieee80211_band current_band;
c0f17eb9 1058 struct ieee80211_csa_ie csa_ie;
e6b7cde4 1059 int res;
cc32abd4 1060
8d61ffa5 1061 sdata_assert_lock(sdata);
77fdaa12 1062
37799e52 1063 if (!cbss)
cc32abd4
JB		 1064 return;
1065
b4f286a1 1066 if (local->scanning)
cc32abd4
JB		 1067 return;
1068
37799e52 1069 /* disregard subsequent announcements if we are already processing */
3e2a0226 1070 if (sdata->vif.csa_active)
cc32abd4
JB		 1071 return;
1072
e6b7cde4 1073 current_band = cbss->channel->band;
c0f17eb9 1074 memset(&csa_ie, 0, sizeof(csa_ie));
84469a45 1075 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band,
e6b7cde4 1076 ifmgd->flags,
c0f17eb9 1077 ifmgd->associated->bssid, &csa_ie);
e6b7cde4 1078 if (res < 0)
b4f286a1 1079 ieee80211_queue_work(&local->hw,
882a7c69 1080 &ifmgd->csa_connection_drop_work);
e6b7cde4 1081 if (res)
cc32abd4 1082 return;
cd64f2a9 1083
c0f17eb9 1084 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
85220d71
JB		 1085 IEEE80211_CHAN_DISABLED)) {
1086 sdata_info(sdata,
1087 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
e6b7cde4 1088 ifmgd->associated->bssid,
c0f17eb9
CYY		 1089 csa_ie.chandef.chan->center_freq,
1090 csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1091 csa_ie.chandef.center_freq2);
85220d71
JB		 1092 ieee80211_queue_work(&local->hw,
1093 &ifmgd->csa_connection_drop_work);
1094 return;
1095 }
1096
4c3ebc56 1097 mutex_lock(&local->mtx);
7578d575 1098 mutex_lock(&local->chanctx_mtx);
4c3ebc56
MK		 1099 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1100 lockdep_is_held(&local->chanctx_mtx));
1101 if (!conf) {
1102 sdata_info(sdata,
1103 "no channel context assigned to vif?, disconnecting\n");
1104 ieee80211_queue_work(&local->hw,
1105 &ifmgd->csa_connection_drop_work);
1106 mutex_unlock(&local->chanctx_mtx);
1107 mutex_unlock(&local->mtx);
1108 return;
1109 }
1110
1111 chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1112
b4f286a1 1113 if (local->use_chanctx) {
7578d575
AN		 1114 u32 num_chanctx = 0;
1115 list_for_each_entry(chanctx, &local->chanctx_list, list)
1116 num_chanctx++;
1117
1118 if (num_chanctx > 1 ||
1119 !(local->hw.flags & IEEE80211_HW_CHANCTX_STA_CSA)) {
1120 sdata_info(sdata,
1121 "not handling chan-switch with channel contexts\n");
1122 ieee80211_queue_work(&local->hw,
1123 &ifmgd->csa_connection_drop_work);
1124 mutex_unlock(&local->chanctx_mtx);
4c3ebc56 1125 mutex_unlock(&local->mtx);
7578d575
AN		 1126 return;
1127 }
55de908a
JB		 1128 }
1129
4c3ebc56
MK		 1130 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1131 chanctx->mode, false);
1132 if (res) {
55de908a 1133 sdata_info(sdata,
4c3ebc56
MK		 1134 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1135 res);
b4f286a1 1136 ieee80211_queue_work(&local->hw,
55de908a 1137 &ifmgd->csa_connection_drop_work);
b4f286a1 1138 mutex_unlock(&local->chanctx_mtx);
4c3ebc56 1139 mutex_unlock(&local->mtx);
55de908a
JB		 1140 return;
1141 }
b4f286a1 1142 mutex_unlock(&local->chanctx_mtx);
55de908a 1143
c46a73f3 1144 sdata->vif.csa_active = true;
4c3ebc56 1145 sdata->csa_chandef = csa_ie.chandef;
59af6928 1146 sdata->csa_block_tx = csa_ie.mode;
55de908a 1147
59af6928 1148 if (sdata->csa_block_tx)
a46992b4
LC		 1149 ieee80211_stop_vif_queues(local, sdata,
1150 IEEE80211_QUEUE_STOP_REASON_CSA);
59af6928 1151 mutex_unlock(&local->mtx);
57eebdf3 1152
b4f286a1 1153 if (local->ops->channel_switch) {
5ce6e438 1154 /* use driver's channel switch callback */
57eebdf3
JB		 1155 struct ieee80211_channel_switch ch_switch = {
1156 .timestamp = timestamp,
c0f17eb9
CYY		 1157 .block_tx = csa_ie.mode,
1158 .chandef = csa_ie.chandef,
1159 .count = csa_ie.count,
57eebdf3
JB		 1160 };
1161
b4f286a1 1162 drv_channel_switch(local, &ch_switch);
5ce6e438
JB		 1163 return;
1164 }
1165
1166 /* channel switch handled in software */
c0f17eb9 1167 if (csa_ie.count <= 1)
b4f286a1 1168 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
57eebdf3 1169 else
cc32abd4 1170 mod_timer(&ifmgd->chswitch_timer,
ff1e417c
LC		 1171 TU_TO_EXP_TIME((csa_ie.count - 1) *
1172 cbss->beacon_interval));
cc32abd4
JB		 1173}
1174
24a4e400
SG		 1175static bool
1176ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1177 struct ieee80211_channel *channel,
1178 const u8 *country_ie, u8 country_ie_len,
1179 const u8 *pwr_constr_elem,
1180 int *chan_pwr, int *pwr_reduction)
cc32abd4 1181{
04b7b2ff
JB		 1182 struct ieee80211_country_ie_triplet *triplet;
1183 int chan = ieee80211_frequency_to_channel(channel->center_freq);
24a4e400 1184 int i, chan_increment;
04b7b2ff 1185 bool have_chan_pwr = false;
cc32abd4 1186
04b7b2ff
JB		 1187 /* Invalid IE */
1188 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
24a4e400 1189 return false;
cc32abd4 1190
04b7b2ff
JB		 1191 triplet = (void *)(country_ie + 3);
1192 country_ie_len -= 3;
1193
1194 switch (channel->band) {
1195 default:
1196 WARN_ON_ONCE(1);
1197 /* fall through */
1198 case IEEE80211_BAND_2GHZ:
1199 case IEEE80211_BAND_60GHZ:
1200 chan_increment = 1;
1201 break;
1202 case IEEE80211_BAND_5GHZ:
1203 chan_increment = 4;
1204 break;
cc32abd4 1205 }
04b7b2ff
JB		 1206
1207 /* find channel */
1208 while (country_ie_len >= 3) {
1209 u8 first_channel = triplet->chans.first_channel;
1210
1211 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1212 goto next;
1213
1214 for (i = 0; i < triplet->chans.num_channels; i++) {
1215 if (first_channel + i * chan_increment == chan) {
1216 have_chan_pwr = true;
24a4e400 1217 *chan_pwr = triplet->chans.max_power;
04b7b2ff
JB		 1218 break;
1219 }
1220 }
1221 if (have_chan_pwr)
1222 break;
1223
1224 next:
1225 triplet++;
1226 country_ie_len -= 3;
1227 }
1228
24a4e400
SG		 1229 if (have_chan_pwr)
1230 *pwr_reduction = *pwr_constr_elem;
1231 return have_chan_pwr;
1232}
1233
c8d65917
SG		 1234static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
1235 struct ieee80211_channel *channel,
1236 const u8 *cisco_dtpc_ie,
1237 int *pwr_level)
1238{
1239 /* From practical testing, the first data byte of the DTPC element
1240 * seems to contain the requested dBm level, and the CLI on Cisco
1241 * APs clearly state the range is -127 to 127 dBm, which indicates
1242 * a signed byte, although it seemingly never actually goes negative.
1243 * The other byte seems to always be zero.
1244 */
1245 *pwr_level = (__s8)cisco_dtpc_ie[4];
1246}
1247
24a4e400
SG		 1248static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1249 struct ieee80211_channel *channel,
1250 struct ieee80211_mgmt *mgmt,
1251 const u8 *country_ie, u8 country_ie_len,
c8d65917
SG		 1252 const u8 *pwr_constr_ie,
1253 const u8 *cisco_dtpc_ie)
24a4e400 1254{
c8d65917
SG		 1255 bool has_80211h_pwr = false, has_cisco_pwr = false;
1256 int chan_pwr = 0, pwr_reduction_80211h = 0;
1257 int pwr_level_cisco, pwr_level_80211h;
24a4e400 1258 int new_ap_level;
04b7b2ff 1259
24a4e400
SG		 1260 if (country_ie && pwr_constr_ie &&
1261 mgmt->u.probe_resp.capab_info &
1262 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT)) {
1263 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
1264 sdata, channel, country_ie, country_ie_len,
1265 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
c8d65917
SG		 1266 pwr_level_80211h =
1267 max_t(int, 0, chan_pwr - pwr_reduction_80211h);
1268 }
1269
1270 if (cisco_dtpc_ie) {
1271 ieee80211_find_cisco_dtpc(
1272 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
1273 has_cisco_pwr = true;
24a4e400 1274 }
04b7b2ff 1275
c8d65917 1276 if (!has_80211h_pwr && !has_cisco_pwr)
1ea6f9c0 1277 return 0;
04b7b2ff 1278
c8d65917
SG		 1279 /* If we have both 802.11h and Cisco DTPC, apply both limits
1280 * by picking the smallest of the two power levels advertised.
1281 */
1282 if (has_80211h_pwr &&
1283 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
1284 sdata_info(sdata,
1285 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1286 pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
1287 sdata->u.mgd.bssid);
1288 new_ap_level = pwr_level_80211h;
1289 } else { /* has_cisco_pwr is always true here. */
1290 sdata_info(sdata,
1291 "Limiting TX power to %d dBm as advertised by %pM\n",
1292 pwr_level_cisco, sdata->u.mgd.bssid);
1293 new_ap_level = pwr_level_cisco;
1294 }
04b7b2ff 1295
1ea6f9c0
JB		 1296 if (sdata->ap_power_level == new_ap_level)
1297 return 0;
04b7b2ff 1298
1ea6f9c0
JB		 1299 sdata->ap_power_level = new_ap_level;
1300 if (__ieee80211_recalc_txpower(sdata))
1301 return BSS_CHANGED_TXPOWER;
1302 return 0;
cc32abd4
JB		 1303}
1304
965bedad
JB		 1305/* powersave */
1306static void ieee80211_enable_ps(struct ieee80211_local *local,
1307 struct ieee80211_sub_if_data *sdata)
1308{
1309 struct ieee80211_conf *conf = &local->hw.conf;
1310
d5edaedc
JB		 1311 /*
1312 * If we are scanning right now then the parameters will
1313 * take effect when scan finishes.
1314 */
fbe9c429 1315 if (local->scanning)
d5edaedc
JB		 1316 return;
1317
965bedad
JB		 1318 if (conf->dynamic_ps_timeout > 0 &&
1319 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
1320 mod_timer(&local->dynamic_ps_timer, jiffies +
1321 msecs_to_jiffies(conf->dynamic_ps_timeout));
1322 } else {
1323 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1324 ieee80211_send_nullfunc(local, sdata, 1);
375177bf 1325
2a13052f
JO		 1326 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1327 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
1328 return;
1329
1330 conf->flags |= IEEE80211_CONF_PS;
1331 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965bedad
JB		 1332 }
1333}
1334
1335static void ieee80211_change_ps(struct ieee80211_local *local)
1336{
1337 struct ieee80211_conf *conf = &local->hw.conf;
1338
1339 if (local->ps_sdata) {
965bedad
JB		 1340 ieee80211_enable_ps(local, local->ps_sdata);
1341 } else if (conf->flags & IEEE80211_CONF_PS) {
1342 conf->flags &= ~IEEE80211_CONF_PS;
1343 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1344 del_timer_sync(&local->dynamic_ps_timer);
1345 cancel_work_sync(&local->dynamic_ps_enable_work);
1346 }
1347}
1348
808118cb
JY		 1349static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1350{
1351 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1352 struct sta_info *sta = NULL;
c2c98fde 1353 bool authorized = false;
808118cb
JY		 1354
1355 if (!mgd->powersave)
1356 return false;
1357
05cb9108
JB		 1358 if (mgd->broken_ap)
1359 return false;
1360
808118cb
JY		 1361 if (!mgd->associated)
1362 return false;
1363
392b9ffb 1364 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
808118cb
JY		 1365 return false;
1366
989c6505 1367 if (!mgd->have_beacon)
ce857888
AB		 1368 return false;
1369
808118cb
JY		 1370 rcu_read_lock();
1371 sta = sta_info_get(sdata, mgd->bssid);
1372 if (sta)
c2c98fde 1373 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
808118cb
JY		 1374 rcu_read_unlock();
1375
c2c98fde 1376 return authorized;
808118cb
JY		 1377}
1378
965bedad 1379/* need to hold RTNL or interface lock */
10f644a4 1380void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 1381{
1382 struct ieee80211_sub_if_data *sdata, *found = NULL;
1383 int count = 0;
195e294d 1384 int timeout;
965bedad
JB		 1385
1386 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
1387 local->ps_sdata = NULL;
1388 return;
1389 }
1390
1391 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 1392 if (!ieee80211_sdata_running(sdata))
965bedad 1393 continue;
8c7914de
RM		 1394 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1395 /* If an AP vif is found, then disable PS
1396 * by setting the count to zero thereby setting
1397 * ps_sdata to NULL.
1398 */
1399 count = 0;
1400 break;
1401 }
965bedad
JB		 1402 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1403 continue;
1404 found = sdata;
1405 count++;
1406 }
1407
808118cb 1408 if (count == 1 && ieee80211_powersave_allowed(found)) {
10f644a4
JB		 1409 s32 beaconint_us;
1410
1411 if (latency < 0)
ed77134b 1412 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
10f644a4
JB		 1413
1414 beaconint_us = ieee80211_tu_to_usec(
1415 found->vif.bss_conf.beacon_int);
1416
ff616381 1417 timeout = local->dynamic_ps_forced_timeout;
195e294d
JO		 1418 if (timeout < 0) {
1419 /*
ff616381
JO		 1420 * Go to full PSM if the user configures a very low
1421 * latency requirement.
0ab82b04
EP		 1422 * The 2000 second value is there for compatibility
1423 * until the PM_QOS_NETWORK_LATENCY is configured
1424 * with real values.
195e294d 1425 */
0ab82b04
EP		 1426 if (latency > (1900 * USEC_PER_MSEC) &&
1427 latency != (2000 * USEC_PER_SEC))
195e294d 1428 timeout = 0;
ff616381
JO		 1429 else
1430 timeout = 100;
195e294d 1431 }
09b85568 1432 local->hw.conf.dynamic_ps_timeout = timeout;
195e294d 1433
04fe2037 1434 if (beaconint_us > latency) {
10f644a4 1435 local->ps_sdata = NULL;
04fe2037 1436 } else {
04fe2037 1437 int maxslp = 1;
826262c3 1438 u8 dtimper = found->u.mgd.dtim_period;
56007a02
JB		 1439
1440 /* If the TIM IE is invalid, pretend the value is 1 */
1441 if (!dtimper)
1442 dtimper = 1;
1443 else if (dtimper > 1)
04fe2037
JB		 1444 maxslp = min_t(int, dtimper,
1445 latency / beaconint_us);
1446
9ccebe61 1447 local->hw.conf.max_sleep_period = maxslp;
56007a02 1448 local->hw.conf.ps_dtim_period = dtimper;
10f644a4 1449 local->ps_sdata = found;
04fe2037 1450 }
10f644a4 1451 } else {
965bedad 1452 local->ps_sdata = NULL;
10f644a4 1453 }
965bedad
JB		 1454
1455 ieee80211_change_ps(local);
1456}
1457
ab095877
EP		 1458void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1459{
1460 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1461
1462 if (sdata->vif.bss_conf.ps != ps_allowed) {
1463 sdata->vif.bss_conf.ps = ps_allowed;
1464 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1465 }
1466}
1467
965bedad
JB		 1468void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1469{
1470 struct ieee80211_local *local =
1471 container_of(work, struct ieee80211_local,
1472 dynamic_ps_disable_work);
1473
1474 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1475 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1476 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1477 }
1478
1479 ieee80211_wake_queues_by_reason(&local->hw,
445ea4e8 1480 IEEE80211_MAX_QUEUE_MAP,
cca07b00
LC		 1481 IEEE80211_QUEUE_STOP_REASON_PS,
1482 false);
965bedad
JB		 1483}
1484
1485void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1486{
1487 struct ieee80211_local *local =
1488 container_of(work, struct ieee80211_local,
1489 dynamic_ps_enable_work);
1490 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
5e34069c 1491 struct ieee80211_if_managed *ifmgd;
1ddc2867
RM		 1492 unsigned long flags;
1493 int q;
965bedad
JB		 1494
1495 /* can only happen when PS was just disabled anyway */
1496 if (!sdata)
1497 return;
1498
5e34069c
CL		 1499 ifmgd = &sdata->u.mgd;
1500
965bedad
JB		 1501 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1502 return;
1503
09b85568 1504 if (local->hw.conf.dynamic_ps_timeout > 0) {
77b7023a
AN		 1505 /* don't enter PS if TX frames are pending */
1506 if (drv_tx_frames_pending(local)) {
1ddc2867
RM		 1507 mod_timer(&local->dynamic_ps_timer, jiffies +
1508 msecs_to_jiffies(
1509 local->hw.conf.dynamic_ps_timeout));
1510 return;
1511 }
77b7023a
AN		 1512
1513 /*
1514 * transmission can be stopped by others which leads to
1515 * dynamic_ps_timer expiry. Postpone the ps timer if it
1516 * is not the actual idle state.
