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Merge tag 'multiplatform' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
[mirror_ubuntu-jammy-kernel.git] / net / mac80211 / mlme.c
CommitLineData
f0706e82
JB		 1/*
2 * BSS client mode implementation
5394af4d 3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
f0706e82
JB		 4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
5b323edb 14#include <linux/delay.h>
f0706e82
JB		 15#include <linux/if_ether.h>
16#include <linux/skbuff.h>
f0706e82 17#include <linux/if_arp.h>
f0706e82 18#include <linux/etherdevice.h>
d9b93842 19#include <linux/moduleparam.h>
d0709a65 20#include <linux/rtnetlink.h>
e8db0be1 21#include <linux/pm_qos.h>
d91f36db 22#include <linux/crc32.h>
5a0e3ad6 23#include <linux/slab.h>
bc3b2d7f 24#include <linux/export.h>
f0706e82 25#include <net/mac80211.h>
472dbc45 26#include <asm/unaligned.h>
60f8b39c 27
f0706e82 28#include "ieee80211_i.h"
24487981 29#include "driver-ops.h"
2c8dccc7
JB		 30#include "rate.h"
31#include "led.h"
f0706e82 32
1672c0e3
JB		 33#define IEEE80211_AUTH_TIMEOUT (HZ / 5)
34#define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10)
35#define IEEE80211_AUTH_MAX_TRIES 3
36#define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
37#define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
38#define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10)
39#define IEEE80211_ASSOC_MAX_TRIES 3
66e67e41 40
180205bd
BG		 41static int max_nullfunc_tries = 2;
42module_param(max_nullfunc_tries, int, 0644);
43MODULE_PARM_DESC(max_nullfunc_tries,
44 "Maximum nullfunc tx tries before disconnecting (reason 4).");
45
46static int max_probe_tries = 5;
47module_param(max_probe_tries, int, 0644);
48MODULE_PARM_DESC(max_probe_tries,
49 "Maximum probe tries before disconnecting (reason 4).");
b291ba11
JB		 50
51/*
7ccc8bd7
FF		 52 * Beacon loss timeout is calculated as N frames times the
53 * advertised beacon interval. This may need to be somewhat
54 * higher than what hardware might detect to account for
55 * delays in the host processing frames. But since we also
56 * probe on beacon miss before declaring the connection lost
57 * default to what we want.
b291ba11 58 */
7ccc8bd7
FF		 59#define IEEE80211_BEACON_LOSS_COUNT 7
60
b291ba11
JB		 61/*
62 * Time the connection can be idle before we probe
63 * it to see if we can still talk to the AP.
64 */
d1c5091f 65#define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
b291ba11
JB		 66/*
67 * Time we wait for a probe response after sending
68 * a probe request because of beacon loss or for
69 * checking the connection still works.
70 */
180205bd
BG		 71static int probe_wait_ms = 500;
72module_param(probe_wait_ms, int, 0644);
73MODULE_PARM_DESC(probe_wait_ms,
74 "Maximum time(ms) to wait for probe response"
75 " before disconnecting (reason 4).");
f0706e82 76
17e4ec14
JM		 77/*
78 * Weight given to the latest Beacon frame when calculating average signal
79 * strength for Beacon frames received in the current BSS. This must be
80 * between 1 and 15.
81 */
82#define IEEE80211_SIGNAL_AVE_WEIGHT 3
83
391a200a
JM		 84/*
85 * How many Beacon frames need to have been used in average signal strength
86 * before starting to indicate signal change events.
87 */
88#define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
89
5bb644a0
JB		 90#define TMR_RUNNING_TIMER 0
91#define TMR_RUNNING_CHANSW 1
92
77fdaa12
JB		 93/*
94 * All cfg80211 functions have to be called outside a locked
95 * section so that they can acquire a lock themselves... This
96 * is much simpler than queuing up things in cfg80211, but we
97 * do need some indirection for that here.
98 */
99enum rx_mgmt_action {
100 /* no action required */
101 RX_MGMT_NONE,
102
77fdaa12
JB		 103 /* caller must call cfg80211_send_deauth() */
104 RX_MGMT_CFG80211_DEAUTH,
105
106 /* caller must call cfg80211_send_disassoc() */
107 RX_MGMT_CFG80211_DISASSOC,
66e67e41
JB		 108
109 /* caller must call cfg80211_send_rx_auth() */
110 RX_MGMT_CFG80211_RX_AUTH,
111
112 /* caller must call cfg80211_send_rx_assoc() */
113 RX_MGMT_CFG80211_RX_ASSOC,
114
115 /* caller must call cfg80211_send_assoc_timeout() */
116 RX_MGMT_CFG80211_ASSOC_TIMEOUT,
30eb1dc2
JB		 117
118 /* used when a processed beacon causes a deauth */
119 RX_MGMT_CFG80211_TX_DEAUTH,
77fdaa12
JB		 120};
121
5484e237 122/* utils */
77fdaa12
JB		 123static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd)
124{
46a5ebaf 125 lockdep_assert_held(&ifmgd->mtx);
77fdaa12
JB		 126}
127
ca386f31
JB		 128/*
129 * We can have multiple work items (and connection probing)
130 * scheduling this timer, but we need to take care to only
131 * reschedule it when it should fire _earlier_ than it was
132 * asked for before, or if it's not pending right now. This
133 * function ensures that. Note that it then is required to
134 * run this function for all timeouts after the first one
135 * has happened -- the work that runs from this timer will
136 * do that.
137 */
66e67e41 138static void run_again(struct ieee80211_if_managed *ifmgd, unsigned long timeout)
ca386f31
JB		 139{
140 ASSERT_MGD_MTX(ifmgd);
141
142 if (!timer_pending(&ifmgd->timer) ||
143 time_before(timeout, ifmgd->timer.expires))
144 mod_timer(&ifmgd->timer, timeout);
145}
146
d3a910a8 147void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
b291ba11 148{
c1288b12 149 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
b291ba11
JB		 150 return;
151
7eeff74c
JB		 152 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
153 return;
154
b291ba11 155 mod_timer(&sdata->u.mgd.bcn_mon_timer,
7ccc8bd7 156 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
b291ba11
JB		 157}
158
be099e82
LR		 159void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
160{
0c699c3a
LR		 161 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
162
8628172f
SG		 163 if (unlikely(!sdata->u.mgd.associated))
164 return;
165
be099e82
LR		 166 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
167 return;
168
169 mod_timer(&sdata->u.mgd.conn_mon_timer,
170 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
0c699c3a
LR		 171
172 ifmgd->probe_send_count = 0;
be099e82
LR		 173}
174
5484e237 175static int ecw2cw(int ecw)
60f8b39c 176{
5484e237 177 return (1 << ecw) - 1;
60f8b39c
JB		 178}
179
6565ec9b
JB		 180static u32 chandef_downgrade(struct cfg80211_chan_def *c)
181{
182 u32 ret;
183 int tmp;
184
185 switch (c->width) {
186 case NL80211_CHAN_WIDTH_20:
187 c->width = NL80211_CHAN_WIDTH_20_NOHT;
188 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
189 break;
190 case NL80211_CHAN_WIDTH_40:
191 c->width = NL80211_CHAN_WIDTH_20;
192 c->center_freq1 = c->chan->center_freq;
193 ret = IEEE80211_STA_DISABLE_40MHZ |
194 IEEE80211_STA_DISABLE_VHT;
195 break;
196 case NL80211_CHAN_WIDTH_80:
197 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
198 /* n_P40 */
199 tmp /= 2;
200 /* freq_P40 */
201 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
202 c->width = NL80211_CHAN_WIDTH_40;
203 ret = IEEE80211_STA_DISABLE_VHT;
204 break;
205 case NL80211_CHAN_WIDTH_80P80:
206 c->center_freq2 = 0;
207 c->width = NL80211_CHAN_WIDTH_80;
208 ret = IEEE80211_STA_DISABLE_80P80MHZ |
209 IEEE80211_STA_DISABLE_160MHZ;
210 break;
211 case NL80211_CHAN_WIDTH_160:
212 /* n_P20 */
213 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
214 /* n_P80 */
215 tmp /= 4;
216 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
217 c->width = NL80211_CHAN_WIDTH_80;
218 ret = IEEE80211_STA_DISABLE_80P80MHZ |
219 IEEE80211_STA_DISABLE_160MHZ;
220 break;
221 default:
222 case NL80211_CHAN_WIDTH_20_NOHT:
223 WARN_ON_ONCE(1);
224 c->width = NL80211_CHAN_WIDTH_20_NOHT;
225 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
226 break;
227 }
228
229 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
230
231 return ret;
232}
233
234static u32
235ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
236 struct ieee80211_supported_band *sband,
237 struct ieee80211_channel *channel,
238 const struct ieee80211_ht_operation *ht_oper,
239 const struct ieee80211_vht_operation *vht_oper,
30eb1dc2 240 struct cfg80211_chan_def *chandef, bool verbose)
6565ec9b
JB		 241{
242 struct cfg80211_chan_def vht_chandef;
243 u32 ht_cfreq, ret;
244
245 chandef->chan = channel;
246 chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
247 chandef->center_freq1 = channel->center_freq;
248 chandef->center_freq2 = 0;
249
250 if (!ht_oper || !sband->ht_cap.ht_supported) {
251 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
252 goto out;
253 }
254
255 chandef->width = NL80211_CHAN_WIDTH_20;
256
257 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
258 channel->band);
259 /* check that channel matches the right operating channel */
260 if (channel->center_freq != ht_cfreq) {
261 /*
262 * It's possible that some APs are confused here;
263 * Netgear WNDR3700 sometimes reports 4 higher than
264 * the actual channel in association responses, but
265 * since we look at probe response/beacon data here
266 * it should be OK.
267 */
30eb1dc2
JB		 268 if (verbose)
269 sdata_info(sdata,
270 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
271 channel->center_freq, ht_cfreq,
272 ht_oper->primary_chan, channel->band);
6565ec9b
JB		 273 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
274 goto out;
275 }
276
277 /* check 40 MHz support, if we have it */
278 if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
279 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
280 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
281 chandef->width = NL80211_CHAN_WIDTH_40;
282 chandef->center_freq1 += 10;
283 break;
284 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
285 chandef->width = NL80211_CHAN_WIDTH_40;
286 chandef->center_freq1 -= 10;
287 break;
288 }
289 } else {
290 /* 40 MHz (and 80 MHz) must be supported for VHT */
291 ret = IEEE80211_STA_DISABLE_VHT;
292 goto out;
293 }
294
295 if (!vht_oper || !sband->vht_cap.vht_supported) {
296 ret = IEEE80211_STA_DISABLE_VHT;
297 goto out;
298 }
299
300 vht_chandef.chan = channel;
301 vht_chandef.center_freq1 =
302 ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx,
303 channel->band);
304 vht_chandef.center_freq2 = 0;
305
306 if (vht_oper->center_freq_seg2_idx)
307 vht_chandef.center_freq2 =
308 ieee80211_channel_to_frequency(
309 vht_oper->center_freq_seg2_idx,
310 channel->band);
311
312 switch (vht_oper->chan_width) {
313 case IEEE80211_VHT_CHANWIDTH_USE_HT:
314 vht_chandef.width = chandef->width;
315 break;
316 case IEEE80211_VHT_CHANWIDTH_80MHZ:
317 vht_chandef.width = NL80211_CHAN_WIDTH_80;
318 break;
319 case IEEE80211_VHT_CHANWIDTH_160MHZ:
320 vht_chandef.width = NL80211_CHAN_WIDTH_160;
321 break;
322 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
323 vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
324 break;
325 default:
30eb1dc2
JB		 326 if (verbose)
327 sdata_info(sdata,
328 "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
329 vht_oper->chan_width);
6565ec9b
JB		 330 ret = IEEE80211_STA_DISABLE_VHT;
331 goto out;
332 }
333
334 if (!cfg80211_chandef_valid(&vht_chandef)) {
30eb1dc2
JB		 335 if (verbose)
336 sdata_info(sdata,
337 "AP VHT information is invalid, disable VHT\n");
6565ec9b
JB		 338 ret = IEEE80211_STA_DISABLE_VHT;
339 goto out;
340 }
341
342 if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
343 ret = 0;
344 goto out;
345 }
346
347 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
30eb1dc2
JB		 348 if (verbose)
349 sdata_info(sdata,
350 "AP VHT information doesn't match HT, disable VHT\n");
6565ec9b
JB		 351 ret = IEEE80211_STA_DISABLE_VHT;
352 goto out;
353 }
354
355 *chandef = vht_chandef;
356
357 ret = 0;
358
359out:
586e01ed
JB		 360 /* don't print the message below for VHT mismatch if VHT is disabled */
361 if (ret & IEEE80211_STA_DISABLE_VHT)
362 vht_chandef = *chandef;
363
6565ec9b
JB		 364 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
365 IEEE80211_CHAN_DISABLED)) {
366 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
367 ret = IEEE80211_STA_DISABLE_HT |
368 IEEE80211_STA_DISABLE_VHT;
369 goto out;
370 }
371
372 ret |= chandef_downgrade(chandef);
373 }
374
30eb1dc2 375 if (chandef->width != vht_chandef.width && verbose)
6565ec9b
JB		 376 sdata_info(sdata,
377 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
378
379 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
380 return ret;
381}
382
30eb1dc2
JB		 383static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
384 struct sta_info *sta,
385 const struct ieee80211_ht_operation *ht_oper,
386 const struct ieee80211_vht_operation *vht_oper,
387 const u8 *bssid, u32 *changed)
d5522e03
JB		 388{
389 struct ieee80211_local *local = sdata->local;
30eb1dc2 390 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d5522e03 391 struct ieee80211_supported_band *sband;
55de908a 392 struct ieee80211_channel *chan;
30eb1dc2 393 struct cfg80211_chan_def chandef;
9ed6bcce 394 u16 ht_opmode;
30eb1dc2
JB		 395 u32 flags;
396 enum ieee80211_sta_rx_bandwidth new_sta_bw;
397 int ret;
d5522e03 398
30eb1dc2
JB		 399 /* if HT was/is disabled, don't track any bandwidth changes */
400 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
1128958d
JB		 401 return 0;
402
30eb1dc2
JB		 403 /* don't check VHT if we associated as non-VHT station */
404 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
405 vht_oper = NULL;
406
407 if (WARN_ON_ONCE(!sta))
408 return -EINVAL;
409
f2d9330e 410 chan = sdata->vif.bss_conf.chandef.chan;
55de908a 411 sband = local->hw.wiphy->bands[chan->band];
d5522e03 412
30eb1dc2
JB		 413 /* calculate new channel (type) based on HT/VHT operation IEs */
414 flags = ieee80211_determine_chantype(sdata, sband, chan, ht_oper,
415 vht_oper, &chandef, false);
416
417 /*
418 * Downgrade the new channel if we associated with restricted
419 * capabilities. For example, if we associated as a 20 MHz STA
420 * to a 40 MHz AP (due to regulatory, capabilities or config
421 * reasons) then switching to a 40 MHz channel now won't do us
422 * any good -- we couldn't use it with the AP.
423 */
424 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
425 chandef.width == NL80211_CHAN_WIDTH_80P80)
426 flags |= chandef_downgrade(&chandef);
427 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
428 chandef.width == NL80211_CHAN_WIDTH_160)
429 flags |= chandef_downgrade(&chandef);
430 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
431 chandef.width > NL80211_CHAN_WIDTH_20)
432 flags |= chandef_downgrade(&chandef);
433
434 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
435 return 0;
436
437 sdata_info(sdata,
438 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
439 ifmgd->bssid, chandef.chan->center_freq, chandef.width,
440 chandef.center_freq1, chandef.center_freq2);
441
442 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
443 IEEE80211_STA_DISABLE_VHT |
444 IEEE80211_STA_DISABLE_40MHZ |
445 IEEE80211_STA_DISABLE_80P80MHZ |
446 IEEE80211_STA_DISABLE_160MHZ)) ||
447 !cfg80211_chandef_valid(&chandef)) {
448 sdata_info(sdata,
449 "AP %pM changed bandwidth in a way we can't support - disconnect\n",
450 ifmgd->bssid);
451 return -EINVAL;
452 }
453
454 switch (chandef.width) {
455 case NL80211_CHAN_WIDTH_20_NOHT:
456 case NL80211_CHAN_WIDTH_20:
457 new_sta_bw = IEEE80211_STA_RX_BW_20;
458 break;
4bf88530 459 case NL80211_CHAN_WIDTH_40:
30eb1dc2 460 new_sta_bw = IEEE80211_STA_RX_BW_40;
64f68e5d 461 break;
30eb1dc2
JB		 462 case NL80211_CHAN_WIDTH_80:
463 new_sta_bw = IEEE80211_STA_RX_BW_80;
464 break;
465 case NL80211_CHAN_WIDTH_80P80:
466 case NL80211_CHAN_WIDTH_160:
467 new_sta_bw = IEEE80211_STA_RX_BW_160;
64f68e5d 468 break;
30eb1dc2
JB		 469 default:
470 return -EINVAL;
64f68e5d 471 }
d5522e03 472
30eb1dc2
JB		 473 if (new_sta_bw > sta->cur_max_bandwidth)
474 new_sta_bw = sta->cur_max_bandwidth;
64f68e5d 475
30eb1dc2
JB		 476 if (new_sta_bw < sta->sta.bandwidth) {
477 sta->sta.bandwidth = new_sta_bw;
478 rate_control_rate_update(local, sband, sta,
479 IEEE80211_RC_BW_CHANGED);
480 }
64f68e5d 481
30eb1dc2
JB		 482 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
483 if (ret) {
484 sdata_info(sdata,
485 "AP %pM changed bandwidth to incompatible one - disconnect\n",
486 ifmgd->bssid);
487 return ret;
488 }
7cc44ed4 489
30eb1dc2
JB		 490 if (new_sta_bw > sta->sta.bandwidth) {
491 sta->sta.bandwidth = new_sta_bw;
492 rate_control_rate_update(local, sband, sta,
493 IEEE80211_RC_BW_CHANGED);
0aaffa9b 494 }
d5522e03 495
074d46d1 496 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
d5522e03
JB		 497
498 /* if bss configuration changed store the new one */
30eb1dc2
JB		 499 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
500 *changed |= BSS_CHANGED_HT;
9ed6bcce 501 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
d5522e03
JB		 502 }
503
30eb1dc2 504 return 0;
d5522e03
JB		 505}
506
9c6bd790
JB		 507/* frame sending functions */
508
66e67e41
JB		 509static int ieee80211_compatible_rates(const u8 *supp_rates, int supp_rates_len,
510 struct ieee80211_supported_band *sband,
511 u32 *rates)
512{
513 int i, j, count;
514 *rates = 0;
515 count = 0;
516 for (i = 0; i < supp_rates_len; i++) {
517 int rate = (supp_rates[i] & 0x7F) * 5;
518
519 for (j = 0; j < sband->n_bitrates; j++)
520 if (sband->bitrates[j].bitrate == rate) {
521 *rates |= BIT(j);
522 count++;
523 break;
524 }
525 }
526
527 return count;
528}
529
530static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
9dde6423 531 struct sk_buff *skb, u8 ap_ht_param,
66e67e41
JB		 532 struct ieee80211_supported_band *sband,
533 struct ieee80211_channel *channel,
534 enum ieee80211_smps_mode smps)
535{
66e67e41
JB		 536 u8 *pos;
537 u32 flags = channel->flags;
538 u16 cap;
539 struct ieee80211_sta_ht_cap ht_cap;
540
541 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
542
66e67e41
JB		 543 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
544 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
545
66e67e41
JB		 546 /* determine capability flags */
547 cap = ht_cap.cap;
548
9dde6423 549 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
66e67e41
JB		 550 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
551 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
552 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
553 cap &= ~IEEE80211_HT_CAP_SGI_40;
554 }
555 break;
556 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
557 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
558 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
559 cap &= ~IEEE80211_HT_CAP_SGI_40;
560 }
561 break;
562 }
563
24398e39
JB		 564 /*
565 * If 40 MHz was disabled associate as though we weren't
566 * capable of 40 MHz -- some broken APs will never fall
567 * back to trying to transmit in 20 MHz.
