projects / deliverable / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
mac80211: use secondary channel offset IE also beacons during CSA
[deliverable/linux.git] / net / mac80211 / mlme.c
CommitLineData
f0706e82
JB		 1/*
2 * BSS client mode implementation
5394af4d 3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
f0706e82
JB		 4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
d98ad83e 8 * Copyright 2013-2014 Intel Mobile Communications GmbH
f0706e82
JB		 9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
13 */
14
5b323edb 15#include <linux/delay.h>
f0706e82
JB		 16#include <linux/if_ether.h>
17#include <linux/skbuff.h>
f0706e82 18#include <linux/if_arp.h>
f0706e82 19#include <linux/etherdevice.h>
d9b93842 20#include <linux/moduleparam.h>
d0709a65 21#include <linux/rtnetlink.h>
e8db0be1 22#include <linux/pm_qos.h>
d91f36db 23#include <linux/crc32.h>
5a0e3ad6 24#include <linux/slab.h>
bc3b2d7f 25#include <linux/export.h>
f0706e82 26#include <net/mac80211.h>
472dbc45 27#include <asm/unaligned.h>
60f8b39c 28
f0706e82 29#include "ieee80211_i.h"
24487981 30#include "driver-ops.h"
2c8dccc7
JB		 31#include "rate.h"
32#include "led.h"
f0706e82 33
1672c0e3 34#define IEEE80211_AUTH_TIMEOUT (HZ / 5)
cb236d2d 35#define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2)
1672c0e3
JB		 36#define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10)
37#define IEEE80211_AUTH_MAX_TRIES 3
38#define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
39#define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
cb236d2d 40#define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2)
1672c0e3
JB		 41#define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10)
42#define IEEE80211_ASSOC_MAX_TRIES 3
66e67e41 43
180205bd
BG		 44static int max_nullfunc_tries = 2;
45module_param(max_nullfunc_tries, int, 0644);
46MODULE_PARM_DESC(max_nullfunc_tries,
47 "Maximum nullfunc tx tries before disconnecting (reason 4).");
48
49static int max_probe_tries = 5;
50module_param(max_probe_tries, int, 0644);
51MODULE_PARM_DESC(max_probe_tries,
52 "Maximum probe tries before disconnecting (reason 4).");
b291ba11
JB		 53
54/*
7ccc8bd7
FF		 55 * Beacon loss timeout is calculated as N frames times the
56 * advertised beacon interval. This may need to be somewhat
57 * higher than what hardware might detect to account for
58 * delays in the host processing frames. But since we also
59 * probe on beacon miss before declaring the connection lost
60 * default to what we want.
b291ba11 61 */
59c1ec2b
BG		 62static int beacon_loss_count = 7;
63module_param(beacon_loss_count, int, 0644);
64MODULE_PARM_DESC(beacon_loss_count,
65 "Number of beacon intervals before we decide beacon was lost.");
7ccc8bd7 66
b291ba11
JB		 67/*
68 * Time the connection can be idle before we probe
69 * it to see if we can still talk to the AP.
70 */
d1c5091f 71#define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
b291ba11
JB		 72/*
73 * Time we wait for a probe response after sending
74 * a probe request because of beacon loss or for
75 * checking the connection still works.
76 */
180205bd
BG		 77static int probe_wait_ms = 500;
78module_param(probe_wait_ms, int, 0644);
79MODULE_PARM_DESC(probe_wait_ms,
80 "Maximum time(ms) to wait for probe response"
81 " before disconnecting (reason 4).");
f0706e82 82
17e4ec14
JM		 83/*
84 * Weight given to the latest Beacon frame when calculating average signal
85 * strength for Beacon frames received in the current BSS. This must be
86 * between 1 and 15.
87 */
88#define IEEE80211_SIGNAL_AVE_WEIGHT 3
89
391a200a
JM		 90/*
91 * How many Beacon frames need to have been used in average signal strength
92 * before starting to indicate signal change events.
93 */
94#define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
95
ca386f31
JB		 96/*
97 * We can have multiple work items (and connection probing)
98 * scheduling this timer, but we need to take care to only
99 * reschedule it when it should fire _earlier_ than it was
100 * asked for before, or if it's not pending right now. This
101 * function ensures that. Note that it then is required to
102 * run this function for all timeouts after the first one
103 * has happened -- the work that runs from this timer will
104 * do that.
105 */
8d61ffa5
JB		 106static void run_again(struct ieee80211_sub_if_data *sdata,
107 unsigned long timeout)
ca386f31 108{
8d61ffa5 109 sdata_assert_lock(sdata);
ca386f31 110
8d61ffa5
JB		 111 if (!timer_pending(&sdata->u.mgd.timer) ||
112 time_before(timeout, sdata->u.mgd.timer.expires))
113 mod_timer(&sdata->u.mgd.timer, timeout);
ca386f31
JB		 114}
115
d3a910a8 116void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
b291ba11 117{
c1288b12 118 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
b291ba11
JB		 119 return;
120
7eeff74c
JB		 121 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
122 return;
123
b291ba11 124 mod_timer(&sdata->u.mgd.bcn_mon_timer,
7ccc8bd7 125 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
b291ba11
JB		 126}
127
be099e82
LR		 128void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
129{
0c699c3a
LR		 130 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
131
8628172f
SG		 132 if (unlikely(!sdata->u.mgd.associated))
133 return;
134
448cd2e2
EP		 135 ifmgd->probe_send_count = 0;
136
be099e82
LR		 137 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
138 return;
139
140 mod_timer(&sdata->u.mgd.conn_mon_timer,
141 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
142}
143
5484e237 144static int ecw2cw(int ecw)
60f8b39c 145{
5484e237 146 return (1 << ecw) - 1;
60f8b39c
JB		 147}
148
6565ec9b
JB		 149static u32
150ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
151 struct ieee80211_supported_band *sband,
152 struct ieee80211_channel *channel,
53b954ee 153 const struct ieee80211_ht_cap *ht_cap,
6565ec9b
JB		 154 const struct ieee80211_ht_operation *ht_oper,
155 const struct ieee80211_vht_operation *vht_oper,
5cdaed1e 156 struct cfg80211_chan_def *chandef, bool tracking)
6565ec9b 157{
5cdaed1e 158 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6565ec9b
JB		 159 struct cfg80211_chan_def vht_chandef;
160 u32 ht_cfreq, ret;
161
162 chandef->chan = channel;
163 chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
164 chandef->center_freq1 = channel->center_freq;
165 chandef->center_freq2 = 0;
166
53b954ee 167 if (!ht_cap || !ht_oper || !sband->ht_cap.ht_supported) {
6565ec9b
JB		 168 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
169 goto out;
170 }
171
172 chandef->width = NL80211_CHAN_WIDTH_20;
173
53b954ee
EP		 174 if (!(ht_cap->cap_info &
175 cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40))) {
f3000e1b 176 ret = IEEE80211_STA_DISABLE_40MHZ;
53b954ee
EP		 177 goto out;
178 }
179
6565ec9b
JB		 180 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
181 channel->band);
182 /* check that channel matches the right operating channel */
5cdaed1e 183 if (!tracking && channel->center_freq != ht_cfreq) {
6565ec9b
JB		 184 /*
185 * It's possible that some APs are confused here;
186 * Netgear WNDR3700 sometimes reports 4 higher than
187 * the actual channel in association responses, but
188 * since we look at probe response/beacon data here
189 * it should be OK.
190 */
5cdaed1e
JB		 191 sdata_info(sdata,
192 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
193 channel->center_freq, ht_cfreq,
194 ht_oper->primary_chan, channel->band);
6565ec9b
JB		 195 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
196 goto out;
197 }
198
199 /* check 40 MHz support, if we have it */
200 if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
201 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
202 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
203 chandef->width = NL80211_CHAN_WIDTH_40;
204 chandef->center_freq1 += 10;
205 break;
206 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
207 chandef->width = NL80211_CHAN_WIDTH_40;
208 chandef->center_freq1 -= 10;
209 break;
210 }
211 } else {
212 /* 40 MHz (and 80 MHz) must be supported for VHT */
213 ret = IEEE80211_STA_DISABLE_VHT;
85220d71
JB		 214 /* also mark 40 MHz disabled */
215 ret |= IEEE80211_STA_DISABLE_40MHZ;
6565ec9b
JB		 216 goto out;
217 }
218
219 if (!vht_oper || !sband->vht_cap.vht_supported) {
220 ret = IEEE80211_STA_DISABLE_VHT;
221 goto out;
222 }
223
224 vht_chandef.chan = channel;
225 vht_chandef.center_freq1 =
226 ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx,
227 channel->band);
228 vht_chandef.center_freq2 = 0;
229
6565ec9b
JB		 230 switch (vht_oper->chan_width) {
231 case IEEE80211_VHT_CHANWIDTH_USE_HT:
232 vht_chandef.width = chandef->width;
cb664981 233 vht_chandef.center_freq1 = chandef->center_freq1;
6565ec9b
JB		 234 break;
235 case IEEE80211_VHT_CHANWIDTH_80MHZ:
236 vht_chandef.width = NL80211_CHAN_WIDTH_80;
237 break;
238 case IEEE80211_VHT_CHANWIDTH_160MHZ:
239 vht_chandef.width = NL80211_CHAN_WIDTH_160;
240 break;
241 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
242 vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
6553bf04
JB		 243 vht_chandef.center_freq2 =
244 ieee80211_channel_to_frequency(
245 vht_oper->center_freq_seg2_idx,
246 channel->band);
6565ec9b
JB		 247 break;
248 default:
5cdaed1e 249 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
30eb1dc2
JB		 250 sdata_info(sdata,
251 "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
252 vht_oper->chan_width);
6565ec9b
JB		 253 ret = IEEE80211_STA_DISABLE_VHT;
254 goto out;
255 }
256
257 if (!cfg80211_chandef_valid(&vht_chandef)) {
5cdaed1e 258 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
30eb1dc2
JB		 259 sdata_info(sdata,
260 "AP VHT information is invalid, disable VHT\n");
6565ec9b
JB		 261 ret = IEEE80211_STA_DISABLE_VHT;
262 goto out;
263 }
264
265 if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
266 ret = 0;
267 goto out;
268 }
269
270 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
5cdaed1e 271 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
30eb1dc2
JB		 272 sdata_info(sdata,
273 "AP VHT information doesn't match HT, disable VHT\n");
6565ec9b
JB		 274 ret = IEEE80211_STA_DISABLE_VHT;
275 goto out;
276 }
277
278 *chandef = vht_chandef;
279
280 ret = 0;
281
282out:
963a1852
JB		 283 /*
284 * When tracking the current AP, don't do any further checks if the
285 * new chandef is identical to the one we're currently using for the
286 * connection. This keeps us from playing ping-pong with regulatory,
287 * without it the following can happen (for example):
288 * - connect to an AP with 80 MHz, world regdom allows 80 MHz
289 * - AP advertises regdom US
290 * - CRDA loads regdom US with 80 MHz prohibited (old database)
291 * - the code below detects an unsupported channel, downgrades, and
292 * we disconnect from the AP in the caller
293 * - disconnect causes CRDA to reload world regdomain and the game
294 * starts anew.
295 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
296 *
297 * It seems possible that there are still scenarios with CSA or real
298 * bandwidth changes where a this could happen, but those cases are
299 * less common and wouldn't completely prevent using the AP.
300 */
301 if (tracking &&
302 cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef))
303 return ret;
304
586e01ed
JB		 305 /* don't print the message below for VHT mismatch if VHT is disabled */
306 if (ret & IEEE80211_STA_DISABLE_VHT)
307 vht_chandef = *chandef;
308
ddfe49b4
JB		 309 /*
310 * Ignore the DISABLED flag when we're already connected and only
311 * tracking the APs beacon for bandwidth changes - otherwise we
312 * might get disconnected here if we connect to an AP, update our
313 * regulatory information based on the AP's country IE and the
314 * information we have is wrong/outdated and disables the channel
315 * that we're actually using for the connection to the AP.
316 */
6565ec9b 317 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
ddfe49b4
JB		 318 tracking ? 0 :
319 IEEE80211_CHAN_DISABLED)) {
6565ec9b
JB		 320 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
321 ret = IEEE80211_STA_DISABLE_HT |
322 IEEE80211_STA_DISABLE_VHT;
b56e4b85 323 break;
6565ec9b
JB		 324 }
325
e6b7cde4 326 ret |= ieee80211_chandef_downgrade(chandef);
6565ec9b
JB		 327 }
328
5cdaed1e 329 if (chandef->width != vht_chandef.width && !tracking)
6565ec9b
JB		 330 sdata_info(sdata,
331 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
332
333 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
334 return ret;
335}
336
30eb1dc2
JB		 337static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
338 struct sta_info *sta,
53b954ee 339 const struct ieee80211_ht_cap *ht_cap,
30eb1dc2
JB		 340 const struct ieee80211_ht_operation *ht_oper,
341 const struct ieee80211_vht_operation *vht_oper,
342 const u8 *bssid, u32 *changed)
d5522e03
JB		 343{
344 struct ieee80211_local *local = sdata->local;
30eb1dc2 345 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d5522e03 346 struct ieee80211_supported_band *sband;
55de908a 347 struct ieee80211_channel *chan;
30eb1dc2 348 struct cfg80211_chan_def chandef;
9ed6bcce 349 u16 ht_opmode;
30eb1dc2
JB		 350 u32 flags;
351 enum ieee80211_sta_rx_bandwidth new_sta_bw;
352 int ret;
d5522e03 353
30eb1dc2
JB		 354 /* if HT was/is disabled, don't track any bandwidth changes */
355 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
1128958d
JB		 356 return 0;
357
30eb1dc2
JB		 358 /* don't check VHT if we associated as non-VHT station */
359 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
360 vht_oper = NULL;
361
362 if (WARN_ON_ONCE(!sta))
363 return -EINVAL;
364
017b45bb
AA		 365 /*
366 * if bss configuration changed store the new one -
367 * this may be applicable even if channel is identical
368 */
369 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
370 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
371 *changed |= BSS_CHANGED_HT;
372 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
373 }
374
f2d9330e 375 chan = sdata->vif.bss_conf.chandef.chan;
55de908a 376 sband = local->hw.wiphy->bands[chan->band];
d5522e03 377
30eb1dc2 378 /* calculate new channel (type) based on HT/VHT operation IEs */
53b954ee
EP		 379 flags = ieee80211_determine_chantype(sdata, sband, chan,
380 ht_cap, ht_oper, vht_oper,
381 &chandef, true);
30eb1dc2
JB		 382
383 /*
384 * Downgrade the new channel if we associated with restricted
385 * capabilities. For example, if we associated as a 20 MHz STA
386 * to a 40 MHz AP (due to regulatory, capabilities or config
387 * reasons) then switching to a 40 MHz channel now won't do us
388 * any good -- we couldn't use it with the AP.
389 */
390 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
391 chandef.width == NL80211_CHAN_WIDTH_80P80)
e6b7cde4 392 flags |= ieee80211_chandef_downgrade(&chandef);
30eb1dc2
JB		 393 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
394 chandef.width == NL80211_CHAN_WIDTH_160)
e6b7cde4 395 flags |= ieee80211_chandef_downgrade(&chandef);
30eb1dc2
JB		 396 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
397 chandef.width > NL80211_CHAN_WIDTH_20)
e6b7cde4 398 flags |= ieee80211_chandef_downgrade(&chandef);
30eb1dc2
JB		 399
400 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
401 return 0;
402
403 sdata_info(sdata,
404 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
405 ifmgd->bssid, chandef.chan->center_freq, chandef.width,
406 chandef.center_freq1, chandef.center_freq2);
407
408 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
409 IEEE80211_STA_DISABLE_VHT |
410 IEEE80211_STA_DISABLE_40MHZ |
411 IEEE80211_STA_DISABLE_80P80MHZ |
412 IEEE80211_STA_DISABLE_160MHZ)) ||
413 !cfg80211_chandef_valid(&chandef)) {
414 sdata_info(sdata,
415 "AP %pM changed bandwidth in a way we can't support - disconnect\n",
416 ifmgd->bssid);
417 return -EINVAL;
418 }
419
420 switch (chandef.width) {
421 case NL80211_CHAN_WIDTH_20_NOHT:
422 case NL80211_CHAN_WIDTH_20:
423 new_sta_bw = IEEE80211_STA_RX_BW_20;
424 break;
4bf88530 425 case NL80211_CHAN_WIDTH_40:
30eb1dc2 426 new_sta_bw = IEEE80211_STA_RX_BW_40;
64f68e5d 427 break;
30eb1dc2
JB		 428 case NL80211_CHAN_WIDTH_80:
429 new_sta_bw = IEEE80211_STA_RX_BW_80;
430 break;
431 case NL80211_CHAN_WIDTH_80P80:
432 case NL80211_CHAN_WIDTH_160:
433 new_sta_bw = IEEE80211_STA_RX_BW_160;
64f68e5d 434 break;
30eb1dc2
JB		 435 default:
436 return -EINVAL;
64f68e5d 437 }
d5522e03 438
30eb1dc2
JB		 439 if (new_sta_bw > sta->cur_max_bandwidth)
440 new_sta_bw = sta->cur_max_bandwidth;
64f68e5d 441
30eb1dc2
JB		 442 if (new_sta_bw < sta->sta.bandwidth) {
443 sta->sta.bandwidth = new_sta_bw;
444 rate_control_rate_update(local, sband, sta,
445 IEEE80211_RC_BW_CHANGED);
446 }
64f68e5d 447
30eb1dc2
JB		 448 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
449 if (ret) {
450 sdata_info(sdata,
451 "AP %pM changed bandwidth to incompatible one - disconnect\n",
452 ifmgd->bssid);
453 return ret;
454 }
7cc44ed4 455
30eb1dc2
JB		 456 if (new_sta_bw > sta->sta.bandwidth) {
457 sta->sta.bandwidth = new_sta_bw;
458 rate_control_rate_update(local, sband, sta,
459 IEEE80211_RC_BW_CHANGED);
0aaffa9b 460 }
d5522e03 461
30eb1dc2 462 return 0;
d5522e03
JB		 463}
464
9c6bd790
JB		 465/* frame sending functions */
466
66e67e41 467static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
9dde6423 468 struct sk_buff *skb, u8 ap_ht_param,
66e67e41
JB		 469 struct ieee80211_supported_band *sband,
470 struct ieee80211_channel *channel,
471 enum ieee80211_smps_mode smps)
472{
66e67e41
JB		 473 u8 *pos;
474 u32 flags = channel->flags;
475 u16 cap;
476 struct ieee80211_sta_ht_cap ht_cap;
477
478 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
479
66e67e41
JB		 480 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
481 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
482
66e67e41
JB		 483 /* determine capability flags */
484 cap = ht_cap.cap;
485
9dde6423 486 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
66e67e41
JB		 487 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
488 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
489 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
490 cap &= ~IEEE80211_HT_CAP_SGI_40;
491 }
492 break;
493 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
494 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
495 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
496 cap &= ~IEEE80211_HT_CAP_SGI_40;
497 }
498 break;
499 }
500
24398e39
JB		 501 /*
502 * If 40 MHz was disabled associate as though we weren't
503 * capable of 40 MHz -- some broken APs will never fall
504 * back to trying to transmit in 20 MHz.
505 */
506 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
507 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
508 cap &= ~IEEE80211_HT_CAP_SGI_40;
509 }
510
66e67e41
JB		 511 /* set SM PS mode properly */
512 cap &= ~IEEE80211_HT_CAP_SM_PS;
513 switch (smps) {
514 case IEEE80211_SMPS_AUTOMATIC:
515 case IEEE80211_SMPS_NUM_MODES:
516 WARN_ON(1);
517 case IEEE80211_SMPS_OFF:
518 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
519 IEEE80211_HT_CAP_SM_PS_SHIFT;
520 break;
521 case IEEE80211_SMPS_STATIC:
522 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
523 IEEE80211_HT_CAP_SM_PS_SHIFT;
524 break;
525 case IEEE80211_SMPS_DYNAMIC:
526 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
527 IEEE80211_HT_CAP_SM_PS_SHIFT;
528 break;
529 }
530
531 /* reserve and fill IE */
532 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
533 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
534}
535
d545daba
MP		 536static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
537 struct sk_buff *skb,
b08fbbd8
JB		 538 struct ieee80211_supported_band *sband,
539 struct ieee80211_vht_cap *ap_vht_cap)
d545daba
MP		 540{
541 u8 *pos;
542 u32 cap;
543 struct ieee80211_sta_vht_cap vht_cap;
c1cf6d4e 544 u32 mask, ap_bf_sts, our_bf_sts;
d545daba
MP		 545
546 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
547
548 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
dd5ecfea 549 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
d545daba
MP		 550
551 /* determine capability flags */
552 cap = vht_cap.cap;
553
f2d9d270
JB		 554 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
555 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ;
556 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
557 }
558
559 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
560 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
561 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
562 }
563
b08fbbd8
JB		 564 /*
565 * Some APs apparently get confused if our capabilities are better
566 * than theirs, so restrict what we advertise in the assoc request.
567 */
568 if (!(ap_vht_cap->vht_cap_info &
569 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
570 cap &= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE;
571
c1cf6d4e
ES		 572 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK;
573
574 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask;
575 our_bf_sts = cap & mask;
576
577 if (ap_bf_sts < our_bf_sts) {
578 cap &= ~mask;
579 cap |= ap_bf_sts;
580 }
581
d545daba 582 /* reserve and fill IE */
d4950281 583 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
d545daba
MP		 584 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
585}
586
66e67e41
JB		 587static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
588{
589 struct ieee80211_local *local = sdata->local;
590 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
591 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
592 struct sk_buff *skb;
593 struct ieee80211_mgmt *mgmt;
594 u8 *pos, qos_info;
595 size_t offset = 0, noffset;
2103dec1 596 int i, count, rates_len, supp_rates_len, shift;
66e67e41
JB		 597 u16 capab;
598 struct ieee80211_supported_band *sband;
55de908a
JB		 599 struct ieee80211_chanctx_conf *chanctx_conf;
600 struct ieee80211_channel *chan;
2103dec1 601 u32 rate_flags, rates = 0;
66e67e41 602
8d61ffa5 603 sdata_assert_lock(sdata);
66e67e41 604
55de908a
JB		 605 rcu_read_lock();
606 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
607 if (WARN_ON(!chanctx_conf)) {
608 rcu_read_unlock();
609 return;
610 }
4bf88530 611 chan = chanctx_conf->def.chan;
2103dec1 612 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
55de908a
JB		 613 rcu_read_unlock();
614 sband = local->hw.wiphy->bands[chan->band];
2103dec1 615 shift = ieee80211_vif_get_shift(&sdata->vif);
66e67e41
JB		 616
617 if (assoc_data->supp_rates_len) {
618 /*
619 * Get all rates supported by the device and the AP as
620 * some APs don't like getting a superset of their rates
621 * in the association request (e.g. D-Link DAP 1353 in
622 * b-only mode)...
