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mac80211: port CCMP to cryptoapi's CCM driver
[mirror_ubuntu-jammy-kernel.git] / net / mac80211 / mlme.c
CommitLineData
f0706e82
JB		 1/*
2 * BSS client mode implementation
5394af4d 3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
f0706e82
JB		 4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
5b323edb 14#include <linux/delay.h>
f0706e82
JB		 15#include <linux/if_ether.h>
16#include <linux/skbuff.h>
f0706e82 17#include <linux/if_arp.h>
f0706e82 18#include <linux/etherdevice.h>
d9b93842 19#include <linux/moduleparam.h>
d0709a65 20#include <linux/rtnetlink.h>
e8db0be1 21#include <linux/pm_qos.h>
d91f36db 22#include <linux/crc32.h>
5a0e3ad6 23#include <linux/slab.h>
bc3b2d7f 24#include <linux/export.h>
f0706e82 25#include <net/mac80211.h>
472dbc45 26#include <asm/unaligned.h>
60f8b39c 27
f0706e82 28#include "ieee80211_i.h"
24487981 29#include "driver-ops.h"
2c8dccc7
JB		 30#include "rate.h"
31#include "led.h"
f0706e82 32
1672c0e3 33#define IEEE80211_AUTH_TIMEOUT (HZ / 5)
cb236d2d 34#define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2)
1672c0e3
JB		 35#define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10)
36#define IEEE80211_AUTH_MAX_TRIES 3
37#define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
38#define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
cb236d2d 39#define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2)
1672c0e3
JB		 40#define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10)
41#define IEEE80211_ASSOC_MAX_TRIES 3
66e67e41 42
180205bd
BG		 43static int max_nullfunc_tries = 2;
44module_param(max_nullfunc_tries, int, 0644);
45MODULE_PARM_DESC(max_nullfunc_tries,
46 "Maximum nullfunc tx tries before disconnecting (reason 4).");
47
48static int max_probe_tries = 5;
49module_param(max_probe_tries, int, 0644);
50MODULE_PARM_DESC(max_probe_tries,
51 "Maximum probe tries before disconnecting (reason 4).");
b291ba11
JB		 52
53/*
7ccc8bd7
FF		 54 * Beacon loss timeout is calculated as N frames times the
55 * advertised beacon interval. This may need to be somewhat
56 * higher than what hardware might detect to account for
57 * delays in the host processing frames. But since we also
58 * probe on beacon miss before declaring the connection lost
59 * default to what we want.
b291ba11 60 */
59c1ec2b
BG		 61static int beacon_loss_count = 7;
62module_param(beacon_loss_count, int, 0644);
63MODULE_PARM_DESC(beacon_loss_count,
64 "Number of beacon intervals before we decide beacon was lost.");
7ccc8bd7 65
b291ba11
JB		 66/*
67 * Time the connection can be idle before we probe
68 * it to see if we can still talk to the AP.
69 */
d1c5091f 70#define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
b291ba11
JB		 71/*
72 * Time we wait for a probe response after sending
73 * a probe request because of beacon loss or for
74 * checking the connection still works.
75 */
180205bd
BG		 76static int probe_wait_ms = 500;
77module_param(probe_wait_ms, int, 0644);
78MODULE_PARM_DESC(probe_wait_ms,
79 "Maximum time(ms) to wait for probe response"
80 " before disconnecting (reason 4).");
f0706e82 81
17e4ec14
JM		 82/*
83 * Weight given to the latest Beacon frame when calculating average signal
84 * strength for Beacon frames received in the current BSS. This must be
85 * between 1 and 15.
86 */
87#define IEEE80211_SIGNAL_AVE_WEIGHT 3
88
391a200a
JM		 89/*
90 * How many Beacon frames need to have been used in average signal strength
91 * before starting to indicate signal change events.
92 */
93#define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
94
ca386f31
JB		 95/*
96 * We can have multiple work items (and connection probing)
97 * scheduling this timer, but we need to take care to only
98 * reschedule it when it should fire _earlier_ than it was
99 * asked for before, or if it's not pending right now. This
100 * function ensures that. Note that it then is required to
101 * run this function for all timeouts after the first one
102 * has happened -- the work that runs from this timer will
103 * do that.
104 */
8d61ffa5
JB		 105static void run_again(struct ieee80211_sub_if_data *sdata,
106 unsigned long timeout)
ca386f31 107{
8d61ffa5 108 sdata_assert_lock(sdata);
ca386f31 109
8d61ffa5
JB		 110 if (!timer_pending(&sdata->u.mgd.timer) ||
111 time_before(timeout, sdata->u.mgd.timer.expires))
112 mod_timer(&sdata->u.mgd.timer, timeout);
ca386f31
JB		 113}
114
d3a910a8 115void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
b291ba11 116{
c1288b12 117 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
b291ba11
JB		 118 return;
119
7eeff74c
JB		 120 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
121 return;
122
b291ba11 123 mod_timer(&sdata->u.mgd.bcn_mon_timer,
7ccc8bd7 124 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
b291ba11
JB		 125}
126
be099e82
LR		 127void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
128{
0c699c3a
LR		 129 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
130
8628172f
SG		 131 if (unlikely(!sdata->u.mgd.associated))
132 return;
133
be099e82
LR		 134 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
135 return;
136
137 mod_timer(&sdata->u.mgd.conn_mon_timer,
138 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
0c699c3a
LR		 139
140 ifmgd->probe_send_count = 0;
be099e82
LR		 141}
142
5484e237 143static int ecw2cw(int ecw)
60f8b39c 144{
5484e237 145 return (1 << ecw) - 1;
60f8b39c
JB		 146}
147
6565ec9b
JB		 148static u32
149ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
150 struct ieee80211_supported_band *sband,
151 struct ieee80211_channel *channel,
152 const struct ieee80211_ht_operation *ht_oper,
153 const struct ieee80211_vht_operation *vht_oper,
5cdaed1e 154 struct cfg80211_chan_def *chandef, bool tracking)
6565ec9b 155{
5cdaed1e 156 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6565ec9b
JB		 157 struct cfg80211_chan_def vht_chandef;
158 u32 ht_cfreq, ret;
159
160 chandef->chan = channel;
161 chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
162 chandef->center_freq1 = channel->center_freq;
163 chandef->center_freq2 = 0;
164
165 if (!ht_oper || !sband->ht_cap.ht_supported) {
166 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
167 goto out;
168 }
169
170 chandef->width = NL80211_CHAN_WIDTH_20;
171
172 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
173 channel->band);
174 /* check that channel matches the right operating channel */
5cdaed1e 175 if (!tracking && channel->center_freq != ht_cfreq) {
6565ec9b
JB		 176 /*
177 * It's possible that some APs are confused here;
178 * Netgear WNDR3700 sometimes reports 4 higher than
179 * the actual channel in association responses, but
180 * since we look at probe response/beacon data here
181 * it should be OK.
182 */
5cdaed1e
JB		 183 sdata_info(sdata,
184 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
185 channel->center_freq, ht_cfreq,
186 ht_oper->primary_chan, channel->band);
6565ec9b
JB		 187 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
188 goto out;
189 }
190
191 /* check 40 MHz support, if we have it */
192 if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
193 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
194 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
195 chandef->width = NL80211_CHAN_WIDTH_40;
196 chandef->center_freq1 += 10;
197 break;
198 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
199 chandef->width = NL80211_CHAN_WIDTH_40;
200 chandef->center_freq1 -= 10;
201 break;
202 }
203 } else {
204 /* 40 MHz (and 80 MHz) must be supported for VHT */
205 ret = IEEE80211_STA_DISABLE_VHT;
85220d71
JB		 206 /* also mark 40 MHz disabled */
207 ret |= IEEE80211_STA_DISABLE_40MHZ;
6565ec9b
JB		 208 goto out;
209 }
210
211 if (!vht_oper || !sband->vht_cap.vht_supported) {
212 ret = IEEE80211_STA_DISABLE_VHT;
213 goto out;
214 }
215
216 vht_chandef.chan = channel;
217 vht_chandef.center_freq1 =
218 ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx,
219 channel->band);
220 vht_chandef.center_freq2 = 0;
221
6565ec9b
JB		 222 switch (vht_oper->chan_width) {
223 case IEEE80211_VHT_CHANWIDTH_USE_HT:
224 vht_chandef.width = chandef->width;
225 break;
226 case IEEE80211_VHT_CHANWIDTH_80MHZ:
227 vht_chandef.width = NL80211_CHAN_WIDTH_80;
228 break;
229 case IEEE80211_VHT_CHANWIDTH_160MHZ:
230 vht_chandef.width = NL80211_CHAN_WIDTH_160;
231 break;
232 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
233 vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
6553bf04
JB		 234 vht_chandef.center_freq2 =
235 ieee80211_channel_to_frequency(
236 vht_oper->center_freq_seg2_idx,
237 channel->band);
6565ec9b
JB		 238 break;
239 default:
5cdaed1e 240 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
30eb1dc2
JB		 241 sdata_info(sdata,
242 "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
243 vht_oper->chan_width);
6565ec9b
JB		 244 ret = IEEE80211_STA_DISABLE_VHT;
245 goto out;
246 }
247
248 if (!cfg80211_chandef_valid(&vht_chandef)) {
5cdaed1e 249 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
30eb1dc2
JB		 250 sdata_info(sdata,
251 "AP VHT information is invalid, disable VHT\n");
6565ec9b
JB		 252 ret = IEEE80211_STA_DISABLE_VHT;
253 goto out;
254 }
255
256 if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
257 ret = 0;
258 goto out;
259 }
260
261 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
5cdaed1e 262 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
30eb1dc2
JB		 263 sdata_info(sdata,
264 "AP VHT information doesn't match HT, disable VHT\n");
6565ec9b
JB		 265 ret = IEEE80211_STA_DISABLE_VHT;
266 goto out;
267 }
268
269 *chandef = vht_chandef;
270
271 ret = 0;
272
273out:
586e01ed
JB		 274 /* don't print the message below for VHT mismatch if VHT is disabled */
275 if (ret & IEEE80211_STA_DISABLE_VHT)
276 vht_chandef = *chandef;
277
ddfe49b4
JB		 278 /*
279 * Ignore the DISABLED flag when we're already connected and only
280 * tracking the APs beacon for bandwidth changes - otherwise we
281 * might get disconnected here if we connect to an AP, update our
282 * regulatory information based on the AP's country IE and the
283 * information we have is wrong/outdated and disables the channel
284 * that we're actually using for the connection to the AP.
285 */
6565ec9b 286 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
ddfe49b4
JB		 287 tracking ? 0 :
288 IEEE80211_CHAN_DISABLED)) {
6565ec9b
JB		 289 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
290 ret = IEEE80211_STA_DISABLE_HT |
291 IEEE80211_STA_DISABLE_VHT;
b56e4b85 292 break;
6565ec9b
JB		 293 }
294
e6b7cde4 295 ret |= ieee80211_chandef_downgrade(chandef);
6565ec9b
JB		 296 }
297
5cdaed1e 298 if (chandef->width != vht_chandef.width && !tracking)
6565ec9b
JB		 299 sdata_info(sdata,
300 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
301
302 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
303 return ret;
304}
305
30eb1dc2
JB		 306static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
307 struct sta_info *sta,
308 const struct ieee80211_ht_operation *ht_oper,
309 const struct ieee80211_vht_operation *vht_oper,
310 const u8 *bssid, u32 *changed)
d5522e03
JB		 311{
312 struct ieee80211_local *local = sdata->local;
30eb1dc2 313 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d5522e03 314 struct ieee80211_supported_band *sband;
55de908a 315 struct ieee80211_channel *chan;
30eb1dc2 316 struct cfg80211_chan_def chandef;
9ed6bcce 317 u16 ht_opmode;
30eb1dc2
JB		 318 u32 flags;
319 enum ieee80211_sta_rx_bandwidth new_sta_bw;
320 int ret;
d5522e03 321
30eb1dc2
JB		 322 /* if HT was/is disabled, don't track any bandwidth changes */
323 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
1128958d
JB		 324 return 0;
325
30eb1dc2
JB		 326 /* don't check VHT if we associated as non-VHT station */
327 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
328 vht_oper = NULL;
329
330 if (WARN_ON_ONCE(!sta))
331 return -EINVAL;
332
f2d9330e 333 chan = sdata->vif.bss_conf.chandef.chan;
55de908a 334 sband = local->hw.wiphy->bands[chan->band];
d5522e03 335
30eb1dc2
JB		 336 /* calculate new channel (type) based on HT/VHT operation IEs */
337 flags = ieee80211_determine_chantype(sdata, sband, chan, ht_oper,
5cdaed1e 338 vht_oper, &chandef, true);
30eb1dc2
JB		 339
340 /*
341 * Downgrade the new channel if we associated with restricted
342 * capabilities. For example, if we associated as a 20 MHz STA
343 * to a 40 MHz AP (due to regulatory, capabilities or config
344 * reasons) then switching to a 40 MHz channel now won't do us
345 * any good -- we couldn't use it with the AP.
346 */
347 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
348 chandef.width == NL80211_CHAN_WIDTH_80P80)
e6b7cde4 349 flags |= ieee80211_chandef_downgrade(&chandef);
30eb1dc2
JB		 350 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
351 chandef.width == NL80211_CHAN_WIDTH_160)
e6b7cde4 352 flags |= ieee80211_chandef_downgrade(&chandef);
30eb1dc2
JB		 353 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
354 chandef.width > NL80211_CHAN_WIDTH_20)
e6b7cde4 355 flags |= ieee80211_chandef_downgrade(&chandef);
30eb1dc2
JB		 356
357 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
358 return 0;
359
360 sdata_info(sdata,
361 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
362 ifmgd->bssid, chandef.chan->center_freq, chandef.width,
363 chandef.center_freq1, chandef.center_freq2);
364
365 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
366 IEEE80211_STA_DISABLE_VHT |
367 IEEE80211_STA_DISABLE_40MHZ |
368 IEEE80211_STA_DISABLE_80P80MHZ |
369 IEEE80211_STA_DISABLE_160MHZ)) ||
370 !cfg80211_chandef_valid(&chandef)) {
371 sdata_info(sdata,
372 "AP %pM changed bandwidth in a way we can't support - disconnect\n",
373 ifmgd->bssid);
374 return -EINVAL;
375 }
376
377 switch (chandef.width) {
378 case NL80211_CHAN_WIDTH_20_NOHT:
379 case NL80211_CHAN_WIDTH_20:
380 new_sta_bw = IEEE80211_STA_RX_BW_20;
381 break;
4bf88530 382 case NL80211_CHAN_WIDTH_40:
30eb1dc2 383 new_sta_bw = IEEE80211_STA_RX_BW_40;
64f68e5d 384 break;
30eb1dc2
JB		 385 case NL80211_CHAN_WIDTH_80:
386 new_sta_bw = IEEE80211_STA_RX_BW_80;
387 break;
388 case NL80211_CHAN_WIDTH_80P80:
389 case NL80211_CHAN_WIDTH_160:
390 new_sta_bw = IEEE80211_STA_RX_BW_160;
64f68e5d 391 break;
30eb1dc2
JB		 392 default:
393 return -EINVAL;
64f68e5d 394 }
d5522e03 395
30eb1dc2
JB		 396 if (new_sta_bw > sta->cur_max_bandwidth)
397 new_sta_bw = sta->cur_max_bandwidth;
64f68e5d 398
30eb1dc2
JB		 399 if (new_sta_bw < sta->sta.bandwidth) {
400 sta->sta.bandwidth = new_sta_bw;
401 rate_control_rate_update(local, sband, sta,
402 IEEE80211_RC_BW_CHANGED);
403 }
64f68e5d 404
30eb1dc2
JB		 405 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
406 if (ret) {
407 sdata_info(sdata,
408 "AP %pM changed bandwidth to incompatible one - disconnect\n",
409 ifmgd->bssid);
410 return ret;
411 }
7cc44ed4 412
30eb1dc2
JB		 413 if (new_sta_bw > sta->sta.bandwidth) {
414 sta->sta.bandwidth = new_sta_bw;
415 rate_control_rate_update(local, sband, sta,
416 IEEE80211_RC_BW_CHANGED);
0aaffa9b 417 }
d5522e03 418
074d46d1 419 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
d5522e03
JB		 420
421 /* if bss configuration changed store the new one */
30eb1dc2
JB		 422 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
423 *changed |= BSS_CHANGED_HT;
9ed6bcce 424 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
d5522e03
JB		 425 }
426
30eb1dc2 427 return 0;
d5522e03
JB		 428}
429
9c6bd790
JB		 430/* frame sending functions */
431
66e67e41 432static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
9dde6423 433 struct sk_buff *skb, u8 ap_ht_param,
66e67e41
JB		 434 struct ieee80211_supported_band *sband,
435 struct ieee80211_channel *channel,
436 enum ieee80211_smps_mode smps)
437{
66e67e41
JB		 438 u8 *pos;
439 u32 flags = channel->flags;
440 u16 cap;
441 struct ieee80211_sta_ht_cap ht_cap;
442
443 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
444
66e67e41
JB		 445 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
446 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
447
66e67e41
JB		 448 /* determine capability flags */
449 cap = ht_cap.cap;
450
9dde6423 451 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
66e67e41
JB		 452 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
453 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
454 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
455 cap &= ~IEEE80211_HT_CAP_SGI_40;
456 }
457 break;
458 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
459 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
460 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
461 cap &= ~IEEE80211_HT_CAP_SGI_40;
462 }
463 break;
464 }
465
24398e39
JB		 466 /*
467 * If 40 MHz was disabled associate as though we weren't
468 * capable of 40 MHz -- some broken APs will never fall
469 * back to trying to transmit in 20 MHz.
470 */
471 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
472 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
473 cap &= ~IEEE80211_HT_CAP_SGI_40;
474 }
475
66e67e41
JB		 476 /* set SM PS mode properly */
477 cap &= ~IEEE80211_HT_CAP_SM_PS;
478 switch (smps) {
479 case IEEE80211_SMPS_AUTOMATIC:
480 case IEEE80211_SMPS_NUM_MODES:
481 WARN_ON(1);
482 case IEEE80211_SMPS_OFF:
483 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
484 IEEE80211_HT_CAP_SM_PS_SHIFT;
485 break;
486 case IEEE80211_SMPS_STATIC:
487 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
488 IEEE80211_HT_CAP_SM_PS_SHIFT;
489 break;
490 case IEEE80211_SMPS_DYNAMIC:
491 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
492 IEEE80211_HT_CAP_SM_PS_SHIFT;
493 break;
494 }
495
496 /* reserve and fill IE */
497 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
498 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
499}
500
d545daba
MP		 501static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
502 struct sk_buff *skb,
b08fbbd8
JB		 503 struct ieee80211_supported_band *sband,
504 struct ieee80211_vht_cap *ap_vht_cap)
d545daba
MP		 505{
506 u8 *pos;
507 u32 cap;
508 struct ieee80211_sta_vht_cap vht_cap;
509
510 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
511
512 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
dd5ecfea 513 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
d545daba
MP		 514
515 /* determine capability flags */
516 cap = vht_cap.cap;
517
f2d9d270
JB		 518 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
519 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ;
520 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
521 }
522
523 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
524 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
525 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
526 }
527
b08fbbd8
JB		 528 /*
529 * Some APs apparently get confused if our capabilities are better
530 * than theirs, so restrict what we advertise in the assoc request.
