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mac80211: fix powersave bug and clean up ieee80211_rx_bss_info
[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 */
59c1ec2b
BG		 59static int beacon_loss_count = 7;
60module_param(beacon_loss_count, int, 0644);
61MODULE_PARM_DESC(beacon_loss_count,
62 "Number of beacon intervals before we decide beacon was lost.");
7ccc8bd7 63
b291ba11
JB		 64/*
65 * Time the connection can be idle before we probe
66 * it to see if we can still talk to the AP.
67 */
d1c5091f 68#define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
b291ba11
JB		 69/*
70 * Time we wait for a probe response after sending
71 * a probe request because of beacon loss or for
72 * checking the connection still works.
73 */
180205bd
BG		 74static int probe_wait_ms = 500;
75module_param(probe_wait_ms, int, 0644);
76MODULE_PARM_DESC(probe_wait_ms,
77 "Maximum time(ms) to wait for probe response"
78 " before disconnecting (reason 4).");
f0706e82 79
17e4ec14
JM		 80/*
81 * Weight given to the latest Beacon frame when calculating average signal
82 * strength for Beacon frames received in the current BSS. This must be
83 * between 1 and 15.
84 */
85#define IEEE80211_SIGNAL_AVE_WEIGHT 3
86
391a200a
JM		 87/*
88 * How many Beacon frames need to have been used in average signal strength
89 * before starting to indicate signal change events.
90 */
91#define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
92
ca386f31
JB		 93/*
94 * We can have multiple work items (and connection probing)
95 * scheduling this timer, but we need to take care to only
96 * reschedule it when it should fire _earlier_ than it was
97 * asked for before, or if it's not pending right now. This
98 * function ensures that. Note that it then is required to
99 * run this function for all timeouts after the first one
100 * has happened -- the work that runs from this timer will
101 * do that.
102 */
8d61ffa5
JB		 103static void run_again(struct ieee80211_sub_if_data *sdata,
104 unsigned long timeout)
ca386f31 105{
8d61ffa5 106 sdata_assert_lock(sdata);
ca386f31 107
8d61ffa5
JB		 108 if (!timer_pending(&sdata->u.mgd.timer) ||
109 time_before(timeout, sdata->u.mgd.timer.expires))
110 mod_timer(&sdata->u.mgd.timer, timeout);
ca386f31
JB		 111}
112
d3a910a8 113void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
b291ba11 114{
c1288b12 115 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
b291ba11
JB		 116 return;
117
7eeff74c
JB		 118 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
119 return;
120
b291ba11 121 mod_timer(&sdata->u.mgd.bcn_mon_timer,
7ccc8bd7 122 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
b291ba11
JB		 123}
124
be099e82
LR		 125void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
126{
0c699c3a
LR		 127 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
128
8628172f
SG		 129 if (unlikely(!sdata->u.mgd.associated))
130 return;
131
be099e82
LR		 132 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
133 return;
134
135 mod_timer(&sdata->u.mgd.conn_mon_timer,
136 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
0c699c3a
LR		 137
138 ifmgd->probe_send_count = 0;
be099e82
LR		 139}
140
5484e237 141static int ecw2cw(int ecw)
60f8b39c 142{
5484e237 143 return (1 << ecw) - 1;
60f8b39c
JB		 144}
145
6565ec9b
JB		 146static u32 chandef_downgrade(struct cfg80211_chan_def *c)
147{
148 u32 ret;
149 int tmp;
150
151 switch (c->width) {
152 case NL80211_CHAN_WIDTH_20:
153 c->width = NL80211_CHAN_WIDTH_20_NOHT;
154 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
155 break;
156 case NL80211_CHAN_WIDTH_40:
157 c->width = NL80211_CHAN_WIDTH_20;
158 c->center_freq1 = c->chan->center_freq;
159 ret = IEEE80211_STA_DISABLE_40MHZ |
160 IEEE80211_STA_DISABLE_VHT;
161 break;
162 case NL80211_CHAN_WIDTH_80:
163 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
164 /* n_P40 */
165 tmp /= 2;
166 /* freq_P40 */
167 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
168 c->width = NL80211_CHAN_WIDTH_40;
169 ret = IEEE80211_STA_DISABLE_VHT;
170 break;
171 case NL80211_CHAN_WIDTH_80P80:
172 c->center_freq2 = 0;
173 c->width = NL80211_CHAN_WIDTH_80;
174 ret = IEEE80211_STA_DISABLE_80P80MHZ |
175 IEEE80211_STA_DISABLE_160MHZ;
176 break;
177 case NL80211_CHAN_WIDTH_160:
178 /* n_P20 */
179 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
180 /* n_P80 */
181 tmp /= 4;
182 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
183 c->width = NL80211_CHAN_WIDTH_80;
184 ret = IEEE80211_STA_DISABLE_80P80MHZ |
185 IEEE80211_STA_DISABLE_160MHZ;
186 break;
187 default:
188 case NL80211_CHAN_WIDTH_20_NOHT:
189 WARN_ON_ONCE(1);
190 c->width = NL80211_CHAN_WIDTH_20_NOHT;
191 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
192 break;
193 }
194
195 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
196
197 return ret;
198}
199
200static u32
201ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
202 struct ieee80211_supported_band *sband,
203 struct ieee80211_channel *channel,
204 const struct ieee80211_ht_operation *ht_oper,
205 const struct ieee80211_vht_operation *vht_oper,
30eb1dc2 206 struct cfg80211_chan_def *chandef, bool verbose)
6565ec9b
JB		 207{
208 struct cfg80211_chan_def vht_chandef;
209 u32 ht_cfreq, ret;
210
211 chandef->chan = channel;
212 chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
213 chandef->center_freq1 = channel->center_freq;
214 chandef->center_freq2 = 0;
215
216 if (!ht_oper || !sband->ht_cap.ht_supported) {
217 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
218 goto out;
219 }
220
221 chandef->width = NL80211_CHAN_WIDTH_20;
222
223 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
224 channel->band);
225 /* check that channel matches the right operating channel */
226 if (channel->center_freq != ht_cfreq) {
227 /*
228 * It's possible that some APs are confused here;
229 * Netgear WNDR3700 sometimes reports 4 higher than
230 * the actual channel in association responses, but
231 * since we look at probe response/beacon data here
232 * it should be OK.
233 */
30eb1dc2
JB		 234 if (verbose)
235 sdata_info(sdata,
236 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
237 channel->center_freq, ht_cfreq,
238 ht_oper->primary_chan, channel->band);
6565ec9b
JB		 239 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
240 goto out;
241 }
242
243 /* check 40 MHz support, if we have it */
244 if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
245 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
246 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
247 chandef->width = NL80211_CHAN_WIDTH_40;
248 chandef->center_freq1 += 10;
249 break;
250 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
251 chandef->width = NL80211_CHAN_WIDTH_40;
252 chandef->center_freq1 -= 10;
253 break;
254 }
255 } else {
256 /* 40 MHz (and 80 MHz) must be supported for VHT */
257 ret = IEEE80211_STA_DISABLE_VHT;
85220d71
JB		 258 /* also mark 40 MHz disabled */
259 ret |= IEEE80211_STA_DISABLE_40MHZ;
6565ec9b
JB		 260 goto out;
261 }
262
263 if (!vht_oper || !sband->vht_cap.vht_supported) {
264 ret = IEEE80211_STA_DISABLE_VHT;
265 goto out;
266 }
267
268 vht_chandef.chan = channel;
269 vht_chandef.center_freq1 =
270 ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx,
271 channel->band);
272 vht_chandef.center_freq2 = 0;
273
6565ec9b
JB		 274 switch (vht_oper->chan_width) {
275 case IEEE80211_VHT_CHANWIDTH_USE_HT:
276 vht_chandef.width = chandef->width;
277 break;
278 case IEEE80211_VHT_CHANWIDTH_80MHZ:
279 vht_chandef.width = NL80211_CHAN_WIDTH_80;
280 break;
281 case IEEE80211_VHT_CHANWIDTH_160MHZ:
282 vht_chandef.width = NL80211_CHAN_WIDTH_160;
283 break;
284 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
285 vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
6553bf04
JB		 286 vht_chandef.center_freq2 =
287 ieee80211_channel_to_frequency(
288 vht_oper->center_freq_seg2_idx,
289 channel->band);
6565ec9b
JB		 290 break;
291 default:
30eb1dc2
JB		 292 if (verbose)
293 sdata_info(sdata,
294 "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
295 vht_oper->chan_width);
6565ec9b
JB		 296 ret = IEEE80211_STA_DISABLE_VHT;
297 goto out;
298 }
299
300 if (!cfg80211_chandef_valid(&vht_chandef)) {
30eb1dc2
JB		 301 if (verbose)
302 sdata_info(sdata,
303 "AP VHT information is invalid, disable VHT\n");
6565ec9b
JB		 304 ret = IEEE80211_STA_DISABLE_VHT;
305 goto out;
306 }
307
308 if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
309 ret = 0;
310 goto out;
311 }
312
313 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
30eb1dc2
JB		 314 if (verbose)
315 sdata_info(sdata,
316 "AP VHT information doesn't match HT, disable VHT\n");
6565ec9b
JB		 317 ret = IEEE80211_STA_DISABLE_VHT;
318 goto out;
319 }
320
321 *chandef = vht_chandef;
322
323 ret = 0;
324
325out:
586e01ed
JB		 326 /* don't print the message below for VHT mismatch if VHT is disabled */
327 if (ret & IEEE80211_STA_DISABLE_VHT)
328 vht_chandef = *chandef;
329
6565ec9b
JB		 330 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
331 IEEE80211_CHAN_DISABLED)) {
332 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
333 ret = IEEE80211_STA_DISABLE_HT |
334 IEEE80211_STA_DISABLE_VHT;
335 goto out;
336 }
337
338 ret |= chandef_downgrade(chandef);
339 }
340
30eb1dc2 341 if (chandef->width != vht_chandef.width && verbose)
6565ec9b
JB		 342 sdata_info(sdata,
343 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
344
345 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
346 return ret;
347}
348
30eb1dc2
JB		 349static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
350 struct sta_info *sta,
351 const struct ieee80211_ht_operation *ht_oper,
352 const struct ieee80211_vht_operation *vht_oper,
353 const u8 *bssid, u32 *changed)
d5522e03
JB		 354{
355 struct ieee80211_local *local = sdata->local;
30eb1dc2 356 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d5522e03 357 struct ieee80211_supported_band *sband;
55de908a 358 struct ieee80211_channel *chan;
30eb1dc2 359 struct cfg80211_chan_def chandef;
9ed6bcce 360 u16 ht_opmode;
30eb1dc2
JB		 361 u32 flags;
362 enum ieee80211_sta_rx_bandwidth new_sta_bw;
363 int ret;
d5522e03 364
30eb1dc2
JB		 365 /* if HT was/is disabled, don't track any bandwidth changes */
366 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
1128958d
JB		 367 return 0;
368
30eb1dc2
JB		 369 /* don't check VHT if we associated as non-VHT station */
370 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
371 vht_oper = NULL;
372
373 if (WARN_ON_ONCE(!sta))
374 return -EINVAL;
375
f2d9330e 376 chan = sdata->vif.bss_conf.chandef.chan;
55de908a 377 sband = local->hw.wiphy->bands[chan->band];
d5522e03 378
30eb1dc2
JB		 379 /* calculate new channel (type) based on HT/VHT operation IEs */
380 flags = ieee80211_determine_chantype(sdata, sband, chan, ht_oper,
381 vht_oper, &chandef, false);
382
383 /*
384 * Downgrade the new channel if we associated with restricted
385 * capabilities. For example, if we associated as a 20 MHz STA
386 * to a 40 MHz AP (due to regulatory, capabilities or config
387 * reasons) then switching to a 40 MHz channel now won't do us
388 * any good -- we couldn't use it with the AP.
389 */
390 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
391 chandef.width == NL80211_CHAN_WIDTH_80P80)
392 flags |= chandef_downgrade(&chandef);
393 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
394 chandef.width == NL80211_CHAN_WIDTH_160)
395 flags |= chandef_downgrade(&chandef);
396 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
397 chandef.width > NL80211_CHAN_WIDTH_20)
398 flags |= chandef_downgrade(&chandef);
399
400 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
401 return 0;
402
403 sdata_info(sdata,
404 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
405 ifmgd->bssid, chandef.chan->center_freq, chandef.width,
406 chandef.center_freq1, chandef.center_freq2);
407
408 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
409 IEEE80211_STA_DISABLE_VHT |
410 IEEE80211_STA_DISABLE_40MHZ |
411 IEEE80211_STA_DISABLE_80P80MHZ |
412 IEEE80211_STA_DISABLE_160MHZ)) ||
413 !cfg80211_chandef_valid(&chandef)) {
414 sdata_info(sdata,
415 "AP %pM changed bandwidth in a way we can't support - disconnect\n",
416 ifmgd->bssid);
417 return -EINVAL;
418 }
419
420 switch (chandef.width) {
421 case NL80211_CHAN_WIDTH_20_NOHT:
422 case NL80211_CHAN_WIDTH_20:
423 new_sta_bw = IEEE80211_STA_RX_BW_20;
424 break;
4bf88530 425 case NL80211_CHAN_WIDTH_40:
30eb1dc2 426 new_sta_bw = IEEE80211_STA_RX_BW_40;
64f68e5d 427 break;
30eb1dc2
JB		 428 case NL80211_CHAN_WIDTH_80:
429 new_sta_bw = IEEE80211_STA_RX_BW_80;
430 break;
431 case NL80211_CHAN_WIDTH_80P80:
432 case NL80211_CHAN_WIDTH_160:
433 new_sta_bw = IEEE80211_STA_RX_BW_160;
64f68e5d 434 break;
30eb1dc2
JB		 435 default:
436 return -EINVAL;
64f68e5d 437 }
d5522e03 438
30eb1dc2
JB		 439 if (new_sta_bw > sta->cur_max_bandwidth)
440 new_sta_bw = sta->cur_max_bandwidth;
64f68e5d 441
30eb1dc2
JB		 442 if (new_sta_bw < sta->sta.bandwidth) {
443 sta->sta.bandwidth = new_sta_bw;
444 rate_control_rate_update(local, sband, sta,
445 IEEE80211_RC_BW_CHANGED);
446 }
64f68e5d 447
30eb1dc2
JB		 448 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
449 if (ret) {
450 sdata_info(sdata,
451 "AP %pM changed bandwidth to incompatible one - disconnect\n",
452 ifmgd->bssid);
453 return ret;
454 }
7cc44ed4 455
30eb1dc2
JB		 456 if (new_sta_bw > sta->sta.bandwidth) {
457 sta->sta.bandwidth = new_sta_bw;
458 rate_control_rate_update(local, sband, sta,
459 IEEE80211_RC_BW_CHANGED);
0aaffa9b 460 }
d5522e03 461
074d46d1 462 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
d5522e03
JB		 463
464 /* if bss configuration changed store the new one */
30eb1dc2
JB		 465 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
466 *changed |= BSS_CHANGED_HT;
9ed6bcce 467 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
d5522e03
JB		 468 }
469
30eb1dc2 470 return 0;
d5522e03
JB		 471}
472
9c6bd790
JB		 473/* frame sending functions */
474
66e67e41
JB		 475static int ieee80211_compatible_rates(const u8 *supp_rates, int supp_rates_len,
476 struct ieee80211_supported_band *sband,
477 u32 *rates)
478{
479 int i, j, count;
480 *rates = 0;
481 count = 0;
482 for (i = 0; i < supp_rates_len; i++) {
483 int rate = (supp_rates[i] & 0x7F) * 5;
484
485 for (j = 0; j < sband->n_bitrates; j++)
486 if (sband->bitrates[j].bitrate == rate) {
487 *rates |= BIT(j);
488 count++;
489 break;
490 }
491 }
492
493 return count;
494}
495
496static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
9dde6423 497 struct sk_buff *skb, u8 ap_ht_param,
66e67e41
JB		 498 struct ieee80211_supported_band *sband,
499 struct ieee80211_channel *channel,
500 enum ieee80211_smps_mode smps)
501{
66e67e41
JB		 502 u8 *pos;
503 u32 flags = channel->flags;
504 u16 cap;
505 struct ieee80211_sta_ht_cap ht_cap;
506
507 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
508
66e67e41
JB		 509 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
510 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
511
66e67e41
JB		 512 /* determine capability flags */
513 cap = ht_cap.cap;
514
9dde6423 515 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
66e67e41
JB		 516 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
517 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
518 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
519 cap &= ~IEEE80211_HT_CAP_SGI_40;
520 }
521 break;
522 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
523 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
524 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
525 cap &= ~IEEE80211_HT_CAP_SGI_40;
526 }
527 break;
528 }
529
24398e39
JB		 530 /*
531 * If 40 MHz was disabled associate as though we weren't
532 * capable of 40 MHz -- some broken APs will never fall
533 * back to trying to transmit in 20 MHz.
534 */
535 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
536 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
537 cap &= ~IEEE80211_HT_CAP_SGI_40;
538 }
539
66e67e41
JB		 540 /* set SM PS mode properly */
541 cap &= ~IEEE80211_HT_CAP_SM_PS;
542 switch (smps) {
543 case IEEE80211_SMPS_AUTOMATIC:
544 case IEEE80211_SMPS_NUM_MODES:
545 WARN_ON(1);
546 case IEEE80211_SMPS_OFF:
547 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
548 IEEE80211_HT_CAP_SM_PS_SHIFT;
549 break;
550 case IEEE80211_SMPS_STATIC:
551 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
552 IEEE80211_HT_CAP_SM_PS_SHIFT;
553 break;
554 case IEEE80211_SMPS_DYNAMIC:
555 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
556 IEEE80211_HT_CAP_SM_PS_SHIFT;
557 break;
558 }
559
560 /* reserve and fill IE */
561 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
562 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
563}
564
d545daba
MP		 565static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
566 struct sk_buff *skb,
b08fbbd8
JB		 567 struct ieee80211_supported_band *sband,
568 struct ieee80211_vht_cap *ap_vht_cap)
d545daba
MP		 569{
570 u8 *pos;
571 u32 cap;
572 struct ieee80211_sta_vht_cap vht_cap;
573
574 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
575
576 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
dd5ecfea 577 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
d545daba
MP		 578
579 /* determine capability flags */
580 cap = vht_cap.cap;
581
f2d9d270
JB		 582 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
583 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ;
584 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
585 }
586
587 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
588 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
589 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
590 }
591
b08fbbd8
JB		 592 /*
593 * Some APs apparently get confused if our capabilities are better
594 * than theirs, so restrict what we advertise in the assoc request.
595 */
596 if (!(ap_vht_cap->vht_cap_info &
597 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
598 cap &= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE;
599
d545daba 600 /* reserve and fill IE */
d4950281 601 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
d545daba
MP		 602 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
603}
604
66e67e41
JB		 605static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
606{
607 struct ieee80211_local *local = sdata->local;
608 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
609 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
610 struct sk_buff *skb;
611 struct ieee80211_mgmt *mgmt;
612 u8 *pos, qos_info;
613 size_t offset = 0, noffset;
614 int i, count, rates_len, supp_rates_len;
615 u16 capab;
616 struct ieee80211_supported_band *sband;
55de908a
JB		 617 struct ieee80211_chanctx_conf *chanctx_conf;
618 struct ieee80211_channel *chan;
66e67e41 619 u32 rates = 0;
66e67e41 620
8d61ffa5 621 sdata_assert_lock(sdata);
66e67e41 622
55de908a
JB		 623 rcu_read_lock();
624 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
625 if (WARN_ON(!chanctx_conf)) {
626 rcu_read_unlock();
627 return;
628 }
4bf88530 629 chan = chanctx_conf->def.chan;
55de908a
JB		 630 rcu_read_unlock();
631 sband = local->hw.wiphy->bands[chan->band];
66e67e41
JB		 632
633 if (assoc_data->supp_rates_len) {
634 /*
635 * Get all rates supported by the device and the AP as
636 * some APs don't like getting a superset of their rates
637 * in the association request (e.g. D-Link DAP 1353 in
638 * b-only mode)...