1517 */
1518 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1519 for (q = 0; q < local->hw.queues; q++) {
1520 if (local->queue_stop_reasons[q]) {
1521 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1522 flags);
1523 mod_timer(&local->dynamic_ps_timer, jiffies +
1524 msecs_to_jiffies(
1525 local->hw.conf.dynamic_ps_timeout));
1526 return;
1527 }
1528 }
1529 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1ddc2867 1530 }
1ddc2867 1531
375177bf 1532 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
9c38a8b4 1533 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
a1598383 1534 if (drv_tx_frames_pending(local)) {
e8306f98
VN		 1535 mod_timer(&local->dynamic_ps_timer, jiffies +
1536 msecs_to_jiffies(
1537 local->hw.conf.dynamic_ps_timeout));
a1598383 1538 } else {
e8306f98
VN		 1539 ieee80211_send_nullfunc(local, sdata, 1);
1540 /* Flush to get the tx status of nullfunc frame */
39ecc01d 1541 ieee80211_flush_queues(local, sdata);
e8306f98 1542 }
f3e85b9e
VN		 1543 }
1544
2a13052f
JO		 1545 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1546 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
375177bf
VN		 1547 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1548 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1549 local->hw.conf.flags |= IEEE80211_CONF_PS;
1550 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1551 }
965bedad
JB		 1552}
1553
1554void ieee80211_dynamic_ps_timer(unsigned long data)
1555{
1556 struct ieee80211_local *local = (void *) data;
1557
78f1a8b7 1558 if (local->quiescing || local->suspended)
5bb644a0
JB		 1559 return;
1560
42935eca 1561 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 1562}
1563
164eb02d
SW		 1564void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1565{
1566 struct delayed_work *delayed_work =
1567 container_of(work, struct delayed_work, work);
1568 struct ieee80211_sub_if_data *sdata =
1569 container_of(delayed_work, struct ieee80211_sub_if_data,
1570 dfs_cac_timer_work);
d2859df5 1571 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
164eb02d 1572
34a3740d
JB		 1573 mutex_lock(&sdata->local->mtx);
1574 if (sdata->wdev.cac_started) {
1575 ieee80211_vif_release_channel(sdata);
1576 cfg80211_cac_event(sdata->dev, &chandef,
1577 NL80211_RADAR_CAC_FINISHED,
1578 GFP_KERNEL);
1579 }
1580 mutex_unlock(&sdata->local->mtx);
164eb02d
SW		 1581}
1582
60f8b39c 1583/* MLME */
7d25745d 1584static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
4ced3f74 1585 struct ieee80211_sub_if_data *sdata,
4a3cb702 1586 const u8 *wmm_param, size_t wmm_param_len)
f0706e82 1587{
f0706e82 1588 struct ieee80211_tx_queue_params params;
4ced3f74 1589 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1590 size_t left;
1591 int count;
4a3cb702
JB		 1592 const u8 *pos;
1593 u8 uapsd_queues = 0;
f0706e82 1594
e1b3ec1a 1595 if (!local->ops->conf_tx)
7d25745d 1596 return false;
e1b3ec1a 1597
32c5057b 1598 if (local->hw.queues < IEEE80211_NUM_ACS)
7d25745d 1599 return false;
3434fbd3
JB		 1600
1601 if (!wmm_param)
7d25745d 1602 return false;
3434fbd3 1603
f0706e82 1604 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
7d25745d 1605 return false;
ab13315a
KV		 1606
1607 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
dc41e4d4 1608 uapsd_queues = ifmgd->uapsd_queues;
ab13315a 1609
f0706e82 1610 count = wmm_param[6] & 0x0f;
46900298 1611 if (count == ifmgd->wmm_last_param_set)
7d25745d 1612 return false;
46900298 1613 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 1614
1615 pos = wmm_param + 8;
1616 left = wmm_param_len - 8;
1617
1618 memset(&params, 0, sizeof(params));
1619
00e96dec 1620 sdata->wmm_acm = 0;
f0706e82
JB		 1621 for (; left >= 4; left -= 4, pos += 4) {
1622 int aci = (pos[0] >> 5) & 0x03;
1623 int acm = (pos[0] >> 4) & 0x01;
ab13315a 1624 bool uapsd = false;
f0706e82
JB		 1625 int queue;
1626
1627 switch (aci) {
0eeb59fe 1628 case 1: /* AC_BK */
e100bb64 1629 queue = 3;
988c0f72 1630 if (acm)
00e96dec 1631 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV		 1632 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1633 uapsd = true;
f0706e82 1634 break;
0eeb59fe 1635 case 2: /* AC_VI */
e100bb64 1636 queue = 1;
988c0f72 1637 if (acm)
00e96dec 1638 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV		 1639 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1640 uapsd = true;
f0706e82 1641 break;
0eeb59fe 1642 case 3: /* AC_VO */
e100bb64 1643 queue = 0;
988c0f72 1644 if (acm)
00e96dec 1645 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV		 1646 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1647 uapsd = true;
f0706e82 1648 break;
0eeb59fe 1649 case 0: /* AC_BE */
f0706e82 1650 default:
e100bb64 1651 queue = 2;
988c0f72 1652 if (acm)
00e96dec 1653 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV		 1654 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1655 uapsd = true;
f0706e82
JB		 1656 break;
1657 }
1658
1659 params.aifs = pos[0] & 0x0f;
1660 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1661 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 1662 params.txop = get_unaligned_le16(pos + 2);
908f8d07 1663 params.acm = acm;
ab13315a
KV		 1664 params.uapsd = uapsd;
1665
bdcbd8e0
JB		 1666 mlme_dbg(sdata,
1667 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1668 queue, aci, acm,
1669 params.aifs, params.cw_min, params.cw_max,
1670 params.txop, params.uapsd);
f6f3def3
EP		 1671 sdata->tx_conf[queue] = params;
1672 if (drv_conf_tx(local, sdata, queue, &params))
bdcbd8e0
JB		 1673 sdata_err(sdata,
1674 "failed to set TX queue parameters for queue %d\n",
1675 queue);
f0706e82 1676 }
e1b3ec1a
SG		 1677
1678 /* enable WMM or activate new settings */
4ced3f74 1679 sdata->vif.bss_conf.qos = true;
7d25745d 1680 return true;
f0706e82
JB		 1681}
1682
925e64c3
SG		 1683static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1684{
1685 lockdep_assert_held(&sdata->local->mtx);
1686
392b9ffb 1687 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
925e64c3
SG		 1688 ieee80211_run_deferred_scan(sdata->local);
1689}
1690
1691static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1692{
1693 mutex_lock(&sdata->local->mtx);
1694 __ieee80211_stop_poll(sdata);
1695 mutex_unlock(&sdata->local->mtx);
1696}
1697
7a5158ef
JB		 1698static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1699 u16 capab, bool erp_valid, u8 erp)
5628221c 1700{
bda3933a 1701 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 1702 u32 changed = 0;
7a5158ef
JB		 1703 bool use_protection;
1704 bool use_short_preamble;
1705 bool use_short_slot;
1706
1707 if (erp_valid) {
1708 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1709 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1710 } else {
1711 use_protection = false;
1712 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1713 }
1714
1715 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
55de908a 1716 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
43d35343 1717 use_short_slot = true;
5628221c 1718
471b3efd 1719 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 1720 bss_conf->use_cts_prot = use_protection;
1721 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 1722 }
7e9ed188 1723
d43c7b37 1724 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 1725 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 1726 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 1727 }
d9430a32 1728
7a5158ef 1729 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 1730 bss_conf->use_short_slot = use_short_slot;
1731 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 1732 }
1733
1734 return changed;
1735}
1736
f698d856 1737static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 1738 struct cfg80211_bss *cbss,
ae5eb026 1739 u32 bss_info_changed)
f0706e82 1740{
0c1ad2ca 1741 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 1742 struct ieee80211_local *local = sdata->local;
68542962 1743 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
d6f2da5b 1744
ae5eb026 1745 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 1746 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
50ae34a2 1747 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 1748
7ccc8bd7 1749 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
59c1ec2b 1750 beacon_loss_count * bss_conf->beacon_int));
7ccc8bd7 1751
0c1ad2ca
JB		 1752 sdata->u.mgd.associated = cbss;
1753 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 1754
17e4ec14
JM		 1755 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1756
488dd7b5 1757 if (sdata->vif.p2p) {
9caf0364 1758 const struct cfg80211_bss_ies *ies;
488dd7b5 1759
9caf0364
JB		 1760 rcu_read_lock();
1761 ies = rcu_dereference(cbss->ies);
1762 if (ies) {
9caf0364
JB		 1763 int ret;
1764
1765 ret = cfg80211_get_p2p_attr(
1766 ies->data, ies->len,
1767 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
67baf663
JD		 1768 (u8 *) &bss_conf->p2p_noa_attr,
1769 sizeof(bss_conf->p2p_noa_attr));
9caf0364 1770 if (ret >= 2) {
67baf663
JD		 1771 sdata->u.mgd.p2p_noa_index =
1772 bss_conf->p2p_noa_attr.index;
9caf0364 1773 bss_info_changed |= BSS_CHANGED_P2P_PS;
9caf0364 1774 }
488dd7b5 1775 }
9caf0364 1776 rcu_read_unlock();
488dd7b5
JB		 1777 }
1778
b291ba11 1779 /* just to be sure */
925e64c3 1780 ieee80211_stop_poll(sdata);
b291ba11 1781
9ac19a90 1782 ieee80211_led_assoc(local, 1);
9306102e 1783
989c6505 1784 if (sdata->u.mgd.have_beacon) {
826262c3
JB		 1785 /*
1786 * If the AP is buggy we may get here with no DTIM period
1787 * known, so assume it's 1 which is the only safe assumption
1788 * in that case, although if the TIM IE is broken powersave
1789 * probably just won't work at all.
1790 */
1791 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
817cee76 1792 bss_conf->beacon_rate = bss->beacon_rate;
989c6505 1793 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
826262c3 1794 } else {
817cee76 1795 bss_conf->beacon_rate = NULL;
e5b900d2 1796 bss_conf->dtim_period = 0;
826262c3 1797 }
e5b900d2 1798
68542962 1799 bss_conf->assoc = 1;
9cef8737 1800
a97c13c3 1801 /* Tell the driver to monitor connection quality (if supported) */
ea086359 1802 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
68542962 1803 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 1804 bss_info_changed |= BSS_CHANGED_CQM;
1805
68542962 1806 /* Enable ARP filtering */
0f19b41e 1807 if (bss_conf->arp_addr_cnt)
68542962 1808 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
68542962 1809
ae5eb026 1810 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 1811
056508dc
JB		 1812 mutex_lock(&local->iflist_mtx);
1813 ieee80211_recalc_ps(local, -1);
1814 mutex_unlock(&local->iflist_mtx);
e0cb686f 1815
04ecd257 1816 ieee80211_recalc_smps(sdata);
ab095877
EP		 1817 ieee80211_recalc_ps_vif(sdata);
1818
9ac19a90 1819 netif_carrier_on(sdata->dev);
f0706e82
JB		 1820}
1821
e69e95db 1822static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
37ad3888
JB		 1823 u16 stype, u16 reason, bool tx,
1824 u8 *frame_buf)
aa458d17 1825{
46900298 1826 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17 1827 struct ieee80211_local *local = sdata->local;
3cc5240b 1828 u32 changed = 0;
aa458d17 1829
8d61ffa5 1830 sdata_assert_lock(sdata);
77fdaa12 1831
37ad3888
JB		 1832 if (WARN_ON_ONCE(tx && !frame_buf))
1833 return;
1834
b291ba11
JB		 1835 if (WARN_ON(!ifmgd->associated))
1836 return;
1837
79543d8e
DS		 1838 ieee80211_stop_poll(sdata);
1839
77fdaa12 1840 ifmgd->associated = NULL;
aa458d17
TW		 1841 netif_carrier_off(sdata->dev);
1842
88bc40e8
EP		 1843 /*
1844 * if we want to get out of ps before disassoc (why?) we have
1845 * to do it before sending disassoc, as otherwise the null-packet
1846 * won't be valid.
1847 */
1848 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1849 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1850 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1851 }
1852 local->ps_sdata = NULL;
1853
ab095877
EP		 1854 /* disable per-vif ps */
1855 ieee80211_recalc_ps_vif(sdata);
1856
f823981e
EP		 1857 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1858 if (tx)
39ecc01d 1859 ieee80211_flush_queues(local, sdata);
f823981e 1860
37ad3888
JB		 1861 /* deauthenticate/disassociate now */
1862 if (tx || frame_buf)
88a9e31c
EP		 1863 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
1864 reason, tx, frame_buf);
37ad3888
JB		 1865
1866 /* flush out frame */
1867 if (tx)
39ecc01d 1868 ieee80211_flush_queues(local, sdata);
37ad3888 1869
88a9e31c
EP		 1870 /* clear bssid only after building the needed mgmt frames */
1871 memset(ifmgd->bssid, 0, ETH_ALEN);
1872
37ad3888 1873 /* remove AP and TDLS peers */
d34ba216 1874 sta_info_flush(sdata);
37ad3888
JB		 1875
1876 /* finally reset all BSS / config parameters */
f5e5bf25
TW		 1877 changed |= ieee80211_reset_erp_info(sdata);
1878
f5e5bf25 1879 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 1880 changed |= BSS_CHANGED_ASSOC;
1881 sdata->vif.bss_conf.assoc = false;
f5e5bf25 1882
67baf663
JD		 1883 ifmgd->p2p_noa_index = -1;
1884 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
1885 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
488dd7b5 1886
dd5ecfea 1887 /* on the next assoc, re-program HT/VHT parameters */
ef96a842
BG		 1888 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1889 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
dd5ecfea
JB		 1890 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
1891 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
413ad50a 1892
1ea6f9c0 1893 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
a8302de9 1894
520eb820
KV		 1895 del_timer_sync(&local->dynamic_ps_timer);
1896 cancel_work_sync(&local->dynamic_ps_enable_work);
1897
68542962 1898 /* Disable ARP filtering */
0f19b41e 1899 if (sdata->vif.bss_conf.arp_addr_cnt)
68542962 1900 changed |= BSS_CHANGED_ARP_FILTER;
68542962 1901
3abead59
JB		 1902 sdata->vif.bss_conf.qos = false;
1903 changed |= BSS_CHANGED_QOS;
1904
0aaffa9b
JB		 1905 /* The BSSID (not really interesting) and HT changed */
1906 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 1907 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 1908
3abead59
JB		 1909 /* disassociated - set to defaults now */
1910 ieee80211_set_wmm_default(sdata, false);
1911
b9dcf712
JB		 1912 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1913 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1914 del_timer_sync(&sdata->u.mgd.timer);
1915 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2d9957cc 1916
826262c3 1917 sdata->vif.bss_conf.dtim_period = 0;
817cee76
AB		 1918 sdata->vif.bss_conf.beacon_rate = NULL;
1919
989c6505 1920 ifmgd->have_beacon = false;
826262c3 1921
028e8da0 1922 ifmgd->flags = 0;
34a3740d 1923 mutex_lock(&local->mtx);
028e8da0 1924 ieee80211_vif_release_channel(sdata);
59af6928
MK		 1925
1926 sdata->vif.csa_active = false;
a46992b4
LC		 1927 if (sdata->csa_block_tx) {
1928 ieee80211_wake_vif_queues(local, sdata,
1929 IEEE80211_QUEUE_STOP_REASON_CSA);
1930 sdata->csa_block_tx = false;
1931 }
34a3740d 1932 mutex_unlock(&local->mtx);
2475b1cc
MS		 1933
1934 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
aa458d17 1935}
f0706e82 1936
3cf335d5
KV		 1937void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1938 struct ieee80211_hdr *hdr)
1939{
1940 /*
1941 * We can postpone the mgd.timer whenever receiving unicast frames
1942 * from AP because we know that the connection is working both ways
1943 * at that time. But multicast frames (and hence also beacons) must
1944 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 1945 * data idle periods for sending the periodic probe request to the
1946 * AP we're connected to.
3cf335d5 1947 */
b291ba11
JB		 1948 if (is_multicast_ether_addr(hdr->addr1))
1949 return;
1950
be099e82 1951 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 1952}
f0706e82 1953
4e5ff376
FF		 1954static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1955{
1956 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
133d40f9 1957 struct ieee80211_local *local = sdata->local;
4e5ff376 1958
133d40f9 1959 mutex_lock(&local->mtx);
392b9ffb
SG		 1960 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
1961 goto out;
4e5ff376 1962
925e64c3 1963 __ieee80211_stop_poll(sdata);
133d40f9
SG		 1964
1965 mutex_lock(&local->iflist_mtx);
1966 ieee80211_recalc_ps(local, -1);
1967 mutex_unlock(&local->iflist_mtx);
4e5ff376
FF		 1968
1969 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
133d40f9 1970 goto out;
4e5ff376
FF		 1971
1972 /*
1973 * We've received a probe response, but are not sure whether
1974 * we have or will be receiving any beacons or data, so let's
1975 * schedule the timers again, just in case.