623 */
2103dec1
SW		 624 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
625 assoc_data->supp_rates,
626 assoc_data->supp_rates_len,
627 &rates);
66e67e41
JB		 628 } else {
629 /*
630 * In case AP not provide any supported rates information
631 * before association, we send information element(s) with
632 * all rates that we support.
633 */
2103dec1
SW		 634 rates_len = 0;
635 for (i = 0; i < sband->n_bitrates; i++) {
636 if ((rate_flags & sband->bitrates[i].flags)
637 != rate_flags)
638 continue;
639 rates |= BIT(i);
640 rates_len++;
641 }
66e67e41
JB		 642 }
643
644 skb = alloc_skb(local->hw.extra_tx_headroom +
645 sizeof(*mgmt) + /* bit too much but doesn't matter */
646 2 + assoc_data->ssid_len + /* SSID */
647 4 + rates_len + /* (extended) rates */
648 4 + /* power capability */
649 2 + 2 * sband->n_channels + /* supported channels */
650 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
d4950281 651 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
66e67e41
JB		 652 assoc_data->ie_len + /* extra IEs */
653 9, /* WMM */
654 GFP_KERNEL);
655 if (!skb)
656 return;
657
658 skb_reserve(skb, local->hw.extra_tx_headroom);
659
660 capab = WLAN_CAPABILITY_ESS;
661
662 if (sband->band == IEEE80211_BAND_2GHZ) {
663 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
664 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
665 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
666 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
667 }
668
669 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
670 capab |= WLAN_CAPABILITY_PRIVACY;
671
672 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
673 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
674 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
675
cd2f5dd7
AK		 676 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM)
677 capab |= WLAN_CAPABILITY_RADIO_MEASURE;
678
66e67e41
JB		 679 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
680 memset(mgmt, 0, 24);
681 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
682 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
683 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
684
685 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
686 skb_put(skb, 10);
687 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
688 IEEE80211_STYPE_REASSOC_REQ);
689 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
690 mgmt->u.reassoc_req.listen_interval =
691 cpu_to_le16(local->hw.conf.listen_interval);
692 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
693 ETH_ALEN);
694 } else {
695 skb_put(skb, 4);
696 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
697 IEEE80211_STYPE_ASSOC_REQ);
698 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
699 mgmt->u.assoc_req.listen_interval =
700 cpu_to_le16(local->hw.conf.listen_interval);
701 }
702
703 /* SSID */
704 pos = skb_put(skb, 2 + assoc_data->ssid_len);
705 *pos++ = WLAN_EID_SSID;
706 *pos++ = assoc_data->ssid_len;
707 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
708
709 /* add all rates which were marked to be used above */
710 supp_rates_len = rates_len;
711 if (supp_rates_len > 8)
712 supp_rates_len = 8;
713
714 pos = skb_put(skb, supp_rates_len + 2);
715 *pos++ = WLAN_EID_SUPP_RATES;
716 *pos++ = supp_rates_len;
717
718 count = 0;
719 for (i = 0; i < sband->n_bitrates; i++) {
720 if (BIT(i) & rates) {
2103dec1
SW		 721 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
722 5 * (1 << shift));
723 *pos++ = (u8) rate;
66e67e41
JB		 724 if (++count == 8)
725 break;
726 }
727 }
728
729 if (rates_len > count) {
730 pos = skb_put(skb, rates_len - count + 2);
731 *pos++ = WLAN_EID_EXT_SUPP_RATES;
732 *pos++ = rates_len - count;
733
734 for (i++; i < sband->n_bitrates; i++) {
735 if (BIT(i) & rates) {
2103dec1
SW		 736 int rate;
737 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
738 5 * (1 << shift));
739 *pos++ = (u8) rate;
66e67e41
JB		 740 }
741 }
742 }
743
cd2f5dd7
AK		 744 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT ||
745 capab & WLAN_CAPABILITY_RADIO_MEASURE) {
66e67e41
JB		 746 pos = skb_put(skb, 4);
747 *pos++ = WLAN_EID_PWR_CAPABILITY;
748 *pos++ = 2;
749 *pos++ = 0; /* min tx power */
0430c883
SW		 750 /* max tx power */
751 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
cd2f5dd7 752 }
66e67e41 753
cd2f5dd7 754 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
66e67e41
JB		 755 /* TODO: get this in reg domain format */
756 pos = skb_put(skb, 2 * sband->n_channels + 2);
757 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
758 *pos++ = 2 * sband->n_channels;
759 for (i = 0; i < sband->n_channels; i++) {
760 *pos++ = ieee80211_frequency_to_channel(
761 sband->channels[i].center_freq);
762 *pos++ = 1; /* one channel in the subband*/
763 }
764 }
765
766 /* if present, add any custom IEs that go before HT */
b3f51e94 767 if (assoc_data->ie_len) {
66e67e41
JB		 768 static const u8 before_ht[] = {
769 WLAN_EID_SSID,
770 WLAN_EID_SUPP_RATES,
771 WLAN_EID_EXT_SUPP_RATES,
772 WLAN_EID_PWR_CAPABILITY,
773 WLAN_EID_SUPPORTED_CHANNELS,
774 WLAN_EID_RSN,
775 WLAN_EID_QOS_CAPA,
776 WLAN_EID_RRM_ENABLED_CAPABILITIES,
777 WLAN_EID_MOBILITY_DOMAIN,
778 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
779 };
780 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
781 before_ht, ARRAY_SIZE(before_ht),
782 offset);
783 pos = skb_put(skb, noffset - offset);
784 memcpy(pos, assoc_data->ie + offset, noffset - offset);
785 offset = noffset;
786 }
787
f2d9d270
JB		 788 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
789 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
790 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
791
a8243b72 792 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
9dde6423 793 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
04ecd257 794 sband, chan, sdata->smps_mode);
66e67e41 795
3de3802c
JB		 796 /* if present, add any custom IEs that go before VHT */
797 if (assoc_data->ie_len) {
798 static const u8 before_vht[] = {
799 WLAN_EID_SSID,
800 WLAN_EID_SUPP_RATES,
801 WLAN_EID_EXT_SUPP_RATES,
802 WLAN_EID_PWR_CAPABILITY,
803 WLAN_EID_SUPPORTED_CHANNELS,
804 WLAN_EID_RSN,
805 WLAN_EID_QOS_CAPA,
806 WLAN_EID_RRM_ENABLED_CAPABILITIES,
807 WLAN_EID_MOBILITY_DOMAIN,
808 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
809 WLAN_EID_HT_CAPABILITY,
810 WLAN_EID_BSS_COEX_2040,
811 WLAN_EID_EXT_CAPABILITY,
812 WLAN_EID_QOS_TRAFFIC_CAPA,
813 WLAN_EID_TIM_BCAST_REQ,
814 WLAN_EID_INTERWORKING,
815 };
816 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
817 before_vht, ARRAY_SIZE(before_vht),
818 offset);
819 pos = skb_put(skb, noffset - offset);
820 memcpy(pos, assoc_data->ie + offset, noffset - offset);
821 offset = noffset;
822 }
823
d545daba 824 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
b08fbbd8
JB		 825 ieee80211_add_vht_ie(sdata, skb, sband,
826 &assoc_data->ap_vht_cap);
d545daba 827
66e67e41 828 /* if present, add any custom non-vendor IEs that go after HT */
b3f51e94 829 if (assoc_data->ie_len) {
66e67e41
JB		 830 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
831 assoc_data->ie_len,
832 offset);
833 pos = skb_put(skb, noffset - offset);
834 memcpy(pos, assoc_data->ie + offset, noffset - offset);
835 offset = noffset;
836 }
837
76f0303d
JB		 838 if (assoc_data->wmm) {
839 if (assoc_data->uapsd) {
dc41e4d4
EP		 840 qos_info = ifmgd->uapsd_queues;
841 qos_info |= (ifmgd->uapsd_max_sp_len <<
66e67e41
JB		 842 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
843 } else {
844 qos_info = 0;
845 }
846
40b861a0 847 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
66e67e41
JB		 848 }
849
850 /* add any remaining custom (i.e. vendor specific here) IEs */
b3f51e94 851 if (assoc_data->ie_len) {
66e67e41
JB		 852 noffset = assoc_data->ie_len;
853 pos = skb_put(skb, noffset - offset);
854 memcpy(pos, assoc_data->ie + offset, noffset - offset);
855 }
856
a1845fc7
JB		 857 drv_mgd_prepare_tx(local, sdata);
858
66e67e41 859 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1672c0e3
JB		 860 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
861 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
862 IEEE80211_TX_INTFL_MLME_CONN_TX;
66e67e41
JB		 863 ieee80211_tx_skb(sdata, skb);
864}
865
572e0012
KV		 866void ieee80211_send_pspoll(struct ieee80211_local *local,
867 struct ieee80211_sub_if_data *sdata)
868{
572e0012
KV		 869 struct ieee80211_pspoll *pspoll;
870 struct sk_buff *skb;
572e0012 871
d8cd189e
KV		 872 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
873 if (!skb)
572e0012 874 return;
572e0012 875
d8cd189e
KV		 876 pspoll = (struct ieee80211_pspoll *) skb->data;
877 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
572e0012 878
62ae67be
JB		 879 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
880 ieee80211_tx_skb(sdata, skb);
572e0012
KV		 881}
882
965bedad
JB		 883void ieee80211_send_nullfunc(struct ieee80211_local *local,
884 struct ieee80211_sub_if_data *sdata,
885 int powersave)
886{
887 struct sk_buff *skb;
d8cd189e 888 struct ieee80211_hdr_3addr *nullfunc;
b6f35301 889 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
965bedad 890
d8cd189e
KV		 891 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
892 if (!skb)
965bedad 893 return;
965bedad 894
d8cd189e 895 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
965bedad 896 if (powersave)
d8cd189e 897 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
965bedad 898
6c17b77b
SF		 899 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
900 IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
ff40b425
PF		 901
902 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
903 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
904
392b9ffb 905 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
b6f35301
RM		 906 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
907
62ae67be 908 ieee80211_tx_skb(sdata, skb);
965bedad
JB		 909}
910
d524215f
FF		 911static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
912 struct ieee80211_sub_if_data *sdata)
913{
914 struct sk_buff *skb;
915 struct ieee80211_hdr *nullfunc;
916 __le16 fc;
917
918 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
919 return;
920
921 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
d15b8459 922 if (!skb)
d524215f 923 return;
d15b8459 924
d524215f
FF		 925 skb_reserve(skb, local->hw.extra_tx_headroom);
926
927 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
928 memset(nullfunc, 0, 30);
929 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
930 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
931 nullfunc->frame_control = fc;
932 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
933 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
934 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
935 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
936
937 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
938 ieee80211_tx_skb(sdata, skb);
939}
940
cc32abd4
JB		 941/* spectrum management related things */
942static void ieee80211_chswitch_work(struct work_struct *work)
943{
944 struct ieee80211_sub_if_data *sdata =
945 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
675a0b04 946 struct ieee80211_local *local = sdata->local;
cc32abd4 947 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
7578d575 948 int ret;
cc32abd4 949
9607e6b6 950 if (!ieee80211_sdata_running(sdata))
cc32abd4
JB		 951 return;
952
8d61ffa5 953 sdata_lock(sdata);
4c3ebc56
MK		 954 mutex_lock(&local->mtx);
955 mutex_lock(&local->chanctx_mtx);
956
77fdaa12
JB		 957 if (!ifmgd->associated)
958 goto out;
cc32abd4 959
4c3ebc56
MK		 960 if (!sdata->vif.csa_active)
961 goto out;
962
963 /*
964 * using reservation isn't immediate as it may be deferred until later
965 * with multi-vif. once reservation is complete it will re-schedule the
966 * work with no reserved_chanctx so verify chandef to check if it
967 * completed successfully
968 */
969
970 if (sdata->reserved_chanctx) {
971 /*
972 * with multi-vif csa driver may call ieee80211_csa_finish()
973 * many times while waiting for other interfaces to use their
974 * reservations
975 */
976 if (sdata->reserved_ready)
977 goto out;
978
979 ret = ieee80211_vif_use_reserved_context(sdata);
980 if (ret) {
981 sdata_info(sdata,
982 "failed to use reserved channel context, disconnecting (err=%d)\n",
983 ret);
984 ieee80211_queue_work(&sdata->local->hw,
985 &ifmgd->csa_connection_drop_work);
986 goto out;
987 }
988
989 goto out;
990 }
991
992 if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
993 &sdata->csa_chandef)) {
7578d575 994 sdata_info(sdata,
4c3ebc56 995 "failed to finalize channel switch, disconnecting\n");
7578d575
AN		 996 ieee80211_queue_work(&sdata->local->hw,
997 &ifmgd->csa_connection_drop_work);
998 goto out;
999 }
675a0b04 1000
cc32abd4 1001 /* XXX: shouldn't really modify cfg80211-owned data! */
33787fc4 1002 ifmgd->associated->channel = sdata->csa_chandef.chan;
cc32abd4 1003
59af6928 1004 sdata->vif.csa_active = false;
4c3ebc56 1005
57eebdf3 1006 /* XXX: wait for a beacon first? */
a46992b4
LC		 1007 if (sdata->csa_block_tx) {
1008 ieee80211_wake_vif_queues(local, sdata,
1009 IEEE80211_QUEUE_STOP_REASON_CSA);
1010 sdata->csa_block_tx = false;
1011 }
7578d575 1012
e5593f56
MK		 1013 ieee80211_sta_reset_beacon_monitor(sdata);
1014 ieee80211_sta_reset_conn_monitor(sdata);
1015
59af6928 1016out:
4c3ebc56
MK		 1017 mutex_unlock(&local->chanctx_mtx);
1018 mutex_unlock(&local->mtx);
8d61ffa5 1019 sdata_unlock(sdata);
cc32abd4
JB		 1020}
1021
5ce6e438
JB		 1022void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1023{
55de908a
JB		 1024 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1025 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5ce6e438
JB		 1026
1027 trace_api_chswitch_done(sdata, success);
1028 if (!success) {
882a7c69
JB		 1029 sdata_info(sdata,
1030 "driver channel switch failed, disconnecting\n");
1031 ieee80211_queue_work(&sdata->local->hw,
1032 &ifmgd->csa_connection_drop_work);
1033 } else {
1034 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
5ce6e438 1035 }
5ce6e438
JB		 1036}
1037EXPORT_SYMBOL(ieee80211_chswitch_done);
1038
cc32abd4
JB		 1039static void ieee80211_chswitch_timer(unsigned long data)
1040{
1041 struct ieee80211_sub_if_data *sdata =
1042 (struct ieee80211_sub_if_data *) data;
5bb644a0 1043
9b7d72c1 1044 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
cc32abd4
JB		 1045}
1046
37799e52 1047static void
4a3cb702 1048ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
04a161f4
JB		 1049 u64 timestamp, struct ieee802_11_elems *elems,
1050 bool beacon)
cc32abd4 1051{
b4f286a1 1052 struct ieee80211_local *local = sdata->local;
cc32abd4 1053 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
37799e52 1054 struct cfg80211_bss *cbss = ifmgd->associated;
4c3ebc56 1055 struct ieee80211_chanctx_conf *conf;
55de908a 1056 struct ieee80211_chanctx *chanctx;
e6b7cde4 1057 enum ieee80211_band current_band;
c0f17eb9 1058 struct ieee80211_csa_ie csa_ie;
e6b7cde4 1059 int res;
cc32abd4 1060
8d61ffa5 1061 sdata_assert_lock(sdata);
77fdaa12 1062
37799e52 1063 if (!cbss)
cc32abd4
JB		 1064 return;
1065
b4f286a1 1066 if (local->scanning)
cc32abd4
JB		 1067 return;
1068
37799e52 1069 /* disregard subsequent announcements if we are already processing */
3e2a0226 1070 if (sdata->vif.csa_active)
cc32abd4
JB		 1071 return;
1072
e6b7cde4 1073 current_band = cbss->channel->band;
c0f17eb9 1074 memset(&csa_ie, 0, sizeof(csa_ie));
84469a45 1075 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band,
e6b7cde4 1076 ifmgd->flags,
c0f17eb9 1077 ifmgd->associated->bssid, &csa_ie);
e6b7cde4 1078 if (res < 0)
b4f286a1 1079 ieee80211_queue_work(&local->hw,
882a7c69 1080 &ifmgd->csa_connection_drop_work);
e6b7cde4 1081 if (res)
cc32abd4 1082 return;
cd64f2a9 1083
c0f17eb9 1084 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
85220d71
JB		 1085 IEEE80211_CHAN_DISABLED)) {
1086 sdata_info(sdata,
1087 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
e6b7cde4 1088 ifmgd->associated->bssid,
c0f17eb9
CYY		 1089 csa_ie.chandef.chan->center_freq,
1090 csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1091 csa_ie.chandef.center_freq2);
85220d71
JB		 1092 ieee80211_queue_work(&local->hw,
1093 &ifmgd->csa_connection_drop_work);
1094 return;
1095 }
1096
4c3ebc56 1097 mutex_lock(&local->mtx);
7578d575 1098 mutex_lock(&local->chanctx_mtx);
4c3ebc56
MK		 1099 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1100 lockdep_is_held(&local->chanctx_mtx));
1101 if (!conf) {
1102 sdata_info(sdata,
1103 "no channel context assigned to vif?, disconnecting\n");
1104 ieee80211_queue_work(&local->hw,
1105 &ifmgd->csa_connection_drop_work);
1106 mutex_unlock(&local->chanctx_mtx);
1107 mutex_unlock(&local->mtx);
1108 return;
1109 }
1110
1111 chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1112
b4f286a1 1113 if (local->use_chanctx) {
7578d575
AN		 1114 u32 num_chanctx = 0;
1115 list_for_each_entry(chanctx, &local->chanctx_list, list)
1116 num_chanctx++;
1117
1118 if (num_chanctx > 1 ||
1119 !(local->hw.flags & IEEE80211_HW_CHANCTX_STA_CSA)) {
1120 sdata_info(sdata,
1121 "not handling chan-switch with channel contexts\n");
1122 ieee80211_queue_work(&local->hw,
1123 &ifmgd->csa_connection_drop_work);
1124 mutex_unlock(&local->chanctx_mtx);
4c3ebc56 1125 mutex_unlock(&local->mtx);
7578d575
AN		 1126 return;
1127 }
55de908a
JB		 1128 }
1129
4c3ebc56
MK		 1130 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1131 chanctx->mode, false);
1132 if (res) {
55de908a 1133 sdata_info(sdata,
4c3ebc56
MK		 1134 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1135 res);
b4f286a1 1136 ieee80211_queue_work(&local->hw,
55de908a 1137 &ifmgd->csa_connection_drop_work);
b4f286a1 1138 mutex_unlock(&local->chanctx_mtx);
4c3ebc56 1139 mutex_unlock(&local->mtx);
55de908a
JB		 1140 return;
1141 }
b4f286a1 1142 mutex_unlock(&local->chanctx_mtx);
55de908a 1143
c46a73f3 1144 sdata->vif.csa_active = true;
4c3ebc56 1145 sdata->csa_chandef = csa_ie.chandef;
59af6928 1146 sdata->csa_block_tx = csa_ie.mode;
55de908a 1147
59af6928 1148 if (sdata->csa_block_tx)
a46992b4
LC		 1149 ieee80211_stop_vif_queues(local, sdata,
1150 IEEE80211_QUEUE_STOP_REASON_CSA);
59af6928 1151 mutex_unlock(&local->mtx);
57eebdf3 1152
b4f286a1 1153 if (local->ops->channel_switch) {
5ce6e438 1154 /* use driver's channel switch callback */
57eebdf3
JB		 1155 struct ieee80211_channel_switch ch_switch = {
1156 .timestamp = timestamp,
c0f17eb9
CYY		 1157 .block_tx = csa_ie.mode,
1158 .chandef = csa_ie.chandef,
1159 .count = csa_ie.count,
57eebdf3
JB		 1160 };
1161
b4f286a1 1162 drv_channel_switch(local, &ch_switch);
5ce6e438
JB		 1163 return;
1164 }
1165
1166 /* channel switch handled in software */
c0f17eb9 1167 if (csa_ie.count <= 1)
b4f286a1 1168 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
57eebdf3 1169 else
cc32abd4 1170 mod_timer(&ifmgd->chswitch_timer,
c0f17eb9 1171 TU_TO_EXP_TIME(csa_ie.count * cbss->beacon_interval));
cc32abd4
JB		 1172}
1173
24a4e400
SG		 1174static bool
1175ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1176 struct ieee80211_channel *channel,
1177 const u8 *country_ie, u8 country_ie_len,
1178 const u8 *pwr_constr_elem,
1179 int *chan_pwr, int *pwr_reduction)
cc32abd4 1180{
04b7b2ff
JB		 1181 struct ieee80211_country_ie_triplet *triplet;
1182 int chan = ieee80211_frequency_to_channel(channel->center_freq);
24a4e400 1183 int i, chan_increment;
04b7b2ff 1184 bool have_chan_pwr = false;
cc32abd4 1185
04b7b2ff
JB		 1186 /* Invalid IE */
1187 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
24a4e400 1188 return false;
cc32abd4 1189
04b7b2ff
JB		 1190 triplet = (void *)(country_ie + 3);
1191 country_ie_len -= 3;
1192
1193 switch (channel->band) {
1194 default:
1195 WARN_ON_ONCE(1);
1196 /* fall through */
1197 case IEEE80211_BAND_2GHZ:
1198 case IEEE80211_BAND_60GHZ:
1199 chan_increment = 1;
1200 break;
1201 case IEEE80211_BAND_5GHZ:
1202 chan_increment = 4;
1203 break;
cc32abd4 1204 }
04b7b2ff
JB		 1205
1206 /* find channel */
1207 while (country_ie_len >= 3) {
1208 u8 first_channel = triplet->chans.first_channel;
1209
1210 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1211 goto next;
1212
1213 for (i = 0; i < triplet->chans.num_channels; i++) {
1214 if (first_channel + i * chan_increment == chan) {
1215 have_chan_pwr = true;
24a4e400 1216 *chan_pwr = triplet->chans.max_power;
04b7b2ff
JB		 1217 break;
1218 }
1219 }
1220 if (have_chan_pwr)
1221 break;
1222
1223 next:
1224 triplet++;
1225 country_ie_len -= 3;
1226 }
1227
24a4e400
SG		 1228 if (have_chan_pwr)
1229 *pwr_reduction = *pwr_constr_elem;
1230 return have_chan_pwr;
1231}
1232
c8d65917
SG		 1233static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
1234 struct ieee80211_channel *channel,
1235 const u8 *cisco_dtpc_ie,
1236 int *pwr_level)
1237{
1238 /* From practical testing, the first data byte of the DTPC element
1239 * seems to contain the requested dBm level, and the CLI on Cisco
1240 * APs clearly state the range is -127 to 127 dBm, which indicates
1241 * a signed byte, although it seemingly never actually goes negative.
