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mac80211: stop using pointers as userspace cookies
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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>
d98ad83e 8 * Copyright 2013-2014 Intel Mobile Communications GmbH
f0706e82
JB		 9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
13 */
14
5b323edb 15#include <linux/delay.h>
f0706e82
JB		 16#include <linux/if_ether.h>
17#include <linux/skbuff.h>
f0706e82 18#include <linux/if_arp.h>
f0706e82 19#include <linux/etherdevice.h>
d9b93842 20#include <linux/moduleparam.h>
d0709a65 21#include <linux/rtnetlink.h>
e8db0be1 22#include <linux/pm_qos.h>
d91f36db 23#include <linux/crc32.h>
5a0e3ad6 24#include <linux/slab.h>
bc3b2d7f 25#include <linux/export.h>
f0706e82 26#include <net/mac80211.h>
472dbc45 27#include <asm/unaligned.h>
60f8b39c 28
f0706e82 29#include "ieee80211_i.h"
24487981 30#include "driver-ops.h"
2c8dccc7
JB		 31#include "rate.h"
32#include "led.h"
f0706e82 33
1672c0e3 34#define IEEE80211_AUTH_TIMEOUT (HZ / 5)
cb236d2d 35#define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2)
1672c0e3
JB		 36#define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10)
37#define IEEE80211_AUTH_MAX_TRIES 3
38#define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
39#define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
cb236d2d 40#define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2)
1672c0e3
JB		 41#define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10)
42#define IEEE80211_ASSOC_MAX_TRIES 3
66e67e41 43
180205bd
BG		 44static int max_nullfunc_tries = 2;
45module_param(max_nullfunc_tries, int, 0644);
46MODULE_PARM_DESC(max_nullfunc_tries,
47 "Maximum nullfunc tx tries before disconnecting (reason 4).");
48
49static int max_probe_tries = 5;
50module_param(max_probe_tries, int, 0644);
51MODULE_PARM_DESC(max_probe_tries,
52 "Maximum probe tries before disconnecting (reason 4).");
b291ba11
JB		 53
54/*
7ccc8bd7
FF		 55 * Beacon loss timeout is calculated as N frames times the
56 * advertised beacon interval. This may need to be somewhat
57 * higher than what hardware might detect to account for
58 * delays in the host processing frames. But since we also
59 * probe on beacon miss before declaring the connection lost
60 * default to what we want.
b291ba11 61 */
59c1ec2b
BG		 62static int beacon_loss_count = 7;
63module_param(beacon_loss_count, int, 0644);
64MODULE_PARM_DESC(beacon_loss_count,
65 "Number of beacon intervals before we decide beacon was lost.");
7ccc8bd7 66
b291ba11
JB		 67/*
68 * Time the connection can be idle before we probe
69 * it to see if we can still talk to the AP.
70 */
d1c5091f 71#define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
b291ba11
JB		 72/*
73 * Time we wait for a probe response after sending
74 * a probe request because of beacon loss or for
75 * checking the connection still works.
76 */
180205bd
BG		 77static int probe_wait_ms = 500;
78module_param(probe_wait_ms, int, 0644);
79MODULE_PARM_DESC(probe_wait_ms,
80 "Maximum time(ms) to wait for probe response"
81 " before disconnecting (reason 4).");
f0706e82 82
17e4ec14
JM		 83/*
84 * Weight given to the latest Beacon frame when calculating average signal
85 * strength for Beacon frames received in the current BSS. This must be
86 * between 1 and 15.
87 */
88#define IEEE80211_SIGNAL_AVE_WEIGHT 3
89
391a200a
JM		 90/*
91 * How many Beacon frames need to have been used in average signal strength
92 * before starting to indicate signal change events.
93 */
94#define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
95
ca386f31
JB		 96/*
97 * We can have multiple work items (and connection probing)
98 * scheduling this timer, but we need to take care to only
99 * reschedule it when it should fire _earlier_ than it was
100 * asked for before, or if it's not pending right now. This
101 * function ensures that. Note that it then is required to
102 * run this function for all timeouts after the first one
103 * has happened -- the work that runs from this timer will
104 * do that.
105 */
8d61ffa5
JB		 106static void run_again(struct ieee80211_sub_if_data *sdata,
107 unsigned long timeout)
ca386f31 108{
8d61ffa5 109 sdata_assert_lock(sdata);
ca386f31 110
8d61ffa5
JB		 111 if (!timer_pending(&sdata->u.mgd.timer) ||
112 time_before(timeout, sdata->u.mgd.timer.expires))
113 mod_timer(&sdata->u.mgd.timer, timeout);
ca386f31
JB		 114}
115
d3a910a8 116void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
b291ba11 117{
c1288b12 118 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
b291ba11
JB		 119 return;
120
7eeff74c
JB		 121 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
122 return;
123
b291ba11 124 mod_timer(&sdata->u.mgd.bcn_mon_timer,
7ccc8bd7 125 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
b291ba11
JB		 126}
127
be099e82
LR		 128void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
129{
0c699c3a
LR		 130 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
131
8628172f
SG		 132 if (unlikely(!sdata->u.mgd.associated))
133 return;
134
448cd2e2
EP		 135 ifmgd->probe_send_count = 0;
136
be099e82
LR		 137 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
138 return;
139
140 mod_timer(&sdata->u.mgd.conn_mon_timer,
141 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
142}
143
5484e237 144static int ecw2cw(int ecw)
60f8b39c 145{
5484e237 146 return (1 << ecw) - 1;
60f8b39c
JB		 147}
148
6565ec9b
JB		 149static u32
150ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
151 struct ieee80211_supported_band *sband,
152 struct ieee80211_channel *channel,
53b954ee 153 const struct ieee80211_ht_cap *ht_cap,
6565ec9b
JB		 154 const struct ieee80211_ht_operation *ht_oper,
155 const struct ieee80211_vht_operation *vht_oper,
5cdaed1e 156 struct cfg80211_chan_def *chandef, bool tracking)
6565ec9b 157{
5cdaed1e 158 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6565ec9b 159 struct cfg80211_chan_def vht_chandef;
179b8fc7 160 struct ieee80211_sta_ht_cap sta_ht_cap;
6565ec9b
JB		 161 u32 ht_cfreq, ret;
162
179b8fc7
CRI		 163 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
164 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
165
6565ec9b
JB		 166 chandef->chan = channel;
167 chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
168 chandef->center_freq1 = channel->center_freq;
169 chandef->center_freq2 = 0;
170
179b8fc7 171 if (!ht_cap || !ht_oper || !sta_ht_cap.ht_supported) {
6565ec9b
JB		 172 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
173 goto out;
174 }
175
176 chandef->width = NL80211_CHAN_WIDTH_20;
177
53b954ee
EP		 178 if (!(ht_cap->cap_info &
179 cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40))) {
f3000e1b 180 ret = IEEE80211_STA_DISABLE_40MHZ;
7e6225a1 181 vht_chandef = *chandef;
53b954ee
EP		 182 goto out;
183 }
184
6565ec9b
JB		 185 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
186 channel->band);
187 /* check that channel matches the right operating channel */
5cdaed1e 188 if (!tracking && channel->center_freq != ht_cfreq) {
6565ec9b
JB		 189 /*
190 * It's possible that some APs are confused here;
191 * Netgear WNDR3700 sometimes reports 4 higher than
192 * the actual channel in association responses, but
193 * since we look at probe response/beacon data here
194 * it should be OK.
195 */
5cdaed1e
JB		 196 sdata_info(sdata,
197 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
198 channel->center_freq, ht_cfreq,
199 ht_oper->primary_chan, channel->band);
6565ec9b
JB		 200 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
201 goto out;
202 }
203
204 /* check 40 MHz support, if we have it */
179b8fc7 205 if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
6565ec9b
JB		 206 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
207 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
208 chandef->width = NL80211_CHAN_WIDTH_40;
209 chandef->center_freq1 += 10;
210 break;
211 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
212 chandef->width = NL80211_CHAN_WIDTH_40;
213 chandef->center_freq1 -= 10;
214 break;
215 }
216 } else {
217 /* 40 MHz (and 80 MHz) must be supported for VHT */
218 ret = IEEE80211_STA_DISABLE_VHT;
85220d71
JB		 219 /* also mark 40 MHz disabled */
220 ret |= IEEE80211_STA_DISABLE_40MHZ;
6565ec9b
JB		 221 goto out;
222 }
223
224 if (!vht_oper || !sband->vht_cap.vht_supported) {
225 ret = IEEE80211_STA_DISABLE_VHT;
226 goto out;
227 }
228
229 vht_chandef.chan = channel;
230 vht_chandef.center_freq1 =
231 ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx,
232 channel->band);
233 vht_chandef.center_freq2 = 0;
234
6565ec9b
JB		 235 switch (vht_oper->chan_width) {
236 case IEEE80211_VHT_CHANWIDTH_USE_HT:
237 vht_chandef.width = chandef->width;
cb664981 238 vht_chandef.center_freq1 = chandef->center_freq1;
6565ec9b
JB		 239 break;
240 case IEEE80211_VHT_CHANWIDTH_80MHZ:
241 vht_chandef.width = NL80211_CHAN_WIDTH_80;
242 break;
243 case IEEE80211_VHT_CHANWIDTH_160MHZ:
244 vht_chandef.width = NL80211_CHAN_WIDTH_160;
245 break;
246 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
247 vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
6553bf04
JB		 248 vht_chandef.center_freq2 =
249 ieee80211_channel_to_frequency(
250 vht_oper->center_freq_seg2_idx,
251 channel->band);
6565ec9b
JB		 252 break;
253 default:
5cdaed1e 254 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
30eb1dc2
JB		 255 sdata_info(sdata,
256 "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
257 vht_oper->chan_width);
6565ec9b
JB		 258 ret = IEEE80211_STA_DISABLE_VHT;
259 goto out;
260 }
261
262 if (!cfg80211_chandef_valid(&vht_chandef)) {
5cdaed1e 263 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
30eb1dc2
JB		 264 sdata_info(sdata,
265 "AP VHT information is invalid, disable VHT\n");
6565ec9b
JB		 266 ret = IEEE80211_STA_DISABLE_VHT;
267 goto out;
268 }
269
270 if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
271 ret = 0;
272 goto out;
273 }
274
275 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
5cdaed1e 276 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
30eb1dc2
JB		 277 sdata_info(sdata,
278 "AP VHT information doesn't match HT, disable VHT\n");
6565ec9b
JB		 279 ret = IEEE80211_STA_DISABLE_VHT;
280 goto out;
281 }
282
283 *chandef = vht_chandef;
284
285 ret = 0;
286
287out:
963a1852
JB		 288 /*
289 * When tracking the current AP, don't do any further checks if the
290 * new chandef is identical to the one we're currently using for the
291 * connection. This keeps us from playing ping-pong with regulatory,
292 * without it the following can happen (for example):
293 * - connect to an AP with 80 MHz, world regdom allows 80 MHz
294 * - AP advertises regdom US
295 * - CRDA loads regdom US with 80 MHz prohibited (old database)
296 * - the code below detects an unsupported channel, downgrades, and
297 * we disconnect from the AP in the caller
298 * - disconnect causes CRDA to reload world regdomain and the game
299 * starts anew.
300 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
301 *
302 * It seems possible that there are still scenarios with CSA or real
303 * bandwidth changes where a this could happen, but those cases are
304 * less common and wouldn't completely prevent using the AP.
305 */
306 if (tracking &&
307 cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef))
308 return ret;
309
586e01ed
JB		 310 /* don't print the message below for VHT mismatch if VHT is disabled */
311 if (ret & IEEE80211_STA_DISABLE_VHT)
312 vht_chandef = *chandef;
313
ddfe49b4
JB		 314 /*
315 * Ignore the DISABLED flag when we're already connected and only
316 * tracking the APs beacon for bandwidth changes - otherwise we
317 * might get disconnected here if we connect to an AP, update our
318 * regulatory information based on the AP's country IE and the
319 * information we have is wrong/outdated and disables the channel
320 * that we're actually using for the connection to the AP.
321 */
6565ec9b 322 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
ddfe49b4
JB		 323 tracking ? 0 :
324 IEEE80211_CHAN_DISABLED)) {
6565ec9b
JB		 325 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
326 ret = IEEE80211_STA_DISABLE_HT |
327 IEEE80211_STA_DISABLE_VHT;
b56e4b85 328 break;
6565ec9b
JB		 329 }
330
e6b7cde4 331 ret |= ieee80211_chandef_downgrade(chandef);
6565ec9b
JB		 332 }
333
5cdaed1e 334 if (chandef->width != vht_chandef.width && !tracking)
6565ec9b
JB		 335 sdata_info(sdata,
336 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
337
338 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
339 return ret;
340}
341
30eb1dc2
JB		 342static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
343 struct sta_info *sta,
53b954ee 344 const struct ieee80211_ht_cap *ht_cap,
30eb1dc2
JB		 345 const struct ieee80211_ht_operation *ht_oper,
346 const struct ieee80211_vht_operation *vht_oper,
347 const u8 *bssid, u32 *changed)
d5522e03
JB		 348{
349 struct ieee80211_local *local = sdata->local;
30eb1dc2 350 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d5522e03 351 struct ieee80211_supported_band *sband;
55de908a 352 struct ieee80211_channel *chan;
30eb1dc2 353 struct cfg80211_chan_def chandef;
9ed6bcce 354 u16 ht_opmode;
30eb1dc2
JB		 355 u32 flags;
356 enum ieee80211_sta_rx_bandwidth new_sta_bw;
357 int ret;
d5522e03 358
30eb1dc2
JB		 359 /* if HT was/is disabled, don't track any bandwidth changes */
360 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
1128958d
JB		 361 return 0;
362
30eb1dc2
JB		 363 /* don't check VHT if we associated as non-VHT station */
364 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
365 vht_oper = NULL;
366
367 if (WARN_ON_ONCE(!sta))
368 return -EINVAL;
369
017b45bb
AA		 370 /*
371 * if bss configuration changed store the new one -
372 * this may be applicable even if channel is identical
373 */
374 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
375 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
376 *changed |= BSS_CHANGED_HT;
377 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
378 }
379
f2d9330e 380 chan = sdata->vif.bss_conf.chandef.chan;
55de908a 381 sband = local->hw.wiphy->bands[chan->band];
d5522e03 382
30eb1dc2 383 /* calculate new channel (type) based on HT/VHT operation IEs */
53b954ee
EP		 384 flags = ieee80211_determine_chantype(sdata, sband, chan,
385 ht_cap, ht_oper, vht_oper,
386 &chandef, true);
30eb1dc2
JB		 387
388 /*
389 * Downgrade the new channel if we associated with restricted
390 * capabilities. For example, if we associated as a 20 MHz STA
391 * to a 40 MHz AP (due to regulatory, capabilities or config
392 * reasons) then switching to a 40 MHz channel now won't do us
393 * any good -- we couldn't use it with the AP.
394 */
395 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
396 chandef.width == NL80211_CHAN_WIDTH_80P80)
e6b7cde4 397 flags |= ieee80211_chandef_downgrade(&chandef);
30eb1dc2
JB		 398 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
399 chandef.width == NL80211_CHAN_WIDTH_160)
e6b7cde4 400 flags |= ieee80211_chandef_downgrade(&chandef);
30eb1dc2
JB		 401 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
402 chandef.width > NL80211_CHAN_WIDTH_20)
e6b7cde4 403 flags |= ieee80211_chandef_downgrade(&chandef);
30eb1dc2
JB		 404
405 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
406 return 0;
407
408 sdata_info(sdata,
409 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
410 ifmgd->bssid, chandef.chan->center_freq, chandef.width,
411 chandef.center_freq1, chandef.center_freq2);
412
413 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
414 IEEE80211_STA_DISABLE_VHT |
415 IEEE80211_STA_DISABLE_40MHZ |
416 IEEE80211_STA_DISABLE_80P80MHZ |
417 IEEE80211_STA_DISABLE_160MHZ)) ||
418 !cfg80211_chandef_valid(&chandef)) {
419 sdata_info(sdata,
420 "AP %pM changed bandwidth in a way we can't support - disconnect\n",
421 ifmgd->bssid);
422 return -EINVAL;
423 }
424
425 switch (chandef.width) {
426 case NL80211_CHAN_WIDTH_20_NOHT:
427 case NL80211_CHAN_WIDTH_20:
428 new_sta_bw = IEEE80211_STA_RX_BW_20;
429 break;
4bf88530 430 case NL80211_CHAN_WIDTH_40:
30eb1dc2 431 new_sta_bw = IEEE80211_STA_RX_BW_40;
64f68e5d 432 break;
30eb1dc2
JB		 433 case NL80211_CHAN_WIDTH_80:
434 new_sta_bw = IEEE80211_STA_RX_BW_80;
435 break;
436 case NL80211_CHAN_WIDTH_80P80:
437 case NL80211_CHAN_WIDTH_160:
438 new_sta_bw = IEEE80211_STA_RX_BW_160;
64f68e5d 439 break;
30eb1dc2
JB		 440 default:
441 return -EINVAL;
64f68e5d 442 }
d5522e03 443
30eb1dc2
JB		 444 if (new_sta_bw > sta->cur_max_bandwidth)
445 new_sta_bw = sta->cur_max_bandwidth;
64f68e5d 446
30eb1dc2
JB		 447 if (new_sta_bw < sta->sta.bandwidth) {
448 sta->sta.bandwidth = new_sta_bw;
449 rate_control_rate_update(local, sband, sta,
450 IEEE80211_RC_BW_CHANGED);
451 }
64f68e5d 452
30eb1dc2
JB		 453 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
454 if (ret) {
455 sdata_info(sdata,
456 "AP %pM changed bandwidth to incompatible one - disconnect\n",
457 ifmgd->bssid);
458 return ret;
459 }
7cc44ed4 460
30eb1dc2
JB		 461 if (new_sta_bw > sta->sta.bandwidth) {
462 sta->sta.bandwidth = new_sta_bw;
463 rate_control_rate_update(local, sband, sta,
464 IEEE80211_RC_BW_CHANGED);
0aaffa9b 465 }
d5522e03 466
30eb1dc2 467 return 0;
d5522e03
JB		 468}
469
9c6bd790
JB		 470/* frame sending functions */
471
66e67e41 472static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
9dde6423 473 struct sk_buff *skb, u8 ap_ht_param,
66e67e41
JB		 474 struct ieee80211_supported_band *sband,
475 struct ieee80211_channel *channel,
476 enum ieee80211_smps_mode smps)
477{
66e67e41
JB		 478 u8 *pos;
479 u32 flags = channel->flags;
480 u16 cap;
481 struct ieee80211_sta_ht_cap ht_cap;
482
483 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
484
66e67e41
JB		 485 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
486 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
487
66e67e41
JB		 488 /* determine capability flags */
489 cap = ht_cap.cap;
490
9dde6423 491 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
66e67e41
JB		 492 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
493 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
494 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
495 cap &= ~IEEE80211_HT_CAP_SGI_40;
496 }
497 break;
498 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
499 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
500 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
501 cap &= ~IEEE80211_HT_CAP_SGI_40;
502 }
503 break;
504 }
505
24398e39
JB		 506 /*
507 * If 40 MHz was disabled associate as though we weren't
508 * capable of 40 MHz -- some broken APs will never fall
509 * back to trying to transmit in 20 MHz.
510 */
511 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
512 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
513 cap &= ~IEEE80211_HT_CAP_SGI_40;
514 }
515
66e67e41
JB		 516 /* set SM PS mode properly */
517 cap &= ~IEEE80211_HT_CAP_SM_PS;
518 switch (smps) {
519 case IEEE80211_SMPS_AUTOMATIC:
520 case IEEE80211_SMPS_NUM_MODES:
521 WARN_ON(1);
522 case IEEE80211_SMPS_OFF:
523 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
524 IEEE80211_HT_CAP_SM_PS_SHIFT;
525 break;
526 case IEEE80211_SMPS_STATIC:
527 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
528 IEEE80211_HT_CAP_SM_PS_SHIFT;
529 break;
530 case IEEE80211_SMPS_DYNAMIC:
531 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
532 IEEE80211_HT_CAP_SM_PS_SHIFT;
533 break;
534 }
535
536 /* reserve and fill IE */
537 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
538 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
539}
540
d545daba
MP		 541static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
542 struct sk_buff *skb,
b08fbbd8
JB		 543 struct ieee80211_supported_band *sband,
544 struct ieee80211_vht_cap *ap_vht_cap)
d545daba
MP		 545{
546 u8 *pos;
547 u32 cap;
548 struct ieee80211_sta_vht_cap vht_cap;
c1cf6d4e 549 u32 mask, ap_bf_sts, our_bf_sts;
d545daba
MP		 550
551 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
552
553 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
dd5ecfea 554 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
d545daba
MP		 555
556 /* determine capability flags */
557 cap = vht_cap.cap;
558
f2d9d270 559 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
575f0530
JB		 560 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
561
562 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
563 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ ||
564 bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
565 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
f2d9d270
JB		 566 }
567
568 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
569 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
575f0530 570 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
f2d9d270
JB		 571 }
572
b08fbbd8
JB		 573 /*
574 * Some APs apparently get confused if our capabilities are better
575 * than theirs, so restrict what we advertise in the assoc request.
576 */
577 if (!(ap_vht_cap->vht_cap_info &
578 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
579 cap &= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE;
580
c1cf6d4e
ES		 581 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK;
582
583 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask;
584 our_bf_sts = cap & mask;
585
586 if (ap_bf_sts < our_bf_sts) {
587 cap &= ~mask;
588 cap |= ap_bf_sts;
589 }
590
d545daba 591 /* reserve and fill IE */
d4950281 592 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
d545daba
MP		 593 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
594}
595
66e67e41
JB		 596static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
597{
598 struct ieee80211_local *local = sdata->local;
599 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
600 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
601 struct sk_buff *skb;
602 struct ieee80211_mgmt *mgmt;
603 u8 *pos, qos_info;
604 size_t offset = 0, noffset;
2103dec1 605 int i, count, rates_len, supp_rates_len, shift;
66e67e41
JB		 606 u16 capab;
607 struct ieee80211_supported_band *sband;
55de908a
JB		 608 struct ieee80211_chanctx_conf *chanctx_conf;
609 struct ieee80211_channel *chan;
2103dec1 610 u32 rate_flags, rates = 0;
66e67e41 611
8d61ffa5 612 sdata_assert_lock(sdata);
66e67e41 613
55de908a
JB		 614 rcu_read_lock();
615 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
616 if (WARN_ON(!chanctx_conf)) {
617 rcu_read_unlock();
618 return;
619 }
4bf88530 620 chan = chanctx_conf->def.chan;
2103dec1 621 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
55de908a
JB		 622 rcu_read_unlock();
623 sband = local->hw.wiphy->bands[chan->band];
2103dec1 624 shift = ieee80211_vif_get_shift(&sdata->vif);
66e67e41
JB		 625
626 if (assoc_data->supp_rates_len) {
627 /*
628 * Get all rates supported by the device and the AP as
629 * some APs don't like getting a superset of their rates
630 * in the association request (e.g. D-Link DAP 1353 in
631 * b-only mode)...
632 */
2103dec1
SW		 633 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
634 assoc_data->supp_rates,
635 assoc_data->supp_rates_len,
636 &rates);
66e67e41
JB		 637 } else {
638 /*
639 * In case AP not provide any supported rates information
640 * before association, we send information element(s) with
641 * all rates that we support.
