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mac80211: use ieee80211_p2p_noa_attr structure
[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
77fdaa12
JB		 93/*
94 * All cfg80211 functions have to be called outside a locked
95 * section so that they can acquire a lock themselves... This
96 * is much simpler than queuing up things in cfg80211, but we
97 * do need some indirection for that here.
98 */
99enum rx_mgmt_action {
100 /* no action required */
101 RX_MGMT_NONE,
102
77fdaa12
JB		 103 /* caller must call cfg80211_send_deauth() */
104 RX_MGMT_CFG80211_DEAUTH,
105
106 /* caller must call cfg80211_send_disassoc() */
107 RX_MGMT_CFG80211_DISASSOC,
66e67e41
JB		 108
109 /* caller must call cfg80211_send_rx_auth() */
110 RX_MGMT_CFG80211_RX_AUTH,
111
112 /* caller must call cfg80211_send_rx_assoc() */
113 RX_MGMT_CFG80211_RX_ASSOC,
114
115 /* caller must call cfg80211_send_assoc_timeout() */
116 RX_MGMT_CFG80211_ASSOC_TIMEOUT,
30eb1dc2
JB		 117
118 /* used when a processed beacon causes a deauth */
119 RX_MGMT_CFG80211_TX_DEAUTH,
77fdaa12
JB		 120};
121
5484e237 122/* utils */
77fdaa12
JB		 123static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd)
124{
46a5ebaf 125 lockdep_assert_held(&ifmgd->mtx);
77fdaa12
JB		 126}
127
ca386f31
JB		 128/*
129 * We can have multiple work items (and connection probing)
130 * scheduling this timer, but we need to take care to only
131 * reschedule it when it should fire _earlier_ than it was
132 * asked for before, or if it's not pending right now. This
133 * function ensures that. Note that it then is required to
134 * run this function for all timeouts after the first one
135 * has happened -- the work that runs from this timer will
136 * do that.
137 */
66e67e41 138static void run_again(struct ieee80211_if_managed *ifmgd, unsigned long timeout)
ca386f31
JB		 139{
140 ASSERT_MGD_MTX(ifmgd);
141
142 if (!timer_pending(&ifmgd->timer) ||
143 time_before(timeout, ifmgd->timer.expires))
144 mod_timer(&ifmgd->timer, timeout);
145}
146
d3a910a8 147void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
b291ba11 148{
c1288b12 149 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
b291ba11
JB		 150 return;
151
7eeff74c
JB		 152 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
153 return;
154
b291ba11 155 mod_timer(&sdata->u.mgd.bcn_mon_timer,
7ccc8bd7 156 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
b291ba11
JB		 157}
158
be099e82
LR		 159void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
160{
0c699c3a
LR		 161 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
162
8628172f
SG		 163 if (unlikely(!sdata->u.mgd.associated))
164 return;
165
be099e82
LR		 166 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
167 return;
168
169 mod_timer(&sdata->u.mgd.conn_mon_timer,
170 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
0c699c3a
LR		 171
172 ifmgd->probe_send_count = 0;
be099e82
LR		 173}
174
5484e237 175static int ecw2cw(int ecw)
60f8b39c 176{
5484e237 177 return (1 << ecw) - 1;
60f8b39c
JB		 178}
179
6565ec9b
JB		 180static u32 chandef_downgrade(struct cfg80211_chan_def *c)
181{
182 u32 ret;
183 int tmp;
184
185 switch (c->width) {
186 case NL80211_CHAN_WIDTH_20:
187 c->width = NL80211_CHAN_WIDTH_20_NOHT;
188 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
189 break;
190 case NL80211_CHAN_WIDTH_40:
191 c->width = NL80211_CHAN_WIDTH_20;
192 c->center_freq1 = c->chan->center_freq;
193 ret = IEEE80211_STA_DISABLE_40MHZ |
194 IEEE80211_STA_DISABLE_VHT;
195 break;
196 case NL80211_CHAN_WIDTH_80:
197 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
198 /* n_P40 */
199 tmp /= 2;
200 /* freq_P40 */
201 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
202 c->width = NL80211_CHAN_WIDTH_40;
203 ret = IEEE80211_STA_DISABLE_VHT;
204 break;
205 case NL80211_CHAN_WIDTH_80P80:
206 c->center_freq2 = 0;
207 c->width = NL80211_CHAN_WIDTH_80;
208 ret = IEEE80211_STA_DISABLE_80P80MHZ |
209 IEEE80211_STA_DISABLE_160MHZ;
210 break;
211 case NL80211_CHAN_WIDTH_160:
212 /* n_P20 */
213 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
214 /* n_P80 */
215 tmp /= 4;
216 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
217 c->width = NL80211_CHAN_WIDTH_80;
218 ret = IEEE80211_STA_DISABLE_80P80MHZ |
219 IEEE80211_STA_DISABLE_160MHZ;
220 break;
221 default:
222 case NL80211_CHAN_WIDTH_20_NOHT:
223 WARN_ON_ONCE(1);
224 c->width = NL80211_CHAN_WIDTH_20_NOHT;
225 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
226 break;
227 }
228
229 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
230
231 return ret;
232}
233
234static u32
235ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
236 struct ieee80211_supported_band *sband,
237 struct ieee80211_channel *channel,
238 const struct ieee80211_ht_operation *ht_oper,
239 const struct ieee80211_vht_operation *vht_oper,
30eb1dc2 240 struct cfg80211_chan_def *chandef, bool verbose)
6565ec9b
JB		 241{
242 struct cfg80211_chan_def vht_chandef;
243 u32 ht_cfreq, ret;
244
245 chandef->chan = channel;
246 chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
247 chandef->center_freq1 = channel->center_freq;
248 chandef->center_freq2 = 0;
249
250 if (!ht_oper || !sband->ht_cap.ht_supported) {
251 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
252 goto out;
253 }
254
255 chandef->width = NL80211_CHAN_WIDTH_20;
256
257 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
258 channel->band);
259 /* check that channel matches the right operating channel */
260 if (channel->center_freq != ht_cfreq) {
261 /*
262 * It's possible that some APs are confused here;
263 * Netgear WNDR3700 sometimes reports 4 higher than
264 * the actual channel in association responses, but
265 * since we look at probe response/beacon data here
266 * it should be OK.
267 */
30eb1dc2
JB		 268 if (verbose)
269 sdata_info(sdata,
270 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
271 channel->center_freq, ht_cfreq,
272 ht_oper->primary_chan, channel->band);
6565ec9b
JB		 273 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
274 goto out;
275 }
276
277 /* check 40 MHz support, if we have it */
278 if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
279 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
280 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
281 chandef->width = NL80211_CHAN_WIDTH_40;
282 chandef->center_freq1 += 10;
283 break;
284 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
285 chandef->width = NL80211_CHAN_WIDTH_40;
286 chandef->center_freq1 -= 10;
287 break;
288 }
289 } else {
290 /* 40 MHz (and 80 MHz) must be supported for VHT */
291 ret = IEEE80211_STA_DISABLE_VHT;
292 goto out;
293 }
294
295 if (!vht_oper || !sband->vht_cap.vht_supported) {
296 ret = IEEE80211_STA_DISABLE_VHT;
297 goto out;
298 }
299
300 vht_chandef.chan = channel;
301 vht_chandef.center_freq1 =
302 ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx,
303 channel->band);
304 vht_chandef.center_freq2 = 0;
305
306 if (vht_oper->center_freq_seg2_idx)
307 vht_chandef.center_freq2 =
308 ieee80211_channel_to_frequency(
309 vht_oper->center_freq_seg2_idx,
310 channel->band);
311
312 switch (vht_oper->chan_width) {
313 case IEEE80211_VHT_CHANWIDTH_USE_HT:
314 vht_chandef.width = chandef->width;
315 break;
316 case IEEE80211_VHT_CHANWIDTH_80MHZ:
317 vht_chandef.width = NL80211_CHAN_WIDTH_80;
318 break;
319 case IEEE80211_VHT_CHANWIDTH_160MHZ:
320 vht_chandef.width = NL80211_CHAN_WIDTH_160;
321 break;
322 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
323 vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
324 break;
325 default:
30eb1dc2
JB		 326 if (verbose)
327 sdata_info(sdata,
328 "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
329 vht_oper->chan_width);
6565ec9b
JB		 330 ret = IEEE80211_STA_DISABLE_VHT;
331 goto out;
332 }
333
334 if (!cfg80211_chandef_valid(&vht_chandef)) {
30eb1dc2
JB		 335 if (verbose)
336 sdata_info(sdata,
337 "AP VHT information is invalid, disable VHT\n");
6565ec9b
JB		 338 ret = IEEE80211_STA_DISABLE_VHT;
339 goto out;
340 }
341
342 if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
343 ret = 0;
344 goto out;
345 }
346
347 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
30eb1dc2
JB		 348 if (verbose)
349 sdata_info(sdata,
350 "AP VHT information doesn't match HT, disable VHT\n");
6565ec9b
JB		 351 ret = IEEE80211_STA_DISABLE_VHT;
352 goto out;
353 }
354
355 *chandef = vht_chandef;
356
357 ret = 0;
358
359out:
586e01ed
JB		 360 /* don't print the message below for VHT mismatch if VHT is disabled */
361 if (ret & IEEE80211_STA_DISABLE_VHT)
362 vht_chandef = *chandef;
363
6565ec9b
JB		 364 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
365 IEEE80211_CHAN_DISABLED)) {
366 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
367 ret = IEEE80211_STA_DISABLE_HT |
368 IEEE80211_STA_DISABLE_VHT;
369 goto out;
370 }
371
372 ret |= chandef_downgrade(chandef);
373 }
374
30eb1dc2 375 if (chandef->width != vht_chandef.width && verbose)
6565ec9b
JB		 376 sdata_info(sdata,
377 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
378
379 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
380 return ret;
381}
382
30eb1dc2
JB		 383static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
384 struct sta_info *sta,
385 const struct ieee80211_ht_operation *ht_oper,
386 const struct ieee80211_vht_operation *vht_oper,
387 const u8 *bssid, u32 *changed)
d5522e03
JB		 388{
389 struct ieee80211_local *local = sdata->local;
30eb1dc2 390 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d5522e03 391 struct ieee80211_supported_band *sband;
55de908a 392 struct ieee80211_channel *chan;
30eb1dc2 393 struct cfg80211_chan_def chandef;
9ed6bcce 394 u16 ht_opmode;
30eb1dc2
JB		 395 u32 flags;
396 enum ieee80211_sta_rx_bandwidth new_sta_bw;
397 int ret;
d5522e03 398
30eb1dc2
JB		 399 /* if HT was/is disabled, don't track any bandwidth changes */
400 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
1128958d
JB		 401 return 0;
402
30eb1dc2
JB		 403 /* don't check VHT if we associated as non-VHT station */
404 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
405 vht_oper = NULL;
406
407 if (WARN_ON_ONCE(!sta))
408 return -EINVAL;
409
f2d9330e 410 chan = sdata->vif.bss_conf.chandef.chan;
55de908a 411 sband = local->hw.wiphy->bands[chan->band];
d5522e03 412
30eb1dc2
JB		 413 /* calculate new channel (type) based on HT/VHT operation IEs */
414 flags = ieee80211_determine_chantype(sdata, sband, chan, ht_oper,
415 vht_oper, &chandef, false);
416
417 /*
418 * Downgrade the new channel if we associated with restricted
419 * capabilities. For example, if we associated as a 20 MHz STA
420 * to a 40 MHz AP (due to regulatory, capabilities or config
421 * reasons) then switching to a 40 MHz channel now won't do us
422 * any good -- we couldn't use it with the AP.
423 */
424 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
425 chandef.width == NL80211_CHAN_WIDTH_80P80)
426 flags |= chandef_downgrade(&chandef);
427 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
428 chandef.width == NL80211_CHAN_WIDTH_160)
429 flags |= chandef_downgrade(&chandef);
430 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
431 chandef.width > NL80211_CHAN_WIDTH_20)
432 flags |= chandef_downgrade(&chandef);
433
434 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
435 return 0;
436
437 sdata_info(sdata,
438 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
439 ifmgd->bssid, chandef.chan->center_freq, chandef.width,
440 chandef.center_freq1, chandef.center_freq2);
441
442 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
443 IEEE80211_STA_DISABLE_VHT |
444 IEEE80211_STA_DISABLE_40MHZ |
445 IEEE80211_STA_DISABLE_80P80MHZ |
446 IEEE80211_STA_DISABLE_160MHZ)) ||
447 !cfg80211_chandef_valid(&chandef)) {
448 sdata_info(sdata,
449 "AP %pM changed bandwidth in a way we can't support - disconnect\n",
450 ifmgd->bssid);
451 return -EINVAL;
452 }
453
454 switch (chandef.width) {
455 case NL80211_CHAN_WIDTH_20_NOHT:
456 case NL80211_CHAN_WIDTH_20:
457 new_sta_bw = IEEE80211_STA_RX_BW_20;
458 break;
4bf88530 459 case NL80211_CHAN_WIDTH_40:
30eb1dc2 460 new_sta_bw = IEEE80211_STA_RX_BW_40;
64f68e5d 461 break;
30eb1dc2
JB		 462 case NL80211_CHAN_WIDTH_80:
463 new_sta_bw = IEEE80211_STA_RX_BW_80;
464 break;
465 case NL80211_CHAN_WIDTH_80P80:
466 case NL80211_CHAN_WIDTH_160:
467 new_sta_bw = IEEE80211_STA_RX_BW_160;
64f68e5d 468 break;
30eb1dc2
JB		 469 default:
470 return -EINVAL;
64f68e5d 471 }
d5522e03 472
30eb1dc2
JB		 473 if (new_sta_bw > sta->cur_max_bandwidth)
474 new_sta_bw = sta->cur_max_bandwidth;
64f68e5d 475
30eb1dc2
JB		 476 if (new_sta_bw < sta->sta.bandwidth) {
477 sta->sta.bandwidth = new_sta_bw;
478 rate_control_rate_update(local, sband, sta,
479 IEEE80211_RC_BW_CHANGED);
480 }
64f68e5d 481
30eb1dc2
JB		 482 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
483 if (ret) {
484 sdata_info(sdata,
485 "AP %pM changed bandwidth to incompatible one - disconnect\n",
486 ifmgd->bssid);
487 return ret;
488 }
7cc44ed4 489
30eb1dc2
JB		 490 if (new_sta_bw > sta->sta.bandwidth) {
491 sta->sta.bandwidth = new_sta_bw;
492 rate_control_rate_update(local, sband, sta,
493 IEEE80211_RC_BW_CHANGED);
0aaffa9b 494 }
d5522e03 495
074d46d1 496 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
d5522e03
JB		 497
498 /* if bss configuration changed store the new one */
30eb1dc2
JB		 499 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
500 *changed |= BSS_CHANGED_HT;
9ed6bcce 501 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
d5522e03
JB		 502 }
503
30eb1dc2 504 return 0;
d5522e03
JB		 505}
506
9c6bd790
JB		 507/* frame sending functions */
508
66e67e41
JB		 509static int ieee80211_compatible_rates(const u8 *supp_rates, int supp_rates_len,
510 struct ieee80211_supported_band *sband,
511 u32 *rates)
512{
513 int i, j, count;
514 *rates = 0;
515 count = 0;
516 for (i = 0; i < supp_rates_len; i++) {
517 int rate = (supp_rates[i] & 0x7F) * 5;
518
519 for (j = 0; j < sband->n_bitrates; j++)
520 if (sband->bitrates[j].bitrate == rate) {
521 *rates |= BIT(j);
522 count++;
523 break;
524 }
525 }
526
527 return count;
528}
529
530static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
9dde6423 531 struct sk_buff *skb, u8 ap_ht_param,
66e67e41
JB		 532 struct ieee80211_supported_band *sband,
533 struct ieee80211_channel *channel,
534 enum ieee80211_smps_mode smps)
535{
66e67e41
JB		 536 u8 *pos;
537 u32 flags = channel->flags;
538 u16 cap;
539 struct ieee80211_sta_ht_cap ht_cap;
540
541 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
542
66e67e41
JB		 543 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
544 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
545
66e67e41
JB		 546 /* determine capability flags */
547 cap = ht_cap.cap;
548
9dde6423 549 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
66e67e41
JB		 550 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
551 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
552 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
553 cap &= ~IEEE80211_HT_CAP_SGI_40;
554 }
555 break;
556 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
557 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
558 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
559 cap &= ~IEEE80211_HT_CAP_SGI_40;
560 }
561 break;
562 }
563
24398e39
JB		 564 /*
565 * If 40 MHz was disabled associate as though we weren't
566 * capable of 40 MHz -- some broken APs will never fall
567 * back to trying to transmit in 20 MHz.
568 */
569 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
570 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
571 cap &= ~IEEE80211_HT_CAP_SGI_40;
572 }
573
66e67e41
JB		 574 /* set SM PS mode properly */
575 cap &= ~IEEE80211_HT_CAP_SM_PS;
576 switch (smps) {
577 case IEEE80211_SMPS_AUTOMATIC:
578 case IEEE80211_SMPS_NUM_MODES:
579 WARN_ON(1);
580 case IEEE80211_SMPS_OFF:
581 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
582 IEEE80211_HT_CAP_SM_PS_SHIFT;
583 break;
584 case IEEE80211_SMPS_STATIC:
585 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
586 IEEE80211_HT_CAP_SM_PS_SHIFT;
587 break;
588 case IEEE80211_SMPS_DYNAMIC:
589 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
590 IEEE80211_HT_CAP_SM_PS_SHIFT;
591 break;
592 }
593
594 /* reserve and fill IE */
595 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
596 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
597}
598
d545daba
MP		 599static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
600 struct sk_buff *skb,
b08fbbd8
JB		 601 struct ieee80211_supported_band *sband,
602 struct ieee80211_vht_cap *ap_vht_cap)
d545daba
MP		 603{
604 u8 *pos;
605 u32 cap;
606 struct ieee80211_sta_vht_cap vht_cap;
b08fbbd8 607 int i;
d545daba
MP		 608
609 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
610
611 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
dd5ecfea 612 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
d545daba
MP		 613
614 /* determine capability flags */
615 cap = vht_cap.cap;
616
f2d9d270
JB		 617 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
618 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ;
619 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
620 }
621
622 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
623 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
624 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
625 }
626
b08fbbd8
JB		 627 /*
628 * Some APs apparently get confused if our capabilities are better
629 * than theirs, so restrict what we advertise in the assoc request.
