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mac80211: document status.freq restrictions
[deliverable/linux.git] / net / mac80211 / mlme.c
CommitLineData
f0706e82
JB		 1/*
2 * BSS client mode implementation
5394af4d 3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
f0706e82
JB		 4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
d98ad83e 8 * Copyright 2013-2014 Intel Mobile Communications GmbH
322cd406 9 * Copyright (C) 2015 Intel Deutschland GmbH
f0706e82
JB		 10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License version 2 as
13 * published by the Free Software Foundation.
14 */
15
5b323edb 16#include <linux/delay.h>
f0706e82
JB		 17#include <linux/if_ether.h>
18#include <linux/skbuff.h>
f0706e82 19#include <linux/if_arp.h>
f0706e82 20#include <linux/etherdevice.h>
d9b93842 21#include <linux/moduleparam.h>
d0709a65 22#include <linux/rtnetlink.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
391a200a
JM		 83/*
84 * How many Beacon frames need to have been used in average signal strength
85 * before starting to indicate signal change events.
86 */
87#define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
88
ca386f31
JB		 89/*
90 * We can have multiple work items (and connection probing)
91 * scheduling this timer, but we need to take care to only
92 * reschedule it when it should fire _earlier_ than it was
93 * asked for before, or if it's not pending right now. This
94 * function ensures that. Note that it then is required to
95 * run this function for all timeouts after the first one
96 * has happened -- the work that runs from this timer will
97 * do that.
98 */
8d61ffa5
JB		 99static void run_again(struct ieee80211_sub_if_data *sdata,
100 unsigned long timeout)
ca386f31 101{
8d61ffa5 102 sdata_assert_lock(sdata);
ca386f31 103
8d61ffa5
JB		 104 if (!timer_pending(&sdata->u.mgd.timer) ||
105 time_before(timeout, sdata->u.mgd.timer.expires))
106 mod_timer(&sdata->u.mgd.timer, timeout);
ca386f31
JB		 107}
108
d3a910a8 109void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
b291ba11 110{
c1288b12 111 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
b291ba11
JB		 112 return;
113
30686bf7 114 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
7eeff74c
JB		 115 return;
116
b291ba11 117 mod_timer(&sdata->u.mgd.bcn_mon_timer,
7ccc8bd7 118 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
b291ba11
JB		 119}
120
be099e82
LR		 121void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
122{
0c699c3a
LR		 123 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
124
8628172f
SG		 125 if (unlikely(!sdata->u.mgd.associated))
126 return;
127
448cd2e2
EP		 128 ifmgd->probe_send_count = 0;
129
30686bf7 130 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
be099e82
LR		 131 return;
132
133 mod_timer(&sdata->u.mgd.conn_mon_timer,
134 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
135}
136
5484e237 137static int ecw2cw(int ecw)
60f8b39c 138{
5484e237 139 return (1 << ecw) - 1;
60f8b39c
JB		 140}
141
6565ec9b
JB		 142static u32
143ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
144 struct ieee80211_supported_band *sband,
145 struct ieee80211_channel *channel,
53b954ee 146 const struct ieee80211_ht_cap *ht_cap,
6565ec9b
JB		 147 const struct ieee80211_ht_operation *ht_oper,
148 const struct ieee80211_vht_operation *vht_oper,
5cdaed1e 149 struct cfg80211_chan_def *chandef, bool tracking)
6565ec9b 150{
5cdaed1e 151 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6565ec9b 152 struct cfg80211_chan_def vht_chandef;
179b8fc7 153 struct ieee80211_sta_ht_cap sta_ht_cap;
6565ec9b
JB		 154 u32 ht_cfreq, ret;
155
179b8fc7
CRI		 156 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
157 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
158
6565ec9b
JB		 159 chandef->chan = channel;
160 chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
161 chandef->center_freq1 = channel->center_freq;
162 chandef->center_freq2 = 0;
163
179b8fc7 164 if (!ht_cap || !ht_oper || !sta_ht_cap.ht_supported) {
6565ec9b
JB		 165 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
166 goto out;
167 }
168
169 chandef->width = NL80211_CHAN_WIDTH_20;
170
53b954ee
EP		 171 if (!(ht_cap->cap_info &
172 cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40))) {
f3000e1b 173 ret = IEEE80211_STA_DISABLE_40MHZ;
7e6225a1 174 vht_chandef = *chandef;
53b954ee
EP		 175 goto out;
176 }
177
6565ec9b
JB		 178 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
179 channel->band);
180 /* check that channel matches the right operating channel */
5cdaed1e 181 if (!tracking && channel->center_freq != ht_cfreq) {
6565ec9b
JB		 182 /*
183 * It's possible that some APs are confused here;
184 * Netgear WNDR3700 sometimes reports 4 higher than
185 * the actual channel in association responses, but
186 * since we look at probe response/beacon data here
187 * it should be OK.