531 */
532 if (!(ap_vht_cap->vht_cap_info &
533 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
534 cap &= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE;
535
d545daba 536 /* reserve and fill IE */
d4950281 537 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
d545daba
MP		 538 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
539}
540
66e67e41
JB		 541static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
542{
543 struct ieee80211_local *local = sdata->local;
544 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
545 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
546 struct sk_buff *skb;
547 struct ieee80211_mgmt *mgmt;
548 u8 *pos, qos_info;
549 size_t offset = 0, noffset;
2103dec1 550 int i, count, rates_len, supp_rates_len, shift;
66e67e41
JB		 551 u16 capab;
552 struct ieee80211_supported_band *sband;
55de908a
JB		 553 struct ieee80211_chanctx_conf *chanctx_conf;
554 struct ieee80211_channel *chan;
2103dec1 555 u32 rate_flags, rates = 0;
66e67e41 556
8d61ffa5 557 sdata_assert_lock(sdata);
66e67e41 558
55de908a
JB		 559 rcu_read_lock();
560 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
561 if (WARN_ON(!chanctx_conf)) {
562 rcu_read_unlock();
563 return;
564 }
4bf88530 565 chan = chanctx_conf->def.chan;
2103dec1 566 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
55de908a
JB		 567 rcu_read_unlock();
568 sband = local->hw.wiphy->bands[chan->band];
2103dec1 569 shift = ieee80211_vif_get_shift(&sdata->vif);
66e67e41
JB		 570
571 if (assoc_data->supp_rates_len) {
572 /*
573 * Get all rates supported by the device and the AP as
574 * some APs don't like getting a superset of their rates
575 * in the association request (e.g. D-Link DAP 1353 in
576 * b-only mode)...
577 */
2103dec1
SW		 578 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
579 assoc_data->supp_rates,
580 assoc_data->supp_rates_len,
581 &rates);
66e67e41
JB		 582 } else {
583 /*
584 * In case AP not provide any supported rates information
585 * before association, we send information element(s) with
586 * all rates that we support.
587 */
2103dec1
SW		 588 rates_len = 0;
589 for (i = 0; i < sband->n_bitrates; i++) {
590 if ((rate_flags & sband->bitrates[i].flags)
591 != rate_flags)
592 continue;
593 rates |= BIT(i);
594 rates_len++;
595 }
66e67e41
JB		 596 }
597
598 skb = alloc_skb(local->hw.extra_tx_headroom +
599 sizeof(*mgmt) + /* bit too much but doesn't matter */
600 2 + assoc_data->ssid_len + /* SSID */
601 4 + rates_len + /* (extended) rates */
602 4 + /* power capability */
603 2 + 2 * sband->n_channels + /* supported channels */
604 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
d4950281 605 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
66e67e41
JB		 606 assoc_data->ie_len + /* extra IEs */
607 9, /* WMM */
608 GFP_KERNEL);
609 if (!skb)
610 return;
611
612 skb_reserve(skb, local->hw.extra_tx_headroom);
613
614 capab = WLAN_CAPABILITY_ESS;
615
616 if (sband->band == IEEE80211_BAND_2GHZ) {
617 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
618 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
619 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
620 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
621 }
622
623 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
624 capab |= WLAN_CAPABILITY_PRIVACY;
625
626 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
627 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
628 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
629
630 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
631 memset(mgmt, 0, 24);
632 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
633 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
634 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
635
636 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
637 skb_put(skb, 10);
638 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
639 IEEE80211_STYPE_REASSOC_REQ);
640 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
641 mgmt->u.reassoc_req.listen_interval =
642 cpu_to_le16(local->hw.conf.listen_interval);
643 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
644 ETH_ALEN);
645 } else {
646 skb_put(skb, 4);
647 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
648 IEEE80211_STYPE_ASSOC_REQ);
649 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
650 mgmt->u.assoc_req.listen_interval =
651 cpu_to_le16(local->hw.conf.listen_interval);
652 }
653
654 /* SSID */
655 pos = skb_put(skb, 2 + assoc_data->ssid_len);
656 *pos++ = WLAN_EID_SSID;
657 *pos++ = assoc_data->ssid_len;
658 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
659
660 /* add all rates which were marked to be used above */
661 supp_rates_len = rates_len;
662 if (supp_rates_len > 8)
663 supp_rates_len = 8;
664
665 pos = skb_put(skb, supp_rates_len + 2);
666 *pos++ = WLAN_EID_SUPP_RATES;
667 *pos++ = supp_rates_len;
668
669 count = 0;
670 for (i = 0; i < sband->n_bitrates; i++) {
671 if (BIT(i) & rates) {
2103dec1
SW		 672 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
673 5 * (1 << shift));
674 *pos++ = (u8) rate;
66e67e41
JB		 675 if (++count == 8)
676 break;
677 }
678 }
679
680 if (rates_len > count) {
681 pos = skb_put(skb, rates_len - count + 2);
682 *pos++ = WLAN_EID_EXT_SUPP_RATES;
683 *pos++ = rates_len - count;
684
685 for (i++; i < sband->n_bitrates; i++) {
686 if (BIT(i) & rates) {
2103dec1
SW		 687 int rate;
688 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
689 5 * (1 << shift));
690 *pos++ = (u8) rate;
66e67e41
JB		 691 }
692 }
693 }
694
695 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
696 /* 1. power capabilities */
697 pos = skb_put(skb, 4);
698 *pos++ = WLAN_EID_PWR_CAPABILITY;
699 *pos++ = 2;
700 *pos++ = 0; /* min tx power */
0430c883
SW		 701 /* max tx power */
702 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
66e67e41
JB		 703
704 /* 2. supported channels */
705 /* TODO: get this in reg domain format */
706 pos = skb_put(skb, 2 * sband->n_channels + 2);
707 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
708 *pos++ = 2 * sband->n_channels;
709 for (i = 0; i < sband->n_channels; i++) {
710 *pos++ = ieee80211_frequency_to_channel(
711 sband->channels[i].center_freq);
712 *pos++ = 1; /* one channel in the subband*/
713 }
714 }
715
716 /* if present, add any custom IEs that go before HT */
717 if (assoc_data->ie_len && assoc_data->ie) {
718 static const u8 before_ht[] = {
719 WLAN_EID_SSID,
720 WLAN_EID_SUPP_RATES,
721 WLAN_EID_EXT_SUPP_RATES,
722 WLAN_EID_PWR_CAPABILITY,
723 WLAN_EID_SUPPORTED_CHANNELS,
724 WLAN_EID_RSN,
725 WLAN_EID_QOS_CAPA,
726 WLAN_EID_RRM_ENABLED_CAPABILITIES,
727 WLAN_EID_MOBILITY_DOMAIN,
728 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
729 };
730 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
731 before_ht, ARRAY_SIZE(before_ht),
732 offset);
733 pos = skb_put(skb, noffset - offset);
734 memcpy(pos, assoc_data->ie + offset, noffset - offset);
735 offset = noffset;
736 }
737
f2d9d270
JB		 738 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
739 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
740 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
741
a8243b72 742 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
9dde6423 743 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
04ecd257 744 sband, chan, sdata->smps_mode);
66e67e41 745
d545daba 746 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
b08fbbd8
JB		 747 ieee80211_add_vht_ie(sdata, skb, sband,
748 &assoc_data->ap_vht_cap);
d545daba 749
66e67e41
JB		 750 /* if present, add any custom non-vendor IEs that go after HT */
751 if (assoc_data->ie_len && assoc_data->ie) {
752 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
753 assoc_data->ie_len,
754 offset);
755 pos = skb_put(skb, noffset - offset);
756 memcpy(pos, assoc_data->ie + offset, noffset - offset);
757 offset = noffset;
758 }
759
76f0303d
JB		 760 if (assoc_data->wmm) {
761 if (assoc_data->uapsd) {
dc41e4d4
EP		 762 qos_info = ifmgd->uapsd_queues;
763 qos_info |= (ifmgd->uapsd_max_sp_len <<
66e67e41
JB		 764 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
765 } else {
766 qos_info = 0;
767 }
768
769 pos = skb_put(skb, 9);
770 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
771 *pos++ = 7; /* len */
772 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
773 *pos++ = 0x50;
774 *pos++ = 0xf2;
775 *pos++ = 2; /* WME */
776 *pos++ = 0; /* WME info */
777 *pos++ = 1; /* WME ver */
778 *pos++ = qos_info;
779 }
780
781 /* add any remaining custom (i.e. vendor specific here) IEs */
782 if (assoc_data->ie_len && assoc_data->ie) {
783 noffset = assoc_data->ie_len;
784 pos = skb_put(skb, noffset - offset);
785 memcpy(pos, assoc_data->ie + offset, noffset - offset);
786 }
787
a1845fc7
JB		 788 drv_mgd_prepare_tx(local, sdata);
789
66e67e41 790 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1672c0e3
JB		 791 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
792 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
793 IEEE80211_TX_INTFL_MLME_CONN_TX;
66e67e41
JB		 794 ieee80211_tx_skb(sdata, skb);
795}
796
572e0012
KV		 797void ieee80211_send_pspoll(struct ieee80211_local *local,
798 struct ieee80211_sub_if_data *sdata)
799{
572e0012
KV		 800 struct ieee80211_pspoll *pspoll;
801 struct sk_buff *skb;
572e0012 802
d8cd189e
KV		 803 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
804 if (!skb)
572e0012 805 return;
572e0012 806
d8cd189e
KV		 807 pspoll = (struct ieee80211_pspoll *) skb->data;
808 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
572e0012 809
62ae67be
JB		 810 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
811 ieee80211_tx_skb(sdata, skb);
572e0012
KV		 812}
813
965bedad
JB		 814void ieee80211_send_nullfunc(struct ieee80211_local *local,
815 struct ieee80211_sub_if_data *sdata,
816 int powersave)
817{
818 struct sk_buff *skb;
d8cd189e 819 struct ieee80211_hdr_3addr *nullfunc;
b6f35301 820 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
965bedad 821
d8cd189e
KV		 822 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
823 if (!skb)
965bedad 824 return;
965bedad 825
d8cd189e 826 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
965bedad 827 if (powersave)
d8cd189e 828 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
965bedad 829
6c17b77b
SF		 830 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
831 IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
ff40b425
PF		 832
833 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
834 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
835
392b9ffb 836 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
b6f35301
RM		 837 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
838
62ae67be 839 ieee80211_tx_skb(sdata, skb);
965bedad
JB		 840}
841
d524215f
FF		 842static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
843 struct ieee80211_sub_if_data *sdata)
844{
845 struct sk_buff *skb;
846 struct ieee80211_hdr *nullfunc;
847 __le16 fc;
848
849 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
850 return;
851
852 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
d15b8459 853 if (!skb)
d524215f 854 return;
d15b8459 855
d524215f
FF		 856 skb_reserve(skb, local->hw.extra_tx_headroom);
857
858 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
859 memset(nullfunc, 0, 30);
860 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
861 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
862 nullfunc->frame_control = fc;
863 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
864 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
865 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
866 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
867
868 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
869 ieee80211_tx_skb(sdata, skb);
870}
871
cc32abd4
JB		 872/* spectrum management related things */
873static void ieee80211_chswitch_work(struct work_struct *work)
874{
875 struct ieee80211_sub_if_data *sdata =
876 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
675a0b04 877 struct ieee80211_local *local = sdata->local;
cc32abd4 878 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
7578d575
AN		 879 u32 changed = 0;
880 int ret;
cc32abd4 881
9607e6b6 882 if (!ieee80211_sdata_running(sdata))
cc32abd4
JB		 883 return;
884
8d61ffa5 885 sdata_lock(sdata);
77fdaa12
JB		 886 if (!ifmgd->associated)
887 goto out;
cc32abd4 888
7578d575
AN		 889 ret = ieee80211_vif_change_channel(sdata, &local->csa_chandef,
890 &changed);
891 if (ret) {
892 sdata_info(sdata,
893 "vif channel switch failed, disconnecting\n");
894 ieee80211_queue_work(&sdata->local->hw,
895 &ifmgd->csa_connection_drop_work);
896 goto out;
897 }
675a0b04 898
7578d575
AN		 899 if (!local->use_chanctx) {
900 local->_oper_chandef = local->csa_chandef;
901 /* Call "hw_config" only if doing sw channel switch.
902 * Otherwise update the channel directly
903 */
904 if (!local->ops->channel_switch)
905 ieee80211_hw_config(local, 0);
906 else
907 local->hw.conf.chandef = local->_oper_chandef;
5ce6e438 908 }
77fdaa12 909
cc32abd4 910 /* XXX: shouldn't really modify cfg80211-owned data! */
7578d575 911 ifmgd->associated->channel = local->csa_chandef.chan;
cc32abd4 912
57eebdf3 913 /* XXX: wait for a beacon first? */
675a0b04 914 ieee80211_wake_queues_by_reason(&local->hw,
445ea4e8 915 IEEE80211_MAX_QUEUE_MAP,
cc32abd4 916 IEEE80211_QUEUE_STOP_REASON_CSA);
7578d575
AN		 917
918 ieee80211_bss_info_change_notify(sdata, changed);
919
77fdaa12 920 out:
7578d575 921 sdata->vif.csa_active = false;
77fdaa12 922 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
8d61ffa5 923 sdata_unlock(sdata);
cc32abd4
JB		 924}
925
5ce6e438
JB		 926void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
927{
55de908a
JB		 928 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
929 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5ce6e438
JB		 930
931 trace_api_chswitch_done(sdata, success);
932 if (!success) {
882a7c69
JB		 933 sdata_info(sdata,
934 "driver channel switch failed, disconnecting\n");
935 ieee80211_queue_work(&sdata->local->hw,
936 &ifmgd->csa_connection_drop_work);
937 } else {
938 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
5ce6e438 939 }
5ce6e438
JB		 940}
941EXPORT_SYMBOL(ieee80211_chswitch_done);
942
cc32abd4
JB		 943static void ieee80211_chswitch_timer(unsigned long data)
944{
945 struct ieee80211_sub_if_data *sdata =
946 (struct ieee80211_sub_if_data *) data;
5bb644a0 947
9b7d72c1 948 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
cc32abd4
JB		 949}
950
37799e52 951static void
4a3cb702 952ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
04a161f4
JB		 953 u64 timestamp, struct ieee802_11_elems *elems,
954 bool beacon)
cc32abd4 955{
b4f286a1 956 struct ieee80211_local *local = sdata->local;
cc32abd4 957 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
37799e52 958 struct cfg80211_bss *cbss = ifmgd->associated;
55de908a 959 struct ieee80211_chanctx *chanctx;
e6b7cde4 960 enum ieee80211_band current_band;
b4f286a1
JB		 961 u8 count;
962 u8 mode;
85220d71 963 struct cfg80211_chan_def new_chandef = {};
e6b7cde4 964 int res;
cc32abd4 965
8d61ffa5 966 sdata_assert_lock(sdata);
77fdaa12 967
37799e52 968 if (!cbss)
cc32abd4
JB		 969 return;
970
b4f286a1 971 if (local->scanning)
cc32abd4
JB		 972 return;
973
37799e52 974 /* disregard subsequent announcements if we are already processing */
cc32abd4
JB		 975 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
976 return;
977
e6b7cde4
SW		 978 current_band = cbss->channel->band;
979 res = ieee80211_parse_ch_switch_ie(sdata, elems, beacon, current_band,
980 ifmgd->flags,
981 ifmgd->associated->bssid, &count,
982 &mode, &new_chandef);
983 if (res < 0)
b4f286a1 984 ieee80211_queue_work(&local->hw,
882a7c69 985 &ifmgd->csa_connection_drop_work);
e6b7cde4 986 if (res)
cc32abd4 987 return;
cd64f2a9 988
85220d71
JB		 989 if (!cfg80211_chandef_usable(local->hw.wiphy, &new_chandef,
990 IEEE80211_CHAN_DISABLED)) {
991 sdata_info(sdata,
992 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
e6b7cde4
SW		 993 ifmgd->associated->bssid,
994 new_chandef.chan->center_freq,
85220d71
JB		 995 new_chandef.width, new_chandef.center_freq1,
996 new_chandef.center_freq2);
997 ieee80211_queue_work(&local->hw,
998 &ifmgd->csa_connection_drop_work);
999 return;
1000 }
1001
57eebdf3 1002 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
7578d575 1003 sdata->vif.csa_active = true;
57eebdf3 1004
7578d575 1005 mutex_lock(&local->chanctx_mtx);
b4f286a1 1006 if (local->use_chanctx) {
7578d575
AN		 1007 u32 num_chanctx = 0;
1008 list_for_each_entry(chanctx, &local->chanctx_list, list)
1009 num_chanctx++;
1010
1011 if (num_chanctx > 1 ||
1012 !(local->hw.flags & IEEE80211_HW_CHANCTX_STA_CSA)) {
1013 sdata_info(sdata,
1014 "not handling chan-switch with channel contexts\n");
1015 ieee80211_queue_work(&local->hw,
1016 &ifmgd->csa_connection_drop_work);
1017 mutex_unlock(&local->chanctx_mtx);
1018 return;
1019 }
55de908a
JB		 1020 }
1021
55de908a 1022 if (WARN_ON(!rcu_access_pointer(sdata->vif.chanctx_conf))) {
7578d575
AN		 1023 ieee80211_queue_work(&local->hw,
1024 &ifmgd->csa_connection_drop_work);
b4f286a1 1025 mutex_unlock(&local->chanctx_mtx);
55de908a
JB		 1026 return;
1027 }
1028 chanctx = container_of(rcu_access_pointer(sdata->vif.chanctx_conf),
1029 struct ieee80211_chanctx, conf);
1030 if (chanctx->refcount > 1) {
1031 sdata_info(sdata,
1032 "channel switch with multiple interfaces on the same channel, disconnecting\n");
b4f286a1 1033 ieee80211_queue_work(&local->hw,
55de908a 1034 &ifmgd->csa_connection_drop_work);
b4f286a1 1035 mutex_unlock(&local->chanctx_mtx);
55de908a
JB		 1036 return;
1037 }
b4f286a1 1038 mutex_unlock(&local->chanctx_mtx);
55de908a 1039
85220d71 1040 local->csa_chandef = new_chandef;
55de908a 1041
b4f286a1
JB		 1042 if (mode)
1043 ieee80211_stop_queues_by_reason(&local->hw,
445ea4e8 1044 IEEE80211_MAX_QUEUE_MAP,
57eebdf3
JB		 1045 IEEE80211_QUEUE_STOP_REASON_CSA);
1046
b4f286a1 1047 if (local->ops->channel_switch) {
5ce6e438 1048 /* use driver's channel switch callback */
57eebdf3
JB		 1049 struct ieee80211_channel_switch ch_switch = {
1050 .timestamp = timestamp,
b4f286a1 1051 .block_tx = mode,
85220d71 1052 .chandef = new_chandef,
b4f286a1 1053 .count = count,
57eebdf3
JB		 1054 };
1055
b4f286a1 1056 drv_channel_switch(local, &ch_switch);
5ce6e438
JB		 1057 return;
1058 }
1059
1060 /* channel switch handled in software */
b4f286a1
JB		 1061 if (count <= 1)
1062 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
57eebdf3 1063 else
cc32abd4 1064 mod_timer(&ifmgd->chswitch_timer,
b4f286a1 1065 TU_TO_EXP_TIME(count * cbss->beacon_interval));
cc32abd4
JB		 1066}
1067
1ea6f9c0
JB		 1068static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1069 struct ieee80211_channel *channel,
1070 const u8 *country_ie, u8 country_ie_len,
1071 const u8 *pwr_constr_elem)
cc32abd4 1072{
04b7b2ff
JB		 1073 struct ieee80211_country_ie_triplet *triplet;
1074 int chan = ieee80211_frequency_to_channel(channel->center_freq);
1075 int i, chan_pwr, chan_increment, new_ap_level;
1076 bool have_chan_pwr = false;
cc32abd4 1077
04b7b2ff
JB		 1078 /* Invalid IE */
1079 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1ea6f9c0 1080 return 0;
cc32abd4 1081
04b7b2ff
JB		 1082 triplet = (void *)(country_ie + 3);
1083 country_ie_len -= 3;
1084
1085 switch (channel->band) {
1086 default:
1087 WARN_ON_ONCE(1);
1088 /* fall through */
1089 case IEEE80211_BAND_2GHZ:
1090 case IEEE80211_BAND_60GHZ:
1091 chan_increment = 1;
1092 break;
1093 case IEEE80211_BAND_5GHZ:
1094 chan_increment = 4;
1095 break;
cc32abd4 1096 }
04b7b2ff
JB		 1097
1098 /* find channel */
1099 while (country_ie_len >= 3) {
1100 u8 first_channel = triplet->chans.first_channel;
1101
1102 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1103 goto next;
1104
1105 for (i = 0; i < triplet->chans.num_channels; i++) {
1106 if (first_channel + i * chan_increment == chan) {
1107 have_chan_pwr = true;
1108 chan_pwr = triplet->chans.max_power;
1109 break;
1110 }
1111 }
1112 if (have_chan_pwr)
1113 break;
1114
1115 next:
1116 triplet++;
1117 country_ie_len -= 3;
1118 }
1119
1120 if (!have_chan_pwr)
1ea6f9c0 1121 return 0;
04b7b2ff
JB		 1122
1123 new_ap_level = max_t(int, 0, chan_pwr - *pwr_constr_elem);
1124
1ea6f9c0
JB		 1125 if (sdata->ap_power_level == new_ap_level)
1126 return 0;
04b7b2ff
JB		 1127
1128 sdata_info(sdata,
1129 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1130 new_ap_level, chan_pwr, *pwr_constr_elem,
1131 sdata->u.mgd.bssid);
1ea6f9c0
JB		 1132 sdata->ap_power_level = new_ap_level;
1133 if (__ieee80211_recalc_txpower(sdata))
1134 return BSS_CHANGED_TXPOWER;
1135 return 0;
cc32abd4
JB		 1136}
1137
965bedad
JB		 1138/* powersave */
1139static void ieee80211_enable_ps(struct ieee80211_local *local,
1140 struct ieee80211_sub_if_data *sdata)
1141{
1142 struct ieee80211_conf *conf = &local->hw.conf;
1143
d5edaedc
JB		 1144 /*
1145 * If we are scanning right now then the parameters will
1146 * take effect when scan finishes.