630 */
631 if (!(ap_vht_cap->vht_cap_info &
632 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
633 cap &= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE;
634
635 if (!(ap_vht_cap->vht_cap_info &
636 cpu_to_le32(IEEE80211_VHT_CAP_TXSTBC)))
637 cap &= ~(IEEE80211_VHT_CAP_RXSTBC_1 |
638 IEEE80211_VHT_CAP_RXSTBC_3 |
639 IEEE80211_VHT_CAP_RXSTBC_4);
640
641 for (i = 0; i < 8; i++) {
642 int shift = i * 2;
643 u16 mask = IEEE80211_VHT_MCS_NOT_SUPPORTED << shift;
644 u16 ap_mcs, our_mcs;
645
646 ap_mcs = (le16_to_cpu(ap_vht_cap->supp_mcs.tx_mcs_map) &
647 mask) >> shift;
648 our_mcs = (le16_to_cpu(vht_cap.vht_mcs.rx_mcs_map) &
649 mask) >> shift;
650
24af717c
JB		 651 if (our_mcs == IEEE80211_VHT_MCS_NOT_SUPPORTED)
652 continue;
653
b08fbbd8
JB		 654 switch (ap_mcs) {
655 default:
656 if (our_mcs <= ap_mcs)
657 break;
658 /* fall through */
659 case IEEE80211_VHT_MCS_NOT_SUPPORTED:
660 vht_cap.vht_mcs.rx_mcs_map &= cpu_to_le16(~mask);
661 vht_cap.vht_mcs.rx_mcs_map |=
662 cpu_to_le16(ap_mcs << shift);
663 }
664 }
665
d545daba 666 /* reserve and fill IE */
d4950281 667 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
d545daba
MP		 668 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
669}
670
66e67e41
JB		 671static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
672{
673 struct ieee80211_local *local = sdata->local;
674 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
675 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
676 struct sk_buff *skb;
677 struct ieee80211_mgmt *mgmt;
678 u8 *pos, qos_info;
679 size_t offset = 0, noffset;
680 int i, count, rates_len, supp_rates_len;
681 u16 capab;
682 struct ieee80211_supported_band *sband;
55de908a
JB		 683 struct ieee80211_chanctx_conf *chanctx_conf;
684 struct ieee80211_channel *chan;
66e67e41 685 u32 rates = 0;
66e67e41
JB		 686
687 lockdep_assert_held(&ifmgd->mtx);
688
55de908a
JB		 689 rcu_read_lock();
690 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
691 if (WARN_ON(!chanctx_conf)) {
692 rcu_read_unlock();
693 return;
694 }
4bf88530 695 chan = chanctx_conf->def.chan;
55de908a
JB		 696 rcu_read_unlock();
697 sband = local->hw.wiphy->bands[chan->band];
66e67e41
JB		 698
699 if (assoc_data->supp_rates_len) {
700 /*
701 * Get all rates supported by the device and the AP as
702 * some APs don't like getting a superset of their rates
703 * in the association request (e.g. D-Link DAP 1353 in
704 * b-only mode)...
705 */
706 rates_len = ieee80211_compatible_rates(assoc_data->supp_rates,
707 assoc_data->supp_rates_len,
708 sband, &rates);
709 } else {
710 /*
711 * In case AP not provide any supported rates information
712 * before association, we send information element(s) with
713 * all rates that we support.
714 */
715 rates = ~0;
716 rates_len = sband->n_bitrates;
717 }
718
719 skb = alloc_skb(local->hw.extra_tx_headroom +
720 sizeof(*mgmt) + /* bit too much but doesn't matter */
721 2 + assoc_data->ssid_len + /* SSID */
722 4 + rates_len + /* (extended) rates */
723 4 + /* power capability */
724 2 + 2 * sband->n_channels + /* supported channels */
725 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
d4950281 726 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
66e67e41
JB		 727 assoc_data->ie_len + /* extra IEs */
728 9, /* WMM */
729 GFP_KERNEL);
730 if (!skb)
731 return;
732
733 skb_reserve(skb, local->hw.extra_tx_headroom);
734
735 capab = WLAN_CAPABILITY_ESS;
736
737 if (sband->band == IEEE80211_BAND_2GHZ) {
738 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
739 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
740 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
741 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
742 }
743
744 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
745 capab |= WLAN_CAPABILITY_PRIVACY;
746
747 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
748 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
749 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
750
751 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
752 memset(mgmt, 0, 24);
753 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
754 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
755 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
756
757 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
758 skb_put(skb, 10);
759 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
760 IEEE80211_STYPE_REASSOC_REQ);
761 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
762 mgmt->u.reassoc_req.listen_interval =
763 cpu_to_le16(local->hw.conf.listen_interval);
764 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
765 ETH_ALEN);
766 } else {
767 skb_put(skb, 4);
768 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
769 IEEE80211_STYPE_ASSOC_REQ);
770 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
771 mgmt->u.assoc_req.listen_interval =
772 cpu_to_le16(local->hw.conf.listen_interval);
773 }
774
775 /* SSID */
776 pos = skb_put(skb, 2 + assoc_data->ssid_len);
777 *pos++ = WLAN_EID_SSID;
778 *pos++ = assoc_data->ssid_len;
779 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
780
781 /* add all rates which were marked to be used above */
782 supp_rates_len = rates_len;
783 if (supp_rates_len > 8)
784 supp_rates_len = 8;
785
786 pos = skb_put(skb, supp_rates_len + 2);
787 *pos++ = WLAN_EID_SUPP_RATES;
788 *pos++ = supp_rates_len;
789
790 count = 0;
791 for (i = 0; i < sband->n_bitrates; i++) {
792 if (BIT(i) & rates) {
793 int rate = sband->bitrates[i].bitrate;
794 *pos++ = (u8) (rate / 5);
795 if (++count == 8)
796 break;
797 }
798 }
799
800 if (rates_len > count) {
801 pos = skb_put(skb, rates_len - count + 2);
802 *pos++ = WLAN_EID_EXT_SUPP_RATES;
803 *pos++ = rates_len - count;
804
805 for (i++; i < sband->n_bitrates; i++) {
806 if (BIT(i) & rates) {
807 int rate = sband->bitrates[i].bitrate;
808 *pos++ = (u8) (rate / 5);
809 }
810 }
811 }
812
813 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
814 /* 1. power capabilities */
815 pos = skb_put(skb, 4);
816 *pos++ = WLAN_EID_PWR_CAPABILITY;
817 *pos++ = 2;
818 *pos++ = 0; /* min tx power */
55de908a 819 *pos++ = chan->max_power; /* max tx power */
66e67e41
JB		 820
821 /* 2. supported channels */
822 /* TODO: get this in reg domain format */
823 pos = skb_put(skb, 2 * sband->n_channels + 2);
824 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
825 *pos++ = 2 * sband->n_channels;
826 for (i = 0; i < sband->n_channels; i++) {
827 *pos++ = ieee80211_frequency_to_channel(
828 sband->channels[i].center_freq);
829 *pos++ = 1; /* one channel in the subband*/
830 }
831 }
832
833 /* if present, add any custom IEs that go before HT */
834 if (assoc_data->ie_len && assoc_data->ie) {
835 static const u8 before_ht[] = {
836 WLAN_EID_SSID,
837 WLAN_EID_SUPP_RATES,
838 WLAN_EID_EXT_SUPP_RATES,
839 WLAN_EID_PWR_CAPABILITY,
840 WLAN_EID_SUPPORTED_CHANNELS,
841 WLAN_EID_RSN,
842 WLAN_EID_QOS_CAPA,
843 WLAN_EID_RRM_ENABLED_CAPABILITIES,
844 WLAN_EID_MOBILITY_DOMAIN,
845 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
846 };
847 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
848 before_ht, ARRAY_SIZE(before_ht),
849 offset);
850 pos = skb_put(skb, noffset - offset);
851 memcpy(pos, assoc_data->ie + offset, noffset - offset);
852 offset = noffset;
853 }
854
f2d9d270
JB		 855 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
856 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
857 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
858
a8243b72 859 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
9dde6423 860 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
04ecd257 861 sband, chan, sdata->smps_mode);
66e67e41 862
d545daba 863 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
b08fbbd8
JB		 864 ieee80211_add_vht_ie(sdata, skb, sband,
865 &assoc_data->ap_vht_cap);
d545daba 866
66e67e41
JB		 867 /* if present, add any custom non-vendor IEs that go after HT */
868 if (assoc_data->ie_len && assoc_data->ie) {
869 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
870 assoc_data->ie_len,
871 offset);
872 pos = skb_put(skb, noffset - offset);
873 memcpy(pos, assoc_data->ie + offset, noffset - offset);
874 offset = noffset;
875 }
876
76f0303d
JB		 877 if (assoc_data->wmm) {
878 if (assoc_data->uapsd) {
dc41e4d4
EP		 879 qos_info = ifmgd->uapsd_queues;
880 qos_info |= (ifmgd->uapsd_max_sp_len <<
66e67e41
JB		 881 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
882 } else {
883 qos_info = 0;
884 }
885
886 pos = skb_put(skb, 9);
887 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
888 *pos++ = 7; /* len */
889 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
890 *pos++ = 0x50;
891 *pos++ = 0xf2;
892 *pos++ = 2; /* WME */
893 *pos++ = 0; /* WME info */
894 *pos++ = 1; /* WME ver */
895 *pos++ = qos_info;
896 }
897
898 /* add any remaining custom (i.e. vendor specific here) IEs */
899 if (assoc_data->ie_len && assoc_data->ie) {
900 noffset = assoc_data->ie_len;
901 pos = skb_put(skb, noffset - offset);
902 memcpy(pos, assoc_data->ie + offset, noffset - offset);
903 }
904
a1845fc7
JB		 905 drv_mgd_prepare_tx(local, sdata);
906
66e67e41 907 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1672c0e3
JB		 908 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
909 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
910 IEEE80211_TX_INTFL_MLME_CONN_TX;
66e67e41
JB		 911 ieee80211_tx_skb(sdata, skb);
912}
913
572e0012
KV		 914void ieee80211_send_pspoll(struct ieee80211_local *local,
915 struct ieee80211_sub_if_data *sdata)
916{
572e0012
KV		 917 struct ieee80211_pspoll *pspoll;
918 struct sk_buff *skb;
572e0012 919
d8cd189e
KV		 920 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
921 if (!skb)
572e0012 922 return;
572e0012 923
d8cd189e
KV		 924 pspoll = (struct ieee80211_pspoll *) skb->data;
925 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
572e0012 926
62ae67be
JB		 927 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
928 ieee80211_tx_skb(sdata, skb);
572e0012
KV		 929}
930
965bedad
JB		 931void ieee80211_send_nullfunc(struct ieee80211_local *local,
932 struct ieee80211_sub_if_data *sdata,
933 int powersave)
934{
935 struct sk_buff *skb;
d8cd189e 936 struct ieee80211_hdr_3addr *nullfunc;
b6f35301 937 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
965bedad 938
d8cd189e
KV		 939 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
940 if (!skb)
965bedad 941 return;
965bedad 942
d8cd189e 943 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
965bedad 944 if (powersave)
d8cd189e 945 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
965bedad 946
6c17b77b
SF		 947 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
948 IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
b6f35301
RM		 949 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
950 IEEE80211_STA_CONNECTION_POLL))
951 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
952
62ae67be 953 ieee80211_tx_skb(sdata, skb);
965bedad
JB		 954}
955
d524215f
FF		 956static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
957 struct ieee80211_sub_if_data *sdata)
958{
959 struct sk_buff *skb;
960 struct ieee80211_hdr *nullfunc;
961 __le16 fc;
962
963 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
964 return;
965
966 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
d15b8459 967 if (!skb)
d524215f 968 return;
d15b8459 969
d524215f
FF		 970 skb_reserve(skb, local->hw.extra_tx_headroom);
971
972 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
973 memset(nullfunc, 0, 30);
974 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
975 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
976 nullfunc->frame_control = fc;
977 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
978 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
979 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
980 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
981
982 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
983 ieee80211_tx_skb(sdata, skb);
984}
985
cc32abd4
JB		 986/* spectrum management related things */
987static void ieee80211_chswitch_work(struct work_struct *work)
988{
989 struct ieee80211_sub_if_data *sdata =
990 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
cc32abd4
JB		 991 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
992
9607e6b6 993 if (!ieee80211_sdata_running(sdata))
cc32abd4
JB		 994 return;
995
77fdaa12
JB		 996 mutex_lock(&ifmgd->mtx);
997 if (!ifmgd->associated)
998 goto out;
cc32abd4 999
55de908a 1000 sdata->local->_oper_channel = sdata->local->csa_channel;
5ce6e438
JB		 1001 if (!sdata->local->ops->channel_switch) {
1002 /* call "hw_config" only if doing sw channel switch */
1003 ieee80211_hw_config(sdata->local,
1004 IEEE80211_CONF_CHANGE_CHANNEL);
1ea57b1f
SL		 1005 } else {
1006 /* update the device channel directly */
55de908a 1007 sdata->local->hw.conf.channel = sdata->local->_oper_channel;
5ce6e438 1008 }
77fdaa12 1009
cc32abd4 1010 /* XXX: shouldn't really modify cfg80211-owned data! */
55de908a 1011 ifmgd->associated->channel = sdata->local->_oper_channel;
cc32abd4 1012
57eebdf3 1013 /* XXX: wait for a beacon first? */
cc32abd4 1014 ieee80211_wake_queues_by_reason(&sdata->local->hw,
445ea4e8 1015 IEEE80211_MAX_QUEUE_MAP,
cc32abd4 1016 IEEE80211_QUEUE_STOP_REASON_CSA);
77fdaa12
JB		 1017 out:
1018 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
1019 mutex_unlock(&ifmgd->mtx);
cc32abd4
JB		 1020}
1021
5ce6e438
JB		 1022void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1023{
55de908a
JB		 1024 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1025 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5ce6e438
JB		 1026
1027 trace_api_chswitch_done(sdata, success);
1028 if (!success) {
882a7c69
JB		 1029 sdata_info(sdata,
1030 "driver channel switch failed, disconnecting\n");
1031 ieee80211_queue_work(&sdata->local->hw,
1032 &ifmgd->csa_connection_drop_work);
1033 } else {
1034 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
5ce6e438 1035 }
5ce6e438
JB		 1036}
1037EXPORT_SYMBOL(ieee80211_chswitch_done);
1038
cc32abd4
JB		 1039static void ieee80211_chswitch_timer(unsigned long data)
1040{
1041 struct ieee80211_sub_if_data *sdata =
1042 (struct ieee80211_sub_if_data *) data;
5bb644a0 1043
9b7d72c1 1044 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
cc32abd4
JB		 1045}
1046
4a3cb702
JB		 1047void
1048ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1049 const struct ieee80211_channel_sw_ie *sw_elem,
1050 struct ieee80211_bss *bss, u64 timestamp)
cc32abd4 1051{
0c1ad2ca
JB		 1052 struct cfg80211_bss *cbss =
1053 container_of((void *)bss, struct cfg80211_bss, priv);
cc32abd4
JB		 1054 struct ieee80211_channel *new_ch;
1055 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
59eb21a6
BR		 1056 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num,
1057 cbss->channel->band);
55de908a 1058 struct ieee80211_chanctx *chanctx;
cc32abd4 1059
77fdaa12
JB		 1060 ASSERT_MGD_MTX(ifmgd);
1061
1062 if (!ifmgd->associated)
cc32abd4
JB		 1063 return;
1064
fbe9c429 1065 if (sdata->local->scanning)
cc32abd4
JB		 1066 return;
1067
1068 /* Disregard subsequent beacons if we are already running a timer
1069 processing a CSA */
1070
1071 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
1072 return;
1073
1074 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
882a7c69
JB		 1075 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED) {
1076 sdata_info(sdata,
1077 "AP %pM switches to unsupported channel (%d MHz), disconnecting\n",
1078 ifmgd->associated->bssid, new_freq);
1079 ieee80211_queue_work(&sdata->local->hw,
1080 &ifmgd->csa_connection_drop_work);
cc32abd4 1081 return;
882a7c69 1082 }
cc32abd4 1083
57eebdf3
JB		 1084 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
1085
55de908a
JB		 1086 if (sdata->local->use_chanctx) {
1087 sdata_info(sdata,
1088 "not handling channel switch with channel contexts\n");
1089 ieee80211_queue_work(&sdata->local->hw,
1090 &ifmgd->csa_connection_drop_work);
246dc3fd 1091 return;
55de908a
JB		 1092 }
1093
1094 mutex_lock(&sdata->local->chanctx_mtx);
1095 if (WARN_ON(!rcu_access_pointer(sdata->vif.chanctx_conf))) {
1096 mutex_unlock(&sdata->local->chanctx_mtx);
1097 return;
1098 }
1099 chanctx = container_of(rcu_access_pointer(sdata->vif.chanctx_conf),
1100 struct ieee80211_chanctx, conf);
1101 if (chanctx->refcount > 1) {
1102 sdata_info(sdata,
1103 "channel switch with multiple interfaces on the same channel, disconnecting\n");
1104 ieee80211_queue_work(&sdata->local->hw,
1105 &ifmgd->csa_connection_drop_work);
1106 mutex_unlock(&sdata->local->chanctx_mtx);
1107 return;
1108 }
1109 mutex_unlock(&sdata->local->chanctx_mtx);
1110
1111 sdata->local->csa_channel = new_ch;
1112
57eebdf3
JB		 1113 if (sw_elem->mode)
1114 ieee80211_stop_queues_by_reason(&sdata->local->hw,
445ea4e8 1115 IEEE80211_MAX_QUEUE_MAP,
57eebdf3
JB		 1116 IEEE80211_QUEUE_STOP_REASON_CSA);
1117
5ce6e438
JB		 1118 if (sdata->local->ops->channel_switch) {
1119 /* use driver's channel switch callback */
57eebdf3
JB		 1120 struct ieee80211_channel_switch ch_switch = {
1121 .timestamp = timestamp,
1122 .block_tx = sw_elem->mode,
1123 .channel = new_ch,
1124 .count = sw_elem->count,
1125 };
1126
5ce6e438
JB		 1127 drv_channel_switch(sdata->local, &ch_switch);
1128 return;
1129 }
1130
1131 /* channel switch handled in software */
57eebdf3 1132 if (sw_elem->count <= 1)
42935eca 1133 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
57eebdf3 1134 else
cc32abd4 1135 mod_timer(&ifmgd->chswitch_timer,
3049000b
JB		 1136 TU_TO_EXP_TIME(sw_elem->count *
1137 cbss->beacon_interval));
cc32abd4
JB		 1138}
1139
1ea6f9c0
JB		 1140static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1141 struct ieee80211_channel *channel,
1142 const u8 *country_ie, u8 country_ie_len,
1143 const u8 *pwr_constr_elem)
cc32abd4 1144{
04b7b2ff
JB		 1145 struct ieee80211_country_ie_triplet *triplet;
1146 int chan = ieee80211_frequency_to_channel(channel->center_freq);
1147 int i, chan_pwr, chan_increment, new_ap_level;
1148 bool have_chan_pwr = false;
cc32abd4 1149
04b7b2ff
JB		 1150 /* Invalid IE */
1151 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1ea6f9c0 1152 return 0;
cc32abd4 1153
04b7b2ff
JB		 1154 triplet = (void *)(country_ie + 3);
1155 country_ie_len -= 3;
1156
1157 switch (channel->band) {
1158 default:
1159 WARN_ON_ONCE(1);
1160 /* fall through */
1161 case IEEE80211_BAND_2GHZ:
1162 case IEEE80211_BAND_60GHZ:
1163 chan_increment = 1;
1164 break;
1165 case IEEE80211_BAND_5GHZ:
1166 chan_increment = 4;
1167 break;
cc32abd4 1168 }
04b7b2ff
JB		 1169
1170 /* find channel */
1171 while (country_ie_len >= 3) {
1172 u8 first_channel = triplet->chans.first_channel;
1173
1174 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1175 goto next;
1176
1177 for (i = 0; i < triplet->chans.num_channels; i++) {
1178 if (first_channel + i * chan_increment == chan) {
1179 have_chan_pwr = true;
1180 chan_pwr = triplet->chans.max_power;
1181 break;
1182 }
1183 }
1184 if (have_chan_pwr)
1185 break;
1186
1187 next:
1188 triplet++;
1189 country_ie_len -= 3;
1190 }
1191
1192 if (!have_chan_pwr)
1ea6f9c0 1193 return 0;
04b7b2ff
JB		 1194
1195 new_ap_level = max_t(int, 0, chan_pwr - *pwr_constr_elem);
1196
1ea6f9c0
JB		 1197 if (sdata->ap_power_level == new_ap_level)
1198 return 0;
04b7b2ff
JB		 1199
1200 sdata_info(sdata,
1201 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1202 new_ap_level, chan_pwr, *pwr_constr_elem,
1203 sdata->u.mgd.bssid);
1ea6f9c0
JB		 1204 sdata->ap_power_level = new_ap_level;
1205 if (__ieee80211_recalc_txpower(sdata))
1206 return BSS_CHANGED_TXPOWER;
1207 return 0;
cc32abd4
JB		 1208}
1209
965bedad
JB		 1210/* powersave */
1211static void ieee80211_enable_ps(struct ieee80211_local *local,
1212 struct ieee80211_sub_if_data *sdata)
1213{
1214 struct ieee80211_conf *conf = &local->hw.conf;
1215
d5edaedc
JB		 1216 /*
1217 * If we are scanning right now then the parameters will
1218 * take effect when scan finishes.