188 */
5cdaed1e
JB		 189 sdata_info(sdata,
190 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
191 channel->center_freq, ht_cfreq,
192 ht_oper->primary_chan, channel->band);
6565ec9b
JB		 193 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
194 goto out;
195 }
196
197 /* check 40 MHz support, if we have it */
179b8fc7 198 if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
6565ec9b
JB		 199 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
200 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
201 chandef->width = NL80211_CHAN_WIDTH_40;
202 chandef->center_freq1 += 10;
203 break;
204 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
205 chandef->width = NL80211_CHAN_WIDTH_40;
206 chandef->center_freq1 -= 10;
207 break;
208 }
209 } else {
210 /* 40 MHz (and 80 MHz) must be supported for VHT */
211 ret = IEEE80211_STA_DISABLE_VHT;
85220d71
JB		 212 /* also mark 40 MHz disabled */
213 ret |= IEEE80211_STA_DISABLE_40MHZ;
6565ec9b
JB		 214 goto out;
215 }
216
217 if (!vht_oper || !sband->vht_cap.vht_supported) {
218 ret = IEEE80211_STA_DISABLE_VHT;
219 goto out;
220 }
221
222 vht_chandef.chan = channel;
223 vht_chandef.center_freq1 =
224 ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx,
225 channel->band);
226 vht_chandef.center_freq2 = 0;
227
6565ec9b
JB		 228 switch (vht_oper->chan_width) {
229 case IEEE80211_VHT_CHANWIDTH_USE_HT:
230 vht_chandef.width = chandef->width;
cb664981 231 vht_chandef.center_freq1 = chandef->center_freq1;
6565ec9b
JB		 232 break;
233 case IEEE80211_VHT_CHANWIDTH_80MHZ:
234 vht_chandef.width = NL80211_CHAN_WIDTH_80;
235 break;
236 case IEEE80211_VHT_CHANWIDTH_160MHZ:
237 vht_chandef.width = NL80211_CHAN_WIDTH_160;
238 break;
239 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
240 vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
6553bf04
JB		 241 vht_chandef.center_freq2 =
242 ieee80211_channel_to_frequency(
243 vht_oper->center_freq_seg2_idx,
244 channel->band);
6565ec9b
JB		 245 break;
246 default:
5cdaed1e 247 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
30eb1dc2
JB		 248 sdata_info(sdata,
249 "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
250 vht_oper->chan_width);
6565ec9b
JB		 251 ret = IEEE80211_STA_DISABLE_VHT;
252 goto out;
253 }
254
255 if (!cfg80211_chandef_valid(&vht_chandef)) {
5cdaed1e 256 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
30eb1dc2
JB		 257 sdata_info(sdata,
258 "AP VHT information is invalid, disable VHT\n");
6565ec9b
JB		 259 ret = IEEE80211_STA_DISABLE_VHT;
260 goto out;
261 }
262
263 if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
264 ret = 0;
265 goto out;
266 }
267
268 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
5cdaed1e 269 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
30eb1dc2
JB		 270 sdata_info(sdata,
271 "AP VHT information doesn't match HT, disable VHT\n");
6565ec9b
JB		 272 ret = IEEE80211_STA_DISABLE_VHT;
273 goto out;
274 }
275
276 *chandef = vht_chandef;
277
278 ret = 0;
279
280out:
963a1852
JB		 281 /*
282 * When tracking the current AP, don't do any further checks if the
283 * new chandef is identical to the one we're currently using for the
284 * connection. This keeps us from playing ping-pong with regulatory,
285 * without it the following can happen (for example):
286 * - connect to an AP with 80 MHz, world regdom allows 80 MHz
287 * - AP advertises regdom US
288 * - CRDA loads regdom US with 80 MHz prohibited (old database)
289 * - the code below detects an unsupported channel, downgrades, and
290 * we disconnect from the AP in the caller
291 * - disconnect causes CRDA to reload world regdomain and the game
292 * starts anew.
