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mac80211: add TDLS QoS param IE on setup-confirm
[linux.git] / net / mac80211 / mlme.c
CommitLineData
f0706e82
JB		 1/*
2 * BSS client mode implementation
5394af4d 3 * Copyright 2003-2008, Jouni Malinen <[email protected]>
f0706e82
JB		 4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <[email protected]>
7 * Copyright 2007, Michael Wu <[email protected]>
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
40b861a0 833 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
66e67e41
JB		 834 }
835
836 /* add any remaining custom (i.e. vendor specific here) IEs */
b3f51e94 837 if (assoc_data->ie_len) {
66e67e41
JB		 838 noffset = assoc_data->ie_len;
839 pos = skb_put(skb, noffset - offset);
840 memcpy(pos, assoc_data->ie + offset, noffset - offset);
841 }
842
a1845fc7
JB		 843 drv_mgd_prepare_tx(local, sdata);
844
66e67e41 845 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1672c0e3
JB		 846 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
847 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
848 IEEE80211_TX_INTFL_MLME_CONN_TX;
66e67e41
JB		 849 ieee80211_tx_skb(sdata, skb);
850}
851
572e0012
KV		 852void ieee80211_send_pspoll(struct ieee80211_local *local,
853 struct ieee80211_sub_if_data *sdata)
854{
572e0012
KV		 855 struct ieee80211_pspoll *pspoll;
856 struct sk_buff *skb;
572e0012 857
d8cd189e
KV		 858 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
859 if (!skb)
572e0012 860 return;
572e0012 861
d8cd189e
KV		 862 pspoll = (struct ieee80211_pspoll *) skb->data;
863 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
572e0012 864
62ae67be
JB		 865 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
866 ieee80211_tx_skb(sdata, skb);
572e0012
KV		 867}
868
965bedad
JB		 869void ieee80211_send_nullfunc(struct ieee80211_local *local,
870 struct ieee80211_sub_if_data *sdata,
871 int powersave)
872{
873 struct sk_buff *skb;
d8cd189e 874 struct ieee80211_hdr_3addr *nullfunc;
b6f35301 875 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
965bedad 876
d8cd189e
KV		 877 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
878 if (!skb)
965bedad 879 return;
965bedad 880
d8cd189e 881 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
965bedad 882 if (powersave)
d8cd189e 883 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
965bedad 884
6c17b77b
SF		 885 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
886 IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
ff40b425
PF		 887
888 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
889 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
890
392b9ffb 891 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
b6f35301
RM		 892 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
893
62ae67be 894 ieee80211_tx_skb(sdata, skb);
965bedad
JB		 895}
896
d524215f
FF		 897static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
898 struct ieee80211_sub_if_data *sdata)
899{
900 struct sk_buff *skb;
901 struct ieee80211_hdr *nullfunc;
902 __le16 fc;
903
904 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
905 return;
906
907 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
d15b8459 908 if (!skb)
d524215f 909 return;
d15b8459 910
d524215f
FF		 911 skb_reserve(skb, local->hw.extra_tx_headroom);
912
913 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
914 memset(nullfunc, 0, 30);
915 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
916 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
917 nullfunc->frame_control = fc;
918 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
919 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
920 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
921 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
922
923 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
924 ieee80211_tx_skb(sdata, skb);
925}
926
cc32abd4
JB		 927/* spectrum management related things */
928static void ieee80211_chswitch_work(struct work_struct *work)
929{
930 struct ieee80211_sub_if_data *sdata =
931 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
675a0b04 932 struct ieee80211_local *local = sdata->local;
cc32abd4 933 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
7578d575 934 int ret;
cc32abd4 935
9607e6b6 936 if (!ieee80211_sdata_running(sdata))
cc32abd4
JB		 937 return;
938
8d61ffa5 939 sdata_lock(sdata);
4c3ebc56
MK		 940 mutex_lock(&local->mtx);
941 mutex_lock(&local->chanctx_mtx);
942
77fdaa12
JB		 943 if (!ifmgd->associated)
944 goto out;
cc32abd4 945
4c3ebc56
MK		 946 if (!sdata->vif.csa_active)
947 goto out;
948
949 /*
950 * using reservation isn't immediate as it may be deferred until later
951 * with multi-vif. once reservation is complete it will re-schedule the
952 * work with no reserved_chanctx so verify chandef to check if it
953 * completed successfully
954 */
955
956 if (sdata->reserved_chanctx) {
957 /*
958 * with multi-vif csa driver may call ieee80211_csa_finish()
959 * many times while waiting for other interfaces to use their
960 * reservations
961 */
962 if (sdata->reserved_ready)
963 goto out;
964
965 ret = ieee80211_vif_use_reserved_context(sdata);
966 if (ret) {
967 sdata_info(sdata,
968 "failed to use reserved channel context, disconnecting (err=%d)\n",
969 ret);
970 ieee80211_queue_work(&sdata->local->hw,
971 &ifmgd->csa_connection_drop_work);
972 goto out;
973 }
974
975 goto out;
976 }
977
978 if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
979 &sdata->csa_chandef)) {
7578d575 980 sdata_info(sdata,
4c3ebc56 981 "failed to finalize channel switch, disconnecting\n");
7578d575
AN		 982 ieee80211_queue_work(&sdata->local->hw,
983 &ifmgd->csa_connection_drop_work);
984 goto out;
985 }
675a0b04 986
cc32abd4 987 /* XXX: shouldn't really modify cfg80211-owned data! */
33787fc4 988 ifmgd->associated->channel = sdata->csa_chandef.chan;
cc32abd4 989
59af6928 990 sdata->vif.csa_active = false;
4c3ebc56 991
57eebdf3 992 /* XXX: wait for a beacon first? */
a46992b4
LC		 993 if (sdata->csa_block_tx) {
994 ieee80211_wake_vif_queues(local, sdata,
995 IEEE80211_QUEUE_STOP_REASON_CSA);
996 sdata->csa_block_tx = false;
997 }
7578d575 998
77fdaa12 999 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
59af6928 1000
e5593f56
MK		 1001 ieee80211_sta_reset_beacon_monitor(sdata);
1002 ieee80211_sta_reset_conn_monitor(sdata);
1003
59af6928 1004out:
4c3ebc56
MK		 1005 mutex_unlock(&local->chanctx_mtx);
1006 mutex_unlock(&local->mtx);
8d61ffa5 1007 sdata_unlock(sdata);
cc32abd4
JB		 1008}
1009
5ce6e438
JB		 1010void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1011{
55de908a
JB		 1012 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1013 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5ce6e438
JB		 1014
1015 trace_api_chswitch_done(sdata, success);
1016 if (!success) {
882a7c69
JB		 1017 sdata_info(sdata,
1018 "driver channel switch failed, disconnecting\n");
1019 ieee80211_queue_work(&sdata->local->hw,
1020 &ifmgd->csa_connection_drop_work);
1021 } else {
1022 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
5ce6e438 1023 }
5ce6e438
JB		 1024}
1025EXPORT_SYMBOL(ieee80211_chswitch_done);
1026
cc32abd4
JB		 1027static void ieee80211_chswitch_timer(unsigned long data)
1028{
1029 struct ieee80211_sub_if_data *sdata =
1030 (struct ieee80211_sub_if_data *) data;
5bb644a0 1031
9b7d72c1 1032 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
cc32abd4
JB		 1033}
1034
37799e52 1035static void
4a3cb702 1036ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
04a161f4
JB		 1037 u64 timestamp, struct ieee802_11_elems *elems,
1038 bool beacon)
cc32abd4 1039{
b4f286a1 1040 struct ieee80211_local *local = sdata->local;
cc32abd4 1041 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
37799e52 1042 struct cfg80211_bss *cbss = ifmgd->associated;
4c3ebc56 1043 struct ieee80211_chanctx_conf *conf;
55de908a 1044 struct ieee80211_chanctx *chanctx;
e6b7cde4 1045 enum ieee80211_band current_band;
c0f17eb9 1046 struct ieee80211_csa_ie csa_ie;
e6b7cde4 1047 int res;
cc32abd4 1048
8d61ffa5 1049 sdata_assert_lock(sdata);
77fdaa12 1050
37799e52 1051 if (!cbss)
cc32abd4
JB		 1052 return;
1053
b4f286a1 1054 if (local->scanning)
cc32abd4
JB		 1055 return;
1056
37799e52 1057 /* disregard subsequent announcements if we are already processing */
cc32abd4
JB		 1058 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
1059 return;
1060
e6b7cde4 1061 current_band = cbss->channel->band;
c0f17eb9 1062 memset(&csa_ie, 0, sizeof(csa_ie));
e6b7cde4
SW		 1063 res = ieee80211_parse_ch_switch_ie(sdata, elems, beacon, current_band,
1064 ifmgd->flags,
c0f17eb9 1065 ifmgd->associated->bssid, &csa_ie);
e6b7cde4 1066 if (res < 0)
b4f286a1 1067 ieee80211_queue_work(&local->hw,
882a7c69 1068 &ifmgd->csa_connection_drop_work);
e6b7cde4 1069 if (res)
cc32abd4 1070 return;
cd64f2a9 1071
c0f17eb9 1072 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
85220d71
JB		 1073 IEEE80211_CHAN_DISABLED)) {
1074 sdata_info(sdata,
1075 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
e6b7cde4 1076 ifmgd->associated->bssid,
c0f17eb9
CYY		 1077 csa_ie.chandef.chan->center_freq,
1078 csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1079 csa_ie.chandef.center_freq2);
85220d71
JB		 1080 ieee80211_queue_work(&local->hw,
1081 &ifmgd->csa_connection_drop_work);
1082 return;
1083 }
1084
57eebdf3
JB		 1085 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
1086
4c3ebc56 1087 mutex_lock(&local->mtx);
7578d575 1088 mutex_lock(&local->chanctx_mtx);
4c3ebc56
MK		 1089 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1090 lockdep_is_held(&local->chanctx_mtx));
1091 if (!conf) {
1092 sdata_info(sdata,
1093 "no channel context assigned to vif?, disconnecting\n");
1094 ieee80211_queue_work(&local->hw,
1095 &ifmgd->csa_connection_drop_work);
1096 mutex_unlock(&local->chanctx_mtx);
1097 mutex_unlock(&local->mtx);
1098 return;
1099 }
1100
1101 chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1102
b4f286a1 1103 if (local->use_chanctx) {
7578d575
AN		 1104 u32 num_chanctx = 0;
1105 list_for_each_entry(chanctx, &local->chanctx_list, list)
1106 num_chanctx++;
1107
1108 if (num_chanctx > 1 ||
1109 !(local->hw.flags & IEEE80211_HW_CHANCTX_STA_CSA)) {
1110 sdata_info(sdata,
1111 "not handling chan-switch with channel contexts\n");
1112 ieee80211_queue_work(&local->hw,
1113 &ifmgd->csa_connection_drop_work);
1114 mutex_unlock(&local->chanctx_mtx);
4c3ebc56 1115 mutex_unlock(&local->mtx);
7578d575
AN		 1116 return;
1117 }
55de908a
JB		 1118 }
1119
4c3ebc56
MK		 1120 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1121 chanctx->mode, false);
1122 if (res) {
55de908a 1123 sdata_info(sdata,
4c3ebc56
MK		 1124 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1125 res);
b4f286a1 1126 ieee80211_queue_work(&local->hw,
55de908a 1127 &ifmgd->csa_connection_drop_work);
b4f286a1 1128 mutex_unlock(&local->chanctx_mtx);
4c3ebc56 1129 mutex_unlock(&local->mtx);
55de908a
JB		 1130 return;
1131 }
b4f286a1 1132 mutex_unlock(&local->chanctx_mtx);
55de908a 1133
c46a73f3 1134 sdata->vif.csa_active = true;
4c3ebc56 1135 sdata->csa_chandef = csa_ie.chandef;
59af6928 1136 sdata->csa_block_tx = csa_ie.mode;
55de908a 1137
59af6928 1138 if (sdata->csa_block_tx)
a46992b4
LC		 1139 ieee80211_stop_vif_queues(local, sdata,
1140 IEEE80211_QUEUE_STOP_REASON_CSA);
59af6928 1141 mutex_unlock(&local->mtx);
57eebdf3 1142
b4f286a1 1143 if (local->ops->channel_switch) {
5ce6e438 1144 /* use driver's channel switch callback */
57eebdf3
JB		 1145 struct ieee80211_channel_switch ch_switch = {
1146 .timestamp = timestamp,
c0f17eb9
CYY		 1147 .block_tx = csa_ie.mode,
1148 .chandef = csa_ie.chandef,
1149 .count = csa_ie.count,
57eebdf3
JB		 1150 };
1151
b4f286a1 1152 drv_channel_switch(local, &ch_switch);
5ce6e438
JB		 1153 return;
1154 }
1155
1156 /* channel switch handled in software */
c0f17eb9 1157 if (csa_ie.count <= 1)
b4f286a1 1158 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
57eebdf3 1159 else
cc32abd4 1160 mod_timer(&ifmgd->chswitch_timer,
c0f17eb9 1161 TU_TO_EXP_TIME(csa_ie.count * cbss->beacon_interval));
cc32abd4
JB		 1162}
1163
1ea6f9c0
JB		 1164static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1165 struct ieee80211_channel *channel,
1166 const u8 *country_ie, u8 country_ie_len,
1167 const u8 *pwr_constr_elem)
cc32abd4 1168{
04b7b2ff
JB		 1169 struct ieee80211_country_ie_triplet *triplet;
1170 int chan = ieee80211_frequency_to_channel(channel->center_freq);
1171 int i, chan_pwr, chan_increment, new_ap_level;
1172 bool have_chan_pwr = false;
cc32abd4 1173
04b7b2ff
JB		 1174 /* Invalid IE */
1175 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1ea6f9c0 1176 return 0;
cc32abd4 1177
04b7b2ff
JB		 1178 triplet = (void *)(country_ie + 3);
1179 country_ie_len -= 3;
1180
1181 switch (channel->band) {
1182 default:
1183 WARN_ON_ONCE(1);
1184 /* fall through */
1185 case IEEE80211_BAND_2GHZ:
1186 case IEEE80211_BAND_60GHZ:
1187 chan_increment = 1;
1188 break;
1189 case IEEE80211_BAND_5GHZ:
1190 chan_increment = 4;
1191 break;
cc32abd4 1192 }
04b7b2ff
JB		 1193
1194 /* find channel */
1195 while (country_ie_len >= 3) {
1196 u8 first_channel = triplet->chans.first_channel;
1197
1198 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1199 goto next;
1200
1201 for (i = 0; i < triplet->chans.num_channels; i++) {
1202 if (first_channel + i * chan_increment == chan) {
1203 have_chan_pwr = true;
1204 chan_pwr = triplet->chans.max_power;
1205 break;
1206 }
1207 }
1208 if (have_chan_pwr)
1209 break;
1210
1211 next:
1212 triplet++;
1213 country_ie_len -= 3;
1214 }
1215
1216 if (!have_chan_pwr)
1ea6f9c0 1217 return 0;
04b7b2ff
JB		 1218
1219 new_ap_level = max_t(int, 0, chan_pwr - *pwr_constr_elem);
1220
1ea6f9c0
JB		 1221 if (sdata->ap_power_level == new_ap_level)
1222 return 0;
04b7b2ff
JB		 1223
1224 sdata_info(sdata,
1225 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1226 new_ap_level, chan_pwr, *pwr_constr_elem,
1227 sdata->u.mgd.bssid);
1ea6f9c0
JB		 1228 sdata->ap_power_level = new_ap_level;
1229 if (__ieee80211_recalc_txpower(sdata))
1230 return BSS_CHANGED_TXPOWER;
1231 return 0;
cc32abd4
JB		 1232}
1233
965bedad
JB		 1234/* powersave */
1235static void ieee80211_enable_ps(struct ieee80211_local *local,
1236 struct ieee80211_sub_if_data *sdata)
1237{
1238 struct ieee80211_conf *conf = &local->hw.conf;
1239
d5edaedc
JB		 1240 /*
1241 * If we are scanning right now then the parameters will
1242 * take effect when scan finishes.
1243 */
fbe9c429 1244 if (local->scanning)
d5edaedc
JB		 1245 return;
1246
965bedad
JB		 1247 if (conf->dynamic_ps_timeout > 0 &&
1248 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
1249 mod_timer(&local->dynamic_ps_timer, jiffies +
1250 msecs_to_jiffies(conf->dynamic_ps_timeout));
1251 } else {
1252 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1253 ieee80211_send_nullfunc(local, sdata, 1);
375177bf 1254
2a13052f
JO		 1255 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1256 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
1257 return;
1258
1259 conf->flags |= IEEE80211_CONF_PS;
1260 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965bedad
JB		 1261 }
1262}
1263
1264static void ieee80211_change_ps(struct ieee80211_local *local)
1265{
1266 struct ieee80211_conf *conf = &local->hw.conf;
1267
1268 if (local->ps_sdata) {
965bedad
JB		 1269 ieee80211_enable_ps(local, local->ps_sdata);
1270 } else if (conf->flags & IEEE80211_CONF_PS) {
1271 conf->flags &= ~IEEE80211_CONF_PS;
1272 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1273 del_timer_sync(&local->dynamic_ps_timer);
1274 cancel_work_sync(&local->dynamic_ps_enable_work);
1275 }
1276}
1277
808118cb
JY		 1278static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1279{
1280 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1281 struct sta_info *sta = NULL;
c2c98fde 1282 bool authorized = false;
808118cb
JY		 1283
1284 if (!mgd->powersave)
1285 return false;
1286
05cb9108
JB		 1287 if (mgd->broken_ap)
1288 return false;
1289
808118cb
JY		 1290 if (!mgd->associated)
1291 return false;
1292
392b9ffb 1293 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
808118cb
JY		 1294 return false;
1295
989c6505 1296 if (!mgd->have_beacon)
ce857888
AB		 1297 return false;
1298
808118cb
JY		 1299 rcu_read_lock();
1300 sta = sta_info_get(sdata, mgd->bssid);
1301 if (sta)
c2c98fde 1302 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
808118cb
JY		 1303 rcu_read_unlock();
1304
c2c98fde 1305 return authorized;
808118cb
JY		 1306}
1307
965bedad 1308/* need to hold RTNL or interface lock */
10f644a4 1309void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 1310{
1311 struct ieee80211_sub_if_data *sdata, *found = NULL;
1312 int count = 0;
195e294d 1313 int timeout;
965bedad
JB		 1314
1315 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
1316 local->ps_sdata = NULL;
1317 return;
1318 }
1319
1320 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 1321 if (!ieee80211_sdata_running(sdata))
965bedad 1322 continue;
8c7914de
RM		 1323 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1324 /* If an AP vif is found, then disable PS
1325 * by setting the count to zero thereby setting
1326 * ps_sdata to NULL.
