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mac80211: set TDLS capab to zero on failure frames
[mirror_ubuntu-bionic-kernel.git] / net / mac80211 / mlme.c
CommitLineData
f0706e82
JB		 1/*
2 * BSS client mode implementation
5394af4d 3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
f0706e82
JB		 4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
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
448cd2e2
EP		 134 ifmgd->probe_send_count = 0;
135
be099e82
LR		 136 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
137 return;
138
139 mod_timer(&sdata->u.mgd.conn_mon_timer,
140 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
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;
cb664981 225 vht_chandef.center_freq1 = chandef->center_freq1;
6565ec9b
JB		 226 break;
227 case IEEE80211_VHT_CHANWIDTH_80MHZ:
228 vht_chandef.width = NL80211_CHAN_WIDTH_80;
229 break;
230 case IEEE80211_VHT_CHANWIDTH_160MHZ:
231 vht_chandef.width = NL80211_CHAN_WIDTH_160;
232 break;
233 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
234 vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
6553bf04
JB		 235 vht_chandef.center_freq2 =
236 ieee80211_channel_to_frequency(
237 vht_oper->center_freq_seg2_idx,
238 channel->band);
6565ec9b
JB		 239 break;
240 default:
5cdaed1e 241 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
30eb1dc2
JB		 242 sdata_info(sdata,
243 "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
244 vht_oper->chan_width);
6565ec9b
JB		 245 ret = IEEE80211_STA_DISABLE_VHT;
246 goto out;
247 }
248
249 if (!cfg80211_chandef_valid(&vht_chandef)) {
5cdaed1e 250 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
30eb1dc2
JB		 251 sdata_info(sdata,
252 "AP VHT information is invalid, disable VHT\n");
6565ec9b
JB		 253 ret = IEEE80211_STA_DISABLE_VHT;
254 goto out;
255 }
256
257 if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
258 ret = 0;
259 goto out;
260 }
261
262 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
5cdaed1e 263 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
30eb1dc2
JB		 264 sdata_info(sdata,
265 "AP VHT information doesn't match HT, disable VHT\n");
6565ec9b
JB		 266 ret = IEEE80211_STA_DISABLE_VHT;
267 goto out;
268 }
269
270 *chandef = vht_chandef;
271
272 ret = 0;
273
274out:
963a1852
JB		 275 /*
276 * When tracking the current AP, don't do any further checks if the
277 * new chandef is identical to the one we're currently using for the
278 * connection. This keeps us from playing ping-pong with regulatory,
279 * without it the following can happen (for example):
280 * - connect to an AP with 80 MHz, world regdom allows 80 MHz
281 * - AP advertises regdom US
282 * - CRDA loads regdom US with 80 MHz prohibited (old database)
283 * - the code below detects an unsupported channel, downgrades, and
284 * we disconnect from the AP in the caller
285 * - disconnect causes CRDA to reload world regdomain and the game
286 * starts anew.
287 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
288 *
289 * It seems possible that there are still scenarios with CSA or real
290 * bandwidth changes where a this could happen, but those cases are
291 * less common and wouldn't completely prevent using the AP.
292 */
293 if (tracking &&
294 cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef))
295 return ret;
296
586e01ed
JB		 297 /* don't print the message below for VHT mismatch if VHT is disabled */
298 if (ret & IEEE80211_STA_DISABLE_VHT)
299 vht_chandef = *chandef;
300
ddfe49b4
JB		 301 /*
302 * Ignore the DISABLED flag when we're already connected and only
303 * tracking the APs beacon for bandwidth changes - otherwise we
304 * might get disconnected here if we connect to an AP, update our
305 * regulatory information based on the AP's country IE and the
306 * information we have is wrong/outdated and disables the channel
307 * that we're actually using for the connection to the AP.
308 */
6565ec9b 309 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
ddfe49b4
JB		 310 tracking ? 0 :
311 IEEE80211_CHAN_DISABLED)) {
6565ec9b
JB		 312 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
313 ret = IEEE80211_STA_DISABLE_HT |
314 IEEE80211_STA_DISABLE_VHT;
b56e4b85 315 break;
6565ec9b
JB		 316 }
317
e6b7cde4 318 ret |= ieee80211_chandef_downgrade(chandef);
6565ec9b
JB		 319 }
320
5cdaed1e 321 if (chandef->width != vht_chandef.width && !tracking)
6565ec9b
JB		 322 sdata_info(sdata,
323 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
324
325 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
326 return ret;
327}
328
30eb1dc2
JB		 329static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
330 struct sta_info *sta,
331 const struct ieee80211_ht_operation *ht_oper,
332 const struct ieee80211_vht_operation *vht_oper,
333 const u8 *bssid, u32 *changed)
d5522e03
JB		 334{
335 struct ieee80211_local *local = sdata->local;
30eb1dc2 336 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d5522e03 337 struct ieee80211_supported_band *sband;
55de908a 338 struct ieee80211_channel *chan;
30eb1dc2 339 struct cfg80211_chan_def chandef;
9ed6bcce 340 u16 ht_opmode;
30eb1dc2
JB		 341 u32 flags;
342 enum ieee80211_sta_rx_bandwidth new_sta_bw;
343 int ret;
d5522e03 344
30eb1dc2
JB		 345 /* if HT was/is disabled, don't track any bandwidth changes */
346 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
1128958d
JB		 347 return 0;
348
30eb1dc2
JB		 349 /* don't check VHT if we associated as non-VHT station */
350 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
351 vht_oper = NULL;
352
353 if (WARN_ON_ONCE(!sta))
354 return -EINVAL;
355
017b45bb
AA		 356 /*
357 * if bss configuration changed store the new one -
358 * this may be applicable even if channel is identical
359 */
360 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
361 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
362 *changed |= BSS_CHANGED_HT;
363 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
364 }
365
f2d9330e 366 chan = sdata->vif.bss_conf.chandef.chan;
55de908a 367 sband = local->hw.wiphy->bands[chan->band];
d5522e03 368
30eb1dc2
JB		 369 /* calculate new channel (type) based on HT/VHT operation IEs */
370 flags = ieee80211_determine_chantype(sdata, sband, chan, ht_oper,
5cdaed1e 371 vht_oper, &chandef, true);
30eb1dc2
JB		 372
373 /*
374 * Downgrade the new channel if we associated with restricted
375 * capabilities. For example, if we associated as a 20 MHz STA
376 * to a 40 MHz AP (due to regulatory, capabilities or config
377 * reasons) then switching to a 40 MHz channel now won't do us
378 * any good -- we couldn't use it with the AP.
379 */
380 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
381 chandef.width == NL80211_CHAN_WIDTH_80P80)
e6b7cde4 382 flags |= ieee80211_chandef_downgrade(&chandef);
30eb1dc2
JB		 383 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
384 chandef.width == NL80211_CHAN_WIDTH_160)
e6b7cde4 385 flags |= ieee80211_chandef_downgrade(&chandef);
30eb1dc2
JB		 386 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
387 chandef.width > NL80211_CHAN_WIDTH_20)
e6b7cde4 388 flags |= ieee80211_chandef_downgrade(&chandef);
30eb1dc2
JB		 389
390 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
391 return 0;
392
393 sdata_info(sdata,
394 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
395 ifmgd->bssid, chandef.chan->center_freq, chandef.width,
396 chandef.center_freq1, chandef.center_freq2);
397
398 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
399 IEEE80211_STA_DISABLE_VHT |
400 IEEE80211_STA_DISABLE_40MHZ |
401 IEEE80211_STA_DISABLE_80P80MHZ |
402 IEEE80211_STA_DISABLE_160MHZ)) ||
403 !cfg80211_chandef_valid(&chandef)) {
404 sdata_info(sdata,
405 "AP %pM changed bandwidth in a way we can't support - disconnect\n",
406 ifmgd->bssid);
407 return -EINVAL;
408 }
409
410 switch (chandef.width) {
411 case NL80211_CHAN_WIDTH_20_NOHT:
412 case NL80211_CHAN_WIDTH_20:
413 new_sta_bw = IEEE80211_STA_RX_BW_20;
414 break;
4bf88530 415 case NL80211_CHAN_WIDTH_40:
30eb1dc2 416 new_sta_bw = IEEE80211_STA_RX_BW_40;
64f68e5d 417 break;
30eb1dc2
JB		 418 case NL80211_CHAN_WIDTH_80:
419 new_sta_bw = IEEE80211_STA_RX_BW_80;
420 break;
421 case NL80211_CHAN_WIDTH_80P80:
422 case NL80211_CHAN_WIDTH_160:
423 new_sta_bw = IEEE80211_STA_RX_BW_160;
64f68e5d 424 break;
30eb1dc2
JB		 425 default:
426 return -EINVAL;
64f68e5d 427 }
d5522e03 428
30eb1dc2
JB		 429 if (new_sta_bw > sta->cur_max_bandwidth)
430 new_sta_bw = sta->cur_max_bandwidth;
64f68e5d 431
30eb1dc2
JB		 432 if (new_sta_bw < sta->sta.bandwidth) {
433 sta->sta.bandwidth = new_sta_bw;
434 rate_control_rate_update(local, sband, sta,
435 IEEE80211_RC_BW_CHANGED);
436 }
64f68e5d 437
30eb1dc2
JB		 438 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
439 if (ret) {
440 sdata_info(sdata,
441 "AP %pM changed bandwidth to incompatible one - disconnect\n",
442 ifmgd->bssid);
443 return ret;
444 }
7cc44ed4 445
30eb1dc2
JB		 446 if (new_sta_bw > sta->sta.bandwidth) {
447 sta->sta.bandwidth = new_sta_bw;
448 rate_control_rate_update(local, sband, sta,
449 IEEE80211_RC_BW_CHANGED);
0aaffa9b 450 }
d5522e03 451
30eb1dc2 452 return 0;
d5522e03
JB		 453}
454
9c6bd790
JB		 455/* frame sending functions */
456
66e67e41 457static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
9dde6423 458 struct sk_buff *skb, u8 ap_ht_param,
66e67e41
JB		 459 struct ieee80211_supported_band *sband,
460 struct ieee80211_channel *channel,
461 enum ieee80211_smps_mode smps)
462{
66e67e41
JB		 463 u8 *pos;
464 u32 flags = channel->flags;
465 u16 cap;
466 struct ieee80211_sta_ht_cap ht_cap;
467
468 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
469
66e67e41
JB		 470 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
471 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
472
66e67e41
JB		 473 /* determine capability flags */
474 cap = ht_cap.cap;
475
9dde6423 476 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
66e67e41
JB		 477 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
478 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
479 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
480 cap &= ~IEEE80211_HT_CAP_SGI_40;
481 }
482 break;
483 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
484 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
485 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
486 cap &= ~IEEE80211_HT_CAP_SGI_40;
487 }
488 break;
489 }
490
24398e39
JB		 491 /*
492 * If 40 MHz was disabled associate as though we weren't
493 * capable of 40 MHz -- some broken APs will never fall
494 * back to trying to transmit in 20 MHz.
495 */
496 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
497 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
498 cap &= ~IEEE80211_HT_CAP_SGI_40;
499 }
500
66e67e41
JB		 501 /* set SM PS mode properly */
502 cap &= ~IEEE80211_HT_CAP_SM_PS;
503 switch (smps) {
504 case IEEE80211_SMPS_AUTOMATIC:
505 case IEEE80211_SMPS_NUM_MODES:
506 WARN_ON(1);
507 case IEEE80211_SMPS_OFF:
508 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
509 IEEE80211_HT_CAP_SM_PS_SHIFT;
510 break;
511 case IEEE80211_SMPS_STATIC:
512 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
513 IEEE80211_HT_CAP_SM_PS_SHIFT;
514 break;
515 case IEEE80211_SMPS_DYNAMIC:
516 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
517 IEEE80211_HT_CAP_SM_PS_SHIFT;
518 break;
519 }
520
521 /* reserve and fill IE */
522 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
523 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
524}
525
d545daba
MP		 526static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
527 struct sk_buff *skb,
b08fbbd8
JB		 528 struct ieee80211_supported_band *sband,
529 struct ieee80211_vht_cap *ap_vht_cap)
d545daba
MP		 530{
531 u8 *pos;
532 u32 cap;
533 struct ieee80211_sta_vht_cap vht_cap;
c1cf6d4e 534 u32 mask, ap_bf_sts, our_bf_sts;
d545daba
MP		 535
536 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
537
538 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
dd5ecfea 539 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
d545daba
MP		 540
541 /* determine capability flags */
542 cap = vht_cap.cap;
543
f2d9d270
JB		 544 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
545 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ;
546 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
547 }
548
549 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
550 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
551 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
552 }
553
b08fbbd8
JB		 554 /*
555 * Some APs apparently get confused if our capabilities are better
556 * than theirs, so restrict what we advertise in the assoc request.
557 */
558 if (!(ap_vht_cap->vht_cap_info &
559 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
560 cap &= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE;
561
c1cf6d4e
ES		 562 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK;
563
564 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask;
565 our_bf_sts = cap & mask;
566
567 if (ap_bf_sts < our_bf_sts) {
568 cap &= ~mask;
569 cap |= ap_bf_sts;
570 }
571
d545daba 572 /* reserve and fill IE */
d4950281 573 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
d545daba
MP		 574 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
575}
576
66e67e41
JB		 577static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
578{
579 struct ieee80211_local *local = sdata->local;
580 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
581 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
582 struct sk_buff *skb;
583 struct ieee80211_mgmt *mgmt;
584 u8 *pos, qos_info;
585 size_t offset = 0, noffset;
2103dec1 586 int i, count, rates_len, supp_rates_len, shift;
66e67e41
JB		 587 u16 capab;
588 struct ieee80211_supported_band *sband;
55de908a
JB		 589 struct ieee80211_chanctx_conf *chanctx_conf;
590 struct ieee80211_channel *chan;
2103dec1 591 u32 rate_flags, rates = 0;
66e67e41 592
8d61ffa5 593 sdata_assert_lock(sdata);
66e67e41 594
55de908a
JB		 595 rcu_read_lock();
596 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
597 if (WARN_ON(!chanctx_conf)) {
598 rcu_read_unlock();
599 return;
600 }
4bf88530 601 chan = chanctx_conf->def.chan;
2103dec1 602 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
55de908a
JB		 603 rcu_read_unlock();
604 sband = local->hw.wiphy->bands[chan->band];
2103dec1 605 shift = ieee80211_vif_get_shift(&sdata->vif);
66e67e41
JB		 606
607 if (assoc_data->supp_rates_len) {
608 /*
609 * Get all rates supported by the device and the AP as
610 * some APs don't like getting a superset of their rates
611 * in the association request (e.g. D-Link DAP 1353 in
612 * b-only mode)...
613 */
2103dec1
SW		 614 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
615 assoc_data->supp_rates,
616 assoc_data->supp_rates_len,
617 &rates);
66e67e41
JB		 618 } else {
619 /*
620 * In case AP not provide any supported rates information
621 * before association, we send information element(s) with
622 * all rates that we support.