568 */
569 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
570 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
571 cap &= ~IEEE80211_HT_CAP_SGI_40;
572 }
573
66e67e41
JB		 574 /* set SM PS mode properly */
575 cap &= ~IEEE80211_HT_CAP_SM_PS;
576 switch (smps) {
577 case IEEE80211_SMPS_AUTOMATIC:
578 case IEEE80211_SMPS_NUM_MODES:
579 WARN_ON(1);
580 case IEEE80211_SMPS_OFF:
581 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
582 IEEE80211_HT_CAP_SM_PS_SHIFT;
583 break;
584 case IEEE80211_SMPS_STATIC:
585 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
586 IEEE80211_HT_CAP_SM_PS_SHIFT;
587 break;
588 case IEEE80211_SMPS_DYNAMIC:
589 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
590 IEEE80211_HT_CAP_SM_PS_SHIFT;
591 break;
592 }
593
594 /* reserve and fill IE */
595 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
596 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
597}
598
d545daba
MP		 599static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
600 struct sk_buff *skb,
b08fbbd8
JB		 601 struct ieee80211_supported_band *sband,
602 struct ieee80211_vht_cap *ap_vht_cap)
d545daba
MP		 603{
604 u8 *pos;
605 u32 cap;
606 struct ieee80211_sta_vht_cap vht_cap;
b08fbbd8 607 int i;
d545daba
MP		 608
609 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
610
611 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
612
613 /* determine capability flags */
614 cap = vht_cap.cap;
615
f2d9d270
JB		 616 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
617 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ;
618 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
619 }
620
621 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
622 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
623 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
624 }
625
b08fbbd8
JB		 626 /*
627 * Some APs apparently get confused if our capabilities are better
628 * than theirs, so restrict what we advertise in the assoc request.
629 */
630 if (!(ap_vht_cap->vht_cap_info &
631 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
632 cap &= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE;
633
634 if (!(ap_vht_cap->vht_cap_info &
635 cpu_to_le32(IEEE80211_VHT_CAP_TXSTBC)))
636 cap &= ~(IEEE80211_VHT_CAP_RXSTBC_1 |
637 IEEE80211_VHT_CAP_RXSTBC_3 |
638 IEEE80211_VHT_CAP_RXSTBC_4);
639
640 for (i = 0; i < 8; i++) {
641 int shift = i * 2;
642 u16 mask = IEEE80211_VHT_MCS_NOT_SUPPORTED << shift;
643 u16 ap_mcs, our_mcs;
644
645 ap_mcs = (le16_to_cpu(ap_vht_cap->supp_mcs.tx_mcs_map) &
646 mask) >> shift;
647 our_mcs = (le16_to_cpu(vht_cap.vht_mcs.rx_mcs_map) &
648 mask) >> shift;
649
650 switch (ap_mcs) {
651 default:
652 if (our_mcs <= ap_mcs)
653 break;
654 /* fall through */
655 case IEEE80211_VHT_MCS_NOT_SUPPORTED:
656 vht_cap.vht_mcs.rx_mcs_map &= cpu_to_le16(~mask);
657 vht_cap.vht_mcs.rx_mcs_map |=
658 cpu_to_le16(ap_mcs << shift);
659 }
660 }
661
d545daba 662 /* reserve and fill IE */
d4950281 663 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
d545daba
MP		 664 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
665}
666
66e67e41
JB		 667static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
668{
669 struct ieee80211_local *local = sdata->local;
670 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
671 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
672 struct sk_buff *skb;
673 struct ieee80211_mgmt *mgmt;
674 u8 *pos, qos_info;
675 size_t offset = 0, noffset;
676 int i, count, rates_len, supp_rates_len;
677 u16 capab;
678 struct ieee80211_supported_band *sband;
55de908a
JB		 679 struct ieee80211_chanctx_conf *chanctx_conf;
680 struct ieee80211_channel *chan;
66e67e41 681 u32 rates = 0;
66e67e41
JB		 682
683 lockdep_assert_held(&ifmgd->mtx);
684
55de908a
JB		 685 rcu_read_lock();
686 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
687 if (WARN_ON(!chanctx_conf)) {
688 rcu_read_unlock();
689 return;
690 }
4bf88530 691 chan = chanctx_conf->def.chan;
55de908a
JB		 692 rcu_read_unlock();
693 sband = local->hw.wiphy->bands[chan->band];
66e67e41
JB		 694
695 if (assoc_data->supp_rates_len) {
696 /*
697 * Get all rates supported by the device and the AP as
698 * some APs don't like getting a superset of their rates
699 * in the association request (e.g. D-Link DAP 1353 in
700 * b-only mode)...
701 */
702 rates_len = ieee80211_compatible_rates(assoc_data->supp_rates,
703 assoc_data->supp_rates_len,
704 sband, &rates);
705 } else {
706 /*
707 * In case AP not provide any supported rates information
708 * before association, we send information element(s) with
709 * all rates that we support.
710 */
711 rates = ~0;
712 rates_len = sband->n_bitrates;
713 }
714
715 skb = alloc_skb(local->hw.extra_tx_headroom +
716 sizeof(*mgmt) + /* bit too much but doesn't matter */
717 2 + assoc_data->ssid_len + /* SSID */
718 4 + rates_len + /* (extended) rates */
719 4 + /* power capability */
720 2 + 2 * sband->n_channels + /* supported channels */
721 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
d4950281 722 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
66e67e41
JB		 723 assoc_data->ie_len + /* extra IEs */
724 9, /* WMM */
725 GFP_KERNEL);
726 if (!skb)
727 return;
728
729 skb_reserve(skb, local->hw.extra_tx_headroom);
730
731 capab = WLAN_CAPABILITY_ESS;
732
733 if (sband->band == IEEE80211_BAND_2GHZ) {
734 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
735 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
736 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
737 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
738 }
739
740 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
741 capab |= WLAN_CAPABILITY_PRIVACY;
742
743 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
744 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
745 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
746
747 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
748 memset(mgmt, 0, 24);
749 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
750 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
751 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
752
753 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
754 skb_put(skb, 10);
755 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
756 IEEE80211_STYPE_REASSOC_REQ);
757 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
758 mgmt->u.reassoc_req.listen_interval =
759 cpu_to_le16(local->hw.conf.listen_interval);
760 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
761 ETH_ALEN);
762 } else {
763 skb_put(skb, 4);
764 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
765 IEEE80211_STYPE_ASSOC_REQ);
766 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
767 mgmt->u.assoc_req.listen_interval =
768 cpu_to_le16(local->hw.conf.listen_interval);
769 }
770
771 /* SSID */
772 pos = skb_put(skb, 2 + assoc_data->ssid_len);
773 *pos++ = WLAN_EID_SSID;
774 *pos++ = assoc_data->ssid_len;
775 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
776
777 /* add all rates which were marked to be used above */
778 supp_rates_len = rates_len;
779 if (supp_rates_len > 8)
780 supp_rates_len = 8;
781
782 pos = skb_put(skb, supp_rates_len + 2);
783 *pos++ = WLAN_EID_SUPP_RATES;
784 *pos++ = supp_rates_len;
785
786 count = 0;
787 for (i = 0; i < sband->n_bitrates; i++) {
788 if (BIT(i) & rates) {
789 int rate = sband->bitrates[i].bitrate;
790 *pos++ = (u8) (rate / 5);
791 if (++count == 8)
792 break;
793 }
794 }
795
796 if (rates_len > count) {
797 pos = skb_put(skb, rates_len - count + 2);
798 *pos++ = WLAN_EID_EXT_SUPP_RATES;
799 *pos++ = rates_len - count;
800
801 for (i++; i < sband->n_bitrates; i++) {
802 if (BIT(i) & rates) {
803 int rate = sband->bitrates[i].bitrate;
804 *pos++ = (u8) (rate / 5);
805 }
806 }
807 }
808
809 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
810 /* 1. power capabilities */
811 pos = skb_put(skb, 4);
812 *pos++ = WLAN_EID_PWR_CAPABILITY;
813 *pos++ = 2;
814 *pos++ = 0; /* min tx power */
55de908a 815 *pos++ = chan->max_power; /* max tx power */
66e67e41
JB		 816
817 /* 2. supported channels */
818 /* TODO: get this in reg domain format */
819 pos = skb_put(skb, 2 * sband->n_channels + 2);
820 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
821 *pos++ = 2 * sband->n_channels;
822 for (i = 0; i < sband->n_channels; i++) {
823 *pos++ = ieee80211_frequency_to_channel(
824 sband->channels[i].center_freq);
825 *pos++ = 1; /* one channel in the subband*/
826 }
827 }
828
829 /* if present, add any custom IEs that go before HT */
830 if (assoc_data->ie_len && assoc_data->ie) {
831 static const u8 before_ht[] = {
832 WLAN_EID_SSID,
833 WLAN_EID_SUPP_RATES,
834 WLAN_EID_EXT_SUPP_RATES,
835 WLAN_EID_PWR_CAPABILITY,
836 WLAN_EID_SUPPORTED_CHANNELS,
837 WLAN_EID_RSN,
838 WLAN_EID_QOS_CAPA,
839 WLAN_EID_RRM_ENABLED_CAPABILITIES,
840 WLAN_EID_MOBILITY_DOMAIN,
841 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
842 };
843 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
844 before_ht, ARRAY_SIZE(before_ht),
845 offset);
846 pos = skb_put(skb, noffset - offset);
847 memcpy(pos, assoc_data->ie + offset, noffset - offset);
848 offset = noffset;
849 }
850
f2d9d270
JB		 851 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
852 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
853 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
854
a8243b72 855 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
9dde6423 856 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
04ecd257 857 sband, chan, sdata->smps_mode);
66e67e41 858
d545daba 859 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
b08fbbd8
JB		 860 ieee80211_add_vht_ie(sdata, skb, sband,
861 &assoc_data->ap_vht_cap);
d545daba 862
66e67e41
JB		 863 /* if present, add any custom non-vendor IEs that go after HT */
864 if (assoc_data->ie_len && assoc_data->ie) {
865 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
866 assoc_data->ie_len,
867 offset);
868 pos = skb_put(skb, noffset - offset);
869 memcpy(pos, assoc_data->ie + offset, noffset - offset);
870 offset = noffset;
871 }
872
76f0303d
JB		 873 if (assoc_data->wmm) {
874 if (assoc_data->uapsd) {
dc41e4d4
EP		 875 qos_info = ifmgd->uapsd_queues;
876 qos_info |= (ifmgd->uapsd_max_sp_len <<
66e67e41
JB		 877 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
878 } else {
879 qos_info = 0;
880 }
881
882 pos = skb_put(skb, 9);
883 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
884 *pos++ = 7; /* len */
885 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
886 *pos++ = 0x50;
887 *pos++ = 0xf2;
888 *pos++ = 2; /* WME */
889 *pos++ = 0; /* WME info */
890 *pos++ = 1; /* WME ver */
891 *pos++ = qos_info;
892 }
893
894 /* add any remaining custom (i.e. vendor specific here) IEs */
895 if (assoc_data->ie_len && assoc_data->ie) {
896 noffset = assoc_data->ie_len;
897 pos = skb_put(skb, noffset - offset);
898 memcpy(pos, assoc_data->ie + offset, noffset - offset);
899 }
900
a1845fc7
JB		 901 drv_mgd_prepare_tx(local, sdata);
902
66e67e41 903 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1672c0e3
JB		 904 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
905 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
906 IEEE80211_TX_INTFL_MLME_CONN_TX;
66e67e41
JB		 907 ieee80211_tx_skb(sdata, skb);
908}
909
572e0012
KV		 910void ieee80211_send_pspoll(struct ieee80211_local *local,
911 struct ieee80211_sub_if_data *sdata)
912{
572e0012
KV		 913 struct ieee80211_pspoll *pspoll;
914 struct sk_buff *skb;
572e0012 915
d8cd189e
KV		 916 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
917 if (!skb)
572e0012 918 return;
572e0012 919
d8cd189e
KV		 920 pspoll = (struct ieee80211_pspoll *) skb->data;
921 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
572e0012 922
62ae67be
JB		 923 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
924 ieee80211_tx_skb(sdata, skb);
572e0012
KV		 925}
926
965bedad
JB		 927void ieee80211_send_nullfunc(struct ieee80211_local *local,
928 struct ieee80211_sub_if_data *sdata,
929 int powersave)
930{
931 struct sk_buff *skb;
d8cd189e 932 struct ieee80211_hdr_3addr *nullfunc;
b6f35301 933 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
965bedad 934
d8cd189e
KV		 935 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
936 if (!skb)
965bedad 937 return;
965bedad 938
d8cd189e 939 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
965bedad 940 if (powersave)
d8cd189e 941 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
965bedad 942
6c17b77b
SF		 943 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
944 IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
b6f35301
RM		 945 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
946 IEEE80211_STA_CONNECTION_POLL))
947 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
948
62ae67be 949 ieee80211_tx_skb(sdata, skb);
965bedad
JB		 950}
951
d524215f
FF		 952static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
953 struct ieee80211_sub_if_data *sdata)
954{
955 struct sk_buff *skb;
956 struct ieee80211_hdr *nullfunc;
957 __le16 fc;
958
959 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
960 return;
961
962 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
d15b8459 963 if (!skb)
d524215f 964 return;
d15b8459 965
d524215f
FF		 966 skb_reserve(skb, local->hw.extra_tx_headroom);
967
968 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
969 memset(nullfunc, 0, 30);
970 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
971 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
972 nullfunc->frame_control = fc;
973 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
974 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
975 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
976 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
977
978 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
979 ieee80211_tx_skb(sdata, skb);
980}
981
cc32abd4
JB		 982/* spectrum management related things */
983static void ieee80211_chswitch_work(struct work_struct *work)
984{
985 struct ieee80211_sub_if_data *sdata =
986 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
cc32abd4
JB		 987 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
988
9607e6b6 989 if (!ieee80211_sdata_running(sdata))
cc32abd4
JB		 990 return;
991
77fdaa12
JB		 992 mutex_lock(&ifmgd->mtx);
993 if (!ifmgd->associated)
994 goto out;
cc32abd4 995
55de908a 996 sdata->local->_oper_channel = sdata->local->csa_channel;
5ce6e438
JB		 997 if (!sdata->local->ops->channel_switch) {
998 /* call "hw_config" only if doing sw channel switch */
999 ieee80211_hw_config(sdata->local,
1000 IEEE80211_CONF_CHANGE_CHANNEL);
1ea57b1f
SL		 1001 } else {
1002 /* update the device channel directly */
55de908a 1003 sdata->local->hw.conf.channel = sdata->local->_oper_channel;
5ce6e438 1004 }
77fdaa12 1005
cc32abd4 1006 /* XXX: shouldn't really modify cfg80211-owned data! */
55de908a 1007 ifmgd->associated->channel = sdata->local->_oper_channel;
cc32abd4 1008
57eebdf3 1009 /* XXX: wait for a beacon first? */
cc32abd4
JB		 1010 ieee80211_wake_queues_by_reason(&sdata->local->hw,
1011 IEEE80211_QUEUE_STOP_REASON_CSA);
77fdaa12
JB		 1012 out:
1013 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
1014 mutex_unlock(&ifmgd->mtx);
cc32abd4
JB		 1015}
1016
5ce6e438
JB		 1017void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1018{
55de908a
JB		 1019 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1020 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5ce6e438
JB		 1021
1022 trace_api_chswitch_done(sdata, success);
1023 if (!success) {
882a7c69
JB		 1024 sdata_info(sdata,
1025 "driver channel switch failed, disconnecting\n");
1026 ieee80211_queue_work(&sdata->local->hw,
1027 &ifmgd->csa_connection_drop_work);
1028 } else {
1029 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
5ce6e438 1030 }
5ce6e438
JB		 1031}
1032EXPORT_SYMBOL(ieee80211_chswitch_done);
1033
cc32abd4
JB		 1034static void ieee80211_chswitch_timer(unsigned long data)
1035{
1036 struct ieee80211_sub_if_data *sdata =
1037 (struct ieee80211_sub_if_data *) data;
1038 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1039
5bb644a0
JB		 1040 if (sdata->local->quiescing) {
1041 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
1042 return;
1043 }
1044
42935eca 1045 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4
JB		 1046}
1047
4a3cb702
JB		 1048void
1049ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1050 const struct ieee80211_channel_sw_ie *sw_elem,
1051 struct ieee80211_bss *bss, u64 timestamp)
cc32abd4 1052{
0c1ad2ca
JB		 1053 struct cfg80211_bss *cbss =
1054 container_of((void *)bss, struct cfg80211_bss, priv);
cc32abd4
JB		 1055 struct ieee80211_channel *new_ch;
1056 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
59eb21a6
BR		 1057 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num,
1058 cbss->channel->band);
55de908a 1059 struct ieee80211_chanctx *chanctx;
cc32abd4 1060
77fdaa12
JB		 1061 ASSERT_MGD_MTX(ifmgd);
1062
1063 if (!ifmgd->associated)
cc32abd4
JB		 1064 return;
1065
fbe9c429 1066 if (sdata->local->scanning)
cc32abd4
JB		 1067 return;
1068
1069 /* Disregard subsequent beacons if we are already running a timer
1070 processing a CSA */
1071
1072 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
1073 return;
1074
1075 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
882a7c69
JB		 1076 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED) {
1077 sdata_info(sdata,
1078 "AP %pM switches to unsupported channel (%d MHz), disconnecting\n",
1079 ifmgd->associated->bssid, new_freq);
1080 ieee80211_queue_work(&sdata->local->hw,
1081 &ifmgd->csa_connection_drop_work);
cc32abd4 1082 return;
882a7c69 1083 }
cc32abd4 1084
57eebdf3
JB		 1085 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
1086
55de908a
JB		 1087 if (sdata->local->use_chanctx) {
1088 sdata_info(sdata,
1089 "not handling channel switch with channel contexts\n");
1090 ieee80211_queue_work(&sdata->local->hw,
1091 &ifmgd->csa_connection_drop_work);
246dc3fd 1092 return;
55de908a
JB		 1093 }
1094
1095 mutex_lock(&sdata->local->chanctx_mtx);
1096 if (WARN_ON(!rcu_access_pointer(sdata->vif.chanctx_conf))) {
1097 mutex_unlock(&sdata->local->chanctx_mtx);
1098 return;
1099 }
1100 chanctx = container_of(rcu_access_pointer(sdata->vif.chanctx_conf),
1101 struct ieee80211_chanctx, conf);
1102 if (chanctx->refcount > 1) {
1103 sdata_info(sdata,
1104 "channel switch with multiple interfaces on the same channel, disconnecting\n");
1105 ieee80211_queue_work(&sdata->local->hw,
1106 &ifmgd->csa_connection_drop_work);
1107 mutex_unlock(&sdata->local->chanctx_mtx);
1108 return;
1109 }
1110 mutex_unlock(&sdata->local->chanctx_mtx);
1111
1112 sdata->local->csa_channel = new_ch;
1113
57eebdf3
JB		 1114 if (sw_elem->mode)
1115 ieee80211_stop_queues_by_reason(&sdata->local->hw,
1116 IEEE80211_QUEUE_STOP_REASON_CSA);
1117
5ce6e438
JB		 1118 if (sdata->local->ops->channel_switch) {
1119 /* use driver's channel switch callback */
57eebdf3
JB		 1120 struct ieee80211_channel_switch ch_switch = {
1121 .timestamp = timestamp,
1122 .block_tx = sw_elem->mode,
1123 .channel = new_ch,
1124 .count = sw_elem->count,
1125 };
1126
5ce6e438
JB		 1127 drv_channel_switch(sdata->local, &ch_switch);
1128 return;
1129 }
1130
1131 /* channel switch handled in software */
57eebdf3 1132 if (sw_elem->count <= 1)
42935eca 1133 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
57eebdf3 1134 else
cc32abd4 1135 mod_timer(&ifmgd->chswitch_timer,
3049000b
JB		 1136 TU_TO_EXP_TIME(sw_elem->count *
1137 cbss->beacon_interval));
cc32abd4
JB		 1138}
1139
1ea6f9c0
JB		 1140static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1141 struct ieee80211_channel *channel,
1142 const u8 *country_ie, u8 country_ie_len,
1143 const u8 *pwr_constr_elem)
cc32abd4 1144{
04b7b2ff
JB		 1145 struct ieee80211_country_ie_triplet *triplet;
1146 int chan = ieee80211_frequency_to_channel(channel->center_freq);
1147 int i, chan_pwr, chan_increment, new_ap_level;
1148 bool have_chan_pwr = false;
cc32abd4 1149
04b7b2ff
JB		 1150 /* Invalid IE */
1151 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1ea6f9c0 1152 return 0;
cc32abd4 1153
04b7b2ff
JB		 1154 triplet = (void *)(country_ie + 3);
1155 country_ie_len -= 3;
1156
1157 switch (channel->band) {
1158 default:
1159 WARN_ON_ONCE(1);
1160 /* fall through */
1161 case IEEE80211_BAND_2GHZ:
1162 case IEEE80211_BAND_60GHZ:
1163 chan_increment = 1;
1164 break;
1165 case IEEE80211_BAND_5GHZ:
1166 chan_increment = 4;
1167 break;
cc32abd4 1168 }
04b7b2ff
JB		 1169
1170 /* find channel */
1171 while (country_ie_len >= 3) {
1172 u8 first_channel = triplet->chans.first_channel;
1173
1174 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1175 goto next;
1176
1177 for (i = 0; i < triplet->chans.num_channels; i++) {
1178 if (first_channel + i * chan_increment == chan) {
1179 have_chan_pwr = true;
1180 chan_pwr = triplet->chans.max_power;
1181 break;
1182 }
1183 }
1184 if (have_chan_pwr)
1185 break;
1186
1187 next:
1188 triplet++;
1189 country_ie_len -= 3;
1190 }
1191
1192 if (!have_chan_pwr)
1ea6f9c0 1193 return 0;
04b7b2ff
JB		 1194
1195 new_ap_level = max_t(int, 0, chan_pwr - *pwr_constr_elem);
1196
1ea6f9c0
JB		 1197 if (sdata->ap_power_level == new_ap_level)
1198 return 0;
04b7b2ff
JB		 1199
1200 sdata_info(sdata,
1201 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1202 new_ap_level, chan_pwr, *pwr_constr_elem,
1203 sdata->u.mgd.bssid);
1ea6f9c0
JB		 1204 sdata->ap_power_level = new_ap_level;
1205 if (__ieee80211_recalc_txpower(sdata))
1206 return BSS_CHANGED_TXPOWER;
1207 return 0;
cc32abd4
JB		 1208}
1209
965bedad
JB		 1210/* powersave */
1211static void ieee80211_enable_ps(struct ieee80211_local *local,
1212 struct ieee80211_sub_if_data *sdata)
1213{
1214 struct ieee80211_conf *conf = &local->hw.conf;
1215
d5edaedc
JB		 1216 /*
1217 * If we are scanning right now then the parameters will
1218 * take effect when scan finishes.