1327 */
1328 count = 0;
1329 break;
1330 }
965bedad
JB		 1331 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1332 continue;
1333 found = sdata;
1334 count++;
1335 }
1336
808118cb 1337 if (count == 1 && ieee80211_powersave_allowed(found)) {
10f644a4
JB		 1338 s32 beaconint_us;
1339
1340 if (latency < 0)
ed77134b 1341 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
10f644a4
JB		 1342
1343 beaconint_us = ieee80211_tu_to_usec(
1344 found->vif.bss_conf.beacon_int);
1345
ff616381 1346 timeout = local->dynamic_ps_forced_timeout;
195e294d
JO		 1347 if (timeout < 0) {
1348 /*
ff616381
JO		 1349 * Go to full PSM if the user configures a very low
1350 * latency requirement.
0ab82b04
EP		 1351 * The 2000 second value is there for compatibility
1352 * until the PM_QOS_NETWORK_LATENCY is configured
1353 * with real values.
195e294d 1354 */
0ab82b04
EP		 1355 if (latency > (1900 * USEC_PER_MSEC) &&
1356 latency != (2000 * USEC_PER_SEC))
195e294d 1357 timeout = 0;
ff616381
JO		 1358 else
1359 timeout = 100;
195e294d 1360 }
09b85568 1361 local->hw.conf.dynamic_ps_timeout = timeout;
195e294d 1362
04fe2037 1363 if (beaconint_us > latency) {
10f644a4 1364 local->ps_sdata = NULL;
04fe2037 1365 } else {
04fe2037 1366 int maxslp = 1;
826262c3 1367 u8 dtimper = found->u.mgd.dtim_period;
56007a02
JB		 1368
1369 /* If the TIM IE is invalid, pretend the value is 1 */
1370 if (!dtimper)
1371 dtimper = 1;
1372 else if (dtimper > 1)
04fe2037
JB		 1373 maxslp = min_t(int, dtimper,
1374 latency / beaconint_us);
1375
9ccebe61 1376 local->hw.conf.max_sleep_period = maxslp;
56007a02 1377 local->hw.conf.ps_dtim_period = dtimper;
10f644a4 1378 local->ps_sdata = found;
04fe2037 1379 }
10f644a4 1380 } else {
965bedad 1381 local->ps_sdata = NULL;
10f644a4 1382 }
965bedad
JB		 1383
1384 ieee80211_change_ps(local);
1385}
1386
ab095877
EP		 1387void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1388{
1389 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1390
1391 if (sdata->vif.bss_conf.ps != ps_allowed) {
1392 sdata->vif.bss_conf.ps = ps_allowed;
1393 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1394 }
1395}
1396
965bedad
JB		 1397void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1398{
1399 struct ieee80211_local *local =
1400 container_of(work, struct ieee80211_local,
1401 dynamic_ps_disable_work);
1402
1403 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1404 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1405 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1406 }
1407
1408 ieee80211_wake_queues_by_reason(&local->hw,
445ea4e8 1409 IEEE80211_MAX_QUEUE_MAP,
cca07b00
LC		 1410 IEEE80211_QUEUE_STOP_REASON_PS,
1411 false);
965bedad
JB		 1412}
1413
1414void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1415{
1416 struct ieee80211_local *local =
1417 container_of(work, struct ieee80211_local,
1418 dynamic_ps_enable_work);
1419 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
5e34069c 1420 struct ieee80211_if_managed *ifmgd;
1ddc2867
RM		 1421 unsigned long flags;
1422 int q;
965bedad
JB		 1423
1424 /* can only happen when PS was just disabled anyway */
1425 if (!sdata)
1426 return;
1427
5e34069c
CL		 1428 ifmgd = &sdata->u.mgd;
1429
965bedad
JB		 1430 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1431 return;
1432
09b85568 1433 if (local->hw.conf.dynamic_ps_timeout > 0) {
77b7023a
AN		 1434 /* don't enter PS if TX frames are pending */
1435 if (drv_tx_frames_pending(local)) {
1ddc2867
RM		 1436 mod_timer(&local->dynamic_ps_timer, jiffies +
1437 msecs_to_jiffies(
1438 local->hw.conf.dynamic_ps_timeout));
1439 return;
1440 }
77b7023a
AN		 1441
1442 /*
1443 * transmission can be stopped by others which leads to
1444 * dynamic_ps_timer expiry. Postpone the ps timer if it
1445 * is not the actual idle state.
1446 */
1447 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1448 for (q = 0; q < local->hw.queues; q++) {
1449 if (local->queue_stop_reasons[q]) {
1450 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1451 flags);
1452 mod_timer(&local->dynamic_ps_timer, jiffies +
1453 msecs_to_jiffies(
1454 local->hw.conf.dynamic_ps_timeout));
1455 return;
1456 }
1457 }
1458 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1ddc2867 1459 }
1ddc2867 1460
375177bf 1461 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
9c38a8b4 1462 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
a1598383 1463 if (drv_tx_frames_pending(local)) {
e8306f98
VN		 1464 mod_timer(&local->dynamic_ps_timer, jiffies +
1465 msecs_to_jiffies(
1466 local->hw.conf.dynamic_ps_timeout));
a1598383 1467 } else {
e8306f98
VN		 1468 ieee80211_send_nullfunc(local, sdata, 1);
1469 /* Flush to get the tx status of nullfunc frame */
39ecc01d 1470 ieee80211_flush_queues(local, sdata);
e8306f98 1471 }
f3e85b9e
VN		 1472 }
1473
2a13052f
JO		 1474 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1475 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
375177bf
VN		 1476 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1477 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1478 local->hw.conf.flags |= IEEE80211_CONF_PS;
1479 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1480 }
965bedad
JB		 1481}
1482
1483void ieee80211_dynamic_ps_timer(unsigned long data)
1484{
1485 struct ieee80211_local *local = (void *) data;
1486
78f1a8b7 1487 if (local->quiescing || local->suspended)
5bb644a0
JB		 1488 return;
1489
42935eca 1490 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 1491}
1492
164eb02d
SW		 1493void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1494{
1495 struct delayed_work *delayed_work =
1496 container_of(work, struct delayed_work, work);
1497 struct ieee80211_sub_if_data *sdata =
1498 container_of(delayed_work, struct ieee80211_sub_if_data,
1499 dfs_cac_timer_work);
d2859df5 1500 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
164eb02d 1501
34a3740d
JB		 1502 mutex_lock(&sdata->local->mtx);
1503 if (sdata->wdev.cac_started) {
1504 ieee80211_vif_release_channel(sdata);
1505 cfg80211_cac_event(sdata->dev, &chandef,
1506 NL80211_RADAR_CAC_FINISHED,
1507 GFP_KERNEL);
1508 }
1509 mutex_unlock(&sdata->local->mtx);
164eb02d
SW		 1510}
1511
60f8b39c 1512/* MLME */
7d25745d 1513static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
4ced3f74 1514 struct ieee80211_sub_if_data *sdata,
4a3cb702 1515 const u8 *wmm_param, size_t wmm_param_len)
f0706e82 1516{
f0706e82 1517 struct ieee80211_tx_queue_params params;
4ced3f74 1518 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1519 size_t left;
1520 int count;
4a3cb702
JB		 1521 const u8 *pos;
1522 u8 uapsd_queues = 0;
f0706e82 1523
e1b3ec1a 1524 if (!local->ops->conf_tx)
7d25745d 1525 return false;
e1b3ec1a 1526
32c5057b 1527 if (local->hw.queues < IEEE80211_NUM_ACS)
7d25745d 1528 return false;
3434fbd3
JB		 1529
1530 if (!wmm_param)
7d25745d 1531 return false;
3434fbd3 1532
f0706e82 1533 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
7d25745d 1534 return false;
ab13315a
KV		 1535
1536 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
dc41e4d4 1537 uapsd_queues = ifmgd->uapsd_queues;
ab13315a 1538
f0706e82 1539 count = wmm_param[6] & 0x0f;
46900298 1540 if (count == ifmgd->wmm_last_param_set)
7d25745d 1541 return false;
46900298 1542 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 1543
1544 pos = wmm_param + 8;
1545 left = wmm_param_len - 8;
1546
1547 memset(&params, 0, sizeof(params));
1548
00e96dec 1549 sdata->wmm_acm = 0;
f0706e82
JB		 1550 for (; left >= 4; left -= 4, pos += 4) {
1551 int aci = (pos[0] >> 5) & 0x03;
1552 int acm = (pos[0] >> 4) & 0x01;
ab13315a 1553 bool uapsd = false;
f0706e82
JB		 1554 int queue;
1555
1556 switch (aci) {
0eeb59fe 1557 case 1: /* AC_BK */
e100bb64 1558 queue = 3;
988c0f72 1559 if (acm)
00e96dec 1560 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV		 1561 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1562 uapsd = true;
f0706e82 1563 break;
0eeb59fe 1564 case 2: /* AC_VI */
e100bb64 1565 queue = 1;
988c0f72 1566 if (acm)
00e96dec 1567 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV		 1568 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1569 uapsd = true;
f0706e82 1570 break;
0eeb59fe 1571 case 3: /* AC_VO */
e100bb64 1572 queue = 0;
988c0f72 1573 if (acm)
00e96dec 1574 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV		 1575 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1576 uapsd = true;
f0706e82 1577 break;
0eeb59fe 1578 case 0: /* AC_BE */
f0706e82 1579 default:
e100bb64 1580 queue = 2;
988c0f72 1581 if (acm)
00e96dec 1582 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV		 1583 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1584 uapsd = true;
f0706e82
JB		 1585 break;
1586 }
1587
1588 params.aifs = pos[0] & 0x0f;
1589 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1590 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 1591 params.txop = get_unaligned_le16(pos + 2);
908f8d07 1592 params.acm = acm;
ab13315a
KV		 1593 params.uapsd = uapsd;
1594
bdcbd8e0
JB		 1595 mlme_dbg(sdata,
1596 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1597 queue, aci, acm,
1598 params.aifs, params.cw_min, params.cw_max,
1599 params.txop, params.uapsd);
f6f3def3
EP		 1600 sdata->tx_conf[queue] = params;
1601 if (drv_conf_tx(local, sdata, queue, &params))
bdcbd8e0
JB		 1602 sdata_err(sdata,
1603 "failed to set TX queue parameters for queue %d\n",
1604 queue);
f0706e82 1605 }
e1b3ec1a
SG		 1606
1607 /* enable WMM or activate new settings */
4ced3f74 1608 sdata->vif.bss_conf.qos = true;
7d25745d 1609 return true;
f0706e82
JB		 1610}
1611
925e64c3
SG		 1612static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1613{
1614 lockdep_assert_held(&sdata->local->mtx);
1615
392b9ffb 1616 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
925e64c3
SG		 1617 ieee80211_run_deferred_scan(sdata->local);
1618}
1619
1620static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1621{
1622 mutex_lock(&sdata->local->mtx);
1623 __ieee80211_stop_poll(sdata);
1624 mutex_unlock(&sdata->local->mtx);
1625}
1626
7a5158ef
JB		 1627static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1628 u16 capab, bool erp_valid, u8 erp)
5628221c 1629{
bda3933a 1630 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 1631 u32 changed = 0;
7a5158ef
JB		 1632 bool use_protection;
1633 bool use_short_preamble;
1634 bool use_short_slot;
1635
1636 if (erp_valid) {
1637 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1638 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1639 } else {
1640 use_protection = false;
1641 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1642 }
1643
1644 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
55de908a 1645 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
43d35343 1646 use_short_slot = true;
5628221c 1647
471b3efd 1648 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 1649 bss_conf->use_cts_prot = use_protection;
1650 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 1651 }
7e9ed188 1652
d43c7b37 1653 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 1654 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 1655 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 1656 }
d9430a32 1657
7a5158ef 1658 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 1659 bss_conf->use_short_slot = use_short_slot;
1660 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 1661 }
1662
1663 return changed;
1664}
1665
f698d856 1666static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 1667 struct cfg80211_bss *cbss,
ae5eb026 1668 u32 bss_info_changed)
f0706e82 1669{
0c1ad2ca 1670 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 1671 struct ieee80211_local *local = sdata->local;
68542962 1672 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
d6f2da5b 1673
ae5eb026 1674 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 1675 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
50ae34a2 1676 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 1677
7ccc8bd7 1678 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
59c1ec2b 1679 beacon_loss_count * bss_conf->beacon_int));
7ccc8bd7 1680
0c1ad2ca
JB		 1681 sdata->u.mgd.associated = cbss;
1682 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 1683
17e4ec14
JM		 1684 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1685
488dd7b5 1686 if (sdata->vif.p2p) {
9caf0364 1687 const struct cfg80211_bss_ies *ies;
488dd7b5 1688
9caf0364
JB		 1689 rcu_read_lock();
1690 ies = rcu_dereference(cbss->ies);
1691 if (ies) {
9caf0364
JB		 1692 int ret;
1693
1694 ret = cfg80211_get_p2p_attr(
1695 ies->data, ies->len,
1696 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
67baf663
JD		 1697 (u8 *) &bss_conf->p2p_noa_attr,
1698 sizeof(bss_conf->p2p_noa_attr));
9caf0364 1699 if (ret >= 2) {
67baf663
JD		 1700 sdata->u.mgd.p2p_noa_index =
1701 bss_conf->p2p_noa_attr.index;
9caf0364 1702 bss_info_changed |= BSS_CHANGED_P2P_PS;
9caf0364 1703 }
488dd7b5 1704 }
9caf0364 1705 rcu_read_unlock();
488dd7b5
JB		 1706 }
1707
b291ba11 1708 /* just to be sure */
925e64c3 1709 ieee80211_stop_poll(sdata);
b291ba11 1710
9ac19a90 1711 ieee80211_led_assoc(local, 1);
9306102e 1712
989c6505 1713 if (sdata->u.mgd.have_beacon) {
826262c3
JB		 1714 /*
1715 * If the AP is buggy we may get here with no DTIM period
1716 * known, so assume it's 1 which is the only safe assumption
1717 * in that case, although if the TIM IE is broken powersave
1718 * probably just won't work at all.
1719 */
1720 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
817cee76 1721 bss_conf->beacon_rate = bss->beacon_rate;
989c6505 1722 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
826262c3 1723 } else {
817cee76 1724 bss_conf->beacon_rate = NULL;
e5b900d2 1725 bss_conf->dtim_period = 0;
826262c3 1726 }
e5b900d2 1727
68542962 1728 bss_conf->assoc = 1;
9cef8737 1729
a97c13c3 1730 /* Tell the driver to monitor connection quality (if supported) */
ea086359 1731 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
68542962 1732 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 1733 bss_info_changed |= BSS_CHANGED_CQM;
1734
68542962 1735 /* Enable ARP filtering */
0f19b41e 1736 if (bss_conf->arp_addr_cnt)
68542962 1737 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
68542962 1738
ae5eb026 1739 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 1740
056508dc
JB		 1741 mutex_lock(&local->iflist_mtx);
1742 ieee80211_recalc_ps(local, -1);
1743 mutex_unlock(&local->iflist_mtx);
e0cb686f 1744
04ecd257 1745 ieee80211_recalc_smps(sdata);
ab095877
EP		 1746 ieee80211_recalc_ps_vif(sdata);
1747
9ac19a90 1748 netif_carrier_on(sdata->dev);
f0706e82
JB		 1749}
1750
e69e95db 1751static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
37ad3888
JB		 1752 u16 stype, u16 reason, bool tx,
1753 u8 *frame_buf)
aa458d17 1754{
46900298 1755 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17 1756 struct ieee80211_local *local = sdata->local;
3cc5240b 1757 u32 changed = 0;
aa458d17 1758
8d61ffa5 1759 sdata_assert_lock(sdata);
77fdaa12 1760
37ad3888
JB		 1761 if (WARN_ON_ONCE(tx && !frame_buf))
1762 return;
1763
b291ba11
JB		 1764 if (WARN_ON(!ifmgd->associated))
1765 return;
1766
79543d8e
DS		 1767 ieee80211_stop_poll(sdata);
1768
77fdaa12 1769 ifmgd->associated = NULL;
aa458d17
TW		 1770 netif_carrier_off(sdata->dev);
1771
88bc40e8
EP		 1772 /*
1773 * if we want to get out of ps before disassoc (why?) we have
1774 * to do it before sending disassoc, as otherwise the null-packet
1775 * won't be valid.
