]> git.proxmox.com Git - mirror_ubuntu-bionic-kernel.git/blame - net/mac80211/mlme.c
projects / mirror_ubuntu-bionic-kernel.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
mac80211: account TX MSDUs properly with segmentation offload
[mirror_ubuntu-bionic-kernel.git] / net / mac80211 / mlme.c
CommitLineData
f0706e82
JB		 1/*
2 * BSS client mode implementation
5394af4d 3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
f0706e82
JB		 4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
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
30686bf7 121 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
7eeff74c
JB		 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
30686bf7 137 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
be099e82
LR		 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 159 struct cfg80211_chan_def vht_chandef;
179b8fc7 160 struct ieee80211_sta_ht_cap sta_ht_cap;
6565ec9b
JB		 161 u32 ht_cfreq, ret;
162
179b8fc7
CRI		 163 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
164 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
165
6565ec9b
JB		 166 chandef->chan = channel;
167 chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
168 chandef->center_freq1 = channel->center_freq;
169 chandef->center_freq2 = 0;
170
179b8fc7 171 if (!ht_cap || !ht_oper || !sta_ht_cap.ht_supported) {
6565ec9b
JB		 172 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
173 goto out;
174 }
175
176 chandef->width = NL80211_CHAN_WIDTH_20;
177
53b954ee
EP		 178 if (!(ht_cap->cap_info &
179 cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40))) {
f3000e1b 180 ret = IEEE80211_STA_DISABLE_40MHZ;
7e6225a1 181 vht_chandef = *chandef;
53b954ee
EP		 182 goto out;
183 }
184
6565ec9b
JB		 185 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
186 channel->band);
187 /* check that channel matches the right operating channel */
5cdaed1e 188 if (!tracking && channel->center_freq != ht_cfreq) {
6565ec9b
JB		 189 /*
190 * It's possible that some APs are confused here;
191 * Netgear WNDR3700 sometimes reports 4 higher than
192 * the actual channel in association responses, but
193 * since we look at probe response/beacon data here
194 * it should be OK.
195 */
5cdaed1e
JB		 196 sdata_info(sdata,
197 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
198 channel->center_freq, ht_cfreq,
199 ht_oper->primary_chan, channel->band);
6565ec9b
JB		 200 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
201 goto out;
202 }
203
204 /* check 40 MHz support, if we have it */
179b8fc7 205 if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
6565ec9b
JB		 206 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
207 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
208 chandef->width = NL80211_CHAN_WIDTH_40;
209 chandef->center_freq1 += 10;
210 break;
211 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
212 chandef->width = NL80211_CHAN_WIDTH_40;
213 chandef->center_freq1 -= 10;
214 break;
215 }
216 } else {
217 /* 40 MHz (and 80 MHz) must be supported for VHT */
218 ret = IEEE80211_STA_DISABLE_VHT;
85220d71
JB		 219 /* also mark 40 MHz disabled */
220 ret |= IEEE80211_STA_DISABLE_40MHZ;
6565ec9b
JB		 221 goto out;
222 }
223
224 if (!vht_oper || !sband->vht_cap.vht_supported) {
225 ret = IEEE80211_STA_DISABLE_VHT;
226 goto out;
227 }
228
229 vht_chandef.chan = channel;
230 vht_chandef.center_freq1 =
231 ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx,
232 channel->band);
233 vht_chandef.center_freq2 = 0;
234
6565ec9b
JB		 235 switch (vht_oper->chan_width) {
236 case IEEE80211_VHT_CHANWIDTH_USE_HT:
237 vht_chandef.width = chandef->width;
cb664981 238 vht_chandef.center_freq1 = chandef->center_freq1;
6565ec9b
JB		 239 break;
240 case IEEE80211_VHT_CHANWIDTH_80MHZ:
241 vht_chandef.width = NL80211_CHAN_WIDTH_80;
242 break;
243 case IEEE80211_VHT_CHANWIDTH_160MHZ:
244 vht_chandef.width = NL80211_CHAN_WIDTH_160;
245 break;
246 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
247 vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
6553bf04
JB		 248 vht_chandef.center_freq2 =
249 ieee80211_channel_to_frequency(
250 vht_oper->center_freq_seg2_idx,
251 channel->band);
6565ec9b
JB		 252 break;
253 default:
5cdaed1e 254 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
30eb1dc2
JB		 255 sdata_info(sdata,
256 "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
257 vht_oper->chan_width);
6565ec9b
JB		 258 ret = IEEE80211_STA_DISABLE_VHT;
259 goto out;
260 }
261
262 if (!cfg80211_chandef_valid(&vht_chandef)) {
5cdaed1e 263 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
30eb1dc2
JB		 264 sdata_info(sdata,
265 "AP VHT information is invalid, disable VHT\n");
6565ec9b
JB		 266 ret = IEEE80211_STA_DISABLE_VHT;
267 goto out;
268 }
269
270 if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
271 ret = 0;
272 goto out;
273 }
274
275 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
5cdaed1e 276 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
30eb1dc2
JB		 277 sdata_info(sdata,
278 "AP VHT information doesn't match HT, disable VHT\n");
6565ec9b
JB		 279 ret = IEEE80211_STA_DISABLE_VHT;
280 goto out;
281 }
282
283 *chandef = vht_chandef;
284
285 ret = 0;
286
287out:
963a1852
JB		 288 /*
289 * When tracking the current AP, don't do any further checks if the
290 * new chandef is identical to the one we're currently using for the
291 * connection. This keeps us from playing ping-pong with regulatory,
292 * without it the following can happen (for example):
293 * - connect to an AP with 80 MHz, world regdom allows 80 MHz
294 * - AP advertises regdom US
295 * - CRDA loads regdom US with 80 MHz prohibited (old database)
296 * - the code below detects an unsupported channel, downgrades, and
297 * we disconnect from the AP in the caller
298 * - disconnect causes CRDA to reload world regdomain and the game
299 * starts anew.
300 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
301 *
302 * It seems possible that there are still scenarios with CSA or real
303 * bandwidth changes where a this could happen, but those cases are
304 * less common and wouldn't completely prevent using the AP.
305 */
306 if (tracking &&
307 cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef))
308 return ret;
309
586e01ed
JB		 310 /* don't print the message below for VHT mismatch if VHT is disabled */
311 if (ret & IEEE80211_STA_DISABLE_VHT)
312 vht_chandef = *chandef;
313
ddfe49b4
JB		 314 /*
315 * Ignore the DISABLED flag when we're already connected and only
316 * tracking the APs beacon for bandwidth changes - otherwise we
317 * might get disconnected here if we connect to an AP, update our
318 * regulatory information based on the AP's country IE and the
319 * information we have is wrong/outdated and disables the channel
320 * that we're actually using for the connection to the AP.
321 */
6565ec9b 322 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
ddfe49b4
JB		 323 tracking ? 0 :
324 IEEE80211_CHAN_DISABLED)) {
6565ec9b
JB		 325 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
326 ret = IEEE80211_STA_DISABLE_HT |
327 IEEE80211_STA_DISABLE_VHT;
b56e4b85 328 break;
6565ec9b
JB		 329 }
330
e6b7cde4 331 ret |= ieee80211_chandef_downgrade(chandef);
6565ec9b
JB		 332 }
333
5cdaed1e 334 if (chandef->width != vht_chandef.width && !tracking)
6565ec9b
JB		 335 sdata_info(sdata,
336 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
337
338 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
339 return ret;
340}
341
30eb1dc2
JB		 342static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
343 struct sta_info *sta,
53b954ee 344 const struct ieee80211_ht_cap *ht_cap,
30eb1dc2
JB		 345 const struct ieee80211_ht_operation *ht_oper,
346 const struct ieee80211_vht_operation *vht_oper,
347 const u8 *bssid, u32 *changed)
d5522e03
JB		 348{
349 struct ieee80211_local *local = sdata->local;
30eb1dc2 350 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d5522e03 351 struct ieee80211_supported_band *sband;
55de908a 352 struct ieee80211_channel *chan;
30eb1dc2 353 struct cfg80211_chan_def chandef;
9ed6bcce 354 u16 ht_opmode;
30eb1dc2
JB		 355 u32 flags;
356 enum ieee80211_sta_rx_bandwidth new_sta_bw;
357 int ret;
d5522e03 358
30eb1dc2
JB		 359 /* if HT was/is disabled, don't track any bandwidth changes */
360 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
1128958d
JB		 361 return 0;
362
30eb1dc2
JB		 363 /* don't check VHT if we associated as non-VHT station */
364 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
365 vht_oper = NULL;
366
367 if (WARN_ON_ONCE(!sta))
368 return -EINVAL;
369
017b45bb
AA		 370 /*
371 * if bss configuration changed store the new one -
372 * this may be applicable even if channel is identical
373 */
374 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
375 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
376 *changed |= BSS_CHANGED_HT;
377 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
378 }
379
f2d9330e 380 chan = sdata->vif.bss_conf.chandef.chan;
55de908a 381 sband = local->hw.wiphy->bands[chan->band];
d5522e03 382
30eb1dc2 383 /* calculate new channel (type) based on HT/VHT operation IEs */
53b954ee
EP		 384 flags = ieee80211_determine_chantype(sdata, sband, chan,
385 ht_cap, ht_oper, vht_oper,
386 &chandef, true);
30eb1dc2
JB		 387
388 /*
389 * Downgrade the new channel if we associated with restricted
390 * capabilities. For example, if we associated as a 20 MHz STA
391 * to a 40 MHz AP (due to regulatory, capabilities or config
392 * reasons) then switching to a 40 MHz channel now won't do us
393 * any good -- we couldn't use it with the AP.
394 */
395 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
396 chandef.width == NL80211_CHAN_WIDTH_80P80)
e6b7cde4 397 flags |= ieee80211_chandef_downgrade(&chandef);
30eb1dc2
JB		 398 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
399 chandef.width == NL80211_CHAN_WIDTH_160)
e6b7cde4 400 flags |= ieee80211_chandef_downgrade(&chandef);
30eb1dc2
JB		 401 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
402 chandef.width > NL80211_CHAN_WIDTH_20)
e6b7cde4 403 flags |= ieee80211_chandef_downgrade(&chandef);
30eb1dc2
JB		 404
405 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
406 return 0;
407
408 sdata_info(sdata,
409 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
410 ifmgd->bssid, chandef.chan->center_freq, chandef.width,
411 chandef.center_freq1, chandef.center_freq2);
412
413 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
414 IEEE80211_STA_DISABLE_VHT |
415 IEEE80211_STA_DISABLE_40MHZ |
416 IEEE80211_STA_DISABLE_80P80MHZ |
417 IEEE80211_STA_DISABLE_160MHZ)) ||
418 !cfg80211_chandef_valid(&chandef)) {
419 sdata_info(sdata,
420 "AP %pM changed bandwidth in a way we can't support - disconnect\n",
421 ifmgd->bssid);
422 return -EINVAL;
423 }
424
425 switch (chandef.width) {
426 case NL80211_CHAN_WIDTH_20_NOHT:
427 case NL80211_CHAN_WIDTH_20:
428 new_sta_bw = IEEE80211_STA_RX_BW_20;
429 break;
4bf88530 430 case NL80211_CHAN_WIDTH_40:
30eb1dc2 431 new_sta_bw = IEEE80211_STA_RX_BW_40;
64f68e5d 432 break;
30eb1dc2
JB		 433 case NL80211_CHAN_WIDTH_80:
434 new_sta_bw = IEEE80211_STA_RX_BW_80;
435 break;
436 case NL80211_CHAN_WIDTH_80P80:
437 case NL80211_CHAN_WIDTH_160:
438 new_sta_bw = IEEE80211_STA_RX_BW_160;
64f68e5d 439 break;
30eb1dc2
JB		 440 default:
441 return -EINVAL;
64f68e5d 442 }
d5522e03 443
30eb1dc2
JB		 444 if (new_sta_bw > sta->cur_max_bandwidth)
445 new_sta_bw = sta->cur_max_bandwidth;
64f68e5d 446
30eb1dc2
JB		 447 if (new_sta_bw < sta->sta.bandwidth) {
448 sta->sta.bandwidth = new_sta_bw;
449 rate_control_rate_update(local, sband, sta,
450 IEEE80211_RC_BW_CHANGED);
451 }
64f68e5d 452
30eb1dc2
JB		 453 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
454 if (ret) {
455 sdata_info(sdata,
456 "AP %pM changed bandwidth to incompatible one - disconnect\n",
457 ifmgd->bssid);
458 return ret;
459 }
7cc44ed4 460
30eb1dc2
JB		 461 if (new_sta_bw > sta->sta.bandwidth) {
462 sta->sta.bandwidth = new_sta_bw;
463 rate_control_rate_update(local, sband, sta,
464 IEEE80211_RC_BW_CHANGED);
0aaffa9b 465 }
d5522e03 466
30eb1dc2 467 return 0;
d5522e03
JB		 468}
469
9c6bd790
JB		 470/* frame sending functions */
471
66e67e41 472static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
9dde6423 473 struct sk_buff *skb, u8 ap_ht_param,
66e67e41
JB		 474 struct ieee80211_supported_band *sband,
475 struct ieee80211_channel *channel,
476 enum ieee80211_smps_mode smps)
477{
66e67e41
JB		 478 u8 *pos;
479 u32 flags = channel->flags;
480 u16 cap;
481 struct ieee80211_sta_ht_cap ht_cap;
482
483 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
484
66e67e41
JB		 485 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
486 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
487
66e67e41
JB		 488 /* determine capability flags */
489 cap = ht_cap.cap;
490
9dde6423 491 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
66e67e41
JB		 492 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
493 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
494 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
495 cap &= ~IEEE80211_HT_CAP_SGI_40;
496 }
497 break;
498 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
499 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
500 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
501 cap &= ~IEEE80211_HT_CAP_SGI_40;
502 }
503 break;
504 }
505
24398e39
JB		 506 /*
507 * If 40 MHz was disabled associate as though we weren't
508 * capable of 40 MHz -- some broken APs will never fall
509 * back to trying to transmit in 20 MHz.
510 */
511 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
512 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
513 cap &= ~IEEE80211_HT_CAP_SGI_40;
514 }
515
66e67e41
JB		 516 /* set SM PS mode properly */
517 cap &= ~IEEE80211_HT_CAP_SM_PS;
518 switch (smps) {
519 case IEEE80211_SMPS_AUTOMATIC:
520 case IEEE80211_SMPS_NUM_MODES:
521 WARN_ON(1);
522 case IEEE80211_SMPS_OFF:
523 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
524 IEEE80211_HT_CAP_SM_PS_SHIFT;
525 break;
526 case IEEE80211_SMPS_STATIC:
527 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
528 IEEE80211_HT_CAP_SM_PS_SHIFT;
529 break;
530 case IEEE80211_SMPS_DYNAMIC:
531 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
532 IEEE80211_HT_CAP_SM_PS_SHIFT;
533 break;
534 }
535
536 /* reserve and fill IE */
537 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
538 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
539}
540
d545daba
MP		 541static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
542 struct sk_buff *skb,
b08fbbd8
JB		 543 struct ieee80211_supported_band *sband,
544 struct ieee80211_vht_cap *ap_vht_cap)
d545daba
MP		 545{
546 u8 *pos;
547 u32 cap;
548 struct ieee80211_sta_vht_cap vht_cap;
c1cf6d4e 549 u32 mask, ap_bf_sts, our_bf_sts;
d545daba
MP		 550
551 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
552
553 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
dd5ecfea 554 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
d545daba
MP		 555
556 /* determine capability flags */
557 cap = vht_cap.cap;
558
f2d9d270 559 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
575f0530
JB		 560 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
561
562 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
563 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ ||
564 bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
565 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
f2d9d270
JB		 566 }
567
568 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
569 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
575f0530 570 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
f2d9d270
JB		 571 }
572
b08fbbd8
JB		 573 /*
574 * Some APs apparently get confused if our capabilities are better
575 * than theirs, so restrict what we advertise in the assoc request.
576 */
577 if (!(ap_vht_cap->vht_cap_info &
578 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
579 cap &= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE;
580
c1cf6d4e
ES		 581 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK;
582
583 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask;
584 our_bf_sts = cap & mask;
585
586 if (ap_bf_sts < our_bf_sts) {
587 cap &= ~mask;
588 cap |= ap_bf_sts;
589 }
590
d545daba 591 /* reserve and fill IE */
d4950281 592 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
d545daba
MP		 593 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
594}
595
66e67e41
JB		 596static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
597{
598 struct ieee80211_local *local = sdata->local;
599 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
600 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
601 struct sk_buff *skb;
602 struct ieee80211_mgmt *mgmt;
603 u8 *pos, qos_info;
604 size_t offset = 0, noffset;
2103dec1 605 int i, count, rates_len, supp_rates_len, shift;
66e67e41
JB		 606 u16 capab;
607 struct ieee80211_supported_band *sband;
55de908a
JB		 608 struct ieee80211_chanctx_conf *chanctx_conf;
609 struct ieee80211_channel *chan;
2103dec1 610 u32 rate_flags, rates = 0;
66e67e41 611
8d61ffa5 612 sdata_assert_lock(sdata);
66e67e41 613
55de908a
JB		 614 rcu_read_lock();
615 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
616 if (WARN_ON(!chanctx_conf)) {
617 rcu_read_unlock();
618 return;
619 }
4bf88530 620 chan = chanctx_conf->def.chan;
2103dec1 621 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
55de908a
JB		 622 rcu_read_unlock();
623 sband = local->hw.wiphy->bands[chan->band];
2103dec1 624 shift = ieee80211_vif_get_shift(&sdata->vif);
66e67e41
JB		 625
626 if (assoc_data->supp_rates_len) {
627 /*
628 * Get all rates supported by the device and the AP as
629 * some APs don't like getting a superset of their rates
630 * in the association request (e.g. D-Link DAP 1353 in
631 * b-only mode)...
632 */
2103dec1
SW		 633 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
634 assoc_data->supp_rates,
635 assoc_data->supp_rates_len,
636 &rates);
66e67e41
JB		 637 } else {
638 /*
639 * In case AP not provide any supported rates information
640 * before association, we send information element(s) with
641 * all rates that we support.
