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mac80211: pass queue bitmap to flush operation
[deliverable/linux.git] / net / mac80211 / mlme.c
CommitLineData
f0706e82
JB		 1/*
2 * BSS client mode implementation
5394af4d 3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
f0706e82
JB		 4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
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
77fdaa12
JB		 90/*
91 * All cfg80211 functions have to be called outside a locked
92 * section so that they can acquire a lock themselves... This
93 * is much simpler than queuing up things in cfg80211, but we
94 * do need some indirection for that here.
95 */
96enum rx_mgmt_action {
97 /* no action required */
98 RX_MGMT_NONE,
99
77fdaa12
JB		 100 /* caller must call cfg80211_send_deauth() */
101 RX_MGMT_CFG80211_DEAUTH,
102
103 /* caller must call cfg80211_send_disassoc() */
104 RX_MGMT_CFG80211_DISASSOC,
66e67e41
JB		 105
106 /* caller must call cfg80211_send_rx_auth() */
107 RX_MGMT_CFG80211_RX_AUTH,
108
109 /* caller must call cfg80211_send_rx_assoc() */
110 RX_MGMT_CFG80211_RX_ASSOC,
111
112 /* caller must call cfg80211_send_assoc_timeout() */
113 RX_MGMT_CFG80211_ASSOC_TIMEOUT,
30eb1dc2
JB		 114
115 /* used when a processed beacon causes a deauth */
116 RX_MGMT_CFG80211_TX_DEAUTH,
77fdaa12
JB		 117};
118
5484e237 119/* utils */
77fdaa12
JB		 120static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd)
121{
46a5ebaf 122 lockdep_assert_held(&ifmgd->mtx);
77fdaa12
JB		 123}
124
ca386f31
JB		 125/*
126 * We can have multiple work items (and connection probing)
127 * scheduling this timer, but we need to take care to only
128 * reschedule it when it should fire _earlier_ than it was
129 * asked for before, or if it's not pending right now. This
130 * function ensures that. Note that it then is required to
131 * run this function for all timeouts after the first one
132 * has happened -- the work that runs from this timer will
133 * do that.
134 */
66e67e41 135static void run_again(struct ieee80211_if_managed *ifmgd, unsigned long timeout)
ca386f31
JB		 136{
137 ASSERT_MGD_MTX(ifmgd);
138
139 if (!timer_pending(&ifmgd->timer) ||
140 time_before(timeout, ifmgd->timer.expires))
141 mod_timer(&ifmgd->timer, timeout);
142}
143
d3a910a8 144void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
b291ba11 145{
c1288b12 146 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
b291ba11
JB		 147 return;
148
7eeff74c
JB		 149 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
150 return;
151
b291ba11 152 mod_timer(&sdata->u.mgd.bcn_mon_timer,
7ccc8bd7 153 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
b291ba11
JB		 154}
155
be099e82
LR		 156void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
157{
0c699c3a
LR		 158 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
159
8628172f
SG		 160 if (unlikely(!sdata->u.mgd.associated))
161 return;
162
be099e82
LR		 163 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
164 return;
165
166 mod_timer(&sdata->u.mgd.conn_mon_timer,
167 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
0c699c3a
LR		 168
169 ifmgd->probe_send_count = 0;
be099e82
LR		 170}
171
5484e237 172static int ecw2cw(int ecw)
60f8b39c 173{
5484e237 174 return (1 << ecw) - 1;
60f8b39c
JB		 175}
176
6565ec9b
JB		 177static u32 chandef_downgrade(struct cfg80211_chan_def *c)
178{
179 u32 ret;
180 int tmp;
181
182 switch (c->width) {
183 case NL80211_CHAN_WIDTH_20:
184 c->width = NL80211_CHAN_WIDTH_20_NOHT;
185 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
186 break;
187 case NL80211_CHAN_WIDTH_40:
188 c->width = NL80211_CHAN_WIDTH_20;
189 c->center_freq1 = c->chan->center_freq;
190 ret = IEEE80211_STA_DISABLE_40MHZ |
191 IEEE80211_STA_DISABLE_VHT;
192 break;
193 case NL80211_CHAN_WIDTH_80:
194 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
195 /* n_P40 */
196 tmp /= 2;
197 /* freq_P40 */
198 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
199 c->width = NL80211_CHAN_WIDTH_40;
200 ret = IEEE80211_STA_DISABLE_VHT;
201 break;
202 case NL80211_CHAN_WIDTH_80P80:
203 c->center_freq2 = 0;
204 c->width = NL80211_CHAN_WIDTH_80;
205 ret = IEEE80211_STA_DISABLE_80P80MHZ |
206 IEEE80211_STA_DISABLE_160MHZ;
207 break;
208 case NL80211_CHAN_WIDTH_160:
209 /* n_P20 */
210 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
211 /* n_P80 */
212 tmp /= 4;
213 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
214 c->width = NL80211_CHAN_WIDTH_80;
215 ret = IEEE80211_STA_DISABLE_80P80MHZ |
216 IEEE80211_STA_DISABLE_160MHZ;
217 break;
218 default:
219 case NL80211_CHAN_WIDTH_20_NOHT:
220 WARN_ON_ONCE(1);
221 c->width = NL80211_CHAN_WIDTH_20_NOHT;
222 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
223 break;
224 }
225
226 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
227
228 return ret;
229}
230
231static u32
232ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
233 struct ieee80211_supported_band *sband,
234 struct ieee80211_channel *channel,
235 const struct ieee80211_ht_operation *ht_oper,
236 const struct ieee80211_vht_operation *vht_oper,
30eb1dc2 237 struct cfg80211_chan_def *chandef, bool verbose)
6565ec9b
JB		 238{
239 struct cfg80211_chan_def vht_chandef;
240 u32 ht_cfreq, ret;
241
242 chandef->chan = channel;
243 chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
244 chandef->center_freq1 = channel->center_freq;
245 chandef->center_freq2 = 0;
246
247 if (!ht_oper || !sband->ht_cap.ht_supported) {
248 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
249 goto out;
250 }
251
252 chandef->width = NL80211_CHAN_WIDTH_20;
253
254 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
255 channel->band);
256 /* check that channel matches the right operating channel */
257 if (channel->center_freq != ht_cfreq) {
258 /*
259 * It's possible that some APs are confused here;
260 * Netgear WNDR3700 sometimes reports 4 higher than
261 * the actual channel in association responses, but
262 * since we look at probe response/beacon data here
263 * it should be OK.
264 */
30eb1dc2
JB		 265 if (verbose)
266 sdata_info(sdata,
267 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
268 channel->center_freq, ht_cfreq,
269 ht_oper->primary_chan, channel->band);
6565ec9b
JB		 270 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
271 goto out;
272 }
273
274 /* check 40 MHz support, if we have it */
275 if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
276 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
277 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
278 chandef->width = NL80211_CHAN_WIDTH_40;
279 chandef->center_freq1 += 10;
280 break;
281 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
282 chandef->width = NL80211_CHAN_WIDTH_40;
283 chandef->center_freq1 -= 10;
284 break;
285 }
286 } else {
287 /* 40 MHz (and 80 MHz) must be supported for VHT */
288 ret = IEEE80211_STA_DISABLE_VHT;
289 goto out;
290 }
291
292 if (!vht_oper || !sband->vht_cap.vht_supported) {
293 ret = IEEE80211_STA_DISABLE_VHT;
294 goto out;
295 }
296
297 vht_chandef.chan = channel;
298 vht_chandef.center_freq1 =
299 ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx,
300 channel->band);
301 vht_chandef.center_freq2 = 0;
302
303 if (vht_oper->center_freq_seg2_idx)
304 vht_chandef.center_freq2 =
305 ieee80211_channel_to_frequency(
306 vht_oper->center_freq_seg2_idx,
307 channel->band);
308
309 switch (vht_oper->chan_width) {
310 case IEEE80211_VHT_CHANWIDTH_USE_HT:
311 vht_chandef.width = chandef->width;
312 break;
313 case IEEE80211_VHT_CHANWIDTH_80MHZ:
314 vht_chandef.width = NL80211_CHAN_WIDTH_80;
315 break;
316 case IEEE80211_VHT_CHANWIDTH_160MHZ:
317 vht_chandef.width = NL80211_CHAN_WIDTH_160;
318 break;
319 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
320 vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
321 break;
322 default:
30eb1dc2
JB		 323 if (verbose)
324 sdata_info(sdata,
325 "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
326 vht_oper->chan_width);
6565ec9b
JB		 327 ret = IEEE80211_STA_DISABLE_VHT;
328 goto out;
329 }
330
331 if (!cfg80211_chandef_valid(&vht_chandef)) {
30eb1dc2
JB		 332 if (verbose)
333 sdata_info(sdata,
334 "AP VHT information is invalid, disable VHT\n");
6565ec9b
JB		 335 ret = IEEE80211_STA_DISABLE_VHT;
336 goto out;
337 }
338
339 if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
340 ret = 0;
341 goto out;
342 }
343
344 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
30eb1dc2
JB		 345 if (verbose)
346 sdata_info(sdata,
347 "AP VHT information doesn't match HT, disable VHT\n");
6565ec9b
JB		 348 ret = IEEE80211_STA_DISABLE_VHT;
349 goto out;
350 }
351
352 *chandef = vht_chandef;
353
354 ret = 0;
355
356out:
586e01ed
JB		 357 /* don't print the message below for VHT mismatch if VHT is disabled */
358 if (ret & IEEE80211_STA_DISABLE_VHT)
359 vht_chandef = *chandef;
360
6565ec9b
JB		 361 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
362 IEEE80211_CHAN_DISABLED)) {
363 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
364 ret = IEEE80211_STA_DISABLE_HT |
365 IEEE80211_STA_DISABLE_VHT;
366 goto out;
367 }
368
369 ret |= chandef_downgrade(chandef);
370 }
371
30eb1dc2 372 if (chandef->width != vht_chandef.width && verbose)
6565ec9b
JB		 373 sdata_info(sdata,
374 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
375
376 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
377 return ret;
378}
379
30eb1dc2
JB		 380static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
381 struct sta_info *sta,
382 const struct ieee80211_ht_operation *ht_oper,
383 const struct ieee80211_vht_operation *vht_oper,
384 const u8 *bssid, u32 *changed)
d5522e03
JB		 385{
386 struct ieee80211_local *local = sdata->local;
30eb1dc2 387 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d5522e03 388 struct ieee80211_supported_band *sband;
55de908a 389 struct ieee80211_channel *chan;
30eb1dc2 390 struct cfg80211_chan_def chandef;
9ed6bcce 391 u16 ht_opmode;
30eb1dc2
JB		 392 u32 flags;
393 enum ieee80211_sta_rx_bandwidth new_sta_bw;
394 int ret;
d5522e03 395
30eb1dc2
JB		 396 /* if HT was/is disabled, don't track any bandwidth changes */
397 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
1128958d
JB		 398 return 0;
399
30eb1dc2
JB		 400 /* don't check VHT if we associated as non-VHT station */
401 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
402 vht_oper = NULL;
403
404 if (WARN_ON_ONCE(!sta))
405 return -EINVAL;
406
f2d9330e 407 chan = sdata->vif.bss_conf.chandef.chan;
55de908a 408 sband = local->hw.wiphy->bands[chan->band];
d5522e03 409
30eb1dc2
JB		 410 /* calculate new channel (type) based on HT/VHT operation IEs */
411 flags = ieee80211_determine_chantype(sdata, sband, chan, ht_oper,
412 vht_oper, &chandef, false);
413
414 /*
415 * Downgrade the new channel if we associated with restricted
416 * capabilities. For example, if we associated as a 20 MHz STA
417 * to a 40 MHz AP (due to regulatory, capabilities or config
418 * reasons) then switching to a 40 MHz channel now won't do us
419 * any good -- we couldn't use it with the AP.
420 */
421 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
422 chandef.width == NL80211_CHAN_WIDTH_80P80)
423 flags |= chandef_downgrade(&chandef);
424 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
425 chandef.width == NL80211_CHAN_WIDTH_160)
426 flags |= chandef_downgrade(&chandef);
427 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
428 chandef.width > NL80211_CHAN_WIDTH_20)
429 flags |= chandef_downgrade(&chandef);
430
431 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
432 return 0;
433
434 sdata_info(sdata,
435 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
436 ifmgd->bssid, chandef.chan->center_freq, chandef.width,
437 chandef.center_freq1, chandef.center_freq2);
438
439 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
440 IEEE80211_STA_DISABLE_VHT |
441 IEEE80211_STA_DISABLE_40MHZ |
442 IEEE80211_STA_DISABLE_80P80MHZ |
443 IEEE80211_STA_DISABLE_160MHZ)) ||
444 !cfg80211_chandef_valid(&chandef)) {
445 sdata_info(sdata,
446 "AP %pM changed bandwidth in a way we can't support - disconnect\n",
447 ifmgd->bssid);
448 return -EINVAL;
449 }
450
451 switch (chandef.width) {
452 case NL80211_CHAN_WIDTH_20_NOHT:
453 case NL80211_CHAN_WIDTH_20:
454 new_sta_bw = IEEE80211_STA_RX_BW_20;
455 break;
4bf88530 456 case NL80211_CHAN_WIDTH_40:
30eb1dc2 457 new_sta_bw = IEEE80211_STA_RX_BW_40;
64f68e5d 458 break;
30eb1dc2
JB		 459 case NL80211_CHAN_WIDTH_80:
460 new_sta_bw = IEEE80211_STA_RX_BW_80;
461 break;
462 case NL80211_CHAN_WIDTH_80P80:
463 case NL80211_CHAN_WIDTH_160:
464 new_sta_bw = IEEE80211_STA_RX_BW_160;
64f68e5d 465 break;
30eb1dc2
JB		 466 default:
467 return -EINVAL;
64f68e5d 468 }
d5522e03 469
30eb1dc2
JB		 470 if (new_sta_bw > sta->cur_max_bandwidth)
471 new_sta_bw = sta->cur_max_bandwidth;
64f68e5d 472
30eb1dc2
JB		 473 if (new_sta_bw < sta->sta.bandwidth) {
474 sta->sta.bandwidth = new_sta_bw;
475 rate_control_rate_update(local, sband, sta,
476 IEEE80211_RC_BW_CHANGED);
477 }
64f68e5d 478
30eb1dc2
JB		 479 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
480 if (ret) {
481 sdata_info(sdata,
482 "AP %pM changed bandwidth to incompatible one - disconnect\n",
483 ifmgd->bssid);
484 return ret;
485 }
7cc44ed4 486
30eb1dc2
JB		 487 if (new_sta_bw > sta->sta.bandwidth) {
488 sta->sta.bandwidth = new_sta_bw;
489 rate_control_rate_update(local, sband, sta,
490 IEEE80211_RC_BW_CHANGED);
0aaffa9b 491 }
d5522e03 492
074d46d1 493 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
d5522e03
JB		 494
495 /* if bss configuration changed store the new one */
30eb1dc2
JB		 496 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
497 *changed |= BSS_CHANGED_HT;
9ed6bcce 498 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
d5522e03
JB		 499 }
500
30eb1dc2 501 return 0;
d5522e03
JB		 502}
503
9c6bd790
JB		 504/* frame sending functions */
505
66e67e41
JB		 506static int ieee80211_compatible_rates(const u8 *supp_rates, int supp_rates_len,
507 struct ieee80211_supported_band *sband,
508 u32 *rates)
509{
510 int i, j, count;
511 *rates = 0;
512 count = 0;
513 for (i = 0; i < supp_rates_len; i++) {
514 int rate = (supp_rates[i] & 0x7F) * 5;
515
516 for (j = 0; j < sband->n_bitrates; j++)
517 if (sband->bitrates[j].bitrate == rate) {
518 *rates |= BIT(j);
519 count++;
520 break;
521 }
522 }
523
524 return count;
525}
526
527static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
9dde6423 528 struct sk_buff *skb, u8 ap_ht_param,
66e67e41
JB		 529 struct ieee80211_supported_band *sband,
530 struct ieee80211_channel *channel,
531 enum ieee80211_smps_mode smps)
532{
66e67e41
JB		 533 u8 *pos;
534 u32 flags = channel->flags;
535 u16 cap;
536 struct ieee80211_sta_ht_cap ht_cap;
537
538 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
539
66e67e41
JB		 540 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
541 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
542
66e67e41
JB		 543 /* determine capability flags */
544 cap = ht_cap.cap;
545
9dde6423 546 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
66e67e41
JB		 547 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
548 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
549 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
550 cap &= ~IEEE80211_HT_CAP_SGI_40;
551 }
552 break;
553 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
554 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
555 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
556 cap &= ~IEEE80211_HT_CAP_SGI_40;
557 }
558 break;
559 }
560
24398e39
JB		 561 /*
562 * If 40 MHz was disabled associate as though we weren't
563 * capable of 40 MHz -- some broken APs will never fall
564 * back to trying to transmit in 20 MHz.
565 */
566 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
567 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
568 cap &= ~IEEE80211_HT_CAP_SGI_40;
569 }
570
66e67e41
JB		 571 /* set SM PS mode properly */
572 cap &= ~IEEE80211_HT_CAP_SM_PS;
573 switch (smps) {
574 case IEEE80211_SMPS_AUTOMATIC:
575 case IEEE80211_SMPS_NUM_MODES:
576 WARN_ON(1);
577 case IEEE80211_SMPS_OFF:
578 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
579 IEEE80211_HT_CAP_SM_PS_SHIFT;
580 break;
581 case IEEE80211_SMPS_STATIC:
582 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
583 IEEE80211_HT_CAP_SM_PS_SHIFT;
584 break;
585 case IEEE80211_SMPS_DYNAMIC:
586 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
587 IEEE80211_HT_CAP_SM_PS_SHIFT;
588 break;
589 }
590
591 /* reserve and fill IE */
592 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
593 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
594}
595
d545daba
MP		 596static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
597 struct sk_buff *skb,
b08fbbd8
JB		 598 struct ieee80211_supported_band *sband,
599 struct ieee80211_vht_cap *ap_vht_cap)
d545daba
MP		 600{
601 u8 *pos;
602 u32 cap;
603 struct ieee80211_sta_vht_cap vht_cap;
b08fbbd8 604 int i;
d545daba
MP		 605
606 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
607
608 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
dd5ecfea 609 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
d545daba
MP		 610
611 /* determine capability flags */
612 cap = vht_cap.cap;
613
f2d9d270
JB		 614 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
615 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ;
616 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
617 }
618
619 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
620 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
621 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
622 }
623
b08fbbd8
JB		 624 /*
625 * Some APs apparently get confused if our capabilities are better
626 * than theirs, so restrict what we advertise in the assoc request.
