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mac80211: remove sta->last_ack_signal
[deliverable/linux.git] / net / mac80211 / mlme.c
CommitLineData
f0706e82
JB		 1/*
2 * BSS client mode implementation
5394af4d 3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
f0706e82
JB		 4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
d98ad83e 8 * Copyright 2013-2014 Intel Mobile Communications GmbH
322cd406 9 * Copyright (C) 2015 Intel Deutschland GmbH
f0706e82
JB		 10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License version 2 as
13 * published by the Free Software Foundation.
14 */
15
5b323edb 16#include <linux/delay.h>
f0706e82
JB		 17#include <linux/if_ether.h>
18#include <linux/skbuff.h>
f0706e82 19#include <linux/if_arp.h>
f0706e82 20#include <linux/etherdevice.h>
d9b93842 21#include <linux/moduleparam.h>
d0709a65 22#include <linux/rtnetlink.h>
d91f36db 23#include <linux/crc32.h>
5a0e3ad6 24#include <linux/slab.h>
bc3b2d7f 25#include <linux/export.h>
f0706e82 26#include <net/mac80211.h>
472dbc45 27#include <asm/unaligned.h>
60f8b39c 28
f0706e82 29#include "ieee80211_i.h"
24487981 30#include "driver-ops.h"
2c8dccc7
JB		 31#include "rate.h"
32#include "led.h"
f0706e82 33
1672c0e3 34#define IEEE80211_AUTH_TIMEOUT (HZ / 5)
cb236d2d 35#define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2)
1672c0e3
JB		 36#define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10)
37#define IEEE80211_AUTH_MAX_TRIES 3
38#define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
39#define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
cb236d2d 40#define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2)
1672c0e3
JB		 41#define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10)
42#define IEEE80211_ASSOC_MAX_TRIES 3
66e67e41 43
180205bd
BG		 44static int max_nullfunc_tries = 2;
45module_param(max_nullfunc_tries, int, 0644);
46MODULE_PARM_DESC(max_nullfunc_tries,
47 "Maximum nullfunc tx tries before disconnecting (reason 4).");
48
49static int max_probe_tries = 5;
50module_param(max_probe_tries, int, 0644);
51MODULE_PARM_DESC(max_probe_tries,
52 "Maximum probe tries before disconnecting (reason 4).");
b291ba11
JB		 53
54/*
7ccc8bd7
FF		 55 * Beacon loss timeout is calculated as N frames times the
56 * advertised beacon interval. This may need to be somewhat
57 * higher than what hardware might detect to account for
58 * delays in the host processing frames. But since we also
59 * probe on beacon miss before declaring the connection lost
60 * default to what we want.
b291ba11 61 */
59c1ec2b
BG		 62static int beacon_loss_count = 7;
63module_param(beacon_loss_count, int, 0644);
64MODULE_PARM_DESC(beacon_loss_count,
65 "Number of beacon intervals before we decide beacon was lost.");
7ccc8bd7 66
b291ba11
JB		 67/*
68 * Time the connection can be idle before we probe
69 * it to see if we can still talk to the AP.
70 */
d1c5091f 71#define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
b291ba11
JB		 72/*
73 * Time we wait for a probe response after sending
74 * a probe request because of beacon loss or for
75 * checking the connection still works.
76 */
180205bd
BG		 77static int probe_wait_ms = 500;
78module_param(probe_wait_ms, int, 0644);
79MODULE_PARM_DESC(probe_wait_ms,
80 "Maximum time(ms) to wait for probe response"
81 " before disconnecting (reason 4).");
f0706e82 82
391a200a
JM		 83/*
84 * How many Beacon frames need to have been used in average signal strength
85 * before starting to indicate signal change events.
86 */
87#define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
88
ca386f31
JB		 89/*
90 * We can have multiple work items (and connection probing)
91 * scheduling this timer, but we need to take care to only
92 * reschedule it when it should fire _earlier_ than it was
93 * asked for before, or if it's not pending right now. This
94 * function ensures that. Note that it then is required to
95 * run this function for all timeouts after the first one
96 * has happened -- the work that runs from this timer will
97 * do that.
98 */
8d61ffa5
JB		 99static void run_again(struct ieee80211_sub_if_data *sdata,
100 unsigned long timeout)
ca386f31 101{
8d61ffa5 102 sdata_assert_lock(sdata);
ca386f31 103
8d61ffa5
JB		 104 if (!timer_pending(&sdata->u.mgd.timer) ||
105 time_before(timeout, sdata->u.mgd.timer.expires))
106 mod_timer(&sdata->u.mgd.timer, timeout);
ca386f31
JB		 107}
108
d3a910a8 109void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
b291ba11 110{
c1288b12 111 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
b291ba11
JB		 112 return;
113
30686bf7 114 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
7eeff74c
JB		 115 return;
116
b291ba11 117 mod_timer(&sdata->u.mgd.bcn_mon_timer,
7ccc8bd7 118 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
b291ba11
JB		 119}
120
be099e82
LR		 121void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
122{
0c699c3a
LR		 123 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
124
8628172f
SG		 125 if (unlikely(!sdata->u.mgd.associated))
126 return;
127
448cd2e2
EP		 128 ifmgd->probe_send_count = 0;
129
30686bf7 130 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
be099e82
LR		 131 return;
132
133 mod_timer(&sdata->u.mgd.conn_mon_timer,
134 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
135}
136
5484e237 137static int ecw2cw(int ecw)
60f8b39c 138{
5484e237 139 return (1 << ecw) - 1;
60f8b39c
JB		 140}
141
6565ec9b
JB		 142static u32
143ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
144 struct ieee80211_supported_band *sband,
145 struct ieee80211_channel *channel,
53b954ee 146 const struct ieee80211_ht_cap *ht_cap,
6565ec9b
JB		 147 const struct ieee80211_ht_operation *ht_oper,
148 const struct ieee80211_vht_operation *vht_oper,
5cdaed1e 149 struct cfg80211_chan_def *chandef, bool tracking)
6565ec9b 150{
5cdaed1e 151 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6565ec9b 152 struct cfg80211_chan_def vht_chandef;
179b8fc7 153 struct ieee80211_sta_ht_cap sta_ht_cap;
6565ec9b
JB		 154 u32 ht_cfreq, ret;
155
179b8fc7
CRI		 156 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
157 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
158
6565ec9b
JB		 159 chandef->chan = channel;
160 chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
161 chandef->center_freq1 = channel->center_freq;
162 chandef->center_freq2 = 0;
163
179b8fc7 164 if (!ht_cap || !ht_oper || !sta_ht_cap.ht_supported) {
6565ec9b
JB		 165 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
166 goto out;
167 }
168
169 chandef->width = NL80211_CHAN_WIDTH_20;
170
53b954ee
EP		 171 if (!(ht_cap->cap_info &
172 cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40))) {
f3000e1b 173 ret = IEEE80211_STA_DISABLE_40MHZ;
7e6225a1 174 vht_chandef = *chandef;
53b954ee
EP		 175 goto out;
176 }
177
6565ec9b
JB		 178 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
179 channel->band);
180 /* check that channel matches the right operating channel */
5cdaed1e 181 if (!tracking && channel->center_freq != ht_cfreq) {
6565ec9b
JB		 182 /*
183 * It's possible that some APs are confused here;
184 * Netgear WNDR3700 sometimes reports 4 higher than
185 * the actual channel in association responses, but
186 * since we look at probe response/beacon data here
187 * it should be OK.
188 */
5cdaed1e
JB		 189 sdata_info(sdata,
190 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
191 channel->center_freq, ht_cfreq,
192 ht_oper->primary_chan, channel->band);
6565ec9b
JB		 193 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
194 goto out;
195 }
196
197 /* check 40 MHz support, if we have it */
179b8fc7 198 if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
6565ec9b
JB		 199 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
200 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
201 chandef->width = NL80211_CHAN_WIDTH_40;
202 chandef->center_freq1 += 10;
203 break;
204 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
205 chandef->width = NL80211_CHAN_WIDTH_40;
206 chandef->center_freq1 -= 10;
207 break;
208 }
209 } else {
210 /* 40 MHz (and 80 MHz) must be supported for VHT */
211 ret = IEEE80211_STA_DISABLE_VHT;
85220d71
JB		 212 /* also mark 40 MHz disabled */
213 ret |= IEEE80211_STA_DISABLE_40MHZ;
6565ec9b
JB		 214 goto out;
215 }
216
217 if (!vht_oper || !sband->vht_cap.vht_supported) {
218 ret = IEEE80211_STA_DISABLE_VHT;
219 goto out;
220 }
221
222 vht_chandef.chan = channel;
223 vht_chandef.center_freq1 =
224 ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx,
225 channel->band);
226 vht_chandef.center_freq2 = 0;
227
6565ec9b
JB		 228 switch (vht_oper->chan_width) {
229 case IEEE80211_VHT_CHANWIDTH_USE_HT:
230 vht_chandef.width = chandef->width;
cb664981 231 vht_chandef.center_freq1 = chandef->center_freq1;
6565ec9b
JB		 232 break;
233 case IEEE80211_VHT_CHANWIDTH_80MHZ:
234 vht_chandef.width = NL80211_CHAN_WIDTH_80;
235 break;
236 case IEEE80211_VHT_CHANWIDTH_160MHZ:
237 vht_chandef.width = NL80211_CHAN_WIDTH_160;
238 break;
239 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
240 vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
6553bf04
JB		 241 vht_chandef.center_freq2 =
242 ieee80211_channel_to_frequency(
243 vht_oper->center_freq_seg2_idx,
244 channel->band);
6565ec9b
JB		 245 break;
246 default:
5cdaed1e 247 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
30eb1dc2
JB		 248 sdata_info(sdata,
249 "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
250 vht_oper->chan_width);
6565ec9b
JB		 251 ret = IEEE80211_STA_DISABLE_VHT;
252 goto out;
253 }
254
255 if (!cfg80211_chandef_valid(&vht_chandef)) {
5cdaed1e 256 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
30eb1dc2
JB		 257 sdata_info(sdata,
258 "AP VHT information is invalid, disable VHT\n");
6565ec9b
JB		 259 ret = IEEE80211_STA_DISABLE_VHT;
260 goto out;
261 }
262
263 if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
264 ret = 0;
265 goto out;
266 }
267
268 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
5cdaed1e 269 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
30eb1dc2
JB		 270 sdata_info(sdata,
271 "AP VHT information doesn't match HT, disable VHT\n");
6565ec9b
JB		 272 ret = IEEE80211_STA_DISABLE_VHT;
273 goto out;
274 }
275
276 *chandef = vht_chandef;
277
278 ret = 0;
279
280out:
963a1852
JB		 281 /*
282 * When tracking the current AP, don't do any further checks if the
283 * new chandef is identical to the one we're currently using for the
284 * connection. This keeps us from playing ping-pong with regulatory,
285 * without it the following can happen (for example):
286 * - connect to an AP with 80 MHz, world regdom allows 80 MHz
287 * - AP advertises regdom US
288 * - CRDA loads regdom US with 80 MHz prohibited (old database)
289 * - the code below detects an unsupported channel, downgrades, and
290 * we disconnect from the AP in the caller
291 * - disconnect causes CRDA to reload world regdomain and the game
292 * starts anew.
293 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
294 *
295 * It seems possible that there are still scenarios with CSA or real
296 * bandwidth changes where a this could happen, but those cases are
297 * less common and wouldn't completely prevent using the AP.
298 */
299 if (tracking &&
300 cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef))
301 return ret;
302
586e01ed
JB		 303 /* don't print the message below for VHT mismatch if VHT is disabled */
304 if (ret & IEEE80211_STA_DISABLE_VHT)
305 vht_chandef = *chandef;
306
ddfe49b4
JB		 307 /*
308 * Ignore the DISABLED flag when we're already connected and only
309 * tracking the APs beacon for bandwidth changes - otherwise we
310 * might get disconnected here if we connect to an AP, update our
311 * regulatory information based on the AP's country IE and the
312 * information we have is wrong/outdated and disables the channel
313 * that we're actually using for the connection to the AP.
314 */
6565ec9b 315 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
ddfe49b4
JB		 316 tracking ? 0 :
317 IEEE80211_CHAN_DISABLED)) {
6565ec9b
JB		 318 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
319 ret = IEEE80211_STA_DISABLE_HT |
320 IEEE80211_STA_DISABLE_VHT;
b56e4b85 321 break;
6565ec9b
JB		 322 }
323
e6b7cde4 324 ret |= ieee80211_chandef_downgrade(chandef);
6565ec9b
JB		 325 }
326
5cdaed1e 327 if (chandef->width != vht_chandef.width && !tracking)
6565ec9b
JB		 328 sdata_info(sdata,
329 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
330
331 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
332 return ret;
333}
334
30eb1dc2
JB		 335static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
336 struct sta_info *sta,
53b954ee 337 const struct ieee80211_ht_cap *ht_cap,
30eb1dc2
JB		 338 const struct ieee80211_ht_operation *ht_oper,
339 const struct ieee80211_vht_operation *vht_oper,
340 const u8 *bssid, u32 *changed)
d5522e03
JB		 341{
342 struct ieee80211_local *local = sdata->local;
30eb1dc2 343 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d5522e03 344 struct ieee80211_supported_band *sband;
55de908a 345 struct ieee80211_channel *chan;
30eb1dc2 346 struct cfg80211_chan_def chandef;
9ed6bcce 347 u16 ht_opmode;
30eb1dc2
JB		 348 u32 flags;
349 enum ieee80211_sta_rx_bandwidth new_sta_bw;
350 int ret;
d5522e03 351
30eb1dc2
JB		 352 /* if HT was/is disabled, don't track any bandwidth changes */
353 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
1128958d
JB		 354 return 0;
355
30eb1dc2
JB		 356 /* don't check VHT if we associated as non-VHT station */
357 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
358 vht_oper = NULL;
359
360 if (WARN_ON_ONCE(!sta))
361 return -EINVAL;
362
017b45bb
AA		 363 /*
364 * if bss configuration changed store the new one -
365 * this may be applicable even if channel is identical
366 */
367 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
368 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
369 *changed |= BSS_CHANGED_HT;
370 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
371 }
372
f2d9330e 373 chan = sdata->vif.bss_conf.chandef.chan;
55de908a 374 sband = local->hw.wiphy->bands[chan->band];
d5522e03 375
30eb1dc2 376 /* calculate new channel (type) based on HT/VHT operation IEs */
53b954ee
EP		 377 flags = ieee80211_determine_chantype(sdata, sband, chan,
378 ht_cap, ht_oper, vht_oper,
379 &chandef, true);
30eb1dc2
JB		 380
381 /*
382 * Downgrade the new channel if we associated with restricted
383 * capabilities. For example, if we associated as a 20 MHz STA
384 * to a 40 MHz AP (due to regulatory, capabilities or config
385 * reasons) then switching to a 40 MHz channel now won't do us
386 * any good -- we couldn't use it with the AP.
387 */
388 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
389 chandef.width == NL80211_CHAN_WIDTH_80P80)
e6b7cde4 390 flags |= ieee80211_chandef_downgrade(&chandef);
30eb1dc2
JB		 391 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
392 chandef.width == NL80211_CHAN_WIDTH_160)
e6b7cde4 393 flags |= ieee80211_chandef_downgrade(&chandef);
30eb1dc2
JB		 394 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
395 chandef.width > NL80211_CHAN_WIDTH_20)
e6b7cde4 396 flags |= ieee80211_chandef_downgrade(&chandef);
30eb1dc2
JB		 397
398 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
399 return 0;
400
401 sdata_info(sdata,
402 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
403 ifmgd->bssid, chandef.chan->center_freq, chandef.width,
404 chandef.center_freq1, chandef.center_freq2);
405
406 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
407 IEEE80211_STA_DISABLE_VHT |
408 IEEE80211_STA_DISABLE_40MHZ |
409 IEEE80211_STA_DISABLE_80P80MHZ |
410 IEEE80211_STA_DISABLE_160MHZ)) ||
411 !cfg80211_chandef_valid(&chandef)) {
412 sdata_info(sdata,
413 "AP %pM changed bandwidth in a way we can't support - disconnect\n",
414 ifmgd->bssid);
415 return -EINVAL;
416 }
417
418 switch (chandef.width) {
419 case NL80211_CHAN_WIDTH_20_NOHT:
420 case NL80211_CHAN_WIDTH_20:
421 new_sta_bw = IEEE80211_STA_RX_BW_20;
422 break;
4bf88530 423 case NL80211_CHAN_WIDTH_40:
30eb1dc2 424 new_sta_bw = IEEE80211_STA_RX_BW_40;
64f68e5d 425 break;
30eb1dc2
JB		 426 case NL80211_CHAN_WIDTH_80:
427 new_sta_bw = IEEE80211_STA_RX_BW_80;
428 break;
429 case NL80211_CHAN_WIDTH_80P80:
430 case NL80211_CHAN_WIDTH_160:
431 new_sta_bw = IEEE80211_STA_RX_BW_160;
64f68e5d 432 break;
30eb1dc2
JB		 433 default:
434 return -EINVAL;
64f68e5d 435 }
d5522e03 436
30eb1dc2
JB		 437 if (new_sta_bw > sta->cur_max_bandwidth)
438 new_sta_bw = sta->cur_max_bandwidth;
64f68e5d 439
30eb1dc2
JB		 440 if (new_sta_bw < sta->sta.bandwidth) {
441 sta->sta.bandwidth = new_sta_bw;
442 rate_control_rate_update(local, sband, sta,
443 IEEE80211_RC_BW_CHANGED);
444 }
64f68e5d 445
30eb1dc2
JB		 446 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
447 if (ret) {
448 sdata_info(sdata,
449 "AP %pM changed bandwidth to incompatible one - disconnect\n",
450 ifmgd->bssid);
451 return ret;
452 }
7cc44ed4 453
30eb1dc2
JB		 454 if (new_sta_bw > sta->sta.bandwidth) {
455 sta->sta.bandwidth = new_sta_bw;
456 rate_control_rate_update(local, sband, sta,
457 IEEE80211_RC_BW_CHANGED);
0aaffa9b 458 }
d5522e03 459
30eb1dc2 460 return 0;
d5522e03
JB		 461}
462
9c6bd790
JB		 463/* frame sending functions */
464
66e67e41 465static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
9dde6423 466 struct sk_buff *skb, u8 ap_ht_param,
66e67e41
JB		 467 struct ieee80211_supported_band *sband,
468 struct ieee80211_channel *channel,
469 enum ieee80211_smps_mode smps)
470{
66e67e41
JB		 471 u8 *pos;
472 u32 flags = channel->flags;
473 u16 cap;
474 struct ieee80211_sta_ht_cap ht_cap;
475
476 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
477
66e67e41
JB		 478 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
479 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
480
66e67e41
JB		 481 /* determine capability flags */
482 cap = ht_cap.cap;
483
9dde6423 484 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
66e67e41
JB		 485 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
486 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
487 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
488 cap &= ~IEEE80211_HT_CAP_SGI_40;
489 }
490 break;
491 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
492 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
493 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
494 cap &= ~IEEE80211_HT_CAP_SGI_40;
495 }
496 break;
497 }
498
24398e39
JB		 499 /*
500 * If 40 MHz was disabled associate as though we weren't
501 * capable of 40 MHz -- some broken APs will never fall
502 * back to trying to transmit in 20 MHz.
503 */
504 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
505 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
506 cap &= ~IEEE80211_HT_CAP_SGI_40;
507 }
508
66e67e41
JB		 509 /* set SM PS mode properly */
510 cap &= ~IEEE80211_HT_CAP_SM_PS;
511 switch (smps) {
512 case IEEE80211_SMPS_AUTOMATIC:
513 case IEEE80211_SMPS_NUM_MODES:
514 WARN_ON(1);
515 case IEEE80211_SMPS_OFF:
516 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
517 IEEE80211_HT_CAP_SM_PS_SHIFT;
518 break;
519 case IEEE80211_SMPS_STATIC:
520 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
521 IEEE80211_HT_CAP_SM_PS_SHIFT;
522 break;
523 case IEEE80211_SMPS_DYNAMIC:
524 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
525 IEEE80211_HT_CAP_SM_PS_SHIFT;
526 break;
527 }
528
529 /* reserve and fill IE */
530 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
531 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
532}
533
322cd406
SS		 534/* This function determines vht capability flags for the association
535 * and builds the IE.
536 * Note - the function may set the owner of the MU-MIMO capability
537 */
d545daba
MP		 538static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
539 struct sk_buff *skb,
b08fbbd8
JB		 540 struct ieee80211_supported_band *sband,
541 struct ieee80211_vht_cap *ap_vht_cap)
d545daba 542{
322cd406 543 struct ieee80211_local *local = sdata->local;
d545daba
MP		 544 u8 *pos;
545 u32 cap;
546 struct ieee80211_sta_vht_cap vht_cap;
c1cf6d4e 547 u32 mask, ap_bf_sts, our_bf_sts;
d545daba
MP		 548
549 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
550
551 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
dd5ecfea 552 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
d545daba
MP		 553
554 /* determine capability flags */
555 cap = vht_cap.cap;
556
f2d9d270 557 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
575f0530
JB		 558 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
559
560 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
561 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ ||
562 bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
563 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
f2d9d270
JB		 564 }
565
566 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
567 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
575f0530 568 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
f2d9d270
JB		 569 }
570
b08fbbd8
JB		 571 /*
572 * Some APs apparently get confused if our capabilities are better
573 * than theirs, so restrict what we advertise in the assoc request.
574 */
575 if (!(ap_vht_cap->vht_cap_info &
576 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
322cd406
SS		 577 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
578 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE);
579 else if (!(ap_vht_cap->vht_cap_info &
580 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE)))
581 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
582
583 /*
584 * If some other vif is using the MU-MIMO capablity we cannot associate
585 * using MU-MIMO - this will lead to contradictions in the group-id
586 * mechanism.
587 * Ownership is defined since association request, in order to avoid
588 * simultaneous associations with MU-MIMO.
589 */
590 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) {
591 bool disable_mu_mimo = false;
592 struct ieee80211_sub_if_data *other;
593
594 list_for_each_entry_rcu(other, &local->interfaces, list) {
595 if (other->flags & IEEE80211_SDATA_MU_MIMO_OWNER) {
596 disable_mu_mimo = true;
597 break;
598 }
599 }
600 if (disable_mu_mimo)
601 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
602 else
603 sdata->flags |= IEEE80211_SDATA_MU_MIMO_OWNER;
604 }
b08fbbd8 605
c1cf6d4e
ES		 606 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK;
607
608 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask;
609 our_bf_sts = cap & mask;
610
611 if (ap_bf_sts < our_bf_sts) {
612 cap &= ~mask;
613 cap |= ap_bf_sts;
614 }
615
d545daba 616 /* reserve and fill IE */
d4950281 617 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
d545daba
MP		 618 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
619}
620
66e67e41
JB		 621static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
622{
623 struct ieee80211_local *local = sdata->local;
624 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
625 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
626 struct sk_buff *skb;
627 struct ieee80211_mgmt *mgmt;
628 u8 *pos, qos_info;
629 size_t offset = 0, noffset;
2103dec1 630 int i, count, rates_len, supp_rates_len, shift;
66e67e41
JB		 631 u16 capab;
632 struct ieee80211_supported_band *sband;
55de908a
JB		 633 struct ieee80211_chanctx_conf *chanctx_conf;
634 struct ieee80211_channel *chan;
2103dec1 635 u32 rate_flags, rates = 0;
66e67e41 636
8d61ffa5 637 sdata_assert_lock(sdata);
66e67e41 638
55de908a
JB		 639 rcu_read_lock();
640 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
641 if (WARN_ON(!chanctx_conf)) {
642 rcu_read_unlock();
643 return;
644 }
4bf88530 645 chan = chanctx_conf->def.chan;
2103dec1 646 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
55de908a
JB		 647 rcu_read_unlock();
648 sband = local->hw.wiphy->bands[chan->band];
2103dec1 649 shift = ieee80211_vif_get_shift(&sdata->vif);
66e67e41
JB		 650
651 if (assoc_data->supp_rates_len) {
652 /*
653 * Get all rates supported by the device and the AP as
654 * some APs don't like getting a superset of their rates
655 * in the association request (e.g. D-Link DAP 1353 in
656 * b-only mode)...
