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mac80211: fixup AIFSN instead of disabling WMM
[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;
730a7550
EG		 1819
1820 if (params.aifs < 2) {
1821 sdata_info(sdata,
1822 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n",
1823 params.aifs, aci);
1824 params.aifs = 2;
1825 }
f0706e82
JB		 1826 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1827 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 1828 params.txop = get_unaligned_le16(pos + 2);
908f8d07 1829 params.acm = acm;
ab13315a
KV		 1830 params.uapsd = uapsd;
1831
bdcbd8e0 1832 mlme_dbg(sdata,
02219b3a 1833 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
bdcbd8e0
JB		 1834 queue, aci, acm,
1835 params.aifs, params.cw_min, params.cw_max,
02219b3a
JB		 1836 params.txop, params.uapsd,
1837 ifmgd->tx_tspec[queue].downgraded);
f6f3def3 1838 sdata->tx_conf[queue] = params;
02219b3a
JB		 1839 if (!ifmgd->tx_tspec[queue].downgraded &&
1840 drv_conf_tx(local, sdata, queue, &params))
bdcbd8e0
JB		 1841 sdata_err(sdata,
1842 "failed to set TX queue parameters for queue %d\n",
1843 queue);
f0706e82 1844 }
e1b3ec1a
SG		 1845
1846 /* enable WMM or activate new settings */
4ced3f74 1847 sdata->vif.bss_conf.qos = true;
7d25745d 1848 return true;
f0706e82
JB		 1849}
1850
925e64c3
SG		 1851static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1852{
1853 lockdep_assert_held(&sdata->local->mtx);
1854
392b9ffb 1855 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
925e64c3
SG		 1856 ieee80211_run_deferred_scan(sdata->local);
1857}
1858
1859static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1860{
1861 mutex_lock(&sdata->local->mtx);
1862 __ieee80211_stop_poll(sdata);
1863 mutex_unlock(&sdata->local->mtx);
1864}
1865
7a5158ef
JB		 1866static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1867 u16 capab, bool erp_valid, u8 erp)
5628221c 1868{
bda3933a 1869 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 1870 u32 changed = 0;
7a5158ef
JB		 1871 bool use_protection;
1872 bool use_short_preamble;
1873 bool use_short_slot;
1874
1875 if (erp_valid) {
1876 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1877 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1878 } else {
1879 use_protection = false;
1880 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1881 }
1882
1883 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
55de908a 1884 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
43d35343 1885 use_short_slot = true;
5628221c 1886
471b3efd 1887 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 1888 bss_conf->use_cts_prot = use_protection;
1889 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 1890 }
7e9ed188 1891
d43c7b37 1892 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 1893 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 1894 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 1895 }
d9430a32 1896
7a5158ef 1897 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 1898 bss_conf->use_short_slot = use_short_slot;
1899 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 1900 }
1901
1902 return changed;
1903}
1904
f698d856 1905static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 1906 struct cfg80211_bss *cbss,
ae5eb026 1907 u32 bss_info_changed)
f0706e82 1908{
0c1ad2ca 1909 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 1910 struct ieee80211_local *local = sdata->local;
68542962 1911 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
d6f2da5b 1912
ae5eb026 1913 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 1914 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
50ae34a2 1915 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 1916
7ccc8bd7 1917 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
59c1ec2b 1918 beacon_loss_count * bss_conf->beacon_int));
7ccc8bd7 1919
0c1ad2ca
JB		 1920 sdata->u.mgd.associated = cbss;
1921 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 1922
17e4ec14
JM		 1923 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1924
488dd7b5 1925 if (sdata->vif.p2p) {
9caf0364 1926 const struct cfg80211_bss_ies *ies;
488dd7b5 1927
9caf0364
JB		 1928 rcu_read_lock();
1929 ies = rcu_dereference(cbss->ies);
1930 if (ies) {
9caf0364
JB		 1931 int ret;
1932
1933 ret = cfg80211_get_p2p_attr(
1934 ies->data, ies->len,
1935 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
67baf663
JD		 1936 (u8 *) &bss_conf->p2p_noa_attr,
1937 sizeof(bss_conf->p2p_noa_attr));
9caf0364 1938 if (ret >= 2) {
67baf663
JD		 1939 sdata->u.mgd.p2p_noa_index =
1940 bss_conf->p2p_noa_attr.index;
9caf0364 1941 bss_info_changed |= BSS_CHANGED_P2P_PS;
9caf0364 1942 }
488dd7b5 1943 }
9caf0364 1944 rcu_read_unlock();
488dd7b5
JB		 1945 }
1946
b291ba11 1947 /* just to be sure */
925e64c3 1948 ieee80211_stop_poll(sdata);
b291ba11 1949
9ac19a90 1950 ieee80211_led_assoc(local, 1);
9306102e 1951
989c6505 1952 if (sdata->u.mgd.have_beacon) {
826262c3
JB		 1953 /*
1954 * If the AP is buggy we may get here with no DTIM period
1955 * known, so assume it's 1 which is the only safe assumption
1956 * in that case, although if the TIM IE is broken powersave
1957 * probably just won't work at all.
1958 */
1959 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
817cee76 1960 bss_conf->beacon_rate = bss->beacon_rate;
989c6505 1961 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
826262c3 1962 } else {
817cee76 1963 bss_conf->beacon_rate = NULL;
e5b900d2 1964 bss_conf->dtim_period = 0;
826262c3 1965 }
e5b900d2 1966
68542962 1967 bss_conf->assoc = 1;
9cef8737 1968
a97c13c3 1969 /* Tell the driver to monitor connection quality (if supported) */
ea086359 1970 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
68542962 1971 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 1972 bss_info_changed |= BSS_CHANGED_CQM;
1973
68542962 1974 /* Enable ARP filtering */
0f19b41e 1975 if (bss_conf->arp_addr_cnt)
68542962 1976 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
68542962 1977
ae5eb026 1978 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 1979
056508dc 1980 mutex_lock(&local->iflist_mtx);
4a733ef1 1981 ieee80211_recalc_ps(local);
056508dc 1982 mutex_unlock(&local->iflist_mtx);
e0cb686f 1983
04ecd257 1984 ieee80211_recalc_smps(sdata);
ab095877
EP		 1985 ieee80211_recalc_ps_vif(sdata);
1986
9ac19a90 1987 netif_carrier_on(sdata->dev);
f0706e82
JB		 1988}
1989
e69e95db 1990static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
37ad3888
JB		 1991 u16 stype, u16 reason, bool tx,
1992 u8 *frame_buf)
aa458d17 1993{
46900298 1994 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17 1995 struct ieee80211_local *local = sdata->local;
3cc5240b 1996 u32 changed = 0;
aa458d17 1997
8d61ffa5 1998 sdata_assert_lock(sdata);
77fdaa12 1999
37ad3888
JB		 2000 if (WARN_ON_ONCE(tx && !frame_buf))
2001 return;
2002
b291ba11
JB		 2003 if (WARN_ON(!ifmgd->associated))
2004 return;
2005
79543d8e
DS		 2006 ieee80211_stop_poll(sdata);
2007
77fdaa12 2008 ifmgd->associated = NULL;
aa458d17
TW		 2009 netif_carrier_off(sdata->dev);
2010
88bc40e8
EP		 2011 /*
2012 * if we want to get out of ps before disassoc (why?) we have
2013 * to do it before sending disassoc, as otherwise the null-packet
2014 * won't be valid.
2015 */
2016 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2017 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2018 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2019 }
2020 local->ps_sdata = NULL;
2021
ab095877
EP		 2022 /* disable per-vif ps */
2023 ieee80211_recalc_ps_vif(sdata);
2024
14f2ae83
EG		 2025 /* make sure ongoing transmission finishes */
2026 synchronize_net();
2027
3b24f4c6
EG		 2028 /*
2029 * drop any frame before deauth/disassoc, this can be data or
2030 * management frame. Since we are disconnecting, we should not
2031 * insist sending these frames which can take time and delay
2032 * the disconnection and possible the roaming.
2033 */
f823981e 2034 if (tx)
3b24f4c6 2035 ieee80211_flush_queues(local, sdata, true);
f823981e 2036
37ad3888
JB		 2037 /* deauthenticate/disassociate now */
2038 if (tx || frame_buf)
88a9e31c
EP		 2039 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
2040 reason, tx, frame_buf);
37ad3888 2041
3b24f4c6 2042 /* flush out frame - make sure the deauth was actually sent */
37ad3888 2043 if (tx)
3b24f4c6 2044 ieee80211_flush_queues(local, sdata, false);
37ad3888 2045
88a9e31c 2046 /* clear bssid only after building the needed mgmt frames */
c84a67a2 2047 eth_zero_addr(ifmgd->bssid);
88a9e31c 2048
37ad3888 2049 /* remove AP and TDLS peers */
d34ba216 2050 sta_info_flush(sdata);
37ad3888
JB		 2051
2052 /* finally reset all BSS / config parameters */
f5e5bf25
TW		 2053 changed |= ieee80211_reset_erp_info(sdata);
2054
f5e5bf25 2055 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 2056 changed |= BSS_CHANGED_ASSOC;
2057 sdata->vif.bss_conf.assoc = false;
f5e5bf25 2058
67baf663
JD		 2059 ifmgd->p2p_noa_index = -1;
2060 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
2061 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
488dd7b5 2062
dd5ecfea 2063 /* on the next assoc, re-program HT/VHT parameters */
ef96a842
BG		 2064 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
2065 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
dd5ecfea
JB		 2066 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
2067 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
322cd406 2068 sdata->flags &= ~IEEE80211_SDATA_MU_MIMO_OWNER;
413ad50a 2069
1ea6f9c0 2070 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
a8302de9 2071
520eb820
KV		 2072 del_timer_sync(&local->dynamic_ps_timer);
2073 cancel_work_sync(&local->dynamic_ps_enable_work);
2074
68542962 2075 /* Disable ARP filtering */
0f19b41e 2076 if (sdata->vif.bss_conf.arp_addr_cnt)
68542962 2077 changed |= BSS_CHANGED_ARP_FILTER;
68542962 2078
3abead59
JB		 2079 sdata->vif.bss_conf.qos = false;
2080 changed |= BSS_CHANGED_QOS;
2081
0aaffa9b
JB		 2082 /* The BSSID (not really interesting) and HT changed */
2083 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 2084 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 2085
3abead59 2086 /* disassociated - set to defaults now */
cec66283 2087 ieee80211_set_wmm_default(sdata, false, false);
3abead59 2088
b9dcf712
JB		 2089 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
2090 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
2091 del_timer_sync(&sdata->u.mgd.timer);
2092 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2d9957cc 2093
826262c3 2094 sdata->vif.bss_conf.dtim_period = 0;
817cee76
AB		 2095 sdata->vif.bss_conf.beacon_rate = NULL;
2096
989c6505 2097 ifmgd->have_beacon = false;
826262c3 2098
028e8da0 2099 ifmgd->flags = 0;
34a3740d 2100 mutex_lock(&local->mtx);
028e8da0 2101 ieee80211_vif_release_channel(sdata);
59af6928
MK		 2102
2103 sdata->vif.csa_active = false;
0c21e632 2104 ifmgd->csa_waiting_bcn = false;
f84eaa10 2105 ifmgd->csa_ignored_same_chan = false;
a46992b4
LC		 2106 if (sdata->csa_block_tx) {
2107 ieee80211_wake_vif_queues(local, sdata,
2108 IEEE80211_QUEUE_STOP_REASON_CSA);
2109 sdata->csa_block_tx = false;
2110 }
34a3740d 2111 mutex_unlock(&local->mtx);
2475b1cc 2112
02219b3a
JB		 2113 /* existing TX TSPEC sessions no longer exist */
2114 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
2115 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
2116
2475b1cc 2117 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
aa458d17 2118}
f0706e82 2119
3cf335d5
KV		 2120void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
2121 struct ieee80211_hdr *hdr)
2122{
2123 /*
2124 * We can postpone the mgd.timer whenever receiving unicast frames
2125 * from AP because we know that the connection is working both ways
2126 * at that time. But multicast frames (and hence also beacons) must
2127 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 2128 * data idle periods for sending the periodic probe request to the
2129 * AP we're connected to.
3cf335d5 2130 */
b291ba11
JB		 2131 if (is_multicast_ether_addr(hdr->addr1))
2132 return;
2133
be099e82 2134 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 2135}
f0706e82 2136
4e5ff376
FF		 2137static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
2138{
2139 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
133d40f9 2140 struct ieee80211_local *local = sdata->local;
4e5ff376 2141
133d40f9 2142 mutex_lock(&local->mtx);
392b9ffb
SG		 2143 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
2144 goto out;
4e5ff376 2145
925e64c3 2146 __ieee80211_stop_poll(sdata);
133d40f9
SG		 2147
2148 mutex_lock(&local->iflist_mtx);
4a733ef1 2149 ieee80211_recalc_ps(local);
133d40f9 2150 mutex_unlock(&local->iflist_mtx);
4e5ff376 2151
30686bf7 2152 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
133d40f9 2153 goto out;
4e5ff376
FF		 2154
2155 /*
2156 * We've received a probe response, but are not sure whether
2157 * we have or will be receiving any beacons or data, so let's
2158 * schedule the timers again, just in case.
