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mac80211: Requeue work after scan complete for all VIF types.
[linux.git] / net / mac80211 / mlme.c
CommitLineData
f0706e82
JB		 1/*
2 * BSS client mode implementation
5394af4d 3 * Copyright 2003-2008, Jouni Malinen <[email protected]>
f0706e82
JB		 4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <[email protected]>
7 * Copyright 2007, Michael Wu <[email protected]>
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)) {
a87da0cb
JB		 1382 new_ap_level = pwr_level_80211h;
1383
1384 if (sdata->ap_power_level == new_ap_level)
1385 return 0;
1386
cef2fc1c
JL		 1387 sdata_dbg(sdata,
1388 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1389 pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
1390 sdata->u.mgd.bssid);
c8d65917 1391 } else { /* has_cisco_pwr is always true here. */
a87da0cb
JB		 1392 new_ap_level = pwr_level_cisco;
1393
1394 if (sdata->ap_power_level == new_ap_level)
1395 return 0;
1396
cef2fc1c
JL		 1397 sdata_dbg(sdata,
1398 "Limiting TX power to %d dBm as advertised by %pM\n",
1399 pwr_level_cisco, sdata->u.mgd.bssid);
c8d65917 1400 }
04b7b2ff 1401
1ea6f9c0
JB		 1402 sdata->ap_power_level = new_ap_level;
1403 if (__ieee80211_recalc_txpower(sdata))
1404 return BSS_CHANGED_TXPOWER;
1405 return 0;
cc32abd4
JB		 1406}
1407
965bedad
JB		 1408/* powersave */
1409static void ieee80211_enable_ps(struct ieee80211_local *local,
1410 struct ieee80211_sub_if_data *sdata)
1411{
1412 struct ieee80211_conf *conf = &local->hw.conf;
1413
d5edaedc
JB		 1414 /*
1415 * If we are scanning right now then the parameters will
1416 * take effect when scan finishes.
1417 */
fbe9c429 1418 if (local->scanning)
d5edaedc
JB		 1419 return;
1420
965bedad 1421 if (conf->dynamic_ps_timeout > 0 &&
30686bf7 1422 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) {
965bedad
JB		 1423 mod_timer(&local->dynamic_ps_timer, jiffies +
1424 msecs_to_jiffies(conf->dynamic_ps_timeout));
1425 } else {
30686bf7 1426 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK))
076cdcb1 1427 ieee80211_send_nullfunc(local, sdata, true);
375177bf 1428
30686bf7
JB		 1429 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1430 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
2a13052f
JO		 1431 return;
1432
1433 conf->flags |= IEEE80211_CONF_PS;
1434 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965bedad
JB		 1435 }
1436}
1437
1438static void ieee80211_change_ps(struct ieee80211_local *local)
1439{
1440 struct ieee80211_conf *conf = &local->hw.conf;
1441
1442 if (local->ps_sdata) {
965bedad
JB		 1443 ieee80211_enable_ps(local, local->ps_sdata);
1444 } else if (conf->flags & IEEE80211_CONF_PS) {
1445 conf->flags &= ~IEEE80211_CONF_PS;
1446 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1447 del_timer_sync(&local->dynamic_ps_timer);
1448 cancel_work_sync(&local->dynamic_ps_enable_work);
1449 }
1450}
1451
808118cb
JY		 1452static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1453{
1454 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1455 struct sta_info *sta = NULL;
c2c98fde 1456 bool authorized = false;
808118cb
JY		 1457
1458 if (!mgd->powersave)
1459 return false;
1460
05cb9108
JB		 1461 if (mgd->broken_ap)
1462 return false;
1463
808118cb
JY		 1464 if (!mgd->associated)
1465 return false;
1466
392b9ffb 1467 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
808118cb
JY		 1468 return false;
1469
989c6505 1470 if (!mgd->have_beacon)
ce857888
AB		 1471 return false;
1472
808118cb
JY		 1473 rcu_read_lock();
1474 sta = sta_info_get(sdata, mgd->bssid);
1475 if (sta)
c2c98fde 1476 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
808118cb
JY		 1477 rcu_read_unlock();
1478
c2c98fde 1479 return authorized;
808118cb
JY		 1480}
1481
965bedad 1482/* need to hold RTNL or interface lock */
4a733ef1 1483void ieee80211_recalc_ps(struct ieee80211_local *local)
965bedad
JB		 1484{
1485 struct ieee80211_sub_if_data *sdata, *found = NULL;
1486 int count = 0;
195e294d 1487 int timeout;
965bedad 1488
30686bf7 1489 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) {
965bedad
JB		 1490 local->ps_sdata = NULL;
1491 return;
1492 }
1493
1494 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 1495 if (!ieee80211_sdata_running(sdata))
965bedad 1496 continue;
8c7914de
RM		 1497 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1498 /* If an AP vif is found, then disable PS
1499 * by setting the count to zero thereby setting
1500 * ps_sdata to NULL.
1501 */
1502 count = 0;
1503 break;
1504 }
965bedad
JB		 1505 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1506 continue;
1507 found = sdata;
1508 count++;
1509 }
1510
808118cb 1511 if (count == 1 && ieee80211_powersave_allowed(found)) {
4a733ef1 1512 u8 dtimper = found->u.mgd.dtim_period;
10f644a4
JB		 1513 s32 beaconint_us;
1514
10f644a4
JB		 1515 beaconint_us = ieee80211_tu_to_usec(
1516 found->vif.bss_conf.beacon_int);
1517
ff616381 1518 timeout = local->dynamic_ps_forced_timeout;
4a733ef1
JB		 1519 if (timeout < 0)
1520 timeout = 100;
09b85568 1521 local->hw.conf.dynamic_ps_timeout = timeout;
195e294d 1522
4a733ef1
JB		 1523 /* If the TIM IE is invalid, pretend the value is 1 */
1524 if (!dtimper)
1525 dtimper = 1;
1526
1527 local->hw.conf.ps_dtim_period = dtimper;
1528 local->ps_sdata = found;
10f644a4 1529 } else {
965bedad 1530 local->ps_sdata = NULL;
10f644a4 1531 }
965bedad
JB		 1532
1533 ieee80211_change_ps(local);
1534}
1535
ab095877
EP		 1536void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1537{
1538 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1539
1540 if (sdata->vif.bss_conf.ps != ps_allowed) {
1541 sdata->vif.bss_conf.ps = ps_allowed;
1542 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1543 }
1544}
1545
965bedad
JB		 1546void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1547{
1548 struct ieee80211_local *local =
1549 container_of(work, struct ieee80211_local,
1550 dynamic_ps_disable_work);
1551
1552 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1553 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1554 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1555 }
1556
1557 ieee80211_wake_queues_by_reason(&local->hw,
445ea4e8 1558 IEEE80211_MAX_QUEUE_MAP,
cca07b00
LC		 1559 IEEE80211_QUEUE_STOP_REASON_PS,
1560 false);
965bedad
JB		 1561}
1562
1563void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1564{
1565 struct ieee80211_local *local =
1566 container_of(work, struct ieee80211_local,
1567 dynamic_ps_enable_work);
1568 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
5e34069c 1569 struct ieee80211_if_managed *ifmgd;
1ddc2867
RM		 1570 unsigned long flags;
1571 int q;
965bedad
JB		 1572
1573 /* can only happen when PS was just disabled anyway */
1574 if (!sdata)
1575 return;
1576
5e34069c
CL		 1577 ifmgd = &sdata->u.mgd;
1578
965bedad
JB		 1579 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1580 return;
1581
09b85568 1582 if (local->hw.conf.dynamic_ps_timeout > 0) {
77b7023a
AN		 1583 /* don't enter PS if TX frames are pending */
1584 if (drv_tx_frames_pending(local)) {
1ddc2867
RM		 1585 mod_timer(&local->dynamic_ps_timer, jiffies +
1586 msecs_to_jiffies(
1587 local->hw.conf.dynamic_ps_timeout));
1588 return;
1589 }
77b7023a
AN		 1590
1591 /*
1592 * transmission can be stopped by others which leads to
1593 * dynamic_ps_timer expiry. Postpone the ps timer if it
1594 * is not the actual idle state.
1595 */
1596 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1597 for (q = 0; q < local->hw.queues; q++) {
1598 if (local->queue_stop_reasons[q]) {
1599 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1600 flags);
1601 mod_timer(&local->dynamic_ps_timer, jiffies +
1602 msecs_to_jiffies(
1603 local->hw.conf.dynamic_ps_timeout));
1604 return;
1605 }
1606 }
1607 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1ddc2867 1608 }
1ddc2867 1609
30686bf7 1610 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
9c38a8b4 1611 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
a1598383 1612 if (drv_tx_frames_pending(local)) {
e8306f98
VN		 1613 mod_timer(&local->dynamic_ps_timer, jiffies +
1614 msecs_to_jiffies(
1615 local->hw.conf.dynamic_ps_timeout));
a1598383 1616 } else {
076cdcb1 1617 ieee80211_send_nullfunc(local, sdata, true);
e8306f98 1618 /* Flush to get the tx status of nullfunc frame */
3b24f4c6 1619 ieee80211_flush_queues(local, sdata, false);
e8306f98 1620 }
f3e85b9e
VN		 1621 }
1622
30686bf7
JB		 1623 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
1624 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) ||
375177bf
VN		 1625 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1626 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1627 local->hw.conf.flags |= IEEE80211_CONF_PS;
1628 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1629 }
965bedad
JB		 1630}
1631
1632void ieee80211_dynamic_ps_timer(unsigned long data)
1633{
1634 struct ieee80211_local *local = (void *) data;
1635
42935eca 1636 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 1637}
1638
164eb02d
SW		 1639void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1640{
1641 struct delayed_work *delayed_work =
1642 container_of(work, struct delayed_work, work);
1643 struct ieee80211_sub_if_data *sdata =
1644 container_of(delayed_work, struct ieee80211_sub_if_data,
1645 dfs_cac_timer_work);
d2859df5 1646 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
164eb02d 1647
34a3740d
JB		 1648 mutex_lock(&sdata->local->mtx);
1649 if (sdata->wdev.cac_started) {
1650 ieee80211_vif_release_channel(sdata);
1651 cfg80211_cac_event(sdata->dev, &chandef,
1652 NL80211_RADAR_CAC_FINISHED,
1653 GFP_KERNEL);
1654 }
1655 mutex_unlock(&sdata->local->mtx);
164eb02d
SW		 1656}
1657
02219b3a
JB		 1658static bool
1659__ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1660{
1661 struct ieee80211_local *local = sdata->local;
1662 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
cc72f6e2 1663 bool ret = false;
02219b3a
JB		 1664 int ac;
1665
1666 if (local->hw.queues < IEEE80211_NUM_ACS)
1667 return false;
1668
1669 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1670 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
1671 int non_acm_ac;
1672 unsigned long now = jiffies;
1673
1674 if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
1675 tx_tspec->admitted_time &&
1676 time_after(now, tx_tspec->time_slice_start + HZ)) {
1677 tx_tspec->consumed_tx_time = 0;
1678 tx_tspec->time_slice_start = now;
1679
1680 if (tx_tspec->downgraded)
1681 tx_tspec->action =
1682 TX_TSPEC_ACTION_STOP_DOWNGRADE;
1683 }
1684
1685 switch (tx_tspec->action) {
1686 case TX_TSPEC_ACTION_STOP_DOWNGRADE:
1687 /* take the original parameters */
1688 if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac]))
1689 sdata_err(sdata,
1690 "failed to set TX queue parameters for queue %d\n",
1691 ac);
1692 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1693 tx_tspec->downgraded = false;
1694 ret = true;
1695 break;
1696 case TX_TSPEC_ACTION_DOWNGRADE:
1697 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
1698 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1699 ret = true;
1700 break;
1701 }
1702 /* downgrade next lower non-ACM AC */
1703 for (non_acm_ac = ac + 1;
1704 non_acm_ac < IEEE80211_NUM_ACS;
1705 non_acm_ac++)
1706 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
1707 break;
1708 /* The loop will result in using BK even if it requires
1709 * admission control, such configuration makes no sense
1710 * and we have to transmit somehow - the AC selection
1711 * does the same thing.
1712 */
1713 if (drv_conf_tx(local, sdata, ac,
1714 &sdata->tx_conf[non_acm_ac]))
1715 sdata_err(sdata,
1716 "failed to set TX queue parameters for queue %d\n",
1717 ac);
1718 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1719 ret = true;
1720 schedule_delayed_work(&ifmgd->tx_tspec_wk,
1721 tx_tspec->time_slice_start + HZ - now + 1);
1722 break;
1723 case TX_TSPEC_ACTION_NONE:
1724 /* nothing now */
1725 break;
1726 }
1727 }
1728
1729 return ret;
1730}
1731
1732void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1733{
1734 if (__ieee80211_sta_handle_tspec_ac_params(sdata))
1735 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1736}
1737
1738static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
1739{
1740 struct ieee80211_sub_if_data *sdata;
1741
1742 sdata = container_of(work, struct ieee80211_sub_if_data,
1743 u.mgd.tx_tspec_wk.work);
1744 ieee80211_sta_handle_tspec_ac_params(sdata);
1745}
1746
60f8b39c 1747/* MLME */
7d25745d 1748static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
4ced3f74 1749 struct ieee80211_sub_if_data *sdata,
4a3cb702 1750 const u8 *wmm_param, size_t wmm_param_len)
f0706e82 1751{
2ed77ea6 1752 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS];
4ced3f74 1753 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 1754 size_t left;
2ed77ea6 1755 int count, ac;
4a3cb702
JB		 1756 const u8 *pos;
1757 u8 uapsd_queues = 0;
f0706e82 1758
e1b3ec1a 1759 if (!local->ops->conf_tx)
7d25745d 1760 return false;
e1b3ec1a 1761
32c5057b 1762 if (local->hw.queues < IEEE80211_NUM_ACS)
7d25745d 1763 return false;
3434fbd3
JB		 1764
1765 if (!wmm_param)
7d25745d 1766 return false;
3434fbd3 1767
f0706e82 1768 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
7d25745d 1769 return false;
ab13315a
KV		 1770
1771 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
dc41e4d4 1772 uapsd_queues = ifmgd->uapsd_queues;
ab13315a 1773
f0706e82 1774 count = wmm_param[6] & 0x0f;
46900298 1775 if (count == ifmgd->wmm_last_param_set)
7d25745d 1776 return false;
46900298 1777 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 1778
1779 pos = wmm_param + 8;
1780 left = wmm_param_len - 8;
1781
1782 memset(&params, 0, sizeof(params));
1783
00e96dec 1784 sdata->wmm_acm = 0;
f0706e82
JB		 1785 for (; left >= 4; left -= 4, pos += 4) {
1786 int aci = (pos[0] >> 5) & 0x03;
1787 int acm = (pos[0] >> 4) & 0x01;
ab13315a 1788 bool uapsd = false;
f0706e82
JB		 1789
1790 switch (aci) {
0eeb59fe 1791 case 1: /* AC_BK */
2ed77ea6 1792 ac = IEEE80211_AC_BK;
988c0f72 1793 if (acm)
00e96dec 1794 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV		 1795 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1796 uapsd = true;
f0706e82 1797 break;
0eeb59fe 1798 case 2: /* AC_VI */
2ed77ea6 1799 ac = IEEE80211_AC_VI;
988c0f72 1800 if (acm)
00e96dec 1801 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV		 1802 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1803 uapsd = true;
f0706e82 1804 break;
0eeb59fe 1805 case 3: /* AC_VO */
2ed77ea6 1806 ac = IEEE80211_AC_VO;
988c0f72 1807 if (acm)
00e96dec 1808 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV		 1809 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1810 uapsd = true;
f0706e82 1811 break;
0eeb59fe 1812 case 0: /* AC_BE */
f0706e82 1813 default:
2ed77ea6 1814 ac = IEEE80211_AC_BE;
988c0f72 1815 if (acm)
00e96dec 1816 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV		 1817 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1818 uapsd = true;
f0706e82
JB		 1819 break;
1820 }
1821
2ed77ea6 1822 params[ac].aifs = pos[0] & 0x0f;
730a7550 1823
2ed77ea6 1824 if (params[ac].aifs < 2) {
730a7550
EG		 1825 sdata_info(sdata,
1826 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n",
2ed77ea6
JB		 1827 params[ac].aifs, aci);
1828 params[ac].aifs = 2;
730a7550 1829 }
2ed77ea6
JB		 1830 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1831 params[ac].cw_min = ecw2cw(pos[1] & 0x0f);
1832 params[ac].txop = get_unaligned_le16(pos + 2);
1833 params[ac].acm = acm;
1834 params[ac].uapsd = uapsd;
ab13315a 1835
2ed77ea6
JB		 1836 if (params[ac].cw_min > params[ac].cw_max) {
1837 sdata_info(sdata,
1838 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n",
1839 params[ac].cw_min, params[ac].cw_max, aci);
1840 return false;
1841 }
1842 }
1843
1844 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
bdcbd8e0 1845 mlme_dbg(sdata,
2ed77ea6
JB		 1846 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
1847 ac, params[ac].acm,
1848 params[ac].aifs, params[ac].cw_min, params[ac].cw_max,
1849 params[ac].txop, params[ac].uapsd,
1850 ifmgd->tx_tspec[ac].downgraded);
1851 sdata->tx_conf[ac] = params[ac];
1852 if (!ifmgd->tx_tspec[ac].downgraded &&
1853 drv_conf_tx(local, sdata, ac, &params[ac]))
bdcbd8e0 1854 sdata_err(sdata,
2ed77ea6
JB		 1855 "failed to set TX queue parameters for AC %d\n",
1856 ac);
f0706e82 1857 }
e1b3ec1a
SG		 1858
1859 /* enable WMM or activate new settings */
4ced3f74 1860 sdata->vif.bss_conf.qos = true;
7d25745d 1861 return true;
f0706e82
JB		 1862}
1863
925e64c3
SG		 1864static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1865{
1866 lockdep_assert_held(&sdata->local->mtx);
1867
392b9ffb 1868 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
925e64c3
SG		 1869 ieee80211_run_deferred_scan(sdata->local);
1870}
1871
1872static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1873{
1874 mutex_lock(&sdata->local->mtx);
1875 __ieee80211_stop_poll(sdata);
1876 mutex_unlock(&sdata->local->mtx);
1877}
1878
7a5158ef
JB		 1879static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1880 u16 capab, bool erp_valid, u8 erp)
5628221c 1881{
bda3933a 1882 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 1883 u32 changed = 0;
7a5158ef
JB		 1884 bool use_protection;
1885 bool use_short_preamble;
1886 bool use_short_slot;
1887
1888 if (erp_valid) {
1889 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1890 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1891 } else {
1892 use_protection = false;
1893 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1894 }
1895
1896 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
55de908a 1897 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
43d35343 1898 use_short_slot = true;
5628221c 1899
471b3efd 1900 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 1901 bss_conf->use_cts_prot = use_protection;
1902 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 1903 }
7e9ed188 1904
d43c7b37 1905 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 1906 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 1907 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 1908 }
d9430a32 1909
7a5158ef 1910 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 1911 bss_conf->use_short_slot = use_short_slot;
1912 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 1913 }
1914
1915 return changed;
1916}
1917
f698d856 1918static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 1919 struct cfg80211_bss *cbss,
ae5eb026 1920 u32 bss_info_changed)
f0706e82 1921{
0c1ad2ca 1922 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 1923 struct ieee80211_local *local = sdata->local;
68542962 1924 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
d6f2da5b 1925
ae5eb026 1926 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 1927 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
50ae34a2 1928 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 1929
7ccc8bd7 1930 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
59c1ec2b 1931 beacon_loss_count * bss_conf->beacon_int));
7ccc8bd7 1932
0c1ad2ca
JB		 1933 sdata->u.mgd.associated = cbss;
1934 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 1935
17e4ec14
JM		 1936 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1937
b115b972
JD		 1938 if (sdata->vif.p2p ||
1939 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
9caf0364 1940 const struct cfg80211_bss_ies *ies;
488dd7b5 1941
9caf0364
JB		 1942 rcu_read_lock();
1943 ies = rcu_dereference(cbss->ies);
1944 if (ies) {
9caf0364
JB		 1945 int ret;
1946
1947 ret = cfg80211_get_p2p_attr(
1948 ies->data, ies->len,
1949 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
67baf663
JD		 1950 (u8 *) &bss_conf->p2p_noa_attr,
1951 sizeof(bss_conf->p2p_noa_attr));
9caf0364 1952 if (ret >= 2) {
67baf663
JD		 1953 sdata->u.mgd.p2p_noa_index =
1954 bss_conf->p2p_noa_attr.index;
9caf0364 1955 bss_info_changed |= BSS_CHANGED_P2P_PS;
9caf0364 1956 }
488dd7b5 1957 }
9caf0364 1958 rcu_read_unlock();
488dd7b5
JB		 1959 }
1960
b291ba11 1961 /* just to be sure */
925e64c3 1962 ieee80211_stop_poll(sdata);
b291ba11 1963
9ac19a90 1964 ieee80211_led_assoc(local, 1);
9306102e 1965
989c6505 1966 if (sdata->u.mgd.have_beacon) {
826262c3
JB		 1967 /*
1968 * If the AP is buggy we may get here with no DTIM period
1969 * known, so assume it's 1 which is the only safe assumption
1970 * in that case, although if the TIM IE is broken powersave
1971 * probably just won't work at all.