1976 */
1977 ieee80211_sta_reset_beacon_monitor(sdata);
1978
1979 mod_timer(&ifmgd->conn_mon_timer,
1980 round_jiffies_up(jiffies +
1981 IEEE80211_CONNECTION_IDLE_TIME));
133d40f9 1982out:
133d40f9 1983 mutex_unlock(&local->mtx);
4e5ff376
FF		 1984}
1985
1986void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
04ac3c0e 1987 struct ieee80211_hdr *hdr, bool ack)
4e5ff376 1988{
75706d0e 1989 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF		 1990 return;
1991
4e5ff376
FF		 1992 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1993 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e 1994 if (ack)
cab1c7fd 1995 ieee80211_sta_reset_conn_monitor(sdata);
04ac3c0e
FF		 1996 else
1997 sdata->u.mgd.nullfunc_failed = true;
4e5ff376 1998 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
cab1c7fd 1999 return;
4e5ff376 2000 }
cab1c7fd
WD		 2001
2002 if (ack)
2003 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF		 2004}
2005
a43abf29
ML		 2006static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2007{
2008 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2009 const u8 *ssid;
f01a067d 2010 u8 *dst = ifmgd->associated->bssid;
180205bd 2011 u8 unicast_limit = max(1, max_probe_tries - 3);
f01a067d
LR		 2012
2013 /*
2014 * Try sending broadcast probe requests for the last three
2015 * probe requests after the first ones failed since some
2016 * buggy APs only support broadcast probe requests.
2017 */
2018 if (ifmgd->probe_send_count >= unicast_limit)
2019 dst = NULL;
a43abf29 2020
4e5ff376
FF		 2021 /*
2022 * When the hardware reports an accurate Tx ACK status, it's
2023 * better to send a nullfunc frame instead of a probe request,
2024 * as it will kick us off the AP quickly if we aren't associated
2025 * anymore. The timeout will be reset if the frame is ACKed by
2026 * the AP.
2027 */
992e68bf
SD		 2028 ifmgd->probe_send_count++;
2029
04ac3c0e
FF		 2030 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2031 ifmgd->nullfunc_failed = false;
4e5ff376 2032 ieee80211_send_nullfunc(sdata->local, sdata, 0);
04ac3c0e 2033 } else {
88c868c4
SG		 2034 int ssid_len;
2035
9caf0364 2036 rcu_read_lock();
4e5ff376 2037 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
88c868c4
SG		 2038 if (WARN_ON_ONCE(ssid == NULL))
2039 ssid_len = 0;
2040 else
2041 ssid_len = ssid[1];
2042
2043 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
1672c0e3 2044 0, (u32) -1, true, 0,
55de908a 2045 ifmgd->associated->channel, false);
9caf0364 2046 rcu_read_unlock();
4e5ff376 2047 }
a43abf29 2048
180205bd 2049 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
8d61ffa5 2050 run_again(sdata, ifmgd->probe_timeout);
f69b9c79 2051 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
39ecc01d 2052 ieee80211_flush_queues(sdata->local, sdata);
a43abf29
ML		 2053}
2054
b291ba11
JB		 2055static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2056 bool beacon)
04de8381 2057{
04de8381 2058 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 2059 bool already = false;
34bfc411 2060
9607e6b6 2061 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 2062 return;
2063
8d61ffa5 2064 sdata_lock(sdata);
77fdaa12
JB		 2065
2066 if (!ifmgd->associated)
2067 goto out;
2068
133d40f9
SG		 2069 mutex_lock(&sdata->local->mtx);
2070
2071 if (sdata->local->tmp_channel || sdata->local->scanning) {
2072 mutex_unlock(&sdata->local->mtx);
2073 goto out;
2074 }
2075
a13fbe54 2076 if (beacon) {
bdcbd8e0 2077 mlme_dbg_ratelimited(sdata,
59c1ec2b
BG		 2078 "detected beacon loss from AP (missed %d beacons) - probing\n",
2079 beacon_loss_count);
bdcbd8e0 2080
a13fbe54
BG		 2081 ieee80211_cqm_rssi_notify(&sdata->vif,
2082 NL80211_CQM_RSSI_BEACON_LOSS_EVENT,
2083 GFP_KERNEL);
2084 }
04de8381 2085
b291ba11
JB		 2086 /*
2087 * The driver/our work has already reported this event or the
2088 * connection monitoring has kicked in and we have already sent
2089 * a probe request. Or maybe the AP died and the driver keeps
2090 * reporting until we disassociate...
2091 *
2092 * In either case we have to ignore the current call to this
2093 * function (except for setting the correct probe reason bit)
2094 * because otherwise we would reset the timer every time and
2095 * never check whether we received a probe response!
2096 */
392b9ffb 2097 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
b291ba11
JB		 2098 already = true;
2099
12b5f34d
EP		 2100 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2101
133d40f9
SG		 2102 mutex_unlock(&sdata->local->mtx);
2103
b291ba11
JB		 2104 if (already)
2105 goto out;
2106
4e751843
JB		 2107 mutex_lock(&sdata->local->iflist_mtx);
2108 ieee80211_recalc_ps(sdata->local, -1);
2109 mutex_unlock(&sdata->local->iflist_mtx);
2110
a43abf29
ML		 2111 ifmgd->probe_send_count = 0;
2112 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12 2113 out:
8d61ffa5 2114 sdata_unlock(sdata);
04de8381
KV		 2115}
2116
a619a4c0
JO		 2117struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2118 struct ieee80211_vif *vif)
2119{
2120 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2121 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d9b3b28b 2122 struct cfg80211_bss *cbss;
a619a4c0
JO		 2123 struct sk_buff *skb;
2124 const u8 *ssid;
88c868c4 2125 int ssid_len;
a619a4c0
JO		 2126
2127 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2128 return NULL;
2129
8d61ffa5 2130 sdata_assert_lock(sdata);
a619a4c0 2131
d9b3b28b
EP		 2132 if (ifmgd->associated)
2133 cbss = ifmgd->associated;
2134 else if (ifmgd->auth_data)
2135 cbss = ifmgd->auth_data->bss;
2136 else if (ifmgd->assoc_data)
2137 cbss = ifmgd->assoc_data->bss;
2138 else
a619a4c0
JO		 2139 return NULL;
2140
9caf0364 2141 rcu_read_lock();
d9b3b28b 2142 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
88c868c4
SG		 2143 if (WARN_ON_ONCE(ssid == NULL))
2144 ssid_len = 0;
2145 else
2146 ssid_len = ssid[1];
2147
d9b3b28b 2148 skb = ieee80211_build_probe_req(sdata, cbss->bssid,
55de908a 2149 (u32) -1, cbss->channel,
6b77863b 2150 ssid + 2, ssid_len,
85a237fe 2151 NULL, 0, true);
9caf0364 2152 rcu_read_unlock();
a619a4c0
JO		 2153
2154 return skb;
2155}
2156EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2157
eef9e54c 2158static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
1e4dcd01 2159{
59af6928 2160 struct ieee80211_local *local = sdata->local;
1e4dcd01 2161 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 2162 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
1e4dcd01 2163
8d61ffa5 2164 sdata_lock(sdata);
1e4dcd01 2165 if (!ifmgd->associated) {
8d61ffa5 2166 sdata_unlock(sdata);
1e4dcd01
JO		 2167 return;
2168 }
2169
37ad3888
JB		 2170 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2171 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
eef9e54c 2172 true, frame_buf);
59af6928 2173 mutex_lock(&local->mtx);
7578d575 2174 sdata->vif.csa_active = false;
a46992b4
LC		 2175 if (sdata->csa_block_tx) {
2176 ieee80211_wake_vif_queues(local, sdata,
2177 IEEE80211_QUEUE_STOP_REASON_CSA);
2178 sdata->csa_block_tx = false;
2179 }
59af6928 2180 mutex_unlock(&local->mtx);
7da7cc1d 2181
6ff57cf8
JB		 2182 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
2183 IEEE80211_DEAUTH_FRAME_LEN);
8d61ffa5 2184 sdata_unlock(sdata);
1e4dcd01
JO		 2185}
2186
cc74c0c7 2187static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 2188{
2189 struct ieee80211_sub_if_data *sdata =
2190 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 2191 u.mgd.beacon_connection_loss_work);
a85e1d55
PS		 2192 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2193 struct sta_info *sta;
2194
2195 if (ifmgd->associated) {
30fa9047 2196 rcu_read_lock();
a85e1d55
PS		 2197 sta = sta_info_get(sdata, ifmgd->bssid);
2198 if (sta)
2199 sta->beacon_loss_count++;
30fa9047 2200 rcu_read_unlock();
a85e1d55 2201 }
b291ba11 2202
682bd38b 2203 if (ifmgd->connection_loss) {
882a7c69
JB		 2204 sdata_info(sdata, "Connection to AP %pM lost\n",
2205 ifmgd->bssid);
eef9e54c 2206 __ieee80211_disconnect(sdata);
882a7c69 2207 } else {
1e4dcd01 2208 ieee80211_mgd_probe_ap(sdata, true);
882a7c69
JB		 2209 }
2210}
2211
2212static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2213{
2214 struct ieee80211_sub_if_data *sdata =
2215 container_of(work, struct ieee80211_sub_if_data,
2216 u.mgd.csa_connection_drop_work);
2217
eef9e54c 2218 __ieee80211_disconnect(sdata);
b291ba11
JB		 2219}
2220
04de8381
KV		 2221void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2222{
2223 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 2224 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 2225
b5878a2d
JB		 2226 trace_api_beacon_loss(sdata);
2227
682bd38b 2228 sdata->u.mgd.connection_loss = false;
1e4dcd01 2229 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 2230}
2231EXPORT_SYMBOL(ieee80211_beacon_loss);
2232
1e4dcd01
JO		 2233void ieee80211_connection_loss(struct ieee80211_vif *vif)
2234{
2235 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2236 struct ieee80211_hw *hw = &sdata->local->hw;
2237
b5878a2d
JB		 2238 trace_api_connection_loss(sdata);
2239
682bd38b 2240 sdata->u.mgd.connection_loss = true;
1e4dcd01
JO		 2241 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2242}
2243EXPORT_SYMBOL(ieee80211_connection_loss);
2244
2245
66e67e41
JB		 2246static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2247 bool assoc)
2248{
2249 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2250
8d61ffa5 2251 sdata_assert_lock(sdata);
66e67e41 2252
66e67e41
JB		 2253 if (!assoc) {
2254 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2255
2256 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2257 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
028e8da0 2258 sdata->u.mgd.flags = 0;
34a3740d 2259 mutex_lock(&sdata->local->mtx);
55de908a 2260 ieee80211_vif_release_channel(sdata);
34a3740d 2261 mutex_unlock(&sdata->local->mtx);
66e67e41
JB		 2262 }
2263
5b112d3d 2264 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
66e67e41
JB		 2265 kfree(auth_data);
2266 sdata->u.mgd.auth_data = NULL;
2267}
2268
2269static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2270 struct ieee80211_mgmt *mgmt, size_t len)
2271{
1672c0e3 2272 struct ieee80211_local *local = sdata->local;
66e67e41
JB		 2273 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2274 u8 *pos;
2275 struct ieee802_11_elems elems;
1672c0e3 2276 u32 tx_flags = 0;
66e67e41
JB		 2277
2278 pos = mgmt->u.auth.variable;
b2e506bf 2279 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
66e67e41
JB		 2280 if (!elems.challenge)
2281 return;
2282 auth_data->expected_transaction = 4;
a1845fc7 2283 drv_mgd_prepare_tx(sdata->local, sdata);
1672c0e3
JB		 2284 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2285 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2286 IEEE80211_TX_INTFL_MLME_CONN_TX;
700e8ea6 2287 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
66e67e41
JB		 2288 elems.challenge - 2, elems.challenge_len + 2,
2289 auth_data->bss->bssid, auth_data->bss->bssid,
2290 auth_data->key, auth_data->key_len,
1672c0e3 2291 auth_data->key_idx, tx_flags);
66e67e41
JB		 2292}
2293
8d61ffa5
JB		 2294static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2295 struct ieee80211_mgmt *mgmt, size_t len)
66e67e41
JB		 2296{
2297 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2298 u8 bssid[ETH_ALEN];
2299 u16 auth_alg, auth_transaction, status_code;
2300 struct sta_info *sta;
2301
8d61ffa5 2302 sdata_assert_lock(sdata);
66e67e41
JB		 2303
2304 if (len < 24 + 6)
8d61ffa5 2305 return;
66e67e41
JB		 2306
2307 if (!ifmgd->auth_data || ifmgd->auth_data->done)
8d61ffa5 2308 return;
66e67e41
JB		 2309
2310 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2311
b203ca39 2312 if (!ether_addr_equal(bssid, mgmt->bssid))
8d61ffa5 2313 return;
66e67e41
JB		 2314
2315 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2316 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2317 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2318
2319 if (auth_alg != ifmgd->auth_data->algorithm ||
0f4126e8
JM		 2320 auth_transaction != ifmgd->auth_data->expected_transaction) {
2321 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2322 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2323 auth_transaction,
2324 ifmgd->auth_data->expected_transaction);
8d61ffa5 2325 return;
0f4126e8 2326 }
66e67e41
JB		 2327
2328 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2329 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2330 mgmt->sa, status_code);
dac211ec 2331 ieee80211_destroy_auth_data(sdata, false);
6ff57cf8 2332 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
8d61ffa5 2333 return;
66e67e41
JB		 2334 }
2335
2336 switch (ifmgd->auth_data->algorithm) {
2337 case WLAN_AUTH_OPEN:
2338 case WLAN_AUTH_LEAP:
2339 case WLAN_AUTH_FT:
6b8ece3a 2340 case WLAN_AUTH_SAE:
66e67e41
JB		 2341 break;
2342 case WLAN_AUTH_SHARED_KEY:
2343 if (ifmgd->auth_data->expected_transaction != 4) {
2344 ieee80211_auth_challenge(sdata, mgmt, len);
2345 /* need another frame */
8d61ffa5 2346 return;
66e67e41
JB		 2347 }
2348 break;
2349 default:
2350 WARN_ONCE(1, "invalid auth alg %d",
2351 ifmgd->auth_data->algorithm);
8d61ffa5 2352 return;
66e67e41
JB		 2353 }
2354
bdcbd8e0 2355 sdata_info(sdata, "authenticated\n");
66e67e41
JB		 2356 ifmgd->auth_data->done = true;
2357 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
89afe614 2358 ifmgd->auth_data->timeout_started = true;
8d61ffa5 2359 run_again(sdata, ifmgd->auth_data->timeout);
66e67e41 2360
6b8ece3a
JM		 2361 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2362 ifmgd->auth_data->expected_transaction != 2) {
2363 /*
2364 * Report auth frame to user space for processing since another
2365 * round of Authentication frames is still needed.
