]> git.proxmox.com Git - mirror_ubuntu-zesty-kernel.git/blame - net/mac80211/mlme.c
projects / mirror_ubuntu-zesty-kernel.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
net: rfkill: gpio: make better use of gpiod API
[mirror_ubuntu-zesty-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
7eeff74c
JB		 121 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
122 return;
123
b291ba11 124 mod_timer(&sdata->u.mgd.bcn_mon_timer,
7ccc8bd7 125 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
b291ba11
JB		 126}
127
be099e82
LR		 128void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
129{
0c699c3a
LR		 130 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
131
8628172f
SG		 132 if (unlikely(!sdata->u.mgd.associated))
133 return;
134
448cd2e2
EP		 135 ifmgd->probe_send_count = 0;
136
be099e82
LR		 137 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
138 return;
139
140 mod_timer(&sdata->u.mgd.conn_mon_timer,
141 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
142}
143
5484e237 144static int ecw2cw(int ecw)
60f8b39c 145{
5484e237 146 return (1 << ecw) - 1;
60f8b39c
JB		 147}
148
6565ec9b
JB		 149static u32
150ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
151 struct ieee80211_supported_band *sband,
152 struct ieee80211_channel *channel,
53b954ee 153 const struct ieee80211_ht_cap *ht_cap,
6565ec9b
JB		 154 const struct ieee80211_ht_operation *ht_oper,
155 const struct ieee80211_vht_operation *vht_oper,
5cdaed1e 156 struct cfg80211_chan_def *chandef, bool tracking)
6565ec9b 157{
5cdaed1e 158 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6565ec9b 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) {
672 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
673 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
674 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
675 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
676 }
677
678 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
679 capab |= WLAN_CAPABILITY_PRIVACY;
680
681 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
682 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
683 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
684
cd2f5dd7
AK		 685 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM)
686 capab |= WLAN_CAPABILITY_RADIO_MEASURE;
687
66e67e41
JB		 688 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
689 memset(mgmt, 0, 24);
690 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
691 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
692 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
693
694 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
695 skb_put(skb, 10);
696 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
697 IEEE80211_STYPE_REASSOC_REQ);
698 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
699 mgmt->u.reassoc_req.listen_interval =
700 cpu_to_le16(local->hw.conf.listen_interval);
701 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
702 ETH_ALEN);
703 } else {
704 skb_put(skb, 4);
705 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
706 IEEE80211_STYPE_ASSOC_REQ);
707 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
708 mgmt->u.assoc_req.listen_interval =
709 cpu_to_le16(local->hw.conf.listen_interval);
710 }
711
712 /* SSID */
713 pos = skb_put(skb, 2 + assoc_data->ssid_len);
714 *pos++ = WLAN_EID_SSID;
715 *pos++ = assoc_data->ssid_len;
716 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
717
718 /* add all rates which were marked to be used above */
719 supp_rates_len = rates_len;
720 if (supp_rates_len > 8)
721 supp_rates_len = 8;
722
723 pos = skb_put(skb, supp_rates_len + 2);
724 *pos++ = WLAN_EID_SUPP_RATES;
725 *pos++ = supp_rates_len;
726
727 count = 0;
728 for (i = 0; i < sband->n_bitrates; i++) {
729 if (BIT(i) & rates) {
2103dec1
SW		 730 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
731 5 * (1 << shift));
732 *pos++ = (u8) rate;
66e67e41
JB		 733 if (++count == 8)
734 break;
735 }
736 }
737
738 if (rates_len > count) {
739 pos = skb_put(skb, rates_len - count + 2);
740 *pos++ = WLAN_EID_EXT_SUPP_RATES;
741 *pos++ = rates_len - count;
742
743 for (i++; i < sband->n_bitrates; i++) {
744 if (BIT(i) & rates) {
2103dec1
SW		 745 int rate;
746 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
747 5 * (1 << shift));
748 *pos++ = (u8) rate;
66e67e41
JB		 749 }
750 }
751 }
752
cd2f5dd7
AK		 753 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT ||
754 capab & WLAN_CAPABILITY_RADIO_MEASURE) {
66e67e41
JB		 755 pos = skb_put(skb, 4);
756 *pos++ = WLAN_EID_PWR_CAPABILITY;
757 *pos++ = 2;
758 *pos++ = 0; /* min tx power */
0430c883
SW		 759 /* max tx power */
760 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
cd2f5dd7 761 }
66e67e41 762
cd2f5dd7 763 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
66e67e41
JB		 764 /* TODO: get this in reg domain format */
765 pos = skb_put(skb, 2 * sband->n_channels + 2);
766 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
767 *pos++ = 2 * sband->n_channels;
768 for (i = 0; i < sband->n_channels; i++) {
769 *pos++ = ieee80211_frequency_to_channel(
770 sband->channels[i].center_freq);
771 *pos++ = 1; /* one channel in the subband*/
772 }
773 }
774
775 /* if present, add any custom IEs that go before HT */
b3f51e94 776 if (assoc_data->ie_len) {
66e67e41
JB		 777 static const u8 before_ht[] = {
778 WLAN_EID_SSID,
779 WLAN_EID_SUPP_RATES,
780 WLAN_EID_EXT_SUPP_RATES,
781 WLAN_EID_PWR_CAPABILITY,
782 WLAN_EID_SUPPORTED_CHANNELS,
783 WLAN_EID_RSN,
784 WLAN_EID_QOS_CAPA,
785 WLAN_EID_RRM_ENABLED_CAPABILITIES,
786 WLAN_EID_MOBILITY_DOMAIN,
8ed28747
JB		 787 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */
788 WLAN_EID_RIC_DATA, /* reassoc only */
66e67e41
JB		 789 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
790 };
8ed28747
JB		 791 static const u8 after_ric[] = {
792 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
793 WLAN_EID_HT_CAPABILITY,
794 WLAN_EID_BSS_COEX_2040,
795 WLAN_EID_EXT_CAPABILITY,
796 WLAN_EID_QOS_TRAFFIC_CAPA,
797 WLAN_EID_TIM_BCAST_REQ,
798 WLAN_EID_INTERWORKING,
799 /* 60GHz doesn't happen right now */
800 WLAN_EID_VHT_CAPABILITY,
801 WLAN_EID_OPMODE_NOTIF,
802 };
803
804 noffset = ieee80211_ie_split_ric(assoc_data->ie,
805 assoc_data->ie_len,
806 before_ht,
807 ARRAY_SIZE(before_ht),
808 after_ric,
809 ARRAY_SIZE(after_ric),
810 offset);
66e67e41
JB		 811 pos = skb_put(skb, noffset - offset);
812 memcpy(pos, assoc_data->ie + offset, noffset - offset);
813 offset = noffset;
814 }
815
f2d9d270
JB		 816 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
817 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
818 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
819
a8243b72 820 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
9dde6423 821 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
04ecd257 822 sband, chan, sdata->smps_mode);
66e67e41 823
3de3802c
JB		 824 /* if present, add any custom IEs that go before VHT */
825 if (assoc_data->ie_len) {
826 static const u8 before_vht[] = {
827 WLAN_EID_SSID,
828 WLAN_EID_SUPP_RATES,
829 WLAN_EID_EXT_SUPP_RATES,
830 WLAN_EID_PWR_CAPABILITY,
831 WLAN_EID_SUPPORTED_CHANNELS,
832 WLAN_EID_RSN,
833 WLAN_EID_QOS_CAPA,
834 WLAN_EID_RRM_ENABLED_CAPABILITIES,
835 WLAN_EID_MOBILITY_DOMAIN,
836 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
837 WLAN_EID_HT_CAPABILITY,
838 WLAN_EID_BSS_COEX_2040,
839 WLAN_EID_EXT_CAPABILITY,
840 WLAN_EID_QOS_TRAFFIC_CAPA,
841 WLAN_EID_TIM_BCAST_REQ,
842 WLAN_EID_INTERWORKING,
843 };
8ed28747
JB		 844
845 /* RIC already taken above, so no need to handle here anymore */
3de3802c
JB		 846 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
847 before_vht, ARRAY_SIZE(before_vht),
848 offset);
849 pos = skb_put(skb, noffset - offset);
850 memcpy(pos, assoc_data->ie + offset, noffset - offset);
851 offset = noffset;
852 }
853
d545daba 854 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
b08fbbd8
JB		 855 ieee80211_add_vht_ie(sdata, skb, sband,
856 &assoc_data->ap_vht_cap);
d545daba 857
66e67e41 858 /* if present, add any custom non-vendor IEs that go after HT */
b3f51e94 859 if (assoc_data->ie_len) {
66e67e41
JB		 860 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
861 assoc_data->ie_len,
862 offset);
863 pos = skb_put(skb, noffset - offset);
864 memcpy(pos, assoc_data->ie + offset, noffset - offset);
865 offset = noffset;
866 }
867
76f0303d
JB		 868 if (assoc_data->wmm) {
869 if (assoc_data->uapsd) {
dc41e4d4
EP		 870 qos_info = ifmgd->uapsd_queues;
871 qos_info |= (ifmgd->uapsd_max_sp_len <<
66e67e41
JB		 872 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
873 } else {
874 qos_info = 0;
875 }
876
40b861a0 877 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
66e67e41
JB		 878 }
879
880 /* add any remaining custom (i.e. vendor specific here) IEs */
b3f51e94 881 if (assoc_data->ie_len) {
66e67e41
JB		 882 noffset = assoc_data->ie_len;
883 pos = skb_put(skb, noffset - offset);
884 memcpy(pos, assoc_data->ie + offset, noffset - offset);
885 }
886
a1845fc7
JB		 887 drv_mgd_prepare_tx(local, sdata);
888
66e67e41 889 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1672c0e3
JB		 890 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
891 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
892 IEEE80211_TX_INTFL_MLME_CONN_TX;
66e67e41
JB		 893 ieee80211_tx_skb(sdata, skb);
894}
895
572e0012
KV		 896void ieee80211_send_pspoll(struct ieee80211_local *local,
897 struct ieee80211_sub_if_data *sdata)
898{
572e0012
KV		 899 struct ieee80211_pspoll *pspoll;
900 struct sk_buff *skb;
572e0012 901
d8cd189e
KV		 902 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
903 if (!skb)
572e0012 904 return;
572e0012 905
d8cd189e
KV		 906 pspoll = (struct ieee80211_pspoll *) skb->data;
907 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
572e0012 908
62ae67be
JB		 909 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
910 ieee80211_tx_skb(sdata, skb);
572e0012
KV		 911}
912
965bedad
JB		 913void ieee80211_send_nullfunc(struct ieee80211_local *local,
914 struct ieee80211_sub_if_data *sdata,
915 int powersave)
916{
917 struct sk_buff *skb;
d8cd189e 918 struct ieee80211_hdr_3addr *nullfunc;
b6f35301 919 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
965bedad 920
d8cd189e
KV		 921 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
922 if (!skb)
965bedad 923 return;
965bedad 924
d8cd189e 925 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
965bedad 926 if (powersave)
d8cd189e 927 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
965bedad 928
6c17b77b
SF		 929 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
930 IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
ff40b425
PF		 931
932 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
933 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
934
392b9ffb 935 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
b6f35301
RM		 936 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
937
62ae67be 938 ieee80211_tx_skb(sdata, skb);
965bedad
JB		 939}
940
d524215f
FF		 941static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
942 struct ieee80211_sub_if_data *sdata)
943{
944 struct sk_buff *skb;
945 struct ieee80211_hdr *nullfunc;
946 __le16 fc;
947
948 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
949 return;
950
951 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
d15b8459 952 if (!skb)
d524215f 953 return;
d15b8459 954
d524215f
FF		 955 skb_reserve(skb, local->hw.extra_tx_headroom);
956
957 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
958 memset(nullfunc, 0, 30);
959 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
960 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
961 nullfunc->frame_control = fc;
962 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
963 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
964 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
965 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
966
967 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
968 ieee80211_tx_skb(sdata, skb);
969}
970
cc32abd4
JB		 971/* spectrum management related things */
972static void ieee80211_chswitch_work(struct work_struct *work)
973{
974 struct ieee80211_sub_if_data *sdata =
975 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
675a0b04 976 struct ieee80211_local *local = sdata->local;
cc32abd4 977 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
7578d575 978 int ret;
cc32abd4 979
9607e6b6 980 if (!ieee80211_sdata_running(sdata))
cc32abd4
JB		 981 return;
982
8d61ffa5 983 sdata_lock(sdata);
4c3ebc56
MK		 984 mutex_lock(&local->mtx);
985 mutex_lock(&local->chanctx_mtx);
986
77fdaa12
JB		 987 if (!ifmgd->associated)
988 goto out;
cc32abd4 989
4c3ebc56
MK		 990 if (!sdata->vif.csa_active)
991 goto out;
992
993 /*
994 * using reservation isn't immediate as it may be deferred until later
995 * with multi-vif. once reservation is complete it will re-schedule the
996 * work with no reserved_chanctx so verify chandef to check if it
997 * completed successfully
998 */
999
1000 if (sdata->reserved_chanctx) {
1001 /*
1002 * with multi-vif csa driver may call ieee80211_csa_finish()
1003 * many times while waiting for other interfaces to use their
1004 * reservations
1005 */
1006 if (sdata->reserved_ready)
1007 goto out;
1008
1009 ret = ieee80211_vif_use_reserved_context(sdata);
1010 if (ret) {
1011 sdata_info(sdata,
1012 "failed to use reserved channel context, disconnecting (err=%d)\n",
1013 ret);
1014 ieee80211_queue_work(&sdata->local->hw,
1015 &ifmgd->csa_connection_drop_work);
1016 goto out;
1017 }
1018
1019 goto out;
1020 }
1021
1022 if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
1023 &sdata->csa_chandef)) {
7578d575 1024 sdata_info(sdata,
4c3ebc56 1025 "failed to finalize channel switch, disconnecting\n");
7578d575
AN		 1026 ieee80211_queue_work(&sdata->local->hw,
1027 &ifmgd->csa_connection_drop_work);
1028 goto out;
1029 }
675a0b04 1030
cc32abd4 1031 /* XXX: shouldn't really modify cfg80211-owned data! */
33787fc4 1032 ifmgd->associated->channel = sdata->csa_chandef.chan;
cc32abd4 1033
0c21e632
LC		 1034 ifmgd->csa_waiting_bcn = true;
1035
1036 ieee80211_sta_reset_beacon_monitor(sdata);
1037 ieee80211_sta_reset_conn_monitor(sdata);
1038
1039out:
1040 mutex_unlock(&local->chanctx_mtx);
1041 mutex_unlock(&local->mtx);
1042 sdata_unlock(sdata);
1043}
1044
1045static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata)
1046{
1047 struct ieee80211_local *local = sdata->local;
1048 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1049 int ret;
1050
1051 sdata_assert_lock(sdata);
1052
1053 WARN_ON(!sdata->vif.csa_active);
4c3ebc56 1054
a46992b4
LC		 1055 if (sdata->csa_block_tx) {
1056 ieee80211_wake_vif_queues(local, sdata,
1057 IEEE80211_QUEUE_STOP_REASON_CSA);
1058 sdata->csa_block_tx = false;
1059 }
7578d575 1060
0c21e632
LC		 1061 sdata->vif.csa_active = false;
1062 ifmgd->csa_waiting_bcn = false;
1063
f1d65583
LC		 1064 ret = drv_post_channel_switch(sdata);
1065 if (ret) {
1066 sdata_info(sdata,
1067 "driver post channel switch failed, disconnecting\n");
1068 ieee80211_queue_work(&local->hw,
1069 &ifmgd->csa_connection_drop_work);
0c21e632 1070 return;
f1d65583 1071 }
688b1ecf
LC		 1072
1073 cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef);
cc32abd4
JB		 1074}
1075
5ce6e438
JB		 1076void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1077{
55de908a
JB		 1078 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1079 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5ce6e438
JB		 1080
1081 trace_api_chswitch_done(sdata, success);
1082 if (!success) {
882a7c69
JB		 1083 sdata_info(sdata,
1084 "driver channel switch failed, disconnecting\n");
1085 ieee80211_queue_work(&sdata->local->hw,
1086 &ifmgd->csa_connection_drop_work);
1087 } else {
1088 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
5ce6e438 1089 }
5ce6e438
JB		 1090}
1091EXPORT_SYMBOL(ieee80211_chswitch_done);
1092
cc32abd4
JB		 1093static void ieee80211_chswitch_timer(unsigned long data)
1094{
1095 struct ieee80211_sub_if_data *sdata =
1096 (struct ieee80211_sub_if_data *) data;
5bb644a0 1097
9b7d72c1 1098 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
cc32abd4
JB		 1099}
1100
c5a71688
AN		 1101static void ieee80211_teardown_tdls_peers(struct ieee80211_sub_if_data *sdata)
1102{
1103 struct sta_info *sta;
1104 u16 reason = WLAN_REASON_TDLS_TEARDOWN_UNSPECIFIED;
1105
1106 rcu_read_lock();
1107 list_for_each_entry_rcu(sta, &sdata->local->sta_list, list) {
1108 if (!sta->sta.tdls || sta->sdata != sdata || !sta->uploaded ||
1109 !test_sta_flag(sta, WLAN_STA_AUTHORIZED))
1110 continue;
1111
1112 ieee80211_tdls_oper_request(&sdata->vif, sta->sta.addr,
1113 NL80211_TDLS_TEARDOWN, reason,
1114 GFP_ATOMIC);
1115 }
1116 rcu_read_unlock();
1117}
1118
37799e52 1119static void
4a3cb702 1120ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
2ba45384
LC		 1121 u64 timestamp, u32 device_timestamp,
1122 struct ieee802_11_elems *elems,
04a161f4 1123 bool beacon)
cc32abd4 1124{
b4f286a1 1125 struct ieee80211_local *local = sdata->local;
cc32abd4 1126 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
37799e52 1127 struct cfg80211_bss *cbss = ifmgd->associated;
4c3ebc56 1128 struct ieee80211_chanctx_conf *conf;
55de908a 1129 struct ieee80211_chanctx *chanctx;
e6b7cde4 1130 enum ieee80211_band current_band;
c0f17eb9 1131 struct ieee80211_csa_ie csa_ie;
6d027bcc 1132 struct ieee80211_channel_switch ch_switch;
e6b7cde4 1133 int res;
cc32abd4 1134
8d61ffa5 1135 sdata_assert_lock(sdata);
77fdaa12 1136
37799e52 1137 if (!cbss)
cc32abd4
JB		 1138 return;
1139
b4f286a1 1140 if (local->scanning)
cc32abd4
JB		 1141 return;
1142
37799e52 1143 /* disregard subsequent announcements if we are already processing */
3e2a0226 1144 if (sdata->vif.csa_active)
cc32abd4
JB		 1145 return;
1146
e6b7cde4 1147 current_band = cbss->channel->band;
c0f17eb9 1148 memset(&csa_ie, 0, sizeof(csa_ie));
84469a45 1149 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band,
e6b7cde4 1150 ifmgd->flags,
c0f17eb9 1151 ifmgd->associated->bssid, &csa_ie);
e6b7cde4 1152 if (res < 0)
b4f286a1 1153 ieee80211_queue_work(&local->hw,
882a7c69 1154 &ifmgd->csa_connection_drop_work);
e6b7cde4 1155 if (res)
cc32abd4 1156 return;
cd64f2a9 1157
c0f17eb9 1158 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
85220d71
JB		 1159 IEEE80211_CHAN_DISABLED)) {
1160 sdata_info(sdata,
1161 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
e6b7cde4 1162 ifmgd->associated->bssid,
c0f17eb9
CYY		 1163 csa_ie.chandef.chan->center_freq,
1164 csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1165 csa_ie.chandef.center_freq2);
85220d71
JB		 1166 ieee80211_queue_work(&local->hw,
1167 &ifmgd->csa_connection_drop_work);
1168 return;
1169 }
1170
f84eaa10
JB		 1171 if (cfg80211_chandef_identical(&csa_ie.chandef,
1172 &sdata->vif.bss_conf.chandef)) {
1173 if (ifmgd->csa_ignored_same_chan)
1174 return;
1175 sdata_info(sdata,
1176 "AP %pM tries to chanswitch to same channel, ignore\n",
1177 ifmgd->associated->bssid);
1178 ifmgd->csa_ignored_same_chan = true;
1179 return;
1180 }
1181
c5a71688
AN		 1182 /*
1183 * Drop all TDLS peers - either we disconnect or move to a different
1184 * channel from this point on. There's no telling what our peer will do.
1185 * The TDLS WIDER_BW scenario is also problematic, as peers might now
1186 * have an incompatible wider chandef.
