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mac80211: use put_unaligned_le in mesh when necessary
[deliverable/linux.git] / net / mac80211 / mlme.c
CommitLineData
f0706e82
JB		 1/*
2 * BSS client mode implementation
5394af4d 3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
f0706e82
JB		 4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
5b323edb 14#include <linux/delay.h>
f0706e82
JB		 15#include <linux/if_ether.h>
16#include <linux/skbuff.h>
f0706e82 17#include <linux/if_arp.h>
f0706e82 18#include <linux/etherdevice.h>
d9b93842 19#include <linux/moduleparam.h>
d0709a65 20#include <linux/rtnetlink.h>
e8db0be1 21#include <linux/pm_qos.h>
d91f36db 22#include <linux/crc32.h>
5a0e3ad6 23#include <linux/slab.h>
bc3b2d7f 24#include <linux/export.h>
f0706e82 25#include <net/mac80211.h>
472dbc45 26#include <asm/unaligned.h>
60f8b39c 27
f0706e82 28#include "ieee80211_i.h"
24487981 29#include "driver-ops.h"
2c8dccc7
JB		 30#include "rate.h"
31#include "led.h"
f0706e82 32
1672c0e3 33#define IEEE80211_AUTH_TIMEOUT (HZ / 5)
cb236d2d 34#define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2)
1672c0e3
JB		 35#define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10)
36#define IEEE80211_AUTH_MAX_TRIES 3
37#define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
38#define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
cb236d2d 39#define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2)
1672c0e3
JB		 40#define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10)
41#define IEEE80211_ASSOC_MAX_TRIES 3
66e67e41 42
180205bd
BG		 43static int max_nullfunc_tries = 2;
44module_param(max_nullfunc_tries, int, 0644);
45MODULE_PARM_DESC(max_nullfunc_tries,
46 "Maximum nullfunc tx tries before disconnecting (reason 4).");
47
48static int max_probe_tries = 5;
49module_param(max_probe_tries, int, 0644);
50MODULE_PARM_DESC(max_probe_tries,
51 "Maximum probe tries before disconnecting (reason 4).");
b291ba11
JB		 52
53/*
7ccc8bd7
FF		 54 * Beacon loss timeout is calculated as N frames times the
55 * advertised beacon interval. This may need to be somewhat
56 * higher than what hardware might detect to account for
57 * delays in the host processing frames. But since we also
58 * probe on beacon miss before declaring the connection lost
59 * default to what we want.
b291ba11 60 */
59c1ec2b
BG		 61static int beacon_loss_count = 7;
62module_param(beacon_loss_count, int, 0644);
63MODULE_PARM_DESC(beacon_loss_count,
64 "Number of beacon intervals before we decide beacon was lost.");
7ccc8bd7 65
b291ba11
JB		 66/*
67 * Time the connection can be idle before we probe
68 * it to see if we can still talk to the AP.
69 */
d1c5091f 70#define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
b291ba11
JB		 71/*
72 * Time we wait for a probe response after sending
73 * a probe request because of beacon loss or for
74 * checking the connection still works.
75 */
180205bd
BG		 76static int probe_wait_ms = 500;
77module_param(probe_wait_ms, int, 0644);
78MODULE_PARM_DESC(probe_wait_ms,
79 "Maximum time(ms) to wait for probe response"
80 " before disconnecting (reason 4).");
f0706e82 81
17e4ec14
JM		 82/*
83 * Weight given to the latest Beacon frame when calculating average signal
84 * strength for Beacon frames received in the current BSS. This must be
85 * between 1 and 15.
86 */
87#define IEEE80211_SIGNAL_AVE_WEIGHT 3
88
391a200a
JM		 89/*
90 * How many Beacon frames need to have been used in average signal strength
91 * before starting to indicate signal change events.
92 */
93#define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
94
ca386f31
JB		 95/*
96 * We can have multiple work items (and connection probing)
97 * scheduling this timer, but we need to take care to only
98 * reschedule it when it should fire _earlier_ than it was
99 * asked for before, or if it's not pending right now. This
100 * function ensures that. Note that it then is required to
101 * run this function for all timeouts after the first one
102 * has happened -- the work that runs from this timer will
103 * do that.
104 */
8d61ffa5
JB		 105static void run_again(struct ieee80211_sub_if_data *sdata,
106 unsigned long timeout)
ca386f31 107{
8d61ffa5 108 sdata_assert_lock(sdata);
ca386f31 109
8d61ffa5
JB		 110 if (!timer_pending(&sdata->u.mgd.timer) ||
111 time_before(timeout, sdata->u.mgd.timer.expires))
112 mod_timer(&sdata->u.mgd.timer, timeout);
ca386f31
JB		 113}
114
d3a910a8 115void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
b291ba11 116{
c1288b12 117 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
b291ba11
JB		 118 return;
119
7eeff74c
JB		 120 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
121 return;
122
b291ba11 123 mod_timer(&sdata->u.mgd.bcn_mon_timer,
7ccc8bd7 124 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
b291ba11
JB		 125}
126
be099e82
LR		 127void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
128{
0c699c3a
LR		 129 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
130
8628172f
SG		 131 if (unlikely(!sdata->u.mgd.associated))
132 return;
133
be099e82
LR		 134 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
135 return;
136
137 mod_timer(&sdata->u.mgd.conn_mon_timer,
138 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
0c699c3a
LR		 139
140 ifmgd->probe_send_count = 0;
be099e82
LR		 141}
142
5484e237 143static int ecw2cw(int ecw)
60f8b39c 144{
5484e237 145 return (1 << ecw) - 1;
60f8b39c
JB		 146}
147
6565ec9b
JB		 148static u32
149ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
150 struct ieee80211_supported_band *sband,
151 struct ieee80211_channel *channel,
152 const struct ieee80211_ht_operation *ht_oper,
153 const struct ieee80211_vht_operation *vht_oper,
5cdaed1e 154 struct cfg80211_chan_def *chandef, bool tracking)
6565ec9b 155{
5cdaed1e 156 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6565ec9b
JB		 157 struct cfg80211_chan_def vht_chandef;
158 u32 ht_cfreq, ret;
159
160 chandef->chan = channel;
161 chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
162 chandef->center_freq1 = channel->center_freq;
163 chandef->center_freq2 = 0;
164
165 if (!ht_oper || !sband->ht_cap.ht_supported) {
166 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
167 goto out;
168 }
169
170 chandef->width = NL80211_CHAN_WIDTH_20;
171
172 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
173 channel->band);
174 /* check that channel matches the right operating channel */
5cdaed1e 175 if (!tracking && channel->center_freq != ht_cfreq) {
6565ec9b
JB		 176 /*
177 * It's possible that some APs are confused here;
178 * Netgear WNDR3700 sometimes reports 4 higher than
179 * the actual channel in association responses, but
180 * since we look at probe response/beacon data here
181 * it should be OK.
182 */
5cdaed1e
JB		 183 sdata_info(sdata,
184 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
185 channel->center_freq, ht_cfreq,
186 ht_oper->primary_chan, channel->band);
6565ec9b
JB		 187 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
188 goto out;
189 }
190
191 /* check 40 MHz support, if we have it */
192 if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
193 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
194 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
195 chandef->width = NL80211_CHAN_WIDTH_40;
196 chandef->center_freq1 += 10;
197 break;
198 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
199 chandef->width = NL80211_CHAN_WIDTH_40;
200 chandef->center_freq1 -= 10;
201 break;
202 }
203 } else {
204 /* 40 MHz (and 80 MHz) must be supported for VHT */
205 ret = IEEE80211_STA_DISABLE_VHT;
85220d71
JB		 206 /* also mark 40 MHz disabled */
207 ret |= IEEE80211_STA_DISABLE_40MHZ;
6565ec9b
JB		 208 goto out;
209 }
210
211 if (!vht_oper || !sband->vht_cap.vht_supported) {
212 ret = IEEE80211_STA_DISABLE_VHT;
213 goto out;
214 }
215
216 vht_chandef.chan = channel;
217 vht_chandef.center_freq1 =
218 ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx,
219 channel->band);
220 vht_chandef.center_freq2 = 0;
221
6565ec9b
JB		 222 switch (vht_oper->chan_width) {
223 case IEEE80211_VHT_CHANWIDTH_USE_HT:
224 vht_chandef.width = chandef->width;
225 break;
226 case IEEE80211_VHT_CHANWIDTH_80MHZ:
227 vht_chandef.width = NL80211_CHAN_WIDTH_80;
228 break;
229 case IEEE80211_VHT_CHANWIDTH_160MHZ:
230 vht_chandef.width = NL80211_CHAN_WIDTH_160;
231 break;
232 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
233 vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
6553bf04
JB		 234 vht_chandef.center_freq2 =
235 ieee80211_channel_to_frequency(
236 vht_oper->center_freq_seg2_idx,
237 channel->band);
6565ec9b
JB		 238 break;
239 default:
5cdaed1e 240 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
30eb1dc2
JB		 241 sdata_info(sdata,
242 "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
243 vht_oper->chan_width);
6565ec9b
JB		 244 ret = IEEE80211_STA_DISABLE_VHT;
245 goto out;
246 }
247
248 if (!cfg80211_chandef_valid(&vht_chandef)) {
5cdaed1e 249 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
30eb1dc2
JB		 250 sdata_info(sdata,
251 "AP VHT information is invalid, disable VHT\n");
6565ec9b
JB		 252 ret = IEEE80211_STA_DISABLE_VHT;
253 goto out;
254 }
255
256 if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
257 ret = 0;
258 goto out;
259 }
260
261 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
5cdaed1e 262 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
30eb1dc2
JB		 263 sdata_info(sdata,
264 "AP VHT information doesn't match HT, disable VHT\n");
6565ec9b
JB		 265 ret = IEEE80211_STA_DISABLE_VHT;
266 goto out;
267 }
268
269 *chandef = vht_chandef;
270
271 ret = 0;
272
273out:
586e01ed
JB		 274 /* don't print the message below for VHT mismatch if VHT is disabled */
275 if (ret & IEEE80211_STA_DISABLE_VHT)
276 vht_chandef = *chandef;
277
ddfe49b4
JB		 278 /*
279 * Ignore the DISABLED flag when we're already connected and only
280 * tracking the APs beacon for bandwidth changes - otherwise we
281 * might get disconnected here if we connect to an AP, update our
282 * regulatory information based on the AP's country IE and the
283 * information we have is wrong/outdated and disables the channel
284 * that we're actually using for the connection to the AP.
285 */
6565ec9b 286 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
ddfe49b4
JB		 287 tracking ? 0 :
288 IEEE80211_CHAN_DISABLED)) {
6565ec9b
JB		 289 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
290 ret = IEEE80211_STA_DISABLE_HT |
291 IEEE80211_STA_DISABLE_VHT;
b56e4b85 292 break;
6565ec9b
JB		 293 }
294
e6b7cde4 295 ret |= ieee80211_chandef_downgrade(chandef);
6565ec9b
JB		 296 }
297
5cdaed1e 298 if (chandef->width != vht_chandef.width && !tracking)
6565ec9b
JB		 299 sdata_info(sdata,
300 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
301
302 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
303 return ret;
304}
305
30eb1dc2
JB		 306static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
307 struct sta_info *sta,
308 const struct ieee80211_ht_operation *ht_oper,
309 const struct ieee80211_vht_operation *vht_oper,
310 const u8 *bssid, u32 *changed)
d5522e03
JB		 311{
312 struct ieee80211_local *local = sdata->local;
30eb1dc2 313 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d5522e03 314 struct ieee80211_supported_band *sband;
55de908a 315 struct ieee80211_channel *chan;
30eb1dc2 316 struct cfg80211_chan_def chandef;
9ed6bcce 317 u16 ht_opmode;
30eb1dc2
JB		 318 u32 flags;
319 enum ieee80211_sta_rx_bandwidth new_sta_bw;
320 int ret;
d5522e03 321
30eb1dc2
JB		 322 /* if HT was/is disabled, don't track any bandwidth changes */
323 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
1128958d
JB		 324 return 0;
325
30eb1dc2
JB		 326 /* don't check VHT if we associated as non-VHT station */
327 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
328 vht_oper = NULL;
329
330 if (WARN_ON_ONCE(!sta))
331 return -EINVAL;
332
f2d9330e 333 chan = sdata->vif.bss_conf.chandef.chan;
55de908a 334 sband = local->hw.wiphy->bands[chan->band];
d5522e03 335
30eb1dc2
JB		 336 /* calculate new channel (type) based on HT/VHT operation IEs */
337 flags = ieee80211_determine_chantype(sdata, sband, chan, ht_oper,
5cdaed1e 338 vht_oper, &chandef, true);
30eb1dc2
JB		 339
340 /*
341 * Downgrade the new channel if we associated with restricted
342 * capabilities. For example, if we associated as a 20 MHz STA
343 * to a 40 MHz AP (due to regulatory, capabilities or config
344 * reasons) then switching to a 40 MHz channel now won't do us
345 * any good -- we couldn't use it with the AP.
346 */
347 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
348 chandef.width == NL80211_CHAN_WIDTH_80P80)
e6b7cde4 349 flags |= ieee80211_chandef_downgrade(&chandef);
30eb1dc2
JB		 350 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
351 chandef.width == NL80211_CHAN_WIDTH_160)
e6b7cde4 352 flags |= ieee80211_chandef_downgrade(&chandef);
30eb1dc2
JB		 353 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
354 chandef.width > NL80211_CHAN_WIDTH_20)
e6b7cde4 355 flags |= ieee80211_chandef_downgrade(&chandef);
30eb1dc2
JB		 356
357 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
358 return 0;
359
360 sdata_info(sdata,
361 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
362 ifmgd->bssid, chandef.chan->center_freq, chandef.width,
363 chandef.center_freq1, chandef.center_freq2);
364
365 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
366 IEEE80211_STA_DISABLE_VHT |
367 IEEE80211_STA_DISABLE_40MHZ |
368 IEEE80211_STA_DISABLE_80P80MHZ |
369 IEEE80211_STA_DISABLE_160MHZ)) ||
370 !cfg80211_chandef_valid(&chandef)) {
371 sdata_info(sdata,
372 "AP %pM changed bandwidth in a way we can't support - disconnect\n",
373 ifmgd->bssid);
374 return -EINVAL;
375 }
376
377 switch (chandef.width) {
378 case NL80211_CHAN_WIDTH_20_NOHT:
379 case NL80211_CHAN_WIDTH_20:
380 new_sta_bw = IEEE80211_STA_RX_BW_20;
381 break;
4bf88530 382 case NL80211_CHAN_WIDTH_40:
30eb1dc2 383 new_sta_bw = IEEE80211_STA_RX_BW_40;
64f68e5d 384 break;
30eb1dc2
JB		 385 case NL80211_CHAN_WIDTH_80:
386 new_sta_bw = IEEE80211_STA_RX_BW_80;
387 break;
388 case NL80211_CHAN_WIDTH_80P80:
389 case NL80211_CHAN_WIDTH_160:
390 new_sta_bw = IEEE80211_STA_RX_BW_160;
64f68e5d 391 break;
30eb1dc2
JB		 392 default:
393 return -EINVAL;
64f68e5d 394 }
d5522e03 395
30eb1dc2
JB		 396 if (new_sta_bw > sta->cur_max_bandwidth)
397 new_sta_bw = sta->cur_max_bandwidth;
64f68e5d 398
30eb1dc2
JB		 399 if (new_sta_bw < sta->sta.bandwidth) {
400 sta->sta.bandwidth = new_sta_bw;
401 rate_control_rate_update(local, sband, sta,
402 IEEE80211_RC_BW_CHANGED);
403 }
64f68e5d 404
30eb1dc2
JB		 405 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
406 if (ret) {
407 sdata_info(sdata,
408 "AP %pM changed bandwidth to incompatible one - disconnect\n",
409 ifmgd->bssid);
410 return ret;
411 }
7cc44ed4 412
30eb1dc2
JB		 413 if (new_sta_bw > sta->sta.bandwidth) {
414 sta->sta.bandwidth = new_sta_bw;
415 rate_control_rate_update(local, sband, sta,
416 IEEE80211_RC_BW_CHANGED);
0aaffa9b 417 }
d5522e03 418
074d46d1 419 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
d5522e03
JB		 420
421 /* if bss configuration changed store the new one */
30eb1dc2
JB		 422 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
423 *changed |= BSS_CHANGED_HT;
9ed6bcce 424 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
d5522e03
JB		 425 }
426
30eb1dc2 427 return 0;
d5522e03
JB		 428}
429
9c6bd790
JB		 430/* frame sending functions */
431
66e67e41 432static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
9dde6423 433 struct sk_buff *skb, u8 ap_ht_param,
66e67e41
JB		 434 struct ieee80211_supported_band *sband,
435 struct ieee80211_channel *channel,
436 enum ieee80211_smps_mode smps)
437{
66e67e41
JB		 438 u8 *pos;
439 u32 flags = channel->flags;
440 u16 cap;
441 struct ieee80211_sta_ht_cap ht_cap;
442
443 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
444
66e67e41
JB		 445 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
446 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
447
66e67e41
JB		 448 /* determine capability flags */
449 cap = ht_cap.cap;
450
9dde6423 451 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
66e67e41
JB		 452 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
453 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
454 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
455 cap &= ~IEEE80211_HT_CAP_SGI_40;
456 }
457 break;
458 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
459 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
460 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
461 cap &= ~IEEE80211_HT_CAP_SGI_40;
462 }
463 break;
464 }
465
24398e39
JB		 466 /*
467 * If 40 MHz was disabled associate as though we weren't
468 * capable of 40 MHz -- some broken APs will never fall
469 * back to trying to transmit in 20 MHz.
470 */
471 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
472 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
473 cap &= ~IEEE80211_HT_CAP_SGI_40;
474 }
475
66e67e41
JB		 476 /* set SM PS mode properly */
477 cap &= ~IEEE80211_HT_CAP_SM_PS;
478 switch (smps) {
479 case IEEE80211_SMPS_AUTOMATIC:
480 case IEEE80211_SMPS_NUM_MODES:
481 WARN_ON(1);
482 case IEEE80211_SMPS_OFF:
483 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
484 IEEE80211_HT_CAP_SM_PS_SHIFT;
485 break;
486 case IEEE80211_SMPS_STATIC:
487 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
488 IEEE80211_HT_CAP_SM_PS_SHIFT;
489 break;
490 case IEEE80211_SMPS_DYNAMIC:
491 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
492 IEEE80211_HT_CAP_SM_PS_SHIFT;
493 break;
494 }
495
496 /* reserve and fill IE */
497 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
498 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
499}
500
d545daba
MP		 501static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
502 struct sk_buff *skb,
b08fbbd8
JB		 503 struct ieee80211_supported_band *sband,
504 struct ieee80211_vht_cap *ap_vht_cap)
d545daba
MP		 505{
506 u8 *pos;
507 u32 cap;
508 struct ieee80211_sta_vht_cap vht_cap;
509
510 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
511
512 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
dd5ecfea 513 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
d545daba
MP		 514
515 /* determine capability flags */
516 cap = vht_cap.cap;
517
f2d9d270
JB		 518 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
519 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ;
520 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
521 }
522
523 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
524 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
525 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
526 }
527
b08fbbd8
JB		 528 /*
529 * Some APs apparently get confused if our capabilities are better
530 * than theirs, so restrict what we advertise in the assoc request.
531 */
532 if (!(ap_vht_cap->vht_cap_info &
533 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
534 cap &= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE;
535
d545daba 536 /* reserve and fill IE */
d4950281 537 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
d545daba
MP		 538 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
539}
540
66e67e41
JB		 541static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
542{
543 struct ieee80211_local *local = sdata->local;
544 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
545 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
546 struct sk_buff *skb;
547 struct ieee80211_mgmt *mgmt;
548 u8 *pos, qos_info;
549 size_t offset = 0, noffset;
2103dec1 550 int i, count, rates_len, supp_rates_len, shift;
66e67e41
JB		 551 u16 capab;
552 struct ieee80211_supported_band *sband;
55de908a
JB		 553 struct ieee80211_chanctx_conf *chanctx_conf;
554 struct ieee80211_channel *chan;
2103dec1 555 u32 rate_flags, rates = 0;
66e67e41 556
8d61ffa5 557 sdata_assert_lock(sdata);
66e67e41 558
55de908a
JB		 559 rcu_read_lock();
560 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
561 if (WARN_ON(!chanctx_conf)) {
562 rcu_read_unlock();
563 return;
564 }
4bf88530 565 chan = chanctx_conf->def.chan;
2103dec1 566 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
55de908a
JB		 567 rcu_read_unlock();
568 sband = local->hw.wiphy->bands[chan->band];
2103dec1 569 shift = ieee80211_vif_get_shift(&sdata->vif);
66e67e41
JB		 570
571 if (assoc_data->supp_rates_len) {
572 /*
573 * Get all rates supported by the device and the AP as
574 * some APs don't like getting a superset of their rates
575 * in the association request (e.g. D-Link DAP 1353 in
576 * b-only mode)...