1242 * The other byte seems to always be zero.
1243 */
1244 *pwr_level = (__s8)cisco_dtpc_ie[4];
1245}
1246
24a4e400
SG		 1247static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1248 struct ieee80211_channel *channel,
1249 struct ieee80211_mgmt *mgmt,
1250 const u8 *country_ie, u8 country_ie_len,
c8d65917
SG		 1251 const u8 *pwr_constr_ie,
1252 const u8 *cisco_dtpc_ie)
24a4e400 1253{
c8d65917
SG		 1254 bool has_80211h_pwr = false, has_cisco_pwr = false;
1255 int chan_pwr = 0, pwr_reduction_80211h = 0;
1256 int pwr_level_cisco, pwr_level_80211h;
24a4e400 1257 int new_ap_level;
04b7b2ff 1258
24a4e400
SG		 1259 if (country_ie && pwr_constr_ie &&
1260 mgmt->u.probe_resp.capab_info &
1261 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT)) {
1262 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
1263 sdata, channel, country_ie, country_ie_len,
1264 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
c8d65917
SG		 1265 pwr_level_80211h =
1266 max_t(int, 0, chan_pwr - pwr_reduction_80211h);
1267 }
1268
1269 if (cisco_dtpc_ie) {
1270 ieee80211_find_cisco_dtpc(
1271 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
1272 has_cisco_pwr = true;
24a4e400 1273 }
04b7b2ff 1274
c8d65917 1275 if (!has_80211h_pwr && !has_cisco_pwr)
1ea6f9c0 1276 return 0;
04b7b2ff 1277
c8d65917
SG		 1278 /* If we have both 802.11h and Cisco DTPC, apply both limits
1279 * by picking the smallest of the two power levels advertised.
1280 */
1281 if (has_80211h_pwr &&
1282 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
1283 sdata_info(sdata,
1284 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1285 pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
1286 sdata->u.mgd.bssid);
1287 new_ap_level = pwr_level_80211h;
1288 } else { /* has_cisco_pwr is always true here. */
1289 sdata_info(sdata,
1290 "Limiting TX power to %d dBm as advertised by %pM\n",
1291 pwr_level_cisco, sdata->u.mgd.bssid);
1292 new_ap_level = pwr_level_cisco;
1293 }
04b7b2ff 1294
1ea6f9c0
JB		 1295 if (sdata->ap_power_level == new_ap_level)
1296 return 0;
04b7b2ff 1297
1ea6f9c0
JB		 1298 sdata->ap_power_level = new_ap_level;
1299 if (__ieee80211_recalc_txpower(sdata))
1300 return BSS_CHANGED_TXPOWER;
1301 return 0;
cc32abd4
JB		 1302}
1303
965bedad
JB		 1304/* powersave */
1305static void ieee80211_enable_ps(struct ieee80211_local *local,
1306 struct ieee80211_sub_if_data *sdata)
1307{
1308 struct ieee80211_conf *conf = &local->hw.conf;
1309
d5edaedc
JB		 1310 /*
1311 * If we are scanning right now then the parameters will
1312 * take effect when scan finishes.
1313 */
fbe9c429 1314 if (local->scanning)
d5edaedc
JB		 1315 return;
1316
965bedad
JB		 1317 if (conf->dynamic_ps_timeout > 0 &&
1318 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
1319 mod_timer(&local->dynamic_ps_timer, jiffies +
1320 msecs_to_jiffies(conf->dynamic_ps_timeout));
1321 } else {
1322 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1323 ieee80211_send_nullfunc(local, sdata, 1);
375177bf 1324
2a13052f
JO		 1325 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1326 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
1327 return;
1328
1329 conf->flags |= IEEE80211_CONF_PS;
1330 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965bedad
JB		 1331 }
1332}
1333
1334static void ieee80211_change_ps(struct ieee80211_local *local)
1335{
1336 struct ieee80211_conf *conf = &local->hw.conf;
1337
1338 if (local->ps_sdata) {
965bedad
JB		 1339 ieee80211_enable_ps(local, local->ps_sdata);
1340 } else if (conf->flags & IEEE80211_CONF_PS) {
1341 conf->flags &= ~IEEE80211_CONF_PS;
1342 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1343 del_timer_sync(&local->dynamic_ps_timer);
1344 cancel_work_sync(&local->dynamic_ps_enable_work);
1345 }
1346}
1347
808118cb
JY		 1348static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1349{
1350 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1351 struct sta_info *sta = NULL;
c2c98fde 1352 bool authorized = false;
808118cb
JY		 1353
1354 if (!mgd->powersave)
1355 return false;
1356
05cb9108
JB		 1357 if (mgd->broken_ap)
1358 return false;
1359
808118cb
JY		 1360 if (!mgd->associated)
1361 return false;
1362
392b9ffb 1363 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
808118cb
JY		 1364 return false;
1365
989c6505 1366 if (!mgd->have_beacon)
ce857888
AB		 1367 return false;
1368
808118cb
JY		 1369 rcu_read_lock();
1370 sta = sta_info_get(sdata, mgd->bssid);
1371 if (sta)
c2c98fde 1372 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
808118cb
JY		 1373 rcu_read_unlock();
1374
c2c98fde 1375 return authorized;
808118cb
JY		 1376}
1377
965bedad 1378/* need to hold RTNL or interface lock */
10f644a4 1379void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 1380{
1381 struct ieee80211_sub_if_data *sdata, *found = NULL;
1382 int count = 0;
195e294d 1383 int timeout;
965bedad
JB		 1384
1385 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
1386 local->ps_sdata = NULL;
1387 return;
1388 }
1389
1390 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 1391 if (!ieee80211_sdata_running(sdata))
965bedad 1392 continue;
8c7914de
RM		 1393 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1394 /* If an AP vif is found, then disable PS
1395 * by setting the count to zero thereby setting
1396 * ps_sdata to NULL.
1397 */
1398 count = 0;
1399 break;
1400 }
965bedad
JB		 1401 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1402 continue;
1403 found = sdata;
1404 count++;
1405 }
1406
808118cb 1407 if (count == 1 && ieee80211_powersave_allowed(found)) {
10f644a4
JB		 1408 s32 beaconint_us;
1409
1410 if (latency < 0)
ed77134b 1411 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
10f644a4
JB		 1412
1413 beaconint_us = ieee80211_tu_to_usec(
1414 found->vif.bss_conf.beacon_int);
1415
ff616381 1416 timeout = local->dynamic_ps_forced_timeout;
195e294d
JO		 1417 if (timeout < 0) {
1418 /*
ff616381
JO		 1419 * Go to full PSM if the user configures a very low
1420 * latency requirement.
0ab82b04
EP		 1421 * The 2000 second value is there for compatibility
1422 * until the PM_QOS_NETWORK_LATENCY is configured
1423 * with real values.
195e294d 1424 */
0ab82b04
EP		 1425 if (latency > (1900 * USEC_PER_MSEC) &&
1426 latency != (2000 * USEC_PER_SEC))
195e294d 1427 timeout = 0;
ff616381
JO		 1428 else
1429 timeout = 100;
195e294d 1430 }
09b85568 1431 local->hw.conf.dynamic_ps_timeout = timeout;
195e294d 1432
04fe2037 1433 if (beaconint_us > latency) {
10f644a4 1434 local->ps_sdata = NULL;
04fe2037 1435 } else {
04fe2037 1436 int maxslp = 1;
826262c3 1437 u8 dtimper = found->u.mgd.dtim_period;
56007a02
JB		 1438
1439 /* If the TIM IE is invalid, pretend the value is 1 */
1440 if (!dtimper)
1441 dtimper = 1;
1442 else if (dtimper > 1)
04fe2037
JB		 1443 maxslp = min_t(int, dtimper,
1444 latency / beaconint_us);
1445
9ccebe61 1446 local->hw.conf.max_sleep_period = maxslp;
56007a02 1447 local->hw.conf.ps_dtim_period = dtimper;
10f644a4 1448 local->ps_sdata = found;
04fe2037 1449 }
10f644a4 1450 } else {
965bedad 1451 local->ps_sdata = NULL;
10f644a4 1452 }
965bedad
JB		 1453
1454 ieee80211_change_ps(local);
1455}
1456
ab095877
EP		 1457void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1458{
1459 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1460
1461 if (sdata->vif.bss_conf.ps != ps_allowed) {
1462 sdata->vif.bss_conf.ps = ps_allowed;
1463 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1464 }
1465}
1466
965bedad
JB		 1467void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1468{
1469 struct ieee80211_local *local =
1470 container_of(work, struct ieee80211_local,
1471 dynamic_ps_disable_work);
1472
1473 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1474 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1475 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1476 }
1477
1478 ieee80211_wake_queues_by_reason(&local->hw,
445ea4e8 1479 IEEE80211_MAX_QUEUE_MAP,
cca07b00
LC		 1480 IEEE80211_QUEUE_STOP_REASON_PS,
1481 false);
965bedad
JB		 1482}
1483
1484void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1485{
1486 struct ieee80211_local *local =
1487 container_of(work, struct ieee80211_local,
1488 dynamic_ps_enable_work);
1489 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
5e34069c 1490 struct ieee80211_if_managed *ifmgd;
1ddc2867
RM		 1491 unsigned long flags;
1492 int q;
965bedad
JB		 1493
1494 /* can only happen when PS was just disabled anyway */
1495 if (!sdata)
1496 return;
1497
5e34069c
CL		 1498 ifmgd = &sdata->u.mgd;
1499
965bedad
JB		 1500 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1501 return;
1502
09b85568 1503 if (local->hw.conf.dynamic_ps_timeout > 0) {
77b7023a
AN		 1504 /* don't enter PS if TX frames are pending */
1505 if (drv_tx_frames_pending(local)) {
1ddc2867
RM		 1506 mod_timer(&local->dynamic_ps_timer, jiffies +
1507 msecs_to_jiffies(
1508 local->hw.conf.dynamic_ps_timeout));
1509 return;
1510 }
77b7023a
AN		 1511
1512 /*
1513 * transmission can be stopped by others which leads to
1514 * dynamic_ps_timer expiry. Postpone the ps timer if it
1515 * is not the actual idle state.
1516 */
1517 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1518 for (q = 0; q < local->hw.queues; q++) {
1519 if (local->queue_stop_reasons[q]) {
1520 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1521 flags);
1522 mod_timer(&local->dynamic_ps_timer, jiffies +
1523 msecs_to_jiffies(
1524 local->hw.conf.dynamic_ps_timeout));
1525 return;
1526 }
1527 }
1528 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1ddc2867 1529 }
1ddc2867 1530
375177bf 1531 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
9c38a8b4 1532 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
a1598383 1533 if (drv_tx_frames_pending(local)) {
e8306f98
VN		 1534 mod_timer(&local->dynamic_ps_timer, jiffies +
1535 msecs_to_jiffies(
1536 local->hw.conf.dynamic_ps_timeout));
a1598383 1537 } else {
e8306f98
VN		 1538 ieee80211_send_nullfunc(local, sdata, 1);
1539 /* Flush to get the tx status of nullfunc frame */
39ecc01d 1540 ieee80211_flush_queues(local, sdata);
e8306f98 1541 }
f3e85b9e
VN		 1542 }
1543
2a13052f
JO		 1544 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1545 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
375177bf
VN		 1546 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1547 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1548 local->hw.conf.flags |= IEEE80211_CONF_PS;
1549 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1550 }
965bedad
JB		 1551}
1552
1553void ieee80211_dynamic_ps_timer(unsigned long data)
1554{
1555 struct ieee80211_local *local = (void *) data;
1556
78f1a8b7 1557 if (local->quiescing || local->suspended)
5bb644a0
JB		 1558 return;
1559
42935eca 1560 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 1561}
1562
164eb02d
SW		 1563void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1564{
1565 struct delayed_work *delayed_work =
1566 container_of(work, struct delayed_work, work);
1567 struct ieee80211_sub_if_data *sdata =
1568 container_of(delayed_work, struct ieee80211_sub_if_data,
1569 dfs_cac_timer_work);
d2859df5 1570 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
164eb02d 1571
34a3740d
JB		 1572 mutex_lock(&sdata->local->mtx);
1573 if (sdata->wdev.cac_started) {
1574 ieee80211_vif_release_channel(sdata);
1575 cfg80211_cac_event(sdata->dev, &chandef,
1576 NL80211_RADAR_CAC_FINISHED,
1577 GFP_KERNEL);
1578 }
1579 mutex_unlock(&sdata->local->mtx);
164eb02d
SW		 1580}
1581
60f8b39c 1582/* MLME */
7d25745d 1583static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
4ced3f74 1584 struct ieee80211_sub_if_data *sdata,
4a3cb702 1585 const u8 *wmm_param, size_t wmm_param_len)
f0706e82 1586{
f0706e82 1587 struct ieee80211_tx_queue_params params;
4ced3f74 1588 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1589 size_t left;
1590 int count;
4a3cb702
JB		 1591 const u8 *pos;
1592 u8 uapsd_queues = 0;
f0706e82 1593
e1b3ec1a 1594 if (!local->ops->conf_tx)
7d25745d 1595 return false;
e1b3ec1a 1596
32c5057b 1597 if (local->hw.queues < IEEE80211_NUM_ACS)
7d25745d 1598 return false;
3434fbd3
JB		 1599
1600 if (!wmm_param)
7d25745d 1601 return false;
3434fbd3 1602
f0706e82 1603 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
7d25745d 1604 return false;
ab13315a
KV		 1605
1606 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
dc41e4d4 1607 uapsd_queues = ifmgd->uapsd_queues;
ab13315a 1608
f0706e82 1609 count = wmm_param[6] & 0x0f;
46900298 1610 if (count == ifmgd->wmm_last_param_set)
7d25745d 1611 return false;
46900298 1612 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 1613
1614 pos = wmm_param + 8;
1615 left = wmm_param_len - 8;
1616
1617 memset(&params, 0, sizeof(params));
1618
00e96dec 1619 sdata->wmm_acm = 0;
f0706e82
JB		 1620 for (; left >= 4; left -= 4, pos += 4) {
1621 int aci = (pos[0] >> 5) & 0x03;
1622 int acm = (pos[0] >> 4) & 0x01;
ab13315a 1623 bool uapsd = false;
f0706e82
JB		 1624 int queue;
1625
1626 switch (aci) {
0eeb59fe 1627 case 1: /* AC_BK */
e100bb64 1628 queue = 3;
988c0f72 1629 if (acm)
00e96dec 1630 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV		 1631 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1632 uapsd = true;
f0706e82 1633 break;
0eeb59fe 1634 case 2: /* AC_VI */
e100bb64 1635 queue = 1;
988c0f72 1636 if (acm)
00e96dec 1637 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV		 1638 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1639 uapsd = true;
f0706e82 1640 break;
0eeb59fe 1641 case 3: /* AC_VO */
e100bb64 1642 queue = 0;
988c0f72 1643 if (acm)
00e96dec 1644 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV		 1645 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1646 uapsd = true;
f0706e82 1647 break;
0eeb59fe 1648 case 0: /* AC_BE */
f0706e82 1649 default:
e100bb64 1650 queue = 2;
988c0f72 1651 if (acm)
00e96dec 1652 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV		 1653 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1654 uapsd = true;
f0706e82
JB		 1655 break;
1656 }
1657
1658 params.aifs = pos[0] & 0x0f;
1659 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1660 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 1661 params.txop = get_unaligned_le16(pos + 2);
908f8d07 1662 params.acm = acm;
ab13315a
KV		 1663 params.uapsd = uapsd;
1664
bdcbd8e0
JB		 1665 mlme_dbg(sdata,
1666 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1667 queue, aci, acm,
1668 params.aifs, params.cw_min, params.cw_max,
1669 params.txop, params.uapsd);
f6f3def3
EP		 1670 sdata->tx_conf[queue] = params;
1671 if (drv_conf_tx(local, sdata, queue, &params))
bdcbd8e0
JB		 1672 sdata_err(sdata,
1673 "failed to set TX queue parameters for queue %d\n",
1674 queue);
f0706e82 1675 }
e1b3ec1a
SG		 1676
1677 /* enable WMM or activate new settings */
4ced3f74 1678 sdata->vif.bss_conf.qos = true;
7d25745d 1679 return true;
f0706e82
JB		 1680}
1681
925e64c3
SG		 1682static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1683{
1684 lockdep_assert_held(&sdata->local->mtx);
1685
392b9ffb 1686 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
925e64c3
SG		 1687 ieee80211_run_deferred_scan(sdata->local);
1688}
1689
1690static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1691{
1692 mutex_lock(&sdata->local->mtx);
1693 __ieee80211_stop_poll(sdata);
1694 mutex_unlock(&sdata->local->mtx);
1695}
1696
7a5158ef
JB		 1697static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1698 u16 capab, bool erp_valid, u8 erp)
5628221c 1699{
bda3933a 1700 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 1701 u32 changed = 0;
7a5158ef
JB		 1702 bool use_protection;
1703 bool use_short_preamble;
1704 bool use_short_slot;
1705
1706 if (erp_valid) {
1707 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1708 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1709 } else {
1710 use_protection = false;
1711 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1712 }
1713
1714 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
55de908a 1715 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
43d35343 1716 use_short_slot = true;
5628221c 1717
471b3efd 1718 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 1719 bss_conf->use_cts_prot = use_protection;
1720 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 1721 }
7e9ed188 1722
d43c7b37 1723 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 1724 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 1725 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 1726 }
d9430a32 1727
7a5158ef 1728 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 1729 bss_conf->use_short_slot = use_short_slot;
1730 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 1731 }
1732
1733 return changed;
1734}
1735
f698d856 1736static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 1737 struct cfg80211_bss *cbss,
ae5eb026 1738 u32 bss_info_changed)
f0706e82 1739{
0c1ad2ca 1740 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 1741 struct ieee80211_local *local = sdata->local;
68542962 1742 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
d6f2da5b 1743
ae5eb026 1744 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 1745 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
50ae34a2 1746 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 1747
7ccc8bd7 1748 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
59c1ec2b 1749 beacon_loss_count * bss_conf->beacon_int));
7ccc8bd7 1750
0c1ad2ca
JB		 1751 sdata->u.mgd.associated = cbss;
1752 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 1753
17e4ec14
JM		 1754 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1755
488dd7b5 1756 if (sdata->vif.p2p) {
9caf0364 1757 const struct cfg80211_bss_ies *ies;
488dd7b5 1758
9caf0364
JB		 1759 rcu_read_lock();
1760 ies = rcu_dereference(cbss->ies);
1761 if (ies) {
9caf0364
JB		 1762 int ret;
1763
1764 ret = cfg80211_get_p2p_attr(
1765 ies->data, ies->len,
1766 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
67baf663
JD		 1767 (u8 *) &bss_conf->p2p_noa_attr,
1768 sizeof(bss_conf->p2p_noa_attr));
9caf0364 1769 if (ret >= 2) {
67baf663
JD		 1770 sdata->u.mgd.p2p_noa_index =
1771 bss_conf->p2p_noa_attr.index;
9caf0364 1772 bss_info_changed |= BSS_CHANGED_P2P_PS;
9caf0364 1773 }
488dd7b5 1774 }
9caf0364 1775 rcu_read_unlock();
488dd7b5
JB		 1776 }
1777
b291ba11 1778 /* just to be sure */
925e64c3 1779 ieee80211_stop_poll(sdata);
b291ba11 1780
9ac19a90 1781 ieee80211_led_assoc(local, 1);
9306102e 1782
989c6505 1783 if (sdata->u.mgd.have_beacon) {
826262c3
JB		 1784 /*
1785 * If the AP is buggy we may get here with no DTIM period
1786 * known, so assume it's 1 which is the only safe assumption
1787 * in that case, although if the TIM IE is broken powersave
1788 * probably just won't work at all.
