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mac80211: check ERP info IE length in parser
[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);
675a0b04 991 struct ieee80211_local *local = sdata->local;
cc32abd4
JB		 992 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
993
9607e6b6 994 if (!ieee80211_sdata_running(sdata))
cc32abd4
JB		 995 return;
996
77fdaa12
JB		 997 mutex_lock(&ifmgd->mtx);
998 if (!ifmgd->associated)
999 goto out;
cc32abd4 1000
675a0b04
KB		 1001 /*
1002 * FIXME: Here we are downgrading to NL80211_CHAN_WIDTH_20_NOHT
1003 * and don't adjust our ht/vht settings
1004 * This is wrong - we should behave according to the CSA params
1005 */
1006 local->_oper_chandef.chan = local->csa_channel;
1007 local->_oper_chandef.width = NL80211_CHAN_WIDTH_20_NOHT;
1008 local->_oper_chandef.center_freq1 =
1009 local->_oper_chandef.chan->center_freq;
1010 local->_oper_chandef.center_freq2 = 0;
1011
1012 if (!local->ops->channel_switch) {
5ce6e438 1013 /* call "hw_config" only if doing sw channel switch */
675a0b04 1014 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
1ea57b1f
SL		 1015 } else {
1016 /* update the device channel directly */
675a0b04 1017 local->hw.conf.chandef = local->_oper_chandef;
5ce6e438 1018 }
77fdaa12 1019
cc32abd4 1020 /* XXX: shouldn't really modify cfg80211-owned data! */
675a0b04 1021 ifmgd->associated->channel = local->_oper_chandef.chan;
cc32abd4 1022
57eebdf3 1023 /* XXX: wait for a beacon first? */
675a0b04 1024 ieee80211_wake_queues_by_reason(&local->hw,
445ea4e8 1025 IEEE80211_MAX_QUEUE_MAP,
cc32abd4 1026 IEEE80211_QUEUE_STOP_REASON_CSA);
77fdaa12
JB		 1027 out:
1028 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
1029 mutex_unlock(&ifmgd->mtx);
cc32abd4
JB		 1030}
1031
5ce6e438
JB		 1032void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1033{
55de908a
JB		 1034 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1035 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5ce6e438
JB		 1036
1037 trace_api_chswitch_done(sdata, success);
1038 if (!success) {
882a7c69
JB		 1039 sdata_info(sdata,
1040 "driver channel switch failed, disconnecting\n");
1041 ieee80211_queue_work(&sdata->local->hw,
1042 &ifmgd->csa_connection_drop_work);
1043 } else {
1044 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
5ce6e438 1045 }
5ce6e438
JB		 1046}
1047EXPORT_SYMBOL(ieee80211_chswitch_done);
1048
cc32abd4
JB		 1049static void ieee80211_chswitch_timer(unsigned long data)
1050{
1051 struct ieee80211_sub_if_data *sdata =
1052 (struct ieee80211_sub_if_data *) data;
5bb644a0 1053
9b7d72c1 1054 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
cc32abd4
JB		 1055}
1056
4a3cb702
JB		 1057void
1058ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1059 const struct ieee80211_channel_sw_ie *sw_elem,
1060 struct ieee80211_bss *bss, u64 timestamp)
cc32abd4 1061{
0c1ad2ca
JB		 1062 struct cfg80211_bss *cbss =
1063 container_of((void *)bss, struct cfg80211_bss, priv);
cc32abd4
JB		 1064 struct ieee80211_channel *new_ch;
1065 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
59eb21a6
BR		 1066 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num,
1067 cbss->channel->band);
55de908a 1068 struct ieee80211_chanctx *chanctx;
cc32abd4 1069
77fdaa12
JB		 1070 ASSERT_MGD_MTX(ifmgd);
1071
1072 if (!ifmgd->associated)
cc32abd4
JB		 1073 return;
1074
fbe9c429 1075 if (sdata->local->scanning)
cc32abd4
JB		 1076 return;
1077
1078 /* Disregard subsequent beacons if we are already running a timer
1079 processing a CSA */
1080
1081 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
1082 return;
1083
1084 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
882a7c69
JB		 1085 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED) {
1086 sdata_info(sdata,
1087 "AP %pM switches to unsupported channel (%d MHz), disconnecting\n",
1088 ifmgd->associated->bssid, new_freq);
1089 ieee80211_queue_work(&sdata->local->hw,
1090 &ifmgd->csa_connection_drop_work);
cc32abd4 1091 return;
882a7c69 1092 }
cc32abd4 1093
57eebdf3
JB		 1094 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
1095
55de908a
JB		 1096 if (sdata->local->use_chanctx) {
1097 sdata_info(sdata,
1098 "not handling channel switch with channel contexts\n");
1099 ieee80211_queue_work(&sdata->local->hw,
1100 &ifmgd->csa_connection_drop_work);
246dc3fd 1101 return;
55de908a
JB		 1102 }
1103
1104 mutex_lock(&sdata->local->chanctx_mtx);
1105 if (WARN_ON(!rcu_access_pointer(sdata->vif.chanctx_conf))) {
1106 mutex_unlock(&sdata->local->chanctx_mtx);
1107 return;
1108 }
1109 chanctx = container_of(rcu_access_pointer(sdata->vif.chanctx_conf),
1110 struct ieee80211_chanctx, conf);
1111 if (chanctx->refcount > 1) {
1112 sdata_info(sdata,
1113 "channel switch with multiple interfaces on the same channel, disconnecting\n");
1114 ieee80211_queue_work(&sdata->local->hw,
1115 &ifmgd->csa_connection_drop_work);
1116 mutex_unlock(&sdata->local->chanctx_mtx);
1117 return;
1118 }
1119 mutex_unlock(&sdata->local->chanctx_mtx);
1120
1121 sdata->local->csa_channel = new_ch;
1122
57eebdf3
JB		 1123 if (sw_elem->mode)
1124 ieee80211_stop_queues_by_reason(&sdata->local->hw,
445ea4e8 1125 IEEE80211_MAX_QUEUE_MAP,
57eebdf3
JB		 1126 IEEE80211_QUEUE_STOP_REASON_CSA);
1127
5ce6e438
JB		 1128 if (sdata->local->ops->channel_switch) {
1129 /* use driver's channel switch callback */
57eebdf3
JB		 1130 struct ieee80211_channel_switch ch_switch = {
1131 .timestamp = timestamp,
1132 .block_tx = sw_elem->mode,
1133 .channel = new_ch,
1134 .count = sw_elem->count,
1135 };
1136
5ce6e438
JB		 1137 drv_channel_switch(sdata->local, &ch_switch);
1138 return;
1139 }
1140
1141 /* channel switch handled in software */
57eebdf3 1142 if (sw_elem->count <= 1)
42935eca 1143 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
57eebdf3 1144 else
cc32abd4 1145 mod_timer(&ifmgd->chswitch_timer,
3049000b
JB		 1146 TU_TO_EXP_TIME(sw_elem->count *
1147 cbss->beacon_interval));
cc32abd4
JB		 1148}
1149
1ea6f9c0
JB		 1150static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1151 struct ieee80211_channel *channel,
1152 const u8 *country_ie, u8 country_ie_len,
1153 const u8 *pwr_constr_elem)
cc32abd4 1154{
04b7b2ff
JB		 1155 struct ieee80211_country_ie_triplet *triplet;
1156 int chan = ieee80211_frequency_to_channel(channel->center_freq);
1157 int i, chan_pwr, chan_increment, new_ap_level;
1158 bool have_chan_pwr = false;
cc32abd4 1159
04b7b2ff
JB		 1160 /* Invalid IE */
1161 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1ea6f9c0 1162 return 0;
cc32abd4 1163
04b7b2ff
JB		 1164 triplet = (void *)(country_ie + 3);
1165 country_ie_len -= 3;
1166
1167 switch (channel->band) {
1168 default:
1169 WARN_ON_ONCE(1);
1170 /* fall through */
1171 case IEEE80211_BAND_2GHZ:
1172 case IEEE80211_BAND_60GHZ:
1173 chan_increment = 1;
1174 break;
1175 case IEEE80211_BAND_5GHZ:
1176 chan_increment = 4;
1177 break;
cc32abd4 1178 }
04b7b2ff
JB		 1179
1180 /* find channel */
1181 while (country_ie_len >= 3) {
1182 u8 first_channel = triplet->chans.first_channel;
1183
1184 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1185 goto next;
1186
1187 for (i = 0; i < triplet->chans.num_channels; i++) {
1188 if (first_channel + i * chan_increment == chan) {
1189 have_chan_pwr = true;
1190 chan_pwr = triplet->chans.max_power;
1191 break;
1192 }
1193 }
1194 if (have_chan_pwr)
1195 break;
1196
1197 next:
1198 triplet++;
1199 country_ie_len -= 3;
1200 }
1201
1202 if (!have_chan_pwr)
1ea6f9c0 1203 return 0;
04b7b2ff
JB		 1204
1205 new_ap_level = max_t(int, 0, chan_pwr - *pwr_constr_elem);
1206
1ea6f9c0
JB		 1207 if (sdata->ap_power_level == new_ap_level)
1208 return 0;
04b7b2ff
JB		 1209
1210 sdata_info(sdata,
1211 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1212 new_ap_level, chan_pwr, *pwr_constr_elem,
1213 sdata->u.mgd.bssid);
1ea6f9c0
JB		 1214 sdata->ap_power_level = new_ap_level;
1215 if (__ieee80211_recalc_txpower(sdata))
1216 return BSS_CHANGED_TXPOWER;
1217 return 0;
cc32abd4
JB		 1218}
1219
965bedad
JB		 1220/* powersave */
1221static void ieee80211_enable_ps(struct ieee80211_local *local,
1222 struct ieee80211_sub_if_data *sdata)
1223{
1224 struct ieee80211_conf *conf = &local->hw.conf;
1225
d5edaedc
JB		 1226 /*
1227 * If we are scanning right now then the parameters will
1228 * take effect when scan finishes.
1229 */
fbe9c429 1230 if (local->scanning)
d5edaedc
JB		 1231 return;
1232
965bedad
JB		 1233 if (conf->dynamic_ps_timeout > 0 &&
1234 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
1235 mod_timer(&local->dynamic_ps_timer, jiffies +
1236 msecs_to_jiffies(conf->dynamic_ps_timeout));
1237 } else {
1238 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1239 ieee80211_send_nullfunc(local, sdata, 1);
375177bf 1240
2a13052f
JO		 1241 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1242 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
1243 return;
1244
1245 conf->flags |= IEEE80211_CONF_PS;
1246 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965bedad
JB		 1247 }
1248}
1249
1250static void ieee80211_change_ps(struct ieee80211_local *local)
1251{
1252 struct ieee80211_conf *conf = &local->hw.conf;
1253
1254 if (local->ps_sdata) {
965bedad
JB		 1255 ieee80211_enable_ps(local, local->ps_sdata);
1256 } else if (conf->flags & IEEE80211_CONF_PS) {
1257 conf->flags &= ~IEEE80211_CONF_PS;
1258 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1259 del_timer_sync(&local->dynamic_ps_timer);
1260 cancel_work_sync(&local->dynamic_ps_enable_work);
1261 }
1262}
1263
808118cb
JY		 1264static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1265{
1266 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1267 struct sta_info *sta = NULL;
c2c98fde 1268 bool authorized = false;
808118cb
JY		 1269
1270 if (!mgd->powersave)
1271 return false;
1272
05cb9108
JB		 1273 if (mgd->broken_ap)
1274 return false;
1275
808118cb
JY		 1276 if (!mgd->associated)
1277 return false;
1278
808118cb
JY		 1279 if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
1280 IEEE80211_STA_CONNECTION_POLL))
1281 return false;
1282
1283 rcu_read_lock();
1284 sta = sta_info_get(sdata, mgd->bssid);
1285 if (sta)
c2c98fde 1286 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
808118cb
JY		 1287 rcu_read_unlock();
1288
c2c98fde 1289 return authorized;
808118cb
JY		 1290}
1291
965bedad 1292/* need to hold RTNL or interface lock */
10f644a4 1293void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 1294{
1295 struct ieee80211_sub_if_data *sdata, *found = NULL;
1296 int count = 0;
195e294d 1297 int timeout;
965bedad
JB		 1298
1299 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
1300 local->ps_sdata = NULL;
1301 return;
1302 }
1303
1304 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 1305 if (!ieee80211_sdata_running(sdata))
965bedad 1306 continue;
8c7914de
RM		 1307 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1308 /* If an AP vif is found, then disable PS
1309 * by setting the count to zero thereby setting
1310 * ps_sdata to NULL.
1311 */
1312 count = 0;
1313 break;
1314 }
965bedad
JB		 1315 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1316 continue;
1317 found = sdata;
1318 count++;
1319 }
1320
808118cb 1321 if (count == 1 && ieee80211_powersave_allowed(found)) {
10f644a4
JB		 1322 s32 beaconint_us;
1323
1324 if (latency < 0)
ed77134b 1325 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
10f644a4
JB		 1326
1327 beaconint_us = ieee80211_tu_to_usec(
1328 found->vif.bss_conf.beacon_int);
1329
ff616381 1330 timeout = local->dynamic_ps_forced_timeout;
195e294d
JO		 1331 if (timeout < 0) {
1332 /*
ff616381
JO		 1333 * Go to full PSM if the user configures a very low
1334 * latency requirement.
0ab82b04
EP		 1335 * The 2000 second value is there for compatibility
1336 * until the PM_QOS_NETWORK_LATENCY is configured
1337 * with real values.
195e294d 1338 */
0ab82b04
EP		 1339 if (latency > (1900 * USEC_PER_MSEC) &&
1340 latency != (2000 * USEC_PER_SEC))
195e294d 1341 timeout = 0;
ff616381
JO		 1342 else
1343 timeout = 100;
195e294d 1344 }
09b85568 1345 local->hw.conf.dynamic_ps_timeout = timeout;
195e294d 1346
04fe2037 1347 if (beaconint_us > latency) {
10f644a4 1348 local->ps_sdata = NULL;
04fe2037 1349 } else {
04fe2037 1350 int maxslp = 1;
826262c3 1351 u8 dtimper = found->u.mgd.dtim_period;
56007a02
JB		 1352
1353 /* If the TIM IE is invalid, pretend the value is 1 */
1354 if (!dtimper)
1355 dtimper = 1;
1356 else if (dtimper > 1)
04fe2037
JB		 1357 maxslp = min_t(int, dtimper,
1358 latency / beaconint_us);
1359
9ccebe61 1360 local->hw.conf.max_sleep_period = maxslp;
56007a02 1361 local->hw.conf.ps_dtim_period = dtimper;
10f644a4 1362 local->ps_sdata = found;
04fe2037 1363 }
10f644a4 1364 } else {
965bedad 1365 local->ps_sdata = NULL;
10f644a4 1366 }
965bedad
JB		 1367
1368 ieee80211_change_ps(local);
1369}
1370
ab095877
EP		 1371void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1372{
1373 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1374
1375 if (sdata->vif.bss_conf.ps != ps_allowed) {
1376 sdata->vif.bss_conf.ps = ps_allowed;
1377 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1378 }
1379}
1380
965bedad
JB		 1381void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1382{
1383 struct ieee80211_local *local =
1384 container_of(work, struct ieee80211_local,
1385 dynamic_ps_disable_work);
1386
1387 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1388 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1389 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1390 }
1391
1392 ieee80211_wake_queues_by_reason(&local->hw,
445ea4e8 1393 IEEE80211_MAX_QUEUE_MAP,
965bedad
JB		 1394 IEEE80211_QUEUE_STOP_REASON_PS);
1395}
1396
1397void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1398{
1399 struct ieee80211_local *local =
1400 container_of(work, struct ieee80211_local,
1401 dynamic_ps_enable_work);
1402 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
5e34069c 1403 struct ieee80211_if_managed *ifmgd;
1ddc2867
RM		 1404 unsigned long flags;
1405 int q;
965bedad
JB		 1406
1407 /* can only happen when PS was just disabled anyway */
1408 if (!sdata)
1409 return;
1410
5e34069c
CL		 1411 ifmgd = &sdata->u.mgd;
1412
965bedad
JB		 1413 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1414 return;
1415
09b85568 1416 if (local->hw.conf.dynamic_ps_timeout > 0) {
77b7023a
AN		 1417 /* don't enter PS if TX frames are pending */
1418 if (drv_tx_frames_pending(local)) {
1ddc2867
RM		 1419 mod_timer(&local->dynamic_ps_timer, jiffies +
1420 msecs_to_jiffies(
1421 local->hw.conf.dynamic_ps_timeout));
1422 return;
1423 }
77b7023a
AN		 1424
1425 /*
1426 * transmission can be stopped by others which leads to
1427 * dynamic_ps_timer expiry. Postpone the ps timer if it
1428 * is not the actual idle state.