1147 */
fbe9c429 1148 if (local->scanning)
d5edaedc
JB		 1149 return;
1150
965bedad
JB		 1151 if (conf->dynamic_ps_timeout > 0 &&
1152 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
1153 mod_timer(&local->dynamic_ps_timer, jiffies +
1154 msecs_to_jiffies(conf->dynamic_ps_timeout));
1155 } else {
1156 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1157 ieee80211_send_nullfunc(local, sdata, 1);
375177bf 1158
2a13052f
JO		 1159 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1160 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
1161 return;
1162
1163 conf->flags |= IEEE80211_CONF_PS;
1164 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965bedad
JB		 1165 }
1166}
1167
1168static void ieee80211_change_ps(struct ieee80211_local *local)
1169{
1170 struct ieee80211_conf *conf = &local->hw.conf;
1171
1172 if (local->ps_sdata) {
965bedad
JB		 1173 ieee80211_enable_ps(local, local->ps_sdata);
1174 } else if (conf->flags & IEEE80211_CONF_PS) {
1175 conf->flags &= ~IEEE80211_CONF_PS;
1176 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1177 del_timer_sync(&local->dynamic_ps_timer);
1178 cancel_work_sync(&local->dynamic_ps_enable_work);
1179 }
1180}
1181
808118cb
JY		 1182static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1183{
1184 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1185 struct sta_info *sta = NULL;
c2c98fde 1186 bool authorized = false;
808118cb
JY		 1187
1188 if (!mgd->powersave)
1189 return false;
1190
05cb9108
JB		 1191 if (mgd->broken_ap)
1192 return false;
1193
808118cb
JY		 1194 if (!mgd->associated)
1195 return false;
1196
392b9ffb 1197 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
808118cb
JY		 1198 return false;
1199
989c6505 1200 if (!mgd->have_beacon)
ce857888
AB		 1201 return false;
1202
808118cb
JY		 1203 rcu_read_lock();
1204 sta = sta_info_get(sdata, mgd->bssid);
1205 if (sta)
c2c98fde 1206 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
808118cb
JY		 1207 rcu_read_unlock();
1208
c2c98fde 1209 return authorized;
808118cb
JY		 1210}
1211
965bedad 1212/* need to hold RTNL or interface lock */
10f644a4 1213void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 1214{
1215 struct ieee80211_sub_if_data *sdata, *found = NULL;
1216 int count = 0;
195e294d 1217 int timeout;
965bedad
JB		 1218
1219 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
1220 local->ps_sdata = NULL;
1221 return;
1222 }
1223
1224 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 1225 if (!ieee80211_sdata_running(sdata))
965bedad 1226 continue;
8c7914de
RM		 1227 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1228 /* If an AP vif is found, then disable PS
1229 * by setting the count to zero thereby setting
1230 * ps_sdata to NULL.
1231 */
1232 count = 0;
1233 break;
1234 }
965bedad
JB		 1235 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1236 continue;
1237 found = sdata;
1238 count++;
1239 }
1240
808118cb 1241 if (count == 1 && ieee80211_powersave_allowed(found)) {
10f644a4
JB		 1242 s32 beaconint_us;
1243
1244 if (latency < 0)
ed77134b 1245 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
10f644a4
JB		 1246
1247 beaconint_us = ieee80211_tu_to_usec(
1248 found->vif.bss_conf.beacon_int);
1249
ff616381 1250 timeout = local->dynamic_ps_forced_timeout;
195e294d
JO		 1251 if (timeout < 0) {
1252 /*
ff616381
JO		 1253 * Go to full PSM if the user configures a very low
1254 * latency requirement.
0ab82b04
EP		 1255 * The 2000 second value is there for compatibility
1256 * until the PM_QOS_NETWORK_LATENCY is configured
1257 * with real values.
195e294d 1258 */
0ab82b04
EP		 1259 if (latency > (1900 * USEC_PER_MSEC) &&
1260 latency != (2000 * USEC_PER_SEC))
195e294d 1261 timeout = 0;
ff616381
JO		 1262 else
1263 timeout = 100;
195e294d 1264 }
09b85568 1265 local->hw.conf.dynamic_ps_timeout = timeout;
195e294d 1266
04fe2037 1267 if (beaconint_us > latency) {
10f644a4 1268 local->ps_sdata = NULL;
04fe2037 1269 } else {
04fe2037 1270 int maxslp = 1;
826262c3 1271 u8 dtimper = found->u.mgd.dtim_period;
56007a02
JB		 1272
1273 /* If the TIM IE is invalid, pretend the value is 1 */
1274 if (!dtimper)
1275 dtimper = 1;
1276 else if (dtimper > 1)
04fe2037
JB		 1277 maxslp = min_t(int, dtimper,
1278 latency / beaconint_us);
1279
9ccebe61 1280 local->hw.conf.max_sleep_period = maxslp;
56007a02 1281 local->hw.conf.ps_dtim_period = dtimper;
10f644a4 1282 local->ps_sdata = found;
04fe2037 1283 }
10f644a4 1284 } else {
965bedad 1285 local->ps_sdata = NULL;
10f644a4 1286 }
965bedad
JB		 1287
1288 ieee80211_change_ps(local);
1289}
1290
ab095877
EP		 1291void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1292{
1293 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1294
1295 if (sdata->vif.bss_conf.ps != ps_allowed) {
1296 sdata->vif.bss_conf.ps = ps_allowed;
1297 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1298 }
1299}
1300
965bedad
JB		 1301void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1302{
1303 struct ieee80211_local *local =
1304 container_of(work, struct ieee80211_local,
1305 dynamic_ps_disable_work);
1306
1307 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1308 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1309 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1310 }
1311
1312 ieee80211_wake_queues_by_reason(&local->hw,
445ea4e8 1313 IEEE80211_MAX_QUEUE_MAP,
965bedad
JB		 1314 IEEE80211_QUEUE_STOP_REASON_PS);
1315}
1316
1317void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1318{
1319 struct ieee80211_local *local =
1320 container_of(work, struct ieee80211_local,
1321 dynamic_ps_enable_work);
1322 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
5e34069c 1323 struct ieee80211_if_managed *ifmgd;
1ddc2867
RM		 1324 unsigned long flags;
1325 int q;
965bedad
JB		 1326
1327 /* can only happen when PS was just disabled anyway */
1328 if (!sdata)
1329 return;
1330
5e34069c
CL		 1331 ifmgd = &sdata->u.mgd;
1332
965bedad
JB		 1333 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1334 return;
1335
09b85568 1336 if (local->hw.conf.dynamic_ps_timeout > 0) {
77b7023a
AN		 1337 /* don't enter PS if TX frames are pending */
1338 if (drv_tx_frames_pending(local)) {
1ddc2867
RM		 1339 mod_timer(&local->dynamic_ps_timer, jiffies +
1340 msecs_to_jiffies(
1341 local->hw.conf.dynamic_ps_timeout));
1342 return;
1343 }
77b7023a
AN		 1344
1345 /*
1346 * transmission can be stopped by others which leads to
1347 * dynamic_ps_timer expiry. Postpone the ps timer if it
1348 * is not the actual idle state.
1349 */
1350 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1351 for (q = 0; q < local->hw.queues; q++) {
1352 if (local->queue_stop_reasons[q]) {
1353 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1354 flags);
1355 mod_timer(&local->dynamic_ps_timer, jiffies +
1356 msecs_to_jiffies(
1357 local->hw.conf.dynamic_ps_timeout));
1358 return;
1359 }
1360 }
1361 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1ddc2867 1362 }
1ddc2867 1363
375177bf 1364 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
9c38a8b4 1365 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
a1598383 1366 if (drv_tx_frames_pending(local)) {
e8306f98
VN		 1367 mod_timer(&local->dynamic_ps_timer, jiffies +
1368 msecs_to_jiffies(
1369 local->hw.conf.dynamic_ps_timeout));
a1598383 1370 } else {
e8306f98
VN		 1371 ieee80211_send_nullfunc(local, sdata, 1);
1372 /* Flush to get the tx status of nullfunc frame */
39ecc01d 1373 ieee80211_flush_queues(local, sdata);
e8306f98 1374 }
f3e85b9e
VN		 1375 }
1376
2a13052f
JO		 1377 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1378 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
375177bf
VN		 1379 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1380 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1381 local->hw.conf.flags |= IEEE80211_CONF_PS;
1382 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1383 }
965bedad
JB		 1384}
1385
1386void ieee80211_dynamic_ps_timer(unsigned long data)
1387{
1388 struct ieee80211_local *local = (void *) data;
1389
78f1a8b7 1390 if (local->quiescing || local->suspended)
5bb644a0
JB		 1391 return;
1392
42935eca 1393 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 1394}
1395
164eb02d
SW		 1396void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1397{
1398 struct delayed_work *delayed_work =
1399 container_of(work, struct delayed_work, work);
1400 struct ieee80211_sub_if_data *sdata =
1401 container_of(delayed_work, struct ieee80211_sub_if_data,
1402 dfs_cac_timer_work);
1403
1404 ieee80211_vif_release_channel(sdata);
1405
1406 cfg80211_cac_event(sdata->dev, NL80211_RADAR_CAC_FINISHED, GFP_KERNEL);
1407}
1408
60f8b39c 1409/* MLME */
7d25745d 1410static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
4ced3f74 1411 struct ieee80211_sub_if_data *sdata,
4a3cb702 1412 const u8 *wmm_param, size_t wmm_param_len)
f0706e82 1413{
f0706e82 1414 struct ieee80211_tx_queue_params params;
4ced3f74 1415 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1416 size_t left;
1417 int count;
4a3cb702
JB		 1418 const u8 *pos;
1419 u8 uapsd_queues = 0;
f0706e82 1420
e1b3ec1a 1421 if (!local->ops->conf_tx)
7d25745d 1422 return false;
e1b3ec1a 1423
32c5057b 1424 if (local->hw.queues < IEEE80211_NUM_ACS)
7d25745d 1425 return false;
3434fbd3
JB		 1426
1427 if (!wmm_param)
7d25745d 1428 return false;
3434fbd3 1429
f0706e82 1430 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
7d25745d 1431 return false;
ab13315a
KV		 1432
1433 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
dc41e4d4 1434 uapsd_queues = ifmgd->uapsd_queues;
ab13315a 1435
f0706e82 1436 count = wmm_param[6] & 0x0f;
46900298 1437 if (count == ifmgd->wmm_last_param_set)
7d25745d 1438 return false;
46900298 1439 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 1440
1441 pos = wmm_param + 8;
1442 left = wmm_param_len - 8;
1443
1444 memset(&params, 0, sizeof(params));
1445
00e96dec 1446 sdata->wmm_acm = 0;
f0706e82
JB		 1447 for (; left >= 4; left -= 4, pos += 4) {
1448 int aci = (pos[0] >> 5) & 0x03;
1449 int acm = (pos[0] >> 4) & 0x01;
ab13315a 1450 bool uapsd = false;
f0706e82
JB		 1451 int queue;
1452
1453 switch (aci) {
0eeb59fe 1454 case 1: /* AC_BK */
e100bb64 1455 queue = 3;
988c0f72 1456 if (acm)
00e96dec 1457 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV		 1458 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1459 uapsd = true;
f0706e82 1460 break;
0eeb59fe 1461 case 2: /* AC_VI */
e100bb64 1462 queue = 1;
988c0f72 1463 if (acm)
00e96dec 1464 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV		 1465 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1466 uapsd = true;
f0706e82 1467 break;
0eeb59fe 1468 case 3: /* AC_VO */
e100bb64 1469 queue = 0;
988c0f72 1470 if (acm)
00e96dec 1471 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV		 1472 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1473 uapsd = true;
f0706e82 1474 break;
0eeb59fe 1475 case 0: /* AC_BE */
f0706e82 1476 default:
e100bb64 1477 queue = 2;
988c0f72 1478 if (acm)
00e96dec 1479 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV		 1480 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1481 uapsd = true;
f0706e82
JB		 1482 break;
1483 }
1484
1485 params.aifs = pos[0] & 0x0f;
1486 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1487 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 1488 params.txop = get_unaligned_le16(pos + 2);
908f8d07 1489 params.acm = acm;
ab13315a
KV		 1490 params.uapsd = uapsd;
1491
bdcbd8e0
JB		 1492 mlme_dbg(sdata,
1493 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1494 queue, aci, acm,
1495 params.aifs, params.cw_min, params.cw_max,
1496 params.txop, params.uapsd);
f6f3def3
EP		 1497 sdata->tx_conf[queue] = params;
1498 if (drv_conf_tx(local, sdata, queue, &params))
bdcbd8e0
JB		 1499 sdata_err(sdata,
1500 "failed to set TX queue parameters for queue %d\n",
1501 queue);
f0706e82 1502 }
e1b3ec1a
SG		 1503
1504 /* enable WMM or activate new settings */
4ced3f74 1505 sdata->vif.bss_conf.qos = true;
7d25745d 1506 return true;
f0706e82
JB		 1507}
1508
925e64c3
SG		 1509static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1510{
1511 lockdep_assert_held(&sdata->local->mtx);
1512
392b9ffb 1513 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
925e64c3
SG		 1514 ieee80211_run_deferred_scan(sdata->local);
1515}
1516
1517static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1518{
1519 mutex_lock(&sdata->local->mtx);
1520 __ieee80211_stop_poll(sdata);
1521 mutex_unlock(&sdata->local->mtx);
1522}
1523
7a5158ef
JB		 1524static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1525 u16 capab, bool erp_valid, u8 erp)
5628221c 1526{
bda3933a 1527 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 1528 u32 changed = 0;
7a5158ef
JB		 1529 bool use_protection;
1530 bool use_short_preamble;
1531 bool use_short_slot;
1532
1533 if (erp_valid) {
1534 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1535 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1536 } else {
1537 use_protection = false;
1538 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1539 }
1540
1541 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
55de908a 1542 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
43d35343 1543 use_short_slot = true;
5628221c 1544
471b3efd 1545 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 1546 bss_conf->use_cts_prot = use_protection;
1547 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 1548 }
7e9ed188 1549
d43c7b37 1550 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 1551 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 1552 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 1553 }
d9430a32 1554
7a5158ef 1555 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 1556 bss_conf->use_short_slot = use_short_slot;
1557 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 1558 }
1559
1560 return changed;
1561}
1562
f698d856 1563static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 1564 struct cfg80211_bss *cbss,
ae5eb026 1565 u32 bss_info_changed)
f0706e82 1566{
0c1ad2ca 1567 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 1568 struct ieee80211_local *local = sdata->local;
68542962 1569 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
d6f2da5b 1570
ae5eb026 1571 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 1572 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
50ae34a2 1573 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 1574
7ccc8bd7 1575 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
59c1ec2b 1576 beacon_loss_count * bss_conf->beacon_int));
7ccc8bd7 1577
0c1ad2ca
JB		 1578 sdata->u.mgd.associated = cbss;
1579 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 1580
17e4ec14
JM		 1581 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1582
488dd7b5 1583 if (sdata->vif.p2p) {
9caf0364 1584 const struct cfg80211_bss_ies *ies;
488dd7b5 1585
9caf0364
JB		 1586 rcu_read_lock();
1587 ies = rcu_dereference(cbss->ies);
1588 if (ies) {
9caf0364
JB		 1589 int ret;
1590
1591 ret = cfg80211_get_p2p_attr(
1592 ies->data, ies->len,
1593 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
67baf663
JD		 1594 (u8 *) &bss_conf->p2p_noa_attr,
1595 sizeof(bss_conf->p2p_noa_attr));
9caf0364 1596 if (ret >= 2) {
67baf663
JD		 1597 sdata->u.mgd.p2p_noa_index =
1598 bss_conf->p2p_noa_attr.index;
9caf0364 1599 bss_info_changed |= BSS_CHANGED_P2P_PS;
9caf0364 1600 }
488dd7b5 1601 }
9caf0364 1602 rcu_read_unlock();
488dd7b5
JB		 1603 }
1604
b291ba11 1605 /* just to be sure */
925e64c3 1606 ieee80211_stop_poll(sdata);
b291ba11 1607
9ac19a90 1608 ieee80211_led_assoc(local, 1);
9306102e 1609
989c6505 1610 if (sdata->u.mgd.have_beacon) {
826262c3
JB		 1611 /*
1612 * If the AP is buggy we may get here with no DTIM period
1613 * known, so assume it's 1 which is the only safe assumption
1614 * in that case, although if the TIM IE is broken powersave
1615 * probably just won't work at all.
1616 */
1617 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
817cee76 1618 bss_conf->beacon_rate = bss->beacon_rate;
989c6505 1619 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
826262c3 1620 } else {
817cee76 1621 bss_conf->beacon_rate = NULL;
e5b900d2 1622 bss_conf->dtim_period = 0;
826262c3 1623 }
e5b900d2 1624
68542962 1625 bss_conf->assoc = 1;
9cef8737 1626
a97c13c3 1627 /* Tell the driver to monitor connection quality (if supported) */
ea086359 1628 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
68542962 1629 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 1630 bss_info_changed |= BSS_CHANGED_CQM;
1631
68542962 1632 /* Enable ARP filtering */
0f19b41e 1633 if (bss_conf->arp_addr_cnt)
68542962 1634 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
68542962 1635
ae5eb026 1636 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 1637
056508dc
JB		 1638 mutex_lock(&local->iflist_mtx);
1639 ieee80211_recalc_ps(local, -1);
1640 mutex_unlock(&local->iflist_mtx);
e0cb686f 1641
04ecd257 1642 ieee80211_recalc_smps(sdata);
ab095877
EP		 1643 ieee80211_recalc_ps_vif(sdata);
1644
9ac19a90 1645 netif_carrier_on(sdata->dev);
f0706e82
JB		 1646}
1647
e69e95db 1648static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
37ad3888
JB		 1649 u16 stype, u16 reason, bool tx,
1650 u8 *frame_buf)
aa458d17 1651{
46900298 1652 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17 1653 struct ieee80211_local *local = sdata->local;
3cc5240b 1654 u32 changed = 0;
aa458d17 1655
8d61ffa5 1656 sdata_assert_lock(sdata);
77fdaa12 1657
37ad3888
JB		 1658 if (WARN_ON_ONCE(tx && !frame_buf))
1659 return;
1660
b291ba11
JB		 1661 if (WARN_ON(!ifmgd->associated))
1662 return;
1663
79543d8e
DS		 1664 ieee80211_stop_poll(sdata);
1665
77fdaa12 1666 ifmgd->associated = NULL;
aa458d17
TW		 1667 netif_carrier_off(sdata->dev);
1668
88bc40e8
EP		 1669 /*
1670 * if we want to get out of ps before disassoc (why?) we have
1671 * to do it before sending disassoc, as otherwise the null-packet
1672 * won't be valid.