1219 */
fbe9c429 1220 if (local->scanning)
d5edaedc
JB		 1221 return;
1222
965bedad
JB		 1223 if (conf->dynamic_ps_timeout > 0 &&
1224 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
1225 mod_timer(&local->dynamic_ps_timer, jiffies +
1226 msecs_to_jiffies(conf->dynamic_ps_timeout));
1227 } else {
1228 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1229 ieee80211_send_nullfunc(local, sdata, 1);
375177bf 1230
2a13052f
JO		 1231 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1232 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
1233 return;
1234
1235 conf->flags |= IEEE80211_CONF_PS;
1236 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965bedad
JB		 1237 }
1238}
1239
1240static void ieee80211_change_ps(struct ieee80211_local *local)
1241{
1242 struct ieee80211_conf *conf = &local->hw.conf;
1243
1244 if (local->ps_sdata) {
965bedad
JB		 1245 ieee80211_enable_ps(local, local->ps_sdata);
1246 } else if (conf->flags & IEEE80211_CONF_PS) {
1247 conf->flags &= ~IEEE80211_CONF_PS;
1248 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1249 del_timer_sync(&local->dynamic_ps_timer);
1250 cancel_work_sync(&local->dynamic_ps_enable_work);
1251 }
1252}
1253
808118cb
JY		 1254static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1255{
1256 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1257 struct sta_info *sta = NULL;
c2c98fde 1258 bool authorized = false;
808118cb
JY		 1259
1260 if (!mgd->powersave)
1261 return false;
1262
05cb9108
JB		 1263 if (mgd->broken_ap)
1264 return false;
1265
808118cb
JY		 1266 if (!mgd->associated)
1267 return false;
1268
808118cb
JY		 1269 if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
1270 IEEE80211_STA_CONNECTION_POLL))
1271 return false;
1272
1273 rcu_read_lock();
1274 sta = sta_info_get(sdata, mgd->bssid);
1275 if (sta)
c2c98fde 1276 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
808118cb
JY		 1277 rcu_read_unlock();
1278
c2c98fde 1279 return authorized;
808118cb
JY		 1280}
1281
965bedad 1282/* need to hold RTNL or interface lock */
10f644a4 1283void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 1284{
1285 struct ieee80211_sub_if_data *sdata, *found = NULL;
1286 int count = 0;
195e294d 1287 int timeout;
965bedad
JB		 1288
1289 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
1290 local->ps_sdata = NULL;
1291 return;
1292 }
1293
1294 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 1295 if (!ieee80211_sdata_running(sdata))
965bedad 1296 continue;
8c7914de
RM		 1297 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1298 /* If an AP vif is found, then disable PS
1299 * by setting the count to zero thereby setting
1300 * ps_sdata to NULL.
1301 */
1302 count = 0;
1303 break;
1304 }
965bedad
JB		 1305 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1306 continue;
1307 found = sdata;
1308 count++;
1309 }
1310
808118cb 1311 if (count == 1 && ieee80211_powersave_allowed(found)) {
10f644a4
JB		 1312 s32 beaconint_us;
1313
1314 if (latency < 0)
ed77134b 1315 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
10f644a4
JB		 1316
1317 beaconint_us = ieee80211_tu_to_usec(
1318 found->vif.bss_conf.beacon_int);
1319
ff616381 1320 timeout = local->dynamic_ps_forced_timeout;
195e294d
JO		 1321 if (timeout < 0) {
1322 /*
ff616381
JO		 1323 * Go to full PSM if the user configures a very low
1324 * latency requirement.
0ab82b04
EP		 1325 * The 2000 second value is there for compatibility
1326 * until the PM_QOS_NETWORK_LATENCY is configured
1327 * with real values.
195e294d 1328 */
0ab82b04
EP		 1329 if (latency > (1900 * USEC_PER_MSEC) &&
1330 latency != (2000 * USEC_PER_SEC))
195e294d 1331 timeout = 0;
ff616381
JO		 1332 else
1333 timeout = 100;
195e294d 1334 }
09b85568 1335 local->hw.conf.dynamic_ps_timeout = timeout;
195e294d 1336
04fe2037 1337 if (beaconint_us > latency) {
10f644a4 1338 local->ps_sdata = NULL;
04fe2037 1339 } else {
04fe2037 1340 int maxslp = 1;
826262c3 1341 u8 dtimper = found->u.mgd.dtim_period;
56007a02
JB		 1342
1343 /* If the TIM IE is invalid, pretend the value is 1 */
1344 if (!dtimper)
1345 dtimper = 1;
1346 else if (dtimper > 1)
04fe2037
JB		 1347 maxslp = min_t(int, dtimper,
1348 latency / beaconint_us);
1349
9ccebe61 1350 local->hw.conf.max_sleep_period = maxslp;
56007a02 1351 local->hw.conf.ps_dtim_period = dtimper;
10f644a4 1352 local->ps_sdata = found;
04fe2037 1353 }
10f644a4 1354 } else {
965bedad 1355 local->ps_sdata = NULL;
10f644a4 1356 }
965bedad
JB		 1357
1358 ieee80211_change_ps(local);
1359}
1360
ab095877
EP		 1361void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1362{
1363 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1364
1365 if (sdata->vif.bss_conf.ps != ps_allowed) {
1366 sdata->vif.bss_conf.ps = ps_allowed;
1367 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1368 }
1369}
1370
965bedad
JB		 1371void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1372{
1373 struct ieee80211_local *local =
1374 container_of(work, struct ieee80211_local,
1375 dynamic_ps_disable_work);
1376
1377 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1378 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1379 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1380 }
1381
1382 ieee80211_wake_queues_by_reason(&local->hw,
445ea4e8 1383 IEEE80211_MAX_QUEUE_MAP,
965bedad
JB		 1384 IEEE80211_QUEUE_STOP_REASON_PS);
1385}
1386
1387void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1388{
1389 struct ieee80211_local *local =
1390 container_of(work, struct ieee80211_local,
1391 dynamic_ps_enable_work);
1392 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
5e34069c 1393 struct ieee80211_if_managed *ifmgd;
1ddc2867
RM		 1394 unsigned long flags;
1395 int q;
965bedad
JB		 1396
1397 /* can only happen when PS was just disabled anyway */
1398 if (!sdata)
1399 return;
1400
5e34069c
CL		 1401 ifmgd = &sdata->u.mgd;
1402
965bedad
JB		 1403 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1404 return;
1405
09b85568 1406 if (local->hw.conf.dynamic_ps_timeout > 0) {
77b7023a
AN		 1407 /* don't enter PS if TX frames are pending */
1408 if (drv_tx_frames_pending(local)) {
1ddc2867
RM		 1409 mod_timer(&local->dynamic_ps_timer, jiffies +
1410 msecs_to_jiffies(
1411 local->hw.conf.dynamic_ps_timeout));
1412 return;
1413 }
77b7023a
AN		 1414
1415 /*
1416 * transmission can be stopped by others which leads to
1417 * dynamic_ps_timer expiry. Postpone the ps timer if it
1418 * is not the actual idle state.
1419 */
1420 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1421 for (q = 0; q < local->hw.queues; q++) {
1422 if (local->queue_stop_reasons[q]) {
1423 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1424 flags);
1425 mod_timer(&local->dynamic_ps_timer, jiffies +
1426 msecs_to_jiffies(
1427 local->hw.conf.dynamic_ps_timeout));
1428 return;
1429 }
1430 }
1431 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1ddc2867 1432 }
1ddc2867 1433
375177bf 1434 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
9c38a8b4 1435 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
f3e85b9e 1436 netif_tx_stop_all_queues(sdata->dev);
965bedad 1437
e8306f98
VN		 1438 if (drv_tx_frames_pending(local))
1439 mod_timer(&local->dynamic_ps_timer, jiffies +
1440 msecs_to_jiffies(
1441 local->hw.conf.dynamic_ps_timeout));
1442 else {
1443 ieee80211_send_nullfunc(local, sdata, 1);
1444 /* Flush to get the tx status of nullfunc frame */
39ecc01d 1445 ieee80211_flush_queues(local, sdata);
e8306f98 1446 }
f3e85b9e
VN		 1447 }
1448
2a13052f
JO		 1449 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1450 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
375177bf
VN		 1451 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1452 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1453 local->hw.conf.flags |= IEEE80211_CONF_PS;
1454 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1455 }
f3e85b9e 1456
77b7023a
AN		 1457 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1458 netif_tx_wake_all_queues(sdata->dev);
965bedad
JB		 1459}
1460
1461void ieee80211_dynamic_ps_timer(unsigned long data)
1462{
1463 struct ieee80211_local *local = (void *) data;
1464
78f1a8b7 1465 if (local->quiescing || local->suspended)
5bb644a0
JB		 1466 return;
1467
42935eca 1468 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 1469}
1470
164eb02d
SW		 1471void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1472{
1473 struct delayed_work *delayed_work =
1474 container_of(work, struct delayed_work, work);
1475 struct ieee80211_sub_if_data *sdata =
1476 container_of(delayed_work, struct ieee80211_sub_if_data,
1477 dfs_cac_timer_work);
1478
1479 ieee80211_vif_release_channel(sdata);
1480
1481 cfg80211_cac_event(sdata->dev, NL80211_RADAR_CAC_FINISHED, GFP_KERNEL);
1482}
1483
60f8b39c 1484/* MLME */
7d25745d 1485static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
4ced3f74 1486 struct ieee80211_sub_if_data *sdata,
4a3cb702 1487 const u8 *wmm_param, size_t wmm_param_len)
f0706e82 1488{
f0706e82 1489 struct ieee80211_tx_queue_params params;
4ced3f74 1490 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1491 size_t left;
1492 int count;
4a3cb702
JB		 1493 const u8 *pos;
1494 u8 uapsd_queues = 0;
f0706e82 1495
e1b3ec1a 1496 if (!local->ops->conf_tx)
7d25745d 1497 return false;
e1b3ec1a 1498
32c5057b 1499 if (local->hw.queues < IEEE80211_NUM_ACS)
7d25745d 1500 return false;
3434fbd3
JB		 1501
1502 if (!wmm_param)
7d25745d 1503 return false;
3434fbd3 1504
f0706e82 1505 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
7d25745d 1506 return false;
ab13315a
KV		 1507
1508 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
dc41e4d4 1509 uapsd_queues = ifmgd->uapsd_queues;
ab13315a 1510
f0706e82 1511 count = wmm_param[6] & 0x0f;
46900298 1512 if (count == ifmgd->wmm_last_param_set)
7d25745d 1513 return false;
46900298 1514 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 1515
1516 pos = wmm_param + 8;
1517 left = wmm_param_len - 8;
1518
1519 memset(&params, 0, sizeof(params));
1520
00e96dec 1521 sdata->wmm_acm = 0;
f0706e82
JB		 1522 for (; left >= 4; left -= 4, pos += 4) {
1523 int aci = (pos[0] >> 5) & 0x03;
1524 int acm = (pos[0] >> 4) & 0x01;
ab13315a 1525 bool uapsd = false;
f0706e82
JB		 1526 int queue;
1527
1528 switch (aci) {
0eeb59fe 1529 case 1: /* AC_BK */
e100bb64 1530 queue = 3;
988c0f72 1531 if (acm)
00e96dec 1532 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV		 1533 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1534 uapsd = true;
f0706e82 1535 break;
0eeb59fe 1536 case 2: /* AC_VI */
e100bb64 1537 queue = 1;
988c0f72 1538 if (acm)
00e96dec 1539 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV		 1540 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1541 uapsd = true;
f0706e82 1542 break;
0eeb59fe 1543 case 3: /* AC_VO */
e100bb64 1544 queue = 0;
988c0f72 1545 if (acm)
00e96dec 1546 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV		 1547 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1548 uapsd = true;
f0706e82 1549 break;
0eeb59fe 1550 case 0: /* AC_BE */
f0706e82 1551 default:
e100bb64 1552 queue = 2;
988c0f72 1553 if (acm)
00e96dec 1554 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV		 1555 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1556 uapsd = true;
f0706e82
JB		 1557 break;
1558 }
1559
1560 params.aifs = pos[0] & 0x0f;
1561 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1562 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 1563 params.txop = get_unaligned_le16(pos + 2);
ab13315a
KV		 1564 params.uapsd = uapsd;
1565
bdcbd8e0
JB		 1566 mlme_dbg(sdata,
1567 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1568 queue, aci, acm,
1569 params.aifs, params.cw_min, params.cw_max,
1570 params.txop, params.uapsd);
f6f3def3
EP		 1571 sdata->tx_conf[queue] = params;
1572 if (drv_conf_tx(local, sdata, queue, &params))
bdcbd8e0
JB		 1573 sdata_err(sdata,
1574 "failed to set TX queue parameters for queue %d\n",
1575 queue);
f0706e82 1576 }
e1b3ec1a
SG		 1577
1578 /* enable WMM or activate new settings */
4ced3f74 1579 sdata->vif.bss_conf.qos = true;
7d25745d 1580 return true;
f0706e82
JB		 1581}
1582
925e64c3
SG		 1583static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1584{
1585 lockdep_assert_held(&sdata->local->mtx);
1586
1587 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1588 IEEE80211_STA_BEACON_POLL);
1589 ieee80211_run_deferred_scan(sdata->local);
1590}
1591
1592static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1593{
1594 mutex_lock(&sdata->local->mtx);
1595 __ieee80211_stop_poll(sdata);
1596 mutex_unlock(&sdata->local->mtx);
1597}
1598
7a5158ef
JB		 1599static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1600 u16 capab, bool erp_valid, u8 erp)
5628221c 1601{
bda3933a 1602 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 1603 u32 changed = 0;
7a5158ef
JB		 1604 bool use_protection;
1605 bool use_short_preamble;
1606 bool use_short_slot;
1607
1608 if (erp_valid) {
1609 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1610 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1611 } else {
1612 use_protection = false;
1613 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1614 }
1615
1616 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
55de908a 1617 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
43d35343 1618 use_short_slot = true;
5628221c 1619
471b3efd 1620 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 1621 bss_conf->use_cts_prot = use_protection;
1622 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 1623 }
7e9ed188 1624
d43c7b37 1625 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 1626 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 1627 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 1628 }
d9430a32 1629
7a5158ef 1630 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 1631 bss_conf->use_short_slot = use_short_slot;
1632 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 1633 }
1634
1635 return changed;
1636}
1637
f698d856 1638static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 1639 struct cfg80211_bss *cbss,
ae5eb026 1640 u32 bss_info_changed)
f0706e82 1641{
0c1ad2ca 1642 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 1643 struct ieee80211_local *local = sdata->local;
68542962 1644 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
d6f2da5b 1645
ae5eb026 1646 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 1647 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
50ae34a2 1648 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 1649
7ccc8bd7 1650 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
59c1ec2b 1651 beacon_loss_count * bss_conf->beacon_int));
7ccc8bd7 1652
0c1ad2ca
JB		 1653 sdata->u.mgd.associated = cbss;
1654 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 1655
17e4ec14
JM		 1656 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1657
488dd7b5 1658 if (sdata->vif.p2p) {
9caf0364 1659 const struct cfg80211_bss_ies *ies;
488dd7b5 1660
9caf0364
JB		 1661 rcu_read_lock();
1662 ies = rcu_dereference(cbss->ies);
1663 if (ies) {
934457ee 1664 struct ieee80211_p2p_noa_attr noa;
9caf0364
JB		 1665 int ret;
1666
1667 ret = cfg80211_get_p2p_attr(
1668 ies->data, ies->len,
1669 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
934457ee 1670 (u8 *) &noa, sizeof(noa));
9caf0364 1671 if (ret >= 2) {
934457ee
JD		 1672 bss_conf->p2p_oppps = noa.oppps_ctwindow &
1673 IEEE80211_P2P_OPPPS_ENABLE_BIT;
1674 bss_conf->p2p_ctwindow = noa.oppps_ctwindow &
1675 IEEE80211_P2P_OPPPS_CTWINDOW_MASK;
9caf0364 1676 bss_info_changed |= BSS_CHANGED_P2P_PS;
934457ee 1677 sdata->u.mgd.p2p_noa_index = noa.index;
9caf0364 1678 }
488dd7b5 1679 }
9caf0364 1680 rcu_read_unlock();
488dd7b5
JB		 1681 }
1682
b291ba11 1683 /* just to be sure */
925e64c3 1684 ieee80211_stop_poll(sdata);
b291ba11 1685
9ac19a90 1686 ieee80211_led_assoc(local, 1);
9306102e 1687
c65dd147 1688 if (sdata->u.mgd.assoc_data->have_beacon) {
826262c3
JB		 1689 /*
1690 * If the AP is buggy we may get here with no DTIM period
1691 * known, so assume it's 1 which is the only safe assumption
1692 * in that case, although if the TIM IE is broken powersave
1693 * probably just won't work at all.
1694 */
1695 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
c65dd147 1696 bss_info_changed |= BSS_CHANGED_DTIM_PERIOD;
826262c3 1697 } else {
e5b900d2 1698 bss_conf->dtim_period = 0;
826262c3 1699 }
e5b900d2 1700
68542962 1701 bss_conf->assoc = 1;
9cef8737 1702
a97c13c3 1703 /* Tell the driver to monitor connection quality (if supported) */
ea086359 1704 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
68542962 1705 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 1706 bss_info_changed |= BSS_CHANGED_CQM;
1707
68542962 1708 /* Enable ARP filtering */
0f19b41e 1709 if (bss_conf->arp_addr_cnt)
68542962 1710 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
68542962 1711
ae5eb026 1712 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 1713
056508dc
JB		 1714 mutex_lock(&local->iflist_mtx);
1715 ieee80211_recalc_ps(local, -1);
1716 mutex_unlock(&local->iflist_mtx);
e0cb686f 1717
04ecd257 1718 ieee80211_recalc_smps(sdata);
ab095877
EP		 1719 ieee80211_recalc_ps_vif(sdata);
1720
8a5b33f5 1721 netif_tx_start_all_queues(sdata->dev);
9ac19a90 1722 netif_carrier_on(sdata->dev);
f0706e82
JB		 1723}
1724
e69e95db 1725static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
37ad3888
JB		 1726 u16 stype, u16 reason, bool tx,
1727 u8 *frame_buf)
aa458d17 1728{
46900298 1729 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17 1730 struct ieee80211_local *local = sdata->local;
3cc5240b 1731 u32 changed = 0;
aa458d17 1732
77fdaa12
JB		 1733 ASSERT_MGD_MTX(ifmgd);
1734
37ad3888
JB		 1735 if (WARN_ON_ONCE(tx && !frame_buf))
1736 return;
1737
b291ba11
JB		 1738 if (WARN_ON(!ifmgd->associated))
1739 return;
1740
79543d8e
DS		 1741 ieee80211_stop_poll(sdata);
1742
77fdaa12 1743 ifmgd->associated = NULL;
77fdaa12
JB		 1744
1745 /*
1746 * we need to commit the associated = NULL change because the
1747 * scan code uses that to determine whether this iface should
1748 * go to/wake up from powersave or not -- and could otherwise
1749 * wake the queues erroneously.