577 */
2103dec1
SW		 578 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
579 assoc_data->supp_rates,
580 assoc_data->supp_rates_len,
581 &rates);
66e67e41
JB		 582 } else {
583 /*
584 * In case AP not provide any supported rates information
585 * before association, we send information element(s) with
586 * all rates that we support.
587 */
2103dec1
SW		 588 rates_len = 0;
589 for (i = 0; i < sband->n_bitrates; i++) {
590 if ((rate_flags & sband->bitrates[i].flags)
591 != rate_flags)
592 continue;
593 rates |= BIT(i);
594 rates_len++;
595 }
66e67e41
JB		 596 }
597
598 skb = alloc_skb(local->hw.extra_tx_headroom +
599 sizeof(*mgmt) + /* bit too much but doesn't matter */
600 2 + assoc_data->ssid_len + /* SSID */
601 4 + rates_len + /* (extended) rates */
602 4 + /* power capability */
603 2 + 2 * sband->n_channels + /* supported channels */
604 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
d4950281 605 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
66e67e41
JB		 606 assoc_data->ie_len + /* extra IEs */
607 9, /* WMM */
608 GFP_KERNEL);
609 if (!skb)
610 return;
611
612 skb_reserve(skb, local->hw.extra_tx_headroom);
613
614 capab = WLAN_CAPABILITY_ESS;
615
616 if (sband->band == IEEE80211_BAND_2GHZ) {
617 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
618 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
619 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
620 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
621 }
622
623 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
624 capab |= WLAN_CAPABILITY_PRIVACY;
625
626 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
627 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
628 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
629
630 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
631 memset(mgmt, 0, 24);
632 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
633 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
634 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
635
636 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
637 skb_put(skb, 10);
638 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
639 IEEE80211_STYPE_REASSOC_REQ);
640 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
641 mgmt->u.reassoc_req.listen_interval =
642 cpu_to_le16(local->hw.conf.listen_interval);
643 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
644 ETH_ALEN);
645 } else {
646 skb_put(skb, 4);
647 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
648 IEEE80211_STYPE_ASSOC_REQ);
649 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
650 mgmt->u.assoc_req.listen_interval =
651 cpu_to_le16(local->hw.conf.listen_interval);
652 }
653
654 /* SSID */
655 pos = skb_put(skb, 2 + assoc_data->ssid_len);
656 *pos++ = WLAN_EID_SSID;
657 *pos++ = assoc_data->ssid_len;
658 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
659
660 /* add all rates which were marked to be used above */
661 supp_rates_len = rates_len;
662 if (supp_rates_len > 8)
663 supp_rates_len = 8;
664
665 pos = skb_put(skb, supp_rates_len + 2);
666 *pos++ = WLAN_EID_SUPP_RATES;
667 *pos++ = supp_rates_len;
668
669 count = 0;
670 for (i = 0; i < sband->n_bitrates; i++) {
671 if (BIT(i) & rates) {
2103dec1
SW		 672 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
673 5 * (1 << shift));
674 *pos++ = (u8) rate;
66e67e41
JB		 675 if (++count == 8)
676 break;
677 }
678 }
679
680 if (rates_len > count) {
681 pos = skb_put(skb, rates_len - count + 2);
682 *pos++ = WLAN_EID_EXT_SUPP_RATES;
683 *pos++ = rates_len - count;
684
685 for (i++; i < sband->n_bitrates; i++) {
686 if (BIT(i) & rates) {
2103dec1
SW		 687 int rate;
688 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
689 5 * (1 << shift));
690 *pos++ = (u8) rate;
66e67e41
JB		 691 }
692 }
693 }
694
695 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
696 /* 1. power capabilities */
697 pos = skb_put(skb, 4);
698 *pos++ = WLAN_EID_PWR_CAPABILITY;
699 *pos++ = 2;
700 *pos++ = 0; /* min tx power */
0430c883
SW		 701 /* max tx power */
702 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
66e67e41
JB		 703
704 /* 2. supported channels */
705 /* TODO: get this in reg domain format */
706 pos = skb_put(skb, 2 * sband->n_channels + 2);
707 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
708 *pos++ = 2 * sband->n_channels;
709 for (i = 0; i < sband->n_channels; i++) {
710 *pos++ = ieee80211_frequency_to_channel(
711 sband->channels[i].center_freq);
712 *pos++ = 1; /* one channel in the subband*/
713 }
714 }
715
716 /* if present, add any custom IEs that go before HT */
b3f51e94 717 if (assoc_data->ie_len) {
66e67e41
JB		 718 static const u8 before_ht[] = {
719 WLAN_EID_SSID,
720 WLAN_EID_SUPP_RATES,
721 WLAN_EID_EXT_SUPP_RATES,
722 WLAN_EID_PWR_CAPABILITY,
723 WLAN_EID_SUPPORTED_CHANNELS,
724 WLAN_EID_RSN,
725 WLAN_EID_QOS_CAPA,
726 WLAN_EID_RRM_ENABLED_CAPABILITIES,
727 WLAN_EID_MOBILITY_DOMAIN,
728 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
729 };
730 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
731 before_ht, ARRAY_SIZE(before_ht),
732 offset);
733 pos = skb_put(skb, noffset - offset);
734 memcpy(pos, assoc_data->ie + offset, noffset - offset);
735 offset = noffset;
736 }
737
f2d9d270
JB		 738 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
739 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
740 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
741
a8243b72 742 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
9dde6423 743 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
04ecd257 744 sband, chan, sdata->smps_mode);
66e67e41 745
d545daba 746 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
b08fbbd8
JB		 747 ieee80211_add_vht_ie(sdata, skb, sband,
748 &assoc_data->ap_vht_cap);
d545daba 749
66e67e41 750 /* if present, add any custom non-vendor IEs that go after HT */
b3f51e94 751 if (assoc_data->ie_len) {
66e67e41
JB		 752 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
753 assoc_data->ie_len,
754 offset);
755 pos = skb_put(skb, noffset - offset);
756 memcpy(pos, assoc_data->ie + offset, noffset - offset);
757 offset = noffset;
758 }
759
76f0303d
JB		 760 if (assoc_data->wmm) {
761 if (assoc_data->uapsd) {
dc41e4d4
EP		 762 qos_info = ifmgd->uapsd_queues;
763 qos_info |= (ifmgd->uapsd_max_sp_len <<
66e67e41
JB		 764 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
765 } else {
766 qos_info = 0;
767 }
768
769 pos = skb_put(skb, 9);
770 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
771 *pos++ = 7; /* len */
772 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
773 *pos++ = 0x50;
774 *pos++ = 0xf2;
775 *pos++ = 2; /* WME */
776 *pos++ = 0; /* WME info */
777 *pos++ = 1; /* WME ver */
778 *pos++ = qos_info;
779 }
780
781 /* add any remaining custom (i.e. vendor specific here) IEs */
b3f51e94 782 if (assoc_data->ie_len) {
66e67e41
JB		 783 noffset = assoc_data->ie_len;
784 pos = skb_put(skb, noffset - offset);
785 memcpy(pos, assoc_data->ie + offset, noffset - offset);
786 }
787
a1845fc7
JB		 788 drv_mgd_prepare_tx(local, sdata);
789
66e67e41 790 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1672c0e3
JB		 791 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
792 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
793 IEEE80211_TX_INTFL_MLME_CONN_TX;
66e67e41
JB		 794 ieee80211_tx_skb(sdata, skb);
795}
796
572e0012
KV		 797void ieee80211_send_pspoll(struct ieee80211_local *local,
798 struct ieee80211_sub_if_data *sdata)
799{
572e0012
KV		 800 struct ieee80211_pspoll *pspoll;
801 struct sk_buff *skb;
572e0012 802
d8cd189e
KV		 803 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
804 if (!skb)
572e0012 805 return;
572e0012 806
d8cd189e
KV		 807 pspoll = (struct ieee80211_pspoll *) skb->data;
808 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
572e0012 809
62ae67be
JB		 810 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
811 ieee80211_tx_skb(sdata, skb);
572e0012
KV		 812}
813
965bedad
JB		 814void ieee80211_send_nullfunc(struct ieee80211_local *local,
815 struct ieee80211_sub_if_data *sdata,
816 int powersave)
817{
818 struct sk_buff *skb;
d8cd189e 819 struct ieee80211_hdr_3addr *nullfunc;
b6f35301 820 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
965bedad 821
d8cd189e
KV		 822 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
823 if (!skb)
965bedad 824 return;
965bedad 825
d8cd189e 826 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
965bedad 827 if (powersave)
d8cd189e 828 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
965bedad 829
6c17b77b
SF		 830 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
831 IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
ff40b425
PF		 832
833 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
834 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
835
392b9ffb 836 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
b6f35301
RM		 837 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
838
62ae67be 839 ieee80211_tx_skb(sdata, skb);
965bedad
JB		 840}
841
d524215f
FF		 842static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
843 struct ieee80211_sub_if_data *sdata)
844{
845 struct sk_buff *skb;
846 struct ieee80211_hdr *nullfunc;
847 __le16 fc;
848
849 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
850 return;
851
852 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
d15b8459 853 if (!skb)
d524215f 854 return;
d15b8459 855
d524215f
FF		 856 skb_reserve(skb, local->hw.extra_tx_headroom);
857
858 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
859 memset(nullfunc, 0, 30);
860 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
861 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
862 nullfunc->frame_control = fc;
863 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
864 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
865 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
866 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
867
868 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
869 ieee80211_tx_skb(sdata, skb);
870}
871
cc32abd4
JB		 872/* spectrum management related things */
873static void ieee80211_chswitch_work(struct work_struct *work)
874{
875 struct ieee80211_sub_if_data *sdata =
876 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
675a0b04 877 struct ieee80211_local *local = sdata->local;
cc32abd4 878 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
7578d575
AN		 879 u32 changed = 0;
880 int ret;
cc32abd4 881
9607e6b6 882 if (!ieee80211_sdata_running(sdata))
cc32abd4
JB		 883 return;
884
8d61ffa5 885 sdata_lock(sdata);
77fdaa12
JB		 886 if (!ifmgd->associated)
887 goto out;
cc32abd4 888
7578d575
AN		 889 ret = ieee80211_vif_change_channel(sdata, &local->csa_chandef,
890 &changed);
891 if (ret) {
892 sdata_info(sdata,
893 "vif channel switch failed, disconnecting\n");
894 ieee80211_queue_work(&sdata->local->hw,
895 &ifmgd->csa_connection_drop_work);
896 goto out;
897 }
675a0b04 898
7578d575
AN		 899 if (!local->use_chanctx) {
900 local->_oper_chandef = local->csa_chandef;
901 /* Call "hw_config" only if doing sw channel switch.
902 * Otherwise update the channel directly
903 */
904 if (!local->ops->channel_switch)
905 ieee80211_hw_config(local, 0);
906 else
907 local->hw.conf.chandef = local->_oper_chandef;
5ce6e438 908 }
77fdaa12 909
cc32abd4 910 /* XXX: shouldn't really modify cfg80211-owned data! */
7578d575 911 ifmgd->associated->channel = local->csa_chandef.chan;
cc32abd4 912
57eebdf3 913 /* XXX: wait for a beacon first? */
675a0b04 914 ieee80211_wake_queues_by_reason(&local->hw,
445ea4e8 915 IEEE80211_MAX_QUEUE_MAP,
cc32abd4 916 IEEE80211_QUEUE_STOP_REASON_CSA);
7578d575
AN		 917
918 ieee80211_bss_info_change_notify(sdata, changed);
919
77fdaa12 920 out:
7578d575 921 sdata->vif.csa_active = false;
77fdaa12 922 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
8d61ffa5 923 sdata_unlock(sdata);
cc32abd4
JB		 924}
925
5ce6e438
JB		 926void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
927{
55de908a
JB		 928 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
929 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5ce6e438
JB		 930
931 trace_api_chswitch_done(sdata, success);
932 if (!success) {
882a7c69
JB		 933 sdata_info(sdata,
934 "driver channel switch failed, disconnecting\n");
935 ieee80211_queue_work(&sdata->local->hw,
936 &ifmgd->csa_connection_drop_work);
937 } else {
938 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
5ce6e438 939 }
5ce6e438
JB		 940}
941EXPORT_SYMBOL(ieee80211_chswitch_done);
942
cc32abd4
JB		 943static void ieee80211_chswitch_timer(unsigned long data)
944{
945 struct ieee80211_sub_if_data *sdata =
946 (struct ieee80211_sub_if_data *) data;
5bb644a0 947
9b7d72c1 948 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
cc32abd4
JB		 949}
950
37799e52 951static void
4a3cb702 952ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
04a161f4
JB		 953 u64 timestamp, struct ieee802_11_elems *elems,
954 bool beacon)
cc32abd4 955{
b4f286a1 956 struct ieee80211_local *local = sdata->local;
cc32abd4 957 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
37799e52 958 struct cfg80211_bss *cbss = ifmgd->associated;
55de908a 959 struct ieee80211_chanctx *chanctx;
e6b7cde4 960 enum ieee80211_band current_band;
c0f17eb9 961 struct ieee80211_csa_ie csa_ie;
e6b7cde4 962 int res;
cc32abd4 963
8d61ffa5 964 sdata_assert_lock(sdata);
77fdaa12 965
37799e52 966 if (!cbss)
cc32abd4
JB		 967 return;
968
b4f286a1 969 if (local->scanning)
cc32abd4
JB		 970 return;
971
37799e52 972 /* disregard subsequent announcements if we are already processing */
cc32abd4
JB		 973 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
974 return;
975
e6b7cde4 976 current_band = cbss->channel->band;
c0f17eb9 977 memset(&csa_ie, 0, sizeof(csa_ie));
e6b7cde4
SW		 978 res = ieee80211_parse_ch_switch_ie(sdata, elems, beacon, current_band,
979 ifmgd->flags,
c0f17eb9 980 ifmgd->associated->bssid, &csa_ie);
e6b7cde4 981 if (res < 0)
b4f286a1 982 ieee80211_queue_work(&local->hw,
882a7c69 983 &ifmgd->csa_connection_drop_work);
e6b7cde4 984 if (res)
cc32abd4 985 return;
cd64f2a9 986
c0f17eb9 987 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
85220d71
JB		 988 IEEE80211_CHAN_DISABLED)) {
989 sdata_info(sdata,
990 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
e6b7cde4 991 ifmgd->associated->bssid,
c0f17eb9
CYY		 992 csa_ie.chandef.chan->center_freq,
993 csa_ie.chandef.width, csa_ie.chandef.center_freq1,
994 csa_ie.chandef.center_freq2);
85220d71
JB		 995 ieee80211_queue_work(&local->hw,
996 &ifmgd->csa_connection_drop_work);
997 return;
998 }
999
57eebdf3 1000 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
7578d575 1001 sdata->vif.csa_active = true;
57eebdf3 1002
7578d575 1003 mutex_lock(&local->chanctx_mtx);
b4f286a1 1004 if (local->use_chanctx) {
7578d575
AN		 1005 u32 num_chanctx = 0;
1006 list_for_each_entry(chanctx, &local->chanctx_list, list)
1007 num_chanctx++;
1008
1009 if (num_chanctx > 1 ||
1010 !(local->hw.flags & IEEE80211_HW_CHANCTX_STA_CSA)) {
1011 sdata_info(sdata,
1012 "not handling chan-switch with channel contexts\n");
1013 ieee80211_queue_work(&local->hw,
1014 &ifmgd->csa_connection_drop_work);
1015 mutex_unlock(&local->chanctx_mtx);
1016 return;
1017 }
55de908a
JB		 1018 }
1019
55de908a 1020 if (WARN_ON(!rcu_access_pointer(sdata->vif.chanctx_conf))) {
7578d575
AN		 1021 ieee80211_queue_work(&local->hw,
1022 &ifmgd->csa_connection_drop_work);
b4f286a1 1023 mutex_unlock(&local->chanctx_mtx);
55de908a
JB		 1024 return;
1025 }
1026 chanctx = container_of(rcu_access_pointer(sdata->vif.chanctx_conf),
1027 struct ieee80211_chanctx, conf);
1028 if (chanctx->refcount > 1) {
1029 sdata_info(sdata,
1030 "channel switch with multiple interfaces on the same channel, disconnecting\n");
b4f286a1 1031 ieee80211_queue_work(&local->hw,
55de908a 1032 &ifmgd->csa_connection_drop_work);
b4f286a1 1033 mutex_unlock(&local->chanctx_mtx);
55de908a
JB		 1034 return;
1035 }
b4f286a1 1036 mutex_unlock(&local->chanctx_mtx);
55de908a 1037
c0f17eb9 1038 local->csa_chandef = csa_ie.chandef;
55de908a 1039
c0f17eb9 1040 if (csa_ie.mode)
b4f286a1 1041 ieee80211_stop_queues_by_reason(&local->hw,
445ea4e8 1042 IEEE80211_MAX_QUEUE_MAP,
57eebdf3
JB		 1043 IEEE80211_QUEUE_STOP_REASON_CSA);
1044
b4f286a1 1045 if (local->ops->channel_switch) {
5ce6e438 1046 /* use driver's channel switch callback */
57eebdf3
JB		 1047 struct ieee80211_channel_switch ch_switch = {
1048 .timestamp = timestamp,
c0f17eb9
CYY		 1049 .block_tx = csa_ie.mode,
1050 .chandef = csa_ie.chandef,
1051 .count = csa_ie.count,
57eebdf3
JB		 1052 };
1053
b4f286a1 1054 drv_channel_switch(local, &ch_switch);
5ce6e438
JB		 1055 return;
1056 }
1057
1058 /* channel switch handled in software */
c0f17eb9 1059 if (csa_ie.count <= 1)
b4f286a1 1060 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
57eebdf3 1061 else
cc32abd4 1062 mod_timer(&ifmgd->chswitch_timer,
c0f17eb9 1063 TU_TO_EXP_TIME(csa_ie.count * cbss->beacon_interval));
cc32abd4
JB		 1064}
1065
1ea6f9c0
JB		 1066static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1067 struct ieee80211_channel *channel,
1068 const u8 *country_ie, u8 country_ie_len,
1069 const u8 *pwr_constr_elem)
cc32abd4 1070{
04b7b2ff
JB		 1071 struct ieee80211_country_ie_triplet *triplet;
1072 int chan = ieee80211_frequency_to_channel(channel->center_freq);
1073 int i, chan_pwr, chan_increment, new_ap_level;
1074 bool have_chan_pwr = false;
cc32abd4 1075
04b7b2ff
JB		 1076 /* Invalid IE */
1077 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1ea6f9c0 1078 return 0;
cc32abd4 1079
04b7b2ff
JB		 1080 triplet = (void *)(country_ie + 3);
1081 country_ie_len -= 3;
1082
1083 switch (channel->band) {
1084 default:
1085 WARN_ON_ONCE(1);
1086 /* fall through */
1087 case IEEE80211_BAND_2GHZ:
1088 case IEEE80211_BAND_60GHZ:
1089 chan_increment = 1;
1090 break;
1091 case IEEE80211_BAND_5GHZ:
1092 chan_increment = 4;
1093 break;
cc32abd4 1094 }
04b7b2ff
JB		 1095
1096 /* find channel */
1097 while (country_ie_len >= 3) {
1098 u8 first_channel = triplet->chans.first_channel;
1099
1100 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1101 goto next;
1102
1103 for (i = 0; i < triplet->chans.num_channels; i++) {
1104 if (first_channel + i * chan_increment == chan) {
1105 have_chan_pwr = true;
1106 chan_pwr = triplet->chans.max_power;
1107 break;
1108 }
1109 }
1110 if (have_chan_pwr)
1111 break;
1112
1113 next:
1114 triplet++;
1115 country_ie_len -= 3;
1116 }
1117
1118 if (!have_chan_pwr)
1ea6f9c0 1119 return 0;
04b7b2ff
JB		 1120
1121 new_ap_level = max_t(int, 0, chan_pwr - *pwr_constr_elem);
1122
1ea6f9c0
JB		 1123 if (sdata->ap_power_level == new_ap_level)
1124 return 0;
04b7b2ff
JB		 1125
1126 sdata_info(sdata,
1127 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1128 new_ap_level, chan_pwr, *pwr_constr_elem,
1129 sdata->u.mgd.bssid);
1ea6f9c0
JB		 1130 sdata->ap_power_level = new_ap_level;
1131 if (__ieee80211_recalc_txpower(sdata))
1132 return BSS_CHANGED_TXPOWER;
1133 return 0;
cc32abd4
JB		 1134}
1135
965bedad
JB		 1136/* powersave */
1137static void ieee80211_enable_ps(struct ieee80211_local *local,
1138 struct ieee80211_sub_if_data *sdata)
1139{
1140 struct ieee80211_conf *conf = &local->hw.conf;
1141
d5edaedc
JB		 1142 /*
1143 * If we are scanning right now then the parameters will
1144 * take effect when scan finishes.