1972 */
1973 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
817cee76 1974 bss_conf->beacon_rate = bss->beacon_rate;
989c6505 1975 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
826262c3 1976 } else {
817cee76 1977 bss_conf->beacon_rate = NULL;
e5b900d2 1978 bss_conf->dtim_period = 0;
826262c3 1979 }
e5b900d2 1980
68542962 1981 bss_conf->assoc = 1;
9cef8737 1982
a97c13c3 1983 /* Tell the driver to monitor connection quality (if supported) */
ea086359 1984 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
68542962 1985 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 1986 bss_info_changed |= BSS_CHANGED_CQM;
1987
68542962 1988 /* Enable ARP filtering */
0f19b41e 1989 if (bss_conf->arp_addr_cnt)
68542962 1990 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
68542962 1991
ae5eb026 1992 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 1993
056508dc 1994 mutex_lock(&local->iflist_mtx);
4a733ef1 1995 ieee80211_recalc_ps(local);
056508dc 1996 mutex_unlock(&local->iflist_mtx);
e0cb686f 1997
04ecd257 1998 ieee80211_recalc_smps(sdata);
ab095877
EP		 1999 ieee80211_recalc_ps_vif(sdata);
2000
9ac19a90 2001 netif_carrier_on(sdata->dev);
f0706e82
JB		 2002}
2003
e69e95db 2004static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
37ad3888
JB		 2005 u16 stype, u16 reason, bool tx,
2006 u8 *frame_buf)
aa458d17 2007{
46900298 2008 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17 2009 struct ieee80211_local *local = sdata->local;
3cc5240b 2010 u32 changed = 0;
aa458d17 2011
8d61ffa5 2012 sdata_assert_lock(sdata);
77fdaa12 2013
37ad3888
JB		 2014 if (WARN_ON_ONCE(tx && !frame_buf))
2015 return;
2016
b291ba11
JB		 2017 if (WARN_ON(!ifmgd->associated))
2018 return;
2019
79543d8e
DS		 2020 ieee80211_stop_poll(sdata);
2021
77fdaa12 2022 ifmgd->associated = NULL;
aa458d17
TW		 2023 netif_carrier_off(sdata->dev);
2024
88bc40e8
EP		 2025 /*
2026 * if we want to get out of ps before disassoc (why?) we have
2027 * to do it before sending disassoc, as otherwise the null-packet
2028 * won't be valid.
2029 */
2030 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2031 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2032 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2033 }
2034 local->ps_sdata = NULL;
2035
ab095877
EP		 2036 /* disable per-vif ps */
2037 ieee80211_recalc_ps_vif(sdata);
2038
14f2ae83
EG		 2039 /* make sure ongoing transmission finishes */
2040 synchronize_net();
2041
3b24f4c6
EG		 2042 /*
2043 * drop any frame before deauth/disassoc, this can be data or
2044 * management frame. Since we are disconnecting, we should not
2045 * insist sending these frames which can take time and delay
2046 * the disconnection and possible the roaming.
2047 */
f823981e 2048 if (tx)
3b24f4c6 2049 ieee80211_flush_queues(local, sdata, true);
f823981e 2050
37ad3888
JB		 2051 /* deauthenticate/disassociate now */
2052 if (tx || frame_buf)
88a9e31c
EP		 2053 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
2054 reason, tx, frame_buf);
37ad3888 2055
3b24f4c6 2056 /* flush out frame - make sure the deauth was actually sent */
37ad3888 2057 if (tx)
3b24f4c6 2058 ieee80211_flush_queues(local, sdata, false);
37ad3888 2059
88a9e31c 2060 /* clear bssid only after building the needed mgmt frames */
c84a67a2 2061 eth_zero_addr(ifmgd->bssid);
88a9e31c 2062
37ad3888 2063 /* remove AP and TDLS peers */
d34ba216 2064 sta_info_flush(sdata);
37ad3888
JB		 2065
2066 /* finally reset all BSS / config parameters */
f5e5bf25
TW		 2067 changed |= ieee80211_reset_erp_info(sdata);
2068
f5e5bf25 2069 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 2070 changed |= BSS_CHANGED_ASSOC;
2071 sdata->vif.bss_conf.assoc = false;
f5e5bf25 2072
67baf663
JD		 2073 ifmgd->p2p_noa_index = -1;
2074 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
2075 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
488dd7b5 2076
dd5ecfea 2077 /* on the next assoc, re-program HT/VHT parameters */
ef96a842
BG		 2078 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
2079 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
dd5ecfea
JB		 2080 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
2081 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
322cd406 2082 sdata->flags &= ~IEEE80211_SDATA_MU_MIMO_OWNER;
413ad50a 2083
1ea6f9c0 2084 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
a8302de9 2085
520eb820
KV		 2086 del_timer_sync(&local->dynamic_ps_timer);
2087 cancel_work_sync(&local->dynamic_ps_enable_work);
2088
68542962 2089 /* Disable ARP filtering */
0f19b41e 2090 if (sdata->vif.bss_conf.arp_addr_cnt)
68542962 2091 changed |= BSS_CHANGED_ARP_FILTER;
68542962 2092
3abead59
JB		 2093 sdata->vif.bss_conf.qos = false;
2094 changed |= BSS_CHANGED_QOS;
2095
0aaffa9b
JB		 2096 /* The BSSID (not really interesting) and HT changed */
2097 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 2098 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 2099
3abead59 2100 /* disassociated - set to defaults now */
cec66283 2101 ieee80211_set_wmm_default(sdata, false, false);
3abead59 2102
b9dcf712
JB		 2103 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
2104 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
2105 del_timer_sync(&sdata->u.mgd.timer);
2106 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2d9957cc 2107
826262c3 2108 sdata->vif.bss_conf.dtim_period = 0;
817cee76
AB		 2109 sdata->vif.bss_conf.beacon_rate = NULL;
2110
989c6505 2111 ifmgd->have_beacon = false;
826262c3 2112
028e8da0 2113 ifmgd->flags = 0;
34a3740d 2114 mutex_lock(&local->mtx);
028e8da0 2115 ieee80211_vif_release_channel(sdata);
59af6928
MK		 2116
2117 sdata->vif.csa_active = false;
0c21e632 2118 ifmgd->csa_waiting_bcn = false;
f84eaa10 2119 ifmgd->csa_ignored_same_chan = false;
a46992b4
LC		 2120 if (sdata->csa_block_tx) {
2121 ieee80211_wake_vif_queues(local, sdata,
2122 IEEE80211_QUEUE_STOP_REASON_CSA);
2123 sdata->csa_block_tx = false;
2124 }
34a3740d 2125 mutex_unlock(&local->mtx);
2475b1cc 2126
02219b3a
JB		 2127 /* existing TX TSPEC sessions no longer exist */
2128 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
2129 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
2130
2475b1cc 2131 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
aa458d17 2132}
f0706e82 2133
3cf335d5
KV		 2134void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
2135 struct ieee80211_hdr *hdr)
2136{
2137 /*
2138 * We can postpone the mgd.timer whenever receiving unicast frames
2139 * from AP because we know that the connection is working both ways
2140 * at that time. But multicast frames (and hence also beacons) must
2141 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 2142 * data idle periods for sending the periodic probe request to the
2143 * AP we're connected to.
3cf335d5 2144 */
b291ba11
JB		 2145 if (is_multicast_ether_addr(hdr->addr1))
2146 return;
2147
be099e82 2148 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 2149}
f0706e82 2150
4e5ff376
FF		 2151static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
2152{
2153 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
133d40f9 2154 struct ieee80211_local *local = sdata->local;
4e5ff376 2155
133d40f9 2156 mutex_lock(&local->mtx);
392b9ffb
SG		 2157 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
2158 goto out;
4e5ff376 2159
925e64c3 2160 __ieee80211_stop_poll(sdata);
133d40f9
SG		 2161
2162 mutex_lock(&local->iflist_mtx);
4a733ef1 2163 ieee80211_recalc_ps(local);
133d40f9 2164 mutex_unlock(&local->iflist_mtx);
4e5ff376 2165
30686bf7 2166 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
133d40f9 2167 goto out;
4e5ff376
FF		 2168
2169 /*
2170 * We've received a probe response, but are not sure whether
2171 * we have or will be receiving any beacons or data, so let's
2172 * schedule the timers again, just in case.
2173 */
2174 ieee80211_sta_reset_beacon_monitor(sdata);
2175
2176 mod_timer(&ifmgd->conn_mon_timer,
2177 round_jiffies_up(jiffies +
2178 IEEE80211_CONNECTION_IDLE_TIME));
133d40f9 2179out:
133d40f9 2180 mutex_unlock(&local->mtx);
4e5ff376
FF		 2181}
2182
02219b3a
JB		 2183static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
2184 struct ieee80211_hdr *hdr,
2185 u16 tx_time)
2186{
2187 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2188 u16 tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
2189 int ac = ieee80211_ac_from_tid(tid);
2190 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
2191 unsigned long now = jiffies;
2192
2193 if (likely(!tx_tspec->admitted_time))
2194 return;
2195
2196 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2197 tx_tspec->consumed_tx_time = 0;
2198 tx_tspec->time_slice_start = now;
2199
2200 if (tx_tspec->downgraded) {
2201 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
2202 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2203 }
2204 }
2205
2206 if (tx_tspec->downgraded)
2207 return;
2208
2209 tx_tspec->consumed_tx_time += tx_time;
2210
2211 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
2212 tx_tspec->downgraded = true;
2213 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
2214 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2215 }
2216}
2217
4e5ff376 2218void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
02219b3a 2219 struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
4e5ff376 2220{
02219b3a
JB		 2221 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
2222
75706d0e 2223 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF		 2224 return;
2225
4e5ff376
FF		 2226 if (ieee80211_is_nullfunc(hdr->frame_control) &&
2227 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e 2228 if (ack)
cab1c7fd 2229 ieee80211_sta_reset_conn_monitor(sdata);
04ac3c0e
FF		 2230 else
2231 sdata->u.mgd.nullfunc_failed = true;
4e5ff376 2232 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
cab1c7fd 2233 return;
4e5ff376 2234 }
cab1c7fd
WD		 2235
2236 if (ack)
2237 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF		 2238}
2239
a43abf29
ML		 2240static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2241{
2242 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2243 const u8 *ssid;
f01a067d 2244 u8 *dst = ifmgd->associated->bssid;
180205bd 2245 u8 unicast_limit = max(1, max_probe_tries - 3);
f01a067d
LR		 2246
2247 /*
2248 * Try sending broadcast probe requests for the last three
2249 * probe requests after the first ones failed since some
2250 * buggy APs only support broadcast probe requests.
2251 */
2252 if (ifmgd->probe_send_count >= unicast_limit)
2253 dst = NULL;
a43abf29 2254
4e5ff376
FF		 2255 /*
2256 * When the hardware reports an accurate Tx ACK status, it's
2257 * better to send a nullfunc frame instead of a probe request,
2258 * as it will kick us off the AP quickly if we aren't associated
2259 * anymore. The timeout will be reset if the frame is ACKed by
2260 * the AP.
2261 */
992e68bf
SD		 2262 ifmgd->probe_send_count++;
2263
30686bf7 2264 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) {
04ac3c0e 2265 ifmgd->nullfunc_failed = false;
076cdcb1 2266 ieee80211_send_nullfunc(sdata->local, sdata, false);
04ac3c0e 2267 } else {
88c868c4
SG		 2268 int ssid_len;
2269
9caf0364 2270 rcu_read_lock();
4e5ff376 2271 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
88c868c4
SG		 2272 if (WARN_ON_ONCE(ssid == NULL))
2273 ssid_len = 0;
2274 else
2275 ssid_len = ssid[1];
2276
a73f8e21 2277 ieee80211_send_probe_req(sdata, sdata->vif.addr, dst,
a344d677 2278 ssid + 2, ssid_len, NULL,
1672c0e3 2279 0, (u32) -1, true, 0,
55de908a 2280 ifmgd->associated->channel, false);
9caf0364 2281 rcu_read_unlock();
4e5ff376 2282 }
a43abf29 2283
180205bd 2284 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
8d61ffa5 2285 run_again(sdata, ifmgd->probe_timeout);
a43abf29
ML		 2286}
2287
b291ba11
JB		 2288static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2289 bool beacon)
04de8381 2290{
04de8381 2291 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 2292 bool already = false;
34bfc411 2293
9607e6b6 2294 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 2295 return;
2296
8d61ffa5 2297 sdata_lock(sdata);
77fdaa12
JB		 2298
2299 if (!ifmgd->associated)
2300 goto out;
2301
133d40f9
SG		 2302 mutex_lock(&sdata->local->mtx);
2303
2304 if (sdata->local->tmp_channel || sdata->local->scanning) {
2305 mutex_unlock(&sdata->local->mtx);
2306 goto out;
2307 }
2308
a13fbe54 2309 if (beacon) {
bdcbd8e0 2310 mlme_dbg_ratelimited(sdata,
59c1ec2b
BG		 2311 "detected beacon loss from AP (missed %d beacons) - probing\n",
2312 beacon_loss_count);
bdcbd8e0 2313
98f03342 2314 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
a13fbe54 2315 }
04de8381 2316
b291ba11
JB		 2317 /*
2318 * The driver/our work has already reported this event or the
2319 * connection monitoring has kicked in and we have already sent
2320 * a probe request. Or maybe the AP died and the driver keeps
2321 * reporting until we disassociate...
