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mac80211: make enable_qos parameter to ieee80211_set_wmm_default()
[mirror_ubuntu-bionic-kernel.git] / net / mac80211 / mlme.c
CommitLineData
f0706e82
JB		 1/*
2 * BSS client mode implementation
5394af4d 3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
f0706e82
JB		 4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
d98ad83e 8 * Copyright 2013-2014 Intel Mobile Communications GmbH
322cd406 9 * Copyright (C) 2015 Intel Deutschland GmbH
f0706e82
JB		 10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License version 2 as
13 * published by the Free Software Foundation.
14 */
15
5b323edb 16#include <linux/delay.h>
f0706e82
JB		 17#include <linux/if_ether.h>
18#include <linux/skbuff.h>
f0706e82 19#include <linux/if_arp.h>
f0706e82 20#include <linux/etherdevice.h>
d9b93842 21#include <linux/moduleparam.h>
d0709a65 22#include <linux/rtnetlink.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
391a200a
JM		 83/*
84 * How many Beacon frames need to have been used in average signal strength
85 * before starting to indicate signal change events.
86 */
87#define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
88
ca386f31
JB		 89/*
90 * We can have multiple work items (and connection probing)
91 * scheduling this timer, but we need to take care to only
92 * reschedule it when it should fire _earlier_ than it was
93 * asked for before, or if it's not pending right now. This
94 * function ensures that. Note that it then is required to
95 * run this function for all timeouts after the first one
96 * has happened -- the work that runs from this timer will
97 * do that.
98 */
8d61ffa5
JB		 99static void run_again(struct ieee80211_sub_if_data *sdata,
100 unsigned long timeout)
ca386f31 101{
8d61ffa5 102 sdata_assert_lock(sdata);
ca386f31 103
8d61ffa5
JB		 104 if (!timer_pending(&sdata->u.mgd.timer) ||
105 time_before(timeout, sdata->u.mgd.timer.expires))
106 mod_timer(&sdata->u.mgd.timer, timeout);
ca386f31
JB		 107}
108
d3a910a8 109void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
b291ba11 110{
c1288b12 111 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
b291ba11
JB		 112 return;
113
30686bf7 114 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
7eeff74c
JB		 115 return;
116
b291ba11 117 mod_timer(&sdata->u.mgd.bcn_mon_timer,
7ccc8bd7 118 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
b291ba11
JB		 119}
120
be099e82
LR		 121void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
122{
0c699c3a
LR		 123 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
124
8628172f
SG		 125 if (unlikely(!sdata->u.mgd.associated))
126 return;
127
448cd2e2
EP		 128 ifmgd->probe_send_count = 0;
129
30686bf7 130 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
be099e82
LR		 131 return;
132
133 mod_timer(&sdata->u.mgd.conn_mon_timer,
134 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
135}
136
5484e237 137static int ecw2cw(int ecw)
60f8b39c 138{
5484e237 139 return (1 << ecw) - 1;
60f8b39c
JB		 140}
141
6565ec9b
JB		 142static u32
143ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
144 struct ieee80211_supported_band *sband,
145 struct ieee80211_channel *channel,
53b954ee 146 const struct ieee80211_ht_cap *ht_cap,
6565ec9b
JB		 147 const struct ieee80211_ht_operation *ht_oper,
148 const struct ieee80211_vht_operation *vht_oper,
5cdaed1e 149 struct cfg80211_chan_def *chandef, bool tracking)
6565ec9b 150{
5cdaed1e 151 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6565ec9b 152 struct cfg80211_chan_def vht_chandef;
179b8fc7 153 struct ieee80211_sta_ht_cap sta_ht_cap;
6565ec9b
JB		 154 u32 ht_cfreq, ret;
155
179b8fc7
CRI		 156 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
157 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
158
6565ec9b
JB		 159 chandef->chan = channel;
160 chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
161 chandef->center_freq1 = channel->center_freq;
162 chandef->center_freq2 = 0;
163
179b8fc7 164 if (!ht_cap || !ht_oper || !sta_ht_cap.ht_supported) {
6565ec9b
JB		 165 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
166 goto out;
167 }
168
169 chandef->width = NL80211_CHAN_WIDTH_20;
170
53b954ee
EP		 171 if (!(ht_cap->cap_info &
172 cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40))) {
f3000e1b 173 ret = IEEE80211_STA_DISABLE_40MHZ;
7e6225a1 174 vht_chandef = *chandef;
53b954ee
EP		 175 goto out;
176 }
177
6565ec9b
JB		 178 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
179 channel->band);
180 /* check that channel matches the right operating channel */
5cdaed1e 181 if (!tracking && channel->center_freq != ht_cfreq) {
6565ec9b
JB		 182 /*
183 * It's possible that some APs are confused here;
184 * Netgear WNDR3700 sometimes reports 4 higher than
185 * the actual channel in association responses, but
186 * since we look at probe response/beacon data here
187 * it should be OK.
188 */
5cdaed1e
JB		 189 sdata_info(sdata,
190 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
191 channel->center_freq, ht_cfreq,
192 ht_oper->primary_chan, channel->band);
6565ec9b
JB		 193 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
194 goto out;
195 }
196
197 /* check 40 MHz support, if we have it */
179b8fc7 198 if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
6565ec9b
JB		 199 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
200 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
201 chandef->width = NL80211_CHAN_WIDTH_40;
202 chandef->center_freq1 += 10;
203 break;
204 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
205 chandef->width = NL80211_CHAN_WIDTH_40;
206 chandef->center_freq1 -= 10;
207 break;
208 }
209 } else {
210 /* 40 MHz (and 80 MHz) must be supported for VHT */
211 ret = IEEE80211_STA_DISABLE_VHT;
85220d71
JB		 212 /* also mark 40 MHz disabled */
213 ret |= IEEE80211_STA_DISABLE_40MHZ;
6565ec9b
JB		 214 goto out;
215 }
216
217 if (!vht_oper || !sband->vht_cap.vht_supported) {
218 ret = IEEE80211_STA_DISABLE_VHT;
219 goto out;
220 }
221
222 vht_chandef.chan = channel;
223 vht_chandef.center_freq1 =
224 ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx,
225 channel->band);
226 vht_chandef.center_freq2 = 0;
227
6565ec9b
JB		 228 switch (vht_oper->chan_width) {
229 case IEEE80211_VHT_CHANWIDTH_USE_HT:
230 vht_chandef.width = chandef->width;
cb664981 231 vht_chandef.center_freq1 = chandef->center_freq1;
6565ec9b
JB		 232 break;
233 case IEEE80211_VHT_CHANWIDTH_80MHZ:
234 vht_chandef.width = NL80211_CHAN_WIDTH_80;
235 break;
236 case IEEE80211_VHT_CHANWIDTH_160MHZ:
237 vht_chandef.width = NL80211_CHAN_WIDTH_160;
238 break;
239 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
240 vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
6553bf04
JB		 241 vht_chandef.center_freq2 =
242 ieee80211_channel_to_frequency(
243 vht_oper->center_freq_seg2_idx,
244 channel->band);
6565ec9b
JB		 245 break;
246 default:
5cdaed1e 247 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
30eb1dc2
JB		 248 sdata_info(sdata,
249 "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
250 vht_oper->chan_width);
6565ec9b
JB		 251 ret = IEEE80211_STA_DISABLE_VHT;
252 goto out;
253 }
254
255 if (!cfg80211_chandef_valid(&vht_chandef)) {
5cdaed1e 256 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
30eb1dc2
JB		 257 sdata_info(sdata,
258 "AP VHT information is invalid, disable VHT\n");
6565ec9b
JB		 259 ret = IEEE80211_STA_DISABLE_VHT;
260 goto out;
261 }
262
263 if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
264 ret = 0;
265 goto out;
266 }
267
268 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
5cdaed1e 269 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
30eb1dc2
JB		 270 sdata_info(sdata,
271 "AP VHT information doesn't match HT, disable VHT\n");
6565ec9b
JB		 272 ret = IEEE80211_STA_DISABLE_VHT;
273 goto out;
274 }
275
276 *chandef = vht_chandef;
277
278 ret = 0;
279
280out:
963a1852
JB		 281 /*
282 * When tracking the current AP, don't do any further checks if the
283 * new chandef is identical to the one we're currently using for the
284 * connection. This keeps us from playing ping-pong with regulatory,
285 * without it the following can happen (for example):
286 * - connect to an AP with 80 MHz, world regdom allows 80 MHz
287 * - AP advertises regdom US
288 * - CRDA loads regdom US with 80 MHz prohibited (old database)
289 * - the code below detects an unsupported channel, downgrades, and
290 * we disconnect from the AP in the caller
291 * - disconnect causes CRDA to reload world regdomain and the game
292 * starts anew.
293 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
294 *
295 * It seems possible that there are still scenarios with CSA or real
296 * bandwidth changes where a this could happen, but those cases are
297 * less common and wouldn't completely prevent using the AP.
298 */
299 if (tracking &&
300 cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef))
301 return ret;
302
586e01ed
JB		 303 /* don't print the message below for VHT mismatch if VHT is disabled */
304 if (ret & IEEE80211_STA_DISABLE_VHT)
305 vht_chandef = *chandef;
306
ddfe49b4
JB		 307 /*
308 * Ignore the DISABLED flag when we're already connected and only
309 * tracking the APs beacon for bandwidth changes - otherwise we
310 * might get disconnected here if we connect to an AP, update our
311 * regulatory information based on the AP's country IE and the
312 * information we have is wrong/outdated and disables the channel
313 * that we're actually using for the connection to the AP.
314 */
6565ec9b 315 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
ddfe49b4
JB		 316 tracking ? 0 :
317 IEEE80211_CHAN_DISABLED)) {
6565ec9b
JB		 318 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
319 ret = IEEE80211_STA_DISABLE_HT |
320 IEEE80211_STA_DISABLE_VHT;
b56e4b85 321 break;
6565ec9b
JB		 322 }
323
e6b7cde4 324 ret |= ieee80211_chandef_downgrade(chandef);
6565ec9b
JB		 325 }
326
5cdaed1e 327 if (chandef->width != vht_chandef.width && !tracking)
6565ec9b
JB		 328 sdata_info(sdata,
329 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
330
331 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
332 return ret;
333}
334
30eb1dc2
JB		 335static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
336 struct sta_info *sta,
53b954ee 337 const struct ieee80211_ht_cap *ht_cap,
30eb1dc2
JB		 338 const struct ieee80211_ht_operation *ht_oper,
339 const struct ieee80211_vht_operation *vht_oper,
340 const u8 *bssid, u32 *changed)
d5522e03
JB		 341{
342 struct ieee80211_local *local = sdata->local;
30eb1dc2 343 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d5522e03 344 struct ieee80211_supported_band *sband;
55de908a 345 struct ieee80211_channel *chan;
30eb1dc2 346 struct cfg80211_chan_def chandef;
9ed6bcce 347 u16 ht_opmode;
30eb1dc2
JB		 348 u32 flags;
349 enum ieee80211_sta_rx_bandwidth new_sta_bw;
350 int ret;
d5522e03 351
30eb1dc2
JB		 352 /* if HT was/is disabled, don't track any bandwidth changes */
353 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
1128958d
JB		 354 return 0;
355
30eb1dc2
JB		 356 /* don't check VHT if we associated as non-VHT station */
357 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
358 vht_oper = NULL;
359
360 if (WARN_ON_ONCE(!sta))
361 return -EINVAL;
362
017b45bb
AA		 363 /*
364 * if bss configuration changed store the new one -
365 * this may be applicable even if channel is identical
366 */
367 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
368 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
369 *changed |= BSS_CHANGED_HT;
370 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
371 }
372
f2d9330e 373 chan = sdata->vif.bss_conf.chandef.chan;
55de908a 374 sband = local->hw.wiphy->bands[chan->band];
d5522e03 375
30eb1dc2 376 /* calculate new channel (type) based on HT/VHT operation IEs */
53b954ee
EP		 377 flags = ieee80211_determine_chantype(sdata, sband, chan,
378 ht_cap, ht_oper, vht_oper,
379 &chandef, true);
30eb1dc2
JB		 380
381 /*
382 * Downgrade the new channel if we associated with restricted
383 * capabilities. For example, if we associated as a 20 MHz STA
384 * to a 40 MHz AP (due to regulatory, capabilities or config
385 * reasons) then switching to a 40 MHz channel now won't do us
386 * any good -- we couldn't use it with the AP.
387 */
388 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
389 chandef.width == NL80211_CHAN_WIDTH_80P80)
e6b7cde4 390 flags |= ieee80211_chandef_downgrade(&chandef);
30eb1dc2
JB		 391 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
392 chandef.width == NL80211_CHAN_WIDTH_160)
e6b7cde4 393 flags |= ieee80211_chandef_downgrade(&chandef);
30eb1dc2
JB		 394 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
395 chandef.width > NL80211_CHAN_WIDTH_20)
e6b7cde4 396 flags |= ieee80211_chandef_downgrade(&chandef);
30eb1dc2
JB		 397
398 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
399 return 0;
400
401 sdata_info(sdata,
402 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
403 ifmgd->bssid, chandef.chan->center_freq, chandef.width,
404 chandef.center_freq1, chandef.center_freq2);
405
406 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
407 IEEE80211_STA_DISABLE_VHT |
408 IEEE80211_STA_DISABLE_40MHZ |
409 IEEE80211_STA_DISABLE_80P80MHZ |
410 IEEE80211_STA_DISABLE_160MHZ)) ||
411 !cfg80211_chandef_valid(&chandef)) {
412 sdata_info(sdata,
413 "AP %pM changed bandwidth in a way we can't support - disconnect\n",
414 ifmgd->bssid);
415 return -EINVAL;
416 }
417
418 switch (chandef.width) {
419 case NL80211_CHAN_WIDTH_20_NOHT:
420 case NL80211_CHAN_WIDTH_20:
421 new_sta_bw = IEEE80211_STA_RX_BW_20;
422 break;
4bf88530 423 case NL80211_CHAN_WIDTH_40:
30eb1dc2 424 new_sta_bw = IEEE80211_STA_RX_BW_40;
64f68e5d 425 break;
30eb1dc2
JB		 426 case NL80211_CHAN_WIDTH_80:
427 new_sta_bw = IEEE80211_STA_RX_BW_80;
428 break;
429 case NL80211_CHAN_WIDTH_80P80:
430 case NL80211_CHAN_WIDTH_160:
431 new_sta_bw = IEEE80211_STA_RX_BW_160;
64f68e5d 432 break;
30eb1dc2
JB		 433 default:
434 return -EINVAL;
64f68e5d 435 }
d5522e03 436
30eb1dc2
JB		 437 if (new_sta_bw > sta->cur_max_bandwidth)
438 new_sta_bw = sta->cur_max_bandwidth;
64f68e5d 439
30eb1dc2
JB		 440 if (new_sta_bw < sta->sta.bandwidth) {
441 sta->sta.bandwidth = new_sta_bw;
442 rate_control_rate_update(local, sband, sta,
443 IEEE80211_RC_BW_CHANGED);
444 }
64f68e5d 445
30eb1dc2
JB		 446 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
447 if (ret) {
448 sdata_info(sdata,
449 "AP %pM changed bandwidth to incompatible one - disconnect\n",
450 ifmgd->bssid);
451 return ret;
452 }
7cc44ed4 453
30eb1dc2
JB		 454 if (new_sta_bw > sta->sta.bandwidth) {
455 sta->sta.bandwidth = new_sta_bw;
456 rate_control_rate_update(local, sband, sta,
457 IEEE80211_RC_BW_CHANGED);
0aaffa9b 458 }
d5522e03 459
30eb1dc2 460 return 0;
d5522e03
JB		 461}
462
9c6bd790
JB		 463/* frame sending functions */
464
66e67e41 465static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
9dde6423 466 struct sk_buff *skb, u8 ap_ht_param,
66e67e41
JB		 467 struct ieee80211_supported_band *sband,
468 struct ieee80211_channel *channel,
469 enum ieee80211_smps_mode smps)
470{
66e67e41
JB		 471 u8 *pos;
472 u32 flags = channel->flags;
473 u16 cap;
474 struct ieee80211_sta_ht_cap ht_cap;
475
476 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
477
66e67e41
JB		 478 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
479 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
480
66e67e41
JB		 481 /* determine capability flags */
482 cap = ht_cap.cap;
483
9dde6423 484 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
66e67e41
JB		 485 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
486 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
487 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
488 cap &= ~IEEE80211_HT_CAP_SGI_40;
489 }
490 break;
491 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
492 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
493 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
494 cap &= ~IEEE80211_HT_CAP_SGI_40;
495 }
496 break;
497 }
498
24398e39
JB		 499 /*
500 * If 40 MHz was disabled associate as though we weren't
501 * capable of 40 MHz -- some broken APs will never fall
502 * back to trying to transmit in 20 MHz.
503 */
504 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
505 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
506 cap &= ~IEEE80211_HT_CAP_SGI_40;
507 }
508
66e67e41
JB		 509 /* set SM PS mode properly */
510 cap &= ~IEEE80211_HT_CAP_SM_PS;
511 switch (smps) {
512 case IEEE80211_SMPS_AUTOMATIC:
513 case IEEE80211_SMPS_NUM_MODES:
514 WARN_ON(1);
515 case IEEE80211_SMPS_OFF:
516 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
517 IEEE80211_HT_CAP_SM_PS_SHIFT;
518 break;
519 case IEEE80211_SMPS_STATIC:
520 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
521 IEEE80211_HT_CAP_SM_PS_SHIFT;
522 break;
523 case IEEE80211_SMPS_DYNAMIC:
524 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
525 IEEE80211_HT_CAP_SM_PS_SHIFT;
526 break;
527 }
528
529 /* reserve and fill IE */
530 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
531 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
532}
533
322cd406
SS		 534/* This function determines vht capability flags for the association
535 * and builds the IE.
536 * Note - the function may set the owner of the MU-MIMO capability
537 */
d545daba
MP		 538static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
539 struct sk_buff *skb,
b08fbbd8
JB		 540 struct ieee80211_supported_band *sband,
541 struct ieee80211_vht_cap *ap_vht_cap)
d545daba 542{
322cd406 543 struct ieee80211_local *local = sdata->local;
d545daba
MP		 544 u8 *pos;
545 u32 cap;
546 struct ieee80211_sta_vht_cap vht_cap;
c1cf6d4e 547 u32 mask, ap_bf_sts, our_bf_sts;
d545daba
MP		 548
549 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
550
551 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
dd5ecfea 552 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
d545daba
MP		 553
554 /* determine capability flags */
555 cap = vht_cap.cap;
556
f2d9d270 557 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
575f0530
JB		 558 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
559
560 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
561 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ ||
562 bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
563 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
f2d9d270
JB		 564 }
565
566 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
567 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
575f0530 568 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
f2d9d270
JB		 569 }
570
b08fbbd8
JB		 571 /*
572 * Some APs apparently get confused if our capabilities are better
573 * than theirs, so restrict what we advertise in the assoc request.
574 */
575 if (!(ap_vht_cap->vht_cap_info &
576 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
322cd406
SS		 577 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
578 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE);
579 else if (!(ap_vht_cap->vht_cap_info &
580 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE)))
581 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
582
583 /*
584 * If some other vif is using the MU-MIMO capablity we cannot associate
585 * using MU-MIMO - this will lead to contradictions in the group-id
586 * mechanism.
587 * Ownership is defined since association request, in order to avoid
588 * simultaneous associations with MU-MIMO.
589 */
590 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) {
591 bool disable_mu_mimo = false;
592 struct ieee80211_sub_if_data *other;
593
594 list_for_each_entry_rcu(other, &local->interfaces, list) {
595 if (other->flags & IEEE80211_SDATA_MU_MIMO_OWNER) {
596 disable_mu_mimo = true;
597 break;
598 }
599 }
600 if (disable_mu_mimo)
601 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
602 else
603 sdata->flags |= IEEE80211_SDATA_MU_MIMO_OWNER;
604 }
b08fbbd8 605
c1cf6d4e
ES		 606 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK;
607
608 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask;
609 our_bf_sts = cap & mask;
610
611 if (ap_bf_sts < our_bf_sts) {
612 cap &= ~mask;
613 cap |= ap_bf_sts;
614 }
615
d545daba 616 /* reserve and fill IE */
d4950281 617 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
d545daba
MP		 618 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
619}
620
66e67e41
JB		 621static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
622{
623 struct ieee80211_local *local = sdata->local;
624 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
625 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
626 struct sk_buff *skb;
627 struct ieee80211_mgmt *mgmt;
628 u8 *pos, qos_info;
629 size_t offset = 0, noffset;
2103dec1 630 int i, count, rates_len, supp_rates_len, shift;
66e67e41
JB		 631 u16 capab;
632 struct ieee80211_supported_band *sband;
55de908a
JB		 633 struct ieee80211_chanctx_conf *chanctx_conf;
634 struct ieee80211_channel *chan;
2103dec1 635 u32 rate_flags, rates = 0;
66e67e41 636
8d61ffa5 637 sdata_assert_lock(sdata);
66e67e41 638
55de908a
JB		 639 rcu_read_lock();
640 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
641 if (WARN_ON(!chanctx_conf)) {
642 rcu_read_unlock();
643 return;
644 }
4bf88530 645 chan = chanctx_conf->def.chan;
2103dec1 646 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
55de908a
JB		 647 rcu_read_unlock();
648 sband = local->hw.wiphy->bands[chan->band];
2103dec1 649 shift = ieee80211_vif_get_shift(&sdata->vif);
66e67e41
JB		 650
651 if (assoc_data->supp_rates_len) {
652 /*
653 * Get all rates supported by the device and the AP as
654 * some APs don't like getting a superset of their rates
655 * in the association request (e.g. D-Link DAP 1353 in
656 * b-only mode)...
657 */
2103dec1
SW		 658 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
659 assoc_data->supp_rates,
660 assoc_data->supp_rates_len,
661 &rates);
66e67e41
JB		 662 } else {
663 /*
664 * In case AP not provide any supported rates information
665 * before association, we send information element(s) with
666 * all rates that we support.