1187 */
1188 ieee80211_teardown_tdls_peers(sdata);
1189
4c3ebc56 1190 mutex_lock(&local->mtx);
7578d575 1191 mutex_lock(&local->chanctx_mtx);
4c3ebc56
MK		 1192 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1193 lockdep_is_held(&local->chanctx_mtx));
1194 if (!conf) {
1195 sdata_info(sdata,
1196 "no channel context assigned to vif?, disconnecting\n");
f3b0bbb3 1197 goto drop_connection;
4c3ebc56
MK		 1198 }
1199
1200 chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1201
0f791eb4
LC		 1202 if (local->use_chanctx &&
1203 !(local->hw.flags & IEEE80211_HW_CHANCTX_STA_CSA)) {
1204 sdata_info(sdata,
1205 "driver doesn't support chan-switch with channel contexts\n");
f3b0bbb3 1206 goto drop_connection;
55de908a
JB		 1207 }
1208
6d027bcc
LC		 1209 ch_switch.timestamp = timestamp;
1210 ch_switch.device_timestamp = device_timestamp;
1211 ch_switch.block_tx = csa_ie.mode;
1212 ch_switch.chandef = csa_ie.chandef;
1213 ch_switch.count = csa_ie.count;
1214
1215 if (drv_pre_channel_switch(sdata, &ch_switch)) {
1216 sdata_info(sdata,
1217 "preparing for channel switch failed, disconnecting\n");
f3b0bbb3 1218 goto drop_connection;
6d027bcc
LC		 1219 }
1220
4c3ebc56
MK		 1221 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1222 chanctx->mode, false);
1223 if (res) {
55de908a 1224 sdata_info(sdata,
4c3ebc56
MK		 1225 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1226 res);
f3b0bbb3 1227 goto drop_connection;
55de908a 1228 }
b4f286a1 1229 mutex_unlock(&local->chanctx_mtx);
55de908a 1230
c46a73f3 1231 sdata->vif.csa_active = true;
4c3ebc56 1232 sdata->csa_chandef = csa_ie.chandef;
59af6928 1233 sdata->csa_block_tx = csa_ie.mode;
f84eaa10 1234 ifmgd->csa_ignored_same_chan = false;
55de908a 1235
59af6928 1236 if (sdata->csa_block_tx)
a46992b4
LC		 1237 ieee80211_stop_vif_queues(local, sdata,
1238 IEEE80211_QUEUE_STOP_REASON_CSA);
59af6928 1239 mutex_unlock(&local->mtx);
57eebdf3 1240
2f457293
LC		 1241 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef,
1242 csa_ie.count);
1243
b4f286a1 1244 if (local->ops->channel_switch) {
5ce6e438 1245 /* use driver's channel switch callback */
0f791eb4 1246 drv_channel_switch(local, sdata, &ch_switch);
5ce6e438
JB		 1247 return;
1248 }
1249
1250 /* channel switch handled in software */
c0f17eb9 1251 if (csa_ie.count <= 1)
b4f286a1 1252 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
57eebdf3 1253 else
cc32abd4 1254 mod_timer(&ifmgd->chswitch_timer,
ff1e417c
LC		 1255 TU_TO_EXP_TIME((csa_ie.count - 1) *
1256 cbss->beacon_interval));
f3b0bbb3
JB		 1257 return;
1258 drop_connection:
1259 ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work);
1260 mutex_unlock(&local->chanctx_mtx);
1261 mutex_unlock(&local->mtx);
cc32abd4
JB		 1262}
1263
24a4e400
SG		 1264static bool
1265ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1266 struct ieee80211_channel *channel,
1267 const u8 *country_ie, u8 country_ie_len,
1268 const u8 *pwr_constr_elem,
1269 int *chan_pwr, int *pwr_reduction)
cc32abd4 1270{
04b7b2ff
JB		 1271 struct ieee80211_country_ie_triplet *triplet;
1272 int chan = ieee80211_frequency_to_channel(channel->center_freq);
24a4e400 1273 int i, chan_increment;
04b7b2ff 1274 bool have_chan_pwr = false;
cc32abd4 1275
04b7b2ff
JB		 1276 /* Invalid IE */
1277 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
24a4e400 1278 return false;
cc32abd4 1279
04b7b2ff
JB		 1280 triplet = (void *)(country_ie + 3);
1281 country_ie_len -= 3;
1282
1283 switch (channel->band) {
1284 default:
1285 WARN_ON_ONCE(1);
1286 /* fall through */
1287 case IEEE80211_BAND_2GHZ:
1288 case IEEE80211_BAND_60GHZ:
1289 chan_increment = 1;
1290 break;
1291 case IEEE80211_BAND_5GHZ:
1292 chan_increment = 4;
1293 break;
cc32abd4 1294 }
04b7b2ff
JB		 1295
1296 /* find channel */
1297 while (country_ie_len >= 3) {
1298 u8 first_channel = triplet->chans.first_channel;
1299
1300 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1301 goto next;
1302
1303 for (i = 0; i < triplet->chans.num_channels; i++) {
1304 if (first_channel + i * chan_increment == chan) {
1305 have_chan_pwr = true;
24a4e400 1306 *chan_pwr = triplet->chans.max_power;
04b7b2ff
JB		 1307 break;
1308 }
1309 }
1310 if (have_chan_pwr)
1311 break;
1312
1313 next:
1314 triplet++;
1315 country_ie_len -= 3;
1316 }
1317
a5fee9cb 1318 if (have_chan_pwr && pwr_constr_elem)
24a4e400 1319 *pwr_reduction = *pwr_constr_elem;
a5fee9cb
MB		 1320 else
1321 *pwr_reduction = 0;
1322
24a4e400
SG		 1323 return have_chan_pwr;
1324}
1325
c8d65917
SG		 1326static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
1327 struct ieee80211_channel *channel,
1328 const u8 *cisco_dtpc_ie,
1329 int *pwr_level)
1330{
1331 /* From practical testing, the first data byte of the DTPC element
1332 * seems to contain the requested dBm level, and the CLI on Cisco
1333 * APs clearly state the range is -127 to 127 dBm, which indicates
1334 * a signed byte, although it seemingly never actually goes negative.
1335 * The other byte seems to always be zero.
1336 */
1337 *pwr_level = (__s8)cisco_dtpc_ie[4];
1338}
1339
24a4e400
SG		 1340static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1341 struct ieee80211_channel *channel,
1342 struct ieee80211_mgmt *mgmt,
1343 const u8 *country_ie, u8 country_ie_len,
c8d65917
SG		 1344 const u8 *pwr_constr_ie,
1345 const u8 *cisco_dtpc_ie)
24a4e400 1346{
c8d65917
SG		 1347 bool has_80211h_pwr = false, has_cisco_pwr = false;
1348 int chan_pwr = 0, pwr_reduction_80211h = 0;
1349 int pwr_level_cisco, pwr_level_80211h;
24a4e400 1350 int new_ap_level;
a5fee9cb 1351 __le16 capab = mgmt->u.probe_resp.capab_info;
04b7b2ff 1352
a5fee9cb
MB		 1353 if (country_ie &&
1354 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) ||
1355 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) {
24a4e400
SG		 1356 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
1357 sdata, channel, country_ie, country_ie_len,
1358 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
c8d65917
SG		 1359 pwr_level_80211h =
1360 max_t(int, 0, chan_pwr - pwr_reduction_80211h);
1361 }
1362
1363 if (cisco_dtpc_ie) {
1364 ieee80211_find_cisco_dtpc(
1365 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
1366 has_cisco_pwr = true;
24a4e400 1367 }
04b7b2ff 1368
c8d65917 1369 if (!has_80211h_pwr && !has_cisco_pwr)
1ea6f9c0 1370 return 0;
04b7b2ff 1371
c8d65917
SG		 1372 /* If we have both 802.11h and Cisco DTPC, apply both limits
1373 * by picking the smallest of the two power levels advertised.
1374 */
1375 if (has_80211h_pwr &&
1376 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
cef2fc1c
JL		 1377 sdata_dbg(sdata,
1378 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1379 pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
1380 sdata->u.mgd.bssid);
c8d65917
SG		 1381 new_ap_level = pwr_level_80211h;
1382 } else { /* has_cisco_pwr is always true here. */
cef2fc1c
JL		 1383 sdata_dbg(sdata,
1384 "Limiting TX power to %d dBm as advertised by %pM\n",
1385 pwr_level_cisco, sdata->u.mgd.bssid);
c8d65917
SG		 1386 new_ap_level = pwr_level_cisco;
1387 }
04b7b2ff 1388
1ea6f9c0
JB		 1389 if (sdata->ap_power_level == new_ap_level)
1390 return 0;
04b7b2ff 1391
1ea6f9c0
JB		 1392 sdata->ap_power_level = new_ap_level;
1393 if (__ieee80211_recalc_txpower(sdata))
1394 return BSS_CHANGED_TXPOWER;
1395 return 0;
cc32abd4
JB		 1396}
1397
965bedad
JB		 1398/* powersave */
1399static void ieee80211_enable_ps(struct ieee80211_local *local,
1400 struct ieee80211_sub_if_data *sdata)
1401{
1402 struct ieee80211_conf *conf = &local->hw.conf;
1403
d5edaedc
JB		 1404 /*
1405 * If we are scanning right now then the parameters will
1406 * take effect when scan finishes.
1407 */
fbe9c429 1408 if (local->scanning)
d5edaedc
JB		 1409 return;
1410
965bedad
JB		 1411 if (conf->dynamic_ps_timeout > 0 &&
1412 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
1413 mod_timer(&local->dynamic_ps_timer, jiffies +
1414 msecs_to_jiffies(conf->dynamic_ps_timeout));
1415 } else {
1416 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1417 ieee80211_send_nullfunc(local, sdata, 1);
375177bf 1418
2a13052f
JO		 1419 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1420 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
1421 return;
1422
1423 conf->flags |= IEEE80211_CONF_PS;
1424 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965bedad
JB		 1425 }
1426}
1427
1428static void ieee80211_change_ps(struct ieee80211_local *local)
1429{
1430 struct ieee80211_conf *conf = &local->hw.conf;
1431
1432 if (local->ps_sdata) {
965bedad
JB		 1433 ieee80211_enable_ps(local, local->ps_sdata);
1434 } else if (conf->flags & IEEE80211_CONF_PS) {
1435 conf->flags &= ~IEEE80211_CONF_PS;
1436 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1437 del_timer_sync(&local->dynamic_ps_timer);
1438 cancel_work_sync(&local->dynamic_ps_enable_work);
1439 }
1440}
1441
808118cb
JY		 1442static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1443{
1444 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1445 struct sta_info *sta = NULL;
c2c98fde 1446 bool authorized = false;
808118cb
JY		 1447
1448 if (!mgd->powersave)
1449 return false;
1450
05cb9108
JB		 1451 if (mgd->broken_ap)
1452 return false;
1453
808118cb
JY		 1454 if (!mgd->associated)
1455 return false;
1456
392b9ffb 1457 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
808118cb
JY		 1458 return false;
1459
989c6505 1460 if (!mgd->have_beacon)
ce857888
AB		 1461 return false;
1462
808118cb
JY		 1463 rcu_read_lock();
1464 sta = sta_info_get(sdata, mgd->bssid);
1465 if (sta)
c2c98fde 1466 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
808118cb
JY		 1467 rcu_read_unlock();
1468
c2c98fde 1469 return authorized;
808118cb
JY		 1470}
1471
965bedad 1472/* need to hold RTNL or interface lock */
10f644a4 1473void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 1474{
1475 struct ieee80211_sub_if_data *sdata, *found = NULL;
1476 int count = 0;
195e294d 1477 int timeout;
965bedad
JB		 1478
1479 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
1480 local->ps_sdata = NULL;
1481 return;
1482 }
1483
1484 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 1485 if (!ieee80211_sdata_running(sdata))
965bedad 1486 continue;
8c7914de
RM		 1487 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1488 /* If an AP vif is found, then disable PS
1489 * by setting the count to zero thereby setting
1490 * ps_sdata to NULL.
1491 */
1492 count = 0;
1493 break;
1494 }
965bedad
JB		 1495 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1496 continue;
1497 found = sdata;
1498 count++;
1499 }
1500
808118cb 1501 if (count == 1 && ieee80211_powersave_allowed(found)) {
10f644a4
JB		 1502 s32 beaconint_us;
1503
1504 if (latency < 0)
ed77134b 1505 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
10f644a4
JB		 1506
1507 beaconint_us = ieee80211_tu_to_usec(
1508 found->vif.bss_conf.beacon_int);
1509
ff616381 1510 timeout = local->dynamic_ps_forced_timeout;
195e294d
JO		 1511 if (timeout < 0) {
1512 /*
ff616381
JO		 1513 * Go to full PSM if the user configures a very low
1514 * latency requirement.
0ab82b04
EP		 1515 * The 2000 second value is there for compatibility
1516 * until the PM_QOS_NETWORK_LATENCY is configured
1517 * with real values.
195e294d 1518 */
0ab82b04
EP		 1519 if (latency > (1900 * USEC_PER_MSEC) &&
1520 latency != (2000 * USEC_PER_SEC))
195e294d 1521 timeout = 0;
ff616381
JO		 1522 else
1523 timeout = 100;
195e294d 1524 }
09b85568 1525 local->hw.conf.dynamic_ps_timeout = timeout;
195e294d 1526
04fe2037 1527 if (beaconint_us > latency) {
10f644a4 1528 local->ps_sdata = NULL;
04fe2037 1529 } else {
04fe2037 1530 int maxslp = 1;
826262c3 1531 u8 dtimper = found->u.mgd.dtim_period;
56007a02
JB		 1532
1533 /* If the TIM IE is invalid, pretend the value is 1 */
1534 if (!dtimper)
1535 dtimper = 1;
1536 else if (dtimper > 1)
04fe2037
JB		 1537 maxslp = min_t(int, dtimper,
1538 latency / beaconint_us);
1539
9ccebe61 1540 local->hw.conf.max_sleep_period = maxslp;
56007a02 1541 local->hw.conf.ps_dtim_period = dtimper;
10f644a4 1542 local->ps_sdata = found;
04fe2037 1543 }
10f644a4 1544 } else {
965bedad 1545 local->ps_sdata = NULL;
10f644a4 1546 }
965bedad
JB		 1547
1548 ieee80211_change_ps(local);
1549}
1550
ab095877
EP		 1551void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1552{
1553 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1554
1555 if (sdata->vif.bss_conf.ps != ps_allowed) {
1556 sdata->vif.bss_conf.ps = ps_allowed;
1557 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1558 }
1559}
1560
965bedad
JB		 1561void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1562{
1563 struct ieee80211_local *local =
1564 container_of(work, struct ieee80211_local,
1565 dynamic_ps_disable_work);
1566
1567 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1568 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1569 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1570 }
1571
1572 ieee80211_wake_queues_by_reason(&local->hw,
445ea4e8 1573 IEEE80211_MAX_QUEUE_MAP,
cca07b00
LC		 1574 IEEE80211_QUEUE_STOP_REASON_PS,
1575 false);
965bedad
JB		 1576}
1577
1578void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1579{
1580 struct ieee80211_local *local =
1581 container_of(work, struct ieee80211_local,
1582 dynamic_ps_enable_work);
1583 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
5e34069c 1584 struct ieee80211_if_managed *ifmgd;
1ddc2867
RM		 1585 unsigned long flags;
1586 int q;
965bedad
JB		 1587
1588 /* can only happen when PS was just disabled anyway */
1589 if (!sdata)
1590 return;
1591
5e34069c
CL		 1592 ifmgd = &sdata->u.mgd;
1593
965bedad
JB		 1594 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1595 return;
1596
09b85568 1597 if (local->hw.conf.dynamic_ps_timeout > 0) {
77b7023a
AN		 1598 /* don't enter PS if TX frames are pending */
1599 if (drv_tx_frames_pending(local)) {
1ddc2867
RM		 1600 mod_timer(&local->dynamic_ps_timer, jiffies +
1601 msecs_to_jiffies(
1602 local->hw.conf.dynamic_ps_timeout));
1603 return;
1604 }
77b7023a
AN		 1605
1606 /*
1607 * transmission can be stopped by others which leads to
1608 * dynamic_ps_timer expiry. Postpone the ps timer if it
1609 * is not the actual idle state.
1610 */
1611 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1612 for (q = 0; q < local->hw.queues; q++) {
1613 if (local->queue_stop_reasons[q]) {
1614 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1615 flags);
1616 mod_timer(&local->dynamic_ps_timer, jiffies +
1617 msecs_to_jiffies(
1618 local->hw.conf.dynamic_ps_timeout));
1619 return;
1620 }
1621 }
1622 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1ddc2867 1623 }
1ddc2867 1624
375177bf 1625 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
9c38a8b4 1626 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
a1598383 1627 if (drv_tx_frames_pending(local)) {
e8306f98
VN		 1628 mod_timer(&local->dynamic_ps_timer, jiffies +
1629 msecs_to_jiffies(
1630 local->hw.conf.dynamic_ps_timeout));
a1598383 1631 } else {
e8306f98
VN		 1632 ieee80211_send_nullfunc(local, sdata, 1);
1633 /* Flush to get the tx status of nullfunc frame */
3b24f4c6 1634 ieee80211_flush_queues(local, sdata, false);
e8306f98 1635 }
f3e85b9e
VN		 1636 }
1637
2a13052f
JO		 1638 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1639 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
375177bf
VN		 1640 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1641 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1642 local->hw.conf.flags |= IEEE80211_CONF_PS;
1643 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1644 }
965bedad
JB		 1645}
1646
1647void ieee80211_dynamic_ps_timer(unsigned long data)
1648{
1649 struct ieee80211_local *local = (void *) data;
1650
42935eca 1651 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 1652}
1653
164eb02d
SW		 1654void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1655{
1656 struct delayed_work *delayed_work =
1657 container_of(work, struct delayed_work, work);
1658 struct ieee80211_sub_if_data *sdata =
1659 container_of(delayed_work, struct ieee80211_sub_if_data,
1660 dfs_cac_timer_work);
d2859df5 1661 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
164eb02d 1662
34a3740d
JB		 1663 mutex_lock(&sdata->local->mtx);
1664 if (sdata->wdev.cac_started) {
1665 ieee80211_vif_release_channel(sdata);
1666 cfg80211_cac_event(sdata->dev, &chandef,
1667 NL80211_RADAR_CAC_FINISHED,
1668 GFP_KERNEL);
1669 }
1670 mutex_unlock(&sdata->local->mtx);
164eb02d
SW		 1671}
1672
02219b3a
JB		 1673static bool
1674__ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1675{
1676 struct ieee80211_local *local = sdata->local;
1677 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
cc72f6e2 1678 bool ret = false;
02219b3a
JB		 1679 int ac;
1680
1681 if (local->hw.queues < IEEE80211_NUM_ACS)
1682 return false;
1683
1684 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1685 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
1686 int non_acm_ac;
1687 unsigned long now = jiffies;
1688
1689 if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
1690 tx_tspec->admitted_time &&
1691 time_after(now, tx_tspec->time_slice_start + HZ)) {
1692 tx_tspec->consumed_tx_time = 0;
1693 tx_tspec->time_slice_start = now;
1694
1695 if (tx_tspec->downgraded)
1696 tx_tspec->action =
1697 TX_TSPEC_ACTION_STOP_DOWNGRADE;
1698 }
1699
1700 switch (tx_tspec->action) {
1701 case TX_TSPEC_ACTION_STOP_DOWNGRADE:
1702 /* take the original parameters */
1703 if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac]))
1704 sdata_err(sdata,
1705 "failed to set TX queue parameters for queue %d\n",
1706 ac);
1707 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1708 tx_tspec->downgraded = false;
1709 ret = true;
1710 break;
1711 case TX_TSPEC_ACTION_DOWNGRADE:
1712 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
1713 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1714 ret = true;
1715 break;
1716 }
1717 /* downgrade next lower non-ACM AC */
1718 for (non_acm_ac = ac + 1;
1719 non_acm_ac < IEEE80211_NUM_ACS;
1720 non_acm_ac++)
1721 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
1722 break;
1723 /* The loop will result in using BK even if it requires
1724 * admission control, such configuration makes no sense
1725 * and we have to transmit somehow - the AC selection
1726 * does the same thing.