627 */
628 if (!(ap_vht_cap->vht_cap_info &
629 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
630 cap &= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE;
631
632 if (!(ap_vht_cap->vht_cap_info &
633 cpu_to_le32(IEEE80211_VHT_CAP_TXSTBC)))
634 cap &= ~(IEEE80211_VHT_CAP_RXSTBC_1 |
635 IEEE80211_VHT_CAP_RXSTBC_3 |
636 IEEE80211_VHT_CAP_RXSTBC_4);
637
638 for (i = 0; i < 8; i++) {
639 int shift = i * 2;
640 u16 mask = IEEE80211_VHT_MCS_NOT_SUPPORTED << shift;
641 u16 ap_mcs, our_mcs;
642
643 ap_mcs = (le16_to_cpu(ap_vht_cap->supp_mcs.tx_mcs_map) &
644 mask) >> shift;
645 our_mcs = (le16_to_cpu(vht_cap.vht_mcs.rx_mcs_map) &
646 mask) >> shift;
647
24af717c
JB		 648 if (our_mcs == IEEE80211_VHT_MCS_NOT_SUPPORTED)
649 continue;
650
b08fbbd8
JB		 651 switch (ap_mcs) {
652 default:
653 if (our_mcs <= ap_mcs)
654 break;
655 /* fall through */
656 case IEEE80211_VHT_MCS_NOT_SUPPORTED:
657 vht_cap.vht_mcs.rx_mcs_map &= cpu_to_le16(~mask);
658 vht_cap.vht_mcs.rx_mcs_map |=
659 cpu_to_le16(ap_mcs << shift);
660 }
661 }
662
d545daba 663 /* reserve and fill IE */
d4950281 664 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
d545daba
MP		 665 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
666}
667
66e67e41
JB		 668static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
669{
670 struct ieee80211_local *local = sdata->local;
671 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
672 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
673 struct sk_buff *skb;
674 struct ieee80211_mgmt *mgmt;
675 u8 *pos, qos_info;
676 size_t offset = 0, noffset;
677 int i, count, rates_len, supp_rates_len;
678 u16 capab;
679 struct ieee80211_supported_band *sband;
55de908a
JB		 680 struct ieee80211_chanctx_conf *chanctx_conf;
681 struct ieee80211_channel *chan;
66e67e41 682 u32 rates = 0;
66e67e41
JB		 683
684 lockdep_assert_held(&ifmgd->mtx);
685
55de908a
JB		 686 rcu_read_lock();
687 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
688 if (WARN_ON(!chanctx_conf)) {
689 rcu_read_unlock();
690 return;
691 }
4bf88530 692 chan = chanctx_conf->def.chan;
55de908a
JB		 693 rcu_read_unlock();
694 sband = local->hw.wiphy->bands[chan->band];
66e67e41
JB		 695
696 if (assoc_data->supp_rates_len) {
697 /*
698 * Get all rates supported by the device and the AP as
699 * some APs don't like getting a superset of their rates
700 * in the association request (e.g. D-Link DAP 1353 in
701 * b-only mode)...
702 */
703 rates_len = ieee80211_compatible_rates(assoc_data->supp_rates,
704 assoc_data->supp_rates_len,
705 sband, &rates);
706 } else {
707 /*
708 * In case AP not provide any supported rates information
709 * before association, we send information element(s) with
710 * all rates that we support.
711 */
712 rates = ~0;
713 rates_len = sband->n_bitrates;
714 }
715
716 skb = alloc_skb(local->hw.extra_tx_headroom +
717 sizeof(*mgmt) + /* bit too much but doesn't matter */
718 2 + assoc_data->ssid_len + /* SSID */
719 4 + rates_len + /* (extended) rates */
720 4 + /* power capability */
721 2 + 2 * sband->n_channels + /* supported channels */
722 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
d4950281 723 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
66e67e41
JB		 724 assoc_data->ie_len + /* extra IEs */
725 9, /* WMM */
726 GFP_KERNEL);
727 if (!skb)
728 return;
729
730 skb_reserve(skb, local->hw.extra_tx_headroom);
731
732 capab = WLAN_CAPABILITY_ESS;
733
734 if (sband->band == IEEE80211_BAND_2GHZ) {
735 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
736 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
737 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
738 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
739 }
740
741 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
742 capab |= WLAN_CAPABILITY_PRIVACY;
743
744 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
745 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
746 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
747
748 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
749 memset(mgmt, 0, 24);
750 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
751 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
752 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
753
754 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
755 skb_put(skb, 10);
756 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
757 IEEE80211_STYPE_REASSOC_REQ);
758 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
759 mgmt->u.reassoc_req.listen_interval =
760 cpu_to_le16(local->hw.conf.listen_interval);
761 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
762 ETH_ALEN);
763 } else {
764 skb_put(skb, 4);
765 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
766 IEEE80211_STYPE_ASSOC_REQ);
767 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
768 mgmt->u.assoc_req.listen_interval =
769 cpu_to_le16(local->hw.conf.listen_interval);
770 }
771
772 /* SSID */
773 pos = skb_put(skb, 2 + assoc_data->ssid_len);
774 *pos++ = WLAN_EID_SSID;
775 *pos++ = assoc_data->ssid_len;
776 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
777
778 /* add all rates which were marked to be used above */
779 supp_rates_len = rates_len;
780 if (supp_rates_len > 8)
781 supp_rates_len = 8;
782
783 pos = skb_put(skb, supp_rates_len + 2);
784 *pos++ = WLAN_EID_SUPP_RATES;
785 *pos++ = supp_rates_len;
786
787 count = 0;
788 for (i = 0; i < sband->n_bitrates; i++) {
789 if (BIT(i) & rates) {
790 int rate = sband->bitrates[i].bitrate;
791 *pos++ = (u8) (rate / 5);
792 if (++count == 8)
793 break;
794 }
795 }
796
797 if (rates_len > count) {
798 pos = skb_put(skb, rates_len - count + 2);
799 *pos++ = WLAN_EID_EXT_SUPP_RATES;
800 *pos++ = rates_len - count;
801
802 for (i++; i < sband->n_bitrates; i++) {
803 if (BIT(i) & rates) {
804 int rate = sband->bitrates[i].bitrate;
805 *pos++ = (u8) (rate / 5);
806 }
807 }
808 }
809
810 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
811 /* 1. power capabilities */
812 pos = skb_put(skb, 4);
813 *pos++ = WLAN_EID_PWR_CAPABILITY;
814 *pos++ = 2;
815 *pos++ = 0; /* min tx power */
55de908a 816 *pos++ = chan->max_power; /* max tx power */
66e67e41
JB		 817
818 /* 2. supported channels */
819 /* TODO: get this in reg domain format */
820 pos = skb_put(skb, 2 * sband->n_channels + 2);
821 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
822 *pos++ = 2 * sband->n_channels;
823 for (i = 0; i < sband->n_channels; i++) {
824 *pos++ = ieee80211_frequency_to_channel(
825 sband->channels[i].center_freq);
826 *pos++ = 1; /* one channel in the subband*/
827 }
828 }
829
830 /* if present, add any custom IEs that go before HT */
831 if (assoc_data->ie_len && assoc_data->ie) {
832 static const u8 before_ht[] = {
833 WLAN_EID_SSID,
834 WLAN_EID_SUPP_RATES,
835 WLAN_EID_EXT_SUPP_RATES,
836 WLAN_EID_PWR_CAPABILITY,
837 WLAN_EID_SUPPORTED_CHANNELS,
838 WLAN_EID_RSN,
839 WLAN_EID_QOS_CAPA,
840 WLAN_EID_RRM_ENABLED_CAPABILITIES,
841 WLAN_EID_MOBILITY_DOMAIN,
842 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
843 };
844 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
845 before_ht, ARRAY_SIZE(before_ht),
846 offset);
847 pos = skb_put(skb, noffset - offset);
848 memcpy(pos, assoc_data->ie + offset, noffset - offset);
849 offset = noffset;
850 }
851
f2d9d270
JB		 852 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
853 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
854 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
855
a8243b72 856 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
9dde6423 857 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
04ecd257 858 sband, chan, sdata->smps_mode);
66e67e41 859
d545daba 860 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
b08fbbd8
JB		 861 ieee80211_add_vht_ie(sdata, skb, sband,
862 &assoc_data->ap_vht_cap);
d545daba 863
66e67e41
JB		 864 /* if present, add any custom non-vendor IEs that go after HT */
865 if (assoc_data->ie_len && assoc_data->ie) {
866 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
867 assoc_data->ie_len,
868 offset);
869 pos = skb_put(skb, noffset - offset);
870 memcpy(pos, assoc_data->ie + offset, noffset - offset);
871 offset = noffset;
872 }
873
76f0303d
JB		 874 if (assoc_data->wmm) {
875 if (assoc_data->uapsd) {
dc41e4d4
EP		 876 qos_info = ifmgd->uapsd_queues;
877 qos_info |= (ifmgd->uapsd_max_sp_len <<
66e67e41
JB		 878 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
879 } else {
880 qos_info = 0;
881 }
882
883 pos = skb_put(skb, 9);
884 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
885 *pos++ = 7; /* len */
886 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
887 *pos++ = 0x50;
888 *pos++ = 0xf2;
889 *pos++ = 2; /* WME */
890 *pos++ = 0; /* WME info */
891 *pos++ = 1; /* WME ver */
892 *pos++ = qos_info;
893 }
894
895 /* add any remaining custom (i.e. vendor specific here) IEs */
896 if (assoc_data->ie_len && assoc_data->ie) {
897 noffset = assoc_data->ie_len;
898 pos = skb_put(skb, noffset - offset);
899 memcpy(pos, assoc_data->ie + offset, noffset - offset);
900 }
901
a1845fc7
JB		 902 drv_mgd_prepare_tx(local, sdata);
903
66e67e41 904 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1672c0e3
JB		 905 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
906 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
907 IEEE80211_TX_INTFL_MLME_CONN_TX;
66e67e41
JB		 908 ieee80211_tx_skb(sdata, skb);
909}
910
572e0012
KV		 911void ieee80211_send_pspoll(struct ieee80211_local *local,
912 struct ieee80211_sub_if_data *sdata)
913{
572e0012
KV		 914 struct ieee80211_pspoll *pspoll;
915 struct sk_buff *skb;
572e0012 916
d8cd189e
KV		 917 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
918 if (!skb)
572e0012 919 return;
572e0012 920
d8cd189e
KV		 921 pspoll = (struct ieee80211_pspoll *) skb->data;
922 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
572e0012 923
62ae67be
JB		 924 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
925 ieee80211_tx_skb(sdata, skb);
572e0012
KV		 926}
927
965bedad
JB		 928void ieee80211_send_nullfunc(struct ieee80211_local *local,
929 struct ieee80211_sub_if_data *sdata,
930 int powersave)
931{
932 struct sk_buff *skb;
d8cd189e 933 struct ieee80211_hdr_3addr *nullfunc;
b6f35301 934 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
965bedad 935
d8cd189e
KV		 936 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
937 if (!skb)
965bedad 938 return;
965bedad 939
d8cd189e 940 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
965bedad 941 if (powersave)
d8cd189e 942 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
965bedad 943
6c17b77b
SF		 944 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
945 IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
b6f35301
RM		 946 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
947 IEEE80211_STA_CONNECTION_POLL))
948 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
949
62ae67be 950 ieee80211_tx_skb(sdata, skb);
965bedad
JB		 951}
952
d524215f
FF		 953static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
954 struct ieee80211_sub_if_data *sdata)
955{
956 struct sk_buff *skb;
957 struct ieee80211_hdr *nullfunc;
958 __le16 fc;
959
960 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
961 return;
962
963 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
d15b8459 964 if (!skb)
d524215f 965 return;
d15b8459 966
d524215f
FF		 967 skb_reserve(skb, local->hw.extra_tx_headroom);
968
969 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
970 memset(nullfunc, 0, 30);
971 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
972 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
973 nullfunc->frame_control = fc;
974 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
975 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
976 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
977 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
978
979 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
980 ieee80211_tx_skb(sdata, skb);
981}
982
cc32abd4
JB		 983/* spectrum management related things */
984static void ieee80211_chswitch_work(struct work_struct *work)
985{
986 struct ieee80211_sub_if_data *sdata =
987 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
cc32abd4
JB		 988 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
989
9607e6b6 990 if (!ieee80211_sdata_running(sdata))
cc32abd4
JB		 991 return;
992
77fdaa12
JB		 993 mutex_lock(&ifmgd->mtx);
994 if (!ifmgd->associated)
995 goto out;
cc32abd4 996
55de908a 997 sdata->local->_oper_channel = sdata->local->csa_channel;
5ce6e438
JB		 998 if (!sdata->local->ops->channel_switch) {
999 /* call "hw_config" only if doing sw channel switch */
1000 ieee80211_hw_config(sdata->local,
1001 IEEE80211_CONF_CHANGE_CHANNEL);
1ea57b1f
SL		 1002 } else {
1003 /* update the device channel directly */
55de908a 1004 sdata->local->hw.conf.channel = sdata->local->_oper_channel;
5ce6e438 1005 }
77fdaa12 1006
cc32abd4 1007 /* XXX: shouldn't really modify cfg80211-owned data! */
55de908a 1008 ifmgd->associated->channel = sdata->local->_oper_channel;
cc32abd4 1009
57eebdf3 1010 /* XXX: wait for a beacon first? */
cc32abd4
JB		 1011 ieee80211_wake_queues_by_reason(&sdata->local->hw,
1012 IEEE80211_QUEUE_STOP_REASON_CSA);
77fdaa12
JB		 1013 out:
1014 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
1015 mutex_unlock(&ifmgd->mtx);
cc32abd4
JB		 1016}
1017
5ce6e438
JB		 1018void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1019{
55de908a
JB		 1020 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1021 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5ce6e438
JB		 1022
1023 trace_api_chswitch_done(sdata, success);
1024 if (!success) {
882a7c69
JB		 1025 sdata_info(sdata,
1026 "driver channel switch failed, disconnecting\n");
1027 ieee80211_queue_work(&sdata->local->hw,
1028 &ifmgd->csa_connection_drop_work);
1029 } else {
1030 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
5ce6e438 1031 }
5ce6e438
JB		 1032}
1033EXPORT_SYMBOL(ieee80211_chswitch_done);
1034
cc32abd4
JB		 1035static void ieee80211_chswitch_timer(unsigned long data)
1036{
1037 struct ieee80211_sub_if_data *sdata =
1038 (struct ieee80211_sub_if_data *) data;
5bb644a0 1039
9b7d72c1 1040 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
cc32abd4
JB		 1041}
1042
4a3cb702
JB		 1043void
1044ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1045 const struct ieee80211_channel_sw_ie *sw_elem,
1046 struct ieee80211_bss *bss, u64 timestamp)
cc32abd4 1047{
0c1ad2ca
JB		 1048 struct cfg80211_bss *cbss =
1049 container_of((void *)bss, struct cfg80211_bss, priv);
cc32abd4
JB		 1050 struct ieee80211_channel *new_ch;
1051 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
59eb21a6
BR		 1052 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num,
1053 cbss->channel->band);
55de908a 1054 struct ieee80211_chanctx *chanctx;
cc32abd4 1055
77fdaa12
JB		 1056 ASSERT_MGD_MTX(ifmgd);
1057
1058 if (!ifmgd->associated)
cc32abd4
JB		 1059 return;
1060
fbe9c429 1061 if (sdata->local->scanning)
cc32abd4
JB		 1062 return;
1063
1064 /* Disregard subsequent beacons if we are already running a timer
1065 processing a CSA */
1066
1067 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
1068 return;
1069
1070 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
882a7c69
JB		 1071 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED) {
1072 sdata_info(sdata,
1073 "AP %pM switches to unsupported channel (%d MHz), disconnecting\n",
1074 ifmgd->associated->bssid, new_freq);
1075 ieee80211_queue_work(&sdata->local->hw,
1076 &ifmgd->csa_connection_drop_work);
cc32abd4 1077 return;
882a7c69 1078 }
cc32abd4 1079
57eebdf3
JB		 1080 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
1081
55de908a
JB		 1082 if (sdata->local->use_chanctx) {
1083 sdata_info(sdata,
1084 "not handling channel switch with channel contexts\n");
1085 ieee80211_queue_work(&sdata->local->hw,
1086 &ifmgd->csa_connection_drop_work);
246dc3fd 1087 return;
55de908a
JB		 1088 }
1089
1090 mutex_lock(&sdata->local->chanctx_mtx);
1091 if (WARN_ON(!rcu_access_pointer(sdata->vif.chanctx_conf))) {
1092 mutex_unlock(&sdata->local->chanctx_mtx);
1093 return;
1094 }
1095 chanctx = container_of(rcu_access_pointer(sdata->vif.chanctx_conf),
1096 struct ieee80211_chanctx, conf);
1097 if (chanctx->refcount > 1) {
1098 sdata_info(sdata,
1099 "channel switch with multiple interfaces on the same channel, disconnecting\n");
1100 ieee80211_queue_work(&sdata->local->hw,
1101 &ifmgd->csa_connection_drop_work);
1102 mutex_unlock(&sdata->local->chanctx_mtx);
1103 return;
1104 }
1105 mutex_unlock(&sdata->local->chanctx_mtx);
1106
1107 sdata->local->csa_channel = new_ch;
1108
57eebdf3
JB		 1109 if (sw_elem->mode)
1110 ieee80211_stop_queues_by_reason(&sdata->local->hw,
1111 IEEE80211_QUEUE_STOP_REASON_CSA);
1112
5ce6e438
JB		 1113 if (sdata->local->ops->channel_switch) {
1114 /* use driver's channel switch callback */
57eebdf3
JB		 1115 struct ieee80211_channel_switch ch_switch = {
1116 .timestamp = timestamp,
1117 .block_tx = sw_elem->mode,
1118 .channel = new_ch,
1119 .count = sw_elem->count,
1120 };
1121
5ce6e438
JB		 1122 drv_channel_switch(sdata->local, &ch_switch);
1123 return;
1124 }
1125
1126 /* channel switch handled in software */
57eebdf3 1127 if (sw_elem->count <= 1)
42935eca 1128 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
57eebdf3 1129 else
cc32abd4 1130 mod_timer(&ifmgd->chswitch_timer,
3049000b
JB		 1131 TU_TO_EXP_TIME(sw_elem->count *
1132 cbss->beacon_interval));
cc32abd4
JB		 1133}
1134
1ea6f9c0
JB		 1135static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1136 struct ieee80211_channel *channel,
1137 const u8 *country_ie, u8 country_ie_len,
1138 const u8 *pwr_constr_elem)
cc32abd4 1139{
04b7b2ff
JB		 1140 struct ieee80211_country_ie_triplet *triplet;
1141 int chan = ieee80211_frequency_to_channel(channel->center_freq);
1142 int i, chan_pwr, chan_increment, new_ap_level;
1143 bool have_chan_pwr = false;
cc32abd4 1144
04b7b2ff
JB		 1145 /* Invalid IE */
1146 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1ea6f9c0 1147 return 0;
cc32abd4 1148
04b7b2ff
JB		 1149 triplet = (void *)(country_ie + 3);
1150 country_ie_len -= 3;
1151
1152 switch (channel->band) {
1153 default:
1154 WARN_ON_ONCE(1);
1155 /* fall through */
1156 case IEEE80211_BAND_2GHZ:
1157 case IEEE80211_BAND_60GHZ:
1158 chan_increment = 1;
1159 break;
1160 case IEEE80211_BAND_5GHZ:
1161 chan_increment = 4;
1162 break;
cc32abd4 1163 }
04b7b2ff
JB		 1164
1165 /* find channel */
1166 while (country_ie_len >= 3) {
1167 u8 first_channel = triplet->chans.first_channel;
1168
1169 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1170 goto next;
1171
1172 for (i = 0; i < triplet->chans.num_channels; i++) {
1173 if (first_channel + i * chan_increment == chan) {
1174 have_chan_pwr = true;
1175 chan_pwr = triplet->chans.max_power;
1176 break;
1177 }
1178 }
1179 if (have_chan_pwr)
1180 break;
1181
1182 next:
1183 triplet++;
1184 country_ie_len -= 3;
1185 }
1186
1187 if (!have_chan_pwr)
1ea6f9c0 1188 return 0;
04b7b2ff
JB		 1189
1190 new_ap_level = max_t(int, 0, chan_pwr - *pwr_constr_elem);
1191
1ea6f9c0
JB		 1192 if (sdata->ap_power_level == new_ap_level)
1193 return 0;
04b7b2ff
JB		 1194
1195 sdata_info(sdata,
1196 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1197 new_ap_level, chan_pwr, *pwr_constr_elem,
1198 sdata->u.mgd.bssid);
1ea6f9c0
JB		 1199 sdata->ap_power_level = new_ap_level;
1200 if (__ieee80211_recalc_txpower(sdata))
1201 return BSS_CHANGED_TXPOWER;
1202 return 0;
cc32abd4
JB		 1203}
1204
965bedad
JB		 1205/* powersave */
1206static void ieee80211_enable_ps(struct ieee80211_local *local,
1207 struct ieee80211_sub_if_data *sdata)
1208{
1209 struct ieee80211_conf *conf = &local->hw.conf;
1210
d5edaedc
JB		 1211 /*
1212 * If we are scanning right now then the parameters will
1213 * take effect when scan finishes.