2322 *
2323 * In either case we have to ignore the current call to this
2324 * function (except for setting the correct probe reason bit)
2325 * because otherwise we would reset the timer every time and
2326 * never check whether we received a probe response!
2327 */
392b9ffb 2328 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
b291ba11
JB		 2329 already = true;
2330
12b5f34d
EP		 2331 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2332
133d40f9
SG		 2333 mutex_unlock(&sdata->local->mtx);
2334
b291ba11
JB		 2335 if (already)
2336 goto out;
2337
4e751843 2338 mutex_lock(&sdata->local->iflist_mtx);
4a733ef1 2339 ieee80211_recalc_ps(sdata->local);
4e751843
JB		 2340 mutex_unlock(&sdata->local->iflist_mtx);
2341
a43abf29
ML		 2342 ifmgd->probe_send_count = 0;
2343 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12 2344 out:
8d61ffa5 2345 sdata_unlock(sdata);
04de8381
KV		 2346}
2347
a619a4c0
JO		 2348struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2349 struct ieee80211_vif *vif)
2350{
2351 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2352 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d9b3b28b 2353 struct cfg80211_bss *cbss;
a619a4c0
JO		 2354 struct sk_buff *skb;
2355 const u8 *ssid;
88c868c4 2356 int ssid_len;
a619a4c0
JO		 2357
2358 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2359 return NULL;
2360
8d61ffa5 2361 sdata_assert_lock(sdata);
a619a4c0 2362
d9b3b28b
EP		 2363 if (ifmgd->associated)
2364 cbss = ifmgd->associated;
2365 else if (ifmgd->auth_data)
2366 cbss = ifmgd->auth_data->bss;
2367 else if (ifmgd->assoc_data)
2368 cbss = ifmgd->assoc_data->bss;
2369 else
a619a4c0
JO		 2370 return NULL;
2371
9caf0364 2372 rcu_read_lock();
d9b3b28b 2373 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
88c868c4
SG		 2374 if (WARN_ON_ONCE(ssid == NULL))
2375 ssid_len = 0;
2376 else
2377 ssid_len = ssid[1];
2378
a344d677 2379 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
55de908a 2380 (u32) -1, cbss->channel,
6b77863b 2381 ssid + 2, ssid_len,
85a237fe 2382 NULL, 0, true);
9caf0364 2383 rcu_read_unlock();
a619a4c0
JO		 2384
2385 return skb;
2386}
2387EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2388
a90faa9d
EG		 2389static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata,
2390 const u8 *buf, size_t len, bool tx,
2391 u16 reason)
2392{
2393 struct ieee80211_event event = {
2394 .type = MLME_EVENT,
2395 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT,
2396 .u.mlme.reason = reason,
2397 };
2398
2399 if (tx)
2400 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len);
2401 else
2402 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len);
2403
2404 drv_event_callback(sdata->local, sdata, &event);
2405}
2406
eef9e54c 2407static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
1e4dcd01 2408{
59af6928 2409 struct ieee80211_local *local = sdata->local;
1e4dcd01 2410 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 2411 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
1e4dcd01 2412
8d61ffa5 2413 sdata_lock(sdata);
1e4dcd01 2414 if (!ifmgd->associated) {
8d61ffa5 2415 sdata_unlock(sdata);
1e4dcd01
JO		 2416 return;
2417 }
2418
37ad3888
JB		 2419 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2420 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
eef9e54c 2421 true, frame_buf);
59af6928 2422 mutex_lock(&local->mtx);
7578d575 2423 sdata->vif.csa_active = false;
0c21e632 2424 ifmgd->csa_waiting_bcn = false;
a46992b4
LC		 2425 if (sdata->csa_block_tx) {
2426 ieee80211_wake_vif_queues(local, sdata,
2427 IEEE80211_QUEUE_STOP_REASON_CSA);
2428 sdata->csa_block_tx = false;
2429 }
59af6928 2430 mutex_unlock(&local->mtx);
7da7cc1d 2431
a90faa9d
EG		 2432 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
2433 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2434
8d61ffa5 2435 sdata_unlock(sdata);
1e4dcd01
JO		 2436}
2437
cc74c0c7 2438static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 2439{
2440 struct ieee80211_sub_if_data *sdata =
2441 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 2442 u.mgd.beacon_connection_loss_work);
a85e1d55 2443 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
a85e1d55 2444
976bd9ef
JB		 2445 if (ifmgd->associated)
2446 ifmgd->beacon_loss_count++;
b291ba11 2447
682bd38b 2448 if (ifmgd->connection_loss) {
882a7c69
JB		 2449 sdata_info(sdata, "Connection to AP %pM lost\n",
2450 ifmgd->bssid);
eef9e54c 2451 __ieee80211_disconnect(sdata);
882a7c69 2452 } else {
1e4dcd01 2453 ieee80211_mgd_probe_ap(sdata, true);
882a7c69
JB		 2454 }
2455}
2456
2457static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2458{
2459 struct ieee80211_sub_if_data *sdata =
2460 container_of(work, struct ieee80211_sub_if_data,
2461 u.mgd.csa_connection_drop_work);
2462
eef9e54c 2463 __ieee80211_disconnect(sdata);
b291ba11
JB		 2464}
2465
04de8381
KV		 2466void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2467{
2468 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 2469 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 2470
b5878a2d
JB		 2471 trace_api_beacon_loss(sdata);
2472
682bd38b 2473 sdata->u.mgd.connection_loss = false;
1e4dcd01 2474 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 2475}
2476EXPORT_SYMBOL(ieee80211_beacon_loss);
2477
1e4dcd01
JO		 2478void ieee80211_connection_loss(struct ieee80211_vif *vif)
2479{
2480 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2481 struct ieee80211_hw *hw = &sdata->local->hw;
2482
b5878a2d
JB		 2483 trace_api_connection_loss(sdata);
2484
682bd38b 2485 sdata->u.mgd.connection_loss = true;
1e4dcd01
JO		 2486 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2487}
2488EXPORT_SYMBOL(ieee80211_connection_loss);
2489
2490
66e67e41
JB		 2491static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2492 bool assoc)
2493{
2494 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2495
8d61ffa5 2496 sdata_assert_lock(sdata);
66e67e41 2497
66e67e41 2498 if (!assoc) {
c1e140bf
EG		 2499 /*
2500 * we are not authenticated yet, the only timer that could be
2501 * running is the timeout for the authentication response which
2502 * which is not relevant anymore.
2503 */
2504 del_timer_sync(&sdata->u.mgd.timer);
66e67e41
JB		 2505 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2506
c84a67a2 2507 eth_zero_addr(sdata->u.mgd.bssid);
66e67e41 2508 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
028e8da0 2509 sdata->u.mgd.flags = 0;
34a3740d 2510 mutex_lock(&sdata->local->mtx);
55de908a 2511 ieee80211_vif_release_channel(sdata);
34a3740d 2512 mutex_unlock(&sdata->local->mtx);
66e67e41
JB		 2513 }
2514
5b112d3d 2515 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
66e67e41
JB		 2516 kfree(auth_data);
2517 sdata->u.mgd.auth_data = NULL;
2518}
2519
c9c99f89
JB		 2520static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2521 bool assoc)
2522{
2523 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2524
2525 sdata_assert_lock(sdata);
2526
2527 if (!assoc) {
2528 /*
2529 * we are not associated yet, the only timer that could be
2530 * running is the timeout for the association response which
2531 * which is not relevant anymore.
2532 */
2533 del_timer_sync(&sdata->u.mgd.timer);
2534 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2535
2536 eth_zero_addr(sdata->u.mgd.bssid);
2537 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2538 sdata->u.mgd.flags = 0;
322cd406 2539 sdata->flags &= ~IEEE80211_SDATA_MU_MIMO_OWNER;
c9c99f89
JB		 2540 mutex_lock(&sdata->local->mtx);
2541 ieee80211_vif_release_channel(sdata);
2542 mutex_unlock(&sdata->local->mtx);
2543 }
2544
2545 kfree(assoc_data);
2546 sdata->u.mgd.assoc_data = NULL;
2547}
2548
66e67e41
JB		 2549static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2550 struct ieee80211_mgmt *mgmt, size_t len)
2551{
1672c0e3 2552 struct ieee80211_local *local = sdata->local;
66e67e41
JB		 2553 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2554 u8 *pos;
2555 struct ieee802_11_elems elems;
1672c0e3 2556 u32 tx_flags = 0;
66e67e41
JB		 2557
2558 pos = mgmt->u.auth.variable;
b2e506bf 2559 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
66e67e41
JB		 2560 if (!elems.challenge)
2561 return;
2562 auth_data->expected_transaction = 4;
a1845fc7 2563 drv_mgd_prepare_tx(sdata->local, sdata);
30686bf7 2564 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1672c0e3
JB		 2565 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2566 IEEE80211_TX_INTFL_MLME_CONN_TX;
700e8ea6 2567 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
66e67e41
JB		 2568 elems.challenge - 2, elems.challenge_len + 2,
2569 auth_data->bss->bssid, auth_data->bss->bssid,
2570 auth_data->key, auth_data->key_len,
1672c0e3 2571 auth_data->key_idx, tx_flags);
66e67e41
JB		 2572}
2573
8d61ffa5
JB		 2574static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2575 struct ieee80211_mgmt *mgmt, size_t len)
66e67e41
JB		 2576{
2577 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2578 u8 bssid[ETH_ALEN];
2579 u16 auth_alg, auth_transaction, status_code;
2580 struct sta_info *sta;
a9409093
EG		 2581 struct ieee80211_event event = {
2582 .type = MLME_EVENT,
2583 .u.mlme.data = AUTH_EVENT,
2584 };
66e67e41 2585
8d61ffa5 2586 sdata_assert_lock(sdata);
66e67e41
JB		 2587
2588 if (len < 24 + 6)
8d61ffa5 2589 return;
66e67e41
JB		 2590
2591 if (!ifmgd->auth_data || ifmgd->auth_data->done)
8d61ffa5 2592 return;
66e67e41
JB		 2593
2594 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2595
b203ca39 2596 if (!ether_addr_equal(bssid, mgmt->bssid))
8d61ffa5 2597 return;
66e67e41
JB		 2598
2599 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2600 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2601 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2602
2603 if (auth_alg != ifmgd->auth_data->algorithm ||
0f4126e8
JM		 2604 auth_transaction != ifmgd->auth_data->expected_transaction) {
2605 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2606 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2607 auth_transaction,
2608 ifmgd->auth_data->expected_transaction);
8d61ffa5 2609 return;
0f4126e8 2610 }
66e67e41
JB		 2611
2612 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2613 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2614 mgmt->sa, status_code);
dac211ec 2615 ieee80211_destroy_auth_data(sdata, false);
6ff57cf8 2616 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
a9409093
EG		 2617 event.u.mlme.status = MLME_DENIED;
2618 event.u.mlme.reason = status_code;
2619 drv_event_callback(sdata->local, sdata, &event);
8d61ffa5 2620 return;
66e67e41
JB		 2621 }
2622
2623 switch (ifmgd->auth_data->algorithm) {
2624 case WLAN_AUTH_OPEN:
2625 case WLAN_AUTH_LEAP:
2626 case WLAN_AUTH_FT:
6b8ece3a 2627 case WLAN_AUTH_SAE:
66e67e41
JB		 2628 break;
2629 case WLAN_AUTH_SHARED_KEY:
2630 if (ifmgd->auth_data->expected_transaction != 4) {
2631 ieee80211_auth_challenge(sdata, mgmt, len);
2632 /* need another frame */
8d61ffa5 2633 return;
66e67e41
JB		 2634 }
2635 break;
2636 default:
2637 WARN_ONCE(1, "invalid auth alg %d",
2638 ifmgd->auth_data->algorithm);
8d61ffa5 2639 return;
66e67e41
JB		 2640 }
2641
a9409093
EG		 2642 event.u.mlme.status = MLME_SUCCESS;
2643 drv_event_callback(sdata->local, sdata, &event);
bdcbd8e0 2644 sdata_info(sdata, "authenticated\n");
66e67e41
JB		 2645 ifmgd->auth_data->done = true;
2646 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
89afe614 2647 ifmgd->auth_data->timeout_started = true;
8d61ffa5 2648 run_again(sdata, ifmgd->auth_data->timeout);
66e67e41 2649
6b8ece3a
JM		 2650 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2651 ifmgd->auth_data->expected_transaction != 2) {
2652 /*
2653 * Report auth frame to user space for processing since another
2654 * round of Authentication frames is still needed.
2655 */
6ff57cf8 2656 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
8d61ffa5 2657 return;
6b8ece3a
JM		 2658 }
2659
66e67e41
JB		 2660 /* move station state to auth */
2661 mutex_lock(&sdata->local->sta_mtx);
2662 sta = sta_info_get(sdata, bssid);
2663 if (!sta) {
2664 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2665 goto out_err;
2666 }
2667 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
bdcbd8e0 2668 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
66e67e41
JB		 2669 goto out_err;
2670 }
2671 mutex_unlock(&sdata->local->sta_mtx);
2672
6ff57cf8 2673 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
8d61ffa5 2674 return;
66e67e41
JB		 2675 out_err:
2676 mutex_unlock(&sdata->local->sta_mtx);
2677 /* ignore frame -- wait for timeout */
66e67e41
JB		 2678}
2679
dfa1ad29
CO		 2680#define case_WLAN(type) \
2681 case WLAN_REASON_##type: return #type
2682
2683static const char *ieee80211_get_reason_code_string(u16 reason_code)
2684{
2685 switch (reason_code) {
2686 case_WLAN(UNSPECIFIED);
2687 case_WLAN(PREV_AUTH_NOT_VALID);
2688 case_WLAN(DEAUTH_LEAVING);
2689 case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2690 case_WLAN(DISASSOC_AP_BUSY);
2691 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2692 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2693 case_WLAN(DISASSOC_STA_HAS_LEFT);
2694 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2695 case_WLAN(DISASSOC_BAD_POWER);
2696 case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2697 case_WLAN(INVALID_IE);
2698 case_WLAN(MIC_FAILURE);
2699 case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2700 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2701 case_WLAN(IE_DIFFERENT);
2702 case_WLAN(INVALID_GROUP_CIPHER);
2703 case_WLAN(INVALID_PAIRWISE_CIPHER);
2704 case_WLAN(INVALID_AKMP);
2705 case_WLAN(UNSUPP_RSN_VERSION);
2706 case_WLAN(INVALID_RSN_IE_CAP);
2707 case_WLAN(IEEE8021X_FAILED);
2708 case_WLAN(CIPHER_SUITE_REJECTED);
2709 case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2710 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2711 case_WLAN(DISASSOC_LOW_ACK);
2712 case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2713 case_WLAN(QSTA_LEAVE_QBSS);
2714 case_WLAN(QSTA_NOT_USE);
2715 case_WLAN(QSTA_REQUIRE_SETUP);
2716 case_WLAN(QSTA_TIMEOUT);
2717 case_WLAN(QSTA_CIPHER_NOT_SUPP);
2718 case_WLAN(MESH_PEER_CANCELED);
2719 case_WLAN(MESH_MAX_PEERS);
2720 case_WLAN(MESH_CONFIG);
2721 case_WLAN(MESH_CLOSE);
2722 case_WLAN(MESH_MAX_RETRIES);
2723 case_WLAN(MESH_CONFIRM_TIMEOUT);
2724 case_WLAN(MESH_INVALID_GTK);
2725 case_WLAN(MESH_INCONSISTENT_PARAM);
2726 case_WLAN(MESH_INVALID_SECURITY);
2727 case_WLAN(MESH_PATH_ERROR);
2728 case_WLAN(MESH_PATH_NOFORWARD);
2729 case_WLAN(MESH_PATH_DEST_UNREACHABLE);
2730 case_WLAN(MAC_EXISTS_IN_MBSS);
2731 case_WLAN(MESH_CHAN_REGULATORY);
2732 case_WLAN(MESH_CHAN);
2733 default: return "<unknown>";
2734 }
2735}
66e67e41 2736
8d61ffa5
JB		 2737static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2738 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2739{
46900298 2740 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
c9c99f89 2741 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
f0706e82 2742
8d61ffa5 2743 sdata_assert_lock(sdata);
66e67e41 2744
f4ea83dd 2745 if (len < 24 + 2)
8d61ffa5 2746 return;
f0706e82 2747
c9c99f89
JB		 2748 if (ifmgd->associated &&
2749 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) {
2750 const u8 *bssid = ifmgd->associated->bssid;
77fdaa12 2751
c9c99f89
JB		 2752 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
2753 bssid, reason_code,
2754 ieee80211_get_reason_code_string(reason_code));
f0706e82 2755
c9c99f89 2756 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
f0706e82 2757
c9c99f89
JB		 2758 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false,
2759 reason_code);
2760 return;
2761 }
77fdaa12 2762
c9c99f89
JB		 2763 if (ifmgd->assoc_data &&
2764 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
2765 const u8 *bssid = ifmgd->assoc_data->bss->bssid;
37ad3888 2766
c9c99f89
JB		 2767 sdata_info(sdata,
2768 "deauthenticated from %pM while associating (Reason: %u=%s)\n",
2769 bssid, reason_code,
2770 ieee80211_get_reason_code_string(reason_code));
2771
2772 ieee80211_destroy_assoc_data(sdata, false);
2773
2774 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2775 return;
2776 }
f0706e82
JB		 2777}
2778
2779
8d61ffa5
JB		 2780static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2781 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2782{
46900298 2783 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 2784 u16 reason_code;
2785
8d61ffa5 2786 sdata_assert_lock(sdata);
77fdaa12 2787
66e67e41 2788 if (len < 24 + 2)
8d61ffa5 2789 return;
77fdaa12 2790
66e67e41 2791 if (!ifmgd->associated ||
b203ca39 2792 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
8d61ffa5 2793 return;
f0706e82
JB		 2794
2795 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2796
bdcbd8e0
JB		 2797 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2798 mgmt->sa, reason_code);
f0706e82 2799
37ad3888
JB		 2800 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2801
a90faa9d 2802 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code);
f0706e82
JB		 2803}
2804
c74d084f
CL		 2805static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2806 u8 *supp_rates, unsigned int supp_rates_len,
2807 u32 *rates, u32 *basic_rates,
2808 bool *have_higher_than_11mbit,
2103dec1
SW		 2809 int *min_rate, int *min_rate_index,
2810 int shift, u32 rate_flags)
c74d084f
CL		 2811{
2812 int i, j;
2813
2814 for (i = 0; i < supp_rates_len; i++) {
2103dec1 2815 int rate = supp_rates[i] & 0x7f;
c74d084f
CL		 2816 bool is_basic = !!(supp_rates[i] & 0x80);
2817
2103dec1 2818 if ((rate * 5 * (1 << shift)) > 110)
c74d084f
CL		 2819 *have_higher_than_11mbit = true;
2820
2821 /*
2822 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2823 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2824 *
2825 * Note: Even through the membership selector and the basic
2826 * rate flag share the same bit, they are not exactly
2827 * the same.