2159 */
2160 ieee80211_sta_reset_beacon_monitor(sdata);
2161
2162 mod_timer(&ifmgd->conn_mon_timer,
2163 round_jiffies_up(jiffies +
2164 IEEE80211_CONNECTION_IDLE_TIME));
133d40f9 2165out:
133d40f9 2166 mutex_unlock(&local->mtx);
4e5ff376
FF		 2167}
2168
02219b3a
JB		 2169static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
2170 struct ieee80211_hdr *hdr,
2171 u16 tx_time)
2172{
2173 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2174 u16 tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
2175 int ac = ieee80211_ac_from_tid(tid);
2176 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
2177 unsigned long now = jiffies;
2178
2179 if (likely(!tx_tspec->admitted_time))
2180 return;
2181
2182 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2183 tx_tspec->consumed_tx_time = 0;
2184 tx_tspec->time_slice_start = now;
2185
2186 if (tx_tspec->downgraded) {
2187 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
2188 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2189 }
2190 }
2191
2192 if (tx_tspec->downgraded)
2193 return;
2194
2195 tx_tspec->consumed_tx_time += tx_time;
2196
2197 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
2198 tx_tspec->downgraded = true;
2199 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
2200 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2201 }
2202}
2203
4e5ff376 2204void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
02219b3a 2205 struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
4e5ff376 2206{
02219b3a
JB		 2207 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
2208
75706d0e 2209 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF		 2210 return;
2211
4e5ff376
FF		 2212 if (ieee80211_is_nullfunc(hdr->frame_control) &&
2213 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e 2214 if (ack)
cab1c7fd 2215 ieee80211_sta_reset_conn_monitor(sdata);
04ac3c0e
FF		 2216 else
2217 sdata->u.mgd.nullfunc_failed = true;
4e5ff376 2218 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
cab1c7fd 2219 return;
4e5ff376 2220 }
cab1c7fd
WD		 2221
2222 if (ack)
2223 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF		 2224}
2225
a43abf29
ML		 2226static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2227{
2228 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2229 const u8 *ssid;
f01a067d 2230 u8 *dst = ifmgd->associated->bssid;
180205bd 2231 u8 unicast_limit = max(1, max_probe_tries - 3);
f01a067d
LR		 2232
2233 /*
2234 * Try sending broadcast probe requests for the last three
2235 * probe requests after the first ones failed since some
2236 * buggy APs only support broadcast probe requests.
2237 */
2238 if (ifmgd->probe_send_count >= unicast_limit)
2239 dst = NULL;
a43abf29 2240
4e5ff376
FF		 2241 /*
2242 * When the hardware reports an accurate Tx ACK status, it's
2243 * better to send a nullfunc frame instead of a probe request,
2244 * as it will kick us off the AP quickly if we aren't associated
2245 * anymore. The timeout will be reset if the frame is ACKed by
2246 * the AP.
2247 */
992e68bf
SD		 2248 ifmgd->probe_send_count++;
2249
30686bf7 2250 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) {
04ac3c0e 2251 ifmgd->nullfunc_failed = false;
076cdcb1 2252 ieee80211_send_nullfunc(sdata->local, sdata, false);
04ac3c0e 2253 } else {
88c868c4
SG		 2254 int ssid_len;
2255
9caf0364 2256 rcu_read_lock();
4e5ff376 2257 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
88c868c4
SG		 2258 if (WARN_ON_ONCE(ssid == NULL))
2259 ssid_len = 0;
2260 else
2261 ssid_len = ssid[1];
2262
a73f8e21 2263 ieee80211_send_probe_req(sdata, sdata->vif.addr, dst,
a344d677 2264 ssid + 2, ssid_len, NULL,
1672c0e3 2265 0, (u32) -1, true, 0,
55de908a 2266 ifmgd->associated->channel, false);
9caf0364 2267 rcu_read_unlock();
4e5ff376 2268 }
a43abf29 2269
180205bd 2270 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
8d61ffa5 2271 run_again(sdata, ifmgd->probe_timeout);
a43abf29
ML		 2272}
2273
b291ba11
JB		 2274static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2275 bool beacon)
04de8381 2276{
04de8381 2277 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 2278 bool already = false;
34bfc411 2279
9607e6b6 2280 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 2281 return;
2282
8d61ffa5 2283 sdata_lock(sdata);
77fdaa12
JB		 2284
2285 if (!ifmgd->associated)
2286 goto out;
2287
133d40f9
SG		 2288 mutex_lock(&sdata->local->mtx);
2289
2290 if (sdata->local->tmp_channel || sdata->local->scanning) {
2291 mutex_unlock(&sdata->local->mtx);
2292 goto out;
2293 }
2294
a13fbe54 2295 if (beacon) {
bdcbd8e0 2296 mlme_dbg_ratelimited(sdata,
59c1ec2b
BG		 2297 "detected beacon loss from AP (missed %d beacons) - probing\n",
2298 beacon_loss_count);
bdcbd8e0 2299
98f03342 2300 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
a13fbe54 2301 }
04de8381 2302
b291ba11
JB		 2303 /*
2304 * The driver/our work has already reported this event or the
2305 * connection monitoring has kicked in and we have already sent
2306 * a probe request. Or maybe the AP died and the driver keeps
2307 * reporting until we disassociate...
2308 *
2309 * In either case we have to ignore the current call to this
2310 * function (except for setting the correct probe reason bit)
2311 * because otherwise we would reset the timer every time and
2312 * never check whether we received a probe response!
2313 */
392b9ffb 2314 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
b291ba11
JB		 2315 already = true;
2316
12b5f34d
EP		 2317 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2318
133d40f9
SG		 2319 mutex_unlock(&sdata->local->mtx);
2320
b291ba11
JB		 2321 if (already)
2322 goto out;
2323
4e751843 2324 mutex_lock(&sdata->local->iflist_mtx);
4a733ef1 2325 ieee80211_recalc_ps(sdata->local);
4e751843
JB		 2326 mutex_unlock(&sdata->local->iflist_mtx);
2327
a43abf29
ML		 2328 ifmgd->probe_send_count = 0;
2329 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12 2330 out:
8d61ffa5 2331 sdata_unlock(sdata);
04de8381
KV		 2332}
2333
a619a4c0
JO		 2334struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2335 struct ieee80211_vif *vif)
2336{
2337 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2338 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d9b3b28b 2339 struct cfg80211_bss *cbss;
a619a4c0
JO		 2340 struct sk_buff *skb;
2341 const u8 *ssid;
88c868c4 2342 int ssid_len;
a619a4c0
JO		 2343
2344 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2345 return NULL;
2346
8d61ffa5 2347 sdata_assert_lock(sdata);
a619a4c0 2348
d9b3b28b
EP		 2349 if (ifmgd->associated)
2350 cbss = ifmgd->associated;
2351 else if (ifmgd->auth_data)
2352 cbss = ifmgd->auth_data->bss;
2353 else if (ifmgd->assoc_data)
2354 cbss = ifmgd->assoc_data->bss;
2355 else
a619a4c0
JO		 2356 return NULL;
2357
9caf0364 2358 rcu_read_lock();
d9b3b28b 2359 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
88c868c4
SG		 2360 if (WARN_ON_ONCE(ssid == NULL))
2361 ssid_len = 0;
2362 else
2363 ssid_len = ssid[1];
2364
a344d677 2365 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
55de908a 2366 (u32) -1, cbss->channel,
6b77863b 2367 ssid + 2, ssid_len,
85a237fe 2368 NULL, 0, true);
9caf0364 2369 rcu_read_unlock();
a619a4c0
JO		 2370
2371 return skb;
2372}
2373EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2374
a90faa9d
EG		 2375static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata,
2376 const u8 *buf, size_t len, bool tx,
2377 u16 reason)
2378{
2379 struct ieee80211_event event = {
2380 .type = MLME_EVENT,
2381 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT,
2382 .u.mlme.reason = reason,
2383 };
2384
2385 if (tx)
2386 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len);
2387 else
2388 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len);
2389
2390 drv_event_callback(sdata->local, sdata, &event);
2391}
2392
eef9e54c 2393static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
1e4dcd01 2394{
59af6928 2395 struct ieee80211_local *local = sdata->local;
1e4dcd01 2396 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 2397 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
1e4dcd01 2398
8d61ffa5 2399 sdata_lock(sdata);
1e4dcd01 2400 if (!ifmgd->associated) {
8d61ffa5 2401 sdata_unlock(sdata);
1e4dcd01
JO		 2402 return;
2403 }
2404
37ad3888
JB		 2405 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2406 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
eef9e54c 2407 true, frame_buf);
59af6928 2408 mutex_lock(&local->mtx);
7578d575 2409 sdata->vif.csa_active = false;
0c21e632 2410 ifmgd->csa_waiting_bcn = false;
a46992b4
LC		 2411 if (sdata->csa_block_tx) {
2412 ieee80211_wake_vif_queues(local, sdata,
2413 IEEE80211_QUEUE_STOP_REASON_CSA);
2414 sdata->csa_block_tx = false;
2415 }
59af6928 2416 mutex_unlock(&local->mtx);
7da7cc1d 2417
a90faa9d
EG		 2418 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
2419 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2420
8d61ffa5 2421 sdata_unlock(sdata);
1e4dcd01
JO		 2422}
2423
cc74c0c7 2424static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 2425{
2426 struct ieee80211_sub_if_data *sdata =
2427 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 2428 u.mgd.beacon_connection_loss_work);
a85e1d55 2429 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
a85e1d55 2430
976bd9ef
JB		 2431 if (ifmgd->associated)
2432 ifmgd->beacon_loss_count++;
b291ba11 2433
682bd38b 2434 if (ifmgd->connection_loss) {
882a7c69
JB		 2435 sdata_info(sdata, "Connection to AP %pM lost\n",
2436 ifmgd->bssid);
eef9e54c 2437 __ieee80211_disconnect(sdata);
882a7c69 2438 } else {
1e4dcd01 2439 ieee80211_mgd_probe_ap(sdata, true);
882a7c69
JB		 2440 }
2441}
2442
2443static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2444{
2445 struct ieee80211_sub_if_data *sdata =
2446 container_of(work, struct ieee80211_sub_if_data,
2447 u.mgd.csa_connection_drop_work);
2448
eef9e54c 2449 __ieee80211_disconnect(sdata);
b291ba11
JB		 2450}
2451
04de8381
KV		 2452void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2453{
2454 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 2455 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 2456
b5878a2d
JB		 2457 trace_api_beacon_loss(sdata);
2458
682bd38b 2459 sdata->u.mgd.connection_loss = false;
1e4dcd01 2460 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 2461}
2462EXPORT_SYMBOL(ieee80211_beacon_loss);
2463
1e4dcd01
JO		 2464void ieee80211_connection_loss(struct ieee80211_vif *vif)
2465{
2466 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2467 struct ieee80211_hw *hw = &sdata->local->hw;
2468
b5878a2d
JB		 2469 trace_api_connection_loss(sdata);
2470
682bd38b 2471 sdata->u.mgd.connection_loss = true;
1e4dcd01
JO		 2472 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2473}
2474EXPORT_SYMBOL(ieee80211_connection_loss);
2475
2476
66e67e41
JB		 2477static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2478 bool assoc)
2479{
2480 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2481
8d61ffa5 2482 sdata_assert_lock(sdata);
66e67e41 2483
66e67e41 2484 if (!assoc) {
c1e140bf
EG		 2485 /*
2486 * we are not authenticated yet, the only timer that could be
2487 * running is the timeout for the authentication response which
2488 * which is not relevant anymore.
2489 */
2490 del_timer_sync(&sdata->u.mgd.timer);
66e67e41
JB		 2491 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2492
c84a67a2 2493 eth_zero_addr(sdata->u.mgd.bssid);
66e67e41 2494 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
028e8da0 2495 sdata->u.mgd.flags = 0;
34a3740d 2496 mutex_lock(&sdata->local->mtx);
55de908a 2497 ieee80211_vif_release_channel(sdata);
34a3740d 2498 mutex_unlock(&sdata->local->mtx);
66e67e41
JB		 2499 }
2500
5b112d3d 2501 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
66e67e41
JB		 2502 kfree(auth_data);
2503 sdata->u.mgd.auth_data = NULL;
2504}
2505
c9c99f89
JB		 2506static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2507 bool assoc)
2508{
2509 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2510
2511 sdata_assert_lock(sdata);
2512
2513 if (!assoc) {
2514 /*
2515 * we are not associated yet, the only timer that could be
2516 * running is the timeout for the association response which
2517 * which is not relevant anymore.
