]> git.proxmox.com Git - mirror_ubuntu-bionic-kernel.git/blame - net/mac80211/mlme.c
projects / mirror_ubuntu-bionic-kernel.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
mac80211_hwsim: Fix bcn_en_iter to use atomic iteration
[mirror_ubuntu-bionic-kernel.git] / net / mac80211 / mlme.c
CommitLineData
f0706e82
JB		 1/*
2 * BSS client mode implementation
5394af4d 3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
f0706e82
JB		 4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
5b323edb 14#include <linux/delay.h>
f0706e82
JB		 15#include <linux/if_ether.h>
16#include <linux/skbuff.h>
f0706e82 17#include <linux/if_arp.h>
f0706e82 18#include <linux/etherdevice.h>
d9b93842 19#include <linux/moduleparam.h>
d0709a65 20#include <linux/rtnetlink.h>
e8db0be1 21#include <linux/pm_qos.h>
d91f36db 22#include <linux/crc32.h>
5a0e3ad6 23#include <linux/slab.h>
bc3b2d7f 24#include <linux/export.h>
f0706e82 25#include <net/mac80211.h>
472dbc45 26#include <asm/unaligned.h>
60f8b39c 27
f0706e82 28#include "ieee80211_i.h"
24487981 29#include "driver-ops.h"
2c8dccc7
JB		 30#include "rate.h"
31#include "led.h"
f0706e82 32
1672c0e3 33#define IEEE80211_AUTH_TIMEOUT (HZ / 5)
cb236d2d 34#define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2)
1672c0e3
JB		 35#define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10)
36#define IEEE80211_AUTH_MAX_TRIES 3
37#define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
38#define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
cb236d2d 39#define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2)
1672c0e3
JB		 40#define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10)
41#define IEEE80211_ASSOC_MAX_TRIES 3
66e67e41 42
180205bd
BG		 43static int max_nullfunc_tries = 2;
44module_param(max_nullfunc_tries, int, 0644);
45MODULE_PARM_DESC(max_nullfunc_tries,
46 "Maximum nullfunc tx tries before disconnecting (reason 4).");
47
48static int max_probe_tries = 5;
49module_param(max_probe_tries, int, 0644);
50MODULE_PARM_DESC(max_probe_tries,
51 "Maximum probe tries before disconnecting (reason 4).");
b291ba11
JB		 52
53/*
7ccc8bd7
FF		 54 * Beacon loss timeout is calculated as N frames times the
55 * advertised beacon interval. This may need to be somewhat
56 * higher than what hardware might detect to account for
57 * delays in the host processing frames. But since we also
58 * probe on beacon miss before declaring the connection lost
59 * default to what we want.
b291ba11 60 */
59c1ec2b
BG		 61static int beacon_loss_count = 7;
62module_param(beacon_loss_count, int, 0644);
63MODULE_PARM_DESC(beacon_loss_count,
64 "Number of beacon intervals before we decide beacon was lost.");
7ccc8bd7 65
b291ba11
JB		 66/*
67 * Time the connection can be idle before we probe
68 * it to see if we can still talk to the AP.
69 */
d1c5091f 70#define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
b291ba11
JB		 71/*
72 * Time we wait for a probe response after sending
73 * a probe request because of beacon loss or for
74 * checking the connection still works.
75 */
180205bd
BG		 76static int probe_wait_ms = 500;
77module_param(probe_wait_ms, int, 0644);
78MODULE_PARM_DESC(probe_wait_ms,
79 "Maximum time(ms) to wait for probe response"
80 " before disconnecting (reason 4).");
f0706e82 81
17e4ec14
JM		 82/*
83 * Weight given to the latest Beacon frame when calculating average signal
84 * strength for Beacon frames received in the current BSS. This must be
85 * between 1 and 15.
86 */
87#define IEEE80211_SIGNAL_AVE_WEIGHT 3
88
391a200a
JM		 89/*
90 * How many Beacon frames need to have been used in average signal strength
91 * before starting to indicate signal change events.
92 */
93#define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
94
ca386f31
JB		 95/*
96 * We can have multiple work items (and connection probing)
97 * scheduling this timer, but we need to take care to only
98 * reschedule it when it should fire _earlier_ than it was
99 * asked for before, or if it's not pending right now. This
100 * function ensures that. Note that it then is required to
101 * run this function for all timeouts after the first one
102 * has happened -- the work that runs from this timer will
103 * do that.
104 */
8d61ffa5
JB		 105static void run_again(struct ieee80211_sub_if_data *sdata,
106 unsigned long timeout)
ca386f31 107{
8d61ffa5 108 sdata_assert_lock(sdata);
ca386f31 109
8d61ffa5
JB		 110 if (!timer_pending(&sdata->u.mgd.timer) ||
111 time_before(timeout, sdata->u.mgd.timer.expires))
112 mod_timer(&sdata->u.mgd.timer, timeout);
ca386f31
JB		 113}
114
d3a910a8 115void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
b291ba11 116{
c1288b12 117 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
b291ba11
JB		 118 return;
119
7eeff74c
JB		 120 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
121 return;
122
b291ba11 123 mod_timer(&sdata->u.mgd.bcn_mon_timer,
7ccc8bd7 124 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
b291ba11
JB		 125}
126
be099e82
LR		 127void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
128{
0c699c3a
LR		 129 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
130
8628172f
SG		 131 if (unlikely(!sdata->u.mgd.associated))
132 return;
133
be099e82
LR		 134 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
135 return;
136
137 mod_timer(&sdata->u.mgd.conn_mon_timer,
138 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
0c699c3a
LR		 139
140 ifmgd->probe_send_count = 0;
be099e82
LR		 141}
142
5484e237 143static int ecw2cw(int ecw)
60f8b39c 144{
5484e237 145 return (1 << ecw) - 1;
60f8b39c
JB		 146}
147
6565ec9b
JB		 148static u32
149ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
150 struct ieee80211_supported_band *sband,
151 struct ieee80211_channel *channel,
152 const struct ieee80211_ht_operation *ht_oper,
153 const struct ieee80211_vht_operation *vht_oper,
5cdaed1e 154 struct cfg80211_chan_def *chandef, bool tracking)
6565ec9b 155{
5cdaed1e 156 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6565ec9b
JB		 157 struct cfg80211_chan_def vht_chandef;
158 u32 ht_cfreq, ret;
159
160 chandef->chan = channel;
161 chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
162 chandef->center_freq1 = channel->center_freq;
163 chandef->center_freq2 = 0;
164
165 if (!ht_oper || !sband->ht_cap.ht_supported) {
166 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
167 goto out;
168 }
169
170 chandef->width = NL80211_CHAN_WIDTH_20;
171
172 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
173 channel->band);
174 /* check that channel matches the right operating channel */
5cdaed1e 175 if (!tracking && channel->center_freq != ht_cfreq) {
6565ec9b
JB		 176 /*
177 * It's possible that some APs are confused here;
178 * Netgear WNDR3700 sometimes reports 4 higher than
179 * the actual channel in association responses, but
180 * since we look at probe response/beacon data here
181 * it should be OK.
182 */
5cdaed1e
JB		 183 sdata_info(sdata,
184 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
185 channel->center_freq, ht_cfreq,
186 ht_oper->primary_chan, channel->band);
6565ec9b
JB		 187 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
188 goto out;
189 }
190
191 /* check 40 MHz support, if we have it */
192 if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
193 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
194 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
195 chandef->width = NL80211_CHAN_WIDTH_40;
196 chandef->center_freq1 += 10;
197 break;
198 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
199 chandef->width = NL80211_CHAN_WIDTH_40;
200 chandef->center_freq1 -= 10;
201 break;
202 }
203 } else {
204 /* 40 MHz (and 80 MHz) must be supported for VHT */
205 ret = IEEE80211_STA_DISABLE_VHT;
85220d71
JB		 206 /* also mark 40 MHz disabled */
207 ret |= IEEE80211_STA_DISABLE_40MHZ;
6565ec9b
JB		 208 goto out;
209 }
210
211 if (!vht_oper || !sband->vht_cap.vht_supported) {
212 ret = IEEE80211_STA_DISABLE_VHT;
213 goto out;
214 }
215
216 vht_chandef.chan = channel;
217 vht_chandef.center_freq1 =
218 ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx,
219 channel->band);
220 vht_chandef.center_freq2 = 0;
221
6565ec9b
JB		 222 switch (vht_oper->chan_width) {
223 case IEEE80211_VHT_CHANWIDTH_USE_HT:
224 vht_chandef.width = chandef->width;
225 break;
226 case IEEE80211_VHT_CHANWIDTH_80MHZ:
227 vht_chandef.width = NL80211_CHAN_WIDTH_80;
228 break;
229 case IEEE80211_VHT_CHANWIDTH_160MHZ:
230 vht_chandef.width = NL80211_CHAN_WIDTH_160;
231 break;
232 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
233 vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
6553bf04
JB		 234 vht_chandef.center_freq2 =
235 ieee80211_channel_to_frequency(
236 vht_oper->center_freq_seg2_idx,
237 channel->band);
6565ec9b
JB		 238 break;
239 default:
5cdaed1e 240 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
30eb1dc2
JB		 241 sdata_info(sdata,
242 "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
243 vht_oper->chan_width);
6565ec9b
JB		 244 ret = IEEE80211_STA_DISABLE_VHT;
245 goto out;
246 }
247
248 if (!cfg80211_chandef_valid(&vht_chandef)) {
5cdaed1e 249 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
30eb1dc2
JB		 250 sdata_info(sdata,
251 "AP VHT information is invalid, disable VHT\n");
6565ec9b
JB		 252 ret = IEEE80211_STA_DISABLE_VHT;
253 goto out;
254 }
255
256 if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
257 ret = 0;
258 goto out;
259 }
260
261 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
5cdaed1e 262 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
30eb1dc2
JB		 263 sdata_info(sdata,
264 "AP VHT information doesn't match HT, disable VHT\n");
6565ec9b
JB		 265 ret = IEEE80211_STA_DISABLE_VHT;
266 goto out;
267 }
268
269 *chandef = vht_chandef;
270
271 ret = 0;
272
273out:
586e01ed
JB		 274 /* don't print the message below for VHT mismatch if VHT is disabled */
275 if (ret & IEEE80211_STA_DISABLE_VHT)
276 vht_chandef = *chandef;
277
ddfe49b4
JB		 278 /*
279 * Ignore the DISABLED flag when we're already connected and only
280 * tracking the APs beacon for bandwidth changes - otherwise we
281 * might get disconnected here if we connect to an AP, update our
282 * regulatory information based on the AP's country IE and the
283 * information we have is wrong/outdated and disables the channel
284 * that we're actually using for the connection to the AP.
285 */
6565ec9b 286 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
ddfe49b4
JB		 287 tracking ? 0 :
288 IEEE80211_CHAN_DISABLED)) {
6565ec9b
JB		 289 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
290 ret = IEEE80211_STA_DISABLE_HT |
291 IEEE80211_STA_DISABLE_VHT;
b56e4b85 292 break;
6565ec9b
JB		 293 }
294
e6b7cde4 295 ret |= ieee80211_chandef_downgrade(chandef);
6565ec9b
JB		 296 }
297
5cdaed1e 298 if (chandef->width != vht_chandef.width && !tracking)
6565ec9b
JB		 299 sdata_info(sdata,
300 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
301
302 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
303 return ret;
304}
305
30eb1dc2
JB		 306static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
307 struct sta_info *sta,
308 const struct ieee80211_ht_operation *ht_oper,
309 const struct ieee80211_vht_operation *vht_oper,
310 const u8 *bssid, u32 *changed)
d5522e03
JB		 311{
312 struct ieee80211_local *local = sdata->local;
30eb1dc2 313 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d5522e03 314 struct ieee80211_supported_band *sband;
55de908a 315 struct ieee80211_channel *chan;
30eb1dc2 316 struct cfg80211_chan_def chandef;
9ed6bcce 317 u16 ht_opmode;
30eb1dc2
JB		 318 u32 flags;
319 enum ieee80211_sta_rx_bandwidth new_sta_bw;
320 int ret;
d5522e03 321
30eb1dc2
JB		 322 /* if HT was/is disabled, don't track any bandwidth changes */
323 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
1128958d
JB		 324 return 0;
325
30eb1dc2
JB		 326 /* don't check VHT if we associated as non-VHT station */
327 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
328 vht_oper = NULL;
329
330 if (WARN_ON_ONCE(!sta))
331 return -EINVAL;
332
f2d9330e 333 chan = sdata->vif.bss_conf.chandef.chan;
55de908a 334 sband = local->hw.wiphy->bands[chan->band];
d5522e03 335
30eb1dc2
JB		 336 /* calculate new channel (type) based on HT/VHT operation IEs */
337 flags = ieee80211_determine_chantype(sdata, sband, chan, ht_oper,
5cdaed1e 338 vht_oper, &chandef, true);
30eb1dc2
JB		 339
340 /*
341 * Downgrade the new channel if we associated with restricted
342 * capabilities. For example, if we associated as a 20 MHz STA
343 * to a 40 MHz AP (due to regulatory, capabilities or config
344 * reasons) then switching to a 40 MHz channel now won't do us
345 * any good -- we couldn't use it with the AP.
346 */
347 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
348 chandef.width == NL80211_CHAN_WIDTH_80P80)
e6b7cde4 349 flags |= ieee80211_chandef_downgrade(&chandef);
30eb1dc2
JB		 350 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
351 chandef.width == NL80211_CHAN_WIDTH_160)
e6b7cde4 352 flags |= ieee80211_chandef_downgrade(&chandef);
30eb1dc2
JB		 353 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
354 chandef.width > NL80211_CHAN_WIDTH_20)
e6b7cde4 355 flags |= ieee80211_chandef_downgrade(&chandef);
30eb1dc2
JB		 356
357 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
358 return 0;
359
360 sdata_info(sdata,
361 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
362 ifmgd->bssid, chandef.chan->center_freq, chandef.width,
363 chandef.center_freq1, chandef.center_freq2);
364
365 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
366 IEEE80211_STA_DISABLE_VHT |
367 IEEE80211_STA_DISABLE_40MHZ |
368 IEEE80211_STA_DISABLE_80P80MHZ |
369 IEEE80211_STA_DISABLE_160MHZ)) ||
370 !cfg80211_chandef_valid(&chandef)) {
371 sdata_info(sdata,
372 "AP %pM changed bandwidth in a way we can't support - disconnect\n",
373 ifmgd->bssid);
374 return -EINVAL;
375 }
376
377 switch (chandef.width) {
378 case NL80211_CHAN_WIDTH_20_NOHT:
379 case NL80211_CHAN_WIDTH_20:
380 new_sta_bw = IEEE80211_STA_RX_BW_20;
381 break;
4bf88530 382 case NL80211_CHAN_WIDTH_40:
30eb1dc2 383 new_sta_bw = IEEE80211_STA_RX_BW_40;
64f68e5d 384 break;
30eb1dc2
JB		 385 case NL80211_CHAN_WIDTH_80:
386 new_sta_bw = IEEE80211_STA_RX_BW_80;
387 break;
388 case NL80211_CHAN_WIDTH_80P80:
389 case NL80211_CHAN_WIDTH_160:
390 new_sta_bw = IEEE80211_STA_RX_BW_160;
64f68e5d 391 break;
30eb1dc2
JB		 392 default:
393 return -EINVAL;
64f68e5d 394 }
d5522e03 395
30eb1dc2
JB		 396 if (new_sta_bw > sta->cur_max_bandwidth)
397 new_sta_bw = sta->cur_max_bandwidth;
64f68e5d 398
30eb1dc2
JB		 399 if (new_sta_bw < sta->sta.bandwidth) {
400 sta->sta.bandwidth = new_sta_bw;
401 rate_control_rate_update(local, sband, sta,
402 IEEE80211_RC_BW_CHANGED);
403 }
64f68e5d 404
30eb1dc2
JB		 405 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
406 if (ret) {
407 sdata_info(sdata,
408 "AP %pM changed bandwidth to incompatible one - disconnect\n",
409 ifmgd->bssid);
410 return ret;
411 }
7cc44ed4 412
30eb1dc2
JB		 413 if (new_sta_bw > sta->sta.bandwidth) {
414 sta->sta.bandwidth = new_sta_bw;
415 rate_control_rate_update(local, sband, sta,
416 IEEE80211_RC_BW_CHANGED);
0aaffa9b 417 }
d5522e03 418
074d46d1 419 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
d5522e03
JB		 420
421 /* if bss configuration changed store the new one */
30eb1dc2
JB		 422 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
423 *changed |= BSS_CHANGED_HT;
9ed6bcce 424 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
d5522e03
JB		 425 }
426
30eb1dc2 427 return 0;
d5522e03
JB		 428}
429
9c6bd790
JB		 430/* frame sending functions */
431
66e67e41 432static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
9dde6423 433 struct sk_buff *skb, u8 ap_ht_param,
66e67e41
JB		 434 struct ieee80211_supported_band *sband,
435 struct ieee80211_channel *channel,
436 enum ieee80211_smps_mode smps)
437{
66e67e41
JB		 438 u8 *pos;
439 u32 flags = channel->flags;
440 u16 cap;
441 struct ieee80211_sta_ht_cap ht_cap;
442
443 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
444
66e67e41
JB		 445 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
446 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
447
66e67e41
JB		 448 /* determine capability flags */
449 cap = ht_cap.cap;
450
9dde6423 451 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
66e67e41
JB		 452 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
453 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
454 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
455 cap &= ~IEEE80211_HT_CAP_SGI_40;
456 }
457 break;
458 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
459 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
460 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
461 cap &= ~IEEE80211_HT_CAP_SGI_40;
462 }
463 break;
464 }
465
24398e39
JB		 466 /*
467 * If 40 MHz was disabled associate as though we weren't
468 * capable of 40 MHz -- some broken APs will never fall
469 * back to trying to transmit in 20 MHz.