642 */
2103dec1
SW		 643 rates_len = 0;
644 for (i = 0; i < sband->n_bitrates; i++) {
645 if ((rate_flags & sband->bitrates[i].flags)
646 != rate_flags)
647 continue;
648 rates |= BIT(i);
649 rates_len++;
650 }
66e67e41
JB		 651 }
652
653 skb = alloc_skb(local->hw.extra_tx_headroom +
654 sizeof(*mgmt) + /* bit too much but doesn't matter */
655 2 + assoc_data->ssid_len + /* SSID */
656 4 + rates_len + /* (extended) rates */
657 4 + /* power capability */
658 2 + 2 * sband->n_channels + /* supported channels */
659 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
d4950281 660 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
66e67e41
JB		 661 assoc_data->ie_len + /* extra IEs */
662 9, /* WMM */
663 GFP_KERNEL);
664 if (!skb)
665 return;
666
667 skb_reserve(skb, local->hw.extra_tx_headroom);
668
669 capab = WLAN_CAPABILITY_ESS;
670
671 if (sband->band == IEEE80211_BAND_2GHZ) {
ea1b2b45
JB		 672 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
673 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
66e67e41
JB		 674 }
675
676 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
677 capab |= WLAN_CAPABILITY_PRIVACY;
678
679 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
30686bf7 680 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT))
66e67e41
JB		 681 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
682
cd2f5dd7
AK		 683 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM)
684 capab |= WLAN_CAPABILITY_RADIO_MEASURE;
685
66e67e41
JB		 686 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
687 memset(mgmt, 0, 24);
688 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
689 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
690 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
691
692 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
693 skb_put(skb, 10);
694 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
695 IEEE80211_STYPE_REASSOC_REQ);
696 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
697 mgmt->u.reassoc_req.listen_interval =
698 cpu_to_le16(local->hw.conf.listen_interval);
699 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
700 ETH_ALEN);
701 } else {
702 skb_put(skb, 4);
703 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
704 IEEE80211_STYPE_ASSOC_REQ);
705 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
706 mgmt->u.assoc_req.listen_interval =
707 cpu_to_le16(local->hw.conf.listen_interval);
708 }
709
710 /* SSID */
711 pos = skb_put(skb, 2 + assoc_data->ssid_len);
712 *pos++ = WLAN_EID_SSID;
713 *pos++ = assoc_data->ssid_len;
714 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
715
716 /* add all rates which were marked to be used above */
717 supp_rates_len = rates_len;
718 if (supp_rates_len > 8)
719 supp_rates_len = 8;
720
721 pos = skb_put(skb, supp_rates_len + 2);
722 *pos++ = WLAN_EID_SUPP_RATES;
723 *pos++ = supp_rates_len;
724
725 count = 0;
726 for (i = 0; i < sband->n_bitrates; i++) {
727 if (BIT(i) & rates) {
2103dec1
SW		 728 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
729 5 * (1 << shift));
730 *pos++ = (u8) rate;
66e67e41
JB		 731 if (++count == 8)
732 break;
733 }
734 }
735
736 if (rates_len > count) {
737 pos = skb_put(skb, rates_len - count + 2);
738 *pos++ = WLAN_EID_EXT_SUPP_RATES;
739 *pos++ = rates_len - count;
740
741 for (i++; i < sband->n_bitrates; i++) {
742 if (BIT(i) & rates) {
2103dec1
SW		 743 int rate;
744 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
745 5 * (1 << shift));
746 *pos++ = (u8) rate;
66e67e41
JB		 747 }
748 }
749 }
750
cd2f5dd7
AK		 751 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT ||
752 capab & WLAN_CAPABILITY_RADIO_MEASURE) {
66e67e41
JB		 753 pos = skb_put(skb, 4);
754 *pos++ = WLAN_EID_PWR_CAPABILITY;
755 *pos++ = 2;
756 *pos++ = 0; /* min tx power */
0430c883
SW		 757 /* max tx power */
758 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
cd2f5dd7 759 }
66e67e41 760
cd2f5dd7 761 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
66e67e41
JB		 762 /* TODO: get this in reg domain format */
763 pos = skb_put(skb, 2 * sband->n_channels + 2);
764 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
765 *pos++ = 2 * sband->n_channels;
766 for (i = 0; i < sband->n_channels; i++) {
767 *pos++ = ieee80211_frequency_to_channel(
768 sband->channels[i].center_freq);
769 *pos++ = 1; /* one channel in the subband*/
770 }
771 }
772
773 /* if present, add any custom IEs that go before HT */
b3f51e94 774 if (assoc_data->ie_len) {
66e67e41
JB		 775 static const u8 before_ht[] = {
776 WLAN_EID_SSID,
777 WLAN_EID_SUPP_RATES,
778 WLAN_EID_EXT_SUPP_RATES,
779 WLAN_EID_PWR_CAPABILITY,
780 WLAN_EID_SUPPORTED_CHANNELS,
781 WLAN_EID_RSN,
782 WLAN_EID_QOS_CAPA,
783 WLAN_EID_RRM_ENABLED_CAPABILITIES,
784 WLAN_EID_MOBILITY_DOMAIN,
8ed28747
JB		 785 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */
786 WLAN_EID_RIC_DATA, /* reassoc only */
66e67e41
JB		 787 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
788 };
8ed28747
JB		 789 static const u8 after_ric[] = {
790 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
791 WLAN_EID_HT_CAPABILITY,
792 WLAN_EID_BSS_COEX_2040,
793 WLAN_EID_EXT_CAPABILITY,
794 WLAN_EID_QOS_TRAFFIC_CAPA,
795 WLAN_EID_TIM_BCAST_REQ,
796 WLAN_EID_INTERWORKING,
797 /* 60GHz doesn't happen right now */
798 WLAN_EID_VHT_CAPABILITY,
799 WLAN_EID_OPMODE_NOTIF,
800 };
801
802 noffset = ieee80211_ie_split_ric(assoc_data->ie,
803 assoc_data->ie_len,
804 before_ht,
805 ARRAY_SIZE(before_ht),
806 after_ric,
807 ARRAY_SIZE(after_ric),
808 offset);
66e67e41
JB		 809 pos = skb_put(skb, noffset - offset);
810 memcpy(pos, assoc_data->ie + offset, noffset - offset);
811 offset = noffset;
812 }
813
f2d9d270
JB		 814 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
815 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
816 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
817
a8243b72 818 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
9dde6423 819 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
04ecd257 820 sband, chan, sdata->smps_mode);
66e67e41 821
3de3802c
JB		 822 /* if present, add any custom IEs that go before VHT */
823 if (assoc_data->ie_len) {
824 static const u8 before_vht[] = {
825 WLAN_EID_SSID,
826 WLAN_EID_SUPP_RATES,
827 WLAN_EID_EXT_SUPP_RATES,
828 WLAN_EID_PWR_CAPABILITY,
829 WLAN_EID_SUPPORTED_CHANNELS,
830 WLAN_EID_RSN,
831 WLAN_EID_QOS_CAPA,
832 WLAN_EID_RRM_ENABLED_CAPABILITIES,
833 WLAN_EID_MOBILITY_DOMAIN,
834 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
835 WLAN_EID_HT_CAPABILITY,
836 WLAN_EID_BSS_COEX_2040,
837 WLAN_EID_EXT_CAPABILITY,
838 WLAN_EID_QOS_TRAFFIC_CAPA,
839 WLAN_EID_TIM_BCAST_REQ,
840 WLAN_EID_INTERWORKING,
841 };
8ed28747
JB		 842
843 /* RIC already taken above, so no need to handle here anymore */
3de3802c
JB		 844 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
845 before_vht, ARRAY_SIZE(before_vht),
846 offset);
847 pos = skb_put(skb, noffset - offset);
848 memcpy(pos, assoc_data->ie + offset, noffset - offset);
849 offset = noffset;
850 }
851
d545daba 852 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
b08fbbd8
JB		 853 ieee80211_add_vht_ie(sdata, skb, sband,
854 &assoc_data->ap_vht_cap);
d545daba 855
66e67e41 856 /* if present, add any custom non-vendor IEs that go after HT */
b3f51e94 857 if (assoc_data->ie_len) {
66e67e41
JB		 858 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
859 assoc_data->ie_len,
860 offset);
861 pos = skb_put(skb, noffset - offset);
862 memcpy(pos, assoc_data->ie + offset, noffset - offset);
863 offset = noffset;
864 }
865
76f0303d
JB		 866 if (assoc_data->wmm) {
867 if (assoc_data->uapsd) {
dc41e4d4
EP		 868 qos_info = ifmgd->uapsd_queues;
869 qos_info |= (ifmgd->uapsd_max_sp_len <<
66e67e41
JB		 870 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
871 } else {
872 qos_info = 0;
873 }
874
40b861a0 875 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
66e67e41
JB		 876 }
877
878 /* add any remaining custom (i.e. vendor specific here) IEs */
b3f51e94 879 if (assoc_data->ie_len) {
66e67e41
JB		 880 noffset = assoc_data->ie_len;
881 pos = skb_put(skb, noffset - offset);
882 memcpy(pos, assoc_data->ie + offset, noffset - offset);
883 }
884
a1845fc7
JB		 885 drv_mgd_prepare_tx(local, sdata);
886
66e67e41 887 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
30686bf7 888 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1672c0e3
JB		 889 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
890 IEEE80211_TX_INTFL_MLME_CONN_TX;
66e67e41
JB		 891 ieee80211_tx_skb(sdata, skb);
892}
893
572e0012
KV		 894void ieee80211_send_pspoll(struct ieee80211_local *local,
895 struct ieee80211_sub_if_data *sdata)
896{
572e0012
KV		 897 struct ieee80211_pspoll *pspoll;
898 struct sk_buff *skb;
572e0012 899
d8cd189e
KV		 900 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
901 if (!skb)
572e0012 902 return;
572e0012 903
d8cd189e
KV		 904 pspoll = (struct ieee80211_pspoll *) skb->data;
905 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
572e0012 906
62ae67be
JB		 907 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
908 ieee80211_tx_skb(sdata, skb);
572e0012
KV		 909}
910
965bedad
JB		 911void ieee80211_send_nullfunc(struct ieee80211_local *local,
912 struct ieee80211_sub_if_data *sdata,
913 int powersave)
914{
915 struct sk_buff *skb;
d8cd189e 916 struct ieee80211_hdr_3addr *nullfunc;
b6f35301 917 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
965bedad 918
d8cd189e
KV		 919 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
920 if (!skb)
965bedad 921 return;
965bedad 922
d8cd189e 923 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
965bedad 924 if (powersave)
d8cd189e 925 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
965bedad 926
6c17b77b
SF		 927 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
928 IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
ff40b425 929
30686bf7 930 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
ff40b425
PF		 931 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
932
392b9ffb 933 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
b6f35301
RM		 934 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
935
62ae67be 936 ieee80211_tx_skb(sdata, skb);
965bedad
JB		 937}
938
d524215f
FF		 939static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
940 struct ieee80211_sub_if_data *sdata)
941{
942 struct sk_buff *skb;
943 struct ieee80211_hdr *nullfunc;
944 __le16 fc;
945
946 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
947 return;
948
949 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
d15b8459 950 if (!skb)
d524215f 951 return;
d15b8459 952
d524215f
FF		 953 skb_reserve(skb, local->hw.extra_tx_headroom);
954
955 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
956 memset(nullfunc, 0, 30);
957 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
958 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
959 nullfunc->frame_control = fc;
960 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
961 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
962 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
963 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
964
965 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
966 ieee80211_tx_skb(sdata, skb);
967}
968
cc32abd4
JB		 969/* spectrum management related things */
970static void ieee80211_chswitch_work(struct work_struct *work)
971{
972 struct ieee80211_sub_if_data *sdata =
973 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
675a0b04 974 struct ieee80211_local *local = sdata->local;
cc32abd4 975 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
7578d575 976 int ret;
cc32abd4 977
9607e6b6 978 if (!ieee80211_sdata_running(sdata))
cc32abd4
JB		 979 return;
980
8d61ffa5 981 sdata_lock(sdata);
4c3ebc56
MK		 982 mutex_lock(&local->mtx);
983 mutex_lock(&local->chanctx_mtx);
984
77fdaa12
JB		 985 if (!ifmgd->associated)
986 goto out;
cc32abd4 987
4c3ebc56
MK		 988 if (!sdata->vif.csa_active)
989 goto out;
990
991 /*
992 * using reservation isn't immediate as it may be deferred until later
993 * with multi-vif. once reservation is complete it will re-schedule the
994 * work with no reserved_chanctx so verify chandef to check if it
995 * completed successfully
996 */
997
998 if (sdata->reserved_chanctx) {
999 /*
1000 * with multi-vif csa driver may call ieee80211_csa_finish()
1001 * many times while waiting for other interfaces to use their
1002 * reservations
1003 */
1004 if (sdata->reserved_ready)
1005 goto out;
1006
1007 ret = ieee80211_vif_use_reserved_context(sdata);
1008 if (ret) {
1009 sdata_info(sdata,
1010 "failed to use reserved channel context, disconnecting (err=%d)\n",
1011 ret);
1012 ieee80211_queue_work(&sdata->local->hw,
1013 &ifmgd->csa_connection_drop_work);
1014 goto out;
1015 }
1016
1017 goto out;
1018 }
1019
1020 if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
1021 &sdata->csa_chandef)) {
7578d575 1022 sdata_info(sdata,
4c3ebc56 1023 "failed to finalize channel switch, disconnecting\n");
7578d575
AN		 1024 ieee80211_queue_work(&sdata->local->hw,
1025 &ifmgd->csa_connection_drop_work);
1026 goto out;
1027 }
675a0b04 1028
cc32abd4 1029 /* XXX: shouldn't really modify cfg80211-owned data! */
33787fc4 1030 ifmgd->associated->channel = sdata->csa_chandef.chan;
cc32abd4 1031
0c21e632
LC		 1032 ifmgd->csa_waiting_bcn = true;
1033
1034 ieee80211_sta_reset_beacon_monitor(sdata);
1035 ieee80211_sta_reset_conn_monitor(sdata);
1036
1037out:
1038 mutex_unlock(&local->chanctx_mtx);
1039 mutex_unlock(&local->mtx);
1040 sdata_unlock(sdata);
1041}
1042
1043static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata)
1044{
1045 struct ieee80211_local *local = sdata->local;
1046 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1047 int ret;
1048
1049 sdata_assert_lock(sdata);
1050
1051 WARN_ON(!sdata->vif.csa_active);
4c3ebc56 1052
a46992b4
LC		 1053 if (sdata->csa_block_tx) {
1054 ieee80211_wake_vif_queues(local, sdata,
1055 IEEE80211_QUEUE_STOP_REASON_CSA);
1056 sdata->csa_block_tx = false;
1057 }
7578d575 1058
0c21e632
LC		 1059 sdata->vif.csa_active = false;
1060 ifmgd->csa_waiting_bcn = false;
1061
f1d65583
LC		 1062 ret = drv_post_channel_switch(sdata);
1063 if (ret) {
1064 sdata_info(sdata,
1065 "driver post channel switch failed, disconnecting\n");
1066 ieee80211_queue_work(&local->hw,
1067 &ifmgd->csa_connection_drop_work);
0c21e632 1068 return;
f1d65583 1069 }
688b1ecf
LC		 1070
1071 cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef);
cc32abd4
JB		 1072}
1073
5ce6e438
JB		 1074void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1075{
55de908a
JB		 1076 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1077 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5ce6e438
JB		 1078
1079 trace_api_chswitch_done(sdata, success);
1080 if (!success) {
882a7c69
JB		 1081 sdata_info(sdata,
1082 "driver channel switch failed, disconnecting\n");
1083 ieee80211_queue_work(&sdata->local->hw,
1084 &ifmgd->csa_connection_drop_work);
1085 } else {
1086 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
5ce6e438 1087 }
5ce6e438
JB		 1088}
1089EXPORT_SYMBOL(ieee80211_chswitch_done);
1090
cc32abd4
JB		 1091static void ieee80211_chswitch_timer(unsigned long data)
1092{
1093 struct ieee80211_sub_if_data *sdata =
1094 (struct ieee80211_sub_if_data *) data;
5bb644a0 1095
9b7d72c1 1096 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
cc32abd4
JB		 1097}
1098
37799e52 1099static void
4a3cb702 1100ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
2ba45384
LC		 1101 u64 timestamp, u32 device_timestamp,
1102 struct ieee802_11_elems *elems,
04a161f4 1103 bool beacon)
cc32abd4 1104{
b4f286a1 1105 struct ieee80211_local *local = sdata->local;
cc32abd4 1106 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
37799e52 1107 struct cfg80211_bss *cbss = ifmgd->associated;
4c3ebc56 1108 struct ieee80211_chanctx_conf *conf;
55de908a 1109 struct ieee80211_chanctx *chanctx;
e6b7cde4 1110 enum ieee80211_band current_band;
c0f17eb9 1111 struct ieee80211_csa_ie csa_ie;
6d027bcc 1112 struct ieee80211_channel_switch ch_switch;
e6b7cde4 1113 int res;
cc32abd4 1114
8d61ffa5 1115 sdata_assert_lock(sdata);
77fdaa12 1116
37799e52 1117 if (!cbss)
cc32abd4
JB		 1118 return;
1119
b4f286a1 1120 if (local->scanning)
cc32abd4
JB		 1121 return;
1122
37799e52 1123 /* disregard subsequent announcements if we are already processing */
3e2a0226 1124 if (sdata->vif.csa_active)
cc32abd4
JB		 1125 return;
1126
e6b7cde4 1127 current_band = cbss->channel->band;
c0f17eb9 1128 memset(&csa_ie, 0, sizeof(csa_ie));
84469a45 1129 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band,
e6b7cde4 1130 ifmgd->flags,
c0f17eb9 1131 ifmgd->associated->bssid, &csa_ie);
e6b7cde4 1132 if (res < 0)
b4f286a1 1133 ieee80211_queue_work(&local->hw,
882a7c69 1134 &ifmgd->csa_connection_drop_work);
e6b7cde4 1135 if (res)
cc32abd4 1136 return;
cd64f2a9 1137
c0f17eb9 1138 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
85220d71
JB		 1139 IEEE80211_CHAN_DISABLED)) {
1140 sdata_info(sdata,
1141 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
e6b7cde4 1142 ifmgd->associated->bssid,
c0f17eb9
CYY		 1143 csa_ie.chandef.chan->center_freq,
1144 csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1145 csa_ie.chandef.center_freq2);
85220d71
JB		 1146 ieee80211_queue_work(&local->hw,
1147 &ifmgd->csa_connection_drop_work);
1148 return;
1149 }
1150
f84eaa10
JB		 1151 if (cfg80211_chandef_identical(&csa_ie.chandef,
1152 &sdata->vif.bss_conf.chandef)) {
1153 if (ifmgd->csa_ignored_same_chan)
1154 return;
1155 sdata_info(sdata,
1156 "AP %pM tries to chanswitch to same channel, ignore\n",
1157 ifmgd->associated->bssid);
1158 ifmgd->csa_ignored_same_chan = true;
1159 return;
1160 }
1161
c5a71688
AN		 1162 /*
1163 * Drop all TDLS peers - either we disconnect or move to a different
1164 * channel from this point on. There's no telling what our peer will do.
1165 * The TDLS WIDER_BW scenario is also problematic, as peers might now
1166 * have an incompatible wider chandef.
1167 */
1168 ieee80211_teardown_tdls_peers(sdata);
1169
4c3ebc56 1170 mutex_lock(&local->mtx);
7578d575 1171 mutex_lock(&local->chanctx_mtx);
4c3ebc56
MK		 1172 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1173 lockdep_is_held(&local->chanctx_mtx));
1174 if (!conf) {
1175 sdata_info(sdata,
1176 "no channel context assigned to vif?, disconnecting\n");
f3b0bbb3 1177 goto drop_connection;
4c3ebc56
MK		 1178 }
1179
1180 chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1181
0f791eb4 1182 if (local->use_chanctx &&
30686bf7 1183 !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) {
0f791eb4
LC		 1184 sdata_info(sdata,
1185 "driver doesn't support chan-switch with channel contexts\n");
f3b0bbb3 1186 goto drop_connection;
55de908a
JB		 1187 }
1188
6d027bcc
LC		 1189 ch_switch.timestamp = timestamp;
1190 ch_switch.device_timestamp = device_timestamp;
1191 ch_switch.block_tx = csa_ie.mode;
1192 ch_switch.chandef = csa_ie.chandef;
1193 ch_switch.count = csa_ie.count;
1194
1195 if (drv_pre_channel_switch(sdata, &ch_switch)) {
1196 sdata_info(sdata,
1197 "preparing for channel switch failed, disconnecting\n");
f3b0bbb3 1198 goto drop_connection;
6d027bcc
LC		 1199 }
1200
4c3ebc56
MK		 1201 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1202 chanctx->mode, false);
1203 if (res) {
55de908a 1204 sdata_info(sdata,
4c3ebc56
MK		 1205 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1206 res);
f3b0bbb3 1207 goto drop_connection;
55de908a 1208 }
b4f286a1 1209 mutex_unlock(&local->chanctx_mtx);
55de908a 1210
c46a73f3 1211 sdata->vif.csa_active = true;
4c3ebc56 1212 sdata->csa_chandef = csa_ie.chandef;
59af6928 1213 sdata->csa_block_tx = csa_ie.mode;
f84eaa10 1214 ifmgd->csa_ignored_same_chan = false;
55de908a 1215
59af6928 1216 if (sdata->csa_block_tx)
a46992b4
LC		 1217 ieee80211_stop_vif_queues(local, sdata,
1218 IEEE80211_QUEUE_STOP_REASON_CSA);
59af6928 1219 mutex_unlock(&local->mtx);
57eebdf3 1220
2f457293
LC		 1221 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef,
1222 csa_ie.count);
1223
b4f286a1 1224 if (local->ops->channel_switch) {
5ce6e438 1225 /* use driver's channel switch callback */
0f791eb4 1226 drv_channel_switch(local, sdata, &ch_switch);
5ce6e438
JB		 1227 return;
1228 }
1229
1230 /* channel switch handled in software */
c0f17eb9 1231 if (csa_ie.count <= 1)
b4f286a1 1232 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
57eebdf3 1233 else
cc32abd4 1234 mod_timer(&ifmgd->chswitch_timer,
ff1e417c
LC		 1235 TU_TO_EXP_TIME((csa_ie.count - 1) *
1236 cbss->beacon_interval));
f3b0bbb3
JB		 1237 return;
1238 drop_connection:
1239 ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work);
1240 mutex_unlock(&local->chanctx_mtx);
1241 mutex_unlock(&local->mtx);
cc32abd4
JB		 1242}
1243
24a4e400
SG		 1244static bool
1245ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1246 struct ieee80211_channel *channel,
1247 const u8 *country_ie, u8 country_ie_len,
1248 const u8 *pwr_constr_elem,
1249 int *chan_pwr, int *pwr_reduction)
cc32abd4 1250{
04b7b2ff
JB		 1251 struct ieee80211_country_ie_triplet *triplet;
1252 int chan = ieee80211_frequency_to_channel(channel->center_freq);
24a4e400 1253 int i, chan_increment;
04b7b2ff 1254 bool have_chan_pwr = false;
cc32abd4 1255
04b7b2ff
JB		 1256 /* Invalid IE */
1257 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
24a4e400 1258 return false;
cc32abd4 1259
04b7b2ff
JB		 1260 triplet = (void *)(country_ie + 3);
1261 country_ie_len -= 3;
1262
1263 switch (channel->band) {
1264 default:
1265 WARN_ON_ONCE(1);
1266 /* fall through */
1267 case IEEE80211_BAND_2GHZ:
1268 case IEEE80211_BAND_60GHZ:
1269 chan_increment = 1;
1270 break;
1271 case IEEE80211_BAND_5GHZ:
1272 chan_increment = 4;
1273 break;
cc32abd4 1274 }
04b7b2ff
JB		 1275
1276 /* find channel */
1277 while (country_ie_len >= 3) {
1278 u8 first_channel = triplet->chans.first_channel;
1279
1280 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1281 goto next;
1282
1283 for (i = 0; i < triplet->chans.num_channels; i++) {
1284 if (first_channel + i * chan_increment == chan) {
1285 have_chan_pwr = true;
24a4e400 1286 *chan_pwr = triplet->chans.max_power;
04b7b2ff
JB		 1287 break;
1288 }
1289 }
1290 if (have_chan_pwr)
1291 break;
1292
1293 next:
1294 triplet++;
1295 country_ie_len -= 3;
1296 }
1297
a5fee9cb 1298 if (have_chan_pwr && pwr_constr_elem)
24a4e400 1299 *pwr_reduction = *pwr_constr_elem;
a5fee9cb
MB		 1300 else
1301 *pwr_reduction = 0;
1302
24a4e400
SG		 1303 return have_chan_pwr;
1304}
1305
c8d65917
SG		 1306static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
1307 struct ieee80211_channel *channel,
1308 const u8 *cisco_dtpc_ie,
1309 int *pwr_level)
1310{
1311 /* From practical testing, the first data byte of the DTPC element
1312 * seems to contain the requested dBm level, and the CLI on Cisco
1313 * APs clearly state the range is -127 to 127 dBm, which indicates
1314 * a signed byte, although it seemingly never actually goes negative.
1315 * The other byte seems to always be zero.
1316 */
1317 *pwr_level = (__s8)cisco_dtpc_ie[4];
1318}
1319
24a4e400
SG		 1320static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1321 struct ieee80211_channel *channel,
1322 struct ieee80211_mgmt *mgmt,
1323 const u8 *country_ie, u8 country_ie_len,
c8d65917
SG		 1324 const u8 *pwr_constr_ie,
1325 const u8 *cisco_dtpc_ie)
24a4e400 1326{
c8d65917
SG		 1327 bool has_80211h_pwr = false, has_cisco_pwr = false;
1328 int chan_pwr = 0, pwr_reduction_80211h = 0;
1329 int pwr_level_cisco, pwr_level_80211h;
24a4e400 1330 int new_ap_level;
a5fee9cb 1331 __le16 capab = mgmt->u.probe_resp.capab_info;
04b7b2ff 1332
a5fee9cb
MB		 1333 if (country_ie &&
1334 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) ||
1335 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) {
24a4e400
SG		 1336 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
1337 sdata, channel, country_ie, country_ie_len,
1338 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
c8d65917
SG		 1339 pwr_level_80211h =
1340 max_t(int, 0, chan_pwr - pwr_reduction_80211h);
1341 }
1342
1343 if (cisco_dtpc_ie) {
1344 ieee80211_find_cisco_dtpc(
1345 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
1346 has_cisco_pwr = true;
24a4e400 1347 }
04b7b2ff 1348
c8d65917 1349 if (!has_80211h_pwr && !has_cisco_pwr)
1ea6f9c0 1350 return 0;
04b7b2ff 1351
c8d65917
SG		 1352 /* If we have both 802.11h and Cisco DTPC, apply both limits
1353 * by picking the smallest of the two power levels advertised.
1354 */
1355 if (has_80211h_pwr &&
1356 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
cef2fc1c
JL		 1357 sdata_dbg(sdata,
1358 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1359 pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
1360 sdata->u.mgd.bssid);
c8d65917
SG		 1361 new_ap_level = pwr_level_80211h;
1362 } else { /* has_cisco_pwr is always true here. */
cef2fc1c
JL		 1363 sdata_dbg(sdata,
1364 "Limiting TX power to %d dBm as advertised by %pM\n",
1365 pwr_level_cisco, sdata->u.mgd.bssid);
c8d65917
SG		 1366 new_ap_level = pwr_level_cisco;
1367 }
04b7b2ff 1368
1ea6f9c0
JB		 1369 if (sdata->ap_power_level == new_ap_level)
1370 return 0;
04b7b2ff 1371
1ea6f9c0
JB		 1372 sdata->ap_power_level = new_ap_level;
1373 if (__ieee80211_recalc_txpower(sdata))
1374 return BSS_CHANGED_TXPOWER;
1375 return 0;
cc32abd4
JB		 1376}
1377
965bedad
JB		 1378/* powersave */
1379static void ieee80211_enable_ps(struct ieee80211_local *local,
1380 struct ieee80211_sub_if_data *sdata)
1381{
1382 struct ieee80211_conf *conf = &local->hw.conf;
1383
d5edaedc
JB		 1384 /*
1385 * If we are scanning right now then the parameters will
1386 * take effect when scan finishes.