1429 */
1430 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1431 for (q = 0; q < local->hw.queues; q++) {
1432 if (local->queue_stop_reasons[q]) {
1433 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1434 flags);
1435 mod_timer(&local->dynamic_ps_timer, jiffies +
1436 msecs_to_jiffies(
1437 local->hw.conf.dynamic_ps_timeout));
1438 return;
1439 }
1440 }
1441 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1ddc2867 1442 }
1ddc2867 1443
375177bf 1444 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
9c38a8b4 1445 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
f3e85b9e 1446 netif_tx_stop_all_queues(sdata->dev);
965bedad 1447
e8306f98
VN		 1448 if (drv_tx_frames_pending(local))
1449 mod_timer(&local->dynamic_ps_timer, jiffies +
1450 msecs_to_jiffies(
1451 local->hw.conf.dynamic_ps_timeout));
1452 else {
1453 ieee80211_send_nullfunc(local, sdata, 1);
1454 /* Flush to get the tx status of nullfunc frame */
39ecc01d 1455 ieee80211_flush_queues(local, sdata);
e8306f98 1456 }
f3e85b9e
VN		 1457 }
1458
2a13052f
JO		 1459 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1460 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
375177bf
VN		 1461 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1462 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1463 local->hw.conf.flags |= IEEE80211_CONF_PS;
1464 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1465 }
f3e85b9e 1466
77b7023a
AN		 1467 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1468 netif_tx_wake_all_queues(sdata->dev);
965bedad
JB		 1469}
1470
1471void ieee80211_dynamic_ps_timer(unsigned long data)
1472{
1473 struct ieee80211_local *local = (void *) data;
1474
78f1a8b7 1475 if (local->quiescing || local->suspended)
5bb644a0
JB		 1476 return;
1477
42935eca 1478 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 1479}
1480
164eb02d
SW		 1481void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1482{
1483 struct delayed_work *delayed_work =
1484 container_of(work, struct delayed_work, work);
1485 struct ieee80211_sub_if_data *sdata =
1486 container_of(delayed_work, struct ieee80211_sub_if_data,
1487 dfs_cac_timer_work);
1488
1489 ieee80211_vif_release_channel(sdata);
1490
1491 cfg80211_cac_event(sdata->dev, NL80211_RADAR_CAC_FINISHED, GFP_KERNEL);
1492}
1493
60f8b39c 1494/* MLME */
7d25745d 1495static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
4ced3f74 1496 struct ieee80211_sub_if_data *sdata,
4a3cb702 1497 const u8 *wmm_param, size_t wmm_param_len)
f0706e82 1498{
f0706e82 1499 struct ieee80211_tx_queue_params params;
4ced3f74 1500 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1501 size_t left;
1502 int count;
4a3cb702
JB		 1503 const u8 *pos;
1504 u8 uapsd_queues = 0;
f0706e82 1505
e1b3ec1a 1506 if (!local->ops->conf_tx)
7d25745d 1507 return false;
e1b3ec1a 1508
32c5057b 1509 if (local->hw.queues < IEEE80211_NUM_ACS)
7d25745d 1510 return false;
3434fbd3
JB		 1511
1512 if (!wmm_param)
7d25745d 1513 return false;
3434fbd3 1514
f0706e82 1515 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
7d25745d 1516 return false;
ab13315a
KV		 1517
1518 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
dc41e4d4 1519 uapsd_queues = ifmgd->uapsd_queues;
ab13315a 1520
f0706e82 1521 count = wmm_param[6] & 0x0f;
46900298 1522 if (count == ifmgd->wmm_last_param_set)
7d25745d 1523 return false;
46900298 1524 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 1525
1526 pos = wmm_param + 8;
1527 left = wmm_param_len - 8;
1528
1529 memset(&params, 0, sizeof(params));
1530
00e96dec 1531 sdata->wmm_acm = 0;
f0706e82
JB		 1532 for (; left >= 4; left -= 4, pos += 4) {
1533 int aci = (pos[0] >> 5) & 0x03;
1534 int acm = (pos[0] >> 4) & 0x01;
ab13315a 1535 bool uapsd = false;
f0706e82
JB		 1536 int queue;
1537
1538 switch (aci) {
0eeb59fe 1539 case 1: /* AC_BK */
e100bb64 1540 queue = 3;
988c0f72 1541 if (acm)
00e96dec 1542 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV		 1543 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1544 uapsd = true;
f0706e82 1545 break;
0eeb59fe 1546 case 2: /* AC_VI */
e100bb64 1547 queue = 1;
988c0f72 1548 if (acm)
00e96dec 1549 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV		 1550 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1551 uapsd = true;
f0706e82 1552 break;
0eeb59fe 1553 case 3: /* AC_VO */
e100bb64 1554 queue = 0;
988c0f72 1555 if (acm)
00e96dec 1556 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV		 1557 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1558 uapsd = true;
f0706e82 1559 break;
0eeb59fe 1560 case 0: /* AC_BE */
f0706e82 1561 default:
e100bb64 1562 queue = 2;
988c0f72 1563 if (acm)
00e96dec 1564 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV		 1565 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1566 uapsd = true;
f0706e82
JB		 1567 break;
1568 }
1569
1570 params.aifs = pos[0] & 0x0f;
1571 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1572 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 1573 params.txop = get_unaligned_le16(pos + 2);
ab13315a
KV		 1574 params.uapsd = uapsd;
1575
bdcbd8e0
JB		 1576 mlme_dbg(sdata,
1577 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1578 queue, aci, acm,
1579 params.aifs, params.cw_min, params.cw_max,
1580 params.txop, params.uapsd);
f6f3def3
EP		 1581 sdata->tx_conf[queue] = params;
1582 if (drv_conf_tx(local, sdata, queue, &params))
bdcbd8e0
JB		 1583 sdata_err(sdata,
1584 "failed to set TX queue parameters for queue %d\n",
1585 queue);
f0706e82 1586 }
e1b3ec1a
SG		 1587
1588 /* enable WMM or activate new settings */
4ced3f74 1589 sdata->vif.bss_conf.qos = true;
7d25745d 1590 return true;
f0706e82
JB		 1591}
1592
925e64c3
SG		 1593static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1594{
1595 lockdep_assert_held(&sdata->local->mtx);
1596
1597 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1598 IEEE80211_STA_BEACON_POLL);
1599 ieee80211_run_deferred_scan(sdata->local);
1600}
1601
1602static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1603{
1604 mutex_lock(&sdata->local->mtx);
1605 __ieee80211_stop_poll(sdata);
1606 mutex_unlock(&sdata->local->mtx);
1607}
1608
7a5158ef
JB		 1609static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1610 u16 capab, bool erp_valid, u8 erp)
5628221c 1611{
bda3933a 1612 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 1613 u32 changed = 0;
7a5158ef
JB		 1614 bool use_protection;
1615 bool use_short_preamble;
1616 bool use_short_slot;
1617
1618 if (erp_valid) {
1619 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1620 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1621 } else {
1622 use_protection = false;
1623 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1624 }
1625
1626 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
55de908a 1627 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
43d35343 1628 use_short_slot = true;
5628221c 1629
471b3efd 1630 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 1631 bss_conf->use_cts_prot = use_protection;
1632 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 1633 }
7e9ed188 1634
d43c7b37 1635 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 1636 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 1637 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 1638 }
d9430a32 1639
7a5158ef 1640 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 1641 bss_conf->use_short_slot = use_short_slot;
1642 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 1643 }
1644
1645 return changed;
1646}
1647
f698d856 1648static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 1649 struct cfg80211_bss *cbss,
ae5eb026 1650 u32 bss_info_changed)
f0706e82 1651{
0c1ad2ca 1652 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 1653 struct ieee80211_local *local = sdata->local;
68542962 1654 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
d6f2da5b 1655
ae5eb026 1656 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 1657 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
50ae34a2 1658 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 1659
7ccc8bd7 1660 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
59c1ec2b 1661 beacon_loss_count * bss_conf->beacon_int));
7ccc8bd7 1662
0c1ad2ca
JB		 1663 sdata->u.mgd.associated = cbss;
1664 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 1665
17e4ec14
JM		 1666 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1667
488dd7b5 1668 if (sdata->vif.p2p) {
9caf0364 1669 const struct cfg80211_bss_ies *ies;
488dd7b5 1670
9caf0364
JB		 1671 rcu_read_lock();
1672 ies = rcu_dereference(cbss->ies);
1673 if (ies) {
9caf0364
JB		 1674 int ret;
1675
1676 ret = cfg80211_get_p2p_attr(
1677 ies->data, ies->len,
1678 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
67baf663
JD		 1679 (u8 *) &bss_conf->p2p_noa_attr,
1680 sizeof(bss_conf->p2p_noa_attr));
9caf0364 1681 if (ret >= 2) {
67baf663
JD		 1682 sdata->u.mgd.p2p_noa_index =
1683 bss_conf->p2p_noa_attr.index;
9caf0364 1684 bss_info_changed |= BSS_CHANGED_P2P_PS;
9caf0364 1685 }
488dd7b5 1686 }
9caf0364 1687 rcu_read_unlock();
488dd7b5
JB		 1688 }
1689
b291ba11 1690 /* just to be sure */
925e64c3 1691 ieee80211_stop_poll(sdata);
b291ba11 1692
9ac19a90 1693 ieee80211_led_assoc(local, 1);
9306102e 1694
c65dd147 1695 if (sdata->u.mgd.assoc_data->have_beacon) {
826262c3
JB		 1696 /*
1697 * If the AP is buggy we may get here with no DTIM period
1698 * known, so assume it's 1 which is the only safe assumption
1699 * in that case, although if the TIM IE is broken powersave
1700 * probably just won't work at all.
1701 */
1702 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
c65dd147 1703 bss_info_changed |= BSS_CHANGED_DTIM_PERIOD;
826262c3 1704 } else {
e5b900d2 1705 bss_conf->dtim_period = 0;
826262c3 1706 }
e5b900d2 1707
68542962 1708 bss_conf->assoc = 1;
9cef8737 1709
a97c13c3 1710 /* Tell the driver to monitor connection quality (if supported) */
ea086359 1711 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
68542962 1712 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 1713 bss_info_changed |= BSS_CHANGED_CQM;
1714
68542962 1715 /* Enable ARP filtering */
0f19b41e 1716 if (bss_conf->arp_addr_cnt)
68542962 1717 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
68542962 1718
ae5eb026 1719 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 1720
056508dc
JB		 1721 mutex_lock(&local->iflist_mtx);
1722 ieee80211_recalc_ps(local, -1);
1723 mutex_unlock(&local->iflist_mtx);
e0cb686f 1724
04ecd257 1725 ieee80211_recalc_smps(sdata);
ab095877
EP		 1726 ieee80211_recalc_ps_vif(sdata);
1727
8a5b33f5 1728 netif_tx_start_all_queues(sdata->dev);
9ac19a90 1729 netif_carrier_on(sdata->dev);
f0706e82
JB		 1730}
1731
e69e95db 1732static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
37ad3888
JB		 1733 u16 stype, u16 reason, bool tx,
1734 u8 *frame_buf)
aa458d17 1735{
46900298 1736 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17 1737 struct ieee80211_local *local = sdata->local;
3cc5240b 1738 u32 changed = 0;
aa458d17 1739
77fdaa12
JB		 1740 ASSERT_MGD_MTX(ifmgd);
1741
37ad3888
JB		 1742 if (WARN_ON_ONCE(tx && !frame_buf))
1743 return;
1744
b291ba11
JB		 1745 if (WARN_ON(!ifmgd->associated))
1746 return;
1747
79543d8e
DS		 1748 ieee80211_stop_poll(sdata);
1749
77fdaa12 1750 ifmgd->associated = NULL;
77fdaa12
JB		 1751
1752 /*
1753 * we need to commit the associated = NULL change because the
1754 * scan code uses that to determine whether this iface should
1755 * go to/wake up from powersave or not -- and could otherwise
1756 * wake the queues erroneously.
1757 */
1758 smp_mb();
1759
1760 /*
1761 * Thus, we can only afterwards stop the queues -- to account
1762 * for the case where another CPU is finishing a scan at this
1763 * time -- we don't want the scan code to enable queues.
1764 */
aa458d17 1765
8a5b33f5 1766 netif_tx_stop_all_queues(sdata->dev);
aa458d17
TW		 1767 netif_carrier_off(sdata->dev);
1768
88bc40e8
EP		 1769 /*
1770 * if we want to get out of ps before disassoc (why?) we have
1771 * to do it before sending disassoc, as otherwise the null-packet
1772 * won't be valid.
1773 */
1774 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1775 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1776 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1777 }
1778 local->ps_sdata = NULL;
1779
ab095877
EP		 1780 /* disable per-vif ps */
1781 ieee80211_recalc_ps_vif(sdata);
1782
f823981e
EP		 1783 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1784 if (tx)
39ecc01d 1785 ieee80211_flush_queues(local, sdata);
f823981e 1786
37ad3888
JB		 1787 /* deauthenticate/disassociate now */
1788 if (tx || frame_buf)
88a9e31c
EP		 1789 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
1790 reason, tx, frame_buf);
37ad3888
JB		 1791
1792 /* flush out frame */
1793 if (tx)
39ecc01d 1794 ieee80211_flush_queues(local, sdata);
37ad3888 1795
88a9e31c
EP		 1796 /* clear bssid only after building the needed mgmt frames */
1797 memset(ifmgd->bssid, 0, ETH_ALEN);
1798
37ad3888 1799 /* remove AP and TDLS peers */
051007d9 1800 sta_info_flush_defer(sdata);
37ad3888
JB		 1801
1802 /* finally reset all BSS / config parameters */
f5e5bf25
TW		 1803 changed |= ieee80211_reset_erp_info(sdata);
1804
f5e5bf25 1805 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 1806 changed |= BSS_CHANGED_ASSOC;
1807 sdata->vif.bss_conf.assoc = false;
f5e5bf25 1808
67baf663
JD		 1809 ifmgd->p2p_noa_index = -1;
1810 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
1811 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
488dd7b5 1812
dd5ecfea 1813 /* on the next assoc, re-program HT/VHT parameters */
ef96a842
BG		 1814 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1815 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
dd5ecfea
JB		 1816 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
1817 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
413ad50a 1818
1ea6f9c0 1819 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
a8302de9 1820
520eb820
KV		 1821 del_timer_sync(&local->dynamic_ps_timer);
1822 cancel_work_sync(&local->dynamic_ps_enable_work);
1823
68542962 1824 /* Disable ARP filtering */
0f19b41e 1825 if (sdata->vif.bss_conf.arp_addr_cnt)
68542962 1826 changed |= BSS_CHANGED_ARP_FILTER;
68542962 1827
3abead59
JB		 1828 sdata->vif.bss_conf.qos = false;
1829 changed |= BSS_CHANGED_QOS;
1830
0aaffa9b
JB		 1831 /* The BSSID (not really interesting) and HT changed */
1832 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 1833 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 1834
3abead59
JB		 1835 /* disassociated - set to defaults now */
1836 ieee80211_set_wmm_default(sdata, false);
1837
b9dcf712
JB		 1838 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1839 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1840 del_timer_sync(&sdata->u.mgd.timer);
1841 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2d9957cc 1842
826262c3
JB		 1843 sdata->vif.bss_conf.dtim_period = 0;
1844
028e8da0
JB		 1845 ifmgd->flags = 0;
1846 ieee80211_vif_release_channel(sdata);
aa458d17 1847}
f0706e82 1848
3cf335d5
KV		 1849void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1850 struct ieee80211_hdr *hdr)
1851{
1852 /*
1853 * We can postpone the mgd.timer whenever receiving unicast frames
1854 * from AP because we know that the connection is working both ways
1855 * at that time. But multicast frames (and hence also beacons) must
1856 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 1857 * data idle periods for sending the periodic probe request to the
1858 * AP we're connected to.