1673 */
1674 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1675 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1676 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1677 }
1678 local->ps_sdata = NULL;
1679
ab095877
EP		 1680 /* disable per-vif ps */
1681 ieee80211_recalc_ps_vif(sdata);
1682
f823981e
EP		 1683 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1684 if (tx)
39ecc01d 1685 ieee80211_flush_queues(local, sdata);
f823981e 1686
37ad3888
JB		 1687 /* deauthenticate/disassociate now */
1688 if (tx || frame_buf)
88a9e31c
EP		 1689 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
1690 reason, tx, frame_buf);
37ad3888
JB		 1691
1692 /* flush out frame */
1693 if (tx)
39ecc01d 1694 ieee80211_flush_queues(local, sdata);
37ad3888 1695
88a9e31c
EP		 1696 /* clear bssid only after building the needed mgmt frames */
1697 memset(ifmgd->bssid, 0, ETH_ALEN);
1698
37ad3888 1699 /* remove AP and TDLS peers */
051007d9 1700 sta_info_flush_defer(sdata);
37ad3888
JB		 1701
1702 /* finally reset all BSS / config parameters */
f5e5bf25
TW		 1703 changed |= ieee80211_reset_erp_info(sdata);
1704
f5e5bf25 1705 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 1706 changed |= BSS_CHANGED_ASSOC;
1707 sdata->vif.bss_conf.assoc = false;
f5e5bf25 1708
67baf663
JD		 1709 ifmgd->p2p_noa_index = -1;
1710 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
1711 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
488dd7b5 1712
dd5ecfea 1713 /* on the next assoc, re-program HT/VHT parameters */
ef96a842
BG		 1714 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1715 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
dd5ecfea
JB		 1716 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
1717 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
413ad50a 1718
1ea6f9c0 1719 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
a8302de9 1720
520eb820
KV		 1721 del_timer_sync(&local->dynamic_ps_timer);
1722 cancel_work_sync(&local->dynamic_ps_enable_work);
1723
68542962 1724 /* Disable ARP filtering */
0f19b41e 1725 if (sdata->vif.bss_conf.arp_addr_cnt)
68542962 1726 changed |= BSS_CHANGED_ARP_FILTER;
68542962 1727
3abead59
JB		 1728 sdata->vif.bss_conf.qos = false;
1729 changed |= BSS_CHANGED_QOS;
1730
0aaffa9b
JB		 1731 /* The BSSID (not really interesting) and HT changed */
1732 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 1733 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 1734
3abead59
JB		 1735 /* disassociated - set to defaults now */
1736 ieee80211_set_wmm_default(sdata, false);
1737
b9dcf712
JB		 1738 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1739 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1740 del_timer_sync(&sdata->u.mgd.timer);
1741 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2d9957cc 1742
826262c3 1743 sdata->vif.bss_conf.dtim_period = 0;
817cee76
AB		 1744 sdata->vif.bss_conf.beacon_rate = NULL;
1745
989c6505 1746 ifmgd->have_beacon = false;
826262c3 1747
028e8da0
JB		 1748 ifmgd->flags = 0;
1749 ieee80211_vif_release_channel(sdata);
aa458d17 1750}
f0706e82 1751
3cf335d5
KV		 1752void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1753 struct ieee80211_hdr *hdr)
1754{
1755 /*
1756 * We can postpone the mgd.timer whenever receiving unicast frames
1757 * from AP because we know that the connection is working both ways
1758 * at that time. But multicast frames (and hence also beacons) must
1759 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 1760 * data idle periods for sending the periodic probe request to the
1761 * AP we're connected to.
3cf335d5 1762 */
b291ba11
JB		 1763 if (is_multicast_ether_addr(hdr->addr1))
1764 return;
1765
be099e82 1766 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 1767}
f0706e82 1768
4e5ff376
FF		 1769static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1770{
1771 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
133d40f9 1772 struct ieee80211_local *local = sdata->local;
4e5ff376 1773
133d40f9 1774 mutex_lock(&local->mtx);
392b9ffb
SG		 1775 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
1776 goto out;
4e5ff376 1777
925e64c3 1778 __ieee80211_stop_poll(sdata);
133d40f9
SG		 1779
1780 mutex_lock(&local->iflist_mtx);
1781 ieee80211_recalc_ps(local, -1);
1782 mutex_unlock(&local->iflist_mtx);
4e5ff376
FF		 1783
1784 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
133d40f9 1785 goto out;
4e5ff376
FF		 1786
1787 /*
1788 * We've received a probe response, but are not sure whether
1789 * we have or will be receiving any beacons or data, so let's
1790 * schedule the timers again, just in case.
1791 */
1792 ieee80211_sta_reset_beacon_monitor(sdata);
1793
1794 mod_timer(&ifmgd->conn_mon_timer,
1795 round_jiffies_up(jiffies +
1796 IEEE80211_CONNECTION_IDLE_TIME));
133d40f9 1797out:
133d40f9 1798 mutex_unlock(&local->mtx);
4e5ff376
FF		 1799}
1800
1801void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
04ac3c0e 1802 struct ieee80211_hdr *hdr, bool ack)
4e5ff376 1803{
75706d0e 1804 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF		 1805 return;
1806
4e5ff376
FF		 1807 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1808 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e 1809 if (ack)
cab1c7fd 1810 ieee80211_sta_reset_conn_monitor(sdata);
04ac3c0e
FF		 1811 else
1812 sdata->u.mgd.nullfunc_failed = true;
4e5ff376 1813 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
cab1c7fd 1814 return;
4e5ff376 1815 }
cab1c7fd
WD		 1816
1817 if (ack)
1818 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF		 1819}
1820
a43abf29
ML		 1821static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1822{
1823 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1824 const u8 *ssid;
f01a067d 1825 u8 *dst = ifmgd->associated->bssid;
180205bd 1826 u8 unicast_limit = max(1, max_probe_tries - 3);
f01a067d
LR		 1827
1828 /*
1829 * Try sending broadcast probe requests for the last three
1830 * probe requests after the first ones failed since some
1831 * buggy APs only support broadcast probe requests.
1832 */
1833 if (ifmgd->probe_send_count >= unicast_limit)
1834 dst = NULL;
a43abf29 1835
4e5ff376
FF		 1836 /*
1837 * When the hardware reports an accurate Tx ACK status, it's
1838 * better to send a nullfunc frame instead of a probe request,
1839 * as it will kick us off the AP quickly if we aren't associated
1840 * anymore. The timeout will be reset if the frame is ACKed by
1841 * the AP.
1842 */
992e68bf
SD		 1843 ifmgd->probe_send_count++;
1844
04ac3c0e
FF		 1845 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1846 ifmgd->nullfunc_failed = false;
4e5ff376 1847 ieee80211_send_nullfunc(sdata->local, sdata, 0);
04ac3c0e 1848 } else {
88c868c4
SG		 1849 int ssid_len;
1850
9caf0364 1851 rcu_read_lock();
4e5ff376 1852 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
88c868c4
SG		 1853 if (WARN_ON_ONCE(ssid == NULL))
1854 ssid_len = 0;
1855 else
1856 ssid_len = ssid[1];
1857
1858 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
1672c0e3 1859 0, (u32) -1, true, 0,
55de908a 1860 ifmgd->associated->channel, false);
9caf0364 1861 rcu_read_unlock();
4e5ff376 1862 }
a43abf29 1863
180205bd 1864 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
8d61ffa5 1865 run_again(sdata, ifmgd->probe_timeout);
f69b9c79 1866 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
39ecc01d 1867 ieee80211_flush_queues(sdata->local, sdata);
a43abf29
ML		 1868}
1869
b291ba11
JB		 1870static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1871 bool beacon)
04de8381 1872{
04de8381 1873 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 1874 bool already = false;
34bfc411 1875
9607e6b6 1876 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 1877 return;
1878
8d61ffa5 1879 sdata_lock(sdata);
77fdaa12
JB		 1880
1881 if (!ifmgd->associated)
1882 goto out;
1883
133d40f9
SG		 1884 mutex_lock(&sdata->local->mtx);
1885
1886 if (sdata->local->tmp_channel || sdata->local->scanning) {
1887 mutex_unlock(&sdata->local->mtx);
1888 goto out;
1889 }
1890
a13fbe54 1891 if (beacon) {
bdcbd8e0 1892 mlme_dbg_ratelimited(sdata,
59c1ec2b
BG		 1893 "detected beacon loss from AP (missed %d beacons) - probing\n",
1894 beacon_loss_count);
bdcbd8e0 1895
a13fbe54
BG		 1896 ieee80211_cqm_rssi_notify(&sdata->vif,
1897 NL80211_CQM_RSSI_BEACON_LOSS_EVENT,
1898 GFP_KERNEL);
1899 }
04de8381 1900
b291ba11
JB		 1901 /*
1902 * The driver/our work has already reported this event or the
1903 * connection monitoring has kicked in and we have already sent
1904 * a probe request. Or maybe the AP died and the driver keeps
1905 * reporting until we disassociate...
1906 *
1907 * In either case we have to ignore the current call to this
1908 * function (except for setting the correct probe reason bit)
1909 * because otherwise we would reset the timer every time and
1910 * never check whether we received a probe response!
1911 */
392b9ffb 1912 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
b291ba11
JB		 1913 already = true;
1914
133d40f9
SG		 1915 mutex_unlock(&sdata->local->mtx);
1916
b291ba11
JB		 1917 if (already)
1918 goto out;
1919
4e751843
JB		 1920 mutex_lock(&sdata->local->iflist_mtx);
1921 ieee80211_recalc_ps(sdata->local, -1);
1922 mutex_unlock(&sdata->local->iflist_mtx);
1923
a43abf29
ML		 1924 ifmgd->probe_send_count = 0;
1925 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12 1926 out:
8d61ffa5 1927 sdata_unlock(sdata);
04de8381
KV		 1928}
1929
a619a4c0
JO		 1930struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
1931 struct ieee80211_vif *vif)
1932{
1933 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1934 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d9b3b28b 1935 struct cfg80211_bss *cbss;
a619a4c0
JO		 1936 struct sk_buff *skb;
1937 const u8 *ssid;
88c868c4 1938 int ssid_len;
a619a4c0
JO		 1939
1940 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1941 return NULL;
1942
8d61ffa5 1943 sdata_assert_lock(sdata);
a619a4c0 1944
d9b3b28b
EP		 1945 if (ifmgd->associated)
1946 cbss = ifmgd->associated;
1947 else if (ifmgd->auth_data)
1948 cbss = ifmgd->auth_data->bss;
1949 else if (ifmgd->assoc_data)
1950 cbss = ifmgd->assoc_data->bss;
1951 else
a619a4c0
JO		 1952 return NULL;
1953
9caf0364 1954 rcu_read_lock();
d9b3b28b 1955 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
88c868c4
SG		 1956 if (WARN_ON_ONCE(ssid == NULL))
1957 ssid_len = 0;
1958 else
1959 ssid_len = ssid[1];
1960
d9b3b28b 1961 skb = ieee80211_build_probe_req(sdata, cbss->bssid,
55de908a 1962 (u32) -1, cbss->channel,
6b77863b 1963 ssid + 2, ssid_len,
85a237fe 1964 NULL, 0, true);
9caf0364 1965 rcu_read_unlock();
a619a4c0
JO		 1966
1967 return skb;
1968}
1969EXPORT_SYMBOL(ieee80211_ap_probereq_get);
1970
eef9e54c 1971static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
1e4dcd01
JO		 1972{
1973 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 1974 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
1e4dcd01 1975
8d61ffa5 1976 sdata_lock(sdata);
1e4dcd01 1977 if (!ifmgd->associated) {
8d61ffa5 1978 sdata_unlock(sdata);
1e4dcd01
JO		 1979 return;
1980 }
1981
37ad3888
JB		 1982 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
1983 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
eef9e54c 1984 true, frame_buf);
882a7c69 1985 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
7578d575 1986 sdata->vif.csa_active = false;
5b36ebd8 1987 ieee80211_wake_queues_by_reason(&sdata->local->hw,
445ea4e8 1988 IEEE80211_MAX_QUEUE_MAP,
5b36ebd8 1989 IEEE80211_QUEUE_STOP_REASON_CSA);
7da7cc1d 1990
6ff57cf8
JB		 1991 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
1992 IEEE80211_DEAUTH_FRAME_LEN);
8d61ffa5 1993 sdata_unlock(sdata);
1e4dcd01
JO		 1994}
1995
cc74c0c7 1996static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 1997{
1998 struct ieee80211_sub_if_data *sdata =
1999 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 2000 u.mgd.beacon_connection_loss_work);
a85e1d55
PS		 2001 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2002 struct sta_info *sta;
2003
2004 if (ifmgd->associated) {
30fa9047 2005 rcu_read_lock();
a85e1d55
PS		 2006 sta = sta_info_get(sdata, ifmgd->bssid);
2007 if (sta)
2008 sta->beacon_loss_count++;
30fa9047 2009 rcu_read_unlock();
a85e1d55 2010 }
b291ba11 2011
682bd38b 2012 if (ifmgd->connection_loss) {
882a7c69
JB		 2013 sdata_info(sdata, "Connection to AP %pM lost\n",
2014 ifmgd->bssid);
eef9e54c 2015 __ieee80211_disconnect(sdata);
882a7c69 2016 } else {
1e4dcd01 2017 ieee80211_mgd_probe_ap(sdata, true);
882a7c69
JB		 2018 }
2019}
2020
2021static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2022{
2023 struct ieee80211_sub_if_data *sdata =
2024 container_of(work, struct ieee80211_sub_if_data,
2025 u.mgd.csa_connection_drop_work);
2026
eef9e54c 2027 __ieee80211_disconnect(sdata);
b291ba11
JB		 2028}
2029
04de8381
KV		 2030void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2031{
2032 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 2033 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 2034
b5878a2d
JB		 2035 trace_api_beacon_loss(sdata);
2036
682bd38b 2037 sdata->u.mgd.connection_loss = false;
1e4dcd01 2038 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 2039}
2040EXPORT_SYMBOL(ieee80211_beacon_loss);
2041
1e4dcd01
JO		 2042void ieee80211_connection_loss(struct ieee80211_vif *vif)
2043{
2044 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2045 struct ieee80211_hw *hw = &sdata->local->hw;
2046
b5878a2d
JB		 2047 trace_api_connection_loss(sdata);
2048
682bd38b 2049 sdata->u.mgd.connection_loss = true;
1e4dcd01
JO		 2050 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2051}
2052EXPORT_SYMBOL(ieee80211_connection_loss);
2053
2054
66e67e41
JB		 2055static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2056 bool assoc)
2057{
2058 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2059
8d61ffa5 2060 sdata_assert_lock(sdata);
66e67e41 2061
66e67e41
JB		 2062 if (!assoc) {
2063 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2064
2065 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2066 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
028e8da0 2067 sdata->u.mgd.flags = 0;
55de908a 2068 ieee80211_vif_release_channel(sdata);
66e67e41
JB		 2069 }
2070
5b112d3d 2071 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
66e67e41
JB		 2072 kfree(auth_data);
2073 sdata->u.mgd.auth_data = NULL;
2074}
2075
2076static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2077 struct ieee80211_mgmt *mgmt, size_t len)
2078{
1672c0e3 2079 struct ieee80211_local *local = sdata->local;
66e67e41
JB		 2080 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2081 u8 *pos;
2082 struct ieee802_11_elems elems;
1672c0e3 2083 u32 tx_flags = 0;
66e67e41
JB		 2084
2085 pos = mgmt->u.auth.variable;
b2e506bf 2086 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
66e67e41
JB		 2087 if (!elems.challenge)
2088 return;
2089 auth_data->expected_transaction = 4;
a1845fc7 2090 drv_mgd_prepare_tx(sdata->local, sdata);
1672c0e3
JB		 2091 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2092 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2093 IEEE80211_TX_INTFL_MLME_CONN_TX;
700e8ea6 2094 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
66e67e41
JB		 2095 elems.challenge - 2, elems.challenge_len + 2,
2096 auth_data->bss->bssid, auth_data->bss->bssid,
2097 auth_data->key, auth_data->key_len,
1672c0e3 2098 auth_data->key_idx, tx_flags);
66e67e41
JB		 2099}
2100
8d61ffa5
JB		 2101static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2102 struct ieee80211_mgmt *mgmt, size_t len)
66e67e41
JB		 2103{
2104 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2105 u8 bssid[ETH_ALEN];
2106 u16 auth_alg, auth_transaction, status_code;
2107 struct sta_info *sta;
2108
8d61ffa5 2109 sdata_assert_lock(sdata);
66e67e41
JB		 2110
2111 if (len < 24 + 6)
8d61ffa5 2112 return;
66e67e41
JB		 2113
2114 if (!ifmgd->auth_data || ifmgd->auth_data->done)
8d61ffa5 2115 return;
66e67e41
JB		 2116
2117 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2118
b203ca39 2119 if (!ether_addr_equal(bssid, mgmt->bssid))
8d61ffa5 2120 return;
66e67e41
JB		 2121
2122 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2123 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2124 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2125
2126 if (auth_alg != ifmgd->auth_data->algorithm ||
0f4126e8
JM		 2127 auth_transaction != ifmgd->auth_data->expected_transaction) {
2128 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2129 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2130 auth_transaction,
2131 ifmgd->auth_data->expected_transaction);
8d61ffa5 2132 return;
0f4126e8 2133 }
66e67e41
JB		 2134
2135 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2136 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2137 mgmt->sa, status_code);
dac211ec 2138 ieee80211_destroy_auth_data(sdata, false);
6ff57cf8 2139 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
8d61ffa5 2140 return;
66e67e41
JB		 2141 }
2142
2143 switch (ifmgd->auth_data->algorithm) {
2144 case WLAN_AUTH_OPEN:
2145 case WLAN_AUTH_LEAP:
2146 case WLAN_AUTH_FT:
6b8ece3a 2147 case WLAN_AUTH_SAE:
66e67e41
JB		 2148 break;
2149 case WLAN_AUTH_SHARED_KEY:
2150 if (ifmgd->auth_data->expected_transaction != 4) {
2151 ieee80211_auth_challenge(sdata, mgmt, len);
2152 /* need another frame */
8d61ffa5 2153 return;
66e67e41
JB		 2154 }
2155 break;
2156 default:
2157 WARN_ONCE(1, "invalid auth alg %d",
2158 ifmgd->auth_data->algorithm);
8d61ffa5 2159 return;
66e67e41
JB		 2160 }
2161
bdcbd8e0 2162 sdata_info(sdata, "authenticated\n");
66e67e41
JB		 2163 ifmgd->auth_data->done = true;
2164 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
89afe614 2165 ifmgd->auth_data->timeout_started = true;
8d61ffa5 2166 run_again(sdata, ifmgd->auth_data->timeout);
66e67e41 2167
6b8ece3a
JM		 2168 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2169 ifmgd->auth_data->expected_transaction != 2) {
2170 /*
2171 * Report auth frame to user space for processing since another
2172 * round of Authentication frames is still needed.