1789 */
1790 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
817cee76 1791 bss_conf->beacon_rate = bss->beacon_rate;
989c6505 1792 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
826262c3 1793 } else {
817cee76 1794 bss_conf->beacon_rate = NULL;
e5b900d2 1795 bss_conf->dtim_period = 0;
826262c3 1796 }
e5b900d2 1797
68542962 1798 bss_conf->assoc = 1;
9cef8737 1799
a97c13c3 1800 /* Tell the driver to monitor connection quality (if supported) */
ea086359 1801 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
68542962 1802 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 1803 bss_info_changed |= BSS_CHANGED_CQM;
1804
68542962 1805 /* Enable ARP filtering */
0f19b41e 1806 if (bss_conf->arp_addr_cnt)
68542962 1807 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
68542962 1808
ae5eb026 1809 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 1810
056508dc
JB		 1811 mutex_lock(&local->iflist_mtx);
1812 ieee80211_recalc_ps(local, -1);
1813 mutex_unlock(&local->iflist_mtx);
e0cb686f 1814
04ecd257 1815 ieee80211_recalc_smps(sdata);
ab095877
EP		 1816 ieee80211_recalc_ps_vif(sdata);
1817
9ac19a90 1818 netif_carrier_on(sdata->dev);
f0706e82
JB		 1819}
1820
e69e95db 1821static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
37ad3888
JB		 1822 u16 stype, u16 reason, bool tx,
1823 u8 *frame_buf)
aa458d17 1824{
46900298 1825 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17 1826 struct ieee80211_local *local = sdata->local;
3cc5240b 1827 u32 changed = 0;
aa458d17 1828
8d61ffa5 1829 sdata_assert_lock(sdata);
77fdaa12 1830
37ad3888
JB		 1831 if (WARN_ON_ONCE(tx && !frame_buf))
1832 return;
1833
b291ba11
JB		 1834 if (WARN_ON(!ifmgd->associated))
1835 return;
1836
79543d8e
DS		 1837 ieee80211_stop_poll(sdata);
1838
77fdaa12 1839 ifmgd->associated = NULL;
aa458d17
TW		 1840 netif_carrier_off(sdata->dev);
1841
88bc40e8
EP		 1842 /*
1843 * if we want to get out of ps before disassoc (why?) we have
1844 * to do it before sending disassoc, as otherwise the null-packet
1845 * won't be valid.
1846 */
1847 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1848 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1849 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1850 }
1851 local->ps_sdata = NULL;
1852
ab095877
EP		 1853 /* disable per-vif ps */
1854 ieee80211_recalc_ps_vif(sdata);
1855
f823981e
EP		 1856 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1857 if (tx)
39ecc01d 1858 ieee80211_flush_queues(local, sdata);
f823981e 1859
37ad3888
JB		 1860 /* deauthenticate/disassociate now */
1861 if (tx || frame_buf)
88a9e31c
EP		 1862 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
1863 reason, tx, frame_buf);
37ad3888
JB		 1864
1865 /* flush out frame */
1866 if (tx)
39ecc01d 1867 ieee80211_flush_queues(local, sdata);
37ad3888 1868
88a9e31c
EP		 1869 /* clear bssid only after building the needed mgmt frames */
1870 memset(ifmgd->bssid, 0, ETH_ALEN);
1871
37ad3888 1872 /* remove AP and TDLS peers */
d34ba216 1873 sta_info_flush(sdata);
37ad3888
JB		 1874
1875 /* finally reset all BSS / config parameters */
f5e5bf25
TW		 1876 changed |= ieee80211_reset_erp_info(sdata);
1877
f5e5bf25 1878 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 1879 changed |= BSS_CHANGED_ASSOC;
1880 sdata->vif.bss_conf.assoc = false;
f5e5bf25 1881
67baf663
JD		 1882 ifmgd->p2p_noa_index = -1;
1883 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
1884 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
488dd7b5 1885
dd5ecfea 1886 /* on the next assoc, re-program HT/VHT parameters */
ef96a842
BG		 1887 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1888 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
dd5ecfea
JB		 1889 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
1890 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
413ad50a 1891
1ea6f9c0 1892 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
a8302de9 1893
520eb820
KV		 1894 del_timer_sync(&local->dynamic_ps_timer);
1895 cancel_work_sync(&local->dynamic_ps_enable_work);
1896
68542962 1897 /* Disable ARP filtering */
0f19b41e 1898 if (sdata->vif.bss_conf.arp_addr_cnt)
68542962 1899 changed |= BSS_CHANGED_ARP_FILTER;
68542962 1900
3abead59
JB		 1901 sdata->vif.bss_conf.qos = false;
1902 changed |= BSS_CHANGED_QOS;
1903
0aaffa9b
JB		 1904 /* The BSSID (not really interesting) and HT changed */
1905 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 1906 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 1907
3abead59
JB		 1908 /* disassociated - set to defaults now */
1909 ieee80211_set_wmm_default(sdata, false);
1910
b9dcf712
JB		 1911 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1912 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1913 del_timer_sync(&sdata->u.mgd.timer);
1914 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2d9957cc 1915
826262c3 1916 sdata->vif.bss_conf.dtim_period = 0;
817cee76
AB		 1917 sdata->vif.bss_conf.beacon_rate = NULL;
1918
989c6505 1919 ifmgd->have_beacon = false;
826262c3 1920
028e8da0 1921 ifmgd->flags = 0;
34a3740d 1922 mutex_lock(&local->mtx);
028e8da0 1923 ieee80211_vif_release_channel(sdata);
59af6928
MK		 1924
1925 sdata->vif.csa_active = false;
a46992b4
LC		 1926 if (sdata->csa_block_tx) {
1927 ieee80211_wake_vif_queues(local, sdata,
1928 IEEE80211_QUEUE_STOP_REASON_CSA);
1929 sdata->csa_block_tx = false;
1930 }
34a3740d 1931 mutex_unlock(&local->mtx);
2475b1cc
MS		 1932
1933 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
aa458d17 1934}
f0706e82 1935
3cf335d5
KV		 1936void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1937 struct ieee80211_hdr *hdr)
1938{
1939 /*
1940 * We can postpone the mgd.timer whenever receiving unicast frames
1941 * from AP because we know that the connection is working both ways
1942 * at that time. But multicast frames (and hence also beacons) must
1943 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 1944 * data idle periods for sending the periodic probe request to the
1945 * AP we're connected to.
3cf335d5 1946 */
b291ba11
JB		 1947 if (is_multicast_ether_addr(hdr->addr1))
1948 return;
1949
be099e82 1950 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 1951}
f0706e82 1952
4e5ff376
FF		 1953static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1954{
1955 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
133d40f9 1956 struct ieee80211_local *local = sdata->local;
4e5ff376 1957
133d40f9 1958 mutex_lock(&local->mtx);
392b9ffb
SG		 1959 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
1960 goto out;
4e5ff376 1961
925e64c3 1962 __ieee80211_stop_poll(sdata);
133d40f9
SG		 1963
1964 mutex_lock(&local->iflist_mtx);
1965 ieee80211_recalc_ps(local, -1);
1966 mutex_unlock(&local->iflist_mtx);
4e5ff376
FF		 1967
1968 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
133d40f9 1969 goto out;
4e5ff376
FF		 1970
1971 /*
1972 * We've received a probe response, but are not sure whether
1973 * we have or will be receiving any beacons or data, so let's
1974 * schedule the timers again, just in case.
1975 */
1976 ieee80211_sta_reset_beacon_monitor(sdata);
1977
1978 mod_timer(&ifmgd->conn_mon_timer,
1979 round_jiffies_up(jiffies +
1980 IEEE80211_CONNECTION_IDLE_TIME));
133d40f9 1981out:
133d40f9 1982 mutex_unlock(&local->mtx);
4e5ff376
FF		 1983}
1984
1985void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
04ac3c0e 1986 struct ieee80211_hdr *hdr, bool ack)
4e5ff376 1987{
75706d0e 1988 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF		 1989 return;
1990
4e5ff376
FF		 1991 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1992 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e 1993 if (ack)
cab1c7fd 1994 ieee80211_sta_reset_conn_monitor(sdata);
04ac3c0e
FF		 1995 else
1996 sdata->u.mgd.nullfunc_failed = true;
4e5ff376 1997 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
cab1c7fd 1998 return;
4e5ff376 1999 }
cab1c7fd
WD		 2000
2001 if (ack)
2002 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF		 2003}
2004
a43abf29
ML		 2005static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2006{
2007 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2008 const u8 *ssid;
f01a067d 2009 u8 *dst = ifmgd->associated->bssid;
180205bd 2010 u8 unicast_limit = max(1, max_probe_tries - 3);
f01a067d
LR		 2011
2012 /*
2013 * Try sending broadcast probe requests for the last three
2014 * probe requests after the first ones failed since some
2015 * buggy APs only support broadcast probe requests.
2016 */
2017 if (ifmgd->probe_send_count >= unicast_limit)
2018 dst = NULL;
a43abf29 2019
4e5ff376
FF		 2020 /*
2021 * When the hardware reports an accurate Tx ACK status, it's
2022 * better to send a nullfunc frame instead of a probe request,
2023 * as it will kick us off the AP quickly if we aren't associated
2024 * anymore. The timeout will be reset if the frame is ACKed by
2025 * the AP.
2026 */
992e68bf
SD		 2027 ifmgd->probe_send_count++;
2028
04ac3c0e
FF		 2029 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2030 ifmgd->nullfunc_failed = false;
4e5ff376 2031 ieee80211_send_nullfunc(sdata->local, sdata, 0);
04ac3c0e 2032 } else {
88c868c4
SG		 2033 int ssid_len;
2034
9caf0364 2035 rcu_read_lock();
4e5ff376 2036 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
88c868c4
SG		 2037 if (WARN_ON_ONCE(ssid == NULL))
2038 ssid_len = 0;
2039 else
2040 ssid_len = ssid[1];
2041
2042 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
1672c0e3 2043 0, (u32) -1, true, 0,
55de908a 2044 ifmgd->associated->channel, false);
9caf0364 2045 rcu_read_unlock();
4e5ff376 2046 }
a43abf29 2047
180205bd 2048 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
8d61ffa5 2049 run_again(sdata, ifmgd->probe_timeout);
f69b9c79 2050 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
39ecc01d 2051 ieee80211_flush_queues(sdata->local, sdata);
a43abf29
ML		 2052}
2053
b291ba11
JB		 2054static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2055 bool beacon)
04de8381 2056{
04de8381 2057 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 2058 bool already = false;
34bfc411 2059
9607e6b6 2060 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 2061 return;
2062
8d61ffa5 2063 sdata_lock(sdata);
77fdaa12
JB		 2064
2065 if (!ifmgd->associated)
2066 goto out;
2067
133d40f9
SG		 2068 mutex_lock(&sdata->local->mtx);
2069
2070 if (sdata->local->tmp_channel || sdata->local->scanning) {
2071 mutex_unlock(&sdata->local->mtx);
2072 goto out;
2073 }
2074
a13fbe54 2075 if (beacon) {
bdcbd8e0 2076 mlme_dbg_ratelimited(sdata,
59c1ec2b
BG		 2077 "detected beacon loss from AP (missed %d beacons) - probing\n",
2078 beacon_loss_count);
bdcbd8e0 2079
a13fbe54
BG		 2080 ieee80211_cqm_rssi_notify(&sdata->vif,
2081 NL80211_CQM_RSSI_BEACON_LOSS_EVENT,
2082 GFP_KERNEL);
2083 }
04de8381 2084
b291ba11
JB		 2085 /*
2086 * The driver/our work has already reported this event or the
2087 * connection monitoring has kicked in and we have already sent
2088 * a probe request. Or maybe the AP died and the driver keeps
2089 * reporting until we disassociate...
2090 *
2091 * In either case we have to ignore the current call to this
2092 * function (except for setting the correct probe reason bit)
2093 * because otherwise we would reset the timer every time and
2094 * never check whether we received a probe response!
2095 */
392b9ffb 2096 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
b291ba11
JB		 2097 already = true;
2098
12b5f34d
EP		 2099 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2100
133d40f9
SG		 2101 mutex_unlock(&sdata->local->mtx);
2102
b291ba11
JB		 2103 if (already)
2104 goto out;
2105
4e751843
JB		 2106 mutex_lock(&sdata->local->iflist_mtx);
2107 ieee80211_recalc_ps(sdata->local, -1);
2108 mutex_unlock(&sdata->local->iflist_mtx);
2109
a43abf29
ML		 2110 ifmgd->probe_send_count = 0;
2111 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12 2112 out:
8d61ffa5 2113 sdata_unlock(sdata);
04de8381
KV		 2114}
2115
a619a4c0
JO		 2116struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2117 struct ieee80211_vif *vif)
2118{
2119 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2120 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d9b3b28b 2121 struct cfg80211_bss *cbss;
a619a4c0
JO		 2122 struct sk_buff *skb;
2123 const u8 *ssid;
88c868c4 2124 int ssid_len;
a619a4c0
JO		 2125
2126 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2127 return NULL;
2128
8d61ffa5 2129 sdata_assert_lock(sdata);
a619a4c0 2130
d9b3b28b
EP		 2131 if (ifmgd->associated)
2132 cbss = ifmgd->associated;
2133 else if (ifmgd->auth_data)
2134 cbss = ifmgd->auth_data->bss;
2135 else if (ifmgd->assoc_data)
2136 cbss = ifmgd->assoc_data->bss;
2137 else
a619a4c0
JO		 2138 return NULL;
2139
9caf0364 2140 rcu_read_lock();
d9b3b28b 2141 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
88c868c4
SG		 2142 if (WARN_ON_ONCE(ssid == NULL))
2143 ssid_len = 0;
2144 else
2145 ssid_len = ssid[1];
2146
d9b3b28b 2147 skb = ieee80211_build_probe_req(sdata, cbss->bssid,
55de908a 2148 (u32) -1, cbss->channel,
6b77863b 2149 ssid + 2, ssid_len,
85a237fe 2150 NULL, 0, true);
9caf0364 2151 rcu_read_unlock();
a619a4c0
JO		 2152
2153 return skb;
2154}
2155EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2156
eef9e54c 2157static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
1e4dcd01 2158{
59af6928 2159 struct ieee80211_local *local = sdata->local;
1e4dcd01 2160 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 2161 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
1e4dcd01 2162
8d61ffa5 2163 sdata_lock(sdata);
1e4dcd01 2164 if (!ifmgd->associated) {
8d61ffa5 2165 sdata_unlock(sdata);
1e4dcd01
JO		 2166 return;
2167 }
2168
37ad3888
JB		 2169 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2170 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
eef9e54c 2171 true, frame_buf);
59af6928 2172 mutex_lock(&local->mtx);
7578d575 2173 sdata->vif.csa_active = false;
a46992b4
LC		 2174 if (sdata->csa_block_tx) {
2175 ieee80211_wake_vif_queues(local, sdata,
2176 IEEE80211_QUEUE_STOP_REASON_CSA);
2177 sdata->csa_block_tx = false;
2178 }
59af6928 2179 mutex_unlock(&local->mtx);
7da7cc1d 2180
6ff57cf8
JB		 2181 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
2182 IEEE80211_DEAUTH_FRAME_LEN);
8d61ffa5 2183 sdata_unlock(sdata);
1e4dcd01
JO		 2184}
2185
cc74c0c7 2186static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 2187{
2188 struct ieee80211_sub_if_data *sdata =
2189 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 2190 u.mgd.beacon_connection_loss_work);
a85e1d55
PS		 2191 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2192 struct sta_info *sta;
2193
2194 if (ifmgd->associated) {
30fa9047 2195 rcu_read_lock();
a85e1d55
PS		 2196 sta = sta_info_get(sdata, ifmgd->bssid);
2197 if (sta)
2198 sta->beacon_loss_count++;
30fa9047 2199 rcu_read_unlock();
a85e1d55 2200 }
b291ba11 2201
682bd38b 2202 if (ifmgd->connection_loss) {
882a7c69
JB		 2203 sdata_info(sdata, "Connection to AP %pM lost\n",
2204 ifmgd->bssid);
eef9e54c 2205 __ieee80211_disconnect(sdata);
882a7c69 2206 } else {
1e4dcd01 2207 ieee80211_mgd_probe_ap(sdata, true);
882a7c69
JB		 2208 }
2209}
2210
2211static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2212{
2213 struct ieee80211_sub_if_data *sdata =
2214 container_of(work, struct ieee80211_sub_if_data,
2215 u.mgd.csa_connection_drop_work);
2216
eef9e54c 2217 __ieee80211_disconnect(sdata);
b291ba11
JB		 2218}
2219
04de8381
KV		 2220void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2221{
2222 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 2223 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 2224
b5878a2d
JB		 2225 trace_api_beacon_loss(sdata);
2226
682bd38b 2227 sdata->u.mgd.connection_loss = false;
1e4dcd01 2228 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 2229}
2230EXPORT_SYMBOL(ieee80211_beacon_loss);
2231
1e4dcd01
JO		 2232void ieee80211_connection_loss(struct ieee80211_vif *vif)
2233{
2234 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2235 struct ieee80211_hw *hw = &sdata->local->hw;
2236
b5878a2d
JB		 2237 trace_api_connection_loss(sdata);
2238
682bd38b 2239 sdata->u.mgd.connection_loss = true;
1e4dcd01
JO		 2240 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2241}
2242EXPORT_SYMBOL(ieee80211_connection_loss);
2243
2244
66e67e41
JB		 2245static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2246 bool assoc)
2247{
2248 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2249
8d61ffa5 2250 sdata_assert_lock(sdata);
66e67e41 2251
66e67e41
JB		 2252 if (!assoc) {
2253 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2254
2255 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2256 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
028e8da0 2257 sdata->u.mgd.flags = 0;
34a3740d 2258 mutex_lock(&sdata->local->mtx);
55de908a 2259 ieee80211_vif_release_channel(sdata);
34a3740d 2260 mutex_unlock(&sdata->local->mtx);
66e67e41
JB		 2261 }
2262
5b112d3d 2263 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
66e67e41
JB		 2264 kfree(auth_data);
2265 sdata->u.mgd.auth_data = NULL;
2266}
2267
2268static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2269 struct ieee80211_mgmt *mgmt, size_t len)
2270{
1672c0e3 2271 struct ieee80211_local *local = sdata->local;
66e67e41
JB		 2272 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2273 u8 *pos;
2274 struct ieee802_11_elems elems;
1672c0e3 2275 u32 tx_flags = 0;
66e67e41
JB		 2276
2277 pos = mgmt->u.auth.variable;
b2e506bf 2278 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
66e67e41
JB		 2279 if (!elems.challenge)
2280 return;
2281 auth_data->expected_transaction = 4;
a1845fc7 2282 drv_mgd_prepare_tx(sdata->local, sdata);
1672c0e3
JB		 2283 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2284 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2285 IEEE80211_TX_INTFL_MLME_CONN_TX;
700e8ea6 2286 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
66e67e41
JB		 2287 elems.challenge - 2, elems.challenge_len + 2,
2288 auth_data->bss->bssid, auth_data->bss->bssid,
2289 auth_data->key, auth_data->key_len,
1672c0e3 2290 auth_data->key_idx, tx_flags);
66e67e41
JB		 2291}
2292
8d61ffa5
JB		 2293static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2294 struct ieee80211_mgmt *mgmt, size_t len)
66e67e41
JB		 2295{
2296 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2297 u8 bssid[ETH_ALEN];
2298 u16 auth_alg, auth_transaction, status_code;
2299 struct sta_info *sta;
2300
8d61ffa5 2301 sdata_assert_lock(sdata);
66e67e41
JB		 2302
2303 if (len < 24 + 6)
8d61ffa5 2304 return;
66e67e41
JB		 2305
2306 if (!ifmgd->auth_data || ifmgd->auth_data->done)
8d61ffa5 2307 return;
66e67e41
JB		 2308
2309 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2310
b203ca39 2311 if (!ether_addr_equal(bssid, mgmt->bssid))
8d61ffa5 2312 return;
66e67e41
JB		 2313
2314 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2315 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2316 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2317
2318 if (auth_alg != ifmgd->auth_data->algorithm ||
0f4126e8
JM		 2319 auth_transaction != ifmgd->auth_data->expected_transaction) {
2320 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2321 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2322 auth_transaction,
2323 ifmgd->auth_data->expected_transaction);
8d61ffa5 2324 return;
0f4126e8 2325 }
66e67e41
JB		 2326
2327 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2328 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2329 mgmt->sa, status_code);
dac211ec 2330 ieee80211_destroy_auth_data(sdata, false);
6ff57cf8 2331 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
8d61ffa5 2332 return;
66e67e41
JB		 2333 }
2334
2335 switch (ifmgd->auth_data->algorithm) {
2336 case WLAN_AUTH_OPEN:
2337 case WLAN_AUTH_LEAP:
2338 case WLAN_AUTH_FT:
6b8ece3a 2339 case WLAN_AUTH_SAE:
66e67e41
JB		 2340 break;
2341 case WLAN_AUTH_SHARED_KEY:
2342 if (ifmgd->auth_data->expected_transaction != 4) {
2343 ieee80211_auth_challenge(sdata, mgmt, len);
2344 /* need another frame */
8d61ffa5 2345 return;
66e67e41
JB		 2346 }
2347 break;
2348 default:
2349 WARN_ONCE(1, "invalid auth alg %d",
2350 ifmgd->auth_data->algorithm);
8d61ffa5 2351 return;
66e67e41
JB		 2352 }
2353
bdcbd8e0 2354 sdata_info(sdata, "authenticated\n");
66e67e41
JB		 2355 ifmgd->auth_data->done = true;
2356 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
89afe614 2357 ifmgd->auth_data->timeout_started = true;
8d61ffa5 2358 run_again(sdata, ifmgd->auth_data->timeout);
66e67e41 2359
6b8ece3a
JM		 2360 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2361 ifmgd->auth_data->expected_transaction != 2) {
2362 /*
2363 * Report auth frame to user space for processing since another
2364 * round of Authentication frames is still needed.