3cf335d5 1859 */
b291ba11
JB		 1860 if (is_multicast_ether_addr(hdr->addr1))
1861 return;
1862
be099e82 1863 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 1864}
f0706e82 1865
4e5ff376
FF		 1866static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1867{
1868 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
133d40f9 1869 struct ieee80211_local *local = sdata->local;
4e5ff376 1870
133d40f9 1871 mutex_lock(&local->mtx);
4e5ff376 1872 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
133d40f9
SG		 1873 IEEE80211_STA_CONNECTION_POLL))) {
1874 mutex_unlock(&local->mtx);
1875 return;
1876 }
4e5ff376 1877
925e64c3 1878 __ieee80211_stop_poll(sdata);
133d40f9
SG		 1879
1880 mutex_lock(&local->iflist_mtx);
1881 ieee80211_recalc_ps(local, -1);
1882 mutex_unlock(&local->iflist_mtx);
4e5ff376
FF		 1883
1884 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
133d40f9 1885 goto out;
4e5ff376
FF		 1886
1887 /*
1888 * We've received a probe response, but are not sure whether
1889 * we have or will be receiving any beacons or data, so let's
1890 * schedule the timers again, just in case.
1891 */
1892 ieee80211_sta_reset_beacon_monitor(sdata);
1893
1894 mod_timer(&ifmgd->conn_mon_timer,
1895 round_jiffies_up(jiffies +
1896 IEEE80211_CONNECTION_IDLE_TIME));
133d40f9 1897out:
133d40f9 1898 mutex_unlock(&local->mtx);
4e5ff376
FF		 1899}
1900
1901void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
04ac3c0e 1902 struct ieee80211_hdr *hdr, bool ack)
4e5ff376 1903{
75706d0e 1904 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF		 1905 return;
1906
4e5ff376
FF		 1907 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1908 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e 1909 if (ack)
cab1c7fd 1910 ieee80211_sta_reset_conn_monitor(sdata);
04ac3c0e
FF		 1911 else
1912 sdata->u.mgd.nullfunc_failed = true;
4e5ff376 1913 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
cab1c7fd 1914 return;
4e5ff376 1915 }
cab1c7fd
WD		 1916
1917 if (ack)
1918 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF		 1919}
1920
a43abf29
ML		 1921static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1922{
1923 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1924 const u8 *ssid;
f01a067d 1925 u8 *dst = ifmgd->associated->bssid;
180205bd 1926 u8 unicast_limit = max(1, max_probe_tries - 3);
f01a067d
LR		 1927
1928 /*
1929 * Try sending broadcast probe requests for the last three
1930 * probe requests after the first ones failed since some
1931 * buggy APs only support broadcast probe requests.
1932 */
1933 if (ifmgd->probe_send_count >= unicast_limit)
1934 dst = NULL;
a43abf29 1935
4e5ff376
FF		 1936 /*
1937 * When the hardware reports an accurate Tx ACK status, it's
1938 * better to send a nullfunc frame instead of a probe request,
1939 * as it will kick us off the AP quickly if we aren't associated
1940 * anymore. The timeout will be reset if the frame is ACKed by
1941 * the AP.
1942 */
992e68bf
SD		 1943 ifmgd->probe_send_count++;
1944
04ac3c0e
FF		 1945 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1946 ifmgd->nullfunc_failed = false;
4e5ff376 1947 ieee80211_send_nullfunc(sdata->local, sdata, 0);
04ac3c0e 1948 } else {
88c868c4
SG		 1949 int ssid_len;
1950
9caf0364 1951 rcu_read_lock();
4e5ff376 1952 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
88c868c4
SG		 1953 if (WARN_ON_ONCE(ssid == NULL))
1954 ssid_len = 0;
1955 else
1956 ssid_len = ssid[1];
1957
1958 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
1672c0e3 1959 0, (u32) -1, true, 0,
55de908a 1960 ifmgd->associated->channel, false);
9caf0364 1961 rcu_read_unlock();
4e5ff376 1962 }
a43abf29 1963
180205bd 1964 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
a43abf29 1965 run_again(ifmgd, ifmgd->probe_timeout);
f69b9c79 1966 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
39ecc01d 1967 ieee80211_flush_queues(sdata->local, sdata);
a43abf29
ML		 1968}
1969
b291ba11
JB		 1970static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1971 bool beacon)
04de8381 1972{
04de8381 1973 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 1974 bool already = false;
34bfc411 1975
9607e6b6 1976 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 1977 return;
1978
77fdaa12
JB		 1979 mutex_lock(&ifmgd->mtx);
1980
1981 if (!ifmgd->associated)
1982 goto out;
1983
133d40f9
SG		 1984 mutex_lock(&sdata->local->mtx);
1985
1986 if (sdata->local->tmp_channel || sdata->local->scanning) {
1987 mutex_unlock(&sdata->local->mtx);
1988 goto out;
1989 }
1990
a13fbe54 1991 if (beacon) {
bdcbd8e0 1992 mlme_dbg_ratelimited(sdata,
59c1ec2b
BG		 1993 "detected beacon loss from AP (missed %d beacons) - probing\n",
1994 beacon_loss_count);
bdcbd8e0 1995
a13fbe54
BG		 1996 ieee80211_cqm_rssi_notify(&sdata->vif,
1997 NL80211_CQM_RSSI_BEACON_LOSS_EVENT,
1998 GFP_KERNEL);
1999 }
04de8381 2000
b291ba11
JB		 2001 /*
2002 * The driver/our work has already reported this event or the
2003 * connection monitoring has kicked in and we have already sent
2004 * a probe request. Or maybe the AP died and the driver keeps
2005 * reporting until we disassociate...
2006 *
2007 * In either case we have to ignore the current call to this
2008 * function (except for setting the correct probe reason bit)
2009 * because otherwise we would reset the timer every time and
2010 * never check whether we received a probe response!
2011 */
2012 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2013 IEEE80211_STA_CONNECTION_POLL))
2014 already = true;
2015
2016 if (beacon)
2017 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
2018 else
2019 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2020
133d40f9
SG		 2021 mutex_unlock(&sdata->local->mtx);
2022
b291ba11
JB		 2023 if (already)
2024 goto out;
2025
4e751843
JB		 2026 mutex_lock(&sdata->local->iflist_mtx);
2027 ieee80211_recalc_ps(sdata->local, -1);
2028 mutex_unlock(&sdata->local->iflist_mtx);
2029
a43abf29
ML		 2030 ifmgd->probe_send_count = 0;
2031 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12
JB		 2032 out:
2033 mutex_unlock(&ifmgd->mtx);
04de8381
KV		 2034}
2035
a619a4c0
JO		 2036struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2037 struct ieee80211_vif *vif)
2038{
2039 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2040 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d9b3b28b 2041 struct cfg80211_bss *cbss;
a619a4c0
JO		 2042 struct sk_buff *skb;
2043 const u8 *ssid;
88c868c4 2044 int ssid_len;
a619a4c0
JO		 2045
2046 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2047 return NULL;
2048
2049 ASSERT_MGD_MTX(ifmgd);
2050
d9b3b28b
EP		 2051 if (ifmgd->associated)
2052 cbss = ifmgd->associated;
2053 else if (ifmgd->auth_data)
2054 cbss = ifmgd->auth_data->bss;
2055 else if (ifmgd->assoc_data)
2056 cbss = ifmgd->assoc_data->bss;
2057 else
a619a4c0
JO		 2058 return NULL;
2059
9caf0364 2060 rcu_read_lock();
d9b3b28b 2061 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
88c868c4
SG		 2062 if (WARN_ON_ONCE(ssid == NULL))
2063 ssid_len = 0;
2064 else
2065 ssid_len = ssid[1];
2066
d9b3b28b 2067 skb = ieee80211_build_probe_req(sdata, cbss->bssid,
55de908a 2068 (u32) -1, cbss->channel,
6b77863b 2069 ssid + 2, ssid_len,
85a237fe 2070 NULL, 0, true);
9caf0364 2071 rcu_read_unlock();
a619a4c0
JO		 2072
2073 return skb;
2074}
2075EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2076
eef9e54c 2077static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
1e4dcd01
JO		 2078{
2079 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 2080 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
1e4dcd01
JO		 2081
2082 mutex_lock(&ifmgd->mtx);
2083 if (!ifmgd->associated) {
2084 mutex_unlock(&ifmgd->mtx);
2085 return;
2086 }
2087
37ad3888
JB		 2088 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2089 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
eef9e54c 2090 true, frame_buf);
882a7c69 2091 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
5b36ebd8 2092 ieee80211_wake_queues_by_reason(&sdata->local->hw,
445ea4e8 2093 IEEE80211_MAX_QUEUE_MAP,
5b36ebd8 2094 IEEE80211_QUEUE_STOP_REASON_CSA);
1e4dcd01 2095 mutex_unlock(&ifmgd->mtx);
7da7cc1d 2096
1e4dcd01
JO		 2097 /*
2098 * must be outside lock due to cfg80211,
2099 * but that's not a problem.
2100 */
6ae16775 2101 cfg80211_send_deauth(sdata->dev, frame_buf, IEEE80211_DEAUTH_FRAME_LEN);
1e4dcd01
JO		 2102}
2103
cc74c0c7 2104static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 2105{
2106 struct ieee80211_sub_if_data *sdata =
2107 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 2108 u.mgd.beacon_connection_loss_work);
a85e1d55
PS		 2109 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2110 struct sta_info *sta;
2111
2112 if (ifmgd->associated) {
30fa9047 2113 rcu_read_lock();
a85e1d55
PS		 2114 sta = sta_info_get(sdata, ifmgd->bssid);
2115 if (sta)
2116 sta->beacon_loss_count++;
30fa9047 2117 rcu_read_unlock();
a85e1d55 2118 }
b291ba11 2119
682bd38b 2120 if (ifmgd->connection_loss) {
882a7c69
JB		 2121 sdata_info(sdata, "Connection to AP %pM lost\n",
2122 ifmgd->bssid);
eef9e54c 2123 __ieee80211_disconnect(sdata);
882a7c69 2124 } else {
1e4dcd01 2125 ieee80211_mgd_probe_ap(sdata, true);
882a7c69
JB		 2126 }
2127}
2128
2129static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2130{
2131 struct ieee80211_sub_if_data *sdata =
2132 container_of(work, struct ieee80211_sub_if_data,
2133 u.mgd.csa_connection_drop_work);
2134
eef9e54c 2135 __ieee80211_disconnect(sdata);
b291ba11
JB		 2136}
2137
04de8381
KV		 2138void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2139{
2140 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 2141 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 2142
b5878a2d
JB		 2143 trace_api_beacon_loss(sdata);
2144
1e4dcd01 2145 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
682bd38b 2146 sdata->u.mgd.connection_loss = false;
1e4dcd01 2147 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 2148}
2149EXPORT_SYMBOL(ieee80211_beacon_loss);
2150
1e4dcd01
JO		 2151void ieee80211_connection_loss(struct ieee80211_vif *vif)
2152{
2153 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2154 struct ieee80211_hw *hw = &sdata->local->hw;
2155
b5878a2d
JB		 2156 trace_api_connection_loss(sdata);
2157
682bd38b 2158 sdata->u.mgd.connection_loss = true;
1e4dcd01
JO		 2159 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2160}
2161EXPORT_SYMBOL(ieee80211_connection_loss);
2162
2163
66e67e41
JB		 2164static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2165 bool assoc)
2166{
2167 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2168
2169 lockdep_assert_held(&sdata->u.mgd.mtx);
2170
66e67e41
JB		 2171 if (!assoc) {
2172 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2173
2174 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2175 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
028e8da0 2176 sdata->u.mgd.flags = 0;
55de908a 2177 ieee80211_vif_release_channel(sdata);
66e67e41
JB		 2178 }
2179
5b112d3d 2180 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
66e67e41
JB		 2181 kfree(auth_data);
2182 sdata->u.mgd.auth_data = NULL;
2183}
2184
2185static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2186 struct ieee80211_mgmt *mgmt, size_t len)
2187{
1672c0e3 2188 struct ieee80211_local *local = sdata->local;
66e67e41
JB		 2189 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2190 u8 *pos;
2191 struct ieee802_11_elems elems;
1672c0e3 2192 u32 tx_flags = 0;
66e67e41
JB		 2193
2194 pos = mgmt->u.auth.variable;
2195 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2196 if (!elems.challenge)
2197 return;
2198 auth_data->expected_transaction = 4;
a1845fc7 2199 drv_mgd_prepare_tx(sdata->local, sdata);
1672c0e3
JB		 2200 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2201 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2202 IEEE80211_TX_INTFL_MLME_CONN_TX;
700e8ea6 2203 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
66e67e41
JB		 2204 elems.challenge - 2, elems.challenge_len + 2,
2205 auth_data->bss->bssid, auth_data->bss->bssid,
2206 auth_data->key, auth_data->key_len,
1672c0e3 2207 auth_data->key_idx, tx_flags);
66e67e41
JB		 2208}
2209
2210static enum rx_mgmt_action __must_check
2211ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2212 struct ieee80211_mgmt *mgmt, size_t len)
2213{
2214 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2215 u8 bssid[ETH_ALEN];
2216 u16 auth_alg, auth_transaction, status_code;
2217 struct sta_info *sta;
2218
2219 lockdep_assert_held(&ifmgd->mtx);
2220
2221 if (len < 24 + 6)
2222 return RX_MGMT_NONE;
2223
2224 if (!ifmgd->auth_data || ifmgd->auth_data->done)
2225 return RX_MGMT_NONE;
2226
2227 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2228
b203ca39 2229 if (!ether_addr_equal(bssid, mgmt->bssid))
66e67e41
JB		 2230 return RX_MGMT_NONE;
2231
2232 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2233 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2234 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2235
2236 if (auth_alg != ifmgd->auth_data->algorithm ||
0f4126e8
JM		 2237 auth_transaction != ifmgd->auth_data->expected_transaction) {
2238 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2239 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2240 auth_transaction,
2241 ifmgd->auth_data->expected_transaction);
66e67e41 2242 return RX_MGMT_NONE;
0f4126e8 2243 }
66e67e41
JB		 2244
2245 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2246 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2247 mgmt->sa, status_code);
dac211ec
EP		 2248 ieee80211_destroy_auth_data(sdata, false);
2249 return RX_MGMT_CFG80211_RX_AUTH;
66e67e41
JB		 2250 }
2251
2252 switch (ifmgd->auth_data->algorithm) {
2253 case WLAN_AUTH_OPEN:
2254 case WLAN_AUTH_LEAP:
2255 case WLAN_AUTH_FT:
6b8ece3a 2256 case WLAN_AUTH_SAE:
66e67e41
JB		 2257 break;
2258 case WLAN_AUTH_SHARED_KEY:
2259 if (ifmgd->auth_data->expected_transaction != 4) {
2260 ieee80211_auth_challenge(sdata, mgmt, len);
2261 /* need another frame */
2262 return RX_MGMT_NONE;
2263 }
2264 break;
2265 default:
2266 WARN_ONCE(1, "invalid auth alg %d",
2267 ifmgd->auth_data->algorithm);
2268 return RX_MGMT_NONE;
2269 }
2270
bdcbd8e0 2271 sdata_info(sdata, "authenticated\n");
66e67e41
JB		 2272 ifmgd->auth_data->done = true;
2273 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
89afe614 2274 ifmgd->auth_data->timeout_started = true;
66e67e41
JB		 2275 run_again(ifmgd, ifmgd->auth_data->timeout);
2276
6b8ece3a
JM		 2277 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2278 ifmgd->auth_data->expected_transaction != 2) {
2279 /*
2280 * Report auth frame to user space for processing since another
2281 * round of Authentication frames is still needed.