1387 */
fbe9c429 1388 if (local->scanning)
d5edaedc
JB		 1389 return;
1390
965bedad 1391 if (conf->dynamic_ps_timeout > 0 &&
30686bf7 1392 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) {
965bedad
JB		 1393 mod_timer(&local->dynamic_ps_timer, jiffies +
1394 msecs_to_jiffies(conf->dynamic_ps_timeout));
1395 } else {
30686bf7 1396 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK))
965bedad 1397 ieee80211_send_nullfunc(local, sdata, 1);
375177bf 1398
30686bf7
JB		 1399 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1400 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
2a13052f
JO		 1401 return;
1402
1403 conf->flags |= IEEE80211_CONF_PS;
1404 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965bedad
JB		 1405 }
1406}
1407
1408static void ieee80211_change_ps(struct ieee80211_local *local)
1409{
1410 struct ieee80211_conf *conf = &local->hw.conf;
1411
1412 if (local->ps_sdata) {
965bedad
JB		 1413 ieee80211_enable_ps(local, local->ps_sdata);
1414 } else if (conf->flags & IEEE80211_CONF_PS) {
1415 conf->flags &= ~IEEE80211_CONF_PS;
1416 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1417 del_timer_sync(&local->dynamic_ps_timer);
1418 cancel_work_sync(&local->dynamic_ps_enable_work);
1419 }
1420}
1421
808118cb
JY		 1422static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1423{
1424 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1425 struct sta_info *sta = NULL;
c2c98fde 1426 bool authorized = false;
808118cb
JY		 1427
1428 if (!mgd->powersave)
1429 return false;
1430
05cb9108
JB		 1431 if (mgd->broken_ap)
1432 return false;
1433
808118cb
JY		 1434 if (!mgd->associated)
1435 return false;
1436
392b9ffb 1437 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
808118cb
JY		 1438 return false;
1439
989c6505 1440 if (!mgd->have_beacon)
ce857888
AB		 1441 return false;
1442
808118cb
JY		 1443 rcu_read_lock();
1444 sta = sta_info_get(sdata, mgd->bssid);
1445 if (sta)
c2c98fde 1446 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
808118cb
JY		 1447 rcu_read_unlock();
1448
c2c98fde 1449 return authorized;
808118cb
JY		 1450}
1451
965bedad 1452/* need to hold RTNL or interface lock */
10f644a4 1453void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 1454{
1455 struct ieee80211_sub_if_data *sdata, *found = NULL;
1456 int count = 0;
195e294d 1457 int timeout;
965bedad 1458
30686bf7 1459 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) {
965bedad
JB		 1460 local->ps_sdata = NULL;
1461 return;
1462 }
1463
1464 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 1465 if (!ieee80211_sdata_running(sdata))
965bedad 1466 continue;
8c7914de
RM		 1467 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1468 /* If an AP vif is found, then disable PS
1469 * by setting the count to zero thereby setting
1470 * ps_sdata to NULL.
1471 */
1472 count = 0;
1473 break;
1474 }
965bedad
JB		 1475 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1476 continue;
1477 found = sdata;
1478 count++;
1479 }
1480
808118cb 1481 if (count == 1 && ieee80211_powersave_allowed(found)) {
10f644a4
JB		 1482 s32 beaconint_us;
1483
1484 if (latency < 0)
ed77134b 1485 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
10f644a4
JB		 1486
1487 beaconint_us = ieee80211_tu_to_usec(
1488 found->vif.bss_conf.beacon_int);
1489
ff616381 1490 timeout = local->dynamic_ps_forced_timeout;
195e294d
JO		 1491 if (timeout < 0) {
1492 /*
ff616381
JO		 1493 * Go to full PSM if the user configures a very low
1494 * latency requirement.
0ab82b04
EP		 1495 * The 2000 second value is there for compatibility
1496 * until the PM_QOS_NETWORK_LATENCY is configured
1497 * with real values.
195e294d 1498 */
0ab82b04
EP		 1499 if (latency > (1900 * USEC_PER_MSEC) &&
1500 latency != (2000 * USEC_PER_SEC))
195e294d 1501 timeout = 0;
ff616381
JO		 1502 else
1503 timeout = 100;
195e294d 1504 }
09b85568 1505 local->hw.conf.dynamic_ps_timeout = timeout;
195e294d 1506
04fe2037 1507 if (beaconint_us > latency) {
10f644a4 1508 local->ps_sdata = NULL;
04fe2037 1509 } else {
04fe2037 1510 int maxslp = 1;
826262c3 1511 u8 dtimper = found->u.mgd.dtim_period;
56007a02
JB		 1512
1513 /* If the TIM IE is invalid, pretend the value is 1 */
1514 if (!dtimper)
1515 dtimper = 1;
1516 else if (dtimper > 1)
04fe2037
JB		 1517 maxslp = min_t(int, dtimper,
1518 latency / beaconint_us);
1519
9ccebe61 1520 local->hw.conf.max_sleep_period = maxslp;
56007a02 1521 local->hw.conf.ps_dtim_period = dtimper;
10f644a4 1522 local->ps_sdata = found;
04fe2037 1523 }
10f644a4 1524 } else {
965bedad 1525 local->ps_sdata = NULL;
10f644a4 1526 }
965bedad
JB		 1527
1528 ieee80211_change_ps(local);
1529}
1530
ab095877
EP		 1531void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1532{
1533 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1534
1535 if (sdata->vif.bss_conf.ps != ps_allowed) {
1536 sdata->vif.bss_conf.ps = ps_allowed;
1537 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1538 }
1539}
1540
965bedad
JB		 1541void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1542{
1543 struct ieee80211_local *local =
1544 container_of(work, struct ieee80211_local,
1545 dynamic_ps_disable_work);
1546
1547 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1548 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1549 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1550 }
1551
1552 ieee80211_wake_queues_by_reason(&local->hw,
445ea4e8 1553 IEEE80211_MAX_QUEUE_MAP,
cca07b00
LC		 1554 IEEE80211_QUEUE_STOP_REASON_PS,
1555 false);
965bedad
JB		 1556}
1557
1558void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1559{
1560 struct ieee80211_local *local =
1561 container_of(work, struct ieee80211_local,
1562 dynamic_ps_enable_work);
1563 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
5e34069c 1564 struct ieee80211_if_managed *ifmgd;
1ddc2867
RM		 1565 unsigned long flags;
1566 int q;
965bedad
JB		 1567
1568 /* can only happen when PS was just disabled anyway */
1569 if (!sdata)
1570 return;
1571
5e34069c
CL		 1572 ifmgd = &sdata->u.mgd;
1573
965bedad
JB		 1574 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1575 return;
1576
09b85568 1577 if (local->hw.conf.dynamic_ps_timeout > 0) {
77b7023a
AN		 1578 /* don't enter PS if TX frames are pending */
1579 if (drv_tx_frames_pending(local)) {
1ddc2867
RM		 1580 mod_timer(&local->dynamic_ps_timer, jiffies +
1581 msecs_to_jiffies(
1582 local->hw.conf.dynamic_ps_timeout));
1583 return;
1584 }
77b7023a
AN		 1585
1586 /*
1587 * transmission can be stopped by others which leads to
1588 * dynamic_ps_timer expiry. Postpone the ps timer if it
1589 * is not the actual idle state.
1590 */
1591 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1592 for (q = 0; q < local->hw.queues; q++) {
1593 if (local->queue_stop_reasons[q]) {
1594 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1595 flags);
1596 mod_timer(&local->dynamic_ps_timer, jiffies +
1597 msecs_to_jiffies(
1598 local->hw.conf.dynamic_ps_timeout));
1599 return;
1600 }
1601 }
1602 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1ddc2867 1603 }
1ddc2867 1604
30686bf7 1605 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
9c38a8b4 1606 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
a1598383 1607 if (drv_tx_frames_pending(local)) {
e8306f98
VN		 1608 mod_timer(&local->dynamic_ps_timer, jiffies +
1609 msecs_to_jiffies(
1610 local->hw.conf.dynamic_ps_timeout));
a1598383 1611 } else {
e8306f98
VN		 1612 ieee80211_send_nullfunc(local, sdata, 1);
1613 /* Flush to get the tx status of nullfunc frame */
3b24f4c6 1614 ieee80211_flush_queues(local, sdata, false);
e8306f98 1615 }
f3e85b9e
VN		 1616 }
1617
30686bf7
JB		 1618 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
1619 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) ||
375177bf
VN		 1620 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1621 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1622 local->hw.conf.flags |= IEEE80211_CONF_PS;
1623 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1624 }
965bedad
JB		 1625}
1626
1627void ieee80211_dynamic_ps_timer(unsigned long data)
1628{
1629 struct ieee80211_local *local = (void *) data;
1630
42935eca 1631 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 1632}
1633
164eb02d
SW		 1634void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1635{
1636 struct delayed_work *delayed_work =
1637 container_of(work, struct delayed_work, work);
1638 struct ieee80211_sub_if_data *sdata =
1639 container_of(delayed_work, struct ieee80211_sub_if_data,
1640 dfs_cac_timer_work);
d2859df5 1641 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
164eb02d 1642
34a3740d
JB		 1643 mutex_lock(&sdata->local->mtx);
1644 if (sdata->wdev.cac_started) {
1645 ieee80211_vif_release_channel(sdata);
1646 cfg80211_cac_event(sdata->dev, &chandef,
1647 NL80211_RADAR_CAC_FINISHED,
1648 GFP_KERNEL);
1649 }
1650 mutex_unlock(&sdata->local->mtx);
164eb02d
SW		 1651}
1652
02219b3a
JB		 1653static bool
1654__ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1655{
1656 struct ieee80211_local *local = sdata->local;
1657 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
cc72f6e2 1658 bool ret = false;
02219b3a
JB		 1659 int ac;
1660
1661 if (local->hw.queues < IEEE80211_NUM_ACS)
1662 return false;
1663
1664 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1665 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
1666 int non_acm_ac;
1667 unsigned long now = jiffies;
1668
1669 if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
1670 tx_tspec->admitted_time &&
1671 time_after(now, tx_tspec->time_slice_start + HZ)) {
1672 tx_tspec->consumed_tx_time = 0;
1673 tx_tspec->time_slice_start = now;
1674
1675 if (tx_tspec->downgraded)
1676 tx_tspec->action =
1677 TX_TSPEC_ACTION_STOP_DOWNGRADE;
1678 }
1679
1680 switch (tx_tspec->action) {
1681 case TX_TSPEC_ACTION_STOP_DOWNGRADE:
1682 /* take the original parameters */
1683 if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac]))
1684 sdata_err(sdata,
1685 "failed to set TX queue parameters for queue %d\n",
1686 ac);
1687 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1688 tx_tspec->downgraded = false;
1689 ret = true;
1690 break;
1691 case TX_TSPEC_ACTION_DOWNGRADE:
1692 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
1693 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1694 ret = true;
1695 break;
1696 }
1697 /* downgrade next lower non-ACM AC */
1698 for (non_acm_ac = ac + 1;
1699 non_acm_ac < IEEE80211_NUM_ACS;
1700 non_acm_ac++)
1701 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
1702 break;
1703 /* The loop will result in using BK even if it requires
1704 * admission control, such configuration makes no sense
1705 * and we have to transmit somehow - the AC selection
1706 * does the same thing.
1707 */
1708 if (drv_conf_tx(local, sdata, ac,
1709 &sdata->tx_conf[non_acm_ac]))
1710 sdata_err(sdata,
1711 "failed to set TX queue parameters for queue %d\n",
1712 ac);
1713 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1714 ret = true;
1715 schedule_delayed_work(&ifmgd->tx_tspec_wk,
1716 tx_tspec->time_slice_start + HZ - now + 1);
1717 break;
1718 case TX_TSPEC_ACTION_NONE:
1719 /* nothing now */
1720 break;
1721 }
1722 }
1723
1724 return ret;
1725}
1726
1727void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1728{
1729 if (__ieee80211_sta_handle_tspec_ac_params(sdata))
1730 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1731}
1732
1733static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
1734{
1735 struct ieee80211_sub_if_data *sdata;
1736
1737 sdata = container_of(work, struct ieee80211_sub_if_data,
1738 u.mgd.tx_tspec_wk.work);
1739 ieee80211_sta_handle_tspec_ac_params(sdata);
1740}
1741
60f8b39c 1742/* MLME */
7d25745d 1743static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
4ced3f74 1744 struct ieee80211_sub_if_data *sdata,
4a3cb702 1745 const u8 *wmm_param, size_t wmm_param_len)
f0706e82 1746{
f0706e82 1747 struct ieee80211_tx_queue_params params;
4ced3f74 1748 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1749 size_t left;
1750 int count;
4a3cb702
JB		 1751 const u8 *pos;
1752 u8 uapsd_queues = 0;
f0706e82 1753
e1b3ec1a 1754 if (!local->ops->conf_tx)
7d25745d 1755 return false;
e1b3ec1a 1756
32c5057b 1757 if (local->hw.queues < IEEE80211_NUM_ACS)
7d25745d 1758 return false;
3434fbd3
JB		 1759
1760 if (!wmm_param)
7d25745d 1761 return false;
3434fbd3 1762
f0706e82 1763 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
7d25745d 1764 return false;
ab13315a
KV		 1765
1766 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
dc41e4d4 1767 uapsd_queues = ifmgd->uapsd_queues;
ab13315a 1768
f0706e82 1769 count = wmm_param[6] & 0x0f;
46900298 1770 if (count == ifmgd->wmm_last_param_set)
7d25745d 1771 return false;
46900298 1772 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 1773
1774 pos = wmm_param + 8;
1775 left = wmm_param_len - 8;
1776
1777 memset(&params, 0, sizeof(params));
1778
00e96dec 1779 sdata->wmm_acm = 0;
f0706e82
JB		 1780 for (; left >= 4; left -= 4, pos += 4) {
1781 int aci = (pos[0] >> 5) & 0x03;
1782 int acm = (pos[0] >> 4) & 0x01;
ab13315a 1783 bool uapsd = false;
f0706e82
JB		 1784 int queue;
1785
1786 switch (aci) {
0eeb59fe 1787 case 1: /* AC_BK */
e100bb64 1788 queue = 3;
988c0f72 1789 if (acm)
00e96dec 1790 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV		 1791 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1792 uapsd = true;
f0706e82 1793 break;
0eeb59fe 1794 case 2: /* AC_VI */
e100bb64 1795 queue = 1;
988c0f72 1796 if (acm)
00e96dec 1797 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV		 1798 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1799 uapsd = true;
f0706e82 1800 break;
0eeb59fe 1801 case 3: /* AC_VO */
e100bb64 1802 queue = 0;
988c0f72 1803 if (acm)
00e96dec 1804 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV		 1805 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1806 uapsd = true;
f0706e82 1807 break;
0eeb59fe 1808 case 0: /* AC_BE */
f0706e82 1809 default:
e100bb64 1810 queue = 2;
988c0f72 1811 if (acm)
00e96dec 1812 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV		 1813 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1814 uapsd = true;
f0706e82
JB		 1815 break;
1816 }
1817
1818 params.aifs = pos[0] & 0x0f;
1819 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1820 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 1821 params.txop = get_unaligned_le16(pos + 2);
908f8d07 1822 params.acm = acm;
ab13315a
KV		 1823 params.uapsd = uapsd;
1824
bdcbd8e0 1825 mlme_dbg(sdata,
02219b3a 1826 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
bdcbd8e0
JB		 1827 queue, aci, acm,
1828 params.aifs, params.cw_min, params.cw_max,
02219b3a
JB		 1829 params.txop, params.uapsd,
1830 ifmgd->tx_tspec[queue].downgraded);
f6f3def3 1831 sdata->tx_conf[queue] = params;
02219b3a
JB		 1832 if (!ifmgd->tx_tspec[queue].downgraded &&
1833 drv_conf_tx(local, sdata, queue, &params))
bdcbd8e0
JB		 1834 sdata_err(sdata,
1835 "failed to set TX queue parameters for queue %d\n",
1836 queue);
f0706e82 1837 }
e1b3ec1a
SG		 1838
1839 /* enable WMM or activate new settings */
4ced3f74 1840 sdata->vif.bss_conf.qos = true;
7d25745d 1841 return true;
f0706e82
JB		 1842}
1843
925e64c3
SG		 1844static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1845{
1846 lockdep_assert_held(&sdata->local->mtx);
1847
392b9ffb 1848 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
925e64c3
SG		 1849 ieee80211_run_deferred_scan(sdata->local);
1850}
1851
1852static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1853{
1854 mutex_lock(&sdata->local->mtx);
1855 __ieee80211_stop_poll(sdata);
1856 mutex_unlock(&sdata->local->mtx);
1857}
1858
7a5158ef
JB		 1859static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1860 u16 capab, bool erp_valid, u8 erp)
5628221c 1861{
bda3933a 1862 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 1863 u32 changed = 0;
7a5158ef
JB		 1864 bool use_protection;
1865 bool use_short_preamble;
1866 bool use_short_slot;
1867
1868 if (erp_valid) {
1869 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1870 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1871 } else {
1872 use_protection = false;
1873 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1874 }
1875
1876 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
55de908a 1877 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
43d35343 1878 use_short_slot = true;
5628221c 1879
471b3efd 1880 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 1881 bss_conf->use_cts_prot = use_protection;
1882 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 1883 }
7e9ed188 1884
d43c7b37 1885 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 1886 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 1887 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 1888 }
d9430a32 1889
7a5158ef 1890 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 1891 bss_conf->use_short_slot = use_short_slot;
1892 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 1893 }
1894
1895 return changed;
1896}
1897
f698d856 1898static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 1899 struct cfg80211_bss *cbss,
ae5eb026 1900 u32 bss_info_changed)
f0706e82 1901{
0c1ad2ca 1902 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 1903 struct ieee80211_local *local = sdata->local;
68542962 1904 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
d6f2da5b 1905
ae5eb026 1906 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 1907 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
50ae34a2 1908 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 1909
7ccc8bd7 1910 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
59c1ec2b 1911 beacon_loss_count * bss_conf->beacon_int));
7ccc8bd7 1912
0c1ad2ca
JB		 1913 sdata->u.mgd.associated = cbss;
1914 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 1915
17e4ec14
JM		 1916 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1917
488dd7b5 1918 if (sdata->vif.p2p) {
9caf0364 1919 const struct cfg80211_bss_ies *ies;
488dd7b5 1920
9caf0364
JB		 1921 rcu_read_lock();
1922 ies = rcu_dereference(cbss->ies);
1923 if (ies) {
9caf0364
JB		 1924 int ret;
1925
1926 ret = cfg80211_get_p2p_attr(
1927 ies->data, ies->len,
1928 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
67baf663
JD		 1929 (u8 *) &bss_conf->p2p_noa_attr,
1930 sizeof(bss_conf->p2p_noa_attr));
9caf0364 1931 if (ret >= 2) {
67baf663
JD		 1932 sdata->u.mgd.p2p_noa_index =
1933 bss_conf->p2p_noa_attr.index;
9caf0364 1934 bss_info_changed |= BSS_CHANGED_P2P_PS;
9caf0364 1935 }
488dd7b5 1936 }
9caf0364 1937 rcu_read_unlock();
488dd7b5
JB		 1938 }
1939
b291ba11 1940 /* just to be sure */
925e64c3 1941 ieee80211_stop_poll(sdata);
b291ba11 1942
9ac19a90 1943 ieee80211_led_assoc(local, 1);
9306102e 1944
989c6505 1945 if (sdata->u.mgd.have_beacon) {
826262c3
JB		 1946 /*
1947 * If the AP is buggy we may get here with no DTIM period
1948 * known, so assume it's 1 which is the only safe assumption
1949 * in that case, although if the TIM IE is broken powersave
1950 * probably just won't work at all.
1951 */
1952 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
817cee76 1953 bss_conf->beacon_rate = bss->beacon_rate;
989c6505 1954 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
826262c3 1955 } else {
817cee76 1956 bss_conf->beacon_rate = NULL;
e5b900d2 1957 bss_conf->dtim_period = 0;
826262c3 1958 }
e5b900d2 1959
68542962 1960 bss_conf->assoc = 1;
9cef8737 1961
a97c13c3 1962 /* Tell the driver to monitor connection quality (if supported) */
ea086359 1963 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
68542962 1964 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 1965 bss_info_changed |= BSS_CHANGED_CQM;
1966
68542962 1967 /* Enable ARP filtering */
0f19b41e 1968 if (bss_conf->arp_addr_cnt)
68542962 1969 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
68542962 1970
ae5eb026 1971 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 1972
056508dc
JB		 1973 mutex_lock(&local->iflist_mtx);
1974 ieee80211_recalc_ps(local, -1);
1975 mutex_unlock(&local->iflist_mtx);
e0cb686f 1976
04ecd257 1977 ieee80211_recalc_smps(sdata);
ab095877
EP		 1978 ieee80211_recalc_ps_vif(sdata);
1979
9ac19a90 1980 netif_carrier_on(sdata->dev);
f0706e82
JB		 1981}
1982
e69e95db 1983static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
37ad3888
JB		 1984 u16 stype, u16 reason, bool tx,
1985 u8 *frame_buf)
aa458d17 1986{
46900298 1987 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17 1988 struct ieee80211_local *local = sdata->local;
3cc5240b 1989 u32 changed = 0;
aa458d17 1990
8d61ffa5 1991 sdata_assert_lock(sdata);
77fdaa12 1992
37ad3888
JB		 1993 if (WARN_ON_ONCE(tx && !frame_buf))
1994 return;
1995
b291ba11
JB		 1996 if (WARN_ON(!ifmgd->associated))
1997 return;
1998
79543d8e
DS		 1999 ieee80211_stop_poll(sdata);
2000
77fdaa12 2001 ifmgd->associated = NULL;
aa458d17
TW		 2002 netif_carrier_off(sdata->dev);
2003
88bc40e8
EP		 2004 /*
2005 * if we want to get out of ps before disassoc (why?) we have
2006 * to do it before sending disassoc, as otherwise the null-packet
2007 * won't be valid.
2008 */
2009 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2010 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2011 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2012 }
2013 local->ps_sdata = NULL;
2014
ab095877
EP		 2015 /* disable per-vif ps */
2016 ieee80211_recalc_ps_vif(sdata);
2017
14f2ae83
EG		 2018 /* make sure ongoing transmission finishes */
2019 synchronize_net();
2020
3b24f4c6
EG		 2021 /*
2022 * drop any frame before deauth/disassoc, this can be data or
2023 * management frame. Since we are disconnecting, we should not
2024 * insist sending these frames which can take time and delay
2025 * the disconnection and possible the roaming.
