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nl80211: add rate flags for 5/10 Mhz channels
[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
989c6505 1363 if (!mgd->have_beacon)
ce857888
AB		 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
989c6505 1774 if (sdata->u.mgd.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;
817cee76 1782 bss_conf->beacon_rate = bss->beacon_rate;
989c6505 1783 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
826262c3 1784 } else {
817cee76 1785 bss_conf->beacon_rate = NULL;
e5b900d2 1786 bss_conf->dtim_period = 0;
826262c3 1787 }
e5b900d2 1788
68542962 1789 bss_conf->assoc = 1;
9cef8737 1790
a97c13c3 1791 /* Tell the driver to monitor connection quality (if supported) */
ea086359 1792 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
68542962 1793 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 1794 bss_info_changed |= BSS_CHANGED_CQM;
1795
68542962 1796 /* Enable ARP filtering */
0f19b41e 1797 if (bss_conf->arp_addr_cnt)
68542962 1798 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
68542962 1799
ae5eb026 1800 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 1801
056508dc
JB		 1802 mutex_lock(&local->iflist_mtx);
1803 ieee80211_recalc_ps(local, -1);
1804 mutex_unlock(&local->iflist_mtx);
e0cb686f 1805
04ecd257 1806 ieee80211_recalc_smps(sdata);
ab095877
EP		 1807 ieee80211_recalc_ps_vif(sdata);
1808
9ac19a90 1809 netif_carrier_on(sdata->dev);
f0706e82
JB		 1810}
1811
e69e95db 1812static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
37ad3888
JB		 1813 u16 stype, u16 reason, bool tx,
1814 u8 *frame_buf)
aa458d17 1815{
46900298 1816 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17 1817 struct ieee80211_local *local = sdata->local;
3cc5240b 1818 u32 changed = 0;
aa458d17 1819
8d61ffa5 1820 sdata_assert_lock(sdata);
77fdaa12 1821
37ad3888
JB		 1822 if (WARN_ON_ONCE(tx && !frame_buf))
1823 return;
1824
b291ba11
JB		 1825 if (WARN_ON(!ifmgd->associated))
1826 return;
1827
79543d8e
DS		 1828 ieee80211_stop_poll(sdata);
1829
77fdaa12 1830 ifmgd->associated = NULL;
aa458d17
TW		 1831 netif_carrier_off(sdata->dev);
1832
88bc40e8
EP		 1833 /*
1834 * if we want to get out of ps before disassoc (why?) we have
1835 * to do it before sending disassoc, as otherwise the null-packet
1836 * won't be valid.
1837 */
1838 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1839 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1840 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1841 }
1842 local->ps_sdata = NULL;
1843
ab095877
EP		 1844 /* disable per-vif ps */
1845 ieee80211_recalc_ps_vif(sdata);
1846
f823981e
EP		 1847 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1848 if (tx)
39ecc01d 1849 ieee80211_flush_queues(local, sdata);
f823981e 1850
37ad3888
JB		 1851 /* deauthenticate/disassociate now */
1852 if (tx || frame_buf)
88a9e31c
EP		 1853 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
1854 reason, tx, frame_buf);
37ad3888
JB		 1855
1856 /* flush out frame */
1857 if (tx)
39ecc01d 1858 ieee80211_flush_queues(local, sdata);
37ad3888 1859
88a9e31c
EP		 1860 /* clear bssid only after building the needed mgmt frames */
1861 memset(ifmgd->bssid, 0, ETH_ALEN);
1862
37ad3888 1863 /* remove AP and TDLS peers */
051007d9 1864 sta_info_flush_defer(sdata);
37ad3888
JB		 1865
1866 /* finally reset all BSS / config parameters */
f5e5bf25
TW		 1867 changed |= ieee80211_reset_erp_info(sdata);
1868
f5e5bf25 1869 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 1870 changed |= BSS_CHANGED_ASSOC;
1871 sdata->vif.bss_conf.assoc = false;
f5e5bf25 1872
67baf663
JD		 1873 ifmgd->p2p_noa_index = -1;
1874 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
1875 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
488dd7b5 1876
dd5ecfea 1877 /* on the next assoc, re-program HT/VHT parameters */
ef96a842
BG		 1878 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1879 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
dd5ecfea
JB		 1880 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
1881 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
413ad50a 1882
1ea6f9c0 1883 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
a8302de9 1884
520eb820
KV		 1885 del_timer_sync(&local->dynamic_ps_timer);
1886 cancel_work_sync(&local->dynamic_ps_enable_work);
1887
68542962 1888 /* Disable ARP filtering */
0f19b41e 1889 if (sdata->vif.bss_conf.arp_addr_cnt)
68542962 1890 changed |= BSS_CHANGED_ARP_FILTER;
68542962 1891
3abead59
JB		 1892 sdata->vif.bss_conf.qos = false;
1893 changed |= BSS_CHANGED_QOS;
1894
0aaffa9b
JB		 1895 /* The BSSID (not really interesting) and HT changed */
1896 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 1897 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 1898
3abead59
JB		 1899 /* disassociated - set to defaults now */
1900 ieee80211_set_wmm_default(sdata, false);
1901
b9dcf712
JB		 1902 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1903 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1904 del_timer_sync(&sdata->u.mgd.timer);
1905 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2d9957cc 1906
826262c3 1907 sdata->vif.bss_conf.dtim_period = 0;
817cee76
AB		 1908 sdata->vif.bss_conf.beacon_rate = NULL;
1909
989c6505 1910 ifmgd->have_beacon = false;
826262c3 1911
028e8da0
JB		 1912 ifmgd->flags = 0;
1913 ieee80211_vif_release_channel(sdata);
aa458d17 1914}
f0706e82 1915
3cf335d5
KV		 1916void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1917 struct ieee80211_hdr *hdr)
1918{
1919 /*
1920 * We can postpone the mgd.timer whenever receiving unicast frames
1921 * from AP because we know that the connection is working both ways
1922 * at that time. But multicast frames (and hence also beacons) must
1923 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 1924 * data idle periods for sending the periodic probe request to the
1925 * AP we're connected to.
3cf335d5 1926 */
b291ba11
JB		 1927 if (is_multicast_ether_addr(hdr->addr1))
1928 return;
1929
be099e82 1930 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 1931}
f0706e82 1932
4e5ff376
FF		 1933static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1934{
1935 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
133d40f9 1936 struct ieee80211_local *local = sdata->local;
4e5ff376 1937
133d40f9 1938 mutex_lock(&local->mtx);
4e5ff376 1939 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
133d40f9
SG		 1940 IEEE80211_STA_CONNECTION_POLL))) {
1941 mutex_unlock(&local->mtx);
1942 return;
1943 }
4e5ff376 1944
925e64c3 1945 __ieee80211_stop_poll(sdata);
133d40f9
SG		 1946
1947 mutex_lock(&local->iflist_mtx);
1948 ieee80211_recalc_ps(local, -1);
1949 mutex_unlock(&local->iflist_mtx);
4e5ff376
FF		 1950
1951 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
133d40f9 1952 goto out;
4e5ff376
FF		 1953
1954 /*
1955 * We've received a probe response, but are not sure whether
1956 * we have or will be receiving any beacons or data, so let's
1957 * schedule the timers again, just in case.
1958 */
1959 ieee80211_sta_reset_beacon_monitor(sdata);
1960
1961 mod_timer(&ifmgd->conn_mon_timer,
1962 round_jiffies_up(jiffies +
1963 IEEE80211_CONNECTION_IDLE_TIME));
133d40f9 1964out:
133d40f9 1965 mutex_unlock(&local->mtx);
4e5ff376
FF		 1966}
1967
1968void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
04ac3c0e 1969 struct ieee80211_hdr *hdr, bool ack)
4e5ff376 1970{
75706d0e 1971 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF		 1972 return;
1973
4e5ff376
FF		 1974 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1975 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e 1976 if (ack)
cab1c7fd 1977 ieee80211_sta_reset_conn_monitor(sdata);
04ac3c0e
FF		 1978 else
1979 sdata->u.mgd.nullfunc_failed = true;
4e5ff376 1980 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
cab1c7fd 1981 return;
4e5ff376 1982 }
cab1c7fd
WD		 1983
1984 if (ack)
1985 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF		 1986}
1987
a43abf29
ML		 1988static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1989{
1990 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1991 const u8 *ssid;
f01a067d 1992 u8 *dst = ifmgd->associated->bssid;
180205bd 1993 u8 unicast_limit = max(1, max_probe_tries - 3);
f01a067d
LR		 1994
1995 /*
1996 * Try sending broadcast probe requests for the last three
1997 * probe requests after the first ones failed since some
1998 * buggy APs only support broadcast probe requests.
1999 */
2000 if (ifmgd->probe_send_count >= unicast_limit)
2001 dst = NULL;
a43abf29 2002
4e5ff376
FF		 2003 /*
2004 * When the hardware reports an accurate Tx ACK status, it's
2005 * better to send a nullfunc frame instead of a probe request,
2006 * as it will kick us off the AP quickly if we aren't associated
2007 * anymore. The timeout will be reset if the frame is ACKed by
2008 * the AP.
2009 */
992e68bf
SD		 2010 ifmgd->probe_send_count++;
2011
04ac3c0e
FF		 2012 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2013 ifmgd->nullfunc_failed = false;
4e5ff376 2014 ieee80211_send_nullfunc(sdata->local, sdata, 0);
04ac3c0e 2015 } else {
88c868c4
SG		 2016 int ssid_len;
2017
9caf0364 2018 rcu_read_lock();
4e5ff376 2019 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
88c868c4
SG		 2020 if (WARN_ON_ONCE(ssid == NULL))
2021 ssid_len = 0;
2022 else
2023 ssid_len = ssid[1];
2024
2025 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
1672c0e3 2026 0, (u32) -1, true, 0,
55de908a 2027 ifmgd->associated->channel, false);
9caf0364 2028 rcu_read_unlock();
4e5ff376 2029 }
a43abf29 2030
180205bd 2031 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
8d61ffa5 2032 run_again(sdata, ifmgd->probe_timeout);
f69b9c79 2033 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
39ecc01d 2034 ieee80211_flush_queues(sdata->local, sdata);
a43abf29
ML		 2035}
2036
b291ba11
JB		 2037static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2038 bool beacon)
04de8381 2039{
04de8381 2040 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 2041 bool already = false;
34bfc411 2042
9607e6b6 2043 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 2044 return;
2045
8d61ffa5 2046 sdata_lock(sdata);
77fdaa12
JB		 2047
2048 if (!ifmgd->associated)
2049 goto out;
2050
133d40f9
SG		 2051 mutex_lock(&sdata->local->mtx);
2052
2053 if (sdata->local->tmp_channel || sdata->local->scanning) {
2054 mutex_unlock(&sdata->local->mtx);
2055 goto out;
2056 }
2057
a13fbe54 2058 if (beacon) {
bdcbd8e0 2059 mlme_dbg_ratelimited(sdata,
59c1ec2b
BG		 2060 "detected beacon loss from AP (missed %d beacons) - probing\n",
2061 beacon_loss_count);
bdcbd8e0 2062
a13fbe54
BG		 2063 ieee80211_cqm_rssi_notify(&sdata->vif,
2064 NL80211_CQM_RSSI_BEACON_LOSS_EVENT,
2065 GFP_KERNEL);
2066 }
04de8381 2067
b291ba11
JB		 2068 /*
2069 * The driver/our work has already reported this event or the
2070 * connection monitoring has kicked in and we have already sent
2071 * a probe request. Or maybe the AP died and the driver keeps
2072 * reporting until we disassociate...
2073 *
2074 * In either case we have to ignore the current call to this
2075 * function (except for setting the correct probe reason bit)
2076 * because otherwise we would reset the timer every time and
2077 * never check whether we received a probe response!