2282 */
2283 return RX_MGMT_CFG80211_RX_AUTH;
2284 }
2285
66e67e41
JB		 2286 /* move station state to auth */
2287 mutex_lock(&sdata->local->sta_mtx);
2288 sta = sta_info_get(sdata, bssid);
2289 if (!sta) {
2290 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2291 goto out_err;
2292 }
2293 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
bdcbd8e0 2294 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
66e67e41
JB		 2295 goto out_err;
2296 }
2297 mutex_unlock(&sdata->local->sta_mtx);
2298
2299 return RX_MGMT_CFG80211_RX_AUTH;
2300 out_err:
2301 mutex_unlock(&sdata->local->sta_mtx);
2302 /* ignore frame -- wait for timeout */
2303 return RX_MGMT_NONE;
2304}
2305
2306
77fdaa12
JB		 2307static enum rx_mgmt_action __must_check
2308ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
77fdaa12 2309 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2310{
46900298 2311 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 2312 const u8 *bssid = NULL;
f0706e82
JB		 2313 u16 reason_code;
2314
66e67e41
JB		 2315 lockdep_assert_held(&ifmgd->mtx);
2316
f4ea83dd 2317 if (len < 24 + 2)
77fdaa12 2318 return RX_MGMT_NONE;
f0706e82 2319
66e67e41 2320 if (!ifmgd->associated ||
b203ca39 2321 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
66e67e41 2322 return RX_MGMT_NONE;
77fdaa12 2323
0c1ad2ca 2324 bssid = ifmgd->associated->bssid;
f0706e82
JB		 2325
2326 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2327
bdcbd8e0
JB		 2328 sdata_info(sdata, "deauthenticated from %pM (Reason: %u)\n",
2329 bssid, reason_code);
77fdaa12 2330
37ad3888
JB		 2331 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2332
77fdaa12 2333 return RX_MGMT_CFG80211_DEAUTH;
f0706e82
JB		 2334}
2335
2336
77fdaa12
JB		 2337static enum rx_mgmt_action __must_check
2338ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2339 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2340{
46900298 2341 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 2342 u16 reason_code;
2343
66e67e41 2344 lockdep_assert_held(&ifmgd->mtx);
77fdaa12 2345
66e67e41 2346 if (len < 24 + 2)
77fdaa12
JB		 2347 return RX_MGMT_NONE;
2348
66e67e41 2349 if (!ifmgd->associated ||
b203ca39 2350 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
77fdaa12 2351 return RX_MGMT_NONE;
f0706e82
JB		 2352
2353 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2354
bdcbd8e0
JB		 2355 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2356 mgmt->sa, reason_code);
f0706e82 2357
37ad3888
JB		 2358 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2359
77fdaa12 2360 return RX_MGMT_CFG80211_DISASSOC;
f0706e82
JB		 2361}
2362
c74d084f
CL		 2363static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2364 u8 *supp_rates, unsigned int supp_rates_len,
2365 u32 *rates, u32 *basic_rates,
2366 bool *have_higher_than_11mbit,
2367 int *min_rate, int *min_rate_index)
2368{
2369 int i, j;
2370
2371 for (i = 0; i < supp_rates_len; i++) {
2372 int rate = (supp_rates[i] & 0x7f) * 5;
2373 bool is_basic = !!(supp_rates[i] & 0x80);
2374
2375 if (rate > 110)
2376 *have_higher_than_11mbit = true;
2377
2378 /*
2379 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2380 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2381 *
2382 * Note: Even through the membership selector and the basic
2383 * rate flag share the same bit, they are not exactly
2384 * the same.
2385 */
2386 if (!!(supp_rates[i] & 0x80) &&
2387 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2388 continue;
2389
2390 for (j = 0; j < sband->n_bitrates; j++) {
2391 if (sband->bitrates[j].bitrate == rate) {
2392 *rates |= BIT(j);
2393 if (is_basic)
2394 *basic_rates |= BIT(j);
2395 if (rate < *min_rate) {
2396 *min_rate = rate;
2397 *min_rate_index = j;
2398 }
2399 break;
2400 }
2401 }
2402 }
2403}
f0706e82 2404
66e67e41
JB		 2405static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2406 bool assoc)
2407{
2408 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2409
2410 lockdep_assert_held(&sdata->u.mgd.mtx);
2411
66e67e41
JB		 2412 if (!assoc) {
2413 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2414
2415 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2416 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
028e8da0 2417 sdata->u.mgd.flags = 0;
55de908a 2418 ieee80211_vif_release_channel(sdata);
66e67e41
JB		 2419 }
2420
2421 kfree(assoc_data);
2422 sdata->u.mgd.assoc_data = NULL;
2423}
2424
2425static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2426 struct cfg80211_bss *cbss,
af6b6374 2427 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2428{
46900298 2429 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 2430 struct ieee80211_local *local = sdata->local;
8318d78a 2431 struct ieee80211_supported_band *sband;
f0706e82 2432 struct sta_info *sta;
af6b6374 2433 u8 *pos;
af6b6374 2434 u16 capab_info, aid;
f0706e82 2435 struct ieee802_11_elems elems;
bda3933a 2436 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
ae5eb026 2437 u32 changed = 0;
c74d084f 2438 int err;
f0706e82 2439
af6b6374 2440 /* AssocResp and ReassocResp have identical structure */
f0706e82 2441
f0706e82 2442 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 2443 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 2444
1dd84aa2 2445 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
bdcbd8e0
JB		 2446 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2447 aid);
1dd84aa2
JB		 2448 aid &= ~(BIT(15) | BIT(14));
2449
05cb9108
JB		 2450 ifmgd->broken_ap = false;
2451
2452 if (aid == 0 || aid > IEEE80211_MAX_AID) {
bdcbd8e0
JB		 2453 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2454 aid);
05cb9108
JB		 2455 aid = 0;
2456 ifmgd->broken_ap = true;
2457 }
2458
af6b6374
JB		 2459 pos = mgmt->u.assoc_resp.variable;
2460 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2461
f0706e82 2462 if (!elems.supp_rates) {
bdcbd8e0 2463 sdata_info(sdata, "no SuppRates element in AssocResp\n");
af6b6374 2464 return false;
f0706e82
JB		 2465 }
2466
46900298 2467 ifmgd->aid = aid;
f0706e82 2468
30eb1dc2
JB		 2469 /*
2470 * We previously checked these in the beacon/probe response, so
2471 * they should be present here. This is just a safety net.
2472 */
2473 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2474 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2475 sdata_info(sdata,
2476 "HT AP is missing WMM params or HT capability/operation in AssocResp\n");
2477 return false;
2478 }
2479
2480 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2481 (!elems.vht_cap_elem || !elems.vht_operation)) {
2482 sdata_info(sdata,
2483 "VHT AP is missing VHT capability/operation in AssocResp\n");
2484 return false;
2485 }
2486
2a33bee2
GE		 2487 mutex_lock(&sdata->local->sta_mtx);
2488 /*
2489 * station info was already allocated and inserted before
2490 * the association and should be available to us
2491 */
7852e361 2492 sta = sta_info_get(sdata, cbss->bssid);
2a33bee2
GE		 2493 if (WARN_ON(!sta)) {
2494 mutex_unlock(&sdata->local->sta_mtx);
af6b6374 2495 return false;
77fdaa12 2496 }
05e5e883 2497
55de908a 2498 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
f709fc69 2499
30eb1dc2 2500 /* Set up internal HT/VHT capabilities */
a8243b72 2501 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
ef96a842 2502 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
e1a0c6b3 2503 elems.ht_cap_elem, sta);
64f68e5d 2504
818255ea
MP		 2505 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2506 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
4a34215e 2507 elems.vht_cap_elem, sta);
818255ea 2508
30eb1dc2
JB		 2509 /*
2510 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
2511 * in their association response, so ignore that data for our own
2512 * configuration. If it changed since the last beacon, we'll get the
2513 * next beacon and update then.
2514 */
1128958d 2515
bee7f586
JB		 2516 /*
2517 * If an operating mode notification IE is present, override the
2518 * NSS calculation (that would be done in rate_control_rate_init())
2519 * and use the # of streams from that element.
2520 */
2521 if (elems.opmode_notif &&
2522 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
2523 u8 nss;
2524
2525 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
2526 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
2527 nss += 1;
2528 sta->sta.rx_nss = nss;
2529 }
2530
4b7679a5 2531 rate_control_rate_init(sta);
f0706e82 2532
46900298 2533 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
c2c98fde 2534 set_sta_flag(sta, WLAN_STA_MFP);
5394af4d 2535
ddf4ac53 2536 if (elems.wmm_param)
c2c98fde 2537 set_sta_flag(sta, WLAN_STA_WME);
ddf4ac53 2538
3e4d40fa 2539 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
c8987876
JB		 2540 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2541 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2542 if (err) {
bdcbd8e0
JB		 2543 sdata_info(sdata,
2544 "failed to move station %pM to desired state\n",
2545 sta->sta.addr);
c8987876
JB		 2546 WARN_ON(__sta_info_destroy(sta));
2547 mutex_unlock(&sdata->local->sta_mtx);
2548 return false;
2549 }
2550
7852e361 2551 mutex_unlock(&sdata->local->sta_mtx);
ddf4ac53 2552
f2176d72
JO		 2553 /*
2554 * Always handle WMM once after association regardless
2555 * of the first value the AP uses. Setting -1 here has
2556 * that effect because the AP values is an unsigned
2557 * 4-bit value.
2558 */
2559 ifmgd->wmm_last_param_set = -1;
2560
ddf4ac53 2561 if (elems.wmm_param)
4ced3f74 2562 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 2563 elems.wmm_param_len);
aa837e1d 2564 else
3abead59
JB		 2565 ieee80211_set_wmm_default(sdata, false);
2566 changed |= BSS_CHANGED_QOS;
f0706e82 2567
60f8b39c
JB		 2568 /* set AID and assoc capability,
2569 * ieee80211_set_associated() will tell the driver */
2570 bss_conf->aid = aid;
2571 bss_conf->assoc_capability = capab_info;
0c1ad2ca 2572 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 2573
d524215f
FF		 2574 /*
2575 * If we're using 4-addr mode, let the AP know that we're
2576 * doing so, so that it can create the STA VLAN on its side
2577 */
2578 if (ifmgd->use_4addr)
2579 ieee80211_send_4addr_nullfunc(local, sdata);
2580
15b7b062 2581 /*
b291ba11
JB		 2582 * Start timer to probe the connection to the AP now.
2583 * Also start the timer that will detect beacon loss.
15b7b062 2584 */
b291ba11 2585 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 2586 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 2587
af6b6374 2588 return true;
f0706e82
JB		 2589}
2590
66e67e41
JB		 2591static enum rx_mgmt_action __must_check
2592ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2593 struct ieee80211_mgmt *mgmt, size_t len,
2594 struct cfg80211_bss **bss)
2595{
2596 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2597 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2598 u16 capab_info, status_code, aid;
2599 struct ieee802_11_elems elems;
2600 u8 *pos;
2601 bool reassoc;
2602
2603 lockdep_assert_held(&ifmgd->mtx);
2604
2605 if (!assoc_data)
2606 return RX_MGMT_NONE;
b203ca39 2607 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
66e67e41
JB		 2608 return RX_MGMT_NONE;
2609
2610 /*
2611 * AssocResp and ReassocResp have identical structure, so process both
2612 * of them in this function.
2613 */
2614
2615 if (len < 24 + 6)
2616 return RX_MGMT_NONE;
2617
2618 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2619 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2620 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2621 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2622
bdcbd8e0
JB		 2623 sdata_info(sdata,
2624 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2625 reassoc ? "Rea" : "A", mgmt->sa,
2626 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
66e67e41
JB		 2627
2628 pos = mgmt->u.assoc_resp.variable;
2629 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2630
2631 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
2632 elems.timeout_int && elems.timeout_int_len == 5 &&
2633 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
2634 u32 tu, ms;
2635 tu = get_unaligned_le32(elems.timeout_int + 1);
2636 ms = tu * 1024 / 1000;
bdcbd8e0
JB		 2637 sdata_info(sdata,
2638 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2639 mgmt->sa, tu, ms);
66e67e41 2640 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
89afe614 2641 assoc_data->timeout_started = true;
66e67e41
JB		 2642 if (ms > IEEE80211_ASSOC_TIMEOUT)
2643 run_again(ifmgd, assoc_data->timeout);
2644 return RX_MGMT_NONE;
2645 }
2646
2647 *bss = assoc_data->bss;
2648
2649 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2650 sdata_info(sdata, "%pM denied association (code=%d)\n",
2651 mgmt->sa, status_code);
66e67e41
JB		 2652 ieee80211_destroy_assoc_data(sdata, false);
2653 } else {
66e67e41
JB		 2654 if (!ieee80211_assoc_success(sdata, *bss, mgmt, len)) {
2655 /* oops -- internal error -- send timeout for now */
10a9109f 2656 ieee80211_destroy_assoc_data(sdata, false);
5b112d3d 2657 cfg80211_put_bss(sdata->local->hw.wiphy, *bss);
66e67e41
JB		 2658 return RX_MGMT_CFG80211_ASSOC_TIMEOUT;
2659 }
635d999f 2660 sdata_info(sdata, "associated\n");
79ebfb85
JB		 2661
2662 /*
2663 * destroy assoc_data afterwards, as otherwise an idle
2664 * recalc after assoc_data is NULL but before associated
2665 * is set can cause the interface to go idle
2666 */
2667 ieee80211_destroy_assoc_data(sdata, true);
66e67e41
JB		 2668 }
2669
2670 return RX_MGMT_CFG80211_RX_ASSOC;
2671}
8e3c1b77 2672
98c8fccf 2673static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
8e3c1b77 2674 struct ieee80211_mgmt *mgmt, size_t len,
98c8fccf 2675 struct ieee80211_rx_status *rx_status,
d45c4172 2676 struct ieee802_11_elems *elems)
98c8fccf
JB		 2677{
2678 struct ieee80211_local *local = sdata->local;
2679 int freq;
c2b13452 2680 struct ieee80211_bss *bss;
98c8fccf 2681 struct ieee80211_channel *channel;
56007a02
JB		 2682 bool need_ps = false;
2683
826262c3
JB		 2684 if ((sdata->u.mgd.associated &&
2685 ether_addr_equal(mgmt->bssid, sdata->u.mgd.associated->bssid)) ||
2686 (sdata->u.mgd.assoc_data &&
2687 ether_addr_equal(mgmt->bssid,
2688 sdata->u.mgd.assoc_data->bss->bssid))) {
56007a02 2689 /* not previously set so we may need to recalc */
826262c3
JB		 2690 need_ps = sdata->u.mgd.associated && !sdata->u.mgd.dtim_period;
2691
2692 if (elems->tim && !elems->parse_error) {
4a3cb702 2693 const struct ieee80211_tim_ie *tim_ie = elems->tim;
826262c3
JB		 2694 sdata->u.mgd.dtim_period = tim_ie->dtim_period;
2695 }
56007a02 2696 }
98c8fccf 2697
1cd8e88e 2698 if (elems->ds_params)
59eb21a6
BR		 2699 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
2700 rx_status->band);
98c8fccf
JB		 2701 else
2702 freq = rx_status->freq;
2703
2704 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2705
2706 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2707 return;
2708
98c8fccf 2709 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
d45c4172 2710 channel);
77fdaa12
JB		 2711 if (bss)
2712 ieee80211_rx_bss_put(local, bss);
2713
2714 if (!sdata->u.mgd.associated)
98c8fccf
JB		 2715 return;
2716
56007a02
JB		 2717 if (need_ps) {
2718 mutex_lock(&local->iflist_mtx);
2719 ieee80211_recalc_ps(local, -1);
2720 mutex_unlock(&local->iflist_mtx);
2721 }
2722
5bc1420b
JB		 2723 if (elems->ch_switch_ie &&
2724 memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid, ETH_ALEN) == 0)
2725 ieee80211_sta_process_chanswitch(sdata, elems->ch_switch_ie,
5ce6e438 2726 bss, rx_status->mactime);
f0706e82
JB		 2727}
2728
2729
f698d856 2730static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 2731 struct sk_buff *skb)
f0706e82 2732{
af6b6374 2733 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 2734 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 2735 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2736 size_t baselen, len = skb->len;
ae6a44e3
EK		 2737 struct ieee802_11_elems elems;
2738
15b7b062
KV		 2739 ifmgd = &sdata->u.mgd;
2740
77fdaa12
JB		 2741 ASSERT_MGD_MTX(ifmgd);
2742
b203ca39 2743 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
8e7cdbb6
TW		 2744 return; /* ignore ProbeResp to foreign address */
2745
ae6a44e3
EK		 2746 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2747 if (baselen > len)
2748 return;
2749
2750 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2751 &elems);
2752
d45c4172 2753 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
9859b81e 2754
77fdaa12 2755 if (ifmgd->associated &&
b203ca39 2756 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
4e5ff376 2757 ieee80211_reset_ap_probe(sdata);
66e67e41
JB		 2758
2759 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
b203ca39 2760 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
66e67e41 2761 /* got probe response, continue with auth */
bdcbd8e0 2762 sdata_info(sdata, "direct probe responded\n");
66e67e41
JB		 2763 ifmgd->auth_data->tries = 0;
2764 ifmgd->auth_data->timeout = jiffies;
89afe614 2765 ifmgd->auth_data->timeout_started = true;
66e67e41
JB		 2766 run_again(ifmgd, ifmgd->auth_data->timeout);
2767 }
f0706e82
JB		 2768}
2769
d91f36db
JB		 2770/*
2771 * This is the canonical list of information elements we care about,
2772 * the filter code also gives us all changes to the Microsoft OUI
2773 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2774 *
2775 * We implement beacon filtering in software since that means we can
2776 * avoid processing the frame here and in cfg80211, and userspace
2777 * will not be able to tell whether the hardware supports it or not.