1750 */
1751 smp_mb();
1752
1753 /*
1754 * Thus, we can only afterwards stop the queues -- to account
1755 * for the case where another CPU is finishing a scan at this
1756 * time -- we don't want the scan code to enable queues.
1757 */
aa458d17 1758
8a5b33f5 1759 netif_tx_stop_all_queues(sdata->dev);
aa458d17
TW		 1760 netif_carrier_off(sdata->dev);
1761
88bc40e8
EP		 1762 /*
1763 * if we want to get out of ps before disassoc (why?) we have
1764 * to do it before sending disassoc, as otherwise the null-packet
1765 * won't be valid.
1766 */
1767 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1768 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1769 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1770 }
1771 local->ps_sdata = NULL;
1772
ab095877
EP		 1773 /* disable per-vif ps */
1774 ieee80211_recalc_ps_vif(sdata);
1775
f823981e
EP		 1776 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1777 if (tx)
39ecc01d 1778 ieee80211_flush_queues(local, sdata);
f823981e 1779
37ad3888
JB		 1780 /* deauthenticate/disassociate now */
1781 if (tx || frame_buf)
88a9e31c
EP		 1782 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
1783 reason, tx, frame_buf);
37ad3888
JB		 1784
1785 /* flush out frame */
1786 if (tx)
39ecc01d 1787 ieee80211_flush_queues(local, sdata);
37ad3888 1788
88a9e31c
EP		 1789 /* clear bssid only after building the needed mgmt frames */
1790 memset(ifmgd->bssid, 0, ETH_ALEN);
1791
37ad3888 1792 /* remove AP and TDLS peers */
051007d9 1793 sta_info_flush_defer(sdata);
37ad3888
JB		 1794
1795 /* finally reset all BSS / config parameters */
f5e5bf25
TW		 1796 changed |= ieee80211_reset_erp_info(sdata);
1797
f5e5bf25 1798 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 1799 changed |= BSS_CHANGED_ASSOC;
1800 sdata->vif.bss_conf.assoc = false;
f5e5bf25 1801
488dd7b5
JB		 1802 sdata->vif.bss_conf.p2p_ctwindow = 0;
1803 sdata->vif.bss_conf.p2p_oppps = false;
1804
dd5ecfea 1805 /* on the next assoc, re-program HT/VHT parameters */
ef96a842
BG		 1806 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1807 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
dd5ecfea
JB		 1808 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
1809 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
413ad50a 1810
1ea6f9c0 1811 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
a8302de9 1812
520eb820
KV		 1813 del_timer_sync(&local->dynamic_ps_timer);
1814 cancel_work_sync(&local->dynamic_ps_enable_work);
1815
68542962 1816 /* Disable ARP filtering */
0f19b41e 1817 if (sdata->vif.bss_conf.arp_addr_cnt)
68542962 1818 changed |= BSS_CHANGED_ARP_FILTER;
68542962 1819
3abead59
JB		 1820 sdata->vif.bss_conf.qos = false;
1821 changed |= BSS_CHANGED_QOS;
1822
0aaffa9b
JB		 1823 /* The BSSID (not really interesting) and HT changed */
1824 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 1825 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 1826
3abead59
JB		 1827 /* disassociated - set to defaults now */
1828 ieee80211_set_wmm_default(sdata, false);
1829
b9dcf712
JB		 1830 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1831 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1832 del_timer_sync(&sdata->u.mgd.timer);
1833 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2d9957cc 1834
826262c3
JB		 1835 sdata->vif.bss_conf.dtim_period = 0;
1836
028e8da0
JB		 1837 ifmgd->flags = 0;
1838 ieee80211_vif_release_channel(sdata);
aa458d17 1839}
f0706e82 1840
3cf335d5
KV		 1841void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1842 struct ieee80211_hdr *hdr)
1843{
1844 /*
1845 * We can postpone the mgd.timer whenever receiving unicast frames
1846 * from AP because we know that the connection is working both ways
1847 * at that time. But multicast frames (and hence also beacons) must
1848 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 1849 * data idle periods for sending the periodic probe request to the
1850 * AP we're connected to.
3cf335d5 1851 */
b291ba11
JB		 1852 if (is_multicast_ether_addr(hdr->addr1))
1853 return;
1854
be099e82 1855 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 1856}
f0706e82 1857
4e5ff376
FF		 1858static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1859{
1860 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
133d40f9 1861 struct ieee80211_local *local = sdata->local;
4e5ff376 1862
133d40f9 1863 mutex_lock(&local->mtx);
4e5ff376 1864 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
133d40f9
SG		 1865 IEEE80211_STA_CONNECTION_POLL))) {
1866 mutex_unlock(&local->mtx);
1867 return;
1868 }
4e5ff376 1869
925e64c3 1870 __ieee80211_stop_poll(sdata);
133d40f9
SG		 1871
1872 mutex_lock(&local->iflist_mtx);
1873 ieee80211_recalc_ps(local, -1);
1874 mutex_unlock(&local->iflist_mtx);
4e5ff376
FF		 1875
1876 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
133d40f9 1877 goto out;
4e5ff376
FF		 1878
1879 /*
1880 * We've received a probe response, but are not sure whether
1881 * we have or will be receiving any beacons or data, so let's
1882 * schedule the timers again, just in case.
1883 */
1884 ieee80211_sta_reset_beacon_monitor(sdata);
1885
1886 mod_timer(&ifmgd->conn_mon_timer,
1887 round_jiffies_up(jiffies +
1888 IEEE80211_CONNECTION_IDLE_TIME));
133d40f9 1889out:
133d40f9 1890 mutex_unlock(&local->mtx);
4e5ff376
FF		 1891}
1892
1893void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
04ac3c0e 1894 struct ieee80211_hdr *hdr, bool ack)
4e5ff376 1895{
75706d0e 1896 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF		 1897 return;
1898
4e5ff376
FF		 1899 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1900 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e 1901 if (ack)
cab1c7fd 1902 ieee80211_sta_reset_conn_monitor(sdata);
04ac3c0e
FF		 1903 else
1904 sdata->u.mgd.nullfunc_failed = true;
4e5ff376 1905 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
cab1c7fd 1906 return;
4e5ff376 1907 }
cab1c7fd
WD		 1908
1909 if (ack)
1910 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF		 1911}
1912
a43abf29
ML		 1913static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1914{
1915 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1916 const u8 *ssid;
f01a067d 1917 u8 *dst = ifmgd->associated->bssid;
180205bd 1918 u8 unicast_limit = max(1, max_probe_tries - 3);
f01a067d
LR		 1919
1920 /*
1921 * Try sending broadcast probe requests for the last three
1922 * probe requests after the first ones failed since some
1923 * buggy APs only support broadcast probe requests.
1924 */
1925 if (ifmgd->probe_send_count >= unicast_limit)
1926 dst = NULL;
a43abf29 1927
4e5ff376
FF		 1928 /*
1929 * When the hardware reports an accurate Tx ACK status, it's
1930 * better to send a nullfunc frame instead of a probe request,
1931 * as it will kick us off the AP quickly if we aren't associated
1932 * anymore. The timeout will be reset if the frame is ACKed by
1933 * the AP.
1934 */
992e68bf
SD		 1935 ifmgd->probe_send_count++;
1936
04ac3c0e
FF		 1937 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1938 ifmgd->nullfunc_failed = false;
4e5ff376 1939 ieee80211_send_nullfunc(sdata->local, sdata, 0);
04ac3c0e 1940 } else {
88c868c4
SG		 1941 int ssid_len;
1942
9caf0364 1943 rcu_read_lock();
4e5ff376 1944 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
88c868c4
SG		 1945 if (WARN_ON_ONCE(ssid == NULL))
1946 ssid_len = 0;
1947 else
1948 ssid_len = ssid[1];
1949
1950 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
1672c0e3 1951 0, (u32) -1, true, 0,
55de908a 1952 ifmgd->associated->channel, false);
9caf0364 1953 rcu_read_unlock();
4e5ff376 1954 }
a43abf29 1955
180205bd 1956 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
a43abf29 1957 run_again(ifmgd, ifmgd->probe_timeout);
f69b9c79 1958 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
39ecc01d 1959 ieee80211_flush_queues(sdata->local, sdata);
a43abf29
ML		 1960}
1961
b291ba11
JB		 1962static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1963 bool beacon)
04de8381 1964{
04de8381 1965 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 1966 bool already = false;
34bfc411 1967
9607e6b6 1968 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 1969 return;
1970
77fdaa12
JB		 1971 mutex_lock(&ifmgd->mtx);
1972
1973 if (!ifmgd->associated)
1974 goto out;
1975
133d40f9
SG		 1976 mutex_lock(&sdata->local->mtx);
1977
1978 if (sdata->local->tmp_channel || sdata->local->scanning) {
1979 mutex_unlock(&sdata->local->mtx);
1980 goto out;
1981 }
1982
e87cc472 1983 if (beacon)
bdcbd8e0 1984 mlme_dbg_ratelimited(sdata,
59c1ec2b
BG		 1985 "detected beacon loss from AP (missed %d beacons) - probing\n",
1986 beacon_loss_count);
bdcbd8e0 1987
6efb71b0
HS		 1988 ieee80211_cqm_rssi_notify(&sdata->vif,
1989 NL80211_CQM_RSSI_BEACON_LOSS_EVENT, GFP_KERNEL);
04de8381 1990
b291ba11
JB		 1991 /*
1992 * The driver/our work has already reported this event or the
1993 * connection monitoring has kicked in and we have already sent
1994 * a probe request. Or maybe the AP died and the driver keeps
1995 * reporting until we disassociate...
1996 *
1997 * In either case we have to ignore the current call to this
1998 * function (except for setting the correct probe reason bit)
1999 * because otherwise we would reset the timer every time and
2000 * never check whether we received a probe response!
2001 */
2002 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2003 IEEE80211_STA_CONNECTION_POLL))
2004 already = true;
2005
2006 if (beacon)
2007 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
2008 else
2009 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2010
133d40f9
SG		 2011 mutex_unlock(&sdata->local->mtx);
2012
b291ba11
JB		 2013 if (already)
2014 goto out;
2015
4e751843
JB		 2016 mutex_lock(&sdata->local->iflist_mtx);
2017 ieee80211_recalc_ps(sdata->local, -1);
2018 mutex_unlock(&sdata->local->iflist_mtx);
2019
a43abf29
ML		 2020 ifmgd->probe_send_count = 0;
2021 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12
JB		 2022 out:
2023 mutex_unlock(&ifmgd->mtx);
04de8381
KV		 2024}
2025
a619a4c0
JO		 2026struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2027 struct ieee80211_vif *vif)
2028{
2029 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2030 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d9b3b28b 2031 struct cfg80211_bss *cbss;
a619a4c0
JO		 2032 struct sk_buff *skb;
2033 const u8 *ssid;
88c868c4 2034 int ssid_len;
a619a4c0
JO		 2035
2036 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2037 return NULL;
2038
2039 ASSERT_MGD_MTX(ifmgd);
2040
d9b3b28b
EP		 2041 if (ifmgd->associated)
2042 cbss = ifmgd->associated;
2043 else if (ifmgd->auth_data)
2044 cbss = ifmgd->auth_data->bss;
2045 else if (ifmgd->assoc_data)
2046 cbss = ifmgd->assoc_data->bss;
2047 else
a619a4c0
JO		 2048 return NULL;
2049
9caf0364 2050 rcu_read_lock();
d9b3b28b 2051 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
88c868c4
SG		 2052 if (WARN_ON_ONCE(ssid == NULL))
2053 ssid_len = 0;
2054 else
2055 ssid_len = ssid[1];
2056
d9b3b28b 2057 skb = ieee80211_build_probe_req(sdata, cbss->bssid,
55de908a 2058 (u32) -1, cbss->channel,
6b77863b 2059 ssid + 2, ssid_len,
85a237fe 2060 NULL, 0, true);
9caf0364 2061 rcu_read_unlock();
a619a4c0
JO		 2062
2063 return skb;
2064}
2065EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2066
eef9e54c 2067static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
1e4dcd01
JO		 2068{
2069 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 2070 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
1e4dcd01
JO		 2071
2072 mutex_lock(&ifmgd->mtx);
2073 if (!ifmgd->associated) {
2074 mutex_unlock(&ifmgd->mtx);
2075 return;
2076 }
2077
37ad3888
JB		 2078 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2079 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
eef9e54c 2080 true, frame_buf);
882a7c69 2081 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
5b36ebd8 2082 ieee80211_wake_queues_by_reason(&sdata->local->hw,
445ea4e8 2083 IEEE80211_MAX_QUEUE_MAP,
5b36ebd8 2084 IEEE80211_QUEUE_STOP_REASON_CSA);
1e4dcd01 2085 mutex_unlock(&ifmgd->mtx);
7da7cc1d 2086
1e4dcd01
JO		 2087 /*
2088 * must be outside lock due to cfg80211,
2089 * but that's not a problem.
2090 */
6ae16775 2091 cfg80211_send_deauth(sdata->dev, frame_buf, IEEE80211_DEAUTH_FRAME_LEN);
1e4dcd01
JO		 2092}
2093
cc74c0c7 2094static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 2095{
2096 struct ieee80211_sub_if_data *sdata =
2097 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 2098 u.mgd.beacon_connection_loss_work);
a85e1d55
PS		 2099 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2100 struct sta_info *sta;
2101
2102 if (ifmgd->associated) {
30fa9047 2103 rcu_read_lock();
a85e1d55
PS		 2104 sta = sta_info_get(sdata, ifmgd->bssid);
2105 if (sta)
2106 sta->beacon_loss_count++;
30fa9047 2107 rcu_read_unlock();
a85e1d55 2108 }
b291ba11 2109
682bd38b 2110 if (ifmgd->connection_loss) {
882a7c69
JB		 2111 sdata_info(sdata, "Connection to AP %pM lost\n",
2112 ifmgd->bssid);
eef9e54c 2113 __ieee80211_disconnect(sdata);
882a7c69 2114 } else {
1e4dcd01 2115 ieee80211_mgd_probe_ap(sdata, true);
882a7c69
JB		 2116 }
2117}
2118
2119static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2120{
2121 struct ieee80211_sub_if_data *sdata =
2122 container_of(work, struct ieee80211_sub_if_data,
2123 u.mgd.csa_connection_drop_work);
2124
eef9e54c 2125 __ieee80211_disconnect(sdata);
b291ba11
JB		 2126}
2127
04de8381
KV		 2128void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2129{
2130 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 2131 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 2132
b5878a2d
JB		 2133 trace_api_beacon_loss(sdata);
2134
1e4dcd01 2135 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
682bd38b 2136 sdata->u.mgd.connection_loss = false;
1e4dcd01 2137 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 2138}
2139EXPORT_SYMBOL(ieee80211_beacon_loss);
2140
1e4dcd01
JO		 2141void ieee80211_connection_loss(struct ieee80211_vif *vif)
2142{
2143 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2144 struct ieee80211_hw *hw = &sdata->local->hw;
2145
b5878a2d
JB		 2146 trace_api_connection_loss(sdata);
2147
682bd38b 2148 sdata->u.mgd.connection_loss = true;
1e4dcd01
JO		 2149 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2150}
2151EXPORT_SYMBOL(ieee80211_connection_loss);
2152
2153
66e67e41
JB		 2154static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2155 bool assoc)
2156{
2157 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2158
2159 lockdep_assert_held(&sdata->u.mgd.mtx);
2160
66e67e41
JB		 2161 if (!assoc) {
2162 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2163
2164 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2165 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
028e8da0 2166 sdata->u.mgd.flags = 0;
55de908a 2167 ieee80211_vif_release_channel(sdata);
66e67e41
JB		 2168 }
2169
5b112d3d 2170 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
66e67e41
JB		 2171 kfree(auth_data);
2172 sdata->u.mgd.auth_data = NULL;
2173}
2174
2175static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2176 struct ieee80211_mgmt *mgmt, size_t len)
2177{
1672c0e3 2178 struct ieee80211_local *local = sdata->local;
66e67e41
JB		 2179 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2180 u8 *pos;
2181 struct ieee802_11_elems elems;
1672c0e3 2182 u32 tx_flags = 0;
66e67e41
JB		 2183
2184 pos = mgmt->u.auth.variable;
2185 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2186 if (!elems.challenge)
2187 return;
2188 auth_data->expected_transaction = 4;
a1845fc7 2189 drv_mgd_prepare_tx(sdata->local, sdata);
1672c0e3
JB		 2190 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2191 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2192 IEEE80211_TX_INTFL_MLME_CONN_TX;
700e8ea6 2193 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
66e67e41
JB		 2194 elems.challenge - 2, elems.challenge_len + 2,
2195 auth_data->bss->bssid, auth_data->bss->bssid,
2196 auth_data->key, auth_data->key_len,
1672c0e3 2197 auth_data->key_idx, tx_flags);
66e67e41
JB		 2198}
2199
2200static enum rx_mgmt_action __must_check
2201ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2202 struct ieee80211_mgmt *mgmt, size_t len)
2203{
2204 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2205 u8 bssid[ETH_ALEN];
2206 u16 auth_alg, auth_transaction, status_code;
2207 struct sta_info *sta;
2208
2209 lockdep_assert_held(&ifmgd->mtx);
2210
2211 if (len < 24 + 6)
2212 return RX_MGMT_NONE;
2213
2214 if (!ifmgd->auth_data || ifmgd->auth_data->done)
2215 return RX_MGMT_NONE;
2216
2217 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2218
b203ca39 2219 if (!ether_addr_equal(bssid, mgmt->bssid))
66e67e41
JB		 2220 return RX_MGMT_NONE;
2221
2222 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2223 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2224 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2225
2226 if (auth_alg != ifmgd->auth_data->algorithm ||
0f4126e8
JM		 2227 auth_transaction != ifmgd->auth_data->expected_transaction) {
2228 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2229 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2230 auth_transaction,
2231 ifmgd->auth_data->expected_transaction);
66e67e41 2232 return RX_MGMT_NONE;
0f4126e8 2233 }
66e67e41
JB		 2234
2235 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2236 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2237 mgmt->sa, status_code);
dac211ec
EP		 2238 ieee80211_destroy_auth_data(sdata, false);
2239 return RX_MGMT_CFG80211_RX_AUTH;
66e67e41
JB		 2240 }
2241
2242 switch (ifmgd->auth_data->algorithm) {
2243 case WLAN_AUTH_OPEN:
2244 case WLAN_AUTH_LEAP:
2245 case WLAN_AUTH_FT:
6b8ece3a 2246 case WLAN_AUTH_SAE:
66e67e41
JB		 2247 break;
2248 case WLAN_AUTH_SHARED_KEY:
2249 if (ifmgd->auth_data->expected_transaction != 4) {
2250 ieee80211_auth_challenge(sdata, mgmt, len);
2251 /* need another frame */
2252 return RX_MGMT_NONE;
2253 }
2254 break;
2255 default:
2256 WARN_ONCE(1, "invalid auth alg %d",
2257 ifmgd->auth_data->algorithm);
2258 return RX_MGMT_NONE;
2259 }
2260
bdcbd8e0 2261 sdata_info(sdata, "authenticated\n");
66e67e41
JB		 2262 ifmgd->auth_data->done = true;
2263 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
89afe614 2264 ifmgd->auth_data->timeout_started = true;
66e67e41
JB		 2265 run_again(ifmgd, ifmgd->auth_data->timeout);
2266
6b8ece3a
JM		 2267 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2268 ifmgd->auth_data->expected_transaction != 2) {
2269 /*
2270 * Report auth frame to user space for processing since another
2271 * round of Authentication frames is still needed.