293 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
294 *
295 * It seems possible that there are still scenarios with CSA or real
296 * bandwidth changes where a this could happen, but those cases are
297 * less common and wouldn't completely prevent using the AP.
298 */
299 if (tracking &&
300 cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef))
301 return ret;
302
586e01ed
JB		 303 /* don't print the message below for VHT mismatch if VHT is disabled */
304 if (ret & IEEE80211_STA_DISABLE_VHT)
305 vht_chandef = *chandef;
306
ddfe49b4
JB		 307 /*
308 * Ignore the DISABLED flag when we're already connected and only
309 * tracking the APs beacon for bandwidth changes - otherwise we
310 * might get disconnected here if we connect to an AP, update our
311 * regulatory information based on the AP's country IE and the
312 * information we have is wrong/outdated and disables the channel
313 * that we're actually using for the connection to the AP.
314 */
6565ec9b 315 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
ddfe49b4
JB		 316 tracking ? 0 :
317 IEEE80211_CHAN_DISABLED)) {
6565ec9b
JB		 318 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
319 ret = IEEE80211_STA_DISABLE_HT |
320 IEEE80211_STA_DISABLE_VHT;
b56e4b85 321 break;
6565ec9b
JB		 322 }
323
e6b7cde4 324 ret |= ieee80211_chandef_downgrade(chandef);
6565ec9b
JB		 325 }
326
5cdaed1e 327 if (chandef->width != vht_chandef.width && !tracking)
6565ec9b
JB		 328 sdata_info(sdata,
329 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
330
331 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
332 return ret;
333}
334
30eb1dc2
JB		 335static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
336 struct sta_info *sta,
53b954ee 337 const struct ieee80211_ht_cap *ht_cap,
30eb1dc2
JB		 338 const struct ieee80211_ht_operation *ht_oper,
339 const struct ieee80211_vht_operation *vht_oper,
340 const u8 *bssid, u32 *changed)
d5522e03
JB		 341{
342 struct ieee80211_local *local = sdata->local;
30eb1dc2 343 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d5522e03 344 struct ieee80211_supported_band *sband;
55de908a 345 struct ieee80211_channel *chan;
30eb1dc2 346 struct cfg80211_chan_def chandef;
9ed6bcce 347 u16 ht_opmode;
30eb1dc2
JB		 348 u32 flags;
349 enum ieee80211_sta_rx_bandwidth new_sta_bw;
350 int ret;
d5522e03 351
30eb1dc2
JB		 352 /* if HT was/is disabled, don't track any bandwidth changes */
353 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
1128958d
JB		 354 return 0;
355
30eb1dc2
JB		 356 /* don't check VHT if we associated as non-VHT station */
357 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
358 vht_oper = NULL;
359
360 if (WARN_ON_ONCE(!sta))
361 return -EINVAL;
362
017b45bb
AA		 363 /*
364 * if bss configuration changed store the new one -
365 * this may be applicable even if channel is identical
366 */
367 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
368 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
369 *changed |= BSS_CHANGED_HT;
370 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
371 }
372
f2d9330e 373 chan = sdata->vif.bss_conf.chandef.chan;
55de908a 374 sband = local->hw.wiphy->bands[chan->band];
d5522e03 375
30eb1dc2 376 /* calculate new channel (type) based on HT/VHT operation IEs */
53b954ee
EP		 377 flags = ieee80211_determine_chantype(sdata, sband, chan,
378 ht_cap, ht_oper, vht_oper,
379 &chandef, true);
30eb1dc2
JB		 380
381 /*
382 * Downgrade the new channel if we associated with restricted
383 * capabilities. For example, if we associated as a 20 MHz STA
384 * to a 40 MHz AP (due to regulatory, capabilities or config
385 * reasons) then switching to a 40 MHz channel now won't do us
386 * any good -- we couldn't use it with the AP.