2778 *
2779 * XXX: This list needs to be dynamic -- userspace needs to be able to
2780 * add items it requires. It also needs to be able to tell us to
2781 * look out for other vendor IEs.
2782 */
2783static const u64 care_about_ies =
1d4df3a5
JB		 2784 (1ULL << WLAN_EID_COUNTRY) |
2785 (1ULL << WLAN_EID_ERP_INFO) |
2786 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2787 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2788 (1ULL << WLAN_EID_HT_CAPABILITY) |
074d46d1 2789 (1ULL << WLAN_EID_HT_OPERATION);
d91f36db 2790
30eb1dc2
JB		 2791static enum rx_mgmt_action
2792ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
2793 struct ieee80211_mgmt *mgmt, size_t len,
2794 u8 *deauth_buf, struct ieee80211_rx_status *rx_status)
f0706e82 2795{
d91f36db 2796 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 2797 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 2798 size_t baselen;
2799 struct ieee802_11_elems elems;
f698d856 2800 struct ieee80211_local *local = sdata->local;
55de908a
JB		 2801 struct ieee80211_chanctx_conf *chanctx_conf;
2802 struct ieee80211_channel *chan;
bee7f586 2803 struct sta_info *sta;
471b3efd 2804 u32 changed = 0;
f87ad637 2805 bool erp_valid;
7a5158ef 2806 u8 erp_value = 0;
d91f36db 2807 u32 ncrc;
77fdaa12
JB		 2808 u8 *bssid;
2809
66e67e41 2810 lockdep_assert_held(&ifmgd->mtx);
f0706e82 2811
ae6a44e3
EK		 2812 /* Process beacon from the current BSS */
2813 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2814 if (baselen > len)
30eb1dc2 2815 return RX_MGMT_NONE;
ae6a44e3 2816
55de908a
JB		 2817 rcu_read_lock();
2818 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2819 if (!chanctx_conf) {
2820 rcu_read_unlock();
30eb1dc2 2821 return RX_MGMT_NONE;
55de908a
JB		 2822 }
2823
4bf88530 2824 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
55de908a 2825 rcu_read_unlock();
30eb1dc2 2826 return RX_MGMT_NONE;
55de908a 2827 }
4bf88530 2828 chan = chanctx_conf->def.chan;
55de908a 2829 rcu_read_unlock();
f0706e82 2830
c65dd147 2831 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
b203ca39 2832 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
66e67e41
JB		 2833 ieee802_11_parse_elems(mgmt->u.beacon.variable,
2834 len - baselen, &elems);
77fdaa12 2835
d45c4172 2836 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
66e67e41 2837 ifmgd->assoc_data->have_beacon = true;
c65dd147 2838 ifmgd->assoc_data->need_beacon = false;
ef429dad
JB		 2839 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
2840 sdata->vif.bss_conf.sync_tsf =
2841 le64_to_cpu(mgmt->u.beacon.timestamp);
2842 sdata->vif.bss_conf.sync_device_ts =
2843 rx_status->device_timestamp;
2844 if (elems.tim)
2845 sdata->vif.bss_conf.sync_dtim_count =
2846 elems.tim->dtim_count;
2847 else
2848 sdata->vif.bss_conf.sync_dtim_count = 0;
2849 }
66e67e41
JB		 2850 /* continue assoc process */
2851 ifmgd->assoc_data->timeout = jiffies;
89afe614 2852 ifmgd->assoc_data->timeout_started = true;
66e67e41 2853 run_again(ifmgd, ifmgd->assoc_data->timeout);
30eb1dc2 2854 return RX_MGMT_NONE;
66e67e41 2855 }
77fdaa12 2856
66e67e41 2857 if (!ifmgd->associated ||
b203ca39 2858 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
30eb1dc2 2859 return RX_MGMT_NONE;
66e67e41 2860 bssid = ifmgd->associated->bssid;
f0706e82 2861
17e4ec14
JM		 2862 /* Track average RSSI from the Beacon frames of the current AP */
2863 ifmgd->last_beacon_signal = rx_status->signal;
2864 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
2865 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3ba06c6f 2866 ifmgd->ave_beacon_signal = rx_status->signal * 16;
17e4ec14 2867 ifmgd->last_cqm_event_signal = 0;
391a200a 2868 ifmgd->count_beacon_signal = 1;
615f7b9b 2869 ifmgd->last_ave_beacon_signal = 0;
17e4ec14
JM		 2870 } else {
2871 ifmgd->ave_beacon_signal =
2872 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
2873 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
2874 ifmgd->ave_beacon_signal) / 16;
391a200a 2875 ifmgd->count_beacon_signal++;
17e4ec14 2876 }
615f7b9b
MV		 2877
2878 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
2879 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
2880 int sig = ifmgd->ave_beacon_signal;
2881 int last_sig = ifmgd->last_ave_beacon_signal;
2882
2883 /*
2884 * if signal crosses either of the boundaries, invoke callback
2885 * with appropriate parameters
2886 */
2887 if (sig > ifmgd->rssi_max_thold &&
2888 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
2889 ifmgd->last_ave_beacon_signal = sig;
887da917 2890 drv_rssi_callback(local, sdata, RSSI_EVENT_HIGH);
615f7b9b
MV		 2891 } else if (sig < ifmgd->rssi_min_thold &&
2892 (last_sig >= ifmgd->rssi_max_thold ||
2893 last_sig == 0)) {
2894 ifmgd->last_ave_beacon_signal = sig;
887da917 2895 drv_rssi_callback(local, sdata, RSSI_EVENT_LOW);
615f7b9b
MV		 2896 }
2897 }
2898
17e4ec14 2899 if (bss_conf->cqm_rssi_thold &&
391a200a 2900 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
ea086359 2901 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
17e4ec14
JM		 2902 int sig = ifmgd->ave_beacon_signal / 16;
2903 int last_event = ifmgd->last_cqm_event_signal;
2904 int thold = bss_conf->cqm_rssi_thold;
2905 int hyst = bss_conf->cqm_rssi_hyst;
2906 if (sig < thold &&
2907 (last_event == 0 || sig < last_event - hyst)) {
2908 ifmgd->last_cqm_event_signal = sig;
2909 ieee80211_cqm_rssi_notify(
2910 &sdata->vif,
2911 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
2912 GFP_KERNEL);
2913 } else if (sig > thold &&
2914 (last_event == 0 || sig > last_event + hyst)) {
2915 ifmgd->last_cqm_event_signal = sig;
2916 ieee80211_cqm_rssi_notify(
2917 &sdata->vif,
2918 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
2919 GFP_KERNEL);
2920 }
2921 }
2922
b291ba11 2923 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
bdcbd8e0 2924 mlme_dbg_ratelimited(sdata,
112c31f0 2925 "cancelling AP probe due to a received beacon\n");
925e64c3 2926 mutex_lock(&local->mtx);
b291ba11 2927 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
925e64c3
SG		 2928 ieee80211_run_deferred_scan(local);
2929 mutex_unlock(&local->mtx);
2930
4e751843
JB		 2931 mutex_lock(&local->iflist_mtx);
2932 ieee80211_recalc_ps(local, -1);
2933 mutex_unlock(&local->iflist_mtx);
92778180
JM		 2934 }
2935
b291ba11
JB		 2936 /*
2937 * Push the beacon loss detection into the future since
2938 * we are processing a beacon from the AP just now.
2939 */
d3a910a8 2940 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 2941
d91f36db
JB		 2942 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
2943 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
2944 len - baselen, &elems,
2945 care_about_ies, ncrc);
2946
25c9c875 2947 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
f87ad637
RR		 2948 bool directed_tim = ieee80211_check_tim(elems.tim,
2949 elems.tim_len,
2950 ifmgd->aid);
1fb3606b 2951 if (directed_tim) {
572e0012 2952 if (local->hw.conf.dynamic_ps_timeout > 0) {
70b12f26
RW		 2953 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2954 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2955 ieee80211_hw_config(local,
2956 IEEE80211_CONF_CHANGE_PS);
2957 }
572e0012 2958 ieee80211_send_nullfunc(local, sdata, 0);
6f0756a3 2959 } else if (!local->pspolling && sdata->u.mgd.powersave) {
572e0012
KV		 2960 local->pspolling = true;
2961
2962 /*
2963 * Here is assumed that the driver will be
2964 * able to send ps-poll frame and receive a
2965 * response even though power save mode is
2966 * enabled, but some drivers might require
2967 * to disable power save here. This needs
2968 * to be investigated.
2969 */
2970 ieee80211_send_pspoll(local, sdata);
2971 }
a97b77b9
VN		 2972 }
2973 }
7a5158ef 2974
488dd7b5 2975 if (sdata->vif.p2p) {
67baf663 2976 struct ieee80211_p2p_noa_attr noa = {};
488dd7b5
JB		 2977 int ret;
2978
2979 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
2980 len - baselen,
2981 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
934457ee 2982 (u8 *) &noa, sizeof(noa));
67baf663
JD		 2983 if (ret >= 2) {
2984 if (sdata->u.mgd.p2p_noa_index != noa.index) {
2985 /* valid noa_attr and index changed */
2986 sdata->u.mgd.p2p_noa_index = noa.index;
2987 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
2988 changed |= BSS_CHANGED_P2P_PS;
2989 /*
2990 * make sure we update all information, the CRC
2991 * mechanism doesn't look at P2P attributes.
2992 */
2993 ifmgd->beacon_crc_valid = false;
2994 }
2995 } else if (sdata->u.mgd.p2p_noa_index != -1) {
2996 /* noa_attr not found and we had valid noa_attr before */
2997 sdata->u.mgd.p2p_noa_index = -1;
2998 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
488dd7b5 2999 changed |= BSS_CHANGED_P2P_PS;
488dd7b5
JB		 3000 ifmgd->beacon_crc_valid = false;
3001 }
3002 }
3003
d8ec4433 3004 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
30eb1dc2 3005 return RX_MGMT_NONE;
30196673 3006 ifmgd->beacon_crc = ncrc;
d8ec4433 3007 ifmgd->beacon_crc_valid = true;
30196673 3008
d45c4172 3009 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
7d25745d
JB		 3010
3011 if (ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3012 elems.wmm_param_len))
3013 changed |= BSS_CHANGED_QOS;
3014
c65dd147
EG		 3015 /*
3016 * If we haven't had a beacon before, tell the driver about the
ef429dad 3017 * DTIM period (and beacon timing if desired) now.