2173 */
6ff57cf8 2174 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
8d61ffa5 2175 return;
6b8ece3a
JM		 2176 }
2177
66e67e41
JB		 2178 /* move station state to auth */
2179 mutex_lock(&sdata->local->sta_mtx);
2180 sta = sta_info_get(sdata, bssid);
2181 if (!sta) {
2182 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2183 goto out_err;
2184 }
2185 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
bdcbd8e0 2186 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
66e67e41
JB		 2187 goto out_err;
2188 }
2189 mutex_unlock(&sdata->local->sta_mtx);
2190
6ff57cf8 2191 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
8d61ffa5 2192 return;
66e67e41
JB		 2193 out_err:
2194 mutex_unlock(&sdata->local->sta_mtx);
2195 /* ignore frame -- wait for timeout */
66e67e41
JB		 2196}
2197
2198
8d61ffa5
JB		 2199static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2200 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2201{
46900298 2202 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 2203 const u8 *bssid = NULL;
f0706e82
JB		 2204 u16 reason_code;
2205
8d61ffa5 2206 sdata_assert_lock(sdata);
66e67e41 2207
f4ea83dd 2208 if (len < 24 + 2)
8d61ffa5 2209 return;
f0706e82 2210
66e67e41 2211 if (!ifmgd->associated ||
b203ca39 2212 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
8d61ffa5 2213 return;
77fdaa12 2214
0c1ad2ca 2215 bssid = ifmgd->associated->bssid;
f0706e82
JB		 2216
2217 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2218
bdcbd8e0
JB		 2219 sdata_info(sdata, "deauthenticated from %pM (Reason: %u)\n",
2220 bssid, reason_code);
77fdaa12 2221
37ad3888
JB		 2222 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2223
6ff57cf8 2224 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
f0706e82
JB		 2225}
2226
2227
8d61ffa5
JB		 2228static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2229 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2230{
46900298 2231 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 2232 u16 reason_code;
2233
8d61ffa5 2234 sdata_assert_lock(sdata);
77fdaa12 2235
66e67e41 2236 if (len < 24 + 2)
8d61ffa5 2237 return;
77fdaa12 2238
66e67e41 2239 if (!ifmgd->associated ||
b203ca39 2240 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
8d61ffa5 2241 return;
f0706e82
JB		 2242
2243 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2244
bdcbd8e0
JB		 2245 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2246 mgmt->sa, reason_code);
f0706e82 2247
37ad3888
JB		 2248 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2249
6ff57cf8 2250 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
f0706e82
JB		 2251}
2252
c74d084f
CL		 2253static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2254 u8 *supp_rates, unsigned int supp_rates_len,
2255 u32 *rates, u32 *basic_rates,
2256 bool *have_higher_than_11mbit,
2103dec1
SW		 2257 int *min_rate, int *min_rate_index,
2258 int shift, u32 rate_flags)
c74d084f
CL		 2259{
2260 int i, j;
2261
2262 for (i = 0; i < supp_rates_len; i++) {
2103dec1 2263 int rate = supp_rates[i] & 0x7f;
c74d084f
CL		 2264 bool is_basic = !!(supp_rates[i] & 0x80);
2265
2103dec1 2266 if ((rate * 5 * (1 << shift)) > 110)
c74d084f
CL		 2267 *have_higher_than_11mbit = true;
2268
2269 /*
2270 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2271 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2272 *
2273 * Note: Even through the membership selector and the basic
2274 * rate flag share the same bit, they are not exactly
2275 * the same.
2276 */
2277 if (!!(supp_rates[i] & 0x80) &&
2278 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2279 continue;
2280
2281 for (j = 0; j < sband->n_bitrates; j++) {
2103dec1
SW		 2282 struct ieee80211_rate *br;
2283 int brate;
2284
2285 br = &sband->bitrates[j];
2286 if ((rate_flags & br->flags) != rate_flags)
2287 continue;
2288
2289 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2290 if (brate == rate) {
c74d084f
CL		 2291 *rates |= BIT(j);
2292 if (is_basic)
2293 *basic_rates |= BIT(j);
2103dec1
SW		 2294 if ((rate * 5) < *min_rate) {
2295 *min_rate = rate * 5;
c74d084f
CL		 2296 *min_rate_index = j;
2297 }
2298 break;
2299 }
2300 }
2301 }
2302}
f0706e82 2303
66e67e41
JB		 2304static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2305 bool assoc)
2306{
2307 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2308
8d61ffa5 2309 sdata_assert_lock(sdata);
66e67e41 2310
66e67e41
JB		 2311 if (!assoc) {
2312 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2313
2314 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2315 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
028e8da0 2316 sdata->u.mgd.flags = 0;
55de908a 2317 ieee80211_vif_release_channel(sdata);
66e67e41
JB		 2318 }
2319
2320 kfree(assoc_data);
2321 sdata->u.mgd.assoc_data = NULL;
2322}
2323
2324static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2325 struct cfg80211_bss *cbss,
af6b6374 2326 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2327{
46900298 2328 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 2329 struct ieee80211_local *local = sdata->local;
8318d78a 2330 struct ieee80211_supported_band *sband;
f0706e82 2331 struct sta_info *sta;
af6b6374 2332 u8 *pos;
af6b6374 2333 u16 capab_info, aid;
f0706e82 2334 struct ieee802_11_elems elems;
bda3933a 2335 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
35d865af
JB		 2336 const struct cfg80211_bss_ies *bss_ies = NULL;
2337 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
ae5eb026 2338 u32 changed = 0;
c74d084f 2339 int err;
35d865af 2340 bool ret;
f0706e82 2341
af6b6374 2342 /* AssocResp and ReassocResp have identical structure */
f0706e82 2343
f0706e82 2344 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 2345 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 2346
1dd84aa2 2347 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
bdcbd8e0
JB		 2348 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2349 aid);
1dd84aa2
JB		 2350 aid &= ~(BIT(15) | BIT(14));
2351
05cb9108
JB		 2352 ifmgd->broken_ap = false;
2353
2354 if (aid == 0 || aid > IEEE80211_MAX_AID) {
bdcbd8e0
JB		 2355 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2356 aid);
05cb9108
JB		 2357 aid = 0;
2358 ifmgd->broken_ap = true;
2359 }
2360
af6b6374 2361 pos = mgmt->u.assoc_resp.variable;
b2e506bf 2362 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
af6b6374 2363
f0706e82 2364 if (!elems.supp_rates) {
bdcbd8e0 2365 sdata_info(sdata, "no SuppRates element in AssocResp\n");
af6b6374 2366 return false;
f0706e82
JB		 2367 }
2368
46900298 2369 ifmgd->aid = aid;
f0706e82 2370
35d865af
JB		 2371 /*
2372 * Some APs are erroneously not including some information in their
2373 * (re)association response frames. Try to recover by using the data
2374 * from the beacon or probe response. This seems to afflict mobile
2375 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2376 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2377 */
2378 if ((assoc_data->wmm && !elems.wmm_param) ||
2379 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2380 (!elems.ht_cap_elem || !elems.ht_operation)) ||
2381 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2382 (!elems.vht_cap_elem || !elems.vht_operation))) {
2383 const struct cfg80211_bss_ies *ies;
2384 struct ieee802_11_elems bss_elems;
2385
2386 rcu_read_lock();
2387 ies = rcu_dereference(cbss->ies);
2388 if (ies)
2389 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2390 GFP_ATOMIC);
2391 rcu_read_unlock();
2392 if (!bss_ies)
2393 return false;
2394
2395 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2396 false, &bss_elems);
2397 if (assoc_data->wmm &&
2398 !elems.wmm_param && bss_elems.wmm_param) {
2399 elems.wmm_param = bss_elems.wmm_param;
2400 sdata_info(sdata,
2401 "AP bug: WMM param missing from AssocResp\n");
2402 }
2403
2404 /*
2405 * Also check if we requested HT/VHT, otherwise the AP doesn't
2406 * have to include the IEs in the (re)association response.
2407 */
2408 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2409 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2410 elems.ht_cap_elem = bss_elems.ht_cap_elem;
2411 sdata_info(sdata,
2412 "AP bug: HT capability missing from AssocResp\n");
2413 }
2414 if (!elems.ht_operation && bss_elems.ht_operation &&
2415 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2416 elems.ht_operation = bss_elems.ht_operation;
2417 sdata_info(sdata,
2418 "AP bug: HT operation missing from AssocResp\n");
2419 }
2420 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2421 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2422 elems.vht_cap_elem = bss_elems.vht_cap_elem;
2423 sdata_info(sdata,
2424 "AP bug: VHT capa missing from AssocResp\n");
2425 }
2426 if (!elems.vht_operation && bss_elems.vht_operation &&
2427 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2428 elems.vht_operation = bss_elems.vht_operation;
2429 sdata_info(sdata,
2430 "AP bug: VHT operation missing from AssocResp\n");
2431 }
2432 }
2433
30eb1dc2
JB		 2434 /*
2435 * We previously checked these in the beacon/probe response, so
2436 * they should be present here. This is just a safety net.
2437 */
2438 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2439 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2440 sdata_info(sdata,
35d865af
JB		 2441 "HT AP is missing WMM params or HT capability/operation\n");
2442 ret = false;
2443 goto out;
30eb1dc2
JB		 2444 }
2445
2446 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2447 (!elems.vht_cap_elem || !elems.vht_operation)) {
2448 sdata_info(sdata,
35d865af
JB		 2449 "VHT AP is missing VHT capability/operation\n");
2450 ret = false;
2451 goto out;
30eb1dc2
JB		 2452 }
2453
2a33bee2
GE		 2454 mutex_lock(&sdata->local->sta_mtx);
2455 /*
2456 * station info was already allocated and inserted before
2457 * the association and should be available to us
2458 */
7852e361 2459 sta = sta_info_get(sdata, cbss->bssid);
2a33bee2
GE		 2460 if (WARN_ON(!sta)) {
2461 mutex_unlock(&sdata->local->sta_mtx);
35d865af
JB		 2462 ret = false;
2463 goto out;
77fdaa12 2464 }
05e5e883 2465
55de908a 2466 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
f709fc69 2467
30eb1dc2 2468 /* Set up internal HT/VHT capabilities */
a8243b72 2469 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
ef96a842 2470 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
e1a0c6b3 2471 elems.ht_cap_elem, sta);
64f68e5d 2472
818255ea
MP		 2473 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2474 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
4a34215e 2475 elems.vht_cap_elem, sta);
818255ea 2476
30eb1dc2
JB		 2477 /*
2478 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
2479 * in their association response, so ignore that data for our own
2480 * configuration. If it changed since the last beacon, we'll get the
2481 * next beacon and update then.
2482 */
1128958d 2483
bee7f586
JB		 2484 /*
2485 * If an operating mode notification IE is present, override the
2486 * NSS calculation (that would be done in rate_control_rate_init())
2487 * and use the # of streams from that element.
2488 */
2489 if (elems.opmode_notif &&
2490 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
2491 u8 nss;
2492
2493 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
2494 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
2495 nss += 1;
2496 sta->sta.rx_nss = nss;
2497 }
2498
4b7679a5 2499 rate_control_rate_init(sta);
f0706e82 2500
46900298 2501 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
c2c98fde 2502 set_sta_flag(sta, WLAN_STA_MFP);
5394af4d 2503
ddf4ac53 2504 if (elems.wmm_param)
c2c98fde 2505 set_sta_flag(sta, WLAN_STA_WME);
ddf4ac53 2506
3e4d40fa 2507 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
c8987876
JB		 2508 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2509 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2510 if (err) {
bdcbd8e0
JB		 2511 sdata_info(sdata,
2512 "failed to move station %pM to desired state\n",
2513 sta->sta.addr);
c8987876
JB		 2514 WARN_ON(__sta_info_destroy(sta));
2515 mutex_unlock(&sdata->local->sta_mtx);
35d865af
JB		 2516 ret = false;
2517 goto out;
c8987876
JB		 2518 }
2519
7852e361 2520 mutex_unlock(&sdata->local->sta_mtx);
ddf4ac53 2521
f2176d72
JO		 2522 /*
2523 * Always handle WMM once after association regardless
2524 * of the first value the AP uses. Setting -1 here has
2525 * that effect because the AP values is an unsigned
2526 * 4-bit value.
2527 */
2528 ifmgd->wmm_last_param_set = -1;
2529
ddf4ac53 2530 if (elems.wmm_param)
4ced3f74 2531 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 2532 elems.wmm_param_len);
aa837e1d 2533 else
3abead59
JB		 2534 ieee80211_set_wmm_default(sdata, false);
2535 changed |= BSS_CHANGED_QOS;
f0706e82 2536
60f8b39c
JB		 2537 /* set AID and assoc capability,
2538 * ieee80211_set_associated() will tell the driver */
2539 bss_conf->aid = aid;
2540 bss_conf->assoc_capability = capab_info;
0c1ad2ca 2541 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 2542
d524215f
FF		 2543 /*
2544 * If we're using 4-addr mode, let the AP know that we're
2545 * doing so, so that it can create the STA VLAN on its side
2546 */
2547 if (ifmgd->use_4addr)
2548 ieee80211_send_4addr_nullfunc(local, sdata);
2549
15b7b062 2550 /*
b291ba11
JB		 2551 * Start timer to probe the connection to the AP now.
2552 * Also start the timer that will detect beacon loss.
15b7b062 2553 */
b291ba11 2554 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 2555 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 2556
35d865af
JB		 2557 ret = true;
2558 out:
2559 kfree(bss_ies);
2560 return ret;
f0706e82
JB		 2561}
2562
8d61ffa5
JB		 2563static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2564 struct ieee80211_mgmt *mgmt,
2565 size_t len)
66e67e41
JB		 2566{
2567 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2568 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2569 u16 capab_info, status_code, aid;
2570 struct ieee802_11_elems elems;
2571 u8 *pos;
2572 bool reassoc;
8d61ffa5 2573 struct cfg80211_bss *bss;
66e67e41 2574
8d61ffa5 2575 sdata_assert_lock(sdata);
66e67e41
JB		 2576
2577 if (!assoc_data)
8d61ffa5 2578 return;
b203ca39 2579 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
8d61ffa5 2580 return;
66e67e41
JB		 2581
2582 /*
2583 * AssocResp and ReassocResp have identical structure, so process both
2584 * of them in this function.
2585 */
2586
2587 if (len < 24 + 6)
8d61ffa5 2588 return;
66e67e41
JB		 2589
2590 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2591 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2592 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2593 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2594
bdcbd8e0
JB		 2595 sdata_info(sdata,
2596 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2597 reassoc ? "Rea" : "A", mgmt->sa,
2598 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
66e67e41
JB		 2599
2600 pos = mgmt->u.assoc_resp.variable;
b2e506bf 2601 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
66e67e41
JB		 2602
2603 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
79ba1d89
JB		 2604 elems.timeout_int &&
2605 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
66e67e41 2606 u32 tu, ms;
79ba1d89 2607 tu = le32_to_cpu(elems.timeout_int->value);
66e67e41 2608 ms = tu * 1024 / 1000;
bdcbd8e0
JB		 2609 sdata_info(sdata,
2610 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2611 mgmt->sa, tu, ms);
66e67e41 2612 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
89afe614 2613 assoc_data->timeout_started = true;
66e67e41 2614 if (ms > IEEE80211_ASSOC_TIMEOUT)
8d61ffa5
JB		 2615 run_again(sdata, assoc_data->timeout);
2616 return;
66e67e41
JB		 2617 }
2618
8d61ffa5 2619 bss = assoc_data->bss;
66e67e41
JB		 2620
2621 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2622 sdata_info(sdata, "%pM denied association (code=%d)\n",
2623 mgmt->sa, status_code);
66e67e41
JB		 2624 ieee80211_destroy_assoc_data(sdata, false);
2625 } else {
8d61ffa5 2626 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
66e67e41 2627 /* oops -- internal error -- send timeout for now */
10a9109f 2628 ieee80211_destroy_assoc_data(sdata, false);
959867fa 2629 cfg80211_assoc_timeout(sdata->dev, bss);
8d61ffa5 2630 return;
66e67e41 2631 }
635d999f 2632 sdata_info(sdata, "associated\n");
79ebfb85
JB		 2633
2634 /*
2635 * destroy assoc_data afterwards, as otherwise an idle
2636 * recalc after assoc_data is NULL but before associated
2637 * is set can cause the interface to go idle
2638 */
2639 ieee80211_destroy_assoc_data(sdata, true);
66e67e41
JB		 2640 }
2641
6ff57cf8 2642 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len);
66e67e41 2643}
8e3c1b77 2644
98c8fccf 2645static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
8e3c1b77 2646 struct ieee80211_mgmt *mgmt, size_t len,
98c8fccf 2647 struct ieee80211_rx_status *rx_status,
d45c4172 2648 struct ieee802_11_elems *elems)
98c8fccf
JB		 2649{
2650 struct ieee80211_local *local = sdata->local;
2651 int freq;
c2b13452 2652 struct ieee80211_bss *bss;
98c8fccf 2653 struct ieee80211_channel *channel;
56007a02 2654
8d61ffa5 2655 sdata_assert_lock(sdata);
b4f286a1 2656
1cd8e88e 2657 if (elems->ds_params)
59eb21a6
BR		 2658 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
2659 rx_status->band);
98c8fccf
JB		 2660 else
2661 freq = rx_status->freq;
2662
2663 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2664
2665 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2666 return;
2667
98c8fccf 2668 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
d45c4172 2669 channel);
817cee76 2670 if (bss) {
77fdaa12 2671 ieee80211_rx_bss_put(local, bss);
817cee76
AB		 2672 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
2673 }
f0706e82
JB		 2674}
2675
2676
f698d856 2677static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 2678 struct sk_buff *skb)
f0706e82 2679{
af6b6374 2680 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 2681 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 2682 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2683 size_t baselen, len = skb->len;
ae6a44e3
EK		 2684 struct ieee802_11_elems elems;
2685
15b7b062
KV		 2686 ifmgd = &sdata->u.mgd;
2687
8d61ffa5 2688 sdata_assert_lock(sdata);
77fdaa12 2689
b203ca39 2690 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
8e7cdbb6
TW		 2691 return; /* ignore ProbeResp to foreign address */
2692
ae6a44e3
EK		 2693 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2694 if (baselen > len)
2695 return;
2696
2697 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
b2e506bf 2698 false, &elems);
ae6a44e3 2699
d45c4172 2700 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
9859b81e 2701
77fdaa12 2702 if (ifmgd->associated &&
b203ca39 2703 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
4e5ff376 2704 ieee80211_reset_ap_probe(sdata);
66e67e41
JB		 2705
2706 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
b203ca39 2707 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
66e67e41 2708 /* got probe response, continue with auth */
bdcbd8e0 2709 sdata_info(sdata, "direct probe responded\n");
66e67e41
JB		 2710 ifmgd->auth_data->tries = 0;
2711 ifmgd->auth_data->timeout = jiffies;
89afe614 2712 ifmgd->auth_data->timeout_started = true;
8d61ffa5 2713 run_again(sdata, ifmgd->auth_data->timeout);
66e67e41 2714 }
f0706e82
JB		 2715}
2716
d91f36db
JB		 2717/*
2718 * This is the canonical list of information elements we care about,
2719 * the filter code also gives us all changes to the Microsoft OUI
2720 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2721 *
2722 * We implement beacon filtering in software since that means we can
2723 * avoid processing the frame here and in cfg80211, and userspace
2724 * will not be able to tell whether the hardware supports it or not.
2725 *
2726 * XXX: This list needs to be dynamic -- userspace needs to be able to
2727 * add items it requires. It also needs to be able to tell us to
2728 * look out for other vendor IEs.