639 */
640 rates_len = ieee80211_compatible_rates(assoc_data->supp_rates,
641 assoc_data->supp_rates_len,
642 sband, &rates);
643 } else {
644 /*
645 * In case AP not provide any supported rates information
646 * before association, we send information element(s) with
647 * all rates that we support.
648 */
649 rates = ~0;
650 rates_len = sband->n_bitrates;
651 }
652
653 skb = alloc_skb(local->hw.extra_tx_headroom +
654 sizeof(*mgmt) + /* bit too much but doesn't matter */
655 2 + assoc_data->ssid_len + /* SSID */
656 4 + rates_len + /* (extended) rates */
657 4 + /* power capability */
658 2 + 2 * sband->n_channels + /* supported channels */
659 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
d4950281 660 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
66e67e41
JB		 661 assoc_data->ie_len + /* extra IEs */
662 9, /* WMM */
663 GFP_KERNEL);
664 if (!skb)
665 return;
666
667 skb_reserve(skb, local->hw.extra_tx_headroom);
668
669 capab = WLAN_CAPABILITY_ESS;
670
671 if (sband->band == IEEE80211_BAND_2GHZ) {
672 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
673 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
674 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
675 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
676 }
677
678 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
679 capab |= WLAN_CAPABILITY_PRIVACY;
680
681 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
682 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
683 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
684
685 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
686 memset(mgmt, 0, 24);
687 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
688 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
689 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
690
691 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
692 skb_put(skb, 10);
693 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
694 IEEE80211_STYPE_REASSOC_REQ);
695 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
696 mgmt->u.reassoc_req.listen_interval =
697 cpu_to_le16(local->hw.conf.listen_interval);
698 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
699 ETH_ALEN);
700 } else {
701 skb_put(skb, 4);
702 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
703 IEEE80211_STYPE_ASSOC_REQ);
704 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
705 mgmt->u.assoc_req.listen_interval =
706 cpu_to_le16(local->hw.conf.listen_interval);
707 }
708
709 /* SSID */
710 pos = skb_put(skb, 2 + assoc_data->ssid_len);
711 *pos++ = WLAN_EID_SSID;
712 *pos++ = assoc_data->ssid_len;
713 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
714
715 /* add all rates which were marked to be used above */
716 supp_rates_len = rates_len;
717 if (supp_rates_len > 8)
718 supp_rates_len = 8;
719
720 pos = skb_put(skb, supp_rates_len + 2);
721 *pos++ = WLAN_EID_SUPP_RATES;
722 *pos++ = supp_rates_len;
723
724 count = 0;
725 for (i = 0; i < sband->n_bitrates; i++) {
726 if (BIT(i) & rates) {
727 int rate = sband->bitrates[i].bitrate;
728 *pos++ = (u8) (rate / 5);
729 if (++count == 8)
730 break;
731 }
732 }
733
734 if (rates_len > count) {
735 pos = skb_put(skb, rates_len - count + 2);
736 *pos++ = WLAN_EID_EXT_SUPP_RATES;
737 *pos++ = rates_len - count;
738
739 for (i++; i < sband->n_bitrates; i++) {
740 if (BIT(i) & rates) {
741 int rate = sband->bitrates[i].bitrate;
742 *pos++ = (u8) (rate / 5);
743 }
744 }
745 }
746
747 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
748 /* 1. power capabilities */
749 pos = skb_put(skb, 4);
750 *pos++ = WLAN_EID_PWR_CAPABILITY;
751 *pos++ = 2;
752 *pos++ = 0; /* min tx power */
55de908a 753 *pos++ = chan->max_power; /* max tx power */
66e67e41
JB		 754
755 /* 2. supported channels */
756 /* TODO: get this in reg domain format */
757 pos = skb_put(skb, 2 * sband->n_channels + 2);
758 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
759 *pos++ = 2 * sband->n_channels;
760 for (i = 0; i < sband->n_channels; i++) {
761 *pos++ = ieee80211_frequency_to_channel(
762 sband->channels[i].center_freq);
763 *pos++ = 1; /* one channel in the subband*/
764 }
765 }
766
767 /* if present, add any custom IEs that go before HT */
768 if (assoc_data->ie_len && assoc_data->ie) {
769 static const u8 before_ht[] = {
770 WLAN_EID_SSID,
771 WLAN_EID_SUPP_RATES,
772 WLAN_EID_EXT_SUPP_RATES,
773 WLAN_EID_PWR_CAPABILITY,
774 WLAN_EID_SUPPORTED_CHANNELS,
775 WLAN_EID_RSN,
776 WLAN_EID_QOS_CAPA,
777 WLAN_EID_RRM_ENABLED_CAPABILITIES,
778 WLAN_EID_MOBILITY_DOMAIN,
779 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
780 };
781 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
782 before_ht, ARRAY_SIZE(before_ht),
783 offset);
784 pos = skb_put(skb, noffset - offset);
785 memcpy(pos, assoc_data->ie + offset, noffset - offset);
786 offset = noffset;
787 }
788
f2d9d270
JB		 789 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
790 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
791 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
792
a8243b72 793 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
9dde6423 794 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
04ecd257 795 sband, chan, sdata->smps_mode);
66e67e41 796
d545daba 797 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
b08fbbd8
JB		 798 ieee80211_add_vht_ie(sdata, skb, sband,
799 &assoc_data->ap_vht_cap);
d545daba 800
66e67e41
JB		 801 /* if present, add any custom non-vendor IEs that go after HT */
802 if (assoc_data->ie_len && assoc_data->ie) {
803 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
804 assoc_data->ie_len,
805 offset);
806 pos = skb_put(skb, noffset - offset);
807 memcpy(pos, assoc_data->ie + offset, noffset - offset);
808 offset = noffset;
809 }
810
76f0303d
JB		 811 if (assoc_data->wmm) {
812 if (assoc_data->uapsd) {
dc41e4d4
EP		 813 qos_info = ifmgd->uapsd_queues;
814 qos_info |= (ifmgd->uapsd_max_sp_len <<
66e67e41
JB		 815 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
816 } else {
817 qos_info = 0;
818 }
819
820 pos = skb_put(skb, 9);
821 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
822 *pos++ = 7; /* len */
823 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
824 *pos++ = 0x50;
825 *pos++ = 0xf2;
826 *pos++ = 2; /* WME */
827 *pos++ = 0; /* WME info */
828 *pos++ = 1; /* WME ver */
829 *pos++ = qos_info;
830 }
831
832 /* add any remaining custom (i.e. vendor specific here) IEs */
833 if (assoc_data->ie_len && assoc_data->ie) {
834 noffset = assoc_data->ie_len;
835 pos = skb_put(skb, noffset - offset);
836 memcpy(pos, assoc_data->ie + offset, noffset - offset);
837 }
838
a1845fc7
JB		 839 drv_mgd_prepare_tx(local, sdata);
840
66e67e41 841 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1672c0e3
JB		 842 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
843 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
844 IEEE80211_TX_INTFL_MLME_CONN_TX;
66e67e41
JB		 845 ieee80211_tx_skb(sdata, skb);
846}
847
572e0012
KV		 848void ieee80211_send_pspoll(struct ieee80211_local *local,
849 struct ieee80211_sub_if_data *sdata)
850{
572e0012
KV		 851 struct ieee80211_pspoll *pspoll;
852 struct sk_buff *skb;
572e0012 853
d8cd189e
KV		 854 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
855 if (!skb)
572e0012 856 return;
572e0012 857
d8cd189e
KV		 858 pspoll = (struct ieee80211_pspoll *) skb->data;
859 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
572e0012 860
62ae67be
JB		 861 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
862 ieee80211_tx_skb(sdata, skb);
572e0012
KV		 863}
864
965bedad
JB		 865void ieee80211_send_nullfunc(struct ieee80211_local *local,
866 struct ieee80211_sub_if_data *sdata,
867 int powersave)
868{
869 struct sk_buff *skb;
d8cd189e 870 struct ieee80211_hdr_3addr *nullfunc;
b6f35301 871 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
965bedad 872
d8cd189e
KV		 873 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
874 if (!skb)
965bedad 875 return;
965bedad 876
d8cd189e 877 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
965bedad 878 if (powersave)
d8cd189e 879 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
965bedad 880
6c17b77b
SF		 881 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
882 IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
ff40b425
PF		 883
884 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
885 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
886
b6f35301
RM		 887 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
888 IEEE80211_STA_CONNECTION_POLL))
889 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
890
62ae67be 891 ieee80211_tx_skb(sdata, skb);
965bedad
JB		 892}
893
d524215f
FF		 894static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
895 struct ieee80211_sub_if_data *sdata)
896{
897 struct sk_buff *skb;
898 struct ieee80211_hdr *nullfunc;
899 __le16 fc;
900
901 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
902 return;
903
904 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
d15b8459 905 if (!skb)
d524215f 906 return;
d15b8459 907
d524215f
FF		 908 skb_reserve(skb, local->hw.extra_tx_headroom);
909
910 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
911 memset(nullfunc, 0, 30);
912 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
913 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
914 nullfunc->frame_control = fc;
915 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
916 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
917 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
918 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
919
920 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
921 ieee80211_tx_skb(sdata, skb);
922}
923
cc32abd4
JB		 924/* spectrum management related things */
925static void ieee80211_chswitch_work(struct work_struct *work)
926{
927 struct ieee80211_sub_if_data *sdata =
928 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
675a0b04 929 struct ieee80211_local *local = sdata->local;
cc32abd4
JB		 930 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
931
9607e6b6 932 if (!ieee80211_sdata_running(sdata))
cc32abd4
JB		 933 return;
934
8d61ffa5 935 sdata_lock(sdata);
77fdaa12
JB		 936 if (!ifmgd->associated)
937 goto out;
cc32abd4 938
85220d71 939 local->_oper_chandef = local->csa_chandef;
675a0b04
KB		 940
941 if (!local->ops->channel_switch) {
5ce6e438 942 /* call "hw_config" only if doing sw channel switch */
675a0b04 943 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
1ea57b1f
SL		 944 } else {
945 /* update the device channel directly */
675a0b04 946 local->hw.conf.chandef = local->_oper_chandef;
5ce6e438 947 }
77fdaa12 948
cc32abd4 949 /* XXX: shouldn't really modify cfg80211-owned data! */
675a0b04 950 ifmgd->associated->channel = local->_oper_chandef.chan;
cc32abd4 951
57eebdf3 952 /* XXX: wait for a beacon first? */
675a0b04 953 ieee80211_wake_queues_by_reason(&local->hw,
445ea4e8 954 IEEE80211_MAX_QUEUE_MAP,
cc32abd4 955 IEEE80211_QUEUE_STOP_REASON_CSA);
77fdaa12
JB		 956 out:
957 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
8d61ffa5 958 sdata_unlock(sdata);
cc32abd4
JB		 959}
960
5ce6e438
JB		 961void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
962{
55de908a
JB		 963 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
964 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5ce6e438
JB		 965
966 trace_api_chswitch_done(sdata, success);
967 if (!success) {
882a7c69
JB		 968 sdata_info(sdata,
969 "driver channel switch failed, disconnecting\n");
970 ieee80211_queue_work(&sdata->local->hw,
971 &ifmgd->csa_connection_drop_work);
972 } else {
973 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
5ce6e438 974 }
5ce6e438
JB		 975}
976EXPORT_SYMBOL(ieee80211_chswitch_done);
977
cc32abd4
JB		 978static void ieee80211_chswitch_timer(unsigned long data)
979{
980 struct ieee80211_sub_if_data *sdata =
981 (struct ieee80211_sub_if_data *) data;
5bb644a0 982
9b7d72c1 983 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
cc32abd4
JB		 984}
985
37799e52 986static void
4a3cb702 987ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
04a161f4
JB		 988 u64 timestamp, struct ieee802_11_elems *elems,
989 bool beacon)
cc32abd4 990{
b4f286a1 991 struct ieee80211_local *local = sdata->local;
cc32abd4 992 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
37799e52
JB		 993 struct cfg80211_bss *cbss = ifmgd->associated;
994 struct ieee80211_bss *bss;
55de908a 995 struct ieee80211_chanctx *chanctx;
b4f286a1
JB		 996 enum ieee80211_band new_band;
997 int new_freq;
998 u8 new_chan_no;
999 u8 count;
1000 u8 mode;
cd64f2a9 1001 struct ieee80211_channel *new_chan;
85220d71 1002 struct cfg80211_chan_def new_chandef = {};
cd64f2a9
JB		 1003 struct cfg80211_chan_def new_vht_chandef = {};
1004 const struct ieee80211_sec_chan_offs_ie *sec_chan_offs;
1005 const struct ieee80211_wide_bw_chansw_ie *wide_bw_chansw_ie;
04a161f4 1006 const struct ieee80211_ht_operation *ht_oper;
85220d71 1007 int secondary_channel_offset = -1;
cc32abd4 1008
8d61ffa5 1009 sdata_assert_lock(sdata);
77fdaa12 1010
37799e52 1011 if (!cbss)
cc32abd4
JB		 1012 return;
1013
b4f286a1 1014 if (local->scanning)
cc32abd4
JB		 1015 return;
1016
37799e52 1017 /* disregard subsequent announcements if we are already processing */
cc32abd4
JB		 1018 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
1019 return;
1020
cd64f2a9
JB		 1021 sec_chan_offs = elems->sec_chan_offs;
1022 wide_bw_chansw_ie = elems->wide_bw_chansw_ie;
04a161f4 1023 ht_oper = elems->ht_operation;
cd64f2a9
JB		 1024
1025 if (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
1026 IEEE80211_STA_DISABLE_40MHZ)) {
1027 sec_chan_offs = NULL;
1028 wide_bw_chansw_ie = NULL;
04a161f4
JB		 1029 /* only used for bandwidth here */
1030 ht_oper = NULL;
85220d71
JB		 1031 }
1032
cd64f2a9
JB		 1033 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
1034 wide_bw_chansw_ie = NULL;
85220d71 1035
b4f286a1
JB		 1036 if (elems->ext_chansw_ie) {
1037 if (!ieee80211_operating_class_to_band(
1038 elems->ext_chansw_ie->new_operating_class,
1039 &new_band)) {
1040 sdata_info(sdata,
1041 "cannot understand ECSA IE operating class %d, disconnecting\n",
1042 elems->ext_chansw_ie->new_operating_class);
1043 ieee80211_queue_work(&local->hw,
1044 &ifmgd->csa_connection_drop_work);
1045 }
1046 new_chan_no = elems->ext_chansw_ie->new_ch_num;
1047 count = elems->ext_chansw_ie->count;
1048 mode = elems->ext_chansw_ie->mode;
1049 } else if (elems->ch_switch_ie) {
1050 new_band = cbss->channel->band;
1051 new_chan_no = elems->ch_switch_ie->new_ch_num;
1052 count = elems->ch_switch_ie->count;
1053 mode = elems->ch_switch_ie->mode;
1054 } else {
1055 /* nothing here we understand */
37799e52 1056 return;
b4f286a1 1057 }
37799e52
JB		 1058
1059 bss = (void *)cbss->priv;
1060
b4f286a1 1061 new_freq = ieee80211_channel_to_frequency(new_chan_no, new_band);
cd64f2a9
JB		 1062 new_chan = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
1063 if (!new_chan || new_chan->flags & IEEE80211_CHAN_DISABLED) {
882a7c69
JB		 1064 sdata_info(sdata,
1065 "AP %pM switches to unsupported channel (%d MHz), disconnecting\n",
1066 ifmgd->associated->bssid, new_freq);
b4f286a1 1067 ieee80211_queue_work(&local->hw,
882a7c69 1068 &ifmgd->csa_connection_drop_work);
cc32abd4 1069 return;
882a7c69 1070 }
cc32abd4 1071
04a161f4 1072 if (!beacon && sec_chan_offs) {
cd64f2a9 1073 secondary_channel_offset = sec_chan_offs->sec_chan_offs;
04a161f4
JB		 1074 } else if (beacon && ht_oper) {
1075 secondary_channel_offset =
1076 ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET;
cd64f2a9 1077 } else if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
04a161f4
JB		 1078 /*
1079 * If it's not a beacon, HT is enabled and the IE not present,
1080 * it's 20 MHz, 802.11-2012 8.5.2.6:
1081 * This element [the Secondary Channel Offset Element] is
1082 * present when switching to a 40 MHz channel. It may be
1083 * present when switching to a 20 MHz channel (in which
1084 * case the secondary channel offset is set to SCN).