1776 */
1777 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1778 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1779 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1780 }
1781 local->ps_sdata = NULL;
1782
ab095877
EP		 1783 /* disable per-vif ps */
1784 ieee80211_recalc_ps_vif(sdata);
1785
f823981e
EP		 1786 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1787 if (tx)
39ecc01d 1788 ieee80211_flush_queues(local, sdata);
f823981e 1789
37ad3888
JB		 1790 /* deauthenticate/disassociate now */
1791 if (tx || frame_buf)
88a9e31c
EP		 1792 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
1793 reason, tx, frame_buf);
37ad3888
JB		 1794
1795 /* flush out frame */
1796 if (tx)
39ecc01d 1797 ieee80211_flush_queues(local, sdata);
37ad3888 1798
88a9e31c
EP		 1799 /* clear bssid only after building the needed mgmt frames */
1800 memset(ifmgd->bssid, 0, ETH_ALEN);
1801
37ad3888 1802 /* remove AP and TDLS peers */
d34ba216 1803 sta_info_flush(sdata);
37ad3888
JB		 1804
1805 /* finally reset all BSS / config parameters */
f5e5bf25
TW		 1806 changed |= ieee80211_reset_erp_info(sdata);
1807
f5e5bf25 1808 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 1809 changed |= BSS_CHANGED_ASSOC;
1810 sdata->vif.bss_conf.assoc = false;
f5e5bf25 1811
67baf663
JD		 1812 ifmgd->p2p_noa_index = -1;
1813 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
1814 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
488dd7b5 1815
dd5ecfea 1816 /* on the next assoc, re-program HT/VHT parameters */
ef96a842
BG		 1817 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1818 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
dd5ecfea
JB		 1819 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
1820 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
413ad50a 1821
1ea6f9c0 1822 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
a8302de9 1823
520eb820
KV		 1824 del_timer_sync(&local->dynamic_ps_timer);
1825 cancel_work_sync(&local->dynamic_ps_enable_work);
1826
68542962 1827 /* Disable ARP filtering */
0f19b41e 1828 if (sdata->vif.bss_conf.arp_addr_cnt)
68542962 1829 changed |= BSS_CHANGED_ARP_FILTER;
68542962 1830
3abead59
JB		 1831 sdata->vif.bss_conf.qos = false;
1832 changed |= BSS_CHANGED_QOS;
1833
0aaffa9b
JB		 1834 /* The BSSID (not really interesting) and HT changed */
1835 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 1836 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 1837
3abead59
JB		 1838 /* disassociated - set to defaults now */
1839 ieee80211_set_wmm_default(sdata, false);
1840
b9dcf712
JB		 1841 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1842 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1843 del_timer_sync(&sdata->u.mgd.timer);
1844 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2d9957cc 1845
826262c3 1846 sdata->vif.bss_conf.dtim_period = 0;
817cee76
AB		 1847 sdata->vif.bss_conf.beacon_rate = NULL;
1848
989c6505 1849 ifmgd->have_beacon = false;
826262c3 1850
028e8da0 1851 ifmgd->flags = 0;
34a3740d 1852 mutex_lock(&local->mtx);
028e8da0 1853 ieee80211_vif_release_channel(sdata);
59af6928
MK		 1854
1855 sdata->vif.csa_active = false;
a46992b4
LC		 1856 if (sdata->csa_block_tx) {
1857 ieee80211_wake_vif_queues(local, sdata,
1858 IEEE80211_QUEUE_STOP_REASON_CSA);
1859 sdata->csa_block_tx = false;
1860 }
34a3740d 1861 mutex_unlock(&local->mtx);
2475b1cc
MS		 1862
1863 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
aa458d17 1864}
f0706e82 1865
3cf335d5
KV		 1866void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1867 struct ieee80211_hdr *hdr)
1868{
1869 /*
1870 * We can postpone the mgd.timer whenever receiving unicast frames
1871 * from AP because we know that the connection is working both ways
1872 * at that time. But multicast frames (and hence also beacons) must
1873 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 1874 * data idle periods for sending the periodic probe request to the
1875 * AP we're connected to.
3cf335d5 1876 */
b291ba11
JB		 1877 if (is_multicast_ether_addr(hdr->addr1))
1878 return;
1879
be099e82 1880 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 1881}
f0706e82 1882
4e5ff376
FF		 1883static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1884{
1885 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
133d40f9 1886 struct ieee80211_local *local = sdata->local;
4e5ff376 1887
133d40f9 1888 mutex_lock(&local->mtx);
392b9ffb
SG		 1889 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
1890 goto out;
4e5ff376 1891
925e64c3 1892 __ieee80211_stop_poll(sdata);
133d40f9
SG		 1893
1894 mutex_lock(&local->iflist_mtx);
1895 ieee80211_recalc_ps(local, -1);
1896 mutex_unlock(&local->iflist_mtx);
4e5ff376
FF		 1897
1898 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
133d40f9 1899 goto out;
4e5ff376
FF		 1900
1901 /*
1902 * We've received a probe response, but are not sure whether
1903 * we have or will be receiving any beacons or data, so let's
1904 * schedule the timers again, just in case.
1905 */
1906 ieee80211_sta_reset_beacon_monitor(sdata);
1907
1908 mod_timer(&ifmgd->conn_mon_timer,
1909 round_jiffies_up(jiffies +
1910 IEEE80211_CONNECTION_IDLE_TIME));
133d40f9 1911out:
133d40f9 1912 mutex_unlock(&local->mtx);
4e5ff376
FF		 1913}
1914
1915void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
04ac3c0e 1916 struct ieee80211_hdr *hdr, bool ack)
4e5ff376 1917{
75706d0e 1918 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF		 1919 return;
1920
4e5ff376
FF		 1921 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1922 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e 1923 if (ack)
cab1c7fd 1924 ieee80211_sta_reset_conn_monitor(sdata);
04ac3c0e
FF		 1925 else
1926 sdata->u.mgd.nullfunc_failed = true;
4e5ff376 1927 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
cab1c7fd 1928 return;
4e5ff376 1929 }
cab1c7fd
WD		 1930
1931 if (ack)
1932 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF		 1933}
1934
a43abf29
ML		 1935static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1936{
1937 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1938 const u8 *ssid;
f01a067d 1939 u8 *dst = ifmgd->associated->bssid;
180205bd 1940 u8 unicast_limit = max(1, max_probe_tries - 3);
f01a067d
LR		 1941
1942 /*
1943 * Try sending broadcast probe requests for the last three
1944 * probe requests after the first ones failed since some
1945 * buggy APs only support broadcast probe requests.
1946 */
1947 if (ifmgd->probe_send_count >= unicast_limit)
1948 dst = NULL;
a43abf29 1949
4e5ff376
FF		 1950 /*
1951 * When the hardware reports an accurate Tx ACK status, it's
1952 * better to send a nullfunc frame instead of a probe request,
1953 * as it will kick us off the AP quickly if we aren't associated
1954 * anymore. The timeout will be reset if the frame is ACKed by
1955 * the AP.
1956 */
992e68bf
SD		 1957 ifmgd->probe_send_count++;
1958
04ac3c0e
FF		 1959 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1960 ifmgd->nullfunc_failed = false;
4e5ff376 1961 ieee80211_send_nullfunc(sdata->local, sdata, 0);
04ac3c0e 1962 } else {
88c868c4
SG		 1963 int ssid_len;
1964
9caf0364 1965 rcu_read_lock();
4e5ff376 1966 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
88c868c4
SG		 1967 if (WARN_ON_ONCE(ssid == NULL))
1968 ssid_len = 0;
1969 else
1970 ssid_len = ssid[1];
1971
1972 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
1672c0e3 1973 0, (u32) -1, true, 0,
55de908a 1974 ifmgd->associated->channel, false);
9caf0364 1975 rcu_read_unlock();
4e5ff376 1976 }
a43abf29 1977
180205bd 1978 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
8d61ffa5 1979 run_again(sdata, ifmgd->probe_timeout);
f69b9c79 1980 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
39ecc01d 1981 ieee80211_flush_queues(sdata->local, sdata);
a43abf29
ML		 1982}
1983
b291ba11
JB		 1984static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1985 bool beacon)
04de8381 1986{
04de8381 1987 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 1988 bool already = false;
34bfc411 1989
9607e6b6 1990 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 1991 return;
1992
8d61ffa5 1993 sdata_lock(sdata);
77fdaa12
JB		 1994
1995 if (!ifmgd->associated)
1996 goto out;
1997
133d40f9
SG		 1998 mutex_lock(&sdata->local->mtx);
1999
2000 if (sdata->local->tmp_channel || sdata->local->scanning) {
2001 mutex_unlock(&sdata->local->mtx);
2002 goto out;
2003 }
2004
a13fbe54 2005 if (beacon) {
bdcbd8e0 2006 mlme_dbg_ratelimited(sdata,
59c1ec2b
BG		 2007 "detected beacon loss from AP (missed %d beacons) - probing\n",
2008 beacon_loss_count);
bdcbd8e0 2009
a13fbe54
BG		 2010 ieee80211_cqm_rssi_notify(&sdata->vif,
2011 NL80211_CQM_RSSI_BEACON_LOSS_EVENT,
2012 GFP_KERNEL);
2013 }
04de8381 2014
b291ba11
JB		 2015 /*
2016 * The driver/our work has already reported this event or the
2017 * connection monitoring has kicked in and we have already sent
2018 * a probe request. Or maybe the AP died and the driver keeps
2019 * reporting until we disassociate...
2020 *
2021 * In either case we have to ignore the current call to this
2022 * function (except for setting the correct probe reason bit)
2023 * because otherwise we would reset the timer every time and
2024 * never check whether we received a probe response!
2025 */
392b9ffb 2026 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
b291ba11
JB		 2027 already = true;
2028
12b5f34d
EP		 2029 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2030
133d40f9
SG		 2031 mutex_unlock(&sdata->local->mtx);
2032
b291ba11
JB		 2033 if (already)
2034 goto out;
2035
4e751843
JB		 2036 mutex_lock(&sdata->local->iflist_mtx);
2037 ieee80211_recalc_ps(sdata->local, -1);
2038 mutex_unlock(&sdata->local->iflist_mtx);
2039
a43abf29
ML		 2040 ifmgd->probe_send_count = 0;
2041 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12 2042 out:
8d61ffa5 2043 sdata_unlock(sdata);
04de8381
KV		 2044}
2045
a619a4c0
JO		 2046struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2047 struct ieee80211_vif *vif)
2048{
2049 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2050 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d9b3b28b 2051 struct cfg80211_bss *cbss;
a619a4c0
JO		 2052 struct sk_buff *skb;
2053 const u8 *ssid;
88c868c4 2054 int ssid_len;
a619a4c0
JO		 2055
2056 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2057 return NULL;
2058
8d61ffa5 2059 sdata_assert_lock(sdata);
a619a4c0 2060
d9b3b28b
EP		 2061 if (ifmgd->associated)
2062 cbss = ifmgd->associated;
2063 else if (ifmgd->auth_data)
2064 cbss = ifmgd->auth_data->bss;
2065 else if (ifmgd->assoc_data)
2066 cbss = ifmgd->assoc_data->bss;
2067 else
a619a4c0
JO		 2068 return NULL;
2069
9caf0364 2070 rcu_read_lock();
d9b3b28b 2071 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
88c868c4
SG		 2072 if (WARN_ON_ONCE(ssid == NULL))
2073 ssid_len = 0;
2074 else
2075 ssid_len = ssid[1];
2076
d9b3b28b 2077 skb = ieee80211_build_probe_req(sdata, cbss->bssid,
55de908a 2078 (u32) -1, cbss->channel,
6b77863b 2079 ssid + 2, ssid_len,
85a237fe 2080 NULL, 0, true);
9caf0364 2081 rcu_read_unlock();
a619a4c0
JO		 2082
2083 return skb;
2084}
2085EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2086
eef9e54c 2087static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
1e4dcd01 2088{
59af6928 2089 struct ieee80211_local *local = sdata->local;
1e4dcd01 2090 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 2091 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
1e4dcd01 2092
8d61ffa5 2093 sdata_lock(sdata);
1e4dcd01 2094 if (!ifmgd->associated) {
8d61ffa5 2095 sdata_unlock(sdata);
1e4dcd01
JO		 2096 return;
2097 }
2098
37ad3888
JB		 2099 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2100 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
eef9e54c 2101 true, frame_buf);
882a7c69 2102 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
59af6928
MK		 2103
2104 mutex_lock(&local->mtx);
7578d575 2105 sdata->vif.csa_active = false;
a46992b4
LC		 2106 if (sdata->csa_block_tx) {
2107 ieee80211_wake_vif_queues(local, sdata,
2108 IEEE80211_QUEUE_STOP_REASON_CSA);
2109 sdata->csa_block_tx = false;
2110 }
59af6928 2111 mutex_unlock(&local->mtx);
7da7cc1d 2112
6ff57cf8
JB		 2113 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
2114 IEEE80211_DEAUTH_FRAME_LEN);
8d61ffa5 2115 sdata_unlock(sdata);
1e4dcd01
JO		 2116}
2117
cc74c0c7 2118static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 2119{
2120 struct ieee80211_sub_if_data *sdata =
2121 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 2122 u.mgd.beacon_connection_loss_work);
a85e1d55
PS		 2123 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2124 struct sta_info *sta;
2125
2126 if (ifmgd->associated) {
30fa9047 2127 rcu_read_lock();
a85e1d55
PS		 2128 sta = sta_info_get(sdata, ifmgd->bssid);
2129 if (sta)
2130 sta->beacon_loss_count++;
30fa9047 2131 rcu_read_unlock();
a85e1d55 2132 }
b291ba11 2133
682bd38b 2134 if (ifmgd->connection_loss) {
882a7c69
JB		 2135 sdata_info(sdata, "Connection to AP %pM lost\n",
2136 ifmgd->bssid);
eef9e54c 2137 __ieee80211_disconnect(sdata);
882a7c69 2138 } else {
1e4dcd01 2139 ieee80211_mgd_probe_ap(sdata, true);
882a7c69
JB		 2140 }
2141}
2142
2143static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2144{
2145 struct ieee80211_sub_if_data *sdata =
2146 container_of(work, struct ieee80211_sub_if_data,
2147 u.mgd.csa_connection_drop_work);
2148
eef9e54c 2149 __ieee80211_disconnect(sdata);
b291ba11
JB		 2150}
2151
04de8381
KV		 2152void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2153{
2154 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 2155 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 2156
b5878a2d
JB		 2157 trace_api_beacon_loss(sdata);
2158
682bd38b 2159 sdata->u.mgd.connection_loss = false;
1e4dcd01 2160 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 2161}
2162EXPORT_SYMBOL(ieee80211_beacon_loss);
2163
1e4dcd01
JO		 2164void ieee80211_connection_loss(struct ieee80211_vif *vif)
2165{
2166 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2167 struct ieee80211_hw *hw = &sdata->local->hw;
2168
b5878a2d
JB		 2169 trace_api_connection_loss(sdata);
2170
682bd38b 2171 sdata->u.mgd.connection_loss = true;
1e4dcd01
JO		 2172 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2173}
2174EXPORT_SYMBOL(ieee80211_connection_loss);
2175
2176
66e67e41
JB		 2177static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2178 bool assoc)
2179{
2180 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2181
8d61ffa5 2182 sdata_assert_lock(sdata);
66e67e41 2183
66e67e41
JB		 2184 if (!assoc) {
2185 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2186
2187 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2188 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
028e8da0 2189 sdata->u.mgd.flags = 0;
34a3740d 2190 mutex_lock(&sdata->local->mtx);
55de908a 2191 ieee80211_vif_release_channel(sdata);
34a3740d 2192 mutex_unlock(&sdata->local->mtx);
66e67e41
JB		 2193 }
2194
5b112d3d 2195 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
66e67e41
JB		 2196 kfree(auth_data);
2197 sdata->u.mgd.auth_data = NULL;
2198}
2199
2200static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2201 struct ieee80211_mgmt *mgmt, size_t len)
2202{
1672c0e3 2203 struct ieee80211_local *local = sdata->local;
66e67e41
JB		 2204 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2205 u8 *pos;
2206 struct ieee802_11_elems elems;
1672c0e3 2207 u32 tx_flags = 0;
66e67e41
JB		 2208
2209 pos = mgmt->u.auth.variable;
b2e506bf 2210 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
66e67e41
JB		 2211 if (!elems.challenge)
2212 return;
2213 auth_data->expected_transaction = 4;
a1845fc7 2214 drv_mgd_prepare_tx(sdata->local, sdata);
1672c0e3
JB		 2215 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2216 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2217 IEEE80211_TX_INTFL_MLME_CONN_TX;
700e8ea6 2218 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
66e67e41
JB		 2219 elems.challenge - 2, elems.challenge_len + 2,
2220 auth_data->bss->bssid, auth_data->bss->bssid,
2221 auth_data->key, auth_data->key_len,
1672c0e3 2222 auth_data->key_idx, tx_flags);
66e67e41
JB		 2223}
2224
8d61ffa5
JB		 2225static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2226 struct ieee80211_mgmt *mgmt, size_t len)
66e67e41
JB		 2227{
2228 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2229 u8 bssid[ETH_ALEN];
2230 u16 auth_alg, auth_transaction, status_code;
2231 struct sta_info *sta;
2232
8d61ffa5 2233 sdata_assert_lock(sdata);
66e67e41
JB		 2234
2235 if (len < 24 + 6)
8d61ffa5 2236 return;
66e67e41
JB		 2237
2238 if (!ifmgd->auth_data || ifmgd->auth_data->done)
8d61ffa5 2239 return;
66e67e41
JB		 2240
2241 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2242
b203ca39 2243 if (!ether_addr_equal(bssid, mgmt->bssid))
8d61ffa5 2244 return;
66e67e41
JB		 2245
2246 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2247 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2248 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2249
2250 if (auth_alg != ifmgd->auth_data->algorithm ||
0f4126e8
JM		 2251 auth_transaction != ifmgd->auth_data->expected_transaction) {
2252 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2253 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2254 auth_transaction,
2255 ifmgd->auth_data->expected_transaction);
8d61ffa5 2256 return;
0f4126e8 2257 }
66e67e41
JB		 2258
2259 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2260 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2261 mgmt->sa, status_code);
dac211ec 2262 ieee80211_destroy_auth_data(sdata, false);
6ff57cf8 2263 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
8d61ffa5 2264 return;
66e67e41
JB		 2265 }
2266
2267 switch (ifmgd->auth_data->algorithm) {
2268 case WLAN_AUTH_OPEN:
2269 case WLAN_AUTH_LEAP:
2270 case WLAN_AUTH_FT:
6b8ece3a 2271 case WLAN_AUTH_SAE:
66e67e41
JB		 2272 break;
2273 case WLAN_AUTH_SHARED_KEY:
2274 if (ifmgd->auth_data->expected_transaction != 4) {
2275 ieee80211_auth_challenge(sdata, mgmt, len);
2276 /* need another frame */
8d61ffa5 2277 return;
66e67e41
JB		 2278 }
2279 break;
2280 default:
2281 WARN_ONCE(1, "invalid auth alg %d",
2282 ifmgd->auth_data->algorithm);
8d61ffa5 2283 return;
66e67e41
JB		 2284 }
2285
bdcbd8e0 2286 sdata_info(sdata, "authenticated\n");
66e67e41
JB		 2287 ifmgd->auth_data->done = true;
2288 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
89afe614 2289 ifmgd->auth_data->timeout_started = true;
8d61ffa5 2290 run_again(sdata, ifmgd->auth_data->timeout);
66e67e41 2291
6b8ece3a
JM		 2292 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2293 ifmgd->auth_data->expected_transaction != 2) {
2294 /*
2295 * Report auth frame to user space for processing since another
2296 * round of Authentication frames is still needed.