2729 */
2730static const u64 care_about_ies =
1d4df3a5
JB		 2731 (1ULL << WLAN_EID_COUNTRY) |
2732 (1ULL << WLAN_EID_ERP_INFO) |
2733 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2734 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2735 (1ULL << WLAN_EID_HT_CAPABILITY) |
074d46d1 2736 (1ULL << WLAN_EID_HT_OPERATION);
d91f36db 2737
8d61ffa5
JB		 2738static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
2739 struct ieee80211_mgmt *mgmt, size_t len,
2740 struct ieee80211_rx_status *rx_status)
f0706e82 2741{
d91f36db 2742 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 2743 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 2744 size_t baselen;
2745 struct ieee802_11_elems elems;
f698d856 2746 struct ieee80211_local *local = sdata->local;
55de908a
JB		 2747 struct ieee80211_chanctx_conf *chanctx_conf;
2748 struct ieee80211_channel *chan;
bee7f586 2749 struct sta_info *sta;
471b3efd 2750 u32 changed = 0;
f87ad637 2751 bool erp_valid;
7a5158ef 2752 u8 erp_value = 0;
d91f36db 2753 u32 ncrc;
77fdaa12 2754 u8 *bssid;
8d61ffa5 2755 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
77fdaa12 2756
8d61ffa5 2757 sdata_assert_lock(sdata);
f0706e82 2758
ae6a44e3
EK		 2759 /* Process beacon from the current BSS */
2760 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2761 if (baselen > len)
8d61ffa5 2762 return;
ae6a44e3 2763
55de908a
JB		 2764 rcu_read_lock();
2765 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2766 if (!chanctx_conf) {
2767 rcu_read_unlock();
8d61ffa5 2768 return;
55de908a
JB		 2769 }
2770
4bf88530 2771 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
55de908a 2772 rcu_read_unlock();
8d61ffa5 2773 return;
55de908a 2774 }
4bf88530 2775 chan = chanctx_conf->def.chan;
55de908a 2776 rcu_read_unlock();
f0706e82 2777
c65dd147 2778 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
b203ca39 2779 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
66e67e41 2780 ieee802_11_parse_elems(mgmt->u.beacon.variable,
b2e506bf 2781 len - baselen, false, &elems);
77fdaa12 2782
d45c4172 2783 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
482a9c74
AB		 2784 if (elems.tim && !elems.parse_error) {
2785 const struct ieee80211_tim_ie *tim_ie = elems.tim;
2786 ifmgd->dtim_period = tim_ie->dtim_period;
2787 }
989c6505 2788 ifmgd->have_beacon = true;
c65dd147 2789 ifmgd->assoc_data->need_beacon = false;
ef429dad
JB		 2790 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
2791 sdata->vif.bss_conf.sync_tsf =
2792 le64_to_cpu(mgmt->u.beacon.timestamp);
2793 sdata->vif.bss_conf.sync_device_ts =
2794 rx_status->device_timestamp;
2795 if (elems.tim)
2796 sdata->vif.bss_conf.sync_dtim_count =
2797 elems.tim->dtim_count;
2798 else
2799 sdata->vif.bss_conf.sync_dtim_count = 0;
2800 }
66e67e41
JB		 2801 /* continue assoc process */
2802 ifmgd->assoc_data->timeout = jiffies;
89afe614 2803 ifmgd->assoc_data->timeout_started = true;
8d61ffa5
JB		 2804 run_again(sdata, ifmgd->assoc_data->timeout);
2805 return;
66e67e41 2806 }
77fdaa12 2807
66e67e41 2808 if (!ifmgd->associated ||
b203ca39 2809 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
8d61ffa5 2810 return;
66e67e41 2811 bssid = ifmgd->associated->bssid;
f0706e82 2812
17e4ec14
JM		 2813 /* Track average RSSI from the Beacon frames of the current AP */
2814 ifmgd->last_beacon_signal = rx_status->signal;
2815 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
2816 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3ba06c6f 2817 ifmgd->ave_beacon_signal = rx_status->signal * 16;
17e4ec14 2818 ifmgd->last_cqm_event_signal = 0;
391a200a 2819 ifmgd->count_beacon_signal = 1;
615f7b9b 2820 ifmgd->last_ave_beacon_signal = 0;
17e4ec14
JM		 2821 } else {
2822 ifmgd->ave_beacon_signal =
2823 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
2824 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
2825 ifmgd->ave_beacon_signal) / 16;
391a200a 2826 ifmgd->count_beacon_signal++;
17e4ec14 2827 }
615f7b9b
MV		 2828
2829 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
2830 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
2831 int sig = ifmgd->ave_beacon_signal;
2832 int last_sig = ifmgd->last_ave_beacon_signal;
2833
2834 /*
2835 * if signal crosses either of the boundaries, invoke callback
2836 * with appropriate parameters
2837 */
2838 if (sig > ifmgd->rssi_max_thold &&
2839 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
2840 ifmgd->last_ave_beacon_signal = sig;
887da917 2841 drv_rssi_callback(local, sdata, RSSI_EVENT_HIGH);
615f7b9b
MV		 2842 } else if (sig < ifmgd->rssi_min_thold &&
2843 (last_sig >= ifmgd->rssi_max_thold ||
2844 last_sig == 0)) {
2845 ifmgd->last_ave_beacon_signal = sig;
887da917 2846 drv_rssi_callback(local, sdata, RSSI_EVENT_LOW);
615f7b9b
MV		 2847 }
2848 }
2849
17e4ec14 2850 if (bss_conf->cqm_rssi_thold &&
391a200a 2851 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
ea086359 2852 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
17e4ec14
JM		 2853 int sig = ifmgd->ave_beacon_signal / 16;
2854 int last_event = ifmgd->last_cqm_event_signal;
2855 int thold = bss_conf->cqm_rssi_thold;
2856 int hyst = bss_conf->cqm_rssi_hyst;
2857 if (sig < thold &&
2858 (last_event == 0 || sig < last_event - hyst)) {
2859 ifmgd->last_cqm_event_signal = sig;
2860 ieee80211_cqm_rssi_notify(
2861 &sdata->vif,
2862 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
2863 GFP_KERNEL);
2864 } else if (sig > thold &&
2865 (last_event == 0 || sig > last_event + hyst)) {
2866 ifmgd->last_cqm_event_signal = sig;
2867 ieee80211_cqm_rssi_notify(
2868 &sdata->vif,
2869 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
2870 GFP_KERNEL);
2871 }
2872 }
2873
392b9ffb 2874 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
bdcbd8e0 2875 mlme_dbg_ratelimited(sdata,
112c31f0 2876 "cancelling AP probe due to a received beacon\n");
392b9ffb 2877 ieee80211_reset_ap_probe(sdata);
92778180
JM		 2878 }
2879
b291ba11
JB		 2880 /*
2881 * Push the beacon loss detection into the future since
2882 * we are processing a beacon from the AP just now.
2883 */
d3a910a8 2884 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 2885
d91f36db
JB		 2886 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
2887 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
b2e506bf 2888 len - baselen, false, &elems,
d91f36db
JB		 2889 care_about_ies, ncrc);
2890
25c9c875 2891 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
f87ad637
RR		 2892 bool directed_tim = ieee80211_check_tim(elems.tim,
2893 elems.tim_len,
2894 ifmgd->aid);
1fb3606b 2895 if (directed_tim) {
572e0012 2896 if (local->hw.conf.dynamic_ps_timeout > 0) {
70b12f26
RW		 2897 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2898 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2899 ieee80211_hw_config(local,
2900 IEEE80211_CONF_CHANGE_PS);
2901 }
572e0012 2902 ieee80211_send_nullfunc(local, sdata, 0);
6f0756a3 2903 } else if (!local->pspolling && sdata->u.mgd.powersave) {
572e0012
KV		 2904 local->pspolling = true;
2905
2906 /*
2907 * Here is assumed that the driver will be
2908 * able to send ps-poll frame and receive a
2909 * response even though power save mode is
2910 * enabled, but some drivers might require
2911 * to disable power save here. This needs
2912 * to be investigated.
2913 */
2914 ieee80211_send_pspoll(local, sdata);
2915 }
a97b77b9
VN		 2916 }
2917 }
7a5158ef 2918
488dd7b5 2919 if (sdata->vif.p2p) {
67baf663 2920 struct ieee80211_p2p_noa_attr noa = {};
488dd7b5
JB		 2921 int ret;
2922
2923 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
2924 len - baselen,
2925 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
934457ee 2926 (u8 *) &noa, sizeof(noa));
67baf663
JD		 2927 if (ret >= 2) {
2928 if (sdata->u.mgd.p2p_noa_index != noa.index) {
2929 /* valid noa_attr and index changed */
2930 sdata->u.mgd.p2p_noa_index = noa.index;
2931 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
2932 changed |= BSS_CHANGED_P2P_PS;
2933 /*
2934 * make sure we update all information, the CRC
2935 * mechanism doesn't look at P2P attributes.
2936 */
2937 ifmgd->beacon_crc_valid = false;
2938 }
2939 } else if (sdata->u.mgd.p2p_noa_index != -1) {
2940 /* noa_attr not found and we had valid noa_attr before */
2941 sdata->u.mgd.p2p_noa_index = -1;
2942 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
488dd7b5 2943 changed |= BSS_CHANGED_P2P_PS;
488dd7b5
JB		 2944 ifmgd->beacon_crc_valid = false;
2945 }
2946 }
2947
d8ec4433 2948 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
8d61ffa5 2949 return;
30196673 2950 ifmgd->beacon_crc = ncrc;
d8ec4433 2951 ifmgd->beacon_crc_valid = true;
30196673 2952
d45c4172 2953 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
7d25745d 2954
d70b7616
JB		 2955 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
2956 &elems, true);
2957
7d25745d
JB		 2958 if (ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2959 elems.wmm_param_len))
2960 changed |= BSS_CHANGED_QOS;
2961
c65dd147
EG		 2962 /*
2963 * If we haven't had a beacon before, tell the driver about the
ef429dad 2964 * DTIM period (and beacon timing if desired) now.
c65dd147 2965 */
989c6505 2966 if (!ifmgd->have_beacon) {
c65dd147
EG		 2967 /* a few bogus AP send dtim_period = 0 or no TIM IE */
2968 if (elems.tim)
2969 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
2970 else
2971 bss_conf->dtim_period = 1;
ef429dad
JB		 2972
2973 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
2974 sdata->vif.bss_conf.sync_tsf =
2975 le64_to_cpu(mgmt->u.beacon.timestamp);
2976 sdata->vif.bss_conf.sync_device_ts =
2977 rx_status->device_timestamp;
2978 if (elems.tim)
2979 sdata->vif.bss_conf.sync_dtim_count =
2980 elems.tim->dtim_count;
2981 else
2982 sdata->vif.bss_conf.sync_dtim_count = 0;
2983 }
2984
989c6505
AB		 2985 changed |= BSS_CHANGED_BEACON_INFO;
2986 ifmgd->have_beacon = true;
482a9c74
AB		 2987
2988 mutex_lock(&local->iflist_mtx);
2989 ieee80211_recalc_ps(local, -1);
2990 mutex_unlock(&local->iflist_mtx);
2991
ce857888 2992 ieee80211_recalc_ps_vif(sdata);
c65dd147
EG		 2993 }
2994
1946bed9 2995 if (elems.erp_info) {
7a5158ef
JB		 2996 erp_valid = true;
2997 erp_value = elems.erp_info[0];
2998 } else {
2999 erp_valid = false;
50c4afb9 3000 }
7a5158ef
JB		 3001 changed |= ieee80211_handle_bss_capability(sdata,
3002 le16_to_cpu(mgmt->u.beacon.capab_info),
3003 erp_valid, erp_value);
f0706e82 3004
1128958d 3005 mutex_lock(&local->sta_mtx);
bee7f586
JB		 3006 sta = sta_info_get(sdata, bssid);
3007
30eb1dc2
JB		 3008 if (ieee80211_config_bw(sdata, sta, elems.ht_operation,
3009 elems.vht_operation, bssid, &changed)) {
3010 mutex_unlock(&local->sta_mtx);
3011 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3012 WLAN_REASON_DEAUTH_LEAVING,
3013 true, deauth_buf);
6ff57cf8
JB		 3014 cfg80211_tx_mlme_mgmt(sdata->dev, deauth_buf,
3015 sizeof(deauth_buf));
8d61ffa5 3016 return;
30eb1dc2 3017 }
bee7f586
JB		 3018
3019 if (sta && elems.opmode_notif)
3020 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3021 rx_status->band, true);
1128958d 3022 mutex_unlock(&local->sta_mtx);
d3c990fb 3023
04b7b2ff
JB		 3024 if (elems.country_elem && elems.pwr_constr_elem &&
3025 mgmt->u.probe_resp.capab_info &
3026 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT))
1ea6f9c0
JB		 3027 changed |= ieee80211_handle_pwr_constr(sdata, chan,
3028 elems.country_elem,
3029 elems.country_elem_len,
3030 elems.pwr_constr_elem);
3f2355cb 3031
471b3efd 3032 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 3033}
3034
1fa57d01
JB		 3035void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3036 struct sk_buff *skb)
f0706e82
JB		 3037{
3038 struct ieee80211_rx_status *rx_status;
f0706e82
JB		 3039 struct ieee80211_mgmt *mgmt;
3040 u16 fc;
1b3a2e49
JB		 3041 struct ieee802_11_elems elems;
3042 int ies_len;
f0706e82 3043
f0706e82
JB		 3044 rx_status = (struct ieee80211_rx_status *) skb->cb;
3045 mgmt = (struct ieee80211_mgmt *) skb->data;
3046 fc = le16_to_cpu(mgmt->frame_control);
3047
8d61ffa5 3048 sdata_lock(sdata);
77fdaa12 3049
66e67e41
JB		 3050 switch (fc & IEEE80211_FCTL_STYPE) {
3051 case IEEE80211_STYPE_BEACON:
8d61ffa5 3052 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
66e67e41
JB		 3053 break;
3054 case IEEE80211_STYPE_PROBE_RESP:
3055 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3056 break;
3057 case IEEE80211_STYPE_AUTH:
8d61ffa5 3058 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
66e67e41
JB		 3059 break;
3060 case IEEE80211_STYPE_DEAUTH:
8d61ffa5 3061 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
66e67e41
JB		 3062 break;
3063 case IEEE80211_STYPE_DISASSOC:
8d61ffa5 3064 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
66e67e41
JB		 3065 break;
3066 case IEEE80211_STYPE_ASSOC_RESP:
3067 case IEEE80211_STYPE_REASSOC_RESP:
8d61ffa5 3068 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
66e67e41
JB		 3069 break;
3070 case IEEE80211_STYPE_ACTION:
37799e52 3071 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
1b3a2e49
JB		 3072 ies_len = skb->len -
3073 offsetof(struct ieee80211_mgmt,
3074 u.action.u.chan_switch.variable);
37799e52
JB		 3075
3076 if (ies_len < 0)
3077 break;
3078
3079 ieee802_11_parse_elems(
3080 mgmt->u.action.u.chan_switch.variable,
b2e506bf 3081 ies_len, true, &elems);
37799e52
JB		 3082
3083 if (elems.parse_error)
3084 break;
3085
1b3a2e49
JB		 3086 ieee80211_sta_process_chanswitch(sdata,
3087 rx_status->mactime,
04a161f4 3088 &elems, false);
1b3a2e49
JB		 3089 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3090 ies_len = skb->len -
3091 offsetof(struct ieee80211_mgmt,
3092 u.action.u.ext_chan_switch.variable);
3093
3094 if (ies_len < 0)
3095 break;
3096
3097 ieee802_11_parse_elems(
3098 mgmt->u.action.u.ext_chan_switch.variable,
b2e506bf 3099 ies_len, true, &elems);
1b3a2e49
JB		 3100
3101 if (elems.parse_error)
3102 break;
3103
3104 /* for the handling code pretend this was also an IE */
3105 elems.ext_chansw_ie =
3106 &mgmt->u.action.u.ext_chan_switch.data;
3107
66e67e41 3108 ieee80211_sta_process_chanswitch(sdata,
37799e52 3109 rx_status->mactime,
04a161f4 3110 &elems, false);
77fdaa12 3111 }
37799e52 3112 break;
77fdaa12 3113 }
8d61ffa5 3114 sdata_unlock(sdata);
f0706e82
JB		 3115}
3116
9c6bd790 3117static void ieee80211_sta_timer(unsigned long data)
f0706e82 3118{
60f8b39c
JB		 3119 struct ieee80211_sub_if_data *sdata =
3120 (struct ieee80211_sub_if_data *) data;
5bb644a0 3121
9b7d72c1 3122 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
f0706e82
JB		 3123}
3124
04ac3c0e 3125static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
6b684db1 3126 u8 *bssid, u8 reason, bool tx)
04ac3c0e 3127{
6ae16775 3128 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
04ac3c0e 3129
37ad3888 3130 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
6b684db1 3131 tx, frame_buf);
37ad3888 3132
6ff57cf8
JB		 3133 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3134 IEEE80211_DEAUTH_FRAME_LEN);
04ac3c0e
FF		 3135}
3136
66e67e41
JB		 3137static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
3138{
3139 struct ieee80211_local *local = sdata->local;
3140 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3141 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
1672c0e3 3142 u32 tx_flags = 0;
66e67e41 3143
8d61ffa5 3144 sdata_assert_lock(sdata);
66e67e41
JB		 3145
3146 if (WARN_ON_ONCE(!auth_data))
3147 return -EINVAL;
3148
66e67e41
JB		 3149 auth_data->tries++;
3150
3151 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
bdcbd8e0
JB		 3152 sdata_info(sdata, "authentication with %pM timed out\n",
3153 auth_data->bss->bssid);
66e67e41
JB		 3154
3155 /*
3156 * Most likely AP is not in the range so remove the
3157 * bss struct for that AP.
3158 */
3159 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3160
3161 return -ETIMEDOUT;
3162 }
3163
a1845fc7
JB		 3164 drv_mgd_prepare_tx(local, sdata);
3165
66e67e41 3166 if (auth_data->bss->proberesp_ies) {
6b8ece3a
JM		 3167 u16 trans = 1;
3168 u16 status = 0;
3169
bdcbd8e0
JB		 3170 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3171 auth_data->bss->bssid, auth_data->tries,
3172 IEEE80211_AUTH_MAX_TRIES);
66e67e41
JB		 3173
3174 auth_data->expected_transaction = 2;
6b8ece3a
JM		 3175
3176 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3177 trans = auth_data->sae_trans;
3178 status = auth_data->sae_status;
3179 auth_data->expected_transaction = trans;
3180 }
3181
6211dd12
SG		 3182 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3183 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3184 IEEE80211_TX_INTFL_MLME_CONN_TX;
3185
6b8ece3a
JM		 3186 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3187 auth_data->data, auth_data->data_len,
66e67e41 3188 auth_data->bss->bssid,
1672c0e3
JB		 3189 auth_data->bss->bssid, NULL, 0, 0,
3190 tx_flags);
66e67e41
JB		 3191 } else {
3192 const u8 *ssidie;
3193
bdcbd8e0
JB		 3194 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
3195 auth_data->bss->bssid, auth_data->tries,
3196 IEEE80211_AUTH_MAX_TRIES);
66e67e41 3197
9caf0364 3198 rcu_read_lock();
66e67e41 3199 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
9caf0364
JB		 3200 if (!ssidie) {
3201 rcu_read_unlock();
66e67e41 3202 return -EINVAL;
9caf0364 3203 }
66e67e41
JB		 3204 /*
3205 * Direct probe is sent to broadcast address as some APs
3206 * will not answer to direct packet in unassociated state.
3207 */
3208 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
6211dd12 3209 NULL, 0, (u32) -1, true, 0,
55de908a 3210 auth_data->bss->channel, false);
9caf0364 3211 rcu_read_unlock();
66e67e41
JB		 3212 }
3213
6211dd12 3214 if (tx_flags == 0) {
1672c0e3 3215 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
cb236d2d 3216 auth_data->timeout_started = true;
8d61ffa5 3217 run_again(sdata, auth_data->timeout);
89afe614 3218 } else {
cb236d2d
JB		 3219 auth_data->timeout =
3220 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3221 auth_data->timeout_started = true;
3222 run_again(sdata, auth_data->timeout);
1672c0e3 3223 }
66e67e41
JB		 3224
3225 return 0;
3226}
3227
3228static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3229{
3230 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3231 struct ieee80211_local *local = sdata->local;
3232
8d61ffa5 3233 sdata_assert_lock(sdata);
66e67e41 3234
66e67e41
JB		 3235 assoc_data->tries++;
3236 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
bdcbd8e0
JB		 3237 sdata_info(sdata, "association with %pM timed out\n",
3238 assoc_data->bss->bssid);
66e67e41
JB		 3239
3240 /*
3241 * Most likely AP is not in the range so remove the
3242 * bss struct for that AP.