1727 */
1728 if (drv_conf_tx(local, sdata, ac,
1729 &sdata->tx_conf[non_acm_ac]))
1730 sdata_err(sdata,
1731 "failed to set TX queue parameters for queue %d\n",
1732 ac);
1733 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1734 ret = true;
1735 schedule_delayed_work(&ifmgd->tx_tspec_wk,
1736 tx_tspec->time_slice_start + HZ - now + 1);
1737 break;
1738 case TX_TSPEC_ACTION_NONE:
1739 /* nothing now */
1740 break;
1741 }
1742 }
1743
1744 return ret;
1745}
1746
1747void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1748{
1749 if (__ieee80211_sta_handle_tspec_ac_params(sdata))
1750 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1751}
1752
1753static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
1754{
1755 struct ieee80211_sub_if_data *sdata;
1756
1757 sdata = container_of(work, struct ieee80211_sub_if_data,
1758 u.mgd.tx_tspec_wk.work);
1759 ieee80211_sta_handle_tspec_ac_params(sdata);
1760}
1761
60f8b39c 1762/* MLME */
7d25745d 1763static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
4ced3f74 1764 struct ieee80211_sub_if_data *sdata,
4a3cb702 1765 const u8 *wmm_param, size_t wmm_param_len)
f0706e82 1766{
f0706e82 1767 struct ieee80211_tx_queue_params params;
4ced3f74 1768 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1769 size_t left;
1770 int count;
4a3cb702
JB		 1771 const u8 *pos;
1772 u8 uapsd_queues = 0;
f0706e82 1773
e1b3ec1a 1774 if (!local->ops->conf_tx)
7d25745d 1775 return false;
e1b3ec1a 1776
32c5057b 1777 if (local->hw.queues < IEEE80211_NUM_ACS)
7d25745d 1778 return false;
3434fbd3
JB		 1779
1780 if (!wmm_param)
7d25745d 1781 return false;
3434fbd3 1782
f0706e82 1783 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
7d25745d 1784 return false;
ab13315a
KV		 1785
1786 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
dc41e4d4 1787 uapsd_queues = ifmgd->uapsd_queues;
ab13315a 1788
f0706e82 1789 count = wmm_param[6] & 0x0f;
46900298 1790 if (count == ifmgd->wmm_last_param_set)
7d25745d 1791 return false;
46900298 1792 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 1793
1794 pos = wmm_param + 8;
1795 left = wmm_param_len - 8;
1796
1797 memset(&params, 0, sizeof(params));
1798
00e96dec 1799 sdata->wmm_acm = 0;
f0706e82
JB		 1800 for (; left >= 4; left -= 4, pos += 4) {
1801 int aci = (pos[0] >> 5) & 0x03;
1802 int acm = (pos[0] >> 4) & 0x01;
ab13315a 1803 bool uapsd = false;
f0706e82
JB		 1804 int queue;
1805
1806 switch (aci) {
0eeb59fe 1807 case 1: /* AC_BK */
e100bb64 1808 queue = 3;
988c0f72 1809 if (acm)
00e96dec 1810 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV		 1811 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1812 uapsd = true;
f0706e82 1813 break;
0eeb59fe 1814 case 2: /* AC_VI */
e100bb64 1815 queue = 1;
988c0f72 1816 if (acm)
00e96dec 1817 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV		 1818 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1819 uapsd = true;
f0706e82 1820 break;
0eeb59fe 1821 case 3: /* AC_VO */
e100bb64 1822 queue = 0;
988c0f72 1823 if (acm)
00e96dec 1824 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV		 1825 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1826 uapsd = true;
f0706e82 1827 break;
0eeb59fe 1828 case 0: /* AC_BE */
f0706e82 1829 default:
e100bb64 1830 queue = 2;
988c0f72 1831 if (acm)
00e96dec 1832 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV		 1833 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1834 uapsd = true;
f0706e82
JB		 1835 break;
1836 }
1837
1838 params.aifs = pos[0] & 0x0f;
1839 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1840 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 1841 params.txop = get_unaligned_le16(pos + 2);
908f8d07 1842 params.acm = acm;
ab13315a
KV		 1843 params.uapsd = uapsd;
1844
bdcbd8e0 1845 mlme_dbg(sdata,
02219b3a 1846 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
bdcbd8e0
JB		 1847 queue, aci, acm,
1848 params.aifs, params.cw_min, params.cw_max,
02219b3a
JB		 1849 params.txop, params.uapsd,
1850 ifmgd->tx_tspec[queue].downgraded);
f6f3def3 1851 sdata->tx_conf[queue] = params;
02219b3a
JB		 1852 if (!ifmgd->tx_tspec[queue].downgraded &&
1853 drv_conf_tx(local, sdata, queue, &params))
bdcbd8e0
JB		 1854 sdata_err(sdata,
1855 "failed to set TX queue parameters for queue %d\n",
1856 queue);
f0706e82 1857 }
e1b3ec1a
SG		 1858
1859 /* enable WMM or activate new settings */
4ced3f74 1860 sdata->vif.bss_conf.qos = true;
7d25745d 1861 return true;
f0706e82
JB		 1862}
1863
925e64c3
SG		 1864static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1865{
1866 lockdep_assert_held(&sdata->local->mtx);
1867
392b9ffb 1868 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
925e64c3
SG		 1869 ieee80211_run_deferred_scan(sdata->local);
1870}
1871
1872static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1873{
1874 mutex_lock(&sdata->local->mtx);
1875 __ieee80211_stop_poll(sdata);
1876 mutex_unlock(&sdata->local->mtx);
1877}
1878
7a5158ef
JB		 1879static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1880 u16 capab, bool erp_valid, u8 erp)
5628221c 1881{
bda3933a 1882 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 1883 u32 changed = 0;
7a5158ef
JB		 1884 bool use_protection;
1885 bool use_short_preamble;
1886 bool use_short_slot;
1887
1888 if (erp_valid) {
1889 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1890 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1891 } else {
1892 use_protection = false;
1893 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1894 }
1895
1896 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
55de908a 1897 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
43d35343 1898 use_short_slot = true;
5628221c 1899
471b3efd 1900 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 1901 bss_conf->use_cts_prot = use_protection;
1902 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 1903 }
7e9ed188 1904
d43c7b37 1905 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 1906 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 1907 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 1908 }
d9430a32 1909
7a5158ef 1910 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 1911 bss_conf->use_short_slot = use_short_slot;
1912 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 1913 }
1914
1915 return changed;
1916}
1917
f698d856 1918static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 1919 struct cfg80211_bss *cbss,
ae5eb026 1920 u32 bss_info_changed)
f0706e82 1921{
0c1ad2ca 1922 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 1923 struct ieee80211_local *local = sdata->local;
68542962 1924 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
d6f2da5b 1925
ae5eb026 1926 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 1927 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
50ae34a2 1928 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 1929
7ccc8bd7 1930 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
59c1ec2b 1931 beacon_loss_count * bss_conf->beacon_int));
7ccc8bd7 1932
0c1ad2ca
JB		 1933 sdata->u.mgd.associated = cbss;
1934 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 1935
17e4ec14
JM		 1936 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1937
488dd7b5 1938 if (sdata->vif.p2p) {
9caf0364 1939 const struct cfg80211_bss_ies *ies;
488dd7b5 1940
9caf0364
JB		 1941 rcu_read_lock();
1942 ies = rcu_dereference(cbss->ies);
1943 if (ies) {
9caf0364
JB		 1944 int ret;
1945
1946 ret = cfg80211_get_p2p_attr(
1947 ies->data, ies->len,
1948 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
67baf663
JD		 1949 (u8 *) &bss_conf->p2p_noa_attr,
1950 sizeof(bss_conf->p2p_noa_attr));
9caf0364 1951 if (ret >= 2) {
67baf663
JD		 1952 sdata->u.mgd.p2p_noa_index =
1953 bss_conf->p2p_noa_attr.index;
9caf0364 1954 bss_info_changed |= BSS_CHANGED_P2P_PS;
9caf0364 1955 }
488dd7b5 1956 }
9caf0364 1957 rcu_read_unlock();
488dd7b5
JB		 1958 }
1959
b291ba11 1960 /* just to be sure */
925e64c3 1961 ieee80211_stop_poll(sdata);
b291ba11 1962
9ac19a90 1963 ieee80211_led_assoc(local, 1);
9306102e 1964
989c6505 1965 if (sdata->u.mgd.have_beacon) {
826262c3
JB		 1966 /*
1967 * If the AP is buggy we may get here with no DTIM period
1968 * known, so assume it's 1 which is the only safe assumption
1969 * in that case, although if the TIM IE is broken powersave
1970 * probably just won't work at all.
1971 */
1972 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
817cee76 1973 bss_conf->beacon_rate = bss->beacon_rate;
989c6505 1974 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
826262c3 1975 } else {
817cee76 1976 bss_conf->beacon_rate = NULL;
e5b900d2 1977 bss_conf->dtim_period = 0;
826262c3 1978 }
e5b900d2 1979
68542962 1980 bss_conf->assoc = 1;
9cef8737 1981
a97c13c3 1982 /* Tell the driver to monitor connection quality (if supported) */
ea086359 1983 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
68542962 1984 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 1985 bss_info_changed |= BSS_CHANGED_CQM;
1986
68542962 1987 /* Enable ARP filtering */
0f19b41e 1988 if (bss_conf->arp_addr_cnt)
68542962 1989 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
68542962 1990
ae5eb026 1991 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 1992
056508dc
JB		 1993 mutex_lock(&local->iflist_mtx);
1994 ieee80211_recalc_ps(local, -1);
1995 mutex_unlock(&local->iflist_mtx);
e0cb686f 1996
04ecd257 1997 ieee80211_recalc_smps(sdata);
ab095877
EP		 1998 ieee80211_recalc_ps_vif(sdata);
1999
9ac19a90 2000 netif_carrier_on(sdata->dev);
f0706e82
JB		 2001}
2002
e69e95db 2003static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
37ad3888
JB		 2004 u16 stype, u16 reason, bool tx,
2005 u8 *frame_buf)
aa458d17 2006{
46900298 2007 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17 2008 struct ieee80211_local *local = sdata->local;
3cc5240b 2009 u32 changed = 0;
aa458d17 2010
8d61ffa5 2011 sdata_assert_lock(sdata);
77fdaa12 2012
37ad3888
JB		 2013 if (WARN_ON_ONCE(tx && !frame_buf))
2014 return;
2015
b291ba11
JB		 2016 if (WARN_ON(!ifmgd->associated))
2017 return;
2018
79543d8e
DS		 2019 ieee80211_stop_poll(sdata);
2020
77fdaa12 2021 ifmgd->associated = NULL;
aa458d17
TW		 2022 netif_carrier_off(sdata->dev);
2023
88bc40e8
EP		 2024 /*
2025 * if we want to get out of ps before disassoc (why?) we have
2026 * to do it before sending disassoc, as otherwise the null-packet
2027 * won't be valid.
2028 */
2029 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2030 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2031 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2032 }
2033 local->ps_sdata = NULL;
2034
ab095877
EP		 2035 /* disable per-vif ps */
2036 ieee80211_recalc_ps_vif(sdata);
2037
14f2ae83
EG		 2038 /* make sure ongoing transmission finishes */
2039 synchronize_net();
2040
3b24f4c6
EG		 2041 /*
2042 * drop any frame before deauth/disassoc, this can be data or
2043 * management frame. Since we are disconnecting, we should not
2044 * insist sending these frames which can take time and delay
2045 * the disconnection and possible the roaming.
2046 */
f823981e 2047 if (tx)
3b24f4c6 2048 ieee80211_flush_queues(local, sdata, true);
f823981e 2049
37ad3888
JB		 2050 /* deauthenticate/disassociate now */
2051 if (tx || frame_buf)
88a9e31c
EP		 2052 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
2053 reason, tx, frame_buf);
37ad3888 2054
3b24f4c6 2055 /* flush out frame - make sure the deauth was actually sent */
37ad3888 2056 if (tx)
3b24f4c6 2057 ieee80211_flush_queues(local, sdata, false);
37ad3888 2058
88a9e31c 2059 /* clear bssid only after building the needed mgmt frames */
c84a67a2 2060 eth_zero_addr(ifmgd->bssid);
88a9e31c 2061
37ad3888 2062 /* remove AP and TDLS peers */
d34ba216 2063 sta_info_flush(sdata);
37ad3888
JB		 2064
2065 /* finally reset all BSS / config parameters */
f5e5bf25
TW		 2066 changed |= ieee80211_reset_erp_info(sdata);
2067
f5e5bf25 2068 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 2069 changed |= BSS_CHANGED_ASSOC;
2070 sdata->vif.bss_conf.assoc = false;
f5e5bf25 2071
67baf663
JD		 2072 ifmgd->p2p_noa_index = -1;
2073 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
2074 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
488dd7b5 2075
dd5ecfea 2076 /* on the next assoc, re-program HT/VHT parameters */
ef96a842
BG		 2077 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
2078 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
dd5ecfea
JB		 2079 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
2080 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
413ad50a 2081
1ea6f9c0 2082 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
a8302de9 2083
520eb820
KV		 2084 del_timer_sync(&local->dynamic_ps_timer);
2085 cancel_work_sync(&local->dynamic_ps_enable_work);
2086
68542962 2087 /* Disable ARP filtering */
0f19b41e 2088 if (sdata->vif.bss_conf.arp_addr_cnt)
68542962 2089 changed |= BSS_CHANGED_ARP_FILTER;
68542962 2090
3abead59
JB		 2091 sdata->vif.bss_conf.qos = false;
2092 changed |= BSS_CHANGED_QOS;
2093
0aaffa9b
JB		 2094 /* The BSSID (not really interesting) and HT changed */
2095 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 2096 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 2097
3abead59
JB		 2098 /* disassociated - set to defaults now */
2099 ieee80211_set_wmm_default(sdata, false);
2100
b9dcf712
JB		 2101 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
2102 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
2103 del_timer_sync(&sdata->u.mgd.timer);
2104 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2d9957cc 2105
826262c3 2106 sdata->vif.bss_conf.dtim_period = 0;
817cee76
AB		 2107 sdata->vif.bss_conf.beacon_rate = NULL;
2108
989c6505 2109 ifmgd->have_beacon = false;
826262c3 2110
028e8da0 2111 ifmgd->flags = 0;
34a3740d 2112 mutex_lock(&local->mtx);
028e8da0 2113 ieee80211_vif_release_channel(sdata);
59af6928
MK		 2114
2115 sdata->vif.csa_active = false;
0c21e632 2116 ifmgd->csa_waiting_bcn = false;
f84eaa10 2117 ifmgd->csa_ignored_same_chan = false;
a46992b4
LC		 2118 if (sdata->csa_block_tx) {
2119 ieee80211_wake_vif_queues(local, sdata,
2120 IEEE80211_QUEUE_STOP_REASON_CSA);
2121 sdata->csa_block_tx = false;
2122 }
34a3740d 2123 mutex_unlock(&local->mtx);
2475b1cc 2124
02219b3a
JB		 2125 /* existing TX TSPEC sessions no longer exist */
2126 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
2127 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
2128
2475b1cc 2129 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
aa458d17 2130}
f0706e82 2131
3cf335d5
KV		 2132void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
2133 struct ieee80211_hdr *hdr)
2134{
2135 /*
2136 * We can postpone the mgd.timer whenever receiving unicast frames
2137 * from AP because we know that the connection is working both ways
2138 * at that time. But multicast frames (and hence also beacons) must
2139 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 2140 * data idle periods for sending the periodic probe request to the
2141 * AP we're connected to.
3cf335d5 2142 */
b291ba11
JB		 2143 if (is_multicast_ether_addr(hdr->addr1))
2144 return;
2145
be099e82 2146 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 2147}
f0706e82 2148
4e5ff376
FF		 2149static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
2150{
2151 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
133d40f9 2152 struct ieee80211_local *local = sdata->local;
4e5ff376 2153
133d40f9 2154 mutex_lock(&local->mtx);
392b9ffb
SG		 2155 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
2156 goto out;
4e5ff376 2157
925e64c3 2158 __ieee80211_stop_poll(sdata);
133d40f9
SG		 2159
2160 mutex_lock(&local->iflist_mtx);
2161 ieee80211_recalc_ps(local, -1);
2162 mutex_unlock(&local->iflist_mtx);
4e5ff376
FF		 2163
2164 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
133d40f9 2165 goto out;
4e5ff376
FF		 2166
2167 /*
2168 * We've received a probe response, but are not sure whether
2169 * we have or will be receiving any beacons or data, so let's
2170 * schedule the timers again, just in case.
2171 */
2172 ieee80211_sta_reset_beacon_monitor(sdata);
2173
2174 mod_timer(&ifmgd->conn_mon_timer,
2175 round_jiffies_up(jiffies +
2176 IEEE80211_CONNECTION_IDLE_TIME));
133d40f9 2177out:
133d40f9 2178 mutex_unlock(&local->mtx);
4e5ff376
FF		 2179}
2180
02219b3a
JB		 2181static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
2182 struct ieee80211_hdr *hdr,
2183 u16 tx_time)
2184{
2185 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2186 u16 tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
2187 int ac = ieee80211_ac_from_tid(tid);
2188 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
2189 unsigned long now = jiffies;
2190
2191 if (likely(!tx_tspec->admitted_time))
2192 return;
2193
2194 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2195 tx_tspec->consumed_tx_time = 0;
2196 tx_tspec->time_slice_start = now;
2197
2198 if (tx_tspec->downgraded) {
2199 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
2200 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2201 }
2202 }
2203
2204 if (tx_tspec->downgraded)
2205 return;
2206
2207 tx_tspec->consumed_tx_time += tx_time;
2208
2209 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
2210 tx_tspec->downgraded = true;
2211 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
2212 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2213 }
2214}
2215
4e5ff376 2216void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
02219b3a 2217 struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
4e5ff376 2218{
02219b3a
JB		 2219 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
2220
75706d0e 2221 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF		 2222 return;
2223
4e5ff376
FF		 2224 if (ieee80211_is_nullfunc(hdr->frame_control) &&
2225 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e 2226 if (ack)
cab1c7fd 2227 ieee80211_sta_reset_conn_monitor(sdata);
04ac3c0e
FF		 2228 else
2229 sdata->u.mgd.nullfunc_failed = true;
4e5ff376 2230 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
cab1c7fd 2231 return;
4e5ff376 2232 }
cab1c7fd
WD		 2233
2234 if (ack)
2235 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF		 2236}
2237
a43abf29
ML		 2238static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2239{
2240 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2241 const u8 *ssid;
f01a067d 2242 u8 *dst = ifmgd->associated->bssid;
180205bd 2243 u8 unicast_limit = max(1, max_probe_tries - 3);
f01a067d
LR		 2244
2245 /*
2246 * Try sending broadcast probe requests for the last three
2247 * probe requests after the first ones failed since some
2248 * buggy APs only support broadcast probe requests.
2249 */
2250 if (ifmgd->probe_send_count >= unicast_limit)
2251 dst = NULL;
a43abf29 2252
4e5ff376
FF		 2253 /*
2254 * When the hardware reports an accurate Tx ACK status, it's
2255 * better to send a nullfunc frame instead of a probe request,
2256 * as it will kick us off the AP quickly if we aren't associated
2257 * anymore. The timeout will be reset if the frame is ACKed by
2258 * the AP.
2259 */
992e68bf
SD		 2260 ifmgd->probe_send_count++;
2261
04ac3c0e
FF		 2262 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2263 ifmgd->nullfunc_failed = false;
4e5ff376 2264 ieee80211_send_nullfunc(sdata->local, sdata, 0);
04ac3c0e 2265 } else {
88c868c4
SG		 2266 int ssid_len;
2267
9caf0364 2268 rcu_read_lock();
4e5ff376 2269 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
88c868c4
SG		 2270 if (WARN_ON_ONCE(ssid == NULL))
2271 ssid_len = 0;
2272 else
2273 ssid_len = ssid[1];
2274
a73f8e21 2275 ieee80211_send_probe_req(sdata, sdata->vif.addr, dst,
a344d677 2276 ssid + 2, ssid_len, NULL,
1672c0e3 2277 0, (u32) -1, true, 0,
55de908a 2278 ifmgd->associated->channel, false);
9caf0364 2279 rcu_read_unlock();
4e5ff376 2280 }
a43abf29 2281
180205bd 2282 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
8d61ffa5 2283 run_again(sdata, ifmgd->probe_timeout);
a43abf29
ML		 2284}
2285
b291ba11
JB		 2286static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2287 bool beacon)
04de8381 2288{
04de8381 2289 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 2290 bool already = false;
34bfc411 2291
9607e6b6 2292 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 2293 return;
2294
8d61ffa5 2295 sdata_lock(sdata);
77fdaa12
JB		 2296
2297 if (!ifmgd->associated)
2298 goto out;
2299
133d40f9
SG		 2300 mutex_lock(&sdata->local->mtx);
2301
2302 if (sdata->local->tmp_channel || sdata->local->scanning) {
2303 mutex_unlock(&sdata->local->mtx);
2304 goto out;
2305 }
2306
a13fbe54 2307 if (beacon) {
bdcbd8e0 2308 mlme_dbg_ratelimited(sdata,
59c1ec2b
BG		 2309 "detected beacon loss from AP (missed %d beacons) - probing\n",
2310 beacon_loss_count);
bdcbd8e0 2311
98f03342 2312 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
a13fbe54 2313 }
04de8381 2314
b291ba11
JB		 2315 /*
2316 * The driver/our work has already reported this event or the
2317 * connection monitoring has kicked in and we have already sent
2318 * a probe request. Or maybe the AP died and the driver keeps
2319 * reporting until we disassociate...
2320 *
2321 * In either case we have to ignore the current call to this
2322 * function (except for setting the correct probe reason bit)
2323 * because otherwise we would reset the timer every time and
2324 * never check whether we received a probe response!