642 */
2103dec1
SW		 643 rates_len = 0;
644 for (i = 0; i < sband->n_bitrates; i++) {
645 if ((rate_flags & sband->bitrates[i].flags)
646 != rate_flags)
647 continue;
648 rates |= BIT(i);
649 rates_len++;
650 }
66e67e41
JB		 651 }
652
653 skb = alloc_skb(local->hw.extra_tx_headroom +
654 sizeof(*mgmt) + /* bit too much but doesn't matter */
655 2 + assoc_data->ssid_len + /* SSID */
656 4 + rates_len + /* (extended) rates */
657 4 + /* power capability */
658 2 + 2 * sband->n_channels + /* supported channels */
659 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
d4950281 660 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
66e67e41
JB		 661 assoc_data->ie_len + /* extra IEs */
662 9, /* WMM */
663 GFP_KERNEL);
664 if (!skb)
665 return;
666
667 skb_reserve(skb, local->hw.extra_tx_headroom);
668
669 capab = WLAN_CAPABILITY_ESS;
670
671 if (sband->band == IEEE80211_BAND_2GHZ) {
672 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
673 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
674 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
675 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
676 }
677
678 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
679 capab |= WLAN_CAPABILITY_PRIVACY;
680
681 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
682 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
683 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
684
cd2f5dd7
AK		 685 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM)
686 capab |= WLAN_CAPABILITY_RADIO_MEASURE;
687
66e67e41
JB		 688 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
689 memset(mgmt, 0, 24);
690 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
691 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
692 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
693
694 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
695 skb_put(skb, 10);
696 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
697 IEEE80211_STYPE_REASSOC_REQ);
698 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
699 mgmt->u.reassoc_req.listen_interval =
700 cpu_to_le16(local->hw.conf.listen_interval);
701 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
702 ETH_ALEN);
703 } else {
704 skb_put(skb, 4);
705 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
706 IEEE80211_STYPE_ASSOC_REQ);
707 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
708 mgmt->u.assoc_req.listen_interval =
709 cpu_to_le16(local->hw.conf.listen_interval);
710 }
711
712 /* SSID */
713 pos = skb_put(skb, 2 + assoc_data->ssid_len);
714 *pos++ = WLAN_EID_SSID;
715 *pos++ = assoc_data->ssid_len;
716 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
717
718 /* add all rates which were marked to be used above */
719 supp_rates_len = rates_len;
720 if (supp_rates_len > 8)
721 supp_rates_len = 8;
722
723 pos = skb_put(skb, supp_rates_len + 2);
724 *pos++ = WLAN_EID_SUPP_RATES;
725 *pos++ = supp_rates_len;
726
727 count = 0;
728 for (i = 0; i < sband->n_bitrates; i++) {
729 if (BIT(i) & rates) {
2103dec1
SW		 730 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
731 5 * (1 << shift));
732 *pos++ = (u8) rate;
66e67e41
JB		 733 if (++count == 8)
734 break;
735 }
736 }
737
738 if (rates_len > count) {
739 pos = skb_put(skb, rates_len - count + 2);
740 *pos++ = WLAN_EID_EXT_SUPP_RATES;
741 *pos++ = rates_len - count;
742
743 for (i++; i < sband->n_bitrates; i++) {
744 if (BIT(i) & rates) {
2103dec1
SW		 745 int rate;
746 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
747 5 * (1 << shift));
748 *pos++ = (u8) rate;
66e67e41
JB		 749 }
750 }
751 }
752
cd2f5dd7
AK		 753 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT ||
754 capab & WLAN_CAPABILITY_RADIO_MEASURE) {
66e67e41
JB		 755 pos = skb_put(skb, 4);
756 *pos++ = WLAN_EID_PWR_CAPABILITY;
757 *pos++ = 2;
758 *pos++ = 0; /* min tx power */
0430c883
SW		 759 /* max tx power */
760 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
cd2f5dd7 761 }
66e67e41 762
cd2f5dd7 763 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
66e67e41
JB		 764 /* TODO: get this in reg domain format */
765 pos = skb_put(skb, 2 * sband->n_channels + 2);
766 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
767 *pos++ = 2 * sband->n_channels;
768 for (i = 0; i < sband->n_channels; i++) {
769 *pos++ = ieee80211_frequency_to_channel(
770 sband->channels[i].center_freq);
771 *pos++ = 1; /* one channel in the subband*/
772 }
773 }
774
775 /* if present, add any custom IEs that go before HT */
b3f51e94 776 if (assoc_data->ie_len) {
66e67e41
JB		 777 static const u8 before_ht[] = {
778 WLAN_EID_SSID,
779 WLAN_EID_SUPP_RATES,
780 WLAN_EID_EXT_SUPP_RATES,
781 WLAN_EID_PWR_CAPABILITY,
782 WLAN_EID_SUPPORTED_CHANNELS,
783 WLAN_EID_RSN,
784 WLAN_EID_QOS_CAPA,
785 WLAN_EID_RRM_ENABLED_CAPABILITIES,
786 WLAN_EID_MOBILITY_DOMAIN,
8ed28747
JB		 787 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */
788 WLAN_EID_RIC_DATA, /* reassoc only */
66e67e41
JB		 789 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
790 };
8ed28747
JB		 791 static const u8 after_ric[] = {
792 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
793 WLAN_EID_HT_CAPABILITY,
794 WLAN_EID_BSS_COEX_2040,
795 WLAN_EID_EXT_CAPABILITY,
796 WLAN_EID_QOS_TRAFFIC_CAPA,
797 WLAN_EID_TIM_BCAST_REQ,
798 WLAN_EID_INTERWORKING,
799 /* 60GHz doesn't happen right now */
800 WLAN_EID_VHT_CAPABILITY,
801 WLAN_EID_OPMODE_NOTIF,
802 };
803
804 noffset = ieee80211_ie_split_ric(assoc_data->ie,
805 assoc_data->ie_len,
806 before_ht,
807 ARRAY_SIZE(before_ht),
808 after_ric,
809 ARRAY_SIZE(after_ric),
810 offset);
66e67e41
JB		 811 pos = skb_put(skb, noffset - offset);
812 memcpy(pos, assoc_data->ie + offset, noffset - offset);
813 offset = noffset;
814 }
815
f2d9d270
JB		 816 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
817 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
818 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
819
a8243b72 820 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
9dde6423 821 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
04ecd257 822 sband, chan, sdata->smps_mode);
66e67e41 823
3de3802c
JB		 824 /* if present, add any custom IEs that go before VHT */
825 if (assoc_data->ie_len) {
826 static const u8 before_vht[] = {
827 WLAN_EID_SSID,
828 WLAN_EID_SUPP_RATES,
829 WLAN_EID_EXT_SUPP_RATES,
830 WLAN_EID_PWR_CAPABILITY,
831 WLAN_EID_SUPPORTED_CHANNELS,
832 WLAN_EID_RSN,
833 WLAN_EID_QOS_CAPA,
834 WLAN_EID_RRM_ENABLED_CAPABILITIES,
835 WLAN_EID_MOBILITY_DOMAIN,
836 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
837 WLAN_EID_HT_CAPABILITY,
838 WLAN_EID_BSS_COEX_2040,
839 WLAN_EID_EXT_CAPABILITY,
840 WLAN_EID_QOS_TRAFFIC_CAPA,
841 WLAN_EID_TIM_BCAST_REQ,
842 WLAN_EID_INTERWORKING,
843 };
8ed28747
JB		 844
845 /* RIC already taken above, so no need to handle here anymore */
3de3802c
JB		 846 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
847 before_vht, ARRAY_SIZE(before_vht),
848 offset);
849 pos = skb_put(skb, noffset - offset);
850 memcpy(pos, assoc_data->ie + offset, noffset - offset);
851 offset = noffset;
852 }
853
d545daba 854 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
b08fbbd8
JB		 855 ieee80211_add_vht_ie(sdata, skb, sband,
856 &assoc_data->ap_vht_cap);
d545daba 857
66e67e41 858 /* if present, add any custom non-vendor IEs that go after HT */
b3f51e94 859 if (assoc_data->ie_len) {
66e67e41
JB		 860 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
861 assoc_data->ie_len,
862 offset);
863 pos = skb_put(skb, noffset - offset);
864 memcpy(pos, assoc_data->ie + offset, noffset - offset);
865 offset = noffset;
866 }
867
76f0303d
JB		 868 if (assoc_data->wmm) {
869 if (assoc_data->uapsd) {
dc41e4d4
EP		 870 qos_info = ifmgd->uapsd_queues;
871 qos_info |= (ifmgd->uapsd_max_sp_len <<
66e67e41
JB		 872 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
873 } else {
874 qos_info = 0;
875 }
876
40b861a0 877 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
66e67e41
JB		 878 }
879
880 /* add any remaining custom (i.e. vendor specific here) IEs */
b3f51e94 881 if (assoc_data->ie_len) {
66e67e41
JB		 882 noffset = assoc_data->ie_len;
883 pos = skb_put(skb, noffset - offset);
884 memcpy(pos, assoc_data->ie + offset, noffset - offset);
885 }
886
a1845fc7
JB		 887 drv_mgd_prepare_tx(local, sdata);
888
66e67e41 889 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1672c0e3
JB		 890 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
891 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
892 IEEE80211_TX_INTFL_MLME_CONN_TX;
66e67e41
JB		 893 ieee80211_tx_skb(sdata, skb);
894}
895
572e0012
KV		 896void ieee80211_send_pspoll(struct ieee80211_local *local,
897 struct ieee80211_sub_if_data *sdata)
898{
572e0012
KV		 899 struct ieee80211_pspoll *pspoll;
900 struct sk_buff *skb;
572e0012 901
d8cd189e
KV		 902 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
903 if (!skb)
572e0012 904 return;
572e0012 905
d8cd189e
KV		 906 pspoll = (struct ieee80211_pspoll *) skb->data;
907 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
572e0012 908
62ae67be
JB		 909 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
910 ieee80211_tx_skb(sdata, skb);
572e0012
KV		 911}
912
965bedad
JB		 913void ieee80211_send_nullfunc(struct ieee80211_local *local,
914 struct ieee80211_sub_if_data *sdata,
915 int powersave)
916{
917 struct sk_buff *skb;
d8cd189e 918 struct ieee80211_hdr_3addr *nullfunc;
b6f35301 919 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
965bedad 920
d8cd189e
KV		 921 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
922 if (!skb)
965bedad 923 return;
965bedad 924
d8cd189e 925 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
965bedad 926 if (powersave)
d8cd189e 927 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
965bedad 928
6c17b77b
SF		 929 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
930 IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
ff40b425
PF		 931
932 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
933 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
934
392b9ffb 935 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
b6f35301
RM		 936 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
937
62ae67be 938 ieee80211_tx_skb(sdata, skb);
965bedad
JB		 939}
940
d524215f
FF		 941static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
942 struct ieee80211_sub_if_data *sdata)
943{
944 struct sk_buff *skb;
945 struct ieee80211_hdr *nullfunc;
946 __le16 fc;
947
948 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
949 return;
950
951 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
d15b8459 952 if (!skb)
d524215f 953 return;
d15b8459 954
d524215f
FF		 955 skb_reserve(skb, local->hw.extra_tx_headroom);
956
957 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
958 memset(nullfunc, 0, 30);
959 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
960 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
961 nullfunc->frame_control = fc;
962 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
963 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
964 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
965 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
966
967 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
968 ieee80211_tx_skb(sdata, skb);
969}
970
cc32abd4
JB		 971/* spectrum management related things */
972static void ieee80211_chswitch_work(struct work_struct *work)
973{
974 struct ieee80211_sub_if_data *sdata =
975 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
675a0b04 976 struct ieee80211_local *local = sdata->local;
cc32abd4 977 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
7578d575 978 int ret;
cc32abd4 979
9607e6b6 980 if (!ieee80211_sdata_running(sdata))
cc32abd4
JB		 981 return;
982
8d61ffa5 983 sdata_lock(sdata);
4c3ebc56
MK		 984 mutex_lock(&local->mtx);
985 mutex_lock(&local->chanctx_mtx);
986
77fdaa12
JB		 987 if (!ifmgd->associated)
988 goto out;
cc32abd4 989
4c3ebc56
MK		 990 if (!sdata->vif.csa_active)
991 goto out;
992
993 /*
994 * using reservation isn't immediate as it may be deferred until later
995 * with multi-vif. once reservation is complete it will re-schedule the
996 * work with no reserved_chanctx so verify chandef to check if it
997 * completed successfully
998 */
999
1000 if (sdata->reserved_chanctx) {
1001 /*
1002 * with multi-vif csa driver may call ieee80211_csa_finish()
1003 * many times while waiting for other interfaces to use their
1004 * reservations
1005 */
1006 if (sdata->reserved_ready)
1007 goto out;
1008
1009 ret = ieee80211_vif_use_reserved_context(sdata);
1010 if (ret) {
1011 sdata_info(sdata,
1012 "failed to use reserved channel context, disconnecting (err=%d)\n",
1013 ret);
1014 ieee80211_queue_work(&sdata->local->hw,
1015 &ifmgd->csa_connection_drop_work);
1016 goto out;
1017 }
1018
1019 goto out;
1020 }
1021
1022 if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
1023 &sdata->csa_chandef)) {
7578d575 1024 sdata_info(sdata,
4c3ebc56 1025 "failed to finalize channel switch, disconnecting\n");
7578d575
AN		 1026 ieee80211_queue_work(&sdata->local->hw,
1027 &ifmgd->csa_connection_drop_work);
1028 goto out;
1029 }
675a0b04 1030
cc32abd4 1031 /* XXX: shouldn't really modify cfg80211-owned data! */
33787fc4 1032 ifmgd->associated->channel = sdata->csa_chandef.chan;
cc32abd4 1033
0c21e632
LC		 1034 ifmgd->csa_waiting_bcn = true;
1035
1036 ieee80211_sta_reset_beacon_monitor(sdata);
1037 ieee80211_sta_reset_conn_monitor(sdata);
1038
1039out:
1040 mutex_unlock(&local->chanctx_mtx);
1041 mutex_unlock(&local->mtx);
1042 sdata_unlock(sdata);
1043}
1044
1045static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata)
1046{
1047 struct ieee80211_local *local = sdata->local;
1048 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1049 int ret;
1050
1051 sdata_assert_lock(sdata);
1052
1053 WARN_ON(!sdata->vif.csa_active);
4c3ebc56 1054
a46992b4
LC		 1055 if (sdata->csa_block_tx) {
1056 ieee80211_wake_vif_queues(local, sdata,
1057 IEEE80211_QUEUE_STOP_REASON_CSA);
1058 sdata->csa_block_tx = false;
1059 }
7578d575 1060
0c21e632
LC		 1061 sdata->vif.csa_active = false;
1062 ifmgd->csa_waiting_bcn = false;
1063
f1d65583
LC		 1064 ret = drv_post_channel_switch(sdata);
1065 if (ret) {
1066 sdata_info(sdata,
1067 "driver post channel switch failed, disconnecting\n");
1068 ieee80211_queue_work(&local->hw,
1069 &ifmgd->csa_connection_drop_work);
0c21e632 1070 return;
f1d65583 1071 }
688b1ecf
LC		 1072
1073 cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef);
cc32abd4
JB		 1074}
1075
5ce6e438
JB		 1076void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1077{
55de908a
JB		 1078 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1079 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5ce6e438
JB		 1080
1081 trace_api_chswitch_done(sdata, success);
1082 if (!success) {
882a7c69
JB		 1083 sdata_info(sdata,
1084 "driver channel switch failed, disconnecting\n");
1085 ieee80211_queue_work(&sdata->local->hw,
1086 &ifmgd->csa_connection_drop_work);
1087 } else {
1088 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
5ce6e438 1089 }
5ce6e438
JB		 1090}
1091EXPORT_SYMBOL(ieee80211_chswitch_done);
1092
cc32abd4
JB		 1093static void ieee80211_chswitch_timer(unsigned long data)
1094{
1095 struct ieee80211_sub_if_data *sdata =
1096 (struct ieee80211_sub_if_data *) data;
5bb644a0 1097
9b7d72c1 1098 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
cc32abd4
JB		 1099}
1100
c5a71688
AN		 1101static void ieee80211_teardown_tdls_peers(struct ieee80211_sub_if_data *sdata)
1102{
1103 struct sta_info *sta;
1104 u16 reason = WLAN_REASON_TDLS_TEARDOWN_UNSPECIFIED;
1105
1106 rcu_read_lock();
1107 list_for_each_entry_rcu(sta, &sdata->local->sta_list, list) {
1108 if (!sta->sta.tdls || sta->sdata != sdata || !sta->uploaded ||
1109 !test_sta_flag(sta, WLAN_STA_AUTHORIZED))
1110 continue;
1111
1112 ieee80211_tdls_oper_request(&sdata->vif, sta->sta.addr,
1113 NL80211_TDLS_TEARDOWN, reason,
1114 GFP_ATOMIC);
1115 }
1116 rcu_read_unlock();
1117}
1118
37799e52 1119static void
4a3cb702 1120ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
2ba45384
LC		 1121 u64 timestamp, u32 device_timestamp,
1122 struct ieee802_11_elems *elems,
04a161f4 1123 bool beacon)
cc32abd4 1124{
b4f286a1 1125 struct ieee80211_local *local = sdata->local;
cc32abd4 1126 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
37799e52 1127 struct cfg80211_bss *cbss = ifmgd->associated;
4c3ebc56 1128 struct ieee80211_chanctx_conf *conf;
55de908a 1129 struct ieee80211_chanctx *chanctx;
e6b7cde4 1130 enum ieee80211_band current_band;
c0f17eb9 1131 struct ieee80211_csa_ie csa_ie;
6d027bcc 1132 struct ieee80211_channel_switch ch_switch;
e6b7cde4 1133 int res;
cc32abd4 1134
8d61ffa5 1135 sdata_assert_lock(sdata);
77fdaa12 1136
37799e52 1137 if (!cbss)
cc32abd4
JB		 1138 return;
1139
b4f286a1 1140 if (local->scanning)
cc32abd4
JB		 1141 return;
1142
37799e52 1143 /* disregard subsequent announcements if we are already processing */
3e2a0226 1144 if (sdata->vif.csa_active)
cc32abd4
JB		 1145 return;
1146
e6b7cde4 1147 current_band = cbss->channel->band;
c0f17eb9 1148 memset(&csa_ie, 0, sizeof(csa_ie));
84469a45 1149 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band,
e6b7cde4 1150 ifmgd->flags,
c0f17eb9 1151 ifmgd->associated->bssid, &csa_ie);
e6b7cde4 1152 if (res < 0)
b4f286a1 1153 ieee80211_queue_work(&local->hw,
882a7c69 1154 &ifmgd->csa_connection_drop_work);
e6b7cde4 1155 if (res)
cc32abd4 1156 return;
cd64f2a9 1157
c0f17eb9 1158 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
85220d71
JB		 1159 IEEE80211_CHAN_DISABLED)) {
1160 sdata_info(sdata,
1161 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
e6b7cde4 1162 ifmgd->associated->bssid,
c0f17eb9
CYY		 1163 csa_ie.chandef.chan->center_freq,
1164 csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1165 csa_ie.chandef.center_freq2);
85220d71
JB		 1166 ieee80211_queue_work(&local->hw,
1167 &ifmgd->csa_connection_drop_work);
1168 return;
1169 }
1170
f84eaa10
JB		 1171 if (cfg80211_chandef_identical(&csa_ie.chandef,
1172 &sdata->vif.bss_conf.chandef)) {
1173 if (ifmgd->csa_ignored_same_chan)
1174 return;
1175 sdata_info(sdata,
1176 "AP %pM tries to chanswitch to same channel, ignore\n",
1177 ifmgd->associated->bssid);
1178 ifmgd->csa_ignored_same_chan = true;
1179 return;
1180 }
1181
c5a71688
AN		 1182 /*
1183 * Drop all TDLS peers - either we disconnect or move to a different
1184 * channel from this point on. There's no telling what our peer will do.
1185 * The TDLS WIDER_BW scenario is also problematic, as peers might now
1186 * have an incompatible wider chandef.
1187 */
1188 ieee80211_teardown_tdls_peers(sdata);
1189
4c3ebc56 1190 mutex_lock(&local->mtx);
7578d575 1191 mutex_lock(&local->chanctx_mtx);
4c3ebc56
MK		 1192 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1193 lockdep_is_held(&local->chanctx_mtx));
1194 if (!conf) {
1195 sdata_info(sdata,
1196 "no channel context assigned to vif?, disconnecting\n");
f3b0bbb3 1197 goto drop_connection;
4c3ebc56
MK		 1198 }
1199
1200 chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1201
0f791eb4
LC		 1202 if (local->use_chanctx &&
1203 !(local->hw.flags & IEEE80211_HW_CHANCTX_STA_CSA)) {
1204 sdata_info(sdata,
1205 "driver doesn't support chan-switch with channel contexts\n");
f3b0bbb3 1206 goto drop_connection;
55de908a
JB		 1207 }
1208
6d027bcc
LC		 1209 ch_switch.timestamp = timestamp;
1210 ch_switch.device_timestamp = device_timestamp;
1211 ch_switch.block_tx = csa_ie.mode;
1212 ch_switch.chandef = csa_ie.chandef;
1213 ch_switch.count = csa_ie.count;
1214
1215 if (drv_pre_channel_switch(sdata, &ch_switch)) {
1216 sdata_info(sdata,
1217 "preparing for channel switch failed, disconnecting\n");
f3b0bbb3 1218 goto drop_connection;
6d027bcc
LC		 1219 }
1220
4c3ebc56
MK		 1221 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1222 chanctx->mode, false);
1223 if (res) {
55de908a 1224 sdata_info(sdata,
4c3ebc56
MK		 1225 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1226 res);
f3b0bbb3 1227 goto drop_connection;
55de908a 1228 }
b4f286a1 1229 mutex_unlock(&local->chanctx_mtx);
55de908a 1230
c46a73f3 1231 sdata->vif.csa_active = true;
4c3ebc56 1232 sdata->csa_chandef = csa_ie.chandef;
59af6928 1233 sdata->csa_block_tx = csa_ie.mode;
f84eaa10 1234 ifmgd->csa_ignored_same_chan = false;
55de908a 1235
59af6928 1236 if (sdata->csa_block_tx)
a46992b4
LC		 1237 ieee80211_stop_vif_queues(local, sdata,
1238 IEEE80211_QUEUE_STOP_REASON_CSA);
59af6928 1239 mutex_unlock(&local->mtx);
57eebdf3 1240
2f457293
LC		 1241 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef,
1242 csa_ie.count);
1243
b4f286a1 1244 if (local->ops->channel_switch) {
5ce6e438 1245 /* use driver's channel switch callback */
0f791eb4 1246 drv_channel_switch(local, sdata, &ch_switch);
5ce6e438
JB		 1247 return;
1248 }
1249
1250 /* channel switch handled in software */
c0f17eb9 1251 if (csa_ie.count <= 1)
b4f286a1 1252 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
57eebdf3 1253 else
cc32abd4 1254 mod_timer(&ifmgd->chswitch_timer,
ff1e417c
LC		 1255 TU_TO_EXP_TIME((csa_ie.count - 1) *
1256 cbss->beacon_interval));
f3b0bbb3
JB		 1257 return;
1258 drop_connection:
1259 ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work);
1260 mutex_unlock(&local->chanctx_mtx);
1261 mutex_unlock(&local->mtx);
cc32abd4
JB		 1262}
1263
24a4e400
SG		 1264static bool
1265ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1266 struct ieee80211_channel *channel,
1267 const u8 *country_ie, u8 country_ie_len,
1268 const u8 *pwr_constr_elem,
1269 int *chan_pwr, int *pwr_reduction)
cc32abd4 1270{
04b7b2ff
JB		 1271 struct ieee80211_country_ie_triplet *triplet;
1272 int chan = ieee80211_frequency_to_channel(channel->center_freq);
24a4e400 1273 int i, chan_increment;
04b7b2ff 1274 bool have_chan_pwr = false;
cc32abd4 1275
04b7b2ff
JB		 1276 /* Invalid IE */
1277 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
24a4e400 1278 return false;
cc32abd4 1279
04b7b2ff
JB		 1280 triplet = (void *)(country_ie + 3);
1281 country_ie_len -= 3;
1282
1283 switch (channel->band) {
1284 default:
1285 WARN_ON_ONCE(1);
1286 /* fall through */
1287 case IEEE80211_BAND_2GHZ:
1288 case IEEE80211_BAND_60GHZ:
1289 chan_increment = 1;
1290 break;
1291 case IEEE80211_BAND_5GHZ:
1292 chan_increment = 4;
1293 break;
cc32abd4 1294 }
04b7b2ff
JB		 1295
1296 /* find channel */
1297 while (country_ie_len >= 3) {
1298 u8 first_channel = triplet->chans.first_channel;
1299
1300 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1301 goto next;
1302
1303 for (i = 0; i < triplet->chans.num_channels; i++) {
1304 if (first_channel + i * chan_increment == chan) {
1305 have_chan_pwr = true;
24a4e400 1306 *chan_pwr = triplet->chans.max_power;
04b7b2ff
JB		 1307 break;
1308 }
1309 }
1310 if (have_chan_pwr)
1311 break;
1312
1313 next:
1314 triplet++;
1315 country_ie_len -= 3;
1316 }
1317
a5fee9cb 1318 if (have_chan_pwr && pwr_constr_elem)
24a4e400 1319 *pwr_reduction = *pwr_constr_elem;
a5fee9cb
MB		 1320 else
1321 *pwr_reduction = 0;
1322
24a4e400
SG		 1323 return have_chan_pwr;
1324}
1325
c8d65917
SG		 1326static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
1327 struct ieee80211_channel *channel,
1328 const u8 *cisco_dtpc_ie,
1329 int *pwr_level)
1330{
1331 /* From practical testing, the first data byte of the DTPC element
1332 * seems to contain the requested dBm level, and the CLI on Cisco
1333 * APs clearly state the range is -127 to 127 dBm, which indicates
1334 * a signed byte, although it seemingly never actually goes negative.