2078 */
2079 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2080 IEEE80211_STA_CONNECTION_POLL))
2081 already = true;
2082
2083 if (beacon)
2084 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
2085 else
2086 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2087
133d40f9
SG		 2088 mutex_unlock(&sdata->local->mtx);
2089
b291ba11
JB		 2090 if (already)
2091 goto out;
2092
4e751843
JB		 2093 mutex_lock(&sdata->local->iflist_mtx);
2094 ieee80211_recalc_ps(sdata->local, -1);
2095 mutex_unlock(&sdata->local->iflist_mtx);
2096
a43abf29
ML		 2097 ifmgd->probe_send_count = 0;
2098 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12 2099 out:
8d61ffa5 2100 sdata_unlock(sdata);
04de8381
KV		 2101}
2102
a619a4c0
JO		 2103struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2104 struct ieee80211_vif *vif)
2105{
2106 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2107 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d9b3b28b 2108 struct cfg80211_bss *cbss;
a619a4c0
JO		 2109 struct sk_buff *skb;
2110 const u8 *ssid;
88c868c4 2111 int ssid_len;
a619a4c0
JO		 2112
2113 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2114 return NULL;
2115
8d61ffa5 2116 sdata_assert_lock(sdata);
a619a4c0 2117
d9b3b28b
EP		 2118 if (ifmgd->associated)
2119 cbss = ifmgd->associated;
2120 else if (ifmgd->auth_data)
2121 cbss = ifmgd->auth_data->bss;
2122 else if (ifmgd->assoc_data)
2123 cbss = ifmgd->assoc_data->bss;
2124 else
a619a4c0
JO		 2125 return NULL;
2126
9caf0364 2127 rcu_read_lock();
d9b3b28b 2128 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
88c868c4
SG		 2129 if (WARN_ON_ONCE(ssid == NULL))
2130 ssid_len = 0;
2131 else
2132 ssid_len = ssid[1];
2133
d9b3b28b 2134 skb = ieee80211_build_probe_req(sdata, cbss->bssid,
55de908a 2135 (u32) -1, cbss->channel,
6b77863b 2136 ssid + 2, ssid_len,
85a237fe 2137 NULL, 0, true);
9caf0364 2138 rcu_read_unlock();
a619a4c0
JO		 2139
2140 return skb;
2141}
2142EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2143
eef9e54c 2144static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
1e4dcd01
JO		 2145{
2146 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 2147 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
1e4dcd01 2148
8d61ffa5 2149 sdata_lock(sdata);
1e4dcd01 2150 if (!ifmgd->associated) {
8d61ffa5 2151 sdata_unlock(sdata);
1e4dcd01
JO		 2152 return;
2153 }
2154
37ad3888
JB		 2155 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2156 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
eef9e54c 2157 true, frame_buf);
882a7c69 2158 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
5b36ebd8 2159 ieee80211_wake_queues_by_reason(&sdata->local->hw,
445ea4e8 2160 IEEE80211_MAX_QUEUE_MAP,
5b36ebd8 2161 IEEE80211_QUEUE_STOP_REASON_CSA);
7da7cc1d 2162
6ff57cf8
JB		 2163 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
2164 IEEE80211_DEAUTH_FRAME_LEN);
8d61ffa5 2165 sdata_unlock(sdata);
1e4dcd01
JO		 2166}
2167
cc74c0c7 2168static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 2169{
2170 struct ieee80211_sub_if_data *sdata =
2171 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 2172 u.mgd.beacon_connection_loss_work);
a85e1d55
PS		 2173 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2174 struct sta_info *sta;
2175
2176 if (ifmgd->associated) {
30fa9047 2177 rcu_read_lock();
a85e1d55
PS		 2178 sta = sta_info_get(sdata, ifmgd->bssid);
2179 if (sta)
2180 sta->beacon_loss_count++;
30fa9047 2181 rcu_read_unlock();
a85e1d55 2182 }
b291ba11 2183
682bd38b 2184 if (ifmgd->connection_loss) {
882a7c69
JB		 2185 sdata_info(sdata, "Connection to AP %pM lost\n",
2186 ifmgd->bssid);
eef9e54c 2187 __ieee80211_disconnect(sdata);
882a7c69 2188 } else {
1e4dcd01 2189 ieee80211_mgd_probe_ap(sdata, true);
882a7c69
JB		 2190 }
2191}
2192
2193static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2194{
2195 struct ieee80211_sub_if_data *sdata =
2196 container_of(work, struct ieee80211_sub_if_data,
2197 u.mgd.csa_connection_drop_work);
2198
eef9e54c 2199 __ieee80211_disconnect(sdata);
b291ba11
JB		 2200}
2201
04de8381
KV		 2202void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2203{
2204 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 2205 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 2206
b5878a2d
JB		 2207 trace_api_beacon_loss(sdata);
2208
682bd38b 2209 sdata->u.mgd.connection_loss = false;
1e4dcd01 2210 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 2211}
2212EXPORT_SYMBOL(ieee80211_beacon_loss);
2213
1e4dcd01
JO		 2214void ieee80211_connection_loss(struct ieee80211_vif *vif)
2215{
2216 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2217 struct ieee80211_hw *hw = &sdata->local->hw;
2218
b5878a2d
JB		 2219 trace_api_connection_loss(sdata);
2220
682bd38b 2221 sdata->u.mgd.connection_loss = true;
1e4dcd01
JO		 2222 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2223}
2224EXPORT_SYMBOL(ieee80211_connection_loss);
2225
2226
66e67e41
JB		 2227static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2228 bool assoc)
2229{
2230 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2231
8d61ffa5 2232 sdata_assert_lock(sdata);
66e67e41 2233
66e67e41
JB		 2234 if (!assoc) {
2235 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2236
2237 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2238 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
028e8da0 2239 sdata->u.mgd.flags = 0;
55de908a 2240 ieee80211_vif_release_channel(sdata);
66e67e41
JB		 2241 }
2242
5b112d3d 2243 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
66e67e41
JB		 2244 kfree(auth_data);
2245 sdata->u.mgd.auth_data = NULL;
2246}
2247
2248static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2249 struct ieee80211_mgmt *mgmt, size_t len)
2250{
1672c0e3 2251 struct ieee80211_local *local = sdata->local;
66e67e41
JB		 2252 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2253 u8 *pos;
2254 struct ieee802_11_elems elems;
1672c0e3 2255 u32 tx_flags = 0;
66e67e41
JB		 2256
2257 pos = mgmt->u.auth.variable;
b2e506bf 2258 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
66e67e41
JB		 2259 if (!elems.challenge)
2260 return;
2261 auth_data->expected_transaction = 4;
a1845fc7 2262 drv_mgd_prepare_tx(sdata->local, sdata);
1672c0e3
JB		 2263 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2264 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2265 IEEE80211_TX_INTFL_MLME_CONN_TX;
700e8ea6 2266 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
66e67e41
JB		 2267 elems.challenge - 2, elems.challenge_len + 2,
2268 auth_data->bss->bssid, auth_data->bss->bssid,
2269 auth_data->key, auth_data->key_len,
1672c0e3 2270 auth_data->key_idx, tx_flags);
66e67e41
JB		 2271}
2272
8d61ffa5
JB		 2273static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2274 struct ieee80211_mgmt *mgmt, size_t len)
66e67e41
JB		 2275{
2276 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2277 u8 bssid[ETH_ALEN];
2278 u16 auth_alg, auth_transaction, status_code;
2279 struct sta_info *sta;
2280
8d61ffa5 2281 sdata_assert_lock(sdata);
66e67e41
JB		 2282
2283 if (len < 24 + 6)
8d61ffa5 2284 return;
66e67e41
JB		 2285
2286 if (!ifmgd->auth_data || ifmgd->auth_data->done)
8d61ffa5 2287 return;
66e67e41
JB		 2288
2289 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2290
b203ca39 2291 if (!ether_addr_equal(bssid, mgmt->bssid))
8d61ffa5 2292 return;
66e67e41
JB		 2293
2294 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2295 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2296 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2297
2298 if (auth_alg != ifmgd->auth_data->algorithm ||
0f4126e8
JM		 2299 auth_transaction != ifmgd->auth_data->expected_transaction) {
2300 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2301 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2302 auth_transaction,
2303 ifmgd->auth_data->expected_transaction);
8d61ffa5 2304 return;
0f4126e8 2305 }
66e67e41
JB		 2306
2307 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2308 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2309 mgmt->sa, status_code);
dac211ec 2310 ieee80211_destroy_auth_data(sdata, false);
6ff57cf8 2311 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
8d61ffa5 2312 return;
66e67e41
JB		 2313 }
2314
2315 switch (ifmgd->auth_data->algorithm) {
2316 case WLAN_AUTH_OPEN:
2317 case WLAN_AUTH_LEAP:
2318 case WLAN_AUTH_FT:
6b8ece3a 2319 case WLAN_AUTH_SAE:
66e67e41
JB		 2320 break;
2321 case WLAN_AUTH_SHARED_KEY:
2322 if (ifmgd->auth_data->expected_transaction != 4) {
2323 ieee80211_auth_challenge(sdata, mgmt, len);
2324 /* need another frame */
8d61ffa5 2325 return;
66e67e41
JB		 2326 }
2327 break;
2328 default:
2329 WARN_ONCE(1, "invalid auth alg %d",
2330 ifmgd->auth_data->algorithm);
8d61ffa5 2331 return;
66e67e41
JB		 2332 }
2333
bdcbd8e0 2334 sdata_info(sdata, "authenticated\n");
66e67e41
JB		 2335 ifmgd->auth_data->done = true;
2336 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
89afe614 2337 ifmgd->auth_data->timeout_started = true;
8d61ffa5 2338 run_again(sdata, ifmgd->auth_data->timeout);
66e67e41 2339
6b8ece3a
JM		 2340 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2341 ifmgd->auth_data->expected_transaction != 2) {
2342 /*
2343 * Report auth frame to user space for processing since another
2344 * round of Authentication frames is still needed.
2345 */
6ff57cf8 2346 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
8d61ffa5 2347 return;
6b8ece3a
JM		 2348 }
2349
66e67e41
JB		 2350 /* move station state to auth */
2351 mutex_lock(&sdata->local->sta_mtx);
2352 sta = sta_info_get(sdata, bssid);
2353 if (!sta) {
2354 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2355 goto out_err;
2356 }
2357 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
bdcbd8e0 2358 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
66e67e41
JB		 2359 goto out_err;
2360 }
2361 mutex_unlock(&sdata->local->sta_mtx);
2362
6ff57cf8 2363 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
8d61ffa5 2364 return;
66e67e41
JB		 2365 out_err:
2366 mutex_unlock(&sdata->local->sta_mtx);
2367 /* ignore frame -- wait for timeout */
66e67e41
JB		 2368}
2369
2370
8d61ffa5
JB		 2371static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2372 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2373{
46900298 2374 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 2375 const u8 *bssid = NULL;
f0706e82
JB		 2376 u16 reason_code;
2377
8d61ffa5 2378 sdata_assert_lock(sdata);
66e67e41 2379
f4ea83dd 2380 if (len < 24 + 2)
8d61ffa5 2381 return;
f0706e82 2382
66e67e41 2383 if (!ifmgd->associated ||
b203ca39 2384 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
8d61ffa5 2385 return;
77fdaa12 2386
0c1ad2ca 2387 bssid = ifmgd->associated->bssid;
f0706e82
JB		 2388
2389 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2390
bdcbd8e0
JB		 2391 sdata_info(sdata, "deauthenticated from %pM (Reason: %u)\n",
2392 bssid, reason_code);
77fdaa12 2393
37ad3888
JB		 2394 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2395
6ff57cf8 2396 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
f0706e82
JB		 2397}
2398
2399
8d61ffa5
JB		 2400static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2401 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2402{
46900298 2403 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 2404 u16 reason_code;
2405
8d61ffa5 2406 sdata_assert_lock(sdata);
77fdaa12 2407
66e67e41 2408 if (len < 24 + 2)
8d61ffa5 2409 return;
77fdaa12 2410
66e67e41 2411 if (!ifmgd->associated ||
b203ca39 2412 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
8d61ffa5 2413 return;
f0706e82
JB		 2414
2415 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2416
bdcbd8e0
JB		 2417 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2418 mgmt->sa, reason_code);
f0706e82 2419
37ad3888
JB		 2420 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2421
6ff57cf8 2422 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
f0706e82
JB		 2423}
2424
c74d084f
CL		 2425static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2426 u8 *supp_rates, unsigned int supp_rates_len,
2427 u32 *rates, u32 *basic_rates,
2428 bool *have_higher_than_11mbit,
2429 int *min_rate, int *min_rate_index)
2430{
2431 int i, j;
2432
2433 for (i = 0; i < supp_rates_len; i++) {
2434 int rate = (supp_rates[i] & 0x7f) * 5;
2435 bool is_basic = !!(supp_rates[i] & 0x80);
2436
2437 if (rate > 110)
2438 *have_higher_than_11mbit = true;
2439
2440 /*
2441 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2442 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2443 *
2444 * Note: Even through the membership selector and the basic
2445 * rate flag share the same bit, they are not exactly
2446 * the same.