2297 */
6ff57cf8 2298 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
8d61ffa5 2299 return;
6b8ece3a
JM		 2300 }
2301
66e67e41
JB		 2302 /* move station state to auth */
2303 mutex_lock(&sdata->local->sta_mtx);
2304 sta = sta_info_get(sdata, bssid);
2305 if (!sta) {
2306 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2307 goto out_err;
2308 }
2309 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
bdcbd8e0 2310 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
66e67e41
JB		 2311 goto out_err;
2312 }
2313 mutex_unlock(&sdata->local->sta_mtx);
2314
6ff57cf8 2315 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
8d61ffa5 2316 return;
66e67e41
JB		 2317 out_err:
2318 mutex_unlock(&sdata->local->sta_mtx);
2319 /* ignore frame -- wait for timeout */
66e67e41
JB		 2320}
2321
dfa1ad29
CO		 2322#define case_WLAN(type) \
2323 case WLAN_REASON_##type: return #type
2324
2325static const char *ieee80211_get_reason_code_string(u16 reason_code)
2326{
2327 switch (reason_code) {
2328 case_WLAN(UNSPECIFIED);
2329 case_WLAN(PREV_AUTH_NOT_VALID);
2330 case_WLAN(DEAUTH_LEAVING);
2331 case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2332 case_WLAN(DISASSOC_AP_BUSY);
2333 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2334 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2335 case_WLAN(DISASSOC_STA_HAS_LEFT);
2336 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2337 case_WLAN(DISASSOC_BAD_POWER);
2338 case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2339 case_WLAN(INVALID_IE);
2340 case_WLAN(MIC_FAILURE);
2341 case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2342 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2343 case_WLAN(IE_DIFFERENT);
2344 case_WLAN(INVALID_GROUP_CIPHER);
2345 case_WLAN(INVALID_PAIRWISE_CIPHER);
2346 case_WLAN(INVALID_AKMP);
2347 case_WLAN(UNSUPP_RSN_VERSION);
2348 case_WLAN(INVALID_RSN_IE_CAP);
2349 case_WLAN(IEEE8021X_FAILED);
2350 case_WLAN(CIPHER_SUITE_REJECTED);
2351 case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2352 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2353 case_WLAN(DISASSOC_LOW_ACK);
2354 case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2355 case_WLAN(QSTA_LEAVE_QBSS);
2356 case_WLAN(QSTA_NOT_USE);
2357 case_WLAN(QSTA_REQUIRE_SETUP);
2358 case_WLAN(QSTA_TIMEOUT);
2359 case_WLAN(QSTA_CIPHER_NOT_SUPP);
2360 case_WLAN(MESH_PEER_CANCELED);
2361 case_WLAN(MESH_MAX_PEERS);
2362 case_WLAN(MESH_CONFIG);
2363 case_WLAN(MESH_CLOSE);
2364 case_WLAN(MESH_MAX_RETRIES);
2365 case_WLAN(MESH_CONFIRM_TIMEOUT);
2366 case_WLAN(MESH_INVALID_GTK);
2367 case_WLAN(MESH_INCONSISTENT_PARAM);
2368 case_WLAN(MESH_INVALID_SECURITY);
2369 case_WLAN(MESH_PATH_ERROR);
2370 case_WLAN(MESH_PATH_NOFORWARD);
2371 case_WLAN(MESH_PATH_DEST_UNREACHABLE);
2372 case_WLAN(MAC_EXISTS_IN_MBSS);
2373 case_WLAN(MESH_CHAN_REGULATORY);
2374 case_WLAN(MESH_CHAN);
2375 default: return "<unknown>";
2376 }
2377}
66e67e41 2378
8d61ffa5
JB		 2379static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2380 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2381{
46900298 2382 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 2383 const u8 *bssid = NULL;
f0706e82
JB		 2384 u16 reason_code;
2385
8d61ffa5 2386 sdata_assert_lock(sdata);
66e67e41 2387
f4ea83dd 2388 if (len < 24 + 2)
8d61ffa5 2389 return;
f0706e82 2390
66e67e41 2391 if (!ifmgd->associated ||
b203ca39 2392 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
8d61ffa5 2393 return;
77fdaa12 2394
0c1ad2ca 2395 bssid = ifmgd->associated->bssid;
f0706e82
JB		 2396
2397 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2398
dfa1ad29
CO		 2399 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
2400 bssid, reason_code, ieee80211_get_reason_code_string(reason_code));
77fdaa12 2401
37ad3888
JB		 2402 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2403
6ff57cf8 2404 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
f0706e82
JB		 2405}
2406
2407
8d61ffa5
JB		 2408static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2409 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2410{
46900298 2411 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 2412 u16 reason_code;
2413
8d61ffa5 2414 sdata_assert_lock(sdata);
77fdaa12 2415
66e67e41 2416 if (len < 24 + 2)
8d61ffa5 2417 return;
77fdaa12 2418
66e67e41 2419 if (!ifmgd->associated ||
b203ca39 2420 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
8d61ffa5 2421 return;
f0706e82
JB		 2422
2423 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2424
bdcbd8e0
JB		 2425 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2426 mgmt->sa, reason_code);
f0706e82 2427
37ad3888
JB		 2428 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2429
6ff57cf8 2430 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
f0706e82
JB		 2431}
2432
c74d084f
CL		 2433static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2434 u8 *supp_rates, unsigned int supp_rates_len,
2435 u32 *rates, u32 *basic_rates,
2436 bool *have_higher_than_11mbit,
2103dec1
SW		 2437 int *min_rate, int *min_rate_index,
2438 int shift, u32 rate_flags)
c74d084f
CL		 2439{
2440 int i, j;
2441
2442 for (i = 0; i < supp_rates_len; i++) {
2103dec1 2443 int rate = supp_rates[i] & 0x7f;
c74d084f
CL		 2444 bool is_basic = !!(supp_rates[i] & 0x80);
2445
2103dec1 2446 if ((rate * 5 * (1 << shift)) > 110)
c74d084f
CL		 2447 *have_higher_than_11mbit = true;
2448
2449 /*
2450 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2451 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2452 *
2453 * Note: Even through the membership selector and the basic
2454 * rate flag share the same bit, they are not exactly
2455 * the same.
2456 */
2457 if (!!(supp_rates[i] & 0x80) &&
2458 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2459 continue;
2460
2461 for (j = 0; j < sband->n_bitrates; j++) {
2103dec1
SW		 2462 struct ieee80211_rate *br;
2463 int brate;
2464
2465 br = &sband->bitrates[j];
2466 if ((rate_flags & br->flags) != rate_flags)
2467 continue;
2468
2469 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2470 if (brate == rate) {
c74d084f
CL		 2471 *rates |= BIT(j);
2472 if (is_basic)
2473 *basic_rates |= BIT(j);
2103dec1
SW		 2474 if ((rate * 5) < *min_rate) {
2475 *min_rate = rate * 5;
c74d084f
CL		 2476 *min_rate_index = j;
2477 }
2478 break;
2479 }
2480 }
2481 }
2482}
f0706e82 2483
66e67e41
JB		 2484static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2485 bool assoc)
2486{
2487 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2488
8d61ffa5 2489 sdata_assert_lock(sdata);
66e67e41 2490
66e67e41
JB		 2491 if (!assoc) {
2492 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2493
2494 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2495 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
028e8da0 2496 sdata->u.mgd.flags = 0;
34a3740d 2497 mutex_lock(&sdata->local->mtx);
55de908a 2498 ieee80211_vif_release_channel(sdata);
34a3740d 2499 mutex_unlock(&sdata->local->mtx);
66e67e41
JB		 2500 }
2501
2502 kfree(assoc_data);
2503 sdata->u.mgd.assoc_data = NULL;
2504}
2505
2506static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2507 struct cfg80211_bss *cbss,
af6b6374 2508 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2509{
46900298 2510 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 2511 struct ieee80211_local *local = sdata->local;
8318d78a 2512 struct ieee80211_supported_band *sband;
f0706e82 2513 struct sta_info *sta;
af6b6374 2514 u8 *pos;
af6b6374 2515 u16 capab_info, aid;
f0706e82 2516 struct ieee802_11_elems elems;
bda3933a 2517 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
35d865af
JB		 2518 const struct cfg80211_bss_ies *bss_ies = NULL;
2519 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
ae5eb026 2520 u32 changed = 0;
c74d084f 2521 int err;
35d865af 2522 bool ret;
f0706e82 2523
af6b6374 2524 /* AssocResp and ReassocResp have identical structure */
f0706e82 2525
f0706e82 2526 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 2527 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 2528
1dd84aa2 2529 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
bdcbd8e0
JB		 2530 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2531 aid);
1dd84aa2
JB		 2532 aid &= ~(BIT(15) | BIT(14));
2533
05cb9108
JB		 2534 ifmgd->broken_ap = false;
2535
2536 if (aid == 0 || aid > IEEE80211_MAX_AID) {
bdcbd8e0
JB		 2537 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2538 aid);
05cb9108
JB		 2539 aid = 0;
2540 ifmgd->broken_ap = true;
2541 }
2542
af6b6374 2543 pos = mgmt->u.assoc_resp.variable;
b2e506bf 2544 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
af6b6374 2545
f0706e82 2546 if (!elems.supp_rates) {
bdcbd8e0 2547 sdata_info(sdata, "no SuppRates element in AssocResp\n");
af6b6374 2548 return false;
f0706e82
JB		 2549 }
2550
46900298 2551 ifmgd->aid = aid;
f0706e82 2552
35d865af
JB		 2553 /*
2554 * Some APs are erroneously not including some information in their
2555 * (re)association response frames. Try to recover by using the data
2556 * from the beacon or probe response. This seems to afflict mobile
2557 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2558 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2559 */
2560 if ((assoc_data->wmm && !elems.wmm_param) ||
2561 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2562 (!elems.ht_cap_elem || !elems.ht_operation)) ||
2563 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2564 (!elems.vht_cap_elem || !elems.vht_operation))) {
2565 const struct cfg80211_bss_ies *ies;
2566 struct ieee802_11_elems bss_elems;
2567
2568 rcu_read_lock();
2569 ies = rcu_dereference(cbss->ies);
2570 if (ies)
2571 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2572 GFP_ATOMIC);
2573 rcu_read_unlock();
2574 if (!bss_ies)
2575 return false;
2576
2577 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2578 false, &bss_elems);
2579 if (assoc_data->wmm &&
2580 !elems.wmm_param && bss_elems.wmm_param) {
2581 elems.wmm_param = bss_elems.wmm_param;
2582 sdata_info(sdata,
2583 "AP bug: WMM param missing from AssocResp\n");
2584 }
2585
2586 /*
2587 * Also check if we requested HT/VHT, otherwise the AP doesn't
2588 * have to include the IEs in the (re)association response.
2589 */
2590 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2591 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2592 elems.ht_cap_elem = bss_elems.ht_cap_elem;
2593 sdata_info(sdata,
2594 "AP bug: HT capability missing from AssocResp\n");
2595 }
2596 if (!elems.ht_operation && bss_elems.ht_operation &&
2597 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2598 elems.ht_operation = bss_elems.ht_operation;
2599 sdata_info(sdata,
2600 "AP bug: HT operation missing from AssocResp\n");
2601 }
2602 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2603 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2604 elems.vht_cap_elem = bss_elems.vht_cap_elem;
2605 sdata_info(sdata,
2606 "AP bug: VHT capa missing from AssocResp\n");
2607 }
2608 if (!elems.vht_operation && bss_elems.vht_operation &&
2609 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2610 elems.vht_operation = bss_elems.vht_operation;
2611 sdata_info(sdata,
2612 "AP bug: VHT operation missing from AssocResp\n");
2613 }
2614 }
2615
30eb1dc2
JB		 2616 /*
2617 * We previously checked these in the beacon/probe response, so
2618 * they should be present here. This is just a safety net.
2619 */
2620 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2621 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2622 sdata_info(sdata,
35d865af
JB		 2623 "HT AP is missing WMM params or HT capability/operation\n");
2624 ret = false;
2625 goto out;
30eb1dc2
JB		 2626 }
2627
2628 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2629 (!elems.vht_cap_elem || !elems.vht_operation)) {
2630 sdata_info(sdata,
35d865af
JB		 2631 "VHT AP is missing VHT capability/operation\n");
2632 ret = false;
2633 goto out;
30eb1dc2
JB		 2634 }
2635
2a33bee2
GE		 2636 mutex_lock(&sdata->local->sta_mtx);
2637 /*
2638 * station info was already allocated and inserted before
2639 * the association and should be available to us
2640 */
7852e361 2641 sta = sta_info_get(sdata, cbss->bssid);
2a33bee2
GE		 2642 if (WARN_ON(!sta)) {
2643 mutex_unlock(&sdata->local->sta_mtx);
35d865af
JB		 2644 ret = false;
2645 goto out;
77fdaa12 2646 }
05e5e883 2647
55de908a 2648 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
f709fc69 2649
30eb1dc2 2650 /* Set up internal HT/VHT capabilities */
a8243b72 2651 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
ef96a842 2652 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
e1a0c6b3 2653 elems.ht_cap_elem, sta);
64f68e5d 2654
818255ea
MP		 2655 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2656 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
4a34215e 2657 elems.vht_cap_elem, sta);
818255ea 2658
30eb1dc2
JB		 2659 /*
2660 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
2661 * in their association response, so ignore that data for our own
2662 * configuration. If it changed since the last beacon, we'll get the
2663 * next beacon and update then.
2664 */
1128958d 2665
bee7f586
JB		 2666 /*
2667 * If an operating mode notification IE is present, override the
2668 * NSS calculation (that would be done in rate_control_rate_init())
2669 * and use the # of streams from that element.
2670 */
2671 if (elems.opmode_notif &&
2672 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
2673 u8 nss;
2674
2675 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
2676 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
2677 nss += 1;
2678 sta->sta.rx_nss = nss;
2679 }
2680
4b7679a5 2681 rate_control_rate_init(sta);
f0706e82 2682
46900298 2683 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
c2c98fde 2684 set_sta_flag(sta, WLAN_STA_MFP);
5394af4d 2685
ddf4ac53 2686 if (elems.wmm_param)
c2c98fde 2687 set_sta_flag(sta, WLAN_STA_WME);
ddf4ac53 2688
3e4d40fa 2689 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
c8987876
JB		 2690 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2691 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2692 if (err) {
bdcbd8e0
JB		 2693 sdata_info(sdata,
2694 "failed to move station %pM to desired state\n",
2695 sta->sta.addr);
c8987876
JB		 2696 WARN_ON(__sta_info_destroy(sta));
2697 mutex_unlock(&sdata->local->sta_mtx);
35d865af
JB		 2698 ret = false;
2699 goto out;
c8987876
JB		 2700 }
2701
7852e361 2702 mutex_unlock(&sdata->local->sta_mtx);
ddf4ac53 2703
f2176d72
JO		 2704 /*
2705 * Always handle WMM once after association regardless
2706 * of the first value the AP uses. Setting -1 here has
2707 * that effect because the AP values is an unsigned
2708 * 4-bit value.
2709 */
2710 ifmgd->wmm_last_param_set = -1;
2711
095d81ce 2712 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && elems.wmm_param)
4ced3f74 2713 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 2714 elems.wmm_param_len);
aa837e1d 2715 else
3abead59
JB		 2716 ieee80211_set_wmm_default(sdata, false);
2717 changed |= BSS_CHANGED_QOS;
f0706e82 2718
60f8b39c
JB		 2719 /* set AID and assoc capability,
2720 * ieee80211_set_associated() will tell the driver */
2721 bss_conf->aid = aid;
2722 bss_conf->assoc_capability = capab_info;
0c1ad2ca 2723 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 2724
d524215f
FF		 2725 /*
2726 * If we're using 4-addr mode, let the AP know that we're
2727 * doing so, so that it can create the STA VLAN on its side
2728 */
2729 if (ifmgd->use_4addr)
2730 ieee80211_send_4addr_nullfunc(local, sdata);
2731
15b7b062 2732 /*
b291ba11
JB		 2733 * Start timer to probe the connection to the AP now.
2734 * Also start the timer that will detect beacon loss.