1335 * The other byte seems to always be zero.
1336 */
1337 *pwr_level = (__s8)cisco_dtpc_ie[4];
1338}
1339
24a4e400
SG		 1340static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1341 struct ieee80211_channel *channel,
1342 struct ieee80211_mgmt *mgmt,
1343 const u8 *country_ie, u8 country_ie_len,
c8d65917
SG		 1344 const u8 *pwr_constr_ie,
1345 const u8 *cisco_dtpc_ie)
24a4e400 1346{
c8d65917
SG		 1347 bool has_80211h_pwr = false, has_cisco_pwr = false;
1348 int chan_pwr = 0, pwr_reduction_80211h = 0;
1349 int pwr_level_cisco, pwr_level_80211h;
24a4e400 1350 int new_ap_level;
a5fee9cb 1351 __le16 capab = mgmt->u.probe_resp.capab_info;
04b7b2ff 1352
a5fee9cb
MB		 1353 if (country_ie &&
1354 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) ||
1355 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) {
24a4e400
SG		 1356 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
1357 sdata, channel, country_ie, country_ie_len,
1358 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
c8d65917
SG		 1359 pwr_level_80211h =
1360 max_t(int, 0, chan_pwr - pwr_reduction_80211h);
1361 }
1362
1363 if (cisco_dtpc_ie) {
1364 ieee80211_find_cisco_dtpc(
1365 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
1366 has_cisco_pwr = true;
24a4e400 1367 }
04b7b2ff 1368
c8d65917 1369 if (!has_80211h_pwr && !has_cisco_pwr)
1ea6f9c0 1370 return 0;
04b7b2ff 1371
c8d65917
SG		 1372 /* If we have both 802.11h and Cisco DTPC, apply both limits
1373 * by picking the smallest of the two power levels advertised.
1374 */
1375 if (has_80211h_pwr &&
1376 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
cef2fc1c
JL		 1377 sdata_dbg(sdata,
1378 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1379 pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
1380 sdata->u.mgd.bssid);
c8d65917
SG		 1381 new_ap_level = pwr_level_80211h;
1382 } else { /* has_cisco_pwr is always true here. */
cef2fc1c
JL		 1383 sdata_dbg(sdata,
1384 "Limiting TX power to %d dBm as advertised by %pM\n",
1385 pwr_level_cisco, sdata->u.mgd.bssid);
c8d65917
SG		 1386 new_ap_level = pwr_level_cisco;
1387 }
04b7b2ff 1388
1ea6f9c0
JB		 1389 if (sdata->ap_power_level == new_ap_level)
1390 return 0;
04b7b2ff 1391
1ea6f9c0
JB		 1392 sdata->ap_power_level = new_ap_level;
1393 if (__ieee80211_recalc_txpower(sdata))
1394 return BSS_CHANGED_TXPOWER;
1395 return 0;
cc32abd4
JB		 1396}
1397
965bedad
JB		 1398/* powersave */
1399static void ieee80211_enable_ps(struct ieee80211_local *local,
1400 struct ieee80211_sub_if_data *sdata)
1401{
1402 struct ieee80211_conf *conf = &local->hw.conf;
1403
d5edaedc
JB		 1404 /*
1405 * If we are scanning right now then the parameters will
1406 * take effect when scan finishes.
1407 */
fbe9c429 1408 if (local->scanning)
d5edaedc
JB		 1409 return;
1410
965bedad
JB		 1411 if (conf->dynamic_ps_timeout > 0 &&
1412 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
1413 mod_timer(&local->dynamic_ps_timer, jiffies +
1414 msecs_to_jiffies(conf->dynamic_ps_timeout));
1415 } else {
1416 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1417 ieee80211_send_nullfunc(local, sdata, 1);
375177bf 1418
2a13052f
JO		 1419 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1420 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
1421 return;
1422
1423 conf->flags |= IEEE80211_CONF_PS;
1424 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965bedad
JB		 1425 }
1426}
1427
1428static void ieee80211_change_ps(struct ieee80211_local *local)
1429{
1430 struct ieee80211_conf *conf = &local->hw.conf;
1431
1432 if (local->ps_sdata) {
965bedad
JB		 1433 ieee80211_enable_ps(local, local->ps_sdata);
1434 } else if (conf->flags & IEEE80211_CONF_PS) {
1435 conf->flags &= ~IEEE80211_CONF_PS;
1436 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1437 del_timer_sync(&local->dynamic_ps_timer);
1438 cancel_work_sync(&local->dynamic_ps_enable_work);
1439 }
1440}
1441
808118cb
JY		 1442static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1443{
1444 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1445 struct sta_info *sta = NULL;
c2c98fde 1446 bool authorized = false;
808118cb
JY		 1447
1448 if (!mgd->powersave)
1449 return false;
1450
05cb9108
JB		 1451 if (mgd->broken_ap)
1452 return false;
1453
808118cb
JY		 1454 if (!mgd->associated)
1455 return false;
1456
392b9ffb 1457 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
808118cb
JY		 1458 return false;
1459
989c6505 1460 if (!mgd->have_beacon)
ce857888
AB		 1461 return false;
1462
808118cb
JY		 1463 rcu_read_lock();
1464 sta = sta_info_get(sdata, mgd->bssid);
1465 if (sta)
c2c98fde 1466 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
808118cb
JY		 1467 rcu_read_unlock();
1468
c2c98fde 1469 return authorized;
808118cb
JY		 1470}
1471
965bedad 1472/* need to hold RTNL or interface lock */
10f644a4 1473void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 1474{
1475 struct ieee80211_sub_if_data *sdata, *found = NULL;
1476 int count = 0;
195e294d 1477 int timeout;
965bedad
JB		 1478
1479 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
1480 local->ps_sdata = NULL;
1481 return;
1482 }
1483
1484 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 1485 if (!ieee80211_sdata_running(sdata))
965bedad 1486 continue;
8c7914de
RM		 1487 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1488 /* If an AP vif is found, then disable PS
1489 * by setting the count to zero thereby setting
1490 * ps_sdata to NULL.
1491 */
1492 count = 0;
1493 break;
1494 }
965bedad
JB		 1495 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1496 continue;
1497 found = sdata;
1498 count++;
1499 }
1500
808118cb 1501 if (count == 1 && ieee80211_powersave_allowed(found)) {
10f644a4
JB		 1502 s32 beaconint_us;
1503
1504 if (latency < 0)
ed77134b 1505 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
10f644a4
JB		 1506
1507 beaconint_us = ieee80211_tu_to_usec(
1508 found->vif.bss_conf.beacon_int);
1509
ff616381 1510 timeout = local->dynamic_ps_forced_timeout;
195e294d
JO		 1511 if (timeout < 0) {
1512 /*
ff616381
JO		 1513 * Go to full PSM if the user configures a very low
1514 * latency requirement.
0ab82b04
EP		 1515 * The 2000 second value is there for compatibility
1516 * until the PM_QOS_NETWORK_LATENCY is configured
1517 * with real values.
195e294d 1518 */
0ab82b04
EP		 1519 if (latency > (1900 * USEC_PER_MSEC) &&
1520 latency != (2000 * USEC_PER_SEC))
195e294d 1521 timeout = 0;
ff616381
JO		 1522 else
1523 timeout = 100;
195e294d 1524 }
09b85568 1525 local->hw.conf.dynamic_ps_timeout = timeout;
195e294d 1526
04fe2037 1527 if (beaconint_us > latency) {
10f644a4 1528 local->ps_sdata = NULL;
04fe2037 1529 } else {
04fe2037 1530 int maxslp = 1;
826262c3 1531 u8 dtimper = found->u.mgd.dtim_period;
56007a02
JB		 1532
1533 /* If the TIM IE is invalid, pretend the value is 1 */
1534 if (!dtimper)
1535 dtimper = 1;
1536 else if (dtimper > 1)
04fe2037
JB		 1537 maxslp = min_t(int, dtimper,
1538 latency / beaconint_us);
1539
9ccebe61 1540 local->hw.conf.max_sleep_period = maxslp;
56007a02 1541 local->hw.conf.ps_dtim_period = dtimper;
10f644a4 1542 local->ps_sdata = found;
04fe2037 1543 }
10f644a4 1544 } else {
965bedad 1545 local->ps_sdata = NULL;
10f644a4 1546 }
965bedad
JB		 1547
1548 ieee80211_change_ps(local);
1549}
1550
ab095877
EP		 1551void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1552{
1553 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1554
1555 if (sdata->vif.bss_conf.ps != ps_allowed) {
1556 sdata->vif.bss_conf.ps = ps_allowed;
1557 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1558 }
1559}
1560
965bedad
JB		 1561void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1562{
1563 struct ieee80211_local *local =
1564 container_of(work, struct ieee80211_local,
1565 dynamic_ps_disable_work);
1566
1567 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1568 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1569 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1570 }
1571
1572 ieee80211_wake_queues_by_reason(&local->hw,
445ea4e8 1573 IEEE80211_MAX_QUEUE_MAP,
cca07b00
LC		 1574 IEEE80211_QUEUE_STOP_REASON_PS,
1575 false);
965bedad
JB		 1576}
1577
1578void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1579{
1580 struct ieee80211_local *local =
1581 container_of(work, struct ieee80211_local,
1582 dynamic_ps_enable_work);
1583 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
5e34069c 1584 struct ieee80211_if_managed *ifmgd;
1ddc2867
RM		 1585 unsigned long flags;
1586 int q;
965bedad
JB		 1587
1588 /* can only happen when PS was just disabled anyway */
1589 if (!sdata)
1590 return;
1591
5e34069c
CL		 1592 ifmgd = &sdata->u.mgd;
1593
965bedad
JB		 1594 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1595 return;
1596
09b85568 1597 if (local->hw.conf.dynamic_ps_timeout > 0) {
77b7023a
AN		 1598 /* don't enter PS if TX frames are pending */
1599 if (drv_tx_frames_pending(local)) {
1ddc2867
RM		 1600 mod_timer(&local->dynamic_ps_timer, jiffies +
1601 msecs_to_jiffies(
1602 local->hw.conf.dynamic_ps_timeout));
1603 return;
1604 }
77b7023a
AN		 1605
1606 /*
1607 * transmission can be stopped by others which leads to
1608 * dynamic_ps_timer expiry. Postpone the ps timer if it
1609 * is not the actual idle state.
1610 */
1611 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1612 for (q = 0; q < local->hw.queues; q++) {
1613 if (local->queue_stop_reasons[q]) {
1614 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1615 flags);
1616 mod_timer(&local->dynamic_ps_timer, jiffies +
1617 msecs_to_jiffies(
1618 local->hw.conf.dynamic_ps_timeout));
1619 return;
1620 }
1621 }
1622 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1ddc2867 1623 }
1ddc2867 1624
375177bf 1625 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
9c38a8b4 1626 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
a1598383 1627 if (drv_tx_frames_pending(local)) {
e8306f98
VN		 1628 mod_timer(&local->dynamic_ps_timer, jiffies +
1629 msecs_to_jiffies(
1630 local->hw.conf.dynamic_ps_timeout));
a1598383 1631 } else {
e8306f98
VN		 1632 ieee80211_send_nullfunc(local, sdata, 1);
1633 /* Flush to get the tx status of nullfunc frame */
3b24f4c6 1634 ieee80211_flush_queues(local, sdata, false);
e8306f98 1635 }
f3e85b9e
VN		 1636 }
1637
2a13052f
JO		 1638 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1639 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
375177bf
VN		 1640 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1641 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1642 local->hw.conf.flags |= IEEE80211_CONF_PS;
1643 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1644 }
965bedad
JB		 1645}
1646
1647void ieee80211_dynamic_ps_timer(unsigned long data)
1648{
1649 struct ieee80211_local *local = (void *) data;
1650
42935eca 1651 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 1652}
1653
164eb02d
SW		 1654void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1655{
1656 struct delayed_work *delayed_work =
1657 container_of(work, struct delayed_work, work);
1658 struct ieee80211_sub_if_data *sdata =
1659 container_of(delayed_work, struct ieee80211_sub_if_data,
1660 dfs_cac_timer_work);
d2859df5 1661 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
164eb02d 1662
34a3740d
JB		 1663 mutex_lock(&sdata->local->mtx);
1664 if (sdata->wdev.cac_started) {
1665 ieee80211_vif_release_channel(sdata);
1666 cfg80211_cac_event(sdata->dev, &chandef,
1667 NL80211_RADAR_CAC_FINISHED,
1668 GFP_KERNEL);
1669 }
1670 mutex_unlock(&sdata->local->mtx);
164eb02d
SW		 1671}
1672
02219b3a
JB		 1673static bool
1674__ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1675{
1676 struct ieee80211_local *local = sdata->local;
1677 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
cc72f6e2 1678 bool ret = false;
02219b3a
JB		 1679 int ac;
1680
1681 if (local->hw.queues < IEEE80211_NUM_ACS)
1682 return false;
1683
1684 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1685 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
1686 int non_acm_ac;
1687 unsigned long now = jiffies;
1688
1689 if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
1690 tx_tspec->admitted_time &&
1691 time_after(now, tx_tspec->time_slice_start + HZ)) {
1692 tx_tspec->consumed_tx_time = 0;
1693 tx_tspec->time_slice_start = now;
1694
1695 if (tx_tspec->downgraded)
1696 tx_tspec->action =
1697 TX_TSPEC_ACTION_STOP_DOWNGRADE;
1698 }
1699
1700 switch (tx_tspec->action) {
1701 case TX_TSPEC_ACTION_STOP_DOWNGRADE:
1702 /* take the original parameters */
1703 if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac]))
1704 sdata_err(sdata,
1705 "failed to set TX queue parameters for queue %d\n",
1706 ac);
1707 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1708 tx_tspec->downgraded = false;
1709 ret = true;
1710 break;
1711 case TX_TSPEC_ACTION_DOWNGRADE:
1712 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
1713 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1714 ret = true;
1715 break;
1716 }
1717 /* downgrade next lower non-ACM AC */
1718 for (non_acm_ac = ac + 1;
1719 non_acm_ac < IEEE80211_NUM_ACS;
1720 non_acm_ac++)
1721 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
1722 break;
1723 /* The loop will result in using BK even if it requires
1724 * admission control, such configuration makes no sense
1725 * and we have to transmit somehow - the AC selection
1726 * does the same thing.
1727 */
1728 if (drv_conf_tx(local, sdata, ac,
1729 &sdata->tx_conf[non_acm_ac]))
1730 sdata_err(sdata,
1731 "failed to set TX queue parameters for queue %d\n",
1732 ac);
1733 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1734 ret = true;
1735 schedule_delayed_work(&ifmgd->tx_tspec_wk,
1736 tx_tspec->time_slice_start + HZ - now + 1);
1737 break;
1738 case TX_TSPEC_ACTION_NONE:
1739 /* nothing now */
1740 break;
1741 }
1742 }
1743
1744 return ret;
1745}
1746
1747void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1748{
1749 if (__ieee80211_sta_handle_tspec_ac_params(sdata))
1750 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1751}
1752
1753static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
1754{
1755 struct ieee80211_sub_if_data *sdata;
1756
1757 sdata = container_of(work, struct ieee80211_sub_if_data,
1758 u.mgd.tx_tspec_wk.work);
1759 ieee80211_sta_handle_tspec_ac_params(sdata);
1760}
1761
60f8b39c 1762/* MLME */
7d25745d 1763static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
4ced3f74 1764 struct ieee80211_sub_if_data *sdata,
4a3cb702 1765 const u8 *wmm_param, size_t wmm_param_len)
f0706e82 1766{
f0706e82 1767 struct ieee80211_tx_queue_params params;
4ced3f74 1768 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1769 size_t left;
1770 int count;
4a3cb702
JB		 1771 const u8 *pos;
1772 u8 uapsd_queues = 0;
f0706e82 1773
e1b3ec1a 1774 if (!local->ops->conf_tx)
7d25745d 1775 return false;
e1b3ec1a 1776
32c5057b 1777 if (local->hw.queues < IEEE80211_NUM_ACS)
7d25745d 1778 return false;
3434fbd3
JB		 1779
1780 if (!wmm_param)
7d25745d 1781 return false;
3434fbd3 1782
f0706e82 1783 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
7d25745d 1784 return false;
ab13315a
KV		 1785
1786 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
dc41e4d4 1787 uapsd_queues = ifmgd->uapsd_queues;
ab13315a 1788
f0706e82 1789 count = wmm_param[6] & 0x0f;
46900298 1790 if (count == ifmgd->wmm_last_param_set)
7d25745d 1791 return false;
46900298 1792 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 1793
1794 pos = wmm_param + 8;
1795 left = wmm_param_len - 8;
1796
1797 memset(&params, 0, sizeof(params));
1798
00e96dec 1799 sdata->wmm_acm = 0;
f0706e82
JB		 1800 for (; left >= 4; left -= 4, pos += 4) {
1801 int aci = (pos[0] >> 5) & 0x03;
1802 int acm = (pos[0] >> 4) & 0x01;
ab13315a 1803 bool uapsd = false;
f0706e82
JB		 1804 int queue;
1805
1806 switch (aci) {
0eeb59fe 1807 case 1: /* AC_BK */
e100bb64 1808 queue = 3;
988c0f72 1809 if (acm)
00e96dec 1810 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV		 1811 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1812 uapsd = true;
f0706e82 1813 break;
0eeb59fe 1814 case 2: /* AC_VI */
e100bb64 1815 queue = 1;
988c0f72 1816 if (acm)
00e96dec 1817 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV		 1818 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1819 uapsd = true;
f0706e82 1820 break;
0eeb59fe 1821 case 3: /* AC_VO */
e100bb64 1822 queue = 0;
988c0f72 1823 if (acm)
00e96dec 1824 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV		 1825 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1826 uapsd = true;
f0706e82 1827 break;
0eeb59fe 1828 case 0: /* AC_BE */
f0706e82 1829 default:
e100bb64 1830 queue = 2;
988c0f72 1831 if (acm)
00e96dec 1832 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV		 1833 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1834 uapsd = true;
f0706e82
JB		 1835 break;
1836 }
1837
1838 params.aifs = pos[0] & 0x0f;
1839 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1840 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 1841 params.txop = get_unaligned_le16(pos + 2);
908f8d07 1842 params.acm = acm;
ab13315a
KV		 1843 params.uapsd = uapsd;
1844
bdcbd8e0 1845 mlme_dbg(sdata,
02219b3a 1846 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
bdcbd8e0
JB		 1847 queue, aci, acm,
1848 params.aifs, params.cw_min, params.cw_max,
02219b3a
JB		 1849 params.txop, params.uapsd,
1850 ifmgd->tx_tspec[queue].downgraded);
f6f3def3 1851 sdata->tx_conf[queue] = params;
02219b3a
JB		 1852 if (!ifmgd->tx_tspec[queue].downgraded &&
1853 drv_conf_tx(local, sdata, queue, &params))
bdcbd8e0
JB		 1854 sdata_err(sdata,
1855 "failed to set TX queue parameters for queue %d\n",
1856 queue);
f0706e82 1857 }
e1b3ec1a
SG		 1858
1859 /* enable WMM or activate new settings */
4ced3f74 1860 sdata->vif.bss_conf.qos = true;
7d25745d 1861 return true;
f0706e82
JB		 1862}
1863
925e64c3
SG		 1864static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1865{
1866 lockdep_assert_held(&sdata->local->mtx);
1867
392b9ffb 1868 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
925e64c3
SG		 1869 ieee80211_run_deferred_scan(sdata->local);
1870}
1871
1872static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1873{
1874 mutex_lock(&sdata->local->mtx);
1875 __ieee80211_stop_poll(sdata);
1876 mutex_unlock(&sdata->local->mtx);
1877}
1878
7a5158ef
JB		 1879static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1880 u16 capab, bool erp_valid, u8 erp)
5628221c 1881{
bda3933a 1882 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 1883 u32 changed = 0;
7a5158ef
JB		 1884 bool use_protection;
1885 bool use_short_preamble;
1886 bool use_short_slot;
1887
1888 if (erp_valid) {
1889 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1890 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1891 } else {
1892 use_protection = false;
1893 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1894 }
1895
1896 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
55de908a 1897 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
43d35343 1898 use_short_slot = true;
5628221c 1899
471b3efd 1900 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 1901 bss_conf->use_cts_prot = use_protection;
1902 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 1903 }
7e9ed188 1904
d43c7b37 1905 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 1906 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 1907 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 1908 }
d9430a32 1909
7a5158ef 1910 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 1911 bss_conf->use_short_slot = use_short_slot;
1912 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 1913 }
1914
1915 return changed;
1916}
1917
f698d856 1918static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 1919 struct cfg80211_bss *cbss,
ae5eb026 1920 u32 bss_info_changed)
f0706e82 1921{
0c1ad2ca 1922 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 1923 struct ieee80211_local *local = sdata->local;
68542962 1924 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
d6f2da5b 1925
ae5eb026 1926 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 1927 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
50ae34a2 1928 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 1929
7ccc8bd7 1930 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
59c1ec2b 1931 beacon_loss_count * bss_conf->beacon_int));
7ccc8bd7 1932
0c1ad2ca
JB		 1933 sdata->u.mgd.associated = cbss;
1934 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 1935
17e4ec14
JM		 1936 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1937
488dd7b5 1938 if (sdata->vif.p2p) {
9caf0364 1939 const struct cfg80211_bss_ies *ies;
488dd7b5 1940
9caf0364
JB		 1941 rcu_read_lock();
1942 ies = rcu_dereference(cbss->ies);
1943 if (ies) {
9caf0364
JB		 1944 int ret;
1945
1946 ret = cfg80211_get_p2p_attr(
1947 ies->data, ies->len,
1948 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
67baf663
JD		 1949 (u8 *) &bss_conf->p2p_noa_attr,
1950 sizeof(bss_conf->p2p_noa_attr));
9caf0364 1951 if (ret >= 2) {
67baf663
JD		 1952 sdata->u.mgd.p2p_noa_index =
1953 bss_conf->p2p_noa_attr.index;
9caf0364 1954 bss_info_changed |= BSS_CHANGED_P2P_PS;
9caf0364 1955 }
488dd7b5 1956 }
9caf0364 1957 rcu_read_unlock();
488dd7b5
JB		 1958 }
1959
b291ba11 1960 /* just to be sure */
925e64c3 1961 ieee80211_stop_poll(sdata);
b291ba11 1962
9ac19a90 1963 ieee80211_led_assoc(local, 1);
9306102e 1964
989c6505 1965 if (sdata->u.mgd.have_beacon) {
826262c3
JB		 1966 /*
1967 * If the AP is buggy we may get here with no DTIM period
1968 * known, so assume it's 1 which is the only safe assumption
1969 * in that case, although if the TIM IE is broken powersave
1970 * probably just won't work at all.