1145 */
fbe9c429 1146 if (local->scanning)
d5edaedc
JB		 1147 return;
1148
965bedad
JB		 1149 if (conf->dynamic_ps_timeout > 0 &&
1150 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
1151 mod_timer(&local->dynamic_ps_timer, jiffies +
1152 msecs_to_jiffies(conf->dynamic_ps_timeout));
1153 } else {
1154 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1155 ieee80211_send_nullfunc(local, sdata, 1);
375177bf 1156
2a13052f
JO		 1157 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1158 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
1159 return;
1160
1161 conf->flags |= IEEE80211_CONF_PS;
1162 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965bedad
JB		 1163 }
1164}
1165
1166static void ieee80211_change_ps(struct ieee80211_local *local)
1167{
1168 struct ieee80211_conf *conf = &local->hw.conf;
1169
1170 if (local->ps_sdata) {
965bedad
JB		 1171 ieee80211_enable_ps(local, local->ps_sdata);
1172 } else if (conf->flags & IEEE80211_CONF_PS) {
1173 conf->flags &= ~IEEE80211_CONF_PS;
1174 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1175 del_timer_sync(&local->dynamic_ps_timer);
1176 cancel_work_sync(&local->dynamic_ps_enable_work);
1177 }
1178}
1179
808118cb
JY		 1180static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1181{
1182 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1183 struct sta_info *sta = NULL;
c2c98fde 1184 bool authorized = false;
808118cb
JY		 1185
1186 if (!mgd->powersave)
1187 return false;
1188
05cb9108
JB		 1189 if (mgd->broken_ap)
1190 return false;
1191
808118cb
JY		 1192 if (!mgd->associated)
1193 return false;
1194
392b9ffb 1195 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
808118cb
JY		 1196 return false;
1197
989c6505 1198 if (!mgd->have_beacon)
ce857888
AB		 1199 return false;
1200
808118cb
JY		 1201 rcu_read_lock();
1202 sta = sta_info_get(sdata, mgd->bssid);
1203 if (sta)
c2c98fde 1204 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
808118cb
JY		 1205 rcu_read_unlock();
1206
c2c98fde 1207 return authorized;
808118cb
JY		 1208}
1209
965bedad 1210/* need to hold RTNL or interface lock */
10f644a4 1211void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 1212{
1213 struct ieee80211_sub_if_data *sdata, *found = NULL;
1214 int count = 0;
195e294d 1215 int timeout;
965bedad
JB		 1216
1217 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
1218 local->ps_sdata = NULL;
1219 return;
1220 }
1221
1222 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 1223 if (!ieee80211_sdata_running(sdata))
965bedad 1224 continue;
8c7914de
RM		 1225 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1226 /* If an AP vif is found, then disable PS
1227 * by setting the count to zero thereby setting
1228 * ps_sdata to NULL.
1229 */
1230 count = 0;
1231 break;
1232 }
965bedad
JB		 1233 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1234 continue;
1235 found = sdata;
1236 count++;
1237 }
1238
808118cb 1239 if (count == 1 && ieee80211_powersave_allowed(found)) {
10f644a4
JB		 1240 s32 beaconint_us;
1241
1242 if (latency < 0)
ed77134b 1243 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
10f644a4
JB		 1244
1245 beaconint_us = ieee80211_tu_to_usec(
1246 found->vif.bss_conf.beacon_int);
1247
ff616381 1248 timeout = local->dynamic_ps_forced_timeout;
195e294d
JO		 1249 if (timeout < 0) {
1250 /*
ff616381
JO		 1251 * Go to full PSM if the user configures a very low
1252 * latency requirement.
0ab82b04
EP		 1253 * The 2000 second value is there for compatibility
1254 * until the PM_QOS_NETWORK_LATENCY is configured
1255 * with real values.
195e294d 1256 */
0ab82b04
EP		 1257 if (latency > (1900 * USEC_PER_MSEC) &&
1258 latency != (2000 * USEC_PER_SEC))
195e294d 1259 timeout = 0;
ff616381
JO		 1260 else
1261 timeout = 100;
195e294d 1262 }
09b85568 1263 local->hw.conf.dynamic_ps_timeout = timeout;
195e294d 1264
04fe2037 1265 if (beaconint_us > latency) {
10f644a4 1266 local->ps_sdata = NULL;
04fe2037 1267 } else {
04fe2037 1268 int maxslp = 1;
826262c3 1269 u8 dtimper = found->u.mgd.dtim_period;
56007a02
JB		 1270
1271 /* If the TIM IE is invalid, pretend the value is 1 */
1272 if (!dtimper)
1273 dtimper = 1;
1274 else if (dtimper > 1)
04fe2037
JB		 1275 maxslp = min_t(int, dtimper,
1276 latency / beaconint_us);
1277
9ccebe61 1278 local->hw.conf.max_sleep_period = maxslp;
56007a02 1279 local->hw.conf.ps_dtim_period = dtimper;
10f644a4 1280 local->ps_sdata = found;
04fe2037 1281 }
10f644a4 1282 } else {
965bedad 1283 local->ps_sdata = NULL;
10f644a4 1284 }
965bedad
JB		 1285
1286 ieee80211_change_ps(local);
1287}
1288
ab095877
EP		 1289void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1290{
1291 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1292
1293 if (sdata->vif.bss_conf.ps != ps_allowed) {
1294 sdata->vif.bss_conf.ps = ps_allowed;
1295 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1296 }
1297}
1298
965bedad
JB		 1299void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1300{
1301 struct ieee80211_local *local =
1302 container_of(work, struct ieee80211_local,
1303 dynamic_ps_disable_work);
1304
1305 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1306 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1307 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1308 }
1309
1310 ieee80211_wake_queues_by_reason(&local->hw,
445ea4e8 1311 IEEE80211_MAX_QUEUE_MAP,
965bedad
JB		 1312 IEEE80211_QUEUE_STOP_REASON_PS);
1313}
1314
1315void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1316{
1317 struct ieee80211_local *local =
1318 container_of(work, struct ieee80211_local,
1319 dynamic_ps_enable_work);
1320 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
5e34069c 1321 struct ieee80211_if_managed *ifmgd;
1ddc2867
RM		 1322 unsigned long flags;
1323 int q;
965bedad
JB		 1324
1325 /* can only happen when PS was just disabled anyway */
1326 if (!sdata)
1327 return;
1328
5e34069c
CL		 1329 ifmgd = &sdata->u.mgd;
1330
965bedad
JB		 1331 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1332 return;
1333
09b85568 1334 if (local->hw.conf.dynamic_ps_timeout > 0) {
77b7023a
AN		 1335 /* don't enter PS if TX frames are pending */
1336 if (drv_tx_frames_pending(local)) {
1ddc2867
RM		 1337 mod_timer(&local->dynamic_ps_timer, jiffies +
1338 msecs_to_jiffies(
1339 local->hw.conf.dynamic_ps_timeout));
1340 return;
1341 }
77b7023a
AN		 1342
1343 /*
1344 * transmission can be stopped by others which leads to
1345 * dynamic_ps_timer expiry. Postpone the ps timer if it
1346 * is not the actual idle state.
1347 */
1348 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1349 for (q = 0; q < local->hw.queues; q++) {
1350 if (local->queue_stop_reasons[q]) {
1351 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1352 flags);
1353 mod_timer(&local->dynamic_ps_timer, jiffies +
1354 msecs_to_jiffies(
1355 local->hw.conf.dynamic_ps_timeout));
1356 return;
1357 }
1358 }
1359 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1ddc2867 1360 }
1ddc2867 1361
375177bf 1362 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
9c38a8b4 1363 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
a1598383 1364 if (drv_tx_frames_pending(local)) {
e8306f98
VN		 1365 mod_timer(&local->dynamic_ps_timer, jiffies +
1366 msecs_to_jiffies(
1367 local->hw.conf.dynamic_ps_timeout));
a1598383 1368 } else {
e8306f98
VN		 1369 ieee80211_send_nullfunc(local, sdata, 1);
1370 /* Flush to get the tx status of nullfunc frame */
39ecc01d 1371 ieee80211_flush_queues(local, sdata);
e8306f98 1372 }
f3e85b9e
VN		 1373 }
1374
2a13052f
JO		 1375 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1376 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
375177bf
VN		 1377 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1378 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1379 local->hw.conf.flags |= IEEE80211_CONF_PS;
1380 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1381 }
965bedad
JB		 1382}
1383
1384void ieee80211_dynamic_ps_timer(unsigned long data)
1385{
1386 struct ieee80211_local *local = (void *) data;
1387
78f1a8b7 1388 if (local->quiescing || local->suspended)
5bb644a0
JB		 1389 return;
1390
42935eca 1391 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 1392}
1393
164eb02d
SW		 1394void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1395{
1396 struct delayed_work *delayed_work =
1397 container_of(work, struct delayed_work, work);
1398 struct ieee80211_sub_if_data *sdata =
1399 container_of(delayed_work, struct ieee80211_sub_if_data,
1400 dfs_cac_timer_work);
d2859df5 1401 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
164eb02d
SW		 1402
1403 ieee80211_vif_release_channel(sdata);
d2859df5
JD		 1404 cfg80211_cac_event(sdata->dev, &chandef,
1405 NL80211_RADAR_CAC_FINISHED,
1406 GFP_KERNEL);
164eb02d
SW		 1407}
1408
60f8b39c 1409/* MLME */
7d25745d 1410static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
4ced3f74 1411 struct ieee80211_sub_if_data *sdata,
4a3cb702 1412 const u8 *wmm_param, size_t wmm_param_len)
f0706e82 1413{
f0706e82 1414 struct ieee80211_tx_queue_params params;
4ced3f74 1415 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1416 size_t left;
1417 int count;
4a3cb702
JB		 1418 const u8 *pos;
1419 u8 uapsd_queues = 0;
f0706e82 1420
e1b3ec1a 1421 if (!local->ops->conf_tx)
7d25745d 1422 return false;
e1b3ec1a 1423
32c5057b 1424 if (local->hw.queues < IEEE80211_NUM_ACS)
7d25745d 1425 return false;
3434fbd3
JB		 1426
1427 if (!wmm_param)
7d25745d 1428 return false;
3434fbd3 1429
f0706e82 1430 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
7d25745d 1431 return false;
ab13315a
KV		 1432
1433 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
dc41e4d4 1434 uapsd_queues = ifmgd->uapsd_queues;
ab13315a 1435
f0706e82 1436 count = wmm_param[6] & 0x0f;
46900298 1437 if (count == ifmgd->wmm_last_param_set)
7d25745d 1438 return false;
46900298 1439 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 1440
1441 pos = wmm_param + 8;
1442 left = wmm_param_len - 8;
1443
1444 memset(&params, 0, sizeof(params));
1445
00e96dec 1446 sdata->wmm_acm = 0;
f0706e82
JB		 1447 for (; left >= 4; left -= 4, pos += 4) {
1448 int aci = (pos[0] >> 5) & 0x03;
1449 int acm = (pos[0] >> 4) & 0x01;
ab13315a 1450 bool uapsd = false;
f0706e82
JB		 1451 int queue;
1452
1453 switch (aci) {
0eeb59fe 1454 case 1: /* AC_BK */
e100bb64 1455 queue = 3;
988c0f72 1456 if (acm)
00e96dec 1457 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV		 1458 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1459 uapsd = true;
f0706e82 1460 break;
0eeb59fe 1461 case 2: /* AC_VI */
e100bb64 1462 queue = 1;
988c0f72 1463 if (acm)
00e96dec 1464 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV		 1465 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1466 uapsd = true;
f0706e82 1467 break;
0eeb59fe 1468 case 3: /* AC_VO */
e100bb64 1469 queue = 0;
988c0f72 1470 if (acm)
00e96dec 1471 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV		 1472 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1473 uapsd = true;
f0706e82 1474 break;
0eeb59fe 1475 case 0: /* AC_BE */
f0706e82 1476 default:
e100bb64 1477 queue = 2;
988c0f72 1478 if (acm)
00e96dec 1479 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV		 1480 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1481 uapsd = true;
f0706e82
JB		 1482 break;
1483 }
1484
1485 params.aifs = pos[0] & 0x0f;
1486 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1487 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 1488 params.txop = get_unaligned_le16(pos + 2);
908f8d07 1489 params.acm = acm;
ab13315a
KV		 1490 params.uapsd = uapsd;
1491
bdcbd8e0
JB		 1492 mlme_dbg(sdata,
1493 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1494 queue, aci, acm,
1495 params.aifs, params.cw_min, params.cw_max,
1496 params.txop, params.uapsd);
f6f3def3
EP		 1497 sdata->tx_conf[queue] = params;
1498 if (drv_conf_tx(local, sdata, queue, &params))
bdcbd8e0
JB		 1499 sdata_err(sdata,
1500 "failed to set TX queue parameters for queue %d\n",
1501 queue);
f0706e82 1502 }
e1b3ec1a
SG		 1503
1504 /* enable WMM or activate new settings */
4ced3f74 1505 sdata->vif.bss_conf.qos = true;
7d25745d 1506 return true;
f0706e82
JB		 1507}
1508
925e64c3
SG		 1509static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1510{
1511 lockdep_assert_held(&sdata->local->mtx);
1512
392b9ffb 1513 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
925e64c3
SG		 1514 ieee80211_run_deferred_scan(sdata->local);
1515}
1516
1517static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1518{
1519 mutex_lock(&sdata->local->mtx);
1520 __ieee80211_stop_poll(sdata);
1521 mutex_unlock(&sdata->local->mtx);
1522}
1523
7a5158ef
JB		 1524static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1525 u16 capab, bool erp_valid, u8 erp)
5628221c 1526{
bda3933a 1527 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 1528 u32 changed = 0;
7a5158ef
JB		 1529 bool use_protection;
1530 bool use_short_preamble;
1531 bool use_short_slot;
1532
1533 if (erp_valid) {
1534 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1535 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1536 } else {
1537 use_protection = false;
1538 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1539 }
1540
1541 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
55de908a 1542 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
43d35343 1543 use_short_slot = true;
5628221c 1544
471b3efd 1545 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 1546 bss_conf->use_cts_prot = use_protection;
1547 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 1548 }
7e9ed188 1549
d43c7b37 1550 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 1551 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 1552 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 1553 }
d9430a32 1554
7a5158ef 1555 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 1556 bss_conf->use_short_slot = use_short_slot;
1557 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 1558 }
1559
1560 return changed;
1561}
1562
f698d856 1563static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 1564 struct cfg80211_bss *cbss,
ae5eb026 1565 u32 bss_info_changed)
f0706e82 1566{
0c1ad2ca 1567 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 1568 struct ieee80211_local *local = sdata->local;
68542962 1569 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
d6f2da5b 1570
ae5eb026 1571 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 1572 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
50ae34a2 1573 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 1574
7ccc8bd7 1575 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
59c1ec2b 1576 beacon_loss_count * bss_conf->beacon_int));
7ccc8bd7 1577
0c1ad2ca
JB		 1578 sdata->u.mgd.associated = cbss;
1579 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 1580
17e4ec14
JM		 1581 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1582
488dd7b5 1583 if (sdata->vif.p2p) {
9caf0364 1584 const struct cfg80211_bss_ies *ies;
488dd7b5 1585
9caf0364
JB		 1586 rcu_read_lock();
1587 ies = rcu_dereference(cbss->ies);
1588 if (ies) {
9caf0364
JB		 1589 int ret;
1590
1591 ret = cfg80211_get_p2p_attr(
1592 ies->data, ies->len,
1593 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
67baf663
JD		 1594 (u8 *) &bss_conf->p2p_noa_attr,
1595 sizeof(bss_conf->p2p_noa_attr));
9caf0364 1596 if (ret >= 2) {
67baf663
JD		 1597 sdata->u.mgd.p2p_noa_index =
1598 bss_conf->p2p_noa_attr.index;
9caf0364 1599 bss_info_changed |= BSS_CHANGED_P2P_PS;
9caf0364 1600 }
488dd7b5 1601 }
9caf0364 1602 rcu_read_unlock();
488dd7b5
JB		 1603 }
1604
b291ba11 1605 /* just to be sure */
925e64c3 1606 ieee80211_stop_poll(sdata);
b291ba11 1607
9ac19a90 1608 ieee80211_led_assoc(local, 1);
9306102e 1609
989c6505 1610 if (sdata->u.mgd.have_beacon) {
826262c3
JB		 1611 /*
1612 * If the AP is buggy we may get here with no DTIM period
1613 * known, so assume it's 1 which is the only safe assumption
1614 * in that case, although if the TIM IE is broken powersave
1615 * probably just won't work at all.
1616 */
1617 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
817cee76 1618 bss_conf->beacon_rate = bss->beacon_rate;
989c6505 1619 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
826262c3 1620 } else {
817cee76 1621 bss_conf->beacon_rate = NULL;
e5b900d2 1622 bss_conf->dtim_period = 0;
826262c3 1623 }
e5b900d2 1624
68542962 1625 bss_conf->assoc = 1;
9cef8737 1626
a97c13c3 1627 /* Tell the driver to monitor connection quality (if supported) */
ea086359 1628 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
68542962 1629 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 1630 bss_info_changed |= BSS_CHANGED_CQM;
1631
68542962 1632 /* Enable ARP filtering */
0f19b41e 1633 if (bss_conf->arp_addr_cnt)
68542962 1634 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
68542962 1635
ae5eb026 1636 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 1637
056508dc
JB		 1638 mutex_lock(&local->iflist_mtx);
1639 ieee80211_recalc_ps(local, -1);
1640 mutex_unlock(&local->iflist_mtx);
e0cb686f 1641
04ecd257 1642 ieee80211_recalc_smps(sdata);
ab095877
EP		 1643 ieee80211_recalc_ps_vif(sdata);
1644
9ac19a90 1645 netif_carrier_on(sdata->dev);
f0706e82
JB		 1646}
1647
e69e95db 1648static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
37ad3888
JB		 1649 u16 stype, u16 reason, bool tx,
1650 u8 *frame_buf)
aa458d17 1651{
46900298 1652 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17 1653 struct ieee80211_local *local = sdata->local;
3cc5240b 1654 u32 changed = 0;
aa458d17 1655
8d61ffa5 1656 sdata_assert_lock(sdata);
77fdaa12 1657
37ad3888
JB		 1658 if (WARN_ON_ONCE(tx && !frame_buf))
1659 return;
1660
b291ba11
JB		 1661 if (WARN_ON(!ifmgd->associated))
1662 return;
1663
79543d8e
DS		 1664 ieee80211_stop_poll(sdata);
1665
77fdaa12 1666 ifmgd->associated = NULL;
aa458d17
TW		 1667 netif_carrier_off(sdata->dev);
1668
88bc40e8
EP		 1669 /*
1670 * if we want to get out of ps before disassoc (why?) we have
1671 * to do it before sending disassoc, as otherwise the null-packet
1672 * won't be valid.