657 */
2103dec1
SW		 658 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
659 assoc_data->supp_rates,
660 assoc_data->supp_rates_len,
661 &rates);
66e67e41
JB		 662 } else {
663 /*
664 * In case AP not provide any supported rates information
665 * before association, we send information element(s) with
666 * all rates that we support.
667 */
2103dec1
SW		 668 rates_len = 0;
669 for (i = 0; i < sband->n_bitrates; i++) {
670 if ((rate_flags & sband->bitrates[i].flags)
671 != rate_flags)
672 continue;
673 rates |= BIT(i);
674 rates_len++;
675 }
66e67e41
JB		 676 }
677
678 skb = alloc_skb(local->hw.extra_tx_headroom +
679 sizeof(*mgmt) + /* bit too much but doesn't matter */
680 2 + assoc_data->ssid_len + /* SSID */
681 4 + rates_len + /* (extended) rates */
682 4 + /* power capability */
683 2 + 2 * sband->n_channels + /* supported channels */
684 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
d4950281 685 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
66e67e41
JB		 686 assoc_data->ie_len + /* extra IEs */
687 9, /* WMM */
688 GFP_KERNEL);
689 if (!skb)
690 return;
691
692 skb_reserve(skb, local->hw.extra_tx_headroom);
693
694 capab = WLAN_CAPABILITY_ESS;
695
696 if (sband->band == IEEE80211_BAND_2GHZ) {
ea1b2b45
JB		 697 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
698 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
66e67e41
JB		 699 }
700
701 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
702 capab |= WLAN_CAPABILITY_PRIVACY;
703
704 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
30686bf7 705 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT))
66e67e41
JB		 706 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
707
cd2f5dd7
AK		 708 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM)
709 capab |= WLAN_CAPABILITY_RADIO_MEASURE;
710
66e67e41
JB		 711 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
712 memset(mgmt, 0, 24);
713 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
714 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
715 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
716
717 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
718 skb_put(skb, 10);
719 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
720 IEEE80211_STYPE_REASSOC_REQ);
721 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
722 mgmt->u.reassoc_req.listen_interval =
723 cpu_to_le16(local->hw.conf.listen_interval);
724 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
725 ETH_ALEN);
726 } else {
727 skb_put(skb, 4);
728 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
729 IEEE80211_STYPE_ASSOC_REQ);
730 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
731 mgmt->u.assoc_req.listen_interval =
732 cpu_to_le16(local->hw.conf.listen_interval);
733 }
734
735 /* SSID */
736 pos = skb_put(skb, 2 + assoc_data->ssid_len);
737 *pos++ = WLAN_EID_SSID;
738 *pos++ = assoc_data->ssid_len;
739 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
740
741 /* add all rates which were marked to be used above */
742 supp_rates_len = rates_len;
743 if (supp_rates_len > 8)
744 supp_rates_len = 8;
745
746 pos = skb_put(skb, supp_rates_len + 2);
747 *pos++ = WLAN_EID_SUPP_RATES;
748 *pos++ = supp_rates_len;
749
750 count = 0;
751 for (i = 0; i < sband->n_bitrates; i++) {
752 if (BIT(i) & rates) {
2103dec1
SW		 753 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
754 5 * (1 << shift));
755 *pos++ = (u8) rate;
66e67e41
JB		 756 if (++count == 8)
757 break;
758 }
759 }
760
761 if (rates_len > count) {
762 pos = skb_put(skb, rates_len - count + 2);
763 *pos++ = WLAN_EID_EXT_SUPP_RATES;
764 *pos++ = rates_len - count;
765
766 for (i++; i < sband->n_bitrates; i++) {
767 if (BIT(i) & rates) {
2103dec1
SW		 768 int rate;
769 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
770 5 * (1 << shift));
771 *pos++ = (u8) rate;
66e67e41
JB		 772 }
773 }
774 }
775
cd2f5dd7
AK		 776 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT ||
777 capab & WLAN_CAPABILITY_RADIO_MEASURE) {
66e67e41
JB		 778 pos = skb_put(skb, 4);
779 *pos++ = WLAN_EID_PWR_CAPABILITY;
780 *pos++ = 2;
781 *pos++ = 0; /* min tx power */
0430c883
SW		 782 /* max tx power */
783 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
cd2f5dd7 784 }
66e67e41 785
cd2f5dd7 786 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
66e67e41
JB		 787 /* TODO: get this in reg domain format */
788 pos = skb_put(skb, 2 * sband->n_channels + 2);
789 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
790 *pos++ = 2 * sband->n_channels;
791 for (i = 0; i < sband->n_channels; i++) {
792 *pos++ = ieee80211_frequency_to_channel(
793 sband->channels[i].center_freq);
794 *pos++ = 1; /* one channel in the subband*/
795 }
796 }
797
798 /* if present, add any custom IEs that go before HT */
b3f51e94 799 if (assoc_data->ie_len) {
66e67e41
JB		 800 static const u8 before_ht[] = {
801 WLAN_EID_SSID,
802 WLAN_EID_SUPP_RATES,
803 WLAN_EID_EXT_SUPP_RATES,
804 WLAN_EID_PWR_CAPABILITY,
805 WLAN_EID_SUPPORTED_CHANNELS,
806 WLAN_EID_RSN,
807 WLAN_EID_QOS_CAPA,
808 WLAN_EID_RRM_ENABLED_CAPABILITIES,
809 WLAN_EID_MOBILITY_DOMAIN,
8ed28747
JB		 810 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */
811 WLAN_EID_RIC_DATA, /* reassoc only */
66e67e41
JB		 812 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
813 };
8ed28747
JB		 814 static const u8 after_ric[] = {
815 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
816 WLAN_EID_HT_CAPABILITY,
817 WLAN_EID_BSS_COEX_2040,
818 WLAN_EID_EXT_CAPABILITY,
819 WLAN_EID_QOS_TRAFFIC_CAPA,
820 WLAN_EID_TIM_BCAST_REQ,
821 WLAN_EID_INTERWORKING,
822 /* 60GHz doesn't happen right now */
823 WLAN_EID_VHT_CAPABILITY,
824 WLAN_EID_OPMODE_NOTIF,
825 };
826
827 noffset = ieee80211_ie_split_ric(assoc_data->ie,
828 assoc_data->ie_len,
829 before_ht,
830 ARRAY_SIZE(before_ht),
831 after_ric,
832 ARRAY_SIZE(after_ric),
833 offset);
66e67e41
JB		 834 pos = skb_put(skb, noffset - offset);
835 memcpy(pos, assoc_data->ie + offset, noffset - offset);
836 offset = noffset;
837 }
838
f2d9d270
JB		 839 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
840 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
841 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
842
a8243b72 843 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
9dde6423 844 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
04ecd257 845 sband, chan, sdata->smps_mode);
66e67e41 846
3de3802c
JB		 847 /* if present, add any custom IEs that go before VHT */
848 if (assoc_data->ie_len) {
849 static const u8 before_vht[] = {
850 WLAN_EID_SSID,
851 WLAN_EID_SUPP_RATES,
852 WLAN_EID_EXT_SUPP_RATES,
853 WLAN_EID_PWR_CAPABILITY,
854 WLAN_EID_SUPPORTED_CHANNELS,
855 WLAN_EID_RSN,
856 WLAN_EID_QOS_CAPA,
857 WLAN_EID_RRM_ENABLED_CAPABILITIES,
858 WLAN_EID_MOBILITY_DOMAIN,
859 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
860 WLAN_EID_HT_CAPABILITY,
861 WLAN_EID_BSS_COEX_2040,
862 WLAN_EID_EXT_CAPABILITY,
863 WLAN_EID_QOS_TRAFFIC_CAPA,
864 WLAN_EID_TIM_BCAST_REQ,
865 WLAN_EID_INTERWORKING,
866 };
8ed28747
JB		 867
868 /* RIC already taken above, so no need to handle here anymore */
3de3802c
JB		 869 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
870 before_vht, ARRAY_SIZE(before_vht),
871 offset);
872 pos = skb_put(skb, noffset - offset);
873 memcpy(pos, assoc_data->ie + offset, noffset - offset);
874 offset = noffset;
875 }
876
d545daba 877 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
b08fbbd8
JB		 878 ieee80211_add_vht_ie(sdata, skb, sband,
879 &assoc_data->ap_vht_cap);
d545daba 880
66e67e41 881 /* if present, add any custom non-vendor IEs that go after HT */
b3f51e94 882 if (assoc_data->ie_len) {
66e67e41
JB		 883 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
884 assoc_data->ie_len,
885 offset);
886 pos = skb_put(skb, noffset - offset);
887 memcpy(pos, assoc_data->ie + offset, noffset - offset);
888 offset = noffset;
889 }
890
76f0303d
JB		 891 if (assoc_data->wmm) {
892 if (assoc_data->uapsd) {
dc41e4d4
EP		 893 qos_info = ifmgd->uapsd_queues;
894 qos_info |= (ifmgd->uapsd_max_sp_len <<
66e67e41
JB		 895 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
896 } else {
897 qos_info = 0;
898 }
899
40b861a0 900 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
66e67e41
JB		 901 }
902
903 /* add any remaining custom (i.e. vendor specific here) IEs */
b3f51e94 904 if (assoc_data->ie_len) {
66e67e41
JB		 905 noffset = assoc_data->ie_len;
906 pos = skb_put(skb, noffset - offset);
907 memcpy(pos, assoc_data->ie + offset, noffset - offset);
908 }
909
a1845fc7
JB		 910 drv_mgd_prepare_tx(local, sdata);
911
66e67e41 912 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
30686bf7 913 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1672c0e3
JB		 914 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
915 IEEE80211_TX_INTFL_MLME_CONN_TX;
66e67e41
JB		 916 ieee80211_tx_skb(sdata, skb);
917}
918
572e0012
KV		 919void ieee80211_send_pspoll(struct ieee80211_local *local,
920 struct ieee80211_sub_if_data *sdata)
921{
572e0012
KV		 922 struct ieee80211_pspoll *pspoll;
923 struct sk_buff *skb;
572e0012 924
d8cd189e
KV		 925 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
926 if (!skb)
572e0012 927 return;
572e0012 928
d8cd189e
KV		 929 pspoll = (struct ieee80211_pspoll *) skb->data;
930 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
572e0012 931
62ae67be
JB		 932 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
933 ieee80211_tx_skb(sdata, skb);
572e0012
KV		 934}
935
965bedad
JB		 936void ieee80211_send_nullfunc(struct ieee80211_local *local,
937 struct ieee80211_sub_if_data *sdata,
076cdcb1 938 bool powersave)
965bedad
JB		 939{
940 struct sk_buff *skb;
d8cd189e 941 struct ieee80211_hdr_3addr *nullfunc;
b6f35301 942 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
965bedad 943
d8cd189e
KV		 944 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
945 if (!skb)
965bedad 946 return;
965bedad 947
d8cd189e 948 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
965bedad 949 if (powersave)
d8cd189e 950 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
965bedad 951
6c17b77b
SF		 952 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
953 IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
ff40b425 954
30686bf7 955 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
ff40b425
PF		 956 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
957
392b9ffb 958 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
b6f35301
RM		 959 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
960
62ae67be 961 ieee80211_tx_skb(sdata, skb);
965bedad
JB		 962}
963
d524215f
FF		 964static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
965 struct ieee80211_sub_if_data *sdata)
966{
967 struct sk_buff *skb;
968 struct ieee80211_hdr *nullfunc;
969 __le16 fc;
970
971 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
972 return;
973
974 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
d15b8459 975 if (!skb)
d524215f 976 return;
d15b8459 977
d524215f
FF		 978 skb_reserve(skb, local->hw.extra_tx_headroom);
979
980 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
981 memset(nullfunc, 0, 30);
982 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
983 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
984 nullfunc->frame_control = fc;
985 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
986 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
987 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
988 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
989
990 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
991 ieee80211_tx_skb(sdata, skb);
992}
993
cc32abd4
JB		 994/* spectrum management related things */
995static void ieee80211_chswitch_work(struct work_struct *work)
996{
997 struct ieee80211_sub_if_data *sdata =
998 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
675a0b04 999 struct ieee80211_local *local = sdata->local;
cc32abd4 1000 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
7578d575 1001 int ret;
cc32abd4 1002
9607e6b6 1003 if (!ieee80211_sdata_running(sdata))
cc32abd4
JB		 1004 return;
1005
8d61ffa5 1006 sdata_lock(sdata);
4c3ebc56
MK		 1007 mutex_lock(&local->mtx);
1008 mutex_lock(&local->chanctx_mtx);
1009
77fdaa12
JB		 1010 if (!ifmgd->associated)
1011 goto out;
cc32abd4 1012
4c3ebc56
MK		 1013 if (!sdata->vif.csa_active)
1014 goto out;
1015
1016 /*
1017 * using reservation isn't immediate as it may be deferred until later
1018 * with multi-vif. once reservation is complete it will re-schedule the
1019 * work with no reserved_chanctx so verify chandef to check if it
1020 * completed successfully
1021 */
1022
1023 if (sdata->reserved_chanctx) {
1024 /*
1025 * with multi-vif csa driver may call ieee80211_csa_finish()
1026 * many times while waiting for other interfaces to use their
1027 * reservations
1028 */
1029 if (sdata->reserved_ready)
1030 goto out;
1031
1032 ret = ieee80211_vif_use_reserved_context(sdata);
1033 if (ret) {
1034 sdata_info(sdata,
1035 "failed to use reserved channel context, disconnecting (err=%d)\n",
1036 ret);
1037 ieee80211_queue_work(&sdata->local->hw,
1038 &ifmgd->csa_connection_drop_work);
1039 goto out;
1040 }
1041
1042 goto out;
1043 }
1044
1045 if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
1046 &sdata->csa_chandef)) {
7578d575 1047 sdata_info(sdata,
4c3ebc56 1048 "failed to finalize channel switch, disconnecting\n");
7578d575
AN		 1049 ieee80211_queue_work(&sdata->local->hw,
1050 &ifmgd->csa_connection_drop_work);
1051 goto out;
1052 }
675a0b04 1053
cc32abd4 1054 /* XXX: shouldn't really modify cfg80211-owned data! */
33787fc4 1055 ifmgd->associated->channel = sdata->csa_chandef.chan;
cc32abd4 1056
0c21e632
LC		 1057 ifmgd->csa_waiting_bcn = true;
1058
1059 ieee80211_sta_reset_beacon_monitor(sdata);
1060 ieee80211_sta_reset_conn_monitor(sdata);
1061
1062out:
1063 mutex_unlock(&local->chanctx_mtx);
1064 mutex_unlock(&local->mtx);
1065 sdata_unlock(sdata);
1066}
1067
1068static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata)
1069{
1070 struct ieee80211_local *local = sdata->local;
1071 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1072 int ret;
1073
1074 sdata_assert_lock(sdata);
1075
1076 WARN_ON(!sdata->vif.csa_active);
4c3ebc56 1077
a46992b4
LC		 1078 if (sdata->csa_block_tx) {
1079 ieee80211_wake_vif_queues(local, sdata,
1080 IEEE80211_QUEUE_STOP_REASON_CSA);
1081 sdata->csa_block_tx = false;
1082 }
7578d575 1083
0c21e632
LC		 1084 sdata->vif.csa_active = false;
1085 ifmgd->csa_waiting_bcn = false;
1086
f1d65583
LC		 1087 ret = drv_post_channel_switch(sdata);
1088 if (ret) {
1089 sdata_info(sdata,
1090 "driver post channel switch failed, disconnecting\n");
1091 ieee80211_queue_work(&local->hw,
1092 &ifmgd->csa_connection_drop_work);
0c21e632 1093 return;
f1d65583 1094 }
688b1ecf
LC		 1095
1096 cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef);
cc32abd4
JB		 1097}
1098
5ce6e438
JB		 1099void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1100{
55de908a
JB		 1101 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1102 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5ce6e438
JB		 1103
1104 trace_api_chswitch_done(sdata, success);
1105 if (!success) {
882a7c69
JB		 1106 sdata_info(sdata,
1107 "driver channel switch failed, disconnecting\n");
1108 ieee80211_queue_work(&sdata->local->hw,
1109 &ifmgd->csa_connection_drop_work);
1110 } else {
1111 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
5ce6e438 1112 }
5ce6e438
JB		 1113}
1114EXPORT_SYMBOL(ieee80211_chswitch_done);
1115
cc32abd4
JB		 1116static void ieee80211_chswitch_timer(unsigned long data)
1117{
1118 struct ieee80211_sub_if_data *sdata =
1119 (struct ieee80211_sub_if_data *) data;
5bb644a0 1120
9b7d72c1 1121 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
cc32abd4
JB		 1122}
1123
37799e52 1124static void
4a3cb702 1125ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
2ba45384
LC		 1126 u64 timestamp, u32 device_timestamp,
1127 struct ieee802_11_elems *elems,
04a161f4 1128 bool beacon)
cc32abd4 1129{
b4f286a1 1130 struct ieee80211_local *local = sdata->local;
cc32abd4 1131 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
37799e52 1132 struct cfg80211_bss *cbss = ifmgd->associated;
4c3ebc56 1133 struct ieee80211_chanctx_conf *conf;
55de908a 1134 struct ieee80211_chanctx *chanctx;
e6b7cde4 1135 enum ieee80211_band current_band;
c0f17eb9 1136 struct ieee80211_csa_ie csa_ie;
6d027bcc 1137 struct ieee80211_channel_switch ch_switch;
e6b7cde4 1138 int res;
cc32abd4 1139
8d61ffa5 1140 sdata_assert_lock(sdata);
77fdaa12 1141
37799e52 1142 if (!cbss)
cc32abd4
JB		 1143 return;
1144
b4f286a1 1145 if (local->scanning)
cc32abd4
JB		 1146 return;
1147
37799e52 1148 /* disregard subsequent announcements if we are already processing */
3e2a0226 1149 if (sdata->vif.csa_active)
cc32abd4
JB		 1150 return;
1151
e6b7cde4 1152 current_band = cbss->channel->band;
c0f17eb9 1153 memset(&csa_ie, 0, sizeof(csa_ie));
84469a45 1154 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band,
e6b7cde4 1155 ifmgd->flags,
c0f17eb9 1156 ifmgd->associated->bssid, &csa_ie);
e6b7cde4 1157 if (res < 0)
b4f286a1 1158 ieee80211_queue_work(&local->hw,
882a7c69 1159 &ifmgd->csa_connection_drop_work);
e6b7cde4 1160 if (res)
cc32abd4 1161 return;
cd64f2a9 1162
c0f17eb9 1163 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
85220d71
JB		 1164 IEEE80211_CHAN_DISABLED)) {
1165 sdata_info(sdata,
1166 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
e6b7cde4 1167 ifmgd->associated->bssid,
c0f17eb9
CYY		 1168 csa_ie.chandef.chan->center_freq,
1169 csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1170 csa_ie.chandef.center_freq2);
85220d71
JB		 1171 ieee80211_queue_work(&local->hw,
1172 &ifmgd->csa_connection_drop_work);
1173 return;
1174 }
1175
f84eaa10
JB		 1176 if (cfg80211_chandef_identical(&csa_ie.chandef,
1177 &sdata->vif.bss_conf.chandef)) {
1178 if (ifmgd->csa_ignored_same_chan)
1179 return;
1180 sdata_info(sdata,
1181 "AP %pM tries to chanswitch to same channel, ignore\n",
1182 ifmgd->associated->bssid);
1183 ifmgd->csa_ignored_same_chan = true;
1184 return;
1185 }
1186
c5a71688
AN		 1187 /*
1188 * Drop all TDLS peers - either we disconnect or move to a different
1189 * channel from this point on. There's no telling what our peer will do.
1190 * The TDLS WIDER_BW scenario is also problematic, as peers might now
1191 * have an incompatible wider chandef.
1192 */
1193 ieee80211_teardown_tdls_peers(sdata);
1194
4c3ebc56 1195 mutex_lock(&local->mtx);
7578d575 1196 mutex_lock(&local->chanctx_mtx);
4c3ebc56
MK		 1197 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1198 lockdep_is_held(&local->chanctx_mtx));
1199 if (!conf) {
1200 sdata_info(sdata,
1201 "no channel context assigned to vif?, disconnecting\n");
f3b0bbb3 1202 goto drop_connection;
4c3ebc56
MK		 1203 }
1204
1205 chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1206
0f791eb4 1207 if (local->use_chanctx &&
30686bf7 1208 !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) {
0f791eb4
LC		 1209 sdata_info(sdata,
1210 "driver doesn't support chan-switch with channel contexts\n");
f3b0bbb3 1211 goto drop_connection;
55de908a
JB		 1212 }
1213
6d027bcc
LC		 1214 ch_switch.timestamp = timestamp;
1215 ch_switch.device_timestamp = device_timestamp;
1216 ch_switch.block_tx = csa_ie.mode;
1217 ch_switch.chandef = csa_ie.chandef;
1218 ch_switch.count = csa_ie.count;
1219
1220 if (drv_pre_channel_switch(sdata, &ch_switch)) {
1221 sdata_info(sdata,
1222 "preparing for channel switch failed, disconnecting\n");
f3b0bbb3 1223 goto drop_connection;
6d027bcc
LC		 1224 }
1225
4c3ebc56
MK		 1226 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1227 chanctx->mode, false);
1228 if (res) {
55de908a 1229 sdata_info(sdata,
4c3ebc56
MK		 1230 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1231 res);
f3b0bbb3 1232 goto drop_connection;
55de908a 1233 }
b4f286a1 1234 mutex_unlock(&local->chanctx_mtx);
55de908a 1235
c46a73f3 1236 sdata->vif.csa_active = true;
4c3ebc56 1237 sdata->csa_chandef = csa_ie.chandef;
59af6928 1238 sdata->csa_block_tx = csa_ie.mode;
f84eaa10 1239 ifmgd->csa_ignored_same_chan = false;
55de908a 1240
59af6928 1241 if (sdata->csa_block_tx)
a46992b4
LC		 1242 ieee80211_stop_vif_queues(local, sdata,
1243 IEEE80211_QUEUE_STOP_REASON_CSA);
59af6928 1244 mutex_unlock(&local->mtx);
57eebdf3 1245
2f457293
LC		 1246 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef,
1247 csa_ie.count);
1248
b4f286a1 1249 if (local->ops->channel_switch) {
5ce6e438 1250 /* use driver's channel switch callback */
0f791eb4 1251 drv_channel_switch(local, sdata, &ch_switch);
5ce6e438
JB		 1252 return;
1253 }
1254
1255 /* channel switch handled in software */
c0f17eb9 1256 if (csa_ie.count <= 1)
b4f286a1 1257 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
57eebdf3 1258 else
cc32abd4 1259 mod_timer(&ifmgd->chswitch_timer,
ff1e417c
LC		 1260 TU_TO_EXP_TIME((csa_ie.count - 1) *
1261 cbss->beacon_interval));
f3b0bbb3
JB		 1262 return;
1263 drop_connection:
1264 ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work);
1265 mutex_unlock(&local->chanctx_mtx);
1266 mutex_unlock(&local->mtx);
cc32abd4
JB		 1267}
1268
24a4e400
SG		 1269static bool
1270ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1271 struct ieee80211_channel *channel,
1272 const u8 *country_ie, u8 country_ie_len,
1273 const u8 *pwr_constr_elem,
1274 int *chan_pwr, int *pwr_reduction)
cc32abd4 1275{
04b7b2ff
JB		 1276 struct ieee80211_country_ie_triplet *triplet;
1277 int chan = ieee80211_frequency_to_channel(channel->center_freq);
24a4e400 1278 int i, chan_increment;
04b7b2ff 1279 bool have_chan_pwr = false;
cc32abd4 1280
04b7b2ff
JB		 1281 /* Invalid IE */
1282 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
24a4e400 1283 return false;
cc32abd4 1284
04b7b2ff
JB		 1285 triplet = (void *)(country_ie + 3);
1286 country_ie_len -= 3;
1287
1288 switch (channel->band) {
1289 default:
1290 WARN_ON_ONCE(1);
1291 /* fall through */
1292 case IEEE80211_BAND_2GHZ:
1293 case IEEE80211_BAND_60GHZ:
1294 chan_increment = 1;
1295 break;
1296 case IEEE80211_BAND_5GHZ:
1297 chan_increment = 4;
1298 break;
cc32abd4 1299 }
04b7b2ff
JB		 1300
1301 /* find channel */
1302 while (country_ie_len >= 3) {
1303 u8 first_channel = triplet->chans.first_channel;
1304
1305 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1306 goto next;
1307
1308 for (i = 0; i < triplet->chans.num_channels; i++) {
1309 if (first_channel + i * chan_increment == chan) {
1310 have_chan_pwr = true;
24a4e400 1311 *chan_pwr = triplet->chans.max_power;
04b7b2ff
JB		 1312 break;
1313 }
1314 }
1315 if (have_chan_pwr)
1316 break;
1317
1318 next:
1319 triplet++;
1320 country_ie_len -= 3;
1321 }
1322
a5fee9cb 1323 if (have_chan_pwr && pwr_constr_elem)
24a4e400 1324 *pwr_reduction = *pwr_constr_elem;
a5fee9cb
MB		 1325 else
1326 *pwr_reduction = 0;
1327
24a4e400
SG		 1328 return have_chan_pwr;
1329}
1330
c8d65917
SG		 1331static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
1332 struct ieee80211_channel *channel,
1333 const u8 *cisco_dtpc_ie,
1334 int *pwr_level)
1335{
1336 /* From practical testing, the first data byte of the DTPC element
1337 * seems to contain the requested dBm level, and the CLI on Cisco
1338 * APs clearly state the range is -127 to 127 dBm, which indicates
1339 * a signed byte, although it seemingly never actually goes negative.