1219 */
fbe9c429 1220 if (local->scanning)
d5edaedc
JB		 1221 return;
1222
965bedad
JB		 1223 if (conf->dynamic_ps_timeout > 0 &&
1224 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
1225 mod_timer(&local->dynamic_ps_timer, jiffies +
1226 msecs_to_jiffies(conf->dynamic_ps_timeout));
1227 } else {
1228 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1229 ieee80211_send_nullfunc(local, sdata, 1);
375177bf 1230
2a13052f
JO		 1231 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1232 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
1233 return;
1234
1235 conf->flags |= IEEE80211_CONF_PS;
1236 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965bedad
JB		 1237 }
1238}
1239
1240static void ieee80211_change_ps(struct ieee80211_local *local)
1241{
1242 struct ieee80211_conf *conf = &local->hw.conf;
1243
1244 if (local->ps_sdata) {
965bedad
JB		 1245 ieee80211_enable_ps(local, local->ps_sdata);
1246 } else if (conf->flags & IEEE80211_CONF_PS) {
1247 conf->flags &= ~IEEE80211_CONF_PS;
1248 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1249 del_timer_sync(&local->dynamic_ps_timer);
1250 cancel_work_sync(&local->dynamic_ps_enable_work);
1251 }
1252}
1253
808118cb
JY		 1254static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1255{
1256 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1257 struct sta_info *sta = NULL;
c2c98fde 1258 bool authorized = false;
808118cb
JY		 1259
1260 if (!mgd->powersave)
1261 return false;
1262
05cb9108
JB		 1263 if (mgd->broken_ap)
1264 return false;
1265
808118cb
JY		 1266 if (!mgd->associated)
1267 return false;
1268
808118cb
JY		 1269 if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
1270 IEEE80211_STA_CONNECTION_POLL))
1271 return false;
1272
1273 rcu_read_lock();
1274 sta = sta_info_get(sdata, mgd->bssid);
1275 if (sta)
c2c98fde 1276 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
808118cb
JY		 1277 rcu_read_unlock();
1278
c2c98fde 1279 return authorized;
808118cb
JY		 1280}
1281
965bedad 1282/* need to hold RTNL or interface lock */
10f644a4 1283void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 1284{
1285 struct ieee80211_sub_if_data *sdata, *found = NULL;
1286 int count = 0;
195e294d 1287 int timeout;
965bedad
JB		 1288
1289 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
1290 local->ps_sdata = NULL;
1291 return;
1292 }
1293
1294 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 1295 if (!ieee80211_sdata_running(sdata))
965bedad 1296 continue;
8c7914de
RM		 1297 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1298 /* If an AP vif is found, then disable PS
1299 * by setting the count to zero thereby setting
1300 * ps_sdata to NULL.
1301 */
1302 count = 0;
1303 break;
1304 }
965bedad
JB		 1305 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1306 continue;
1307 found = sdata;
1308 count++;
1309 }
1310
808118cb 1311 if (count == 1 && ieee80211_powersave_allowed(found)) {
10f644a4
JB		 1312 s32 beaconint_us;
1313
1314 if (latency < 0)
ed77134b 1315 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
10f644a4
JB		 1316
1317 beaconint_us = ieee80211_tu_to_usec(
1318 found->vif.bss_conf.beacon_int);
1319
ff616381 1320 timeout = local->dynamic_ps_forced_timeout;
195e294d
JO		 1321 if (timeout < 0) {
1322 /*
ff616381
JO		 1323 * Go to full PSM if the user configures a very low
1324 * latency requirement.
0ab82b04
EP		 1325 * The 2000 second value is there for compatibility
1326 * until the PM_QOS_NETWORK_LATENCY is configured
1327 * with real values.
195e294d 1328 */
0ab82b04
EP		 1329 if (latency > (1900 * USEC_PER_MSEC) &&
1330 latency != (2000 * USEC_PER_SEC))
195e294d 1331 timeout = 0;
ff616381
JO		 1332 else
1333 timeout = 100;
195e294d 1334 }
09b85568 1335 local->hw.conf.dynamic_ps_timeout = timeout;
195e294d 1336
04fe2037 1337 if (beaconint_us > latency) {
10f644a4 1338 local->ps_sdata = NULL;
04fe2037 1339 } else {
04fe2037 1340 int maxslp = 1;
826262c3 1341 u8 dtimper = found->u.mgd.dtim_period;
56007a02
JB		 1342
1343 /* If the TIM IE is invalid, pretend the value is 1 */
1344 if (!dtimper)
1345 dtimper = 1;
1346 else if (dtimper > 1)
04fe2037
JB		 1347 maxslp = min_t(int, dtimper,
1348 latency / beaconint_us);
1349
9ccebe61 1350 local->hw.conf.max_sleep_period = maxslp;
56007a02 1351 local->hw.conf.ps_dtim_period = dtimper;
10f644a4 1352 local->ps_sdata = found;
04fe2037 1353 }
10f644a4 1354 } else {
965bedad 1355 local->ps_sdata = NULL;
10f644a4 1356 }
965bedad
JB		 1357
1358 ieee80211_change_ps(local);
1359}
1360
ab095877
EP		 1361void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1362{
1363 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1364
1365 if (sdata->vif.bss_conf.ps != ps_allowed) {
1366 sdata->vif.bss_conf.ps = ps_allowed;
1367 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1368 }
1369}
1370
965bedad
JB		 1371void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1372{
1373 struct ieee80211_local *local =
1374 container_of(work, struct ieee80211_local,
1375 dynamic_ps_disable_work);
1376
1377 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1378 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1379 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1380 }
1381
1382 ieee80211_wake_queues_by_reason(&local->hw,
1383 IEEE80211_QUEUE_STOP_REASON_PS);
1384}
1385
1386void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1387{
1388 struct ieee80211_local *local =
1389 container_of(work, struct ieee80211_local,
1390 dynamic_ps_enable_work);
1391 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
5e34069c 1392 struct ieee80211_if_managed *ifmgd;
1ddc2867
RM		 1393 unsigned long flags;
1394 int q;
965bedad
JB		 1395
1396 /* can only happen when PS was just disabled anyway */
1397 if (!sdata)
1398 return;
1399
5e34069c
CL		 1400 ifmgd = &sdata->u.mgd;
1401
965bedad
JB		 1402 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1403 return;
1404
09b85568 1405 if (local->hw.conf.dynamic_ps_timeout > 0) {
77b7023a
AN		 1406 /* don't enter PS if TX frames are pending */
1407 if (drv_tx_frames_pending(local)) {
1ddc2867
RM		 1408 mod_timer(&local->dynamic_ps_timer, jiffies +
1409 msecs_to_jiffies(
1410 local->hw.conf.dynamic_ps_timeout));
1411 return;
1412 }
77b7023a
AN		 1413
1414 /*
1415 * transmission can be stopped by others which leads to
1416 * dynamic_ps_timer expiry. Postpone the ps timer if it
1417 * is not the actual idle state.
1418 */
1419 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1420 for (q = 0; q < local->hw.queues; q++) {
1421 if (local->queue_stop_reasons[q]) {
1422 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1423 flags);
1424 mod_timer(&local->dynamic_ps_timer, jiffies +
1425 msecs_to_jiffies(
1426 local->hw.conf.dynamic_ps_timeout));
1427 return;
1428 }
1429 }
1430 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1ddc2867 1431 }
1ddc2867 1432
375177bf 1433 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
9c38a8b4 1434 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
f3e85b9e 1435 netif_tx_stop_all_queues(sdata->dev);
965bedad 1436
e8306f98
VN		 1437 if (drv_tx_frames_pending(local))
1438 mod_timer(&local->dynamic_ps_timer, jiffies +
1439 msecs_to_jiffies(
1440 local->hw.conf.dynamic_ps_timeout));
1441 else {
1442 ieee80211_send_nullfunc(local, sdata, 1);
1443 /* Flush to get the tx status of nullfunc frame */
1444 drv_flush(local, false);
1445 }
f3e85b9e
VN		 1446 }
1447
2a13052f
JO		 1448 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1449 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
375177bf
VN		 1450 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1451 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1452 local->hw.conf.flags |= IEEE80211_CONF_PS;
1453 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1454 }
f3e85b9e 1455
77b7023a
AN		 1456 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1457 netif_tx_wake_all_queues(sdata->dev);
965bedad
JB		 1458}
1459
1460void ieee80211_dynamic_ps_timer(unsigned long data)
1461{
1462 struct ieee80211_local *local = (void *) data;
1463
78f1a8b7 1464 if (local->quiescing || local->suspended)
5bb644a0
JB		 1465 return;
1466
42935eca 1467 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 1468}
1469
164eb02d
SW		 1470void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1471{
1472 struct delayed_work *delayed_work =
1473 container_of(work, struct delayed_work, work);
1474 struct ieee80211_sub_if_data *sdata =
1475 container_of(delayed_work, struct ieee80211_sub_if_data,
1476 dfs_cac_timer_work);
1477
1478 ieee80211_vif_release_channel(sdata);
1479
1480 cfg80211_cac_event(sdata->dev, NL80211_RADAR_CAC_FINISHED, GFP_KERNEL);
1481}
1482
60f8b39c 1483/* MLME */
7d25745d 1484static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
4ced3f74 1485 struct ieee80211_sub_if_data *sdata,
4a3cb702 1486 const u8 *wmm_param, size_t wmm_param_len)
f0706e82 1487{
f0706e82 1488 struct ieee80211_tx_queue_params params;
4ced3f74 1489 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1490 size_t left;
1491 int count;
4a3cb702
JB		 1492 const u8 *pos;
1493 u8 uapsd_queues = 0;
f0706e82 1494
e1b3ec1a 1495 if (!local->ops->conf_tx)
7d25745d 1496 return false;
e1b3ec1a 1497
32c5057b 1498 if (local->hw.queues < IEEE80211_NUM_ACS)
7d25745d 1499 return false;
3434fbd3
JB		 1500
1501 if (!wmm_param)
7d25745d 1502 return false;
3434fbd3 1503
f0706e82 1504 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
7d25745d 1505 return false;
ab13315a
KV		 1506
1507 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
dc41e4d4 1508 uapsd_queues = ifmgd->uapsd_queues;
ab13315a 1509
f0706e82 1510 count = wmm_param[6] & 0x0f;
46900298 1511 if (count == ifmgd->wmm_last_param_set)
7d25745d 1512 return false;
46900298 1513 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 1514
1515 pos = wmm_param + 8;
1516 left = wmm_param_len - 8;
1517
1518 memset(&params, 0, sizeof(params));
1519
00e96dec 1520 sdata->wmm_acm = 0;
f0706e82
JB		 1521 for (; left >= 4; left -= 4, pos += 4) {
1522 int aci = (pos[0] >> 5) & 0x03;
1523 int acm = (pos[0] >> 4) & 0x01;
ab13315a 1524 bool uapsd = false;
f0706e82
JB		 1525 int queue;
1526
1527 switch (aci) {
0eeb59fe 1528 case 1: /* AC_BK */
e100bb64 1529 queue = 3;
988c0f72 1530 if (acm)
00e96dec 1531 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV		 1532 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1533 uapsd = true;
f0706e82 1534 break;
0eeb59fe 1535 case 2: /* AC_VI */
e100bb64 1536 queue = 1;
988c0f72 1537 if (acm)
00e96dec 1538 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV		 1539 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1540 uapsd = true;
f0706e82 1541 break;
0eeb59fe 1542 case 3: /* AC_VO */
e100bb64 1543 queue = 0;
988c0f72 1544 if (acm)
00e96dec 1545 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV		 1546 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1547 uapsd = true;
f0706e82 1548 break;
0eeb59fe 1549 case 0: /* AC_BE */
f0706e82 1550 default:
e100bb64 1551 queue = 2;
988c0f72 1552 if (acm)
00e96dec 1553 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV		 1554 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1555 uapsd = true;
f0706e82
JB		 1556 break;
1557 }
1558
1559 params.aifs = pos[0] & 0x0f;
1560 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1561 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 1562 params.txop = get_unaligned_le16(pos + 2);
ab13315a
KV		 1563 params.uapsd = uapsd;
1564
bdcbd8e0
JB		 1565 mlme_dbg(sdata,
1566 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1567 queue, aci, acm,
1568 params.aifs, params.cw_min, params.cw_max,
1569 params.txop, params.uapsd);
f6f3def3
EP		 1570 sdata->tx_conf[queue] = params;
1571 if (drv_conf_tx(local, sdata, queue, &params))
bdcbd8e0
JB		 1572 sdata_err(sdata,
1573 "failed to set TX queue parameters for queue %d\n",
1574 queue);
f0706e82 1575 }
e1b3ec1a
SG		 1576
1577 /* enable WMM or activate new settings */
4ced3f74 1578 sdata->vif.bss_conf.qos = true;
7d25745d 1579 return true;
f0706e82
JB		 1580}
1581
925e64c3
SG		 1582static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1583{
1584 lockdep_assert_held(&sdata->local->mtx);
1585
1586 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1587 IEEE80211_STA_BEACON_POLL);
1588 ieee80211_run_deferred_scan(sdata->local);
1589}
1590
1591static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1592{
1593 mutex_lock(&sdata->local->mtx);
1594 __ieee80211_stop_poll(sdata);
1595 mutex_unlock(&sdata->local->mtx);
1596}
1597
7a5158ef
JB		 1598static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1599 u16 capab, bool erp_valid, u8 erp)
5628221c 1600{
bda3933a 1601 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 1602 u32 changed = 0;
7a5158ef
JB		 1603 bool use_protection;
1604 bool use_short_preamble;
1605 bool use_short_slot;
1606
1607 if (erp_valid) {
1608 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1609 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1610 } else {
1611 use_protection = false;
1612 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1613 }
1614
1615 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
55de908a 1616 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
43d35343 1617 use_short_slot = true;
5628221c 1618
471b3efd 1619 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 1620 bss_conf->use_cts_prot = use_protection;
1621 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 1622 }
7e9ed188 1623
d43c7b37 1624 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 1625 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 1626 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 1627 }
d9430a32 1628
7a5158ef 1629 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 1630 bss_conf->use_short_slot = use_short_slot;
1631 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 1632 }
1633
1634 return changed;
1635}
1636
f698d856 1637static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 1638 struct cfg80211_bss *cbss,
ae5eb026 1639 u32 bss_info_changed)
f0706e82 1640{
0c1ad2ca 1641 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 1642 struct ieee80211_local *local = sdata->local;
68542962 1643 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
d6f2da5b 1644
ae5eb026 1645 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 1646 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
50ae34a2 1647 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 1648
7ccc8bd7
FF		 1649 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1650 IEEE80211_BEACON_LOSS_COUNT * bss_conf->beacon_int));
1651
0c1ad2ca
JB		 1652 sdata->u.mgd.associated = cbss;
1653 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 1654
17e4ec14
JM		 1655 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1656
488dd7b5 1657 if (sdata->vif.p2p) {
9caf0364 1658 const struct cfg80211_bss_ies *ies;
488dd7b5 1659
9caf0364
JB		 1660 rcu_read_lock();
1661 ies = rcu_dereference(cbss->ies);
1662 if (ies) {
1663 u8 noa[2];
1664 int ret;
1665
1666 ret = cfg80211_get_p2p_attr(
1667 ies->data, ies->len,
1668 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1669 noa, sizeof(noa));
1670 if (ret >= 2) {
1671 bss_conf->p2p_oppps = noa[1] & 0x80;
1672 bss_conf->p2p_ctwindow = noa[1] & 0x7f;
1673 bss_info_changed |= BSS_CHANGED_P2P_PS;
1674 sdata->u.mgd.p2p_noa_index = noa[0];
1675 }
488dd7b5 1676 }
9caf0364 1677 rcu_read_unlock();
488dd7b5
JB		 1678 }
1679
b291ba11 1680 /* just to be sure */
925e64c3 1681 ieee80211_stop_poll(sdata);
b291ba11 1682
9ac19a90 1683 ieee80211_led_assoc(local, 1);
9306102e 1684
c65dd147 1685 if (sdata->u.mgd.assoc_data->have_beacon) {
826262c3
JB		 1686 /*
1687 * If the AP is buggy we may get here with no DTIM period
1688 * known, so assume it's 1 which is the only safe assumption
1689 * in that case, although if the TIM IE is broken powersave
1690 * probably just won't work at all.