3243 */
3244 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3245
3246 return -ETIMEDOUT;
3247 }
3248
bdcbd8e0
JB		 3249 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3250 assoc_data->bss->bssid, assoc_data->tries,
3251 IEEE80211_ASSOC_MAX_TRIES);
66e67e41
JB		 3252 ieee80211_send_assoc(sdata);
3253
1672c0e3
JB		 3254 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
3255 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
89afe614 3256 assoc_data->timeout_started = true;
8d61ffa5 3257 run_again(sdata, assoc_data->timeout);
89afe614 3258 } else {
cb236d2d
JB		 3259 assoc_data->timeout =
3260 round_jiffies_up(jiffies +
3261 IEEE80211_ASSOC_TIMEOUT_LONG);
3262 assoc_data->timeout_started = true;
3263 run_again(sdata, assoc_data->timeout);
1672c0e3 3264 }
66e67e41
JB		 3265
3266 return 0;
3267}
3268
1672c0e3
JB		 3269void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3270 __le16 fc, bool acked)
3271{
3272 struct ieee80211_local *local = sdata->local;
3273
3274 sdata->u.mgd.status_fc = fc;
3275 sdata->u.mgd.status_acked = acked;
3276 sdata->u.mgd.status_received = true;
3277
3278 ieee80211_queue_work(&local->hw, &sdata->work);
3279}
3280
1fa57d01 3281void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 3282{
9c6bd790 3283 struct ieee80211_local *local = sdata->local;
1fa57d01 3284 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 3285
8d61ffa5 3286 sdata_lock(sdata);
77fdaa12 3287
1672c0e3
JB		 3288 if (ifmgd->status_received) {
3289 __le16 fc = ifmgd->status_fc;
3290 bool status_acked = ifmgd->status_acked;
3291
3292 ifmgd->status_received = false;
3293 if (ifmgd->auth_data &&
3294 (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) {
3295 if (status_acked) {
3296 ifmgd->auth_data->timeout =
3297 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
8d61ffa5 3298 run_again(sdata, ifmgd->auth_data->timeout);
1672c0e3
JB		 3299 } else {
3300 ifmgd->auth_data->timeout = jiffies - 1;
3301 }
89afe614 3302 ifmgd->auth_data->timeout_started = true;
1672c0e3
JB		 3303 } else if (ifmgd->assoc_data &&
3304 (ieee80211_is_assoc_req(fc) ||
3305 ieee80211_is_reassoc_req(fc))) {
3306 if (status_acked) {
3307 ifmgd->assoc_data->timeout =
3308 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
8d61ffa5 3309 run_again(sdata, ifmgd->assoc_data->timeout);
1672c0e3
JB		 3310 } else {
3311 ifmgd->assoc_data->timeout = jiffies - 1;
3312 }
89afe614 3313 ifmgd->assoc_data->timeout_started = true;
1672c0e3
JB		 3314 }
3315 }
3316
89afe614 3317 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
66e67e41
JB		 3318 time_after(jiffies, ifmgd->auth_data->timeout)) {
3319 if (ifmgd->auth_data->done) {
3320 /*
3321 * ok ... we waited for assoc but userspace didn't,
3322 * so let's just kill the auth data
3323 */
3324 ieee80211_destroy_auth_data(sdata, false);
3325 } else if (ieee80211_probe_auth(sdata)) {
3326 u8 bssid[ETH_ALEN];
3327
3328 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3329
3330 ieee80211_destroy_auth_data(sdata, false);
3331
6ff57cf8 3332 cfg80211_auth_timeout(sdata->dev, bssid);
66e67e41 3333 }
89afe614 3334 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
8d61ffa5 3335 run_again(sdata, ifmgd->auth_data->timeout);
66e67e41 3336
89afe614 3337 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
66e67e41 3338 time_after(jiffies, ifmgd->assoc_data->timeout)) {
989c6505 3339 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
66e67e41 3340 ieee80211_do_assoc(sdata)) {
959867fa 3341 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
66e67e41
JB		 3342
3343 ieee80211_destroy_assoc_data(sdata, false);
959867fa 3344 cfg80211_assoc_timeout(sdata->dev, bss);
66e67e41 3345 }
89afe614 3346 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
8d61ffa5 3347 run_again(sdata, ifmgd->assoc_data->timeout);
66e67e41 3348
392b9ffb 3349 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
b291ba11 3350 ifmgd->associated) {
a43abf29 3351 u8 bssid[ETH_ALEN];
72a8a3ed 3352 int max_tries;
a43abf29 3353
0c1ad2ca 3354 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 3355
72a8a3ed 3356 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
180205bd 3357 max_tries = max_nullfunc_tries;
72a8a3ed 3358 else
180205bd 3359 max_tries = max_probe_tries;
72a8a3ed 3360
4e5ff376
FF		 3361 /* ACK received for nullfunc probing frame */
3362 if (!ifmgd->probe_send_count)
3363 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 3364 else if (ifmgd->nullfunc_failed) {
3365 if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3366 mlme_dbg(sdata,
3367 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3368 bssid, ifmgd->probe_send_count,
3369 max_tries);
04ac3c0e
FF		 3370 ieee80211_mgd_probe_ap_send(sdata);
3371 } else {
bdcbd8e0
JB		 3372 mlme_dbg(sdata,
3373 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3374 bssid);
95acac61 3375 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1
JB		 3376 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3377 false);
04ac3c0e
FF		 3378 }
3379 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
8d61ffa5 3380 run_again(sdata, ifmgd->probe_timeout);
04ac3c0e 3381 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
bdcbd8e0
JB		 3382 mlme_dbg(sdata,
3383 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3384 bssid, probe_wait_ms);
95acac61 3385 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 3386 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
04ac3c0e 3387 } else if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3388 mlme_dbg(sdata,
3389 "No probe response from AP %pM after %dms, try %d/%i\n",
3390 bssid, probe_wait_ms,
3391 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 3392 ieee80211_mgd_probe_ap_send(sdata);
3393 } else {
b291ba11
JB		 3394 /*
3395 * We actually lost the connection ... or did we?
3396 * Let's make sure!
3397 */
b38afa87
BG		 3398 wiphy_debug(local->hw.wiphy,
3399 "%s: No probe response from AP %pM"
3400 " after %dms, disconnecting.\n",
3401 sdata->name,
180205bd 3402 bssid, probe_wait_ms);
04ac3c0e 3403
95acac61 3404 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 3405 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
b291ba11
JB		 3406 }
3407 }
3408
8d61ffa5 3409 sdata_unlock(sdata);
f0706e82
JB		 3410}
3411
b291ba11
JB		 3412static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3413{
3414 struct ieee80211_sub_if_data *sdata =
3415 (struct ieee80211_sub_if_data *) data;
3416 struct ieee80211_local *local = sdata->local;
3417
3418 if (local->quiescing)
3419 return;
3420
682bd38b 3421 sdata->u.mgd.connection_loss = false;
1e4dcd01
JO		 3422 ieee80211_queue_work(&sdata->local->hw,
3423 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 3424}
3425
3426static void ieee80211_sta_conn_mon_timer(unsigned long data)
3427{
3428 struct ieee80211_sub_if_data *sdata =
3429 (struct ieee80211_sub_if_data *) data;
3430 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3431 struct ieee80211_local *local = sdata->local;
3432
3433 if (local->quiescing)
3434 return;
3435
42935eca 3436 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 3437}
3438
3439static void ieee80211_sta_monitor_work(struct work_struct *work)
3440{
3441 struct ieee80211_sub_if_data *sdata =
3442 container_of(work, struct ieee80211_sub_if_data,
3443 u.mgd.monitor_work);
3444
3445 ieee80211_mgd_probe_ap(sdata, false);
3446}
3447
9c6bd790
JB		 3448static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3449{
494f1fe5
EP		 3450 u32 flags;
3451
ad935687 3452 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
925e64c3 3453 __ieee80211_stop_poll(sdata);
ad935687 3454
b291ba11 3455 /* let's probe the connection once */
494f1fe5
EP		 3456 flags = sdata->local->hw.flags;
3457 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3458 ieee80211_queue_work(&sdata->local->hw,
3459 &sdata->u.mgd.monitor_work);
b291ba11 3460 /* and do all the other regular work too */
64592c8f 3461 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 3462 }
9c6bd790 3463}
f0706e82 3464
b8360ab8
JB		 3465#ifdef CONFIG_PM
3466void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
3467{
3468 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3469
8d61ffa5 3470 sdata_lock(sdata);
b8360ab8 3471 if (!ifmgd->associated) {
8d61ffa5 3472 sdata_unlock(sdata);
b8360ab8
JB		 3473 return;
3474 }
3475
3476 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
3477 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
3478 mlme_dbg(sdata, "driver requested disconnect after resume\n");
3479 ieee80211_sta_connection_lost(sdata,
3480 ifmgd->associated->bssid,
3481 WLAN_REASON_UNSPECIFIED,
3482 true);
8d61ffa5 3483 sdata_unlock(sdata);
b8360ab8
JB		 3484 return;
3485 }
8d61ffa5 3486 sdata_unlock(sdata);
b8360ab8
JB		 3487}
3488#endif
3489
9c6bd790
JB		 3490/* interface setup */
3491void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 3492{
46900298 3493 struct ieee80211_if_managed *ifmgd;
988c0f72 3494
46900298 3495 ifmgd = &sdata->u.mgd;
b291ba11 3496 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 3497 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 3498 INIT_WORK(&ifmgd->beacon_connection_loss_work,
3499 ieee80211_beacon_connection_loss_work);
882a7c69
JB		 3500 INIT_WORK(&ifmgd->csa_connection_drop_work,
3501 ieee80211_csa_connection_drop_work);
d1f5b7a3 3502 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
46900298 3503 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 3504 (unsigned long) sdata);
b291ba11
JB		 3505 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
3506 (unsigned long) sdata);
3507 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
3508 (unsigned long) sdata);
46900298 3509 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 3510 (unsigned long) sdata);
9c6bd790 3511
ab1faead 3512 ifmgd->flags = 0;
1478acb3 3513 ifmgd->powersave = sdata->wdev.ps;
219c3867
AB		 3514 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
3515 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
67baf663 3516 ifmgd->p2p_noa_index = -1;
bbbdff9e 3517
0f78231b
JB		 3518 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
3519 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
3520 else
3521 ifmgd->req_smps = IEEE80211_SMPS_OFF;
f0706e82
JB		 3522}
3523
77fdaa12
JB		 3524/* scan finished notification */
3525void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 3526{
31ee67a1 3527 struct ieee80211_sub_if_data *sdata;
60f8b39c 3528
77fdaa12
JB		 3529 /* Restart STA timers */
3530 rcu_read_lock();
370bd005
BG		 3531 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3532 if (ieee80211_sdata_running(sdata))
3533 ieee80211_restart_sta_timer(sdata);
3534 }
77fdaa12
JB		 3535 rcu_read_unlock();
3536}
60f8b39c 3537
77fdaa12
JB		 3538int ieee80211_max_network_latency(struct notifier_block *nb,
3539 unsigned long data, void *dummy)
3540{
3541 s32 latency_usec = (s32) data;
3542 struct ieee80211_local *local =
3543 container_of(nb, struct ieee80211_local,
3544 network_latency_notifier);
1fa6f4af 3545
77fdaa12
JB		 3546 mutex_lock(&local->iflist_mtx);
3547 ieee80211_recalc_ps(local, latency_usec);
3548 mutex_unlock(&local->iflist_mtx);
dfe67012 3549
77fdaa12 3550 return 0;
9c6bd790
JB		 3551}
3552
f2d9d270
JB		 3553static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
3554 struct cfg80211_bss *cbss)
3555{
3556 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3557 const u8 *ht_cap_ie, *vht_cap_ie;
3558 const struct ieee80211_ht_cap *ht_cap;
3559 const struct ieee80211_vht_cap *vht_cap;
3560 u8 chains = 1;
3561
3562 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
3563 return chains;
3564
9caf0364 3565 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
f2d9d270
JB		 3566 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
3567 ht_cap = (void *)(ht_cap_ie + 2);
3568 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
3569 /*
3570 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
3571 * "Tx Unequal Modulation Supported" fields.
3572 */
3573 }
3574
3575 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
3576 return chains;
3577
9caf0364 3578 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
f2d9d270
JB		 3579 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
3580 u8 nss;
3581 u16 tx_mcs_map;
3582
3583 vht_cap = (void *)(vht_cap_ie + 2);
3584 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
3585 for (nss = 8; nss > 0; nss--) {
3586 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
3587 IEEE80211_VHT_MCS_NOT_SUPPORTED)
3588 break;
3589 }
3590 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
3591 chains = max(chains, nss);
3592 }
3593
3594 return chains;
3595}
3596
b17166a7
JB		 3597static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
3598 struct cfg80211_bss *cbss)
a1cf775d
JB		 3599{
3600 struct ieee80211_local *local = sdata->local;
3601 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
24398e39 3602 const struct ieee80211_ht_operation *ht_oper = NULL;
f2d9d270 3603 const struct ieee80211_vht_operation *vht_oper = NULL;
24398e39 3604 struct ieee80211_supported_band *sband;
4bf88530 3605 struct cfg80211_chan_def chandef;
f2d9d270 3606 int ret;
a1cf775d 3607
24398e39
JB		 3608 sband = local->hw.wiphy->bands[cbss->channel->band];
3609
f2d9d270
JB		 3610 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
3611 IEEE80211_STA_DISABLE_80P80MHZ |
3612 IEEE80211_STA_DISABLE_160MHZ);
3613
9caf0364
JB		 3614 rcu_read_lock();
3615
f2d9d270
JB		 3616 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3617 sband->ht_cap.ht_supported) {
08e6effa 3618 const u8 *ht_oper_ie, *ht_cap;
24398e39 3619
9caf0364 3620 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
24398e39
JB		 3621 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3622 ht_oper = (void *)(ht_oper_ie + 2);
08e6effa
JB		 3623
3624 ht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
3625 if (!ht_cap || ht_cap[1] < sizeof(struct ieee80211_ht_cap)) {
3626 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3627 ht_oper = NULL;
3628 }
24398e39
JB		 3629 }
3630
f2d9d270
JB		 3631 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3632 sband->vht_cap.vht_supported) {
08e6effa 3633 const u8 *vht_oper_ie, *vht_cap;
f2d9d270 3634
9caf0364
JB		 3635 vht_oper_ie = ieee80211_bss_get_ie(cbss,
3636 WLAN_EID_VHT_OPERATION);
f2d9d270
JB		 3637 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
3638 vht_oper = (void *)(vht_oper_ie + 2);
3639 if (vht_oper && !ht_oper) {
3640 vht_oper = NULL;
bdcbd8e0 3641 sdata_info(sdata,
f2d9d270 3642 "AP advertised VHT without HT, disabling both\n");
cb145022
JB		 3643 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3644 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
24398e39 3645 }
08e6effa
JB		 3646
3647 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
3648 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
3649 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3650 vht_oper = NULL;
3651 }
24398e39
JB		 3652 }
3653
f2d9d270
JB		 3654 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
3655 cbss->channel,
3656 ht_oper, vht_oper,
5cdaed1e 3657 &chandef, false);
04ecd257 3658
f2d9d270
JB		 3659 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
3660 local->rx_chains);
24398e39 3661
9caf0364
JB		 3662 rcu_read_unlock();
3663
04ecd257
JB		 3664 /* will change later if needed */
3665 sdata->smps_mode = IEEE80211_SMPS_OFF;
3666
f2d9d270
JB		 3667 /*
3668 * If this fails (possibly due to channel context sharing
3669 * on incompatible channels, e.g. 80+80 and 160 sharing the
3670 * same control channel) try to use a smaller bandwidth.
3671 */
3672 ret = ieee80211_vif_use_channel(sdata, &chandef,
3673 IEEE80211_CHANCTX_SHARED);
0418a445
SW		 3674
3675 /* don't downgrade for 5 and 10 MHz channels, though. */
3676 if (chandef.width == NL80211_CHAN_WIDTH_5 ||
3677 chandef.width == NL80211_CHAN_WIDTH_10)
3678 return ret;
3679
d601cd8d 3680 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
e6b7cde4 3681 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
d601cd8d
JB		 3682 ret = ieee80211_vif_use_channel(sdata, &chandef,
3683 IEEE80211_CHANCTX_SHARED);
3684 }
f2d9d270 3685 return ret;
b17166a7
JB		 3686}
3687
3688static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
3689 struct cfg80211_bss *cbss, bool assoc)
3690{
3691 struct ieee80211_local *local = sdata->local;
3692 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3693 struct ieee80211_bss *bss = (void *)cbss->priv;
3694 struct sta_info *new_sta = NULL;
3695 bool have_sta = false;
3696 int err;
3697
3698 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3699 return -EINVAL;
3700
3701 if (assoc) {
3702 rcu_read_lock();
3703 have_sta = sta_info_get(sdata, cbss->bssid);
3704 rcu_read_unlock();
3705 }
3706
3707 if (!have_sta) {
3708 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
3709 if (!new_sta)
3710 return -ENOMEM;
3711 }
13e0c8e3 3712 if (new_sta) {
5d6a1b06
JB		 3713 u32 rates = 0, basic_rates = 0;
3714 bool have_higher_than_11mbit;
3715 int min_rate = INT_MAX, min_rate_index = -1;
2103dec1 3716 struct ieee80211_chanctx_conf *chanctx_conf;
b17166a7 3717 struct ieee80211_supported_band *sband;
8cef2c9d 3718 const struct cfg80211_bss_ies *ies;
2103dec1
SW		 3719 int shift;
3720 u32 rate_flags;
b17166a7
JB		 3721
3722 sband = local->hw.wiphy->bands[cbss->channel->band];
3723
3724 err = ieee80211_prep_channel(sdata, cbss);
3725 if (err) {
3726 sta_info_free(local, new_sta);
2103dec1 3727 return -EINVAL;
b17166a7 3728 }
2103dec1
SW		 3729 shift = ieee80211_vif_get_shift(&sdata->vif);
3730
3731 rcu_read_lock();
3732 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3733 if (WARN_ON(!chanctx_conf)) {
3734 rcu_read_unlock();
3735 return -EINVAL;
3736 }
3737 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
3738 rcu_read_unlock();
5d6a1b06 3739
5d6a1b06
JB		 3740 ieee80211_get_rates(sband, bss->supp_rates,
3741 bss->supp_rates_len,
3742 &rates, &basic_rates,
3743 &have_higher_than_11mbit,
2103dec1
SW		 3744 &min_rate, &min_rate_index,
3745 shift, rate_flags);
5d6a1b06
JB		 3746
3747 /*
3748 * This used to be a workaround for basic rates missing
3749 * in the association response frame. Now that we no
3750 * longer use the basic rates from there, it probably
3751 * doesn't happen any more, but keep the workaround so
3752 * in case some *other* APs are buggy in different ways
3753 * we can connect -- with a warning.
