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ssb: implement spurious tone avoidance
[GitHub/mt8127/android_kernel_alcatel_ttab.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
24af717c
JB		 650 if (our_mcs == IEEE80211_VHT_MCS_NOT_SUPPORTED)
651 continue;
652
b08fbbd8
JB		 653 switch (ap_mcs) {
654 default:
655 if (our_mcs <= ap_mcs)
656 break;
657 /* fall through */
658 case IEEE80211_VHT_MCS_NOT_SUPPORTED:
659 vht_cap.vht_mcs.rx_mcs_map &= cpu_to_le16(~mask);
660 vht_cap.vht_mcs.rx_mcs_map |=
661 cpu_to_le16(ap_mcs << shift);
662 }
663 }
664
d545daba 665 /* reserve and fill IE */
d4950281 666 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
d545daba
MP		 667 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
668}
669
66e67e41
JB		 670static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
671{
672 struct ieee80211_local *local = sdata->local;
673 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
674 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
675 struct sk_buff *skb;
676 struct ieee80211_mgmt *mgmt;
677 u8 *pos, qos_info;
678 size_t offset = 0, noffset;
679 int i, count, rates_len, supp_rates_len;
680 u16 capab;
681 struct ieee80211_supported_band *sband;
55de908a
JB		 682 struct ieee80211_chanctx_conf *chanctx_conf;
683 struct ieee80211_channel *chan;
66e67e41 684 u32 rates = 0;
66e67e41
JB		 685
686 lockdep_assert_held(&ifmgd->mtx);
687
55de908a
JB		 688 rcu_read_lock();
689 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
690 if (WARN_ON(!chanctx_conf)) {
691 rcu_read_unlock();
692 return;
693 }
4bf88530 694 chan = chanctx_conf->def.chan;
55de908a
JB		 695 rcu_read_unlock();
696 sband = local->hw.wiphy->bands[chan->band];
66e67e41
JB		 697
698 if (assoc_data->supp_rates_len) {
699 /*
700 * Get all rates supported by the device and the AP as
701 * some APs don't like getting a superset of their rates
702 * in the association request (e.g. D-Link DAP 1353 in
703 * b-only mode)...
704 */
705 rates_len = ieee80211_compatible_rates(assoc_data->supp_rates,
706 assoc_data->supp_rates_len,
707 sband, &rates);
708 } else {
709 /*
710 * In case AP not provide any supported rates information
711 * before association, we send information element(s) with
712 * all rates that we support.
713 */
714 rates = ~0;
715 rates_len = sband->n_bitrates;
716 }
717
718 skb = alloc_skb(local->hw.extra_tx_headroom +
719 sizeof(*mgmt) + /* bit too much but doesn't matter */
720 2 + assoc_data->ssid_len + /* SSID */
721 4 + rates_len + /* (extended) rates */
722 4 + /* power capability */
723 2 + 2 * sband->n_channels + /* supported channels */
724 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
d4950281 725 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
66e67e41
JB		 726 assoc_data->ie_len + /* extra IEs */
727 9, /* WMM */
728 GFP_KERNEL);
729 if (!skb)
730 return;
731
732 skb_reserve(skb, local->hw.extra_tx_headroom);
733
734 capab = WLAN_CAPABILITY_ESS;
735
736 if (sband->band == IEEE80211_BAND_2GHZ) {
737 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
738 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
739 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
740 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
741 }
742
743 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
744 capab |= WLAN_CAPABILITY_PRIVACY;
745
746 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
747 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
748 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
749
750 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
751 memset(mgmt, 0, 24);
752 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
753 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
754 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
755
756 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
757 skb_put(skb, 10);
758 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
759 IEEE80211_STYPE_REASSOC_REQ);
760 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
761 mgmt->u.reassoc_req.listen_interval =
762 cpu_to_le16(local->hw.conf.listen_interval);
763 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
764 ETH_ALEN);
765 } else {
766 skb_put(skb, 4);
767 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
768 IEEE80211_STYPE_ASSOC_REQ);
769 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
770 mgmt->u.assoc_req.listen_interval =
771 cpu_to_le16(local->hw.conf.listen_interval);
772 }
773
774 /* SSID */
775 pos = skb_put(skb, 2 + assoc_data->ssid_len);
776 *pos++ = WLAN_EID_SSID;
777 *pos++ = assoc_data->ssid_len;
778 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
779
780 /* add all rates which were marked to be used above */
781 supp_rates_len = rates_len;
782 if (supp_rates_len > 8)
783 supp_rates_len = 8;
784
785 pos = skb_put(skb, supp_rates_len + 2);
786 *pos++ = WLAN_EID_SUPP_RATES;
787 *pos++ = supp_rates_len;
788
789 count = 0;
790 for (i = 0; i < sband->n_bitrates; i++) {
791 if (BIT(i) & rates) {
792 int rate = sband->bitrates[i].bitrate;
793 *pos++ = (u8) (rate / 5);
794 if (++count == 8)
795 break;
796 }
797 }
798
799 if (rates_len > count) {
800 pos = skb_put(skb, rates_len - count + 2);
801 *pos++ = WLAN_EID_EXT_SUPP_RATES;
802 *pos++ = rates_len - count;
803
804 for (i++; i < sband->n_bitrates; i++) {
805 if (BIT(i) & rates) {
806 int rate = sband->bitrates[i].bitrate;
807 *pos++ = (u8) (rate / 5);
808 }
809 }
810 }
811
812 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
813 /* 1. power capabilities */
814 pos = skb_put(skb, 4);
815 *pos++ = WLAN_EID_PWR_CAPABILITY;
816 *pos++ = 2;
817 *pos++ = 0; /* min tx power */
55de908a 818 *pos++ = chan->max_power; /* max tx power */
66e67e41
JB		 819
820 /* 2. supported channels */
821 /* TODO: get this in reg domain format */
822 pos = skb_put(skb, 2 * sband->n_channels + 2);
823 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
824 *pos++ = 2 * sband->n_channels;
825 for (i = 0; i < sband->n_channels; i++) {
826 *pos++ = ieee80211_frequency_to_channel(
827 sband->channels[i].center_freq);
828 *pos++ = 1; /* one channel in the subband*/
829 }
830 }
831
832 /* if present, add any custom IEs that go before HT */
833 if (assoc_data->ie_len && assoc_data->ie) {
834 static const u8 before_ht[] = {
835 WLAN_EID_SSID,
836 WLAN_EID_SUPP_RATES,
837 WLAN_EID_EXT_SUPP_RATES,
838 WLAN_EID_PWR_CAPABILITY,
839 WLAN_EID_SUPPORTED_CHANNELS,
840 WLAN_EID_RSN,
841 WLAN_EID_QOS_CAPA,
842 WLAN_EID_RRM_ENABLED_CAPABILITIES,
843 WLAN_EID_MOBILITY_DOMAIN,
844 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
845 };
846 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
847 before_ht, ARRAY_SIZE(before_ht),
848 offset);
849 pos = skb_put(skb, noffset - offset);
850 memcpy(pos, assoc_data->ie + offset, noffset - offset);
851 offset = noffset;
852 }
853
f2d9d270
JB		 854 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
855 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
856 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
857
a8243b72 858 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
9dde6423 859 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
04ecd257 860 sband, chan, sdata->smps_mode);
66e67e41 861
d545daba 862 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
b08fbbd8
JB		 863 ieee80211_add_vht_ie(sdata, skb, sband,
864 &assoc_data->ap_vht_cap);
d545daba 865
66e67e41
JB		 866 /* if present, add any custom non-vendor IEs that go after HT */
867 if (assoc_data->ie_len && assoc_data->ie) {
868 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
869 assoc_data->ie_len,
870 offset);
871 pos = skb_put(skb, noffset - offset);
872 memcpy(pos, assoc_data->ie + offset, noffset - offset);
873 offset = noffset;
874 }
875
76f0303d
JB		 876 if (assoc_data->wmm) {
877 if (assoc_data->uapsd) {
dc41e4d4
EP		 878 qos_info = ifmgd->uapsd_queues;
879 qos_info |= (ifmgd->uapsd_max_sp_len <<
66e67e41
JB		 880 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
881 } else {
882 qos_info = 0;
883 }
884
885 pos = skb_put(skb, 9);
886 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
887 *pos++ = 7; /* len */
888 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
889 *pos++ = 0x50;
890 *pos++ = 0xf2;
891 *pos++ = 2; /* WME */
892 *pos++ = 0; /* WME info */
893 *pos++ = 1; /* WME ver */
894 *pos++ = qos_info;
895 }
896
897 /* add any remaining custom (i.e. vendor specific here) IEs */
898 if (assoc_data->ie_len && assoc_data->ie) {
899 noffset = assoc_data->ie_len;
900 pos = skb_put(skb, noffset - offset);
901 memcpy(pos, assoc_data->ie + offset, noffset - offset);
902 }
903
a1845fc7
JB		 904 drv_mgd_prepare_tx(local, sdata);
905
66e67e41 906 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1672c0e3
JB		 907 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
908 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
909 IEEE80211_TX_INTFL_MLME_CONN_TX;
66e67e41
JB		 910 ieee80211_tx_skb(sdata, skb);
911}
912
572e0012
KV		 913void ieee80211_send_pspoll(struct ieee80211_local *local,
914 struct ieee80211_sub_if_data *sdata)
915{
572e0012
KV		 916 struct ieee80211_pspoll *pspoll;
917 struct sk_buff *skb;
572e0012 918
d8cd189e
KV		 919 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
920 if (!skb)
572e0012 921 return;
572e0012 922
d8cd189e
KV		 923 pspoll = (struct ieee80211_pspoll *) skb->data;
924 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
572e0012 925
62ae67be
JB		 926 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
927 ieee80211_tx_skb(sdata, skb);
572e0012
KV		 928}
929
965bedad
JB		 930void ieee80211_send_nullfunc(struct ieee80211_local *local,
931 struct ieee80211_sub_if_data *sdata,
932 int powersave)
933{
934 struct sk_buff *skb;
d8cd189e 935 struct ieee80211_hdr_3addr *nullfunc;
b6f35301 936 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
965bedad 937
d8cd189e
KV		 938 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
939 if (!skb)
965bedad 940 return;
965bedad 941
d8cd189e 942 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
965bedad 943 if (powersave)
d8cd189e 944 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
965bedad 945
6c17b77b
SF		 946 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
947 IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
b6f35301
RM		 948 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
949 IEEE80211_STA_CONNECTION_POLL))
950 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
951
62ae67be 952 ieee80211_tx_skb(sdata, skb);
965bedad
JB		 953}
954
d524215f
FF		 955static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
956 struct ieee80211_sub_if_data *sdata)
957{
958 struct sk_buff *skb;
959 struct ieee80211_hdr *nullfunc;
960 __le16 fc;
961
962 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
963 return;
964
965 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
d15b8459 966 if (!skb)
d524215f 967 return;
d15b8459 968
d524215f
FF		 969 skb_reserve(skb, local->hw.extra_tx_headroom);
970
971 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
972 memset(nullfunc, 0, 30);
973 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
974 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
975 nullfunc->frame_control = fc;
976 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
977 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
978 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
979 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
980
981 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
982 ieee80211_tx_skb(sdata, skb);
983}
984
cc32abd4
JB		 985/* spectrum management related things */
986static void ieee80211_chswitch_work(struct work_struct *work)
987{
988 struct ieee80211_sub_if_data *sdata =
989 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
cc32abd4
JB		 990 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
991
9607e6b6 992 if (!ieee80211_sdata_running(sdata))
cc32abd4
JB		 993 return;
994
77fdaa12
JB		 995 mutex_lock(&ifmgd->mtx);
996 if (!ifmgd->associated)
997 goto out;
cc32abd4 998
55de908a 999 sdata->local->_oper_channel = sdata->local->csa_channel;
5ce6e438
JB		 1000 if (!sdata->local->ops->channel_switch) {
1001 /* call "hw_config" only if doing sw channel switch */
1002 ieee80211_hw_config(sdata->local,
1003 IEEE80211_CONF_CHANGE_CHANNEL);
1ea57b1f
SL		 1004 } else {
1005 /* update the device channel directly */
55de908a 1006 sdata->local->hw.conf.channel = sdata->local->_oper_channel;
5ce6e438 1007 }
77fdaa12 1008
cc32abd4 1009 /* XXX: shouldn't really modify cfg80211-owned data! */
55de908a 1010 ifmgd->associated->channel = sdata->local->_oper_channel;
cc32abd4 1011
57eebdf3 1012 /* XXX: wait for a beacon first? */
cc32abd4
JB		 1013 ieee80211_wake_queues_by_reason(&sdata->local->hw,
1014 IEEE80211_QUEUE_STOP_REASON_CSA);
77fdaa12
JB		 1015 out:
1016 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
1017 mutex_unlock(&ifmgd->mtx);
cc32abd4
JB		 1018}
1019
5ce6e438
JB		 1020void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1021{
55de908a
JB		 1022 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1023 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5ce6e438
JB		 1024
1025 trace_api_chswitch_done(sdata, success);
1026 if (!success) {
882a7c69
JB		 1027 sdata_info(sdata,
1028 "driver channel switch failed, disconnecting\n");
1029 ieee80211_queue_work(&sdata->local->hw,
1030 &ifmgd->csa_connection_drop_work);
1031 } else {
1032 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
5ce6e438 1033 }
5ce6e438
JB		 1034}
1035EXPORT_SYMBOL(ieee80211_chswitch_done);
1036
cc32abd4
JB		 1037static void ieee80211_chswitch_timer(unsigned long data)
1038{
1039 struct ieee80211_sub_if_data *sdata =
1040 (struct ieee80211_sub_if_data *) data;
1041 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1042
5bb644a0
JB		 1043 if (sdata->local->quiescing) {
1044 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
1045 return;
1046 }
1047
42935eca 1048 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
cc32abd4
JB		 1049}
1050
4a3cb702
JB		 1051void
1052ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1053 const struct ieee80211_channel_sw_ie *sw_elem,
1054 struct ieee80211_bss *bss, u64 timestamp)
cc32abd4 1055{
0c1ad2ca
JB		 1056 struct cfg80211_bss *cbss =
1057 container_of((void *)bss, struct cfg80211_bss, priv);
cc32abd4
JB		 1058 struct ieee80211_channel *new_ch;
1059 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
59eb21a6
BR		 1060 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num,
1061 cbss->channel->band);
55de908a 1062 struct ieee80211_chanctx *chanctx;
cc32abd4 1063
77fdaa12
JB		 1064 ASSERT_MGD_MTX(ifmgd);
1065
1066 if (!ifmgd->associated)
cc32abd4
JB		 1067 return;
1068
fbe9c429 1069 if (sdata->local->scanning)
cc32abd4
JB		 1070 return;
1071
1072 /* Disregard subsequent beacons if we are already running a timer
1073 processing a CSA */
1074
1075 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
1076 return;
1077
1078 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
882a7c69
JB		 1079 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED) {
1080 sdata_info(sdata,
1081 "AP %pM switches to unsupported channel (%d MHz), disconnecting\n",
1082 ifmgd->associated->bssid, new_freq);
1083 ieee80211_queue_work(&sdata->local->hw,
1084 &ifmgd->csa_connection_drop_work);
cc32abd4 1085 return;
882a7c69 1086 }
cc32abd4 1087
57eebdf3
JB		 1088 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
1089
55de908a
JB		 1090 if (sdata->local->use_chanctx) {
1091 sdata_info(sdata,
1092 "not handling channel switch with channel contexts\n");
1093 ieee80211_queue_work(&sdata->local->hw,
1094 &ifmgd->csa_connection_drop_work);
246dc3fd 1095 return;
55de908a
JB		 1096 }
1097
1098 mutex_lock(&sdata->local->chanctx_mtx);
1099 if (WARN_ON(!rcu_access_pointer(sdata->vif.chanctx_conf))) {
1100 mutex_unlock(&sdata->local->chanctx_mtx);
1101 return;
1102 }
1103 chanctx = container_of(rcu_access_pointer(sdata->vif.chanctx_conf),
1104 struct ieee80211_chanctx, conf);
1105 if (chanctx->refcount > 1) {
1106 sdata_info(sdata,
1107 "channel switch with multiple interfaces on the same channel, disconnecting\n");
1108 ieee80211_queue_work(&sdata->local->hw,
1109 &ifmgd->csa_connection_drop_work);
1110 mutex_unlock(&sdata->local->chanctx_mtx);
1111 return;
1112 }
1113 mutex_unlock(&sdata->local->chanctx_mtx);
1114
1115 sdata->local->csa_channel = new_ch;
1116
57eebdf3
JB		 1117 if (sw_elem->mode)
1118 ieee80211_stop_queues_by_reason(&sdata->local->hw,
1119 IEEE80211_QUEUE_STOP_REASON_CSA);
1120
5ce6e438
JB		 1121 if (sdata->local->ops->channel_switch) {
1122 /* use driver's channel switch callback */
57eebdf3
JB		 1123 struct ieee80211_channel_switch ch_switch = {
1124 .timestamp = timestamp,
1125 .block_tx = sw_elem->mode,
1126 .channel = new_ch,
1127 .count = sw_elem->count,
1128 };
1129
5ce6e438
JB		 1130 drv_channel_switch(sdata->local, &ch_switch);
1131 return;
1132 }
1133
1134 /* channel switch handled in software */
57eebdf3 1135 if (sw_elem->count <= 1)
42935eca 1136 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
57eebdf3 1137 else
cc32abd4 1138 mod_timer(&ifmgd->chswitch_timer,
3049000b
JB		 1139 TU_TO_EXP_TIME(sw_elem->count *
1140 cbss->beacon_interval));
cc32abd4
JB		 1141}
1142
1ea6f9c0
JB		 1143static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1144 struct ieee80211_channel *channel,
1145 const u8 *country_ie, u8 country_ie_len,
1146 const u8 *pwr_constr_elem)
cc32abd4 1147{
04b7b2ff
JB		 1148 struct ieee80211_country_ie_triplet *triplet;
1149 int chan = ieee80211_frequency_to_channel(channel->center_freq);
1150 int i, chan_pwr, chan_increment, new_ap_level;
1151 bool have_chan_pwr = false;
cc32abd4 1152
04b7b2ff
JB		 1153 /* Invalid IE */
1154 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1ea6f9c0 1155 return 0;
cc32abd4 1156
04b7b2ff
JB		 1157 triplet = (void *)(country_ie + 3);
1158 country_ie_len -= 3;
1159
1160 switch (channel->band) {
1161 default:
1162 WARN_ON_ONCE(1);
1163 /* fall through */
1164 case IEEE80211_BAND_2GHZ:
1165 case IEEE80211_BAND_60GHZ:
1166 chan_increment = 1;
1167 break;
1168 case IEEE80211_BAND_5GHZ:
1169 chan_increment = 4;
1170 break;
cc32abd4 1171 }
04b7b2ff
JB		 1172
1173 /* find channel */
1174 while (country_ie_len >= 3) {
1175 u8 first_channel = triplet->chans.first_channel;
1176
1177 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1178 goto next;
1179
1180 for (i = 0; i < triplet->chans.num_channels; i++) {
1181 if (first_channel + i * chan_increment == chan) {
1182 have_chan_pwr = true;
1183 chan_pwr = triplet->chans.max_power;
1184 break;
1185 }
1186 }
1187 if (have_chan_pwr)
1188 break;
1189
1190 next:
1191 triplet++;
1192 country_ie_len -= 3;
1193 }
1194
1195 if (!have_chan_pwr)
1ea6f9c0 1196 return 0;
04b7b2ff
JB		 1197
1198 new_ap_level = max_t(int, 0, chan_pwr - *pwr_constr_elem);
1199
1ea6f9c0
JB		 1200 if (sdata->ap_power_level == new_ap_level)
1201 return 0;
04b7b2ff
JB		 1202
1203 sdata_info(sdata,
1204 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1205 new_ap_level, chan_pwr, *pwr_constr_elem,
1206 sdata->u.mgd.bssid);
1ea6f9c0
JB		 1207 sdata->ap_power_level = new_ap_level;
1208 if (__ieee80211_recalc_txpower(sdata))
1209 return BSS_CHANGED_TXPOWER;
1210 return 0;
cc32abd4
JB		 1211}
1212
965bedad
JB		 1213/* powersave */
1214static void ieee80211_enable_ps(struct ieee80211_local *local,
1215 struct ieee80211_sub_if_data *sdata)
1216{
1217 struct ieee80211_conf *conf = &local->hw.conf;
1218
d5edaedc
JB		 1219 /*
1220 * If we are scanning right now then the parameters will
1221 * take effect when scan finishes.