1214 */
fbe9c429 1215 if (local->scanning)
d5edaedc
JB		 1216 return;
1217
965bedad
JB		 1218 if (conf->dynamic_ps_timeout > 0 &&
1219 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
1220 mod_timer(&local->dynamic_ps_timer, jiffies +
1221 msecs_to_jiffies(conf->dynamic_ps_timeout));
1222 } else {
1223 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1224 ieee80211_send_nullfunc(local, sdata, 1);
375177bf 1225
2a13052f
JO		 1226 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1227 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
1228 return;
1229
1230 conf->flags |= IEEE80211_CONF_PS;
1231 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965bedad
JB		 1232 }
1233}
1234
1235static void ieee80211_change_ps(struct ieee80211_local *local)
1236{
1237 struct ieee80211_conf *conf = &local->hw.conf;
1238
1239 if (local->ps_sdata) {
965bedad
JB		 1240 ieee80211_enable_ps(local, local->ps_sdata);
1241 } else if (conf->flags & IEEE80211_CONF_PS) {
1242 conf->flags &= ~IEEE80211_CONF_PS;
1243 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1244 del_timer_sync(&local->dynamic_ps_timer);
1245 cancel_work_sync(&local->dynamic_ps_enable_work);
1246 }
1247}
1248
808118cb
JY		 1249static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1250{
1251 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1252 struct sta_info *sta = NULL;
c2c98fde 1253 bool authorized = false;
808118cb
JY		 1254
1255 if (!mgd->powersave)
1256 return false;
1257
05cb9108
JB		 1258 if (mgd->broken_ap)
1259 return false;
1260
808118cb
JY		 1261 if (!mgd->associated)
1262 return false;
1263
808118cb
JY		 1264 if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
1265 IEEE80211_STA_CONNECTION_POLL))
1266 return false;
1267
1268 rcu_read_lock();
1269 sta = sta_info_get(sdata, mgd->bssid);
1270 if (sta)
c2c98fde 1271 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
808118cb
JY		 1272 rcu_read_unlock();
1273
c2c98fde 1274 return authorized;
808118cb
JY		 1275}
1276
965bedad 1277/* need to hold RTNL or interface lock */
10f644a4 1278void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 1279{
1280 struct ieee80211_sub_if_data *sdata, *found = NULL;
1281 int count = 0;
195e294d 1282 int timeout;
965bedad
JB		 1283
1284 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
1285 local->ps_sdata = NULL;
1286 return;
1287 }
1288
1289 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 1290 if (!ieee80211_sdata_running(sdata))
965bedad 1291 continue;
8c7914de
RM		 1292 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1293 /* If an AP vif is found, then disable PS
1294 * by setting the count to zero thereby setting
1295 * ps_sdata to NULL.
1296 */
1297 count = 0;
1298 break;
1299 }
965bedad
JB		 1300 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1301 continue;
1302 found = sdata;
1303 count++;
1304 }
1305
808118cb 1306 if (count == 1 && ieee80211_powersave_allowed(found)) {
10f644a4
JB		 1307 s32 beaconint_us;
1308
1309 if (latency < 0)
ed77134b 1310 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
10f644a4
JB		 1311
1312 beaconint_us = ieee80211_tu_to_usec(
1313 found->vif.bss_conf.beacon_int);
1314
ff616381 1315 timeout = local->dynamic_ps_forced_timeout;
195e294d
JO		 1316 if (timeout < 0) {
1317 /*
ff616381
JO		 1318 * Go to full PSM if the user configures a very low
1319 * latency requirement.
0ab82b04
EP		 1320 * The 2000 second value is there for compatibility
1321 * until the PM_QOS_NETWORK_LATENCY is configured
1322 * with real values.
195e294d 1323 */
0ab82b04
EP		 1324 if (latency > (1900 * USEC_PER_MSEC) &&
1325 latency != (2000 * USEC_PER_SEC))
195e294d 1326 timeout = 0;
ff616381
JO		 1327 else
1328 timeout = 100;
195e294d 1329 }
09b85568 1330 local->hw.conf.dynamic_ps_timeout = timeout;
195e294d 1331
04fe2037 1332 if (beaconint_us > latency) {
10f644a4 1333 local->ps_sdata = NULL;
04fe2037 1334 } else {
04fe2037 1335 int maxslp = 1;
826262c3 1336 u8 dtimper = found->u.mgd.dtim_period;
56007a02
JB		 1337
1338 /* If the TIM IE is invalid, pretend the value is 1 */
1339 if (!dtimper)
1340 dtimper = 1;
1341 else if (dtimper > 1)
04fe2037
JB		 1342 maxslp = min_t(int, dtimper,
1343 latency / beaconint_us);
1344
9ccebe61 1345 local->hw.conf.max_sleep_period = maxslp;
56007a02 1346 local->hw.conf.ps_dtim_period = dtimper;
10f644a4 1347 local->ps_sdata = found;
04fe2037 1348 }
10f644a4 1349 } else {
965bedad 1350 local->ps_sdata = NULL;
10f644a4 1351 }
965bedad
JB		 1352
1353 ieee80211_change_ps(local);
1354}
1355
ab095877
EP		 1356void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1357{
1358 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1359
1360 if (sdata->vif.bss_conf.ps != ps_allowed) {
1361 sdata->vif.bss_conf.ps = ps_allowed;
1362 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1363 }
1364}
1365
965bedad
JB		 1366void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1367{
1368 struct ieee80211_local *local =
1369 container_of(work, struct ieee80211_local,
1370 dynamic_ps_disable_work);
1371
1372 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1373 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1374 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1375 }
1376
1377 ieee80211_wake_queues_by_reason(&local->hw,
1378 IEEE80211_QUEUE_STOP_REASON_PS);
1379}
1380
1381void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1382{
1383 struct ieee80211_local *local =
1384 container_of(work, struct ieee80211_local,
1385 dynamic_ps_enable_work);
1386 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
5e34069c 1387 struct ieee80211_if_managed *ifmgd;
1ddc2867
RM		 1388 unsigned long flags;
1389 int q;
965bedad
JB		 1390
1391 /* can only happen when PS was just disabled anyway */
1392 if (!sdata)
1393 return;
1394
5e34069c
CL		 1395 ifmgd = &sdata->u.mgd;
1396
965bedad
JB		 1397 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1398 return;
1399
09b85568 1400 if (local->hw.conf.dynamic_ps_timeout > 0) {
77b7023a
AN		 1401 /* don't enter PS if TX frames are pending */
1402 if (drv_tx_frames_pending(local)) {
1ddc2867
RM		 1403 mod_timer(&local->dynamic_ps_timer, jiffies +
1404 msecs_to_jiffies(
1405 local->hw.conf.dynamic_ps_timeout));
1406 return;
1407 }
77b7023a
AN		 1408
1409 /*
1410 * transmission can be stopped by others which leads to
1411 * dynamic_ps_timer expiry. Postpone the ps timer if it
1412 * is not the actual idle state.
1413 */
1414 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1415 for (q = 0; q < local->hw.queues; q++) {
1416 if (local->queue_stop_reasons[q]) {
1417 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1418 flags);
1419 mod_timer(&local->dynamic_ps_timer, jiffies +
1420 msecs_to_jiffies(
1421 local->hw.conf.dynamic_ps_timeout));
1422 return;
1423 }
1424 }
1425 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1ddc2867 1426 }
1ddc2867 1427
375177bf 1428 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
9c38a8b4 1429 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
f3e85b9e 1430 netif_tx_stop_all_queues(sdata->dev);
965bedad 1431
e8306f98
VN		 1432 if (drv_tx_frames_pending(local))
1433 mod_timer(&local->dynamic_ps_timer, jiffies +
1434 msecs_to_jiffies(
1435 local->hw.conf.dynamic_ps_timeout));
1436 else {
1437 ieee80211_send_nullfunc(local, sdata, 1);
1438 /* Flush to get the tx status of nullfunc frame */
39ecc01d 1439 ieee80211_flush_queues(local, sdata);
e8306f98 1440 }
f3e85b9e
VN		 1441 }
1442
2a13052f
JO		 1443 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1444 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
375177bf
VN		 1445 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1446 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1447 local->hw.conf.flags |= IEEE80211_CONF_PS;
1448 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1449 }
f3e85b9e 1450
77b7023a
AN		 1451 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1452 netif_tx_wake_all_queues(sdata->dev);
965bedad
JB		 1453}
1454
1455void ieee80211_dynamic_ps_timer(unsigned long data)
1456{
1457 struct ieee80211_local *local = (void *) data;
1458
78f1a8b7 1459 if (local->quiescing || local->suspended)
5bb644a0
JB		 1460 return;
1461
42935eca 1462 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 1463}
1464
164eb02d
SW		 1465void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1466{
1467 struct delayed_work *delayed_work =
1468 container_of(work, struct delayed_work, work);
1469 struct ieee80211_sub_if_data *sdata =
1470 container_of(delayed_work, struct ieee80211_sub_if_data,
1471 dfs_cac_timer_work);
1472
1473 ieee80211_vif_release_channel(sdata);
1474
1475 cfg80211_cac_event(sdata->dev, NL80211_RADAR_CAC_FINISHED, GFP_KERNEL);
1476}
1477
60f8b39c 1478/* MLME */
7d25745d 1479static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
4ced3f74 1480 struct ieee80211_sub_if_data *sdata,
4a3cb702 1481 const u8 *wmm_param, size_t wmm_param_len)
f0706e82 1482{
f0706e82 1483 struct ieee80211_tx_queue_params params;
4ced3f74 1484 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1485 size_t left;
1486 int count;
4a3cb702
JB		 1487 const u8 *pos;
1488 u8 uapsd_queues = 0;
f0706e82 1489
e1b3ec1a 1490 if (!local->ops->conf_tx)
7d25745d 1491 return false;
e1b3ec1a 1492
32c5057b 1493 if (local->hw.queues < IEEE80211_NUM_ACS)
7d25745d 1494 return false;
3434fbd3
JB		 1495
1496 if (!wmm_param)
7d25745d 1497 return false;
3434fbd3 1498
f0706e82 1499 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
7d25745d 1500 return false;
ab13315a
KV		 1501
1502 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
dc41e4d4 1503 uapsd_queues = ifmgd->uapsd_queues;
ab13315a 1504
f0706e82 1505 count = wmm_param[6] & 0x0f;
46900298 1506 if (count == ifmgd->wmm_last_param_set)
7d25745d 1507 return false;
46900298 1508 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 1509
1510 pos = wmm_param + 8;
1511 left = wmm_param_len - 8;
1512
1513 memset(&params, 0, sizeof(params));
1514
00e96dec 1515 sdata->wmm_acm = 0;
f0706e82
JB		 1516 for (; left >= 4; left -= 4, pos += 4) {
1517 int aci = (pos[0] >> 5) & 0x03;
1518 int acm = (pos[0] >> 4) & 0x01;
ab13315a 1519 bool uapsd = false;
f0706e82
JB		 1520 int queue;
1521
1522 switch (aci) {
0eeb59fe 1523 case 1: /* AC_BK */
e100bb64 1524 queue = 3;
988c0f72 1525 if (acm)
00e96dec 1526 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV		 1527 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1528 uapsd = true;
f0706e82 1529 break;
0eeb59fe 1530 case 2: /* AC_VI */
e100bb64 1531 queue = 1;
988c0f72 1532 if (acm)
00e96dec 1533 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV		 1534 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1535 uapsd = true;
f0706e82 1536 break;
0eeb59fe 1537 case 3: /* AC_VO */
e100bb64 1538 queue = 0;
988c0f72 1539 if (acm)
00e96dec 1540 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV		 1541 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1542 uapsd = true;
f0706e82 1543 break;
0eeb59fe 1544 case 0: /* AC_BE */
f0706e82 1545 default:
e100bb64 1546 queue = 2;
988c0f72 1547 if (acm)
00e96dec 1548 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV		 1549 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1550 uapsd = true;
f0706e82
JB		 1551 break;
1552 }
1553
1554 params.aifs = pos[0] & 0x0f;
1555 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1556 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 1557 params.txop = get_unaligned_le16(pos + 2);
ab13315a
KV		 1558 params.uapsd = uapsd;
1559
bdcbd8e0
JB		 1560 mlme_dbg(sdata,
1561 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1562 queue, aci, acm,
1563 params.aifs, params.cw_min, params.cw_max,
1564 params.txop, params.uapsd);
f6f3def3
EP		 1565 sdata->tx_conf[queue] = params;
1566 if (drv_conf_tx(local, sdata, queue, &params))
bdcbd8e0
JB		 1567 sdata_err(sdata,
1568 "failed to set TX queue parameters for queue %d\n",
1569 queue);
f0706e82 1570 }
e1b3ec1a
SG		 1571
1572 /* enable WMM or activate new settings */
4ced3f74 1573 sdata->vif.bss_conf.qos = true;
7d25745d 1574 return true;
f0706e82
JB		 1575}
1576
925e64c3
SG		 1577static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1578{
1579 lockdep_assert_held(&sdata->local->mtx);
1580
1581 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1582 IEEE80211_STA_BEACON_POLL);
1583 ieee80211_run_deferred_scan(sdata->local);
1584}
1585
1586static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1587{
1588 mutex_lock(&sdata->local->mtx);
1589 __ieee80211_stop_poll(sdata);
1590 mutex_unlock(&sdata->local->mtx);
1591}
1592
7a5158ef
JB		 1593static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1594 u16 capab, bool erp_valid, u8 erp)
5628221c 1595{
bda3933a 1596 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 1597 u32 changed = 0;
7a5158ef
JB		 1598 bool use_protection;
1599 bool use_short_preamble;
1600 bool use_short_slot;
1601
1602 if (erp_valid) {
1603 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1604 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1605 } else {
1606 use_protection = false;
1607 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1608 }
1609
1610 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
55de908a 1611 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
43d35343 1612 use_short_slot = true;
5628221c 1613
471b3efd 1614 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 1615 bss_conf->use_cts_prot = use_protection;
1616 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 1617 }
7e9ed188 1618
d43c7b37 1619 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 1620 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 1621 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 1622 }
d9430a32 1623
7a5158ef 1624 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 1625 bss_conf->use_short_slot = use_short_slot;
1626 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 1627 }
1628
1629 return changed;
1630}
1631
f698d856 1632static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 1633 struct cfg80211_bss *cbss,
ae5eb026 1634 u32 bss_info_changed)
f0706e82 1635{
0c1ad2ca 1636 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 1637 struct ieee80211_local *local = sdata->local;
68542962 1638 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
d6f2da5b 1639
ae5eb026 1640 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 1641 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
50ae34a2 1642 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 1643
7ccc8bd7
FF		 1644 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1645 IEEE80211_BEACON_LOSS_COUNT * bss_conf->beacon_int));
1646
0c1ad2ca
JB		 1647 sdata->u.mgd.associated = cbss;
1648 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 1649
17e4ec14
JM		 1650 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1651
488dd7b5 1652 if (sdata->vif.p2p) {
9caf0364 1653 const struct cfg80211_bss_ies *ies;
488dd7b5 1654
9caf0364
JB		 1655 rcu_read_lock();
1656 ies = rcu_dereference(cbss->ies);
1657 if (ies) {
1658 u8 noa[2];
1659 int ret;
1660
1661 ret = cfg80211_get_p2p_attr(
1662 ies->data, ies->len,
1663 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1664 noa, sizeof(noa));
1665 if (ret >= 2) {
1666 bss_conf->p2p_oppps = noa[1] & 0x80;
1667 bss_conf->p2p_ctwindow = noa[1] & 0x7f;
1668 bss_info_changed |= BSS_CHANGED_P2P_PS;
1669 sdata->u.mgd.p2p_noa_index = noa[0];
1670 }
488dd7b5 1671 }
9caf0364 1672 rcu_read_unlock();
488dd7b5
JB		 1673 }
1674
b291ba11 1675 /* just to be sure */
925e64c3 1676 ieee80211_stop_poll(sdata);
b291ba11 1677
9ac19a90 1678 ieee80211_led_assoc(local, 1);
9306102e 1679
c65dd147 1680 if (sdata->u.mgd.assoc_data->have_beacon) {
826262c3
JB		 1681 /*
1682 * If the AP is buggy we may get here with no DTIM period
1683 * known, so assume it's 1 which is the only safe assumption
1684 * in that case, although if the TIM IE is broken powersave
1685 * probably just won't work at all.
1686 */
1687 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
c65dd147 1688 bss_info_changed |= BSS_CHANGED_DTIM_PERIOD;
826262c3 1689 } else {
e5b900d2 1690 bss_conf->dtim_period = 0;
826262c3 1691 }
e5b900d2 1692
68542962 1693 bss_conf->assoc = 1;
9cef8737 1694
a97c13c3 1695 /* Tell the driver to monitor connection quality (if supported) */
ea086359 1696 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
68542962 1697 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 1698 bss_info_changed |= BSS_CHANGED_CQM;
1699
68542962 1700 /* Enable ARP filtering */
0f19b41e 1701 if (bss_conf->arp_addr_cnt)
68542962 1702 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
68542962 1703
ae5eb026 1704 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 1705
056508dc
JB		 1706 mutex_lock(&local->iflist_mtx);
1707 ieee80211_recalc_ps(local, -1);
1708 mutex_unlock(&local->iflist_mtx);
e0cb686f 1709
04ecd257 1710 ieee80211_recalc_smps(sdata);
ab095877
EP		 1711 ieee80211_recalc_ps_vif(sdata);
1712
8a5b33f5 1713 netif_tx_start_all_queues(sdata->dev);
9ac19a90 1714 netif_carrier_on(sdata->dev);
f0706e82
JB		 1715}
1716
e69e95db 1717static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
37ad3888
JB		 1718 u16 stype, u16 reason, bool tx,
1719 u8 *frame_buf)
aa458d17 1720{
46900298 1721 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17 1722 struct ieee80211_local *local = sdata->local;
3cc5240b 1723 u32 changed = 0;
aa458d17 1724
77fdaa12
JB		 1725 ASSERT_MGD_MTX(ifmgd);
1726
37ad3888
JB		 1727 if (WARN_ON_ONCE(tx && !frame_buf))
1728 return;
1729
b291ba11
JB		 1730 if (WARN_ON(!ifmgd->associated))
1731 return;
1732
79543d8e
DS		 1733 ieee80211_stop_poll(sdata);
1734
77fdaa12 1735 ifmgd->associated = NULL;
77fdaa12
JB		 1736
1737 /*
1738 * we need to commit the associated = NULL change because the
1739 * scan code uses that to determine whether this iface should
1740 * go to/wake up from powersave or not -- and could otherwise
1741 * wake the queues erroneously.