15b7b062 2735 */
b291ba11 2736 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 2737 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 2738
35d865af
JB		 2739 ret = true;
2740 out:
2741 kfree(bss_ies);
2742 return ret;
f0706e82
JB		 2743}
2744
8d61ffa5
JB		 2745static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2746 struct ieee80211_mgmt *mgmt,
2747 size_t len)
66e67e41
JB		 2748{
2749 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2750 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2751 u16 capab_info, status_code, aid;
2752 struct ieee802_11_elems elems;
2753 u8 *pos;
2754 bool reassoc;
8d61ffa5 2755 struct cfg80211_bss *bss;
66e67e41 2756
8d61ffa5 2757 sdata_assert_lock(sdata);
66e67e41
JB		 2758
2759 if (!assoc_data)
8d61ffa5 2760 return;
b203ca39 2761 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
8d61ffa5 2762 return;
66e67e41
JB		 2763
2764 /*
2765 * AssocResp and ReassocResp have identical structure, so process both
2766 * of them in this function.
2767 */
2768
2769 if (len < 24 + 6)
8d61ffa5 2770 return;
66e67e41
JB		 2771
2772 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2773 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2774 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2775 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2776
bdcbd8e0
JB		 2777 sdata_info(sdata,
2778 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2779 reassoc ? "Rea" : "A", mgmt->sa,
2780 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
66e67e41
JB		 2781
2782 pos = mgmt->u.assoc_resp.variable;
b2e506bf 2783 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
66e67e41
JB		 2784
2785 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
79ba1d89
JB		 2786 elems.timeout_int &&
2787 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
66e67e41 2788 u32 tu, ms;
79ba1d89 2789 tu = le32_to_cpu(elems.timeout_int->value);
66e67e41 2790 ms = tu * 1024 / 1000;
bdcbd8e0
JB		 2791 sdata_info(sdata,
2792 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2793 mgmt->sa, tu, ms);
66e67e41 2794 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
89afe614 2795 assoc_data->timeout_started = true;
66e67e41 2796 if (ms > IEEE80211_ASSOC_TIMEOUT)
8d61ffa5
JB		 2797 run_again(sdata, assoc_data->timeout);
2798 return;
66e67e41
JB		 2799 }
2800
8d61ffa5 2801 bss = assoc_data->bss;
66e67e41
JB		 2802
2803 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2804 sdata_info(sdata, "%pM denied association (code=%d)\n",
2805 mgmt->sa, status_code);
66e67e41
JB		 2806 ieee80211_destroy_assoc_data(sdata, false);
2807 } else {
8d61ffa5 2808 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
66e67e41 2809 /* oops -- internal error -- send timeout for now */
10a9109f 2810 ieee80211_destroy_assoc_data(sdata, false);
959867fa 2811 cfg80211_assoc_timeout(sdata->dev, bss);
8d61ffa5 2812 return;
66e67e41 2813 }
635d999f 2814 sdata_info(sdata, "associated\n");
79ebfb85
JB		 2815
2816 /*
2817 * destroy assoc_data afterwards, as otherwise an idle
2818 * recalc after assoc_data is NULL but before associated
2819 * is set can cause the interface to go idle
2820 */
2821 ieee80211_destroy_assoc_data(sdata, true);
66e67e41
JB		 2822 }
2823
6ff57cf8 2824 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len);
66e67e41 2825}
8e3c1b77 2826
98c8fccf 2827static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
8e3c1b77 2828 struct ieee80211_mgmt *mgmt, size_t len,
98c8fccf 2829 struct ieee80211_rx_status *rx_status,
d45c4172 2830 struct ieee802_11_elems *elems)
98c8fccf
JB		 2831{
2832 struct ieee80211_local *local = sdata->local;
c2b13452 2833 struct ieee80211_bss *bss;
98c8fccf 2834 struct ieee80211_channel *channel;
56007a02 2835
8d61ffa5 2836 sdata_assert_lock(sdata);
b4f286a1 2837
3afc2167
EG		 2838 channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
2839 if (!channel)
98c8fccf
JB		 2840 return;
2841
98c8fccf 2842 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
d45c4172 2843 channel);
817cee76 2844 if (bss) {
817cee76 2845 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
d2722f8b 2846 ieee80211_rx_bss_put(local, bss);
817cee76 2847 }
f0706e82
JB		 2848}
2849
2850
f698d856 2851static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 2852 struct sk_buff *skb)
f0706e82 2853{
af6b6374 2854 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 2855 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 2856 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2857 size_t baselen, len = skb->len;
ae6a44e3
EK		 2858 struct ieee802_11_elems elems;
2859
15b7b062
KV		 2860 ifmgd = &sdata->u.mgd;
2861
8d61ffa5 2862 sdata_assert_lock(sdata);
77fdaa12 2863
b203ca39 2864 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
8e7cdbb6
TW		 2865 return; /* ignore ProbeResp to foreign address */
2866
ae6a44e3
EK		 2867 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2868 if (baselen > len)
2869 return;
2870
2871 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
b2e506bf 2872 false, &elems);
ae6a44e3 2873
d45c4172 2874 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
9859b81e 2875
77fdaa12 2876 if (ifmgd->associated &&
b203ca39 2877 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
4e5ff376 2878 ieee80211_reset_ap_probe(sdata);
66e67e41
JB		 2879
2880 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
b203ca39 2881 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
66e67e41 2882 /* got probe response, continue with auth */
bdcbd8e0 2883 sdata_info(sdata, "direct probe responded\n");
66e67e41
JB		 2884 ifmgd->auth_data->tries = 0;
2885 ifmgd->auth_data->timeout = jiffies;
89afe614 2886 ifmgd->auth_data->timeout_started = true;
8d61ffa5 2887 run_again(sdata, ifmgd->auth_data->timeout);
66e67e41 2888 }
f0706e82
JB		 2889}
2890
d91f36db
JB		 2891/*
2892 * This is the canonical list of information elements we care about,
2893 * the filter code also gives us all changes to the Microsoft OUI
2894 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2895 *
2896 * We implement beacon filtering in software since that means we can
2897 * avoid processing the frame here and in cfg80211, and userspace
2898 * will not be able to tell whether the hardware supports it or not.
2899 *
2900 * XXX: This list needs to be dynamic -- userspace needs to be able to
2901 * add items it requires. It also needs to be able to tell us to
2902 * look out for other vendor IEs.
2903 */
2904static const u64 care_about_ies =
1d4df3a5
JB		 2905 (1ULL << WLAN_EID_COUNTRY) |
2906 (1ULL << WLAN_EID_ERP_INFO) |
2907 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2908 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2909 (1ULL << WLAN_EID_HT_CAPABILITY) |
074d46d1 2910 (1ULL << WLAN_EID_HT_OPERATION);
d91f36db 2911
8d61ffa5
JB		 2912static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
2913 struct ieee80211_mgmt *mgmt, size_t len,
2914 struct ieee80211_rx_status *rx_status)
f0706e82 2915{
d91f36db 2916 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 2917 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 2918 size_t baselen;
2919 struct ieee802_11_elems elems;
f698d856 2920 struct ieee80211_local *local = sdata->local;
55de908a
JB		 2921 struct ieee80211_chanctx_conf *chanctx_conf;
2922 struct ieee80211_channel *chan;
bee7f586 2923 struct sta_info *sta;
471b3efd 2924 u32 changed = 0;
f87ad637 2925 bool erp_valid;
7a5158ef 2926 u8 erp_value = 0;
d91f36db 2927 u32 ncrc;
77fdaa12 2928 u8 *bssid;
8d61ffa5 2929 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
77fdaa12 2930
8d61ffa5 2931 sdata_assert_lock(sdata);
f0706e82 2932
ae6a44e3
EK		 2933 /* Process beacon from the current BSS */
2934 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2935 if (baselen > len)
8d61ffa5 2936 return;
ae6a44e3 2937
55de908a
JB		 2938 rcu_read_lock();
2939 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2940 if (!chanctx_conf) {
2941 rcu_read_unlock();
8d61ffa5 2942 return;
55de908a
JB		 2943 }
2944
4bf88530 2945 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
55de908a 2946 rcu_read_unlock();
8d61ffa5 2947 return;
55de908a 2948 }
4bf88530 2949 chan = chanctx_conf->def.chan;
55de908a 2950 rcu_read_unlock();
f0706e82 2951
c65dd147 2952 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
b203ca39 2953 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
66e67e41 2954 ieee802_11_parse_elems(mgmt->u.beacon.variable,
b2e506bf 2955 len - baselen, false, &elems);
77fdaa12 2956
d45c4172 2957 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
482a9c74
AB		 2958 if (elems.tim && !elems.parse_error) {
2959 const struct ieee80211_tim_ie *tim_ie = elems.tim;
2960 ifmgd->dtim_period = tim_ie->dtim_period;
2961 }
989c6505 2962 ifmgd->have_beacon = true;
c65dd147 2963 ifmgd->assoc_data->need_beacon = false;
ef429dad
JB		 2964 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
2965 sdata->vif.bss_conf.sync_tsf =
2966 le64_to_cpu(mgmt->u.beacon.timestamp);
2967 sdata->vif.bss_conf.sync_device_ts =
2968 rx_status->device_timestamp;
2969 if (elems.tim)
2970 sdata->vif.bss_conf.sync_dtim_count =
2971 elems.tim->dtim_count;
2972 else
2973 sdata->vif.bss_conf.sync_dtim_count = 0;
2974 }
66e67e41
JB		 2975 /* continue assoc process */
2976 ifmgd->assoc_data->timeout = jiffies;
89afe614 2977 ifmgd->assoc_data->timeout_started = true;
8d61ffa5
JB		 2978 run_again(sdata, ifmgd->assoc_data->timeout);
2979 return;
66e67e41 2980 }
77fdaa12 2981
66e67e41 2982 if (!ifmgd->associated ||
b203ca39 2983 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
8d61ffa5 2984 return;
66e67e41 2985 bssid = ifmgd->associated->bssid;
f0706e82 2986
17e4ec14
JM		 2987 /* Track average RSSI from the Beacon frames of the current AP */
2988 ifmgd->last_beacon_signal = rx_status->signal;
2989 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
2990 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3ba06c6f 2991 ifmgd->ave_beacon_signal = rx_status->signal * 16;
17e4ec14 2992 ifmgd->last_cqm_event_signal = 0;
391a200a 2993 ifmgd->count_beacon_signal = 1;
615f7b9b 2994 ifmgd->last_ave_beacon_signal = 0;
17e4ec14
JM		 2995 } else {
2996 ifmgd->ave_beacon_signal =
2997 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
2998 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
2999 ifmgd->ave_beacon_signal) / 16;
391a200a 3000 ifmgd->count_beacon_signal++;
17e4ec14 3001 }
615f7b9b
MV		 3002
3003 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3004 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3005 int sig = ifmgd->ave_beacon_signal;
3006 int last_sig = ifmgd->last_ave_beacon_signal;
3007
3008 /*
3009 * if signal crosses either of the boundaries, invoke callback
3010 * with appropriate parameters
3011 */
3012 if (sig > ifmgd->rssi_max_thold &&
3013 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3014 ifmgd->last_ave_beacon_signal = sig;
887da917 3015 drv_rssi_callback(local, sdata, RSSI_EVENT_HIGH);
615f7b9b
MV		 3016 } else if (sig < ifmgd->rssi_min_thold &&
3017 (last_sig >= ifmgd->rssi_max_thold ||
3018 last_sig == 0)) {
3019 ifmgd->last_ave_beacon_signal = sig;
887da917 3020 drv_rssi_callback(local, sdata, RSSI_EVENT_LOW);
615f7b9b
MV		 3021 }
3022 }
3023
17e4ec14 3024 if (bss_conf->cqm_rssi_thold &&
391a200a 3025 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
ea086359 3026 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
17e4ec14
JM		 3027 int sig = ifmgd->ave_beacon_signal / 16;
3028 int last_event = ifmgd->last_cqm_event_signal;
3029 int thold = bss_conf->cqm_rssi_thold;
3030 int hyst = bss_conf->cqm_rssi_hyst;
3031 if (sig < thold &&
3032 (last_event == 0 || sig < last_event - hyst)) {
3033 ifmgd->last_cqm_event_signal = sig;
3034 ieee80211_cqm_rssi_notify(
3035 &sdata->vif,
3036 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3037 GFP_KERNEL);
3038 } else if (sig > thold &&
3039 (last_event == 0 || sig > last_event + hyst)) {
3040 ifmgd->last_cqm_event_signal = sig;
3041 ieee80211_cqm_rssi_notify(
3042 &sdata->vif,
3043 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3044 GFP_KERNEL);
3045 }
3046 }
3047
392b9ffb 3048 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
bdcbd8e0 3049 mlme_dbg_ratelimited(sdata,
112c31f0 3050 "cancelling AP probe due to a received beacon\n");
392b9ffb 3051 ieee80211_reset_ap_probe(sdata);
92778180
JM		 3052 }
3053
b291ba11
JB		 3054 /*
3055 * Push the beacon loss detection into the future since
3056 * we are processing a beacon from the AP just now.
3057 */
d3a910a8 3058 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 3059
d91f36db
JB		 3060 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3061 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
b2e506bf 3062 len - baselen, false, &elems,
d91f36db
JB		 3063 care_about_ies, ncrc);
3064
25c9c875 3065 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
f87ad637
RR		 3066 bool directed_tim = ieee80211_check_tim(elems.tim,
3067 elems.tim_len,
3068 ifmgd->aid);
1fb3606b 3069 if (directed_tim) {
572e0012 3070 if (local->hw.conf.dynamic_ps_timeout > 0) {
70b12f26
RW		 3071 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3072 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3073 ieee80211_hw_config(local,
3074 IEEE80211_CONF_CHANGE_PS);
3075 }
572e0012 3076 ieee80211_send_nullfunc(local, sdata, 0);
6f0756a3 3077 } else if (!local->pspolling && sdata->u.mgd.powersave) {
572e0012
KV		 3078 local->pspolling = true;
3079
3080 /*
3081 * Here is assumed that the driver will be
3082 * able to send ps-poll frame and receive a
3083 * response even though power save mode is
3084 * enabled, but some drivers might require
3085 * to disable power save here. This needs
3086 * to be investigated.
3087 */
3088 ieee80211_send_pspoll(local, sdata);
3089 }
a97b77b9
VN		 3090 }
3091 }
7a5158ef 3092
488dd7b5 3093 if (sdata->vif.p2p) {
67baf663 3094 struct ieee80211_p2p_noa_attr noa = {};
488dd7b5
JB		 3095 int ret;
3096
3097 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3098 len - baselen,
3099 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
934457ee 3100 (u8 *) &noa, sizeof(noa));
67baf663
JD		 3101 if (ret >= 2) {
3102 if (sdata->u.mgd.p2p_noa_index != noa.index) {
3103 /* valid noa_attr and index changed */
3104 sdata->u.mgd.p2p_noa_index = noa.index;
3105 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3106 changed |= BSS_CHANGED_P2P_PS;
3107 /*
3108 * make sure we update all information, the CRC
3109 * mechanism doesn't look at P2P attributes.
3110 */
3111 ifmgd->beacon_crc_valid = false;
3112 }
3113 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3114 /* noa_attr not found and we had valid noa_attr before */
3115 sdata->u.mgd.p2p_noa_index = -1;
3116 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
488dd7b5 3117 changed |= BSS_CHANGED_P2P_PS;
488dd7b5
JB		 3118 ifmgd->beacon_crc_valid = false;
3119 }
3120 }
3121
d8ec4433 3122 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
8d61ffa5 3123 return;
30196673 3124 ifmgd->beacon_crc = ncrc;
d8ec4433 3125 ifmgd->beacon_crc_valid = true;
30196673 3126
d45c4172 3127 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
7d25745d 3128
d70b7616
JB		 3129 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
3130 &elems, true);
3131
095d81ce
JB		 3132 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3133 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
7d25745d
JB		 3134 elems.wmm_param_len))
3135 changed |= BSS_CHANGED_QOS;
3136
c65dd147
EG		 3137 /*
3138 * If we haven't had a beacon before, tell the driver about the
ef429dad 3139 * DTIM period (and beacon timing if desired) now.