1673 */
1674 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1675 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1676 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1677 }
1678 local->ps_sdata = NULL;
1679
ab095877
EP		 1680 /* disable per-vif ps */
1681 ieee80211_recalc_ps_vif(sdata);
1682
f823981e
EP		 1683 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1684 if (tx)
39ecc01d 1685 ieee80211_flush_queues(local, sdata);
f823981e 1686
37ad3888
JB		 1687 /* deauthenticate/disassociate now */
1688 if (tx || frame_buf)
88a9e31c
EP		 1689 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
1690 reason, tx, frame_buf);
37ad3888
JB		 1691
1692 /* flush out frame */
1693 if (tx)
39ecc01d 1694 ieee80211_flush_queues(local, sdata);
37ad3888 1695
88a9e31c
EP		 1696 /* clear bssid only after building the needed mgmt frames */
1697 memset(ifmgd->bssid, 0, ETH_ALEN);
1698
37ad3888 1699 /* remove AP and TDLS peers */
051007d9 1700 sta_info_flush_defer(sdata);
37ad3888
JB		 1701
1702 /* finally reset all BSS / config parameters */
f5e5bf25
TW		 1703 changed |= ieee80211_reset_erp_info(sdata);
1704
f5e5bf25 1705 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 1706 changed |= BSS_CHANGED_ASSOC;
1707 sdata->vif.bss_conf.assoc = false;
f5e5bf25 1708
67baf663
JD		 1709 ifmgd->p2p_noa_index = -1;
1710 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
1711 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
488dd7b5 1712
dd5ecfea 1713 /* on the next assoc, re-program HT/VHT parameters */
ef96a842
BG		 1714 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1715 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
dd5ecfea
JB		 1716 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
1717 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
413ad50a 1718
1ea6f9c0 1719 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
a8302de9 1720
520eb820
KV		 1721 del_timer_sync(&local->dynamic_ps_timer);
1722 cancel_work_sync(&local->dynamic_ps_enable_work);
1723
68542962 1724 /* Disable ARP filtering */
0f19b41e 1725 if (sdata->vif.bss_conf.arp_addr_cnt)
68542962 1726 changed |= BSS_CHANGED_ARP_FILTER;
68542962 1727
3abead59
JB		 1728 sdata->vif.bss_conf.qos = false;
1729 changed |= BSS_CHANGED_QOS;
1730
0aaffa9b
JB		 1731 /* The BSSID (not really interesting) and HT changed */
1732 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 1733 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 1734
3abead59
JB		 1735 /* disassociated - set to defaults now */
1736 ieee80211_set_wmm_default(sdata, false);
1737
b9dcf712
JB		 1738 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1739 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1740 del_timer_sync(&sdata->u.mgd.timer);
1741 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2d9957cc 1742
826262c3 1743 sdata->vif.bss_conf.dtim_period = 0;
817cee76
AB		 1744 sdata->vif.bss_conf.beacon_rate = NULL;
1745
989c6505 1746 ifmgd->have_beacon = false;
826262c3 1747
028e8da0
JB		 1748 ifmgd->flags = 0;
1749 ieee80211_vif_release_channel(sdata);
2475b1cc
MS		 1750
1751 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
aa458d17 1752}
f0706e82 1753
3cf335d5
KV		 1754void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1755 struct ieee80211_hdr *hdr)
1756{
1757 /*
1758 * We can postpone the mgd.timer whenever receiving unicast frames
1759 * from AP because we know that the connection is working both ways
1760 * at that time. But multicast frames (and hence also beacons) must
1761 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 1762 * data idle periods for sending the periodic probe request to the
1763 * AP we're connected to.
3cf335d5 1764 */
b291ba11
JB		 1765 if (is_multicast_ether_addr(hdr->addr1))
1766 return;
1767
be099e82 1768 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 1769}
f0706e82 1770
4e5ff376
FF		 1771static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1772{
1773 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
133d40f9 1774 struct ieee80211_local *local = sdata->local;
4e5ff376 1775
133d40f9 1776 mutex_lock(&local->mtx);
392b9ffb
SG		 1777 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
1778 goto out;
4e5ff376 1779
925e64c3 1780 __ieee80211_stop_poll(sdata);
133d40f9
SG		 1781
1782 mutex_lock(&local->iflist_mtx);
1783 ieee80211_recalc_ps(local, -1);
1784 mutex_unlock(&local->iflist_mtx);
4e5ff376
FF		 1785
1786 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
133d40f9 1787 goto out;
4e5ff376
FF		 1788
1789 /*
1790 * We've received a probe response, but are not sure whether
1791 * we have or will be receiving any beacons or data, so let's
1792 * schedule the timers again, just in case.
1793 */
1794 ieee80211_sta_reset_beacon_monitor(sdata);
1795
1796 mod_timer(&ifmgd->conn_mon_timer,
1797 round_jiffies_up(jiffies +
1798 IEEE80211_CONNECTION_IDLE_TIME));
133d40f9 1799out:
133d40f9 1800 mutex_unlock(&local->mtx);
4e5ff376
FF		 1801}
1802
1803void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
04ac3c0e 1804 struct ieee80211_hdr *hdr, bool ack)
4e5ff376 1805{
75706d0e 1806 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF		 1807 return;
1808
4e5ff376
FF		 1809 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1810 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e 1811 if (ack)
cab1c7fd 1812 ieee80211_sta_reset_conn_monitor(sdata);
04ac3c0e
FF		 1813 else
1814 sdata->u.mgd.nullfunc_failed = true;
4e5ff376 1815 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
cab1c7fd 1816 return;
4e5ff376 1817 }
cab1c7fd
WD		 1818
1819 if (ack)
1820 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF		 1821}
1822
a43abf29
ML		 1823static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1824{
1825 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1826 const u8 *ssid;
f01a067d 1827 u8 *dst = ifmgd->associated->bssid;
180205bd 1828 u8 unicast_limit = max(1, max_probe_tries - 3);
f01a067d
LR		 1829
1830 /*
1831 * Try sending broadcast probe requests for the last three
1832 * probe requests after the first ones failed since some
1833 * buggy APs only support broadcast probe requests.
1834 */
1835 if (ifmgd->probe_send_count >= unicast_limit)
1836 dst = NULL;
a43abf29 1837
4e5ff376
FF		 1838 /*
1839 * When the hardware reports an accurate Tx ACK status, it's
1840 * better to send a nullfunc frame instead of a probe request,
1841 * as it will kick us off the AP quickly if we aren't associated
1842 * anymore. The timeout will be reset if the frame is ACKed by
1843 * the AP.
1844 */
992e68bf
SD		 1845 ifmgd->probe_send_count++;
1846
04ac3c0e
FF		 1847 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1848 ifmgd->nullfunc_failed = false;
4e5ff376 1849 ieee80211_send_nullfunc(sdata->local, sdata, 0);
04ac3c0e 1850 } else {
88c868c4
SG		 1851 int ssid_len;
1852
9caf0364 1853 rcu_read_lock();
4e5ff376 1854 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
88c868c4
SG		 1855 if (WARN_ON_ONCE(ssid == NULL))
1856 ssid_len = 0;
1857 else
1858 ssid_len = ssid[1];
1859
1860 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
1672c0e3 1861 0, (u32) -1, true, 0,
55de908a 1862 ifmgd->associated->channel, false);
9caf0364 1863 rcu_read_unlock();
4e5ff376 1864 }
a43abf29 1865
180205bd 1866 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
8d61ffa5 1867 run_again(sdata, ifmgd->probe_timeout);
f69b9c79 1868 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
39ecc01d 1869 ieee80211_flush_queues(sdata->local, sdata);
a43abf29
ML		 1870}
1871
b291ba11
JB		 1872static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1873 bool beacon)
04de8381 1874{
04de8381 1875 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 1876 bool already = false;
34bfc411 1877
9607e6b6 1878 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 1879 return;
1880
8d61ffa5 1881 sdata_lock(sdata);
77fdaa12
JB		 1882
1883 if (!ifmgd->associated)
1884 goto out;
1885
133d40f9
SG		 1886 mutex_lock(&sdata->local->mtx);
1887
1888 if (sdata->local->tmp_channel || sdata->local->scanning) {
1889 mutex_unlock(&sdata->local->mtx);
1890 goto out;
1891 }
1892
a13fbe54 1893 if (beacon) {
bdcbd8e0 1894 mlme_dbg_ratelimited(sdata,
59c1ec2b
BG		 1895 "detected beacon loss from AP (missed %d beacons) - probing\n",
1896 beacon_loss_count);
bdcbd8e0 1897
a13fbe54
BG		 1898 ieee80211_cqm_rssi_notify(&sdata->vif,
1899 NL80211_CQM_RSSI_BEACON_LOSS_EVENT,
1900 GFP_KERNEL);
1901 }
04de8381 1902
b291ba11
JB		 1903 /*
1904 * The driver/our work has already reported this event or the
1905 * connection monitoring has kicked in and we have already sent
1906 * a probe request. Or maybe the AP died and the driver keeps
1907 * reporting until we disassociate...
1908 *
1909 * In either case we have to ignore the current call to this
1910 * function (except for setting the correct probe reason bit)
1911 * because otherwise we would reset the timer every time and
1912 * never check whether we received a probe response!
1913 */
392b9ffb 1914 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
b291ba11
JB		 1915 already = true;
1916
133d40f9
SG		 1917 mutex_unlock(&sdata->local->mtx);
1918
b291ba11
JB		 1919 if (already)
1920 goto out;
1921
4e751843
JB		 1922 mutex_lock(&sdata->local->iflist_mtx);
1923 ieee80211_recalc_ps(sdata->local, -1);
1924 mutex_unlock(&sdata->local->iflist_mtx);
1925
a43abf29
ML		 1926 ifmgd->probe_send_count = 0;
1927 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12 1928 out:
8d61ffa5 1929 sdata_unlock(sdata);
04de8381
KV		 1930}
1931
a619a4c0
JO		 1932struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
1933 struct ieee80211_vif *vif)
1934{
1935 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1936 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d9b3b28b 1937 struct cfg80211_bss *cbss;
a619a4c0
JO		 1938 struct sk_buff *skb;
1939 const u8 *ssid;
88c868c4 1940 int ssid_len;
a619a4c0
JO		 1941
1942 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1943 return NULL;
1944
8d61ffa5 1945 sdata_assert_lock(sdata);
a619a4c0 1946
d9b3b28b
EP		 1947 if (ifmgd->associated)
1948 cbss = ifmgd->associated;
1949 else if (ifmgd->auth_data)
1950 cbss = ifmgd->auth_data->bss;
1951 else if (ifmgd->assoc_data)
1952 cbss = ifmgd->assoc_data->bss;
1953 else
a619a4c0
JO		 1954 return NULL;
1955
9caf0364 1956 rcu_read_lock();
d9b3b28b 1957 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
88c868c4
SG		 1958 if (WARN_ON_ONCE(ssid == NULL))
1959 ssid_len = 0;
1960 else
1961 ssid_len = ssid[1];
1962
d9b3b28b 1963 skb = ieee80211_build_probe_req(sdata, cbss->bssid,
55de908a 1964 (u32) -1, cbss->channel,
6b77863b 1965 ssid + 2, ssid_len,
85a237fe 1966 NULL, 0, true);
9caf0364 1967 rcu_read_unlock();
a619a4c0
JO		 1968
1969 return skb;
1970}
1971EXPORT_SYMBOL(ieee80211_ap_probereq_get);
1972
eef9e54c 1973static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
1e4dcd01
JO		 1974{
1975 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 1976 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
1e4dcd01 1977
8d61ffa5 1978 sdata_lock(sdata);
1e4dcd01 1979 if (!ifmgd->associated) {
8d61ffa5 1980 sdata_unlock(sdata);
1e4dcd01
JO		 1981 return;
1982 }
1983
37ad3888
JB		 1984 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
1985 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
eef9e54c 1986 true, frame_buf);
882a7c69 1987 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
7578d575 1988 sdata->vif.csa_active = false;
5b36ebd8 1989 ieee80211_wake_queues_by_reason(&sdata->local->hw,
445ea4e8 1990 IEEE80211_MAX_QUEUE_MAP,
5b36ebd8 1991 IEEE80211_QUEUE_STOP_REASON_CSA);
7da7cc1d 1992
6ff57cf8
JB		 1993 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
1994 IEEE80211_DEAUTH_FRAME_LEN);
8d61ffa5 1995 sdata_unlock(sdata);
1e4dcd01
JO		 1996}
1997
cc74c0c7 1998static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 1999{
2000 struct ieee80211_sub_if_data *sdata =
2001 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 2002 u.mgd.beacon_connection_loss_work);
a85e1d55
PS		 2003 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2004 struct sta_info *sta;
2005
2006 if (ifmgd->associated) {
30fa9047 2007 rcu_read_lock();
a85e1d55
PS		 2008 sta = sta_info_get(sdata, ifmgd->bssid);
2009 if (sta)
2010 sta->beacon_loss_count++;
30fa9047 2011 rcu_read_unlock();
a85e1d55 2012 }
b291ba11 2013
682bd38b 2014 if (ifmgd->connection_loss) {
882a7c69
JB		 2015 sdata_info(sdata, "Connection to AP %pM lost\n",
2016 ifmgd->bssid);
eef9e54c 2017 __ieee80211_disconnect(sdata);
882a7c69 2018 } else {
1e4dcd01 2019 ieee80211_mgd_probe_ap(sdata, true);
882a7c69
JB		 2020 }
2021}
2022
2023static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2024{
2025 struct ieee80211_sub_if_data *sdata =
2026 container_of(work, struct ieee80211_sub_if_data,
2027 u.mgd.csa_connection_drop_work);
2028
eef9e54c 2029 __ieee80211_disconnect(sdata);
b291ba11
JB		 2030}
2031
04de8381
KV		 2032void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2033{
2034 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 2035 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 2036
b5878a2d
JB		 2037 trace_api_beacon_loss(sdata);
2038
682bd38b 2039 sdata->u.mgd.connection_loss = false;
1e4dcd01 2040 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 2041}
2042EXPORT_SYMBOL(ieee80211_beacon_loss);
2043
1e4dcd01
JO		 2044void ieee80211_connection_loss(struct ieee80211_vif *vif)
2045{
2046 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2047 struct ieee80211_hw *hw = &sdata->local->hw;
2048
b5878a2d
JB		 2049 trace_api_connection_loss(sdata);
2050
682bd38b 2051 sdata->u.mgd.connection_loss = true;
1e4dcd01
JO		 2052 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2053}
2054EXPORT_SYMBOL(ieee80211_connection_loss);
2055
2056
66e67e41
JB		 2057static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2058 bool assoc)
2059{
2060 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2061
8d61ffa5 2062 sdata_assert_lock(sdata);
66e67e41 2063
66e67e41
JB		 2064 if (!assoc) {
2065 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2066
2067 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2068 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
028e8da0 2069 sdata->u.mgd.flags = 0;
55de908a 2070 ieee80211_vif_release_channel(sdata);
66e67e41
JB		 2071 }
2072
5b112d3d 2073 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
66e67e41
JB		 2074 kfree(auth_data);
2075 sdata->u.mgd.auth_data = NULL;
2076}
2077
2078static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2079 struct ieee80211_mgmt *mgmt, size_t len)
2080{
1672c0e3 2081 struct ieee80211_local *local = sdata->local;
66e67e41
JB		 2082 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2083 u8 *pos;
2084 struct ieee802_11_elems elems;
1672c0e3 2085 u32 tx_flags = 0;
66e67e41
JB		 2086
2087 pos = mgmt->u.auth.variable;
b2e506bf 2088 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
66e67e41
JB		 2089 if (!elems.challenge)
2090 return;
2091 auth_data->expected_transaction = 4;
a1845fc7 2092 drv_mgd_prepare_tx(sdata->local, sdata);
1672c0e3
JB		 2093 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2094 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2095 IEEE80211_TX_INTFL_MLME_CONN_TX;
700e8ea6 2096 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
66e67e41
JB		 2097 elems.challenge - 2, elems.challenge_len + 2,
2098 auth_data->bss->bssid, auth_data->bss->bssid,
2099 auth_data->key, auth_data->key_len,
1672c0e3 2100 auth_data->key_idx, tx_flags);
66e67e41
JB		 2101}
2102
8d61ffa5
JB		 2103static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2104 struct ieee80211_mgmt *mgmt, size_t len)
66e67e41
JB		 2105{
2106 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2107 u8 bssid[ETH_ALEN];
2108 u16 auth_alg, auth_transaction, status_code;
2109 struct sta_info *sta;
2110
8d61ffa5 2111 sdata_assert_lock(sdata);
66e67e41
JB		 2112
2113 if (len < 24 + 6)
8d61ffa5 2114 return;
66e67e41
JB		 2115
2116 if (!ifmgd->auth_data || ifmgd->auth_data->done)
8d61ffa5 2117 return;
66e67e41
JB		 2118
2119 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2120
b203ca39 2121 if (!ether_addr_equal(bssid, mgmt->bssid))
8d61ffa5 2122 return;
66e67e41
JB		 2123
2124 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2125 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2126 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2127
2128 if (auth_alg != ifmgd->auth_data->algorithm ||
0f4126e8
JM		 2129 auth_transaction != ifmgd->auth_data->expected_transaction) {
2130 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2131 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2132 auth_transaction,
2133 ifmgd->auth_data->expected_transaction);
8d61ffa5 2134 return;
0f4126e8 2135 }
66e67e41
JB		 2136
2137 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2138 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2139 mgmt->sa, status_code);
dac211ec 2140 ieee80211_destroy_auth_data(sdata, false);
6ff57cf8 2141 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
8d61ffa5 2142 return;
66e67e41
JB		 2143 }
2144
2145 switch (ifmgd->auth_data->algorithm) {
2146 case WLAN_AUTH_OPEN:
2147 case WLAN_AUTH_LEAP:
2148 case WLAN_AUTH_FT:
6b8ece3a 2149 case WLAN_AUTH_SAE:
66e67e41
JB		 2150 break;
2151 case WLAN_AUTH_SHARED_KEY:
2152 if (ifmgd->auth_data->expected_transaction != 4) {
2153 ieee80211_auth_challenge(sdata, mgmt, len);
2154 /* need another frame */
8d61ffa5 2155 return;
66e67e41
JB		 2156 }
2157 break;
2158 default:
2159 WARN_ONCE(1, "invalid auth alg %d",
2160 ifmgd->auth_data->algorithm);
8d61ffa5 2161 return;
66e67e41
JB		 2162 }
2163
bdcbd8e0 2164 sdata_info(sdata, "authenticated\n");
66e67e41
JB		 2165 ifmgd->auth_data->done = true;
2166 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
89afe614 2167 ifmgd->auth_data->timeout_started = true;
8d61ffa5 2168 run_again(sdata, ifmgd->auth_data->timeout);
66e67e41 2169
6b8ece3a
JM		 2170 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2171 ifmgd->auth_data->expected_transaction != 2) {
2172 /*
2173 * Report auth frame to user space for processing since another
2174 * round of Authentication frames is still needed.
2175 */
6ff57cf8 2176 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
8d61ffa5 2177 return;
6b8ece3a
JM		 2178 }
2179
66e67e41
JB		 2180 /* move station state to auth */
2181 mutex_lock(&sdata->local->sta_mtx);
2182 sta = sta_info_get(sdata, bssid);
2183 if (!sta) {
2184 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2185 goto out_err;
2186 }
2187 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
bdcbd8e0 2188 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
66e67e41
JB		 2189 goto out_err;
2190 }
2191 mutex_unlock(&sdata->local->sta_mtx);
2192
6ff57cf8 2193 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
8d61ffa5 2194 return;
66e67e41
JB		 2195 out_err:
2196 mutex_unlock(&sdata->local->sta_mtx);
2197 /* ignore frame -- wait for timeout */
66e67e41
JB		 2198}
2199
2200
8d61ffa5
JB		 2201static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2202 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2203{
46900298 2204 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 2205 const u8 *bssid = NULL;
f0706e82
JB		 2206 u16 reason_code;
2207
8d61ffa5 2208 sdata_assert_lock(sdata);
66e67e41 2209
f4ea83dd 2210 if (len < 24 + 2)
8d61ffa5 2211 return;
f0706e82 2212
66e67e41 2213 if (!ifmgd->associated ||
b203ca39 2214 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
8d61ffa5 2215 return;
77fdaa12 2216
0c1ad2ca 2217 bssid = ifmgd->associated->bssid;
f0706e82
JB		 2218
2219 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2220
bdcbd8e0
JB		 2221 sdata_info(sdata, "deauthenticated from %pM (Reason: %u)\n",
2222 bssid, reason_code);
77fdaa12 2223
37ad3888
JB		 2224 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2225
6ff57cf8 2226 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
f0706e82
JB		 2227}
2228
2229
8d61ffa5
JB		 2230static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2231 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2232{
46900298 2233 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 2234 u16 reason_code;
2235
8d61ffa5 2236 sdata_assert_lock(sdata);
77fdaa12 2237
66e67e41 2238 if (len < 24 + 2)
8d61ffa5 2239 return;
77fdaa12 2240
66e67e41 2241 if (!ifmgd->associated ||
b203ca39 2242 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
8d61ffa5 2243 return;
f0706e82
JB		 2244
2245 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2246
bdcbd8e0
JB		 2247 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2248 mgmt->sa, reason_code);
f0706e82 2249
37ad3888
JB		 2250 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2251
6ff57cf8 2252 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
f0706e82
JB		 2253}
2254
c74d084f
CL		 2255static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2256 u8 *supp_rates, unsigned int supp_rates_len,
2257 u32 *rates, u32 *basic_rates,
2258 bool *have_higher_than_11mbit,
2103dec1
SW		 2259 int *min_rate, int *min_rate_index,
2260 int shift, u32 rate_flags)
c74d084f
CL		 2261{
2262 int i, j;
2263
2264 for (i = 0; i < supp_rates_len; i++) {
2103dec1 2265 int rate = supp_rates[i] & 0x7f;
c74d084f
CL		 2266 bool is_basic = !!(supp_rates[i] & 0x80);
2267
2103dec1 2268 if ((rate * 5 * (1 << shift)) > 110)
c74d084f
CL		 2269 *have_higher_than_11mbit = true;
2270
2271 /*
2272 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2273 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2274 *
2275 * Note: Even through the membership selector and the basic
2276 * rate flag share the same bit, they are not exactly
2277 * the same.