1742 */
1743 smp_mb();
1744
1745 /*
1746 * Thus, we can only afterwards stop the queues -- to account
1747 * for the case where another CPU is finishing a scan at this
1748 * time -- we don't want the scan code to enable queues.
1749 */
aa458d17 1750
8a5b33f5 1751 netif_tx_stop_all_queues(sdata->dev);
aa458d17
TW		 1752 netif_carrier_off(sdata->dev);
1753
88bc40e8
EP		 1754 /*
1755 * if we want to get out of ps before disassoc (why?) we have
1756 * to do it before sending disassoc, as otherwise the null-packet
1757 * won't be valid.
1758 */
1759 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1760 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1761 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1762 }
1763 local->ps_sdata = NULL;
1764
ab095877
EP		 1765 /* disable per-vif ps */
1766 ieee80211_recalc_ps_vif(sdata);
1767
f823981e
EP		 1768 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1769 if (tx)
39ecc01d 1770 ieee80211_flush_queues(local, sdata);
f823981e 1771
37ad3888
JB		 1772 /* deauthenticate/disassociate now */
1773 if (tx || frame_buf)
88a9e31c
EP		 1774 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
1775 reason, tx, frame_buf);
37ad3888
JB		 1776
1777 /* flush out frame */
1778 if (tx)
39ecc01d 1779 ieee80211_flush_queues(local, sdata);
37ad3888 1780
88a9e31c
EP		 1781 /* clear bssid only after building the needed mgmt frames */
1782 memset(ifmgd->bssid, 0, ETH_ALEN);
1783
37ad3888 1784 /* remove AP and TDLS peers */
051007d9 1785 sta_info_flush_defer(sdata);
37ad3888
JB		 1786
1787 /* finally reset all BSS / config parameters */
f5e5bf25
TW		 1788 changed |= ieee80211_reset_erp_info(sdata);
1789
f5e5bf25 1790 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 1791 changed |= BSS_CHANGED_ASSOC;
1792 sdata->vif.bss_conf.assoc = false;
f5e5bf25 1793
488dd7b5
JB		 1794 sdata->vif.bss_conf.p2p_ctwindow = 0;
1795 sdata->vif.bss_conf.p2p_oppps = false;
1796
dd5ecfea 1797 /* on the next assoc, re-program HT/VHT parameters */
ef96a842
BG		 1798 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1799 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
dd5ecfea
JB		 1800 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
1801 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
413ad50a 1802
1ea6f9c0 1803 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
a8302de9 1804
520eb820
KV		 1805 del_timer_sync(&local->dynamic_ps_timer);
1806 cancel_work_sync(&local->dynamic_ps_enable_work);
1807
68542962 1808 /* Disable ARP filtering */
0f19b41e 1809 if (sdata->vif.bss_conf.arp_addr_cnt)
68542962 1810 changed |= BSS_CHANGED_ARP_FILTER;
68542962 1811
3abead59
JB		 1812 sdata->vif.bss_conf.qos = false;
1813 changed |= BSS_CHANGED_QOS;
1814
0aaffa9b
JB		 1815 /* The BSSID (not really interesting) and HT changed */
1816 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 1817 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 1818
3abead59
JB		 1819 /* disassociated - set to defaults now */
1820 ieee80211_set_wmm_default(sdata, false);
1821
b9dcf712
JB		 1822 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1823 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1824 del_timer_sync(&sdata->u.mgd.timer);
1825 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2d9957cc 1826
826262c3
JB		 1827 sdata->vif.bss_conf.dtim_period = 0;
1828
028e8da0
JB		 1829 ifmgd->flags = 0;
1830 ieee80211_vif_release_channel(sdata);
aa458d17 1831}
f0706e82 1832
3cf335d5
KV		 1833void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1834 struct ieee80211_hdr *hdr)
1835{
1836 /*
1837 * We can postpone the mgd.timer whenever receiving unicast frames
1838 * from AP because we know that the connection is working both ways
1839 * at that time. But multicast frames (and hence also beacons) must
1840 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 1841 * data idle periods for sending the periodic probe request to the
1842 * AP we're connected to.
3cf335d5 1843 */
b291ba11
JB		 1844 if (is_multicast_ether_addr(hdr->addr1))
1845 return;
1846
be099e82 1847 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 1848}
f0706e82 1849
4e5ff376
FF		 1850static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1851{
1852 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
133d40f9 1853 struct ieee80211_local *local = sdata->local;
4e5ff376 1854
133d40f9 1855 mutex_lock(&local->mtx);
4e5ff376 1856 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
133d40f9
SG		 1857 IEEE80211_STA_CONNECTION_POLL))) {
1858 mutex_unlock(&local->mtx);
1859 return;
1860 }
4e5ff376 1861
925e64c3 1862 __ieee80211_stop_poll(sdata);
133d40f9
SG		 1863
1864 mutex_lock(&local->iflist_mtx);
1865 ieee80211_recalc_ps(local, -1);
1866 mutex_unlock(&local->iflist_mtx);
4e5ff376
FF		 1867
1868 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
133d40f9 1869 goto out;
4e5ff376
FF		 1870
1871 /*
1872 * We've received a probe response, but are not sure whether
1873 * we have or will be receiving any beacons or data, so let's
1874 * schedule the timers again, just in case.
1875 */
1876 ieee80211_sta_reset_beacon_monitor(sdata);
1877
1878 mod_timer(&ifmgd->conn_mon_timer,
1879 round_jiffies_up(jiffies +
1880 IEEE80211_CONNECTION_IDLE_TIME));
133d40f9 1881out:
133d40f9 1882 mutex_unlock(&local->mtx);
4e5ff376
FF		 1883}
1884
1885void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
04ac3c0e 1886 struct ieee80211_hdr *hdr, bool ack)
4e5ff376 1887{
75706d0e 1888 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF		 1889 return;
1890
4e5ff376
FF		 1891 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1892 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e 1893 if (ack)
cab1c7fd 1894 ieee80211_sta_reset_conn_monitor(sdata);
04ac3c0e
FF		 1895 else
1896 sdata->u.mgd.nullfunc_failed = true;
4e5ff376 1897 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
cab1c7fd 1898 return;
4e5ff376 1899 }
cab1c7fd
WD		 1900
1901 if (ack)
1902 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF		 1903}
1904
a43abf29
ML		 1905static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1906{
1907 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1908 const u8 *ssid;
f01a067d 1909 u8 *dst = ifmgd->associated->bssid;
180205bd 1910 u8 unicast_limit = max(1, max_probe_tries - 3);
f01a067d
LR		 1911
1912 /*
1913 * Try sending broadcast probe requests for the last three
1914 * probe requests after the first ones failed since some
1915 * buggy APs only support broadcast probe requests.
1916 */
1917 if (ifmgd->probe_send_count >= unicast_limit)
1918 dst = NULL;
a43abf29 1919
4e5ff376
FF		 1920 /*
1921 * When the hardware reports an accurate Tx ACK status, it's
1922 * better to send a nullfunc frame instead of a probe request,
1923 * as it will kick us off the AP quickly if we aren't associated
1924 * anymore. The timeout will be reset if the frame is ACKed by
1925 * the AP.
1926 */
992e68bf
SD		 1927 ifmgd->probe_send_count++;
1928
04ac3c0e
FF		 1929 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1930 ifmgd->nullfunc_failed = false;
4e5ff376 1931 ieee80211_send_nullfunc(sdata->local, sdata, 0);
04ac3c0e 1932 } else {
88c868c4
SG		 1933 int ssid_len;
1934
9caf0364 1935 rcu_read_lock();
4e5ff376 1936 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
88c868c4
SG		 1937 if (WARN_ON_ONCE(ssid == NULL))
1938 ssid_len = 0;
1939 else
1940 ssid_len = ssid[1];
1941
1942 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
1672c0e3 1943 0, (u32) -1, true, 0,
55de908a 1944 ifmgd->associated->channel, false);
9caf0364 1945 rcu_read_unlock();
4e5ff376 1946 }
a43abf29 1947
180205bd 1948 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
a43abf29 1949 run_again(ifmgd, ifmgd->probe_timeout);
f69b9c79 1950 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
39ecc01d 1951 ieee80211_flush_queues(sdata->local, sdata);
a43abf29
ML		 1952}
1953
b291ba11
JB		 1954static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1955 bool beacon)
04de8381 1956{
04de8381 1957 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 1958 bool already = false;
34bfc411 1959
9607e6b6 1960 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 1961 return;
1962
77fdaa12
JB		 1963 mutex_lock(&ifmgd->mtx);
1964
1965 if (!ifmgd->associated)
1966 goto out;
1967
133d40f9
SG		 1968 mutex_lock(&sdata->local->mtx);
1969
1970 if (sdata->local->tmp_channel || sdata->local->scanning) {
1971 mutex_unlock(&sdata->local->mtx);
1972 goto out;
1973 }
1974
e87cc472 1975 if (beacon)
bdcbd8e0 1976 mlme_dbg_ratelimited(sdata,
112c31f0 1977 "detected beacon loss from AP - probing\n");
bdcbd8e0 1978
6efb71b0
HS		 1979 ieee80211_cqm_rssi_notify(&sdata->vif,
1980 NL80211_CQM_RSSI_BEACON_LOSS_EVENT, GFP_KERNEL);
04de8381 1981
b291ba11
JB		 1982 /*
1983 * The driver/our work has already reported this event or the
1984 * connection monitoring has kicked in and we have already sent
1985 * a probe request. Or maybe the AP died and the driver keeps
1986 * reporting until we disassociate...
1987 *
1988 * In either case we have to ignore the current call to this
1989 * function (except for setting the correct probe reason bit)
1990 * because otherwise we would reset the timer every time and
1991 * never check whether we received a probe response!
1992 */
1993 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1994 IEEE80211_STA_CONNECTION_POLL))
1995 already = true;
1996
1997 if (beacon)
1998 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1999 else
2000 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2001
133d40f9
SG		 2002 mutex_unlock(&sdata->local->mtx);
2003
b291ba11
JB		 2004 if (already)
2005 goto out;
2006
4e751843
JB		 2007 mutex_lock(&sdata->local->iflist_mtx);
2008 ieee80211_recalc_ps(sdata->local, -1);
2009 mutex_unlock(&sdata->local->iflist_mtx);
2010
a43abf29
ML		 2011 ifmgd->probe_send_count = 0;
2012 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12
JB		 2013 out:
2014 mutex_unlock(&ifmgd->mtx);
04de8381
KV		 2015}
2016
a619a4c0
JO		 2017struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2018 struct ieee80211_vif *vif)
2019{
2020 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2021 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d9b3b28b 2022 struct cfg80211_bss *cbss;
a619a4c0
JO		 2023 struct sk_buff *skb;
2024 const u8 *ssid;
88c868c4 2025 int ssid_len;
a619a4c0
JO		 2026
2027 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2028 return NULL;
2029
2030 ASSERT_MGD_MTX(ifmgd);
2031
d9b3b28b
EP		 2032 if (ifmgd->associated)
2033 cbss = ifmgd->associated;
2034 else if (ifmgd->auth_data)
2035 cbss = ifmgd->auth_data->bss;
2036 else if (ifmgd->assoc_data)
2037 cbss = ifmgd->assoc_data->bss;
2038 else
a619a4c0
JO		 2039 return NULL;
2040
9caf0364 2041 rcu_read_lock();
d9b3b28b 2042 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
88c868c4
SG		 2043 if (WARN_ON_ONCE(ssid == NULL))
2044 ssid_len = 0;
2045 else
2046 ssid_len = ssid[1];
2047
d9b3b28b 2048 skb = ieee80211_build_probe_req(sdata, cbss->bssid,
55de908a 2049 (u32) -1, cbss->channel,
6b77863b 2050 ssid + 2, ssid_len,
85a237fe 2051 NULL, 0, true);
9caf0364 2052 rcu_read_unlock();
a619a4c0
JO		 2053
2054 return skb;
2055}
2056EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2057
eef9e54c 2058static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
1e4dcd01
JO		 2059{
2060 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 2061 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
1e4dcd01
JO		 2062
2063 mutex_lock(&ifmgd->mtx);
2064 if (!ifmgd->associated) {
2065 mutex_unlock(&ifmgd->mtx);
2066 return;
2067 }
2068
37ad3888
JB		 2069 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2070 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
eef9e54c 2071 true, frame_buf);
882a7c69 2072 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
5b36ebd8
JB		 2073 ieee80211_wake_queues_by_reason(&sdata->local->hw,
2074 IEEE80211_QUEUE_STOP_REASON_CSA);
1e4dcd01 2075 mutex_unlock(&ifmgd->mtx);
7da7cc1d 2076
1e4dcd01
JO		 2077 /*
2078 * must be outside lock due to cfg80211,
2079 * but that's not a problem.
2080 */
6ae16775 2081 cfg80211_send_deauth(sdata->dev, frame_buf, IEEE80211_DEAUTH_FRAME_LEN);
1e4dcd01
JO		 2082}
2083
cc74c0c7 2084static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 2085{
2086 struct ieee80211_sub_if_data *sdata =
2087 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 2088 u.mgd.beacon_connection_loss_work);
a85e1d55
PS		 2089 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2090 struct sta_info *sta;
2091
2092 if (ifmgd->associated) {
30fa9047 2093 rcu_read_lock();
a85e1d55
PS		 2094 sta = sta_info_get(sdata, ifmgd->bssid);
2095 if (sta)
2096 sta->beacon_loss_count++;
30fa9047 2097 rcu_read_unlock();
a85e1d55 2098 }
b291ba11 2099
682bd38b 2100 if (ifmgd->connection_loss) {
882a7c69
JB		 2101 sdata_info(sdata, "Connection to AP %pM lost\n",
2102 ifmgd->bssid);
eef9e54c 2103 __ieee80211_disconnect(sdata);
882a7c69 2104 } else {
1e4dcd01 2105 ieee80211_mgd_probe_ap(sdata, true);
882a7c69
JB		 2106 }
2107}
2108
2109static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2110{
2111 struct ieee80211_sub_if_data *sdata =
2112 container_of(work, struct ieee80211_sub_if_data,
2113 u.mgd.csa_connection_drop_work);
2114
eef9e54c 2115 __ieee80211_disconnect(sdata);
b291ba11
JB		 2116}
2117
04de8381
KV		 2118void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2119{
2120 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 2121 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 2122
b5878a2d
JB		 2123 trace_api_beacon_loss(sdata);
2124
1e4dcd01 2125 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
682bd38b 2126 sdata->u.mgd.connection_loss = false;
1e4dcd01 2127 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 2128}
2129EXPORT_SYMBOL(ieee80211_beacon_loss);
2130
1e4dcd01
JO		 2131void ieee80211_connection_loss(struct ieee80211_vif *vif)
2132{
2133 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2134 struct ieee80211_hw *hw = &sdata->local->hw;
2135
b5878a2d
JB		 2136 trace_api_connection_loss(sdata);
2137
682bd38b 2138 sdata->u.mgd.connection_loss = true;
1e4dcd01
JO		 2139 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2140}
2141EXPORT_SYMBOL(ieee80211_connection_loss);
2142
2143
66e67e41
JB		 2144static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2145 bool assoc)
2146{
2147 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2148
2149 lockdep_assert_held(&sdata->u.mgd.mtx);
2150
66e67e41
JB		 2151 if (!assoc) {
2152 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2153
2154 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2155 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
028e8da0 2156 sdata->u.mgd.flags = 0;
55de908a 2157 ieee80211_vif_release_channel(sdata);
66e67e41
JB		 2158 }
2159
5b112d3d 2160 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
66e67e41
JB		 2161 kfree(auth_data);
2162 sdata->u.mgd.auth_data = NULL;
2163}
2164
2165static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2166 struct ieee80211_mgmt *mgmt, size_t len)
2167{
1672c0e3 2168 struct ieee80211_local *local = sdata->local;
66e67e41
JB		 2169 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2170 u8 *pos;
2171 struct ieee802_11_elems elems;
1672c0e3 2172 u32 tx_flags = 0;
66e67e41
JB		 2173
2174 pos = mgmt->u.auth.variable;
2175 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2176 if (!elems.challenge)
2177 return;
2178 auth_data->expected_transaction = 4;
a1845fc7 2179 drv_mgd_prepare_tx(sdata->local, sdata);
1672c0e3
JB		 2180 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2181 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2182 IEEE80211_TX_INTFL_MLME_CONN_TX;
700e8ea6 2183 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
66e67e41
JB		 2184 elems.challenge - 2, elems.challenge_len + 2,
2185 auth_data->bss->bssid, auth_data->bss->bssid,
2186 auth_data->key, auth_data->key_len,
1672c0e3 2187 auth_data->key_idx, tx_flags);
66e67e41
JB		 2188}
2189
2190static enum rx_mgmt_action __must_check
2191ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2192 struct ieee80211_mgmt *mgmt, size_t len)
2193{
2194 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2195 u8 bssid[ETH_ALEN];
2196 u16 auth_alg, auth_transaction, status_code;
2197 struct sta_info *sta;
2198
2199 lockdep_assert_held(&ifmgd->mtx);
2200
2201 if (len < 24 + 6)
2202 return RX_MGMT_NONE;
2203
2204 if (!ifmgd->auth_data || ifmgd->auth_data->done)
2205 return RX_MGMT_NONE;
2206
2207 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2208
b203ca39 2209 if (!ether_addr_equal(bssid, mgmt->bssid))
66e67e41
JB		 2210 return RX_MGMT_NONE;
2211
2212 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2213 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2214 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2215
2216 if (auth_alg != ifmgd->auth_data->algorithm ||
0f4126e8
JM		 2217 auth_transaction != ifmgd->auth_data->expected_transaction) {
2218 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2219 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2220 auth_transaction,
2221 ifmgd->auth_data->expected_transaction);
66e67e41 2222 return RX_MGMT_NONE;
0f4126e8 2223 }
66e67e41
JB		 2224
2225 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2226 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2227 mgmt->sa, status_code);
dac211ec
EP		 2228 ieee80211_destroy_auth_data(sdata, false);
2229 return RX_MGMT_CFG80211_RX_AUTH;
66e67e41
JB		 2230 }
2231
2232 switch (ifmgd->auth_data->algorithm) {
2233 case WLAN_AUTH_OPEN:
2234 case WLAN_AUTH_LEAP:
2235 case WLAN_AUTH_FT:
6b8ece3a 2236 case WLAN_AUTH_SAE:
66e67e41
JB		 2237 break;
2238 case WLAN_AUTH_SHARED_KEY:
2239 if (ifmgd->auth_data->expected_transaction != 4) {
2240 ieee80211_auth_challenge(sdata, mgmt, len);
2241 /* need another frame */
2242 return RX_MGMT_NONE;
2243 }
2244 break;
2245 default:
2246 WARN_ONCE(1, "invalid auth alg %d",
2247 ifmgd->auth_data->algorithm);
2248 return RX_MGMT_NONE;
2249 }
2250
bdcbd8e0 2251 sdata_info(sdata, "authenticated\n");
66e67e41
JB		 2252 ifmgd->auth_data->done = true;
2253 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
89afe614 2254 ifmgd->auth_data->timeout_started = true;
66e67e41
JB		 2255 run_again(ifmgd, ifmgd->auth_data->timeout);
2256
6b8ece3a
JM		 2257 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2258 ifmgd->auth_data->expected_transaction != 2) {
2259 /*
2260 * Report auth frame to user space for processing since another
2261 * round of Authentication frames is still needed.