2447 */
2448 if (!!(supp_rates[i] & 0x80) &&
2449 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2450 continue;
2451
2452 for (j = 0; j < sband->n_bitrates; j++) {
2453 if (sband->bitrates[j].bitrate == rate) {
2454 *rates |= BIT(j);
2455 if (is_basic)
2456 *basic_rates |= BIT(j);
2457 if (rate < *min_rate) {
2458 *min_rate = rate;
2459 *min_rate_index = j;
2460 }
2461 break;
2462 }
2463 }
2464 }
2465}
f0706e82 2466
66e67e41
JB		 2467static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2468 bool assoc)
2469{
2470 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2471
8d61ffa5 2472 sdata_assert_lock(sdata);
66e67e41 2473
66e67e41
JB		 2474 if (!assoc) {
2475 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2476
2477 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2478 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
028e8da0 2479 sdata->u.mgd.flags = 0;
55de908a 2480 ieee80211_vif_release_channel(sdata);
66e67e41
JB		 2481 }
2482
2483 kfree(assoc_data);
2484 sdata->u.mgd.assoc_data = NULL;
2485}
2486
2487static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2488 struct cfg80211_bss *cbss,
af6b6374 2489 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2490{
46900298 2491 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 2492 struct ieee80211_local *local = sdata->local;
8318d78a 2493 struct ieee80211_supported_band *sband;
f0706e82 2494 struct sta_info *sta;
af6b6374 2495 u8 *pos;
af6b6374 2496 u16 capab_info, aid;
f0706e82 2497 struct ieee802_11_elems elems;
bda3933a 2498 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
ae5eb026 2499 u32 changed = 0;
c74d084f 2500 int err;
f0706e82 2501
af6b6374 2502 /* AssocResp and ReassocResp have identical structure */
f0706e82 2503
f0706e82 2504 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 2505 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 2506
1dd84aa2 2507 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
bdcbd8e0
JB		 2508 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2509 aid);
1dd84aa2
JB		 2510 aid &= ~(BIT(15) | BIT(14));
2511
05cb9108
JB		 2512 ifmgd->broken_ap = false;
2513
2514 if (aid == 0 || aid > IEEE80211_MAX_AID) {
bdcbd8e0
JB		 2515 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2516 aid);
05cb9108
JB		 2517 aid = 0;
2518 ifmgd->broken_ap = true;
2519 }
2520
af6b6374 2521 pos = mgmt->u.assoc_resp.variable;
b2e506bf 2522 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
af6b6374 2523
f0706e82 2524 if (!elems.supp_rates) {
bdcbd8e0 2525 sdata_info(sdata, "no SuppRates element in AssocResp\n");
af6b6374 2526 return false;
f0706e82
JB		 2527 }
2528
46900298 2529 ifmgd->aid = aid;
f0706e82 2530
30eb1dc2
JB		 2531 /*
2532 * We previously checked these in the beacon/probe response, so
2533 * they should be present here. This is just a safety net.
2534 */
2535 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2536 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2537 sdata_info(sdata,
2538 "HT AP is missing WMM params or HT capability/operation in AssocResp\n");
2539 return false;
2540 }
2541
2542 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2543 (!elems.vht_cap_elem || !elems.vht_operation)) {
2544 sdata_info(sdata,
2545 "VHT AP is missing VHT capability/operation in AssocResp\n");
2546 return false;
2547 }
2548
2a33bee2
GE		 2549 mutex_lock(&sdata->local->sta_mtx);
2550 /*
2551 * station info was already allocated and inserted before
2552 * the association and should be available to us
2553 */
7852e361 2554 sta = sta_info_get(sdata, cbss->bssid);
2a33bee2
GE		 2555 if (WARN_ON(!sta)) {
2556 mutex_unlock(&sdata->local->sta_mtx);
af6b6374 2557 return false;
77fdaa12 2558 }
05e5e883 2559
55de908a 2560 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
f709fc69 2561
30eb1dc2 2562 /* Set up internal HT/VHT capabilities */
a8243b72 2563 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
ef96a842 2564 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
e1a0c6b3 2565 elems.ht_cap_elem, sta);
64f68e5d 2566
818255ea
MP		 2567 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2568 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
4a34215e 2569 elems.vht_cap_elem, sta);
818255ea 2570
30eb1dc2
JB		 2571 /*
2572 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
2573 * in their association response, so ignore that data for our own
2574 * configuration. If it changed since the last beacon, we'll get the
2575 * next beacon and update then.
2576 */
1128958d 2577
bee7f586
JB		 2578 /*
2579 * If an operating mode notification IE is present, override the
2580 * NSS calculation (that would be done in rate_control_rate_init())
2581 * and use the # of streams from that element.
2582 */
2583 if (elems.opmode_notif &&
2584 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
2585 u8 nss;
2586
2587 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
2588 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
2589 nss += 1;
2590 sta->sta.rx_nss = nss;
2591 }
2592
4b7679a5 2593 rate_control_rate_init(sta);
f0706e82 2594
46900298 2595 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
c2c98fde 2596 set_sta_flag(sta, WLAN_STA_MFP);
5394af4d 2597
ddf4ac53 2598 if (elems.wmm_param)
c2c98fde 2599 set_sta_flag(sta, WLAN_STA_WME);
ddf4ac53 2600
3e4d40fa 2601 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
c8987876
JB		 2602 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2603 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2604 if (err) {
bdcbd8e0
JB		 2605 sdata_info(sdata,
2606 "failed to move station %pM to desired state\n",
2607 sta->sta.addr);
c8987876
JB		 2608 WARN_ON(__sta_info_destroy(sta));
2609 mutex_unlock(&sdata->local->sta_mtx);
2610 return false;
2611 }
2612
7852e361 2613 mutex_unlock(&sdata->local->sta_mtx);
ddf4ac53 2614
f2176d72
JO		 2615 /*
2616 * Always handle WMM once after association regardless
2617 * of the first value the AP uses. Setting -1 here has
2618 * that effect because the AP values is an unsigned
2619 * 4-bit value.
2620 */
2621 ifmgd->wmm_last_param_set = -1;
2622
ddf4ac53 2623 if (elems.wmm_param)
4ced3f74 2624 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 2625 elems.wmm_param_len);
aa837e1d 2626 else
3abead59
JB		 2627 ieee80211_set_wmm_default(sdata, false);
2628 changed |= BSS_CHANGED_QOS;
f0706e82 2629
60f8b39c
JB		 2630 /* set AID and assoc capability,
2631 * ieee80211_set_associated() will tell the driver */
2632 bss_conf->aid = aid;
2633 bss_conf->assoc_capability = capab_info;
0c1ad2ca 2634 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 2635
d524215f
FF		 2636 /*
2637 * If we're using 4-addr mode, let the AP know that we're
2638 * doing so, so that it can create the STA VLAN on its side
2639 */
2640 if (ifmgd->use_4addr)
2641 ieee80211_send_4addr_nullfunc(local, sdata);
2642
15b7b062 2643 /*
b291ba11
JB		 2644 * Start timer to probe the connection to the AP now.
2645 * Also start the timer that will detect beacon loss.
15b7b062 2646 */
b291ba11 2647 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 2648 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 2649
af6b6374 2650 return true;
f0706e82
JB		 2651}
2652
8d61ffa5
JB		 2653static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2654 struct ieee80211_mgmt *mgmt,
2655 size_t len)
66e67e41
JB		 2656{
2657 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2658 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2659 u16 capab_info, status_code, aid;
2660 struct ieee802_11_elems elems;
2661 u8 *pos;
2662 bool reassoc;
8d61ffa5 2663 struct cfg80211_bss *bss;
66e67e41 2664
8d61ffa5 2665 sdata_assert_lock(sdata);
66e67e41
JB		 2666
2667 if (!assoc_data)
8d61ffa5 2668 return;
b203ca39 2669 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
8d61ffa5 2670 return;
66e67e41
JB		 2671
2672 /*
2673 * AssocResp and ReassocResp have identical structure, so process both
2674 * of them in this function.
2675 */
2676
2677 if (len < 24 + 6)
8d61ffa5 2678 return;
66e67e41
JB		 2679
2680 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2681 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2682 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2683 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2684
bdcbd8e0
JB		 2685 sdata_info(sdata,
2686 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2687 reassoc ? "Rea" : "A", mgmt->sa,
2688 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
66e67e41
JB		 2689
2690 pos = mgmt->u.assoc_resp.variable;
b2e506bf 2691 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
66e67e41
JB		 2692
2693 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
79ba1d89
JB		 2694 elems.timeout_int &&
2695 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
66e67e41 2696 u32 tu, ms;
79ba1d89 2697 tu = le32_to_cpu(elems.timeout_int->value);
66e67e41 2698 ms = tu * 1024 / 1000;
bdcbd8e0
JB		 2699 sdata_info(sdata,
2700 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2701 mgmt->sa, tu, ms);
66e67e41 2702 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
89afe614 2703 assoc_data->timeout_started = true;
66e67e41 2704 if (ms > IEEE80211_ASSOC_TIMEOUT)
8d61ffa5
JB		 2705 run_again(sdata, assoc_data->timeout);
2706 return;
66e67e41
JB		 2707 }
2708
8d61ffa5 2709 bss = assoc_data->bss;
66e67e41
JB		 2710
2711 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2712 sdata_info(sdata, "%pM denied association (code=%d)\n",
2713 mgmt->sa, status_code);
66e67e41
JB		 2714 ieee80211_destroy_assoc_data(sdata, false);
2715 } else {
8d61ffa5 2716 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
66e67e41 2717 /* oops -- internal error -- send timeout for now */
10a9109f 2718 ieee80211_destroy_assoc_data(sdata, false);
8d61ffa5 2719 cfg80211_put_bss(sdata->local->hw.wiphy, bss);
6ff57cf8 2720 cfg80211_assoc_timeout(sdata->dev, mgmt->bssid);
8d61ffa5 2721 return;
66e67e41 2722 }
635d999f 2723 sdata_info(sdata, "associated\n");
79ebfb85
JB		 2724
2725 /*
2726 * destroy assoc_data afterwards, as otherwise an idle
2727 * recalc after assoc_data is NULL but before associated
2728 * is set can cause the interface to go idle
2729 */
2730 ieee80211_destroy_assoc_data(sdata, true);
66e67e41
JB		 2731 }
2732
6ff57cf8 2733 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len);
66e67e41 2734}
8e3c1b77 2735
98c8fccf 2736static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
8e3c1b77 2737 struct ieee80211_mgmt *mgmt, size_t len,
98c8fccf 2738 struct ieee80211_rx_status *rx_status,
d45c4172 2739 struct ieee802_11_elems *elems)
98c8fccf
JB		 2740{
2741 struct ieee80211_local *local = sdata->local;
2742 int freq;
c2b13452 2743 struct ieee80211_bss *bss;
98c8fccf 2744 struct ieee80211_channel *channel;
56007a02 2745
8d61ffa5 2746 sdata_assert_lock(sdata);
b4f286a1 2747
1cd8e88e 2748 if (elems->ds_params)
59eb21a6
BR		 2749 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
2750 rx_status->band);
98c8fccf
JB		 2751 else
2752 freq = rx_status->freq;
2753
2754 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2755
2756 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2757 return;
2758
98c8fccf 2759 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
d45c4172 2760 channel);
817cee76 2761 if (bss) {
77fdaa12 2762 ieee80211_rx_bss_put(local, bss);
817cee76
AB		 2763 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
2764 }
77fdaa12 2765
37799e52
JB		 2766 if (!sdata->u.mgd.associated ||
2767 !ether_addr_equal(mgmt->bssid, sdata->u.mgd.associated->bssid))
98c8fccf
JB		 2768 return;
2769
04a161f4
JB		 2770 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
2771 elems, true);
b4f286a1 2772
f0706e82
JB		 2773}
2774
2775
f698d856 2776static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 2777 struct sk_buff *skb)
f0706e82 2778{
af6b6374 2779 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 2780 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 2781 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2782 size_t baselen, len = skb->len;
ae6a44e3
EK		 2783 struct ieee802_11_elems elems;
2784
15b7b062
KV		 2785 ifmgd = &sdata->u.mgd;
2786
8d61ffa5 2787 sdata_assert_lock(sdata);
77fdaa12 2788
b203ca39 2789 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
8e7cdbb6
TW		 2790 return; /* ignore ProbeResp to foreign address */
2791
ae6a44e3
EK		 2792 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2793 if (baselen > len)
2794 return;
2795
2796 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
b2e506bf 2797 false, &elems);
ae6a44e3 2798
d45c4172 2799 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
9859b81e 2800
77fdaa12 2801 if (ifmgd->associated &&
b203ca39 2802 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
4e5ff376 2803 ieee80211_reset_ap_probe(sdata);
66e67e41
JB		 2804
2805 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
b203ca39 2806 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
66e67e41 2807 /* got probe response, continue with auth */
bdcbd8e0 2808 sdata_info(sdata, "direct probe responded\n");
66e67e41
JB		 2809 ifmgd->auth_data->tries = 0;
2810 ifmgd->auth_data->timeout = jiffies;
89afe614 2811 ifmgd->auth_data->timeout_started = true;
8d61ffa5 2812 run_again(sdata, ifmgd->auth_data->timeout);
66e67e41 2813 }
f0706e82
JB		 2814}
2815
d91f36db
JB		 2816/*
2817 * This is the canonical list of information elements we care about,
2818 * the filter code also gives us all changes to the Microsoft OUI
2819 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2820 *
2821 * We implement beacon filtering in software since that means we can
2822 * avoid processing the frame here and in cfg80211, and userspace
2823 * will not be able to tell whether the hardware supports it or not.