1691 */
1692 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
c65dd147 1693 bss_info_changed |= BSS_CHANGED_DTIM_PERIOD;
826262c3 1694 } else {
e5b900d2 1695 bss_conf->dtim_period = 0;
826262c3 1696 }
e5b900d2 1697
68542962 1698 bss_conf->assoc = 1;
9cef8737 1699
a97c13c3 1700 /* Tell the driver to monitor connection quality (if supported) */
ea086359 1701 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
68542962 1702 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 1703 bss_info_changed |= BSS_CHANGED_CQM;
1704
68542962 1705 /* Enable ARP filtering */
0f19b41e 1706 if (bss_conf->arp_addr_cnt)
68542962 1707 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
68542962 1708
ae5eb026 1709 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 1710
056508dc
JB		 1711 mutex_lock(&local->iflist_mtx);
1712 ieee80211_recalc_ps(local, -1);
1713 mutex_unlock(&local->iflist_mtx);
e0cb686f 1714
04ecd257 1715 ieee80211_recalc_smps(sdata);
ab095877
EP		 1716 ieee80211_recalc_ps_vif(sdata);
1717
8a5b33f5 1718 netif_tx_start_all_queues(sdata->dev);
9ac19a90 1719 netif_carrier_on(sdata->dev);
f0706e82
JB		 1720}
1721
e69e95db 1722static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
37ad3888
JB		 1723 u16 stype, u16 reason, bool tx,
1724 u8 *frame_buf)
aa458d17 1725{
46900298 1726 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17 1727 struct ieee80211_local *local = sdata->local;
3cc5240b 1728 u32 changed = 0;
aa458d17 1729
77fdaa12
JB		 1730 ASSERT_MGD_MTX(ifmgd);
1731
37ad3888
JB		 1732 if (WARN_ON_ONCE(tx && !frame_buf))
1733 return;
1734
b291ba11
JB		 1735 if (WARN_ON(!ifmgd->associated))
1736 return;
1737
79543d8e
DS		 1738 ieee80211_stop_poll(sdata);
1739
77fdaa12 1740 ifmgd->associated = NULL;
77fdaa12
JB		 1741
1742 /*
1743 * we need to commit the associated = NULL change because the
1744 * scan code uses that to determine whether this iface should
1745 * go to/wake up from powersave or not -- and could otherwise
1746 * wake the queues erroneously.
1747 */
1748 smp_mb();
1749
1750 /*
1751 * Thus, we can only afterwards stop the queues -- to account
1752 * for the case where another CPU is finishing a scan at this
1753 * time -- we don't want the scan code to enable queues.
1754 */
aa458d17 1755
8a5b33f5 1756 netif_tx_stop_all_queues(sdata->dev);
aa458d17
TW		 1757 netif_carrier_off(sdata->dev);
1758
88bc40e8
EP		 1759 /*
1760 * if we want to get out of ps before disassoc (why?) we have
1761 * to do it before sending disassoc, as otherwise the null-packet
1762 * won't be valid.
1763 */
1764 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1765 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1766 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1767 }
1768 local->ps_sdata = NULL;
1769
ab095877
EP		 1770 /* disable per-vif ps */
1771 ieee80211_recalc_ps_vif(sdata);
1772
f823981e
EP		 1773 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1774 if (tx)
1775 drv_flush(local, false);
1776
37ad3888
JB		 1777 /* deauthenticate/disassociate now */
1778 if (tx || frame_buf)
88a9e31c
EP		 1779 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
1780 reason, tx, frame_buf);
37ad3888
JB		 1781
1782 /* flush out frame */
1783 if (tx)
1784 drv_flush(local, false);
1785
88a9e31c
EP		 1786 /* clear bssid only after building the needed mgmt frames */
1787 memset(ifmgd->bssid, 0, ETH_ALEN);
1788
37ad3888 1789 /* remove AP and TDLS peers */
051007d9 1790 sta_info_flush_defer(sdata);
37ad3888
JB		 1791
1792 /* finally reset all BSS / config parameters */
f5e5bf25
TW		 1793 changed |= ieee80211_reset_erp_info(sdata);
1794
f5e5bf25 1795 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 1796 changed |= BSS_CHANGED_ASSOC;
1797 sdata->vif.bss_conf.assoc = false;
f5e5bf25 1798
488dd7b5
JB		 1799 sdata->vif.bss_conf.p2p_ctwindow = 0;
1800 sdata->vif.bss_conf.p2p_oppps = false;
1801
413ad50a 1802 /* on the next assoc, re-program HT parameters */
ef96a842
BG		 1803 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1804 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
413ad50a 1805
1ea6f9c0 1806 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
a8302de9 1807
520eb820
KV		 1808 del_timer_sync(&local->dynamic_ps_timer);
1809 cancel_work_sync(&local->dynamic_ps_enable_work);
1810
68542962 1811 /* Disable ARP filtering */
0f19b41e 1812 if (sdata->vif.bss_conf.arp_addr_cnt)
68542962 1813 changed |= BSS_CHANGED_ARP_FILTER;
68542962 1814
3abead59
JB		 1815 sdata->vif.bss_conf.qos = false;
1816 changed |= BSS_CHANGED_QOS;
1817
0aaffa9b
JB		 1818 /* The BSSID (not really interesting) and HT changed */
1819 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 1820 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 1821
3abead59
JB		 1822 /* disassociated - set to defaults now */
1823 ieee80211_set_wmm_default(sdata, false);
1824
b9dcf712
JB		 1825 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1826 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1827 del_timer_sync(&sdata->u.mgd.timer);
1828 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2d9957cc
JB		 1829
1830 sdata->u.mgd.timers_running = 0;
028e8da0 1831
826262c3
JB		 1832 sdata->vif.bss_conf.dtim_period = 0;
1833
028e8da0
JB		 1834 ifmgd->flags = 0;
1835 ieee80211_vif_release_channel(sdata);
aa458d17 1836}
f0706e82 1837
3cf335d5
KV		 1838void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1839 struct ieee80211_hdr *hdr)
1840{
1841 /*
1842 * We can postpone the mgd.timer whenever receiving unicast frames
1843 * from AP because we know that the connection is working both ways
1844 * at that time. But multicast frames (and hence also beacons) must
1845 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 1846 * data idle periods for sending the periodic probe request to the
1847 * AP we're connected to.
3cf335d5 1848 */
b291ba11
JB		 1849 if (is_multicast_ether_addr(hdr->addr1))
1850 return;
1851
be099e82 1852 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 1853}
f0706e82 1854
4e5ff376
FF		 1855static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1856{
1857 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
133d40f9 1858 struct ieee80211_local *local = sdata->local;
4e5ff376 1859
133d40f9 1860 mutex_lock(&local->mtx);
4e5ff376 1861 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
133d40f9
SG		 1862 IEEE80211_STA_CONNECTION_POLL))) {
1863 mutex_unlock(&local->mtx);
1864 return;
1865 }
4e5ff376 1866
925e64c3 1867 __ieee80211_stop_poll(sdata);
133d40f9
SG		 1868
1869 mutex_lock(&local->iflist_mtx);
1870 ieee80211_recalc_ps(local, -1);
1871 mutex_unlock(&local->iflist_mtx);
4e5ff376
FF		 1872
1873 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
133d40f9 1874 goto out;
4e5ff376
FF		 1875
1876 /*
1877 * We've received a probe response, but are not sure whether
1878 * we have or will be receiving any beacons or data, so let's
1879 * schedule the timers again, just in case.
1880 */
1881 ieee80211_sta_reset_beacon_monitor(sdata);
1882
1883 mod_timer(&ifmgd->conn_mon_timer,
1884 round_jiffies_up(jiffies +
1885 IEEE80211_CONNECTION_IDLE_TIME));
133d40f9 1886out:
133d40f9 1887 mutex_unlock(&local->mtx);
4e5ff376
FF		 1888}
1889
1890void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
04ac3c0e 1891 struct ieee80211_hdr *hdr, bool ack)
4e5ff376 1892{
75706d0e 1893 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF		 1894 return;
1895
4e5ff376
FF		 1896 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1897 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e 1898 if (ack)
cab1c7fd 1899 ieee80211_sta_reset_conn_monitor(sdata);
04ac3c0e
FF		 1900 else
1901 sdata->u.mgd.nullfunc_failed = true;
4e5ff376 1902 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
cab1c7fd 1903 return;
4e5ff376 1904 }
cab1c7fd
WD		 1905
1906 if (ack)
1907 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF		 1908}
1909
a43abf29
ML		 1910static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1911{
1912 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1913 const u8 *ssid;
f01a067d 1914 u8 *dst = ifmgd->associated->bssid;
180205bd 1915 u8 unicast_limit = max(1, max_probe_tries - 3);
f01a067d
LR		 1916
1917 /*
1918 * Try sending broadcast probe requests for the last three
1919 * probe requests after the first ones failed since some
1920 * buggy APs only support broadcast probe requests.
1921 */
1922 if (ifmgd->probe_send_count >= unicast_limit)
1923 dst = NULL;
a43abf29 1924
4e5ff376
FF		 1925 /*
1926 * When the hardware reports an accurate Tx ACK status, it's
1927 * better to send a nullfunc frame instead of a probe request,
1928 * as it will kick us off the AP quickly if we aren't associated
1929 * anymore. The timeout will be reset if the frame is ACKed by
1930 * the AP.
1931 */
992e68bf
SD		 1932 ifmgd->probe_send_count++;
1933
04ac3c0e
FF		 1934 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1935 ifmgd->nullfunc_failed = false;
4e5ff376 1936 ieee80211_send_nullfunc(sdata->local, sdata, 0);
04ac3c0e 1937 } else {
88c868c4
SG		 1938 int ssid_len;
1939
9caf0364 1940 rcu_read_lock();
4e5ff376 1941 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
88c868c4
SG		 1942 if (WARN_ON_ONCE(ssid == NULL))
1943 ssid_len = 0;
1944 else
1945 ssid_len = ssid[1];
1946
1947 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
1672c0e3 1948 0, (u32) -1, true, 0,
55de908a 1949 ifmgd->associated->channel, false);
9caf0364 1950 rcu_read_unlock();
4e5ff376 1951 }
a43abf29 1952
180205bd 1953 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
a43abf29 1954 run_again(ifmgd, ifmgd->probe_timeout);
f69b9c79
RM		 1955 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
1956 drv_flush(sdata->local, false);
a43abf29
ML		 1957}
1958
b291ba11
JB		 1959static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1960 bool beacon)
04de8381 1961{
04de8381 1962 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 1963 bool already = false;
34bfc411 1964
9607e6b6 1965 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 1966 return;
1967
77fdaa12
JB		 1968 mutex_lock(&ifmgd->mtx);
1969
1970 if (!ifmgd->associated)
1971 goto out;
1972
133d40f9
SG		 1973 mutex_lock(&sdata->local->mtx);
1974
1975 if (sdata->local->tmp_channel || sdata->local->scanning) {
1976 mutex_unlock(&sdata->local->mtx);
1977 goto out;
1978 }
1979
e87cc472 1980 if (beacon)
bdcbd8e0 1981 mlme_dbg_ratelimited(sdata,
112c31f0 1982 "detected beacon loss from AP - probing\n");
bdcbd8e0 1983
6efb71b0
HS		 1984 ieee80211_cqm_rssi_notify(&sdata->vif,
1985 NL80211_CQM_RSSI_BEACON_LOSS_EVENT, GFP_KERNEL);
04de8381 1986
b291ba11
JB		 1987 /*
1988 * The driver/our work has already reported this event or the
1989 * connection monitoring has kicked in and we have already sent
1990 * a probe request. Or maybe the AP died and the driver keeps
1991 * reporting until we disassociate...
1992 *
1993 * In either case we have to ignore the current call to this
1994 * function (except for setting the correct probe reason bit)
1995 * because otherwise we would reset the timer every time and
1996 * never check whether we received a probe response!
1997 */
1998 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1999 IEEE80211_STA_CONNECTION_POLL))
2000 already = true;
2001
2002 if (beacon)
2003 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
2004 else
2005 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2006
133d40f9
SG		 2007 mutex_unlock(&sdata->local->mtx);
2008
b291ba11
JB		 2009 if (already)
2010 goto out;
2011
4e751843
JB		 2012 mutex_lock(&sdata->local->iflist_mtx);
2013 ieee80211_recalc_ps(sdata->local, -1);
2014 mutex_unlock(&sdata->local->iflist_mtx);
2015
a43abf29
ML		 2016 ifmgd->probe_send_count = 0;
2017 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12
JB		 2018 out:
2019 mutex_unlock(&ifmgd->mtx);
04de8381
KV		 2020}
2021
a619a4c0
JO		 2022struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2023 struct ieee80211_vif *vif)
2024{
2025 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2026 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d9b3b28b 2027 struct cfg80211_bss *cbss;
a619a4c0
JO		 2028 struct sk_buff *skb;
2029 const u8 *ssid;
88c868c4 2030 int ssid_len;
a619a4c0
JO		 2031
2032 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2033 return NULL;
2034
2035 ASSERT_MGD_MTX(ifmgd);
2036
d9b3b28b
EP		 2037 if (ifmgd->associated)
2038 cbss = ifmgd->associated;
2039 else if (ifmgd->auth_data)
2040 cbss = ifmgd->auth_data->bss;
2041 else if (ifmgd->assoc_data)
2042 cbss = ifmgd->assoc_data->bss;
2043 else
a619a4c0
JO		 2044 return NULL;
2045
9caf0364 2046 rcu_read_lock();
d9b3b28b 2047 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
88c868c4
SG		 2048 if (WARN_ON_ONCE(ssid == NULL))
2049 ssid_len = 0;
2050 else
2051 ssid_len = ssid[1];
2052
d9b3b28b 2053 skb = ieee80211_build_probe_req(sdata, cbss->bssid,
55de908a 2054 (u32) -1, cbss->channel,
6b77863b 2055 ssid + 2, ssid_len,
85a237fe 2056 NULL, 0, true);
9caf0364 2057 rcu_read_unlock();
a619a4c0
JO		 2058
2059 return skb;
2060}
2061EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2062
eef9e54c 2063static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
1e4dcd01
JO		 2064{
2065 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 2066 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
1e4dcd01
JO		 2067
2068 mutex_lock(&ifmgd->mtx);
2069 if (!ifmgd->associated) {
2070 mutex_unlock(&ifmgd->mtx);
2071 return;
2072 }
2073
37ad3888
JB		 2074 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2075 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
eef9e54c 2076 true, frame_buf);
882a7c69 2077 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
5b36ebd8
JB		 2078 ieee80211_wake_queues_by_reason(&sdata->local->hw,
2079 IEEE80211_QUEUE_STOP_REASON_CSA);
1e4dcd01 2080 mutex_unlock(&ifmgd->mtx);
7da7cc1d 2081
1e4dcd01
JO		 2082 /*
2083 * must be outside lock due to cfg80211,
2084 * but that's not a problem.
2085 */
6ae16775 2086 cfg80211_send_deauth(sdata->dev, frame_buf, IEEE80211_DEAUTH_FRAME_LEN);
1e4dcd01
JO		 2087}
2088
cc74c0c7 2089static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 2090{
2091 struct ieee80211_sub_if_data *sdata =
2092 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 2093 u.mgd.beacon_connection_loss_work);
a85e1d55
PS		 2094 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2095 struct sta_info *sta;
2096
2097 if (ifmgd->associated) {
30fa9047 2098 rcu_read_lock();
a85e1d55
PS		 2099 sta = sta_info_get(sdata, ifmgd->bssid);
2100 if (sta)
2101 sta->beacon_loss_count++;
30fa9047 2102 rcu_read_unlock();
a85e1d55 2103 }
b291ba11 2104
682bd38b 2105 if (ifmgd->connection_loss) {
882a7c69
JB		 2106 sdata_info(sdata, "Connection to AP %pM lost\n",
2107 ifmgd->bssid);
eef9e54c 2108 __ieee80211_disconnect(sdata);
882a7c69 2109 } else {
1e4dcd01 2110 ieee80211_mgd_probe_ap(sdata, true);
882a7c69
JB		 2111 }
2112}
2113
2114static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2115{
2116 struct ieee80211_sub_if_data *sdata =
2117 container_of(work, struct ieee80211_sub_if_data,
2118 u.mgd.csa_connection_drop_work);
2119
eef9e54c 2120 __ieee80211_disconnect(sdata);
b291ba11
JB		 2121}
2122
04de8381
KV		 2123void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2124{
2125 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 2126 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 2127
b5878a2d
JB		 2128 trace_api_beacon_loss(sdata);
2129
1e4dcd01 2130 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
682bd38b 2131 sdata->u.mgd.connection_loss = false;
1e4dcd01 2132 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 2133}
2134EXPORT_SYMBOL(ieee80211_beacon_loss);
2135
1e4dcd01
JO		 2136void ieee80211_connection_loss(struct ieee80211_vif *vif)
2137{
2138 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2139 struct ieee80211_hw *hw = &sdata->local->hw;
2140
b5878a2d
JB		 2141 trace_api_connection_loss(sdata);
2142
682bd38b 2143 sdata->u.mgd.connection_loss = true;
1e4dcd01
JO		 2144 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2145}
2146EXPORT_SYMBOL(ieee80211_connection_loss);
2147
2148
66e67e41
JB		 2149static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2150 bool assoc)
2151{
2152 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2153
2154 lockdep_assert_held(&sdata->u.mgd.mtx);
2155
66e67e41
JB		 2156 if (!assoc) {
2157 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2158
2159 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2160 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
028e8da0 2161 sdata->u.mgd.flags = 0;
55de908a 2162 ieee80211_vif_release_channel(sdata);
66e67e41
JB		 2163 }
2164
5b112d3d 2165 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
66e67e41
JB		 2166 kfree(auth_data);
2167 sdata->u.mgd.auth_data = NULL;
2168}
2169
2170static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2171 struct ieee80211_mgmt *mgmt, size_t len)
2172{
1672c0e3 2173 struct ieee80211_local *local = sdata->local;
66e67e41
JB		 2174 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2175 u8 *pos;
2176 struct ieee802_11_elems elems;
1672c0e3 2177 u32 tx_flags = 0;
66e67e41
JB		 2178
2179 pos = mgmt->u.auth.variable;
2180 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2181 if (!elems.challenge)
2182 return;
2183 auth_data->expected_transaction = 4;
a1845fc7 2184 drv_mgd_prepare_tx(sdata->local, sdata);
1672c0e3
JB		 2185 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2186 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2187 IEEE80211_TX_INTFL_MLME_CONN_TX;
700e8ea6 2188 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
66e67e41
JB		 2189 elems.challenge - 2, elems.challenge_len + 2,
2190 auth_data->bss->bssid, auth_data->bss->bssid,
2191 auth_data->key, auth_data->key_len,
1672c0e3 2192 auth_data->key_idx, tx_flags);
66e67e41
JB		 2193}
2194
2195static enum rx_mgmt_action __must_check
2196ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2197 struct ieee80211_mgmt *mgmt, size_t len)
2198{
2199 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2200 u8 bssid[ETH_ALEN];
2201 u16 auth_alg, auth_transaction, status_code;
2202 struct sta_info *sta;
2203
2204 lockdep_assert_held(&ifmgd->mtx);
2205
2206 if (len < 24 + 6)
2207 return RX_MGMT_NONE;
2208
2209 if (!ifmgd->auth_data || ifmgd->auth_data->done)
2210 return RX_MGMT_NONE;
2211
2212 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2213
b203ca39 2214 if (!ether_addr_equal(bssid, mgmt->bssid))
66e67e41
JB		 2215 return RX_MGMT_NONE;
2216
2217 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2218 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2219 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2220
2221 if (auth_alg != ifmgd->auth_data->algorithm ||
0f4126e8
JM		 2222 auth_transaction != ifmgd->auth_data->expected_transaction) {
2223 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2224 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2225 auth_transaction,
2226 ifmgd->auth_data->expected_transaction);
66e67e41 2227 return RX_MGMT_NONE;
0f4126e8 2228 }
66e67e41
JB		 2229
2230 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2231 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2232 mgmt->sa, status_code);
dac211ec
EP		 2233 ieee80211_destroy_auth_data(sdata, false);
2234 return RX_MGMT_CFG80211_RX_AUTH;
66e67e41
JB		 2235 }
2236
2237 switch (ifmgd->auth_data->algorithm) {
2238 case WLAN_AUTH_OPEN:
2239 case WLAN_AUTH_LEAP:
2240 case WLAN_AUTH_FT:
6b8ece3a 2241 case WLAN_AUTH_SAE:
66e67e41
JB		 2242 break;
2243 case WLAN_AUTH_SHARED_KEY:
2244 if (ifmgd->auth_data->expected_transaction != 4) {
2245 ieee80211_auth_challenge(sdata, mgmt, len);
2246 /* need another frame */
2247 return RX_MGMT_NONE;
2248 }
2249 break;
2250 default:
2251 WARN_ONCE(1, "invalid auth alg %d",
2252 ifmgd->auth_data->algorithm);
2253 return RX_MGMT_NONE;
2254 }
2255
bdcbd8e0 2256 sdata_info(sdata, "authenticated\n");
66e67e41
JB		 2257 ifmgd->auth_data->done = true;
2258 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
89afe614 2259 ifmgd->auth_data->timeout_started = true;
66e67e41
JB		 2260 run_again(ifmgd, ifmgd->auth_data->timeout);
2261
6b8ece3a
JM		 2262 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2263 ifmgd->auth_data->expected_transaction != 2) {
2264 /*
2265 * Report auth frame to user space for processing since another
2266 * round of Authentication frames is still needed.