387 */
388 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
389 chandef.width == NL80211_CHAN_WIDTH_80P80)
e6b7cde4 390 flags |= ieee80211_chandef_downgrade(&chandef);
30eb1dc2
JB		 391 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
392 chandef.width == NL80211_CHAN_WIDTH_160)
e6b7cde4 393 flags |= ieee80211_chandef_downgrade(&chandef);
30eb1dc2
JB		 394 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
395 chandef.width > NL80211_CHAN_WIDTH_20)
e6b7cde4 396 flags |= ieee80211_chandef_downgrade(&chandef);
30eb1dc2
JB		 397
398 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
399 return 0;
400
401 sdata_info(sdata,
402 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
403 ifmgd->bssid, chandef.chan->center_freq, chandef.width,
404 chandef.center_freq1, chandef.center_freq2);
405
406 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
407 IEEE80211_STA_DISABLE_VHT |
408 IEEE80211_STA_DISABLE_40MHZ |
409 IEEE80211_STA_DISABLE_80P80MHZ |
410 IEEE80211_STA_DISABLE_160MHZ)) ||
411 !cfg80211_chandef_valid(&chandef)) {
412 sdata_info(sdata,
413 "AP %pM changed bandwidth in a way we can't support - disconnect\n",
414 ifmgd->bssid);
415 return -EINVAL;
416 }
417
418 switch (chandef.width) {
419 case NL80211_CHAN_WIDTH_20_NOHT:
420 case NL80211_CHAN_WIDTH_20:
421 new_sta_bw = IEEE80211_STA_RX_BW_20;
422 break;
4bf88530 423 case NL80211_CHAN_WIDTH_40:
30eb1dc2 424 new_sta_bw = IEEE80211_STA_RX_BW_40;
64f68e5d 425 break;
30eb1dc2
JB		 426 case NL80211_CHAN_WIDTH_80:
427 new_sta_bw = IEEE80211_STA_RX_BW_80;
428 break;
429 case NL80211_CHAN_WIDTH_80P80:
430 case NL80211_CHAN_WIDTH_160:
431 new_sta_bw = IEEE80211_STA_RX_BW_160;
64f68e5d 432 break;
30eb1dc2
JB		 433 default:
434 return -EINVAL;
64f68e5d 435 }
d5522e03 436
30eb1dc2
JB		 437 if (new_sta_bw > sta->cur_max_bandwidth)
438 new_sta_bw = sta->cur_max_bandwidth;
64f68e5d 439
30eb1dc2
JB		 440 if (new_sta_bw < sta->sta.bandwidth) {
441 sta->sta.bandwidth = new_sta_bw;
442 rate_control_rate_update(local, sband, sta,
443 IEEE80211_RC_BW_CHANGED);
444 }
64f68e5d 445
30eb1dc2
JB		 446 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
447 if (ret) {
448 sdata_info(sdata,
449 "AP %pM changed bandwidth to incompatible one - disconnect\n",
450 ifmgd->bssid);
451 return ret;
452 }
7cc44ed4 453
30eb1dc2
JB		 454 if (new_sta_bw > sta->sta.bandwidth) {
455 sta->sta.bandwidth = new_sta_bw;
456 rate_control_rate_update(local, sband, sta,
457 IEEE80211_RC_BW_CHANGED);
0aaffa9b 458 }
d5522e03 459
30eb1dc2 460 return 0;
d5522e03
JB		 461}
462
9c6bd790
JB		 463/* frame sending functions */
464
66e67e41 465static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
9dde6423 466 struct sk_buff *skb, u8 ap_ht_param,
66e67e41
JB		 467 struct ieee80211_supported_band *sband,
468 struct ieee80211_channel *channel,
469 enum ieee80211_smps_mode smps)
470{
66e67e41
JB		 471 u8 *pos;
472 u32 flags = channel->flags;
473 u16 cap;
474 struct ieee80211_sta_ht_cap ht_cap;
475
476 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
477
66e67e41
JB		 478 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
479 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
480
66e67e41
JB		 481 /* determine capability flags */
482 cap = ht_cap.cap;
483
9dde6423 484 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
66e67e41
JB		 485 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
486 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
487 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
488 cap &= ~IEEE80211_HT_CAP_SGI_40;
489 }
490 break;
491 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
492 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
493 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
494 cap &= ~IEEE80211_HT_CAP_SGI_40;
495 }
496 break;
497 }
498
24398e39
JB		 499 /*
500 * If 40 MHz was disabled associate as though we weren't
501 * capable of 40 MHz -- some broken APs will never fall
502 * back to trying to transmit in 20 MHz.