1340 * The other byte seems to always be zero.
1341 */
1342 *pwr_level = (__s8)cisco_dtpc_ie[4];
1343}
1344
24a4e400
SG		 1345static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1346 struct ieee80211_channel *channel,
1347 struct ieee80211_mgmt *mgmt,
1348 const u8 *country_ie, u8 country_ie_len,
c8d65917
SG		 1349 const u8 *pwr_constr_ie,
1350 const u8 *cisco_dtpc_ie)
24a4e400 1351{
c8d65917
SG		 1352 bool has_80211h_pwr = false, has_cisco_pwr = false;
1353 int chan_pwr = 0, pwr_reduction_80211h = 0;
1354 int pwr_level_cisco, pwr_level_80211h;
24a4e400 1355 int new_ap_level;
a5fee9cb 1356 __le16 capab = mgmt->u.probe_resp.capab_info;
04b7b2ff 1357
a5fee9cb
MB		 1358 if (country_ie &&
1359 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) ||
1360 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) {
24a4e400
SG		 1361 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
1362 sdata, channel, country_ie, country_ie_len,
1363 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
c8d65917
SG		 1364 pwr_level_80211h =
1365 max_t(int, 0, chan_pwr - pwr_reduction_80211h);
1366 }
1367
1368 if (cisco_dtpc_ie) {
1369 ieee80211_find_cisco_dtpc(
1370 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
1371 has_cisco_pwr = true;
24a4e400 1372 }
04b7b2ff 1373
c8d65917 1374 if (!has_80211h_pwr && !has_cisco_pwr)
1ea6f9c0 1375 return 0;
04b7b2ff 1376
c8d65917
SG		 1377 /* If we have both 802.11h and Cisco DTPC, apply both limits
1378 * by picking the smallest of the two power levels advertised.
1379 */
1380 if (has_80211h_pwr &&
1381 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
cef2fc1c
JL		 1382 sdata_dbg(sdata,
1383 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1384 pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
1385 sdata->u.mgd.bssid);
c8d65917
SG		 1386 new_ap_level = pwr_level_80211h;
1387 } else { /* has_cisco_pwr is always true here. */
cef2fc1c
JL		 1388 sdata_dbg(sdata,
1389 "Limiting TX power to %d dBm as advertised by %pM\n",
1390 pwr_level_cisco, sdata->u.mgd.bssid);
c8d65917
SG		 1391 new_ap_level = pwr_level_cisco;
1392 }
04b7b2ff 1393
1ea6f9c0
JB		 1394 if (sdata->ap_power_level == new_ap_level)
1395 return 0;
04b7b2ff 1396
1ea6f9c0
JB		 1397 sdata->ap_power_level = new_ap_level;
1398 if (__ieee80211_recalc_txpower(sdata))
1399 return BSS_CHANGED_TXPOWER;
1400 return 0;
cc32abd4
JB		 1401}
1402
965bedad
JB		 1403/* powersave */
1404static void ieee80211_enable_ps(struct ieee80211_local *local,
1405 struct ieee80211_sub_if_data *sdata)
1406{
1407 struct ieee80211_conf *conf = &local->hw.conf;
1408
d5edaedc
JB		 1409 /*
1410 * If we are scanning right now then the parameters will
1411 * take effect when scan finishes.
1412 */
fbe9c429 1413 if (local->scanning)
d5edaedc
JB		 1414 return;
1415
965bedad 1416 if (conf->dynamic_ps_timeout > 0 &&
30686bf7 1417 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) {
965bedad
JB		 1418 mod_timer(&local->dynamic_ps_timer, jiffies +
1419 msecs_to_jiffies(conf->dynamic_ps_timeout));
1420 } else {
30686bf7 1421 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK))
076cdcb1 1422 ieee80211_send_nullfunc(local, sdata, true);
375177bf 1423
30686bf7
JB		 1424 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1425 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
2a13052f
JO		 1426 return;
1427
1428 conf->flags |= IEEE80211_CONF_PS;
1429 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965bedad
JB		 1430 }
1431}
1432
1433static void ieee80211_change_ps(struct ieee80211_local *local)
1434{
1435 struct ieee80211_conf *conf = &local->hw.conf;
1436
1437 if (local->ps_sdata) {
965bedad
JB		 1438 ieee80211_enable_ps(local, local->ps_sdata);
1439 } else if (conf->flags & IEEE80211_CONF_PS) {
1440 conf->flags &= ~IEEE80211_CONF_PS;
1441 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1442 del_timer_sync(&local->dynamic_ps_timer);
1443 cancel_work_sync(&local->dynamic_ps_enable_work);
1444 }
1445}
1446
808118cb
JY		 1447static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1448{
1449 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1450 struct sta_info *sta = NULL;
c2c98fde 1451 bool authorized = false;
808118cb
JY		 1452
1453 if (!mgd->powersave)
1454 return false;
1455
05cb9108
JB		 1456 if (mgd->broken_ap)
1457 return false;
1458
808118cb
JY		 1459 if (!mgd->associated)
1460 return false;
1461
392b9ffb 1462 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
808118cb
JY		 1463 return false;
1464
989c6505 1465 if (!mgd->have_beacon)
ce857888
AB		 1466 return false;
1467
808118cb
JY		 1468 rcu_read_lock();
1469 sta = sta_info_get(sdata, mgd->bssid);
1470 if (sta)
c2c98fde 1471 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
808118cb
JY		 1472 rcu_read_unlock();
1473
c2c98fde 1474 return authorized;
808118cb
JY		 1475}
1476
965bedad 1477/* need to hold RTNL or interface lock */
4a733ef1 1478void ieee80211_recalc_ps(struct ieee80211_local *local)
965bedad
JB		 1479{
1480 struct ieee80211_sub_if_data *sdata, *found = NULL;
1481 int count = 0;
195e294d 1482 int timeout;
965bedad 1483
30686bf7 1484 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) {
965bedad
JB		 1485 local->ps_sdata = NULL;
1486 return;
1487 }
1488
1489 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 1490 if (!ieee80211_sdata_running(sdata))
965bedad 1491 continue;
8c7914de
RM		 1492 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1493 /* If an AP vif is found, then disable PS
1494 * by setting the count to zero thereby setting
1495 * ps_sdata to NULL.
1496 */
1497 count = 0;
1498 break;
1499 }
965bedad
JB		 1500 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1501 continue;
1502 found = sdata;
1503 count++;
1504 }
1505
808118cb 1506 if (count == 1 && ieee80211_powersave_allowed(found)) {
4a733ef1 1507 u8 dtimper = found->u.mgd.dtim_period;
10f644a4
JB		 1508 s32 beaconint_us;
1509
10f644a4
JB		 1510 beaconint_us = ieee80211_tu_to_usec(
1511 found->vif.bss_conf.beacon_int);
1512
ff616381 1513 timeout = local->dynamic_ps_forced_timeout;
4a733ef1
JB		 1514 if (timeout < 0)
1515 timeout = 100;
09b85568 1516 local->hw.conf.dynamic_ps_timeout = timeout;
195e294d 1517
4a733ef1
JB		 1518 /* If the TIM IE is invalid, pretend the value is 1 */
1519 if (!dtimper)
1520 dtimper = 1;
1521
1522 local->hw.conf.ps_dtim_period = dtimper;
1523 local->ps_sdata = found;
10f644a4 1524 } else {
965bedad 1525 local->ps_sdata = NULL;
10f644a4 1526 }
965bedad
JB		 1527
1528 ieee80211_change_ps(local);
1529}
1530
ab095877
EP		 1531void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1532{
1533 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1534
1535 if (sdata->vif.bss_conf.ps != ps_allowed) {
1536 sdata->vif.bss_conf.ps = ps_allowed;
1537 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1538 }
1539}
1540
965bedad
JB		 1541void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1542{
1543 struct ieee80211_local *local =
1544 container_of(work, struct ieee80211_local,
1545 dynamic_ps_disable_work);
1546
1547 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1548 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1549 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1550 }
1551
1552 ieee80211_wake_queues_by_reason(&local->hw,
445ea4e8 1553 IEEE80211_MAX_QUEUE_MAP,
cca07b00
LC		 1554 IEEE80211_QUEUE_STOP_REASON_PS,
1555 false);
965bedad
JB		 1556}
1557
1558void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1559{
1560 struct ieee80211_local *local =
1561 container_of(work, struct ieee80211_local,
1562 dynamic_ps_enable_work);
1563 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
5e34069c 1564 struct ieee80211_if_managed *ifmgd;
1ddc2867
RM		 1565 unsigned long flags;
1566 int q;
965bedad
JB		 1567
1568 /* can only happen when PS was just disabled anyway */
1569 if (!sdata)
1570 return;
1571
5e34069c
CL		 1572 ifmgd = &sdata->u.mgd;
1573
965bedad
JB		 1574 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1575 return;
1576
09b85568 1577 if (local->hw.conf.dynamic_ps_timeout > 0) {
77b7023a
AN		 1578 /* don't enter PS if TX frames are pending */
1579 if (drv_tx_frames_pending(local)) {
1ddc2867
RM		 1580 mod_timer(&local->dynamic_ps_timer, jiffies +
1581 msecs_to_jiffies(
1582 local->hw.conf.dynamic_ps_timeout));
1583 return;
1584 }
77b7023a
AN		 1585
1586 /*
1587 * transmission can be stopped by others which leads to
1588 * dynamic_ps_timer expiry. Postpone the ps timer if it
1589 * is not the actual idle state.
1590 */
1591 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1592 for (q = 0; q < local->hw.queues; q++) {
1593 if (local->queue_stop_reasons[q]) {
1594 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1595 flags);
1596 mod_timer(&local->dynamic_ps_timer, jiffies +
1597 msecs_to_jiffies(
1598 local->hw.conf.dynamic_ps_timeout));
1599 return;
1600 }
1601 }
1602 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1ddc2867 1603 }
1ddc2867 1604
30686bf7 1605 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
9c38a8b4 1606 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
a1598383 1607 if (drv_tx_frames_pending(local)) {
e8306f98
VN		 1608 mod_timer(&local->dynamic_ps_timer, jiffies +
1609 msecs_to_jiffies(
1610 local->hw.conf.dynamic_ps_timeout));
a1598383 1611 } else {
076cdcb1 1612 ieee80211_send_nullfunc(local, sdata, true);
e8306f98 1613 /* Flush to get the tx status of nullfunc frame */
3b24f4c6 1614 ieee80211_flush_queues(local, sdata, false);
e8306f98 1615 }
f3e85b9e
VN		 1616 }
1617
30686bf7
JB		 1618 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
1619 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) ||
375177bf
VN		 1620 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1621 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1622 local->hw.conf.flags |= IEEE80211_CONF_PS;
1623 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1624 }
965bedad
JB		 1625}
1626
1627void ieee80211_dynamic_ps_timer(unsigned long data)
1628{
1629 struct ieee80211_local *local = (void *) data;
1630
42935eca 1631 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 1632}
1633
164eb02d
SW		 1634void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1635{
1636 struct delayed_work *delayed_work =
1637 container_of(work, struct delayed_work, work);
1638 struct ieee80211_sub_if_data *sdata =
1639 container_of(delayed_work, struct ieee80211_sub_if_data,
1640 dfs_cac_timer_work);
d2859df5 1641 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
164eb02d 1642
34a3740d
JB		 1643 mutex_lock(&sdata->local->mtx);
1644 if (sdata->wdev.cac_started) {
1645 ieee80211_vif_release_channel(sdata);
1646 cfg80211_cac_event(sdata->dev, &chandef,
1647 NL80211_RADAR_CAC_FINISHED,
1648 GFP_KERNEL);
1649 }
1650 mutex_unlock(&sdata->local->mtx);
164eb02d
SW		 1651}
1652
02219b3a
JB		 1653static bool
1654__ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1655{
1656 struct ieee80211_local *local = sdata->local;
1657 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
cc72f6e2 1658 bool ret = false;
02219b3a
JB		 1659 int ac;
1660
1661 if (local->hw.queues < IEEE80211_NUM_ACS)
1662 return false;
1663
1664 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1665 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
1666 int non_acm_ac;
1667 unsigned long now = jiffies;
1668
1669 if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
1670 tx_tspec->admitted_time &&
1671 time_after(now, tx_tspec->time_slice_start + HZ)) {
1672 tx_tspec->consumed_tx_time = 0;
1673 tx_tspec->time_slice_start = now;
1674
1675 if (tx_tspec->downgraded)
1676 tx_tspec->action =
1677 TX_TSPEC_ACTION_STOP_DOWNGRADE;
1678 }
1679
1680 switch (tx_tspec->action) {
1681 case TX_TSPEC_ACTION_STOP_DOWNGRADE:
1682 /* take the original parameters */
1683 if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac]))
1684 sdata_err(sdata,
1685 "failed to set TX queue parameters for queue %d\n",
1686 ac);
1687 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1688 tx_tspec->downgraded = false;
1689 ret = true;
1690 break;
1691 case TX_TSPEC_ACTION_DOWNGRADE:
1692 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
1693 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1694 ret = true;
1695 break;
1696 }
1697 /* downgrade next lower non-ACM AC */
1698 for (non_acm_ac = ac + 1;
1699 non_acm_ac < IEEE80211_NUM_ACS;
1700 non_acm_ac++)
1701 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
1702 break;
1703 /* The loop will result in using BK even if it requires
1704 * admission control, such configuration makes no sense
1705 * and we have to transmit somehow - the AC selection
1706 * does the same thing.
1707 */
1708 if (drv_conf_tx(local, sdata, ac,
1709 &sdata->tx_conf[non_acm_ac]))
1710 sdata_err(sdata,
1711 "failed to set TX queue parameters for queue %d\n",
1712 ac);
1713 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1714 ret = true;
1715 schedule_delayed_work(&ifmgd->tx_tspec_wk,
1716 tx_tspec->time_slice_start + HZ - now + 1);
1717 break;
1718 case TX_TSPEC_ACTION_NONE:
1719 /* nothing now */
1720 break;
1721 }
1722 }
1723
1724 return ret;
1725}
1726
1727void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1728{
1729 if (__ieee80211_sta_handle_tspec_ac_params(sdata))
1730 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1731}
1732
1733static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
1734{
1735 struct ieee80211_sub_if_data *sdata;
1736
1737 sdata = container_of(work, struct ieee80211_sub_if_data,
1738 u.mgd.tx_tspec_wk.work);
1739 ieee80211_sta_handle_tspec_ac_params(sdata);
1740}
1741
60f8b39c 1742/* MLME */
7d25745d 1743static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
4ced3f74 1744 struct ieee80211_sub_if_data *sdata,
4a3cb702 1745 const u8 *wmm_param, size_t wmm_param_len)
f0706e82 1746{
f0706e82 1747 struct ieee80211_tx_queue_params params;
4ced3f74 1748 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1749 size_t left;
1750 int count;
4a3cb702
JB		 1751 const u8 *pos;
1752 u8 uapsd_queues = 0;
f0706e82 1753
e1b3ec1a 1754 if (!local->ops->conf_tx)
7d25745d 1755 return false;
e1b3ec1a 1756
32c5057b 1757 if (local->hw.queues < IEEE80211_NUM_ACS)
7d25745d 1758 return false;
3434fbd3
JB		 1759
1760 if (!wmm_param)
7d25745d 1761 return false;
3434fbd3 1762
f0706e82 1763 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
7d25745d 1764 return false;
ab13315a
KV		 1765
1766 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
dc41e4d4 1767 uapsd_queues = ifmgd->uapsd_queues;
ab13315a 1768
f0706e82 1769 count = wmm_param[6] & 0x0f;
46900298 1770 if (count == ifmgd->wmm_last_param_set)
7d25745d 1771 return false;
46900298 1772 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 1773
1774 pos = wmm_param + 8;
1775 left = wmm_param_len - 8;
1776
1777 memset(&params, 0, sizeof(params));
1778
00e96dec 1779 sdata->wmm_acm = 0;
f0706e82
JB		 1780 for (; left >= 4; left -= 4, pos += 4) {
1781 int aci = (pos[0] >> 5) & 0x03;
1782 int acm = (pos[0] >> 4) & 0x01;
ab13315a 1783 bool uapsd = false;
f0706e82
JB		 1784 int queue;
1785
1786 switch (aci) {
0eeb59fe 1787 case 1: /* AC_BK */
e100bb64 1788 queue = 3;
988c0f72 1789 if (acm)
00e96dec 1790 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV		 1791 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1792 uapsd = true;
f0706e82 1793 break;
0eeb59fe 1794 case 2: /* AC_VI */
e100bb64 1795 queue = 1;
988c0f72 1796 if (acm)
00e96dec 1797 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV		 1798 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1799 uapsd = true;
f0706e82 1800 break;
0eeb59fe 1801 case 3: /* AC_VO */
e100bb64 1802 queue = 0;
988c0f72 1803 if (acm)
00e96dec 1804 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV		 1805 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1806 uapsd = true;
f0706e82 1807 break;
0eeb59fe 1808 case 0: /* AC_BE */
f0706e82 1809 default:
e100bb64 1810 queue = 2;
988c0f72 1811 if (acm)
00e96dec 1812 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV		 1813 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1814 uapsd = true;
f0706e82
JB		 1815 break;
1816 }
1817
1818 params.aifs = pos[0] & 0x0f;
1819 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1820 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 1821 params.txop = get_unaligned_le16(pos + 2);
908f8d07 1822 params.acm = acm;
ab13315a
KV		 1823 params.uapsd = uapsd;
1824
bdcbd8e0 1825 mlme_dbg(sdata,
02219b3a 1826 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
bdcbd8e0
JB		 1827 queue, aci, acm,
1828 params.aifs, params.cw_min, params.cw_max,
02219b3a
JB		 1829 params.txop, params.uapsd,
1830 ifmgd->tx_tspec[queue].downgraded);
f6f3def3 1831 sdata->tx_conf[queue] = params;
02219b3a
JB		 1832 if (!ifmgd->tx_tspec[queue].downgraded &&
1833 drv_conf_tx(local, sdata, queue, &params))
bdcbd8e0
JB		 1834 sdata_err(sdata,
1835 "failed to set TX queue parameters for queue %d\n",
1836 queue);
f0706e82 1837 }
e1b3ec1a
SG		 1838
1839 /* enable WMM or activate new settings */
4ced3f74 1840 sdata->vif.bss_conf.qos = true;
7d25745d 1841 return true;
f0706e82
JB		 1842}
1843
925e64c3
SG		 1844static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1845{
1846 lockdep_assert_held(&sdata->local->mtx);
1847
392b9ffb 1848 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
925e64c3
SG		 1849 ieee80211_run_deferred_scan(sdata->local);
1850}
1851
1852static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1853{
1854 mutex_lock(&sdata->local->mtx);
1855 __ieee80211_stop_poll(sdata);
1856 mutex_unlock(&sdata->local->mtx);
1857}
1858
7a5158ef
JB		 1859static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1860 u16 capab, bool erp_valid, u8 erp)
5628221c 1861{
bda3933a 1862 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 1863 u32 changed = 0;
7a5158ef
JB		 1864 bool use_protection;
1865 bool use_short_preamble;
1866 bool use_short_slot;
1867
1868 if (erp_valid) {
1869 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1870 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1871 } else {
1872 use_protection = false;
1873 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1874 }
1875
1876 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
55de908a 1877 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
43d35343 1878 use_short_slot = true;
5628221c 1879
471b3efd 1880 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 1881 bss_conf->use_cts_prot = use_protection;
1882 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 1883 }
7e9ed188 1884
d43c7b37 1885 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 1886 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 1887 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 1888 }
d9430a32 1889
7a5158ef 1890 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 1891 bss_conf->use_short_slot = use_short_slot;
1892 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 1893 }
1894
1895 return changed;
1896}
1897
f698d856 1898static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 1899 struct cfg80211_bss *cbss,
ae5eb026 1900 u32 bss_info_changed)
f0706e82 1901{
0c1ad2ca 1902 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 1903 struct ieee80211_local *local = sdata->local;
68542962 1904 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
d6f2da5b 1905
ae5eb026 1906 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 1907 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
50ae34a2 1908 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 1909
7ccc8bd7 1910 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
59c1ec2b 1911 beacon_loss_count * bss_conf->beacon_int));
7ccc8bd7 1912
0c1ad2ca
JB		 1913 sdata->u.mgd.associated = cbss;
1914 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 1915
17e4ec14
JM		 1916 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1917
488dd7b5 1918 if (sdata->vif.p2p) {
9caf0364 1919 const struct cfg80211_bss_ies *ies;
488dd7b5 1920
9caf0364
JB		 1921 rcu_read_lock();
1922 ies = rcu_dereference(cbss->ies);
1923 if (ies) {
9caf0364
JB		 1924 int ret;
1925
1926 ret = cfg80211_get_p2p_attr(
1927 ies->data, ies->len,
1928 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
67baf663
JD		 1929 (u8 *) &bss_conf->p2p_noa_attr,
1930 sizeof(bss_conf->p2p_noa_attr));
9caf0364 1931 if (ret >= 2) {
67baf663
JD		 1932 sdata->u.mgd.p2p_noa_index =
1933 bss_conf->p2p_noa_attr.index;
9caf0364 1934 bss_info_changed |= BSS_CHANGED_P2P_PS;
9caf0364 1935 }
488dd7b5 1936 }
9caf0364 1937 rcu_read_unlock();
488dd7b5
JB		 1938 }
1939
b291ba11 1940 /* just to be sure */
925e64c3 1941 ieee80211_stop_poll(sdata);
b291ba11 1942
9ac19a90 1943 ieee80211_led_assoc(local, 1);
9306102e 1944
989c6505 1945 if (sdata->u.mgd.have_beacon) {
826262c3
JB		 1946 /*
1947 * If the AP is buggy we may get here with no DTIM period
1948 * known, so assume it's 1 which is the only safe assumption
1949 * in that case, although if the TIM IE is broken powersave
1950 * probably just won't work at all.