1085 */
cd64f2a9
JB		 1086 secondary_channel_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE;
1087 }
1088
85220d71
JB		 1089 switch (secondary_channel_offset) {
1090 default:
1091 /* secondary_channel_offset was present but is invalid */
1092 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
cd64f2a9 1093 cfg80211_chandef_create(&new_chandef, new_chan,
85220d71
JB		 1094 NL80211_CHAN_HT20);
1095 break;
1096 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
cd64f2a9 1097 cfg80211_chandef_create(&new_chandef, new_chan,
85220d71
JB		 1098 NL80211_CHAN_HT40PLUS);
1099 break;
1100 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
cd64f2a9 1101 cfg80211_chandef_create(&new_chandef, new_chan,
85220d71
JB		 1102 NL80211_CHAN_HT40MINUS);
1103 break;
1104 case -1:
cd64f2a9 1105 cfg80211_chandef_create(&new_chandef, new_chan,
85220d71
JB		 1106 NL80211_CHAN_NO_HT);
1107 break;
1108 }
1109
cd64f2a9
JB		 1110 if (wide_bw_chansw_ie) {
1111 new_vht_chandef.chan = new_chan;
1112 new_vht_chandef.center_freq1 =
1113 ieee80211_channel_to_frequency(
1114 wide_bw_chansw_ie->new_center_freq_seg0,
1115 new_band);
1116
1117 switch (wide_bw_chansw_ie->new_channel_width) {
1118 default:
1119 /* hmmm, ignore VHT and use HT if present */
1120 case IEEE80211_VHT_CHANWIDTH_USE_HT:
1121 new_vht_chandef.chan = NULL;
1122 break;
1123 case IEEE80211_VHT_CHANWIDTH_80MHZ:
1124 new_vht_chandef.width = NL80211_CHAN_WIDTH_80;
1125 break;
1126 case IEEE80211_VHT_CHANWIDTH_160MHZ:
1127 new_vht_chandef.width = NL80211_CHAN_WIDTH_160;
1128 break;
1129 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
1130 /* field is otherwise reserved */
1131 new_vht_chandef.center_freq2 =
1132 ieee80211_channel_to_frequency(
1133 wide_bw_chansw_ie->new_center_freq_seg1,
1134 new_band);
1135 new_vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
1136 break;
1137 }
1138 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
1139 new_vht_chandef.width == NL80211_CHAN_WIDTH_80P80)
1140 chandef_downgrade(&new_vht_chandef);
1141 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
1142 new_vht_chandef.width == NL80211_CHAN_WIDTH_160)
1143 chandef_downgrade(&new_vht_chandef);
1144 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
1145 new_vht_chandef.width > NL80211_CHAN_WIDTH_20)
1146 chandef_downgrade(&new_vht_chandef);
1147 }
1148
1149 /* if VHT data is there validate & use it */
1150 if (new_vht_chandef.chan) {
1151 if (!cfg80211_chandef_compatible(&new_vht_chandef,
1152 &new_chandef)) {
1153 sdata_info(sdata,
1154 "AP %pM CSA has inconsistent channel data, disconnecting\n",
1155 ifmgd->associated->bssid);
1156 ieee80211_queue_work(&local->hw,
1157 &ifmgd->csa_connection_drop_work);
1158 return;
1159 }
1160 new_chandef = new_vht_chandef;
1161 }
1162
85220d71
JB		 1163 if (!cfg80211_chandef_usable(local->hw.wiphy, &new_chandef,
1164 IEEE80211_CHAN_DISABLED)) {
1165 sdata_info(sdata,
1166 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1167 ifmgd->associated->bssid, new_freq,
1168 new_chandef.width, new_chandef.center_freq1,
1169 new_chandef.center_freq2);
1170 ieee80211_queue_work(&local->hw,
1171 &ifmgd->csa_connection_drop_work);
1172 return;
1173 }
1174
57eebdf3
JB		 1175 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
1176
b4f286a1 1177 if (local->use_chanctx) {
55de908a
JB		 1178 sdata_info(sdata,
1179 "not handling channel switch with channel contexts\n");
b4f286a1 1180 ieee80211_queue_work(&local->hw,
55de908a 1181 &ifmgd->csa_connection_drop_work);
246dc3fd 1182 return;
55de908a
JB		 1183 }
1184
b4f286a1 1185 mutex_lock(&local->chanctx_mtx);
55de908a 1186 if (WARN_ON(!rcu_access_pointer(sdata->vif.chanctx_conf))) {
b4f286a1 1187 mutex_unlock(&local->chanctx_mtx);
55de908a
JB		 1188 return;
1189 }
1190 chanctx = container_of(rcu_access_pointer(sdata->vif.chanctx_conf),
1191 struct ieee80211_chanctx, conf);
1192 if (chanctx->refcount > 1) {
1193 sdata_info(sdata,
1194 "channel switch with multiple interfaces on the same channel, disconnecting\n");
b4f286a1 1195 ieee80211_queue_work(&local->hw,
55de908a 1196 &ifmgd->csa_connection_drop_work);
b4f286a1 1197 mutex_unlock(&local->chanctx_mtx);
55de908a
JB		 1198 return;
1199 }
b4f286a1 1200 mutex_unlock(&local->chanctx_mtx);
55de908a 1201
85220d71 1202 local->csa_chandef = new_chandef;
55de908a 1203
b4f286a1
JB		 1204 if (mode)
1205 ieee80211_stop_queues_by_reason(&local->hw,
445ea4e8 1206 IEEE80211_MAX_QUEUE_MAP,
57eebdf3
JB		 1207 IEEE80211_QUEUE_STOP_REASON_CSA);
1208
b4f286a1 1209 if (local->ops->channel_switch) {
5ce6e438 1210 /* use driver's channel switch callback */
57eebdf3
JB		 1211 struct ieee80211_channel_switch ch_switch = {
1212 .timestamp = timestamp,
b4f286a1 1213 .block_tx = mode,
85220d71 1214 .chandef = new_chandef,
b4f286a1 1215 .count = count,
57eebdf3
JB		 1216 };
1217
b4f286a1 1218 drv_channel_switch(local, &ch_switch);
5ce6e438
JB		 1219 return;
1220 }
1221
1222 /* channel switch handled in software */
b4f286a1
JB		 1223 if (count <= 1)
1224 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
57eebdf3 1225 else
cc32abd4 1226 mod_timer(&ifmgd->chswitch_timer,
b4f286a1 1227 TU_TO_EXP_TIME(count * cbss->beacon_interval));
cc32abd4
JB		 1228}
1229
1ea6f9c0
JB		 1230static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1231 struct ieee80211_channel *channel,
1232 const u8 *country_ie, u8 country_ie_len,
1233 const u8 *pwr_constr_elem)
cc32abd4 1234{
04b7b2ff
JB		 1235 struct ieee80211_country_ie_triplet *triplet;
1236 int chan = ieee80211_frequency_to_channel(channel->center_freq);
1237 int i, chan_pwr, chan_increment, new_ap_level;
1238 bool have_chan_pwr = false;
cc32abd4 1239
04b7b2ff
JB		 1240 /* Invalid IE */
1241 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1ea6f9c0 1242 return 0;
cc32abd4 1243
04b7b2ff
JB		 1244 triplet = (void *)(country_ie + 3);
1245 country_ie_len -= 3;
1246
1247 switch (channel->band) {
1248 default:
1249 WARN_ON_ONCE(1);
1250 /* fall through */
1251 case IEEE80211_BAND_2GHZ:
1252 case IEEE80211_BAND_60GHZ:
1253 chan_increment = 1;
1254 break;
1255 case IEEE80211_BAND_5GHZ:
1256 chan_increment = 4;
1257 break;
cc32abd4 1258 }
04b7b2ff
JB		 1259
1260 /* find channel */
1261 while (country_ie_len >= 3) {
1262 u8 first_channel = triplet->chans.first_channel;
1263
1264 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1265 goto next;
1266
1267 for (i = 0; i < triplet->chans.num_channels; i++) {
1268 if (first_channel + i * chan_increment == chan) {
1269 have_chan_pwr = true;
1270 chan_pwr = triplet->chans.max_power;
1271 break;
1272 }
1273 }
1274 if (have_chan_pwr)
1275 break;
1276
1277 next:
1278 triplet++;
1279 country_ie_len -= 3;
1280 }
1281
1282 if (!have_chan_pwr)
1ea6f9c0 1283 return 0;
04b7b2ff
JB		 1284
1285 new_ap_level = max_t(int, 0, chan_pwr - *pwr_constr_elem);
1286
1ea6f9c0
JB		 1287 if (sdata->ap_power_level == new_ap_level)
1288 return 0;
04b7b2ff
JB		 1289
1290 sdata_info(sdata,
1291 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1292 new_ap_level, chan_pwr, *pwr_constr_elem,
1293 sdata->u.mgd.bssid);
1ea6f9c0
JB		 1294 sdata->ap_power_level = new_ap_level;
1295 if (__ieee80211_recalc_txpower(sdata))
1296 return BSS_CHANGED_TXPOWER;
1297 return 0;
cc32abd4
JB		 1298}
1299
965bedad
JB		 1300/* powersave */
1301static void ieee80211_enable_ps(struct ieee80211_local *local,
1302 struct ieee80211_sub_if_data *sdata)
1303{
1304 struct ieee80211_conf *conf = &local->hw.conf;
1305
d5edaedc
JB		 1306 /*
1307 * If we are scanning right now then the parameters will
1308 * take effect when scan finishes.
1309 */
fbe9c429 1310 if (local->scanning)
d5edaedc
JB		 1311 return;
1312
965bedad
JB		 1313 if (conf->dynamic_ps_timeout > 0 &&
1314 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
1315 mod_timer(&local->dynamic_ps_timer, jiffies +
1316 msecs_to_jiffies(conf->dynamic_ps_timeout));
1317 } else {
1318 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1319 ieee80211_send_nullfunc(local, sdata, 1);
375177bf 1320
2a13052f
JO		 1321 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1322 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
1323 return;
1324
1325 conf->flags |= IEEE80211_CONF_PS;
1326 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965bedad
JB		 1327 }
1328}
1329
1330static void ieee80211_change_ps(struct ieee80211_local *local)
1331{
1332 struct ieee80211_conf *conf = &local->hw.conf;
1333
1334 if (local->ps_sdata) {
965bedad
JB		 1335 ieee80211_enable_ps(local, local->ps_sdata);
1336 } else if (conf->flags & IEEE80211_CONF_PS) {
1337 conf->flags &= ~IEEE80211_CONF_PS;
1338 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1339 del_timer_sync(&local->dynamic_ps_timer);
1340 cancel_work_sync(&local->dynamic_ps_enable_work);
1341 }
1342}
1343
808118cb
JY		 1344static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1345{
1346 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1347 struct sta_info *sta = NULL;
c2c98fde 1348 bool authorized = false;
808118cb
JY		 1349
1350 if (!mgd->powersave)
1351 return false;
1352
05cb9108
JB		 1353 if (mgd->broken_ap)
1354 return false;
1355
808118cb
JY		 1356 if (!mgd->associated)
1357 return false;
1358
808118cb
JY		 1359 if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
1360 IEEE80211_STA_CONNECTION_POLL))
1361 return false;
1362
ce857888
AB		 1363 if (!sdata->vif.bss_conf.dtim_period)
1364 return false;
1365
808118cb
JY		 1366 rcu_read_lock();
1367 sta = sta_info_get(sdata, mgd->bssid);
1368 if (sta)
c2c98fde 1369 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
808118cb
JY		 1370 rcu_read_unlock();
1371
c2c98fde 1372 return authorized;
808118cb
JY		 1373}
1374
965bedad 1375/* need to hold RTNL or interface lock */
10f644a4 1376void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 1377{
1378 struct ieee80211_sub_if_data *sdata, *found = NULL;
1379 int count = 0;
195e294d 1380 int timeout;
965bedad
JB		 1381
1382 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
1383 local->ps_sdata = NULL;
1384 return;
1385 }
1386
1387 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 1388 if (!ieee80211_sdata_running(sdata))
965bedad 1389 continue;
8c7914de
RM		 1390 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1391 /* If an AP vif is found, then disable PS
1392 * by setting the count to zero thereby setting
1393 * ps_sdata to NULL.
1394 */
1395 count = 0;
1396 break;
1397 }
965bedad
JB		 1398 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1399 continue;
1400 found = sdata;
1401 count++;
1402 }
1403
808118cb 1404 if (count == 1 && ieee80211_powersave_allowed(found)) {
10f644a4
JB		 1405 s32 beaconint_us;
1406
1407 if (latency < 0)
ed77134b 1408 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
10f644a4
JB		 1409
1410 beaconint_us = ieee80211_tu_to_usec(
1411 found->vif.bss_conf.beacon_int);
1412
ff616381 1413 timeout = local->dynamic_ps_forced_timeout;
195e294d
JO		 1414 if (timeout < 0) {
1415 /*
ff616381
JO		 1416 * Go to full PSM if the user configures a very low
1417 * latency requirement.
0ab82b04
EP		 1418 * The 2000 second value is there for compatibility
1419 * until the PM_QOS_NETWORK_LATENCY is configured
1420 * with real values.
195e294d 1421 */
0ab82b04
EP		 1422 if (latency > (1900 * USEC_PER_MSEC) &&
1423 latency != (2000 * USEC_PER_SEC))
195e294d 1424 timeout = 0;
ff616381
JO		 1425 else
1426 timeout = 100;
195e294d 1427 }
09b85568 1428 local->hw.conf.dynamic_ps_timeout = timeout;
195e294d 1429
04fe2037 1430 if (beaconint_us > latency) {
10f644a4 1431 local->ps_sdata = NULL;
04fe2037 1432 } else {
04fe2037 1433 int maxslp = 1;
826262c3 1434 u8 dtimper = found->u.mgd.dtim_period;
56007a02
JB		 1435
1436 /* If the TIM IE is invalid, pretend the value is 1 */
1437 if (!dtimper)
1438 dtimper = 1;
1439 else if (dtimper > 1)
04fe2037
JB		 1440 maxslp = min_t(int, dtimper,
1441 latency / beaconint_us);
1442
9ccebe61 1443 local->hw.conf.max_sleep_period = maxslp;
56007a02 1444 local->hw.conf.ps_dtim_period = dtimper;
10f644a4 1445 local->ps_sdata = found;
04fe2037 1446 }
10f644a4 1447 } else {
965bedad 1448 local->ps_sdata = NULL;
10f644a4 1449 }
965bedad
JB		 1450
1451 ieee80211_change_ps(local);
1452}
1453
ab095877
EP		 1454void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1455{
1456 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1457
1458 if (sdata->vif.bss_conf.ps != ps_allowed) {
1459 sdata->vif.bss_conf.ps = ps_allowed;
1460 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1461 }
1462}
1463
965bedad
JB		 1464void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1465{
1466 struct ieee80211_local *local =
1467 container_of(work, struct ieee80211_local,
1468 dynamic_ps_disable_work);
1469
1470 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1471 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1472 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1473 }
1474
1475 ieee80211_wake_queues_by_reason(&local->hw,
445ea4e8 1476 IEEE80211_MAX_QUEUE_MAP,
965bedad
JB		 1477 IEEE80211_QUEUE_STOP_REASON_PS);
1478}
1479
1480void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1481{
1482 struct ieee80211_local *local =
1483 container_of(work, struct ieee80211_local,
1484 dynamic_ps_enable_work);
1485 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
5e34069c 1486 struct ieee80211_if_managed *ifmgd;
1ddc2867
RM		 1487 unsigned long flags;
1488 int q;
965bedad
JB		 1489
1490 /* can only happen when PS was just disabled anyway */
1491 if (!sdata)
1492 return;
1493
5e34069c
CL		 1494 ifmgd = &sdata->u.mgd;
1495
965bedad
JB		 1496 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1497 return;
1498
09b85568 1499 if (local->hw.conf.dynamic_ps_timeout > 0) {
77b7023a
AN		 1500 /* don't enter PS if TX frames are pending */
1501 if (drv_tx_frames_pending(local)) {
1ddc2867
RM		 1502 mod_timer(&local->dynamic_ps_timer, jiffies +
1503 msecs_to_jiffies(
1504 local->hw.conf.dynamic_ps_timeout));
1505 return;
1506 }
77b7023a
AN		 1507
1508 /*
1509 * transmission can be stopped by others which leads to
1510 * dynamic_ps_timer expiry. Postpone the ps timer if it
1511 * is not the actual idle state.
1512 */
1513 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1514 for (q = 0; q < local->hw.queues; q++) {
1515 if (local->queue_stop_reasons[q]) {
1516 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1517 flags);
1518 mod_timer(&local->dynamic_ps_timer, jiffies +
1519 msecs_to_jiffies(
1520 local->hw.conf.dynamic_ps_timeout));
1521 return;
1522 }
1523 }
1524 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1ddc2867 1525 }
1ddc2867 1526
375177bf 1527 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
9c38a8b4 1528 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
a1598383 1529 if (drv_tx_frames_pending(local)) {
e8306f98
VN		 1530 mod_timer(&local->dynamic_ps_timer, jiffies +
1531 msecs_to_jiffies(
1532 local->hw.conf.dynamic_ps_timeout));
a1598383 1533 } else {
e8306f98
VN		 1534 ieee80211_send_nullfunc(local, sdata, 1);
1535 /* Flush to get the tx status of nullfunc frame */
39ecc01d 1536 ieee80211_flush_queues(local, sdata);
e8306f98 1537 }
f3e85b9e
VN		 1538 }
1539
2a13052f
JO		 1540 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1541 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
375177bf
VN		 1542 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1543 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1544 local->hw.conf.flags |= IEEE80211_CONF_PS;
1545 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1546 }
965bedad
JB		 1547}
1548
1549void ieee80211_dynamic_ps_timer(unsigned long data)
1550{
1551 struct ieee80211_local *local = (void *) data;
1552
78f1a8b7 1553 if (local->quiescing || local->suspended)
5bb644a0
JB		 1554 return;
1555
42935eca 1556 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 1557}
1558
164eb02d
SW		 1559void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1560{
1561 struct delayed_work *delayed_work =
1562 container_of(work, struct delayed_work, work);
1563 struct ieee80211_sub_if_data *sdata =
1564 container_of(delayed_work, struct ieee80211_sub_if_data,
1565 dfs_cac_timer_work);
1566
1567 ieee80211_vif_release_channel(sdata);
1568
1569 cfg80211_cac_event(sdata->dev, NL80211_RADAR_CAC_FINISHED, GFP_KERNEL);
1570}
1571
60f8b39c 1572/* MLME */
7d25745d 1573static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
4ced3f74 1574 struct ieee80211_sub_if_data *sdata,
4a3cb702 1575 const u8 *wmm_param, size_t wmm_param_len)
f0706e82 1576{
f0706e82 1577 struct ieee80211_tx_queue_params params;
4ced3f74 1578 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1579 size_t left;
1580 int count;
4a3cb702
JB		 1581 const u8 *pos;
1582 u8 uapsd_queues = 0;
f0706e82 1583
e1b3ec1a 1584 if (!local->ops->conf_tx)
7d25745d 1585 return false;
e1b3ec1a 1586
32c5057b 1587 if (local->hw.queues < IEEE80211_NUM_ACS)
7d25745d 1588 return false;
3434fbd3
JB		 1589
1590 if (!wmm_param)
7d25745d 1591 return false;
3434fbd3 1592
f0706e82 1593 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
7d25745d 1594 return false;
ab13315a
KV		 1595
1596 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
dc41e4d4 1597 uapsd_queues = ifmgd->uapsd_queues;
ab13315a 1598
f0706e82 1599 count = wmm_param[6] & 0x0f;
46900298 1600 if (count == ifmgd->wmm_last_param_set)
7d25745d 1601 return false;
46900298 1602 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 1603
1604 pos = wmm_param + 8;
1605 left = wmm_param_len - 8;
1606
1607 memset(&params, 0, sizeof(params));
1608
00e96dec 1609 sdata->wmm_acm = 0;
f0706e82
JB		 1610 for (; left >= 4; left -= 4, pos += 4) {
1611 int aci = (pos[0] >> 5) & 0x03;
1612 int acm = (pos[0] >> 4) & 0x01;
ab13315a 1613 bool uapsd = false;
f0706e82
JB		 1614 int queue;
1615
1616 switch (aci) {
0eeb59fe 1617 case 1: /* AC_BK */
e100bb64 1618 queue = 3;
988c0f72 1619 if (acm)
00e96dec 1620 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV		 1621 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1622 uapsd = true;
f0706e82 1623 break;
0eeb59fe 1624 case 2: /* AC_VI */
e100bb64 1625 queue = 1;
988c0f72 1626 if (acm)
00e96dec 1627 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV		 1628 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1629 uapsd = true;
f0706e82 1630 break;
0eeb59fe 1631 case 3: /* AC_VO */
e100bb64 1632 queue = 0;
988c0f72 1633 if (acm)
00e96dec 1634 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV		 1635 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1636 uapsd = true;
f0706e82 1637 break;
0eeb59fe 1638 case 0: /* AC_BE */
f0706e82 1639 default:
e100bb64 1640 queue = 2;
988c0f72 1641 if (acm)
00e96dec 1642 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV		 1643 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1644 uapsd = true;
f0706e82
JB		 1645 break;
1646 }
1647
1648 params.aifs = pos[0] & 0x0f;
1649 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1650 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 1651 params.txop = get_unaligned_le16(pos + 2);
908f8d07 1652 params.acm = acm;
ab13315a
KV		 1653 params.uapsd = uapsd;
1654
bdcbd8e0
JB		 1655 mlme_dbg(sdata,
1656 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1657 queue, aci, acm,
1658 params.aifs, params.cw_min, params.cw_max,
1659 params.txop, params.uapsd);
f6f3def3
EP		 1660 sdata->tx_conf[queue] = params;
1661 if (drv_conf_tx(local, sdata, queue, &params))
bdcbd8e0
JB		 1662 sdata_err(sdata,
1663 "failed to set TX queue parameters for queue %d\n",
1664 queue);
f0706e82 1665 }
e1b3ec1a
SG		 1666
1667 /* enable WMM or activate new settings */
4ced3f74 1668 sdata->vif.bss_conf.qos = true;
7d25745d 1669 return true;
f0706e82
JB		 1670}
1671
925e64c3
SG		 1672static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1673{
1674 lockdep_assert_held(&sdata->local->mtx);
1675
1676 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1677 IEEE80211_STA_BEACON_POLL);
1678 ieee80211_run_deferred_scan(sdata->local);
1679}
1680
1681static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1682{
1683 mutex_lock(&sdata->local->mtx);
1684 __ieee80211_stop_poll(sdata);
1685 mutex_unlock(&sdata->local->mtx);
1686}
1687
7a5158ef
JB		 1688static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1689 u16 capab, bool erp_valid, u8 erp)
5628221c 1690{
bda3933a 1691 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 1692 u32 changed = 0;
7a5158ef
JB		 1693 bool use_protection;
1694 bool use_short_preamble;
1695 bool use_short_slot;
1696
1697 if (erp_valid) {
1698 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1699 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1700 } else {
1701 use_protection = false;
1702 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1703 }
1704
1705 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
55de908a 1706 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
43d35343 1707 use_short_slot = true;
5628221c 1708
471b3efd 1709 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 1710 bss_conf->use_cts_prot = use_protection;
1711 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 1712 }
7e9ed188 1713
d43c7b37 1714 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 1715 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 1716 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 1717 }
d9430a32 1718
7a5158ef 1719 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 1720 bss_conf->use_short_slot = use_short_slot;
1721 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 1722 }
1723
1724 return changed;
1725}
1726
f698d856 1727static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 1728 struct cfg80211_bss *cbss,
ae5eb026 1729 u32 bss_info_changed)
f0706e82 1730{
0c1ad2ca 1731 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 1732 struct ieee80211_local *local = sdata->local;
68542962 1733 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
d6f2da5b 1734
ae5eb026 1735 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 1736 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
50ae34a2 1737 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 1738
7ccc8bd7 1739 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
59c1ec2b 1740 beacon_loss_count * bss_conf->beacon_int));
7ccc8bd7 1741
0c1ad2ca
JB		 1742 sdata->u.mgd.associated = cbss;
1743 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 1744
17e4ec14
JM		 1745 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1746
488dd7b5 1747 if (sdata->vif.p2p) {
9caf0364 1748 const struct cfg80211_bss_ies *ies;
488dd7b5 1749
9caf0364
JB		 1750 rcu_read_lock();
1751 ies = rcu_dereference(cbss->ies);
1752 if (ies) {
9caf0364
JB		 1753 int ret;
1754
1755 ret = cfg80211_get_p2p_attr(
1756 ies->data, ies->len,
1757 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
67baf663
JD		 1758 (u8 *) &bss_conf->p2p_noa_attr,
1759 sizeof(bss_conf->p2p_noa_attr));
9caf0364 1760 if (ret >= 2) {
67baf663
JD		 1761 sdata->u.mgd.p2p_noa_index =
1762 bss_conf->p2p_noa_attr.index;
9caf0364 1763 bss_info_changed |= BSS_CHANGED_P2P_PS;
9caf0364 1764 }
488dd7b5 1765 }
9caf0364 1766 rcu_read_unlock();
488dd7b5
JB		 1767 }
1768
b291ba11 1769 /* just to be sure */
925e64c3 1770 ieee80211_stop_poll(sdata);
b291ba11 1771
9ac19a90 1772 ieee80211_led_assoc(local, 1);
9306102e 1773
c65dd147 1774 if (sdata->u.mgd.assoc_data->have_beacon) {
826262c3
JB		 1775 /*
1776 * If the AP is buggy we may get here with no DTIM period
1777 * known, so assume it's 1 which is the only safe assumption
1778 * in that case, although if the TIM IE is broken powersave
1779 * probably just won't work at all.