1222 */
fbe9c429 1223 if (local->scanning)
d5edaedc
JB		 1224 return;
1225
965bedad
JB		 1226 if (conf->dynamic_ps_timeout > 0 &&
1227 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
1228 mod_timer(&local->dynamic_ps_timer, jiffies +
1229 msecs_to_jiffies(conf->dynamic_ps_timeout));
1230 } else {
1231 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1232 ieee80211_send_nullfunc(local, sdata, 1);
375177bf 1233
2a13052f
JO		 1234 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1235 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
1236 return;
1237
1238 conf->flags |= IEEE80211_CONF_PS;
1239 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965bedad
JB		 1240 }
1241}
1242
1243static void ieee80211_change_ps(struct ieee80211_local *local)
1244{
1245 struct ieee80211_conf *conf = &local->hw.conf;
1246
1247 if (local->ps_sdata) {
965bedad
JB		 1248 ieee80211_enable_ps(local, local->ps_sdata);
1249 } else if (conf->flags & IEEE80211_CONF_PS) {
1250 conf->flags &= ~IEEE80211_CONF_PS;
1251 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1252 del_timer_sync(&local->dynamic_ps_timer);
1253 cancel_work_sync(&local->dynamic_ps_enable_work);
1254 }
1255}
1256
808118cb
JY		 1257static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1258{
1259 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1260 struct sta_info *sta = NULL;
c2c98fde 1261 bool authorized = false;
808118cb
JY		 1262
1263 if (!mgd->powersave)
1264 return false;
1265
05cb9108
JB		 1266 if (mgd->broken_ap)
1267 return false;
1268
808118cb
JY		 1269 if (!mgd->associated)
1270 return false;
1271
808118cb
JY		 1272 if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
1273 IEEE80211_STA_CONNECTION_POLL))
1274 return false;
1275
1276 rcu_read_lock();
1277 sta = sta_info_get(sdata, mgd->bssid);
1278 if (sta)
c2c98fde 1279 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
808118cb
JY		 1280 rcu_read_unlock();
1281
c2c98fde 1282 return authorized;
808118cb
JY		 1283}
1284
965bedad 1285/* need to hold RTNL or interface lock */
10f644a4 1286void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 1287{
1288 struct ieee80211_sub_if_data *sdata, *found = NULL;
1289 int count = 0;
195e294d 1290 int timeout;
965bedad
JB		 1291
1292 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
1293 local->ps_sdata = NULL;
1294 return;
1295 }
1296
1297 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 1298 if (!ieee80211_sdata_running(sdata))
965bedad 1299 continue;
8c7914de
RM		 1300 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1301 /* If an AP vif is found, then disable PS
1302 * by setting the count to zero thereby setting
1303 * ps_sdata to NULL.
1304 */
1305 count = 0;
1306 break;
1307 }
965bedad
JB		 1308 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1309 continue;
1310 found = sdata;
1311 count++;
1312 }
1313
808118cb 1314 if (count == 1 && ieee80211_powersave_allowed(found)) {
10f644a4
JB		 1315 s32 beaconint_us;
1316
1317 if (latency < 0)
ed77134b 1318 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
10f644a4
JB		 1319
1320 beaconint_us = ieee80211_tu_to_usec(
1321 found->vif.bss_conf.beacon_int);
1322
ff616381 1323 timeout = local->dynamic_ps_forced_timeout;
195e294d
JO		 1324 if (timeout < 0) {
1325 /*
ff616381
JO		 1326 * Go to full PSM if the user configures a very low
1327 * latency requirement.
0ab82b04
EP		 1328 * The 2000 second value is there for compatibility
1329 * until the PM_QOS_NETWORK_LATENCY is configured
1330 * with real values.
195e294d 1331 */
0ab82b04
EP		 1332 if (latency > (1900 * USEC_PER_MSEC) &&
1333 latency != (2000 * USEC_PER_SEC))
195e294d 1334 timeout = 0;
ff616381
JO		 1335 else
1336 timeout = 100;
195e294d 1337 }
09b85568 1338 local->hw.conf.dynamic_ps_timeout = timeout;
195e294d 1339
04fe2037 1340 if (beaconint_us > latency) {
10f644a4 1341 local->ps_sdata = NULL;
04fe2037 1342 } else {
04fe2037 1343 int maxslp = 1;
826262c3 1344 u8 dtimper = found->u.mgd.dtim_period;
56007a02
JB		 1345
1346 /* If the TIM IE is invalid, pretend the value is 1 */
1347 if (!dtimper)
1348 dtimper = 1;
1349 else if (dtimper > 1)
04fe2037
JB		 1350 maxslp = min_t(int, dtimper,
1351 latency / beaconint_us);
1352
9ccebe61 1353 local->hw.conf.max_sleep_period = maxslp;
56007a02 1354 local->hw.conf.ps_dtim_period = dtimper;
10f644a4 1355 local->ps_sdata = found;
04fe2037 1356 }
10f644a4 1357 } else {
965bedad 1358 local->ps_sdata = NULL;
10f644a4 1359 }
965bedad
JB		 1360
1361 ieee80211_change_ps(local);
1362}
1363
ab095877
EP		 1364void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1365{
1366 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1367
1368 if (sdata->vif.bss_conf.ps != ps_allowed) {
1369 sdata->vif.bss_conf.ps = ps_allowed;
1370 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1371 }
1372}
1373
965bedad
JB		 1374void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1375{
1376 struct ieee80211_local *local =
1377 container_of(work, struct ieee80211_local,
1378 dynamic_ps_disable_work);
1379
1380 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1381 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1382 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1383 }
1384
1385 ieee80211_wake_queues_by_reason(&local->hw,
1386 IEEE80211_QUEUE_STOP_REASON_PS);
1387}
1388
1389void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1390{
1391 struct ieee80211_local *local =
1392 container_of(work, struct ieee80211_local,
1393 dynamic_ps_enable_work);
1394 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
5e34069c 1395 struct ieee80211_if_managed *ifmgd;
1ddc2867
RM		 1396 unsigned long flags;
1397 int q;
965bedad
JB		 1398
1399 /* can only happen when PS was just disabled anyway */
1400 if (!sdata)
1401 return;
1402
5e34069c
CL		 1403 ifmgd = &sdata->u.mgd;
1404
965bedad
JB		 1405 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1406 return;
1407
09b85568 1408 if (local->hw.conf.dynamic_ps_timeout > 0) {
77b7023a
AN		 1409 /* don't enter PS if TX frames are pending */
1410 if (drv_tx_frames_pending(local)) {
1ddc2867
RM		 1411 mod_timer(&local->dynamic_ps_timer, jiffies +
1412 msecs_to_jiffies(
1413 local->hw.conf.dynamic_ps_timeout));
1414 return;
1415 }
77b7023a
AN		 1416
1417 /*
1418 * transmission can be stopped by others which leads to
1419 * dynamic_ps_timer expiry. Postpone the ps timer if it
1420 * is not the actual idle state.
1421 */
1422 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1423 for (q = 0; q < local->hw.queues; q++) {
1424 if (local->queue_stop_reasons[q]) {
1425 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1426 flags);
1427 mod_timer(&local->dynamic_ps_timer, jiffies +
1428 msecs_to_jiffies(
1429 local->hw.conf.dynamic_ps_timeout));
1430 return;
1431 }
1432 }
1433 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1ddc2867 1434 }
1ddc2867 1435
375177bf 1436 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
9c38a8b4 1437 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
f3e85b9e 1438 netif_tx_stop_all_queues(sdata->dev);
965bedad 1439
e8306f98
VN		 1440 if (drv_tx_frames_pending(local))
1441 mod_timer(&local->dynamic_ps_timer, jiffies +
1442 msecs_to_jiffies(
1443 local->hw.conf.dynamic_ps_timeout));
1444 else {
1445 ieee80211_send_nullfunc(local, sdata, 1);
1446 /* Flush to get the tx status of nullfunc frame */
1447 drv_flush(local, false);
1448 }
f3e85b9e
VN		 1449 }
1450
2a13052f
JO		 1451 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1452 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
375177bf
VN		 1453 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1454 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1455 local->hw.conf.flags |= IEEE80211_CONF_PS;
1456 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1457 }
f3e85b9e 1458
77b7023a
AN		 1459 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1460 netif_tx_wake_all_queues(sdata->dev);
965bedad
JB		 1461}
1462
1463void ieee80211_dynamic_ps_timer(unsigned long data)
1464{
1465 struct ieee80211_local *local = (void *) data;
1466
78f1a8b7 1467 if (local->quiescing || local->suspended)
5bb644a0
JB		 1468 return;
1469
42935eca 1470 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 1471}
1472
164eb02d
SW		 1473void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1474{
1475 struct delayed_work *delayed_work =
1476 container_of(work, struct delayed_work, work);
1477 struct ieee80211_sub_if_data *sdata =
1478 container_of(delayed_work, struct ieee80211_sub_if_data,
1479 dfs_cac_timer_work);
1480
1481 ieee80211_vif_release_channel(sdata);
1482
1483 cfg80211_cac_event(sdata->dev, NL80211_RADAR_CAC_FINISHED, GFP_KERNEL);
1484}
1485
60f8b39c 1486/* MLME */
7d25745d 1487static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
4ced3f74 1488 struct ieee80211_sub_if_data *sdata,
4a3cb702 1489 const u8 *wmm_param, size_t wmm_param_len)
f0706e82 1490{
f0706e82 1491 struct ieee80211_tx_queue_params params;
4ced3f74 1492 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1493 size_t left;
1494 int count;
4a3cb702
JB		 1495 const u8 *pos;
1496 u8 uapsd_queues = 0;
f0706e82 1497
e1b3ec1a 1498 if (!local->ops->conf_tx)
7d25745d 1499 return false;
e1b3ec1a 1500
32c5057b 1501 if (local->hw.queues < IEEE80211_NUM_ACS)
7d25745d 1502 return false;
3434fbd3
JB		 1503
1504 if (!wmm_param)
7d25745d 1505 return false;
3434fbd3 1506
f0706e82 1507 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
7d25745d 1508 return false;
ab13315a
KV		 1509
1510 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
dc41e4d4 1511 uapsd_queues = ifmgd->uapsd_queues;
ab13315a 1512
f0706e82 1513 count = wmm_param[6] & 0x0f;
46900298 1514 if (count == ifmgd->wmm_last_param_set)
7d25745d 1515 return false;
46900298 1516 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 1517
1518 pos = wmm_param + 8;
1519 left = wmm_param_len - 8;
1520
1521 memset(&params, 0, sizeof(params));
1522
00e96dec 1523 sdata->wmm_acm = 0;
f0706e82
JB		 1524 for (; left >= 4; left -= 4, pos += 4) {
1525 int aci = (pos[0] >> 5) & 0x03;
1526 int acm = (pos[0] >> 4) & 0x01;
ab13315a 1527 bool uapsd = false;
f0706e82
JB		 1528 int queue;
1529
1530 switch (aci) {
0eeb59fe 1531 case 1: /* AC_BK */
e100bb64 1532 queue = 3;
988c0f72 1533 if (acm)
00e96dec 1534 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV		 1535 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1536 uapsd = true;
f0706e82 1537 break;
0eeb59fe 1538 case 2: /* AC_VI */
e100bb64 1539 queue = 1;
988c0f72 1540 if (acm)
00e96dec 1541 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV		 1542 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1543 uapsd = true;
f0706e82 1544 break;
0eeb59fe 1545 case 3: /* AC_VO */
e100bb64 1546 queue = 0;
988c0f72 1547 if (acm)
00e96dec 1548 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV		 1549 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1550 uapsd = true;
f0706e82 1551 break;
0eeb59fe 1552 case 0: /* AC_BE */
f0706e82 1553 default:
e100bb64 1554 queue = 2;
988c0f72 1555 if (acm)
00e96dec 1556 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV		 1557 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1558 uapsd = true;
f0706e82
JB		 1559 break;
1560 }
1561
1562 params.aifs = pos[0] & 0x0f;
1563 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1564 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 1565 params.txop = get_unaligned_le16(pos + 2);
ab13315a
KV		 1566 params.uapsd = uapsd;
1567
bdcbd8e0
JB		 1568 mlme_dbg(sdata,
1569 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1570 queue, aci, acm,
1571 params.aifs, params.cw_min, params.cw_max,
1572 params.txop, params.uapsd);
f6f3def3
EP		 1573 sdata->tx_conf[queue] = params;
1574 if (drv_conf_tx(local, sdata, queue, &params))
bdcbd8e0
JB		 1575 sdata_err(sdata,
1576 "failed to set TX queue parameters for queue %d\n",
1577 queue);
f0706e82 1578 }
e1b3ec1a
SG		 1579
1580 /* enable WMM or activate new settings */
4ced3f74 1581 sdata->vif.bss_conf.qos = true;
7d25745d 1582 return true;
f0706e82
JB		 1583}
1584
925e64c3
SG		 1585static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1586{
1587 lockdep_assert_held(&sdata->local->mtx);
1588
1589 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1590 IEEE80211_STA_BEACON_POLL);
1591 ieee80211_run_deferred_scan(sdata->local);
1592}
1593
1594static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1595{
1596 mutex_lock(&sdata->local->mtx);
1597 __ieee80211_stop_poll(sdata);
1598 mutex_unlock(&sdata->local->mtx);
1599}
1600
7a5158ef
JB		 1601static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1602 u16 capab, bool erp_valid, u8 erp)
5628221c 1603{
bda3933a 1604 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 1605 u32 changed = 0;
7a5158ef
JB		 1606 bool use_protection;
1607 bool use_short_preamble;
1608 bool use_short_slot;
1609
1610 if (erp_valid) {
1611 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1612 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1613 } else {
1614 use_protection = false;
1615 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1616 }
1617
1618 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
55de908a 1619 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
43d35343 1620 use_short_slot = true;
5628221c 1621
471b3efd 1622 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 1623 bss_conf->use_cts_prot = use_protection;
1624 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 1625 }
7e9ed188 1626
d43c7b37 1627 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 1628 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 1629 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 1630 }
d9430a32 1631
7a5158ef 1632 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 1633 bss_conf->use_short_slot = use_short_slot;
1634 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 1635 }
1636
1637 return changed;
1638}
1639
f698d856 1640static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 1641 struct cfg80211_bss *cbss,
ae5eb026 1642 u32 bss_info_changed)
f0706e82 1643{
0c1ad2ca 1644 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 1645 struct ieee80211_local *local = sdata->local;
68542962 1646 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
d6f2da5b 1647
ae5eb026 1648 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 1649 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
50ae34a2 1650 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 1651
7ccc8bd7
FF		 1652 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1653 IEEE80211_BEACON_LOSS_COUNT * bss_conf->beacon_int));
1654
0c1ad2ca
JB		 1655 sdata->u.mgd.associated = cbss;
1656 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 1657
17e4ec14
JM		 1658 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1659
488dd7b5 1660 if (sdata->vif.p2p) {
9caf0364 1661 const struct cfg80211_bss_ies *ies;
488dd7b5 1662
9caf0364
JB		 1663 rcu_read_lock();
1664 ies = rcu_dereference(cbss->ies);
1665 if (ies) {
1666 u8 noa[2];
1667 int ret;
1668
1669 ret = cfg80211_get_p2p_attr(
1670 ies->data, ies->len,
1671 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1672 noa, sizeof(noa));
1673 if (ret >= 2) {
1674 bss_conf->p2p_oppps = noa[1] & 0x80;
1675 bss_conf->p2p_ctwindow = noa[1] & 0x7f;
1676 bss_info_changed |= BSS_CHANGED_P2P_PS;
1677 sdata->u.mgd.p2p_noa_index = noa[0];
1678 }
488dd7b5 1679 }
9caf0364 1680 rcu_read_unlock();
488dd7b5
JB		 1681 }
1682
b291ba11 1683 /* just to be sure */
925e64c3 1684 ieee80211_stop_poll(sdata);
b291ba11 1685
9ac19a90 1686 ieee80211_led_assoc(local, 1);
9306102e 1687
c65dd147 1688 if (sdata->u.mgd.assoc_data->have_beacon) {
826262c3
JB		 1689 /*
1690 * If the AP is buggy we may get here with no DTIM period
1691 * known, so assume it's 1 which is the only safe assumption
1692 * in that case, although if the TIM IE is broken powersave
1693 * probably just won't work at all.