c65dd147 3140 */
989c6505 3141 if (!ifmgd->have_beacon) {
c65dd147
EG		 3142 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3143 if (elems.tim)
3144 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3145 else
3146 bss_conf->dtim_period = 1;
ef429dad
JB		 3147
3148 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3149 sdata->vif.bss_conf.sync_tsf =
3150 le64_to_cpu(mgmt->u.beacon.timestamp);
3151 sdata->vif.bss_conf.sync_device_ts =
3152 rx_status->device_timestamp;
3153 if (elems.tim)
3154 sdata->vif.bss_conf.sync_dtim_count =
3155 elems.tim->dtim_count;
3156 else
3157 sdata->vif.bss_conf.sync_dtim_count = 0;
3158 }
3159
989c6505
AB		 3160 changed |= BSS_CHANGED_BEACON_INFO;
3161 ifmgd->have_beacon = true;
482a9c74
AB		 3162
3163 mutex_lock(&local->iflist_mtx);
3164 ieee80211_recalc_ps(local, -1);
3165 mutex_unlock(&local->iflist_mtx);
3166
ce857888 3167 ieee80211_recalc_ps_vif(sdata);
c65dd147
EG		 3168 }
3169
1946bed9 3170 if (elems.erp_info) {
7a5158ef
JB		 3171 erp_valid = true;
3172 erp_value = elems.erp_info[0];
3173 } else {
3174 erp_valid = false;
50c4afb9 3175 }
7a5158ef
JB		 3176 changed |= ieee80211_handle_bss_capability(sdata,
3177 le16_to_cpu(mgmt->u.beacon.capab_info),
3178 erp_valid, erp_value);
f0706e82 3179
1128958d 3180 mutex_lock(&local->sta_mtx);
bee7f586
JB		 3181 sta = sta_info_get(sdata, bssid);
3182
30eb1dc2
JB		 3183 if (ieee80211_config_bw(sdata, sta, elems.ht_operation,
3184 elems.vht_operation, bssid, &changed)) {
3185 mutex_unlock(&local->sta_mtx);
3186 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3187 WLAN_REASON_DEAUTH_LEAVING,
3188 true, deauth_buf);
6ff57cf8
JB		 3189 cfg80211_tx_mlme_mgmt(sdata->dev, deauth_buf,
3190 sizeof(deauth_buf));
8d61ffa5 3191 return;
30eb1dc2 3192 }
bee7f586
JB		 3193
3194 if (sta && elems.opmode_notif)
3195 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3196 rx_status->band, true);
1128958d 3197 mutex_unlock(&local->sta_mtx);
d3c990fb 3198
04b7b2ff
JB		 3199 if (elems.country_elem && elems.pwr_constr_elem &&
3200 mgmt->u.probe_resp.capab_info &
3201 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT))
1ea6f9c0
JB		 3202 changed |= ieee80211_handle_pwr_constr(sdata, chan,
3203 elems.country_elem,
3204 elems.country_elem_len,
3205 elems.pwr_constr_elem);
3f2355cb 3206
471b3efd 3207 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 3208}
3209
1fa57d01
JB		 3210void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3211 struct sk_buff *skb)
f0706e82
JB		 3212{
3213 struct ieee80211_rx_status *rx_status;
f0706e82
JB		 3214 struct ieee80211_mgmt *mgmt;
3215 u16 fc;
1b3a2e49
JB		 3216 struct ieee802_11_elems elems;
3217 int ies_len;
f0706e82 3218
f0706e82
JB		 3219 rx_status = (struct ieee80211_rx_status *) skb->cb;
3220 mgmt = (struct ieee80211_mgmt *) skb->data;
3221 fc = le16_to_cpu(mgmt->frame_control);
3222
8d61ffa5 3223 sdata_lock(sdata);
77fdaa12 3224
66e67e41
JB		 3225 switch (fc & IEEE80211_FCTL_STYPE) {
3226 case IEEE80211_STYPE_BEACON:
8d61ffa5 3227 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
66e67e41
JB		 3228 break;
3229 case IEEE80211_STYPE_PROBE_RESP:
3230 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3231 break;
3232 case IEEE80211_STYPE_AUTH:
8d61ffa5 3233 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
66e67e41
JB		 3234 break;
3235 case IEEE80211_STYPE_DEAUTH:
8d61ffa5 3236 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
66e67e41
JB		 3237 break;
3238 case IEEE80211_STYPE_DISASSOC:
8d61ffa5 3239 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
66e67e41
JB		 3240 break;
3241 case IEEE80211_STYPE_ASSOC_RESP:
3242 case IEEE80211_STYPE_REASSOC_RESP:
8d61ffa5 3243 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
66e67e41
JB		 3244 break;
3245 case IEEE80211_STYPE_ACTION:
37799e52 3246 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
1b3a2e49
JB		 3247 ies_len = skb->len -
3248 offsetof(struct ieee80211_mgmt,
3249 u.action.u.chan_switch.variable);
37799e52
JB		 3250
3251 if (ies_len < 0)
3252 break;
3253
3254 ieee802_11_parse_elems(
3255 mgmt->u.action.u.chan_switch.variable,
b2e506bf 3256 ies_len, true, &elems);
37799e52
JB		 3257
3258 if (elems.parse_error)
3259 break;
3260
1b3a2e49
JB		 3261 ieee80211_sta_process_chanswitch(sdata,
3262 rx_status->mactime,
04a161f4 3263 &elems, false);
1b3a2e49
JB		 3264 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3265 ies_len = skb->len -
3266 offsetof(struct ieee80211_mgmt,
3267 u.action.u.ext_chan_switch.variable);
3268
3269 if (ies_len < 0)
3270 break;
3271
3272 ieee802_11_parse_elems(
3273 mgmt->u.action.u.ext_chan_switch.variable,
b2e506bf 3274 ies_len, true, &elems);
1b3a2e49
JB		 3275
3276 if (elems.parse_error)
3277 break;
3278
3279 /* for the handling code pretend this was also an IE */
3280 elems.ext_chansw_ie =
3281 &mgmt->u.action.u.ext_chan_switch.data;
3282
66e67e41 3283 ieee80211_sta_process_chanswitch(sdata,
37799e52 3284 rx_status->mactime,
04a161f4 3285 &elems, false);
77fdaa12 3286 }
37799e52 3287 break;
77fdaa12 3288 }
8d61ffa5 3289 sdata_unlock(sdata);
f0706e82
JB		 3290}
3291
9c6bd790 3292static void ieee80211_sta_timer(unsigned long data)
f0706e82 3293{
60f8b39c
JB		 3294 struct ieee80211_sub_if_data *sdata =
3295 (struct ieee80211_sub_if_data *) data;
5bb644a0 3296
9b7d72c1 3297 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
f0706e82
JB		 3298}
3299
04ac3c0e 3300static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
6b684db1 3301 u8 *bssid, u8 reason, bool tx)
04ac3c0e 3302{
6ae16775 3303 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
04ac3c0e 3304
37ad3888 3305 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
6b684db1 3306 tx, frame_buf);
37ad3888 3307
6ff57cf8
JB		 3308 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3309 IEEE80211_DEAUTH_FRAME_LEN);
04ac3c0e
FF		 3310}
3311
66e67e41
JB		 3312static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
3313{
3314 struct ieee80211_local *local = sdata->local;
3315 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3316 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
1672c0e3 3317 u32 tx_flags = 0;
66e67e41 3318
8d61ffa5 3319 sdata_assert_lock(sdata);
66e67e41
JB		 3320
3321 if (WARN_ON_ONCE(!auth_data))
3322 return -EINVAL;
3323
66e67e41
JB		 3324 auth_data->tries++;
3325
3326 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
bdcbd8e0
JB		 3327 sdata_info(sdata, "authentication with %pM timed out\n",
3328 auth_data->bss->bssid);
66e67e41
JB		 3329
3330 /*
3331 * Most likely AP is not in the range so remove the
3332 * bss struct for that AP.
3333 */
3334 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3335
3336 return -ETIMEDOUT;
3337 }
3338
a1845fc7
JB		 3339 drv_mgd_prepare_tx(local, sdata);
3340
66e67e41 3341 if (auth_data->bss->proberesp_ies) {
6b8ece3a
JM		 3342 u16 trans = 1;
3343 u16 status = 0;
3344
bdcbd8e0
JB		 3345 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3346 auth_data->bss->bssid, auth_data->tries,
3347 IEEE80211_AUTH_MAX_TRIES);
66e67e41
JB		 3348
3349 auth_data->expected_transaction = 2;
6b8ece3a
JM		 3350
3351 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3352 trans = auth_data->sae_trans;
3353 status = auth_data->sae_status;
3354 auth_data->expected_transaction = trans;
3355 }
3356
6211dd12
SG		 3357 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3358 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3359 IEEE80211_TX_INTFL_MLME_CONN_TX;
3360
6b8ece3a
JM		 3361 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3362 auth_data->data, auth_data->data_len,
66e67e41 3363 auth_data->bss->bssid,
1672c0e3
JB		 3364 auth_data->bss->bssid, NULL, 0, 0,
3365 tx_flags);
66e67e41
JB		 3366 } else {
3367 const u8 *ssidie;
3368
bdcbd8e0
JB		 3369 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
3370 auth_data->bss->bssid, auth_data->tries,
3371 IEEE80211_AUTH_MAX_TRIES);
66e67e41 3372
9caf0364 3373 rcu_read_lock();
66e67e41 3374 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
9caf0364
JB		 3375 if (!ssidie) {
3376 rcu_read_unlock();
66e67e41 3377 return -EINVAL;
9caf0364 3378 }
66e67e41
JB		 3379 /*
3380 * Direct probe is sent to broadcast address as some APs
3381 * will not answer to direct packet in unassociated state.
3382 */
3383 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
6211dd12 3384 NULL, 0, (u32) -1, true, 0,
55de908a 3385 auth_data->bss->channel, false);
9caf0364 3386 rcu_read_unlock();
66e67e41
JB		 3387 }
3388
6211dd12 3389 if (tx_flags == 0) {
1672c0e3 3390 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
cb236d2d 3391 auth_data->timeout_started = true;
8d61ffa5 3392 run_again(sdata, auth_data->timeout);
89afe614 3393 } else {
cb236d2d
JB		 3394 auth_data->timeout =
3395 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3396 auth_data->timeout_started = true;
3397 run_again(sdata, auth_data->timeout);
1672c0e3 3398 }
66e67e41
JB		 3399
3400 return 0;
3401}
3402
3403static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3404{
3405 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3406 struct ieee80211_local *local = sdata->local;
3407
8d61ffa5 3408 sdata_assert_lock(sdata);
66e67e41 3409
66e67e41
JB		 3410 assoc_data->tries++;
3411 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
bdcbd8e0
JB		 3412 sdata_info(sdata, "association with %pM timed out\n",
3413 assoc_data->bss->bssid);
66e67e41
JB		 3414
3415 /*
3416 * Most likely AP is not in the range so remove the
3417 * bss struct for that AP.
3418 */
3419 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3420
3421 return -ETIMEDOUT;
3422 }
3423
bdcbd8e0
JB		 3424 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3425 assoc_data->bss->bssid, assoc_data->tries,
3426 IEEE80211_ASSOC_MAX_TRIES);
66e67e41
JB		 3427 ieee80211_send_assoc(sdata);
3428
1672c0e3
JB		 3429 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
3430 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
89afe614 3431 assoc_data->timeout_started = true;
8d61ffa5 3432 run_again(sdata, assoc_data->timeout);
89afe614 3433 } else {
cb236d2d
JB		 3434 assoc_data->timeout =
3435 round_jiffies_up(jiffies +
3436 IEEE80211_ASSOC_TIMEOUT_LONG);
3437 assoc_data->timeout_started = true;
3438 run_again(sdata, assoc_data->timeout);
1672c0e3 3439 }
66e67e41
JB		 3440
3441 return 0;
3442}
3443
1672c0e3
JB		 3444void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3445 __le16 fc, bool acked)
3446{
3447 struct ieee80211_local *local = sdata->local;
3448
3449 sdata->u.mgd.status_fc = fc;
3450 sdata->u.mgd.status_acked = acked;
3451 sdata->u.mgd.status_received = true;
3452
3453 ieee80211_queue_work(&local->hw, &sdata->work);
3454}
3455
1fa57d01 3456void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 3457{
9c6bd790 3458 struct ieee80211_local *local = sdata->local;
1fa57d01 3459 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 3460
8d61ffa5 3461 sdata_lock(sdata);
77fdaa12 3462
1672c0e3
JB		 3463 if (ifmgd->status_received) {
3464 __le16 fc = ifmgd->status_fc;
3465 bool status_acked = ifmgd->status_acked;
3466
3467 ifmgd->status_received = false;
3468 if (ifmgd->auth_data &&
3469 (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) {
3470 if (status_acked) {
3471 ifmgd->auth_data->timeout =
3472 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
8d61ffa5 3473 run_again(sdata, ifmgd->auth_data->timeout);
1672c0e3
JB		 3474 } else {
3475 ifmgd->auth_data->timeout = jiffies - 1;
3476 }
89afe614 3477 ifmgd->auth_data->timeout_started = true;
1672c0e3
JB		 3478 } else if (ifmgd->assoc_data &&
3479 (ieee80211_is_assoc_req(fc) ||
3480 ieee80211_is_reassoc_req(fc))) {
3481 if (status_acked) {
3482 ifmgd->assoc_data->timeout =
3483 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
8d61ffa5 3484 run_again(sdata, ifmgd->assoc_data->timeout);
1672c0e3
JB		 3485 } else {
3486 ifmgd->assoc_data->timeout = jiffies - 1;
3487 }
89afe614 3488 ifmgd->assoc_data->timeout_started = true;
1672c0e3
JB		 3489 }
3490 }
3491
89afe614 3492 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
66e67e41
JB		 3493 time_after(jiffies, ifmgd->auth_data->timeout)) {
3494 if (ifmgd->auth_data->done) {
3495 /*
3496 * ok ... we waited for assoc but userspace didn't,
3497 * so let's just kill the auth data
3498 */
3499 ieee80211_destroy_auth_data(sdata, false);
3500 } else if (ieee80211_probe_auth(sdata)) {
3501 u8 bssid[ETH_ALEN];
3502
3503 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3504
3505 ieee80211_destroy_auth_data(sdata, false);
3506
6ff57cf8 3507 cfg80211_auth_timeout(sdata->dev, bssid);
66e67e41 3508 }
89afe614 3509 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
8d61ffa5 3510 run_again(sdata, ifmgd->auth_data->timeout);
66e67e41 3511
89afe614 3512 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
66e67e41 3513 time_after(jiffies, ifmgd->assoc_data->timeout)) {
989c6505 3514 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
66e67e41 3515 ieee80211_do_assoc(sdata)) {
959867fa 3516 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
66e67e41
JB		 3517
3518 ieee80211_destroy_assoc_data(sdata, false);
959867fa 3519 cfg80211_assoc_timeout(sdata->dev, bss);
66e67e41 3520 }
89afe614 3521 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
8d61ffa5 3522 run_again(sdata, ifmgd->assoc_data->timeout);
66e67e41 3523
392b9ffb 3524 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
b291ba11 3525 ifmgd->associated) {
a43abf29 3526 u8 bssid[ETH_ALEN];
72a8a3ed 3527 int max_tries;
a43abf29 3528
0c1ad2ca 3529 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 3530
72a8a3ed 3531 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
180205bd 3532 max_tries = max_nullfunc_tries;
72a8a3ed 3533 else
180205bd 3534 max_tries = max_probe_tries;
72a8a3ed 3535
4e5ff376
FF		 3536 /* ACK received for nullfunc probing frame */
3537 if (!ifmgd->probe_send_count)
3538 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 3539 else if (ifmgd->nullfunc_failed) {
3540 if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3541 mlme_dbg(sdata,
3542 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3543 bssid, ifmgd->probe_send_count,
3544 max_tries);
04ac3c0e
FF		 3545 ieee80211_mgd_probe_ap_send(sdata);
3546 } else {
bdcbd8e0
JB		 3547 mlme_dbg(sdata,
3548 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3549 bssid);
95acac61 3550 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1
JB		 3551 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3552 false);
04ac3c0e
FF		 3553 }
3554 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
8d61ffa5 3555 run_again(sdata, ifmgd->probe_timeout);
04ac3c0e 3556 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
bdcbd8e0
JB		 3557 mlme_dbg(sdata,
3558 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3559 bssid, probe_wait_ms);
95acac61 3560 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 3561 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
04ac3c0e 3562 } else if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3563 mlme_dbg(sdata,
3564 "No probe response from AP %pM after %dms, try %d/%i\n",
3565 bssid, probe_wait_ms,
3566 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 3567 ieee80211_mgd_probe_ap_send(sdata);
3568 } else {
b291ba11
JB		 3569 /*
3570 * We actually lost the connection ... or did we?
3571 * Let's make sure!
3572 */
b38afa87
BG		 3573 wiphy_debug(local->hw.wiphy,
3574 "%s: No probe response from AP %pM"
3575 " after %dms, disconnecting.\n",
3576 sdata->name,
180205bd 3577 bssid, probe_wait_ms);
04ac3c0e 3578
95acac61 3579 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 3580 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
b291ba11
JB		 3581 }
3582 }
3583
8d61ffa5 3584 sdata_unlock(sdata);
f0706e82
JB		 3585}
3586
b291ba11
JB		 3587static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3588{
3589 struct ieee80211_sub_if_data *sdata =
3590 (struct ieee80211_sub_if_data *) data;
3591 struct ieee80211_local *local = sdata->local;
3592
3593 if (local->quiescing)
3594 return;
3595
e5593f56
MK		 3596 if (sdata->vif.csa_active)
3597 return;
3598
682bd38b 3599 sdata->u.mgd.connection_loss = false;
1e4dcd01
JO		 3600 ieee80211_queue_work(&sdata->local->hw,
3601 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 3602}
3603
3604static void ieee80211_sta_conn_mon_timer(unsigned long data)
3605{
3606 struct ieee80211_sub_if_data *sdata =
3607 (struct ieee80211_sub_if_data *) data;
3608 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3609 struct ieee80211_local *local = sdata->local;
3610
3611 if (local->quiescing)
3612 return;
3613
e5593f56
MK		 3614 if (sdata->vif.csa_active)
3615 return;
3616
42935eca 3617 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 3618}
3619
3620static void ieee80211_sta_monitor_work(struct work_struct *work)
3621{
3622 struct ieee80211_sub_if_data *sdata =
3623 container_of(work, struct ieee80211_sub_if_data,
3624 u.mgd.monitor_work);
3625
3626 ieee80211_mgd_probe_ap(sdata, false);
3627}
3628
9c6bd790
JB		 3629static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3630{
494f1fe5
EP		 3631 u32 flags;
3632
ad935687 3633 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
925e64c3 3634 __ieee80211_stop_poll(sdata);
ad935687 3635
b291ba11 3636 /* let's probe the connection once */
494f1fe5
EP		 3637 flags = sdata->local->hw.flags;
3638 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3639 ieee80211_queue_work(&sdata->local->hw,
3640 &sdata->u.mgd.monitor_work);
b291ba11 3641 /* and do all the other regular work too */
64592c8f 3642 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 3643 }
9c6bd790 3644}
f0706e82 3645
b8360ab8 3646#ifdef CONFIG_PM
1a1cb744
JB		 3647void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
3648{
3649 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3650 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3651
3652 sdata_lock(sdata);
3653
c52666ae
EG		 3654 if (ifmgd->auth_data || ifmgd->assoc_data) {
3655 const u8 *bssid = ifmgd->auth_data ?
3656 ifmgd->auth_data->bss->bssid :
3657 ifmgd->assoc_data->bss->bssid;
3658
1a1cb744 3659 /*
c52666ae
EG		 3660 * If we are trying to authenticate / associate while suspending,
3661 * cfg80211 won't know and won't actually abort those attempts,
3662 * thus we need to do that ourselves.