2026 */
f823981e 2027 if (tx)
3b24f4c6 2028 ieee80211_flush_queues(local, sdata, true);
f823981e 2029
37ad3888
JB		 2030 /* deauthenticate/disassociate now */
2031 if (tx || frame_buf)
88a9e31c
EP		 2032 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
2033 reason, tx, frame_buf);
37ad3888 2034
3b24f4c6 2035 /* flush out frame - make sure the deauth was actually sent */
37ad3888 2036 if (tx)
3b24f4c6 2037 ieee80211_flush_queues(local, sdata, false);
37ad3888 2038
88a9e31c 2039 /* clear bssid only after building the needed mgmt frames */
c84a67a2 2040 eth_zero_addr(ifmgd->bssid);
88a9e31c 2041
37ad3888 2042 /* remove AP and TDLS peers */
d34ba216 2043 sta_info_flush(sdata);
37ad3888
JB		 2044
2045 /* finally reset all BSS / config parameters */
f5e5bf25
TW		 2046 changed |= ieee80211_reset_erp_info(sdata);
2047
f5e5bf25 2048 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 2049 changed |= BSS_CHANGED_ASSOC;
2050 sdata->vif.bss_conf.assoc = false;
f5e5bf25 2051
67baf663
JD		 2052 ifmgd->p2p_noa_index = -1;
2053 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
2054 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
488dd7b5 2055
dd5ecfea 2056 /* on the next assoc, re-program HT/VHT parameters */
ef96a842
BG		 2057 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
2058 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
dd5ecfea
JB		 2059 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
2060 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
413ad50a 2061
1ea6f9c0 2062 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
a8302de9 2063
520eb820
KV		 2064 del_timer_sync(&local->dynamic_ps_timer);
2065 cancel_work_sync(&local->dynamic_ps_enable_work);
2066
68542962 2067 /* Disable ARP filtering */
0f19b41e 2068 if (sdata->vif.bss_conf.arp_addr_cnt)
68542962 2069 changed |= BSS_CHANGED_ARP_FILTER;
68542962 2070
3abead59
JB		 2071 sdata->vif.bss_conf.qos = false;
2072 changed |= BSS_CHANGED_QOS;
2073
0aaffa9b
JB		 2074 /* The BSSID (not really interesting) and HT changed */
2075 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 2076 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 2077
3abead59
JB		 2078 /* disassociated - set to defaults now */
2079 ieee80211_set_wmm_default(sdata, false);
2080
b9dcf712
JB		 2081 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
2082 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
2083 del_timer_sync(&sdata->u.mgd.timer);
2084 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2d9957cc 2085
826262c3 2086 sdata->vif.bss_conf.dtim_period = 0;
817cee76
AB		 2087 sdata->vif.bss_conf.beacon_rate = NULL;
2088
989c6505 2089 ifmgd->have_beacon = false;
826262c3 2090
028e8da0 2091 ifmgd->flags = 0;
34a3740d 2092 mutex_lock(&local->mtx);
028e8da0 2093 ieee80211_vif_release_channel(sdata);
59af6928
MK		 2094
2095 sdata->vif.csa_active = false;
0c21e632 2096 ifmgd->csa_waiting_bcn = false;
f84eaa10 2097 ifmgd->csa_ignored_same_chan = false;
a46992b4
LC		 2098 if (sdata->csa_block_tx) {
2099 ieee80211_wake_vif_queues(local, sdata,
2100 IEEE80211_QUEUE_STOP_REASON_CSA);
2101 sdata->csa_block_tx = false;
2102 }
34a3740d 2103 mutex_unlock(&local->mtx);
2475b1cc 2104
02219b3a
JB		 2105 /* existing TX TSPEC sessions no longer exist */
2106 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
2107 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
2108
2475b1cc 2109 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
aa458d17 2110}
f0706e82 2111
3cf335d5
KV		 2112void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
2113 struct ieee80211_hdr *hdr)
2114{
2115 /*
2116 * We can postpone the mgd.timer whenever receiving unicast frames
2117 * from AP because we know that the connection is working both ways
2118 * at that time. But multicast frames (and hence also beacons) must
2119 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 2120 * data idle periods for sending the periodic probe request to the
2121 * AP we're connected to.
3cf335d5 2122 */
b291ba11
JB		 2123 if (is_multicast_ether_addr(hdr->addr1))
2124 return;
2125
be099e82 2126 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 2127}
f0706e82 2128
4e5ff376
FF		 2129static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
2130{
2131 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
133d40f9 2132 struct ieee80211_local *local = sdata->local;
4e5ff376 2133
133d40f9 2134 mutex_lock(&local->mtx);
392b9ffb
SG		 2135 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
2136 goto out;
4e5ff376 2137
925e64c3 2138 __ieee80211_stop_poll(sdata);
133d40f9
SG		 2139
2140 mutex_lock(&local->iflist_mtx);
2141 ieee80211_recalc_ps(local, -1);
2142 mutex_unlock(&local->iflist_mtx);
4e5ff376 2143
30686bf7 2144 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
133d40f9 2145 goto out;
4e5ff376
FF		 2146
2147 /*
2148 * We've received a probe response, but are not sure whether
2149 * we have or will be receiving any beacons or data, so let's
2150 * schedule the timers again, just in case.
2151 */
2152 ieee80211_sta_reset_beacon_monitor(sdata);
2153
2154 mod_timer(&ifmgd->conn_mon_timer,
2155 round_jiffies_up(jiffies +
2156 IEEE80211_CONNECTION_IDLE_TIME));
133d40f9 2157out:
133d40f9 2158 mutex_unlock(&local->mtx);
4e5ff376
FF		 2159}
2160
02219b3a
JB		 2161static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
2162 struct ieee80211_hdr *hdr,
2163 u16 tx_time)
2164{
2165 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2166 u16 tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
2167 int ac = ieee80211_ac_from_tid(tid);
2168 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
2169 unsigned long now = jiffies;
2170
2171 if (likely(!tx_tspec->admitted_time))
2172 return;
2173
2174 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2175 tx_tspec->consumed_tx_time = 0;
2176 tx_tspec->time_slice_start = now;
2177
2178 if (tx_tspec->downgraded) {
2179 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
2180 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2181 }
2182 }
2183
2184 if (tx_tspec->downgraded)
2185 return;
2186
2187 tx_tspec->consumed_tx_time += tx_time;
2188
2189 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
2190 tx_tspec->downgraded = true;
2191 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
2192 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2193 }
2194}
2195
4e5ff376 2196void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
02219b3a 2197 struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
4e5ff376 2198{
02219b3a
JB		 2199 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
2200
75706d0e 2201 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF		 2202 return;
2203
4e5ff376
FF		 2204 if (ieee80211_is_nullfunc(hdr->frame_control) &&
2205 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e 2206 if (ack)
cab1c7fd 2207 ieee80211_sta_reset_conn_monitor(sdata);
04ac3c0e
FF		 2208 else
2209 sdata->u.mgd.nullfunc_failed = true;
4e5ff376 2210 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
cab1c7fd 2211 return;
4e5ff376 2212 }
cab1c7fd
WD		 2213
2214 if (ack)
2215 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF		 2216}
2217
a43abf29
ML		 2218static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2219{
2220 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2221 const u8 *ssid;
f01a067d 2222 u8 *dst = ifmgd->associated->bssid;
180205bd 2223 u8 unicast_limit = max(1, max_probe_tries - 3);
f01a067d
LR		 2224
2225 /*
2226 * Try sending broadcast probe requests for the last three
2227 * probe requests after the first ones failed since some
2228 * buggy APs only support broadcast probe requests.
2229 */
2230 if (ifmgd->probe_send_count >= unicast_limit)
2231 dst = NULL;
a43abf29 2232
4e5ff376
FF		 2233 /*
2234 * When the hardware reports an accurate Tx ACK status, it's
2235 * better to send a nullfunc frame instead of a probe request,
2236 * as it will kick us off the AP quickly if we aren't associated
2237 * anymore. The timeout will be reset if the frame is ACKed by
2238 * the AP.
2239 */
992e68bf
SD		 2240 ifmgd->probe_send_count++;
2241
30686bf7 2242 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) {
04ac3c0e 2243 ifmgd->nullfunc_failed = false;
4e5ff376 2244 ieee80211_send_nullfunc(sdata->local, sdata, 0);
04ac3c0e 2245 } else {
88c868c4
SG		 2246 int ssid_len;
2247
9caf0364 2248 rcu_read_lock();
4e5ff376 2249 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
88c868c4
SG		 2250 if (WARN_ON_ONCE(ssid == NULL))
2251 ssid_len = 0;
2252 else
2253 ssid_len = ssid[1];
2254
a73f8e21 2255 ieee80211_send_probe_req(sdata, sdata->vif.addr, dst,
a344d677 2256 ssid + 2, ssid_len, NULL,
1672c0e3 2257 0, (u32) -1, true, 0,
55de908a 2258 ifmgd->associated->channel, false);
9caf0364 2259 rcu_read_unlock();
4e5ff376 2260 }
a43abf29 2261
180205bd 2262 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
8d61ffa5 2263 run_again(sdata, ifmgd->probe_timeout);
a43abf29
ML		 2264}
2265
b291ba11
JB		 2266static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2267 bool beacon)
04de8381 2268{
04de8381 2269 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 2270 bool already = false;
34bfc411 2271
9607e6b6 2272 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 2273 return;
2274
8d61ffa5 2275 sdata_lock(sdata);
77fdaa12
JB		 2276
2277 if (!ifmgd->associated)
2278 goto out;
2279
133d40f9
SG		 2280 mutex_lock(&sdata->local->mtx);
2281
2282 if (sdata->local->tmp_channel || sdata->local->scanning) {
2283 mutex_unlock(&sdata->local->mtx);
2284 goto out;
2285 }
2286
a13fbe54 2287 if (beacon) {
bdcbd8e0 2288 mlme_dbg_ratelimited(sdata,
59c1ec2b
BG		 2289 "detected beacon loss from AP (missed %d beacons) - probing\n",
2290 beacon_loss_count);
bdcbd8e0 2291
98f03342 2292 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
a13fbe54 2293 }
04de8381 2294
b291ba11
JB		 2295 /*
2296 * The driver/our work has already reported this event or the
2297 * connection monitoring has kicked in and we have already sent
2298 * a probe request. Or maybe the AP died and the driver keeps
2299 * reporting until we disassociate...
2300 *
2301 * In either case we have to ignore the current call to this
2302 * function (except for setting the correct probe reason bit)
2303 * because otherwise we would reset the timer every time and
2304 * never check whether we received a probe response!
2305 */
392b9ffb 2306 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
b291ba11
JB		 2307 already = true;
2308
12b5f34d
EP		 2309 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2310
133d40f9
SG		 2311 mutex_unlock(&sdata->local->mtx);
2312
b291ba11
JB		 2313 if (already)
2314 goto out;
2315
4e751843
JB		 2316 mutex_lock(&sdata->local->iflist_mtx);
2317 ieee80211_recalc_ps(sdata->local, -1);
2318 mutex_unlock(&sdata->local->iflist_mtx);
2319
a43abf29
ML		 2320 ifmgd->probe_send_count = 0;
2321 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12 2322 out:
8d61ffa5 2323 sdata_unlock(sdata);
04de8381
KV		 2324}
2325
a619a4c0
JO		 2326struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2327 struct ieee80211_vif *vif)
2328{
2329 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2330 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d9b3b28b 2331 struct cfg80211_bss *cbss;
a619a4c0
JO		 2332 struct sk_buff *skb;
2333 const u8 *ssid;
88c868c4 2334 int ssid_len;
a619a4c0
JO		 2335
2336 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2337 return NULL;
2338
8d61ffa5 2339 sdata_assert_lock(sdata);
a619a4c0 2340
d9b3b28b
EP		 2341 if (ifmgd->associated)
2342 cbss = ifmgd->associated;
2343 else if (ifmgd->auth_data)
2344 cbss = ifmgd->auth_data->bss;
2345 else if (ifmgd->assoc_data)
2346 cbss = ifmgd->assoc_data->bss;
2347 else
a619a4c0
JO		 2348 return NULL;
2349
9caf0364 2350 rcu_read_lock();
d9b3b28b 2351 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
88c868c4
SG		 2352 if (WARN_ON_ONCE(ssid == NULL))
2353 ssid_len = 0;
2354 else
2355 ssid_len = ssid[1];
2356
a344d677 2357 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
55de908a 2358 (u32) -1, cbss->channel,
6b77863b 2359 ssid + 2, ssid_len,
85a237fe 2360 NULL, 0, true);
9caf0364 2361 rcu_read_unlock();
a619a4c0
JO		 2362
2363 return skb;
2364}
2365EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2366
a90faa9d
EG		 2367static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata,
2368 const u8 *buf, size_t len, bool tx,
2369 u16 reason)
2370{
2371 struct ieee80211_event event = {
2372 .type = MLME_EVENT,
2373 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT,
2374 .u.mlme.reason = reason,
2375 };
2376
2377 if (tx)
2378 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len);
2379 else
2380 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len);
2381
2382 drv_event_callback(sdata->local, sdata, &event);
2383}
2384
eef9e54c 2385static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
1e4dcd01 2386{
59af6928 2387 struct ieee80211_local *local = sdata->local;
1e4dcd01 2388 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 2389 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
1e4dcd01 2390
8d61ffa5 2391 sdata_lock(sdata);
1e4dcd01 2392 if (!ifmgd->associated) {
8d61ffa5 2393 sdata_unlock(sdata);
1e4dcd01
JO		 2394 return;
2395 }
2396
37ad3888
JB		 2397 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2398 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
eef9e54c 2399 true, frame_buf);
59af6928 2400 mutex_lock(&local->mtx);
7578d575 2401 sdata->vif.csa_active = false;
0c21e632 2402 ifmgd->csa_waiting_bcn = false;
a46992b4
LC		 2403 if (sdata->csa_block_tx) {
2404 ieee80211_wake_vif_queues(local, sdata,
2405 IEEE80211_QUEUE_STOP_REASON_CSA);
2406 sdata->csa_block_tx = false;
2407 }
59af6928 2408 mutex_unlock(&local->mtx);
7da7cc1d 2409
a90faa9d
EG		 2410 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
2411 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2412
8d61ffa5 2413 sdata_unlock(sdata);
1e4dcd01
JO		 2414}
2415
cc74c0c7 2416static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 2417{
2418 struct ieee80211_sub_if_data *sdata =
2419 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 2420 u.mgd.beacon_connection_loss_work);
a85e1d55
PS		 2421 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2422 struct sta_info *sta;
2423
2424 if (ifmgd->associated) {
30fa9047 2425 rcu_read_lock();
a85e1d55
PS		 2426 sta = sta_info_get(sdata, ifmgd->bssid);
2427 if (sta)
2428 sta->beacon_loss_count++;
30fa9047 2429 rcu_read_unlock();
a85e1d55 2430 }
b291ba11 2431
682bd38b 2432 if (ifmgd->connection_loss) {
882a7c69
JB		 2433 sdata_info(sdata, "Connection to AP %pM lost\n",
2434 ifmgd->bssid);
eef9e54c 2435 __ieee80211_disconnect(sdata);
882a7c69 2436 } else {
1e4dcd01 2437 ieee80211_mgd_probe_ap(sdata, true);
882a7c69
JB		 2438 }
2439}
2440
2441static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2442{
2443 struct ieee80211_sub_if_data *sdata =
2444 container_of(work, struct ieee80211_sub_if_data,
2445 u.mgd.csa_connection_drop_work);
2446
eef9e54c 2447 __ieee80211_disconnect(sdata);
b291ba11
JB		 2448}
2449
04de8381
KV		 2450void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2451{
2452 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 2453 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 2454
b5878a2d
JB		 2455 trace_api_beacon_loss(sdata);
2456
682bd38b 2457 sdata->u.mgd.connection_loss = false;
1e4dcd01 2458 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 2459}
2460EXPORT_SYMBOL(ieee80211_beacon_loss);
2461
1e4dcd01
JO		 2462void ieee80211_connection_loss(struct ieee80211_vif *vif)
2463{
2464 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2465 struct ieee80211_hw *hw = &sdata->local->hw;
2466
b5878a2d
JB		 2467 trace_api_connection_loss(sdata);
2468
682bd38b 2469 sdata->u.mgd.connection_loss = true;
1e4dcd01
JO		 2470 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2471}
2472EXPORT_SYMBOL(ieee80211_connection_loss);
2473
2474
66e67e41
JB		 2475static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2476 bool assoc)
2477{
2478 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2479
8d61ffa5 2480 sdata_assert_lock(sdata);
66e67e41 2481
66e67e41 2482 if (!assoc) {
c1e140bf
EG		 2483 /*
2484 * we are not authenticated yet, the only timer that could be
2485 * running is the timeout for the authentication response which
2486 * which is not relevant anymore.
2487 */
2488 del_timer_sync(&sdata->u.mgd.timer);
66e67e41
JB		 2489 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2490
c84a67a2 2491 eth_zero_addr(sdata->u.mgd.bssid);
66e67e41 2492 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
028e8da0 2493 sdata->u.mgd.flags = 0;
34a3740d 2494 mutex_lock(&sdata->local->mtx);
55de908a 2495 ieee80211_vif_release_channel(sdata);
34a3740d 2496 mutex_unlock(&sdata->local->mtx);
66e67e41
JB		 2497 }
2498
5b112d3d 2499 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
66e67e41
JB		 2500 kfree(auth_data);
2501 sdata->u.mgd.auth_data = NULL;
2502}
2503
c9c99f89
JB		 2504static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2505 bool assoc)
2506{
2507 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2508
2509 sdata_assert_lock(sdata);
2510
2511 if (!assoc) {
2512 /*
2513 * we are not associated yet, the only timer that could be
2514 * running is the timeout for the association response which
2515 * which is not relevant anymore.
2516 */
2517 del_timer_sync(&sdata->u.mgd.timer);
2518 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2519
2520 eth_zero_addr(sdata->u.mgd.bssid);
2521 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2522 sdata->u.mgd.flags = 0;
2523 mutex_lock(&sdata->local->mtx);
2524 ieee80211_vif_release_channel(sdata);
2525 mutex_unlock(&sdata->local->mtx);
2526 }
2527
2528 kfree(assoc_data);
2529 sdata->u.mgd.assoc_data = NULL;
2530}
2531
66e67e41
JB		 2532static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2533 struct ieee80211_mgmt *mgmt, size_t len)
2534{
1672c0e3 2535 struct ieee80211_local *local = sdata->local;
66e67e41
JB		 2536 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2537 u8 *pos;
2538 struct ieee802_11_elems elems;
1672c0e3 2539 u32 tx_flags = 0;
66e67e41
JB		 2540
2541 pos = mgmt->u.auth.variable;
b2e506bf 2542 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
66e67e41
JB		 2543 if (!elems.challenge)
2544 return;
2545 auth_data->expected_transaction = 4;
a1845fc7 2546 drv_mgd_prepare_tx(sdata->local, sdata);
30686bf7 2547 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1672c0e3
JB		 2548 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2549 IEEE80211_TX_INTFL_MLME_CONN_TX;
700e8ea6 2550 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
66e67e41
JB		 2551 elems.challenge - 2, elems.challenge_len + 2,
2552 auth_data->bss->bssid, auth_data->bss->bssid,
2553 auth_data->key, auth_data->key_len,
1672c0e3 2554 auth_data->key_idx, tx_flags);
66e67e41
JB		 2555}
2556
8d61ffa5
JB		 2557static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2558 struct ieee80211_mgmt *mgmt, size_t len)
66e67e41
JB		 2559{
2560 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2561 u8 bssid[ETH_ALEN];
2562 u16 auth_alg, auth_transaction, status_code;
2563 struct sta_info *sta;
a9409093
EG		 2564 struct ieee80211_event event = {
2565 .type = MLME_EVENT,
2566 .u.mlme.data = AUTH_EVENT,
2567 };
66e67e41 2568
8d61ffa5 2569 sdata_assert_lock(sdata);
66e67e41
JB		 2570
2571 if (len < 24 + 6)
8d61ffa5 2572 return;
66e67e41
JB		 2573
2574 if (!ifmgd->auth_data || ifmgd->auth_data->done)
8d61ffa5 2575 return;
66e67e41
JB		 2576
2577 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2578
b203ca39 2579 if (!ether_addr_equal(bssid, mgmt->bssid))
8d61ffa5 2580 return;
66e67e41
JB		 2581
2582 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2583 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2584 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2585
2586 if (auth_alg != ifmgd->auth_data->algorithm ||
0f4126e8
JM		 2587 auth_transaction != ifmgd->auth_data->expected_transaction) {
2588 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2589 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2590 auth_transaction,
2591 ifmgd->auth_data->expected_transaction);
8d61ffa5 2592 return;
0f4126e8 2593 }
66e67e41
JB		 2594
2595 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2596 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2597 mgmt->sa, status_code);
dac211ec 2598 ieee80211_destroy_auth_data(sdata, false);
6ff57cf8 2599 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
a9409093
EG		 2600 event.u.mlme.status = MLME_DENIED;
2601 event.u.mlme.reason = status_code;
2602 drv_event_callback(sdata->local, sdata, &event);
8d61ffa5 2603 return;
66e67e41
JB		 2604 }
2605
2606 switch (ifmgd->auth_data->algorithm) {
2607 case WLAN_AUTH_OPEN:
2608 case WLAN_AUTH_LEAP:
2609 case WLAN_AUTH_FT:
6b8ece3a 2610 case WLAN_AUTH_SAE:
66e67e41
JB		 2611 break;
2612 case WLAN_AUTH_SHARED_KEY:
2613 if (ifmgd->auth_data->expected_transaction != 4) {
2614 ieee80211_auth_challenge(sdata, mgmt, len);
2615 /* need another frame */
8d61ffa5 2616 return;
66e67e41
JB		 2617 }
2618 break;
2619 default:
2620 WARN_ONCE(1, "invalid auth alg %d",
2621 ifmgd->auth_data->algorithm);
8d61ffa5 2622 return;
66e67e41
JB		 2623 }
2624
a9409093
EG		 2625 event.u.mlme.status = MLME_SUCCESS;
2626 drv_event_callback(sdata->local, sdata, &event);
bdcbd8e0 2627 sdata_info(sdata, "authenticated\n");
66e67e41
JB		 2628 ifmgd->auth_data->done = true;
2629 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
89afe614 2630 ifmgd->auth_data->timeout_started = true;
8d61ffa5 2631 run_again(sdata, ifmgd->auth_data->timeout);
66e67e41 2632
6b8ece3a
JM		 2633 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2634 ifmgd->auth_data->expected_transaction != 2) {
2635 /*
2636 * Report auth frame to user space for processing since another
2637 * round of Authentication frames is still needed.