1694 */
1695 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
c65dd147 1696 bss_info_changed |= BSS_CHANGED_DTIM_PERIOD;
826262c3 1697 } else {
e5b900d2 1698 bss_conf->dtim_period = 0;
826262c3 1699 }
e5b900d2 1700
68542962 1701 bss_conf->assoc = 1;
9cef8737 1702
a97c13c3 1703 /* Tell the driver to monitor connection quality (if supported) */
ea086359 1704 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
68542962 1705 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 1706 bss_info_changed |= BSS_CHANGED_CQM;
1707
68542962 1708 /* Enable ARP filtering */
0f19b41e 1709 if (bss_conf->arp_addr_cnt)
68542962 1710 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
68542962 1711
ae5eb026 1712 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 1713
056508dc
JB		 1714 mutex_lock(&local->iflist_mtx);
1715 ieee80211_recalc_ps(local, -1);
1716 mutex_unlock(&local->iflist_mtx);
e0cb686f 1717
04ecd257 1718 ieee80211_recalc_smps(sdata);
ab095877
EP		 1719 ieee80211_recalc_ps_vif(sdata);
1720
8a5b33f5 1721 netif_tx_start_all_queues(sdata->dev);
9ac19a90 1722 netif_carrier_on(sdata->dev);
f0706e82
JB		 1723}
1724
e69e95db 1725static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
37ad3888
JB		 1726 u16 stype, u16 reason, bool tx,
1727 u8 *frame_buf)
aa458d17 1728{
46900298 1729 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17 1730 struct ieee80211_local *local = sdata->local;
3cc5240b 1731 u32 changed = 0;
aa458d17 1732
77fdaa12
JB		 1733 ASSERT_MGD_MTX(ifmgd);
1734
37ad3888
JB		 1735 if (WARN_ON_ONCE(tx && !frame_buf))
1736 return;
1737
b291ba11
JB		 1738 if (WARN_ON(!ifmgd->associated))
1739 return;
1740
79543d8e
DS		 1741 ieee80211_stop_poll(sdata);
1742
77fdaa12 1743 ifmgd->associated = NULL;
77fdaa12
JB		 1744
1745 /*
1746 * we need to commit the associated = NULL change because the
1747 * scan code uses that to determine whether this iface should
1748 * go to/wake up from powersave or not -- and could otherwise
1749 * wake the queues erroneously.
1750 */
1751 smp_mb();
1752
1753 /*
1754 * Thus, we can only afterwards stop the queues -- to account
1755 * for the case where another CPU is finishing a scan at this
1756 * time -- we don't want the scan code to enable queues.
1757 */
aa458d17 1758
8a5b33f5 1759 netif_tx_stop_all_queues(sdata->dev);
aa458d17
TW		 1760 netif_carrier_off(sdata->dev);
1761
88bc40e8
EP		 1762 /*
1763 * if we want to get out of ps before disassoc (why?) we have
1764 * to do it before sending disassoc, as otherwise the null-packet
1765 * won't be valid.
1766 */
1767 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1768 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1769 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1770 }
1771 local->ps_sdata = NULL;
1772
ab095877
EP		 1773 /* disable per-vif ps */
1774 ieee80211_recalc_ps_vif(sdata);
1775
f823981e
EP		 1776 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1777 if (tx)
1778 drv_flush(local, false);
1779
37ad3888
JB		 1780 /* deauthenticate/disassociate now */
1781 if (tx || frame_buf)
88a9e31c
EP		 1782 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
1783 reason, tx, frame_buf);
37ad3888
JB		 1784
1785 /* flush out frame */
1786 if (tx)
1787 drv_flush(local, false);
1788
88a9e31c
EP		 1789 /* clear bssid only after building the needed mgmt frames */
1790 memset(ifmgd->bssid, 0, ETH_ALEN);
1791
37ad3888 1792 /* remove AP and TDLS peers */
051007d9 1793 sta_info_flush_defer(sdata);
37ad3888
JB		 1794
1795 /* finally reset all BSS / config parameters */
f5e5bf25
TW		 1796 changed |= ieee80211_reset_erp_info(sdata);
1797
f5e5bf25 1798 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 1799 changed |= BSS_CHANGED_ASSOC;
1800 sdata->vif.bss_conf.assoc = false;
f5e5bf25 1801
488dd7b5
JB		 1802 sdata->vif.bss_conf.p2p_ctwindow = 0;
1803 sdata->vif.bss_conf.p2p_oppps = false;
1804
413ad50a 1805 /* on the next assoc, re-program HT parameters */
ef96a842
BG		 1806 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1807 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
413ad50a 1808
1ea6f9c0 1809 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
a8302de9 1810
520eb820
KV		 1811 del_timer_sync(&local->dynamic_ps_timer);
1812 cancel_work_sync(&local->dynamic_ps_enable_work);
1813
68542962 1814 /* Disable ARP filtering */
0f19b41e 1815 if (sdata->vif.bss_conf.arp_addr_cnt)
68542962 1816 changed |= BSS_CHANGED_ARP_FILTER;
68542962 1817
3abead59
JB		 1818 sdata->vif.bss_conf.qos = false;
1819 changed |= BSS_CHANGED_QOS;
1820
0aaffa9b
JB		 1821 /* The BSSID (not really interesting) and HT changed */
1822 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 1823 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 1824
3abead59
JB		 1825 /* disassociated - set to defaults now */
1826 ieee80211_set_wmm_default(sdata, false);
1827
b9dcf712
JB		 1828 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1829 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1830 del_timer_sync(&sdata->u.mgd.timer);
1831 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2d9957cc
JB		 1832
1833 sdata->u.mgd.timers_running = 0;
028e8da0 1834
826262c3
JB		 1835 sdata->vif.bss_conf.dtim_period = 0;
1836
028e8da0
JB		 1837 ifmgd->flags = 0;
1838 ieee80211_vif_release_channel(sdata);
aa458d17 1839}
f0706e82 1840
3cf335d5
KV		 1841void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1842 struct ieee80211_hdr *hdr)
1843{
1844 /*
1845 * We can postpone the mgd.timer whenever receiving unicast frames
1846 * from AP because we know that the connection is working both ways
1847 * at that time. But multicast frames (and hence also beacons) must
1848 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 1849 * data idle periods for sending the periodic probe request to the
1850 * AP we're connected to.
3cf335d5 1851 */
b291ba11
JB		 1852 if (is_multicast_ether_addr(hdr->addr1))
1853 return;
1854
be099e82 1855 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 1856}
f0706e82 1857
4e5ff376
FF		 1858static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1859{
1860 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
133d40f9 1861 struct ieee80211_local *local = sdata->local;
4e5ff376 1862
133d40f9 1863 mutex_lock(&local->mtx);
4e5ff376 1864 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
133d40f9
SG		 1865 IEEE80211_STA_CONNECTION_POLL))) {
1866 mutex_unlock(&local->mtx);
1867 return;
1868 }
4e5ff376 1869
925e64c3 1870 __ieee80211_stop_poll(sdata);
133d40f9
SG		 1871
1872 mutex_lock(&local->iflist_mtx);
1873 ieee80211_recalc_ps(local, -1);
1874 mutex_unlock(&local->iflist_mtx);
4e5ff376
FF		 1875
1876 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
133d40f9 1877 goto out;
4e5ff376
FF		 1878
1879 /*
1880 * We've received a probe response, but are not sure whether
1881 * we have or will be receiving any beacons or data, so let's
1882 * schedule the timers again, just in case.
1883 */
1884 ieee80211_sta_reset_beacon_monitor(sdata);
1885
1886 mod_timer(&ifmgd->conn_mon_timer,
1887 round_jiffies_up(jiffies +
1888 IEEE80211_CONNECTION_IDLE_TIME));
133d40f9 1889out:
133d40f9 1890 mutex_unlock(&local->mtx);
4e5ff376
FF		 1891}
1892
1893void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
04ac3c0e 1894 struct ieee80211_hdr *hdr, bool ack)
4e5ff376 1895{
75706d0e 1896 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF		 1897 return;
1898
4e5ff376
FF		 1899 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1900 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e 1901 if (ack)
cab1c7fd 1902 ieee80211_sta_reset_conn_monitor(sdata);
04ac3c0e
FF		 1903 else
1904 sdata->u.mgd.nullfunc_failed = true;
4e5ff376 1905 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
cab1c7fd 1906 return;
4e5ff376 1907 }
cab1c7fd
WD		 1908
1909 if (ack)
1910 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF		 1911}
1912
a43abf29
ML		 1913static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1914{
1915 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1916 const u8 *ssid;
f01a067d 1917 u8 *dst = ifmgd->associated->bssid;
180205bd 1918 u8 unicast_limit = max(1, max_probe_tries - 3);
f01a067d
LR		 1919
1920 /*
1921 * Try sending broadcast probe requests for the last three
1922 * probe requests after the first ones failed since some
1923 * buggy APs only support broadcast probe requests.
1924 */
1925 if (ifmgd->probe_send_count >= unicast_limit)
1926 dst = NULL;
a43abf29 1927
4e5ff376
FF		 1928 /*
1929 * When the hardware reports an accurate Tx ACK status, it's
1930 * better to send a nullfunc frame instead of a probe request,
1931 * as it will kick us off the AP quickly if we aren't associated
1932 * anymore. The timeout will be reset if the frame is ACKed by
1933 * the AP.
1934 */
992e68bf
SD		 1935 ifmgd->probe_send_count++;
1936
04ac3c0e
FF		 1937 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1938 ifmgd->nullfunc_failed = false;
4e5ff376 1939 ieee80211_send_nullfunc(sdata->local, sdata, 0);
04ac3c0e 1940 } else {
88c868c4
SG		 1941 int ssid_len;
1942
9caf0364 1943 rcu_read_lock();
4e5ff376 1944 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
88c868c4
SG		 1945 if (WARN_ON_ONCE(ssid == NULL))
1946 ssid_len = 0;
1947 else
1948 ssid_len = ssid[1];
1949
1950 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
1672c0e3 1951 0, (u32) -1, true, 0,
55de908a 1952 ifmgd->associated->channel, false);
9caf0364 1953 rcu_read_unlock();
4e5ff376 1954 }
a43abf29 1955
180205bd 1956 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
a43abf29 1957 run_again(ifmgd, ifmgd->probe_timeout);
f69b9c79
RM		 1958 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
1959 drv_flush(sdata->local, false);
a43abf29
ML		 1960}
1961
b291ba11
JB		 1962static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1963 bool beacon)
04de8381 1964{
04de8381 1965 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 1966 bool already = false;
34bfc411 1967
9607e6b6 1968 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 1969 return;
1970
77fdaa12
JB		 1971 mutex_lock(&ifmgd->mtx);
1972
1973 if (!ifmgd->associated)
1974 goto out;
1975
133d40f9
SG		 1976 mutex_lock(&sdata->local->mtx);
1977
1978 if (sdata->local->tmp_channel || sdata->local->scanning) {
1979 mutex_unlock(&sdata->local->mtx);
1980 goto out;
1981 }
1982
e87cc472 1983 if (beacon)
bdcbd8e0 1984 mlme_dbg_ratelimited(sdata,
112c31f0 1985 "detected beacon loss from AP - probing\n");
bdcbd8e0 1986
6efb71b0
HS		 1987 ieee80211_cqm_rssi_notify(&sdata->vif,
1988 NL80211_CQM_RSSI_BEACON_LOSS_EVENT, GFP_KERNEL);
04de8381 1989
b291ba11
JB		 1990 /*
1991 * The driver/our work has already reported this event or the
1992 * connection monitoring has kicked in and we have already sent
1993 * a probe request. Or maybe the AP died and the driver keeps
1994 * reporting until we disassociate...
1995 *
1996 * In either case we have to ignore the current call to this
1997 * function (except for setting the correct probe reason bit)
1998 * because otherwise we would reset the timer every time and
1999 * never check whether we received a probe response!
2000 */
2001 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2002 IEEE80211_STA_CONNECTION_POLL))
2003 already = true;
2004
2005 if (beacon)
2006 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
2007 else
2008 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2009
133d40f9
SG		 2010 mutex_unlock(&sdata->local->mtx);
2011
b291ba11
JB		 2012 if (already)
2013 goto out;
2014
4e751843
JB		 2015 mutex_lock(&sdata->local->iflist_mtx);
2016 ieee80211_recalc_ps(sdata->local, -1);
2017 mutex_unlock(&sdata->local->iflist_mtx);
2018
a43abf29
ML		 2019 ifmgd->probe_send_count = 0;
2020 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12
JB		 2021 out:
2022 mutex_unlock(&ifmgd->mtx);
04de8381
KV		 2023}
2024
a619a4c0
JO		 2025struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2026 struct ieee80211_vif *vif)
2027{
2028 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2029 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d9b3b28b 2030 struct cfg80211_bss *cbss;
a619a4c0
JO		 2031 struct sk_buff *skb;
2032 const u8 *ssid;
88c868c4 2033 int ssid_len;
a619a4c0
JO		 2034
2035 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2036 return NULL;
2037
2038 ASSERT_MGD_MTX(ifmgd);
2039
d9b3b28b
EP		 2040 if (ifmgd->associated)
2041 cbss = ifmgd->associated;
2042 else if (ifmgd->auth_data)
2043 cbss = ifmgd->auth_data->bss;
2044 else if (ifmgd->assoc_data)
2045 cbss = ifmgd->assoc_data->bss;
2046 else
a619a4c0
JO		 2047 return NULL;
2048
9caf0364 2049 rcu_read_lock();
d9b3b28b 2050 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
88c868c4
SG		 2051 if (WARN_ON_ONCE(ssid == NULL))
2052 ssid_len = 0;
2053 else
2054 ssid_len = ssid[1];
2055
d9b3b28b 2056 skb = ieee80211_build_probe_req(sdata, cbss->bssid,
55de908a 2057 (u32) -1, cbss->channel,
6b77863b 2058 ssid + 2, ssid_len,
85a237fe 2059 NULL, 0, true);
9caf0364 2060 rcu_read_unlock();
a619a4c0
JO		 2061
2062 return skb;
2063}
2064EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2065
eef9e54c 2066static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
1e4dcd01
JO		 2067{
2068 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 2069 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
1e4dcd01
JO		 2070
2071 mutex_lock(&ifmgd->mtx);
2072 if (!ifmgd->associated) {
2073 mutex_unlock(&ifmgd->mtx);
2074 return;
2075 }
2076
37ad3888
JB		 2077 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2078 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
eef9e54c 2079 true, frame_buf);
882a7c69 2080 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
5b36ebd8
JB		 2081 ieee80211_wake_queues_by_reason(&sdata->local->hw,
2082 IEEE80211_QUEUE_STOP_REASON_CSA);
1e4dcd01 2083 mutex_unlock(&ifmgd->mtx);
7da7cc1d 2084
1e4dcd01
JO		 2085 /*
2086 * must be outside lock due to cfg80211,
2087 * but that's not a problem.