2518 */
2519 del_timer_sync(&sdata->u.mgd.timer);
2520 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2521
2522 eth_zero_addr(sdata->u.mgd.bssid);
2523 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2524 sdata->u.mgd.flags = 0;
322cd406 2525 sdata->flags &= ~IEEE80211_SDATA_MU_MIMO_OWNER;
c9c99f89
JB		 2526 mutex_lock(&sdata->local->mtx);
2527 ieee80211_vif_release_channel(sdata);
2528 mutex_unlock(&sdata->local->mtx);
2529 }
2530
2531 kfree(assoc_data);
2532 sdata->u.mgd.assoc_data = NULL;
2533}
2534
66e67e41
JB		 2535static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2536 struct ieee80211_mgmt *mgmt, size_t len)
2537{
1672c0e3 2538 struct ieee80211_local *local = sdata->local;
66e67e41
JB		 2539 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2540 u8 *pos;
2541 struct ieee802_11_elems elems;
1672c0e3 2542 u32 tx_flags = 0;
66e67e41
JB		 2543
2544 pos = mgmt->u.auth.variable;
b2e506bf 2545 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
66e67e41
JB		 2546 if (!elems.challenge)
2547 return;
2548 auth_data->expected_transaction = 4;
a1845fc7 2549 drv_mgd_prepare_tx(sdata->local, sdata);
30686bf7 2550 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1672c0e3
JB		 2551 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2552 IEEE80211_TX_INTFL_MLME_CONN_TX;
700e8ea6 2553 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
66e67e41
JB		 2554 elems.challenge - 2, elems.challenge_len + 2,
2555 auth_data->bss->bssid, auth_data->bss->bssid,
2556 auth_data->key, auth_data->key_len,
1672c0e3 2557 auth_data->key_idx, tx_flags);
66e67e41
JB		 2558}
2559
8d61ffa5
JB		 2560static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2561 struct ieee80211_mgmt *mgmt, size_t len)
66e67e41
JB		 2562{
2563 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2564 u8 bssid[ETH_ALEN];
2565 u16 auth_alg, auth_transaction, status_code;
2566 struct sta_info *sta;
a9409093
EG		 2567 struct ieee80211_event event = {
2568 .type = MLME_EVENT,
2569 .u.mlme.data = AUTH_EVENT,
2570 };
66e67e41 2571
8d61ffa5 2572 sdata_assert_lock(sdata);
66e67e41
JB		 2573
2574 if (len < 24 + 6)
8d61ffa5 2575 return;
66e67e41
JB		 2576
2577 if (!ifmgd->auth_data || ifmgd->auth_data->done)
8d61ffa5 2578 return;
66e67e41
JB		 2579
2580 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2581
b203ca39 2582 if (!ether_addr_equal(bssid, mgmt->bssid))
8d61ffa5 2583 return;
66e67e41
JB		 2584
2585 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2586 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2587 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2588
2589 if (auth_alg != ifmgd->auth_data->algorithm ||
0f4126e8
JM		 2590 auth_transaction != ifmgd->auth_data->expected_transaction) {
2591 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2592 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2593 auth_transaction,
2594 ifmgd->auth_data->expected_transaction);
8d61ffa5 2595 return;
0f4126e8 2596 }
66e67e41
JB		 2597
2598 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2599 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2600 mgmt->sa, status_code);
dac211ec 2601 ieee80211_destroy_auth_data(sdata, false);
6ff57cf8 2602 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
a9409093
EG		 2603 event.u.mlme.status = MLME_DENIED;
2604 event.u.mlme.reason = status_code;
2605 drv_event_callback(sdata->local, sdata, &event);
8d61ffa5 2606 return;
66e67e41
JB		 2607 }
2608
2609 switch (ifmgd->auth_data->algorithm) {
2610 case WLAN_AUTH_OPEN:
2611 case WLAN_AUTH_LEAP:
2612 case WLAN_AUTH_FT:
6b8ece3a 2613 case WLAN_AUTH_SAE:
66e67e41
JB		 2614 break;
2615 case WLAN_AUTH_SHARED_KEY:
2616 if (ifmgd->auth_data->expected_transaction != 4) {
2617 ieee80211_auth_challenge(sdata, mgmt, len);
2618 /* need another frame */
8d61ffa5 2619 return;
66e67e41
JB		 2620 }
2621 break;
2622 default:
2623 WARN_ONCE(1, "invalid auth alg %d",
2624 ifmgd->auth_data->algorithm);
8d61ffa5 2625 return;
66e67e41
JB		 2626 }
2627
a9409093
EG		 2628 event.u.mlme.status = MLME_SUCCESS;
2629 drv_event_callback(sdata->local, sdata, &event);
bdcbd8e0 2630 sdata_info(sdata, "authenticated\n");
66e67e41
JB		 2631 ifmgd->auth_data->done = true;
2632 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
89afe614 2633 ifmgd->auth_data->timeout_started = true;
8d61ffa5 2634 run_again(sdata, ifmgd->auth_data->timeout);
66e67e41 2635
6b8ece3a
JM		 2636 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2637 ifmgd->auth_data->expected_transaction != 2) {
2638 /*
2639 * Report auth frame to user space for processing since another
2640 * round of Authentication frames is still needed.
2641 */
6ff57cf8 2642 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
8d61ffa5 2643 return;
6b8ece3a
JM		 2644 }
2645
66e67e41
JB		 2646 /* move station state to auth */
2647 mutex_lock(&sdata->local->sta_mtx);
2648 sta = sta_info_get(sdata, bssid);
2649 if (!sta) {
2650 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2651 goto out_err;
2652 }
2653 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
bdcbd8e0 2654 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
66e67e41
JB		 2655 goto out_err;
2656 }
2657 mutex_unlock(&sdata->local->sta_mtx);
2658
6ff57cf8 2659 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
8d61ffa5 2660 return;
66e67e41
JB		 2661 out_err:
2662 mutex_unlock(&sdata->local->sta_mtx);
2663 /* ignore frame -- wait for timeout */
66e67e41
JB		 2664}
2665
dfa1ad29
CO		 2666#define case_WLAN(type) \
2667 case WLAN_REASON_##type: return #type
2668
2669static const char *ieee80211_get_reason_code_string(u16 reason_code)
2670{
2671 switch (reason_code) {
2672 case_WLAN(UNSPECIFIED);
2673 case_WLAN(PREV_AUTH_NOT_VALID);
2674 case_WLAN(DEAUTH_LEAVING);
2675 case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2676 case_WLAN(DISASSOC_AP_BUSY);
2677 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2678 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2679 case_WLAN(DISASSOC_STA_HAS_LEFT);
2680 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2681 case_WLAN(DISASSOC_BAD_POWER);
2682 case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2683 case_WLAN(INVALID_IE);
2684 case_WLAN(MIC_FAILURE);
2685 case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2686 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2687 case_WLAN(IE_DIFFERENT);
2688 case_WLAN(INVALID_GROUP_CIPHER);
2689 case_WLAN(INVALID_PAIRWISE_CIPHER);
2690 case_WLAN(INVALID_AKMP);
2691 case_WLAN(UNSUPP_RSN_VERSION);
2692 case_WLAN(INVALID_RSN_IE_CAP);
2693 case_WLAN(IEEE8021X_FAILED);
2694 case_WLAN(CIPHER_SUITE_REJECTED);
2695 case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2696 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2697 case_WLAN(DISASSOC_LOW_ACK);
2698 case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2699 case_WLAN(QSTA_LEAVE_QBSS);
2700 case_WLAN(QSTA_NOT_USE);
2701 case_WLAN(QSTA_REQUIRE_SETUP);
2702 case_WLAN(QSTA_TIMEOUT);
2703 case_WLAN(QSTA_CIPHER_NOT_SUPP);
2704 case_WLAN(MESH_PEER_CANCELED);
2705 case_WLAN(MESH_MAX_PEERS);
2706 case_WLAN(MESH_CONFIG);
2707 case_WLAN(MESH_CLOSE);
2708 case_WLAN(MESH_MAX_RETRIES);
2709 case_WLAN(MESH_CONFIRM_TIMEOUT);
2710 case_WLAN(MESH_INVALID_GTK);
2711 case_WLAN(MESH_INCONSISTENT_PARAM);
2712 case_WLAN(MESH_INVALID_SECURITY);
2713 case_WLAN(MESH_PATH_ERROR);
2714 case_WLAN(MESH_PATH_NOFORWARD);
2715 case_WLAN(MESH_PATH_DEST_UNREACHABLE);
2716 case_WLAN(MAC_EXISTS_IN_MBSS);
2717 case_WLAN(MESH_CHAN_REGULATORY);
2718 case_WLAN(MESH_CHAN);
2719 default: return "<unknown>";
2720 }
2721}
66e67e41 2722
8d61ffa5
JB		 2723static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2724 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2725{
46900298 2726 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
c9c99f89 2727 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
f0706e82 2728
8d61ffa5 2729 sdata_assert_lock(sdata);
66e67e41 2730
f4ea83dd 2731 if (len < 24 + 2)
8d61ffa5 2732 return;
f0706e82 2733
c9c99f89
JB		 2734 if (ifmgd->associated &&
2735 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) {
2736 const u8 *bssid = ifmgd->associated->bssid;
77fdaa12 2737
c9c99f89
JB		 2738 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
2739 bssid, reason_code,
2740 ieee80211_get_reason_code_string(reason_code));
f0706e82 2741
c9c99f89 2742 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
f0706e82 2743
c9c99f89
JB		 2744 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false,
2745 reason_code);
2746 return;
2747 }
77fdaa12 2748
c9c99f89
JB		 2749 if (ifmgd->assoc_data &&
2750 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
2751 const u8 *bssid = ifmgd->assoc_data->bss->bssid;
37ad3888 2752
c9c99f89
JB		 2753 sdata_info(sdata,
2754 "deauthenticated from %pM while associating (Reason: %u=%s)\n",
2755 bssid, reason_code,
2756 ieee80211_get_reason_code_string(reason_code));
2757
2758 ieee80211_destroy_assoc_data(sdata, false);
2759
2760 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2761 return;
2762 }
f0706e82
JB		 2763}
2764
2765
8d61ffa5
JB		 2766static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2767 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2768{
46900298 2769 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 2770 u16 reason_code;
2771
8d61ffa5 2772 sdata_assert_lock(sdata);
77fdaa12 2773
66e67e41 2774 if (len < 24 + 2)
8d61ffa5 2775 return;
77fdaa12 2776
66e67e41 2777 if (!ifmgd->associated ||
b203ca39 2778 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
8d61ffa5 2779 return;
f0706e82
JB		 2780
2781 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2782
bdcbd8e0
JB		 2783 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2784 mgmt->sa, reason_code);
f0706e82 2785
37ad3888
JB		 2786 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2787
a90faa9d 2788 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code);
f0706e82
JB		 2789}
2790
c74d084f
CL		 2791static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2792 u8 *supp_rates, unsigned int supp_rates_len,
2793 u32 *rates, u32 *basic_rates,
2794 bool *have_higher_than_11mbit,
2103dec1
SW		 2795 int *min_rate, int *min_rate_index,
2796 int shift, u32 rate_flags)
c74d084f
CL		 2797{
2798 int i, j;
2799
2800 for (i = 0; i < supp_rates_len; i++) {
2103dec1 2801 int rate = supp_rates[i] & 0x7f;
c74d084f
CL		 2802 bool is_basic = !!(supp_rates[i] & 0x80);
2803
2103dec1 2804 if ((rate * 5 * (1 << shift)) > 110)
c74d084f
CL		 2805 *have_higher_than_11mbit = true;
2806
2807 /*
2808 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2809 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2810 *
2811 * Note: Even through the membership selector and the basic
2812 * rate flag share the same bit, they are not exactly
2813 * the same.
2814 */
2815 if (!!(supp_rates[i] & 0x80) &&
2816 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2817 continue;
2818
2819 for (j = 0; j < sband->n_bitrates; j++) {
2103dec1
SW		 2820 struct ieee80211_rate *br;
2821 int brate;
2822
2823 br = &sband->bitrates[j];
2824 if ((rate_flags & br->flags) != rate_flags)
2825 continue;
2826
2827 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2828 if (brate == rate) {
c74d084f
CL		 2829 *rates |= BIT(j);
2830 if (is_basic)
2831 *basic_rates |= BIT(j);
2103dec1
SW		 2832 if ((rate * 5) < *min_rate) {
2833 *min_rate = rate * 5;
c74d084f
CL		 2834 *min_rate_index = j;
2835 }
2836 break;
2837 }
2838 }
2839 }
2840}
f0706e82 2841
66e67e41
JB		 2842static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2843 struct cfg80211_bss *cbss,
af6b6374 2844 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2845{
46900298 2846 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 2847 struct ieee80211_local *local = sdata->local;
8318d78a 2848 struct ieee80211_supported_band *sband;
f0706e82 2849 struct sta_info *sta;
af6b6374 2850 u8 *pos;
af6b6374 2851 u16 capab_info, aid;
f0706e82 2852 struct ieee802_11_elems elems;
bda3933a 2853 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
35d865af
JB		 2854 const struct cfg80211_bss_ies *bss_ies = NULL;
2855 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
ae5eb026 2856 u32 changed = 0;
c74d084f 2857 int err;
35d865af 2858 bool ret;
f0706e82 2859
af6b6374 2860 /* AssocResp and ReassocResp have identical structure */
f0706e82 2861
f0706e82 2862 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 2863 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 2864
1dd84aa2 2865 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
bdcbd8e0
JB		 2866 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2867 aid);
1dd84aa2
JB		 2868 aid &= ~(BIT(15) | BIT(14));
2869
05cb9108
JB		 2870 ifmgd->broken_ap = false;
2871
2872 if (aid == 0 || aid > IEEE80211_MAX_AID) {
bdcbd8e0
JB		 2873 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2874 aid);
05cb9108
JB		 2875 aid = 0;
2876 ifmgd->broken_ap = true;
2877 }
2878
af6b6374 2879 pos = mgmt->u.assoc_resp.variable;
b2e506bf 2880 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
af6b6374 2881
f0706e82 2882 if (!elems.supp_rates) {
bdcbd8e0 2883 sdata_info(sdata, "no SuppRates element in AssocResp\n");
af6b6374 2884 return false;
f0706e82
JB		 2885 }
2886
46900298 2887 ifmgd->aid = aid;
9041c1fa
AN		 2888 ifmgd->tdls_chan_switch_prohibited =
2889 elems.ext_capab && elems.ext_capab_len >= 5 &&
2890 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
f0706e82 2891
35d865af
JB		 2892 /*
2893 * Some APs are erroneously not including some information in their
2894 * (re)association response frames. Try to recover by using the data
2895 * from the beacon or probe response. This seems to afflict mobile
2896 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2897 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2898 */
2899 if ((assoc_data->wmm && !elems.wmm_param) ||
2900 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2901 (!elems.ht_cap_elem || !elems.ht_operation)) ||
2902 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2903 (!elems.vht_cap_elem || !elems.vht_operation))) {
2904 const struct cfg80211_bss_ies *ies;
2905 struct ieee802_11_elems bss_elems;
2906
2907 rcu_read_lock();
2908 ies = rcu_dereference(cbss->ies);
2909 if (ies)
2910 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2911 GFP_ATOMIC);
2912 rcu_read_unlock();
2913 if (!bss_ies)
2914 return false;
2915
2916 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2917 false, &bss_elems);
2918 if (assoc_data->wmm &&
2919 !elems.wmm_param && bss_elems.wmm_param) {
2920 elems.wmm_param = bss_elems.wmm_param;
2921 sdata_info(sdata,
2922 "AP bug: WMM param missing from AssocResp\n");
2923 }
2924
2925 /*
2926 * Also check if we requested HT/VHT, otherwise the AP doesn't
2927 * have to include the IEs in the (re)association response.