470 */
471 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
472 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
473 cap &= ~IEEE80211_HT_CAP_SGI_40;
474 }
475
66e67e41
JB		 476 /* set SM PS mode properly */
477 cap &= ~IEEE80211_HT_CAP_SM_PS;
478 switch (smps) {
479 case IEEE80211_SMPS_AUTOMATIC:
480 case IEEE80211_SMPS_NUM_MODES:
481 WARN_ON(1);
482 case IEEE80211_SMPS_OFF:
483 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
484 IEEE80211_HT_CAP_SM_PS_SHIFT;
485 break;
486 case IEEE80211_SMPS_STATIC:
487 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
488 IEEE80211_HT_CAP_SM_PS_SHIFT;
489 break;
490 case IEEE80211_SMPS_DYNAMIC:
491 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
492 IEEE80211_HT_CAP_SM_PS_SHIFT;
493 break;
494 }
495
496 /* reserve and fill IE */
497 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
498 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
499}
500
d545daba
MP		 501static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
502 struct sk_buff *skb,
b08fbbd8
JB		 503 struct ieee80211_supported_band *sband,
504 struct ieee80211_vht_cap *ap_vht_cap)
d545daba
MP		 505{
506 u8 *pos;
507 u32 cap;
508 struct ieee80211_sta_vht_cap vht_cap;
509
510 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
511
512 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
dd5ecfea 513 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
d545daba
MP		 514
515 /* determine capability flags */
516 cap = vht_cap.cap;
517
f2d9d270
JB		 518 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
519 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ;
520 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
521 }
522
523 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
524 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
525 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
526 }
527
b08fbbd8
JB		 528 /*
529 * Some APs apparently get confused if our capabilities are better
530 * than theirs, so restrict what we advertise in the assoc request.
531 */
532 if (!(ap_vht_cap->vht_cap_info &
533 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
534 cap &= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE;
535
d545daba 536 /* reserve and fill IE */
d4950281 537 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
d545daba
MP		 538 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
539}
540
66e67e41
JB		 541static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
542{
543 struct ieee80211_local *local = sdata->local;
544 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
545 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
546 struct sk_buff *skb;
547 struct ieee80211_mgmt *mgmt;
548 u8 *pos, qos_info;
549 size_t offset = 0, noffset;
2103dec1 550 int i, count, rates_len, supp_rates_len, shift;
66e67e41
JB		 551 u16 capab;
552 struct ieee80211_supported_band *sband;
55de908a
JB		 553 struct ieee80211_chanctx_conf *chanctx_conf;
554 struct ieee80211_channel *chan;
2103dec1 555 u32 rate_flags, rates = 0;
66e67e41 556
8d61ffa5 557 sdata_assert_lock(sdata);
66e67e41 558
55de908a
JB		 559 rcu_read_lock();
560 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
561 if (WARN_ON(!chanctx_conf)) {
562 rcu_read_unlock();
563 return;
564 }
4bf88530 565 chan = chanctx_conf->def.chan;
2103dec1 566 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
55de908a
JB		 567 rcu_read_unlock();
568 sband = local->hw.wiphy->bands[chan->band];
2103dec1 569 shift = ieee80211_vif_get_shift(&sdata->vif);
66e67e41
JB		 570
571 if (assoc_data->supp_rates_len) {
572 /*
573 * Get all rates supported by the device and the AP as
574 * some APs don't like getting a superset of their rates
575 * in the association request (e.g. D-Link DAP 1353 in
576 * b-only mode)...
577 */
2103dec1
SW		 578 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
579 assoc_data->supp_rates,
580 assoc_data->supp_rates_len,
581 &rates);
66e67e41
JB		 582 } else {
583 /*
584 * In case AP not provide any supported rates information
585 * before association, we send information element(s) with
586 * all rates that we support.
587 */
2103dec1
SW		 588 rates_len = 0;
589 for (i = 0; i < sband->n_bitrates; i++) {
590 if ((rate_flags & sband->bitrates[i].flags)
591 != rate_flags)
592 continue;
593 rates |= BIT(i);
594 rates_len++;
595 }
66e67e41
JB		 596 }
597
598 skb = alloc_skb(local->hw.extra_tx_headroom +
599 sizeof(*mgmt) + /* bit too much but doesn't matter */
600 2 + assoc_data->ssid_len + /* SSID */
601 4 + rates_len + /* (extended) rates */
602 4 + /* power capability */
603 2 + 2 * sband->n_channels + /* supported channels */
604 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
d4950281 605 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
66e67e41
JB		 606 assoc_data->ie_len + /* extra IEs */
607 9, /* WMM */
608 GFP_KERNEL);
609 if (!skb)
610 return;
611
612 skb_reserve(skb, local->hw.extra_tx_headroom);
613
614 capab = WLAN_CAPABILITY_ESS;
615
616 if (sband->band == IEEE80211_BAND_2GHZ) {
617 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
618 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
619 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
620 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
621 }
622
623 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
624 capab |= WLAN_CAPABILITY_PRIVACY;
625
626 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
627 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
628 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
629
630 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
631 memset(mgmt, 0, 24);
632 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
633 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
634 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
635
636 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
637 skb_put(skb, 10);
638 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
639 IEEE80211_STYPE_REASSOC_REQ);
640 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
641 mgmt->u.reassoc_req.listen_interval =
642 cpu_to_le16(local->hw.conf.listen_interval);
643 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
644 ETH_ALEN);
645 } else {
646 skb_put(skb, 4);
647 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
648 IEEE80211_STYPE_ASSOC_REQ);
649 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
650 mgmt->u.assoc_req.listen_interval =
651 cpu_to_le16(local->hw.conf.listen_interval);
652 }
653
654 /* SSID */
655 pos = skb_put(skb, 2 + assoc_data->ssid_len);
656 *pos++ = WLAN_EID_SSID;
657 *pos++ = assoc_data->ssid_len;
658 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
659
660 /* add all rates which were marked to be used above */
661 supp_rates_len = rates_len;
662 if (supp_rates_len > 8)
663 supp_rates_len = 8;
664
665 pos = skb_put(skb, supp_rates_len + 2);
666 *pos++ = WLAN_EID_SUPP_RATES;
667 *pos++ = supp_rates_len;
668
669 count = 0;
670 for (i = 0; i < sband->n_bitrates; i++) {
671 if (BIT(i) & rates) {
2103dec1
SW		 672 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
673 5 * (1 << shift));
674 *pos++ = (u8) rate;
66e67e41
JB		 675 if (++count == 8)
676 break;
677 }
678 }
679
680 if (rates_len > count) {
681 pos = skb_put(skb, rates_len - count + 2);
682 *pos++ = WLAN_EID_EXT_SUPP_RATES;
683 *pos++ = rates_len - count;
684
685 for (i++; i < sband->n_bitrates; i++) {
686 if (BIT(i) & rates) {
2103dec1
SW		 687 int rate;
688 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
689 5 * (1 << shift));
690 *pos++ = (u8) rate;
66e67e41
JB		 691 }
692 }
693 }
694
695 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
696 /* 1. power capabilities */
697 pos = skb_put(skb, 4);
698 *pos++ = WLAN_EID_PWR_CAPABILITY;
699 *pos++ = 2;
700 *pos++ = 0; /* min tx power */
0430c883
SW		 701 /* max tx power */
702 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
66e67e41
JB		 703
704 /* 2. supported channels */
705 /* TODO: get this in reg domain format */
706 pos = skb_put(skb, 2 * sband->n_channels + 2);
707 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
708 *pos++ = 2 * sband->n_channels;
709 for (i = 0; i < sband->n_channels; i++) {
710 *pos++ = ieee80211_frequency_to_channel(
711 sband->channels[i].center_freq);
712 *pos++ = 1; /* one channel in the subband*/
713 }
714 }
715
716 /* if present, add any custom IEs that go before HT */
717 if (assoc_data->ie_len && assoc_data->ie) {
718 static const u8 before_ht[] = {
719 WLAN_EID_SSID,
720 WLAN_EID_SUPP_RATES,
721 WLAN_EID_EXT_SUPP_RATES,
722 WLAN_EID_PWR_CAPABILITY,
723 WLAN_EID_SUPPORTED_CHANNELS,
724 WLAN_EID_RSN,
725 WLAN_EID_QOS_CAPA,
726 WLAN_EID_RRM_ENABLED_CAPABILITIES,
727 WLAN_EID_MOBILITY_DOMAIN,
728 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
729 };
730 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
731 before_ht, ARRAY_SIZE(before_ht),
732 offset);
733 pos = skb_put(skb, noffset - offset);
734 memcpy(pos, assoc_data->ie + offset, noffset - offset);
735 offset = noffset;
736 }
737
f2d9d270
JB		 738 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
739 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
740 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
741
a8243b72 742 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
9dde6423 743 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
04ecd257 744 sband, chan, sdata->smps_mode);
66e67e41 745
d545daba 746 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
b08fbbd8
JB		 747 ieee80211_add_vht_ie(sdata, skb, sband,
748 &assoc_data->ap_vht_cap);
d545daba 749
66e67e41
JB		 750 /* if present, add any custom non-vendor IEs that go after HT */
751 if (assoc_data->ie_len && assoc_data->ie) {
752 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
753 assoc_data->ie_len,
754 offset);
755 pos = skb_put(skb, noffset - offset);
756 memcpy(pos, assoc_data->ie + offset, noffset - offset);
757 offset = noffset;
758 }
759
76f0303d
JB		 760 if (assoc_data->wmm) {
761 if (assoc_data->uapsd) {
dc41e4d4
EP		 762 qos_info = ifmgd->uapsd_queues;
763 qos_info |= (ifmgd->uapsd_max_sp_len <<
66e67e41
JB		 764 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
765 } else {
766 qos_info = 0;
767 }
768
769 pos = skb_put(skb, 9);
770 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
771 *pos++ = 7; /* len */
772 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
773 *pos++ = 0x50;
774 *pos++ = 0xf2;
775 *pos++ = 2; /* WME */
776 *pos++ = 0; /* WME info */
777 *pos++ = 1; /* WME ver */
778 *pos++ = qos_info;
779 }
780
781 /* add any remaining custom (i.e. vendor specific here) IEs */
782 if (assoc_data->ie_len && assoc_data->ie) {
783 noffset = assoc_data->ie_len;
784 pos = skb_put(skb, noffset - offset);
785 memcpy(pos, assoc_data->ie + offset, noffset - offset);
786 }
787
a1845fc7
JB		 788 drv_mgd_prepare_tx(local, sdata);
789
66e67e41 790 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1672c0e3
JB		 791 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
792 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
793 IEEE80211_TX_INTFL_MLME_CONN_TX;
66e67e41
JB		 794 ieee80211_tx_skb(sdata, skb);
795}
796
572e0012
KV		 797void ieee80211_send_pspoll(struct ieee80211_local *local,
798 struct ieee80211_sub_if_data *sdata)
799{
572e0012
KV		 800 struct ieee80211_pspoll *pspoll;
801 struct sk_buff *skb;
572e0012 802
d8cd189e
KV		 803 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
804 if (!skb)
572e0012 805 return;
572e0012 806
d8cd189e
KV		 807 pspoll = (struct ieee80211_pspoll *) skb->data;
808 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
572e0012 809
62ae67be
JB		 810 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
811 ieee80211_tx_skb(sdata, skb);
572e0012
KV		 812}
813
965bedad
JB		 814void ieee80211_send_nullfunc(struct ieee80211_local *local,
815 struct ieee80211_sub_if_data *sdata,
816 int powersave)
817{
818 struct sk_buff *skb;
d8cd189e 819 struct ieee80211_hdr_3addr *nullfunc;
b6f35301 820 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
965bedad 821
d8cd189e
KV		 822 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
823 if (!skb)
965bedad 824 return;
965bedad 825
d8cd189e 826 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
965bedad 827 if (powersave)
d8cd189e 828 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
965bedad 829
6c17b77b
SF		 830 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
831 IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
ff40b425
PF		 832
833 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
834 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
835
392b9ffb 836 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
b6f35301
RM		 837 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
838
62ae67be 839 ieee80211_tx_skb(sdata, skb);
965bedad
JB		 840}
841
d524215f
FF		 842static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
843 struct ieee80211_sub_if_data *sdata)
844{
845 struct sk_buff *skb;
846 struct ieee80211_hdr *nullfunc;
847 __le16 fc;
848
849 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
850 return;
851
852 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
d15b8459 853 if (!skb)
d524215f 854 return;
d15b8459 855
d524215f
FF		 856 skb_reserve(skb, local->hw.extra_tx_headroom);
857
858 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
859 memset(nullfunc, 0, 30);
860 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
861 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
862 nullfunc->frame_control = fc;
863 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
864 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
865 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
866 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
867
868 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
869 ieee80211_tx_skb(sdata, skb);
870}
871
cc32abd4
JB		 872/* spectrum management related things */
873static void ieee80211_chswitch_work(struct work_struct *work)
874{
875 struct ieee80211_sub_if_data *sdata =
876 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
675a0b04 877 struct ieee80211_local *local = sdata->local;
cc32abd4 878 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
7578d575
AN		 879 u32 changed = 0;
880 int ret;
cc32abd4 881
9607e6b6 882 if (!ieee80211_sdata_running(sdata))
cc32abd4
JB		 883 return;
884
8d61ffa5 885 sdata_lock(sdata);
77fdaa12
JB		 886 if (!ifmgd->associated)
887 goto out;
cc32abd4 888
7578d575
AN		 889 ret = ieee80211_vif_change_channel(sdata, &local->csa_chandef,
890 &changed);
891 if (ret) {
892 sdata_info(sdata,
893 "vif channel switch failed, disconnecting\n");
894 ieee80211_queue_work(&sdata->local->hw,
895 &ifmgd->csa_connection_drop_work);
896 goto out;
897 }
675a0b04 898
7578d575
AN		 899 if (!local->use_chanctx) {
900 local->_oper_chandef = local->csa_chandef;
901 /* Call "hw_config" only if doing sw channel switch.