1951 */
1952 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
817cee76 1953 bss_conf->beacon_rate = bss->beacon_rate;
989c6505 1954 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
826262c3 1955 } else {
817cee76 1956 bss_conf->beacon_rate = NULL;
e5b900d2 1957 bss_conf->dtim_period = 0;
826262c3 1958 }
e5b900d2 1959
68542962 1960 bss_conf->assoc = 1;
9cef8737 1961
a97c13c3 1962 /* Tell the driver to monitor connection quality (if supported) */
ea086359 1963 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
68542962 1964 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 1965 bss_info_changed |= BSS_CHANGED_CQM;
1966
68542962 1967 /* Enable ARP filtering */
0f19b41e 1968 if (bss_conf->arp_addr_cnt)
68542962 1969 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
68542962 1970
ae5eb026 1971 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 1972
056508dc 1973 mutex_lock(&local->iflist_mtx);
4a733ef1 1974 ieee80211_recalc_ps(local);
056508dc 1975 mutex_unlock(&local->iflist_mtx);
e0cb686f 1976
04ecd257 1977 ieee80211_recalc_smps(sdata);
ab095877
EP		 1978 ieee80211_recalc_ps_vif(sdata);
1979
9ac19a90 1980 netif_carrier_on(sdata->dev);
f0706e82
JB		 1981}
1982
e69e95db 1983static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
37ad3888
JB		 1984 u16 stype, u16 reason, bool tx,
1985 u8 *frame_buf)
aa458d17 1986{
46900298 1987 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17 1988 struct ieee80211_local *local = sdata->local;
3cc5240b 1989 u32 changed = 0;
aa458d17 1990
8d61ffa5 1991 sdata_assert_lock(sdata);
77fdaa12 1992
37ad3888
JB		 1993 if (WARN_ON_ONCE(tx && !frame_buf))
1994 return;
1995
b291ba11
JB		 1996 if (WARN_ON(!ifmgd->associated))
1997 return;
1998
79543d8e
DS		 1999 ieee80211_stop_poll(sdata);
2000
77fdaa12 2001 ifmgd->associated = NULL;
aa458d17
TW		 2002 netif_carrier_off(sdata->dev);
2003
88bc40e8
EP		 2004 /*
2005 * if we want to get out of ps before disassoc (why?) we have
2006 * to do it before sending disassoc, as otherwise the null-packet
2007 * won't be valid.
2008 */
2009 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2010 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2011 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2012 }
2013 local->ps_sdata = NULL;
2014
ab095877
EP		 2015 /* disable per-vif ps */
2016 ieee80211_recalc_ps_vif(sdata);
2017
14f2ae83
EG		 2018 /* make sure ongoing transmission finishes */
2019 synchronize_net();
2020
3b24f4c6
EG		 2021 /*
2022 * drop any frame before deauth/disassoc, this can be data or
2023 * management frame. Since we are disconnecting, we should not
2024 * insist sending these frames which can take time and delay
2025 * the disconnection and possible the roaming.
2026 */
f823981e 2027 if (tx)
3b24f4c6 2028 ieee80211_flush_queues(local, sdata, true);
f823981e 2029
37ad3888
JB		 2030 /* deauthenticate/disassociate now */
2031 if (tx || frame_buf)
88a9e31c
EP		 2032 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
2033 reason, tx, frame_buf);
37ad3888 2034
3b24f4c6 2035 /* flush out frame - make sure the deauth was actually sent */
37ad3888 2036 if (tx)
3b24f4c6 2037 ieee80211_flush_queues(local, sdata, false);
37ad3888 2038
88a9e31c 2039 /* clear bssid only after building the needed mgmt frames */
c84a67a2 2040 eth_zero_addr(ifmgd->bssid);
88a9e31c 2041
37ad3888 2042 /* remove AP and TDLS peers */
d34ba216 2043 sta_info_flush(sdata);
37ad3888
JB		 2044
2045 /* finally reset all BSS / config parameters */
f5e5bf25
TW		 2046 changed |= ieee80211_reset_erp_info(sdata);
2047
f5e5bf25 2048 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 2049 changed |= BSS_CHANGED_ASSOC;
2050 sdata->vif.bss_conf.assoc = false;
f5e5bf25 2051
67baf663
JD		 2052 ifmgd->p2p_noa_index = -1;
2053 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
2054 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
488dd7b5 2055
dd5ecfea 2056 /* on the next assoc, re-program HT/VHT parameters */
ef96a842
BG		 2057 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
2058 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
dd5ecfea
JB		 2059 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
2060 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
322cd406 2061 sdata->flags &= ~IEEE80211_SDATA_MU_MIMO_OWNER;
413ad50a 2062
1ea6f9c0 2063 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
a8302de9 2064
520eb820
KV		 2065 del_timer_sync(&local->dynamic_ps_timer);
2066 cancel_work_sync(&local->dynamic_ps_enable_work);
2067
68542962 2068 /* Disable ARP filtering */
0f19b41e 2069 if (sdata->vif.bss_conf.arp_addr_cnt)
68542962 2070 changed |= BSS_CHANGED_ARP_FILTER;
68542962 2071
3abead59
JB		 2072 sdata->vif.bss_conf.qos = false;
2073 changed |= BSS_CHANGED_QOS;
2074
0aaffa9b
JB		 2075 /* The BSSID (not really interesting) and HT changed */
2076 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 2077 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 2078
3abead59
JB		 2079 /* disassociated - set to defaults now */
2080 ieee80211_set_wmm_default(sdata, false);
2081
b9dcf712
JB		 2082 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
2083 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
2084 del_timer_sync(&sdata->u.mgd.timer);
2085 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2d9957cc 2086
826262c3 2087 sdata->vif.bss_conf.dtim_period = 0;
817cee76
AB		 2088 sdata->vif.bss_conf.beacon_rate = NULL;
2089
989c6505 2090 ifmgd->have_beacon = false;
826262c3 2091
028e8da0 2092 ifmgd->flags = 0;
34a3740d 2093 mutex_lock(&local->mtx);
028e8da0 2094 ieee80211_vif_release_channel(sdata);
59af6928
MK		 2095
2096 sdata->vif.csa_active = false;
0c21e632 2097 ifmgd->csa_waiting_bcn = false;
f84eaa10 2098 ifmgd->csa_ignored_same_chan = false;
a46992b4
LC		 2099 if (sdata->csa_block_tx) {
2100 ieee80211_wake_vif_queues(local, sdata,
2101 IEEE80211_QUEUE_STOP_REASON_CSA);
2102 sdata->csa_block_tx = false;
2103 }
34a3740d 2104 mutex_unlock(&local->mtx);
2475b1cc 2105
02219b3a
JB		 2106 /* existing TX TSPEC sessions no longer exist */
2107 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
2108 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
2109
2475b1cc 2110 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
aa458d17 2111}
f0706e82 2112
3cf335d5
KV		 2113void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
2114 struct ieee80211_hdr *hdr)
2115{
2116 /*
2117 * We can postpone the mgd.timer whenever receiving unicast frames
2118 * from AP because we know that the connection is working both ways
2119 * at that time. But multicast frames (and hence also beacons) must
2120 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 2121 * data idle periods for sending the periodic probe request to the
2122 * AP we're connected to.
3cf335d5 2123 */
b291ba11
JB		 2124 if (is_multicast_ether_addr(hdr->addr1))
2125 return;
2126
be099e82 2127 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 2128}
f0706e82 2129
4e5ff376
FF		 2130static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
2131{
2132 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
133d40f9 2133 struct ieee80211_local *local = sdata->local;
4e5ff376 2134
133d40f9 2135 mutex_lock(&local->mtx);
392b9ffb
SG		 2136 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
2137 goto out;
4e5ff376 2138
925e64c3 2139 __ieee80211_stop_poll(sdata);
133d40f9
SG		 2140
2141 mutex_lock(&local->iflist_mtx);
4a733ef1 2142 ieee80211_recalc_ps(local);
133d40f9 2143 mutex_unlock(&local->iflist_mtx);
4e5ff376 2144
30686bf7 2145 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
133d40f9 2146 goto out;
4e5ff376
FF		 2147
2148 /*
2149 * We've received a probe response, but are not sure whether
2150 * we have or will be receiving any beacons or data, so let's
2151 * schedule the timers again, just in case.
2152 */
2153 ieee80211_sta_reset_beacon_monitor(sdata);
2154
2155 mod_timer(&ifmgd->conn_mon_timer,
2156 round_jiffies_up(jiffies +
2157 IEEE80211_CONNECTION_IDLE_TIME));
133d40f9 2158out:
133d40f9 2159 mutex_unlock(&local->mtx);
4e5ff376
FF		 2160}
2161
02219b3a
JB		 2162static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
2163 struct ieee80211_hdr *hdr,
2164 u16 tx_time)
2165{
2166 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2167 u16 tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
2168 int ac = ieee80211_ac_from_tid(tid);
2169 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
2170 unsigned long now = jiffies;
2171
2172 if (likely(!tx_tspec->admitted_time))
2173 return;
2174
2175 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2176 tx_tspec->consumed_tx_time = 0;
2177 tx_tspec->time_slice_start = now;
2178
2179 if (tx_tspec->downgraded) {
2180 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
2181 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2182 }
2183 }
2184
2185 if (tx_tspec->downgraded)
2186 return;
2187
2188 tx_tspec->consumed_tx_time += tx_time;
2189
2190 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
2191 tx_tspec->downgraded = true;
2192 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
2193 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2194 }
2195}
2196
4e5ff376 2197void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
02219b3a 2198 struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
4e5ff376 2199{
02219b3a
JB		 2200 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
2201
75706d0e 2202 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF		 2203 return;
2204
4e5ff376
FF		 2205 if (ieee80211_is_nullfunc(hdr->frame_control) &&
2206 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e 2207 if (ack)
cab1c7fd 2208 ieee80211_sta_reset_conn_monitor(sdata);
04ac3c0e
FF		 2209 else
2210 sdata->u.mgd.nullfunc_failed = true;
4e5ff376 2211 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
cab1c7fd 2212 return;
4e5ff376 2213 }
cab1c7fd
WD		 2214
2215 if (ack)
2216 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF		 2217}
2218
a43abf29
ML		 2219static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2220{
2221 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2222 const u8 *ssid;
f01a067d 2223 u8 *dst = ifmgd->associated->bssid;
180205bd 2224 u8 unicast_limit = max(1, max_probe_tries - 3);
f01a067d
LR		 2225
2226 /*
2227 * Try sending broadcast probe requests for the last three
2228 * probe requests after the first ones failed since some
2229 * buggy APs only support broadcast probe requests.
2230 */
2231 if (ifmgd->probe_send_count >= unicast_limit)
2232 dst = NULL;
a43abf29 2233
4e5ff376
FF		 2234 /*
2235 * When the hardware reports an accurate Tx ACK status, it's
2236 * better to send a nullfunc frame instead of a probe request,
2237 * as it will kick us off the AP quickly if we aren't associated
2238 * anymore. The timeout will be reset if the frame is ACKed by
2239 * the AP.
2240 */
992e68bf
SD		 2241 ifmgd->probe_send_count++;
2242
30686bf7 2243 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) {
04ac3c0e 2244 ifmgd->nullfunc_failed = false;
076cdcb1 2245 ieee80211_send_nullfunc(sdata->local, sdata, false);
04ac3c0e 2246 } else {
88c868c4
SG		 2247 int ssid_len;
2248
9caf0364 2249 rcu_read_lock();
4e5ff376 2250 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
88c868c4
SG		 2251 if (WARN_ON_ONCE(ssid == NULL))
2252 ssid_len = 0;
2253 else
2254 ssid_len = ssid[1];
2255
a73f8e21 2256 ieee80211_send_probe_req(sdata, sdata->vif.addr, dst,
a344d677 2257 ssid + 2, ssid_len, NULL,
1672c0e3 2258 0, (u32) -1, true, 0,
55de908a 2259 ifmgd->associated->channel, false);
9caf0364 2260 rcu_read_unlock();
4e5ff376 2261 }
a43abf29 2262
180205bd 2263 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
8d61ffa5 2264 run_again(sdata, ifmgd->probe_timeout);
a43abf29
ML		 2265}
2266
b291ba11
JB		 2267static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2268 bool beacon)
04de8381 2269{
04de8381 2270 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 2271 bool already = false;
34bfc411 2272
9607e6b6 2273 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 2274 return;
2275
8d61ffa5 2276 sdata_lock(sdata);
77fdaa12
JB		 2277
2278 if (!ifmgd->associated)
2279 goto out;
2280
133d40f9
SG		 2281 mutex_lock(&sdata->local->mtx);
2282
2283 if (sdata->local->tmp_channel || sdata->local->scanning) {
2284 mutex_unlock(&sdata->local->mtx);
2285 goto out;
2286 }
2287
a13fbe54 2288 if (beacon) {
bdcbd8e0 2289 mlme_dbg_ratelimited(sdata,
59c1ec2b
BG		 2290 "detected beacon loss from AP (missed %d beacons) - probing\n",
2291 beacon_loss_count);
bdcbd8e0 2292
98f03342 2293 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
a13fbe54 2294 }
04de8381 2295
b291ba11
JB		 2296 /*
2297 * The driver/our work has already reported this event or the
2298 * connection monitoring has kicked in and we have already sent
2299 * a probe request. Or maybe the AP died and the driver keeps
2300 * reporting until we disassociate...
2301 *
2302 * In either case we have to ignore the current call to this
2303 * function (except for setting the correct probe reason bit)
2304 * because otherwise we would reset the timer every time and
2305 * never check whether we received a probe response!
2306 */
392b9ffb 2307 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
b291ba11
JB		 2308 already = true;
2309
12b5f34d
EP		 2310 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2311
133d40f9
SG		 2312 mutex_unlock(&sdata->local->mtx);
2313
b291ba11
JB		 2314 if (already)
2315 goto out;
2316
4e751843 2317 mutex_lock(&sdata->local->iflist_mtx);
4a733ef1 2318 ieee80211_recalc_ps(sdata->local);
4e751843
JB		 2319 mutex_unlock(&sdata->local->iflist_mtx);
2320
a43abf29
ML		 2321 ifmgd->probe_send_count = 0;
2322 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12 2323 out:
8d61ffa5 2324 sdata_unlock(sdata);
04de8381
KV		 2325}
2326
a619a4c0
JO		 2327struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2328 struct ieee80211_vif *vif)
2329{
2330 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2331 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d9b3b28b 2332 struct cfg80211_bss *cbss;
a619a4c0
JO		 2333 struct sk_buff *skb;
2334 const u8 *ssid;
88c868c4 2335 int ssid_len;
a619a4c0
JO		 2336
2337 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2338 return NULL;
2339
8d61ffa5 2340 sdata_assert_lock(sdata);
a619a4c0 2341
d9b3b28b
EP		 2342 if (ifmgd->associated)
2343 cbss = ifmgd->associated;
2344 else if (ifmgd->auth_data)
2345 cbss = ifmgd->auth_data->bss;
2346 else if (ifmgd->assoc_data)
2347 cbss = ifmgd->assoc_data->bss;
2348 else
a619a4c0
JO		 2349 return NULL;
2350
9caf0364 2351 rcu_read_lock();
d9b3b28b 2352 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
88c868c4
SG		 2353 if (WARN_ON_ONCE(ssid == NULL))
2354 ssid_len = 0;
2355 else
2356 ssid_len = ssid[1];
2357
a344d677 2358 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
55de908a 2359 (u32) -1, cbss->channel,
6b77863b 2360 ssid + 2, ssid_len,
85a237fe 2361 NULL, 0, true);
9caf0364 2362 rcu_read_unlock();
a619a4c0
JO		 2363
2364 return skb;
2365}
2366EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2367
a90faa9d
EG		 2368static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata,
2369 const u8 *buf, size_t len, bool tx,
2370 u16 reason)
2371{
2372 struct ieee80211_event event = {
2373 .type = MLME_EVENT,
2374 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT,
2375 .u.mlme.reason = reason,
2376 };
2377
2378 if (tx)
2379 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len);
2380 else
2381 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len);
2382
2383 drv_event_callback(sdata->local, sdata, &event);
2384}
2385
eef9e54c 2386static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
1e4dcd01 2387{
59af6928 2388 struct ieee80211_local *local = sdata->local;
1e4dcd01 2389 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 2390 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
1e4dcd01 2391
8d61ffa5 2392 sdata_lock(sdata);
1e4dcd01 2393 if (!ifmgd->associated) {
8d61ffa5 2394 sdata_unlock(sdata);
1e4dcd01
JO		 2395 return;
2396 }
2397
37ad3888
JB		 2398 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2399 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
eef9e54c 2400 true, frame_buf);
59af6928 2401 mutex_lock(&local->mtx);
7578d575 2402 sdata->vif.csa_active = false;
0c21e632 2403 ifmgd->csa_waiting_bcn = false;
a46992b4
LC		 2404 if (sdata->csa_block_tx) {
2405 ieee80211_wake_vif_queues(local, sdata,
2406 IEEE80211_QUEUE_STOP_REASON_CSA);
2407 sdata->csa_block_tx = false;
2408 }
59af6928 2409 mutex_unlock(&local->mtx);
7da7cc1d 2410
a90faa9d
EG		 2411 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
2412 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2413
8d61ffa5 2414 sdata_unlock(sdata);
1e4dcd01
JO		 2415}
2416
cc74c0c7 2417static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 2418{
2419 struct ieee80211_sub_if_data *sdata =
2420 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 2421 u.mgd.beacon_connection_loss_work);
a85e1d55
PS		 2422 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2423 struct sta_info *sta;
2424
2425 if (ifmgd->associated) {
30fa9047 2426 rcu_read_lock();
a85e1d55
PS		 2427 sta = sta_info_get(sdata, ifmgd->bssid);
2428 if (sta)
2429 sta->beacon_loss_count++;
30fa9047 2430 rcu_read_unlock();
a85e1d55 2431 }
b291ba11 2432
682bd38b 2433 if (ifmgd->connection_loss) {
882a7c69
JB		 2434 sdata_info(sdata, "Connection to AP %pM lost\n",
2435 ifmgd->bssid);
eef9e54c 2436 __ieee80211_disconnect(sdata);
882a7c69 2437 } else {
1e4dcd01 2438 ieee80211_mgd_probe_ap(sdata, true);
882a7c69
JB		 2439 }
2440}
2441
2442static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2443{
2444 struct ieee80211_sub_if_data *sdata =
2445 container_of(work, struct ieee80211_sub_if_data,
2446 u.mgd.csa_connection_drop_work);
2447
eef9e54c 2448 __ieee80211_disconnect(sdata);
b291ba11
JB		 2449}
2450
04de8381
KV		 2451void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2452{
2453 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 2454 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 2455
b5878a2d
JB		 2456 trace_api_beacon_loss(sdata);
2457
682bd38b 2458 sdata->u.mgd.connection_loss = false;
1e4dcd01 2459 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 2460}
2461EXPORT_SYMBOL(ieee80211_beacon_loss);
2462
1e4dcd01
JO		 2463void ieee80211_connection_loss(struct ieee80211_vif *vif)
2464{
2465 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2466 struct ieee80211_hw *hw = &sdata->local->hw;
2467
b5878a2d
JB		 2468 trace_api_connection_loss(sdata);
2469
682bd38b 2470 sdata->u.mgd.connection_loss = true;
1e4dcd01
JO		 2471 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2472}
2473EXPORT_SYMBOL(ieee80211_connection_loss);
2474
2475
66e67e41
JB		 2476static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2477 bool assoc)
2478{
2479 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2480
8d61ffa5 2481 sdata_assert_lock(sdata);
66e67e41 2482
66e67e41 2483 if (!assoc) {
c1e140bf
EG		 2484 /*
2485 * we are not authenticated yet, the only timer that could be
2486 * running is the timeout for the authentication response which
2487 * which is not relevant anymore.
2488 */
2489 del_timer_sync(&sdata->u.mgd.timer);
66e67e41
JB		 2490 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2491
c84a67a2 2492 eth_zero_addr(sdata->u.mgd.bssid);
66e67e41 2493 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
028e8da0 2494 sdata->u.mgd.flags = 0;
34a3740d 2495 mutex_lock(&sdata->local->mtx);
55de908a 2496 ieee80211_vif_release_channel(sdata);
34a3740d 2497 mutex_unlock(&sdata->local->mtx);
66e67e41
JB		 2498 }
2499
5b112d3d 2500 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
66e67e41
JB		 2501 kfree(auth_data);
2502 sdata->u.mgd.auth_data = NULL;
2503}
2504
c9c99f89
JB		 2505static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2506 bool assoc)
2507{
2508 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2509
2510 sdata_assert_lock(sdata);
2511
2512 if (!assoc) {
2513 /*
2514 * we are not associated yet, the only timer that could be
2515 * running is the timeout for the association response which
2516 * which is not relevant anymore.