2267 */
2268 return RX_MGMT_CFG80211_RX_AUTH;
2269 }
2270
66e67e41
JB		 2271 /* move station state to auth */
2272 mutex_lock(&sdata->local->sta_mtx);
2273 sta = sta_info_get(sdata, bssid);
2274 if (!sta) {
2275 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2276 goto out_err;
2277 }
2278 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
bdcbd8e0 2279 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
66e67e41
JB		 2280 goto out_err;
2281 }
2282 mutex_unlock(&sdata->local->sta_mtx);
2283
2284 return RX_MGMT_CFG80211_RX_AUTH;
2285 out_err:
2286 mutex_unlock(&sdata->local->sta_mtx);
2287 /* ignore frame -- wait for timeout */
2288 return RX_MGMT_NONE;
2289}
2290
2291
77fdaa12
JB		 2292static enum rx_mgmt_action __must_check
2293ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
77fdaa12 2294 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2295{
46900298 2296 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 2297 const u8 *bssid = NULL;
f0706e82
JB		 2298 u16 reason_code;
2299
66e67e41
JB		 2300 lockdep_assert_held(&ifmgd->mtx);
2301
f4ea83dd 2302 if (len < 24 + 2)
77fdaa12 2303 return RX_MGMT_NONE;
f0706e82 2304
66e67e41 2305 if (!ifmgd->associated ||
b203ca39 2306 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
66e67e41 2307 return RX_MGMT_NONE;
77fdaa12 2308
0c1ad2ca 2309 bssid = ifmgd->associated->bssid;
f0706e82
JB		 2310
2311 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2312
bdcbd8e0
JB		 2313 sdata_info(sdata, "deauthenticated from %pM (Reason: %u)\n",
2314 bssid, reason_code);
77fdaa12 2315
37ad3888
JB		 2316 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2317
77fdaa12 2318 return RX_MGMT_CFG80211_DEAUTH;
f0706e82
JB		 2319}
2320
2321
77fdaa12
JB		 2322static enum rx_mgmt_action __must_check
2323ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2324 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2325{
46900298 2326 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 2327 u16 reason_code;
2328
66e67e41 2329 lockdep_assert_held(&ifmgd->mtx);
77fdaa12 2330
66e67e41 2331 if (len < 24 + 2)
77fdaa12
JB		 2332 return RX_MGMT_NONE;
2333
66e67e41 2334 if (!ifmgd->associated ||
b203ca39 2335 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
77fdaa12 2336 return RX_MGMT_NONE;
f0706e82
JB		 2337
2338 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2339
bdcbd8e0
JB		 2340 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2341 mgmt->sa, reason_code);
f0706e82 2342
37ad3888
JB		 2343 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2344
77fdaa12 2345 return RX_MGMT_CFG80211_DISASSOC;
f0706e82
JB		 2346}
2347
c74d084f
CL		 2348static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2349 u8 *supp_rates, unsigned int supp_rates_len,
2350 u32 *rates, u32 *basic_rates,
2351 bool *have_higher_than_11mbit,
2352 int *min_rate, int *min_rate_index)
2353{
2354 int i, j;
2355
2356 for (i = 0; i < supp_rates_len; i++) {
2357 int rate = (supp_rates[i] & 0x7f) * 5;
2358 bool is_basic = !!(supp_rates[i] & 0x80);
2359
2360 if (rate > 110)
2361 *have_higher_than_11mbit = true;
2362
2363 /*
2364 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2365 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2366 *
2367 * Note: Even through the membership selector and the basic
2368 * rate flag share the same bit, they are not exactly
2369 * the same.
2370 */
2371 if (!!(supp_rates[i] & 0x80) &&
2372 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2373 continue;
2374
2375 for (j = 0; j < sband->n_bitrates; j++) {
2376 if (sband->bitrates[j].bitrate == rate) {
2377 *rates |= BIT(j);
2378 if (is_basic)
2379 *basic_rates |= BIT(j);
2380 if (rate < *min_rate) {
2381 *min_rate = rate;
2382 *min_rate_index = j;
2383 }
2384 break;
2385 }
2386 }
2387 }
2388}
f0706e82 2389
66e67e41
JB		 2390static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2391 bool assoc)
2392{
2393 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2394
2395 lockdep_assert_held(&sdata->u.mgd.mtx);
2396
66e67e41
JB		 2397 if (!assoc) {
2398 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2399
2400 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2401 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
028e8da0 2402 sdata->u.mgd.flags = 0;
55de908a 2403 ieee80211_vif_release_channel(sdata);
66e67e41
JB		 2404 }
2405
2406 kfree(assoc_data);
2407 sdata->u.mgd.assoc_data = NULL;
2408}
2409
2410static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2411 struct cfg80211_bss *cbss,
af6b6374 2412 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2413{
46900298 2414 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 2415 struct ieee80211_local *local = sdata->local;
8318d78a 2416 struct ieee80211_supported_band *sband;
f0706e82 2417 struct sta_info *sta;
af6b6374 2418 u8 *pos;
af6b6374 2419 u16 capab_info, aid;
f0706e82 2420 struct ieee802_11_elems elems;
bda3933a 2421 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
ae5eb026 2422 u32 changed = 0;
c74d084f 2423 int err;
f0706e82 2424
af6b6374 2425 /* AssocResp and ReassocResp have identical structure */
f0706e82 2426
f0706e82 2427 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 2428 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 2429
1dd84aa2 2430 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
bdcbd8e0
JB		 2431 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2432 aid);
1dd84aa2
JB		 2433 aid &= ~(BIT(15) | BIT(14));
2434
05cb9108
JB		 2435 ifmgd->broken_ap = false;
2436
2437 if (aid == 0 || aid > IEEE80211_MAX_AID) {
bdcbd8e0
JB		 2438 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2439 aid);
05cb9108
JB		 2440 aid = 0;
2441 ifmgd->broken_ap = true;
2442 }
2443
af6b6374
JB		 2444 pos = mgmt->u.assoc_resp.variable;
2445 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2446
f0706e82 2447 if (!elems.supp_rates) {
bdcbd8e0 2448 sdata_info(sdata, "no SuppRates element in AssocResp\n");
af6b6374 2449 return false;
f0706e82
JB		 2450 }
2451
46900298 2452 ifmgd->aid = aid;
f0706e82 2453
30eb1dc2
JB		 2454 /*
2455 * We previously checked these in the beacon/probe response, so
2456 * they should be present here. This is just a safety net.
2457 */
2458 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2459 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2460 sdata_info(sdata,
2461 "HT AP is missing WMM params or HT capability/operation in AssocResp\n");
2462 return false;
2463 }
2464
2465 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2466 (!elems.vht_cap_elem || !elems.vht_operation)) {
2467 sdata_info(sdata,
2468 "VHT AP is missing VHT capability/operation in AssocResp\n");
2469 return false;
2470 }
2471
2a33bee2
GE		 2472 mutex_lock(&sdata->local->sta_mtx);
2473 /*
2474 * station info was already allocated and inserted before
2475 * the association and should be available to us
2476 */
7852e361 2477 sta = sta_info_get(sdata, cbss->bssid);
2a33bee2
GE		 2478 if (WARN_ON(!sta)) {
2479 mutex_unlock(&sdata->local->sta_mtx);
af6b6374 2480 return false;
77fdaa12 2481 }
05e5e883 2482
55de908a 2483 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
f709fc69 2484
30eb1dc2 2485 /* Set up internal HT/VHT capabilities */
a8243b72 2486 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
ef96a842 2487 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
e1a0c6b3 2488 elems.ht_cap_elem, sta);
64f68e5d 2489
818255ea
MP		 2490 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2491 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
4a34215e 2492 elems.vht_cap_elem, sta);
818255ea 2493
30eb1dc2
JB		 2494 /*
2495 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
2496 * in their association response, so ignore that data for our own
2497 * configuration. If it changed since the last beacon, we'll get the
2498 * next beacon and update then.
2499 */
1128958d 2500
bee7f586
JB		 2501 /*
2502 * If an operating mode notification IE is present, override the
2503 * NSS calculation (that would be done in rate_control_rate_init())
2504 * and use the # of streams from that element.
2505 */
2506 if (elems.opmode_notif &&
2507 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
2508 u8 nss;
2509
2510 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
2511 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
2512 nss += 1;
2513 sta->sta.rx_nss = nss;
2514 }
2515
4b7679a5 2516 rate_control_rate_init(sta);
f0706e82 2517
46900298 2518 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
c2c98fde 2519 set_sta_flag(sta, WLAN_STA_MFP);
5394af4d 2520
ddf4ac53 2521 if (elems.wmm_param)
c2c98fde 2522 set_sta_flag(sta, WLAN_STA_WME);
ddf4ac53 2523
3e4d40fa 2524 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
c8987876
JB		 2525 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2526 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2527 if (err) {
bdcbd8e0
JB		 2528 sdata_info(sdata,
2529 "failed to move station %pM to desired state\n",
2530 sta->sta.addr);
c8987876
JB		 2531 WARN_ON(__sta_info_destroy(sta));
2532 mutex_unlock(&sdata->local->sta_mtx);
2533 return false;
2534 }
2535
7852e361 2536 mutex_unlock(&sdata->local->sta_mtx);
ddf4ac53 2537
f2176d72
JO		 2538 /*
2539 * Always handle WMM once after association regardless
2540 * of the first value the AP uses. Setting -1 here has
2541 * that effect because the AP values is an unsigned
2542 * 4-bit value.
2543 */
2544 ifmgd->wmm_last_param_set = -1;
2545
ddf4ac53 2546 if (elems.wmm_param)
4ced3f74 2547 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 2548 elems.wmm_param_len);
aa837e1d 2549 else
3abead59
JB		 2550 ieee80211_set_wmm_default(sdata, false);
2551 changed |= BSS_CHANGED_QOS;
f0706e82 2552
60f8b39c
JB		 2553 /* set AID and assoc capability,
2554 * ieee80211_set_associated() will tell the driver */
2555 bss_conf->aid = aid;
2556 bss_conf->assoc_capability = capab_info;
0c1ad2ca 2557 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 2558
d524215f
FF		 2559 /*
2560 * If we're using 4-addr mode, let the AP know that we're
2561 * doing so, so that it can create the STA VLAN on its side
2562 */
2563 if (ifmgd->use_4addr)
2564 ieee80211_send_4addr_nullfunc(local, sdata);
2565
15b7b062 2566 /*
b291ba11
JB		 2567 * Start timer to probe the connection to the AP now.
2568 * Also start the timer that will detect beacon loss.
15b7b062 2569 */
b291ba11 2570 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 2571 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 2572
af6b6374 2573 return true;
f0706e82
JB		 2574}
2575
66e67e41
JB		 2576static enum rx_mgmt_action __must_check
2577ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2578 struct ieee80211_mgmt *mgmt, size_t len,
2579 struct cfg80211_bss **bss)
2580{
2581 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2582 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2583 u16 capab_info, status_code, aid;
2584 struct ieee802_11_elems elems;
2585 u8 *pos;
2586 bool reassoc;
2587
2588 lockdep_assert_held(&ifmgd->mtx);
2589
2590 if (!assoc_data)
2591 return RX_MGMT_NONE;
b203ca39 2592 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
66e67e41
JB		 2593 return RX_MGMT_NONE;
2594
2595 /*
2596 * AssocResp and ReassocResp have identical structure, so process both
2597 * of them in this function.
2598 */
2599
2600 if (len < 24 + 6)
2601 return RX_MGMT_NONE;
2602
2603 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2604 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2605 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2606 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2607
bdcbd8e0
JB		 2608 sdata_info(sdata,
2609 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2610 reassoc ? "Rea" : "A", mgmt->sa,
2611 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
66e67e41
JB		 2612
2613 pos = mgmt->u.assoc_resp.variable;
2614 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2615
2616 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
2617 elems.timeout_int && elems.timeout_int_len == 5 &&
2618 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
2619 u32 tu, ms;
2620 tu = get_unaligned_le32(elems.timeout_int + 1);
2621 ms = tu * 1024 / 1000;
bdcbd8e0
JB		 2622 sdata_info(sdata,
2623 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2624 mgmt->sa, tu, ms);
66e67e41 2625 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
89afe614 2626 assoc_data->timeout_started = true;
66e67e41
JB		 2627 if (ms > IEEE80211_ASSOC_TIMEOUT)
2628 run_again(ifmgd, assoc_data->timeout);
2629 return RX_MGMT_NONE;
2630 }
2631
2632 *bss = assoc_data->bss;
2633
2634 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2635 sdata_info(sdata, "%pM denied association (code=%d)\n",
2636 mgmt->sa, status_code);
66e67e41
JB		 2637 ieee80211_destroy_assoc_data(sdata, false);
2638 } else {
66e67e41
JB		 2639 if (!ieee80211_assoc_success(sdata, *bss, mgmt, len)) {
2640 /* oops -- internal error -- send timeout for now */
10a9109f 2641 ieee80211_destroy_assoc_data(sdata, false);
5b112d3d 2642 cfg80211_put_bss(sdata->local->hw.wiphy, *bss);
66e67e41
JB		 2643 return RX_MGMT_CFG80211_ASSOC_TIMEOUT;
2644 }
635d999f 2645 sdata_info(sdata, "associated\n");
79ebfb85
JB		 2646
2647 /*
2648 * destroy assoc_data afterwards, as otherwise an idle
2649 * recalc after assoc_data is NULL but before associated
2650 * is set can cause the interface to go idle
2651 */
2652 ieee80211_destroy_assoc_data(sdata, true);
66e67e41
JB		 2653 }
2654
2655 return RX_MGMT_CFG80211_RX_ASSOC;
2656}
8e3c1b77 2657
98c8fccf 2658static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
8e3c1b77 2659 struct ieee80211_mgmt *mgmt, size_t len,
98c8fccf 2660 struct ieee80211_rx_status *rx_status,
d45c4172 2661 struct ieee802_11_elems *elems)
98c8fccf
JB		 2662{
2663 struct ieee80211_local *local = sdata->local;
2664 int freq;
c2b13452 2665 struct ieee80211_bss *bss;
98c8fccf 2666 struct ieee80211_channel *channel;
56007a02
JB		 2667 bool need_ps = false;
2668
826262c3
JB		 2669 if ((sdata->u.mgd.associated &&
2670 ether_addr_equal(mgmt->bssid, sdata->u.mgd.associated->bssid)) ||
2671 (sdata->u.mgd.assoc_data &&
2672 ether_addr_equal(mgmt->bssid,
2673 sdata->u.mgd.assoc_data->bss->bssid))) {
56007a02 2674 /* not previously set so we may need to recalc */
826262c3
JB		 2675 need_ps = sdata->u.mgd.associated && !sdata->u.mgd.dtim_period;
2676
2677 if (elems->tim && !elems->parse_error) {
4a3cb702 2678 const struct ieee80211_tim_ie *tim_ie = elems->tim;
826262c3
JB		 2679 sdata->u.mgd.dtim_period = tim_ie->dtim_period;
2680 }
56007a02 2681 }
98c8fccf
JB		 2682
2683 if (elems->ds_params && elems->ds_params_len == 1)
59eb21a6
BR		 2684 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
2685 rx_status->band);
98c8fccf
JB		 2686 else
2687 freq = rx_status->freq;
2688
2689 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2690
2691 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2692 return;
2693
98c8fccf 2694 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
d45c4172 2695 channel);
77fdaa12
JB		 2696 if (bss)
2697 ieee80211_rx_bss_put(local, bss);
2698
2699 if (!sdata->u.mgd.associated)
98c8fccf
JB		 2700 return;
2701
56007a02
JB		 2702 if (need_ps) {
2703 mutex_lock(&local->iflist_mtx);
2704 ieee80211_recalc_ps(local, -1);
2705 mutex_unlock(&local->iflist_mtx);
2706 }
2707
5bc1420b
JB		 2708 if (elems->ch_switch_ie &&
2709 memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid, ETH_ALEN) == 0)
2710 ieee80211_sta_process_chanswitch(sdata, elems->ch_switch_ie,
5ce6e438 2711 bss, rx_status->mactime);
f0706e82
JB		 2712}
2713
2714
f698d856 2715static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 2716 struct sk_buff *skb)
f0706e82 2717{
af6b6374 2718 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 2719 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 2720 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2721 size_t baselen, len = skb->len;
ae6a44e3
EK		 2722 struct ieee802_11_elems elems;
2723
15b7b062
KV		 2724 ifmgd = &sdata->u.mgd;
2725
77fdaa12
JB		 2726 ASSERT_MGD_MTX(ifmgd);
2727
b203ca39 2728 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
8e7cdbb6
TW		 2729 return; /* ignore ProbeResp to foreign address */
2730
ae6a44e3
EK		 2731 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2732 if (baselen > len)
2733 return;
2734
2735 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2736 &elems);
2737
d45c4172 2738 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
9859b81e 2739
77fdaa12 2740 if (ifmgd->associated &&
b203ca39 2741 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
4e5ff376 2742 ieee80211_reset_ap_probe(sdata);
66e67e41
JB		 2743
2744 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
b203ca39 2745 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
66e67e41 2746 /* got probe response, continue with auth */
bdcbd8e0 2747 sdata_info(sdata, "direct probe responded\n");
66e67e41
JB		 2748 ifmgd->auth_data->tries = 0;
2749 ifmgd->auth_data->timeout = jiffies;
89afe614 2750 ifmgd->auth_data->timeout_started = true;
66e67e41
JB		 2751 run_again(ifmgd, ifmgd->auth_data->timeout);
2752 }
f0706e82
JB		 2753}
2754
d91f36db
JB		 2755/*
2756 * This is the canonical list of information elements we care about,
2757 * the filter code also gives us all changes to the Microsoft OUI
2758 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2759 *
2760 * We implement beacon filtering in software since that means we can
2761 * avoid processing the frame here and in cfg80211, and userspace
2762 * will not be able to tell whether the hardware supports it or not.
2763 *
2764 * XXX: This list needs to be dynamic -- userspace needs to be able to
2765 * add items it requires. It also needs to be able to tell us to
2766 * look out for other vendor IEs.