902 * Otherwise update the channel directly
903 */
904 if (!local->ops->channel_switch)
905 ieee80211_hw_config(local, 0);
906 else
907 local->hw.conf.chandef = local->_oper_chandef;
5ce6e438 908 }
77fdaa12 909
cc32abd4 910 /* XXX: shouldn't really modify cfg80211-owned data! */
7578d575 911 ifmgd->associated->channel = local->csa_chandef.chan;
cc32abd4 912
57eebdf3 913 /* XXX: wait for a beacon first? */
675a0b04 914 ieee80211_wake_queues_by_reason(&local->hw,
445ea4e8 915 IEEE80211_MAX_QUEUE_MAP,
cc32abd4 916 IEEE80211_QUEUE_STOP_REASON_CSA);
7578d575
AN		 917
918 ieee80211_bss_info_change_notify(sdata, changed);
919
77fdaa12 920 out:
7578d575 921 sdata->vif.csa_active = false;
77fdaa12 922 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
8d61ffa5 923 sdata_unlock(sdata);
cc32abd4
JB		 924}
925
5ce6e438
JB		 926void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
927{
55de908a
JB		 928 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
929 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5ce6e438
JB		 930
931 trace_api_chswitch_done(sdata, success);
932 if (!success) {
882a7c69
JB		 933 sdata_info(sdata,
934 "driver channel switch failed, disconnecting\n");
935 ieee80211_queue_work(&sdata->local->hw,
936 &ifmgd->csa_connection_drop_work);
937 } else {
938 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
5ce6e438 939 }
5ce6e438
JB		 940}
941EXPORT_SYMBOL(ieee80211_chswitch_done);
942
cc32abd4
JB		 943static void ieee80211_chswitch_timer(unsigned long data)
944{
945 struct ieee80211_sub_if_data *sdata =
946 (struct ieee80211_sub_if_data *) data;
5bb644a0 947
9b7d72c1 948 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
cc32abd4
JB		 949}
950
37799e52 951static void
4a3cb702 952ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
04a161f4
JB		 953 u64 timestamp, struct ieee802_11_elems *elems,
954 bool beacon)
cc32abd4 955{
b4f286a1 956 struct ieee80211_local *local = sdata->local;
cc32abd4 957 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
37799e52 958 struct cfg80211_bss *cbss = ifmgd->associated;
55de908a 959 struct ieee80211_chanctx *chanctx;
e6b7cde4 960 enum ieee80211_band current_band;
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);
1401
1402 ieee80211_vif_release_channel(sdata);
1403
1404 cfg80211_cac_event(sdata->dev, NL80211_RADAR_CAC_FINISHED, GFP_KERNEL);
1405}
1406
60f8b39c 1407/* MLME */
7d25745d 1408static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
4ced3f74 1409 struct ieee80211_sub_if_data *sdata,
4a3cb702 1410 const u8 *wmm_param, size_t wmm_param_len)
f0706e82 1411{
f0706e82 1412 struct ieee80211_tx_queue_params params;
4ced3f74 1413 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1414 size_t left;
1415 int count;
4a3cb702
JB		 1416 const u8 *pos;
1417 u8 uapsd_queues = 0;
f0706e82 1418
e1b3ec1a 1419 if (!local->ops->conf_tx)
7d25745d 1420 return false;
e1b3ec1a 1421
32c5057b 1422 if (local->hw.queues < IEEE80211_NUM_ACS)
7d25745d 1423 return false;
3434fbd3
JB		 1424
1425 if (!wmm_param)
7d25745d 1426 return false;
3434fbd3 1427
f0706e82 1428 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
7d25745d 1429 return false;
ab13315a
KV		 1430
1431 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
dc41e4d4 1432 uapsd_queues = ifmgd->uapsd_queues;
ab13315a 1433
f0706e82 1434 count = wmm_param[6] & 0x0f;
46900298 1435 if (count == ifmgd->wmm_last_param_set)
7d25745d 1436 return false;
46900298 1437 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 1438
1439 pos = wmm_param + 8;
1440 left = wmm_param_len - 8;
1441
1442 memset(&params, 0, sizeof(params));
1443
00e96dec 1444 sdata->wmm_acm = 0;
f0706e82
JB		 1445 for (; left >= 4; left -= 4, pos += 4) {
1446 int aci = (pos[0] >> 5) & 0x03;
1447 int acm = (pos[0] >> 4) & 0x01;
ab13315a 1448 bool uapsd = false;
f0706e82
JB		 1449 int queue;
1450
1451 switch (aci) {
0eeb59fe 1452 case 1: /* AC_BK */
e100bb64 1453 queue = 3;
988c0f72 1454 if (acm)
00e96dec 1455 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV		 1456 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1457 uapsd = true;
f0706e82 1458 break;
0eeb59fe 1459 case 2: /* AC_VI */
e100bb64 1460 queue = 1;
988c0f72 1461 if (acm)
00e96dec 1462 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV		 1463 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1464 uapsd = true;
f0706e82 1465 break;
0eeb59fe 1466 case 3: /* AC_VO */
e100bb64 1467 queue = 0;
988c0f72 1468 if (acm)
00e96dec 1469 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV		 1470 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1471 uapsd = true;
f0706e82 1472 break;
0eeb59fe 1473 case 0: /* AC_BE */
f0706e82 1474 default:
e100bb64 1475 queue = 2;
988c0f72 1476 if (acm)
00e96dec 1477 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV		 1478 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1479 uapsd = true;
f0706e82
JB		 1480 break;
1481 }
1482
1483 params.aifs = pos[0] & 0x0f;
1484 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1485 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 1486 params.txop = get_unaligned_le16(pos + 2);
908f8d07 1487 params.acm = acm;
ab13315a
KV		 1488 params.uapsd = uapsd;
1489
bdcbd8e0
JB		 1490 mlme_dbg(sdata,
1491 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1492 queue, aci, acm,
1493 params.aifs, params.cw_min, params.cw_max,
1494 params.txop, params.uapsd);
f6f3def3
EP		 1495 sdata->tx_conf[queue] = params;
1496 if (drv_conf_tx(local, sdata, queue, &params))
bdcbd8e0
JB		 1497 sdata_err(sdata,
1498 "failed to set TX queue parameters for queue %d\n",
1499 queue);
f0706e82 1500 }
e1b3ec1a
SG		 1501
1502 /* enable WMM or activate new settings */
4ced3f74 1503 sdata->vif.bss_conf.qos = true;
7d25745d 1504 return true;
f0706e82
JB		 1505}
1506
925e64c3
SG		 1507static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1508{
1509 lockdep_assert_held(&sdata->local->mtx);
1510
392b9ffb 1511 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
925e64c3
SG		 1512 ieee80211_run_deferred_scan(sdata->local);
1513}
1514
1515static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1516{
1517 mutex_lock(&sdata->local->mtx);
1518 __ieee80211_stop_poll(sdata);
1519 mutex_unlock(&sdata->local->mtx);
1520}
1521
7a5158ef
JB		 1522static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1523 u16 capab, bool erp_valid, u8 erp)
5628221c 1524{
bda3933a 1525 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 1526 u32 changed = 0;
7a5158ef
JB		 1527 bool use_protection;
1528 bool use_short_preamble;
1529 bool use_short_slot;
1530
1531 if (erp_valid) {
1532 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1533 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1534 } else {
1535 use_protection = false;
1536 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1537 }
1538
1539 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
55de908a 1540 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
43d35343 1541 use_short_slot = true;
5628221c 1542
471b3efd 1543 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 1544 bss_conf->use_cts_prot = use_protection;
1545 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 1546 }
7e9ed188 1547
d43c7b37 1548 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 1549 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 1550 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 1551 }
d9430a32 1552
7a5158ef 1553 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 1554 bss_conf->use_short_slot = use_short_slot;
1555 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 1556 }
1557
1558 return changed;
1559}
1560
f698d856 1561static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 1562 struct cfg80211_bss *cbss,
ae5eb026 1563 u32 bss_info_changed)
f0706e82 1564{
0c1ad2ca 1565 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 1566 struct ieee80211_local *local = sdata->local;
68542962 1567 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
d6f2da5b 1568
ae5eb026 1569 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 1570 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
50ae34a2 1571 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 1572
7ccc8bd7 1573 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
59c1ec2b 1574 beacon_loss_count * bss_conf->beacon_int));
7ccc8bd7 1575
0c1ad2ca
JB		 1576 sdata->u.mgd.associated = cbss;
1577 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 1578
17e4ec14
JM		 1579 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1580
488dd7b5 1581 if (sdata->vif.p2p) {
9caf0364 1582 const struct cfg80211_bss_ies *ies;
488dd7b5 1583
9caf0364
JB		 1584 rcu_read_lock();
1585 ies = rcu_dereference(cbss->ies);
1586 if (ies) {
9caf0364
JB		 1587 int ret;
1588
1589 ret = cfg80211_get_p2p_attr(
1590 ies->data, ies->len,
1591 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
67baf663
JD		 1592 (u8 *) &bss_conf->p2p_noa_attr,
1593 sizeof(bss_conf->p2p_noa_attr));
9caf0364 1594 if (ret >= 2) {
67baf663
JD		 1595 sdata->u.mgd.p2p_noa_index =
1596 bss_conf->p2p_noa_attr.index;
9caf0364 1597 bss_info_changed |= BSS_CHANGED_P2P_PS;
9caf0364 1598 }
488dd7b5 1599 }
9caf0364 1600 rcu_read_unlock();
488dd7b5
JB		 1601 }
1602
b291ba11 1603 /* just to be sure */
925e64c3 1604 ieee80211_stop_poll(sdata);
b291ba11 1605
9ac19a90 1606 ieee80211_led_assoc(local, 1);
9306102e 1607
989c6505 1608 if (sdata->u.mgd.have_beacon) {
826262c3
JB		 1609 /*
1610 * If the AP is buggy we may get here with no DTIM period
1611 * known, so assume it's 1 which is the only safe assumption
1612 * in that case, although if the TIM IE is broken powersave
1613 * probably just won't work at all.
1614 */
1615 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
817cee76 1616 bss_conf->beacon_rate = bss->beacon_rate;
989c6505 1617 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
826262c3 1618 } else {
817cee76 1619 bss_conf->beacon_rate = NULL;
e5b900d2 1620 bss_conf->dtim_period = 0;
826262c3 1621 }
e5b900d2 1622
68542962 1623 bss_conf->assoc = 1;
9cef8737 1624
a97c13c3 1625 /* Tell the driver to monitor connection quality (if supported) */
ea086359 1626 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
68542962 1627 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 1628 bss_info_changed |= BSS_CHANGED_CQM;
1629
68542962 1630 /* Enable ARP filtering */
0f19b41e 1631 if (bss_conf->arp_addr_cnt)
68542962 1632 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
68542962 1633
ae5eb026 1634 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 1635
056508dc
JB		 1636 mutex_lock(&local->iflist_mtx);
1637 ieee80211_recalc_ps(local, -1);
1638 mutex_unlock(&local->iflist_mtx);
e0cb686f 1639
04ecd257 1640 ieee80211_recalc_smps(sdata);
ab095877
EP		 1641 ieee80211_recalc_ps_vif(sdata);
1642
9ac19a90 1643 netif_carrier_on(sdata->dev);
f0706e82
JB		 1644}
1645
e69e95db 1646static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
37ad3888
JB		 1647 u16 stype, u16 reason, bool tx,
1648 u8 *frame_buf)
aa458d17 1649{
46900298 1650 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17 1651 struct ieee80211_local *local = sdata->local;
3cc5240b 1652 u32 changed = 0;
aa458d17 1653
8d61ffa5 1654 sdata_assert_lock(sdata);
77fdaa12 1655
37ad3888
JB		 1656 if (WARN_ON_ONCE(tx && !frame_buf))
1657 return;
1658
b291ba11
JB		 1659 if (WARN_ON(!ifmgd->associated))
1660 return;
1661
79543d8e
DS		 1662 ieee80211_stop_poll(sdata);
1663
77fdaa12 1664 ifmgd->associated = NULL;
aa458d17
TW		 1665 netif_carrier_off(sdata->dev);
1666
88bc40e8
EP		 1667 /*
1668 * if we want to get out of ps before disassoc (why?) we have
1669 * to do it before sending disassoc, as otherwise the null-packet
1670 * won't be valid.
1671 */
1672 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1673 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1674 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1675 }
1676 local->ps_sdata = NULL;
1677
ab095877
EP		 1678 /* disable per-vif ps */
1679 ieee80211_recalc_ps_vif(sdata);
1680
f823981e
EP		 1681 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1682 if (tx)
39ecc01d 1683 ieee80211_flush_queues(local, sdata);
f823981e 1684
37ad3888
JB		 1685 /* deauthenticate/disassociate now */
1686 if (tx || frame_buf)
88a9e31c
EP		 1687 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
1688 reason, tx, frame_buf);
37ad3888
JB		 1689
1690 /* flush out frame */
1691 if (tx)
39ecc01d 1692 ieee80211_flush_queues(local, sdata);
37ad3888 1693
88a9e31c
EP		 1694 /* clear bssid only after building the needed mgmt frames */
1695 memset(ifmgd->bssid, 0, ETH_ALEN);
1696
37ad3888 1697 /* remove AP and TDLS peers */
051007d9 1698 sta_info_flush_defer(sdata);
37ad3888
JB		 1699
1700 /* finally reset all BSS / config parameters */
f5e5bf25
TW		 1701 changed |= ieee80211_reset_erp_info(sdata);
1702
f5e5bf25 1703 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 1704 changed |= BSS_CHANGED_ASSOC;
1705 sdata->vif.bss_conf.assoc = false;
f5e5bf25 1706
67baf663
JD		 1707 ifmgd->p2p_noa_index = -1;
1708 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
1709 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
488dd7b5 1710
dd5ecfea 1711 /* on the next assoc, re-program HT/VHT parameters */
ef96a842
BG		 1712 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1713 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
dd5ecfea
JB		 1714 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
1715 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
413ad50a 1716
1ea6f9c0 1717 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
a8302de9 1718
520eb820
KV		 1719 del_timer_sync(&local->dynamic_ps_timer);
1720 cancel_work_sync(&local->dynamic_ps_enable_work);
1721
68542962 1722 /* Disable ARP filtering */
0f19b41e 1723 if (sdata->vif.bss_conf.arp_addr_cnt)
68542962 1724 changed |= BSS_CHANGED_ARP_FILTER;
68542962 1725
3abead59
JB		 1726 sdata->vif.bss_conf.qos = false;
1727 changed |= BSS_CHANGED_QOS;
1728
0aaffa9b
JB		 1729 /* The BSSID (not really interesting) and HT changed */
1730 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 1731 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 1732
3abead59
JB		 1733 /* disassociated - set to defaults now */
1734 ieee80211_set_wmm_default(sdata, false);
1735
b9dcf712
JB		 1736 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1737 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1738 del_timer_sync(&sdata->u.mgd.timer);
1739 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2d9957cc 1740
826262c3 1741 sdata->vif.bss_conf.dtim_period = 0;
817cee76
AB		 1742 sdata->vif.bss_conf.beacon_rate = NULL;
1743
989c6505 1744 ifmgd->have_beacon = false;
826262c3 1745
028e8da0
JB		 1746 ifmgd->flags = 0;
1747 ieee80211_vif_release_channel(sdata);
aa458d17 1748}
f0706e82 1749
3cf335d5
KV		 1750void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1751 struct ieee80211_hdr *hdr)
1752{
1753 /*
1754 * We can postpone the mgd.timer whenever receiving unicast frames
1755 * from AP because we know that the connection is working both ways
1756 * at that time. But multicast frames (and hence also beacons) must
1757 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 1758 * data idle periods for sending the periodic probe request to the
1759 * AP we're connected to.
3cf335d5 1760 */
b291ba11
JB		 1761 if (is_multicast_ether_addr(hdr->addr1))
1762 return;
1763
be099e82 1764 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 1765}
f0706e82 1766
4e5ff376
FF		 1767static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1768{
1769 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
133d40f9 1770 struct ieee80211_local *local = sdata->local;
4e5ff376 1771
133d40f9 1772 mutex_lock(&local->mtx);
392b9ffb
SG		 1773 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
1774 goto out;
4e5ff376 1775
925e64c3 1776 __ieee80211_stop_poll(sdata);
133d40f9
SG		 1777
1778 mutex_lock(&local->iflist_mtx);
1779 ieee80211_recalc_ps(local, -1);
1780 mutex_unlock(&local->iflist_mtx);
4e5ff376
FF		 1781
1782 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
133d40f9 1783 goto out;
4e5ff376
FF		 1784
1785 /*
1786 * We've received a probe response, but are not sure whether
1787 * we have or will be receiving any beacons or data, so let's
1788 * schedule the timers again, just in case.
1789 */
1790 ieee80211_sta_reset_beacon_monitor(sdata);
1791
1792 mod_timer(&ifmgd->conn_mon_timer,
1793 round_jiffies_up(jiffies +
1794 IEEE80211_CONNECTION_IDLE_TIME));
133d40f9 1795out:
133d40f9 1796 mutex_unlock(&local->mtx);
4e5ff376
FF		 1797}
1798
1799void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
04ac3c0e 1800 struct ieee80211_hdr *hdr, bool ack)
4e5ff376 1801{
75706d0e 1802 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF		 1803 return;
1804
4e5ff376
FF		 1805 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1806 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e 1807 if (ack)
cab1c7fd 1808 ieee80211_sta_reset_conn_monitor(sdata);
04ac3c0e
FF		 1809 else
1810 sdata->u.mgd.nullfunc_failed = true;
4e5ff376 1811 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
cab1c7fd 1812 return;
4e5ff376 1813 }
cab1c7fd
WD		 1814
1815 if (ack)
1816 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF		 1817}
1818
a43abf29
ML		 1819static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1820{
1821 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1822 const u8 *ssid;
f01a067d 1823 u8 *dst = ifmgd->associated->bssid;
180205bd 1824 u8 unicast_limit = max(1, max_probe_tries - 3);
f01a067d
LR		 1825
1826 /*
1827 * Try sending broadcast probe requests for the last three
1828 * probe requests after the first ones failed since some
1829 * buggy APs only support broadcast probe requests.
1830 */
1831 if (ifmgd->probe_send_count >= unicast_limit)
1832 dst = NULL;
a43abf29 1833
4e5ff376
FF		 1834 /*
1835 * When the hardware reports an accurate Tx ACK status, it's
1836 * better to send a nullfunc frame instead of a probe request,
1837 * as it will kick us off the AP quickly if we aren't associated
1838 * anymore. The timeout will be reset if the frame is ACKed by
1839 * the AP.
1840 */
992e68bf
SD		 1841 ifmgd->probe_send_count++;
1842
04ac3c0e
FF		 1843 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1844 ifmgd->nullfunc_failed = false;
4e5ff376 1845 ieee80211_send_nullfunc(sdata->local, sdata, 0);
04ac3c0e 1846 } else {
88c868c4
SG		 1847 int ssid_len;
1848
9caf0364 1849 rcu_read_lock();
4e5ff376 1850 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
88c868c4
SG		 1851 if (WARN_ON_ONCE(ssid == NULL))
1852 ssid_len = 0;
1853 else
1854 ssid_len = ssid[1];
1855
1856 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
1672c0e3 1857 0, (u32) -1, true, 0,
55de908a 1858 ifmgd->associated->channel, false);
9caf0364 1859 rcu_read_unlock();
4e5ff376 1860 }
a43abf29 1861
180205bd 1862 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
8d61ffa5 1863 run_again(sdata, ifmgd->probe_timeout);
f69b9c79 1864 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
39ecc01d 1865 ieee80211_flush_queues(sdata->local, sdata);
a43abf29
ML		 1866}
1867
b291ba11
JB		 1868static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1869 bool beacon)
04de8381 1870{
04de8381 1871 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 1872 bool already = false;
34bfc411 1873
9607e6b6 1874 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 1875 return;
1876
8d61ffa5 1877 sdata_lock(sdata);
77fdaa12
JB		 1878
1879 if (!ifmgd->associated)
1880 goto out;
1881
133d40f9
SG		 1882 mutex_lock(&sdata->local->mtx);
1883
1884 if (sdata->local->tmp_channel || sdata->local->scanning) {
1885 mutex_unlock(&sdata->local->mtx);
1886 goto out;
1887 }
1888
a13fbe54 1889 if (beacon) {
bdcbd8e0 1890 mlme_dbg_ratelimited(sdata,
59c1ec2b
BG		 1891 "detected beacon loss from AP (missed %d beacons) - probing\n",
1892 beacon_loss_count);
bdcbd8e0 1893
a13fbe54
BG		 1894 ieee80211_cqm_rssi_notify(&sdata->vif,
1895 NL80211_CQM_RSSI_BEACON_LOSS_EVENT,
1896 GFP_KERNEL);
1897 }
04de8381 1898
b291ba11
JB		 1899 /*
1900 * The driver/our work has already reported this event or the
1901 * connection monitoring has kicked in and we have already sent
1902 * a probe request. Or maybe the AP died and the driver keeps
1903 * reporting until we disassociate...
1904 *
1905 * In either case we have to ignore the current call to this
1906 * function (except for setting the correct probe reason bit)
1907 * because otherwise we would reset the timer every time and
1908 * never check whether we received a probe response!