2272 */
2273 return RX_MGMT_CFG80211_RX_AUTH;
2274 }
2275
66e67e41
JB		 2276 /* move station state to auth */
2277 mutex_lock(&sdata->local->sta_mtx);
2278 sta = sta_info_get(sdata, bssid);
2279 if (!sta) {
2280 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2281 goto out_err;
2282 }
2283 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
bdcbd8e0 2284 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
66e67e41
JB		 2285 goto out_err;
2286 }
2287 mutex_unlock(&sdata->local->sta_mtx);
2288
2289 return RX_MGMT_CFG80211_RX_AUTH;
2290 out_err:
2291 mutex_unlock(&sdata->local->sta_mtx);
2292 /* ignore frame -- wait for timeout */
2293 return RX_MGMT_NONE;
2294}
2295
2296
77fdaa12
JB		 2297static enum rx_mgmt_action __must_check
2298ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
77fdaa12 2299 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2300{
46900298 2301 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 2302 const u8 *bssid = NULL;
f0706e82
JB		 2303 u16 reason_code;
2304
66e67e41
JB		 2305 lockdep_assert_held(&ifmgd->mtx);
2306
f4ea83dd 2307 if (len < 24 + 2)
77fdaa12 2308 return RX_MGMT_NONE;
f0706e82 2309
66e67e41 2310 if (!ifmgd->associated ||
b203ca39 2311 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
66e67e41 2312 return RX_MGMT_NONE;
77fdaa12 2313
0c1ad2ca 2314 bssid = ifmgd->associated->bssid;
f0706e82
JB		 2315
2316 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2317
bdcbd8e0
JB		 2318 sdata_info(sdata, "deauthenticated from %pM (Reason: %u)\n",
2319 bssid, reason_code);
77fdaa12 2320
37ad3888
JB		 2321 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2322
77fdaa12 2323 return RX_MGMT_CFG80211_DEAUTH;
f0706e82
JB		 2324}
2325
2326
77fdaa12
JB		 2327static enum rx_mgmt_action __must_check
2328ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2329 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2330{
46900298 2331 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 2332 u16 reason_code;
2333
66e67e41 2334 lockdep_assert_held(&ifmgd->mtx);
77fdaa12 2335
66e67e41 2336 if (len < 24 + 2)
77fdaa12
JB		 2337 return RX_MGMT_NONE;
2338
66e67e41 2339 if (!ifmgd->associated ||
b203ca39 2340 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
77fdaa12 2341 return RX_MGMT_NONE;
f0706e82
JB		 2342
2343 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2344
bdcbd8e0
JB		 2345 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2346 mgmt->sa, reason_code);
f0706e82 2347
37ad3888
JB		 2348 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2349
77fdaa12 2350 return RX_MGMT_CFG80211_DISASSOC;
f0706e82
JB		 2351}
2352
c74d084f
CL		 2353static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2354 u8 *supp_rates, unsigned int supp_rates_len,
2355 u32 *rates, u32 *basic_rates,
2356 bool *have_higher_than_11mbit,
2357 int *min_rate, int *min_rate_index)
2358{
2359 int i, j;
2360
2361 for (i = 0; i < supp_rates_len; i++) {
2362 int rate = (supp_rates[i] & 0x7f) * 5;
2363 bool is_basic = !!(supp_rates[i] & 0x80);
2364
2365 if (rate > 110)
2366 *have_higher_than_11mbit = true;
2367
2368 /*
2369 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2370 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2371 *
2372 * Note: Even through the membership selector and the basic
2373 * rate flag share the same bit, they are not exactly
2374 * the same.
2375 */
2376 if (!!(supp_rates[i] & 0x80) &&
2377 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2378 continue;
2379
2380 for (j = 0; j < sband->n_bitrates; j++) {
2381 if (sband->bitrates[j].bitrate == rate) {
2382 *rates |= BIT(j);
2383 if (is_basic)
2384 *basic_rates |= BIT(j);
2385 if (rate < *min_rate) {
2386 *min_rate = rate;
2387 *min_rate_index = j;
2388 }
2389 break;
2390 }
2391 }
2392 }
2393}
f0706e82 2394
66e67e41
JB		 2395static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2396 bool assoc)
2397{
2398 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2399
2400 lockdep_assert_held(&sdata->u.mgd.mtx);
2401
66e67e41
JB		 2402 if (!assoc) {
2403 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2404
2405 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2406 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
028e8da0 2407 sdata->u.mgd.flags = 0;
55de908a 2408 ieee80211_vif_release_channel(sdata);
66e67e41
JB		 2409 }
2410
2411 kfree(assoc_data);
2412 sdata->u.mgd.assoc_data = NULL;
2413}
2414
2415static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2416 struct cfg80211_bss *cbss,
af6b6374 2417 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2418{
46900298 2419 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 2420 struct ieee80211_local *local = sdata->local;
8318d78a 2421 struct ieee80211_supported_band *sband;
f0706e82 2422 struct sta_info *sta;
af6b6374 2423 u8 *pos;
af6b6374 2424 u16 capab_info, aid;
f0706e82 2425 struct ieee802_11_elems elems;
bda3933a 2426 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
ae5eb026 2427 u32 changed = 0;
c74d084f 2428 int err;
f0706e82 2429
af6b6374 2430 /* AssocResp and ReassocResp have identical structure */
f0706e82 2431
f0706e82 2432 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 2433 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 2434
1dd84aa2 2435 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
bdcbd8e0
JB		 2436 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2437 aid);
1dd84aa2
JB		 2438 aid &= ~(BIT(15) | BIT(14));
2439
05cb9108
JB		 2440 ifmgd->broken_ap = false;
2441
2442 if (aid == 0 || aid > IEEE80211_MAX_AID) {
bdcbd8e0
JB		 2443 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2444 aid);
05cb9108
JB		 2445 aid = 0;
2446 ifmgd->broken_ap = true;
2447 }
2448
af6b6374
JB		 2449 pos = mgmt->u.assoc_resp.variable;
2450 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2451
f0706e82 2452 if (!elems.supp_rates) {
bdcbd8e0 2453 sdata_info(sdata, "no SuppRates element in AssocResp\n");
af6b6374 2454 return false;
f0706e82
JB		 2455 }
2456
46900298 2457 ifmgd->aid = aid;
f0706e82 2458
30eb1dc2
JB		 2459 /*
2460 * We previously checked these in the beacon/probe response, so
2461 * they should be present here. This is just a safety net.
2462 */
2463 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2464 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2465 sdata_info(sdata,
2466 "HT AP is missing WMM params or HT capability/operation in AssocResp\n");
2467 return false;
2468 }
2469
2470 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2471 (!elems.vht_cap_elem || !elems.vht_operation)) {
2472 sdata_info(sdata,
2473 "VHT AP is missing VHT capability/operation in AssocResp\n");
2474 return false;
2475 }
2476
2a33bee2
GE		 2477 mutex_lock(&sdata->local->sta_mtx);
2478 /*
2479 * station info was already allocated and inserted before
2480 * the association and should be available to us
2481 */
7852e361 2482 sta = sta_info_get(sdata, cbss->bssid);
2a33bee2
GE		 2483 if (WARN_ON(!sta)) {
2484 mutex_unlock(&sdata->local->sta_mtx);
af6b6374 2485 return false;
77fdaa12 2486 }
05e5e883 2487
55de908a 2488 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
f709fc69 2489
30eb1dc2 2490 /* Set up internal HT/VHT capabilities */
a8243b72 2491 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
ef96a842 2492 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
e1a0c6b3 2493 elems.ht_cap_elem, sta);
64f68e5d 2494
818255ea
MP		 2495 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2496 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
4a34215e 2497 elems.vht_cap_elem, sta);
818255ea 2498
30eb1dc2
JB		 2499 /*
2500 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
2501 * in their association response, so ignore that data for our own
2502 * configuration. If it changed since the last beacon, we'll get the
2503 * next beacon and update then.
2504 */
1128958d 2505
bee7f586
JB		 2506 /*
2507 * If an operating mode notification IE is present, override the
2508 * NSS calculation (that would be done in rate_control_rate_init())
2509 * and use the # of streams from that element.
2510 */
2511 if (elems.opmode_notif &&
2512 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
2513 u8 nss;
2514
2515 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
2516 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
2517 nss += 1;
2518 sta->sta.rx_nss = nss;
2519 }
2520
4b7679a5 2521 rate_control_rate_init(sta);
f0706e82 2522
46900298 2523 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
c2c98fde 2524 set_sta_flag(sta, WLAN_STA_MFP);
5394af4d 2525
ddf4ac53 2526 if (elems.wmm_param)
c2c98fde 2527 set_sta_flag(sta, WLAN_STA_WME);
ddf4ac53 2528
3e4d40fa 2529 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
c8987876
JB		 2530 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2531 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2532 if (err) {
bdcbd8e0
JB		 2533 sdata_info(sdata,
2534 "failed to move station %pM to desired state\n",
2535 sta->sta.addr);
c8987876
JB		 2536 WARN_ON(__sta_info_destroy(sta));
2537 mutex_unlock(&sdata->local->sta_mtx);
2538 return false;
2539 }
2540
7852e361 2541 mutex_unlock(&sdata->local->sta_mtx);
ddf4ac53 2542
f2176d72
JO		 2543 /*
2544 * Always handle WMM once after association regardless
2545 * of the first value the AP uses. Setting -1 here has
2546 * that effect because the AP values is an unsigned
2547 * 4-bit value.
2548 */
2549 ifmgd->wmm_last_param_set = -1;
2550
ddf4ac53 2551 if (elems.wmm_param)
4ced3f74 2552 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 2553 elems.wmm_param_len);
aa837e1d 2554 else
3abead59
JB		 2555 ieee80211_set_wmm_default(sdata, false);
2556 changed |= BSS_CHANGED_QOS;
f0706e82 2557
60f8b39c
JB		 2558 /* set AID and assoc capability,
2559 * ieee80211_set_associated() will tell the driver */
2560 bss_conf->aid = aid;
2561 bss_conf->assoc_capability = capab_info;
0c1ad2ca 2562 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 2563
d524215f
FF		 2564 /*
2565 * If we're using 4-addr mode, let the AP know that we're
2566 * doing so, so that it can create the STA VLAN on its side
2567 */
2568 if (ifmgd->use_4addr)
2569 ieee80211_send_4addr_nullfunc(local, sdata);
2570
15b7b062 2571 /*
b291ba11
JB		 2572 * Start timer to probe the connection to the AP now.
2573 * Also start the timer that will detect beacon loss.
15b7b062 2574 */
b291ba11 2575 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 2576 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 2577
af6b6374 2578 return true;
f0706e82
JB		 2579}
2580
66e67e41
JB		 2581static enum rx_mgmt_action __must_check
2582ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2583 struct ieee80211_mgmt *mgmt, size_t len,
2584 struct cfg80211_bss **bss)
2585{
2586 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2587 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2588 u16 capab_info, status_code, aid;
2589 struct ieee802_11_elems elems;
2590 u8 *pos;
2591 bool reassoc;
2592
2593 lockdep_assert_held(&ifmgd->mtx);
2594
2595 if (!assoc_data)
2596 return RX_MGMT_NONE;
b203ca39 2597 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
66e67e41
JB		 2598 return RX_MGMT_NONE;
2599
2600 /*
2601 * AssocResp and ReassocResp have identical structure, so process both
2602 * of them in this function.
2603 */
2604
2605 if (len < 24 + 6)
2606 return RX_MGMT_NONE;
2607
2608 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2609 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2610 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2611 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2612
bdcbd8e0
JB		 2613 sdata_info(sdata,
2614 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2615 reassoc ? "Rea" : "A", mgmt->sa,
2616 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
66e67e41
JB		 2617
2618 pos = mgmt->u.assoc_resp.variable;
2619 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2620
2621 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
2622 elems.timeout_int && elems.timeout_int_len == 5 &&
2623 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
2624 u32 tu, ms;
2625 tu = get_unaligned_le32(elems.timeout_int + 1);
2626 ms = tu * 1024 / 1000;
bdcbd8e0
JB		 2627 sdata_info(sdata,
2628 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2629 mgmt->sa, tu, ms);
66e67e41 2630 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
89afe614 2631 assoc_data->timeout_started = true;
66e67e41
JB		 2632 if (ms > IEEE80211_ASSOC_TIMEOUT)
2633 run_again(ifmgd, assoc_data->timeout);
2634 return RX_MGMT_NONE;
2635 }
2636
2637 *bss = assoc_data->bss;
2638
2639 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2640 sdata_info(sdata, "%pM denied association (code=%d)\n",
2641 mgmt->sa, status_code);
66e67e41
JB		 2642 ieee80211_destroy_assoc_data(sdata, false);
2643 } else {
66e67e41
JB		 2644 if (!ieee80211_assoc_success(sdata, *bss, mgmt, len)) {
2645 /* oops -- internal error -- send timeout for now */
10a9109f 2646 ieee80211_destroy_assoc_data(sdata, false);
5b112d3d 2647 cfg80211_put_bss(sdata->local->hw.wiphy, *bss);
66e67e41
JB		 2648 return RX_MGMT_CFG80211_ASSOC_TIMEOUT;
2649 }
635d999f 2650 sdata_info(sdata, "associated\n");
79ebfb85
JB		 2651
2652 /*
2653 * destroy assoc_data afterwards, as otherwise an idle
2654 * recalc after assoc_data is NULL but before associated
2655 * is set can cause the interface to go idle
2656 */
2657 ieee80211_destroy_assoc_data(sdata, true);
66e67e41
JB		 2658 }
2659
2660 return RX_MGMT_CFG80211_RX_ASSOC;
2661}
8e3c1b77 2662
98c8fccf 2663static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
8e3c1b77 2664 struct ieee80211_mgmt *mgmt, size_t len,
98c8fccf 2665 struct ieee80211_rx_status *rx_status,
d45c4172 2666 struct ieee802_11_elems *elems)
98c8fccf
JB		 2667{
2668 struct ieee80211_local *local = sdata->local;
2669 int freq;
c2b13452 2670 struct ieee80211_bss *bss;
98c8fccf 2671 struct ieee80211_channel *channel;
56007a02
JB		 2672 bool need_ps = false;
2673
826262c3
JB		 2674 if ((sdata->u.mgd.associated &&
2675 ether_addr_equal(mgmt->bssid, sdata->u.mgd.associated->bssid)) ||
2676 (sdata->u.mgd.assoc_data &&
2677 ether_addr_equal(mgmt->bssid,
2678 sdata->u.mgd.assoc_data->bss->bssid))) {
56007a02 2679 /* not previously set so we may need to recalc */
826262c3
JB		 2680 need_ps = sdata->u.mgd.associated && !sdata->u.mgd.dtim_period;
2681
2682 if (elems->tim && !elems->parse_error) {
4a3cb702 2683 const struct ieee80211_tim_ie *tim_ie = elems->tim;
826262c3
JB		 2684 sdata->u.mgd.dtim_period = tim_ie->dtim_period;
2685 }
56007a02 2686 }
98c8fccf
JB		 2687
2688 if (elems->ds_params && elems->ds_params_len == 1)
59eb21a6
BR		 2689 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
2690 rx_status->band);
98c8fccf
JB		 2691 else
2692 freq = rx_status->freq;
2693
2694 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2695
2696 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2697 return;
2698
98c8fccf 2699 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
d45c4172 2700 channel);
77fdaa12
JB		 2701 if (bss)
2702 ieee80211_rx_bss_put(local, bss);
2703
2704 if (!sdata->u.mgd.associated)
98c8fccf
JB		 2705 return;
2706
56007a02
JB		 2707 if (need_ps) {
2708 mutex_lock(&local->iflist_mtx);
2709 ieee80211_recalc_ps(local, -1);
2710 mutex_unlock(&local->iflist_mtx);
2711 }
2712
5bc1420b
JB		 2713 if (elems->ch_switch_ie &&
2714 memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid, ETH_ALEN) == 0)
2715 ieee80211_sta_process_chanswitch(sdata, elems->ch_switch_ie,
5ce6e438 2716 bss, rx_status->mactime);
f0706e82
JB		 2717}
2718
2719
f698d856 2720static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 2721 struct sk_buff *skb)
f0706e82 2722{
af6b6374 2723 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 2724 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 2725 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2726 size_t baselen, len = skb->len;
ae6a44e3
EK		 2727 struct ieee802_11_elems elems;
2728
15b7b062
KV		 2729 ifmgd = &sdata->u.mgd;
2730
77fdaa12
JB		 2731 ASSERT_MGD_MTX(ifmgd);
2732
b203ca39 2733 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
8e7cdbb6
TW		 2734 return; /* ignore ProbeResp to foreign address */
2735
ae6a44e3
EK		 2736 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2737 if (baselen > len)
2738 return;
2739
2740 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2741 &elems);
2742
d45c4172 2743 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
9859b81e 2744
77fdaa12 2745 if (ifmgd->associated &&
b203ca39 2746 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
4e5ff376 2747 ieee80211_reset_ap_probe(sdata);
66e67e41
JB		 2748
2749 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
b203ca39 2750 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
66e67e41 2751 /* got probe response, continue with auth */
bdcbd8e0 2752 sdata_info(sdata, "direct probe responded\n");
66e67e41
JB		 2753 ifmgd->auth_data->tries = 0;
2754 ifmgd->auth_data->timeout = jiffies;
89afe614 2755 ifmgd->auth_data->timeout_started = true;
66e67e41
JB		 2756 run_again(ifmgd, ifmgd->auth_data->timeout);
2757 }
f0706e82
JB		 2758}
2759
d91f36db
JB		 2760/*
2761 * This is the canonical list of information elements we care about,
2762 * the filter code also gives us all changes to the Microsoft OUI
2763 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2764 *
2765 * We implement beacon filtering in software since that means we can
2766 * avoid processing the frame here and in cfg80211, and userspace
2767 * will not be able to tell whether the hardware supports it or not.
2768 *
2769 * XXX: This list needs to be dynamic -- userspace needs to be able to
2770 * add items it requires. It also needs to be able to tell us to
2771 * look out for other vendor IEs.