2828 */
2829 if (!!(supp_rates[i] & 0x80) &&
2830 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2831 continue;
2832
2833 for (j = 0; j < sband->n_bitrates; j++) {
2103dec1
SW		 2834 struct ieee80211_rate *br;
2835 int brate;
2836
2837 br = &sband->bitrates[j];
2838 if ((rate_flags & br->flags) != rate_flags)
2839 continue;
2840
2841 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2842 if (brate == rate) {
c74d084f
CL		 2843 *rates |= BIT(j);
2844 if (is_basic)
2845 *basic_rates |= BIT(j);
2103dec1
SW		 2846 if ((rate * 5) < *min_rate) {
2847 *min_rate = rate * 5;
c74d084f
CL		 2848 *min_rate_index = j;
2849 }
2850 break;
2851 }
2852 }
2853 }
2854}
f0706e82 2855
66e67e41
JB		 2856static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2857 struct cfg80211_bss *cbss,
af6b6374 2858 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2859{
46900298 2860 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 2861 struct ieee80211_local *local = sdata->local;
8318d78a 2862 struct ieee80211_supported_band *sband;
f0706e82 2863 struct sta_info *sta;
af6b6374 2864 u8 *pos;
af6b6374 2865 u16 capab_info, aid;
f0706e82 2866 struct ieee802_11_elems elems;
bda3933a 2867 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
35d865af
JB		 2868 const struct cfg80211_bss_ies *bss_ies = NULL;
2869 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
ae5eb026 2870 u32 changed = 0;
c74d084f 2871 int err;
35d865af 2872 bool ret;
f0706e82 2873
af6b6374 2874 /* AssocResp and ReassocResp have identical structure */
f0706e82 2875
f0706e82 2876 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 2877 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 2878
1dd84aa2 2879 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
bdcbd8e0
JB		 2880 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2881 aid);
1dd84aa2
JB		 2882 aid &= ~(BIT(15) | BIT(14));
2883
05cb9108
JB		 2884 ifmgd->broken_ap = false;
2885
2886 if (aid == 0 || aid > IEEE80211_MAX_AID) {
bdcbd8e0
JB		 2887 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2888 aid);
05cb9108
JB		 2889 aid = 0;
2890 ifmgd->broken_ap = true;
2891 }
2892
af6b6374 2893 pos = mgmt->u.assoc_resp.variable;
b2e506bf 2894 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
af6b6374 2895
f0706e82 2896 if (!elems.supp_rates) {
bdcbd8e0 2897 sdata_info(sdata, "no SuppRates element in AssocResp\n");
af6b6374 2898 return false;
f0706e82
JB		 2899 }
2900
46900298 2901 ifmgd->aid = aid;
9041c1fa
AN		 2902 ifmgd->tdls_chan_switch_prohibited =
2903 elems.ext_capab && elems.ext_capab_len >= 5 &&
2904 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
f0706e82 2905
35d865af
JB		 2906 /*
2907 * Some APs are erroneously not including some information in their
2908 * (re)association response frames. Try to recover by using the data
2909 * from the beacon or probe response. This seems to afflict mobile
2910 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2911 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2912 */
2913 if ((assoc_data->wmm && !elems.wmm_param) ||
2914 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2915 (!elems.ht_cap_elem || !elems.ht_operation)) ||
2916 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2917 (!elems.vht_cap_elem || !elems.vht_operation))) {
2918 const struct cfg80211_bss_ies *ies;
2919 struct ieee802_11_elems bss_elems;
2920
2921 rcu_read_lock();
2922 ies = rcu_dereference(cbss->ies);
2923 if (ies)
2924 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2925 GFP_ATOMIC);
2926 rcu_read_unlock();
2927 if (!bss_ies)
2928 return false;
2929
2930 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2931 false, &bss_elems);
2932 if (assoc_data->wmm &&
2933 !elems.wmm_param && bss_elems.wmm_param) {
2934 elems.wmm_param = bss_elems.wmm_param;
2935 sdata_info(sdata,
2936 "AP bug: WMM param missing from AssocResp\n");
2937 }
2938
2939 /*
2940 * Also check if we requested HT/VHT, otherwise the AP doesn't
2941 * have to include the IEs in the (re)association response.
2942 */
2943 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2944 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2945 elems.ht_cap_elem = bss_elems.ht_cap_elem;
2946 sdata_info(sdata,
2947 "AP bug: HT capability missing from AssocResp\n");
2948 }
2949 if (!elems.ht_operation && bss_elems.ht_operation &&
2950 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2951 elems.ht_operation = bss_elems.ht_operation;
2952 sdata_info(sdata,
2953 "AP bug: HT operation missing from AssocResp\n");
2954 }
2955 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2956 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2957 elems.vht_cap_elem = bss_elems.vht_cap_elem;
2958 sdata_info(sdata,
2959 "AP bug: VHT capa missing from AssocResp\n");
2960 }
2961 if (!elems.vht_operation && bss_elems.vht_operation &&
2962 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2963 elems.vht_operation = bss_elems.vht_operation;
2964 sdata_info(sdata,
2965 "AP bug: VHT operation missing from AssocResp\n");
2966 }
2967 }
2968
30eb1dc2
JB		 2969 /*
2970 * We previously checked these in the beacon/probe response, so
2971 * they should be present here. This is just a safety net.
2972 */
2973 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2974 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2975 sdata_info(sdata,
35d865af
JB		 2976 "HT AP is missing WMM params or HT capability/operation\n");
2977 ret = false;
2978 goto out;
30eb1dc2
JB		 2979 }
2980
2981 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2982 (!elems.vht_cap_elem || !elems.vht_operation)) {
2983 sdata_info(sdata,
35d865af
JB		 2984 "VHT AP is missing VHT capability/operation\n");
2985 ret = false;
2986 goto out;
30eb1dc2
JB		 2987 }
2988
2a33bee2
GE		 2989 mutex_lock(&sdata->local->sta_mtx);
2990 /*
2991 * station info was already allocated and inserted before
2992 * the association and should be available to us
2993 */
7852e361 2994 sta = sta_info_get(sdata, cbss->bssid);
2a33bee2
GE		 2995 if (WARN_ON(!sta)) {
2996 mutex_unlock(&sdata->local->sta_mtx);
35d865af
JB		 2997 ret = false;
2998 goto out;
77fdaa12 2999 }
05e5e883 3000
55de908a 3001 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
f709fc69 3002
30eb1dc2 3003 /* Set up internal HT/VHT capabilities */
a8243b72 3004 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
ef96a842 3005 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
e1a0c6b3 3006 elems.ht_cap_elem, sta);
64f68e5d 3007
818255ea
MP		 3008 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
3009 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
4a34215e 3010 elems.vht_cap_elem, sta);
818255ea 3011
30eb1dc2
JB		 3012 /*
3013 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
3014 * in their association response, so ignore that data for our own
3015 * configuration. If it changed since the last beacon, we'll get the
3016 * next beacon and update then.
3017 */
1128958d 3018
bee7f586
JB		 3019 /*
3020 * If an operating mode notification IE is present, override the
3021 * NSS calculation (that would be done in rate_control_rate_init())
3022 * and use the # of streams from that element.
3023 */
3024 if (elems.opmode_notif &&
3025 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
3026 u8 nss;
3027
3028 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
3029 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
3030 nss += 1;
3031 sta->sta.rx_nss = nss;
3032 }
3033
4b7679a5 3034 rate_control_rate_init(sta);
f0706e82 3035
93f0490e 3036 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) {
c2c98fde 3037 set_sta_flag(sta, WLAN_STA_MFP);
93f0490e
T		 3038 sta->sta.mfp = true;
3039 } else {
3040 sta->sta.mfp = false;
3041 }
5394af4d 3042
527871d7 3043 sta->sta.wme = elems.wmm_param && local->hw.queues >= IEEE80211_NUM_ACS;
ddf4ac53 3044
3e4d40fa 3045 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
c8987876
JB		 3046 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
3047 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
3048 if (err) {
bdcbd8e0
JB		 3049 sdata_info(sdata,
3050 "failed to move station %pM to desired state\n",
3051 sta->sta.addr);
c8987876
JB		 3052 WARN_ON(__sta_info_destroy(sta));
3053 mutex_unlock(&sdata->local->sta_mtx);
35d865af
JB		 3054 ret = false;
3055 goto out;
c8987876
JB		 3056 }
3057
7852e361 3058 mutex_unlock(&sdata->local->sta_mtx);
ddf4ac53 3059
f2176d72
JO		 3060 /*
3061 * Always handle WMM once after association regardless
3062 * of the first value the AP uses. Setting -1 here has
3063 * that effect because the AP values is an unsigned
3064 * 4-bit value.
3065 */
3066 ifmgd->wmm_last_param_set = -1;
3067
2ed77ea6 3068 if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
cec66283 3069 ieee80211_set_wmm_default(sdata, false, false);
2ed77ea6
JB		 3070 } else if (!ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3071 elems.wmm_param_len)) {
3072 /* still enable QoS since we might have HT/VHT */
3073 ieee80211_set_wmm_default(sdata, false, true);
3074 /* set the disable-WMM flag in this case to disable
3075 * tracking WMM parameter changes in the beacon if
3076 * the parameters weren't actually valid. Doing so
3077 * avoids changing parameters very strangely when
3078 * the AP is going back and forth between valid and
3079 * invalid parameters.
3080 */
3081 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
3082 }
3abead59 3083 changed |= BSS_CHANGED_QOS;
f0706e82 3084
60f8b39c
JB		 3085 /* set AID and assoc capability,
3086 * ieee80211_set_associated() will tell the driver */
3087 bss_conf->aid = aid;
3088 bss_conf->assoc_capability = capab_info;
0c1ad2ca 3089 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 3090
d524215f
FF		 3091 /*
3092 * If we're using 4-addr mode, let the AP know that we're
3093 * doing so, so that it can create the STA VLAN on its side
3094 */
3095 if (ifmgd->use_4addr)
3096 ieee80211_send_4addr_nullfunc(local, sdata);
3097
15b7b062 3098 /*
b291ba11
JB		 3099 * Start timer to probe the connection to the AP now.
3100 * Also start the timer that will detect beacon loss.
15b7b062 3101 */
b291ba11 3102 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 3103 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 3104
35d865af
JB		 3105 ret = true;
3106 out:
3107 kfree(bss_ies);
3108 return ret;
f0706e82
JB		 3109}
3110
8d61ffa5
JB		 3111static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
3112 struct ieee80211_mgmt *mgmt,
3113 size_t len)
66e67e41
JB		 3114{
3115 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3116 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3117 u16 capab_info, status_code, aid;
3118 struct ieee802_11_elems elems;
b0b6aa2c 3119 int ac, uapsd_queues = -1;
66e67e41
JB		 3120 u8 *pos;
3121 bool reassoc;
8d61ffa5 3122 struct cfg80211_bss *bss;
d0d1a12f
EG		 3123 struct ieee80211_event event = {
3124 .type = MLME_EVENT,
3125 .u.mlme.data = ASSOC_EVENT,
3126 };
66e67e41 3127
8d61ffa5 3128 sdata_assert_lock(sdata);
66e67e41
JB		 3129
3130 if (!assoc_data)
8d61ffa5 3131 return;
b203ca39 3132 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
8d61ffa5 3133 return;
66e67e41
JB		 3134
3135 /*
3136 * AssocResp and ReassocResp have identical structure, so process both
3137 * of them in this function.
3138 */
3139
3140 if (len < 24 + 6)
8d61ffa5 3141 return;
66e67e41
JB		 3142
3143 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
3144 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3145 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
3146 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3147
bdcbd8e0
JB		 3148 sdata_info(sdata,
3149 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3150 reassoc ? "Rea" : "A", mgmt->sa,
3151 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
66e67e41
JB		 3152
3153 pos = mgmt->u.assoc_resp.variable;
b2e506bf 3154 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
66e67e41
JB		 3155
3156 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
79ba1d89
JB		 3157 elems.timeout_int &&
3158 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
66e67e41 3159 u32 tu, ms;
79ba1d89 3160 tu = le32_to_cpu(elems.timeout_int->value);
66e67e41 3161 ms = tu * 1024 / 1000;
bdcbd8e0
JB		 3162 sdata_info(sdata,
3163 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3164 mgmt->sa, tu, ms);
66e67e41 3165 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
89afe614 3166 assoc_data->timeout_started = true;
66e67e41 3167 if (ms > IEEE80211_ASSOC_TIMEOUT)
8d61ffa5
JB		 3168 run_again(sdata, assoc_data->timeout);
3169 return;
66e67e41
JB		 3170 }
3171
8d61ffa5 3172 bss = assoc_data->bss;
66e67e41
JB		 3173
3174 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 3175 sdata_info(sdata, "%pM denied association (code=%d)\n",
3176 mgmt->sa, status_code);
66e67e41 3177 ieee80211_destroy_assoc_data(sdata, false);
d0d1a12f
EG		 3178 event.u.mlme.status = MLME_DENIED;
3179 event.u.mlme.reason = status_code;
3180 drv_event_callback(sdata->local, sdata, &event);
66e67e41 3181 } else {
8d61ffa5 3182 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
66e67e41 3183 /* oops -- internal error -- send timeout for now */
10a9109f 3184 ieee80211_destroy_assoc_data(sdata, false);
959867fa 3185 cfg80211_assoc_timeout(sdata->dev, bss);
8d61ffa5 3186 return;
66e67e41 3187 }
d0d1a12f
EG		 3188 event.u.mlme.status = MLME_SUCCESS;
3189 drv_event_callback(sdata->local, sdata, &event);
635d999f 3190 sdata_info(sdata, "associated\n");
79ebfb85
JB		 3191
3192 /*
3193 * destroy assoc_data afterwards, as otherwise an idle
3194 * recalc after assoc_data is NULL but before associated
3195 * is set can cause the interface to go idle
3196 */
3197 ieee80211_destroy_assoc_data(sdata, true);
b0b6aa2c
EP		 3198
3199 /* get uapsd queues configuration */
3200 uapsd_queues = 0;
3201 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
3202 if (sdata->tx_conf[ac].uapsd)
3203 uapsd_queues |= BIT(ac);
66e67e41
JB		 3204 }
3205
b0b6aa2c 3206 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues);
66e67e41 3207}
8e3c1b77 3208
98c8fccf 3209static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
8e3c1b77 3210 struct ieee80211_mgmt *mgmt, size_t len,
98c8fccf 3211 struct ieee80211_rx_status *rx_status,
d45c4172 3212 struct ieee802_11_elems *elems)
98c8fccf
JB		 3213{
3214 struct ieee80211_local *local = sdata->local;
c2b13452 3215 struct ieee80211_bss *bss;
98c8fccf 3216 struct ieee80211_channel *channel;
56007a02 3217
8d61ffa5 3218 sdata_assert_lock(sdata);
b4f286a1 3219
3afc2167
EG		 3220 channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
3221 if (!channel)
98c8fccf
JB		 3222 return;
3223
98c8fccf 3224 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
d45c4172 3225 channel);
817cee76 3226 if (bss) {
817cee76 3227 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
d2722f8b 3228 ieee80211_rx_bss_put(local, bss);
817cee76 3229 }
f0706e82
JB		 3230}
3231
3232
f698d856 3233static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 3234 struct sk_buff *skb)
f0706e82 3235{
af6b6374 3236 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 3237 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 3238 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
3239 size_t baselen, len = skb->len;
ae6a44e3
EK		 3240 struct ieee802_11_elems elems;
3241
15b7b062
KV		 3242 ifmgd = &sdata->u.mgd;
3243
8d61ffa5 3244 sdata_assert_lock(sdata);
77fdaa12 3245
b203ca39 3246 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
8e7cdbb6
TW		 3247 return; /* ignore ProbeResp to foreign address */
3248
ae6a44e3
EK		 3249 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
3250 if (baselen > len)
3251 return;
3252
3253 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
b2e506bf 3254 false, &elems);
ae6a44e3 3255
d45c4172 3256 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
9859b81e 3257
77fdaa12 3258 if (ifmgd->associated &&
b203ca39 3259 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
4e5ff376 3260 ieee80211_reset_ap_probe(sdata);
f0706e82
JB		 3261}
3262
d91f36db
JB		 3263/*
3264 * This is the canonical list of information elements we care about,
3265 * the filter code also gives us all changes to the Microsoft OUI
c8d65917
SG		 3266 * (00:50:F2) vendor IE which is used for WMM which we need to track,
3267 * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3268 * changes to requested client power.
d91f36db
JB		 3269 *
3270 * We implement beacon filtering in software since that means we can
3271 * avoid processing the frame here and in cfg80211, and userspace
3272 * will not be able to tell whether the hardware supports it or not.