1909 */
392b9ffb 1910 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
b291ba11
JB		 1911 already = true;
1912
133d40f9
SG		 1913 mutex_unlock(&sdata->local->mtx);
1914
b291ba11
JB		 1915 if (already)
1916 goto out;
1917
4e751843
JB		 1918 mutex_lock(&sdata->local->iflist_mtx);
1919 ieee80211_recalc_ps(sdata->local, -1);
1920 mutex_unlock(&sdata->local->iflist_mtx);
1921
a43abf29
ML		 1922 ifmgd->probe_send_count = 0;
1923 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12 1924 out:
8d61ffa5 1925 sdata_unlock(sdata);
04de8381
KV		 1926}
1927
a619a4c0
JO		 1928struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
1929 struct ieee80211_vif *vif)
1930{
1931 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1932 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d9b3b28b 1933 struct cfg80211_bss *cbss;
a619a4c0
JO		 1934 struct sk_buff *skb;
1935 const u8 *ssid;
88c868c4 1936 int ssid_len;
a619a4c0
JO		 1937
1938 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1939 return NULL;
1940
8d61ffa5 1941 sdata_assert_lock(sdata);
a619a4c0 1942
d9b3b28b
EP		 1943 if (ifmgd->associated)
1944 cbss = ifmgd->associated;
1945 else if (ifmgd->auth_data)
1946 cbss = ifmgd->auth_data->bss;
1947 else if (ifmgd->assoc_data)
1948 cbss = ifmgd->assoc_data->bss;
1949 else
a619a4c0
JO		 1950 return NULL;
1951
9caf0364 1952 rcu_read_lock();
d9b3b28b 1953 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
88c868c4
SG		 1954 if (WARN_ON_ONCE(ssid == NULL))
1955 ssid_len = 0;
1956 else
1957 ssid_len = ssid[1];
1958
d9b3b28b 1959 skb = ieee80211_build_probe_req(sdata, cbss->bssid,
55de908a 1960 (u32) -1, cbss->channel,
6b77863b 1961 ssid + 2, ssid_len,
85a237fe 1962 NULL, 0, true);
9caf0364 1963 rcu_read_unlock();
a619a4c0
JO		 1964
1965 return skb;
1966}
1967EXPORT_SYMBOL(ieee80211_ap_probereq_get);
1968
eef9e54c 1969static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
1e4dcd01
JO		 1970{
1971 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 1972 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
1e4dcd01 1973
8d61ffa5 1974 sdata_lock(sdata);
1e4dcd01 1975 if (!ifmgd->associated) {
8d61ffa5 1976 sdata_unlock(sdata);
1e4dcd01
JO		 1977 return;
1978 }
1979
37ad3888
JB		 1980 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
1981 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
eef9e54c 1982 true, frame_buf);
882a7c69 1983 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
7578d575 1984 sdata->vif.csa_active = false;
5b36ebd8 1985 ieee80211_wake_queues_by_reason(&sdata->local->hw,
445ea4e8 1986 IEEE80211_MAX_QUEUE_MAP,
5b36ebd8 1987 IEEE80211_QUEUE_STOP_REASON_CSA);
7da7cc1d 1988
6ff57cf8
JB		 1989 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
1990 IEEE80211_DEAUTH_FRAME_LEN);
8d61ffa5 1991 sdata_unlock(sdata);
1e4dcd01
JO		 1992}
1993
cc74c0c7 1994static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 1995{
1996 struct ieee80211_sub_if_data *sdata =
1997 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 1998 u.mgd.beacon_connection_loss_work);
a85e1d55
PS		 1999 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2000 struct sta_info *sta;
2001
2002 if (ifmgd->associated) {
30fa9047 2003 rcu_read_lock();
a85e1d55
PS		 2004 sta = sta_info_get(sdata, ifmgd->bssid);
2005 if (sta)
2006 sta->beacon_loss_count++;
30fa9047 2007 rcu_read_unlock();
a85e1d55 2008 }
b291ba11 2009
682bd38b 2010 if (ifmgd->connection_loss) {
882a7c69
JB		 2011 sdata_info(sdata, "Connection to AP %pM lost\n",
2012 ifmgd->bssid);
eef9e54c 2013 __ieee80211_disconnect(sdata);
882a7c69 2014 } else {
1e4dcd01 2015 ieee80211_mgd_probe_ap(sdata, true);
882a7c69
JB		 2016 }
2017}
2018
2019static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2020{
2021 struct ieee80211_sub_if_data *sdata =
2022 container_of(work, struct ieee80211_sub_if_data,
2023 u.mgd.csa_connection_drop_work);
2024
eef9e54c 2025 __ieee80211_disconnect(sdata);
b291ba11
JB		 2026}
2027
04de8381
KV		 2028void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2029{
2030 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 2031 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 2032
b5878a2d
JB		 2033 trace_api_beacon_loss(sdata);
2034
682bd38b 2035 sdata->u.mgd.connection_loss = false;
1e4dcd01 2036 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 2037}
2038EXPORT_SYMBOL(ieee80211_beacon_loss);
2039
1e4dcd01
JO		 2040void ieee80211_connection_loss(struct ieee80211_vif *vif)
2041{
2042 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2043 struct ieee80211_hw *hw = &sdata->local->hw;
2044
b5878a2d
JB		 2045 trace_api_connection_loss(sdata);
2046
682bd38b 2047 sdata->u.mgd.connection_loss = true;
1e4dcd01
JO		 2048 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2049}
2050EXPORT_SYMBOL(ieee80211_connection_loss);
2051
2052
66e67e41
JB		 2053static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2054 bool assoc)
2055{
2056 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2057
8d61ffa5 2058 sdata_assert_lock(sdata);
66e67e41 2059
66e67e41
JB		 2060 if (!assoc) {
2061 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2062
2063 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2064 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
028e8da0 2065 sdata->u.mgd.flags = 0;
55de908a 2066 ieee80211_vif_release_channel(sdata);
66e67e41
JB		 2067 }
2068
5b112d3d 2069 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
66e67e41
JB		 2070 kfree(auth_data);
2071 sdata->u.mgd.auth_data = NULL;
2072}
2073
2074static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2075 struct ieee80211_mgmt *mgmt, size_t len)
2076{
1672c0e3 2077 struct ieee80211_local *local = sdata->local;
66e67e41
JB		 2078 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2079 u8 *pos;
2080 struct ieee802_11_elems elems;
1672c0e3 2081 u32 tx_flags = 0;
66e67e41
JB		 2082
2083 pos = mgmt->u.auth.variable;
b2e506bf 2084 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
66e67e41
JB		 2085 if (!elems.challenge)
2086 return;
2087 auth_data->expected_transaction = 4;
a1845fc7 2088 drv_mgd_prepare_tx(sdata->local, sdata);
1672c0e3
JB		 2089 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2090 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2091 IEEE80211_TX_INTFL_MLME_CONN_TX;
700e8ea6 2092 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
66e67e41
JB		 2093 elems.challenge - 2, elems.challenge_len + 2,
2094 auth_data->bss->bssid, auth_data->bss->bssid,
2095 auth_data->key, auth_data->key_len,
1672c0e3 2096 auth_data->key_idx, tx_flags);
66e67e41
JB		 2097}
2098
8d61ffa5
JB		 2099static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2100 struct ieee80211_mgmt *mgmt, size_t len)
66e67e41
JB		 2101{
2102 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2103 u8 bssid[ETH_ALEN];
2104 u16 auth_alg, auth_transaction, status_code;
2105 struct sta_info *sta;
2106
8d61ffa5 2107 sdata_assert_lock(sdata);
66e67e41
JB		 2108
2109 if (len < 24 + 6)
8d61ffa5 2110 return;
66e67e41
JB		 2111
2112 if (!ifmgd->auth_data || ifmgd->auth_data->done)
8d61ffa5 2113 return;
66e67e41
JB		 2114
2115 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2116
b203ca39 2117 if (!ether_addr_equal(bssid, mgmt->bssid))
8d61ffa5 2118 return;
66e67e41
JB		 2119
2120 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2121 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2122 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2123
2124 if (auth_alg != ifmgd->auth_data->algorithm ||
0f4126e8
JM		 2125 auth_transaction != ifmgd->auth_data->expected_transaction) {
2126 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2127 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2128 auth_transaction,
2129 ifmgd->auth_data->expected_transaction);
8d61ffa5 2130 return;
0f4126e8 2131 }
66e67e41
JB		 2132
2133 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2134 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2135 mgmt->sa, status_code);
dac211ec 2136 ieee80211_destroy_auth_data(sdata, false);
6ff57cf8 2137 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
8d61ffa5 2138 return;
66e67e41
JB		 2139 }
2140
2141 switch (ifmgd->auth_data->algorithm) {
2142 case WLAN_AUTH_OPEN:
2143 case WLAN_AUTH_LEAP:
2144 case WLAN_AUTH_FT:
6b8ece3a 2145 case WLAN_AUTH_SAE:
66e67e41
JB		 2146 break;
2147 case WLAN_AUTH_SHARED_KEY:
2148 if (ifmgd->auth_data->expected_transaction != 4) {
2149 ieee80211_auth_challenge(sdata, mgmt, len);
2150 /* need another frame */
8d61ffa5 2151 return;
66e67e41
JB		 2152 }
2153 break;
2154 default:
2155 WARN_ONCE(1, "invalid auth alg %d",
2156 ifmgd->auth_data->algorithm);
8d61ffa5 2157 return;
66e67e41
JB		 2158 }
2159
bdcbd8e0 2160 sdata_info(sdata, "authenticated\n");
66e67e41
JB		 2161 ifmgd->auth_data->done = true;
2162 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
89afe614 2163 ifmgd->auth_data->timeout_started = true;
8d61ffa5 2164 run_again(sdata, ifmgd->auth_data->timeout);
66e67e41 2165
6b8ece3a
JM		 2166 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2167 ifmgd->auth_data->expected_transaction != 2) {
2168 /*
2169 * Report auth frame to user space for processing since another
2170 * round of Authentication frames is still needed.
2171 */
6ff57cf8 2172 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
8d61ffa5 2173 return;
6b8ece3a
JM		 2174 }
2175
66e67e41
JB		 2176 /* move station state to auth */
2177 mutex_lock(&sdata->local->sta_mtx);
2178 sta = sta_info_get(sdata, bssid);
2179 if (!sta) {
2180 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2181 goto out_err;
2182 }
2183 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
bdcbd8e0 2184 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
66e67e41
JB		 2185 goto out_err;
2186 }
2187 mutex_unlock(&sdata->local->sta_mtx);
2188
6ff57cf8 2189 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
8d61ffa5 2190 return;
66e67e41
JB		 2191 out_err:
2192 mutex_unlock(&sdata->local->sta_mtx);
2193 /* ignore frame -- wait for timeout */
66e67e41
JB		 2194}
2195
2196
8d61ffa5
JB		 2197static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2198 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2199{
46900298 2200 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 2201 const u8 *bssid = NULL;
f0706e82
JB		 2202 u16 reason_code;
2203
8d61ffa5 2204 sdata_assert_lock(sdata);
66e67e41 2205
f4ea83dd 2206 if (len < 24 + 2)
8d61ffa5 2207 return;
f0706e82 2208
66e67e41 2209 if (!ifmgd->associated ||
b203ca39 2210 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
8d61ffa5 2211 return;
77fdaa12 2212
0c1ad2ca 2213 bssid = ifmgd->associated->bssid;
f0706e82
JB		 2214
2215 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2216
bdcbd8e0
JB		 2217 sdata_info(sdata, "deauthenticated from %pM (Reason: %u)\n",
2218 bssid, reason_code);
77fdaa12 2219
37ad3888
JB		 2220 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2221
6ff57cf8 2222 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
f0706e82
JB		 2223}
2224
2225
8d61ffa5
JB		 2226static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2227 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2228{
46900298 2229 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 2230 u16 reason_code;
2231
8d61ffa5 2232 sdata_assert_lock(sdata);
77fdaa12 2233
66e67e41 2234 if (len < 24 + 2)
8d61ffa5 2235 return;
77fdaa12 2236
66e67e41 2237 if (!ifmgd->associated ||
b203ca39 2238 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
8d61ffa5 2239 return;
f0706e82
JB		 2240
2241 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2242
bdcbd8e0
JB		 2243 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2244 mgmt->sa, reason_code);
f0706e82 2245
37ad3888
JB		 2246 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2247
6ff57cf8 2248 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
f0706e82
JB		 2249}
2250
c74d084f
CL		 2251static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2252 u8 *supp_rates, unsigned int supp_rates_len,
2253 u32 *rates, u32 *basic_rates,
2254 bool *have_higher_than_11mbit,
2103dec1
SW		 2255 int *min_rate, int *min_rate_index,
2256 int shift, u32 rate_flags)
c74d084f
CL		 2257{
2258 int i, j;
2259
2260 for (i = 0; i < supp_rates_len; i++) {
2103dec1 2261 int rate = supp_rates[i] & 0x7f;
c74d084f
CL		 2262 bool is_basic = !!(supp_rates[i] & 0x80);
2263
2103dec1 2264 if ((rate * 5 * (1 << shift)) > 110)
c74d084f
CL		 2265 *have_higher_than_11mbit = true;
2266
2267 /*
2268 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2269 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2270 *
2271 * Note: Even through the membership selector and the basic
2272 * rate flag share the same bit, they are not exactly
2273 * the same.
2274 */
2275 if (!!(supp_rates[i] & 0x80) &&
2276 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2277 continue;
2278
2279 for (j = 0; j < sband->n_bitrates; j++) {
2103dec1
SW		 2280 struct ieee80211_rate *br;
2281 int brate;
2282
2283 br = &sband->bitrates[j];
2284 if ((rate_flags & br->flags) != rate_flags)
2285 continue;
2286
2287 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2288 if (brate == rate) {
c74d084f
CL		 2289 *rates |= BIT(j);
2290 if (is_basic)
2291 *basic_rates |= BIT(j);
2103dec1
SW		 2292 if ((rate * 5) < *min_rate) {
2293 *min_rate = rate * 5;
c74d084f
CL		 2294 *min_rate_index = j;
2295 }
2296 break;
2297 }
2298 }
2299 }
2300}
f0706e82 2301
66e67e41
JB		 2302static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2303 bool assoc)
2304{
2305 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2306
8d61ffa5 2307 sdata_assert_lock(sdata);
66e67e41 2308
66e67e41
JB		 2309 if (!assoc) {
2310 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2311
2312 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2313 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
028e8da0 2314 sdata->u.mgd.flags = 0;
55de908a 2315 ieee80211_vif_release_channel(sdata);
66e67e41
JB		 2316 }
2317
2318 kfree(assoc_data);
2319 sdata->u.mgd.assoc_data = NULL;
2320}
2321
2322static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2323 struct cfg80211_bss *cbss,
af6b6374 2324 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2325{
46900298 2326 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 2327 struct ieee80211_local *local = sdata->local;
8318d78a 2328 struct ieee80211_supported_band *sband;
f0706e82 2329 struct sta_info *sta;
af6b6374 2330 u8 *pos;
af6b6374 2331 u16 capab_info, aid;
f0706e82 2332 struct ieee802_11_elems elems;
bda3933a 2333 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
35d865af
JB		 2334 const struct cfg80211_bss_ies *bss_ies = NULL;
2335 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
ae5eb026 2336 u32 changed = 0;
c74d084f 2337 int err;
35d865af 2338 bool ret;
f0706e82 2339
af6b6374 2340 /* AssocResp and ReassocResp have identical structure */
f0706e82 2341
f0706e82 2342 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 2343 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 2344
1dd84aa2 2345 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
bdcbd8e0
JB		 2346 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2347 aid);
1dd84aa2
JB		 2348 aid &= ~(BIT(15) | BIT(14));
2349
05cb9108
JB		 2350 ifmgd->broken_ap = false;
2351
2352 if (aid == 0 || aid > IEEE80211_MAX_AID) {
bdcbd8e0
JB		 2353 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2354 aid);
05cb9108
JB		 2355 aid = 0;
2356 ifmgd->broken_ap = true;
2357 }
2358
af6b6374 2359 pos = mgmt->u.assoc_resp.variable;
b2e506bf 2360 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
af6b6374 2361
f0706e82 2362 if (!elems.supp_rates) {
bdcbd8e0 2363 sdata_info(sdata, "no SuppRates element in AssocResp\n");
af6b6374 2364 return false;
f0706e82
JB		 2365 }
2366
46900298 2367 ifmgd->aid = aid;
f0706e82 2368
35d865af
JB		 2369 /*
2370 * Some APs are erroneously not including some information in their
2371 * (re)association response frames. Try to recover by using the data
2372 * from the beacon or probe response. This seems to afflict mobile
2373 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2374 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2375 */
2376 if ((assoc_data->wmm && !elems.wmm_param) ||
2377 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2378 (!elems.ht_cap_elem || !elems.ht_operation)) ||
2379 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2380 (!elems.vht_cap_elem || !elems.vht_operation))) {
2381 const struct cfg80211_bss_ies *ies;
2382 struct ieee802_11_elems bss_elems;
2383
2384 rcu_read_lock();
2385 ies = rcu_dereference(cbss->ies);
2386 if (ies)
2387 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2388 GFP_ATOMIC);
2389 rcu_read_unlock();
2390 if (!bss_ies)
2391 return false;
2392
2393 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2394 false, &bss_elems);
2395 if (assoc_data->wmm &&
2396 !elems.wmm_param && bss_elems.wmm_param) {
2397 elems.wmm_param = bss_elems.wmm_param;
2398 sdata_info(sdata,
2399 "AP bug: WMM param missing from AssocResp\n");
2400 }
2401
2402 /*
2403 * Also check if we requested HT/VHT, otherwise the AP doesn't
2404 * have to include the IEs in the (re)association response.
2405 */
2406 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2407 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2408 elems.ht_cap_elem = bss_elems.ht_cap_elem;
2409 sdata_info(sdata,
2410 "AP bug: HT capability missing from AssocResp\n");
2411 }
2412 if (!elems.ht_operation && bss_elems.ht_operation &&
2413 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2414 elems.ht_operation = bss_elems.ht_operation;
2415 sdata_info(sdata,
2416 "AP bug: HT operation missing from AssocResp\n");
2417 }
2418 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2419 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2420 elems.vht_cap_elem = bss_elems.vht_cap_elem;
2421 sdata_info(sdata,
2422 "AP bug: VHT capa missing from AssocResp\n");
2423 }
2424 if (!elems.vht_operation && bss_elems.vht_operation &&
2425 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2426 elems.vht_operation = bss_elems.vht_operation;
2427 sdata_info(sdata,
2428 "AP bug: VHT operation missing from AssocResp\n");
2429 }
2430 }
2431
30eb1dc2
JB		 2432 /*
2433 * We previously checked these in the beacon/probe response, so
2434 * they should be present here. This is just a safety net.
2435 */
2436 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2437 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2438 sdata_info(sdata,
35d865af
JB		 2439 "HT AP is missing WMM params or HT capability/operation\n");
2440 ret = false;
2441 goto out;
30eb1dc2
JB		 2442 }
2443
2444 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2445 (!elems.vht_cap_elem || !elems.vht_operation)) {
2446 sdata_info(sdata,
35d865af
JB		 2447 "VHT AP is missing VHT capability/operation\n");
2448 ret = false;
2449 goto out;
30eb1dc2
JB		 2450 }
2451
2a33bee2
GE		 2452 mutex_lock(&sdata->local->sta_mtx);
2453 /*
2454 * station info was already allocated and inserted before
2455 * the association and should be available to us
2456 */
7852e361 2457 sta = sta_info_get(sdata, cbss->bssid);
2a33bee2
GE		 2458 if (WARN_ON(!sta)) {
2459 mutex_unlock(&sdata->local->sta_mtx);
35d865af
JB		 2460 ret = false;
2461 goto out;
77fdaa12 2462 }
05e5e883 2463
55de908a 2464 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
f709fc69 2465
30eb1dc2 2466 /* Set up internal HT/VHT capabilities */
a8243b72 2467 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
ef96a842 2468 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
e1a0c6b3 2469 elems.ht_cap_elem, sta);
64f68e5d 2470
818255ea
MP		 2471 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2472 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
4a34215e 2473 elems.vht_cap_elem, sta);
818255ea 2474
30eb1dc2
JB		 2475 /*
2476 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
2477 * in their association response, so ignore that data for our own
2478 * configuration. If it changed since the last beacon, we'll get the
2479 * next beacon and update then.