1971 */
1972 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
817cee76 1973 bss_conf->beacon_rate = bss->beacon_rate;
989c6505 1974 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
826262c3 1975 } else {
817cee76 1976 bss_conf->beacon_rate = NULL;
e5b900d2 1977 bss_conf->dtim_period = 0;
826262c3 1978 }
e5b900d2 1979
68542962 1980 bss_conf->assoc = 1;
9cef8737 1981
a97c13c3 1982 /* Tell the driver to monitor connection quality (if supported) */
ea086359 1983 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
68542962 1984 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 1985 bss_info_changed |= BSS_CHANGED_CQM;
1986
68542962 1987 /* Enable ARP filtering */
0f19b41e 1988 if (bss_conf->arp_addr_cnt)
68542962 1989 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
68542962 1990
ae5eb026 1991 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 1992
056508dc
JB		 1993 mutex_lock(&local->iflist_mtx);
1994 ieee80211_recalc_ps(local, -1);
1995 mutex_unlock(&local->iflist_mtx);
e0cb686f 1996
04ecd257 1997 ieee80211_recalc_smps(sdata);
ab095877
EP		 1998 ieee80211_recalc_ps_vif(sdata);
1999
9ac19a90 2000 netif_carrier_on(sdata->dev);
f0706e82
JB		 2001}
2002
e69e95db 2003static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
37ad3888
JB		 2004 u16 stype, u16 reason, bool tx,
2005 u8 *frame_buf)
aa458d17 2006{
46900298 2007 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17 2008 struct ieee80211_local *local = sdata->local;
3cc5240b 2009 u32 changed = 0;
aa458d17 2010
8d61ffa5 2011 sdata_assert_lock(sdata);
77fdaa12 2012
37ad3888
JB		 2013 if (WARN_ON_ONCE(tx && !frame_buf))
2014 return;
2015
b291ba11
JB		 2016 if (WARN_ON(!ifmgd->associated))
2017 return;
2018
79543d8e
DS		 2019 ieee80211_stop_poll(sdata);
2020
77fdaa12 2021 ifmgd->associated = NULL;
aa458d17
TW		 2022 netif_carrier_off(sdata->dev);
2023
88bc40e8
EP		 2024 /*
2025 * if we want to get out of ps before disassoc (why?) we have
2026 * to do it before sending disassoc, as otherwise the null-packet
2027 * won't be valid.
2028 */
2029 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2030 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2031 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2032 }
2033 local->ps_sdata = NULL;
2034
ab095877
EP		 2035 /* disable per-vif ps */
2036 ieee80211_recalc_ps_vif(sdata);
2037
14f2ae83
EG		 2038 /* make sure ongoing transmission finishes */
2039 synchronize_net();
2040
3b24f4c6
EG		 2041 /*
2042 * drop any frame before deauth/disassoc, this can be data or
2043 * management frame. Since we are disconnecting, we should not
2044 * insist sending these frames which can take time and delay
2045 * the disconnection and possible the roaming.
2046 */
f823981e 2047 if (tx)
3b24f4c6 2048 ieee80211_flush_queues(local, sdata, true);
f823981e 2049
37ad3888
JB		 2050 /* deauthenticate/disassociate now */
2051 if (tx || frame_buf)
88a9e31c
EP		 2052 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
2053 reason, tx, frame_buf);
37ad3888 2054
3b24f4c6 2055 /* flush out frame - make sure the deauth was actually sent */
37ad3888 2056 if (tx)
3b24f4c6 2057 ieee80211_flush_queues(local, sdata, false);
37ad3888 2058
88a9e31c 2059 /* clear bssid only after building the needed mgmt frames */
c84a67a2 2060 eth_zero_addr(ifmgd->bssid);
88a9e31c 2061
37ad3888 2062 /* remove AP and TDLS peers */
d34ba216 2063 sta_info_flush(sdata);
37ad3888
JB		 2064
2065 /* finally reset all BSS / config parameters */
f5e5bf25
TW		 2066 changed |= ieee80211_reset_erp_info(sdata);
2067
f5e5bf25 2068 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 2069 changed |= BSS_CHANGED_ASSOC;
2070 sdata->vif.bss_conf.assoc = false;
f5e5bf25 2071
67baf663
JD		 2072 ifmgd->p2p_noa_index = -1;
2073 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
2074 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
488dd7b5 2075
dd5ecfea 2076 /* on the next assoc, re-program HT/VHT parameters */
ef96a842
BG		 2077 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
2078 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
dd5ecfea
JB		 2079 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
2080 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
413ad50a 2081
1ea6f9c0 2082 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
a8302de9 2083
520eb820
KV		 2084 del_timer_sync(&local->dynamic_ps_timer);
2085 cancel_work_sync(&local->dynamic_ps_enable_work);
2086
68542962 2087 /* Disable ARP filtering */
0f19b41e 2088 if (sdata->vif.bss_conf.arp_addr_cnt)
68542962 2089 changed |= BSS_CHANGED_ARP_FILTER;
68542962 2090
3abead59
JB		 2091 sdata->vif.bss_conf.qos = false;
2092 changed |= BSS_CHANGED_QOS;
2093
0aaffa9b
JB		 2094 /* The BSSID (not really interesting) and HT changed */
2095 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 2096 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 2097
3abead59
JB		 2098 /* disassociated - set to defaults now */
2099 ieee80211_set_wmm_default(sdata, false);
2100
b9dcf712
JB		 2101 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
2102 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
2103 del_timer_sync(&sdata->u.mgd.timer);
2104 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2d9957cc 2105
826262c3 2106 sdata->vif.bss_conf.dtim_period = 0;
817cee76
AB		 2107 sdata->vif.bss_conf.beacon_rate = NULL;
2108
989c6505 2109 ifmgd->have_beacon = false;
826262c3 2110
028e8da0 2111 ifmgd->flags = 0;
34a3740d 2112 mutex_lock(&local->mtx);
028e8da0 2113 ieee80211_vif_release_channel(sdata);
59af6928
MK		 2114
2115 sdata->vif.csa_active = false;
0c21e632 2116 ifmgd->csa_waiting_bcn = false;
f84eaa10 2117 ifmgd->csa_ignored_same_chan = false;
a46992b4
LC		 2118 if (sdata->csa_block_tx) {
2119 ieee80211_wake_vif_queues(local, sdata,
2120 IEEE80211_QUEUE_STOP_REASON_CSA);
2121 sdata->csa_block_tx = false;
2122 }
34a3740d 2123 mutex_unlock(&local->mtx);
2475b1cc 2124
02219b3a
JB		 2125 /* existing TX TSPEC sessions no longer exist */
2126 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
2127 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
2128
2475b1cc 2129 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
aa458d17 2130}
f0706e82 2131
3cf335d5
KV		 2132void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
2133 struct ieee80211_hdr *hdr)
2134{
2135 /*
2136 * We can postpone the mgd.timer whenever receiving unicast frames
2137 * from AP because we know that the connection is working both ways
2138 * at that time. But multicast frames (and hence also beacons) must
2139 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 2140 * data idle periods for sending the periodic probe request to the
2141 * AP we're connected to.
3cf335d5 2142 */
b291ba11
JB		 2143 if (is_multicast_ether_addr(hdr->addr1))
2144 return;
2145
be099e82 2146 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 2147}
f0706e82 2148
4e5ff376
FF		 2149static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
2150{
2151 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
133d40f9 2152 struct ieee80211_local *local = sdata->local;
4e5ff376 2153
133d40f9 2154 mutex_lock(&local->mtx);
392b9ffb
SG		 2155 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
2156 goto out;
4e5ff376 2157
925e64c3 2158 __ieee80211_stop_poll(sdata);
133d40f9
SG		 2159
2160 mutex_lock(&local->iflist_mtx);
2161 ieee80211_recalc_ps(local, -1);
2162 mutex_unlock(&local->iflist_mtx);
4e5ff376
FF		 2163
2164 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
133d40f9 2165 goto out;
4e5ff376
FF		 2166
2167 /*
2168 * We've received a probe response, but are not sure whether
2169 * we have or will be receiving any beacons or data, so let's
2170 * schedule the timers again, just in case.
2171 */
2172 ieee80211_sta_reset_beacon_monitor(sdata);
2173
2174 mod_timer(&ifmgd->conn_mon_timer,
2175 round_jiffies_up(jiffies +
2176 IEEE80211_CONNECTION_IDLE_TIME));
133d40f9 2177out:
133d40f9 2178 mutex_unlock(&local->mtx);
4e5ff376
FF		 2179}
2180
02219b3a
JB		 2181static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
2182 struct ieee80211_hdr *hdr,
2183 u16 tx_time)
2184{
2185 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2186 u16 tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
2187 int ac = ieee80211_ac_from_tid(tid);
2188 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
2189 unsigned long now = jiffies;
2190
2191 if (likely(!tx_tspec->admitted_time))
2192 return;
2193
2194 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2195 tx_tspec->consumed_tx_time = 0;
2196 tx_tspec->time_slice_start = now;
2197
2198 if (tx_tspec->downgraded) {
2199 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
2200 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2201 }
2202 }
2203
2204 if (tx_tspec->downgraded)
2205 return;
2206
2207 tx_tspec->consumed_tx_time += tx_time;
2208
2209 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
2210 tx_tspec->downgraded = true;
2211 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
2212 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2213 }
2214}
2215
4e5ff376 2216void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
02219b3a 2217 struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
4e5ff376 2218{
02219b3a
JB		 2219 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
2220
75706d0e 2221 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF		 2222 return;
2223
4e5ff376
FF		 2224 if (ieee80211_is_nullfunc(hdr->frame_control) &&
2225 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e 2226 if (ack)
cab1c7fd 2227 ieee80211_sta_reset_conn_monitor(sdata);
04ac3c0e
FF		 2228 else
2229 sdata->u.mgd.nullfunc_failed = true;
4e5ff376 2230 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
cab1c7fd 2231 return;
4e5ff376 2232 }
cab1c7fd
WD		 2233
2234 if (ack)
2235 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF		 2236}
2237
a43abf29
ML		 2238static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2239{
2240 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2241 const u8 *ssid;
f01a067d 2242 u8 *dst = ifmgd->associated->bssid;
180205bd 2243 u8 unicast_limit = max(1, max_probe_tries - 3);
f01a067d
LR		 2244
2245 /*
2246 * Try sending broadcast probe requests for the last three
2247 * probe requests after the first ones failed since some
2248 * buggy APs only support broadcast probe requests.
2249 */
2250 if (ifmgd->probe_send_count >= unicast_limit)
2251 dst = NULL;
a43abf29 2252
4e5ff376
FF		 2253 /*
2254 * When the hardware reports an accurate Tx ACK status, it's
2255 * better to send a nullfunc frame instead of a probe request,
2256 * as it will kick us off the AP quickly if we aren't associated
2257 * anymore. The timeout will be reset if the frame is ACKed by
2258 * the AP.
2259 */
992e68bf
SD		 2260 ifmgd->probe_send_count++;
2261
04ac3c0e
FF		 2262 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2263 ifmgd->nullfunc_failed = false;
4e5ff376 2264 ieee80211_send_nullfunc(sdata->local, sdata, 0);
04ac3c0e 2265 } else {
88c868c4
SG		 2266 int ssid_len;
2267
9caf0364 2268 rcu_read_lock();
4e5ff376 2269 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
88c868c4
SG		 2270 if (WARN_ON_ONCE(ssid == NULL))
2271 ssid_len = 0;
2272 else
2273 ssid_len = ssid[1];
2274
a73f8e21 2275 ieee80211_send_probe_req(sdata, sdata->vif.addr, dst,
a344d677 2276 ssid + 2, ssid_len, NULL,
1672c0e3 2277 0, (u32) -1, true, 0,
55de908a 2278 ifmgd->associated->channel, false);
9caf0364 2279 rcu_read_unlock();
4e5ff376 2280 }
a43abf29 2281
180205bd 2282 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
8d61ffa5 2283 run_again(sdata, ifmgd->probe_timeout);
a43abf29
ML		 2284}
2285
b291ba11
JB		 2286static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2287 bool beacon)
04de8381 2288{
04de8381 2289 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 2290 bool already = false;
34bfc411 2291
9607e6b6 2292 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 2293 return;
2294
8d61ffa5 2295 sdata_lock(sdata);
77fdaa12
JB		 2296
2297 if (!ifmgd->associated)
2298 goto out;
2299
133d40f9
SG		 2300 mutex_lock(&sdata->local->mtx);
2301
2302 if (sdata->local->tmp_channel || sdata->local->scanning) {
2303 mutex_unlock(&sdata->local->mtx);
2304 goto out;
2305 }
2306
a13fbe54 2307 if (beacon) {
bdcbd8e0 2308 mlme_dbg_ratelimited(sdata,
59c1ec2b
BG		 2309 "detected beacon loss from AP (missed %d beacons) - probing\n",
2310 beacon_loss_count);
bdcbd8e0 2311
98f03342 2312 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
a13fbe54 2313 }
04de8381 2314
b291ba11
JB		 2315 /*
2316 * The driver/our work has already reported this event or the
2317 * connection monitoring has kicked in and we have already sent
2318 * a probe request. Or maybe the AP died and the driver keeps
2319 * reporting until we disassociate...
2320 *
2321 * In either case we have to ignore the current call to this
2322 * function (except for setting the correct probe reason bit)
2323 * because otherwise we would reset the timer every time and
2324 * never check whether we received a probe response!
2325 */
392b9ffb 2326 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
b291ba11
JB		 2327 already = true;
2328
12b5f34d
EP		 2329 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2330
133d40f9
SG		 2331 mutex_unlock(&sdata->local->mtx);
2332
b291ba11
JB		 2333 if (already)
2334 goto out;
2335
4e751843
JB		 2336 mutex_lock(&sdata->local->iflist_mtx);
2337 ieee80211_recalc_ps(sdata->local, -1);
2338 mutex_unlock(&sdata->local->iflist_mtx);
2339
a43abf29
ML		 2340 ifmgd->probe_send_count = 0;
2341 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12 2342 out:
8d61ffa5 2343 sdata_unlock(sdata);
04de8381
KV		 2344}
2345
a619a4c0
JO		 2346struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2347 struct ieee80211_vif *vif)
2348{
2349 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2350 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d9b3b28b 2351 struct cfg80211_bss *cbss;
a619a4c0
JO		 2352 struct sk_buff *skb;
2353 const u8 *ssid;
88c868c4 2354 int ssid_len;
a619a4c0
JO		 2355
2356 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2357 return NULL;
2358
8d61ffa5 2359 sdata_assert_lock(sdata);
a619a4c0 2360
d9b3b28b
EP		 2361 if (ifmgd->associated)
2362 cbss = ifmgd->associated;
2363 else if (ifmgd->auth_data)
2364 cbss = ifmgd->auth_data->bss;
2365 else if (ifmgd->assoc_data)
2366 cbss = ifmgd->assoc_data->bss;
2367 else
a619a4c0
JO		 2368 return NULL;
2369
9caf0364 2370 rcu_read_lock();
d9b3b28b 2371 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
88c868c4
SG		 2372 if (WARN_ON_ONCE(ssid == NULL))
2373 ssid_len = 0;
2374 else
2375 ssid_len = ssid[1];
2376
a344d677 2377 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
55de908a 2378 (u32) -1, cbss->channel,
6b77863b 2379 ssid + 2, ssid_len,
85a237fe 2380 NULL, 0, true);
9caf0364 2381 rcu_read_unlock();
a619a4c0
JO		 2382
2383 return skb;
2384}
2385EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2386
a90faa9d
EG		 2387static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata,
2388 const u8 *buf, size_t len, bool tx,
2389 u16 reason)
2390{
2391 struct ieee80211_event event = {
2392 .type = MLME_EVENT,
2393 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT,
2394 .u.mlme.reason = reason,
2395 };
2396
2397 if (tx)
2398 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len);
2399 else
2400 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len);
2401
2402 drv_event_callback(sdata->local, sdata, &event);
2403}
2404
eef9e54c 2405static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
1e4dcd01 2406{
59af6928 2407 struct ieee80211_local *local = sdata->local;
1e4dcd01 2408 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 2409 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
1e4dcd01 2410
8d61ffa5 2411 sdata_lock(sdata);
1e4dcd01 2412 if (!ifmgd->associated) {
8d61ffa5 2413 sdata_unlock(sdata);
1e4dcd01
JO		 2414 return;
2415 }
2416
37ad3888
JB		 2417 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2418 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
eef9e54c 2419 true, frame_buf);
59af6928 2420 mutex_lock(&local->mtx);
7578d575 2421 sdata->vif.csa_active = false;
0c21e632 2422 ifmgd->csa_waiting_bcn = false;
a46992b4
LC		 2423 if (sdata->csa_block_tx) {
2424 ieee80211_wake_vif_queues(local, sdata,
2425 IEEE80211_QUEUE_STOP_REASON_CSA);
2426 sdata->csa_block_tx = false;
2427 }
59af6928 2428 mutex_unlock(&local->mtx);
7da7cc1d 2429
a90faa9d
EG		 2430 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
2431 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2432
8d61ffa5 2433 sdata_unlock(sdata);
1e4dcd01
JO		 2434}
2435
cc74c0c7 2436static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 2437{
2438 struct ieee80211_sub_if_data *sdata =
2439 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 2440 u.mgd.beacon_connection_loss_work);
a85e1d55
PS		 2441 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2442 struct sta_info *sta;
2443
2444 if (ifmgd->associated) {
30fa9047 2445 rcu_read_lock();
a85e1d55
PS		 2446 sta = sta_info_get(sdata, ifmgd->bssid);
2447 if (sta)
2448 sta->beacon_loss_count++;
30fa9047 2449 rcu_read_unlock();
a85e1d55 2450 }
b291ba11 2451
682bd38b 2452 if (ifmgd->connection_loss) {
882a7c69
JB		 2453 sdata_info(sdata, "Connection to AP %pM lost\n",
2454 ifmgd->bssid);
eef9e54c 2455 __ieee80211_disconnect(sdata);
882a7c69 2456 } else {
1e4dcd01 2457 ieee80211_mgd_probe_ap(sdata, true);
882a7c69
JB		 2458 }
2459}
2460
2461static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2462{
2463 struct ieee80211_sub_if_data *sdata =
2464 container_of(work, struct ieee80211_sub_if_data,
2465 u.mgd.csa_connection_drop_work);
2466
eef9e54c 2467 __ieee80211_disconnect(sdata);
b291ba11
JB		 2468}
2469
04de8381
KV		 2470void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2471{
2472 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 2473 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 2474
b5878a2d
JB		 2475 trace_api_beacon_loss(sdata);
2476
682bd38b 2477 sdata->u.mgd.connection_loss = false;
1e4dcd01 2478 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 2479}
2480EXPORT_SYMBOL(ieee80211_beacon_loss);
2481
1e4dcd01
JO		 2482void ieee80211_connection_loss(struct ieee80211_vif *vif)
2483{
2484 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2485 struct ieee80211_hw *hw = &sdata->local->hw;
2486
b5878a2d
JB		 2487 trace_api_connection_loss(sdata);
2488
682bd38b 2489 sdata->u.mgd.connection_loss = true;
1e4dcd01
JO		 2490 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2491}
2492EXPORT_SYMBOL(ieee80211_connection_loss);
2493
2494
66e67e41
JB		 2495static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2496 bool assoc)
2497{
2498 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2499
8d61ffa5 2500 sdata_assert_lock(sdata);
66e67e41 2501
66e67e41 2502 if (!assoc) {
c1e140bf
EG		 2503 /*
2504 * we are not authenticated yet, the only timer that could be
2505 * running is the timeout for the authentication response which
2506 * which is not relevant anymore.
2507 */
2508 del_timer_sync(&sdata->u.mgd.timer);
66e67e41
JB		 2509 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2510
c84a67a2 2511 eth_zero_addr(sdata->u.mgd.bssid);
66e67e41 2512 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
028e8da0 2513 sdata->u.mgd.flags = 0;
34a3740d 2514 mutex_lock(&sdata->local->mtx);
55de908a 2515 ieee80211_vif_release_channel(sdata);
34a3740d 2516 mutex_unlock(&sdata->local->mtx);
66e67e41
JB		 2517 }
2518
5b112d3d 2519 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
66e67e41
JB		 2520 kfree(auth_data);
2521 sdata->u.mgd.auth_data = NULL;
2522}
2523
c9c99f89
JB		 2524static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2525 bool assoc)
2526{
2527 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2528
2529 sdata_assert_lock(sdata);
2530
2531 if (!assoc) {
2532 /*
2533 * we are not associated yet, the only timer that could be
2534 * running is the timeout for the association response which
2535 * which is not relevant anymore.
2536 */
2537 del_timer_sync(&sdata->u.mgd.timer);
2538 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2539
2540 eth_zero_addr(sdata->u.mgd.bssid);
2541 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2542 sdata->u.mgd.flags = 0;
2543 mutex_lock(&sdata->local->mtx);
2544 ieee80211_vif_release_channel(sdata);
2545 mutex_unlock(&sdata->local->mtx);
2546 }
2547
2548 kfree(assoc_data);
2549 sdata->u.mgd.assoc_data = NULL;
2550}
2551
66e67e41
JB		 2552static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2553 struct ieee80211_mgmt *mgmt, size_t len)
2554{
1672c0e3 2555 struct ieee80211_local *local = sdata->local;
66e67e41
JB		 2556 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2557 u8 *pos;
2558 struct ieee802_11_elems elems;
1672c0e3 2559 u32 tx_flags = 0;
66e67e41
JB		 2560
2561 pos = mgmt->u.auth.variable;
b2e506bf 2562 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
66e67e41
JB		 2563 if (!elems.challenge)
2564 return;
2565 auth_data->expected_transaction = 4;
a1845fc7 2566 drv_mgd_prepare_tx(sdata->local, sdata);
1672c0e3
JB		 2567 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2568 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2569 IEEE80211_TX_INTFL_MLME_CONN_TX;
700e8ea6 2570 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
66e67e41
JB		 2571 elems.challenge - 2, elems.challenge_len + 2,
2572 auth_data->bss->bssid, auth_data->bss->bssid,
2573 auth_data->key, auth_data->key_len,
1672c0e3 2574 auth_data->key_idx, tx_flags);
66e67e41
JB		 2575}
2576
8d61ffa5
JB		 2577static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2578 struct ieee80211_mgmt *mgmt, size_t len)
66e67e41
JB		 2579{
2580 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2581 u8 bssid[ETH_ALEN];
2582 u16 auth_alg, auth_transaction, status_code;
2583 struct sta_info *sta;
a9409093
EG		 2584 struct ieee80211_event event = {
2585 .type = MLME_EVENT,
2586 .u.mlme.data = AUTH_EVENT,
2587 };
66e67e41 2588
8d61ffa5 2589 sdata_assert_lock(sdata);
66e67e41
JB		 2590
2591 if (len < 24 + 6)
8d61ffa5 2592 return;
66e67e41
JB		 2593
2594 if (!ifmgd->auth_data || ifmgd->auth_data->done)
8d61ffa5 2595 return;
66e67e41
JB		 2596
2597 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2598
b203ca39 2599 if (!ether_addr_equal(bssid, mgmt->bssid))
8d61ffa5 2600 return;
66e67e41
JB		 2601
2602 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2603 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2604 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2605
2606 if (auth_alg != ifmgd->auth_data->algorithm ||
0f4126e8
JM		 2607 auth_transaction != ifmgd->auth_data->expected_transaction) {
2608 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2609 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2610 auth_transaction,
2611 ifmgd->auth_data->expected_transaction);
8d61ffa5 2612 return;
0f4126e8 2613 }
66e67e41
JB		 2614
2615 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2616 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2617 mgmt->sa, status_code);
dac211ec 2618 ieee80211_destroy_auth_data(sdata, false);
6ff57cf8 2619 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
a9409093
EG		 2620 event.u.mlme.status = MLME_DENIED;
2621 event.u.mlme.reason = status_code;
2622 drv_event_callback(sdata->local, sdata, &event);
8d61ffa5 2623 return;
66e67e41
JB		 2624 }
2625
2626 switch (ifmgd->auth_data->algorithm) {
2627 case WLAN_AUTH_OPEN:
2628 case WLAN_AUTH_LEAP:
2629 case WLAN_AUTH_FT:
6b8ece3a 2630 case WLAN_AUTH_SAE:
66e67e41
JB		 2631 break;
2632 case WLAN_AUTH_SHARED_KEY:
2633 if (ifmgd->auth_data->expected_transaction != 4) {
2634 ieee80211_auth_challenge(sdata, mgmt, len);
2635 /* need another frame */
8d61ffa5 2636 return;
66e67e41
JB		 2637 }
2638 break;
2639 default:
2640 WARN_ONCE(1, "invalid auth alg %d",
2641 ifmgd->auth_data->algorithm);
8d61ffa5 2642 return;
66e67e41
JB		 2643 }
2644
a9409093
EG		 2645 event.u.mlme.status = MLME_SUCCESS;
2646 drv_event_callback(sdata->local, sdata, &event);
bdcbd8e0 2647 sdata_info(sdata, "authenticated\n");
66e67e41
JB		 2648 ifmgd->auth_data->done = true;
2649 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
89afe614 2650 ifmgd->auth_data->timeout_started = true;
8d61ffa5 2651 run_again(sdata, ifmgd->auth_data->timeout);
66e67e41 2652
6b8ece3a
JM		 2653 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2654 ifmgd->auth_data->expected_transaction != 2) {
2655 /*
2656 * Report auth frame to user space for processing since another
2657 * round of Authentication frames is still needed.