503 */
504 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
505 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
506 cap &= ~IEEE80211_HT_CAP_SGI_40;
507 }
508
66e67e41
JB		 509 /* set SM PS mode properly */
510 cap &= ~IEEE80211_HT_CAP_SM_PS;
511 switch (smps) {
512 case IEEE80211_SMPS_AUTOMATIC:
513 case IEEE80211_SMPS_NUM_MODES:
514 WARN_ON(1);
515 case IEEE80211_SMPS_OFF:
516 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
517 IEEE80211_HT_CAP_SM_PS_SHIFT;
518 break;
519 case IEEE80211_SMPS_STATIC:
520 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
521 IEEE80211_HT_CAP_SM_PS_SHIFT;
522 break;
523 case IEEE80211_SMPS_DYNAMIC:
524 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
525 IEEE80211_HT_CAP_SM_PS_SHIFT;
526 break;
527 }
528
529 /* reserve and fill IE */
530 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
531 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
532}
533
322cd406
SS		 534/* This function determines vht capability flags for the association
535 * and builds the IE.
536 * Note - the function may set the owner of the MU-MIMO capability
537 */
d545daba
MP		 538static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
539 struct sk_buff *skb,
b08fbbd8
JB		 540 struct ieee80211_supported_band *sband,
541 struct ieee80211_vht_cap *ap_vht_cap)
d545daba 542{
322cd406 543 struct ieee80211_local *local = sdata->local;
d545daba
MP		 544 u8 *pos;
545 u32 cap;
546 struct ieee80211_sta_vht_cap vht_cap;
c1cf6d4e 547 u32 mask, ap_bf_sts, our_bf_sts;
d545daba
MP		 548
549 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
550
551 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
dd5ecfea 552 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
d545daba
MP		 553
554 /* determine capability flags */
555 cap = vht_cap.cap;
556
f2d9d270 557 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
575f0530
JB		 558 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
559
560 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
561 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ ||
562 bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
563 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
f2d9d270
JB		 564 }
565
566 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
567 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
575f0530 568 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
f2d9d270
JB		 569 }
570
b08fbbd8
JB		 571 /*
572 * Some APs apparently get confused if our capabilities are better
573 * than theirs, so restrict what we advertise in the assoc request.
574 */
575 if (!(ap_vht_cap->vht_cap_info &
576 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
322cd406
SS		 577 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
578 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE);
579 else if (!(ap_vht_cap->vht_cap_info &
580 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE)))
581 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
582
583 /*
584 * If some other vif is using the MU-MIMO capablity we cannot associate
585 * using MU-MIMO - this will lead to contradictions in the group-id
586 * mechanism.
587 * Ownership is defined since association request, in order to avoid
588 * simultaneous associations with MU-MIMO.