2824 *
2825 * XXX: This list needs to be dynamic -- userspace needs to be able to
2826 * add items it requires. It also needs to be able to tell us to
2827 * look out for other vendor IEs.
2828 */
2829static const u64 care_about_ies =
1d4df3a5
JB		 2830 (1ULL << WLAN_EID_COUNTRY) |
2831 (1ULL << WLAN_EID_ERP_INFO) |
2832 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2833 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2834 (1ULL << WLAN_EID_HT_CAPABILITY) |
074d46d1 2835 (1ULL << WLAN_EID_HT_OPERATION);
d91f36db 2836
8d61ffa5
JB		 2837static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
2838 struct ieee80211_mgmt *mgmt, size_t len,
2839 struct ieee80211_rx_status *rx_status)
f0706e82 2840{
d91f36db 2841 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 2842 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 2843 size_t baselen;
2844 struct ieee802_11_elems elems;
f698d856 2845 struct ieee80211_local *local = sdata->local;
55de908a
JB		 2846 struct ieee80211_chanctx_conf *chanctx_conf;
2847 struct ieee80211_channel *chan;
bee7f586 2848 struct sta_info *sta;
471b3efd 2849 u32 changed = 0;
f87ad637 2850 bool erp_valid;
7a5158ef 2851 u8 erp_value = 0;
d91f36db 2852 u32 ncrc;
77fdaa12 2853 u8 *bssid;
8d61ffa5 2854 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
77fdaa12 2855
8d61ffa5 2856 sdata_assert_lock(sdata);
f0706e82 2857
ae6a44e3
EK		 2858 /* Process beacon from the current BSS */
2859 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2860 if (baselen > len)
8d61ffa5 2861 return;
ae6a44e3 2862
55de908a
JB		 2863 rcu_read_lock();
2864 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2865 if (!chanctx_conf) {
2866 rcu_read_unlock();
8d61ffa5 2867 return;
55de908a
JB		 2868 }
2869
4bf88530 2870 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
55de908a 2871 rcu_read_unlock();
8d61ffa5 2872 return;
55de908a 2873 }
4bf88530 2874 chan = chanctx_conf->def.chan;
55de908a 2875 rcu_read_unlock();
f0706e82 2876
c65dd147 2877 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
b203ca39 2878 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
66e67e41 2879 ieee802_11_parse_elems(mgmt->u.beacon.variable,
b2e506bf 2880 len - baselen, false, &elems);
77fdaa12 2881
d45c4172 2882 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
482a9c74
AB		 2883 if (elems.tim && !elems.parse_error) {
2884 const struct ieee80211_tim_ie *tim_ie = elems.tim;
2885 ifmgd->dtim_period = tim_ie->dtim_period;
2886 }
989c6505 2887 ifmgd->have_beacon = true;
c65dd147 2888 ifmgd->assoc_data->need_beacon = false;
ef429dad
JB		 2889 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
2890 sdata->vif.bss_conf.sync_tsf =
2891 le64_to_cpu(mgmt->u.beacon.timestamp);
2892 sdata->vif.bss_conf.sync_device_ts =
2893 rx_status->device_timestamp;
2894 if (elems.tim)
2895 sdata->vif.bss_conf.sync_dtim_count =
2896 elems.tim->dtim_count;
2897 else
2898 sdata->vif.bss_conf.sync_dtim_count = 0;
2899 }
66e67e41
JB		 2900 /* continue assoc process */
2901 ifmgd->assoc_data->timeout = jiffies;
89afe614 2902 ifmgd->assoc_data->timeout_started = true;
8d61ffa5
JB		 2903 run_again(sdata, ifmgd->assoc_data->timeout);
2904 return;
66e67e41 2905 }
77fdaa12 2906
66e67e41 2907 if (!ifmgd->associated ||
b203ca39 2908 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
8d61ffa5 2909 return;
66e67e41 2910 bssid = ifmgd->associated->bssid;
f0706e82 2911
17e4ec14
JM		 2912 /* Track average RSSI from the Beacon frames of the current AP */
2913 ifmgd->last_beacon_signal = rx_status->signal;
2914 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
2915 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3ba06c6f 2916 ifmgd->ave_beacon_signal = rx_status->signal * 16;
17e4ec14 2917 ifmgd->last_cqm_event_signal = 0;
391a200a 2918 ifmgd->count_beacon_signal = 1;
615f7b9b 2919 ifmgd->last_ave_beacon_signal = 0;
17e4ec14
JM		 2920 } else {
2921 ifmgd->ave_beacon_signal =
2922 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
2923 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
2924 ifmgd->ave_beacon_signal) / 16;
391a200a 2925 ifmgd->count_beacon_signal++;
17e4ec14 2926 }
615f7b9b
MV		 2927
2928 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
2929 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
2930 int sig = ifmgd->ave_beacon_signal;
2931 int last_sig = ifmgd->last_ave_beacon_signal;
2932
2933 /*
2934 * if signal crosses either of the boundaries, invoke callback
2935 * with appropriate parameters
2936 */
2937 if (sig > ifmgd->rssi_max_thold &&
2938 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
2939 ifmgd->last_ave_beacon_signal = sig;
887da917 2940 drv_rssi_callback(local, sdata, RSSI_EVENT_HIGH);
615f7b9b
MV		 2941 } else if (sig < ifmgd->rssi_min_thold &&
2942 (last_sig >= ifmgd->rssi_max_thold ||
2943 last_sig == 0)) {
2944 ifmgd->last_ave_beacon_signal = sig;
887da917 2945 drv_rssi_callback(local, sdata, RSSI_EVENT_LOW);
615f7b9b
MV		 2946 }
2947 }
2948
17e4ec14 2949 if (bss_conf->cqm_rssi_thold &&
391a200a 2950 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
ea086359 2951 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
17e4ec14
JM		 2952 int sig = ifmgd->ave_beacon_signal / 16;
2953 int last_event = ifmgd->last_cqm_event_signal;
2954 int thold = bss_conf->cqm_rssi_thold;
2955 int hyst = bss_conf->cqm_rssi_hyst;
2956 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_LOW,
2962 GFP_KERNEL);
2963 } else if (sig > thold &&
2964 (last_event == 0 || sig > last_event + hyst)) {
2965 ifmgd->last_cqm_event_signal = sig;
2966 ieee80211_cqm_rssi_notify(
2967 &sdata->vif,
2968 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
2969 GFP_KERNEL);
2970 }
2971 }
2972
b291ba11 2973 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
bdcbd8e0 2974 mlme_dbg_ratelimited(sdata,
112c31f0 2975 "cancelling AP probe due to a received beacon\n");
925e64c3 2976 mutex_lock(&local->mtx);
b291ba11 2977 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
925e64c3
SG		 2978 ieee80211_run_deferred_scan(local);
2979 mutex_unlock(&local->mtx);
2980
4e751843
JB		 2981 mutex_lock(&local->iflist_mtx);
2982 ieee80211_recalc_ps(local, -1);
2983 mutex_unlock(&local->iflist_mtx);
92778180
JM		 2984 }
2985
b291ba11
JB		 2986 /*
2987 * Push the beacon loss detection into the future since
2988 * we are processing a beacon from the AP just now.
2989 */
d3a910a8 2990 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 2991
d91f36db
JB		 2992 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
2993 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
b2e506bf 2994 len - baselen, false, &elems,
d91f36db
JB		 2995 care_about_ies, ncrc);
2996
25c9c875 2997 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
f87ad637
RR		 2998 bool directed_tim = ieee80211_check_tim(elems.tim,
2999 elems.tim_len,
3000 ifmgd->aid);
1fb3606b 3001 if (directed_tim) {
572e0012 3002 if (local->hw.conf.dynamic_ps_timeout > 0) {
70b12f26
RW		 3003 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3004 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3005 ieee80211_hw_config(local,
3006 IEEE80211_CONF_CHANGE_PS);
3007 }
572e0012 3008 ieee80211_send_nullfunc(local, sdata, 0);
6f0756a3 3009 } else if (!local->pspolling && sdata->u.mgd.powersave) {
572e0012
KV		 3010 local->pspolling = true;
3011
3012 /*
3013 * Here is assumed that the driver will be
3014 * able to send ps-poll frame and receive a
3015 * response even though power save mode is
3016 * enabled, but some drivers might require
3017 * to disable power save here. This needs
3018 * to be investigated.
3019 */
3020 ieee80211_send_pspoll(local, sdata);
3021 }
a97b77b9
VN		 3022 }
3023 }
7a5158ef 3024
488dd7b5 3025 if (sdata->vif.p2p) {
67baf663 3026 struct ieee80211_p2p_noa_attr noa = {};
488dd7b5
JB		 3027 int ret;
3028
3029 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3030 len - baselen,
3031 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
934457ee 3032 (u8 *) &noa, sizeof(noa));
67baf663
JD		 3033 if (ret >= 2) {
3034 if (sdata->u.mgd.p2p_noa_index != noa.index) {
3035 /* valid noa_attr and index changed */
3036 sdata->u.mgd.p2p_noa_index = noa.index;
3037 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3038 changed |= BSS_CHANGED_P2P_PS;
3039 /*
3040 * make sure we update all information, the CRC
3041 * mechanism doesn't look at P2P attributes.