2767 */
2768static const u64 care_about_ies =
1d4df3a5
JB		 2769 (1ULL << WLAN_EID_COUNTRY) |
2770 (1ULL << WLAN_EID_ERP_INFO) |
2771 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2772 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2773 (1ULL << WLAN_EID_HT_CAPABILITY) |
074d46d1 2774 (1ULL << WLAN_EID_HT_OPERATION);
d91f36db 2775
30eb1dc2
JB		 2776static enum rx_mgmt_action
2777ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
2778 struct ieee80211_mgmt *mgmt, size_t len,
2779 u8 *deauth_buf, struct ieee80211_rx_status *rx_status)
f0706e82 2780{
d91f36db 2781 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 2782 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 2783 size_t baselen;
2784 struct ieee802_11_elems elems;
f698d856 2785 struct ieee80211_local *local = sdata->local;
55de908a
JB		 2786 struct ieee80211_chanctx_conf *chanctx_conf;
2787 struct ieee80211_channel *chan;
bee7f586 2788 struct sta_info *sta;
471b3efd 2789 u32 changed = 0;
f87ad637 2790 bool erp_valid;
7a5158ef 2791 u8 erp_value = 0;
d91f36db 2792 u32 ncrc;
77fdaa12
JB		 2793 u8 *bssid;
2794
66e67e41 2795 lockdep_assert_held(&ifmgd->mtx);
f0706e82 2796
ae6a44e3
EK		 2797 /* Process beacon from the current BSS */
2798 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2799 if (baselen > len)
30eb1dc2 2800 return RX_MGMT_NONE;
ae6a44e3 2801
55de908a
JB		 2802 rcu_read_lock();
2803 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2804 if (!chanctx_conf) {
2805 rcu_read_unlock();
30eb1dc2 2806 return RX_MGMT_NONE;
55de908a
JB		 2807 }
2808
4bf88530 2809 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
55de908a 2810 rcu_read_unlock();
30eb1dc2 2811 return RX_MGMT_NONE;
55de908a 2812 }
4bf88530 2813 chan = chanctx_conf->def.chan;
55de908a 2814 rcu_read_unlock();
f0706e82 2815
c65dd147 2816 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
b203ca39 2817 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
66e67e41
JB		 2818 ieee802_11_parse_elems(mgmt->u.beacon.variable,
2819 len - baselen, &elems);
77fdaa12 2820
d45c4172 2821 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
66e67e41 2822 ifmgd->assoc_data->have_beacon = true;
c65dd147 2823 ifmgd->assoc_data->need_beacon = false;
ef429dad
JB		 2824 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
2825 sdata->vif.bss_conf.sync_tsf =
2826 le64_to_cpu(mgmt->u.beacon.timestamp);
2827 sdata->vif.bss_conf.sync_device_ts =
2828 rx_status->device_timestamp;
2829 if (elems.tim)
2830 sdata->vif.bss_conf.sync_dtim_count =
2831 elems.tim->dtim_count;
2832 else
2833 sdata->vif.bss_conf.sync_dtim_count = 0;
2834 }
66e67e41
JB		 2835 /* continue assoc process */
2836 ifmgd->assoc_data->timeout = jiffies;
89afe614 2837 ifmgd->assoc_data->timeout_started = true;
66e67e41 2838 run_again(ifmgd, ifmgd->assoc_data->timeout);
30eb1dc2 2839 return RX_MGMT_NONE;
66e67e41 2840 }
77fdaa12 2841
66e67e41 2842 if (!ifmgd->associated ||
b203ca39 2843 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
30eb1dc2 2844 return RX_MGMT_NONE;
66e67e41 2845 bssid = ifmgd->associated->bssid;
f0706e82 2846
17e4ec14
JM		 2847 /* Track average RSSI from the Beacon frames of the current AP */
2848 ifmgd->last_beacon_signal = rx_status->signal;
2849 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
2850 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3ba06c6f 2851 ifmgd->ave_beacon_signal = rx_status->signal * 16;
17e4ec14 2852 ifmgd->last_cqm_event_signal = 0;
391a200a 2853 ifmgd->count_beacon_signal = 1;
615f7b9b 2854 ifmgd->last_ave_beacon_signal = 0;
17e4ec14
JM		 2855 } else {
2856 ifmgd->ave_beacon_signal =
2857 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
2858 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
2859 ifmgd->ave_beacon_signal) / 16;
391a200a 2860 ifmgd->count_beacon_signal++;
17e4ec14 2861 }
615f7b9b
MV		 2862
2863 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
2864 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
2865 int sig = ifmgd->ave_beacon_signal;
2866 int last_sig = ifmgd->last_ave_beacon_signal;
2867
2868 /*
2869 * if signal crosses either of the boundaries, invoke callback
2870 * with appropriate parameters
2871 */
2872 if (sig > ifmgd->rssi_max_thold &&
2873 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
2874 ifmgd->last_ave_beacon_signal = sig;
887da917 2875 drv_rssi_callback(local, sdata, RSSI_EVENT_HIGH);
615f7b9b
MV		 2876 } else if (sig < ifmgd->rssi_min_thold &&
2877 (last_sig >= ifmgd->rssi_max_thold ||
2878 last_sig == 0)) {
2879 ifmgd->last_ave_beacon_signal = sig;
887da917 2880 drv_rssi_callback(local, sdata, RSSI_EVENT_LOW);
615f7b9b
MV		 2881 }
2882 }
2883
17e4ec14 2884 if (bss_conf->cqm_rssi_thold &&
391a200a 2885 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
ea086359 2886 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
17e4ec14
JM		 2887 int sig = ifmgd->ave_beacon_signal / 16;
2888 int last_event = ifmgd->last_cqm_event_signal;
2889 int thold = bss_conf->cqm_rssi_thold;
2890 int hyst = bss_conf->cqm_rssi_hyst;
2891 if (sig < thold &&
2892 (last_event == 0 || sig < last_event - hyst)) {
2893 ifmgd->last_cqm_event_signal = sig;
2894 ieee80211_cqm_rssi_notify(
2895 &sdata->vif,
2896 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
2897 GFP_KERNEL);
2898 } else if (sig > thold &&
2899 (last_event == 0 || sig > last_event + hyst)) {
2900 ifmgd->last_cqm_event_signal = sig;
2901 ieee80211_cqm_rssi_notify(
2902 &sdata->vif,
2903 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
2904 GFP_KERNEL);
2905 }
2906 }
2907
b291ba11 2908 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
bdcbd8e0 2909 mlme_dbg_ratelimited(sdata,
112c31f0 2910 "cancelling AP probe due to a received beacon\n");
925e64c3 2911 mutex_lock(&local->mtx);
b291ba11 2912 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
925e64c3
SG		 2913 ieee80211_run_deferred_scan(local);
2914 mutex_unlock(&local->mtx);
2915
4e751843
JB		 2916 mutex_lock(&local->iflist_mtx);
2917 ieee80211_recalc_ps(local, -1);
2918 mutex_unlock(&local->iflist_mtx);
92778180
JM		 2919 }
2920
b291ba11
JB		 2921 /*
2922 * Push the beacon loss detection into the future since
2923 * we are processing a beacon from the AP just now.
2924 */
d3a910a8 2925 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 2926
d91f36db
JB		 2927 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
2928 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
2929 len - baselen, &elems,
2930 care_about_ies, ncrc);
2931
25c9c875 2932 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
f87ad637
RR		 2933 bool directed_tim = ieee80211_check_tim(elems.tim,
2934 elems.tim_len,
2935 ifmgd->aid);
1fb3606b 2936 if (directed_tim) {
572e0012 2937 if (local->hw.conf.dynamic_ps_timeout > 0) {
70b12f26
RW		 2938 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2939 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2940 ieee80211_hw_config(local,
2941 IEEE80211_CONF_CHANGE_PS);
2942 }
572e0012 2943 ieee80211_send_nullfunc(local, sdata, 0);
6f0756a3 2944 } else if (!local->pspolling && sdata->u.mgd.powersave) {
572e0012
KV		 2945 local->pspolling = true;
2946
2947 /*
2948 * Here is assumed that the driver will be
2949 * able to send ps-poll frame and receive a
2950 * response even though power save mode is
2951 * enabled, but some drivers might require
2952 * to disable power save here. This needs
2953 * to be investigated.
2954 */
2955 ieee80211_send_pspoll(local, sdata);
2956 }
a97b77b9
VN		 2957 }
2958 }
7a5158ef 2959
488dd7b5
JB		 2960 if (sdata->vif.p2p) {
2961 u8 noa[2];
2962 int ret;
2963
2964 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
2965 len - baselen,
2966 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
2967 noa, sizeof(noa));
2968 if (ret >= 2 && sdata->u.mgd.p2p_noa_index != noa[0]) {
2969 bss_conf->p2p_oppps = noa[1] & 0x80;
2970 bss_conf->p2p_ctwindow = noa[1] & 0x7f;
2971 changed |= BSS_CHANGED_P2P_PS;
2972 sdata->u.mgd.p2p_noa_index = noa[0];
2973 /*
2974 * make sure we update all information, the CRC
2975 * mechanism doesn't look at P2P attributes.
2976 */
2977 ifmgd->beacon_crc_valid = false;
2978 }
2979 }
2980
d8ec4433 2981 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
30eb1dc2 2982 return RX_MGMT_NONE;
30196673 2983 ifmgd->beacon_crc = ncrc;
d8ec4433 2984 ifmgd->beacon_crc_valid = true;
30196673 2985
d45c4172 2986 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
7d25745d
JB		 2987
2988 if (ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2989 elems.wmm_param_len))
2990 changed |= BSS_CHANGED_QOS;
2991
c65dd147
EG		 2992 /*
2993 * If we haven't had a beacon before, tell the driver about the
ef429dad 2994 * DTIM period (and beacon timing if desired) now.
c65dd147
EG		 2995 */
2996 if (!bss_conf->dtim_period) {
2997 /* a few bogus AP send dtim_period = 0 or no TIM IE */
2998 if (elems.tim)
2999 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3000 else
3001 bss_conf->dtim_period = 1;
ef429dad
JB		 3002
3003 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3004 sdata->vif.bss_conf.sync_tsf =
3005 le64_to_cpu(mgmt->u.beacon.timestamp);
3006 sdata->vif.bss_conf.sync_device_ts =
3007 rx_status->device_timestamp;
3008 if (elems.tim)
3009 sdata->vif.bss_conf.sync_dtim_count =
3010 elems.tim->dtim_count;
3011 else
3012 sdata->vif.bss_conf.sync_dtim_count = 0;
3013 }
3014
c65dd147
EG		 3015 changed |= BSS_CHANGED_DTIM_PERIOD;
3016 }
3017
7a5158ef
JB		 3018 if (elems.erp_info && elems.erp_info_len >= 1) {
3019 erp_valid = true;
3020 erp_value = elems.erp_info[0];
3021 } else {
3022 erp_valid = false;
50c4afb9 3023 }
7a5158ef
JB		 3024 changed |= ieee80211_handle_bss_capability(sdata,
3025 le16_to_cpu(mgmt->u.beacon.capab_info),
3026 erp_valid, erp_value);
f0706e82 3027
1128958d 3028 mutex_lock(&local->sta_mtx);
bee7f586
JB		 3029 sta = sta_info_get(sdata, bssid);
3030
30eb1dc2
JB		 3031 if (ieee80211_config_bw(sdata, sta, elems.ht_operation,
3032 elems.vht_operation, bssid, &changed)) {
3033 mutex_unlock(&local->sta_mtx);
3034 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3035 WLAN_REASON_DEAUTH_LEAVING,
3036 true, deauth_buf);
3037 return RX_MGMT_CFG80211_TX_DEAUTH;
3038 }
bee7f586
JB		 3039
3040 if (sta && elems.opmode_notif)
3041 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3042 rx_status->band, true);
1128958d 3043 mutex_unlock(&local->sta_mtx);
d3c990fb 3044
04b7b2ff
JB		 3045 if (elems.country_elem && elems.pwr_constr_elem &&
3046 mgmt->u.probe_resp.capab_info &
3047 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT))
1ea6f9c0
JB		 3048 changed |= ieee80211_handle_pwr_constr(sdata, chan,
3049 elems.country_elem,
3050 elems.country_elem_len,
3051 elems.pwr_constr_elem);
3f2355cb 3052
471b3efd 3053 ieee80211_bss_info_change_notify(sdata, changed);
30eb1dc2
JB		 3054
3055 return RX_MGMT_NONE;
f0706e82
JB		 3056}
3057
1fa57d01
JB		 3058void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3059 struct sk_buff *skb)
f0706e82 3060{
77fdaa12 3061 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 3062 struct ieee80211_rx_status *rx_status;
f0706e82 3063 struct ieee80211_mgmt *mgmt;
66e67e41 3064 struct cfg80211_bss *bss = NULL;
77fdaa12 3065 enum rx_mgmt_action rma = RX_MGMT_NONE;
30eb1dc2 3066 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
f0706e82
JB		 3067 u16 fc;
3068
f0706e82
JB		 3069 rx_status = (struct ieee80211_rx_status *) skb->cb;
3070 mgmt = (struct ieee80211_mgmt *) skb->data;
3071 fc = le16_to_cpu(mgmt->frame_control);
3072
77fdaa12
JB		 3073 mutex_lock(&ifmgd->mtx);
3074
66e67e41
JB		 3075 switch (fc & IEEE80211_FCTL_STYPE) {
3076 case IEEE80211_STYPE_BEACON:
30eb1dc2
JB		 3077 rma = ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
3078 deauth_buf, rx_status);
66e67e41
JB		 3079 break;
3080 case IEEE80211_STYPE_PROBE_RESP:
3081 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3082 break;
3083 case IEEE80211_STYPE_AUTH:
3084 rma = ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3085 break;
3086 case IEEE80211_STYPE_DEAUTH:
3087 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3088 break;
3089 case IEEE80211_STYPE_DISASSOC:
3090 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3091 break;
3092 case IEEE80211_STYPE_ASSOC_RESP:
3093 case IEEE80211_STYPE_REASSOC_RESP:
3094 rma = ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, &bss);
3095 break;
3096 case IEEE80211_STYPE_ACTION:
3097 switch (mgmt->u.action.category) {
3098 case WLAN_CATEGORY_SPECTRUM_MGMT:
3099 ieee80211_sta_process_chanswitch(sdata,
3100 &mgmt->u.action.u.chan_switch.sw_elem,
3101 (void *)ifmgd->associated->priv,
3102 rx_status->mactime);
77fdaa12 3103 break;
77fdaa12 3104 }
77fdaa12 3105 }
77fdaa12
JB		 3106 mutex_unlock(&ifmgd->mtx);
3107
66e67e41
JB		 3108 switch (rma) {
3109 case RX_MGMT_NONE:
3110 /* no action */
3111 break;
3112 case RX_MGMT_CFG80211_DEAUTH:
ce470613 3113 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
66e67e41
JB		 3114 break;
3115 case RX_MGMT_CFG80211_DISASSOC:
3116 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
3117 break;
3118 case RX_MGMT_CFG80211_RX_AUTH:
3119 cfg80211_send_rx_auth(sdata->dev, (u8 *)mgmt, skb->len);
3120 break;
3121 case RX_MGMT_CFG80211_RX_ASSOC:
3122 cfg80211_send_rx_assoc(sdata->dev, bss, (u8 *)mgmt, skb->len);
3123 break;
3124 case RX_MGMT_CFG80211_ASSOC_TIMEOUT:
3125 cfg80211_send_assoc_timeout(sdata->dev, mgmt->bssid);
3126 break;
30eb1dc2
JB		 3127 case RX_MGMT_CFG80211_TX_DEAUTH:
3128 cfg80211_send_deauth(sdata->dev, deauth_buf,
3129 sizeof(deauth_buf));
3130 break;
66e67e41
JB		 3131 default:
3132 WARN(1, "unexpected: %d", rma);
b054b747 3133 }
f0706e82
JB		 3134}
3135
9c6bd790 3136static void ieee80211_sta_timer(unsigned long data)
f0706e82 3137{
60f8b39c
JB		 3138 struct ieee80211_sub_if_data *sdata =
3139 (struct ieee80211_sub_if_data *) data;
46900298 3140 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
60f8b39c 3141 struct ieee80211_local *local = sdata->local;
f0706e82 3142
5bb644a0
JB		 3143 if (local->quiescing) {
3144 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
3145 return;
3146 }
3147
64592c8f 3148 ieee80211_queue_work(&local->hw, &sdata->work);
f0706e82
JB		 3149}
3150
04ac3c0e 3151static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
6b684db1 3152 u8 *bssid, u8 reason, bool tx)
04ac3c0e 3153{
04ac3c0e 3154 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 3155 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
04ac3c0e 3156
37ad3888 3157 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
6b684db1 3158 tx, frame_buf);
04ac3c0e 3159 mutex_unlock(&ifmgd->mtx);
37ad3888 3160
04ac3c0e
FF		 3161 /*
3162 * must be outside lock due to cfg80211,
3163 * but that's not a problem.
3164 */
6ae16775 3165 cfg80211_send_deauth(sdata->dev, frame_buf, IEEE80211_DEAUTH_FRAME_LEN);
fcac4fb0 3166
04ac3c0e
FF		 3167 mutex_lock(&ifmgd->mtx);
3168}
3169
66e67e41
JB		 3170static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
3171{
3172 struct ieee80211_local *local = sdata->local;
3173 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3174 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
1672c0e3 3175 u32 tx_flags = 0;
66e67e41
JB		 3176
3177 lockdep_assert_held(&ifmgd->mtx);
3178
3179 if (WARN_ON_ONCE(!auth_data))
3180 return -EINVAL;
3181
1672c0e3
JB		 3182 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3183 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3184 IEEE80211_TX_INTFL_MLME_CONN_TX;
3185
66e67e41
JB		 3186 auth_data->tries++;
3187
3188 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
bdcbd8e0
JB		 3189 sdata_info(sdata, "authentication with %pM timed out\n",
3190 auth_data->bss->bssid);
66e67e41
JB		 3191
3192 /*
3193 * Most likely AP is not in the range so remove the
3194 * bss struct for that AP.
3195 */
3196 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3197
3198 return -ETIMEDOUT;
3199 }
3200
a1845fc7
JB		 3201 drv_mgd_prepare_tx(local, sdata);
3202
66e67e41 3203 if (auth_data->bss->proberesp_ies) {
6b8ece3a
JM		 3204 u16 trans = 1;
3205 u16 status = 0;
3206
bdcbd8e0
JB		 3207 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3208 auth_data->bss->bssid, auth_data->tries,
3209 IEEE80211_AUTH_MAX_TRIES);
66e67e41
JB		 3210
3211 auth_data->expected_transaction = 2;
6b8ece3a
JM		 3212
3213 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3214 trans = auth_data->sae_trans;
3215 status = auth_data->sae_status;
3216 auth_data->expected_transaction = trans;
3217 }
3218
3219 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3220 auth_data->data, auth_data->data_len,
66e67e41 3221 auth_data->bss->bssid,
1672c0e3
JB		 3222 auth_data->bss->bssid, NULL, 0, 0,
3223 tx_flags);
66e67e41
JB		 3224 } else {
3225 const u8 *ssidie;
3226
bdcbd8e0
JB		 3227 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
3228 auth_data->bss->bssid, auth_data->tries,
3229 IEEE80211_AUTH_MAX_TRIES);
66e67e41 3230
9caf0364 3231 rcu_read_lock();
66e67e41 3232 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
9caf0364
JB		 3233 if (!ssidie) {
3234 rcu_read_unlock();
66e67e41 3235 return -EINVAL;
9caf0364 3236 }
66e67e41
JB		 3237 /*
3238 * Direct probe is sent to broadcast address as some APs
3239 * will not answer to direct packet in unassociated state.
3240 */
3241 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
1672c0e3 3242 NULL, 0, (u32) -1, true, tx_flags,
55de908a 3243 auth_data->bss->channel, false);
9caf0364 3244 rcu_read_unlock();
66e67e41
JB		 3245 }
3246
1672c0e3
JB		 3247 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
3248 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
89afe614 3249 ifmgd->auth_data->timeout_started = true;
1672c0e3 3250 run_again(ifmgd, auth_data->timeout);
89afe614
JB		 3251 } else {
3252 auth_data->timeout_started = false;
1672c0e3 3253 }
66e67e41
JB		 3254
3255 return 0;
3256}
3257
3258static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3259{
3260 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3261 struct ieee80211_local *local = sdata->local;
3262
3263 lockdep_assert_held(&sdata->u.mgd.mtx);
3264
66e67e41
JB		 3265 assoc_data->tries++;
3266 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
bdcbd8e0
JB		 3267 sdata_info(sdata, "association with %pM timed out\n",
3268 assoc_data->bss->bssid);
66e67e41
JB		 3269
3270 /*
3271 * Most likely AP is not in the range so remove the
3272 * bss struct for that AP.