3754 */
3755 if (!basic_rates && min_rate_index >= 0) {
bdcbd8e0
JB		 3756 sdata_info(sdata,
3757 "No basic rates, using min rate instead\n");
5d6a1b06
JB		 3758 basic_rates = BIT(min_rate_index);
3759 }
3760
13e0c8e3 3761 new_sta->sta.supp_rates[cbss->channel->band] = rates;
5d6a1b06
JB		 3762 sdata->vif.bss_conf.basic_rates = basic_rates;
3763
3764 /* cf. IEEE 802.11 9.2.12 */
55de908a 3765 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
5d6a1b06
JB		 3766 have_higher_than_11mbit)
3767 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3768 else
3769 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
3770
3771 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
3772
8c358bcd
JB		 3773 /* set timing information */
3774 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
8cef2c9d 3775 rcu_read_lock();
ef429dad
JB		 3776 ies = rcu_dereference(cbss->beacon_ies);
3777 if (ies) {
3778 const u8 *tim_ie;
3779
3780 sdata->vif.bss_conf.sync_tsf = ies->tsf;
3781 sdata->vif.bss_conf.sync_device_ts =
3782 bss->device_ts_beacon;
3783 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
3784 ies->data, ies->len);
3785 if (tim_ie && tim_ie[1] >= 2)
3786 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
3787 else
3788 sdata->vif.bss_conf.sync_dtim_count = 0;
3789 } else if (!(local->hw.flags &
3790 IEEE80211_HW_TIMING_BEACON_ONLY)) {
3791 ies = rcu_dereference(cbss->proberesp_ies);
3792 /* must be non-NULL since beacon IEs were NULL */
3793 sdata->vif.bss_conf.sync_tsf = ies->tsf;
3794 sdata->vif.bss_conf.sync_device_ts =
3795 bss->device_ts_presp;
3796 sdata->vif.bss_conf.sync_dtim_count = 0;
3797 } else {
3798 sdata->vif.bss_conf.sync_tsf = 0;
3799 sdata->vif.bss_conf.sync_device_ts = 0;
3800 sdata->vif.bss_conf.sync_dtim_count = 0;
3801 }
8cef2c9d 3802 rcu_read_unlock();
8c358bcd
JB		 3803
3804 /* tell driver about BSSID, basic rates and timing */
5d6a1b06 3805 ieee80211_bss_info_change_notify(sdata,
8c358bcd
JB		 3806 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
3807 BSS_CHANGED_BEACON_INT);
a1cf775d
JB		 3808
3809 if (assoc)
13e0c8e3 3810 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
a1cf775d 3811
13e0c8e3
JB		 3812 err = sta_info_insert(new_sta);
3813 new_sta = NULL;
a1cf775d 3814 if (err) {
bdcbd8e0
JB		 3815 sdata_info(sdata,
3816 "failed to insert STA entry for the AP (error %d)\n",
3817 err);
a1cf775d
JB		 3818 return err;
3819 }
3820 } else
b203ca39 3821 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
a1cf775d
JB		 3822
3823 return 0;
3824}
3825
77fdaa12
JB		 3826/* config hooks */
3827int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
3828 struct cfg80211_auth_request *req)
9c6bd790 3829{
66e67e41
JB		 3830 struct ieee80211_local *local = sdata->local;
3831 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3832 struct ieee80211_mgd_auth_data *auth_data;
77fdaa12 3833 u16 auth_alg;
66e67e41
JB		 3834 int err;
3835
3836 /* prepare auth data structure */
9c6bd790 3837
77fdaa12
JB		 3838 switch (req->auth_type) {
3839 case NL80211_AUTHTYPE_OPEN_SYSTEM:
3840 auth_alg = WLAN_AUTH_OPEN;
3841 break;
3842 case NL80211_AUTHTYPE_SHARED_KEY:
66e67e41 3843 if (IS_ERR(local->wep_tx_tfm))
9dca9c49 3844 return -EOPNOTSUPP;
77fdaa12
JB		 3845 auth_alg = WLAN_AUTH_SHARED_KEY;
3846 break;
3847 case NL80211_AUTHTYPE_FT:
3848 auth_alg = WLAN_AUTH_FT;
3849 break;
3850 case NL80211_AUTHTYPE_NETWORK_EAP:
3851 auth_alg = WLAN_AUTH_LEAP;
3852 break;
6b8ece3a
JM		 3853 case NL80211_AUTHTYPE_SAE:
3854 auth_alg = WLAN_AUTH_SAE;
3855 break;
77fdaa12
JB		 3856 default:
3857 return -EOPNOTSUPP;
60f8b39c 3858 }
77fdaa12 3859
6b8ece3a
JM		 3860 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
3861 req->ie_len, GFP_KERNEL);
66e67e41 3862 if (!auth_data)
9c6bd790 3863 return -ENOMEM;
77fdaa12 3864
66e67e41 3865 auth_data->bss = req->bss;
77fdaa12 3866
6b8ece3a
JM		 3867 if (req->sae_data_len >= 4) {
3868 __le16 *pos = (__le16 *) req->sae_data;
3869 auth_data->sae_trans = le16_to_cpu(pos[0]);
3870 auth_data->sae_status = le16_to_cpu(pos[1]);
3871 memcpy(auth_data->data, req->sae_data + 4,
3872 req->sae_data_len - 4);
3873 auth_data->data_len += req->sae_data_len - 4;
3874 }
3875
77fdaa12 3876 if (req->ie && req->ie_len) {
6b8ece3a
JM		 3877 memcpy(&auth_data->data[auth_data->data_len],
3878 req->ie, req->ie_len);
3879 auth_data->data_len += req->ie_len;
9c6bd790 3880 }
77fdaa12 3881
fffd0934 3882 if (req->key && req->key_len) {
66e67e41
JB		 3883 auth_data->key_len = req->key_len;
3884 auth_data->key_idx = req->key_idx;
3885 memcpy(auth_data->key, req->key, req->key_len);
fffd0934
JB		 3886 }
3887
66e67e41 3888 auth_data->algorithm = auth_alg;
60f8b39c 3889
66e67e41 3890 /* try to authenticate/probe */
2a33bee2 3891
66e67e41
JB		 3892 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
3893 ifmgd->assoc_data) {
3894 err = -EBUSY;
3895 goto err_free;
2a33bee2
GE		 3896 }
3897
66e67e41
JB		 3898 if (ifmgd->auth_data)
3899 ieee80211_destroy_auth_data(sdata, false);
2a33bee2 3900
66e67e41
JB		 3901 /* prep auth_data so we don't go into idle on disassoc */
3902 ifmgd->auth_data = auth_data;
af6b6374 3903
7b119dc0
JB		 3904 if (ifmgd->associated) {
3905 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3906
3907 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3908 WLAN_REASON_UNSPECIFIED,
3909 false, frame_buf);
3910
6ff57cf8
JB		 3911 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3912 sizeof(frame_buf));
7b119dc0 3913 }
af6b6374 3914
bdcbd8e0 3915 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
e5b900d2 3916
a1cf775d
JB		 3917 err = ieee80211_prep_connection(sdata, req->bss, false);
3918 if (err)
66e67e41 3919 goto err_clear;
af6b6374 3920
66e67e41
JB		 3921 err = ieee80211_probe_auth(sdata);
3922 if (err) {
66e67e41
JB		 3923 sta_info_destroy_addr(sdata, req->bss->bssid);
3924 goto err_clear;
3925 }
3926
3927 /* hold our own reference */
5b112d3d 3928 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
8d61ffa5 3929 return 0;
66e67e41
JB		 3930
3931 err_clear:
3d2abdfd
EP		 3932 memset(ifmgd->bssid, 0, ETH_ALEN);
3933 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 3934 ifmgd->auth_data = NULL;
3935 err_free:
3936 kfree(auth_data);
66e67e41 3937 return err;
af6b6374
JB		 3938}
3939
77fdaa12
JB		 3940int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
3941 struct cfg80211_assoc_request *req)
f0706e82 3942{
66e67e41 3943 struct ieee80211_local *local = sdata->local;
77fdaa12 3944 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 3945 struct ieee80211_bss *bss = (void *)req->bss->priv;
66e67e41 3946 struct ieee80211_mgd_assoc_data *assoc_data;
c65dd147 3947 const struct cfg80211_bss_ies *beacon_ies;
4e74bfdb 3948 struct ieee80211_supported_band *sband;
b08fbbd8 3949 const u8 *ssidie, *ht_ie, *vht_ie;
2a33bee2 3950 int i, err;
f0706e82 3951
66e67e41
JB		 3952 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
3953 if (!assoc_data)
3954 return -ENOMEM;
3955
9caf0364
JB		 3956 rcu_read_lock();
3957 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
3958 if (!ssidie) {
3959 rcu_read_unlock();
3960 kfree(assoc_data);
3961 return -EINVAL;
3962 }
3963 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
3964 assoc_data->ssid_len = ssidie[1];
3965 rcu_read_unlock();
3966
7b119dc0
JB		 3967 if (ifmgd->associated) {
3968 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3969
3970 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3971 WLAN_REASON_UNSPECIFIED,
3972 false, frame_buf);
3973
6ff57cf8
JB		 3974 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3975 sizeof(frame_buf));
7b119dc0 3976 }
66e67e41
JB		 3977
3978 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
3979 err = -EBUSY;
3980 goto err_free;
af6b6374 3981 }
77fdaa12 3982
66e67e41
JB		 3983 if (ifmgd->assoc_data) {
3984 err = -EBUSY;
3985 goto err_free;
3986 }
77fdaa12 3987
66e67e41
JB		 3988 if (ifmgd->auth_data) {
3989 bool match;
3990
3991 /* keep sta info, bssid if matching */
b203ca39 3992 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
66e67e41 3993 ieee80211_destroy_auth_data(sdata, match);
2a33bee2
GE		 3994 }
3995
66e67e41 3996 /* prepare assoc data */
19c3b830 3997
d8ec4433
JO		 3998 ifmgd->beacon_crc_valid = false;
3999
de5036aa
JB		 4000 /*
4001 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4002 * We still associate in non-HT mode (11a/b/g) if any one of these
4003 * ciphers is configured as pairwise.
4004 * We can set this to true for non-11n hardware, that'll be checked
4005 * separately along with the peer capabilities.
4006 */
1c4cb928 4007 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
77fdaa12
JB		 4008 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4009 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
1c4cb928 4010 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
a8243b72 4011 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
d545daba 4012 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
1c4cb928 4013 netdev_info(sdata->dev,
d545daba 4014 "disabling HT/VHT due to WEP/TKIP use\n");
1c4cb928
JB		 4015 }
4016 }
77fdaa12 4017
d545daba 4018 if (req->flags & ASSOC_REQ_DISABLE_HT) {
a8243b72 4019 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
d545daba
MP		 4020 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4021 }
ef96a842 4022
dd5ecfea
JB		 4023 if (req->flags & ASSOC_REQ_DISABLE_VHT)
4024 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4025
4e74bfdb
JB		 4026 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4027 sband = local->hw.wiphy->bands[req->bss->channel->band];
4028 if (!sband->ht_cap.ht_supported ||
1c4cb928 4029 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
a8243b72 4030 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
1b49de26
JB		 4031 if (!bss->wmm_used)
4032 netdev_info(sdata->dev,
4033 "disabling HT as WMM/QoS is not supported by the AP\n");
1c4cb928 4034 }
4e74bfdb 4035
d545daba
MP		 4036 /* disable VHT if we don't support it or the AP doesn't use WMM */
4037 if (!sband->vht_cap.vht_supported ||
4038 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
4039 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
1b49de26
JB		 4040 if (!bss->wmm_used)
4041 netdev_info(sdata->dev,
4042 "disabling VHT as WMM/QoS is not supported by the AP\n");
d545daba
MP		 4043 }
4044
ef96a842
BG		 4045 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4046 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4047 sizeof(ifmgd->ht_capa_mask));
4048
dd5ecfea
JB		 4049 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4050 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4051 sizeof(ifmgd->vht_capa_mask));
4052
77fdaa12 4053 if (req->ie && req->ie_len) {
66e67e41
JB		 4054 memcpy(assoc_data->ie, req->ie, req->ie_len);
4055 assoc_data->ie_len = req->ie_len;
4056 }
f679f65d 4057
66e67e41 4058 assoc_data->bss = req->bss;
f679f65d 4059
af6b6374
JB		 4060 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4061 if (ifmgd->powersave)
04ecd257 4062 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
af6b6374 4063 else
04ecd257 4064 sdata->smps_mode = IEEE80211_SMPS_OFF;
af6b6374 4065 } else
04ecd257 4066 sdata->smps_mode = ifmgd->req_smps;
af6b6374 4067
66e67e41 4068 assoc_data->capability = req->bss->capability;
32c5057b
JB		 4069 assoc_data->wmm = bss->wmm_used &&
4070 (local->hw.queues >= IEEE80211_NUM_ACS);
66e67e41
JB		 4071 assoc_data->supp_rates = bss->supp_rates;
4072 assoc_data->supp_rates_len = bss->supp_rates_len;
9dde6423 4073
9caf0364 4074 rcu_read_lock();
9dde6423
JB		 4075 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4076 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4077 assoc_data->ap_ht_param =
4078 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4079 else
a8243b72 4080 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
b08fbbd8
JB		 4081 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4082 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4083 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4084 sizeof(struct ieee80211_vht_cap));
4085 else
4086 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
9caf0364 4087 rcu_read_unlock();
63f170e0 4088
ab13315a 4089 if (bss->wmm_used && bss->uapsd_supported &&
24aa11ab
AB		 4090 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD) &&
4091 sdata->wmm_acm != 0xff) {
76f0303d 4092 assoc_data->uapsd = true;
ab13315a
KV		 4093 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4094 } else {
76f0303d 4095 assoc_data->uapsd = false;
ab13315a
KV		 4096 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4097 }
4098
77fdaa12 4099 if (req->prev_bssid)
66e67e41 4100 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12
JB		 4101
4102 if (req->use_mfp) {
4103 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4104 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4105 } else {
4106 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4107 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4108 }
4109
4110 if (req->crypto.control_port)
4111 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4112 else
4113 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4114
a621fa4d
JB		 4115 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4116 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4117
66e67e41
JB		 4118 /* kick off associate process */
4119
4120 ifmgd->assoc_data = assoc_data;
826262c3 4121 ifmgd->dtim_period = 0;
989c6505 4122 ifmgd->have_beacon = false;
66e67e41 4123
a1cf775d
JB		 4124 err = ieee80211_prep_connection(sdata, req->bss, true);
4125 if (err)
4126 goto err_clear;
66e67e41 4127
c65dd147
EG		 4128 rcu_read_lock();
4129 beacon_ies = rcu_dereference(req->bss->beacon_ies);
826262c3 4130
c65dd147
EG		 4131 if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC &&
4132 !beacon_ies) {
4133 /*
4134 * Wait up to one beacon interval ...
4135 * should this be more if we miss one?
4136 */
4137 sdata_info(sdata, "waiting for beacon from %pM\n",
4138 ifmgd->bssid);
4139 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
89afe614 4140 assoc_data->timeout_started = true;
c65dd147
EG		 4141 assoc_data->need_beacon = true;
4142 } else if (beacon_ies) {
4143 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4144 beacon_ies->data,
4145 beacon_ies->len);
ef429dad
JB		 4146 u8 dtim_count = 0;
4147
c65dd147
EG		 4148 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4149 const struct ieee80211_tim_ie *tim;
4150 tim = (void *)(tim_ie + 2);
4151 ifmgd->dtim_period = tim->dtim_period;
ef429dad 4152 dtim_count = tim->dtim_count;
826262c3 4153 }
989c6505 4154 ifmgd->have_beacon = true;
66e67e41 4155 assoc_data->timeout = jiffies;
89afe614 4156 assoc_data->timeout_started = true;
ef429dad
JB		 4157
4158 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
4159 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4160 sdata->vif.bss_conf.sync_device_ts =
4161 bss->device_ts_beacon;
4162 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4163 }
c65dd147
EG		 4164 } else {
4165 assoc_data->timeout = jiffies;
89afe614 4166 assoc_data->timeout_started = true;
66e67e41 4167 }
c65dd147
EG		 4168 rcu_read_unlock();
4169
8d61ffa5 4170 run_again(sdata, assoc_data->timeout);
66e67e41 4171
fcff4f10
PS		 4172 if (bss->corrupt_data) {
4173 char *corrupt_type = "data";
4174 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4175 if (bss->corrupt_data &
4176 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4177 corrupt_type = "beacon and probe response";
4178 else
4179 corrupt_type = "beacon";
4180 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4181 corrupt_type = "probe response";
bdcbd8e0
JB		 4182 sdata_info(sdata, "associating with AP with corrupt %s\n",
4183 corrupt_type);
fcff4f10
PS		 4184 }
4185
8d61ffa5 4186 return 0;
66e67e41 4187 err_clear:
3d2abdfd
EP		 4188 memset(ifmgd->bssid, 0, ETH_ALEN);
4189 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 4190 ifmgd->assoc_data = NULL;
4191 err_free:
4192 kfree(assoc_data);
66e67e41 4193 return err;
f0706e82
JB		 4194}
4195
77fdaa12 4196int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
63c9c5e7 4197 struct cfg80211_deauth_request *req)
f0706e82 4198{
46900298 4199 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 4200 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
6863255b 4201 bool tx = !req->local_state_change;
de3d43a3 4202 bool report_frame = false;
f0706e82 4203
bdcbd8e0
JB		 4204 sdata_info(sdata,
4205 "deauthenticating from %pM by local choice (reason=%d)\n",
4206 req->bssid, req->reason_code);
0ff71613 4207
86552017 4208 if (ifmgd->auth_data) {
8c7d857c 4209 drv_mgd_prepare_tx(sdata->local, sdata);
37ad3888
JB		 4210 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4211 IEEE80211_STYPE_DEAUTH,
6863255b 4212 req->reason_code, tx,
37ad3888 4213 frame_buf);
86552017 4214 ieee80211_destroy_auth_data(sdata, false);
86552017 4215
de3d43a3 4216 report_frame = true;
86552017 4217 goto out;
8c7d857c
EG		 4218 }
4219
86552017
JB		 4220 if (ifmgd->associated &&
4221 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
4222 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4223 req->reason_code, tx, frame_buf);
de3d43a3 4224 report_frame = true;
86552017 4225 }
37ad3888 4226
86552017 4227 out:
de3d43a3 4228 if (report_frame)
6ff57cf8
JB		 4229 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4230 IEEE80211_DEAUTH_FRAME_LEN);
86552017 4231
f0706e82
JB		 4232 return 0;
4233}
84363e6e 4234
77fdaa12 4235int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 4236 struct cfg80211_disassoc_request *req)
9c6bd790 4237{
77fdaa12 4238 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 4239 u8 bssid[ETH_ALEN];
6ae16775 4240 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
9c6bd790 4241
8d8b261a
JB		 4242 /*
4243 * cfg80211 should catch this ... but it's racy since
4244 * we can receive a disassoc frame, process it, hand it
4245 * to cfg80211 while that's in a locked section already
4246 * trying to tell us that the user wants to disconnect.
4247 */
8d61ffa5 4248 if (ifmgd->associated != req->bss)
77fdaa12 4249 return -ENOLINK;
77fdaa12 4250
bdcbd8e0
JB		 4251 sdata_info(sdata,
4252 "disassociating from %pM by local choice (reason=%d)\n",
4253 req->bss->bssid, req->reason_code);
0ff71613 4254
e69e95db 4255 memcpy(bssid, req->bss->bssid, ETH_ALEN);
37ad3888
JB		 4256 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4257 req->reason_code, !req->local_state_change,
4258 frame_buf);
10f644a4 4259
6ff57cf8
JB		 4260 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4261 IEEE80211_DEAUTH_FRAME_LEN);
bc83b681 4262
10f644a4
JB		 4263 return 0;
4264}
026331c4 4265
afa762f6 4266void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
54e4ffb2
JB		 4267{
4268 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4269
49921859
BG		 4270 /*
4271 * Make sure some work items will not run after this,
4272 * they will not do anything but might not have been
4273 * cancelled when disconnecting.
4274 */
4275 cancel_work_sync(&ifmgd->monitor_work);
4276 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
4277 cancel_work_sync(&ifmgd->request_smps_work);
4278 cancel_work_sync(&ifmgd->csa_connection_drop_work);
4279 cancel_work_sync(&ifmgd->chswitch_work);
4280
8d61ffa5 4281 sdata_lock(sdata);
959867fa
JB		 4282 if (ifmgd->assoc_data) {
4283 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
54e4ffb2 4284 ieee80211_destroy_assoc_data(sdata, false);
959867fa
JB		 4285 cfg80211_assoc_timeout(sdata->dev, bss);
4286 }
54e4ffb2
JB		 4287 if (ifmgd->auth_data)
4288 ieee80211_destroy_auth_data(sdata, false);
4289 del_timer_sync(&ifmgd->timer);
8d61ffa5 4290 sdata_unlock(sdata);
54e4ffb2
JB		 4291}
4292
a97c13c3
JO		 4293void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
4294 enum nl80211_cqm_rssi_threshold_event rssi_event,
4295 gfp_t gfp)
4296{
4297 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4298
b5878a2d
JB		 4299 trace_api_cqm_rssi_notify(sdata, rssi_event);
4300
a97c13c3
JO		 4301 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
4302}
4303EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
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