2480 */
1128958d 2481
bee7f586
JB		 2482 /*
2483 * If an operating mode notification IE is present, override the
2484 * NSS calculation (that would be done in rate_control_rate_init())
2485 * and use the # of streams from that element.
2486 */
2487 if (elems.opmode_notif &&
2488 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
2489 u8 nss;
2490
2491 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
2492 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
2493 nss += 1;
2494 sta->sta.rx_nss = nss;
2495 }
2496
4b7679a5 2497 rate_control_rate_init(sta);
f0706e82 2498
46900298 2499 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
c2c98fde 2500 set_sta_flag(sta, WLAN_STA_MFP);
5394af4d 2501
ddf4ac53 2502 if (elems.wmm_param)
c2c98fde 2503 set_sta_flag(sta, WLAN_STA_WME);
ddf4ac53 2504
3e4d40fa 2505 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
c8987876
JB		 2506 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2507 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2508 if (err) {
bdcbd8e0
JB		 2509 sdata_info(sdata,
2510 "failed to move station %pM to desired state\n",
2511 sta->sta.addr);
c8987876
JB		 2512 WARN_ON(__sta_info_destroy(sta));
2513 mutex_unlock(&sdata->local->sta_mtx);
35d865af
JB		 2514 ret = false;
2515 goto out;
c8987876
JB		 2516 }
2517
7852e361 2518 mutex_unlock(&sdata->local->sta_mtx);
ddf4ac53 2519
f2176d72
JO		 2520 /*
2521 * Always handle WMM once after association regardless
2522 * of the first value the AP uses. Setting -1 here has
2523 * that effect because the AP values is an unsigned
2524 * 4-bit value.
2525 */
2526 ifmgd->wmm_last_param_set = -1;
2527
095d81ce 2528 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && elems.wmm_param)
4ced3f74 2529 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 2530 elems.wmm_param_len);
aa837e1d 2531 else
3abead59
JB		 2532 ieee80211_set_wmm_default(sdata, false);
2533 changed |= BSS_CHANGED_QOS;
f0706e82 2534
60f8b39c
JB		 2535 /* set AID and assoc capability,
2536 * ieee80211_set_associated() will tell the driver */
2537 bss_conf->aid = aid;
2538 bss_conf->assoc_capability = capab_info;
0c1ad2ca 2539 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 2540
d524215f
FF		 2541 /*
2542 * If we're using 4-addr mode, let the AP know that we're
2543 * doing so, so that it can create the STA VLAN on its side
2544 */
2545 if (ifmgd->use_4addr)
2546 ieee80211_send_4addr_nullfunc(local, sdata);
2547
15b7b062 2548 /*
b291ba11
JB		 2549 * Start timer to probe the connection to the AP now.
2550 * Also start the timer that will detect beacon loss.
15b7b062 2551 */
b291ba11 2552 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 2553 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 2554
35d865af
JB		 2555 ret = true;
2556 out:
2557 kfree(bss_ies);
2558 return ret;
f0706e82
JB		 2559}
2560
8d61ffa5
JB		 2561static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2562 struct ieee80211_mgmt *mgmt,
2563 size_t len)
66e67e41
JB		 2564{
2565 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2566 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2567 u16 capab_info, status_code, aid;
2568 struct ieee802_11_elems elems;
2569 u8 *pos;
2570 bool reassoc;
8d61ffa5 2571 struct cfg80211_bss *bss;
66e67e41 2572
8d61ffa5 2573 sdata_assert_lock(sdata);
66e67e41
JB		 2574
2575 if (!assoc_data)
8d61ffa5 2576 return;
b203ca39 2577 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
8d61ffa5 2578 return;
66e67e41
JB		 2579
2580 /*
2581 * AssocResp and ReassocResp have identical structure, so process both
2582 * of them in this function.
2583 */
2584
2585 if (len < 24 + 6)
8d61ffa5 2586 return;
66e67e41
JB		 2587
2588 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2589 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2590 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2591 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2592
bdcbd8e0
JB		 2593 sdata_info(sdata,
2594 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2595 reassoc ? "Rea" : "A", mgmt->sa,
2596 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
66e67e41
JB		 2597
2598 pos = mgmt->u.assoc_resp.variable;
b2e506bf 2599 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
66e67e41
JB		 2600
2601 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
79ba1d89
JB		 2602 elems.timeout_int &&
2603 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
66e67e41 2604 u32 tu, ms;
79ba1d89 2605 tu = le32_to_cpu(elems.timeout_int->value);
66e67e41 2606 ms = tu * 1024 / 1000;
bdcbd8e0
JB		 2607 sdata_info(sdata,
2608 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2609 mgmt->sa, tu, ms);
66e67e41 2610 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
89afe614 2611 assoc_data->timeout_started = true;
66e67e41 2612 if (ms > IEEE80211_ASSOC_TIMEOUT)
8d61ffa5
JB		 2613 run_again(sdata, assoc_data->timeout);
2614 return;
66e67e41
JB		 2615 }
2616
8d61ffa5 2617 bss = assoc_data->bss;
66e67e41
JB		 2618
2619 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2620 sdata_info(sdata, "%pM denied association (code=%d)\n",
2621 mgmt->sa, status_code);
66e67e41
JB		 2622 ieee80211_destroy_assoc_data(sdata, false);
2623 } else {
8d61ffa5 2624 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
66e67e41 2625 /* oops -- internal error -- send timeout for now */
10a9109f 2626 ieee80211_destroy_assoc_data(sdata, false);
959867fa 2627 cfg80211_assoc_timeout(sdata->dev, bss);
8d61ffa5 2628 return;
66e67e41 2629 }
635d999f 2630 sdata_info(sdata, "associated\n");
79ebfb85
JB		 2631
2632 /*
2633 * destroy assoc_data afterwards, as otherwise an idle
2634 * recalc after assoc_data is NULL but before associated
2635 * is set can cause the interface to go idle
2636 */
2637 ieee80211_destroy_assoc_data(sdata, true);
66e67e41
JB		 2638 }
2639
6ff57cf8 2640 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len);
66e67e41 2641}
8e3c1b77 2642
98c8fccf 2643static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
8e3c1b77 2644 struct ieee80211_mgmt *mgmt, size_t len,
98c8fccf 2645 struct ieee80211_rx_status *rx_status,
d45c4172 2646 struct ieee802_11_elems *elems)
98c8fccf
JB		 2647{
2648 struct ieee80211_local *local = sdata->local;
2649 int freq;
c2b13452 2650 struct ieee80211_bss *bss;
98c8fccf 2651 struct ieee80211_channel *channel;
56007a02 2652
8d61ffa5 2653 sdata_assert_lock(sdata);
b4f286a1 2654
1cd8e88e 2655 if (elems->ds_params)
59eb21a6
BR		 2656 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
2657 rx_status->band);
98c8fccf
JB		 2658 else
2659 freq = rx_status->freq;
2660
2661 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2662
2663 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2664 return;
2665
98c8fccf 2666 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
d45c4172 2667 channel);
817cee76 2668 if (bss) {
77fdaa12 2669 ieee80211_rx_bss_put(local, bss);
817cee76
AB		 2670 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
2671 }
f0706e82
JB		 2672}
2673
2674
f698d856 2675static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 2676 struct sk_buff *skb)
f0706e82 2677{
af6b6374 2678 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 2679 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 2680 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2681 size_t baselen, len = skb->len;
ae6a44e3
EK		 2682 struct ieee802_11_elems elems;
2683
15b7b062
KV		 2684 ifmgd = &sdata->u.mgd;
2685
8d61ffa5 2686 sdata_assert_lock(sdata);
77fdaa12 2687
b203ca39 2688 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
8e7cdbb6
TW		 2689 return; /* ignore ProbeResp to foreign address */
2690
ae6a44e3
EK		 2691 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2692 if (baselen > len)
2693 return;
2694
2695 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
b2e506bf 2696 false, &elems);
ae6a44e3 2697
d45c4172 2698 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
9859b81e 2699
77fdaa12 2700 if (ifmgd->associated &&
b203ca39 2701 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
4e5ff376 2702 ieee80211_reset_ap_probe(sdata);
66e67e41
JB		 2703
2704 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
b203ca39 2705 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
66e67e41 2706 /* got probe response, continue with auth */
bdcbd8e0 2707 sdata_info(sdata, "direct probe responded\n");
66e67e41
JB		 2708 ifmgd->auth_data->tries = 0;
2709 ifmgd->auth_data->timeout = jiffies;
89afe614 2710 ifmgd->auth_data->timeout_started = true;
8d61ffa5 2711 run_again(sdata, ifmgd->auth_data->timeout);
66e67e41 2712 }
f0706e82
JB		 2713}
2714
d91f36db
JB		 2715/*
2716 * This is the canonical list of information elements we care about,
2717 * the filter code also gives us all changes to the Microsoft OUI
2718 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2719 *
2720 * We implement beacon filtering in software since that means we can
2721 * avoid processing the frame here and in cfg80211, and userspace
2722 * will not be able to tell whether the hardware supports it or not.
2723 *
2724 * XXX: This list needs to be dynamic -- userspace needs to be able to
2725 * add items it requires. It also needs to be able to tell us to
2726 * look out for other vendor IEs.
2727 */
2728static const u64 care_about_ies =
1d4df3a5
JB		 2729 (1ULL << WLAN_EID_COUNTRY) |
2730 (1ULL << WLAN_EID_ERP_INFO) |
2731 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2732 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2733 (1ULL << WLAN_EID_HT_CAPABILITY) |
074d46d1 2734 (1ULL << WLAN_EID_HT_OPERATION);
d91f36db 2735
8d61ffa5
JB		 2736static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
2737 struct ieee80211_mgmt *mgmt, size_t len,
2738 struct ieee80211_rx_status *rx_status)
f0706e82 2739{
d91f36db 2740 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 2741 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 2742 size_t baselen;
2743 struct ieee802_11_elems elems;
f698d856 2744 struct ieee80211_local *local = sdata->local;
55de908a
JB		 2745 struct ieee80211_chanctx_conf *chanctx_conf;
2746 struct ieee80211_channel *chan;
bee7f586 2747 struct sta_info *sta;
471b3efd 2748 u32 changed = 0;
f87ad637 2749 bool erp_valid;
7a5158ef 2750 u8 erp_value = 0;
d91f36db 2751 u32 ncrc;
77fdaa12 2752 u8 *bssid;
8d61ffa5 2753 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
77fdaa12 2754
8d61ffa5 2755 sdata_assert_lock(sdata);
f0706e82 2756
ae6a44e3
EK		 2757 /* Process beacon from the current BSS */
2758 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2759 if (baselen > len)
8d61ffa5 2760 return;
ae6a44e3 2761
55de908a
JB		 2762 rcu_read_lock();
2763 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2764 if (!chanctx_conf) {
2765 rcu_read_unlock();
8d61ffa5 2766 return;
55de908a
JB		 2767 }
2768
4bf88530 2769 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
55de908a 2770 rcu_read_unlock();
8d61ffa5 2771 return;
55de908a 2772 }
4bf88530 2773 chan = chanctx_conf->def.chan;
55de908a 2774 rcu_read_unlock();
f0706e82 2775
c65dd147 2776 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
b203ca39 2777 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
66e67e41 2778 ieee802_11_parse_elems(mgmt->u.beacon.variable,
b2e506bf 2779 len - baselen, false, &elems);
77fdaa12 2780
d45c4172 2781 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
482a9c74
AB		 2782 if (elems.tim && !elems.parse_error) {
2783 const struct ieee80211_tim_ie *tim_ie = elems.tim;
2784 ifmgd->dtim_period = tim_ie->dtim_period;
2785 }
989c6505 2786 ifmgd->have_beacon = true;
c65dd147 2787 ifmgd->assoc_data->need_beacon = false;
ef429dad
JB		 2788 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
2789 sdata->vif.bss_conf.sync_tsf =
2790 le64_to_cpu(mgmt->u.beacon.timestamp);
2791 sdata->vif.bss_conf.sync_device_ts =
2792 rx_status->device_timestamp;
2793 if (elems.tim)
2794 sdata->vif.bss_conf.sync_dtim_count =
2795 elems.tim->dtim_count;
2796 else
2797 sdata->vif.bss_conf.sync_dtim_count = 0;
2798 }
66e67e41
JB		 2799 /* continue assoc process */
2800 ifmgd->assoc_data->timeout = jiffies;
89afe614 2801 ifmgd->assoc_data->timeout_started = true;
8d61ffa5
JB		 2802 run_again(sdata, ifmgd->assoc_data->timeout);
2803 return;
66e67e41 2804 }
77fdaa12 2805
66e67e41 2806 if (!ifmgd->associated ||
b203ca39 2807 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
8d61ffa5 2808 return;
66e67e41 2809 bssid = ifmgd->associated->bssid;
f0706e82 2810
17e4ec14
JM		 2811 /* Track average RSSI from the Beacon frames of the current AP */
2812 ifmgd->last_beacon_signal = rx_status->signal;
2813 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
2814 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3ba06c6f 2815 ifmgd->ave_beacon_signal = rx_status->signal * 16;
17e4ec14 2816 ifmgd->last_cqm_event_signal = 0;
391a200a 2817 ifmgd->count_beacon_signal = 1;
615f7b9b 2818 ifmgd->last_ave_beacon_signal = 0;
17e4ec14
JM		 2819 } else {
2820 ifmgd->ave_beacon_signal =
2821 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
2822 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
2823 ifmgd->ave_beacon_signal) / 16;
391a200a 2824 ifmgd->count_beacon_signal++;
17e4ec14 2825 }
615f7b9b
MV		 2826
2827 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
2828 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
2829 int sig = ifmgd->ave_beacon_signal;
2830 int last_sig = ifmgd->last_ave_beacon_signal;
2831
2832 /*
2833 * if signal crosses either of the boundaries, invoke callback
2834 * with appropriate parameters
2835 */
2836 if (sig > ifmgd->rssi_max_thold &&
2837 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
2838 ifmgd->last_ave_beacon_signal = sig;
887da917 2839 drv_rssi_callback(local, sdata, RSSI_EVENT_HIGH);
615f7b9b
MV		 2840 } else if (sig < ifmgd->rssi_min_thold &&
2841 (last_sig >= ifmgd->rssi_max_thold ||
2842 last_sig == 0)) {
2843 ifmgd->last_ave_beacon_signal = sig;
887da917 2844 drv_rssi_callback(local, sdata, RSSI_EVENT_LOW);
615f7b9b
MV		 2845 }
2846 }
2847
17e4ec14 2848 if (bss_conf->cqm_rssi_thold &&
391a200a 2849 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
ea086359 2850 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
17e4ec14
JM		 2851 int sig = ifmgd->ave_beacon_signal / 16;
2852 int last_event = ifmgd->last_cqm_event_signal;
2853 int thold = bss_conf->cqm_rssi_thold;
2854 int hyst = bss_conf->cqm_rssi_hyst;
2855 if (sig < thold &&
2856 (last_event == 0 || sig < last_event - hyst)) {
2857 ifmgd->last_cqm_event_signal = sig;
2858 ieee80211_cqm_rssi_notify(
2859 &sdata->vif,
2860 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
2861 GFP_KERNEL);
2862 } else if (sig > thold &&
2863 (last_event == 0 || sig > last_event + hyst)) {
2864 ifmgd->last_cqm_event_signal = sig;
2865 ieee80211_cqm_rssi_notify(
2866 &sdata->vif,
2867 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
2868 GFP_KERNEL);
2869 }
2870 }
2871
392b9ffb 2872 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
bdcbd8e0 2873 mlme_dbg_ratelimited(sdata,
112c31f0 2874 "cancelling AP probe due to a received beacon\n");
392b9ffb 2875 ieee80211_reset_ap_probe(sdata);
92778180
JM		 2876 }
2877
b291ba11
JB		 2878 /*
2879 * Push the beacon loss detection into the future since
2880 * we are processing a beacon from the AP just now.
2881 */
d3a910a8 2882 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 2883
d91f36db
JB		 2884 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
2885 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
b2e506bf 2886 len - baselen, false, &elems,
d91f36db
JB		 2887 care_about_ies, ncrc);
2888
25c9c875 2889 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
f87ad637
RR		 2890 bool directed_tim = ieee80211_check_tim(elems.tim,
2891 elems.tim_len,
2892 ifmgd->aid);
1fb3606b 2893 if (directed_tim) {
572e0012 2894 if (local->hw.conf.dynamic_ps_timeout > 0) {
70b12f26
RW		 2895 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2896 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2897 ieee80211_hw_config(local,
2898 IEEE80211_CONF_CHANGE_PS);
2899 }
572e0012 2900 ieee80211_send_nullfunc(local, sdata, 0);
6f0756a3 2901 } else if (!local->pspolling && sdata->u.mgd.powersave) {
572e0012
KV		 2902 local->pspolling = true;
2903
2904 /*
2905 * Here is assumed that the driver will be
2906 * able to send ps-poll frame and receive a
2907 * response even though power save mode is
2908 * enabled, but some drivers might require
2909 * to disable power save here. This needs
2910 * to be investigated.
2911 */
2912 ieee80211_send_pspoll(local, sdata);
2913 }
a97b77b9
VN		 2914 }
2915 }
7a5158ef 2916
488dd7b5 2917 if (sdata->vif.p2p) {
67baf663 2918 struct ieee80211_p2p_noa_attr noa = {};
488dd7b5
JB		 2919 int ret;
2920
2921 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
2922 len - baselen,
2923 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
934457ee 2924 (u8 *) &noa, sizeof(noa));
67baf663
JD		 2925 if (ret >= 2) {
2926 if (sdata->u.mgd.p2p_noa_index != noa.index) {
2927 /* valid noa_attr and index changed */
2928 sdata->u.mgd.p2p_noa_index = noa.index;
2929 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
2930 changed |= BSS_CHANGED_P2P_PS;
2931 /*
2932 * make sure we update all information, the CRC
2933 * mechanism doesn't look at P2P attributes.