c65dd147
EG		 3018 */
3019 if (!bss_conf->dtim_period) {
3020 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3021 if (elems.tim)
3022 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3023 else
3024 bss_conf->dtim_period = 1;
ef429dad
JB		 3025
3026 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3027 sdata->vif.bss_conf.sync_tsf =
3028 le64_to_cpu(mgmt->u.beacon.timestamp);
3029 sdata->vif.bss_conf.sync_device_ts =
3030 rx_status->device_timestamp;
3031 if (elems.tim)
3032 sdata->vif.bss_conf.sync_dtim_count =
3033 elems.tim->dtim_count;
3034 else
3035 sdata->vif.bss_conf.sync_dtim_count = 0;
3036 }
3037
c65dd147
EG		 3038 changed |= BSS_CHANGED_DTIM_PERIOD;
3039 }
3040
1946bed9 3041 if (elems.erp_info) {
7a5158ef
JB		 3042 erp_valid = true;
3043 erp_value = elems.erp_info[0];
3044 } else {
3045 erp_valid = false;
50c4afb9 3046 }
7a5158ef
JB		 3047 changed |= ieee80211_handle_bss_capability(sdata,
3048 le16_to_cpu(mgmt->u.beacon.capab_info),
3049 erp_valid, erp_value);
f0706e82 3050
1128958d 3051 mutex_lock(&local->sta_mtx);
bee7f586
JB		 3052 sta = sta_info_get(sdata, bssid);
3053
30eb1dc2
JB		 3054 if (ieee80211_config_bw(sdata, sta, elems.ht_operation,
3055 elems.vht_operation, bssid, &changed)) {
3056 mutex_unlock(&local->sta_mtx);
3057 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3058 WLAN_REASON_DEAUTH_LEAVING,
3059 true, deauth_buf);
3060 return RX_MGMT_CFG80211_TX_DEAUTH;
3061 }
bee7f586
JB		 3062
3063 if (sta && elems.opmode_notif)
3064 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3065 rx_status->band, true);
1128958d 3066 mutex_unlock(&local->sta_mtx);
d3c990fb 3067
04b7b2ff
JB		 3068 if (elems.country_elem && elems.pwr_constr_elem &&
3069 mgmt->u.probe_resp.capab_info &
3070 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT))
1ea6f9c0
JB		 3071 changed |= ieee80211_handle_pwr_constr(sdata, chan,
3072 elems.country_elem,
3073 elems.country_elem_len,
3074 elems.pwr_constr_elem);
3f2355cb 3075
471b3efd 3076 ieee80211_bss_info_change_notify(sdata, changed);
30eb1dc2
JB		 3077
3078 return RX_MGMT_NONE;
f0706e82
JB		 3079}
3080
1fa57d01
JB		 3081void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3082 struct sk_buff *skb)
f0706e82 3083{
77fdaa12 3084 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 3085 struct ieee80211_rx_status *rx_status;
f0706e82 3086 struct ieee80211_mgmt *mgmt;
66e67e41 3087 struct cfg80211_bss *bss = NULL;
77fdaa12 3088 enum rx_mgmt_action rma = RX_MGMT_NONE;
30eb1dc2 3089 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
f0706e82
JB		 3090 u16 fc;
3091
f0706e82
JB		 3092 rx_status = (struct ieee80211_rx_status *) skb->cb;
3093 mgmt = (struct ieee80211_mgmt *) skb->data;
3094 fc = le16_to_cpu(mgmt->frame_control);
3095
77fdaa12
JB		 3096 mutex_lock(&ifmgd->mtx);
3097
66e67e41
JB		 3098 switch (fc & IEEE80211_FCTL_STYPE) {
3099 case IEEE80211_STYPE_BEACON:
30eb1dc2
JB		 3100 rma = ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
3101 deauth_buf, rx_status);
66e67e41
JB		 3102 break;
3103 case IEEE80211_STYPE_PROBE_RESP:
3104 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3105 break;
3106 case IEEE80211_STYPE_AUTH:
3107 rma = ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3108 break;
3109 case IEEE80211_STYPE_DEAUTH:
3110 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3111 break;
3112 case IEEE80211_STYPE_DISASSOC:
3113 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3114 break;
3115 case IEEE80211_STYPE_ASSOC_RESP:
3116 case IEEE80211_STYPE_REASSOC_RESP:
3117 rma = ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, &bss);
3118 break;
3119 case IEEE80211_STYPE_ACTION:
3120 switch (mgmt->u.action.category) {
3121 case WLAN_CATEGORY_SPECTRUM_MGMT:
3122 ieee80211_sta_process_chanswitch(sdata,
3123 &mgmt->u.action.u.chan_switch.sw_elem,
3124 (void *)ifmgd->associated->priv,
3125 rx_status->mactime);
77fdaa12 3126 break;
77fdaa12 3127 }
77fdaa12 3128 }
77fdaa12
JB		 3129 mutex_unlock(&ifmgd->mtx);
3130
66e67e41
JB		 3131 switch (rma) {
3132 case RX_MGMT_NONE:
3133 /* no action */
3134 break;
3135 case RX_MGMT_CFG80211_DEAUTH:
ce470613 3136 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
66e67e41
JB		 3137 break;
3138 case RX_MGMT_CFG80211_DISASSOC:
3139 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
3140 break;
3141 case RX_MGMT_CFG80211_RX_AUTH:
3142 cfg80211_send_rx_auth(sdata->dev, (u8 *)mgmt, skb->len);
3143 break;
3144 case RX_MGMT_CFG80211_RX_ASSOC:
3145 cfg80211_send_rx_assoc(sdata->dev, bss, (u8 *)mgmt, skb->len);
3146 break;
3147 case RX_MGMT_CFG80211_ASSOC_TIMEOUT:
3148 cfg80211_send_assoc_timeout(sdata->dev, mgmt->bssid);
3149 break;
30eb1dc2
JB		 3150 case RX_MGMT_CFG80211_TX_DEAUTH:
3151 cfg80211_send_deauth(sdata->dev, deauth_buf,
3152 sizeof(deauth_buf));
3153 break;
66e67e41
JB		 3154 default:
3155 WARN(1, "unexpected: %d", rma);
b054b747 3156 }
f0706e82
JB		 3157}
3158
9c6bd790 3159static void ieee80211_sta_timer(unsigned long data)
f0706e82 3160{
60f8b39c
JB		 3161 struct ieee80211_sub_if_data *sdata =
3162 (struct ieee80211_sub_if_data *) data;
5bb644a0 3163
9b7d72c1 3164 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
f0706e82
JB		 3165}
3166
04ac3c0e 3167static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
6b684db1 3168 u8 *bssid, u8 reason, bool tx)
04ac3c0e 3169{
04ac3c0e 3170 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 3171 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
04ac3c0e 3172
37ad3888 3173 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
6b684db1 3174 tx, frame_buf);
04ac3c0e 3175 mutex_unlock(&ifmgd->mtx);
37ad3888 3176
04ac3c0e
FF		 3177 /*
3178 * must be outside lock due to cfg80211,
3179 * but that's not a problem.
3180 */
6ae16775 3181 cfg80211_send_deauth(sdata->dev, frame_buf, IEEE80211_DEAUTH_FRAME_LEN);
fcac4fb0 3182
04ac3c0e
FF		 3183 mutex_lock(&ifmgd->mtx);
3184}
3185
66e67e41
JB		 3186static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
3187{
3188 struct ieee80211_local *local = sdata->local;
3189 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3190 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
1672c0e3 3191 u32 tx_flags = 0;
66e67e41
JB		 3192
3193 lockdep_assert_held(&ifmgd->mtx);
3194
3195 if (WARN_ON_ONCE(!auth_data))
3196 return -EINVAL;
3197
1672c0e3
JB		 3198 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3199 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3200 IEEE80211_TX_INTFL_MLME_CONN_TX;
3201
66e67e41
JB		 3202 auth_data->tries++;
3203
3204 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
bdcbd8e0
JB		 3205 sdata_info(sdata, "authentication with %pM timed out\n",
3206 auth_data->bss->bssid);
66e67e41
JB		 3207
3208 /*
3209 * Most likely AP is not in the range so remove the
3210 * bss struct for that AP.
3211 */
3212 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3213
3214 return -ETIMEDOUT;
3215 }
3216
a1845fc7
JB		 3217 drv_mgd_prepare_tx(local, sdata);
3218
66e67e41 3219 if (auth_data->bss->proberesp_ies) {
6b8ece3a
JM		 3220 u16 trans = 1;
3221 u16 status = 0;
3222
bdcbd8e0
JB		 3223 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3224 auth_data->bss->bssid, auth_data->tries,
3225 IEEE80211_AUTH_MAX_TRIES);
66e67e41
JB		 3226
3227 auth_data->expected_transaction = 2;
6b8ece3a
JM		 3228
3229 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3230 trans = auth_data->sae_trans;
3231 status = auth_data->sae_status;
3232 auth_data->expected_transaction = trans;
3233 }
3234
3235 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3236 auth_data->data, auth_data->data_len,
66e67e41 3237 auth_data->bss->bssid,
1672c0e3
JB		 3238 auth_data->bss->bssid, NULL, 0, 0,
3239 tx_flags);
66e67e41
JB		 3240 } else {
3241 const u8 *ssidie;
3242
bdcbd8e0
JB		 3243 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
3244 auth_data->bss->bssid, auth_data->tries,
3245 IEEE80211_AUTH_MAX_TRIES);
66e67e41 3246
9caf0364 3247 rcu_read_lock();
66e67e41 3248 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
9caf0364
JB		 3249 if (!ssidie) {
3250 rcu_read_unlock();
66e67e41 3251 return -EINVAL;
9caf0364 3252 }
66e67e41
JB		 3253 /*
3254 * Direct probe is sent to broadcast address as some APs
3255 * will not answer to direct packet in unassociated state.
3256 */
3257 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
1672c0e3 3258 NULL, 0, (u32) -1, true, tx_flags,
55de908a 3259 auth_data->bss->channel, false);
9caf0364 3260 rcu_read_unlock();
66e67e41
JB		 3261 }
3262
1672c0e3
JB		 3263 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
3264 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
89afe614 3265 ifmgd->auth_data->timeout_started = true;
1672c0e3 3266 run_again(ifmgd, auth_data->timeout);
89afe614
JB		 3267 } else {
3268 auth_data->timeout_started = false;
1672c0e3 3269 }
66e67e41
JB		 3270
3271 return 0;
3272}
3273
3274static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3275{
3276 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3277 struct ieee80211_local *local = sdata->local;
3278
3279 lockdep_assert_held(&sdata->u.mgd.mtx);
3280
66e67e41
JB		 3281 assoc_data->tries++;
3282 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
bdcbd8e0
JB		 3283 sdata_info(sdata, "association with %pM timed out\n",
3284 assoc_data->bss->bssid);
66e67e41
JB		 3285
3286 /*
3287 * Most likely AP is not in the range so remove the
3288 * bss struct for that AP.
3289 */
3290 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3291
3292 return -ETIMEDOUT;
3293 }
3294
bdcbd8e0
JB		 3295 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3296 assoc_data->bss->bssid, assoc_data->tries,
3297 IEEE80211_ASSOC_MAX_TRIES);
66e67e41
JB		 3298 ieee80211_send_assoc(sdata);
3299
1672c0e3
JB		 3300 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
3301 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
89afe614 3302 assoc_data->timeout_started = true;
1672c0e3 3303 run_again(&sdata->u.mgd, assoc_data->timeout);
89afe614
JB		 3304 } else {
3305 assoc_data->timeout_started = false;
1672c0e3 3306 }
66e67e41
JB		 3307
3308 return 0;
3309}
3310
1672c0e3
JB		 3311void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3312 __le16 fc, bool acked)
3313{
3314 struct ieee80211_local *local = sdata->local;
3315
3316 sdata->u.mgd.status_fc = fc;
3317 sdata->u.mgd.status_acked = acked;
3318 sdata->u.mgd.status_received = true;
3319
3320 ieee80211_queue_work(&local->hw, &sdata->work);
3321}
3322
1fa57d01 3323void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 3324{
9c6bd790 3325 struct ieee80211_local *local = sdata->local;
1fa57d01 3326 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 3327
77fdaa12
JB		 3328 mutex_lock(&ifmgd->mtx);
3329
1672c0e3
JB		 3330 if (ifmgd->status_received) {
3331 __le16 fc = ifmgd->status_fc;
3332 bool status_acked = ifmgd->status_acked;
3333
3334 ifmgd->status_received = false;
3335 if (ifmgd->auth_data &&
3336 (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) {
3337 if (status_acked) {
3338 ifmgd->auth_data->timeout =
3339 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3340 run_again(ifmgd, ifmgd->auth_data->timeout);
3341 } else {
3342 ifmgd->auth_data->timeout = jiffies - 1;
3343 }
89afe614 3344 ifmgd->auth_data->timeout_started = true;
1672c0e3
JB		 3345 } else if (ifmgd->assoc_data &&
3346 (ieee80211_is_assoc_req(fc) ||
3347 ieee80211_is_reassoc_req(fc))) {
3348 if (status_acked) {
3349 ifmgd->assoc_data->timeout =
3350 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3351 run_again(ifmgd, ifmgd->assoc_data->timeout);
3352 } else {
3353 ifmgd->assoc_data->timeout = jiffies - 1;
3354 }
89afe614 3355 ifmgd->assoc_data->timeout_started = true;
1672c0e3
JB		 3356 }
3357 }
3358
89afe614 3359 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
66e67e41
JB		 3360 time_after(jiffies, ifmgd->auth_data->timeout)) {
3361 if (ifmgd->auth_data->done) {
3362 /*
3363 * ok ... we waited for assoc but userspace didn't,
3364 * so let's just kill the auth data
3365 */
3366 ieee80211_destroy_auth_data(sdata, false);
3367 } else if (ieee80211_probe_auth(sdata)) {
3368 u8 bssid[ETH_ALEN];
3369
3370 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3371
3372 ieee80211_destroy_auth_data(sdata, false);
3373
3374 mutex_unlock(&ifmgd->mtx);
3375 cfg80211_send_auth_timeout(sdata->dev, bssid);
3376 mutex_lock(&ifmgd->mtx);
3377 }
89afe614 3378 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
66e67e41
JB		 3379 run_again(ifmgd, ifmgd->auth_data->timeout);
3380
89afe614 3381 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
66e67e41 3382 time_after(jiffies, ifmgd->assoc_data->timeout)) {
c65dd147
EG		 3383 if ((ifmgd->assoc_data->need_beacon &&
3384 !ifmgd->assoc_data->have_beacon) ||
66e67e41
JB		 3385 ieee80211_do_assoc(sdata)) {
3386 u8 bssid[ETH_ALEN];
3387
3388 memcpy(bssid, ifmgd->assoc_data->bss->bssid, ETH_ALEN);
3389
3390 ieee80211_destroy_assoc_data(sdata, false);
3391
3392 mutex_unlock(&ifmgd->mtx);
3393 cfg80211_send_assoc_timeout(sdata->dev, bssid);
3394 mutex_lock(&ifmgd->mtx);
3395 }
89afe614 3396 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
66e67e41
JB		 3397 run_again(ifmgd, ifmgd->assoc_data->timeout);
3398
b291ba11
JB		 3399 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
3400 IEEE80211_STA_CONNECTION_POLL) &&
3401 ifmgd->associated) {
a43abf29 3402 u8 bssid[ETH_ALEN];
72a8a3ed 3403 int max_tries;
a43abf29 3404
0c1ad2ca 3405 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 3406
72a8a3ed 3407 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
180205bd 3408 max_tries = max_nullfunc_tries;
72a8a3ed 3409 else
180205bd 3410 max_tries = max_probe_tries;
72a8a3ed 3411
4e5ff376
FF		 3412 /* ACK received for nullfunc probing frame */
3413 if (!ifmgd->probe_send_count)
3414 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 3415 else if (ifmgd->nullfunc_failed) {
3416 if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3417 mlme_dbg(sdata,
3418 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3419 bssid, ifmgd->probe_send_count,
3420 max_tries);
04ac3c0e
FF		 3421 ieee80211_mgd_probe_ap_send(sdata);
3422 } else {
bdcbd8e0
JB		 3423 mlme_dbg(sdata,
3424 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3425 bssid);
95acac61 3426 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1
JB		 3427 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3428 false);
04ac3c0e
FF		 3429 }
3430 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
b291ba11 3431 run_again(ifmgd, ifmgd->probe_timeout);
04ac3c0e 3432 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
bdcbd8e0
JB		 3433 mlme_dbg(sdata,
3434 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3435 bssid, probe_wait_ms);
95acac61 3436 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 3437 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
04ac3c0e 3438 } else if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3439 mlme_dbg(sdata,
3440 "No probe response from AP %pM after %dms, try %d/%i\n",
3441 bssid, probe_wait_ms,
3442 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 3443 ieee80211_mgd_probe_ap_send(sdata);
3444 } else {
b291ba11
JB		 3445 /*
3446 * We actually lost the connection ... or did we?
3447 * Let's make sure!