667 */
2103dec1
SW		 668 rates_len = 0;
669 for (i = 0; i < sband->n_bitrates; i++) {
670 if ((rate_flags & sband->bitrates[i].flags)
671 != rate_flags)
672 continue;
673 rates |= BIT(i);
674 rates_len++;
675 }
66e67e41
JB		 676 }
677
678 skb = alloc_skb(local->hw.extra_tx_headroom +
679 sizeof(*mgmt) + /* bit too much but doesn't matter */
680 2 + assoc_data->ssid_len + /* SSID */
681 4 + rates_len + /* (extended) rates */
682 4 + /* power capability */
683 2 + 2 * sband->n_channels + /* supported channels */
684 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
d4950281 685 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
66e67e41
JB		 686 assoc_data->ie_len + /* extra IEs */
687 9, /* WMM */
688 GFP_KERNEL);
689 if (!skb)
690 return;
691
692 skb_reserve(skb, local->hw.extra_tx_headroom);
693
694 capab = WLAN_CAPABILITY_ESS;
695
696 if (sband->band == IEEE80211_BAND_2GHZ) {
ea1b2b45
JB		 697 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
698 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
66e67e41
JB		 699 }
700
701 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
702 capab |= WLAN_CAPABILITY_PRIVACY;
703
704 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
30686bf7 705 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT))
66e67e41
JB		 706 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
707
cd2f5dd7
AK		 708 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM)
709 capab |= WLAN_CAPABILITY_RADIO_MEASURE;
710
66e67e41
JB		 711 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
712 memset(mgmt, 0, 24);
713 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
714 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
715 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
716
717 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
718 skb_put(skb, 10);
719 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
720 IEEE80211_STYPE_REASSOC_REQ);
721 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
722 mgmt->u.reassoc_req.listen_interval =
723 cpu_to_le16(local->hw.conf.listen_interval);
724 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
725 ETH_ALEN);
726 } else {
727 skb_put(skb, 4);
728 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
729 IEEE80211_STYPE_ASSOC_REQ);
730 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
731 mgmt->u.assoc_req.listen_interval =
732 cpu_to_le16(local->hw.conf.listen_interval);
733 }
734
735 /* SSID */
736 pos = skb_put(skb, 2 + assoc_data->ssid_len);
737 *pos++ = WLAN_EID_SSID;
738 *pos++ = assoc_data->ssid_len;
739 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
740
741 /* add all rates which were marked to be used above */
742 supp_rates_len = rates_len;
743 if (supp_rates_len > 8)
744 supp_rates_len = 8;
745
746 pos = skb_put(skb, supp_rates_len + 2);
747 *pos++ = WLAN_EID_SUPP_RATES;
748 *pos++ = supp_rates_len;
749
750 count = 0;
751 for (i = 0; i < sband->n_bitrates; i++) {
752 if (BIT(i) & rates) {
2103dec1
SW		 753 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
754 5 * (1 << shift));
755 *pos++ = (u8) rate;
66e67e41
JB		 756 if (++count == 8)
757 break;
758 }
759 }
760
761 if (rates_len > count) {
762 pos = skb_put(skb, rates_len - count + 2);
763 *pos++ = WLAN_EID_EXT_SUPP_RATES;
764 *pos++ = rates_len - count;
765
766 for (i++; i < sband->n_bitrates; i++) {
767 if (BIT(i) & rates) {
2103dec1
SW		 768 int rate;
769 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
770 5 * (1 << shift));
771 *pos++ = (u8) rate;
66e67e41
JB		 772 }
773 }
774 }
775
cd2f5dd7
AK		 776 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT ||
777 capab & WLAN_CAPABILITY_RADIO_MEASURE) {
66e67e41
JB		 778 pos = skb_put(skb, 4);
779 *pos++ = WLAN_EID_PWR_CAPABILITY;
780 *pos++ = 2;
781 *pos++ = 0; /* min tx power */
0430c883
SW		 782 /* max tx power */
783 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
cd2f5dd7 784 }
66e67e41 785
cd2f5dd7 786 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
66e67e41
JB		 787 /* TODO: get this in reg domain format */
788 pos = skb_put(skb, 2 * sband->n_channels + 2);
789 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
790 *pos++ = 2 * sband->n_channels;
791 for (i = 0; i < sband->n_channels; i++) {
792 *pos++ = ieee80211_frequency_to_channel(
793 sband->channels[i].center_freq);
794 *pos++ = 1; /* one channel in the subband*/
795 }
796 }
797
798 /* if present, add any custom IEs that go before HT */
b3f51e94 799 if (assoc_data->ie_len) {
66e67e41
JB		 800 static const u8 before_ht[] = {
801 WLAN_EID_SSID,
802 WLAN_EID_SUPP_RATES,
803 WLAN_EID_EXT_SUPP_RATES,
804 WLAN_EID_PWR_CAPABILITY,
805 WLAN_EID_SUPPORTED_CHANNELS,
806 WLAN_EID_RSN,
807 WLAN_EID_QOS_CAPA,
808 WLAN_EID_RRM_ENABLED_CAPABILITIES,
809 WLAN_EID_MOBILITY_DOMAIN,
8ed28747
JB		 810 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */
811 WLAN_EID_RIC_DATA, /* reassoc only */
66e67e41
JB		 812 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
813 };
8ed28747
JB		 814 static const u8 after_ric[] = {
815 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
816 WLAN_EID_HT_CAPABILITY,
817 WLAN_EID_BSS_COEX_2040,
818 WLAN_EID_EXT_CAPABILITY,
819 WLAN_EID_QOS_TRAFFIC_CAPA,
820 WLAN_EID_TIM_BCAST_REQ,
821 WLAN_EID_INTERWORKING,
822 /* 60GHz doesn't happen right now */
823 WLAN_EID_VHT_CAPABILITY,
824 WLAN_EID_OPMODE_NOTIF,
825 };
826
827 noffset = ieee80211_ie_split_ric(assoc_data->ie,
828 assoc_data->ie_len,
829 before_ht,
830 ARRAY_SIZE(before_ht),
831 after_ric,
832 ARRAY_SIZE(after_ric),
833 offset);
66e67e41
JB		 834 pos = skb_put(skb, noffset - offset);
835 memcpy(pos, assoc_data->ie + offset, noffset - offset);
836 offset = noffset;
837 }
838
f2d9d270
JB		 839 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
840 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
841 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
842
a8243b72 843 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
9dde6423 844 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
04ecd257 845 sband, chan, sdata->smps_mode);
66e67e41 846
3de3802c
JB		 847 /* if present, add any custom IEs that go before VHT */
848 if (assoc_data->ie_len) {
849 static const u8 before_vht[] = {
850 WLAN_EID_SSID,
851 WLAN_EID_SUPP_RATES,
852 WLAN_EID_EXT_SUPP_RATES,
853 WLAN_EID_PWR_CAPABILITY,
854 WLAN_EID_SUPPORTED_CHANNELS,
855 WLAN_EID_RSN,
856 WLAN_EID_QOS_CAPA,
857 WLAN_EID_RRM_ENABLED_CAPABILITIES,
858 WLAN_EID_MOBILITY_DOMAIN,
859 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
860 WLAN_EID_HT_CAPABILITY,
861 WLAN_EID_BSS_COEX_2040,
862 WLAN_EID_EXT_CAPABILITY,
863 WLAN_EID_QOS_TRAFFIC_CAPA,
864 WLAN_EID_TIM_BCAST_REQ,
865 WLAN_EID_INTERWORKING,
866 };
8ed28747
JB		 867
868 /* RIC already taken above, so no need to handle here anymore */
3de3802c
JB		 869 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
870 before_vht, ARRAY_SIZE(before_vht),
871 offset);
872 pos = skb_put(skb, noffset - offset);
873 memcpy(pos, assoc_data->ie + offset, noffset - offset);
874 offset = noffset;
875 }
876
d545daba 877 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
b08fbbd8
JB		 878 ieee80211_add_vht_ie(sdata, skb, sband,
879 &assoc_data->ap_vht_cap);
d545daba 880
66e67e41 881 /* if present, add any custom non-vendor IEs that go after HT */
b3f51e94 882 if (assoc_data->ie_len) {
66e67e41
JB		 883 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
884 assoc_data->ie_len,
885 offset);
886 pos = skb_put(skb, noffset - offset);
887 memcpy(pos, assoc_data->ie + offset, noffset - offset);
888 offset = noffset;
889 }
890
76f0303d
JB		 891 if (assoc_data->wmm) {
892 if (assoc_data->uapsd) {
dc41e4d4
EP		 893 qos_info = ifmgd->uapsd_queues;
894 qos_info |= (ifmgd->uapsd_max_sp_len <<
66e67e41
JB		 895 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
896 } else {
897 qos_info = 0;
898 }
899
40b861a0 900 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
66e67e41
JB		 901 }
902
903 /* add any remaining custom (i.e. vendor specific here) IEs */
b3f51e94 904 if (assoc_data->ie_len) {
66e67e41
JB		 905 noffset = assoc_data->ie_len;
906 pos = skb_put(skb, noffset - offset);
907 memcpy(pos, assoc_data->ie + offset, noffset - offset);
908 }
909
a1845fc7
JB		 910 drv_mgd_prepare_tx(local, sdata);
911
66e67e41 912 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
30686bf7 913 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1672c0e3
JB		 914 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
915 IEEE80211_TX_INTFL_MLME_CONN_TX;
66e67e41
JB		 916 ieee80211_tx_skb(sdata, skb);
917}
918
572e0012
KV		 919void ieee80211_send_pspoll(struct ieee80211_local *local,
920 struct ieee80211_sub_if_data *sdata)
921{
572e0012
KV		 922 struct ieee80211_pspoll *pspoll;
923 struct sk_buff *skb;
572e0012 924
d8cd189e
KV		 925 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
926 if (!skb)
572e0012 927 return;
572e0012 928
d8cd189e
KV		 929 pspoll = (struct ieee80211_pspoll *) skb->data;
930 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
572e0012 931
62ae67be
JB		 932 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
933 ieee80211_tx_skb(sdata, skb);
572e0012
KV		 934}
935
965bedad
JB		 936void ieee80211_send_nullfunc(struct ieee80211_local *local,
937 struct ieee80211_sub_if_data *sdata,
076cdcb1 938 bool powersave)
965bedad
JB		 939{
940 struct sk_buff *skb;
d8cd189e 941 struct ieee80211_hdr_3addr *nullfunc;
b6f35301 942 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
965bedad 943
d8cd189e
KV		 944 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
945 if (!skb)
965bedad 946 return;
965bedad 947
d8cd189e 948 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
965bedad 949 if (powersave)
d8cd189e 950 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
965bedad 951
6c17b77b
SF		 952 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
953 IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
ff40b425 954
30686bf7 955 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
ff40b425
PF		 956 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
957
392b9ffb 958 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
b6f35301
RM		 959 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
960
62ae67be 961 ieee80211_tx_skb(sdata, skb);
965bedad
JB		 962}
963
d524215f
FF		 964static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
965 struct ieee80211_sub_if_data *sdata)
966{
967 struct sk_buff *skb;
968 struct ieee80211_hdr *nullfunc;
969 __le16 fc;
970
971 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
972 return;
973
974 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
d15b8459 975 if (!skb)
d524215f 976 return;
d15b8459 977
d524215f
FF		 978 skb_reserve(skb, local->hw.extra_tx_headroom);
979
980 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
981 memset(nullfunc, 0, 30);
982 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
983 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
984 nullfunc->frame_control = fc;
985 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
986 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
987 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
988 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
989
990 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
991 ieee80211_tx_skb(sdata, skb);
992}
993
cc32abd4
JB		 994/* spectrum management related things */
995static void ieee80211_chswitch_work(struct work_struct *work)
996{
997 struct ieee80211_sub_if_data *sdata =
998 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
675a0b04 999 struct ieee80211_local *local = sdata->local;
cc32abd4 1000 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
7578d575 1001 int ret;
cc32abd4 1002
9607e6b6 1003 if (!ieee80211_sdata_running(sdata))
cc32abd4
JB		 1004 return;
1005
8d61ffa5 1006 sdata_lock(sdata);
4c3ebc56
MK		 1007 mutex_lock(&local->mtx);
1008 mutex_lock(&local->chanctx_mtx);
1009
77fdaa12
JB		 1010 if (!ifmgd->associated)
1011 goto out;
cc32abd4 1012
4c3ebc56
MK		 1013 if (!sdata->vif.csa_active)
1014 goto out;
1015
1016 /*
1017 * using reservation isn't immediate as it may be deferred until later
1018 * with multi-vif. once reservation is complete it will re-schedule the
1019 * work with no reserved_chanctx so verify chandef to check if it
1020 * completed successfully
1021 */
1022
1023 if (sdata->reserved_chanctx) {
1024 /*
1025 * with multi-vif csa driver may call ieee80211_csa_finish()
1026 * many times while waiting for other interfaces to use their
1027 * reservations
1028 */
1029 if (sdata->reserved_ready)
1030 goto out;
1031
1032 ret = ieee80211_vif_use_reserved_context(sdata);
1033 if (ret) {
1034 sdata_info(sdata,
1035 "failed to use reserved channel context, disconnecting (err=%d)\n",
1036 ret);
1037 ieee80211_queue_work(&sdata->local->hw,
1038 &ifmgd->csa_connection_drop_work);
1039 goto out;
1040 }
1041
1042 goto out;
1043 }
1044
1045 if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
1046 &sdata->csa_chandef)) {
7578d575 1047 sdata_info(sdata,
4c3ebc56 1048 "failed to finalize channel switch, disconnecting\n");
7578d575
AN		 1049 ieee80211_queue_work(&sdata->local->hw,
1050 &ifmgd->csa_connection_drop_work);
1051 goto out;
1052 }
675a0b04 1053
cc32abd4 1054 /* XXX: shouldn't really modify cfg80211-owned data! */
33787fc4 1055 ifmgd->associated->channel = sdata->csa_chandef.chan;
cc32abd4 1056
0c21e632
LC		 1057 ifmgd->csa_waiting_bcn = true;
1058
1059 ieee80211_sta_reset_beacon_monitor(sdata);
1060 ieee80211_sta_reset_conn_monitor(sdata);
1061
1062out:
1063 mutex_unlock(&local->chanctx_mtx);
1064 mutex_unlock(&local->mtx);
1065 sdata_unlock(sdata);
1066}
1067
1068static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata)
1069{
1070 struct ieee80211_local *local = sdata->local;
1071 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1072 int ret;
1073
1074 sdata_assert_lock(sdata);
1075
1076 WARN_ON(!sdata->vif.csa_active);
4c3ebc56 1077
a46992b4
LC		 1078 if (sdata->csa_block_tx) {
1079 ieee80211_wake_vif_queues(local, sdata,
1080 IEEE80211_QUEUE_STOP_REASON_CSA);
1081 sdata->csa_block_tx = false;
1082 }
7578d575 1083
0c21e632
LC		 1084 sdata->vif.csa_active = false;
1085 ifmgd->csa_waiting_bcn = false;
1086
f1d65583
LC		 1087 ret = drv_post_channel_switch(sdata);
1088 if (ret) {
1089 sdata_info(sdata,
1090 "driver post channel switch failed, disconnecting\n");
1091 ieee80211_queue_work(&local->hw,
1092 &ifmgd->csa_connection_drop_work);
0c21e632 1093 return;
f1d65583 1094 }
688b1ecf
LC		 1095
1096 cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef);
cc32abd4
JB		 1097}
1098
5ce6e438
JB		 1099void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1100{
55de908a
JB		 1101 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1102 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5ce6e438
JB		 1103
1104 trace_api_chswitch_done(sdata, success);
1105 if (!success) {
882a7c69
JB		 1106 sdata_info(sdata,
1107 "driver channel switch failed, disconnecting\n");
1108 ieee80211_queue_work(&sdata->local->hw,
1109 &ifmgd->csa_connection_drop_work);
1110 } else {
1111 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
5ce6e438 1112 }
5ce6e438
JB		 1113}
1114EXPORT_SYMBOL(ieee80211_chswitch_done);
1115
cc32abd4
JB		 1116static void ieee80211_chswitch_timer(unsigned long data)
1117{
1118 struct ieee80211_sub_if_data *sdata =
1119 (struct ieee80211_sub_if_data *) data;
5bb644a0 1120
9b7d72c1 1121 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
cc32abd4
JB		 1122}
1123
37799e52 1124static void
4a3cb702 1125ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
2ba45384
LC		 1126 u64 timestamp, u32 device_timestamp,
1127 struct ieee802_11_elems *elems,
04a161f4 1128 bool beacon)
cc32abd4 1129{
b4f286a1 1130 struct ieee80211_local *local = sdata->local;
cc32abd4 1131 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
37799e52 1132 struct cfg80211_bss *cbss = ifmgd->associated;
4c3ebc56 1133 struct ieee80211_chanctx_conf *conf;
55de908a 1134 struct ieee80211_chanctx *chanctx;
e6b7cde4 1135 enum ieee80211_band current_band;
c0f17eb9 1136 struct ieee80211_csa_ie csa_ie;
6d027bcc 1137 struct ieee80211_channel_switch ch_switch;
e6b7cde4 1138 int res;
cc32abd4 1139
8d61ffa5 1140 sdata_assert_lock(sdata);
77fdaa12 1141
37799e52 1142 if (!cbss)
cc32abd4
JB		 1143 return;
1144
b4f286a1 1145 if (local->scanning)
cc32abd4
JB		 1146 return;
1147
37799e52 1148 /* disregard subsequent announcements if we are already processing */
3e2a0226 1149 if (sdata->vif.csa_active)
cc32abd4
JB		 1150 return;
1151
e6b7cde4 1152 current_band = cbss->channel->band;
c0f17eb9 1153 memset(&csa_ie, 0, sizeof(csa_ie));
84469a45 1154 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band,
e6b7cde4 1155 ifmgd->flags,
c0f17eb9 1156 ifmgd->associated->bssid, &csa_ie);
e6b7cde4 1157 if (res < 0)
b4f286a1 1158 ieee80211_queue_work(&local->hw,
882a7c69 1159 &ifmgd->csa_connection_drop_work);
e6b7cde4 1160 if (res)
cc32abd4 1161 return;
cd64f2a9 1162
c0f17eb9 1163 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
85220d71
JB		 1164 IEEE80211_CHAN_DISABLED)) {
1165 sdata_info(sdata,
1166 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
e6b7cde4 1167 ifmgd->associated->bssid,
c0f17eb9
CYY		 1168 csa_ie.chandef.chan->center_freq,
1169 csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1170 csa_ie.chandef.center_freq2);
85220d71
JB		 1171 ieee80211_queue_work(&local->hw,
1172 &ifmgd->csa_connection_drop_work);
1173 return;
1174 }
1175
f84eaa10
JB		 1176 if (cfg80211_chandef_identical(&csa_ie.chandef,
1177 &sdata->vif.bss_conf.chandef)) {
1178 if (ifmgd->csa_ignored_same_chan)
1179 return;
1180 sdata_info(sdata,
1181 "AP %pM tries to chanswitch to same channel, ignore\n",
1182 ifmgd->associated->bssid);
1183 ifmgd->csa_ignored_same_chan = true;
1184 return;
1185 }
1186
c5a71688
AN		 1187 /*
1188 * Drop all TDLS peers - either we disconnect or move to a different
1189 * channel from this point on. There's no telling what our peer will do.
1190 * The TDLS WIDER_BW scenario is also problematic, as peers might now
1191 * have an incompatible wider chandef.
1192 */
1193 ieee80211_teardown_tdls_peers(sdata);
1194
4c3ebc56 1195 mutex_lock(&local->mtx);
7578d575 1196 mutex_lock(&local->chanctx_mtx);
4c3ebc56
MK		 1197 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1198 lockdep_is_held(&local->chanctx_mtx));
1199 if (!conf) {
1200 sdata_info(sdata,
1201 "no channel context assigned to vif?, disconnecting\n");
f3b0bbb3 1202 goto drop_connection;
4c3ebc56
MK		 1203 }
1204
1205 chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1206
0f791eb4 1207 if (local->use_chanctx &&
30686bf7 1208 !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) {
0f791eb4
LC		 1209 sdata_info(sdata,
1210 "driver doesn't support chan-switch with channel contexts\n");
f3b0bbb3 1211 goto drop_connection;
55de908a
JB		 1212 }
1213
6d027bcc
LC		 1214 ch_switch.timestamp = timestamp;
1215 ch_switch.device_timestamp = device_timestamp;
1216 ch_switch.block_tx = csa_ie.mode;
1217 ch_switch.chandef = csa_ie.chandef;
1218 ch_switch.count = csa_ie.count;
1219
1220 if (drv_pre_channel_switch(sdata, &ch_switch)) {
1221 sdata_info(sdata,
1222 "preparing for channel switch failed, disconnecting\n");
f3b0bbb3 1223 goto drop_connection;
6d027bcc
LC		 1224 }
1225
4c3ebc56
MK		 1226 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1227 chanctx->mode, false);
1228 if (res) {
55de908a 1229 sdata_info(sdata,
4c3ebc56
MK		 1230 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1231 res);
f3b0bbb3 1232 goto drop_connection;
55de908a 1233 }
b4f286a1 1234 mutex_unlock(&local->chanctx_mtx);
55de908a 1235
c46a73f3 1236 sdata->vif.csa_active = true;
4c3ebc56 1237 sdata->csa_chandef = csa_ie.chandef;
59af6928 1238 sdata->csa_block_tx = csa_ie.mode;
f84eaa10 1239 ifmgd->csa_ignored_same_chan = false;
55de908a 1240
59af6928 1241 if (sdata->csa_block_tx)
a46992b4
LC		 1242 ieee80211_stop_vif_queues(local, sdata,
1243 IEEE80211_QUEUE_STOP_REASON_CSA);
59af6928 1244 mutex_unlock(&local->mtx);
57eebdf3 1245
2f457293
LC		 1246 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef,
1247 csa_ie.count);
1248
b4f286a1 1249 if (local->ops->channel_switch) {
5ce6e438 1250 /* use driver's channel switch callback */
0f791eb4 1251 drv_channel_switch(local, sdata, &ch_switch);
5ce6e438
JB		 1252 return;
1253 }
1254
1255 /* channel switch handled in software */
c0f17eb9 1256 if (csa_ie.count <= 1)
b4f286a1 1257 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
57eebdf3 1258 else
cc32abd4 1259 mod_timer(&ifmgd->chswitch_timer,
ff1e417c
LC		 1260 TU_TO_EXP_TIME((csa_ie.count - 1) *
1261 cbss->beacon_interval));
f3b0bbb3
JB		 1262 return;
1263 drop_connection:
1264 ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work);
1265 mutex_unlock(&local->chanctx_mtx);
1266 mutex_unlock(&local->mtx);
cc32abd4
JB		 1267}
1268
24a4e400
SG		 1269static bool
1270ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1271 struct ieee80211_channel *channel,
1272 const u8 *country_ie, u8 country_ie_len,
1273 const u8 *pwr_constr_elem,
1274 int *chan_pwr, int *pwr_reduction)
cc32abd4 1275{
04b7b2ff
JB		 1276 struct ieee80211_country_ie_triplet *triplet;
1277 int chan = ieee80211_frequency_to_channel(channel->center_freq);
24a4e400 1278 int i, chan_increment;
04b7b2ff 1279 bool have_chan_pwr = false;
cc32abd4 1280
04b7b2ff
JB		 1281 /* Invalid IE */
1282 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
24a4e400 1283 return false;
cc32abd4 1284
04b7b2ff
JB		 1285 triplet = (void *)(country_ie + 3);
1286 country_ie_len -= 3;
1287
1288 switch (channel->band) {
1289 default:
1290 WARN_ON_ONCE(1);
1291 /* fall through */
1292 case IEEE80211_BAND_2GHZ:
1293 case IEEE80211_BAND_60GHZ:
1294 chan_increment = 1;
1295 break;
1296 case IEEE80211_BAND_5GHZ:
1297 chan_increment = 4;
1298 break;
cc32abd4 1299 }
04b7b2ff
JB		 1300
1301 /* find channel */
1302 while (country_ie_len >= 3) {
1303 u8 first_channel = triplet->chans.first_channel;
1304
1305 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1306 goto next;
1307
1308 for (i = 0; i < triplet->chans.num_channels; i++) {
1309 if (first_channel + i * chan_increment == chan) {
1310 have_chan_pwr = true;
24a4e400 1311 *chan_pwr = triplet->chans.max_power;
04b7b2ff
JB		 1312 break;
1313 }
1314 }
1315 if (have_chan_pwr)
1316 break;
1317
1318 next:
1319 triplet++;
1320 country_ie_len -= 3;
1321 }
1322
a5fee9cb 1323 if (have_chan_pwr && pwr_constr_elem)
24a4e400 1324 *pwr_reduction = *pwr_constr_elem;
a5fee9cb
MB		 1325 else
1326 *pwr_reduction = 0;
1327
24a4e400
SG		 1328 return have_chan_pwr;
1329}
1330
c8d65917
SG		 1331static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
1332 struct ieee80211_channel *channel,
1333 const u8 *cisco_dtpc_ie,
1334 int *pwr_level)
1335{
1336 /* From practical testing, the first data byte of the DTPC element
1337 * seems to contain the requested dBm level, and the CLI on Cisco
1338 * APs clearly state the range is -127 to 127 dBm, which indicates
1339 * a signed byte, although it seemingly never actually goes negative.