2772 */
2773static const u64 care_about_ies =
1d4df3a5
JB		 2774 (1ULL << WLAN_EID_COUNTRY) |
2775 (1ULL << WLAN_EID_ERP_INFO) |
2776 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2777 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2778 (1ULL << WLAN_EID_HT_CAPABILITY) |
074d46d1 2779 (1ULL << WLAN_EID_HT_OPERATION);
d91f36db 2780
30eb1dc2
JB		 2781static enum rx_mgmt_action
2782ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
2783 struct ieee80211_mgmt *mgmt, size_t len,
2784 u8 *deauth_buf, struct ieee80211_rx_status *rx_status)
f0706e82 2785{
d91f36db 2786 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 2787 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 2788 size_t baselen;
2789 struct ieee802_11_elems elems;
f698d856 2790 struct ieee80211_local *local = sdata->local;
55de908a
JB		 2791 struct ieee80211_chanctx_conf *chanctx_conf;
2792 struct ieee80211_channel *chan;
bee7f586 2793 struct sta_info *sta;
471b3efd 2794 u32 changed = 0;
f87ad637 2795 bool erp_valid;
7a5158ef 2796 u8 erp_value = 0;
d91f36db 2797 u32 ncrc;
77fdaa12
JB		 2798 u8 *bssid;
2799
66e67e41 2800 lockdep_assert_held(&ifmgd->mtx);
f0706e82 2801
ae6a44e3
EK		 2802 /* Process beacon from the current BSS */
2803 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2804 if (baselen > len)
30eb1dc2 2805 return RX_MGMT_NONE;
ae6a44e3 2806
55de908a
JB		 2807 rcu_read_lock();
2808 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2809 if (!chanctx_conf) {
2810 rcu_read_unlock();
30eb1dc2 2811 return RX_MGMT_NONE;
55de908a
JB		 2812 }
2813
4bf88530 2814 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
55de908a 2815 rcu_read_unlock();
30eb1dc2 2816 return RX_MGMT_NONE;
55de908a 2817 }
4bf88530 2818 chan = chanctx_conf->def.chan;
55de908a 2819 rcu_read_unlock();
f0706e82 2820
c65dd147 2821 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
b203ca39 2822 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
66e67e41
JB		 2823 ieee802_11_parse_elems(mgmt->u.beacon.variable,
2824 len - baselen, &elems);
77fdaa12 2825
d45c4172 2826 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
66e67e41 2827 ifmgd->assoc_data->have_beacon = true;
c65dd147 2828 ifmgd->assoc_data->need_beacon = false;
ef429dad
JB		 2829 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
2830 sdata->vif.bss_conf.sync_tsf =
2831 le64_to_cpu(mgmt->u.beacon.timestamp);
2832 sdata->vif.bss_conf.sync_device_ts =
2833 rx_status->device_timestamp;
2834 if (elems.tim)
2835 sdata->vif.bss_conf.sync_dtim_count =
2836 elems.tim->dtim_count;
2837 else
2838 sdata->vif.bss_conf.sync_dtim_count = 0;
2839 }
66e67e41
JB		 2840 /* continue assoc process */
2841 ifmgd->assoc_data->timeout = jiffies;
89afe614 2842 ifmgd->assoc_data->timeout_started = true;
66e67e41 2843 run_again(ifmgd, ifmgd->assoc_data->timeout);
30eb1dc2 2844 return RX_MGMT_NONE;
66e67e41 2845 }
77fdaa12 2846
66e67e41 2847 if (!ifmgd->associated ||
b203ca39 2848 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
30eb1dc2 2849 return RX_MGMT_NONE;
66e67e41 2850 bssid = ifmgd->associated->bssid;
f0706e82 2851
17e4ec14
JM		 2852 /* Track average RSSI from the Beacon frames of the current AP */
2853 ifmgd->last_beacon_signal = rx_status->signal;
2854 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
2855 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3ba06c6f 2856 ifmgd->ave_beacon_signal = rx_status->signal * 16;
17e4ec14 2857 ifmgd->last_cqm_event_signal = 0;
391a200a 2858 ifmgd->count_beacon_signal = 1;
615f7b9b 2859 ifmgd->last_ave_beacon_signal = 0;
17e4ec14
JM		 2860 } else {
2861 ifmgd->ave_beacon_signal =
2862 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
2863 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
2864 ifmgd->ave_beacon_signal) / 16;
391a200a 2865 ifmgd->count_beacon_signal++;
17e4ec14 2866 }
615f7b9b
MV		 2867
2868 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
2869 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
2870 int sig = ifmgd->ave_beacon_signal;
2871 int last_sig = ifmgd->last_ave_beacon_signal;
2872
2873 /*
2874 * if signal crosses either of the boundaries, invoke callback
2875 * with appropriate parameters
2876 */
2877 if (sig > ifmgd->rssi_max_thold &&
2878 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
2879 ifmgd->last_ave_beacon_signal = sig;
887da917 2880 drv_rssi_callback(local, sdata, RSSI_EVENT_HIGH);
615f7b9b
MV		 2881 } else if (sig < ifmgd->rssi_min_thold &&
2882 (last_sig >= ifmgd->rssi_max_thold ||
2883 last_sig == 0)) {
2884 ifmgd->last_ave_beacon_signal = sig;
887da917 2885 drv_rssi_callback(local, sdata, RSSI_EVENT_LOW);
615f7b9b
MV		 2886 }
2887 }
2888
17e4ec14 2889 if (bss_conf->cqm_rssi_thold &&
391a200a 2890 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
ea086359 2891 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
17e4ec14
JM		 2892 int sig = ifmgd->ave_beacon_signal / 16;
2893 int last_event = ifmgd->last_cqm_event_signal;
2894 int thold = bss_conf->cqm_rssi_thold;
2895 int hyst = bss_conf->cqm_rssi_hyst;
2896 if (sig < thold &&
2897 (last_event == 0 || sig < last_event - hyst)) {
2898 ifmgd->last_cqm_event_signal = sig;
2899 ieee80211_cqm_rssi_notify(
2900 &sdata->vif,
2901 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
2902 GFP_KERNEL);
2903 } else if (sig > thold &&
2904 (last_event == 0 || sig > last_event + hyst)) {
2905 ifmgd->last_cqm_event_signal = sig;
2906 ieee80211_cqm_rssi_notify(
2907 &sdata->vif,
2908 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
2909 GFP_KERNEL);
2910 }
2911 }
2912
b291ba11 2913 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
bdcbd8e0 2914 mlme_dbg_ratelimited(sdata,
112c31f0 2915 "cancelling AP probe due to a received beacon\n");
925e64c3 2916 mutex_lock(&local->mtx);
b291ba11 2917 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
925e64c3
SG		 2918 ieee80211_run_deferred_scan(local);
2919 mutex_unlock(&local->mtx);
2920
4e751843
JB		 2921 mutex_lock(&local->iflist_mtx);
2922 ieee80211_recalc_ps(local, -1);
2923 mutex_unlock(&local->iflist_mtx);
92778180
JM		 2924 }
2925
b291ba11
JB		 2926 /*
2927 * Push the beacon loss detection into the future since
2928 * we are processing a beacon from the AP just now.
2929 */
d3a910a8 2930 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 2931
d91f36db
JB		 2932 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
2933 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
2934 len - baselen, &elems,
2935 care_about_ies, ncrc);
2936
25c9c875 2937 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
f87ad637
RR		 2938 bool directed_tim = ieee80211_check_tim(elems.tim,
2939 elems.tim_len,
2940 ifmgd->aid);
1fb3606b 2941 if (directed_tim) {
572e0012 2942 if (local->hw.conf.dynamic_ps_timeout > 0) {
70b12f26
RW		 2943 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2944 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2945 ieee80211_hw_config(local,
2946 IEEE80211_CONF_CHANGE_PS);
2947 }
572e0012 2948 ieee80211_send_nullfunc(local, sdata, 0);
6f0756a3 2949 } else if (!local->pspolling && sdata->u.mgd.powersave) {
572e0012
KV		 2950 local->pspolling = true;
2951
2952 /*
2953 * Here is assumed that the driver will be
2954 * able to send ps-poll frame and receive a
2955 * response even though power save mode is
2956 * enabled, but some drivers might require
2957 * to disable power save here. This needs
2958 * to be investigated.
2959 */
2960 ieee80211_send_pspoll(local, sdata);
2961 }
a97b77b9
VN		 2962 }
2963 }
7a5158ef 2964
488dd7b5 2965 if (sdata->vif.p2p) {
934457ee 2966 struct ieee80211_p2p_noa_attr noa;
488dd7b5
JB		 2967 int ret;
2968
2969 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
2970 len - baselen,
2971 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
934457ee
JD		 2972 (u8 *) &noa, sizeof(noa));
2973 if (ret >= 2 && sdata->u.mgd.p2p_noa_index != noa.index) {
2974 bss_conf->p2p_oppps = noa.oppps_ctwindow &
2975 IEEE80211_P2P_OPPPS_ENABLE_BIT;
2976 bss_conf->p2p_ctwindow = noa.oppps_ctwindow &
2977 IEEE80211_P2P_OPPPS_CTWINDOW_MASK;
488dd7b5 2978 changed |= BSS_CHANGED_P2P_PS;
934457ee 2979 sdata->u.mgd.p2p_noa_index = noa.index;
488dd7b5
JB		 2980 /*
2981 * make sure we update all information, the CRC
2982 * mechanism doesn't look at P2P attributes.
2983 */
2984 ifmgd->beacon_crc_valid = false;
2985 }
2986 }
2987
d8ec4433 2988 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
30eb1dc2 2989 return RX_MGMT_NONE;
30196673 2990 ifmgd->beacon_crc = ncrc;
d8ec4433 2991 ifmgd->beacon_crc_valid = true;
30196673 2992
d45c4172 2993 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
7d25745d
JB		 2994
2995 if (ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2996 elems.wmm_param_len))
2997 changed |= BSS_CHANGED_QOS;
2998
c65dd147
EG		 2999 /*
3000 * If we haven't had a beacon before, tell the driver about the
ef429dad 3001 * DTIM period (and beacon timing if desired) now.
c65dd147
EG		 3002 */
3003 if (!bss_conf->dtim_period) {
3004 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3005 if (elems.tim)
3006 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3007 else
3008 bss_conf->dtim_period = 1;
ef429dad
JB		 3009
3010 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3011 sdata->vif.bss_conf.sync_tsf =
3012 le64_to_cpu(mgmt->u.beacon.timestamp);
3013 sdata->vif.bss_conf.sync_device_ts =
3014 rx_status->device_timestamp;
3015 if (elems.tim)
3016 sdata->vif.bss_conf.sync_dtim_count =
3017 elems.tim->dtim_count;
3018 else
3019 sdata->vif.bss_conf.sync_dtim_count = 0;
3020 }
3021
c65dd147
EG		 3022 changed |= BSS_CHANGED_DTIM_PERIOD;
3023 }
3024
7a5158ef
JB		 3025 if (elems.erp_info && elems.erp_info_len >= 1) {
3026 erp_valid = true;
3027 erp_value = elems.erp_info[0];
3028 } else {
3029 erp_valid = false;
50c4afb9 3030 }
7a5158ef
JB		 3031 changed |= ieee80211_handle_bss_capability(sdata,
3032 le16_to_cpu(mgmt->u.beacon.capab_info),
3033 erp_valid, erp_value);
f0706e82 3034
1128958d 3035 mutex_lock(&local->sta_mtx);
bee7f586
JB		 3036 sta = sta_info_get(sdata, bssid);
3037
30eb1dc2
JB		 3038 if (ieee80211_config_bw(sdata, sta, elems.ht_operation,
3039 elems.vht_operation, bssid, &changed)) {
3040 mutex_unlock(&local->sta_mtx);
3041 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3042 WLAN_REASON_DEAUTH_LEAVING,
3043 true, deauth_buf);
3044 return RX_MGMT_CFG80211_TX_DEAUTH;
3045 }
bee7f586
JB		 3046
3047 if (sta && elems.opmode_notif)
3048 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3049 rx_status->band, true);
1128958d 3050 mutex_unlock(&local->sta_mtx);
d3c990fb 3051
04b7b2ff
JB		 3052 if (elems.country_elem && elems.pwr_constr_elem &&
3053 mgmt->u.probe_resp.capab_info &
3054 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT))
1ea6f9c0
JB		 3055 changed |= ieee80211_handle_pwr_constr(sdata, chan,
3056 elems.country_elem,
3057 elems.country_elem_len,
3058 elems.pwr_constr_elem);
3f2355cb 3059
471b3efd 3060 ieee80211_bss_info_change_notify(sdata, changed);
30eb1dc2
JB		 3061
3062 return RX_MGMT_NONE;
f0706e82
JB		 3063}
3064
1fa57d01
JB		 3065void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3066 struct sk_buff *skb)
f0706e82 3067{
77fdaa12 3068 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 3069 struct ieee80211_rx_status *rx_status;
f0706e82 3070 struct ieee80211_mgmt *mgmt;
66e67e41 3071 struct cfg80211_bss *bss = NULL;
77fdaa12 3072 enum rx_mgmt_action rma = RX_MGMT_NONE;
30eb1dc2 3073 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
f0706e82
JB		 3074 u16 fc;
3075
f0706e82
JB		 3076 rx_status = (struct ieee80211_rx_status *) skb->cb;
3077 mgmt = (struct ieee80211_mgmt *) skb->data;
3078 fc = le16_to_cpu(mgmt->frame_control);
3079
77fdaa12
JB		 3080 mutex_lock(&ifmgd->mtx);
3081
66e67e41
JB		 3082 switch (fc & IEEE80211_FCTL_STYPE) {
3083 case IEEE80211_STYPE_BEACON:
30eb1dc2
JB		 3084 rma = ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
3085 deauth_buf, rx_status);
66e67e41
JB		 3086 break;
3087 case IEEE80211_STYPE_PROBE_RESP:
3088 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3089 break;
3090 case IEEE80211_STYPE_AUTH:
3091 rma = ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3092 break;
3093 case IEEE80211_STYPE_DEAUTH:
3094 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3095 break;
3096 case IEEE80211_STYPE_DISASSOC:
3097 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3098 break;
3099 case IEEE80211_STYPE_ASSOC_RESP:
3100 case IEEE80211_STYPE_REASSOC_RESP:
3101 rma = ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, &bss);
3102 break;
3103 case IEEE80211_STYPE_ACTION:
3104 switch (mgmt->u.action.category) {
3105 case WLAN_CATEGORY_SPECTRUM_MGMT:
3106 ieee80211_sta_process_chanswitch(sdata,
3107 &mgmt->u.action.u.chan_switch.sw_elem,
3108 (void *)ifmgd->associated->priv,
3109 rx_status->mactime);
77fdaa12 3110 break;
77fdaa12 3111 }
77fdaa12 3112 }
77fdaa12
JB		 3113 mutex_unlock(&ifmgd->mtx);
3114
66e67e41
JB		 3115 switch (rma) {
3116 case RX_MGMT_NONE:
3117 /* no action */
3118 break;
3119 case RX_MGMT_CFG80211_DEAUTH:
ce470613 3120 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
66e67e41
JB		 3121 break;
3122 case RX_MGMT_CFG80211_DISASSOC:
3123 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
3124 break;
3125 case RX_MGMT_CFG80211_RX_AUTH:
3126 cfg80211_send_rx_auth(sdata->dev, (u8 *)mgmt, skb->len);
3127 break;
3128 case RX_MGMT_CFG80211_RX_ASSOC:
3129 cfg80211_send_rx_assoc(sdata->dev, bss, (u8 *)mgmt, skb->len);
3130 break;
3131 case RX_MGMT_CFG80211_ASSOC_TIMEOUT:
3132 cfg80211_send_assoc_timeout(sdata->dev, mgmt->bssid);
3133 break;
30eb1dc2
JB		 3134 case RX_MGMT_CFG80211_TX_DEAUTH:
3135 cfg80211_send_deauth(sdata->dev, deauth_buf,
3136 sizeof(deauth_buf));
3137 break;
66e67e41
JB		 3138 default:
3139 WARN(1, "unexpected: %d", rma);
b054b747 3140 }
f0706e82
JB		 3141}
3142
9c6bd790 3143static void ieee80211_sta_timer(unsigned long data)
f0706e82 3144{
60f8b39c
JB		 3145 struct ieee80211_sub_if_data *sdata =
3146 (struct ieee80211_sub_if_data *) data;
5bb644a0 3147
9b7d72c1 3148 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
f0706e82
JB		 3149}
3150
04ac3c0e 3151static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
6b684db1 3152 u8 *bssid, u8 reason, bool tx)
04ac3c0e 3153{
04ac3c0e 3154 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 3155 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
04ac3c0e 3156
37ad3888 3157 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
6b684db1 3158 tx, frame_buf);
04ac3c0e 3159 mutex_unlock(&ifmgd->mtx);
37ad3888 3160
04ac3c0e
FF		 3161 /*
3162 * must be outside lock due to cfg80211,
3163 * but that's not a problem.
3164 */
6ae16775 3165 cfg80211_send_deauth(sdata->dev, frame_buf, IEEE80211_DEAUTH_FRAME_LEN);
fcac4fb0 3166
04ac3c0e
FF		 3167 mutex_lock(&ifmgd->mtx);
3168}
3169
66e67e41
JB		 3170static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
3171{
3172 struct ieee80211_local *local = sdata->local;
3173 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3174 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
1672c0e3 3175 u32 tx_flags = 0;
66e67e41
JB		 3176
3177 lockdep_assert_held(&ifmgd->mtx);
3178
3179 if (WARN_ON_ONCE(!auth_data))
3180 return -EINVAL;
3181
1672c0e3
JB		 3182 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3183 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3184 IEEE80211_TX_INTFL_MLME_CONN_TX;
3185
66e67e41
JB		 3186 auth_data->tries++;
3187
3188 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
bdcbd8e0
JB		 3189 sdata_info(sdata, "authentication with %pM timed out\n",
3190 auth_data->bss->bssid);
66e67e41
JB		 3191
3192 /*
3193 * Most likely AP is not in the range so remove the
3194 * bss struct for that AP.
3195 */
3196 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3197
3198 return -ETIMEDOUT;
3199 }
3200
a1845fc7
JB		 3201 drv_mgd_prepare_tx(local, sdata);
3202
66e67e41 3203 if (auth_data->bss->proberesp_ies) {
6b8ece3a
JM		 3204 u16 trans = 1;
3205 u16 status = 0;
3206
bdcbd8e0
JB		 3207 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3208 auth_data->bss->bssid, auth_data->tries,
3209 IEEE80211_AUTH_MAX_TRIES);
66e67e41
JB		 3210
3211 auth_data->expected_transaction = 2;
6b8ece3a
JM		 3212
3213 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3214 trans = auth_data->sae_trans;
3215 status = auth_data->sae_status;
3216 auth_data->expected_transaction = trans;
3217 }
3218
3219 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3220 auth_data->data, auth_data->data_len,
66e67e41 3221 auth_data->bss->bssid,
1672c0e3
JB		 3222 auth_data->bss->bssid, NULL, 0, 0,
3223 tx_flags);
66e67e41
JB		 3224 } else {
3225 const u8 *ssidie;
3226
bdcbd8e0
JB		 3227 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
3228 auth_data->bss->bssid, auth_data->tries,
3229 IEEE80211_AUTH_MAX_TRIES);
66e67e41 3230
9caf0364 3231 rcu_read_lock();
66e67e41 3232 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
9caf0364
JB		 3233 if (!ssidie) {
3234 rcu_read_unlock();
66e67e41 3235 return -EINVAL;
9caf0364 3236 }
66e67e41
JB		 3237 /*
3238 * Direct probe is sent to broadcast address as some APs
3239 * will not answer to direct packet in unassociated state.
3240 */
3241 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
1672c0e3 3242 NULL, 0, (u32) -1, true, tx_flags,
55de908a 3243 auth_data->bss->channel, false);
9caf0364 3244 rcu_read_unlock();
66e67e41
JB		 3245 }
3246
1672c0e3
JB		 3247 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
3248 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
89afe614 3249 ifmgd->auth_data->timeout_started = true;
1672c0e3 3250 run_again(ifmgd, auth_data->timeout);
89afe614
JB		 3251 } else {
3252 auth_data->timeout_started = false;
1672c0e3 3253 }
66e67e41
JB		 3254
3255 return 0;
3256}
3257
3258static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3259{
3260 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3261 struct ieee80211_local *local = sdata->local;
3262
3263 lockdep_assert_held(&sdata->u.mgd.mtx);
3264
66e67e41
JB		 3265 assoc_data->tries++;
3266 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
bdcbd8e0
JB		 3267 sdata_info(sdata, "association with %pM timed out\n",
3268 assoc_data->bss->bssid);
66e67e41
JB		 3269
3270 /*
3271 * Most likely AP is not in the range so remove the
3272 * bss struct for that AP.