2928 */
2929 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2930 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2931 elems.ht_cap_elem = bss_elems.ht_cap_elem;
2932 sdata_info(sdata,
2933 "AP bug: HT capability missing from AssocResp\n");
2934 }
2935 if (!elems.ht_operation && bss_elems.ht_operation &&
2936 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2937 elems.ht_operation = bss_elems.ht_operation;
2938 sdata_info(sdata,
2939 "AP bug: HT operation missing from AssocResp\n");
2940 }
2941 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2942 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2943 elems.vht_cap_elem = bss_elems.vht_cap_elem;
2944 sdata_info(sdata,
2945 "AP bug: VHT capa missing from AssocResp\n");
2946 }
2947 if (!elems.vht_operation && bss_elems.vht_operation &&
2948 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2949 elems.vht_operation = bss_elems.vht_operation;
2950 sdata_info(sdata,
2951 "AP bug: VHT operation missing from AssocResp\n");
2952 }
2953 }
2954
30eb1dc2
JB		 2955 /*
2956 * We previously checked these in the beacon/probe response, so
2957 * they should be present here. This is just a safety net.
2958 */
2959 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2960 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2961 sdata_info(sdata,
35d865af
JB		 2962 "HT AP is missing WMM params or HT capability/operation\n");
2963 ret = false;
2964 goto out;
30eb1dc2
JB		 2965 }
2966
2967 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2968 (!elems.vht_cap_elem || !elems.vht_operation)) {
2969 sdata_info(sdata,
35d865af
JB		 2970 "VHT AP is missing VHT capability/operation\n");
2971 ret = false;
2972 goto out;
30eb1dc2
JB		 2973 }
2974
2a33bee2
GE		 2975 mutex_lock(&sdata->local->sta_mtx);
2976 /*
2977 * station info was already allocated and inserted before
2978 * the association and should be available to us
2979 */
7852e361 2980 sta = sta_info_get(sdata, cbss->bssid);
2a33bee2
GE		 2981 if (WARN_ON(!sta)) {
2982 mutex_unlock(&sdata->local->sta_mtx);
35d865af
JB		 2983 ret = false;
2984 goto out;
77fdaa12 2985 }
05e5e883 2986
55de908a 2987 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
f709fc69 2988
30eb1dc2 2989 /* Set up internal HT/VHT capabilities */
a8243b72 2990 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
ef96a842 2991 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
e1a0c6b3 2992 elems.ht_cap_elem, sta);
64f68e5d 2993
818255ea
MP		 2994 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2995 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
4a34215e 2996 elems.vht_cap_elem, sta);
818255ea 2997
30eb1dc2
JB		 2998 /*
2999 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
3000 * in their association response, so ignore that data for our own
3001 * configuration. If it changed since the last beacon, we'll get the
3002 * next beacon and update then.
3003 */
1128958d 3004
bee7f586
JB		 3005 /*
3006 * If an operating mode notification IE is present, override the
3007 * NSS calculation (that would be done in rate_control_rate_init())
3008 * and use the # of streams from that element.
3009 */
3010 if (elems.opmode_notif &&
3011 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
3012 u8 nss;
3013
3014 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
3015 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
3016 nss += 1;
3017 sta->sta.rx_nss = nss;
3018 }
3019
4b7679a5 3020 rate_control_rate_init(sta);
f0706e82 3021
93f0490e 3022 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) {
c2c98fde 3023 set_sta_flag(sta, WLAN_STA_MFP);
93f0490e
T		 3024 sta->sta.mfp = true;
3025 } else {
3026 sta->sta.mfp = false;
3027 }
5394af4d 3028
527871d7 3029 sta->sta.wme = elems.wmm_param && local->hw.queues >= IEEE80211_NUM_ACS;
ddf4ac53 3030
3e4d40fa 3031 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
c8987876
JB		 3032 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
3033 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
3034 if (err) {
bdcbd8e0
JB		 3035 sdata_info(sdata,
3036 "failed to move station %pM to desired state\n",
3037 sta->sta.addr);
c8987876
JB		 3038 WARN_ON(__sta_info_destroy(sta));
3039 mutex_unlock(&sdata->local->sta_mtx);
35d865af
JB		 3040 ret = false;
3041 goto out;
c8987876
JB		 3042 }
3043
7852e361 3044 mutex_unlock(&sdata->local->sta_mtx);
ddf4ac53 3045
f2176d72
JO		 3046 /*
3047 * Always handle WMM once after association regardless
3048 * of the first value the AP uses. Setting -1 here has
3049 * that effect because the AP values is an unsigned
3050 * 4-bit value.
3051 */
3052 ifmgd->wmm_last_param_set = -1;
3053
095d81ce 3054 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && elems.wmm_param)
4ced3f74 3055 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 3056 elems.wmm_param_len);
aa837e1d 3057 else
cec66283 3058 ieee80211_set_wmm_default(sdata, false, false);
3abead59 3059 changed |= BSS_CHANGED_QOS;
f0706e82 3060
60f8b39c
JB		 3061 /* set AID and assoc capability,
3062 * ieee80211_set_associated() will tell the driver */
3063 bss_conf->aid = aid;
3064 bss_conf->assoc_capability = capab_info;
0c1ad2ca 3065 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 3066
d524215f
FF		 3067 /*
3068 * If we're using 4-addr mode, let the AP know that we're
3069 * doing so, so that it can create the STA VLAN on its side
3070 */
3071 if (ifmgd->use_4addr)
3072 ieee80211_send_4addr_nullfunc(local, sdata);
3073
15b7b062 3074 /*
b291ba11
JB		 3075 * Start timer to probe the connection to the AP now.
3076 * Also start the timer that will detect beacon loss.
15b7b062 3077 */
b291ba11 3078 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 3079 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 3080
35d865af
JB		 3081 ret = true;
3082 out:
3083 kfree(bss_ies);
3084 return ret;
f0706e82
JB		 3085}
3086
8d61ffa5
JB		 3087static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
3088 struct ieee80211_mgmt *mgmt,
3089 size_t len)
66e67e41
JB		 3090{
3091 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3092 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3093 u16 capab_info, status_code, aid;
3094 struct ieee802_11_elems elems;
b0b6aa2c 3095 int ac, uapsd_queues = -1;
66e67e41
JB		 3096 u8 *pos;
3097 bool reassoc;
8d61ffa5 3098 struct cfg80211_bss *bss;
d0d1a12f
EG		 3099 struct ieee80211_event event = {
3100 .type = MLME_EVENT,
3101 .u.mlme.data = ASSOC_EVENT,
3102 };
66e67e41 3103
8d61ffa5 3104 sdata_assert_lock(sdata);
66e67e41
JB		 3105
3106 if (!assoc_data)
8d61ffa5 3107 return;
b203ca39 3108 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
8d61ffa5 3109 return;
66e67e41
JB		 3110
3111 /*
3112 * AssocResp and ReassocResp have identical structure, so process both
3113 * of them in this function.
3114 */
3115
3116 if (len < 24 + 6)
8d61ffa5 3117 return;
66e67e41
JB		 3118
3119 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
3120 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3121 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
3122 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3123
bdcbd8e0
JB		 3124 sdata_info(sdata,
3125 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3126 reassoc ? "Rea" : "A", mgmt->sa,
3127 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
66e67e41
JB		 3128
3129 pos = mgmt->u.assoc_resp.variable;
b2e506bf 3130 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
66e67e41
JB		 3131
3132 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
79ba1d89
JB		 3133 elems.timeout_int &&
3134 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
66e67e41 3135 u32 tu, ms;
79ba1d89 3136 tu = le32_to_cpu(elems.timeout_int->value);
66e67e41 3137 ms = tu * 1024 / 1000;
bdcbd8e0
JB		 3138 sdata_info(sdata,
3139 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3140 mgmt->sa, tu, ms);
66e67e41 3141 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
89afe614 3142 assoc_data->timeout_started = true;
66e67e41 3143 if (ms > IEEE80211_ASSOC_TIMEOUT)
8d61ffa5
JB		 3144 run_again(sdata, assoc_data->timeout);
3145 return;
66e67e41
JB		 3146 }
3147
8d61ffa5 3148 bss = assoc_data->bss;
66e67e41
JB		 3149
3150 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 3151 sdata_info(sdata, "%pM denied association (code=%d)\n",
3152 mgmt->sa, status_code);
66e67e41 3153 ieee80211_destroy_assoc_data(sdata, false);
d0d1a12f
EG		 3154 event.u.mlme.status = MLME_DENIED;
3155 event.u.mlme.reason = status_code;
3156 drv_event_callback(sdata->local, sdata, &event);
66e67e41 3157 } else {
8d61ffa5 3158 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
66e67e41 3159 /* oops -- internal error -- send timeout for now */
10a9109f 3160 ieee80211_destroy_assoc_data(sdata, false);
959867fa 3161 cfg80211_assoc_timeout(sdata->dev, bss);
8d61ffa5 3162 return;
66e67e41 3163 }
d0d1a12f
EG		 3164 event.u.mlme.status = MLME_SUCCESS;
3165 drv_event_callback(sdata->local, sdata, &event);
635d999f 3166 sdata_info(sdata, "associated\n");
79ebfb85
JB		 3167
3168 /*
3169 * destroy assoc_data afterwards, as otherwise an idle
3170 * recalc after assoc_data is NULL but before associated
3171 * is set can cause the interface to go idle
3172 */
3173 ieee80211_destroy_assoc_data(sdata, true);
b0b6aa2c
EP		 3174
3175 /* get uapsd queues configuration */
3176 uapsd_queues = 0;
3177 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
3178 if (sdata->tx_conf[ac].uapsd)
3179 uapsd_queues |= BIT(ac);
66e67e41
JB		 3180 }
3181
b0b6aa2c 3182 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues);
66e67e41 3183}
8e3c1b77 3184
98c8fccf 3185static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
8e3c1b77 3186 struct ieee80211_mgmt *mgmt, size_t len,
98c8fccf 3187 struct ieee80211_rx_status *rx_status,
d45c4172 3188 struct ieee802_11_elems *elems)
98c8fccf
JB		 3189{
3190 struct ieee80211_local *local = sdata->local;
c2b13452 3191 struct ieee80211_bss *bss;
98c8fccf 3192 struct ieee80211_channel *channel;
56007a02 3193
8d61ffa5 3194 sdata_assert_lock(sdata);
b4f286a1 3195
3afc2167
EG		 3196 channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
3197 if (!channel)
98c8fccf
JB		 3198 return;
3199
98c8fccf 3200 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
d45c4172 3201 channel);
817cee76 3202 if (bss) {
817cee76 3203 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
d2722f8b 3204 ieee80211_rx_bss_put(local, bss);
817cee76 3205 }
f0706e82
JB		 3206}
3207
3208
f698d856 3209static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 3210 struct sk_buff *skb)
f0706e82 3211{
af6b6374 3212 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 3213 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 3214 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
3215 size_t baselen, len = skb->len;
ae6a44e3
EK		 3216 struct ieee802_11_elems elems;
3217
15b7b062
KV		 3218 ifmgd = &sdata->u.mgd;
3219
8d61ffa5 3220 sdata_assert_lock(sdata);
77fdaa12 3221
b203ca39 3222 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
8e7cdbb6
TW		 3223 return; /* ignore ProbeResp to foreign address */
3224
ae6a44e3
EK		 3225 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
3226 if (baselen > len)
3227 return;
3228
3229 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
b2e506bf 3230 false, &elems);
ae6a44e3 3231
d45c4172 3232 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
9859b81e 3233
77fdaa12 3234 if (ifmgd->associated &&
b203ca39 3235 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
4e5ff376 3236 ieee80211_reset_ap_probe(sdata);
f0706e82
JB		 3237}
3238
d91f36db
JB		 3239/*
3240 * This is the canonical list of information elements we care about,
3241 * the filter code also gives us all changes to the Microsoft OUI
c8d65917
SG		 3242 * (00:50:F2) vendor IE which is used for WMM which we need to track,
3243 * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3244 * changes to requested client power.
d91f36db
JB		 3245 *
3246 * We implement beacon filtering in software since that means we can
3247 * avoid processing the frame here and in cfg80211, and userspace
3248 * will not be able to tell whether the hardware supports it or not.