1340 * The other byte seems to always be zero.
1341 */
1342 *pwr_level = (__s8)cisco_dtpc_ie[4];
1343}
1344
24a4e400
SG		 1345static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1346 struct ieee80211_channel *channel,
1347 struct ieee80211_mgmt *mgmt,
1348 const u8 *country_ie, u8 country_ie_len,
c8d65917
SG		 1349 const u8 *pwr_constr_ie,
1350 const u8 *cisco_dtpc_ie)
24a4e400 1351{
c8d65917
SG		 1352 bool has_80211h_pwr = false, has_cisco_pwr = false;
1353 int chan_pwr = 0, pwr_reduction_80211h = 0;
1354 int pwr_level_cisco, pwr_level_80211h;
24a4e400 1355 int new_ap_level;
a5fee9cb 1356 __le16 capab = mgmt->u.probe_resp.capab_info;
04b7b2ff 1357
a5fee9cb
MB		 1358 if (country_ie &&
1359 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) ||
1360 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) {
24a4e400
SG		 1361 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
1362 sdata, channel, country_ie, country_ie_len,
1363 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
c8d65917
SG		 1364 pwr_level_80211h =
1365 max_t(int, 0, chan_pwr - pwr_reduction_80211h);
1366 }
1367
1368 if (cisco_dtpc_ie) {
1369 ieee80211_find_cisco_dtpc(
1370 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
1371 has_cisco_pwr = true;
24a4e400 1372 }
04b7b2ff 1373
c8d65917 1374 if (!has_80211h_pwr && !has_cisco_pwr)
1ea6f9c0 1375 return 0;
04b7b2ff 1376
c8d65917
SG		 1377 /* If we have both 802.11h and Cisco DTPC, apply both limits
1378 * by picking the smallest of the two power levels advertised.
1379 */
1380 if (has_80211h_pwr &&
1381 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
cef2fc1c
JL		 1382 sdata_dbg(sdata,
1383 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1384 pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
1385 sdata->u.mgd.bssid);
c8d65917
SG		 1386 new_ap_level = pwr_level_80211h;
1387 } else { /* has_cisco_pwr is always true here. */
cef2fc1c
JL		 1388 sdata_dbg(sdata,
1389 "Limiting TX power to %d dBm as advertised by %pM\n",
1390 pwr_level_cisco, sdata->u.mgd.bssid);
c8d65917
SG		 1391 new_ap_level = pwr_level_cisco;
1392 }
04b7b2ff 1393
1ea6f9c0
JB		 1394 if (sdata->ap_power_level == new_ap_level)
1395 return 0;
04b7b2ff 1396
1ea6f9c0
JB		 1397 sdata->ap_power_level = new_ap_level;
1398 if (__ieee80211_recalc_txpower(sdata))
1399 return BSS_CHANGED_TXPOWER;
1400 return 0;
cc32abd4
JB		 1401}
1402
965bedad
JB		 1403/* powersave */
1404static void ieee80211_enable_ps(struct ieee80211_local *local,
1405 struct ieee80211_sub_if_data *sdata)
1406{
1407 struct ieee80211_conf *conf = &local->hw.conf;
1408
d5edaedc
JB		 1409 /*
1410 * If we are scanning right now then the parameters will
1411 * take effect when scan finishes.
1412 */
fbe9c429 1413 if (local->scanning)
d5edaedc
JB		 1414 return;
1415
965bedad 1416 if (conf->dynamic_ps_timeout > 0 &&
30686bf7 1417 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) {
965bedad
JB		 1418 mod_timer(&local->dynamic_ps_timer, jiffies +
1419 msecs_to_jiffies(conf->dynamic_ps_timeout));
1420 } else {
30686bf7 1421 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK))
076cdcb1 1422 ieee80211_send_nullfunc(local, sdata, true);
375177bf 1423
30686bf7
JB		 1424 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1425 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
2a13052f
JO		 1426 return;
1427
1428 conf->flags |= IEEE80211_CONF_PS;
1429 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965bedad
JB		 1430 }
1431}
1432
1433static void ieee80211_change_ps(struct ieee80211_local *local)
1434{
1435 struct ieee80211_conf *conf = &local->hw.conf;
1436
1437 if (local->ps_sdata) {
965bedad
JB		 1438 ieee80211_enable_ps(local, local->ps_sdata);
1439 } else if (conf->flags & IEEE80211_CONF_PS) {
1440 conf->flags &= ~IEEE80211_CONF_PS;
1441 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1442 del_timer_sync(&local->dynamic_ps_timer);
1443 cancel_work_sync(&local->dynamic_ps_enable_work);
1444 }
1445}
1446
808118cb
JY		 1447static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1448{
1449 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1450 struct sta_info *sta = NULL;
c2c98fde 1451 bool authorized = false;
808118cb
JY		 1452
1453 if (!mgd->powersave)
1454 return false;
1455
05cb9108
JB		 1456 if (mgd->broken_ap)
1457 return false;
1458
808118cb
JY		 1459 if (!mgd->associated)
1460 return false;
1461
392b9ffb 1462 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
808118cb
JY		 1463 return false;
1464
989c6505 1465 if (!mgd->have_beacon)
ce857888
AB		 1466 return false;
1467
808118cb
JY		 1468 rcu_read_lock();
1469 sta = sta_info_get(sdata, mgd->bssid);
1470 if (sta)
c2c98fde 1471 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
808118cb
JY		 1472 rcu_read_unlock();
1473
c2c98fde 1474 return authorized;
808118cb
JY		 1475}
1476
965bedad 1477/* need to hold RTNL or interface lock */
4a733ef1 1478void ieee80211_recalc_ps(struct ieee80211_local *local)
965bedad
JB		 1479{
1480 struct ieee80211_sub_if_data *sdata, *found = NULL;
1481 int count = 0;
195e294d 1482 int timeout;
965bedad 1483
30686bf7 1484 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) {
965bedad
JB		 1485 local->ps_sdata = NULL;
1486 return;
1487 }
1488
1489 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 1490 if (!ieee80211_sdata_running(sdata))
965bedad 1491 continue;
8c7914de
RM		 1492 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1493 /* If an AP vif is found, then disable PS
1494 * by setting the count to zero thereby setting
1495 * ps_sdata to NULL.
1496 */
1497 count = 0;
1498 break;
1499 }
965bedad
JB		 1500 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1501 continue;
1502 found = sdata;
1503 count++;
1504 }
1505
808118cb 1506 if (count == 1 && ieee80211_powersave_allowed(found)) {
4a733ef1 1507 u8 dtimper = found->u.mgd.dtim_period;
10f644a4
JB		 1508 s32 beaconint_us;
1509
10f644a4
JB		 1510 beaconint_us = ieee80211_tu_to_usec(
1511 found->vif.bss_conf.beacon_int);
1512
ff616381 1513 timeout = local->dynamic_ps_forced_timeout;
4a733ef1
JB		 1514 if (timeout < 0)
1515 timeout = 100;
09b85568 1516 local->hw.conf.dynamic_ps_timeout = timeout;
195e294d 1517
4a733ef1
JB		 1518 /* If the TIM IE is invalid, pretend the value is 1 */
1519 if (!dtimper)
1520 dtimper = 1;
1521
1522 local->hw.conf.ps_dtim_period = dtimper;
1523 local->ps_sdata = found;
10f644a4 1524 } else {
965bedad 1525 local->ps_sdata = NULL;
10f644a4 1526 }
965bedad
JB		 1527
1528 ieee80211_change_ps(local);
1529}
1530
ab095877
EP		 1531void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1532{
1533 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1534
1535 if (sdata->vif.bss_conf.ps != ps_allowed) {
1536 sdata->vif.bss_conf.ps = ps_allowed;
1537 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1538 }
1539}
1540
965bedad
JB		 1541void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1542{
1543 struct ieee80211_local *local =
1544 container_of(work, struct ieee80211_local,
1545 dynamic_ps_disable_work);
1546
1547 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1548 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1549 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1550 }
1551
1552 ieee80211_wake_queues_by_reason(&local->hw,
445ea4e8 1553 IEEE80211_MAX_QUEUE_MAP,
cca07b00
LC		 1554 IEEE80211_QUEUE_STOP_REASON_PS,
1555 false);
965bedad
JB		 1556}
1557
1558void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1559{
1560 struct ieee80211_local *local =
1561 container_of(work, struct ieee80211_local,
1562 dynamic_ps_enable_work);
1563 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
5e34069c 1564 struct ieee80211_if_managed *ifmgd;
1ddc2867
RM		 1565 unsigned long flags;
1566 int q;
965bedad
JB		 1567
1568 /* can only happen when PS was just disabled anyway */
1569 if (!sdata)
1570 return;
1571
5e34069c
CL		 1572 ifmgd = &sdata->u.mgd;
1573
965bedad
JB		 1574 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1575 return;
1576
09b85568 1577 if (local->hw.conf.dynamic_ps_timeout > 0) {
77b7023a
AN		 1578 /* don't enter PS if TX frames are pending */
1579 if (drv_tx_frames_pending(local)) {
1ddc2867
RM		 1580 mod_timer(&local->dynamic_ps_timer, jiffies +
1581 msecs_to_jiffies(
1582 local->hw.conf.dynamic_ps_timeout));
1583 return;
1584 }
77b7023a
AN		 1585
1586 /*
1587 * transmission can be stopped by others which leads to
1588 * dynamic_ps_timer expiry. Postpone the ps timer if it
1589 * is not the actual idle state.
1590 */
1591 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1592 for (q = 0; q < local->hw.queues; q++) {
1593 if (local->queue_stop_reasons[q]) {
1594 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1595 flags);
1596 mod_timer(&local->dynamic_ps_timer, jiffies +
1597 msecs_to_jiffies(
1598 local->hw.conf.dynamic_ps_timeout));
1599 return;
1600 }
1601 }
1602 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1ddc2867 1603 }
1ddc2867 1604
30686bf7 1605 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
9c38a8b4 1606 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
a1598383 1607 if (drv_tx_frames_pending(local)) {
e8306f98
VN		 1608 mod_timer(&local->dynamic_ps_timer, jiffies +
1609 msecs_to_jiffies(
1610 local->hw.conf.dynamic_ps_timeout));
a1598383 1611 } else {
076cdcb1 1612 ieee80211_send_nullfunc(local, sdata, true);
e8306f98 1613 /* Flush to get the tx status of nullfunc frame */
3b24f4c6 1614 ieee80211_flush_queues(local, sdata, false);
e8306f98 1615 }
f3e85b9e
VN		 1616 }
1617
30686bf7
JB		 1618 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
1619 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) ||
375177bf
VN		 1620 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1621 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1622 local->hw.conf.flags |= IEEE80211_CONF_PS;
1623 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1624 }
965bedad
JB		 1625}
1626
1627void ieee80211_dynamic_ps_timer(unsigned long data)
1628{
1629 struct ieee80211_local *local = (void *) data;
1630
42935eca 1631 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 1632}
1633
164eb02d
SW		 1634void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1635{
1636 struct delayed_work *delayed_work =
1637 container_of(work, struct delayed_work, work);
1638 struct ieee80211_sub_if_data *sdata =
1639 container_of(delayed_work, struct ieee80211_sub_if_data,
1640 dfs_cac_timer_work);
d2859df5 1641 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
164eb02d 1642
34a3740d
JB		 1643 mutex_lock(&sdata->local->mtx);
1644 if (sdata->wdev.cac_started) {
1645 ieee80211_vif_release_channel(sdata);
1646 cfg80211_cac_event(sdata->dev, &chandef,
1647 NL80211_RADAR_CAC_FINISHED,
1648 GFP_KERNEL);
1649 }
1650 mutex_unlock(&sdata->local->mtx);
164eb02d
SW		 1651}
1652
02219b3a
JB		 1653static bool
1654__ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1655{
1656 struct ieee80211_local *local = sdata->local;
1657 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
cc72f6e2 1658 bool ret = false;
02219b3a
JB		 1659 int ac;
1660
1661 if (local->hw.queues < IEEE80211_NUM_ACS)
1662 return false;
1663
1664 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1665 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
1666 int non_acm_ac;
1667 unsigned long now = jiffies;
1668
1669 if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
1670 tx_tspec->admitted_time &&
1671 time_after(now, tx_tspec->time_slice_start + HZ)) {
1672 tx_tspec->consumed_tx_time = 0;
1673 tx_tspec->time_slice_start = now;
1674
1675 if (tx_tspec->downgraded)
1676 tx_tspec->action =
1677 TX_TSPEC_ACTION_STOP_DOWNGRADE;
1678 }
1679
1680 switch (tx_tspec->action) {
1681 case TX_TSPEC_ACTION_STOP_DOWNGRADE:
1682 /* take the original parameters */
1683 if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac]))
1684 sdata_err(sdata,
1685 "failed to set TX queue parameters for queue %d\n",
1686 ac);
1687 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1688 tx_tspec->downgraded = false;
1689 ret = true;
1690 break;
1691 case TX_TSPEC_ACTION_DOWNGRADE:
1692 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
1693 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1694 ret = true;
1695 break;
1696 }
1697 /* downgrade next lower non-ACM AC */
1698 for (non_acm_ac = ac + 1;
1699 non_acm_ac < IEEE80211_NUM_ACS;
1700 non_acm_ac++)
1701 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
1702 break;
1703 /* The loop will result in using BK even if it requires
1704 * admission control, such configuration makes no sense
1705 * and we have to transmit somehow - the AC selection
1706 * does the same thing.
1707 */
1708 if (drv_conf_tx(local, sdata, ac,
1709 &sdata->tx_conf[non_acm_ac]))
1710 sdata_err(sdata,
1711 "failed to set TX queue parameters for queue %d\n",
1712 ac);
1713 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1714 ret = true;
1715 schedule_delayed_work(&ifmgd->tx_tspec_wk,
1716 tx_tspec->time_slice_start + HZ - now + 1);
1717 break;
1718 case TX_TSPEC_ACTION_NONE:
1719 /* nothing now */
1720 break;
1721 }
1722 }
1723
1724 return ret;
1725}
1726
1727void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1728{
1729 if (__ieee80211_sta_handle_tspec_ac_params(sdata))
1730 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1731}
1732
1733static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
1734{
1735 struct ieee80211_sub_if_data *sdata;
1736
1737 sdata = container_of(work, struct ieee80211_sub_if_data,
1738 u.mgd.tx_tspec_wk.work);
1739 ieee80211_sta_handle_tspec_ac_params(sdata);
1740}
1741
60f8b39c 1742/* MLME */
7d25745d 1743static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
4ced3f74 1744 struct ieee80211_sub_if_data *sdata,
4a3cb702 1745 const u8 *wmm_param, size_t wmm_param_len)
f0706e82 1746{
f0706e82 1747 struct ieee80211_tx_queue_params params;
4ced3f74 1748 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1749 size_t left;
1750 int count;
4a3cb702
JB		 1751 const u8 *pos;
1752 u8 uapsd_queues = 0;
f0706e82 1753
e1b3ec1a 1754 if (!local->ops->conf_tx)
7d25745d 1755 return false;
e1b3ec1a 1756
32c5057b 1757 if (local->hw.queues < IEEE80211_NUM_ACS)
7d25745d 1758 return false;
3434fbd3
JB		 1759
1760 if (!wmm_param)
7d25745d 1761 return false;
3434fbd3 1762
f0706e82 1763 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
7d25745d 1764 return false;
ab13315a
KV		 1765
1766 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
dc41e4d4 1767 uapsd_queues = ifmgd->uapsd_queues;
ab13315a 1768
f0706e82 1769 count = wmm_param[6] & 0x0f;
46900298 1770 if (count == ifmgd->wmm_last_param_set)
7d25745d 1771 return false;
46900298 1772 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 1773
1774 pos = wmm_param + 8;
1775 left = wmm_param_len - 8;
1776
1777 memset(&params, 0, sizeof(params));
1778
00e96dec 1779 sdata->wmm_acm = 0;
f0706e82
JB		 1780 for (; left >= 4; left -= 4, pos += 4) {
1781 int aci = (pos[0] >> 5) & 0x03;
1782 int acm = (pos[0] >> 4) & 0x01;
ab13315a 1783 bool uapsd = false;
f0706e82
JB		 1784 int queue;
1785
1786 switch (aci) {
0eeb59fe 1787 case 1: /* AC_BK */
e100bb64 1788 queue = 3;
988c0f72 1789 if (acm)
00e96dec 1790 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV		 1791 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1792 uapsd = true;
f0706e82 1793 break;
0eeb59fe 1794 case 2: /* AC_VI */
e100bb64 1795 queue = 1;
988c0f72 1796 if (acm)
00e96dec 1797 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV		 1798 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1799 uapsd = true;
f0706e82 1800 break;
0eeb59fe 1801 case 3: /* AC_VO */
e100bb64 1802 queue = 0;
988c0f72 1803 if (acm)
00e96dec 1804 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV		 1805 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1806 uapsd = true;
f0706e82 1807 break;
0eeb59fe 1808 case 0: /* AC_BE */
f0706e82 1809 default:
e100bb64 1810 queue = 2;
988c0f72 1811 if (acm)
00e96dec 1812 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV		 1813 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1814 uapsd = true;
f0706e82
JB		 1815 break;
1816 }
1817
1818 params.aifs = pos[0] & 0x0f;
1819 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1820 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 1821 params.txop = get_unaligned_le16(pos + 2);
908f8d07 1822 params.acm = acm;
ab13315a
KV		 1823 params.uapsd = uapsd;
1824
bdcbd8e0 1825 mlme_dbg(sdata,
02219b3a 1826 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
bdcbd8e0
JB		 1827 queue, aci, acm,
1828 params.aifs, params.cw_min, params.cw_max,
02219b3a
JB		 1829 params.txop, params.uapsd,
1830 ifmgd->tx_tspec[queue].downgraded);
f6f3def3 1831 sdata->tx_conf[queue] = params;
02219b3a
JB		 1832 if (!ifmgd->tx_tspec[queue].downgraded &&
1833 drv_conf_tx(local, sdata, queue, &params))
bdcbd8e0
JB		 1834 sdata_err(sdata,
1835 "failed to set TX queue parameters for queue %d\n",
1836 queue);
f0706e82 1837 }
e1b3ec1a
SG		 1838
1839 /* enable WMM or activate new settings */
4ced3f74 1840 sdata->vif.bss_conf.qos = true;
7d25745d 1841 return true;
f0706e82
JB		 1842}
1843
925e64c3
SG		 1844static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1845{
1846 lockdep_assert_held(&sdata->local->mtx);
1847
392b9ffb 1848 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
925e64c3
SG		 1849 ieee80211_run_deferred_scan(sdata->local);
1850}
1851
1852static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1853{
1854 mutex_lock(&sdata->local->mtx);
1855 __ieee80211_stop_poll(sdata);
1856 mutex_unlock(&sdata->local->mtx);
1857}
1858
7a5158ef
JB		 1859static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1860 u16 capab, bool erp_valid, u8 erp)
5628221c 1861{
bda3933a 1862 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 1863 u32 changed = 0;
7a5158ef
JB		 1864 bool use_protection;
1865 bool use_short_preamble;
1866 bool use_short_slot;
1867
1868 if (erp_valid) {
1869 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1870 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1871 } else {
1872 use_protection = false;
1873 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1874 }
1875
1876 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
55de908a 1877 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
43d35343 1878 use_short_slot = true;
5628221c 1879
471b3efd 1880 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 1881 bss_conf->use_cts_prot = use_protection;
1882 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 1883 }
7e9ed188 1884
d43c7b37 1885 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 1886 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 1887 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 1888 }
d9430a32 1889
7a5158ef 1890 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 1891 bss_conf->use_short_slot = use_short_slot;
1892 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 1893 }
1894
1895 return changed;
1896}
1897
f698d856 1898static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 1899 struct cfg80211_bss *cbss,
ae5eb026 1900 u32 bss_info_changed)
f0706e82 1901{
0c1ad2ca 1902 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 1903 struct ieee80211_local *local = sdata->local;
68542962 1904 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
d6f2da5b 1905
ae5eb026 1906 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 1907 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
50ae34a2 1908 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 1909
7ccc8bd7 1910 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
59c1ec2b 1911 beacon_loss_count * bss_conf->beacon_int));
7ccc8bd7 1912
0c1ad2ca
JB		 1913 sdata->u.mgd.associated = cbss;
1914 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 1915
17e4ec14
JM		 1916 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1917
488dd7b5 1918 if (sdata->vif.p2p) {
9caf0364 1919 const struct cfg80211_bss_ies *ies;
488dd7b5 1920
9caf0364
JB		 1921 rcu_read_lock();
1922 ies = rcu_dereference(cbss->ies);
1923 if (ies) {
9caf0364
JB		 1924 int ret;
1925
1926 ret = cfg80211_get_p2p_attr(
1927 ies->data, ies->len,
1928 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
67baf663
JD		 1929 (u8 *) &bss_conf->p2p_noa_attr,
1930 sizeof(bss_conf->p2p_noa_attr));
9caf0364 1931 if (ret >= 2) {
67baf663
JD		 1932 sdata->u.mgd.p2p_noa_index =
1933 bss_conf->p2p_noa_attr.index;
9caf0364 1934 bss_info_changed |= BSS_CHANGED_P2P_PS;
9caf0364 1935 }
488dd7b5 1936 }
9caf0364 1937 rcu_read_unlock();
488dd7b5
JB		 1938 }
1939
b291ba11 1940 /* just to be sure */
925e64c3 1941 ieee80211_stop_poll(sdata);
b291ba11 1942
9ac19a90 1943 ieee80211_led_assoc(local, 1);
9306102e 1944
989c6505 1945 if (sdata->u.mgd.have_beacon) {
826262c3
JB		 1946 /*
1947 * If the AP is buggy we may get here with no DTIM period
1948 * known, so assume it's 1 which is the only safe assumption
1949 * in that case, although if the TIM IE is broken powersave
1950 * probably just won't work at all.
1951 */
1952 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
817cee76 1953 bss_conf->beacon_rate = bss->beacon_rate;
989c6505 1954 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
826262c3 1955 } else {
817cee76 1956 bss_conf->beacon_rate = NULL;
e5b900d2 1957 bss_conf->dtim_period = 0;
826262c3 1958 }
e5b900d2 1959
68542962 1960 bss_conf->assoc = 1;
9cef8737 1961
a97c13c3 1962 /* Tell the driver to monitor connection quality (if supported) */
ea086359 1963 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
68542962 1964 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 1965 bss_info_changed |= BSS_CHANGED_CQM;
1966
68542962 1967 /* Enable ARP filtering */
0f19b41e 1968 if (bss_conf->arp_addr_cnt)
68542962 1969 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
68542962 1970
ae5eb026 1971 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 1972
056508dc 1973 mutex_lock(&local->iflist_mtx);
4a733ef1 1974 ieee80211_recalc_ps(local);
056508dc 1975 mutex_unlock(&local->iflist_mtx);
e0cb686f 1976
04ecd257 1977 ieee80211_recalc_smps(sdata);
ab095877
EP		 1978 ieee80211_recalc_ps_vif(sdata);
1979
9ac19a90 1980 netif_carrier_on(sdata->dev);
f0706e82
JB		 1981}
1982
e69e95db 1983static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
37ad3888
JB		 1984 u16 stype, u16 reason, bool tx,
1985 u8 *frame_buf)
aa458d17 1986{
46900298 1987 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17 1988 struct ieee80211_local *local = sdata->local;
3cc5240b 1989 u32 changed = 0;
aa458d17 1990
8d61ffa5 1991 sdata_assert_lock(sdata);
77fdaa12 1992
37ad3888
JB		 1993 if (WARN_ON_ONCE(tx && !frame_buf))
1994 return;
1995
b291ba11
JB		 1996 if (WARN_ON(!ifmgd->associated))
1997 return;
1998
79543d8e
DS		 1999 ieee80211_stop_poll(sdata);
2000
77fdaa12 2001 ifmgd->associated = NULL;
aa458d17
TW		 2002 netif_carrier_off(sdata->dev);
2003
88bc40e8
EP		 2004 /*
2005 * if we want to get out of ps before disassoc (why?) we have
2006 * to do it before sending disassoc, as otherwise the null-packet
2007 * won't be valid.