2658 */
6ff57cf8 2659 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
8d61ffa5 2660 return;
6b8ece3a
JM		 2661 }
2662
66e67e41
JB		 2663 /* move station state to auth */
2664 mutex_lock(&sdata->local->sta_mtx);
2665 sta = sta_info_get(sdata, bssid);
2666 if (!sta) {
2667 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2668 goto out_err;
2669 }
2670 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
bdcbd8e0 2671 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
66e67e41
JB		 2672 goto out_err;
2673 }
2674 mutex_unlock(&sdata->local->sta_mtx);
2675
6ff57cf8 2676 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
8d61ffa5 2677 return;
66e67e41
JB		 2678 out_err:
2679 mutex_unlock(&sdata->local->sta_mtx);
2680 /* ignore frame -- wait for timeout */
66e67e41
JB		 2681}
2682
dfa1ad29
CO		 2683#define case_WLAN(type) \
2684 case WLAN_REASON_##type: return #type
2685
2686static const char *ieee80211_get_reason_code_string(u16 reason_code)
2687{
2688 switch (reason_code) {
2689 case_WLAN(UNSPECIFIED);
2690 case_WLAN(PREV_AUTH_NOT_VALID);
2691 case_WLAN(DEAUTH_LEAVING);
2692 case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2693 case_WLAN(DISASSOC_AP_BUSY);
2694 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2695 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2696 case_WLAN(DISASSOC_STA_HAS_LEFT);
2697 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2698 case_WLAN(DISASSOC_BAD_POWER);
2699 case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2700 case_WLAN(INVALID_IE);
2701 case_WLAN(MIC_FAILURE);
2702 case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2703 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2704 case_WLAN(IE_DIFFERENT);
2705 case_WLAN(INVALID_GROUP_CIPHER);
2706 case_WLAN(INVALID_PAIRWISE_CIPHER);
2707 case_WLAN(INVALID_AKMP);
2708 case_WLAN(UNSUPP_RSN_VERSION);
2709 case_WLAN(INVALID_RSN_IE_CAP);
2710 case_WLAN(IEEE8021X_FAILED);
2711 case_WLAN(CIPHER_SUITE_REJECTED);
2712 case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2713 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2714 case_WLAN(DISASSOC_LOW_ACK);
2715 case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2716 case_WLAN(QSTA_LEAVE_QBSS);
2717 case_WLAN(QSTA_NOT_USE);
2718 case_WLAN(QSTA_REQUIRE_SETUP);
2719 case_WLAN(QSTA_TIMEOUT);
2720 case_WLAN(QSTA_CIPHER_NOT_SUPP);
2721 case_WLAN(MESH_PEER_CANCELED);
2722 case_WLAN(MESH_MAX_PEERS);
2723 case_WLAN(MESH_CONFIG);
2724 case_WLAN(MESH_CLOSE);
2725 case_WLAN(MESH_MAX_RETRIES);
2726 case_WLAN(MESH_CONFIRM_TIMEOUT);
2727 case_WLAN(MESH_INVALID_GTK);
2728 case_WLAN(MESH_INCONSISTENT_PARAM);
2729 case_WLAN(MESH_INVALID_SECURITY);
2730 case_WLAN(MESH_PATH_ERROR);
2731 case_WLAN(MESH_PATH_NOFORWARD);
2732 case_WLAN(MESH_PATH_DEST_UNREACHABLE);
2733 case_WLAN(MAC_EXISTS_IN_MBSS);
2734 case_WLAN(MESH_CHAN_REGULATORY);
2735 case_WLAN(MESH_CHAN);
2736 default: return "<unknown>";
2737 }
2738}
66e67e41 2739
8d61ffa5
JB		 2740static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2741 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2742{
46900298 2743 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
c9c99f89 2744 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
f0706e82 2745
8d61ffa5 2746 sdata_assert_lock(sdata);
66e67e41 2747
f4ea83dd 2748 if (len < 24 + 2)
8d61ffa5 2749 return;
f0706e82 2750
c9c99f89
JB		 2751 if (ifmgd->associated &&
2752 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) {
2753 const u8 *bssid = ifmgd->associated->bssid;
77fdaa12 2754
c9c99f89
JB		 2755 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
2756 bssid, reason_code,
2757 ieee80211_get_reason_code_string(reason_code));
f0706e82 2758
c9c99f89 2759 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
f0706e82 2760
c9c99f89
JB		 2761 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false,
2762 reason_code);
2763 return;
2764 }
77fdaa12 2765
c9c99f89
JB		 2766 if (ifmgd->assoc_data &&
2767 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
2768 const u8 *bssid = ifmgd->assoc_data->bss->bssid;
37ad3888 2769
c9c99f89
JB		 2770 sdata_info(sdata,
2771 "deauthenticated from %pM while associating (Reason: %u=%s)\n",
2772 bssid, reason_code,
2773 ieee80211_get_reason_code_string(reason_code));
2774
2775 ieee80211_destroy_assoc_data(sdata, false);
2776
2777 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2778 return;
2779 }
f0706e82
JB		 2780}
2781
2782
8d61ffa5
JB		 2783static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2784 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2785{
46900298 2786 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 2787 u16 reason_code;
2788
8d61ffa5 2789 sdata_assert_lock(sdata);
77fdaa12 2790
66e67e41 2791 if (len < 24 + 2)
8d61ffa5 2792 return;
77fdaa12 2793
66e67e41 2794 if (!ifmgd->associated ||
b203ca39 2795 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
8d61ffa5 2796 return;
f0706e82
JB		 2797
2798 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2799
bdcbd8e0
JB		 2800 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2801 mgmt->sa, reason_code);
f0706e82 2802
37ad3888
JB		 2803 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2804
a90faa9d 2805 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code);
f0706e82
JB		 2806}
2807
c74d084f
CL		 2808static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2809 u8 *supp_rates, unsigned int supp_rates_len,
2810 u32 *rates, u32 *basic_rates,
2811 bool *have_higher_than_11mbit,
2103dec1
SW		 2812 int *min_rate, int *min_rate_index,
2813 int shift, u32 rate_flags)
c74d084f
CL		 2814{
2815 int i, j;
2816
2817 for (i = 0; i < supp_rates_len; i++) {
2103dec1 2818 int rate = supp_rates[i] & 0x7f;
c74d084f
CL		 2819 bool is_basic = !!(supp_rates[i] & 0x80);
2820
2103dec1 2821 if ((rate * 5 * (1 << shift)) > 110)
c74d084f
CL		 2822 *have_higher_than_11mbit = true;
2823
2824 /*
2825 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2826 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2827 *
2828 * Note: Even through the membership selector and the basic
2829 * rate flag share the same bit, they are not exactly
2830 * the same.
2831 */
2832 if (!!(supp_rates[i] & 0x80) &&
2833 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2834 continue;
2835
2836 for (j = 0; j < sband->n_bitrates; j++) {
2103dec1
SW		 2837 struct ieee80211_rate *br;
2838 int brate;
2839
2840 br = &sband->bitrates[j];
2841 if ((rate_flags & br->flags) != rate_flags)
2842 continue;
2843
2844 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2845 if (brate == rate) {
c74d084f
CL		 2846 *rates |= BIT(j);
2847 if (is_basic)
2848 *basic_rates |= BIT(j);
2103dec1
SW		 2849 if ((rate * 5) < *min_rate) {
2850 *min_rate = rate * 5;
c74d084f
CL		 2851 *min_rate_index = j;
2852 }
2853 break;
2854 }
2855 }
2856 }
2857}
f0706e82 2858
66e67e41
JB		 2859static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2860 struct cfg80211_bss *cbss,
af6b6374 2861 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2862{
46900298 2863 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 2864 struct ieee80211_local *local = sdata->local;
8318d78a 2865 struct ieee80211_supported_band *sband;
f0706e82 2866 struct sta_info *sta;
af6b6374 2867 u8 *pos;
af6b6374 2868 u16 capab_info, aid;
f0706e82 2869 struct ieee802_11_elems elems;
bda3933a 2870 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
35d865af
JB		 2871 const struct cfg80211_bss_ies *bss_ies = NULL;
2872 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
ae5eb026 2873 u32 changed = 0;
c74d084f 2874 int err;
35d865af 2875 bool ret;
f0706e82 2876
af6b6374 2877 /* AssocResp and ReassocResp have identical structure */
f0706e82 2878
f0706e82 2879 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 2880 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 2881
1dd84aa2 2882 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
bdcbd8e0
JB		 2883 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2884 aid);
1dd84aa2
JB		 2885 aid &= ~(BIT(15) | BIT(14));
2886
05cb9108
JB		 2887 ifmgd->broken_ap = false;
2888
2889 if (aid == 0 || aid > IEEE80211_MAX_AID) {
bdcbd8e0
JB		 2890 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2891 aid);
05cb9108
JB		 2892 aid = 0;
2893 ifmgd->broken_ap = true;
2894 }
2895
af6b6374 2896 pos = mgmt->u.assoc_resp.variable;
b2e506bf 2897 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
af6b6374 2898
f0706e82 2899 if (!elems.supp_rates) {
bdcbd8e0 2900 sdata_info(sdata, "no SuppRates element in AssocResp\n");
af6b6374 2901 return false;
f0706e82
JB		 2902 }
2903
46900298 2904 ifmgd->aid = aid;
9041c1fa
AN		 2905 ifmgd->tdls_chan_switch_prohibited =
2906 elems.ext_capab && elems.ext_capab_len >= 5 &&
2907 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
f0706e82 2908
35d865af
JB		 2909 /*
2910 * Some APs are erroneously not including some information in their
2911 * (re)association response frames. Try to recover by using the data
2912 * from the beacon or probe response. This seems to afflict mobile
2913 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2914 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2915 */
2916 if ((assoc_data->wmm && !elems.wmm_param) ||
2917 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2918 (!elems.ht_cap_elem || !elems.ht_operation)) ||
2919 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2920 (!elems.vht_cap_elem || !elems.vht_operation))) {
2921 const struct cfg80211_bss_ies *ies;
2922 struct ieee802_11_elems bss_elems;
2923
2924 rcu_read_lock();
2925 ies = rcu_dereference(cbss->ies);
2926 if (ies)
2927 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2928 GFP_ATOMIC);
2929 rcu_read_unlock();
2930 if (!bss_ies)
2931 return false;
2932
2933 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2934 false, &bss_elems);
2935 if (assoc_data->wmm &&
2936 !elems.wmm_param && bss_elems.wmm_param) {
2937 elems.wmm_param = bss_elems.wmm_param;
2938 sdata_info(sdata,
2939 "AP bug: WMM param missing from AssocResp\n");
2940 }
2941
2942 /*
2943 * Also check if we requested HT/VHT, otherwise the AP doesn't
2944 * have to include the IEs in the (re)association response.
2945 */
2946 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2947 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2948 elems.ht_cap_elem = bss_elems.ht_cap_elem;
2949 sdata_info(sdata,
2950 "AP bug: HT capability missing from AssocResp\n");
2951 }
2952 if (!elems.ht_operation && bss_elems.ht_operation &&
2953 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2954 elems.ht_operation = bss_elems.ht_operation;
2955 sdata_info(sdata,
2956 "AP bug: HT operation missing from AssocResp\n");
2957 }
2958 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2959 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2960 elems.vht_cap_elem = bss_elems.vht_cap_elem;
2961 sdata_info(sdata,
2962 "AP bug: VHT capa missing from AssocResp\n");
2963 }
2964 if (!elems.vht_operation && bss_elems.vht_operation &&
2965 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2966 elems.vht_operation = bss_elems.vht_operation;
2967 sdata_info(sdata,
2968 "AP bug: VHT operation missing from AssocResp\n");
2969 }
2970 }
2971
30eb1dc2
JB		 2972 /*
2973 * We previously checked these in the beacon/probe response, so
2974 * they should be present here. This is just a safety net.
2975 */
2976 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2977 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2978 sdata_info(sdata,
35d865af
JB		 2979 "HT AP is missing WMM params or HT capability/operation\n");
2980 ret = false;
2981 goto out;
30eb1dc2
JB		 2982 }
2983
2984 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2985 (!elems.vht_cap_elem || !elems.vht_operation)) {
2986 sdata_info(sdata,
35d865af
JB		 2987 "VHT AP is missing VHT capability/operation\n");
2988 ret = false;
2989 goto out;
30eb1dc2
JB		 2990 }
2991
2a33bee2
GE		 2992 mutex_lock(&sdata->local->sta_mtx);
2993 /*
2994 * station info was already allocated and inserted before
2995 * the association and should be available to us
2996 */
7852e361 2997 sta = sta_info_get(sdata, cbss->bssid);
2a33bee2
GE		 2998 if (WARN_ON(!sta)) {
2999 mutex_unlock(&sdata->local->sta_mtx);
35d865af
JB		 3000 ret = false;
3001 goto out;
77fdaa12 3002 }
05e5e883 3003
55de908a 3004 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
f709fc69 3005
30eb1dc2 3006 /* Set up internal HT/VHT capabilities */
a8243b72 3007 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
ef96a842 3008 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
e1a0c6b3 3009 elems.ht_cap_elem, sta);
64f68e5d 3010
818255ea
MP		 3011 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
3012 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
4a34215e 3013 elems.vht_cap_elem, sta);
818255ea 3014
30eb1dc2
JB		 3015 /*
3016 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
3017 * in their association response, so ignore that data for our own
3018 * configuration. If it changed since the last beacon, we'll get the
3019 * next beacon and update then.
3020 */
1128958d 3021
bee7f586
JB		 3022 /*
3023 * If an operating mode notification IE is present, override the
3024 * NSS calculation (that would be done in rate_control_rate_init())
3025 * and use the # of streams from that element.
3026 */
3027 if (elems.opmode_notif &&
3028 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
3029 u8 nss;
3030
3031 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
3032 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
3033 nss += 1;
3034 sta->sta.rx_nss = nss;
3035 }
3036
4b7679a5 3037 rate_control_rate_init(sta);
f0706e82 3038
64a8cef4 3039 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) {
c2c98fde 3040 set_sta_flag(sta, WLAN_STA_MFP);
64a8cef4
SJ		 3041 sta->sta.mfp = true;
3042 } else {
3043 sta->sta.mfp = false;
3044 }
5394af4d 3045
527871d7 3046 sta->sta.wme = elems.wmm_param && local->hw.queues >= IEEE80211_NUM_ACS;
ddf4ac53 3047
3e4d40fa 3048 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
c8987876
JB		 3049 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
3050 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
3051 if (err) {
bdcbd8e0
JB		 3052 sdata_info(sdata,
3053 "failed to move station %pM to desired state\n",
3054 sta->sta.addr);
c8987876
JB		 3055 WARN_ON(__sta_info_destroy(sta));
3056 mutex_unlock(&sdata->local->sta_mtx);
35d865af
JB		 3057 ret = false;
3058 goto out;
c8987876
JB		 3059 }
3060
7852e361 3061 mutex_unlock(&sdata->local->sta_mtx);
ddf4ac53 3062
f2176d72
JO		 3063 /*
3064 * Always handle WMM once after association regardless
3065 * of the first value the AP uses. Setting -1 here has
3066 * that effect because the AP values is an unsigned
3067 * 4-bit value.
3068 */
3069 ifmgd->wmm_last_param_set = -1;
3070
095d81ce 3071 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && elems.wmm_param)
4ced3f74 3072 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 3073 elems.wmm_param_len);
aa837e1d 3074 else
3abead59
JB		 3075 ieee80211_set_wmm_default(sdata, false);
3076 changed |= BSS_CHANGED_QOS;
f0706e82 3077
60f8b39c
JB		 3078 /* set AID and assoc capability,
3079 * ieee80211_set_associated() will tell the driver */
3080 bss_conf->aid = aid;
3081 bss_conf->assoc_capability = capab_info;
0c1ad2ca 3082 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 3083
d524215f
FF		 3084 /*
3085 * If we're using 4-addr mode, let the AP know that we're
3086 * doing so, so that it can create the STA VLAN on its side
3087 */
3088 if (ifmgd->use_4addr)
3089 ieee80211_send_4addr_nullfunc(local, sdata);
3090
15b7b062 3091 /*
b291ba11
JB		 3092 * Start timer to probe the connection to the AP now.
3093 * Also start the timer that will detect beacon loss.
15b7b062 3094 */
b291ba11 3095 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 3096 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 3097
35d865af
JB		 3098 ret = true;
3099 out:
3100 kfree(bss_ies);
3101 return ret;
f0706e82
JB		 3102}
3103
8d61ffa5
JB		 3104static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
3105 struct ieee80211_mgmt *mgmt,
3106 size_t len)
66e67e41
JB		 3107{
3108 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3109 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3110 u16 capab_info, status_code, aid;
3111 struct ieee802_11_elems elems;
b0b6aa2c 3112 int ac, uapsd_queues = -1;
66e67e41
JB		 3113 u8 *pos;
3114 bool reassoc;
8d61ffa5 3115 struct cfg80211_bss *bss;
d0d1a12f
EG		 3116 struct ieee80211_event event = {
3117 .type = MLME_EVENT,
3118 .u.mlme.data = ASSOC_EVENT,
3119 };
66e67e41 3120
8d61ffa5 3121 sdata_assert_lock(sdata);
66e67e41
JB		 3122
3123 if (!assoc_data)
8d61ffa5 3124 return;
b203ca39 3125 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
8d61ffa5 3126 return;
66e67e41
JB		 3127
3128 /*
3129 * AssocResp and ReassocResp have identical structure, so process both
3130 * of them in this function.
3131 */
3132
3133 if (len < 24 + 6)
8d61ffa5 3134 return;
66e67e41
JB		 3135
3136 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
3137 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3138 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
3139 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3140
bdcbd8e0
JB		 3141 sdata_info(sdata,
3142 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3143 reassoc ? "Rea" : "A", mgmt->sa,
3144 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
66e67e41
JB		 3145
3146 pos = mgmt->u.assoc_resp.variable;
b2e506bf 3147 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
66e67e41
JB		 3148
3149 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
79ba1d89
JB		 3150 elems.timeout_int &&
3151 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
66e67e41 3152 u32 tu, ms;
79ba1d89 3153 tu = le32_to_cpu(elems.timeout_int->value);
66e67e41 3154 ms = tu * 1024 / 1000;
bdcbd8e0
JB		 3155 sdata_info(sdata,
3156 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3157 mgmt->sa, tu, ms);
66e67e41 3158 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
89afe614 3159 assoc_data->timeout_started = true;
66e67e41 3160 if (ms > IEEE80211_ASSOC_TIMEOUT)
8d61ffa5
JB		 3161 run_again(sdata, assoc_data->timeout);
3162 return;
66e67e41
JB		 3163 }
3164
8d61ffa5 3165 bss = assoc_data->bss;
66e67e41
JB		 3166
3167 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 3168 sdata_info(sdata, "%pM denied association (code=%d)\n",
3169 mgmt->sa, status_code);
66e67e41 3170 ieee80211_destroy_assoc_data(sdata, false);
d0d1a12f
EG		 3171 event.u.mlme.status = MLME_DENIED;
3172 event.u.mlme.reason = status_code;
3173 drv_event_callback(sdata->local, sdata, &event);
66e67e41 3174 } else {
8d61ffa5 3175 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
66e67e41 3176 /* oops -- internal error -- send timeout for now */
10a9109f 3177 ieee80211_destroy_assoc_data(sdata, false);
959867fa 3178 cfg80211_assoc_timeout(sdata->dev, bss);
8d61ffa5 3179 return;
66e67e41 3180 }
d0d1a12f
EG		 3181 event.u.mlme.status = MLME_SUCCESS;
3182 drv_event_callback(sdata->local, sdata, &event);
635d999f 3183 sdata_info(sdata, "associated\n");
79ebfb85
JB		 3184
3185 /*
3186 * destroy assoc_data afterwards, as otherwise an idle
3187 * recalc after assoc_data is NULL but before associated
3188 * is set can cause the interface to go idle
3189 */
3190 ieee80211_destroy_assoc_data(sdata, true);
b0b6aa2c
EP		 3191
3192 /* get uapsd queues configuration */
3193 uapsd_queues = 0;
3194 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
3195 if (sdata->tx_conf[ac].uapsd)
3196 uapsd_queues |= BIT(ac);
66e67e41
JB		 3197 }
3198
b0b6aa2c 3199 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues);
66e67e41 3200}
8e3c1b77 3201
98c8fccf 3202static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
8e3c1b77 3203 struct ieee80211_mgmt *mgmt, size_t len,
98c8fccf 3204 struct ieee80211_rx_status *rx_status,
d45c4172 3205 struct ieee802_11_elems *elems)
98c8fccf
JB		 3206{
3207 struct ieee80211_local *local = sdata->local;
c2b13452 3208 struct ieee80211_bss *bss;
98c8fccf 3209 struct ieee80211_channel *channel;
56007a02 3210
8d61ffa5 3211 sdata_assert_lock(sdata);
b4f286a1 3212
3afc2167
EG		 3213 channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
3214 if (!channel)
98c8fccf
JB		 3215 return;
3216
98c8fccf 3217 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
d45c4172 3218 channel);
817cee76 3219 if (bss) {
817cee76 3220 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
d2722f8b 3221 ieee80211_rx_bss_put(local, bss);
817cee76 3222 }
f0706e82
JB		 3223}
3224
3225
f698d856 3226static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 3227 struct sk_buff *skb)
f0706e82 3228{
af6b6374 3229 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 3230 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 3231 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
3232 size_t baselen, len = skb->len;
ae6a44e3
EK		 3233 struct ieee802_11_elems elems;
3234
15b7b062
KV		 3235 ifmgd = &sdata->u.mgd;
3236
8d61ffa5 3237 sdata_assert_lock(sdata);
77fdaa12 3238
b203ca39 3239 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
8e7cdbb6
TW		 3240 return; /* ignore ProbeResp to foreign address */
3241
ae6a44e3
EK		 3242 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
3243 if (baselen > len)
3244 return;
3245
3246 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
b2e506bf 3247 false, &elems);
ae6a44e3 3248
d45c4172 3249 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
9859b81e 3250
77fdaa12 3251 if (ifmgd->associated &&
b203ca39 3252 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
4e5ff376 3253 ieee80211_reset_ap_probe(sdata);
66e67e41
JB		 3254
3255 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
b203ca39 3256 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
66e67e41 3257 /* got probe response, continue with auth */
bdcbd8e0 3258 sdata_info(sdata, "direct probe responded\n");
66e67e41
JB		 3259 ifmgd->auth_data->tries = 0;
3260 ifmgd->auth_data->timeout = jiffies;
89afe614 3261 ifmgd->auth_data->timeout_started = true;
8d61ffa5 3262 run_again(sdata, ifmgd->auth_data->timeout);
66e67e41 3263 }
f0706e82
JB		 3264}
3265
d91f36db
JB		 3266/*
3267 * This is the canonical list of information elements we care about,
3268 * the filter code also gives us all changes to the Microsoft OUI
c8d65917
SG		 3269 * (00:50:F2) vendor IE which is used for WMM which we need to track,
3270 * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3271 * changes to requested client power.
d91f36db
JB		 3272 *
3273 * We implement beacon filtering in software since that means we can
3274 * avoid processing the frame here and in cfg80211, and userspace
3275 * will not be able to tell whether the hardware supports it or not.