3249 *
3250 * XXX: This list needs to be dynamic -- userspace needs to be able to
3251 * add items it requires. It also needs to be able to tell us to
3252 * look out for other vendor IEs.
3253 */
3254static const u64 care_about_ies =
1d4df3a5
JB		 3255 (1ULL << WLAN_EID_COUNTRY) |
3256 (1ULL << WLAN_EID_ERP_INFO) |
3257 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
3258 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
3259 (1ULL << WLAN_EID_HT_CAPABILITY) |
70a3fd6c
JB		 3260 (1ULL << WLAN_EID_HT_OPERATION) |
3261 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN);
d91f36db 3262
8d61ffa5
JB		 3263static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
3264 struct ieee80211_mgmt *mgmt, size_t len,
3265 struct ieee80211_rx_status *rx_status)
f0706e82 3266{
d91f36db 3267 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 3268 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 3269 size_t baselen;
3270 struct ieee802_11_elems elems;
f698d856 3271 struct ieee80211_local *local = sdata->local;
55de908a
JB		 3272 struct ieee80211_chanctx_conf *chanctx_conf;
3273 struct ieee80211_channel *chan;
bee7f586 3274 struct sta_info *sta;
471b3efd 3275 u32 changed = 0;
f87ad637 3276 bool erp_valid;
7a5158ef 3277 u8 erp_value = 0;
d91f36db 3278 u32 ncrc;
77fdaa12 3279 u8 *bssid;
8d61ffa5 3280 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
77fdaa12 3281
8d61ffa5 3282 sdata_assert_lock(sdata);
f0706e82 3283
ae6a44e3
EK		 3284 /* Process beacon from the current BSS */
3285 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3286 if (baselen > len)
8d61ffa5 3287 return;
ae6a44e3 3288
55de908a
JB		 3289 rcu_read_lock();
3290 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3291 if (!chanctx_conf) {
3292 rcu_read_unlock();
8d61ffa5 3293 return;
55de908a
JB		 3294 }
3295
4bf88530 3296 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
55de908a 3297 rcu_read_unlock();
8d61ffa5 3298 return;
55de908a 3299 }
4bf88530 3300 chan = chanctx_conf->def.chan;
55de908a 3301 rcu_read_unlock();
f0706e82 3302
c65dd147 3303 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
b203ca39 3304 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
66e67e41 3305 ieee802_11_parse_elems(mgmt->u.beacon.variable,
b2e506bf 3306 len - baselen, false, &elems);
77fdaa12 3307
d45c4172 3308 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
482a9c74
AB		 3309 if (elems.tim && !elems.parse_error) {
3310 const struct ieee80211_tim_ie *tim_ie = elems.tim;
3311 ifmgd->dtim_period = tim_ie->dtim_period;
3312 }
989c6505 3313 ifmgd->have_beacon = true;
c65dd147 3314 ifmgd->assoc_data->need_beacon = false;
30686bf7 3315 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
ef429dad
JB		 3316 sdata->vif.bss_conf.sync_tsf =
3317 le64_to_cpu(mgmt->u.beacon.timestamp);
3318 sdata->vif.bss_conf.sync_device_ts =
3319 rx_status->device_timestamp;
3320 if (elems.tim)
3321 sdata->vif.bss_conf.sync_dtim_count =
3322 elems.tim->dtim_count;
3323 else
3324 sdata->vif.bss_conf.sync_dtim_count = 0;
3325 }
66e67e41
JB		 3326 /* continue assoc process */
3327 ifmgd->assoc_data->timeout = jiffies;
89afe614 3328 ifmgd->assoc_data->timeout_started = true;
8d61ffa5
JB		 3329 run_again(sdata, ifmgd->assoc_data->timeout);
3330 return;
66e67e41 3331 }
77fdaa12 3332
66e67e41 3333 if (!ifmgd->associated ||
b203ca39 3334 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
8d61ffa5 3335 return;
66e67e41 3336 bssid = ifmgd->associated->bssid;
f0706e82 3337
17e4ec14 3338 /* Track average RSSI from the Beacon frames of the current AP */
17e4ec14
JM		 3339 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3340 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
338c17ae 3341 ewma_beacon_signal_init(&ifmgd->ave_beacon_signal);
17e4ec14 3342 ifmgd->last_cqm_event_signal = 0;
391a200a 3343 ifmgd->count_beacon_signal = 1;
615f7b9b 3344 ifmgd->last_ave_beacon_signal = 0;
17e4ec14 3345 } else {
391a200a 3346 ifmgd->count_beacon_signal++;
17e4ec14 3347 }
615f7b9b 3348
338c17ae
JB		 3349 ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal);
3350
615f7b9b
MV		 3351 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3352 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
338c17ae 3353 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
615f7b9b 3354 int last_sig = ifmgd->last_ave_beacon_signal;
a8182929
EG		 3355 struct ieee80211_event event = {
3356 .type = RSSI_EVENT,
3357 };
615f7b9b
MV		 3358
3359 /*
3360 * if signal crosses either of the boundaries, invoke callback
3361 * with appropriate parameters
3362 */
3363 if (sig > ifmgd->rssi_max_thold &&
3364 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3365 ifmgd->last_ave_beacon_signal = sig;
a8182929
EG		 3366 event.u.rssi.data = RSSI_EVENT_HIGH;
3367 drv_event_callback(local, sdata, &event);
615f7b9b
MV		 3368 } else if (sig < ifmgd->rssi_min_thold &&
3369 (last_sig >= ifmgd->rssi_max_thold ||
3370 last_sig == 0)) {
3371 ifmgd->last_ave_beacon_signal = sig;
a8182929
EG		 3372 event.u.rssi.data = RSSI_EVENT_LOW;
3373 drv_event_callback(local, sdata, &event);
615f7b9b
MV		 3374 }
3375 }
3376
17e4ec14 3377 if (bss_conf->cqm_rssi_thold &&
391a200a 3378 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
ea086359 3379 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
338c17ae 3380 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
17e4ec14
JM		 3381 int last_event = ifmgd->last_cqm_event_signal;
3382 int thold = bss_conf->cqm_rssi_thold;
3383 int hyst = bss_conf->cqm_rssi_hyst;
338c17ae 3384
17e4ec14
JM		 3385 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_LOW,
3391 GFP_KERNEL);
3392 } else if (sig > thold &&
3393 (last_event == 0 || sig > last_event + hyst)) {
3394 ifmgd->last_cqm_event_signal = sig;
3395 ieee80211_cqm_rssi_notify(
3396 &sdata->vif,
3397 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3398 GFP_KERNEL);
3399 }
3400 }
3401
392b9ffb 3402 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
bdcbd8e0 3403 mlme_dbg_ratelimited(sdata,
112c31f0 3404 "cancelling AP probe due to a received beacon\n");
392b9ffb 3405 ieee80211_reset_ap_probe(sdata);
92778180
JM		 3406 }
3407
b291ba11
JB		 3408 /*
3409 * Push the beacon loss detection into the future since
3410 * we are processing a beacon from the AP just now.
3411 */
d3a910a8 3412 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 3413
d91f36db
JB		 3414 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3415 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
b2e506bf 3416 len - baselen, false, &elems,
d91f36db
JB		 3417 care_about_ies, ncrc);
3418
90d13e8f
JB		 3419 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
3420 ieee80211_check_tim(elems.tim, elems.tim_len, ifmgd->aid)) {
3421 if (local->hw.conf.dynamic_ps_timeout > 0) {
3422 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3423 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3424 ieee80211_hw_config(local,
3425 IEEE80211_CONF_CHANGE_PS);
572e0012 3426 }
076cdcb1 3427 ieee80211_send_nullfunc(local, sdata, false);
90d13e8f
JB		 3428 } else if (!local->pspolling && sdata->u.mgd.powersave) {
3429 local->pspolling = true;
3430
3431 /*
3432 * Here is assumed that the driver will be
3433 * able to send ps-poll frame and receive a
3434 * response even though power save mode is
3435 * enabled, but some drivers might require
3436 * to disable power save here. This needs
3437 * to be investigated.
3438 */
3439 ieee80211_send_pspoll(local, sdata);
a97b77b9
VN		 3440 }
3441 }
7a5158ef 3442
488dd7b5 3443 if (sdata->vif.p2p) {
67baf663 3444 struct ieee80211_p2p_noa_attr noa = {};
488dd7b5
JB		 3445 int ret;
3446
3447 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3448 len - baselen,
3449 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
934457ee 3450 (u8 *) &noa, sizeof(noa));
67baf663
JD		 3451 if (ret >= 2) {
3452 if (sdata->u.mgd.p2p_noa_index != noa.index) {
3453 /* valid noa_attr and index changed */
3454 sdata->u.mgd.p2p_noa_index = noa.index;
3455 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3456 changed |= BSS_CHANGED_P2P_PS;
3457 /*
3458 * make sure we update all information, the CRC
3459 * mechanism doesn't look at P2P attributes.
3460 */
3461 ifmgd->beacon_crc_valid = false;
3462 }
3463 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3464 /* noa_attr not found and we had valid noa_attr before */
3465 sdata->u.mgd.p2p_noa_index = -1;
3466 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
488dd7b5 3467 changed |= BSS_CHANGED_P2P_PS;
488dd7b5
JB		 3468 ifmgd->beacon_crc_valid = false;
3469 }
3470 }
3471
0c21e632
LC		 3472 if (ifmgd->csa_waiting_bcn)
3473 ieee80211_chswitch_post_beacon(sdata);
3474
2ecc3905
AB		 3475 /*
3476 * Update beacon timing and dtim count on every beacon appearance. This
3477 * will allow the driver to use the most updated values. Do it before
3478 * comparing this one with last received beacon.
3479 * IMPORTANT: These parameters would possibly be out of sync by the time
3480 * the driver will use them. The synchronized view is currently
3481 * guaranteed only in certain callbacks.
3482 */
30686bf7 3483 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
2ecc3905
AB		 3484 sdata->vif.bss_conf.sync_tsf =
3485 le64_to_cpu(mgmt->u.beacon.timestamp);
3486 sdata->vif.bss_conf.sync_device_ts =
3487 rx_status->device_timestamp;
3488 if (elems.tim)
3489 sdata->vif.bss_conf.sync_dtim_count =
3490 elems.tim->dtim_count;
3491 else
3492 sdata->vif.bss_conf.sync_dtim_count = 0;
3493 }
3494
d8ec4433 3495 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
8d61ffa5 3496 return;
30196673 3497 ifmgd->beacon_crc = ncrc;
d8ec4433 3498 ifmgd->beacon_crc_valid = true;
30196673 3499
d45c4172 3500 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
7d25745d 3501
d70b7616 3502 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
2ba45384 3503 rx_status->device_timestamp,
d70b7616
JB		 3504 &elems, true);
3505
095d81ce
JB		 3506 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3507 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
7d25745d
JB		 3508 elems.wmm_param_len))
3509 changed |= BSS_CHANGED_QOS;
3510
c65dd147
EG		 3511 /*
3512 * If we haven't had a beacon before, tell the driver about the
ef429dad 3513 * DTIM period (and beacon timing if desired) now.