623 */
2103dec1
SW		 624 rates_len = 0;
625 for (i = 0; i < sband->n_bitrates; i++) {
626 if ((rate_flags & sband->bitrates[i].flags)
627 != rate_flags)
628 continue;
629 rates |= BIT(i);
630 rates_len++;
631 }
66e67e41
JB		 632 }
633
634 skb = alloc_skb(local->hw.extra_tx_headroom +
635 sizeof(*mgmt) + /* bit too much but doesn't matter */
636 2 + assoc_data->ssid_len + /* SSID */
637 4 + rates_len + /* (extended) rates */
638 4 + /* power capability */
639 2 + 2 * sband->n_channels + /* supported channels */
640 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
d4950281 641 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
66e67e41
JB		 642 assoc_data->ie_len + /* extra IEs */
643 9, /* WMM */
644 GFP_KERNEL);
645 if (!skb)
646 return;
647
648 skb_reserve(skb, local->hw.extra_tx_headroom);
649
650 capab = WLAN_CAPABILITY_ESS;
651
652 if (sband->band == IEEE80211_BAND_2GHZ) {
653 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
654 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
655 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
656 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
657 }
658
659 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
660 capab |= WLAN_CAPABILITY_PRIVACY;
661
662 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
663 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
664 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
665
666 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
667 memset(mgmt, 0, 24);
668 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
669 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
670 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
671
672 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
673 skb_put(skb, 10);
674 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
675 IEEE80211_STYPE_REASSOC_REQ);
676 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
677 mgmt->u.reassoc_req.listen_interval =
678 cpu_to_le16(local->hw.conf.listen_interval);
679 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
680 ETH_ALEN);
681 } else {
682 skb_put(skb, 4);
683 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
684 IEEE80211_STYPE_ASSOC_REQ);
685 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
686 mgmt->u.assoc_req.listen_interval =
687 cpu_to_le16(local->hw.conf.listen_interval);
688 }
689
690 /* SSID */
691 pos = skb_put(skb, 2 + assoc_data->ssid_len);
692 *pos++ = WLAN_EID_SSID;
693 *pos++ = assoc_data->ssid_len;
694 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
695
696 /* add all rates which were marked to be used above */
697 supp_rates_len = rates_len;
698 if (supp_rates_len > 8)
699 supp_rates_len = 8;
700
701 pos = skb_put(skb, supp_rates_len + 2);
702 *pos++ = WLAN_EID_SUPP_RATES;
703 *pos++ = supp_rates_len;
704
705 count = 0;
706 for (i = 0; i < sband->n_bitrates; i++) {
707 if (BIT(i) & rates) {
2103dec1
SW		 708 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
709 5 * (1 << shift));
710 *pos++ = (u8) rate;
66e67e41
JB		 711 if (++count == 8)
712 break;
713 }
714 }
715
716 if (rates_len > count) {
717 pos = skb_put(skb, rates_len - count + 2);
718 *pos++ = WLAN_EID_EXT_SUPP_RATES;
719 *pos++ = rates_len - count;
720
721 for (i++; i < sband->n_bitrates; i++) {
722 if (BIT(i) & rates) {
2103dec1
SW		 723 int rate;
724 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
725 5 * (1 << shift));
726 *pos++ = (u8) rate;
66e67e41
JB		 727 }
728 }
729 }
730
731 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
732 /* 1. power capabilities */
733 pos = skb_put(skb, 4);
734 *pos++ = WLAN_EID_PWR_CAPABILITY;
735 *pos++ = 2;
736 *pos++ = 0; /* min tx power */
0430c883
SW		 737 /* max tx power */
738 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
66e67e41
JB		 739
740 /* 2. supported channels */
741 /* TODO: get this in reg domain format */
742 pos = skb_put(skb, 2 * sband->n_channels + 2);
743 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
744 *pos++ = 2 * sband->n_channels;
745 for (i = 0; i < sband->n_channels; i++) {
746 *pos++ = ieee80211_frequency_to_channel(
747 sband->channels[i].center_freq);
748 *pos++ = 1; /* one channel in the subband*/
749 }
750 }
751
752 /* if present, add any custom IEs that go before HT */
b3f51e94 753 if (assoc_data->ie_len) {
66e67e41
JB		 754 static const u8 before_ht[] = {
755 WLAN_EID_SSID,
756 WLAN_EID_SUPP_RATES,
757 WLAN_EID_EXT_SUPP_RATES,
758 WLAN_EID_PWR_CAPABILITY,
759 WLAN_EID_SUPPORTED_CHANNELS,
760 WLAN_EID_RSN,
761 WLAN_EID_QOS_CAPA,
762 WLAN_EID_RRM_ENABLED_CAPABILITIES,
763 WLAN_EID_MOBILITY_DOMAIN,
764 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
765 };
766 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
767 before_ht, ARRAY_SIZE(before_ht),
768 offset);
769 pos = skb_put(skb, noffset - offset);
770 memcpy(pos, assoc_data->ie + offset, noffset - offset);
771 offset = noffset;
772 }
773
f2d9d270
JB		 774 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
775 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
776 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
777
a8243b72 778 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
9dde6423 779 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
04ecd257 780 sband, chan, sdata->smps_mode);
66e67e41 781
3de3802c
JB		 782 /* if present, add any custom IEs that go before VHT */
783 if (assoc_data->ie_len) {
784 static const u8 before_vht[] = {
785 WLAN_EID_SSID,
786 WLAN_EID_SUPP_RATES,
787 WLAN_EID_EXT_SUPP_RATES,
788 WLAN_EID_PWR_CAPABILITY,
789 WLAN_EID_SUPPORTED_CHANNELS,
790 WLAN_EID_RSN,
791 WLAN_EID_QOS_CAPA,
792 WLAN_EID_RRM_ENABLED_CAPABILITIES,
793 WLAN_EID_MOBILITY_DOMAIN,
794 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
795 WLAN_EID_HT_CAPABILITY,
796 WLAN_EID_BSS_COEX_2040,
797 WLAN_EID_EXT_CAPABILITY,
798 WLAN_EID_QOS_TRAFFIC_CAPA,
799 WLAN_EID_TIM_BCAST_REQ,
800 WLAN_EID_INTERWORKING,
801 };
802 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
803 before_vht, ARRAY_SIZE(before_vht),
804 offset);
805 pos = skb_put(skb, noffset - offset);
806 memcpy(pos, assoc_data->ie + offset, noffset - offset);
807 offset = noffset;
808 }
809
d545daba 810 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
b08fbbd8
JB		 811 ieee80211_add_vht_ie(sdata, skb, sband,
812 &assoc_data->ap_vht_cap);
d545daba 813
66e67e41 814 /* if present, add any custom non-vendor IEs that go after HT */
b3f51e94 815 if (assoc_data->ie_len) {
66e67e41
JB		 816 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
817 assoc_data->ie_len,
818 offset);
819 pos = skb_put(skb, noffset - offset);
820 memcpy(pos, assoc_data->ie + offset, noffset - offset);
821 offset = noffset;
822 }
823
76f0303d
JB		 824 if (assoc_data->wmm) {
825 if (assoc_data->uapsd) {
dc41e4d4
EP		 826 qos_info = ifmgd->uapsd_queues;
827 qos_info |= (ifmgd->uapsd_max_sp_len <<
66e67e41
JB		 828 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
829 } else {
830 qos_info = 0;
831 }
832
833 pos = skb_put(skb, 9);
834 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
835 *pos++ = 7; /* len */
836 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
837 *pos++ = 0x50;
838 *pos++ = 0xf2;
839 *pos++ = 2; /* WME */
840 *pos++ = 0; /* WME info */
841 *pos++ = 1; /* WME ver */
842 *pos++ = qos_info;
843 }
844
845 /* add any remaining custom (i.e. vendor specific here) IEs */
b3f51e94 846 if (assoc_data->ie_len) {
66e67e41
JB		 847 noffset = assoc_data->ie_len;
848 pos = skb_put(skb, noffset - offset);
849 memcpy(pos, assoc_data->ie + offset, noffset - offset);
850 }
851
a1845fc7
JB		 852 drv_mgd_prepare_tx(local, sdata);
853
66e67e41 854 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1672c0e3
JB		 855 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
856 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
857 IEEE80211_TX_INTFL_MLME_CONN_TX;
66e67e41
JB		 858 ieee80211_tx_skb(sdata, skb);
859}
860
572e0012
KV		 861void ieee80211_send_pspoll(struct ieee80211_local *local,
862 struct ieee80211_sub_if_data *sdata)
863{
572e0012
KV		 864 struct ieee80211_pspoll *pspoll;
865 struct sk_buff *skb;
572e0012 866
d8cd189e
KV		 867 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
868 if (!skb)
572e0012 869 return;
572e0012 870
d8cd189e
KV		 871 pspoll = (struct ieee80211_pspoll *) skb->data;
872 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
572e0012 873
62ae67be
JB		 874 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
875 ieee80211_tx_skb(sdata, skb);
572e0012
KV		 876}
877
965bedad
JB		 878void ieee80211_send_nullfunc(struct ieee80211_local *local,
879 struct ieee80211_sub_if_data *sdata,
880 int powersave)
881{
882 struct sk_buff *skb;
d8cd189e 883 struct ieee80211_hdr_3addr *nullfunc;
b6f35301 884 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
965bedad 885
d8cd189e
KV		 886 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
887 if (!skb)
965bedad 888 return;
965bedad 889
d8cd189e 890 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
965bedad 891 if (powersave)
d8cd189e 892 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
965bedad 893
6c17b77b
SF		 894 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
895 IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
ff40b425
PF		 896
897 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
898 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
899
392b9ffb 900 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
b6f35301
RM		 901 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
902
62ae67be 903 ieee80211_tx_skb(sdata, skb);
965bedad
JB		 904}
905
d524215f
FF		 906static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
907 struct ieee80211_sub_if_data *sdata)
908{
909 struct sk_buff *skb;
910 struct ieee80211_hdr *nullfunc;
911 __le16 fc;
912
913 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
914 return;
915
916 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
d15b8459 917 if (!skb)
d524215f 918 return;
d15b8459 919
d524215f
FF		 920 skb_reserve(skb, local->hw.extra_tx_headroom);
921
922 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
923 memset(nullfunc, 0, 30);
924 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
925 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
926 nullfunc->frame_control = fc;
927 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
928 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
929 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
930 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
931
932 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
933 ieee80211_tx_skb(sdata, skb);
934}
935
cc32abd4
JB		 936/* spectrum management related things */
937static void ieee80211_chswitch_work(struct work_struct *work)
938{
939 struct ieee80211_sub_if_data *sdata =
940 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
675a0b04 941 struct ieee80211_local *local = sdata->local;
cc32abd4 942 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
7578d575 943 int ret;
cc32abd4 944
9607e6b6 945 if (!ieee80211_sdata_running(sdata))
cc32abd4
JB		 946 return;
947
8d61ffa5 948 sdata_lock(sdata);
4c3ebc56
MK		 949 mutex_lock(&local->mtx);
950 mutex_lock(&local->chanctx_mtx);
951
77fdaa12
JB		 952 if (!ifmgd->associated)
953 goto out;
cc32abd4 954
4c3ebc56
MK		 955 if (!sdata->vif.csa_active)
956 goto out;
957
958 /*
959 * using reservation isn't immediate as it may be deferred until later
960 * with multi-vif. once reservation is complete it will re-schedule the
961 * work with no reserved_chanctx so verify chandef to check if it
962 * completed successfully
963 */
964
965 if (sdata->reserved_chanctx) {
966 /*
967 * with multi-vif csa driver may call ieee80211_csa_finish()
968 * many times while waiting for other interfaces to use their
969 * reservations
970 */
971 if (sdata->reserved_ready)
972 goto out;
973
974 ret = ieee80211_vif_use_reserved_context(sdata);
975 if (ret) {
976 sdata_info(sdata,
977 "failed to use reserved channel context, disconnecting (err=%d)\n",
978 ret);
979 ieee80211_queue_work(&sdata->local->hw,
980 &ifmgd->csa_connection_drop_work);
981 goto out;
982 }
983
984 goto out;
985 }
986
987 if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
988 &sdata->csa_chandef)) {
7578d575 989 sdata_info(sdata,
4c3ebc56 990 "failed to finalize channel switch, disconnecting\n");
7578d575
AN		 991 ieee80211_queue_work(&sdata->local->hw,
992 &ifmgd->csa_connection_drop_work);
993 goto out;
994 }
675a0b04 995
cc32abd4 996 /* XXX: shouldn't really modify cfg80211-owned data! */
33787fc4 997 ifmgd->associated->channel = sdata->csa_chandef.chan;
cc32abd4 998
59af6928 999 sdata->vif.csa_active = false;
4c3ebc56 1000
57eebdf3 1001 /* XXX: wait for a beacon first? */
a46992b4
LC		 1002 if (sdata->csa_block_tx) {
1003 ieee80211_wake_vif_queues(local, sdata,
1004 IEEE80211_QUEUE_STOP_REASON_CSA);
1005 sdata->csa_block_tx = false;
1006 }
7578d575 1007
77fdaa12 1008 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
59af6928 1009
e5593f56
MK		 1010 ieee80211_sta_reset_beacon_monitor(sdata);
1011 ieee80211_sta_reset_conn_monitor(sdata);
1012
59af6928 1013out:
4c3ebc56
MK		 1014 mutex_unlock(&local->chanctx_mtx);
1015 mutex_unlock(&local->mtx);
8d61ffa5 1016 sdata_unlock(sdata);
cc32abd4
JB		 1017}
1018
5ce6e438
JB		 1019void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1020{
55de908a
JB		 1021 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1022 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5ce6e438
JB		 1023
1024 trace_api_chswitch_done(sdata, success);
1025 if (!success) {
882a7c69
JB		 1026 sdata_info(sdata,
1027 "driver channel switch failed, disconnecting\n");
1028 ieee80211_queue_work(&sdata->local->hw,
1029 &ifmgd->csa_connection_drop_work);
1030 } else {
1031 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
5ce6e438 1032 }
5ce6e438
JB		 1033}
1034EXPORT_SYMBOL(ieee80211_chswitch_done);
1035
cc32abd4
JB		 1036static void ieee80211_chswitch_timer(unsigned long data)
1037{
1038 struct ieee80211_sub_if_data *sdata =
1039 (struct ieee80211_sub_if_data *) data;
5bb644a0 1040
9b7d72c1 1041 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
cc32abd4
JB		 1042}
1043
37799e52 1044static void
4a3cb702 1045ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
04a161f4
JB		 1046 u64 timestamp, struct ieee802_11_elems *elems,
1047 bool beacon)
cc32abd4 1048{
b4f286a1 1049 struct ieee80211_local *local = sdata->local;
cc32abd4 1050 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
37799e52 1051 struct cfg80211_bss *cbss = ifmgd->associated;
4c3ebc56 1052 struct ieee80211_chanctx_conf *conf;
55de908a 1053 struct ieee80211_chanctx *chanctx;
e6b7cde4 1054 enum ieee80211_band current_band;
c0f17eb9 1055 struct ieee80211_csa_ie csa_ie;
e6b7cde4 1056 int res;
cc32abd4 1057
8d61ffa5 1058 sdata_assert_lock(sdata);
77fdaa12 1059
37799e52 1060 if (!cbss)
cc32abd4
JB		 1061 return;
1062
b4f286a1 1063 if (local->scanning)
cc32abd4
JB		 1064 return;
1065
37799e52 1066 /* disregard subsequent announcements if we are already processing */
cc32abd4
JB		 1067 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
1068 return;
1069
e6b7cde4 1070 current_band = cbss->channel->band;
c0f17eb9 1071 memset(&csa_ie, 0, sizeof(csa_ie));
e6b7cde4
SW		 1072 res = ieee80211_parse_ch_switch_ie(sdata, elems, beacon, current_band,
1073 ifmgd->flags,
c0f17eb9 1074 ifmgd->associated->bssid, &csa_ie);
e6b7cde4 1075 if (res < 0)
b4f286a1 1076 ieee80211_queue_work(&local->hw,
882a7c69 1077 &ifmgd->csa_connection_drop_work);
e6b7cde4 1078 if (res)
cc32abd4 1079 return;
cd64f2a9 1080
c0f17eb9 1081 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
85220d71
JB		 1082 IEEE80211_CHAN_DISABLED)) {
1083 sdata_info(sdata,
1084 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
e6b7cde4 1085 ifmgd->associated->bssid,
c0f17eb9
CYY		 1086 csa_ie.chandef.chan->center_freq,
1087 csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1088 csa_ie.chandef.center_freq2);
85220d71
JB		 1089 ieee80211_queue_work(&local->hw,
1090 &ifmgd->csa_connection_drop_work);
1091 return;
1092 }
1093
57eebdf3
JB		 1094 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
1095
4c3ebc56 1096 mutex_lock(&local->mtx);
7578d575 1097 mutex_lock(&local->chanctx_mtx);
4c3ebc56
MK		 1098 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1099 lockdep_is_held(&local->chanctx_mtx));
1100 if (!conf) {
1101 sdata_info(sdata,
1102 "no channel context assigned to vif?, disconnecting\n");
1103 ieee80211_queue_work(&local->hw,
1104 &ifmgd->csa_connection_drop_work);
1105 mutex_unlock(&local->chanctx_mtx);
1106 mutex_unlock(&local->mtx);
1107 return;
1108 }
1109
1110 chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1111
b4f286a1 1112 if (local->use_chanctx) {
7578d575
AN		 1113 u32 num_chanctx = 0;
1114 list_for_each_entry(chanctx, &local->chanctx_list, list)
1115 num_chanctx++;
1116
1117 if (num_chanctx > 1 ||
1118 !(local->hw.flags & IEEE80211_HW_CHANCTX_STA_CSA)) {
1119 sdata_info(sdata,
1120 "not handling chan-switch with channel contexts\n");
1121 ieee80211_queue_work(&local->hw,
1122 &ifmgd->csa_connection_drop_work);
1123 mutex_unlock(&local->chanctx_mtx);
4c3ebc56 1124 mutex_unlock(&local->mtx);
7578d575
AN		 1125 return;
1126 }
55de908a
JB		 1127 }
1128
4c3ebc56
MK		 1129 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1130 chanctx->mode, false);
1131 if (res) {
55de908a 1132 sdata_info(sdata,
4c3ebc56
MK		 1133 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1134 res);
b4f286a1 1135 ieee80211_queue_work(&local->hw,
55de908a 1136 &ifmgd->csa_connection_drop_work);
b4f286a1 1137 mutex_unlock(&local->chanctx_mtx);
4c3ebc56 1138 mutex_unlock(&local->mtx);
55de908a
JB		 1139 return;
1140 }
b4f286a1 1141 mutex_unlock(&local->chanctx_mtx);
55de908a 1142
c46a73f3 1143 sdata->vif.csa_active = true;
4c3ebc56 1144 sdata->csa_chandef = csa_ie.chandef;
59af6928 1145 sdata->csa_block_tx = csa_ie.mode;
55de908a 1146
59af6928 1147 if (sdata->csa_block_tx)
a46992b4
LC		 1148 ieee80211_stop_vif_queues(local, sdata,
1149 IEEE80211_QUEUE_STOP_REASON_CSA);
59af6928 1150 mutex_unlock(&local->mtx);
57eebdf3 1151
b4f286a1 1152 if (local->ops->channel_switch) {
5ce6e438 1153 /* use driver's channel switch callback */
57eebdf3
JB		 1154 struct ieee80211_channel_switch ch_switch = {
1155 .timestamp = timestamp,
c0f17eb9
CYY		 1156 .block_tx = csa_ie.mode,
1157 .chandef = csa_ie.chandef,
1158 .count = csa_ie.count,
57eebdf3
JB		 1159 };
1160
b4f286a1 1161 drv_channel_switch(local, &ch_switch);
5ce6e438
JB		 1162 return;
1163 }
1164
1165 /* channel switch handled in software */
c0f17eb9 1166 if (csa_ie.count <= 1)
b4f286a1 1167 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
57eebdf3 1168 else
cc32abd4 1169 mod_timer(&ifmgd->chswitch_timer,
c0f17eb9 1170 TU_TO_EXP_TIME(csa_ie.count * cbss->beacon_interval));
cc32abd4
JB		 1171}
1172
1ea6f9c0
JB		 1173static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1174 struct ieee80211_channel *channel,
1175 const u8 *country_ie, u8 country_ie_len,
1176 const u8 *pwr_constr_elem)
cc32abd4 1177{
04b7b2ff
JB		 1178 struct ieee80211_country_ie_triplet *triplet;
1179 int chan = ieee80211_frequency_to_channel(channel->center_freq);
1180 int i, chan_pwr, chan_increment, new_ap_level;
1181 bool have_chan_pwr = false;
cc32abd4 1182
04b7b2ff
JB		 1183 /* Invalid IE */
1184 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1ea6f9c0 1185 return 0;
cc32abd4 1186
04b7b2ff
JB		 1187 triplet = (void *)(country_ie + 3);
1188 country_ie_len -= 3;
1189
1190 switch (channel->band) {
1191 default:
1192 WARN_ON_ONCE(1);
1193 /* fall through */
1194 case IEEE80211_BAND_2GHZ:
1195 case IEEE80211_BAND_60GHZ:
1196 chan_increment = 1;
1197 break;
1198 case IEEE80211_BAND_5GHZ:
1199 chan_increment = 4;
1200 break;
cc32abd4 1201 }
04b7b2ff
JB		 1202
1203 /* find channel */
1204 while (country_ie_len >= 3) {
1205 u8 first_channel = triplet->chans.first_channel;
1206
1207 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1208 goto next;
1209
1210 for (i = 0; i < triplet->chans.num_channels; i++) {
1211 if (first_channel + i * chan_increment == chan) {
1212 have_chan_pwr = true;
1213 chan_pwr = triplet->chans.max_power;
1214 break;
1215 }
1216 }
1217 if (have_chan_pwr)
1218 break;
1219
1220 next:
1221 triplet++;
1222 country_ie_len -= 3;
1223 }
1224
1225 if (!have_chan_pwr)
1ea6f9c0 1226 return 0;
04b7b2ff
JB		 1227
1228 new_ap_level = max_t(int, 0, chan_pwr - *pwr_constr_elem);
1229
1ea6f9c0
JB		 1230 if (sdata->ap_power_level == new_ap_level)
1231 return 0;
04b7b2ff
JB		 1232
1233 sdata_info(sdata,
1234 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1235 new_ap_level, chan_pwr, *pwr_constr_elem,
1236 sdata->u.mgd.bssid);
1ea6f9c0
JB		 1237 sdata->ap_power_level = new_ap_level;
1238 if (__ieee80211_recalc_txpower(sdata))
1239 return BSS_CHANGED_TXPOWER;
1240 return 0;
cc32abd4
JB		 1241}
1242
965bedad
JB		 1243/* powersave */
1244static void ieee80211_enable_ps(struct ieee80211_local *local,
1245 struct ieee80211_sub_if_data *sdata)
1246{
1247 struct ieee80211_conf *conf = &local->hw.conf;
1248
d5edaedc
JB		 1249 /*
1250 * If we are scanning right now then the parameters will
1251 * take effect when scan finishes.
1252 */
fbe9c429 1253 if (local->scanning)
d5edaedc
JB		 1254 return;
1255
965bedad
JB		 1256 if (conf->dynamic_ps_timeout > 0 &&
1257 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
1258 mod_timer(&local->dynamic_ps_timer, jiffies +
1259 msecs_to_jiffies(conf->dynamic_ps_timeout));
1260 } else {
1261 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1262 ieee80211_send_nullfunc(local, sdata, 1);
375177bf 1263
2a13052f
JO		 1264 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1265 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
1266 return;
1267
1268 conf->flags |= IEEE80211_CONF_PS;
1269 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965bedad
JB		 1270 }
1271}
1272
1273static void ieee80211_change_ps(struct ieee80211_local *local)
1274{
1275 struct ieee80211_conf *conf = &local->hw.conf;
1276
1277 if (local->ps_sdata) {
965bedad
JB		 1278 ieee80211_enable_ps(local, local->ps_sdata);
1279 } else if (conf->flags & IEEE80211_CONF_PS) {
1280 conf->flags &= ~IEEE80211_CONF_PS;
1281 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1282 del_timer_sync(&local->dynamic_ps_timer);
1283 cancel_work_sync(&local->dynamic_ps_enable_work);
1284 }
1285}
1286
808118cb
JY		 1287static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1288{
1289 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1290 struct sta_info *sta = NULL;
c2c98fde 1291 bool authorized = false;
808118cb
JY		 1292
1293 if (!mgd->powersave)
1294 return false;
1295
05cb9108
JB		 1296 if (mgd->broken_ap)
1297 return false;
1298
808118cb
JY		 1299 if (!mgd->associated)
1300 return false;
1301
392b9ffb 1302 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
808118cb
JY		 1303 return false;
1304
989c6505 1305 if (!mgd->have_beacon)
ce857888
AB		 1306 return false;
1307
808118cb
JY		 1308 rcu_read_lock();
1309 sta = sta_info_get(sdata, mgd->bssid);
1310 if (sta)
c2c98fde 1311 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
808118cb
JY		 1312 rcu_read_unlock();
1313
c2c98fde 1314 return authorized;
808118cb
JY		 1315}
1316
965bedad 1317/* need to hold RTNL or interface lock */
10f644a4 1318void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 1319{
1320 struct ieee80211_sub_if_data *sdata, *found = NULL;
1321 int count = 0;
195e294d 1322 int timeout;
965bedad
JB		 1323
1324 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
1325 local->ps_sdata = NULL;
1326 return;
1327 }
1328
1329 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 1330 if (!ieee80211_sdata_running(sdata))
965bedad 1331 continue;
8c7914de
RM		 1332 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1333 /* If an AP vif is found, then disable PS
1334 * by setting the count to zero thereby setting
1335 * ps_sdata to NULL.