2008 */
2009 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2010 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2011 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2012 }
2013 local->ps_sdata = NULL;
2014
ab095877
EP		 2015 /* disable per-vif ps */
2016 ieee80211_recalc_ps_vif(sdata);
2017
14f2ae83
EG		 2018 /* make sure ongoing transmission finishes */
2019 synchronize_net();
2020
3b24f4c6
EG		 2021 /*
2022 * drop any frame before deauth/disassoc, this can be data or
2023 * management frame. Since we are disconnecting, we should not
2024 * insist sending these frames which can take time and delay
2025 * the disconnection and possible the roaming.
2026 */
f823981e 2027 if (tx)
3b24f4c6 2028 ieee80211_flush_queues(local, sdata, true);
f823981e 2029
37ad3888
JB		 2030 /* deauthenticate/disassociate now */
2031 if (tx || frame_buf)
88a9e31c
EP		 2032 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
2033 reason, tx, frame_buf);
37ad3888 2034
3b24f4c6 2035 /* flush out frame - make sure the deauth was actually sent */
37ad3888 2036 if (tx)
3b24f4c6 2037 ieee80211_flush_queues(local, sdata, false);
37ad3888 2038
88a9e31c 2039 /* clear bssid only after building the needed mgmt frames */
c84a67a2 2040 eth_zero_addr(ifmgd->bssid);
88a9e31c 2041
37ad3888 2042 /* remove AP and TDLS peers */
d34ba216 2043 sta_info_flush(sdata);
37ad3888
JB		 2044
2045 /* finally reset all BSS / config parameters */
f5e5bf25
TW		 2046 changed |= ieee80211_reset_erp_info(sdata);
2047
f5e5bf25 2048 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 2049 changed |= BSS_CHANGED_ASSOC;
2050 sdata->vif.bss_conf.assoc = false;
f5e5bf25 2051
67baf663
JD		 2052 ifmgd->p2p_noa_index = -1;
2053 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
2054 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
488dd7b5 2055
dd5ecfea 2056 /* on the next assoc, re-program HT/VHT parameters */
ef96a842
BG		 2057 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
2058 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
dd5ecfea
JB		 2059 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
2060 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
322cd406 2061 sdata->flags &= ~IEEE80211_SDATA_MU_MIMO_OWNER;
413ad50a 2062
1ea6f9c0 2063 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
a8302de9 2064
520eb820
KV		 2065 del_timer_sync(&local->dynamic_ps_timer);
2066 cancel_work_sync(&local->dynamic_ps_enable_work);
2067
68542962 2068 /* Disable ARP filtering */
0f19b41e 2069 if (sdata->vif.bss_conf.arp_addr_cnt)
68542962 2070 changed |= BSS_CHANGED_ARP_FILTER;
68542962 2071
3abead59
JB		 2072 sdata->vif.bss_conf.qos = false;
2073 changed |= BSS_CHANGED_QOS;
2074
0aaffa9b
JB		 2075 /* The BSSID (not really interesting) and HT changed */
2076 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 2077 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 2078
3abead59 2079 /* disassociated - set to defaults now */
cec66283 2080 ieee80211_set_wmm_default(sdata, false, false);
3abead59 2081
b9dcf712
JB		 2082 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
2083 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
2084 del_timer_sync(&sdata->u.mgd.timer);
2085 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2d9957cc 2086
826262c3 2087 sdata->vif.bss_conf.dtim_period = 0;
817cee76
AB		 2088 sdata->vif.bss_conf.beacon_rate = NULL;
2089
989c6505 2090 ifmgd->have_beacon = false;
826262c3 2091
028e8da0 2092 ifmgd->flags = 0;
34a3740d 2093 mutex_lock(&local->mtx);
028e8da0 2094 ieee80211_vif_release_channel(sdata);
59af6928
MK		 2095
2096 sdata->vif.csa_active = false;
0c21e632 2097 ifmgd->csa_waiting_bcn = false;
f84eaa10 2098 ifmgd->csa_ignored_same_chan = false;
a46992b4
LC		 2099 if (sdata->csa_block_tx) {
2100 ieee80211_wake_vif_queues(local, sdata,
2101 IEEE80211_QUEUE_STOP_REASON_CSA);
2102 sdata->csa_block_tx = false;
2103 }
34a3740d 2104 mutex_unlock(&local->mtx);
2475b1cc 2105
02219b3a
JB		 2106 /* existing TX TSPEC sessions no longer exist */
2107 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
2108 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
2109
2475b1cc 2110 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
aa458d17 2111}
f0706e82 2112
3cf335d5
KV		 2113void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
2114 struct ieee80211_hdr *hdr)
2115{
2116 /*
2117 * We can postpone the mgd.timer whenever receiving unicast frames
2118 * from AP because we know that the connection is working both ways
2119 * at that time. But multicast frames (and hence also beacons) must
2120 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 2121 * data idle periods for sending the periodic probe request to the
2122 * AP we're connected to.
3cf335d5 2123 */
b291ba11
JB		 2124 if (is_multicast_ether_addr(hdr->addr1))
2125 return;
2126
be099e82 2127 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 2128}
f0706e82 2129
4e5ff376
FF		 2130static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
2131{
2132 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
133d40f9 2133 struct ieee80211_local *local = sdata->local;
4e5ff376 2134
133d40f9 2135 mutex_lock(&local->mtx);
392b9ffb
SG		 2136 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
2137 goto out;
4e5ff376 2138
925e64c3 2139 __ieee80211_stop_poll(sdata);
133d40f9
SG		 2140
2141 mutex_lock(&local->iflist_mtx);
4a733ef1 2142 ieee80211_recalc_ps(local);
133d40f9 2143 mutex_unlock(&local->iflist_mtx);
4e5ff376 2144
30686bf7 2145 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
133d40f9 2146 goto out;
4e5ff376
FF		 2147
2148 /*
2149 * We've received a probe response, but are not sure whether
2150 * we have or will be receiving any beacons or data, so let's
2151 * schedule the timers again, just in case.
2152 */
2153 ieee80211_sta_reset_beacon_monitor(sdata);
2154
2155 mod_timer(&ifmgd->conn_mon_timer,
2156 round_jiffies_up(jiffies +
2157 IEEE80211_CONNECTION_IDLE_TIME));
133d40f9 2158out:
133d40f9 2159 mutex_unlock(&local->mtx);
4e5ff376
FF		 2160}
2161
02219b3a
JB		 2162static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
2163 struct ieee80211_hdr *hdr,
2164 u16 tx_time)
2165{
2166 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2167 u16 tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
2168 int ac = ieee80211_ac_from_tid(tid);
2169 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
2170 unsigned long now = jiffies;
2171
2172 if (likely(!tx_tspec->admitted_time))
2173 return;
2174
2175 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2176 tx_tspec->consumed_tx_time = 0;
2177 tx_tspec->time_slice_start = now;
2178
2179 if (tx_tspec->downgraded) {
2180 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
2181 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2182 }
2183 }
2184
2185 if (tx_tspec->downgraded)
2186 return;
2187
2188 tx_tspec->consumed_tx_time += tx_time;
2189
2190 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
2191 tx_tspec->downgraded = true;
2192 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
2193 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2194 }
2195}
2196
4e5ff376 2197void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
02219b3a 2198 struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
4e5ff376 2199{
02219b3a
JB		 2200 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
2201
75706d0e 2202 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF		 2203 return;
2204
4e5ff376
FF		 2205 if (ieee80211_is_nullfunc(hdr->frame_control) &&
2206 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e 2207 if (ack)
cab1c7fd 2208 ieee80211_sta_reset_conn_monitor(sdata);
04ac3c0e
FF		 2209 else
2210 sdata->u.mgd.nullfunc_failed = true;
4e5ff376 2211 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
cab1c7fd 2212 return;
4e5ff376 2213 }
cab1c7fd
WD		 2214
2215 if (ack)
2216 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF		 2217}
2218
a43abf29
ML		 2219static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2220{
2221 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2222 const u8 *ssid;
f01a067d 2223 u8 *dst = ifmgd->associated->bssid;
180205bd 2224 u8 unicast_limit = max(1, max_probe_tries - 3);
f01a067d
LR		 2225
2226 /*
2227 * Try sending broadcast probe requests for the last three
2228 * probe requests after the first ones failed since some
2229 * buggy APs only support broadcast probe requests.
2230 */
2231 if (ifmgd->probe_send_count >= unicast_limit)
2232 dst = NULL;
a43abf29 2233
4e5ff376
FF		 2234 /*
2235 * When the hardware reports an accurate Tx ACK status, it's
2236 * better to send a nullfunc frame instead of a probe request,
2237 * as it will kick us off the AP quickly if we aren't associated
2238 * anymore. The timeout will be reset if the frame is ACKed by
2239 * the AP.
2240 */
992e68bf
SD		 2241 ifmgd->probe_send_count++;
2242
30686bf7 2243 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) {
04ac3c0e 2244 ifmgd->nullfunc_failed = false;
076cdcb1 2245 ieee80211_send_nullfunc(sdata->local, sdata, false);
04ac3c0e 2246 } else {
88c868c4
SG		 2247 int ssid_len;
2248
9caf0364 2249 rcu_read_lock();
4e5ff376 2250 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
88c868c4
SG		 2251 if (WARN_ON_ONCE(ssid == NULL))
2252 ssid_len = 0;
2253 else
2254 ssid_len = ssid[1];
2255
a73f8e21 2256 ieee80211_send_probe_req(sdata, sdata->vif.addr, dst,
a344d677 2257 ssid + 2, ssid_len, NULL,
1672c0e3 2258 0, (u32) -1, true, 0,
55de908a 2259 ifmgd->associated->channel, false);
9caf0364 2260 rcu_read_unlock();
4e5ff376 2261 }
a43abf29 2262
180205bd 2263 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
8d61ffa5 2264 run_again(sdata, ifmgd->probe_timeout);
a43abf29
ML		 2265}
2266
b291ba11
JB		 2267static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2268 bool beacon)
04de8381 2269{
04de8381 2270 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 2271 bool already = false;
34bfc411 2272
9607e6b6 2273 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 2274 return;
2275
8d61ffa5 2276 sdata_lock(sdata);
77fdaa12
JB		 2277
2278 if (!ifmgd->associated)
2279 goto out;
2280
133d40f9
SG		 2281 mutex_lock(&sdata->local->mtx);
2282
2283 if (sdata->local->tmp_channel || sdata->local->scanning) {
2284 mutex_unlock(&sdata->local->mtx);
2285 goto out;
2286 }
2287
a13fbe54 2288 if (beacon) {
bdcbd8e0 2289 mlme_dbg_ratelimited(sdata,
59c1ec2b
BG		 2290 "detected beacon loss from AP (missed %d beacons) - probing\n",
2291 beacon_loss_count);
bdcbd8e0 2292
98f03342 2293 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
a13fbe54 2294 }
04de8381 2295
b291ba11
JB		 2296 /*
2297 * The driver/our work has already reported this event or the
2298 * connection monitoring has kicked in and we have already sent
2299 * a probe request. Or maybe the AP died and the driver keeps
2300 * reporting until we disassociate...
2301 *
2302 * In either case we have to ignore the current call to this
2303 * function (except for setting the correct probe reason bit)
2304 * because otherwise we would reset the timer every time and
2305 * never check whether we received a probe response!
2306 */
392b9ffb 2307 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
b291ba11
JB		 2308 already = true;
2309
12b5f34d
EP		 2310 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2311
133d40f9
SG		 2312 mutex_unlock(&sdata->local->mtx);
2313
b291ba11
JB		 2314 if (already)
2315 goto out;
2316
4e751843 2317 mutex_lock(&sdata->local->iflist_mtx);
4a733ef1 2318 ieee80211_recalc_ps(sdata->local);
4e751843
JB		 2319 mutex_unlock(&sdata->local->iflist_mtx);
2320
a43abf29
ML		 2321 ifmgd->probe_send_count = 0;
2322 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12 2323 out:
8d61ffa5 2324 sdata_unlock(sdata);
04de8381
KV		 2325}
2326
a619a4c0
JO		 2327struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2328 struct ieee80211_vif *vif)
2329{
2330 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2331 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d9b3b28b 2332 struct cfg80211_bss *cbss;
a619a4c0
JO		 2333 struct sk_buff *skb;
2334 const u8 *ssid;
88c868c4 2335 int ssid_len;
a619a4c0
JO		 2336
2337 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2338 return NULL;
2339
8d61ffa5 2340 sdata_assert_lock(sdata);
a619a4c0 2341
d9b3b28b
EP		 2342 if (ifmgd->associated)
2343 cbss = ifmgd->associated;
2344 else if (ifmgd->auth_data)
2345 cbss = ifmgd->auth_data->bss;
2346 else if (ifmgd->assoc_data)
2347 cbss = ifmgd->assoc_data->bss;
2348 else
a619a4c0
JO		 2349 return NULL;
2350
9caf0364 2351 rcu_read_lock();
d9b3b28b 2352 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
88c868c4
SG		 2353 if (WARN_ON_ONCE(ssid == NULL))
2354 ssid_len = 0;
2355 else
2356 ssid_len = ssid[1];
2357
a344d677 2358 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
55de908a 2359 (u32) -1, cbss->channel,
6b77863b 2360 ssid + 2, ssid_len,
85a237fe 2361 NULL, 0, true);
9caf0364 2362 rcu_read_unlock();
a619a4c0
JO		 2363
2364 return skb;
2365}
2366EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2367
a90faa9d
EG		 2368static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata,
2369 const u8 *buf, size_t len, bool tx,
2370 u16 reason)
2371{
2372 struct ieee80211_event event = {
2373 .type = MLME_EVENT,
2374 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT,
2375 .u.mlme.reason = reason,
2376 };
2377
2378 if (tx)
2379 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len);
2380 else
2381 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len);
2382
2383 drv_event_callback(sdata->local, sdata, &event);
2384}
2385
eef9e54c 2386static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
1e4dcd01 2387{
59af6928 2388 struct ieee80211_local *local = sdata->local;
1e4dcd01 2389 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 2390 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
1e4dcd01 2391
8d61ffa5 2392 sdata_lock(sdata);
1e4dcd01 2393 if (!ifmgd->associated) {
8d61ffa5 2394 sdata_unlock(sdata);
1e4dcd01
JO		 2395 return;
2396 }
2397
37ad3888
JB		 2398 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2399 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
eef9e54c 2400 true, frame_buf);
59af6928 2401 mutex_lock(&local->mtx);
7578d575 2402 sdata->vif.csa_active = false;
0c21e632 2403 ifmgd->csa_waiting_bcn = false;
a46992b4
LC		 2404 if (sdata->csa_block_tx) {
2405 ieee80211_wake_vif_queues(local, sdata,
2406 IEEE80211_QUEUE_STOP_REASON_CSA);
2407 sdata->csa_block_tx = false;
2408 }
59af6928 2409 mutex_unlock(&local->mtx);
7da7cc1d 2410
a90faa9d
EG		 2411 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
2412 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2413
8d61ffa5 2414 sdata_unlock(sdata);
1e4dcd01
JO		 2415}
2416
cc74c0c7 2417static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 2418{
2419 struct ieee80211_sub_if_data *sdata =
2420 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 2421 u.mgd.beacon_connection_loss_work);
a85e1d55 2422 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
a85e1d55 2423
976bd9ef
JB		 2424 if (ifmgd->associated)
2425 ifmgd->beacon_loss_count++;
b291ba11 2426
682bd38b 2427 if (ifmgd->connection_loss) {
882a7c69
JB		 2428 sdata_info(sdata, "Connection to AP %pM lost\n",
2429 ifmgd->bssid);
eef9e54c 2430 __ieee80211_disconnect(sdata);
882a7c69 2431 } else {
1e4dcd01 2432 ieee80211_mgd_probe_ap(sdata, true);
882a7c69
JB		 2433 }
2434}
2435
2436static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2437{
2438 struct ieee80211_sub_if_data *sdata =
2439 container_of(work, struct ieee80211_sub_if_data,
2440 u.mgd.csa_connection_drop_work);
2441
eef9e54c 2442 __ieee80211_disconnect(sdata);
b291ba11
JB		 2443}
2444
04de8381
KV		 2445void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2446{
2447 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 2448 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 2449
b5878a2d
JB		 2450 trace_api_beacon_loss(sdata);
2451
682bd38b 2452 sdata->u.mgd.connection_loss = false;
1e4dcd01 2453 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 2454}
2455EXPORT_SYMBOL(ieee80211_beacon_loss);
2456
1e4dcd01
JO		 2457void ieee80211_connection_loss(struct ieee80211_vif *vif)
2458{
2459 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2460 struct ieee80211_hw *hw = &sdata->local->hw;
2461
b5878a2d
JB		 2462 trace_api_connection_loss(sdata);
2463
682bd38b 2464 sdata->u.mgd.connection_loss = true;
1e4dcd01
JO		 2465 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2466}
2467EXPORT_SYMBOL(ieee80211_connection_loss);
2468
2469
66e67e41
JB		 2470static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2471 bool assoc)
2472{
2473 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2474
8d61ffa5 2475 sdata_assert_lock(sdata);
66e67e41 2476
66e67e41 2477 if (!assoc) {
c1e140bf
EG		 2478 /*
2479 * we are not authenticated yet, the only timer that could be
2480 * running is the timeout for the authentication response which
2481 * which is not relevant anymore.
2482 */
2483 del_timer_sync(&sdata->u.mgd.timer);
66e67e41
JB		 2484 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2485
c84a67a2 2486 eth_zero_addr(sdata->u.mgd.bssid);
66e67e41 2487 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
028e8da0 2488 sdata->u.mgd.flags = 0;
34a3740d 2489 mutex_lock(&sdata->local->mtx);
55de908a 2490 ieee80211_vif_release_channel(sdata);
34a3740d 2491 mutex_unlock(&sdata->local->mtx);
66e67e41
JB		 2492 }
2493
5b112d3d 2494 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
66e67e41
JB		 2495 kfree(auth_data);
2496 sdata->u.mgd.auth_data = NULL;
2497}
2498
c9c99f89
JB		 2499static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2500 bool assoc)
2501{
2502 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2503
2504 sdata_assert_lock(sdata);
2505
2506 if (!assoc) {
2507 /*
2508 * we are not associated yet, the only timer that could be
2509 * running is the timeout for the association response which
2510 * which is not relevant anymore.
2511 */
2512 del_timer_sync(&sdata->u.mgd.timer);
2513 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2514
2515 eth_zero_addr(sdata->u.mgd.bssid);
2516 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2517 sdata->u.mgd.flags = 0;
322cd406 2518 sdata->flags &= ~IEEE80211_SDATA_MU_MIMO_OWNER;
c9c99f89
JB		 2519 mutex_lock(&sdata->local->mtx);
2520 ieee80211_vif_release_channel(sdata);
2521 mutex_unlock(&sdata->local->mtx);
2522 }
2523
2524 kfree(assoc_data);
2525 sdata->u.mgd.assoc_data = NULL;
2526}
2527
66e67e41
JB		 2528static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2529 struct ieee80211_mgmt *mgmt, size_t len)
2530{
1672c0e3 2531 struct ieee80211_local *local = sdata->local;
66e67e41
JB		 2532 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2533 u8 *pos;
2534 struct ieee802_11_elems elems;
1672c0e3 2535 u32 tx_flags = 0;
66e67e41
JB		 2536
2537 pos = mgmt->u.auth.variable;
b2e506bf 2538 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
66e67e41
JB		 2539 if (!elems.challenge)
2540 return;
2541 auth_data->expected_transaction = 4;
a1845fc7 2542 drv_mgd_prepare_tx(sdata->local, sdata);
30686bf7 2543 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1672c0e3
JB		 2544 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2545 IEEE80211_TX_INTFL_MLME_CONN_TX;
700e8ea6 2546 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
66e67e41
JB		 2547 elems.challenge - 2, elems.challenge_len + 2,
2548 auth_data->bss->bssid, auth_data->bss->bssid,
2549 auth_data->key, auth_data->key_len,
1672c0e3 2550 auth_data->key_idx, tx_flags);
66e67e41
JB		 2551}
2552
8d61ffa5
JB		 2553static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2554 struct ieee80211_mgmt *mgmt, size_t len)
66e67e41
JB		 2555{
2556 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2557 u8 bssid[ETH_ALEN];
2558 u16 auth_alg, auth_transaction, status_code;
2559 struct sta_info *sta;
a9409093
EG		 2560 struct ieee80211_event event = {
2561 .type = MLME_EVENT,
2562 .u.mlme.data = AUTH_EVENT,
2563 };
66e67e41 2564
8d61ffa5 2565 sdata_assert_lock(sdata);
66e67e41
JB		 2566
2567 if (len < 24 + 6)
8d61ffa5 2568 return;
66e67e41
JB		 2569
2570 if (!ifmgd->auth_data || ifmgd->auth_data->done)
8d61ffa5 2571 return;
66e67e41
JB		 2572
2573 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2574
b203ca39 2575 if (!ether_addr_equal(bssid, mgmt->bssid))
8d61ffa5 2576 return;
66e67e41
JB		 2577
2578 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2579 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2580 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2581
2582 if (auth_alg != ifmgd->auth_data->algorithm ||
0f4126e8
JM		 2583 auth_transaction != ifmgd->auth_data->expected_transaction) {
2584 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2585 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2586 auth_transaction,
2587 ifmgd->auth_data->expected_transaction);
8d61ffa5 2588 return;
0f4126e8 2589 }
66e67e41
JB		 2590
2591 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2592 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2593 mgmt->sa, status_code);
dac211ec 2594 ieee80211_destroy_auth_data(sdata, false);
6ff57cf8 2595 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
a9409093
EG		 2596 event.u.mlme.status = MLME_DENIED;
2597 event.u.mlme.reason = status_code;
2598 drv_event_callback(sdata->local, sdata, &event);
8d61ffa5 2599 return;
66e67e41
JB		 2600 }
2601
2602 switch (ifmgd->auth_data->algorithm) {
2603 case WLAN_AUTH_OPEN:
2604 case WLAN_AUTH_LEAP:
2605 case WLAN_AUTH_FT:
6b8ece3a 2606 case WLAN_AUTH_SAE:
66e67e41
JB		 2607 break;
2608 case WLAN_AUTH_SHARED_KEY:
2609 if (ifmgd->auth_data->expected_transaction != 4) {
2610 ieee80211_auth_challenge(sdata, mgmt, len);
2611 /* need another frame */
8d61ffa5 2612 return;
66e67e41
JB		 2613 }
2614 break;
2615 default:
2616 WARN_ONCE(1, "invalid auth alg %d",
2617 ifmgd->auth_data->algorithm);
8d61ffa5 2618 return;
66e67e41
JB		 2619 }
2620
a9409093
EG		 2621 event.u.mlme.status = MLME_SUCCESS;
2622 drv_event_callback(sdata->local, sdata, &event);
bdcbd8e0 2623 sdata_info(sdata, "authenticated\n");
66e67e41
JB		 2624 ifmgd->auth_data->done = true;
2625 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
89afe614 2626 ifmgd->auth_data->timeout_started = true;
8d61ffa5 2627 run_again(sdata, ifmgd->auth_data->timeout);
66e67e41 2628
6b8ece3a
JM		 2629 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2630 ifmgd->auth_data->expected_transaction != 2) {
2631 /*
2632 * Report auth frame to user space for processing since another
2633 * round of Authentication frames is still needed.