2262 */
2263 return RX_MGMT_CFG80211_RX_AUTH;
2264 }
2265
66e67e41
JB		 2266 /* move station state to auth */
2267 mutex_lock(&sdata->local->sta_mtx);
2268 sta = sta_info_get(sdata, bssid);
2269 if (!sta) {
2270 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2271 goto out_err;
2272 }
2273 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
bdcbd8e0 2274 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
66e67e41
JB		 2275 goto out_err;
2276 }
2277 mutex_unlock(&sdata->local->sta_mtx);
2278
2279 return RX_MGMT_CFG80211_RX_AUTH;
2280 out_err:
2281 mutex_unlock(&sdata->local->sta_mtx);
2282 /* ignore frame -- wait for timeout */
2283 return RX_MGMT_NONE;
2284}
2285
2286
77fdaa12
JB		 2287static enum rx_mgmt_action __must_check
2288ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
77fdaa12 2289 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2290{
46900298 2291 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 2292 const u8 *bssid = NULL;
f0706e82
JB		 2293 u16 reason_code;
2294
66e67e41
JB		 2295 lockdep_assert_held(&ifmgd->mtx);
2296
f4ea83dd 2297 if (len < 24 + 2)
77fdaa12 2298 return RX_MGMT_NONE;
f0706e82 2299
66e67e41 2300 if (!ifmgd->associated ||
b203ca39 2301 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
66e67e41 2302 return RX_MGMT_NONE;
77fdaa12 2303
0c1ad2ca 2304 bssid = ifmgd->associated->bssid;
f0706e82
JB		 2305
2306 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2307
bdcbd8e0
JB		 2308 sdata_info(sdata, "deauthenticated from %pM (Reason: %u)\n",
2309 bssid, reason_code);
77fdaa12 2310
37ad3888
JB		 2311 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2312
77fdaa12 2313 return RX_MGMT_CFG80211_DEAUTH;
f0706e82
JB		 2314}
2315
2316
77fdaa12
JB		 2317static enum rx_mgmt_action __must_check
2318ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2319 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2320{
46900298 2321 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 2322 u16 reason_code;
2323
66e67e41 2324 lockdep_assert_held(&ifmgd->mtx);
77fdaa12 2325
66e67e41 2326 if (len < 24 + 2)
77fdaa12
JB		 2327 return RX_MGMT_NONE;
2328
66e67e41 2329 if (!ifmgd->associated ||
b203ca39 2330 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
77fdaa12 2331 return RX_MGMT_NONE;
f0706e82
JB		 2332
2333 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2334
bdcbd8e0
JB		 2335 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2336 mgmt->sa, reason_code);
f0706e82 2337
37ad3888
JB		 2338 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2339
77fdaa12 2340 return RX_MGMT_CFG80211_DISASSOC;
f0706e82
JB		 2341}
2342
c74d084f
CL		 2343static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2344 u8 *supp_rates, unsigned int supp_rates_len,
2345 u32 *rates, u32 *basic_rates,
2346 bool *have_higher_than_11mbit,
2347 int *min_rate, int *min_rate_index)
2348{
2349 int i, j;
2350
2351 for (i = 0; i < supp_rates_len; i++) {
2352 int rate = (supp_rates[i] & 0x7f) * 5;
2353 bool is_basic = !!(supp_rates[i] & 0x80);
2354
2355 if (rate > 110)
2356 *have_higher_than_11mbit = true;
2357
2358 /*
2359 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2360 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2361 *
2362 * Note: Even through the membership selector and the basic
2363 * rate flag share the same bit, they are not exactly
2364 * the same.
2365 */
2366 if (!!(supp_rates[i] & 0x80) &&
2367 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2368 continue;
2369
2370 for (j = 0; j < sband->n_bitrates; j++) {
2371 if (sband->bitrates[j].bitrate == rate) {
2372 *rates |= BIT(j);
2373 if (is_basic)
2374 *basic_rates |= BIT(j);
2375 if (rate < *min_rate) {
2376 *min_rate = rate;
2377 *min_rate_index = j;
2378 }
2379 break;
2380 }
2381 }
2382 }
2383}
f0706e82 2384
66e67e41
JB		 2385static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2386 bool assoc)
2387{
2388 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2389
2390 lockdep_assert_held(&sdata->u.mgd.mtx);
2391
66e67e41
JB		 2392 if (!assoc) {
2393 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2394
2395 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2396 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
028e8da0 2397 sdata->u.mgd.flags = 0;
55de908a 2398 ieee80211_vif_release_channel(sdata);
66e67e41
JB		 2399 }
2400
2401 kfree(assoc_data);
2402 sdata->u.mgd.assoc_data = NULL;
2403}
2404
2405static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2406 struct cfg80211_bss *cbss,
af6b6374 2407 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2408{
46900298 2409 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 2410 struct ieee80211_local *local = sdata->local;
8318d78a 2411 struct ieee80211_supported_band *sband;
f0706e82 2412 struct sta_info *sta;
af6b6374 2413 u8 *pos;
af6b6374 2414 u16 capab_info, aid;
f0706e82 2415 struct ieee802_11_elems elems;
bda3933a 2416 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
ae5eb026 2417 u32 changed = 0;
c74d084f 2418 int err;
f0706e82 2419
af6b6374 2420 /* AssocResp and ReassocResp have identical structure */
f0706e82 2421
f0706e82 2422 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 2423 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 2424
1dd84aa2 2425 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
bdcbd8e0
JB		 2426 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2427 aid);
1dd84aa2
JB		 2428 aid &= ~(BIT(15) | BIT(14));
2429
05cb9108
JB		 2430 ifmgd->broken_ap = false;
2431
2432 if (aid == 0 || aid > IEEE80211_MAX_AID) {
bdcbd8e0
JB		 2433 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2434 aid);
05cb9108
JB		 2435 aid = 0;
2436 ifmgd->broken_ap = true;
2437 }
2438
af6b6374
JB		 2439 pos = mgmt->u.assoc_resp.variable;
2440 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2441
f0706e82 2442 if (!elems.supp_rates) {
bdcbd8e0 2443 sdata_info(sdata, "no SuppRates element in AssocResp\n");
af6b6374 2444 return false;
f0706e82
JB		 2445 }
2446
46900298 2447 ifmgd->aid = aid;
f0706e82 2448
30eb1dc2
JB		 2449 /*
2450 * We previously checked these in the beacon/probe response, so
2451 * they should be present here. This is just a safety net.
2452 */
2453 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2454 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2455 sdata_info(sdata,
2456 "HT AP is missing WMM params or HT capability/operation in AssocResp\n");
2457 return false;
2458 }
2459
2460 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2461 (!elems.vht_cap_elem || !elems.vht_operation)) {
2462 sdata_info(sdata,
2463 "VHT AP is missing VHT capability/operation in AssocResp\n");
2464 return false;
2465 }
2466
2a33bee2
GE		 2467 mutex_lock(&sdata->local->sta_mtx);
2468 /*
2469 * station info was already allocated and inserted before
2470 * the association and should be available to us
2471 */
7852e361 2472 sta = sta_info_get(sdata, cbss->bssid);
2a33bee2
GE		 2473 if (WARN_ON(!sta)) {
2474 mutex_unlock(&sdata->local->sta_mtx);
af6b6374 2475 return false;
77fdaa12 2476 }
05e5e883 2477
55de908a 2478 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
f709fc69 2479
30eb1dc2 2480 /* Set up internal HT/VHT capabilities */
a8243b72 2481 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
ef96a842 2482 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
e1a0c6b3 2483 elems.ht_cap_elem, sta);
64f68e5d 2484
818255ea
MP		 2485 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2486 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
4a34215e 2487 elems.vht_cap_elem, sta);
818255ea 2488
30eb1dc2
JB		 2489 /*
2490 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
2491 * in their association response, so ignore that data for our own
2492 * configuration. If it changed since the last beacon, we'll get the
2493 * next beacon and update then.
2494 */
1128958d 2495
bee7f586
JB		 2496 /*
2497 * If an operating mode notification IE is present, override the
2498 * NSS calculation (that would be done in rate_control_rate_init())
2499 * and use the # of streams from that element.
2500 */
2501 if (elems.opmode_notif &&
2502 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
2503 u8 nss;
2504
2505 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
2506 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
2507 nss += 1;
2508 sta->sta.rx_nss = nss;
2509 }
2510
4b7679a5 2511 rate_control_rate_init(sta);
f0706e82 2512
46900298 2513 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
c2c98fde 2514 set_sta_flag(sta, WLAN_STA_MFP);
5394af4d 2515
ddf4ac53 2516 if (elems.wmm_param)
c2c98fde 2517 set_sta_flag(sta, WLAN_STA_WME);
ddf4ac53 2518
3e4d40fa 2519 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
c8987876
JB		 2520 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2521 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2522 if (err) {
bdcbd8e0
JB		 2523 sdata_info(sdata,
2524 "failed to move station %pM to desired state\n",
2525 sta->sta.addr);
c8987876
JB		 2526 WARN_ON(__sta_info_destroy(sta));
2527 mutex_unlock(&sdata->local->sta_mtx);
2528 return false;
2529 }
2530
7852e361 2531 mutex_unlock(&sdata->local->sta_mtx);
ddf4ac53 2532
f2176d72
JO		 2533 /*
2534 * Always handle WMM once after association regardless
2535 * of the first value the AP uses. Setting -1 here has
2536 * that effect because the AP values is an unsigned
2537 * 4-bit value.
2538 */
2539 ifmgd->wmm_last_param_set = -1;
2540
ddf4ac53 2541 if (elems.wmm_param)
4ced3f74 2542 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 2543 elems.wmm_param_len);
aa837e1d 2544 else
3abead59
JB		 2545 ieee80211_set_wmm_default(sdata, false);
2546 changed |= BSS_CHANGED_QOS;
f0706e82 2547
60f8b39c
JB		 2548 /* set AID and assoc capability,
2549 * ieee80211_set_associated() will tell the driver */
2550 bss_conf->aid = aid;
2551 bss_conf->assoc_capability = capab_info;
0c1ad2ca 2552 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 2553
d524215f
FF		 2554 /*
2555 * If we're using 4-addr mode, let the AP know that we're
2556 * doing so, so that it can create the STA VLAN on its side
2557 */
2558 if (ifmgd->use_4addr)
2559 ieee80211_send_4addr_nullfunc(local, sdata);
2560
15b7b062 2561 /*
b291ba11
JB		 2562 * Start timer to probe the connection to the AP now.
2563 * Also start the timer that will detect beacon loss.
15b7b062 2564 */
b291ba11 2565 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 2566 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 2567
af6b6374 2568 return true;
f0706e82
JB		 2569}
2570
66e67e41
JB		 2571static enum rx_mgmt_action __must_check
2572ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2573 struct ieee80211_mgmt *mgmt, size_t len,
2574 struct cfg80211_bss **bss)
2575{
2576 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2577 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2578 u16 capab_info, status_code, aid;
2579 struct ieee802_11_elems elems;
2580 u8 *pos;
2581 bool reassoc;
2582
2583 lockdep_assert_held(&ifmgd->mtx);
2584
2585 if (!assoc_data)
2586 return RX_MGMT_NONE;
b203ca39 2587 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
66e67e41
JB		 2588 return RX_MGMT_NONE;
2589
2590 /*
2591 * AssocResp and ReassocResp have identical structure, so process both
2592 * of them in this function.
2593 */
2594
2595 if (len < 24 + 6)
2596 return RX_MGMT_NONE;
2597
2598 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2599 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2600 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2601 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2602
bdcbd8e0
JB		 2603 sdata_info(sdata,
2604 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2605 reassoc ? "Rea" : "A", mgmt->sa,
2606 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
66e67e41
JB		 2607
2608 pos = mgmt->u.assoc_resp.variable;
2609 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2610
2611 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
2612 elems.timeout_int && elems.timeout_int_len == 5 &&
2613 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
2614 u32 tu, ms;
2615 tu = get_unaligned_le32(elems.timeout_int + 1);
2616 ms = tu * 1024 / 1000;
bdcbd8e0
JB		 2617 sdata_info(sdata,
2618 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2619 mgmt->sa, tu, ms);
66e67e41 2620 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
89afe614 2621 assoc_data->timeout_started = true;
66e67e41
JB		 2622 if (ms > IEEE80211_ASSOC_TIMEOUT)
2623 run_again(ifmgd, assoc_data->timeout);
2624 return RX_MGMT_NONE;
2625 }
2626
2627 *bss = assoc_data->bss;
2628
2629 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2630 sdata_info(sdata, "%pM denied association (code=%d)\n",
2631 mgmt->sa, status_code);
66e67e41
JB		 2632 ieee80211_destroy_assoc_data(sdata, false);
2633 } else {
66e67e41
JB		 2634 if (!ieee80211_assoc_success(sdata, *bss, mgmt, len)) {
2635 /* oops -- internal error -- send timeout for now */
10a9109f 2636 ieee80211_destroy_assoc_data(sdata, false);
5b112d3d 2637 cfg80211_put_bss(sdata->local->hw.wiphy, *bss);
66e67e41
JB		 2638 return RX_MGMT_CFG80211_ASSOC_TIMEOUT;
2639 }
635d999f 2640 sdata_info(sdata, "associated\n");
79ebfb85
JB		 2641
2642 /*
2643 * destroy assoc_data afterwards, as otherwise an idle
2644 * recalc after assoc_data is NULL but before associated
2645 * is set can cause the interface to go idle
2646 */
2647 ieee80211_destroy_assoc_data(sdata, true);
66e67e41
JB		 2648 }
2649
2650 return RX_MGMT_CFG80211_RX_ASSOC;
2651}
8e3c1b77 2652
98c8fccf 2653static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
8e3c1b77 2654 struct ieee80211_mgmt *mgmt, size_t len,
98c8fccf 2655 struct ieee80211_rx_status *rx_status,
d45c4172 2656 struct ieee802_11_elems *elems)
98c8fccf
JB		 2657{
2658 struct ieee80211_local *local = sdata->local;
2659 int freq;
c2b13452 2660 struct ieee80211_bss *bss;
98c8fccf 2661 struct ieee80211_channel *channel;
56007a02
JB		 2662 bool need_ps = false;
2663
826262c3
JB		 2664 if ((sdata->u.mgd.associated &&
2665 ether_addr_equal(mgmt->bssid, sdata->u.mgd.associated->bssid)) ||
2666 (sdata->u.mgd.assoc_data &&
2667 ether_addr_equal(mgmt->bssid,
2668 sdata->u.mgd.assoc_data->bss->bssid))) {
56007a02 2669 /* not previously set so we may need to recalc */
826262c3
JB		 2670 need_ps = sdata->u.mgd.associated && !sdata->u.mgd.dtim_period;
2671
2672 if (elems->tim && !elems->parse_error) {
4a3cb702 2673 const struct ieee80211_tim_ie *tim_ie = elems->tim;
826262c3
JB		 2674 sdata->u.mgd.dtim_period = tim_ie->dtim_period;
2675 }
56007a02 2676 }
98c8fccf
JB		 2677
2678 if (elems->ds_params && elems->ds_params_len == 1)
59eb21a6
BR		 2679 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
2680 rx_status->band);
98c8fccf
JB		 2681 else
2682 freq = rx_status->freq;
2683
2684 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2685
2686 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2687 return;
2688
98c8fccf 2689 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
d45c4172 2690 channel);
77fdaa12
JB		 2691 if (bss)
2692 ieee80211_rx_bss_put(local, bss);
2693
2694 if (!sdata->u.mgd.associated)
98c8fccf
JB		 2695 return;
2696
56007a02
JB		 2697 if (need_ps) {
2698 mutex_lock(&local->iflist_mtx);
2699 ieee80211_recalc_ps(local, -1);
2700 mutex_unlock(&local->iflist_mtx);
2701 }
2702
5bc1420b
JB		 2703 if (elems->ch_switch_ie &&
2704 memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid, ETH_ALEN) == 0)
2705 ieee80211_sta_process_chanswitch(sdata, elems->ch_switch_ie,
5ce6e438 2706 bss, rx_status->mactime);
f0706e82
JB		 2707}
2708
2709
f698d856 2710static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 2711 struct sk_buff *skb)
f0706e82 2712{
af6b6374 2713 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 2714 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 2715 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2716 size_t baselen, len = skb->len;
ae6a44e3
EK		 2717 struct ieee802_11_elems elems;
2718
15b7b062
KV		 2719 ifmgd = &sdata->u.mgd;
2720
77fdaa12
JB		 2721 ASSERT_MGD_MTX(ifmgd);
2722
b203ca39 2723 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
8e7cdbb6
TW		 2724 return; /* ignore ProbeResp to foreign address */
2725
ae6a44e3
EK		 2726 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2727 if (baselen > len)
2728 return;
2729
2730 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2731 &elems);
2732
d45c4172 2733 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
9859b81e 2734
77fdaa12 2735 if (ifmgd->associated &&
b203ca39 2736 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
4e5ff376 2737 ieee80211_reset_ap_probe(sdata);
66e67e41
JB		 2738
2739 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
b203ca39 2740 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
66e67e41 2741 /* got probe response, continue with auth */
bdcbd8e0 2742 sdata_info(sdata, "direct probe responded\n");
66e67e41
JB		 2743 ifmgd->auth_data->tries = 0;
2744 ifmgd->auth_data->timeout = jiffies;
89afe614 2745 ifmgd->auth_data->timeout_started = true;
66e67e41
JB		 2746 run_again(ifmgd, ifmgd->auth_data->timeout);
2747 }
f0706e82
JB		 2748}
2749
d91f36db
JB		 2750/*
2751 * This is the canonical list of information elements we care about,
2752 * the filter code also gives us all changes to the Microsoft OUI
2753 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2754 *
2755 * We implement beacon filtering in software since that means we can
2756 * avoid processing the frame here and in cfg80211, and userspace
2757 * will not be able to tell whether the hardware supports it or not.
2758 *
2759 * XXX: This list needs to be dynamic -- userspace needs to be able to
2760 * add items it requires. It also needs to be able to tell us to
2761 * look out for other vendor IEs.