c65dd147 3514 */
989c6505 3515 if (!ifmgd->have_beacon) {
c65dd147
EG		 3516 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3517 if (elems.tim)
3518 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3519 else
3520 bss_conf->dtim_period = 1;
ef429dad 3521
989c6505
AB		 3522 changed |= BSS_CHANGED_BEACON_INFO;
3523 ifmgd->have_beacon = true;
482a9c74
AB		 3524
3525 mutex_lock(&local->iflist_mtx);
4a733ef1 3526 ieee80211_recalc_ps(local);
482a9c74
AB		 3527 mutex_unlock(&local->iflist_mtx);
3528
ce857888 3529 ieee80211_recalc_ps_vif(sdata);
c65dd147
EG		 3530 }
3531
1946bed9 3532 if (elems.erp_info) {
7a5158ef
JB		 3533 erp_valid = true;
3534 erp_value = elems.erp_info[0];
3535 } else {
3536 erp_valid = false;
50c4afb9 3537 }
7a5158ef
JB		 3538 changed |= ieee80211_handle_bss_capability(sdata,
3539 le16_to_cpu(mgmt->u.beacon.capab_info),
3540 erp_valid, erp_value);
f0706e82 3541
1128958d 3542 mutex_lock(&local->sta_mtx);
bee7f586
JB		 3543 sta = sta_info_get(sdata, bssid);
3544
53b954ee
EP		 3545 if (ieee80211_config_bw(sdata, sta,
3546 elems.ht_cap_elem, elems.ht_operation,
30eb1dc2
JB		 3547 elems.vht_operation, bssid, &changed)) {
3548 mutex_unlock(&local->sta_mtx);
3549 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3550 WLAN_REASON_DEAUTH_LEAVING,
3551 true, deauth_buf);
a90faa9d
EG		 3552 ieee80211_report_disconnect(sdata, deauth_buf,
3553 sizeof(deauth_buf), true,
3554 WLAN_REASON_DEAUTH_LEAVING);
8d61ffa5 3555 return;
30eb1dc2 3556 }
bee7f586
JB		 3557
3558 if (sta && elems.opmode_notif)
3559 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3560 rx_status->band, true);
1128958d 3561 mutex_unlock(&local->sta_mtx);
d3c990fb 3562
24a4e400
SG		 3563 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
3564 elems.country_elem,
3565 elems.country_elem_len,
c8d65917
SG		 3566 elems.pwr_constr_elem,
3567 elems.cisco_dtpc_elem);
3f2355cb 3568
471b3efd 3569 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 3570}
3571
1fa57d01
JB		 3572void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3573 struct sk_buff *skb)
f0706e82
JB		 3574{
3575 struct ieee80211_rx_status *rx_status;
f0706e82
JB		 3576 struct ieee80211_mgmt *mgmt;
3577 u16 fc;
1b3a2e49
JB		 3578 struct ieee802_11_elems elems;
3579 int ies_len;
f0706e82 3580
f0706e82
JB		 3581 rx_status = (struct ieee80211_rx_status *) skb->cb;
3582 mgmt = (struct ieee80211_mgmt *) skb->data;
3583 fc = le16_to_cpu(mgmt->frame_control);
3584
8d61ffa5 3585 sdata_lock(sdata);
77fdaa12 3586
66e67e41
JB		 3587 switch (fc & IEEE80211_FCTL_STYPE) {
3588 case IEEE80211_STYPE_BEACON:
8d61ffa5 3589 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
66e67e41
JB		 3590 break;
3591 case IEEE80211_STYPE_PROBE_RESP:
3592 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3593 break;
3594 case IEEE80211_STYPE_AUTH:
8d61ffa5 3595 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
66e67e41
JB		 3596 break;
3597 case IEEE80211_STYPE_DEAUTH:
8d61ffa5 3598 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
66e67e41
JB		 3599 break;
3600 case IEEE80211_STYPE_DISASSOC:
8d61ffa5 3601 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
66e67e41
JB		 3602 break;
3603 case IEEE80211_STYPE_ASSOC_RESP:
3604 case IEEE80211_STYPE_REASSOC_RESP:
8d61ffa5 3605 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
66e67e41
JB		 3606 break;
3607 case IEEE80211_STYPE_ACTION:
37799e52 3608 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
1b3a2e49
JB		 3609 ies_len = skb->len -
3610 offsetof(struct ieee80211_mgmt,
3611 u.action.u.chan_switch.variable);
37799e52
JB		 3612
3613 if (ies_len < 0)
3614 break;
3615
3616 ieee802_11_parse_elems(
3617 mgmt->u.action.u.chan_switch.variable,
b2e506bf 3618 ies_len, true, &elems);
37799e52
JB		 3619
3620 if (elems.parse_error)
3621 break;
3622
1b3a2e49 3623 ieee80211_sta_process_chanswitch(sdata,
2ba45384
LC		 3624 rx_status->mactime,
3625 rx_status->device_timestamp,
3626 &elems, false);
1b3a2e49
JB		 3627 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3628 ies_len = skb->len -
3629 offsetof(struct ieee80211_mgmt,
3630 u.action.u.ext_chan_switch.variable);
3631
3632 if (ies_len < 0)
3633 break;
3634
3635 ieee802_11_parse_elems(
3636 mgmt->u.action.u.ext_chan_switch.variable,
b2e506bf 3637 ies_len, true, &elems);
1b3a2e49
JB		 3638
3639 if (elems.parse_error)
3640 break;
3641
3642 /* for the handling code pretend this was also an IE */
3643 elems.ext_chansw_ie =
3644 &mgmt->u.action.u.ext_chan_switch.data;
3645
66e67e41 3646 ieee80211_sta_process_chanswitch(sdata,
2ba45384
LC		 3647 rx_status->mactime,
3648 rx_status->device_timestamp,
3649 &elems, false);
77fdaa12 3650 }
37799e52 3651 break;
77fdaa12 3652 }
8d61ffa5 3653 sdata_unlock(sdata);
f0706e82
JB		 3654}
3655
9c6bd790 3656static void ieee80211_sta_timer(unsigned long data)
f0706e82 3657{
60f8b39c
JB		 3658 struct ieee80211_sub_if_data *sdata =
3659 (struct ieee80211_sub_if_data *) data;
5bb644a0 3660
9b7d72c1 3661 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
f0706e82
JB		 3662}
3663
04ac3c0e 3664static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
6b684db1 3665 u8 *bssid, u8 reason, bool tx)
04ac3c0e 3666{
6ae16775 3667 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
04ac3c0e 3668
37ad3888 3669 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
6b684db1 3670 tx, frame_buf);
37ad3888 3671
a90faa9d
EG		 3672 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
3673 reason);
04ac3c0e
FF		 3674}
3675
46cad4b7 3676static int ieee80211_auth(struct ieee80211_sub_if_data *sdata)
66e67e41
JB		 3677{
3678 struct ieee80211_local *local = sdata->local;
3679 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3680 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
1672c0e3 3681 u32 tx_flags = 0;
46cad4b7
JB		 3682 u16 trans = 1;
3683 u16 status = 0;
66e67e41 3684
8d61ffa5 3685 sdata_assert_lock(sdata);
66e67e41
JB		 3686
3687 if (WARN_ON_ONCE(!auth_data))
3688 return -EINVAL;
3689
66e67e41
JB		 3690 auth_data->tries++;
3691
3692 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
bdcbd8e0
JB		 3693 sdata_info(sdata, "authentication with %pM timed out\n",
3694 auth_data->bss->bssid);
66e67e41
JB		 3695
3696 /*
3697 * Most likely AP is not in the range so remove the
3698 * bss struct for that AP.
3699 */
3700 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3701
3702 return -ETIMEDOUT;
3703 }
3704
a1845fc7
JB		 3705 drv_mgd_prepare_tx(local, sdata);
3706
46cad4b7
JB		 3707 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3708 auth_data->bss->bssid, auth_data->tries,
3709 IEEE80211_AUTH_MAX_TRIES);
66e67e41 3710
46cad4b7 3711 auth_data->expected_transaction = 2;
6b8ece3a 3712
46cad4b7
JB		 3713 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3714 trans = auth_data->sae_trans;
3715 status = auth_data->sae_status;
3716 auth_data->expected_transaction = trans;
3717 }
66e67e41 3718
46cad4b7
JB		 3719 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
3720 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3721 IEEE80211_TX_INTFL_MLME_CONN_TX;
66e67e41 3722
46cad4b7
JB		 3723 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3724 auth_data->data, auth_data->data_len,
3725 auth_data->bss->bssid,
3726 auth_data->bss->bssid, NULL, 0, 0,
3727 tx_flags);
66e67e41 3728
6211dd12 3729 if (tx_flags == 0) {
1672c0e3 3730 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
cb236d2d 3731 auth_data->timeout_started = true;
8d61ffa5 3732 run_again(sdata, auth_data->timeout);
89afe614 3733 } else {
cb236d2d
JB		 3734 auth_data->timeout =
3735 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3736 auth_data->timeout_started = true;
3737 run_again(sdata, auth_data->timeout);
1672c0e3 3738 }
66e67e41
JB		 3739
3740 return 0;
3741}
3742
3743static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3744{
3745 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3746 struct ieee80211_local *local = sdata->local;
3747
8d61ffa5 3748 sdata_assert_lock(sdata);
66e67e41 3749
66e67e41
JB		 3750 assoc_data->tries++;
3751 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
bdcbd8e0
JB		 3752 sdata_info(sdata, "association with %pM timed out\n",
3753 assoc_data->bss->bssid);
66e67e41
JB		 3754
3755 /*
3756 * Most likely AP is not in the range so remove the
3757 * bss struct for that AP.
3758 */
3759 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3760
3761 return -ETIMEDOUT;
3762 }
3763
bdcbd8e0
JB		 3764 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3765 assoc_data->bss->bssid, assoc_data->tries,
3766 IEEE80211_ASSOC_MAX_TRIES);
66e67e41
JB		 3767 ieee80211_send_assoc(sdata);
3768
30686bf7 3769 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
1672c0e3 3770 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
89afe614 3771 assoc_data->timeout_started = true;
8d61ffa5 3772 run_again(sdata, assoc_data->timeout);
89afe614 3773 } else {
cb236d2d
JB		 3774 assoc_data->timeout =
3775 round_jiffies_up(jiffies +
3776 IEEE80211_ASSOC_TIMEOUT_LONG);
3777 assoc_data->timeout_started = true;
3778 run_again(sdata, assoc_data->timeout);
1672c0e3 3779 }
66e67e41
JB		 3780
3781 return 0;
3782}
3783
1672c0e3
JB		 3784void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3785 __le16 fc, bool acked)
3786{
3787 struct ieee80211_local *local = sdata->local;
3788
3789 sdata->u.mgd.status_fc = fc;
3790 sdata->u.mgd.status_acked = acked;
3791 sdata->u.mgd.status_received = true;
3792
3793 ieee80211_queue_work(&local->hw, &sdata->work);
3794}
3795
1fa57d01 3796void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 3797{
9c6bd790 3798 struct ieee80211_local *local = sdata->local;
1fa57d01 3799 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 3800
8d61ffa5 3801 sdata_lock(sdata);
77fdaa12 3802
1672c0e3
JB		 3803 if (ifmgd->status_received) {
3804 __le16 fc = ifmgd->status_fc;
3805 bool status_acked = ifmgd->status_acked;
3806
3807 ifmgd->status_received = false;
46cad4b7 3808 if (ifmgd->auth_data && ieee80211_is_auth(fc)) {
1672c0e3
JB		 3809 if (status_acked) {
3810 ifmgd->auth_data->timeout =
3811 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
8d61ffa5 3812 run_again(sdata, ifmgd->auth_data->timeout);
1672c0e3
JB		 3813 } else {
3814 ifmgd->auth_data->timeout = jiffies - 1;
3815 }
89afe614 3816 ifmgd->auth_data->timeout_started = true;
1672c0e3
JB		 3817 } else if (ifmgd->assoc_data &&
3818 (ieee80211_is_assoc_req(fc) ||
3819 ieee80211_is_reassoc_req(fc))) {
3820 if (status_acked) {
3821 ifmgd->assoc_data->timeout =
3822 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
8d61ffa5 3823 run_again(sdata, ifmgd->assoc_data->timeout);
1672c0e3
JB		 3824 } else {
3825 ifmgd->assoc_data->timeout = jiffies - 1;
3826 }
89afe614 3827 ifmgd->assoc_data->timeout_started = true;
1672c0e3
JB		 3828 }
3829 }
3830
89afe614 3831 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
66e67e41
JB		 3832 time_after(jiffies, ifmgd->auth_data->timeout)) {
3833 if (ifmgd->auth_data->done) {
3834 /*
3835 * ok ... we waited for assoc but userspace didn't,
3836 * so let's just kill the auth data
3837 */
3838 ieee80211_destroy_auth_data(sdata, false);
46cad4b7 3839 } else if (ieee80211_auth(sdata)) {
66e67e41 3840 u8 bssid[ETH_ALEN];
a9409093
EG		 3841 struct ieee80211_event event = {
3842 .type = MLME_EVENT,
3843 .u.mlme.data = AUTH_EVENT,
3844 .u.mlme.status = MLME_TIMEOUT,
3845 };
66e67e41
JB		 3846
3847 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3848
3849 ieee80211_destroy_auth_data(sdata, false);
3850
6ff57cf8 3851 cfg80211_auth_timeout(sdata->dev, bssid);
a9409093 3852 drv_event_callback(sdata->local, sdata, &event);
66e67e41 3853 }
89afe614 3854 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
8d61ffa5 3855 run_again(sdata, ifmgd->auth_data->timeout);
66e67e41 3856
89afe614 3857 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
66e67e41 3858 time_after(jiffies, ifmgd->assoc_data->timeout)) {
989c6505 3859 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
66e67e41 3860 ieee80211_do_assoc(sdata)) {
959867fa 3861 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
d0d1a12f
EG		 3862 struct ieee80211_event event = {
3863 .type = MLME_EVENT,
3864 .u.mlme.data = ASSOC_EVENT,
3865 .u.mlme.status = MLME_TIMEOUT,
3866 };
66e67e41
JB		 3867
3868 ieee80211_destroy_assoc_data(sdata, false);
959867fa 3869 cfg80211_assoc_timeout(sdata->dev, bss);
d0d1a12f 3870 drv_event_callback(sdata->local, sdata, &event);
66e67e41 3871 }
89afe614 3872 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
8d61ffa5 3873 run_again(sdata, ifmgd->assoc_data->timeout);
66e67e41 3874
392b9ffb 3875 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
b291ba11 3876 ifmgd->associated) {
a43abf29 3877 u8 bssid[ETH_ALEN];
72a8a3ed 3878 int max_tries;
a43abf29 3879
0c1ad2ca 3880 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 3881
30686bf7 3882 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
180205bd 3883 max_tries = max_nullfunc_tries;
72a8a3ed 3884 else
180205bd 3885 max_tries = max_probe_tries;
72a8a3ed 3886
4e5ff376
FF		 3887 /* ACK received for nullfunc probing frame */
3888 if (!ifmgd->probe_send_count)
3889 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 3890 else if (ifmgd->nullfunc_failed) {
3891 if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3892 mlme_dbg(sdata,
3893 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3894 bssid, ifmgd->probe_send_count,
3895 max_tries);
04ac3c0e
FF		 3896 ieee80211_mgd_probe_ap_send(sdata);
3897 } else {
bdcbd8e0
JB		 3898 mlme_dbg(sdata,
3899 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3900 bssid);
95acac61 3901 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1
JB		 3902 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3903 false);
04ac3c0e
FF		 3904 }
3905 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
8d61ffa5 3906 run_again(sdata, ifmgd->probe_timeout);
30686bf7 3907 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
bdcbd8e0
JB		 3908 mlme_dbg(sdata,
3909 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3910 bssid, probe_wait_ms);
95acac61 3911 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 3912 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
04ac3c0e 3913 } else if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3914 mlme_dbg(sdata,
3915 "No probe response from AP %pM after %dms, try %d/%i\n",
3916 bssid, probe_wait_ms,
3917 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 3918 ieee80211_mgd_probe_ap_send(sdata);
3919 } else {
b291ba11
JB		 3920 /*
3921 * We actually lost the connection ... or did we?