3276 *
3277 * XXX: This list needs to be dynamic -- userspace needs to be able to
3278 * add items it requires. It also needs to be able to tell us to
3279 * look out for other vendor IEs.
3280 */
3281static const u64 care_about_ies =
1d4df3a5
JB		 3282 (1ULL << WLAN_EID_COUNTRY) |
3283 (1ULL << WLAN_EID_ERP_INFO) |
3284 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
3285 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
3286 (1ULL << WLAN_EID_HT_CAPABILITY) |
70a3fd6c
JB		 3287 (1ULL << WLAN_EID_HT_OPERATION) |
3288 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN);
d91f36db 3289
8d61ffa5
JB		 3290static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
3291 struct ieee80211_mgmt *mgmt, size_t len,
3292 struct ieee80211_rx_status *rx_status)
f0706e82 3293{
d91f36db 3294 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 3295 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 3296 size_t baselen;
3297 struct ieee802_11_elems elems;
f698d856 3298 struct ieee80211_local *local = sdata->local;
55de908a
JB		 3299 struct ieee80211_chanctx_conf *chanctx_conf;
3300 struct ieee80211_channel *chan;
bee7f586 3301 struct sta_info *sta;
471b3efd 3302 u32 changed = 0;
f87ad637 3303 bool erp_valid;
7a5158ef 3304 u8 erp_value = 0;
d91f36db 3305 u32 ncrc;
77fdaa12 3306 u8 *bssid;
8d61ffa5 3307 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
77fdaa12 3308
8d61ffa5 3309 sdata_assert_lock(sdata);
f0706e82 3310
ae6a44e3
EK		 3311 /* Process beacon from the current BSS */
3312 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3313 if (baselen > len)
8d61ffa5 3314 return;
ae6a44e3 3315
55de908a
JB		 3316 rcu_read_lock();
3317 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3318 if (!chanctx_conf) {
3319 rcu_read_unlock();
8d61ffa5 3320 return;
55de908a
JB		 3321 }
3322
4bf88530 3323 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
55de908a 3324 rcu_read_unlock();
8d61ffa5 3325 return;
55de908a 3326 }
4bf88530 3327 chan = chanctx_conf->def.chan;
55de908a 3328 rcu_read_unlock();
f0706e82 3329
c65dd147 3330 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
b203ca39 3331 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
66e67e41 3332 ieee802_11_parse_elems(mgmt->u.beacon.variable,
b2e506bf 3333 len - baselen, false, &elems);
77fdaa12 3334
d45c4172 3335 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
482a9c74
AB		 3336 if (elems.tim && !elems.parse_error) {
3337 const struct ieee80211_tim_ie *tim_ie = elems.tim;
3338 ifmgd->dtim_period = tim_ie->dtim_period;
3339 }
989c6505 3340 ifmgd->have_beacon = true;
c65dd147 3341 ifmgd->assoc_data->need_beacon = false;
ef429dad
JB		 3342 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3343 sdata->vif.bss_conf.sync_tsf =
3344 le64_to_cpu(mgmt->u.beacon.timestamp);
3345 sdata->vif.bss_conf.sync_device_ts =
3346 rx_status->device_timestamp;
3347 if (elems.tim)
3348 sdata->vif.bss_conf.sync_dtim_count =
3349 elems.tim->dtim_count;
3350 else
3351 sdata->vif.bss_conf.sync_dtim_count = 0;
3352 }
66e67e41
JB		 3353 /* continue assoc process */
3354 ifmgd->assoc_data->timeout = jiffies;
89afe614 3355 ifmgd->assoc_data->timeout_started = true;
8d61ffa5
JB		 3356 run_again(sdata, ifmgd->assoc_data->timeout);
3357 return;
66e67e41 3358 }
77fdaa12 3359
66e67e41 3360 if (!ifmgd->associated ||
b203ca39 3361 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
8d61ffa5 3362 return;
66e67e41 3363 bssid = ifmgd->associated->bssid;
f0706e82 3364
17e4ec14
JM		 3365 /* Track average RSSI from the Beacon frames of the current AP */
3366 ifmgd->last_beacon_signal = rx_status->signal;
3367 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3368 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3ba06c6f 3369 ifmgd->ave_beacon_signal = rx_status->signal * 16;
17e4ec14 3370 ifmgd->last_cqm_event_signal = 0;
391a200a 3371 ifmgd->count_beacon_signal = 1;
615f7b9b 3372 ifmgd->last_ave_beacon_signal = 0;
17e4ec14
JM		 3373 } else {
3374 ifmgd->ave_beacon_signal =
3375 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
3376 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
3377 ifmgd->ave_beacon_signal) / 16;
391a200a 3378 ifmgd->count_beacon_signal++;
17e4ec14 3379 }
615f7b9b
MV		 3380
3381 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3382 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3383 int sig = ifmgd->ave_beacon_signal;
3384 int last_sig = ifmgd->last_ave_beacon_signal;
a8182929
EG		 3385 struct ieee80211_event event = {
3386 .type = RSSI_EVENT,
3387 };
615f7b9b
MV		 3388
3389 /*
3390 * if signal crosses either of the boundaries, invoke callback
3391 * with appropriate parameters
3392 */
3393 if (sig > ifmgd->rssi_max_thold &&
3394 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3395 ifmgd->last_ave_beacon_signal = sig;
a8182929
EG		 3396 event.u.rssi.data = RSSI_EVENT_HIGH;
3397 drv_event_callback(local, sdata, &event);
615f7b9b
MV		 3398 } else if (sig < ifmgd->rssi_min_thold &&
3399 (last_sig >= ifmgd->rssi_max_thold ||
3400 last_sig == 0)) {
3401 ifmgd->last_ave_beacon_signal = sig;
a8182929
EG		 3402 event.u.rssi.data = RSSI_EVENT_LOW;
3403 drv_event_callback(local, sdata, &event);
615f7b9b
MV		 3404 }
3405 }
3406
17e4ec14 3407 if (bss_conf->cqm_rssi_thold &&
391a200a 3408 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
ea086359 3409 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
17e4ec14
JM		 3410 int sig = ifmgd->ave_beacon_signal / 16;
3411 int last_event = ifmgd->last_cqm_event_signal;
3412 int thold = bss_conf->cqm_rssi_thold;
3413 int hyst = bss_conf->cqm_rssi_hyst;
3414 if (sig < thold &&
3415 (last_event == 0 || sig < last_event - hyst)) {
3416 ifmgd->last_cqm_event_signal = sig;
3417 ieee80211_cqm_rssi_notify(
3418 &sdata->vif,
3419 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3420 GFP_KERNEL);
3421 } else if (sig > thold &&
3422 (last_event == 0 || sig > last_event + hyst)) {
3423 ifmgd->last_cqm_event_signal = sig;
3424 ieee80211_cqm_rssi_notify(
3425 &sdata->vif,
3426 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3427 GFP_KERNEL);
3428 }
3429 }
3430
392b9ffb 3431 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
bdcbd8e0 3432 mlme_dbg_ratelimited(sdata,
112c31f0 3433 "cancelling AP probe due to a received beacon\n");
392b9ffb 3434 ieee80211_reset_ap_probe(sdata);
92778180
JM		 3435 }
3436
b291ba11
JB		 3437 /*
3438 * Push the beacon loss detection into the future since
3439 * we are processing a beacon from the AP just now.
3440 */
d3a910a8 3441 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 3442
d91f36db
JB		 3443 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3444 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
b2e506bf 3445 len - baselen, false, &elems,
d91f36db
JB		 3446 care_about_ies, ncrc);
3447
25c9c875 3448 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
f87ad637
RR		 3449 bool directed_tim = ieee80211_check_tim(elems.tim,
3450 elems.tim_len,
3451 ifmgd->aid);
1fb3606b 3452 if (directed_tim) {
572e0012 3453 if (local->hw.conf.dynamic_ps_timeout > 0) {
70b12f26
RW		 3454 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3455 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3456 ieee80211_hw_config(local,
3457 IEEE80211_CONF_CHANGE_PS);
3458 }
572e0012 3459 ieee80211_send_nullfunc(local, sdata, 0);
6f0756a3 3460 } else if (!local->pspolling && sdata->u.mgd.powersave) {
572e0012
KV		 3461 local->pspolling = true;
3462
3463 /*
3464 * Here is assumed that the driver will be
3465 * able to send ps-poll frame and receive a
3466 * response even though power save mode is
3467 * enabled, but some drivers might require
3468 * to disable power save here. This needs
3469 * to be investigated.
3470 */
3471 ieee80211_send_pspoll(local, sdata);
3472 }
a97b77b9
VN		 3473 }
3474 }
7a5158ef 3475
488dd7b5 3476 if (sdata->vif.p2p) {
67baf663 3477 struct ieee80211_p2p_noa_attr noa = {};
488dd7b5
JB		 3478 int ret;
3479
3480 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3481 len - baselen,
3482 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
934457ee 3483 (u8 *) &noa, sizeof(noa));
67baf663
JD		 3484 if (ret >= 2) {
3485 if (sdata->u.mgd.p2p_noa_index != noa.index) {
3486 /* valid noa_attr and index changed */
3487 sdata->u.mgd.p2p_noa_index = noa.index;
3488 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3489 changed |= BSS_CHANGED_P2P_PS;
3490 /*
3491 * make sure we update all information, the CRC
3492 * mechanism doesn't look at P2P attributes.
3493 */
3494 ifmgd->beacon_crc_valid = false;
3495 }
3496 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3497 /* noa_attr not found and we had valid noa_attr before */
3498 sdata->u.mgd.p2p_noa_index = -1;
3499 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
488dd7b5 3500 changed |= BSS_CHANGED_P2P_PS;
488dd7b5
JB		 3501 ifmgd->beacon_crc_valid = false;
3502 }
3503 }
3504
0c21e632
LC		 3505 if (ifmgd->csa_waiting_bcn)
3506 ieee80211_chswitch_post_beacon(sdata);
3507
2ecc3905
AB		 3508 /*
3509 * Update beacon timing and dtim count on every beacon appearance. This
3510 * will allow the driver to use the most updated values. Do it before
3511 * comparing this one with last received beacon.
3512 * IMPORTANT: These parameters would possibly be out of sync by the time
3513 * the driver will use them. The synchronized view is currently
3514 * guaranteed only in certain callbacks.
3515 */
3516 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3517 sdata->vif.bss_conf.sync_tsf =
3518 le64_to_cpu(mgmt->u.beacon.timestamp);
3519 sdata->vif.bss_conf.sync_device_ts =
3520 rx_status->device_timestamp;
3521 if (elems.tim)
3522 sdata->vif.bss_conf.sync_dtim_count =
3523 elems.tim->dtim_count;
3524 else
3525 sdata->vif.bss_conf.sync_dtim_count = 0;
3526 }
3527
d8ec4433 3528 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
8d61ffa5 3529 return;
30196673 3530 ifmgd->beacon_crc = ncrc;
d8ec4433 3531 ifmgd->beacon_crc_valid = true;
30196673 3532
d45c4172 3533 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
7d25745d 3534
d70b7616 3535 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
2ba45384 3536 rx_status->device_timestamp,
d70b7616
JB		 3537 &elems, true);
3538
095d81ce
JB		 3539 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3540 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
7d25745d
JB		 3541 elems.wmm_param_len))
3542 changed |= BSS_CHANGED_QOS;
3543
c65dd147
EG		 3544 /*
3545 * If we haven't had a beacon before, tell the driver about the
ef429dad 3546 * DTIM period (and beacon timing if desired) now.
c65dd147 3547 */
989c6505 3548 if (!ifmgd->have_beacon) {
c65dd147
EG		 3549 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3550 if (elems.tim)
3551 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3552 else
3553 bss_conf->dtim_period = 1;
ef429dad 3554
989c6505
AB		 3555 changed |= BSS_CHANGED_BEACON_INFO;
3556 ifmgd->have_beacon = true;
482a9c74
AB		 3557
3558 mutex_lock(&local->iflist_mtx);
3559 ieee80211_recalc_ps(local, -1);
3560 mutex_unlock(&local->iflist_mtx);
3561
ce857888 3562 ieee80211_recalc_ps_vif(sdata);
c65dd147
EG		 3563 }
3564
1946bed9 3565 if (elems.erp_info) {
7a5158ef
JB		 3566 erp_valid = true;
3567 erp_value = elems.erp_info[0];
3568 } else {
3569 erp_valid = false;
50c4afb9 3570 }
7a5158ef
JB		 3571 changed |= ieee80211_handle_bss_capability(sdata,
3572 le16_to_cpu(mgmt->u.beacon.capab_info),
3573 erp_valid, erp_value);
f0706e82 3574
1128958d 3575 mutex_lock(&local->sta_mtx);
bee7f586
JB		 3576 sta = sta_info_get(sdata, bssid);
3577
53b954ee
EP		 3578 if (ieee80211_config_bw(sdata, sta,
3579 elems.ht_cap_elem, elems.ht_operation,
30eb1dc2
JB		 3580 elems.vht_operation, bssid, &changed)) {
3581 mutex_unlock(&local->sta_mtx);
3582 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3583 WLAN_REASON_DEAUTH_LEAVING,
3584 true, deauth_buf);
a90faa9d
EG		 3585 ieee80211_report_disconnect(sdata, deauth_buf,
3586 sizeof(deauth_buf), true,
3587 WLAN_REASON_DEAUTH_LEAVING);
8d61ffa5 3588 return;
30eb1dc2 3589 }
bee7f586
JB		 3590
3591 if (sta && elems.opmode_notif)
3592 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3593 rx_status->band, true);
1128958d 3594 mutex_unlock(&local->sta_mtx);
d3c990fb 3595
24a4e400
SG		 3596 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
3597 elems.country_elem,
3598 elems.country_elem_len,
c8d65917
SG		 3599 elems.pwr_constr_elem,
3600 elems.cisco_dtpc_elem);
3f2355cb 3601
471b3efd 3602 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 3603}
3604
1fa57d01
JB		 3605void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3606 struct sk_buff *skb)
f0706e82
JB		 3607{
3608 struct ieee80211_rx_status *rx_status;
f0706e82
JB		 3609 struct ieee80211_mgmt *mgmt;
3610 u16 fc;
1b3a2e49
JB		 3611 struct ieee802_11_elems elems;
3612 int ies_len;
f0706e82 3613
f0706e82
JB		 3614 rx_status = (struct ieee80211_rx_status *) skb->cb;
3615 mgmt = (struct ieee80211_mgmt *) skb->data;
3616 fc = le16_to_cpu(mgmt->frame_control);
3617
8d61ffa5 3618 sdata_lock(sdata);
77fdaa12 3619
66e67e41
JB		 3620 switch (fc & IEEE80211_FCTL_STYPE) {
3621 case IEEE80211_STYPE_BEACON:
8d61ffa5 3622 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
66e67e41
JB		 3623 break;
3624 case IEEE80211_STYPE_PROBE_RESP:
3625 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3626 break;
3627 case IEEE80211_STYPE_AUTH:
8d61ffa5 3628 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
66e67e41
JB		 3629 break;
3630 case IEEE80211_STYPE_DEAUTH:
8d61ffa5 3631 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
66e67e41
JB		 3632 break;
3633 case IEEE80211_STYPE_DISASSOC:
8d61ffa5 3634 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
66e67e41
JB		 3635 break;
3636 case IEEE80211_STYPE_ASSOC_RESP:
3637 case IEEE80211_STYPE_REASSOC_RESP:
8d61ffa5 3638 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
66e67e41
JB		 3639 break;
3640 case IEEE80211_STYPE_ACTION:
37799e52 3641 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
1b3a2e49
JB		 3642 ies_len = skb->len -
3643 offsetof(struct ieee80211_mgmt,
3644 u.action.u.chan_switch.variable);
37799e52
JB		 3645
3646 if (ies_len < 0)
3647 break;
3648
3649 ieee802_11_parse_elems(
3650 mgmt->u.action.u.chan_switch.variable,
b2e506bf 3651 ies_len, true, &elems);
37799e52
JB		 3652
3653 if (elems.parse_error)
3654 break;
3655
1b3a2e49 3656 ieee80211_sta_process_chanswitch(sdata,
2ba45384
LC		 3657 rx_status->mactime,
3658 rx_status->device_timestamp,
3659 &elems, false);
1b3a2e49
JB		 3660 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3661 ies_len = skb->len -
3662 offsetof(struct ieee80211_mgmt,
3663 u.action.u.ext_chan_switch.variable);
3664
3665 if (ies_len < 0)
3666 break;
3667
3668 ieee802_11_parse_elems(
3669 mgmt->u.action.u.ext_chan_switch.variable,
b2e506bf 3670 ies_len, true, &elems);
1b3a2e49
JB		 3671
3672 if (elems.parse_error)
3673 break;
3674
3675 /* for the handling code pretend this was also an IE */
3676 elems.ext_chansw_ie =
3677 &mgmt->u.action.u.ext_chan_switch.data;
3678
66e67e41 3679 ieee80211_sta_process_chanswitch(sdata,
2ba45384
LC		 3680 rx_status->mactime,
3681 rx_status->device_timestamp,
3682 &elems, false);
77fdaa12 3683 }
37799e52 3684 break;
77fdaa12 3685 }
8d61ffa5 3686 sdata_unlock(sdata);
f0706e82
JB		 3687}
3688
9c6bd790 3689static void ieee80211_sta_timer(unsigned long data)
f0706e82 3690{
60f8b39c
JB		 3691 struct ieee80211_sub_if_data *sdata =
3692 (struct ieee80211_sub_if_data *) data;
5bb644a0 3693
9b7d72c1 3694 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
f0706e82
JB		 3695}
3696
04ac3c0e 3697static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
6b684db1 3698 u8 *bssid, u8 reason, bool tx)
04ac3c0e 3699{
6ae16775 3700 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
04ac3c0e 3701
37ad3888 3702 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
6b684db1 3703 tx, frame_buf);
37ad3888 3704
a90faa9d
EG		 3705 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
3706 reason);
04ac3c0e
FF		 3707}
3708
66e67e41
JB		 3709static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
3710{
3711 struct ieee80211_local *local = sdata->local;
3712 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3713 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
1672c0e3 3714 u32 tx_flags = 0;
66e67e41 3715
8d61ffa5 3716 sdata_assert_lock(sdata);
66e67e41
JB		 3717
3718 if (WARN_ON_ONCE(!auth_data))
3719 return -EINVAL;
3720
66e67e41
JB		 3721 auth_data->tries++;
3722
3723 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
bdcbd8e0
JB		 3724 sdata_info(sdata, "authentication with %pM timed out\n",
3725 auth_data->bss->bssid);
66e67e41
JB		 3726
3727 /*
3728 * Most likely AP is not in the range so remove the
3729 * bss struct for that AP.
3730 */
3731 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3732
3733 return -ETIMEDOUT;
3734 }
3735
a1845fc7
JB		 3736 drv_mgd_prepare_tx(local, sdata);
3737
66e67e41 3738 if (auth_data->bss->proberesp_ies) {
6b8ece3a
JM		 3739 u16 trans = 1;
3740 u16 status = 0;
3741
bdcbd8e0
JB		 3742 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3743 auth_data->bss->bssid, auth_data->tries,
3744 IEEE80211_AUTH_MAX_TRIES);
66e67e41
JB		 3745
3746 auth_data->expected_transaction = 2;
6b8ece3a
JM		 3747
3748 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3749 trans = auth_data->sae_trans;
3750 status = auth_data->sae_status;
3751 auth_data->expected_transaction = trans;
3752 }
3753
6211dd12
SG		 3754 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3755 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3756 IEEE80211_TX_INTFL_MLME_CONN_TX;
3757
6b8ece3a
JM		 3758 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3759 auth_data->data, auth_data->data_len,
66e67e41 3760 auth_data->bss->bssid,
1672c0e3
JB		 3761 auth_data->bss->bssid, NULL, 0, 0,
3762 tx_flags);
66e67e41
JB		 3763 } else {
3764 const u8 *ssidie;
3765
bdcbd8e0
JB		 3766 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
3767 auth_data->bss->bssid, auth_data->tries,
3768 IEEE80211_AUTH_MAX_TRIES);
66e67e41 3769
9caf0364 3770 rcu_read_lock();
66e67e41 3771 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
9caf0364
JB		 3772 if (!ssidie) {
3773 rcu_read_unlock();
66e67e41 3774 return -EINVAL;
9caf0364 3775 }
66e67e41
JB		 3776 /*
3777 * Direct probe is sent to broadcast address as some APs
3778 * will not answer to direct packet in unassociated state.
3779 */
a344d677
JB		 3780 ieee80211_send_probe_req(sdata, sdata->vif.addr, NULL,
3781 ssidie + 2, ssidie[1],
6211dd12 3782 NULL, 0, (u32) -1, true, 0,
55de908a 3783 auth_data->bss->channel, false);
9caf0364 3784 rcu_read_unlock();
66e67e41
JB		 3785 }
3786
6211dd12 3787 if (tx_flags == 0) {
1672c0e3 3788 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
cb236d2d 3789 auth_data->timeout_started = true;
8d61ffa5 3790 run_again(sdata, auth_data->timeout);
89afe614 3791 } else {
cb236d2d
JB		 3792 auth_data->timeout =
3793 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3794 auth_data->timeout_started = true;
3795 run_again(sdata, auth_data->timeout);
1672c0e3 3796 }
66e67e41
JB		 3797
3798 return 0;
3799}
3800
3801static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3802{
3803 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3804 struct ieee80211_local *local = sdata->local;
3805
8d61ffa5 3806 sdata_assert_lock(sdata);
66e67e41 3807
66e67e41
JB		 3808 assoc_data->tries++;
3809 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
bdcbd8e0
JB		 3810 sdata_info(sdata, "association with %pM timed out\n",
3811 assoc_data->bss->bssid);
66e67e41
JB		 3812
3813 /*
3814 * Most likely AP is not in the range so remove the
3815 * bss struct for that AP.