1336 */
1337 count = 0;
1338 break;
1339 }
965bedad
JB		 1340 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1341 continue;
1342 found = sdata;
1343 count++;
1344 }
1345
808118cb 1346 if (count == 1 && ieee80211_powersave_allowed(found)) {
10f644a4
JB		 1347 s32 beaconint_us;
1348
1349 if (latency < 0)
ed77134b 1350 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
10f644a4
JB		 1351
1352 beaconint_us = ieee80211_tu_to_usec(
1353 found->vif.bss_conf.beacon_int);
1354
ff616381 1355 timeout = local->dynamic_ps_forced_timeout;
195e294d
JO		 1356 if (timeout < 0) {
1357 /*
ff616381
JO		 1358 * Go to full PSM if the user configures a very low
1359 * latency requirement.
0ab82b04
EP		 1360 * The 2000 second value is there for compatibility
1361 * until the PM_QOS_NETWORK_LATENCY is configured
1362 * with real values.
195e294d 1363 */
0ab82b04
EP		 1364 if (latency > (1900 * USEC_PER_MSEC) &&
1365 latency != (2000 * USEC_PER_SEC))
195e294d 1366 timeout = 0;
ff616381
JO		 1367 else
1368 timeout = 100;
195e294d 1369 }
09b85568 1370 local->hw.conf.dynamic_ps_timeout = timeout;
195e294d 1371
04fe2037 1372 if (beaconint_us > latency) {
10f644a4 1373 local->ps_sdata = NULL;
04fe2037 1374 } else {
04fe2037 1375 int maxslp = 1;
826262c3 1376 u8 dtimper = found->u.mgd.dtim_period;
56007a02
JB		 1377
1378 /* If the TIM IE is invalid, pretend the value is 1 */
1379 if (!dtimper)
1380 dtimper = 1;
1381 else if (dtimper > 1)
04fe2037
JB		 1382 maxslp = min_t(int, dtimper,
1383 latency / beaconint_us);
1384
9ccebe61 1385 local->hw.conf.max_sleep_period = maxslp;
56007a02 1386 local->hw.conf.ps_dtim_period = dtimper;
10f644a4 1387 local->ps_sdata = found;
04fe2037 1388 }
10f644a4 1389 } else {
965bedad 1390 local->ps_sdata = NULL;
10f644a4 1391 }
965bedad
JB		 1392
1393 ieee80211_change_ps(local);
1394}
1395
ab095877
EP		 1396void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1397{
1398 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1399
1400 if (sdata->vif.bss_conf.ps != ps_allowed) {
1401 sdata->vif.bss_conf.ps = ps_allowed;
1402 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1403 }
1404}
1405
965bedad
JB		 1406void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1407{
1408 struct ieee80211_local *local =
1409 container_of(work, struct ieee80211_local,
1410 dynamic_ps_disable_work);
1411
1412 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1413 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1414 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1415 }
1416
1417 ieee80211_wake_queues_by_reason(&local->hw,
445ea4e8 1418 IEEE80211_MAX_QUEUE_MAP,
cca07b00
LC		 1419 IEEE80211_QUEUE_STOP_REASON_PS,
1420 false);
965bedad
JB		 1421}
1422
1423void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1424{
1425 struct ieee80211_local *local =
1426 container_of(work, struct ieee80211_local,
1427 dynamic_ps_enable_work);
1428 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
5e34069c 1429 struct ieee80211_if_managed *ifmgd;
1ddc2867
RM		 1430 unsigned long flags;
1431 int q;
965bedad
JB		 1432
1433 /* can only happen when PS was just disabled anyway */
1434 if (!sdata)
1435 return;
1436
5e34069c
CL		 1437 ifmgd = &sdata->u.mgd;
1438
965bedad
JB		 1439 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1440 return;
1441
09b85568 1442 if (local->hw.conf.dynamic_ps_timeout > 0) {
77b7023a
AN		 1443 /* don't enter PS if TX frames are pending */
1444 if (drv_tx_frames_pending(local)) {
1ddc2867
RM		 1445 mod_timer(&local->dynamic_ps_timer, jiffies +
1446 msecs_to_jiffies(
1447 local->hw.conf.dynamic_ps_timeout));
1448 return;
1449 }
77b7023a
AN		 1450
1451 /*
1452 * transmission can be stopped by others which leads to
1453 * dynamic_ps_timer expiry. Postpone the ps timer if it
1454 * is not the actual idle state.
1455 */
1456 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1457 for (q = 0; q < local->hw.queues; q++) {
1458 if (local->queue_stop_reasons[q]) {
1459 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1460 flags);
1461 mod_timer(&local->dynamic_ps_timer, jiffies +
1462 msecs_to_jiffies(
1463 local->hw.conf.dynamic_ps_timeout));
1464 return;
1465 }
1466 }
1467 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1ddc2867 1468 }
1ddc2867 1469
375177bf 1470 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
9c38a8b4 1471 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
a1598383 1472 if (drv_tx_frames_pending(local)) {
e8306f98
VN		 1473 mod_timer(&local->dynamic_ps_timer, jiffies +
1474 msecs_to_jiffies(
1475 local->hw.conf.dynamic_ps_timeout));
a1598383 1476 } else {
e8306f98
VN		 1477 ieee80211_send_nullfunc(local, sdata, 1);
1478 /* Flush to get the tx status of nullfunc frame */
39ecc01d 1479 ieee80211_flush_queues(local, sdata);
e8306f98 1480 }
f3e85b9e
VN		 1481 }
1482
2a13052f
JO		 1483 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1484 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
375177bf
VN		 1485 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1486 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1487 local->hw.conf.flags |= IEEE80211_CONF_PS;
1488 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1489 }
965bedad
JB		 1490}
1491
1492void ieee80211_dynamic_ps_timer(unsigned long data)
1493{
1494 struct ieee80211_local *local = (void *) data;
1495
78f1a8b7 1496 if (local->quiescing || local->suspended)
5bb644a0
JB		 1497 return;
1498
42935eca 1499 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 1500}
1501
164eb02d
SW		 1502void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1503{
1504 struct delayed_work *delayed_work =
1505 container_of(work, struct delayed_work, work);
1506 struct ieee80211_sub_if_data *sdata =
1507 container_of(delayed_work, struct ieee80211_sub_if_data,
1508 dfs_cac_timer_work);
d2859df5 1509 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
164eb02d 1510
34a3740d
JB		 1511 mutex_lock(&sdata->local->mtx);
1512 if (sdata->wdev.cac_started) {
1513 ieee80211_vif_release_channel(sdata);
1514 cfg80211_cac_event(sdata->dev, &chandef,
1515 NL80211_RADAR_CAC_FINISHED,
1516 GFP_KERNEL);
1517 }
1518 mutex_unlock(&sdata->local->mtx);
164eb02d
SW		 1519}
1520
60f8b39c 1521/* MLME */
7d25745d 1522static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
4ced3f74 1523 struct ieee80211_sub_if_data *sdata,
4a3cb702 1524 const u8 *wmm_param, size_t wmm_param_len)
f0706e82 1525{
f0706e82 1526 struct ieee80211_tx_queue_params params;
4ced3f74 1527 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1528 size_t left;
1529 int count;
4a3cb702
JB		 1530 const u8 *pos;
1531 u8 uapsd_queues = 0;
f0706e82 1532
e1b3ec1a 1533 if (!local->ops->conf_tx)
7d25745d 1534 return false;
e1b3ec1a 1535
32c5057b 1536 if (local->hw.queues < IEEE80211_NUM_ACS)
7d25745d 1537 return false;
3434fbd3
JB		 1538
1539 if (!wmm_param)
7d25745d 1540 return false;
3434fbd3 1541
f0706e82 1542 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
7d25745d 1543 return false;
ab13315a
KV		 1544
1545 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
dc41e4d4 1546 uapsd_queues = ifmgd->uapsd_queues;
ab13315a 1547
f0706e82 1548 count = wmm_param[6] & 0x0f;
46900298 1549 if (count == ifmgd->wmm_last_param_set)
7d25745d 1550 return false;
46900298 1551 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 1552
1553 pos = wmm_param + 8;
1554 left = wmm_param_len - 8;
1555
1556 memset(&params, 0, sizeof(params));
1557
00e96dec 1558 sdata->wmm_acm = 0;
f0706e82
JB		 1559 for (; left >= 4; left -= 4, pos += 4) {
1560 int aci = (pos[0] >> 5) & 0x03;
1561 int acm = (pos[0] >> 4) & 0x01;
ab13315a 1562 bool uapsd = false;
f0706e82
JB		 1563 int queue;
1564
1565 switch (aci) {
0eeb59fe 1566 case 1: /* AC_BK */
e100bb64 1567 queue = 3;
988c0f72 1568 if (acm)
00e96dec 1569 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV		 1570 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1571 uapsd = true;
f0706e82 1572 break;
0eeb59fe 1573 case 2: /* AC_VI */
e100bb64 1574 queue = 1;
988c0f72 1575 if (acm)
00e96dec 1576 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV		 1577 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1578 uapsd = true;
f0706e82 1579 break;
0eeb59fe 1580 case 3: /* AC_VO */
e100bb64 1581 queue = 0;
988c0f72 1582 if (acm)
00e96dec 1583 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV		 1584 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1585 uapsd = true;
f0706e82 1586 break;
0eeb59fe 1587 case 0: /* AC_BE */
f0706e82 1588 default:
e100bb64 1589 queue = 2;
988c0f72 1590 if (acm)
00e96dec 1591 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV		 1592 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1593 uapsd = true;
f0706e82
JB		 1594 break;
1595 }
1596
1597 params.aifs = pos[0] & 0x0f;
1598 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1599 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 1600 params.txop = get_unaligned_le16(pos + 2);
908f8d07 1601 params.acm = acm;
ab13315a
KV		 1602 params.uapsd = uapsd;
1603
bdcbd8e0
JB		 1604 mlme_dbg(sdata,
1605 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1606 queue, aci, acm,
1607 params.aifs, params.cw_min, params.cw_max,
1608 params.txop, params.uapsd);
f6f3def3
EP		 1609 sdata->tx_conf[queue] = params;
1610 if (drv_conf_tx(local, sdata, queue, &params))
bdcbd8e0
JB		 1611 sdata_err(sdata,
1612 "failed to set TX queue parameters for queue %d\n",
1613 queue);
f0706e82 1614 }
e1b3ec1a
SG		 1615
1616 /* enable WMM or activate new settings */
4ced3f74 1617 sdata->vif.bss_conf.qos = true;
7d25745d 1618 return true;
f0706e82
JB		 1619}
1620
925e64c3
SG		 1621static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1622{
1623 lockdep_assert_held(&sdata->local->mtx);
1624
392b9ffb 1625 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
925e64c3
SG		 1626 ieee80211_run_deferred_scan(sdata->local);
1627}
1628
1629static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1630{
1631 mutex_lock(&sdata->local->mtx);
1632 __ieee80211_stop_poll(sdata);
1633 mutex_unlock(&sdata->local->mtx);
1634}
1635
7a5158ef
JB		 1636static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1637 u16 capab, bool erp_valid, u8 erp)
5628221c 1638{
bda3933a 1639 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 1640 u32 changed = 0;
7a5158ef
JB		 1641 bool use_protection;
1642 bool use_short_preamble;
1643 bool use_short_slot;
1644
1645 if (erp_valid) {
1646 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1647 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1648 } else {
1649 use_protection = false;
1650 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1651 }
1652
1653 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
55de908a 1654 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
43d35343 1655 use_short_slot = true;
5628221c 1656
471b3efd 1657 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 1658 bss_conf->use_cts_prot = use_protection;
1659 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 1660 }
7e9ed188 1661
d43c7b37 1662 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 1663 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 1664 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 1665 }
d9430a32 1666
7a5158ef 1667 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 1668 bss_conf->use_short_slot = use_short_slot;
1669 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 1670 }
1671
1672 return changed;
1673}
1674
f698d856 1675static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 1676 struct cfg80211_bss *cbss,
ae5eb026 1677 u32 bss_info_changed)
f0706e82 1678{
0c1ad2ca 1679 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 1680 struct ieee80211_local *local = sdata->local;
68542962 1681 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
d6f2da5b 1682
ae5eb026 1683 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 1684 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
50ae34a2 1685 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 1686
7ccc8bd7 1687 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
59c1ec2b 1688 beacon_loss_count * bss_conf->beacon_int));
7ccc8bd7 1689
0c1ad2ca
JB		 1690 sdata->u.mgd.associated = cbss;
1691 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 1692
17e4ec14
JM		 1693 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1694
488dd7b5 1695 if (sdata->vif.p2p) {
9caf0364 1696 const struct cfg80211_bss_ies *ies;
488dd7b5 1697
9caf0364
JB		 1698 rcu_read_lock();
1699 ies = rcu_dereference(cbss->ies);
1700 if (ies) {
9caf0364
JB		 1701 int ret;
1702
1703 ret = cfg80211_get_p2p_attr(
1704 ies->data, ies->len,
1705 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
67baf663
JD		 1706 (u8 *) &bss_conf->p2p_noa_attr,
1707 sizeof(bss_conf->p2p_noa_attr));
9caf0364 1708 if (ret >= 2) {
67baf663
JD		 1709 sdata->u.mgd.p2p_noa_index =
1710 bss_conf->p2p_noa_attr.index;
9caf0364 1711 bss_info_changed |= BSS_CHANGED_P2P_PS;
9caf0364 1712 }
488dd7b5 1713 }
9caf0364 1714 rcu_read_unlock();
488dd7b5
JB		 1715 }
1716
b291ba11 1717 /* just to be sure */
925e64c3 1718 ieee80211_stop_poll(sdata);
b291ba11 1719
9ac19a90 1720 ieee80211_led_assoc(local, 1);
9306102e 1721
989c6505 1722 if (sdata->u.mgd.have_beacon) {
826262c3
JB		 1723 /*
1724 * If the AP is buggy we may get here with no DTIM period
1725 * known, so assume it's 1 which is the only safe assumption
1726 * in that case, although if the TIM IE is broken powersave
1727 * probably just won't work at all.
1728 */
1729 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
817cee76 1730 bss_conf->beacon_rate = bss->beacon_rate;
989c6505 1731 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
826262c3 1732 } else {
817cee76 1733 bss_conf->beacon_rate = NULL;
e5b900d2 1734 bss_conf->dtim_period = 0;
826262c3 1735 }
e5b900d2 1736
68542962 1737 bss_conf->assoc = 1;
9cef8737 1738
a97c13c3 1739 /* Tell the driver to monitor connection quality (if supported) */
ea086359 1740 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
68542962 1741 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 1742 bss_info_changed |= BSS_CHANGED_CQM;
1743
68542962 1744 /* Enable ARP filtering */
0f19b41e 1745 if (bss_conf->arp_addr_cnt)
68542962 1746 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
68542962 1747
ae5eb026 1748 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 1749
056508dc
JB		 1750 mutex_lock(&local->iflist_mtx);
1751 ieee80211_recalc_ps(local, -1);
1752 mutex_unlock(&local->iflist_mtx);
e0cb686f 1753
04ecd257 1754 ieee80211_recalc_smps(sdata);
ab095877
EP		 1755 ieee80211_recalc_ps_vif(sdata);
1756
9ac19a90 1757 netif_carrier_on(sdata->dev);
f0706e82
JB		 1758}
1759
e69e95db 1760static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
37ad3888
JB		 1761 u16 stype, u16 reason, bool tx,
1762 u8 *frame_buf)
aa458d17 1763{
46900298 1764 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17 1765 struct ieee80211_local *local = sdata->local;
3cc5240b 1766 u32 changed = 0;
aa458d17 1767
8d61ffa5 1768 sdata_assert_lock(sdata);
77fdaa12 1769
37ad3888
JB		 1770 if (WARN_ON_ONCE(tx && !frame_buf))
1771 return;
1772
b291ba11
JB		 1773 if (WARN_ON(!ifmgd->associated))
1774 return;
1775
79543d8e
DS		 1776 ieee80211_stop_poll(sdata);
1777
77fdaa12 1778 ifmgd->associated = NULL;
aa458d17
TW		 1779 netif_carrier_off(sdata->dev);
1780
88bc40e8
EP		 1781 /*
1782 * if we want to get out of ps before disassoc (why?) we have
1783 * to do it before sending disassoc, as otherwise the null-packet
1784 * won't be valid.
1785 */
1786 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1787 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1788 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1789 }
1790 local->ps_sdata = NULL;
1791
ab095877
EP		 1792 /* disable per-vif ps */
1793 ieee80211_recalc_ps_vif(sdata);
1794
f823981e
EP		 1795 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1796 if (tx)
39ecc01d 1797 ieee80211_flush_queues(local, sdata);
f823981e 1798
37ad3888
JB		 1799 /* deauthenticate/disassociate now */
1800 if (tx || frame_buf)
88a9e31c
EP		 1801 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
1802 reason, tx, frame_buf);
37ad3888
JB		 1803
1804 /* flush out frame */
1805 if (tx)
39ecc01d 1806 ieee80211_flush_queues(local, sdata);
37ad3888 1807
88a9e31c
EP		 1808 /* clear bssid only after building the needed mgmt frames */
1809 memset(ifmgd->bssid, 0, ETH_ALEN);
1810
37ad3888 1811 /* remove AP and TDLS peers */
d34ba216 1812 sta_info_flush(sdata);
37ad3888
JB		 1813
1814 /* finally reset all BSS / config parameters */
f5e5bf25
TW		 1815 changed |= ieee80211_reset_erp_info(sdata);
1816
f5e5bf25 1817 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 1818 changed |= BSS_CHANGED_ASSOC;
1819 sdata->vif.bss_conf.assoc = false;
f5e5bf25 1820
67baf663
JD		 1821 ifmgd->p2p_noa_index = -1;
1822 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
1823 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
488dd7b5 1824
dd5ecfea 1825 /* on the next assoc, re-program HT/VHT parameters */
ef96a842
BG		 1826 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1827 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
dd5ecfea
JB		 1828 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
1829 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
413ad50a 1830
1ea6f9c0 1831 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
a8302de9 1832
520eb820
KV		 1833 del_timer_sync(&local->dynamic_ps_timer);
1834 cancel_work_sync(&local->dynamic_ps_enable_work);
1835
68542962 1836 /* Disable ARP filtering */
0f19b41e 1837 if (sdata->vif.bss_conf.arp_addr_cnt)
68542962 1838 changed |= BSS_CHANGED_ARP_FILTER;
68542962 1839
3abead59
JB		 1840 sdata->vif.bss_conf.qos = false;
1841 changed |= BSS_CHANGED_QOS;
1842
0aaffa9b
JB		 1843 /* The BSSID (not really interesting) and HT changed */
1844 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 1845 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 1846
3abead59
JB		 1847 /* disassociated - set to defaults now */
1848 ieee80211_set_wmm_default(sdata, false);
1849
b9dcf712
JB		 1850 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1851 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1852 del_timer_sync(&sdata->u.mgd.timer);
1853 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2d9957cc 1854
826262c3 1855 sdata->vif.bss_conf.dtim_period = 0;
817cee76
AB		 1856 sdata->vif.bss_conf.beacon_rate = NULL;
1857
989c6505 1858 ifmgd->have_beacon = false;
826262c3 1859
028e8da0 1860 ifmgd->flags = 0;
34a3740d 1861 mutex_lock(&local->mtx);
028e8da0 1862 ieee80211_vif_release_channel(sdata);
59af6928
MK		 1863
1864 sdata->vif.csa_active = false;
a46992b4
LC		 1865 if (sdata->csa_block_tx) {
1866 ieee80211_wake_vif_queues(local, sdata,
1867 IEEE80211_QUEUE_STOP_REASON_CSA);
1868 sdata->csa_block_tx = false;
1869 }
34a3740d 1870 mutex_unlock(&local->mtx);
2475b1cc
MS		 1871
1872 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
aa458d17 1873}
f0706e82 1874
3cf335d5
KV		 1875void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1876 struct ieee80211_hdr *hdr)
1877{
1878 /*
1879 * We can postpone the mgd.timer whenever receiving unicast frames
1880 * from AP because we know that the connection is working both ways
1881 * at that time. But multicast frames (and hence also beacons) must
1882 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 1883 * data idle periods for sending the periodic probe request to the
1884 * AP we're connected to.