2088 */
6ae16775 2089 cfg80211_send_deauth(sdata->dev, frame_buf, IEEE80211_DEAUTH_FRAME_LEN);
1e4dcd01
JO		 2090}
2091
cc74c0c7 2092static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 2093{
2094 struct ieee80211_sub_if_data *sdata =
2095 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 2096 u.mgd.beacon_connection_loss_work);
a85e1d55
PS		 2097 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2098 struct sta_info *sta;
2099
2100 if (ifmgd->associated) {
30fa9047 2101 rcu_read_lock();
a85e1d55
PS		 2102 sta = sta_info_get(sdata, ifmgd->bssid);
2103 if (sta)
2104 sta->beacon_loss_count++;
30fa9047 2105 rcu_read_unlock();
a85e1d55 2106 }
b291ba11 2107
682bd38b 2108 if (ifmgd->connection_loss) {
882a7c69
JB		 2109 sdata_info(sdata, "Connection to AP %pM lost\n",
2110 ifmgd->bssid);
eef9e54c 2111 __ieee80211_disconnect(sdata);
882a7c69 2112 } else {
1e4dcd01 2113 ieee80211_mgd_probe_ap(sdata, true);
882a7c69
JB		 2114 }
2115}
2116
2117static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2118{
2119 struct ieee80211_sub_if_data *sdata =
2120 container_of(work, struct ieee80211_sub_if_data,
2121 u.mgd.csa_connection_drop_work);
2122
eef9e54c 2123 __ieee80211_disconnect(sdata);
b291ba11
JB		 2124}
2125
04de8381
KV		 2126void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2127{
2128 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 2129 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 2130
b5878a2d
JB		 2131 trace_api_beacon_loss(sdata);
2132
1e4dcd01 2133 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
682bd38b 2134 sdata->u.mgd.connection_loss = false;
1e4dcd01 2135 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 2136}
2137EXPORT_SYMBOL(ieee80211_beacon_loss);
2138
1e4dcd01
JO		 2139void ieee80211_connection_loss(struct ieee80211_vif *vif)
2140{
2141 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2142 struct ieee80211_hw *hw = &sdata->local->hw;
2143
b5878a2d
JB		 2144 trace_api_connection_loss(sdata);
2145
682bd38b 2146 sdata->u.mgd.connection_loss = true;
1e4dcd01
JO		 2147 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2148}
2149EXPORT_SYMBOL(ieee80211_connection_loss);
2150
2151
66e67e41
JB		 2152static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2153 bool assoc)
2154{
2155 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2156
2157 lockdep_assert_held(&sdata->u.mgd.mtx);
2158
66e67e41
JB		 2159 if (!assoc) {
2160 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2161
2162 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2163 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
028e8da0 2164 sdata->u.mgd.flags = 0;
55de908a 2165 ieee80211_vif_release_channel(sdata);
66e67e41
JB		 2166 }
2167
5b112d3d 2168 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
66e67e41
JB		 2169 kfree(auth_data);
2170 sdata->u.mgd.auth_data = NULL;
2171}
2172
2173static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2174 struct ieee80211_mgmt *mgmt, size_t len)
2175{
1672c0e3 2176 struct ieee80211_local *local = sdata->local;
66e67e41
JB		 2177 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2178 u8 *pos;
2179 struct ieee802_11_elems elems;
1672c0e3 2180 u32 tx_flags = 0;
66e67e41
JB		 2181
2182 pos = mgmt->u.auth.variable;
2183 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2184 if (!elems.challenge)
2185 return;
2186 auth_data->expected_transaction = 4;
a1845fc7 2187 drv_mgd_prepare_tx(sdata->local, sdata);
1672c0e3
JB		 2188 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2189 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2190 IEEE80211_TX_INTFL_MLME_CONN_TX;
700e8ea6 2191 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
66e67e41
JB		 2192 elems.challenge - 2, elems.challenge_len + 2,
2193 auth_data->bss->bssid, auth_data->bss->bssid,
2194 auth_data->key, auth_data->key_len,
1672c0e3 2195 auth_data->key_idx, tx_flags);
66e67e41
JB		 2196}
2197
2198static enum rx_mgmt_action __must_check
2199ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2200 struct ieee80211_mgmt *mgmt, size_t len)
2201{
2202 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2203 u8 bssid[ETH_ALEN];
2204 u16 auth_alg, auth_transaction, status_code;
2205 struct sta_info *sta;
2206
2207 lockdep_assert_held(&ifmgd->mtx);
2208
2209 if (len < 24 + 6)
2210 return RX_MGMT_NONE;
2211
2212 if (!ifmgd->auth_data || ifmgd->auth_data->done)
2213 return RX_MGMT_NONE;
2214
2215 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2216
b203ca39 2217 if (!ether_addr_equal(bssid, mgmt->bssid))
66e67e41
JB		 2218 return RX_MGMT_NONE;
2219
2220 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2221 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2222 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2223
2224 if (auth_alg != ifmgd->auth_data->algorithm ||
0f4126e8
JM		 2225 auth_transaction != ifmgd->auth_data->expected_transaction) {
2226 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2227 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2228 auth_transaction,
2229 ifmgd->auth_data->expected_transaction);
66e67e41 2230 return RX_MGMT_NONE;
0f4126e8 2231 }
66e67e41
JB		 2232
2233 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2234 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2235 mgmt->sa, status_code);
dac211ec
EP		 2236 ieee80211_destroy_auth_data(sdata, false);
2237 return RX_MGMT_CFG80211_RX_AUTH;
66e67e41
JB		 2238 }
2239
2240 switch (ifmgd->auth_data->algorithm) {
2241 case WLAN_AUTH_OPEN:
2242 case WLAN_AUTH_LEAP:
2243 case WLAN_AUTH_FT:
6b8ece3a 2244 case WLAN_AUTH_SAE:
66e67e41
JB		 2245 break;
2246 case WLAN_AUTH_SHARED_KEY:
2247 if (ifmgd->auth_data->expected_transaction != 4) {
2248 ieee80211_auth_challenge(sdata, mgmt, len);
2249 /* need another frame */
2250 return RX_MGMT_NONE;
2251 }
2252 break;
2253 default:
2254 WARN_ONCE(1, "invalid auth alg %d",
2255 ifmgd->auth_data->algorithm);
2256 return RX_MGMT_NONE;
2257 }
2258
bdcbd8e0 2259 sdata_info(sdata, "authenticated\n");
66e67e41
JB		 2260 ifmgd->auth_data->done = true;
2261 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
89afe614 2262 ifmgd->auth_data->timeout_started = true;
66e67e41
JB		 2263 run_again(ifmgd, ifmgd->auth_data->timeout);
2264
6b8ece3a
JM		 2265 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2266 ifmgd->auth_data->expected_transaction != 2) {
2267 /*
2268 * Report auth frame to user space for processing since another
2269 * round of Authentication frames is still needed.
2270 */
2271 return RX_MGMT_CFG80211_RX_AUTH;
2272 }
2273
66e67e41
JB		 2274 /* move station state to auth */
2275 mutex_lock(&sdata->local->sta_mtx);
2276 sta = sta_info_get(sdata, bssid);
2277 if (!sta) {
2278 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2279 goto out_err;
2280 }
2281 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
bdcbd8e0 2282 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
66e67e41
JB		 2283 goto out_err;
2284 }
2285 mutex_unlock(&sdata->local->sta_mtx);
2286
2287 return RX_MGMT_CFG80211_RX_AUTH;
2288 out_err:
2289 mutex_unlock(&sdata->local->sta_mtx);
2290 /* ignore frame -- wait for timeout */
2291 return RX_MGMT_NONE;
2292}
2293
2294
77fdaa12
JB		 2295static enum rx_mgmt_action __must_check
2296ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
77fdaa12 2297 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2298{
46900298 2299 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 2300 const u8 *bssid = NULL;
f0706e82
JB		 2301 u16 reason_code;
2302
66e67e41
JB		 2303 lockdep_assert_held(&ifmgd->mtx);
2304
f4ea83dd 2305 if (len < 24 + 2)
77fdaa12 2306 return RX_MGMT_NONE;
f0706e82 2307
66e67e41 2308 if (!ifmgd->associated ||
b203ca39 2309 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
66e67e41 2310 return RX_MGMT_NONE;
77fdaa12 2311
0c1ad2ca 2312 bssid = ifmgd->associated->bssid;
f0706e82
JB		 2313
2314 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2315
bdcbd8e0
JB		 2316 sdata_info(sdata, "deauthenticated from %pM (Reason: %u)\n",
2317 bssid, reason_code);
77fdaa12 2318
37ad3888
JB		 2319 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2320
77fdaa12 2321 return RX_MGMT_CFG80211_DEAUTH;
f0706e82
JB		 2322}
2323
2324
77fdaa12
JB		 2325static enum rx_mgmt_action __must_check
2326ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2327 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2328{
46900298 2329 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 2330 u16 reason_code;
2331
66e67e41 2332 lockdep_assert_held(&ifmgd->mtx);
77fdaa12 2333
66e67e41 2334 if (len < 24 + 2)
77fdaa12
JB		 2335 return RX_MGMT_NONE;
2336
66e67e41 2337 if (!ifmgd->associated ||
b203ca39 2338 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
77fdaa12 2339 return RX_MGMT_NONE;
f0706e82
JB		 2340
2341 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2342
bdcbd8e0
JB		 2343 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2344 mgmt->sa, reason_code);
f0706e82 2345
37ad3888
JB		 2346 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2347
77fdaa12 2348 return RX_MGMT_CFG80211_DISASSOC;
f0706e82
JB		 2349}
2350
c74d084f
CL		 2351static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2352 u8 *supp_rates, unsigned int supp_rates_len,
2353 u32 *rates, u32 *basic_rates,
2354 bool *have_higher_than_11mbit,
2355 int *min_rate, int *min_rate_index)
2356{
2357 int i, j;
2358
2359 for (i = 0; i < supp_rates_len; i++) {
2360 int rate = (supp_rates[i] & 0x7f) * 5;
2361 bool is_basic = !!(supp_rates[i] & 0x80);
2362
2363 if (rate > 110)
2364 *have_higher_than_11mbit = true;
2365
2366 /*
2367 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2368 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2369 *
2370 * Note: Even through the membership selector and the basic
2371 * rate flag share the same bit, they are not exactly
2372 * the same.
2373 */
2374 if (!!(supp_rates[i] & 0x80) &&
2375 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2376 continue;
2377
2378 for (j = 0; j < sband->n_bitrates; j++) {
2379 if (sband->bitrates[j].bitrate == rate) {
2380 *rates |= BIT(j);
2381 if (is_basic)
2382 *basic_rates |= BIT(j);
2383 if (rate < *min_rate) {
2384 *min_rate = rate;
2385 *min_rate_index = j;
2386 }
2387 break;
2388 }
2389 }
2390 }
2391}
f0706e82 2392
66e67e41
JB		 2393static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2394 bool assoc)
2395{
2396 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2397
2398 lockdep_assert_held(&sdata->u.mgd.mtx);
2399
66e67e41
JB		 2400 if (!assoc) {
2401 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2402
2403 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2404 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
028e8da0 2405 sdata->u.mgd.flags = 0;
55de908a 2406 ieee80211_vif_release_channel(sdata);
66e67e41
JB		 2407 }
2408
2409 kfree(assoc_data);
2410 sdata->u.mgd.assoc_data = NULL;
2411}
2412
2413static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2414 struct cfg80211_bss *cbss,
af6b6374 2415 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2416{
46900298 2417 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 2418 struct ieee80211_local *local = sdata->local;
8318d78a 2419 struct ieee80211_supported_band *sband;
f0706e82 2420 struct sta_info *sta;
af6b6374 2421 u8 *pos;
af6b6374 2422 u16 capab_info, aid;
f0706e82 2423 struct ieee802_11_elems elems;
bda3933a 2424 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
ae5eb026 2425 u32 changed = 0;
c74d084f 2426 int err;
f0706e82 2427
af6b6374 2428 /* AssocResp and ReassocResp have identical structure */
f0706e82 2429
f0706e82 2430 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 2431 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 2432
1dd84aa2 2433 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
bdcbd8e0
JB		 2434 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2435 aid);
1dd84aa2
JB		 2436 aid &= ~(BIT(15) | BIT(14));
2437
05cb9108
JB		 2438 ifmgd->broken_ap = false;
2439
2440 if (aid == 0 || aid > IEEE80211_MAX_AID) {
bdcbd8e0
JB		 2441 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2442 aid);
05cb9108
JB		 2443 aid = 0;
2444 ifmgd->broken_ap = true;
2445 }
2446
af6b6374
JB		 2447 pos = mgmt->u.assoc_resp.variable;
2448 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2449
f0706e82 2450 if (!elems.supp_rates) {
bdcbd8e0 2451 sdata_info(sdata, "no SuppRates element in AssocResp\n");
af6b6374 2452 return false;
f0706e82
JB		 2453 }
2454
46900298 2455 ifmgd->aid = aid;
f0706e82 2456
30eb1dc2
JB		 2457 /*
2458 * We previously checked these in the beacon/probe response, so
2459 * they should be present here. This is just a safety net.
2460 */
2461 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2462 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2463 sdata_info(sdata,
2464 "HT AP is missing WMM params or HT capability/operation in AssocResp\n");
2465 return false;
2466 }
2467
2468 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2469 (!elems.vht_cap_elem || !elems.vht_operation)) {
2470 sdata_info(sdata,
2471 "VHT AP is missing VHT capability/operation in AssocResp\n");
2472 return false;
2473 }
2474
2a33bee2
GE		 2475 mutex_lock(&sdata->local->sta_mtx);
2476 /*
2477 * station info was already allocated and inserted before
2478 * the association and should be available to us
2479 */
7852e361 2480 sta = sta_info_get(sdata, cbss->bssid);
2a33bee2
GE		 2481 if (WARN_ON(!sta)) {
2482 mutex_unlock(&sdata->local->sta_mtx);
af6b6374 2483 return false;
77fdaa12 2484 }
05e5e883 2485
55de908a 2486 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
f709fc69 2487
30eb1dc2 2488 /* Set up internal HT/VHT capabilities */
a8243b72 2489 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
ef96a842 2490 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
e1a0c6b3 2491 elems.ht_cap_elem, sta);
64f68e5d 2492
818255ea
MP		 2493 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2494 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
4a34215e 2495 elems.vht_cap_elem, sta);
818255ea 2496
30eb1dc2
JB		 2497 /*
2498 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
2499 * in their association response, so ignore that data for our own
2500 * configuration. If it changed since the last beacon, we'll get the
2501 * next beacon and update then.
2502 */
1128958d 2503
bee7f586
JB		 2504 /*
2505 * If an operating mode notification IE is present, override the
2506 * NSS calculation (that would be done in rate_control_rate_init())
2507 * and use the # of streams from that element.
2508 */
2509 if (elems.opmode_notif &&
2510 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
2511 u8 nss;
2512
2513 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
2514 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
2515 nss += 1;
2516 sta->sta.rx_nss = nss;
2517 }
2518
4b7679a5 2519 rate_control_rate_init(sta);
f0706e82 2520
46900298 2521 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
c2c98fde 2522 set_sta_flag(sta, WLAN_STA_MFP);
5394af4d 2523
ddf4ac53 2524 if (elems.wmm_param)
c2c98fde 2525 set_sta_flag(sta, WLAN_STA_WME);
ddf4ac53 2526
3e4d40fa 2527 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
c8987876
JB		 2528 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2529 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2530 if (err) {
bdcbd8e0
JB		 2531 sdata_info(sdata,
2532 "failed to move station %pM to desired state\n",
2533 sta->sta.addr);
c8987876
JB		 2534 WARN_ON(__sta_info_destroy(sta));
2535 mutex_unlock(&sdata->local->sta_mtx);
2536 return false;
2537 }
2538
7852e361 2539 mutex_unlock(&sdata->local->sta_mtx);
ddf4ac53 2540
f2176d72
JO		 2541 /*
2542 * Always handle WMM once after association regardless
2543 * of the first value the AP uses. Setting -1 here has
2544 * that effect because the AP values is an unsigned
2545 * 4-bit value.
2546 */
2547 ifmgd->wmm_last_param_set = -1;
2548
ddf4ac53 2549 if (elems.wmm_param)
4ced3f74 2550 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 2551 elems.wmm_param_len);
aa837e1d 2552 else
3abead59
JB		 2553 ieee80211_set_wmm_default(sdata, false);
2554 changed |= BSS_CHANGED_QOS;
f0706e82 2555
60f8b39c
JB		 2556 /* set AID and assoc capability,
2557 * ieee80211_set_associated() will tell the driver */
2558 bss_conf->aid = aid;
2559 bss_conf->assoc_capability = capab_info;
0c1ad2ca 2560 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 2561
d524215f
FF		 2562 /*
2563 * If we're using 4-addr mode, let the AP know that we're
2564 * doing so, so that it can create the STA VLAN on its side
2565 */
2566 if (ifmgd->use_4addr)
2567 ieee80211_send_4addr_nullfunc(local, sdata);
2568
15b7b062 2569 /*
b291ba11
JB		 2570 * Start timer to probe the connection to the AP now.
2571 * Also start the timer that will detect beacon loss.
15b7b062 2572 */
b291ba11 2573 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 2574 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 2575
af6b6374 2576 return true;
f0706e82
JB		 2577}
2578
66e67e41
JB		 2579static enum rx_mgmt_action __must_check
2580ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2581 struct ieee80211_mgmt *mgmt, size_t len,
2582 struct cfg80211_bss **bss)
2583{
2584 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2585 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2586 u16 capab_info, status_code, aid;
2587 struct ieee802_11_elems elems;
2588 u8 *pos;
2589 bool reassoc;
2590
2591 lockdep_assert_held(&ifmgd->mtx);
2592
2593 if (!assoc_data)
2594 return RX_MGMT_NONE;
b203ca39 2595 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
66e67e41
JB		 2596 return RX_MGMT_NONE;
2597
2598 /*
2599 * AssocResp and ReassocResp have identical structure, so process both
2600 * of them in this function.