2366 */
6ff57cf8 2367 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
8d61ffa5 2368 return;
6b8ece3a
JM		 2369 }
2370
66e67e41
JB		 2371 /* move station state to auth */
2372 mutex_lock(&sdata->local->sta_mtx);
2373 sta = sta_info_get(sdata, bssid);
2374 if (!sta) {
2375 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2376 goto out_err;
2377 }
2378 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
bdcbd8e0 2379 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
66e67e41
JB		 2380 goto out_err;
2381 }
2382 mutex_unlock(&sdata->local->sta_mtx);
2383
6ff57cf8 2384 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
8d61ffa5 2385 return;
66e67e41
JB		 2386 out_err:
2387 mutex_unlock(&sdata->local->sta_mtx);
2388 /* ignore frame -- wait for timeout */
66e67e41
JB		 2389}
2390
dfa1ad29
CO		 2391#define case_WLAN(type) \
2392 case WLAN_REASON_##type: return #type
2393
2394static const char *ieee80211_get_reason_code_string(u16 reason_code)
2395{
2396 switch (reason_code) {
2397 case_WLAN(UNSPECIFIED);
2398 case_WLAN(PREV_AUTH_NOT_VALID);
2399 case_WLAN(DEAUTH_LEAVING);
2400 case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2401 case_WLAN(DISASSOC_AP_BUSY);
2402 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2403 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2404 case_WLAN(DISASSOC_STA_HAS_LEFT);
2405 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2406 case_WLAN(DISASSOC_BAD_POWER);
2407 case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2408 case_WLAN(INVALID_IE);
2409 case_WLAN(MIC_FAILURE);
2410 case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2411 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2412 case_WLAN(IE_DIFFERENT);
2413 case_WLAN(INVALID_GROUP_CIPHER);
2414 case_WLAN(INVALID_PAIRWISE_CIPHER);
2415 case_WLAN(INVALID_AKMP);
2416 case_WLAN(UNSUPP_RSN_VERSION);
2417 case_WLAN(INVALID_RSN_IE_CAP);
2418 case_WLAN(IEEE8021X_FAILED);
2419 case_WLAN(CIPHER_SUITE_REJECTED);
2420 case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2421 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2422 case_WLAN(DISASSOC_LOW_ACK);
2423 case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2424 case_WLAN(QSTA_LEAVE_QBSS);
2425 case_WLAN(QSTA_NOT_USE);
2426 case_WLAN(QSTA_REQUIRE_SETUP);
2427 case_WLAN(QSTA_TIMEOUT);
2428 case_WLAN(QSTA_CIPHER_NOT_SUPP);
2429 case_WLAN(MESH_PEER_CANCELED);
2430 case_WLAN(MESH_MAX_PEERS);
2431 case_WLAN(MESH_CONFIG);
2432 case_WLAN(MESH_CLOSE);
2433 case_WLAN(MESH_MAX_RETRIES);
2434 case_WLAN(MESH_CONFIRM_TIMEOUT);
2435 case_WLAN(MESH_INVALID_GTK);
2436 case_WLAN(MESH_INCONSISTENT_PARAM);
2437 case_WLAN(MESH_INVALID_SECURITY);
2438 case_WLAN(MESH_PATH_ERROR);
2439 case_WLAN(MESH_PATH_NOFORWARD);
2440 case_WLAN(MESH_PATH_DEST_UNREACHABLE);
2441 case_WLAN(MAC_EXISTS_IN_MBSS);
2442 case_WLAN(MESH_CHAN_REGULATORY);
2443 case_WLAN(MESH_CHAN);
2444 default: return "<unknown>";
2445 }
2446}
66e67e41 2447
8d61ffa5
JB		 2448static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2449 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2450{
46900298 2451 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 2452 const u8 *bssid = NULL;
f0706e82
JB		 2453 u16 reason_code;
2454
8d61ffa5 2455 sdata_assert_lock(sdata);
66e67e41 2456
f4ea83dd 2457 if (len < 24 + 2)
8d61ffa5 2458 return;
f0706e82 2459
66e67e41 2460 if (!ifmgd->associated ||
b203ca39 2461 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
8d61ffa5 2462 return;
77fdaa12 2463
0c1ad2ca 2464 bssid = ifmgd->associated->bssid;
f0706e82
JB		 2465
2466 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2467
dfa1ad29
CO		 2468 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
2469 bssid, reason_code, ieee80211_get_reason_code_string(reason_code));
77fdaa12 2470
37ad3888
JB		 2471 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2472
6ff57cf8 2473 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
f0706e82
JB		 2474}
2475
2476
8d61ffa5
JB		 2477static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2478 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2479{
46900298 2480 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 2481 u16 reason_code;
2482
8d61ffa5 2483 sdata_assert_lock(sdata);
77fdaa12 2484
66e67e41 2485 if (len < 24 + 2)
8d61ffa5 2486 return;
77fdaa12 2487
66e67e41 2488 if (!ifmgd->associated ||
b203ca39 2489 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
8d61ffa5 2490 return;
f0706e82
JB		 2491
2492 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2493
bdcbd8e0
JB		 2494 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2495 mgmt->sa, reason_code);
f0706e82 2496
37ad3888
JB		 2497 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2498
6ff57cf8 2499 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
f0706e82
JB		 2500}
2501
c74d084f
CL		 2502static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2503 u8 *supp_rates, unsigned int supp_rates_len,
2504 u32 *rates, u32 *basic_rates,
2505 bool *have_higher_than_11mbit,
2103dec1
SW		 2506 int *min_rate, int *min_rate_index,
2507 int shift, u32 rate_flags)
c74d084f
CL		 2508{
2509 int i, j;
2510
2511 for (i = 0; i < supp_rates_len; i++) {
2103dec1 2512 int rate = supp_rates[i] & 0x7f;
c74d084f
CL		 2513 bool is_basic = !!(supp_rates[i] & 0x80);
2514
2103dec1 2515 if ((rate * 5 * (1 << shift)) > 110)
c74d084f
CL		 2516 *have_higher_than_11mbit = true;
2517
2518 /*
2519 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2520 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2521 *
2522 * Note: Even through the membership selector and the basic
2523 * rate flag share the same bit, they are not exactly
2524 * the same.
2525 */
2526 if (!!(supp_rates[i] & 0x80) &&
2527 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2528 continue;
2529
2530 for (j = 0; j < sband->n_bitrates; j++) {
2103dec1
SW		 2531 struct ieee80211_rate *br;
2532 int brate;
2533
2534 br = &sband->bitrates[j];
2535 if ((rate_flags & br->flags) != rate_flags)
2536 continue;
2537
2538 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2539 if (brate == rate) {
c74d084f
CL		 2540 *rates |= BIT(j);
2541 if (is_basic)
2542 *basic_rates |= BIT(j);
2103dec1
SW		 2543 if ((rate * 5) < *min_rate) {
2544 *min_rate = rate * 5;
c74d084f
CL		 2545 *min_rate_index = j;
2546 }
2547 break;
2548 }
2549 }
2550 }
2551}
f0706e82 2552
66e67e41
JB		 2553static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2554 bool assoc)
2555{
2556 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2557
8d61ffa5 2558 sdata_assert_lock(sdata);
66e67e41 2559
66e67e41
JB		 2560 if (!assoc) {
2561 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2562
2563 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2564 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
028e8da0 2565 sdata->u.mgd.flags = 0;
34a3740d 2566 mutex_lock(&sdata->local->mtx);
55de908a 2567 ieee80211_vif_release_channel(sdata);
34a3740d 2568 mutex_unlock(&sdata->local->mtx);
66e67e41
JB		 2569 }
2570
2571 kfree(assoc_data);
2572 sdata->u.mgd.assoc_data = NULL;
2573}
2574
2575static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2576 struct cfg80211_bss *cbss,
af6b6374 2577 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2578{
46900298 2579 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 2580 struct ieee80211_local *local = sdata->local;
8318d78a 2581 struct ieee80211_supported_band *sband;
f0706e82 2582 struct sta_info *sta;
af6b6374 2583 u8 *pos;
af6b6374 2584 u16 capab_info, aid;
f0706e82 2585 struct ieee802_11_elems elems;
bda3933a 2586 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
35d865af
JB		 2587 const struct cfg80211_bss_ies *bss_ies = NULL;
2588 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
ae5eb026 2589 u32 changed = 0;
c74d084f 2590 int err;
35d865af 2591 bool ret;
f0706e82 2592
af6b6374 2593 /* AssocResp and ReassocResp have identical structure */
f0706e82 2594
f0706e82 2595 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 2596 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 2597
1dd84aa2 2598 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
bdcbd8e0
JB		 2599 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2600 aid);
1dd84aa2
JB		 2601 aid &= ~(BIT(15) | BIT(14));
2602
05cb9108
JB		 2603 ifmgd->broken_ap = false;
2604
2605 if (aid == 0 || aid > IEEE80211_MAX_AID) {
bdcbd8e0
JB		 2606 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2607 aid);
05cb9108
JB		 2608 aid = 0;
2609 ifmgd->broken_ap = true;
2610 }
2611
af6b6374 2612 pos = mgmt->u.assoc_resp.variable;
b2e506bf 2613 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
af6b6374 2614
f0706e82 2615 if (!elems.supp_rates) {
bdcbd8e0 2616 sdata_info(sdata, "no SuppRates element in AssocResp\n");
af6b6374 2617 return false;
f0706e82
JB		 2618 }
2619
46900298 2620 ifmgd->aid = aid;
f0706e82 2621
35d865af
JB		 2622 /*
2623 * Some APs are erroneously not including some information in their
2624 * (re)association response frames. Try to recover by using the data
2625 * from the beacon or probe response. This seems to afflict mobile
2626 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2627 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2628 */
2629 if ((assoc_data->wmm && !elems.wmm_param) ||
2630 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2631 (!elems.ht_cap_elem || !elems.ht_operation)) ||
2632 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2633 (!elems.vht_cap_elem || !elems.vht_operation))) {
2634 const struct cfg80211_bss_ies *ies;
2635 struct ieee802_11_elems bss_elems;
2636
2637 rcu_read_lock();
2638 ies = rcu_dereference(cbss->ies);
2639 if (ies)
2640 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2641 GFP_ATOMIC);
2642 rcu_read_unlock();
2643 if (!bss_ies)
2644 return false;
2645
2646 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2647 false, &bss_elems);
2648 if (assoc_data->wmm &&
2649 !elems.wmm_param && bss_elems.wmm_param) {
2650 elems.wmm_param = bss_elems.wmm_param;
2651 sdata_info(sdata,
2652 "AP bug: WMM param missing from AssocResp\n");
2653 }
2654
2655 /*
2656 * Also check if we requested HT/VHT, otherwise the AP doesn't
2657 * have to include the IEs in the (re)association response.
2658 */
2659 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2660 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2661 elems.ht_cap_elem = bss_elems.ht_cap_elem;
2662 sdata_info(sdata,
2663 "AP bug: HT capability missing from AssocResp\n");
2664 }
2665 if (!elems.ht_operation && bss_elems.ht_operation &&
2666 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2667 elems.ht_operation = bss_elems.ht_operation;
2668 sdata_info(sdata,
2669 "AP bug: HT operation missing from AssocResp\n");
2670 }
2671 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2672 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2673 elems.vht_cap_elem = bss_elems.vht_cap_elem;
2674 sdata_info(sdata,
2675 "AP bug: VHT capa missing from AssocResp\n");
2676 }
2677 if (!elems.vht_operation && bss_elems.vht_operation &&
2678 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2679 elems.vht_operation = bss_elems.vht_operation;
2680 sdata_info(sdata,
2681 "AP bug: VHT operation missing from AssocResp\n");
2682 }
2683 }
2684
30eb1dc2
JB		 2685 /*
2686 * We previously checked these in the beacon/probe response, so
2687 * they should be present here. This is just a safety net.
2688 */
2689 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2690 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2691 sdata_info(sdata,
35d865af
JB		 2692 "HT AP is missing WMM params or HT capability/operation\n");
2693 ret = false;
2694 goto out;
30eb1dc2
JB		 2695 }
2696
2697 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2698 (!elems.vht_cap_elem || !elems.vht_operation)) {
2699 sdata_info(sdata,
35d865af
JB		 2700 "VHT AP is missing VHT capability/operation\n");
2701 ret = false;
2702 goto out;
30eb1dc2
JB		 2703 }
2704
2a33bee2
GE		 2705 mutex_lock(&sdata->local->sta_mtx);
2706 /*
2707 * station info was already allocated and inserted before
2708 * the association and should be available to us
2709 */
7852e361 2710 sta = sta_info_get(sdata, cbss->bssid);
2a33bee2
GE		 2711 if (WARN_ON(!sta)) {
2712 mutex_unlock(&sdata->local->sta_mtx);
35d865af
JB		 2713 ret = false;
2714 goto out;
77fdaa12 2715 }
05e5e883 2716
55de908a 2717 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
f709fc69 2718
30eb1dc2 2719 /* Set up internal HT/VHT capabilities */
a8243b72 2720 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
ef96a842 2721 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
e1a0c6b3 2722 elems.ht_cap_elem, sta);
64f68e5d 2723
818255ea
MP		 2724 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2725 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
4a34215e 2726 elems.vht_cap_elem, sta);
818255ea 2727
30eb1dc2
JB		 2728 /*
2729 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
2730 * in their association response, so ignore that data for our own
2731 * configuration. If it changed since the last beacon, we'll get the
2732 * next beacon and update then.
2733 */
1128958d 2734
bee7f586
JB		 2735 /*
2736 * If an operating mode notification IE is present, override the
2737 * NSS calculation (that would be done in rate_control_rate_init())
2738 * and use the # of streams from that element.
2739 */
2740 if (elems.opmode_notif &&
2741 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
2742 u8 nss;
2743
2744 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
2745 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
2746 nss += 1;
2747 sta->sta.rx_nss = nss;
2748 }
2749
4b7679a5 2750 rate_control_rate_init(sta);
f0706e82 2751
46900298 2752 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
c2c98fde 2753 set_sta_flag(sta, WLAN_STA_MFP);
5394af4d 2754
a74a8c84 2755 sta->sta.wme = elems.wmm_param;
ddf4ac53 2756
3e4d40fa 2757 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
c8987876
JB		 2758 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2759 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2760 if (err) {
bdcbd8e0
JB		 2761 sdata_info(sdata,
2762 "failed to move station %pM to desired state\n",
2763 sta->sta.addr);
c8987876
JB		 2764 WARN_ON(__sta_info_destroy(sta));
2765 mutex_unlock(&sdata->local->sta_mtx);
35d865af
JB		 2766 ret = false;
2767 goto out;
c8987876
JB		 2768 }
2769
7852e361 2770 mutex_unlock(&sdata->local->sta_mtx);
ddf4ac53 2771
f2176d72
JO		 2772 /*
2773 * Always handle WMM once after association regardless
2774 * of the first value the AP uses. Setting -1 here has
2775 * that effect because the AP values is an unsigned
2776 * 4-bit value.
2777 */
2778 ifmgd->wmm_last_param_set = -1;
2779
095d81ce 2780 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && elems.wmm_param)
4ced3f74 2781 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 2782 elems.wmm_param_len);
aa837e1d 2783 else
3abead59
JB		 2784 ieee80211_set_wmm_default(sdata, false);
2785 changed |= BSS_CHANGED_QOS;
f0706e82 2786
60f8b39c
JB		 2787 /* set AID and assoc capability,
2788 * ieee80211_set_associated() will tell the driver */
2789 bss_conf->aid = aid;
2790 bss_conf->assoc_capability = capab_info;
0c1ad2ca 2791 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 2792
d524215f
FF		 2793 /*
2794 * If we're using 4-addr mode, let the AP know that we're
2795 * doing so, so that it can create the STA VLAN on its side
2796 */
2797 if (ifmgd->use_4addr)
2798 ieee80211_send_4addr_nullfunc(local, sdata);
2799
15b7b062 2800 /*
b291ba11
JB		 2801 * Start timer to probe the connection to the AP now.
2802 * Also start the timer that will detect beacon loss.
15b7b062 2803 */
b291ba11 2804 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 2805 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 2806
35d865af
JB		 2807 ret = true;
2808 out:
2809 kfree(bss_ies);
2810 return ret;
f0706e82
JB		 2811}
2812
8d61ffa5
JB		 2813static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2814 struct ieee80211_mgmt *mgmt,
2815 size_t len)
66e67e41
JB		 2816{
2817 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2818 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2819 u16 capab_info, status_code, aid;
2820 struct ieee802_11_elems elems;
b0b6aa2c 2821 int ac, uapsd_queues = -1;
66e67e41
JB		 2822 u8 *pos;
2823 bool reassoc;
8d61ffa5 2824 struct cfg80211_bss *bss;
66e67e41 2825
8d61ffa5 2826 sdata_assert_lock(sdata);
66e67e41
JB		 2827
2828 if (!assoc_data)
8d61ffa5 2829 return;
b203ca39 2830 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
8d61ffa5 2831 return;
66e67e41
JB		 2832
2833 /*
2834 * AssocResp and ReassocResp have identical structure, so process both
2835 * of them in this function.