3042 */
3043 ifmgd->beacon_crc_valid = false;
3044 }
3045 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3046 /* noa_attr not found and we had valid noa_attr before */
3047 sdata->u.mgd.p2p_noa_index = -1;
3048 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
488dd7b5 3049 changed |= BSS_CHANGED_P2P_PS;
488dd7b5
JB		 3050 ifmgd->beacon_crc_valid = false;
3051 }
3052 }
3053
d8ec4433 3054 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
8d61ffa5 3055 return;
30196673 3056 ifmgd->beacon_crc = ncrc;
d8ec4433 3057 ifmgd->beacon_crc_valid = true;
30196673 3058
d45c4172 3059 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
7d25745d
JB		 3060
3061 if (ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3062 elems.wmm_param_len))
3063 changed |= BSS_CHANGED_QOS;
3064
c65dd147
EG		 3065 /*
3066 * If we haven't had a beacon before, tell the driver about the
ef429dad 3067 * DTIM period (and beacon timing if desired) now.
c65dd147 3068 */
989c6505 3069 if (!ifmgd->have_beacon) {
c65dd147
EG		 3070 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3071 if (elems.tim)
3072 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3073 else
3074 bss_conf->dtim_period = 1;
ef429dad
JB		 3075
3076 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3077 sdata->vif.bss_conf.sync_tsf =
3078 le64_to_cpu(mgmt->u.beacon.timestamp);
3079 sdata->vif.bss_conf.sync_device_ts =
3080 rx_status->device_timestamp;
3081 if (elems.tim)
3082 sdata->vif.bss_conf.sync_dtim_count =
3083 elems.tim->dtim_count;
3084 else
3085 sdata->vif.bss_conf.sync_dtim_count = 0;
3086 }
3087
989c6505
AB		 3088 changed |= BSS_CHANGED_BEACON_INFO;
3089 ifmgd->have_beacon = true;
482a9c74
AB		 3090
3091 mutex_lock(&local->iflist_mtx);
3092 ieee80211_recalc_ps(local, -1);
3093 mutex_unlock(&local->iflist_mtx);
3094
ce857888 3095 ieee80211_recalc_ps_vif(sdata);
c65dd147
EG		 3096 }
3097
1946bed9 3098 if (elems.erp_info) {
7a5158ef
JB		 3099 erp_valid = true;
3100 erp_value = elems.erp_info[0];
3101 } else {
3102 erp_valid = false;
50c4afb9 3103 }
7a5158ef
JB		 3104 changed |= ieee80211_handle_bss_capability(sdata,
3105 le16_to_cpu(mgmt->u.beacon.capab_info),
3106 erp_valid, erp_value);
f0706e82 3107
1128958d 3108 mutex_lock(&local->sta_mtx);
bee7f586
JB		 3109 sta = sta_info_get(sdata, bssid);
3110
30eb1dc2
JB		 3111 if (ieee80211_config_bw(sdata, sta, elems.ht_operation,
3112 elems.vht_operation, bssid, &changed)) {
3113 mutex_unlock(&local->sta_mtx);
3114 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3115 WLAN_REASON_DEAUTH_LEAVING,
3116 true, deauth_buf);
6ff57cf8
JB		 3117 cfg80211_tx_mlme_mgmt(sdata->dev, deauth_buf,
3118 sizeof(deauth_buf));
8d61ffa5 3119 return;
30eb1dc2 3120 }
bee7f586
JB		 3121
3122 if (sta && elems.opmode_notif)
3123 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3124 rx_status->band, true);
1128958d 3125 mutex_unlock(&local->sta_mtx);
d3c990fb 3126
04b7b2ff
JB		 3127 if (elems.country_elem && elems.pwr_constr_elem &&
3128 mgmt->u.probe_resp.capab_info &
3129 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT))
1ea6f9c0
JB		 3130 changed |= ieee80211_handle_pwr_constr(sdata, chan,
3131 elems.country_elem,
3132 elems.country_elem_len,
3133 elems.pwr_constr_elem);
3f2355cb 3134
471b3efd 3135 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 3136}
3137
1fa57d01
JB		 3138void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3139 struct sk_buff *skb)
f0706e82
JB		 3140{
3141 struct ieee80211_rx_status *rx_status;
f0706e82
JB		 3142 struct ieee80211_mgmt *mgmt;
3143 u16 fc;
1b3a2e49
JB		 3144 struct ieee802_11_elems elems;
3145 int ies_len;
f0706e82 3146
f0706e82
JB		 3147 rx_status = (struct ieee80211_rx_status *) skb->cb;
3148 mgmt = (struct ieee80211_mgmt *) skb->data;
3149 fc = le16_to_cpu(mgmt->frame_control);
3150
8d61ffa5 3151 sdata_lock(sdata);
77fdaa12 3152
66e67e41
JB		 3153 switch (fc & IEEE80211_FCTL_STYPE) {
3154 case IEEE80211_STYPE_BEACON:
8d61ffa5 3155 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
66e67e41
JB		 3156 break;
3157 case IEEE80211_STYPE_PROBE_RESP:
3158 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3159 break;
3160 case IEEE80211_STYPE_AUTH:
8d61ffa5 3161 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
66e67e41
JB		 3162 break;
3163 case IEEE80211_STYPE_DEAUTH:
8d61ffa5 3164 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
66e67e41
JB		 3165 break;
3166 case IEEE80211_STYPE_DISASSOC:
8d61ffa5 3167 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
66e67e41
JB		 3168 break;
3169 case IEEE80211_STYPE_ASSOC_RESP:
3170 case IEEE80211_STYPE_REASSOC_RESP:
8d61ffa5 3171 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
66e67e41
JB		 3172 break;
3173 case IEEE80211_STYPE_ACTION:
37799e52 3174 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
1b3a2e49
JB		 3175 ies_len = skb->len -
3176 offsetof(struct ieee80211_mgmt,
3177 u.action.u.chan_switch.variable);
37799e52
JB		 3178
3179 if (ies_len < 0)
3180 break;
3181
3182 ieee802_11_parse_elems(
3183 mgmt->u.action.u.chan_switch.variable,
b2e506bf 3184 ies_len, true, &elems);
37799e52
JB		 3185
3186 if (elems.parse_error)
3187 break;
3188
1b3a2e49
JB		 3189 ieee80211_sta_process_chanswitch(sdata,
3190 rx_status->mactime,
04a161f4 3191 &elems, false);
1b3a2e49
JB		 3192 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3193 ies_len = skb->len -
3194 offsetof(struct ieee80211_mgmt,
3195 u.action.u.ext_chan_switch.variable);
3196
3197 if (ies_len < 0)
3198 break;
3199
3200 ieee802_11_parse_elems(
3201 mgmt->u.action.u.ext_chan_switch.variable,
b2e506bf 3202 ies_len, true, &elems);
1b3a2e49
JB		 3203
3204 if (elems.parse_error)
3205 break;
3206
3207 /* for the handling code pretend this was also an IE */
3208 elems.ext_chansw_ie =
3209 &mgmt->u.action.u.ext_chan_switch.data;
3210
66e67e41 3211 ieee80211_sta_process_chanswitch(sdata,
37799e52 3212 rx_status->mactime,
04a161f4 3213 &elems, false);
77fdaa12 3214 }
37799e52 3215 break;
77fdaa12 3216 }
8d61ffa5 3217 sdata_unlock(sdata);
f0706e82
JB		 3218}
3219
9c6bd790 3220static void ieee80211_sta_timer(unsigned long data)
f0706e82 3221{
60f8b39c
JB		 3222 struct ieee80211_sub_if_data *sdata =
3223 (struct ieee80211_sub_if_data *) data;
5bb644a0 3224
9b7d72c1 3225 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
f0706e82
JB		 3226}
3227
04ac3c0e 3228static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
6b684db1 3229 u8 *bssid, u8 reason, bool tx)
04ac3c0e 3230{
6ae16775 3231 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
04ac3c0e 3232
37ad3888 3233 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
6b684db1 3234 tx, frame_buf);
37ad3888 3235
6ff57cf8
JB		 3236 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3237 IEEE80211_DEAUTH_FRAME_LEN);
04ac3c0e
FF		 3238}
3239
66e67e41
JB		 3240static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
3241{
3242 struct ieee80211_local *local = sdata->local;
3243 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3244 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
1672c0e3 3245 u32 tx_flags = 0;
66e67e41 3246
8d61ffa5 3247 sdata_assert_lock(sdata);
66e67e41
JB		 3248
3249 if (WARN_ON_ONCE(!auth_data))
3250 return -EINVAL;
3251
66e67e41
JB		 3252 auth_data->tries++;
3253
3254 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
bdcbd8e0
JB		 3255 sdata_info(sdata, "authentication with %pM timed out\n",
3256 auth_data->bss->bssid);
66e67e41
JB		 3257
3258 /*
3259 * Most likely AP is not in the range so remove the
3260 * bss struct for that AP.
3261 */
3262 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3263
3264 return -ETIMEDOUT;
3265 }
3266
a1845fc7
JB		 3267 drv_mgd_prepare_tx(local, sdata);
3268
66e67e41 3269 if (auth_data->bss->proberesp_ies) {
6b8ece3a
JM		 3270 u16 trans = 1;
3271 u16 status = 0;
3272
bdcbd8e0
JB		 3273 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3274 auth_data->bss->bssid, auth_data->tries,
3275 IEEE80211_AUTH_MAX_TRIES);
66e67e41
JB		 3276
3277 auth_data->expected_transaction = 2;
6b8ece3a
JM		 3278
3279 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3280 trans = auth_data->sae_trans;
3281 status = auth_data->sae_status;
3282 auth_data->expected_transaction = trans;
3283 }
3284
6211dd12
SG		 3285 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3286 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3287 IEEE80211_TX_INTFL_MLME_CONN_TX;
3288
6b8ece3a
JM		 3289 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3290 auth_data->data, auth_data->data_len,
66e67e41 3291 auth_data->bss->bssid,
1672c0e3
JB		 3292 auth_data->bss->bssid, NULL, 0, 0,
3293 tx_flags);
66e67e41
JB		 3294 } else {
3295 const u8 *ssidie;
3296
bdcbd8e0
JB		 3297 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
3298 auth_data->bss->bssid, auth_data->tries,
3299 IEEE80211_AUTH_MAX_TRIES);
66e67e41 3300
9caf0364 3301 rcu_read_lock();
66e67e41 3302 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
9caf0364
JB		 3303 if (!ssidie) {
3304 rcu_read_unlock();
66e67e41 3305 return -EINVAL;
9caf0364 3306 }
66e67e41
JB		 3307 /*
3308 * Direct probe is sent to broadcast address as some APs
3309 * will not answer to direct packet in unassociated state.
3310 */
3311 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
6211dd12 3312 NULL, 0, (u32) -1, true, 0,
55de908a 3313 auth_data->bss->channel, false);
9caf0364 3314 rcu_read_unlock();
66e67e41
JB		 3315 }
3316
6211dd12 3317 if (tx_flags == 0) {
1672c0e3 3318 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
89afe614 3319 ifmgd->auth_data->timeout_started = true;
8d61ffa5 3320 run_again(sdata, auth_data->timeout);
89afe614
JB		 3321 } else {
3322 auth_data->timeout_started = false;
1672c0e3 3323 }
66e67e41
JB		 3324
3325 return 0;
3326}
3327
3328static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3329{
3330 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3331 struct ieee80211_local *local = sdata->local;
3332
8d61ffa5 3333 sdata_assert_lock(sdata);
66e67e41 3334
66e67e41
JB		 3335 assoc_data->tries++;
3336 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
bdcbd8e0
JB		 3337 sdata_info(sdata, "association with %pM timed out\n",
3338 assoc_data->bss->bssid);
66e67e41
JB		 3339
3340 /*
3341 * Most likely AP is not in the range so remove the
3342 * bss struct for that AP.