2638 */
6ff57cf8 2639 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
8d61ffa5 2640 return;
6b8ece3a
JM		 2641 }
2642
66e67e41
JB		 2643 /* move station state to auth */
2644 mutex_lock(&sdata->local->sta_mtx);
2645 sta = sta_info_get(sdata, bssid);
2646 if (!sta) {
2647 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2648 goto out_err;
2649 }
2650 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
bdcbd8e0 2651 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
66e67e41
JB		 2652 goto out_err;
2653 }
2654 mutex_unlock(&sdata->local->sta_mtx);
2655
6ff57cf8 2656 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
8d61ffa5 2657 return;
66e67e41
JB		 2658 out_err:
2659 mutex_unlock(&sdata->local->sta_mtx);
2660 /* ignore frame -- wait for timeout */
66e67e41
JB		 2661}
2662
dfa1ad29
CO		 2663#define case_WLAN(type) \
2664 case WLAN_REASON_##type: return #type
2665
2666static const char *ieee80211_get_reason_code_string(u16 reason_code)
2667{
2668 switch (reason_code) {
2669 case_WLAN(UNSPECIFIED);
2670 case_WLAN(PREV_AUTH_NOT_VALID);
2671 case_WLAN(DEAUTH_LEAVING);
2672 case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2673 case_WLAN(DISASSOC_AP_BUSY);
2674 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2675 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2676 case_WLAN(DISASSOC_STA_HAS_LEFT);
2677 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2678 case_WLAN(DISASSOC_BAD_POWER);
2679 case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2680 case_WLAN(INVALID_IE);
2681 case_WLAN(MIC_FAILURE);
2682 case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2683 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2684 case_WLAN(IE_DIFFERENT);
2685 case_WLAN(INVALID_GROUP_CIPHER);
2686 case_WLAN(INVALID_PAIRWISE_CIPHER);
2687 case_WLAN(INVALID_AKMP);
2688 case_WLAN(UNSUPP_RSN_VERSION);
2689 case_WLAN(INVALID_RSN_IE_CAP);
2690 case_WLAN(IEEE8021X_FAILED);
2691 case_WLAN(CIPHER_SUITE_REJECTED);
2692 case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2693 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2694 case_WLAN(DISASSOC_LOW_ACK);
2695 case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2696 case_WLAN(QSTA_LEAVE_QBSS);
2697 case_WLAN(QSTA_NOT_USE);
2698 case_WLAN(QSTA_REQUIRE_SETUP);
2699 case_WLAN(QSTA_TIMEOUT);
2700 case_WLAN(QSTA_CIPHER_NOT_SUPP);
2701 case_WLAN(MESH_PEER_CANCELED);
2702 case_WLAN(MESH_MAX_PEERS);
2703 case_WLAN(MESH_CONFIG);
2704 case_WLAN(MESH_CLOSE);
2705 case_WLAN(MESH_MAX_RETRIES);
2706 case_WLAN(MESH_CONFIRM_TIMEOUT);
2707 case_WLAN(MESH_INVALID_GTK);
2708 case_WLAN(MESH_INCONSISTENT_PARAM);
2709 case_WLAN(MESH_INVALID_SECURITY);
2710 case_WLAN(MESH_PATH_ERROR);
2711 case_WLAN(MESH_PATH_NOFORWARD);
2712 case_WLAN(MESH_PATH_DEST_UNREACHABLE);
2713 case_WLAN(MAC_EXISTS_IN_MBSS);
2714 case_WLAN(MESH_CHAN_REGULATORY);
2715 case_WLAN(MESH_CHAN);
2716 default: return "<unknown>";
2717 }
2718}
66e67e41 2719
8d61ffa5
JB		 2720static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2721 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2722{
46900298 2723 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
c9c99f89 2724 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
f0706e82 2725
8d61ffa5 2726 sdata_assert_lock(sdata);
66e67e41 2727
f4ea83dd 2728 if (len < 24 + 2)
8d61ffa5 2729 return;
f0706e82 2730
c9c99f89
JB		 2731 if (ifmgd->associated &&
2732 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) {
2733 const u8 *bssid = ifmgd->associated->bssid;
77fdaa12 2734
c9c99f89
JB		 2735 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
2736 bssid, reason_code,
2737 ieee80211_get_reason_code_string(reason_code));
f0706e82 2738
c9c99f89 2739 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
f0706e82 2740
c9c99f89
JB		 2741 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false,
2742 reason_code);
2743 return;
2744 }
77fdaa12 2745
c9c99f89
JB		 2746 if (ifmgd->assoc_data &&
2747 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
2748 const u8 *bssid = ifmgd->assoc_data->bss->bssid;
37ad3888 2749
c9c99f89
JB		 2750 sdata_info(sdata,
2751 "deauthenticated from %pM while associating (Reason: %u=%s)\n",
2752 bssid, reason_code,
2753 ieee80211_get_reason_code_string(reason_code));
2754
2755 ieee80211_destroy_assoc_data(sdata, false);
2756
2757 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2758 return;
2759 }
f0706e82
JB		 2760}
2761
2762
8d61ffa5
JB		 2763static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2764 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2765{
46900298 2766 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 2767 u16 reason_code;
2768
8d61ffa5 2769 sdata_assert_lock(sdata);
77fdaa12 2770
66e67e41 2771 if (len < 24 + 2)
8d61ffa5 2772 return;
77fdaa12 2773
66e67e41 2774 if (!ifmgd->associated ||
b203ca39 2775 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
8d61ffa5 2776 return;
f0706e82
JB		 2777
2778 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2779
bdcbd8e0
JB		 2780 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2781 mgmt->sa, reason_code);
f0706e82 2782
37ad3888
JB		 2783 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2784
a90faa9d 2785 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code);
f0706e82
JB		 2786}
2787
c74d084f
CL		 2788static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2789 u8 *supp_rates, unsigned int supp_rates_len,
2790 u32 *rates, u32 *basic_rates,
2791 bool *have_higher_than_11mbit,
2103dec1
SW		 2792 int *min_rate, int *min_rate_index,
2793 int shift, u32 rate_flags)
c74d084f
CL		 2794{
2795 int i, j;
2796
2797 for (i = 0; i < supp_rates_len; i++) {
2103dec1 2798 int rate = supp_rates[i] & 0x7f;
c74d084f
CL		 2799 bool is_basic = !!(supp_rates[i] & 0x80);
2800
2103dec1 2801 if ((rate * 5 * (1 << shift)) > 110)
c74d084f
CL		 2802 *have_higher_than_11mbit = true;
2803
2804 /*
2805 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2806 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2807 *
2808 * Note: Even through the membership selector and the basic
2809 * rate flag share the same bit, they are not exactly
2810 * the same.
2811 */
2812 if (!!(supp_rates[i] & 0x80) &&
2813 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2814 continue;
2815
2816 for (j = 0; j < sband->n_bitrates; j++) {
2103dec1
SW		 2817 struct ieee80211_rate *br;
2818 int brate;
2819
2820 br = &sband->bitrates[j];
2821 if ((rate_flags & br->flags) != rate_flags)
2822 continue;
2823
2824 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2825 if (brate == rate) {
c74d084f
CL		 2826 *rates |= BIT(j);
2827 if (is_basic)
2828 *basic_rates |= BIT(j);
2103dec1
SW		 2829 if ((rate * 5) < *min_rate) {
2830 *min_rate = rate * 5;
c74d084f
CL		 2831 *min_rate_index = j;
2832 }
2833 break;
2834 }
2835 }
2836 }
2837}
f0706e82 2838
66e67e41
JB		 2839static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2840 struct cfg80211_bss *cbss,
af6b6374 2841 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2842{
46900298 2843 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 2844 struct ieee80211_local *local = sdata->local;
8318d78a 2845 struct ieee80211_supported_band *sband;
f0706e82 2846 struct sta_info *sta;
af6b6374 2847 u8 *pos;
af6b6374 2848 u16 capab_info, aid;
f0706e82 2849 struct ieee802_11_elems elems;
bda3933a 2850 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
35d865af
JB		 2851 const struct cfg80211_bss_ies *bss_ies = NULL;
2852 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
ae5eb026 2853 u32 changed = 0;
c74d084f 2854 int err;
35d865af 2855 bool ret;
f0706e82 2856
af6b6374 2857 /* AssocResp and ReassocResp have identical structure */
f0706e82 2858
f0706e82 2859 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 2860 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 2861
1dd84aa2 2862 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
bdcbd8e0
JB		 2863 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2864 aid);
1dd84aa2
JB		 2865 aid &= ~(BIT(15) | BIT(14));
2866
05cb9108
JB		 2867 ifmgd->broken_ap = false;
2868
2869 if (aid == 0 || aid > IEEE80211_MAX_AID) {
bdcbd8e0
JB		 2870 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2871 aid);
05cb9108
JB		 2872 aid = 0;
2873 ifmgd->broken_ap = true;
2874 }
2875
af6b6374 2876 pos = mgmt->u.assoc_resp.variable;
b2e506bf 2877 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
af6b6374 2878
f0706e82 2879 if (!elems.supp_rates) {
bdcbd8e0 2880 sdata_info(sdata, "no SuppRates element in AssocResp\n");
af6b6374 2881 return false;
f0706e82
JB		 2882 }
2883
46900298 2884 ifmgd->aid = aid;
9041c1fa
AN		 2885 ifmgd->tdls_chan_switch_prohibited =
2886 elems.ext_capab && elems.ext_capab_len >= 5 &&
2887 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
f0706e82 2888
35d865af
JB		 2889 /*
2890 * Some APs are erroneously not including some information in their
2891 * (re)association response frames. Try to recover by using the data
2892 * from the beacon or probe response. This seems to afflict mobile
2893 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2894 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2895 */
2896 if ((assoc_data->wmm && !elems.wmm_param) ||
2897 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2898 (!elems.ht_cap_elem || !elems.ht_operation)) ||
2899 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2900 (!elems.vht_cap_elem || !elems.vht_operation))) {
2901 const struct cfg80211_bss_ies *ies;
2902 struct ieee802_11_elems bss_elems;
2903
2904 rcu_read_lock();
2905 ies = rcu_dereference(cbss->ies);
2906 if (ies)
2907 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2908 GFP_ATOMIC);
2909 rcu_read_unlock();
2910 if (!bss_ies)
2911 return false;
2912
2913 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2914 false, &bss_elems);
2915 if (assoc_data->wmm &&
2916 !elems.wmm_param && bss_elems.wmm_param) {
2917 elems.wmm_param = bss_elems.wmm_param;
2918 sdata_info(sdata,
2919 "AP bug: WMM param missing from AssocResp\n");
2920 }
2921
2922 /*
2923 * Also check if we requested HT/VHT, otherwise the AP doesn't
2924 * have to include the IEs in the (re)association response.
2925 */
2926 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2927 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2928 elems.ht_cap_elem = bss_elems.ht_cap_elem;
2929 sdata_info(sdata,
2930 "AP bug: HT capability missing from AssocResp\n");
2931 }
2932 if (!elems.ht_operation && bss_elems.ht_operation &&
2933 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2934 elems.ht_operation = bss_elems.ht_operation;
2935 sdata_info(sdata,
2936 "AP bug: HT operation missing from AssocResp\n");
2937 }
2938 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2939 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2940 elems.vht_cap_elem = bss_elems.vht_cap_elem;
2941 sdata_info(sdata,
2942 "AP bug: VHT capa missing from AssocResp\n");
2943 }
2944 if (!elems.vht_operation && bss_elems.vht_operation &&
2945 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2946 elems.vht_operation = bss_elems.vht_operation;
2947 sdata_info(sdata,
2948 "AP bug: VHT operation missing from AssocResp\n");
2949 }
2950 }
2951
30eb1dc2
JB		 2952 /*
2953 * We previously checked these in the beacon/probe response, so
2954 * they should be present here. This is just a safety net.
2955 */
2956 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2957 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2958 sdata_info(sdata,
35d865af
JB		 2959 "HT AP is missing WMM params or HT capability/operation\n");
2960 ret = false;
2961 goto out;
30eb1dc2
JB		 2962 }
2963
2964 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2965 (!elems.vht_cap_elem || !elems.vht_operation)) {
2966 sdata_info(sdata,
35d865af
JB		 2967 "VHT AP is missing VHT capability/operation\n");
2968 ret = false;
2969 goto out;
30eb1dc2
JB		 2970 }
2971
2a33bee2
GE		 2972 mutex_lock(&sdata->local->sta_mtx);
2973 /*
2974 * station info was already allocated and inserted before
2975 * the association and should be available to us
2976 */
7852e361 2977 sta = sta_info_get(sdata, cbss->bssid);
2a33bee2
GE		 2978 if (WARN_ON(!sta)) {
2979 mutex_unlock(&sdata->local->sta_mtx);
35d865af
JB		 2980 ret = false;
2981 goto out;
77fdaa12 2982 }
05e5e883 2983
55de908a 2984 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
f709fc69 2985
30eb1dc2 2986 /* Set up internal HT/VHT capabilities */
a8243b72 2987 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
ef96a842 2988 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
e1a0c6b3 2989 elems.ht_cap_elem, sta);
64f68e5d 2990
818255ea
MP		 2991 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2992 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
4a34215e 2993 elems.vht_cap_elem, sta);
818255ea 2994
30eb1dc2
JB		 2995 /*
2996 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
2997 * in their association response, so ignore that data for our own
2998 * configuration. If it changed since the last beacon, we'll get the
2999 * next beacon and update then.
3000 */
1128958d 3001
bee7f586
JB		 3002 /*
3003 * If an operating mode notification IE is present, override the
3004 * NSS calculation (that would be done in rate_control_rate_init())
3005 * and use the # of streams from that element.
3006 */
3007 if (elems.opmode_notif &&
3008 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
3009 u8 nss;
3010
3011 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
3012 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
3013 nss += 1;
3014 sta->sta.rx_nss = nss;
3015 }
3016
4b7679a5 3017 rate_control_rate_init(sta);
f0706e82 3018
5c48f120 3019 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
c2c98fde 3020 set_sta_flag(sta, WLAN_STA_MFP);
5394af4d 3021
527871d7 3022 sta->sta.wme = elems.wmm_param && local->hw.queues >= IEEE80211_NUM_ACS;
ddf4ac53 3023
3e4d40fa 3024 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
c8987876
JB		 3025 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
3026 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
3027 if (err) {
bdcbd8e0
JB		 3028 sdata_info(sdata,
3029 "failed to move station %pM to desired state\n",
3030 sta->sta.addr);
c8987876
JB		 3031 WARN_ON(__sta_info_destroy(sta));
3032 mutex_unlock(&sdata->local->sta_mtx);
35d865af
JB		 3033 ret = false;
3034 goto out;
c8987876
JB		 3035 }
3036
7852e361 3037 mutex_unlock(&sdata->local->sta_mtx);
ddf4ac53 3038
f2176d72
JO		 3039 /*
3040 * Always handle WMM once after association regardless
3041 * of the first value the AP uses. Setting -1 here has
3042 * that effect because the AP values is an unsigned
3043 * 4-bit value.
3044 */
3045 ifmgd->wmm_last_param_set = -1;
3046
095d81ce 3047 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && elems.wmm_param)
4ced3f74 3048 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 3049 elems.wmm_param_len);
aa837e1d 3050 else
3abead59
JB		 3051 ieee80211_set_wmm_default(sdata, false);
3052 changed |= BSS_CHANGED_QOS;
f0706e82 3053
60f8b39c
JB		 3054 /* set AID and assoc capability,
3055 * ieee80211_set_associated() will tell the driver */
3056 bss_conf->aid = aid;
3057 bss_conf->assoc_capability = capab_info;
0c1ad2ca 3058 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 3059
d524215f
FF		 3060 /*
3061 * If we're using 4-addr mode, let the AP know that we're
3062 * doing so, so that it can create the STA VLAN on its side
3063 */
3064 if (ifmgd->use_4addr)
3065 ieee80211_send_4addr_nullfunc(local, sdata);
3066
15b7b062 3067 /*
b291ba11
JB		 3068 * Start timer to probe the connection to the AP now.
3069 * Also start the timer that will detect beacon loss.
15b7b062 3070 */
b291ba11 3071 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 3072 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 3073
35d865af
JB		 3074 ret = true;
3075 out:
3076 kfree(bss_ies);
3077 return ret;
f0706e82
JB		 3078}
3079
8d61ffa5
JB		 3080static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
3081 struct ieee80211_mgmt *mgmt,
3082 size_t len)
66e67e41
JB		 3083{
3084 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3085 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3086 u16 capab_info, status_code, aid;
3087 struct ieee802_11_elems elems;
b0b6aa2c 3088 int ac, uapsd_queues = -1;
66e67e41
JB		 3089 u8 *pos;
3090 bool reassoc;
8d61ffa5 3091 struct cfg80211_bss *bss;
d0d1a12f
EG		 3092 struct ieee80211_event event = {
3093 .type = MLME_EVENT,
3094 .u.mlme.data = ASSOC_EVENT,
3095 };
66e67e41 3096
8d61ffa5 3097 sdata_assert_lock(sdata);
66e67e41
JB		 3098
3099 if (!assoc_data)
8d61ffa5 3100 return;
b203ca39 3101 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
8d61ffa5 3102 return;
66e67e41
JB		 3103
3104 /*
3105 * AssocResp and ReassocResp have identical structure, so process both
3106 * of them in this function.
3107 */
3108
3109 if (len < 24 + 6)
8d61ffa5 3110 return;
66e67e41
JB		 3111
3112 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
3113 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3114 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
3115 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3116
bdcbd8e0
JB		 3117 sdata_info(sdata,
3118 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3119 reassoc ? "Rea" : "A", mgmt->sa,
3120 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
66e67e41
JB		 3121
3122 pos = mgmt->u.assoc_resp.variable;
b2e506bf 3123 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
66e67e41
JB		 3124
3125 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
79ba1d89
JB		 3126 elems.timeout_int &&
3127 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
66e67e41 3128 u32 tu, ms;
79ba1d89 3129 tu = le32_to_cpu(elems.timeout_int->value);
66e67e41 3130 ms = tu * 1024 / 1000;
bdcbd8e0
JB		 3131 sdata_info(sdata,
3132 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3133 mgmt->sa, tu, ms);
66e67e41 3134 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
89afe614 3135 assoc_data->timeout_started = true;
66e67e41 3136 if (ms > IEEE80211_ASSOC_TIMEOUT)
8d61ffa5
JB		 3137 run_again(sdata, assoc_data->timeout);
3138 return;
66e67e41
JB		 3139 }
3140
8d61ffa5 3141 bss = assoc_data->bss;
66e67e41
JB		 3142
3143 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 3144 sdata_info(sdata, "%pM denied association (code=%d)\n",
3145 mgmt->sa, status_code);
66e67e41 3146 ieee80211_destroy_assoc_data(sdata, false);
d0d1a12f
EG		 3147 event.u.mlme.status = MLME_DENIED;
3148 event.u.mlme.reason = status_code;
3149 drv_event_callback(sdata->local, sdata, &event);
66e67e41 3150 } else {
8d61ffa5 3151 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
66e67e41 3152 /* oops -- internal error -- send timeout for now */
10a9109f 3153 ieee80211_destroy_assoc_data(sdata, false);
959867fa 3154 cfg80211_assoc_timeout(sdata->dev, bss);
8d61ffa5 3155 return;
66e67e41 3156 }
d0d1a12f
EG		 3157 event.u.mlme.status = MLME_SUCCESS;
3158 drv_event_callback(sdata->local, sdata, &event);
635d999f 3159 sdata_info(sdata, "associated\n");
79ebfb85
JB		 3160
3161 /*
3162 * destroy assoc_data afterwards, as otherwise an idle
3163 * recalc after assoc_data is NULL but before associated
3164 * is set can cause the interface to go idle
3165 */
3166 ieee80211_destroy_assoc_data(sdata, true);
b0b6aa2c
EP		 3167
3168 /* get uapsd queues configuration */
3169 uapsd_queues = 0;
3170 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
3171 if (sdata->tx_conf[ac].uapsd)
3172 uapsd_queues |= BIT(ac);
66e67e41
JB		 3173 }
3174
b0b6aa2c 3175 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues);
66e67e41 3176}
8e3c1b77 3177
98c8fccf 3178static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
8e3c1b77 3179 struct ieee80211_mgmt *mgmt, size_t len,
98c8fccf 3180 struct ieee80211_rx_status *rx_status,
d45c4172 3181 struct ieee802_11_elems *elems)
98c8fccf
JB		 3182{
3183 struct ieee80211_local *local = sdata->local;
c2b13452 3184 struct ieee80211_bss *bss;
98c8fccf 3185 struct ieee80211_channel *channel;
56007a02 3186
8d61ffa5 3187 sdata_assert_lock(sdata);
b4f286a1 3188
3afc2167
EG		 3189 channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
3190 if (!channel)
98c8fccf
JB		 3191 return;
3192
98c8fccf 3193 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
d45c4172 3194 channel);
817cee76 3195 if (bss) {
817cee76 3196 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
d2722f8b 3197 ieee80211_rx_bss_put(local, bss);
817cee76 3198 }
f0706e82
JB		 3199}
3200
3201
f698d856 3202static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 3203 struct sk_buff *skb)
f0706e82 3204{
af6b6374 3205 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 3206 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 3207 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
3208 size_t baselen, len = skb->len;
ae6a44e3
EK		 3209 struct ieee802_11_elems elems;
3210
15b7b062
KV		 3211 ifmgd = &sdata->u.mgd;
3212
8d61ffa5 3213 sdata_assert_lock(sdata);
77fdaa12 3214
b203ca39 3215 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
8e7cdbb6
TW		 3216 return; /* ignore ProbeResp to foreign address */
3217
ae6a44e3
EK		 3218 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
3219 if (baselen > len)
3220 return;
3221
3222 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
b2e506bf 3223 false, &elems);
ae6a44e3 3224
d45c4172 3225 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
9859b81e 3226
77fdaa12 3227 if (ifmgd->associated &&
b203ca39 3228 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
4e5ff376 3229 ieee80211_reset_ap_probe(sdata);
66e67e41
JB		 3230
3231 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
b203ca39 3232 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
66e67e41 3233 /* got probe response, continue with auth */
bdcbd8e0 3234 sdata_info(sdata, "direct probe responded\n");
66e67e41
JB		 3235 ifmgd->auth_data->tries = 0;
3236 ifmgd->auth_data->timeout = jiffies;
89afe614 3237 ifmgd->auth_data->timeout_started = true;
8d61ffa5 3238 run_again(sdata, ifmgd->auth_data->timeout);
66e67e41 3239 }
f0706e82
JB		 3240}
3241
d91f36db
JB		 3242/*
3243 * This is the canonical list of information elements we care about,
3244 * the filter code also gives us all changes to the Microsoft OUI
c8d65917
SG		 3245 * (00:50:F2) vendor IE which is used for WMM which we need to track,
3246 * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3247 * changes to requested client power.
d91f36db
JB		 3248 *
3249 * We implement beacon filtering in software since that means we can
3250 * avoid processing the frame here and in cfg80211, and userspace
3251 * will not be able to tell whether the hardware supports it or not.
3252 *
3253 * XXX: This list needs to be dynamic -- userspace needs to be able to
3254 * add items it requires. It also needs to be able to tell us to
3255 * look out for other vendor IEs.