3cf335d5 1885 */
b291ba11
JB		 1886 if (is_multicast_ether_addr(hdr->addr1))
1887 return;
1888
be099e82 1889 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 1890}
f0706e82 1891
4e5ff376
FF		 1892static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1893{
1894 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
133d40f9 1895 struct ieee80211_local *local = sdata->local;
4e5ff376 1896
133d40f9 1897 mutex_lock(&local->mtx);
392b9ffb
SG		 1898 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
1899 goto out;
4e5ff376 1900
925e64c3 1901 __ieee80211_stop_poll(sdata);
133d40f9
SG		 1902
1903 mutex_lock(&local->iflist_mtx);
1904 ieee80211_recalc_ps(local, -1);
1905 mutex_unlock(&local->iflist_mtx);
4e5ff376
FF		 1906
1907 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
133d40f9 1908 goto out;
4e5ff376
FF		 1909
1910 /*
1911 * We've received a probe response, but are not sure whether
1912 * we have or will be receiving any beacons or data, so let's
1913 * schedule the timers again, just in case.
1914 */
1915 ieee80211_sta_reset_beacon_monitor(sdata);
1916
1917 mod_timer(&ifmgd->conn_mon_timer,
1918 round_jiffies_up(jiffies +
1919 IEEE80211_CONNECTION_IDLE_TIME));
133d40f9 1920out:
133d40f9 1921 mutex_unlock(&local->mtx);
4e5ff376
FF		 1922}
1923
1924void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
04ac3c0e 1925 struct ieee80211_hdr *hdr, bool ack)
4e5ff376 1926{
75706d0e 1927 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF		 1928 return;
1929
4e5ff376
FF		 1930 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1931 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e 1932 if (ack)
cab1c7fd 1933 ieee80211_sta_reset_conn_monitor(sdata);
04ac3c0e
FF		 1934 else
1935 sdata->u.mgd.nullfunc_failed = true;
4e5ff376 1936 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
cab1c7fd 1937 return;
4e5ff376 1938 }
cab1c7fd
WD		 1939
1940 if (ack)
1941 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF		 1942}
1943
a43abf29
ML		 1944static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1945{
1946 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1947 const u8 *ssid;
f01a067d 1948 u8 *dst = ifmgd->associated->bssid;
180205bd 1949 u8 unicast_limit = max(1, max_probe_tries - 3);
f01a067d
LR		 1950
1951 /*
1952 * Try sending broadcast probe requests for the last three
1953 * probe requests after the first ones failed since some
1954 * buggy APs only support broadcast probe requests.
1955 */
1956 if (ifmgd->probe_send_count >= unicast_limit)
1957 dst = NULL;
a43abf29 1958
4e5ff376
FF		 1959 /*
1960 * When the hardware reports an accurate Tx ACK status, it's
1961 * better to send a nullfunc frame instead of a probe request,
1962 * as it will kick us off the AP quickly if we aren't associated
1963 * anymore. The timeout will be reset if the frame is ACKed by
1964 * the AP.
1965 */
992e68bf
SD		 1966 ifmgd->probe_send_count++;
1967
04ac3c0e
FF		 1968 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1969 ifmgd->nullfunc_failed = false;
4e5ff376 1970 ieee80211_send_nullfunc(sdata->local, sdata, 0);
04ac3c0e 1971 } else {
88c868c4
SG		 1972 int ssid_len;
1973
9caf0364 1974 rcu_read_lock();
4e5ff376 1975 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
88c868c4
SG		 1976 if (WARN_ON_ONCE(ssid == NULL))
1977 ssid_len = 0;
1978 else
1979 ssid_len = ssid[1];
1980
1981 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
1672c0e3 1982 0, (u32) -1, true, 0,
55de908a 1983 ifmgd->associated->channel, false);
9caf0364 1984 rcu_read_unlock();
4e5ff376 1985 }
a43abf29 1986
180205bd 1987 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
8d61ffa5 1988 run_again(sdata, ifmgd->probe_timeout);
f69b9c79 1989 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
39ecc01d 1990 ieee80211_flush_queues(sdata->local, sdata);
a43abf29
ML		 1991}
1992
b291ba11
JB		 1993static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1994 bool beacon)
04de8381 1995{
04de8381 1996 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 1997 bool already = false;
34bfc411 1998
9607e6b6 1999 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 2000 return;
2001
8d61ffa5 2002 sdata_lock(sdata);
77fdaa12
JB		 2003
2004 if (!ifmgd->associated)
2005 goto out;
2006
133d40f9
SG		 2007 mutex_lock(&sdata->local->mtx);
2008
2009 if (sdata->local->tmp_channel || sdata->local->scanning) {
2010 mutex_unlock(&sdata->local->mtx);
2011 goto out;
2012 }
2013
a13fbe54 2014 if (beacon) {
bdcbd8e0 2015 mlme_dbg_ratelimited(sdata,
59c1ec2b
BG		 2016 "detected beacon loss from AP (missed %d beacons) - probing\n",
2017 beacon_loss_count);
bdcbd8e0 2018
a13fbe54
BG		 2019 ieee80211_cqm_rssi_notify(&sdata->vif,
2020 NL80211_CQM_RSSI_BEACON_LOSS_EVENT,
2021 GFP_KERNEL);
2022 }
04de8381 2023
b291ba11
JB		 2024 /*
2025 * The driver/our work has already reported this event or the
2026 * connection monitoring has kicked in and we have already sent
2027 * a probe request. Or maybe the AP died and the driver keeps
2028 * reporting until we disassociate...
2029 *
2030 * In either case we have to ignore the current call to this
2031 * function (except for setting the correct probe reason bit)
2032 * because otherwise we would reset the timer every time and
2033 * never check whether we received a probe response!
2034 */
392b9ffb 2035 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
b291ba11
JB		 2036 already = true;
2037
12b5f34d
EP		 2038 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2039
133d40f9
SG		 2040 mutex_unlock(&sdata->local->mtx);
2041
b291ba11
JB		 2042 if (already)
2043 goto out;
2044
4e751843
JB		 2045 mutex_lock(&sdata->local->iflist_mtx);
2046 ieee80211_recalc_ps(sdata->local, -1);
2047 mutex_unlock(&sdata->local->iflist_mtx);
2048
a43abf29
ML		 2049 ifmgd->probe_send_count = 0;
2050 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12 2051 out:
8d61ffa5 2052 sdata_unlock(sdata);
04de8381
KV		 2053}
2054
a619a4c0
JO		 2055struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2056 struct ieee80211_vif *vif)
2057{
2058 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2059 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d9b3b28b 2060 struct cfg80211_bss *cbss;
a619a4c0
JO		 2061 struct sk_buff *skb;
2062 const u8 *ssid;
88c868c4 2063 int ssid_len;
a619a4c0
JO		 2064
2065 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2066 return NULL;
2067
8d61ffa5 2068 sdata_assert_lock(sdata);
a619a4c0 2069
d9b3b28b
EP		 2070 if (ifmgd->associated)
2071 cbss = ifmgd->associated;
2072 else if (ifmgd->auth_data)
2073 cbss = ifmgd->auth_data->bss;
2074 else if (ifmgd->assoc_data)
2075 cbss = ifmgd->assoc_data->bss;
2076 else
a619a4c0
JO		 2077 return NULL;
2078
9caf0364 2079 rcu_read_lock();
d9b3b28b 2080 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
88c868c4
SG		 2081 if (WARN_ON_ONCE(ssid == NULL))
2082 ssid_len = 0;
2083 else
2084 ssid_len = ssid[1];
2085
d9b3b28b 2086 skb = ieee80211_build_probe_req(sdata, cbss->bssid,
55de908a 2087 (u32) -1, cbss->channel,
6b77863b 2088 ssid + 2, ssid_len,
85a237fe 2089 NULL, 0, true);
9caf0364 2090 rcu_read_unlock();
a619a4c0
JO		 2091
2092 return skb;
2093}
2094EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2095
eef9e54c 2096static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
1e4dcd01 2097{
59af6928 2098 struct ieee80211_local *local = sdata->local;
1e4dcd01 2099 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 2100 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
1e4dcd01 2101
8d61ffa5 2102 sdata_lock(sdata);
1e4dcd01 2103 if (!ifmgd->associated) {
8d61ffa5 2104 sdata_unlock(sdata);
1e4dcd01
JO		 2105 return;
2106 }
2107
37ad3888
JB		 2108 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2109 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
eef9e54c 2110 true, frame_buf);
882a7c69 2111 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
59af6928
MK		 2112
2113 mutex_lock(&local->mtx);
7578d575 2114 sdata->vif.csa_active = false;
a46992b4
LC		 2115 if (sdata->csa_block_tx) {
2116 ieee80211_wake_vif_queues(local, sdata,
2117 IEEE80211_QUEUE_STOP_REASON_CSA);
2118 sdata->csa_block_tx = false;
2119 }
59af6928 2120 mutex_unlock(&local->mtx);
7da7cc1d 2121
6ff57cf8
JB		 2122 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
2123 IEEE80211_DEAUTH_FRAME_LEN);
8d61ffa5 2124 sdata_unlock(sdata);
1e4dcd01
JO		 2125}
2126
cc74c0c7 2127static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 2128{
2129 struct ieee80211_sub_if_data *sdata =
2130 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 2131 u.mgd.beacon_connection_loss_work);
a85e1d55
PS		 2132 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2133 struct sta_info *sta;
2134
2135 if (ifmgd->associated) {
30fa9047 2136 rcu_read_lock();
a85e1d55
PS		 2137 sta = sta_info_get(sdata, ifmgd->bssid);
2138 if (sta)
2139 sta->beacon_loss_count++;
30fa9047 2140 rcu_read_unlock();
a85e1d55 2141 }
b291ba11 2142
682bd38b 2143 if (ifmgd->connection_loss) {
882a7c69
JB		 2144 sdata_info(sdata, "Connection to AP %pM lost\n",
2145 ifmgd->bssid);
eef9e54c 2146 __ieee80211_disconnect(sdata);
882a7c69 2147 } else {
1e4dcd01 2148 ieee80211_mgd_probe_ap(sdata, true);
882a7c69
JB		 2149 }
2150}
2151
2152static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2153{
2154 struct ieee80211_sub_if_data *sdata =
2155 container_of(work, struct ieee80211_sub_if_data,
2156 u.mgd.csa_connection_drop_work);
2157
eef9e54c 2158 __ieee80211_disconnect(sdata);
b291ba11
JB		 2159}
2160
04de8381
KV		 2161void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2162{
2163 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 2164 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 2165
b5878a2d
JB		 2166 trace_api_beacon_loss(sdata);
2167
682bd38b 2168 sdata->u.mgd.connection_loss = false;
1e4dcd01 2169 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 2170}
2171EXPORT_SYMBOL(ieee80211_beacon_loss);
2172
1e4dcd01
JO		 2173void ieee80211_connection_loss(struct ieee80211_vif *vif)
2174{
2175 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2176 struct ieee80211_hw *hw = &sdata->local->hw;
2177
b5878a2d
JB		 2178 trace_api_connection_loss(sdata);
2179
682bd38b 2180 sdata->u.mgd.connection_loss = true;
1e4dcd01
JO		 2181 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2182}
2183EXPORT_SYMBOL(ieee80211_connection_loss);
2184
2185
66e67e41
JB		 2186static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2187 bool assoc)
2188{
2189 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2190
8d61ffa5 2191 sdata_assert_lock(sdata);
66e67e41 2192
66e67e41
JB		 2193 if (!assoc) {
2194 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2195
2196 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2197 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
028e8da0 2198 sdata->u.mgd.flags = 0;
34a3740d 2199 mutex_lock(&sdata->local->mtx);
55de908a 2200 ieee80211_vif_release_channel(sdata);
34a3740d 2201 mutex_unlock(&sdata->local->mtx);
66e67e41
JB		 2202 }
2203
5b112d3d 2204 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
66e67e41
JB		 2205 kfree(auth_data);
2206 sdata->u.mgd.auth_data = NULL;
2207}
2208
2209static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2210 struct ieee80211_mgmt *mgmt, size_t len)
2211{
1672c0e3 2212 struct ieee80211_local *local = sdata->local;
66e67e41
JB		 2213 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2214 u8 *pos;
2215 struct ieee802_11_elems elems;
1672c0e3 2216 u32 tx_flags = 0;
66e67e41
JB		 2217
2218 pos = mgmt->u.auth.variable;
b2e506bf 2219 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
66e67e41
JB		 2220 if (!elems.challenge)
2221 return;
2222 auth_data->expected_transaction = 4;
a1845fc7 2223 drv_mgd_prepare_tx(sdata->local, sdata);
1672c0e3
JB		 2224 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2225 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2226 IEEE80211_TX_INTFL_MLME_CONN_TX;
700e8ea6 2227 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
66e67e41
JB		 2228 elems.challenge - 2, elems.challenge_len + 2,
2229 auth_data->bss->bssid, auth_data->bss->bssid,
2230 auth_data->key, auth_data->key_len,
1672c0e3 2231 auth_data->key_idx, tx_flags);
66e67e41
JB		 2232}
2233
8d61ffa5
JB		 2234static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2235 struct ieee80211_mgmt *mgmt, size_t len)
66e67e41
JB		 2236{
2237 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2238 u8 bssid[ETH_ALEN];
2239 u16 auth_alg, auth_transaction, status_code;
2240 struct sta_info *sta;
2241
8d61ffa5 2242 sdata_assert_lock(sdata);
66e67e41
JB		 2243
2244 if (len < 24 + 6)
8d61ffa5 2245 return;
66e67e41
JB		 2246
2247 if (!ifmgd->auth_data || ifmgd->auth_data->done)
8d61ffa5 2248 return;
66e67e41
JB		 2249
2250 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2251
b203ca39 2252 if (!ether_addr_equal(bssid, mgmt->bssid))
8d61ffa5 2253 return;
66e67e41
JB		 2254
2255 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2256 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2257 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2258
2259 if (auth_alg != ifmgd->auth_data->algorithm ||
0f4126e8
JM		 2260 auth_transaction != ifmgd->auth_data->expected_transaction) {
2261 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2262 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2263 auth_transaction,
2264 ifmgd->auth_data->expected_transaction);
8d61ffa5 2265 return;
0f4126e8 2266 }
66e67e41
JB		 2267
2268 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2269 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2270 mgmt->sa, status_code);
dac211ec 2271 ieee80211_destroy_auth_data(sdata, false);
6ff57cf8 2272 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
8d61ffa5 2273 return;
66e67e41
JB		 2274 }
2275
2276 switch (ifmgd->auth_data->algorithm) {
2277 case WLAN_AUTH_OPEN:
2278 case WLAN_AUTH_LEAP:
2279 case WLAN_AUTH_FT:
6b8ece3a 2280 case WLAN_AUTH_SAE:
66e67e41
JB		 2281 break;
2282 case WLAN_AUTH_SHARED_KEY:
2283 if (ifmgd->auth_data->expected_transaction != 4) {
2284 ieee80211_auth_challenge(sdata, mgmt, len);
2285 /* need another frame */
8d61ffa5 2286 return;
66e67e41
JB		 2287 }
2288 break;
2289 default:
2290 WARN_ONCE(1, "invalid auth alg %d",
2291 ifmgd->auth_data->algorithm);
8d61ffa5 2292 return;
66e67e41
JB		 2293 }
2294
bdcbd8e0 2295 sdata_info(sdata, "authenticated\n");
66e67e41
JB		 2296 ifmgd->auth_data->done = true;
2297 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
89afe614 2298 ifmgd->auth_data->timeout_started = true;
8d61ffa5 2299 run_again(sdata, ifmgd->auth_data->timeout);
66e67e41 2300
6b8ece3a
JM		 2301 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2302 ifmgd->auth_data->expected_transaction != 2) {
2303 /*
2304 * Report auth frame to user space for processing since another
2305 * round of Authentication frames is still needed.
2306 */
6ff57cf8 2307 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
8d61ffa5 2308 return;
6b8ece3a
JM		 2309 }
2310
66e67e41
JB		 2311 /* move station state to auth */
2312 mutex_lock(&sdata->local->sta_mtx);
2313 sta = sta_info_get(sdata, bssid);
2314 if (!sta) {
2315 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2316 goto out_err;
2317 }
2318 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
bdcbd8e0 2319 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
66e67e41
JB		 2320 goto out_err;
2321 }
2322 mutex_unlock(&sdata->local->sta_mtx);
2323
6ff57cf8 2324 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
8d61ffa5 2325 return;
66e67e41
JB		 2326 out_err:
2327 mutex_unlock(&sdata->local->sta_mtx);
2328 /* ignore frame -- wait for timeout */
66e67e41
JB		 2329}
2330
dfa1ad29
CO		 2331#define case_WLAN(type) \
2332 case WLAN_REASON_##type: return #type
2333
2334static const char *ieee80211_get_reason_code_string(u16 reason_code)
2335{
2336 switch (reason_code) {
2337 case_WLAN(UNSPECIFIED);
2338 case_WLAN(PREV_AUTH_NOT_VALID);
2339 case_WLAN(DEAUTH_LEAVING);
2340 case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2341 case_WLAN(DISASSOC_AP_BUSY);
2342 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2343 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2344 case_WLAN(DISASSOC_STA_HAS_LEFT);
2345 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2346 case_WLAN(DISASSOC_BAD_POWER);
2347 case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2348 case_WLAN(INVALID_IE);
2349 case_WLAN(MIC_FAILURE);
2350 case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2351 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2352 case_WLAN(IE_DIFFERENT);
2353 case_WLAN(INVALID_GROUP_CIPHER);
2354 case_WLAN(INVALID_PAIRWISE_CIPHER);
2355 case_WLAN(INVALID_AKMP);
2356 case_WLAN(UNSUPP_RSN_VERSION);
2357 case_WLAN(INVALID_RSN_IE_CAP);
2358 case_WLAN(IEEE8021X_FAILED);
2359 case_WLAN(CIPHER_SUITE_REJECTED);
2360 case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2361 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2362 case_WLAN(DISASSOC_LOW_ACK);
2363 case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2364 case_WLAN(QSTA_LEAVE_QBSS);
2365 case_WLAN(QSTA_NOT_USE);
2366 case_WLAN(QSTA_REQUIRE_SETUP);
2367 case_WLAN(QSTA_TIMEOUT);
2368 case_WLAN(QSTA_CIPHER_NOT_SUPP);
2369 case_WLAN(MESH_PEER_CANCELED);
2370 case_WLAN(MESH_MAX_PEERS);
2371 case_WLAN(MESH_CONFIG);
2372 case_WLAN(MESH_CLOSE);
2373 case_WLAN(MESH_MAX_RETRIES);
2374 case_WLAN(MESH_CONFIRM_TIMEOUT);
2375 case_WLAN(MESH_INVALID_GTK);
2376 case_WLAN(MESH_INCONSISTENT_PARAM);
2377 case_WLAN(MESH_INVALID_SECURITY);
2378 case_WLAN(MESH_PATH_ERROR);
2379 case_WLAN(MESH_PATH_NOFORWARD);
2380 case_WLAN(MESH_PATH_DEST_UNREACHABLE);
2381 case_WLAN(MAC_EXISTS_IN_MBSS);
2382 case_WLAN(MESH_CHAN_REGULATORY);
2383 case_WLAN(MESH_CHAN);
2384 default: return "<unknown>";
2385 }
2386}
66e67e41 2387
8d61ffa5
JB		 2388static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2389 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2390{
46900298 2391 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 2392 const u8 *bssid = NULL;
f0706e82
JB		 2393 u16 reason_code;
2394
8d61ffa5 2395 sdata_assert_lock(sdata);
66e67e41 2396
f4ea83dd 2397 if (len < 24 + 2)
8d61ffa5 2398 return;
f0706e82 2399
66e67e41 2400 if (!ifmgd->associated ||
b203ca39 2401 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
8d61ffa5 2402 return;
77fdaa12 2403
0c1ad2ca 2404 bssid = ifmgd->associated->bssid;
f0706e82
JB		 2405
2406 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2407
dfa1ad29
CO		 2408 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
2409 bssid, reason_code, ieee80211_get_reason_code_string(reason_code));
77fdaa12 2410
37ad3888
JB		 2411 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2412
6ff57cf8 2413 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
f0706e82
JB		 2414}
2415
2416
8d61ffa5
JB		 2417static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2418 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2419{
46900298 2420 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 2421 u16 reason_code;
2422
8d61ffa5 2423 sdata_assert_lock(sdata);
77fdaa12 2424
66e67e41 2425 if (len < 24 + 2)
8d61ffa5 2426 return;
77fdaa12 2427
66e67e41 2428 if (!ifmgd->associated ||
b203ca39 2429 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
8d61ffa5 2430 return;
f0706e82
JB		 2431
2432 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2433
bdcbd8e0
JB		 2434 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2435 mgmt->sa, reason_code);
f0706e82 2436
37ad3888
JB		 2437 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2438
6ff57cf8 2439 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
f0706e82
JB		 2440}
2441
c74d084f
CL		 2442static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2443 u8 *supp_rates, unsigned int supp_rates_len,
2444 u32 *rates, u32 *basic_rates,
2445 bool *have_higher_than_11mbit,
2103dec1
SW		 2446 int *min_rate, int *min_rate_index,
2447 int shift, u32 rate_flags)
c74d084f
CL		 2448{
2449 int i, j;
2450
2451 for (i = 0; i < supp_rates_len; i++) {
2103dec1 2452 int rate = supp_rates[i] & 0x7f;
c74d084f
CL		 2453 bool is_basic = !!(supp_rates[i] & 0x80);
2454
2103dec1 2455 if ((rate * 5 * (1 << shift)) > 110)
c74d084f
CL		 2456 *have_higher_than_11mbit = true;
2457
2458 /*
2459 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2460 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2461 *
2462 * Note: Even through the membership selector and the basic
2463 * rate flag share the same bit, they are not exactly
2464 * the same.