3448 */
b38afa87
BG		 3449 wiphy_debug(local->hw.wiphy,
3450 "%s: No probe response from AP %pM"
3451 " after %dms, disconnecting.\n",
3452 sdata->name,
180205bd 3453 bssid, probe_wait_ms);
04ac3c0e 3454
95acac61 3455 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 3456 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
b291ba11
JB		 3457 }
3458 }
3459
77fdaa12 3460 mutex_unlock(&ifmgd->mtx);
f0706e82
JB		 3461}
3462
b291ba11
JB		 3463static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3464{
3465 struct ieee80211_sub_if_data *sdata =
3466 (struct ieee80211_sub_if_data *) data;
3467 struct ieee80211_local *local = sdata->local;
3468
3469 if (local->quiescing)
3470 return;
3471
682bd38b 3472 sdata->u.mgd.connection_loss = false;
1e4dcd01
JO		 3473 ieee80211_queue_work(&sdata->local->hw,
3474 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 3475}
3476
3477static void ieee80211_sta_conn_mon_timer(unsigned long data)
3478{
3479 struct ieee80211_sub_if_data *sdata =
3480 (struct ieee80211_sub_if_data *) data;
3481 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3482 struct ieee80211_local *local = sdata->local;
3483
3484 if (local->quiescing)
3485 return;
3486
42935eca 3487 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 3488}
3489
3490static void ieee80211_sta_monitor_work(struct work_struct *work)
3491{
3492 struct ieee80211_sub_if_data *sdata =
3493 container_of(work, struct ieee80211_sub_if_data,
3494 u.mgd.monitor_work);
3495
3496 ieee80211_mgd_probe_ap(sdata, false);
3497}
3498
9c6bd790
JB		 3499static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3500{
494f1fe5
EP		 3501 u32 flags;
3502
ad935687 3503 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
925e64c3 3504 __ieee80211_stop_poll(sdata);
ad935687 3505
b291ba11 3506 /* let's probe the connection once */
494f1fe5
EP		 3507 flags = sdata->local->hw.flags;
3508 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3509 ieee80211_queue_work(&sdata->local->hw,
3510 &sdata->u.mgd.monitor_work);
b291ba11 3511 /* and do all the other regular work too */
64592c8f 3512 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 3513 }
9c6bd790 3514}
f0706e82 3515
9c6bd790
JB		 3516/* interface setup */
3517void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 3518{
46900298 3519 struct ieee80211_if_managed *ifmgd;
988c0f72 3520
46900298 3521 ifmgd = &sdata->u.mgd;
b291ba11 3522 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 3523 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 3524 INIT_WORK(&ifmgd->beacon_connection_loss_work,
3525 ieee80211_beacon_connection_loss_work);
882a7c69
JB		 3526 INIT_WORK(&ifmgd->csa_connection_drop_work,
3527 ieee80211_csa_connection_drop_work);
d1f5b7a3 3528 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
46900298 3529 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 3530 (unsigned long) sdata);
b291ba11
JB		 3531 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
3532 (unsigned long) sdata);
3533 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
3534 (unsigned long) sdata);
46900298 3535 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 3536 (unsigned long) sdata);
9c6bd790 3537
ab1faead 3538 ifmgd->flags = 0;
1478acb3 3539 ifmgd->powersave = sdata->wdev.ps;
219c3867
AB		 3540 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
3541 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
67baf663 3542 ifmgd->p2p_noa_index = -1;
bbbdff9e 3543
77fdaa12 3544 mutex_init(&ifmgd->mtx);
0f78231b
JB		 3545
3546 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
3547 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
3548 else
3549 ifmgd->req_smps = IEEE80211_SMPS_OFF;
f0706e82
JB		 3550}
3551
77fdaa12
JB		 3552/* scan finished notification */
3553void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 3554{
31ee67a1 3555 struct ieee80211_sub_if_data *sdata;
60f8b39c 3556
77fdaa12
JB		 3557 /* Restart STA timers */
3558 rcu_read_lock();
3559 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3560 ieee80211_restart_sta_timer(sdata);
3561 rcu_read_unlock();
3562}
60f8b39c 3563
77fdaa12
JB		 3564int ieee80211_max_network_latency(struct notifier_block *nb,
3565 unsigned long data, void *dummy)
3566{
3567 s32 latency_usec = (s32) data;
3568 struct ieee80211_local *local =
3569 container_of(nb, struct ieee80211_local,
3570 network_latency_notifier);
1fa6f4af 3571
77fdaa12
JB		 3572 mutex_lock(&local->iflist_mtx);
3573 ieee80211_recalc_ps(local, latency_usec);
3574 mutex_unlock(&local->iflist_mtx);
dfe67012 3575
77fdaa12 3576 return 0;
9c6bd790
JB		 3577}
3578
f2d9d270
JB		 3579static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
3580 struct cfg80211_bss *cbss)
3581{
3582 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3583 const u8 *ht_cap_ie, *vht_cap_ie;
3584 const struct ieee80211_ht_cap *ht_cap;
3585 const struct ieee80211_vht_cap *vht_cap;
3586 u8 chains = 1;
3587
3588 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
3589 return chains;
3590
9caf0364 3591 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
f2d9d270
JB		 3592 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
3593 ht_cap = (void *)(ht_cap_ie + 2);
3594 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
3595 /*
3596 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
3597 * "Tx Unequal Modulation Supported" fields.
3598 */
3599 }
3600
3601 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
3602 return chains;
3603
9caf0364 3604 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
f2d9d270
JB		 3605 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
3606 u8 nss;
3607 u16 tx_mcs_map;
3608
3609 vht_cap = (void *)(vht_cap_ie + 2);
3610 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
3611 for (nss = 8; nss > 0; nss--) {
3612 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
3613 IEEE80211_VHT_MCS_NOT_SUPPORTED)
3614 break;
3615 }
3616 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
3617 chains = max(chains, nss);
3618 }
3619
3620 return chains;
3621}
3622
b17166a7
JB		 3623static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
3624 struct cfg80211_bss *cbss)
a1cf775d
JB		 3625{
3626 struct ieee80211_local *local = sdata->local;
3627 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
24398e39 3628 const struct ieee80211_ht_operation *ht_oper = NULL;
f2d9d270 3629 const struct ieee80211_vht_operation *vht_oper = NULL;
24398e39 3630 struct ieee80211_supported_band *sband;
4bf88530 3631 struct cfg80211_chan_def chandef;
f2d9d270 3632 int ret;
a1cf775d 3633
24398e39
JB		 3634 sband = local->hw.wiphy->bands[cbss->channel->band];
3635
f2d9d270
JB		 3636 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
3637 IEEE80211_STA_DISABLE_80P80MHZ |
3638 IEEE80211_STA_DISABLE_160MHZ);
3639
9caf0364
JB		 3640 rcu_read_lock();
3641
f2d9d270
JB		 3642 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3643 sband->ht_cap.ht_supported) {
08e6effa 3644 const u8 *ht_oper_ie, *ht_cap;
24398e39 3645
9caf0364 3646 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
24398e39
JB		 3647 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3648 ht_oper = (void *)(ht_oper_ie + 2);
08e6effa
JB		 3649
3650 ht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
3651 if (!ht_cap || ht_cap[1] < sizeof(struct ieee80211_ht_cap)) {
3652 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3653 ht_oper = NULL;
3654 }
24398e39
JB		 3655 }
3656
f2d9d270
JB		 3657 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3658 sband->vht_cap.vht_supported) {
08e6effa 3659 const u8 *vht_oper_ie, *vht_cap;
f2d9d270 3660
9caf0364
JB		 3661 vht_oper_ie = ieee80211_bss_get_ie(cbss,
3662 WLAN_EID_VHT_OPERATION);
f2d9d270
JB		 3663 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
3664 vht_oper = (void *)(vht_oper_ie + 2);
3665 if (vht_oper && !ht_oper) {
3666 vht_oper = NULL;
bdcbd8e0 3667 sdata_info(sdata,
f2d9d270 3668 "AP advertised VHT without HT, disabling both\n");
cb145022
JB		 3669 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3670 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
24398e39 3671 }
08e6effa
JB		 3672
3673 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
3674 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
3675 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3676 vht_oper = NULL;
3677 }
24398e39
JB		 3678 }
3679
f2d9d270
JB		 3680 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
3681 cbss->channel,
3682 ht_oper, vht_oper,
30eb1dc2 3683 &chandef, true);
04ecd257 3684
f2d9d270
JB		 3685 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
3686 local->rx_chains);
24398e39 3687
9caf0364
JB		 3688 rcu_read_unlock();
3689
04ecd257
JB		 3690 /* will change later if needed */
3691 sdata->smps_mode = IEEE80211_SMPS_OFF;
3692
f2d9d270
JB		 3693 /*
3694 * If this fails (possibly due to channel context sharing
3695 * on incompatible channels, e.g. 80+80 and 160 sharing the
3696 * same control channel) try to use a smaller bandwidth.
3697 */
3698 ret = ieee80211_vif_use_channel(sdata, &chandef,
3699 IEEE80211_CHANCTX_SHARED);
d601cd8d 3700 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
f2d9d270 3701 ifmgd->flags |= chandef_downgrade(&chandef);
d601cd8d
JB		 3702 ret = ieee80211_vif_use_channel(sdata, &chandef,
3703 IEEE80211_CHANCTX_SHARED);
3704 }
f2d9d270 3705 return ret;
b17166a7
JB		 3706}
3707
3708static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
3709 struct cfg80211_bss *cbss, bool assoc)
3710{
3711 struct ieee80211_local *local = sdata->local;
3712 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3713 struct ieee80211_bss *bss = (void *)cbss->priv;
3714 struct sta_info *new_sta = NULL;
3715 bool have_sta = false;
3716 int err;
3717
3718 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3719 return -EINVAL;
3720
3721 if (assoc) {
3722 rcu_read_lock();
3723 have_sta = sta_info_get(sdata, cbss->bssid);
3724 rcu_read_unlock();
3725 }
3726
3727 if (!have_sta) {
3728 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
3729 if (!new_sta)
3730 return -ENOMEM;
3731 }
3732
13e0c8e3 3733 if (new_sta) {
5d6a1b06
JB		 3734 u32 rates = 0, basic_rates = 0;
3735 bool have_higher_than_11mbit;
3736 int min_rate = INT_MAX, min_rate_index = -1;
b17166a7 3737 struct ieee80211_supported_band *sband;
8cef2c9d 3738 const struct cfg80211_bss_ies *ies;
b17166a7
JB		 3739
3740 sband = local->hw.wiphy->bands[cbss->channel->band];
3741
3742 err = ieee80211_prep_channel(sdata, cbss);
3743 if (err) {
3744 sta_info_free(local, new_sta);
3745 return err;
3746 }
5d6a1b06 3747
5d6a1b06
JB		 3748 ieee80211_get_rates(sband, bss->supp_rates,
3749 bss->supp_rates_len,
3750 &rates, &basic_rates,
3751 &have_higher_than_11mbit,
3752 &min_rate, &min_rate_index);
3753
3754 /*
3755 * This used to be a workaround for basic rates missing
3756 * in the association response frame. Now that we no
3757 * longer use the basic rates from there, it probably
3758 * doesn't happen any more, but keep the workaround so
3759 * in case some *other* APs are buggy in different ways
3760 * we can connect -- with a warning.
3761 */
3762 if (!basic_rates && min_rate_index >= 0) {
bdcbd8e0
JB		 3763 sdata_info(sdata,
3764 "No basic rates, using min rate instead\n");
5d6a1b06
JB		 3765 basic_rates = BIT(min_rate_index);
3766 }
3767
13e0c8e3 3768 new_sta->sta.supp_rates[cbss->channel->band] = rates;
5d6a1b06
JB		 3769 sdata->vif.bss_conf.basic_rates = basic_rates;
3770
3771 /* cf. IEEE 802.11 9.2.12 */
55de908a 3772 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
5d6a1b06
JB		 3773 have_higher_than_11mbit)
3774 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3775 else
3776 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
3777
3778 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
3779
8c358bcd
JB		 3780 /* set timing information */
3781 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
8cef2c9d 3782 rcu_read_lock();
ef429dad
JB		 3783 ies = rcu_dereference(cbss->beacon_ies);
3784 if (ies) {
3785 const u8 *tim_ie;
3786
3787 sdata->vif.bss_conf.sync_tsf = ies->tsf;
3788 sdata->vif.bss_conf.sync_device_ts =
3789 bss->device_ts_beacon;
3790 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
3791 ies->data, ies->len);
3792 if (tim_ie && tim_ie[1] >= 2)
3793 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
3794 else
3795 sdata->vif.bss_conf.sync_dtim_count = 0;
3796 } else if (!(local->hw.flags &
3797 IEEE80211_HW_TIMING_BEACON_ONLY)) {
3798 ies = rcu_dereference(cbss->proberesp_ies);
3799 /* must be non-NULL since beacon IEs were NULL */
3800 sdata->vif.bss_conf.sync_tsf = ies->tsf;
3801 sdata->vif.bss_conf.sync_device_ts =
3802 bss->device_ts_presp;
3803 sdata->vif.bss_conf.sync_dtim_count = 0;
3804 } else {
3805 sdata->vif.bss_conf.sync_tsf = 0;
3806 sdata->vif.bss_conf.sync_device_ts = 0;
3807 sdata->vif.bss_conf.sync_dtim_count = 0;
3808 }
8cef2c9d 3809 rcu_read_unlock();
8c358bcd
JB		 3810
3811 /* tell driver about BSSID, basic rates and timing */
5d6a1b06 3812 ieee80211_bss_info_change_notify(sdata,
8c358bcd
JB		 3813 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
3814 BSS_CHANGED_BEACON_INT);
a1cf775d
JB		 3815
3816 if (assoc)
13e0c8e3 3817 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
a1cf775d 3818
13e0c8e3
JB		 3819 err = sta_info_insert(new_sta);
3820 new_sta = NULL;
a1cf775d 3821 if (err) {
bdcbd8e0
JB		 3822 sdata_info(sdata,
3823 "failed to insert STA entry for the AP (error %d)\n",
3824 err);
a1cf775d
JB		 3825 return err;
3826 }
3827 } else
b203ca39 3828 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
a1cf775d
JB		 3829
3830 return 0;
3831}
3832
77fdaa12
JB		 3833/* config hooks */
3834int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
3835 struct cfg80211_auth_request *req)
9c6bd790 3836{
66e67e41
JB		 3837 struct ieee80211_local *local = sdata->local;
3838 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3839 struct ieee80211_mgd_auth_data *auth_data;
77fdaa12 3840 u16 auth_alg;
66e67e41
JB		 3841 int err;
3842
3843 /* prepare auth data structure */
9c6bd790 3844
77fdaa12
JB		 3845 switch (req->auth_type) {
3846 case NL80211_AUTHTYPE_OPEN_SYSTEM:
3847 auth_alg = WLAN_AUTH_OPEN;
3848 break;
3849 case NL80211_AUTHTYPE_SHARED_KEY:
66e67e41 3850 if (IS_ERR(local->wep_tx_tfm))
9dca9c49 3851 return -EOPNOTSUPP;
77fdaa12
JB		 3852 auth_alg = WLAN_AUTH_SHARED_KEY;
3853 break;
3854 case NL80211_AUTHTYPE_FT:
3855 auth_alg = WLAN_AUTH_FT;
3856 break;
3857 case NL80211_AUTHTYPE_NETWORK_EAP:
3858 auth_alg = WLAN_AUTH_LEAP;
3859 break;
6b8ece3a
JM		 3860 case NL80211_AUTHTYPE_SAE:
3861 auth_alg = WLAN_AUTH_SAE;
3862 break;
77fdaa12
JB		 3863 default:
3864 return -EOPNOTSUPP;
60f8b39c 3865 }
77fdaa12 3866
6b8ece3a
JM		 3867 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
3868 req->ie_len, GFP_KERNEL);
66e67e41 3869 if (!auth_data)
9c6bd790 3870 return -ENOMEM;
77fdaa12 3871
66e67e41 3872 auth_data->bss = req->bss;
77fdaa12 3873
6b8ece3a
JM		 3874 if (req->sae_data_len >= 4) {
3875 __le16 *pos = (__le16 *) req->sae_data;
3876 auth_data->sae_trans = le16_to_cpu(pos[0]);
3877 auth_data->sae_status = le16_to_cpu(pos[1]);
3878 memcpy(auth_data->data, req->sae_data + 4,
3879 req->sae_data_len - 4);
3880 auth_data->data_len += req->sae_data_len - 4;
3881 }
3882
77fdaa12 3883 if (req->ie && req->ie_len) {
6b8ece3a
JM		 3884 memcpy(&auth_data->data[auth_data->data_len],
3885 req->ie, req->ie_len);
3886 auth_data->data_len += req->ie_len;
9c6bd790 3887 }
77fdaa12 3888
fffd0934 3889 if (req->key && req->key_len) {
66e67e41
JB		 3890 auth_data->key_len = req->key_len;
3891 auth_data->key_idx = req->key_idx;
3892 memcpy(auth_data->key, req->key, req->key_len);
fffd0934
JB		 3893 }
3894
66e67e41 3895 auth_data->algorithm = auth_alg;
60f8b39c 3896
66e67e41 3897 /* try to authenticate/probe */
2a33bee2 3898
66e67e41 3899 mutex_lock(&ifmgd->mtx);
2a33bee2 3900
66e67e41
JB		 3901 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
3902 ifmgd->assoc_data) {
3903 err = -EBUSY;
3904 goto err_free;
2a33bee2
GE		 3905 }
3906
66e67e41
JB		 3907 if (ifmgd->auth_data)
3908 ieee80211_destroy_auth_data(sdata, false);
2a33bee2 3909
66e67e41
JB		 3910 /* prep auth_data so we don't go into idle on disassoc */
3911 ifmgd->auth_data = auth_data;
af6b6374 3912
66e67e41 3913 if (ifmgd->associated)
37ad3888 3914 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
af6b6374 3915
bdcbd8e0 3916 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
e5b900d2 3917
a1cf775d
JB		 3918 err = ieee80211_prep_connection(sdata, req->bss, false);
3919 if (err)
66e67e41 3920 goto err_clear;
af6b6374 3921
66e67e41
JB		 3922 err = ieee80211_probe_auth(sdata);
3923 if (err) {
66e67e41
JB		 3924 sta_info_destroy_addr(sdata, req->bss->bssid);
3925 goto err_clear;
3926 }
3927
3928 /* hold our own reference */
5b112d3d 3929 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
66e67e41
JB		 3930 err = 0;
3931 goto out_unlock;
3932
3933 err_clear:
3d2abdfd
EP		 3934 memset(ifmgd->bssid, 0, ETH_ALEN);
3935 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 3936 ifmgd->auth_data = NULL;
3937 err_free:
3938 kfree(auth_data);
3939 out_unlock:
3940 mutex_unlock(&ifmgd->mtx);
b2abb6e2 3941
66e67e41 3942 return err;
af6b6374
JB		 3943}
3944
77fdaa12
JB		 3945int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
3946 struct cfg80211_assoc_request *req)
f0706e82 3947{
66e67e41 3948 struct ieee80211_local *local = sdata->local;
77fdaa12 3949 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 3950 struct ieee80211_bss *bss = (void *)req->bss->priv;
66e67e41 3951 struct ieee80211_mgd_assoc_data *assoc_data;
c65dd147 3952 const struct cfg80211_bss_ies *beacon_ies;
4e74bfdb 3953 struct ieee80211_supported_band *sband;
b08fbbd8 3954 const u8 *ssidie, *ht_ie, *vht_ie;
2a33bee2 3955 int i, err;
f0706e82 3956
66e67e41
JB		 3957 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
3958 if (!assoc_data)
3959 return -ENOMEM;
3960
9caf0364
JB		 3961 rcu_read_lock();
3962 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
3963 if (!ssidie) {
3964 rcu_read_unlock();
3965 kfree(assoc_data);
3966 return -EINVAL;
3967 }
3968 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
3969 assoc_data->ssid_len = ssidie[1];
3970 rcu_read_unlock();
3971
77fdaa12 3972 mutex_lock(&ifmgd->mtx);
9c87ba67 3973
66e67e41 3974 if (ifmgd->associated)
37ad3888 3975 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
66e67e41
JB		 3976
3977 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
3978 err = -EBUSY;
3979 goto err_free;
af6b6374 3980 }
77fdaa12 3981
66e67e41
JB		 3982 if (ifmgd->assoc_data) {
3983 err = -EBUSY;
3984 goto err_free;
3985 }
77fdaa12 3986
66e67e41
JB		 3987 if (ifmgd->auth_data) {
3988 bool match;
3989
3990 /* keep sta info, bssid if matching */
b203ca39 3991 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
66e67e41 3992 ieee80211_destroy_auth_data(sdata, match);
2a33bee2
GE		 3993 }
3994
66e67e41 3995 /* prepare assoc data */
19c3b830 3996
d8ec4433
JO		 3997 ifmgd->beacon_crc_valid = false;
3998
de5036aa
JB		 3999 /*
4000 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4001 * We still associate in non-HT mode (11a/b/g) if any one of these
4002 * ciphers is configured as pairwise.