2325 */
392b9ffb 2326 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
b291ba11
JB		 2327 already = true;
2328
12b5f34d
EP		 2329 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2330
133d40f9
SG		 2331 mutex_unlock(&sdata->local->mtx);
2332
b291ba11
JB		 2333 if (already)
2334 goto out;
2335
4e751843
JB		 2336 mutex_lock(&sdata->local->iflist_mtx);
2337 ieee80211_recalc_ps(sdata->local, -1);
2338 mutex_unlock(&sdata->local->iflist_mtx);
2339
a43abf29
ML		 2340 ifmgd->probe_send_count = 0;
2341 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12 2342 out:
8d61ffa5 2343 sdata_unlock(sdata);
04de8381
KV		 2344}
2345
a619a4c0
JO		 2346struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2347 struct ieee80211_vif *vif)
2348{
2349 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2350 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d9b3b28b 2351 struct cfg80211_bss *cbss;
a619a4c0
JO		 2352 struct sk_buff *skb;
2353 const u8 *ssid;
88c868c4 2354 int ssid_len;
a619a4c0
JO		 2355
2356 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2357 return NULL;
2358
8d61ffa5 2359 sdata_assert_lock(sdata);
a619a4c0 2360
d9b3b28b
EP		 2361 if (ifmgd->associated)
2362 cbss = ifmgd->associated;
2363 else if (ifmgd->auth_data)
2364 cbss = ifmgd->auth_data->bss;
2365 else if (ifmgd->assoc_data)
2366 cbss = ifmgd->assoc_data->bss;
2367 else
a619a4c0
JO		 2368 return NULL;
2369
9caf0364 2370 rcu_read_lock();
d9b3b28b 2371 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
88c868c4
SG		 2372 if (WARN_ON_ONCE(ssid == NULL))
2373 ssid_len = 0;
2374 else
2375 ssid_len = ssid[1];
2376
a344d677 2377 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
55de908a 2378 (u32) -1, cbss->channel,
6b77863b 2379 ssid + 2, ssid_len,
85a237fe 2380 NULL, 0, true);
9caf0364 2381 rcu_read_unlock();
a619a4c0
JO		 2382
2383 return skb;
2384}
2385EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2386
a90faa9d
EG		 2387static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata,
2388 const u8 *buf, size_t len, bool tx,
2389 u16 reason)
2390{
2391 struct ieee80211_event event = {
2392 .type = MLME_EVENT,
2393 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT,
2394 .u.mlme.reason = reason,
2395 };
2396
2397 if (tx)
2398 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len);
2399 else
2400 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len);
2401
2402 drv_event_callback(sdata->local, sdata, &event);
2403}
2404
eef9e54c 2405static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
1e4dcd01 2406{
59af6928 2407 struct ieee80211_local *local = sdata->local;
1e4dcd01 2408 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 2409 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
1e4dcd01 2410
8d61ffa5 2411 sdata_lock(sdata);
1e4dcd01 2412 if (!ifmgd->associated) {
8d61ffa5 2413 sdata_unlock(sdata);
1e4dcd01
JO		 2414 return;
2415 }
2416
37ad3888
JB		 2417 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2418 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
eef9e54c 2419 true, frame_buf);
59af6928 2420 mutex_lock(&local->mtx);
7578d575 2421 sdata->vif.csa_active = false;
0c21e632 2422 ifmgd->csa_waiting_bcn = false;
a46992b4
LC		 2423 if (sdata->csa_block_tx) {
2424 ieee80211_wake_vif_queues(local, sdata,
2425 IEEE80211_QUEUE_STOP_REASON_CSA);
2426 sdata->csa_block_tx = false;
2427 }
59af6928 2428 mutex_unlock(&local->mtx);
7da7cc1d 2429
a90faa9d
EG		 2430 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
2431 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2432
8d61ffa5 2433 sdata_unlock(sdata);
1e4dcd01
JO		 2434}
2435
cc74c0c7 2436static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 2437{
2438 struct ieee80211_sub_if_data *sdata =
2439 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 2440 u.mgd.beacon_connection_loss_work);
a85e1d55
PS		 2441 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2442 struct sta_info *sta;
2443
2444 if (ifmgd->associated) {
30fa9047 2445 rcu_read_lock();
a85e1d55
PS		 2446 sta = sta_info_get(sdata, ifmgd->bssid);
2447 if (sta)
2448 sta->beacon_loss_count++;
30fa9047 2449 rcu_read_unlock();
a85e1d55 2450 }
b291ba11 2451
682bd38b 2452 if (ifmgd->connection_loss) {
882a7c69
JB		 2453 sdata_info(sdata, "Connection to AP %pM lost\n",
2454 ifmgd->bssid);
eef9e54c 2455 __ieee80211_disconnect(sdata);
882a7c69 2456 } else {
1e4dcd01 2457 ieee80211_mgd_probe_ap(sdata, true);
882a7c69
JB		 2458 }
2459}
2460
2461static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2462{
2463 struct ieee80211_sub_if_data *sdata =
2464 container_of(work, struct ieee80211_sub_if_data,
2465 u.mgd.csa_connection_drop_work);
2466
eef9e54c 2467 __ieee80211_disconnect(sdata);
b291ba11
JB		 2468}
2469
04de8381
KV		 2470void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2471{
2472 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 2473 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 2474
b5878a2d
JB		 2475 trace_api_beacon_loss(sdata);
2476
682bd38b 2477 sdata->u.mgd.connection_loss = false;
1e4dcd01 2478 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 2479}
2480EXPORT_SYMBOL(ieee80211_beacon_loss);
2481
1e4dcd01
JO		 2482void ieee80211_connection_loss(struct ieee80211_vif *vif)
2483{
2484 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2485 struct ieee80211_hw *hw = &sdata->local->hw;
2486
b5878a2d
JB		 2487 trace_api_connection_loss(sdata);
2488
682bd38b 2489 sdata->u.mgd.connection_loss = true;
1e4dcd01
JO		 2490 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2491}
2492EXPORT_SYMBOL(ieee80211_connection_loss);
2493
2494
66e67e41
JB		 2495static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2496 bool assoc)
2497{
2498 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2499
8d61ffa5 2500 sdata_assert_lock(sdata);
66e67e41 2501
66e67e41 2502 if (!assoc) {
c1e140bf
EG		 2503 /*
2504 * we are not authenticated yet, the only timer that could be
2505 * running is the timeout for the authentication response which
2506 * which is not relevant anymore.
2507 */
2508 del_timer_sync(&sdata->u.mgd.timer);
66e67e41
JB		 2509 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2510
c84a67a2 2511 eth_zero_addr(sdata->u.mgd.bssid);
66e67e41 2512 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
028e8da0 2513 sdata->u.mgd.flags = 0;
34a3740d 2514 mutex_lock(&sdata->local->mtx);
55de908a 2515 ieee80211_vif_release_channel(sdata);
34a3740d 2516 mutex_unlock(&sdata->local->mtx);
66e67e41
JB		 2517 }
2518
5b112d3d 2519 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
66e67e41
JB		 2520 kfree(auth_data);
2521 sdata->u.mgd.auth_data = NULL;
2522}
2523
2524static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2525 struct ieee80211_mgmt *mgmt, size_t len)
2526{
1672c0e3 2527 struct ieee80211_local *local = sdata->local;
66e67e41
JB		 2528 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2529 u8 *pos;
2530 struct ieee802_11_elems elems;
1672c0e3 2531 u32 tx_flags = 0;
66e67e41
JB		 2532
2533 pos = mgmt->u.auth.variable;
b2e506bf 2534 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
66e67e41
JB		 2535 if (!elems.challenge)
2536 return;
2537 auth_data->expected_transaction = 4;
a1845fc7 2538 drv_mgd_prepare_tx(sdata->local, sdata);
1672c0e3
JB		 2539 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2540 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2541 IEEE80211_TX_INTFL_MLME_CONN_TX;
700e8ea6 2542 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
66e67e41
JB		 2543 elems.challenge - 2, elems.challenge_len + 2,
2544 auth_data->bss->bssid, auth_data->bss->bssid,
2545 auth_data->key, auth_data->key_len,
1672c0e3 2546 auth_data->key_idx, tx_flags);
66e67e41
JB		 2547}
2548
8d61ffa5
JB		 2549static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2550 struct ieee80211_mgmt *mgmt, size_t len)
66e67e41
JB		 2551{
2552 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2553 u8 bssid[ETH_ALEN];
2554 u16 auth_alg, auth_transaction, status_code;
2555 struct sta_info *sta;
a9409093
EG		 2556 struct ieee80211_event event = {
2557 .type = MLME_EVENT,
2558 .u.mlme.data = AUTH_EVENT,
2559 };
66e67e41 2560
8d61ffa5 2561 sdata_assert_lock(sdata);
66e67e41
JB		 2562
2563 if (len < 24 + 6)
8d61ffa5 2564 return;
66e67e41
JB		 2565
2566 if (!ifmgd->auth_data || ifmgd->auth_data->done)
8d61ffa5 2567 return;
66e67e41
JB		 2568
2569 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2570
b203ca39 2571 if (!ether_addr_equal(bssid, mgmt->bssid))
8d61ffa5 2572 return;
66e67e41
JB		 2573
2574 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2575 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2576 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2577
2578 if (auth_alg != ifmgd->auth_data->algorithm ||
0f4126e8
JM		 2579 auth_transaction != ifmgd->auth_data->expected_transaction) {
2580 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2581 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2582 auth_transaction,
2583 ifmgd->auth_data->expected_transaction);
8d61ffa5 2584 return;
0f4126e8 2585 }
66e67e41
JB		 2586
2587 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2588 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2589 mgmt->sa, status_code);
dac211ec 2590 ieee80211_destroy_auth_data(sdata, false);
6ff57cf8 2591 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
a9409093
EG		 2592 event.u.mlme.status = MLME_DENIED;
2593 event.u.mlme.reason = status_code;
2594 drv_event_callback(sdata->local, sdata, &event);
8d61ffa5 2595 return;
66e67e41
JB		 2596 }
2597
2598 switch (ifmgd->auth_data->algorithm) {
2599 case WLAN_AUTH_OPEN:
2600 case WLAN_AUTH_LEAP:
2601 case WLAN_AUTH_FT:
6b8ece3a 2602 case WLAN_AUTH_SAE:
66e67e41
JB		 2603 break;
2604 case WLAN_AUTH_SHARED_KEY:
2605 if (ifmgd->auth_data->expected_transaction != 4) {
2606 ieee80211_auth_challenge(sdata, mgmt, len);
2607 /* need another frame */
8d61ffa5 2608 return;
66e67e41
JB		 2609 }
2610 break;
2611 default:
2612 WARN_ONCE(1, "invalid auth alg %d",
2613 ifmgd->auth_data->algorithm);
8d61ffa5 2614 return;
66e67e41
JB		 2615 }
2616
a9409093
EG		 2617 event.u.mlme.status = MLME_SUCCESS;
2618 drv_event_callback(sdata->local, sdata, &event);
bdcbd8e0 2619 sdata_info(sdata, "authenticated\n");
66e67e41
JB		 2620 ifmgd->auth_data->done = true;
2621 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
89afe614 2622 ifmgd->auth_data->timeout_started = true;
8d61ffa5 2623 run_again(sdata, ifmgd->auth_data->timeout);
66e67e41 2624
6b8ece3a
JM		 2625 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2626 ifmgd->auth_data->expected_transaction != 2) {
2627 /*
2628 * Report auth frame to user space for processing since another
2629 * round of Authentication frames is still needed.
2630 */
6ff57cf8 2631 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
8d61ffa5 2632 return;
6b8ece3a
JM		 2633 }
2634
66e67e41
JB		 2635 /* move station state to auth */
2636 mutex_lock(&sdata->local->sta_mtx);
2637 sta = sta_info_get(sdata, bssid);
2638 if (!sta) {
2639 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2640 goto out_err;
2641 }
2642 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
bdcbd8e0 2643 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
66e67e41
JB		 2644 goto out_err;
2645 }
2646 mutex_unlock(&sdata->local->sta_mtx);
2647
6ff57cf8 2648 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
8d61ffa5 2649 return;
66e67e41
JB		 2650 out_err:
2651 mutex_unlock(&sdata->local->sta_mtx);
2652 /* ignore frame -- wait for timeout */
66e67e41
JB		 2653}
2654
dfa1ad29
CO		 2655#define case_WLAN(type) \
2656 case WLAN_REASON_##type: return #type
2657
2658static const char *ieee80211_get_reason_code_string(u16 reason_code)
2659{
2660 switch (reason_code) {
2661 case_WLAN(UNSPECIFIED);
2662 case_WLAN(PREV_AUTH_NOT_VALID);
2663 case_WLAN(DEAUTH_LEAVING);
2664 case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2665 case_WLAN(DISASSOC_AP_BUSY);
2666 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2667 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2668 case_WLAN(DISASSOC_STA_HAS_LEFT);
2669 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2670 case_WLAN(DISASSOC_BAD_POWER);
2671 case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2672 case_WLAN(INVALID_IE);
2673 case_WLAN(MIC_FAILURE);
2674 case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2675 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2676 case_WLAN(IE_DIFFERENT);
2677 case_WLAN(INVALID_GROUP_CIPHER);
2678 case_WLAN(INVALID_PAIRWISE_CIPHER);
2679 case_WLAN(INVALID_AKMP);
2680 case_WLAN(UNSUPP_RSN_VERSION);
2681 case_WLAN(INVALID_RSN_IE_CAP);
2682 case_WLAN(IEEE8021X_FAILED);
2683 case_WLAN(CIPHER_SUITE_REJECTED);
2684 case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2685 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2686 case_WLAN(DISASSOC_LOW_ACK);
2687 case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2688 case_WLAN(QSTA_LEAVE_QBSS);
2689 case_WLAN(QSTA_NOT_USE);
2690 case_WLAN(QSTA_REQUIRE_SETUP);
2691 case_WLAN(QSTA_TIMEOUT);
2692 case_WLAN(QSTA_CIPHER_NOT_SUPP);
2693 case_WLAN(MESH_PEER_CANCELED);
2694 case_WLAN(MESH_MAX_PEERS);
2695 case_WLAN(MESH_CONFIG);
2696 case_WLAN(MESH_CLOSE);
2697 case_WLAN(MESH_MAX_RETRIES);
2698 case_WLAN(MESH_CONFIRM_TIMEOUT);
2699 case_WLAN(MESH_INVALID_GTK);
2700 case_WLAN(MESH_INCONSISTENT_PARAM);
2701 case_WLAN(MESH_INVALID_SECURITY);
2702 case_WLAN(MESH_PATH_ERROR);
2703 case_WLAN(MESH_PATH_NOFORWARD);
2704 case_WLAN(MESH_PATH_DEST_UNREACHABLE);
2705 case_WLAN(MAC_EXISTS_IN_MBSS);
2706 case_WLAN(MESH_CHAN_REGULATORY);
2707 case_WLAN(MESH_CHAN);
2708 default: return "<unknown>";
2709 }
2710}
66e67e41 2711
8d61ffa5
JB		 2712static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2713 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2714{
46900298 2715 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
77fdaa12 2716 const u8 *bssid = NULL;
f0706e82
JB		 2717 u16 reason_code;
2718
8d61ffa5 2719 sdata_assert_lock(sdata);
66e67e41 2720
f4ea83dd 2721 if (len < 24 + 2)
8d61ffa5 2722 return;
f0706e82 2723
66e67e41 2724 if (!ifmgd->associated ||
b203ca39 2725 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
8d61ffa5 2726 return;
77fdaa12 2727
0c1ad2ca 2728 bssid = ifmgd->associated->bssid;
f0706e82
JB		 2729
2730 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2731
dfa1ad29
CO		 2732 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
2733 bssid, reason_code, ieee80211_get_reason_code_string(reason_code));
77fdaa12 2734
37ad3888
JB		 2735 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2736
a90faa9d 2737 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code);
f0706e82
JB		 2738}
2739
2740
8d61ffa5
JB		 2741static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2742 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2743{
46900298 2744 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 2745 u16 reason_code;
2746
8d61ffa5 2747 sdata_assert_lock(sdata);
77fdaa12 2748
66e67e41 2749 if (len < 24 + 2)
8d61ffa5 2750 return;
77fdaa12 2751
66e67e41 2752 if (!ifmgd->associated ||
b203ca39 2753 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
8d61ffa5 2754 return;
f0706e82
JB		 2755
2756 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2757
bdcbd8e0
JB		 2758 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2759 mgmt->sa, reason_code);
f0706e82 2760
37ad3888
JB		 2761 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2762
a90faa9d 2763 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code);
f0706e82
JB		 2764}
2765
c74d084f
CL		 2766static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2767 u8 *supp_rates, unsigned int supp_rates_len,
2768 u32 *rates, u32 *basic_rates,
2769 bool *have_higher_than_11mbit,
2103dec1
SW		 2770 int *min_rate, int *min_rate_index,
2771 int shift, u32 rate_flags)
c74d084f
CL		 2772{
2773 int i, j;
2774
2775 for (i = 0; i < supp_rates_len; i++) {
2103dec1 2776 int rate = supp_rates[i] & 0x7f;
c74d084f
CL		 2777 bool is_basic = !!(supp_rates[i] & 0x80);
2778
2103dec1 2779 if ((rate * 5 * (1 << shift)) > 110)
c74d084f
CL		 2780 *have_higher_than_11mbit = true;
2781
2782 /*
2783 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2784 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2785 *
2786 * Note: Even through the membership selector and the basic
2787 * rate flag share the same bit, they are not exactly
2788 * the same.
2789 */
2790 if (!!(supp_rates[i] & 0x80) &&
2791 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2792 continue;
2793
2794 for (j = 0; j < sband->n_bitrates; j++) {
2103dec1
SW		 2795 struct ieee80211_rate *br;
2796 int brate;
2797
2798 br = &sband->bitrates[j];
2799 if ((rate_flags & br->flags) != rate_flags)
2800 continue;
2801
2802 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2803 if (brate == rate) {
c74d084f
CL		 2804 *rates |= BIT(j);
2805 if (is_basic)
2806 *basic_rates |= BIT(j);
2103dec1
SW		 2807 if ((rate * 5) < *min_rate) {
2808 *min_rate = rate * 5;
c74d084f
CL		 2809 *min_rate_index = j;
2810 }
2811 break;
2812 }
2813 }
2814 }
2815}
f0706e82 2816
66e67e41
JB		 2817static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2818 bool assoc)
2819{
2820 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2821
8d61ffa5 2822 sdata_assert_lock(sdata);
66e67e41 2823
66e67e41 2824 if (!assoc) {
c1e140bf
EG		 2825 /*
2826 * we are not associated yet, the only timer that could be
2827 * running is the timeout for the association response which
2828 * which is not relevant anymore.
2829 */
2830 del_timer_sync(&sdata->u.mgd.timer);
66e67e41
JB		 2831 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2832
c84a67a2 2833 eth_zero_addr(sdata->u.mgd.bssid);
66e67e41 2834 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
028e8da0 2835 sdata->u.mgd.flags = 0;
34a3740d 2836 mutex_lock(&sdata->local->mtx);
55de908a 2837 ieee80211_vif_release_channel(sdata);
34a3740d 2838 mutex_unlock(&sdata->local->mtx);
66e67e41
JB		 2839 }
2840
2841 kfree(assoc_data);
2842 sdata->u.mgd.assoc_data = NULL;
2843}
2844
2845static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2846 struct cfg80211_bss *cbss,
af6b6374 2847 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2848{
46900298 2849 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 2850 struct ieee80211_local *local = sdata->local;
8318d78a 2851 struct ieee80211_supported_band *sband;
f0706e82 2852 struct sta_info *sta;
af6b6374 2853 u8 *pos;
af6b6374 2854 u16 capab_info, aid;
f0706e82 2855 struct ieee802_11_elems elems;
bda3933a 2856 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
35d865af
JB		 2857 const struct cfg80211_bss_ies *bss_ies = NULL;
2858 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
ae5eb026 2859 u32 changed = 0;
c74d084f 2860 int err;
35d865af 2861 bool ret;
f0706e82 2862
af6b6374 2863 /* AssocResp and ReassocResp have identical structure */
f0706e82 2864
f0706e82 2865 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 2866 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 2867
1dd84aa2 2868 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
bdcbd8e0
JB		 2869 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2870 aid);
1dd84aa2
JB		 2871 aid &= ~(BIT(15) | BIT(14));
2872
05cb9108
JB		 2873 ifmgd->broken_ap = false;
2874
2875 if (aid == 0 || aid > IEEE80211_MAX_AID) {
bdcbd8e0
JB		 2876 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2877 aid);
05cb9108
JB		 2878 aid = 0;
2879 ifmgd->broken_ap = true;
2880 }
2881
af6b6374 2882 pos = mgmt->u.assoc_resp.variable;
b2e506bf 2883 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
af6b6374 2884
f0706e82 2885 if (!elems.supp_rates) {
bdcbd8e0 2886 sdata_info(sdata, "no SuppRates element in AssocResp\n");
af6b6374 2887 return false;
f0706e82
JB		 2888 }
2889
46900298 2890 ifmgd->aid = aid;
9041c1fa
AN		 2891 ifmgd->tdls_chan_switch_prohibited =
2892 elems.ext_capab && elems.ext_capab_len >= 5 &&
2893 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
f0706e82 2894
35d865af
JB		 2895 /*
2896 * Some APs are erroneously not including some information in their
2897 * (re)association response frames. Try to recover by using the data
2898 * from the beacon or probe response. This seems to afflict mobile
2899 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2900 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2901 */
2902 if ((assoc_data->wmm && !elems.wmm_param) ||
2903 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2904 (!elems.ht_cap_elem || !elems.ht_operation)) ||
2905 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2906 (!elems.vht_cap_elem || !elems.vht_operation))) {
2907 const struct cfg80211_bss_ies *ies;
2908 struct ieee802_11_elems bss_elems;
2909
2910 rcu_read_lock();
2911 ies = rcu_dereference(cbss->ies);
2912 if (ies)
2913 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2914 GFP_ATOMIC);
2915 rcu_read_unlock();
2916 if (!bss_ies)
2917 return false;
2918
2919 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2920 false, &bss_elems);
2921 if (assoc_data->wmm &&
2922 !elems.wmm_param && bss_elems.wmm_param) {
2923 elems.wmm_param = bss_elems.wmm_param;
2924 sdata_info(sdata,
2925 "AP bug: WMM param missing from AssocResp\n");
2926 }
2927
2928 /*
2929 * Also check if we requested HT/VHT, otherwise the AP doesn't
2930 * have to include the IEs in the (re)association response.