3273 */
3274 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3275
3276 return -ETIMEDOUT;
3277 }
3278
bdcbd8e0
JB		 3279 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3280 assoc_data->bss->bssid, assoc_data->tries,
3281 IEEE80211_ASSOC_MAX_TRIES);
66e67e41
JB		 3282 ieee80211_send_assoc(sdata);
3283
1672c0e3
JB		 3284 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
3285 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
89afe614 3286 assoc_data->timeout_started = true;
1672c0e3 3287 run_again(&sdata->u.mgd, assoc_data->timeout);
89afe614
JB		 3288 } else {
3289 assoc_data->timeout_started = false;
1672c0e3 3290 }
66e67e41
JB		 3291
3292 return 0;
3293}
3294
1672c0e3
JB		 3295void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3296 __le16 fc, bool acked)
3297{
3298 struct ieee80211_local *local = sdata->local;
3299
3300 sdata->u.mgd.status_fc = fc;
3301 sdata->u.mgd.status_acked = acked;
3302 sdata->u.mgd.status_received = true;
3303
3304 ieee80211_queue_work(&local->hw, &sdata->work);
3305}
3306
1fa57d01 3307void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 3308{
9c6bd790 3309 struct ieee80211_local *local = sdata->local;
1fa57d01 3310 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 3311
77fdaa12
JB		 3312 mutex_lock(&ifmgd->mtx);
3313
1672c0e3
JB		 3314 if (ifmgd->status_received) {
3315 __le16 fc = ifmgd->status_fc;
3316 bool status_acked = ifmgd->status_acked;
3317
3318 ifmgd->status_received = false;
3319 if (ifmgd->auth_data &&
3320 (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) {
3321 if (status_acked) {
3322 ifmgd->auth_data->timeout =
3323 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3324 run_again(ifmgd, ifmgd->auth_data->timeout);
3325 } else {
3326 ifmgd->auth_data->timeout = jiffies - 1;
3327 }
89afe614 3328 ifmgd->auth_data->timeout_started = true;
1672c0e3
JB		 3329 } else if (ifmgd->assoc_data &&
3330 (ieee80211_is_assoc_req(fc) ||
3331 ieee80211_is_reassoc_req(fc))) {
3332 if (status_acked) {
3333 ifmgd->assoc_data->timeout =
3334 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3335 run_again(ifmgd, ifmgd->assoc_data->timeout);
3336 } else {
3337 ifmgd->assoc_data->timeout = jiffies - 1;
3338 }
89afe614 3339 ifmgd->assoc_data->timeout_started = true;
1672c0e3
JB		 3340 }
3341 }
3342
89afe614 3343 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
66e67e41
JB		 3344 time_after(jiffies, ifmgd->auth_data->timeout)) {
3345 if (ifmgd->auth_data->done) {
3346 /*
3347 * ok ... we waited for assoc but userspace didn't,
3348 * so let's just kill the auth data
3349 */
3350 ieee80211_destroy_auth_data(sdata, false);
3351 } else if (ieee80211_probe_auth(sdata)) {
3352 u8 bssid[ETH_ALEN];
3353
3354 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3355
3356 ieee80211_destroy_auth_data(sdata, false);
3357
3358 mutex_unlock(&ifmgd->mtx);
3359 cfg80211_send_auth_timeout(sdata->dev, bssid);
3360 mutex_lock(&ifmgd->mtx);
3361 }
89afe614 3362 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
66e67e41
JB		 3363 run_again(ifmgd, ifmgd->auth_data->timeout);
3364
89afe614 3365 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
66e67e41 3366 time_after(jiffies, ifmgd->assoc_data->timeout)) {
c65dd147
EG		 3367 if ((ifmgd->assoc_data->need_beacon &&
3368 !ifmgd->assoc_data->have_beacon) ||
66e67e41
JB		 3369 ieee80211_do_assoc(sdata)) {
3370 u8 bssid[ETH_ALEN];
3371
3372 memcpy(bssid, ifmgd->assoc_data->bss->bssid, ETH_ALEN);
3373
3374 ieee80211_destroy_assoc_data(sdata, false);
3375
3376 mutex_unlock(&ifmgd->mtx);
3377 cfg80211_send_assoc_timeout(sdata->dev, bssid);
3378 mutex_lock(&ifmgd->mtx);
3379 }
89afe614 3380 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
66e67e41
JB		 3381 run_again(ifmgd, ifmgd->assoc_data->timeout);
3382
b291ba11
JB		 3383 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
3384 IEEE80211_STA_CONNECTION_POLL) &&
3385 ifmgd->associated) {
a43abf29 3386 u8 bssid[ETH_ALEN];
72a8a3ed 3387 int max_tries;
a43abf29 3388
0c1ad2ca 3389 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 3390
72a8a3ed 3391 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
180205bd 3392 max_tries = max_nullfunc_tries;
72a8a3ed 3393 else
180205bd 3394 max_tries = max_probe_tries;
72a8a3ed 3395
4e5ff376
FF		 3396 /* ACK received for nullfunc probing frame */
3397 if (!ifmgd->probe_send_count)
3398 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 3399 else if (ifmgd->nullfunc_failed) {
3400 if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3401 mlme_dbg(sdata,
3402 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3403 bssid, ifmgd->probe_send_count,
3404 max_tries);
04ac3c0e
FF		 3405 ieee80211_mgd_probe_ap_send(sdata);
3406 } else {
bdcbd8e0
JB		 3407 mlme_dbg(sdata,
3408 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3409 bssid);
95acac61 3410 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1
JB		 3411 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3412 false);
04ac3c0e
FF		 3413 }
3414 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
b291ba11 3415 run_again(ifmgd, ifmgd->probe_timeout);
04ac3c0e 3416 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
bdcbd8e0
JB		 3417 mlme_dbg(sdata,
3418 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3419 bssid, probe_wait_ms);
95acac61 3420 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 3421 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
04ac3c0e 3422 } else if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3423 mlme_dbg(sdata,
3424 "No probe response from AP %pM after %dms, try %d/%i\n",
3425 bssid, probe_wait_ms,
3426 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 3427 ieee80211_mgd_probe_ap_send(sdata);
3428 } else {
b291ba11
JB		 3429 /*
3430 * We actually lost the connection ... or did we?
3431 * Let's make sure!
3432 */
b38afa87
BG		 3433 wiphy_debug(local->hw.wiphy,
3434 "%s: No probe response from AP %pM"
3435 " after %dms, disconnecting.\n",
3436 sdata->name,
180205bd 3437 bssid, probe_wait_ms);
04ac3c0e 3438
95acac61 3439 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 3440 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
b291ba11
JB		 3441 }
3442 }
3443
77fdaa12 3444 mutex_unlock(&ifmgd->mtx);
f0706e82
JB		 3445}
3446
b291ba11
JB		 3447static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3448{
3449 struct ieee80211_sub_if_data *sdata =
3450 (struct ieee80211_sub_if_data *) data;
3451 struct ieee80211_local *local = sdata->local;
3452
3453 if (local->quiescing)
3454 return;
3455
682bd38b 3456 sdata->u.mgd.connection_loss = false;
1e4dcd01
JO		 3457 ieee80211_queue_work(&sdata->local->hw,
3458 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 3459}
3460
3461static void ieee80211_sta_conn_mon_timer(unsigned long data)
3462{
3463 struct ieee80211_sub_if_data *sdata =
3464 (struct ieee80211_sub_if_data *) data;
3465 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3466 struct ieee80211_local *local = sdata->local;
3467
3468 if (local->quiescing)
3469 return;
3470
42935eca 3471 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 3472}
3473
3474static void ieee80211_sta_monitor_work(struct work_struct *work)
3475{
3476 struct ieee80211_sub_if_data *sdata =
3477 container_of(work, struct ieee80211_sub_if_data,
3478 u.mgd.monitor_work);
3479
3480 ieee80211_mgd_probe_ap(sdata, false);
3481}
3482
9c6bd790
JB		 3483static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3484{
494f1fe5
EP		 3485 u32 flags;
3486
ad935687 3487 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
925e64c3 3488 __ieee80211_stop_poll(sdata);
ad935687 3489
b291ba11 3490 /* let's probe the connection once */
494f1fe5
EP		 3491 flags = sdata->local->hw.flags;
3492 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3493 ieee80211_queue_work(&sdata->local->hw,
3494 &sdata->u.mgd.monitor_work);
b291ba11 3495 /* and do all the other regular work too */
64592c8f 3496 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 3497 }
9c6bd790 3498}
f0706e82 3499
9c6bd790
JB		 3500/* interface setup */
3501void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 3502{
46900298 3503 struct ieee80211_if_managed *ifmgd;
988c0f72 3504
46900298 3505 ifmgd = &sdata->u.mgd;
b291ba11 3506 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 3507 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 3508 INIT_WORK(&ifmgd->beacon_connection_loss_work,
3509 ieee80211_beacon_connection_loss_work);
882a7c69
JB		 3510 INIT_WORK(&ifmgd->csa_connection_drop_work,
3511 ieee80211_csa_connection_drop_work);
d1f5b7a3 3512 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
46900298 3513 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 3514 (unsigned long) sdata);
b291ba11
JB		 3515 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
3516 (unsigned long) sdata);
3517 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
3518 (unsigned long) sdata);
46900298 3519 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 3520 (unsigned long) sdata);
9c6bd790 3521
ab1faead 3522 ifmgd->flags = 0;
1478acb3 3523 ifmgd->powersave = sdata->wdev.ps;
dc41e4d4
EP		 3524 ifmgd->uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
3525 ifmgd->uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
bbbdff9e 3526
77fdaa12 3527 mutex_init(&ifmgd->mtx);
0f78231b
JB		 3528
3529 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
3530 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
3531 else
3532 ifmgd->req_smps = IEEE80211_SMPS_OFF;
f0706e82
JB		 3533}
3534
77fdaa12
JB		 3535/* scan finished notification */
3536void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 3537{
31ee67a1 3538 struct ieee80211_sub_if_data *sdata;
60f8b39c 3539
77fdaa12
JB		 3540 /* Restart STA timers */
3541 rcu_read_lock();
3542 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3543 ieee80211_restart_sta_timer(sdata);
3544 rcu_read_unlock();
3545}
60f8b39c 3546
77fdaa12
JB		 3547int ieee80211_max_network_latency(struct notifier_block *nb,
3548 unsigned long data, void *dummy)
3549{
3550 s32 latency_usec = (s32) data;
3551 struct ieee80211_local *local =
3552 container_of(nb, struct ieee80211_local,
3553 network_latency_notifier);
1fa6f4af 3554
77fdaa12
JB		 3555 mutex_lock(&local->iflist_mtx);
3556 ieee80211_recalc_ps(local, latency_usec);
3557 mutex_unlock(&local->iflist_mtx);
dfe67012 3558
77fdaa12 3559 return 0;
9c6bd790
JB		 3560}
3561
f2d9d270
JB		 3562static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
3563 struct cfg80211_bss *cbss)
3564{
3565 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3566 const u8 *ht_cap_ie, *vht_cap_ie;
3567 const struct ieee80211_ht_cap *ht_cap;
3568 const struct ieee80211_vht_cap *vht_cap;
3569 u8 chains = 1;
3570
3571 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
3572 return chains;
3573
9caf0364 3574 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
f2d9d270
JB		 3575 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
3576 ht_cap = (void *)(ht_cap_ie + 2);
3577 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
3578 /*
3579 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
3580 * "Tx Unequal Modulation Supported" fields.
3581 */
3582 }
3583
3584 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
3585 return chains;
3586
9caf0364 3587 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
f2d9d270
JB		 3588 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
3589 u8 nss;
3590 u16 tx_mcs_map;
3591
3592 vht_cap = (void *)(vht_cap_ie + 2);
3593 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
3594 for (nss = 8; nss > 0; nss--) {
3595 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
3596 IEEE80211_VHT_MCS_NOT_SUPPORTED)
3597 break;
3598 }
3599 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
3600 chains = max(chains, nss);
3601 }
3602
3603 return chains;
3604}
3605
b17166a7
JB		 3606static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
3607 struct cfg80211_bss *cbss)
a1cf775d
JB		 3608{
3609 struct ieee80211_local *local = sdata->local;
3610 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
24398e39 3611 const struct ieee80211_ht_operation *ht_oper = NULL;
f2d9d270 3612 const struct ieee80211_vht_operation *vht_oper = NULL;
24398e39 3613 struct ieee80211_supported_band *sband;
4bf88530 3614 struct cfg80211_chan_def chandef;
f2d9d270 3615 int ret;
a1cf775d 3616
24398e39
JB		 3617 sband = local->hw.wiphy->bands[cbss->channel->band];
3618
f2d9d270
JB		 3619 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
3620 IEEE80211_STA_DISABLE_80P80MHZ |
3621 IEEE80211_STA_DISABLE_160MHZ);
3622
9caf0364
JB		 3623 rcu_read_lock();
3624
f2d9d270
JB		 3625 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3626 sband->ht_cap.ht_supported) {
08e6effa 3627 const u8 *ht_oper_ie, *ht_cap;
24398e39 3628
9caf0364 3629 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
24398e39
JB		 3630 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3631 ht_oper = (void *)(ht_oper_ie + 2);
08e6effa
JB		 3632
3633 ht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
3634 if (!ht_cap || ht_cap[1] < sizeof(struct ieee80211_ht_cap)) {
3635 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3636 ht_oper = NULL;
3637 }
24398e39
JB		 3638 }
3639
f2d9d270
JB		 3640 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3641 sband->vht_cap.vht_supported) {
08e6effa 3642 const u8 *vht_oper_ie, *vht_cap;
f2d9d270 3643
9caf0364
JB		 3644 vht_oper_ie = ieee80211_bss_get_ie(cbss,
3645 WLAN_EID_VHT_OPERATION);
f2d9d270
JB		 3646 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
3647 vht_oper = (void *)(vht_oper_ie + 2);
3648 if (vht_oper && !ht_oper) {
3649 vht_oper = NULL;
bdcbd8e0 3650 sdata_info(sdata,
f2d9d270 3651 "AP advertised VHT without HT, disabling both\n");
cb145022
JB		 3652 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3653 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
24398e39 3654 }
08e6effa
JB		 3655
3656 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
3657 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
3658 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3659 vht_oper = NULL;
3660 }
24398e39
JB		 3661 }
3662
f2d9d270
JB		 3663 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
3664 cbss->channel,
3665 ht_oper, vht_oper,
30eb1dc2 3666 &chandef, true);
04ecd257 3667
f2d9d270
JB		 3668 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
3669 local->rx_chains);
24398e39 3670
9caf0364
JB		 3671 rcu_read_unlock();
3672
04ecd257
JB		 3673 /* will change later if needed */
3674 sdata->smps_mode = IEEE80211_SMPS_OFF;
3675
f2d9d270
JB		 3676 /*
3677 * If this fails (possibly due to channel context sharing
3678 * on incompatible channels, e.g. 80+80 and 160 sharing the
3679 * same control channel) try to use a smaller bandwidth.
3680 */
3681 ret = ieee80211_vif_use_channel(sdata, &chandef,
3682 IEEE80211_CHANCTX_SHARED);
d601cd8d 3683 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
f2d9d270 3684 ifmgd->flags |= chandef_downgrade(&chandef);
d601cd8d
JB		 3685 ret = ieee80211_vif_use_channel(sdata, &chandef,
3686 IEEE80211_CHANCTX_SHARED);
3687 }
f2d9d270 3688 return ret;
b17166a7
JB		 3689}
3690
3691static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
3692 struct cfg80211_bss *cbss, bool assoc)
3693{
3694 struct ieee80211_local *local = sdata->local;
3695 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3696 struct ieee80211_bss *bss = (void *)cbss->priv;
3697 struct sta_info *new_sta = NULL;
3698 bool have_sta = false;
3699 int err;
3700
3701 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3702 return -EINVAL;
3703
3704 if (assoc) {
3705 rcu_read_lock();
3706 have_sta = sta_info_get(sdata, cbss->bssid);
3707 rcu_read_unlock();
3708 }
3709
3710 if (!have_sta) {
3711 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
3712 if (!new_sta)
3713 return -ENOMEM;
3714 }
3715
13e0c8e3 3716 if (new_sta) {
5d6a1b06
JB		 3717 u32 rates = 0, basic_rates = 0;
3718 bool have_higher_than_11mbit;
3719 int min_rate = INT_MAX, min_rate_index = -1;
b17166a7 3720 struct ieee80211_supported_band *sband;
8cef2c9d 3721 const struct cfg80211_bss_ies *ies;
b17166a7
JB		 3722
3723 sband = local->hw.wiphy->bands[cbss->channel->band];
3724
3725 err = ieee80211_prep_channel(sdata, cbss);
3726 if (err) {
3727 sta_info_free(local, new_sta);
3728 return err;
3729 }
5d6a1b06 3730
5d6a1b06
JB		 3731 ieee80211_get_rates(sband, bss->supp_rates,
3732 bss->supp_rates_len,
3733 &rates, &basic_rates,
3734 &have_higher_than_11mbit,
3735 &min_rate, &min_rate_index);
3736
3737 /*
3738 * This used to be a workaround for basic rates missing
3739 * in the association response frame. Now that we no
3740 * longer use the basic rates from there, it probably
3741 * doesn't happen any more, but keep the workaround so
3742 * in case some *other* APs are buggy in different ways
3743 * we can connect -- with a warning.