2601 */
2602
2603 if (len < 24 + 6)
2604 return RX_MGMT_NONE;
2605
2606 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2607 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2608 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2609 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2610
bdcbd8e0
JB		 2611 sdata_info(sdata,
2612 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2613 reassoc ? "Rea" : "A", mgmt->sa,
2614 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
66e67e41
JB		 2615
2616 pos = mgmt->u.assoc_resp.variable;
2617 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2618
2619 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
2620 elems.timeout_int && elems.timeout_int_len == 5 &&
2621 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
2622 u32 tu, ms;
2623 tu = get_unaligned_le32(elems.timeout_int + 1);
2624 ms = tu * 1024 / 1000;
bdcbd8e0
JB		 2625 sdata_info(sdata,
2626 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2627 mgmt->sa, tu, ms);
66e67e41 2628 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
89afe614 2629 assoc_data->timeout_started = true;
66e67e41
JB		 2630 if (ms > IEEE80211_ASSOC_TIMEOUT)
2631 run_again(ifmgd, assoc_data->timeout);
2632 return RX_MGMT_NONE;
2633 }
2634
2635 *bss = assoc_data->bss;
2636
2637 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2638 sdata_info(sdata, "%pM denied association (code=%d)\n",
2639 mgmt->sa, status_code);
66e67e41
JB		 2640 ieee80211_destroy_assoc_data(sdata, false);
2641 } else {
66e67e41
JB		 2642 if (!ieee80211_assoc_success(sdata, *bss, mgmt, len)) {
2643 /* oops -- internal error -- send timeout for now */
10a9109f 2644 ieee80211_destroy_assoc_data(sdata, false);
5b112d3d 2645 cfg80211_put_bss(sdata->local->hw.wiphy, *bss);
66e67e41
JB		 2646 return RX_MGMT_CFG80211_ASSOC_TIMEOUT;
2647 }
635d999f 2648 sdata_info(sdata, "associated\n");
79ebfb85
JB		 2649
2650 /*
2651 * destroy assoc_data afterwards, as otherwise an idle
2652 * recalc after assoc_data is NULL but before associated
2653 * is set can cause the interface to go idle
2654 */
2655 ieee80211_destroy_assoc_data(sdata, true);
66e67e41
JB		 2656 }
2657
2658 return RX_MGMT_CFG80211_RX_ASSOC;
2659}
8e3c1b77 2660
98c8fccf 2661static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
8e3c1b77 2662 struct ieee80211_mgmt *mgmt, size_t len,
98c8fccf 2663 struct ieee80211_rx_status *rx_status,
d45c4172 2664 struct ieee802_11_elems *elems)
98c8fccf
JB		 2665{
2666 struct ieee80211_local *local = sdata->local;
2667 int freq;
c2b13452 2668 struct ieee80211_bss *bss;
98c8fccf 2669 struct ieee80211_channel *channel;
56007a02
JB		 2670 bool need_ps = false;
2671
826262c3
JB		 2672 if ((sdata->u.mgd.associated &&
2673 ether_addr_equal(mgmt->bssid, sdata->u.mgd.associated->bssid)) ||
2674 (sdata->u.mgd.assoc_data &&
2675 ether_addr_equal(mgmt->bssid,
2676 sdata->u.mgd.assoc_data->bss->bssid))) {
56007a02 2677 /* not previously set so we may need to recalc */
826262c3
JB		 2678 need_ps = sdata->u.mgd.associated && !sdata->u.mgd.dtim_period;
2679
2680 if (elems->tim && !elems->parse_error) {
4a3cb702 2681 const struct ieee80211_tim_ie *tim_ie = elems->tim;
826262c3
JB		 2682 sdata->u.mgd.dtim_period = tim_ie->dtim_period;
2683 }
56007a02 2684 }
98c8fccf
JB		 2685
2686 if (elems->ds_params && elems->ds_params_len == 1)
59eb21a6
BR		 2687 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
2688 rx_status->band);
98c8fccf
JB		 2689 else
2690 freq = rx_status->freq;
2691
2692 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2693
2694 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2695 return;
2696
98c8fccf 2697 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
d45c4172 2698 channel);
77fdaa12
JB		 2699 if (bss)
2700 ieee80211_rx_bss_put(local, bss);
2701
2702 if (!sdata->u.mgd.associated)
98c8fccf
JB		 2703 return;
2704
56007a02
JB		 2705 if (need_ps) {
2706 mutex_lock(&local->iflist_mtx);
2707 ieee80211_recalc_ps(local, -1);
2708 mutex_unlock(&local->iflist_mtx);
2709 }
2710
5bc1420b
JB		 2711 if (elems->ch_switch_ie &&
2712 memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid, ETH_ALEN) == 0)
2713 ieee80211_sta_process_chanswitch(sdata, elems->ch_switch_ie,
5ce6e438 2714 bss, rx_status->mactime);
f0706e82
JB		 2715}
2716
2717
f698d856 2718static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 2719 struct sk_buff *skb)
f0706e82 2720{
af6b6374 2721 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 2722 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 2723 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2724 size_t baselen, len = skb->len;
ae6a44e3
EK		 2725 struct ieee802_11_elems elems;
2726
15b7b062
KV		 2727 ifmgd = &sdata->u.mgd;
2728
77fdaa12
JB		 2729 ASSERT_MGD_MTX(ifmgd);
2730
b203ca39 2731 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
8e7cdbb6
TW		 2732 return; /* ignore ProbeResp to foreign address */
2733
ae6a44e3
EK		 2734 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2735 if (baselen > len)
2736 return;
2737
2738 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2739 &elems);
2740
d45c4172 2741 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
9859b81e 2742
77fdaa12 2743 if (ifmgd->associated &&
b203ca39 2744 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
4e5ff376 2745 ieee80211_reset_ap_probe(sdata);
66e67e41
JB		 2746
2747 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
b203ca39 2748 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
66e67e41 2749 /* got probe response, continue with auth */
bdcbd8e0 2750 sdata_info(sdata, "direct probe responded\n");
66e67e41
JB		 2751 ifmgd->auth_data->tries = 0;
2752 ifmgd->auth_data->timeout = jiffies;
89afe614 2753 ifmgd->auth_data->timeout_started = true;
66e67e41
JB		 2754 run_again(ifmgd, ifmgd->auth_data->timeout);
2755 }
f0706e82
JB		 2756}
2757
d91f36db
JB		 2758/*
2759 * This is the canonical list of information elements we care about,
2760 * the filter code also gives us all changes to the Microsoft OUI
2761 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2762 *
2763 * We implement beacon filtering in software since that means we can
2764 * avoid processing the frame here and in cfg80211, and userspace
2765 * will not be able to tell whether the hardware supports it or not.
2766 *
2767 * XXX: This list needs to be dynamic -- userspace needs to be able to
2768 * add items it requires. It also needs to be able to tell us to
2769 * look out for other vendor IEs.
2770 */
2771static const u64 care_about_ies =
1d4df3a5
JB		 2772 (1ULL << WLAN_EID_COUNTRY) |
2773 (1ULL << WLAN_EID_ERP_INFO) |
2774 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2775 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2776 (1ULL << WLAN_EID_HT_CAPABILITY) |
074d46d1 2777 (1ULL << WLAN_EID_HT_OPERATION);
d91f36db 2778
30eb1dc2
JB		 2779static enum rx_mgmt_action
2780ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
2781 struct ieee80211_mgmt *mgmt, size_t len,
2782 u8 *deauth_buf, struct ieee80211_rx_status *rx_status)
f0706e82 2783{
d91f36db 2784 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 2785 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 2786 size_t baselen;
2787 struct ieee802_11_elems elems;
f698d856 2788 struct ieee80211_local *local = sdata->local;
55de908a
JB		 2789 struct ieee80211_chanctx_conf *chanctx_conf;
2790 struct ieee80211_channel *chan;
bee7f586 2791 struct sta_info *sta;
471b3efd 2792 u32 changed = 0;
f87ad637 2793 bool erp_valid;
7a5158ef 2794 u8 erp_value = 0;
d91f36db 2795 u32 ncrc;
77fdaa12
JB		 2796 u8 *bssid;
2797
66e67e41 2798 lockdep_assert_held(&ifmgd->mtx);
f0706e82 2799
ae6a44e3
EK		 2800 /* Process beacon from the current BSS */
2801 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2802 if (baselen > len)
30eb1dc2 2803 return RX_MGMT_NONE;
ae6a44e3 2804
55de908a
JB		 2805 rcu_read_lock();
2806 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2807 if (!chanctx_conf) {
2808 rcu_read_unlock();
30eb1dc2 2809 return RX_MGMT_NONE;
55de908a
JB		 2810 }
2811
4bf88530 2812 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
55de908a 2813 rcu_read_unlock();
30eb1dc2 2814 return RX_MGMT_NONE;
55de908a 2815 }
4bf88530 2816 chan = chanctx_conf->def.chan;
55de908a 2817 rcu_read_unlock();
f0706e82 2818
c65dd147 2819 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
b203ca39 2820 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
66e67e41
JB		 2821 ieee802_11_parse_elems(mgmt->u.beacon.variable,
2822 len - baselen, &elems);
77fdaa12 2823
d45c4172 2824 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
66e67e41 2825 ifmgd->assoc_data->have_beacon = true;
c65dd147 2826 ifmgd->assoc_data->need_beacon = false;
ef429dad
JB		 2827 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
2828 sdata->vif.bss_conf.sync_tsf =
2829 le64_to_cpu(mgmt->u.beacon.timestamp);
2830 sdata->vif.bss_conf.sync_device_ts =
2831 rx_status->device_timestamp;
2832 if (elems.tim)
2833 sdata->vif.bss_conf.sync_dtim_count =
2834 elems.tim->dtim_count;
2835 else
2836 sdata->vif.bss_conf.sync_dtim_count = 0;
2837 }
66e67e41
JB		 2838 /* continue assoc process */
2839 ifmgd->assoc_data->timeout = jiffies;
89afe614 2840 ifmgd->assoc_data->timeout_started = true;
66e67e41 2841 run_again(ifmgd, ifmgd->assoc_data->timeout);
30eb1dc2 2842 return RX_MGMT_NONE;
66e67e41 2843 }
77fdaa12 2844
66e67e41 2845 if (!ifmgd->associated ||
b203ca39 2846 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
30eb1dc2 2847 return RX_MGMT_NONE;
66e67e41 2848 bssid = ifmgd->associated->bssid;
f0706e82 2849
17e4ec14
JM		 2850 /* Track average RSSI from the Beacon frames of the current AP */
2851 ifmgd->last_beacon_signal = rx_status->signal;
2852 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
2853 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3ba06c6f 2854 ifmgd->ave_beacon_signal = rx_status->signal * 16;
17e4ec14 2855 ifmgd->last_cqm_event_signal = 0;
391a200a 2856 ifmgd->count_beacon_signal = 1;
615f7b9b 2857 ifmgd->last_ave_beacon_signal = 0;
17e4ec14
JM		 2858 } else {
2859 ifmgd->ave_beacon_signal =
2860 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
2861 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
2862 ifmgd->ave_beacon_signal) / 16;
391a200a 2863 ifmgd->count_beacon_signal++;
17e4ec14 2864 }
615f7b9b
MV		 2865
2866 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
2867 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
2868 int sig = ifmgd->ave_beacon_signal;
2869 int last_sig = ifmgd->last_ave_beacon_signal;
2870
2871 /*
2872 * if signal crosses either of the boundaries, invoke callback
2873 * with appropriate parameters
2874 */
2875 if (sig > ifmgd->rssi_max_thold &&
2876 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
2877 ifmgd->last_ave_beacon_signal = sig;
887da917 2878 drv_rssi_callback(local, sdata, RSSI_EVENT_HIGH);
615f7b9b
MV		 2879 } else if (sig < ifmgd->rssi_min_thold &&
2880 (last_sig >= ifmgd->rssi_max_thold ||
2881 last_sig == 0)) {
2882 ifmgd->last_ave_beacon_signal = sig;
887da917 2883 drv_rssi_callback(local, sdata, RSSI_EVENT_LOW);
615f7b9b
MV		 2884 }
2885 }
2886
17e4ec14 2887 if (bss_conf->cqm_rssi_thold &&
391a200a 2888 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
ea086359 2889 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
17e4ec14
JM		 2890 int sig = ifmgd->ave_beacon_signal / 16;
2891 int last_event = ifmgd->last_cqm_event_signal;
2892 int thold = bss_conf->cqm_rssi_thold;
2893 int hyst = bss_conf->cqm_rssi_hyst;
2894 if (sig < thold &&
2895 (last_event == 0 || sig < last_event - hyst)) {
2896 ifmgd->last_cqm_event_signal = sig;
2897 ieee80211_cqm_rssi_notify(
2898 &sdata->vif,
2899 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
2900 GFP_KERNEL);
2901 } else if (sig > thold &&
2902 (last_event == 0 || sig > last_event + hyst)) {
2903 ifmgd->last_cqm_event_signal = sig;
2904 ieee80211_cqm_rssi_notify(
2905 &sdata->vif,
2906 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
2907 GFP_KERNEL);
2908 }
2909 }
2910
b291ba11 2911 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
bdcbd8e0 2912 mlme_dbg_ratelimited(sdata,
112c31f0 2913 "cancelling AP probe due to a received beacon\n");
925e64c3 2914 mutex_lock(&local->mtx);
b291ba11 2915 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
925e64c3
SG		 2916 ieee80211_run_deferred_scan(local);
2917 mutex_unlock(&local->mtx);
2918
4e751843
JB		 2919 mutex_lock(&local->iflist_mtx);
2920 ieee80211_recalc_ps(local, -1);
2921 mutex_unlock(&local->iflist_mtx);
92778180
JM		 2922 }
2923
b291ba11
JB		 2924 /*
2925 * Push the beacon loss detection into the future since
2926 * we are processing a beacon from the AP just now.
2927 */
d3a910a8 2928 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 2929
d91f36db
JB		 2930 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
2931 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
2932 len - baselen, &elems,
2933 care_about_ies, ncrc);
2934
25c9c875 2935 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
f87ad637
RR		 2936 bool directed_tim = ieee80211_check_tim(elems.tim,
2937 elems.tim_len,
2938 ifmgd->aid);
1fb3606b 2939 if (directed_tim) {
572e0012 2940 if (local->hw.conf.dynamic_ps_timeout > 0) {
70b12f26
RW		 2941 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2942 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2943 ieee80211_hw_config(local,
2944 IEEE80211_CONF_CHANGE_PS);
2945 }
572e0012 2946 ieee80211_send_nullfunc(local, sdata, 0);
6f0756a3 2947 } else if (!local->pspolling && sdata->u.mgd.powersave) {
572e0012
KV		 2948 local->pspolling = true;
2949
2950 /*
2951 * Here is assumed that the driver will be
2952 * able to send ps-poll frame and receive a
2953 * response even though power save mode is
2954 * enabled, but some drivers might require
2955 * to disable power save here. This needs
2956 * to be investigated.
2957 */
2958 ieee80211_send_pspoll(local, sdata);
2959 }
a97b77b9
VN		 2960 }
2961 }
7a5158ef 2962
488dd7b5
JB		 2963 if (sdata->vif.p2p) {
2964 u8 noa[2];
2965 int ret;
2966
2967 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
2968 len - baselen,
2969 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
2970 noa, sizeof(noa));
2971 if (ret >= 2 && sdata->u.mgd.p2p_noa_index != noa[0]) {
2972 bss_conf->p2p_oppps = noa[1] & 0x80;
2973 bss_conf->p2p_ctwindow = noa[1] & 0x7f;
2974 changed |= BSS_CHANGED_P2P_PS;
2975 sdata->u.mgd.p2p_noa_index = noa[0];
2976 /*
2977 * make sure we update all information, the CRC
2978 * mechanism doesn't look at P2P attributes.