2931 */
2932 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2933 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2934 elems.ht_cap_elem = bss_elems.ht_cap_elem;
2935 sdata_info(sdata,
2936 "AP bug: HT capability missing from AssocResp\n");
2937 }
2938 if (!elems.ht_operation && bss_elems.ht_operation &&
2939 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2940 elems.ht_operation = bss_elems.ht_operation;
2941 sdata_info(sdata,
2942 "AP bug: HT operation missing from AssocResp\n");
2943 }
2944 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2945 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2946 elems.vht_cap_elem = bss_elems.vht_cap_elem;
2947 sdata_info(sdata,
2948 "AP bug: VHT capa missing from AssocResp\n");
2949 }
2950 if (!elems.vht_operation && bss_elems.vht_operation &&
2951 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2952 elems.vht_operation = bss_elems.vht_operation;
2953 sdata_info(sdata,
2954 "AP bug: VHT operation missing from AssocResp\n");
2955 }
2956 }
2957
30eb1dc2
JB		 2958 /*
2959 * We previously checked these in the beacon/probe response, so
2960 * they should be present here. This is just a safety net.
2961 */
2962 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2963 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2964 sdata_info(sdata,
35d865af
JB		 2965 "HT AP is missing WMM params or HT capability/operation\n");
2966 ret = false;
2967 goto out;
30eb1dc2
JB		 2968 }
2969
2970 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2971 (!elems.vht_cap_elem || !elems.vht_operation)) {
2972 sdata_info(sdata,
35d865af
JB		 2973 "VHT AP is missing VHT capability/operation\n");
2974 ret = false;
2975 goto out;
30eb1dc2
JB		 2976 }
2977
2a33bee2
GE		 2978 mutex_lock(&sdata->local->sta_mtx);
2979 /*
2980 * station info was already allocated and inserted before
2981 * the association and should be available to us
2982 */
7852e361 2983 sta = sta_info_get(sdata, cbss->bssid);
2a33bee2
GE		 2984 if (WARN_ON(!sta)) {
2985 mutex_unlock(&sdata->local->sta_mtx);
35d865af
JB		 2986 ret = false;
2987 goto out;
77fdaa12 2988 }
05e5e883 2989
55de908a 2990 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
f709fc69 2991
30eb1dc2 2992 /* Set up internal HT/VHT capabilities */
a8243b72 2993 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
ef96a842 2994 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
e1a0c6b3 2995 elems.ht_cap_elem, sta);
64f68e5d 2996
818255ea
MP		 2997 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2998 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
4a34215e 2999 elems.vht_cap_elem, sta);
818255ea 3000
30eb1dc2
JB		 3001 /*
3002 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
3003 * in their association response, so ignore that data for our own
3004 * configuration. If it changed since the last beacon, we'll get the
3005 * next beacon and update then.
3006 */
1128958d 3007
bee7f586
JB		 3008 /*
3009 * If an operating mode notification IE is present, override the
3010 * NSS calculation (that would be done in rate_control_rate_init())
3011 * and use the # of streams from that element.
3012 */
3013 if (elems.opmode_notif &&
3014 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
3015 u8 nss;
3016
3017 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
3018 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
3019 nss += 1;
3020 sta->sta.rx_nss = nss;
3021 }
3022
4b7679a5 3023 rate_control_rate_init(sta);
f0706e82 3024
64a8cef4 3025 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) {
c2c98fde 3026 set_sta_flag(sta, WLAN_STA_MFP);
64a8cef4
SJ		 3027 sta->sta.mfp = true;
3028 } else {
3029 sta->sta.mfp = false;
3030 }
5394af4d 3031
527871d7 3032 sta->sta.wme = elems.wmm_param && local->hw.queues >= IEEE80211_NUM_ACS;
ddf4ac53 3033
3e4d40fa 3034 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
c8987876
JB		 3035 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
3036 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
3037 if (err) {
bdcbd8e0
JB		 3038 sdata_info(sdata,
3039 "failed to move station %pM to desired state\n",
3040 sta->sta.addr);
c8987876
JB		 3041 WARN_ON(__sta_info_destroy(sta));
3042 mutex_unlock(&sdata->local->sta_mtx);
35d865af
JB		 3043 ret = false;
3044 goto out;
c8987876
JB		 3045 }
3046
7852e361 3047 mutex_unlock(&sdata->local->sta_mtx);
ddf4ac53 3048
f2176d72
JO		 3049 /*
3050 * Always handle WMM once after association regardless
3051 * of the first value the AP uses. Setting -1 here has
3052 * that effect because the AP values is an unsigned
3053 * 4-bit value.
3054 */
3055 ifmgd->wmm_last_param_set = -1;
3056
095d81ce 3057 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && elems.wmm_param)
4ced3f74 3058 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 3059 elems.wmm_param_len);
aa837e1d 3060 else
3abead59
JB		 3061 ieee80211_set_wmm_default(sdata, false);
3062 changed |= BSS_CHANGED_QOS;
f0706e82 3063
60f8b39c
JB		 3064 /* set AID and assoc capability,
3065 * ieee80211_set_associated() will tell the driver */
3066 bss_conf->aid = aid;
3067 bss_conf->assoc_capability = capab_info;
0c1ad2ca 3068 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 3069
d524215f
FF		 3070 /*
3071 * If we're using 4-addr mode, let the AP know that we're
3072 * doing so, so that it can create the STA VLAN on its side
3073 */
3074 if (ifmgd->use_4addr)
3075 ieee80211_send_4addr_nullfunc(local, sdata);
3076
15b7b062 3077 /*
b291ba11
JB		 3078 * Start timer to probe the connection to the AP now.
3079 * Also start the timer that will detect beacon loss.
15b7b062 3080 */
b291ba11 3081 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 3082 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 3083
35d865af
JB		 3084 ret = true;
3085 out:
3086 kfree(bss_ies);
3087 return ret;
f0706e82
JB		 3088}
3089
8d61ffa5
JB		 3090static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
3091 struct ieee80211_mgmt *mgmt,
3092 size_t len)
66e67e41
JB		 3093{
3094 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3095 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3096 u16 capab_info, status_code, aid;
3097 struct ieee802_11_elems elems;
b0b6aa2c 3098 int ac, uapsd_queues = -1;
66e67e41
JB		 3099 u8 *pos;
3100 bool reassoc;
8d61ffa5 3101 struct cfg80211_bss *bss;
d0d1a12f
EG		 3102 struct ieee80211_event event = {
3103 .type = MLME_EVENT,
3104 .u.mlme.data = ASSOC_EVENT,
3105 };
66e67e41 3106
8d61ffa5 3107 sdata_assert_lock(sdata);
66e67e41
JB		 3108
3109 if (!assoc_data)
8d61ffa5 3110 return;
b203ca39 3111 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
8d61ffa5 3112 return;
66e67e41
JB		 3113
3114 /*
3115 * AssocResp and ReassocResp have identical structure, so process both
3116 * of them in this function.
3117 */
3118
3119 if (len < 24 + 6)
8d61ffa5 3120 return;
66e67e41
JB		 3121
3122 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
3123 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3124 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
3125 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3126
bdcbd8e0
JB		 3127 sdata_info(sdata,
3128 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3129 reassoc ? "Rea" : "A", mgmt->sa,
3130 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
66e67e41
JB		 3131
3132 pos = mgmt->u.assoc_resp.variable;
b2e506bf 3133 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
66e67e41
JB		 3134
3135 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
79ba1d89
JB		 3136 elems.timeout_int &&
3137 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
66e67e41 3138 u32 tu, ms;
79ba1d89 3139 tu = le32_to_cpu(elems.timeout_int->value);
66e67e41 3140 ms = tu * 1024 / 1000;
bdcbd8e0
JB		 3141 sdata_info(sdata,
3142 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3143 mgmt->sa, tu, ms);
66e67e41 3144 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
89afe614 3145 assoc_data->timeout_started = true;
66e67e41 3146 if (ms > IEEE80211_ASSOC_TIMEOUT)
8d61ffa5
JB		 3147 run_again(sdata, assoc_data->timeout);
3148 return;
66e67e41
JB		 3149 }
3150
8d61ffa5 3151 bss = assoc_data->bss;
66e67e41
JB		 3152
3153 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 3154 sdata_info(sdata, "%pM denied association (code=%d)\n",
3155 mgmt->sa, status_code);
66e67e41 3156 ieee80211_destroy_assoc_data(sdata, false);
d0d1a12f
EG		 3157 event.u.mlme.status = MLME_DENIED;
3158 event.u.mlme.reason = status_code;
3159 drv_event_callback(sdata->local, sdata, &event);
66e67e41 3160 } else {
8d61ffa5 3161 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
66e67e41 3162 /* oops -- internal error -- send timeout for now */
10a9109f 3163 ieee80211_destroy_assoc_data(sdata, false);
959867fa 3164 cfg80211_assoc_timeout(sdata->dev, bss);
8d61ffa5 3165 return;
66e67e41 3166 }
d0d1a12f
EG		 3167 event.u.mlme.status = MLME_SUCCESS;
3168 drv_event_callback(sdata->local, sdata, &event);
635d999f 3169 sdata_info(sdata, "associated\n");
79ebfb85
JB		 3170
3171 /*
3172 * destroy assoc_data afterwards, as otherwise an idle
3173 * recalc after assoc_data is NULL but before associated
3174 * is set can cause the interface to go idle
3175 */
3176 ieee80211_destroy_assoc_data(sdata, true);
b0b6aa2c
EP		 3177
3178 /* get uapsd queues configuration */
3179 uapsd_queues = 0;
3180 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
3181 if (sdata->tx_conf[ac].uapsd)
3182 uapsd_queues |= BIT(ac);
66e67e41
JB		 3183 }
3184
b0b6aa2c 3185 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues);
66e67e41 3186}
8e3c1b77 3187
98c8fccf 3188static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
8e3c1b77 3189 struct ieee80211_mgmt *mgmt, size_t len,
98c8fccf 3190 struct ieee80211_rx_status *rx_status,
d45c4172 3191 struct ieee802_11_elems *elems)
98c8fccf
JB		 3192{
3193 struct ieee80211_local *local = sdata->local;
c2b13452 3194 struct ieee80211_bss *bss;
98c8fccf 3195 struct ieee80211_channel *channel;
56007a02 3196
8d61ffa5 3197 sdata_assert_lock(sdata);
b4f286a1 3198
3afc2167
EG		 3199 channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
3200 if (!channel)
98c8fccf
JB		 3201 return;
3202
98c8fccf 3203 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
d45c4172 3204 channel);
817cee76 3205 if (bss) {
817cee76 3206 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
d2722f8b 3207 ieee80211_rx_bss_put(local, bss);
817cee76 3208 }
f0706e82
JB		 3209}
3210
3211
f698d856 3212static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 3213 struct sk_buff *skb)
f0706e82 3214{
af6b6374 3215 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 3216 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 3217 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
3218 size_t baselen, len = skb->len;
ae6a44e3
EK		 3219 struct ieee802_11_elems elems;
3220
15b7b062
KV		 3221 ifmgd = &sdata->u.mgd;
3222
8d61ffa5 3223 sdata_assert_lock(sdata);
77fdaa12 3224
b203ca39 3225 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
8e7cdbb6
TW		 3226 return; /* ignore ProbeResp to foreign address */
3227
ae6a44e3
EK		 3228 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
3229 if (baselen > len)
3230 return;
3231
3232 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
b2e506bf 3233 false, &elems);
ae6a44e3 3234
d45c4172 3235 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
9859b81e 3236
77fdaa12 3237 if (ifmgd->associated &&
b203ca39 3238 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
4e5ff376 3239 ieee80211_reset_ap_probe(sdata);
66e67e41
JB		 3240
3241 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
b203ca39 3242 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
66e67e41 3243 /* got probe response, continue with auth */
bdcbd8e0 3244 sdata_info(sdata, "direct probe responded\n");
66e67e41
JB		 3245 ifmgd->auth_data->tries = 0;
3246 ifmgd->auth_data->timeout = jiffies;
89afe614 3247 ifmgd->auth_data->timeout_started = true;
8d61ffa5 3248 run_again(sdata, ifmgd->auth_data->timeout);
66e67e41 3249 }
f0706e82
JB		 3250}
3251
d91f36db
JB		 3252/*
3253 * This is the canonical list of information elements we care about,
3254 * the filter code also gives us all changes to the Microsoft OUI
c8d65917
SG		 3255 * (00:50:F2) vendor IE which is used for WMM which we need to track,
3256 * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3257 * changes to requested client power.
d91f36db
JB		 3258 *
3259 * We implement beacon filtering in software since that means we can
3260 * avoid processing the frame here and in cfg80211, and userspace
3261 * will not be able to tell whether the hardware supports it or not.
3262 *
3263 * XXX: This list needs to be dynamic -- userspace needs to be able to
3264 * add items it requires. It also needs to be able to tell us to
3265 * look out for other vendor IEs.
3266 */
3267static const u64 care_about_ies =
1d4df3a5
JB		 3268 (1ULL << WLAN_EID_COUNTRY) |
3269 (1ULL << WLAN_EID_ERP_INFO) |
3270 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
3271 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
3272 (1ULL << WLAN_EID_HT_CAPABILITY) |
70a3fd6c
JB		 3273 (1ULL << WLAN_EID_HT_OPERATION) |
3274 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN);
d91f36db 3275
8d61ffa5
JB		 3276static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
3277 struct ieee80211_mgmt *mgmt, size_t len,
3278 struct ieee80211_rx_status *rx_status)
f0706e82 3279{
d91f36db 3280 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 3281 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 3282 size_t baselen;
3283 struct ieee802_11_elems elems;
f698d856 3284 struct ieee80211_local *local = sdata->local;
55de908a
JB		 3285 struct ieee80211_chanctx_conf *chanctx_conf;
3286 struct ieee80211_channel *chan;
bee7f586 3287 struct sta_info *sta;
471b3efd 3288 u32 changed = 0;
f87ad637 3289 bool erp_valid;
7a5158ef 3290 u8 erp_value = 0;
d91f36db 3291 u32 ncrc;
77fdaa12 3292 u8 *bssid;
8d61ffa5 3293 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
77fdaa12 3294
8d61ffa5 3295 sdata_assert_lock(sdata);
f0706e82 3296
ae6a44e3
EK		 3297 /* Process beacon from the current BSS */
3298 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3299 if (baselen > len)
8d61ffa5 3300 return;
ae6a44e3 3301
55de908a
JB		 3302 rcu_read_lock();
3303 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3304 if (!chanctx_conf) {
3305 rcu_read_unlock();
8d61ffa5 3306 return;
55de908a
JB		 3307 }
3308
4bf88530 3309 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
55de908a 3310 rcu_read_unlock();
8d61ffa5 3311 return;
55de908a 3312 }
4bf88530 3313 chan = chanctx_conf->def.chan;
55de908a 3314 rcu_read_unlock();
f0706e82 3315
c65dd147 3316 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
b203ca39 3317 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
66e67e41 3318 ieee802_11_parse_elems(mgmt->u.beacon.variable,
b2e506bf 3319 len - baselen, false, &elems);
77fdaa12 3320
d45c4172 3321 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
482a9c74
AB		 3322 if (elems.tim && !elems.parse_error) {
3323 const struct ieee80211_tim_ie *tim_ie = elems.tim;
3324 ifmgd->dtim_period = tim_ie->dtim_period;
3325 }
989c6505 3326 ifmgd->have_beacon = true;
c65dd147 3327 ifmgd->assoc_data->need_beacon = false;
ef429dad
JB		 3328 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3329 sdata->vif.bss_conf.sync_tsf =
3330 le64_to_cpu(mgmt->u.beacon.timestamp);
3331 sdata->vif.bss_conf.sync_device_ts =
3332 rx_status->device_timestamp;
3333 if (elems.tim)
3334 sdata->vif.bss_conf.sync_dtim_count =
3335 elems.tim->dtim_count;
3336 else
3337 sdata->vif.bss_conf.sync_dtim_count = 0;
3338 }
66e67e41
JB		 3339 /* continue assoc process */
3340 ifmgd->assoc_data->timeout = jiffies;
89afe614 3341 ifmgd->assoc_data->timeout_started = true;
8d61ffa5
JB		 3342 run_again(sdata, ifmgd->assoc_data->timeout);
3343 return;
66e67e41 3344 }
77fdaa12 3345
66e67e41 3346 if (!ifmgd->associated ||
b203ca39 3347 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
8d61ffa5 3348 return;
66e67e41 3349 bssid = ifmgd->associated->bssid;
f0706e82 3350
17e4ec14
JM		 3351 /* Track average RSSI from the Beacon frames of the current AP */
3352 ifmgd->last_beacon_signal = rx_status->signal;
3353 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3354 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3ba06c6f 3355 ifmgd->ave_beacon_signal = rx_status->signal * 16;
17e4ec14 3356 ifmgd->last_cqm_event_signal = 0;
391a200a 3357 ifmgd->count_beacon_signal = 1;
615f7b9b 3358 ifmgd->last_ave_beacon_signal = 0;
17e4ec14
JM		 3359 } else {
3360 ifmgd->ave_beacon_signal =
3361 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
3362 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
3363 ifmgd->ave_beacon_signal) / 16;
391a200a 3364 ifmgd->count_beacon_signal++;
17e4ec14 3365 }
615f7b9b
MV		 3366
3367 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3368 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3369 int sig = ifmgd->ave_beacon_signal;
3370 int last_sig = ifmgd->last_ave_beacon_signal;
a8182929
EG		 3371 struct ieee80211_event event = {
3372 .type = RSSI_EVENT,
3373 };
615f7b9b
MV		 3374
3375 /*
3376 * if signal crosses either of the boundaries, invoke callback
3377 * with appropriate parameters
3378 */
3379 if (sig > ifmgd->rssi_max_thold &&
3380 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3381 ifmgd->last_ave_beacon_signal = sig;
a8182929
EG		 3382 event.u.rssi.data = RSSI_EVENT_HIGH;
3383 drv_event_callback(local, sdata, &event);
615f7b9b
MV		 3384 } else if (sig < ifmgd->rssi_min_thold &&
3385 (last_sig >= ifmgd->rssi_max_thold ||
3386 last_sig == 0)) {
3387 ifmgd->last_ave_beacon_signal = sig;
a8182929
EG		 3388 event.u.rssi.data = RSSI_EVENT_LOW;
3389 drv_event_callback(local, sdata, &event);
615f7b9b
MV		 3390 }
3391 }
3392
17e4ec14 3393 if (bss_conf->cqm_rssi_thold &&
391a200a 3394 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
ea086359 3395 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
17e4ec14
JM		 3396 int sig = ifmgd->ave_beacon_signal / 16;
3397 int last_event = ifmgd->last_cqm_event_signal;
3398 int thold = bss_conf->cqm_rssi_thold;
3399 int hyst = bss_conf->cqm_rssi_hyst;
3400 if (sig < thold &&
3401 (last_event == 0 || sig < last_event - hyst)) {
3402 ifmgd->last_cqm_event_signal = sig;
3403 ieee80211_cqm_rssi_notify(
3404 &sdata->vif,
3405 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3406 GFP_KERNEL);
3407 } else if (sig > thold &&
3408 (last_event == 0 || sig > last_event + hyst)) {
3409 ifmgd->last_cqm_event_signal = sig;
3410 ieee80211_cqm_rssi_notify(
3411 &sdata->vif,
3412 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3413 GFP_KERNEL);
3414 }
3415 }
3416
392b9ffb 3417 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
bdcbd8e0 3418 mlme_dbg_ratelimited(sdata,
112c31f0 3419 "cancelling AP probe due to a received beacon\n");
392b9ffb 3420 ieee80211_reset_ap_probe(sdata);
92778180
JM		 3421 }
3422
b291ba11
JB		 3423 /*
3424 * Push the beacon loss detection into the future since
3425 * we are processing a beacon from the AP just now.