2762 */
2763static const u64 care_about_ies =
1d4df3a5
JB		 2764 (1ULL << WLAN_EID_COUNTRY) |
2765 (1ULL << WLAN_EID_ERP_INFO) |
2766 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2767 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2768 (1ULL << WLAN_EID_HT_CAPABILITY) |
074d46d1 2769 (1ULL << WLAN_EID_HT_OPERATION);
d91f36db 2770
30eb1dc2
JB		 2771static enum rx_mgmt_action
2772ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
2773 struct ieee80211_mgmt *mgmt, size_t len,
2774 u8 *deauth_buf, struct ieee80211_rx_status *rx_status)
f0706e82 2775{
d91f36db 2776 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 2777 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 2778 size_t baselen;
2779 struct ieee802_11_elems elems;
f698d856 2780 struct ieee80211_local *local = sdata->local;
55de908a
JB		 2781 struct ieee80211_chanctx_conf *chanctx_conf;
2782 struct ieee80211_channel *chan;
bee7f586 2783 struct sta_info *sta;
471b3efd 2784 u32 changed = 0;
f87ad637 2785 bool erp_valid;
7a5158ef 2786 u8 erp_value = 0;
d91f36db 2787 u32 ncrc;
77fdaa12
JB		 2788 u8 *bssid;
2789
66e67e41 2790 lockdep_assert_held(&ifmgd->mtx);
f0706e82 2791
ae6a44e3
EK		 2792 /* Process beacon from the current BSS */
2793 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2794 if (baselen > len)
30eb1dc2 2795 return RX_MGMT_NONE;
ae6a44e3 2796
55de908a
JB		 2797 rcu_read_lock();
2798 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2799 if (!chanctx_conf) {
2800 rcu_read_unlock();
30eb1dc2 2801 return RX_MGMT_NONE;
55de908a
JB		 2802 }
2803
4bf88530 2804 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
55de908a 2805 rcu_read_unlock();
30eb1dc2 2806 return RX_MGMT_NONE;
55de908a 2807 }
4bf88530 2808 chan = chanctx_conf->def.chan;
55de908a 2809 rcu_read_unlock();
f0706e82 2810
c65dd147 2811 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
b203ca39 2812 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
66e67e41
JB		 2813 ieee802_11_parse_elems(mgmt->u.beacon.variable,
2814 len - baselen, &elems);
77fdaa12 2815
d45c4172 2816 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
66e67e41 2817 ifmgd->assoc_data->have_beacon = true;
c65dd147 2818 ifmgd->assoc_data->need_beacon = false;
ef429dad
JB		 2819 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
2820 sdata->vif.bss_conf.sync_tsf =
2821 le64_to_cpu(mgmt->u.beacon.timestamp);
2822 sdata->vif.bss_conf.sync_device_ts =
2823 rx_status->device_timestamp;
2824 if (elems.tim)
2825 sdata->vif.bss_conf.sync_dtim_count =
2826 elems.tim->dtim_count;
2827 else
2828 sdata->vif.bss_conf.sync_dtim_count = 0;
2829 }
66e67e41
JB		 2830 /* continue assoc process */
2831 ifmgd->assoc_data->timeout = jiffies;
89afe614 2832 ifmgd->assoc_data->timeout_started = true;
66e67e41 2833 run_again(ifmgd, ifmgd->assoc_data->timeout);
30eb1dc2 2834 return RX_MGMT_NONE;
66e67e41 2835 }
77fdaa12 2836
66e67e41 2837 if (!ifmgd->associated ||
b203ca39 2838 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
30eb1dc2 2839 return RX_MGMT_NONE;
66e67e41 2840 bssid = ifmgd->associated->bssid;
f0706e82 2841
17e4ec14
JM		 2842 /* Track average RSSI from the Beacon frames of the current AP */
2843 ifmgd->last_beacon_signal = rx_status->signal;
2844 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
2845 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3ba06c6f 2846 ifmgd->ave_beacon_signal = rx_status->signal * 16;
17e4ec14 2847 ifmgd->last_cqm_event_signal = 0;
391a200a 2848 ifmgd->count_beacon_signal = 1;
615f7b9b 2849 ifmgd->last_ave_beacon_signal = 0;
17e4ec14
JM		 2850 } else {
2851 ifmgd->ave_beacon_signal =
2852 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
2853 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
2854 ifmgd->ave_beacon_signal) / 16;
391a200a 2855 ifmgd->count_beacon_signal++;
17e4ec14 2856 }
615f7b9b
MV		 2857
2858 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
2859 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
2860 int sig = ifmgd->ave_beacon_signal;
2861 int last_sig = ifmgd->last_ave_beacon_signal;
2862
2863 /*
2864 * if signal crosses either of the boundaries, invoke callback
2865 * with appropriate parameters
2866 */
2867 if (sig > ifmgd->rssi_max_thold &&
2868 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
2869 ifmgd->last_ave_beacon_signal = sig;
887da917 2870 drv_rssi_callback(local, sdata, RSSI_EVENT_HIGH);
615f7b9b
MV		 2871 } else if (sig < ifmgd->rssi_min_thold &&
2872 (last_sig >= ifmgd->rssi_max_thold ||
2873 last_sig == 0)) {
2874 ifmgd->last_ave_beacon_signal = sig;
887da917 2875 drv_rssi_callback(local, sdata, RSSI_EVENT_LOW);
615f7b9b
MV		 2876 }
2877 }
2878
17e4ec14 2879 if (bss_conf->cqm_rssi_thold &&
391a200a 2880 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
ea086359 2881 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
17e4ec14
JM		 2882 int sig = ifmgd->ave_beacon_signal / 16;
2883 int last_event = ifmgd->last_cqm_event_signal;
2884 int thold = bss_conf->cqm_rssi_thold;
2885 int hyst = bss_conf->cqm_rssi_hyst;
2886 if (sig < thold &&
2887 (last_event == 0 || sig < last_event - hyst)) {
2888 ifmgd->last_cqm_event_signal = sig;
2889 ieee80211_cqm_rssi_notify(
2890 &sdata->vif,
2891 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
2892 GFP_KERNEL);
2893 } else if (sig > thold &&
2894 (last_event == 0 || sig > last_event + hyst)) {
2895 ifmgd->last_cqm_event_signal = sig;
2896 ieee80211_cqm_rssi_notify(
2897 &sdata->vif,
2898 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
2899 GFP_KERNEL);
2900 }
2901 }
2902
b291ba11 2903 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
bdcbd8e0 2904 mlme_dbg_ratelimited(sdata,
112c31f0 2905 "cancelling AP probe due to a received beacon\n");
925e64c3 2906 mutex_lock(&local->mtx);
b291ba11 2907 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
925e64c3
SG		 2908 ieee80211_run_deferred_scan(local);
2909 mutex_unlock(&local->mtx);
2910
4e751843
JB		 2911 mutex_lock(&local->iflist_mtx);
2912 ieee80211_recalc_ps(local, -1);
2913 mutex_unlock(&local->iflist_mtx);
92778180
JM		 2914 }
2915
b291ba11
JB		 2916 /*
2917 * Push the beacon loss detection into the future since
2918 * we are processing a beacon from the AP just now.
2919 */
d3a910a8 2920 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 2921
d91f36db
JB		 2922 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
2923 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
2924 len - baselen, &elems,
2925 care_about_ies, ncrc);
2926
25c9c875 2927 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
f87ad637
RR		 2928 bool directed_tim = ieee80211_check_tim(elems.tim,
2929 elems.tim_len,
2930 ifmgd->aid);
1fb3606b 2931 if (directed_tim) {
572e0012 2932 if (local->hw.conf.dynamic_ps_timeout > 0) {
70b12f26
RW		 2933 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2934 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2935 ieee80211_hw_config(local,
2936 IEEE80211_CONF_CHANGE_PS);
2937 }
572e0012 2938 ieee80211_send_nullfunc(local, sdata, 0);
6f0756a3 2939 } else if (!local->pspolling && sdata->u.mgd.powersave) {
572e0012
KV		 2940 local->pspolling = true;
2941
2942 /*
2943 * Here is assumed that the driver will be
2944 * able to send ps-poll frame and receive a
2945 * response even though power save mode is
2946 * enabled, but some drivers might require
2947 * to disable power save here. This needs
2948 * to be investigated.
2949 */
2950 ieee80211_send_pspoll(local, sdata);
2951 }
a97b77b9
VN		 2952 }
2953 }
7a5158ef 2954
488dd7b5
JB		 2955 if (sdata->vif.p2p) {
2956 u8 noa[2];
2957 int ret;
2958
2959 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
2960 len - baselen,
2961 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
2962 noa, sizeof(noa));
2963 if (ret >= 2 && sdata->u.mgd.p2p_noa_index != noa[0]) {
2964 bss_conf->p2p_oppps = noa[1] & 0x80;
2965 bss_conf->p2p_ctwindow = noa[1] & 0x7f;
2966 changed |= BSS_CHANGED_P2P_PS;
2967 sdata->u.mgd.p2p_noa_index = noa[0];
2968 /*
2969 * make sure we update all information, the CRC
2970 * mechanism doesn't look at P2P attributes.
2971 */
2972 ifmgd->beacon_crc_valid = false;
2973 }
2974 }
2975
d8ec4433 2976 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
30eb1dc2 2977 return RX_MGMT_NONE;
30196673 2978 ifmgd->beacon_crc = ncrc;
d8ec4433 2979 ifmgd->beacon_crc_valid = true;
30196673 2980
d45c4172 2981 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
7d25745d
JB		 2982
2983 if (ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2984 elems.wmm_param_len))
2985 changed |= BSS_CHANGED_QOS;
2986
c65dd147
EG		 2987 /*
2988 * If we haven't had a beacon before, tell the driver about the
ef429dad 2989 * DTIM period (and beacon timing if desired) now.
c65dd147
EG		 2990 */
2991 if (!bss_conf->dtim_period) {
2992 /* a few bogus AP send dtim_period = 0 or no TIM IE */
2993 if (elems.tim)
2994 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
2995 else
2996 bss_conf->dtim_period = 1;
ef429dad
JB		 2997
2998 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
2999 sdata->vif.bss_conf.sync_tsf =
3000 le64_to_cpu(mgmt->u.beacon.timestamp);
3001 sdata->vif.bss_conf.sync_device_ts =
3002 rx_status->device_timestamp;
3003 if (elems.tim)
3004 sdata->vif.bss_conf.sync_dtim_count =
3005 elems.tim->dtim_count;
3006 else
3007 sdata->vif.bss_conf.sync_dtim_count = 0;
3008 }
3009
c65dd147
EG		 3010 changed |= BSS_CHANGED_DTIM_PERIOD;
3011 }
3012
7a5158ef
JB		 3013 if (elems.erp_info && elems.erp_info_len >= 1) {
3014 erp_valid = true;
3015 erp_value = elems.erp_info[0];
3016 } else {
3017 erp_valid = false;
50c4afb9 3018 }
7a5158ef
JB		 3019 changed |= ieee80211_handle_bss_capability(sdata,
3020 le16_to_cpu(mgmt->u.beacon.capab_info),
3021 erp_valid, erp_value);
f0706e82 3022
1128958d 3023 mutex_lock(&local->sta_mtx);
bee7f586
JB		 3024 sta = sta_info_get(sdata, bssid);
3025
30eb1dc2
JB		 3026 if (ieee80211_config_bw(sdata, sta, elems.ht_operation,
3027 elems.vht_operation, bssid, &changed)) {
3028 mutex_unlock(&local->sta_mtx);
3029 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3030 WLAN_REASON_DEAUTH_LEAVING,
3031 true, deauth_buf);
3032 return RX_MGMT_CFG80211_TX_DEAUTH;
3033 }
bee7f586
JB		 3034
3035 if (sta && elems.opmode_notif)
3036 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3037 rx_status->band, true);
1128958d 3038 mutex_unlock(&local->sta_mtx);
d3c990fb 3039
04b7b2ff
JB		 3040 if (elems.country_elem && elems.pwr_constr_elem &&
3041 mgmt->u.probe_resp.capab_info &
3042 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT))
1ea6f9c0
JB		 3043 changed |= ieee80211_handle_pwr_constr(sdata, chan,
3044 elems.country_elem,
3045 elems.country_elem_len,
3046 elems.pwr_constr_elem);
3f2355cb 3047
471b3efd 3048 ieee80211_bss_info_change_notify(sdata, changed);
30eb1dc2
JB		 3049
3050 return RX_MGMT_NONE;
f0706e82
JB		 3051}
3052
1fa57d01
JB		 3053void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3054 struct sk_buff *skb)
f0706e82 3055{
77fdaa12 3056 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 3057 struct ieee80211_rx_status *rx_status;
f0706e82 3058 struct ieee80211_mgmt *mgmt;
66e67e41 3059 struct cfg80211_bss *bss = NULL;
77fdaa12 3060 enum rx_mgmt_action rma = RX_MGMT_NONE;
30eb1dc2 3061 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
f0706e82
JB		 3062 u16 fc;
3063
f0706e82
JB		 3064 rx_status = (struct ieee80211_rx_status *) skb->cb;
3065 mgmt = (struct ieee80211_mgmt *) skb->data;
3066 fc = le16_to_cpu(mgmt->frame_control);
3067
77fdaa12
JB		 3068 mutex_lock(&ifmgd->mtx);
3069
66e67e41
JB		 3070 switch (fc & IEEE80211_FCTL_STYPE) {
3071 case IEEE80211_STYPE_BEACON:
30eb1dc2
JB		 3072 rma = ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
3073 deauth_buf, rx_status);
66e67e41
JB		 3074 break;
3075 case IEEE80211_STYPE_PROBE_RESP:
3076 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3077 break;
3078 case IEEE80211_STYPE_AUTH:
3079 rma = ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3080 break;
3081 case IEEE80211_STYPE_DEAUTH:
3082 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3083 break;
3084 case IEEE80211_STYPE_DISASSOC:
3085 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3086 break;
3087 case IEEE80211_STYPE_ASSOC_RESP:
3088 case IEEE80211_STYPE_REASSOC_RESP:
3089 rma = ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, &bss);
3090 break;
3091 case IEEE80211_STYPE_ACTION:
3092 switch (mgmt->u.action.category) {
3093 case WLAN_CATEGORY_SPECTRUM_MGMT:
3094 ieee80211_sta_process_chanswitch(sdata,
3095 &mgmt->u.action.u.chan_switch.sw_elem,
3096 (void *)ifmgd->associated->priv,
3097 rx_status->mactime);
77fdaa12 3098 break;
77fdaa12 3099 }
77fdaa12 3100 }
77fdaa12
JB		 3101 mutex_unlock(&ifmgd->mtx);
3102
66e67e41
JB		 3103 switch (rma) {
3104 case RX_MGMT_NONE:
3105 /* no action */
3106 break;
3107 case RX_MGMT_CFG80211_DEAUTH:
ce470613 3108 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
66e67e41
JB		 3109 break;
3110 case RX_MGMT_CFG80211_DISASSOC:
3111 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
3112 break;
3113 case RX_MGMT_CFG80211_RX_AUTH:
3114 cfg80211_send_rx_auth(sdata->dev, (u8 *)mgmt, skb->len);
3115 break;
3116 case RX_MGMT_CFG80211_RX_ASSOC:
3117 cfg80211_send_rx_assoc(sdata->dev, bss, (u8 *)mgmt, skb->len);
3118 break;
3119 case RX_MGMT_CFG80211_ASSOC_TIMEOUT:
3120 cfg80211_send_assoc_timeout(sdata->dev, mgmt->bssid);
3121 break;
30eb1dc2
JB		 3122 case RX_MGMT_CFG80211_TX_DEAUTH:
3123 cfg80211_send_deauth(sdata->dev, deauth_buf,
3124 sizeof(deauth_buf));
3125 break;
66e67e41
JB		 3126 default:
3127 WARN(1, "unexpected: %d", rma);
b054b747 3128 }
f0706e82
JB		 3129}
3130
9c6bd790 3131static void ieee80211_sta_timer(unsigned long data)
f0706e82 3132{
60f8b39c
JB		 3133 struct ieee80211_sub_if_data *sdata =
3134 (struct ieee80211_sub_if_data *) data;
5bb644a0 3135
9b7d72c1 3136 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
f0706e82
JB		 3137}
3138
04ac3c0e 3139static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
6b684db1 3140 u8 *bssid, u8 reason, bool tx)
04ac3c0e 3141{
04ac3c0e 3142 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 3143 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
04ac3c0e 3144
37ad3888 3145 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
6b684db1 3146 tx, frame_buf);
04ac3c0e 3147 mutex_unlock(&ifmgd->mtx);
37ad3888 3148
04ac3c0e
FF		 3149 /*
3150 * must be outside lock due to cfg80211,
3151 * but that's not a problem.
3152 */
6ae16775 3153 cfg80211_send_deauth(sdata->dev, frame_buf, IEEE80211_DEAUTH_FRAME_LEN);
fcac4fb0 3154
04ac3c0e
FF		 3155 mutex_lock(&ifmgd->mtx);
3156}
3157
66e67e41
JB		 3158static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
3159{
3160 struct ieee80211_local *local = sdata->local;
3161 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3162 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
1672c0e3 3163 u32 tx_flags = 0;
66e67e41
JB		 3164
3165 lockdep_assert_held(&ifmgd->mtx);
3166
3167 if (WARN_ON_ONCE(!auth_data))
3168 return -EINVAL;
3169
1672c0e3
JB		 3170 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3171 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3172 IEEE80211_TX_INTFL_MLME_CONN_TX;
3173
66e67e41
JB		 3174 auth_data->tries++;
3175
3176 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
bdcbd8e0
JB		 3177 sdata_info(sdata, "authentication with %pM timed out\n",
3178 auth_data->bss->bssid);
66e67e41
JB		 3179
3180 /*
3181 * Most likely AP is not in the range so remove the
3182 * bss struct for that AP.
3183 */
3184 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3185
3186 return -ETIMEDOUT;
3187 }
3188
a1845fc7
JB		 3189 drv_mgd_prepare_tx(local, sdata);
3190
66e67e41 3191 if (auth_data->bss->proberesp_ies) {
6b8ece3a
JM		 3192 u16 trans = 1;
3193 u16 status = 0;
3194
bdcbd8e0
JB		 3195 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3196 auth_data->bss->bssid, auth_data->tries,
3197 IEEE80211_AUTH_MAX_TRIES);
66e67e41
JB		 3198
3199 auth_data->expected_transaction = 2;
6b8ece3a
JM		 3200
3201 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3202 trans = auth_data->sae_trans;
3203 status = auth_data->sae_status;
3204 auth_data->expected_transaction = trans;
3205 }
3206
3207 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3208 auth_data->data, auth_data->data_len,
66e67e41 3209 auth_data->bss->bssid,
1672c0e3
JB		 3210 auth_data->bss->bssid, NULL, 0, 0,
3211 tx_flags);
66e67e41
JB		 3212 } else {
3213 const u8 *ssidie;
3214
bdcbd8e0
JB		 3215 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
3216 auth_data->bss->bssid, auth_data->tries,
3217 IEEE80211_AUTH_MAX_TRIES);
66e67e41 3218
9caf0364 3219 rcu_read_lock();
66e67e41 3220 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
9caf0364
JB		 3221 if (!ssidie) {
3222 rcu_read_unlock();
66e67e41 3223 return -EINVAL;
9caf0364 3224 }
66e67e41
JB		 3225 /*
3226 * Direct probe is sent to broadcast address as some APs
3227 * will not answer to direct packet in unassociated state.
3228 */
3229 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
1672c0e3 3230 NULL, 0, (u32) -1, true, tx_flags,
55de908a 3231 auth_data->bss->channel, false);
9caf0364 3232 rcu_read_unlock();
66e67e41
JB		 3233 }
3234
1672c0e3
JB		 3235 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
3236 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
89afe614 3237 ifmgd->auth_data->timeout_started = true;
1672c0e3 3238 run_again(ifmgd, auth_data->timeout);
89afe614
JB		 3239 } else {
3240 auth_data->timeout_started = false;
1672c0e3 3241 }
66e67e41
JB		 3242
3243 return 0;
3244}
3245
3246static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3247{
3248 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3249 struct ieee80211_local *local = sdata->local;
3250
3251 lockdep_assert_held(&sdata->u.mgd.mtx);
3252
66e67e41
JB		 3253 assoc_data->tries++;
3254 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
bdcbd8e0
JB		 3255 sdata_info(sdata, "association with %pM timed out\n",
3256 assoc_data->bss->bssid);
66e67e41
JB		 3257
3258 /*
3259 * Most likely AP is not in the range so remove the
3260 * bss struct for that AP.