2278 */
2279 if (!!(supp_rates[i] & 0x80) &&
2280 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2281 continue;
2282
2283 for (j = 0; j < sband->n_bitrates; j++) {
2103dec1
SW		 2284 struct ieee80211_rate *br;
2285 int brate;
2286
2287 br = &sband->bitrates[j];
2288 if ((rate_flags & br->flags) != rate_flags)
2289 continue;
2290
2291 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2292 if (brate == rate) {
c74d084f
CL		 2293 *rates |= BIT(j);
2294 if (is_basic)
2295 *basic_rates |= BIT(j);
2103dec1
SW		 2296 if ((rate * 5) < *min_rate) {
2297 *min_rate = rate * 5;
c74d084f
CL		 2298 *min_rate_index = j;
2299 }
2300 break;
2301 }
2302 }
2303 }
2304}
f0706e82 2305
66e67e41
JB		 2306static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2307 bool assoc)
2308{
2309 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2310
8d61ffa5 2311 sdata_assert_lock(sdata);
66e67e41 2312
66e67e41
JB		 2313 if (!assoc) {
2314 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2315
2316 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2317 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
028e8da0 2318 sdata->u.mgd.flags = 0;
55de908a 2319 ieee80211_vif_release_channel(sdata);
66e67e41
JB		 2320 }
2321
2322 kfree(assoc_data);
2323 sdata->u.mgd.assoc_data = NULL;
2324}
2325
2326static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2327 struct cfg80211_bss *cbss,
af6b6374 2328 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2329{
46900298 2330 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 2331 struct ieee80211_local *local = sdata->local;
8318d78a 2332 struct ieee80211_supported_band *sband;
f0706e82 2333 struct sta_info *sta;
af6b6374 2334 u8 *pos;
af6b6374 2335 u16 capab_info, aid;
f0706e82 2336 struct ieee802_11_elems elems;
bda3933a 2337 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
35d865af
JB		 2338 const struct cfg80211_bss_ies *bss_ies = NULL;
2339 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
ae5eb026 2340 u32 changed = 0;
c74d084f 2341 int err;
35d865af 2342 bool ret;
f0706e82 2343
af6b6374 2344 /* AssocResp and ReassocResp have identical structure */
f0706e82 2345
f0706e82 2346 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 2347 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 2348
1dd84aa2 2349 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
bdcbd8e0
JB		 2350 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2351 aid);
1dd84aa2
JB		 2352 aid &= ~(BIT(15) | BIT(14));
2353
05cb9108
JB		 2354 ifmgd->broken_ap = false;
2355
2356 if (aid == 0 || aid > IEEE80211_MAX_AID) {
bdcbd8e0
JB		 2357 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2358 aid);
05cb9108
JB		 2359 aid = 0;
2360 ifmgd->broken_ap = true;
2361 }
2362
af6b6374 2363 pos = mgmt->u.assoc_resp.variable;
b2e506bf 2364 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
af6b6374 2365
f0706e82 2366 if (!elems.supp_rates) {
bdcbd8e0 2367 sdata_info(sdata, "no SuppRates element in AssocResp\n");
af6b6374 2368 return false;
f0706e82
JB		 2369 }
2370
46900298 2371 ifmgd->aid = aid;
f0706e82 2372
35d865af
JB		 2373 /*
2374 * Some APs are erroneously not including some information in their
2375 * (re)association response frames. Try to recover by using the data
2376 * from the beacon or probe response. This seems to afflict mobile
2377 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2378 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2379 */
2380 if ((assoc_data->wmm && !elems.wmm_param) ||
2381 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2382 (!elems.ht_cap_elem || !elems.ht_operation)) ||
2383 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2384 (!elems.vht_cap_elem || !elems.vht_operation))) {
2385 const struct cfg80211_bss_ies *ies;
2386 struct ieee802_11_elems bss_elems;
2387
2388 rcu_read_lock();
2389 ies = rcu_dereference(cbss->ies);
2390 if (ies)
2391 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2392 GFP_ATOMIC);
2393 rcu_read_unlock();
2394 if (!bss_ies)
2395 return false;
2396
2397 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2398 false, &bss_elems);
2399 if (assoc_data->wmm &&
2400 !elems.wmm_param && bss_elems.wmm_param) {
2401 elems.wmm_param = bss_elems.wmm_param;
2402 sdata_info(sdata,
2403 "AP bug: WMM param missing from AssocResp\n");
2404 }
2405
2406 /*
2407 * Also check if we requested HT/VHT, otherwise the AP doesn't
2408 * have to include the IEs in the (re)association response.
2409 */
2410 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2411 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2412 elems.ht_cap_elem = bss_elems.ht_cap_elem;
2413 sdata_info(sdata,
2414 "AP bug: HT capability missing from AssocResp\n");
2415 }
2416 if (!elems.ht_operation && bss_elems.ht_operation &&
2417 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2418 elems.ht_operation = bss_elems.ht_operation;
2419 sdata_info(sdata,
2420 "AP bug: HT operation missing from AssocResp\n");
2421 }
2422 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2423 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2424 elems.vht_cap_elem = bss_elems.vht_cap_elem;
2425 sdata_info(sdata,
2426 "AP bug: VHT capa missing from AssocResp\n");
2427 }
2428 if (!elems.vht_operation && bss_elems.vht_operation &&
2429 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2430 elems.vht_operation = bss_elems.vht_operation;
2431 sdata_info(sdata,
2432 "AP bug: VHT operation missing from AssocResp\n");
2433 }
2434 }
2435
30eb1dc2
JB		 2436 /*
2437 * We previously checked these in the beacon/probe response, so
2438 * they should be present here. This is just a safety net.
2439 */
2440 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2441 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2442 sdata_info(sdata,
35d865af
JB		 2443 "HT AP is missing WMM params or HT capability/operation\n");
2444 ret = false;
2445 goto out;
30eb1dc2
JB		 2446 }
2447
2448 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2449 (!elems.vht_cap_elem || !elems.vht_operation)) {
2450 sdata_info(sdata,
35d865af
JB		 2451 "VHT AP is missing VHT capability/operation\n");
2452 ret = false;
2453 goto out;
30eb1dc2
JB		 2454 }
2455
2a33bee2
GE		 2456 mutex_lock(&sdata->local->sta_mtx);
2457 /*
2458 * station info was already allocated and inserted before
2459 * the association and should be available to us
2460 */
7852e361 2461 sta = sta_info_get(sdata, cbss->bssid);
2a33bee2
GE		 2462 if (WARN_ON(!sta)) {
2463 mutex_unlock(&sdata->local->sta_mtx);
35d865af
JB		 2464 ret = false;
2465 goto out;
77fdaa12 2466 }
05e5e883 2467
55de908a 2468 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
f709fc69 2469
30eb1dc2 2470 /* Set up internal HT/VHT capabilities */
a8243b72 2471 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
ef96a842 2472 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
e1a0c6b3 2473 elems.ht_cap_elem, sta);
64f68e5d 2474
818255ea
MP		 2475 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2476 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
4a34215e 2477 elems.vht_cap_elem, sta);
818255ea 2478
30eb1dc2
JB		 2479 /*
2480 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
2481 * in their association response, so ignore that data for our own
2482 * configuration. If it changed since the last beacon, we'll get the
2483 * next beacon and update then.
2484 */
1128958d 2485
bee7f586
JB		 2486 /*
2487 * If an operating mode notification IE is present, override the
2488 * NSS calculation (that would be done in rate_control_rate_init())
2489 * and use the # of streams from that element.
2490 */
2491 if (elems.opmode_notif &&
2492 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
2493 u8 nss;
2494
2495 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
2496 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
2497 nss += 1;
2498 sta->sta.rx_nss = nss;
2499 }
2500
4b7679a5 2501 rate_control_rate_init(sta);
f0706e82 2502
46900298 2503 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
c2c98fde 2504 set_sta_flag(sta, WLAN_STA_MFP);
5394af4d 2505
ddf4ac53 2506 if (elems.wmm_param)
c2c98fde 2507 set_sta_flag(sta, WLAN_STA_WME);
ddf4ac53 2508
3e4d40fa 2509 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
c8987876
JB		 2510 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2511 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2512 if (err) {
bdcbd8e0
JB		 2513 sdata_info(sdata,
2514 "failed to move station %pM to desired state\n",
2515 sta->sta.addr);
c8987876
JB		 2516 WARN_ON(__sta_info_destroy(sta));
2517 mutex_unlock(&sdata->local->sta_mtx);
35d865af
JB		 2518 ret = false;
2519 goto out;
c8987876
JB		 2520 }
2521
7852e361 2522 mutex_unlock(&sdata->local->sta_mtx);
ddf4ac53 2523
f2176d72
JO		 2524 /*
2525 * Always handle WMM once after association regardless
2526 * of the first value the AP uses. Setting -1 here has
2527 * that effect because the AP values is an unsigned
2528 * 4-bit value.
2529 */
2530 ifmgd->wmm_last_param_set = -1;
2531
095d81ce 2532 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && elems.wmm_param)
4ced3f74 2533 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 2534 elems.wmm_param_len);
aa837e1d 2535 else
3abead59
JB		 2536 ieee80211_set_wmm_default(sdata, false);
2537 changed |= BSS_CHANGED_QOS;
f0706e82 2538
60f8b39c
JB		 2539 /* set AID and assoc capability,
2540 * ieee80211_set_associated() will tell the driver */
2541 bss_conf->aid = aid;
2542 bss_conf->assoc_capability = capab_info;
0c1ad2ca 2543 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 2544
d524215f
FF		 2545 /*
2546 * If we're using 4-addr mode, let the AP know that we're
2547 * doing so, so that it can create the STA VLAN on its side
2548 */
2549 if (ifmgd->use_4addr)
2550 ieee80211_send_4addr_nullfunc(local, sdata);
2551
15b7b062 2552 /*
b291ba11
JB		 2553 * Start timer to probe the connection to the AP now.
2554 * Also start the timer that will detect beacon loss.
15b7b062 2555 */
b291ba11 2556 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 2557 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 2558
35d865af
JB		 2559 ret = true;
2560 out:
2561 kfree(bss_ies);
2562 return ret;
f0706e82
JB		 2563}
2564
8d61ffa5
JB		 2565static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2566 struct ieee80211_mgmt *mgmt,
2567 size_t len)
66e67e41
JB		 2568{
2569 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2570 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2571 u16 capab_info, status_code, aid;
2572 struct ieee802_11_elems elems;
2573 u8 *pos;
2574 bool reassoc;
8d61ffa5 2575 struct cfg80211_bss *bss;
66e67e41 2576
8d61ffa5 2577 sdata_assert_lock(sdata);
66e67e41
JB		 2578
2579 if (!assoc_data)
8d61ffa5 2580 return;
b203ca39 2581 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
8d61ffa5 2582 return;
66e67e41
JB		 2583
2584 /*
2585 * AssocResp and ReassocResp have identical structure, so process both
2586 * of them in this function.
2587 */
2588
2589 if (len < 24 + 6)
8d61ffa5 2590 return;
66e67e41
JB		 2591
2592 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2593 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2594 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2595 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2596
bdcbd8e0
JB		 2597 sdata_info(sdata,
2598 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2599 reassoc ? "Rea" : "A", mgmt->sa,
2600 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
66e67e41
JB		 2601
2602 pos = mgmt->u.assoc_resp.variable;
b2e506bf 2603 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
66e67e41
JB		 2604
2605 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
79ba1d89
JB		 2606 elems.timeout_int &&
2607 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
66e67e41 2608 u32 tu, ms;
79ba1d89 2609 tu = le32_to_cpu(elems.timeout_int->value);
66e67e41 2610 ms = tu * 1024 / 1000;
bdcbd8e0
JB		 2611 sdata_info(sdata,
2612 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2613 mgmt->sa, tu, ms);
66e67e41 2614 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
89afe614 2615 assoc_data->timeout_started = true;
66e67e41 2616 if (ms > IEEE80211_ASSOC_TIMEOUT)
8d61ffa5
JB		 2617 run_again(sdata, assoc_data->timeout);
2618 return;
66e67e41
JB		 2619 }
2620
8d61ffa5 2621 bss = assoc_data->bss;
66e67e41
JB		 2622
2623 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2624 sdata_info(sdata, "%pM denied association (code=%d)\n",
2625 mgmt->sa, status_code);
66e67e41
JB		 2626 ieee80211_destroy_assoc_data(sdata, false);
2627 } else {
8d61ffa5 2628 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
66e67e41 2629 /* oops -- internal error -- send timeout for now */
10a9109f 2630 ieee80211_destroy_assoc_data(sdata, false);
959867fa 2631 cfg80211_assoc_timeout(sdata->dev, bss);
8d61ffa5 2632 return;
66e67e41 2633 }
635d999f 2634 sdata_info(sdata, "associated\n");
79ebfb85
JB		 2635
2636 /*
2637 * destroy assoc_data afterwards, as otherwise an idle
2638 * recalc after assoc_data is NULL but before associated
2639 * is set can cause the interface to go idle
2640 */
2641 ieee80211_destroy_assoc_data(sdata, true);
66e67e41
JB		 2642 }
2643
6ff57cf8 2644 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len);
66e67e41 2645}
8e3c1b77 2646
98c8fccf 2647static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
8e3c1b77 2648 struct ieee80211_mgmt *mgmt, size_t len,
98c8fccf 2649 struct ieee80211_rx_status *rx_status,
d45c4172 2650 struct ieee802_11_elems *elems)
98c8fccf
JB		 2651{
2652 struct ieee80211_local *local = sdata->local;
2653 int freq;
c2b13452 2654 struct ieee80211_bss *bss;
98c8fccf 2655 struct ieee80211_channel *channel;
56007a02 2656
8d61ffa5 2657 sdata_assert_lock(sdata);
b4f286a1 2658
1cd8e88e 2659 if (elems->ds_params)
59eb21a6
BR		 2660 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
2661 rx_status->band);
98c8fccf
JB		 2662 else
2663 freq = rx_status->freq;
2664
2665 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2666
2667 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2668 return;
2669
98c8fccf 2670 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
d45c4172 2671 channel);
817cee76 2672 if (bss) {
77fdaa12 2673 ieee80211_rx_bss_put(local, bss);
817cee76
AB		 2674 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
2675 }
f0706e82
JB		 2676}
2677
2678
f698d856 2679static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 2680 struct sk_buff *skb)
f0706e82 2681{
af6b6374 2682 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 2683 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 2684 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2685 size_t baselen, len = skb->len;
ae6a44e3
EK		 2686 struct ieee802_11_elems elems;
2687
15b7b062
KV		 2688 ifmgd = &sdata->u.mgd;
2689
8d61ffa5 2690 sdata_assert_lock(sdata);
77fdaa12 2691
b203ca39 2692 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
8e7cdbb6
TW		 2693 return; /* ignore ProbeResp to foreign address */
2694
ae6a44e3
EK		 2695 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2696 if (baselen > len)
2697 return;
2698
2699 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
b2e506bf 2700 false, &elems);
ae6a44e3 2701
d45c4172 2702 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
9859b81e 2703
77fdaa12 2704 if (ifmgd->associated &&
b203ca39 2705 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
4e5ff376 2706 ieee80211_reset_ap_probe(sdata);
66e67e41
JB		 2707
2708 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
b203ca39 2709 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
66e67e41 2710 /* got probe response, continue with auth */
bdcbd8e0 2711 sdata_info(sdata, "direct probe responded\n");
66e67e41
JB		 2712 ifmgd->auth_data->tries = 0;
2713 ifmgd->auth_data->timeout = jiffies;
89afe614 2714 ifmgd->auth_data->timeout_started = true;
8d61ffa5 2715 run_again(sdata, ifmgd->auth_data->timeout);
66e67e41 2716 }
f0706e82
JB		 2717}
2718
d91f36db
JB		 2719/*
2720 * This is the canonical list of information elements we care about,
2721 * the filter code also gives us all changes to the Microsoft OUI
2722 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2723 *
2724 * We implement beacon filtering in software since that means we can
2725 * avoid processing the frame here and in cfg80211, and userspace
2726 * will not be able to tell whether the hardware supports it or not.
2727 *
2728 * XXX: This list needs to be dynamic -- userspace needs to be able to
2729 * add items it requires. It also needs to be able to tell us to
2730 * look out for other vendor IEs.