3426 */
d3a910a8 3427 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 3428
d91f36db
JB		 3429 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3430 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
b2e506bf 3431 len - baselen, false, &elems,
d91f36db
JB		 3432 care_about_ies, ncrc);
3433
25c9c875 3434 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
f87ad637
RR		 3435 bool directed_tim = ieee80211_check_tim(elems.tim,
3436 elems.tim_len,
3437 ifmgd->aid);
1fb3606b 3438 if (directed_tim) {
572e0012 3439 if (local->hw.conf.dynamic_ps_timeout > 0) {
70b12f26
RW		 3440 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3441 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3442 ieee80211_hw_config(local,
3443 IEEE80211_CONF_CHANGE_PS);
3444 }
572e0012 3445 ieee80211_send_nullfunc(local, sdata, 0);
6f0756a3 3446 } else if (!local->pspolling && sdata->u.mgd.powersave) {
572e0012
KV		 3447 local->pspolling = true;
3448
3449 /*
3450 * Here is assumed that the driver will be
3451 * able to send ps-poll frame and receive a
3452 * response even though power save mode is
3453 * enabled, but some drivers might require
3454 * to disable power save here. This needs
3455 * to be investigated.
3456 */
3457 ieee80211_send_pspoll(local, sdata);
3458 }
a97b77b9
VN		 3459 }
3460 }
7a5158ef 3461
488dd7b5 3462 if (sdata->vif.p2p) {
67baf663 3463 struct ieee80211_p2p_noa_attr noa = {};
488dd7b5
JB		 3464 int ret;
3465
3466 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3467 len - baselen,
3468 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
934457ee 3469 (u8 *) &noa, sizeof(noa));
67baf663
JD		 3470 if (ret >= 2) {
3471 if (sdata->u.mgd.p2p_noa_index != noa.index) {
3472 /* valid noa_attr and index changed */
3473 sdata->u.mgd.p2p_noa_index = noa.index;
3474 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3475 changed |= BSS_CHANGED_P2P_PS;
3476 /*
3477 * make sure we update all information, the CRC
3478 * mechanism doesn't look at P2P attributes.
3479 */
3480 ifmgd->beacon_crc_valid = false;
3481 }
3482 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3483 /* noa_attr not found and we had valid noa_attr before */
3484 sdata->u.mgd.p2p_noa_index = -1;
3485 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
488dd7b5 3486 changed |= BSS_CHANGED_P2P_PS;
488dd7b5
JB		 3487 ifmgd->beacon_crc_valid = false;
3488 }
3489 }
3490
0c21e632
LC		 3491 if (ifmgd->csa_waiting_bcn)
3492 ieee80211_chswitch_post_beacon(sdata);
3493
2ecc3905
AB		 3494 /*
3495 * Update beacon timing and dtim count on every beacon appearance. This
3496 * will allow the driver to use the most updated values. Do it before
3497 * comparing this one with last received beacon.
3498 * IMPORTANT: These parameters would possibly be out of sync by the time
3499 * the driver will use them. The synchronized view is currently
3500 * guaranteed only in certain callbacks.
3501 */
3502 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3503 sdata->vif.bss_conf.sync_tsf =
3504 le64_to_cpu(mgmt->u.beacon.timestamp);
3505 sdata->vif.bss_conf.sync_device_ts =
3506 rx_status->device_timestamp;
3507 if (elems.tim)
3508 sdata->vif.bss_conf.sync_dtim_count =
3509 elems.tim->dtim_count;
3510 else
3511 sdata->vif.bss_conf.sync_dtim_count = 0;
3512 }
3513
d8ec4433 3514 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
8d61ffa5 3515 return;
30196673 3516 ifmgd->beacon_crc = ncrc;
d8ec4433 3517 ifmgd->beacon_crc_valid = true;
30196673 3518
d45c4172 3519 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
7d25745d 3520
d70b7616 3521 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
2ba45384 3522 rx_status->device_timestamp,
d70b7616
JB		 3523 &elems, true);
3524
095d81ce
JB		 3525 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3526 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
7d25745d
JB		 3527 elems.wmm_param_len))
3528 changed |= BSS_CHANGED_QOS;
3529
c65dd147
EG		 3530 /*
3531 * If we haven't had a beacon before, tell the driver about the
ef429dad 3532 * DTIM period (and beacon timing if desired) now.
c65dd147 3533 */
989c6505 3534 if (!ifmgd->have_beacon) {
c65dd147
EG		 3535 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3536 if (elems.tim)
3537 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3538 else
3539 bss_conf->dtim_period = 1;
ef429dad 3540
989c6505
AB		 3541 changed |= BSS_CHANGED_BEACON_INFO;
3542 ifmgd->have_beacon = true;
482a9c74
AB		 3543
3544 mutex_lock(&local->iflist_mtx);
3545 ieee80211_recalc_ps(local, -1);
3546 mutex_unlock(&local->iflist_mtx);
3547
ce857888 3548 ieee80211_recalc_ps_vif(sdata);
c65dd147
EG		 3549 }
3550
1946bed9 3551 if (elems.erp_info) {
7a5158ef
JB		 3552 erp_valid = true;
3553 erp_value = elems.erp_info[0];
3554 } else {
3555 erp_valid = false;
50c4afb9 3556 }
7a5158ef
JB		 3557 changed |= ieee80211_handle_bss_capability(sdata,
3558 le16_to_cpu(mgmt->u.beacon.capab_info),
3559 erp_valid, erp_value);
f0706e82 3560
1128958d 3561 mutex_lock(&local->sta_mtx);
bee7f586
JB		 3562 sta = sta_info_get(sdata, bssid);
3563
53b954ee
EP		 3564 if (ieee80211_config_bw(sdata, sta,
3565 elems.ht_cap_elem, elems.ht_operation,
30eb1dc2
JB		 3566 elems.vht_operation, bssid, &changed)) {
3567 mutex_unlock(&local->sta_mtx);
3568 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3569 WLAN_REASON_DEAUTH_LEAVING,
3570 true, deauth_buf);
a90faa9d
EG		 3571 ieee80211_report_disconnect(sdata, deauth_buf,
3572 sizeof(deauth_buf), true,
3573 WLAN_REASON_DEAUTH_LEAVING);
8d61ffa5 3574 return;
30eb1dc2 3575 }
bee7f586
JB		 3576
3577 if (sta && elems.opmode_notif)
3578 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3579 rx_status->band, true);
1128958d 3580 mutex_unlock(&local->sta_mtx);
d3c990fb 3581
24a4e400
SG		 3582 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
3583 elems.country_elem,
3584 elems.country_elem_len,
c8d65917
SG		 3585 elems.pwr_constr_elem,
3586 elems.cisco_dtpc_elem);
3f2355cb 3587
471b3efd 3588 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 3589}
3590
1fa57d01
JB		 3591void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3592 struct sk_buff *skb)
f0706e82
JB		 3593{
3594 struct ieee80211_rx_status *rx_status;
f0706e82
JB		 3595 struct ieee80211_mgmt *mgmt;
3596 u16 fc;
1b3a2e49
JB		 3597 struct ieee802_11_elems elems;
3598 int ies_len;
f0706e82 3599
f0706e82
JB		 3600 rx_status = (struct ieee80211_rx_status *) skb->cb;
3601 mgmt = (struct ieee80211_mgmt *) skb->data;
3602 fc = le16_to_cpu(mgmt->frame_control);
3603
8d61ffa5 3604 sdata_lock(sdata);
77fdaa12 3605
66e67e41
JB		 3606 switch (fc & IEEE80211_FCTL_STYPE) {
3607 case IEEE80211_STYPE_BEACON:
8d61ffa5 3608 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
66e67e41
JB		 3609 break;
3610 case IEEE80211_STYPE_PROBE_RESP:
3611 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3612 break;
3613 case IEEE80211_STYPE_AUTH:
8d61ffa5 3614 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
66e67e41
JB		 3615 break;
3616 case IEEE80211_STYPE_DEAUTH:
8d61ffa5 3617 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
66e67e41
JB		 3618 break;
3619 case IEEE80211_STYPE_DISASSOC:
8d61ffa5 3620 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
66e67e41
JB		 3621 break;
3622 case IEEE80211_STYPE_ASSOC_RESP:
3623 case IEEE80211_STYPE_REASSOC_RESP:
8d61ffa5 3624 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
66e67e41
JB		 3625 break;
3626 case IEEE80211_STYPE_ACTION:
37799e52 3627 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
1b3a2e49
JB		 3628 ies_len = skb->len -
3629 offsetof(struct ieee80211_mgmt,
3630 u.action.u.chan_switch.variable);
37799e52
JB		 3631
3632 if (ies_len < 0)
3633 break;
3634
3635 ieee802_11_parse_elems(
3636 mgmt->u.action.u.chan_switch.variable,
b2e506bf 3637 ies_len, true, &elems);
37799e52
JB		 3638
3639 if (elems.parse_error)
3640 break;
3641
1b3a2e49 3642 ieee80211_sta_process_chanswitch(sdata,
2ba45384
LC		 3643 rx_status->mactime,
3644 rx_status->device_timestamp,
3645 &elems, false);
1b3a2e49
JB		 3646 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3647 ies_len = skb->len -
3648 offsetof(struct ieee80211_mgmt,
3649 u.action.u.ext_chan_switch.variable);
3650
3651 if (ies_len < 0)
3652 break;
3653
3654 ieee802_11_parse_elems(
3655 mgmt->u.action.u.ext_chan_switch.variable,
b2e506bf 3656 ies_len, true, &elems);
1b3a2e49
JB		 3657
3658 if (elems.parse_error)
3659 break;
3660
3661 /* for the handling code pretend this was also an IE */
3662 elems.ext_chansw_ie =
3663 &mgmt->u.action.u.ext_chan_switch.data;
3664
66e67e41 3665 ieee80211_sta_process_chanswitch(sdata,
2ba45384
LC		 3666 rx_status->mactime,
3667 rx_status->device_timestamp,
3668 &elems, false);
77fdaa12 3669 }
37799e52 3670 break;
77fdaa12 3671 }
8d61ffa5 3672 sdata_unlock(sdata);
f0706e82
JB		 3673}
3674
9c6bd790 3675static void ieee80211_sta_timer(unsigned long data)
f0706e82 3676{
60f8b39c
JB		 3677 struct ieee80211_sub_if_data *sdata =
3678 (struct ieee80211_sub_if_data *) data;
5bb644a0 3679
9b7d72c1 3680 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
f0706e82
JB		 3681}
3682
04ac3c0e 3683static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
6b684db1 3684 u8 *bssid, u8 reason, bool tx)
04ac3c0e 3685{
6ae16775 3686 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
04ac3c0e 3687
37ad3888 3688 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
6b684db1 3689 tx, frame_buf);
37ad3888 3690
a90faa9d
EG		 3691 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
3692 reason);
04ac3c0e
FF		 3693}
3694
66e67e41
JB		 3695static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
3696{
3697 struct ieee80211_local *local = sdata->local;
3698 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3699 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
1672c0e3 3700 u32 tx_flags = 0;
66e67e41 3701
8d61ffa5 3702 sdata_assert_lock(sdata);
66e67e41
JB		 3703
3704 if (WARN_ON_ONCE(!auth_data))
3705 return -EINVAL;
3706
66e67e41
JB		 3707 auth_data->tries++;
3708
3709 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
bdcbd8e0
JB		 3710 sdata_info(sdata, "authentication with %pM timed out\n",
3711 auth_data->bss->bssid);
66e67e41
JB		 3712
3713 /*
3714 * Most likely AP is not in the range so remove the
3715 * bss struct for that AP.
3716 */
3717 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3718
3719 return -ETIMEDOUT;
3720 }
3721
a1845fc7
JB		 3722 drv_mgd_prepare_tx(local, sdata);
3723
66e67e41 3724 if (auth_data->bss->proberesp_ies) {
6b8ece3a
JM		 3725 u16 trans = 1;
3726 u16 status = 0;
3727
bdcbd8e0
JB		 3728 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3729 auth_data->bss->bssid, auth_data->tries,
3730 IEEE80211_AUTH_MAX_TRIES);
66e67e41
JB		 3731
3732 auth_data->expected_transaction = 2;
6b8ece3a
JM		 3733
3734 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3735 trans = auth_data->sae_trans;
3736 status = auth_data->sae_status;
3737 auth_data->expected_transaction = trans;
3738 }
3739
6211dd12
SG		 3740 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3741 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3742 IEEE80211_TX_INTFL_MLME_CONN_TX;
3743
6b8ece3a
JM		 3744 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3745 auth_data->data, auth_data->data_len,
66e67e41 3746 auth_data->bss->bssid,
1672c0e3
JB		 3747 auth_data->bss->bssid, NULL, 0, 0,
3748 tx_flags);
66e67e41
JB		 3749 } else {
3750 const u8 *ssidie;
3751
bdcbd8e0
JB		 3752 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
3753 auth_data->bss->bssid, auth_data->tries,
3754 IEEE80211_AUTH_MAX_TRIES);
66e67e41 3755
9caf0364 3756 rcu_read_lock();
66e67e41 3757 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
9caf0364
JB		 3758 if (!ssidie) {
3759 rcu_read_unlock();
66e67e41 3760 return -EINVAL;
9caf0364 3761 }
66e67e41
JB		 3762 /*
3763 * Direct probe is sent to broadcast address as some APs
3764 * will not answer to direct packet in unassociated state.
3765 */
a344d677
JB		 3766 ieee80211_send_probe_req(sdata, sdata->vif.addr, NULL,
3767 ssidie + 2, ssidie[1],
6211dd12 3768 NULL, 0, (u32) -1, true, 0,
55de908a 3769 auth_data->bss->channel, false);
9caf0364 3770 rcu_read_unlock();
66e67e41
JB		 3771 }
3772
6211dd12 3773 if (tx_flags == 0) {
1672c0e3 3774 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
cb236d2d 3775 auth_data->timeout_started = true;
8d61ffa5 3776 run_again(sdata, auth_data->timeout);
89afe614 3777 } else {
cb236d2d
JB		 3778 auth_data->timeout =
3779 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3780 auth_data->timeout_started = true;
3781 run_again(sdata, auth_data->timeout);
1672c0e3 3782 }
66e67e41
JB		 3783
3784 return 0;
3785}
3786
3787static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3788{
3789 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3790 struct ieee80211_local *local = sdata->local;
3791
8d61ffa5 3792 sdata_assert_lock(sdata);
66e67e41 3793
66e67e41
JB		 3794 assoc_data->tries++;
3795 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
bdcbd8e0
JB		 3796 sdata_info(sdata, "association with %pM timed out\n",
3797 assoc_data->bss->bssid);
66e67e41
JB		 3798
3799 /*
3800 * Most likely AP is not in the range so remove the
3801 * bss struct for that AP.
3802 */
3803 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3804
3805 return -ETIMEDOUT;
3806 }
3807
bdcbd8e0
JB		 3808 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3809 assoc_data->bss->bssid, assoc_data->tries,
3810 IEEE80211_ASSOC_MAX_TRIES);
66e67e41
JB		 3811 ieee80211_send_assoc(sdata);
3812
1672c0e3
JB		 3813 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
3814 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
89afe614 3815 assoc_data->timeout_started = true;
8d61ffa5 3816 run_again(sdata, assoc_data->timeout);
89afe614 3817 } else {
cb236d2d
JB		 3818 assoc_data->timeout =
3819 round_jiffies_up(jiffies +
3820 IEEE80211_ASSOC_TIMEOUT_LONG);
3821 assoc_data->timeout_started = true;
3822 run_again(sdata, assoc_data->timeout);
1672c0e3 3823 }
66e67e41
JB		 3824
3825 return 0;
3826}
3827
1672c0e3
JB		 3828void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3829 __le16 fc, bool acked)
3830{
3831 struct ieee80211_local *local = sdata->local;
3832
3833 sdata->u.mgd.status_fc = fc;
3834 sdata->u.mgd.status_acked = acked;
3835 sdata->u.mgd.status_received = true;
3836
3837 ieee80211_queue_work(&local->hw, &sdata->work);
3838}
3839
1fa57d01 3840void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 3841{
9c6bd790 3842 struct ieee80211_local *local = sdata->local;
1fa57d01 3843 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 3844
8d61ffa5 3845 sdata_lock(sdata);
77fdaa12 3846
1672c0e3
JB		 3847 if (ifmgd->status_received) {
3848 __le16 fc = ifmgd->status_fc;
3849 bool status_acked = ifmgd->status_acked;
3850
3851 ifmgd->status_received = false;
3852 if (ifmgd->auth_data &&
3853 (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) {
3854 if (status_acked) {
3855 ifmgd->auth_data->timeout =
3856 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
8d61ffa5 3857 run_again(sdata, ifmgd->auth_data->timeout);
1672c0e3
JB		 3858 } else {
3859 ifmgd->auth_data->timeout = jiffies - 1;
3860 }
89afe614 3861 ifmgd->auth_data->timeout_started = true;
1672c0e3
JB		 3862 } else if (ifmgd->assoc_data &&
3863 (ieee80211_is_assoc_req(fc) ||
3864 ieee80211_is_reassoc_req(fc))) {
3865 if (status_acked) {
3866 ifmgd->assoc_data->timeout =
3867 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
8d61ffa5 3868 run_again(sdata, ifmgd->assoc_data->timeout);
1672c0e3
JB		 3869 } else {
3870 ifmgd->assoc_data->timeout = jiffies - 1;
3871 }
89afe614 3872 ifmgd->assoc_data->timeout_started = true;
1672c0e3
JB		 3873 }
3874 }
3875
89afe614 3876 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
66e67e41
JB		 3877 time_after(jiffies, ifmgd->auth_data->timeout)) {
3878 if (ifmgd->auth_data->done) {
3879 /*
3880 * ok ... we waited for assoc but userspace didn't,
3881 * so let's just kill the auth data
3882 */
3883 ieee80211_destroy_auth_data(sdata, false);
3884 } else if (ieee80211_probe_auth(sdata)) {
3885 u8 bssid[ETH_ALEN];
a9409093
EG		 3886 struct ieee80211_event event = {
3887 .type = MLME_EVENT,
3888 .u.mlme.data = AUTH_EVENT,
3889 .u.mlme.status = MLME_TIMEOUT,
3890 };
66e67e41
JB		 3891
3892 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3893
3894 ieee80211_destroy_auth_data(sdata, false);
3895
6ff57cf8 3896 cfg80211_auth_timeout(sdata->dev, bssid);
a9409093 3897 drv_event_callback(sdata->local, sdata, &event);
66e67e41 3898 }
89afe614 3899 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
8d61ffa5 3900 run_again(sdata, ifmgd->auth_data->timeout);
66e67e41 3901
89afe614 3902 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
66e67e41 3903 time_after(jiffies, ifmgd->assoc_data->timeout)) {
989c6505 3904 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
66e67e41 3905 ieee80211_do_assoc(sdata)) {
959867fa 3906 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
d0d1a12f
EG		 3907 struct ieee80211_event event = {
3908 .type = MLME_EVENT,
3909 .u.mlme.data = ASSOC_EVENT,
3910 .u.mlme.status = MLME_TIMEOUT,
3911 };
66e67e41
JB		 3912
3913 ieee80211_destroy_assoc_data(sdata, false);
959867fa 3914 cfg80211_assoc_timeout(sdata->dev, bss);
d0d1a12f 3915 drv_event_callback(sdata->local, sdata, &event);
66e67e41 3916 }
89afe614 3917 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
8d61ffa5 3918 run_again(sdata, ifmgd->assoc_data->timeout);
66e67e41 3919
392b9ffb 3920 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
b291ba11 3921 ifmgd->associated) {
a43abf29 3922 u8 bssid[ETH_ALEN];
72a8a3ed 3923 int max_tries;
a43abf29 3924
0c1ad2ca 3925 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 3926
72a8a3ed 3927 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
180205bd 3928 max_tries = max_nullfunc_tries;
72a8a3ed 3929 else
180205bd 3930 max_tries = max_probe_tries;
72a8a3ed 3931
4e5ff376
FF		 3932 /* ACK received for nullfunc probing frame */
3933 if (!ifmgd->probe_send_count)
3934 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 3935 else if (ifmgd->nullfunc_failed) {
3936 if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3937 mlme_dbg(sdata,
3938 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3939 bssid, ifmgd->probe_send_count,
3940 max_tries);
04ac3c0e
FF		 3941 ieee80211_mgd_probe_ap_send(sdata);
3942 } else {
bdcbd8e0
JB		 3943 mlme_dbg(sdata,
3944 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3945 bssid);
95acac61 3946 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1
JB		 3947 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3948 false);
04ac3c0e
FF		 3949 }
3950 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
8d61ffa5 3951 run_again(sdata, ifmgd->probe_timeout);
04ac3c0e 3952 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
bdcbd8e0
JB		 3953 mlme_dbg(sdata,
3954 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3955 bssid, probe_wait_ms);
95acac61 3956 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 3957 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
04ac3c0e 3958 } else if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3959 mlme_dbg(sdata,
3960 "No probe response from AP %pM after %dms, try %d/%i\n",
3961 bssid, probe_wait_ms,
3962 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 3963 ieee80211_mgd_probe_ap_send(sdata);
3964 } else {
b291ba11
JB		 3965 /*
3966 * We actually lost the connection ... or did we?
3967 * Let's make sure!