3744 */
3745 if (!basic_rates && min_rate_index >= 0) {
bdcbd8e0
JB		 3746 sdata_info(sdata,
3747 "No basic rates, using min rate instead\n");
5d6a1b06
JB		 3748 basic_rates = BIT(min_rate_index);
3749 }
3750
13e0c8e3 3751 new_sta->sta.supp_rates[cbss->channel->band] = rates;
5d6a1b06
JB		 3752 sdata->vif.bss_conf.basic_rates = basic_rates;
3753
3754 /* cf. IEEE 802.11 9.2.12 */
55de908a 3755 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
5d6a1b06
JB		 3756 have_higher_than_11mbit)
3757 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3758 else
3759 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
3760
3761 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
3762
8c358bcd
JB		 3763 /* set timing information */
3764 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
8cef2c9d 3765 rcu_read_lock();
ef429dad
JB		 3766 ies = rcu_dereference(cbss->beacon_ies);
3767 if (ies) {
3768 const u8 *tim_ie;
3769
3770 sdata->vif.bss_conf.sync_tsf = ies->tsf;
3771 sdata->vif.bss_conf.sync_device_ts =
3772 bss->device_ts_beacon;
3773 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
3774 ies->data, ies->len);
3775 if (tim_ie && tim_ie[1] >= 2)
3776 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
3777 else
3778 sdata->vif.bss_conf.sync_dtim_count = 0;
3779 } else if (!(local->hw.flags &
3780 IEEE80211_HW_TIMING_BEACON_ONLY)) {
3781 ies = rcu_dereference(cbss->proberesp_ies);
3782 /* must be non-NULL since beacon IEs were NULL */
3783 sdata->vif.bss_conf.sync_tsf = ies->tsf;
3784 sdata->vif.bss_conf.sync_device_ts =
3785 bss->device_ts_presp;
3786 sdata->vif.bss_conf.sync_dtim_count = 0;
3787 } else {
3788 sdata->vif.bss_conf.sync_tsf = 0;
3789 sdata->vif.bss_conf.sync_device_ts = 0;
3790 sdata->vif.bss_conf.sync_dtim_count = 0;
3791 }
8cef2c9d 3792 rcu_read_unlock();
8c358bcd
JB		 3793
3794 /* tell driver about BSSID, basic rates and timing */
5d6a1b06 3795 ieee80211_bss_info_change_notify(sdata,
8c358bcd
JB		 3796 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
3797 BSS_CHANGED_BEACON_INT);
a1cf775d
JB		 3798
3799 if (assoc)
13e0c8e3 3800 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
a1cf775d 3801
13e0c8e3
JB		 3802 err = sta_info_insert(new_sta);
3803 new_sta = NULL;
a1cf775d 3804 if (err) {
bdcbd8e0
JB		 3805 sdata_info(sdata,
3806 "failed to insert STA entry for the AP (error %d)\n",
3807 err);
a1cf775d
JB		 3808 return err;
3809 }
3810 } else
b203ca39 3811 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
a1cf775d
JB		 3812
3813 return 0;
3814}
3815
77fdaa12
JB		 3816/* config hooks */
3817int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
3818 struct cfg80211_auth_request *req)
9c6bd790 3819{
66e67e41
JB		 3820 struct ieee80211_local *local = sdata->local;
3821 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3822 struct ieee80211_mgd_auth_data *auth_data;
77fdaa12 3823 u16 auth_alg;
66e67e41
JB		 3824 int err;
3825
3826 /* prepare auth data structure */
9c6bd790 3827
77fdaa12
JB		 3828 switch (req->auth_type) {
3829 case NL80211_AUTHTYPE_OPEN_SYSTEM:
3830 auth_alg = WLAN_AUTH_OPEN;
3831 break;
3832 case NL80211_AUTHTYPE_SHARED_KEY:
66e67e41 3833 if (IS_ERR(local->wep_tx_tfm))
9dca9c49 3834 return -EOPNOTSUPP;
77fdaa12
JB		 3835 auth_alg = WLAN_AUTH_SHARED_KEY;
3836 break;
3837 case NL80211_AUTHTYPE_FT:
3838 auth_alg = WLAN_AUTH_FT;
3839 break;
3840 case NL80211_AUTHTYPE_NETWORK_EAP:
3841 auth_alg = WLAN_AUTH_LEAP;
3842 break;
6b8ece3a
JM		 3843 case NL80211_AUTHTYPE_SAE:
3844 auth_alg = WLAN_AUTH_SAE;
3845 break;
77fdaa12
JB		 3846 default:
3847 return -EOPNOTSUPP;
60f8b39c 3848 }
77fdaa12 3849
6b8ece3a
JM		 3850 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
3851 req->ie_len, GFP_KERNEL);
66e67e41 3852 if (!auth_data)
9c6bd790 3853 return -ENOMEM;
77fdaa12 3854
66e67e41 3855 auth_data->bss = req->bss;
77fdaa12 3856
6b8ece3a
JM		 3857 if (req->sae_data_len >= 4) {
3858 __le16 *pos = (__le16 *) req->sae_data;
3859 auth_data->sae_trans = le16_to_cpu(pos[0]);
3860 auth_data->sae_status = le16_to_cpu(pos[1]);
3861 memcpy(auth_data->data, req->sae_data + 4,
3862 req->sae_data_len - 4);
3863 auth_data->data_len += req->sae_data_len - 4;
3864 }
3865
77fdaa12 3866 if (req->ie && req->ie_len) {
6b8ece3a
JM		 3867 memcpy(&auth_data->data[auth_data->data_len],
3868 req->ie, req->ie_len);
3869 auth_data->data_len += req->ie_len;
9c6bd790 3870 }
77fdaa12 3871
fffd0934 3872 if (req->key && req->key_len) {
66e67e41
JB		 3873 auth_data->key_len = req->key_len;
3874 auth_data->key_idx = req->key_idx;
3875 memcpy(auth_data->key, req->key, req->key_len);
fffd0934
JB		 3876 }
3877
66e67e41 3878 auth_data->algorithm = auth_alg;
60f8b39c 3879
66e67e41 3880 /* try to authenticate/probe */
2a33bee2 3881
66e67e41 3882 mutex_lock(&ifmgd->mtx);
2a33bee2 3883
66e67e41
JB		 3884 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
3885 ifmgd->assoc_data) {
3886 err = -EBUSY;
3887 goto err_free;
2a33bee2
GE		 3888 }
3889
66e67e41
JB		 3890 if (ifmgd->auth_data)
3891 ieee80211_destroy_auth_data(sdata, false);
2a33bee2 3892
66e67e41
JB		 3893 /* prep auth_data so we don't go into idle on disassoc */
3894 ifmgd->auth_data = auth_data;
af6b6374 3895
66e67e41 3896 if (ifmgd->associated)
37ad3888 3897 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
af6b6374 3898
bdcbd8e0 3899 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
e5b900d2 3900
a1cf775d
JB		 3901 err = ieee80211_prep_connection(sdata, req->bss, false);
3902 if (err)
66e67e41 3903 goto err_clear;
af6b6374 3904
66e67e41
JB		 3905 err = ieee80211_probe_auth(sdata);
3906 if (err) {
66e67e41
JB		 3907 sta_info_destroy_addr(sdata, req->bss->bssid);
3908 goto err_clear;
3909 }
3910
3911 /* hold our own reference */
5b112d3d 3912 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
66e67e41
JB		 3913 err = 0;
3914 goto out_unlock;
3915
3916 err_clear:
3d2abdfd
EP		 3917 memset(ifmgd->bssid, 0, ETH_ALEN);
3918 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 3919 ifmgd->auth_data = NULL;
3920 err_free:
3921 kfree(auth_data);
3922 out_unlock:
3923 mutex_unlock(&ifmgd->mtx);
b2abb6e2 3924
66e67e41 3925 return err;
af6b6374
JB		 3926}
3927
77fdaa12
JB		 3928int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
3929 struct cfg80211_assoc_request *req)
f0706e82 3930{
66e67e41 3931 struct ieee80211_local *local = sdata->local;
77fdaa12 3932 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 3933 struct ieee80211_bss *bss = (void *)req->bss->priv;
66e67e41 3934 struct ieee80211_mgd_assoc_data *assoc_data;
c65dd147 3935 const struct cfg80211_bss_ies *beacon_ies;
4e74bfdb 3936 struct ieee80211_supported_band *sband;
b08fbbd8 3937 const u8 *ssidie, *ht_ie, *vht_ie;
2a33bee2 3938 int i, err;
f0706e82 3939
66e67e41
JB		 3940 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
3941 if (!assoc_data)
3942 return -ENOMEM;
3943
9caf0364
JB		 3944 rcu_read_lock();
3945 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
3946 if (!ssidie) {
3947 rcu_read_unlock();
3948 kfree(assoc_data);
3949 return -EINVAL;
3950 }
3951 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
3952 assoc_data->ssid_len = ssidie[1];
3953 rcu_read_unlock();
3954
77fdaa12 3955 mutex_lock(&ifmgd->mtx);
9c87ba67 3956
66e67e41 3957 if (ifmgd->associated)
37ad3888 3958 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
66e67e41
JB		 3959
3960 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
3961 err = -EBUSY;
3962 goto err_free;
af6b6374 3963 }
77fdaa12 3964
66e67e41
JB		 3965 if (ifmgd->assoc_data) {
3966 err = -EBUSY;
3967 goto err_free;
3968 }
77fdaa12 3969
66e67e41
JB		 3970 if (ifmgd->auth_data) {
3971 bool match;
3972
3973 /* keep sta info, bssid if matching */
b203ca39 3974 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
66e67e41 3975 ieee80211_destroy_auth_data(sdata, match);
2a33bee2
GE		 3976 }
3977
66e67e41 3978 /* prepare assoc data */
19c3b830 3979
d8ec4433
JO		 3980 ifmgd->beacon_crc_valid = false;
3981
de5036aa
JB		 3982 /*
3983 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
3984 * We still associate in non-HT mode (11a/b/g) if any one of these
3985 * ciphers is configured as pairwise.
3986 * We can set this to true for non-11n hardware, that'll be checked
3987 * separately along with the peer capabilities.
3988 */
1c4cb928 3989 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
77fdaa12
JB		 3990 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
3991 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
1c4cb928 3992 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
a8243b72 3993 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
d545daba 3994 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
1c4cb928 3995 netdev_info(sdata->dev,
d545daba 3996 "disabling HT/VHT due to WEP/TKIP use\n");
1c4cb928
JB		 3997 }
3998 }
77fdaa12 3999
d545daba 4000 if (req->flags & ASSOC_REQ_DISABLE_HT) {
a8243b72 4001 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
d545daba
MP		 4002 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4003 }
ef96a842 4004
dd5ecfea
JB		 4005 if (req->flags & ASSOC_REQ_DISABLE_VHT)
4006 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4007
4e74bfdb
JB		 4008 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4009 sband = local->hw.wiphy->bands[req->bss->channel->band];
4010 if (!sband->ht_cap.ht_supported ||
1c4cb928 4011 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
a8243b72 4012 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
1b49de26
JB		 4013 if (!bss->wmm_used)
4014 netdev_info(sdata->dev,
4015 "disabling HT as WMM/QoS is not supported by the AP\n");
1c4cb928 4016 }
4e74bfdb 4017
d545daba
MP		 4018 /* disable VHT if we don't support it or the AP doesn't use WMM */
4019 if (!sband->vht_cap.vht_supported ||
4020 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
4021 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
1b49de26
JB		 4022 if (!bss->wmm_used)
4023 netdev_info(sdata->dev,
4024 "disabling VHT as WMM/QoS is not supported by the AP\n");
d545daba
MP		 4025 }
4026
ef96a842
BG		 4027 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4028 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4029 sizeof(ifmgd->ht_capa_mask));
4030
dd5ecfea
JB		 4031 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4032 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4033 sizeof(ifmgd->vht_capa_mask));
4034
77fdaa12 4035 if (req->ie && req->ie_len) {
66e67e41
JB		 4036 memcpy(assoc_data->ie, req->ie, req->ie_len);
4037 assoc_data->ie_len = req->ie_len;
4038 }
f679f65d 4039
66e67e41 4040 assoc_data->bss = req->bss;
f679f65d 4041
af6b6374
JB		 4042 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4043 if (ifmgd->powersave)
04ecd257 4044 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
af6b6374 4045 else
04ecd257 4046 sdata->smps_mode = IEEE80211_SMPS_OFF;
af6b6374 4047 } else
04ecd257 4048 sdata->smps_mode = ifmgd->req_smps;
af6b6374 4049
66e67e41 4050 assoc_data->capability = req->bss->capability;
32c5057b
JB		 4051 assoc_data->wmm = bss->wmm_used &&
4052 (local->hw.queues >= IEEE80211_NUM_ACS);
66e67e41
JB		 4053 assoc_data->supp_rates = bss->supp_rates;
4054 assoc_data->supp_rates_len = bss->supp_rates_len;
9dde6423 4055
9caf0364 4056 rcu_read_lock();
9dde6423
JB		 4057 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4058 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4059 assoc_data->ap_ht_param =
4060 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4061 else
a8243b72 4062 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
b08fbbd8
JB		 4063 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4064 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4065 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4066 sizeof(struct ieee80211_vht_cap));
4067 else
4068 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
9caf0364 4069 rcu_read_unlock();
63f170e0 4070
ab13315a
KV		 4071 if (bss->wmm_used && bss->uapsd_supported &&
4072 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
76f0303d 4073 assoc_data->uapsd = true;
ab13315a
KV		 4074 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4075 } else {
76f0303d 4076 assoc_data->uapsd = false;
ab13315a
KV		 4077 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4078 }
4079
77fdaa12 4080 if (req->prev_bssid)
66e67e41 4081 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12
JB		 4082
4083 if (req->use_mfp) {
4084 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4085 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4086 } else {
4087 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4088 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4089 }
4090
4091 if (req->crypto.control_port)
4092 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4093 else
4094 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4095
a621fa4d
JB		 4096 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4097 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4098
66e67e41
JB		 4099 /* kick off associate process */
4100
4101 ifmgd->assoc_data = assoc_data;
826262c3 4102 ifmgd->dtim_period = 0;
66e67e41 4103
a1cf775d
JB		 4104 err = ieee80211_prep_connection(sdata, req->bss, true);
4105 if (err)
4106 goto err_clear;
66e67e41 4107
c65dd147
EG		 4108 rcu_read_lock();
4109 beacon_ies = rcu_dereference(req->bss->beacon_ies);
826262c3 4110
c65dd147
EG		 4111 if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC &&
4112 !beacon_ies) {
4113 /*
4114 * Wait up to one beacon interval ...
4115 * should this be more if we miss one?
4116 */
4117 sdata_info(sdata, "waiting for beacon from %pM\n",
4118 ifmgd->bssid);
4119 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
89afe614 4120 assoc_data->timeout_started = true;
c65dd147
EG		 4121 assoc_data->need_beacon = true;
4122 } else if (beacon_ies) {
4123 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4124 beacon_ies->data,
4125 beacon_ies->len);
ef429dad
JB		 4126 u8 dtim_count = 0;
4127
c65dd147
EG		 4128 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4129 const struct ieee80211_tim_ie *tim;
4130 tim = (void *)(tim_ie + 2);
4131 ifmgd->dtim_period = tim->dtim_period;
ef429dad 4132 dtim_count = tim->dtim_count;
826262c3 4133 }
66e67e41 4134 assoc_data->have_beacon = true;
66e67e41 4135 assoc_data->timeout = jiffies;
89afe614 4136 assoc_data->timeout_started = true;
ef429dad
JB		 4137
4138 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
4139 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4140 sdata->vif.bss_conf.sync_device_ts =
4141 bss->device_ts_beacon;
4142 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4143 }
c65dd147
EG		 4144 } else {
4145 assoc_data->timeout = jiffies;
89afe614 4146 assoc_data->timeout_started = true;
66e67e41 4147 }
c65dd147
EG		 4148 rcu_read_unlock();
4149
66e67e41
JB		 4150 run_again(ifmgd, assoc_data->timeout);
4151
fcff4f10
PS		 4152 if (bss->corrupt_data) {
4153 char *corrupt_type = "data";
4154 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4155 if (bss->corrupt_data &
4156 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4157 corrupt_type = "beacon and probe response";
4158 else
4159 corrupt_type = "beacon";
4160 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4161 corrupt_type = "probe response";
bdcbd8e0
JB		 4162 sdata_info(sdata, "associating with AP with corrupt %s\n",
4163 corrupt_type);
fcff4f10
PS		 4164 }
4165
66e67e41
JB		 4166 err = 0;
4167 goto out;
4168 err_clear:
3d2abdfd
EP		 4169 memset(ifmgd->bssid, 0, ETH_ALEN);
4170 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 4171 ifmgd->assoc_data = NULL;
4172 err_free:
4173 kfree(assoc_data);
4174 out:
4175 mutex_unlock(&ifmgd->mtx);
4176
4177 return err;
f0706e82
JB		 4178}
4179
77fdaa12 4180int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
63c9c5e7 4181 struct cfg80211_deauth_request *req)
f0706e82 4182{
46900298 4183 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 4184 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
6863255b 4185 bool tx = !req->local_state_change;
86552017 4186 bool sent_frame = false;
f0706e82 4187
77fdaa12
JB		 4188 mutex_lock(&ifmgd->mtx);
4189
bdcbd8e0
JB		 4190 sdata_info(sdata,
4191 "deauthenticating from %pM by local choice (reason=%d)\n",
4192 req->bssid, req->reason_code);
0ff71613 4193
86552017 4194 if (ifmgd->auth_data) {
8c7d857c 4195 drv_mgd_prepare_tx(sdata->local, sdata);
37ad3888
JB		 4196 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4197 IEEE80211_STYPE_DEAUTH,
6863255b 4198 req->reason_code, tx,
37ad3888 4199 frame_buf);
86552017
JB		 4200 ieee80211_destroy_auth_data(sdata, false);
4201 mutex_unlock(&ifmgd->mtx);
4202
4203 sent_frame = tx;
4204 goto out;
8c7d857c
EG		 4205 }
4206
86552017
JB		 4207 if (ifmgd->associated &&
4208 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
4209 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4210 req->reason_code, tx, frame_buf);
4211 sent_frame = tx;
4212 }
37ad3888
JB		 4213 mutex_unlock(&ifmgd->mtx);
4214
86552017 4215 out:
86552017
JB		 4216 if (sent_frame)
4217 __cfg80211_send_deauth(sdata->dev, frame_buf,
4218 IEEE80211_DEAUTH_FRAME_LEN);
4219
f0706e82
JB		 4220 return 0;
4221}
84363e6e 4222
77fdaa12 4223int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 4224 struct cfg80211_disassoc_request *req)
9c6bd790 4225{
77fdaa12 4226 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 4227 u8 bssid[ETH_ALEN];
6ae16775 4228 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
9c6bd790 4229
77fdaa12 4230 mutex_lock(&ifmgd->mtx);
10f644a4 4231
8d8b261a
JB		 4232 /*
4233 * cfg80211 should catch this ... but it's racy since
4234 * we can receive a disassoc frame, process it, hand it
4235 * to cfg80211 while that's in a locked section already
4236 * trying to tell us that the user wants to disconnect.
4237 */
0c1ad2ca 4238 if (ifmgd->associated != req->bss) {
77fdaa12
JB		 4239 mutex_unlock(&ifmgd->mtx);
4240 return -ENOLINK;
4241 }
4242
bdcbd8e0
JB		 4243 sdata_info(sdata,
4244 "disassociating from %pM by local choice (reason=%d)\n",
4245 req->bss->bssid, req->reason_code);
0ff71613 4246
e69e95db 4247 memcpy(bssid, req->bss->bssid, ETH_ALEN);
37ad3888
JB		 4248 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4249 req->reason_code, !req->local_state_change,
4250 frame_buf);
77fdaa12 4251 mutex_unlock(&ifmgd->mtx);
10f644a4 4252
6ae16775
AQ		 4253 __cfg80211_send_disassoc(sdata->dev, frame_buf,
4254 IEEE80211_DEAUTH_FRAME_LEN);
bc83b681 4255
10f644a4
JB		 4256 return 0;
4257}
026331c4 4258
afa762f6 4259void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
54e4ffb2
JB		 4260{
4261 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4262
49921859
BG		 4263 /*
4264 * Make sure some work items will not run after this,
4265 * they will not do anything but might not have been
4266 * cancelled when disconnecting.
4267 */
4268 cancel_work_sync(&ifmgd->monitor_work);
4269 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
4270 cancel_work_sync(&ifmgd->request_smps_work);
4271 cancel_work_sync(&ifmgd->csa_connection_drop_work);
4272 cancel_work_sync(&ifmgd->chswitch_work);
4273
54e4ffb2
JB		 4274 mutex_lock(&ifmgd->mtx);
4275 if (ifmgd->assoc_data)
4276 ieee80211_destroy_assoc_data(sdata, false);
4277 if (ifmgd->auth_data)
4278 ieee80211_destroy_auth_data(sdata, false);
4279 del_timer_sync(&ifmgd->timer);
4280 mutex_unlock(&ifmgd->mtx);
4281}
4282
a97c13c3
JO		 4283void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
4284 enum nl80211_cqm_rssi_threshold_event rssi_event,
4285 gfp_t gfp)
4286{
4287 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4288
b5878a2d
JB		 4289 trace_api_cqm_rssi_notify(sdata, rssi_event);
4290
a97c13c3
JO		 4291 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
4292}
4293EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
Linux kernel - Deliverables
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