1780 */
1781 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
c65dd147 1782 bss_info_changed |= BSS_CHANGED_DTIM_PERIOD;
826262c3 1783 } else {
e5b900d2 1784 bss_conf->dtim_period = 0;
826262c3 1785 }
e5b900d2 1786
68542962 1787 bss_conf->assoc = 1;
9cef8737 1788
a97c13c3 1789 /* Tell the driver to monitor connection quality (if supported) */
ea086359 1790 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
68542962 1791 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 1792 bss_info_changed |= BSS_CHANGED_CQM;
1793
68542962 1794 /* Enable ARP filtering */
0f19b41e 1795 if (bss_conf->arp_addr_cnt)
68542962 1796 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
68542962 1797
ae5eb026 1798 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 1799
056508dc
JB		 1800 mutex_lock(&local->iflist_mtx);
1801 ieee80211_recalc_ps(local, -1);
1802 mutex_unlock(&local->iflist_mtx);
e0cb686f 1803
04ecd257 1804 ieee80211_recalc_smps(sdata);
ab095877
EP		 1805 ieee80211_recalc_ps_vif(sdata);
1806
9ac19a90 1807 netif_carrier_on(sdata->dev);
f0706e82
JB		 1808}
1809
e69e95db 1810static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
37ad3888
JB		 1811 u16 stype, u16 reason, bool tx,
1812 u8 *frame_buf)
aa458d17 1813{
46900298 1814 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17 1815 struct ieee80211_local *local = sdata->local;
3cc5240b 1816 u32 changed = 0;
aa458d17 1817
8d61ffa5 1818 sdata_assert_lock(sdata);
77fdaa12 1819
37ad3888
JB		 1820 if (WARN_ON_ONCE(tx && !frame_buf))
1821 return;
1822
b291ba11
JB		 1823 if (WARN_ON(!ifmgd->associated))
1824 return;
1825
79543d8e
DS		 1826 ieee80211_stop_poll(sdata);
1827
77fdaa12 1828 ifmgd->associated = NULL;
aa458d17
TW		 1829 netif_carrier_off(sdata->dev);
1830
88bc40e8
EP		 1831 /*
1832 * if we want to get out of ps before disassoc (why?) we have
1833 * to do it before sending disassoc, as otherwise the null-packet
1834 * won't be valid.
1835 */
1836 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1837 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1838 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1839 }
1840 local->ps_sdata = NULL;
1841
ab095877
EP		 1842 /* disable per-vif ps */
1843 ieee80211_recalc_ps_vif(sdata);
1844
f823981e
EP		 1845 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1846 if (tx)
39ecc01d 1847 ieee80211_flush_queues(local, sdata);
f823981e 1848
37ad3888
JB		 1849 /* deauthenticate/disassociate now */
1850 if (tx || frame_buf)
88a9e31c
EP		 1851 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
1852 reason, tx, frame_buf);
37ad3888
JB		 1853
1854 /* flush out frame */
1855 if (tx)
39ecc01d 1856 ieee80211_flush_queues(local, sdata);
37ad3888 1857
88a9e31c
EP		 1858 /* clear bssid only after building the needed mgmt frames */
1859 memset(ifmgd->bssid, 0, ETH_ALEN);
1860
37ad3888 1861 /* remove AP and TDLS peers */
051007d9 1862 sta_info_flush_defer(sdata);
37ad3888
JB		 1863
1864 /* finally reset all BSS / config parameters */
f5e5bf25
TW		 1865 changed |= ieee80211_reset_erp_info(sdata);
1866
f5e5bf25 1867 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 1868 changed |= BSS_CHANGED_ASSOC;
1869 sdata->vif.bss_conf.assoc = false;
f5e5bf25 1870
67baf663
JD		 1871 ifmgd->p2p_noa_index = -1;
1872 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
1873 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
488dd7b5 1874
dd5ecfea 1875 /* on the next assoc, re-program HT/VHT parameters */
ef96a842
BG		 1876 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1877 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
dd5ecfea
JB		 1878 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
1879 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
413ad50a 1880
1ea6f9c0 1881 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
a8302de9 1882
520eb820
KV		 1883 del_timer_sync(&local->dynamic_ps_timer);
1884 cancel_work_sync(&local->dynamic_ps_enable_work);
1885
68542962 1886 /* Disable ARP filtering */
0f19b41e 1887 if (sdata->vif.bss_conf.arp_addr_cnt)
68542962 1888 changed |= BSS_CHANGED_ARP_FILTER;
68542962 1889
3abead59
JB		 1890 sdata->vif.bss_conf.qos = false;
1891 changed |= BSS_CHANGED_QOS;
1892
0aaffa9b
JB		 1893 /* The BSSID (not really interesting) and HT changed */
1894 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 1895 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 1896
3abead59
JB		 1897 /* disassociated - set to defaults now */
1898 ieee80211_set_wmm_default(sdata, false);
1899
b9dcf712
JB		 1900 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1901 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1902 del_timer_sync(&sdata->u.mgd.timer);
1903 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2d9957cc 1904
826262c3
JB		 1905 sdata->vif.bss_conf.dtim_period = 0;
1906
028e8da0
JB		 1907 ifmgd->flags = 0;
1908 ieee80211_vif_release_channel(sdata);
aa458d17 1909}
f0706e82 1910
3cf335d5
KV		 1911void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1912 struct ieee80211_hdr *hdr)
1913{
1914 /*
1915 * We can postpone the mgd.timer whenever receiving unicast frames
1916 * from AP because we know that the connection is working both ways
1917 * at that time. But multicast frames (and hence also beacons) must
1918 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 1919 * data idle periods for sending the periodic probe request to the
1920 * AP we're connected to.
3cf335d5 1921 */
b291ba11
JB		 1922 if (is_multicast_ether_addr(hdr->addr1))
1923 return;
1924
be099e82 1925 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 1926}
f0706e82 1927
4e5ff376
FF		 1928static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1929{
1930 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
133d40f9 1931 struct ieee80211_local *local = sdata->local;
4e5ff376 1932
133d40f9 1933 mutex_lock(&local->mtx);
4e5ff376 1934 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
133d40f9
SG		 1935 IEEE80211_STA_CONNECTION_POLL))) {
1936 mutex_unlock(&local->mtx);
1937 return;
1938 }
4e5ff376 1939
925e64c3 1940 __ieee80211_stop_poll(sdata);
133d40f9
SG		 1941
1942 mutex_lock(&local->iflist_mtx);
1943 ieee80211_recalc_ps(local, -1);
1944 mutex_unlock(&local->iflist_mtx);
4e5ff376
FF		 1945
1946 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
133d40f9 1947 goto out;
4e5ff376
FF		 1948
1949 /*
1950 * We've received a probe response, but are not sure whether
1951 * we have or will be receiving any beacons or data, so let's
1952 * schedule the timers again, just in case.
1953 */
1954 ieee80211_sta_reset_beacon_monitor(sdata);
1955
1956 mod_timer(&ifmgd->conn_mon_timer,
1957 round_jiffies_up(jiffies +
1958 IEEE80211_CONNECTION_IDLE_TIME));
133d40f9 1959out:
133d40f9 1960 mutex_unlock(&local->mtx);
4e5ff376
FF		 1961}
1962
1963void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
04ac3c0e 1964 struct ieee80211_hdr *hdr, bool ack)
4e5ff376 1965{
75706d0e 1966 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF		 1967 return;
1968
4e5ff376
FF		 1969 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1970 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e 1971 if (ack)
cab1c7fd 1972 ieee80211_sta_reset_conn_monitor(sdata);
04ac3c0e
FF		 1973 else
1974 sdata->u.mgd.nullfunc_failed = true;
4e5ff376 1975 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
cab1c7fd 1976 return;
4e5ff376 1977 }
cab1c7fd
WD		 1978
1979 if (ack)
1980 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF		 1981}
1982
a43abf29
ML		 1983static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1984{
1985 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1986 const u8 *ssid;
f01a067d 1987 u8 *dst = ifmgd->associated->bssid;
180205bd 1988 u8 unicast_limit = max(1, max_probe_tries - 3);
f01a067d
LR		 1989
1990 /*
1991 * Try sending broadcast probe requests for the last three
1992 * probe requests after the first ones failed since some
1993 * buggy APs only support broadcast probe requests.
1994 */
1995 if (ifmgd->probe_send_count >= unicast_limit)
1996 dst = NULL;
a43abf29 1997
4e5ff376
FF		 1998 /*
1999 * When the hardware reports an accurate Tx ACK status, it's
2000 * better to send a nullfunc frame instead of a probe request,
2001 * as it will kick us off the AP quickly if we aren't associated
2002 * anymore. The timeout will be reset if the frame is ACKed by
2003 * the AP.
2004 */
992e68bf
SD		 2005 ifmgd->probe_send_count++;
2006
04ac3c0e
FF		 2007 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2008 ifmgd->nullfunc_failed = false;
4e5ff376 2009 ieee80211_send_nullfunc(sdata->local, sdata, 0);
04ac3c0e 2010 } else {
88c868c4
SG		 2011 int ssid_len;
2012
9caf0364 2013 rcu_read_lock();
4e5ff376 2014 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
88c868c4
SG		 2015 if (WARN_ON_ONCE(ssid == NULL))
2016 ssid_len = 0;
2017 else
2018 ssid_len = ssid[1];
2019
2020 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
1672c0e3 2021 0, (u32) -1, true, 0,
55de908a 2022 ifmgd->associated->channel, false);
9caf0364 2023 rcu_read_unlock();
4e5ff376 2024 }
a43abf29 2025
180205bd 2026 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
8d61ffa5 2027 run_again(sdata, ifmgd->probe_timeout);
f69b9c79 2028 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
39ecc01d 2029 ieee80211_flush_queues(sdata->local, sdata);
a43abf29
ML		 2030}
2031
b291ba11
JB		 2032static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2033 bool beacon)
04de8381 2034{
04de8381 2035 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 2036 bool already = false;
34bfc411 2037
9607e6b6 2038 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 2039 return;
2040
8d61ffa5 2041 sdata_lock(sdata);
77fdaa12
JB		 2042
2043 if (!ifmgd->associated)
2044 goto out;
2045
133d40f9
SG		 2046 mutex_lock(&sdata->local->mtx);
2047
2048 if (sdata->local->tmp_channel || sdata->local->scanning) {
2049 mutex_unlock(&sdata->local->mtx);
2050 goto out;
2051 }
2052
a13fbe54 2053 if (beacon) {
bdcbd8e0 2054 mlme_dbg_ratelimited(sdata,
59c1ec2b
BG		 2055 "detected beacon loss from AP (missed %d beacons) - probing\n",
2056 beacon_loss_count);
bdcbd8e0 2057
a13fbe54
BG		 2058 ieee80211_cqm_rssi_notify(&sdata->vif,
2059 NL80211_CQM_RSSI_BEACON_LOSS_EVENT,
2060 GFP_KERNEL);
2061 }
04de8381 2062
b291ba11
JB		 2063 /*
2064 * The driver/our work has already reported this event or the
2065 * connection monitoring has kicked in and we have already sent
2066 * a probe request. Or maybe the AP died and the driver keeps
2067 * reporting until we disassociate...
2068 *
2069 * In either case we have to ignore the current call to this
2070 * function (except for setting the correct probe reason bit)
2071 * because otherwise we would reset the timer every time and
2072 * never check whether we received a probe response!
2073 */
2074 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2075 IEEE80211_STA_CONNECTION_POLL))
2076 already = true;
2077
2078 if (beacon)
2079 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
2080 else
2081 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2082
133d40f9
SG		 2083 mutex_unlock(&sdata->local->mtx);
2084
b291ba11
JB		 2085 if (already)
2086 goto out;
2087
4e751843
JB		 2088 mutex_lock(&sdata->local->iflist_mtx);
2089 ieee80211_recalc_ps(sdata->local, -1);
2090 mutex_unlock(&sdata->local->iflist_mtx);
2091
a43abf29
ML		 2092 ifmgd->probe_send_count = 0;
2093 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12 2094 out:
8d61ffa5 2095 sdata_unlock(sdata);
04de8381
KV		 2096}
2097
a619a4c0
JO		 2098struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2099 struct ieee80211_vif *vif)
2100{
2101 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2102 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d9b3b28b 2103 struct cfg80211_bss *cbss;
a619a4c0
JO		 2104 struct sk_buff *skb;
2105 const u8 *ssid;
88c868c4 2106 int ssid_len;
a619a4c0
JO		 2107
2108 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2109 return NULL;
2110
8d61ffa5 2111 sdata_assert_lock(sdata);
a619a4c0 2112
d9b3b28b
EP		 2113 if (ifmgd->associated)
2114 cbss = ifmgd->associated;
2115 else if (ifmgd->auth_data)
2116 cbss = ifmgd->auth_data->bss;
2117 else if (ifmgd->assoc_data)
2118 cbss = ifmgd->assoc_data->bss;
2119 else
a619a4c0
JO		 2120 return NULL;
2121
9caf0364 2122 rcu_read_lock();
d9b3b28b 2123 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
88c868c4
SG		 2124 if (WARN_ON_ONCE(ssid == NULL))
2125 ssid_len = 0;
2126 else
2127 ssid_len = ssid[1];
2128
d9b3b28b 2129 skb = ieee80211_build_probe_req(sdata, cbss->bssid,
55de908a 2130 (u32) -1, cbss->channel,
6b77863b 2131 ssid + 2, ssid_len,
85a237fe 2132 NULL, 0, true);
9caf0364 2133 rcu_read_unlock();
a619a4c0
JO		 2134
2135 return skb;
2136}
2137EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2138
eef9e54c 2139static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
1e4dcd01
JO		 2140{
2141 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 2142 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
1e4dcd01 2143
8d61ffa5 2144 sdata_lock(sdata);
1e4dcd01 2145 if (!ifmgd->associated) {
8d61ffa5 2146 sdata_unlock(sdata);
1e4dcd01
JO		 2147 return;
2148 }
2149
37ad3888
JB		 2150 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2151 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
eef9e54c 2152 true, frame_buf);
882a7c69 2153 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
5b36ebd8 2154 ieee80211_wake_queues_by_reason(&sdata->local->hw,
445ea4e8 2155 IEEE80211_MAX_QUEUE_MAP,
5b36ebd8 2156 IEEE80211_QUEUE_STOP_REASON_CSA);
7da7cc1d 2157
6ff57cf8
JB		 2158 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
2159 IEEE80211_DEAUTH_FRAME_LEN);
8d61ffa5 2160 sdata_unlock(sdata);
1e4dcd01
JO		 2161}
2162
cc74c0c7 2163static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 2164{
2165 struct ieee80211_sub_if_data *sdata =
2166 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 2167 u.mgd.beacon_connection_loss_work);
a85e1d55
PS		 2168 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2169 struct sta_info *sta;
2170
2171 if (ifmgd->associated) {
30fa9047 2172 rcu_read_lock();
a85e1d55
PS		 2173 sta = sta_info_get(sdata, ifmgd->bssid);
2174 if (sta)
2175 sta->beacon_loss_count++;
30fa9047 2176 rcu_read_unlock();
a85e1d55 2177 }
b291ba11 2178
682bd38b 2179 if (ifmgd->connection_loss) {
882a7c69
JB		 2180 sdata_info(sdata, "Connection to AP %pM lost\n",
2181 ifmgd->bssid);
eef9e54c 2182 __ieee80211_disconnect(sdata);
882a7c69 2183 } else {
1e4dcd01 2184 ieee80211_mgd_probe_ap(sdata, true);
882a7c69
JB		 2185 }
2186}
2187
2188static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2189{
2190 struct ieee80211_sub_if_data *sdata =
2191 container_of(work, struct ieee80211_sub_if_data,
2192 u.mgd.csa_connection_drop_work);
2193
eef9e54c 2194 __ieee80211_disconnect(sdata);
b291ba11
JB		 2195}
2196
04de8381
KV		 2197void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2198{
2199 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 2200 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 2201
b5878a2d
JB		 2202 trace_api_beacon_loss(sdata);
2203
682bd38b 2204 sdata->u.mgd.connection_loss = false;
1e4dcd01 2205 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 2206}
2207EXPORT_SYMBOL(ieee80211_beacon_loss);
2208
1e4dcd01
JO		 2209void ieee80211_connection_loss(struct ieee80211_vif *vif)
2210{
2211 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2212 struct ieee80211_hw *hw = &sdata->local->hw;
2213
b5878a2d
JB		 2214 trace_api_connection_loss(sdata);
2215
682bd38b 2216 sdata->u.mgd.connection_loss = true;
1e4dcd01
JO		 2217 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2218}
2219EXPORT_SYMBOL(ieee80211_connection_loss);
2220
2221
66e67e41
JB		 2222static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2223 bool assoc)
2224{
2225 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2226
8d61ffa5 2227 sdata_assert_lock(sdata);
66e67e41 2228
66e67e41
JB		 2229 if (!assoc) {
2230 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2231
2232 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2233 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
028e8da0 2234 sdata->u.mgd.flags = 0;
55de908a 2235 ieee80211_vif_release_channel(sdata);
66e67e41
JB		 2236 }
2237
5b112d3d 2238 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
66e67e41
JB		 2239 kfree(auth_data);
2240 sdata->u.mgd.auth_data = NULL;
2241}
2242
2243static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2244 struct ieee80211_mgmt *mgmt, size_t len)
2245{
1672c0e3 2246 struct ieee80211_local *local = sdata->local;
66e67e41
JB		 2247 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2248 u8 *pos;
2249 struct ieee802_11_elems elems;
1672c0e3 2250 u32 tx_flags = 0;
66e67e41
JB		 2251
2252 pos = mgmt->u.auth.variable;
b2e506bf 2253 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
66e67e41
JB		 2254 if (!elems.challenge)
2255 return;
2256 auth_data->expected_transaction = 4;
a1845fc7 2257 drv_mgd_prepare_tx(sdata->local, sdata);
1672c0e3
JB		 2258 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2259 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2260 IEEE80211_TX_INTFL_MLME_CONN_TX;
700e8ea6 2261 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
66e67e41
JB		 2262 elems.challenge - 2, elems.challenge_len + 2,
2263 auth_data->bss->bssid, auth_data->bss->bssid,
2264 auth_data->key, auth_data->key_len,
1672c0e3 2265 auth_data->key_idx, tx_flags);
66e67e41
JB		 2266}
2267
8d61ffa5
JB		 2268static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2269 struct ieee80211_mgmt *mgmt, size_t len)
66e67e41
JB		 2270{
2271 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2272 u8 bssid[ETH_ALEN];
2273 u16 auth_alg, auth_transaction, status_code;
2274 struct sta_info *sta;
2275
8d61ffa5 2276 sdata_assert_lock(sdata);
66e67e41
JB		 2277
2278 if (len < 24 + 6)
8d61ffa5 2279 return;
66e67e41
JB		 2280
2281 if (!ifmgd->auth_data || ifmgd->auth_data->done)
8d61ffa5 2282 return;
66e67e41
JB		 2283
2284 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2285
b203ca39 2286 if (!ether_addr_equal(bssid, mgmt->bssid))
8d61ffa5 2287 return;
66e67e41
JB		 2288
2289 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2290 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2291 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2292
2293 if (auth_alg != ifmgd->auth_data->algorithm ||
0f4126e8
JM		 2294 auth_transaction != ifmgd->auth_data->expected_transaction) {
2295 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2296 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2297 auth_transaction,
2298 ifmgd->auth_data->expected_transaction);
8d61ffa5 2299 return;
0f4126e8 2300 }
66e67e41
JB		 2301
2302 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2303 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2304 mgmt->sa, status_code);
dac211ec 2305 ieee80211_destroy_auth_data(sdata, false);
6ff57cf8 2306 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
8d61ffa5 2307 return;
66e67e41
JB		 2308 }
2309
2310 switch (ifmgd->auth_data->algorithm) {
2311 case WLAN_AUTH_OPEN:
2312 case WLAN_AUTH_LEAP:
2313 case WLAN_AUTH_FT:
6b8ece3a 2314 case WLAN_AUTH_SAE:
66e67e41
JB		 2315 break;
2316 case WLAN_AUTH_SHARED_KEY:
2317 if (ifmgd->auth_data->expected_transaction != 4) {
2318 ieee80211_auth_challenge(sdata, mgmt, len);
2319 /* need another frame */
8d61ffa5 2320 return;
66e67e41
JB		 2321 }
2322 break;
2323 default:
2324 WARN_ONCE(1, "invalid auth alg %d",
2325 ifmgd->auth_data->algorithm);
8d61ffa5 2326 return;
66e67e41
JB		 2327 }
2328
bdcbd8e0 2329 sdata_info(sdata, "authenticated\n");
66e67e41
JB		 2330 ifmgd->auth_data->done = true;
2331 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
89afe614 2332 ifmgd->auth_data->timeout_started = true;
8d61ffa5 2333 run_again(sdata, ifmgd->auth_data->timeout);
66e67e41 2334
6b8ece3a
JM		 2335 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2336 ifmgd->auth_data->expected_transaction != 2) {
2337 /*
2338 * Report auth frame to user space for processing since another
2339 * round of Authentication frames is still needed.