2731 */
2732static const u64 care_about_ies =
1d4df3a5
JB		 2733 (1ULL << WLAN_EID_COUNTRY) |
2734 (1ULL << WLAN_EID_ERP_INFO) |
2735 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2736 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2737 (1ULL << WLAN_EID_HT_CAPABILITY) |
074d46d1 2738 (1ULL << WLAN_EID_HT_OPERATION);
d91f36db 2739
8d61ffa5
JB		 2740static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
2741 struct ieee80211_mgmt *mgmt, size_t len,
2742 struct ieee80211_rx_status *rx_status)
f0706e82 2743{
d91f36db 2744 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 2745 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 2746 size_t baselen;
2747 struct ieee802_11_elems elems;
f698d856 2748 struct ieee80211_local *local = sdata->local;
55de908a
JB		 2749 struct ieee80211_chanctx_conf *chanctx_conf;
2750 struct ieee80211_channel *chan;
bee7f586 2751 struct sta_info *sta;
471b3efd 2752 u32 changed = 0;
f87ad637 2753 bool erp_valid;
7a5158ef 2754 u8 erp_value = 0;
d91f36db 2755 u32 ncrc;
77fdaa12 2756 u8 *bssid;
8d61ffa5 2757 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
77fdaa12 2758
8d61ffa5 2759 sdata_assert_lock(sdata);
f0706e82 2760
ae6a44e3
EK		 2761 /* Process beacon from the current BSS */
2762 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2763 if (baselen > len)
8d61ffa5 2764 return;
ae6a44e3 2765
55de908a
JB		 2766 rcu_read_lock();
2767 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2768 if (!chanctx_conf) {
2769 rcu_read_unlock();
8d61ffa5 2770 return;
55de908a
JB		 2771 }
2772
4bf88530 2773 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
55de908a 2774 rcu_read_unlock();
8d61ffa5 2775 return;
55de908a 2776 }
4bf88530 2777 chan = chanctx_conf->def.chan;
55de908a 2778 rcu_read_unlock();
f0706e82 2779
c65dd147 2780 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
b203ca39 2781 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
66e67e41 2782 ieee802_11_parse_elems(mgmt->u.beacon.variable,
b2e506bf 2783 len - baselen, false, &elems);
77fdaa12 2784
d45c4172 2785 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
482a9c74
AB		 2786 if (elems.tim && !elems.parse_error) {
2787 const struct ieee80211_tim_ie *tim_ie = elems.tim;
2788 ifmgd->dtim_period = tim_ie->dtim_period;
2789 }
989c6505 2790 ifmgd->have_beacon = true;
c65dd147 2791 ifmgd->assoc_data->need_beacon = false;
ef429dad
JB		 2792 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
2793 sdata->vif.bss_conf.sync_tsf =
2794 le64_to_cpu(mgmt->u.beacon.timestamp);
2795 sdata->vif.bss_conf.sync_device_ts =
2796 rx_status->device_timestamp;
2797 if (elems.tim)
2798 sdata->vif.bss_conf.sync_dtim_count =
2799 elems.tim->dtim_count;
2800 else
2801 sdata->vif.bss_conf.sync_dtim_count = 0;
2802 }
66e67e41
JB		 2803 /* continue assoc process */
2804 ifmgd->assoc_data->timeout = jiffies;
89afe614 2805 ifmgd->assoc_data->timeout_started = true;
8d61ffa5
JB		 2806 run_again(sdata, ifmgd->assoc_data->timeout);
2807 return;
66e67e41 2808 }
77fdaa12 2809
66e67e41 2810 if (!ifmgd->associated ||
b203ca39 2811 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
8d61ffa5 2812 return;
66e67e41 2813 bssid = ifmgd->associated->bssid;
f0706e82 2814
17e4ec14
JM		 2815 /* Track average RSSI from the Beacon frames of the current AP */
2816 ifmgd->last_beacon_signal = rx_status->signal;
2817 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
2818 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3ba06c6f 2819 ifmgd->ave_beacon_signal = rx_status->signal * 16;
17e4ec14 2820 ifmgd->last_cqm_event_signal = 0;
391a200a 2821 ifmgd->count_beacon_signal = 1;
615f7b9b 2822 ifmgd->last_ave_beacon_signal = 0;
17e4ec14
JM		 2823 } else {
2824 ifmgd->ave_beacon_signal =
2825 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
2826 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
2827 ifmgd->ave_beacon_signal) / 16;
391a200a 2828 ifmgd->count_beacon_signal++;
17e4ec14 2829 }
615f7b9b
MV		 2830
2831 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
2832 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
2833 int sig = ifmgd->ave_beacon_signal;
2834 int last_sig = ifmgd->last_ave_beacon_signal;
2835
2836 /*
2837 * if signal crosses either of the boundaries, invoke callback
2838 * with appropriate parameters
2839 */
2840 if (sig > ifmgd->rssi_max_thold &&
2841 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
2842 ifmgd->last_ave_beacon_signal = sig;
887da917 2843 drv_rssi_callback(local, sdata, RSSI_EVENT_HIGH);
615f7b9b
MV		 2844 } else if (sig < ifmgd->rssi_min_thold &&
2845 (last_sig >= ifmgd->rssi_max_thold ||
2846 last_sig == 0)) {
2847 ifmgd->last_ave_beacon_signal = sig;
887da917 2848 drv_rssi_callback(local, sdata, RSSI_EVENT_LOW);
615f7b9b
MV		 2849 }
2850 }
2851
17e4ec14 2852 if (bss_conf->cqm_rssi_thold &&
391a200a 2853 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
ea086359 2854 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
17e4ec14
JM		 2855 int sig = ifmgd->ave_beacon_signal / 16;
2856 int last_event = ifmgd->last_cqm_event_signal;
2857 int thold = bss_conf->cqm_rssi_thold;
2858 int hyst = bss_conf->cqm_rssi_hyst;
2859 if (sig < thold &&
2860 (last_event == 0 || sig < last_event - hyst)) {
2861 ifmgd->last_cqm_event_signal = sig;
2862 ieee80211_cqm_rssi_notify(
2863 &sdata->vif,
2864 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
2865 GFP_KERNEL);
2866 } else if (sig > thold &&
2867 (last_event == 0 || sig > last_event + hyst)) {
2868 ifmgd->last_cqm_event_signal = sig;
2869 ieee80211_cqm_rssi_notify(
2870 &sdata->vif,
2871 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
2872 GFP_KERNEL);
2873 }
2874 }
2875
392b9ffb 2876 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
bdcbd8e0 2877 mlme_dbg_ratelimited(sdata,
112c31f0 2878 "cancelling AP probe due to a received beacon\n");
392b9ffb 2879 ieee80211_reset_ap_probe(sdata);
92778180
JM		 2880 }
2881
b291ba11
JB		 2882 /*
2883 * Push the beacon loss detection into the future since
2884 * we are processing a beacon from the AP just now.
2885 */
d3a910a8 2886 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 2887
d91f36db
JB		 2888 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
2889 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
b2e506bf 2890 len - baselen, false, &elems,
d91f36db
JB		 2891 care_about_ies, ncrc);
2892
25c9c875 2893 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
f87ad637
RR		 2894 bool directed_tim = ieee80211_check_tim(elems.tim,
2895 elems.tim_len,
2896 ifmgd->aid);
1fb3606b 2897 if (directed_tim) {
572e0012 2898 if (local->hw.conf.dynamic_ps_timeout > 0) {
70b12f26
RW		 2899 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2900 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2901 ieee80211_hw_config(local,
2902 IEEE80211_CONF_CHANGE_PS);
2903 }
572e0012 2904 ieee80211_send_nullfunc(local, sdata, 0);
6f0756a3 2905 } else if (!local->pspolling && sdata->u.mgd.powersave) {
572e0012
KV		 2906 local->pspolling = true;
2907
2908 /*
2909 * Here is assumed that the driver will be
2910 * able to send ps-poll frame and receive a
2911 * response even though power save mode is
2912 * enabled, but some drivers might require
2913 * to disable power save here. This needs
2914 * to be investigated.
2915 */
2916 ieee80211_send_pspoll(local, sdata);
2917 }
a97b77b9
VN		 2918 }
2919 }
7a5158ef 2920
488dd7b5 2921 if (sdata->vif.p2p) {
67baf663 2922 struct ieee80211_p2p_noa_attr noa = {};
488dd7b5
JB		 2923 int ret;
2924
2925 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
2926 len - baselen,
2927 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
934457ee 2928 (u8 *) &noa, sizeof(noa));
67baf663
JD		 2929 if (ret >= 2) {
2930 if (sdata->u.mgd.p2p_noa_index != noa.index) {
2931 /* valid noa_attr and index changed */
2932 sdata->u.mgd.p2p_noa_index = noa.index;
2933 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
2934 changed |= BSS_CHANGED_P2P_PS;
2935 /*
2936 * make sure we update all information, the CRC
2937 * mechanism doesn't look at P2P attributes.
2938 */
2939 ifmgd->beacon_crc_valid = false;
2940 }
2941 } else if (sdata->u.mgd.p2p_noa_index != -1) {
2942 /* noa_attr not found and we had valid noa_attr before */
2943 sdata->u.mgd.p2p_noa_index = -1;
2944 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
488dd7b5 2945 changed |= BSS_CHANGED_P2P_PS;
488dd7b5
JB		 2946 ifmgd->beacon_crc_valid = false;
2947 }
2948 }
2949
d8ec4433 2950 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
8d61ffa5 2951 return;
30196673 2952 ifmgd->beacon_crc = ncrc;
d8ec4433 2953 ifmgd->beacon_crc_valid = true;
30196673 2954
d45c4172 2955 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
7d25745d 2956
d70b7616
JB		 2957 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
2958 &elems, true);
2959
095d81ce
JB		 2960 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
2961 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
7d25745d
JB		 2962 elems.wmm_param_len))
2963 changed |= BSS_CHANGED_QOS;
2964
c65dd147
EG		 2965 /*
2966 * If we haven't had a beacon before, tell the driver about the
ef429dad 2967 * DTIM period (and beacon timing if desired) now.
c65dd147 2968 */
989c6505 2969 if (!ifmgd->have_beacon) {
c65dd147
EG		 2970 /* a few bogus AP send dtim_period = 0 or no TIM IE */
2971 if (elems.tim)
2972 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
2973 else
2974 bss_conf->dtim_period = 1;
ef429dad
JB		 2975
2976 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
2977 sdata->vif.bss_conf.sync_tsf =
2978 le64_to_cpu(mgmt->u.beacon.timestamp);
2979 sdata->vif.bss_conf.sync_device_ts =
2980 rx_status->device_timestamp;
2981 if (elems.tim)
2982 sdata->vif.bss_conf.sync_dtim_count =
2983 elems.tim->dtim_count;
2984 else
2985 sdata->vif.bss_conf.sync_dtim_count = 0;
2986 }
2987
989c6505
AB		 2988 changed |= BSS_CHANGED_BEACON_INFO;
2989 ifmgd->have_beacon = true;
482a9c74
AB		 2990
2991 mutex_lock(&local->iflist_mtx);
2992 ieee80211_recalc_ps(local, -1);
2993 mutex_unlock(&local->iflist_mtx);
2994
ce857888 2995 ieee80211_recalc_ps_vif(sdata);
c65dd147
EG		 2996 }
2997
1946bed9 2998 if (elems.erp_info) {
7a5158ef
JB		 2999 erp_valid = true;
3000 erp_value = elems.erp_info[0];
3001 } else {
3002 erp_valid = false;
50c4afb9 3003 }
7a5158ef
JB		 3004 changed |= ieee80211_handle_bss_capability(sdata,
3005 le16_to_cpu(mgmt->u.beacon.capab_info),
3006 erp_valid, erp_value);
f0706e82 3007
1128958d 3008 mutex_lock(&local->sta_mtx);
bee7f586
JB		 3009 sta = sta_info_get(sdata, bssid);
3010
30eb1dc2
JB		 3011 if (ieee80211_config_bw(sdata, sta, elems.ht_operation,
3012 elems.vht_operation, bssid, &changed)) {
3013 mutex_unlock(&local->sta_mtx);
3014 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3015 WLAN_REASON_DEAUTH_LEAVING,
3016 true, deauth_buf);
6ff57cf8
JB		 3017 cfg80211_tx_mlme_mgmt(sdata->dev, deauth_buf,
3018 sizeof(deauth_buf));
8d61ffa5 3019 return;
30eb1dc2 3020 }
bee7f586
JB		 3021
3022 if (sta && elems.opmode_notif)
3023 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3024 rx_status->band, true);
1128958d 3025 mutex_unlock(&local->sta_mtx);
d3c990fb 3026
04b7b2ff
JB		 3027 if (elems.country_elem && elems.pwr_constr_elem &&
3028 mgmt->u.probe_resp.capab_info &
3029 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT))
1ea6f9c0
JB		 3030 changed |= ieee80211_handle_pwr_constr(sdata, chan,
3031 elems.country_elem,
3032 elems.country_elem_len,
3033 elems.pwr_constr_elem);
3f2355cb 3034
471b3efd 3035 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 3036}
3037
1fa57d01
JB		 3038void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3039 struct sk_buff *skb)
f0706e82
JB		 3040{
3041 struct ieee80211_rx_status *rx_status;
f0706e82
JB		 3042 struct ieee80211_mgmt *mgmt;
3043 u16 fc;
1b3a2e49
JB		 3044 struct ieee802_11_elems elems;
3045 int ies_len;
f0706e82 3046
f0706e82
JB		 3047 rx_status = (struct ieee80211_rx_status *) skb->cb;
3048 mgmt = (struct ieee80211_mgmt *) skb->data;
3049 fc = le16_to_cpu(mgmt->frame_control);
3050
8d61ffa5 3051 sdata_lock(sdata);
77fdaa12 3052
66e67e41
JB		 3053 switch (fc & IEEE80211_FCTL_STYPE) {
3054 case IEEE80211_STYPE_BEACON:
8d61ffa5 3055 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
66e67e41
JB		 3056 break;
3057 case IEEE80211_STYPE_PROBE_RESP:
3058 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3059 break;
3060 case IEEE80211_STYPE_AUTH:
8d61ffa5 3061 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
66e67e41
JB		 3062 break;
3063 case IEEE80211_STYPE_DEAUTH:
8d61ffa5 3064 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
66e67e41
JB		 3065 break;
3066 case IEEE80211_STYPE_DISASSOC:
8d61ffa5 3067 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
66e67e41
JB		 3068 break;
3069 case IEEE80211_STYPE_ASSOC_RESP:
3070 case IEEE80211_STYPE_REASSOC_RESP:
8d61ffa5 3071 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
66e67e41
JB		 3072 break;
3073 case IEEE80211_STYPE_ACTION:
37799e52 3074 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
1b3a2e49
JB		 3075 ies_len = skb->len -
3076 offsetof(struct ieee80211_mgmt,
3077 u.action.u.chan_switch.variable);
37799e52
JB		 3078
3079 if (ies_len < 0)
3080 break;
3081
3082 ieee802_11_parse_elems(
3083 mgmt->u.action.u.chan_switch.variable,
b2e506bf 3084 ies_len, true, &elems);
37799e52
JB		 3085
3086 if (elems.parse_error)
3087 break;
3088
1b3a2e49
JB		 3089 ieee80211_sta_process_chanswitch(sdata,
3090 rx_status->mactime,
04a161f4 3091 &elems, false);
1b3a2e49
JB		 3092 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3093 ies_len = skb->len -
3094 offsetof(struct ieee80211_mgmt,
3095 u.action.u.ext_chan_switch.variable);
3096
3097 if (ies_len < 0)
3098 break;
3099
3100 ieee802_11_parse_elems(
3101 mgmt->u.action.u.ext_chan_switch.variable,
b2e506bf 3102 ies_len, true, &elems);
1b3a2e49
JB		 3103
3104 if (elems.parse_error)
3105 break;
3106
3107 /* for the handling code pretend this was also an IE */
3108 elems.ext_chansw_ie =
3109 &mgmt->u.action.u.ext_chan_switch.data;
3110
66e67e41 3111 ieee80211_sta_process_chanswitch(sdata,
37799e52 3112 rx_status->mactime,
04a161f4 3113 &elems, false);
77fdaa12 3114 }
37799e52 3115 break;
77fdaa12 3116 }
8d61ffa5 3117 sdata_unlock(sdata);
f0706e82
JB		 3118}
3119
9c6bd790 3120static void ieee80211_sta_timer(unsigned long data)
f0706e82 3121{
60f8b39c
JB		 3122 struct ieee80211_sub_if_data *sdata =
3123 (struct ieee80211_sub_if_data *) data;
5bb644a0 3124
9b7d72c1 3125 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
f0706e82
JB		 3126}
3127
04ac3c0e 3128static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
6b684db1 3129 u8 *bssid, u8 reason, bool tx)
04ac3c0e 3130{
6ae16775 3131 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
04ac3c0e 3132
37ad3888 3133 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
6b684db1 3134 tx, frame_buf);
37ad3888 3135
6ff57cf8
JB		 3136 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3137 IEEE80211_DEAUTH_FRAME_LEN);
04ac3c0e
FF		 3138}
3139
66e67e41
JB		 3140static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
3141{
3142 struct ieee80211_local *local = sdata->local;
3143 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3144 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
1672c0e3 3145 u32 tx_flags = 0;
66e67e41 3146
8d61ffa5 3147 sdata_assert_lock(sdata);
66e67e41
JB		 3148
3149 if (WARN_ON_ONCE(!auth_data))
3150 return -EINVAL;
3151
66e67e41
JB		 3152 auth_data->tries++;
3153
3154 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
bdcbd8e0
JB		 3155 sdata_info(sdata, "authentication with %pM timed out\n",
3156 auth_data->bss->bssid);
66e67e41
JB		 3157
3158 /*
3159 * Most likely AP is not in the range so remove the
3160 * bss struct for that AP.
3161 */
3162 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3163
3164 return -ETIMEDOUT;
3165 }
3166
a1845fc7
JB		 3167 drv_mgd_prepare_tx(local, sdata);
3168
66e67e41 3169 if (auth_data->bss->proberesp_ies) {
6b8ece3a
JM		 3170 u16 trans = 1;
3171 u16 status = 0;
3172
bdcbd8e0
JB		 3173 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3174 auth_data->bss->bssid, auth_data->tries,
3175 IEEE80211_AUTH_MAX_TRIES);
66e67e41
JB		 3176
3177 auth_data->expected_transaction = 2;
6b8ece3a
JM		 3178
3179 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3180 trans = auth_data->sae_trans;
3181 status = auth_data->sae_status;
3182 auth_data->expected_transaction = trans;
3183 }
3184
6211dd12
SG		 3185 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3186 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3187 IEEE80211_TX_INTFL_MLME_CONN_TX;
3188
6b8ece3a
JM		 3189 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3190 auth_data->data, auth_data->data_len,
66e67e41 3191 auth_data->bss->bssid,
1672c0e3
JB		 3192 auth_data->bss->bssid, NULL, 0, 0,
3193 tx_flags);
66e67e41
JB		 3194 } else {
3195 const u8 *ssidie;
3196
bdcbd8e0
JB		 3197 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
3198 auth_data->bss->bssid, auth_data->tries,
3199 IEEE80211_AUTH_MAX_TRIES);
66e67e41 3200
9caf0364 3201 rcu_read_lock();
66e67e41 3202 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
9caf0364
JB		 3203 if (!ssidie) {
3204 rcu_read_unlock();
66e67e41 3205 return -EINVAL;
9caf0364 3206 }
66e67e41
JB		 3207 /*
3208 * Direct probe is sent to broadcast address as some APs
3209 * will not answer to direct packet in unassociated state.
3210 */
3211 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
6211dd12 3212 NULL, 0, (u32) -1, true, 0,
55de908a 3213 auth_data->bss->channel, false);
9caf0364 3214 rcu_read_unlock();
66e67e41
JB		 3215 }
3216
6211dd12 3217 if (tx_flags == 0) {
1672c0e3 3218 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
cb236d2d 3219 auth_data->timeout_started = true;
8d61ffa5 3220 run_again(sdata, auth_data->timeout);
89afe614 3221 } else {
cb236d2d
JB		 3222 auth_data->timeout =
3223 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3224 auth_data->timeout_started = true;
3225 run_again(sdata, auth_data->timeout);
1672c0e3 3226 }
66e67e41
JB		 3227
3228 return 0;
3229}
3230
3231static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3232{
3233 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3234 struct ieee80211_local *local = sdata->local;
3235
8d61ffa5 3236 sdata_assert_lock(sdata);
66e67e41 3237
66e67e41
JB		 3238 assoc_data->tries++;
3239 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
bdcbd8e0
JB		 3240 sdata_info(sdata, "association with %pM timed out\n",
3241 assoc_data->bss->bssid);
66e67e41
JB		 3242
3243 /*
3244 * Most likely AP is not in the range so remove the
3245 * bss struct for that AP.