3343 */
3344 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3345
3346 return -ETIMEDOUT;
3347 }
3348
bdcbd8e0
JB		 3349 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3350 assoc_data->bss->bssid, assoc_data->tries,
3351 IEEE80211_ASSOC_MAX_TRIES);
66e67e41
JB		 3352 ieee80211_send_assoc(sdata);
3353
1672c0e3
JB		 3354 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
3355 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
89afe614 3356 assoc_data->timeout_started = true;
8d61ffa5 3357 run_again(sdata, assoc_data->timeout);
89afe614
JB		 3358 } else {
3359 assoc_data->timeout_started = false;
1672c0e3 3360 }
66e67e41
JB		 3361
3362 return 0;
3363}
3364
1672c0e3
JB		 3365void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3366 __le16 fc, bool acked)
3367{
3368 struct ieee80211_local *local = sdata->local;
3369
3370 sdata->u.mgd.status_fc = fc;
3371 sdata->u.mgd.status_acked = acked;
3372 sdata->u.mgd.status_received = true;
3373
3374 ieee80211_queue_work(&local->hw, &sdata->work);
3375}
3376
1fa57d01 3377void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 3378{
9c6bd790 3379 struct ieee80211_local *local = sdata->local;
1fa57d01 3380 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 3381
8d61ffa5 3382 sdata_lock(sdata);
77fdaa12 3383
1672c0e3
JB		 3384 if (ifmgd->status_received) {
3385 __le16 fc = ifmgd->status_fc;
3386 bool status_acked = ifmgd->status_acked;
3387
3388 ifmgd->status_received = false;
3389 if (ifmgd->auth_data &&
3390 (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) {
3391 if (status_acked) {
3392 ifmgd->auth_data->timeout =
3393 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
8d61ffa5 3394 run_again(sdata, ifmgd->auth_data->timeout);
1672c0e3
JB		 3395 } else {
3396 ifmgd->auth_data->timeout = jiffies - 1;
3397 }
89afe614 3398 ifmgd->auth_data->timeout_started = true;
1672c0e3
JB		 3399 } else if (ifmgd->assoc_data &&
3400 (ieee80211_is_assoc_req(fc) ||
3401 ieee80211_is_reassoc_req(fc))) {
3402 if (status_acked) {
3403 ifmgd->assoc_data->timeout =
3404 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
8d61ffa5 3405 run_again(sdata, ifmgd->assoc_data->timeout);
1672c0e3
JB		 3406 } else {
3407 ifmgd->assoc_data->timeout = jiffies - 1;
3408 }
89afe614 3409 ifmgd->assoc_data->timeout_started = true;
1672c0e3
JB		 3410 }
3411 }
3412
89afe614 3413 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
66e67e41
JB		 3414 time_after(jiffies, ifmgd->auth_data->timeout)) {
3415 if (ifmgd->auth_data->done) {
3416 /*
3417 * ok ... we waited for assoc but userspace didn't,
3418 * so let's just kill the auth data
3419 */
3420 ieee80211_destroy_auth_data(sdata, false);
3421 } else if (ieee80211_probe_auth(sdata)) {
3422 u8 bssid[ETH_ALEN];
3423
3424 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3425
3426 ieee80211_destroy_auth_data(sdata, false);
3427
6ff57cf8 3428 cfg80211_auth_timeout(sdata->dev, bssid);
66e67e41 3429 }
89afe614 3430 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
8d61ffa5 3431 run_again(sdata, ifmgd->auth_data->timeout);
66e67e41 3432
89afe614 3433 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
66e67e41 3434 time_after(jiffies, ifmgd->assoc_data->timeout)) {
989c6505 3435 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
66e67e41
JB		 3436 ieee80211_do_assoc(sdata)) {
3437 u8 bssid[ETH_ALEN];
3438
3439 memcpy(bssid, ifmgd->assoc_data->bss->bssid, ETH_ALEN);
3440
3441 ieee80211_destroy_assoc_data(sdata, false);
3442
6ff57cf8 3443 cfg80211_assoc_timeout(sdata->dev, bssid);
66e67e41 3444 }
89afe614 3445 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
8d61ffa5 3446 run_again(sdata, ifmgd->assoc_data->timeout);
66e67e41 3447
b291ba11
JB		 3448 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
3449 IEEE80211_STA_CONNECTION_POLL) &&
3450 ifmgd->associated) {
a43abf29 3451 u8 bssid[ETH_ALEN];
72a8a3ed 3452 int max_tries;
a43abf29 3453
0c1ad2ca 3454 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 3455
72a8a3ed 3456 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
180205bd 3457 max_tries = max_nullfunc_tries;
72a8a3ed 3458 else
180205bd 3459 max_tries = max_probe_tries;
72a8a3ed 3460
4e5ff376
FF		 3461 /* ACK received for nullfunc probing frame */
3462 if (!ifmgd->probe_send_count)
3463 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 3464 else if (ifmgd->nullfunc_failed) {
3465 if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3466 mlme_dbg(sdata,
3467 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3468 bssid, ifmgd->probe_send_count,
3469 max_tries);
04ac3c0e
FF		 3470 ieee80211_mgd_probe_ap_send(sdata);
3471 } else {
bdcbd8e0
JB		 3472 mlme_dbg(sdata,
3473 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3474 bssid);
95acac61 3475 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1
JB		 3476 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3477 false);
04ac3c0e
FF		 3478 }
3479 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
8d61ffa5 3480 run_again(sdata, ifmgd->probe_timeout);
04ac3c0e 3481 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
bdcbd8e0
JB		 3482 mlme_dbg(sdata,
3483 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3484 bssid, probe_wait_ms);
95acac61 3485 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 3486 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
04ac3c0e 3487 } else if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3488 mlme_dbg(sdata,
3489 "No probe response from AP %pM after %dms, try %d/%i\n",
3490 bssid, probe_wait_ms,
3491 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 3492 ieee80211_mgd_probe_ap_send(sdata);
3493 } else {
b291ba11
JB		 3494 /*
3495 * We actually lost the connection ... or did we?
3496 * Let's make sure!
3497 */
b38afa87
BG		 3498 wiphy_debug(local->hw.wiphy,
3499 "%s: No probe response from AP %pM"
3500 " after %dms, disconnecting.\n",
3501 sdata->name,
180205bd 3502 bssid, probe_wait_ms);
04ac3c0e 3503
95acac61 3504 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 3505 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
b291ba11
JB		 3506 }
3507 }
3508
8d61ffa5 3509 sdata_unlock(sdata);
f0706e82
JB		 3510}
3511
b291ba11
JB		 3512static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3513{
3514 struct ieee80211_sub_if_data *sdata =
3515 (struct ieee80211_sub_if_data *) data;
3516 struct ieee80211_local *local = sdata->local;
3517
3518 if (local->quiescing)
3519 return;
3520
682bd38b 3521 sdata->u.mgd.connection_loss = false;
1e4dcd01
JO		 3522 ieee80211_queue_work(&sdata->local->hw,
3523 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 3524}
3525
3526static void ieee80211_sta_conn_mon_timer(unsigned long data)
3527{
3528 struct ieee80211_sub_if_data *sdata =
3529 (struct ieee80211_sub_if_data *) data;
3530 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3531 struct ieee80211_local *local = sdata->local;
3532
3533 if (local->quiescing)
3534 return;
3535
42935eca 3536 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 3537}
3538
3539static void ieee80211_sta_monitor_work(struct work_struct *work)
3540{
3541 struct ieee80211_sub_if_data *sdata =
3542 container_of(work, struct ieee80211_sub_if_data,
3543 u.mgd.monitor_work);
3544
3545 ieee80211_mgd_probe_ap(sdata, false);
3546}
3547
9c6bd790
JB		 3548static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3549{
494f1fe5
EP		 3550 u32 flags;
3551
ad935687 3552 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
925e64c3 3553 __ieee80211_stop_poll(sdata);
ad935687 3554
b291ba11 3555 /* let's probe the connection once */
494f1fe5
EP		 3556 flags = sdata->local->hw.flags;
3557 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3558 ieee80211_queue_work(&sdata->local->hw,
3559 &sdata->u.mgd.monitor_work);
b291ba11 3560 /* and do all the other regular work too */
64592c8f 3561 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 3562 }
9c6bd790 3563}
f0706e82 3564
b8360ab8
JB		 3565#ifdef CONFIG_PM
3566void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
3567{
3568 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3569
8d61ffa5 3570 sdata_lock(sdata);
b8360ab8 3571 if (!ifmgd->associated) {
8d61ffa5 3572 sdata_unlock(sdata);
b8360ab8
JB		 3573 return;
3574 }
3575
3576 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
3577 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
3578 mlme_dbg(sdata, "driver requested disconnect after resume\n");
3579 ieee80211_sta_connection_lost(sdata,
3580 ifmgd->associated->bssid,
3581 WLAN_REASON_UNSPECIFIED,
3582 true);
8d61ffa5 3583 sdata_unlock(sdata);
b8360ab8
JB		 3584 return;
3585 }
8d61ffa5 3586 sdata_unlock(sdata);
b8360ab8
JB		 3587}
3588#endif
3589
9c6bd790
JB		 3590/* interface setup */
3591void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 3592{
46900298 3593 struct ieee80211_if_managed *ifmgd;
988c0f72 3594
46900298 3595 ifmgd = &sdata->u.mgd;
b291ba11 3596 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 3597 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 3598 INIT_WORK(&ifmgd->beacon_connection_loss_work,
3599 ieee80211_beacon_connection_loss_work);
882a7c69
JB		 3600 INIT_WORK(&ifmgd->csa_connection_drop_work,
3601 ieee80211_csa_connection_drop_work);
d1f5b7a3 3602 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
46900298 3603 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 3604 (unsigned long) sdata);
b291ba11
JB		 3605 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
3606 (unsigned long) sdata);
3607 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
3608 (unsigned long) sdata);
46900298 3609 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 3610 (unsigned long) sdata);
9c6bd790 3611
ab1faead 3612 ifmgd->flags = 0;
1478acb3 3613 ifmgd->powersave = sdata->wdev.ps;
219c3867
AB		 3614 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
3615 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
67baf663 3616 ifmgd->p2p_noa_index = -1;
bbbdff9e 3617
0f78231b
JB		 3618 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
3619 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
3620 else
3621 ifmgd->req_smps = IEEE80211_SMPS_OFF;
f0706e82
JB		 3622}
3623
77fdaa12
JB		 3624/* scan finished notification */
3625void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 3626{
31ee67a1 3627 struct ieee80211_sub_if_data *sdata;
60f8b39c 3628
77fdaa12
JB		 3629 /* Restart STA timers */
3630 rcu_read_lock();
370bd005
BG		 3631 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3632 if (ieee80211_sdata_running(sdata))
3633 ieee80211_restart_sta_timer(sdata);
3634 }
77fdaa12
JB		 3635 rcu_read_unlock();
3636}
60f8b39c 3637
77fdaa12
JB		 3638int ieee80211_max_network_latency(struct notifier_block *nb,
3639 unsigned long data, void *dummy)
3640{
3641 s32 latency_usec = (s32) data;
3642 struct ieee80211_local *local =
3643 container_of(nb, struct ieee80211_local,
3644 network_latency_notifier);
1fa6f4af 3645
77fdaa12
JB		 3646 mutex_lock(&local->iflist_mtx);
3647 ieee80211_recalc_ps(local, latency_usec);
3648 mutex_unlock(&local->iflist_mtx);
dfe67012 3649
77fdaa12 3650 return 0;
9c6bd790
JB		 3651}
3652
f2d9d270
JB		 3653static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
3654 struct cfg80211_bss *cbss)
3655{
3656 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3657 const u8 *ht_cap_ie, *vht_cap_ie;
3658 const struct ieee80211_ht_cap *ht_cap;
3659 const struct ieee80211_vht_cap *vht_cap;
3660 u8 chains = 1;
3661
3662 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
3663 return chains;
3664
9caf0364 3665 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
f2d9d270
JB		 3666 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
3667 ht_cap = (void *)(ht_cap_ie + 2);
3668 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
3669 /*
3670 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
3671 * "Tx Unequal Modulation Supported" fields.
3672 */
3673 }
3674
3675 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
3676 return chains;
3677
9caf0364 3678 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
f2d9d270
JB		 3679 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
3680 u8 nss;
3681 u16 tx_mcs_map;
3682
3683 vht_cap = (void *)(vht_cap_ie + 2);
3684 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
3685 for (nss = 8; nss > 0; nss--) {
3686 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
3687 IEEE80211_VHT_MCS_NOT_SUPPORTED)
3688 break;
3689 }
3690 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
3691 chains = max(chains, nss);
3692 }
3693
3694 return chains;
3695}
3696
b17166a7
JB		 3697static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
3698 struct cfg80211_bss *cbss)
a1cf775d
JB		 3699{
3700 struct ieee80211_local *local = sdata->local;
3701 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
24398e39 3702 const struct ieee80211_ht_operation *ht_oper = NULL;
f2d9d270 3703 const struct ieee80211_vht_operation *vht_oper = NULL;
24398e39 3704 struct ieee80211_supported_band *sband;
4bf88530 3705 struct cfg80211_chan_def chandef;
f2d9d270 3706 int ret;
a1cf775d 3707
24398e39
JB		 3708 sband = local->hw.wiphy->bands[cbss->channel->band];
3709
f2d9d270
JB		 3710 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
3711 IEEE80211_STA_DISABLE_80P80MHZ |
3712 IEEE80211_STA_DISABLE_160MHZ);
3713
9caf0364
JB		 3714 rcu_read_lock();
3715
f2d9d270
JB		 3716 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3717 sband->ht_cap.ht_supported) {
08e6effa 3718 const u8 *ht_oper_ie, *ht_cap;
24398e39 3719
9caf0364 3720 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
24398e39
JB		 3721 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3722 ht_oper = (void *)(ht_oper_ie + 2);
08e6effa
JB		 3723
3724 ht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
3725 if (!ht_cap || ht_cap[1] < sizeof(struct ieee80211_ht_cap)) {
3726 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3727 ht_oper = NULL;
3728 }
24398e39
JB		 3729 }
3730
f2d9d270
JB		 3731 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3732 sband->vht_cap.vht_supported) {
08e6effa 3733 const u8 *vht_oper_ie, *vht_cap;
f2d9d270 3734
9caf0364
JB		 3735 vht_oper_ie = ieee80211_bss_get_ie(cbss,
3736 WLAN_EID_VHT_OPERATION);
f2d9d270
JB		 3737 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
3738 vht_oper = (void *)(vht_oper_ie + 2);
3739 if (vht_oper && !ht_oper) {
3740 vht_oper = NULL;
bdcbd8e0 3741 sdata_info(sdata,
f2d9d270 3742 "AP advertised VHT without HT, disabling both\n");
cb145022
JB		 3743 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3744 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
24398e39 3745 }
08e6effa
JB		 3746
3747 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
3748 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
3749 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3750 vht_oper = NULL;
3751 }
24398e39
JB		 3752 }
3753
f2d9d270
JB		 3754 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
3755 cbss->channel,
3756 ht_oper, vht_oper,
30eb1dc2 3757 &chandef, true);
04ecd257 3758
f2d9d270
JB		 3759 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
3760 local->rx_chains);
24398e39 3761
9caf0364
JB		 3762 rcu_read_unlock();
3763
04ecd257
JB		 3764 /* will change later if needed */
3765 sdata->smps_mode = IEEE80211_SMPS_OFF;
3766
f2d9d270
JB		 3767 /*
3768 * If this fails (possibly due to channel context sharing
3769 * on incompatible channels, e.g. 80+80 and 160 sharing the
3770 * same control channel) try to use a smaller bandwidth.