2340 */
6ff57cf8 2341 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
8d61ffa5 2342 return;
6b8ece3a
JM		 2343 }
2344
66e67e41
JB		 2345 /* move station state to auth */
2346 mutex_lock(&sdata->local->sta_mtx);
2347 sta = sta_info_get(sdata, bssid);
2348 if (!sta) {
2349 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2350 goto out_err;
2351 }
2352 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
bdcbd8e0 2353 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
66e67e41
JB		 2354 goto out_err;
2355 }
2356 mutex_unlock(&sdata->local->sta_mtx);
2357
6ff57cf8 2358 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
8d61ffa5 2359 return;
66e67e41
JB		 2360 out_err:
2361 mutex_unlock(&sdata->local->sta_mtx);
2362 /* ignore frame -- wait for timeout */
66e67e41
JB		 2363}
2364
2365
8d61ffa5
JB		 2366static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2367 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2368{
46900298 2369 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 2370 const u8 *bssid = NULL;
f0706e82
JB		 2371 u16 reason_code;
2372
8d61ffa5 2373 sdata_assert_lock(sdata);
66e67e41 2374
f4ea83dd 2375 if (len < 24 + 2)
8d61ffa5 2376 return;
f0706e82 2377
66e67e41 2378 if (!ifmgd->associated ||
b203ca39 2379 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
8d61ffa5 2380 return;
77fdaa12 2381
0c1ad2ca 2382 bssid = ifmgd->associated->bssid;
f0706e82
JB		 2383
2384 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2385
bdcbd8e0
JB		 2386 sdata_info(sdata, "deauthenticated from %pM (Reason: %u)\n",
2387 bssid, reason_code);
77fdaa12 2388
37ad3888
JB		 2389 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2390
6ff57cf8 2391 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
f0706e82
JB		 2392}
2393
2394
8d61ffa5
JB		 2395static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2396 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2397{
46900298 2398 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 2399 u16 reason_code;
2400
8d61ffa5 2401 sdata_assert_lock(sdata);
77fdaa12 2402
66e67e41 2403 if (len < 24 + 2)
8d61ffa5 2404 return;
77fdaa12 2405
66e67e41 2406 if (!ifmgd->associated ||
b203ca39 2407 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
8d61ffa5 2408 return;
f0706e82
JB		 2409
2410 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2411
bdcbd8e0
JB		 2412 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2413 mgmt->sa, reason_code);
f0706e82 2414
37ad3888
JB		 2415 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2416
6ff57cf8 2417 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
f0706e82
JB		 2418}
2419
c74d084f
CL		 2420static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2421 u8 *supp_rates, unsigned int supp_rates_len,
2422 u32 *rates, u32 *basic_rates,
2423 bool *have_higher_than_11mbit,
2424 int *min_rate, int *min_rate_index)
2425{
2426 int i, j;
2427
2428 for (i = 0; i < supp_rates_len; i++) {
2429 int rate = (supp_rates[i] & 0x7f) * 5;
2430 bool is_basic = !!(supp_rates[i] & 0x80);
2431
2432 if (rate > 110)
2433 *have_higher_than_11mbit = true;
2434
2435 /*
2436 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2437 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2438 *
2439 * Note: Even through the membership selector and the basic
2440 * rate flag share the same bit, they are not exactly
2441 * the same.
2442 */
2443 if (!!(supp_rates[i] & 0x80) &&
2444 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2445 continue;
2446
2447 for (j = 0; j < sband->n_bitrates; j++) {
2448 if (sband->bitrates[j].bitrate == rate) {
2449 *rates |= BIT(j);
2450 if (is_basic)
2451 *basic_rates |= BIT(j);
2452 if (rate < *min_rate) {
2453 *min_rate = rate;
2454 *min_rate_index = j;
2455 }
2456 break;
2457 }
2458 }
2459 }
2460}
f0706e82 2461
66e67e41
JB		 2462static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2463 bool assoc)
2464{
2465 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2466
8d61ffa5 2467 sdata_assert_lock(sdata);
66e67e41 2468
66e67e41
JB		 2469 if (!assoc) {
2470 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2471
2472 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2473 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
028e8da0 2474 sdata->u.mgd.flags = 0;
55de908a 2475 ieee80211_vif_release_channel(sdata);
66e67e41
JB		 2476 }
2477
2478 kfree(assoc_data);
2479 sdata->u.mgd.assoc_data = NULL;
2480}
2481
2482static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2483 struct cfg80211_bss *cbss,
af6b6374 2484 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2485{
46900298 2486 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 2487 struct ieee80211_local *local = sdata->local;
8318d78a 2488 struct ieee80211_supported_band *sband;
f0706e82 2489 struct sta_info *sta;
af6b6374 2490 u8 *pos;
af6b6374 2491 u16 capab_info, aid;
f0706e82 2492 struct ieee802_11_elems elems;
bda3933a 2493 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
ae5eb026 2494 u32 changed = 0;
c74d084f 2495 int err;
f0706e82 2496
af6b6374 2497 /* AssocResp and ReassocResp have identical structure */
f0706e82 2498
f0706e82 2499 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 2500 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 2501
1dd84aa2 2502 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
bdcbd8e0
JB		 2503 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2504 aid);
1dd84aa2
JB		 2505 aid &= ~(BIT(15) | BIT(14));
2506
05cb9108
JB		 2507 ifmgd->broken_ap = false;
2508
2509 if (aid == 0 || aid > IEEE80211_MAX_AID) {
bdcbd8e0
JB		 2510 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2511 aid);
05cb9108
JB		 2512 aid = 0;
2513 ifmgd->broken_ap = true;
2514 }
2515
af6b6374 2516 pos = mgmt->u.assoc_resp.variable;
b2e506bf 2517 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
af6b6374 2518
f0706e82 2519 if (!elems.supp_rates) {
bdcbd8e0 2520 sdata_info(sdata, "no SuppRates element in AssocResp\n");
af6b6374 2521 return false;
f0706e82
JB		 2522 }
2523
46900298 2524 ifmgd->aid = aid;
f0706e82 2525
30eb1dc2
JB		 2526 /*
2527 * We previously checked these in the beacon/probe response, so
2528 * they should be present here. This is just a safety net.
2529 */
2530 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2531 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2532 sdata_info(sdata,
2533 "HT AP is missing WMM params or HT capability/operation in AssocResp\n");
2534 return false;
2535 }
2536
2537 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2538 (!elems.vht_cap_elem || !elems.vht_operation)) {
2539 sdata_info(sdata,
2540 "VHT AP is missing VHT capability/operation in AssocResp\n");
2541 return false;
2542 }
2543
2a33bee2
GE		 2544 mutex_lock(&sdata->local->sta_mtx);
2545 /*
2546 * station info was already allocated and inserted before
2547 * the association and should be available to us
2548 */
7852e361 2549 sta = sta_info_get(sdata, cbss->bssid);
2a33bee2
GE		 2550 if (WARN_ON(!sta)) {
2551 mutex_unlock(&sdata->local->sta_mtx);
af6b6374 2552 return false;
77fdaa12 2553 }
05e5e883 2554
55de908a 2555 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
f709fc69 2556
30eb1dc2 2557 /* Set up internal HT/VHT capabilities */
a8243b72 2558 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
ef96a842 2559 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
e1a0c6b3 2560 elems.ht_cap_elem, sta);
64f68e5d 2561
818255ea
MP		 2562 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2563 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
4a34215e 2564 elems.vht_cap_elem, sta);
818255ea 2565
30eb1dc2
JB		 2566 /*
2567 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
2568 * in their association response, so ignore that data for our own
2569 * configuration. If it changed since the last beacon, we'll get the
2570 * next beacon and update then.
2571 */
1128958d 2572
bee7f586
JB		 2573 /*
2574 * If an operating mode notification IE is present, override the
2575 * NSS calculation (that would be done in rate_control_rate_init())
2576 * and use the # of streams from that element.
2577 */
2578 if (elems.opmode_notif &&
2579 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
2580 u8 nss;
2581
2582 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
2583 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
2584 nss += 1;
2585 sta->sta.rx_nss = nss;
2586 }
2587
4b7679a5 2588 rate_control_rate_init(sta);
f0706e82 2589
46900298 2590 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
c2c98fde 2591 set_sta_flag(sta, WLAN_STA_MFP);
5394af4d 2592
ddf4ac53 2593 if (elems.wmm_param)
c2c98fde 2594 set_sta_flag(sta, WLAN_STA_WME);
ddf4ac53 2595
3e4d40fa 2596 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
c8987876
JB		 2597 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2598 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2599 if (err) {
bdcbd8e0
JB		 2600 sdata_info(sdata,
2601 "failed to move station %pM to desired state\n",
2602 sta->sta.addr);
c8987876
JB		 2603 WARN_ON(__sta_info_destroy(sta));
2604 mutex_unlock(&sdata->local->sta_mtx);
2605 return false;
2606 }
2607
7852e361 2608 mutex_unlock(&sdata->local->sta_mtx);
ddf4ac53 2609
f2176d72
JO		 2610 /*
2611 * Always handle WMM once after association regardless
2612 * of the first value the AP uses. Setting -1 here has
2613 * that effect because the AP values is an unsigned
2614 * 4-bit value.
2615 */
2616 ifmgd->wmm_last_param_set = -1;
2617
ddf4ac53 2618 if (elems.wmm_param)
4ced3f74 2619 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 2620 elems.wmm_param_len);
aa837e1d 2621 else
3abead59
JB		 2622 ieee80211_set_wmm_default(sdata, false);
2623 changed |= BSS_CHANGED_QOS;
f0706e82 2624
60f8b39c
JB		 2625 /* set AID and assoc capability,
2626 * ieee80211_set_associated() will tell the driver */
2627 bss_conf->aid = aid;
2628 bss_conf->assoc_capability = capab_info;
0c1ad2ca 2629 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 2630
d524215f
FF		 2631 /*
2632 * If we're using 4-addr mode, let the AP know that we're
2633 * doing so, so that it can create the STA VLAN on its side
2634 */
2635 if (ifmgd->use_4addr)
2636 ieee80211_send_4addr_nullfunc(local, sdata);
2637
15b7b062 2638 /*
b291ba11
JB		 2639 * Start timer to probe the connection to the AP now.
2640 * Also start the timer that will detect beacon loss.
15b7b062 2641 */
b291ba11 2642 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 2643 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 2644
af6b6374 2645 return true;
f0706e82
JB		 2646}
2647
8d61ffa5
JB		 2648static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2649 struct ieee80211_mgmt *mgmt,
2650 size_t len)
66e67e41
JB		 2651{
2652 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2653 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2654 u16 capab_info, status_code, aid;
2655 struct ieee802_11_elems elems;
2656 u8 *pos;
2657 bool reassoc;
8d61ffa5 2658 struct cfg80211_bss *bss;
66e67e41 2659
8d61ffa5 2660 sdata_assert_lock(sdata);
66e67e41
JB		 2661
2662 if (!assoc_data)
8d61ffa5 2663 return;
b203ca39 2664 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
8d61ffa5 2665 return;
66e67e41
JB		 2666
2667 /*
2668 * AssocResp and ReassocResp have identical structure, so process both
2669 * of them in this function.
2670 */
2671
2672 if (len < 24 + 6)
8d61ffa5 2673 return;
66e67e41
JB		 2674
2675 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2676 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2677 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2678 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2679
bdcbd8e0
JB		 2680 sdata_info(sdata,
2681 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2682 reassoc ? "Rea" : "A", mgmt->sa,
2683 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
66e67e41
JB		 2684
2685 pos = mgmt->u.assoc_resp.variable;
b2e506bf 2686 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
66e67e41
JB		 2687
2688 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
79ba1d89
JB		 2689 elems.timeout_int &&
2690 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
66e67e41 2691 u32 tu, ms;
79ba1d89 2692 tu = le32_to_cpu(elems.timeout_int->value);
66e67e41 2693 ms = tu * 1024 / 1000;
bdcbd8e0
JB		 2694 sdata_info(sdata,
2695 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2696 mgmt->sa, tu, ms);
66e67e41 2697 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
89afe614 2698 assoc_data->timeout_started = true;
66e67e41 2699 if (ms > IEEE80211_ASSOC_TIMEOUT)
8d61ffa5
JB		 2700 run_again(sdata, assoc_data->timeout);
2701 return;
66e67e41
JB		 2702 }
2703
8d61ffa5 2704 bss = assoc_data->bss;
66e67e41
JB		 2705
2706 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2707 sdata_info(sdata, "%pM denied association (code=%d)\n",
2708 mgmt->sa, status_code);
66e67e41
JB		 2709 ieee80211_destroy_assoc_data(sdata, false);
2710 } else {
8d61ffa5 2711 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
66e67e41 2712 /* oops -- internal error -- send timeout for now */
10a9109f 2713 ieee80211_destroy_assoc_data(sdata, false);
8d61ffa5 2714 cfg80211_put_bss(sdata->local->hw.wiphy, bss);
6ff57cf8 2715 cfg80211_assoc_timeout(sdata->dev, mgmt->bssid);
8d61ffa5 2716 return;
66e67e41 2717 }
635d999f 2718 sdata_info(sdata, "associated\n");
79ebfb85
JB		 2719
2720 /*
2721 * destroy assoc_data afterwards, as otherwise an idle
2722 * recalc after assoc_data is NULL but before associated
2723 * is set can cause the interface to go idle
2724 */
2725 ieee80211_destroy_assoc_data(sdata, true);
66e67e41
JB		 2726 }
2727
6ff57cf8 2728 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len);
66e67e41 2729}
8e3c1b77 2730
98c8fccf 2731static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
8e3c1b77 2732 struct ieee80211_mgmt *mgmt, size_t len,
98c8fccf 2733 struct ieee80211_rx_status *rx_status,
d45c4172 2734 struct ieee802_11_elems *elems)
98c8fccf
JB		 2735{
2736 struct ieee80211_local *local = sdata->local;
2737 int freq;
c2b13452 2738 struct ieee80211_bss *bss;
98c8fccf 2739 struct ieee80211_channel *channel;
56007a02 2740
8d61ffa5 2741 sdata_assert_lock(sdata);
b4f286a1 2742
1cd8e88e 2743 if (elems->ds_params)
59eb21a6
BR		 2744 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
2745 rx_status->band);
98c8fccf
JB		 2746 else
2747 freq = rx_status->freq;
2748
2749 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2750
2751 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2752 return;
2753
98c8fccf 2754 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
d45c4172 2755 channel);
77fdaa12
JB		 2756 if (bss)
2757 ieee80211_rx_bss_put(local, bss);
2758
37799e52
JB		 2759 if (!sdata->u.mgd.associated ||
2760 !ether_addr_equal(mgmt->bssid, sdata->u.mgd.associated->bssid))
98c8fccf
JB		 2761 return;
2762
04a161f4
JB		 2763 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
2764 elems, true);
b4f286a1 2765
f0706e82
JB		 2766}
2767
2768
f698d856 2769static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 2770 struct sk_buff *skb)
f0706e82 2771{
af6b6374 2772 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 2773 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 2774 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2775 size_t baselen, len = skb->len;
ae6a44e3
EK		 2776 struct ieee802_11_elems elems;
2777
15b7b062
KV		 2778 ifmgd = &sdata->u.mgd;
2779
8d61ffa5 2780 sdata_assert_lock(sdata);
77fdaa12 2781
b203ca39 2782 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
8e7cdbb6
TW		 2783 return; /* ignore ProbeResp to foreign address */
2784
ae6a44e3
EK		 2785 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2786 if (baselen > len)
2787 return;
2788
2789 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
b2e506bf 2790 false, &elems);
ae6a44e3 2791
d45c4172 2792 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
9859b81e 2793
77fdaa12 2794 if (ifmgd->associated &&
b203ca39 2795 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
4e5ff376 2796 ieee80211_reset_ap_probe(sdata);
66e67e41
JB		 2797
2798 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
b203ca39 2799 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
66e67e41 2800 /* got probe response, continue with auth */
bdcbd8e0 2801 sdata_info(sdata, "direct probe responded\n");
66e67e41
JB		 2802 ifmgd->auth_data->tries = 0;
2803 ifmgd->auth_data->timeout = jiffies;
89afe614 2804 ifmgd->auth_data->timeout_started = true;
8d61ffa5 2805 run_again(sdata, ifmgd->auth_data->timeout);
66e67e41 2806 }
f0706e82
JB		 2807}
2808
d91f36db
JB		 2809/*
2810 * This is the canonical list of information elements we care about,
2811 * the filter code also gives us all changes to the Microsoft OUI
2812 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2813 *
2814 * We implement beacon filtering in software since that means we can
2815 * avoid processing the frame here and in cfg80211, and userspace
2816 * will not be able to tell whether the hardware supports it or not.
2817 *
2818 * XXX: This list needs to be dynamic -- userspace needs to be able to
2819 * add items it requires. It also needs to be able to tell us to
2820 * look out for other vendor IEs.