2979 */
2980 ifmgd->beacon_crc_valid = false;
2981 }
2982 }
2983
d8ec4433 2984 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
30eb1dc2 2985 return RX_MGMT_NONE;
30196673 2986 ifmgd->beacon_crc = ncrc;
d8ec4433 2987 ifmgd->beacon_crc_valid = true;
30196673 2988
d45c4172 2989 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
7d25745d
JB		 2990
2991 if (ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2992 elems.wmm_param_len))
2993 changed |= BSS_CHANGED_QOS;
2994
c65dd147
EG		 2995 /*
2996 * If we haven't had a beacon before, tell the driver about the
ef429dad 2997 * DTIM period (and beacon timing if desired) now.
c65dd147
EG		 2998 */
2999 if (!bss_conf->dtim_period) {
3000 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3001 if (elems.tim)
3002 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3003 else
3004 bss_conf->dtim_period = 1;
ef429dad
JB		 3005
3006 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3007 sdata->vif.bss_conf.sync_tsf =
3008 le64_to_cpu(mgmt->u.beacon.timestamp);
3009 sdata->vif.bss_conf.sync_device_ts =
3010 rx_status->device_timestamp;
3011 if (elems.tim)
3012 sdata->vif.bss_conf.sync_dtim_count =
3013 elems.tim->dtim_count;
3014 else
3015 sdata->vif.bss_conf.sync_dtim_count = 0;
3016 }
3017
c65dd147
EG		 3018 changed |= BSS_CHANGED_DTIM_PERIOD;
3019 }
3020
7a5158ef
JB		 3021 if (elems.erp_info && elems.erp_info_len >= 1) {
3022 erp_valid = true;
3023 erp_value = elems.erp_info[0];
3024 } else {
3025 erp_valid = false;
50c4afb9 3026 }
7a5158ef
JB		 3027 changed |= ieee80211_handle_bss_capability(sdata,
3028 le16_to_cpu(mgmt->u.beacon.capab_info),
3029 erp_valid, erp_value);
f0706e82 3030
1128958d 3031 mutex_lock(&local->sta_mtx);
bee7f586
JB		 3032 sta = sta_info_get(sdata, bssid);
3033
30eb1dc2
JB		 3034 if (ieee80211_config_bw(sdata, sta, elems.ht_operation,
3035 elems.vht_operation, bssid, &changed)) {
3036 mutex_unlock(&local->sta_mtx);
3037 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3038 WLAN_REASON_DEAUTH_LEAVING,
3039 true, deauth_buf);
3040 return RX_MGMT_CFG80211_TX_DEAUTH;
3041 }
bee7f586
JB		 3042
3043 if (sta && elems.opmode_notif)
3044 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3045 rx_status->band, true);
1128958d 3046 mutex_unlock(&local->sta_mtx);
d3c990fb 3047
04b7b2ff
JB		 3048 if (elems.country_elem && elems.pwr_constr_elem &&
3049 mgmt->u.probe_resp.capab_info &
3050 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT))
1ea6f9c0
JB		 3051 changed |= ieee80211_handle_pwr_constr(sdata, chan,
3052 elems.country_elem,
3053 elems.country_elem_len,
3054 elems.pwr_constr_elem);
3f2355cb 3055
471b3efd 3056 ieee80211_bss_info_change_notify(sdata, changed);
30eb1dc2
JB		 3057
3058 return RX_MGMT_NONE;
f0706e82
JB		 3059}
3060
1fa57d01
JB		 3061void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3062 struct sk_buff *skb)
f0706e82 3063{
77fdaa12 3064 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 3065 struct ieee80211_rx_status *rx_status;
f0706e82 3066 struct ieee80211_mgmt *mgmt;
66e67e41 3067 struct cfg80211_bss *bss = NULL;
77fdaa12 3068 enum rx_mgmt_action rma = RX_MGMT_NONE;
30eb1dc2 3069 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
f0706e82
JB		 3070 u16 fc;
3071
f0706e82
JB		 3072 rx_status = (struct ieee80211_rx_status *) skb->cb;
3073 mgmt = (struct ieee80211_mgmt *) skb->data;
3074 fc = le16_to_cpu(mgmt->frame_control);
3075
77fdaa12
JB		 3076 mutex_lock(&ifmgd->mtx);
3077
66e67e41
JB		 3078 switch (fc & IEEE80211_FCTL_STYPE) {
3079 case IEEE80211_STYPE_BEACON:
30eb1dc2
JB		 3080 rma = ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
3081 deauth_buf, rx_status);
66e67e41
JB		 3082 break;
3083 case IEEE80211_STYPE_PROBE_RESP:
3084 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3085 break;
3086 case IEEE80211_STYPE_AUTH:
3087 rma = ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3088 break;
3089 case IEEE80211_STYPE_DEAUTH:
3090 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3091 break;
3092 case IEEE80211_STYPE_DISASSOC:
3093 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3094 break;
3095 case IEEE80211_STYPE_ASSOC_RESP:
3096 case IEEE80211_STYPE_REASSOC_RESP:
3097 rma = ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, &bss);
3098 break;
3099 case IEEE80211_STYPE_ACTION:
3100 switch (mgmt->u.action.category) {
3101 case WLAN_CATEGORY_SPECTRUM_MGMT:
3102 ieee80211_sta_process_chanswitch(sdata,
3103 &mgmt->u.action.u.chan_switch.sw_elem,
3104 (void *)ifmgd->associated->priv,
3105 rx_status->mactime);
77fdaa12 3106 break;
77fdaa12 3107 }
77fdaa12 3108 }
77fdaa12
JB		 3109 mutex_unlock(&ifmgd->mtx);
3110
66e67e41
JB		 3111 switch (rma) {
3112 case RX_MGMT_NONE:
3113 /* no action */
3114 break;
3115 case RX_MGMT_CFG80211_DEAUTH:
ce470613 3116 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
66e67e41
JB		 3117 break;
3118 case RX_MGMT_CFG80211_DISASSOC:
3119 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
3120 break;
3121 case RX_MGMT_CFG80211_RX_AUTH:
3122 cfg80211_send_rx_auth(sdata->dev, (u8 *)mgmt, skb->len);
3123 break;
3124 case RX_MGMT_CFG80211_RX_ASSOC:
3125 cfg80211_send_rx_assoc(sdata->dev, bss, (u8 *)mgmt, skb->len);
3126 break;
3127 case RX_MGMT_CFG80211_ASSOC_TIMEOUT:
3128 cfg80211_send_assoc_timeout(sdata->dev, mgmt->bssid);
3129 break;
30eb1dc2
JB		 3130 case RX_MGMT_CFG80211_TX_DEAUTH:
3131 cfg80211_send_deauth(sdata->dev, deauth_buf,
3132 sizeof(deauth_buf));
3133 break;
66e67e41
JB		 3134 default:
3135 WARN(1, "unexpected: %d", rma);
b054b747 3136 }
f0706e82
JB		 3137}
3138
9c6bd790 3139static void ieee80211_sta_timer(unsigned long data)
f0706e82 3140{
60f8b39c
JB		 3141 struct ieee80211_sub_if_data *sdata =
3142 (struct ieee80211_sub_if_data *) data;
46900298 3143 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
60f8b39c 3144 struct ieee80211_local *local = sdata->local;
f0706e82 3145
5bb644a0
JB		 3146 if (local->quiescing) {
3147 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
3148 return;
3149 }
3150
64592c8f 3151 ieee80211_queue_work(&local->hw, &sdata->work);
f0706e82
JB		 3152}
3153
04ac3c0e 3154static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
6b684db1 3155 u8 *bssid, u8 reason, bool tx)
04ac3c0e 3156{
04ac3c0e 3157 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 3158 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
04ac3c0e 3159
37ad3888 3160 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
6b684db1 3161 tx, frame_buf);
04ac3c0e 3162 mutex_unlock(&ifmgd->mtx);
37ad3888 3163
04ac3c0e
FF		 3164 /*
3165 * must be outside lock due to cfg80211,
3166 * but that's not a problem.
3167 */
6ae16775 3168 cfg80211_send_deauth(sdata->dev, frame_buf, IEEE80211_DEAUTH_FRAME_LEN);
fcac4fb0 3169
04ac3c0e
FF		 3170 mutex_lock(&ifmgd->mtx);
3171}
3172
66e67e41
JB		 3173static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
3174{
3175 struct ieee80211_local *local = sdata->local;
3176 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3177 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
1672c0e3 3178 u32 tx_flags = 0;
66e67e41
JB		 3179
3180 lockdep_assert_held(&ifmgd->mtx);
3181
3182 if (WARN_ON_ONCE(!auth_data))
3183 return -EINVAL;
3184
1672c0e3
JB		 3185 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3186 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3187 IEEE80211_TX_INTFL_MLME_CONN_TX;
3188
66e67e41
JB		 3189 auth_data->tries++;
3190
3191 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
bdcbd8e0
JB		 3192 sdata_info(sdata, "authentication with %pM timed out\n",
3193 auth_data->bss->bssid);
66e67e41
JB		 3194
3195 /*
3196 * Most likely AP is not in the range so remove the
3197 * bss struct for that AP.
3198 */
3199 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3200
3201 return -ETIMEDOUT;
3202 }
3203
a1845fc7
JB		 3204 drv_mgd_prepare_tx(local, sdata);
3205
66e67e41 3206 if (auth_data->bss->proberesp_ies) {
6b8ece3a
JM		 3207 u16 trans = 1;
3208 u16 status = 0;
3209
bdcbd8e0
JB		 3210 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3211 auth_data->bss->bssid, auth_data->tries,
3212 IEEE80211_AUTH_MAX_TRIES);
66e67e41
JB		 3213
3214 auth_data->expected_transaction = 2;
6b8ece3a
JM		 3215
3216 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3217 trans = auth_data->sae_trans;
3218 status = auth_data->sae_status;
3219 auth_data->expected_transaction = trans;
3220 }
3221
3222 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3223 auth_data->data, auth_data->data_len,
66e67e41 3224 auth_data->bss->bssid,
1672c0e3
JB		 3225 auth_data->bss->bssid, NULL, 0, 0,
3226 tx_flags);
66e67e41
JB		 3227 } else {
3228 const u8 *ssidie;
3229
bdcbd8e0
JB		 3230 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
3231 auth_data->bss->bssid, auth_data->tries,
3232 IEEE80211_AUTH_MAX_TRIES);
66e67e41 3233
9caf0364 3234 rcu_read_lock();
66e67e41 3235 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
9caf0364
JB		 3236 if (!ssidie) {
3237 rcu_read_unlock();
66e67e41 3238 return -EINVAL;
9caf0364 3239 }
66e67e41
JB		 3240 /*
3241 * Direct probe is sent to broadcast address as some APs
3242 * will not answer to direct packet in unassociated state.
3243 */
3244 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
1672c0e3 3245 NULL, 0, (u32) -1, true, tx_flags,
55de908a 3246 auth_data->bss->channel, false);
9caf0364 3247 rcu_read_unlock();
66e67e41
JB		 3248 }
3249
1672c0e3
JB		 3250 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
3251 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
89afe614 3252 ifmgd->auth_data->timeout_started = true;
1672c0e3 3253 run_again(ifmgd, auth_data->timeout);
89afe614
JB		 3254 } else {
3255 auth_data->timeout_started = false;
1672c0e3 3256 }
66e67e41
JB		 3257
3258 return 0;
3259}
3260
3261static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3262{
3263 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3264 struct ieee80211_local *local = sdata->local;
3265
3266 lockdep_assert_held(&sdata->u.mgd.mtx);
3267
66e67e41
JB		 3268 assoc_data->tries++;
3269 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
bdcbd8e0
JB		 3270 sdata_info(sdata, "association with %pM timed out\n",
3271 assoc_data->bss->bssid);
66e67e41
JB		 3272
3273 /*
3274 * Most likely AP is not in the range so remove the
3275 * bss struct for that AP.
3276 */
3277 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3278
3279 return -ETIMEDOUT;
3280 }
3281
bdcbd8e0
JB		 3282 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3283 assoc_data->bss->bssid, assoc_data->tries,
3284 IEEE80211_ASSOC_MAX_TRIES);
66e67e41
JB		 3285 ieee80211_send_assoc(sdata);
3286
1672c0e3
JB		 3287 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
3288 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
89afe614 3289 assoc_data->timeout_started = true;
1672c0e3 3290 run_again(&sdata->u.mgd, assoc_data->timeout);
89afe614
JB		 3291 } else {
3292 assoc_data->timeout_started = false;
1672c0e3 3293 }
66e67e41
JB		 3294
3295 return 0;
3296}
3297
1672c0e3
JB		 3298void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3299 __le16 fc, bool acked)
3300{
3301 struct ieee80211_local *local = sdata->local;
3302
3303 sdata->u.mgd.status_fc = fc;
3304 sdata->u.mgd.status_acked = acked;
3305 sdata->u.mgd.status_received = true;
3306
3307 ieee80211_queue_work(&local->hw, &sdata->work);
3308}
3309
1fa57d01 3310void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 3311{
9c6bd790 3312 struct ieee80211_local *local = sdata->local;
1fa57d01 3313 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 3314
77fdaa12
JB		 3315 mutex_lock(&ifmgd->mtx);
3316
1672c0e3
JB		 3317 if (ifmgd->status_received) {
3318 __le16 fc = ifmgd->status_fc;
3319 bool status_acked = ifmgd->status_acked;
3320
3321 ifmgd->status_received = false;
3322 if (ifmgd->auth_data &&
3323 (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) {
3324 if (status_acked) {
3325 ifmgd->auth_data->timeout =
3326 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3327 run_again(ifmgd, ifmgd->auth_data->timeout);
3328 } else {
3329 ifmgd->auth_data->timeout = jiffies - 1;
3330 }
89afe614 3331 ifmgd->auth_data->timeout_started = true;
1672c0e3
JB		 3332 } else if (ifmgd->assoc_data &&
3333 (ieee80211_is_assoc_req(fc) ||
3334 ieee80211_is_reassoc_req(fc))) {
3335 if (status_acked) {
3336 ifmgd->assoc_data->timeout =
3337 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3338 run_again(ifmgd, ifmgd->assoc_data->timeout);
3339 } else {
3340 ifmgd->assoc_data->timeout = jiffies - 1;
3341 }
89afe614 3342 ifmgd->assoc_data->timeout_started = true;
1672c0e3
JB		 3343 }
3344 }
3345
89afe614 3346 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
66e67e41
JB		 3347 time_after(jiffies, ifmgd->auth_data->timeout)) {
3348 if (ifmgd->auth_data->done) {
3349 /*
3350 * ok ... we waited for assoc but userspace didn't,
3351 * so let's just kill the auth data
3352 */
3353 ieee80211_destroy_auth_data(sdata, false);
3354 } else if (ieee80211_probe_auth(sdata)) {
3355 u8 bssid[ETH_ALEN];
3356
3357 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3358
3359 ieee80211_destroy_auth_data(sdata, false);
3360
3361 mutex_unlock(&ifmgd->mtx);
3362 cfg80211_send_auth_timeout(sdata->dev, bssid);
3363 mutex_lock(&ifmgd->mtx);
3364 }
89afe614 3365 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
66e67e41
JB		 3366 run_again(ifmgd, ifmgd->auth_data->timeout);
3367
89afe614 3368 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
66e67e41 3369 time_after(jiffies, ifmgd->assoc_data->timeout)) {
c65dd147
EG		 3370 if ((ifmgd->assoc_data->need_beacon &&
3371 !ifmgd->assoc_data->have_beacon) ||
66e67e41
JB		 3372 ieee80211_do_assoc(sdata)) {
3373 u8 bssid[ETH_ALEN];
3374
3375 memcpy(bssid, ifmgd->assoc_data->bss->bssid, ETH_ALEN);
3376
3377 ieee80211_destroy_assoc_data(sdata, false);
3378
3379 mutex_unlock(&ifmgd->mtx);
3380 cfg80211_send_assoc_timeout(sdata->dev, bssid);
3381 mutex_lock(&ifmgd->mtx);
3382 }
89afe614 3383 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
66e67e41
JB		 3384 run_again(ifmgd, ifmgd->assoc_data->timeout);
3385
b291ba11
JB		 3386 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
3387 IEEE80211_STA_CONNECTION_POLL) &&
3388 ifmgd->associated) {
a43abf29 3389 u8 bssid[ETH_ALEN];
72a8a3ed 3390 int max_tries;
a43abf29 3391
0c1ad2ca 3392 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 3393
72a8a3ed 3394 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
180205bd 3395 max_tries = max_nullfunc_tries;
72a8a3ed 3396 else
180205bd 3397 max_tries = max_probe_tries;
72a8a3ed 3398
4e5ff376
FF		 3399 /* ACK received for nullfunc probing frame */
3400 if (!ifmgd->probe_send_count)
3401 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 3402 else if (ifmgd->nullfunc_failed) {
3403 if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3404 mlme_dbg(sdata,
3405 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3406 bssid, ifmgd->probe_send_count,
3407 max_tries);
04ac3c0e
FF		 3408 ieee80211_mgd_probe_ap_send(sdata);
3409 } else {
bdcbd8e0
JB		 3410 mlme_dbg(sdata,
3411 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3412 bssid);
95acac61 3413 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1
JB		 3414 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3415 false);
04ac3c0e
FF		 3416 }
3417 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
b291ba11 3418 run_again(ifmgd, ifmgd->probe_timeout);
04ac3c0e 3419 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
bdcbd8e0
JB		 3420 mlme_dbg(sdata,
3421 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3422 bssid, probe_wait_ms);
95acac61 3423 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 3424 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
04ac3c0e 3425 } else if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3426 mlme_dbg(sdata,
3427 "No probe response from AP %pM after %dms, try %d/%i\n",
3428 bssid, probe_wait_ms,
3429 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 3430 ieee80211_mgd_probe_ap_send(sdata);
3431 } else {
b291ba11
JB		 3432 /*
3433 * We actually lost the connection ... or did we?
3434 * Let's make sure!