589 */
590 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) {
591 bool disable_mu_mimo = false;
592 struct ieee80211_sub_if_data *other;
593
594 list_for_each_entry_rcu(other, &local->interfaces, list) {
595 if (other->flags & IEEE80211_SDATA_MU_MIMO_OWNER) {
596 disable_mu_mimo = true;
597 break;
598 }
599 }
600 if (disable_mu_mimo)
601 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
602 else
603 sdata->flags |= IEEE80211_SDATA_MU_MIMO_OWNER;
604 }
b08fbbd8 605
c1cf6d4e
ES		 606 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK;
607
608 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask;
609 our_bf_sts = cap & mask;
610
611 if (ap_bf_sts < our_bf_sts) {
612 cap &= ~mask;
613 cap |= ap_bf_sts;
614 }
615
d545daba 616 /* reserve and fill IE */
d4950281 617 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
d545daba
MP		 618 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
619}
620
66e67e41
JB		 621static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
622{
623 struct ieee80211_local *local = sdata->local;
624 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
625 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
626 struct sk_buff *skb;
627 struct ieee80211_mgmt *mgmt;
628 u8 *pos, qos_info;
629 size_t offset = 0, noffset;
2103dec1 630 int i, count, rates_len, supp_rates_len, shift;
66e67e41
JB		 631 u16 capab;
632 struct ieee80211_supported_band *sband;
55de908a
JB		 633 struct ieee80211_chanctx_conf *chanctx_conf;
634 struct ieee80211_channel *chan;
2103dec1 635 u32 rate_flags, rates = 0;
66e67e41 636
8d61ffa5 637 sdata_assert_lock(sdata);
66e67e41 638
55de908a
JB		 639 rcu_read_lock();
640 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
641 if (WARN_ON(!chanctx_conf)) {
642 rcu_read_unlock();
643 return;
644 }
4bf88530 645 chan = chanctx_conf->def.chan;
2103dec1 646 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
55de908a
JB		 647 rcu_read_unlock();
648 sband = local->hw.wiphy->bands[chan->band];
2103dec1 649 shift = ieee80211_vif_get_shift(&sdata->vif);
66e67e41
JB		 650
651 if (assoc_data->supp_rates_len) {
652 /*
653 * Get all rates supported by the device and the AP as
654 * some APs don't like getting a superset of their rates
655 * in the association request (e.g. D-Link DAP 1353 in
656 * b-only mode)...
657 */
2103dec1
SW		 658 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
659 assoc_data->supp_rates,
660 assoc_data->supp_rates_len,
661 &rates);
66e67e41
JB		 662 } else {
663 /*
664 * In case AP not provide any supported rates information
665 * before association, we send information element(s) with
666 * all rates that we support.
667 */
2103dec1
SW		 668 rates_len = 0;
669 for (i = 0; i < sband->n_bitrates; i++) {
670 if ((rate_flags & sband->bitrates[i].flags)
671 != rate_flags)
672 continue;
673 rates |= BIT(i);
674 rates_len++;
675 }
66e67e41
JB		 676 }
677
678 skb = alloc_skb(local->hw.extra_tx_headroom +
679 sizeof(*mgmt) + /* bit too much but doesn't matter */
680 2 + assoc_data->ssid_len + /* SSID */
681 4 + rates_len + /* (extended) rates */
682 4 + /* power capability */
683 2 + 2 * sband->n_channels + /* supported channels */
684 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
d4950281 685 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
66e67e41
JB		 686 assoc_data->ie_len + /* extra IEs */
687 9, /* WMM */
688 GFP_KERNEL);
689 if (!skb)
690 return;
691
692 skb_reserve(skb, local->hw.extra_tx_headroom);
693
694 capab = WLAN_CAPABILITY_ESS;
695
696 if (sband->band == IEEE80211_BAND_2GHZ) {
ea1b2b45
JB		 697 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
698 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
66e67e41
JB		 699 }
700
701 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
702 capab |= WLAN_CAPABILITY_PRIVACY;
703
704 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
30686bf7 705 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT))
66e67e41
JB		 706 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