3273 */
3274 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3275
3276 return -ETIMEDOUT;
3277 }
3278
bdcbd8e0
JB		 3279 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3280 assoc_data->bss->bssid, assoc_data->tries,
3281 IEEE80211_ASSOC_MAX_TRIES);
66e67e41
JB		 3282 ieee80211_send_assoc(sdata);
3283
1672c0e3
JB		 3284 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
3285 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
89afe614 3286 assoc_data->timeout_started = true;
1672c0e3 3287 run_again(&sdata->u.mgd, assoc_data->timeout);
89afe614
JB		 3288 } else {
3289 assoc_data->timeout_started = false;
1672c0e3 3290 }
66e67e41
JB		 3291
3292 return 0;
3293}
3294
1672c0e3
JB		 3295void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3296 __le16 fc, bool acked)
3297{
3298 struct ieee80211_local *local = sdata->local;
3299
3300 sdata->u.mgd.status_fc = fc;
3301 sdata->u.mgd.status_acked = acked;
3302 sdata->u.mgd.status_received = true;
3303
3304 ieee80211_queue_work(&local->hw, &sdata->work);
3305}
3306
1fa57d01 3307void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 3308{
9c6bd790 3309 struct ieee80211_local *local = sdata->local;
1fa57d01 3310 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 3311
77fdaa12
JB		 3312 mutex_lock(&ifmgd->mtx);
3313
1672c0e3
JB		 3314 if (ifmgd->status_received) {
3315 __le16 fc = ifmgd->status_fc;
3316 bool status_acked = ifmgd->status_acked;
3317
3318 ifmgd->status_received = false;
3319 if (ifmgd->auth_data &&
3320 (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) {
3321 if (status_acked) {
3322 ifmgd->auth_data->timeout =
3323 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3324 run_again(ifmgd, ifmgd->auth_data->timeout);
3325 } else {
3326 ifmgd->auth_data->timeout = jiffies - 1;
3327 }
89afe614 3328 ifmgd->auth_data->timeout_started = true;
1672c0e3
JB		 3329 } else if (ifmgd->assoc_data &&
3330 (ieee80211_is_assoc_req(fc) ||
3331 ieee80211_is_reassoc_req(fc))) {
3332 if (status_acked) {
3333 ifmgd->assoc_data->timeout =
3334 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3335 run_again(ifmgd, ifmgd->assoc_data->timeout);
3336 } else {
3337 ifmgd->assoc_data->timeout = jiffies - 1;
3338 }
89afe614 3339 ifmgd->assoc_data->timeout_started = true;
1672c0e3
JB		 3340 }
3341 }
3342
89afe614 3343 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
66e67e41
JB		 3344 time_after(jiffies, ifmgd->auth_data->timeout)) {
3345 if (ifmgd->auth_data->done) {
3346 /*
3347 * ok ... we waited for assoc but userspace didn't,
3348 * so let's just kill the auth data
3349 */
3350 ieee80211_destroy_auth_data(sdata, false);
3351 } else if (ieee80211_probe_auth(sdata)) {
3352 u8 bssid[ETH_ALEN];
3353
3354 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3355
3356 ieee80211_destroy_auth_data(sdata, false);
3357
3358 mutex_unlock(&ifmgd->mtx);
3359 cfg80211_send_auth_timeout(sdata->dev, bssid);
3360 mutex_lock(&ifmgd->mtx);
3361 }
89afe614 3362 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
66e67e41
JB		 3363 run_again(ifmgd, ifmgd->auth_data->timeout);
3364
89afe614 3365 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
66e67e41 3366 time_after(jiffies, ifmgd->assoc_data->timeout)) {
c65dd147
EG		 3367 if ((ifmgd->assoc_data->need_beacon &&
3368 !ifmgd->assoc_data->have_beacon) ||
66e67e41
JB		 3369 ieee80211_do_assoc(sdata)) {
3370 u8 bssid[ETH_ALEN];
3371
3372 memcpy(bssid, ifmgd->assoc_data->bss->bssid, ETH_ALEN);
3373
3374 ieee80211_destroy_assoc_data(sdata, false);
3375
3376 mutex_unlock(&ifmgd->mtx);
3377 cfg80211_send_assoc_timeout(sdata->dev, bssid);
3378 mutex_lock(&ifmgd->mtx);
3379 }
89afe614 3380 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
66e67e41
JB		 3381 run_again(ifmgd, ifmgd->assoc_data->timeout);
3382
b291ba11
JB		 3383 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
3384 IEEE80211_STA_CONNECTION_POLL) &&
3385 ifmgd->associated) {
a43abf29 3386 u8 bssid[ETH_ALEN];
72a8a3ed 3387 int max_tries;
a43abf29 3388
0c1ad2ca 3389 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 3390
72a8a3ed 3391 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
180205bd 3392 max_tries = max_nullfunc_tries;
72a8a3ed 3393 else
180205bd 3394 max_tries = max_probe_tries;
72a8a3ed 3395
4e5ff376
FF		 3396 /* ACK received for nullfunc probing frame */
3397 if (!ifmgd->probe_send_count)
3398 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 3399 else if (ifmgd->nullfunc_failed) {
3400 if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3401 mlme_dbg(sdata,
3402 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3403 bssid, ifmgd->probe_send_count,
3404 max_tries);
04ac3c0e
FF		 3405 ieee80211_mgd_probe_ap_send(sdata);
3406 } else {
bdcbd8e0
JB		 3407 mlme_dbg(sdata,
3408 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3409 bssid);
95acac61 3410 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1
JB		 3411 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3412 false);
04ac3c0e
FF		 3413 }
3414 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
b291ba11 3415 run_again(ifmgd, ifmgd->probe_timeout);
04ac3c0e 3416 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
bdcbd8e0
JB		 3417 mlme_dbg(sdata,
3418 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3419 bssid, probe_wait_ms);
95acac61 3420 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 3421 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
04ac3c0e 3422 } else if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3423 mlme_dbg(sdata,
3424 "No probe response from AP %pM after %dms, try %d/%i\n",
3425 bssid, probe_wait_ms,
3426 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 3427 ieee80211_mgd_probe_ap_send(sdata);
3428 } else {
b291ba11
JB		 3429 /*
3430 * We actually lost the connection ... or did we?
3431 * Let's make sure!
3432 */
b38afa87
BG		 3433 wiphy_debug(local->hw.wiphy,
3434 "%s: No probe response from AP %pM"
3435 " after %dms, disconnecting.\n",
3436 sdata->name,
180205bd 3437 bssid, probe_wait_ms);
04ac3c0e 3438
95acac61 3439 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 3440 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
b291ba11
JB		 3441 }
3442 }
3443
77fdaa12 3444 mutex_unlock(&ifmgd->mtx);
f0706e82
JB		 3445}
3446
b291ba11
JB		 3447static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3448{
3449 struct ieee80211_sub_if_data *sdata =
3450 (struct ieee80211_sub_if_data *) data;
3451 struct ieee80211_local *local = sdata->local;
3452
3453 if (local->quiescing)
3454 return;
3455
682bd38b 3456 sdata->u.mgd.connection_loss = false;
1e4dcd01
JO		 3457 ieee80211_queue_work(&sdata->local->hw,
3458 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 3459}
3460
3461static void ieee80211_sta_conn_mon_timer(unsigned long data)
3462{
3463 struct ieee80211_sub_if_data *sdata =
3464 (struct ieee80211_sub_if_data *) data;
3465 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3466 struct ieee80211_local *local = sdata->local;
3467
3468 if (local->quiescing)
3469 return;
3470
42935eca 3471 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 3472}
3473
3474static void ieee80211_sta_monitor_work(struct work_struct *work)
3475{
3476 struct ieee80211_sub_if_data *sdata =
3477 container_of(work, struct ieee80211_sub_if_data,
3478 u.mgd.monitor_work);
3479
3480 ieee80211_mgd_probe_ap(sdata, false);
3481}
3482
9c6bd790
JB		 3483static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3484{
494f1fe5
EP		 3485 u32 flags;
3486
ad935687 3487 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
925e64c3 3488 __ieee80211_stop_poll(sdata);
ad935687 3489
b291ba11 3490 /* let's probe the connection once */
494f1fe5
EP		 3491 flags = sdata->local->hw.flags;
3492 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3493 ieee80211_queue_work(&sdata->local->hw,
3494 &sdata->u.mgd.monitor_work);
b291ba11 3495 /* and do all the other regular work too */
64592c8f 3496 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 3497 }
9c6bd790 3498}
f0706e82 3499
5bb644a0
JB		 3500#ifdef CONFIG_PM
3501void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
3502{
3503 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3504
3505 /*
3506 * we need to use atomic bitops for the running bits
3507 * only because both timers might fire at the same
3508 * time -- the code here is properly synchronised.
3509 */
3510
d1f5b7a3
JB		 3511 cancel_work_sync(&ifmgd->request_smps_work);
3512
0ecfe806 3513 cancel_work_sync(&ifmgd->monitor_work);
1e4dcd01 3514 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
882a7c69 3515 cancel_work_sync(&ifmgd->csa_connection_drop_work);
5bb644a0
JB		 3516 if (del_timer_sync(&ifmgd->timer))
3517 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
3518
3519 cancel_work_sync(&ifmgd->chswitch_work);
3520 if (del_timer_sync(&ifmgd->chswitch_timer))
3521 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
b291ba11 3522
b291ba11
JB		 3523 /* these will just be re-established on connection */
3524 del_timer_sync(&ifmgd->conn_mon_timer);
3525 del_timer_sync(&ifmgd->bcn_mon_timer);
5bb644a0
JB		 3526}
3527
3528void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
3529{
3530 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3531
782d2673
JB		 3532 mutex_lock(&ifmgd->mtx);
3533 if (!ifmgd->associated) {
3534 mutex_unlock(&ifmgd->mtx);
676b58c2 3535 return;
782d2673 3536 }
676b58c2 3537
95acac61
JB		 3538 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
3539 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
782d2673
JB		 3540 mlme_dbg(sdata, "driver requested disconnect after resume\n");
3541 ieee80211_sta_connection_lost(sdata,
3542 ifmgd->associated->bssid,
6b684db1
JB		 3543 WLAN_REASON_UNSPECIFIED,
3544 true);
95acac61 3545 mutex_unlock(&ifmgd->mtx);
782d2673 3546 return;
95acac61 3547 }
782d2673 3548 mutex_unlock(&ifmgd->mtx);
95acac61 3549
5bb644a0
JB		 3550 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
3551 add_timer(&ifmgd->timer);
3552 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
3553 add_timer(&ifmgd->chswitch_timer);
c8a7972c 3554 ieee80211_sta_reset_beacon_monitor(sdata);
925e64c3
SG		 3555
3556 mutex_lock(&sdata->local->mtx);
46090979 3557 ieee80211_restart_sta_timer(sdata);
925e64c3 3558 mutex_unlock(&sdata->local->mtx);
5bb644a0
JB		 3559}
3560#endif
3561
9c6bd790
JB		 3562/* interface setup */
3563void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 3564{
46900298 3565 struct ieee80211_if_managed *ifmgd;
988c0f72 3566
46900298 3567 ifmgd = &sdata->u.mgd;
b291ba11 3568 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 3569 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 3570 INIT_WORK(&ifmgd->beacon_connection_loss_work,
3571 ieee80211_beacon_connection_loss_work);
882a7c69
JB		 3572 INIT_WORK(&ifmgd->csa_connection_drop_work,
3573 ieee80211_csa_connection_drop_work);
d1f5b7a3 3574 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
46900298 3575 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 3576 (unsigned long) sdata);
b291ba11
JB		 3577 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
3578 (unsigned long) sdata);
3579 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
3580 (unsigned long) sdata);
46900298 3581 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 3582 (unsigned long) sdata);
9c6bd790 3583
ab1faead 3584 ifmgd->flags = 0;
1478acb3 3585 ifmgd->powersave = sdata->wdev.ps;
dc41e4d4
EP		 3586 ifmgd->uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
3587 ifmgd->uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
bbbdff9e 3588
77fdaa12 3589 mutex_init(&ifmgd->mtx);
0f78231b
JB		 3590
3591 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
3592 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
3593 else
3594 ifmgd->req_smps = IEEE80211_SMPS_OFF;
f0706e82
JB		 3595}
3596
77fdaa12
JB		 3597/* scan finished notification */
3598void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 3599{
31ee67a1 3600 struct ieee80211_sub_if_data *sdata;
60f8b39c 3601
77fdaa12
JB		 3602 /* Restart STA timers */
3603 rcu_read_lock();
3604 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3605 ieee80211_restart_sta_timer(sdata);
3606 rcu_read_unlock();
3607}
60f8b39c 3608
77fdaa12
JB		 3609int ieee80211_max_network_latency(struct notifier_block *nb,
3610 unsigned long data, void *dummy)
3611{
3612 s32 latency_usec = (s32) data;
3613 struct ieee80211_local *local =
3614 container_of(nb, struct ieee80211_local,
3615 network_latency_notifier);
1fa6f4af 3616
77fdaa12
JB		 3617 mutex_lock(&local->iflist_mtx);
3618 ieee80211_recalc_ps(local, latency_usec);
3619 mutex_unlock(&local->iflist_mtx);
dfe67012 3620
77fdaa12 3621 return 0;
9c6bd790
JB		 3622}
3623
f2d9d270
JB		 3624static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
3625 struct cfg80211_bss *cbss)
3626{
3627 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3628 const u8 *ht_cap_ie, *vht_cap_ie;
3629 const struct ieee80211_ht_cap *ht_cap;
3630 const struct ieee80211_vht_cap *vht_cap;
3631 u8 chains = 1;
3632
3633 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
3634 return chains;
3635
9caf0364 3636 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
f2d9d270
JB		 3637 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
3638 ht_cap = (void *)(ht_cap_ie + 2);
3639 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
3640 /*
3641 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
3642 * "Tx Unequal Modulation Supported" fields.
3643 */
3644 }
3645
3646 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
3647 return chains;
3648
9caf0364 3649 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
f2d9d270
JB		 3650 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
3651 u8 nss;
3652 u16 tx_mcs_map;
3653
3654 vht_cap = (void *)(vht_cap_ie + 2);
3655 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
3656 for (nss = 8; nss > 0; nss--) {
3657 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
3658 IEEE80211_VHT_MCS_NOT_SUPPORTED)
3659 break;
3660 }
3661 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
3662 chains = max(chains, nss);
3663 }
3664
3665 return chains;
3666}
3667
b17166a7
JB		 3668static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
3669 struct cfg80211_bss *cbss)
a1cf775d
JB		 3670{
3671 struct ieee80211_local *local = sdata->local;
3672 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
24398e39 3673 const struct ieee80211_ht_operation *ht_oper = NULL;
f2d9d270 3674 const struct ieee80211_vht_operation *vht_oper = NULL;
24398e39 3675 struct ieee80211_supported_band *sband;
4bf88530 3676 struct cfg80211_chan_def chandef;
f2d9d270 3677 int ret;
a1cf775d 3678
24398e39
JB		 3679 sband = local->hw.wiphy->bands[cbss->channel->band];
3680
f2d9d270
JB		 3681 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
3682 IEEE80211_STA_DISABLE_80P80MHZ |
3683 IEEE80211_STA_DISABLE_160MHZ);
3684
9caf0364
JB		 3685 rcu_read_lock();
3686
f2d9d270
JB		 3687 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3688 sband->ht_cap.ht_supported) {
08e6effa 3689 const u8 *ht_oper_ie, *ht_cap;
24398e39 3690
9caf0364 3691 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
24398e39
JB		 3692 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3693 ht_oper = (void *)(ht_oper_ie + 2);
08e6effa
JB		 3694
3695 ht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
3696 if (!ht_cap || ht_cap[1] < sizeof(struct ieee80211_ht_cap)) {
3697 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3698 ht_oper = NULL;
3699 }
24398e39
JB		 3700 }
3701
f2d9d270
JB		 3702 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3703 sband->vht_cap.vht_supported) {
08e6effa 3704 const u8 *vht_oper_ie, *vht_cap;
f2d9d270 3705
9caf0364
JB		 3706 vht_oper_ie = ieee80211_bss_get_ie(cbss,
3707 WLAN_EID_VHT_OPERATION);
f2d9d270
JB		 3708 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
3709 vht_oper = (void *)(vht_oper_ie + 2);
3710 if (vht_oper && !ht_oper) {
3711 vht_oper = NULL;
bdcbd8e0 3712 sdata_info(sdata,
f2d9d270 3713 "AP advertised VHT without HT, disabling both\n");
cb145022
JB		 3714 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3715 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
24398e39 3716 }
08e6effa
JB		 3717
3718 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
3719 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
3720 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3721 vht_oper = NULL;
3722 }
24398e39
JB		 3723 }
3724
f2d9d270
JB		 3725 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
3726 cbss->channel,
3727 ht_oper, vht_oper,
30eb1dc2 3728 &chandef, true);
04ecd257 3729
f2d9d270
JB		 3730 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
3731 local->rx_chains);
24398e39 3732
9caf0364
JB		 3733 rcu_read_unlock();
3734
04ecd257
JB		 3735 /* will change later if needed */
3736 sdata->smps_mode = IEEE80211_SMPS_OFF;
3737
f2d9d270
JB		 3738 /*
3739 * If this fails (possibly due to channel context sharing
3740 * on incompatible channels, e.g. 80+80 and 160 sharing the
3741 * same control channel) try to use a smaller bandwidth.
3742 */
3743 ret = ieee80211_vif_use_channel(sdata, &chandef,
3744 IEEE80211_CHANCTX_SHARED);
d601cd8d 3745 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
f2d9d270 3746 ifmgd->flags |= chandef_downgrade(&chandef);
d601cd8d
JB		 3747 ret = ieee80211_vif_use_channel(sdata, &chandef,
3748 IEEE80211_CHANCTX_SHARED);
3749 }
f2d9d270 3750 return ret;
b17166a7
JB		 3751}
3752
3753static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
3754 struct cfg80211_bss *cbss, bool assoc)
3755{
3756 struct ieee80211_local *local = sdata->local;
3757 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3758 struct ieee80211_bss *bss = (void *)cbss->priv;
3759 struct sta_info *new_sta = NULL;
3760 bool have_sta = false;
3761 int err;
3762
3763 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3764 return -EINVAL;
3765
3766 if (assoc) {
3767 rcu_read_lock();
3768 have_sta = sta_info_get(sdata, cbss->bssid);
3769 rcu_read_unlock();
3770 }
3771
3772 if (!have_sta) {
3773 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
3774 if (!new_sta)
3775 return -ENOMEM;
3776 }
3777
13e0c8e3 3778 if (new_sta) {
5d6a1b06
JB		 3779 u32 rates = 0, basic_rates = 0;
3780 bool have_higher_than_11mbit;
3781 int min_rate = INT_MAX, min_rate_index = -1;
b17166a7 3782 struct ieee80211_supported_band *sband;
8cef2c9d 3783 const struct cfg80211_bss_ies *ies;
b17166a7
JB		 3784
3785 sband = local->hw.wiphy->bands[cbss->channel->band];
3786
3787 err = ieee80211_prep_channel(sdata, cbss);
3788 if (err) {
3789 sta_info_free(local, new_sta);
3790 return err;
3791 }
5d6a1b06 3792
5d6a1b06
JB		 3793 ieee80211_get_rates(sband, bss->supp_rates,
3794 bss->supp_rates_len,
3795 &rates, &basic_rates,
3796 &have_higher_than_11mbit,
3797 &min_rate, &min_rate_index);
3798
3799 /*
3800 * This used to be a workaround for basic rates missing
3801 * in the association response frame. Now that we no
3802 * longer use the basic rates from there, it probably
3803 * doesn't happen any more, but keep the workaround so
3804 * in case some *other* APs are buggy in different ways
3805 * we can connect -- with a warning.