2634 */
6ff57cf8 2635 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
8d61ffa5 2636 return;
6b8ece3a
JM		 2637 }
2638
66e67e41
JB		 2639 /* move station state to auth */
2640 mutex_lock(&sdata->local->sta_mtx);
2641 sta = sta_info_get(sdata, bssid);
2642 if (!sta) {
2643 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2644 goto out_err;
2645 }
2646 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
bdcbd8e0 2647 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
66e67e41
JB		 2648 goto out_err;
2649 }
2650 mutex_unlock(&sdata->local->sta_mtx);
2651
6ff57cf8 2652 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
8d61ffa5 2653 return;
66e67e41
JB		 2654 out_err:
2655 mutex_unlock(&sdata->local->sta_mtx);
2656 /* ignore frame -- wait for timeout */
66e67e41
JB		 2657}
2658
dfa1ad29
CO		 2659#define case_WLAN(type) \
2660 case WLAN_REASON_##type: return #type
2661
2662static const char *ieee80211_get_reason_code_string(u16 reason_code)
2663{
2664 switch (reason_code) {
2665 case_WLAN(UNSPECIFIED);
2666 case_WLAN(PREV_AUTH_NOT_VALID);
2667 case_WLAN(DEAUTH_LEAVING);
2668 case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2669 case_WLAN(DISASSOC_AP_BUSY);
2670 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2671 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2672 case_WLAN(DISASSOC_STA_HAS_LEFT);
2673 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2674 case_WLAN(DISASSOC_BAD_POWER);
2675 case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2676 case_WLAN(INVALID_IE);
2677 case_WLAN(MIC_FAILURE);
2678 case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2679 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2680 case_WLAN(IE_DIFFERENT);
2681 case_WLAN(INVALID_GROUP_CIPHER);
2682 case_WLAN(INVALID_PAIRWISE_CIPHER);
2683 case_WLAN(INVALID_AKMP);
2684 case_WLAN(UNSUPP_RSN_VERSION);
2685 case_WLAN(INVALID_RSN_IE_CAP);
2686 case_WLAN(IEEE8021X_FAILED);
2687 case_WLAN(CIPHER_SUITE_REJECTED);
2688 case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2689 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2690 case_WLAN(DISASSOC_LOW_ACK);
2691 case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2692 case_WLAN(QSTA_LEAVE_QBSS);
2693 case_WLAN(QSTA_NOT_USE);
2694 case_WLAN(QSTA_REQUIRE_SETUP);
2695 case_WLAN(QSTA_TIMEOUT);
2696 case_WLAN(QSTA_CIPHER_NOT_SUPP);
2697 case_WLAN(MESH_PEER_CANCELED);
2698 case_WLAN(MESH_MAX_PEERS);
2699 case_WLAN(MESH_CONFIG);
2700 case_WLAN(MESH_CLOSE);
2701 case_WLAN(MESH_MAX_RETRIES);
2702 case_WLAN(MESH_CONFIRM_TIMEOUT);
2703 case_WLAN(MESH_INVALID_GTK);
2704 case_WLAN(MESH_INCONSISTENT_PARAM);
2705 case_WLAN(MESH_INVALID_SECURITY);
2706 case_WLAN(MESH_PATH_ERROR);
2707 case_WLAN(MESH_PATH_NOFORWARD);
2708 case_WLAN(MESH_PATH_DEST_UNREACHABLE);
2709 case_WLAN(MAC_EXISTS_IN_MBSS);
2710 case_WLAN(MESH_CHAN_REGULATORY);
2711 case_WLAN(MESH_CHAN);
2712 default: return "<unknown>";
2713 }
2714}
66e67e41 2715
8d61ffa5
JB		 2716static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2717 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2718{
46900298 2719 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
c9c99f89 2720 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
f0706e82 2721
8d61ffa5 2722 sdata_assert_lock(sdata);
66e67e41 2723
f4ea83dd 2724 if (len < 24 + 2)
8d61ffa5 2725 return;
f0706e82 2726
c9c99f89
JB		 2727 if (ifmgd->associated &&
2728 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) {
2729 const u8 *bssid = ifmgd->associated->bssid;
77fdaa12 2730
c9c99f89
JB		 2731 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
2732 bssid, reason_code,
2733 ieee80211_get_reason_code_string(reason_code));
f0706e82 2734
c9c99f89 2735 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
f0706e82 2736
c9c99f89
JB		 2737 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false,
2738 reason_code);
2739 return;
2740 }
77fdaa12 2741
c9c99f89
JB		 2742 if (ifmgd->assoc_data &&
2743 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
2744 const u8 *bssid = ifmgd->assoc_data->bss->bssid;
37ad3888 2745
c9c99f89
JB		 2746 sdata_info(sdata,
2747 "deauthenticated from %pM while associating (Reason: %u=%s)\n",
2748 bssid, reason_code,
2749 ieee80211_get_reason_code_string(reason_code));
2750
2751 ieee80211_destroy_assoc_data(sdata, false);
2752
2753 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2754 return;
2755 }
f0706e82
JB		 2756}
2757
2758
8d61ffa5
JB		 2759static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2760 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2761{
46900298 2762 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 2763 u16 reason_code;
2764
8d61ffa5 2765 sdata_assert_lock(sdata);
77fdaa12 2766
66e67e41 2767 if (len < 24 + 2)
8d61ffa5 2768 return;
77fdaa12 2769
66e67e41 2770 if (!ifmgd->associated ||
b203ca39 2771 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
8d61ffa5 2772 return;
f0706e82
JB		 2773
2774 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2775
bdcbd8e0
JB		 2776 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2777 mgmt->sa, reason_code);
f0706e82 2778
37ad3888
JB		 2779 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2780
a90faa9d 2781 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code);
f0706e82
JB		 2782}
2783
c74d084f
CL		 2784static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2785 u8 *supp_rates, unsigned int supp_rates_len,
2786 u32 *rates, u32 *basic_rates,
2787 bool *have_higher_than_11mbit,
2103dec1
SW		 2788 int *min_rate, int *min_rate_index,
2789 int shift, u32 rate_flags)
c74d084f
CL		 2790{
2791 int i, j;
2792
2793 for (i = 0; i < supp_rates_len; i++) {
2103dec1 2794 int rate = supp_rates[i] & 0x7f;
c74d084f
CL		 2795 bool is_basic = !!(supp_rates[i] & 0x80);
2796
2103dec1 2797 if ((rate * 5 * (1 << shift)) > 110)
c74d084f
CL		 2798 *have_higher_than_11mbit = true;
2799
2800 /*
2801 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2802 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2803 *
2804 * Note: Even through the membership selector and the basic
2805 * rate flag share the same bit, they are not exactly
2806 * the same.
2807 */
2808 if (!!(supp_rates[i] & 0x80) &&
2809 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2810 continue;
2811
2812 for (j = 0; j < sband->n_bitrates; j++) {
2103dec1
SW		 2813 struct ieee80211_rate *br;
2814 int brate;
2815
2816 br = &sband->bitrates[j];
2817 if ((rate_flags & br->flags) != rate_flags)
2818 continue;
2819
2820 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2821 if (brate == rate) {
c74d084f
CL		 2822 *rates |= BIT(j);
2823 if (is_basic)
2824 *basic_rates |= BIT(j);
2103dec1
SW		 2825 if ((rate * 5) < *min_rate) {
2826 *min_rate = rate * 5;
c74d084f
CL		 2827 *min_rate_index = j;
2828 }
2829 break;
2830 }
2831 }
2832 }
2833}
f0706e82 2834
66e67e41
JB		 2835static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2836 struct cfg80211_bss *cbss,
af6b6374 2837 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2838{
46900298 2839 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 2840 struct ieee80211_local *local = sdata->local;
8318d78a 2841 struct ieee80211_supported_band *sband;
f0706e82 2842 struct sta_info *sta;
af6b6374 2843 u8 *pos;
af6b6374 2844 u16 capab_info, aid;
f0706e82 2845 struct ieee802_11_elems elems;
bda3933a 2846 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
35d865af
JB		 2847 const struct cfg80211_bss_ies *bss_ies = NULL;
2848 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
ae5eb026 2849 u32 changed = 0;
c74d084f 2850 int err;
35d865af 2851 bool ret;
f0706e82 2852
af6b6374 2853 /* AssocResp and ReassocResp have identical structure */
f0706e82 2854
f0706e82 2855 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 2856 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 2857
1dd84aa2 2858 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
bdcbd8e0
JB		 2859 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2860 aid);
1dd84aa2
JB		 2861 aid &= ~(BIT(15) | BIT(14));
2862
05cb9108
JB		 2863 ifmgd->broken_ap = false;
2864
2865 if (aid == 0 || aid > IEEE80211_MAX_AID) {
bdcbd8e0
JB		 2866 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2867 aid);
05cb9108
JB		 2868 aid = 0;
2869 ifmgd->broken_ap = true;
2870 }
2871
af6b6374 2872 pos = mgmt->u.assoc_resp.variable;
b2e506bf 2873 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
af6b6374 2874
f0706e82 2875 if (!elems.supp_rates) {
bdcbd8e0 2876 sdata_info(sdata, "no SuppRates element in AssocResp\n");
af6b6374 2877 return false;
f0706e82
JB		 2878 }
2879
46900298 2880 ifmgd->aid = aid;
9041c1fa
AN		 2881 ifmgd->tdls_chan_switch_prohibited =
2882 elems.ext_capab && elems.ext_capab_len >= 5 &&
2883 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
f0706e82 2884
35d865af
JB		 2885 /*
2886 * Some APs are erroneously not including some information in their
2887 * (re)association response frames. Try to recover by using the data
2888 * from the beacon or probe response. This seems to afflict mobile
2889 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2890 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2891 */
2892 if ((assoc_data->wmm && !elems.wmm_param) ||
2893 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2894 (!elems.ht_cap_elem || !elems.ht_operation)) ||
2895 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2896 (!elems.vht_cap_elem || !elems.vht_operation))) {
2897 const struct cfg80211_bss_ies *ies;
2898 struct ieee802_11_elems bss_elems;
2899
2900 rcu_read_lock();
2901 ies = rcu_dereference(cbss->ies);
2902 if (ies)
2903 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2904 GFP_ATOMIC);
2905 rcu_read_unlock();
2906 if (!bss_ies)
2907 return false;
2908
2909 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2910 false, &bss_elems);
2911 if (assoc_data->wmm &&
2912 !elems.wmm_param && bss_elems.wmm_param) {
2913 elems.wmm_param = bss_elems.wmm_param;
2914 sdata_info(sdata,
2915 "AP bug: WMM param missing from AssocResp\n");
2916 }
2917
2918 /*
2919 * Also check if we requested HT/VHT, otherwise the AP doesn't
2920 * have to include the IEs in the (re)association response.
2921 */
2922 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2923 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2924 elems.ht_cap_elem = bss_elems.ht_cap_elem;
2925 sdata_info(sdata,
2926 "AP bug: HT capability missing from AssocResp\n");
2927 }
2928 if (!elems.ht_operation && bss_elems.ht_operation &&
2929 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2930 elems.ht_operation = bss_elems.ht_operation;
2931 sdata_info(sdata,
2932 "AP bug: HT operation missing from AssocResp\n");
2933 }
2934 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2935 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2936 elems.vht_cap_elem = bss_elems.vht_cap_elem;
2937 sdata_info(sdata,
2938 "AP bug: VHT capa missing from AssocResp\n");
2939 }
2940 if (!elems.vht_operation && bss_elems.vht_operation &&
2941 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2942 elems.vht_operation = bss_elems.vht_operation;
2943 sdata_info(sdata,
2944 "AP bug: VHT operation missing from AssocResp\n");
2945 }
2946 }
2947
30eb1dc2
JB		 2948 /*
2949 * We previously checked these in the beacon/probe response, so
2950 * they should be present here. This is just a safety net.
2951 */
2952 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2953 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2954 sdata_info(sdata,
35d865af
JB		 2955 "HT AP is missing WMM params or HT capability/operation\n");
2956 ret = false;
2957 goto out;
30eb1dc2
JB		 2958 }
2959
2960 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2961 (!elems.vht_cap_elem || !elems.vht_operation)) {
2962 sdata_info(sdata,
35d865af
JB		 2963 "VHT AP is missing VHT capability/operation\n");
2964 ret = false;
2965 goto out;
30eb1dc2
JB		 2966 }
2967
2a33bee2
GE		 2968 mutex_lock(&sdata->local->sta_mtx);
2969 /*
2970 * station info was already allocated and inserted before
2971 * the association and should be available to us
2972 */
7852e361 2973 sta = sta_info_get(sdata, cbss->bssid);
2a33bee2
GE		 2974 if (WARN_ON(!sta)) {
2975 mutex_unlock(&sdata->local->sta_mtx);
35d865af
JB		 2976 ret = false;
2977 goto out;
77fdaa12 2978 }
05e5e883 2979
55de908a 2980 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
f709fc69 2981
30eb1dc2 2982 /* Set up internal HT/VHT capabilities */
a8243b72 2983 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
ef96a842 2984 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
e1a0c6b3 2985 elems.ht_cap_elem, sta);
64f68e5d 2986
818255ea
MP		 2987 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2988 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
4a34215e 2989 elems.vht_cap_elem, sta);
818255ea 2990
30eb1dc2
JB		 2991 /*
2992 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
2993 * in their association response, so ignore that data for our own
2994 * configuration. If it changed since the last beacon, we'll get the
2995 * next beacon and update then.
2996 */
1128958d 2997
bee7f586
JB		 2998 /*
2999 * If an operating mode notification IE is present, override the
3000 * NSS calculation (that would be done in rate_control_rate_init())
3001 * and use the # of streams from that element.
3002 */
3003 if (elems.opmode_notif &&
3004 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
3005 u8 nss;
3006
3007 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
3008 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
3009 nss += 1;
3010 sta->sta.rx_nss = nss;
3011 }
3012
4b7679a5 3013 rate_control_rate_init(sta);
f0706e82 3014
93f0490e 3015 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) {
c2c98fde 3016 set_sta_flag(sta, WLAN_STA_MFP);
93f0490e
T		 3017 sta->sta.mfp = true;
3018 } else {
3019 sta->sta.mfp = false;
3020 }
5394af4d 3021
527871d7 3022 sta->sta.wme = elems.wmm_param && local->hw.queues >= IEEE80211_NUM_ACS;
ddf4ac53 3023
3e4d40fa 3024 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
c8987876
JB		 3025 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
3026 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
3027 if (err) {
bdcbd8e0
JB		 3028 sdata_info(sdata,
3029 "failed to move station %pM to desired state\n",
3030 sta->sta.addr);
c8987876
JB		 3031 WARN_ON(__sta_info_destroy(sta));
3032 mutex_unlock(&sdata->local->sta_mtx);
35d865af
JB		 3033 ret = false;
3034 goto out;
c8987876
JB		 3035 }
3036
7852e361 3037 mutex_unlock(&sdata->local->sta_mtx);
ddf4ac53 3038
f2176d72
JO		 3039 /*
3040 * Always handle WMM once after association regardless
3041 * of the first value the AP uses. Setting -1 here has
3042 * that effect because the AP values is an unsigned
3043 * 4-bit value.
3044 */
3045 ifmgd->wmm_last_param_set = -1;
3046
095d81ce 3047 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && elems.wmm_param)
4ced3f74 3048 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 3049 elems.wmm_param_len);
aa837e1d 3050 else
cec66283 3051 ieee80211_set_wmm_default(sdata, false, false);
3abead59 3052 changed |= BSS_CHANGED_QOS;
f0706e82 3053
60f8b39c
JB		 3054 /* set AID and assoc capability,
3055 * ieee80211_set_associated() will tell the driver */
3056 bss_conf->aid = aid;
3057 bss_conf->assoc_capability = capab_info;
0c1ad2ca 3058 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 3059
d524215f
FF		 3060 /*
3061 * If we're using 4-addr mode, let the AP know that we're
3062 * doing so, so that it can create the STA VLAN on its side
3063 */
3064 if (ifmgd->use_4addr)
3065 ieee80211_send_4addr_nullfunc(local, sdata);
3066
15b7b062 3067 /*
b291ba11
JB		 3068 * Start timer to probe the connection to the AP now.
3069 * Also start the timer that will detect beacon loss.
15b7b062 3070 */
b291ba11 3071 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 3072 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 3073
35d865af
JB		 3074 ret = true;
3075 out:
3076 kfree(bss_ies);
3077 return ret;
f0706e82
JB		 3078}
3079
8d61ffa5
JB		 3080static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
3081 struct ieee80211_mgmt *mgmt,
3082 size_t len)
66e67e41
JB		 3083{
3084 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3085 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3086 u16 capab_info, status_code, aid;
3087 struct ieee802_11_elems elems;
b0b6aa2c 3088 int ac, uapsd_queues = -1;
66e67e41
JB		 3089 u8 *pos;
3090 bool reassoc;
8d61ffa5 3091 struct cfg80211_bss *bss;
d0d1a12f
EG		 3092 struct ieee80211_event event = {
3093 .type = MLME_EVENT,
3094 .u.mlme.data = ASSOC_EVENT,
3095 };
66e67e41 3096
8d61ffa5 3097 sdata_assert_lock(sdata);
66e67e41
JB		 3098
3099 if (!assoc_data)
8d61ffa5 3100 return;
b203ca39 3101 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
8d61ffa5 3102 return;
66e67e41
JB		 3103
3104 /*
3105 * AssocResp and ReassocResp have identical structure, so process both
3106 * of them in this function.
3107 */
3108
3109 if (len < 24 + 6)
8d61ffa5 3110 return;
66e67e41
JB		 3111
3112 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
3113 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3114 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
3115 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3116
bdcbd8e0
JB		 3117 sdata_info(sdata,
3118 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3119 reassoc ? "Rea" : "A", mgmt->sa,
3120 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
66e67e41
JB		 3121
3122 pos = mgmt->u.assoc_resp.variable;
b2e506bf 3123 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
66e67e41
JB		 3124
3125 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
79ba1d89
JB		 3126 elems.timeout_int &&
3127 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
66e67e41 3128 u32 tu, ms;
79ba1d89 3129 tu = le32_to_cpu(elems.timeout_int->value);
66e67e41 3130 ms = tu * 1024 / 1000;
bdcbd8e0
JB		 3131 sdata_info(sdata,
3132 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3133 mgmt->sa, tu, ms);
66e67e41 3134 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
89afe614 3135 assoc_data->timeout_started = true;
66e67e41 3136 if (ms > IEEE80211_ASSOC_TIMEOUT)
8d61ffa5
JB		 3137 run_again(sdata, assoc_data->timeout);
3138 return;
66e67e41
JB		 3139 }
3140
8d61ffa5 3141 bss = assoc_data->bss;
66e67e41
JB		 3142
3143 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 3144 sdata_info(sdata, "%pM denied association (code=%d)\n",
3145 mgmt->sa, status_code);
66e67e41 3146 ieee80211_destroy_assoc_data(sdata, false);
d0d1a12f
EG		 3147 event.u.mlme.status = MLME_DENIED;
3148 event.u.mlme.reason = status_code;
3149 drv_event_callback(sdata->local, sdata, &event);
66e67e41 3150 } else {
8d61ffa5 3151 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
66e67e41 3152 /* oops -- internal error -- send timeout for now */
10a9109f 3153 ieee80211_destroy_assoc_data(sdata, false);
959867fa 3154 cfg80211_assoc_timeout(sdata->dev, bss);
8d61ffa5 3155 return;
66e67e41 3156 }
d0d1a12f
EG		 3157 event.u.mlme.status = MLME_SUCCESS;
3158 drv_event_callback(sdata->local, sdata, &event);
635d999f 3159 sdata_info(sdata, "associated\n");
79ebfb85
JB		 3160
3161 /*
3162 * destroy assoc_data afterwards, as otherwise an idle
3163 * recalc after assoc_data is NULL but before associated
3164 * is set can cause the interface to go idle
3165 */
3166 ieee80211_destroy_assoc_data(sdata, true);
b0b6aa2c
EP		 3167
3168 /* get uapsd queues configuration */
3169 uapsd_queues = 0;
3170 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
3171 if (sdata->tx_conf[ac].uapsd)
3172 uapsd_queues |= BIT(ac);
66e67e41
JB		 3173 }
3174
b0b6aa2c 3175 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues);
66e67e41 3176}
8e3c1b77 3177
98c8fccf 3178static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
8e3c1b77 3179 struct ieee80211_mgmt *mgmt, size_t len,
98c8fccf 3180 struct ieee80211_rx_status *rx_status,
d45c4172 3181 struct ieee802_11_elems *elems)
98c8fccf
JB		 3182{
3183 struct ieee80211_local *local = sdata->local;
c2b13452 3184 struct ieee80211_bss *bss;
98c8fccf 3185 struct ieee80211_channel *channel;
56007a02 3186
8d61ffa5 3187 sdata_assert_lock(sdata);
b4f286a1 3188
3afc2167
EG		 3189 channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
3190 if (!channel)
98c8fccf
JB		 3191 return;
3192
98c8fccf 3193 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
d45c4172 3194 channel);
817cee76 3195 if (bss) {
817cee76 3196 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
d2722f8b 3197 ieee80211_rx_bss_put(local, bss);
817cee76 3198 }
f0706e82
JB		 3199}
3200
3201
f698d856 3202static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 3203 struct sk_buff *skb)
f0706e82 3204{
af6b6374 3205 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 3206 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 3207 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
3208 size_t baselen, len = skb->len;
ae6a44e3
EK		 3209 struct ieee802_11_elems elems;
3210
15b7b062
KV		 3211 ifmgd = &sdata->u.mgd;
3212
8d61ffa5 3213 sdata_assert_lock(sdata);
77fdaa12 3214
b203ca39 3215 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
8e7cdbb6
TW		 3216 return; /* ignore ProbeResp to foreign address */
3217
ae6a44e3
EK		 3218 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
3219 if (baselen > len)
3220 return;
3221
3222 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
b2e506bf 3223 false, &elems);
ae6a44e3 3224
d45c4172 3225 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
9859b81e 3226
77fdaa12 3227 if (ifmgd->associated &&
b203ca39 3228 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
4e5ff376 3229 ieee80211_reset_ap_probe(sdata);
f0706e82
JB		 3230}
3231
d91f36db
JB		 3232/*
3233 * This is the canonical list of information elements we care about,
3234 * the filter code also gives us all changes to the Microsoft OUI
c8d65917
SG		 3235 * (00:50:F2) vendor IE which is used for WMM which we need to track,
3236 * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3237 * changes to requested client power.
d91f36db
JB		 3238 *
3239 * We implement beacon filtering in software since that means we can
3240 * avoid processing the frame here and in cfg80211, and userspace
3241 * will not be able to tell whether the hardware supports it or not.