3273 *
3274 * XXX: This list needs to be dynamic -- userspace needs to be able to
3275 * add items it requires. It also needs to be able to tell us to
3276 * look out for other vendor IEs.
3277 */
3278static const u64 care_about_ies =
1d4df3a5
JB		 3279 (1ULL << WLAN_EID_COUNTRY) |
3280 (1ULL << WLAN_EID_ERP_INFO) |
3281 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
3282 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
3283 (1ULL << WLAN_EID_HT_CAPABILITY) |
70a3fd6c
JB		 3284 (1ULL << WLAN_EID_HT_OPERATION) |
3285 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN);
d91f36db 3286
8d61ffa5
JB		 3287static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
3288 struct ieee80211_mgmt *mgmt, size_t len,
3289 struct ieee80211_rx_status *rx_status)
f0706e82 3290{
d91f36db 3291 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 3292 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 3293 size_t baselen;
3294 struct ieee802_11_elems elems;
f698d856 3295 struct ieee80211_local *local = sdata->local;
55de908a
JB		 3296 struct ieee80211_chanctx_conf *chanctx_conf;
3297 struct ieee80211_channel *chan;
bee7f586 3298 struct sta_info *sta;
471b3efd 3299 u32 changed = 0;
f87ad637 3300 bool erp_valid;
7a5158ef 3301 u8 erp_value = 0;
d91f36db 3302 u32 ncrc;
77fdaa12 3303 u8 *bssid;
8d61ffa5 3304 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
77fdaa12 3305
8d61ffa5 3306 sdata_assert_lock(sdata);
f0706e82 3307
ae6a44e3
EK		 3308 /* Process beacon from the current BSS */
3309 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3310 if (baselen > len)
8d61ffa5 3311 return;
ae6a44e3 3312
55de908a
JB		 3313 rcu_read_lock();
3314 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3315 if (!chanctx_conf) {
3316 rcu_read_unlock();
8d61ffa5 3317 return;
55de908a
JB		 3318 }
3319
4bf88530 3320 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
55de908a 3321 rcu_read_unlock();
8d61ffa5 3322 return;
55de908a 3323 }
4bf88530 3324 chan = chanctx_conf->def.chan;
55de908a 3325 rcu_read_unlock();
f0706e82 3326
c65dd147 3327 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
b203ca39 3328 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
66e67e41 3329 ieee802_11_parse_elems(mgmt->u.beacon.variable,
b2e506bf 3330 len - baselen, false, &elems);
77fdaa12 3331
d45c4172 3332 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
482a9c74
AB		 3333 if (elems.tim && !elems.parse_error) {
3334 const struct ieee80211_tim_ie *tim_ie = elems.tim;
3335 ifmgd->dtim_period = tim_ie->dtim_period;
3336 }
989c6505 3337 ifmgd->have_beacon = true;
c65dd147 3338 ifmgd->assoc_data->need_beacon = false;
30686bf7 3339 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
ef429dad
JB		 3340 sdata->vif.bss_conf.sync_tsf =
3341 le64_to_cpu(mgmt->u.beacon.timestamp);
3342 sdata->vif.bss_conf.sync_device_ts =
3343 rx_status->device_timestamp;
3344 if (elems.tim)
3345 sdata->vif.bss_conf.sync_dtim_count =
3346 elems.tim->dtim_count;
3347 else
3348 sdata->vif.bss_conf.sync_dtim_count = 0;
3349 }
66e67e41
JB		 3350 /* continue assoc process */
3351 ifmgd->assoc_data->timeout = jiffies;
89afe614 3352 ifmgd->assoc_data->timeout_started = true;
8d61ffa5
JB		 3353 run_again(sdata, ifmgd->assoc_data->timeout);
3354 return;
66e67e41 3355 }
77fdaa12 3356
66e67e41 3357 if (!ifmgd->associated ||
b203ca39 3358 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
8d61ffa5 3359 return;
66e67e41 3360 bssid = ifmgd->associated->bssid;
f0706e82 3361
17e4ec14 3362 /* Track average RSSI from the Beacon frames of the current AP */
17e4ec14
JM		 3363 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3364 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
338c17ae 3365 ewma_beacon_signal_init(&ifmgd->ave_beacon_signal);
17e4ec14 3366 ifmgd->last_cqm_event_signal = 0;
391a200a 3367 ifmgd->count_beacon_signal = 1;
615f7b9b 3368 ifmgd->last_ave_beacon_signal = 0;
17e4ec14 3369 } else {
391a200a 3370 ifmgd->count_beacon_signal++;
17e4ec14 3371 }
615f7b9b 3372
338c17ae
JB		 3373 ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal);
3374
615f7b9b
MV		 3375 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3376 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
338c17ae 3377 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
615f7b9b 3378 int last_sig = ifmgd->last_ave_beacon_signal;
a8182929
EG		 3379 struct ieee80211_event event = {
3380 .type = RSSI_EVENT,
3381 };
615f7b9b
MV		 3382
3383 /*
3384 * if signal crosses either of the boundaries, invoke callback
3385 * with appropriate parameters
3386 */
3387 if (sig > ifmgd->rssi_max_thold &&
3388 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3389 ifmgd->last_ave_beacon_signal = sig;
a8182929
EG		 3390 event.u.rssi.data = RSSI_EVENT_HIGH;
3391 drv_event_callback(local, sdata, &event);
615f7b9b
MV		 3392 } else if (sig < ifmgd->rssi_min_thold &&
3393 (last_sig >= ifmgd->rssi_max_thold ||
3394 last_sig == 0)) {
3395 ifmgd->last_ave_beacon_signal = sig;
a8182929
EG		 3396 event.u.rssi.data = RSSI_EVENT_LOW;
3397 drv_event_callback(local, sdata, &event);
615f7b9b
MV		 3398 }
3399 }
3400
17e4ec14 3401 if (bss_conf->cqm_rssi_thold &&
391a200a 3402 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
ea086359 3403 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
338c17ae 3404 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
17e4ec14
JM		 3405 int last_event = ifmgd->last_cqm_event_signal;
3406 int thold = bss_conf->cqm_rssi_thold;
3407 int hyst = bss_conf->cqm_rssi_hyst;
338c17ae 3408
17e4ec14
JM		 3409 if (sig < thold &&
3410 (last_event == 0 || sig < last_event - hyst)) {
3411 ifmgd->last_cqm_event_signal = sig;
3412 ieee80211_cqm_rssi_notify(
3413 &sdata->vif,
3414 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3415 GFP_KERNEL);
3416 } else if (sig > thold &&
3417 (last_event == 0 || sig > last_event + hyst)) {
3418 ifmgd->last_cqm_event_signal = sig;
3419 ieee80211_cqm_rssi_notify(
3420 &sdata->vif,
3421 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3422 GFP_KERNEL);
3423 }
3424 }
3425
392b9ffb 3426 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
bdcbd8e0 3427 mlme_dbg_ratelimited(sdata,
112c31f0 3428 "cancelling AP probe due to a received beacon\n");
392b9ffb 3429 ieee80211_reset_ap_probe(sdata);
92778180
JM		 3430 }
3431
b291ba11
JB		 3432 /*
3433 * Push the beacon loss detection into the future since
3434 * we are processing a beacon from the AP just now.
3435 */
d3a910a8 3436 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 3437
d91f36db
JB		 3438 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3439 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
b2e506bf 3440 len - baselen, false, &elems,
d91f36db
JB		 3441 care_about_ies, ncrc);
3442
90d13e8f
JB		 3443 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
3444 ieee80211_check_tim(elems.tim, elems.tim_len, ifmgd->aid)) {
3445 if (local->hw.conf.dynamic_ps_timeout > 0) {
3446 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3447 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3448 ieee80211_hw_config(local,
3449 IEEE80211_CONF_CHANGE_PS);
572e0012 3450 }
076cdcb1 3451 ieee80211_send_nullfunc(local, sdata, false);
90d13e8f
JB		 3452 } else if (!local->pspolling && sdata->u.mgd.powersave) {
3453 local->pspolling = true;
3454
3455 /*
3456 * Here is assumed that the driver will be
3457 * able to send ps-poll frame and receive a
3458 * response even though power save mode is
3459 * enabled, but some drivers might require
3460 * to disable power save here. This needs
3461 * to be investigated.
3462 */
3463 ieee80211_send_pspoll(local, sdata);
a97b77b9
VN		 3464 }
3465 }
7a5158ef 3466
b115b972
JD		 3467 if (sdata->vif.p2p ||
3468 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
67baf663 3469 struct ieee80211_p2p_noa_attr noa = {};
488dd7b5
JB		 3470 int ret;
3471
3472 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3473 len - baselen,
3474 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
934457ee 3475 (u8 *) &noa, sizeof(noa));
67baf663
JD		 3476 if (ret >= 2) {
3477 if (sdata->u.mgd.p2p_noa_index != noa.index) {
3478 /* valid noa_attr and index changed */
3479 sdata->u.mgd.p2p_noa_index = noa.index;
3480 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3481 changed |= BSS_CHANGED_P2P_PS;
3482 /*
3483 * make sure we update all information, the CRC
3484 * mechanism doesn't look at P2P attributes.
3485 */
3486 ifmgd->beacon_crc_valid = false;
3487 }
3488 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3489 /* noa_attr not found and we had valid noa_attr before */
3490 sdata->u.mgd.p2p_noa_index = -1;
3491 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
488dd7b5 3492 changed |= BSS_CHANGED_P2P_PS;
488dd7b5
JB		 3493 ifmgd->beacon_crc_valid = false;
3494 }
3495 }
3496
0c21e632
LC		 3497 if (ifmgd->csa_waiting_bcn)
3498 ieee80211_chswitch_post_beacon(sdata);
3499
2ecc3905
AB		 3500 /*
3501 * Update beacon timing and dtim count on every beacon appearance. This
3502 * will allow the driver to use the most updated values. Do it before
3503 * comparing this one with last received beacon.
3504 * IMPORTANT: These parameters would possibly be out of sync by the time
3505 * the driver will use them. The synchronized view is currently
3506 * guaranteed only in certain callbacks.
3507 */
30686bf7 3508 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
2ecc3905
AB		 3509 sdata->vif.bss_conf.sync_tsf =
3510 le64_to_cpu(mgmt->u.beacon.timestamp);
3511 sdata->vif.bss_conf.sync_device_ts =
3512 rx_status->device_timestamp;
3513 if (elems.tim)
3514 sdata->vif.bss_conf.sync_dtim_count =
3515 elems.tim->dtim_count;
3516 else
3517 sdata->vif.bss_conf.sync_dtim_count = 0;
3518 }
3519
d8ec4433 3520 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
8d61ffa5 3521 return;
30196673 3522 ifmgd->beacon_crc = ncrc;
d8ec4433 3523 ifmgd->beacon_crc_valid = true;
30196673 3524
d45c4172 3525 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
7d25745d 3526
d70b7616 3527 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
2ba45384 3528 rx_status->device_timestamp,
d70b7616
JB		 3529 &elems, true);
3530
095d81ce
JB		 3531 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3532 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
7d25745d
JB		 3533 elems.wmm_param_len))
3534 changed |= BSS_CHANGED_QOS;
3535
c65dd147
EG		 3536 /*
3537 * If we haven't had a beacon before, tell the driver about the
ef429dad 3538 * DTIM period (and beacon timing if desired) now.
c65dd147 3539 */
989c6505 3540 if (!ifmgd->have_beacon) {
c65dd147
EG		 3541 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3542 if (elems.tim)
3543 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3544 else
3545 bss_conf->dtim_period = 1;
ef429dad 3546
989c6505
AB		 3547 changed |= BSS_CHANGED_BEACON_INFO;
3548 ifmgd->have_beacon = true;
482a9c74
AB		 3549
3550 mutex_lock(&local->iflist_mtx);
4a733ef1 3551 ieee80211_recalc_ps(local);
482a9c74
AB		 3552 mutex_unlock(&local->iflist_mtx);
3553
ce857888 3554 ieee80211_recalc_ps_vif(sdata);
c65dd147
EG		 3555 }
3556
1946bed9 3557 if (elems.erp_info) {
7a5158ef
JB		 3558 erp_valid = true;
3559 erp_value = elems.erp_info[0];
3560 } else {
3561 erp_valid = false;
50c4afb9 3562 }
7a5158ef
JB		 3563 changed |= ieee80211_handle_bss_capability(sdata,
3564 le16_to_cpu(mgmt->u.beacon.capab_info),
3565 erp_valid, erp_value);
f0706e82 3566
1128958d 3567 mutex_lock(&local->sta_mtx);
bee7f586
JB		 3568 sta = sta_info_get(sdata, bssid);
3569
53b954ee
EP		 3570 if (ieee80211_config_bw(sdata, sta,
3571 elems.ht_cap_elem, elems.ht_operation,
30eb1dc2
JB		 3572 elems.vht_operation, bssid, &changed)) {
3573 mutex_unlock(&local->sta_mtx);
3574 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3575 WLAN_REASON_DEAUTH_LEAVING,
3576 true, deauth_buf);
a90faa9d
EG		 3577 ieee80211_report_disconnect(sdata, deauth_buf,
3578 sizeof(deauth_buf), true,
3579 WLAN_REASON_DEAUTH_LEAVING);
8d61ffa5 3580 return;
30eb1dc2 3581 }
bee7f586
JB		 3582
3583 if (sta && elems.opmode_notif)
3584 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
cf1e05c6 3585 rx_status->band);
1128958d 3586 mutex_unlock(&local->sta_mtx);
d3c990fb 3587
24a4e400
SG		 3588 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
3589 elems.country_elem,
3590 elems.country_elem_len,
c8d65917
SG		 3591 elems.pwr_constr_elem,
3592 elems.cisco_dtpc_elem);
3f2355cb 3593
471b3efd 3594 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 3595}
3596
1fa57d01
JB		 3597void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3598 struct sk_buff *skb)
f0706e82
JB		 3599{
3600 struct ieee80211_rx_status *rx_status;
f0706e82
JB		 3601 struct ieee80211_mgmt *mgmt;
3602 u16 fc;
1b3a2e49
JB		 3603 struct ieee802_11_elems elems;
3604 int ies_len;
f0706e82 3605
f0706e82
JB		 3606 rx_status = (struct ieee80211_rx_status *) skb->cb;
3607 mgmt = (struct ieee80211_mgmt *) skb->data;
3608 fc = le16_to_cpu(mgmt->frame_control);
3609
8d61ffa5 3610 sdata_lock(sdata);
77fdaa12 3611
66e67e41
JB		 3612 switch (fc & IEEE80211_FCTL_STYPE) {
3613 case IEEE80211_STYPE_BEACON:
8d61ffa5 3614 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
66e67e41
JB		 3615 break;
3616 case IEEE80211_STYPE_PROBE_RESP:
3617 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3618 break;
3619 case IEEE80211_STYPE_AUTH:
8d61ffa5 3620 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
66e67e41
JB		 3621 break;
3622 case IEEE80211_STYPE_DEAUTH:
8d61ffa5 3623 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
66e67e41
JB		 3624 break;
3625 case IEEE80211_STYPE_DISASSOC:
8d61ffa5 3626 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
66e67e41
JB		 3627 break;
3628 case IEEE80211_STYPE_ASSOC_RESP:
3629 case IEEE80211_STYPE_REASSOC_RESP:
8d61ffa5 3630 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
66e67e41
JB		 3631 break;
3632 case IEEE80211_STYPE_ACTION:
37799e52 3633 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
1b3a2e49
JB		 3634 ies_len = skb->len -
3635 offsetof(struct ieee80211_mgmt,
3636 u.action.u.chan_switch.variable);
37799e52
JB		 3637
3638 if (ies_len < 0)
3639 break;
3640
3641 ieee802_11_parse_elems(
3642 mgmt->u.action.u.chan_switch.variable,
b2e506bf 3643 ies_len, true, &elems);
37799e52
JB		 3644
3645 if (elems.parse_error)
3646 break;
3647
1b3a2e49 3648 ieee80211_sta_process_chanswitch(sdata,
2ba45384
LC		 3649 rx_status->mactime,
3650 rx_status->device_timestamp,
3651 &elems, false);
1b3a2e49
JB		 3652 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3653 ies_len = skb->len -
3654 offsetof(struct ieee80211_mgmt,
3655 u.action.u.ext_chan_switch.variable);
3656
3657 if (ies_len < 0)
3658 break;
3659
3660 ieee802_11_parse_elems(
3661 mgmt->u.action.u.ext_chan_switch.variable,
b2e506bf 3662 ies_len, true, &elems);
1b3a2e49
JB		 3663
3664 if (elems.parse_error)
3665 break;
3666
3667 /* for the handling code pretend this was also an IE */
3668 elems.ext_chansw_ie =
3669 &mgmt->u.action.u.ext_chan_switch.data;
3670
66e67e41 3671 ieee80211_sta_process_chanswitch(sdata,
2ba45384
LC		 3672 rx_status->mactime,
3673 rx_status->device_timestamp,
3674 &elems, false);
77fdaa12 3675 }
37799e52 3676 break;
77fdaa12 3677 }
8d61ffa5 3678 sdata_unlock(sdata);
f0706e82
JB		 3679}
3680
9c6bd790 3681static void ieee80211_sta_timer(unsigned long data)
f0706e82 3682{
60f8b39c
JB		 3683 struct ieee80211_sub_if_data *sdata =
3684 (struct ieee80211_sub_if_data *) data;
5bb644a0 3685
9b7d72c1 3686 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
f0706e82
JB		 3687}
3688
04ac3c0e 3689static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
6b684db1 3690 u8 *bssid, u8 reason, bool tx)
04ac3c0e 3691{
6ae16775 3692 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
04ac3c0e 3693
37ad3888 3694 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
6b684db1 3695 tx, frame_buf);
37ad3888 3696
a90faa9d
EG		 3697 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
3698 reason);
04ac3c0e
FF		 3699}
3700
46cad4b7 3701static int ieee80211_auth(struct ieee80211_sub_if_data *sdata)
66e67e41
JB		 3702{
3703 struct ieee80211_local *local = sdata->local;
3704 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3705 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
1672c0e3 3706 u32 tx_flags = 0;
46cad4b7
JB		 3707 u16 trans = 1;
3708 u16 status = 0;
66e67e41 3709
8d61ffa5 3710 sdata_assert_lock(sdata);
66e67e41
JB		 3711
3712 if (WARN_ON_ONCE(!auth_data))
3713 return -EINVAL;
3714
66e67e41
JB		 3715 auth_data->tries++;
3716
3717 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
bdcbd8e0
JB		 3718 sdata_info(sdata, "authentication with %pM timed out\n",
3719 auth_data->bss->bssid);
66e67e41
JB		 3720
3721 /*
3722 * Most likely AP is not in the range so remove the
3723 * bss struct for that AP.