2821 */
2822static const u64 care_about_ies =
1d4df3a5
JB		 2823 (1ULL << WLAN_EID_COUNTRY) |
2824 (1ULL << WLAN_EID_ERP_INFO) |
2825 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2826 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2827 (1ULL << WLAN_EID_HT_CAPABILITY) |
074d46d1 2828 (1ULL << WLAN_EID_HT_OPERATION);
d91f36db 2829
8d61ffa5
JB		 2830static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
2831 struct ieee80211_mgmt *mgmt, size_t len,
2832 struct ieee80211_rx_status *rx_status)
f0706e82 2833{
d91f36db 2834 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 2835 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 2836 size_t baselen;
2837 struct ieee802_11_elems elems;
f698d856 2838 struct ieee80211_local *local = sdata->local;
55de908a
JB		 2839 struct ieee80211_chanctx_conf *chanctx_conf;
2840 struct ieee80211_channel *chan;
bee7f586 2841 struct sta_info *sta;
471b3efd 2842 u32 changed = 0;
f87ad637 2843 bool erp_valid;
7a5158ef 2844 u8 erp_value = 0;
d91f36db 2845 u32 ncrc;
77fdaa12 2846 u8 *bssid;
8d61ffa5 2847 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
77fdaa12 2848
8d61ffa5 2849 sdata_assert_lock(sdata);
f0706e82 2850
ae6a44e3
EK		 2851 /* Process beacon from the current BSS */
2852 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2853 if (baselen > len)
8d61ffa5 2854 return;
ae6a44e3 2855
55de908a
JB		 2856 rcu_read_lock();
2857 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2858 if (!chanctx_conf) {
2859 rcu_read_unlock();
8d61ffa5 2860 return;
55de908a
JB		 2861 }
2862
4bf88530 2863 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
55de908a 2864 rcu_read_unlock();
8d61ffa5 2865 return;
55de908a 2866 }
4bf88530 2867 chan = chanctx_conf->def.chan;
55de908a 2868 rcu_read_unlock();
f0706e82 2869
c65dd147 2870 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
b203ca39 2871 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
66e67e41 2872 ieee802_11_parse_elems(mgmt->u.beacon.variable,
b2e506bf 2873 len - baselen, false, &elems);
77fdaa12 2874
d45c4172 2875 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
482a9c74
AB		 2876 if (elems.tim && !elems.parse_error) {
2877 const struct ieee80211_tim_ie *tim_ie = elems.tim;
2878 ifmgd->dtim_period = tim_ie->dtim_period;
2879 }
66e67e41 2880 ifmgd->assoc_data->have_beacon = true;
c65dd147 2881 ifmgd->assoc_data->need_beacon = false;
ef429dad
JB		 2882 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
2883 sdata->vif.bss_conf.sync_tsf =
2884 le64_to_cpu(mgmt->u.beacon.timestamp);
2885 sdata->vif.bss_conf.sync_device_ts =
2886 rx_status->device_timestamp;
2887 if (elems.tim)
2888 sdata->vif.bss_conf.sync_dtim_count =
2889 elems.tim->dtim_count;
2890 else
2891 sdata->vif.bss_conf.sync_dtim_count = 0;
2892 }
66e67e41
JB		 2893 /* continue assoc process */
2894 ifmgd->assoc_data->timeout = jiffies;
89afe614 2895 ifmgd->assoc_data->timeout_started = true;
8d61ffa5
JB		 2896 run_again(sdata, ifmgd->assoc_data->timeout);
2897 return;
66e67e41 2898 }
77fdaa12 2899
66e67e41 2900 if (!ifmgd->associated ||
b203ca39 2901 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
8d61ffa5 2902 return;
66e67e41 2903 bssid = ifmgd->associated->bssid;
f0706e82 2904
17e4ec14
JM		 2905 /* Track average RSSI from the Beacon frames of the current AP */
2906 ifmgd->last_beacon_signal = rx_status->signal;
2907 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
2908 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3ba06c6f 2909 ifmgd->ave_beacon_signal = rx_status->signal * 16;
17e4ec14 2910 ifmgd->last_cqm_event_signal = 0;
391a200a 2911 ifmgd->count_beacon_signal = 1;
615f7b9b 2912 ifmgd->last_ave_beacon_signal = 0;
17e4ec14
JM		 2913 } else {
2914 ifmgd->ave_beacon_signal =
2915 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
2916 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
2917 ifmgd->ave_beacon_signal) / 16;
391a200a 2918 ifmgd->count_beacon_signal++;
17e4ec14 2919 }
615f7b9b
MV		 2920
2921 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
2922 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
2923 int sig = ifmgd->ave_beacon_signal;
2924 int last_sig = ifmgd->last_ave_beacon_signal;
2925
2926 /*
2927 * if signal crosses either of the boundaries, invoke callback
2928 * with appropriate parameters
2929 */
2930 if (sig > ifmgd->rssi_max_thold &&
2931 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
2932 ifmgd->last_ave_beacon_signal = sig;
887da917 2933 drv_rssi_callback(local, sdata, RSSI_EVENT_HIGH);
615f7b9b
MV		 2934 } else if (sig < ifmgd->rssi_min_thold &&
2935 (last_sig >= ifmgd->rssi_max_thold ||
2936 last_sig == 0)) {
2937 ifmgd->last_ave_beacon_signal = sig;
887da917 2938 drv_rssi_callback(local, sdata, RSSI_EVENT_LOW);
615f7b9b
MV		 2939 }
2940 }
2941
17e4ec14 2942 if (bss_conf->cqm_rssi_thold &&
391a200a 2943 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
ea086359 2944 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
17e4ec14
JM		 2945 int sig = ifmgd->ave_beacon_signal / 16;
2946 int last_event = ifmgd->last_cqm_event_signal;
2947 int thold = bss_conf->cqm_rssi_thold;
2948 int hyst = bss_conf->cqm_rssi_hyst;
2949 if (sig < thold &&
2950 (last_event == 0 || sig < last_event - hyst)) {
2951 ifmgd->last_cqm_event_signal = sig;
2952 ieee80211_cqm_rssi_notify(
2953 &sdata->vif,
2954 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
2955 GFP_KERNEL);
2956 } else if (sig > thold &&
2957 (last_event == 0 || sig > last_event + hyst)) {
2958 ifmgd->last_cqm_event_signal = sig;
2959 ieee80211_cqm_rssi_notify(
2960 &sdata->vif,
2961 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
2962 GFP_KERNEL);
2963 }
2964 }
2965
b291ba11 2966 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
bdcbd8e0 2967 mlme_dbg_ratelimited(sdata,
112c31f0 2968 "cancelling AP probe due to a received beacon\n");
925e64c3 2969 mutex_lock(&local->mtx);
b291ba11 2970 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
925e64c3
SG		 2971 ieee80211_run_deferred_scan(local);
2972 mutex_unlock(&local->mtx);
2973
4e751843
JB		 2974 mutex_lock(&local->iflist_mtx);
2975 ieee80211_recalc_ps(local, -1);
2976 mutex_unlock(&local->iflist_mtx);
92778180
JM		 2977 }
2978
b291ba11
JB		 2979 /*
2980 * Push the beacon loss detection into the future since
2981 * we are processing a beacon from the AP just now.
2982 */
d3a910a8 2983 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 2984
d91f36db
JB		 2985 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
2986 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
b2e506bf 2987 len - baselen, false, &elems,
d91f36db
JB		 2988 care_about_ies, ncrc);
2989
25c9c875 2990 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
f87ad637
RR		 2991 bool directed_tim = ieee80211_check_tim(elems.tim,
2992 elems.tim_len,
2993 ifmgd->aid);
1fb3606b 2994 if (directed_tim) {
572e0012 2995 if (local->hw.conf.dynamic_ps_timeout > 0) {
70b12f26
RW		 2996 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2997 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2998 ieee80211_hw_config(local,
2999 IEEE80211_CONF_CHANGE_PS);
3000 }
572e0012 3001 ieee80211_send_nullfunc(local, sdata, 0);
6f0756a3 3002 } else if (!local->pspolling && sdata->u.mgd.powersave) {
572e0012
KV		 3003 local->pspolling = true;
3004
3005 /*
3006 * Here is assumed that the driver will be
3007 * able to send ps-poll frame and receive a
3008 * response even though power save mode is
3009 * enabled, but some drivers might require
3010 * to disable power save here. This needs
3011 * to be investigated.
3012 */
3013 ieee80211_send_pspoll(local, sdata);
3014 }
a97b77b9
VN		 3015 }
3016 }
7a5158ef 3017
488dd7b5 3018 if (sdata->vif.p2p) {
67baf663 3019 struct ieee80211_p2p_noa_attr noa = {};
488dd7b5
JB		 3020 int ret;
3021
3022 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3023 len - baselen,
3024 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
934457ee 3025 (u8 *) &noa, sizeof(noa));
67baf663
JD		 3026 if (ret >= 2) {
3027 if (sdata->u.mgd.p2p_noa_index != noa.index) {
3028 /* valid noa_attr and index changed */
3029 sdata->u.mgd.p2p_noa_index = noa.index;
3030 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3031 changed |= BSS_CHANGED_P2P_PS;
3032 /*
3033 * make sure we update all information, the CRC
3034 * mechanism doesn't look at P2P attributes.
3035 */
3036 ifmgd->beacon_crc_valid = false;
3037 }
3038 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3039 /* noa_attr not found and we had valid noa_attr before */
3040 sdata->u.mgd.p2p_noa_index = -1;
3041 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
488dd7b5 3042 changed |= BSS_CHANGED_P2P_PS;
488dd7b5
JB		 3043 ifmgd->beacon_crc_valid = false;
3044 }
3045 }
3046
d8ec4433 3047 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
8d61ffa5 3048 return;
30196673 3049 ifmgd->beacon_crc = ncrc;
d8ec4433 3050 ifmgd->beacon_crc_valid = true;
30196673 3051
d45c4172 3052 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
7d25745d
JB		 3053
3054 if (ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3055 elems.wmm_param_len))
3056 changed |= BSS_CHANGED_QOS;
3057
c65dd147
EG		 3058 /*
3059 * If we haven't had a beacon before, tell the driver about the
ef429dad 3060 * DTIM period (and beacon timing if desired) now.
c65dd147
EG		 3061 */
3062 if (!bss_conf->dtim_period) {
3063 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3064 if (elems.tim)
3065 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3066 else
3067 bss_conf->dtim_period = 1;
ef429dad
JB		 3068
3069 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3070 sdata->vif.bss_conf.sync_tsf =
3071 le64_to_cpu(mgmt->u.beacon.timestamp);
3072 sdata->vif.bss_conf.sync_device_ts =
3073 rx_status->device_timestamp;
3074 if (elems.tim)
3075 sdata->vif.bss_conf.sync_dtim_count =
3076 elems.tim->dtim_count;
3077 else
3078 sdata->vif.bss_conf.sync_dtim_count = 0;
3079 }
3080
c65dd147 3081 changed |= BSS_CHANGED_DTIM_PERIOD;
482a9c74
AB		 3082
3083 mutex_lock(&local->iflist_mtx);
3084 ieee80211_recalc_ps(local, -1);
3085 mutex_unlock(&local->iflist_mtx);
3086
ce857888 3087 ieee80211_recalc_ps_vif(sdata);
c65dd147
EG		 3088 }
3089
1946bed9 3090 if (elems.erp_info) {
7a5158ef
JB		 3091 erp_valid = true;
3092 erp_value = elems.erp_info[0];
3093 } else {
3094 erp_valid = false;
50c4afb9 3095 }
7a5158ef
JB		 3096 changed |= ieee80211_handle_bss_capability(sdata,
3097 le16_to_cpu(mgmt->u.beacon.capab_info),
3098 erp_valid, erp_value);
f0706e82 3099
1128958d 3100 mutex_lock(&local->sta_mtx);
bee7f586
JB		 3101 sta = sta_info_get(sdata, bssid);
3102
30eb1dc2
JB		 3103 if (ieee80211_config_bw(sdata, sta, elems.ht_operation,
3104 elems.vht_operation, bssid, &changed)) {
3105 mutex_unlock(&local->sta_mtx);
3106 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3107 WLAN_REASON_DEAUTH_LEAVING,
3108 true, deauth_buf);
6ff57cf8
JB		 3109 cfg80211_tx_mlme_mgmt(sdata->dev, deauth_buf,
3110 sizeof(deauth_buf));
8d61ffa5 3111 return;
30eb1dc2 3112 }
bee7f586
JB		 3113
3114 if (sta && elems.opmode_notif)
3115 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3116 rx_status->band, true);
1128958d 3117 mutex_unlock(&local->sta_mtx);
d3c990fb 3118
04b7b2ff
JB		 3119 if (elems.country_elem && elems.pwr_constr_elem &&
3120 mgmt->u.probe_resp.capab_info &
3121 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT))
1ea6f9c0
JB		 3122 changed |= ieee80211_handle_pwr_constr(sdata, chan,
3123 elems.country_elem,
3124 elems.country_elem_len,
3125 elems.pwr_constr_elem);
3f2355cb 3126
471b3efd 3127 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 3128}
3129
1fa57d01
JB		 3130void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3131 struct sk_buff *skb)
f0706e82
JB		 3132{
3133 struct ieee80211_rx_status *rx_status;
f0706e82
JB		 3134 struct ieee80211_mgmt *mgmt;
3135 u16 fc;
1b3a2e49
JB		 3136 struct ieee802_11_elems elems;
3137 int ies_len;
f0706e82 3138
f0706e82
JB		 3139 rx_status = (struct ieee80211_rx_status *) skb->cb;
3140 mgmt = (struct ieee80211_mgmt *) skb->data;
3141 fc = le16_to_cpu(mgmt->frame_control);
3142
8d61ffa5 3143 sdata_lock(sdata);
77fdaa12 3144
66e67e41
JB		 3145 switch (fc & IEEE80211_FCTL_STYPE) {
3146 case IEEE80211_STYPE_BEACON:
8d61ffa5 3147 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
66e67e41
JB		 3148 break;
3149 case IEEE80211_STYPE_PROBE_RESP:
3150 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3151 break;
3152 case IEEE80211_STYPE_AUTH:
8d61ffa5 3153 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
66e67e41
JB		 3154 break;
3155 case IEEE80211_STYPE_DEAUTH:
8d61ffa5 3156 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
66e67e41
JB		 3157 break;
3158 case IEEE80211_STYPE_DISASSOC:
8d61ffa5 3159 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
66e67e41
JB		 3160 break;
3161 case IEEE80211_STYPE_ASSOC_RESP:
3162 case IEEE80211_STYPE_REASSOC_RESP:
8d61ffa5 3163 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
66e67e41
JB		 3164 break;
3165 case IEEE80211_STYPE_ACTION:
37799e52 3166 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
1b3a2e49
JB		 3167 ies_len = skb->len -
3168 offsetof(struct ieee80211_mgmt,
3169 u.action.u.chan_switch.variable);
37799e52
JB		 3170
3171 if (ies_len < 0)
3172 break;
3173
3174 ieee802_11_parse_elems(
3175 mgmt->u.action.u.chan_switch.variable,
b2e506bf 3176 ies_len, true, &elems);
37799e52
JB		 3177
3178 if (elems.parse_error)
3179 break;
3180
1b3a2e49
JB		 3181 ieee80211_sta_process_chanswitch(sdata,
3182 rx_status->mactime,
04a161f4 3183 &elems, false);
1b3a2e49
JB		 3184 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3185 ies_len = skb->len -
3186 offsetof(struct ieee80211_mgmt,
3187 u.action.u.ext_chan_switch.variable);
3188
3189 if (ies_len < 0)
3190 break;
3191
3192 ieee802_11_parse_elems(
3193 mgmt->u.action.u.ext_chan_switch.variable,
b2e506bf 3194 ies_len, true, &elems);
1b3a2e49
JB		 3195
3196 if (elems.parse_error)
3197 break;
3198
3199 /* for the handling code pretend this was also an IE */
3200 elems.ext_chansw_ie =
3201 &mgmt->u.action.u.ext_chan_switch.data;
3202
66e67e41 3203 ieee80211_sta_process_chanswitch(sdata,
37799e52 3204 rx_status->mactime,
04a161f4 3205 &elems, false);
77fdaa12 3206 }
37799e52 3207 break;
77fdaa12 3208 }
8d61ffa5 3209 sdata_unlock(sdata);
f0706e82
JB		 3210}
3211
9c6bd790 3212static void ieee80211_sta_timer(unsigned long data)
f0706e82 3213{
60f8b39c
JB		 3214 struct ieee80211_sub_if_data *sdata =
3215 (struct ieee80211_sub_if_data *) data;
5bb644a0 3216
9b7d72c1 3217 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
f0706e82
JB		 3218}
3219
04ac3c0e 3220static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
6b684db1 3221 u8 *bssid, u8 reason, bool tx)
04ac3c0e 3222{
6ae16775 3223 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
04ac3c0e 3224
37ad3888 3225 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
6b684db1 3226 tx, frame_buf);
37ad3888 3227
6ff57cf8
JB		 3228 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3229 IEEE80211_DEAUTH_FRAME_LEN);
04ac3c0e
FF		 3230}
3231
66e67e41
JB		 3232static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
3233{
3234 struct ieee80211_local *local = sdata->local;
3235 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3236 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
1672c0e3 3237 u32 tx_flags = 0;
66e67e41 3238
8d61ffa5 3239 sdata_assert_lock(sdata);
66e67e41
JB		 3240
3241 if (WARN_ON_ONCE(!auth_data))
3242 return -EINVAL;
3243
66e67e41
JB		 3244 auth_data->tries++;
3245
3246 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
bdcbd8e0
JB		 3247 sdata_info(sdata, "authentication with %pM timed out\n",
3248 auth_data->bss->bssid);
66e67e41
JB		 3249
3250 /*
3251 * Most likely AP is not in the range so remove the
3252 * bss struct for that AP.
3253 */
3254 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3255
3256 return -ETIMEDOUT;
3257 }
3258
a1845fc7
JB		 3259 drv_mgd_prepare_tx(local, sdata);
3260
66e67e41 3261 if (auth_data->bss->proberesp_ies) {
6b8ece3a
JM		 3262 u16 trans = 1;
3263 u16 status = 0;
3264
bdcbd8e0
JB		 3265 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3266 auth_data->bss->bssid, auth_data->tries,
3267 IEEE80211_AUTH_MAX_TRIES);
66e67e41
JB		 3268
3269 auth_data->expected_transaction = 2;
6b8ece3a
JM		 3270
3271 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3272 trans = auth_data->sae_trans;
3273 status = auth_data->sae_status;
3274 auth_data->expected_transaction = trans;
3275 }
3276
6211dd12
SG		 3277 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3278 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3279 IEEE80211_TX_INTFL_MLME_CONN_TX;
3280
6b8ece3a
JM		 3281 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3282 auth_data->data, auth_data->data_len,
66e67e41 3283 auth_data->bss->bssid,
1672c0e3
JB		 3284 auth_data->bss->bssid, NULL, 0, 0,
3285 tx_flags);
66e67e41
JB		 3286 } else {
3287 const u8 *ssidie;
3288
bdcbd8e0
JB		 3289 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
3290 auth_data->bss->bssid, auth_data->tries,
3291 IEEE80211_AUTH_MAX_TRIES);
66e67e41 3292
9caf0364 3293 rcu_read_lock();
66e67e41 3294 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
9caf0364
JB		 3295 if (!ssidie) {
3296 rcu_read_unlock();
66e67e41 3297 return -EINVAL;
9caf0364 3298 }
66e67e41
JB		 3299 /*
3300 * Direct probe is sent to broadcast address as some APs
3301 * will not answer to direct packet in unassociated state.