2934 */
2935 ifmgd->beacon_crc_valid = false;
2936 }
2937 } else if (sdata->u.mgd.p2p_noa_index != -1) {
2938 /* noa_attr not found and we had valid noa_attr before */
2939 sdata->u.mgd.p2p_noa_index = -1;
2940 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
488dd7b5 2941 changed |= BSS_CHANGED_P2P_PS;
488dd7b5
JB		 2942 ifmgd->beacon_crc_valid = false;
2943 }
2944 }
2945
d8ec4433 2946 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
8d61ffa5 2947 return;
30196673 2948 ifmgd->beacon_crc = ncrc;
d8ec4433 2949 ifmgd->beacon_crc_valid = true;
30196673 2950
d45c4172 2951 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
7d25745d 2952
d70b7616
JB		 2953 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
2954 &elems, true);
2955
095d81ce
JB		 2956 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
2957 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
7d25745d
JB		 2958 elems.wmm_param_len))
2959 changed |= BSS_CHANGED_QOS;
2960
c65dd147
EG		 2961 /*
2962 * If we haven't had a beacon before, tell the driver about the
ef429dad 2963 * DTIM period (and beacon timing if desired) now.
c65dd147 2964 */
989c6505 2965 if (!ifmgd->have_beacon) {
c65dd147
EG		 2966 /* a few bogus AP send dtim_period = 0 or no TIM IE */
2967 if (elems.tim)
2968 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
2969 else
2970 bss_conf->dtim_period = 1;
ef429dad
JB		 2971
2972 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
2973 sdata->vif.bss_conf.sync_tsf =
2974 le64_to_cpu(mgmt->u.beacon.timestamp);
2975 sdata->vif.bss_conf.sync_device_ts =
2976 rx_status->device_timestamp;
2977 if (elems.tim)
2978 sdata->vif.bss_conf.sync_dtim_count =
2979 elems.tim->dtim_count;
2980 else
2981 sdata->vif.bss_conf.sync_dtim_count = 0;
2982 }
2983
989c6505
AB		 2984 changed |= BSS_CHANGED_BEACON_INFO;
2985 ifmgd->have_beacon = true;
482a9c74
AB		 2986
2987 mutex_lock(&local->iflist_mtx);
2988 ieee80211_recalc_ps(local, -1);
2989 mutex_unlock(&local->iflist_mtx);
2990
ce857888 2991 ieee80211_recalc_ps_vif(sdata);
c65dd147
EG		 2992 }
2993
1946bed9 2994 if (elems.erp_info) {
7a5158ef
JB		 2995 erp_valid = true;
2996 erp_value = elems.erp_info[0];
2997 } else {
2998 erp_valid = false;
50c4afb9 2999 }
7a5158ef
JB		 3000 changed |= ieee80211_handle_bss_capability(sdata,
3001 le16_to_cpu(mgmt->u.beacon.capab_info),
3002 erp_valid, erp_value);
f0706e82 3003
1128958d 3004 mutex_lock(&local->sta_mtx);
bee7f586
JB		 3005 sta = sta_info_get(sdata, bssid);
3006
30eb1dc2
JB		 3007 if (ieee80211_config_bw(sdata, sta, elems.ht_operation,
3008 elems.vht_operation, bssid, &changed)) {
3009 mutex_unlock(&local->sta_mtx);
3010 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3011 WLAN_REASON_DEAUTH_LEAVING,
3012 true, deauth_buf);
6ff57cf8
JB		 3013 cfg80211_tx_mlme_mgmt(sdata->dev, deauth_buf,
3014 sizeof(deauth_buf));
8d61ffa5 3015 return;
30eb1dc2 3016 }
bee7f586
JB		 3017
3018 if (sta && elems.opmode_notif)
3019 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3020 rx_status->band, true);
1128958d 3021 mutex_unlock(&local->sta_mtx);
d3c990fb 3022
04b7b2ff
JB		 3023 if (elems.country_elem && elems.pwr_constr_elem &&
3024 mgmt->u.probe_resp.capab_info &
3025 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT))
1ea6f9c0
JB		 3026 changed |= ieee80211_handle_pwr_constr(sdata, chan,
3027 elems.country_elem,
3028 elems.country_elem_len,
3029 elems.pwr_constr_elem);
3f2355cb 3030
471b3efd 3031 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 3032}
3033
1fa57d01
JB		 3034void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3035 struct sk_buff *skb)
f0706e82
JB		 3036{
3037 struct ieee80211_rx_status *rx_status;
f0706e82
JB		 3038 struct ieee80211_mgmt *mgmt;
3039 u16 fc;
1b3a2e49
JB		 3040 struct ieee802_11_elems elems;
3041 int ies_len;
f0706e82 3042
f0706e82
JB		 3043 rx_status = (struct ieee80211_rx_status *) skb->cb;
3044 mgmt = (struct ieee80211_mgmt *) skb->data;
3045 fc = le16_to_cpu(mgmt->frame_control);
3046
8d61ffa5 3047 sdata_lock(sdata);
77fdaa12 3048
66e67e41
JB		 3049 switch (fc & IEEE80211_FCTL_STYPE) {
3050 case IEEE80211_STYPE_BEACON:
8d61ffa5 3051 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
66e67e41
JB		 3052 break;
3053 case IEEE80211_STYPE_PROBE_RESP:
3054 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3055 break;
3056 case IEEE80211_STYPE_AUTH:
8d61ffa5 3057 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
66e67e41
JB		 3058 break;
3059 case IEEE80211_STYPE_DEAUTH:
8d61ffa5 3060 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
66e67e41
JB		 3061 break;
3062 case IEEE80211_STYPE_DISASSOC:
8d61ffa5 3063 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
66e67e41
JB		 3064 break;
3065 case IEEE80211_STYPE_ASSOC_RESP:
3066 case IEEE80211_STYPE_REASSOC_RESP:
8d61ffa5 3067 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
66e67e41
JB		 3068 break;
3069 case IEEE80211_STYPE_ACTION:
37799e52 3070 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
1b3a2e49
JB		 3071 ies_len = skb->len -
3072 offsetof(struct ieee80211_mgmt,
3073 u.action.u.chan_switch.variable);
37799e52
JB		 3074
3075 if (ies_len < 0)
3076 break;
3077
3078 ieee802_11_parse_elems(
3079 mgmt->u.action.u.chan_switch.variable,
b2e506bf 3080 ies_len, true, &elems);
37799e52
JB		 3081
3082 if (elems.parse_error)
3083 break;
3084
1b3a2e49
JB		 3085 ieee80211_sta_process_chanswitch(sdata,
3086 rx_status->mactime,
04a161f4 3087 &elems, false);
1b3a2e49
JB		 3088 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3089 ies_len = skb->len -
3090 offsetof(struct ieee80211_mgmt,
3091 u.action.u.ext_chan_switch.variable);
3092
3093 if (ies_len < 0)
3094 break;
3095
3096 ieee802_11_parse_elems(
3097 mgmt->u.action.u.ext_chan_switch.variable,
b2e506bf 3098 ies_len, true, &elems);
1b3a2e49
JB		 3099
3100 if (elems.parse_error)
3101 break;
3102
3103 /* for the handling code pretend this was also an IE */
3104 elems.ext_chansw_ie =
3105 &mgmt->u.action.u.ext_chan_switch.data;
3106
66e67e41 3107 ieee80211_sta_process_chanswitch(sdata,
37799e52 3108 rx_status->mactime,
04a161f4 3109 &elems, false);
77fdaa12 3110 }
37799e52 3111 break;
77fdaa12 3112 }
8d61ffa5 3113 sdata_unlock(sdata);
f0706e82
JB		 3114}
3115
9c6bd790 3116static void ieee80211_sta_timer(unsigned long data)
f0706e82 3117{
60f8b39c
JB		 3118 struct ieee80211_sub_if_data *sdata =
3119 (struct ieee80211_sub_if_data *) data;
5bb644a0 3120
9b7d72c1 3121 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
f0706e82
JB		 3122}
3123
04ac3c0e 3124static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
6b684db1 3125 u8 *bssid, u8 reason, bool tx)
04ac3c0e 3126{
6ae16775 3127 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
04ac3c0e 3128
37ad3888 3129 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
6b684db1 3130 tx, frame_buf);
37ad3888 3131
6ff57cf8
JB		 3132 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3133 IEEE80211_DEAUTH_FRAME_LEN);
04ac3c0e
FF		 3134}
3135
66e67e41
JB		 3136static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
3137{
3138 struct ieee80211_local *local = sdata->local;
3139 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3140 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
1672c0e3 3141 u32 tx_flags = 0;
66e67e41 3142
8d61ffa5 3143 sdata_assert_lock(sdata);
66e67e41
JB		 3144
3145 if (WARN_ON_ONCE(!auth_data))
3146 return -EINVAL;
3147
66e67e41
JB		 3148 auth_data->tries++;
3149
3150 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
bdcbd8e0
JB		 3151 sdata_info(sdata, "authentication with %pM timed out\n",
3152 auth_data->bss->bssid);
66e67e41
JB		 3153
3154 /*
3155 * Most likely AP is not in the range so remove the
3156 * bss struct for that AP.
3157 */
3158 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3159
3160 return -ETIMEDOUT;
3161 }
3162
a1845fc7
JB		 3163 drv_mgd_prepare_tx(local, sdata);
3164
66e67e41 3165 if (auth_data->bss->proberesp_ies) {
6b8ece3a
JM		 3166 u16 trans = 1;
3167 u16 status = 0;
3168
bdcbd8e0
JB		 3169 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3170 auth_data->bss->bssid, auth_data->tries,
3171 IEEE80211_AUTH_MAX_TRIES);
66e67e41
JB		 3172
3173 auth_data->expected_transaction = 2;
6b8ece3a
JM		 3174
3175 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3176 trans = auth_data->sae_trans;
3177 status = auth_data->sae_status;
3178 auth_data->expected_transaction = trans;
3179 }
3180
6211dd12
SG		 3181 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3182 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3183 IEEE80211_TX_INTFL_MLME_CONN_TX;
3184
6b8ece3a
JM		 3185 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3186 auth_data->data, auth_data->data_len,
66e67e41 3187 auth_data->bss->bssid,
1672c0e3
JB		 3188 auth_data->bss->bssid, NULL, 0, 0,
3189 tx_flags);
66e67e41
JB		 3190 } else {
3191 const u8 *ssidie;
3192
bdcbd8e0
JB		 3193 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
3194 auth_data->bss->bssid, auth_data->tries,
3195 IEEE80211_AUTH_MAX_TRIES);
66e67e41 3196
9caf0364 3197 rcu_read_lock();
66e67e41 3198 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
9caf0364
JB		 3199 if (!ssidie) {
3200 rcu_read_unlock();
66e67e41 3201 return -EINVAL;
9caf0364 3202 }
66e67e41
JB		 3203 /*
3204 * Direct probe is sent to broadcast address as some APs
3205 * will not answer to direct packet in unassociated state.
3206 */
3207 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
6211dd12 3208 NULL, 0, (u32) -1, true, 0,
55de908a 3209 auth_data->bss->channel, false);
9caf0364 3210 rcu_read_unlock();
66e67e41
JB		 3211 }
3212
6211dd12 3213 if (tx_flags == 0) {
1672c0e3 3214 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
cb236d2d 3215 auth_data->timeout_started = true;
8d61ffa5 3216 run_again(sdata, auth_data->timeout);
89afe614 3217 } else {
cb236d2d
JB		 3218 auth_data->timeout =
3219 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3220 auth_data->timeout_started = true;
3221 run_again(sdata, auth_data->timeout);
1672c0e3 3222 }
66e67e41
JB		 3223
3224 return 0;
3225}
3226
3227static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3228{
3229 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3230 struct ieee80211_local *local = sdata->local;
3231
8d61ffa5 3232 sdata_assert_lock(sdata);
66e67e41 3233
66e67e41
JB		 3234 assoc_data->tries++;
3235 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
bdcbd8e0
JB		 3236 sdata_info(sdata, "association with %pM timed out\n",
3237 assoc_data->bss->bssid);
66e67e41
JB		 3238
3239 /*
3240 * Most likely AP is not in the range so remove the
3241 * bss struct for that AP.
3242 */
3243 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3244
3245 return -ETIMEDOUT;
3246 }
3247
bdcbd8e0
JB		 3248 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3249 assoc_data->bss->bssid, assoc_data->tries,
3250 IEEE80211_ASSOC_MAX_TRIES);
66e67e41
JB		 3251 ieee80211_send_assoc(sdata);
3252
1672c0e3
JB		 3253 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
3254 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
89afe614 3255 assoc_data->timeout_started = true;
8d61ffa5 3256 run_again(sdata, assoc_data->timeout);
89afe614 3257 } else {
cb236d2d
JB		 3258 assoc_data->timeout =
3259 round_jiffies_up(jiffies +
3260 IEEE80211_ASSOC_TIMEOUT_LONG);
3261 assoc_data->timeout_started = true;
3262 run_again(sdata, assoc_data->timeout);
1672c0e3 3263 }
66e67e41
JB		 3264
3265 return 0;
3266}
3267
1672c0e3
JB		 3268void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3269 __le16 fc, bool acked)
3270{
3271 struct ieee80211_local *local = sdata->local;
3272
3273 sdata->u.mgd.status_fc = fc;
3274 sdata->u.mgd.status_acked = acked;
3275 sdata->u.mgd.status_received = true;
3276
3277 ieee80211_queue_work(&local->hw, &sdata->work);
3278}
3279
1fa57d01 3280void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 3281{
9c6bd790 3282 struct ieee80211_local *local = sdata->local;
1fa57d01 3283 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 3284
8d61ffa5 3285 sdata_lock(sdata);
77fdaa12 3286
1672c0e3
JB		 3287 if (ifmgd->status_received) {
3288 __le16 fc = ifmgd->status_fc;
3289 bool status_acked = ifmgd->status_acked;
3290
3291 ifmgd->status_received = false;
3292 if (ifmgd->auth_data &&
3293 (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) {
3294 if (status_acked) {
3295 ifmgd->auth_data->timeout =
3296 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
8d61ffa5 3297 run_again(sdata, ifmgd->auth_data->timeout);
1672c0e3
JB		 3298 } else {
3299 ifmgd->auth_data->timeout = jiffies - 1;
3300 }
89afe614 3301 ifmgd->auth_data->timeout_started = true;
1672c0e3
JB		 3302 } else if (ifmgd->assoc_data &&
3303 (ieee80211_is_assoc_req(fc) ||
3304 ieee80211_is_reassoc_req(fc))) {
3305 if (status_acked) {
3306 ifmgd->assoc_data->timeout =
3307 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
8d61ffa5 3308 run_again(sdata, ifmgd->assoc_data->timeout);
1672c0e3
JB		 3309 } else {
3310 ifmgd->assoc_data->timeout = jiffies - 1;
3311 }
89afe614 3312 ifmgd->assoc_data->timeout_started = true;
1672c0e3
JB		 3313 }
3314 }
3315
89afe614 3316 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
66e67e41
JB		 3317 time_after(jiffies, ifmgd->auth_data->timeout)) {
3318 if (ifmgd->auth_data->done) {
3319 /*
3320 * ok ... we waited for assoc but userspace didn't,
3321 * so let's just kill the auth data
3322 */
3323 ieee80211_destroy_auth_data(sdata, false);
3324 } else if (ieee80211_probe_auth(sdata)) {
3325 u8 bssid[ETH_ALEN];
3326
3327 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3328
3329 ieee80211_destroy_auth_data(sdata, false);
3330
6ff57cf8 3331 cfg80211_auth_timeout(sdata->dev, bssid);
66e67e41 3332 }
89afe614 3333 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
8d61ffa5 3334 run_again(sdata, ifmgd->auth_data->timeout);
66e67e41 3335
89afe614 3336 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
66e67e41 3337 time_after(jiffies, ifmgd->assoc_data->timeout)) {
989c6505 3338 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
66e67e41 3339 ieee80211_do_assoc(sdata)) {
959867fa 3340 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
66e67e41
JB		 3341
3342 ieee80211_destroy_assoc_data(sdata, false);
959867fa 3343 cfg80211_assoc_timeout(sdata->dev, bss);
66e67e41 3344 }
89afe614 3345 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
8d61ffa5 3346 run_again(sdata, ifmgd->assoc_data->timeout);
66e67e41 3347
392b9ffb 3348 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
b291ba11 3349 ifmgd->associated) {
a43abf29 3350 u8 bssid[ETH_ALEN];
72a8a3ed 3351 int max_tries;
a43abf29 3352
0c1ad2ca 3353 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 3354
72a8a3ed 3355 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
180205bd 3356 max_tries = max_nullfunc_tries;
72a8a3ed 3357 else
180205bd 3358 max_tries = max_probe_tries;
72a8a3ed 3359
4e5ff376
FF		 3360 /* ACK received for nullfunc probing frame */
3361 if (!ifmgd->probe_send_count)
3362 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 3363 else if (ifmgd->nullfunc_failed) {
3364 if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3365 mlme_dbg(sdata,
3366 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3367 bssid, ifmgd->probe_send_count,
3368 max_tries);
04ac3c0e
FF		 3369 ieee80211_mgd_probe_ap_send(sdata);
3370 } else {
bdcbd8e0
JB		 3371 mlme_dbg(sdata,
3372 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3373 bssid);
95acac61 3374 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1
JB		 3375 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3376 false);
04ac3c0e
FF		 3377 }
3378 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
8d61ffa5 3379 run_again(sdata, ifmgd->probe_timeout);
04ac3c0e 3380 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
bdcbd8e0
JB		 3381 mlme_dbg(sdata,
3382 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3383 bssid, probe_wait_ms);
95acac61 3384 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 3385 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
04ac3c0e 3386 } else if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3387 mlme_dbg(sdata,
3388 "No probe response from AP %pM after %dms, try %d/%i\n",
3389 bssid, probe_wait_ms,
3390 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 3391 ieee80211_mgd_probe_ap_send(sdata);
3392 } else {
b291ba11
JB		 3393 /*
3394 * We actually lost the connection ... or did we?
3395 * Let's make sure!