1a1cb744 3663 */
c52666ae 3664 ieee80211_send_deauth_disassoc(sdata, bssid,
1a1cb744
JB		 3665 IEEE80211_STYPE_DEAUTH,
3666 WLAN_REASON_DEAUTH_LEAVING,
3667 false, frame_buf);
c52666ae
EG		 3668 if (ifmgd->assoc_data)
3669 ieee80211_destroy_assoc_data(sdata, false);
3670 if (ifmgd->auth_data)
3671 ieee80211_destroy_auth_data(sdata, false);
1a1cb744
JB		 3672 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3673 IEEE80211_DEAUTH_FRAME_LEN);
3674 }
3675
3676 sdata_unlock(sdata);
3677}
3678
b8360ab8
JB		 3679void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
3680{
3681 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3682
8d61ffa5 3683 sdata_lock(sdata);
b8360ab8 3684 if (!ifmgd->associated) {
8d61ffa5 3685 sdata_unlock(sdata);
b8360ab8
JB		 3686 return;
3687 }
3688
3689 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
3690 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
3691 mlme_dbg(sdata, "driver requested disconnect after resume\n");
3692 ieee80211_sta_connection_lost(sdata,
3693 ifmgd->associated->bssid,
3694 WLAN_REASON_UNSPECIFIED,
3695 true);
8d61ffa5 3696 sdata_unlock(sdata);
b8360ab8
JB		 3697 return;
3698 }
8d61ffa5 3699 sdata_unlock(sdata);
b8360ab8
JB		 3700}
3701#endif
3702
9c6bd790
JB		 3703/* interface setup */
3704void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 3705{
46900298 3706 struct ieee80211_if_managed *ifmgd;
988c0f72 3707
46900298 3708 ifmgd = &sdata->u.mgd;
b291ba11 3709 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 3710 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 3711 INIT_WORK(&ifmgd->beacon_connection_loss_work,
3712 ieee80211_beacon_connection_loss_work);
882a7c69
JB		 3713 INIT_WORK(&ifmgd->csa_connection_drop_work,
3714 ieee80211_csa_connection_drop_work);
687da132 3715 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
46900298 3716 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 3717 (unsigned long) sdata);
b291ba11
JB		 3718 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
3719 (unsigned long) sdata);
3720 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
3721 (unsigned long) sdata);
46900298 3722 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 3723 (unsigned long) sdata);
9c6bd790 3724
ab1faead 3725 ifmgd->flags = 0;
1478acb3 3726 ifmgd->powersave = sdata->wdev.ps;
219c3867
AB		 3727 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
3728 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
67baf663 3729 ifmgd->p2p_noa_index = -1;
bbbdff9e 3730
0f78231b
JB		 3731 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
3732 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
3733 else
3734 ifmgd->req_smps = IEEE80211_SMPS_OFF;
f0706e82
JB		 3735}
3736
77fdaa12
JB		 3737/* scan finished notification */
3738void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 3739{
31ee67a1 3740 struct ieee80211_sub_if_data *sdata;
60f8b39c 3741
77fdaa12
JB		 3742 /* Restart STA timers */
3743 rcu_read_lock();
370bd005
BG		 3744 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3745 if (ieee80211_sdata_running(sdata))
3746 ieee80211_restart_sta_timer(sdata);
3747 }
77fdaa12
JB		 3748 rcu_read_unlock();
3749}
60f8b39c 3750
77fdaa12
JB		 3751int ieee80211_max_network_latency(struct notifier_block *nb,
3752 unsigned long data, void *dummy)
3753{
3754 s32 latency_usec = (s32) data;
3755 struct ieee80211_local *local =
3756 container_of(nb, struct ieee80211_local,
3757 network_latency_notifier);
1fa6f4af 3758
77fdaa12
JB		 3759 mutex_lock(&local->iflist_mtx);
3760 ieee80211_recalc_ps(local, latency_usec);
3761 mutex_unlock(&local->iflist_mtx);
dfe67012 3762
8bd811aa 3763 return NOTIFY_OK;
9c6bd790
JB		 3764}
3765
f2d9d270
JB		 3766static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
3767 struct cfg80211_bss *cbss)
3768{
3769 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3770 const u8 *ht_cap_ie, *vht_cap_ie;
3771 const struct ieee80211_ht_cap *ht_cap;
3772 const struct ieee80211_vht_cap *vht_cap;
3773 u8 chains = 1;
3774
3775 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
3776 return chains;
3777
9caf0364 3778 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
f2d9d270
JB		 3779 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
3780 ht_cap = (void *)(ht_cap_ie + 2);
3781 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
3782 /*
3783 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
3784 * "Tx Unequal Modulation Supported" fields.
3785 */
3786 }
3787
3788 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
3789 return chains;
3790
9caf0364 3791 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
f2d9d270
JB		 3792 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
3793 u8 nss;
3794 u16 tx_mcs_map;
3795
3796 vht_cap = (void *)(vht_cap_ie + 2);
3797 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
3798 for (nss = 8; nss > 0; nss--) {
3799 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
3800 IEEE80211_VHT_MCS_NOT_SUPPORTED)
3801 break;
3802 }
3803 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
3804 chains = max(chains, nss);
3805 }
3806
3807 return chains;
3808}
3809
b17166a7
JB		 3810static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
3811 struct cfg80211_bss *cbss)
a1cf775d
JB		 3812{
3813 struct ieee80211_local *local = sdata->local;
3814 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
24398e39 3815 const struct ieee80211_ht_operation *ht_oper = NULL;
f2d9d270 3816 const struct ieee80211_vht_operation *vht_oper = NULL;
24398e39 3817 struct ieee80211_supported_band *sband;
4bf88530 3818 struct cfg80211_chan_def chandef;
f2d9d270 3819 int ret;
a1cf775d 3820
24398e39
JB		 3821 sband = local->hw.wiphy->bands[cbss->channel->band];
3822
f2d9d270
JB		 3823 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
3824 IEEE80211_STA_DISABLE_80P80MHZ |
3825 IEEE80211_STA_DISABLE_160MHZ);
3826
9caf0364
JB		 3827 rcu_read_lock();
3828
f2d9d270
JB		 3829 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3830 sband->ht_cap.ht_supported) {
08e6effa 3831 const u8 *ht_oper_ie, *ht_cap;
24398e39 3832
9caf0364 3833 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
24398e39
JB		 3834 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3835 ht_oper = (void *)(ht_oper_ie + 2);
08e6effa
JB		 3836
3837 ht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
3838 if (!ht_cap || ht_cap[1] < sizeof(struct ieee80211_ht_cap)) {
3839 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3840 ht_oper = NULL;
3841 }
24398e39
JB		 3842 }
3843
f2d9d270
JB		 3844 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3845 sband->vht_cap.vht_supported) {
08e6effa 3846 const u8 *vht_oper_ie, *vht_cap;
f2d9d270 3847
9caf0364
JB		 3848 vht_oper_ie = ieee80211_bss_get_ie(cbss,
3849 WLAN_EID_VHT_OPERATION);
f2d9d270
JB		 3850 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
3851 vht_oper = (void *)(vht_oper_ie + 2);
3852 if (vht_oper && !ht_oper) {
3853 vht_oper = NULL;
bdcbd8e0 3854 sdata_info(sdata,
f2d9d270 3855 "AP advertised VHT without HT, disabling both\n");
cb145022
JB		 3856 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3857 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
24398e39 3858 }
08e6effa
JB		 3859
3860 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
3861 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
3862 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3863 vht_oper = NULL;
3864 }
24398e39
JB		 3865 }
3866
f2d9d270
JB		 3867 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
3868 cbss->channel,
3869 ht_oper, vht_oper,
5cdaed1e 3870 &chandef, false);
04ecd257 3871
f2d9d270
JB		 3872 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
3873 local->rx_chains);
24398e39 3874
9caf0364
JB		 3875 rcu_read_unlock();
3876
04ecd257
JB		 3877 /* will change later if needed */
3878 sdata->smps_mode = IEEE80211_SMPS_OFF;
3879
34a3740d 3880 mutex_lock(&local->mtx);
f2d9d270
JB		 3881 /*
3882 * If this fails (possibly due to channel context sharing
3883 * on incompatible channels, e.g. 80+80 and 160 sharing the
3884 * same control channel) try to use a smaller bandwidth.
3885 */
3886 ret = ieee80211_vif_use_channel(sdata, &chandef,
3887 IEEE80211_CHANCTX_SHARED);
0418a445
SW		 3888
3889 /* don't downgrade for 5 and 10 MHz channels, though. */
3890 if (chandef.width == NL80211_CHAN_WIDTH_5 ||
3891 chandef.width == NL80211_CHAN_WIDTH_10)
34a3740d 3892 goto out;
0418a445 3893
d601cd8d 3894 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
e6b7cde4 3895 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
d601cd8d
JB		 3896 ret = ieee80211_vif_use_channel(sdata, &chandef,
3897 IEEE80211_CHANCTX_SHARED);
3898 }
34a3740d
JB		 3899 out:
3900 mutex_unlock(&local->mtx);
f2d9d270 3901 return ret;
b17166a7
JB		 3902}
3903
3904static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
3905 struct cfg80211_bss *cbss, bool assoc)
3906{
3907 struct ieee80211_local *local = sdata->local;
3908 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3909 struct ieee80211_bss *bss = (void *)cbss->priv;
3910 struct sta_info *new_sta = NULL;
3911 bool have_sta = false;
3912 int err;
3913
3914 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3915 return -EINVAL;
3916
3917 if (assoc) {
3918 rcu_read_lock();
3919 have_sta = sta_info_get(sdata, cbss->bssid);
3920 rcu_read_unlock();
3921 }
3922
3923 if (!have_sta) {
3924 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
3925 if (!new_sta)
3926 return -ENOMEM;
3927 }
13e0c8e3 3928 if (new_sta) {
5d6a1b06
JB		 3929 u32 rates = 0, basic_rates = 0;
3930 bool have_higher_than_11mbit;
3931 int min_rate = INT_MAX, min_rate_index = -1;
2103dec1 3932 struct ieee80211_chanctx_conf *chanctx_conf;
b17166a7 3933 struct ieee80211_supported_band *sband;
8cef2c9d 3934 const struct cfg80211_bss_ies *ies;
2103dec1
SW		 3935 int shift;
3936 u32 rate_flags;
b17166a7
JB		 3937
3938 sband = local->hw.wiphy->bands[cbss->channel->band];
3939
3940 err = ieee80211_prep_channel(sdata, cbss);
3941 if (err) {
3942 sta_info_free(local, new_sta);
2103dec1 3943 return -EINVAL;
b17166a7 3944 }
2103dec1
SW		 3945 shift = ieee80211_vif_get_shift(&sdata->vif);
3946
3947 rcu_read_lock();
3948 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3949 if (WARN_ON(!chanctx_conf)) {
3950 rcu_read_unlock();
c368ddaa 3951 sta_info_free(local, new_sta);
2103dec1
SW		 3952 return -EINVAL;
3953 }
3954 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
3955 rcu_read_unlock();
5d6a1b06 3956
5d6a1b06
JB		 3957 ieee80211_get_rates(sband, bss->supp_rates,
3958 bss->supp_rates_len,
3959 &rates, &basic_rates,
3960 &have_higher_than_11mbit,
2103dec1
SW		 3961 &min_rate, &min_rate_index,
3962 shift, rate_flags);
5d6a1b06
JB		 3963
3964 /*
3965 * This used to be a workaround for basic rates missing
3966 * in the association response frame. Now that we no
3967 * longer use the basic rates from there, it probably
3968 * doesn't happen any more, but keep the workaround so
3969 * in case some *other* APs are buggy in different ways
3970 * we can connect -- with a warning.
3971 */
3972 if (!basic_rates && min_rate_index >= 0) {
bdcbd8e0
JB		 3973 sdata_info(sdata,
3974 "No basic rates, using min rate instead\n");
5d6a1b06
JB		 3975 basic_rates = BIT(min_rate_index);
3976 }
3977
13e0c8e3 3978 new_sta->sta.supp_rates[cbss->channel->band] = rates;
5d6a1b06
JB		 3979 sdata->vif.bss_conf.basic_rates = basic_rates;
3980
3981 /* cf. IEEE 802.11 9.2.12 */
55de908a 3982 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
5d6a1b06
JB		 3983 have_higher_than_11mbit)
3984 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3985 else
3986 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
3987
3988 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
3989
8c358bcd
JB		 3990 /* set timing information */
3991 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
8cef2c9d 3992 rcu_read_lock();
ef429dad
JB		 3993 ies = rcu_dereference(cbss->beacon_ies);
3994 if (ies) {
3995 const u8 *tim_ie;
3996
3997 sdata->vif.bss_conf.sync_tsf = ies->tsf;
3998 sdata->vif.bss_conf.sync_device_ts =
3999 bss->device_ts_beacon;
4000 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4001 ies->data, ies->len);
4002 if (tim_ie && tim_ie[1] >= 2)
4003 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
4004 else
4005 sdata->vif.bss_conf.sync_dtim_count = 0;
4006 } else if (!(local->hw.flags &
4007 IEEE80211_HW_TIMING_BEACON_ONLY)) {
4008 ies = rcu_dereference(cbss->proberesp_ies);
4009 /* must be non-NULL since beacon IEs were NULL */
4010 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4011 sdata->vif.bss_conf.sync_device_ts =
4012 bss->device_ts_presp;
4013 sdata->vif.bss_conf.sync_dtim_count = 0;
4014 } else {
4015 sdata->vif.bss_conf.sync_tsf = 0;
4016 sdata->vif.bss_conf.sync_device_ts = 0;
4017 sdata->vif.bss_conf.sync_dtim_count = 0;
4018 }
8cef2c9d 4019 rcu_read_unlock();
8c358bcd
JB		 4020
4021 /* tell driver about BSSID, basic rates and timing */
5d6a1b06 4022 ieee80211_bss_info_change_notify(sdata,
8c358bcd
JB		 4023 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4024 BSS_CHANGED_BEACON_INT);
a1cf775d
JB		 4025
4026 if (assoc)
13e0c8e3 4027 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
a1cf775d 4028
13e0c8e3
JB		 4029 err = sta_info_insert(new_sta);
4030 new_sta = NULL;
a1cf775d 4031 if (err) {
bdcbd8e0
JB		 4032 sdata_info(sdata,
4033 "failed to insert STA entry for the AP (error %d)\n",
4034 err);
a1cf775d
JB		 4035 return err;
4036 }
4037 } else
b203ca39 4038 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
a1cf775d
JB		 4039
4040 return 0;
4041}
4042
77fdaa12
JB		 4043/* config hooks */
4044int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4045 struct cfg80211_auth_request *req)
9c6bd790 4046{
66e67e41
JB		 4047 struct ieee80211_local *local = sdata->local;
4048 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4049 struct ieee80211_mgd_auth_data *auth_data;
77fdaa12 4050 u16 auth_alg;
66e67e41
JB		 4051 int err;
4052
4053 /* prepare auth data structure */
9c6bd790 4054
77fdaa12
JB		 4055 switch (req->auth_type) {
4056 case NL80211_AUTHTYPE_OPEN_SYSTEM:
4057 auth_alg = WLAN_AUTH_OPEN;
4058 break;
4059 case NL80211_AUTHTYPE_SHARED_KEY:
66e67e41 4060 if (IS_ERR(local->wep_tx_tfm))
9dca9c49 4061 return -EOPNOTSUPP;
77fdaa12
JB		 4062 auth_alg = WLAN_AUTH_SHARED_KEY;
4063 break;
4064 case NL80211_AUTHTYPE_FT:
4065 auth_alg = WLAN_AUTH_FT;
4066 break;
4067 case NL80211_AUTHTYPE_NETWORK_EAP:
4068 auth_alg = WLAN_AUTH_LEAP;
4069 break;
6b8ece3a
JM		 4070 case NL80211_AUTHTYPE_SAE:
4071 auth_alg = WLAN_AUTH_SAE;
4072 break;
77fdaa12
JB		 4073 default:
4074 return -EOPNOTSUPP;
60f8b39c 4075 }
77fdaa12 4076
6b8ece3a
JM		 4077 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
4078 req->ie_len, GFP_KERNEL);
66e67e41 4079 if (!auth_data)
9c6bd790 4080 return -ENOMEM;
77fdaa12 4081
66e67e41 4082 auth_data->bss = req->bss;
77fdaa12 4083
6b8ece3a
JM		 4084 if (req->sae_data_len >= 4) {
4085 __le16 *pos = (__le16 *) req->sae_data;
4086 auth_data->sae_trans = le16_to_cpu(pos[0]);
4087 auth_data->sae_status = le16_to_cpu(pos[1]);
4088 memcpy(auth_data->data, req->sae_data + 4,
4089 req->sae_data_len - 4);
4090 auth_data->data_len += req->sae_data_len - 4;
4091 }
4092
77fdaa12 4093 if (req->ie && req->ie_len) {
6b8ece3a
JM		 4094 memcpy(&auth_data->data[auth_data->data_len],
4095 req->ie, req->ie_len);
4096 auth_data->data_len += req->ie_len;
9c6bd790 4097 }
77fdaa12 4098
fffd0934 4099 if (req->key && req->key_len) {
66e67e41
JB		 4100 auth_data->key_len = req->key_len;
4101 auth_data->key_idx = req->key_idx;
4102 memcpy(auth_data->key, req->key, req->key_len);
fffd0934
JB		 4103 }
4104
66e67e41 4105 auth_data->algorithm = auth_alg;
60f8b39c 4106
66e67e41 4107 /* try to authenticate/probe */
2a33bee2 4108
66e67e41
JB		 4109 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4110 ifmgd->assoc_data) {
4111 err = -EBUSY;
4112 goto err_free;
2a33bee2
GE		 4113 }
4114
66e67e41
JB		 4115 if (ifmgd->auth_data)
4116 ieee80211_destroy_auth_data(sdata, false);
2a33bee2 4117
66e67e41
JB		 4118 /* prep auth_data so we don't go into idle on disassoc */
4119 ifmgd->auth_data = auth_data;
af6b6374 4120
7b119dc0
JB		 4121 if (ifmgd->associated) {
4122 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4123
4124 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4125 WLAN_REASON_UNSPECIFIED,
4126 false, frame_buf);
4127
6ff57cf8
JB		 4128 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4129 sizeof(frame_buf));
7b119dc0 4130 }
af6b6374 4131
bdcbd8e0 4132 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
e5b900d2 4133
a1cf775d
JB		 4134 err = ieee80211_prep_connection(sdata, req->bss, false);
4135 if (err)
66e67e41 4136 goto err_clear;
af6b6374 4137
66e67e41
JB		 4138 err = ieee80211_probe_auth(sdata);
4139 if (err) {
66e67e41
JB		 4140 sta_info_destroy_addr(sdata, req->bss->bssid);