2465 */
2466 if (!!(supp_rates[i] & 0x80) &&
2467 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2468 continue;
2469
2470 for (j = 0; j < sband->n_bitrates; j++) {
2103dec1
SW		 2471 struct ieee80211_rate *br;
2472 int brate;
2473
2474 br = &sband->bitrates[j];
2475 if ((rate_flags & br->flags) != rate_flags)
2476 continue;
2477
2478 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2479 if (brate == rate) {
c74d084f
CL		 2480 *rates |= BIT(j);
2481 if (is_basic)
2482 *basic_rates |= BIT(j);
2103dec1
SW		 2483 if ((rate * 5) < *min_rate) {
2484 *min_rate = rate * 5;
c74d084f
CL		 2485 *min_rate_index = j;
2486 }
2487 break;
2488 }
2489 }
2490 }
2491}
f0706e82 2492
66e67e41
JB		 2493static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2494 bool assoc)
2495{
2496 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2497
8d61ffa5 2498 sdata_assert_lock(sdata);
66e67e41 2499
66e67e41
JB		 2500 if (!assoc) {
2501 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2502
2503 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2504 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
028e8da0 2505 sdata->u.mgd.flags = 0;
34a3740d 2506 mutex_lock(&sdata->local->mtx);
55de908a 2507 ieee80211_vif_release_channel(sdata);
34a3740d 2508 mutex_unlock(&sdata->local->mtx);
66e67e41
JB		 2509 }
2510
2511 kfree(assoc_data);
2512 sdata->u.mgd.assoc_data = NULL;
2513}
2514
2515static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2516 struct cfg80211_bss *cbss,
af6b6374 2517 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2518{
46900298 2519 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 2520 struct ieee80211_local *local = sdata->local;
8318d78a 2521 struct ieee80211_supported_band *sband;
f0706e82 2522 struct sta_info *sta;
af6b6374 2523 u8 *pos;
af6b6374 2524 u16 capab_info, aid;
f0706e82 2525 struct ieee802_11_elems elems;
bda3933a 2526 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
35d865af
JB		 2527 const struct cfg80211_bss_ies *bss_ies = NULL;
2528 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
ae5eb026 2529 u32 changed = 0;
c74d084f 2530 int err;
35d865af 2531 bool ret;
f0706e82 2532
af6b6374 2533 /* AssocResp and ReassocResp have identical structure */
f0706e82 2534
f0706e82 2535 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 2536 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 2537
1dd84aa2 2538 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
bdcbd8e0
JB		 2539 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2540 aid);
1dd84aa2
JB		 2541 aid &= ~(BIT(15) | BIT(14));
2542
05cb9108
JB		 2543 ifmgd->broken_ap = false;
2544
2545 if (aid == 0 || aid > IEEE80211_MAX_AID) {
bdcbd8e0
JB		 2546 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2547 aid);
05cb9108
JB		 2548 aid = 0;
2549 ifmgd->broken_ap = true;
2550 }
2551
af6b6374 2552 pos = mgmt->u.assoc_resp.variable;
b2e506bf 2553 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
af6b6374 2554
f0706e82 2555 if (!elems.supp_rates) {
bdcbd8e0 2556 sdata_info(sdata, "no SuppRates element in AssocResp\n");
af6b6374 2557 return false;
f0706e82
JB		 2558 }
2559
46900298 2560 ifmgd->aid = aid;
f0706e82 2561
35d865af
JB		 2562 /*
2563 * Some APs are erroneously not including some information in their
2564 * (re)association response frames. Try to recover by using the data
2565 * from the beacon or probe response. This seems to afflict mobile
2566 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2567 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2568 */
2569 if ((assoc_data->wmm && !elems.wmm_param) ||
2570 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2571 (!elems.ht_cap_elem || !elems.ht_operation)) ||
2572 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2573 (!elems.vht_cap_elem || !elems.vht_operation))) {
2574 const struct cfg80211_bss_ies *ies;
2575 struct ieee802_11_elems bss_elems;
2576
2577 rcu_read_lock();
2578 ies = rcu_dereference(cbss->ies);
2579 if (ies)
2580 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2581 GFP_ATOMIC);
2582 rcu_read_unlock();
2583 if (!bss_ies)
2584 return false;
2585
2586 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2587 false, &bss_elems);
2588 if (assoc_data->wmm &&
2589 !elems.wmm_param && bss_elems.wmm_param) {
2590 elems.wmm_param = bss_elems.wmm_param;
2591 sdata_info(sdata,
2592 "AP bug: WMM param missing from AssocResp\n");
2593 }
2594
2595 /*
2596 * Also check if we requested HT/VHT, otherwise the AP doesn't
2597 * have to include the IEs in the (re)association response.
2598 */
2599 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2600 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2601 elems.ht_cap_elem = bss_elems.ht_cap_elem;
2602 sdata_info(sdata,
2603 "AP bug: HT capability missing from AssocResp\n");
2604 }
2605 if (!elems.ht_operation && bss_elems.ht_operation &&
2606 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2607 elems.ht_operation = bss_elems.ht_operation;
2608 sdata_info(sdata,
2609 "AP bug: HT operation missing from AssocResp\n");
2610 }
2611 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2612 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2613 elems.vht_cap_elem = bss_elems.vht_cap_elem;
2614 sdata_info(sdata,
2615 "AP bug: VHT capa missing from AssocResp\n");
2616 }
2617 if (!elems.vht_operation && bss_elems.vht_operation &&
2618 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2619 elems.vht_operation = bss_elems.vht_operation;
2620 sdata_info(sdata,
2621 "AP bug: VHT operation missing from AssocResp\n");
2622 }
2623 }
2624
30eb1dc2
JB		 2625 /*
2626 * We previously checked these in the beacon/probe response, so
2627 * they should be present here. This is just a safety net.
2628 */
2629 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2630 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2631 sdata_info(sdata,
35d865af
JB		 2632 "HT AP is missing WMM params or HT capability/operation\n");
2633 ret = false;
2634 goto out;
30eb1dc2
JB		 2635 }
2636
2637 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2638 (!elems.vht_cap_elem || !elems.vht_operation)) {
2639 sdata_info(sdata,
35d865af
JB		 2640 "VHT AP is missing VHT capability/operation\n");
2641 ret = false;
2642 goto out;
30eb1dc2
JB		 2643 }
2644
2a33bee2
GE		 2645 mutex_lock(&sdata->local->sta_mtx);
2646 /*
2647 * station info was already allocated and inserted before
2648 * the association and should be available to us
2649 */
7852e361 2650 sta = sta_info_get(sdata, cbss->bssid);
2a33bee2
GE		 2651 if (WARN_ON(!sta)) {
2652 mutex_unlock(&sdata->local->sta_mtx);
35d865af
JB		 2653 ret = false;
2654 goto out;
77fdaa12 2655 }
05e5e883 2656
55de908a 2657 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
f709fc69 2658
30eb1dc2 2659 /* Set up internal HT/VHT capabilities */
a8243b72 2660 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
ef96a842 2661 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
e1a0c6b3 2662 elems.ht_cap_elem, sta);
64f68e5d 2663
818255ea
MP		 2664 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2665 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
4a34215e 2666 elems.vht_cap_elem, sta);
818255ea 2667
30eb1dc2
JB		 2668 /*
2669 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
2670 * in their association response, so ignore that data for our own
2671 * configuration. If it changed since the last beacon, we'll get the
2672 * next beacon and update then.
2673 */
1128958d 2674
bee7f586
JB		 2675 /*
2676 * If an operating mode notification IE is present, override the
2677 * NSS calculation (that would be done in rate_control_rate_init())
2678 * and use the # of streams from that element.
2679 */
2680 if (elems.opmode_notif &&
2681 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
2682 u8 nss;
2683
2684 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
2685 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
2686 nss += 1;
2687 sta->sta.rx_nss = nss;
2688 }
2689
4b7679a5 2690 rate_control_rate_init(sta);
f0706e82 2691
46900298 2692 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
c2c98fde 2693 set_sta_flag(sta, WLAN_STA_MFP);
5394af4d 2694
ddf4ac53 2695 if (elems.wmm_param)
c2c98fde 2696 set_sta_flag(sta, WLAN_STA_WME);
ddf4ac53 2697
3e4d40fa 2698 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
c8987876
JB		 2699 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2700 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2701 if (err) {
bdcbd8e0
JB		 2702 sdata_info(sdata,
2703 "failed to move station %pM to desired state\n",
2704 sta->sta.addr);
c8987876
JB		 2705 WARN_ON(__sta_info_destroy(sta));
2706 mutex_unlock(&sdata->local->sta_mtx);
35d865af
JB		 2707 ret = false;
2708 goto out;
c8987876
JB		 2709 }
2710
7852e361 2711 mutex_unlock(&sdata->local->sta_mtx);
ddf4ac53 2712
f2176d72
JO		 2713 /*
2714 * Always handle WMM once after association regardless
2715 * of the first value the AP uses. Setting -1 here has
2716 * that effect because the AP values is an unsigned
2717 * 4-bit value.
2718 */
2719 ifmgd->wmm_last_param_set = -1;
2720
095d81ce 2721 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && elems.wmm_param)
4ced3f74 2722 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 2723 elems.wmm_param_len);
aa837e1d 2724 else
3abead59
JB		 2725 ieee80211_set_wmm_default(sdata, false);
2726 changed |= BSS_CHANGED_QOS;
f0706e82 2727
60f8b39c
JB		 2728 /* set AID and assoc capability,
2729 * ieee80211_set_associated() will tell the driver */
2730 bss_conf->aid = aid;
2731 bss_conf->assoc_capability = capab_info;
0c1ad2ca 2732 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 2733
d524215f
FF		 2734 /*
2735 * If we're using 4-addr mode, let the AP know that we're
2736 * doing so, so that it can create the STA VLAN on its side
2737 */
2738 if (ifmgd->use_4addr)
2739 ieee80211_send_4addr_nullfunc(local, sdata);
2740
15b7b062 2741 /*
b291ba11
JB		 2742 * Start timer to probe the connection to the AP now.
2743 * Also start the timer that will detect beacon loss.
15b7b062 2744 */
b291ba11 2745 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 2746 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 2747
35d865af
JB		 2748 ret = true;
2749 out:
2750 kfree(bss_ies);
2751 return ret;
f0706e82
JB		 2752}
2753
8d61ffa5
JB		 2754static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2755 struct ieee80211_mgmt *mgmt,
2756 size_t len)
66e67e41
JB		 2757{
2758 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2759 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2760 u16 capab_info, status_code, aid;
2761 struct ieee802_11_elems elems;
2762 u8 *pos;
2763 bool reassoc;
8d61ffa5 2764 struct cfg80211_bss *bss;
66e67e41 2765
8d61ffa5 2766 sdata_assert_lock(sdata);
66e67e41
JB		 2767
2768 if (!assoc_data)
8d61ffa5 2769 return;
b203ca39 2770 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
8d61ffa5 2771 return;
66e67e41
JB		 2772
2773 /*
2774 * AssocResp and ReassocResp have identical structure, so process both
2775 * of them in this function.
2776 */
2777
2778 if (len < 24 + 6)
8d61ffa5 2779 return;
66e67e41
JB		 2780
2781 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2782 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2783 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2784 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2785
bdcbd8e0
JB		 2786 sdata_info(sdata,
2787 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2788 reassoc ? "Rea" : "A", mgmt->sa,
2789 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
66e67e41
JB		 2790
2791 pos = mgmt->u.assoc_resp.variable;
b2e506bf 2792 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
66e67e41
JB		 2793
2794 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
79ba1d89
JB		 2795 elems.timeout_int &&
2796 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
66e67e41 2797 u32 tu, ms;
79ba1d89 2798 tu = le32_to_cpu(elems.timeout_int->value);
66e67e41 2799 ms = tu * 1024 / 1000;
bdcbd8e0
JB		 2800 sdata_info(sdata,
2801 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2802 mgmt->sa, tu, ms);
66e67e41 2803 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
89afe614 2804 assoc_data->timeout_started = true;
66e67e41 2805 if (ms > IEEE80211_ASSOC_TIMEOUT)
8d61ffa5
JB		 2806 run_again(sdata, assoc_data->timeout);
2807 return;
66e67e41
JB		 2808 }
2809
8d61ffa5 2810 bss = assoc_data->bss;
66e67e41
JB		 2811
2812 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2813 sdata_info(sdata, "%pM denied association (code=%d)\n",
2814 mgmt->sa, status_code);
66e67e41
JB		 2815 ieee80211_destroy_assoc_data(sdata, false);
2816 } else {
8d61ffa5 2817 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
66e67e41 2818 /* oops -- internal error -- send timeout for now */
10a9109f 2819 ieee80211_destroy_assoc_data(sdata, false);
959867fa 2820 cfg80211_assoc_timeout(sdata->dev, bss);
8d61ffa5 2821 return;
66e67e41 2822 }
635d999f 2823 sdata_info(sdata, "associated\n");
79ebfb85
JB		 2824
2825 /*
2826 * destroy assoc_data afterwards, as otherwise an idle
2827 * recalc after assoc_data is NULL but before associated
2828 * is set can cause the interface to go idle
2829 */
2830 ieee80211_destroy_assoc_data(sdata, true);
66e67e41
JB		 2831 }
2832
6ff57cf8 2833 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len);
66e67e41 2834}
8e3c1b77 2835
98c8fccf 2836static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
8e3c1b77 2837 struct ieee80211_mgmt *mgmt, size_t len,
98c8fccf 2838 struct ieee80211_rx_status *rx_status,
d45c4172 2839 struct ieee802_11_elems *elems)
98c8fccf
JB		 2840{
2841 struct ieee80211_local *local = sdata->local;
c2b13452 2842 struct ieee80211_bss *bss;
98c8fccf 2843 struct ieee80211_channel *channel;
56007a02 2844
8d61ffa5 2845 sdata_assert_lock(sdata);
b4f286a1 2846
3afc2167
EG		 2847 channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
2848 if (!channel)
98c8fccf
JB		 2849 return;
2850
98c8fccf 2851 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
d45c4172 2852 channel);
817cee76 2853 if (bss) {
817cee76 2854 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
d2722f8b 2855 ieee80211_rx_bss_put(local, bss);
817cee76 2856 }
f0706e82
JB		 2857}
2858
2859
f698d856 2860static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 2861 struct sk_buff *skb)
f0706e82 2862{
af6b6374 2863 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 2864 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 2865 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2866 size_t baselen, len = skb->len;
ae6a44e3
EK		 2867 struct ieee802_11_elems elems;
2868
15b7b062
KV		 2869 ifmgd = &sdata->u.mgd;
2870
8d61ffa5 2871 sdata_assert_lock(sdata);
77fdaa12 2872
b203ca39 2873 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
8e7cdbb6
TW		 2874 return; /* ignore ProbeResp to foreign address */
2875
ae6a44e3
EK		 2876 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2877 if (baselen > len)
2878 return;
2879
2880 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
b2e506bf 2881 false, &elems);
ae6a44e3 2882
d45c4172 2883 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
9859b81e 2884
77fdaa12 2885 if (ifmgd->associated &&
b203ca39 2886 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
4e5ff376 2887 ieee80211_reset_ap_probe(sdata);
66e67e41
JB		 2888
2889 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
b203ca39 2890 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
66e67e41 2891 /* got probe response, continue with auth */
bdcbd8e0 2892 sdata_info(sdata, "direct probe responded\n");
66e67e41
JB		 2893 ifmgd->auth_data->tries = 0;
2894 ifmgd->auth_data->timeout = jiffies;
89afe614 2895 ifmgd->auth_data->timeout_started = true;
8d61ffa5 2896 run_again(sdata, ifmgd->auth_data->timeout);
66e67e41 2897 }
f0706e82
JB		 2898}
2899
d91f36db
JB		 2900/*
2901 * This is the canonical list of information elements we care about,
2902 * the filter code also gives us all changes to the Microsoft OUI
2903 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2904 *
2905 * We implement beacon filtering in software since that means we can
2906 * avoid processing the frame here and in cfg80211, and userspace
2907 * will not be able to tell whether the hardware supports it or not.
2908 *
2909 * XXX: This list needs to be dynamic -- userspace needs to be able to
2910 * add items it requires. It also needs to be able to tell us to
2911 * look out for other vendor IEs.
2912 */
2913static const u64 care_about_ies =
1d4df3a5
JB		 2914 (1ULL << WLAN_EID_COUNTRY) |
2915 (1ULL << WLAN_EID_ERP_INFO) |
2916 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2917 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2918 (1ULL << WLAN_EID_HT_CAPABILITY) |
074d46d1 2919 (1ULL << WLAN_EID_HT_OPERATION);
d91f36db 2920
8d61ffa5
JB		 2921static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
2922 struct ieee80211_mgmt *mgmt, size_t len,
2923 struct ieee80211_rx_status *rx_status)
f0706e82 2924{
d91f36db 2925 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 2926 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 2927 size_t baselen;
2928 struct ieee802_11_elems elems;
f698d856 2929 struct ieee80211_local *local = sdata->local;
55de908a
JB		 2930 struct ieee80211_chanctx_conf *chanctx_conf;
2931 struct ieee80211_channel *chan;
bee7f586 2932 struct sta_info *sta;
471b3efd 2933 u32 changed = 0;
f87ad637 2934 bool erp_valid;
7a5158ef 2935 u8 erp_value = 0;
d91f36db 2936 u32 ncrc;
77fdaa12 2937 u8 *bssid;
8d61ffa5 2938 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
77fdaa12 2939
8d61ffa5 2940 sdata_assert_lock(sdata);
f0706e82 2941
ae6a44e3
EK		 2942 /* Process beacon from the current BSS */
2943 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2944 if (baselen > len)
8d61ffa5 2945 return;
ae6a44e3 2946
55de908a
JB		 2947 rcu_read_lock();
2948 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2949 if (!chanctx_conf) {
2950 rcu_read_unlock();
8d61ffa5 2951 return;
55de908a
JB		 2952 }
2953
4bf88530 2954 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
55de908a 2955 rcu_read_unlock();
8d61ffa5 2956 return;
55de908a 2957 }
4bf88530 2958 chan = chanctx_conf->def.chan;
55de908a 2959 rcu_read_unlock();
f0706e82 2960
c65dd147 2961 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
b203ca39 2962 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
66e67e41 2963 ieee802_11_parse_elems(mgmt->u.beacon.variable,
b2e506bf 2964 len - baselen, false, &elems);
77fdaa12 2965
d45c4172 2966 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
482a9c74
AB		 2967 if (elems.tim && !elems.parse_error) {
2968 const struct ieee80211_tim_ie *tim_ie = elems.tim;
2969 ifmgd->dtim_period = tim_ie->dtim_period;
2970 }
989c6505 2971 ifmgd->have_beacon = true;
c65dd147 2972 ifmgd->assoc_data->need_beacon = false;
ef429dad
JB		 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 }
66e67e41
JB		 2984 /* continue assoc process */
2985 ifmgd->assoc_data->timeout = jiffies;
89afe614 2986 ifmgd->assoc_data->timeout_started = true;
8d61ffa5
JB		 2987 run_again(sdata, ifmgd->assoc_data->timeout);
2988 return;
66e67e41 2989 }
77fdaa12 2990
66e67e41 2991 if (!ifmgd->associated ||
b203ca39 2992 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
8d61ffa5 2993 return;
66e67e41 2994 bssid = ifmgd->associated->bssid;
f0706e82 2995
17e4ec14
JM		 2996 /* Track average RSSI from the Beacon frames of the current AP */
2997 ifmgd->last_beacon_signal = rx_status->signal;
2998 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
2999 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3ba06c6f 3000 ifmgd->ave_beacon_signal = rx_status->signal * 16;
17e4ec14 3001 ifmgd->last_cqm_event_signal = 0;
391a200a 3002 ifmgd->count_beacon_signal = 1;
615f7b9b 3003 ifmgd->last_ave_beacon_signal = 0;
17e4ec14
JM		 3004 } else {
3005 ifmgd->ave_beacon_signal =
3006 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
3007 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
3008 ifmgd->ave_beacon_signal) / 16;
391a200a 3009 ifmgd->count_beacon_signal++;
17e4ec14 3010 }
615f7b9b
MV		 3011
3012 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3013 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3014 int sig = ifmgd->ave_beacon_signal;
3015 int last_sig = ifmgd->last_ave_beacon_signal;
3016
3017 /*
3018 * if signal crosses either of the boundaries, invoke callback
3019 * with appropriate parameters
3020 */
3021 if (sig > ifmgd->rssi_max_thold &&
3022 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3023 ifmgd->last_ave_beacon_signal = sig;
887da917 3024 drv_rssi_callback(local, sdata, RSSI_EVENT_HIGH);
615f7b9b
MV		 3025 } else if (sig < ifmgd->rssi_min_thold &&
3026 (last_sig >= ifmgd->rssi_max_thold ||
3027 last_sig == 0)) {
3028 ifmgd->last_ave_beacon_signal = sig;
887da917 3029 drv_rssi_callback(local, sdata, RSSI_EVENT_LOW);
615f7b9b
MV		 3030 }
3031 }
3032
17e4ec14 3033 if (bss_conf->cqm_rssi_thold &&
391a200a 3034 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
ea086359 3035 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
17e4ec14
JM		 3036 int sig = ifmgd->ave_beacon_signal / 16;
3037 int last_event = ifmgd->last_cqm_event_signal;
3038 int thold = bss_conf->cqm_rssi_thold;
3039 int hyst = bss_conf->cqm_rssi_hyst;
3040 if (sig < thold &&
3041 (last_event == 0 || sig < last_event - hyst)) {
3042 ifmgd->last_cqm_event_signal = sig;
3043 ieee80211_cqm_rssi_notify(
3044 &sdata->vif,
3045 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3046 GFP_KERNEL);
3047 } else if (sig > thold &&
3048 (last_event == 0 || sig > last_event + hyst)) {
3049 ifmgd->last_cqm_event_signal = sig;
3050 ieee80211_cqm_rssi_notify(
3051 &sdata->vif,
3052 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3053 GFP_KERNEL);
3054 }
3055 }
3056
392b9ffb 3057 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
bdcbd8e0 3058 mlme_dbg_ratelimited(sdata,
112c31f0 3059 "cancelling AP probe due to a received beacon\n");
392b9ffb 3060 ieee80211_reset_ap_probe(sdata);
92778180
JM		 3061 }
3062
b291ba11
JB		 3063 /*
3064 * Push the beacon loss detection into the future since
3065 * we are processing a beacon from the AP just now.