3396 */
b38afa87
BG		 3397 wiphy_debug(local->hw.wiphy,
3398 "%s: No probe response from AP %pM"
3399 " after %dms, disconnecting.\n",
3400 sdata->name,
180205bd 3401 bssid, probe_wait_ms);
04ac3c0e 3402
95acac61 3403 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 3404 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
b291ba11
JB		 3405 }
3406 }
3407
8d61ffa5 3408 sdata_unlock(sdata);
f0706e82
JB		 3409}
3410
b291ba11
JB		 3411static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3412{
3413 struct ieee80211_sub_if_data *sdata =
3414 (struct ieee80211_sub_if_data *) data;
3415 struct ieee80211_local *local = sdata->local;
3416
3417 if (local->quiescing)
3418 return;
3419
682bd38b 3420 sdata->u.mgd.connection_loss = false;
1e4dcd01
JO		 3421 ieee80211_queue_work(&sdata->local->hw,
3422 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 3423}
3424
3425static void ieee80211_sta_conn_mon_timer(unsigned long data)
3426{
3427 struct ieee80211_sub_if_data *sdata =
3428 (struct ieee80211_sub_if_data *) data;
3429 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3430 struct ieee80211_local *local = sdata->local;
3431
3432 if (local->quiescing)
3433 return;
3434
42935eca 3435 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 3436}
3437
3438static void ieee80211_sta_monitor_work(struct work_struct *work)
3439{
3440 struct ieee80211_sub_if_data *sdata =
3441 container_of(work, struct ieee80211_sub_if_data,
3442 u.mgd.monitor_work);
3443
3444 ieee80211_mgd_probe_ap(sdata, false);
3445}
3446
9c6bd790
JB		 3447static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3448{
494f1fe5
EP		 3449 u32 flags;
3450
ad935687 3451 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
925e64c3 3452 __ieee80211_stop_poll(sdata);
ad935687 3453
b291ba11 3454 /* let's probe the connection once */
494f1fe5
EP		 3455 flags = sdata->local->hw.flags;
3456 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3457 ieee80211_queue_work(&sdata->local->hw,
3458 &sdata->u.mgd.monitor_work);
b291ba11 3459 /* and do all the other regular work too */
64592c8f 3460 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 3461 }
9c6bd790 3462}
f0706e82 3463
b8360ab8
JB		 3464#ifdef CONFIG_PM
3465void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
3466{
3467 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3468
8d61ffa5 3469 sdata_lock(sdata);
b8360ab8 3470 if (!ifmgd->associated) {
8d61ffa5 3471 sdata_unlock(sdata);
b8360ab8
JB		 3472 return;
3473 }
3474
3475 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
3476 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
3477 mlme_dbg(sdata, "driver requested disconnect after resume\n");
3478 ieee80211_sta_connection_lost(sdata,
3479 ifmgd->associated->bssid,
3480 WLAN_REASON_UNSPECIFIED,
3481 true);
8d61ffa5 3482 sdata_unlock(sdata);
b8360ab8
JB		 3483 return;
3484 }
8d61ffa5 3485 sdata_unlock(sdata);
b8360ab8
JB		 3486}
3487#endif
3488
9c6bd790
JB		 3489/* interface setup */
3490void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 3491{
46900298 3492 struct ieee80211_if_managed *ifmgd;
988c0f72 3493
46900298 3494 ifmgd = &sdata->u.mgd;
b291ba11 3495 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 3496 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 3497 INIT_WORK(&ifmgd->beacon_connection_loss_work,
3498 ieee80211_beacon_connection_loss_work);
882a7c69
JB		 3499 INIT_WORK(&ifmgd->csa_connection_drop_work,
3500 ieee80211_csa_connection_drop_work);
687da132 3501 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
46900298 3502 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 3503 (unsigned long) sdata);
b291ba11
JB		 3504 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
3505 (unsigned long) sdata);
3506 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
3507 (unsigned long) sdata);
46900298 3508 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 3509 (unsigned long) sdata);
9c6bd790 3510
ab1faead 3511 ifmgd->flags = 0;
1478acb3 3512 ifmgd->powersave = sdata->wdev.ps;
219c3867
AB		 3513 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
3514 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
67baf663 3515 ifmgd->p2p_noa_index = -1;
bbbdff9e 3516
0f78231b
JB		 3517 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
3518 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
3519 else
3520 ifmgd->req_smps = IEEE80211_SMPS_OFF;
f0706e82
JB		 3521}
3522
77fdaa12
JB		 3523/* scan finished notification */
3524void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 3525{
31ee67a1 3526 struct ieee80211_sub_if_data *sdata;
60f8b39c 3527
77fdaa12
JB		 3528 /* Restart STA timers */
3529 rcu_read_lock();
370bd005
BG		 3530 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3531 if (ieee80211_sdata_running(sdata))
3532 ieee80211_restart_sta_timer(sdata);
3533 }
77fdaa12
JB		 3534 rcu_read_unlock();
3535}
60f8b39c 3536
77fdaa12
JB		 3537int ieee80211_max_network_latency(struct notifier_block *nb,
3538 unsigned long data, void *dummy)
3539{
3540 s32 latency_usec = (s32) data;
3541 struct ieee80211_local *local =
3542 container_of(nb, struct ieee80211_local,
3543 network_latency_notifier);
1fa6f4af 3544
77fdaa12
JB		 3545 mutex_lock(&local->iflist_mtx);
3546 ieee80211_recalc_ps(local, latency_usec);
3547 mutex_unlock(&local->iflist_mtx);
dfe67012 3548
77fdaa12 3549 return 0;
9c6bd790
JB		 3550}
3551
f2d9d270
JB		 3552static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
3553 struct cfg80211_bss *cbss)
3554{
3555 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3556 const u8 *ht_cap_ie, *vht_cap_ie;
3557 const struct ieee80211_ht_cap *ht_cap;
3558 const struct ieee80211_vht_cap *vht_cap;
3559 u8 chains = 1;
3560
3561 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
3562 return chains;
3563
9caf0364 3564 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
f2d9d270
JB		 3565 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
3566 ht_cap = (void *)(ht_cap_ie + 2);
3567 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
3568 /*
3569 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
3570 * "Tx Unequal Modulation Supported" fields.
3571 */
3572 }
3573
3574 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
3575 return chains;
3576
9caf0364 3577 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
f2d9d270
JB		 3578 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
3579 u8 nss;
3580 u16 tx_mcs_map;
3581
3582 vht_cap = (void *)(vht_cap_ie + 2);
3583 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
3584 for (nss = 8; nss > 0; nss--) {
3585 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
3586 IEEE80211_VHT_MCS_NOT_SUPPORTED)
3587 break;
3588 }
3589 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
3590 chains = max(chains, nss);
3591 }
3592
3593 return chains;
3594}
3595
b17166a7
JB		 3596static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
3597 struct cfg80211_bss *cbss)
a1cf775d
JB		 3598{
3599 struct ieee80211_local *local = sdata->local;
3600 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
24398e39 3601 const struct ieee80211_ht_operation *ht_oper = NULL;
f2d9d270 3602 const struct ieee80211_vht_operation *vht_oper = NULL;
24398e39 3603 struct ieee80211_supported_band *sband;
4bf88530 3604 struct cfg80211_chan_def chandef;
f2d9d270 3605 int ret;
a1cf775d 3606
24398e39
JB		 3607 sband = local->hw.wiphy->bands[cbss->channel->band];
3608
f2d9d270
JB		 3609 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
3610 IEEE80211_STA_DISABLE_80P80MHZ |
3611 IEEE80211_STA_DISABLE_160MHZ);
3612
9caf0364
JB		 3613 rcu_read_lock();
3614
f2d9d270
JB		 3615 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3616 sband->ht_cap.ht_supported) {
08e6effa 3617 const u8 *ht_oper_ie, *ht_cap;
24398e39 3618
9caf0364 3619 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
24398e39
JB		 3620 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3621 ht_oper = (void *)(ht_oper_ie + 2);
08e6effa
JB		 3622
3623 ht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
3624 if (!ht_cap || ht_cap[1] < sizeof(struct ieee80211_ht_cap)) {
3625 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3626 ht_oper = NULL;
3627 }
24398e39
JB		 3628 }
3629
f2d9d270
JB		 3630 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3631 sband->vht_cap.vht_supported) {
08e6effa 3632 const u8 *vht_oper_ie, *vht_cap;
f2d9d270 3633
9caf0364
JB		 3634 vht_oper_ie = ieee80211_bss_get_ie(cbss,
3635 WLAN_EID_VHT_OPERATION);
f2d9d270
JB		 3636 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
3637 vht_oper = (void *)(vht_oper_ie + 2);
3638 if (vht_oper && !ht_oper) {
3639 vht_oper = NULL;
bdcbd8e0 3640 sdata_info(sdata,
f2d9d270 3641 "AP advertised VHT without HT, disabling both\n");
cb145022
JB		 3642 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3643 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
24398e39 3644 }
08e6effa
JB		 3645
3646 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
3647 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
3648 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3649 vht_oper = NULL;
3650 }
24398e39
JB		 3651 }
3652
f2d9d270
JB		 3653 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
3654 cbss->channel,
3655 ht_oper, vht_oper,
5cdaed1e 3656 &chandef, false);
04ecd257 3657
f2d9d270
JB		 3658 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
3659 local->rx_chains);
24398e39 3660
9caf0364
JB		 3661 rcu_read_unlock();
3662
04ecd257
JB		 3663 /* will change later if needed */
3664 sdata->smps_mode = IEEE80211_SMPS_OFF;
3665
f2d9d270
JB		 3666 /*
3667 * If this fails (possibly due to channel context sharing
3668 * on incompatible channels, e.g. 80+80 and 160 sharing the
3669 * same control channel) try to use a smaller bandwidth.
3670 */
3671 ret = ieee80211_vif_use_channel(sdata, &chandef,
3672 IEEE80211_CHANCTX_SHARED);
0418a445
SW		 3673
3674 /* don't downgrade for 5 and 10 MHz channels, though. */
3675 if (chandef.width == NL80211_CHAN_WIDTH_5 ||
3676 chandef.width == NL80211_CHAN_WIDTH_10)
3677 return ret;
3678
d601cd8d 3679 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
e6b7cde4 3680 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
d601cd8d
JB		 3681 ret = ieee80211_vif_use_channel(sdata, &chandef,
3682 IEEE80211_CHANCTX_SHARED);
3683 }
f2d9d270 3684 return ret;
b17166a7
JB		 3685}
3686
3687static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
3688 struct cfg80211_bss *cbss, bool assoc)
3689{
3690 struct ieee80211_local *local = sdata->local;
3691 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3692 struct ieee80211_bss *bss = (void *)cbss->priv;
3693 struct sta_info *new_sta = NULL;
3694 bool have_sta = false;
3695 int err;
3696
3697 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3698 return -EINVAL;
3699
3700 if (assoc) {
3701 rcu_read_lock();
3702 have_sta = sta_info_get(sdata, cbss->bssid);
3703 rcu_read_unlock();
3704 }
3705
3706 if (!have_sta) {
3707 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
3708 if (!new_sta)
3709 return -ENOMEM;
3710 }
13e0c8e3 3711 if (new_sta) {
5d6a1b06
JB		 3712 u32 rates = 0, basic_rates = 0;
3713 bool have_higher_than_11mbit;
3714 int min_rate = INT_MAX, min_rate_index = -1;
2103dec1 3715 struct ieee80211_chanctx_conf *chanctx_conf;
b17166a7 3716 struct ieee80211_supported_band *sband;
8cef2c9d 3717 const struct cfg80211_bss_ies *ies;
2103dec1
SW		 3718 int shift;
3719 u32 rate_flags;
b17166a7
JB		 3720
3721 sband = local->hw.wiphy->bands[cbss->channel->band];
3722
3723 err = ieee80211_prep_channel(sdata, cbss);
3724 if (err) {
3725 sta_info_free(local, new_sta);
2103dec1 3726 return -EINVAL;
b17166a7 3727 }
2103dec1
SW		 3728 shift = ieee80211_vif_get_shift(&sdata->vif);
3729
3730 rcu_read_lock();
3731 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3732 if (WARN_ON(!chanctx_conf)) {
3733 rcu_read_unlock();
3734 return -EINVAL;
3735 }
3736 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
3737 rcu_read_unlock();
5d6a1b06 3738
5d6a1b06
JB		 3739 ieee80211_get_rates(sband, bss->supp_rates,
3740 bss->supp_rates_len,
3741 &rates, &basic_rates,
3742 &have_higher_than_11mbit,
2103dec1
SW		 3743 &min_rate, &min_rate_index,
3744 shift, rate_flags);
5d6a1b06
JB		 3745
3746 /*
3747 * This used to be a workaround for basic rates missing
3748 * in the association response frame. Now that we no
3749 * longer use the basic rates from there, it probably
3750 * doesn't happen any more, but keep the workaround so
3751 * in case some *other* APs are buggy in different ways
3752 * we can connect -- with a warning.
3753 */
3754 if (!basic_rates && min_rate_index >= 0) {
bdcbd8e0
JB		 3755 sdata_info(sdata,
3756 "No basic rates, using min rate instead\n");
5d6a1b06
JB		 3757 basic_rates = BIT(min_rate_index);
3758 }
3759
13e0c8e3 3760 new_sta->sta.supp_rates[cbss->channel->band] = rates;
5d6a1b06
JB		 3761 sdata->vif.bss_conf.basic_rates = basic_rates;
3762
3763 /* cf. IEEE 802.11 9.2.12 */
55de908a 3764 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
5d6a1b06
JB		 3765 have_higher_than_11mbit)
3766 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3767 else
3768 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
3769
3770 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
3771
8c358bcd
JB		 3772 /* set timing information */
3773 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
8cef2c9d 3774 rcu_read_lock();
ef429dad
JB		 3775 ies = rcu_dereference(cbss->beacon_ies);
3776 if (ies) {
3777 const u8 *tim_ie;
3778
3779 sdata->vif.bss_conf.sync_tsf = ies->tsf;
3780 sdata->vif.bss_conf.sync_device_ts =
3781 bss->device_ts_beacon;
3782 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
3783 ies->data, ies->len);
3784 if (tim_ie && tim_ie[1] >= 2)
3785 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
3786 else
3787 sdata->vif.bss_conf.sync_dtim_count = 0;
3788 } else if (!(local->hw.flags &
3789 IEEE80211_HW_TIMING_BEACON_ONLY)) {
3790 ies = rcu_dereference(cbss->proberesp_ies);
3791 /* must be non-NULL since beacon IEs were NULL */
3792 sdata->vif.bss_conf.sync_tsf = ies->tsf;
3793 sdata->vif.bss_conf.sync_device_ts =
3794 bss->device_ts_presp;
3795 sdata->vif.bss_conf.sync_dtim_count = 0;
3796 } else {
3797 sdata->vif.bss_conf.sync_tsf = 0;
3798 sdata->vif.bss_conf.sync_device_ts = 0;
3799 sdata->vif.bss_conf.sync_dtim_count = 0;
3800 }
8cef2c9d 3801 rcu_read_unlock();
8c358bcd
JB		 3802
3803 /* tell driver about BSSID, basic rates and timing */
5d6a1b06 3804 ieee80211_bss_info_change_notify(sdata,
8c358bcd
JB		 3805 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
3806 BSS_CHANGED_BEACON_INT);
a1cf775d
JB		 3807
3808 if (assoc)
13e0c8e3 3809 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
a1cf775d 3810
13e0c8e3
JB		 3811 err = sta_info_insert(new_sta);
3812 new_sta = NULL;
a1cf775d 3813 if (err) {
bdcbd8e0
JB		 3814 sdata_info(sdata,
3815 "failed to insert STA entry for the AP (error %d)\n",
3816 err);
a1cf775d
JB		 3817 return err;
3818 }
3819 } else
b203ca39 3820 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
a1cf775d
JB		 3821
3822 return 0;
3823}
3824
77fdaa12
JB		 3825/* config hooks */
3826int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
3827 struct cfg80211_auth_request *req)
9c6bd790 3828{
66e67e41
JB		 3829 struct ieee80211_local *local = sdata->local;
3830 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3831 struct ieee80211_mgd_auth_data *auth_data;
77fdaa12 3832 u16 auth_alg;
66e67e41
JB		 3833 int err;
3834
3835 /* prepare auth data structure */
9c6bd790 3836
77fdaa12
JB		 3837 switch (req->auth_type) {
3838 case NL80211_AUTHTYPE_OPEN_SYSTEM:
3839 auth_alg = WLAN_AUTH_OPEN;
3840 break;
3841 case NL80211_AUTHTYPE_SHARED_KEY:
66e67e41 3842 if (IS_ERR(local->wep_tx_tfm))
9dca9c49 3843 return -EOPNOTSUPP;
77fdaa12
JB		 3844 auth_alg = WLAN_AUTH_SHARED_KEY;
3845 break;
3846 case NL80211_AUTHTYPE_FT:
3847 auth_alg = WLAN_AUTH_FT;
3848 break;
3849 case NL80211_AUTHTYPE_NETWORK_EAP:
3850 auth_alg = WLAN_AUTH_LEAP;
3851 break;
6b8ece3a
JM		 3852 case NL80211_AUTHTYPE_SAE:
3853 auth_alg = WLAN_AUTH_SAE;
3854 break;
77fdaa12
JB		 3855 default:
3856 return -EOPNOTSUPP;
60f8b39c 3857 }
77fdaa12 3858
6b8ece3a
JM		 3859 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
3860 req->ie_len, GFP_KERNEL);
66e67e41 3861 if (!auth_data)
9c6bd790 3862 return -ENOMEM;
77fdaa12 3863
66e67e41 3864 auth_data->bss = req->bss;
77fdaa12 3865
6b8ece3a
JM		 3866 if (req->sae_data_len >= 4) {
3867 __le16 *pos = (__le16 *) req->sae_data;
3868 auth_data->sae_trans = le16_to_cpu(pos[0]);
3869 auth_data->sae_status = le16_to_cpu(pos[1]);
3870 memcpy(auth_data->data, req->sae_data + 4,
3871 req->sae_data_len - 4);
3872 auth_data->data_len += req->sae_data_len - 4;
3873 }
3874
77fdaa12 3875 if (req->ie && req->ie_len) {
6b8ece3a
JM		 3876 memcpy(&auth_data->data[auth_data->data_len],
3877 req->ie, req->ie_len);
3878 auth_data->data_len += req->ie_len;
9c6bd790 3879 }
77fdaa12 3880
fffd0934 3881 if (req->key && req->key_len) {
66e67e41
JB		 3882 auth_data->key_len = req->key_len;
3883 auth_data->key_idx = req->key_idx;
3884 memcpy(auth_data->key, req->key, req->key_len);
fffd0934
JB		 3885 }
3886
66e67e41 3887 auth_data->algorithm = auth_alg;
60f8b39c 3888
66e67e41 3889 /* try to authenticate/probe */
2a33bee2 3890
66e67e41
JB		 3891 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
3892 ifmgd->assoc_data) {