3968 */
b38afa87
BG		 3969 wiphy_debug(local->hw.wiphy,
3970 "%s: No probe response from AP %pM"
3971 " after %dms, disconnecting.\n",
3972 sdata->name,
180205bd 3973 bssid, probe_wait_ms);
04ac3c0e 3974
95acac61 3975 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 3976 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
b291ba11
JB		 3977 }
3978 }
3979
8d61ffa5 3980 sdata_unlock(sdata);
f0706e82
JB		 3981}
3982
b291ba11
JB		 3983static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3984{
3985 struct ieee80211_sub_if_data *sdata =
3986 (struct ieee80211_sub_if_data *) data;
0c21e632 3987 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 3988
0c21e632 3989 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
e5593f56
MK		 3990 return;
3991
682bd38b 3992 sdata->u.mgd.connection_loss = false;
1e4dcd01
JO		 3993 ieee80211_queue_work(&sdata->local->hw,
3994 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 3995}
3996
3997static void ieee80211_sta_conn_mon_timer(unsigned long data)
3998{
3999 struct ieee80211_sub_if_data *sdata =
4000 (struct ieee80211_sub_if_data *) data;
4001 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4002 struct ieee80211_local *local = sdata->local;
4003
0c21e632 4004 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
e5593f56
MK		 4005 return;
4006
42935eca 4007 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 4008}
4009
4010static void ieee80211_sta_monitor_work(struct work_struct *work)
4011{
4012 struct ieee80211_sub_if_data *sdata =
4013 container_of(work, struct ieee80211_sub_if_data,
4014 u.mgd.monitor_work);
4015
4016 ieee80211_mgd_probe_ap(sdata, false);
4017}
4018
9c6bd790
JB		 4019static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
4020{
494f1fe5
EP		 4021 u32 flags;
4022
ad935687 4023 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
925e64c3 4024 __ieee80211_stop_poll(sdata);
ad935687 4025
b291ba11 4026 /* let's probe the connection once */
494f1fe5
EP		 4027 flags = sdata->local->hw.flags;
4028 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
4029 ieee80211_queue_work(&sdata->local->hw,
4030 &sdata->u.mgd.monitor_work);
b291ba11 4031 /* and do all the other regular work too */
64592c8f 4032 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 4033 }
9c6bd790 4034}
f0706e82 4035
b8360ab8 4036#ifdef CONFIG_PM
1a1cb744
JB		 4037void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
4038{
4039 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4040 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4041
4042 sdata_lock(sdata);
4043
c52666ae
EG		 4044 if (ifmgd->auth_data || ifmgd->assoc_data) {
4045 const u8 *bssid = ifmgd->auth_data ?
4046 ifmgd->auth_data->bss->bssid :
4047 ifmgd->assoc_data->bss->bssid;
4048
1a1cb744 4049 /*
c52666ae
EG		 4050 * If we are trying to authenticate / associate while suspending,
4051 * cfg80211 won't know and won't actually abort those attempts,
4052 * thus we need to do that ourselves.
1a1cb744 4053 */
c52666ae 4054 ieee80211_send_deauth_disassoc(sdata, bssid,
1a1cb744
JB		 4055 IEEE80211_STYPE_DEAUTH,
4056 WLAN_REASON_DEAUTH_LEAVING,
4057 false, frame_buf);
c52666ae
EG		 4058 if (ifmgd->assoc_data)
4059 ieee80211_destroy_assoc_data(sdata, false);
4060 if (ifmgd->auth_data)
4061 ieee80211_destroy_auth_data(sdata, false);
1a1cb744
JB		 4062 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4063 IEEE80211_DEAUTH_FRAME_LEN);
4064 }
4065
be72afe0
JB		 4066 /* This is a bit of a hack - we should find a better and more generic
4067 * solution to this. Normally when suspending, cfg80211 will in fact
4068 * deauthenticate. However, it doesn't (and cannot) stop an ongoing
4069 * auth (not so important) or assoc (this is the problem) process.
4070 *
4071 * As a consequence, it can happen that we are in the process of both
4072 * associating and suspending, and receive an association response
4073 * after cfg80211 has checked if it needs to disconnect, but before
4074 * we actually set the flag to drop incoming frames. This will then
4075 * cause the workqueue flush to process the association response in
4076 * the suspend, resulting in a successful association just before it
4077 * tries to remove the interface from the driver, which now though
4078 * has a channel context assigned ... this results in issues.
4079 *
4080 * To work around this (for now) simply deauth here again if we're
4081 * now connected.
4082 */
4083 if (ifmgd->associated && !sdata->local->wowlan) {
4084 u8 bssid[ETH_ALEN];
4085 struct cfg80211_deauth_request req = {
4086 .reason_code = WLAN_REASON_DEAUTH_LEAVING,
4087 .bssid = bssid,
4088 };
4089
4090 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4091 ieee80211_mgd_deauth(sdata, &req);
4092 }
4093
1a1cb744
JB		 4094 sdata_unlock(sdata);
4095}
4096
b8360ab8
JB		 4097void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
4098{
4099 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4100
8d61ffa5 4101 sdata_lock(sdata);
b8360ab8 4102 if (!ifmgd->associated) {
8d61ffa5 4103 sdata_unlock(sdata);
b8360ab8
JB		 4104 return;
4105 }
4106
4107 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
4108 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
4109 mlme_dbg(sdata, "driver requested disconnect after resume\n");
4110 ieee80211_sta_connection_lost(sdata,
4111 ifmgd->associated->bssid,
4112 WLAN_REASON_UNSPECIFIED,
4113 true);
8d61ffa5 4114 sdata_unlock(sdata);
b8360ab8
JB		 4115 return;
4116 }
8d61ffa5 4117 sdata_unlock(sdata);
b8360ab8
JB		 4118}
4119#endif
4120
9c6bd790
JB		 4121/* interface setup */
4122void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 4123{
46900298 4124 struct ieee80211_if_managed *ifmgd;
988c0f72 4125
46900298 4126 ifmgd = &sdata->u.mgd;
b291ba11 4127 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 4128 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 4129 INIT_WORK(&ifmgd->beacon_connection_loss_work,
4130 ieee80211_beacon_connection_loss_work);
882a7c69
JB		 4131 INIT_WORK(&ifmgd->csa_connection_drop_work,
4132 ieee80211_csa_connection_drop_work);
687da132 4133 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
81dd2b88
AN		 4134 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
4135 ieee80211_tdls_peer_del_work);
46900298 4136 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 4137 (unsigned long) sdata);
b291ba11
JB		 4138 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
4139 (unsigned long) sdata);
4140 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
4141 (unsigned long) sdata);
46900298 4142 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 4143 (unsigned long) sdata);
02219b3a
JB		 4144 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
4145 ieee80211_sta_handle_tspec_ac_params_wk);
9c6bd790 4146
ab1faead 4147 ifmgd->flags = 0;
1478acb3 4148 ifmgd->powersave = sdata->wdev.ps;
219c3867
AB		 4149 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
4150 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
67baf663 4151 ifmgd->p2p_noa_index = -1;
bbbdff9e 4152
0d8614b4 4153 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
0f78231b
JB		 4154 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
4155 else
4156 ifmgd->req_smps = IEEE80211_SMPS_OFF;
1277b4a9
LK		 4157
4158 /* Setup TDLS data */
4159 spin_lock_init(&ifmgd->teardown_lock);
4160 ifmgd->teardown_skb = NULL;
4161 ifmgd->orig_teardown_skb = NULL;
f0706e82
JB		 4162}
4163
77fdaa12
JB		 4164/* scan finished notification */
4165void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 4166{
31ee67a1 4167 struct ieee80211_sub_if_data *sdata;
60f8b39c 4168
77fdaa12
JB		 4169 /* Restart STA timers */
4170 rcu_read_lock();
370bd005
BG		 4171 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4172 if (ieee80211_sdata_running(sdata))
4173 ieee80211_restart_sta_timer(sdata);
4174 }
77fdaa12
JB		 4175 rcu_read_unlock();
4176}
60f8b39c 4177
77fdaa12
JB		 4178int ieee80211_max_network_latency(struct notifier_block *nb,
4179 unsigned long data, void *dummy)
4180{
4181 s32 latency_usec = (s32) data;
4182 struct ieee80211_local *local =
4183 container_of(nb, struct ieee80211_local,
4184 network_latency_notifier);
1fa6f4af 4185
77fdaa12
JB		 4186 mutex_lock(&local->iflist_mtx);
4187 ieee80211_recalc_ps(local, latency_usec);
4188 mutex_unlock(&local->iflist_mtx);
dfe67012 4189
8bd811aa 4190 return NOTIFY_OK;
9c6bd790
JB		 4191}
4192
f2d9d270
JB		 4193static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
4194 struct cfg80211_bss *cbss)
4195{
4196 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4197 const u8 *ht_cap_ie, *vht_cap_ie;
4198 const struct ieee80211_ht_cap *ht_cap;
4199 const struct ieee80211_vht_cap *vht_cap;
4200 u8 chains = 1;
4201
4202 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
4203 return chains;
4204
9caf0364 4205 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
f2d9d270
JB		 4206 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
4207 ht_cap = (void *)(ht_cap_ie + 2);
4208 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4209 /*
4210 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4211 * "Tx Unequal Modulation Supported" fields.
4212 */
4213 }
4214
4215 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
4216 return chains;
4217
9caf0364 4218 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
f2d9d270
JB		 4219 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
4220 u8 nss;
4221 u16 tx_mcs_map;
4222
4223 vht_cap = (void *)(vht_cap_ie + 2);
4224 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4225 for (nss = 8; nss > 0; nss--) {
4226 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4227 IEEE80211_VHT_MCS_NOT_SUPPORTED)
4228 break;
4229 }
4230 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4231 chains = max(chains, nss);
4232 }
4233
4234 return chains;
4235}
4236
b17166a7
JB		 4237static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4238 struct cfg80211_bss *cbss)
a1cf775d
JB		 4239{
4240 struct ieee80211_local *local = sdata->local;
4241 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
53b954ee 4242 const struct ieee80211_ht_cap *ht_cap = NULL;
24398e39 4243 const struct ieee80211_ht_operation *ht_oper = NULL;
f2d9d270 4244 const struct ieee80211_vht_operation *vht_oper = NULL;
24398e39 4245 struct ieee80211_supported_band *sband;
4bf88530 4246 struct cfg80211_chan_def chandef;
f2d9d270 4247 int ret;
a1cf775d 4248
24398e39
JB		 4249 sband = local->hw.wiphy->bands[cbss->channel->band];
4250
f2d9d270
JB		 4251 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
4252 IEEE80211_STA_DISABLE_80P80MHZ |
4253 IEEE80211_STA_DISABLE_160MHZ);
4254
9caf0364
JB		 4255 rcu_read_lock();
4256
f2d9d270
JB		 4257 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
4258 sband->ht_cap.ht_supported) {
53b954ee 4259 const u8 *ht_oper_ie, *ht_cap_ie;
24398e39 4260
9caf0364 4261 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
24398e39
JB		 4262 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
4263 ht_oper = (void *)(ht_oper_ie + 2);
08e6effa 4264
53b954ee
EP		 4265 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4266 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
4267 ht_cap = (void *)(ht_cap_ie + 2);
4268
4269 if (!ht_cap) {
08e6effa
JB		 4270 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4271 ht_oper = NULL;
4272 }
24398e39
JB		 4273 }
4274
f2d9d270
JB		 4275 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4276 sband->vht_cap.vht_supported) {
08e6effa 4277 const u8 *vht_oper_ie, *vht_cap;
f2d9d270 4278
9caf0364
JB		 4279 vht_oper_ie = ieee80211_bss_get_ie(cbss,
4280 WLAN_EID_VHT_OPERATION);
f2d9d270
JB		 4281 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
4282 vht_oper = (void *)(vht_oper_ie + 2);
4283 if (vht_oper && !ht_oper) {
4284 vht_oper = NULL;
bdcbd8e0 4285 sdata_info(sdata,
f2d9d270 4286 "AP advertised VHT without HT, disabling both\n");
cb145022
JB		 4287 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4288 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
24398e39 4289 }
08e6effa
JB		 4290
4291 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4292 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
4293 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4294 vht_oper = NULL;
4295 }
24398e39
JB		 4296 }
4297
f2d9d270
JB		 4298 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
4299 cbss->channel,
53b954ee 4300 ht_cap, ht_oper, vht_oper,
5cdaed1e 4301 &chandef, false);
04ecd257 4302
f2d9d270
JB		 4303 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
4304 local->rx_chains);
24398e39 4305
9caf0364
JB		 4306 rcu_read_unlock();
4307
04ecd257
JB		 4308 /* will change later if needed */
4309 sdata->smps_mode = IEEE80211_SMPS_OFF;
4310
34a3740d 4311 mutex_lock(&local->mtx);
f2d9d270
JB		 4312 /*
4313 * If this fails (possibly due to channel context sharing
4314 * on incompatible channels, e.g. 80+80 and 160 sharing the
4315 * same control channel) try to use a smaller bandwidth.
4316 */
4317 ret = ieee80211_vif_use_channel(sdata, &chandef,
4318 IEEE80211_CHANCTX_SHARED);
0418a445
SW		 4319
4320 /* don't downgrade for 5 and 10 MHz channels, though. */
4321 if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4322 chandef.width == NL80211_CHAN_WIDTH_10)
34a3740d 4323 goto out;
0418a445 4324
d601cd8d 4325 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
e6b7cde4 4326 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
d601cd8d
JB		 4327 ret = ieee80211_vif_use_channel(sdata, &chandef,
4328 IEEE80211_CHANCTX_SHARED);
4329 }
34a3740d
JB		 4330 out:
4331 mutex_unlock(&local->mtx);
f2d9d270 4332 return ret;
b17166a7
JB		 4333}
4334
4335static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
c1041f10
CRI		 4336 struct cfg80211_bss *cbss, bool assoc,
4337 bool override)
b17166a7
JB		 4338{
4339 struct ieee80211_local *local = sdata->local;
4340 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4341 struct ieee80211_bss *bss = (void *)cbss->priv;
4342 struct sta_info *new_sta = NULL;
179b8fc7 4343 struct ieee80211_supported_band *sband;
c1041f10 4344 bool have_sta = false;
b17166a7
JB		 4345 int err;
4346
179b8fc7
CRI		 4347 sband = local->hw.wiphy->bands[cbss->channel->band];
4348
b17166a7
JB		 4349 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
4350 return -EINVAL;
4351
4352 if (assoc) {
4353 rcu_read_lock();
4354 have_sta = sta_info_get(sdata, cbss->bssid);
4355 rcu_read_unlock();
4356 }
4357
4358 if (!have_sta) {
4359 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4360 if (!new_sta)
4361 return -ENOMEM;
4362 }
179b8fc7 4363
c1041f10 4364 if (new_sta || override) {
179b8fc7
CRI		 4365 err = ieee80211_prep_channel(sdata, cbss);
4366 if (err) {
4367 if (new_sta)
4368 sta_info_free(local, new_sta);
4369 return -EINVAL;
4370 }
4371 }
4372
13e0c8e3 4373 if (new_sta) {
5d6a1b06
JB		 4374 u32 rates = 0, basic_rates = 0;
4375 bool have_higher_than_11mbit;
4376 int min_rate = INT_MAX, min_rate_index = -1;
2103dec1 4377 struct ieee80211_chanctx_conf *chanctx_conf;
8cef2c9d 4378 const struct cfg80211_bss_ies *ies;
179b8fc7 4379 int shift = ieee80211_vif_get_shift(&sdata->vif);
2103dec1 4380 u32 rate_flags;
b17166a7 4381
2103dec1
SW		 4382 rcu_read_lock();
4383 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4384 if (WARN_ON(!chanctx_conf)) {
4385 rcu_read_unlock();
c368ddaa 4386 sta_info_free(local, new_sta);
2103dec1
SW		 4387 return -EINVAL;
4388 }
4389 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
4390 rcu_read_unlock();
5d6a1b06 4391
5d6a1b06
JB		 4392 ieee80211_get_rates(sband, bss->supp_rates,
4393 bss->supp_rates_len,
4394 &rates, &basic_rates,
4395 &have_higher_than_11mbit,
2103dec1
SW		 4396 &min_rate, &min_rate_index,
4397 shift, rate_flags);
5d6a1b06
JB		 4398
4399 /*
4400 * This used to be a workaround for basic rates missing
4401 * in the association response frame. Now that we no
4402 * longer use the basic rates from there, it probably
4403 * doesn't happen any more, but keep the workaround so
4404 * in case some *other* APs are buggy in different ways
4405 * we can connect -- with a warning.