3816 */
3817 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3818
3819 return -ETIMEDOUT;
3820 }
3821
bdcbd8e0
JB		 3822 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3823 assoc_data->bss->bssid, assoc_data->tries,
3824 IEEE80211_ASSOC_MAX_TRIES);
66e67e41
JB		 3825 ieee80211_send_assoc(sdata);
3826
1672c0e3
JB		 3827 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
3828 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
89afe614 3829 assoc_data->timeout_started = true;
8d61ffa5 3830 run_again(sdata, assoc_data->timeout);
89afe614 3831 } else {
cb236d2d
JB		 3832 assoc_data->timeout =
3833 round_jiffies_up(jiffies +
3834 IEEE80211_ASSOC_TIMEOUT_LONG);
3835 assoc_data->timeout_started = true;
3836 run_again(sdata, assoc_data->timeout);
1672c0e3 3837 }
66e67e41
JB		 3838
3839 return 0;
3840}
3841
1672c0e3
JB		 3842void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3843 __le16 fc, bool acked)
3844{
3845 struct ieee80211_local *local = sdata->local;
3846
3847 sdata->u.mgd.status_fc = fc;
3848 sdata->u.mgd.status_acked = acked;
3849 sdata->u.mgd.status_received = true;
3850
3851 ieee80211_queue_work(&local->hw, &sdata->work);
3852}
3853
1fa57d01 3854void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 3855{
9c6bd790 3856 struct ieee80211_local *local = sdata->local;
1fa57d01 3857 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 3858
8d61ffa5 3859 sdata_lock(sdata);
77fdaa12 3860
1672c0e3
JB		 3861 if (ifmgd->status_received) {
3862 __le16 fc = ifmgd->status_fc;
3863 bool status_acked = ifmgd->status_acked;
3864
3865 ifmgd->status_received = false;
3866 if (ifmgd->auth_data &&
3867 (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) {
3868 if (status_acked) {
3869 ifmgd->auth_data->timeout =
3870 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
8d61ffa5 3871 run_again(sdata, ifmgd->auth_data->timeout);
1672c0e3
JB		 3872 } else {
3873 ifmgd->auth_data->timeout = jiffies - 1;
3874 }
89afe614 3875 ifmgd->auth_data->timeout_started = true;
1672c0e3
JB		 3876 } else if (ifmgd->assoc_data &&
3877 (ieee80211_is_assoc_req(fc) ||
3878 ieee80211_is_reassoc_req(fc))) {
3879 if (status_acked) {
3880 ifmgd->assoc_data->timeout =
3881 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
8d61ffa5 3882 run_again(sdata, ifmgd->assoc_data->timeout);
1672c0e3
JB		 3883 } else {
3884 ifmgd->assoc_data->timeout = jiffies - 1;
3885 }
89afe614 3886 ifmgd->assoc_data->timeout_started = true;
1672c0e3
JB		 3887 }
3888 }
3889
89afe614 3890 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
66e67e41
JB		 3891 time_after(jiffies, ifmgd->auth_data->timeout)) {
3892 if (ifmgd->auth_data->done) {
3893 /*
3894 * ok ... we waited for assoc but userspace didn't,
3895 * so let's just kill the auth data
3896 */
3897 ieee80211_destroy_auth_data(sdata, false);
3898 } else if (ieee80211_probe_auth(sdata)) {
3899 u8 bssid[ETH_ALEN];
a9409093
EG		 3900 struct ieee80211_event event = {
3901 .type = MLME_EVENT,
3902 .u.mlme.data = AUTH_EVENT,
3903 .u.mlme.status = MLME_TIMEOUT,
3904 };
66e67e41
JB		 3905
3906 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3907
3908 ieee80211_destroy_auth_data(sdata, false);
3909
6ff57cf8 3910 cfg80211_auth_timeout(sdata->dev, bssid);
a9409093 3911 drv_event_callback(sdata->local, sdata, &event);
66e67e41 3912 }
89afe614 3913 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
8d61ffa5 3914 run_again(sdata, ifmgd->auth_data->timeout);
66e67e41 3915
89afe614 3916 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
66e67e41 3917 time_after(jiffies, ifmgd->assoc_data->timeout)) {
989c6505 3918 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
66e67e41 3919 ieee80211_do_assoc(sdata)) {
959867fa 3920 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
d0d1a12f
EG		 3921 struct ieee80211_event event = {
3922 .type = MLME_EVENT,
3923 .u.mlme.data = ASSOC_EVENT,
3924 .u.mlme.status = MLME_TIMEOUT,
3925 };
66e67e41
JB		 3926
3927 ieee80211_destroy_assoc_data(sdata, false);
959867fa 3928 cfg80211_assoc_timeout(sdata->dev, bss);
d0d1a12f 3929 drv_event_callback(sdata->local, sdata, &event);
66e67e41 3930 }
89afe614 3931 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
8d61ffa5 3932 run_again(sdata, ifmgd->assoc_data->timeout);
66e67e41 3933
392b9ffb 3934 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
b291ba11 3935 ifmgd->associated) {
a43abf29 3936 u8 bssid[ETH_ALEN];
72a8a3ed 3937 int max_tries;
a43abf29 3938
0c1ad2ca 3939 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 3940
72a8a3ed 3941 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
180205bd 3942 max_tries = max_nullfunc_tries;
72a8a3ed 3943 else
180205bd 3944 max_tries = max_probe_tries;
72a8a3ed 3945
4e5ff376
FF		 3946 /* ACK received for nullfunc probing frame */
3947 if (!ifmgd->probe_send_count)
3948 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 3949 else if (ifmgd->nullfunc_failed) {
3950 if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3951 mlme_dbg(sdata,
3952 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3953 bssid, ifmgd->probe_send_count,
3954 max_tries);
04ac3c0e
FF		 3955 ieee80211_mgd_probe_ap_send(sdata);
3956 } else {
bdcbd8e0
JB		 3957 mlme_dbg(sdata,
3958 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3959 bssid);
95acac61 3960 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1
JB		 3961 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3962 false);
04ac3c0e
FF		 3963 }
3964 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
8d61ffa5 3965 run_again(sdata, ifmgd->probe_timeout);
04ac3c0e 3966 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
bdcbd8e0
JB		 3967 mlme_dbg(sdata,
3968 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3969 bssid, probe_wait_ms);
95acac61 3970 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 3971 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
04ac3c0e 3972 } else if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3973 mlme_dbg(sdata,
3974 "No probe response from AP %pM after %dms, try %d/%i\n",
3975 bssid, probe_wait_ms,
3976 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 3977 ieee80211_mgd_probe_ap_send(sdata);
3978 } else {
b291ba11
JB		 3979 /*
3980 * We actually lost the connection ... or did we?
3981 * Let's make sure!
3982 */
b38afa87
BG		 3983 wiphy_debug(local->hw.wiphy,
3984 "%s: No probe response from AP %pM"
3985 " after %dms, disconnecting.\n",
3986 sdata->name,
180205bd 3987 bssid, probe_wait_ms);
04ac3c0e 3988
95acac61 3989 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 3990 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
b291ba11
JB		 3991 }
3992 }
3993
8d61ffa5 3994 sdata_unlock(sdata);
f0706e82
JB		 3995}
3996
b291ba11
JB		 3997static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3998{
3999 struct ieee80211_sub_if_data *sdata =
4000 (struct ieee80211_sub_if_data *) data;
0c21e632 4001 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 4002
0c21e632 4003 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
e5593f56
MK		 4004 return;
4005
682bd38b 4006 sdata->u.mgd.connection_loss = false;
1e4dcd01
JO		 4007 ieee80211_queue_work(&sdata->local->hw,
4008 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 4009}
4010
4011static void ieee80211_sta_conn_mon_timer(unsigned long data)
4012{
4013 struct ieee80211_sub_if_data *sdata =
4014 (struct ieee80211_sub_if_data *) data;
4015 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4016 struct ieee80211_local *local = sdata->local;
4017
0c21e632 4018 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
e5593f56
MK		 4019 return;
4020
42935eca 4021 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 4022}
4023
4024static void ieee80211_sta_monitor_work(struct work_struct *work)
4025{
4026 struct ieee80211_sub_if_data *sdata =
4027 container_of(work, struct ieee80211_sub_if_data,
4028 u.mgd.monitor_work);
4029
4030 ieee80211_mgd_probe_ap(sdata, false);
4031}
4032
9c6bd790
JB		 4033static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
4034{
494f1fe5
EP		 4035 u32 flags;
4036
ad935687 4037 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
925e64c3 4038 __ieee80211_stop_poll(sdata);
ad935687 4039
b291ba11 4040 /* let's probe the connection once */
494f1fe5
EP		 4041 flags = sdata->local->hw.flags;
4042 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
4043 ieee80211_queue_work(&sdata->local->hw,
4044 &sdata->u.mgd.monitor_work);
b291ba11 4045 /* and do all the other regular work too */
64592c8f 4046 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 4047 }
9c6bd790 4048}
f0706e82 4049
b8360ab8 4050#ifdef CONFIG_PM
1a1cb744
JB		 4051void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
4052{
4053 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4054 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4055
4056 sdata_lock(sdata);
4057
c52666ae
EG		 4058 if (ifmgd->auth_data || ifmgd->assoc_data) {
4059 const u8 *bssid = ifmgd->auth_data ?
4060 ifmgd->auth_data->bss->bssid :
4061 ifmgd->assoc_data->bss->bssid;
4062
1a1cb744 4063 /*
c52666ae
EG		 4064 * If we are trying to authenticate / associate while suspending,
4065 * cfg80211 won't know and won't actually abort those attempts,
4066 * thus we need to do that ourselves.
1a1cb744 4067 */
c52666ae 4068 ieee80211_send_deauth_disassoc(sdata, bssid,
1a1cb744
JB		 4069 IEEE80211_STYPE_DEAUTH,
4070 WLAN_REASON_DEAUTH_LEAVING,
4071 false, frame_buf);
c52666ae
EG		 4072 if (ifmgd->assoc_data)
4073 ieee80211_destroy_assoc_data(sdata, false);
4074 if (ifmgd->auth_data)
4075 ieee80211_destroy_auth_data(sdata, false);
1a1cb744
JB		 4076 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4077 IEEE80211_DEAUTH_FRAME_LEN);
4078 }
4079
be72afe0
JB		 4080 /* This is a bit of a hack - we should find a better and more generic
4081 * solution to this. Normally when suspending, cfg80211 will in fact
4082 * deauthenticate. However, it doesn't (and cannot) stop an ongoing
4083 * auth (not so important) or assoc (this is the problem) process.
4084 *
4085 * As a consequence, it can happen that we are in the process of both
4086 * associating and suspending, and receive an association response
4087 * after cfg80211 has checked if it needs to disconnect, but before
4088 * we actually set the flag to drop incoming frames. This will then
4089 * cause the workqueue flush to process the association response in
4090 * the suspend, resulting in a successful association just before it
4091 * tries to remove the interface from the driver, which now though
4092 * has a channel context assigned ... this results in issues.
4093 *
4094 * To work around this (for now) simply deauth here again if we're
4095 * now connected.
4096 */
4097 if (ifmgd->associated && !sdata->local->wowlan) {
4098 u8 bssid[ETH_ALEN];
4099 struct cfg80211_deauth_request req = {
4100 .reason_code = WLAN_REASON_DEAUTH_LEAVING,
4101 .bssid = bssid,
4102 };
4103
4104 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4105 ieee80211_mgd_deauth(sdata, &req);
4106 }
4107
1a1cb744
JB		 4108 sdata_unlock(sdata);
4109}
4110
b8360ab8
JB		 4111void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
4112{
4113 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4114
8d61ffa5 4115 sdata_lock(sdata);
b8360ab8 4116 if (!ifmgd->associated) {
8d61ffa5 4117 sdata_unlock(sdata);
b8360ab8
JB		 4118 return;
4119 }
4120
4121 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
4122 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
4123 mlme_dbg(sdata, "driver requested disconnect after resume\n");
4124 ieee80211_sta_connection_lost(sdata,
4125 ifmgd->associated->bssid,
4126 WLAN_REASON_UNSPECIFIED,
4127 true);
8d61ffa5 4128 sdata_unlock(sdata);
b8360ab8
JB		 4129 return;
4130 }
8d61ffa5 4131 sdata_unlock(sdata);
b8360ab8
JB		 4132}
4133#endif
4134
9c6bd790
JB		 4135/* interface setup */
4136void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 4137{
46900298 4138 struct ieee80211_if_managed *ifmgd;
988c0f72 4139
46900298 4140 ifmgd = &sdata->u.mgd;
b291ba11 4141 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 4142 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 4143 INIT_WORK(&ifmgd->beacon_connection_loss_work,
4144 ieee80211_beacon_connection_loss_work);
882a7c69
JB		 4145 INIT_WORK(&ifmgd->csa_connection_drop_work,
4146 ieee80211_csa_connection_drop_work);
687da132 4147 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
81dd2b88
AN		 4148 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
4149 ieee80211_tdls_peer_del_work);
46900298 4150 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 4151 (unsigned long) sdata);
b291ba11
JB		 4152 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
4153 (unsigned long) sdata);
4154 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
4155 (unsigned long) sdata);
46900298 4156 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 4157 (unsigned long) sdata);
02219b3a
JB		 4158 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
4159 ieee80211_sta_handle_tspec_ac_params_wk);
9c6bd790 4160
ab1faead 4161 ifmgd->flags = 0;
1478acb3 4162 ifmgd->powersave = sdata->wdev.ps;
219c3867
AB		 4163 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
4164 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
67baf663 4165 ifmgd->p2p_noa_index = -1;
bbbdff9e 4166
0d8614b4 4167 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
0f78231b
JB		 4168 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
4169 else
4170 ifmgd->req_smps = IEEE80211_SMPS_OFF;
1277b4a9
LK		 4171
4172 /* Setup TDLS data */
4173 spin_lock_init(&ifmgd->teardown_lock);
4174 ifmgd->teardown_skb = NULL;
4175 ifmgd->orig_teardown_skb = NULL;
f0706e82
JB		 4176}
4177
77fdaa12
JB		 4178/* scan finished notification */
4179void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 4180{
31ee67a1 4181 struct ieee80211_sub_if_data *sdata;
60f8b39c 4182
77fdaa12
JB		 4183 /* Restart STA timers */
4184 rcu_read_lock();
370bd005
BG		 4185 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4186 if (ieee80211_sdata_running(sdata))
4187 ieee80211_restart_sta_timer(sdata);
4188 }
77fdaa12
JB		 4189 rcu_read_unlock();
4190}
60f8b39c 4191
77fdaa12
JB		 4192int ieee80211_max_network_latency(struct notifier_block *nb,
4193 unsigned long data, void *dummy)
4194{
4195 s32 latency_usec = (s32) data;
4196 struct ieee80211_local *local =
4197 container_of(nb, struct ieee80211_local,
4198 network_latency_notifier);
1fa6f4af 4199
77fdaa12
JB		 4200 mutex_lock(&local->iflist_mtx);
4201 ieee80211_recalc_ps(local, latency_usec);
4202 mutex_unlock(&local->iflist_mtx);
dfe67012 4203
8bd811aa 4204 return NOTIFY_OK;
9c6bd790
JB		 4205}
4206
f2d9d270
JB		 4207static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
4208 struct cfg80211_bss *cbss)
4209{
4210 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4211 const u8 *ht_cap_ie, *vht_cap_ie;
4212 const struct ieee80211_ht_cap *ht_cap;
4213 const struct ieee80211_vht_cap *vht_cap;
4214 u8 chains = 1;
4215
4216 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
4217 return chains;
4218
9caf0364 4219 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
f2d9d270
JB		 4220 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
4221 ht_cap = (void *)(ht_cap_ie + 2);
4222 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4223 /*
4224 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4225 * "Tx Unequal Modulation Supported" fields.
4226 */
4227 }
4228
4229 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
4230 return chains;
4231
9caf0364 4232 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
f2d9d270
JB		 4233 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
4234 u8 nss;
4235 u16 tx_mcs_map;
4236
4237 vht_cap = (void *)(vht_cap_ie + 2);
4238 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4239 for (nss = 8; nss > 0; nss--) {
4240 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4241 IEEE80211_VHT_MCS_NOT_SUPPORTED)
4242 break;
4243 }
4244 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4245 chains = max(chains, nss);
4246 }
4247
4248 return chains;
4249}
4250
b17166a7
JB		 4251static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4252 struct cfg80211_bss *cbss)
a1cf775d
JB		 4253{
4254 struct ieee80211_local *local = sdata->local;
4255 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
53b954ee 4256 const struct ieee80211_ht_cap *ht_cap = NULL;
24398e39 4257 const struct ieee80211_ht_operation *ht_oper = NULL;
f2d9d270 4258 const struct ieee80211_vht_operation *vht_oper = NULL;
24398e39 4259 struct ieee80211_supported_band *sband;
4bf88530 4260 struct cfg80211_chan_def chandef;
f2d9d270 4261 int ret;
a1cf775d 4262
24398e39
JB		 4263 sband = local->hw.wiphy->bands[cbss->channel->band];
4264
f2d9d270
JB		 4265 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
4266 IEEE80211_STA_DISABLE_80P80MHZ |
4267 IEEE80211_STA_DISABLE_160MHZ);
4268
9caf0364
JB		 4269 rcu_read_lock();
4270
f2d9d270
JB		 4271 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
4272 sband->ht_cap.ht_supported) {
53b954ee 4273 const u8 *ht_oper_ie, *ht_cap_ie;
24398e39 4274
9caf0364 4275 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
24398e39
JB		 4276 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
4277 ht_oper = (void *)(ht_oper_ie + 2);
08e6effa 4278
53b954ee
EP		 4279 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4280 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
4281 ht_cap = (void *)(ht_cap_ie + 2);
4282
4283 if (!ht_cap) {
08e6effa
JB		 4284 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4285 ht_oper = NULL;
4286 }
24398e39
JB		 4287 }
4288
f2d9d270
JB		 4289 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4290 sband->vht_cap.vht_supported) {
08e6effa 4291 const u8 *vht_oper_ie, *vht_cap;
f2d9d270 4292
9caf0364
JB		 4293 vht_oper_ie = ieee80211_bss_get_ie(cbss,
4294 WLAN_EID_VHT_OPERATION);
f2d9d270
JB		 4295 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
4296 vht_oper = (void *)(vht_oper_ie + 2);
4297 if (vht_oper && !ht_oper) {
4298 vht_oper = NULL;
bdcbd8e0 4299 sdata_info(sdata,
f2d9d270 4300 "AP advertised VHT without HT, disabling both\n");
cb145022
JB		 4301 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4302 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
24398e39 4303 }
08e6effa
JB		 4304
4305 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4306 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
4307 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4308 vht_oper = NULL;
4309 }
24398e39
JB		 4310 }
4311
f2d9d270
JB		 4312 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
4313 cbss->channel,
53b954ee 4314 ht_cap, ht_oper, vht_oper,
5cdaed1e 4315 &chandef, false);
04ecd257 4316
f2d9d270
JB		 4317 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
4318 local->rx_chains);
24398e39 4319
9caf0364
JB		 4320 rcu_read_unlock();
4321
04ecd257
JB		 4322 /* will change later if needed */
4323 sdata->smps_mode = IEEE80211_SMPS_OFF;
4324
34a3740d 4325 mutex_lock(&local->mtx);
f2d9d270
JB		 4326 /*
4327 * If this fails (possibly due to channel context sharing
4328 * on incompatible channels, e.g. 80+80 and 160 sharing the
4329 * same control channel) try to use a smaller bandwidth.
4330 */
4331 ret = ieee80211_vif_use_channel(sdata, &chandef,
4332 IEEE80211_CHANCTX_SHARED);
0418a445
SW		 4333
4334 /* don't downgrade for 5 and 10 MHz channels, though. */
4335 if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4336 chandef.width == NL80211_CHAN_WIDTH_10)
34a3740d 4337 goto out;
0418a445 4338
d601cd8d 4339 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
e6b7cde4 4340 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
d601cd8d
JB		 4341 ret = ieee80211_vif_use_channel(sdata, &chandef,
4342 IEEE80211_CHANCTX_SHARED);
4343 }
34a3740d
JB		 4344 out:
4345 mutex_unlock(&local->mtx);
f2d9d270 4346 return ret;
b17166a7
JB		 4347}
4348
4349static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
c1041f10
CRI		 4350 struct cfg80211_bss *cbss, bool assoc,
4351 bool override)
b17166a7
JB		 4352{
4353 struct ieee80211_local *local = sdata->local;
4354 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4355 struct ieee80211_bss *bss = (void *)cbss->priv;
4356 struct sta_info *new_sta = NULL;
179b8fc7 4357 struct ieee80211_supported_band *sband;
c1041f10 4358 bool have_sta = false;
b17166a7
JB		 4359 int err;
4360
179b8fc7
CRI		 4361 sband = local->hw.wiphy->bands[cbss->channel->band];
4362
b17166a7
JB		 4363 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
4364 return -EINVAL;
4365
4366 if (assoc) {
4367 rcu_read_lock();
4368 have_sta = sta_info_get(sdata, cbss->bssid);
4369 rcu_read_unlock();
4370 }
4371
4372 if (!have_sta) {
4373 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4374 if (!new_sta)
4375 return -ENOMEM;
4376 }
179b8fc7 4377
c1041f10 4378 if (new_sta || override) {
179b8fc7
CRI		 4379 err = ieee80211_prep_channel(sdata, cbss);
4380 if (err) {
4381 if (new_sta)
4382 sta_info_free(local, new_sta);
4383 return -EINVAL;
4384 }
4385 }
4386
13e0c8e3 4387 if (new_sta) {
5d6a1b06
JB		 4388 u32 rates = 0, basic_rates = 0;
4389 bool have_higher_than_11mbit;
4390 int min_rate = INT_MAX, min_rate_index = -1;
2103dec1 4391 struct ieee80211_chanctx_conf *chanctx_conf;
8cef2c9d 4392 const struct cfg80211_bss_ies *ies;
179b8fc7 4393 int shift = ieee80211_vif_get_shift(&sdata->vif);
2103dec1 4394 u32 rate_flags;
b17166a7 4395
2103dec1
SW		 4396 rcu_read_lock();
4397 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4398 if (WARN_ON(!chanctx_conf)) {
4399 rcu_read_unlock();
c368ddaa 4400 sta_info_free(local, new_sta);
2103dec1
SW		 4401 return -EINVAL;
4402 }
4403 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
4404 rcu_read_unlock();
5d6a1b06 4405
5d6a1b06
JB		 4406 ieee80211_get_rates(sband, bss->supp_rates,
4407 bss->supp_rates_len,
4408 &rates, &basic_rates,
4409 &have_higher_than_11mbit,
2103dec1
SW		 4410 &min_rate, &min_rate_index,
4411 shift, rate_flags);
5d6a1b06
JB		 4412
4413 /*
4414 * This used to be a workaround for basic rates missing
4415 * in the association response frame. Now that we no
4416 * longer use the basic rates from there, it probably
4417 * doesn't happen any more, but keep the workaround so
4418 * in case some *other* APs are buggy in different ways
4419 * we can connect -- with a warning.