3261 */
3262 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3263
3264 return -ETIMEDOUT;
3265 }
3266
bdcbd8e0
JB		 3267 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3268 assoc_data->bss->bssid, assoc_data->tries,
3269 IEEE80211_ASSOC_MAX_TRIES);
66e67e41
JB		 3270 ieee80211_send_assoc(sdata);
3271
1672c0e3
JB		 3272 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
3273 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
89afe614 3274 assoc_data->timeout_started = true;
1672c0e3 3275 run_again(&sdata->u.mgd, assoc_data->timeout);
89afe614
JB		 3276 } else {
3277 assoc_data->timeout_started = false;
1672c0e3 3278 }
66e67e41
JB		 3279
3280 return 0;
3281}
3282
1672c0e3
JB		 3283void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3284 __le16 fc, bool acked)
3285{
3286 struct ieee80211_local *local = sdata->local;
3287
3288 sdata->u.mgd.status_fc = fc;
3289 sdata->u.mgd.status_acked = acked;
3290 sdata->u.mgd.status_received = true;
3291
3292 ieee80211_queue_work(&local->hw, &sdata->work);
3293}
3294
1fa57d01 3295void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 3296{
9c6bd790 3297 struct ieee80211_local *local = sdata->local;
1fa57d01 3298 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 3299
77fdaa12
JB		 3300 mutex_lock(&ifmgd->mtx);
3301
1672c0e3
JB		 3302 if (ifmgd->status_received) {
3303 __le16 fc = ifmgd->status_fc;
3304 bool status_acked = ifmgd->status_acked;
3305
3306 ifmgd->status_received = false;
3307 if (ifmgd->auth_data &&
3308 (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) {
3309 if (status_acked) {
3310 ifmgd->auth_data->timeout =
3311 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3312 run_again(ifmgd, ifmgd->auth_data->timeout);
3313 } else {
3314 ifmgd->auth_data->timeout = jiffies - 1;
3315 }
89afe614 3316 ifmgd->auth_data->timeout_started = true;
1672c0e3
JB		 3317 } else if (ifmgd->assoc_data &&
3318 (ieee80211_is_assoc_req(fc) ||
3319 ieee80211_is_reassoc_req(fc))) {
3320 if (status_acked) {
3321 ifmgd->assoc_data->timeout =
3322 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3323 run_again(ifmgd, ifmgd->assoc_data->timeout);
3324 } else {
3325 ifmgd->assoc_data->timeout = jiffies - 1;
3326 }
89afe614 3327 ifmgd->assoc_data->timeout_started = true;
1672c0e3
JB		 3328 }
3329 }
3330
89afe614 3331 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
66e67e41
JB		 3332 time_after(jiffies, ifmgd->auth_data->timeout)) {
3333 if (ifmgd->auth_data->done) {
3334 /*
3335 * ok ... we waited for assoc but userspace didn't,
3336 * so let's just kill the auth data
3337 */
3338 ieee80211_destroy_auth_data(sdata, false);
3339 } else if (ieee80211_probe_auth(sdata)) {
3340 u8 bssid[ETH_ALEN];
3341
3342 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3343
3344 ieee80211_destroy_auth_data(sdata, false);
3345
3346 mutex_unlock(&ifmgd->mtx);
3347 cfg80211_send_auth_timeout(sdata->dev, bssid);
3348 mutex_lock(&ifmgd->mtx);
3349 }
89afe614 3350 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
66e67e41
JB		 3351 run_again(ifmgd, ifmgd->auth_data->timeout);
3352
89afe614 3353 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
66e67e41 3354 time_after(jiffies, ifmgd->assoc_data->timeout)) {
c65dd147
EG		 3355 if ((ifmgd->assoc_data->need_beacon &&
3356 !ifmgd->assoc_data->have_beacon) ||
66e67e41
JB		 3357 ieee80211_do_assoc(sdata)) {
3358 u8 bssid[ETH_ALEN];
3359
3360 memcpy(bssid, ifmgd->assoc_data->bss->bssid, ETH_ALEN);
3361
3362 ieee80211_destroy_assoc_data(sdata, false);
3363
3364 mutex_unlock(&ifmgd->mtx);
3365 cfg80211_send_assoc_timeout(sdata->dev, bssid);
3366 mutex_lock(&ifmgd->mtx);
3367 }
89afe614 3368 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
66e67e41
JB		 3369 run_again(ifmgd, ifmgd->assoc_data->timeout);
3370
b291ba11
JB		 3371 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
3372 IEEE80211_STA_CONNECTION_POLL) &&
3373 ifmgd->associated) {
a43abf29 3374 u8 bssid[ETH_ALEN];
72a8a3ed 3375 int max_tries;
a43abf29 3376
0c1ad2ca 3377 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 3378
72a8a3ed 3379 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
180205bd 3380 max_tries = max_nullfunc_tries;
72a8a3ed 3381 else
180205bd 3382 max_tries = max_probe_tries;
72a8a3ed 3383
4e5ff376
FF		 3384 /* ACK received for nullfunc probing frame */
3385 if (!ifmgd->probe_send_count)
3386 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 3387 else if (ifmgd->nullfunc_failed) {
3388 if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3389 mlme_dbg(sdata,
3390 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3391 bssid, ifmgd->probe_send_count,
3392 max_tries);
04ac3c0e
FF		 3393 ieee80211_mgd_probe_ap_send(sdata);
3394 } else {
bdcbd8e0
JB		 3395 mlme_dbg(sdata,
3396 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3397 bssid);
95acac61 3398 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1
JB		 3399 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3400 false);
04ac3c0e
FF		 3401 }
3402 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
b291ba11 3403 run_again(ifmgd, ifmgd->probe_timeout);
04ac3c0e 3404 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
bdcbd8e0
JB		 3405 mlme_dbg(sdata,
3406 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3407 bssid, probe_wait_ms);
95acac61 3408 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 3409 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
04ac3c0e 3410 } else if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3411 mlme_dbg(sdata,
3412 "No probe response from AP %pM after %dms, try %d/%i\n",
3413 bssid, probe_wait_ms,
3414 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 3415 ieee80211_mgd_probe_ap_send(sdata);
3416 } else {
b291ba11
JB		 3417 /*
3418 * We actually lost the connection ... or did we?
3419 * Let's make sure!
3420 */
b38afa87
BG		 3421 wiphy_debug(local->hw.wiphy,
3422 "%s: No probe response from AP %pM"
3423 " after %dms, disconnecting.\n",
3424 sdata->name,
180205bd 3425 bssid, probe_wait_ms);
04ac3c0e 3426
95acac61 3427 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 3428 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
b291ba11
JB		 3429 }
3430 }
3431
77fdaa12 3432 mutex_unlock(&ifmgd->mtx);
f0706e82
JB		 3433}
3434
b291ba11
JB		 3435static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3436{
3437 struct ieee80211_sub_if_data *sdata =
3438 (struct ieee80211_sub_if_data *) data;
3439 struct ieee80211_local *local = sdata->local;
3440
3441 if (local->quiescing)
3442 return;
3443
682bd38b 3444 sdata->u.mgd.connection_loss = false;
1e4dcd01
JO		 3445 ieee80211_queue_work(&sdata->local->hw,
3446 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 3447}
3448
3449static void ieee80211_sta_conn_mon_timer(unsigned long data)
3450{
3451 struct ieee80211_sub_if_data *sdata =
3452 (struct ieee80211_sub_if_data *) data;
3453 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3454 struct ieee80211_local *local = sdata->local;
3455
3456 if (local->quiescing)
3457 return;
3458
42935eca 3459 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 3460}
3461
3462static void ieee80211_sta_monitor_work(struct work_struct *work)
3463{
3464 struct ieee80211_sub_if_data *sdata =
3465 container_of(work, struct ieee80211_sub_if_data,
3466 u.mgd.monitor_work);
3467
3468 ieee80211_mgd_probe_ap(sdata, false);
3469}
3470
9c6bd790
JB		 3471static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3472{
494f1fe5
EP		 3473 u32 flags;
3474
ad935687 3475 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
925e64c3 3476 __ieee80211_stop_poll(sdata);
ad935687 3477
b291ba11 3478 /* let's probe the connection once */
494f1fe5
EP		 3479 flags = sdata->local->hw.flags;
3480 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3481 ieee80211_queue_work(&sdata->local->hw,
3482 &sdata->u.mgd.monitor_work);
b291ba11 3483 /* and do all the other regular work too */
64592c8f 3484 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 3485 }
9c6bd790 3486}
f0706e82 3487
9c6bd790
JB		 3488/* interface setup */
3489void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 3490{
46900298 3491 struct ieee80211_if_managed *ifmgd;
988c0f72 3492
46900298 3493 ifmgd = &sdata->u.mgd;
b291ba11 3494 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 3495 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 3496 INIT_WORK(&ifmgd->beacon_connection_loss_work,
3497 ieee80211_beacon_connection_loss_work);
882a7c69
JB		 3498 INIT_WORK(&ifmgd->csa_connection_drop_work,
3499 ieee80211_csa_connection_drop_work);
d1f5b7a3 3500 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
46900298 3501 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 3502 (unsigned long) sdata);
b291ba11
JB		 3503 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
3504 (unsigned long) sdata);
3505 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
3506 (unsigned long) sdata);
46900298 3507 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 3508 (unsigned long) sdata);
9c6bd790 3509
ab1faead 3510 ifmgd->flags = 0;
1478acb3 3511 ifmgd->powersave = sdata->wdev.ps;
dc41e4d4
EP		 3512 ifmgd->uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
3513 ifmgd->uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
bbbdff9e 3514
77fdaa12 3515 mutex_init(&ifmgd->mtx);
0f78231b
JB		 3516
3517 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
3518 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
3519 else
3520 ifmgd->req_smps = IEEE80211_SMPS_OFF;
f0706e82
JB		 3521}
3522
77fdaa12
JB		 3523/* scan finished notification */
3524void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 3525{
31ee67a1 3526 struct ieee80211_sub_if_data *sdata;
60f8b39c 3527
77fdaa12
JB		 3528 /* Restart STA timers */
3529 rcu_read_lock();
3530 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3531 ieee80211_restart_sta_timer(sdata);
3532 rcu_read_unlock();
3533}
60f8b39c 3534
77fdaa12
JB		 3535int ieee80211_max_network_latency(struct notifier_block *nb,
3536 unsigned long data, void *dummy)
3537{
3538 s32 latency_usec = (s32) data;
3539 struct ieee80211_local *local =
3540 container_of(nb, struct ieee80211_local,
3541 network_latency_notifier);
1fa6f4af 3542
77fdaa12
JB		 3543 mutex_lock(&local->iflist_mtx);
3544 ieee80211_recalc_ps(local, latency_usec);
3545 mutex_unlock(&local->iflist_mtx);
dfe67012 3546
77fdaa12 3547 return 0;
9c6bd790
JB		 3548}
3549
f2d9d270
JB		 3550static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
3551 struct cfg80211_bss *cbss)
3552{
3553 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3554 const u8 *ht_cap_ie, *vht_cap_ie;
3555 const struct ieee80211_ht_cap *ht_cap;
3556 const struct ieee80211_vht_cap *vht_cap;
3557 u8 chains = 1;
3558
3559 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
3560 return chains;
3561
9caf0364 3562 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
f2d9d270
JB		 3563 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
3564 ht_cap = (void *)(ht_cap_ie + 2);
3565 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
3566 /*
3567 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
3568 * "Tx Unequal Modulation Supported" fields.
3569 */
3570 }
3571
3572 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
3573 return chains;
3574
9caf0364 3575 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
f2d9d270
JB		 3576 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
3577 u8 nss;
3578 u16 tx_mcs_map;
3579
3580 vht_cap = (void *)(vht_cap_ie + 2);
3581 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
3582 for (nss = 8; nss > 0; nss--) {
3583 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
3584 IEEE80211_VHT_MCS_NOT_SUPPORTED)
3585 break;
3586 }
3587 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
3588 chains = max(chains, nss);
3589 }
3590
3591 return chains;
3592}
3593
b17166a7
JB		 3594static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
3595 struct cfg80211_bss *cbss)
a1cf775d
JB		 3596{
3597 struct ieee80211_local *local = sdata->local;
3598 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
24398e39 3599 const struct ieee80211_ht_operation *ht_oper = NULL;
f2d9d270 3600 const struct ieee80211_vht_operation *vht_oper = NULL;
24398e39 3601 struct ieee80211_supported_band *sband;
4bf88530 3602 struct cfg80211_chan_def chandef;
f2d9d270 3603 int ret;
a1cf775d 3604
24398e39
JB		 3605 sband = local->hw.wiphy->bands[cbss->channel->band];
3606
f2d9d270
JB		 3607 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
3608 IEEE80211_STA_DISABLE_80P80MHZ |
3609 IEEE80211_STA_DISABLE_160MHZ);
3610
9caf0364
JB		 3611 rcu_read_lock();
3612
f2d9d270
JB		 3613 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3614 sband->ht_cap.ht_supported) {
08e6effa 3615 const u8 *ht_oper_ie, *ht_cap;
24398e39 3616
9caf0364 3617 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
24398e39
JB		 3618 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3619 ht_oper = (void *)(ht_oper_ie + 2);
08e6effa
JB		 3620
3621 ht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
3622 if (!ht_cap || ht_cap[1] < sizeof(struct ieee80211_ht_cap)) {
3623 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3624 ht_oper = NULL;
3625 }
24398e39
JB		 3626 }
3627
f2d9d270
JB		 3628 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3629 sband->vht_cap.vht_supported) {
08e6effa 3630 const u8 *vht_oper_ie, *vht_cap;
f2d9d270 3631
9caf0364
JB		 3632 vht_oper_ie = ieee80211_bss_get_ie(cbss,
3633 WLAN_EID_VHT_OPERATION);
f2d9d270
JB		 3634 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
3635 vht_oper = (void *)(vht_oper_ie + 2);
3636 if (vht_oper && !ht_oper) {
3637 vht_oper = NULL;
bdcbd8e0 3638 sdata_info(sdata,
f2d9d270 3639 "AP advertised VHT without HT, disabling both\n");
cb145022
JB		 3640 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3641 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
24398e39 3642 }
08e6effa
JB		 3643
3644 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
3645 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
3646 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3647 vht_oper = NULL;
3648 }
24398e39
JB		 3649 }
3650
f2d9d270
JB		 3651 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
3652 cbss->channel,
3653 ht_oper, vht_oper,
30eb1dc2 3654 &chandef, true);
04ecd257 3655
f2d9d270
JB		 3656 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
3657 local->rx_chains);
24398e39 3658
9caf0364
JB		 3659 rcu_read_unlock();
3660
04ecd257
JB		 3661 /* will change later if needed */
3662 sdata->smps_mode = IEEE80211_SMPS_OFF;
3663
f2d9d270
JB		 3664 /*
3665 * If this fails (possibly due to channel context sharing
3666 * on incompatible channels, e.g. 80+80 and 160 sharing the
3667 * same control channel) try to use a smaller bandwidth.
3668 */
3669 ret = ieee80211_vif_use_channel(sdata, &chandef,
3670 IEEE80211_CHANCTX_SHARED);
d601cd8d 3671 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
f2d9d270 3672 ifmgd->flags |= chandef_downgrade(&chandef);
d601cd8d
JB		 3673 ret = ieee80211_vif_use_channel(sdata, &chandef,
3674 IEEE80211_CHANCTX_SHARED);
3675 }
f2d9d270 3676 return ret;
b17166a7
JB		 3677}
3678
3679static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
3680 struct cfg80211_bss *cbss, bool assoc)
3681{
3682 struct ieee80211_local *local = sdata->local;
3683 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3684 struct ieee80211_bss *bss = (void *)cbss->priv;
3685 struct sta_info *new_sta = NULL;
3686 bool have_sta = false;
3687 int err;
3688
3689 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3690 return -EINVAL;
3691
3692 if (assoc) {
3693 rcu_read_lock();
3694 have_sta = sta_info_get(sdata, cbss->bssid);
3695 rcu_read_unlock();
3696 }
3697
3698 if (!have_sta) {
3699 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
3700 if (!new_sta)
3701 return -ENOMEM;
3702 }
3703
13e0c8e3 3704 if (new_sta) {
5d6a1b06
JB		 3705 u32 rates = 0, basic_rates = 0;
3706 bool have_higher_than_11mbit;
3707 int min_rate = INT_MAX, min_rate_index = -1;
b17166a7 3708 struct ieee80211_supported_band *sband;
8cef2c9d 3709 const struct cfg80211_bss_ies *ies;
b17166a7
JB		 3710
3711 sband = local->hw.wiphy->bands[cbss->channel->band];
3712
3713 err = ieee80211_prep_channel(sdata, cbss);
3714 if (err) {
3715 sta_info_free(local, new_sta);
3716 return err;
3717 }
5d6a1b06 3718
5d6a1b06
JB		 3719 ieee80211_get_rates(sband, bss->supp_rates,
3720 bss->supp_rates_len,
3721 &rates, &basic_rates,
3722 &have_higher_than_11mbit,
3723 &min_rate, &min_rate_index);
3724
3725 /*
3726 * This used to be a workaround for basic rates missing
3727 * in the association response frame. Now that we no
3728 * longer use the basic rates from there, it probably
3729 * doesn't happen any more, but keep the workaround so
3730 * in case some *other* APs are buggy in different ways
3731 * we can connect -- with a warning.