3256 */
3257static const u64 care_about_ies =
1d4df3a5
JB		 3258 (1ULL << WLAN_EID_COUNTRY) |
3259 (1ULL << WLAN_EID_ERP_INFO) |
3260 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
3261 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
3262 (1ULL << WLAN_EID_HT_CAPABILITY) |
70a3fd6c
JB		 3263 (1ULL << WLAN_EID_HT_OPERATION) |
3264 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN);
d91f36db 3265
8d61ffa5
JB		 3266static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
3267 struct ieee80211_mgmt *mgmt, size_t len,
3268 struct ieee80211_rx_status *rx_status)
f0706e82 3269{
d91f36db 3270 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 3271 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 3272 size_t baselen;
3273 struct ieee802_11_elems elems;
f698d856 3274 struct ieee80211_local *local = sdata->local;
55de908a
JB		 3275 struct ieee80211_chanctx_conf *chanctx_conf;
3276 struct ieee80211_channel *chan;
bee7f586 3277 struct sta_info *sta;
471b3efd 3278 u32 changed = 0;
f87ad637 3279 bool erp_valid;
7a5158ef 3280 u8 erp_value = 0;
d91f36db 3281 u32 ncrc;
77fdaa12 3282 u8 *bssid;
8d61ffa5 3283 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
77fdaa12 3284
8d61ffa5 3285 sdata_assert_lock(sdata);
f0706e82 3286
ae6a44e3
EK		 3287 /* Process beacon from the current BSS */
3288 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3289 if (baselen > len)
8d61ffa5 3290 return;
ae6a44e3 3291
55de908a
JB		 3292 rcu_read_lock();
3293 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3294 if (!chanctx_conf) {
3295 rcu_read_unlock();
8d61ffa5 3296 return;
55de908a
JB		 3297 }
3298
4bf88530 3299 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
55de908a 3300 rcu_read_unlock();
8d61ffa5 3301 return;
55de908a 3302 }
4bf88530 3303 chan = chanctx_conf->def.chan;
55de908a 3304 rcu_read_unlock();
f0706e82 3305
c65dd147 3306 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
b203ca39 3307 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
66e67e41 3308 ieee802_11_parse_elems(mgmt->u.beacon.variable,
b2e506bf 3309 len - baselen, false, &elems);
77fdaa12 3310
d45c4172 3311 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
482a9c74
AB		 3312 if (elems.tim && !elems.parse_error) {
3313 const struct ieee80211_tim_ie *tim_ie = elems.tim;
3314 ifmgd->dtim_period = tim_ie->dtim_period;
3315 }
989c6505 3316 ifmgd->have_beacon = true;
c65dd147 3317 ifmgd->assoc_data->need_beacon = false;
30686bf7 3318 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
ef429dad
JB		 3319 sdata->vif.bss_conf.sync_tsf =
3320 le64_to_cpu(mgmt->u.beacon.timestamp);
3321 sdata->vif.bss_conf.sync_device_ts =
3322 rx_status->device_timestamp;
3323 if (elems.tim)
3324 sdata->vif.bss_conf.sync_dtim_count =
3325 elems.tim->dtim_count;
3326 else
3327 sdata->vif.bss_conf.sync_dtim_count = 0;
3328 }
66e67e41
JB		 3329 /* continue assoc process */
3330 ifmgd->assoc_data->timeout = jiffies;
89afe614 3331 ifmgd->assoc_data->timeout_started = true;
8d61ffa5
JB		 3332 run_again(sdata, ifmgd->assoc_data->timeout);
3333 return;
66e67e41 3334 }
77fdaa12 3335
66e67e41 3336 if (!ifmgd->associated ||
b203ca39 3337 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
8d61ffa5 3338 return;
66e67e41 3339 bssid = ifmgd->associated->bssid;
f0706e82 3340
17e4ec14
JM		 3341 /* Track average RSSI from the Beacon frames of the current AP */
3342 ifmgd->last_beacon_signal = rx_status->signal;
3343 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3344 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3ba06c6f 3345 ifmgd->ave_beacon_signal = rx_status->signal * 16;
17e4ec14 3346 ifmgd->last_cqm_event_signal = 0;
391a200a 3347 ifmgd->count_beacon_signal = 1;
615f7b9b 3348 ifmgd->last_ave_beacon_signal = 0;
17e4ec14
JM		 3349 } else {
3350 ifmgd->ave_beacon_signal =
3351 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
3352 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
3353 ifmgd->ave_beacon_signal) / 16;
391a200a 3354 ifmgd->count_beacon_signal++;
17e4ec14 3355 }
615f7b9b
MV		 3356
3357 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3358 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3359 int sig = ifmgd->ave_beacon_signal;
3360 int last_sig = ifmgd->last_ave_beacon_signal;
a8182929
EG		 3361 struct ieee80211_event event = {
3362 .type = RSSI_EVENT,
3363 };
615f7b9b
MV		 3364
3365 /*
3366 * if signal crosses either of the boundaries, invoke callback
3367 * with appropriate parameters
3368 */
3369 if (sig > ifmgd->rssi_max_thold &&
3370 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3371 ifmgd->last_ave_beacon_signal = sig;
a8182929
EG		 3372 event.u.rssi.data = RSSI_EVENT_HIGH;
3373 drv_event_callback(local, sdata, &event);
615f7b9b
MV		 3374 } else if (sig < ifmgd->rssi_min_thold &&
3375 (last_sig >= ifmgd->rssi_max_thold ||
3376 last_sig == 0)) {
3377 ifmgd->last_ave_beacon_signal = sig;
a8182929
EG		 3378 event.u.rssi.data = RSSI_EVENT_LOW;
3379 drv_event_callback(local, sdata, &event);
615f7b9b
MV		 3380 }
3381 }
3382
17e4ec14 3383 if (bss_conf->cqm_rssi_thold &&
391a200a 3384 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
ea086359 3385 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
17e4ec14
JM		 3386 int sig = ifmgd->ave_beacon_signal / 16;
3387 int last_event = ifmgd->last_cqm_event_signal;
3388 int thold = bss_conf->cqm_rssi_thold;
3389 int hyst = bss_conf->cqm_rssi_hyst;
3390 if (sig < thold &&
3391 (last_event == 0 || sig < last_event - hyst)) {
3392 ifmgd->last_cqm_event_signal = sig;
3393 ieee80211_cqm_rssi_notify(
3394 &sdata->vif,
3395 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3396 GFP_KERNEL);
3397 } else if (sig > thold &&
3398 (last_event == 0 || sig > last_event + hyst)) {
3399 ifmgd->last_cqm_event_signal = sig;
3400 ieee80211_cqm_rssi_notify(
3401 &sdata->vif,
3402 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3403 GFP_KERNEL);
3404 }
3405 }
3406
392b9ffb 3407 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
bdcbd8e0 3408 mlme_dbg_ratelimited(sdata,
112c31f0 3409 "cancelling AP probe due to a received beacon\n");
392b9ffb 3410 ieee80211_reset_ap_probe(sdata);
92778180
JM		 3411 }
3412
b291ba11
JB		 3413 /*
3414 * Push the beacon loss detection into the future since
3415 * we are processing a beacon from the AP just now.
3416 */
d3a910a8 3417 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 3418
d91f36db
JB		 3419 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3420 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
b2e506bf 3421 len - baselen, false, &elems,
d91f36db
JB		 3422 care_about_ies, ncrc);
3423
30686bf7 3424 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) {
f87ad637
RR		 3425 bool directed_tim = ieee80211_check_tim(elems.tim,
3426 elems.tim_len,
3427 ifmgd->aid);
1fb3606b 3428 if (directed_tim) {
572e0012 3429 if (local->hw.conf.dynamic_ps_timeout > 0) {
70b12f26
RW		 3430 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3431 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3432 ieee80211_hw_config(local,
3433 IEEE80211_CONF_CHANGE_PS);
3434 }
572e0012 3435 ieee80211_send_nullfunc(local, sdata, 0);
6f0756a3 3436 } else if (!local->pspolling && sdata->u.mgd.powersave) {
572e0012
KV		 3437 local->pspolling = true;
3438
3439 /*
3440 * Here is assumed that the driver will be
3441 * able to send ps-poll frame and receive a
3442 * response even though power save mode is
3443 * enabled, but some drivers might require
3444 * to disable power save here. This needs
3445 * to be investigated.
3446 */
3447 ieee80211_send_pspoll(local, sdata);
3448 }
a97b77b9
VN		 3449 }
3450 }
7a5158ef 3451
488dd7b5 3452 if (sdata->vif.p2p) {
67baf663 3453 struct ieee80211_p2p_noa_attr noa = {};
488dd7b5
JB		 3454 int ret;
3455
3456 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3457 len - baselen,
3458 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
934457ee 3459 (u8 *) &noa, sizeof(noa));
67baf663
JD		 3460 if (ret >= 2) {
3461 if (sdata->u.mgd.p2p_noa_index != noa.index) {
3462 /* valid noa_attr and index changed */
3463 sdata->u.mgd.p2p_noa_index = noa.index;
3464 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3465 changed |= BSS_CHANGED_P2P_PS;
3466 /*
3467 * make sure we update all information, the CRC
3468 * mechanism doesn't look at P2P attributes.
3469 */
3470 ifmgd->beacon_crc_valid = false;
3471 }
3472 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3473 /* noa_attr not found and we had valid noa_attr before */
3474 sdata->u.mgd.p2p_noa_index = -1;
3475 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
488dd7b5 3476 changed |= BSS_CHANGED_P2P_PS;
488dd7b5
JB		 3477 ifmgd->beacon_crc_valid = false;
3478 }
3479 }
3480
0c21e632
LC		 3481 if (ifmgd->csa_waiting_bcn)
3482 ieee80211_chswitch_post_beacon(sdata);
3483
2ecc3905
AB		 3484 /*
3485 * Update beacon timing and dtim count on every beacon appearance. This
3486 * will allow the driver to use the most updated values. Do it before
3487 * comparing this one with last received beacon.
3488 * IMPORTANT: These parameters would possibly be out of sync by the time
3489 * the driver will use them. The synchronized view is currently
3490 * guaranteed only in certain callbacks.
3491 */
30686bf7 3492 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
2ecc3905
AB		 3493 sdata->vif.bss_conf.sync_tsf =
3494 le64_to_cpu(mgmt->u.beacon.timestamp);
3495 sdata->vif.bss_conf.sync_device_ts =
3496 rx_status->device_timestamp;
3497 if (elems.tim)
3498 sdata->vif.bss_conf.sync_dtim_count =
3499 elems.tim->dtim_count;
3500 else
3501 sdata->vif.bss_conf.sync_dtim_count = 0;
3502 }
3503
d8ec4433 3504 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
8d61ffa5 3505 return;
30196673 3506 ifmgd->beacon_crc = ncrc;
d8ec4433 3507 ifmgd->beacon_crc_valid = true;
30196673 3508
d45c4172 3509 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
7d25745d 3510
d70b7616 3511 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
2ba45384 3512 rx_status->device_timestamp,
d70b7616
JB		 3513 &elems, true);
3514
095d81ce
JB		 3515 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3516 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
7d25745d
JB		 3517 elems.wmm_param_len))
3518 changed |= BSS_CHANGED_QOS;
3519
c65dd147
EG		 3520 /*
3521 * If we haven't had a beacon before, tell the driver about the
ef429dad 3522 * DTIM period (and beacon timing if desired) now.
c65dd147 3523 */
989c6505 3524 if (!ifmgd->have_beacon) {
c65dd147
EG		 3525 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3526 if (elems.tim)
3527 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3528 else
3529 bss_conf->dtim_period = 1;
ef429dad 3530
989c6505
AB		 3531 changed |= BSS_CHANGED_BEACON_INFO;
3532 ifmgd->have_beacon = true;
482a9c74
AB		 3533
3534 mutex_lock(&local->iflist_mtx);
3535 ieee80211_recalc_ps(local, -1);
3536 mutex_unlock(&local->iflist_mtx);
3537
ce857888 3538 ieee80211_recalc_ps_vif(sdata);
c65dd147
EG		 3539 }
3540
1946bed9 3541 if (elems.erp_info) {
7a5158ef
JB		 3542 erp_valid = true;
3543 erp_value = elems.erp_info[0];
3544 } else {
3545 erp_valid = false;
50c4afb9 3546 }
7a5158ef
JB		 3547 changed |= ieee80211_handle_bss_capability(sdata,
3548 le16_to_cpu(mgmt->u.beacon.capab_info),
3549 erp_valid, erp_value);
f0706e82 3550
1128958d 3551 mutex_lock(&local->sta_mtx);
bee7f586
JB		 3552 sta = sta_info_get(sdata, bssid);
3553
53b954ee
EP		 3554 if (ieee80211_config_bw(sdata, sta,
3555 elems.ht_cap_elem, elems.ht_operation,
30eb1dc2
JB		 3556 elems.vht_operation, bssid, &changed)) {
3557 mutex_unlock(&local->sta_mtx);
3558 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3559 WLAN_REASON_DEAUTH_LEAVING,
3560 true, deauth_buf);
a90faa9d
EG		 3561 ieee80211_report_disconnect(sdata, deauth_buf,
3562 sizeof(deauth_buf), true,
3563 WLAN_REASON_DEAUTH_LEAVING);
8d61ffa5 3564 return;
30eb1dc2 3565 }
bee7f586
JB		 3566
3567 if (sta && elems.opmode_notif)
3568 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3569 rx_status->band, true);
1128958d 3570 mutex_unlock(&local->sta_mtx);
d3c990fb 3571
24a4e400
SG		 3572 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
3573 elems.country_elem,
3574 elems.country_elem_len,
c8d65917
SG		 3575 elems.pwr_constr_elem,
3576 elems.cisco_dtpc_elem);
3f2355cb 3577
471b3efd 3578 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 3579}
3580
1fa57d01
JB		 3581void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3582 struct sk_buff *skb)
f0706e82
JB		 3583{
3584 struct ieee80211_rx_status *rx_status;
f0706e82
JB		 3585 struct ieee80211_mgmt *mgmt;
3586 u16 fc;
1b3a2e49
JB		 3587 struct ieee802_11_elems elems;
3588 int ies_len;
f0706e82 3589
f0706e82
JB		 3590 rx_status = (struct ieee80211_rx_status *) skb->cb;
3591 mgmt = (struct ieee80211_mgmt *) skb->data;
3592 fc = le16_to_cpu(mgmt->frame_control);
3593
8d61ffa5 3594 sdata_lock(sdata);
77fdaa12 3595
66e67e41
JB		 3596 switch (fc & IEEE80211_FCTL_STYPE) {
3597 case IEEE80211_STYPE_BEACON:
8d61ffa5 3598 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
66e67e41
JB		 3599 break;
3600 case IEEE80211_STYPE_PROBE_RESP:
3601 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3602 break;
3603 case IEEE80211_STYPE_AUTH:
8d61ffa5 3604 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
66e67e41
JB		 3605 break;
3606 case IEEE80211_STYPE_DEAUTH:
8d61ffa5 3607 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
66e67e41
JB		 3608 break;
3609 case IEEE80211_STYPE_DISASSOC:
8d61ffa5 3610 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
66e67e41
JB		 3611 break;
3612 case IEEE80211_STYPE_ASSOC_RESP:
3613 case IEEE80211_STYPE_REASSOC_RESP:
8d61ffa5 3614 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
66e67e41
JB		 3615 break;
3616 case IEEE80211_STYPE_ACTION:
37799e52 3617 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
1b3a2e49
JB		 3618 ies_len = skb->len -
3619 offsetof(struct ieee80211_mgmt,
3620 u.action.u.chan_switch.variable);
37799e52
JB		 3621
3622 if (ies_len < 0)
3623 break;
3624
3625 ieee802_11_parse_elems(
3626 mgmt->u.action.u.chan_switch.variable,
b2e506bf 3627 ies_len, true, &elems);
37799e52
JB		 3628
3629 if (elems.parse_error)
3630 break;
3631
1b3a2e49 3632 ieee80211_sta_process_chanswitch(sdata,
2ba45384
LC		 3633 rx_status->mactime,
3634 rx_status->device_timestamp,
3635 &elems, false);
1b3a2e49
JB		 3636 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3637 ies_len = skb->len -
3638 offsetof(struct ieee80211_mgmt,
3639 u.action.u.ext_chan_switch.variable);
3640
3641 if (ies_len < 0)
3642 break;
3643
3644 ieee802_11_parse_elems(
3645 mgmt->u.action.u.ext_chan_switch.variable,
b2e506bf 3646 ies_len, true, &elems);
1b3a2e49
JB		 3647
3648 if (elems.parse_error)
3649 break;
3650
3651 /* for the handling code pretend this was also an IE */
3652 elems.ext_chansw_ie =
3653 &mgmt->u.action.u.ext_chan_switch.data;
3654
66e67e41 3655 ieee80211_sta_process_chanswitch(sdata,
2ba45384
LC		 3656 rx_status->mactime,
3657 rx_status->device_timestamp,
3658 &elems, false);
77fdaa12 3659 }
37799e52 3660 break;
77fdaa12 3661 }
8d61ffa5 3662 sdata_unlock(sdata);
f0706e82
JB		 3663}
3664
9c6bd790 3665static void ieee80211_sta_timer(unsigned long data)
f0706e82 3666{
60f8b39c
JB		 3667 struct ieee80211_sub_if_data *sdata =
3668 (struct ieee80211_sub_if_data *) data;
5bb644a0 3669
9b7d72c1 3670 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
f0706e82
JB		 3671}
3672
04ac3c0e 3673static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
6b684db1 3674 u8 *bssid, u8 reason, bool tx)
04ac3c0e 3675{
6ae16775 3676 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
04ac3c0e 3677
37ad3888 3678 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
6b684db1 3679 tx, frame_buf);
37ad3888 3680
a90faa9d
EG		 3681 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
3682 reason);
04ac3c0e
FF		 3683}
3684
66e67e41
JB		 3685static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
3686{
3687 struct ieee80211_local *local = sdata->local;
3688 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3689 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
1672c0e3 3690 u32 tx_flags = 0;
66e67e41 3691
8d61ffa5 3692 sdata_assert_lock(sdata);
66e67e41
JB		 3693
3694 if (WARN_ON_ONCE(!auth_data))
3695 return -EINVAL;
3696
66e67e41
JB		 3697 auth_data->tries++;
3698
3699 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
bdcbd8e0
JB		 3700 sdata_info(sdata, "authentication with %pM timed out\n",
3701 auth_data->bss->bssid);
66e67e41
JB		 3702
3703 /*
3704 * Most likely AP is not in the range so remove the
3705 * bss struct for that AP.
3706 */
3707 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3708
3709 return -ETIMEDOUT;
3710 }
3711
a1845fc7
JB		 3712 drv_mgd_prepare_tx(local, sdata);
3713
66e67e41 3714 if (auth_data->bss->proberesp_ies) {
6b8ece3a
JM		 3715 u16 trans = 1;
3716 u16 status = 0;
3717
bdcbd8e0
JB		 3718 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3719 auth_data->bss->bssid, auth_data->tries,
3720 IEEE80211_AUTH_MAX_TRIES);
66e67e41
JB		 3721
3722 auth_data->expected_transaction = 2;
6b8ece3a
JM		 3723
3724 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3725 trans = auth_data->sae_trans;
3726 status = auth_data->sae_status;
3727 auth_data->expected_transaction = trans;
3728 }
3729
30686bf7 3730 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
6211dd12
SG		 3731 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3732 IEEE80211_TX_INTFL_MLME_CONN_TX;
3733
6b8ece3a
JM		 3734 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3735 auth_data->data, auth_data->data_len,
66e67e41 3736 auth_data->bss->bssid,
1672c0e3
JB		 3737 auth_data->bss->bssid, NULL, 0, 0,
3738 tx_flags);
66e67e41
JB		 3739 } else {
3740 const u8 *ssidie;
3741
bdcbd8e0
JB		 3742 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
3743 auth_data->bss->bssid, auth_data->tries,
3744 IEEE80211_AUTH_MAX_TRIES);
66e67e41 3745
9caf0364 3746 rcu_read_lock();
66e67e41 3747 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
9caf0364
JB		 3748 if (!ssidie) {
3749 rcu_read_unlock();
66e67e41 3750 return -EINVAL;
9caf0364 3751 }
66e67e41
JB		 3752 /*
3753 * Direct probe is sent to broadcast address as some APs
3754 * will not answer to direct packet in unassociated state.
3755 */
a344d677
JB		 3756 ieee80211_send_probe_req(sdata, sdata->vif.addr, NULL,
3757 ssidie + 2, ssidie[1],
6211dd12 3758 NULL, 0, (u32) -1, true, 0,
55de908a 3759 auth_data->bss->channel, false);
9caf0364 3760 rcu_read_unlock();
66e67e41
JB		 3761 }
3762
6211dd12 3763 if (tx_flags == 0) {
1672c0e3 3764 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
cb236d2d 3765 auth_data->timeout_started = true;
8d61ffa5 3766 run_again(sdata, auth_data->timeout);
89afe614 3767 } else {
cb236d2d
JB		 3768 auth_data->timeout =
3769 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3770 auth_data->timeout_started = true;
3771 run_again(sdata, auth_data->timeout);
1672c0e3 3772 }
66e67e41
JB		 3773
3774 return 0;
3775}
3776
3777static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3778{
3779 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3780 struct ieee80211_local *local = sdata->local;
3781
8d61ffa5 3782 sdata_assert_lock(sdata);
66e67e41 3783
66e67e41
JB		 3784 assoc_data->tries++;
3785 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
bdcbd8e0
JB		 3786 sdata_info(sdata, "association with %pM timed out\n",
3787 assoc_data->bss->bssid);
66e67e41
JB		 3788
3789 /*
3790 * Most likely AP is not in the range so remove the
3791 * bss struct for that AP.