3066 */
d3a910a8 3067 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 3068
d91f36db
JB		 3069 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3070 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
b2e506bf 3071 len - baselen, false, &elems,
d91f36db
JB		 3072 care_about_ies, ncrc);
3073
25c9c875 3074 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
f87ad637
RR		 3075 bool directed_tim = ieee80211_check_tim(elems.tim,
3076 elems.tim_len,
3077 ifmgd->aid);
1fb3606b 3078 if (directed_tim) {
572e0012 3079 if (local->hw.conf.dynamic_ps_timeout > 0) {
70b12f26
RW		 3080 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3081 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3082 ieee80211_hw_config(local,
3083 IEEE80211_CONF_CHANGE_PS);
3084 }
572e0012 3085 ieee80211_send_nullfunc(local, sdata, 0);
6f0756a3 3086 } else if (!local->pspolling && sdata->u.mgd.powersave) {
572e0012
KV		 3087 local->pspolling = true;
3088
3089 /*
3090 * Here is assumed that the driver will be
3091 * able to send ps-poll frame and receive a
3092 * response even though power save mode is
3093 * enabled, but some drivers might require
3094 * to disable power save here. This needs
3095 * to be investigated.
3096 */
3097 ieee80211_send_pspoll(local, sdata);
3098 }
a97b77b9
VN		 3099 }
3100 }
7a5158ef 3101
488dd7b5 3102 if (sdata->vif.p2p) {
67baf663 3103 struct ieee80211_p2p_noa_attr noa = {};
488dd7b5
JB		 3104 int ret;
3105
3106 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3107 len - baselen,
3108 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
934457ee 3109 (u8 *) &noa, sizeof(noa));
67baf663
JD		 3110 if (ret >= 2) {
3111 if (sdata->u.mgd.p2p_noa_index != noa.index) {
3112 /* valid noa_attr and index changed */
3113 sdata->u.mgd.p2p_noa_index = noa.index;
3114 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3115 changed |= BSS_CHANGED_P2P_PS;
3116 /*
3117 * make sure we update all information, the CRC
3118 * mechanism doesn't look at P2P attributes.
3119 */
3120 ifmgd->beacon_crc_valid = false;
3121 }
3122 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3123 /* noa_attr not found and we had valid noa_attr before */
3124 sdata->u.mgd.p2p_noa_index = -1;
3125 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
488dd7b5 3126 changed |= BSS_CHANGED_P2P_PS;
488dd7b5
JB		 3127 ifmgd->beacon_crc_valid = false;
3128 }
3129 }
3130
d8ec4433 3131 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
8d61ffa5 3132 return;
30196673 3133 ifmgd->beacon_crc = ncrc;
d8ec4433 3134 ifmgd->beacon_crc_valid = true;
30196673 3135
d45c4172 3136 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
7d25745d 3137
d70b7616
JB		 3138 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
3139 &elems, true);
3140
095d81ce
JB		 3141 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3142 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
7d25745d
JB		 3143 elems.wmm_param_len))
3144 changed |= BSS_CHANGED_QOS;
3145
c65dd147
EG		 3146 /*
3147 * If we haven't had a beacon before, tell the driver about the
ef429dad 3148 * DTIM period (and beacon timing if desired) now.
c65dd147 3149 */
989c6505 3150 if (!ifmgd->have_beacon) {
c65dd147
EG		 3151 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3152 if (elems.tim)
3153 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3154 else
3155 bss_conf->dtim_period = 1;
ef429dad
JB		 3156
3157 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3158 sdata->vif.bss_conf.sync_tsf =
3159 le64_to_cpu(mgmt->u.beacon.timestamp);
3160 sdata->vif.bss_conf.sync_device_ts =
3161 rx_status->device_timestamp;
3162 if (elems.tim)
3163 sdata->vif.bss_conf.sync_dtim_count =
3164 elems.tim->dtim_count;
3165 else
3166 sdata->vif.bss_conf.sync_dtim_count = 0;
3167 }
3168
989c6505
AB		 3169 changed |= BSS_CHANGED_BEACON_INFO;
3170 ifmgd->have_beacon = true;
482a9c74
AB		 3171
3172 mutex_lock(&local->iflist_mtx);
3173 ieee80211_recalc_ps(local, -1);
3174 mutex_unlock(&local->iflist_mtx);
3175
ce857888 3176 ieee80211_recalc_ps_vif(sdata);
c65dd147
EG		 3177 }
3178
1946bed9 3179 if (elems.erp_info) {
7a5158ef
JB		 3180 erp_valid = true;
3181 erp_value = elems.erp_info[0];
3182 } else {
3183 erp_valid = false;
50c4afb9 3184 }
7a5158ef
JB		 3185 changed |= ieee80211_handle_bss_capability(sdata,
3186 le16_to_cpu(mgmt->u.beacon.capab_info),
3187 erp_valid, erp_value);
f0706e82 3188
1128958d 3189 mutex_lock(&local->sta_mtx);
bee7f586
JB		 3190 sta = sta_info_get(sdata, bssid);
3191
30eb1dc2
JB		 3192 if (ieee80211_config_bw(sdata, sta, elems.ht_operation,
3193 elems.vht_operation, bssid, &changed)) {
3194 mutex_unlock(&local->sta_mtx);
3195 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3196 WLAN_REASON_DEAUTH_LEAVING,
3197 true, deauth_buf);
6ff57cf8
JB		 3198 cfg80211_tx_mlme_mgmt(sdata->dev, deauth_buf,
3199 sizeof(deauth_buf));
8d61ffa5 3200 return;
30eb1dc2 3201 }
bee7f586
JB		 3202
3203 if (sta && elems.opmode_notif)
3204 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3205 rx_status->band, true);
1128958d 3206 mutex_unlock(&local->sta_mtx);
d3c990fb 3207
04b7b2ff
JB		 3208 if (elems.country_elem && elems.pwr_constr_elem &&
3209 mgmt->u.probe_resp.capab_info &
3210 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT))
1ea6f9c0
JB		 3211 changed |= ieee80211_handle_pwr_constr(sdata, chan,
3212 elems.country_elem,
3213 elems.country_elem_len,
3214 elems.pwr_constr_elem);
3f2355cb 3215
471b3efd 3216 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 3217}
3218
1fa57d01
JB		 3219void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3220 struct sk_buff *skb)
f0706e82
JB		 3221{
3222 struct ieee80211_rx_status *rx_status;
f0706e82
JB		 3223 struct ieee80211_mgmt *mgmt;
3224 u16 fc;
1b3a2e49
JB		 3225 struct ieee802_11_elems elems;
3226 int ies_len;
f0706e82 3227
f0706e82
JB		 3228 rx_status = (struct ieee80211_rx_status *) skb->cb;
3229 mgmt = (struct ieee80211_mgmt *) skb->data;
3230 fc = le16_to_cpu(mgmt->frame_control);
3231
8d61ffa5 3232 sdata_lock(sdata);
77fdaa12 3233
66e67e41
JB		 3234 switch (fc & IEEE80211_FCTL_STYPE) {
3235 case IEEE80211_STYPE_BEACON:
8d61ffa5 3236 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
66e67e41
JB		 3237 break;
3238 case IEEE80211_STYPE_PROBE_RESP:
3239 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3240 break;
3241 case IEEE80211_STYPE_AUTH:
8d61ffa5 3242 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
66e67e41
JB		 3243 break;
3244 case IEEE80211_STYPE_DEAUTH:
8d61ffa5 3245 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
66e67e41
JB		 3246 break;
3247 case IEEE80211_STYPE_DISASSOC:
8d61ffa5 3248 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
66e67e41
JB		 3249 break;
3250 case IEEE80211_STYPE_ASSOC_RESP:
3251 case IEEE80211_STYPE_REASSOC_RESP:
8d61ffa5 3252 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
66e67e41
JB		 3253 break;
3254 case IEEE80211_STYPE_ACTION:
37799e52 3255 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
1b3a2e49
JB		 3256 ies_len = skb->len -
3257 offsetof(struct ieee80211_mgmt,
3258 u.action.u.chan_switch.variable);
37799e52
JB		 3259
3260 if (ies_len < 0)
3261 break;
3262
3263 ieee802_11_parse_elems(
3264 mgmt->u.action.u.chan_switch.variable,
b2e506bf 3265 ies_len, true, &elems);
37799e52
JB		 3266
3267 if (elems.parse_error)
3268 break;
3269
1b3a2e49
JB		 3270 ieee80211_sta_process_chanswitch(sdata,
3271 rx_status->mactime,
04a161f4 3272 &elems, false);
1b3a2e49
JB		 3273 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3274 ies_len = skb->len -
3275 offsetof(struct ieee80211_mgmt,
3276 u.action.u.ext_chan_switch.variable);
3277
3278 if (ies_len < 0)
3279 break;
3280
3281 ieee802_11_parse_elems(
3282 mgmt->u.action.u.ext_chan_switch.variable,
b2e506bf 3283 ies_len, true, &elems);
1b3a2e49
JB		 3284
3285 if (elems.parse_error)
3286 break;
3287
3288 /* for the handling code pretend this was also an IE */
3289 elems.ext_chansw_ie =
3290 &mgmt->u.action.u.ext_chan_switch.data;
3291
66e67e41 3292 ieee80211_sta_process_chanswitch(sdata,
37799e52 3293 rx_status->mactime,
04a161f4 3294 &elems, false);
77fdaa12 3295 }
37799e52 3296 break;
77fdaa12 3297 }
8d61ffa5 3298 sdata_unlock(sdata);
f0706e82
JB		 3299}
3300
9c6bd790 3301static void ieee80211_sta_timer(unsigned long data)
f0706e82 3302{
60f8b39c
JB		 3303 struct ieee80211_sub_if_data *sdata =
3304 (struct ieee80211_sub_if_data *) data;
5bb644a0 3305
9b7d72c1 3306 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
f0706e82
JB		 3307}
3308
04ac3c0e 3309static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
6b684db1 3310 u8 *bssid, u8 reason, bool tx)
04ac3c0e 3311{
6ae16775 3312 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
04ac3c0e 3313
37ad3888 3314 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
6b684db1 3315 tx, frame_buf);
37ad3888 3316
6ff57cf8
JB		 3317 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3318 IEEE80211_DEAUTH_FRAME_LEN);
04ac3c0e
FF		 3319}
3320
66e67e41
JB		 3321static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
3322{
3323 struct ieee80211_local *local = sdata->local;
3324 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3325 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
1672c0e3 3326 u32 tx_flags = 0;
66e67e41 3327
8d61ffa5 3328 sdata_assert_lock(sdata);
66e67e41
JB		 3329
3330 if (WARN_ON_ONCE(!auth_data))
3331 return -EINVAL;
3332
66e67e41
JB		 3333 auth_data->tries++;
3334
3335 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
bdcbd8e0
JB		 3336 sdata_info(sdata, "authentication with %pM timed out\n",
3337 auth_data->bss->bssid);
66e67e41
JB		 3338
3339 /*
3340 * Most likely AP is not in the range so remove the
3341 * bss struct for that AP.
3342 */
3343 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3344
3345 return -ETIMEDOUT;
3346 }
3347
a1845fc7
JB		 3348 drv_mgd_prepare_tx(local, sdata);
3349
66e67e41 3350 if (auth_data->bss->proberesp_ies) {
6b8ece3a
JM		 3351 u16 trans = 1;
3352 u16 status = 0;
3353
bdcbd8e0
JB		 3354 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3355 auth_data->bss->bssid, auth_data->tries,
3356 IEEE80211_AUTH_MAX_TRIES);
66e67e41
JB		 3357
3358 auth_data->expected_transaction = 2;
6b8ece3a
JM		 3359
3360 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3361 trans = auth_data->sae_trans;
3362 status = auth_data->sae_status;
3363 auth_data->expected_transaction = trans;
3364 }
3365
6211dd12
SG		 3366 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3367 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3368 IEEE80211_TX_INTFL_MLME_CONN_TX;
3369
6b8ece3a
JM		 3370 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3371 auth_data->data, auth_data->data_len,
66e67e41 3372 auth_data->bss->bssid,
1672c0e3
JB		 3373 auth_data->bss->bssid, NULL, 0, 0,
3374 tx_flags);
66e67e41
JB		 3375 } else {
3376 const u8 *ssidie;
3377
bdcbd8e0
JB		 3378 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
3379 auth_data->bss->bssid, auth_data->tries,
3380 IEEE80211_AUTH_MAX_TRIES);
66e67e41 3381
9caf0364 3382 rcu_read_lock();
66e67e41 3383 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
9caf0364
JB		 3384 if (!ssidie) {
3385 rcu_read_unlock();
66e67e41 3386 return -EINVAL;
9caf0364 3387 }
66e67e41
JB		 3388 /*
3389 * Direct probe is sent to broadcast address as some APs
3390 * will not answer to direct packet in unassociated state.
3391 */
3392 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
6211dd12 3393 NULL, 0, (u32) -1, true, 0,
55de908a 3394 auth_data->bss->channel, false);
9caf0364 3395 rcu_read_unlock();
66e67e41
JB		 3396 }
3397
6211dd12 3398 if (tx_flags == 0) {
1672c0e3 3399 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
cb236d2d 3400 auth_data->timeout_started = true;
8d61ffa5 3401 run_again(sdata, auth_data->timeout);
89afe614 3402 } else {
cb236d2d
JB		 3403 auth_data->timeout =
3404 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3405 auth_data->timeout_started = true;
3406 run_again(sdata, auth_data->timeout);
1672c0e3 3407 }
66e67e41
JB		 3408
3409 return 0;
3410}
3411
3412static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3413{
3414 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3415 struct ieee80211_local *local = sdata->local;
3416
8d61ffa5 3417 sdata_assert_lock(sdata);
66e67e41 3418
66e67e41
JB		 3419 assoc_data->tries++;
3420 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
bdcbd8e0
JB		 3421 sdata_info(sdata, "association with %pM timed out\n",
3422 assoc_data->bss->bssid);
66e67e41
JB		 3423
3424 /*
3425 * Most likely AP is not in the range so remove the
3426 * bss struct for that AP.
3427 */
3428 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3429
3430 return -ETIMEDOUT;
3431 }
3432
bdcbd8e0
JB		 3433 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3434 assoc_data->bss->bssid, assoc_data->tries,
3435 IEEE80211_ASSOC_MAX_TRIES);
66e67e41
JB		 3436 ieee80211_send_assoc(sdata);
3437
1672c0e3
JB		 3438 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
3439 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
89afe614 3440 assoc_data->timeout_started = true;
8d61ffa5 3441 run_again(sdata, assoc_data->timeout);
89afe614 3442 } else {
cb236d2d
JB		 3443 assoc_data->timeout =
3444 round_jiffies_up(jiffies +
3445 IEEE80211_ASSOC_TIMEOUT_LONG);
3446 assoc_data->timeout_started = true;
3447 run_again(sdata, assoc_data->timeout);
1672c0e3 3448 }
66e67e41
JB		 3449
3450 return 0;
3451}
3452
1672c0e3
JB		 3453void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3454 __le16 fc, bool acked)
3455{
3456 struct ieee80211_local *local = sdata->local;
3457
3458 sdata->u.mgd.status_fc = fc;
3459 sdata->u.mgd.status_acked = acked;
3460 sdata->u.mgd.status_received = true;
3461
3462 ieee80211_queue_work(&local->hw, &sdata->work);
3463}
3464
1fa57d01 3465void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 3466{
9c6bd790 3467 struct ieee80211_local *local = sdata->local;
1fa57d01 3468 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 3469
8d61ffa5 3470 sdata_lock(sdata);
77fdaa12 3471
1672c0e3
JB		 3472 if (ifmgd->status_received) {
3473 __le16 fc = ifmgd->status_fc;
3474 bool status_acked = ifmgd->status_acked;
3475
3476 ifmgd->status_received = false;
3477 if (ifmgd->auth_data &&
3478 (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) {
3479 if (status_acked) {
3480 ifmgd->auth_data->timeout =
3481 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
8d61ffa5 3482 run_again(sdata, ifmgd->auth_data->timeout);
1672c0e3
JB		 3483 } else {
3484 ifmgd->auth_data->timeout = jiffies - 1;
3485 }
89afe614 3486 ifmgd->auth_data->timeout_started = true;
1672c0e3
JB		 3487 } else if (ifmgd->assoc_data &&
3488 (ieee80211_is_assoc_req(fc) ||
3489 ieee80211_is_reassoc_req(fc))) {
3490 if (status_acked) {
3491 ifmgd->assoc_data->timeout =
3492 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
8d61ffa5 3493 run_again(sdata, ifmgd->assoc_data->timeout);
1672c0e3
JB		 3494 } else {
3495 ifmgd->assoc_data->timeout = jiffies - 1;
3496 }
89afe614 3497 ifmgd->assoc_data->timeout_started = true;
1672c0e3
JB		 3498 }
3499 }
3500
89afe614 3501 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
66e67e41
JB		 3502 time_after(jiffies, ifmgd->auth_data->timeout)) {
3503 if (ifmgd->auth_data->done) {
3504 /*
3505 * ok ... we waited for assoc but userspace didn't,
3506 * so let's just kill the auth data
3507 */
3508 ieee80211_destroy_auth_data(sdata, false);
3509 } else if (ieee80211_probe_auth(sdata)) {
3510 u8 bssid[ETH_ALEN];
3511
3512 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3513
3514 ieee80211_destroy_auth_data(sdata, false);
3515
6ff57cf8 3516 cfg80211_auth_timeout(sdata->dev, bssid);
66e67e41 3517 }
89afe614 3518 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
8d61ffa5 3519 run_again(sdata, ifmgd->auth_data->timeout);
66e67e41 3520
89afe614 3521 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
66e67e41 3522 time_after(jiffies, ifmgd->assoc_data->timeout)) {
989c6505 3523 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
66e67e41 3524 ieee80211_do_assoc(sdata)) {
959867fa 3525 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
66e67e41
JB		 3526
3527 ieee80211_destroy_assoc_data(sdata, false);
959867fa 3528 cfg80211_assoc_timeout(sdata->dev, bss);
66e67e41 3529 }
89afe614 3530 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
8d61ffa5 3531 run_again(sdata, ifmgd->assoc_data->timeout);
66e67e41 3532
392b9ffb 3533 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
b291ba11 3534 ifmgd->associated) {
a43abf29 3535 u8 bssid[ETH_ALEN];
72a8a3ed 3536 int max_tries;
a43abf29 3537
0c1ad2ca 3538 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 3539
72a8a3ed 3540 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
180205bd 3541 max_tries = max_nullfunc_tries;
72a8a3ed 3542 else
180205bd 3543 max_tries = max_probe_tries;
72a8a3ed 3544
4e5ff376
FF		 3545 /* ACK received for nullfunc probing frame */
3546 if (!ifmgd->probe_send_count)
3547 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 3548 else if (ifmgd->nullfunc_failed) {
3549 if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3550 mlme_dbg(sdata,
3551 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3552 bssid, ifmgd->probe_send_count,
3553 max_tries);
04ac3c0e
FF		 3554 ieee80211_mgd_probe_ap_send(sdata);
3555 } else {
bdcbd8e0
JB		 3556 mlme_dbg(sdata,
3557 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3558 bssid);
95acac61 3559 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1
JB		 3560 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3561 false);
04ac3c0e
FF		 3562 }
3563 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
8d61ffa5 3564 run_again(sdata, ifmgd->probe_timeout);
04ac3c0e 3565 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
bdcbd8e0
JB		 3566 mlme_dbg(sdata,
3567 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3568 bssid, probe_wait_ms);
95acac61 3569 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 3570 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
04ac3c0e 3571 } else if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3572 mlme_dbg(sdata,
3573 "No probe response from AP %pM after %dms, try %d/%i\n",
3574 bssid, probe_wait_ms,
3575 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 3576 ieee80211_mgd_probe_ap_send(sdata);
3577 } else {
b291ba11
JB		 3578 /*
3579 * We actually lost the connection ... or did we?