2517 */
2518 del_timer_sync(&sdata->u.mgd.timer);
2519 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2520
2521 eth_zero_addr(sdata->u.mgd.bssid);
2522 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2523 sdata->u.mgd.flags = 0;
322cd406 2524 sdata->flags &= ~IEEE80211_SDATA_MU_MIMO_OWNER;
c9c99f89
JB		 2525 mutex_lock(&sdata->local->mtx);
2526 ieee80211_vif_release_channel(sdata);
2527 mutex_unlock(&sdata->local->mtx);
2528 }
2529
2530 kfree(assoc_data);
2531 sdata->u.mgd.assoc_data = NULL;
2532}
2533
66e67e41
JB		 2534static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2535 struct ieee80211_mgmt *mgmt, size_t len)
2536{
1672c0e3 2537 struct ieee80211_local *local = sdata->local;
66e67e41
JB		 2538 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2539 u8 *pos;
2540 struct ieee802_11_elems elems;
1672c0e3 2541 u32 tx_flags = 0;
66e67e41
JB		 2542
2543 pos = mgmt->u.auth.variable;
b2e506bf 2544 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
66e67e41
JB		 2545 if (!elems.challenge)
2546 return;
2547 auth_data->expected_transaction = 4;
a1845fc7 2548 drv_mgd_prepare_tx(sdata->local, sdata);
30686bf7 2549 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1672c0e3
JB		 2550 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2551 IEEE80211_TX_INTFL_MLME_CONN_TX;
700e8ea6 2552 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
66e67e41
JB		 2553 elems.challenge - 2, elems.challenge_len + 2,
2554 auth_data->bss->bssid, auth_data->bss->bssid,
2555 auth_data->key, auth_data->key_len,
1672c0e3 2556 auth_data->key_idx, tx_flags);
66e67e41
JB		 2557}
2558
8d61ffa5
JB		 2559static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2560 struct ieee80211_mgmt *mgmt, size_t len)
66e67e41
JB		 2561{
2562 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2563 u8 bssid[ETH_ALEN];
2564 u16 auth_alg, auth_transaction, status_code;
2565 struct sta_info *sta;
a9409093
EG		 2566 struct ieee80211_event event = {
2567 .type = MLME_EVENT,
2568 .u.mlme.data = AUTH_EVENT,
2569 };
66e67e41 2570
8d61ffa5 2571 sdata_assert_lock(sdata);
66e67e41
JB		 2572
2573 if (len < 24 + 6)
8d61ffa5 2574 return;
66e67e41
JB		 2575
2576 if (!ifmgd->auth_data || ifmgd->auth_data->done)
8d61ffa5 2577 return;
66e67e41
JB		 2578
2579 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2580
b203ca39 2581 if (!ether_addr_equal(bssid, mgmt->bssid))
8d61ffa5 2582 return;
66e67e41
JB		 2583
2584 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2585 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2586 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2587
2588 if (auth_alg != ifmgd->auth_data->algorithm ||
0f4126e8
JM		 2589 auth_transaction != ifmgd->auth_data->expected_transaction) {
2590 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2591 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2592 auth_transaction,
2593 ifmgd->auth_data->expected_transaction);
8d61ffa5 2594 return;
0f4126e8 2595 }
66e67e41
JB		 2596
2597 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2598 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2599 mgmt->sa, status_code);
dac211ec 2600 ieee80211_destroy_auth_data(sdata, false);
6ff57cf8 2601 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
a9409093
EG		 2602 event.u.mlme.status = MLME_DENIED;
2603 event.u.mlme.reason = status_code;
2604 drv_event_callback(sdata->local, sdata, &event);
8d61ffa5 2605 return;
66e67e41
JB		 2606 }
2607
2608 switch (ifmgd->auth_data->algorithm) {
2609 case WLAN_AUTH_OPEN:
2610 case WLAN_AUTH_LEAP:
2611 case WLAN_AUTH_FT:
6b8ece3a 2612 case WLAN_AUTH_SAE:
66e67e41
JB		 2613 break;
2614 case WLAN_AUTH_SHARED_KEY:
2615 if (ifmgd->auth_data->expected_transaction != 4) {
2616 ieee80211_auth_challenge(sdata, mgmt, len);
2617 /* need another frame */
8d61ffa5 2618 return;
66e67e41
JB		 2619 }
2620 break;
2621 default:
2622 WARN_ONCE(1, "invalid auth alg %d",
2623 ifmgd->auth_data->algorithm);
8d61ffa5 2624 return;
66e67e41
JB		 2625 }
2626
a9409093
EG		 2627 event.u.mlme.status = MLME_SUCCESS;
2628 drv_event_callback(sdata->local, sdata, &event);
bdcbd8e0 2629 sdata_info(sdata, "authenticated\n");
66e67e41
JB		 2630 ifmgd->auth_data->done = true;
2631 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
89afe614 2632 ifmgd->auth_data->timeout_started = true;
8d61ffa5 2633 run_again(sdata, ifmgd->auth_data->timeout);
66e67e41 2634
6b8ece3a
JM		 2635 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2636 ifmgd->auth_data->expected_transaction != 2) {
2637 /*
2638 * Report auth frame to user space for processing since another
2639 * round of Authentication frames is still needed.
2640 */
6ff57cf8 2641 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
8d61ffa5 2642 return;
6b8ece3a
JM		 2643 }
2644
66e67e41
JB		 2645 /* move station state to auth */
2646 mutex_lock(&sdata->local->sta_mtx);
2647 sta = sta_info_get(sdata, bssid);
2648 if (!sta) {
2649 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2650 goto out_err;
2651 }
2652 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
bdcbd8e0 2653 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
66e67e41
JB		 2654 goto out_err;
2655 }
2656 mutex_unlock(&sdata->local->sta_mtx);
2657
6ff57cf8 2658 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
8d61ffa5 2659 return;
66e67e41
JB		 2660 out_err:
2661 mutex_unlock(&sdata->local->sta_mtx);
2662 /* ignore frame -- wait for timeout */
66e67e41
JB		 2663}
2664
dfa1ad29
CO		 2665#define case_WLAN(type) \
2666 case WLAN_REASON_##type: return #type
2667
2668static const char *ieee80211_get_reason_code_string(u16 reason_code)
2669{
2670 switch (reason_code) {
2671 case_WLAN(UNSPECIFIED);
2672 case_WLAN(PREV_AUTH_NOT_VALID);
2673 case_WLAN(DEAUTH_LEAVING);
2674 case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2675 case_WLAN(DISASSOC_AP_BUSY);
2676 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2677 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2678 case_WLAN(DISASSOC_STA_HAS_LEFT);
2679 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2680 case_WLAN(DISASSOC_BAD_POWER);
2681 case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2682 case_WLAN(INVALID_IE);
2683 case_WLAN(MIC_FAILURE);
2684 case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2685 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2686 case_WLAN(IE_DIFFERENT);
2687 case_WLAN(INVALID_GROUP_CIPHER);
2688 case_WLAN(INVALID_PAIRWISE_CIPHER);
2689 case_WLAN(INVALID_AKMP);
2690 case_WLAN(UNSUPP_RSN_VERSION);
2691 case_WLAN(INVALID_RSN_IE_CAP);
2692 case_WLAN(IEEE8021X_FAILED);
2693 case_WLAN(CIPHER_SUITE_REJECTED);
2694 case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2695 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2696 case_WLAN(DISASSOC_LOW_ACK);
2697 case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2698 case_WLAN(QSTA_LEAVE_QBSS);
2699 case_WLAN(QSTA_NOT_USE);
2700 case_WLAN(QSTA_REQUIRE_SETUP);
2701 case_WLAN(QSTA_TIMEOUT);
2702 case_WLAN(QSTA_CIPHER_NOT_SUPP);
2703 case_WLAN(MESH_PEER_CANCELED);
2704 case_WLAN(MESH_MAX_PEERS);
2705 case_WLAN(MESH_CONFIG);
2706 case_WLAN(MESH_CLOSE);
2707 case_WLAN(MESH_MAX_RETRIES);
2708 case_WLAN(MESH_CONFIRM_TIMEOUT);
2709 case_WLAN(MESH_INVALID_GTK);
2710 case_WLAN(MESH_INCONSISTENT_PARAM);
2711 case_WLAN(MESH_INVALID_SECURITY);
2712 case_WLAN(MESH_PATH_ERROR);
2713 case_WLAN(MESH_PATH_NOFORWARD);
2714 case_WLAN(MESH_PATH_DEST_UNREACHABLE);
2715 case_WLAN(MAC_EXISTS_IN_MBSS);
2716 case_WLAN(MESH_CHAN_REGULATORY);
2717 case_WLAN(MESH_CHAN);
2718 default: return "<unknown>";
2719 }
2720}
66e67e41 2721
8d61ffa5
JB		 2722static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2723 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2724{
46900298 2725 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
c9c99f89 2726 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
f0706e82 2727
8d61ffa5 2728 sdata_assert_lock(sdata);
66e67e41 2729
f4ea83dd 2730 if (len < 24 + 2)
8d61ffa5 2731 return;
f0706e82 2732
c9c99f89
JB		 2733 if (ifmgd->associated &&
2734 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) {
2735 const u8 *bssid = ifmgd->associated->bssid;
77fdaa12 2736
c9c99f89
JB		 2737 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
2738 bssid, reason_code,
2739 ieee80211_get_reason_code_string(reason_code));
f0706e82 2740
c9c99f89 2741 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
f0706e82 2742
c9c99f89
JB		 2743 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false,
2744 reason_code);
2745 return;
2746 }
77fdaa12 2747
c9c99f89
JB		 2748 if (ifmgd->assoc_data &&
2749 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
2750 const u8 *bssid = ifmgd->assoc_data->bss->bssid;
37ad3888 2751
c9c99f89
JB		 2752 sdata_info(sdata,
2753 "deauthenticated from %pM while associating (Reason: %u=%s)\n",
2754 bssid, reason_code,
2755 ieee80211_get_reason_code_string(reason_code));
2756
2757 ieee80211_destroy_assoc_data(sdata, false);
2758
2759 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2760 return;
2761 }
f0706e82
JB		 2762}
2763
2764
8d61ffa5
JB		 2765static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2766 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2767{
46900298 2768 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 2769 u16 reason_code;
2770
8d61ffa5 2771 sdata_assert_lock(sdata);
77fdaa12 2772
66e67e41 2773 if (len < 24 + 2)
8d61ffa5 2774 return;
77fdaa12 2775
66e67e41 2776 if (!ifmgd->associated ||
b203ca39 2777 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
8d61ffa5 2778 return;
f0706e82
JB		 2779
2780 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2781
bdcbd8e0
JB		 2782 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2783 mgmt->sa, reason_code);
f0706e82 2784
37ad3888
JB		 2785 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2786
a90faa9d 2787 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code);
f0706e82
JB		 2788}
2789
c74d084f
CL		 2790static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2791 u8 *supp_rates, unsigned int supp_rates_len,
2792 u32 *rates, u32 *basic_rates,
2793 bool *have_higher_than_11mbit,
2103dec1
SW		 2794 int *min_rate, int *min_rate_index,
2795 int shift, u32 rate_flags)
c74d084f
CL		 2796{
2797 int i, j;
2798
2799 for (i = 0; i < supp_rates_len; i++) {
2103dec1 2800 int rate = supp_rates[i] & 0x7f;
c74d084f
CL		 2801 bool is_basic = !!(supp_rates[i] & 0x80);
2802
2103dec1 2803 if ((rate * 5 * (1 << shift)) > 110)
c74d084f
CL		 2804 *have_higher_than_11mbit = true;
2805
2806 /*
2807 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2808 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2809 *
2810 * Note: Even through the membership selector and the basic
2811 * rate flag share the same bit, they are not exactly
2812 * the same.
2813 */
2814 if (!!(supp_rates[i] & 0x80) &&
2815 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2816 continue;
2817
2818 for (j = 0; j < sband->n_bitrates; j++) {
2103dec1
SW		 2819 struct ieee80211_rate *br;
2820 int brate;
2821
2822 br = &sband->bitrates[j];
2823 if ((rate_flags & br->flags) != rate_flags)
2824 continue;
2825
2826 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2827 if (brate == rate) {
c74d084f
CL		 2828 *rates |= BIT(j);
2829 if (is_basic)
2830 *basic_rates |= BIT(j);
2103dec1
SW		 2831 if ((rate * 5) < *min_rate) {
2832 *min_rate = rate * 5;
c74d084f
CL		 2833 *min_rate_index = j;
2834 }
2835 break;
2836 }
2837 }
2838 }
2839}
f0706e82 2840
66e67e41
JB		 2841static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2842 struct cfg80211_bss *cbss,
af6b6374 2843 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2844{
46900298 2845 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 2846 struct ieee80211_local *local = sdata->local;
8318d78a 2847 struct ieee80211_supported_band *sband;
f0706e82 2848 struct sta_info *sta;
af6b6374 2849 u8 *pos;
af6b6374 2850 u16 capab_info, aid;
f0706e82 2851 struct ieee802_11_elems elems;
bda3933a 2852 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
35d865af
JB		 2853 const struct cfg80211_bss_ies *bss_ies = NULL;
2854 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
ae5eb026 2855 u32 changed = 0;
c74d084f 2856 int err;
35d865af 2857 bool ret;
f0706e82 2858
af6b6374 2859 /* AssocResp and ReassocResp have identical structure */
f0706e82 2860
f0706e82 2861 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 2862 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 2863
1dd84aa2 2864 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
bdcbd8e0
JB		 2865 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2866 aid);
1dd84aa2
JB		 2867 aid &= ~(BIT(15) | BIT(14));
2868
05cb9108
JB		 2869 ifmgd->broken_ap = false;
2870
2871 if (aid == 0 || aid > IEEE80211_MAX_AID) {
bdcbd8e0
JB		 2872 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2873 aid);
05cb9108
JB		 2874 aid = 0;
2875 ifmgd->broken_ap = true;
2876 }
2877
af6b6374 2878 pos = mgmt->u.assoc_resp.variable;
b2e506bf 2879 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
af6b6374 2880
f0706e82 2881 if (!elems.supp_rates) {
bdcbd8e0 2882 sdata_info(sdata, "no SuppRates element in AssocResp\n");
af6b6374 2883 return false;
f0706e82
JB		 2884 }
2885
46900298 2886 ifmgd->aid = aid;
9041c1fa
AN		 2887 ifmgd->tdls_chan_switch_prohibited =
2888 elems.ext_capab && elems.ext_capab_len >= 5 &&
2889 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
f0706e82 2890
35d865af
JB		 2891 /*
2892 * Some APs are erroneously not including some information in their
2893 * (re)association response frames. Try to recover by using the data
2894 * from the beacon or probe response. This seems to afflict mobile
2895 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2896 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2897 */
2898 if ((assoc_data->wmm && !elems.wmm_param) ||
2899 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2900 (!elems.ht_cap_elem || !elems.ht_operation)) ||
2901 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2902 (!elems.vht_cap_elem || !elems.vht_operation))) {
2903 const struct cfg80211_bss_ies *ies;
2904 struct ieee802_11_elems bss_elems;
2905
2906 rcu_read_lock();
2907 ies = rcu_dereference(cbss->ies);
2908 if (ies)
2909 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2910 GFP_ATOMIC);
2911 rcu_read_unlock();
2912 if (!bss_ies)
2913 return false;
2914
2915 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2916 false, &bss_elems);
2917 if (assoc_data->wmm &&
2918 !elems.wmm_param && bss_elems.wmm_param) {
2919 elems.wmm_param = bss_elems.wmm_param;
2920 sdata_info(sdata,
2921 "AP bug: WMM param missing from AssocResp\n");
2922 }
2923
2924 /*
2925 * Also check if we requested HT/VHT, otherwise the AP doesn't
2926 * have to include the IEs in the (re)association response.
2927 */
2928 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2929 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2930 elems.ht_cap_elem = bss_elems.ht_cap_elem;
2931 sdata_info(sdata,
2932 "AP bug: HT capability missing from AssocResp\n");
2933 }
2934 if (!elems.ht_operation && bss_elems.ht_operation &&
2935 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2936 elems.ht_operation = bss_elems.ht_operation;
2937 sdata_info(sdata,
2938 "AP bug: HT operation missing from AssocResp\n");
2939 }
2940 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2941 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2942 elems.vht_cap_elem = bss_elems.vht_cap_elem;
2943 sdata_info(sdata,
2944 "AP bug: VHT capa missing from AssocResp\n");
2945 }
2946 if (!elems.vht_operation && bss_elems.vht_operation &&
2947 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2948 elems.vht_operation = bss_elems.vht_operation;
2949 sdata_info(sdata,
2950 "AP bug: VHT operation missing from AssocResp\n");
2951 }
2952 }
2953
30eb1dc2
JB		 2954 /*
2955 * We previously checked these in the beacon/probe response, so
2956 * they should be present here. This is just a safety net.
2957 */
2958 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2959 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2960 sdata_info(sdata,
35d865af
JB		 2961 "HT AP is missing WMM params or HT capability/operation\n");
2962 ret = false;
2963 goto out;
30eb1dc2
JB		 2964 }
2965
2966 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2967 (!elems.vht_cap_elem || !elems.vht_operation)) {
2968 sdata_info(sdata,
35d865af
JB		 2969 "VHT AP is missing VHT capability/operation\n");
2970 ret = false;
2971 goto out;
30eb1dc2
JB		 2972 }
2973
2a33bee2
GE		 2974 mutex_lock(&sdata->local->sta_mtx);
2975 /*
2976 * station info was already allocated and inserted before
2977 * the association and should be available to us
2978 */
7852e361 2979 sta = sta_info_get(sdata, cbss->bssid);
2a33bee2
GE		 2980 if (WARN_ON(!sta)) {
2981 mutex_unlock(&sdata->local->sta_mtx);
35d865af
JB		 2982 ret = false;
2983 goto out;
77fdaa12 2984 }
05e5e883 2985
55de908a 2986 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
f709fc69 2987
30eb1dc2 2988 /* Set up internal HT/VHT capabilities */
a8243b72 2989 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
ef96a842 2990 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
e1a0c6b3 2991 elems.ht_cap_elem, sta);
64f68e5d 2992
818255ea
MP		 2993 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2994 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
4a34215e 2995 elems.vht_cap_elem, sta);
818255ea 2996
30eb1dc2
JB		 2997 /*
2998 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
2999 * in their association response, so ignore that data for our own
3000 * configuration. If it changed since the last beacon, we'll get the
3001 * next beacon and update then.
3002 */
1128958d 3003
bee7f586
JB		 3004 /*
3005 * If an operating mode notification IE is present, override the
3006 * NSS calculation (that would be done in rate_control_rate_init())
3007 * and use the # of streams from that element.
3008 */
3009 if (elems.opmode_notif &&
3010 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
3011 u8 nss;
3012
3013 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
3014 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
3015 nss += 1;
3016 sta->sta.rx_nss = nss;
3017 }
3018
4b7679a5 3019 rate_control_rate_init(sta);
f0706e82 3020
93f0490e 3021 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) {
c2c98fde 3022 set_sta_flag(sta, WLAN_STA_MFP);
93f0490e
T		 3023 sta->sta.mfp = true;
3024 } else {
3025 sta->sta.mfp = false;
3026 }
5394af4d 3027
527871d7 3028 sta->sta.wme = elems.wmm_param && local->hw.queues >= IEEE80211_NUM_ACS;
ddf4ac53 3029
3e4d40fa 3030 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
c8987876
JB		 3031 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
3032 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
3033 if (err) {
bdcbd8e0
JB		 3034 sdata_info(sdata,
3035 "failed to move station %pM to desired state\n",
3036 sta->sta.addr);
c8987876
JB		 3037 WARN_ON(__sta_info_destroy(sta));
3038 mutex_unlock(&sdata->local->sta_mtx);
35d865af
JB		 3039 ret = false;
3040 goto out;
c8987876
JB		 3041 }
3042
7852e361 3043 mutex_unlock(&sdata->local->sta_mtx);
ddf4ac53 3044
f2176d72
JO		 3045 /*
3046 * Always handle WMM once after association regardless
3047 * of the first value the AP uses. Setting -1 here has
3048 * that effect because the AP values is an unsigned
3049 * 4-bit value.
3050 */
3051 ifmgd->wmm_last_param_set = -1;
3052
095d81ce 3053 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && elems.wmm_param)
4ced3f74 3054 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 3055 elems.wmm_param_len);
aa837e1d 3056 else
3abead59
JB		 3057 ieee80211_set_wmm_default(sdata, false);
3058 changed |= BSS_CHANGED_QOS;
f0706e82 3059
60f8b39c
JB		 3060 /* set AID and assoc capability,
3061 * ieee80211_set_associated() will tell the driver */
3062 bss_conf->aid = aid;
3063 bss_conf->assoc_capability = capab_info;
0c1ad2ca 3064 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 3065
d524215f
FF		 3066 /*
3067 * If we're using 4-addr mode, let the AP know that we're
3068 * doing so, so that it can create the STA VLAN on its side
3069 */
3070 if (ifmgd->use_4addr)
3071 ieee80211_send_4addr_nullfunc(local, sdata);
3072
15b7b062 3073 /*
b291ba11
JB		 3074 * Start timer to probe the connection to the AP now.
3075 * Also start the timer that will detect beacon loss.
15b7b062 3076 */
b291ba11 3077 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 3078 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 3079
35d865af
JB		 3080 ret = true;
3081 out:
3082 kfree(bss_ies);
3083 return ret;
f0706e82
JB		 3084}
3085
8d61ffa5
JB		 3086static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
3087 struct ieee80211_mgmt *mgmt,
3088 size_t len)
66e67e41
JB		 3089{
3090 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3091 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3092 u16 capab_info, status_code, aid;
3093 struct ieee802_11_elems elems;
b0b6aa2c 3094 int ac, uapsd_queues = -1;
66e67e41
JB		 3095 u8 *pos;
3096 bool reassoc;
8d61ffa5 3097 struct cfg80211_bss *bss;
d0d1a12f
EG		 3098 struct ieee80211_event event = {
3099 .type = MLME_EVENT,
3100 .u.mlme.data = ASSOC_EVENT,
3101 };
66e67e41 3102
8d61ffa5 3103 sdata_assert_lock(sdata);
66e67e41
JB		 3104
3105 if (!assoc_data)
8d61ffa5 3106 return;
b203ca39 3107 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
8d61ffa5 3108 return;
66e67e41
JB		 3109
3110 /*
3111 * AssocResp and ReassocResp have identical structure, so process both
3112 * of them in this function.
3113 */
3114
3115 if (len < 24 + 6)
8d61ffa5 3116 return;
66e67e41
JB		 3117
3118 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
3119 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3120 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
3121 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3122
bdcbd8e0
JB		 3123 sdata_info(sdata,
3124 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3125 reassoc ? "Rea" : "A", mgmt->sa,
3126 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
66e67e41
JB		 3127
3128 pos = mgmt->u.assoc_resp.variable;
b2e506bf 3129 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
66e67e41
JB		 3130
3131 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
79ba1d89
JB		 3132 elems.timeout_int &&
3133 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
66e67e41 3134 u32 tu, ms;
79ba1d89 3135 tu = le32_to_cpu(elems.timeout_int->value);
66e67e41 3136 ms = tu * 1024 / 1000;
bdcbd8e0
JB		 3137 sdata_info(sdata,
3138 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3139 mgmt->sa, tu, ms);
66e67e41 3140 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
89afe614 3141 assoc_data->timeout_started = true;
66e67e41 3142 if (ms > IEEE80211_ASSOC_TIMEOUT)
8d61ffa5
JB		 3143 run_again(sdata, assoc_data->timeout);
3144 return;
66e67e41
JB		 3145 }
3146
8d61ffa5 3147 bss = assoc_data->bss;
66e67e41
JB		 3148
3149 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 3150 sdata_info(sdata, "%pM denied association (code=%d)\n",
3151 mgmt->sa, status_code);
66e67e41 3152 ieee80211_destroy_assoc_data(sdata, false);
d0d1a12f
EG		 3153 event.u.mlme.status = MLME_DENIED;
3154 event.u.mlme.reason = status_code;
3155 drv_event_callback(sdata->local, sdata, &event);
66e67e41 3156 } else {
8d61ffa5 3157 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
66e67e41 3158 /* oops -- internal error -- send timeout for now */
10a9109f 3159 ieee80211_destroy_assoc_data(sdata, false);
959867fa 3160 cfg80211_assoc_timeout(sdata->dev, bss);
8d61ffa5 3161 return;
66e67e41 3162 }
d0d1a12f
EG		 3163 event.u.mlme.status = MLME_SUCCESS;
3164 drv_event_callback(sdata->local, sdata, &event);
635d999f 3165 sdata_info(sdata, "associated\n");
79ebfb85
JB		 3166
3167 /*
3168 * destroy assoc_data afterwards, as otherwise an idle
3169 * recalc after assoc_data is NULL but before associated
3170 * is set can cause the interface to go idle
3171 */
3172 ieee80211_destroy_assoc_data(sdata, true);
b0b6aa2c
EP		 3173
3174 /* get uapsd queues configuration */
3175 uapsd_queues = 0;
3176 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
3177 if (sdata->tx_conf[ac].uapsd)
3178 uapsd_queues |= BIT(ac);
66e67e41
JB		 3179 }
3180
b0b6aa2c 3181 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues);
66e67e41 3182}
8e3c1b77 3183
98c8fccf 3184static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
8e3c1b77 3185 struct ieee80211_mgmt *mgmt, size_t len,
98c8fccf 3186 struct ieee80211_rx_status *rx_status,
d45c4172 3187 struct ieee802_11_elems *elems)
98c8fccf
JB		 3188{
3189 struct ieee80211_local *local = sdata->local;
c2b13452 3190 struct ieee80211_bss *bss;
98c8fccf 3191 struct ieee80211_channel *channel;
56007a02 3192
8d61ffa5 3193 sdata_assert_lock(sdata);
b4f286a1 3194
3afc2167
EG		 3195 channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
3196 if (!channel)
98c8fccf
JB		 3197 return;
3198
98c8fccf 3199 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
d45c4172 3200 channel);
817cee76 3201 if (bss) {
817cee76 3202 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
d2722f8b 3203 ieee80211_rx_bss_put(local, bss);
817cee76 3204 }
f0706e82
JB		 3205}
3206
3207
f698d856 3208static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 3209 struct sk_buff *skb)
f0706e82 3210{
af6b6374 3211 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 3212 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 3213 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
3214 size_t baselen, len = skb->len;
ae6a44e3
EK		 3215 struct ieee802_11_elems elems;
3216
15b7b062
KV		 3217 ifmgd = &sdata->u.mgd;
3218
8d61ffa5 3219 sdata_assert_lock(sdata);
77fdaa12 3220
b203ca39 3221 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
8e7cdbb6
TW		 3222 return; /* ignore ProbeResp to foreign address */
3223
ae6a44e3
EK		 3224 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
3225 if (baselen > len)
3226 return;
3227
3228 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
b2e506bf 3229 false, &elems);
ae6a44e3 3230
d45c4172 3231 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
9859b81e 3232
77fdaa12 3233 if (ifmgd->associated &&
b203ca39 3234 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
4e5ff376 3235 ieee80211_reset_ap_probe(sdata);
f0706e82
JB		 3236}
3237
d91f36db
JB		 3238/*
3239 * This is the canonical list of information elements we care about,
3240 * the filter code also gives us all changes to the Microsoft OUI
c8d65917
SG		 3241 * (00:50:F2) vendor IE which is used for WMM which we need to track,
3242 * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3243 * changes to requested client power.
d91f36db
JB		 3244 *
3245 * We implement beacon filtering in software since that means we can
3246 * avoid processing the frame here and in cfg80211, and userspace
3247 * will not be able to tell whether the hardware supports it or not.