2365 */
6ff57cf8 2366 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
8d61ffa5 2367 return;
6b8ece3a
JM		 2368 }
2369
66e67e41
JB		 2370 /* move station state to auth */
2371 mutex_lock(&sdata->local->sta_mtx);
2372 sta = sta_info_get(sdata, bssid);
2373 if (!sta) {
2374 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2375 goto out_err;
2376 }
2377 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
bdcbd8e0 2378 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
66e67e41
JB		 2379 goto out_err;
2380 }
2381 mutex_unlock(&sdata->local->sta_mtx);
2382
6ff57cf8 2383 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
8d61ffa5 2384 return;
66e67e41
JB		 2385 out_err:
2386 mutex_unlock(&sdata->local->sta_mtx);
2387 /* ignore frame -- wait for timeout */
66e67e41
JB		 2388}
2389
dfa1ad29
CO		 2390#define case_WLAN(type) \
2391 case WLAN_REASON_##type: return #type
2392
2393static const char *ieee80211_get_reason_code_string(u16 reason_code)
2394{
2395 switch (reason_code) {
2396 case_WLAN(UNSPECIFIED);
2397 case_WLAN(PREV_AUTH_NOT_VALID);
2398 case_WLAN(DEAUTH_LEAVING);
2399 case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2400 case_WLAN(DISASSOC_AP_BUSY);
2401 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2402 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2403 case_WLAN(DISASSOC_STA_HAS_LEFT);
2404 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2405 case_WLAN(DISASSOC_BAD_POWER);
2406 case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2407 case_WLAN(INVALID_IE);
2408 case_WLAN(MIC_FAILURE);
2409 case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2410 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2411 case_WLAN(IE_DIFFERENT);
2412 case_WLAN(INVALID_GROUP_CIPHER);
2413 case_WLAN(INVALID_PAIRWISE_CIPHER);
2414 case_WLAN(INVALID_AKMP);
2415 case_WLAN(UNSUPP_RSN_VERSION);
2416 case_WLAN(INVALID_RSN_IE_CAP);
2417 case_WLAN(IEEE8021X_FAILED);
2418 case_WLAN(CIPHER_SUITE_REJECTED);
2419 case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2420 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2421 case_WLAN(DISASSOC_LOW_ACK);
2422 case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2423 case_WLAN(QSTA_LEAVE_QBSS);
2424 case_WLAN(QSTA_NOT_USE);
2425 case_WLAN(QSTA_REQUIRE_SETUP);
2426 case_WLAN(QSTA_TIMEOUT);
2427 case_WLAN(QSTA_CIPHER_NOT_SUPP);
2428 case_WLAN(MESH_PEER_CANCELED);
2429 case_WLAN(MESH_MAX_PEERS);
2430 case_WLAN(MESH_CONFIG);
2431 case_WLAN(MESH_CLOSE);
2432 case_WLAN(MESH_MAX_RETRIES);
2433 case_WLAN(MESH_CONFIRM_TIMEOUT);
2434 case_WLAN(MESH_INVALID_GTK);
2435 case_WLAN(MESH_INCONSISTENT_PARAM);
2436 case_WLAN(MESH_INVALID_SECURITY);
2437 case_WLAN(MESH_PATH_ERROR);
2438 case_WLAN(MESH_PATH_NOFORWARD);
2439 case_WLAN(MESH_PATH_DEST_UNREACHABLE);
2440 case_WLAN(MAC_EXISTS_IN_MBSS);
2441 case_WLAN(MESH_CHAN_REGULATORY);
2442 case_WLAN(MESH_CHAN);
2443 default: return "<unknown>";
2444 }
2445}
66e67e41 2446
8d61ffa5
JB		 2447static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2448 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2449{
46900298 2450 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 2451 const u8 *bssid = NULL;
f0706e82
JB		 2452 u16 reason_code;
2453
8d61ffa5 2454 sdata_assert_lock(sdata);
66e67e41 2455
f4ea83dd 2456 if (len < 24 + 2)
8d61ffa5 2457 return;
f0706e82 2458
66e67e41 2459 if (!ifmgd->associated ||
b203ca39 2460 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
8d61ffa5 2461 return;
77fdaa12 2462
0c1ad2ca 2463 bssid = ifmgd->associated->bssid;
f0706e82
JB		 2464
2465 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2466
dfa1ad29
CO		 2467 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
2468 bssid, reason_code, ieee80211_get_reason_code_string(reason_code));
77fdaa12 2469
37ad3888
JB		 2470 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2471
6ff57cf8 2472 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
f0706e82
JB		 2473}
2474
2475
8d61ffa5
JB		 2476static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2477 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2478{
46900298 2479 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 2480 u16 reason_code;
2481
8d61ffa5 2482 sdata_assert_lock(sdata);
77fdaa12 2483
66e67e41 2484 if (len < 24 + 2)
8d61ffa5 2485 return;
77fdaa12 2486
66e67e41 2487 if (!ifmgd->associated ||
b203ca39 2488 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
8d61ffa5 2489 return;
f0706e82
JB		 2490
2491 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2492
bdcbd8e0
JB		 2493 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2494 mgmt->sa, reason_code);
f0706e82 2495
37ad3888
JB		 2496 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2497
6ff57cf8 2498 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
f0706e82
JB		 2499}
2500
c74d084f
CL		 2501static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2502 u8 *supp_rates, unsigned int supp_rates_len,
2503 u32 *rates, u32 *basic_rates,
2504 bool *have_higher_than_11mbit,
2103dec1
SW		 2505 int *min_rate, int *min_rate_index,
2506 int shift, u32 rate_flags)
c74d084f
CL		 2507{
2508 int i, j;
2509
2510 for (i = 0; i < supp_rates_len; i++) {
2103dec1 2511 int rate = supp_rates[i] & 0x7f;
c74d084f
CL		 2512 bool is_basic = !!(supp_rates[i] & 0x80);
2513
2103dec1 2514 if ((rate * 5 * (1 << shift)) > 110)
c74d084f
CL		 2515 *have_higher_than_11mbit = true;
2516
2517 /*
2518 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2519 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2520 *
2521 * Note: Even through the membership selector and the basic
2522 * rate flag share the same bit, they are not exactly
2523 * the same.
2524 */
2525 if (!!(supp_rates[i] & 0x80) &&
2526 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2527 continue;
2528
2529 for (j = 0; j < sband->n_bitrates; j++) {
2103dec1
SW		 2530 struct ieee80211_rate *br;
2531 int brate;
2532
2533 br = &sband->bitrates[j];
2534 if ((rate_flags & br->flags) != rate_flags)
2535 continue;
2536
2537 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2538 if (brate == rate) {
c74d084f
CL		 2539 *rates |= BIT(j);
2540 if (is_basic)
2541 *basic_rates |= BIT(j);
2103dec1
SW		 2542 if ((rate * 5) < *min_rate) {
2543 *min_rate = rate * 5;
c74d084f
CL		 2544 *min_rate_index = j;
2545 }
2546 break;
2547 }
2548 }
2549 }
2550}
f0706e82 2551
66e67e41
JB		 2552static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2553 bool assoc)
2554{
2555 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2556
8d61ffa5 2557 sdata_assert_lock(sdata);
66e67e41 2558
66e67e41
JB		 2559 if (!assoc) {
2560 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2561
2562 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2563 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
028e8da0 2564 sdata->u.mgd.flags = 0;
34a3740d 2565 mutex_lock(&sdata->local->mtx);
55de908a 2566 ieee80211_vif_release_channel(sdata);
34a3740d 2567 mutex_unlock(&sdata->local->mtx);
66e67e41
JB		 2568 }
2569
2570 kfree(assoc_data);
2571 sdata->u.mgd.assoc_data = NULL;
2572}
2573
2574static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2575 struct cfg80211_bss *cbss,
af6b6374 2576 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2577{
46900298 2578 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 2579 struct ieee80211_local *local = sdata->local;
8318d78a 2580 struct ieee80211_supported_band *sband;
f0706e82 2581 struct sta_info *sta;
af6b6374 2582 u8 *pos;
af6b6374 2583 u16 capab_info, aid;
f0706e82 2584 struct ieee802_11_elems elems;
bda3933a 2585 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
35d865af
JB		 2586 const struct cfg80211_bss_ies *bss_ies = NULL;
2587 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
ae5eb026 2588 u32 changed = 0;
c74d084f 2589 int err;
35d865af 2590 bool ret;
f0706e82 2591
af6b6374 2592 /* AssocResp and ReassocResp have identical structure */
f0706e82 2593
f0706e82 2594 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 2595 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 2596
1dd84aa2 2597 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
bdcbd8e0
JB		 2598 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2599 aid);
1dd84aa2
JB		 2600 aid &= ~(BIT(15) | BIT(14));
2601
05cb9108
JB		 2602 ifmgd->broken_ap = false;
2603
2604 if (aid == 0 || aid > IEEE80211_MAX_AID) {
bdcbd8e0
JB		 2605 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2606 aid);
05cb9108
JB		 2607 aid = 0;
2608 ifmgd->broken_ap = true;
2609 }
2610
af6b6374 2611 pos = mgmt->u.assoc_resp.variable;
b2e506bf 2612 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
af6b6374 2613
f0706e82 2614 if (!elems.supp_rates) {
bdcbd8e0 2615 sdata_info(sdata, "no SuppRates element in AssocResp\n");
af6b6374 2616 return false;
f0706e82
JB		 2617 }
2618
46900298 2619 ifmgd->aid = aid;
f0706e82 2620
35d865af
JB		 2621 /*
2622 * Some APs are erroneously not including some information in their
2623 * (re)association response frames. Try to recover by using the data
2624 * from the beacon or probe response. This seems to afflict mobile
2625 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2626 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2627 */
2628 if ((assoc_data->wmm && !elems.wmm_param) ||
2629 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2630 (!elems.ht_cap_elem || !elems.ht_operation)) ||
2631 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2632 (!elems.vht_cap_elem || !elems.vht_operation))) {
2633 const struct cfg80211_bss_ies *ies;
2634 struct ieee802_11_elems bss_elems;
2635
2636 rcu_read_lock();
2637 ies = rcu_dereference(cbss->ies);
2638 if (ies)
2639 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2640 GFP_ATOMIC);
2641 rcu_read_unlock();
2642 if (!bss_ies)
2643 return false;
2644
2645 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2646 false, &bss_elems);
2647 if (assoc_data->wmm &&
2648 !elems.wmm_param && bss_elems.wmm_param) {
2649 elems.wmm_param = bss_elems.wmm_param;
2650 sdata_info(sdata,
2651 "AP bug: WMM param missing from AssocResp\n");
2652 }
2653
2654 /*
2655 * Also check if we requested HT/VHT, otherwise the AP doesn't
2656 * have to include the IEs in the (re)association response.
2657 */
2658 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2659 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2660 elems.ht_cap_elem = bss_elems.ht_cap_elem;
2661 sdata_info(sdata,
2662 "AP bug: HT capability missing from AssocResp\n");
2663 }
2664 if (!elems.ht_operation && bss_elems.ht_operation &&
2665 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2666 elems.ht_operation = bss_elems.ht_operation;
2667 sdata_info(sdata,
2668 "AP bug: HT operation missing from AssocResp\n");
2669 }
2670 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2671 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2672 elems.vht_cap_elem = bss_elems.vht_cap_elem;
2673 sdata_info(sdata,
2674 "AP bug: VHT capa missing from AssocResp\n");
2675 }
2676 if (!elems.vht_operation && bss_elems.vht_operation &&
2677 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2678 elems.vht_operation = bss_elems.vht_operation;
2679 sdata_info(sdata,
2680 "AP bug: VHT operation missing from AssocResp\n");
2681 }
2682 }
2683
30eb1dc2
JB		 2684 /*
2685 * We previously checked these in the beacon/probe response, so
2686 * they should be present here. This is just a safety net.
2687 */
2688 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2689 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2690 sdata_info(sdata,
35d865af
JB		 2691 "HT AP is missing WMM params or HT capability/operation\n");
2692 ret = false;
2693 goto out;
30eb1dc2
JB		 2694 }
2695
2696 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2697 (!elems.vht_cap_elem || !elems.vht_operation)) {
2698 sdata_info(sdata,
35d865af
JB		 2699 "VHT AP is missing VHT capability/operation\n");
2700 ret = false;
2701 goto out;
30eb1dc2
JB		 2702 }
2703
2a33bee2
GE		 2704 mutex_lock(&sdata->local->sta_mtx);
2705 /*
2706 * station info was already allocated and inserted before
2707 * the association and should be available to us
2708 */
7852e361 2709 sta = sta_info_get(sdata, cbss->bssid);
2a33bee2
GE		 2710 if (WARN_ON(!sta)) {
2711 mutex_unlock(&sdata->local->sta_mtx);
35d865af
JB		 2712 ret = false;
2713 goto out;
77fdaa12 2714 }
05e5e883 2715
55de908a 2716 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
f709fc69 2717
30eb1dc2 2718 /* Set up internal HT/VHT capabilities */
a8243b72 2719 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
ef96a842 2720 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
e1a0c6b3 2721 elems.ht_cap_elem, sta);
64f68e5d 2722
818255ea
MP		 2723 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2724 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
4a34215e 2725 elems.vht_cap_elem, sta);
818255ea 2726
30eb1dc2
JB		 2727 /*
2728 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
2729 * in their association response, so ignore that data for our own
2730 * configuration. If it changed since the last beacon, we'll get the
2731 * next beacon and update then.
2732 */
1128958d 2733
bee7f586
JB		 2734 /*
2735 * If an operating mode notification IE is present, override the
2736 * NSS calculation (that would be done in rate_control_rate_init())
2737 * and use the # of streams from that element.
2738 */
2739 if (elems.opmode_notif &&
2740 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
2741 u8 nss;
2742
2743 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
2744 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
2745 nss += 1;
2746 sta->sta.rx_nss = nss;
2747 }
2748
4b7679a5 2749 rate_control_rate_init(sta);
f0706e82 2750
46900298 2751 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
c2c98fde 2752 set_sta_flag(sta, WLAN_STA_MFP);
5394af4d 2753
a74a8c84 2754 sta->sta.wme = elems.wmm_param;
ddf4ac53 2755
3e4d40fa 2756 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
c8987876
JB		 2757 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2758 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2759 if (err) {
bdcbd8e0
JB		 2760 sdata_info(sdata,
2761 "failed to move station %pM to desired state\n",
2762 sta->sta.addr);
c8987876
JB		 2763 WARN_ON(__sta_info_destroy(sta));
2764 mutex_unlock(&sdata->local->sta_mtx);
35d865af
JB		 2765 ret = false;
2766 goto out;
c8987876
JB		 2767 }
2768
7852e361 2769 mutex_unlock(&sdata->local->sta_mtx);
ddf4ac53 2770
f2176d72
JO		 2771 /*
2772 * Always handle WMM once after association regardless
2773 * of the first value the AP uses. Setting -1 here has
2774 * that effect because the AP values is an unsigned
2775 * 4-bit value.
2776 */
2777 ifmgd->wmm_last_param_set = -1;
2778
095d81ce 2779 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && elems.wmm_param)
4ced3f74 2780 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 2781 elems.wmm_param_len);
aa837e1d 2782 else
3abead59
JB		 2783 ieee80211_set_wmm_default(sdata, false);
2784 changed |= BSS_CHANGED_QOS;
f0706e82 2785
60f8b39c
JB		 2786 /* set AID and assoc capability,
2787 * ieee80211_set_associated() will tell the driver */
2788 bss_conf->aid = aid;
2789 bss_conf->assoc_capability = capab_info;
0c1ad2ca 2790 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 2791
d524215f
FF		 2792 /*
2793 * If we're using 4-addr mode, let the AP know that we're
2794 * doing so, so that it can create the STA VLAN on its side
2795 */
2796 if (ifmgd->use_4addr)
2797 ieee80211_send_4addr_nullfunc(local, sdata);
2798
15b7b062 2799 /*
b291ba11
JB		 2800 * Start timer to probe the connection to the AP now.
2801 * Also start the timer that will detect beacon loss.
15b7b062 2802 */
b291ba11 2803 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 2804 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 2805
35d865af
JB		 2806 ret = true;
2807 out:
2808 kfree(bss_ies);
2809 return ret;
f0706e82
JB		 2810}
2811
8d61ffa5
JB		 2812static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2813 struct ieee80211_mgmt *mgmt,
2814 size_t len)
66e67e41
JB		 2815{
2816 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2817 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2818 u16 capab_info, status_code, aid;
2819 struct ieee802_11_elems elems;
b0b6aa2c 2820 int ac, uapsd_queues = -1;
66e67e41
JB		 2821 u8 *pos;
2822 bool reassoc;
8d61ffa5 2823 struct cfg80211_bss *bss;
66e67e41 2824
8d61ffa5 2825 sdata_assert_lock(sdata);
66e67e41
JB		 2826
2827 if (!assoc_data)
8d61ffa5 2828 return;
b203ca39 2829 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
8d61ffa5 2830 return;
66e67e41
JB		 2831
2832 /*
2833 * AssocResp and ReassocResp have identical structure, so process both
2834 * of them in this function.
2835 */
2836
2837 if (len < 24 + 6)
8d61ffa5 2838 return;
66e67e41
JB		 2839
2840 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2841 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2842 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2843 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2844
bdcbd8e0
JB		 2845 sdata_info(sdata,
2846 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2847 reassoc ? "Rea" : "A", mgmt->sa,
2848 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
66e67e41
JB		 2849
2850 pos = mgmt->u.assoc_resp.variable;
b2e506bf 2851 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
66e67e41
JB		 2852
2853 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
79ba1d89
JB		 2854 elems.timeout_int &&
2855 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
66e67e41 2856 u32 tu, ms;
79ba1d89 2857 tu = le32_to_cpu(elems.timeout_int->value);
66e67e41 2858 ms = tu * 1024 / 1000;
bdcbd8e0
JB		 2859 sdata_info(sdata,
2860 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2861 mgmt->sa, tu, ms);
66e67e41 2862 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
89afe614 2863 assoc_data->timeout_started = true;
66e67e41 2864 if (ms > IEEE80211_ASSOC_TIMEOUT)
8d61ffa5
JB		 2865 run_again(sdata, assoc_data->timeout);
2866 return;
66e67e41
JB		 2867 }
2868
8d61ffa5 2869 bss = assoc_data->bss;
66e67e41
JB		 2870
2871 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2872 sdata_info(sdata, "%pM denied association (code=%d)\n",
2873 mgmt->sa, status_code);
66e67e41
JB		 2874 ieee80211_destroy_assoc_data(sdata, false);
2875 } else {
8d61ffa5 2876 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
66e67e41 2877 /* oops -- internal error -- send timeout for now */
10a9109f 2878 ieee80211_destroy_assoc_data(sdata, false);
959867fa 2879 cfg80211_assoc_timeout(sdata->dev, bss);
8d61ffa5 2880 return;
66e67e41 2881 }
635d999f 2882 sdata_info(sdata, "associated\n");
79ebfb85
JB		 2883
2884 /*
2885 * destroy assoc_data afterwards, as otherwise an idle
2886 * recalc after assoc_data is NULL but before associated
2887 * is set can cause the interface to go idle
2888 */
2889 ieee80211_destroy_assoc_data(sdata, true);
b0b6aa2c
EP		 2890
2891 /* get uapsd queues configuration */
2892 uapsd_queues = 0;
2893 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
2894 if (sdata->tx_conf[ac].uapsd)
2895 uapsd_queues |= BIT(ac);
66e67e41
JB		 2896 }
2897
b0b6aa2c 2898 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues);
66e67e41 2899}
8e3c1b77 2900
98c8fccf 2901static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
8e3c1b77 2902 struct ieee80211_mgmt *mgmt, size_t len,
98c8fccf 2903 struct ieee80211_rx_status *rx_status,
d45c4172 2904 struct ieee802_11_elems *elems)
98c8fccf
JB		 2905{
2906 struct ieee80211_local *local = sdata->local;
c2b13452 2907 struct ieee80211_bss *bss;
98c8fccf 2908 struct ieee80211_channel *channel;
56007a02 2909
8d61ffa5 2910 sdata_assert_lock(sdata);
b4f286a1 2911
3afc2167
EG		 2912 channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
2913 if (!channel)
98c8fccf
JB		 2914 return;
2915
98c8fccf 2916 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
d45c4172 2917 channel);
817cee76 2918 if (bss) {
817cee76 2919 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
d2722f8b 2920 ieee80211_rx_bss_put(local, bss);
817cee76 2921 }
f0706e82
JB		 2922}
2923
2924
f698d856 2925static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 2926 struct sk_buff *skb)
f0706e82 2927{
af6b6374 2928 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 2929 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 2930 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2931 size_t baselen, len = skb->len;
ae6a44e3
EK		 2932 struct ieee802_11_elems elems;
2933
15b7b062
KV		 2934 ifmgd = &sdata->u.mgd;
2935
8d61ffa5 2936 sdata_assert_lock(sdata);
77fdaa12 2937
b203ca39 2938 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
8e7cdbb6
TW		 2939 return; /* ignore ProbeResp to foreign address */
2940
ae6a44e3
EK		 2941 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2942 if (baselen > len)
2943 return;
2944
2945 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
b2e506bf 2946 false, &elems);
ae6a44e3 2947
d45c4172 2948 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
9859b81e 2949
77fdaa12 2950 if (ifmgd->associated &&
b203ca39 2951 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
4e5ff376 2952 ieee80211_reset_ap_probe(sdata);
66e67e41
JB		 2953
2954 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
b203ca39 2955 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
66e67e41 2956 /* got probe response, continue with auth */
bdcbd8e0 2957 sdata_info(sdata, "direct probe responded\n");
66e67e41
JB		 2958 ifmgd->auth_data->tries = 0;
2959 ifmgd->auth_data->timeout = jiffies;
89afe614 2960 ifmgd->auth_data->timeout_started = true;
8d61ffa5 2961 run_again(sdata, ifmgd->auth_data->timeout);
66e67e41 2962 }
f0706e82
JB		 2963}
2964
d91f36db
JB		 2965/*
2966 * This is the canonical list of information elements we care about,
2967 * the filter code also gives us all changes to the Microsoft OUI
c8d65917
SG		 2968 * (00:50:F2) vendor IE which is used for WMM which we need to track,
2969 * as well as the DTPC IE (part of the Cisco OUI) used for signaling
2970 * changes to requested client power.
d91f36db
JB		 2971 *
2972 * We implement beacon filtering in software since that means we can
2973 * avoid processing the frame here and in cfg80211, and userspace
2974 * will not be able to tell whether the hardware supports it or not.