3580 * Let's make sure!
3581 */
b38afa87
BG		 3582 wiphy_debug(local->hw.wiphy,
3583 "%s: No probe response from AP %pM"
3584 " after %dms, disconnecting.\n",
3585 sdata->name,
180205bd 3586 bssid, probe_wait_ms);
04ac3c0e 3587
95acac61 3588 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 3589 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
b291ba11
JB		 3590 }
3591 }
3592
8d61ffa5 3593 sdata_unlock(sdata);
f0706e82
JB		 3594}
3595
b291ba11
JB		 3596static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3597{
3598 struct ieee80211_sub_if_data *sdata =
3599 (struct ieee80211_sub_if_data *) data;
3600 struct ieee80211_local *local = sdata->local;
3601
3602 if (local->quiescing)
3603 return;
3604
e5593f56
MK		 3605 if (sdata->vif.csa_active)
3606 return;
3607
682bd38b 3608 sdata->u.mgd.connection_loss = false;
1e4dcd01
JO		 3609 ieee80211_queue_work(&sdata->local->hw,
3610 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 3611}
3612
3613static void ieee80211_sta_conn_mon_timer(unsigned long data)
3614{
3615 struct ieee80211_sub_if_data *sdata =
3616 (struct ieee80211_sub_if_data *) data;
3617 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3618 struct ieee80211_local *local = sdata->local;
3619
3620 if (local->quiescing)
3621 return;
3622
e5593f56
MK		 3623 if (sdata->vif.csa_active)
3624 return;
3625
42935eca 3626 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 3627}
3628
3629static void ieee80211_sta_monitor_work(struct work_struct *work)
3630{
3631 struct ieee80211_sub_if_data *sdata =
3632 container_of(work, struct ieee80211_sub_if_data,
3633 u.mgd.monitor_work);
3634
3635 ieee80211_mgd_probe_ap(sdata, false);
3636}
3637
9c6bd790
JB		 3638static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3639{
494f1fe5
EP		 3640 u32 flags;
3641
ad935687 3642 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
925e64c3 3643 __ieee80211_stop_poll(sdata);
ad935687 3644
b291ba11 3645 /* let's probe the connection once */
494f1fe5
EP		 3646 flags = sdata->local->hw.flags;
3647 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3648 ieee80211_queue_work(&sdata->local->hw,
3649 &sdata->u.mgd.monitor_work);
b291ba11 3650 /* and do all the other regular work too */
64592c8f 3651 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 3652 }
9c6bd790 3653}
f0706e82 3654
b8360ab8 3655#ifdef CONFIG_PM
1a1cb744
JB		 3656void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
3657{
3658 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3659 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3660
3661 sdata_lock(sdata);
3662
c52666ae
EG		 3663 if (ifmgd->auth_data || ifmgd->assoc_data) {
3664 const u8 *bssid = ifmgd->auth_data ?
3665 ifmgd->auth_data->bss->bssid :
3666 ifmgd->assoc_data->bss->bssid;
3667
1a1cb744 3668 /*
c52666ae
EG		 3669 * If we are trying to authenticate / associate while suspending,
3670 * cfg80211 won't know and won't actually abort those attempts,
3671 * thus we need to do that ourselves.
1a1cb744 3672 */
c52666ae 3673 ieee80211_send_deauth_disassoc(sdata, bssid,
1a1cb744
JB		 3674 IEEE80211_STYPE_DEAUTH,
3675 WLAN_REASON_DEAUTH_LEAVING,
3676 false, frame_buf);
c52666ae
EG		 3677 if (ifmgd->assoc_data)
3678 ieee80211_destroy_assoc_data(sdata, false);
3679 if (ifmgd->auth_data)
3680 ieee80211_destroy_auth_data(sdata, false);
1a1cb744
JB		 3681 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3682 IEEE80211_DEAUTH_FRAME_LEN);
3683 }
3684
3685 sdata_unlock(sdata);
3686}
3687
b8360ab8
JB		 3688void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
3689{
3690 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3691
8d61ffa5 3692 sdata_lock(sdata);
b8360ab8 3693 if (!ifmgd->associated) {
8d61ffa5 3694 sdata_unlock(sdata);
b8360ab8
JB		 3695 return;
3696 }
3697
3698 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
3699 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
3700 mlme_dbg(sdata, "driver requested disconnect after resume\n");
3701 ieee80211_sta_connection_lost(sdata,
3702 ifmgd->associated->bssid,
3703 WLAN_REASON_UNSPECIFIED,
3704 true);
8d61ffa5 3705 sdata_unlock(sdata);
b8360ab8
JB		 3706 return;
3707 }
8d61ffa5 3708 sdata_unlock(sdata);
b8360ab8
JB		 3709}
3710#endif
3711
9c6bd790
JB		 3712/* interface setup */
3713void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 3714{
46900298 3715 struct ieee80211_if_managed *ifmgd;
988c0f72 3716
46900298 3717 ifmgd = &sdata->u.mgd;
b291ba11 3718 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 3719 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 3720 INIT_WORK(&ifmgd->beacon_connection_loss_work,
3721 ieee80211_beacon_connection_loss_work);
882a7c69
JB		 3722 INIT_WORK(&ifmgd->csa_connection_drop_work,
3723 ieee80211_csa_connection_drop_work);
687da132 3724 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
46900298 3725 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 3726 (unsigned long) sdata);
b291ba11
JB		 3727 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
3728 (unsigned long) sdata);
3729 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
3730 (unsigned long) sdata);
46900298 3731 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 3732 (unsigned long) sdata);
9c6bd790 3733
ab1faead 3734 ifmgd->flags = 0;
1478acb3 3735 ifmgd->powersave = sdata->wdev.ps;
219c3867
AB		 3736 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
3737 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
67baf663 3738 ifmgd->p2p_noa_index = -1;
bbbdff9e 3739
0f78231b
JB		 3740 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
3741 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
3742 else
3743 ifmgd->req_smps = IEEE80211_SMPS_OFF;
f0706e82
JB		 3744}
3745
77fdaa12
JB		 3746/* scan finished notification */
3747void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 3748{
31ee67a1 3749 struct ieee80211_sub_if_data *sdata;
60f8b39c 3750
77fdaa12
JB		 3751 /* Restart STA timers */
3752 rcu_read_lock();
370bd005
BG		 3753 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3754 if (ieee80211_sdata_running(sdata))
3755 ieee80211_restart_sta_timer(sdata);
3756 }
77fdaa12
JB		 3757 rcu_read_unlock();
3758}
60f8b39c 3759
77fdaa12
JB		 3760int ieee80211_max_network_latency(struct notifier_block *nb,
3761 unsigned long data, void *dummy)
3762{
3763 s32 latency_usec = (s32) data;
3764 struct ieee80211_local *local =
3765 container_of(nb, struct ieee80211_local,
3766 network_latency_notifier);
1fa6f4af 3767
77fdaa12
JB		 3768 mutex_lock(&local->iflist_mtx);
3769 ieee80211_recalc_ps(local, latency_usec);
3770 mutex_unlock(&local->iflist_mtx);
dfe67012 3771
8bd811aa 3772 return NOTIFY_OK;
9c6bd790
JB		 3773}
3774
f2d9d270
JB		 3775static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
3776 struct cfg80211_bss *cbss)
3777{
3778 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3779 const u8 *ht_cap_ie, *vht_cap_ie;
3780 const struct ieee80211_ht_cap *ht_cap;
3781 const struct ieee80211_vht_cap *vht_cap;
3782 u8 chains = 1;
3783
3784 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
3785 return chains;
3786
9caf0364 3787 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
f2d9d270
JB		 3788 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
3789 ht_cap = (void *)(ht_cap_ie + 2);
3790 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
3791 /*
3792 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
3793 * "Tx Unequal Modulation Supported" fields.
3794 */
3795 }
3796
3797 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
3798 return chains;
3799
9caf0364 3800 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
f2d9d270
JB		 3801 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
3802 u8 nss;
3803 u16 tx_mcs_map;
3804
3805 vht_cap = (void *)(vht_cap_ie + 2);
3806 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
3807 for (nss = 8; nss > 0; nss--) {
3808 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
3809 IEEE80211_VHT_MCS_NOT_SUPPORTED)
3810 break;
3811 }
3812 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
3813 chains = max(chains, nss);
3814 }
3815
3816 return chains;
3817}
3818
b17166a7
JB		 3819static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
3820 struct cfg80211_bss *cbss)
a1cf775d
JB		 3821{
3822 struct ieee80211_local *local = sdata->local;
3823 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
24398e39 3824 const struct ieee80211_ht_operation *ht_oper = NULL;
f2d9d270 3825 const struct ieee80211_vht_operation *vht_oper = NULL;
24398e39 3826 struct ieee80211_supported_band *sband;
4bf88530 3827 struct cfg80211_chan_def chandef;
f2d9d270 3828 int ret;
a1cf775d 3829
24398e39
JB		 3830 sband = local->hw.wiphy->bands[cbss->channel->band];
3831
f2d9d270
JB		 3832 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
3833 IEEE80211_STA_DISABLE_80P80MHZ |
3834 IEEE80211_STA_DISABLE_160MHZ);
3835
9caf0364
JB		 3836 rcu_read_lock();
3837
f2d9d270
JB		 3838 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3839 sband->ht_cap.ht_supported) {
08e6effa 3840 const u8 *ht_oper_ie, *ht_cap;
24398e39 3841
9caf0364 3842 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
24398e39
JB		 3843 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3844 ht_oper = (void *)(ht_oper_ie + 2);
08e6effa
JB		 3845
3846 ht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
3847 if (!ht_cap || ht_cap[1] < sizeof(struct ieee80211_ht_cap)) {
3848 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3849 ht_oper = NULL;
3850 }
24398e39
JB		 3851 }
3852
f2d9d270
JB		 3853 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3854 sband->vht_cap.vht_supported) {
08e6effa 3855 const u8 *vht_oper_ie, *vht_cap;
f2d9d270 3856
9caf0364
JB		 3857 vht_oper_ie = ieee80211_bss_get_ie(cbss,
3858 WLAN_EID_VHT_OPERATION);
f2d9d270
JB		 3859 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
3860 vht_oper = (void *)(vht_oper_ie + 2);
3861 if (vht_oper && !ht_oper) {
3862 vht_oper = NULL;
bdcbd8e0 3863 sdata_info(sdata,
f2d9d270 3864 "AP advertised VHT without HT, disabling both\n");
cb145022
JB		 3865 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3866 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
24398e39 3867 }
08e6effa
JB		 3868
3869 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
3870 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
3871 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3872 vht_oper = NULL;
3873 }
24398e39
JB		 3874 }
3875
f2d9d270
JB		 3876 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
3877 cbss->channel,
3878 ht_oper, vht_oper,
5cdaed1e 3879 &chandef, false);
04ecd257 3880
f2d9d270
JB		 3881 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
3882 local->rx_chains);
24398e39 3883
9caf0364
JB		 3884 rcu_read_unlock();
3885
04ecd257
JB		 3886 /* will change later if needed */
3887 sdata->smps_mode = IEEE80211_SMPS_OFF;
3888
34a3740d 3889 mutex_lock(&local->mtx);
f2d9d270
JB		 3890 /*
3891 * If this fails (possibly due to channel context sharing
3892 * on incompatible channels, e.g. 80+80 and 160 sharing the
3893 * same control channel) try to use a smaller bandwidth.
3894 */
3895 ret = ieee80211_vif_use_channel(sdata, &chandef,
3896 IEEE80211_CHANCTX_SHARED);
0418a445
SW		 3897
3898 /* don't downgrade for 5 and 10 MHz channels, though. */
3899 if (chandef.width == NL80211_CHAN_WIDTH_5 ||
3900 chandef.width == NL80211_CHAN_WIDTH_10)
34a3740d 3901 goto out;
0418a445 3902
d601cd8d 3903 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
e6b7cde4 3904 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
d601cd8d
JB		 3905 ret = ieee80211_vif_use_channel(sdata, &chandef,
3906 IEEE80211_CHANCTX_SHARED);
3907 }
34a3740d
JB		 3908 out:
3909 mutex_unlock(&local->mtx);
f2d9d270 3910 return ret;
b17166a7
JB		 3911}
3912
3913static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
3914 struct cfg80211_bss *cbss, bool assoc)
3915{
3916 struct ieee80211_local *local = sdata->local;
3917 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3918 struct ieee80211_bss *bss = (void *)cbss->priv;
3919 struct sta_info *new_sta = NULL;
3920 bool have_sta = false;
3921 int err;
3922
3923 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3924 return -EINVAL;
3925
3926 if (assoc) {
3927 rcu_read_lock();
3928 have_sta = sta_info_get(sdata, cbss->bssid);
3929 rcu_read_unlock();
3930 }
3931
3932 if (!have_sta) {
3933 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
3934 if (!new_sta)
3935 return -ENOMEM;
3936 }
13e0c8e3 3937 if (new_sta) {
5d6a1b06
JB		 3938 u32 rates = 0, basic_rates = 0;
3939 bool have_higher_than_11mbit;
3940 int min_rate = INT_MAX, min_rate_index = -1;
2103dec1 3941 struct ieee80211_chanctx_conf *chanctx_conf;
b17166a7 3942 struct ieee80211_supported_band *sband;
8cef2c9d 3943 const struct cfg80211_bss_ies *ies;
2103dec1
SW		 3944 int shift;
3945 u32 rate_flags;
b17166a7
JB		 3946
3947 sband = local->hw.wiphy->bands[cbss->channel->band];
3948
3949 err = ieee80211_prep_channel(sdata, cbss);
3950 if (err) {
3951 sta_info_free(local, new_sta);
2103dec1 3952 return -EINVAL;
b17166a7 3953 }
2103dec1
SW		 3954 shift = ieee80211_vif_get_shift(&sdata->vif);
3955
3956 rcu_read_lock();
3957 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3958 if (WARN_ON(!chanctx_conf)) {
3959 rcu_read_unlock();
c368ddaa 3960 sta_info_free(local, new_sta);
2103dec1
SW		 3961 return -EINVAL;
3962 }
3963 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
3964 rcu_read_unlock();
5d6a1b06 3965
5d6a1b06
JB		 3966 ieee80211_get_rates(sband, bss->supp_rates,
3967 bss->supp_rates_len,
3968 &rates, &basic_rates,
3969 &have_higher_than_11mbit,
2103dec1
SW		 3970 &min_rate, &min_rate_index,
3971 shift, rate_flags);
5d6a1b06
JB		 3972
3973 /*
3974 * This used to be a workaround for basic rates missing
3975 * in the association response frame. Now that we no
3976 * longer use the basic rates from there, it probably
3977 * doesn't happen any more, but keep the workaround so
3978 * in case some *other* APs are buggy in different ways
3979 * we can connect -- with a warning.