2836 */
2837
2838 if (len < 24 + 6)
8d61ffa5 2839 return;
66e67e41
JB		 2840
2841 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2842 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2843 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2844 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2845
bdcbd8e0
JB		 2846 sdata_info(sdata,
2847 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2848 reassoc ? "Rea" : "A", mgmt->sa,
2849 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
66e67e41
JB		 2850
2851 pos = mgmt->u.assoc_resp.variable;
b2e506bf 2852 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
66e67e41
JB		 2853
2854 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
79ba1d89
JB		 2855 elems.timeout_int &&
2856 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
66e67e41 2857 u32 tu, ms;
79ba1d89 2858 tu = le32_to_cpu(elems.timeout_int->value);
66e67e41 2859 ms = tu * 1024 / 1000;
bdcbd8e0
JB		 2860 sdata_info(sdata,
2861 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2862 mgmt->sa, tu, ms);
66e67e41 2863 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
89afe614 2864 assoc_data->timeout_started = true;
66e67e41 2865 if (ms > IEEE80211_ASSOC_TIMEOUT)
8d61ffa5
JB		 2866 run_again(sdata, assoc_data->timeout);
2867 return;
66e67e41
JB		 2868 }
2869
8d61ffa5 2870 bss = assoc_data->bss;
66e67e41
JB		 2871
2872 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2873 sdata_info(sdata, "%pM denied association (code=%d)\n",
2874 mgmt->sa, status_code);
66e67e41
JB		 2875 ieee80211_destroy_assoc_data(sdata, false);
2876 } else {
8d61ffa5 2877 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
66e67e41 2878 /* oops -- internal error -- send timeout for now */
10a9109f 2879 ieee80211_destroy_assoc_data(sdata, false);
959867fa 2880 cfg80211_assoc_timeout(sdata->dev, bss);
8d61ffa5 2881 return;
66e67e41 2882 }
635d999f 2883 sdata_info(sdata, "associated\n");
79ebfb85
JB		 2884
2885 /*
2886 * destroy assoc_data afterwards, as otherwise an idle
2887 * recalc after assoc_data is NULL but before associated
2888 * is set can cause the interface to go idle
2889 */
2890 ieee80211_destroy_assoc_data(sdata, true);
b0b6aa2c
EP		 2891
2892 /* get uapsd queues configuration */
2893 uapsd_queues = 0;
2894 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
2895 if (sdata->tx_conf[ac].uapsd)
2896 uapsd_queues |= BIT(ac);
66e67e41
JB		 2897 }
2898
b0b6aa2c 2899 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues);
66e67e41 2900}
8e3c1b77 2901
98c8fccf 2902static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
8e3c1b77 2903 struct ieee80211_mgmt *mgmt, size_t len,
98c8fccf 2904 struct ieee80211_rx_status *rx_status,
d45c4172 2905 struct ieee802_11_elems *elems)
98c8fccf
JB		 2906{
2907 struct ieee80211_local *local = sdata->local;
c2b13452 2908 struct ieee80211_bss *bss;
98c8fccf 2909 struct ieee80211_channel *channel;
56007a02 2910
8d61ffa5 2911 sdata_assert_lock(sdata);
b4f286a1 2912
3afc2167
EG		 2913 channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
2914 if (!channel)
98c8fccf
JB		 2915 return;
2916
98c8fccf 2917 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
d45c4172 2918 channel);
817cee76 2919 if (bss) {
817cee76 2920 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
d2722f8b 2921 ieee80211_rx_bss_put(local, bss);
817cee76 2922 }
f0706e82
JB		 2923}
2924
2925
f698d856 2926static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 2927 struct sk_buff *skb)
f0706e82 2928{
af6b6374 2929 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 2930 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 2931 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2932 size_t baselen, len = skb->len;
ae6a44e3
EK		 2933 struct ieee802_11_elems elems;
2934
15b7b062
KV		 2935 ifmgd = &sdata->u.mgd;
2936
8d61ffa5 2937 sdata_assert_lock(sdata);
77fdaa12 2938
b203ca39 2939 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
8e7cdbb6
TW		 2940 return; /* ignore ProbeResp to foreign address */
2941
ae6a44e3
EK		 2942 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2943 if (baselen > len)
2944 return;
2945
2946 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
b2e506bf 2947 false, &elems);
ae6a44e3 2948
d45c4172 2949 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
9859b81e 2950
77fdaa12 2951 if (ifmgd->associated &&
b203ca39 2952 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
4e5ff376 2953 ieee80211_reset_ap_probe(sdata);
66e67e41
JB		 2954
2955 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
b203ca39 2956 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
66e67e41 2957 /* got probe response, continue with auth */
bdcbd8e0 2958 sdata_info(sdata, "direct probe responded\n");
66e67e41
JB		 2959 ifmgd->auth_data->tries = 0;
2960 ifmgd->auth_data->timeout = jiffies;
89afe614 2961 ifmgd->auth_data->timeout_started = true;
8d61ffa5 2962 run_again(sdata, ifmgd->auth_data->timeout);
66e67e41 2963 }
f0706e82
JB		 2964}
2965
d91f36db
JB		 2966/*
2967 * This is the canonical list of information elements we care about,
2968 * the filter code also gives us all changes to the Microsoft OUI
c8d65917
SG		 2969 * (00:50:F2) vendor IE which is used for WMM which we need to track,
2970 * as well as the DTPC IE (part of the Cisco OUI) used for signaling
2971 * changes to requested client power.
d91f36db
JB		 2972 *
2973 * We implement beacon filtering in software since that means we can
2974 * avoid processing the frame here and in cfg80211, and userspace
2975 * will not be able to tell whether the hardware supports it or not.
2976 *
2977 * XXX: This list needs to be dynamic -- userspace needs to be able to
2978 * add items it requires. It also needs to be able to tell us to
2979 * look out for other vendor IEs.
2980 */
2981static const u64 care_about_ies =
1d4df3a5
JB		 2982 (1ULL << WLAN_EID_COUNTRY) |
2983 (1ULL << WLAN_EID_ERP_INFO) |
2984 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2985 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2986 (1ULL << WLAN_EID_HT_CAPABILITY) |
074d46d1 2987 (1ULL << WLAN_EID_HT_OPERATION);
d91f36db 2988
8d61ffa5
JB		 2989static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
2990 struct ieee80211_mgmt *mgmt, size_t len,
2991 struct ieee80211_rx_status *rx_status)
f0706e82 2992{
d91f36db 2993 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 2994 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 2995 size_t baselen;
2996 struct ieee802_11_elems elems;
f698d856 2997 struct ieee80211_local *local = sdata->local;
55de908a
JB		 2998 struct ieee80211_chanctx_conf *chanctx_conf;
2999 struct ieee80211_channel *chan;
bee7f586 3000 struct sta_info *sta;
471b3efd 3001 u32 changed = 0;
f87ad637 3002 bool erp_valid;
7a5158ef 3003 u8 erp_value = 0;
d91f36db 3004 u32 ncrc;
77fdaa12 3005 u8 *bssid;
8d61ffa5 3006 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
77fdaa12 3007
8d61ffa5 3008 sdata_assert_lock(sdata);
f0706e82 3009
ae6a44e3
EK		 3010 /* Process beacon from the current BSS */
3011 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3012 if (baselen > len)
8d61ffa5 3013 return;
ae6a44e3 3014
55de908a
JB		 3015 rcu_read_lock();
3016 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3017 if (!chanctx_conf) {
3018 rcu_read_unlock();
8d61ffa5 3019 return;
55de908a
JB		 3020 }
3021
4bf88530 3022 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
55de908a 3023 rcu_read_unlock();
8d61ffa5 3024 return;
55de908a 3025 }
4bf88530 3026 chan = chanctx_conf->def.chan;
55de908a 3027 rcu_read_unlock();
f0706e82 3028
c65dd147 3029 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
b203ca39 3030 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
66e67e41 3031 ieee802_11_parse_elems(mgmt->u.beacon.variable,
b2e506bf 3032 len - baselen, false, &elems);
77fdaa12 3033
d45c4172 3034 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
482a9c74
AB		 3035 if (elems.tim && !elems.parse_error) {
3036 const struct ieee80211_tim_ie *tim_ie = elems.tim;
3037 ifmgd->dtim_period = tim_ie->dtim_period;
3038 }
989c6505 3039 ifmgd->have_beacon = true;
c65dd147 3040 ifmgd->assoc_data->need_beacon = false;
ef429dad
JB		 3041 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3042 sdata->vif.bss_conf.sync_tsf =
3043 le64_to_cpu(mgmt->u.beacon.timestamp);
3044 sdata->vif.bss_conf.sync_device_ts =
3045 rx_status->device_timestamp;
3046 if (elems.tim)
3047 sdata->vif.bss_conf.sync_dtim_count =
3048 elems.tim->dtim_count;
3049 else
3050 sdata->vif.bss_conf.sync_dtim_count = 0;
3051 }
66e67e41
JB		 3052 /* continue assoc process */
3053 ifmgd->assoc_data->timeout = jiffies;
89afe614 3054 ifmgd->assoc_data->timeout_started = true;
8d61ffa5
JB		 3055 run_again(sdata, ifmgd->assoc_data->timeout);
3056 return;
66e67e41 3057 }
77fdaa12 3058
66e67e41 3059 if (!ifmgd->associated ||
b203ca39 3060 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
8d61ffa5 3061 return;
66e67e41 3062 bssid = ifmgd->associated->bssid;
f0706e82 3063
17e4ec14
JM		 3064 /* Track average RSSI from the Beacon frames of the current AP */
3065 ifmgd->last_beacon_signal = rx_status->signal;
3066 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3067 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3ba06c6f 3068 ifmgd->ave_beacon_signal = rx_status->signal * 16;
17e4ec14 3069 ifmgd->last_cqm_event_signal = 0;
391a200a 3070 ifmgd->count_beacon_signal = 1;
615f7b9b 3071 ifmgd->last_ave_beacon_signal = 0;
17e4ec14
JM		 3072 } else {
3073 ifmgd->ave_beacon_signal =
3074 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
3075 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
3076 ifmgd->ave_beacon_signal) / 16;
391a200a 3077 ifmgd->count_beacon_signal++;
17e4ec14 3078 }
615f7b9b
MV		 3079
3080 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3081 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3082 int sig = ifmgd->ave_beacon_signal;
3083 int last_sig = ifmgd->last_ave_beacon_signal;
3084
3085 /*
3086 * if signal crosses either of the boundaries, invoke callback
3087 * with appropriate parameters
3088 */
3089 if (sig > ifmgd->rssi_max_thold &&
3090 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3091 ifmgd->last_ave_beacon_signal = sig;
887da917 3092 drv_rssi_callback(local, sdata, RSSI_EVENT_HIGH);
615f7b9b
MV		 3093 } else if (sig < ifmgd->rssi_min_thold &&
3094 (last_sig >= ifmgd->rssi_max_thold ||
3095 last_sig == 0)) {
3096 ifmgd->last_ave_beacon_signal = sig;
887da917 3097 drv_rssi_callback(local, sdata, RSSI_EVENT_LOW);
615f7b9b
MV		 3098 }
3099 }
3100
17e4ec14 3101 if (bss_conf->cqm_rssi_thold &&
391a200a 3102 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
ea086359 3103 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
17e4ec14
JM		 3104 int sig = ifmgd->ave_beacon_signal / 16;
3105 int last_event = ifmgd->last_cqm_event_signal;
3106 int thold = bss_conf->cqm_rssi_thold;
3107 int hyst = bss_conf->cqm_rssi_hyst;
3108 if (sig < thold &&
3109 (last_event == 0 || sig < last_event - hyst)) {
3110 ifmgd->last_cqm_event_signal = sig;
3111 ieee80211_cqm_rssi_notify(
3112 &sdata->vif,
3113 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3114 GFP_KERNEL);
3115 } else if (sig > thold &&
3116 (last_event == 0 || sig > last_event + hyst)) {
3117 ifmgd->last_cqm_event_signal = sig;
3118 ieee80211_cqm_rssi_notify(
3119 &sdata->vif,
3120 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3121 GFP_KERNEL);
3122 }
3123 }
3124
392b9ffb 3125 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
bdcbd8e0 3126 mlme_dbg_ratelimited(sdata,
112c31f0 3127 "cancelling AP probe due to a received beacon\n");
392b9ffb 3128 ieee80211_reset_ap_probe(sdata);
92778180
JM		 3129 }
3130
b291ba11
JB		 3131 /*
3132 * Push the beacon loss detection into the future since
3133 * we are processing a beacon from the AP just now.
3134 */
d3a910a8 3135 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 3136
d91f36db
JB		 3137 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3138 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
b2e506bf 3139 len - baselen, false, &elems,
d91f36db
JB		 3140 care_about_ies, ncrc);
3141
25c9c875 3142 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
f87ad637
RR		 3143 bool directed_tim = ieee80211_check_tim(elems.tim,
3144 elems.tim_len,
3145 ifmgd->aid);
1fb3606b 3146 if (directed_tim) {
572e0012 3147 if (local->hw.conf.dynamic_ps_timeout > 0) {
70b12f26
RW		 3148 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3149 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3150 ieee80211_hw_config(local,
3151 IEEE80211_CONF_CHANGE_PS);
3152 }
572e0012 3153 ieee80211_send_nullfunc(local, sdata, 0);
6f0756a3 3154 } else if (!local->pspolling && sdata->u.mgd.powersave) {
572e0012
KV		 3155 local->pspolling = true;
3156
3157 /*
3158 * Here is assumed that the driver will be
3159 * able to send ps-poll frame and receive a
3160 * response even though power save mode is
3161 * enabled, but some drivers might require
3162 * to disable power save here. This needs
3163 * to be investigated.
3164 */
3165 ieee80211_send_pspoll(local, sdata);
3166 }
a97b77b9
VN		 3167 }
3168 }
7a5158ef 3169
488dd7b5 3170 if (sdata->vif.p2p) {
67baf663 3171 struct ieee80211_p2p_noa_attr noa = {};
488dd7b5
JB		 3172 int ret;
3173
3174 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3175 len - baselen,
3176 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
934457ee 3177 (u8 *) &noa, sizeof(noa));
67baf663
JD		 3178 if (ret >= 2) {
3179 if (sdata->u.mgd.p2p_noa_index != noa.index) {
3180 /* valid noa_attr and index changed */
3181 sdata->u.mgd.p2p_noa_index = noa.index;
3182 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3183 changed |= BSS_CHANGED_P2P_PS;
3184 /*
3185 * make sure we update all information, the CRC
3186 * mechanism doesn't look at P2P attributes.
3187 */
3188 ifmgd->beacon_crc_valid = false;
3189 }
3190 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3191 /* noa_attr not found and we had valid noa_attr before */
3192 sdata->u.mgd.p2p_noa_index = -1;
3193 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
488dd7b5 3194 changed |= BSS_CHANGED_P2P_PS;
488dd7b5
JB		 3195 ifmgd->beacon_crc_valid = false;
3196 }
3197 }
3198
d8ec4433 3199 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
8d61ffa5 3200 return;
30196673 3201 ifmgd->beacon_crc = ncrc;
d8ec4433 3202 ifmgd->beacon_crc_valid = true;
30196673 3203
d45c4172 3204 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
7d25745d 3205
d70b7616
JB		 3206 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
3207 &elems, true);
3208
095d81ce
JB		 3209 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3210 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
7d25745d
JB		 3211 elems.wmm_param_len))
3212 changed |= BSS_CHANGED_QOS;
3213
c65dd147
EG		 3214 /*
3215 * If we haven't had a beacon before, tell the driver about the
ef429dad 3216 * DTIM period (and beacon timing if desired) now.
c65dd147 3217 */
989c6505 3218 if (!ifmgd->have_beacon) {
c65dd147
EG		 3219 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3220 if (elems.tim)
3221 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3222 else
3223 bss_conf->dtim_period = 1;
ef429dad
JB		 3224
3225 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3226 sdata->vif.bss_conf.sync_tsf =
3227 le64_to_cpu(mgmt->u.beacon.timestamp);
3228 sdata->vif.bss_conf.sync_device_ts =
3229 rx_status->device_timestamp;
3230 if (elems.tim)
3231 sdata->vif.bss_conf.sync_dtim_count =
3232 elems.tim->dtim_count;
3233 else
3234 sdata->vif.bss_conf.sync_dtim_count = 0;
3235 }
3236
989c6505
AB		 3237 changed |= BSS_CHANGED_BEACON_INFO;
3238 ifmgd->have_beacon = true;
482a9c74
AB		 3239
3240 mutex_lock(&local->iflist_mtx);
3241 ieee80211_recalc_ps(local, -1);
3242 mutex_unlock(&local->iflist_mtx);
3243
ce857888 3244 ieee80211_recalc_ps_vif(sdata);
c65dd147
EG		 3245 }
3246
1946bed9 3247 if (elems.erp_info) {
7a5158ef
JB		 3248 erp_valid = true;
3249 erp_value = elems.erp_info[0];
3250 } else {
3251 erp_valid = false;
50c4afb9 3252 }
7a5158ef
JB		 3253 changed |= ieee80211_handle_bss_capability(sdata,
3254 le16_to_cpu(mgmt->u.beacon.capab_info),
3255 erp_valid, erp_value);
f0706e82 3256
1128958d 3257 mutex_lock(&local->sta_mtx);
bee7f586
JB		 3258 sta = sta_info_get(sdata, bssid);
3259
53b954ee
EP		 3260 if (ieee80211_config_bw(sdata, sta,
3261 elems.ht_cap_elem, elems.ht_operation,
30eb1dc2
JB		 3262 elems.vht_operation, bssid, &changed)) {
3263 mutex_unlock(&local->sta_mtx);
3264 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3265 WLAN_REASON_DEAUTH_LEAVING,
3266 true, deauth_buf);
6ff57cf8
JB		 3267 cfg80211_tx_mlme_mgmt(sdata->dev, deauth_buf,
3268 sizeof(deauth_buf));
8d61ffa5 3269 return;
30eb1dc2 3270 }
bee7f586
JB		 3271
3272 if (sta && elems.opmode_notif)
3273 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3274 rx_status->band, true);
1128958d 3275 mutex_unlock(&local->sta_mtx);
d3c990fb 3276
24a4e400
SG		 3277 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
3278 elems.country_elem,
3279 elems.country_elem_len,
c8d65917
SG		 3280 elems.pwr_constr_elem,
3281 elems.cisco_dtpc_elem);
3f2355cb 3282
471b3efd 3283 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 3284}
3285
1fa57d01
JB		 3286void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3287 struct sk_buff *skb)
f0706e82
JB		 3288{
3289 struct ieee80211_rx_status *rx_status;
f0706e82
JB		 3290 struct ieee80211_mgmt *mgmt;
3291 u16 fc;
1b3a2e49
JB		 3292 struct ieee802_11_elems elems;
3293 int ies_len;
f0706e82 3294
f0706e82
JB		 3295 rx_status = (struct ieee80211_rx_status *) skb->cb;
3296 mgmt = (struct ieee80211_mgmt *) skb->data;
3297 fc = le16_to_cpu(mgmt->frame_control);
3298
8d61ffa5 3299 sdata_lock(sdata);
77fdaa12 3300
66e67e41
JB		 3301 switch (fc & IEEE80211_FCTL_STYPE) {
3302 case IEEE80211_STYPE_BEACON:
8d61ffa5 3303 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
66e67e41
JB		 3304 break;
3305 case IEEE80211_STYPE_PROBE_RESP:
3306 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3307 break;
3308 case IEEE80211_STYPE_AUTH:
8d61ffa5 3309 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
66e67e41
JB		 3310 break;
3311 case IEEE80211_STYPE_DEAUTH:
8d61ffa5 3312 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
66e67e41
JB		 3313 break;
3314 case IEEE80211_STYPE_DISASSOC:
8d61ffa5 3315 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
66e67e41
JB		 3316 break;
3317 case IEEE80211_STYPE_ASSOC_RESP:
3318 case IEEE80211_STYPE_REASSOC_RESP:
8d61ffa5 3319 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
66e67e41
JB		 3320 break;
3321 case IEEE80211_STYPE_ACTION:
37799e52 3322 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
1b3a2e49
JB		 3323 ies_len = skb->len -
3324 offsetof(struct ieee80211_mgmt,
3325 u.action.u.chan_switch.variable);
37799e52
JB		 3326
3327 if (ies_len < 0)
3328 break;
3329
3330 ieee802_11_parse_elems(
3331 mgmt->u.action.u.chan_switch.variable,
b2e506bf 3332 ies_len, true, &elems);
37799e52
JB		 3333
3334 if (elems.parse_error)
3335 break;
3336
1b3a2e49
JB		 3337 ieee80211_sta_process_chanswitch(sdata,
3338 rx_status->mactime,
04a161f4 3339 &elems, false);
1b3a2e49
JB		 3340 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3341 ies_len = skb->len -
3342 offsetof(struct ieee80211_mgmt,
3343 u.action.u.ext_chan_switch.variable);
3344
3345 if (ies_len < 0)
3346 break;
3347
3348 ieee802_11_parse_elems(
3349 mgmt->u.action.u.ext_chan_switch.variable,
b2e506bf 3350 ies_len, true, &elems);
1b3a2e49
JB		 3351
3352 if (elems.parse_error)
3353 break;
3354
3355 /* for the handling code pretend this was also an IE */
3356 elems.ext_chansw_ie =
3357 &mgmt->u.action.u.ext_chan_switch.data;
3358
66e67e41 3359 ieee80211_sta_process_chanswitch(sdata,
37799e52 3360 rx_status->mactime,
04a161f4 3361 &elems, false);
77fdaa12 3362 }
37799e52 3363 break;
77fdaa12 3364 }
8d61ffa5 3365 sdata_unlock(sdata);
f0706e82
JB		 3366}
3367
9c6bd790 3368static void ieee80211_sta_timer(unsigned long data)
f0706e82 3369{
60f8b39c
JB		 3370 struct ieee80211_sub_if_data *sdata =
3371 (struct ieee80211_sub_if_data *) data;
5bb644a0 3372
9b7d72c1 3373 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
f0706e82
JB		 3374}
3375
04ac3c0e 3376static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
6b684db1 3377 u8 *bssid, u8 reason, bool tx)
04ac3c0e 3378{
6ae16775 3379 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
04ac3c0e 3380
37ad3888 3381 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
6b684db1 3382 tx, frame_buf);
37ad3888 3383
6ff57cf8
JB		 3384 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3385 IEEE80211_DEAUTH_FRAME_LEN);
04ac3c0e
FF		 3386}
3387
66e67e41
JB		 3388static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
3389{
3390 struct ieee80211_local *local = sdata->local;
3391 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3392 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
1672c0e3 3393 u32 tx_flags = 0;
66e67e41 3394
8d61ffa5 3395 sdata_assert_lock(sdata);
66e67e41
JB		 3396
3397 if (WARN_ON_ONCE(!auth_data))
3398 return -EINVAL;
3399
66e67e41
JB		 3400 auth_data->tries++;
3401
3402 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
bdcbd8e0
JB		 3403 sdata_info(sdata, "authentication with %pM timed out\n",
3404 auth_data->bss->bssid);
66e67e41
JB		 3405
3406 /*
3407 * Most likely AP is not in the range so remove the
3408 * bss struct for that AP.