3248 *
3249 * XXX: This list needs to be dynamic -- userspace needs to be able to
3250 * add items it requires. It also needs to be able to tell us to
3251 * look out for other vendor IEs.
3252 */
3253static const u64 care_about_ies =
1d4df3a5
JB		 3254 (1ULL << WLAN_EID_COUNTRY) |
3255 (1ULL << WLAN_EID_ERP_INFO) |
3256 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
3257 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
3258 (1ULL << WLAN_EID_HT_CAPABILITY) |
70a3fd6c
JB		 3259 (1ULL << WLAN_EID_HT_OPERATION) |
3260 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN);
d91f36db 3261
8d61ffa5
JB		 3262static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
3263 struct ieee80211_mgmt *mgmt, size_t len,
3264 struct ieee80211_rx_status *rx_status)
f0706e82 3265{
d91f36db 3266 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 3267 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 3268 size_t baselen;
3269 struct ieee802_11_elems elems;
f698d856 3270 struct ieee80211_local *local = sdata->local;
55de908a
JB		 3271 struct ieee80211_chanctx_conf *chanctx_conf;
3272 struct ieee80211_channel *chan;
bee7f586 3273 struct sta_info *sta;
471b3efd 3274 u32 changed = 0;
f87ad637 3275 bool erp_valid;
7a5158ef 3276 u8 erp_value = 0;
d91f36db 3277 u32 ncrc;
77fdaa12 3278 u8 *bssid;
8d61ffa5 3279 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
77fdaa12 3280
8d61ffa5 3281 sdata_assert_lock(sdata);
f0706e82 3282
ae6a44e3
EK		 3283 /* Process beacon from the current BSS */
3284 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3285 if (baselen > len)
8d61ffa5 3286 return;
ae6a44e3 3287
55de908a
JB		 3288 rcu_read_lock();
3289 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3290 if (!chanctx_conf) {
3291 rcu_read_unlock();
8d61ffa5 3292 return;
55de908a
JB		 3293 }
3294
4bf88530 3295 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
55de908a 3296 rcu_read_unlock();
8d61ffa5 3297 return;
55de908a 3298 }
4bf88530 3299 chan = chanctx_conf->def.chan;
55de908a 3300 rcu_read_unlock();
f0706e82 3301
c65dd147 3302 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
b203ca39 3303 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
66e67e41 3304 ieee802_11_parse_elems(mgmt->u.beacon.variable,
b2e506bf 3305 len - baselen, false, &elems);
77fdaa12 3306
d45c4172 3307 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
482a9c74
AB		 3308 if (elems.tim && !elems.parse_error) {
3309 const struct ieee80211_tim_ie *tim_ie = elems.tim;
3310 ifmgd->dtim_period = tim_ie->dtim_period;
3311 }
989c6505 3312 ifmgd->have_beacon = true;
c65dd147 3313 ifmgd->assoc_data->need_beacon = false;
30686bf7 3314 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
ef429dad
JB		 3315 sdata->vif.bss_conf.sync_tsf =
3316 le64_to_cpu(mgmt->u.beacon.timestamp);
3317 sdata->vif.bss_conf.sync_device_ts =
3318 rx_status->device_timestamp;
3319 if (elems.tim)
3320 sdata->vif.bss_conf.sync_dtim_count =
3321 elems.tim->dtim_count;
3322 else
3323 sdata->vif.bss_conf.sync_dtim_count = 0;
3324 }
66e67e41
JB		 3325 /* continue assoc process */
3326 ifmgd->assoc_data->timeout = jiffies;
89afe614 3327 ifmgd->assoc_data->timeout_started = true;
8d61ffa5
JB		 3328 run_again(sdata, ifmgd->assoc_data->timeout);
3329 return;
66e67e41 3330 }
77fdaa12 3331
66e67e41 3332 if (!ifmgd->associated ||
b203ca39 3333 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
8d61ffa5 3334 return;
66e67e41 3335 bssid = ifmgd->associated->bssid;
f0706e82 3336
17e4ec14 3337 /* Track average RSSI from the Beacon frames of the current AP */
17e4ec14
JM		 3338 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3339 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
338c17ae 3340 ewma_beacon_signal_init(&ifmgd->ave_beacon_signal);
17e4ec14 3341 ifmgd->last_cqm_event_signal = 0;
391a200a 3342 ifmgd->count_beacon_signal = 1;
615f7b9b 3343 ifmgd->last_ave_beacon_signal = 0;
17e4ec14 3344 } else {
391a200a 3345 ifmgd->count_beacon_signal++;
17e4ec14 3346 }
615f7b9b 3347
338c17ae
JB		 3348 ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal);
3349
615f7b9b
MV		 3350 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3351 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
338c17ae 3352 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
615f7b9b 3353 int last_sig = ifmgd->last_ave_beacon_signal;
a8182929
EG		 3354 struct ieee80211_event event = {
3355 .type = RSSI_EVENT,
3356 };
615f7b9b
MV		 3357
3358 /*
3359 * if signal crosses either of the boundaries, invoke callback
3360 * with appropriate parameters
3361 */
3362 if (sig > ifmgd->rssi_max_thold &&
3363 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3364 ifmgd->last_ave_beacon_signal = sig;
a8182929
EG		 3365 event.u.rssi.data = RSSI_EVENT_HIGH;
3366 drv_event_callback(local, sdata, &event);
615f7b9b
MV		 3367 } else if (sig < ifmgd->rssi_min_thold &&
3368 (last_sig >= ifmgd->rssi_max_thold ||
3369 last_sig == 0)) {
3370 ifmgd->last_ave_beacon_signal = sig;
a8182929
EG		 3371 event.u.rssi.data = RSSI_EVENT_LOW;
3372 drv_event_callback(local, sdata, &event);
615f7b9b
MV		 3373 }
3374 }
3375
17e4ec14 3376 if (bss_conf->cqm_rssi_thold &&
391a200a 3377 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
ea086359 3378 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
338c17ae 3379 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
17e4ec14
JM		 3380 int last_event = ifmgd->last_cqm_event_signal;
3381 int thold = bss_conf->cqm_rssi_thold;
3382 int hyst = bss_conf->cqm_rssi_hyst;
338c17ae 3383
17e4ec14
JM		 3384 if (sig < thold &&
3385 (last_event == 0 || sig < last_event - hyst)) {
3386 ifmgd->last_cqm_event_signal = sig;
3387 ieee80211_cqm_rssi_notify(
3388 &sdata->vif,
3389 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3390 GFP_KERNEL);
3391 } else if (sig > thold &&
3392 (last_event == 0 || sig > last_event + hyst)) {
3393 ifmgd->last_cqm_event_signal = sig;
3394 ieee80211_cqm_rssi_notify(
3395 &sdata->vif,
3396 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3397 GFP_KERNEL);
3398 }
3399 }
3400
392b9ffb 3401 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
bdcbd8e0 3402 mlme_dbg_ratelimited(sdata,
112c31f0 3403 "cancelling AP probe due to a received beacon\n");
392b9ffb 3404 ieee80211_reset_ap_probe(sdata);
92778180
JM		 3405 }
3406
b291ba11
JB		 3407 /*
3408 * Push the beacon loss detection into the future since
3409 * we are processing a beacon from the AP just now.
3410 */
d3a910a8 3411 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 3412
d91f36db
JB		 3413 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3414 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
b2e506bf 3415 len - baselen, false, &elems,
d91f36db
JB		 3416 care_about_ies, ncrc);
3417
90d13e8f
JB		 3418 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
3419 ieee80211_check_tim(elems.tim, elems.tim_len, ifmgd->aid)) {
3420 if (local->hw.conf.dynamic_ps_timeout > 0) {
3421 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3422 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3423 ieee80211_hw_config(local,
3424 IEEE80211_CONF_CHANGE_PS);
572e0012 3425 }
076cdcb1 3426 ieee80211_send_nullfunc(local, sdata, false);
90d13e8f
JB		 3427 } else if (!local->pspolling && sdata->u.mgd.powersave) {
3428 local->pspolling = true;
3429
3430 /*
3431 * Here is assumed that the driver will be
3432 * able to send ps-poll frame and receive a
3433 * response even though power save mode is
3434 * enabled, but some drivers might require
3435 * to disable power save here. This needs
3436 * to be investigated.
3437 */
3438 ieee80211_send_pspoll(local, sdata);
a97b77b9
VN		 3439 }
3440 }
7a5158ef 3441
488dd7b5 3442 if (sdata->vif.p2p) {
67baf663 3443 struct ieee80211_p2p_noa_attr noa = {};
488dd7b5
JB		 3444 int ret;
3445
3446 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3447 len - baselen,
3448 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
934457ee 3449 (u8 *) &noa, sizeof(noa));
67baf663
JD		 3450 if (ret >= 2) {
3451 if (sdata->u.mgd.p2p_noa_index != noa.index) {
3452 /* valid noa_attr and index changed */
3453 sdata->u.mgd.p2p_noa_index = noa.index;
3454 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3455 changed |= BSS_CHANGED_P2P_PS;
3456 /*
3457 * make sure we update all information, the CRC
3458 * mechanism doesn't look at P2P attributes.
3459 */
3460 ifmgd->beacon_crc_valid = false;
3461 }
3462 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3463 /* noa_attr not found and we had valid noa_attr before */
3464 sdata->u.mgd.p2p_noa_index = -1;
3465 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
488dd7b5 3466 changed |= BSS_CHANGED_P2P_PS;
488dd7b5
JB		 3467 ifmgd->beacon_crc_valid = false;
3468 }
3469 }
3470
0c21e632
LC		 3471 if (ifmgd->csa_waiting_bcn)
3472 ieee80211_chswitch_post_beacon(sdata);
3473
2ecc3905
AB		 3474 /*
3475 * Update beacon timing and dtim count on every beacon appearance. This
3476 * will allow the driver to use the most updated values. Do it before
3477 * comparing this one with last received beacon.
3478 * IMPORTANT: These parameters would possibly be out of sync by the time
3479 * the driver will use them. The synchronized view is currently
3480 * guaranteed only in certain callbacks.
3481 */
30686bf7 3482 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
2ecc3905
AB		 3483 sdata->vif.bss_conf.sync_tsf =
3484 le64_to_cpu(mgmt->u.beacon.timestamp);
3485 sdata->vif.bss_conf.sync_device_ts =
3486 rx_status->device_timestamp;
3487 if (elems.tim)
3488 sdata->vif.bss_conf.sync_dtim_count =
3489 elems.tim->dtim_count;
3490 else
3491 sdata->vif.bss_conf.sync_dtim_count = 0;
3492 }
3493
d8ec4433 3494 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
8d61ffa5 3495 return;
30196673 3496 ifmgd->beacon_crc = ncrc;
d8ec4433 3497 ifmgd->beacon_crc_valid = true;
30196673 3498
d45c4172 3499 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
7d25745d 3500
d70b7616 3501 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
2ba45384 3502 rx_status->device_timestamp,
d70b7616
JB		 3503 &elems, true);
3504
095d81ce
JB		 3505 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3506 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
7d25745d
JB		 3507 elems.wmm_param_len))
3508 changed |= BSS_CHANGED_QOS;
3509
c65dd147
EG		 3510 /*
3511 * If we haven't had a beacon before, tell the driver about the
ef429dad 3512 * DTIM period (and beacon timing if desired) now.
c65dd147 3513 */
989c6505 3514 if (!ifmgd->have_beacon) {
c65dd147
EG		 3515 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3516 if (elems.tim)
3517 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3518 else
3519 bss_conf->dtim_period = 1;
ef429dad 3520
989c6505
AB		 3521 changed |= BSS_CHANGED_BEACON_INFO;
3522 ifmgd->have_beacon = true;
482a9c74
AB		 3523
3524 mutex_lock(&local->iflist_mtx);
4a733ef1 3525 ieee80211_recalc_ps(local);
482a9c74
AB		 3526 mutex_unlock(&local->iflist_mtx);
3527
ce857888 3528 ieee80211_recalc_ps_vif(sdata);
c65dd147
EG		 3529 }
3530
1946bed9 3531 if (elems.erp_info) {
7a5158ef
JB		 3532 erp_valid = true;
3533 erp_value = elems.erp_info[0];
3534 } else {
3535 erp_valid = false;
50c4afb9 3536 }
7a5158ef
JB		 3537 changed |= ieee80211_handle_bss_capability(sdata,
3538 le16_to_cpu(mgmt->u.beacon.capab_info),
3539 erp_valid, erp_value);
f0706e82 3540
1128958d 3541 mutex_lock(&local->sta_mtx);
bee7f586
JB		 3542 sta = sta_info_get(sdata, bssid);
3543
53b954ee
EP		 3544 if (ieee80211_config_bw(sdata, sta,
3545 elems.ht_cap_elem, elems.ht_operation,
30eb1dc2
JB		 3546 elems.vht_operation, bssid, &changed)) {
3547 mutex_unlock(&local->sta_mtx);
3548 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3549 WLAN_REASON_DEAUTH_LEAVING,
3550 true, deauth_buf);
a90faa9d
EG		 3551 ieee80211_report_disconnect(sdata, deauth_buf,
3552 sizeof(deauth_buf), true,
3553 WLAN_REASON_DEAUTH_LEAVING);
8d61ffa5 3554 return;
30eb1dc2 3555 }
bee7f586
JB		 3556
3557 if (sta && elems.opmode_notif)
3558 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3559 rx_status->band, true);
1128958d 3560 mutex_unlock(&local->sta_mtx);
d3c990fb 3561
24a4e400
SG		 3562 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
3563 elems.country_elem,
3564 elems.country_elem_len,
c8d65917
SG		 3565 elems.pwr_constr_elem,
3566 elems.cisco_dtpc_elem);
3f2355cb 3567
471b3efd 3568 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 3569}
3570
1fa57d01
JB		 3571void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3572 struct sk_buff *skb)
f0706e82
JB		 3573{
3574 struct ieee80211_rx_status *rx_status;
f0706e82
JB		 3575 struct ieee80211_mgmt *mgmt;
3576 u16 fc;
1b3a2e49
JB		 3577 struct ieee802_11_elems elems;
3578 int ies_len;
f0706e82 3579
f0706e82
JB		 3580 rx_status = (struct ieee80211_rx_status *) skb->cb;
3581 mgmt = (struct ieee80211_mgmt *) skb->data;
3582 fc = le16_to_cpu(mgmt->frame_control);
3583
8d61ffa5 3584 sdata_lock(sdata);
77fdaa12 3585
66e67e41
JB		 3586 switch (fc & IEEE80211_FCTL_STYPE) {
3587 case IEEE80211_STYPE_BEACON:
8d61ffa5 3588 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
66e67e41
JB		 3589 break;
3590 case IEEE80211_STYPE_PROBE_RESP:
3591 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3592 break;
3593 case IEEE80211_STYPE_AUTH:
8d61ffa5 3594 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
66e67e41
JB		 3595 break;
3596 case IEEE80211_STYPE_DEAUTH:
8d61ffa5 3597 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
66e67e41
JB		 3598 break;
3599 case IEEE80211_STYPE_DISASSOC:
8d61ffa5 3600 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
66e67e41
JB		 3601 break;
3602 case IEEE80211_STYPE_ASSOC_RESP:
3603 case IEEE80211_STYPE_REASSOC_RESP:
8d61ffa5 3604 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
66e67e41
JB		 3605 break;
3606 case IEEE80211_STYPE_ACTION:
37799e52 3607 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
1b3a2e49
JB		 3608 ies_len = skb->len -
3609 offsetof(struct ieee80211_mgmt,
3610 u.action.u.chan_switch.variable);
37799e52
JB		 3611
3612 if (ies_len < 0)
3613 break;
3614
3615 ieee802_11_parse_elems(
3616 mgmt->u.action.u.chan_switch.variable,
b2e506bf 3617 ies_len, true, &elems);
37799e52
JB		 3618
3619 if (elems.parse_error)
3620 break;
3621
1b3a2e49 3622 ieee80211_sta_process_chanswitch(sdata,
2ba45384
LC		 3623 rx_status->mactime,
3624 rx_status->device_timestamp,
3625 &elems, false);
1b3a2e49
JB		 3626 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3627 ies_len = skb->len -
3628 offsetof(struct ieee80211_mgmt,
3629 u.action.u.ext_chan_switch.variable);
3630
3631 if (ies_len < 0)
3632 break;
3633
3634 ieee802_11_parse_elems(
3635 mgmt->u.action.u.ext_chan_switch.variable,
b2e506bf 3636 ies_len, true, &elems);
1b3a2e49
JB		 3637
3638 if (elems.parse_error)
3639 break;
3640
3641 /* for the handling code pretend this was also an IE */
3642 elems.ext_chansw_ie =
3643 &mgmt->u.action.u.ext_chan_switch.data;
3644
66e67e41 3645 ieee80211_sta_process_chanswitch(sdata,
2ba45384
LC		 3646 rx_status->mactime,
3647 rx_status->device_timestamp,
3648 &elems, false);
77fdaa12 3649 }
37799e52 3650 break;
77fdaa12 3651 }
8d61ffa5 3652 sdata_unlock(sdata);
f0706e82
JB		 3653}
3654
9c6bd790 3655static void ieee80211_sta_timer(unsigned long data)
f0706e82 3656{
60f8b39c
JB		 3657 struct ieee80211_sub_if_data *sdata =
3658 (struct ieee80211_sub_if_data *) data;
5bb644a0 3659
9b7d72c1 3660 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
f0706e82
JB		 3661}
3662
04ac3c0e 3663static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
6b684db1 3664 u8 *bssid, u8 reason, bool tx)
04ac3c0e 3665{
6ae16775 3666 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
04ac3c0e 3667
37ad3888 3668 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
6b684db1 3669 tx, frame_buf);
37ad3888 3670
a90faa9d
EG		 3671 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
3672 reason);
04ac3c0e
FF		 3673}
3674
46cad4b7 3675static int ieee80211_auth(struct ieee80211_sub_if_data *sdata)
66e67e41
JB		 3676{
3677 struct ieee80211_local *local = sdata->local;
3678 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3679 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
1672c0e3 3680 u32 tx_flags = 0;
46cad4b7
JB		 3681 u16 trans = 1;
3682 u16 status = 0;
66e67e41 3683
8d61ffa5 3684 sdata_assert_lock(sdata);
66e67e41
JB		 3685
3686 if (WARN_ON_ONCE(!auth_data))
3687 return -EINVAL;
3688
66e67e41
JB		 3689 auth_data->tries++;
3690
3691 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
bdcbd8e0
JB		 3692 sdata_info(sdata, "authentication with %pM timed out\n",
3693 auth_data->bss->bssid);
66e67e41
JB		 3694
3695 /*
3696 * Most likely AP is not in the range so remove the
3697 * bss struct for that AP.
3698 */
3699 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3700
3701 return -ETIMEDOUT;
3702 }
3703
a1845fc7
JB		 3704 drv_mgd_prepare_tx(local, sdata);
3705
46cad4b7
JB		 3706 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3707 auth_data->bss->bssid, auth_data->tries,
3708 IEEE80211_AUTH_MAX_TRIES);
66e67e41 3709
46cad4b7 3710 auth_data->expected_transaction = 2;
6b8ece3a 3711
46cad4b7
JB		 3712 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3713 trans = auth_data->sae_trans;
3714 status = auth_data->sae_status;
3715 auth_data->expected_transaction = trans;
3716 }
66e67e41 3717
46cad4b7
JB		 3718 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
3719 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3720 IEEE80211_TX_INTFL_MLME_CONN_TX;
66e67e41 3721
46cad4b7
JB		 3722 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3723 auth_data->data, auth_data->data_len,
3724 auth_data->bss->bssid,
3725 auth_data->bss->bssid, NULL, 0, 0,
3726 tx_flags);
66e67e41 3727
6211dd12 3728 if (tx_flags == 0) {
1672c0e3 3729 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
cb236d2d 3730 auth_data->timeout_started = true;
8d61ffa5 3731 run_again(sdata, auth_data->timeout);
89afe614 3732 } else {
cb236d2d
JB		 3733 auth_data->timeout =
3734 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3735 auth_data->timeout_started = true;
3736 run_again(sdata, auth_data->timeout);
1672c0e3 3737 }
66e67e41
JB		 3738
3739 return 0;
3740}
3741
3742static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3743{
3744 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3745 struct ieee80211_local *local = sdata->local;
3746
8d61ffa5 3747 sdata_assert_lock(sdata);
66e67e41 3748
66e67e41
JB		 3749 assoc_data->tries++;
3750 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
bdcbd8e0
JB		 3751 sdata_info(sdata, "association with %pM timed out\n",
3752 assoc_data->bss->bssid);
66e67e41
JB		 3753
3754 /*
3755 * Most likely AP is not in the range so remove the
3756 * bss struct for that AP.