3893 err = -EBUSY;
3894 goto err_free;
2a33bee2
GE		 3895 }
3896
66e67e41
JB		 3897 if (ifmgd->auth_data)
3898 ieee80211_destroy_auth_data(sdata, false);
2a33bee2 3899
66e67e41
JB		 3900 /* prep auth_data so we don't go into idle on disassoc */
3901 ifmgd->auth_data = auth_data;
af6b6374 3902
7b119dc0
JB		 3903 if (ifmgd->associated) {
3904 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3905
3906 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3907 WLAN_REASON_UNSPECIFIED,
3908 false, frame_buf);
3909
6ff57cf8
JB		 3910 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3911 sizeof(frame_buf));
7b119dc0 3912 }
af6b6374 3913
bdcbd8e0 3914 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
e5b900d2 3915
a1cf775d
JB		 3916 err = ieee80211_prep_connection(sdata, req->bss, false);
3917 if (err)
66e67e41 3918 goto err_clear;
af6b6374 3919
66e67e41
JB		 3920 err = ieee80211_probe_auth(sdata);
3921 if (err) {
66e67e41
JB		 3922 sta_info_destroy_addr(sdata, req->bss->bssid);
3923 goto err_clear;
3924 }
3925
3926 /* hold our own reference */
5b112d3d 3927 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
8d61ffa5 3928 return 0;
66e67e41
JB		 3929
3930 err_clear:
3d2abdfd
EP		 3931 memset(ifmgd->bssid, 0, ETH_ALEN);
3932 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 3933 ifmgd->auth_data = NULL;
3934 err_free:
3935 kfree(auth_data);
66e67e41 3936 return err;
af6b6374
JB		 3937}
3938
095d81ce
JB		 3939static bool ieee80211_usable_wmm_params(struct ieee80211_sub_if_data *sdata,
3940 const u8 *wmm_param, int len)
3941{
3942 const u8 *pos;
3943 size_t left;
3944
3945 if (len < 8)
3946 return false;
3947
3948 if (wmm_param[5] != 1 /* version */)
3949 return false;
3950
3951 pos = wmm_param + 8;
3952 left = len - 8;
3953
3954 for (; left >= 4; left -= 4, pos += 4) {
3955 u8 aifsn = pos[0] & 0x0f;
3956 u8 ecwmin = pos[1] & 0x0f;
3957 u8 ecwmax = (pos[1] & 0xf0) >> 4;
3958 int aci = (pos[0] >> 5) & 0x03;
3959
3960 if (aifsn < 2) {
3961 sdata_info(sdata,
3962 "AP has invalid WMM params (AIFSN=%d for ACI %d), disabling WMM\n",
3963 aifsn, aci);
3964 return false;
3965 }
3966 if (ecwmin > ecwmax) {
3967 sdata_info(sdata,
3968 "AP has invalid WMM params (ECWmin/max=%d/%d for ACI %d), disabling WMM\n",
3969 ecwmin, ecwmax, aci);
3970 return false;
3971 }
3972 }
3973
3974 return true;
3975}
3976
77fdaa12
JB		 3977int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
3978 struct cfg80211_assoc_request *req)
f0706e82 3979{
66e67e41 3980 struct ieee80211_local *local = sdata->local;
77fdaa12 3981 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 3982 struct ieee80211_bss *bss = (void *)req->bss->priv;
66e67e41 3983 struct ieee80211_mgd_assoc_data *assoc_data;
c65dd147 3984 const struct cfg80211_bss_ies *beacon_ies;
4e74bfdb 3985 struct ieee80211_supported_band *sband;
b08fbbd8 3986 const u8 *ssidie, *ht_ie, *vht_ie;
2a33bee2 3987 int i, err;
f0706e82 3988
66e67e41
JB		 3989 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
3990 if (!assoc_data)
3991 return -ENOMEM;
3992
9caf0364
JB		 3993 rcu_read_lock();
3994 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
3995 if (!ssidie) {
3996 rcu_read_unlock();
3997 kfree(assoc_data);
3998 return -EINVAL;
3999 }
4000 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4001 assoc_data->ssid_len = ssidie[1];
4002 rcu_read_unlock();
4003
7b119dc0
JB		 4004 if (ifmgd->associated) {
4005 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4006
4007 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4008 WLAN_REASON_UNSPECIFIED,
4009 false, frame_buf);
4010
6ff57cf8
JB		 4011 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4012 sizeof(frame_buf));
7b119dc0 4013 }
66e67e41
JB		 4014
4015 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4016 err = -EBUSY;
4017 goto err_free;
af6b6374 4018 }
77fdaa12 4019
66e67e41
JB		 4020 if (ifmgd->assoc_data) {
4021 err = -EBUSY;
4022 goto err_free;
4023 }
77fdaa12 4024
66e67e41
JB		 4025 if (ifmgd->auth_data) {
4026 bool match;
4027
4028 /* keep sta info, bssid if matching */
b203ca39 4029 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
66e67e41 4030 ieee80211_destroy_auth_data(sdata, match);
2a33bee2
GE		 4031 }
4032
66e67e41 4033 /* prepare assoc data */
095d81ce 4034
d8ec4433
JO		 4035 ifmgd->beacon_crc_valid = false;
4036
095d81ce
JB		 4037 assoc_data->wmm = bss->wmm_used &&
4038 (local->hw.queues >= IEEE80211_NUM_ACS);
4039 if (assoc_data->wmm) {
4040 /* try to check validity of WMM params IE */
4041 const struct cfg80211_bss_ies *ies;
4042 const u8 *wp, *start, *end;
4043
4044 rcu_read_lock();
4045 ies = rcu_dereference(req->bss->ies);
4046 start = ies->data;
4047 end = start + ies->len;
4048
4049 while (true) {
4050 wp = cfg80211_find_vendor_ie(
4051 WLAN_OUI_MICROSOFT,
4052 WLAN_OUI_TYPE_MICROSOFT_WMM,
4053 start, end - start);
4054 if (!wp)
4055 break;
4056 start = wp + wp[1] + 2;
4057 /* if this IE is too short, try the next */
4058 if (wp[1] <= 4)
4059 continue;
4060 /* if this IE is WMM params, we found what we wanted */
4061 if (wp[6] == 1)
4062 break;
4063 }
4064
4065 if (!wp || !ieee80211_usable_wmm_params(sdata, wp + 2,
4066 wp[1] - 2)) {
4067 assoc_data->wmm = false;
4068 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
4069 }
4070 rcu_read_unlock();
4071 }
4072
de5036aa
JB		 4073 /*
4074 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4075 * We still associate in non-HT mode (11a/b/g) if any one of these
4076 * ciphers is configured as pairwise.
4077 * We can set this to true for non-11n hardware, that'll be checked
4078 * separately along with the peer capabilities.
4079 */
1c4cb928 4080 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
77fdaa12
JB		 4081 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4082 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
1c4cb928 4083 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
a8243b72 4084 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
d545daba 4085 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
1c4cb928 4086 netdev_info(sdata->dev,
d545daba 4087 "disabling HT/VHT due to WEP/TKIP use\n");
1c4cb928
JB		 4088 }
4089 }
77fdaa12 4090
d545daba 4091 if (req->flags & ASSOC_REQ_DISABLE_HT) {
a8243b72 4092 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
d545daba
MP		 4093 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4094 }
ef96a842 4095
dd5ecfea
JB		 4096 if (req->flags & ASSOC_REQ_DISABLE_VHT)
4097 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4098
4e74bfdb
JB		 4099 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4100 sband = local->hw.wiphy->bands[req->bss->channel->band];
4101 if (!sband->ht_cap.ht_supported ||
095d81ce
JB		 4102 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4103 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
a8243b72 4104 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
095d81ce
JB		 4105 if (!bss->wmm_used &&
4106 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
1b49de26
JB		 4107 netdev_info(sdata->dev,
4108 "disabling HT as WMM/QoS is not supported by the AP\n");
1c4cb928 4109 }
4e74bfdb 4110
d545daba
MP		 4111 /* disable VHT if we don't support it or the AP doesn't use WMM */
4112 if (!sband->vht_cap.vht_supported ||
095d81ce
JB		 4113 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4114 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
d545daba 4115 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
095d81ce
JB		 4116 if (!bss->wmm_used &&
4117 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
1b49de26
JB		 4118 netdev_info(sdata->dev,
4119 "disabling VHT as WMM/QoS is not supported by the AP\n");
d545daba
MP		 4120 }
4121
ef96a842
BG		 4122 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4123 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4124 sizeof(ifmgd->ht_capa_mask));
4125
dd5ecfea
JB		 4126 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4127 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4128 sizeof(ifmgd->vht_capa_mask));
4129
77fdaa12 4130 if (req->ie && req->ie_len) {
66e67e41
JB		 4131 memcpy(assoc_data->ie, req->ie, req->ie_len);
4132 assoc_data->ie_len = req->ie_len;
4133 }
f679f65d 4134
66e67e41 4135 assoc_data->bss = req->bss;
f679f65d 4136
af6b6374
JB		 4137 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4138 if (ifmgd->powersave)
04ecd257 4139 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
af6b6374 4140 else
04ecd257 4141 sdata->smps_mode = IEEE80211_SMPS_OFF;
af6b6374 4142 } else
04ecd257 4143 sdata->smps_mode = ifmgd->req_smps;
af6b6374 4144
66e67e41 4145 assoc_data->capability = req->bss->capability;
66e67e41
JB		 4146 assoc_data->supp_rates = bss->supp_rates;
4147 assoc_data->supp_rates_len = bss->supp_rates_len;
9dde6423 4148
9caf0364 4149 rcu_read_lock();
9dde6423
JB		 4150 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4151 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4152 assoc_data->ap_ht_param =
4153 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4154 else
a8243b72 4155 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
b08fbbd8
JB		 4156 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4157 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4158 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4159 sizeof(struct ieee80211_vht_cap));
4160 else
4161 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
9caf0364 4162 rcu_read_unlock();
63f170e0 4163
ab13315a 4164 if (bss->wmm_used && bss->uapsd_supported &&
24aa11ab
AB		 4165 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD) &&
4166 sdata->wmm_acm != 0xff) {
76f0303d 4167 assoc_data->uapsd = true;
ab13315a
KV		 4168 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4169 } else {
76f0303d 4170 assoc_data->uapsd = false;
ab13315a
KV		 4171 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4172 }
4173
77fdaa12 4174 if (req->prev_bssid)
66e67e41 4175 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12
JB		 4176
4177 if (req->use_mfp) {
4178 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4179 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4180 } else {
4181 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4182 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4183 }
4184
4185 if (req->crypto.control_port)
4186 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4187 else
4188 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4189
a621fa4d
JB		 4190 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4191 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4192
66e67e41
JB		 4193 /* kick off associate process */
4194
4195 ifmgd->assoc_data = assoc_data;
826262c3 4196 ifmgd->dtim_period = 0;
989c6505 4197 ifmgd->have_beacon = false;
66e67e41 4198
a1cf775d
JB		 4199 err = ieee80211_prep_connection(sdata, req->bss, true);
4200 if (err)
4201 goto err_clear;
66e67e41 4202
c65dd147
EG		 4203 rcu_read_lock();
4204 beacon_ies = rcu_dereference(req->bss->beacon_ies);
826262c3 4205
c65dd147
EG		 4206 if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC &&
4207 !beacon_ies) {
4208 /*
4209 * Wait up to one beacon interval ...
4210 * should this be more if we miss one?
4211 */
4212 sdata_info(sdata, "waiting for beacon from %pM\n",
4213 ifmgd->bssid);
4214 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
89afe614 4215 assoc_data->timeout_started = true;
c65dd147
EG		 4216 assoc_data->need_beacon = true;
4217 } else if (beacon_ies) {
4218 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4219 beacon_ies->data,
4220 beacon_ies->len);
ef429dad
JB		 4221 u8 dtim_count = 0;
4222
c65dd147
EG		 4223 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4224 const struct ieee80211_tim_ie *tim;
4225 tim = (void *)(tim_ie + 2);
4226 ifmgd->dtim_period = tim->dtim_period;
ef429dad 4227 dtim_count = tim->dtim_count;
826262c3 4228 }
989c6505 4229 ifmgd->have_beacon = true;
66e67e41 4230 assoc_data->timeout = jiffies;
89afe614 4231 assoc_data->timeout_started = true;
ef429dad
JB		 4232
4233 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
4234 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4235 sdata->vif.bss_conf.sync_device_ts =
4236 bss->device_ts_beacon;
4237 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4238 }
c65dd147
EG		 4239 } else {
4240 assoc_data->timeout = jiffies;
89afe614 4241 assoc_data->timeout_started = true;
66e67e41 4242 }
c65dd147
EG		 4243 rcu_read_unlock();
4244
8d61ffa5 4245 run_again(sdata, assoc_data->timeout);
66e67e41 4246
fcff4f10
PS		 4247 if (bss->corrupt_data) {
4248 char *corrupt_type = "data";
4249 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4250 if (bss->corrupt_data &
4251 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4252 corrupt_type = "beacon and probe response";
4253 else
4254 corrupt_type = "beacon";
4255 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4256 corrupt_type = "probe response";
bdcbd8e0
JB		 4257 sdata_info(sdata, "associating with AP with corrupt %s\n",
4258 corrupt_type);
fcff4f10
PS		 4259 }
4260
8d61ffa5 4261 return 0;
66e67e41 4262 err_clear:
3d2abdfd
EP		 4263 memset(ifmgd->bssid, 0, ETH_ALEN);
4264 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 4265 ifmgd->assoc_data = NULL;
4266 err_free:
4267 kfree(assoc_data);
66e67e41 4268 return err;
f0706e82
JB		 4269}
4270
77fdaa12 4271int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
63c9c5e7 4272 struct cfg80211_deauth_request *req)
f0706e82 4273{
46900298 4274 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 4275 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
6863255b 4276 bool tx = !req->local_state_change;
de3d43a3 4277 bool report_frame = false;
f0706e82 4278
bdcbd8e0
JB		 4279 sdata_info(sdata,
4280 "deauthenticating from %pM by local choice (reason=%d)\n",
4281 req->bssid, req->reason_code);
0ff71613 4282
86552017 4283 if (ifmgd->auth_data) {
8c7d857c 4284 drv_mgd_prepare_tx(sdata->local, sdata);
37ad3888
JB		 4285 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4286 IEEE80211_STYPE_DEAUTH,
6863255b 4287 req->reason_code, tx,
37ad3888 4288 frame_buf);
86552017 4289 ieee80211_destroy_auth_data(sdata, false);
86552017 4290
de3d43a3 4291 report_frame = true;
86552017 4292 goto out;
8c7d857c
EG		 4293 }
4294
86552017
JB		 4295 if (ifmgd->associated &&
4296 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
4297 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4298 req->reason_code, tx, frame_buf);
de3d43a3 4299 report_frame = true;
86552017 4300 }
37ad3888 4301
86552017 4302 out:
de3d43a3 4303 if (report_frame)
6ff57cf8
JB		 4304 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4305 IEEE80211_DEAUTH_FRAME_LEN);
86552017 4306
f0706e82
JB		 4307 return 0;
4308}
84363e6e 4309
77fdaa12 4310int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 4311 struct cfg80211_disassoc_request *req)
9c6bd790 4312{
77fdaa12 4313 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 4314 u8 bssid[ETH_ALEN];
6ae16775 4315 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
9c6bd790 4316
8d8b261a
JB		 4317 /*
4318 * cfg80211 should catch this ... but it's racy since
4319 * we can receive a disassoc frame, process it, hand it
4320 * to cfg80211 while that's in a locked section already
4321 * trying to tell us that the user wants to disconnect.
4322 */
8d61ffa5 4323 if (ifmgd->associated != req->bss)
77fdaa12 4324 return -ENOLINK;
77fdaa12 4325
bdcbd8e0
JB		 4326 sdata_info(sdata,
4327 "disassociating from %pM by local choice (reason=%d)\n",
4328 req->bss->bssid, req->reason_code);
0ff71613 4329
e69e95db 4330 memcpy(bssid, req->bss->bssid, ETH_ALEN);
37ad3888
JB		 4331 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4332 req->reason_code, !req->local_state_change,
4333 frame_buf);
10f644a4 4334
6ff57cf8
JB		 4335 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4336 IEEE80211_DEAUTH_FRAME_LEN);
bc83b681 4337
10f644a4
JB		 4338 return 0;
4339}
026331c4 4340
afa762f6 4341void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
54e4ffb2
JB		 4342{
4343 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4344
49921859
BG		 4345 /*
4346 * Make sure some work items will not run after this,
4347 * they will not do anything but might not have been
4348 * cancelled when disconnecting.
4349 */
4350 cancel_work_sync(&ifmgd->monitor_work);
4351 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
4352 cancel_work_sync(&ifmgd->request_smps_work);
4353 cancel_work_sync(&ifmgd->csa_connection_drop_work);
4354 cancel_work_sync(&ifmgd->chswitch_work);
4355
8d61ffa5 4356 sdata_lock(sdata);
959867fa
JB		 4357 if (ifmgd->assoc_data) {
4358 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
54e4ffb2 4359 ieee80211_destroy_assoc_data(sdata, false);
959867fa
JB		 4360 cfg80211_assoc_timeout(sdata->dev, bss);
4361 }
54e4ffb2
JB		 4362 if (ifmgd->auth_data)
4363 ieee80211_destroy_auth_data(sdata, false);
4364 del_timer_sync(&ifmgd->timer);
8d61ffa5 4365 sdata_unlock(sdata);
54e4ffb2
JB		 4366}
4367
a97c13c3
JO		 4368void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
4369 enum nl80211_cqm_rssi_threshold_event rssi_event,
4370 gfp_t gfp)
4371{
4372 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4373
b5878a2d
JB		 4374 trace_api_cqm_rssi_notify(sdata, rssi_event);
4375
a97c13c3
JO		 4376 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
4377}
4378EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
ubuntu-bionic-kernel mirror