4141 goto err_clear;
4142 }
4143
4144 /* hold our own reference */
5b112d3d 4145 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
8d61ffa5 4146 return 0;
66e67e41
JB		 4147
4148 err_clear:
3d2abdfd
EP		 4149 memset(ifmgd->bssid, 0, ETH_ALEN);
4150 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 4151 ifmgd->auth_data = NULL;
4152 err_free:
4153 kfree(auth_data);
66e67e41 4154 return err;
af6b6374
JB		 4155}
4156
095d81ce
JB		 4157static bool ieee80211_usable_wmm_params(struct ieee80211_sub_if_data *sdata,
4158 const u8 *wmm_param, int len)
4159{
4160 const u8 *pos;
4161 size_t left;
4162
4163 if (len < 8)
4164 return false;
4165
4166 if (wmm_param[5] != 1 /* version */)
4167 return false;
4168
4169 pos = wmm_param + 8;
4170 left = len - 8;
4171
4172 for (; left >= 4; left -= 4, pos += 4) {
4173 u8 aifsn = pos[0] & 0x0f;
4174 u8 ecwmin = pos[1] & 0x0f;
4175 u8 ecwmax = (pos[1] & 0xf0) >> 4;
4176 int aci = (pos[0] >> 5) & 0x03;
4177
4178 if (aifsn < 2) {
4179 sdata_info(sdata,
4180 "AP has invalid WMM params (AIFSN=%d for ACI %d), disabling WMM\n",
4181 aifsn, aci);
4182 return false;
4183 }
4184 if (ecwmin > ecwmax) {
4185 sdata_info(sdata,
4186 "AP has invalid WMM params (ECWmin/max=%d/%d for ACI %d), disabling WMM\n",
4187 ecwmin, ecwmax, aci);
4188 return false;
4189 }
4190 }
4191
4192 return true;
4193}
4194
77fdaa12
JB		 4195int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4196 struct cfg80211_assoc_request *req)
f0706e82 4197{
66e67e41 4198 struct ieee80211_local *local = sdata->local;
77fdaa12 4199 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 4200 struct ieee80211_bss *bss = (void *)req->bss->priv;
66e67e41 4201 struct ieee80211_mgd_assoc_data *assoc_data;
c65dd147 4202 const struct cfg80211_bss_ies *beacon_ies;
4e74bfdb 4203 struct ieee80211_supported_band *sband;
b08fbbd8 4204 const u8 *ssidie, *ht_ie, *vht_ie;
2a33bee2 4205 int i, err;
f0706e82 4206
66e67e41
JB		 4207 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4208 if (!assoc_data)
4209 return -ENOMEM;
4210
9caf0364
JB		 4211 rcu_read_lock();
4212 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4213 if (!ssidie) {
4214 rcu_read_unlock();
4215 kfree(assoc_data);
4216 return -EINVAL;
4217 }
4218 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4219 assoc_data->ssid_len = ssidie[1];
4220 rcu_read_unlock();
4221
7b119dc0
JB		 4222 if (ifmgd->associated) {
4223 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4224
4225 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4226 WLAN_REASON_UNSPECIFIED,
4227 false, frame_buf);
4228
6ff57cf8
JB		 4229 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4230 sizeof(frame_buf));
7b119dc0 4231 }
66e67e41
JB		 4232
4233 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4234 err = -EBUSY;
4235 goto err_free;
af6b6374 4236 }
77fdaa12 4237
66e67e41
JB		 4238 if (ifmgd->assoc_data) {
4239 err = -EBUSY;
4240 goto err_free;
4241 }
77fdaa12 4242
66e67e41
JB		 4243 if (ifmgd->auth_data) {
4244 bool match;
4245
4246 /* keep sta info, bssid if matching */
b203ca39 4247 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
66e67e41 4248 ieee80211_destroy_auth_data(sdata, match);
2a33bee2
GE		 4249 }
4250
66e67e41 4251 /* prepare assoc data */
095d81ce 4252
d8ec4433
JO		 4253 ifmgd->beacon_crc_valid = false;
4254
095d81ce
JB		 4255 assoc_data->wmm = bss->wmm_used &&
4256 (local->hw.queues >= IEEE80211_NUM_ACS);
4257 if (assoc_data->wmm) {
4258 /* try to check validity of WMM params IE */
4259 const struct cfg80211_bss_ies *ies;
4260 const u8 *wp, *start, *end;
4261
4262 rcu_read_lock();
4263 ies = rcu_dereference(req->bss->ies);
4264 start = ies->data;
4265 end = start + ies->len;
4266
4267 while (true) {
4268 wp = cfg80211_find_vendor_ie(
4269 WLAN_OUI_MICROSOFT,
4270 WLAN_OUI_TYPE_MICROSOFT_WMM,
4271 start, end - start);
4272 if (!wp)
4273 break;
4274 start = wp + wp[1] + 2;
4275 /* if this IE is too short, try the next */
4276 if (wp[1] <= 4)
4277 continue;
4278 /* if this IE is WMM params, we found what we wanted */
4279 if (wp[6] == 1)
4280 break;
4281 }
4282
4283 if (!wp || !ieee80211_usable_wmm_params(sdata, wp + 2,
4284 wp[1] - 2)) {
4285 assoc_data->wmm = false;
4286 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
4287 }
4288 rcu_read_unlock();
4289 }
4290
de5036aa
JB		 4291 /*
4292 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4293 * We still associate in non-HT mode (11a/b/g) if any one of these
4294 * ciphers is configured as pairwise.
4295 * We can set this to true for non-11n hardware, that'll be checked
4296 * separately along with the peer capabilities.
4297 */
1c4cb928 4298 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
77fdaa12
JB		 4299 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4300 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
1c4cb928 4301 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
a8243b72 4302 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
d545daba 4303 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
1c4cb928 4304 netdev_info(sdata->dev,
d545daba 4305 "disabling HT/VHT due to WEP/TKIP use\n");
1c4cb928
JB		 4306 }
4307 }
77fdaa12 4308
d545daba 4309 if (req->flags & ASSOC_REQ_DISABLE_HT) {
a8243b72 4310 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
d545daba
MP		 4311 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4312 }
ef96a842 4313
dd5ecfea
JB		 4314 if (req->flags & ASSOC_REQ_DISABLE_VHT)
4315 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4316
4e74bfdb
JB		 4317 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4318 sband = local->hw.wiphy->bands[req->bss->channel->band];
4319 if (!sband->ht_cap.ht_supported ||
095d81ce
JB		 4320 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4321 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
a8243b72 4322 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
095d81ce
JB		 4323 if (!bss->wmm_used &&
4324 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
1b49de26
JB		 4325 netdev_info(sdata->dev,
4326 "disabling HT as WMM/QoS is not supported by the AP\n");
1c4cb928 4327 }
4e74bfdb 4328
d545daba
MP		 4329 /* disable VHT if we don't support it or the AP doesn't use WMM */
4330 if (!sband->vht_cap.vht_supported ||
095d81ce
JB		 4331 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4332 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
d545daba 4333 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
095d81ce
JB		 4334 if (!bss->wmm_used &&
4335 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
1b49de26
JB		 4336 netdev_info(sdata->dev,
4337 "disabling VHT as WMM/QoS is not supported by the AP\n");
d545daba
MP		 4338 }
4339
ef96a842
BG		 4340 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4341 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4342 sizeof(ifmgd->ht_capa_mask));
4343
dd5ecfea
JB		 4344 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4345 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4346 sizeof(ifmgd->vht_capa_mask));
4347
77fdaa12 4348 if (req->ie && req->ie_len) {
66e67e41
JB		 4349 memcpy(assoc_data->ie, req->ie, req->ie_len);
4350 assoc_data->ie_len = req->ie_len;
4351 }
f679f65d 4352
66e67e41 4353 assoc_data->bss = req->bss;
f679f65d 4354
af6b6374
JB		 4355 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4356 if (ifmgd->powersave)
04ecd257 4357 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
af6b6374 4358 else
04ecd257 4359 sdata->smps_mode = IEEE80211_SMPS_OFF;
af6b6374 4360 } else
04ecd257 4361 sdata->smps_mode = ifmgd->req_smps;
af6b6374 4362
66e67e41 4363 assoc_data->capability = req->bss->capability;
66e67e41
JB		 4364 assoc_data->supp_rates = bss->supp_rates;
4365 assoc_data->supp_rates_len = bss->supp_rates_len;
9dde6423 4366
9caf0364 4367 rcu_read_lock();
9dde6423
JB		 4368 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4369 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4370 assoc_data->ap_ht_param =
4371 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4372 else
a8243b72 4373 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
b08fbbd8
JB		 4374 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4375 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4376 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4377 sizeof(struct ieee80211_vht_cap));
4378 else
4379 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
9caf0364 4380 rcu_read_unlock();
63f170e0 4381
ab13315a 4382 if (bss->wmm_used && bss->uapsd_supported &&
24aa11ab
AB		 4383 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD) &&
4384 sdata->wmm_acm != 0xff) {
76f0303d 4385 assoc_data->uapsd = true;
ab13315a
KV		 4386 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4387 } else {
76f0303d 4388 assoc_data->uapsd = false;
ab13315a
KV		 4389 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4390 }
4391
77fdaa12 4392 if (req->prev_bssid)
66e67e41 4393 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12
JB		 4394
4395 if (req->use_mfp) {
4396 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4397 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4398 } else {
4399 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4400 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4401 }
4402
4403 if (req->crypto.control_port)
4404 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4405 else
4406 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4407
a621fa4d
JB		 4408 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4409 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
2475b1cc
MS		 4410 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
4411 sdata->vif.type);
a621fa4d 4412
66e67e41
JB		 4413 /* kick off associate process */
4414
4415 ifmgd->assoc_data = assoc_data;
826262c3 4416 ifmgd->dtim_period = 0;
989c6505 4417 ifmgd->have_beacon = false;
66e67e41 4418
a1cf775d
JB		 4419 err = ieee80211_prep_connection(sdata, req->bss, true);
4420 if (err)
4421 goto err_clear;
66e67e41 4422
c65dd147
EG		 4423 rcu_read_lock();
4424 beacon_ies = rcu_dereference(req->bss->beacon_ies);
826262c3 4425
c65dd147
EG		 4426 if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC &&
4427 !beacon_ies) {
4428 /*
4429 * Wait up to one beacon interval ...
4430 * should this be more if we miss one?
4431 */
4432 sdata_info(sdata, "waiting for beacon from %pM\n",
4433 ifmgd->bssid);
4434 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
89afe614 4435 assoc_data->timeout_started = true;
c65dd147
EG		 4436 assoc_data->need_beacon = true;
4437 } else if (beacon_ies) {
4438 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4439 beacon_ies->data,
4440 beacon_ies->len);
ef429dad
JB		 4441 u8 dtim_count = 0;
4442
c65dd147
EG		 4443 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4444 const struct ieee80211_tim_ie *tim;
4445 tim = (void *)(tim_ie + 2);
4446 ifmgd->dtim_period = tim->dtim_period;
ef429dad 4447 dtim_count = tim->dtim_count;
826262c3 4448 }
989c6505 4449 ifmgd->have_beacon = true;
66e67e41 4450 assoc_data->timeout = jiffies;
89afe614 4451 assoc_data->timeout_started = true;
ef429dad
JB		 4452
4453 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
4454 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4455 sdata->vif.bss_conf.sync_device_ts =
4456 bss->device_ts_beacon;
4457 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4458 }
c65dd147
EG		 4459 } else {
4460 assoc_data->timeout = jiffies;
89afe614 4461 assoc_data->timeout_started = true;
66e67e41 4462 }
c65dd147
EG		 4463 rcu_read_unlock();
4464
8d61ffa5 4465 run_again(sdata, assoc_data->timeout);
66e67e41 4466
fcff4f10
PS		 4467 if (bss->corrupt_data) {
4468 char *corrupt_type = "data";
4469 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4470 if (bss->corrupt_data &
4471 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4472 corrupt_type = "beacon and probe response";
4473 else
4474 corrupt_type = "beacon";
4475 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4476 corrupt_type = "probe response";
bdcbd8e0
JB		 4477 sdata_info(sdata, "associating with AP with corrupt %s\n",
4478 corrupt_type);
fcff4f10
PS		 4479 }
4480
8d61ffa5 4481 return 0;
66e67e41 4482 err_clear:
3d2abdfd
EP		 4483 memset(ifmgd->bssid, 0, ETH_ALEN);
4484 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 4485 ifmgd->assoc_data = NULL;
4486 err_free:
4487 kfree(assoc_data);
66e67e41 4488 return err;
f0706e82
JB		 4489}
4490
77fdaa12 4491int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
63c9c5e7 4492 struct cfg80211_deauth_request *req)
f0706e82 4493{
46900298 4494 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 4495 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
6863255b 4496 bool tx = !req->local_state_change;
f0706e82 4497
c9c3a060
JB		 4498 if (ifmgd->auth_data &&
4499 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
4500 sdata_info(sdata,
4501 "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
4502 req->bssid, req->reason_code,
4503 ieee80211_get_reason_code_string(req->reason_code));
0ff71613 4504
8c7d857c 4505 drv_mgd_prepare_tx(sdata->local, sdata);
37ad3888
JB		 4506 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4507 IEEE80211_STYPE_DEAUTH,
6863255b 4508 req->reason_code, tx,
37ad3888 4509 frame_buf);
86552017 4510 ieee80211_destroy_auth_data(sdata, false);
c9c3a060
JB		 4511 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4512 IEEE80211_DEAUTH_FRAME_LEN);
86552017 4513
c9c3a060 4514 return 0;
8c7d857c
EG		 4515 }
4516
86552017
JB		 4517 if (ifmgd->associated &&
4518 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
c9c3a060
JB		 4519 sdata_info(sdata,
4520 "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
4521 req->bssid, req->reason_code,
4522 ieee80211_get_reason_code_string(req->reason_code));
4523
86552017
JB		 4524 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4525 req->reason_code, tx, frame_buf);
6ff57cf8
JB		 4526 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4527 IEEE80211_DEAUTH_FRAME_LEN);
c9c3a060
JB		 4528 return 0;
4529 }
86552017 4530
c9c3a060 4531 return -ENOTCONN;
f0706e82 4532}
84363e6e 4533
77fdaa12 4534int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 4535 struct cfg80211_disassoc_request *req)
9c6bd790 4536{
77fdaa12 4537 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 4538 u8 bssid[ETH_ALEN];
6ae16775 4539 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
9c6bd790 4540
8d8b261a
JB		 4541 /*
4542 * cfg80211 should catch this ... but it's racy since
4543 * we can receive a disassoc frame, process it, hand it
4544 * to cfg80211 while that's in a locked section already
4545 * trying to tell us that the user wants to disconnect.
4546 */
8d61ffa5 4547 if (ifmgd->associated != req->bss)
77fdaa12 4548 return -ENOLINK;
77fdaa12 4549
bdcbd8e0 4550 sdata_info(sdata,
dfa1ad29
CO		 4551 "disassociating from %pM by local choice (Reason: %u=%s)\n",
4552 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
0ff71613 4553
e69e95db 4554 memcpy(bssid, req->bss->bssid, ETH_ALEN);
37ad3888
JB		 4555 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4556 req->reason_code, !req->local_state_change,
4557 frame_buf);
10f644a4 4558
6ff57cf8
JB		 4559 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4560 IEEE80211_DEAUTH_FRAME_LEN);
bc83b681 4561
10f644a4
JB		 4562 return 0;
4563}
026331c4 4564
afa762f6 4565void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
54e4ffb2
JB		 4566{
4567 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4568
49921859
BG		 4569 /*
4570 * Make sure some work items will not run after this,
4571 * they will not do anything but might not have been
4572 * cancelled when disconnecting.
4573 */
4574 cancel_work_sync(&ifmgd->monitor_work);
4575 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
4576 cancel_work_sync(&ifmgd->request_smps_work);
4577 cancel_work_sync(&ifmgd->csa_connection_drop_work);
4578 cancel_work_sync(&ifmgd->chswitch_work);
4579
8d61ffa5 4580 sdata_lock(sdata);
959867fa
JB		 4581 if (ifmgd->assoc_data) {
4582 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
54e4ffb2 4583 ieee80211_destroy_assoc_data(sdata, false);
959867fa
JB		 4584 cfg80211_assoc_timeout(sdata->dev, bss);
4585 }
54e4ffb2
JB		 4586 if (ifmgd->auth_data)
4587 ieee80211_destroy_auth_data(sdata, false);
4588 del_timer_sync(&ifmgd->timer);
8d61ffa5 4589 sdata_unlock(sdata);
54e4ffb2
JB		 4590}
4591
a97c13c3
JO		 4592void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
4593 enum nl80211_cqm_rssi_threshold_event rssi_event,
4594 gfp_t gfp)
4595{
4596 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4597
b5878a2d
JB		 4598 trace_api_cqm_rssi_notify(sdata, rssi_event);
4599
a97c13c3
JO		 4600 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
4601}
4602EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
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