2975 *
2976 * XXX: This list needs to be dynamic -- userspace needs to be able to
2977 * add items it requires. It also needs to be able to tell us to
2978 * look out for other vendor IEs.
2979 */
2980static const u64 care_about_ies =
1d4df3a5
JB		 2981 (1ULL << WLAN_EID_COUNTRY) |
2982 (1ULL << WLAN_EID_ERP_INFO) |
2983 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2984 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2985 (1ULL << WLAN_EID_HT_CAPABILITY) |
074d46d1 2986 (1ULL << WLAN_EID_HT_OPERATION);
d91f36db 2987
8d61ffa5
JB		 2988static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
2989 struct ieee80211_mgmt *mgmt, size_t len,
2990 struct ieee80211_rx_status *rx_status)
f0706e82 2991{
d91f36db 2992 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 2993 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 2994 size_t baselen;
2995 struct ieee802_11_elems elems;
f698d856 2996 struct ieee80211_local *local = sdata->local;
55de908a
JB		 2997 struct ieee80211_chanctx_conf *chanctx_conf;
2998 struct ieee80211_channel *chan;
bee7f586 2999 struct sta_info *sta;
471b3efd 3000 u32 changed = 0;
f87ad637 3001 bool erp_valid;
7a5158ef 3002 u8 erp_value = 0;
d91f36db 3003 u32 ncrc;
77fdaa12 3004 u8 *bssid;
8d61ffa5 3005 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
77fdaa12 3006
8d61ffa5 3007 sdata_assert_lock(sdata);
f0706e82 3008
ae6a44e3
EK		 3009 /* Process beacon from the current BSS */
3010 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3011 if (baselen > len)
8d61ffa5 3012 return;
ae6a44e3 3013
55de908a
JB		 3014 rcu_read_lock();
3015 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3016 if (!chanctx_conf) {
3017 rcu_read_unlock();
8d61ffa5 3018 return;
55de908a
JB		 3019 }
3020
4bf88530 3021 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
55de908a 3022 rcu_read_unlock();
8d61ffa5 3023 return;
55de908a 3024 }
4bf88530 3025 chan = chanctx_conf->def.chan;
55de908a 3026 rcu_read_unlock();
f0706e82 3027
c65dd147 3028 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
b203ca39 3029 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
66e67e41 3030 ieee802_11_parse_elems(mgmt->u.beacon.variable,
b2e506bf 3031 len - baselen, false, &elems);
77fdaa12 3032
d45c4172 3033 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
482a9c74
AB		 3034 if (elems.tim && !elems.parse_error) {
3035 const struct ieee80211_tim_ie *tim_ie = elems.tim;
3036 ifmgd->dtim_period = tim_ie->dtim_period;
3037 }
989c6505 3038 ifmgd->have_beacon = true;
c65dd147 3039 ifmgd->assoc_data->need_beacon = false;
ef429dad
JB		 3040 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3041 sdata->vif.bss_conf.sync_tsf =
3042 le64_to_cpu(mgmt->u.beacon.timestamp);
3043 sdata->vif.bss_conf.sync_device_ts =
3044 rx_status->device_timestamp;
3045 if (elems.tim)
3046 sdata->vif.bss_conf.sync_dtim_count =
3047 elems.tim->dtim_count;
3048 else
3049 sdata->vif.bss_conf.sync_dtim_count = 0;
3050 }
66e67e41
JB		 3051 /* continue assoc process */
3052 ifmgd->assoc_data->timeout = jiffies;
89afe614 3053 ifmgd->assoc_data->timeout_started = true;
8d61ffa5
JB		 3054 run_again(sdata, ifmgd->assoc_data->timeout);
3055 return;
66e67e41 3056 }
77fdaa12 3057
66e67e41 3058 if (!ifmgd->associated ||
b203ca39 3059 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
8d61ffa5 3060 return;
66e67e41 3061 bssid = ifmgd->associated->bssid;
f0706e82 3062
17e4ec14
JM		 3063 /* Track average RSSI from the Beacon frames of the current AP */
3064 ifmgd->last_beacon_signal = rx_status->signal;
3065 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3066 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3ba06c6f 3067 ifmgd->ave_beacon_signal = rx_status->signal * 16;
17e4ec14 3068 ifmgd->last_cqm_event_signal = 0;
391a200a 3069 ifmgd->count_beacon_signal = 1;
615f7b9b 3070 ifmgd->last_ave_beacon_signal = 0;
17e4ec14
JM		 3071 } else {
3072 ifmgd->ave_beacon_signal =
3073 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
3074 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
3075 ifmgd->ave_beacon_signal) / 16;
391a200a 3076 ifmgd->count_beacon_signal++;
17e4ec14 3077 }
615f7b9b
MV		 3078
3079 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3080 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3081 int sig = ifmgd->ave_beacon_signal;
3082 int last_sig = ifmgd->last_ave_beacon_signal;
3083
3084 /*
3085 * if signal crosses either of the boundaries, invoke callback
3086 * with appropriate parameters
3087 */
3088 if (sig > ifmgd->rssi_max_thold &&
3089 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3090 ifmgd->last_ave_beacon_signal = sig;
887da917 3091 drv_rssi_callback(local, sdata, RSSI_EVENT_HIGH);
615f7b9b
MV		 3092 } else if (sig < ifmgd->rssi_min_thold &&
3093 (last_sig >= ifmgd->rssi_max_thold ||
3094 last_sig == 0)) {
3095 ifmgd->last_ave_beacon_signal = sig;
887da917 3096 drv_rssi_callback(local, sdata, RSSI_EVENT_LOW);
615f7b9b
MV		 3097 }
3098 }
3099
17e4ec14 3100 if (bss_conf->cqm_rssi_thold &&
391a200a 3101 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
ea086359 3102 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
17e4ec14
JM		 3103 int sig = ifmgd->ave_beacon_signal / 16;
3104 int last_event = ifmgd->last_cqm_event_signal;
3105 int thold = bss_conf->cqm_rssi_thold;
3106 int hyst = bss_conf->cqm_rssi_hyst;
3107 if (sig < thold &&
3108 (last_event == 0 || sig < last_event - hyst)) {
3109 ifmgd->last_cqm_event_signal = sig;
3110 ieee80211_cqm_rssi_notify(
3111 &sdata->vif,
3112 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3113 GFP_KERNEL);
3114 } else if (sig > thold &&
3115 (last_event == 0 || sig > last_event + hyst)) {
3116 ifmgd->last_cqm_event_signal = sig;
3117 ieee80211_cqm_rssi_notify(
3118 &sdata->vif,
3119 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3120 GFP_KERNEL);
3121 }
3122 }
3123
392b9ffb 3124 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
bdcbd8e0 3125 mlme_dbg_ratelimited(sdata,
112c31f0 3126 "cancelling AP probe due to a received beacon\n");
392b9ffb 3127 ieee80211_reset_ap_probe(sdata);
92778180
JM		 3128 }
3129
b291ba11
JB		 3130 /*
3131 * Push the beacon loss detection into the future since
3132 * we are processing a beacon from the AP just now.
3133 */
d3a910a8 3134 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 3135
d91f36db
JB		 3136 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3137 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
b2e506bf 3138 len - baselen, false, &elems,
d91f36db
JB		 3139 care_about_ies, ncrc);
3140
25c9c875 3141 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
f87ad637
RR		 3142 bool directed_tim = ieee80211_check_tim(elems.tim,
3143 elems.tim_len,
3144 ifmgd->aid);
1fb3606b 3145 if (directed_tim) {
572e0012 3146 if (local->hw.conf.dynamic_ps_timeout > 0) {
70b12f26
RW		 3147 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3148 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3149 ieee80211_hw_config(local,
3150 IEEE80211_CONF_CHANGE_PS);
3151 }
572e0012 3152 ieee80211_send_nullfunc(local, sdata, 0);
6f0756a3 3153 } else if (!local->pspolling && sdata->u.mgd.powersave) {
572e0012
KV		 3154 local->pspolling = true;
3155
3156 /*
3157 * Here is assumed that the driver will be
3158 * able to send ps-poll frame and receive a
3159 * response even though power save mode is
3160 * enabled, but some drivers might require
3161 * to disable power save here. This needs
3162 * to be investigated.
3163 */
3164 ieee80211_send_pspoll(local, sdata);
3165 }
a97b77b9
VN		 3166 }
3167 }
7a5158ef 3168
488dd7b5 3169 if (sdata->vif.p2p) {
67baf663 3170 struct ieee80211_p2p_noa_attr noa = {};
488dd7b5
JB		 3171 int ret;
3172
3173 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3174 len - baselen,
3175 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
934457ee 3176 (u8 *) &noa, sizeof(noa));
67baf663
JD		 3177 if (ret >= 2) {
3178 if (sdata->u.mgd.p2p_noa_index != noa.index) {
3179 /* valid noa_attr and index changed */
3180 sdata->u.mgd.p2p_noa_index = noa.index;
3181 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3182 changed |= BSS_CHANGED_P2P_PS;
3183 /*
3184 * make sure we update all information, the CRC
3185 * mechanism doesn't look at P2P attributes.
3186 */
3187 ifmgd->beacon_crc_valid = false;
3188 }
3189 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3190 /* noa_attr not found and we had valid noa_attr before */
3191 sdata->u.mgd.p2p_noa_index = -1;
3192 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
488dd7b5 3193 changed |= BSS_CHANGED_P2P_PS;
488dd7b5
JB		 3194 ifmgd->beacon_crc_valid = false;
3195 }
3196 }
3197
d8ec4433 3198 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
8d61ffa5 3199 return;
30196673 3200 ifmgd->beacon_crc = ncrc;
d8ec4433 3201 ifmgd->beacon_crc_valid = true;
30196673 3202
d45c4172 3203 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
7d25745d 3204
d70b7616
JB		 3205 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
3206 &elems, true);
3207
095d81ce
JB		 3208 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3209 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
7d25745d
JB		 3210 elems.wmm_param_len))
3211 changed |= BSS_CHANGED_QOS;
3212
c65dd147
EG		 3213 /*
3214 * If we haven't had a beacon before, tell the driver about the
ef429dad 3215 * DTIM period (and beacon timing if desired) now.
c65dd147 3216 */
989c6505 3217 if (!ifmgd->have_beacon) {
c65dd147
EG		 3218 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3219 if (elems.tim)
3220 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3221 else
3222 bss_conf->dtim_period = 1;
ef429dad
JB		 3223
3224 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3225 sdata->vif.bss_conf.sync_tsf =
3226 le64_to_cpu(mgmt->u.beacon.timestamp);
3227 sdata->vif.bss_conf.sync_device_ts =
3228 rx_status->device_timestamp;
3229 if (elems.tim)
3230 sdata->vif.bss_conf.sync_dtim_count =
3231 elems.tim->dtim_count;
3232 else
3233 sdata->vif.bss_conf.sync_dtim_count = 0;
3234 }
3235
989c6505
AB		 3236 changed |= BSS_CHANGED_BEACON_INFO;
3237 ifmgd->have_beacon = true;
482a9c74
AB		 3238
3239 mutex_lock(&local->iflist_mtx);
3240 ieee80211_recalc_ps(local, -1);
3241 mutex_unlock(&local->iflist_mtx);
3242
ce857888 3243 ieee80211_recalc_ps_vif(sdata);
c65dd147
EG		 3244 }
3245
1946bed9 3246 if (elems.erp_info) {
7a5158ef
JB		 3247 erp_valid = true;
3248 erp_value = elems.erp_info[0];
3249 } else {
3250 erp_valid = false;
50c4afb9 3251 }
7a5158ef
JB		 3252 changed |= ieee80211_handle_bss_capability(sdata,
3253 le16_to_cpu(mgmt->u.beacon.capab_info),
3254 erp_valid, erp_value);
f0706e82 3255
1128958d 3256 mutex_lock(&local->sta_mtx);
bee7f586
JB		 3257 sta = sta_info_get(sdata, bssid);
3258
53b954ee
EP		 3259 if (ieee80211_config_bw(sdata, sta,
3260 elems.ht_cap_elem, elems.ht_operation,
30eb1dc2
JB		 3261 elems.vht_operation, bssid, &changed)) {
3262 mutex_unlock(&local->sta_mtx);
3263 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3264 WLAN_REASON_DEAUTH_LEAVING,
3265 true, deauth_buf);
6ff57cf8
JB		 3266 cfg80211_tx_mlme_mgmt(sdata->dev, deauth_buf,
3267 sizeof(deauth_buf));
8d61ffa5 3268 return;
30eb1dc2 3269 }
bee7f586
JB		 3270
3271 if (sta && elems.opmode_notif)
3272 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3273 rx_status->band, true);
1128958d 3274 mutex_unlock(&local->sta_mtx);
d3c990fb 3275
24a4e400
SG		 3276 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
3277 elems.country_elem,
3278 elems.country_elem_len,
c8d65917
SG		 3279 elems.pwr_constr_elem,
3280 elems.cisco_dtpc_elem);
3f2355cb 3281
471b3efd 3282 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 3283}
3284
1fa57d01
JB		 3285void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3286 struct sk_buff *skb)
f0706e82
JB		 3287{
3288 struct ieee80211_rx_status *rx_status;
f0706e82
JB		 3289 struct ieee80211_mgmt *mgmt;
3290 u16 fc;
1b3a2e49
JB		 3291 struct ieee802_11_elems elems;
3292 int ies_len;
f0706e82 3293
f0706e82
JB		 3294 rx_status = (struct ieee80211_rx_status *) skb->cb;
3295 mgmt = (struct ieee80211_mgmt *) skb->data;
3296 fc = le16_to_cpu(mgmt->frame_control);
3297
8d61ffa5 3298 sdata_lock(sdata);
77fdaa12 3299
66e67e41
JB		 3300 switch (fc & IEEE80211_FCTL_STYPE) {
3301 case IEEE80211_STYPE_BEACON:
8d61ffa5 3302 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
66e67e41
JB		 3303 break;
3304 case IEEE80211_STYPE_PROBE_RESP:
3305 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3306 break;
3307 case IEEE80211_STYPE_AUTH:
8d61ffa5 3308 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
66e67e41
JB		 3309 break;
3310 case IEEE80211_STYPE_DEAUTH:
8d61ffa5 3311 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
66e67e41
JB		 3312 break;
3313 case IEEE80211_STYPE_DISASSOC:
8d61ffa5 3314 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
66e67e41
JB		 3315 break;
3316 case IEEE80211_STYPE_ASSOC_RESP:
3317 case IEEE80211_STYPE_REASSOC_RESP:
8d61ffa5 3318 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
66e67e41
JB		 3319 break;
3320 case IEEE80211_STYPE_ACTION:
37799e52 3321 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
1b3a2e49
JB		 3322 ies_len = skb->len -
3323 offsetof(struct ieee80211_mgmt,
3324 u.action.u.chan_switch.variable);
37799e52
JB		 3325
3326 if (ies_len < 0)
3327 break;
3328
3329 ieee802_11_parse_elems(
3330 mgmt->u.action.u.chan_switch.variable,
b2e506bf 3331 ies_len, true, &elems);
37799e52
JB		 3332
3333 if (elems.parse_error)
3334 break;
3335
1b3a2e49
JB		 3336 ieee80211_sta_process_chanswitch(sdata,
3337 rx_status->mactime,
04a161f4 3338 &elems, false);
1b3a2e49
JB		 3339 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3340 ies_len = skb->len -
3341 offsetof(struct ieee80211_mgmt,
3342 u.action.u.ext_chan_switch.variable);
3343
3344 if (ies_len < 0)
3345 break;
3346
3347 ieee802_11_parse_elems(
3348 mgmt->u.action.u.ext_chan_switch.variable,
b2e506bf 3349 ies_len, true, &elems);
1b3a2e49
JB		 3350
3351 if (elems.parse_error)
3352 break;
3353
3354 /* for the handling code pretend this was also an IE */
3355 elems.ext_chansw_ie =
3356 &mgmt->u.action.u.ext_chan_switch.data;
3357
66e67e41 3358 ieee80211_sta_process_chanswitch(sdata,
37799e52 3359 rx_status->mactime,
04a161f4 3360 &elems, false);
77fdaa12 3361 }
37799e52 3362 break;
77fdaa12 3363 }
8d61ffa5 3364 sdata_unlock(sdata);
f0706e82
JB		 3365}
3366
9c6bd790 3367static void ieee80211_sta_timer(unsigned long data)
f0706e82 3368{
60f8b39c
JB		 3369 struct ieee80211_sub_if_data *sdata =
3370 (struct ieee80211_sub_if_data *) data;
5bb644a0 3371
9b7d72c1 3372 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
f0706e82
JB		 3373}
3374
04ac3c0e 3375static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
6b684db1 3376 u8 *bssid, u8 reason, bool tx)
04ac3c0e 3377{
6ae16775 3378 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
04ac3c0e 3379
37ad3888 3380 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
6b684db1 3381 tx, frame_buf);
37ad3888 3382
6ff57cf8
JB		 3383 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3384 IEEE80211_DEAUTH_FRAME_LEN);
04ac3c0e
FF		 3385}
3386
66e67e41
JB		 3387static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
3388{
3389 struct ieee80211_local *local = sdata->local;
3390 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3391 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
1672c0e3 3392 u32 tx_flags = 0;
66e67e41 3393
8d61ffa5 3394 sdata_assert_lock(sdata);
66e67e41
JB		 3395
3396 if (WARN_ON_ONCE(!auth_data))
3397 return -EINVAL;
3398
66e67e41
JB		 3399 auth_data->tries++;
3400
3401 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
bdcbd8e0
JB		 3402 sdata_info(sdata, "authentication with %pM timed out\n",
3403 auth_data->bss->bssid);
66e67e41
JB		 3404
3405 /*
3406 * Most likely AP is not in the range so remove the
3407 * bss struct for that AP.
3408 */
3409 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3410
3411 return -ETIMEDOUT;
3412 }
3413
a1845fc7
JB		 3414 drv_mgd_prepare_tx(local, sdata);
3415
66e67e41 3416 if (auth_data->bss->proberesp_ies) {
6b8ece3a
JM		 3417 u16 trans = 1;
3418 u16 status = 0;
3419
bdcbd8e0
JB		 3420 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3421 auth_data->bss->bssid, auth_data->tries,
3422 IEEE80211_AUTH_MAX_TRIES);
66e67e41
JB		 3423
3424 auth_data->expected_transaction = 2;
6b8ece3a
JM		 3425
3426 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3427 trans = auth_data->sae_trans;
3428 status = auth_data->sae_status;
3429 auth_data->expected_transaction = trans;
3430 }
3431
6211dd12
SG		 3432 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3433 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3434 IEEE80211_TX_INTFL_MLME_CONN_TX;
3435
6b8ece3a
JM		 3436 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3437 auth_data->data, auth_data->data_len,
66e67e41 3438 auth_data->bss->bssid,
1672c0e3
JB		 3439 auth_data->bss->bssid, NULL, 0, 0,
3440 tx_flags);
66e67e41
JB		 3441 } else {
3442 const u8 *ssidie;
3443
bdcbd8e0
JB		 3444 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
3445 auth_data->bss->bssid, auth_data->tries,
3446 IEEE80211_AUTH_MAX_TRIES);
66e67e41 3447
9caf0364 3448 rcu_read_lock();
66e67e41 3449 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
9caf0364
JB		 3450 if (!ssidie) {
3451 rcu_read_unlock();
66e67e41 3452 return -EINVAL;
9caf0364 3453 }
66e67e41
JB		 3454 /*
3455 * Direct probe is sent to broadcast address as some APs
3456 * will not answer to direct packet in unassociated state.
3457 */
3458 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
6211dd12 3459 NULL, 0, (u32) -1, true, 0,
55de908a 3460 auth_data->bss->channel, false);
9caf0364 3461 rcu_read_unlock();
66e67e41
JB		 3462 }
3463
6211dd12 3464 if (tx_flags == 0) {
1672c0e3 3465 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
cb236d2d 3466 auth_data->timeout_started = true;
8d61ffa5 3467 run_again(sdata, auth_data->timeout);
89afe614 3468 } else {
cb236d2d
JB		 3469 auth_data->timeout =
3470 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3471 auth_data->timeout_started = true;
3472 run_again(sdata, auth_data->timeout);
1672c0e3 3473 }
66e67e41
JB		 3474
3475 return 0;
3476}
3477
3478static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3479{
3480 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3481 struct ieee80211_local *local = sdata->local;
3482
8d61ffa5 3483 sdata_assert_lock(sdata);
66e67e41 3484
66e67e41
JB		 3485 assoc_data->tries++;
3486 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
bdcbd8e0
JB		 3487 sdata_info(sdata, "association with %pM timed out\n",
3488 assoc_data->bss->bssid);
66e67e41
JB		 3489
3490 /*
3491 * Most likely AP is not in the range so remove the
3492 * bss struct for that AP.