3409 */
3410 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3411
3412 return -ETIMEDOUT;
3413 }
3414
a1845fc7
JB		 3415 drv_mgd_prepare_tx(local, sdata);
3416
66e67e41 3417 if (auth_data->bss->proberesp_ies) {
6b8ece3a
JM		 3418 u16 trans = 1;
3419 u16 status = 0;
3420
bdcbd8e0
JB		 3421 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3422 auth_data->bss->bssid, auth_data->tries,
3423 IEEE80211_AUTH_MAX_TRIES);
66e67e41
JB		 3424
3425 auth_data->expected_transaction = 2;
6b8ece3a
JM		 3426
3427 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3428 trans = auth_data->sae_trans;
3429 status = auth_data->sae_status;
3430 auth_data->expected_transaction = trans;
3431 }
3432
6211dd12
SG		 3433 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3434 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3435 IEEE80211_TX_INTFL_MLME_CONN_TX;
3436
6b8ece3a
JM		 3437 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3438 auth_data->data, auth_data->data_len,
66e67e41 3439 auth_data->bss->bssid,
1672c0e3
JB		 3440 auth_data->bss->bssid, NULL, 0, 0,
3441 tx_flags);
66e67e41
JB		 3442 } else {
3443 const u8 *ssidie;
3444
bdcbd8e0
JB		 3445 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
3446 auth_data->bss->bssid, auth_data->tries,
3447 IEEE80211_AUTH_MAX_TRIES);
66e67e41 3448
9caf0364 3449 rcu_read_lock();
66e67e41 3450 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
9caf0364
JB		 3451 if (!ssidie) {
3452 rcu_read_unlock();
66e67e41 3453 return -EINVAL;
9caf0364 3454 }
66e67e41
JB		 3455 /*
3456 * Direct probe is sent to broadcast address as some APs
3457 * will not answer to direct packet in unassociated state.
3458 */
3459 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
6211dd12 3460 NULL, 0, (u32) -1, true, 0,
55de908a 3461 auth_data->bss->channel, false);
9caf0364 3462 rcu_read_unlock();
66e67e41
JB		 3463 }
3464
6211dd12 3465 if (tx_flags == 0) {
1672c0e3 3466 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
cb236d2d 3467 auth_data->timeout_started = true;
8d61ffa5 3468 run_again(sdata, auth_data->timeout);
89afe614 3469 } else {
cb236d2d
JB		 3470 auth_data->timeout =
3471 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3472 auth_data->timeout_started = true;
3473 run_again(sdata, auth_data->timeout);
1672c0e3 3474 }
66e67e41
JB		 3475
3476 return 0;
3477}
3478
3479static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3480{
3481 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3482 struct ieee80211_local *local = sdata->local;
3483
8d61ffa5 3484 sdata_assert_lock(sdata);
66e67e41 3485
66e67e41
JB		 3486 assoc_data->tries++;
3487 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
bdcbd8e0
JB		 3488 sdata_info(sdata, "association with %pM timed out\n",
3489 assoc_data->bss->bssid);
66e67e41
JB		 3490
3491 /*
3492 * Most likely AP is not in the range so remove the
3493 * bss struct for that AP.
3494 */
3495 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3496
3497 return -ETIMEDOUT;
3498 }
3499
bdcbd8e0
JB		 3500 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3501 assoc_data->bss->bssid, assoc_data->tries,
3502 IEEE80211_ASSOC_MAX_TRIES);
66e67e41
JB		 3503 ieee80211_send_assoc(sdata);
3504
1672c0e3
JB		 3505 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
3506 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
89afe614 3507 assoc_data->timeout_started = true;
8d61ffa5 3508 run_again(sdata, assoc_data->timeout);
89afe614 3509 } else {
cb236d2d
JB		 3510 assoc_data->timeout =
3511 round_jiffies_up(jiffies +
3512 IEEE80211_ASSOC_TIMEOUT_LONG);
3513 assoc_data->timeout_started = true;
3514 run_again(sdata, assoc_data->timeout);
1672c0e3 3515 }
66e67e41
JB		 3516
3517 return 0;
3518}
3519
1672c0e3
JB		 3520void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3521 __le16 fc, bool acked)
3522{
3523 struct ieee80211_local *local = sdata->local;
3524
3525 sdata->u.mgd.status_fc = fc;
3526 sdata->u.mgd.status_acked = acked;
3527 sdata->u.mgd.status_received = true;
3528
3529 ieee80211_queue_work(&local->hw, &sdata->work);
3530}
3531
1fa57d01 3532void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 3533{
9c6bd790 3534 struct ieee80211_local *local = sdata->local;
1fa57d01 3535 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 3536
8d61ffa5 3537 sdata_lock(sdata);
77fdaa12 3538
1672c0e3
JB		 3539 if (ifmgd->status_received) {
3540 __le16 fc = ifmgd->status_fc;
3541 bool status_acked = ifmgd->status_acked;
3542
3543 ifmgd->status_received = false;
3544 if (ifmgd->auth_data &&
3545 (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) {
3546 if (status_acked) {
3547 ifmgd->auth_data->timeout =
3548 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
8d61ffa5 3549 run_again(sdata, ifmgd->auth_data->timeout);
1672c0e3
JB		 3550 } else {
3551 ifmgd->auth_data->timeout = jiffies - 1;
3552 }
89afe614 3553 ifmgd->auth_data->timeout_started = true;
1672c0e3
JB		 3554 } else if (ifmgd->assoc_data &&
3555 (ieee80211_is_assoc_req(fc) ||
3556 ieee80211_is_reassoc_req(fc))) {
3557 if (status_acked) {
3558 ifmgd->assoc_data->timeout =
3559 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
8d61ffa5 3560 run_again(sdata, ifmgd->assoc_data->timeout);
1672c0e3
JB		 3561 } else {
3562 ifmgd->assoc_data->timeout = jiffies - 1;
3563 }
89afe614 3564 ifmgd->assoc_data->timeout_started = true;
1672c0e3
JB		 3565 }
3566 }
3567
89afe614 3568 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
66e67e41
JB		 3569 time_after(jiffies, ifmgd->auth_data->timeout)) {
3570 if (ifmgd->auth_data->done) {
3571 /*
3572 * ok ... we waited for assoc but userspace didn't,
3573 * so let's just kill the auth data
3574 */
3575 ieee80211_destroy_auth_data(sdata, false);
3576 } else if (ieee80211_probe_auth(sdata)) {
3577 u8 bssid[ETH_ALEN];
3578
3579 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3580
3581 ieee80211_destroy_auth_data(sdata, false);
3582
6ff57cf8 3583 cfg80211_auth_timeout(sdata->dev, bssid);
66e67e41 3584 }
89afe614 3585 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
8d61ffa5 3586 run_again(sdata, ifmgd->auth_data->timeout);
66e67e41 3587
89afe614 3588 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
66e67e41 3589 time_after(jiffies, ifmgd->assoc_data->timeout)) {
989c6505 3590 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
66e67e41 3591 ieee80211_do_assoc(sdata)) {
959867fa 3592 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
66e67e41
JB		 3593
3594 ieee80211_destroy_assoc_data(sdata, false);
959867fa 3595 cfg80211_assoc_timeout(sdata->dev, bss);
66e67e41 3596 }
89afe614 3597 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
8d61ffa5 3598 run_again(sdata, ifmgd->assoc_data->timeout);
66e67e41 3599
392b9ffb 3600 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
b291ba11 3601 ifmgd->associated) {
a43abf29 3602 u8 bssid[ETH_ALEN];
72a8a3ed 3603 int max_tries;
a43abf29 3604
0c1ad2ca 3605 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 3606
72a8a3ed 3607 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
180205bd 3608 max_tries = max_nullfunc_tries;
72a8a3ed 3609 else
180205bd 3610 max_tries = max_probe_tries;
72a8a3ed 3611
4e5ff376
FF		 3612 /* ACK received for nullfunc probing frame */
3613 if (!ifmgd->probe_send_count)
3614 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 3615 else if (ifmgd->nullfunc_failed) {
3616 if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3617 mlme_dbg(sdata,
3618 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3619 bssid, ifmgd->probe_send_count,
3620 max_tries);
04ac3c0e
FF		 3621 ieee80211_mgd_probe_ap_send(sdata);
3622 } else {
bdcbd8e0
JB		 3623 mlme_dbg(sdata,
3624 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3625 bssid);
95acac61 3626 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1
JB		 3627 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3628 false);
04ac3c0e
FF		 3629 }
3630 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
8d61ffa5 3631 run_again(sdata, ifmgd->probe_timeout);
04ac3c0e 3632 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
bdcbd8e0
JB		 3633 mlme_dbg(sdata,
3634 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3635 bssid, probe_wait_ms);
95acac61 3636 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 3637 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
04ac3c0e 3638 } else if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3639 mlme_dbg(sdata,
3640 "No probe response from AP %pM after %dms, try %d/%i\n",
3641 bssid, probe_wait_ms,
3642 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 3643 ieee80211_mgd_probe_ap_send(sdata);
3644 } else {
b291ba11
JB		 3645 /*
3646 * We actually lost the connection ... or did we?
3647 * Let's make sure!
3648 */
b38afa87
BG		 3649 wiphy_debug(local->hw.wiphy,
3650 "%s: No probe response from AP %pM"
3651 " after %dms, disconnecting.\n",
3652 sdata->name,
180205bd 3653 bssid, probe_wait_ms);
04ac3c0e 3654
95acac61 3655 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 3656 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
b291ba11
JB		 3657 }
3658 }
3659
8d61ffa5 3660 sdata_unlock(sdata);
f0706e82
JB		 3661}
3662
b291ba11
JB		 3663static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3664{
3665 struct ieee80211_sub_if_data *sdata =
3666 (struct ieee80211_sub_if_data *) data;
3667 struct ieee80211_local *local = sdata->local;
3668
3669 if (local->quiescing)
3670 return;
3671
e5593f56
MK		 3672 if (sdata->vif.csa_active)
3673 return;
3674
682bd38b 3675 sdata->u.mgd.connection_loss = false;
1e4dcd01
JO		 3676 ieee80211_queue_work(&sdata->local->hw,
3677 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 3678}
3679
3680static void ieee80211_sta_conn_mon_timer(unsigned long data)
3681{
3682 struct ieee80211_sub_if_data *sdata =
3683 (struct ieee80211_sub_if_data *) data;
3684 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3685 struct ieee80211_local *local = sdata->local;
3686
3687 if (local->quiescing)
3688 return;
3689
e5593f56
MK		 3690 if (sdata->vif.csa_active)
3691 return;
3692
42935eca 3693 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 3694}
3695
3696static void ieee80211_sta_monitor_work(struct work_struct *work)
3697{
3698 struct ieee80211_sub_if_data *sdata =
3699 container_of(work, struct ieee80211_sub_if_data,
3700 u.mgd.monitor_work);
3701
3702 ieee80211_mgd_probe_ap(sdata, false);
3703}
3704
9c6bd790
JB		 3705static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3706{
494f1fe5
EP		 3707 u32 flags;
3708
ad935687 3709 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
925e64c3 3710 __ieee80211_stop_poll(sdata);
ad935687 3711
b291ba11 3712 /* let's probe the connection once */
494f1fe5
EP		 3713 flags = sdata->local->hw.flags;
3714 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3715 ieee80211_queue_work(&sdata->local->hw,
3716 &sdata->u.mgd.monitor_work);
b291ba11 3717 /* and do all the other regular work too */
64592c8f 3718 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 3719 }
9c6bd790 3720}
f0706e82 3721
b8360ab8 3722#ifdef CONFIG_PM
1a1cb744
JB		 3723void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
3724{
3725 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3726 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3727
3728 sdata_lock(sdata);
3729
c52666ae
EG		 3730 if (ifmgd->auth_data || ifmgd->assoc_data) {
3731 const u8 *bssid = ifmgd->auth_data ?
3732 ifmgd->auth_data->bss->bssid :
3733 ifmgd->assoc_data->bss->bssid;
3734
1a1cb744 3735 /*
c52666ae
EG		 3736 * If we are trying to authenticate / associate while suspending,
3737 * cfg80211 won't know and won't actually abort those attempts,
3738 * thus we need to do that ourselves.