3980 */
3981 if (!basic_rates && min_rate_index >= 0) {
bdcbd8e0
JB		 3982 sdata_info(sdata,
3983 "No basic rates, using min rate instead\n");
5d6a1b06
JB		 3984 basic_rates = BIT(min_rate_index);
3985 }
3986
13e0c8e3 3987 new_sta->sta.supp_rates[cbss->channel->band] = rates;
5d6a1b06
JB		 3988 sdata->vif.bss_conf.basic_rates = basic_rates;
3989
3990 /* cf. IEEE 802.11 9.2.12 */
55de908a 3991 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
5d6a1b06
JB		 3992 have_higher_than_11mbit)
3993 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3994 else
3995 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
3996
3997 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
3998
8c358bcd
JB		 3999 /* set timing information */
4000 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
8cef2c9d 4001 rcu_read_lock();
ef429dad
JB		 4002 ies = rcu_dereference(cbss->beacon_ies);
4003 if (ies) {
4004 const u8 *tim_ie;
4005
4006 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4007 sdata->vif.bss_conf.sync_device_ts =
4008 bss->device_ts_beacon;
4009 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4010 ies->data, ies->len);
4011 if (tim_ie && tim_ie[1] >= 2)
4012 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
4013 else
4014 sdata->vif.bss_conf.sync_dtim_count = 0;
4015 } else if (!(local->hw.flags &
4016 IEEE80211_HW_TIMING_BEACON_ONLY)) {
4017 ies = rcu_dereference(cbss->proberesp_ies);
4018 /* must be non-NULL since beacon IEs were NULL */
4019 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4020 sdata->vif.bss_conf.sync_device_ts =
4021 bss->device_ts_presp;
4022 sdata->vif.bss_conf.sync_dtim_count = 0;
4023 } else {
4024 sdata->vif.bss_conf.sync_tsf = 0;
4025 sdata->vif.bss_conf.sync_device_ts = 0;
4026 sdata->vif.bss_conf.sync_dtim_count = 0;
4027 }
8cef2c9d 4028 rcu_read_unlock();
8c358bcd
JB		 4029
4030 /* tell driver about BSSID, basic rates and timing */
5d6a1b06 4031 ieee80211_bss_info_change_notify(sdata,
8c358bcd
JB		 4032 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4033 BSS_CHANGED_BEACON_INT);
a1cf775d
JB		 4034
4035 if (assoc)
13e0c8e3 4036 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
a1cf775d 4037
13e0c8e3
JB		 4038 err = sta_info_insert(new_sta);
4039 new_sta = NULL;
a1cf775d 4040 if (err) {
bdcbd8e0
JB		 4041 sdata_info(sdata,
4042 "failed to insert STA entry for the AP (error %d)\n",
4043 err);
a1cf775d
JB		 4044 return err;
4045 }
4046 } else
b203ca39 4047 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
a1cf775d
JB		 4048
4049 return 0;
4050}
4051
77fdaa12
JB		 4052/* config hooks */
4053int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4054 struct cfg80211_auth_request *req)
9c6bd790 4055{
66e67e41
JB		 4056 struct ieee80211_local *local = sdata->local;
4057 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4058 struct ieee80211_mgd_auth_data *auth_data;
77fdaa12 4059 u16 auth_alg;
66e67e41
JB		 4060 int err;
4061
4062 /* prepare auth data structure */
9c6bd790 4063
77fdaa12
JB		 4064 switch (req->auth_type) {
4065 case NL80211_AUTHTYPE_OPEN_SYSTEM:
4066 auth_alg = WLAN_AUTH_OPEN;
4067 break;
4068 case NL80211_AUTHTYPE_SHARED_KEY:
66e67e41 4069 if (IS_ERR(local->wep_tx_tfm))
9dca9c49 4070 return -EOPNOTSUPP;
77fdaa12
JB		 4071 auth_alg = WLAN_AUTH_SHARED_KEY;
4072 break;
4073 case NL80211_AUTHTYPE_FT:
4074 auth_alg = WLAN_AUTH_FT;
4075 break;
4076 case NL80211_AUTHTYPE_NETWORK_EAP:
4077 auth_alg = WLAN_AUTH_LEAP;
4078 break;
6b8ece3a
JM		 4079 case NL80211_AUTHTYPE_SAE:
4080 auth_alg = WLAN_AUTH_SAE;
4081 break;
77fdaa12
JB		 4082 default:
4083 return -EOPNOTSUPP;
60f8b39c 4084 }
77fdaa12 4085
6b8ece3a
JM		 4086 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
4087 req->ie_len, GFP_KERNEL);
66e67e41 4088 if (!auth_data)
9c6bd790 4089 return -ENOMEM;
77fdaa12 4090
66e67e41 4091 auth_data->bss = req->bss;
77fdaa12 4092
6b8ece3a
JM		 4093 if (req->sae_data_len >= 4) {
4094 __le16 *pos = (__le16 *) req->sae_data;
4095 auth_data->sae_trans = le16_to_cpu(pos[0]);
4096 auth_data->sae_status = le16_to_cpu(pos[1]);
4097 memcpy(auth_data->data, req->sae_data + 4,
4098 req->sae_data_len - 4);
4099 auth_data->data_len += req->sae_data_len - 4;
4100 }
4101
77fdaa12 4102 if (req->ie && req->ie_len) {
6b8ece3a
JM		 4103 memcpy(&auth_data->data[auth_data->data_len],
4104 req->ie, req->ie_len);
4105 auth_data->data_len += req->ie_len;
9c6bd790 4106 }
77fdaa12 4107
fffd0934 4108 if (req->key && req->key_len) {
66e67e41
JB		 4109 auth_data->key_len = req->key_len;
4110 auth_data->key_idx = req->key_idx;
4111 memcpy(auth_data->key, req->key, req->key_len);
fffd0934
JB		 4112 }
4113
66e67e41 4114 auth_data->algorithm = auth_alg;
60f8b39c 4115
66e67e41 4116 /* try to authenticate/probe */
2a33bee2 4117
66e67e41
JB		 4118 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4119 ifmgd->assoc_data) {
4120 err = -EBUSY;
4121 goto err_free;
2a33bee2
GE		 4122 }
4123
66e67e41
JB		 4124 if (ifmgd->auth_data)
4125 ieee80211_destroy_auth_data(sdata, false);
2a33bee2 4126
66e67e41
JB		 4127 /* prep auth_data so we don't go into idle on disassoc */
4128 ifmgd->auth_data = auth_data;
af6b6374 4129
7b119dc0
JB		 4130 if (ifmgd->associated) {
4131 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4132
4133 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4134 WLAN_REASON_UNSPECIFIED,
4135 false, frame_buf);
4136
6ff57cf8
JB		 4137 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4138 sizeof(frame_buf));
7b119dc0 4139 }
af6b6374 4140
bdcbd8e0 4141 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
e5b900d2 4142
a1cf775d
JB		 4143 err = ieee80211_prep_connection(sdata, req->bss, false);
4144 if (err)
66e67e41 4145 goto err_clear;
af6b6374 4146
66e67e41
JB		 4147 err = ieee80211_probe_auth(sdata);
4148 if (err) {
66e67e41
JB		 4149 sta_info_destroy_addr(sdata, req->bss->bssid);
4150 goto err_clear;
4151 }
4152
4153 /* hold our own reference */
5b112d3d 4154 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
8d61ffa5 4155 return 0;
66e67e41
JB		 4156
4157 err_clear:
3d2abdfd
EP		 4158 memset(ifmgd->bssid, 0, ETH_ALEN);
4159 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 4160 ifmgd->auth_data = NULL;
4161 err_free:
4162 kfree(auth_data);
66e67e41 4163 return err;
af6b6374
JB		 4164}
4165
095d81ce
JB		 4166static bool ieee80211_usable_wmm_params(struct ieee80211_sub_if_data *sdata,
4167 const u8 *wmm_param, int len)
4168{
4169 const u8 *pos;
4170 size_t left;
4171
4172 if (len < 8)
4173 return false;
4174
4175 if (wmm_param[5] != 1 /* version */)
4176 return false;
4177
4178 pos = wmm_param + 8;
4179 left = len - 8;
4180
4181 for (; left >= 4; left -= 4, pos += 4) {
4182 u8 aifsn = pos[0] & 0x0f;
4183 u8 ecwmin = pos[1] & 0x0f;
4184 u8 ecwmax = (pos[1] & 0xf0) >> 4;
4185 int aci = (pos[0] >> 5) & 0x03;
4186
4187 if (aifsn < 2) {
4188 sdata_info(sdata,
4189 "AP has invalid WMM params (AIFSN=%d for ACI %d), disabling WMM\n",
4190 aifsn, aci);
4191 return false;
4192 }
4193 if (ecwmin > ecwmax) {
4194 sdata_info(sdata,
4195 "AP has invalid WMM params (ECWmin/max=%d/%d for ACI %d), disabling WMM\n",
4196 ecwmin, ecwmax, aci);
4197 return false;
4198 }
4199 }
4200
4201 return true;
4202}
4203
77fdaa12
JB		 4204int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4205 struct cfg80211_assoc_request *req)
f0706e82 4206{
66e67e41 4207 struct ieee80211_local *local = sdata->local;
77fdaa12 4208 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 4209 struct ieee80211_bss *bss = (void *)req->bss->priv;
66e67e41 4210 struct ieee80211_mgd_assoc_data *assoc_data;
c65dd147 4211 const struct cfg80211_bss_ies *beacon_ies;
4e74bfdb 4212 struct ieee80211_supported_band *sband;
b08fbbd8 4213 const u8 *ssidie, *ht_ie, *vht_ie;
2a33bee2 4214 int i, err;
f0706e82 4215
66e67e41
JB		 4216 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4217 if (!assoc_data)
4218 return -ENOMEM;
4219
9caf0364
JB		 4220 rcu_read_lock();
4221 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4222 if (!ssidie) {
4223 rcu_read_unlock();
4224 kfree(assoc_data);
4225 return -EINVAL;
4226 }
4227 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4228 assoc_data->ssid_len = ssidie[1];
4229 rcu_read_unlock();
4230
7b119dc0
JB		 4231 if (ifmgd->associated) {
4232 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4233
4234 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4235 WLAN_REASON_UNSPECIFIED,
4236 false, frame_buf);
4237
6ff57cf8
JB		 4238 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4239 sizeof(frame_buf));
7b119dc0 4240 }
66e67e41
JB		 4241
4242 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4243 err = -EBUSY;
4244 goto err_free;
af6b6374 4245 }
77fdaa12 4246
66e67e41
JB		 4247 if (ifmgd->assoc_data) {
4248 err = -EBUSY;
4249 goto err_free;
4250 }
77fdaa12 4251
66e67e41
JB		 4252 if (ifmgd->auth_data) {
4253 bool match;
4254
4255 /* keep sta info, bssid if matching */
b203ca39 4256 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
66e67e41 4257 ieee80211_destroy_auth_data(sdata, match);
2a33bee2
GE		 4258 }
4259
66e67e41 4260 /* prepare assoc data */
095d81ce 4261
d8ec4433
JO		 4262 ifmgd->beacon_crc_valid = false;
4263
095d81ce
JB		 4264 assoc_data->wmm = bss->wmm_used &&
4265 (local->hw.queues >= IEEE80211_NUM_ACS);
4266 if (assoc_data->wmm) {
4267 /* try to check validity of WMM params IE */
4268 const struct cfg80211_bss_ies *ies;
4269 const u8 *wp, *start, *end;
4270
4271 rcu_read_lock();
4272 ies = rcu_dereference(req->bss->ies);
4273 start = ies->data;
4274 end = start + ies->len;
4275
4276 while (true) {
4277 wp = cfg80211_find_vendor_ie(
4278 WLAN_OUI_MICROSOFT,
4279 WLAN_OUI_TYPE_MICROSOFT_WMM,
4280 start, end - start);
4281 if (!wp)
4282 break;
4283 start = wp + wp[1] + 2;
4284 /* if this IE is too short, try the next */
4285 if (wp[1] <= 4)
4286 continue;
4287 /* if this IE is WMM params, we found what we wanted */
4288 if (wp[6] == 1)
4289 break;
4290 }
4291
4292 if (!wp || !ieee80211_usable_wmm_params(sdata, wp + 2,
4293 wp[1] - 2)) {
4294 assoc_data->wmm = false;
4295 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
4296 }
4297 rcu_read_unlock();
4298 }
4299
de5036aa
JB		 4300 /*
4301 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4302 * We still associate in non-HT mode (11a/b/g) if any one of these
4303 * ciphers is configured as pairwise.
4304 * We can set this to true for non-11n hardware, that'll be checked
4305 * separately along with the peer capabilities.
4306 */
1c4cb928 4307 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
77fdaa12
JB		 4308 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4309 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
1c4cb928 4310 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
a8243b72 4311 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
d545daba 4312 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
1c4cb928 4313 netdev_info(sdata->dev,
d545daba 4314 "disabling HT/VHT due to WEP/TKIP use\n");
1c4cb928
JB		 4315 }
4316 }
77fdaa12 4317
d545daba 4318 if (req->flags & ASSOC_REQ_DISABLE_HT) {
a8243b72 4319 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
d545daba
MP		 4320 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4321 }
ef96a842 4322
dd5ecfea
JB		 4323 if (req->flags & ASSOC_REQ_DISABLE_VHT)
4324 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4325
4e74bfdb
JB		 4326 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4327 sband = local->hw.wiphy->bands[req->bss->channel->band];
4328 if (!sband->ht_cap.ht_supported ||
095d81ce
JB		 4329 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4330 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
a8243b72 4331 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
095d81ce
JB		 4332 if (!bss->wmm_used &&
4333 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
1b49de26
JB		 4334 netdev_info(sdata->dev,
4335 "disabling HT as WMM/QoS is not supported by the AP\n");
1c4cb928 4336 }
4e74bfdb 4337
d545daba
MP		 4338 /* disable VHT if we don't support it or the AP doesn't use WMM */
4339 if (!sband->vht_cap.vht_supported ||
095d81ce
JB		 4340 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4341 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
d545daba 4342 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
095d81ce
JB		 4343 if (!bss->wmm_used &&
4344 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
1b49de26
JB		 4345 netdev_info(sdata->dev,
4346 "disabling VHT as WMM/QoS is not supported by the AP\n");
d545daba
MP		 4347 }
4348
ef96a842
BG		 4349 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4350 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4351 sizeof(ifmgd->ht_capa_mask));
4352
dd5ecfea
JB		 4353 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4354 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4355 sizeof(ifmgd->vht_capa_mask));
4356
77fdaa12 4357 if (req->ie && req->ie_len) {
66e67e41
JB		 4358 memcpy(assoc_data->ie, req->ie, req->ie_len);
4359 assoc_data->ie_len = req->ie_len;
4360 }
f679f65d 4361
66e67e41 4362 assoc_data->bss = req->bss;
f679f65d 4363
af6b6374
JB		 4364 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4365 if (ifmgd->powersave)
04ecd257 4366 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
af6b6374 4367 else
04ecd257 4368 sdata->smps_mode = IEEE80211_SMPS_OFF;
af6b6374 4369 } else
04ecd257 4370 sdata->smps_mode = ifmgd->req_smps;
af6b6374 4371
66e67e41 4372 assoc_data->capability = req->bss->capability;
66e67e41
JB		 4373 assoc_data->supp_rates = bss->supp_rates;
4374 assoc_data->supp_rates_len = bss->supp_rates_len;
9dde6423 4375
9caf0364 4376 rcu_read_lock();
9dde6423
JB		 4377 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4378 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4379 assoc_data->ap_ht_param =
4380 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4381 else
a8243b72 4382 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
b08fbbd8
JB		 4383 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4384 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4385 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4386 sizeof(struct ieee80211_vht_cap));
4387 else
4388 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
9caf0364 4389 rcu_read_unlock();
63f170e0 4390
ab13315a 4391 if (bss->wmm_used && bss->uapsd_supported &&
24aa11ab
AB		 4392 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD) &&
4393 sdata->wmm_acm != 0xff) {
76f0303d 4394 assoc_data->uapsd = true;
ab13315a
KV		 4395 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4396 } else {
76f0303d 4397 assoc_data->uapsd = false;
ab13315a
KV		 4398 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4399 }
4400
77fdaa12 4401 if (req->prev_bssid)
66e67e41 4402 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12
JB		 4403
4404 if (req->use_mfp) {
4405 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4406 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4407 } else {
4408 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4409 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4410 }
4411
4412 if (req->crypto.control_port)
4413 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4414 else
4415 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4416
a621fa4d
JB		 4417 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4418 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
2475b1cc
MS		 4419 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
4420 sdata->vif.type);
a621fa4d 4421
66e67e41
JB		 4422 /* kick off associate process */
4423
4424 ifmgd->assoc_data = assoc_data;
826262c3 4425 ifmgd->dtim_period = 0;
989c6505 4426 ifmgd->have_beacon = false;
66e67e41 4427
a1cf775d
JB		 4428 err = ieee80211_prep_connection(sdata, req->bss, true);
4429 if (err)
4430 goto err_clear;
66e67e41 4431
c65dd147
EG		 4432 rcu_read_lock();
4433 beacon_ies = rcu_dereference(req->bss->beacon_ies);
826262c3 4434
c65dd147
EG		 4435 if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC &&
4436 !beacon_ies) {
4437 /*
4438 * Wait up to one beacon interval ...
4439 * should this be more if we miss one?
4440 */
4441 sdata_info(sdata, "waiting for beacon from %pM\n",
4442 ifmgd->bssid);
4443 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
89afe614 4444 assoc_data->timeout_started = true;
c65dd147
EG		 4445 assoc_data->need_beacon = true;
4446 } else if (beacon_ies) {
4447 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4448 beacon_ies->data,
4449 beacon_ies->len);
ef429dad
JB		 4450 u8 dtim_count = 0;
4451
c65dd147
EG		 4452 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4453 const struct ieee80211_tim_ie *tim;
4454 tim = (void *)(tim_ie + 2);
4455 ifmgd->dtim_period = tim->dtim_period;
ef429dad 4456 dtim_count = tim->dtim_count;
826262c3 4457 }
989c6505 4458 ifmgd->have_beacon = true;
66e67e41 4459 assoc_data->timeout = jiffies;
89afe614 4460 assoc_data->timeout_started = true;
ef429dad
JB		 4461
4462 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
4463 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4464 sdata->vif.bss_conf.sync_device_ts =
4465 bss->device_ts_beacon;
4466 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4467 }
c65dd147
EG		 4468 } else {
4469 assoc_data->timeout = jiffies;
89afe614 4470 assoc_data->timeout_started = true;
66e67e41 4471 }
c65dd147
EG		 4472 rcu_read_unlock();
4473
8d61ffa5 4474 run_again(sdata, assoc_data->timeout);
66e67e41 4475
fcff4f10
PS		 4476 if (bss->corrupt_data) {
4477 char *corrupt_type = "data";
4478 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4479 if (bss->corrupt_data &
4480 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4481 corrupt_type = "beacon and probe response";
4482 else
4483 corrupt_type = "beacon";
4484 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4485 corrupt_type = "probe response";
bdcbd8e0
JB		 4486 sdata_info(sdata, "associating with AP with corrupt %s\n",
4487 corrupt_type);
fcff4f10
PS		 4488 }
4489
8d61ffa5 4490 return 0;
66e67e41 4491 err_clear:
3d2abdfd
EP		 4492 memset(ifmgd->bssid, 0, ETH_ALEN);
4493 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 4494 ifmgd->assoc_data = NULL;
4495 err_free:
4496 kfree(assoc_data);
66e67e41 4497 return err;
f0706e82
JB		 4498}
4499
77fdaa12 4500int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
63c9c5e7 4501 struct cfg80211_deauth_request *req)
f0706e82 4502{
46900298 4503 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 4504 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
6863255b 4505 bool tx = !req->local_state_change;
f0706e82 4506
c9c3a060
JB		 4507 if (ifmgd->auth_data &&
4508 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
4509 sdata_info(sdata,
4510 "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
4511 req->bssid, req->reason_code,
4512 ieee80211_get_reason_code_string(req->reason_code));
0ff71613 4513
8c7d857c 4514 drv_mgd_prepare_tx(sdata->local, sdata);
37ad3888
JB		 4515 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4516 IEEE80211_STYPE_DEAUTH,
6863255b 4517 req->reason_code, tx,
37ad3888 4518 frame_buf);
86552017 4519 ieee80211_destroy_auth_data(sdata, false);
c9c3a060
JB		 4520 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4521 IEEE80211_DEAUTH_FRAME_LEN);
86552017 4522
c9c3a060 4523 return 0;
8c7d857c
EG		 4524 }
4525
86552017
JB		 4526 if (ifmgd->associated &&
4527 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
c9c3a060
JB		 4528 sdata_info(sdata,
4529 "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
4530 req->bssid, req->reason_code,
4531 ieee80211_get_reason_code_string(req->reason_code));
4532
86552017
JB		 4533 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4534 req->reason_code, tx, frame_buf);
6ff57cf8
JB		 4535 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4536 IEEE80211_DEAUTH_FRAME_LEN);
c9c3a060
JB		 4537 return 0;
4538 }
86552017 4539
c9c3a060 4540 return -ENOTCONN;
f0706e82 4541}
84363e6e 4542
77fdaa12 4543int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 4544 struct cfg80211_disassoc_request *req)
9c6bd790 4545{
77fdaa12 4546 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 4547 u8 bssid[ETH_ALEN];
6ae16775 4548 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
9c6bd790 4549
8d8b261a
JB		 4550 /*
4551 * cfg80211 should catch this ... but it's racy since
4552 * we can receive a disassoc frame, process it, hand it
4553 * to cfg80211 while that's in a locked section already
4554 * trying to tell us that the user wants to disconnect.
4555 */
8d61ffa5 4556 if (ifmgd->associated != req->bss)
77fdaa12 4557 return -ENOLINK;
77fdaa12 4558
bdcbd8e0 4559 sdata_info(sdata,
dfa1ad29
CO		 4560 "disassociating from %pM by local choice (Reason: %u=%s)\n",
4561 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
0ff71613 4562
e69e95db 4563 memcpy(bssid, req->bss->bssid, ETH_ALEN);
37ad3888
JB		 4564 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4565 req->reason_code, !req->local_state_change,
4566 frame_buf);
10f644a4 4567
6ff57cf8
JB		 4568 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4569 IEEE80211_DEAUTH_FRAME_LEN);
bc83b681 4570
10f644a4
JB		 4571 return 0;
4572}
026331c4 4573
afa762f6 4574void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
54e4ffb2
JB		 4575{
4576 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4577
49921859
BG		 4578 /*
4579 * Make sure some work items will not run after this,
4580 * they will not do anything but might not have been
4581 * cancelled when disconnecting.
4582 */
4583 cancel_work_sync(&ifmgd->monitor_work);
4584 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
4585 cancel_work_sync(&ifmgd->request_smps_work);
4586 cancel_work_sync(&ifmgd->csa_connection_drop_work);
4587 cancel_work_sync(&ifmgd->chswitch_work);
4588
8d61ffa5 4589 sdata_lock(sdata);
959867fa
JB		 4590 if (ifmgd->assoc_data) {
4591 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
54e4ffb2 4592 ieee80211_destroy_assoc_data(sdata, false);
959867fa
JB		 4593 cfg80211_assoc_timeout(sdata->dev, bss);
4594 }
54e4ffb2
JB		 4595 if (ifmgd->auth_data)
4596 ieee80211_destroy_auth_data(sdata, false);
4597 del_timer_sync(&ifmgd->timer);
8d61ffa5 4598 sdata_unlock(sdata);
54e4ffb2
JB		 4599}
4600
a97c13c3
JO		 4601void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
4602 enum nl80211_cqm_rssi_threshold_event rssi_event,
4603 gfp_t gfp)
4604{
4605 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4606
b5878a2d
JB		 4607 trace_api_cqm_rssi_notify(sdata, rssi_event);
4608
a97c13c3
JO		 4609 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
4610}
4611EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
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