3724 */
3725 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3726
3727 return -ETIMEDOUT;
3728 }
3729
a1845fc7
JB		 3730 drv_mgd_prepare_tx(local, sdata);
3731
46cad4b7
JB		 3732 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3733 auth_data->bss->bssid, auth_data->tries,
3734 IEEE80211_AUTH_MAX_TRIES);
66e67e41 3735
46cad4b7 3736 auth_data->expected_transaction = 2;
6b8ece3a 3737
46cad4b7
JB		 3738 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3739 trans = auth_data->sae_trans;
3740 status = auth_data->sae_status;
3741 auth_data->expected_transaction = trans;
3742 }
66e67e41 3743
46cad4b7
JB		 3744 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
3745 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3746 IEEE80211_TX_INTFL_MLME_CONN_TX;
66e67e41 3747
46cad4b7
JB		 3748 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3749 auth_data->data, auth_data->data_len,
3750 auth_data->bss->bssid,
3751 auth_data->bss->bssid, NULL, 0, 0,
3752 tx_flags);
66e67e41 3753
6211dd12 3754 if (tx_flags == 0) {
1672c0e3 3755 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
cb236d2d 3756 auth_data->timeout_started = true;
8d61ffa5 3757 run_again(sdata, auth_data->timeout);
89afe614 3758 } else {
cb236d2d
JB		 3759 auth_data->timeout =
3760 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3761 auth_data->timeout_started = true;
3762 run_again(sdata, auth_data->timeout);
1672c0e3 3763 }
66e67e41
JB		 3764
3765 return 0;
3766}
3767
3768static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3769{
3770 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3771 struct ieee80211_local *local = sdata->local;
3772
8d61ffa5 3773 sdata_assert_lock(sdata);
66e67e41 3774
66e67e41
JB		 3775 assoc_data->tries++;
3776 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
bdcbd8e0
JB		 3777 sdata_info(sdata, "association with %pM timed out\n",
3778 assoc_data->bss->bssid);
66e67e41
JB		 3779
3780 /*
3781 * Most likely AP is not in the range so remove the
3782 * bss struct for that AP.
3783 */
3784 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3785
3786 return -ETIMEDOUT;
3787 }
3788
bdcbd8e0
JB		 3789 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3790 assoc_data->bss->bssid, assoc_data->tries,
3791 IEEE80211_ASSOC_MAX_TRIES);
66e67e41
JB		 3792 ieee80211_send_assoc(sdata);
3793
30686bf7 3794 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
1672c0e3 3795 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
89afe614 3796 assoc_data->timeout_started = true;
8d61ffa5 3797 run_again(sdata, assoc_data->timeout);
89afe614 3798 } else {
cb236d2d
JB		 3799 assoc_data->timeout =
3800 round_jiffies_up(jiffies +
3801 IEEE80211_ASSOC_TIMEOUT_LONG);
3802 assoc_data->timeout_started = true;
3803 run_again(sdata, assoc_data->timeout);
1672c0e3 3804 }
66e67e41
JB		 3805
3806 return 0;
3807}
3808
1672c0e3
JB		 3809void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3810 __le16 fc, bool acked)
3811{
3812 struct ieee80211_local *local = sdata->local;
3813
3814 sdata->u.mgd.status_fc = fc;
3815 sdata->u.mgd.status_acked = acked;
3816 sdata->u.mgd.status_received = true;
3817
3818 ieee80211_queue_work(&local->hw, &sdata->work);
3819}
3820
1fa57d01 3821void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 3822{
9c6bd790 3823 struct ieee80211_local *local = sdata->local;
1fa57d01 3824 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 3825
8d61ffa5 3826 sdata_lock(sdata);
77fdaa12 3827
1672c0e3
JB		 3828 if (ifmgd->status_received) {
3829 __le16 fc = ifmgd->status_fc;
3830 bool status_acked = ifmgd->status_acked;
3831
3832 ifmgd->status_received = false;
46cad4b7 3833 if (ifmgd->auth_data && ieee80211_is_auth(fc)) {
1672c0e3
JB		 3834 if (status_acked) {
3835 ifmgd->auth_data->timeout =
3836 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
8d61ffa5 3837 run_again(sdata, ifmgd->auth_data->timeout);
1672c0e3
JB		 3838 } else {
3839 ifmgd->auth_data->timeout = jiffies - 1;
3840 }
89afe614 3841 ifmgd->auth_data->timeout_started = true;
1672c0e3
JB		 3842 } else if (ifmgd->assoc_data &&
3843 (ieee80211_is_assoc_req(fc) ||
3844 ieee80211_is_reassoc_req(fc))) {
3845 if (status_acked) {
3846 ifmgd->assoc_data->timeout =
3847 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
8d61ffa5 3848 run_again(sdata, ifmgd->assoc_data->timeout);
1672c0e3
JB		 3849 } else {
3850 ifmgd->assoc_data->timeout = jiffies - 1;
3851 }
89afe614 3852 ifmgd->assoc_data->timeout_started = true;
1672c0e3
JB		 3853 }
3854 }
3855
89afe614 3856 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
66e67e41
JB		 3857 time_after(jiffies, ifmgd->auth_data->timeout)) {
3858 if (ifmgd->auth_data->done) {
3859 /*
3860 * ok ... we waited for assoc but userspace didn't,
3861 * so let's just kill the auth data
3862 */
3863 ieee80211_destroy_auth_data(sdata, false);
46cad4b7 3864 } else if (ieee80211_auth(sdata)) {
66e67e41 3865 u8 bssid[ETH_ALEN];
a9409093
EG		 3866 struct ieee80211_event event = {
3867 .type = MLME_EVENT,
3868 .u.mlme.data = AUTH_EVENT,
3869 .u.mlme.status = MLME_TIMEOUT,
3870 };
66e67e41
JB		 3871
3872 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3873
3874 ieee80211_destroy_auth_data(sdata, false);
3875
6ff57cf8 3876 cfg80211_auth_timeout(sdata->dev, bssid);
a9409093 3877 drv_event_callback(sdata->local, sdata, &event);
66e67e41 3878 }
89afe614 3879 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
8d61ffa5 3880 run_again(sdata, ifmgd->auth_data->timeout);
66e67e41 3881
89afe614 3882 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
66e67e41 3883 time_after(jiffies, ifmgd->assoc_data->timeout)) {
989c6505 3884 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
66e67e41 3885 ieee80211_do_assoc(sdata)) {
959867fa 3886 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
d0d1a12f
EG		 3887 struct ieee80211_event event = {
3888 .type = MLME_EVENT,
3889 .u.mlme.data = ASSOC_EVENT,
3890 .u.mlme.status = MLME_TIMEOUT,
3891 };
66e67e41
JB		 3892
3893 ieee80211_destroy_assoc_data(sdata, false);
959867fa 3894 cfg80211_assoc_timeout(sdata->dev, bss);
d0d1a12f 3895 drv_event_callback(sdata->local, sdata, &event);
66e67e41 3896 }
89afe614 3897 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
8d61ffa5 3898 run_again(sdata, ifmgd->assoc_data->timeout);
66e67e41 3899
392b9ffb 3900 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
b291ba11 3901 ifmgd->associated) {
a43abf29 3902 u8 bssid[ETH_ALEN];
72a8a3ed 3903 int max_tries;
a43abf29 3904
0c1ad2ca 3905 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 3906
30686bf7 3907 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
180205bd 3908 max_tries = max_nullfunc_tries;
72a8a3ed 3909 else
180205bd 3910 max_tries = max_probe_tries;
72a8a3ed 3911
4e5ff376
FF		 3912 /* ACK received for nullfunc probing frame */
3913 if (!ifmgd->probe_send_count)
3914 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 3915 else if (ifmgd->nullfunc_failed) {
3916 if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3917 mlme_dbg(sdata,
3918 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3919 bssid, ifmgd->probe_send_count,
3920 max_tries);
04ac3c0e
FF		 3921 ieee80211_mgd_probe_ap_send(sdata);
3922 } else {
bdcbd8e0
JB		 3923 mlme_dbg(sdata,
3924 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3925 bssid);
95acac61 3926 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1
JB		 3927 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3928 false);
04ac3c0e
FF		 3929 }
3930 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
8d61ffa5 3931 run_again(sdata, ifmgd->probe_timeout);
30686bf7 3932 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
bdcbd8e0
JB		 3933 mlme_dbg(sdata,
3934 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3935 bssid, probe_wait_ms);
95acac61 3936 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 3937 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
04ac3c0e 3938 } else if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3939 mlme_dbg(sdata,
3940 "No probe response from AP %pM after %dms, try %d/%i\n",
3941 bssid, probe_wait_ms,
3942 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 3943 ieee80211_mgd_probe_ap_send(sdata);
3944 } else {
b291ba11
JB		 3945 /*
3946 * We actually lost the connection ... or did we?
3947 * Let's make sure!
3948 */
b38afa87
BG		 3949 wiphy_debug(local->hw.wiphy,
3950 "%s: No probe response from AP %pM"
3951 " after %dms, disconnecting.\n",
3952 sdata->name,
180205bd 3953 bssid, probe_wait_ms);
04ac3c0e 3954
95acac61 3955 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 3956 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
b291ba11
JB		 3957 }
3958 }
3959
8d61ffa5 3960 sdata_unlock(sdata);
f0706e82
JB		 3961}
3962
b291ba11
JB		 3963static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3964{
3965 struct ieee80211_sub_if_data *sdata =
3966 (struct ieee80211_sub_if_data *) data;
0c21e632 3967 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 3968
0c21e632 3969 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
e5593f56
MK		 3970 return;
3971
682bd38b 3972 sdata->u.mgd.connection_loss = false;
1e4dcd01
JO		 3973 ieee80211_queue_work(&sdata->local->hw,
3974 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 3975}
3976
3977static void ieee80211_sta_conn_mon_timer(unsigned long data)
3978{
3979 struct ieee80211_sub_if_data *sdata =
3980 (struct ieee80211_sub_if_data *) data;
3981 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3982 struct ieee80211_local *local = sdata->local;
3983
0c21e632 3984 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
e5593f56
MK		 3985 return;
3986
42935eca 3987 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 3988}
3989
3990static void ieee80211_sta_monitor_work(struct work_struct *work)
3991{
3992 struct ieee80211_sub_if_data *sdata =
3993 container_of(work, struct ieee80211_sub_if_data,
3994 u.mgd.monitor_work);
3995
3996 ieee80211_mgd_probe_ap(sdata, false);
3997}
3998
9c6bd790
JB		 3999static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
4000{
ad935687 4001 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
925e64c3 4002 __ieee80211_stop_poll(sdata);
ad935687 4003
b291ba11 4004 /* let's probe the connection once */
30686bf7 4005 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
494f1fe5
EP		 4006 ieee80211_queue_work(&sdata->local->hw,
4007 &sdata->u.mgd.monitor_work);
ad935687 4008 }
9c6bd790 4009}
f0706e82 4010
b8360ab8 4011#ifdef CONFIG_PM
1a1cb744
JB		 4012void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
4013{
4014 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4015 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4016
4017 sdata_lock(sdata);
4018
c52666ae
EG		 4019 if (ifmgd->auth_data || ifmgd->assoc_data) {
4020 const u8 *bssid = ifmgd->auth_data ?
4021 ifmgd->auth_data->bss->bssid :
4022 ifmgd->assoc_data->bss->bssid;
4023
1a1cb744 4024 /*
c52666ae
EG		 4025 * If we are trying to authenticate / associate while suspending,
4026 * cfg80211 won't know and won't actually abort those attempts,
4027 * thus we need to do that ourselves.
1a1cb744 4028 */
c52666ae 4029 ieee80211_send_deauth_disassoc(sdata, bssid,
1a1cb744
JB		 4030 IEEE80211_STYPE_DEAUTH,
4031 WLAN_REASON_DEAUTH_LEAVING,
4032 false, frame_buf);
c52666ae
EG		 4033 if (ifmgd->assoc_data)
4034 ieee80211_destroy_assoc_data(sdata, false);
4035 if (ifmgd->auth_data)
4036 ieee80211_destroy_auth_data(sdata, false);
1a1cb744
JB		 4037 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4038 IEEE80211_DEAUTH_FRAME_LEN);
4039 }
4040
be72afe0
JB		 4041 /* This is a bit of a hack - we should find a better and more generic
4042 * solution to this. Normally when suspending, cfg80211 will in fact
4043 * deauthenticate. However, it doesn't (and cannot) stop an ongoing
4044 * auth (not so important) or assoc (this is the problem) process.
4045 *
4046 * As a consequence, it can happen that we are in the process of both
4047 * associating and suspending, and receive an association response
4048 * after cfg80211 has checked if it needs to disconnect, but before
4049 * we actually set the flag to drop incoming frames. This will then
4050 * cause the workqueue flush to process the association response in
4051 * the suspend, resulting in a successful association just before it
4052 * tries to remove the interface from the driver, which now though
4053 * has a channel context assigned ... this results in issues.
4054 *
4055 * To work around this (for now) simply deauth here again if we're
4056 * now connected.