3757 */
3758 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3759
3760 return -ETIMEDOUT;
3761 }
3762
bdcbd8e0
JB		 3763 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3764 assoc_data->bss->bssid, assoc_data->tries,
3765 IEEE80211_ASSOC_MAX_TRIES);
66e67e41
JB		 3766 ieee80211_send_assoc(sdata);
3767
30686bf7 3768 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
1672c0e3 3769 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
89afe614 3770 assoc_data->timeout_started = true;
8d61ffa5 3771 run_again(sdata, assoc_data->timeout);
89afe614 3772 } else {
cb236d2d
JB		 3773 assoc_data->timeout =
3774 round_jiffies_up(jiffies +
3775 IEEE80211_ASSOC_TIMEOUT_LONG);
3776 assoc_data->timeout_started = true;
3777 run_again(sdata, assoc_data->timeout);
1672c0e3 3778 }
66e67e41
JB		 3779
3780 return 0;
3781}
3782
1672c0e3
JB		 3783void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3784 __le16 fc, bool acked)
3785{
3786 struct ieee80211_local *local = sdata->local;
3787
3788 sdata->u.mgd.status_fc = fc;
3789 sdata->u.mgd.status_acked = acked;
3790 sdata->u.mgd.status_received = true;
3791
3792 ieee80211_queue_work(&local->hw, &sdata->work);
3793}
3794
1fa57d01 3795void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 3796{
9c6bd790 3797 struct ieee80211_local *local = sdata->local;
1fa57d01 3798 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 3799
8d61ffa5 3800 sdata_lock(sdata);
77fdaa12 3801
1672c0e3
JB		 3802 if (ifmgd->status_received) {
3803 __le16 fc = ifmgd->status_fc;
3804 bool status_acked = ifmgd->status_acked;
3805
3806 ifmgd->status_received = false;
46cad4b7 3807 if (ifmgd->auth_data && ieee80211_is_auth(fc)) {
1672c0e3
JB		 3808 if (status_acked) {
3809 ifmgd->auth_data->timeout =
3810 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
8d61ffa5 3811 run_again(sdata, ifmgd->auth_data->timeout);
1672c0e3
JB		 3812 } else {
3813 ifmgd->auth_data->timeout = jiffies - 1;
3814 }
89afe614 3815 ifmgd->auth_data->timeout_started = true;
1672c0e3
JB		 3816 } else if (ifmgd->assoc_data &&
3817 (ieee80211_is_assoc_req(fc) ||
3818 ieee80211_is_reassoc_req(fc))) {
3819 if (status_acked) {
3820 ifmgd->assoc_data->timeout =
3821 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
8d61ffa5 3822 run_again(sdata, ifmgd->assoc_data->timeout);
1672c0e3
JB		 3823 } else {
3824 ifmgd->assoc_data->timeout = jiffies - 1;
3825 }
89afe614 3826 ifmgd->assoc_data->timeout_started = true;
1672c0e3
JB		 3827 }
3828 }
3829
89afe614 3830 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
66e67e41
JB		 3831 time_after(jiffies, ifmgd->auth_data->timeout)) {
3832 if (ifmgd->auth_data->done) {
3833 /*
3834 * ok ... we waited for assoc but userspace didn't,
3835 * so let's just kill the auth data
3836 */
3837 ieee80211_destroy_auth_data(sdata, false);
46cad4b7 3838 } else if (ieee80211_auth(sdata)) {
66e67e41 3839 u8 bssid[ETH_ALEN];
a9409093
EG		 3840 struct ieee80211_event event = {
3841 .type = MLME_EVENT,
3842 .u.mlme.data = AUTH_EVENT,
3843 .u.mlme.status = MLME_TIMEOUT,
3844 };
66e67e41
JB		 3845
3846 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3847
3848 ieee80211_destroy_auth_data(sdata, false);
3849
6ff57cf8 3850 cfg80211_auth_timeout(sdata->dev, bssid);
a9409093 3851 drv_event_callback(sdata->local, sdata, &event);
66e67e41 3852 }
89afe614 3853 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
8d61ffa5 3854 run_again(sdata, ifmgd->auth_data->timeout);
66e67e41 3855
89afe614 3856 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
66e67e41 3857 time_after(jiffies, ifmgd->assoc_data->timeout)) {
989c6505 3858 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
66e67e41 3859 ieee80211_do_assoc(sdata)) {
959867fa 3860 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
d0d1a12f
EG		 3861 struct ieee80211_event event = {
3862 .type = MLME_EVENT,
3863 .u.mlme.data = ASSOC_EVENT,
3864 .u.mlme.status = MLME_TIMEOUT,
3865 };
66e67e41
JB		 3866
3867 ieee80211_destroy_assoc_data(sdata, false);
959867fa 3868 cfg80211_assoc_timeout(sdata->dev, bss);
d0d1a12f 3869 drv_event_callback(sdata->local, sdata, &event);
66e67e41 3870 }
89afe614 3871 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
8d61ffa5 3872 run_again(sdata, ifmgd->assoc_data->timeout);
66e67e41 3873
392b9ffb 3874 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
b291ba11 3875 ifmgd->associated) {
a43abf29 3876 u8 bssid[ETH_ALEN];
72a8a3ed 3877 int max_tries;
a43abf29 3878
0c1ad2ca 3879 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 3880
30686bf7 3881 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
180205bd 3882 max_tries = max_nullfunc_tries;
72a8a3ed 3883 else
180205bd 3884 max_tries = max_probe_tries;
72a8a3ed 3885
4e5ff376
FF		 3886 /* ACK received for nullfunc probing frame */
3887 if (!ifmgd->probe_send_count)
3888 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 3889 else if (ifmgd->nullfunc_failed) {
3890 if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3891 mlme_dbg(sdata,
3892 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3893 bssid, ifmgd->probe_send_count,
3894 max_tries);
04ac3c0e
FF		 3895 ieee80211_mgd_probe_ap_send(sdata);
3896 } else {
bdcbd8e0
JB		 3897 mlme_dbg(sdata,
3898 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3899 bssid);
95acac61 3900 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1
JB		 3901 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3902 false);
04ac3c0e
FF		 3903 }
3904 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
8d61ffa5 3905 run_again(sdata, ifmgd->probe_timeout);
30686bf7 3906 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
bdcbd8e0
JB		 3907 mlme_dbg(sdata,
3908 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3909 bssid, probe_wait_ms);
95acac61 3910 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 3911 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
04ac3c0e 3912 } else if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3913 mlme_dbg(sdata,
3914 "No probe response from AP %pM after %dms, try %d/%i\n",
3915 bssid, probe_wait_ms,
3916 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 3917 ieee80211_mgd_probe_ap_send(sdata);
3918 } else {
b291ba11
JB		 3919 /*
3920 * We actually lost the connection ... or did we?
3921 * Let's make sure!
3922 */
b38afa87
BG		 3923 wiphy_debug(local->hw.wiphy,
3924 "%s: No probe response from AP %pM"
3925 " after %dms, disconnecting.\n",
3926 sdata->name,
180205bd 3927 bssid, probe_wait_ms);
04ac3c0e 3928
95acac61 3929 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 3930 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
b291ba11
JB		 3931 }
3932 }
3933
8d61ffa5 3934 sdata_unlock(sdata);
f0706e82
JB		 3935}
3936
b291ba11
JB		 3937static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3938{
3939 struct ieee80211_sub_if_data *sdata =
3940 (struct ieee80211_sub_if_data *) data;
0c21e632 3941 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 3942
0c21e632 3943 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
e5593f56
MK		 3944 return;
3945
682bd38b 3946 sdata->u.mgd.connection_loss = false;
1e4dcd01
JO		 3947 ieee80211_queue_work(&sdata->local->hw,
3948 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 3949}
3950
3951static void ieee80211_sta_conn_mon_timer(unsigned long data)
3952{
3953 struct ieee80211_sub_if_data *sdata =
3954 (struct ieee80211_sub_if_data *) data;
3955 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3956 struct ieee80211_local *local = sdata->local;
3957
0c21e632 3958 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
e5593f56
MK		 3959 return;
3960
42935eca 3961 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 3962}
3963
3964static void ieee80211_sta_monitor_work(struct work_struct *work)
3965{
3966 struct ieee80211_sub_if_data *sdata =
3967 container_of(work, struct ieee80211_sub_if_data,
3968 u.mgd.monitor_work);
3969
3970 ieee80211_mgd_probe_ap(sdata, false);
3971}
3972
9c6bd790
JB		 3973static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3974{
ad935687 3975 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
925e64c3 3976 __ieee80211_stop_poll(sdata);
ad935687 3977
b291ba11 3978 /* let's probe the connection once */
30686bf7 3979 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
494f1fe5
EP		 3980 ieee80211_queue_work(&sdata->local->hw,
3981 &sdata->u.mgd.monitor_work);
b291ba11 3982 /* and do all the other regular work too */
64592c8f 3983 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 3984 }
9c6bd790 3985}
f0706e82 3986
b8360ab8 3987#ifdef CONFIG_PM
1a1cb744
JB		 3988void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
3989{
3990 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3991 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3992
3993 sdata_lock(sdata);
3994
c52666ae
EG		 3995 if (ifmgd->auth_data || ifmgd->assoc_data) {
3996 const u8 *bssid = ifmgd->auth_data ?
3997 ifmgd->auth_data->bss->bssid :
3998 ifmgd->assoc_data->bss->bssid;
3999
1a1cb744 4000 /*
c52666ae
EG		 4001 * If we are trying to authenticate / associate while suspending,
4002 * cfg80211 won't know and won't actually abort those attempts,
4003 * thus we need to do that ourselves.
1a1cb744 4004 */
c52666ae 4005 ieee80211_send_deauth_disassoc(sdata, bssid,
1a1cb744
JB		 4006 IEEE80211_STYPE_DEAUTH,
4007 WLAN_REASON_DEAUTH_LEAVING,
4008 false, frame_buf);
c52666ae
EG		 4009 if (ifmgd->assoc_data)
4010 ieee80211_destroy_assoc_data(sdata, false);
4011 if (ifmgd->auth_data)
4012 ieee80211_destroy_auth_data(sdata, false);
1a1cb744
JB		 4013 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4014 IEEE80211_DEAUTH_FRAME_LEN);
4015 }
4016
be72afe0
JB		 4017 /* This is a bit of a hack - we should find a better and more generic
4018 * solution to this. Normally when suspending, cfg80211 will in fact
4019 * deauthenticate. However, it doesn't (and cannot) stop an ongoing
4020 * auth (not so important) or assoc (this is the problem) process.
4021 *
4022 * As a consequence, it can happen that we are in the process of both
4023 * associating and suspending, and receive an association response
4024 * after cfg80211 has checked if it needs to disconnect, but before
4025 * we actually set the flag to drop incoming frames. This will then
4026 * cause the workqueue flush to process the association response in
4027 * the suspend, resulting in a successful association just before it
4028 * tries to remove the interface from the driver, which now though
4029 * has a channel context assigned ... this results in issues.
4030 *
4031 * To work around this (for now) simply deauth here again if we're
4032 * now connected.
4033 */
4034 if (ifmgd->associated && !sdata->local->wowlan) {
4035 u8 bssid[ETH_ALEN];
4036 struct cfg80211_deauth_request req = {
4037 .reason_code = WLAN_REASON_DEAUTH_LEAVING,
4038 .bssid = bssid,
4039 };
4040
4041 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4042 ieee80211_mgd_deauth(sdata, &req);
4043 }
4044
1a1cb744
JB		 4045 sdata_unlock(sdata);
4046}
4047
b8360ab8
JB		 4048void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
4049{
4050 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4051
8d61ffa5 4052 sdata_lock(sdata);
b8360ab8 4053 if (!ifmgd->associated) {
8d61ffa5 4054 sdata_unlock(sdata);
b8360ab8
JB		 4055 return;
4056 }
4057
4058 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
4059 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
4060 mlme_dbg(sdata, "driver requested disconnect after resume\n");
4061 ieee80211_sta_connection_lost(sdata,
4062 ifmgd->associated->bssid,
4063 WLAN_REASON_UNSPECIFIED,
4064 true);
8d61ffa5 4065 sdata_unlock(sdata);
b8360ab8
JB		 4066 return;
4067 }
8d61ffa5 4068 sdata_unlock(sdata);
b8360ab8
JB		 4069}
4070#endif
4071
9c6bd790
JB		 4072/* interface setup */
4073void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 4074{
46900298 4075 struct ieee80211_if_managed *ifmgd;
988c0f72 4076
46900298 4077 ifmgd = &sdata->u.mgd;
b291ba11 4078 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 4079 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 4080 INIT_WORK(&ifmgd->beacon_connection_loss_work,
4081 ieee80211_beacon_connection_loss_work);
882a7c69
JB		 4082 INIT_WORK(&ifmgd->csa_connection_drop_work,
4083 ieee80211_csa_connection_drop_work);
687da132 4084 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
81dd2b88
AN		 4085 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
4086 ieee80211_tdls_peer_del_work);
46900298 4087 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 4088 (unsigned long) sdata);
b291ba11
JB		 4089 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
4090 (unsigned long) sdata);
4091 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
4092 (unsigned long) sdata);
46900298 4093 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 4094 (unsigned long) sdata);
02219b3a
JB		 4095 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
4096 ieee80211_sta_handle_tspec_ac_params_wk);
9c6bd790 4097
ab1faead 4098 ifmgd->flags = 0;
1478acb3 4099 ifmgd->powersave = sdata->wdev.ps;
219c3867
AB		 4100 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
4101 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
67baf663 4102 ifmgd->p2p_noa_index = -1;
bbbdff9e 4103
0d8614b4 4104 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
0f78231b
JB		 4105 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
4106 else
4107 ifmgd->req_smps = IEEE80211_SMPS_OFF;
1277b4a9
LK		 4108
4109 /* Setup TDLS data */
4110 spin_lock_init(&ifmgd->teardown_lock);
4111 ifmgd->teardown_skb = NULL;
4112 ifmgd->orig_teardown_skb = NULL;
f0706e82
JB		 4113}
4114
77fdaa12
JB		 4115/* scan finished notification */
4116void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 4117{
31ee67a1 4118 struct ieee80211_sub_if_data *sdata;
60f8b39c 4119
77fdaa12
JB		 4120 /* Restart STA timers */
4121 rcu_read_lock();
370bd005
BG		 4122 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4123 if (ieee80211_sdata_running(sdata))
4124 ieee80211_restart_sta_timer(sdata);
4125 }
77fdaa12
JB		 4126 rcu_read_unlock();
4127}
60f8b39c 4128
f2d9d270
JB		 4129static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
4130 struct cfg80211_bss *cbss)
4131{
4132 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4133 const u8 *ht_cap_ie, *vht_cap_ie;
4134 const struct ieee80211_ht_cap *ht_cap;
4135 const struct ieee80211_vht_cap *vht_cap;
4136 u8 chains = 1;
4137
4138 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
4139 return chains;
4140
9caf0364 4141 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
f2d9d270
JB		 4142 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
4143 ht_cap = (void *)(ht_cap_ie + 2);
4144 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4145 /*
4146 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4147 * "Tx Unequal Modulation Supported" fields.
4148 */
4149 }
4150
4151 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
4152 return chains;
4153
9caf0364 4154 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
f2d9d270
JB		 4155 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
4156 u8 nss;
4157 u16 tx_mcs_map;
4158
4159 vht_cap = (void *)(vht_cap_ie + 2);
4160 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4161 for (nss = 8; nss > 0; nss--) {
4162 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4163 IEEE80211_VHT_MCS_NOT_SUPPORTED)
4164 break;
4165 }
4166 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4167 chains = max(chains, nss);
4168 }
4169
4170 return chains;
4171}
4172
b17166a7
JB		 4173static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4174 struct cfg80211_bss *cbss)
a1cf775d
JB		 4175{
4176 struct ieee80211_local *local = sdata->local;
4177 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
53b954ee 4178 const struct ieee80211_ht_cap *ht_cap = NULL;
24398e39 4179 const struct ieee80211_ht_operation *ht_oper = NULL;
f2d9d270 4180 const struct ieee80211_vht_operation *vht_oper = NULL;
24398e39 4181 struct ieee80211_supported_band *sband;
4bf88530 4182 struct cfg80211_chan_def chandef;
f2d9d270 4183 int ret;
52a45f38
AN		 4184 u32 i;
4185 bool have_80mhz;
a1cf775d 4186
24398e39
JB		 4187 sband = local->hw.wiphy->bands[cbss->channel->band];
4188
f2d9d270
JB		 4189 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
4190 IEEE80211_STA_DISABLE_80P80MHZ |
4191 IEEE80211_STA_DISABLE_160MHZ);
4192
9caf0364
JB		 4193 rcu_read_lock();
4194
f2d9d270
JB		 4195 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
4196 sband->ht_cap.ht_supported) {
53b954ee 4197 const u8 *ht_oper_ie, *ht_cap_ie;
24398e39 4198
9caf0364 4199 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
24398e39
JB		 4200 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
4201 ht_oper = (void *)(ht_oper_ie + 2);
08e6effa 4202
53b954ee
EP		 4203 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4204 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
4205 ht_cap = (void *)(ht_cap_ie + 2);
4206
4207 if (!ht_cap) {
08e6effa
JB		 4208 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4209 ht_oper = NULL;
4210 }
24398e39
JB		 4211 }
4212
f2d9d270
JB		 4213 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4214 sband->vht_cap.vht_supported) {
08e6effa 4215 const u8 *vht_oper_ie, *vht_cap;
f2d9d270 4216
9caf0364
JB		 4217 vht_oper_ie = ieee80211_bss_get_ie(cbss,
4218 WLAN_EID_VHT_OPERATION);
f2d9d270
JB		 4219 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
4220 vht_oper = (void *)(vht_oper_ie + 2);
4221 if (vht_oper && !ht_oper) {
4222 vht_oper = NULL;
bdcbd8e0 4223 sdata_info(sdata,
f2d9d270 4224 "AP advertised VHT without HT, disabling both\n");
cb145022
JB		 4225 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4226 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
24398e39 4227 }
08e6effa
JB		 4228
4229 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4230 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
4231 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4232 vht_oper = NULL;
4233 }
24398e39
JB		 4234 }
4235
52a45f38
AN		 4236 /* Allow VHT if at least one channel on the sband supports 80 MHz */
4237 have_80mhz = false;
4238 for (i = 0; i < sband->n_channels; i++) {
4239 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
4240 IEEE80211_CHAN_NO_80MHZ))
4241 continue;
4242
4243 have_80mhz = true;
4244 break;
4245 }
4246
4247 if (!have_80mhz)
4248 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4249
f2d9d270
JB		 4250 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
4251 cbss->channel,
53b954ee 4252 ht_cap, ht_oper, vht_oper,
5cdaed1e 4253 &chandef, false);
04ecd257 4254
f2d9d270
JB		 4255 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
4256 local->rx_chains);
24398e39 4257
9caf0364
JB		 4258 rcu_read_unlock();
4259
04ecd257
JB		 4260 /* will change later if needed */
4261 sdata->smps_mode = IEEE80211_SMPS_OFF;
4262
34a3740d 4263 mutex_lock(&local->mtx);
f2d9d270
JB		 4264 /*
4265 * If this fails (possibly due to channel context sharing
4266 * on incompatible channels, e.g. 80+80 and 160 sharing the
4267 * same control channel) try to use a smaller bandwidth.
4268 */
4269 ret = ieee80211_vif_use_channel(sdata, &chandef,
4270 IEEE80211_CHANCTX_SHARED);
0418a445
SW		 4271
4272 /* don't downgrade for 5 and 10 MHz channels, though. */
4273 if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4274 chandef.width == NL80211_CHAN_WIDTH_10)
34a3740d 4275 goto out;
0418a445 4276
d601cd8d 4277 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
e6b7cde4 4278 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
d601cd8d
JB		 4279 ret = ieee80211_vif_use_channel(sdata, &chandef,
4280 IEEE80211_CHANCTX_SHARED);
4281 }
34a3740d
JB		 4282 out:
4283 mutex_unlock(&local->mtx);
f2d9d270 4284 return ret;
b17166a7
JB		 4285}
4286
4287static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
c1041f10
CRI		 4288 struct cfg80211_bss *cbss, bool assoc,
4289 bool override)
b17166a7
JB		 4290{
4291 struct ieee80211_local *local = sdata->local;
4292 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4293 struct ieee80211_bss *bss = (void *)cbss->priv;
4294 struct sta_info *new_sta = NULL;
179b8fc7 4295 struct ieee80211_supported_band *sband;
c1041f10 4296 bool have_sta = false;
b17166a7
JB		 4297 int err;
4298
179b8fc7
CRI		 4299 sband = local->hw.wiphy->bands[cbss->channel->band];
4300
b17166a7
JB		 4301 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
4302 return -EINVAL;
4303
4304 if (assoc) {
4305 rcu_read_lock();
4306 have_sta = sta_info_get(sdata, cbss->bssid);
4307 rcu_read_unlock();
4308 }
4309
4310 if (!have_sta) {
4311 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4312 if (!new_sta)
4313 return -ENOMEM;
4314 }
179b8fc7 4315
c1041f10 4316 if (new_sta || override) {
179b8fc7
CRI		 4317 err = ieee80211_prep_channel(sdata, cbss);
4318 if (err) {
4319 if (new_sta)
4320 sta_info_free(local, new_sta);
4321 return -EINVAL;
4322 }
4323 }
4324
13e0c8e3 4325 if (new_sta) {
5d6a1b06
JB		 4326 u32 rates = 0, basic_rates = 0;
4327 bool have_higher_than_11mbit;
4328 int min_rate = INT_MAX, min_rate_index = -1;
2103dec1 4329 struct ieee80211_chanctx_conf *chanctx_conf;
8cef2c9d 4330 const struct cfg80211_bss_ies *ies;
179b8fc7 4331 int shift = ieee80211_vif_get_shift(&sdata->vif);
2103dec1 4332 u32 rate_flags;
b17166a7 4333
2103dec1
SW		 4334 rcu_read_lock();
4335 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4336 if (WARN_ON(!chanctx_conf)) {
4337 rcu_read_unlock();
c368ddaa 4338 sta_info_free(local, new_sta);
2103dec1
SW		 4339 return -EINVAL;
4340 }
4341 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
4342 rcu_read_unlock();
5d6a1b06 4343
5d6a1b06
JB		 4344 ieee80211_get_rates(sband, bss->supp_rates,
4345 bss->supp_rates_len,
4346 &rates, &basic_rates,
4347 &have_higher_than_11mbit,
2103dec1
SW		 4348 &min_rate, &min_rate_index,
4349 shift, rate_flags);
5d6a1b06
JB		 4350
4351 /*
4352 * This used to be a workaround for basic rates missing
4353 * in the association response frame. Now that we no
4354 * longer use the basic rates from there, it probably
4355 * doesn't happen any more, but keep the workaround so
4356 * in case some *other* APs are buggy in different ways
4357 * we can connect -- with a warning.