3493 */
3494 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3495
3496 return -ETIMEDOUT;
3497 }
3498
bdcbd8e0
JB		 3499 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3500 assoc_data->bss->bssid, assoc_data->tries,
3501 IEEE80211_ASSOC_MAX_TRIES);
66e67e41
JB		 3502 ieee80211_send_assoc(sdata);
3503
1672c0e3
JB		 3504 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
3505 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
89afe614 3506 assoc_data->timeout_started = true;
8d61ffa5 3507 run_again(sdata, assoc_data->timeout);
89afe614 3508 } else {
cb236d2d
JB		 3509 assoc_data->timeout =
3510 round_jiffies_up(jiffies +
3511 IEEE80211_ASSOC_TIMEOUT_LONG);
3512 assoc_data->timeout_started = true;
3513 run_again(sdata, assoc_data->timeout);
1672c0e3 3514 }
66e67e41
JB		 3515
3516 return 0;
3517}
3518
1672c0e3
JB		 3519void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3520 __le16 fc, bool acked)
3521{
3522 struct ieee80211_local *local = sdata->local;
3523
3524 sdata->u.mgd.status_fc = fc;
3525 sdata->u.mgd.status_acked = acked;
3526 sdata->u.mgd.status_received = true;
3527
3528 ieee80211_queue_work(&local->hw, &sdata->work);
3529}
3530
1fa57d01 3531void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 3532{
9c6bd790 3533 struct ieee80211_local *local = sdata->local;
1fa57d01 3534 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 3535
8d61ffa5 3536 sdata_lock(sdata);
77fdaa12 3537
1672c0e3
JB		 3538 if (ifmgd->status_received) {
3539 __le16 fc = ifmgd->status_fc;
3540 bool status_acked = ifmgd->status_acked;
3541
3542 ifmgd->status_received = false;
3543 if (ifmgd->auth_data &&
3544 (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) {
3545 if (status_acked) {
3546 ifmgd->auth_data->timeout =
3547 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
8d61ffa5 3548 run_again(sdata, ifmgd->auth_data->timeout);
1672c0e3
JB		 3549 } else {
3550 ifmgd->auth_data->timeout = jiffies - 1;
3551 }
89afe614 3552 ifmgd->auth_data->timeout_started = true;
1672c0e3
JB		 3553 } else if (ifmgd->assoc_data &&
3554 (ieee80211_is_assoc_req(fc) ||
3555 ieee80211_is_reassoc_req(fc))) {
3556 if (status_acked) {
3557 ifmgd->assoc_data->timeout =
3558 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
8d61ffa5 3559 run_again(sdata, ifmgd->assoc_data->timeout);
1672c0e3
JB		 3560 } else {
3561 ifmgd->assoc_data->timeout = jiffies - 1;
3562 }
89afe614 3563 ifmgd->assoc_data->timeout_started = true;
1672c0e3
JB		 3564 }
3565 }
3566
89afe614 3567 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
66e67e41
JB		 3568 time_after(jiffies, ifmgd->auth_data->timeout)) {
3569 if (ifmgd->auth_data->done) {
3570 /*
3571 * ok ... we waited for assoc but userspace didn't,
3572 * so let's just kill the auth data
3573 */
3574 ieee80211_destroy_auth_data(sdata, false);
3575 } else if (ieee80211_probe_auth(sdata)) {
3576 u8 bssid[ETH_ALEN];
3577
3578 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3579
3580 ieee80211_destroy_auth_data(sdata, false);
3581
6ff57cf8 3582 cfg80211_auth_timeout(sdata->dev, bssid);
66e67e41 3583 }
89afe614 3584 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
8d61ffa5 3585 run_again(sdata, ifmgd->auth_data->timeout);
66e67e41 3586
89afe614 3587 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
66e67e41 3588 time_after(jiffies, ifmgd->assoc_data->timeout)) {
989c6505 3589 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
66e67e41 3590 ieee80211_do_assoc(sdata)) {
959867fa 3591 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
66e67e41
JB		 3592
3593 ieee80211_destroy_assoc_data(sdata, false);
959867fa 3594 cfg80211_assoc_timeout(sdata->dev, bss);
66e67e41 3595 }
89afe614 3596 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
8d61ffa5 3597 run_again(sdata, ifmgd->assoc_data->timeout);
66e67e41 3598
392b9ffb 3599 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
b291ba11 3600 ifmgd->associated) {
a43abf29 3601 u8 bssid[ETH_ALEN];
72a8a3ed 3602 int max_tries;
a43abf29 3603
0c1ad2ca 3604 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 3605
72a8a3ed 3606 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
180205bd 3607 max_tries = max_nullfunc_tries;
72a8a3ed 3608 else
180205bd 3609 max_tries = max_probe_tries;
72a8a3ed 3610
4e5ff376
FF		 3611 /* ACK received for nullfunc probing frame */
3612 if (!ifmgd->probe_send_count)
3613 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 3614 else if (ifmgd->nullfunc_failed) {
3615 if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3616 mlme_dbg(sdata,
3617 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3618 bssid, ifmgd->probe_send_count,
3619 max_tries);
04ac3c0e
FF		 3620 ieee80211_mgd_probe_ap_send(sdata);
3621 } else {
bdcbd8e0
JB		 3622 mlme_dbg(sdata,
3623 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3624 bssid);
95acac61 3625 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1
JB		 3626 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3627 false);
04ac3c0e
FF		 3628 }
3629 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
8d61ffa5 3630 run_again(sdata, ifmgd->probe_timeout);
04ac3c0e 3631 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
bdcbd8e0
JB		 3632 mlme_dbg(sdata,
3633 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3634 bssid, probe_wait_ms);
95acac61 3635 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 3636 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
04ac3c0e 3637 } else if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3638 mlme_dbg(sdata,
3639 "No probe response from AP %pM after %dms, try %d/%i\n",
3640 bssid, probe_wait_ms,
3641 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 3642 ieee80211_mgd_probe_ap_send(sdata);
3643 } else {
b291ba11
JB		 3644 /*
3645 * We actually lost the connection ... or did we?
3646 * Let's make sure!
3647 */
b38afa87
BG		 3648 wiphy_debug(local->hw.wiphy,
3649 "%s: No probe response from AP %pM"
3650 " after %dms, disconnecting.\n",
3651 sdata->name,
180205bd 3652 bssid, probe_wait_ms);
04ac3c0e 3653
95acac61 3654 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 3655 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
b291ba11
JB		 3656 }
3657 }
3658
8d61ffa5 3659 sdata_unlock(sdata);
f0706e82
JB		 3660}
3661
b291ba11
JB		 3662static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3663{
3664 struct ieee80211_sub_if_data *sdata =
3665 (struct ieee80211_sub_if_data *) data;
3666 struct ieee80211_local *local = sdata->local;
3667
3668 if (local->quiescing)
3669 return;
3670
e5593f56
MK		 3671 if (sdata->vif.csa_active)
3672 return;
3673
682bd38b 3674 sdata->u.mgd.connection_loss = false;
1e4dcd01
JO		 3675 ieee80211_queue_work(&sdata->local->hw,
3676 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 3677}
3678
3679static void ieee80211_sta_conn_mon_timer(unsigned long data)
3680{
3681 struct ieee80211_sub_if_data *sdata =
3682 (struct ieee80211_sub_if_data *) data;
3683 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3684 struct ieee80211_local *local = sdata->local;
3685
3686 if (local->quiescing)
3687 return;
3688
e5593f56
MK		 3689 if (sdata->vif.csa_active)
3690 return;
3691
42935eca 3692 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 3693}
3694
3695static void ieee80211_sta_monitor_work(struct work_struct *work)
3696{
3697 struct ieee80211_sub_if_data *sdata =
3698 container_of(work, struct ieee80211_sub_if_data,
3699 u.mgd.monitor_work);
3700
3701 ieee80211_mgd_probe_ap(sdata, false);
3702}
3703
9c6bd790
JB		 3704static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3705{
494f1fe5
EP		 3706 u32 flags;
3707
ad935687 3708 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
925e64c3 3709 __ieee80211_stop_poll(sdata);
ad935687 3710
b291ba11 3711 /* let's probe the connection once */
494f1fe5
EP		 3712 flags = sdata->local->hw.flags;
3713 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3714 ieee80211_queue_work(&sdata->local->hw,
3715 &sdata->u.mgd.monitor_work);
b291ba11 3716 /* and do all the other regular work too */
64592c8f 3717 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 3718 }
9c6bd790 3719}
f0706e82 3720
b8360ab8 3721#ifdef CONFIG_PM
1a1cb744
JB		 3722void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
3723{
3724 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3725 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3726
3727 sdata_lock(sdata);
3728
c52666ae
EG		 3729 if (ifmgd->auth_data || ifmgd->assoc_data) {
3730 const u8 *bssid = ifmgd->auth_data ?
3731 ifmgd->auth_data->bss->bssid :
3732 ifmgd->assoc_data->bss->bssid;
3733
1a1cb744 3734 /*
c52666ae
EG		 3735 * If we are trying to authenticate / associate while suspending,
3736 * cfg80211 won't know and won't actually abort those attempts,
3737 * thus we need to do that ourselves.
1a1cb744 3738 */
c52666ae 3739 ieee80211_send_deauth_disassoc(sdata, bssid,
1a1cb744
JB		 3740 IEEE80211_STYPE_DEAUTH,
3741 WLAN_REASON_DEAUTH_LEAVING,
3742 false, frame_buf);
c52666ae
EG		 3743 if (ifmgd->assoc_data)
3744 ieee80211_destroy_assoc_data(sdata, false);
3745 if (ifmgd->auth_data)
3746 ieee80211_destroy_auth_data(sdata, false);
1a1cb744
JB		 3747 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
3748 IEEE80211_DEAUTH_FRAME_LEN);
3749 }
3750
3751 sdata_unlock(sdata);
3752}
3753
b8360ab8
JB		 3754void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
3755{
3756 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3757
8d61ffa5 3758 sdata_lock(sdata);
b8360ab8 3759 if (!ifmgd->associated) {
8d61ffa5 3760 sdata_unlock(sdata);
b8360ab8
JB		 3761 return;
3762 }
3763
3764 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
3765 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
3766 mlme_dbg(sdata, "driver requested disconnect after resume\n");
3767 ieee80211_sta_connection_lost(sdata,
3768 ifmgd->associated->bssid,
3769 WLAN_REASON_UNSPECIFIED,
3770 true);
8d61ffa5 3771 sdata_unlock(sdata);
b8360ab8
JB		 3772 return;
3773 }
8d61ffa5 3774 sdata_unlock(sdata);
b8360ab8
JB		 3775}
3776#endif
3777
9c6bd790
JB		 3778/* interface setup */
3779void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 3780{
46900298 3781 struct ieee80211_if_managed *ifmgd;
988c0f72 3782
46900298 3783 ifmgd = &sdata->u.mgd;
b291ba11 3784 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 3785 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 3786 INIT_WORK(&ifmgd->beacon_connection_loss_work,
3787 ieee80211_beacon_connection_loss_work);
882a7c69
JB		 3788 INIT_WORK(&ifmgd->csa_connection_drop_work,
3789 ieee80211_csa_connection_drop_work);
687da132 3790 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
81dd2b88
AN		 3791 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
3792 ieee80211_tdls_peer_del_work);
46900298 3793 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 3794 (unsigned long) sdata);
b291ba11
JB		 3795 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
3796 (unsigned long) sdata);
3797 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
3798 (unsigned long) sdata);
46900298 3799 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 3800 (unsigned long) sdata);
9c6bd790 3801
ab1faead 3802 ifmgd->flags = 0;
1478acb3 3803 ifmgd->powersave = sdata->wdev.ps;
219c3867
AB		 3804 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
3805 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
67baf663 3806 ifmgd->p2p_noa_index = -1;
bbbdff9e 3807
0d8614b4 3808 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
0f78231b
JB		 3809 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
3810 else
3811 ifmgd->req_smps = IEEE80211_SMPS_OFF;
f0706e82
JB		 3812}
3813
77fdaa12
JB		 3814/* scan finished notification */
3815void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 3816{
31ee67a1 3817 struct ieee80211_sub_if_data *sdata;
60f8b39c 3818
77fdaa12
JB		 3819 /* Restart STA timers */
3820 rcu_read_lock();
370bd005
BG		 3821 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3822 if (ieee80211_sdata_running(sdata))
3823 ieee80211_restart_sta_timer(sdata);
3824 }
77fdaa12
JB		 3825 rcu_read_unlock();
3826}
60f8b39c 3827
77fdaa12
JB		 3828int ieee80211_max_network_latency(struct notifier_block *nb,
3829 unsigned long data, void *dummy)
3830{
3831 s32 latency_usec = (s32) data;
3832 struct ieee80211_local *local =
3833 container_of(nb, struct ieee80211_local,
3834 network_latency_notifier);
1fa6f4af 3835
77fdaa12
JB		 3836 mutex_lock(&local->iflist_mtx);
3837 ieee80211_recalc_ps(local, latency_usec);
3838 mutex_unlock(&local->iflist_mtx);
dfe67012 3839
8bd811aa 3840 return NOTIFY_OK;
9c6bd790
JB		 3841}
3842
f2d9d270
JB		 3843static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
3844 struct cfg80211_bss *cbss)
3845{
3846 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3847 const u8 *ht_cap_ie, *vht_cap_ie;
3848 const struct ieee80211_ht_cap *ht_cap;
3849 const struct ieee80211_vht_cap *vht_cap;
3850 u8 chains = 1;
3851
3852 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
3853 return chains;
3854
9caf0364 3855 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
f2d9d270
JB		 3856 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
3857 ht_cap = (void *)(ht_cap_ie + 2);
3858 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
3859 /*
3860 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
3861 * "Tx Unequal Modulation Supported" fields.
3862 */
3863 }
3864
3865 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
3866 return chains;
3867
9caf0364 3868 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
f2d9d270
JB		 3869 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
3870 u8 nss;
3871 u16 tx_mcs_map;
3872
3873 vht_cap = (void *)(vht_cap_ie + 2);
3874 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
3875 for (nss = 8; nss > 0; nss--) {
3876 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
3877 IEEE80211_VHT_MCS_NOT_SUPPORTED)
3878 break;
3879 }
3880 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
3881 chains = max(chains, nss);
3882 }
3883
3884 return chains;
3885}
3886
b17166a7
JB		 3887static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
3888 struct cfg80211_bss *cbss)
a1cf775d
JB		 3889{
3890 struct ieee80211_local *local = sdata->local;
3891 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
53b954ee 3892 const struct ieee80211_ht_cap *ht_cap = NULL;
24398e39 3893 const struct ieee80211_ht_operation *ht_oper = NULL;
f2d9d270 3894 const struct ieee80211_vht_operation *vht_oper = NULL;
24398e39 3895 struct ieee80211_supported_band *sband;
4bf88530 3896 struct cfg80211_chan_def chandef;
f2d9d270 3897 int ret;
a1cf775d 3898
24398e39
JB		 3899 sband = local->hw.wiphy->bands[cbss->channel->band];
3900
f2d9d270
JB		 3901 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
3902 IEEE80211_STA_DISABLE_80P80MHZ |
3903 IEEE80211_STA_DISABLE_160MHZ);
3904
9caf0364
JB		 3905 rcu_read_lock();
3906
f2d9d270
JB		 3907 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3908 sband->ht_cap.ht_supported) {
53b954ee 3909 const u8 *ht_oper_ie, *ht_cap_ie;
24398e39 3910
9caf0364 3911 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
24398e39
JB		 3912 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3913 ht_oper = (void *)(ht_oper_ie + 2);
08e6effa 3914
53b954ee
EP		 3915 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
3916 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
3917 ht_cap = (void *)(ht_cap_ie + 2);
3918
3919 if (!ht_cap) {
08e6effa
JB		 3920 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3921 ht_oper = NULL;
3922 }
24398e39
JB		 3923 }
3924
f2d9d270
JB		 3925 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3926 sband->vht_cap.vht_supported) {
08e6effa 3927 const u8 *vht_oper_ie, *vht_cap;
f2d9d270 3928
9caf0364
JB		 3929 vht_oper_ie = ieee80211_bss_get_ie(cbss,
3930 WLAN_EID_VHT_OPERATION);
f2d9d270
JB		 3931 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
3932 vht_oper = (void *)(vht_oper_ie + 2);
3933 if (vht_oper && !ht_oper) {
3934 vht_oper = NULL;
bdcbd8e0 3935 sdata_info(sdata,
f2d9d270 3936 "AP advertised VHT without HT, disabling both\n");
cb145022
JB		 3937 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3938 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
24398e39 3939 }
08e6effa
JB		 3940
3941 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
3942 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
3943 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3944 vht_oper = NULL;
3945 }
24398e39
JB		 3946 }
3947
f2d9d270
JB		 3948 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
3949 cbss->channel,
53b954ee 3950 ht_cap, ht_oper, vht_oper,
5cdaed1e 3951 &chandef, false);
04ecd257 3952
f2d9d270
JB		 3953 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
3954 local->rx_chains);
24398e39 3955
9caf0364
JB		 3956 rcu_read_unlock();
3957
04ecd257
JB		 3958 /* will change later if needed */
3959 sdata->smps_mode = IEEE80211_SMPS_OFF;
3960
34a3740d 3961 mutex_lock(&local->mtx);
f2d9d270
JB		 3962 /*
3963 * If this fails (possibly due to channel context sharing
3964 * on incompatible channels, e.g. 80+80 and 160 sharing the
3965 * same control channel) try to use a smaller bandwidth.
3966 */
3967 ret = ieee80211_vif_use_channel(sdata, &chandef,
3968 IEEE80211_CHANCTX_SHARED);
0418a445
SW		 3969
3970 /* don't downgrade for 5 and 10 MHz channels, though. */
3971 if (chandef.width == NL80211_CHAN_WIDTH_5 ||
3972 chandef.width == NL80211_CHAN_WIDTH_10)
34a3740d 3973 goto out;
0418a445 3974
d601cd8d 3975 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
e6b7cde4 3976 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
d601cd8d
JB		 3977 ret = ieee80211_vif_use_channel(sdata, &chandef,
3978 IEEE80211_CHANCTX_SHARED);
3979 }
34a3740d
JB		 3980 out:
3981 mutex_unlock(&local->mtx);
f2d9d270 3982 return ret;
b17166a7
JB		 3983}
3984
3985static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
3986 struct cfg80211_bss *cbss, bool assoc)
3987{
3988 struct ieee80211_local *local = sdata->local;
3989 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3990 struct ieee80211_bss *bss = (void *)cbss->priv;
3991 struct sta_info *new_sta = NULL;
3992 bool have_sta = false;
3993 int err;
3994
3995 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3996 return -EINVAL;
3997
3998 if (assoc) {
3999 rcu_read_lock();
4000 have_sta = sta_info_get(sdata, cbss->bssid);
4001 rcu_read_unlock();
4002 }
4003
4004 if (!have_sta) {
4005 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4006 if (!new_sta)
4007 return -ENOMEM;
4008 }
13e0c8e3 4009 if (new_sta) {
5d6a1b06
JB		 4010 u32 rates = 0, basic_rates = 0;
4011 bool have_higher_than_11mbit;
4012 int min_rate = INT_MAX, min_rate_index = -1;
2103dec1 4013 struct ieee80211_chanctx_conf *chanctx_conf;
b17166a7 4014 struct ieee80211_supported_band *sband;
8cef2c9d 4015 const struct cfg80211_bss_ies *ies;
2103dec1
SW		 4016 int shift;
4017 u32 rate_flags;
b17166a7
JB		 4018
4019 sband = local->hw.wiphy->bands[cbss->channel->band];
4020
4021 err = ieee80211_prep_channel(sdata, cbss);
4022 if (err) {
4023 sta_info_free(local, new_sta);
2103dec1 4024 return -EINVAL;
b17166a7 4025 }
2103dec1
SW		 4026 shift = ieee80211_vif_get_shift(&sdata->vif);
4027
4028 rcu_read_lock();
4029 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4030 if (WARN_ON(!chanctx_conf)) {
4031 rcu_read_unlock();
c368ddaa 4032 sta_info_free(local, new_sta);
2103dec1
SW		 4033 return -EINVAL;
4034 }
4035 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
4036 rcu_read_unlock();
5d6a1b06 4037
5d6a1b06
JB		 4038 ieee80211_get_rates(sband, bss->supp_rates,
4039 bss->supp_rates_len,
4040 &rates, &basic_rates,
4041 &have_higher_than_11mbit,
2103dec1
SW		 4042 &min_rate, &min_rate_index,
4043 shift, rate_flags);
5d6a1b06
JB		 4044
4045 /*
4046 * This used to be a workaround for basic rates missing
4047 * in the association response frame. Now that we no
4048 * longer use the basic rates from there, it probably
4049 * doesn't happen any more, but keep the workaround so
4050 * in case some *other* APs are buggy in different ways
4051 * we can connect -- with a warning.