3246 */
3247 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3248
3249 return -ETIMEDOUT;
3250 }
3251
bdcbd8e0
JB		 3252 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3253 assoc_data->bss->bssid, assoc_data->tries,
3254 IEEE80211_ASSOC_MAX_TRIES);
66e67e41
JB		 3255 ieee80211_send_assoc(sdata);
3256
1672c0e3
JB		 3257 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
3258 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
89afe614 3259 assoc_data->timeout_started = true;
8d61ffa5 3260 run_again(sdata, assoc_data->timeout);
89afe614 3261 } else {
cb236d2d
JB		 3262 assoc_data->timeout =
3263 round_jiffies_up(jiffies +
3264 IEEE80211_ASSOC_TIMEOUT_LONG);
3265 assoc_data->timeout_started = true;
3266 run_again(sdata, assoc_data->timeout);
1672c0e3 3267 }
66e67e41
JB		 3268
3269 return 0;
3270}
3271
1672c0e3
JB		 3272void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3273 __le16 fc, bool acked)
3274{
3275 struct ieee80211_local *local = sdata->local;
3276
3277 sdata->u.mgd.status_fc = fc;
3278 sdata->u.mgd.status_acked = acked;
3279 sdata->u.mgd.status_received = true;
3280
3281 ieee80211_queue_work(&local->hw, &sdata->work);
3282}
3283
1fa57d01 3284void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 3285{
9c6bd790 3286 struct ieee80211_local *local = sdata->local;
1fa57d01 3287 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 3288
8d61ffa5 3289 sdata_lock(sdata);
77fdaa12 3290
1672c0e3
JB		 3291 if (ifmgd->status_received) {
3292 __le16 fc = ifmgd->status_fc;
3293 bool status_acked = ifmgd->status_acked;
3294
3295 ifmgd->status_received = false;
3296 if (ifmgd->auth_data &&
3297 (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) {
3298 if (status_acked) {
3299 ifmgd->auth_data->timeout =
3300 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
8d61ffa5 3301 run_again(sdata, ifmgd->auth_data->timeout);
1672c0e3
JB		 3302 } else {
3303 ifmgd->auth_data->timeout = jiffies - 1;
3304 }
89afe614 3305 ifmgd->auth_data->timeout_started = true;
1672c0e3
JB		 3306 } else if (ifmgd->assoc_data &&
3307 (ieee80211_is_assoc_req(fc) ||
3308 ieee80211_is_reassoc_req(fc))) {
3309 if (status_acked) {
3310 ifmgd->assoc_data->timeout =
3311 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
8d61ffa5 3312 run_again(sdata, ifmgd->assoc_data->timeout);
1672c0e3
JB		 3313 } else {
3314 ifmgd->assoc_data->timeout = jiffies - 1;
3315 }
89afe614 3316 ifmgd->assoc_data->timeout_started = true;
1672c0e3
JB		 3317 }
3318 }
3319
89afe614 3320 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
66e67e41
JB		 3321 time_after(jiffies, ifmgd->auth_data->timeout)) {
3322 if (ifmgd->auth_data->done) {
3323 /*
3324 * ok ... we waited for assoc but userspace didn't,
3325 * so let's just kill the auth data
3326 */
3327 ieee80211_destroy_auth_data(sdata, false);
3328 } else if (ieee80211_probe_auth(sdata)) {
3329 u8 bssid[ETH_ALEN];
3330
3331 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3332
3333 ieee80211_destroy_auth_data(sdata, false);
3334
6ff57cf8 3335 cfg80211_auth_timeout(sdata->dev, bssid);
66e67e41 3336 }
89afe614 3337 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
8d61ffa5 3338 run_again(sdata, ifmgd->auth_data->timeout);
66e67e41 3339
89afe614 3340 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
66e67e41 3341 time_after(jiffies, ifmgd->assoc_data->timeout)) {
989c6505 3342 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
66e67e41 3343 ieee80211_do_assoc(sdata)) {
959867fa 3344 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
66e67e41
JB		 3345
3346 ieee80211_destroy_assoc_data(sdata, false);
959867fa 3347 cfg80211_assoc_timeout(sdata->dev, bss);
66e67e41 3348 }
89afe614 3349 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
8d61ffa5 3350 run_again(sdata, ifmgd->assoc_data->timeout);
66e67e41 3351
392b9ffb 3352 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
b291ba11 3353 ifmgd->associated) {
a43abf29 3354 u8 bssid[ETH_ALEN];
72a8a3ed 3355 int max_tries;
a43abf29 3356
0c1ad2ca 3357 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 3358
72a8a3ed 3359 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
180205bd 3360 max_tries = max_nullfunc_tries;
72a8a3ed 3361 else
180205bd 3362 max_tries = max_probe_tries;
72a8a3ed 3363
4e5ff376
FF		 3364 /* ACK received for nullfunc probing frame */
3365 if (!ifmgd->probe_send_count)
3366 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 3367 else if (ifmgd->nullfunc_failed) {
3368 if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3369 mlme_dbg(sdata,
3370 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3371 bssid, ifmgd->probe_send_count,
3372 max_tries);
04ac3c0e
FF		 3373 ieee80211_mgd_probe_ap_send(sdata);
3374 } else {
bdcbd8e0
JB		 3375 mlme_dbg(sdata,
3376 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3377 bssid);
95acac61 3378 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1
JB		 3379 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3380 false);
04ac3c0e
FF		 3381 }
3382 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
8d61ffa5 3383 run_again(sdata, ifmgd->probe_timeout);
04ac3c0e 3384 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
bdcbd8e0
JB		 3385 mlme_dbg(sdata,
3386 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3387 bssid, probe_wait_ms);
95acac61 3388 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 3389 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
04ac3c0e 3390 } else if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3391 mlme_dbg(sdata,
3392 "No probe response from AP %pM after %dms, try %d/%i\n",
3393 bssid, probe_wait_ms,
3394 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 3395 ieee80211_mgd_probe_ap_send(sdata);
3396 } else {
b291ba11
JB		 3397 /*
3398 * We actually lost the connection ... or did we?
3399 * Let's make sure!
3400 */
b38afa87
BG		 3401 wiphy_debug(local->hw.wiphy,
3402 "%s: No probe response from AP %pM"
3403 " after %dms, disconnecting.\n",
3404 sdata->name,
180205bd 3405 bssid, probe_wait_ms);
04ac3c0e 3406
95acac61 3407 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 3408 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
b291ba11
JB		 3409 }
3410 }
3411
8d61ffa5 3412 sdata_unlock(sdata);
f0706e82
JB		 3413}
3414
b291ba11
JB		 3415static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3416{
3417 struct ieee80211_sub_if_data *sdata =
3418 (struct ieee80211_sub_if_data *) data;
3419 struct ieee80211_local *local = sdata->local;
3420
3421 if (local->quiescing)
3422 return;
3423
682bd38b 3424 sdata->u.mgd.connection_loss = false;
1e4dcd01
JO		 3425 ieee80211_queue_work(&sdata->local->hw,
3426 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 3427}
3428
3429static void ieee80211_sta_conn_mon_timer(unsigned long data)
3430{
3431 struct ieee80211_sub_if_data *sdata =
3432 (struct ieee80211_sub_if_data *) data;
3433 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3434 struct ieee80211_local *local = sdata->local;
3435
3436 if (local->quiescing)
3437 return;
3438
42935eca 3439 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 3440}
3441
3442static void ieee80211_sta_monitor_work(struct work_struct *work)
3443{
3444 struct ieee80211_sub_if_data *sdata =
3445 container_of(work, struct ieee80211_sub_if_data,
3446 u.mgd.monitor_work);
3447
3448 ieee80211_mgd_probe_ap(sdata, false);
3449}
3450
9c6bd790
JB		 3451static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3452{
494f1fe5
EP		 3453 u32 flags;
3454
ad935687 3455 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
925e64c3 3456 __ieee80211_stop_poll(sdata);
ad935687 3457
b291ba11 3458 /* let's probe the connection once */
494f1fe5
EP		 3459 flags = sdata->local->hw.flags;
3460 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3461 ieee80211_queue_work(&sdata->local->hw,
3462 &sdata->u.mgd.monitor_work);
b291ba11 3463 /* and do all the other regular work too */
64592c8f 3464 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 3465 }
9c6bd790 3466}
f0706e82 3467
b8360ab8
JB		 3468#ifdef CONFIG_PM
3469void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
3470{
3471 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3472
8d61ffa5 3473 sdata_lock(sdata);
b8360ab8 3474 if (!ifmgd->associated) {
8d61ffa5 3475 sdata_unlock(sdata);
b8360ab8
JB		 3476 return;
3477 }
3478
3479 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
3480 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
3481 mlme_dbg(sdata, "driver requested disconnect after resume\n");
3482 ieee80211_sta_connection_lost(sdata,
3483 ifmgd->associated->bssid,
3484 WLAN_REASON_UNSPECIFIED,
3485 true);
8d61ffa5 3486 sdata_unlock(sdata);
b8360ab8
JB		 3487 return;
3488 }
8d61ffa5 3489 sdata_unlock(sdata);
b8360ab8
JB		 3490}
3491#endif
3492
9c6bd790
JB		 3493/* interface setup */
3494void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 3495{
46900298 3496 struct ieee80211_if_managed *ifmgd;
988c0f72 3497
46900298 3498 ifmgd = &sdata->u.mgd;
b291ba11 3499 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 3500 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 3501 INIT_WORK(&ifmgd->beacon_connection_loss_work,
3502 ieee80211_beacon_connection_loss_work);
882a7c69
JB		 3503 INIT_WORK(&ifmgd->csa_connection_drop_work,
3504 ieee80211_csa_connection_drop_work);
687da132 3505 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
46900298 3506 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 3507 (unsigned long) sdata);
b291ba11
JB		 3508 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
3509 (unsigned long) sdata);
3510 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
3511 (unsigned long) sdata);
46900298 3512 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 3513 (unsigned long) sdata);
9c6bd790 3514
ab1faead 3515 ifmgd->flags = 0;
1478acb3 3516 ifmgd->powersave = sdata->wdev.ps;
219c3867
AB		 3517 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
3518 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
67baf663 3519 ifmgd->p2p_noa_index = -1;
bbbdff9e 3520
0f78231b
JB		 3521 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
3522 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
3523 else
3524 ifmgd->req_smps = IEEE80211_SMPS_OFF;
f0706e82
JB		 3525}
3526
77fdaa12
JB		 3527/* scan finished notification */
3528void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 3529{
31ee67a1 3530 struct ieee80211_sub_if_data *sdata;
60f8b39c 3531
77fdaa12
JB		 3532 /* Restart STA timers */
3533 rcu_read_lock();
370bd005
BG		 3534 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3535 if (ieee80211_sdata_running(sdata))
3536 ieee80211_restart_sta_timer(sdata);
3537 }
77fdaa12
JB		 3538 rcu_read_unlock();
3539}
60f8b39c 3540
77fdaa12
JB		 3541int ieee80211_max_network_latency(struct notifier_block *nb,
3542 unsigned long data, void *dummy)
3543{
3544 s32 latency_usec = (s32) data;
3545 struct ieee80211_local *local =
3546 container_of(nb, struct ieee80211_local,
3547 network_latency_notifier);
1fa6f4af 3548
77fdaa12
JB		 3549 mutex_lock(&local->iflist_mtx);
3550 ieee80211_recalc_ps(local, latency_usec);
3551 mutex_unlock(&local->iflist_mtx);
dfe67012 3552
77fdaa12 3553 return 0;
9c6bd790
JB		 3554}
3555
f2d9d270
JB		 3556static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
3557 struct cfg80211_bss *cbss)
3558{
3559 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3560 const u8 *ht_cap_ie, *vht_cap_ie;
3561 const struct ieee80211_ht_cap *ht_cap;
3562 const struct ieee80211_vht_cap *vht_cap;
3563 u8 chains = 1;
3564
3565 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
3566 return chains;
3567
9caf0364 3568 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
f2d9d270
JB		 3569 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
3570 ht_cap = (void *)(ht_cap_ie + 2);
3571 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
3572 /*
3573 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
3574 * "Tx Unequal Modulation Supported" fields.
3575 */
3576 }
3577
3578 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
3579 return chains;
3580
9caf0364 3581 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
f2d9d270
JB		 3582 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
3583 u8 nss;
3584 u16 tx_mcs_map;
3585
3586 vht_cap = (void *)(vht_cap_ie + 2);
3587 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
3588 for (nss = 8; nss > 0; nss--) {
3589 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
3590 IEEE80211_VHT_MCS_NOT_SUPPORTED)
3591 break;
3592 }
3593 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
3594 chains = max(chains, nss);
3595 }
3596
3597 return chains;
3598}
3599
b17166a7
JB		 3600static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
3601 struct cfg80211_bss *cbss)
a1cf775d
JB		 3602{
3603 struct ieee80211_local *local = sdata->local;
3604 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
24398e39 3605 const struct ieee80211_ht_operation *ht_oper = NULL;
f2d9d270 3606 const struct ieee80211_vht_operation *vht_oper = NULL;
24398e39 3607 struct ieee80211_supported_band *sband;
4bf88530 3608 struct cfg80211_chan_def chandef;
f2d9d270 3609 int ret;
a1cf775d 3610
24398e39
JB		 3611 sband = local->hw.wiphy->bands[cbss->channel->band];
3612
f2d9d270
JB		 3613 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
3614 IEEE80211_STA_DISABLE_80P80MHZ |
3615 IEEE80211_STA_DISABLE_160MHZ);
3616
9caf0364
JB		 3617 rcu_read_lock();
3618
f2d9d270
JB		 3619 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3620 sband->ht_cap.ht_supported) {
08e6effa 3621 const u8 *ht_oper_ie, *ht_cap;
24398e39 3622
9caf0364 3623 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
24398e39
JB		 3624 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3625 ht_oper = (void *)(ht_oper_ie + 2);
08e6effa
JB		 3626
3627 ht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
3628 if (!ht_cap || ht_cap[1] < sizeof(struct ieee80211_ht_cap)) {
3629 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3630 ht_oper = NULL;
3631 }
24398e39
JB		 3632 }
3633
f2d9d270
JB		 3634 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3635 sband->vht_cap.vht_supported) {
08e6effa 3636 const u8 *vht_oper_ie, *vht_cap;
f2d9d270 3637
9caf0364
JB		 3638 vht_oper_ie = ieee80211_bss_get_ie(cbss,
3639 WLAN_EID_VHT_OPERATION);
f2d9d270
JB		 3640 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
3641 vht_oper = (void *)(vht_oper_ie + 2);
3642 if (vht_oper && !ht_oper) {
3643 vht_oper = NULL;
bdcbd8e0 3644 sdata_info(sdata,
f2d9d270 3645 "AP advertised VHT without HT, disabling both\n");
cb145022
JB		 3646 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3647 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
24398e39 3648 }
08e6effa
JB		 3649
3650 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
3651 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
3652 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3653 vht_oper = NULL;
3654 }
24398e39
JB		 3655 }
3656
f2d9d270
JB		 3657 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
3658 cbss->channel,
3659 ht_oper, vht_oper,
5cdaed1e 3660 &chandef, false);
04ecd257 3661
f2d9d270
JB		 3662 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
3663 local->rx_chains);
24398e39 3664
9caf0364
JB		 3665 rcu_read_unlock();
3666
04ecd257
JB		 3667 /* will change later if needed */
3668 sdata->smps_mode = IEEE80211_SMPS_OFF;
3669
f2d9d270
JB		 3670 /*
3671 * If this fails (possibly due to channel context sharing
3672 * on incompatible channels, e.g. 80+80 and 160 sharing the
3673 * same control channel) try to use a smaller bandwidth.
3674 */
3675 ret = ieee80211_vif_use_channel(sdata, &chandef,
3676 IEEE80211_CHANCTX_SHARED);
0418a445
SW		 3677
3678 /* don't downgrade for 5 and 10 MHz channels, though. */
3679 if (chandef.width == NL80211_CHAN_WIDTH_5 ||
3680 chandef.width == NL80211_CHAN_WIDTH_10)
3681 return ret;
3682
d601cd8d 3683 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
e6b7cde4 3684 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
d601cd8d
JB		 3685 ret = ieee80211_vif_use_channel(sdata, &chandef,
3686 IEEE80211_CHANCTX_SHARED);
3687 }
f2d9d270 3688 return ret;
b17166a7
JB		 3689}
3690
3691static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
3692 struct cfg80211_bss *cbss, bool assoc)
3693{
3694 struct ieee80211_local *local = sdata->local;
3695 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3696 struct ieee80211_bss *bss = (void *)cbss->priv;
3697 struct sta_info *new_sta = NULL;
3698 bool have_sta = false;
3699 int err;
3700
3701 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3702 return -EINVAL;
3703
3704 if (assoc) {
3705 rcu_read_lock();
3706 have_sta = sta_info_get(sdata, cbss->bssid);
3707 rcu_read_unlock();
3708 }
3709
3710 if (!have_sta) {
3711 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
3712 if (!new_sta)
3713 return -ENOMEM;
3714 }
13e0c8e3 3715 if (new_sta) {
5d6a1b06
JB		 3716 u32 rates = 0, basic_rates = 0;
3717 bool have_higher_than_11mbit;
3718 int min_rate = INT_MAX, min_rate_index = -1;
2103dec1 3719 struct ieee80211_chanctx_conf *chanctx_conf;
b17166a7 3720 struct ieee80211_supported_band *sband;
8cef2c9d 3721 const struct cfg80211_bss_ies *ies;
2103dec1
SW		 3722 int shift;
3723 u32 rate_flags;
b17166a7
JB		 3724
3725 sband = local->hw.wiphy->bands[cbss->channel->band];
3726
3727 err = ieee80211_prep_channel(sdata, cbss);
3728 if (err) {
3729 sta_info_free(local, new_sta);
2103dec1 3730 return -EINVAL;
b17166a7 3731 }
2103dec1
SW		 3732 shift = ieee80211_vif_get_shift(&sdata->vif);
3733
3734 rcu_read_lock();
3735 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3736 if (WARN_ON(!chanctx_conf)) {
3737 rcu_read_unlock();
3738 return -EINVAL;
3739 }
3740 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
3741 rcu_read_unlock();
5d6a1b06 3742
5d6a1b06
JB		 3743 ieee80211_get_rates(sband, bss->supp_rates,
3744 bss->supp_rates_len,
3745 &rates, &basic_rates,
3746 &have_higher_than_11mbit,
2103dec1
SW		 3747 &min_rate, &min_rate_index,
3748 shift, rate_flags);
5d6a1b06
JB		 3749
3750 /*
3751 * This used to be a workaround for basic rates missing
3752 * in the association response frame. Now that we no
3753 * longer use the basic rates from there, it probably
3754 * doesn't happen any more, but keep the workaround so
3755 * in case some *other* APs are buggy in different ways
3756 * we can connect -- with a warning.