3771 */
3772 ret = ieee80211_vif_use_channel(sdata, &chandef,
3773 IEEE80211_CHANCTX_SHARED);
d601cd8d 3774 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
f2d9d270 3775 ifmgd->flags |= chandef_downgrade(&chandef);
d601cd8d
JB		 3776 ret = ieee80211_vif_use_channel(sdata, &chandef,
3777 IEEE80211_CHANCTX_SHARED);
3778 }
f2d9d270 3779 return ret;
b17166a7
JB		 3780}
3781
3782static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
3783 struct cfg80211_bss *cbss, bool assoc)
3784{
3785 struct ieee80211_local *local = sdata->local;
3786 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3787 struct ieee80211_bss *bss = (void *)cbss->priv;
3788 struct sta_info *new_sta = NULL;
3789 bool have_sta = false;
3790 int err;
3791
3792 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3793 return -EINVAL;
3794
3795 if (assoc) {
3796 rcu_read_lock();
3797 have_sta = sta_info_get(sdata, cbss->bssid);
3798 rcu_read_unlock();
3799 }
3800
3801 if (!have_sta) {
3802 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
3803 if (!new_sta)
3804 return -ENOMEM;
3805 }
3806
13e0c8e3 3807 if (new_sta) {
5d6a1b06
JB		 3808 u32 rates = 0, basic_rates = 0;
3809 bool have_higher_than_11mbit;
3810 int min_rate = INT_MAX, min_rate_index = -1;
b17166a7 3811 struct ieee80211_supported_band *sband;
8cef2c9d 3812 const struct cfg80211_bss_ies *ies;
b17166a7
JB		 3813
3814 sband = local->hw.wiphy->bands[cbss->channel->band];
3815
3816 err = ieee80211_prep_channel(sdata, cbss);
3817 if (err) {
3818 sta_info_free(local, new_sta);
3819 return err;
3820 }
5d6a1b06 3821
5d6a1b06
JB		 3822 ieee80211_get_rates(sband, bss->supp_rates,
3823 bss->supp_rates_len,
3824 &rates, &basic_rates,
3825 &have_higher_than_11mbit,
3826 &min_rate, &min_rate_index);
3827
3828 /*
3829 * This used to be a workaround for basic rates missing
3830 * in the association response frame. Now that we no
3831 * longer use the basic rates from there, it probably
3832 * doesn't happen any more, but keep the workaround so
3833 * in case some *other* APs are buggy in different ways
3834 * we can connect -- with a warning.
3835 */
3836 if (!basic_rates && min_rate_index >= 0) {
bdcbd8e0
JB		 3837 sdata_info(sdata,
3838 "No basic rates, using min rate instead\n");
5d6a1b06
JB		 3839 basic_rates = BIT(min_rate_index);
3840 }
3841
13e0c8e3 3842 new_sta->sta.supp_rates[cbss->channel->band] = rates;
5d6a1b06
JB		 3843 sdata->vif.bss_conf.basic_rates = basic_rates;
3844
3845 /* cf. IEEE 802.11 9.2.12 */
55de908a 3846 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
5d6a1b06
JB		 3847 have_higher_than_11mbit)
3848 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3849 else
3850 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
3851
3852 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
3853
8c358bcd
JB		 3854 /* set timing information */
3855 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
8cef2c9d 3856 rcu_read_lock();
ef429dad
JB		 3857 ies = rcu_dereference(cbss->beacon_ies);
3858 if (ies) {
3859 const u8 *tim_ie;
3860
3861 sdata->vif.bss_conf.sync_tsf = ies->tsf;
3862 sdata->vif.bss_conf.sync_device_ts =
3863 bss->device_ts_beacon;
3864 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
3865 ies->data, ies->len);
3866 if (tim_ie && tim_ie[1] >= 2)
3867 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
3868 else
3869 sdata->vif.bss_conf.sync_dtim_count = 0;
3870 } else if (!(local->hw.flags &
3871 IEEE80211_HW_TIMING_BEACON_ONLY)) {
3872 ies = rcu_dereference(cbss->proberesp_ies);
3873 /* must be non-NULL since beacon IEs were NULL */
3874 sdata->vif.bss_conf.sync_tsf = ies->tsf;
3875 sdata->vif.bss_conf.sync_device_ts =
3876 bss->device_ts_presp;
3877 sdata->vif.bss_conf.sync_dtim_count = 0;
3878 } else {
3879 sdata->vif.bss_conf.sync_tsf = 0;
3880 sdata->vif.bss_conf.sync_device_ts = 0;
3881 sdata->vif.bss_conf.sync_dtim_count = 0;
3882 }
8cef2c9d 3883 rcu_read_unlock();
8c358bcd
JB		 3884
3885 /* tell driver about BSSID, basic rates and timing */
5d6a1b06 3886 ieee80211_bss_info_change_notify(sdata,
8c358bcd
JB		 3887 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
3888 BSS_CHANGED_BEACON_INT);
a1cf775d
JB		 3889
3890 if (assoc)
13e0c8e3 3891 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
a1cf775d 3892
13e0c8e3
JB		 3893 err = sta_info_insert(new_sta);
3894 new_sta = NULL;
a1cf775d 3895 if (err) {
bdcbd8e0
JB		 3896 sdata_info(sdata,
3897 "failed to insert STA entry for the AP (error %d)\n",
3898 err);
a1cf775d
JB		 3899 return err;
3900 }
3901 } else
b203ca39 3902 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
a1cf775d
JB		 3903
3904 return 0;
3905}
3906
77fdaa12
JB		 3907/* config hooks */
3908int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
3909 struct cfg80211_auth_request *req)
9c6bd790 3910{
66e67e41
JB		 3911 struct ieee80211_local *local = sdata->local;
3912 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3913 struct ieee80211_mgd_auth_data *auth_data;
77fdaa12 3914 u16 auth_alg;
66e67e41
JB		 3915 int err;
3916
3917 /* prepare auth data structure */
9c6bd790 3918
77fdaa12
JB		 3919 switch (req->auth_type) {
3920 case NL80211_AUTHTYPE_OPEN_SYSTEM:
3921 auth_alg = WLAN_AUTH_OPEN;
3922 break;
3923 case NL80211_AUTHTYPE_SHARED_KEY:
66e67e41 3924 if (IS_ERR(local->wep_tx_tfm))
9dca9c49 3925 return -EOPNOTSUPP;
77fdaa12
JB		 3926 auth_alg = WLAN_AUTH_SHARED_KEY;
3927 break;
3928 case NL80211_AUTHTYPE_FT:
3929 auth_alg = WLAN_AUTH_FT;
3930 break;
3931 case NL80211_AUTHTYPE_NETWORK_EAP:
3932 auth_alg = WLAN_AUTH_LEAP;
3933 break;
6b8ece3a
JM		 3934 case NL80211_AUTHTYPE_SAE:
3935 auth_alg = WLAN_AUTH_SAE;
3936 break;
77fdaa12
JB		 3937 default:
3938 return -EOPNOTSUPP;
60f8b39c 3939 }
77fdaa12 3940
6b8ece3a
JM		 3941 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
3942 req->ie_len, GFP_KERNEL);
66e67e41 3943 if (!auth_data)
9c6bd790 3944 return -ENOMEM;
77fdaa12 3945
66e67e41 3946 auth_data->bss = req->bss;
77fdaa12 3947
6b8ece3a
JM		 3948 if (req->sae_data_len >= 4) {
3949 __le16 *pos = (__le16 *) req->sae_data;
3950 auth_data->sae_trans = le16_to_cpu(pos[0]);
3951 auth_data->sae_status = le16_to_cpu(pos[1]);
3952 memcpy(auth_data->data, req->sae_data + 4,
3953 req->sae_data_len - 4);
3954 auth_data->data_len += req->sae_data_len - 4;
3955 }
3956
77fdaa12 3957 if (req->ie && req->ie_len) {
6b8ece3a
JM		 3958 memcpy(&auth_data->data[auth_data->data_len],
3959 req->ie, req->ie_len);
3960 auth_data->data_len += req->ie_len;
9c6bd790 3961 }
77fdaa12 3962
fffd0934 3963 if (req->key && req->key_len) {
66e67e41
JB		 3964 auth_data->key_len = req->key_len;
3965 auth_data->key_idx = req->key_idx;
3966 memcpy(auth_data->key, req->key, req->key_len);
fffd0934
JB		 3967 }
3968
66e67e41 3969 auth_data->algorithm = auth_alg;
60f8b39c 3970
66e67e41 3971 /* try to authenticate/probe */
2a33bee2 3972
66e67e41
JB		 3973 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
3974 ifmgd->assoc_data) {
3975 err = -EBUSY;
3976 goto err_free;
2a33bee2
GE		 3977 }
3978
66e67e41
JB		 3979 if (ifmgd->auth_data)
3980 ieee80211_destroy_auth_data(sdata, false);
2a33bee2 3981
66e67e41
JB		 3982 /* prep auth_data so we don't go into idle on disassoc */
3983 ifmgd->auth_data = auth_data;
af6b6374 3984
7b119dc0
JB		 3985 if (ifmgd->associated) {
3986 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3987
3988 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3989 WLAN_REASON_UNSPECIFIED,
3990 false, frame_buf);
3991
6ff57cf8
JB		 3992 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3993 sizeof(frame_buf));
7b119dc0 3994 }
af6b6374 3995
bdcbd8e0 3996 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
e5b900d2 3997
a1cf775d
JB		 3998 err = ieee80211_prep_connection(sdata, req->bss, false);
3999 if (err)
66e67e41 4000 goto err_clear;
af6b6374 4001
66e67e41
JB		 4002 err = ieee80211_probe_auth(sdata);
4003 if (err) {
66e67e41
JB		 4004 sta_info_destroy_addr(sdata, req->bss->bssid);
4005 goto err_clear;
4006 }
4007
4008 /* hold our own reference */
5b112d3d 4009 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
8d61ffa5 4010 return 0;
66e67e41
JB		 4011
4012 err_clear:
3d2abdfd
EP		 4013 memset(ifmgd->bssid, 0, ETH_ALEN);
4014 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 4015 ifmgd->auth_data = NULL;
4016 err_free:
4017 kfree(auth_data);
66e67e41 4018 return err;
af6b6374
JB		 4019}
4020
77fdaa12
JB		 4021int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4022 struct cfg80211_assoc_request *req)
f0706e82 4023{
66e67e41 4024 struct ieee80211_local *local = sdata->local;
77fdaa12 4025 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 4026 struct ieee80211_bss *bss = (void *)req->bss->priv;
66e67e41 4027 struct ieee80211_mgd_assoc_data *assoc_data;
c65dd147 4028 const struct cfg80211_bss_ies *beacon_ies;
4e74bfdb 4029 struct ieee80211_supported_band *sband;
b08fbbd8 4030 const u8 *ssidie, *ht_ie, *vht_ie;
2a33bee2 4031 int i, err;
f0706e82 4032
66e67e41
JB		 4033 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4034 if (!assoc_data)
4035 return -ENOMEM;
4036
9caf0364
JB		 4037 rcu_read_lock();
4038 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4039 if (!ssidie) {
4040 rcu_read_unlock();
4041 kfree(assoc_data);
4042 return -EINVAL;
4043 }
4044 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4045 assoc_data->ssid_len = ssidie[1];
4046 rcu_read_unlock();
4047
7b119dc0
JB		 4048 if (ifmgd->associated) {
4049 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4050
4051 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4052 WLAN_REASON_UNSPECIFIED,
4053 false, frame_buf);
4054
6ff57cf8
JB		 4055 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4056 sizeof(frame_buf));
7b119dc0 4057 }
66e67e41
JB		 4058
4059 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4060 err = -EBUSY;
4061 goto err_free;
af6b6374 4062 }
77fdaa12 4063
66e67e41
JB		 4064 if (ifmgd->assoc_data) {
4065 err = -EBUSY;
4066 goto err_free;
4067 }
77fdaa12 4068
66e67e41
JB		 4069 if (ifmgd->auth_data) {
4070 bool match;
4071
4072 /* keep sta info, bssid if matching */
b203ca39 4073 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
66e67e41 4074 ieee80211_destroy_auth_data(sdata, match);
2a33bee2
GE		 4075 }
4076
66e67e41 4077 /* prepare assoc data */
19c3b830 4078
d8ec4433
JO		 4079 ifmgd->beacon_crc_valid = false;
4080
de5036aa
JB		 4081 /*
4082 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4083 * We still associate in non-HT mode (11a/b/g) if any one of these
4084 * ciphers is configured as pairwise.