1a1cb744 3739 */
c52666ae 3740 ieee80211_send_deauth_disassoc(sdata, bssid,
1a1cb744
JB		 3741 IEEE80211_STYPE_DEAUTH,
3742 WLAN_REASON_DEAUTH_LEAVING,
3743 false, frame_buf);
c52666ae
EG		 3744 if (ifmgd->assoc_data)
3745 ieee80211_destroy_assoc_data(sdata, false);
3746 if (ifmgd->auth_data)
3747 ieee80211_destroy_auth_data(sdata, false);
1a1cb744
JB		 3748 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3749 IEEE80211_DEAUTH_FRAME_LEN);
3750 }
3751
3752 sdata_unlock(sdata);
3753}
3754
b8360ab8
JB		 3755void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
3756{
3757 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3758
8d61ffa5 3759 sdata_lock(sdata);
b8360ab8 3760 if (!ifmgd->associated) {
8d61ffa5 3761 sdata_unlock(sdata);
b8360ab8
JB		 3762 return;
3763 }
3764
3765 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
3766 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
3767 mlme_dbg(sdata, "driver requested disconnect after resume\n");
3768 ieee80211_sta_connection_lost(sdata,
3769 ifmgd->associated->bssid,
3770 WLAN_REASON_UNSPECIFIED,
3771 true);
8d61ffa5 3772 sdata_unlock(sdata);
b8360ab8
JB		 3773 return;
3774 }
8d61ffa5 3775 sdata_unlock(sdata);
b8360ab8
JB		 3776}
3777#endif
3778
9c6bd790
JB		 3779/* interface setup */
3780void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 3781{
46900298 3782 struct ieee80211_if_managed *ifmgd;
988c0f72 3783
46900298 3784 ifmgd = &sdata->u.mgd;
b291ba11 3785 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 3786 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 3787 INIT_WORK(&ifmgd->beacon_connection_loss_work,
3788 ieee80211_beacon_connection_loss_work);
882a7c69
JB		 3789 INIT_WORK(&ifmgd->csa_connection_drop_work,
3790 ieee80211_csa_connection_drop_work);
687da132 3791 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
81dd2b88
AN		 3792 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
3793 ieee80211_tdls_peer_del_work);
46900298 3794 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 3795 (unsigned long) sdata);
b291ba11
JB		 3796 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
3797 (unsigned long) sdata);
3798 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
3799 (unsigned long) sdata);
46900298 3800 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 3801 (unsigned long) sdata);
9c6bd790 3802
ab1faead 3803 ifmgd->flags = 0;
1478acb3 3804 ifmgd->powersave = sdata->wdev.ps;
219c3867
AB		 3805 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
3806 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
67baf663 3807 ifmgd->p2p_noa_index = -1;
bbbdff9e 3808
0d8614b4 3809 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
0f78231b
JB		 3810 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
3811 else
3812 ifmgd->req_smps = IEEE80211_SMPS_OFF;
f0706e82
JB		 3813}
3814
77fdaa12
JB		 3815/* scan finished notification */
3816void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 3817{
31ee67a1 3818 struct ieee80211_sub_if_data *sdata;
60f8b39c 3819
77fdaa12
JB		 3820 /* Restart STA timers */
3821 rcu_read_lock();
370bd005
BG		 3822 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3823 if (ieee80211_sdata_running(sdata))
3824 ieee80211_restart_sta_timer(sdata);
3825 }
77fdaa12
JB		 3826 rcu_read_unlock();
3827}
60f8b39c 3828
77fdaa12
JB		 3829int ieee80211_max_network_latency(struct notifier_block *nb,
3830 unsigned long data, void *dummy)
3831{
3832 s32 latency_usec = (s32) data;
3833 struct ieee80211_local *local =
3834 container_of(nb, struct ieee80211_local,
3835 network_latency_notifier);
1fa6f4af 3836
77fdaa12
JB		 3837 mutex_lock(&local->iflist_mtx);
3838 ieee80211_recalc_ps(local, latency_usec);
3839 mutex_unlock(&local->iflist_mtx);
dfe67012 3840
8bd811aa 3841 return NOTIFY_OK;
9c6bd790
JB		 3842}
3843
f2d9d270
JB		 3844static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
3845 struct cfg80211_bss *cbss)
3846{
3847 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3848 const u8 *ht_cap_ie, *vht_cap_ie;
3849 const struct ieee80211_ht_cap *ht_cap;
3850 const struct ieee80211_vht_cap *vht_cap;
3851 u8 chains = 1;
3852
3853 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
3854 return chains;
3855
9caf0364 3856 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
f2d9d270
JB		 3857 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
3858 ht_cap = (void *)(ht_cap_ie + 2);
3859 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
3860 /*
3861 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
3862 * "Tx Unequal Modulation Supported" fields.
3863 */
3864 }
3865
3866 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
3867 return chains;
3868
9caf0364 3869 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
f2d9d270
JB		 3870 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
3871 u8 nss;
3872 u16 tx_mcs_map;
3873
3874 vht_cap = (void *)(vht_cap_ie + 2);
3875 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
3876 for (nss = 8; nss > 0; nss--) {
3877 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
3878 IEEE80211_VHT_MCS_NOT_SUPPORTED)
3879 break;
3880 }
3881 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
3882 chains = max(chains, nss);
3883 }
3884
3885 return chains;
3886}
3887
b17166a7
JB		 3888static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
3889 struct cfg80211_bss *cbss)
a1cf775d
JB		 3890{
3891 struct ieee80211_local *local = sdata->local;
3892 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
53b954ee 3893 const struct ieee80211_ht_cap *ht_cap = NULL;
24398e39 3894 const struct ieee80211_ht_operation *ht_oper = NULL;
f2d9d270 3895 const struct ieee80211_vht_operation *vht_oper = NULL;
24398e39 3896 struct ieee80211_supported_band *sband;
4bf88530 3897 struct cfg80211_chan_def chandef;
f2d9d270 3898 int ret;
a1cf775d 3899
24398e39
JB		 3900 sband = local->hw.wiphy->bands[cbss->channel->band];
3901
f2d9d270
JB		 3902 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
3903 IEEE80211_STA_DISABLE_80P80MHZ |
3904 IEEE80211_STA_DISABLE_160MHZ);
3905
9caf0364
JB		 3906 rcu_read_lock();
3907
f2d9d270
JB		 3908 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3909 sband->ht_cap.ht_supported) {
53b954ee 3910 const u8 *ht_oper_ie, *ht_cap_ie;
24398e39 3911
9caf0364 3912 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
24398e39
JB		 3913 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3914 ht_oper = (void *)(ht_oper_ie + 2);
08e6effa 3915
53b954ee
EP		 3916 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
3917 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
3918 ht_cap = (void *)(ht_cap_ie + 2);
3919
3920 if (!ht_cap) {
08e6effa
JB		 3921 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3922 ht_oper = NULL;
3923 }
24398e39
JB		 3924 }
3925
f2d9d270
JB		 3926 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3927 sband->vht_cap.vht_supported) {
08e6effa 3928 const u8 *vht_oper_ie, *vht_cap;
f2d9d270 3929
9caf0364
JB		 3930 vht_oper_ie = ieee80211_bss_get_ie(cbss,
3931 WLAN_EID_VHT_OPERATION);
f2d9d270
JB		 3932 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
3933 vht_oper = (void *)(vht_oper_ie + 2);
3934 if (vht_oper && !ht_oper) {
3935 vht_oper = NULL;
bdcbd8e0 3936 sdata_info(sdata,
f2d9d270 3937 "AP advertised VHT without HT, disabling both\n");
cb145022
JB		 3938 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3939 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
24398e39 3940 }
08e6effa
JB		 3941
3942 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
3943 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
3944 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3945 vht_oper = NULL;
3946 }
24398e39
JB		 3947 }
3948
f2d9d270
JB		 3949 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
3950 cbss->channel,
53b954ee 3951 ht_cap, ht_oper, vht_oper,
5cdaed1e 3952 &chandef, false);
04ecd257 3953
f2d9d270
JB		 3954 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
3955 local->rx_chains);
24398e39 3956
9caf0364
JB		 3957 rcu_read_unlock();
3958
04ecd257
JB		 3959 /* will change later if needed */
3960 sdata->smps_mode = IEEE80211_SMPS_OFF;
3961
34a3740d 3962 mutex_lock(&local->mtx);
f2d9d270
JB		 3963 /*
3964 * If this fails (possibly due to channel context sharing
3965 * on incompatible channels, e.g. 80+80 and 160 sharing the
3966 * same control channel) try to use a smaller bandwidth.
3967 */
3968 ret = ieee80211_vif_use_channel(sdata, &chandef,
3969 IEEE80211_CHANCTX_SHARED);
0418a445
SW		 3970
3971 /* don't downgrade for 5 and 10 MHz channels, though. */
3972 if (chandef.width == NL80211_CHAN_WIDTH_5 ||
3973 chandef.width == NL80211_CHAN_WIDTH_10)
34a3740d 3974 goto out;
0418a445 3975
d601cd8d 3976 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
e6b7cde4 3977 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
d601cd8d
JB		 3978 ret = ieee80211_vif_use_channel(sdata, &chandef,
3979 IEEE80211_CHANCTX_SHARED);
3980 }
34a3740d
JB		 3981 out:
3982 mutex_unlock(&local->mtx);
f2d9d270 3983 return ret;
b17166a7
JB		 3984}
3985
3986static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
3987 struct cfg80211_bss *cbss, bool assoc)
3988{
3989 struct ieee80211_local *local = sdata->local;
3990 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3991 struct ieee80211_bss *bss = (void *)cbss->priv;
3992 struct sta_info *new_sta = NULL;
3993 bool have_sta = false;
3994 int err;
3995
3996 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3997 return -EINVAL;
3998
3999 if (assoc) {
4000 rcu_read_lock();
4001 have_sta = sta_info_get(sdata, cbss->bssid);
4002 rcu_read_unlock();
4003 }
4004
4005 if (!have_sta) {
4006 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4007 if (!new_sta)
4008 return -ENOMEM;
4009 }
13e0c8e3 4010 if (new_sta) {
5d6a1b06
JB		 4011 u32 rates = 0, basic_rates = 0;
4012 bool have_higher_than_11mbit;
4013 int min_rate = INT_MAX, min_rate_index = -1;
2103dec1 4014 struct ieee80211_chanctx_conf *chanctx_conf;
b17166a7 4015 struct ieee80211_supported_band *sband;
8cef2c9d 4016 const struct cfg80211_bss_ies *ies;
2103dec1
SW		 4017 int shift;
4018 u32 rate_flags;
b17166a7
JB		 4019
4020 sband = local->hw.wiphy->bands[cbss->channel->band];
4021
4022 err = ieee80211_prep_channel(sdata, cbss);
4023 if (err) {
4024 sta_info_free(local, new_sta);
2103dec1 4025 return -EINVAL;
b17166a7 4026 }
2103dec1
SW		 4027 shift = ieee80211_vif_get_shift(&sdata->vif);
4028
4029 rcu_read_lock();
4030 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4031 if (WARN_ON(!chanctx_conf)) {
4032 rcu_read_unlock();
c368ddaa 4033 sta_info_free(local, new_sta);
2103dec1
SW		 4034 return -EINVAL;
4035 }
4036 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
4037 rcu_read_unlock();
5d6a1b06 4038
5d6a1b06
JB		 4039 ieee80211_get_rates(sband, bss->supp_rates,
4040 bss->supp_rates_len,
4041 &rates, &basic_rates,
4042 &have_higher_than_11mbit,
2103dec1
SW		 4043 &min_rate, &min_rate_index,
4044 shift, rate_flags);
5d6a1b06
JB		 4045
4046 /*
4047 * This used to be a workaround for basic rates missing
4048 * in the association response frame. Now that we no
4049 * longer use the basic rates from there, it probably
4050 * doesn't happen any more, but keep the workaround so
4051 * in case some *other* APs are buggy in different ways
4052 * we can connect -- with a warning.
4053 */
4054 if (!basic_rates && min_rate_index >= 0) {
bdcbd8e0
JB		 4055 sdata_info(sdata,
4056 "No basic rates, using min rate instead\n");
5d6a1b06
JB		 4057 basic_rates = BIT(min_rate_index);
4058 }
4059
13e0c8e3 4060 new_sta->sta.supp_rates[cbss->channel->band] = rates;
5d6a1b06
JB		 4061 sdata->vif.bss_conf.basic_rates = basic_rates;
4062
4063 /* cf. IEEE 802.11 9.2.12 */
55de908a 4064 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
5d6a1b06
JB		 4065 have_higher_than_11mbit)
4066 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
4067 else
4068 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
4069
4070 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
4071
8c358bcd
JB		 4072 /* set timing information */
4073 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
8cef2c9d 4074 rcu_read_lock();
ef429dad
JB		 4075 ies = rcu_dereference(cbss->beacon_ies);
4076 if (ies) {
4077 const u8 *tim_ie;
4078
4079 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4080 sdata->vif.bss_conf.sync_device_ts =
4081 bss->device_ts_beacon;
4082 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4083 ies->data, ies->len);
4084 if (tim_ie && tim_ie[1] >= 2)
4085 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
4086 else
4087 sdata->vif.bss_conf.sync_dtim_count = 0;
4088 } else if (!(local->hw.flags &
4089 IEEE80211_HW_TIMING_BEACON_ONLY)) {
4090 ies = rcu_dereference(cbss->proberesp_ies);
4091 /* must be non-NULL since beacon IEs were NULL */
4092 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4093 sdata->vif.bss_conf.sync_device_ts =
4094 bss->device_ts_presp;
4095 sdata->vif.bss_conf.sync_dtim_count = 0;
4096 } else {
4097 sdata->vif.bss_conf.sync_tsf = 0;
4098 sdata->vif.bss_conf.sync_device_ts = 0;
4099 sdata->vif.bss_conf.sync_dtim_count = 0;
4100 }
8cef2c9d 4101 rcu_read_unlock();
8c358bcd
JB		 4102
4103 /* tell driver about BSSID, basic rates and timing */
5d6a1b06 4104 ieee80211_bss_info_change_notify(sdata,
8c358bcd
JB		 4105 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4106 BSS_CHANGED_BEACON_INT);
a1cf775d
JB		 4107
4108 if (assoc)
13e0c8e3 4109 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
a1cf775d 4110
13e0c8e3
JB		 4111 err = sta_info_insert(new_sta);
4112 new_sta = NULL;
a1cf775d 4113 if (err) {
bdcbd8e0
JB		 4114 sdata_info(sdata,
4115 "failed to insert STA entry for the AP (error %d)\n",
4116 err);
a1cf775d
JB		 4117 return err;
4118 }
4119 } else
b203ca39 4120 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
a1cf775d
JB		 4121
4122 return 0;
4123}
4124
77fdaa12
JB		 4125/* config hooks */
4126int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4127 struct cfg80211_auth_request *req)
9c6bd790 4128{
66e67e41
JB		 4129 struct ieee80211_local *local = sdata->local;
4130 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4131 struct ieee80211_mgd_auth_data *auth_data;
77fdaa12 4132 u16 auth_alg;
66e67e41
JB		 4133 int err;
4134
4135 /* prepare auth data structure */
9c6bd790 4136
77fdaa12
JB		 4137 switch (req->auth_type) {
4138 case NL80211_AUTHTYPE_OPEN_SYSTEM:
4139 auth_alg = WLAN_AUTH_OPEN;
4140 break;
4141 case NL80211_AUTHTYPE_SHARED_KEY:
66e67e41 4142 if (IS_ERR(local->wep_tx_tfm))
9dca9c49 4143 return -EOPNOTSUPP;
77fdaa12
JB		 4144 auth_alg = WLAN_AUTH_SHARED_KEY;
4145 break;
4146 case NL80211_AUTHTYPE_FT:
4147 auth_alg = WLAN_AUTH_FT;
4148 break;
4149 case NL80211_AUTHTYPE_NETWORK_EAP:
4150 auth_alg = WLAN_AUTH_LEAP;
4151 break;
6b8ece3a
JM		 4152 case NL80211_AUTHTYPE_SAE:
4153 auth_alg = WLAN_AUTH_SAE;
4154 break;
77fdaa12
JB		 4155 default:
4156 return -EOPNOTSUPP;
60f8b39c 4157 }
77fdaa12 4158
6b8ece3a
JM		 4159 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
4160 req->ie_len, GFP_KERNEL);
66e67e41 4161 if (!auth_data)
9c6bd790 4162 return -ENOMEM;
77fdaa12 4163
66e67e41 4164 auth_data->bss = req->bss;
77fdaa12 4165
6b8ece3a
JM		 4166 if (req->sae_data_len >= 4) {
4167 __le16 *pos = (__le16 *) req->sae_data;
4168 auth_data->sae_trans = le16_to_cpu(pos[0]);
4169 auth_data->sae_status = le16_to_cpu(pos[1]);
4170 memcpy(auth_data->data, req->sae_data + 4,
4171 req->sae_data_len - 4);
4172 auth_data->data_len += req->sae_data_len - 4;
4173 }
4174
77fdaa12 4175 if (req->ie && req->ie_len) {
6b8ece3a
JM		 4176 memcpy(&auth_data->data[auth_data->data_len],
4177 req->ie, req->ie_len);
4178 auth_data->data_len += req->ie_len;
9c6bd790 4179 }
77fdaa12 4180
fffd0934 4181 if (req->key && req->key_len) {
66e67e41
JB		 4182 auth_data->key_len = req->key_len;
4183 auth_data->key_idx = req->key_idx;
4184 memcpy(auth_data->key, req->key, req->key_len);
fffd0934
JB		 4185 }
4186
66e67e41 4187 auth_data->algorithm = auth_alg;
60f8b39c 4188
66e67e41 4189 /* try to authenticate/probe */
2a33bee2 4190
66e67e41
JB		 4191 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4192 ifmgd->assoc_data) {
4193 err = -EBUSY;
4194 goto err_free;
2a33bee2
GE		 4195 }
4196
66e67e41
JB		 4197 if (ifmgd->auth_data)
4198 ieee80211_destroy_auth_data(sdata, false);
2a33bee2 4199
66e67e41
JB		 4200 /* prep auth_data so we don't go into idle on disassoc */
4201 ifmgd->auth_data = auth_data;
af6b6374 4202
7b119dc0
JB		 4203 if (ifmgd->associated) {
4204 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4205
4206 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4207 WLAN_REASON_UNSPECIFIED,
4208 false, frame_buf);
4209
6ff57cf8
JB		 4210 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4211 sizeof(frame_buf));
7b119dc0 4212 }
af6b6374 4213
bdcbd8e0 4214 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
e5b900d2 4215
a1cf775d
JB		 4216 err = ieee80211_prep_connection(sdata, req->bss, false);
4217 if (err)
66e67e41 4218 goto err_clear;
af6b6374 4219
66e67e41
JB		 4220 err = ieee80211_probe_auth(sdata);
4221 if (err) {
66e67e41