3792 */
3793 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3794
3795 return -ETIMEDOUT;
3796 }
3797
bdcbd8e0
JB		 3798 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3799 assoc_data->bss->bssid, assoc_data->tries,
3800 IEEE80211_ASSOC_MAX_TRIES);
66e67e41
JB		 3801 ieee80211_send_assoc(sdata);
3802
30686bf7 3803 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
1672c0e3 3804 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
89afe614 3805 assoc_data->timeout_started = true;
8d61ffa5 3806 run_again(sdata, assoc_data->timeout);
89afe614 3807 } else {
cb236d2d
JB		 3808 assoc_data->timeout =
3809 round_jiffies_up(jiffies +
3810 IEEE80211_ASSOC_TIMEOUT_LONG);
3811 assoc_data->timeout_started = true;
3812 run_again(sdata, assoc_data->timeout);
1672c0e3 3813 }
66e67e41
JB		 3814
3815 return 0;
3816}
3817
1672c0e3
JB		 3818void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3819 __le16 fc, bool acked)
3820{
3821 struct ieee80211_local *local = sdata->local;
3822
3823 sdata->u.mgd.status_fc = fc;
3824 sdata->u.mgd.status_acked = acked;
3825 sdata->u.mgd.status_received = true;
3826
3827 ieee80211_queue_work(&local->hw, &sdata->work);
3828}
3829
1fa57d01 3830void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 3831{
9c6bd790 3832 struct ieee80211_local *local = sdata->local;
1fa57d01 3833 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 3834
8d61ffa5 3835 sdata_lock(sdata);
77fdaa12 3836
1672c0e3
JB		 3837 if (ifmgd->status_received) {
3838 __le16 fc = ifmgd->status_fc;
3839 bool status_acked = ifmgd->status_acked;
3840
3841 ifmgd->status_received = false;
3842 if (ifmgd->auth_data &&
3843 (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) {
3844 if (status_acked) {
3845 ifmgd->auth_data->timeout =
3846 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
8d61ffa5 3847 run_again(sdata, ifmgd->auth_data->timeout);
1672c0e3
JB		 3848 } else {
3849 ifmgd->auth_data->timeout = jiffies - 1;
3850 }
89afe614 3851 ifmgd->auth_data->timeout_started = true;
1672c0e3
JB		 3852 } else if (ifmgd->assoc_data &&
3853 (ieee80211_is_assoc_req(fc) ||
3854 ieee80211_is_reassoc_req(fc))) {
3855 if (status_acked) {
3856 ifmgd->assoc_data->timeout =
3857 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
8d61ffa5 3858 run_again(sdata, ifmgd->assoc_data->timeout);
1672c0e3
JB		 3859 } else {
3860 ifmgd->assoc_data->timeout = jiffies - 1;
3861 }
89afe614 3862 ifmgd->assoc_data->timeout_started = true;
1672c0e3
JB		 3863 }
3864 }
3865
89afe614 3866 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
66e67e41
JB		 3867 time_after(jiffies, ifmgd->auth_data->timeout)) {
3868 if (ifmgd->auth_data->done) {
3869 /*
3870 * ok ... we waited for assoc but userspace didn't,
3871 * so let's just kill the auth data
3872 */
3873 ieee80211_destroy_auth_data(sdata, false);
3874 } else if (ieee80211_probe_auth(sdata)) {
3875 u8 bssid[ETH_ALEN];
a9409093
EG		 3876 struct ieee80211_event event = {
3877 .type = MLME_EVENT,
3878 .u.mlme.data = AUTH_EVENT,
3879 .u.mlme.status = MLME_TIMEOUT,
3880 };
66e67e41
JB		 3881
3882 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3883
3884 ieee80211_destroy_auth_data(sdata, false);
3885
6ff57cf8 3886 cfg80211_auth_timeout(sdata->dev, bssid);
a9409093 3887 drv_event_callback(sdata->local, sdata, &event);
66e67e41 3888 }
89afe614 3889 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
8d61ffa5 3890 run_again(sdata, ifmgd->auth_data->timeout);
66e67e41 3891
89afe614 3892 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
66e67e41 3893 time_after(jiffies, ifmgd->assoc_data->timeout)) {
989c6505 3894 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
66e67e41 3895 ieee80211_do_assoc(sdata)) {
959867fa 3896 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
d0d1a12f
EG		 3897 struct ieee80211_event event = {
3898 .type = MLME_EVENT,
3899 .u.mlme.data = ASSOC_EVENT,
3900 .u.mlme.status = MLME_TIMEOUT,
3901 };
66e67e41
JB		 3902
3903 ieee80211_destroy_assoc_data(sdata, false);
959867fa 3904 cfg80211_assoc_timeout(sdata->dev, bss);
d0d1a12f 3905 drv_event_callback(sdata->local, sdata, &event);
66e67e41 3906 }
89afe614 3907 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
8d61ffa5 3908 run_again(sdata, ifmgd->assoc_data->timeout);
66e67e41 3909
392b9ffb 3910 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
b291ba11 3911 ifmgd->associated) {
a43abf29 3912 u8 bssid[ETH_ALEN];
72a8a3ed 3913 int max_tries;
a43abf29 3914
0c1ad2ca 3915 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 3916
30686bf7 3917 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
180205bd 3918 max_tries = max_nullfunc_tries;
72a8a3ed 3919 else
180205bd 3920 max_tries = max_probe_tries;
72a8a3ed 3921
4e5ff376
FF		 3922 /* ACK received for nullfunc probing frame */
3923 if (!ifmgd->probe_send_count)
3924 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 3925 else if (ifmgd->nullfunc_failed) {
3926 if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3927 mlme_dbg(sdata,
3928 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3929 bssid, ifmgd->probe_send_count,
3930 max_tries);
04ac3c0e
FF		 3931 ieee80211_mgd_probe_ap_send(sdata);
3932 } else {
bdcbd8e0
JB		 3933 mlme_dbg(sdata,
3934 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3935 bssid);
95acac61 3936 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1
JB		 3937 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3938 false);
04ac3c0e
FF		 3939 }
3940 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
8d61ffa5 3941 run_again(sdata, ifmgd->probe_timeout);
30686bf7 3942 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
bdcbd8e0
JB		 3943 mlme_dbg(sdata,
3944 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3945 bssid, probe_wait_ms);
95acac61 3946 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 3947 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
04ac3c0e 3948 } else if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3949 mlme_dbg(sdata,
3950 "No probe response from AP %pM after %dms, try %d/%i\n",
3951 bssid, probe_wait_ms,
3952 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 3953 ieee80211_mgd_probe_ap_send(sdata);
3954 } else {
b291ba11
JB		 3955 /*
3956 * We actually lost the connection ... or did we?
3957 * Let's make sure!
3958 */
b38afa87
BG		 3959 wiphy_debug(local->hw.wiphy,
3960 "%s: No probe response from AP %pM"
3961 " after %dms, disconnecting.\n",
3962 sdata->name,
180205bd 3963 bssid, probe_wait_ms);
04ac3c0e 3964
95acac61 3965 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 3966 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
b291ba11
JB		 3967 }
3968 }
3969
8d61ffa5 3970 sdata_unlock(sdata);
f0706e82
JB		 3971}
3972
b291ba11
JB		 3973static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3974{
3975 struct ieee80211_sub_if_data *sdata =
3976 (struct ieee80211_sub_if_data *) data;
0c21e632 3977 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 3978
0c21e632 3979 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
e5593f56
MK		 3980 return;
3981
682bd38b 3982 sdata->u.mgd.connection_loss = false;
1e4dcd01
JO		 3983 ieee80211_queue_work(&sdata->local->hw,
3984 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 3985}
3986
3987static void ieee80211_sta_conn_mon_timer(unsigned long data)
3988{
3989 struct ieee80211_sub_if_data *sdata =
3990 (struct ieee80211_sub_if_data *) data;
3991 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3992 struct ieee80211_local *local = sdata->local;
3993
0c21e632 3994 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
e5593f56
MK		 3995 return;
3996
42935eca 3997 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 3998}
3999
4000static void ieee80211_sta_monitor_work(struct work_struct *work)
4001{
4002 struct ieee80211_sub_if_data *sdata =
4003 container_of(work, struct ieee80211_sub_if_data,
4004 u.mgd.monitor_work);
4005
4006 ieee80211_mgd_probe_ap(sdata, false);
4007}
4008
9c6bd790
JB		 4009static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
4010{
ad935687 4011 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
925e64c3 4012 __ieee80211_stop_poll(sdata);
ad935687 4013
b291ba11 4014 /* let's probe the connection once */
30686bf7 4015 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
494f1fe5
EP		 4016 ieee80211_queue_work(&sdata->local->hw,
4017 &sdata->u.mgd.monitor_work);
b291ba11 4018 /* and do all the other regular work too */
64592c8f 4019 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 4020 }
9c6bd790 4021}
f0706e82 4022
b8360ab8 4023#ifdef CONFIG_PM
1a1cb744
JB		 4024void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
4025{
4026 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4027 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4028
4029 sdata_lock(sdata);
4030
c52666ae
EG		 4031 if (ifmgd->auth_data || ifmgd->assoc_data) {
4032 const u8 *bssid = ifmgd->auth_data ?
4033 ifmgd->auth_data->bss->bssid :
4034 ifmgd->assoc_data->bss->bssid;
4035
1a1cb744 4036 /*
c52666ae
EG		 4037 * If we are trying to authenticate / associate while suspending,
4038 * cfg80211 won't know and won't actually abort those attempts,
4039 * thus we need to do that ourselves.
1a1cb744 4040 */
c52666ae 4041 ieee80211_send_deauth_disassoc(sdata, bssid,
1a1cb744
JB		 4042 IEEE80211_STYPE_DEAUTH,
4043 WLAN_REASON_DEAUTH_LEAVING,
4044 false, frame_buf);
c52666ae
EG		 4045 if (ifmgd->assoc_data)
4046 ieee80211_destroy_assoc_data(sdata, false);
4047 if (ifmgd->auth_data)
4048 ieee80211_destroy_auth_data(sdata, false);
1a1cb744
JB		 4049 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4050 IEEE80211_DEAUTH_FRAME_LEN);
4051 }
4052
be72afe0
JB		 4053 /* This is a bit of a hack - we should find a better and more generic
4054 * solution to this. Normally when suspending, cfg80211 will in fact
4055 * deauthenticate. However, it doesn't (and cannot) stop an ongoing
4056 * auth (not so important) or assoc (this is the problem) process.
4057 *
4058 * As a consequence, it can happen that we are in the process of both
4059 * associating and suspending, and receive an association response
4060 * after cfg80211 has checked if it needs to disconnect, but before
4061 * we actually set the flag to drop incoming frames. This will then
4062 * cause the workqueue flush to process the association response in
4063 * the suspend, resulting in a successful association just before it
4064 * tries to remove the interface from the driver, which now though
4065 * has a channel context assigned ... this results in issues.
4066 *
4067 * To work around this (for now) simply deauth here again if we're
4068 * now connected.
4069 */
4070 if (ifmgd->associated && !sdata->local->wowlan) {
4071 u8 bssid[ETH_ALEN];
4072 struct cfg80211_deauth_request req = {
4073 .reason_code = WLAN_REASON_DEAUTH_LEAVING,
4074 .bssid = bssid,
4075 };
4076
4077 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4078 ieee80211_mgd_deauth(sdata, &req);
4079 }
4080
1a1cb744
JB		 4081 sdata_unlock(sdata);
4082}
4083
b8360ab8
JB		 4084void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
4085{
4086 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4087
8d61ffa5 4088 sdata_lock(sdata);
b8360ab8 4089 if (!ifmgd->associated) {
8d61ffa5 4090 sdata_unlock(sdata);
b8360ab8
JB		 4091 return;
4092 }
4093
4094 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
4095 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
4096 mlme_dbg(sdata, "driver requested disconnect after resume\n");
4097 ieee80211_sta_connection_lost(sdata,
4098 ifmgd->associated->bssid,
4099 WLAN_REASON_UNSPECIFIED,
4100 true);
8d61ffa5 4101 sdata_unlock(sdata);
b8360ab8
JB		 4102 return;
4103 }
8d61ffa5 4104 sdata_unlock(sdata);
b8360ab8
JB		 4105}
4106#endif
4107
9c6bd790
JB		 4108/* interface setup */
4109void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 4110{
46900298 4111 struct ieee80211_if_managed *ifmgd;
988c0f72 4112
46900298 4113 ifmgd = &sdata->u.mgd;
b291ba11 4114 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 4115 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 4116 INIT_WORK(&ifmgd->beacon_connection_loss_work,
4117 ieee80211_beacon_connection_loss_work);
882a7c69
JB		 4118 INIT_WORK(&ifmgd->csa_connection_drop_work,
4119 ieee80211_csa_connection_drop_work);
687da132 4120 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
81dd2b88
AN		 4121 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
4122 ieee80211_tdls_peer_del_work);
46900298 4123 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 4124 (unsigned long) sdata);
b291ba11
JB		 4125 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
4126 (unsigned long) sdata);
4127 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
4128 (unsigned long) sdata);
46900298 4129 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 4130 (unsigned long) sdata);
02219b3a
JB		 4131 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
4132 ieee80211_sta_handle_tspec_ac_params_wk);
9c6bd790 4133
ab1faead 4134 ifmgd->flags = 0;
1478acb3 4135 ifmgd->powersave = sdata->wdev.ps;
219c3867
AB		 4136 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
4137 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
67baf663 4138 ifmgd->p2p_noa_index = -1;
bbbdff9e 4139
0d8614b4 4140 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
0f78231b
JB		 4141 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
4142 else
4143 ifmgd->req_smps = IEEE80211_SMPS_OFF;
1277b4a9
LK		 4144
4145 /* Setup TDLS data */
4146 spin_lock_init(&ifmgd->teardown_lock);
4147 ifmgd->teardown_skb = NULL;
4148 ifmgd->orig_teardown_skb = NULL;
f0706e82
JB		 4149}
4150
77fdaa12
JB		 4151/* scan finished notification */
4152void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 4153{
31ee67a1 4154 struct ieee80211_sub_if_data *sdata;
60f8b39c 4155
77fdaa12
JB		 4156 /* Restart STA timers */
4157 rcu_read_lock();
370bd005
BG		 4158 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4159 if (ieee80211_sdata_running(sdata))
4160 ieee80211_restart_sta_timer(sdata);
4161 }
77fdaa12
JB		 4162 rcu_read_unlock();
4163}
60f8b39c 4164
77fdaa12
JB		 4165int ieee80211_max_network_latency(struct notifier_block *nb,
4166 unsigned long data, void *dummy)
4167{
4168 s32 latency_usec = (s32) data;
4169 struct ieee80211_local *local =
4170 container_of(nb, struct ieee80211_local,
4171 network_latency_notifier);
1fa6f4af 4172
77fdaa12
JB		 4173 mutex_lock(&local->iflist_mtx);
4174 ieee80211_recalc_ps(local, latency_usec);
4175 mutex_unlock(&local->iflist_mtx);
dfe67012 4176
8bd811aa 4177 return NOTIFY_OK;
9c6bd790
JB		 4178}
4179
f2d9d270
JB		 4180static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
4181 struct cfg80211_bss *cbss)
4182{
4183 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4184 const u8 *ht_cap_ie, *vht_cap_ie;
4185 const struct ieee80211_ht_cap *ht_cap;
4186 const struct ieee80211_vht_cap *vht_cap;
4187 u8 chains = 1;
4188
4189 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
4190 return chains;
4191
9caf0364 4192 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
f2d9d270
JB		 4193 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
4194 ht_cap = (void *)(ht_cap_ie + 2);
4195 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4196 /*
4197 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4198 * "Tx Unequal Modulation Supported" fields.
4199 */
4200 }
4201
4202 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
4203 return chains;
4204
9caf0364 4205 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
f2d9d270
JB		 4206 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
4207 u8 nss;
4208 u16 tx_mcs_map;
4209
4210 vht_cap = (void *)(vht_cap_ie + 2);
4211 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4212 for (nss = 8; nss > 0; nss--) {
4213 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4214 IEEE80211_VHT_MCS_NOT_SUPPORTED)
4215 break;
4216 }
4217 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4218 chains = max(chains, nss);
4219 }
4220
4221 return chains;
4222}
4223
b17166a7
JB		 4224static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4225 struct cfg80211_bss *cbss)
a1cf775d
JB		 4226{
4227 struct ieee80211_local *local = sdata->local;
4228 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
53b954ee 4229 const struct ieee80211_ht_cap *ht_cap = NULL;
24398e39 4230 const struct ieee80211_ht_operation *ht_oper = NULL;
f2d9d270 4231 const struct ieee80211_vht_operation *vht_oper = NULL;
24398e39 4232 struct ieee80211_supported_band *sband;
4bf88530 4233 struct cfg80211_chan_def chandef;
f2d9d270 4234 int ret;
a1cf775d 4235
24398e39
JB		 4236 sband = local->hw.wiphy->bands[cbss->channel->band];
4237
f2d9d270
JB		 4238 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
4239 IEEE80211_STA_DISABLE_80P80MHZ |
4240 IEEE80211_STA_DISABLE_160MHZ);
4241
9caf0364
JB		 4242 rcu_read_lock();
4243
f2d9d270
JB		 4244 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
4245 sband->ht_cap.ht_supported) {
53b954ee 4246 const u8 *ht_oper_ie, *ht_cap_ie;
24398e39 4247
9caf0364 4248 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
24398e39
JB		 4249 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
4250 ht_oper = (void *)(ht_oper_ie + 2);
08e6effa 4251
53b954ee
EP		 4252 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4253 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
4254 ht_cap = (void *)(ht_cap_ie + 2);
4255
4256 if (!ht_cap) {
08e6effa
JB		 4257 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4258 ht_oper = NULL;
4259 }
24398e39
JB		 4260 }
4261
f2d9d270
JB		 4262 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4263 sband->vht_cap.vht_supported) {
08e6effa 4264 const u8 *vht_oper_ie, *vht_cap;
f2d9d270 4265
9caf0364
JB		 4266 vht_oper_ie = ieee80211_bss_get_ie(cbss,
4267 WLAN_EID_VHT_OPERATION);
f2d9d270
JB		 4268 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
4269 vht_oper = (void *)(vht_oper_ie + 2);
4270 if (vht_oper && !ht_oper) {
4271 vht_oper = NULL;
bdcbd8e0 4272 sdata_info(sdata,
f2d9d270 4273 "AP advertised VHT without HT, disabling both\n");
cb145022
JB		 4274 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4275 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
24398e39 4276 }
08e6effa
JB		 4277
4278 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4279 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
4280 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4281 vht_oper = NULL;
4282 }
24398e39
JB		 4283 }
4284
f2d9d270
JB		 4285 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
4286 cbss->channel,
53b954ee 4287 ht_cap, ht_oper, vht_oper,
5cdaed1e 4288 &chandef, false);
04ecd257 4289
f2d9d270
JB		 4290 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
4291 local->rx_chains);
24398e39 4292
9caf0364
JB		 4293 rcu_read_unlock();
4294
04ecd257
JB		 4295 /* will change later if needed */
4296 sdata->smps_mode = IEEE80211_SMPS_OFF;
4297
34a3740d 4298 mutex_lock(&local->mtx);
f2d9d270
JB		 4299 /*
4300 * If this fails (possibly due to channel context sharing
4301 * on incompatible channels, e.g. 80+80 and 160 sharing the
4302 * same control channel) try to use a smaller bandwidth.
4303 */
4304 ret = ieee80211_vif_use_channel(sdata, &chandef,
4305 IEEE80211_CHANCTX_SHARED);
0418a445
SW		 4306
4307 /* don't downgrade for 5 and 10 MHz channels, though. */
4308 if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4309 chandef.width == NL80211_CHAN_WIDTH_10)
34a3740d 4310 goto out;
0418a445 4311
d601cd8d 4312 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
e6b7cde4 4313 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
d601cd8d
JB		 4314 ret = ieee80211_vif_use_channel(sdata, &chandef,
4315 IEEE80211_CHANCTX_SHARED);
4316 }
34a3740d
JB		 4317 out:
4318 mutex_unlock(&local->mtx);
f2d9d270 4319 return ret;
b17166a7
JB		 4320}
4321
4322static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
c1041f10
CRI		 4323 struct cfg80211_bss *cbss, bool assoc,
4324 bool override)
b17166a7
JB		 4325{
4326 struct ieee80211_local *local = sdata->local;
4327 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4328 struct ieee80211_bss *bss = (void *)cbss->priv;
4329 struct sta_info *new_sta = NULL;
179b8fc7 4330 struct ieee80211_supported_band *sband;
c1041f10 4331 bool have_sta = false;
b17166a7
JB		 4332 int err;
4333
179b8fc7
CRI		 4334 sband = local->hw.wiphy->bands[cbss->channel->band];
4335
b17166a7
JB		 4336 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
4337 return -EINVAL;
4338
4339 if (assoc) {
4340 rcu_read_lock();
4341 have_sta = sta_info_get(sdata, cbss->bssid);
4342 rcu_read_unlock();
4343 }
4344
4345 if (!have_sta) {
4346 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4347 if (!new_sta)
4348 return -ENOMEM;
4349 }
179b8fc7 4350
c1041f10 4351 if (new_sta || override) {
179b8fc7
CRI		 4352 err = ieee80211_prep_channel(sdata, cbss);
4353 if (err) {
4354 if (new_sta)
4355 sta_info_free(local, new_sta);
4356 return -EINVAL;
4357 }
4358 }
4359
13e0c8e3 4360 if (new_sta) {
5d6a1b06
JB		 4361 u32 rates = 0, basic_rates = 0;
4362 bool have_higher_than_11mbit;
4363 int min_rate = INT_MAX, min_rate_index = -1;
2103dec1 4364 struct ieee80211_chanctx_conf *chanctx_conf;
8cef2c9d 4365 const struct cfg80211_bss_ies *ies;
179b8fc7 4366 int shift = ieee80211_vif_get_shift(&sdata->vif);
2103dec1 4367 u32 rate_flags;
b17166a7 4368
2103dec1
SW		 4369 rcu_read_lock();
4370 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4371 if (WARN_ON(!chanctx_conf)) {
4372 rcu_read_unlock();
c368ddaa 4373 sta_info_free(local, new_sta);
2103dec1
SW		 4374 return -EINVAL;
4375 }
4376 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
4377 rcu_read_unlock();
5d6a1b06 4378
5d6a1b06
JB		 4379 ieee80211_get_rates(sband, bss->supp_rates,
4380 bss->supp_rates_len,
4381 &rates, &basic_rates,
4382 &have_higher_than_11mbit,
2103dec1
SW		 4383 &min_rate, &min_rate_index,
4384 shift, rate_flags);
5d6a1b06
JB		 4385
4386 /*
4387 * This used to be a workaround for basic rates missing
4388 * in the association response frame. Now that we no
4389 * longer use the basic rates from there, it probably
4390 * doesn't happen any more, but keep the workaround so
4391 * in case some *other* APs are buggy in different ways
4392 * we can connect -- with a warning.