4057 */
4058 if (ifmgd->associated && !sdata->local->wowlan) {
4059 u8 bssid[ETH_ALEN];
4060 struct cfg80211_deauth_request req = {
4061 .reason_code = WLAN_REASON_DEAUTH_LEAVING,
4062 .bssid = bssid,
4063 };
4064
4065 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4066 ieee80211_mgd_deauth(sdata, &req);
4067 }
4068
1a1cb744
JB		 4069 sdata_unlock(sdata);
4070}
4071
b8360ab8
JB		 4072void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
4073{
4074 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4075
8d61ffa5 4076 sdata_lock(sdata);
b8360ab8 4077 if (!ifmgd->associated) {
8d61ffa5 4078 sdata_unlock(sdata);
b8360ab8
JB		 4079 return;
4080 }
4081
4082 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
4083 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
4084 mlme_dbg(sdata, "driver requested disconnect after resume\n");
4085 ieee80211_sta_connection_lost(sdata,
4086 ifmgd->associated->bssid,
4087 WLAN_REASON_UNSPECIFIED,
4088 true);
8d61ffa5 4089 sdata_unlock(sdata);
b8360ab8
JB		 4090 return;
4091 }
8d61ffa5 4092 sdata_unlock(sdata);
b8360ab8
JB		 4093}
4094#endif
4095
9c6bd790
JB		 4096/* interface setup */
4097void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 4098{
46900298 4099 struct ieee80211_if_managed *ifmgd;
988c0f72 4100
46900298 4101 ifmgd = &sdata->u.mgd;
b291ba11 4102 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 4103 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 4104 INIT_WORK(&ifmgd->beacon_connection_loss_work,
4105 ieee80211_beacon_connection_loss_work);
882a7c69
JB		 4106 INIT_WORK(&ifmgd->csa_connection_drop_work,
4107 ieee80211_csa_connection_drop_work);
687da132 4108 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
81dd2b88
AN		 4109 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
4110 ieee80211_tdls_peer_del_work);
46900298 4111 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 4112 (unsigned long) sdata);
b291ba11
JB		 4113 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
4114 (unsigned long) sdata);
4115 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
4116 (unsigned long) sdata);
46900298 4117 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 4118 (unsigned long) sdata);
02219b3a
JB		 4119 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
4120 ieee80211_sta_handle_tspec_ac_params_wk);
9c6bd790 4121
ab1faead 4122 ifmgd->flags = 0;
1478acb3 4123 ifmgd->powersave = sdata->wdev.ps;
219c3867
AB		 4124 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
4125 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
67baf663 4126 ifmgd->p2p_noa_index = -1;
bbbdff9e 4127
0d8614b4 4128 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
0f78231b
JB		 4129 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
4130 else
4131 ifmgd->req_smps = IEEE80211_SMPS_OFF;
1277b4a9
LK		 4132
4133 /* Setup TDLS data */
4134 spin_lock_init(&ifmgd->teardown_lock);
4135 ifmgd->teardown_skb = NULL;
4136 ifmgd->orig_teardown_skb = NULL;
f0706e82
JB		 4137}
4138
77fdaa12
JB		 4139/* scan finished notification */
4140void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 4141{
31ee67a1 4142 struct ieee80211_sub_if_data *sdata;
60f8b39c 4143
77fdaa12
JB		 4144 /* Restart STA timers */
4145 rcu_read_lock();
370bd005
BG		 4146 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4147 if (ieee80211_sdata_running(sdata))
4148 ieee80211_restart_sta_timer(sdata);
4149 }
77fdaa12
JB		 4150 rcu_read_unlock();
4151}
60f8b39c 4152
f2d9d270
JB		 4153static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
4154 struct cfg80211_bss *cbss)
4155{
4156 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4157 const u8 *ht_cap_ie, *vht_cap_ie;
4158 const struct ieee80211_ht_cap *ht_cap;
4159 const struct ieee80211_vht_cap *vht_cap;
4160 u8 chains = 1;
4161
4162 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
4163 return chains;
4164
9caf0364 4165 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
f2d9d270
JB		 4166 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
4167 ht_cap = (void *)(ht_cap_ie + 2);
4168 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4169 /*
4170 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4171 * "Tx Unequal Modulation Supported" fields.
4172 */
4173 }
4174
4175 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
4176 return chains;
4177
9caf0364 4178 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
f2d9d270
JB		 4179 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
4180 u8 nss;
4181 u16 tx_mcs_map;
4182
4183 vht_cap = (void *)(vht_cap_ie + 2);
4184 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4185 for (nss = 8; nss > 0; nss--) {
4186 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4187 IEEE80211_VHT_MCS_NOT_SUPPORTED)
4188 break;
4189 }
4190 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4191 chains = max(chains, nss);
4192 }
4193
4194 return chains;
4195}
4196
b17166a7
JB		 4197static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4198 struct cfg80211_bss *cbss)
a1cf775d
JB		 4199{
4200 struct ieee80211_local *local = sdata->local;
4201 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
53b954ee 4202 const struct ieee80211_ht_cap *ht_cap = NULL;
24398e39 4203 const struct ieee80211_ht_operation *ht_oper = NULL;
f2d9d270 4204 const struct ieee80211_vht_operation *vht_oper = NULL;
24398e39 4205 struct ieee80211_supported_band *sband;
4bf88530 4206 struct cfg80211_chan_def chandef;
f2d9d270 4207 int ret;
52a45f38
AN		 4208 u32 i;
4209 bool have_80mhz;
a1cf775d 4210
24398e39
JB		 4211 sband = local->hw.wiphy->bands[cbss->channel->band];
4212
f2d9d270
JB		 4213 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
4214 IEEE80211_STA_DISABLE_80P80MHZ |
4215 IEEE80211_STA_DISABLE_160MHZ);
4216
9caf0364
JB		 4217 rcu_read_lock();
4218
f2d9d270
JB		 4219 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
4220 sband->ht_cap.ht_supported) {
53b954ee 4221 const u8 *ht_oper_ie, *ht_cap_ie;
24398e39 4222
9caf0364 4223 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
24398e39
JB		 4224 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
4225 ht_oper = (void *)(ht_oper_ie + 2);
08e6effa 4226
53b954ee
EP		 4227 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4228 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
4229 ht_cap = (void *)(ht_cap_ie + 2);
4230
4231 if (!ht_cap) {
08e6effa
JB		 4232 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4233 ht_oper = NULL;
4234 }
24398e39
JB		 4235 }
4236
f2d9d270
JB		 4237 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4238 sband->vht_cap.vht_supported) {
08e6effa 4239 const u8 *vht_oper_ie, *vht_cap;
f2d9d270 4240
9caf0364
JB		 4241 vht_oper_ie = ieee80211_bss_get_ie(cbss,
4242 WLAN_EID_VHT_OPERATION);
f2d9d270
JB		 4243 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
4244 vht_oper = (void *)(vht_oper_ie + 2);
4245 if (vht_oper && !ht_oper) {
4246 vht_oper = NULL;
bdcbd8e0 4247 sdata_info(sdata,
f2d9d270 4248 "AP advertised VHT without HT, disabling both\n");
cb145022
JB		 4249 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4250 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
24398e39 4251 }
08e6effa
JB		 4252
4253 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4254 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
4255 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4256 vht_oper = NULL;
4257 }
24398e39
JB		 4258 }
4259
52a45f38
AN		 4260 /* Allow VHT if at least one channel on the sband supports 80 MHz */
4261 have_80mhz = false;
4262 for (i = 0; i < sband->n_channels; i++) {
4263 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
4264 IEEE80211_CHAN_NO_80MHZ))
4265 continue;
4266
4267 have_80mhz = true;
4268 break;
4269 }
4270
4271 if (!have_80mhz)
4272 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4273
f2d9d270
JB		 4274 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
4275 cbss->channel,
53b954ee 4276 ht_cap, ht_oper, vht_oper,
5cdaed1e 4277 &chandef, false);
04ecd257 4278
f2d9d270
JB		 4279 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
4280 local->rx_chains);
24398e39 4281
9caf0364
JB		 4282 rcu_read_unlock();
4283
04ecd257
JB		 4284 /* will change later if needed */
4285 sdata->smps_mode = IEEE80211_SMPS_OFF;
4286
34a3740d 4287 mutex_lock(&local->mtx);
f2d9d270
JB		 4288 /*
4289 * If this fails (possibly due to channel context sharing
4290 * on incompatible channels, e.g. 80+80 and 160 sharing the
4291 * same control channel) try to use a smaller bandwidth.
4292 */
4293 ret = ieee80211_vif_use_channel(sdata, &chandef,
4294 IEEE80211_CHANCTX_SHARED);
0418a445
SW		 4295
4296 /* don't downgrade for 5 and 10 MHz channels, though. */
4297 if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4298 chandef.width == NL80211_CHAN_WIDTH_10)
34a3740d 4299 goto out;
0418a445 4300
d601cd8d 4301 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
e6b7cde4 4302 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
d601cd8d
JB		 4303 ret = ieee80211_vif_use_channel(sdata, &chandef,
4304 IEEE80211_CHANCTX_SHARED);
4305 }
34a3740d
JB		 4306 out:
4307 mutex_unlock(&local->mtx);
f2d9d270 4308 return ret;
b17166a7
JB		 4309}
4310
4311static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
c1041f10
CRI		 4312 struct cfg80211_bss *cbss, bool assoc,
4313 bool override)
b17166a7
JB		 4314{
4315 struct ieee80211_local *local = sdata->local;
4316 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4317 struct ieee80211_bss *bss = (void *)cbss->priv;
4318 struct sta_info *new_sta = NULL;
179b8fc7 4319 struct ieee80211_supported_band *sband;
c1041f10 4320 bool have_sta = false;
b17166a7
JB		 4321 int err;
4322
179b8fc7
CRI		 4323 sband = local->hw.wiphy->bands[cbss->channel->band];
4324
b17166a7
JB		 4325 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
4326 return -EINVAL;
4327
4328 if (assoc) {
4329 rcu_read_lock();
4330 have_sta = sta_info_get(sdata, cbss->bssid);
4331 rcu_read_unlock();
4332 }
4333
4334 if (!have_sta) {
4335 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4336 if (!new_sta)
4337 return -ENOMEM;
4338 }
179b8fc7 4339
c1041f10 4340 if (new_sta || override) {
179b8fc7
CRI		 4341 err = ieee80211_prep_channel(sdata, cbss);
4342 if (err) {
4343 if (new_sta)
4344 sta_info_free(local, new_sta);
4345 return -EINVAL;
4346 }
4347 }
4348
13e0c8e3 4349 if (new_sta) {
5d6a1b06
JB		 4350 u32 rates = 0, basic_rates = 0;
4351 bool have_higher_than_11mbit;
4352 int min_rate = INT_MAX, min_rate_index = -1;
2103dec1 4353 struct ieee80211_chanctx_conf *chanctx_conf;
8cef2c9d 4354 const struct cfg80211_bss_ies *ies;
179b8fc7 4355 int shift = ieee80211_vif_get_shift(&sdata->vif);
2103dec1 4356 u32 rate_flags;
b17166a7 4357
2103dec1
SW		 4358 rcu_read_lock();
4359 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4360 if (WARN_ON(!chanctx_conf)) {
4361 rcu_read_unlock();
c368ddaa 4362 sta_info_free(local, new_sta);
2103dec1
SW		 4363 return -EINVAL;
4364 }
4365 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
4366 rcu_read_unlock();
5d6a1b06 4367
5d6a1b06
JB		 4368 ieee80211_get_rates(sband, bss->supp_rates,
4369 bss->supp_rates_len,
4370 &rates, &basic_rates,
4371 &have_higher_than_11mbit,
2103dec1
SW		 4372 &min_rate, &min_rate_index,
4373 shift, rate_flags);
5d6a1b06
JB		 4374
4375 /*
4376 * This used to be a workaround for basic rates missing
4377 * in the association response frame. Now that we no
4378 * longer use the basic rates from there, it probably
4379 * doesn't happen any more, but keep the workaround so
4380 * in case some *other* APs are buggy in different ways
4381 * we can connect -- with a warning.
4382 */
4383 if (!basic_rates && min_rate_index >= 0) {
bdcbd8e0
JB		 4384 sdata_info(sdata,
4385 "No basic rates, using min rate instead\n");
5d6a1b06
JB		 4386 basic_rates = BIT(min_rate_index);
4387 }
4388
13e0c8e3 4389 new_sta->sta.supp_rates[cbss->channel->band] = rates;
5d6a1b06
JB		 4390 sdata->vif.bss_conf.basic_rates = basic_rates;
4391
4392 /* cf. IEEE 802.11 9.2.12 */
55de908a 4393 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
5d6a1b06
JB		 4394 have_higher_than_11mbit)
4395 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
4396 else
4397 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
4398
4399 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
4400
8c358bcd
JB		 4401 /* set timing information */
4402 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
8cef2c9d 4403 rcu_read_lock();
ef429dad
JB		 4404 ies = rcu_dereference(cbss->beacon_ies);
4405 if (ies) {
4406 const u8 *tim_ie;
4407
4408 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4409 sdata->vif.bss_conf.sync_device_ts =
4410 bss->device_ts_beacon;
4411 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4412 ies->data, ies->len);
4413 if (tim_ie && tim_ie[1] >= 2)
4414 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
4415 else
4416 sdata->vif.bss_conf.sync_dtim_count = 0;
30686bf7
JB		 4417 } else if (!ieee80211_hw_check(&sdata->local->hw,
4418 TIMING_BEACON_ONLY)) {
ef429dad
JB		 4419 ies = rcu_dereference(cbss->proberesp_ies);
4420 /* must be non-NULL since beacon IEs were NULL */
4421 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4422 sdata->vif.bss_conf.sync_device_ts =
4423 bss->device_ts_presp;
4424 sdata->vif.bss_conf.sync_dtim_count = 0;
4425 } else {
4426 sdata->vif.bss_conf.sync_tsf = 0;
4427 sdata->vif.bss_conf.sync_device_ts = 0;
4428 sdata->vif.bss_conf.sync_dtim_count = 0;
4429 }
8cef2c9d 4430 rcu_read_unlock();
8c358bcd
JB		 4431
4432 /* tell driver about BSSID, basic rates and timing */
5d6a1b06 4433 ieee80211_bss_info_change_notify(sdata,
8c358bcd
JB		 4434 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4435 BSS_CHANGED_BEACON_INT);
a1cf775d
JB		 4436
4437 if (assoc)
13e0c8e3 4438 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
a1cf775d 4439
13e0c8e3
JB		 4440 err = sta_info_insert(new_sta);
4441 new_sta = NULL;
a1cf775d 4442 if (err) {
bdcbd8e0
JB		 4443 sdata_info(sdata,
4444 "failed to insert STA entry for the AP (error %d)\n",
4445 err);
a1cf775d
JB		 4446 return err;
4447 }
4448 } else
b203ca39 4449 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
a1cf775d 4450
7d830a19
DS		 4451 /* Cancel scan to ensure that nothing interferes with connection */
4452 if (local->scanning)
4453 ieee80211_scan_cancel(local);
4454
a1cf775d
JB		 4455 return 0;
4456}
4457
77fdaa12
JB		 4458/* config hooks */
4459int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4460 struct cfg80211_auth_request *req)
9c6bd790 4461{
66e67e41
JB		 4462 struct ieee80211_local *local = sdata->local;
4463 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4464 struct ieee80211_mgd_auth_data *auth_data;
77fdaa12 4465 u16 auth_alg;
66e67e41
JB		 4466 int err;
4467
4468 /* prepare auth data structure */
9c6bd790 4469
77fdaa12
JB		 4470 switch (req->auth_type) {
4471 case NL80211_AUTHTYPE_OPEN_SYSTEM:
4472 auth_alg = WLAN_AUTH_OPEN;
4473 break;
4474 case NL80211_AUTHTYPE_SHARED_KEY:
66e67e41 4475 if (IS_ERR(local->wep_tx_tfm))
9dca9c49 4476 return -EOPNOTSUPP;
77fdaa12
JB		 4477 auth_alg = WLAN_AUTH_SHARED_KEY;
4478 break;
4479 case NL80211_AUTHTYPE_FT:
4480 auth_alg = WLAN_AUTH_FT;
4481 break;
4482 case NL80211_AUTHTYPE_NETWORK_EAP:
4483 auth_alg = WLAN_AUTH_LEAP;
4484 break;
6b8ece3a
JM		 4485 case NL80211_AUTHTYPE_SAE:
4486 auth_alg = WLAN_AUTH_SAE;
4487 break;
77fdaa12
JB		 4488 default:
4489 return -EOPNOTSUPP;
60f8b39c 4490 }
77fdaa12 4491
6b8ece3a
JM		 4492 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
4493 req->ie_len, GFP_KERNEL);
66e67e41 4494 if (!auth_data)
9c6bd790 4495 return -ENOMEM;
77fdaa12 4496
66e67e41 4497 auth_data->bss = req->bss;
77fdaa12 4498
6b8ece3a
JM		 4499 if (req->sae_data_len >= 4) {
4500 __le16 *pos = (__le16 *) req->sae_data;
4501 auth_data->sae_trans = le16_to_cpu(pos[0]);
4502 auth_data->sae_status = le16_to_cpu(pos[1]);
4503 memcpy(auth_data->data, req->sae_data + 4,
4504 req->sae_data_len - 4);
4505 auth_data->data_len += req->sae_data_len - 4;
4506 }
4507
77fdaa12 4508 if (req->ie && req->ie_len) {
6b8ece3a
JM		 4509 memcpy(&auth_data->data[auth_data->data_len],
4510 req->ie, req->ie_len);
4511 auth_data->data_len += req->ie_len;
9c6bd790 4512 }
77fdaa12 4513
fffd0934 4514 if (req->key && req->key_len) {
66e67e41
JB		 4515 auth_data->key_len = req->key_len;
4516 auth_data->key_idx = req->key_idx;
4517 memcpy(auth_data->key, req->key, req->key_len);
fffd0934
JB		 4518 }
4519
66e67e41 4520 auth_data->algorithm = auth_alg;
60f8b39c 4521
66e67e41 4522 /* try to authenticate/probe */
2a33bee2 4523
66e67e41
JB		 4524 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4525 ifmgd->assoc_data) {
4526 err = -EBUSY;
4527 goto err_free;
2a33bee2
GE		 4528 }
4529
66e67e41
JB		 4530 if (ifmgd->auth_data)
4531 ieee80211_destroy_auth_data(sdata, false);
2a33bee2 4532
66e67e41
JB		 4533 /* prep auth_data so we don't go into idle on disassoc */
4534 ifmgd->auth_data = auth_data;
af6b6374 4535
7b119dc0
JB		 4536 if (ifmgd->associated) {
4537 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4538
4539 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4540 WLAN_REASON_UNSPECIFIED,
4541 false, frame_buf);
4542
a90faa9d
EG		 4543 ieee80211_report_disconnect(sdata, frame_buf,
4544 sizeof(frame_buf), true,
4545 WLAN_REASON_UNSPECIFIED);
7b119dc0 4546 }
af6b6374 4547
bdcbd8e0 4548 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
e5b900d2 4549
c1041f10 4550 err = ieee80211_prep_connection(sdata, req->bss, false, false);
a1cf775d 4551 if (err)
66e67e41 4552 goto err_clear;
af6b6374 4553
46cad4b7 4554 err = ieee80211_auth(sdata);
66e67e41 4555 if (err) {
66e67e41
JB		 4556 sta_info_destroy_addr(sdata, req->bss->bssid);
4557 goto err_clear;
4558 }
4559
4560 /* hold our own reference */
5b112d3d 4561 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
8d61ffa5 4562 return 0;
66e67e41
JB		 4563
4564 err_clear:
c84a67a2 4565 eth_zero_addr(ifmgd->bssid);
3d2abdfd 4566 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41 4567 ifmgd->auth_data = NULL;
d01f858c
MK		 4568 mutex_lock(&sdata->local->mtx);
4569 ieee80211_vif_release_channel(sdata);
4570 mutex_unlock(&sdata->local->mtx);
66e67e41
JB		 4571 err_free:
4572 kfree(auth_data);
66e67e41 4573 return err;
af6b6374
JB		 4574}
4575
77fdaa12
JB		 4576int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4577 struct cfg80211_assoc_request *req)
f0706e82 4578{
66e67e41 4579 struct ieee80211_local *local = sdata->local;
77fdaa12 4580 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 4581 struct ieee80211_bss *bss = (void *)req->bss->priv;
66e67e41 4582 struct ieee80211_mgd_assoc_data *assoc_data;
c65dd147 4583 const struct cfg80211_bss_ies *beacon_ies;
4e74bfdb 4584 struct ieee80211_supported_band *sband;
b08fbbd8 4585 const u8 *ssidie, *ht_ie, *vht_ie;
2a33bee2 4586 int i, err;
c1041f10 4587 bool override = false;
f0706e82 4588
66e67e41
JB		 4589 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4590 if (!assoc_data)
4591 return -ENOMEM;
4592
9caf0364
JB		 4593 rcu_read_lock();
4594 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4595 if (!ssidie) {
4596 rcu_read_unlock();
4597 kfree(assoc_data);
4598 return -EINVAL;
4599 }
4600 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4601 assoc_data->ssid_len = ssidie[1];
4602 rcu_read_unlock();
4603
7b119dc0
JB		 4604 if (ifmgd->associated) {
4605 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4606
4607 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4608 WLAN_REASON_UNSPECIFIED,
4609 false, frame_buf);
4610
a90faa9d
EG		 4611 ieee80211_report_disconnect(sdata, frame_buf,
4612 sizeof(frame_buf), true,
4613 WLAN_REASON_UNSPECIFIED);
7b119dc0 4614 }
66e67e41
JB		 4615
4616 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4617 err = -EBUSY;
4618 goto err_free;
af6b6374 4619 }
77fdaa12 4620
66e67e41
JB		 4621 if (ifmgd->assoc_data) {
4622 err = -EBUSY;
4623 goto err_free;
4624 }
77fdaa12 4625
66e67e41
JB		 4626 if (ifmgd->auth_data) {
4627 bool match;
4628
4629 /* keep sta info, bssid if matching */
b203ca39 4630 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
66e67e41 4631 ieee80211_destroy_auth_data(sdata, match);
2a33bee2
GE		 4632 }
4633
66e67e41 4634 /* prepare assoc data */
095d81ce 4635
d8ec4433
JO		 4636 ifmgd->beacon_crc_valid = false;
4637
095d81ce
JB		 4638 assoc_data->wmm = bss->wmm_used &&
4639 (local->hw.queues >= IEEE80211_NUM_ACS);
095d81ce 4640
de5036aa
JB		 4641 /*
4642 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4643 * We still associate in non-HT mode (11a/b/g) if any one of these
4644 * ciphers is configured as pairwise.