4085 * We can set this to true for non-11n hardware, that'll be checked
4086 * separately along with the peer capabilities.
4087 */
1c4cb928 4088 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
77fdaa12
JB		 4089 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4090 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
1c4cb928 4091 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
a8243b72 4092 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
d545daba 4093 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
1c4cb928 4094 netdev_info(sdata->dev,
d545daba 4095 "disabling HT/VHT due to WEP/TKIP use\n");
1c4cb928
JB		 4096 }
4097 }
77fdaa12 4098
d545daba 4099 if (req->flags & ASSOC_REQ_DISABLE_HT) {
a8243b72 4100 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
d545daba
MP		 4101 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4102 }
ef96a842 4103
dd5ecfea
JB		 4104 if (req->flags & ASSOC_REQ_DISABLE_VHT)
4105 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4106
4e74bfdb
JB		 4107 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4108 sband = local->hw.wiphy->bands[req->bss->channel->band];
4109 if (!sband->ht_cap.ht_supported ||
1c4cb928 4110 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
a8243b72 4111 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
1b49de26
JB		 4112 if (!bss->wmm_used)
4113 netdev_info(sdata->dev,
4114 "disabling HT as WMM/QoS is not supported by the AP\n");
1c4cb928 4115 }
4e74bfdb 4116
d545daba
MP		 4117 /* disable VHT if we don't support it or the AP doesn't use WMM */
4118 if (!sband->vht_cap.vht_supported ||
4119 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
4120 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
1b49de26
JB		 4121 if (!bss->wmm_used)
4122 netdev_info(sdata->dev,
4123 "disabling VHT as WMM/QoS is not supported by the AP\n");
d545daba
MP		 4124 }
4125
ef96a842
BG		 4126 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4127 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4128 sizeof(ifmgd->ht_capa_mask));
4129
dd5ecfea
JB		 4130 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4131 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4132 sizeof(ifmgd->vht_capa_mask));
4133
77fdaa12 4134 if (req->ie && req->ie_len) {
66e67e41
JB		 4135 memcpy(assoc_data->ie, req->ie, req->ie_len);
4136 assoc_data->ie_len = req->ie_len;
4137 }
f679f65d 4138
66e67e41 4139 assoc_data->bss = req->bss;
f679f65d 4140
af6b6374
JB		 4141 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4142 if (ifmgd->powersave)
04ecd257 4143 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
af6b6374 4144 else
04ecd257 4145 sdata->smps_mode = IEEE80211_SMPS_OFF;
af6b6374 4146 } else
04ecd257 4147 sdata->smps_mode = ifmgd->req_smps;
af6b6374 4148
66e67e41 4149 assoc_data->capability = req->bss->capability;
32c5057b
JB		 4150 assoc_data->wmm = bss->wmm_used &&
4151 (local->hw.queues >= IEEE80211_NUM_ACS);
66e67e41
JB		 4152 assoc_data->supp_rates = bss->supp_rates;
4153 assoc_data->supp_rates_len = bss->supp_rates_len;
9dde6423 4154
9caf0364 4155 rcu_read_lock();
9dde6423
JB		 4156 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4157 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4158 assoc_data->ap_ht_param =
4159 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4160 else
a8243b72 4161 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
b08fbbd8
JB		 4162 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4163 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4164 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4165 sizeof(struct ieee80211_vht_cap));
4166 else
4167 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
9caf0364 4168 rcu_read_unlock();
63f170e0 4169
ab13315a 4170 if (bss->wmm_used && bss->uapsd_supported &&
24aa11ab
AB		 4171 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD) &&
4172 sdata->wmm_acm != 0xff) {
76f0303d 4173 assoc_data->uapsd = true;
ab13315a
KV		 4174 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4175 } else {
76f0303d 4176 assoc_data->uapsd = false;
ab13315a
KV		 4177 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4178 }
4179
77fdaa12 4180 if (req->prev_bssid)
66e67e41 4181 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12
JB		 4182
4183 if (req->use_mfp) {
4184 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4185 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4186 } else {
4187 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4188 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4189 }
4190
4191 if (req->crypto.control_port)
4192 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4193 else
4194 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4195
a621fa4d
JB		 4196 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4197 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4198
66e67e41
JB		 4199 /* kick off associate process */
4200
4201 ifmgd->assoc_data = assoc_data;
826262c3 4202 ifmgd->dtim_period = 0;
989c6505 4203 ifmgd->have_beacon = false;
66e67e41 4204
a1cf775d
JB		 4205 err = ieee80211_prep_connection(sdata, req->bss, true);
4206 if (err)
4207 goto err_clear;
66e67e41 4208
c65dd147
EG		 4209 rcu_read_lock();
4210 beacon_ies = rcu_dereference(req->bss->beacon_ies);
826262c3 4211
c65dd147
EG		 4212 if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC &&
4213 !beacon_ies) {
4214 /*
4215 * Wait up to one beacon interval ...
4216 * should this be more if we miss one?
4217 */
4218 sdata_info(sdata, "waiting for beacon from %pM\n",
4219 ifmgd->bssid);
4220 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
89afe614 4221 assoc_data->timeout_started = true;
c65dd147
EG		 4222 assoc_data->need_beacon = true;
4223 } else if (beacon_ies) {
4224 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4225 beacon_ies->data,
4226 beacon_ies->len);
ef429dad
JB		 4227 u8 dtim_count = 0;
4228
c65dd147
EG		 4229 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4230 const struct ieee80211_tim_ie *tim;
4231 tim = (void *)(tim_ie + 2);
4232 ifmgd->dtim_period = tim->dtim_period;
ef429dad 4233 dtim_count = tim->dtim_count;
826262c3 4234 }
989c6505 4235 ifmgd->have_beacon = true;
66e67e41 4236 assoc_data->timeout = jiffies;
89afe614 4237 assoc_data->timeout_started = true;
ef429dad
JB		 4238
4239 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
4240 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4241 sdata->vif.bss_conf.sync_device_ts =
4242 bss->device_ts_beacon;
4243 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4244 }
c65dd147
EG		 4245 } else {
4246 assoc_data->timeout = jiffies;
89afe614 4247 assoc_data->timeout_started = true;
66e67e41 4248 }
c65dd147
EG		 4249 rcu_read_unlock();
4250
8d61ffa5 4251 run_again(sdata, assoc_data->timeout);
66e67e41 4252
fcff4f10
PS		 4253 if (bss->corrupt_data) {
4254 char *corrupt_type = "data";
4255 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4256 if (bss->corrupt_data &
4257 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4258 corrupt_type = "beacon and probe response";
4259 else
4260 corrupt_type = "beacon";
4261 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4262 corrupt_type = "probe response";
bdcbd8e0
JB		 4263 sdata_info(sdata, "associating with AP with corrupt %s\n",
4264 corrupt_type);
fcff4f10
PS		 4265 }
4266
8d61ffa5 4267 return 0;
66e67e41 4268 err_clear:
3d2abdfd
EP		 4269 memset(ifmgd->bssid, 0, ETH_ALEN);
4270 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 4271 ifmgd->assoc_data = NULL;
4272 err_free:
4273 kfree(assoc_data);
66e67e41 4274 return err;
f0706e82
JB		 4275}
4276
77fdaa12 4277int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
63c9c5e7 4278 struct cfg80211_deauth_request *req)
f0706e82 4279{
46900298 4280 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 4281 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
6863255b 4282 bool tx = !req->local_state_change;
de3d43a3 4283 bool report_frame = false;
f0706e82 4284
bdcbd8e0
JB		 4285 sdata_info(sdata,
4286 "deauthenticating from %pM by local choice (reason=%d)\n",
4287 req->bssid, req->reason_code);
0ff71613 4288
86552017 4289 if (ifmgd->auth_data) {
8c7d857c 4290 drv_mgd_prepare_tx(sdata->local, sdata);
37ad3888
JB		 4291 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4292 IEEE80211_STYPE_DEAUTH,
6863255b 4293 req->reason_code, tx,
37ad3888 4294 frame_buf);
86552017 4295 ieee80211_destroy_auth_data(sdata, false);
86552017 4296
de3d43a3 4297 report_frame = true;
86552017 4298 goto out;
8c7d857c
EG		 4299 }
4300
86552017
JB		 4301 if (ifmgd->associated &&
4302 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
4303 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4304 req->reason_code, tx, frame_buf);
de3d43a3 4305 report_frame = true;
86552017 4306 }
37ad3888 4307
86552017 4308 out:
de3d43a3 4309 if (report_frame)
6ff57cf8
JB		 4310 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4311 IEEE80211_DEAUTH_FRAME_LEN);
86552017 4312
f0706e82
JB		 4313 return 0;
4314}
84363e6e 4315
77fdaa12 4316int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 4317 struct cfg80211_disassoc_request *req)
9c6bd790 4318{
77fdaa12 4319 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 4320 u8 bssid[ETH_ALEN];
6ae16775 4321 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
9c6bd790 4322
8d8b261a
JB		 4323 /*
4324 * cfg80211 should catch this ... but it's racy since
4325 * we can receive a disassoc frame, process it, hand it
4326 * to cfg80211 while that's in a locked section already
4327 * trying to tell us that the user wants to disconnect.
4328 */
8d61ffa5 4329 if (ifmgd->associated != req->bss)
77fdaa12 4330 return -ENOLINK;
77fdaa12 4331
bdcbd8e0
JB		 4332 sdata_info(sdata,
4333 "disassociating from %pM by local choice (reason=%d)\n",
4334 req->bss->bssid, req->reason_code);
0ff71613 4335
e69e95db 4336 memcpy(bssid, req->bss->bssid, ETH_ALEN);
37ad3888
JB		 4337 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4338 req->reason_code, !req->local_state_change,
4339 frame_buf);
10f644a4 4340
6ff57cf8
JB		 4341 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4342 IEEE80211_DEAUTH_FRAME_LEN);
bc83b681 4343
10f644a4
JB		 4344 return 0;
4345}
026331c4 4346
afa762f6 4347void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
54e4ffb2
JB		 4348{
4349 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4350
49921859
BG		 4351 /*
4352 * Make sure some work items will not run after this,
4353 * they will not do anything but might not have been
4354 * cancelled when disconnecting.
4355 */
4356 cancel_work_sync(&ifmgd->monitor_work);
4357 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
4358 cancel_work_sync(&ifmgd->request_smps_work);
4359 cancel_work_sync(&ifmgd->csa_connection_drop_work);
4360 cancel_work_sync(&ifmgd->chswitch_work);
4361
8d61ffa5 4362 sdata_lock(sdata);
54e4ffb2
JB		 4363 if (ifmgd->assoc_data)
4364 ieee80211_destroy_assoc_data(sdata, false);
4365 if (ifmgd->auth_data)
4366 ieee80211_destroy_auth_data(sdata, false);
4367 del_timer_sync(&ifmgd->timer);
8d61ffa5 4368 sdata_unlock(sdata);
54e4ffb2
JB		 4369}
4370
a97c13c3
JO		 4371void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
4372 enum nl80211_cqm_rssi_threshold_event rssi_event,
4373 gfp_t gfp)
4374{
4375 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4376
b5878a2d
JB		 4377 trace_api_cqm_rssi_notify(sdata, rssi_event);
4378
a97c13c3
JO		 4379 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
4380}
4381EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
Linux kernel - Deliverables
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