3757 */
3758 if (!basic_rates && min_rate_index >= 0) {
bdcbd8e0
JB		 3759 sdata_info(sdata,
3760 "No basic rates, using min rate instead\n");
5d6a1b06
JB		 3761 basic_rates = BIT(min_rate_index);
3762 }
3763
13e0c8e3 3764 new_sta->sta.supp_rates[cbss->channel->band] = rates;
5d6a1b06
JB		 3765 sdata->vif.bss_conf.basic_rates = basic_rates;
3766
3767 /* cf. IEEE 802.11 9.2.12 */
55de908a 3768 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
5d6a1b06
JB		 3769 have_higher_than_11mbit)
3770 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3771 else
3772 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
3773
3774 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
3775
8c358bcd
JB		 3776 /* set timing information */
3777 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
8cef2c9d 3778 rcu_read_lock();
ef429dad
JB		 3779 ies = rcu_dereference(cbss->beacon_ies);
3780 if (ies) {
3781 const u8 *tim_ie;
3782
3783 sdata->vif.bss_conf.sync_tsf = ies->tsf;
3784 sdata->vif.bss_conf.sync_device_ts =
3785 bss->device_ts_beacon;
3786 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
3787 ies->data, ies->len);
3788 if (tim_ie && tim_ie[1] >= 2)
3789 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
3790 else
3791 sdata->vif.bss_conf.sync_dtim_count = 0;
3792 } else if (!(local->hw.flags &
3793 IEEE80211_HW_TIMING_BEACON_ONLY)) {
3794 ies = rcu_dereference(cbss->proberesp_ies);
3795 /* must be non-NULL since beacon IEs were NULL */
3796 sdata->vif.bss_conf.sync_tsf = ies->tsf;
3797 sdata->vif.bss_conf.sync_device_ts =
3798 bss->device_ts_presp;
3799 sdata->vif.bss_conf.sync_dtim_count = 0;
3800 } else {
3801 sdata->vif.bss_conf.sync_tsf = 0;
3802 sdata->vif.bss_conf.sync_device_ts = 0;
3803 sdata->vif.bss_conf.sync_dtim_count = 0;
3804 }
8cef2c9d 3805 rcu_read_unlock();
8c358bcd
JB		 3806
3807 /* tell driver about BSSID, basic rates and timing */
5d6a1b06 3808 ieee80211_bss_info_change_notify(sdata,
8c358bcd
JB		 3809 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
3810 BSS_CHANGED_BEACON_INT);
a1cf775d
JB		 3811
3812 if (assoc)
13e0c8e3 3813 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
a1cf775d 3814
13e0c8e3
JB		 3815 err = sta_info_insert(new_sta);
3816 new_sta = NULL;
a1cf775d 3817 if (err) {
bdcbd8e0
JB		 3818 sdata_info(sdata,
3819 "failed to insert STA entry for the AP (error %d)\n",
3820 err);
a1cf775d
JB		 3821 return err;
3822 }
3823 } else
b203ca39 3824 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
a1cf775d
JB		 3825
3826 return 0;
3827}
3828
77fdaa12
JB		 3829/* config hooks */
3830int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
3831 struct cfg80211_auth_request *req)
9c6bd790 3832{
66e67e41
JB		 3833 struct ieee80211_local *local = sdata->local;
3834 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3835 struct ieee80211_mgd_auth_data *auth_data;
77fdaa12 3836 u16 auth_alg;
66e67e41
JB		 3837 int err;
3838
3839 /* prepare auth data structure */
9c6bd790 3840
77fdaa12
JB		 3841 switch (req->auth_type) {
3842 case NL80211_AUTHTYPE_OPEN_SYSTEM:
3843 auth_alg = WLAN_AUTH_OPEN;
3844 break;
3845 case NL80211_AUTHTYPE_SHARED_KEY:
66e67e41 3846 if (IS_ERR(local->wep_tx_tfm))
9dca9c49 3847 return -EOPNOTSUPP;
77fdaa12
JB		 3848 auth_alg = WLAN_AUTH_SHARED_KEY;
3849 break;
3850 case NL80211_AUTHTYPE_FT:
3851 auth_alg = WLAN_AUTH_FT;
3852 break;
3853 case NL80211_AUTHTYPE_NETWORK_EAP:
3854 auth_alg = WLAN_AUTH_LEAP;
3855 break;
6b8ece3a
JM		 3856 case NL80211_AUTHTYPE_SAE:
3857 auth_alg = WLAN_AUTH_SAE;
3858 break;
77fdaa12
JB		 3859 default:
3860 return -EOPNOTSUPP;
60f8b39c 3861 }
77fdaa12 3862
6b8ece3a
JM		 3863 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
3864 req->ie_len, GFP_KERNEL);
66e67e41 3865 if (!auth_data)
9c6bd790 3866 return -ENOMEM;
77fdaa12 3867
66e67e41 3868 auth_data->bss = req->bss;
77fdaa12 3869
6b8ece3a
JM		 3870 if (req->sae_data_len >= 4) {
3871 __le16 *pos = (__le16 *) req->sae_data;
3872 auth_data->sae_trans = le16_to_cpu(pos[0]);
3873 auth_data->sae_status = le16_to_cpu(pos[1]);
3874 memcpy(auth_data->data, req->sae_data + 4,
3875 req->sae_data_len - 4);
3876 auth_data->data_len += req->sae_data_len - 4;
3877 }
3878
77fdaa12 3879 if (req->ie && req->ie_len) {
6b8ece3a
JM		 3880 memcpy(&auth_data->data[auth_data->data_len],
3881 req->ie, req->ie_len);
3882 auth_data->data_len += req->ie_len;
9c6bd790 3883 }
77fdaa12 3884
fffd0934 3885 if (req->key && req->key_len) {
66e67e41
JB		 3886 auth_data->key_len = req->key_len;
3887 auth_data->key_idx = req->key_idx;
3888 memcpy(auth_data->key, req->key, req->key_len);
fffd0934
JB		 3889 }
3890
66e67e41 3891 auth_data->algorithm = auth_alg;
60f8b39c 3892
66e67e41 3893 /* try to authenticate/probe */
2a33bee2 3894
66e67e41
JB		 3895 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
3896 ifmgd->assoc_data) {
3897 err = -EBUSY;
3898 goto err_free;
2a33bee2
GE		 3899 }
3900
66e67e41
JB		 3901 if (ifmgd->auth_data)
3902 ieee80211_destroy_auth_data(sdata, false);
2a33bee2 3903
66e67e41
JB		 3904 /* prep auth_data so we don't go into idle on disassoc */
3905 ifmgd->auth_data = auth_data;
af6b6374 3906
7b119dc0
JB		 3907 if (ifmgd->associated) {
3908 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3909
3910 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3911 WLAN_REASON_UNSPECIFIED,
3912 false, frame_buf);
3913
6ff57cf8
JB		 3914 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3915 sizeof(frame_buf));
7b119dc0 3916 }
af6b6374 3917
bdcbd8e0 3918 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
e5b900d2 3919
a1cf775d
JB		 3920 err = ieee80211_prep_connection(sdata, req->bss, false);
3921 if (err)
66e67e41 3922 goto err_clear;
af6b6374 3923
66e67e41
JB		 3924 err = ieee80211_probe_auth(sdata);
3925 if (err) {
66e67e41
JB		 3926 sta_info_destroy_addr(sdata, req->bss->bssid);
3927 goto err_clear;
3928 }
3929
3930 /* hold our own reference */
5b112d3d 3931 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
8d61ffa5 3932 return 0;
66e67e41
JB		 3933
3934 err_clear:
3d2abdfd
EP		 3935 memset(ifmgd->bssid, 0, ETH_ALEN);
3936 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 3937 ifmgd->auth_data = NULL;
3938 err_free:
3939 kfree(auth_data);
66e67e41 3940 return err;
af6b6374
JB		 3941}
3942
095d81ce
JB		 3943static bool ieee80211_usable_wmm_params(struct ieee80211_sub_if_data *sdata,
3944 const u8 *wmm_param, int len)
3945{
3946 const u8 *pos;
3947 size_t left;
3948
3949 if (len < 8)
3950 return false;
3951
3952 if (wmm_param[5] != 1 /* version */)
3953 return false;
3954
3955 pos = wmm_param + 8;
3956 left = len - 8;
3957
3958 for (; left >= 4; left -= 4, pos += 4) {
3959 u8 aifsn = pos[0] & 0x0f;
3960 u8 ecwmin = pos[1] & 0x0f;
3961 u8 ecwmax = (pos[1] & 0xf0) >> 4;
3962 int aci = (pos[0] >> 5) & 0x03;
3963
3964 if (aifsn < 2) {
3965 sdata_info(sdata,
3966 "AP has invalid WMM params (AIFSN=%d for ACI %d), disabling WMM\n",
3967 aifsn, aci);
3968 return false;
3969 }
3970 if (ecwmin > ecwmax) {
3971 sdata_info(sdata,
3972 "AP has invalid WMM params (ECWmin/max=%d/%d for ACI %d), disabling WMM\n",
3973 ecwmin, ecwmax, aci);
3974 return false;
3975 }
3976 }
3977
3978 return true;
3979}
3980
77fdaa12
JB		 3981int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
3982 struct cfg80211_assoc_request *req)
f0706e82 3983{
66e67e41 3984 struct ieee80211_local *local = sdata->local;
77fdaa12 3985 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 3986 struct ieee80211_bss *bss = (void *)req->bss->priv;
66e67e41 3987 struct ieee80211_mgd_assoc_data *assoc_data;
c65dd147 3988 const struct cfg80211_bss_ies *beacon_ies;
4e74bfdb 3989 struct ieee80211_supported_band *sband;
b08fbbd8 3990 const u8 *ssidie, *ht_ie, *vht_ie;
2a33bee2 3991 int i, err;
f0706e82 3992
66e67e41
JB		 3993 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
3994 if (!assoc_data)
3995 return -ENOMEM;
3996
9caf0364
JB		 3997 rcu_read_lock();
3998 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
3999 if (!ssidie) {
4000 rcu_read_unlock();
4001 kfree(assoc_data);
4002 return -EINVAL;
4003 }
4004 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4005 assoc_data->ssid_len = ssidie[1];
4006 rcu_read_unlock();
4007
7b119dc0
JB		 4008 if (ifmgd->associated) {
4009 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4010
4011 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4012 WLAN_REASON_UNSPECIFIED,
4013 false, frame_buf);
4014
6ff57cf8
JB		 4015 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4016 sizeof(frame_buf));
7b119dc0 4017 }
66e67e41
JB		 4018
4019 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4020 err = -EBUSY;
4021 goto err_free;
af6b6374 4022 }
77fdaa12 4023
66e67e41
JB		 4024 if (ifmgd->assoc_data) {
4025 err = -EBUSY;
4026 goto err_free;
4027 }
77fdaa12 4028
66e67e41
JB		 4029 if (ifmgd->auth_data) {
4030 bool match;
4031
4032 /* keep sta info, bssid if matching */
b203ca39 4033 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
66e67e41 4034 ieee80211_destroy_auth_data(sdata, match);
2a33bee2
GE		 4035 }
4036
66e67e41 4037 /* prepare assoc data */
095d81ce 4038
d8ec4433
JO		 4039 ifmgd->beacon_crc_valid = false;
4040
095d81ce
JB		 4041 assoc_data->wmm = bss->wmm_used &&
4042 (local->hw.queues >= IEEE80211_NUM_ACS);
4043 if (assoc_data->wmm) {
4044 /* try to check validity of WMM params IE */
4045 const struct cfg80211_bss_ies *ies;
4046 const u8 *wp, *start, *end;
4047
4048 rcu_read_lock();
4049 ies = rcu_dereference(req->bss->ies);
4050 start = ies->data;
4051 end = start + ies->len;
4052
4053 while (true) {
4054 wp = cfg80211_find_vendor_ie(
4055 WLAN_OUI_MICROSOFT,
4056 WLAN_OUI_TYPE_MICROSOFT_WMM,
4057 start, end - start);
4058 if (!wp)
4059 break;
4060 start = wp + wp[1] + 2;
4061 /* if this IE is too short, try the next */
4062 if (wp[1] <= 4)
4063 continue;
4064 /* if this IE is WMM params, we found what we wanted */
4065 if (wp[6] == 1)
4066 break;
4067 }
4068
4069 if (!wp || !ieee80211_usable_wmm_params(sdata, wp + 2,
4070 wp[1] - 2)) {
4071 assoc_data->wmm = false;
4072 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
4073 }
4074 rcu_read_unlock();
4075 }
4076
de5036aa
JB		 4077 /*
4078 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4079 * We still associate in non-HT mode (11a/b/g) if any one of these
4080 * ciphers is configured as pairwise.
4081 * We can set this to true for non-11n hardware, that'll be checked
4082 * separately along with the peer capabilities.
4083 */
1c4cb928 4084 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
77fdaa12
JB		 4085 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4086 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
1c4cb928 4087 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
a8243b72 4088 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
d545daba 4089 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
1c4cb928 4090 netdev_info(sdata->dev,
d545daba 4091 "disabling HT/VHT due to WEP/TKIP use\n");
1c4cb928
JB		 4092 }
4093 }
77fdaa12 4094
d545daba 4095 if (req->flags & ASSOC_REQ_DISABLE_HT) {
a8243b72 4096 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
d545daba
MP		 4097 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4098 }
ef96a842 4099
dd5ecfea
JB		 4100 if (req->flags & ASSOC_REQ_DISABLE_VHT)
4101 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4102
4e74bfdb
JB		 4103 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4104 sband = local->hw.wiphy->bands[req->bss->channel->band];
4105 if (!sband->ht_cap.ht_supported ||
095d81ce
JB		 4106 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4107 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
a8243b72 4108 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
095d81ce
JB		 4109 if (!bss->wmm_used &&
4110 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
1b49de26
JB		 4111 netdev_info(sdata->dev,
4112 "disabling HT as WMM/QoS is not supported by the AP\n");
1c4cb928 4113 }
4e74bfdb 4114
d545daba
MP		 4115 /* disable VHT if we don't support it or the AP doesn't use WMM */
4116 if (!sband->vht_cap.vht_supported ||
095d81ce
JB		 4117 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4118 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
d545daba 4119 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
095d81ce
JB		 4120 if (!bss->wmm_used &&
4121 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
1b49de26
JB		 4122 netdev_info(sdata->dev,
4123 "disabling VHT as WMM/QoS is not supported by the AP\n");
d545daba
MP		 4124 }
4125
ef96a842
BG		 4126 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4127 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4128 sizeof(ifmgd->ht_capa_mask));
4129
dd5ecfea
JB		 4130 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4131 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4132 sizeof(ifmgd->vht_capa_mask));
4133
77fdaa12 4134 if (req->ie && req->ie_len) {
66e67e41
JB		 4135 memcpy(assoc_data->ie, req->ie, req->ie_len);
4136 assoc_data->ie_len = req->ie_len;
4137 }
f679f65d 4138
66e67e41 4139 assoc_data->bss = req->bss;
f679f65d 4140
af6b6374
JB		 4141 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4142 if (ifmgd->powersave)
04ecd257 4143 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
af6b6374 4144 else
04ecd257 4145 sdata->smps_mode = IEEE80211_SMPS_OFF;
af6b6374 4146 } else
04ecd257 4147 sdata->smps_mode = ifmgd->req_smps;
af6b6374 4148
66e67e41 4149 assoc_data->capability = req->bss->capability;
66e67e41
JB		 4150 assoc_data->supp_rates = bss->supp_rates;
4151 assoc_data->supp_rates_len = bss->supp_rates_len;
9dde6423 4152
9caf0364 4153 rcu_read_lock();
9dde6423
JB		 4154 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4155 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4156 assoc_data->ap_ht_param =
4157 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4158 else
a8243b72 4159 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
b08fbbd8
JB		 4160 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4161 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4162 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4163 sizeof(struct ieee80211_vht_cap));
4164 else
4165 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
9caf0364 4166 rcu_read_unlock();
63f170e0 4167
ab13315a 4168 if (bss->wmm_used && bss->uapsd_supported &&
24aa11ab
AB		 4169 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD) &&
4170 sdata->wmm_acm != 0xff) {
76f0303d 4171 assoc_data->uapsd = true;
ab13315a
KV		 4172 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4173 } else {
76f0303d 4174 assoc_data->uapsd = false;
ab13315a
KV		 4175 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4176 }
4177
77fdaa12 4178 if (req->prev_bssid)
66e67e41 4179 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12
JB		 4180
4181 if (req->use_mfp) {
4182 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4183 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4184 } else {
4185 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4186 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4187 }
4188
4189 if (req->crypto.control_port)
4190 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4191 else
4192 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4193
a621fa4d
JB		 4194 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4195 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
2475b1cc
MS		 4196 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
4197 sdata->vif.type);
a621fa4d 4198
66e67e41
JB		 4199 /* kick off associate process */
4200
4201 ifmgd->assoc_data = assoc_data;
826262c3 4202 ifmgd->dtim_period = 0;
989c6505 4203 ifmgd->have_beacon = false;
66e67e41 4204
a1cf775d
JB		 4205 err = ieee80211_prep_connection(sdata, req->bss, true);
4206 if (err)
4207 goto err_clear;
66e67e41 4208
c65dd147
EG		 4209 rcu_read_lock();
4210 beacon_ies = rcu_dereference(req->bss->beacon_ies);
826262c3 4211
c65dd147
EG		 4212 if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC &&
4213 !beacon_ies) {
4214 /*
4215 * Wait up to one beacon interval ...
4216 * should this be more if we miss one?
4217 */
4218 sdata_info(sdata, "waiting for beacon from %pM\n",
4219 ifmgd->bssid);
4220 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
89afe614 4221 assoc_data->timeout_started = true;
c65dd147
EG		 4222 assoc_data->need_beacon = true;
4223 } else if (beacon_ies) {
4224 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4225 beacon_ies->data,
4226 beacon_ies->len);
ef429dad
JB		 4227 u8 dtim_count = 0;
4228
c65dd147
EG		 4229 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4230 const struct ieee80211_tim_ie *tim;
4231 tim = (void *)(tim_ie + 2);
4232 ifmgd->dtim_period = tim->dtim_period;
ef429dad 4233 dtim_count = tim->dtim_count;
826262c3 4234 }
989c6505 4235 ifmgd->have_beacon = true;
66e67e41 4236 assoc_data->timeout = jiffies;
89afe614 4237 assoc_data->timeout_started = true;
ef429dad
JB		 4238
4239 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
4240 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4241 sdata->vif.bss_conf.sync_device_ts =
4242 bss->device_ts_beacon;
4243 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4244 }
c65dd147
EG		 4245 } else {
4246 assoc_data->timeout = jiffies;
89afe614 4247 assoc_data->timeout_started = true;
66e67e41 4248 }
c65dd147
EG		 4249 rcu_read_unlock();
4250
8d61ffa5 4251 run_again(sdata, assoc_data->timeout);
66e67e41 4252
fcff4f10
PS		 4253 if (bss->corrupt_data) {
4254 char *corrupt_type = "data";
4255 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4256 if (bss->corrupt_data &
4257 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4258 corrupt_type = "beacon and probe response";
4259 else
4260 corrupt_type = "beacon";
4261 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4262 corrupt_type = "probe response";
bdcbd8e0
JB		 4263 sdata_info(sdata, "associating with AP with corrupt %s\n",
4264 corrupt_type);
fcff4f10
PS		 4265 }
4266
8d61ffa5 4267 return 0;
66e67e41 4268 err_clear:
3d2abdfd
EP		 4269 memset(ifmgd->bssid, 0, ETH_ALEN);
4270 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 4271 ifmgd->assoc_data = NULL;
4272 err_free:
4273 kfree(assoc_data);
66e67e41 4274 return err;
f0706e82
JB		 4275}
4276
77fdaa12 4277int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
63c9c5e7 4278 struct cfg80211_deauth_request *req)
f0706e82 4279{
46900298 4280 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 4281 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
6863255b 4282 bool tx = !req->local_state_change;
de3d43a3 4283 bool report_frame = false;
f0706e82 4284
bdcbd8e0
JB		 4285 sdata_info(sdata,
4286 "deauthenticating from %pM by local choice (reason=%d)\n",
4287 req->bssid, req->reason_code);
0ff71613 4288
86552017 4289 if (ifmgd->auth_data) {
8c7d857c 4290 drv_mgd_prepare_tx(sdata->local, sdata);
37ad3888
JB		 4291 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4292 IEEE80211_STYPE_DEAUTH,
6863255b 4293 req->reason_code, tx,
37ad3888 4294 frame_buf);
86552017 4295 ieee80211_destroy_auth_data(sdata, false);
86552017 4296
de3d43a3 4297 report_frame = true;
86552017 4298 goto out;
8c7d857c
EG		 4299 }
4300
86552017
JB		 4301 if (ifmgd->associated &&
4302 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
4303 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4304 req->reason_code, tx, frame_buf);
de3d43a3 4305 report_frame = true;
86552017 4306 }
37ad3888 4307
86552017 4308 out:
de3d43a3 4309 if (report_frame)
6ff57cf8
JB		 4310 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4311 IEEE80211_DEAUTH_FRAME_LEN);
86552017 4312
f0706e82
JB		 4313 return 0;
4314}
84363e6e 4315
77fdaa12 4316int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 4317 struct cfg80211_disassoc_request *req)
9c6bd790 4318{
77fdaa12 4319 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 4320 u8 bssid[ETH_ALEN];
6ae16775 4321 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
9c6bd790 4322
8d8b261a
JB		 4323 /*
4324 * cfg80211 should catch this ... but it's racy since
4325 * we can receive a disassoc frame, process it, hand it
4326 * to cfg80211 while that's in a locked section already
4327 * trying to tell us that the user wants to disconnect.
4328 */
8d61ffa5 4329 if (ifmgd->associated != req->bss)
77fdaa12 4330 return -ENOLINK;
77fdaa12 4331
bdcbd8e0
JB		 4332 sdata_info(sdata,
4333 "disassociating from %pM by local choice (reason=%d)\n",
4334 req->bss->bssid, req->reason_code);
0ff71613 4335
e69e95db 4336 memcpy(bssid, req->bss->bssid, ETH_ALEN);
37ad3888
JB		 4337 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4338 req->reason_code, !req->local_state_change,
4339 frame_buf);
10f644a4 4340
6ff57cf8
JB		 4341 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4342 IEEE80211_DEAUTH_FRAME_LEN);
bc83b681 4343
10f644a4
JB		 4344 return 0;
4345}
026331c4 4346
afa762f6 4347void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
54e4ffb2
JB		 4348{
4349 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4350
49921859
BG		 4351 /*
4352 * Make sure some work items will not run after this,
4353 * they will not do anything but might not have been
4354 * cancelled when disconnecting.
4355 */
4356 cancel_work_sync(&ifmgd->monitor_work);
4357 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
4358 cancel_work_sync(&ifmgd->request_smps_work);
4359 cancel_work_sync(&ifmgd->csa_connection_drop_work);
4360 cancel_work_sync(&ifmgd->chswitch_work);
4361
8d61ffa5 4362 sdata_lock(sdata);
959867fa
JB		 4363 if (ifmgd->assoc_data) {
4364 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
54e4ffb2 4365 ieee80211_destroy_assoc_data(sdata, false);
959867fa
JB		 4366 cfg80211_assoc_timeout(sdata->dev, bss);
4367 }
54e4ffb2
JB		 4368 if (ifmgd->auth_data)
4369 ieee80211_destroy_auth_data(sdata, false);
4370 del_timer_sync(&ifmgd->timer);
8d61ffa5 4371 sdata_unlock(sdata);
54e4ffb2
JB		 4372}
4373
a97c13c3
JO		 4374void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
4375 enum nl80211_cqm_rssi_threshold_event rssi_event,
4376 gfp_t gfp)
4377{
4378 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4379
b5878a2d
JB		 4380 trace_api_cqm_rssi_notify(sdata, rssi_event);
4381
a97c13c3
JO		 4382 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
4383}
4384EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
Linux kernel - Deliverables
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