4393 */
4394 if (!basic_rates && min_rate_index >= 0) {
bdcbd8e0
JB		 4395 sdata_info(sdata,
4396 "No basic rates, using min rate instead\n");
5d6a1b06
JB		 4397 basic_rates = BIT(min_rate_index);
4398 }
4399
13e0c8e3 4400 new_sta->sta.supp_rates[cbss->channel->band] = rates;
5d6a1b06
JB		 4401 sdata->vif.bss_conf.basic_rates = basic_rates;
4402
4403 /* cf. IEEE 802.11 9.2.12 */
55de908a 4404 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
5d6a1b06
JB		 4405 have_higher_than_11mbit)
4406 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
4407 else
4408 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
4409
4410 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
4411
8c358bcd
JB		 4412 /* set timing information */
4413 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
8cef2c9d 4414 rcu_read_lock();
ef429dad
JB		 4415 ies = rcu_dereference(cbss->beacon_ies);
4416 if (ies) {
4417 const u8 *tim_ie;
4418
4419 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4420 sdata->vif.bss_conf.sync_device_ts =
4421 bss->device_ts_beacon;
4422 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4423 ies->data, ies->len);
4424 if (tim_ie && tim_ie[1] >= 2)
4425 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
4426 else
4427 sdata->vif.bss_conf.sync_dtim_count = 0;
30686bf7
JB		 4428 } else if (!ieee80211_hw_check(&sdata->local->hw,
4429 TIMING_BEACON_ONLY)) {
ef429dad
JB		 4430 ies = rcu_dereference(cbss->proberesp_ies);
4431 /* must be non-NULL since beacon IEs were NULL */
4432 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4433 sdata->vif.bss_conf.sync_device_ts =
4434 bss->device_ts_presp;
4435 sdata->vif.bss_conf.sync_dtim_count = 0;
4436 } else {
4437 sdata->vif.bss_conf.sync_tsf = 0;
4438 sdata->vif.bss_conf.sync_device_ts = 0;
4439 sdata->vif.bss_conf.sync_dtim_count = 0;
4440 }
8cef2c9d 4441 rcu_read_unlock();
8c358bcd
JB		 4442
4443 /* tell driver about BSSID, basic rates and timing */
5d6a1b06 4444 ieee80211_bss_info_change_notify(sdata,
8c358bcd
JB		 4445 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4446 BSS_CHANGED_BEACON_INT);
a1cf775d
JB		 4447
4448 if (assoc)
13e0c8e3 4449 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
a1cf775d 4450
13e0c8e3
JB		 4451 err = sta_info_insert(new_sta);
4452 new_sta = NULL;
a1cf775d 4453 if (err) {
bdcbd8e0
JB		 4454 sdata_info(sdata,
4455 "failed to insert STA entry for the AP (error %d)\n",
4456 err);
a1cf775d
JB		 4457 return err;
4458 }
4459 } else
b203ca39 4460 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
a1cf775d 4461
7d830a19
DS		 4462 /* Cancel scan to ensure that nothing interferes with connection */
4463 if (local->scanning)
4464 ieee80211_scan_cancel(local);
4465
a1cf775d
JB		 4466 return 0;
4467}
4468
77fdaa12
JB		 4469/* config hooks */
4470int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4471 struct cfg80211_auth_request *req)
9c6bd790 4472{
66e67e41
JB		 4473 struct ieee80211_local *local = sdata->local;
4474 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4475 struct ieee80211_mgd_auth_data *auth_data;
77fdaa12 4476 u16 auth_alg;
66e67e41
JB		 4477 int err;
4478
4479 /* prepare auth data structure */
9c6bd790 4480
77fdaa12
JB		 4481 switch (req->auth_type) {
4482 case NL80211_AUTHTYPE_OPEN_SYSTEM:
4483 auth_alg = WLAN_AUTH_OPEN;
4484 break;
4485 case NL80211_AUTHTYPE_SHARED_KEY:
66e67e41 4486 if (IS_ERR(local->wep_tx_tfm))
9dca9c49 4487 return -EOPNOTSUPP;
77fdaa12
JB		 4488 auth_alg = WLAN_AUTH_SHARED_KEY;
4489 break;
4490 case NL80211_AUTHTYPE_FT:
4491 auth_alg = WLAN_AUTH_FT;
4492 break;
4493 case NL80211_AUTHTYPE_NETWORK_EAP:
4494 auth_alg = WLAN_AUTH_LEAP;
4495 break;
6b8ece3a
JM		 4496 case NL80211_AUTHTYPE_SAE:
4497 auth_alg = WLAN_AUTH_SAE;
4498 break;
77fdaa12
JB		 4499 default:
4500 return -EOPNOTSUPP;
60f8b39c 4501 }
77fdaa12 4502
6b8ece3a
JM		 4503 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
4504 req->ie_len, GFP_KERNEL);
66e67e41 4505 if (!auth_data)
9c6bd790 4506 return -ENOMEM;
77fdaa12 4507
66e67e41 4508 auth_data->bss = req->bss;
77fdaa12 4509
6b8ece3a
JM		 4510 if (req->sae_data_len >= 4) {
4511 __le16 *pos = (__le16 *) req->sae_data;
4512 auth_data->sae_trans = le16_to_cpu(pos[0]);
4513 auth_data->sae_status = le16_to_cpu(pos[1]);
4514 memcpy(auth_data->data, req->sae_data + 4,
4515 req->sae_data_len - 4);
4516 auth_data->data_len += req->sae_data_len - 4;
4517 }
4518
77fdaa12 4519 if (req->ie && req->ie_len) {
6b8ece3a
JM		 4520 memcpy(&auth_data->data[auth_data->data_len],
4521 req->ie, req->ie_len);
4522 auth_data->data_len += req->ie_len;
9c6bd790 4523 }
77fdaa12 4524
fffd0934 4525 if (req->key && req->key_len) {
66e67e41
JB		 4526 auth_data->key_len = req->key_len;
4527 auth_data->key_idx = req->key_idx;
4528 memcpy(auth_data->key, req->key, req->key_len);
fffd0934
JB		 4529 }
4530
66e67e41 4531 auth_data->algorithm = auth_alg;
60f8b39c 4532
66e67e41 4533 /* try to authenticate/probe */
2a33bee2 4534
66e67e41
JB		 4535 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4536 ifmgd->assoc_data) {
4537 err = -EBUSY;
4538 goto err_free;
2a33bee2
GE		 4539 }
4540
66e67e41
JB		 4541 if (ifmgd->auth_data)
4542 ieee80211_destroy_auth_data(sdata, false);
2a33bee2 4543
66e67e41
JB		 4544 /* prep auth_data so we don't go into idle on disassoc */
4545 ifmgd->auth_data = auth_data;
af6b6374 4546
7b119dc0
JB		 4547 if (ifmgd->associated) {
4548 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4549
4550 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4551 WLAN_REASON_UNSPECIFIED,
4552 false, frame_buf);
4553
a90faa9d
EG		 4554 ieee80211_report_disconnect(sdata, frame_buf,
4555 sizeof(frame_buf), true,
4556 WLAN_REASON_UNSPECIFIED);
7b119dc0 4557 }
af6b6374 4558
bdcbd8e0 4559 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
e5b900d2 4560
c1041f10 4561 err = ieee80211_prep_connection(sdata, req->bss, false, false);
a1cf775d 4562 if (err)
66e67e41 4563 goto err_clear;
af6b6374 4564
66e67e41
JB		 4565 err = ieee80211_probe_auth(sdata);
4566 if (err) {
66e67e41
JB		 4567 sta_info_destroy_addr(sdata, req->bss->bssid);
4568 goto err_clear;
4569 }
4570
4571 /* hold our own reference */
5b112d3d 4572 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
8d61ffa5 4573 return 0;
66e67e41
JB		 4574
4575 err_clear:
c84a67a2 4576 eth_zero_addr(ifmgd->bssid);
3d2abdfd 4577 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41 4578 ifmgd->auth_data = NULL;
d01f858c
MK		 4579 mutex_lock(&sdata->local->mtx);
4580 ieee80211_vif_release_channel(sdata);
4581 mutex_unlock(&sdata->local->mtx);
66e67e41
JB		 4582 err_free:
4583 kfree(auth_data);
66e67e41 4584 return err;
af6b6374
JB		 4585}
4586
095d81ce
JB		 4587static bool ieee80211_usable_wmm_params(struct ieee80211_sub_if_data *sdata,
4588 const u8 *wmm_param, int len)
4589{
4590 const u8 *pos;
4591 size_t left;
4592
4593 if (len < 8)
4594 return false;
4595
4596 if (wmm_param[5] != 1 /* version */)
4597 return false;
4598
4599 pos = wmm_param + 8;
4600 left = len - 8;
4601
4602 for (; left >= 4; left -= 4, pos += 4) {
4603 u8 aifsn = pos[0] & 0x0f;
4604 u8 ecwmin = pos[1] & 0x0f;
4605 u8 ecwmax = (pos[1] & 0xf0) >> 4;
4606 int aci = (pos[0] >> 5) & 0x03;
4607
4608 if (aifsn < 2) {
4609 sdata_info(sdata,
4610 "AP has invalid WMM params (AIFSN=%d for ACI %d), disabling WMM\n",
4611 aifsn, aci);
4612 return false;
4613 }
4614 if (ecwmin > ecwmax) {
4615 sdata_info(sdata,
4616 "AP has invalid WMM params (ECWmin/max=%d/%d for ACI %d), disabling WMM\n",
4617 ecwmin, ecwmax, aci);
4618 return false;
4619 }
4620 }
4621
4622 return true;
4623}
4624
77fdaa12
JB		 4625int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4626 struct cfg80211_assoc_request *req)
f0706e82 4627{
66e67e41 4628 struct ieee80211_local *local = sdata->local;
77fdaa12 4629 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 4630 struct ieee80211_bss *bss = (void *)req->bss->priv;
66e67e41 4631 struct ieee80211_mgd_assoc_data *assoc_data;
c65dd147 4632 const struct cfg80211_bss_ies *beacon_ies;
4e74bfdb 4633 struct ieee80211_supported_band *sband;
b08fbbd8 4634 const u8 *ssidie, *ht_ie, *vht_ie;
2a33bee2 4635 int i, err;
c1041f10 4636 bool override = false;
f0706e82 4637
66e67e41
JB		 4638 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4639 if (!assoc_data)
4640 return -ENOMEM;
4641
9caf0364
JB		 4642 rcu_read_lock();
4643 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4644 if (!ssidie) {
4645 rcu_read_unlock();
4646 kfree(assoc_data);
4647 return -EINVAL;
4648 }
4649 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4650 assoc_data->ssid_len = ssidie[1];
4651 rcu_read_unlock();
4652
7b119dc0
JB		 4653 if (ifmgd->associated) {
4654 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4655
4656 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4657 WLAN_REASON_UNSPECIFIED,
4658 false, frame_buf);
4659
a90faa9d
EG		 4660 ieee80211_report_disconnect(sdata, frame_buf,
4661 sizeof(frame_buf), true,
4662 WLAN_REASON_UNSPECIFIED);
7b119dc0 4663 }
66e67e41
JB		 4664
4665 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4666 err = -EBUSY;
4667 goto err_free;
af6b6374 4668 }
77fdaa12 4669
66e67e41
JB		 4670 if (ifmgd->assoc_data) {
4671 err = -EBUSY;
4672 goto err_free;
4673 }
77fdaa12 4674
66e67e41
JB		 4675 if (ifmgd->auth_data) {
4676 bool match;
4677
4678 /* keep sta info, bssid if matching */
b203ca39 4679 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
66e67e41 4680 ieee80211_destroy_auth_data(sdata, match);
2a33bee2
GE		 4681 }
4682
66e67e41 4683 /* prepare assoc data */
095d81ce 4684
d8ec4433
JO		 4685 ifmgd->beacon_crc_valid = false;
4686
095d81ce
JB		 4687 assoc_data->wmm = bss->wmm_used &&
4688 (local->hw.queues >= IEEE80211_NUM_ACS);
4689 if (assoc_data->wmm) {
4690 /* try to check validity of WMM params IE */
4691 const struct cfg80211_bss_ies *ies;
4692 const u8 *wp, *start, *end;
4693
4694 rcu_read_lock();
4695 ies = rcu_dereference(req->bss->ies);
4696 start = ies->data;
4697 end = start + ies->len;
4698
4699 while (true) {
4700 wp = cfg80211_find_vendor_ie(
4701 WLAN_OUI_MICROSOFT,
4702 WLAN_OUI_TYPE_MICROSOFT_WMM,
4703 start, end - start);
4704 if (!wp)
4705 break;
4706 start = wp + wp[1] + 2;
4707 /* if this IE is too short, try the next */
4708 if (wp[1] <= 4)
4709 continue;
4710 /* if this IE is WMM params, we found what we wanted */
4711 if (wp[6] == 1)
4712 break;
4713 }
4714
4715 if (!wp || !ieee80211_usable_wmm_params(sdata, wp + 2,
4716 wp[1] - 2)) {
4717 assoc_data->wmm = false;
4718 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
4719 }
4720 rcu_read_unlock();
4721 }
4722
de5036aa
JB		 4723 /*
4724 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4725 * We still associate in non-HT mode (11a/b/g) if any one of these
4726 * ciphers is configured as pairwise.
4727 * We can set this to true for non-11n hardware, that'll be checked
4728 * separately along with the peer capabilities.
4729 */
1c4cb928 4730 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
77fdaa12
JB		 4731 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4732 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
1c4cb928 4733 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
a8243b72 4734 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
d545daba 4735 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
1c4cb928 4736 netdev_info(sdata->dev,
d545daba 4737 "disabling HT/VHT due to WEP/TKIP use\n");
1c4cb928
JB		 4738 }
4739 }
77fdaa12 4740
4e74bfdb
JB		 4741 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4742 sband = local->hw.wiphy->bands[req->bss->channel->band];
4743 if (!sband->ht_cap.ht_supported ||
095d81ce
JB		 4744 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4745 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
a8243b72 4746 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
095d81ce
JB		 4747 if (!bss->wmm_used &&
4748 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
1b49de26
JB		 4749 netdev_info(sdata->dev,
4750 "disabling HT as WMM/QoS is not supported by the AP\n");
1c4cb928 4751 }
4e74bfdb 4752
d545daba
MP		 4753 /* disable VHT if we don't support it or the AP doesn't use WMM */
4754 if (!sband->vht_cap.vht_supported ||
095d81ce
JB		 4755 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4756 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
d545daba 4757 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
095d81ce
JB		 4758 if (!bss->wmm_used &&
4759 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
1b49de26
JB		 4760 netdev_info(sdata->dev,
4761 "disabling VHT as WMM/QoS is not supported by the AP\n");
d545daba
MP		 4762 }
4763
ef96a842
BG		 4764 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4765 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4766 sizeof(ifmgd->ht_capa_mask));
4767
dd5ecfea
JB		 4768 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4769 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4770 sizeof(ifmgd->vht_capa_mask));
4771
77fdaa12 4772 if (req->ie && req->ie_len) {
66e67e41
JB		 4773 memcpy(assoc_data->ie, req->ie, req->ie_len);
4774 assoc_data->ie_len = req->ie_len;
4775 }
f679f65d 4776
66e67e41 4777 assoc_data->bss = req->bss;
f679f65d 4778
af6b6374
JB		 4779 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4780 if (ifmgd->powersave)
04ecd257 4781 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
af6b6374 4782 else
04ecd257 4783 sdata->smps_mode = IEEE80211_SMPS_OFF;
af6b6374 4784 } else
04ecd257 4785 sdata->smps_mode = ifmgd->req_smps;
af6b6374 4786
66e67e41 4787 assoc_data->capability = req->bss->capability;
66e67e41
JB		 4788 assoc_data->supp_rates = bss->supp_rates;
4789 assoc_data->supp_rates_len = bss->supp_rates_len;
9dde6423 4790
9caf0364 4791 rcu_read_lock();
9dde6423
JB		 4792 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4793 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4794 assoc_data->ap_ht_param =
4795 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4796 else
a8243b72 4797 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
b08fbbd8
JB		 4798 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4799 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4800 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4801 sizeof(struct ieee80211_vht_cap));
4802 else
4803 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
9caf0364 4804 rcu_read_unlock();
63f170e0 4805
848955cc 4806 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
30686bf7 4807 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK),
848955cc
JB		 4808 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
4809 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
4810
ab13315a 4811 if (bss->wmm_used && bss->uapsd_supported &&
848955cc 4812 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
76f0303d 4813 assoc_data->uapsd = true;
ab13315a
KV		 4814 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4815 } else {
76f0303d 4816 assoc_data->uapsd = false;
ab13315a
KV		 4817 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4818 }
4819
77fdaa12 4820 if (req->prev_bssid)
66e67e41 4821 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12
JB		 4822
4823 if (req->use_mfp) {
4824 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4825 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4826 } else {
4827 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4828 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4829 }
4830
cd2f5dd7
AK		 4831 if (req->flags & ASSOC_REQ_USE_RRM)
4832 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
4833 else
4834 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
4835
77fdaa12
JB		 4836 if (req->crypto.control_port)
4837 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4838 else
4839 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4840
a621fa4d
JB		 4841 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4842 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
2475b1cc
MS		 4843 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
4844 sdata->vif.type);
a621fa4d 4845
66e67e41
JB		 4846 /* kick off associate process */
4847
4848 ifmgd->assoc_data = assoc_data;
826262c3 4849 ifmgd->dtim_period = 0;
989c6505 4850 ifmgd->have_beacon = false;
66e67e41 4851
c1041f10
CRI		 4852 /* override HT/VHT configuration only if the AP and we support it */
4853 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
4854 struct ieee80211_sta_ht_cap sta_ht_cap;
4855
4856 if (req->flags & ASSOC_REQ_DISABLE_HT)
4857 override = true;
4858
4859 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
4860 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
4861
4862 /* check for 40 MHz disable override */
4863 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) &&
4864 sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
4865 !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
4866 override = true;
4867
4868 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4869 req->flags & ASSOC_REQ_DISABLE_VHT)
4870 override = true;
4871 }
4872
4873 if (req->flags & ASSOC_REQ_DISABLE_HT) {
4874 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4875 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4876 }
4877
4878 if (req->flags & ASSOC_REQ_DISABLE_VHT)
4879 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4880
4881 err = ieee80211_prep_connection(sdata, req->bss, true, override);
a1cf775d
JB		 4882 if (err)
4883 goto err_clear;
66e67e41 4884
c65dd147
EG		 4885 rcu_read_lock();
4886 beacon_ies = rcu_dereference(req->bss->beacon_ies);
826262c3 4887
30686bf7 4888 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) &&
c65dd147
EG		 4889 !beacon_ies) {
4890 /*
4891 * Wait up to one beacon interval ...
4892 * should this be more if we miss one?
4893 */
4894 sdata_info(sdata, "waiting for beacon from %pM\n",
4895 ifmgd->bssid);
4896 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
89afe614 4897 assoc_data->timeout_started = true;
c65dd147
EG		 4898 assoc_data->need_beacon = true;
4899 } else if (beacon_ies) {
4900 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4901 beacon_ies->data,
4902 beacon_ies->len);
ef429dad
JB		 4903 u8 dtim_count = 0;
4904
c65dd147
EG		 4905 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4906 const struct ieee80211_tim_ie *tim;
4907 tim = (void *)(tim_ie + 2);
4908 ifmgd->dtim_period = tim->dtim_period;
ef429dad 4909 dtim_count = tim->dtim_count;
826262c3 4910 }
989c6505 4911 ifmgd->have_beacon = true;
66e67e41 4912 assoc_data->timeout = jiffies;
89afe614 4913 assoc_data->timeout_started = true;
ef429dad 4914
30686bf7 4915 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
ef429dad
JB		 4916 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4917 sdata->vif.bss_conf.sync_device_ts =
4918 bss->device_ts_beacon;
4919 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4920 }
c65dd147
EG		 4921 } else {
4922 assoc_data->timeout = jiffies;
89afe614 4923 assoc_data->timeout_started = true;
66e67e41 4924 }
c65dd147
EG		 4925 rcu_read_unlock();
4926
8d61ffa5 4927 run_again(sdata, assoc_data->timeout);
66e67e41 4928
fcff4f10
PS		 4929 if (bss->corrupt_data) {
4930 char *corrupt_type = "data";
4931 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4932 if (bss->corrupt_data &
4933 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4934 corrupt_type = "beacon and probe response";
4935 else
4936 corrupt_type = "beacon";
4937 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4938 corrupt_type = "probe response";
bdcbd8e0
JB		 4939 sdata_info(sdata, "associating with AP with corrupt %s\n",
4940 corrupt_type);
fcff4f10
PS		 4941 }
4942
8d61ffa5 4943 return 0;
66e67e41 4944 err_clear:
c84a67a2 4945 eth_zero_addr(ifmgd->bssid);
3d2abdfd 4946 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 4947 ifmgd->assoc_data = NULL;
4948 err_free:
4949 kfree(assoc_data);
66e67e41 4950 return err;
f0706e82
JB		 4951}
4952
77fdaa12 4953int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
63c9c5e7 4954 struct cfg80211_deauth_request *req)
f0706e82 4955{
46900298 4956 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 4957 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
6863255b 4958 bool tx = !req->local_state_change;
f0706e82 4959
c9c3a060
JB		 4960 if (ifmgd->auth_data &&
4961 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
4962 sdata_info(sdata,
4963 "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
4964 req->bssid, req->reason_code,
4965 ieee80211_get_reason_code_string(req->reason_code));
0ff71613 4966
8c7d857c 4967 drv_mgd_prepare_tx(sdata->local, sdata);
37ad3888
JB		 4968 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4969 IEEE80211_STYPE_DEAUTH,
6863255b 4970 req->reason_code, tx,
37ad3888 4971 frame_buf);
86552017 4972 ieee80211_destroy_auth_data(sdata, false);
a90faa9d
EG		 4973 ieee80211_report_disconnect(sdata, frame_buf,
4974 sizeof(frame_buf), true,
4975 req->reason_code);
86552017 4976
c9c3a060 4977 return 0;
8c7d857c
EG		 4978 }
4979
86552017
JB		 4980 if (ifmgd->associated &&
4981 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
c9c3a060
JB		 4982 sdata_info(sdata,
4983 "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
4984 req->bssid, req->reason_code,
4985 ieee80211_get_reason_code_string(req->reason_code));
4986
86552017
JB		 4987 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4988 req->reason_code, tx, frame_buf);
a90faa9d
EG		 4989 ieee80211_report_disconnect(sdata, frame_buf,
4990 sizeof(frame_buf), true,
4991 req->reason_code);
c9c3a060
JB		 4992 return 0;
4993 }
86552017 4994
c9c3a060 4995 return -ENOTCONN;
f0706e82 4996}
84363e6e 4997
77fdaa12 4998int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 4999 struct cfg80211_disassoc_request *req)
9c6bd790 5000{
77fdaa12 5001 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 5002 u8 bssid[ETH_ALEN];
6ae16775 5003 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
9c6bd790 5004
8d8b261a
JB		 5005 /*
5006 * cfg80211 should catch this ... but it's racy since
5007 * we can receive a disassoc frame, process it, hand it
5008 * to cfg80211 while that's in a locked section already
5009 * trying to tell us that the user wants to disconnect.
5010 */
8d61ffa5 5011 if (ifmgd->associated != req->bss)
77fdaa12 5012 return -ENOLINK;
77fdaa12 5013
bdcbd8e0 5014 sdata_info(sdata,
dfa1ad29
CO		 5015 "disassociating from %pM by local choice (Reason: %u=%s)\n",
5016 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
0ff71613 5017
e69e95db 5018 memcpy(bssid, req->bss->bssid, ETH_ALEN);
37ad3888
JB		 5019 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
5020 req->reason_code, !req->local_state_change,
5021 frame_buf);
10f644a4 5022
a90faa9d
EG		 5023 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
5024 req->reason_code);
bc83b681 5025
10f644a4
JB		 5026 return 0;
5027}
026331c4 5028
afa762f6 5029void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
54e4ffb2
JB		 5030{
5031 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5032
49921859
BG		 5033 /*
5034 * Make sure some work items will not run after this,
5035 * they will not do anything but might not have been
5036 * cancelled when disconnecting.
5037 */
5038 cancel_work_sync(&ifmgd->monitor_work);
5039 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5040 cancel_work_sync(&ifmgd->request_smps_work);
5041 cancel_work_sync(&ifmgd->csa_connection_drop_work);
5042 cancel_work_sync(&ifmgd->chswitch_work);
81dd2b88 5043 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
49921859 5044
8d61ffa5 5045 sdata_lock(sdata);
959867fa
JB		 5046 if (ifmgd->assoc_data) {
5047 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
54e4ffb2 5048 ieee80211_destroy_assoc_data(sdata, false);
959867fa
JB		 5049 cfg80211_assoc_timeout(sdata->dev, bss);
5050 }
54e4ffb2
JB		 5051 if (ifmgd->auth_data)
5052 ieee80211_destroy_auth_data(sdata, false);
1277b4a9
LK		 5053 spin_lock_bh(&ifmgd->teardown_lock);
5054 if (ifmgd->teardown_skb) {
5055 kfree_skb(ifmgd->teardown_skb);
5056 ifmgd->teardown_skb = NULL;
5057 ifmgd->orig_teardown_skb = NULL;
5058 }
5059 spin_unlock_bh(&ifmgd->teardown_lock);
54e4ffb2 5060 del_timer_sync(&ifmgd->timer);
8d61ffa5 5061 sdata_unlock(sdata);
54e4ffb2
JB		 5062}
5063
a97c13c3
JO		 5064void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
5065 enum nl80211_cqm_rssi_threshold_event rssi_event,
5066 gfp_t gfp)
5067{
5068 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5069
b5878a2d
JB		 5070 trace_api_cqm_rssi_notify(sdata, rssi_event);
5071
a97c13c3
JO		 5072 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
5073}
5074EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
98f03342
JB		 5075
5076void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
5077{
5078 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5079
5080 trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
5081
5082 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
5083}
5084EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);
ubuntu-bionic-kernel mirror