4420 */
4421 if (!basic_rates && min_rate_index >= 0) {
bdcbd8e0
JB		 4422 sdata_info(sdata,
4423 "No basic rates, using min rate instead\n");
5d6a1b06
JB		 4424 basic_rates = BIT(min_rate_index);
4425 }
4426
13e0c8e3 4427 new_sta->sta.supp_rates[cbss->channel->band] = rates;
5d6a1b06
JB		 4428 sdata->vif.bss_conf.basic_rates = basic_rates;
4429
4430 /* cf. IEEE 802.11 9.2.12 */
55de908a 4431 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
5d6a1b06
JB		 4432 have_higher_than_11mbit)
4433 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
4434 else
4435 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
4436
4437 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
4438
8c358bcd
JB		 4439 /* set timing information */
4440 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
8cef2c9d 4441 rcu_read_lock();
ef429dad
JB		 4442 ies = rcu_dereference(cbss->beacon_ies);
4443 if (ies) {
4444 const u8 *tim_ie;
4445
4446 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4447 sdata->vif.bss_conf.sync_device_ts =
4448 bss->device_ts_beacon;
4449 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4450 ies->data, ies->len);
4451 if (tim_ie && tim_ie[1] >= 2)
4452 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
4453 else
4454 sdata->vif.bss_conf.sync_dtim_count = 0;
4455 } else if (!(local->hw.flags &
4456 IEEE80211_HW_TIMING_BEACON_ONLY)) {
4457 ies = rcu_dereference(cbss->proberesp_ies);
4458 /* must be non-NULL since beacon IEs were NULL */
4459 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4460 sdata->vif.bss_conf.sync_device_ts =
4461 bss->device_ts_presp;
4462 sdata->vif.bss_conf.sync_dtim_count = 0;
4463 } else {
4464 sdata->vif.bss_conf.sync_tsf = 0;
4465 sdata->vif.bss_conf.sync_device_ts = 0;
4466 sdata->vif.bss_conf.sync_dtim_count = 0;
4467 }
8cef2c9d 4468 rcu_read_unlock();
8c358bcd
JB		 4469
4470 /* tell driver about BSSID, basic rates and timing */
5d6a1b06 4471 ieee80211_bss_info_change_notify(sdata,
8c358bcd
JB		 4472 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4473 BSS_CHANGED_BEACON_INT);
a1cf775d
JB		 4474
4475 if (assoc)
13e0c8e3 4476 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
a1cf775d 4477
13e0c8e3
JB		 4478 err = sta_info_insert(new_sta);
4479 new_sta = NULL;
a1cf775d 4480 if (err) {
bdcbd8e0
JB		 4481 sdata_info(sdata,
4482 "failed to insert STA entry for the AP (error %d)\n",
4483 err);
a1cf775d
JB		 4484 return err;
4485 }
4486 } else
b203ca39 4487 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
a1cf775d 4488
7d830a19
DS		 4489 /* Cancel scan to ensure that nothing interferes with connection */
4490 if (local->scanning)
4491 ieee80211_scan_cancel(local);
4492
a1cf775d
JB		 4493 return 0;
4494}
4495
77fdaa12
JB		 4496/* config hooks */
4497int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4498 struct cfg80211_auth_request *req)
9c6bd790 4499{
66e67e41
JB		 4500 struct ieee80211_local *local = sdata->local;
4501 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4502 struct ieee80211_mgd_auth_data *auth_data;
77fdaa12 4503 u16 auth_alg;
66e67e41
JB		 4504 int err;
4505
4506 /* prepare auth data structure */
9c6bd790 4507
77fdaa12
JB		 4508 switch (req->auth_type) {
4509 case NL80211_AUTHTYPE_OPEN_SYSTEM:
4510 auth_alg = WLAN_AUTH_OPEN;
4511 break;
4512 case NL80211_AUTHTYPE_SHARED_KEY:
66e67e41 4513 if (IS_ERR(local->wep_tx_tfm))
9dca9c49 4514 return -EOPNOTSUPP;
77fdaa12
JB		 4515 auth_alg = WLAN_AUTH_SHARED_KEY;
4516 break;
4517 case NL80211_AUTHTYPE_FT:
4518 auth_alg = WLAN_AUTH_FT;
4519 break;
4520 case NL80211_AUTHTYPE_NETWORK_EAP:
4521 auth_alg = WLAN_AUTH_LEAP;
4522 break;
6b8ece3a
JM		 4523 case NL80211_AUTHTYPE_SAE:
4524 auth_alg = WLAN_AUTH_SAE;
4525 break;
77fdaa12
JB		 4526 default:
4527 return -EOPNOTSUPP;
60f8b39c 4528 }
77fdaa12 4529
6b8ece3a
JM		 4530 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
4531 req->ie_len, GFP_KERNEL);
66e67e41 4532 if (!auth_data)
9c6bd790 4533 return -ENOMEM;
77fdaa12 4534
66e67e41 4535 auth_data->bss = req->bss;
77fdaa12 4536
6b8ece3a
JM		 4537 if (req->sae_data_len >= 4) {
4538 __le16 *pos = (__le16 *) req->sae_data;
4539 auth_data->sae_trans = le16_to_cpu(pos[0]);
4540 auth_data->sae_status = le16_to_cpu(pos[1]);
4541 memcpy(auth_data->data, req->sae_data + 4,
4542 req->sae_data_len - 4);
4543 auth_data->data_len += req->sae_data_len - 4;
4544 }
4545
77fdaa12 4546 if (req->ie && req->ie_len) {
6b8ece3a
JM		 4547 memcpy(&auth_data->data[auth_data->data_len],
4548 req->ie, req->ie_len);
4549 auth_data->data_len += req->ie_len;
9c6bd790 4550 }
77fdaa12 4551
fffd0934 4552 if (req->key && req->key_len) {
66e67e41
JB		 4553 auth_data->key_len = req->key_len;
4554 auth_data->key_idx = req->key_idx;
4555 memcpy(auth_data->key, req->key, req->key_len);
fffd0934
JB		 4556 }
4557
66e67e41 4558 auth_data->algorithm = auth_alg;
60f8b39c 4559
66e67e41 4560 /* try to authenticate/probe */
2a33bee2 4561
66e67e41
JB		 4562 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4563 ifmgd->assoc_data) {
4564 err = -EBUSY;
4565 goto err_free;
2a33bee2
GE		 4566 }
4567
66e67e41
JB		 4568 if (ifmgd->auth_data)
4569 ieee80211_destroy_auth_data(sdata, false);
2a33bee2 4570
66e67e41
JB		 4571 /* prep auth_data so we don't go into idle on disassoc */
4572 ifmgd->auth_data = auth_data;
af6b6374 4573
7b119dc0
JB		 4574 if (ifmgd->associated) {
4575 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4576
4577 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4578 WLAN_REASON_UNSPECIFIED,
4579 false, frame_buf);
4580
a90faa9d
EG		 4581 ieee80211_report_disconnect(sdata, frame_buf,
4582 sizeof(frame_buf), true,
4583 WLAN_REASON_UNSPECIFIED);
7b119dc0 4584 }
af6b6374 4585
bdcbd8e0 4586 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
e5b900d2 4587
c1041f10 4588 err = ieee80211_prep_connection(sdata, req->bss, false, false);
a1cf775d 4589 if (err)
66e67e41 4590 goto err_clear;
af6b6374 4591
66e67e41
JB		 4592 err = ieee80211_probe_auth(sdata);
4593 if (err) {
66e67e41
JB		 4594 sta_info_destroy_addr(sdata, req->bss->bssid);
4595 goto err_clear;
4596 }
4597
4598 /* hold our own reference */
5b112d3d 4599 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
8d61ffa5 4600 return 0;
66e67e41
JB		 4601
4602 err_clear:
c84a67a2 4603 eth_zero_addr(ifmgd->bssid);
3d2abdfd 4604 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 4605 ifmgd->auth_data = NULL;
4606 err_free:
4607 kfree(auth_data);
66e67e41 4608 return err;
af6b6374
JB		 4609}
4610
095d81ce
JB		 4611static bool ieee80211_usable_wmm_params(struct ieee80211_sub_if_data *sdata,
4612 const u8 *wmm_param, int len)
4613{
4614 const u8 *pos;
4615 size_t left;
4616
4617 if (len < 8)
4618 return false;
4619
4620 if (wmm_param[5] != 1 /* version */)
4621 return false;
4622
4623 pos = wmm_param + 8;
4624 left = len - 8;
4625
4626 for (; left >= 4; left -= 4, pos += 4) {
4627 u8 aifsn = pos[0] & 0x0f;
4628 u8 ecwmin = pos[1] & 0x0f;
4629 u8 ecwmax = (pos[1] & 0xf0) >> 4;
4630 int aci = (pos[0] >> 5) & 0x03;
4631
4632 if (aifsn < 2) {
4633 sdata_info(sdata,
4634 "AP has invalid WMM params (AIFSN=%d for ACI %d), disabling WMM\n",
4635 aifsn, aci);
4636 return false;
4637 }
4638 if (ecwmin > ecwmax) {
4639 sdata_info(sdata,
4640 "AP has invalid WMM params (ECWmin/max=%d/%d for ACI %d), disabling WMM\n",
4641 ecwmin, ecwmax, aci);
4642 return false;
4643 }
4644 }
4645
4646 return true;
4647}
4648
77fdaa12
JB		 4649int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4650 struct cfg80211_assoc_request *req)
f0706e82 4651{
66e67e41 4652 struct ieee80211_local *local = sdata->local;
77fdaa12 4653 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 4654 struct ieee80211_bss *bss = (void *)req->bss->priv;
66e67e41 4655 struct ieee80211_mgd_assoc_data *assoc_data;
c65dd147 4656 const struct cfg80211_bss_ies *beacon_ies;
4e74bfdb 4657 struct ieee80211_supported_band *sband;
b08fbbd8 4658 const u8 *ssidie, *ht_ie, *vht_ie;
2a33bee2 4659 int i, err;
c1041f10 4660 bool override = false;
f0706e82 4661
66e67e41
JB		 4662 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4663 if (!assoc_data)
4664 return -ENOMEM;
4665
9caf0364
JB		 4666 rcu_read_lock();
4667 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4668 if (!ssidie) {
4669 rcu_read_unlock();
4670 kfree(assoc_data);
4671 return -EINVAL;
4672 }
4673 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4674 assoc_data->ssid_len = ssidie[1];
4675 rcu_read_unlock();
4676
7b119dc0
JB		 4677 if (ifmgd->associated) {
4678 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4679
4680 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4681 WLAN_REASON_UNSPECIFIED,
4682 false, frame_buf);
4683
a90faa9d
EG		 4684 ieee80211_report_disconnect(sdata, frame_buf,
4685 sizeof(frame_buf), true,
4686 WLAN_REASON_UNSPECIFIED);
7b119dc0 4687 }
66e67e41
JB		 4688
4689 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4690 err = -EBUSY;
4691 goto err_free;
af6b6374 4692 }
77fdaa12 4693
66e67e41
JB		 4694 if (ifmgd->assoc_data) {
4695 err = -EBUSY;
4696 goto err_free;
4697 }
77fdaa12 4698
66e67e41
JB		 4699 if (ifmgd->auth_data) {
4700 bool match;
4701
4702 /* keep sta info, bssid if matching */
b203ca39 4703 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
66e67e41 4704 ieee80211_destroy_auth_data(sdata, match);
2a33bee2
GE		 4705 }
4706
66e67e41 4707 /* prepare assoc data */
095d81ce 4708
d8ec4433
JO		 4709 ifmgd->beacon_crc_valid = false;
4710
095d81ce
JB		 4711 assoc_data->wmm = bss->wmm_used &&
4712 (local->hw.queues >= IEEE80211_NUM_ACS);
4713 if (assoc_data->wmm) {
4714 /* try to check validity of WMM params IE */
4715 const struct cfg80211_bss_ies *ies;
4716 const u8 *wp, *start, *end;
4717
4718 rcu_read_lock();
4719 ies = rcu_dereference(req->bss->ies);
4720 start = ies->data;
4721 end = start + ies->len;
4722
4723 while (true) {
4724 wp = cfg80211_find_vendor_ie(
4725 WLAN_OUI_MICROSOFT,
4726 WLAN_OUI_TYPE_MICROSOFT_WMM,
4727 start, end - start);
4728 if (!wp)
4729 break;
4730 start = wp + wp[1] + 2;
4731 /* if this IE is too short, try the next */
4732 if (wp[1] <= 4)
4733 continue;
4734 /* if this IE is WMM params, we found what we wanted */
4735 if (wp[6] == 1)
4736 break;
4737 }
4738
4739 if (!wp || !ieee80211_usable_wmm_params(sdata, wp + 2,
4740 wp[1] - 2)) {
4741 assoc_data->wmm = false;
4742 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
4743 }
4744 rcu_read_unlock();
4745 }
4746
de5036aa
JB		 4747 /*
4748 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4749 * We still associate in non-HT mode (11a/b/g) if any one of these
4750 * ciphers is configured as pairwise.
4751 * We can set this to true for non-11n hardware, that'll be checked
4752 * separately along with the peer capabilities.
4753 */
1c4cb928 4754 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
77fdaa12
JB		 4755 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4756 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
1c4cb928 4757 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
a8243b72 4758 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
d545daba 4759 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
1c4cb928 4760 netdev_info(sdata->dev,
d545daba 4761 "disabling HT/VHT due to WEP/TKIP use\n");
1c4cb928
JB		 4762 }
4763 }
77fdaa12 4764
4e74bfdb
JB		 4765 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4766 sband = local->hw.wiphy->bands[req->bss->channel->band];
4767 if (!sband->ht_cap.ht_supported ||
095d81ce
JB		 4768 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4769 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
a8243b72 4770 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
095d81ce
JB		 4771 if (!bss->wmm_used &&
4772 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
1b49de26
JB		 4773 netdev_info(sdata->dev,
4774 "disabling HT as WMM/QoS is not supported by the AP\n");
1c4cb928 4775 }
4e74bfdb 4776
d545daba
MP		 4777 /* disable VHT if we don't support it or the AP doesn't use WMM */
4778 if (!sband->vht_cap.vht_supported ||
095d81ce
JB		 4779 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4780 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
d545daba 4781 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
095d81ce
JB		 4782 if (!bss->wmm_used &&
4783 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
1b49de26
JB		 4784 netdev_info(sdata->dev,
4785 "disabling VHT as WMM/QoS is not supported by the AP\n");
d545daba
MP		 4786 }
4787
ef96a842
BG		 4788 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4789 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4790 sizeof(ifmgd->ht_capa_mask));
4791
dd5ecfea
JB		 4792 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4793 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4794 sizeof(ifmgd->vht_capa_mask));
4795
77fdaa12 4796 if (req->ie && req->ie_len) {
66e67e41
JB		 4797 memcpy(assoc_data->ie, req->ie, req->ie_len);
4798 assoc_data->ie_len = req->ie_len;
4799 }
f679f65d 4800
66e67e41 4801 assoc_data->bss = req->bss;
f679f65d 4802
af6b6374
JB		 4803 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4804 if (ifmgd->powersave)
04ecd257 4805 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
af6b6374 4806 else
04ecd257 4807 sdata->smps_mode = IEEE80211_SMPS_OFF;
af6b6374 4808 } else
04ecd257 4809 sdata->smps_mode = ifmgd->req_smps;
af6b6374 4810
66e67e41 4811 assoc_data->capability = req->bss->capability;
66e67e41
JB		 4812 assoc_data->supp_rates = bss->supp_rates;
4813 assoc_data->supp_rates_len = bss->supp_rates_len;
9dde6423 4814
9caf0364 4815 rcu_read_lock();
9dde6423
JB		 4816 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4817 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4818 assoc_data->ap_ht_param =
4819 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4820 else
a8243b72 4821 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
b08fbbd8
JB		 4822 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4823 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4824 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4825 sizeof(struct ieee80211_vht_cap));
4826 else
4827 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
9caf0364 4828 rcu_read_unlock();
63f170e0 4829
848955cc
JB		 4830 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
4831 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK),
4832 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
4833 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
4834
ab13315a 4835 if (bss->wmm_used && bss->uapsd_supported &&
848955cc 4836 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
76f0303d 4837 assoc_data->uapsd = true;
ab13315a
KV		 4838 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4839 } else {
76f0303d 4840 assoc_data->uapsd = false;
ab13315a
KV		 4841 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4842 }
4843
77fdaa12 4844 if (req->prev_bssid)
66e67e41 4845 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12
JB		 4846
4847 if (req->use_mfp) {
4848 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4849 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4850 } else {
4851 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4852 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4853 }
4854
cd2f5dd7
AK		 4855 if (req->flags & ASSOC_REQ_USE_RRM)
4856 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
4857 else
4858 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
4859
77fdaa12
JB		 4860 if (req->crypto.control_port)
4861 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4862 else
4863 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4864
a621fa4d
JB		 4865 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4866 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
2475b1cc
MS		 4867 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
4868 sdata->vif.type);
a621fa4d 4869
66e67e41
JB		 4870 /* kick off associate process */
4871
4872 ifmgd->assoc_data = assoc_data;
826262c3 4873 ifmgd->dtim_period = 0;
989c6505 4874 ifmgd->have_beacon = false;
66e67e41 4875
c1041f10
CRI		 4876 /* override HT/VHT configuration only if the AP and we support it */
4877 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
4878 struct ieee80211_sta_ht_cap sta_ht_cap;
4879
4880 if (req->flags & ASSOC_REQ_DISABLE_HT)
4881 override = true;
4882
4883 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
4884 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
4885
4886 /* check for 40 MHz disable override */
4887 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) &&
4888 sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
4889 !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
4890 override = true;
4891
4892 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4893 req->flags & ASSOC_REQ_DISABLE_VHT)
4894 override = true;
4895 }
4896
4897 if (req->flags & ASSOC_REQ_DISABLE_HT) {
4898 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4899 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4900 }
4901
4902 if (req->flags & ASSOC_REQ_DISABLE_VHT)
4903 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4904
4905 err = ieee80211_prep_connection(sdata, req->bss, true, override);
a1cf775d
JB		 4906 if (err)
4907 goto err_clear;
66e67e41 4908
c65dd147
EG		 4909 rcu_read_lock();
4910 beacon_ies = rcu_dereference(req->bss->beacon_ies);
826262c3 4911
c65dd147
EG		 4912 if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC &&
4913 !beacon_ies) {
4914 /*
4915 * Wait up to one beacon interval ...
4916 * should this be more if we miss one?
4917 */
4918 sdata_info(sdata, "waiting for beacon from %pM\n",
4919 ifmgd->bssid);
4920 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
89afe614 4921 assoc_data->timeout_started = true;
c65dd147
EG		 4922 assoc_data->need_beacon = true;
4923 } else if (beacon_ies) {
4924 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4925 beacon_ies->data,
4926 beacon_ies->len);
ef429dad
JB		 4927 u8 dtim_count = 0;
4928
c65dd147
EG		 4929 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4930 const struct ieee80211_tim_ie *tim;
4931 tim = (void *)(tim_ie + 2);
4932 ifmgd->dtim_period = tim->dtim_period;
ef429dad 4933 dtim_count = tim->dtim_count;
826262c3 4934 }
989c6505 4935 ifmgd->have_beacon = true;
66e67e41 4936 assoc_data->timeout = jiffies;
89afe614 4937 assoc_data->timeout_started = true;
ef429dad
JB		 4938
4939 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
4940 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4941 sdata->vif.bss_conf.sync_device_ts =
4942 bss->device_ts_beacon;
4943 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4944 }
c65dd147
EG		 4945 } else {
4946 assoc_data->timeout = jiffies;
89afe614 4947 assoc_data->timeout_started = true;
66e67e41 4948 }
c65dd147
EG		 4949 rcu_read_unlock();
4950
8d61ffa5 4951 run_again(sdata, assoc_data->timeout);
66e67e41 4952
fcff4f10
PS		 4953 if (bss->corrupt_data) {
4954 char *corrupt_type = "data";
4955 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4956 if (bss->corrupt_data &
4957 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4958 corrupt_type = "beacon and probe response";
4959 else
4960 corrupt_type = "beacon";
4961 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4962 corrupt_type = "probe response";
bdcbd8e0
JB		 4963 sdata_info(sdata, "associating with AP with corrupt %s\n",
4964 corrupt_type);
fcff4f10
PS		 4965 }
4966
8d61ffa5 4967 return 0;
66e67e41 4968 err_clear:
c84a67a2 4969 eth_zero_addr(ifmgd->bssid);
3d2abdfd 4970 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 4971 ifmgd->assoc_data = NULL;
4972 err_free:
4973 kfree(assoc_data);
66e67e41 4974 return err;
f0706e82
JB		 4975}
4976
77fdaa12 4977int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
63c9c5e7 4978 struct cfg80211_deauth_request *req)
f0706e82 4979{
46900298 4980 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 4981 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
6863255b 4982 bool tx = !req->local_state_change;
f0706e82 4983
c9c3a060
JB		 4984 if (ifmgd->auth_data &&
4985 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
4986 sdata_info(sdata,
4987 "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
4988 req->bssid, req->reason_code,
4989 ieee80211_get_reason_code_string(req->reason_code));
0ff71613 4990
8c7d857c 4991 drv_mgd_prepare_tx(sdata->local, sdata);
37ad3888
JB		 4992 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4993 IEEE80211_STYPE_DEAUTH,
6863255b 4994 req->reason_code, tx,
37ad3888 4995 frame_buf);
86552017 4996 ieee80211_destroy_auth_data(sdata, false);
a90faa9d
EG		 4997 ieee80211_report_disconnect(sdata, frame_buf,
4998 sizeof(frame_buf), true,
4999 req->reason_code);
86552017 5000
c9c3a060 5001 return 0;
8c7d857c
EG		 5002 }
5003
86552017
JB		 5004 if (ifmgd->associated &&
5005 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
c9c3a060
JB		 5006 sdata_info(sdata,
5007 "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
5008 req->bssid, req->reason_code,
5009 ieee80211_get_reason_code_string(req->reason_code));
5010
86552017
JB		 5011 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5012 req->reason_code, tx, frame_buf);
a90faa9d
EG		 5013 ieee80211_report_disconnect(sdata, frame_buf,
5014 sizeof(frame_buf), true,
5015 req->reason_code);
c9c3a060
JB		 5016 return 0;
5017 }
86552017 5018
c9c3a060 5019 return -ENOTCONN;
f0706e82 5020}
84363e6e 5021
77fdaa12 5022int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 5023 struct cfg80211_disassoc_request *req)
9c6bd790 5024{
77fdaa12 5025 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 5026 u8 bssid[ETH_ALEN];
6ae16775 5027 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
9c6bd790 5028
8d8b261a
JB		 5029 /*
5030 * cfg80211 should catch this ... but it's racy since
5031 * we can receive a disassoc frame, process it, hand it
5032 * to cfg80211 while that's in a locked section already
5033 * trying to tell us that the user wants to disconnect.
5034 */
8d61ffa5 5035 if (ifmgd->associated != req->bss)
77fdaa12 5036 return -ENOLINK;
77fdaa12 5037
bdcbd8e0 5038 sdata_info(sdata,
dfa1ad29
CO		 5039 "disassociating from %pM by local choice (Reason: %u=%s)\n",
5040 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
0ff71613 5041
e69e95db 5042 memcpy(bssid, req->bss->bssid, ETH_ALEN);
37ad3888
JB		 5043 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
5044 req->reason_code, !req->local_state_change,
5045 frame_buf);
10f644a4 5046
a90faa9d
EG		 5047 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
5048 req->reason_code);
bc83b681 5049
10f644a4
JB		 5050 return 0;
5051}
026331c4 5052
afa762f6 5053void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
54e4ffb2
JB		 5054{
5055 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5056
49921859
BG		 5057 /*
5058 * Make sure some work items will not run after this,
5059 * they will not do anything but might not have been
5060 * cancelled when disconnecting.
5061 */
5062 cancel_work_sync(&ifmgd->monitor_work);
5063 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5064 cancel_work_sync(&ifmgd->request_smps_work);
5065 cancel_work_sync(&ifmgd->csa_connection_drop_work);
5066 cancel_work_sync(&ifmgd->chswitch_work);
81dd2b88 5067 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
49921859 5068
8d61ffa5 5069 sdata_lock(sdata);
959867fa
JB		 5070 if (ifmgd->assoc_data) {
5071 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
54e4ffb2 5072 ieee80211_destroy_assoc_data(sdata, false);
959867fa
JB		 5073 cfg80211_assoc_timeout(sdata->dev, bss);
5074 }
54e4ffb2
JB		 5075 if (ifmgd->auth_data)
5076 ieee80211_destroy_auth_data(sdata, false);
1277b4a9
LK		 5077 spin_lock_bh(&ifmgd->teardown_lock);
5078 if (ifmgd->teardown_skb) {
5079 kfree_skb(ifmgd->teardown_skb);
5080 ifmgd->teardown_skb = NULL;
5081 ifmgd->orig_teardown_skb = NULL;
5082 }
5083 spin_unlock_bh(&ifmgd->teardown_lock);
54e4ffb2 5084 del_timer_sync(&ifmgd->timer);
8d61ffa5 5085 sdata_unlock(sdata);
54e4ffb2
JB		 5086}
5087
a97c13c3
JO		 5088void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
5089 enum nl80211_cqm_rssi_threshold_event rssi_event,
5090 gfp_t gfp)
5091{
5092 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5093
b5878a2d
JB		 5094 trace_api_cqm_rssi_notify(sdata, rssi_event);
5095
a97c13c3
JO		 5096 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
5097}
5098EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
98f03342
JB		 5099
5100void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
5101{
5102 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5103
5104 trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
5105
5106 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
5107}
5108EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);
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