4406 */
4407 if (!basic_rates && min_rate_index >= 0) {
bdcbd8e0
JB		 4408 sdata_info(sdata,
4409 "No basic rates, using min rate instead\n");
5d6a1b06
JB		 4410 basic_rates = BIT(min_rate_index);
4411 }
4412
13e0c8e3 4413 new_sta->sta.supp_rates[cbss->channel->band] = rates;
5d6a1b06
JB		 4414 sdata->vif.bss_conf.basic_rates = basic_rates;
4415
4416 /* cf. IEEE 802.11 9.2.12 */
55de908a 4417 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
5d6a1b06
JB		 4418 have_higher_than_11mbit)
4419 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
4420 else
4421 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
4422
4423 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
4424
8c358bcd
JB		 4425 /* set timing information */
4426 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
8cef2c9d 4427 rcu_read_lock();
ef429dad
JB		 4428 ies = rcu_dereference(cbss->beacon_ies);
4429 if (ies) {
4430 const u8 *tim_ie;
4431
4432 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4433 sdata->vif.bss_conf.sync_device_ts =
4434 bss->device_ts_beacon;
4435 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4436 ies->data, ies->len);
4437 if (tim_ie && tim_ie[1] >= 2)
4438 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
4439 else
4440 sdata->vif.bss_conf.sync_dtim_count = 0;
4441 } else if (!(local->hw.flags &
4442 IEEE80211_HW_TIMING_BEACON_ONLY)) {
4443 ies = rcu_dereference(cbss->proberesp_ies);
4444 /* must be non-NULL since beacon IEs were NULL */
4445 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4446 sdata->vif.bss_conf.sync_device_ts =
4447 bss->device_ts_presp;
4448 sdata->vif.bss_conf.sync_dtim_count = 0;
4449 } else {
4450 sdata->vif.bss_conf.sync_tsf = 0;
4451 sdata->vif.bss_conf.sync_device_ts = 0;
4452 sdata->vif.bss_conf.sync_dtim_count = 0;
4453 }
8cef2c9d 4454 rcu_read_unlock();
8c358bcd
JB		 4455
4456 /* tell driver about BSSID, basic rates and timing */
5d6a1b06 4457 ieee80211_bss_info_change_notify(sdata,
8c358bcd
JB		 4458 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4459 BSS_CHANGED_BEACON_INT);
a1cf775d
JB		 4460
4461 if (assoc)
13e0c8e3 4462 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
a1cf775d 4463
13e0c8e3
JB		 4464 err = sta_info_insert(new_sta);
4465 new_sta = NULL;
a1cf775d 4466 if (err) {
bdcbd8e0
JB		 4467 sdata_info(sdata,
4468 "failed to insert STA entry for the AP (error %d)\n",
4469 err);
a1cf775d
JB		 4470 return err;
4471 }
4472 } else
b203ca39 4473 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
a1cf775d 4474
7d830a19
DS		 4475 /* Cancel scan to ensure that nothing interferes with connection */
4476 if (local->scanning)
4477 ieee80211_scan_cancel(local);
4478
a1cf775d
JB		 4479 return 0;
4480}
4481
77fdaa12
JB		 4482/* config hooks */
4483int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4484 struct cfg80211_auth_request *req)
9c6bd790 4485{
66e67e41
JB		 4486 struct ieee80211_local *local = sdata->local;
4487 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4488 struct ieee80211_mgd_auth_data *auth_data;
77fdaa12 4489 u16 auth_alg;
66e67e41
JB		 4490 int err;
4491
4492 /* prepare auth data structure */
9c6bd790 4493
77fdaa12
JB		 4494 switch (req->auth_type) {
4495 case NL80211_AUTHTYPE_OPEN_SYSTEM:
4496 auth_alg = WLAN_AUTH_OPEN;
4497 break;
4498 case NL80211_AUTHTYPE_SHARED_KEY:
66e67e41 4499 if (IS_ERR(local->wep_tx_tfm))
9dca9c49 4500 return -EOPNOTSUPP;
77fdaa12
JB		 4501 auth_alg = WLAN_AUTH_SHARED_KEY;
4502 break;
4503 case NL80211_AUTHTYPE_FT:
4504 auth_alg = WLAN_AUTH_FT;
4505 break;
4506 case NL80211_AUTHTYPE_NETWORK_EAP:
4507 auth_alg = WLAN_AUTH_LEAP;
4508 break;
6b8ece3a
JM		 4509 case NL80211_AUTHTYPE_SAE:
4510 auth_alg = WLAN_AUTH_SAE;
4511 break;
77fdaa12
JB		 4512 default:
4513 return -EOPNOTSUPP;
60f8b39c 4514 }
77fdaa12 4515
6b8ece3a
JM		 4516 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
4517 req->ie_len, GFP_KERNEL);
66e67e41 4518 if (!auth_data)
9c6bd790 4519 return -ENOMEM;
77fdaa12 4520
66e67e41 4521 auth_data->bss = req->bss;
77fdaa12 4522
6b8ece3a
JM		 4523 if (req->sae_data_len >= 4) {
4524 __le16 *pos = (__le16 *) req->sae_data;
4525 auth_data->sae_trans = le16_to_cpu(pos[0]);
4526 auth_data->sae_status = le16_to_cpu(pos[1]);
4527 memcpy(auth_data->data, req->sae_data + 4,
4528 req->sae_data_len - 4);
4529 auth_data->data_len += req->sae_data_len - 4;
4530 }
4531
77fdaa12 4532 if (req->ie && req->ie_len) {
6b8ece3a
JM		 4533 memcpy(&auth_data->data[auth_data->data_len],
4534 req->ie, req->ie_len);
4535 auth_data->data_len += req->ie_len;
9c6bd790 4536 }
77fdaa12 4537
fffd0934 4538 if (req->key && req->key_len) {
66e67e41
JB		 4539 auth_data->key_len = req->key_len;
4540 auth_data->key_idx = req->key_idx;
4541 memcpy(auth_data->key, req->key, req->key_len);
fffd0934
JB		 4542 }
4543
66e67e41 4544 auth_data->algorithm = auth_alg;
60f8b39c 4545
66e67e41 4546 /* try to authenticate/probe */
2a33bee2 4547
66e67e41
JB		 4548 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4549 ifmgd->assoc_data) {
4550 err = -EBUSY;
4551 goto err_free;
2a33bee2
GE		 4552 }
4553
66e67e41
JB		 4554 if (ifmgd->auth_data)
4555 ieee80211_destroy_auth_data(sdata, false);
2a33bee2 4556
66e67e41
JB		 4557 /* prep auth_data so we don't go into idle on disassoc */
4558 ifmgd->auth_data = auth_data;
af6b6374 4559
7b119dc0
JB		 4560 if (ifmgd->associated) {
4561 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4562
4563 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4564 WLAN_REASON_UNSPECIFIED,
4565 false, frame_buf);
4566
a90faa9d
EG		 4567 ieee80211_report_disconnect(sdata, frame_buf,
4568 sizeof(frame_buf), true,
4569 WLAN_REASON_UNSPECIFIED);
7b119dc0 4570 }
af6b6374 4571
bdcbd8e0 4572 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
e5b900d2 4573
c1041f10 4574 err = ieee80211_prep_connection(sdata, req->bss, false, false);
a1cf775d 4575 if (err)
66e67e41 4576 goto err_clear;
af6b6374 4577
66e67e41
JB		 4578 err = ieee80211_probe_auth(sdata);
4579 if (err) {
66e67e41
JB		 4580 sta_info_destroy_addr(sdata, req->bss->bssid);
4581 goto err_clear;
4582 }
4583
4584 /* hold our own reference */
5b112d3d 4585 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
8d61ffa5 4586 return 0;
66e67e41
JB		 4587
4588 err_clear:
c84a67a2 4589 eth_zero_addr(ifmgd->bssid);
3d2abdfd 4590 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 4591 ifmgd->auth_data = NULL;
4592 err_free:
4593 kfree(auth_data);
66e67e41 4594 return err;
af6b6374
JB		 4595}
4596
095d81ce
JB		 4597static bool ieee80211_usable_wmm_params(struct ieee80211_sub_if_data *sdata,
4598 const u8 *wmm_param, int len)
4599{
4600 const u8 *pos;
4601 size_t left;
4602
4603 if (len < 8)
4604 return false;
4605
4606 if (wmm_param[5] != 1 /* version */)
4607 return false;
4608
4609 pos = wmm_param + 8;
4610 left = len - 8;
4611
4612 for (; left >= 4; left -= 4, pos += 4) {
4613 u8 aifsn = pos[0] & 0x0f;
4614 u8 ecwmin = pos[1] & 0x0f;
4615 u8 ecwmax = (pos[1] & 0xf0) >> 4;
4616 int aci = (pos[0] >> 5) & 0x03;
4617
4618 if (aifsn < 2) {
4619 sdata_info(sdata,
4620 "AP has invalid WMM params (AIFSN=%d for ACI %d), disabling WMM\n",
4621 aifsn, aci);
4622 return false;
4623 }
4624 if (ecwmin > ecwmax) {
4625 sdata_info(sdata,
4626 "AP has invalid WMM params (ECWmin/max=%d/%d for ACI %d), disabling WMM\n",
4627 ecwmin, ecwmax, aci);
4628 return false;
4629 }
4630 }
4631
4632 return true;
4633}
4634
77fdaa12
JB		 4635int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4636 struct cfg80211_assoc_request *req)
f0706e82 4637{
66e67e41 4638 struct ieee80211_local *local = sdata->local;
77fdaa12 4639 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 4640 struct ieee80211_bss *bss = (void *)req->bss->priv;
66e67e41 4641 struct ieee80211_mgd_assoc_data *assoc_data;
c65dd147 4642 const struct cfg80211_bss_ies *beacon_ies;
4e74bfdb 4643 struct ieee80211_supported_band *sband;
b08fbbd8 4644 const u8 *ssidie, *ht_ie, *vht_ie;
2a33bee2 4645 int i, err;
c1041f10 4646 bool override = false;
f0706e82 4647
66e67e41
JB		 4648 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4649 if (!assoc_data)
4650 return -ENOMEM;
4651
9caf0364
JB		 4652 rcu_read_lock();
4653 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4654 if (!ssidie) {
4655 rcu_read_unlock();
4656 kfree(assoc_data);
4657 return -EINVAL;
4658 }
4659 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4660 assoc_data->ssid_len = ssidie[1];
4661 rcu_read_unlock();
4662
7b119dc0
JB		 4663 if (ifmgd->associated) {
4664 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4665
4666 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4667 WLAN_REASON_UNSPECIFIED,
4668 false, frame_buf);
4669
a90faa9d
EG		 4670 ieee80211_report_disconnect(sdata, frame_buf,
4671 sizeof(frame_buf), true,
4672 WLAN_REASON_UNSPECIFIED);
7b119dc0 4673 }
66e67e41
JB		 4674
4675 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4676 err = -EBUSY;
4677 goto err_free;
af6b6374 4678 }
77fdaa12 4679
66e67e41
JB		 4680 if (ifmgd->assoc_data) {
4681 err = -EBUSY;
4682 goto err_free;
4683 }
77fdaa12 4684
66e67e41
JB		 4685 if (ifmgd->auth_data) {
4686 bool match;
4687
4688 /* keep sta info, bssid if matching */
b203ca39 4689 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
66e67e41 4690 ieee80211_destroy_auth_data(sdata, match);
2a33bee2
GE		 4691 }
4692
66e67e41 4693 /* prepare assoc data */
095d81ce 4694
d8ec4433
JO		 4695 ifmgd->beacon_crc_valid = false;
4696
095d81ce
JB		 4697 assoc_data->wmm = bss->wmm_used &&
4698 (local->hw.queues >= IEEE80211_NUM_ACS);
4699 if (assoc_data->wmm) {
4700 /* try to check validity of WMM params IE */
4701 const struct cfg80211_bss_ies *ies;
4702 const u8 *wp, *start, *end;
4703
4704 rcu_read_lock();
4705 ies = rcu_dereference(req->bss->ies);
4706 start = ies->data;
4707 end = start + ies->len;
4708
4709 while (true) {
4710 wp = cfg80211_find_vendor_ie(
4711 WLAN_OUI_MICROSOFT,
4712 WLAN_OUI_TYPE_MICROSOFT_WMM,
4713 start, end - start);
4714 if (!wp)
4715 break;
4716 start = wp + wp[1] + 2;
4717 /* if this IE is too short, try the next */
4718 if (wp[1] <= 4)
4719 continue;
4720 /* if this IE is WMM params, we found what we wanted */
4721 if (wp[6] == 1)
4722 break;
4723 }
4724
4725 if (!wp || !ieee80211_usable_wmm_params(sdata, wp + 2,
4726 wp[1] - 2)) {
4727 assoc_data->wmm = false;
4728 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
4729 }
4730 rcu_read_unlock();
4731 }
4732
de5036aa
JB		 4733 /*
4734 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4735 * We still associate in non-HT mode (11a/b/g) if any one of these
4736 * ciphers is configured as pairwise.
4737 * We can set this to true for non-11n hardware, that'll be checked
4738 * separately along with the peer capabilities.
4739 */
1c4cb928 4740 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
77fdaa12
JB		 4741 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4742 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
1c4cb928 4743 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
a8243b72 4744 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
d545daba 4745 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
1c4cb928 4746 netdev_info(sdata->dev,
d545daba 4747 "disabling HT/VHT due to WEP/TKIP use\n");
1c4cb928
JB		 4748 }
4749 }
77fdaa12 4750
4e74bfdb
JB		 4751 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4752 sband = local->hw.wiphy->bands[req->bss->channel->band];
4753 if (!sband->ht_cap.ht_supported ||
095d81ce
JB		 4754 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4755 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
a8243b72 4756 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
095d81ce
JB		 4757 if (!bss->wmm_used &&
4758 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
1b49de26
JB		 4759 netdev_info(sdata->dev,
4760 "disabling HT as WMM/QoS is not supported by the AP\n");
1c4cb928 4761 }
4e74bfdb 4762
d545daba
MP		 4763 /* disable VHT if we don't support it or the AP doesn't use WMM */
4764 if (!sband->vht_cap.vht_supported ||
095d81ce
JB		 4765 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4766 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
d545daba 4767 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
095d81ce
JB		 4768 if (!bss->wmm_used &&
4769 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
1b49de26
JB		 4770 netdev_info(sdata->dev,
4771 "disabling VHT as WMM/QoS is not supported by the AP\n");
d545daba
MP		 4772 }
4773
ef96a842
BG		 4774 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4775 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4776 sizeof(ifmgd->ht_capa_mask));
4777
dd5ecfea
JB		 4778 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4779 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4780 sizeof(ifmgd->vht_capa_mask));
4781
77fdaa12 4782 if (req->ie && req->ie_len) {
66e67e41
JB		 4783 memcpy(assoc_data->ie, req->ie, req->ie_len);
4784 assoc_data->ie_len = req->ie_len;
4785 }
f679f65d 4786
66e67e41 4787 assoc_data->bss = req->bss;
f679f65d 4788
af6b6374
JB		 4789 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4790 if (ifmgd->powersave)
04ecd257 4791 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
af6b6374 4792 else
04ecd257 4793 sdata->smps_mode = IEEE80211_SMPS_OFF;
af6b6374 4794 } else
04ecd257 4795 sdata->smps_mode = ifmgd->req_smps;
af6b6374 4796
66e67e41 4797 assoc_data->capability = req->bss->capability;
66e67e41
JB		 4798 assoc_data->supp_rates = bss->supp_rates;
4799 assoc_data->supp_rates_len = bss->supp_rates_len;
9dde6423 4800
9caf0364 4801 rcu_read_lock();
9dde6423
JB		 4802 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4803 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4804 assoc_data->ap_ht_param =
4805 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4806 else
a8243b72 4807 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
b08fbbd8
JB		 4808 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4809 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4810 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4811 sizeof(struct ieee80211_vht_cap));
4812 else
4813 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
9caf0364 4814 rcu_read_unlock();
63f170e0 4815
848955cc
JB		 4816 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
4817 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK),
4818 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
4819 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
4820
ab13315a 4821 if (bss->wmm_used && bss->uapsd_supported &&
848955cc 4822 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
76f0303d 4823 assoc_data->uapsd = true;
ab13315a
KV		 4824 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4825 } else {
76f0303d 4826 assoc_data->uapsd = false;
ab13315a
KV		 4827 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4828 }
4829
77fdaa12 4830 if (req->prev_bssid)
66e67e41 4831 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12
JB		 4832
4833 if (req->use_mfp) {
4834 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4835 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4836 } else {
4837 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4838 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4839 }
4840
cd2f5dd7
AK		 4841 if (req->flags & ASSOC_REQ_USE_RRM)
4842 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
4843 else
4844 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
4845
77fdaa12
JB		 4846 if (req->crypto.control_port)
4847 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4848 else
4849 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4850
a621fa4d
JB		 4851 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4852 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
2475b1cc
MS		 4853 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
4854 sdata->vif.type);
a621fa4d 4855
66e67e41
JB		 4856 /* kick off associate process */
4857
4858 ifmgd->assoc_data = assoc_data;
826262c3 4859 ifmgd->dtim_period = 0;
989c6505 4860 ifmgd->have_beacon = false;
66e67e41 4861
c1041f10
CRI		 4862 /* override HT/VHT configuration only if the AP and we support it */
4863 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
4864 struct ieee80211_sta_ht_cap sta_ht_cap;
4865
4866 if (req->flags & ASSOC_REQ_DISABLE_HT)
4867 override = true;
4868
4869 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
4870 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
4871
4872 /* check for 40 MHz disable override */
4873 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) &&
4874 sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
4875 !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
4876 override = true;
4877
4878 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4879 req->flags & ASSOC_REQ_DISABLE_VHT)
4880 override = true;
4881 }
4882
4883 if (req->flags & ASSOC_REQ_DISABLE_HT) {
4884 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4885 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4886 }
4887
4888 if (req->flags & ASSOC_REQ_DISABLE_VHT)
4889 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4890
4891 err = ieee80211_prep_connection(sdata, req->bss, true, override);
a1cf775d
JB		 4892 if (err)
4893 goto err_clear;
66e67e41 4894
c65dd147
EG		 4895 rcu_read_lock();
4896 beacon_ies = rcu_dereference(req->bss->beacon_ies);
826262c3 4897
c65dd147
EG		 4898 if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC &&
4899 !beacon_ies) {
4900 /*
4901 * Wait up to one beacon interval ...
4902 * should this be more if we miss one?
4903 */
4904 sdata_info(sdata, "waiting for beacon from %pM\n",
4905 ifmgd->bssid);
4906 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
89afe614 4907 assoc_data->timeout_started = true;
c65dd147
EG		 4908 assoc_data->need_beacon = true;
4909 } else if (beacon_ies) {
4910 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4911 beacon_ies->data,
4912 beacon_ies->len);
ef429dad
JB		 4913 u8 dtim_count = 0;
4914
c65dd147
EG		 4915 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4916 const struct ieee80211_tim_ie *tim;
4917 tim = (void *)(tim_ie + 2);
4918 ifmgd->dtim_period = tim->dtim_period;
ef429dad 4919 dtim_count = tim->dtim_count;
826262c3 4920 }
989c6505 4921 ifmgd->have_beacon = true;
66e67e41 4922 assoc_data->timeout = jiffies;
89afe614 4923 assoc_data->timeout_started = true;
ef429dad
JB		 4924
4925 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
4926 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4927 sdata->vif.bss_conf.sync_device_ts =
4928 bss->device_ts_beacon;
4929 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4930 }
c65dd147
EG		 4931 } else {
4932 assoc_data->timeout = jiffies;
89afe614 4933 assoc_data->timeout_started = true;
66e67e41 4934 }
c65dd147
EG		 4935 rcu_read_unlock();
4936
8d61ffa5 4937 run_again(sdata, assoc_data->timeout);
66e67e41 4938
fcff4f10
PS		 4939 if (bss->corrupt_data) {
4940 char *corrupt_type = "data";
4941 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4942 if (bss->corrupt_data &
4943 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4944 corrupt_type = "beacon and probe response";
4945 else
4946 corrupt_type = "beacon";
4947 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4948 corrupt_type = "probe response";
bdcbd8e0
JB		 4949 sdata_info(sdata, "associating with AP with corrupt %s\n",
4950 corrupt_type);
fcff4f10
PS		 4951 }
4952
8d61ffa5 4953 return 0;
66e67e41 4954 err_clear:
c84a67a2 4955 eth_zero_addr(ifmgd->bssid);
3d2abdfd 4956 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 4957 ifmgd->assoc_data = NULL;
4958 err_free:
4959 kfree(assoc_data);
66e67e41 4960 return err;
f0706e82
JB		 4961}
4962
77fdaa12 4963int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
63c9c5e7 4964 struct cfg80211_deauth_request *req)
f0706e82 4965{
46900298 4966 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 4967 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
6863255b 4968 bool tx = !req->local_state_change;
f0706e82 4969
c9c3a060
JB		 4970 if (ifmgd->auth_data &&
4971 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
4972 sdata_info(sdata,
4973 "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
4974 req->bssid, req->reason_code,
4975 ieee80211_get_reason_code_string(req->reason_code));
0ff71613 4976
8c7d857c 4977 drv_mgd_prepare_tx(sdata->local, sdata);
37ad3888
JB		 4978 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4979 IEEE80211_STYPE_DEAUTH,
6863255b 4980 req->reason_code, tx,
37ad3888 4981 frame_buf);
86552017 4982 ieee80211_destroy_auth_data(sdata, false);
a90faa9d
EG		 4983 ieee80211_report_disconnect(sdata, frame_buf,
4984 sizeof(frame_buf), true,
4985 req->reason_code);
86552017 4986
c9c3a060 4987 return 0;
8c7d857c
EG		 4988 }
4989
86552017
JB		 4990 if (ifmgd->associated &&
4991 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
c9c3a060
JB		 4992 sdata_info(sdata,
4993 "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
4994 req->bssid, req->reason_code,
4995 ieee80211_get_reason_code_string(req->reason_code));
4996
86552017
JB		 4997 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4998 req->reason_code, tx, frame_buf);
a90faa9d
EG		 4999 ieee80211_report_disconnect(sdata, frame_buf,
5000 sizeof(frame_buf), true,
5001 req->reason_code);
c9c3a060
JB		 5002 return 0;
5003 }
86552017 5004
c9c3a060 5005 return -ENOTCONN;
f0706e82 5006}
84363e6e 5007
77fdaa12 5008int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 5009 struct cfg80211_disassoc_request *req)
9c6bd790 5010{
77fdaa12 5011 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 5012 u8 bssid[ETH_ALEN];
6ae16775 5013 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
9c6bd790 5014
8d8b261a
JB		 5015 /*
5016 * cfg80211 should catch this ... but it's racy since
5017 * we can receive a disassoc frame, process it, hand it
5018 * to cfg80211 while that's in a locked section already
5019 * trying to tell us that the user wants to disconnect.
5020 */
8d61ffa5 5021 if (ifmgd->associated != req->bss)
77fdaa12 5022 return -ENOLINK;
77fdaa12 5023
bdcbd8e0 5024 sdata_info(sdata,
dfa1ad29
CO		 5025 "disassociating from %pM by local choice (Reason: %u=%s)\n",
5026 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
0ff71613 5027
e69e95db 5028 memcpy(bssid, req->bss->bssid, ETH_ALEN);
37ad3888
JB		 5029 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
5030 req->reason_code, !req->local_state_change,
5031 frame_buf);
10f644a4 5032
a90faa9d
EG		 5033 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
5034 req->reason_code);
bc83b681 5035
10f644a4
JB		 5036 return 0;
5037}
026331c4 5038
afa762f6 5039void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
54e4ffb2
JB		 5040{
5041 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5042
49921859
BG		 5043 /*
5044 * Make sure some work items will not run after this,
5045 * they will not do anything but might not have been
5046 * cancelled when disconnecting.
5047 */
5048 cancel_work_sync(&ifmgd->monitor_work);
5049 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5050 cancel_work_sync(&ifmgd->request_smps_work);
5051 cancel_work_sync(&ifmgd->csa_connection_drop_work);
5052 cancel_work_sync(&ifmgd->chswitch_work);
81dd2b88 5053 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
49921859 5054
8d61ffa5 5055 sdata_lock(sdata);
959867fa
JB		 5056 if (ifmgd->assoc_data) {
5057 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
54e4ffb2 5058 ieee80211_destroy_assoc_data(sdata, false);
959867fa
JB		 5059 cfg80211_assoc_timeout(sdata->dev, bss);
5060 }
54e4ffb2
JB		 5061 if (ifmgd->auth_data)
5062 ieee80211_destroy_auth_data(sdata, false);
1277b4a9
LK		 5063 spin_lock_bh(&ifmgd->teardown_lock);
5064 if (ifmgd->teardown_skb) {
5065 kfree_skb(ifmgd->teardown_skb);
5066 ifmgd->teardown_skb = NULL;
5067 ifmgd->orig_teardown_skb = NULL;
5068 }
5069 spin_unlock_bh(&ifmgd->teardown_lock);
54e4ffb2 5070 del_timer_sync(&ifmgd->timer);
8d61ffa5 5071 sdata_unlock(sdata);
54e4ffb2
JB		 5072}
5073
a97c13c3
JO		 5074void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
5075 enum nl80211_cqm_rssi_threshold_event rssi_event,
5076 gfp_t gfp)
5077{
5078 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5079
b5878a2d
JB		 5080 trace_api_cqm_rssi_notify(sdata, rssi_event);
5081
a97c13c3
JO		 5082 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
5083}
5084EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
98f03342
JB		 5085
5086void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
5087{
5088 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5089
5090 trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
5091
5092 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
5093}
5094EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);
ubuntu-zesty-kernel mirror