3922 * Let's make sure!
3923 */
b38afa87
BG		 3924 wiphy_debug(local->hw.wiphy,
3925 "%s: No probe response from AP %pM"
3926 " after %dms, disconnecting.\n",
3927 sdata->name,
180205bd 3928 bssid, probe_wait_ms);
04ac3c0e 3929
95acac61 3930 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 3931 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
b291ba11
JB		 3932 }
3933 }
3934
8d61ffa5 3935 sdata_unlock(sdata);
f0706e82
JB		 3936}
3937
b291ba11
JB		 3938static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3939{
3940 struct ieee80211_sub_if_data *sdata =
3941 (struct ieee80211_sub_if_data *) data;
0c21e632 3942 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 3943
0c21e632 3944 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
e5593f56
MK		 3945 return;
3946
682bd38b 3947 sdata->u.mgd.connection_loss = false;
1e4dcd01
JO		 3948 ieee80211_queue_work(&sdata->local->hw,
3949 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 3950}
3951
3952static void ieee80211_sta_conn_mon_timer(unsigned long data)
3953{
3954 struct ieee80211_sub_if_data *sdata =
3955 (struct ieee80211_sub_if_data *) data;
3956 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3957 struct ieee80211_local *local = sdata->local;
3958
0c21e632 3959 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
e5593f56
MK		 3960 return;
3961
42935eca 3962 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 3963}
3964
3965static void ieee80211_sta_monitor_work(struct work_struct *work)
3966{
3967 struct ieee80211_sub_if_data *sdata =
3968 container_of(work, struct ieee80211_sub_if_data,
3969 u.mgd.monitor_work);
3970
3971 ieee80211_mgd_probe_ap(sdata, false);
3972}
3973
9c6bd790
JB		 3974static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3975{
ad935687 3976 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
925e64c3 3977 __ieee80211_stop_poll(sdata);
ad935687 3978
b291ba11 3979 /* let's probe the connection once */
30686bf7 3980 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
494f1fe5
EP		 3981 ieee80211_queue_work(&sdata->local->hw,
3982 &sdata->u.mgd.monitor_work);
b291ba11 3983 /* and do all the other regular work too */
64592c8f 3984 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 3985 }
9c6bd790 3986}
f0706e82 3987
b8360ab8 3988#ifdef CONFIG_PM
1a1cb744
JB		 3989void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
3990{
3991 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3992 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3993
3994 sdata_lock(sdata);
3995
c52666ae
EG		 3996 if (ifmgd->auth_data || ifmgd->assoc_data) {
3997 const u8 *bssid = ifmgd->auth_data ?
3998 ifmgd->auth_data->bss->bssid :
3999 ifmgd->assoc_data->bss->bssid;
4000
1a1cb744 4001 /*
c52666ae
EG		 4002 * If we are trying to authenticate / associate while suspending,
4003 * cfg80211 won't know and won't actually abort those attempts,
4004 * thus we need to do that ourselves.
1a1cb744 4005 */
c52666ae 4006 ieee80211_send_deauth_disassoc(sdata, bssid,
1a1cb744
JB		 4007 IEEE80211_STYPE_DEAUTH,
4008 WLAN_REASON_DEAUTH_LEAVING,
4009 false, frame_buf);
c52666ae
EG		 4010 if (ifmgd->assoc_data)
4011 ieee80211_destroy_assoc_data(sdata, false);
4012 if (ifmgd->auth_data)
4013 ieee80211_destroy_auth_data(sdata, false);
1a1cb744
JB		 4014 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4015 IEEE80211_DEAUTH_FRAME_LEN);
4016 }
4017
be72afe0
JB		 4018 /* This is a bit of a hack - we should find a better and more generic
4019 * solution to this. Normally when suspending, cfg80211 will in fact
4020 * deauthenticate. However, it doesn't (and cannot) stop an ongoing
4021 * auth (not so important) or assoc (this is the problem) process.
4022 *
4023 * As a consequence, it can happen that we are in the process of both
4024 * associating and suspending, and receive an association response
4025 * after cfg80211 has checked if it needs to disconnect, but before
4026 * we actually set the flag to drop incoming frames. This will then
4027 * cause the workqueue flush to process the association response in
4028 * the suspend, resulting in a successful association just before it
4029 * tries to remove the interface from the driver, which now though
4030 * has a channel context assigned ... this results in issues.
4031 *
4032 * To work around this (for now) simply deauth here again if we're
4033 * now connected.
4034 */
4035 if (ifmgd->associated && !sdata->local->wowlan) {
4036 u8 bssid[ETH_ALEN];
4037 struct cfg80211_deauth_request req = {
4038 .reason_code = WLAN_REASON_DEAUTH_LEAVING,
4039 .bssid = bssid,
4040 };
4041
4042 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4043 ieee80211_mgd_deauth(sdata, &req);
4044 }
4045
1a1cb744
JB		 4046 sdata_unlock(sdata);
4047}
4048
b8360ab8
JB		 4049void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
4050{
4051 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4052
8d61ffa5 4053 sdata_lock(sdata);
b8360ab8 4054 if (!ifmgd->associated) {
8d61ffa5 4055 sdata_unlock(sdata);
b8360ab8
JB		 4056 return;
4057 }
4058
4059 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
4060 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
4061 mlme_dbg(sdata, "driver requested disconnect after resume\n");
4062 ieee80211_sta_connection_lost(sdata,
4063 ifmgd->associated->bssid,
4064 WLAN_REASON_UNSPECIFIED,
4065 true);
8d61ffa5 4066 sdata_unlock(sdata);
b8360ab8
JB		 4067 return;
4068 }
8d61ffa5 4069 sdata_unlock(sdata);
b8360ab8
JB		 4070}
4071#endif
4072
9c6bd790
JB		 4073/* interface setup */
4074void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 4075{
46900298 4076 struct ieee80211_if_managed *ifmgd;
988c0f72 4077
46900298 4078 ifmgd = &sdata->u.mgd;
b291ba11 4079 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 4080 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 4081 INIT_WORK(&ifmgd->beacon_connection_loss_work,
4082 ieee80211_beacon_connection_loss_work);
882a7c69
JB		 4083 INIT_WORK(&ifmgd->csa_connection_drop_work,
4084 ieee80211_csa_connection_drop_work);
687da132 4085 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
81dd2b88
AN		 4086 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
4087 ieee80211_tdls_peer_del_work);
46900298 4088 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 4089 (unsigned long) sdata);
b291ba11
JB		 4090 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
4091 (unsigned long) sdata);
4092 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
4093 (unsigned long) sdata);
46900298 4094 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 4095 (unsigned long) sdata);
02219b3a
JB		 4096 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
4097 ieee80211_sta_handle_tspec_ac_params_wk);
9c6bd790 4098
ab1faead 4099 ifmgd->flags = 0;
1478acb3 4100 ifmgd->powersave = sdata->wdev.ps;
219c3867
AB		 4101 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
4102 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
67baf663 4103 ifmgd->p2p_noa_index = -1;
bbbdff9e 4104
0d8614b4 4105 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
0f78231b
JB		 4106 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
4107 else
4108 ifmgd->req_smps = IEEE80211_SMPS_OFF;
1277b4a9
LK		 4109
4110 /* Setup TDLS data */
4111 spin_lock_init(&ifmgd->teardown_lock);
4112 ifmgd->teardown_skb = NULL;
4113 ifmgd->orig_teardown_skb = NULL;
f0706e82
JB		 4114}
4115
77fdaa12
JB		 4116/* scan finished notification */
4117void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 4118{
31ee67a1 4119 struct ieee80211_sub_if_data *sdata;
60f8b39c 4120
77fdaa12
JB		 4121 /* Restart STA timers */
4122 rcu_read_lock();
370bd005
BG		 4123 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4124 if (ieee80211_sdata_running(sdata))
4125 ieee80211_restart_sta_timer(sdata);
4126 }
77fdaa12
JB		 4127 rcu_read_unlock();
4128}
60f8b39c 4129
f2d9d270
JB		 4130static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
4131 struct cfg80211_bss *cbss)
4132{
4133 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4134 const u8 *ht_cap_ie, *vht_cap_ie;
4135 const struct ieee80211_ht_cap *ht_cap;
4136 const struct ieee80211_vht_cap *vht_cap;
4137 u8 chains = 1;
4138
4139 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
4140 return chains;
4141
9caf0364 4142 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
f2d9d270
JB		 4143 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
4144 ht_cap = (void *)(ht_cap_ie + 2);
4145 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4146 /*
4147 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4148 * "Tx Unequal Modulation Supported" fields.
4149 */
4150 }
4151
4152 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
4153 return chains;
4154
9caf0364 4155 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
f2d9d270
JB		 4156 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
4157 u8 nss;
4158 u16 tx_mcs_map;
4159
4160 vht_cap = (void *)(vht_cap_ie + 2);
4161 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4162 for (nss = 8; nss > 0; nss--) {
4163 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4164 IEEE80211_VHT_MCS_NOT_SUPPORTED)
4165 break;
4166 }
4167 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4168 chains = max(chains, nss);
4169 }
4170
4171 return chains;
4172}
4173
b17166a7
JB		 4174static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4175 struct cfg80211_bss *cbss)
a1cf775d
JB		 4176{
4177 struct ieee80211_local *local = sdata->local;
4178 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
53b954ee 4179 const struct ieee80211_ht_cap *ht_cap = NULL;
24398e39 4180 const struct ieee80211_ht_operation *ht_oper = NULL;
f2d9d270 4181 const struct ieee80211_vht_operation *vht_oper = NULL;
24398e39 4182 struct ieee80211_supported_band *sband;
4bf88530 4183 struct cfg80211_chan_def chandef;
f2d9d270 4184 int ret;
52a45f38
AN		 4185 u32 i;
4186 bool have_80mhz;
a1cf775d 4187
24398e39
JB		 4188 sband = local->hw.wiphy->bands[cbss->channel->band];
4189
f2d9d270
JB		 4190 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
4191 IEEE80211_STA_DISABLE_80P80MHZ |
4192 IEEE80211_STA_DISABLE_160MHZ);
4193
9caf0364
JB		 4194 rcu_read_lock();
4195
f2d9d270
JB		 4196 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
4197 sband->ht_cap.ht_supported) {
53b954ee 4198 const u8 *ht_oper_ie, *ht_cap_ie;
24398e39 4199
9caf0364 4200 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
24398e39
JB		 4201 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
4202 ht_oper = (void *)(ht_oper_ie + 2);
08e6effa 4203
53b954ee
EP		 4204 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4205 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
4206 ht_cap = (void *)(ht_cap_ie + 2);
4207
4208 if (!ht_cap) {
08e6effa
JB		 4209 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4210 ht_oper = NULL;
4211 }
24398e39
JB		 4212 }
4213
f2d9d270
JB		 4214 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4215 sband->vht_cap.vht_supported) {
08e6effa 4216 const u8 *vht_oper_ie, *vht_cap;
f2d9d270 4217
9caf0364
JB		 4218 vht_oper_ie = ieee80211_bss_get_ie(cbss,
4219 WLAN_EID_VHT_OPERATION);
f2d9d270
JB		 4220 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
4221 vht_oper = (void *)(vht_oper_ie + 2);
4222 if (vht_oper && !ht_oper) {
4223 vht_oper = NULL;
bdcbd8e0 4224 sdata_info(sdata,
f2d9d270 4225 "AP advertised VHT without HT, disabling both\n");
cb145022
JB		 4226 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4227 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
24398e39 4228 }
08e6effa
JB		 4229
4230 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4231 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
4232 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4233 vht_oper = NULL;
4234 }
24398e39
JB		 4235 }
4236
52a45f38
AN		 4237 /* Allow VHT if at least one channel on the sband supports 80 MHz */
4238 have_80mhz = false;
4239 for (i = 0; i < sband->n_channels; i++) {
4240 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
4241 IEEE80211_CHAN_NO_80MHZ))
4242 continue;
4243
4244 have_80mhz = true;
4245 break;
4246 }
4247
4248 if (!have_80mhz)
4249 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4250
f2d9d270
JB		 4251 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
4252 cbss->channel,
53b954ee 4253 ht_cap, ht_oper, vht_oper,
5cdaed1e 4254 &chandef, false);
04ecd257 4255
f2d9d270
JB		 4256 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
4257 local->rx_chains);
24398e39 4258
9caf0364
JB		 4259 rcu_read_unlock();
4260
04ecd257
JB		 4261 /* will change later if needed */
4262 sdata->smps_mode = IEEE80211_SMPS_OFF;
4263
34a3740d 4264 mutex_lock(&local->mtx);
f2d9d270
JB		 4265 /*
4266 * If this fails (possibly due to channel context sharing
4267 * on incompatible channels, e.g. 80+80 and 160 sharing the
4268 * same control channel) try to use a smaller bandwidth.