3242 *
3243 * XXX: This list needs to be dynamic -- userspace needs to be able to
3244 * add items it requires. It also needs to be able to tell us to
3245 * look out for other vendor IEs.
3246 */
3247static const u64 care_about_ies =
1d4df3a5
JB		 3248 (1ULL << WLAN_EID_COUNTRY) |
3249 (1ULL << WLAN_EID_ERP_INFO) |
3250 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
3251 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
3252 (1ULL << WLAN_EID_HT_CAPABILITY) |
70a3fd6c
JB		 3253 (1ULL << WLAN_EID_HT_OPERATION) |
3254 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN);
d91f36db 3255
8d61ffa5
JB		 3256static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
3257 struct ieee80211_mgmt *mgmt, size_t len,
3258 struct ieee80211_rx_status *rx_status)
f0706e82 3259{
d91f36db 3260 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 3261 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 3262 size_t baselen;
3263 struct ieee802_11_elems elems;
f698d856 3264 struct ieee80211_local *local = sdata->local;
55de908a
JB		 3265 struct ieee80211_chanctx_conf *chanctx_conf;
3266 struct ieee80211_channel *chan;
bee7f586 3267 struct sta_info *sta;
471b3efd 3268 u32 changed = 0;
f87ad637 3269 bool erp_valid;
7a5158ef 3270 u8 erp_value = 0;
d91f36db 3271 u32 ncrc;
77fdaa12 3272 u8 *bssid;
8d61ffa5 3273 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
77fdaa12 3274
8d61ffa5 3275 sdata_assert_lock(sdata);
f0706e82 3276
ae6a44e3
EK		 3277 /* Process beacon from the current BSS */
3278 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3279 if (baselen > len)
8d61ffa5 3280 return;
ae6a44e3 3281
55de908a
JB		 3282 rcu_read_lock();
3283 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3284 if (!chanctx_conf) {
3285 rcu_read_unlock();
8d61ffa5 3286 return;
55de908a
JB		 3287 }
3288
4bf88530 3289 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
55de908a 3290 rcu_read_unlock();
8d61ffa5 3291 return;
55de908a 3292 }
4bf88530 3293 chan = chanctx_conf->def.chan;
55de908a 3294 rcu_read_unlock();
f0706e82 3295
c65dd147 3296 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
b203ca39 3297 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
66e67e41 3298 ieee802_11_parse_elems(mgmt->u.beacon.variable,
b2e506bf 3299 len - baselen, false, &elems);
77fdaa12 3300
d45c4172 3301 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
482a9c74
AB		 3302 if (elems.tim && !elems.parse_error) {
3303 const struct ieee80211_tim_ie *tim_ie = elems.tim;
3304 ifmgd->dtim_period = tim_ie->dtim_period;
3305 }
989c6505 3306 ifmgd->have_beacon = true;
c65dd147 3307 ifmgd->assoc_data->need_beacon = false;
30686bf7 3308 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
ef429dad
JB		 3309 sdata->vif.bss_conf.sync_tsf =
3310 le64_to_cpu(mgmt->u.beacon.timestamp);
3311 sdata->vif.bss_conf.sync_device_ts =
3312 rx_status->device_timestamp;
3313 if (elems.tim)
3314 sdata->vif.bss_conf.sync_dtim_count =
3315 elems.tim->dtim_count;
3316 else
3317 sdata->vif.bss_conf.sync_dtim_count = 0;
3318 }
66e67e41
JB		 3319 /* continue assoc process */
3320 ifmgd->assoc_data->timeout = jiffies;
89afe614 3321 ifmgd->assoc_data->timeout_started = true;
8d61ffa5
JB		 3322 run_again(sdata, ifmgd->assoc_data->timeout);
3323 return;
66e67e41 3324 }
77fdaa12 3325
66e67e41 3326 if (!ifmgd->associated ||
b203ca39 3327 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
8d61ffa5 3328 return;
66e67e41 3329 bssid = ifmgd->associated->bssid;
f0706e82 3330
17e4ec14 3331 /* Track average RSSI from the Beacon frames of the current AP */
17e4ec14
JM		 3332 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3333 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
338c17ae 3334 ewma_beacon_signal_init(&ifmgd->ave_beacon_signal);
17e4ec14 3335 ifmgd->last_cqm_event_signal = 0;
391a200a 3336 ifmgd->count_beacon_signal = 1;
615f7b9b 3337 ifmgd->last_ave_beacon_signal = 0;
17e4ec14 3338 } else {
391a200a 3339 ifmgd->count_beacon_signal++;
17e4ec14 3340 }
615f7b9b 3341
338c17ae
JB		 3342 ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal);
3343
615f7b9b
MV		 3344 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3345 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
338c17ae 3346 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
615f7b9b 3347 int last_sig = ifmgd->last_ave_beacon_signal;
a8182929
EG		 3348 struct ieee80211_event event = {
3349 .type = RSSI_EVENT,
3350 };
615f7b9b
MV		 3351
3352 /*
3353 * if signal crosses either of the boundaries, invoke callback
3354 * with appropriate parameters
3355 */
3356 if (sig > ifmgd->rssi_max_thold &&
3357 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3358 ifmgd->last_ave_beacon_signal = sig;
a8182929
EG		 3359 event.u.rssi.data = RSSI_EVENT_HIGH;
3360 drv_event_callback(local, sdata, &event);
615f7b9b
MV		 3361 } else if (sig < ifmgd->rssi_min_thold &&
3362 (last_sig >= ifmgd->rssi_max_thold ||
3363 last_sig == 0)) {
3364 ifmgd->last_ave_beacon_signal = sig;
a8182929
EG		 3365 event.u.rssi.data = RSSI_EVENT_LOW;
3366 drv_event_callback(local, sdata, &event);
615f7b9b
MV		 3367 }
3368 }
3369
17e4ec14 3370 if (bss_conf->cqm_rssi_thold &&
391a200a 3371 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
ea086359 3372 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
338c17ae 3373 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
17e4ec14
JM		 3374 int last_event = ifmgd->last_cqm_event_signal;
3375 int thold = bss_conf->cqm_rssi_thold;
3376 int hyst = bss_conf->cqm_rssi_hyst;
338c17ae 3377
17e4ec14
JM		 3378 if (sig < thold &&
3379 (last_event == 0 || sig < last_event - hyst)) {
3380 ifmgd->last_cqm_event_signal = sig;
3381 ieee80211_cqm_rssi_notify(
3382 &sdata->vif,
3383 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3384 GFP_KERNEL);
3385 } else if (sig > thold &&
3386 (last_event == 0 || sig > last_event + hyst)) {
3387 ifmgd->last_cqm_event_signal = sig;
3388 ieee80211_cqm_rssi_notify(
3389 &sdata->vif,
3390 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3391 GFP_KERNEL);
3392 }
3393 }
3394
392b9ffb 3395 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
bdcbd8e0 3396 mlme_dbg_ratelimited(sdata,
112c31f0 3397 "cancelling AP probe due to a received beacon\n");
392b9ffb 3398 ieee80211_reset_ap_probe(sdata);
92778180
JM		 3399 }
3400
b291ba11
JB		 3401 /*
3402 * Push the beacon loss detection into the future since
3403 * we are processing a beacon from the AP just now.
3404 */
d3a910a8 3405 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 3406
d91f36db
JB		 3407 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3408 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
b2e506bf 3409 len - baselen, false, &elems,
d91f36db
JB		 3410 care_about_ies, ncrc);
3411
90d13e8f
JB		 3412 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
3413 ieee80211_check_tim(elems.tim, elems.tim_len, ifmgd->aid)) {
3414 if (local->hw.conf.dynamic_ps_timeout > 0) {
3415 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3416 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3417 ieee80211_hw_config(local,
3418 IEEE80211_CONF_CHANGE_PS);
572e0012 3419 }
076cdcb1 3420 ieee80211_send_nullfunc(local, sdata, false);
90d13e8f
JB		 3421 } else if (!local->pspolling && sdata->u.mgd.powersave) {
3422 local->pspolling = true;
3423
3424 /*
3425 * Here is assumed that the driver will be
3426 * able to send ps-poll frame and receive a
3427 * response even though power save mode is
3428 * enabled, but some drivers might require
3429 * to disable power save here. This needs
3430 * to be investigated.
3431 */
3432 ieee80211_send_pspoll(local, sdata);
a97b77b9
VN		 3433 }
3434 }
7a5158ef 3435
488dd7b5 3436 if (sdata->vif.p2p) {
67baf663 3437 struct ieee80211_p2p_noa_attr noa = {};
488dd7b5
JB		 3438 int ret;
3439
3440 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3441 len - baselen,
3442 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
934457ee 3443 (u8 *) &noa, sizeof(noa));
67baf663
JD		 3444 if (ret >= 2) {
3445 if (sdata->u.mgd.p2p_noa_index != noa.index) {
3446 /* valid noa_attr and index changed */
3447 sdata->u.mgd.p2p_noa_index = noa.index;
3448 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3449 changed |= BSS_CHANGED_P2P_PS;
3450 /*
3451 * make sure we update all information, the CRC
3452 * mechanism doesn't look at P2P attributes.
3453 */
3454 ifmgd->beacon_crc_valid = false;
3455 }
3456 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3457 /* noa_attr not found and we had valid noa_attr before */
3458 sdata->u.mgd.p2p_noa_index = -1;
3459 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
488dd7b5 3460 changed |= BSS_CHANGED_P2P_PS;
488dd7b5
JB		 3461 ifmgd->beacon_crc_valid = false;
3462 }
3463 }
3464
0c21e632
LC		 3465 if (ifmgd->csa_waiting_bcn)
3466 ieee80211_chswitch_post_beacon(sdata);
3467
2ecc3905
AB		 3468 /*
3469 * Update beacon timing and dtim count on every beacon appearance. This
3470 * will allow the driver to use the most updated values. Do it before
3471 * comparing this one with last received beacon.
3472 * IMPORTANT: These parameters would possibly be out of sync by the time
3473 * the driver will use them. The synchronized view is currently
3474 * guaranteed only in certain callbacks.
3475 */
30686bf7 3476 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
2ecc3905
AB		 3477 sdata->vif.bss_conf.sync_tsf =
3478 le64_to_cpu(mgmt->u.beacon.timestamp);
3479 sdata->vif.bss_conf.sync_device_ts =
3480 rx_status->device_timestamp;
3481 if (elems.tim)
3482 sdata->vif.bss_conf.sync_dtim_count =
3483 elems.tim->dtim_count;
3484 else
3485 sdata->vif.bss_conf.sync_dtim_count = 0;
3486 }
3487
d8ec4433 3488 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
8d61ffa5 3489 return;
30196673 3490 ifmgd->beacon_crc = ncrc;
d8ec4433 3491 ifmgd->beacon_crc_valid = true;
30196673 3492
d45c4172 3493 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
7d25745d 3494
d70b7616 3495 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
2ba45384 3496 rx_status->device_timestamp,
d70b7616
JB		 3497 &elems, true);
3498
095d81ce
JB		 3499 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3500 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
7d25745d
JB		 3501 elems.wmm_param_len))
3502 changed |= BSS_CHANGED_QOS;
3503
c65dd147
EG		 3504 /*
3505 * If we haven't had a beacon before, tell the driver about the
ef429dad 3506 * DTIM period (and beacon timing if desired) now.
c65dd147 3507 */
989c6505 3508 if (!ifmgd->have_beacon) {
c65dd147
EG		 3509 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3510 if (elems.tim)
3511 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3512 else
3513 bss_conf->dtim_period = 1;
ef429dad 3514
989c6505
AB		 3515 changed |= BSS_CHANGED_BEACON_INFO;
3516 ifmgd->have_beacon = true;
482a9c74
AB		 3517
3518 mutex_lock(&local->iflist_mtx);
4a733ef1 3519 ieee80211_recalc_ps(local);
482a9c74
AB		 3520 mutex_unlock(&local->iflist_mtx);
3521
ce857888 3522 ieee80211_recalc_ps_vif(sdata);
c65dd147
EG		 3523 }
3524
1946bed9 3525 if (elems.erp_info) {
7a5158ef
JB		 3526 erp_valid = true;
3527 erp_value = elems.erp_info[0];
3528 } else {
3529 erp_valid = false;
50c4afb9 3530 }
7a5158ef
JB		 3531 changed |= ieee80211_handle_bss_capability(sdata,
3532 le16_to_cpu(mgmt->u.beacon.capab_info),
3533 erp_valid, erp_value);
f0706e82 3534
1128958d 3535 mutex_lock(&local->sta_mtx);
bee7f586
JB		 3536 sta = sta_info_get(sdata, bssid);
3537
53b954ee
EP		 3538 if (ieee80211_config_bw(sdata, sta,
3539 elems.ht_cap_elem, elems.ht_operation,
30eb1dc2
JB		 3540 elems.vht_operation, bssid, &changed)) {
3541 mutex_unlock(&local->sta_mtx);
3542 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3543 WLAN_REASON_DEAUTH_LEAVING,
3544 true, deauth_buf);
a90faa9d
EG		 3545 ieee80211_report_disconnect(sdata, deauth_buf,
3546 sizeof(deauth_buf), true,
3547 WLAN_REASON_DEAUTH_LEAVING);
8d61ffa5 3548 return;
30eb1dc2 3549 }
bee7f586
JB		 3550
3551 if (sta && elems.opmode_notif)
3552 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3553 rx_status->band, true);
1128958d 3554 mutex_unlock(&local->sta_mtx);
d3c990fb 3555
24a4e400
SG		 3556 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
3557 elems.country_elem,
3558 elems.country_elem_len,
c8d65917
SG		 3559 elems.pwr_constr_elem,
3560 elems.cisco_dtpc_elem);
3f2355cb 3561
471b3efd 3562 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 3563}
3564
1fa57d01
JB		 3565void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3566 struct sk_buff *skb)
f0706e82
JB		 3567{
3568 struct ieee80211_rx_status *rx_status;
f0706e82
JB		 3569 struct ieee80211_mgmt *mgmt;
3570 u16 fc;
1b3a2e49
JB		 3571 struct ieee802_11_elems elems;
3572 int ies_len;
f0706e82 3573
f0706e82
JB		 3574 rx_status = (struct ieee80211_rx_status *) skb->cb;
3575 mgmt = (struct ieee80211_mgmt *) skb->data;
3576 fc = le16_to_cpu(mgmt->frame_control);
3577
8d61ffa5 3578 sdata_lock(sdata);
77fdaa12 3579
66e67e41
JB		 3580 switch (fc & IEEE80211_FCTL_STYPE) {
3581 case IEEE80211_STYPE_BEACON:
8d61ffa5 3582 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
66e67e41
JB		 3583 break;
3584 case IEEE80211_STYPE_PROBE_RESP:
3585 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3586 break;
3587 case IEEE80211_STYPE_AUTH:
8d61ffa5 3588 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
66e67e41
JB		 3589 break;
3590 case IEEE80211_STYPE_DEAUTH:
8d61ffa5 3591 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
66e67e41
JB		 3592 break;
3593 case IEEE80211_STYPE_DISASSOC:
8d61ffa5 3594 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
66e67e41
JB		 3595 break;
3596 case IEEE80211_STYPE_ASSOC_RESP:
3597 case IEEE80211_STYPE_REASSOC_RESP:
8d61ffa5 3598 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
66e67e41
JB		 3599 break;
3600 case IEEE80211_STYPE_ACTION:
37799e52 3601 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
1b3a2e49
JB		 3602 ies_len = skb->len -
3603 offsetof(struct ieee80211_mgmt,
3604 u.action.u.chan_switch.variable);
37799e52
JB		 3605
3606 if (ies_len < 0)
3607 break;
3608
3609 ieee802_11_parse_elems(
3610 mgmt->u.action.u.chan_switch.variable,
b2e506bf 3611 ies_len, true, &elems);
37799e52
JB		 3612
3613 if (elems.parse_error)
3614 break;
3615
1b3a2e49 3616 ieee80211_sta_process_chanswitch(sdata,
2ba45384
LC		 3617 rx_status->mactime,
3618 rx_status->device_timestamp,
3619 &elems, false);
1b3a2e49
JB		 3620 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3621 ies_len = skb->len -
3622 offsetof(struct ieee80211_mgmt,
3623 u.action.u.ext_chan_switch.variable);
3624
3625 if (ies_len < 0)
3626 break;
3627
3628 ieee802_11_parse_elems(
3629 mgmt->u.action.u.ext_chan_switch.variable,
b2e506bf 3630 ies_len, true, &elems);
1b3a2e49
JB		 3631
3632 if (elems.parse_error)
3633 break;
3634
3635 /* for the handling code pretend this was also an IE */
3636 elems.ext_chansw_ie =
3637 &mgmt->u.action.u.ext_chan_switch.data;
3638
66e67e41 3639 ieee80211_sta_process_chanswitch(sdata,
2ba45384
LC		 3640 rx_status->mactime,
3641 rx_status->device_timestamp,
3642 &elems, false);
77fdaa12 3643 }
37799e52 3644 break;
77fdaa12 3645 }
8d61ffa5 3646 sdata_unlock(sdata);
f0706e82
JB		 3647}
3648
9c6bd790 3649static void ieee80211_sta_timer(unsigned long data)
f0706e82 3650{
60f8b39c
JB		 3651 struct ieee80211_sub_if_data *sdata =
3652 (struct ieee80211_sub_if_data *) data;
5bb644a0 3653
9b7d72c1 3654 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
f0706e82
JB		 3655}
3656
04ac3c0e 3657static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
6b684db1 3658 u8 *bssid, u8 reason, bool tx)
04ac3c0e 3659{
6ae16775 3660 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
04ac3c0e 3661
37ad3888 3662 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
6b684db1 3663 tx, frame_buf);
37ad3888 3664
a90faa9d
EG		 3665 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
3666 reason);
04ac3c0e
FF		 3667}
3668
46cad4b7 3669static int ieee80211_auth(struct ieee80211_sub_if_data *sdata)
66e67e41
JB		 3670{
3671 struct ieee80211_local *local = sdata->local;
3672 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3673 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
1672c0e3 3674 u32 tx_flags = 0;
46cad4b7
JB		 3675 u16 trans = 1;
3676 u16 status = 0;
66e67e41 3677
8d61ffa5 3678 sdata_assert_lock(sdata);
66e67e41
JB		 3679
3680 if (WARN_ON_ONCE(!auth_data))
3681 return -EINVAL;
3682
66e67e41
JB		 3683 auth_data->tries++;
3684
3685 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
bdcbd8e0
JB		 3686 sdata_info(sdata, "authentication with %pM timed out\n",
3687 auth_data->bss->bssid);
66e67e41
JB		 3688
3689 /*
3690 * Most likely AP is not in the range so remove the
3691 * bss struct for that AP.
3692 */
3693 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3694
3695 return -ETIMEDOUT;
3696 }
3697
a1845fc7
JB		 3698 drv_mgd_prepare_tx(local, sdata);
3699
46cad4b7
JB		 3700 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3701 auth_data->bss->bssid, auth_data->tries,
3702 IEEE80211_AUTH_MAX_TRIES);
66e67e41 3703
46cad4b7 3704 auth_data->expected_transaction = 2;
6b8ece3a 3705
46cad4b7
JB		 3706 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3707 trans = auth_data->sae_trans;
3708 status = auth_data->sae_status;
3709 auth_data->expected_transaction = trans;
3710 }
66e67e41 3711
46cad4b7
JB		 3712 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
3713 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3714 IEEE80211_TX_INTFL_MLME_CONN_TX;
66e67e41 3715
46cad4b7
JB		 3716 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3717 auth_data->data, auth_data->data_len,
3718 auth_data->bss->bssid,
3719 auth_data->bss->bssid, NULL, 0, 0,
3720 tx_flags);
66e67e41 3721
6211dd12 3722 if (tx_flags == 0) {
1672c0e3 3723 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
cb236d2d 3724 auth_data->timeout_started = true;
8d61ffa5 3725 run_again(sdata, auth_data->timeout);
89afe614 3726 } else {
cb236d2d
JB		 3727 auth_data->timeout =
3728 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3729 auth_data->timeout_started = true;
3730 run_again(sdata, auth_data->timeout);
1672c0e3 3731 }
66e67e41
JB		 3732
3733 return 0;
3734}
3735
3736static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3737{
3738 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3739 struct ieee80211_local *local = sdata->local;
3740
8d61ffa5 3741 sdata_assert_lock(sdata);
66e67e41 3742
66e67e41
JB		 3743 assoc_data->tries++;
3744 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
bdcbd8e0
JB		 3745 sdata_info(sdata, "association with %pM timed out\n",
3746 assoc_data->bss->bssid);
66e67e41
JB		 3747
3748 /*
3749 * Most likely AP is not in the range so remove the
3750 * bss struct for that AP.