JB		 4222 sta_info_destroy_addr(sdata, req->bss->bssid);
4223 goto err_clear;
4224 }
4225
4226 /* hold our own reference */
5b112d3d 4227 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
8d61ffa5 4228 return 0;
66e67e41
JB		 4229
4230 err_clear:
3d2abdfd
EP		 4231 memset(ifmgd->bssid, 0, ETH_ALEN);
4232 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 4233 ifmgd->auth_data = NULL;
4234 err_free:
4235 kfree(auth_data);
66e67e41 4236 return err;
af6b6374
JB		 4237}
4238
095d81ce
JB		 4239static bool ieee80211_usable_wmm_params(struct ieee80211_sub_if_data *sdata,
4240 const u8 *wmm_param, int len)
4241{
4242 const u8 *pos;
4243 size_t left;
4244
4245 if (len < 8)
4246 return false;
4247
4248 if (wmm_param[5] != 1 /* version */)
4249 return false;
4250
4251 pos = wmm_param + 8;
4252 left = len - 8;
4253
4254 for (; left >= 4; left -= 4, pos += 4) {
4255 u8 aifsn = pos[0] & 0x0f;
4256 u8 ecwmin = pos[1] & 0x0f;
4257 u8 ecwmax = (pos[1] & 0xf0) >> 4;
4258 int aci = (pos[0] >> 5) & 0x03;
4259
4260 if (aifsn < 2) {
4261 sdata_info(sdata,
4262 "AP has invalid WMM params (AIFSN=%d for ACI %d), disabling WMM\n",
4263 aifsn, aci);
4264 return false;
4265 }
4266 if (ecwmin > ecwmax) {
4267 sdata_info(sdata,
4268 "AP has invalid WMM params (ECWmin/max=%d/%d for ACI %d), disabling WMM\n",
4269 ecwmin, ecwmax, aci);
4270 return false;
4271 }
4272 }
4273
4274 return true;
4275}
4276
77fdaa12
JB		 4277int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4278 struct cfg80211_assoc_request *req)
f0706e82 4279{
66e67e41 4280 struct ieee80211_local *local = sdata->local;
77fdaa12 4281 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 4282 struct ieee80211_bss *bss = (void *)req->bss->priv;
66e67e41 4283 struct ieee80211_mgd_assoc_data *assoc_data;
c65dd147 4284 const struct cfg80211_bss_ies *beacon_ies;
4e74bfdb 4285 struct ieee80211_supported_band *sband;
b08fbbd8 4286 const u8 *ssidie, *ht_ie, *vht_ie;
2a33bee2 4287 int i, err;
f0706e82 4288
66e67e41
JB		 4289 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4290 if (!assoc_data)
4291 return -ENOMEM;
4292
9caf0364
JB		 4293 rcu_read_lock();
4294 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4295 if (!ssidie) {
4296 rcu_read_unlock();
4297 kfree(assoc_data);
4298 return -EINVAL;
4299 }
4300 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4301 assoc_data->ssid_len = ssidie[1];
4302 rcu_read_unlock();
4303
7b119dc0
JB		 4304 if (ifmgd->associated) {
4305 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4306
4307 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4308 WLAN_REASON_UNSPECIFIED,
4309 false, frame_buf);
4310
6ff57cf8
JB		 4311 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4312 sizeof(frame_buf));
7b119dc0 4313 }
66e67e41
JB		 4314
4315 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4316 err = -EBUSY;
4317 goto err_free;
af6b6374 4318 }
77fdaa12 4319
66e67e41
JB		 4320 if (ifmgd->assoc_data) {
4321 err = -EBUSY;
4322 goto err_free;
4323 }
77fdaa12 4324
66e67e41
JB		 4325 if (ifmgd->auth_data) {
4326 bool match;
4327
4328 /* keep sta info, bssid if matching */
b203ca39 4329 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
66e67e41 4330 ieee80211_destroy_auth_data(sdata, match);
2a33bee2
GE		 4331 }
4332
66e67e41 4333 /* prepare assoc data */
095d81ce 4334
d8ec4433
JO		 4335 ifmgd->beacon_crc_valid = false;
4336
095d81ce
JB		 4337 assoc_data->wmm = bss->wmm_used &&
4338 (local->hw.queues >= IEEE80211_NUM_ACS);
4339 if (assoc_data->wmm) {
4340 /* try to check validity of WMM params IE */
4341 const struct cfg80211_bss_ies *ies;
4342 const u8 *wp, *start, *end;
4343
4344 rcu_read_lock();
4345 ies = rcu_dereference(req->bss->ies);
4346 start = ies->data;
4347 end = start + ies->len;
4348
4349 while (true) {
4350 wp = cfg80211_find_vendor_ie(
4351 WLAN_OUI_MICROSOFT,
4352 WLAN_OUI_TYPE_MICROSOFT_WMM,
4353 start, end - start);
4354 if (!wp)
4355 break;
4356 start = wp + wp[1] + 2;
4357 /* if this IE is too short, try the next */
4358 if (wp[1] <= 4)
4359 continue;
4360 /* if this IE is WMM params, we found what we wanted */
4361 if (wp[6] == 1)
4362 break;
4363 }
4364
4365 if (!wp || !ieee80211_usable_wmm_params(sdata, wp + 2,
4366 wp[1] - 2)) {
4367 assoc_data->wmm = false;
4368 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
4369 }
4370 rcu_read_unlock();
4371 }
4372
de5036aa
JB		 4373 /*
4374 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4375 * We still associate in non-HT mode (11a/b/g) if any one of these
4376 * ciphers is configured as pairwise.
4377 * We can set this to true for non-11n hardware, that'll be checked
4378 * separately along with the peer capabilities.
4379 */
1c4cb928 4380 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
77fdaa12
JB		 4381 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4382 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
1c4cb928 4383 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
a8243b72 4384 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
d545daba 4385 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
1c4cb928 4386 netdev_info(sdata->dev,
d545daba 4387 "disabling HT/VHT due to WEP/TKIP use\n");
1c4cb928
JB		 4388 }
4389 }
77fdaa12 4390
d545daba 4391 if (req->flags & ASSOC_REQ_DISABLE_HT) {
a8243b72 4392 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
d545daba
MP		 4393 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4394 }
ef96a842 4395
dd5ecfea
JB		 4396 if (req->flags & ASSOC_REQ_DISABLE_VHT)
4397 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4398
4e74bfdb
JB		 4399 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4400 sband = local->hw.wiphy->bands[req->bss->channel->band];
4401 if (!sband->ht_cap.ht_supported ||
095d81ce
JB		 4402 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4403 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
a8243b72 4404 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
095d81ce
JB		 4405 if (!bss->wmm_used &&
4406 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
1b49de26
JB		 4407 netdev_info(sdata->dev,
4408 "disabling HT as WMM/QoS is not supported by the AP\n");
1c4cb928 4409 }
4e74bfdb 4410
d545daba
MP		 4411 /* disable VHT if we don't support it or the AP doesn't use WMM */
4412 if (!sband->vht_cap.vht_supported ||
095d81ce
JB		 4413 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4414 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
d545daba 4415 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
095d81ce
JB		 4416 if (!bss->wmm_used &&
4417 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
1b49de26
JB		 4418 netdev_info(sdata->dev,
4419 "disabling VHT as WMM/QoS is not supported by the AP\n");
d545daba
MP		 4420 }
4421
ef96a842
BG		 4422 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4423 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4424 sizeof(ifmgd->ht_capa_mask));
4425
dd5ecfea
JB		 4426 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4427 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4428 sizeof(ifmgd->vht_capa_mask));
4429
77fdaa12 4430 if (req->ie && req->ie_len) {
66e67e41
JB		 4431 memcpy(assoc_data->ie, req->ie, req->ie_len);
4432 assoc_data->ie_len = req->ie_len;
4433 }
f679f65d 4434
66e67e41 4435 assoc_data->bss = req->bss;
f679f65d 4436
af6b6374
JB		 4437 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4438 if (ifmgd->powersave)
04ecd257 4439 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
af6b6374 4440 else
04ecd257 4441 sdata->smps_mode = IEEE80211_SMPS_OFF;
af6b6374 4442 } else
04ecd257 4443 sdata->smps_mode = ifmgd->req_smps;
af6b6374 4444
66e67e41 4445 assoc_data->capability = req->bss->capability;
66e67e41
JB		 4446 assoc_data->supp_rates = bss->supp_rates;
4447 assoc_data->supp_rates_len = bss->supp_rates_len;
9dde6423 4448
9caf0364 4449 rcu_read_lock();
9dde6423
JB		 4450 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4451 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4452 assoc_data->ap_ht_param =
4453 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4454 else
a8243b72 4455 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
b08fbbd8
JB		 4456 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4457 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4458 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4459 sizeof(struct ieee80211_vht_cap));
4460 else
4461 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
9caf0364 4462 rcu_read_unlock();
63f170e0 4463
ab13315a 4464 if (bss->wmm_used && bss->uapsd_supported &&
bb512ad0 4465 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
76f0303d 4466 assoc_data->uapsd = true;
ab13315a
KV		 4467 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4468 } else {
76f0303d 4469 assoc_data->uapsd = false;
ab13315a
KV		 4470 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4471 }
4472
77fdaa12 4473 if (req->prev_bssid)
66e67e41 4474 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12
JB		 4475
4476 if (req->use_mfp) {
4477 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4478 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4479 } else {
4480 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4481 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4482 }
4483
cd2f5dd7
AK		 4484 if (req->flags & ASSOC_REQ_USE_RRM)
4485 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
4486 else
4487 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
4488
77fdaa12
JB		 4489 if (req->crypto.control_port)
4490 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4491 else
4492 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4493
a621fa4d
JB		 4494 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4495 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
2475b1cc
MS		 4496 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
4497 sdata->vif.type);
a621fa4d 4498
66e67e41
JB		 4499 /* kick off associate process */
4500
4501 ifmgd->assoc_data = assoc_data;
826262c3 4502 ifmgd->dtim_period = 0;
989c6505 4503 ifmgd->have_beacon = false;
66e67e41 4504
a1cf775d
JB		 4505 err = ieee80211_prep_connection(sdata, req->bss, true);
4506 if (err)
4507 goto err_clear;
66e67e41 4508
c65dd147
EG		 4509 rcu_read_lock();
4510 beacon_ies = rcu_dereference(req->bss->beacon_ies);
826262c3 4511
c65dd147
EG		 4512 if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC &&
4513 !beacon_ies) {
4514 /*
4515 * Wait up to one beacon interval ...
4516 * should this be more if we miss one?
4517 */
4518 sdata_info(sdata, "waiting for beacon from %pM\n",
4519 ifmgd->bssid);
4520 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
89afe614 4521 assoc_data->timeout_started = true;
c65dd147
EG		 4522 assoc_data->need_beacon = true;
4523 } else if (beacon_ies) {
4524 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4525 beacon_ies->data,
4526 beacon_ies->len);
ef429dad
JB		 4527 u8 dtim_count = 0;
4528
c65dd147
EG		 4529 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4530 const struct ieee80211_tim_ie *tim;
4531 tim = (void *)(tim_ie + 2);
4532 ifmgd->dtim_period = tim->dtim_period;
ef429dad 4533 dtim_count = tim->dtim_count;
826262c3 4534 }
989c6505 4535 ifmgd->have_beacon = true;
66e67e41 4536 assoc_data->timeout = jiffies;
89afe614 4537 assoc_data->timeout_started = true;
ef429dad
JB		 4538
4539 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
4540 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4541 sdata->vif.bss_conf.sync_device_ts =
4542 bss->device_ts_beacon;
4543 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4544 }
c65dd147
EG		 4545 } else {
4546 assoc_data->timeout = jiffies;
89afe614 4547 assoc_data->timeout_started = true;
66e67e41 4548 }
c65dd147
EG		 4549 rcu_read_unlock();
4550
8d61ffa5 4551 run_again(sdata, assoc_data->timeout);
66e67e41 4552
fcff4f10
PS		 4553 if (bss->corrupt_data) {
4554 char *corrupt_type = "data";
4555 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4556 if (bss->corrupt_data &
4557 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4558 corrupt_type = "beacon and probe response";
4559 else
4560 corrupt_type = "beacon";
4561 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4562 corrupt_type = "probe response";
bdcbd8e0
JB		 4563 sdata_info(sdata, "associating with AP with corrupt %s\n",
4564 corrupt_type);
fcff4f10
PS		 4565 }
4566
8d61ffa5 4567 return 0;
66e67e41 4568 err_clear:
3d2abdfd
EP		 4569 memset(ifmgd->bssid, 0, ETH_ALEN);
4570 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 4571 ifmgd->assoc_data = NULL;
4572 err_free:
4573 kfree(assoc_data);
66e67e41 4574 return err;
f0706e82
JB		 4575}
4576
77fdaa12 4577int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
63c9c5e7 4578 struct cfg80211_deauth_request *req)
f0706e82 4579{
46900298 4580 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 4581 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
6863255b 4582 bool tx = !req->local_state_change;
f0706e82 4583
c9c3a060
JB		 4584 if (ifmgd->auth_data &&
4585 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
4586 sdata_info(sdata,
4587 "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
4588 req->bssid, req->reason_code,
4589 ieee80211_get_reason_code_string(req->reason_code));
0ff71613 4590
8c7d857c 4591 drv_mgd_prepare_tx(sdata->local, sdata);
37ad3888
JB		 4592 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4593 IEEE80211_STYPE_DEAUTH,
6863255b 4594 req->reason_code, tx,
37ad3888 4595 frame_buf);
86552017 4596 ieee80211_destroy_auth_data(sdata, false);
c9c3a060
JB		 4597 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4598 IEEE80211_DEAUTH_FRAME_LEN);
86552017 4599
c9c3a060 4600 return 0;
8c7d857c
EG		 4601 }
4602
86552017
JB		 4603 if (ifmgd->associated &&
4604 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
c9c3a060
JB		 4605 sdata_info(sdata,
4606 "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
4607 req->bssid, req->reason_code,
4608 ieee80211_get_reason_code_string(req->reason_code));
4609
86552017
JB		 4610 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4611 req->reason_code, tx, frame_buf);
6ff57cf8
JB		 4612 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4613 IEEE80211_DEAUTH_FRAME_LEN);
c9c3a060
JB		 4614 return 0;
4615 }
86552017 4616
c9c3a060 4617 return -ENOTCONN;
f0706e82 4618}
84363e6e 4619
77fdaa12 4620int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 4621 struct cfg80211_disassoc_request *req)
9c6bd790 4622{
77fdaa12 4623 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 4624 u8 bssid[ETH_ALEN];
6ae16775 4625 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
9c6bd790 4626
8d8b261a
JB		 4627 /*
4628 * cfg80211 should catch this ... but it's racy since
4629 * we can receive a disassoc frame, process it, hand it
4630 * to cfg80211 while that's in a locked section already
4631 * trying to tell us that the user wants to disconnect.
4632 */
8d61ffa5 4633 if (ifmgd->associated != req->bss)
77fdaa12 4634 return -ENOLINK;
77fdaa12 4635
bdcbd8e0 4636 sdata_info(sdata,
dfa1ad29
CO		 4637 "disassociating from %pM by local choice (Reason: %u=%s)\n",
4638 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
0ff71613 4639
e69e95db 4640 memcpy(bssid, req->bss->bssid, ETH_ALEN);
37ad3888
JB		 4641 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4642 req->reason_code, !req->local_state_change,
4643 frame_buf);
10f644a4 4644
6ff57cf8
JB		 4645 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4646 IEEE80211_DEAUTH_FRAME_LEN);
bc83b681 4647
10f644a4
JB		 4648 return 0;
4649}
026331c4 4650
afa762f6 4651void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
54e4ffb2
JB		 4652{
4653 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4654
49921859
BG		 4655 /*
4656 * Make sure some work items will not run after this,
4657 * they will not do anything but might not have been
4658 * cancelled when disconnecting.
4659 */
4660 cancel_work_sync(&ifmgd->monitor_work);
4661 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
4662 cancel_work_sync(&ifmgd->request_smps_work);
4663 cancel_work_sync(&ifmgd->csa_connection_drop_work);
4664 cancel_work_sync(&ifmgd->chswitch_work);
81dd2b88 4665 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
49921859 4666
8d61ffa5 4667 sdata_lock(sdata);
959867fa
JB		 4668 if (ifmgd->assoc_data) {
4669 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
54e4ffb2 4670 ieee80211_destroy_assoc_data(sdata, false);
959867fa
JB		 4671 cfg80211_assoc_timeout(sdata->dev, bss);
4672 }
54e4ffb2
JB		 4673 if (ifmgd->auth_data)
4674 ieee80211_destroy_auth_data(sdata, false);
4675 del_timer_sync(&ifmgd->timer);
8d61ffa5 4676 sdata_unlock(sdata);
54e4ffb2
JB		 4677}
4678
a97c13c3
JO		 4679void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
4680 enum nl80211_cqm_rssi_threshold_event rssi_event,
4681 gfp_t gfp)
4682{
4683 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4684
b5878a2d
JB		 4685 trace_api_cqm_rssi_notify(sdata, rssi_event);
4686
a97c13c3
JO		 4687 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
4688}
4689EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
Linux kernel - Deliverables
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