4645 * We can set this to true for non-11n hardware, that'll be checked
4646 * separately along with the peer capabilities.
4647 */
1c4cb928 4648 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
77fdaa12
JB		 4649 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4650 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
1c4cb928 4651 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
a8243b72 4652 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
d545daba 4653 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
1c4cb928 4654 netdev_info(sdata->dev,
d545daba 4655 "disabling HT/VHT due to WEP/TKIP use\n");
1c4cb928
JB		 4656 }
4657 }
77fdaa12 4658
4e74bfdb
JB		 4659 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4660 sband = local->hw.wiphy->bands[req->bss->channel->band];
4661 if (!sband->ht_cap.ht_supported ||
095d81ce
JB		 4662 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4663 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
a8243b72 4664 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
095d81ce
JB		 4665 if (!bss->wmm_used &&
4666 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
1b49de26
JB		 4667 netdev_info(sdata->dev,
4668 "disabling HT as WMM/QoS is not supported by the AP\n");
1c4cb928 4669 }
4e74bfdb 4670
d545daba
MP		 4671 /* disable VHT if we don't support it or the AP doesn't use WMM */
4672 if (!sband->vht_cap.vht_supported ||
095d81ce
JB		 4673 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4674 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
d545daba 4675 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
095d81ce
JB		 4676 if (!bss->wmm_used &&
4677 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
1b49de26
JB		 4678 netdev_info(sdata->dev,
4679 "disabling VHT as WMM/QoS is not supported by the AP\n");
d545daba
MP		 4680 }
4681
ef96a842
BG		 4682 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4683 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4684 sizeof(ifmgd->ht_capa_mask));
4685
dd5ecfea
JB		 4686 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4687 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4688 sizeof(ifmgd->vht_capa_mask));
4689
77fdaa12 4690 if (req->ie && req->ie_len) {
66e67e41
JB		 4691 memcpy(assoc_data->ie, req->ie, req->ie_len);
4692 assoc_data->ie_len = req->ie_len;
4693 }
f679f65d 4694
66e67e41 4695 assoc_data->bss = req->bss;
f679f65d 4696
af6b6374
JB		 4697 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4698 if (ifmgd->powersave)
04ecd257 4699 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
af6b6374 4700 else
04ecd257 4701 sdata->smps_mode = IEEE80211_SMPS_OFF;
af6b6374 4702 } else
04ecd257 4703 sdata->smps_mode = ifmgd->req_smps;
af6b6374 4704
66e67e41 4705 assoc_data->capability = req->bss->capability;
66e67e41
JB		 4706 assoc_data->supp_rates = bss->supp_rates;
4707 assoc_data->supp_rates_len = bss->supp_rates_len;
9dde6423 4708
9caf0364 4709 rcu_read_lock();
9dde6423
JB		 4710 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4711 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4712 assoc_data->ap_ht_param =
4713 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4714 else
a8243b72 4715 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
b08fbbd8
JB		 4716 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4717 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4718 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4719 sizeof(struct ieee80211_vht_cap));
4720 else
4721 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
9caf0364 4722 rcu_read_unlock();
63f170e0 4723
848955cc 4724 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
30686bf7 4725 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK),
848955cc
JB		 4726 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
4727 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
4728
ab13315a 4729 if (bss->wmm_used && bss->uapsd_supported &&
848955cc 4730 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
76f0303d 4731 assoc_data->uapsd = true;
ab13315a
KV		 4732 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4733 } else {
76f0303d 4734 assoc_data->uapsd = false;
ab13315a
KV		 4735 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4736 }
4737
77fdaa12 4738 if (req->prev_bssid)
66e67e41 4739 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12
JB		 4740
4741 if (req->use_mfp) {
4742 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4743 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4744 } else {
4745 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4746 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4747 }
4748
cd2f5dd7
AK		 4749 if (req->flags & ASSOC_REQ_USE_RRM)
4750 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
4751 else
4752 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
4753
77fdaa12
JB		 4754 if (req->crypto.control_port)
4755 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4756 else
4757 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4758
a621fa4d
JB		 4759 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4760 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
2475b1cc
MS		 4761 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
4762 sdata->vif.type);
a621fa4d 4763
66e67e41
JB		 4764 /* kick off associate process */
4765
4766 ifmgd->assoc_data = assoc_data;
826262c3 4767 ifmgd->dtim_period = 0;
989c6505 4768 ifmgd->have_beacon = false;
66e67e41 4769
c1041f10
CRI		 4770 /* override HT/VHT configuration only if the AP and we support it */
4771 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
4772 struct ieee80211_sta_ht_cap sta_ht_cap;
4773
4774 if (req->flags & ASSOC_REQ_DISABLE_HT)
4775 override = true;
4776
4777 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
4778 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
4779
4780 /* check for 40 MHz disable override */
4781 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) &&
4782 sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
4783 !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
4784 override = true;
4785
4786 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4787 req->flags & ASSOC_REQ_DISABLE_VHT)
4788 override = true;
4789 }
4790
4791 if (req->flags & ASSOC_REQ_DISABLE_HT) {
4792 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4793 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4794 }
4795
4796 if (req->flags & ASSOC_REQ_DISABLE_VHT)
4797 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4798
4799 err = ieee80211_prep_connection(sdata, req->bss, true, override);
a1cf775d
JB		 4800 if (err)
4801 goto err_clear;
66e67e41 4802
c65dd147
EG		 4803 rcu_read_lock();
4804 beacon_ies = rcu_dereference(req->bss->beacon_ies);
826262c3 4805
30686bf7 4806 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) &&
c65dd147
EG		 4807 !beacon_ies) {
4808 /*
4809 * Wait up to one beacon interval ...
4810 * should this be more if we miss one?
4811 */
4812 sdata_info(sdata, "waiting for beacon from %pM\n",
4813 ifmgd->bssid);
4814 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
89afe614 4815 assoc_data->timeout_started = true;
c65dd147
EG		 4816 assoc_data->need_beacon = true;
4817 } else if (beacon_ies) {
4818 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4819 beacon_ies->data,
4820 beacon_ies->len);
ef429dad
JB		 4821 u8 dtim_count = 0;
4822
c65dd147
EG		 4823 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4824 const struct ieee80211_tim_ie *tim;
4825 tim = (void *)(tim_ie + 2);
4826 ifmgd->dtim_period = tim->dtim_period;
ef429dad 4827 dtim_count = tim->dtim_count;
826262c3 4828 }
989c6505 4829 ifmgd->have_beacon = true;
66e67e41 4830 assoc_data->timeout = jiffies;
89afe614 4831 assoc_data->timeout_started = true;
ef429dad 4832
30686bf7 4833 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
ef429dad
JB		 4834 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4835 sdata->vif.bss_conf.sync_device_ts =
4836 bss->device_ts_beacon;
4837 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4838 }
c65dd147
EG		 4839 } else {
4840 assoc_data->timeout = jiffies;
89afe614 4841 assoc_data->timeout_started = true;
66e67e41 4842 }
c65dd147
EG		 4843 rcu_read_unlock();
4844
8d61ffa5 4845 run_again(sdata, assoc_data->timeout);
66e67e41 4846
fcff4f10
PS		 4847 if (bss->corrupt_data) {
4848 char *corrupt_type = "data";
4849 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4850 if (bss->corrupt_data &
4851 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4852 corrupt_type = "beacon and probe response";
4853 else
4854 corrupt_type = "beacon";
4855 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4856 corrupt_type = "probe response";
bdcbd8e0
JB		 4857 sdata_info(sdata, "associating with AP with corrupt %s\n",
4858 corrupt_type);
fcff4f10
PS		 4859 }
4860
8d61ffa5 4861 return 0;
66e67e41 4862 err_clear:
c84a67a2 4863 eth_zero_addr(ifmgd->bssid);
3d2abdfd 4864 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 4865 ifmgd->assoc_data = NULL;
4866 err_free:
4867 kfree(assoc_data);
66e67e41 4868 return err;
f0706e82
JB		 4869}
4870
77fdaa12 4871int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
63c9c5e7 4872 struct cfg80211_deauth_request *req)
f0706e82 4873{
46900298 4874 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 4875 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
6863255b 4876 bool tx = !req->local_state_change;
f0706e82 4877
c9c3a060
JB		 4878 if (ifmgd->auth_data &&
4879 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
4880 sdata_info(sdata,
4881 "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
4882 req->bssid, req->reason_code,
4883 ieee80211_get_reason_code_string(req->reason_code));
0ff71613 4884
8c7d857c 4885 drv_mgd_prepare_tx(sdata->local, sdata);
37ad3888
JB		 4886 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4887 IEEE80211_STYPE_DEAUTH,
6863255b 4888 req->reason_code, tx,
37ad3888 4889 frame_buf);
86552017 4890 ieee80211_destroy_auth_data(sdata, false);
a90faa9d
EG		 4891 ieee80211_report_disconnect(sdata, frame_buf,
4892 sizeof(frame_buf), true,
4893 req->reason_code);
86552017 4894
c9c3a060 4895 return 0;
8c7d857c
EG		 4896 }
4897
a64cba3c
AO		 4898 if (ifmgd->assoc_data &&
4899 ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) {
4900 sdata_info(sdata,
4901 "aborting association with %pM by local choice (Reason: %u=%s)\n",
4902 req->bssid, req->reason_code,
4903 ieee80211_get_reason_code_string(req->reason_code));
4904
4905 drv_mgd_prepare_tx(sdata->local, sdata);
4906 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4907 IEEE80211_STYPE_DEAUTH,
4908 req->reason_code, tx,
4909 frame_buf);
4910 ieee80211_destroy_assoc_data(sdata, false);
4911 ieee80211_report_disconnect(sdata, frame_buf,
4912 sizeof(frame_buf), true,
4913 req->reason_code);
4914 return 0;
4915 }
4916
86552017
JB		 4917 if (ifmgd->associated &&
4918 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
c9c3a060
JB		 4919 sdata_info(sdata,
4920 "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
4921 req->bssid, req->reason_code,
4922 ieee80211_get_reason_code_string(req->reason_code));
4923
86552017
JB		 4924 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4925 req->reason_code, tx, frame_buf);
a90faa9d
EG		 4926 ieee80211_report_disconnect(sdata, frame_buf,
4927 sizeof(frame_buf), true,
4928 req->reason_code);
c9c3a060
JB		 4929 return 0;
4930 }
86552017 4931
c9c3a060 4932 return -ENOTCONN;
f0706e82 4933}
84363e6e 4934
77fdaa12 4935int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 4936 struct cfg80211_disassoc_request *req)
9c6bd790 4937{
77fdaa12 4938 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 4939 u8 bssid[ETH_ALEN];
6ae16775 4940 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
9c6bd790 4941
8d8b261a
JB		 4942 /*
4943 * cfg80211 should catch this ... but it's racy since
4944 * we can receive a disassoc frame, process it, hand it
4945 * to cfg80211 while that's in a locked section already
4946 * trying to tell us that the user wants to disconnect.
4947 */
8d61ffa5 4948 if (ifmgd->associated != req->bss)
77fdaa12 4949 return -ENOLINK;
77fdaa12 4950
bdcbd8e0 4951 sdata_info(sdata,
dfa1ad29
CO		 4952 "disassociating from %pM by local choice (Reason: %u=%s)\n",
4953 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
0ff71613 4954
e69e95db 4955 memcpy(bssid, req->bss->bssid, ETH_ALEN);
37ad3888
JB		 4956 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4957 req->reason_code, !req->local_state_change,
4958 frame_buf);
10f644a4 4959
a90faa9d
EG		 4960 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
4961 req->reason_code);
bc83b681 4962
10f644a4
JB		 4963 return 0;
4964}
026331c4 4965
afa762f6 4966void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
54e4ffb2
JB		 4967{
4968 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4969
49921859
BG		 4970 /*
4971 * Make sure some work items will not run after this,
4972 * they will not do anything but might not have been
4973 * cancelled when disconnecting.
4974 */
4975 cancel_work_sync(&ifmgd->monitor_work);
4976 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
4977 cancel_work_sync(&ifmgd->request_smps_work);
4978 cancel_work_sync(&ifmgd->csa_connection_drop_work);
4979 cancel_work_sync(&ifmgd->chswitch_work);
81dd2b88 4980 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
49921859 4981
8d61ffa5 4982 sdata_lock(sdata);
959867fa
JB		 4983 if (ifmgd->assoc_data) {
4984 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
54e4ffb2 4985 ieee80211_destroy_assoc_data(sdata, false);
959867fa
JB		 4986 cfg80211_assoc_timeout(sdata->dev, bss);
4987 }
54e4ffb2
JB		 4988 if (ifmgd->auth_data)
4989 ieee80211_destroy_auth_data(sdata, false);
1277b4a9
LK		 4990 spin_lock_bh(&ifmgd->teardown_lock);
4991 if (ifmgd->teardown_skb) {
4992 kfree_skb(ifmgd->teardown_skb);
4993 ifmgd->teardown_skb = NULL;
4994 ifmgd->orig_teardown_skb = NULL;
4995 }
4996 spin_unlock_bh(&ifmgd->teardown_lock);
54e4ffb2 4997 del_timer_sync(&ifmgd->timer);
8d61ffa5 4998 sdata_unlock(sdata);
54e4ffb2
JB		 4999}
5000
a97c13c3
JO		 5001void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
5002 enum nl80211_cqm_rssi_threshold_event rssi_event,
5003 gfp_t gfp)
5004{
5005 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5006
b5878a2d
JB		 5007 trace_api_cqm_rssi_notify(sdata, rssi_event);
5008
a97c13c3
JO		 5009 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
5010}
5011EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
98f03342
JB		 5012
5013void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
5014{
5015 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5016
5017 trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
5018
5019 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
5020}
5021EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);
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