3751 */
3752 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3753
3754 return -ETIMEDOUT;
3755 }
3756
bdcbd8e0
JB		 3757 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3758 assoc_data->bss->bssid, assoc_data->tries,
3759 IEEE80211_ASSOC_MAX_TRIES);
66e67e41
JB		 3760 ieee80211_send_assoc(sdata);
3761
30686bf7 3762 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
1672c0e3 3763 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
89afe614 3764 assoc_data->timeout_started = true;
8d61ffa5 3765 run_again(sdata, assoc_data->timeout);
89afe614 3766 } else {
cb236d2d
JB		 3767 assoc_data->timeout =
3768 round_jiffies_up(jiffies +
3769 IEEE80211_ASSOC_TIMEOUT_LONG);
3770 assoc_data->timeout_started = true;
3771 run_again(sdata, assoc_data->timeout);
1672c0e3 3772 }
66e67e41
JB		 3773
3774 return 0;
3775}
3776
1672c0e3
JB		 3777void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3778 __le16 fc, bool acked)
3779{
3780 struct ieee80211_local *local = sdata->local;
3781
3782 sdata->u.mgd.status_fc = fc;
3783 sdata->u.mgd.status_acked = acked;
3784 sdata->u.mgd.status_received = true;
3785
3786 ieee80211_queue_work(&local->hw, &sdata->work);
3787}
3788
1fa57d01 3789void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 3790{
9c6bd790 3791 struct ieee80211_local *local = sdata->local;
1fa57d01 3792 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 3793
8d61ffa5 3794 sdata_lock(sdata);
77fdaa12 3795
1672c0e3
JB		 3796 if (ifmgd->status_received) {
3797 __le16 fc = ifmgd->status_fc;
3798 bool status_acked = ifmgd->status_acked;
3799
3800 ifmgd->status_received = false;
46cad4b7 3801 if (ifmgd->auth_data && ieee80211_is_auth(fc)) {
1672c0e3
JB		 3802 if (status_acked) {
3803 ifmgd->auth_data->timeout =
3804 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
8d61ffa5 3805 run_again(sdata, ifmgd->auth_data->timeout);
1672c0e3
JB		 3806 } else {
3807 ifmgd->auth_data->timeout = jiffies - 1;
3808 }
89afe614 3809 ifmgd->auth_data->timeout_started = true;
1672c0e3
JB		 3810 } else if (ifmgd->assoc_data &&
3811 (ieee80211_is_assoc_req(fc) ||
3812 ieee80211_is_reassoc_req(fc))) {
3813 if (status_acked) {
3814 ifmgd->assoc_data->timeout =
3815 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
8d61ffa5 3816 run_again(sdata, ifmgd->assoc_data->timeout);
1672c0e3
JB		 3817 } else {
3818 ifmgd->assoc_data->timeout = jiffies - 1;
3819 }
89afe614 3820 ifmgd->assoc_data->timeout_started = true;
1672c0e3
JB		 3821 }
3822 }
3823
89afe614 3824 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
66e67e41
JB		 3825 time_after(jiffies, ifmgd->auth_data->timeout)) {
3826 if (ifmgd->auth_data->done) {
3827 /*
3828 * ok ... we waited for assoc but userspace didn't,
3829 * so let's just kill the auth data
3830 */
3831 ieee80211_destroy_auth_data(sdata, false);
46cad4b7 3832 } else if (ieee80211_auth(sdata)) {
66e67e41 3833 u8 bssid[ETH_ALEN];
a9409093
EG		 3834 struct ieee80211_event event = {
3835 .type = MLME_EVENT,
3836 .u.mlme.data = AUTH_EVENT,
3837 .u.mlme.status = MLME_TIMEOUT,
3838 };
66e67e41
JB		 3839
3840 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3841
3842 ieee80211_destroy_auth_data(sdata, false);
3843
6ff57cf8 3844 cfg80211_auth_timeout(sdata->dev, bssid);
a9409093 3845 drv_event_callback(sdata->local, sdata, &event);
66e67e41 3846 }
89afe614 3847 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
8d61ffa5 3848 run_again(sdata, ifmgd->auth_data->timeout);
66e67e41 3849
89afe614 3850 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
66e67e41 3851 time_after(jiffies, ifmgd->assoc_data->timeout)) {
989c6505 3852 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
66e67e41 3853 ieee80211_do_assoc(sdata)) {
959867fa 3854 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
d0d1a12f
EG		 3855 struct ieee80211_event event = {
3856 .type = MLME_EVENT,
3857 .u.mlme.data = ASSOC_EVENT,
3858 .u.mlme.status = MLME_TIMEOUT,
3859 };
66e67e41
JB		 3860
3861 ieee80211_destroy_assoc_data(sdata, false);
959867fa 3862 cfg80211_assoc_timeout(sdata->dev, bss);
d0d1a12f 3863 drv_event_callback(sdata->local, sdata, &event);
66e67e41 3864 }
89afe614 3865 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
8d61ffa5 3866 run_again(sdata, ifmgd->assoc_data->timeout);
66e67e41 3867
392b9ffb 3868 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
b291ba11 3869 ifmgd->associated) {
a43abf29 3870 u8 bssid[ETH_ALEN];
72a8a3ed 3871 int max_tries;
a43abf29 3872
0c1ad2ca 3873 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 3874
30686bf7 3875 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
180205bd 3876 max_tries = max_nullfunc_tries;
72a8a3ed 3877 else
180205bd 3878 max_tries = max_probe_tries;
72a8a3ed 3879
4e5ff376
FF		 3880 /* ACK received for nullfunc probing frame */
3881 if (!ifmgd->probe_send_count)
3882 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 3883 else if (ifmgd->nullfunc_failed) {
3884 if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3885 mlme_dbg(sdata,
3886 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3887 bssid, ifmgd->probe_send_count,
3888 max_tries);
04ac3c0e
FF		 3889 ieee80211_mgd_probe_ap_send(sdata);
3890 } else {
bdcbd8e0
JB		 3891 mlme_dbg(sdata,
3892 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3893 bssid);
95acac61 3894 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1
JB		 3895 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3896 false);
04ac3c0e
FF		 3897 }
3898 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
8d61ffa5 3899 run_again(sdata, ifmgd->probe_timeout);
30686bf7 3900 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
bdcbd8e0
JB		 3901 mlme_dbg(sdata,
3902 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3903 bssid, probe_wait_ms);
95acac61 3904 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 3905 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
04ac3c0e 3906 } else if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3907 mlme_dbg(sdata,
3908 "No probe response from AP %pM after %dms, try %d/%i\n",
3909 bssid, probe_wait_ms,
3910 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 3911 ieee80211_mgd_probe_ap_send(sdata);
3912 } else {
b291ba11
JB		 3913 /*
3914 * We actually lost the connection ... or did we?
3915 * Let's make sure!
3916 */
b38afa87
BG		 3917 wiphy_debug(local->hw.wiphy,
3918 "%s: No probe response from AP %pM"
3919 " after %dms, disconnecting.\n",
3920 sdata->name,
180205bd 3921 bssid, probe_wait_ms);
04ac3c0e 3922
95acac61 3923 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 3924 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
b291ba11
JB		 3925 }
3926 }
3927
8d61ffa5 3928 sdata_unlock(sdata);
f0706e82
JB		 3929}
3930
b291ba11
JB		 3931static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3932{
3933 struct ieee80211_sub_if_data *sdata =
3934 (struct ieee80211_sub_if_data *) data;
0c21e632 3935 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 3936
0c21e632 3937 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
e5593f56
MK		 3938 return;
3939
682bd38b 3940 sdata->u.mgd.connection_loss = false;
1e4dcd01
JO		 3941 ieee80211_queue_work(&sdata->local->hw,
3942 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 3943}
3944
3945static void ieee80211_sta_conn_mon_timer(unsigned long data)
3946{
3947 struct ieee80211_sub_if_data *sdata =
3948 (struct ieee80211_sub_if_data *) data;
3949 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3950 struct ieee80211_local *local = sdata->local;
3951
0c21e632 3952 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
e5593f56
MK		 3953 return;
3954
42935eca 3955 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 3956}
3957
3958static void ieee80211_sta_monitor_work(struct work_struct *work)
3959{
3960 struct ieee80211_sub_if_data *sdata =
3961 container_of(work, struct ieee80211_sub_if_data,
3962 u.mgd.monitor_work);
3963
3964 ieee80211_mgd_probe_ap(sdata, false);
3965}
3966
9c6bd790
JB		 3967static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3968{
ad935687 3969 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
925e64c3 3970 __ieee80211_stop_poll(sdata);
ad935687 3971
b291ba11 3972 /* let's probe the connection once */
30686bf7 3973 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
494f1fe5
EP		 3974 ieee80211_queue_work(&sdata->local->hw,
3975 &sdata->u.mgd.monitor_work);
b291ba11 3976 /* and do all the other regular work too */
64592c8f 3977 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 3978 }
9c6bd790 3979}
f0706e82 3980
b8360ab8 3981#ifdef CONFIG_PM
1a1cb744
JB		 3982void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
3983{
3984 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3985 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3986
3987 sdata_lock(sdata);
3988
c52666ae
EG		 3989 if (ifmgd->auth_data || ifmgd->assoc_data) {
3990 const u8 *bssid = ifmgd->auth_data ?
3991 ifmgd->auth_data->bss->bssid :
3992 ifmgd->assoc_data->bss->bssid;
3993
1a1cb744 3994 /*
c52666ae
EG		 3995 * If we are trying to authenticate / associate while suspending,
3996 * cfg80211 won't know and won't actually abort those attempts,
3997 * thus we need to do that ourselves.
1a1cb744 3998 */
c52666ae 3999 ieee80211_send_deauth_disassoc(sdata, bssid,
1a1cb744
JB		 4000 IEEE80211_STYPE_DEAUTH,
4001 WLAN_REASON_DEAUTH_LEAVING,
4002 false, frame_buf);
c52666ae
EG		 4003 if (ifmgd->assoc_data)
4004 ieee80211_destroy_assoc_data(sdata, false);
4005 if (ifmgd->auth_data)
4006 ieee80211_destroy_auth_data(sdata, false);
1a1cb744
JB		 4007 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4008 IEEE80211_DEAUTH_FRAME_LEN);
4009 }
4010
be72afe0
JB		 4011 /* This is a bit of a hack - we should find a better and more generic
4012 * solution to this. Normally when suspending, cfg80211 will in fact
4013 * deauthenticate. However, it doesn't (and cannot) stop an ongoing
4014 * auth (not so important) or assoc (this is the problem) process.
4015 *
4016 * As a consequence, it can happen that we are in the process of both
4017 * associating and suspending, and receive an association response
4018 * after cfg80211 has checked if it needs to disconnect, but before
4019 * we actually set the flag to drop incoming frames. This will then
4020 * cause the workqueue flush to process the association response in
4021 * the suspend, resulting in a successful association just before it
4022 * tries to remove the interface from the driver, which now though
4023 * has a channel context assigned ... this results in issues.
4024 *
4025 * To work around this (for now) simply deauth here again if we're
4026 * now connected.
4027 */
4028 if (ifmgd->associated && !sdata->local->wowlan) {
4029 u8 bssid[ETH_ALEN];
4030 struct cfg80211_deauth_request req = {
4031 .reason_code = WLAN_REASON_DEAUTH_LEAVING,
4032 .bssid = bssid,
4033 };
4034
4035 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4036 ieee80211_mgd_deauth(sdata, &req);
4037 }
4038
1a1cb744
JB		 4039 sdata_unlock(sdata);
4040}
4041
b8360ab8
JB		 4042void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
4043{
4044 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4045
8d61ffa5 4046 sdata_lock(sdata);
b8360ab8 4047 if (!ifmgd->associated) {
8d61ffa5 4048 sdata_unlock(sdata);
b8360ab8
JB		 4049 return;
4050 }
4051
4052 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
4053 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
4054 mlme_dbg(sdata, "driver requested disconnect after resume\n");
4055 ieee80211_sta_connection_lost(sdata,
4056 ifmgd->associated->bssid,
4057 WLAN_REASON_UNSPECIFIED,
4058 true);
8d61ffa5 4059 sdata_unlock(sdata);
b8360ab8
JB		 4060 return;
4061 }
8d61ffa5 4062 sdata_unlock(sdata);
b8360ab8
JB		 4063}
4064#endif
4065
9c6bd790
JB		 4066/* interface setup */
4067void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 4068{
46900298 4069 struct ieee80211_if_managed *ifmgd;
988c0f72 4070
46900298 4071 ifmgd = &sdata->u.mgd;
b291ba11 4072 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 4073 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 4074 INIT_WORK(&ifmgd->beacon_connection_loss_work,
4075 ieee80211_beacon_connection_loss_work);
882a7c69
JB		 4076 INIT_WORK(&ifmgd->csa_connection_drop_work,
4077 ieee80211_csa_connection_drop_work);
687da132 4078 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
81dd2b88
AN		 4079 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
4080 ieee80211_tdls_peer_del_work);
46900298 4081 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 4082 (unsigned long) sdata);
b291ba11
JB		 4083 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
4084 (unsigned long) sdata);
4085 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
4086 (unsigned long) sdata);
46900298 4087 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 4088 (unsigned long) sdata);
02219b3a
JB		 4089 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
4090 ieee80211_sta_handle_tspec_ac_params_wk);
9c6bd790 4091
ab1faead 4092 ifmgd->flags = 0;
1478acb3 4093 ifmgd->powersave = sdata->wdev.ps;
219c3867
AB		 4094 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
4095 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
67baf663 4096 ifmgd->p2p_noa_index = -1;
bbbdff9e 4097
0d8614b4 4098 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
0f78231b
JB		 4099 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
4100 else
4101 ifmgd->req_smps = IEEE80211_SMPS_OFF;
1277b4a9
LK		 4102
4103 /* Setup TDLS data */
4104 spin_lock_init(&ifmgd->teardown_lock);
4105 ifmgd->teardown_skb = NULL;
4106 ifmgd->orig_teardown_skb = NULL;
f0706e82
JB		 4107}
4108
77fdaa12
JB		 4109/* scan finished notification */
4110void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 4111{
31ee67a1 4112 struct ieee80211_sub_if_data *sdata;
60f8b39c 4113
77fdaa12
JB		 4114 /* Restart STA timers */
4115 rcu_read_lock();
370bd005
BG		 4116 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4117 if (ieee80211_sdata_running(sdata))
4118 ieee80211_restart_sta_timer(sdata);
4119 }
77fdaa12
JB		 4120 rcu_read_unlock();
4121}
60f8b39c 4122
f2d9d270
JB		 4123static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
4124 struct cfg80211_bss *cbss)
4125{
4126 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4127 const u8 *ht_cap_ie, *vht_cap_ie;
4128 const struct ieee80211_ht_cap *ht_cap;
4129 const struct ieee80211_vht_cap *vht_cap;
4130 u8 chains = 1;
4131
4132 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
4133 return chains;
4134
9caf0364 4135 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
f2d9d270
JB		 4136 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
4137 ht_cap = (void *)(ht_cap_ie + 2);
4138 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4139 /*
4140 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4141 * "Tx Unequal Modulation Supported" fields.
4142 */
4143 }
4144
4145 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
4146 return chains;
4147
9caf0364 4148 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
f2d9d270
JB		 4149 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
4150 u8 nss;
4151 u16 tx_mcs_map;
4152
4153 vht_cap = (void *)(vht_cap_ie + 2);
4154 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4155 for (nss = 8; nss > 0; nss--) {
4156 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4157 IEEE80211_VHT_MCS_NOT_SUPPORTED)
4158 break;
4159 }
4160 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4161 chains = max(chains, nss);
4162 }
4163
4164 return chains;
4165}
4166
b17166a7
JB		 4167static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4168 struct cfg80211_bss *cbss)
a1cf775d
JB		 4169{
4170 struct ieee80211_local *local = sdata->local;
4171 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
53b954ee 4172 const struct ieee80211_ht_cap *ht_cap = NULL;
24398e39 4173 const struct ieee80211_ht_operation *ht_oper = NULL;
f2d9d270 4174 const struct ieee80211_vht_operation *vht_oper = NULL;
24398e39 4175 struct ieee80211_supported_band *sband;
4bf88530 4176 struct cfg80211_chan_def chandef;
f2d9d270 4177 int ret;
52a45f38
AN		 4178 u32 i;
4179 bool have_80mhz;
a1cf775d 4180
24398e39
JB		 4181 sband = local->hw.wiphy->bands[cbss->channel->band];
4182
f2d9d270
JB		 4183 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
4184 IEEE80211_STA_DISABLE_80P80MHZ |
4185 IEEE80211_STA_DISABLE_160MHZ);
4186
9caf0364
JB		 4187 rcu_read_lock();
4188
f2d9d270
JB		 4189 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
4190 sband->ht_cap.ht_supported) {
53b954ee 4191 const u8 *ht_oper_ie, *ht_cap_ie;
24398e39 4192
9caf0364 4193 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
24398e39
JB		 4194 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
4195 ht_oper = (void *)(ht_oper_ie + 2);
08e6effa 4196
53b954ee
EP		 4197 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4198 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
4199 ht_cap = (void *)(ht_cap_ie + 2);
4200
4201 if (!ht_cap) {
08e6effa
JB		 4202 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4203 ht_oper = NULL;
4204 }
24398e39
JB		 4205 }
4206
f2d9d270
JB		 4207 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4208 sband->vht_cap.vht_supported) {
08e6effa 4209 const u8 *vht_oper_ie, *vht_cap;
f2d9d270 4210
9caf0364
JB		 4211 vht_oper_ie = ieee80211_bss_get_ie(cbss,
4212 WLAN_EID_VHT_OPERATION);
f2d9d270
JB		 4213 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
4214 vht_oper = (void *)(vht_oper_ie + 2);
4215 if (vht_oper && !ht_oper) {
4216 vht_oper = NULL;
bdcbd8e0 4217 sdata_info(sdata,
f2d9d270 4218 "AP advertised VHT without HT, disabling both\n");
cb145022
JB		 4219 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4220 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
24398e39 4221 }
08e6effa
JB		 4222
4223 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4224 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
4225 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4226 vht_oper = NULL;
4227 }
24398e39
JB		 4228 }
4229
52a45f38
AN		 4230 /* Allow VHT if at least one channel on the sband supports 80 MHz */
4231 have_80mhz = false;
4232 for (i = 0; i < sband->n_channels; i++) {
4233 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
4234 IEEE80211_CHAN_NO_80MHZ))
4235 continue;
4236
4237 have_80mhz = true;
4238 break;
4239 }
4240
4241 if (!have_80mhz)
4242 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4243
f2d9d270
JB		 4244 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
4245 cbss->channel,
53b954ee 4246 ht_cap, ht_oper, vht_oper,
5cdaed1e 4247 &chandef, false);
04ecd257 4248
f2d9d270
JB		 4249 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
4250 local->rx_chains);
24398e39 4251
9caf0364
JB		 4252 rcu_read_unlock();
4253
04ecd257
JB		 4254 /* will change later if needed */
4255 sdata->smps_mode = IEEE80211_SMPS_OFF;
4256
34a3740d 4257 mutex_lock(&local->mtx);
f2d9d270
JB		 4258 /*
4259 * If this fails (possibly due to channel context sharing
4260 * on incompatible channels, e.g. 80+80 and 160 sharing the
4261 * same control channel) try to use a smaller bandwidth.
4262 */
4263 ret = ieee80211_vif_use_channel(sdata, &chandef,
4264 IEEE80211_CHANCTX_SHARED);
0418a445
SW		 4265
4266 /* don't downgrade for 5 and 10 MHz channels, though. */
4267 if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4268 chandef.width == NL80211_CHAN_WIDTH_10)
34a3740d 4269 goto out;
0418a445 4270
d601cd8d 4271 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
e6b7cde4 4272 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
d601cd8d
JB		 4273 ret = ieee80211_vif_use_channel(sdata, &chandef,
4274 IEEE80211_CHANCTX_SHARED);
4275 }
34a3740d
JB		 4276 out:
4277 mutex_unlock(&local->mtx);
f2d9d270 4278 return ret;
b17166a7
JB		 4279}
4280
4281static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
c1041f10
CRI		 4282 struct cfg80211_bss *cbss, bool assoc,
4283 bool override)
b17166a7
JB		 4284{
4285 struct ieee80211_local *local = sdata->local;
4286 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4287 struct ieee80211_bss *bss = (void *)cbss->priv;
4288 struct sta_info *new_sta = NULL;
179b8fc7 4289 struct ieee80211_supported_band *sband;
c1041f10 4290 bool have_sta = false;
b17166a7
JB		 4291 int err;
4292
179b8fc7
CRI		 4293 sband = local->hw.wiphy->bands[cbss->channel->band];
4294
b17166a7
JB		 4295 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
4296 return -EINVAL;
4297
4298 if (assoc) {
4299 rcu_read_lock();
4300 have_sta = sta_info_get(sdata, cbss->bssid);
4301 rcu_read_unlock();
4302 }
4303
4304 if (!have_sta) {
4305 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4306 if (!new_sta)
4307 return -ENOMEM;
4308 }
179b8fc7 4309
c1041f10 4310 if (new_sta || override) {
179b8fc7
CRI		 4311 err = ieee80211_prep_channel(sdata, cbss);
4312 if (err) {
4313 if (new_sta)
4314 sta_info_free(local, new_sta);
4315 return -EINVAL;
4316 }
4317 }
4318
13e0c8e3 4319 if (new_sta) {
5d6a1b06
JB		 4320 u32 rates = 0, basic_rates = 0;
4321 bool have_higher_than_11mbit;
4322 int min_rate = INT_MAX, min_rate_index = -1;
2103dec1 4323 struct ieee80211_chanctx_conf *chanctx_conf;
8cef2c9d 4324 const struct cfg80211_bss_ies *ies;
179b8fc7 4325 int shift = ieee80211_vif_get_shift(&sdata->vif);
2103dec1 4326 u32 rate_flags;
b17166a7 4327
2103dec1
SW		 4328 rcu_read_lock();
4329 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4330 if (WARN_ON(!chanctx_conf)) {
4331 rcu_read_unlock();
c368ddaa 4332 sta_info_free(local, new_sta);
2103dec1
SW		 4333 return -EINVAL;
4334 }
4335 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
4336 rcu_read_unlock();
5d6a1b06 4337
5d6a1b06
JB		 4338 ieee80211_get_rates(sband, bss->supp_rates,
4339 bss->supp_rates_len,
4340 &rates, &basic_rates,
4341 &have_higher_than_11mbit,
2103dec1
SW		 4342 &min_rate, &min_rate_index,
4343 shift, rate_flags);
5d6a1b06
JB		 4344
4345 /*
4346 * This used to be a workaround for basic rates missing
4347 * in the association response frame. Now that we no
4348 * longer use the basic rates from there, it probably
4349 * doesn't happen any more, but keep the workaround so
4350 * in case some *other* APs are buggy in different ways
4351 * we can connect -- with a warning.