3302 */
3303 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
6211dd12 3304 NULL, 0, (u32) -1, true, 0,
55de908a 3305 auth_data->bss->channel, false);
9caf0364 3306 rcu_read_unlock();
66e67e41
JB		 3307 }
3308
6211dd12 3309 if (tx_flags == 0) {
1672c0e3 3310 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
89afe614 3311 ifmgd->auth_data->timeout_started = true;
8d61ffa5 3312 run_again(sdata, auth_data->timeout);
89afe614
JB		 3313 } else {
3314 auth_data->timeout_started = false;
1672c0e3 3315 }
66e67e41
JB		 3316
3317 return 0;
3318}
3319
3320static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3321{
3322 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3323 struct ieee80211_local *local = sdata->local;
3324
8d61ffa5 3325 sdata_assert_lock(sdata);
66e67e41 3326
66e67e41
JB		 3327 assoc_data->tries++;
3328 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
bdcbd8e0
JB		 3329 sdata_info(sdata, "association with %pM timed out\n",
3330 assoc_data->bss->bssid);
66e67e41
JB		 3331
3332 /*
3333 * Most likely AP is not in the range so remove the
3334 * bss struct for that AP.
3335 */
3336 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3337
3338 return -ETIMEDOUT;
3339 }
3340
bdcbd8e0
JB		 3341 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3342 assoc_data->bss->bssid, assoc_data->tries,
3343 IEEE80211_ASSOC_MAX_TRIES);
66e67e41
JB		 3344 ieee80211_send_assoc(sdata);
3345
1672c0e3
JB		 3346 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
3347 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
89afe614 3348 assoc_data->timeout_started = true;
8d61ffa5 3349 run_again(sdata, assoc_data->timeout);
89afe614
JB		 3350 } else {
3351 assoc_data->timeout_started = false;
1672c0e3 3352 }
66e67e41
JB		 3353
3354 return 0;
3355}
3356
1672c0e3
JB		 3357void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3358 __le16 fc, bool acked)
3359{
3360 struct ieee80211_local *local = sdata->local;
3361
3362 sdata->u.mgd.status_fc = fc;
3363 sdata->u.mgd.status_acked = acked;
3364 sdata->u.mgd.status_received = true;
3365
3366 ieee80211_queue_work(&local->hw, &sdata->work);
3367}
3368
1fa57d01 3369void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 3370{
9c6bd790 3371 struct ieee80211_local *local = sdata->local;
1fa57d01 3372 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 3373
8d61ffa5 3374 sdata_lock(sdata);
77fdaa12 3375
1672c0e3
JB		 3376 if (ifmgd->status_received) {
3377 __le16 fc = ifmgd->status_fc;
3378 bool status_acked = ifmgd->status_acked;
3379
3380 ifmgd->status_received = false;
3381 if (ifmgd->auth_data &&
3382 (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) {
3383 if (status_acked) {
3384 ifmgd->auth_data->timeout =
3385 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
8d61ffa5 3386 run_again(sdata, ifmgd->auth_data->timeout);
1672c0e3
JB		 3387 } else {
3388 ifmgd->auth_data->timeout = jiffies - 1;
3389 }
89afe614 3390 ifmgd->auth_data->timeout_started = true;
1672c0e3
JB		 3391 } else if (ifmgd->assoc_data &&
3392 (ieee80211_is_assoc_req(fc) ||
3393 ieee80211_is_reassoc_req(fc))) {
3394 if (status_acked) {
3395 ifmgd->assoc_data->timeout =
3396 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
8d61ffa5 3397 run_again(sdata, ifmgd->assoc_data->timeout);
1672c0e3
JB		 3398 } else {
3399 ifmgd->assoc_data->timeout = jiffies - 1;
3400 }
89afe614 3401 ifmgd->assoc_data->timeout_started = true;
1672c0e3
JB		 3402 }
3403 }
3404
89afe614 3405 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
66e67e41
JB		 3406 time_after(jiffies, ifmgd->auth_data->timeout)) {
3407 if (ifmgd->auth_data->done) {
3408 /*
3409 * ok ... we waited for assoc but userspace didn't,
3410 * so let's just kill the auth data
3411 */
3412 ieee80211_destroy_auth_data(sdata, false);
3413 } else if (ieee80211_probe_auth(sdata)) {
3414 u8 bssid[ETH_ALEN];
3415
3416 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3417
3418 ieee80211_destroy_auth_data(sdata, false);
3419
6ff57cf8 3420 cfg80211_auth_timeout(sdata->dev, bssid);
66e67e41 3421 }
89afe614 3422 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
8d61ffa5 3423 run_again(sdata, ifmgd->auth_data->timeout);
66e67e41 3424
89afe614 3425 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
66e67e41 3426 time_after(jiffies, ifmgd->assoc_data->timeout)) {
c65dd147
EG		 3427 if ((ifmgd->assoc_data->need_beacon &&
3428 !ifmgd->assoc_data->have_beacon) ||
66e67e41
JB		 3429 ieee80211_do_assoc(sdata)) {
3430 u8 bssid[ETH_ALEN];
3431
3432 memcpy(bssid, ifmgd->assoc_data->bss->bssid, ETH_ALEN);
3433
3434 ieee80211_destroy_assoc_data(sdata, false);
3435
6ff57cf8 3436 cfg80211_assoc_timeout(sdata->dev, bssid);
66e67e41 3437 }
89afe614 3438 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
8d61ffa5 3439 run_again(sdata, ifmgd->assoc_data->timeout);
66e67e41 3440
b291ba11
JB		 3441 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
3442 IEEE80211_STA_CONNECTION_POLL) &&
3443 ifmgd->associated) {
a43abf29 3444 u8 bssid[ETH_ALEN];
72a8a3ed 3445 int max_tries;
a43abf29 3446
0c1ad2ca 3447 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 3448
72a8a3ed 3449 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
180205bd 3450 max_tries = max_nullfunc_tries;
72a8a3ed 3451 else
180205bd 3452 max_tries = max_probe_tries;
72a8a3ed 3453
4e5ff376
FF		 3454 /* ACK received for nullfunc probing frame */
3455 if (!ifmgd->probe_send_count)
3456 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 3457 else if (ifmgd->nullfunc_failed) {
3458 if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3459 mlme_dbg(sdata,
3460 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3461 bssid, ifmgd->probe_send_count,
3462 max_tries);
04ac3c0e
FF		 3463 ieee80211_mgd_probe_ap_send(sdata);
3464 } else {
bdcbd8e0
JB		 3465 mlme_dbg(sdata,
3466 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3467 bssid);
95acac61 3468 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1
JB		 3469 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3470 false);
04ac3c0e
FF		 3471 }
3472 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
8d61ffa5 3473 run_again(sdata, ifmgd->probe_timeout);
04ac3c0e 3474 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
bdcbd8e0
JB		 3475 mlme_dbg(sdata,
3476 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3477 bssid, probe_wait_ms);
95acac61 3478 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 3479 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
04ac3c0e 3480 } else if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3481 mlme_dbg(sdata,
3482 "No probe response from AP %pM after %dms, try %d/%i\n",
3483 bssid, probe_wait_ms,
3484 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 3485 ieee80211_mgd_probe_ap_send(sdata);
3486 } else {
b291ba11
JB		 3487 /*
3488 * We actually lost the connection ... or did we?
3489 * Let's make sure!
3490 */
b38afa87
BG		 3491 wiphy_debug(local->hw.wiphy,
3492 "%s: No probe response from AP %pM"
3493 " after %dms, disconnecting.\n",
3494 sdata->name,
180205bd 3495 bssid, probe_wait_ms);
04ac3c0e 3496
95acac61 3497 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 3498 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
b291ba11
JB		 3499 }
3500 }
3501
8d61ffa5 3502 sdata_unlock(sdata);
f0706e82
JB		 3503}
3504
b291ba11
JB		 3505static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3506{
3507 struct ieee80211_sub_if_data *sdata =
3508 (struct ieee80211_sub_if_data *) data;
3509 struct ieee80211_local *local = sdata->local;
3510
3511 if (local->quiescing)
3512 return;
3513
682bd38b 3514 sdata->u.mgd.connection_loss = false;
1e4dcd01
JO		 3515 ieee80211_queue_work(&sdata->local->hw,
3516 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 3517}
3518
3519static void ieee80211_sta_conn_mon_timer(unsigned long data)
3520{
3521 struct ieee80211_sub_if_data *sdata =
3522 (struct ieee80211_sub_if_data *) data;
3523 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3524 struct ieee80211_local *local = sdata->local;
3525
3526 if (local->quiescing)
3527 return;
3528
42935eca 3529 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 3530}
3531
3532static void ieee80211_sta_monitor_work(struct work_struct *work)
3533{
3534 struct ieee80211_sub_if_data *sdata =
3535 container_of(work, struct ieee80211_sub_if_data,
3536 u.mgd.monitor_work);
3537
3538 ieee80211_mgd_probe_ap(sdata, false);
3539}
3540
9c6bd790
JB		 3541static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3542{
494f1fe5
EP		 3543 u32 flags;
3544
ad935687 3545 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
925e64c3 3546 __ieee80211_stop_poll(sdata);
ad935687 3547
b291ba11 3548 /* let's probe the connection once */
494f1fe5
EP		 3549 flags = sdata->local->hw.flags;
3550 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3551 ieee80211_queue_work(&sdata->local->hw,
3552 &sdata->u.mgd.monitor_work);
b291ba11 3553 /* and do all the other regular work too */
64592c8f 3554 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 3555 }
9c6bd790 3556}
f0706e82 3557
b8360ab8
JB		 3558#ifdef CONFIG_PM
3559void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
3560{
3561 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3562
8d61ffa5 3563 sdata_lock(sdata);
b8360ab8 3564 if (!ifmgd->associated) {
8d61ffa5 3565 sdata_unlock(sdata);
b8360ab8
JB		 3566 return;
3567 }
3568
3569 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
3570 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
3571 mlme_dbg(sdata, "driver requested disconnect after resume\n");
3572 ieee80211_sta_connection_lost(sdata,
3573 ifmgd->associated->bssid,
3574 WLAN_REASON_UNSPECIFIED,
3575 true);
8d61ffa5 3576 sdata_unlock(sdata);
b8360ab8
JB		 3577 return;
3578 }
8d61ffa5 3579 sdata_unlock(sdata);
b8360ab8
JB		 3580}
3581#endif
3582
9c6bd790
JB		 3583/* interface setup */
3584void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 3585{
46900298 3586 struct ieee80211_if_managed *ifmgd;
988c0f72 3587
46900298 3588 ifmgd = &sdata->u.mgd;
b291ba11 3589 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 3590 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 3591 INIT_WORK(&ifmgd->beacon_connection_loss_work,
3592 ieee80211_beacon_connection_loss_work);
882a7c69
JB		 3593 INIT_WORK(&ifmgd->csa_connection_drop_work,
3594 ieee80211_csa_connection_drop_work);
d1f5b7a3 3595 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
46900298 3596 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 3597 (unsigned long) sdata);
b291ba11
JB		 3598 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
3599 (unsigned long) sdata);
3600 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
3601 (unsigned long) sdata);
46900298 3602 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 3603 (unsigned long) sdata);
9c6bd790 3604
ab1faead 3605 ifmgd->flags = 0;
1478acb3 3606 ifmgd->powersave = sdata->wdev.ps;
219c3867
AB		 3607 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
3608 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
67baf663 3609 ifmgd->p2p_noa_index = -1;
bbbdff9e 3610
0f78231b
JB		 3611 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
3612 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
3613 else
3614 ifmgd->req_smps = IEEE80211_SMPS_OFF;
f0706e82
JB		 3615}
3616
77fdaa12
JB		 3617/* scan finished notification */
3618void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 3619{
31ee67a1 3620 struct ieee80211_sub_if_data *sdata;
60f8b39c 3621
77fdaa12
JB		 3622 /* Restart STA timers */
3623 rcu_read_lock();
370bd005
BG		 3624 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3625 if (ieee80211_sdata_running(sdata))
3626 ieee80211_restart_sta_timer(sdata);
3627 }
77fdaa12
JB		 3628 rcu_read_unlock();
3629}
60f8b39c 3630
77fdaa12
JB		 3631int ieee80211_max_network_latency(struct notifier_block *nb,
3632 unsigned long data, void *dummy)
3633{
3634 s32 latency_usec = (s32) data;
3635 struct ieee80211_local *local =
3636 container_of(nb, struct ieee80211_local,
3637 network_latency_notifier);
1fa6f4af 3638
77fdaa12
JB		 3639 mutex_lock(&local->iflist_mtx);
3640 ieee80211_recalc_ps(local, latency_usec);
3641 mutex_unlock(&local->iflist_mtx);
dfe67012 3642
77fdaa12 3643 return 0;
9c6bd790
JB		 3644}
3645
f2d9d270
JB		 3646static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
3647 struct cfg80211_bss *cbss)
3648{
3649 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3650 const u8 *ht_cap_ie, *vht_cap_ie;
3651 const struct ieee80211_ht_cap *ht_cap;
3652 const struct ieee80211_vht_cap *vht_cap;
3653 u8 chains = 1;
3654
3655 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
3656 return chains;
3657
9caf0364 3658 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
f2d9d270
JB		 3659 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
3660 ht_cap = (void *)(ht_cap_ie + 2);
3661 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
3662 /*
3663 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
3664 * "Tx Unequal Modulation Supported" fields.
3665 */
3666 }
3667
3668 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
3669 return chains;
3670
9caf0364 3671 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
f2d9d270
JB		 3672 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
3673 u8 nss;
3674 u16 tx_mcs_map;
3675
3676 vht_cap = (void *)(vht_cap_ie + 2);
3677 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
3678 for (nss = 8; nss > 0; nss--) {
3679 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
3680 IEEE80211_VHT_MCS_NOT_SUPPORTED)
3681 break;
3682 }
3683 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
3684 chains = max(chains, nss);
3685 }
3686
3687 return chains;
3688}
3689
b17166a7
JB		 3690static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
3691 struct cfg80211_bss *cbss)
a1cf775d
JB		 3692{
3693 struct ieee80211_local *local = sdata->local;
3694 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
24398e39 3695 const struct ieee80211_ht_operation *ht_oper = NULL;
f2d9d270 3696 const struct ieee80211_vht_operation *vht_oper = NULL;
24398e39 3697 struct ieee80211_supported_band *sband;
4bf88530 3698 struct cfg80211_chan_def chandef;
f2d9d270 3699 int ret;
a1cf775d 3700
24398e39
JB		 3701 sband = local->hw.wiphy->bands[cbss->channel->band];
3702
f2d9d270
JB		 3703 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
3704 IEEE80211_STA_DISABLE_80P80MHZ |
3705 IEEE80211_STA_DISABLE_160MHZ);
3706
9caf0364
JB		 3707 rcu_read_lock();
3708
f2d9d270
JB		 3709 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3710 sband->ht_cap.ht_supported) {
08e6effa 3711 const u8 *ht_oper_ie, *ht_cap;
24398e39 3712
9caf0364 3713 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
24398e39
JB		 3714 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3715 ht_oper = (void *)(ht_oper_ie + 2);
08e6effa
JB		 3716
3717 ht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
3718 if (!ht_cap || ht_cap[1] < sizeof(struct ieee80211_ht_cap)) {
3719 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3720 ht_oper = NULL;
3721 }
24398e39
JB		 3722 }
3723
f2d9d270
JB		 3724 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3725 sband->vht_cap.vht_supported) {
08e6effa 3726 const u8 *vht_oper_ie, *vht_cap;
f2d9d270 3727
9caf0364
JB		 3728 vht_oper_ie = ieee80211_bss_get_ie(cbss,
3729 WLAN_EID_VHT_OPERATION);
f2d9d270
JB		 3730 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
3731 vht_oper = (void *)(vht_oper_ie + 2);
3732 if (vht_oper && !ht_oper) {
3733 vht_oper = NULL;
bdcbd8e0 3734 sdata_info(sdata,
f2d9d270 3735 "AP advertised VHT without HT, disabling both\n");
cb145022
JB		 3736 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3737 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
24398e39 3738 }
08e6effa
JB		 3739
3740 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
3741 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
3742 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3743 vht_oper = NULL;
3744 }
24398e39
JB		 3745 }
3746
f2d9d270
JB		 3747 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
3748 cbss->channel,
3749 ht_oper, vht_oper,
30eb1dc2 3750 &chandef, true);
04ecd257 3751
f2d9d270
JB		 3752 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
3753 local->rx_chains);
24398e39 3754
9caf0364
JB		 3755 rcu_read_unlock();
3756
04ecd257
JB		 3757 /* will change later if needed */
3758 sdata->smps_mode = IEEE80211_SMPS_OFF;
3759
f2d9d270
JB		 3760 /*
3761 * If this fails (possibly due to channel context sharing
3762 * on incompatible channels, e.g. 80+80 and 160 sharing the
3763 * same control channel) try to use a smaller bandwidth.
3764 */
3765 ret = ieee80211_vif_use_channel(sdata, &chandef,
3766 IEEE80211_CHANCTX_SHARED);
d601cd8d 3767 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
f2d9d270 3768 ifmgd->flags |= chandef_downgrade(&chandef);
d601cd8d
JB		 3769 ret = ieee80211_vif_use_channel(sdata, &chandef,
3770 IEEE80211_CHANCTX_SHARED);
3771 }
f2d9d270 3772 return ret;
b17166a7
JB		 3773}
3774
3775static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
3776 struct cfg80211_bss *cbss, bool assoc)
3777{
3778 struct ieee80211_local *local = sdata->local;
3779 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3780 struct ieee80211_bss *bss = (void *)cbss->priv;
3781 struct sta_info *new_sta = NULL;
3782 bool have_sta = false;
3783 int err;
3784
3785 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3786 return -EINVAL;
3787
3788 if (assoc) {
3789 rcu_read_lock();
3790 have_sta = sta_info_get(sdata, cbss->bssid);
3791 rcu_read_unlock();
3792 }
3793
3794 if (!have_sta) {
3795 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
3796 if (!new_sta)
3797 return -ENOMEM;
3798 }
3799
13e0c8e3 3800 if (new_sta) {
5d6a1b06
JB		 3801 u32 rates = 0, basic_rates = 0;
3802 bool have_higher_than_11mbit;
3803 int min_rate = INT_MAX, min_rate_index = -1;
b17166a7 3804 struct ieee80211_supported_band *sband;
8cef2c9d 3805 const struct cfg80211_bss_ies *ies;
b17166a7
JB		 3806
3807 sband = local->hw.wiphy->bands[cbss->channel->band];
3808
3809 err = ieee80211_prep_channel(sdata, cbss);
3810 if (err) {
3811 sta_info_free(local, new_sta);
3812 return err;
3813 }
5d6a1b06 3814
5d6a1b06
JB		 3815 ieee80211_get_rates(sband, bss->supp_rates,
3816 bss->supp_rates_len,
3817 &rates, &basic_rates,
3818 &have_higher_than_11mbit,
3819 &min_rate, &min_rate_index);
3820
3821 /*
3822 * This used to be a workaround for basic rates missing
3823 * in the association response frame. Now that we no
3824 * longer use the basic rates from there, it probably
3825 * doesn't happen any more, but keep the workaround so
3826 * in case some *other* APs are buggy in different ways
3827 * we can connect -- with a warning.