4269 */
4270 ret = ieee80211_vif_use_channel(sdata, &chandef,
4271 IEEE80211_CHANCTX_SHARED);
0418a445
SW		 4272
4273 /* don't downgrade for 5 and 10 MHz channels, though. */
4274 if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4275 chandef.width == NL80211_CHAN_WIDTH_10)
34a3740d 4276 goto out;
0418a445 4277
d601cd8d 4278 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
e6b7cde4 4279 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
d601cd8d
JB		 4280 ret = ieee80211_vif_use_channel(sdata, &chandef,
4281 IEEE80211_CHANCTX_SHARED);
4282 }
34a3740d
JB		 4283 out:
4284 mutex_unlock(&local->mtx);
f2d9d270 4285 return ret;
b17166a7
JB		 4286}
4287
4288static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
c1041f10
CRI		 4289 struct cfg80211_bss *cbss, bool assoc,
4290 bool override)
b17166a7
JB		 4291{
4292 struct ieee80211_local *local = sdata->local;
4293 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4294 struct ieee80211_bss *bss = (void *)cbss->priv;
4295 struct sta_info *new_sta = NULL;
179b8fc7 4296 struct ieee80211_supported_band *sband;
c1041f10 4297 bool have_sta = false;
b17166a7
JB		 4298 int err;
4299
179b8fc7
CRI		 4300 sband = local->hw.wiphy->bands[cbss->channel->band];
4301
b17166a7
JB		 4302 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
4303 return -EINVAL;
4304
4305 if (assoc) {
4306 rcu_read_lock();
4307 have_sta = sta_info_get(sdata, cbss->bssid);
4308 rcu_read_unlock();
4309 }
4310
4311 if (!have_sta) {
4312 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4313 if (!new_sta)
4314 return -ENOMEM;
4315 }
179b8fc7 4316
c1041f10 4317 if (new_sta || override) {
179b8fc7
CRI		 4318 err = ieee80211_prep_channel(sdata, cbss);
4319 if (err) {
4320 if (new_sta)
4321 sta_info_free(local, new_sta);
4322 return -EINVAL;
4323 }
4324 }
4325
13e0c8e3 4326 if (new_sta) {
5d6a1b06
JB		 4327 u32 rates = 0, basic_rates = 0;
4328 bool have_higher_than_11mbit;
4329 int min_rate = INT_MAX, min_rate_index = -1;
2103dec1 4330 struct ieee80211_chanctx_conf *chanctx_conf;
8cef2c9d 4331 const struct cfg80211_bss_ies *ies;
179b8fc7 4332 int shift = ieee80211_vif_get_shift(&sdata->vif);
2103dec1 4333 u32 rate_flags;
b17166a7 4334
2103dec1
SW		 4335 rcu_read_lock();
4336 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4337 if (WARN_ON(!chanctx_conf)) {
4338 rcu_read_unlock();
c368ddaa 4339 sta_info_free(local, new_sta);
2103dec1
SW		 4340 return -EINVAL;
4341 }
4342 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
4343 rcu_read_unlock();
5d6a1b06 4344
5d6a1b06
JB		 4345 ieee80211_get_rates(sband, bss->supp_rates,
4346 bss->supp_rates_len,
4347 &rates, &basic_rates,
4348 &have_higher_than_11mbit,
2103dec1
SW		 4349 &min_rate, &min_rate_index,
4350 shift, rate_flags);
5d6a1b06
JB		 4351
4352 /*
4353 * This used to be a workaround for basic rates missing
4354 * in the association response frame. Now that we no
4355 * longer use the basic rates from there, it probably
4356 * doesn't happen any more, but keep the workaround so
4357 * in case some *other* APs are buggy in different ways
4358 * we can connect -- with a warning.
4359 */
4360 if (!basic_rates && min_rate_index >= 0) {
bdcbd8e0
JB		 4361 sdata_info(sdata,
4362 "No basic rates, using min rate instead\n");
5d6a1b06
JB		 4363 basic_rates = BIT(min_rate_index);
4364 }
4365
13e0c8e3 4366 new_sta->sta.supp_rates[cbss->channel->band] = rates;
5d6a1b06
JB		 4367 sdata->vif.bss_conf.basic_rates = basic_rates;
4368
4369 /* cf. IEEE 802.11 9.2.12 */
55de908a 4370 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
5d6a1b06
JB		 4371 have_higher_than_11mbit)
4372 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
4373 else
4374 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
4375
4376 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
4377
8c358bcd
JB		 4378 /* set timing information */
4379 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
8cef2c9d 4380 rcu_read_lock();
ef429dad
JB		 4381 ies = rcu_dereference(cbss->beacon_ies);
4382 if (ies) {
4383 const u8 *tim_ie;
4384
4385 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4386 sdata->vif.bss_conf.sync_device_ts =
4387 bss->device_ts_beacon;
4388 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4389 ies->data, ies->len);
4390 if (tim_ie && tim_ie[1] >= 2)
4391 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
4392 else
4393 sdata->vif.bss_conf.sync_dtim_count = 0;
30686bf7
JB		 4394 } else if (!ieee80211_hw_check(&sdata->local->hw,
4395 TIMING_BEACON_ONLY)) {
ef429dad
JB		 4396 ies = rcu_dereference(cbss->proberesp_ies);
4397 /* must be non-NULL since beacon IEs were NULL */
4398 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4399 sdata->vif.bss_conf.sync_device_ts =
4400 bss->device_ts_presp;
4401 sdata->vif.bss_conf.sync_dtim_count = 0;
4402 } else {
4403 sdata->vif.bss_conf.sync_tsf = 0;
4404 sdata->vif.bss_conf.sync_device_ts = 0;
4405 sdata->vif.bss_conf.sync_dtim_count = 0;
4406 }
8cef2c9d 4407 rcu_read_unlock();
8c358bcd
JB		 4408
4409 /* tell driver about BSSID, basic rates and timing */
5d6a1b06 4410 ieee80211_bss_info_change_notify(sdata,
8c358bcd
JB		 4411 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4412 BSS_CHANGED_BEACON_INT);
a1cf775d
JB		 4413
4414 if (assoc)
13e0c8e3 4415 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
a1cf775d 4416
13e0c8e3
JB		 4417 err = sta_info_insert(new_sta);
4418 new_sta = NULL;
a1cf775d 4419 if (err) {
bdcbd8e0
JB		 4420 sdata_info(sdata,
4421 "failed to insert STA entry for the AP (error %d)\n",
4422 err);
a1cf775d
JB		 4423 return err;
4424 }
4425 } else
b203ca39 4426 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
a1cf775d 4427
7d830a19
DS		 4428 /* Cancel scan to ensure that nothing interferes with connection */
4429 if (local->scanning)
4430 ieee80211_scan_cancel(local);
4431
a1cf775d
JB		 4432 return 0;
4433}
4434
77fdaa12
JB		 4435/* config hooks */
4436int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4437 struct cfg80211_auth_request *req)
9c6bd790 4438{
66e67e41
JB		 4439 struct ieee80211_local *local = sdata->local;
4440 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4441 struct ieee80211_mgd_auth_data *auth_data;
77fdaa12 4442 u16 auth_alg;
66e67e41
JB		 4443 int err;
4444
4445 /* prepare auth data structure */
9c6bd790 4446
77fdaa12
JB		 4447 switch (req->auth_type) {
4448 case NL80211_AUTHTYPE_OPEN_SYSTEM:
4449 auth_alg = WLAN_AUTH_OPEN;
4450 break;
4451 case NL80211_AUTHTYPE_SHARED_KEY:
66e67e41 4452 if (IS_ERR(local->wep_tx_tfm))
9dca9c49 4453 return -EOPNOTSUPP;
77fdaa12
JB		 4454 auth_alg = WLAN_AUTH_SHARED_KEY;
4455 break;
4456 case NL80211_AUTHTYPE_FT:
4457 auth_alg = WLAN_AUTH_FT;
4458 break;
4459 case NL80211_AUTHTYPE_NETWORK_EAP:
4460 auth_alg = WLAN_AUTH_LEAP;
4461 break;
6b8ece3a
JM		 4462 case NL80211_AUTHTYPE_SAE:
4463 auth_alg = WLAN_AUTH_SAE;
4464 break;
77fdaa12
JB		 4465 default:
4466 return -EOPNOTSUPP;
60f8b39c 4467 }
77fdaa12 4468
6b8ece3a
JM		 4469 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
4470 req->ie_len, GFP_KERNEL);
66e67e41 4471 if (!auth_data)
9c6bd790 4472 return -ENOMEM;
77fdaa12 4473
66e67e41 4474 auth_data->bss = req->bss;
77fdaa12 4475
6b8ece3a
JM		 4476 if (req->sae_data_len >= 4) {
4477 __le16 *pos = (__le16 *) req->sae_data;
4478 auth_data->sae_trans = le16_to_cpu(pos[0]);
4479 auth_data->sae_status = le16_to_cpu(pos[1]);
4480 memcpy(auth_data->data, req->sae_data + 4,
4481 req->sae_data_len - 4);
4482 auth_data->data_len += req->sae_data_len - 4;
4483 }
4484
77fdaa12 4485 if (req->ie && req->ie_len) {
6b8ece3a
JM		 4486 memcpy(&auth_data->data[auth_data->data_len],
4487 req->ie, req->ie_len);
4488 auth_data->data_len += req->ie_len;
9c6bd790 4489 }
77fdaa12 4490
fffd0934 4491 if (req->key && req->key_len) {
66e67e41
JB		 4492 auth_data->key_len = req->key_len;
4493 auth_data->key_idx = req->key_idx;
4494 memcpy(auth_data->key, req->key, req->key_len);
fffd0934
JB		 4495 }
4496
66e67e41 4497 auth_data->algorithm = auth_alg;
60f8b39c 4498
66e67e41 4499 /* try to authenticate/probe */
2a33bee2 4500
66e67e41
JB		 4501 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4502 ifmgd->assoc_data) {
4503 err = -EBUSY;
4504 goto err_free;
2a33bee2
GE		 4505 }
4506
66e67e41
JB		 4507 if (ifmgd->auth_data)
4508 ieee80211_destroy_auth_data(sdata, false);
2a33bee2 4509
66e67e41
JB		 4510 /* prep auth_data so we don't go into idle on disassoc */
4511 ifmgd->auth_data = auth_data;
af6b6374 4512
7b119dc0
JB		 4513 if (ifmgd->associated) {
4514 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4515
4516 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4517 WLAN_REASON_UNSPECIFIED,
4518 false, frame_buf);
4519
a90faa9d
EG		 4520 ieee80211_report_disconnect(sdata, frame_buf,
4521 sizeof(frame_buf), true,
4522 WLAN_REASON_UNSPECIFIED);
7b119dc0 4523 }
af6b6374 4524
bdcbd8e0 4525 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
e5b900d2 4526
c1041f10 4527 err = ieee80211_prep_connection(sdata, req->bss, false, false);
a1cf775d 4528 if (err)
66e67e41 4529 goto err_clear;
af6b6374 4530
46cad4b7 4531 err = ieee80211_auth(sdata);
66e67e41 4532 if (err) {
66e67e41
JB		 4533 sta_info_destroy_addr(sdata, req->bss->bssid);
4534 goto err_clear;
4535 }
4536
4537 /* hold our own reference */
5b112d3d 4538 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
8d61ffa5 4539 return 0;
66e67e41
JB		 4540
4541 err_clear:
c84a67a2 4542 eth_zero_addr(ifmgd->bssid);
3d2abdfd 4543 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41 4544 ifmgd->auth_data = NULL;
d01f858c
MK		 4545 mutex_lock(&sdata->local->mtx);
4546 ieee80211_vif_release_channel(sdata);
4547 mutex_unlock(&sdata->local->mtx);
66e67e41
JB		 4548 err_free:
4549 kfree(auth_data);
66e67e41 4550 return err;
af6b6374
JB		 4551}
4552
095d81ce
JB		 4553static bool ieee80211_usable_wmm_params(struct ieee80211_sub_if_data *sdata,
4554 const u8 *wmm_param, int len)
4555{
4556 const u8 *pos;
4557 size_t left;
4558
4559 if (len < 8)
4560 return false;
4561
4562 if (wmm_param[5] != 1 /* version */)
4563 return false;
4564
4565 pos = wmm_param + 8;
4566 left = len - 8;
4567
4568 for (; left >= 4; left -= 4, pos += 4) {
095d81ce
JB		 4569 u8 ecwmin = pos[1] & 0x0f;
4570 u8 ecwmax = (pos[1] & 0xf0) >> 4;
4571 int aci = (pos[0] >> 5) & 0x03;
4572
095d81ce
JB		 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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