4052 */
4053 if (!basic_rates && min_rate_index >= 0) {
bdcbd8e0
JB		 4054 sdata_info(sdata,
4055 "No basic rates, using min rate instead\n");
5d6a1b06
JB		 4056 basic_rates = BIT(min_rate_index);
4057 }
4058
13e0c8e3 4059 new_sta->sta.supp_rates[cbss->channel->band] = rates;
5d6a1b06
JB		 4060 sdata->vif.bss_conf.basic_rates = basic_rates;
4061
4062 /* cf. IEEE 802.11 9.2.12 */
55de908a 4063 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
5d6a1b06
JB		 4064 have_higher_than_11mbit)
4065 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
4066 else
4067 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
4068
4069 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
4070
8c358bcd
JB		 4071 /* set timing information */
4072 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
8cef2c9d 4073 rcu_read_lock();
ef429dad
JB		 4074 ies = rcu_dereference(cbss->beacon_ies);
4075 if (ies) {
4076 const u8 *tim_ie;
4077
4078 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4079 sdata->vif.bss_conf.sync_device_ts =
4080 bss->device_ts_beacon;
4081 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4082 ies->data, ies->len);
4083 if (tim_ie && tim_ie[1] >= 2)
4084 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
4085 else
4086 sdata->vif.bss_conf.sync_dtim_count = 0;
4087 } else if (!(local->hw.flags &
4088 IEEE80211_HW_TIMING_BEACON_ONLY)) {
4089 ies = rcu_dereference(cbss->proberesp_ies);
4090 /* must be non-NULL since beacon IEs were NULL */
4091 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4092 sdata->vif.bss_conf.sync_device_ts =
4093 bss->device_ts_presp;
4094 sdata->vif.bss_conf.sync_dtim_count = 0;
4095 } else {
4096 sdata->vif.bss_conf.sync_tsf = 0;
4097 sdata->vif.bss_conf.sync_device_ts = 0;
4098 sdata->vif.bss_conf.sync_dtim_count = 0;
4099 }
8cef2c9d 4100 rcu_read_unlock();
8c358bcd
JB		 4101
4102 /* tell driver about BSSID, basic rates and timing */
5d6a1b06 4103 ieee80211_bss_info_change_notify(sdata,
8c358bcd
JB		 4104 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4105 BSS_CHANGED_BEACON_INT);
a1cf775d
JB		 4106
4107 if (assoc)
13e0c8e3 4108 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
a1cf775d 4109
13e0c8e3
JB		 4110 err = sta_info_insert(new_sta);
4111 new_sta = NULL;
a1cf775d 4112 if (err) {
bdcbd8e0
JB		 4113 sdata_info(sdata,
4114 "failed to insert STA entry for the AP (error %d)\n",
4115 err);
a1cf775d
JB		 4116 return err;
4117 }
4118 } else
b203ca39 4119 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
a1cf775d
JB		 4120
4121 return 0;
4122}
4123
77fdaa12
JB		 4124/* config hooks */
4125int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4126 struct cfg80211_auth_request *req)
9c6bd790 4127{
66e67e41
JB		 4128 struct ieee80211_local *local = sdata->local;
4129 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4130 struct ieee80211_mgd_auth_data *auth_data;
77fdaa12 4131 u16 auth_alg;
66e67e41
JB		 4132 int err;
4133
4134 /* prepare auth data structure */
9c6bd790 4135
77fdaa12
JB		 4136 switch (req->auth_type) {
4137 case NL80211_AUTHTYPE_OPEN_SYSTEM:
4138 auth_alg = WLAN_AUTH_OPEN;
4139 break;
4140 case NL80211_AUTHTYPE_SHARED_KEY:
66e67e41 4141 if (IS_ERR(local->wep_tx_tfm))
9dca9c49 4142 return -EOPNOTSUPP;
77fdaa12
JB		 4143 auth_alg = WLAN_AUTH_SHARED_KEY;
4144 break;
4145 case NL80211_AUTHTYPE_FT:
4146 auth_alg = WLAN_AUTH_FT;
4147 break;
4148 case NL80211_AUTHTYPE_NETWORK_EAP:
4149 auth_alg = WLAN_AUTH_LEAP;
4150 break;
6b8ece3a
JM		 4151 case NL80211_AUTHTYPE_SAE:
4152 auth_alg = WLAN_AUTH_SAE;
4153 break;
77fdaa12
JB		 4154 default:
4155 return -EOPNOTSUPP;
60f8b39c 4156 }
77fdaa12 4157
6b8ece3a
JM		 4158 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
4159 req->ie_len, GFP_KERNEL);
66e67e41 4160 if (!auth_data)
9c6bd790 4161 return -ENOMEM;
77fdaa12 4162
66e67e41 4163 auth_data->bss = req->bss;
77fdaa12 4164
6b8ece3a
JM		 4165 if (req->sae_data_len >= 4) {
4166 __le16 *pos = (__le16 *) req->sae_data;
4167 auth_data->sae_trans = le16_to_cpu(pos[0]);
4168 auth_data->sae_status = le16_to_cpu(pos[1]);
4169 memcpy(auth_data->data, req->sae_data + 4,
4170 req->sae_data_len - 4);
4171 auth_data->data_len += req->sae_data_len - 4;
4172 }
4173
77fdaa12 4174 if (req->ie && req->ie_len) {
6b8ece3a
JM		 4175 memcpy(&auth_data->data[auth_data->data_len],
4176 req->ie, req->ie_len);
4177 auth_data->data_len += req->ie_len;
9c6bd790 4178 }
77fdaa12 4179
fffd0934 4180 if (req->key && req->key_len) {
66e67e41
JB		 4181 auth_data->key_len = req->key_len;
4182 auth_data->key_idx = req->key_idx;
4183 memcpy(auth_data->key, req->key, req->key_len);
fffd0934
JB		 4184 }
4185
66e67e41 4186 auth_data->algorithm = auth_alg;
60f8b39c 4187
66e67e41 4188 /* try to authenticate/probe */
2a33bee2 4189
66e67e41
JB		 4190 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4191 ifmgd->assoc_data) {
4192 err = -EBUSY;
4193 goto err_free;
2a33bee2
GE		 4194 }
4195
66e67e41
JB		 4196 if (ifmgd->auth_data)
4197 ieee80211_destroy_auth_data(sdata, false);
2a33bee2 4198
66e67e41
JB		 4199 /* prep auth_data so we don't go into idle on disassoc */
4200 ifmgd->auth_data = auth_data;
af6b6374 4201
7b119dc0
JB		 4202 if (ifmgd->associated) {
4203 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4204
4205 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4206 WLAN_REASON_UNSPECIFIED,
4207 false, frame_buf);
4208
6ff57cf8
JB		 4209 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4210 sizeof(frame_buf));
7b119dc0 4211 }
af6b6374 4212
bdcbd8e0 4213 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
e5b900d2 4214
a1cf775d
JB		 4215 err = ieee80211_prep_connection(sdata, req->bss, false);
4216 if (err)
66e67e41 4217 goto err_clear;
af6b6374 4218
66e67e41
JB		 4219 err = ieee80211_probe_auth(sdata);
4220 if (err) {
66e67e41
JB		 4221 sta_info_destroy_addr(sdata, req->bss->bssid);
4222 goto err_clear;
4223 }
4224
4225 /* hold our own reference */
5b112d3d 4226 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
8d61ffa5 4227 return 0;
66e67e41
JB		 4228
4229 err_clear:
3d2abdfd
EP		 4230 memset(ifmgd->bssid, 0, ETH_ALEN);
4231 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 4232 ifmgd->auth_data = NULL;
4233 err_free:
4234 kfree(auth_data);
66e67e41 4235 return err;
af6b6374
JB		 4236}
4237
095d81ce
JB		 4238static bool ieee80211_usable_wmm_params(struct ieee80211_sub_if_data *sdata,
4239 const u8 *wmm_param, int len)
4240{
4241 const u8 *pos;
4242 size_t left;
4243
4244 if (len < 8)
4245 return false;
4246
4247 if (wmm_param[5] != 1 /* version */)
4248 return false;
4249
4250 pos = wmm_param + 8;
4251 left = len - 8;
4252
4253 for (; left >= 4; left -= 4, pos += 4) {
4254 u8 aifsn = pos[0] & 0x0f;
4255 u8 ecwmin = pos[1] & 0x0f;
4256 u8 ecwmax = (pos[1] & 0xf0) >> 4;
4257 int aci = (pos[0] >> 5) & 0x03;
4258
4259 if (aifsn < 2) {
4260 sdata_info(sdata,
4261 "AP has invalid WMM params (AIFSN=%d for ACI %d), disabling WMM\n",
4262 aifsn, aci);
4263 return false;
4264 }
4265 if (ecwmin > ecwmax) {
4266 sdata_info(sdata,
4267 "AP has invalid WMM params (ECWmin/max=%d/%d for ACI %d), disabling WMM\n",
4268 ecwmin, ecwmax, aci);
4269 return false;
4270 }
4271 }
4272
4273 return true;
4274}
4275
77fdaa12
JB		 4276int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4277 struct cfg80211_assoc_request *req)
f0706e82 4278{
66e67e41 4279 struct ieee80211_local *local = sdata->local;
77fdaa12 4280 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 4281 struct ieee80211_bss *bss = (void *)req->bss->priv;
66e67e41 4282 struct ieee80211_mgd_assoc_data *assoc_data;
c65dd147 4283 const struct cfg80211_bss_ies *beacon_ies;
4e74bfdb 4284 struct ieee80211_supported_band *sband;
b08fbbd8 4285 const u8 *ssidie, *ht_ie, *vht_ie;
2a33bee2 4286 int i, err;
f0706e82 4287
66e67e41
JB		 4288 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4289 if (!assoc_data)
4290 return -ENOMEM;
4291
9caf0364
JB		 4292 rcu_read_lock();
4293 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4294 if (!ssidie) {
4295 rcu_read_unlock();
4296 kfree(assoc_data);
4297 return -EINVAL;
4298 }
4299 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4300 assoc_data->ssid_len = ssidie[1];
4301 rcu_read_unlock();
4302
7b119dc0
JB		 4303 if (ifmgd->associated) {
4304 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4305
4306 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4307 WLAN_REASON_UNSPECIFIED,
4308 false, frame_buf);
4309
6ff57cf8
JB		 4310 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4311 sizeof(frame_buf));
7b119dc0 4312 }
66e67e41
JB		 4313
4314 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4315 err = -EBUSY;
4316 goto err_free;
af6b6374 4317 }
77fdaa12 4318
66e67e41
JB		 4319 if (ifmgd->assoc_data) {
4320 err = -EBUSY;
4321 goto err_free;
4322 }
77fdaa12 4323
66e67e41
JB		 4324 if (ifmgd->auth_data) {
4325 bool match;
4326
4327 /* keep sta info, bssid if matching */
b203ca39 4328 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
66e67e41 4329 ieee80211_destroy_auth_data(sdata, match);
2a33bee2
GE		 4330 }
4331
66e67e41 4332 /* prepare assoc data */
095d81ce 4333
d8ec4433
JO		 4334 ifmgd->beacon_crc_valid = false;
4335
095d81ce
JB		 4336 assoc_data->wmm = bss->wmm_used &&
4337 (local->hw.queues >= IEEE80211_NUM_ACS);
4338 if (assoc_data->wmm) {
4339 /* try to check validity of WMM params IE */
4340 const struct cfg80211_bss_ies *ies;
4341 const u8 *wp, *start, *end;
4342
4343 rcu_read_lock();
4344 ies = rcu_dereference(req->bss->ies);
4345 start = ies->data;
4346 end = start + ies->len;
4347
4348 while (true) {
4349 wp = cfg80211_find_vendor_ie(
4350 WLAN_OUI_MICROSOFT,
4351 WLAN_OUI_TYPE_MICROSOFT_WMM,
4352 start, end - start);
4353 if (!wp)
4354 break;
4355 start = wp + wp[1] + 2;
4356 /* if this IE is too short, try the next */
4357 if (wp[1] <= 4)
4358 continue;
4359 /* if this IE is WMM params, we found what we wanted */
4360 if (wp[6] == 1)
4361 break;
4362 }
4363
4364 if (!wp || !ieee80211_usable_wmm_params(sdata, wp + 2,
4365 wp[1] - 2)) {
4366 assoc_data->wmm = false;
4367 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
4368 }
4369 rcu_read_unlock();
4370 }
4371
de5036aa
JB		 4372 /*
4373 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4374 * We still associate in non-HT mode (11a/b/g) if any one of these
4375 * ciphers is configured as pairwise.
4376 * We can set this to true for non-11n hardware, that'll be checked
4377 * separately along with the peer capabilities.
4378 */
1c4cb928 4379 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
77fdaa12
JB		 4380 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4381 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
1c4cb928 4382 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
a8243b72 4383 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
d545daba 4384 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
1c4cb928 4385 netdev_info(sdata->dev,
d545daba 4386 "disabling HT/VHT due to WEP/TKIP use\n");
1c4cb928
JB		 4387 }
4388 }
77fdaa12 4389
d545daba 4390 if (req->flags & ASSOC_REQ_DISABLE_HT) {
a8243b72 4391 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
d545daba
MP		 4392 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4393 }
ef96a842 4394
dd5ecfea
JB		 4395 if (req->flags & ASSOC_REQ_DISABLE_VHT)
4396 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4397
4e74bfdb
JB		 4398 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4399 sband = local->hw.wiphy->bands[req->bss->channel->band];
4400 if (!sband->ht_cap.ht_supported ||
095d81ce
JB		 4401 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4402 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
a8243b72 4403 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
095d81ce
JB		 4404 if (!bss->wmm_used &&
4405 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
1b49de26
JB		 4406 netdev_info(sdata->dev,
4407 "disabling HT as WMM/QoS is not supported by the AP\n");
1c4cb928 4408 }
4e74bfdb 4409
d545daba
MP		 4410 /* disable VHT if we don't support it or the AP doesn't use WMM */
4411 if (!sband->vht_cap.vht_supported ||
095d81ce
JB		 4412 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4413 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
d545daba 4414 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
095d81ce
JB		 4415 if (!bss->wmm_used &&
4416 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
1b49de26
JB		 4417 netdev_info(sdata->dev,
4418 "disabling VHT as WMM/QoS is not supported by the AP\n");
d545daba
MP		 4419 }
4420
ef96a842
BG		 4421 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4422 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4423 sizeof(ifmgd->ht_capa_mask));
4424
dd5ecfea
JB		 4425 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4426 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4427 sizeof(ifmgd->vht_capa_mask));
4428
77fdaa12 4429 if (req->ie && req->ie_len) {
66e67e41
JB		 4430 memcpy(assoc_data->ie, req->ie, req->ie_len);
4431 assoc_data->ie_len = req->ie_len;
4432 }
f679f65d 4433
66e67e41 4434 assoc_data->bss = req->bss;
f679f65d 4435
af6b6374
JB		 4436 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4437 if (ifmgd->powersave)
04ecd257 4438 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
af6b6374 4439 else
04ecd257 4440 sdata->smps_mode = IEEE80211_SMPS_OFF;
af6b6374 4441 } else
04ecd257 4442 sdata->smps_mode = ifmgd->req_smps;
af6b6374 4443
66e67e41 4444 assoc_data->capability = req->bss->capability;
66e67e41
JB		 4445 assoc_data->supp_rates = bss->supp_rates;
4446 assoc_data->supp_rates_len = bss->supp_rates_len;
9dde6423 4447
9caf0364 4448 rcu_read_lock();
9dde6423
JB		 4449 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4450 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4451 assoc_data->ap_ht_param =
4452 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4453 else
a8243b72 4454 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
b08fbbd8
JB		 4455 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4456 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4457 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4458 sizeof(struct ieee80211_vht_cap));
4459 else
4460 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
9caf0364 4461 rcu_read_unlock();
63f170e0 4462
ab13315a 4463 if (bss->wmm_used && bss->uapsd_supported &&
bb512ad0 4464 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
76f0303d 4465 assoc_data->uapsd = true;
ab13315a
KV		 4466 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4467 } else {
76f0303d 4468 assoc_data->uapsd = false;
ab13315a
KV		 4469 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4470 }
4471
77fdaa12 4472 if (req->prev_bssid)
66e67e41 4473 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12
JB		 4474
4475 if (req->use_mfp) {
4476 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4477 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4478 } else {
4479 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4480 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4481 }
4482
cd2f5dd7
AK		 4483 if (req->flags & ASSOC_REQ_USE_RRM)
4484 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
4485 else
4486 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
4487
77fdaa12
JB		 4488 if (req->crypto.control_port)
4489 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4490 else
4491 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4492
a621fa4d
JB		 4493 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4494 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
2475b1cc
MS		 4495 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
4496 sdata->vif.type);
a621fa4d 4497
66e67e41
JB		 4498 /* kick off associate process */
4499
4500 ifmgd->assoc_data = assoc_data;
826262c3 4501 ifmgd->dtim_period = 0;
989c6505 4502 ifmgd->have_beacon = false;
66e67e41 4503
a1cf775d
JB		 4504 err = ieee80211_prep_connection(sdata, req->bss, true);
4505 if (err)
4506 goto err_clear;
66e67e41 4507
c65dd147
EG		 4508 rcu_read_lock();
4509 beacon_ies = rcu_dereference(req->bss->beacon_ies);
826262c3 4510
c65dd147
EG		 4511 if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC &&
4512 !beacon_ies) {
4513 /*
4514 * Wait up to one beacon interval ...
4515 * should this be more if we miss one?
4516 */
4517 sdata_info(sdata, "waiting for beacon from %pM\n",
4518 ifmgd->bssid);
4519 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
89afe614 4520 assoc_data->timeout_started = true;
c65dd147
EG		 4521 assoc_data->need_beacon = true;
4522 } else if (beacon_ies) {
4523 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4524 beacon_ies->data,
4525 beacon_ies->len);
ef429dad
JB		 4526 u8 dtim_count = 0;
4527
c65dd147
EG		 4528 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4529 const struct ieee80211_tim_ie *tim;
4530 tim = (void *)(tim_ie + 2);
4531 ifmgd->dtim_period = tim->dtim_period;
ef429dad 4532 dtim_count = tim->dtim_count;
826262c3 4533 }
989c6505 4534 ifmgd->have_beacon = true;
66e67e41 4535 assoc_data->timeout = jiffies;
89afe614 4536 assoc_data->timeout_started = true;
ef429dad
JB		 4537
4538 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
4539 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4540 sdata->vif.bss_conf.sync_device_ts =
4541 bss->device_ts_beacon;
4542 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4543 }
c65dd147
EG		 4544 } else {
4545 assoc_data->timeout = jiffies;
89afe614 4546 assoc_data->timeout_started = true;
66e67e41 4547 }
c65dd147
EG		 4548 rcu_read_unlock();
4549
8d61ffa5 4550 run_again(sdata, assoc_data->timeout);
66e67e41 4551
fcff4f10
PS		 4552 if (bss->corrupt_data) {
4553 char *corrupt_type = "data";
4554 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4555 if (bss->corrupt_data &
4556 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4557 corrupt_type = "beacon and probe response";
4558 else
4559 corrupt_type = "beacon";
4560 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4561 corrupt_type = "probe response";
bdcbd8e0
JB		 4562 sdata_info(sdata, "associating with AP with corrupt %s\n",
4563 corrupt_type);
fcff4f10
PS		 4564 }
4565
8d61ffa5 4566 return 0;
66e67e41 4567 err_clear:
3d2abdfd
EP		 4568 memset(ifmgd->bssid, 0, ETH_ALEN);
4569 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 4570 ifmgd->assoc_data = NULL;
4571 err_free:
4572 kfree(assoc_data);
66e67e41 4573 return err;
f0706e82
JB		 4574}
4575
77fdaa12 4576int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
63c9c5e7 4577 struct cfg80211_deauth_request *req)
f0706e82 4578{
46900298 4579 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 4580 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
6863255b 4581 bool tx = !req->local_state_change;
f0706e82 4582
c9c3a060
JB		 4583 if (ifmgd->auth_data &&
4584 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
4585 sdata_info(sdata,
4586 "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
4587 req->bssid, req->reason_code,
4588 ieee80211_get_reason_code_string(req->reason_code));
0ff71613 4589
8c7d857c 4590 drv_mgd_prepare_tx(sdata->local, sdata);
37ad3888
JB		 4591 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4592 IEEE80211_STYPE_DEAUTH,
6863255b 4593 req->reason_code, tx,
37ad3888 4594 frame_buf);
86552017 4595 ieee80211_destroy_auth_data(sdata, false);
c9c3a060
JB		 4596 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4597 IEEE80211_DEAUTH_FRAME_LEN);
86552017 4598
c9c3a060 4599 return 0;
8c7d857c
EG		 4600 }
4601
86552017
JB		 4602 if (ifmgd->associated &&
4603 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
c9c3a060
JB		 4604 sdata_info(sdata,
4605 "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
4606 req->bssid, req->reason_code,
4607 ieee80211_get_reason_code_string(req->reason_code));
4608
86552017
JB		 4609 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4610 req->reason_code, tx, frame_buf);
6ff57cf8
JB		 4611 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4612 IEEE80211_DEAUTH_FRAME_LEN);
c9c3a060
JB		 4613 return 0;
4614 }
86552017 4615
c9c3a060 4616 return -ENOTCONN;
f0706e82 4617}
84363e6e 4618
77fdaa12 4619int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 4620 struct cfg80211_disassoc_request *req)
9c6bd790 4621{
77fdaa12 4622 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 4623 u8 bssid[ETH_ALEN];
6ae16775 4624 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
9c6bd790 4625
8d8b261a
JB		 4626 /*
4627 * cfg80211 should catch this ... but it's racy since
4628 * we can receive a disassoc frame, process it, hand it
4629 * to cfg80211 while that's in a locked section already
4630 * trying to tell us that the user wants to disconnect.
4631 */
8d61ffa5 4632 if (ifmgd->associated != req->bss)
77fdaa12 4633 return -ENOLINK;
77fdaa12 4634
bdcbd8e0 4635 sdata_info(sdata,
dfa1ad29
CO		 4636 "disassociating from %pM by local choice (Reason: %u=%s)\n",
4637 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
0ff71613 4638
e69e95db 4639 memcpy(bssid, req->bss->bssid, ETH_ALEN);
37ad3888
JB		 4640 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4641 req->reason_code, !req->local_state_change,
4642 frame_buf);
10f644a4 4643
6ff57cf8
JB		 4644 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4645 IEEE80211_DEAUTH_FRAME_LEN);
bc83b681 4646
10f644a4
JB		 4647 return 0;
4648}
026331c4 4649
afa762f6 4650void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
54e4ffb2
JB		 4651{
4652 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4653
49921859
BG		 4654 /*
4655 * Make sure some work items will not run after this,
4656 * they will not do anything but might not have been
4657 * cancelled when disconnecting.
4658 */
4659 cancel_work_sync(&ifmgd->monitor_work);
4660 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
4661 cancel_work_sync(&ifmgd->request_smps_work);
4662 cancel_work_sync(&ifmgd->csa_connection_drop_work);
4663 cancel_work_sync(&ifmgd->chswitch_work);
81dd2b88 4664 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
49921859 4665
8d61ffa5 4666 sdata_lock(sdata);
959867fa
JB		 4667 if (ifmgd->assoc_data) {
4668 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
54e4ffb2 4669 ieee80211_destroy_assoc_data(sdata, false);
959867fa
JB		 4670 cfg80211_assoc_timeout(sdata->dev, bss);
4671 }
54e4ffb2
JB		 4672 if (ifmgd->auth_data)
4673 ieee80211_destroy_auth_data(sdata, false);
4674 del_timer_sync(&ifmgd->timer);
8d61ffa5 4675 sdata_unlock(sdata);
54e4ffb2
JB		 4676}
4677
a97c13c3
JO		 4678void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
4679 enum nl80211_cqm_rssi_threshold_event rssi_event,
4680 gfp_t gfp)
4681{
4682 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4683
b5878a2d
JB		 4684 trace_api_cqm_rssi_notify(sdata, rssi_event);
4685
a97c13c3
JO		 4686 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
4687}
4688EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
Linux kernel - Deliverables
This page took 1.038547 seconds and 5 git commands to generate.