3828 */
3829 if (!basic_rates && min_rate_index >= 0) {
bdcbd8e0
JB		 3830 sdata_info(sdata,
3831 "No basic rates, using min rate instead\n");
5d6a1b06
JB		 3832 basic_rates = BIT(min_rate_index);
3833 }
3834
13e0c8e3 3835 new_sta->sta.supp_rates[cbss->channel->band] = rates;
5d6a1b06
JB		 3836 sdata->vif.bss_conf.basic_rates = basic_rates;
3837
3838 /* cf. IEEE 802.11 9.2.12 */
55de908a 3839 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
5d6a1b06
JB		 3840 have_higher_than_11mbit)
3841 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3842 else
3843 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
3844
3845 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
3846
8c358bcd
JB		 3847 /* set timing information */
3848 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
8cef2c9d 3849 rcu_read_lock();
ef429dad
JB		 3850 ies = rcu_dereference(cbss->beacon_ies);
3851 if (ies) {
3852 const u8 *tim_ie;
3853
3854 sdata->vif.bss_conf.sync_tsf = ies->tsf;
3855 sdata->vif.bss_conf.sync_device_ts =
3856 bss->device_ts_beacon;
3857 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
3858 ies->data, ies->len);
3859 if (tim_ie && tim_ie[1] >= 2)
3860 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
3861 else
3862 sdata->vif.bss_conf.sync_dtim_count = 0;
3863 } else if (!(local->hw.flags &
3864 IEEE80211_HW_TIMING_BEACON_ONLY)) {
3865 ies = rcu_dereference(cbss->proberesp_ies);
3866 /* must be non-NULL since beacon IEs were NULL */
3867 sdata->vif.bss_conf.sync_tsf = ies->tsf;
3868 sdata->vif.bss_conf.sync_device_ts =
3869 bss->device_ts_presp;
3870 sdata->vif.bss_conf.sync_dtim_count = 0;
3871 } else {
3872 sdata->vif.bss_conf.sync_tsf = 0;
3873 sdata->vif.bss_conf.sync_device_ts = 0;
3874 sdata->vif.bss_conf.sync_dtim_count = 0;
3875 }
8cef2c9d 3876 rcu_read_unlock();
8c358bcd
JB		 3877
3878 /* tell driver about BSSID, basic rates and timing */
5d6a1b06 3879 ieee80211_bss_info_change_notify(sdata,
8c358bcd
JB		 3880 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
3881 BSS_CHANGED_BEACON_INT);
a1cf775d
JB		 3882
3883 if (assoc)
13e0c8e3 3884 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
a1cf775d 3885
13e0c8e3
JB		 3886 err = sta_info_insert(new_sta);
3887 new_sta = NULL;
a1cf775d 3888 if (err) {
bdcbd8e0
JB		 3889 sdata_info(sdata,
3890 "failed to insert STA entry for the AP (error %d)\n",
3891 err);
a1cf775d
JB		 3892 return err;
3893 }
3894 } else
b203ca39 3895 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
a1cf775d
JB		 3896
3897 return 0;
3898}
3899
77fdaa12
JB		 3900/* config hooks */
3901int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
3902 struct cfg80211_auth_request *req)
9c6bd790 3903{
66e67e41
JB		 3904 struct ieee80211_local *local = sdata->local;
3905 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3906 struct ieee80211_mgd_auth_data *auth_data;
77fdaa12 3907 u16 auth_alg;
66e67e41
JB		 3908 int err;
3909
3910 /* prepare auth data structure */
9c6bd790 3911
77fdaa12
JB		 3912 switch (req->auth_type) {
3913 case NL80211_AUTHTYPE_OPEN_SYSTEM:
3914 auth_alg = WLAN_AUTH_OPEN;
3915 break;
3916 case NL80211_AUTHTYPE_SHARED_KEY:
66e67e41 3917 if (IS_ERR(local->wep_tx_tfm))
9dca9c49 3918 return -EOPNOTSUPP;
77fdaa12
JB		 3919 auth_alg = WLAN_AUTH_SHARED_KEY;
3920 break;
3921 case NL80211_AUTHTYPE_FT:
3922 auth_alg = WLAN_AUTH_FT;
3923 break;
3924 case NL80211_AUTHTYPE_NETWORK_EAP:
3925 auth_alg = WLAN_AUTH_LEAP;
3926 break;
6b8ece3a
JM		 3927 case NL80211_AUTHTYPE_SAE:
3928 auth_alg = WLAN_AUTH_SAE;
3929 break;
77fdaa12
JB		 3930 default:
3931 return -EOPNOTSUPP;
60f8b39c 3932 }
77fdaa12 3933
6b8ece3a
JM		 3934 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
3935 req->ie_len, GFP_KERNEL);
66e67e41 3936 if (!auth_data)
9c6bd790 3937 return -ENOMEM;
77fdaa12 3938
66e67e41 3939 auth_data->bss = req->bss;
77fdaa12 3940
6b8ece3a
JM		 3941 if (req->sae_data_len >= 4) {
3942 __le16 *pos = (__le16 *) req->sae_data;
3943 auth_data->sae_trans = le16_to_cpu(pos[0]);
3944 auth_data->sae_status = le16_to_cpu(pos[1]);
3945 memcpy(auth_data->data, req->sae_data + 4,
3946 req->sae_data_len - 4);
3947 auth_data->data_len += req->sae_data_len - 4;
3948 }
3949
77fdaa12 3950 if (req->ie && req->ie_len) {
6b8ece3a
JM		 3951 memcpy(&auth_data->data[auth_data->data_len],
3952 req->ie, req->ie_len);
3953 auth_data->data_len += req->ie_len;
9c6bd790 3954 }
77fdaa12 3955
fffd0934 3956 if (req->key && req->key_len) {
66e67e41
JB		 3957 auth_data->key_len = req->key_len;
3958 auth_data->key_idx = req->key_idx;
3959 memcpy(auth_data->key, req->key, req->key_len);
fffd0934
JB		 3960 }
3961
66e67e41 3962 auth_data->algorithm = auth_alg;
60f8b39c 3963
66e67e41 3964 /* try to authenticate/probe */
2a33bee2 3965
66e67e41
JB		 3966 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
3967 ifmgd->assoc_data) {
3968 err = -EBUSY;
3969 goto err_free;
2a33bee2
GE		 3970 }
3971
66e67e41
JB		 3972 if (ifmgd->auth_data)
3973 ieee80211_destroy_auth_data(sdata, false);
2a33bee2 3974
66e67e41
JB		 3975 /* prep auth_data so we don't go into idle on disassoc */
3976 ifmgd->auth_data = auth_data;
af6b6374 3977
7b119dc0
JB		 3978 if (ifmgd->associated) {
3979 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3980
3981 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3982 WLAN_REASON_UNSPECIFIED,
3983 false, frame_buf);
3984
6ff57cf8
JB		 3985 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3986 sizeof(frame_buf));
7b119dc0 3987 }
af6b6374 3988
bdcbd8e0 3989 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
e5b900d2 3990
a1cf775d
JB		 3991 err = ieee80211_prep_connection(sdata, req->bss, false);
3992 if (err)
66e67e41 3993 goto err_clear;
af6b6374 3994
66e67e41
JB		 3995 err = ieee80211_probe_auth(sdata);
3996 if (err) {
66e67e41
JB		 3997 sta_info_destroy_addr(sdata, req->bss->bssid);
3998 goto err_clear;
3999 }
4000
4001 /* hold our own reference */
5b112d3d 4002 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
8d61ffa5 4003 return 0;
66e67e41
JB		 4004
4005 err_clear:
3d2abdfd
EP		 4006 memset(ifmgd->bssid, 0, ETH_ALEN);
4007 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 4008 ifmgd->auth_data = NULL;
4009 err_free:
4010 kfree(auth_data);
66e67e41 4011 return err;
af6b6374
JB		 4012}
4013
77fdaa12
JB		 4014int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4015 struct cfg80211_assoc_request *req)
f0706e82 4016{
66e67e41 4017 struct ieee80211_local *local = sdata->local;
77fdaa12 4018 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 4019 struct ieee80211_bss *bss = (void *)req->bss->priv;
66e67e41 4020 struct ieee80211_mgd_assoc_data *assoc_data;
c65dd147 4021 const struct cfg80211_bss_ies *beacon_ies;
4e74bfdb 4022 struct ieee80211_supported_band *sband;
b08fbbd8 4023 const u8 *ssidie, *ht_ie, *vht_ie;
2a33bee2 4024 int i, err;
f0706e82 4025
66e67e41
JB		 4026 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4027 if (!assoc_data)
4028 return -ENOMEM;
4029
9caf0364
JB		 4030 rcu_read_lock();
4031 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4032 if (!ssidie) {
4033 rcu_read_unlock();
4034 kfree(assoc_data);
4035 return -EINVAL;
4036 }
4037 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4038 assoc_data->ssid_len = ssidie[1];
4039 rcu_read_unlock();
4040
7b119dc0
JB		 4041 if (ifmgd->associated) {
4042 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4043
4044 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4045 WLAN_REASON_UNSPECIFIED,
4046 false, frame_buf);
4047
6ff57cf8
JB		 4048 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4049 sizeof(frame_buf));
7b119dc0 4050 }
66e67e41
JB		 4051
4052 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4053 err = -EBUSY;
4054 goto err_free;
af6b6374 4055 }
77fdaa12 4056
66e67e41
JB		 4057 if (ifmgd->assoc_data) {
4058 err = -EBUSY;
4059 goto err_free;
4060 }
77fdaa12 4061
66e67e41
JB		 4062 if (ifmgd->auth_data) {
4063 bool match;
4064
4065 /* keep sta info, bssid if matching */
b203ca39 4066 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
66e67e41 4067 ieee80211_destroy_auth_data(sdata, match);
2a33bee2
GE		 4068 }
4069
66e67e41 4070 /* prepare assoc data */
19c3b830 4071
d8ec4433
JO		 4072 ifmgd->beacon_crc_valid = false;
4073
de5036aa
JB		 4074 /*
4075 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4076 * We still associate in non-HT mode (11a/b/g) if any one of these
4077 * ciphers is configured as pairwise.
4078 * We can set this to true for non-11n hardware, that'll be checked
4079 * separately along with the peer capabilities.
4080 */
1c4cb928 4081 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
77fdaa12
JB		 4082 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4083 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
1c4cb928 4084 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
a8243b72 4085 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
d545daba 4086 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
1c4cb928 4087 netdev_info(sdata->dev,
d545daba 4088 "disabling HT/VHT due to WEP/TKIP use\n");
1c4cb928
JB		 4089 }
4090 }
77fdaa12 4091
d545daba 4092 if (req->flags & ASSOC_REQ_DISABLE_HT) {
a8243b72 4093 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
d545daba
MP		 4094 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4095 }
ef96a842 4096
dd5ecfea
JB		 4097 if (req->flags & ASSOC_REQ_DISABLE_VHT)
4098 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4099
4e74bfdb
JB		 4100 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4101 sband = local->hw.wiphy->bands[req->bss->channel->band];
4102 if (!sband->ht_cap.ht_supported ||
1c4cb928 4103 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
a8243b72 4104 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
1b49de26
JB		 4105 if (!bss->wmm_used)
4106 netdev_info(sdata->dev,
4107 "disabling HT as WMM/QoS is not supported by the AP\n");
1c4cb928 4108 }
4e74bfdb 4109
d545daba
MP		 4110 /* disable VHT if we don't support it or the AP doesn't use WMM */
4111 if (!sband->vht_cap.vht_supported ||
4112 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
4113 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
1b49de26
JB		 4114 if (!bss->wmm_used)
4115 netdev_info(sdata->dev,
4116 "disabling VHT as WMM/QoS is not supported by the AP\n");
d545daba
MP		 4117 }
4118
ef96a842
BG		 4119 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4120 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4121 sizeof(ifmgd->ht_capa_mask));
4122
dd5ecfea
JB		 4123 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4124 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4125 sizeof(ifmgd->vht_capa_mask));
4126
77fdaa12 4127 if (req->ie && req->ie_len) {
66e67e41
JB		 4128 memcpy(assoc_data->ie, req->ie, req->ie_len);
4129 assoc_data->ie_len = req->ie_len;
4130 }
f679f65d 4131
66e67e41 4132 assoc_data->bss = req->bss;
f679f65d 4133
af6b6374
JB		 4134 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4135 if (ifmgd->powersave)
04ecd257 4136 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
af6b6374 4137 else
04ecd257 4138 sdata->smps_mode = IEEE80211_SMPS_OFF;
af6b6374 4139 } else
04ecd257 4140 sdata->smps_mode = ifmgd->req_smps;
af6b6374 4141
66e67e41 4142 assoc_data->capability = req->bss->capability;
32c5057b
JB		 4143 assoc_data->wmm = bss->wmm_used &&
4144 (local->hw.queues >= IEEE80211_NUM_ACS);
66e67e41
JB		 4145 assoc_data->supp_rates = bss->supp_rates;
4146 assoc_data->supp_rates_len = bss->supp_rates_len;
9dde6423 4147
9caf0364 4148 rcu_read_lock();
9dde6423
JB		 4149 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4150 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4151 assoc_data->ap_ht_param =
4152 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4153 else
a8243b72 4154 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
b08fbbd8
JB		 4155 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4156 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4157 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4158 sizeof(struct ieee80211_vht_cap));
4159 else
4160 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
9caf0364 4161 rcu_read_unlock();
63f170e0 4162
ab13315a 4163 if (bss->wmm_used && bss->uapsd_supported &&
24aa11ab
AB		 4164 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD) &&
4165 sdata->wmm_acm != 0xff) {
76f0303d 4166 assoc_data->uapsd = true;
ab13315a
KV		 4167 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4168 } else {
76f0303d 4169 assoc_data->uapsd = false;
ab13315a
KV		 4170 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4171 }
4172
77fdaa12 4173 if (req->prev_bssid)
66e67e41 4174 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12
JB		 4175
4176 if (req->use_mfp) {
4177 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4178 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4179 } else {
4180 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4181 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4182 }
4183
4184 if (req->crypto.control_port)
4185 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4186 else
4187 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4188
a621fa4d
JB		 4189 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4190 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4191
66e67e41
JB		 4192 /* kick off associate process */
4193
4194 ifmgd->assoc_data = assoc_data;
826262c3 4195 ifmgd->dtim_period = 0;
66e67e41 4196
a1cf775d
JB		 4197 err = ieee80211_prep_connection(sdata, req->bss, true);
4198 if (err)
4199 goto err_clear;
66e67e41 4200
c65dd147
EG		 4201 rcu_read_lock();
4202 beacon_ies = rcu_dereference(req->bss->beacon_ies);
826262c3 4203
c65dd147
EG		 4204 if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC &&
4205 !beacon_ies) {
4206 /*
4207 * Wait up to one beacon interval ...
4208 * should this be more if we miss one?
4209 */
4210 sdata_info(sdata, "waiting for beacon from %pM\n",
4211 ifmgd->bssid);
4212 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
89afe614 4213 assoc_data->timeout_started = true;
c65dd147
EG		 4214 assoc_data->need_beacon = true;
4215 } else if (beacon_ies) {
4216 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4217 beacon_ies->data,
4218 beacon_ies->len);
ef429dad
JB		 4219 u8 dtim_count = 0;
4220
c65dd147
EG		 4221 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4222 const struct ieee80211_tim_ie *tim;
4223 tim = (void *)(tim_ie + 2);
4224 ifmgd->dtim_period = tim->dtim_period;
ef429dad 4225 dtim_count = tim->dtim_count;
826262c3 4226 }
66e67e41 4227 assoc_data->have_beacon = true;
66e67e41 4228 assoc_data->timeout = jiffies;
89afe614 4229 assoc_data->timeout_started = true;
ef429dad
JB		 4230
4231 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
4232 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4233 sdata->vif.bss_conf.sync_device_ts =
4234 bss->device_ts_beacon;
4235 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4236 }
c65dd147
EG		 4237 } else {
4238 assoc_data->timeout = jiffies;
89afe614 4239 assoc_data->timeout_started = true;
66e67e41 4240 }
c65dd147
EG		 4241 rcu_read_unlock();
4242
8d61ffa5 4243 run_again(sdata, assoc_data->timeout);
66e67e41 4244
fcff4f10
PS		 4245 if (bss->corrupt_data) {
4246 char *corrupt_type = "data";
4247 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4248 if (bss->corrupt_data &
4249 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4250 corrupt_type = "beacon and probe response";
4251 else
4252 corrupt_type = "beacon";
4253 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4254 corrupt_type = "probe response";
bdcbd8e0
JB		 4255 sdata_info(sdata, "associating with AP with corrupt %s\n",
4256 corrupt_type);
fcff4f10
PS		 4257 }
4258
8d61ffa5 4259 return 0;
66e67e41 4260 err_clear:
3d2abdfd
EP		 4261 memset(ifmgd->bssid, 0, ETH_ALEN);
4262 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 4263 ifmgd->assoc_data = NULL;
4264 err_free:
4265 kfree(assoc_data);
66e67e41 4266 return err;
f0706e82
JB		 4267}
4268
77fdaa12 4269int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
63c9c5e7 4270 struct cfg80211_deauth_request *req)
f0706e82 4271{
46900298 4272 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 4273 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
6863255b 4274 bool tx = !req->local_state_change;
de3d43a3 4275 bool report_frame = false;
f0706e82 4276
bdcbd8e0
JB		 4277 sdata_info(sdata,
4278 "deauthenticating from %pM by local choice (reason=%d)\n",
4279 req->bssid, req->reason_code);
0ff71613 4280
86552017 4281 if (ifmgd->auth_data) {
8c7d857c 4282 drv_mgd_prepare_tx(sdata->local, sdata);
37ad3888
JB		 4283 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4284 IEEE80211_STYPE_DEAUTH,
6863255b 4285 req->reason_code, tx,
37ad3888 4286 frame_buf);
86552017 4287 ieee80211_destroy_auth_data(sdata, false);
86552017 4288
de3d43a3 4289 report_frame = true;
86552017 4290 goto out;
8c7d857c
EG		 4291 }
4292
86552017
JB		 4293 if (ifmgd->associated &&
4294 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
4295 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4296 req->reason_code, tx, frame_buf);
de3d43a3 4297 report_frame = true;
86552017 4298 }
37ad3888 4299
86552017 4300 out:
de3d43a3 4301 if (report_frame)
6ff57cf8
JB		 4302 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4303 IEEE80211_DEAUTH_FRAME_LEN);
86552017 4304
f0706e82
JB		 4305 return 0;
4306}
84363e6e 4307
77fdaa12 4308int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 4309 struct cfg80211_disassoc_request *req)
9c6bd790 4310{
77fdaa12 4311 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 4312 u8 bssid[ETH_ALEN];
6ae16775 4313 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
9c6bd790 4314
8d8b261a
JB		 4315 /*
4316 * cfg80211 should catch this ... but it's racy since
4317 * we can receive a disassoc frame, process it, hand it
4318 * to cfg80211 while that's in a locked section already
4319 * trying to tell us that the user wants to disconnect.
4320 */
8d61ffa5 4321 if (ifmgd->associated != req->bss)
77fdaa12 4322 return -ENOLINK;
77fdaa12 4323
bdcbd8e0
JB		 4324 sdata_info(sdata,
4325 "disassociating from %pM by local choice (reason=%d)\n",
4326 req->bss->bssid, req->reason_code);
0ff71613 4327
e69e95db 4328 memcpy(bssid, req->bss->bssid, ETH_ALEN);
37ad3888
JB		 4329 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4330 req->reason_code, !req->local_state_change,
4331 frame_buf);
10f644a4 4332
6ff57cf8
JB		 4333 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4334 IEEE80211_DEAUTH_FRAME_LEN);
bc83b681 4335
10f644a4
JB		 4336 return 0;
4337}
026331c4 4338
afa762f6 4339void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
54e4ffb2
JB		 4340{
4341 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4342
49921859
BG		 4343 /*
4344 * Make sure some work items will not run after this,
4345 * they will not do anything but might not have been
4346 * cancelled when disconnecting.
4347 */
4348 cancel_work_sync(&ifmgd->monitor_work);
4349 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
4350 cancel_work_sync(&ifmgd->request_smps_work);
4351 cancel_work_sync(&ifmgd->csa_connection_drop_work);
4352 cancel_work_sync(&ifmgd->chswitch_work);
4353
8d61ffa5 4354 sdata_lock(sdata);
54e4ffb2
JB		 4355 if (ifmgd->assoc_data)
4356 ieee80211_destroy_assoc_data(sdata, false);
4357 if (ifmgd->auth_data)
4358 ieee80211_destroy_auth_data(sdata, false);
4359 del_timer_sync(&ifmgd->timer);
8d61ffa5 4360 sdata_unlock(sdata);
54e4ffb2
JB		 4361}
4362
a97c13c3
JO		 4363void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
4364 enum nl80211_cqm_rssi_threshold_event rssi_event,
4365 gfp_t gfp)
4366{
4367 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4368
b5878a2d
JB		 4369 trace_api_cqm_rssi_notify(sdata, rssi_event);
4370
a97c13c3
JO		 4371 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
4372}
4373EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
Linux kernel - Deliverables
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