3806 */
3807 if (!basic_rates && min_rate_index >= 0) {
bdcbd8e0
JB		 3808 sdata_info(sdata,
3809 "No basic rates, using min rate instead\n");
5d6a1b06
JB		 3810 basic_rates = BIT(min_rate_index);
3811 }
3812
13e0c8e3 3813 new_sta->sta.supp_rates[cbss->channel->band] = rates;
5d6a1b06
JB		 3814 sdata->vif.bss_conf.basic_rates = basic_rates;
3815
3816 /* cf. IEEE 802.11 9.2.12 */
55de908a 3817 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
5d6a1b06
JB		 3818 have_higher_than_11mbit)
3819 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3820 else
3821 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
3822
3823 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
3824
8c358bcd
JB		 3825 /* set timing information */
3826 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
8cef2c9d 3827 rcu_read_lock();
ef429dad
JB		 3828 ies = rcu_dereference(cbss->beacon_ies);
3829 if (ies) {
3830 const u8 *tim_ie;
3831
3832 sdata->vif.bss_conf.sync_tsf = ies->tsf;
3833 sdata->vif.bss_conf.sync_device_ts =
3834 bss->device_ts_beacon;
3835 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
3836 ies->data, ies->len);
3837 if (tim_ie && tim_ie[1] >= 2)
3838 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
3839 else
3840 sdata->vif.bss_conf.sync_dtim_count = 0;
3841 } else if (!(local->hw.flags &
3842 IEEE80211_HW_TIMING_BEACON_ONLY)) {
3843 ies = rcu_dereference(cbss->proberesp_ies);
3844 /* must be non-NULL since beacon IEs were NULL */
3845 sdata->vif.bss_conf.sync_tsf = ies->tsf;
3846 sdata->vif.bss_conf.sync_device_ts =
3847 bss->device_ts_presp;
3848 sdata->vif.bss_conf.sync_dtim_count = 0;
3849 } else {
3850 sdata->vif.bss_conf.sync_tsf = 0;
3851 sdata->vif.bss_conf.sync_device_ts = 0;
3852 sdata->vif.bss_conf.sync_dtim_count = 0;
3853 }
8cef2c9d 3854 rcu_read_unlock();
8c358bcd
JB		 3855
3856 /* tell driver about BSSID, basic rates and timing */
5d6a1b06 3857 ieee80211_bss_info_change_notify(sdata,
8c358bcd
JB		 3858 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
3859 BSS_CHANGED_BEACON_INT);
a1cf775d
JB		 3860
3861 if (assoc)
13e0c8e3 3862 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
a1cf775d 3863
13e0c8e3
JB		 3864 err = sta_info_insert(new_sta);
3865 new_sta = NULL;
a1cf775d 3866 if (err) {
bdcbd8e0
JB		 3867 sdata_info(sdata,
3868 "failed to insert STA entry for the AP (error %d)\n",
3869 err);
a1cf775d
JB		 3870 return err;
3871 }
3872 } else
b203ca39 3873 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
a1cf775d
JB		 3874
3875 return 0;
3876}
3877
77fdaa12
JB		 3878/* config hooks */
3879int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
3880 struct cfg80211_auth_request *req)
9c6bd790 3881{
66e67e41
JB		 3882 struct ieee80211_local *local = sdata->local;
3883 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3884 struct ieee80211_mgd_auth_data *auth_data;
77fdaa12 3885 u16 auth_alg;
66e67e41
JB		 3886 int err;
3887
3888 /* prepare auth data structure */
9c6bd790 3889
77fdaa12
JB		 3890 switch (req->auth_type) {
3891 case NL80211_AUTHTYPE_OPEN_SYSTEM:
3892 auth_alg = WLAN_AUTH_OPEN;
3893 break;
3894 case NL80211_AUTHTYPE_SHARED_KEY:
66e67e41 3895 if (IS_ERR(local->wep_tx_tfm))
9dca9c49 3896 return -EOPNOTSUPP;
77fdaa12
JB		 3897 auth_alg = WLAN_AUTH_SHARED_KEY;
3898 break;
3899 case NL80211_AUTHTYPE_FT:
3900 auth_alg = WLAN_AUTH_FT;
3901 break;
3902 case NL80211_AUTHTYPE_NETWORK_EAP:
3903 auth_alg = WLAN_AUTH_LEAP;
3904 break;
6b8ece3a
JM		 3905 case NL80211_AUTHTYPE_SAE:
3906 auth_alg = WLAN_AUTH_SAE;
3907 break;
77fdaa12
JB		 3908 default:
3909 return -EOPNOTSUPP;
60f8b39c 3910 }
77fdaa12 3911
6b8ece3a
JM		 3912 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
3913 req->ie_len, GFP_KERNEL);
66e67e41 3914 if (!auth_data)
9c6bd790 3915 return -ENOMEM;
77fdaa12 3916
66e67e41 3917 auth_data->bss = req->bss;
77fdaa12 3918
6b8ece3a
JM		 3919 if (req->sae_data_len >= 4) {
3920 __le16 *pos = (__le16 *) req->sae_data;
3921 auth_data->sae_trans = le16_to_cpu(pos[0]);
3922 auth_data->sae_status = le16_to_cpu(pos[1]);
3923 memcpy(auth_data->data, req->sae_data + 4,
3924 req->sae_data_len - 4);
3925 auth_data->data_len += req->sae_data_len - 4;
3926 }
3927
77fdaa12 3928 if (req->ie && req->ie_len) {
6b8ece3a
JM		 3929 memcpy(&auth_data->data[auth_data->data_len],
3930 req->ie, req->ie_len);
3931 auth_data->data_len += req->ie_len;
9c6bd790 3932 }
77fdaa12 3933
fffd0934 3934 if (req->key && req->key_len) {
66e67e41
JB		 3935 auth_data->key_len = req->key_len;
3936 auth_data->key_idx = req->key_idx;
3937 memcpy(auth_data->key, req->key, req->key_len);
fffd0934
JB		 3938 }
3939
66e67e41 3940 auth_data->algorithm = auth_alg;
60f8b39c 3941
66e67e41 3942 /* try to authenticate/probe */
2a33bee2 3943
66e67e41 3944 mutex_lock(&ifmgd->mtx);
2a33bee2 3945
66e67e41
JB		 3946 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
3947 ifmgd->assoc_data) {
3948 err = -EBUSY;
3949 goto err_free;
2a33bee2
GE		 3950 }
3951
66e67e41
JB		 3952 if (ifmgd->auth_data)
3953 ieee80211_destroy_auth_data(sdata, false);
2a33bee2 3954
66e67e41
JB		 3955 /* prep auth_data so we don't go into idle on disassoc */
3956 ifmgd->auth_data = auth_data;
af6b6374 3957
66e67e41 3958 if (ifmgd->associated)
37ad3888 3959 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
af6b6374 3960
bdcbd8e0 3961 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
e5b900d2 3962
a1cf775d
JB		 3963 err = ieee80211_prep_connection(sdata, req->bss, false);
3964 if (err)
66e67e41 3965 goto err_clear;
af6b6374 3966
66e67e41
JB		 3967 err = ieee80211_probe_auth(sdata);
3968 if (err) {
66e67e41
JB		 3969 sta_info_destroy_addr(sdata, req->bss->bssid);
3970 goto err_clear;
3971 }
3972
3973 /* hold our own reference */
5b112d3d 3974 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
66e67e41
JB		 3975 err = 0;
3976 goto out_unlock;
3977
3978 err_clear:
3d2abdfd
EP		 3979 memset(ifmgd->bssid, 0, ETH_ALEN);
3980 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 3981 ifmgd->auth_data = NULL;
3982 err_free:
3983 kfree(auth_data);
3984 out_unlock:
3985 mutex_unlock(&ifmgd->mtx);
b2abb6e2 3986
66e67e41 3987 return err;
af6b6374
JB		 3988}
3989
77fdaa12
JB		 3990int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
3991 struct cfg80211_assoc_request *req)
f0706e82 3992{
66e67e41 3993 struct ieee80211_local *local = sdata->local;
77fdaa12 3994 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 3995 struct ieee80211_bss *bss = (void *)req->bss->priv;
66e67e41 3996 struct ieee80211_mgd_assoc_data *assoc_data;
c65dd147 3997 const struct cfg80211_bss_ies *beacon_ies;
4e74bfdb 3998 struct ieee80211_supported_band *sband;
b08fbbd8 3999 const u8 *ssidie, *ht_ie, *vht_ie;
2a33bee2 4000 int i, err;
f0706e82 4001
66e67e41
JB		 4002 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4003 if (!assoc_data)
4004 return -ENOMEM;
4005
9caf0364
JB		 4006 rcu_read_lock();
4007 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4008 if (!ssidie) {
4009 rcu_read_unlock();
4010 kfree(assoc_data);
4011 return -EINVAL;
4012 }
4013 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4014 assoc_data->ssid_len = ssidie[1];
4015 rcu_read_unlock();
4016
77fdaa12 4017 mutex_lock(&ifmgd->mtx);
9c87ba67 4018
66e67e41 4019 if (ifmgd->associated)
37ad3888 4020 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
66e67e41
JB		 4021
4022 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4023 err = -EBUSY;
4024 goto err_free;
af6b6374 4025 }
77fdaa12 4026
66e67e41
JB		 4027 if (ifmgd->assoc_data) {
4028 err = -EBUSY;
4029 goto err_free;
4030 }
77fdaa12 4031
66e67e41
JB		 4032 if (ifmgd->auth_data) {
4033 bool match;
4034
4035 /* keep sta info, bssid if matching */
b203ca39 4036 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
66e67e41 4037 ieee80211_destroy_auth_data(sdata, match);
2a33bee2
GE		 4038 }
4039
66e67e41 4040 /* prepare assoc data */
19c3b830 4041
d8ec4433
JO		 4042 ifmgd->beacon_crc_valid = false;
4043
de5036aa
JB		 4044 /*
4045 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4046 * We still associate in non-HT mode (11a/b/g) if any one of these
4047 * ciphers is configured as pairwise.
4048 * We can set this to true for non-11n hardware, that'll be checked
4049 * separately along with the peer capabilities.
4050 */
1c4cb928 4051 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
77fdaa12
JB		 4052 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4053 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
1c4cb928 4054 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
a8243b72 4055 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
d545daba 4056 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
1c4cb928 4057 netdev_info(sdata->dev,
d545daba 4058 "disabling HT/VHT due to WEP/TKIP use\n");
1c4cb928
JB		 4059 }
4060 }
77fdaa12 4061
d545daba 4062 if (req->flags & ASSOC_REQ_DISABLE_HT) {
a8243b72 4063 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
d545daba
MP		 4064 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4065 }
ef96a842 4066
4e74bfdb
JB		 4067 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4068 sband = local->hw.wiphy->bands[req->bss->channel->band];
4069 if (!sband->ht_cap.ht_supported ||
1c4cb928 4070 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
a8243b72 4071 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
1b49de26
JB		 4072 if (!bss->wmm_used)
4073 netdev_info(sdata->dev,
4074 "disabling HT as WMM/QoS is not supported by the AP\n");
1c4cb928 4075 }
4e74bfdb 4076
d545daba
MP		 4077 /* disable VHT if we don't support it or the AP doesn't use WMM */
4078 if (!sband->vht_cap.vht_supported ||
4079 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
4080 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
1b49de26
JB		 4081 if (!bss->wmm_used)
4082 netdev_info(sdata->dev,
4083 "disabling VHT as WMM/QoS is not supported by the AP\n");
d545daba
MP		 4084 }
4085
ef96a842
BG		 4086 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4087 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4088 sizeof(ifmgd->ht_capa_mask));
4089
77fdaa12 4090 if (req->ie && req->ie_len) {
66e67e41
JB		 4091 memcpy(assoc_data->ie, req->ie, req->ie_len);
4092 assoc_data->ie_len = req->ie_len;
4093 }
f679f65d 4094
66e67e41 4095 assoc_data->bss = req->bss;
f679f65d 4096
af6b6374
JB		 4097 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4098 if (ifmgd->powersave)
04ecd257 4099 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
af6b6374 4100 else
04ecd257 4101 sdata->smps_mode = IEEE80211_SMPS_OFF;
af6b6374 4102 } else
04ecd257 4103 sdata->smps_mode = ifmgd->req_smps;
af6b6374 4104
66e67e41 4105 assoc_data->capability = req->bss->capability;
32c5057b
JB		 4106 assoc_data->wmm = bss->wmm_used &&
4107 (local->hw.queues >= IEEE80211_NUM_ACS);
66e67e41
JB		 4108 assoc_data->supp_rates = bss->supp_rates;
4109 assoc_data->supp_rates_len = bss->supp_rates_len;
9dde6423 4110
9caf0364 4111 rcu_read_lock();
9dde6423
JB		 4112 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4113 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4114 assoc_data->ap_ht_param =
4115 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4116 else
a8243b72 4117 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
b08fbbd8
JB		 4118 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4119 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4120 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4121 sizeof(struct ieee80211_vht_cap));
4122 else
4123 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
9caf0364 4124 rcu_read_unlock();
63f170e0 4125
ab13315a
KV		 4126 if (bss->wmm_used && bss->uapsd_supported &&
4127 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
76f0303d 4128 assoc_data->uapsd = true;
ab13315a
KV		 4129 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4130 } else {
76f0303d 4131 assoc_data->uapsd = false;
ab13315a
KV		 4132 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4133 }
4134
77fdaa12 4135 if (req->prev_bssid)
66e67e41 4136 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12
JB		 4137
4138 if (req->use_mfp) {
4139 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4140 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4141 } else {
4142 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4143 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4144 }
4145
4146 if (req->crypto.control_port)
4147 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4148 else
4149 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4150
a621fa4d
JB		 4151 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4152 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4153
66e67e41
JB		 4154 /* kick off associate process */
4155
4156 ifmgd->assoc_data = assoc_data;
826262c3 4157 ifmgd->dtim_period = 0;
66e67e41 4158
a1cf775d
JB		 4159 err = ieee80211_prep_connection(sdata, req->bss, true);
4160 if (err)
4161 goto err_clear;
66e67e41 4162
c65dd147
EG		 4163 rcu_read_lock();
4164 beacon_ies = rcu_dereference(req->bss->beacon_ies);
826262c3 4165
c65dd147
EG		 4166 if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC &&
4167 !beacon_ies) {
4168 /*
4169 * Wait up to one beacon interval ...
4170 * should this be more if we miss one?
4171 */
4172 sdata_info(sdata, "waiting for beacon from %pM\n",
4173 ifmgd->bssid);
4174 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
89afe614 4175 assoc_data->timeout_started = true;
c65dd147
EG		 4176 assoc_data->need_beacon = true;
4177 } else if (beacon_ies) {
4178 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4179 beacon_ies->data,
4180 beacon_ies->len);
ef429dad
JB		 4181 u8 dtim_count = 0;
4182
c65dd147
EG		 4183 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4184 const struct ieee80211_tim_ie *tim;
4185 tim = (void *)(tim_ie + 2);
4186 ifmgd->dtim_period = tim->dtim_period;
ef429dad 4187 dtim_count = tim->dtim_count;
826262c3 4188 }
66e67e41 4189 assoc_data->have_beacon = true;
66e67e41 4190 assoc_data->timeout = jiffies;
89afe614 4191 assoc_data->timeout_started = true;
ef429dad
JB		 4192
4193 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
4194 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4195 sdata->vif.bss_conf.sync_device_ts =
4196 bss->device_ts_beacon;
4197 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4198 }
c65dd147
EG		 4199 } else {
4200 assoc_data->timeout = jiffies;
89afe614 4201 assoc_data->timeout_started = true;
66e67e41 4202 }
c65dd147
EG		 4203 rcu_read_unlock();
4204
66e67e41
JB		 4205 run_again(ifmgd, assoc_data->timeout);
4206
fcff4f10
PS		 4207 if (bss->corrupt_data) {
4208 char *corrupt_type = "data";
4209 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4210 if (bss->corrupt_data &
4211 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4212 corrupt_type = "beacon and probe response";
4213 else
4214 corrupt_type = "beacon";
4215 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4216 corrupt_type = "probe response";
bdcbd8e0
JB		 4217 sdata_info(sdata, "associating with AP with corrupt %s\n",
4218 corrupt_type);
fcff4f10
PS		 4219 }
4220
66e67e41
JB		 4221 err = 0;
4222 goto out;
4223 err_clear:
3d2abdfd
EP		 4224 memset(ifmgd->bssid, 0, ETH_ALEN);
4225 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 4226 ifmgd->assoc_data = NULL;
4227 err_free:
4228 kfree(assoc_data);
4229 out:
4230 mutex_unlock(&ifmgd->mtx);
4231
4232 return err;
f0706e82
JB		 4233}
4234
77fdaa12 4235int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
63c9c5e7 4236 struct cfg80211_deauth_request *req)
f0706e82 4237{
46900298 4238 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 4239 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
6863255b 4240 bool tx = !req->local_state_change;
86552017 4241 bool sent_frame = false;
f0706e82 4242
77fdaa12
JB		 4243 mutex_lock(&ifmgd->mtx);
4244
bdcbd8e0
JB		 4245 sdata_info(sdata,
4246 "deauthenticating from %pM by local choice (reason=%d)\n",
4247 req->bssid, req->reason_code);
0ff71613 4248
86552017 4249 if (ifmgd->auth_data) {
8c7d857c 4250 drv_mgd_prepare_tx(sdata->local, sdata);
37ad3888
JB		 4251 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4252 IEEE80211_STYPE_DEAUTH,
6863255b 4253 req->reason_code, tx,
37ad3888 4254 frame_buf);
86552017
JB		 4255 ieee80211_destroy_auth_data(sdata, false);
4256 mutex_unlock(&ifmgd->mtx);
4257
4258 sent_frame = tx;
4259 goto out;
8c7d857c
EG		 4260 }
4261
86552017
JB		 4262 if (ifmgd->associated &&
4263 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
4264 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4265 req->reason_code, tx, frame_buf);
4266 sent_frame = tx;
4267 }
37ad3888
JB		 4268 mutex_unlock(&ifmgd->mtx);
4269
86552017 4270 out:
86552017
JB		 4271 if (sent_frame)
4272 __cfg80211_send_deauth(sdata->dev, frame_buf,
4273 IEEE80211_DEAUTH_FRAME_LEN);
4274
f0706e82
JB		 4275 return 0;
4276}
84363e6e 4277
77fdaa12 4278int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 4279 struct cfg80211_disassoc_request *req)
9c6bd790 4280{
77fdaa12 4281 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 4282 u8 bssid[ETH_ALEN];
6ae16775 4283 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
9c6bd790 4284
77fdaa12 4285 mutex_lock(&ifmgd->mtx);
10f644a4 4286
8d8b261a
JB		 4287 /*
4288 * cfg80211 should catch this ... but it's racy since
4289 * we can receive a disassoc frame, process it, hand it
4290 * to cfg80211 while that's in a locked section already
4291 * trying to tell us that the user wants to disconnect.
4292 */
0c1ad2ca 4293 if (ifmgd->associated != req->bss) {
77fdaa12
JB		 4294 mutex_unlock(&ifmgd->mtx);
4295 return -ENOLINK;
4296 }
4297
bdcbd8e0
JB		 4298 sdata_info(sdata,
4299 "disassociating from %pM by local choice (reason=%d)\n",
4300 req->bss->bssid, req->reason_code);
0ff71613 4301
e69e95db 4302 memcpy(bssid, req->bss->bssid, ETH_ALEN);
37ad3888
JB		 4303 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4304 req->reason_code, !req->local_state_change,
4305 frame_buf);
77fdaa12 4306 mutex_unlock(&ifmgd->mtx);
10f644a4 4307
6ae16775
AQ		 4308 __cfg80211_send_disassoc(sdata->dev, frame_buf,
4309 IEEE80211_DEAUTH_FRAME_LEN);
bc83b681 4310
10f644a4
JB		 4311 return 0;
4312}
026331c4 4313
afa762f6 4314void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
54e4ffb2
JB		 4315{
4316 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4317
4318 mutex_lock(&ifmgd->mtx);
4319 if (ifmgd->assoc_data)
4320 ieee80211_destroy_assoc_data(sdata, false);
4321 if (ifmgd->auth_data)
4322 ieee80211_destroy_auth_data(sdata, false);
4323 del_timer_sync(&ifmgd->timer);
4324 mutex_unlock(&ifmgd->mtx);
4325}
4326
a97c13c3
JO		 4327void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
4328 enum nl80211_cqm_rssi_threshold_event rssi_event,
4329 gfp_t gfp)
4330{
4331 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4332
b5878a2d
JB		 4333 trace_api_cqm_rssi_notify(sdata, rssi_event);
4334
a97c13c3
JO		 4335 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
4336}
4337EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
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