3732 */
3733 if (!basic_rates && min_rate_index >= 0) {
bdcbd8e0
JB		 3734 sdata_info(sdata,
3735 "No basic rates, using min rate instead\n");
5d6a1b06
JB		 3736 basic_rates = BIT(min_rate_index);
3737 }
3738
13e0c8e3 3739 new_sta->sta.supp_rates[cbss->channel->band] = rates;
5d6a1b06
JB		 3740 sdata->vif.bss_conf.basic_rates = basic_rates;
3741
3742 /* cf. IEEE 802.11 9.2.12 */
55de908a 3743 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
5d6a1b06
JB		 3744 have_higher_than_11mbit)
3745 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3746 else
3747 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
3748
3749 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
3750
8c358bcd
JB		 3751 /* set timing information */
3752 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
8cef2c9d 3753 rcu_read_lock();
ef429dad
JB		 3754 ies = rcu_dereference(cbss->beacon_ies);
3755 if (ies) {
3756 const u8 *tim_ie;
3757
3758 sdata->vif.bss_conf.sync_tsf = ies->tsf;
3759 sdata->vif.bss_conf.sync_device_ts =
3760 bss->device_ts_beacon;
3761 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
3762 ies->data, ies->len);
3763 if (tim_ie && tim_ie[1] >= 2)
3764 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
3765 else
3766 sdata->vif.bss_conf.sync_dtim_count = 0;
3767 } else if (!(local->hw.flags &
3768 IEEE80211_HW_TIMING_BEACON_ONLY)) {
3769 ies = rcu_dereference(cbss->proberesp_ies);
3770 /* must be non-NULL since beacon IEs were NULL */
3771 sdata->vif.bss_conf.sync_tsf = ies->tsf;
3772 sdata->vif.bss_conf.sync_device_ts =
3773 bss->device_ts_presp;
3774 sdata->vif.bss_conf.sync_dtim_count = 0;
3775 } else {
3776 sdata->vif.bss_conf.sync_tsf = 0;
3777 sdata->vif.bss_conf.sync_device_ts = 0;
3778 sdata->vif.bss_conf.sync_dtim_count = 0;
3779 }
8cef2c9d 3780 rcu_read_unlock();
8c358bcd
JB		 3781
3782 /* tell driver about BSSID, basic rates and timing */
5d6a1b06 3783 ieee80211_bss_info_change_notify(sdata,
8c358bcd
JB		 3784 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
3785 BSS_CHANGED_BEACON_INT);
a1cf775d
JB		 3786
3787 if (assoc)
13e0c8e3 3788 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
a1cf775d 3789
13e0c8e3
JB		 3790 err = sta_info_insert(new_sta);
3791 new_sta = NULL;
a1cf775d 3792 if (err) {
bdcbd8e0
JB		 3793 sdata_info(sdata,
3794 "failed to insert STA entry for the AP (error %d)\n",
3795 err);
a1cf775d
JB		 3796 return err;
3797 }
3798 } else
b203ca39 3799 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
a1cf775d
JB		 3800
3801 return 0;
3802}
3803
77fdaa12
JB		 3804/* config hooks */
3805int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
3806 struct cfg80211_auth_request *req)
9c6bd790 3807{
66e67e41
JB		 3808 struct ieee80211_local *local = sdata->local;
3809 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3810 struct ieee80211_mgd_auth_data *auth_data;
77fdaa12 3811 u16 auth_alg;
66e67e41
JB		 3812 int err;
3813
3814 /* prepare auth data structure */
9c6bd790 3815
77fdaa12
JB		 3816 switch (req->auth_type) {
3817 case NL80211_AUTHTYPE_OPEN_SYSTEM:
3818 auth_alg = WLAN_AUTH_OPEN;
3819 break;
3820 case NL80211_AUTHTYPE_SHARED_KEY:
66e67e41 3821 if (IS_ERR(local->wep_tx_tfm))
9dca9c49 3822 return -EOPNOTSUPP;
77fdaa12
JB		 3823 auth_alg = WLAN_AUTH_SHARED_KEY;
3824 break;
3825 case NL80211_AUTHTYPE_FT:
3826 auth_alg = WLAN_AUTH_FT;
3827 break;
3828 case NL80211_AUTHTYPE_NETWORK_EAP:
3829 auth_alg = WLAN_AUTH_LEAP;
3830 break;
6b8ece3a
JM		 3831 case NL80211_AUTHTYPE_SAE:
3832 auth_alg = WLAN_AUTH_SAE;
3833 break;
77fdaa12
JB		 3834 default:
3835 return -EOPNOTSUPP;
60f8b39c 3836 }
77fdaa12 3837
6b8ece3a
JM		 3838 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
3839 req->ie_len, GFP_KERNEL);
66e67e41 3840 if (!auth_data)
9c6bd790 3841 return -ENOMEM;
77fdaa12 3842
66e67e41 3843 auth_data->bss = req->bss;
77fdaa12 3844
6b8ece3a
JM		 3845 if (req->sae_data_len >= 4) {
3846 __le16 *pos = (__le16 *) req->sae_data;
3847 auth_data->sae_trans = le16_to_cpu(pos[0]);
3848 auth_data->sae_status = le16_to_cpu(pos[1]);
3849 memcpy(auth_data->data, req->sae_data + 4,
3850 req->sae_data_len - 4);
3851 auth_data->data_len += req->sae_data_len - 4;
3852 }
3853
77fdaa12 3854 if (req->ie && req->ie_len) {
6b8ece3a
JM		 3855 memcpy(&auth_data->data[auth_data->data_len],
3856 req->ie, req->ie_len);
3857 auth_data->data_len += req->ie_len;
9c6bd790 3858 }
77fdaa12 3859
fffd0934 3860 if (req->key && req->key_len) {
66e67e41
JB		 3861 auth_data->key_len = req->key_len;
3862 auth_data->key_idx = req->key_idx;
3863 memcpy(auth_data->key, req->key, req->key_len);
fffd0934
JB		 3864 }
3865
66e67e41 3866 auth_data->algorithm = auth_alg;
60f8b39c 3867
66e67e41 3868 /* try to authenticate/probe */
2a33bee2 3869
66e67e41 3870 mutex_lock(&ifmgd->mtx);
2a33bee2 3871
66e67e41
JB		 3872 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
3873 ifmgd->assoc_data) {
3874 err = -EBUSY;
3875 goto err_free;
2a33bee2
GE		 3876 }
3877
66e67e41
JB		 3878 if (ifmgd->auth_data)
3879 ieee80211_destroy_auth_data(sdata, false);
2a33bee2 3880
66e67e41
JB		 3881 /* prep auth_data so we don't go into idle on disassoc */
3882 ifmgd->auth_data = auth_data;
af6b6374 3883
66e67e41 3884 if (ifmgd->associated)
37ad3888 3885 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
af6b6374 3886
bdcbd8e0 3887 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
e5b900d2 3888
a1cf775d
JB		 3889 err = ieee80211_prep_connection(sdata, req->bss, false);
3890 if (err)
66e67e41 3891 goto err_clear;
af6b6374 3892
66e67e41
JB		 3893 err = ieee80211_probe_auth(sdata);
3894 if (err) {
66e67e41
JB		 3895 sta_info_destroy_addr(sdata, req->bss->bssid);
3896 goto err_clear;
3897 }
3898
3899 /* hold our own reference */
5b112d3d 3900 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
66e67e41
JB		 3901 err = 0;
3902 goto out_unlock;
3903
3904 err_clear:
3d2abdfd
EP		 3905 memset(ifmgd->bssid, 0, ETH_ALEN);
3906 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 3907 ifmgd->auth_data = NULL;
3908 err_free:
3909 kfree(auth_data);
3910 out_unlock:
3911 mutex_unlock(&ifmgd->mtx);
b2abb6e2 3912
66e67e41 3913 return err;
af6b6374
JB		 3914}
3915
77fdaa12
JB		 3916int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
3917 struct cfg80211_assoc_request *req)
f0706e82 3918{
66e67e41 3919 struct ieee80211_local *local = sdata->local;
77fdaa12 3920 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 3921 struct ieee80211_bss *bss = (void *)req->bss->priv;
66e67e41 3922 struct ieee80211_mgd_assoc_data *assoc_data;
c65dd147 3923 const struct cfg80211_bss_ies *beacon_ies;
4e74bfdb 3924 struct ieee80211_supported_band *sband;
b08fbbd8 3925 const u8 *ssidie, *ht_ie, *vht_ie;
2a33bee2 3926 int i, err;
f0706e82 3927
66e67e41
JB		 3928 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
3929 if (!assoc_data)
3930 return -ENOMEM;
3931
9caf0364
JB		 3932 rcu_read_lock();
3933 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
3934 if (!ssidie) {
3935 rcu_read_unlock();
3936 kfree(assoc_data);
3937 return -EINVAL;
3938 }
3939 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
3940 assoc_data->ssid_len = ssidie[1];
3941 rcu_read_unlock();
3942
77fdaa12 3943 mutex_lock(&ifmgd->mtx);
9c87ba67 3944
66e67e41 3945 if (ifmgd->associated)
37ad3888 3946 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
66e67e41
JB		 3947
3948 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
3949 err = -EBUSY;
3950 goto err_free;
af6b6374 3951 }
77fdaa12 3952
66e67e41
JB		 3953 if (ifmgd->assoc_data) {
3954 err = -EBUSY;
3955 goto err_free;
3956 }
77fdaa12 3957
66e67e41
JB		 3958 if (ifmgd->auth_data) {
3959 bool match;
3960
3961 /* keep sta info, bssid if matching */
b203ca39 3962 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
66e67e41 3963 ieee80211_destroy_auth_data(sdata, match);
2a33bee2
GE		 3964 }
3965
66e67e41 3966 /* prepare assoc data */
19c3b830 3967
d8ec4433
JO		 3968 ifmgd->beacon_crc_valid = false;
3969
de5036aa
JB		 3970 /*
3971 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
3972 * We still associate in non-HT mode (11a/b/g) if any one of these
3973 * ciphers is configured as pairwise.
3974 * We can set this to true for non-11n hardware, that'll be checked
3975 * separately along with the peer capabilities.
3976 */
1c4cb928 3977 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
77fdaa12
JB		 3978 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
3979 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
1c4cb928 3980 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
a8243b72 3981 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
d545daba 3982 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
1c4cb928 3983 netdev_info(sdata->dev,
d545daba 3984 "disabling HT/VHT due to WEP/TKIP use\n");
1c4cb928
JB		 3985 }
3986 }
77fdaa12 3987
d545daba 3988 if (req->flags & ASSOC_REQ_DISABLE_HT) {
a8243b72 3989 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
d545daba
MP		 3990 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3991 }
ef96a842 3992
dd5ecfea
JB		 3993 if (req->flags & ASSOC_REQ_DISABLE_VHT)
3994 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3995
4e74bfdb
JB		 3996 /* Also disable HT if we don't support it or the AP doesn't use WMM */
3997 sband = local->hw.wiphy->bands[req->bss->channel->band];
3998 if (!sband->ht_cap.ht_supported ||
1c4cb928 3999 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
a8243b72 4000 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
1b49de26
JB		 4001 if (!bss->wmm_used)
4002 netdev_info(sdata->dev,
4003 "disabling HT as WMM/QoS is not supported by the AP\n");
1c4cb928 4004 }
4e74bfdb 4005
d545daba
MP		 4006 /* disable VHT if we don't support it or the AP doesn't use WMM */
4007 if (!sband->vht_cap.vht_supported ||
4008 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
4009 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
1b49de26
JB		 4010 if (!bss->wmm_used)
4011 netdev_info(sdata->dev,
4012 "disabling VHT as WMM/QoS is not supported by the AP\n");
d545daba
MP		 4013 }
4014
ef96a842
BG		 4015 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4016 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4017 sizeof(ifmgd->ht_capa_mask));
4018
dd5ecfea
JB		 4019 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4020 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4021 sizeof(ifmgd->vht_capa_mask));
4022
77fdaa12 4023 if (req->ie && req->ie_len) {
66e67e41
JB		 4024 memcpy(assoc_data->ie, req->ie, req->ie_len);
4025 assoc_data->ie_len = req->ie_len;
4026 }
f679f65d 4027
66e67e41 4028 assoc_data->bss = req->bss;
f679f65d 4029
af6b6374
JB		 4030 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4031 if (ifmgd->powersave)
04ecd257 4032 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
af6b6374 4033 else
04ecd257 4034 sdata->smps_mode = IEEE80211_SMPS_OFF;
af6b6374 4035 } else
04ecd257 4036 sdata->smps_mode = ifmgd->req_smps;
af6b6374 4037
66e67e41 4038 assoc_data->capability = req->bss->capability;
32c5057b
JB		 4039 assoc_data->wmm = bss->wmm_used &&
4040 (local->hw.queues >= IEEE80211_NUM_ACS);
66e67e41
JB		 4041 assoc_data->supp_rates = bss->supp_rates;
4042 assoc_data->supp_rates_len = bss->supp_rates_len;
9dde6423 4043
9caf0364 4044 rcu_read_lock();
9dde6423
JB		 4045 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4046 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4047 assoc_data->ap_ht_param =
4048 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4049 else
a8243b72 4050 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
b08fbbd8
JB		 4051 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4052 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4053 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4054 sizeof(struct ieee80211_vht_cap));
4055 else
4056 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
9caf0364 4057 rcu_read_unlock();
63f170e0 4058
ab13315a
KV		 4059 if (bss->wmm_used && bss->uapsd_supported &&
4060 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
76f0303d 4061 assoc_data->uapsd = true;
ab13315a
KV		 4062 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4063 } else {
76f0303d 4064 assoc_data->uapsd = false;
ab13315a
KV		 4065 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4066 }
4067
77fdaa12 4068 if (req->prev_bssid)
66e67e41 4069 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12
JB		 4070
4071 if (req->use_mfp) {
4072 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4073 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4074 } else {
4075 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4076 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4077 }
4078
4079 if (req->crypto.control_port)
4080 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4081 else
4082 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4083
a621fa4d
JB		 4084 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4085 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4086
66e67e41
JB		 4087 /* kick off associate process */
4088
4089 ifmgd->assoc_data = assoc_data;
826262c3 4090 ifmgd->dtim_period = 0;
66e67e41 4091
a1cf775d
JB		 4092 err = ieee80211_prep_connection(sdata, req->bss, true);
4093 if (err)
4094 goto err_clear;
66e67e41 4095
c65dd147
EG		 4096 rcu_read_lock();
4097 beacon_ies = rcu_dereference(req->bss->beacon_ies);
826262c3 4098
c65dd147
EG		 4099 if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC &&
4100 !beacon_ies) {
4101 /*
4102 * Wait up to one beacon interval ...
4103 * should this be more if we miss one?
4104 */
4105 sdata_info(sdata, "waiting for beacon from %pM\n",
4106 ifmgd->bssid);
4107 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
89afe614 4108 assoc_data->timeout_started = true;
c65dd147
EG		 4109 assoc_data->need_beacon = true;
4110 } else if (beacon_ies) {
4111 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4112 beacon_ies->data,
4113 beacon_ies->len);
ef429dad
JB		 4114 u8 dtim_count = 0;
4115
c65dd147
EG		 4116 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4117 const struct ieee80211_tim_ie *tim;
4118 tim = (void *)(tim_ie + 2);
4119 ifmgd->dtim_period = tim->dtim_period;
ef429dad 4120 dtim_count = tim->dtim_count;
826262c3 4121 }
66e67e41 4122 assoc_data->have_beacon = true;
66e67e41 4123 assoc_data->timeout = jiffies;
89afe614 4124 assoc_data->timeout_started = true;
ef429dad
JB		 4125
4126 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
4127 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4128 sdata->vif.bss_conf.sync_device_ts =
4129 bss->device_ts_beacon;
4130 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4131 }
c65dd147
EG		 4132 } else {
4133 assoc_data->timeout = jiffies;
89afe614 4134 assoc_data->timeout_started = true;
66e67e41 4135 }
c65dd147
EG		 4136 rcu_read_unlock();
4137
66e67e41
JB		 4138 run_again(ifmgd, assoc_data->timeout);
4139
fcff4f10
PS		 4140 if (bss->corrupt_data) {
4141 char *corrupt_type = "data";
4142 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4143 if (bss->corrupt_data &
4144 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4145 corrupt_type = "beacon and probe response";
4146 else
4147 corrupt_type = "beacon";
4148 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4149 corrupt_type = "probe response";
bdcbd8e0
JB		 4150 sdata_info(sdata, "associating with AP with corrupt %s\n",
4151 corrupt_type);
fcff4f10
PS		 4152 }
4153
66e67e41
JB		 4154 err = 0;
4155 goto out;
4156 err_clear:
3d2abdfd
EP		 4157 memset(ifmgd->bssid, 0, ETH_ALEN);
4158 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 4159 ifmgd->assoc_data = NULL;
4160 err_free:
4161 kfree(assoc_data);
4162 out:
4163 mutex_unlock(&ifmgd->mtx);
4164
4165 return err;
f0706e82
JB		 4166}
4167
77fdaa12 4168int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
63c9c5e7 4169 struct cfg80211_deauth_request *req)
f0706e82 4170{
46900298 4171 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 4172 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
6863255b 4173 bool tx = !req->local_state_change;
86552017 4174 bool sent_frame = false;
f0706e82 4175
77fdaa12
JB		 4176 mutex_lock(&ifmgd->mtx);
4177
bdcbd8e0
JB		 4178 sdata_info(sdata,
4179 "deauthenticating from %pM by local choice (reason=%d)\n",
4180 req->bssid, req->reason_code);
0ff71613 4181
86552017 4182 if (ifmgd->auth_data) {
8c7d857c 4183 drv_mgd_prepare_tx(sdata->local, sdata);
37ad3888
JB		 4184 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4185 IEEE80211_STYPE_DEAUTH,
6863255b 4186 req->reason_code, tx,
37ad3888 4187 frame_buf);
86552017
JB		 4188 ieee80211_destroy_auth_data(sdata, false);
4189 mutex_unlock(&ifmgd->mtx);
4190
4191 sent_frame = tx;
4192 goto out;
8c7d857c
EG		 4193 }
4194
86552017
JB		 4195 if (ifmgd->associated &&
4196 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
4197 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4198 req->reason_code, tx, frame_buf);
4199 sent_frame = tx;
4200 }
37ad3888
JB		 4201 mutex_unlock(&ifmgd->mtx);
4202
86552017 4203 out:
86552017
JB		 4204 if (sent_frame)
4205 __cfg80211_send_deauth(sdata->dev, frame_buf,
4206 IEEE80211_DEAUTH_FRAME_LEN);
4207
f0706e82
JB		 4208 return 0;
4209}
84363e6e 4210
77fdaa12 4211int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 4212 struct cfg80211_disassoc_request *req)
9c6bd790 4213{
77fdaa12 4214 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 4215 u8 bssid[ETH_ALEN];
6ae16775 4216 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
9c6bd790 4217
77fdaa12 4218 mutex_lock(&ifmgd->mtx);
10f644a4 4219
8d8b261a
JB		 4220 /*
4221 * cfg80211 should catch this ... but it's racy since
4222 * we can receive a disassoc frame, process it, hand it
4223 * to cfg80211 while that's in a locked section already
4224 * trying to tell us that the user wants to disconnect.
4225 */
0c1ad2ca 4226 if (ifmgd->associated != req->bss) {
77fdaa12
JB		 4227 mutex_unlock(&ifmgd->mtx);
4228 return -ENOLINK;
4229 }
4230
bdcbd8e0
JB		 4231 sdata_info(sdata,
4232 "disassociating from %pM by local choice (reason=%d)\n",
4233 req->bss->bssid, req->reason_code);
0ff71613 4234
e69e95db 4235 memcpy(bssid, req->bss->bssid, ETH_ALEN);
37ad3888
JB		 4236 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4237 req->reason_code, !req->local_state_change,
4238 frame_buf);
77fdaa12 4239 mutex_unlock(&ifmgd->mtx);
10f644a4 4240
6ae16775
AQ		 4241 __cfg80211_send_disassoc(sdata->dev, frame_buf,
4242 IEEE80211_DEAUTH_FRAME_LEN);
bc83b681 4243
10f644a4
JB		 4244 return 0;
4245}
026331c4 4246
afa762f6 4247void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
54e4ffb2
JB		 4248{
4249 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4250
49921859
BG		 4251 /*
4252 * Make sure some work items will not run after this,
4253 * they will not do anything but might not have been
4254 * cancelled when disconnecting.
4255 */
4256 cancel_work_sync(&ifmgd->monitor_work);
4257 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
4258 cancel_work_sync(&ifmgd->request_smps_work);
4259 cancel_work_sync(&ifmgd->csa_connection_drop_work);
4260 cancel_work_sync(&ifmgd->chswitch_work);
4261
54e4ffb2
JB		 4262 mutex_lock(&ifmgd->mtx);
4263 if (ifmgd->assoc_data)
4264 ieee80211_destroy_assoc_data(sdata, false);
4265 if (ifmgd->auth_data)
4266 ieee80211_destroy_auth_data(sdata, false);
4267 del_timer_sync(&ifmgd->timer);
4268 mutex_unlock(&ifmgd->mtx);
4269}
4270
a97c13c3
JO		 4271void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
4272 enum nl80211_cqm_rssi_threshold_event rssi_event,
4273 gfp_t gfp)
4274{
4275 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4276
b5878a2d
JB		 4277 trace_api_cqm_rssi_notify(sdata, rssi_event);
4278
a97c13c3
JO		 4279 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
4280}
4281EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
Linux kernel - Deliverables
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