4003 * We can set this to true for non-11n hardware, that'll be checked
4004 * separately along with the peer capabilities.
4005 */
1c4cb928 4006 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
77fdaa12
JB		 4007 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4008 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
1c4cb928 4009 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
a8243b72 4010 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
d545daba 4011 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
1c4cb928 4012 netdev_info(sdata->dev,
d545daba 4013 "disabling HT/VHT due to WEP/TKIP use\n");
1c4cb928
JB		 4014 }
4015 }
77fdaa12 4016
d545daba 4017 if (req->flags & ASSOC_REQ_DISABLE_HT) {
a8243b72 4018 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
d545daba
MP		 4019 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4020 }
ef96a842 4021
dd5ecfea
JB		 4022 if (req->flags & ASSOC_REQ_DISABLE_VHT)
4023 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4024
4e74bfdb
JB		 4025 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4026 sband = local->hw.wiphy->bands[req->bss->channel->band];
4027 if (!sband->ht_cap.ht_supported ||
1c4cb928 4028 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
a8243b72 4029 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
1b49de26
JB		 4030 if (!bss->wmm_used)
4031 netdev_info(sdata->dev,
4032 "disabling HT as WMM/QoS is not supported by the AP\n");
1c4cb928 4033 }
4e74bfdb 4034
d545daba
MP		 4035 /* disable VHT if we don't support it or the AP doesn't use WMM */
4036 if (!sband->vht_cap.vht_supported ||
4037 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
4038 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
1b49de26
JB		 4039 if (!bss->wmm_used)
4040 netdev_info(sdata->dev,
4041 "disabling VHT as WMM/QoS is not supported by the AP\n");
d545daba
MP		 4042 }
4043
ef96a842
BG		 4044 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4045 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4046 sizeof(ifmgd->ht_capa_mask));
4047
dd5ecfea
JB		 4048 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4049 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4050 sizeof(ifmgd->vht_capa_mask));
4051
77fdaa12 4052 if (req->ie && req->ie_len) {
66e67e41
JB		 4053 memcpy(assoc_data->ie, req->ie, req->ie_len);
4054 assoc_data->ie_len = req->ie_len;
4055 }
f679f65d 4056
66e67e41 4057 assoc_data->bss = req->bss;
f679f65d 4058
af6b6374
JB		 4059 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4060 if (ifmgd->powersave)
04ecd257 4061 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
af6b6374 4062 else
04ecd257 4063 sdata->smps_mode = IEEE80211_SMPS_OFF;
af6b6374 4064 } else
04ecd257 4065 sdata->smps_mode = ifmgd->req_smps;
af6b6374 4066
66e67e41 4067 assoc_data->capability = req->bss->capability;
32c5057b
JB		 4068 assoc_data->wmm = bss->wmm_used &&
4069 (local->hw.queues >= IEEE80211_NUM_ACS);
66e67e41
JB		 4070 assoc_data->supp_rates = bss->supp_rates;
4071 assoc_data->supp_rates_len = bss->supp_rates_len;
9dde6423 4072
9caf0364 4073 rcu_read_lock();
9dde6423
JB		 4074 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4075 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4076 assoc_data->ap_ht_param =
4077 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4078 else
a8243b72 4079 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
b08fbbd8
JB		 4080 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4081 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4082 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4083 sizeof(struct ieee80211_vht_cap));
4084 else
4085 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
9caf0364 4086 rcu_read_unlock();
63f170e0 4087
ab13315a
KV		 4088 if (bss->wmm_used && bss->uapsd_supported &&
4089 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
76f0303d 4090 assoc_data->uapsd = true;
ab13315a
KV		 4091 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4092 } else {
76f0303d 4093 assoc_data->uapsd = false;
ab13315a
KV		 4094 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4095 }
4096
77fdaa12 4097 if (req->prev_bssid)
66e67e41 4098 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12
JB		 4099
4100 if (req->use_mfp) {
4101 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4102 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4103 } else {
4104 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4105 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4106 }
4107
4108 if (req->crypto.control_port)
4109 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4110 else
4111 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4112
a621fa4d
JB		 4113 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4114 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4115
66e67e41
JB		 4116 /* kick off associate process */
4117
4118 ifmgd->assoc_data = assoc_data;
826262c3 4119 ifmgd->dtim_period = 0;
66e67e41 4120
a1cf775d
JB		 4121 err = ieee80211_prep_connection(sdata, req->bss, true);
4122 if (err)
4123 goto err_clear;
66e67e41 4124
c65dd147
EG		 4125 rcu_read_lock();
4126 beacon_ies = rcu_dereference(req->bss->beacon_ies);
826262c3 4127
c65dd147
EG		 4128 if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC &&
4129 !beacon_ies) {
4130 /*
4131 * Wait up to one beacon interval ...
4132 * should this be more if we miss one?
4133 */
4134 sdata_info(sdata, "waiting for beacon from %pM\n",
4135 ifmgd->bssid);
4136 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
89afe614 4137 assoc_data->timeout_started = true;
c65dd147
EG		 4138 assoc_data->need_beacon = true;
4139 } else if (beacon_ies) {
4140 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4141 beacon_ies->data,
4142 beacon_ies->len);
ef429dad
JB		 4143 u8 dtim_count = 0;
4144
c65dd147
EG		 4145 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4146 const struct ieee80211_tim_ie *tim;
4147 tim = (void *)(tim_ie + 2);
4148 ifmgd->dtim_period = tim->dtim_period;
ef429dad 4149 dtim_count = tim->dtim_count;
826262c3 4150 }
66e67e41 4151 assoc_data->have_beacon = true;
66e67e41 4152 assoc_data->timeout = jiffies;
89afe614 4153 assoc_data->timeout_started = true;
ef429dad
JB		 4154
4155 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
4156 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4157 sdata->vif.bss_conf.sync_device_ts =
4158 bss->device_ts_beacon;
4159 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4160 }
c65dd147
EG		 4161 } else {
4162 assoc_data->timeout = jiffies;
89afe614 4163 assoc_data->timeout_started = true;
66e67e41 4164 }
c65dd147
EG		 4165 rcu_read_unlock();
4166
66e67e41
JB		 4167 run_again(ifmgd, assoc_data->timeout);
4168
fcff4f10
PS		 4169 if (bss->corrupt_data) {
4170 char *corrupt_type = "data";
4171 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4172 if (bss->corrupt_data &
4173 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4174 corrupt_type = "beacon and probe response";
4175 else
4176 corrupt_type = "beacon";
4177 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4178 corrupt_type = "probe response";
bdcbd8e0
JB		 4179 sdata_info(sdata, "associating with AP with corrupt %s\n",
4180 corrupt_type);
fcff4f10
PS		 4181 }
4182
66e67e41
JB		 4183 err = 0;
4184 goto out;
4185 err_clear:
3d2abdfd
EP		 4186 memset(ifmgd->bssid, 0, ETH_ALEN);
4187 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 4188 ifmgd->assoc_data = NULL;
4189 err_free:
4190 kfree(assoc_data);
4191 out:
4192 mutex_unlock(&ifmgd->mtx);
4193
4194 return err;
f0706e82
JB		 4195}
4196
77fdaa12 4197int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
63c9c5e7 4198 struct cfg80211_deauth_request *req)
f0706e82 4199{
46900298 4200 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 4201 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
6863255b 4202 bool tx = !req->local_state_change;
86552017 4203 bool sent_frame = false;
f0706e82 4204
77fdaa12
JB		 4205 mutex_lock(&ifmgd->mtx);
4206
bdcbd8e0
JB		 4207 sdata_info(sdata,
4208 "deauthenticating from %pM by local choice (reason=%d)\n",
4209 req->bssid, req->reason_code);
0ff71613 4210
86552017 4211 if (ifmgd->auth_data) {
8c7d857c 4212 drv_mgd_prepare_tx(sdata->local, sdata);
37ad3888
JB		 4213 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4214 IEEE80211_STYPE_DEAUTH,
6863255b 4215 req->reason_code, tx,
37ad3888 4216 frame_buf);
86552017
JB		 4217 ieee80211_destroy_auth_data(sdata, false);
4218 mutex_unlock(&ifmgd->mtx);
4219
4220 sent_frame = tx;
4221 goto out;
8c7d857c
EG		 4222 }
4223
86552017
JB		 4224 if (ifmgd->associated &&
4225 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
4226 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4227 req->reason_code, tx, frame_buf);
4228 sent_frame = tx;
4229 }
37ad3888
JB		 4230 mutex_unlock(&ifmgd->mtx);
4231
86552017 4232 out:
86552017
JB		 4233 if (sent_frame)
4234 __cfg80211_send_deauth(sdata->dev, frame_buf,
4235 IEEE80211_DEAUTH_FRAME_LEN);
4236
f0706e82
JB		 4237 return 0;
4238}
84363e6e 4239
77fdaa12 4240int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 4241 struct cfg80211_disassoc_request *req)
9c6bd790 4242{
77fdaa12 4243 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 4244 u8 bssid[ETH_ALEN];
6ae16775 4245 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
9c6bd790 4246
77fdaa12 4247 mutex_lock(&ifmgd->mtx);
10f644a4 4248
8d8b261a
JB		 4249 /*
4250 * cfg80211 should catch this ... but it's racy since
4251 * we can receive a disassoc frame, process it, hand it
4252 * to cfg80211 while that's in a locked section already
4253 * trying to tell us that the user wants to disconnect.
4254 */
0c1ad2ca 4255 if (ifmgd->associated != req->bss) {
77fdaa12
JB		 4256 mutex_unlock(&ifmgd->mtx);
4257 return -ENOLINK;
4258 }
4259
bdcbd8e0
JB		 4260 sdata_info(sdata,
4261 "disassociating from %pM by local choice (reason=%d)\n",
4262 req->bss->bssid, req->reason_code);
0ff71613 4263
e69e95db 4264 memcpy(bssid, req->bss->bssid, ETH_ALEN);
37ad3888
JB		 4265 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4266 req->reason_code, !req->local_state_change,
4267 frame_buf);
77fdaa12 4268 mutex_unlock(&ifmgd->mtx);
10f644a4 4269
6ae16775
AQ		 4270 __cfg80211_send_disassoc(sdata->dev, frame_buf,
4271 IEEE80211_DEAUTH_FRAME_LEN);
bc83b681 4272
10f644a4
JB		 4273 return 0;
4274}
026331c4 4275
afa762f6 4276void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
54e4ffb2
JB		 4277{
4278 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4279
49921859
BG		 4280 /*
4281 * Make sure some work items will not run after this,
4282 * they will not do anything but might not have been
4283 * cancelled when disconnecting.
4284 */
4285 cancel_work_sync(&ifmgd->monitor_work);
4286 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
4287 cancel_work_sync(&ifmgd->request_smps_work);
4288 cancel_work_sync(&ifmgd->csa_connection_drop_work);
4289 cancel_work_sync(&ifmgd->chswitch_work);
4290
54e4ffb2
JB		 4291 mutex_lock(&ifmgd->mtx);
4292 if (ifmgd->assoc_data)
4293 ieee80211_destroy_assoc_data(sdata, false);
4294 if (ifmgd->auth_data)
4295 ieee80211_destroy_auth_data(sdata, false);
4296 del_timer_sync(&ifmgd->timer);
4297 mutex_unlock(&ifmgd->mtx);
4298}
4299
a97c13c3
JO		 4300void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
4301 enum nl80211_cqm_rssi_threshold_event rssi_event,
4302 gfp_t gfp)
4303{
4304 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4305
b5878a2d
JB		 4306 trace_api_cqm_rssi_notify(sdata, rssi_event);
4307
a97c13c3
JO		 4308 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
4309}
4310EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
Linux kernel - Deliverables
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