4358 */
4359 if (!basic_rates && min_rate_index >= 0) {
bdcbd8e0
JB		 4360 sdata_info(sdata,
4361 "No basic rates, using min rate instead\n");
5d6a1b06
JB		 4362 basic_rates = BIT(min_rate_index);
4363 }
4364
13e0c8e3 4365 new_sta->sta.supp_rates[cbss->channel->band] = rates;
5d6a1b06
JB		 4366 sdata->vif.bss_conf.basic_rates = basic_rates;
4367
4368 /* cf. IEEE 802.11 9.2.12 */
55de908a 4369 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
5d6a1b06
JB		 4370 have_higher_than_11mbit)
4371 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
4372 else
4373 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
4374
4375 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
4376
8c358bcd
JB		 4377 /* set timing information */
4378 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
8cef2c9d 4379 rcu_read_lock();
ef429dad
JB		 4380 ies = rcu_dereference(cbss->beacon_ies);
4381 if (ies) {
4382 const u8 *tim_ie;
4383
4384 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4385 sdata->vif.bss_conf.sync_device_ts =
4386 bss->device_ts_beacon;
4387 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4388 ies->data, ies->len);
4389 if (tim_ie && tim_ie[1] >= 2)
4390 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
4391 else
4392 sdata->vif.bss_conf.sync_dtim_count = 0;
30686bf7
JB		 4393 } else if (!ieee80211_hw_check(&sdata->local->hw,
4394 TIMING_BEACON_ONLY)) {
ef429dad
JB		 4395 ies = rcu_dereference(cbss->proberesp_ies);
4396 /* must be non-NULL since beacon IEs were NULL */
4397 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4398 sdata->vif.bss_conf.sync_device_ts =
4399 bss->device_ts_presp;
4400 sdata->vif.bss_conf.sync_dtim_count = 0;
4401 } else {
4402 sdata->vif.bss_conf.sync_tsf = 0;
4403 sdata->vif.bss_conf.sync_device_ts = 0;
4404 sdata->vif.bss_conf.sync_dtim_count = 0;
4405 }
8cef2c9d 4406 rcu_read_unlock();
8c358bcd
JB		 4407
4408 /* tell driver about BSSID, basic rates and timing */
5d6a1b06 4409 ieee80211_bss_info_change_notify(sdata,
8c358bcd
JB		 4410 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4411 BSS_CHANGED_BEACON_INT);
a1cf775d
JB		 4412
4413 if (assoc)
13e0c8e3 4414 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
a1cf775d 4415
13e0c8e3
JB		 4416 err = sta_info_insert(new_sta);
4417 new_sta = NULL;
a1cf775d 4418 if (err) {
bdcbd8e0
JB		 4419 sdata_info(sdata,
4420 "failed to insert STA entry for the AP (error %d)\n",
4421 err);
a1cf775d
JB		 4422 return err;
4423 }
4424 } else
b203ca39 4425 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
a1cf775d 4426
7d830a19
DS		 4427 /* Cancel scan to ensure that nothing interferes with connection */
4428 if (local->scanning)
4429 ieee80211_scan_cancel(local);
4430
a1cf775d
JB		 4431 return 0;
4432}
4433
77fdaa12
JB		 4434/* config hooks */
4435int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4436 struct cfg80211_auth_request *req)
9c6bd790 4437{
66e67e41
JB		 4438 struct ieee80211_local *local = sdata->local;
4439 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4440 struct ieee80211_mgd_auth_data *auth_data;
77fdaa12 4441 u16 auth_alg;
66e67e41
JB		 4442 int err;
4443
4444 /* prepare auth data structure */
9c6bd790 4445
77fdaa12
JB		 4446 switch (req->auth_type) {
4447 case NL80211_AUTHTYPE_OPEN_SYSTEM:
4448 auth_alg = WLAN_AUTH_OPEN;
4449 break;
4450 case NL80211_AUTHTYPE_SHARED_KEY:
66e67e41 4451 if (IS_ERR(local->wep_tx_tfm))
9dca9c49 4452 return -EOPNOTSUPP;
77fdaa12
JB		 4453 auth_alg = WLAN_AUTH_SHARED_KEY;
4454 break;
4455 case NL80211_AUTHTYPE_FT:
4456 auth_alg = WLAN_AUTH_FT;
4457 break;
4458 case NL80211_AUTHTYPE_NETWORK_EAP:
4459 auth_alg = WLAN_AUTH_LEAP;
4460 break;
6b8ece3a
JM		 4461 case NL80211_AUTHTYPE_SAE:
4462 auth_alg = WLAN_AUTH_SAE;
4463 break;
77fdaa12
JB		 4464 default:
4465 return -EOPNOTSUPP;
60f8b39c 4466 }
77fdaa12 4467
6b8ece3a
JM		 4468 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
4469 req->ie_len, GFP_KERNEL);
66e67e41 4470 if (!auth_data)
9c6bd790 4471 return -ENOMEM;
77fdaa12 4472
66e67e41 4473 auth_data->bss = req->bss;
77fdaa12 4474
6b8ece3a
JM		 4475 if (req->sae_data_len >= 4) {
4476 __le16 *pos = (__le16 *) req->sae_data;
4477 auth_data->sae_trans = le16_to_cpu(pos[0]);
4478 auth_data->sae_status = le16_to_cpu(pos[1]);
4479 memcpy(auth_data->data, req->sae_data + 4,
4480 req->sae_data_len - 4);
4481 auth_data->data_len += req->sae_data_len - 4;
4482 }
4483
77fdaa12 4484 if (req->ie && req->ie_len) {
6b8ece3a
JM		 4485 memcpy(&auth_data->data[auth_data->data_len],
4486 req->ie, req->ie_len);
4487 auth_data->data_len += req->ie_len;
9c6bd790 4488 }
77fdaa12 4489
fffd0934 4490 if (req->key && req->key_len) {
66e67e41
JB		 4491 auth_data->key_len = req->key_len;
4492 auth_data->key_idx = req->key_idx;
4493 memcpy(auth_data->key, req->key, req->key_len);
fffd0934
JB		 4494 }
4495
66e67e41 4496 auth_data->algorithm = auth_alg;
60f8b39c 4497
66e67e41 4498 /* try to authenticate/probe */
2a33bee2 4499
66e67e41
JB		 4500 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4501 ifmgd->assoc_data) {
4502 err = -EBUSY;
4503 goto err_free;
2a33bee2
GE		 4504 }
4505
66e67e41
JB		 4506 if (ifmgd->auth_data)
4507 ieee80211_destroy_auth_data(sdata, false);
2a33bee2 4508
66e67e41
JB		 4509 /* prep auth_data so we don't go into idle on disassoc */
4510 ifmgd->auth_data = auth_data;
af6b6374 4511
7b119dc0
JB		 4512 if (ifmgd->associated) {
4513 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4514
4515 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4516 WLAN_REASON_UNSPECIFIED,
4517 false, frame_buf);
4518
a90faa9d
EG		 4519 ieee80211_report_disconnect(sdata, frame_buf,
4520 sizeof(frame_buf), true,
4521 WLAN_REASON_UNSPECIFIED);
7b119dc0 4522 }
af6b6374 4523
bdcbd8e0 4524 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
e5b900d2 4525
c1041f10 4526 err = ieee80211_prep_connection(sdata, req->bss, false, false);
a1cf775d 4527 if (err)
66e67e41 4528 goto err_clear;
af6b6374 4529
46cad4b7 4530 err = ieee80211_auth(sdata);
66e67e41 4531 if (err) {
66e67e41
JB		 4532 sta_info_destroy_addr(sdata, req->bss->bssid);
4533 goto err_clear;
4534 }
4535
4536 /* hold our own reference */
5b112d3d 4537 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
8d61ffa5 4538 return 0;
66e67e41
JB		 4539
4540 err_clear:
c84a67a2 4541 eth_zero_addr(ifmgd->bssid);
3d2abdfd 4542 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41 4543 ifmgd->auth_data = NULL;
d01f858c
MK		 4544 mutex_lock(&sdata->local->mtx);
4545 ieee80211_vif_release_channel(sdata);
4546 mutex_unlock(&sdata->local->mtx);
66e67e41
JB		 4547 err_free:
4548 kfree(auth_data);
66e67e41 4549 return err;
af6b6374
JB		 4550}
4551
095d81ce
JB		 4552static bool ieee80211_usable_wmm_params(struct ieee80211_sub_if_data *sdata,
4553 const u8 *wmm_param, int len)
4554{
4555 const u8 *pos;
4556 size_t left;
4557
4558 if (len < 8)
4559 return false;
4560
4561 if (wmm_param[5] != 1 /* version */)
4562 return false;
4563
4564 pos = wmm_param + 8;
4565 left = len - 8;
4566
4567 for (; left >= 4; left -= 4, pos += 4) {
4568 u8 aifsn = pos[0] & 0x0f;
4569 u8 ecwmin = pos[1] & 0x0f;
4570 u8 ecwmax = (pos[1] & 0xf0) >> 4;
4571 int aci = (pos[0] >> 5) & 0x03;
4572
4573 if (aifsn < 2) {
4574 sdata_info(sdata,
4575 "AP has invalid WMM params (AIFSN=%d for ACI %d), disabling WMM\n",
4576 aifsn, aci);
4577 return false;
4578 }
4579 if (ecwmin > ecwmax) {
4580 sdata_info(sdata,
4581 "AP has invalid WMM params (ECWmin/max=%d/%d for ACI %d), disabling WMM\n",
4582 ecwmin, ecwmax, aci);
4583 return false;
4584 }
4585 }
4586
4587 return true;
4588}
4589
77fdaa12
JB		 4590int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4591 struct cfg80211_assoc_request *req)
f0706e82 4592{
66e67e41 4593 struct ieee80211_local *local = sdata->local;
77fdaa12 4594 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 4595 struct ieee80211_bss *bss = (void *)req->bss->priv;
66e67e41 4596 struct ieee80211_mgd_assoc_data *assoc_data;
c65dd147 4597 const struct cfg80211_bss_ies *beacon_ies;
4e74bfdb 4598 struct ieee80211_supported_band *sband;
b08fbbd8 4599 const u8 *ssidie, *ht_ie, *vht_ie;
2a33bee2 4600 int i, err;
c1041f10 4601 bool override = false;
f0706e82 4602
66e67e41
JB		 4603 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4604 if (!assoc_data)
4605 return -ENOMEM;
4606
9caf0364
JB		 4607 rcu_read_lock();
4608 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4609 if (!ssidie) {
4610 rcu_read_unlock();
4611 kfree(assoc_data);
4612 return -EINVAL;
4613 }
4614 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4615 assoc_data->ssid_len = ssidie[1];
4616 rcu_read_unlock();
4617
7b119dc0
JB		 4618 if (ifmgd->associated) {
4619 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4620
4621 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4622 WLAN_REASON_UNSPECIFIED,
4623 false, frame_buf);
4624
a90faa9d
EG		 4625 ieee80211_report_disconnect(sdata, frame_buf,
4626 sizeof(frame_buf), true,
4627 WLAN_REASON_UNSPECIFIED);
7b119dc0 4628 }
66e67e41
JB		 4629
4630 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4631 err = -EBUSY;
4632 goto err_free;
af6b6374 4633 }
77fdaa12 4634
66e67e41
JB		 4635 if (ifmgd->assoc_data) {
4636 err = -EBUSY;
4637 goto err_free;
4638 }
77fdaa12 4639
66e67e41
JB		 4640 if (ifmgd->auth_data) {
4641 bool match;
4642
4643 /* keep sta info, bssid if matching */
b203ca39 4644 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
66e67e41 4645 ieee80211_destroy_auth_data(sdata, match);
2a33bee2
GE		 4646 }
4647
66e67e41 4648 /* prepare assoc data */
095d81ce 4649
d8ec4433
JO		 4650 ifmgd->beacon_crc_valid = false;
4651
095d81ce
JB		 4652 assoc_data->wmm = bss->wmm_used &&
4653 (local->hw.queues >= IEEE80211_NUM_ACS);
4654 if (assoc_data->wmm) {
4655 /* try to check validity of WMM params IE */
4656 const struct cfg80211_bss_ies *ies;
4657 const u8 *wp, *start, *end;
4658
4659 rcu_read_lock();
4660 ies = rcu_dereference(req->bss->ies);
4661 start = ies->data;
4662 end = start + ies->len;
4663
4664 while (true) {
4665 wp = cfg80211_find_vendor_ie(
4666 WLAN_OUI_MICROSOFT,
4667 WLAN_OUI_TYPE_MICROSOFT_WMM,
4668 start, end - start);
4669 if (!wp)
4670 break;
4671 start = wp + wp[1] + 2;
4672 /* if this IE is too short, try the next */
4673 if (wp[1] <= 4)
4674 continue;
4675 /* if this IE is WMM params, we found what we wanted */
4676 if (wp[6] == 1)
4677 break;
4678 }
4679
4680 if (!wp || !ieee80211_usable_wmm_params(sdata, wp + 2,
4681 wp[1] - 2)) {
4682 assoc_data->wmm = false;
4683 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
4684 }
4685 rcu_read_unlock();
4686 }
4687
de5036aa
JB		 4688 /*
4689 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4690 * We still associate in non-HT mode (11a/b/g) if any one of these
4691 * ciphers is configured as pairwise.
4692 * We can set this to true for non-11n hardware, that'll be checked
4693 * separately along with the peer capabilities.
4694 */
1c4cb928 4695 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
77fdaa12
JB		 4696 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4697 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
1c4cb928 4698 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
a8243b72 4699 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
d545daba 4700 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
1c4cb928 4701 netdev_info(sdata->dev,
d545daba 4702 "disabling HT/VHT due to WEP/TKIP use\n");
1c4cb928
JB		 4703 }
4704 }
77fdaa12 4705
4e74bfdb
JB		 4706 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4707 sband = local->hw.wiphy->bands[req->bss->channel->band];
4708 if (!sband->ht_cap.ht_supported ||
095d81ce
JB		 4709 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4710 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
a8243b72 4711 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
095d81ce
JB		 4712 if (!bss->wmm_used &&
4713 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
1b49de26
JB		 4714 netdev_info(sdata->dev,
4715 "disabling HT as WMM/QoS is not supported by the AP\n");
1c4cb928 4716 }
4e74bfdb 4717
d545daba
MP		 4718 /* disable VHT if we don't support it or the AP doesn't use WMM */
4719 if (!sband->vht_cap.vht_supported ||
095d81ce
JB		 4720 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4721 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
d545daba 4722 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
095d81ce
JB		 4723 if (!bss->wmm_used &&
4724 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
1b49de26
JB		 4725 netdev_info(sdata->dev,
4726 "disabling VHT as WMM/QoS is not supported by the AP\n");
d545daba
MP		 4727 }
4728
ef96a842
BG		 4729 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4730 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4731 sizeof(ifmgd->ht_capa_mask));
4732
dd5ecfea
JB		 4733 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4734 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4735 sizeof(ifmgd->vht_capa_mask));
4736
77fdaa12 4737 if (req->ie && req->ie_len) {
66e67e41
JB		 4738 memcpy(assoc_data->ie, req->ie, req->ie_len);
4739 assoc_data->ie_len = req->ie_len;
4740 }
f679f65d 4741
66e67e41 4742 assoc_data->bss = req->bss;
f679f65d 4743
af6b6374
JB		 4744 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4745 if (ifmgd->powersave)
04ecd257 4746 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
af6b6374 4747 else
04ecd257 4748 sdata->smps_mode = IEEE80211_SMPS_OFF;
af6b6374 4749 } else
04ecd257 4750 sdata->smps_mode = ifmgd->req_smps;
af6b6374 4751
66e67e41 4752 assoc_data->capability = req->bss->capability;
66e67e41
JB		 4753 assoc_data->supp_rates = bss->supp_rates;
4754 assoc_data->supp_rates_len = bss->supp_rates_len;
9dde6423 4755
9caf0364 4756 rcu_read_lock();
9dde6423
JB		 4757 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4758 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4759 assoc_data->ap_ht_param =
4760 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4761 else
a8243b72 4762 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
b08fbbd8
JB		 4763 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4764 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4765 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4766 sizeof(struct ieee80211_vht_cap));
4767 else
4768 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
9caf0364 4769 rcu_read_unlock();
63f170e0 4770
848955cc 4771 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
30686bf7 4772 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK),
848955cc
JB		 4773 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
4774 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
4775
ab13315a 4776 if (bss->wmm_used && bss->uapsd_supported &&
848955cc 4777 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
76f0303d 4778 assoc_data->uapsd = true;
ab13315a
KV		 4779 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4780 } else {
76f0303d 4781 assoc_data->uapsd = false;
ab13315a
KV		 4782 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4783 }
4784
77fdaa12 4785 if (req->prev_bssid)
66e67e41 4786 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12
JB		 4787
4788 if (req->use_mfp) {
4789 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4790 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4791 } else {
4792 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4793 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4794 }
4795
cd2f5dd7
AK		 4796 if (req->flags & ASSOC_REQ_USE_RRM)
4797 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
4798 else
4799 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
4800
77fdaa12
JB		 4801 if (req->crypto.control_port)
4802 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4803 else
4804 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4805
a621fa4d
JB		 4806 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4807 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
2475b1cc
MS		 4808 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
4809 sdata->vif.type);
a621fa4d 4810
66e67e41
JB		 4811 /* kick off associate process */
4812
4813 ifmgd->assoc_data = assoc_data;
826262c3 4814 ifmgd->dtim_period = 0;
989c6505 4815 ifmgd->have_beacon = false;
66e67e41 4816
c1041f10
CRI		 4817 /* override HT/VHT configuration only if the AP and we support it */
4818 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
4819 struct ieee80211_sta_ht_cap sta_ht_cap;
4820
4821 if (req->flags & ASSOC_REQ_DISABLE_HT)
4822 override = true;
4823
4824 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
4825 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
4826
4827 /* check for 40 MHz disable override */
4828 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) &&
4829 sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
4830 !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
4831 override = true;
4832
4833 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4834 req->flags & ASSOC_REQ_DISABLE_VHT)
4835 override = true;
4836 }
4837
4838 if (req->flags & ASSOC_REQ_DISABLE_HT) {
4839 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4840 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4841 }
4842
4843 if (req->flags & ASSOC_REQ_DISABLE_VHT)
4844 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4845
4846 err = ieee80211_prep_connection(sdata, req->bss, true, override);
a1cf775d
JB		 4847 if (err)
4848 goto err_clear;
66e67e41 4849
c65dd147
EG		 4850 rcu_read_lock();
4851 beacon_ies = rcu_dereference(req->bss->beacon_ies);
826262c3 4852
30686bf7 4853 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) &&
c65dd147
EG		 4854 !beacon_ies) {
4855 /*
4856 * Wait up to one beacon interval ...
4857 * should this be more if we miss one?
4858 */
4859 sdata_info(sdata, "waiting for beacon from %pM\n",
4860 ifmgd->bssid);
4861 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
89afe614 4862 assoc_data->timeout_started = true;
c65dd147
EG		 4863 assoc_data->need_beacon = true;
4864 } else if (beacon_ies) {
4865 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4866 beacon_ies->data,
4867 beacon_ies->len);
ef429dad
JB		 4868 u8 dtim_count = 0;
4869
c65dd147
EG		 4870 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4871 const struct ieee80211_tim_ie *tim;
4872 tim = (void *)(tim_ie + 2);
4873 ifmgd->dtim_period = tim->dtim_period;
ef429dad 4874 dtim_count = tim->dtim_count;
826262c3 4875 }
989c6505 4876 ifmgd->have_beacon = true;
66e67e41 4877 assoc_data->timeout = jiffies;
89afe614 4878 assoc_data->timeout_started = true;
ef429dad 4879
30686bf7 4880 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
ef429dad
JB		 4881 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4882 sdata->vif.bss_conf.sync_device_ts =
4883 bss->device_ts_beacon;
4884 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4885 }
c65dd147
EG		 4886 } else {
4887 assoc_data->timeout = jiffies;
89afe614 4888 assoc_data->timeout_started = true;
66e67e41 4889 }
c65dd147
EG		 4890 rcu_read_unlock();
4891
8d61ffa5 4892 run_again(sdata, assoc_data->timeout);
66e67e41 4893
fcff4f10
PS		 4894 if (bss->corrupt_data) {
4895 char *corrupt_type = "data";
4896 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4897 if (bss->corrupt_data &
4898 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4899 corrupt_type = "beacon and probe response";
4900 else
4901 corrupt_type = "beacon";
4902 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4903 corrupt_type = "probe response";
bdcbd8e0
JB		 4904 sdata_info(sdata, "associating with AP with corrupt %s\n",
4905 corrupt_type);
fcff4f10
PS		 4906 }
4907
8d61ffa5 4908 return 0;
66e67e41 4909 err_clear:
c84a67a2 4910 eth_zero_addr(ifmgd->bssid);
3d2abdfd 4911 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 4912 ifmgd->assoc_data = NULL;
4913 err_free:
4914 kfree(assoc_data);
66e67e41 4915 return err;
f0706e82
JB		 4916}
4917
77fdaa12 4918int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
63c9c5e7 4919 struct cfg80211_deauth_request *req)
f0706e82 4920{
46900298 4921 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 4922 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
6863255b 4923 bool tx = !req->local_state_change;
f0706e82 4924
c9c3a060
JB		 4925 if (ifmgd->auth_data &&
4926 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
4927 sdata_info(sdata,
4928 "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
4929 req->bssid, req->reason_code,
4930 ieee80211_get_reason_code_string(req->reason_code));
0ff71613 4931
8c7d857c 4932 drv_mgd_prepare_tx(sdata->local, sdata);
37ad3888
JB		 4933 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4934 IEEE80211_STYPE_DEAUTH,
6863255b 4935 req->reason_code, tx,
37ad3888 4936 frame_buf);
86552017 4937 ieee80211_destroy_auth_data(sdata, false);
a90faa9d
EG		 4938 ieee80211_report_disconnect(sdata, frame_buf,
4939 sizeof(frame_buf), true,
4940 req->reason_code);
86552017 4941
c9c3a060 4942 return 0;
8c7d857c
EG		 4943 }
4944
86552017
JB		 4945 if (ifmgd->associated &&
4946 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
c9c3a060
JB		 4947 sdata_info(sdata,
4948 "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
4949 req->bssid, req->reason_code,
4950 ieee80211_get_reason_code_string(req->reason_code));
4951
86552017
JB		 4952 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4953 req->reason_code, tx, frame_buf);
a90faa9d
EG		 4954 ieee80211_report_disconnect(sdata, frame_buf,
4955 sizeof(frame_buf), true,
4956 req->reason_code);
c9c3a060
JB		 4957 return 0;
4958 }
86552017 4959
c9c3a060 4960 return -ENOTCONN;
f0706e82 4961}
84363e6e 4962
77fdaa12 4963int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 4964 struct cfg80211_disassoc_request *req)
9c6bd790 4965{
77fdaa12 4966 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 4967 u8 bssid[ETH_ALEN];
6ae16775 4968 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
9c6bd790 4969
8d8b261a
JB		 4970 /*
4971 * cfg80211 should catch this ... but it's racy since
4972 * we can receive a disassoc frame, process it, hand it
4973 * to cfg80211 while that's in a locked section already
4974 * trying to tell us that the user wants to disconnect.
4975 */
8d61ffa5 4976 if (ifmgd->associated != req->bss)
77fdaa12 4977 return -ENOLINK;
77fdaa12 4978
bdcbd8e0 4979 sdata_info(sdata,
dfa1ad29
CO		 4980 "disassociating from %pM by local choice (Reason: %u=%s)\n",
4981 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
0ff71613 4982
e69e95db 4983 memcpy(bssid, req->bss->bssid, ETH_ALEN);
37ad3888
JB		 4984 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4985 req->reason_code, !req->local_state_change,
4986 frame_buf);
10f644a4 4987
a90faa9d
EG		 4988 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
4989 req->reason_code);
bc83b681 4990
10f644a4
JB		 4991 return 0;
4992}
026331c4 4993
afa762f6 4994void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
54e4ffb2
JB		 4995{
4996 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4997
49921859
BG		 4998 /*
4999 * Make sure some work items will not run after this,
5000 * they will not do anything but might not have been
5001 * cancelled when disconnecting.
5002 */
5003 cancel_work_sync(&ifmgd->monitor_work);
5004 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5005 cancel_work_sync(&ifmgd->request_smps_work);
5006 cancel_work_sync(&ifmgd->csa_connection_drop_work);
5007 cancel_work_sync(&ifmgd->chswitch_work);
81dd2b88 5008 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
49921859 5009
8d61ffa5 5010 sdata_lock(sdata);
959867fa
JB		 5011 if (ifmgd->assoc_data) {
5012 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
54e4ffb2 5013 ieee80211_destroy_assoc_data(sdata, false);
959867fa
JB		 5014 cfg80211_assoc_timeout(sdata->dev, bss);
5015 }
54e4ffb2
JB		 5016 if (ifmgd->auth_data)
5017 ieee80211_destroy_auth_data(sdata, false);
1277b4a9
LK		 5018 spin_lock_bh(&ifmgd->teardown_lock);
5019 if (ifmgd->teardown_skb) {
5020 kfree_skb(ifmgd->teardown_skb);
5021 ifmgd->teardown_skb = NULL;
5022 ifmgd->orig_teardown_skb = NULL;
5023 }
5024 spin_unlock_bh(&ifmgd->teardown_lock);
54e4ffb2 5025 del_timer_sync(&ifmgd->timer);
8d61ffa5 5026 sdata_unlock(sdata);
54e4ffb2
JB		 5027}
5028
a97c13c3
JO		 5029void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
5030 enum nl80211_cqm_rssi_threshold_event rssi_event,
5031 gfp_t gfp)
5032{
5033 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5034
b5878a2d
JB		 5035 trace_api_cqm_rssi_notify(sdata, rssi_event);
5036
a97c13c3
JO		 5037 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
5038}
5039EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
98f03342
JB		 5040
5041void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
5042{
5043 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5044
5045 trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
5046
5047 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
5048}
5049EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);
Linux kernel - Deliverables
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