3435 */
b38afa87
BG		 3436 wiphy_debug(local->hw.wiphy,
3437 "%s: No probe response from AP %pM"
3438 " after %dms, disconnecting.\n",
3439 sdata->name,
180205bd 3440 bssid, probe_wait_ms);
04ac3c0e 3441
95acac61 3442 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 3443 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
b291ba11
JB		 3444 }
3445 }
3446
77fdaa12 3447 mutex_unlock(&ifmgd->mtx);
f0706e82
JB		 3448}
3449
b291ba11
JB		 3450static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3451{
3452 struct ieee80211_sub_if_data *sdata =
3453 (struct ieee80211_sub_if_data *) data;
3454 struct ieee80211_local *local = sdata->local;
3455
3456 if (local->quiescing)
3457 return;
3458
682bd38b 3459 sdata->u.mgd.connection_loss = false;
1e4dcd01
JO		 3460 ieee80211_queue_work(&sdata->local->hw,
3461 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 3462}
3463
3464static void ieee80211_sta_conn_mon_timer(unsigned long data)
3465{
3466 struct ieee80211_sub_if_data *sdata =
3467 (struct ieee80211_sub_if_data *) data;
3468 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3469 struct ieee80211_local *local = sdata->local;
3470
3471 if (local->quiescing)
3472 return;
3473
42935eca 3474 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 3475}
3476
3477static void ieee80211_sta_monitor_work(struct work_struct *work)
3478{
3479 struct ieee80211_sub_if_data *sdata =
3480 container_of(work, struct ieee80211_sub_if_data,
3481 u.mgd.monitor_work);
3482
3483 ieee80211_mgd_probe_ap(sdata, false);
3484}
3485
9c6bd790
JB		 3486static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3487{
494f1fe5
EP		 3488 u32 flags;
3489
ad935687 3490 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
925e64c3 3491 __ieee80211_stop_poll(sdata);
ad935687 3492
b291ba11 3493 /* let's probe the connection once */
494f1fe5
EP		 3494 flags = sdata->local->hw.flags;
3495 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3496 ieee80211_queue_work(&sdata->local->hw,
3497 &sdata->u.mgd.monitor_work);
b291ba11 3498 /* and do all the other regular work too */
64592c8f 3499 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 3500 }
9c6bd790 3501}
f0706e82 3502
5bb644a0
JB		 3503#ifdef CONFIG_PM
3504void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
3505{
3506 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3507
9b5bd5a4
BG		 3508 /*
3509 * Stop timers before deleting work items, as timers
3510 * could race and re-add the work-items. They will be
3511 * re-established on connection.
3512 */
3513 del_timer_sync(&ifmgd->conn_mon_timer);
3514 del_timer_sync(&ifmgd->bcn_mon_timer);
3515
5bb644a0
JB		 3516 /*
3517 * we need to use atomic bitops for the running bits
3518 * only because both timers might fire at the same
3519 * time -- the code here is properly synchronised.
3520 */
3521
d1f5b7a3
JB		 3522 cancel_work_sync(&ifmgd->request_smps_work);
3523
0ecfe806 3524 cancel_work_sync(&ifmgd->monitor_work);
1e4dcd01 3525 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
882a7c69 3526 cancel_work_sync(&ifmgd->csa_connection_drop_work);
5bb644a0
JB		 3527 if (del_timer_sync(&ifmgd->timer))
3528 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
3529
5bb644a0
JB		 3530 if (del_timer_sync(&ifmgd->chswitch_timer))
3531 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
9b5bd5a4 3532 cancel_work_sync(&ifmgd->chswitch_work);
5bb644a0
JB		 3533}
3534
3535void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
3536{
3537 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3538
782d2673
JB		 3539 mutex_lock(&ifmgd->mtx);
3540 if (!ifmgd->associated) {
3541 mutex_unlock(&ifmgd->mtx);
676b58c2 3542 return;
782d2673 3543 }
676b58c2 3544
95acac61
JB		 3545 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
3546 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
782d2673
JB		 3547 mlme_dbg(sdata, "driver requested disconnect after resume\n");
3548 ieee80211_sta_connection_lost(sdata,
3549 ifmgd->associated->bssid,
6b684db1
JB		 3550 WLAN_REASON_UNSPECIFIED,
3551 true);
95acac61 3552 mutex_unlock(&ifmgd->mtx);
782d2673 3553 return;
95acac61 3554 }
782d2673 3555 mutex_unlock(&ifmgd->mtx);
95acac61 3556
5bb644a0
JB		 3557 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
3558 add_timer(&ifmgd->timer);
3559 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
3560 add_timer(&ifmgd->chswitch_timer);
c8a7972c 3561 ieee80211_sta_reset_beacon_monitor(sdata);
925e64c3
SG		 3562
3563 mutex_lock(&sdata->local->mtx);
46090979 3564 ieee80211_restart_sta_timer(sdata);
925e64c3 3565 mutex_unlock(&sdata->local->mtx);
5bb644a0
JB		 3566}
3567#endif
3568
9c6bd790
JB		 3569/* interface setup */
3570void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 3571{
46900298 3572 struct ieee80211_if_managed *ifmgd;
988c0f72 3573
46900298 3574 ifmgd = &sdata->u.mgd;
b291ba11 3575 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 3576 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 3577 INIT_WORK(&ifmgd->beacon_connection_loss_work,
3578 ieee80211_beacon_connection_loss_work);
882a7c69
JB		 3579 INIT_WORK(&ifmgd->csa_connection_drop_work,
3580 ieee80211_csa_connection_drop_work);
d1f5b7a3 3581 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
46900298 3582 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 3583 (unsigned long) sdata);
b291ba11
JB		 3584 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
3585 (unsigned long) sdata);
3586 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
3587 (unsigned long) sdata);
46900298 3588 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 3589 (unsigned long) sdata);
9c6bd790 3590
ab1faead 3591 ifmgd->flags = 0;
1478acb3 3592 ifmgd->powersave = sdata->wdev.ps;
dc41e4d4
EP		 3593 ifmgd->uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
3594 ifmgd->uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
bbbdff9e 3595
77fdaa12 3596 mutex_init(&ifmgd->mtx);
0f78231b
JB		 3597
3598 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
3599 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
3600 else
3601 ifmgd->req_smps = IEEE80211_SMPS_OFF;
f0706e82
JB		 3602}
3603
77fdaa12
JB		 3604/* scan finished notification */
3605void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 3606{
31ee67a1 3607 struct ieee80211_sub_if_data *sdata;
60f8b39c 3608
77fdaa12
JB		 3609 /* Restart STA timers */
3610 rcu_read_lock();
370bd005
BG		 3611 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3612 if (ieee80211_sdata_running(sdata))
3613 ieee80211_restart_sta_timer(sdata);
3614 }
77fdaa12
JB		 3615 rcu_read_unlock();
3616}
60f8b39c 3617
77fdaa12
JB		 3618int ieee80211_max_network_latency(struct notifier_block *nb,
3619 unsigned long data, void *dummy)
3620{
3621 s32 latency_usec = (s32) data;
3622 struct ieee80211_local *local =
3623 container_of(nb, struct ieee80211_local,
3624 network_latency_notifier);
1fa6f4af 3625
77fdaa12
JB		 3626 mutex_lock(&local->iflist_mtx);
3627 ieee80211_recalc_ps(local, latency_usec);
3628 mutex_unlock(&local->iflist_mtx);
dfe67012 3629
77fdaa12 3630 return 0;
9c6bd790
JB		 3631}
3632
f2d9d270
JB		 3633static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
3634 struct cfg80211_bss *cbss)
3635{
3636 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3637 const u8 *ht_cap_ie, *vht_cap_ie;
3638 const struct ieee80211_ht_cap *ht_cap;
3639 const struct ieee80211_vht_cap *vht_cap;
3640 u8 chains = 1;
3641
3642 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
3643 return chains;
3644
9caf0364 3645 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
f2d9d270
JB		 3646 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
3647 ht_cap = (void *)(ht_cap_ie + 2);
3648 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
3649 /*
3650 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
3651 * "Tx Unequal Modulation Supported" fields.
3652 */
3653 }
3654
3655 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
3656 return chains;
3657
9caf0364 3658 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
f2d9d270
JB		 3659 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
3660 u8 nss;
3661 u16 tx_mcs_map;
3662
3663 vht_cap = (void *)(vht_cap_ie + 2);
3664 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
3665 for (nss = 8; nss > 0; nss--) {
3666 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
3667 IEEE80211_VHT_MCS_NOT_SUPPORTED)
3668 break;
3669 }
3670 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
3671 chains = max(chains, nss);
3672 }
3673
3674 return chains;
3675}
3676
b17166a7
JB		 3677static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
3678 struct cfg80211_bss *cbss)
a1cf775d
JB		 3679{
3680 struct ieee80211_local *local = sdata->local;
3681 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
24398e39 3682 const struct ieee80211_ht_operation *ht_oper = NULL;
f2d9d270 3683 const struct ieee80211_vht_operation *vht_oper = NULL;
24398e39 3684 struct ieee80211_supported_band *sband;
4bf88530 3685 struct cfg80211_chan_def chandef;
f2d9d270 3686 int ret;
a1cf775d 3687
24398e39
JB		 3688 sband = local->hw.wiphy->bands[cbss->channel->band];
3689
f2d9d270
JB		 3690 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
3691 IEEE80211_STA_DISABLE_80P80MHZ |
3692 IEEE80211_STA_DISABLE_160MHZ);
3693
9caf0364
JB		 3694 rcu_read_lock();
3695
f2d9d270
JB		 3696 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3697 sband->ht_cap.ht_supported) {
08e6effa 3698 const u8 *ht_oper_ie, *ht_cap;
24398e39 3699
9caf0364 3700 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
24398e39
JB		 3701 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3702 ht_oper = (void *)(ht_oper_ie + 2);
08e6effa
JB		 3703
3704 ht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
3705 if (!ht_cap || ht_cap[1] < sizeof(struct ieee80211_ht_cap)) {
3706 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3707 ht_oper = NULL;
3708 }
24398e39
JB		 3709 }
3710
f2d9d270
JB		 3711 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3712 sband->vht_cap.vht_supported) {
08e6effa 3713 const u8 *vht_oper_ie, *vht_cap;
f2d9d270 3714
9caf0364
JB		 3715 vht_oper_ie = ieee80211_bss_get_ie(cbss,
3716 WLAN_EID_VHT_OPERATION);
f2d9d270
JB		 3717 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
3718 vht_oper = (void *)(vht_oper_ie + 2);
3719 if (vht_oper && !ht_oper) {
3720 vht_oper = NULL;
bdcbd8e0 3721 sdata_info(sdata,
f2d9d270 3722 "AP advertised VHT without HT, disabling both\n");
cb145022
JB		 3723 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3724 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
24398e39 3725 }
08e6effa
JB		 3726
3727 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
3728 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
3729 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3730 vht_oper = NULL;
3731 }
24398e39
JB		 3732 }
3733
f2d9d270
JB		 3734 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
3735 cbss->channel,
3736 ht_oper, vht_oper,
30eb1dc2 3737 &chandef, true);
04ecd257 3738
f2d9d270
JB		 3739 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
3740 local->rx_chains);
24398e39 3741
9caf0364
JB		 3742 rcu_read_unlock();
3743
04ecd257
JB		 3744 /* will change later if needed */
3745 sdata->smps_mode = IEEE80211_SMPS_OFF;
3746
f2d9d270
JB		 3747 /*
3748 * If this fails (possibly due to channel context sharing
3749 * on incompatible channels, e.g. 80+80 and 160 sharing the
3750 * same control channel) try to use a smaller bandwidth.
3751 */
3752 ret = ieee80211_vif_use_channel(sdata, &chandef,
3753 IEEE80211_CHANCTX_SHARED);
d601cd8d 3754 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
f2d9d270 3755 ifmgd->flags |= chandef_downgrade(&chandef);
d601cd8d
JB		 3756 ret = ieee80211_vif_use_channel(sdata, &chandef,
3757 IEEE80211_CHANCTX_SHARED);
3758 }
f2d9d270 3759 return ret;
b17166a7
JB		 3760}
3761
3762static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
3763 struct cfg80211_bss *cbss, bool assoc)
3764{
3765 struct ieee80211_local *local = sdata->local;
3766 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3767 struct ieee80211_bss *bss = (void *)cbss->priv;
3768 struct sta_info *new_sta = NULL;
3769 bool have_sta = false;
3770 int err;
3771
3772 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3773 return -EINVAL;
3774
3775 if (assoc) {
3776 rcu_read_lock();
3777 have_sta = sta_info_get(sdata, cbss->bssid);
3778 rcu_read_unlock();
3779 }
3780
3781 if (!have_sta) {
3782 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
3783 if (!new_sta)
3784 return -ENOMEM;
3785 }
3786
13e0c8e3 3787 if (new_sta) {
5d6a1b06
JB		 3788 u32 rates = 0, basic_rates = 0;
3789 bool have_higher_than_11mbit;
3790 int min_rate = INT_MAX, min_rate_index = -1;
b17166a7 3791 struct ieee80211_supported_band *sband;
8cef2c9d 3792 const struct cfg80211_bss_ies *ies;
b17166a7
JB		 3793
3794 sband = local->hw.wiphy->bands[cbss->channel->band];
3795
3796 err = ieee80211_prep_channel(sdata, cbss);
3797 if (err) {
3798 sta_info_free(local, new_sta);
3799 return err;
3800 }
5d6a1b06 3801
5d6a1b06
JB		 3802 ieee80211_get_rates(sband, bss->supp_rates,
3803 bss->supp_rates_len,
3804 &rates, &basic_rates,
3805 &have_higher_than_11mbit,
3806 &min_rate, &min_rate_index);
3807
3808 /*
3809 * This used to be a workaround for basic rates missing
3810 * in the association response frame. Now that we no
3811 * longer use the basic rates from there, it probably
3812 * doesn't happen any more, but keep the workaround so
3813 * in case some *other* APs are buggy in different ways
3814 * we can connect -- with a warning.