4352 */
4353 if (!basic_rates && min_rate_index >= 0) {
bdcbd8e0
JB		 4354 sdata_info(sdata,
4355 "No basic rates, using min rate instead\n");
5d6a1b06
JB		 4356 basic_rates = BIT(min_rate_index);
4357 }
4358
13e0c8e3 4359 new_sta->sta.supp_rates[cbss->channel->band] = rates;
5d6a1b06
JB		 4360 sdata->vif.bss_conf.basic_rates = basic_rates;
4361
4362 /* cf. IEEE 802.11 9.2.12 */
55de908a 4363 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
5d6a1b06
JB		 4364 have_higher_than_11mbit)
4365 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
4366 else
4367 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
4368
4369 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
4370
8c358bcd
JB		 4371 /* set timing information */
4372 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
8cef2c9d 4373 rcu_read_lock();
ef429dad
JB		 4374 ies = rcu_dereference(cbss->beacon_ies);
4375 if (ies) {
4376 const u8 *tim_ie;
4377
4378 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4379 sdata->vif.bss_conf.sync_device_ts =
4380 bss->device_ts_beacon;
4381 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4382 ies->data, ies->len);
4383 if (tim_ie && tim_ie[1] >= 2)
4384 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
4385 else
4386 sdata->vif.bss_conf.sync_dtim_count = 0;
30686bf7
JB		 4387 } else if (!ieee80211_hw_check(&sdata->local->hw,
4388 TIMING_BEACON_ONLY)) {
ef429dad
JB		 4389 ies = rcu_dereference(cbss->proberesp_ies);
4390 /* must be non-NULL since beacon IEs were NULL */
4391 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4392 sdata->vif.bss_conf.sync_device_ts =
4393 bss->device_ts_presp;
4394 sdata->vif.bss_conf.sync_dtim_count = 0;
4395 } else {
4396 sdata->vif.bss_conf.sync_tsf = 0;
4397 sdata->vif.bss_conf.sync_device_ts = 0;
4398 sdata->vif.bss_conf.sync_dtim_count = 0;
4399 }
8cef2c9d 4400 rcu_read_unlock();
8c358bcd
JB		 4401
4402 /* tell driver about BSSID, basic rates and timing */
5d6a1b06 4403 ieee80211_bss_info_change_notify(sdata,
8c358bcd
JB		 4404 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4405 BSS_CHANGED_BEACON_INT);
a1cf775d
JB		 4406
4407 if (assoc)
13e0c8e3 4408 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
a1cf775d 4409
13e0c8e3
JB		 4410 err = sta_info_insert(new_sta);
4411 new_sta = NULL;
a1cf775d 4412 if (err) {
bdcbd8e0
JB		 4413 sdata_info(sdata,
4414 "failed to insert STA entry for the AP (error %d)\n",
4415 err);
a1cf775d
JB		 4416 return err;
4417 }
4418 } else
b203ca39 4419 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
a1cf775d 4420
7d830a19
DS		 4421 /* Cancel scan to ensure that nothing interferes with connection */
4422 if (local->scanning)
4423 ieee80211_scan_cancel(local);
4424
a1cf775d
JB		 4425 return 0;
4426}
4427
77fdaa12
JB		 4428/* config hooks */
4429int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4430 struct cfg80211_auth_request *req)
9c6bd790 4431{
66e67e41
JB		 4432 struct ieee80211_local *local = sdata->local;
4433 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4434 struct ieee80211_mgd_auth_data *auth_data;
77fdaa12 4435 u16 auth_alg;
66e67e41
JB		 4436 int err;
4437
4438 /* prepare auth data structure */
9c6bd790 4439
77fdaa12
JB		 4440 switch (req->auth_type) {
4441 case NL80211_AUTHTYPE_OPEN_SYSTEM:
4442 auth_alg = WLAN_AUTH_OPEN;
4443 break;
4444 case NL80211_AUTHTYPE_SHARED_KEY:
66e67e41 4445 if (IS_ERR(local->wep_tx_tfm))
9dca9c49 4446 return -EOPNOTSUPP;
77fdaa12
JB		 4447 auth_alg = WLAN_AUTH_SHARED_KEY;
4448 break;
4449 case NL80211_AUTHTYPE_FT:
4450 auth_alg = WLAN_AUTH_FT;
4451 break;
4452 case NL80211_AUTHTYPE_NETWORK_EAP:
4453 auth_alg = WLAN_AUTH_LEAP;
4454 break;
6b8ece3a
JM		 4455 case NL80211_AUTHTYPE_SAE:
4456 auth_alg = WLAN_AUTH_SAE;
4457 break;
77fdaa12
JB		 4458 default:
4459 return -EOPNOTSUPP;
60f8b39c 4460 }
77fdaa12 4461
6b8ece3a
JM		 4462 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
4463 req->ie_len, GFP_KERNEL);
66e67e41 4464 if (!auth_data)
9c6bd790 4465 return -ENOMEM;
77fdaa12 4466
66e67e41 4467 auth_data->bss = req->bss;
77fdaa12 4468
6b8ece3a
JM		 4469 if (req->sae_data_len >= 4) {
4470 __le16 *pos = (__le16 *) req->sae_data;
4471 auth_data->sae_trans = le16_to_cpu(pos[0]);
4472 auth_data->sae_status = le16_to_cpu(pos[1]);
4473 memcpy(auth_data->data, req->sae_data + 4,
4474 req->sae_data_len - 4);
4475 auth_data->data_len += req->sae_data_len - 4;
4476 }
4477
77fdaa12 4478 if (req->ie && req->ie_len) {
6b8ece3a
JM		 4479 memcpy(&auth_data->data[auth_data->data_len],
4480 req->ie, req->ie_len);
4481 auth_data->data_len += req->ie_len;
9c6bd790 4482 }
77fdaa12 4483
fffd0934 4484 if (req->key && req->key_len) {
66e67e41
JB		 4485 auth_data->key_len = req->key_len;
4486 auth_data->key_idx = req->key_idx;
4487 memcpy(auth_data->key, req->key, req->key_len);
fffd0934
JB		 4488 }
4489
66e67e41 4490 auth_data->algorithm = auth_alg;
60f8b39c 4491
66e67e41 4492 /* try to authenticate/probe */
2a33bee2 4493
66e67e41
JB		 4494 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4495 ifmgd->assoc_data) {
4496 err = -EBUSY;
4497 goto err_free;
2a33bee2
GE		 4498 }
4499
66e67e41
JB		 4500 if (ifmgd->auth_data)
4501 ieee80211_destroy_auth_data(sdata, false);
2a33bee2 4502
66e67e41
JB		 4503 /* prep auth_data so we don't go into idle on disassoc */
4504 ifmgd->auth_data = auth_data;
af6b6374 4505
7b119dc0
JB		 4506 if (ifmgd->associated) {
4507 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4508
4509 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4510 WLAN_REASON_UNSPECIFIED,
4511 false, frame_buf);
4512
a90faa9d
EG		 4513 ieee80211_report_disconnect(sdata, frame_buf,
4514 sizeof(frame_buf), true,
4515 WLAN_REASON_UNSPECIFIED);
7b119dc0 4516 }
af6b6374 4517
bdcbd8e0 4518 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
e5b900d2 4519
c1041f10 4520 err = ieee80211_prep_connection(sdata, req->bss, false, false);
a1cf775d 4521 if (err)
66e67e41 4522 goto err_clear;
af6b6374 4523
46cad4b7 4524 err = ieee80211_auth(sdata);
66e67e41 4525 if (err) {
66e67e41
JB		 4526 sta_info_destroy_addr(sdata, req->bss->bssid);
4527 goto err_clear;
4528 }
4529
4530 /* hold our own reference */
5b112d3d 4531 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
8d61ffa5 4532 return 0;
66e67e41
JB		 4533
4534 err_clear:
c84a67a2 4535 eth_zero_addr(ifmgd->bssid);
3d2abdfd 4536 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41 4537 ifmgd->auth_data = NULL;
d01f858c
MK		 4538 mutex_lock(&sdata->local->mtx);
4539 ieee80211_vif_release_channel(sdata);
4540 mutex_unlock(&sdata->local->mtx);
66e67e41
JB		 4541 err_free:
4542 kfree(auth_data);
66e67e41 4543 return err;
af6b6374
JB		 4544}
4545
095d81ce
JB		 4546static bool ieee80211_usable_wmm_params(struct ieee80211_sub_if_data *sdata,
4547 const u8 *wmm_param, int len)
4548{
4549 const u8 *pos;
4550 size_t left;
4551
4552 if (len < 8)
4553 return false;
4554
4555 if (wmm_param[5] != 1 /* version */)
4556 return false;
4557
4558 pos = wmm_param + 8;
4559 left = len - 8;
4560
4561 for (; left >= 4; left -= 4, pos += 4) {
4562 u8 aifsn = pos[0] & 0x0f;
4563 u8 ecwmin = pos[1] & 0x0f;
4564 u8 ecwmax = (pos[1] & 0xf0) >> 4;
4565 int aci = (pos[0] >> 5) & 0x03;
4566
4567 if (aifsn < 2) {
4568 sdata_info(sdata,
4569 "AP has invalid WMM params (AIFSN=%d for ACI %d), disabling WMM\n",
4570 aifsn, aci);
4571 return false;
4572 }
4573 if (ecwmin > ecwmax) {
4574 sdata_info(sdata,
4575 "AP has invalid WMM params (ECWmin/max=%d/%d for ACI %d), disabling WMM\n",
4576 ecwmin, ecwmax, aci);
4577 return false;
4578 }
4579 }
4580
4581 return true;
4582}
4583
77fdaa12
JB		 4584int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4585 struct cfg80211_assoc_request *req)
f0706e82 4586{
66e67e41 4587 struct ieee80211_local *local = sdata->local;
77fdaa12 4588 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 4589 struct ieee80211_bss *bss = (void *)req->bss->priv;
66e67e41 4590 struct ieee80211_mgd_assoc_data *assoc_data;
c65dd147 4591 const struct cfg80211_bss_ies *beacon_ies;
4e74bfdb 4592 struct ieee80211_supported_band *sband;
b08fbbd8 4593 const u8 *ssidie, *ht_ie, *vht_ie;
2a33bee2 4594 int i, err;
c1041f10 4595 bool override = false;
f0706e82 4596
66e67e41
JB		 4597 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4598 if (!assoc_data)
4599 return -ENOMEM;
4600
9caf0364
JB		 4601 rcu_read_lock();
4602 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4603 if (!ssidie) {
4604 rcu_read_unlock();
4605 kfree(assoc_data);
4606 return -EINVAL;
4607 }
4608 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4609 assoc_data->ssid_len = ssidie[1];
4610 rcu_read_unlock();
4611
7b119dc0
JB		 4612 if (ifmgd->associated) {
4613 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4614
4615 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4616 WLAN_REASON_UNSPECIFIED,
4617 false, frame_buf);
4618
a90faa9d
EG		 4619 ieee80211_report_disconnect(sdata, frame_buf,
4620 sizeof(frame_buf), true,
4621 WLAN_REASON_UNSPECIFIED);
7b119dc0 4622 }
66e67e41
JB		 4623
4624 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4625 err = -EBUSY;
4626 goto err_free;
af6b6374 4627 }
77fdaa12 4628
66e67e41
JB		 4629 if (ifmgd->assoc_data) {
4630 err = -EBUSY;
4631 goto err_free;
4632 }
77fdaa12 4633
66e67e41
JB		 4634 if (ifmgd->auth_data) {
4635 bool match;
4636
4637 /* keep sta info, bssid if matching */
b203ca39 4638 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
66e67e41 4639 ieee80211_destroy_auth_data(sdata, match);
2a33bee2
GE		 4640 }
4641
66e67e41 4642 /* prepare assoc data */
095d81ce 4643
d8ec4433
JO		 4644 ifmgd->beacon_crc_valid = false;
4645
095d81ce
JB		 4646 assoc_data->wmm = bss->wmm_used &&
4647 (local->hw.queues >= IEEE80211_NUM_ACS);
4648 if (assoc_data->wmm) {
4649 /* try to check validity of WMM params IE */
4650 const struct cfg80211_bss_ies *ies;
4651 const u8 *wp, *start, *end;
4652
4653 rcu_read_lock();
4654 ies = rcu_dereference(req->bss->ies);
4655 start = ies->data;
4656 end = start + ies->len;
4657
4658 while (true) {
4659 wp = cfg80211_find_vendor_ie(
4660 WLAN_OUI_MICROSOFT,
4661 WLAN_OUI_TYPE_MICROSOFT_WMM,
4662 start, end - start);
4663 if (!wp)
4664 break;
4665 start = wp + wp[1] + 2;
4666 /* if this IE is too short, try the next */
4667 if (wp[1] <= 4)
4668 continue;
4669 /* if this IE is WMM params, we found what we wanted */
4670 if (wp[6] == 1)
4671 break;
4672 }
4673
4674 if (!wp || !ieee80211_usable_wmm_params(sdata, wp + 2,
4675 wp[1] - 2)) {
4676 assoc_data->wmm = false;
4677 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
4678 }
4679 rcu_read_unlock();
4680 }
4681
de5036aa
JB		 4682 /*
4683 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4684 * We still associate in non-HT mode (11a/b/g) if any one of these
4685 * ciphers is configured as pairwise.
4686 * We can set this to true for non-11n hardware, that'll be checked
4687 * separately along with the peer capabilities.
4688 */
1c4cb928 4689 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
77fdaa12
JB		 4690 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4691 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
1c4cb928 4692 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
a8243b72 4693 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
d545daba 4694 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
1c4cb928 4695 netdev_info(sdata->dev,
d545daba 4696 "disabling HT/VHT due to WEP/TKIP use\n");
1c4cb928
JB		 4697 }
4698 }
77fdaa12 4699
4e74bfdb
JB		 4700 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4701 sband = local->hw.wiphy->bands[req->bss->channel->band];
4702 if (!sband->ht_cap.ht_supported ||
095d81ce
JB		 4703 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4704 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
a8243b72 4705 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
095d81ce
JB		 4706 if (!bss->wmm_used &&
4707 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
1b49de26
JB		 4708 netdev_info(sdata->dev,
4709 "disabling HT as WMM/QoS is not supported by the AP\n");
1c4cb928 4710 }
4e74bfdb 4711
d545daba
MP		 4712 /* disable VHT if we don't support it or the AP doesn't use WMM */
4713 if (!sband->vht_cap.vht_supported ||
095d81ce
JB		 4714 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4715 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
d545daba 4716 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
095d81ce
JB		 4717 if (!bss->wmm_used &&
4718 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
1b49de26
JB		 4719 netdev_info(sdata->dev,
4720 "disabling VHT as WMM/QoS is not supported by the AP\n");
d545daba
MP		 4721 }
4722
ef96a842
BG		 4723 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4724 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4725 sizeof(ifmgd->ht_capa_mask));
4726
dd5ecfea
JB		 4727 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4728 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4729 sizeof(ifmgd->vht_capa_mask));
4730
77fdaa12 4731 if (req->ie && req->ie_len) {
66e67e41
JB		 4732 memcpy(assoc_data->ie, req->ie, req->ie_len);
4733 assoc_data->ie_len = req->ie_len;
4734 }
f679f65d 4735
66e67e41 4736 assoc_data->bss = req->bss;
f679f65d 4737
af6b6374
JB		 4738 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4739 if (ifmgd->powersave)
04ecd257 4740 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
af6b6374 4741 else
04ecd257 4742 sdata->smps_mode = IEEE80211_SMPS_OFF;
af6b6374 4743 } else
04ecd257 4744 sdata->smps_mode = ifmgd->req_smps;
af6b6374 4745
66e67e41 4746 assoc_data->capability = req->bss->capability;
66e67e41
JB		 4747 assoc_data->supp_rates = bss->supp_rates;
4748 assoc_data->supp_rates_len = bss->supp_rates_len;
9dde6423 4749
9caf0364 4750 rcu_read_lock();
9dde6423
JB		 4751 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4752 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4753 assoc_data->ap_ht_param =
4754 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4755 else
a8243b72 4756 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
b08fbbd8
JB		 4757 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4758 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4759 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4760 sizeof(struct ieee80211_vht_cap));
4761 else
4762 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
9caf0364 4763 rcu_read_unlock();
63f170e0 4764
848955cc 4765 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
30686bf7 4766 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK),
848955cc
JB		 4767 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
4768 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
4769
ab13315a 4770 if (bss->wmm_used && bss->uapsd_supported &&
848955cc 4771 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
76f0303d 4772 assoc_data->uapsd = true;
ab13315a
KV		 4773 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4774 } else {
76f0303d 4775 assoc_data->uapsd = false;
ab13315a
KV		 4776 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4777 }
4778
77fdaa12 4779 if (req->prev_bssid)
66e67e41 4780 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12
JB		 4781
4782 if (req->use_mfp) {
4783 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4784 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4785 } else {
4786 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4787 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4788 }
4789
cd2f5dd7
AK		 4790 if (req->flags & ASSOC_REQ_USE_RRM)
4791 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
4792 else
4793 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
4794
77fdaa12
JB		 4795 if (req->crypto.control_port)
4796 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4797 else
4798 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4799
a621fa4d
JB		 4800 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4801 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
2475b1cc
MS		 4802 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
4803 sdata->vif.type);
a621fa4d 4804
66e67e41
JB		 4805 /* kick off associate process */
4806
4807 ifmgd->assoc_data = assoc_data;
826262c3 4808 ifmgd->dtim_period = 0;
989c6505 4809 ifmgd->have_beacon = false;
66e67e41 4810
c1041f10
CRI		 4811 /* override HT/VHT configuration only if the AP and we support it */
4812 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
4813 struct ieee80211_sta_ht_cap sta_ht_cap;
4814
4815 if (req->flags & ASSOC_REQ_DISABLE_HT)
4816 override = true;
4817
4818 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
4819 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
4820
4821 /* check for 40 MHz disable override */
4822 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) &&
4823 sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
4824 !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
4825 override = true;
4826
4827 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4828 req->flags & ASSOC_REQ_DISABLE_VHT)
4829 override = true;
4830 }
4831
4832 if (req->flags & ASSOC_REQ_DISABLE_HT) {
4833 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4834 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4835 }
4836
4837 if (req->flags & ASSOC_REQ_DISABLE_VHT)
4838 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4839
4840 err = ieee80211_prep_connection(sdata, req->bss, true, override);
a1cf775d
JB		 4841 if (err)
4842 goto err_clear;
66e67e41 4843
c65dd147
EG		 4844 rcu_read_lock();
4845 beacon_ies = rcu_dereference(req->bss->beacon_ies);
826262c3 4846
30686bf7 4847 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) &&
c65dd147
EG		 4848 !beacon_ies) {
4849 /*
4850 * Wait up to one beacon interval ...
4851 * should this be more if we miss one?
4852 */
4853 sdata_info(sdata, "waiting for beacon from %pM\n",
4854 ifmgd->bssid);
4855 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
89afe614 4856 assoc_data->timeout_started = true;
c65dd147
EG		 4857 assoc_data->need_beacon = true;
4858 } else if (beacon_ies) {
4859 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4860 beacon_ies->data,
4861 beacon_ies->len);
ef429dad
JB		 4862 u8 dtim_count = 0;
4863
c65dd147
EG		 4864 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4865 const struct ieee80211_tim_ie *tim;
4866 tim = (void *)(tim_ie + 2);
4867 ifmgd->dtim_period = tim->dtim_period;
ef429dad 4868 dtim_count = tim->dtim_count;
826262c3 4869 }
989c6505 4870 ifmgd->have_beacon = true;
66e67e41 4871 assoc_data->timeout = jiffies;
89afe614 4872 assoc_data->timeout_started = true;
ef429dad 4873
30686bf7 4874 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
ef429dad
JB		 4875 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4876 sdata->vif.bss_conf.sync_device_ts =
4877 bss->device_ts_beacon;
4878 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4879 }
c65dd147
EG		 4880 } else {
4881 assoc_data->timeout = jiffies;
89afe614 4882 assoc_data->timeout_started = true;
66e67e41 4883 }
c65dd147
EG		 4884 rcu_read_unlock();
4885
8d61ffa5 4886 run_again(sdata, assoc_data->timeout);
66e67e41 4887
fcff4f10
PS		 4888 if (bss->corrupt_data) {
4889 char *corrupt_type = "data";
4890 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4891 if (bss->corrupt_data &
4892 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4893 corrupt_type = "beacon and probe response";
4894 else
4895 corrupt_type = "beacon";
4896 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4897 corrupt_type = "probe response";
bdcbd8e0
JB		 4898 sdata_info(sdata, "associating with AP with corrupt %s\n",
4899 corrupt_type);
fcff4f10
PS		 4900 }
4901
8d61ffa5 4902 return 0;
66e67e41 4903 err_clear:
c84a67a2 4904 eth_zero_addr(ifmgd->bssid);
3d2abdfd 4905 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 4906 ifmgd->assoc_data = NULL;
4907 err_free:
4908 kfree(assoc_data);
66e67e41 4909 return err;
f0706e82
JB		 4910}
4911
77fdaa12 4912int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
63c9c5e7 4913 struct cfg80211_deauth_request *req)
f0706e82 4914{
46900298 4915 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 4916 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
6863255b 4917 bool tx = !req->local_state_change;
f0706e82 4918
c9c3a060
JB		 4919 if (ifmgd->auth_data &&
4920 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
4921 sdata_info(sdata,
4922 "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
4923 req->bssid, req->reason_code,
4924 ieee80211_get_reason_code_string(req->reason_code));
0ff71613 4925
8c7d857c 4926 drv_mgd_prepare_tx(sdata->local, sdata);
37ad3888
JB		 4927 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4928 IEEE80211_STYPE_DEAUTH,
6863255b 4929 req->reason_code, tx,
37ad3888 4930 frame_buf);
86552017 4931 ieee80211_destroy_auth_data(sdata, false);
a90faa9d
EG		 4932 ieee80211_report_disconnect(sdata, frame_buf,
4933 sizeof(frame_buf), true,
4934 req->reason_code);
86552017 4935
c9c3a060 4936 return 0;
8c7d857c
EG		 4937 }
4938
a64cba3c
AO		 4939 if (ifmgd->assoc_data &&
4940 ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) {
4941 sdata_info(sdata,
4942 "aborting association with %pM by local choice (Reason: %u=%s)\n",
4943 req->bssid, req->reason_code,
4944 ieee80211_get_reason_code_string(req->reason_code));
4945
4946 drv_mgd_prepare_tx(sdata->local, sdata);
4947 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4948 IEEE80211_STYPE_DEAUTH,
4949 req->reason_code, tx,
4950 frame_buf);
4951 ieee80211_destroy_assoc_data(sdata, false);
4952 ieee80211_report_disconnect(sdata, frame_buf,
4953 sizeof(frame_buf), true,
4954 req->reason_code);
4955 return 0;
4956 }
4957
86552017
JB		 4958 if (ifmgd->associated &&
4959 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
c9c3a060
JB		 4960 sdata_info(sdata,
4961 "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
4962 req->bssid, req->reason_code,
4963 ieee80211_get_reason_code_string(req->reason_code));
4964
86552017
JB		 4965 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4966 req->reason_code, tx, frame_buf);
a90faa9d
EG		 4967 ieee80211_report_disconnect(sdata, frame_buf,
4968 sizeof(frame_buf), true,
4969 req->reason_code);
c9c3a060
JB		 4970 return 0;
4971 }
86552017 4972
c9c3a060 4973 return -ENOTCONN;
f0706e82 4974}
84363e6e 4975
77fdaa12 4976int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 4977 struct cfg80211_disassoc_request *req)
9c6bd790 4978{
77fdaa12 4979 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 4980 u8 bssid[ETH_ALEN];
6ae16775 4981 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
9c6bd790 4982
8d8b261a
JB		 4983 /*
4984 * cfg80211 should catch this ... but it's racy since
4985 * we can receive a disassoc frame, process it, hand it
4986 * to cfg80211 while that's in a locked section already
4987 * trying to tell us that the user wants to disconnect.
4988 */
8d61ffa5 4989 if (ifmgd->associated != req->bss)
77fdaa12 4990 return -ENOLINK;
77fdaa12 4991
bdcbd8e0 4992 sdata_info(sdata,
dfa1ad29
CO		 4993 "disassociating from %pM by local choice (Reason: %u=%s)\n",
4994 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
0ff71613 4995
e69e95db 4996 memcpy(bssid, req->bss->bssid, ETH_ALEN);
37ad3888
JB		 4997 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4998 req->reason_code, !req->local_state_change,
4999 frame_buf);
10f644a4 5000
a90faa9d
EG		 5001 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
5002 req->reason_code);
bc83b681 5003
10f644a4
JB		 5004 return 0;
5005}
026331c4 5006
afa762f6 5007void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
54e4ffb2
JB		 5008{
5009 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5010
49921859
BG		 5011 /*
5012 * Make sure some work items will not run after this,
5013 * they will not do anything but might not have been
5014 * cancelled when disconnecting.
5015 */
5016 cancel_work_sync(&ifmgd->monitor_work);
5017 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5018 cancel_work_sync(&ifmgd->request_smps_work);
5019 cancel_work_sync(&ifmgd->csa_connection_drop_work);
5020 cancel_work_sync(&ifmgd->chswitch_work);
81dd2b88 5021 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
49921859 5022
8d61ffa5 5023 sdata_lock(sdata);
959867fa
JB		 5024 if (ifmgd->assoc_data) {
5025 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
54e4ffb2 5026 ieee80211_destroy_assoc_data(sdata, false);
959867fa
JB		 5027 cfg80211_assoc_timeout(sdata->dev, bss);
5028 }
54e4ffb2
JB		 5029 if (ifmgd->auth_data)
5030 ieee80211_destroy_auth_data(sdata, false);
1277b4a9
LK		 5031 spin_lock_bh(&ifmgd->teardown_lock);
5032 if (ifmgd->teardown_skb) {
5033 kfree_skb(ifmgd->teardown_skb);
5034 ifmgd->teardown_skb = NULL;
5035 ifmgd->orig_teardown_skb = NULL;
5036 }
5037 spin_unlock_bh(&ifmgd->teardown_lock);
54e4ffb2 5038 del_timer_sync(&ifmgd->timer);
8d61ffa5 5039 sdata_unlock(sdata);
54e4ffb2
JB		 5040}
5041
a97c13c3
JO		 5042void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
5043 enum nl80211_cqm_rssi_threshold_event rssi_event,
5044 gfp_t gfp)
5045{
5046 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5047
b5878a2d
JB		 5048 trace_api_cqm_rssi_notify(sdata, rssi_event);
5049
a97c13c3
JO		 5050 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
5051}
5052EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
98f03342
JB		 5053
5054void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
5055{
5056 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5057
5058 trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
5059
5060 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
5061}
5062EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);
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