3815 */
3816 if (!basic_rates && min_rate_index >= 0) {
bdcbd8e0
JB		 3817 sdata_info(sdata,
3818 "No basic rates, using min rate instead\n");
5d6a1b06
JB		 3819 basic_rates = BIT(min_rate_index);
3820 }
3821
13e0c8e3 3822 new_sta->sta.supp_rates[cbss->channel->band] = rates;
5d6a1b06
JB		 3823 sdata->vif.bss_conf.basic_rates = basic_rates;
3824
3825 /* cf. IEEE 802.11 9.2.12 */
55de908a 3826 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
5d6a1b06
JB		 3827 have_higher_than_11mbit)
3828 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3829 else
3830 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
3831
3832 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
3833
8c358bcd
JB		 3834 /* set timing information */
3835 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
8cef2c9d 3836 rcu_read_lock();
ef429dad
JB		 3837 ies = rcu_dereference(cbss->beacon_ies);
3838 if (ies) {
3839 const u8 *tim_ie;
3840
3841 sdata->vif.bss_conf.sync_tsf = ies->tsf;
3842 sdata->vif.bss_conf.sync_device_ts =
3843 bss->device_ts_beacon;
3844 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
3845 ies->data, ies->len);
3846 if (tim_ie && tim_ie[1] >= 2)
3847 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
3848 else
3849 sdata->vif.bss_conf.sync_dtim_count = 0;
3850 } else if (!(local->hw.flags &
3851 IEEE80211_HW_TIMING_BEACON_ONLY)) {
3852 ies = rcu_dereference(cbss->proberesp_ies);
3853 /* must be non-NULL since beacon IEs were NULL */
3854 sdata->vif.bss_conf.sync_tsf = ies->tsf;
3855 sdata->vif.bss_conf.sync_device_ts =
3856 bss->device_ts_presp;
3857 sdata->vif.bss_conf.sync_dtim_count = 0;
3858 } else {
3859 sdata->vif.bss_conf.sync_tsf = 0;
3860 sdata->vif.bss_conf.sync_device_ts = 0;
3861 sdata->vif.bss_conf.sync_dtim_count = 0;
3862 }
8cef2c9d 3863 rcu_read_unlock();
8c358bcd
JB		 3864
3865 /* tell driver about BSSID, basic rates and timing */
5d6a1b06 3866 ieee80211_bss_info_change_notify(sdata,
8c358bcd
JB		 3867 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
3868 BSS_CHANGED_BEACON_INT);
a1cf775d
JB		 3869
3870 if (assoc)
13e0c8e3 3871 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
a1cf775d 3872
13e0c8e3
JB		 3873 err = sta_info_insert(new_sta);
3874 new_sta = NULL;
a1cf775d 3875 if (err) {
bdcbd8e0
JB		 3876 sdata_info(sdata,
3877 "failed to insert STA entry for the AP (error %d)\n",
3878 err);
a1cf775d
JB		 3879 return err;
3880 }
3881 } else
b203ca39 3882 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
a1cf775d
JB		 3883
3884 return 0;
3885}
3886
77fdaa12
JB		 3887/* config hooks */
3888int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
3889 struct cfg80211_auth_request *req)
9c6bd790 3890{
66e67e41
JB		 3891 struct ieee80211_local *local = sdata->local;
3892 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3893 struct ieee80211_mgd_auth_data *auth_data;
77fdaa12 3894 u16 auth_alg;
66e67e41
JB		 3895 int err;
3896
3897 /* prepare auth data structure */
9c6bd790 3898
77fdaa12
JB		 3899 switch (req->auth_type) {
3900 case NL80211_AUTHTYPE_OPEN_SYSTEM:
3901 auth_alg = WLAN_AUTH_OPEN;
3902 break;
3903 case NL80211_AUTHTYPE_SHARED_KEY:
66e67e41 3904 if (IS_ERR(local->wep_tx_tfm))
9dca9c49 3905 return -EOPNOTSUPP;
77fdaa12
JB		 3906 auth_alg = WLAN_AUTH_SHARED_KEY;
3907 break;
3908 case NL80211_AUTHTYPE_FT:
3909 auth_alg = WLAN_AUTH_FT;
3910 break;
3911 case NL80211_AUTHTYPE_NETWORK_EAP:
3912 auth_alg = WLAN_AUTH_LEAP;
3913 break;
6b8ece3a
JM		 3914 case NL80211_AUTHTYPE_SAE:
3915 auth_alg = WLAN_AUTH_SAE;
3916 break;
77fdaa12
JB		 3917 default:
3918 return -EOPNOTSUPP;
60f8b39c 3919 }
77fdaa12 3920
6b8ece3a
JM		 3921 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
3922 req->ie_len, GFP_KERNEL);
66e67e41 3923 if (!auth_data)
9c6bd790 3924 return -ENOMEM;
77fdaa12 3925
66e67e41 3926 auth_data->bss = req->bss;
77fdaa12 3927
6b8ece3a
JM		 3928 if (req->sae_data_len >= 4) {
3929 __le16 *pos = (__le16 *) req->sae_data;
3930 auth_data->sae_trans = le16_to_cpu(pos[0]);
3931 auth_data->sae_status = le16_to_cpu(pos[1]);
3932 memcpy(auth_data->data, req->sae_data + 4,
3933 req->sae_data_len - 4);
3934 auth_data->data_len += req->sae_data_len - 4;
3935 }
3936
77fdaa12 3937 if (req->ie && req->ie_len) {
6b8ece3a
JM		 3938 memcpy(&auth_data->data[auth_data->data_len],
3939 req->ie, req->ie_len);
3940 auth_data->data_len += req->ie_len;
9c6bd790 3941 }
77fdaa12 3942
fffd0934 3943 if (req->key && req->key_len) {
66e67e41
JB		 3944 auth_data->key_len = req->key_len;
3945 auth_data->key_idx = req->key_idx;
3946 memcpy(auth_data->key, req->key, req->key_len);
fffd0934
JB		 3947 }
3948
66e67e41 3949 auth_data->algorithm = auth_alg;
60f8b39c 3950
66e67e41 3951 /* try to authenticate/probe */
2a33bee2 3952
66e67e41 3953 mutex_lock(&ifmgd->mtx);
2a33bee2 3954
66e67e41
JB		 3955 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
3956 ifmgd->assoc_data) {
3957 err = -EBUSY;
3958 goto err_free;
2a33bee2
GE		 3959 }
3960
66e67e41
JB		 3961 if (ifmgd->auth_data)
3962 ieee80211_destroy_auth_data(sdata, false);
2a33bee2 3963
66e67e41
JB		 3964 /* prep auth_data so we don't go into idle on disassoc */
3965 ifmgd->auth_data = auth_data;
af6b6374 3966
66e67e41 3967 if (ifmgd->associated)
37ad3888 3968 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
af6b6374 3969
bdcbd8e0 3970 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
e5b900d2 3971
a1cf775d
JB		 3972 err = ieee80211_prep_connection(sdata, req->bss, false);
3973 if (err)
66e67e41 3974 goto err_clear;
af6b6374 3975
66e67e41
JB		 3976 err = ieee80211_probe_auth(sdata);
3977 if (err) {
66e67e41
JB		 3978 sta_info_destroy_addr(sdata, req->bss->bssid);
3979 goto err_clear;
3980 }
3981
3982 /* hold our own reference */
5b112d3d 3983 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
66e67e41
JB		 3984 err = 0;
3985 goto out_unlock;
3986
3987 err_clear:
3d2abdfd
EP		 3988 memset(ifmgd->bssid, 0, ETH_ALEN);
3989 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 3990 ifmgd->auth_data = NULL;
3991 err_free:
3992 kfree(auth_data);
3993 out_unlock:
3994 mutex_unlock(&ifmgd->mtx);
b2abb6e2 3995
66e67e41 3996 return err;
af6b6374
JB		 3997}
3998
77fdaa12
JB		 3999int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4000 struct cfg80211_assoc_request *req)
f0706e82 4001{
66e67e41 4002 struct ieee80211_local *local = sdata->local;
77fdaa12 4003 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 4004 struct ieee80211_bss *bss = (void *)req->bss->priv;
66e67e41 4005 struct ieee80211_mgd_assoc_data *assoc_data;
c65dd147 4006 const struct cfg80211_bss_ies *beacon_ies;
4e74bfdb 4007 struct ieee80211_supported_band *sband;
b08fbbd8 4008 const u8 *ssidie, *ht_ie, *vht_ie;
2a33bee2 4009 int i, err;
f0706e82 4010
66e67e41
JB		 4011 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4012 if (!assoc_data)
4013 return -ENOMEM;
4014
9caf0364
JB		 4015 rcu_read_lock();
4016 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4017 if (!ssidie) {
4018 rcu_read_unlock();
4019 kfree(assoc_data);
4020 return -EINVAL;
4021 }
4022 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4023 assoc_data->ssid_len = ssidie[1];
4024 rcu_read_unlock();
4025
77fdaa12 4026 mutex_lock(&ifmgd->mtx);
9c87ba67 4027
66e67e41 4028 if (ifmgd->associated)
37ad3888 4029 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
66e67e41
JB		 4030
4031 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4032 err = -EBUSY;
4033 goto err_free;
af6b6374 4034 }
77fdaa12 4035
66e67e41
JB		 4036 if (ifmgd->assoc_data) {
4037 err = -EBUSY;
4038 goto err_free;
4039 }
77fdaa12 4040
66e67e41
JB		 4041 if (ifmgd->auth_data) {
4042 bool match;
4043
4044 /* keep sta info, bssid if matching */
b203ca39 4045 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
66e67e41 4046 ieee80211_destroy_auth_data(sdata, match);
2a33bee2
GE		 4047 }
4048
66e67e41 4049 /* prepare assoc data */
19c3b830 4050
d8ec4433
JO		 4051 ifmgd->beacon_crc_valid = false;
4052
de5036aa
JB		 4053 /*
4054 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4055 * We still associate in non-HT mode (11a/b/g) if any one of these
4056 * ciphers is configured as pairwise.
4057 * We can set this to true for non-11n hardware, that'll be checked
4058 * separately along with the peer capabilities.
4059 */
1c4cb928 4060 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
77fdaa12
JB		 4061 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4062 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
1c4cb928 4063 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
a8243b72 4064 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
d545daba 4065 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
1c4cb928 4066 netdev_info(sdata->dev,
d545daba 4067 "disabling HT/VHT due to WEP/TKIP use\n");
1c4cb928
JB		 4068 }
4069 }
77fdaa12 4070
d545daba 4071 if (req->flags & ASSOC_REQ_DISABLE_HT) {
a8243b72 4072 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
d545daba
MP		 4073 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4074 }
ef96a842 4075
4e74bfdb
JB		 4076 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4077 sband = local->hw.wiphy->bands[req->bss->channel->band];
4078 if (!sband->ht_cap.ht_supported ||
1c4cb928 4079 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
a8243b72 4080 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
1b49de26
JB		 4081 if (!bss->wmm_used)
4082 netdev_info(sdata->dev,
4083 "disabling HT as WMM/QoS is not supported by the AP\n");
1c4cb928 4084 }
4e74bfdb 4085
d545daba
MP		 4086 /* disable VHT if we don't support it or the AP doesn't use WMM */
4087 if (!sband->vht_cap.vht_supported ||
4088 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
4089 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
1b49de26
JB		 4090 if (!bss->wmm_used)
4091 netdev_info(sdata->dev,
4092 "disabling VHT as WMM/QoS is not supported by the AP\n");
d545daba
MP		 4093 }
4094
ef96a842
BG		 4095 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4096 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4097 sizeof(ifmgd->ht_capa_mask));
4098
77fdaa12 4099 if (req->ie && req->ie_len) {
66e67e41
JB		 4100 memcpy(assoc_data->ie, req->ie, req->ie_len);
4101 assoc_data->ie_len = req->ie_len;
4102 }
f679f65d 4103
66e67e41 4104 assoc_data->bss = req->bss;
f679f65d 4105
af6b6374
JB		 4106 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4107 if (ifmgd->powersave)
04ecd257 4108 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
af6b6374 4109 else
04ecd257 4110 sdata->smps_mode = IEEE80211_SMPS_OFF;
af6b6374 4111 } else
04ecd257 4112 sdata->smps_mode = ifmgd->req_smps;
af6b6374 4113
66e67e41 4114 assoc_data->capability = req->bss->capability;
32c5057b
JB		 4115 assoc_data->wmm = bss->wmm_used &&
4116 (local->hw.queues >= IEEE80211_NUM_ACS);
66e67e41
JB		 4117 assoc_data->supp_rates = bss->supp_rates;
4118 assoc_data->supp_rates_len = bss->supp_rates_len;
9dde6423 4119
9caf0364 4120 rcu_read_lock();
9dde6423
JB		 4121 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4122 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4123 assoc_data->ap_ht_param =
4124 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4125 else
a8243b72 4126 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
b08fbbd8
JB		 4127 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4128 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4129 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4130 sizeof(struct ieee80211_vht_cap));
4131 else
4132 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
9caf0364 4133 rcu_read_unlock();
63f170e0 4134
ab13315a
KV		 4135 if (bss->wmm_used && bss->uapsd_supported &&
4136 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
76f0303d 4137 assoc_data->uapsd = true;
ab13315a
KV		 4138 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4139 } else {
76f0303d 4140 assoc_data->uapsd = false;
ab13315a
KV		 4141 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4142 }
4143
77fdaa12 4144 if (req->prev_bssid)
66e67e41 4145 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12
JB		 4146
4147 if (req->use_mfp) {
4148 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4149 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4150 } else {
4151 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4152 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4153 }
4154
4155 if (req->crypto.control_port)
4156 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4157 else
4158 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4159
a621fa4d
JB		 4160 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4161 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4162
66e67e41
JB		 4163 /* kick off associate process */
4164
4165 ifmgd->assoc_data = assoc_data;
826262c3 4166 ifmgd->dtim_period = 0;
66e67e41 4167
a1cf775d
JB		 4168 err = ieee80211_prep_connection(sdata, req->bss, true);
4169 if (err)
4170 goto err_clear;
66e67e41 4171
c65dd147
EG		 4172 rcu_read_lock();
4173 beacon_ies = rcu_dereference(req->bss->beacon_ies);
826262c3 4174
c65dd147
EG		 4175 if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC &&
4176 !beacon_ies) {
4177 /*
4178 * Wait up to one beacon interval ...
4179 * should this be more if we miss one?
4180 */
4181 sdata_info(sdata, "waiting for beacon from %pM\n",
4182 ifmgd->bssid);
4183 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
89afe614 4184 assoc_data->timeout_started = true;
c65dd147
EG		 4185 assoc_data->need_beacon = true;
4186 } else if (beacon_ies) {
4187 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4188 beacon_ies->data,
4189 beacon_ies->len);
ef429dad
JB		 4190 u8 dtim_count = 0;
4191
c65dd147
EG		 4192 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4193 const struct ieee80211_tim_ie *tim;
4194 tim = (void *)(tim_ie + 2);
4195 ifmgd->dtim_period = tim->dtim_period;
ef429dad 4196 dtim_count = tim->dtim_count;
826262c3 4197 }
66e67e41 4198 assoc_data->have_beacon = true;
66e67e41 4199 assoc_data->timeout = jiffies;
89afe614 4200 assoc_data->timeout_started = true;
ef429dad
JB		 4201
4202 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
4203 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4204 sdata->vif.bss_conf.sync_device_ts =
4205 bss->device_ts_beacon;
4206 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4207 }
c65dd147
EG		 4208 } else {
4209 assoc_data->timeout = jiffies;
89afe614 4210 assoc_data->timeout_started = true;
66e67e41 4211 }
c65dd147
EG		 4212 rcu_read_unlock();
4213
66e67e41
JB		 4214 run_again(ifmgd, assoc_data->timeout);
4215
fcff4f10
PS		 4216 if (bss->corrupt_data) {
4217 char *corrupt_type = "data";
4218 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4219 if (bss->corrupt_data &
4220 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4221 corrupt_type = "beacon and probe response";
4222 else
4223 corrupt_type = "beacon";
4224 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4225 corrupt_type = "probe response";
bdcbd8e0
JB		 4226 sdata_info(sdata, "associating with AP with corrupt %s\n",
4227 corrupt_type);
fcff4f10
PS		 4228 }
4229
66e67e41
JB		 4230 err = 0;
4231 goto out;
4232 err_clear:
3d2abdfd
EP		 4233 memset(ifmgd->bssid, 0, ETH_ALEN);
4234 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 4235 ifmgd->assoc_data = NULL;
4236 err_free:
4237 kfree(assoc_data);
4238 out:
4239 mutex_unlock(&ifmgd->mtx);
4240
4241 return err;
f0706e82
JB		 4242}
4243
77fdaa12 4244int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
63c9c5e7 4245 struct cfg80211_deauth_request *req)
f0706e82 4246{
46900298 4247 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 4248 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
6863255b 4249 bool tx = !req->local_state_change;
86552017 4250 bool sent_frame = false;
f0706e82 4251
77fdaa12
JB		 4252 mutex_lock(&ifmgd->mtx);
4253
bdcbd8e0
JB		 4254 sdata_info(sdata,
4255 "deauthenticating from %pM by local choice (reason=%d)\n",
4256 req->bssid, req->reason_code);
0ff71613 4257
86552017 4258 if (ifmgd->auth_data) {
8c7d857c 4259 drv_mgd_prepare_tx(sdata->local, sdata);
37ad3888
JB		 4260 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4261 IEEE80211_STYPE_DEAUTH,
6863255b 4262 req->reason_code, tx,
37ad3888 4263 frame_buf);
86552017
JB		 4264 ieee80211_destroy_auth_data(sdata, false);
4265 mutex_unlock(&ifmgd->mtx);
4266
4267 sent_frame = tx;
4268 goto out;
8c7d857c
EG		 4269 }
4270
86552017
JB		 4271 if (ifmgd->associated &&
4272 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
4273 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4274 req->reason_code, tx, frame_buf);
4275 sent_frame = tx;
4276 }
37ad3888
JB		 4277 mutex_unlock(&ifmgd->mtx);
4278
86552017 4279 out:
86552017
JB		 4280 if (sent_frame)
4281 __cfg80211_send_deauth(sdata->dev, frame_buf,
4282 IEEE80211_DEAUTH_FRAME_LEN);
4283
f0706e82
JB		 4284 return 0;
4285}
84363e6e 4286
77fdaa12 4287int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 4288 struct cfg80211_disassoc_request *req)
9c6bd790 4289{
77fdaa12 4290 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 4291 u8 bssid[ETH_ALEN];
6ae16775 4292 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
9c6bd790 4293
77fdaa12 4294 mutex_lock(&ifmgd->mtx);
10f644a4 4295
8d8b261a
JB		 4296 /*
4297 * cfg80211 should catch this ... but it's racy since
4298 * we can receive a disassoc frame, process it, hand it
4299 * to cfg80211 while that's in a locked section already
4300 * trying to tell us that the user wants to disconnect.
4301 */
0c1ad2ca 4302 if (ifmgd->associated != req->bss) {
77fdaa12
JB		 4303 mutex_unlock(&ifmgd->mtx);
4304 return -ENOLINK;
4305 }
4306
bdcbd8e0
JB		 4307 sdata_info(sdata,
4308 "disassociating from %pM by local choice (reason=%d)\n",
4309 req->bss->bssid, req->reason_code);
0ff71613 4310
e69e95db 4311 memcpy(bssid, req->bss->bssid, ETH_ALEN);
37ad3888
JB		 4312 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4313 req->reason_code, !req->local_state_change,
4314 frame_buf);
77fdaa12 4315 mutex_unlock(&ifmgd->mtx);
10f644a4 4316
6ae16775
AQ		 4317 __cfg80211_send_disassoc(sdata->dev, frame_buf,
4318 IEEE80211_DEAUTH_FRAME_LEN);
bc83b681 4319
10f644a4
JB		 4320 return 0;
4321}
026331c4 4322
afa762f6 4323void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
54e4ffb2
JB		 4324{
4325 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4326
49921859
BG		 4327 /*
4328 * Make sure some work items will not run after this,
4329 * they will not do anything but might not have been
4330 * cancelled when disconnecting.
4331 */
4332 cancel_work_sync(&ifmgd->monitor_work);
4333 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
4334 cancel_work_sync(&ifmgd->request_smps_work);
4335 cancel_work_sync(&ifmgd->csa_connection_drop_work);
4336 cancel_work_sync(&ifmgd->chswitch_work);
4337
54e4ffb2
JB		 4338 mutex_lock(&ifmgd->mtx);
4339 if (ifmgd->assoc_data)
4340 ieee80211_destroy_assoc_data(sdata, false);
4341 if (ifmgd->auth_data)
4342 ieee80211_destroy_auth_data(sdata, false);
4343 del_timer_sync(&ifmgd->timer);
4344 mutex_unlock(&ifmgd->mtx);
4345}
4346
a97c13c3
JO		 4347void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
4348 enum nl80211_cqm_rssi_threshold_event rssi_event,
4349 gfp_t gfp)
4350{
4351 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4352
b5878a2d
JB		 4353 trace_api_cqm_rssi_notify(sdata, rssi_event);
4354
a97c13c3
JO		 4355 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
4356}
4357EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
kernel source for telekom puls (alcatel/mediatek)