707
cd2f5dd7
AK		 708 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM)
709 capab |= WLAN_CAPABILITY_RADIO_MEASURE;
710
66e67e41
JB		 711 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
712 memset(mgmt, 0, 24);
713 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
714 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
715 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
716
717 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
718 skb_put(skb, 10);
719 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
720 IEEE80211_STYPE_REASSOC_REQ);
721 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
722 mgmt->u.reassoc_req.listen_interval =
723 cpu_to_le16(local->hw.conf.listen_interval);
724 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
725 ETH_ALEN);
726 } else {
727 skb_put(skb, 4);
728 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
729 IEEE80211_STYPE_ASSOC_REQ);
730 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
731 mgmt->u.assoc_req.listen_interval =
732 cpu_to_le16(local->hw.conf.listen_interval);
733 }
734
735 /* SSID */
736 pos = skb_put(skb, 2 + assoc_data->ssid_len);
737 *pos++ = WLAN_EID_SSID;
738 *pos++ = assoc_data->ssid_len;
739 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
740
741 /* add all rates which were marked to be used above */
742 supp_rates_len = rates_len;
743 if (supp_rates_len > 8)
744 supp_rates_len = 8;
745
746 pos = skb_put(skb, supp_rates_len + 2);
747 *pos++ = WLAN_EID_SUPP_RATES;
748 *pos++ = supp_rates_len;
749
750 count = 0;
751 for (i = 0; i < sband->n_bitrates; i++) {
752 if (BIT(i) & rates) {
2103dec1
SW		 753 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
754 5 * (1 << shift));
755 *pos++ = (u8) rate;
66e67e41
JB		 756 if (++count == 8)
757 break;
758 }
759 }
760
761 if (rates_len > count) {
762 pos = skb_put(skb, rates_len - count + 2);
763 *pos++ = WLAN_EID_EXT_SUPP_RATES;
764 *pos++ = rates_len - count;
765
766 for (i++; i < sband->n_bitrates; i++) {
767 if (BIT(i) & rates) {
2103dec1
SW		 768 int rate;
769 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
770 5 * (1 << shift));
771 *pos++ = (u8) rate;
66e67e41
JB		 772 }
773 }
774 }
775
cd2f5dd7
AK		 776 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT ||
777 capab & WLAN_CAPABILITY_RADIO_MEASURE) {
66e67e41
JB		 778 pos = skb_put(skb, 4);
779 *pos++ = WLAN_EID_PWR_CAPABILITY;
780 *pos++ = 2;
781 *pos++ = 0; /* min tx power */
0430c883
SW		 782 /* max tx power */
783 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
cd2f5dd7 784 }
66e67e41 785
cd2f5dd7 786 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
66e67e41
JB		 787 /* TODO: get this in reg domain format */
788 pos = skb_put(skb, 2 * sband->n_channels + 2);
789 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
790 *pos++ = 2 * sband->n_channels;
791 for (i = 0; i < sband->n_channels; i++) {
792 *pos++ = ieee80211_frequency_to_channel(
793 sband->channels[i].center_freq);
794 *pos++ = 1; /* one channel in the subband*/
795 }
796 }
797
798 /* if present, add any custom IEs that go before HT */
b3f51e94 799 if (assoc_data->ie_len) {
66e67e41
JB		 800 static const u8 before_ht[] = {
801 WLAN_EID_SSID,
802 WLAN_EID_SUPP_RATES,
803 WLAN_EID_EXT_SUPP_RATES,
804 WLAN_EID_PWR_CAPABILITY,
805 WLAN_EID_SUPPORTED_CHANNELS,
806 WLAN_EID_RSN,
807 WLAN_EID_QOS_CAPA,
808 WLAN_EID_RRM_ENABLED_CAPABILITIES,
809 WLAN_EID_MOBILITY_DOMAIN,
8ed28747
JB		 810 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */
811 WLAN_EID_RIC_DATA, /* reassoc only */
66e67e41
JB		 812 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
813 };
8ed28747
JB		 814 static const u8 after_ric[] = {
815 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
816 WLAN_EID_HT_CAPABILITY,
817 WLAN_EID_BSS_COEX_2040,
818 WLAN_EID_EXT_CAPABILITY,
819 WLAN_EID_QOS_TRAFFIC_CAPA,
820 WLAN_EID_TIM_BCAST_REQ,
821 WLAN_EID_INTERWORKING,
822 /* 60GHz doesn't happen right now */
823 WLAN_EID_VHT_CAPABILITY,
824 WLAN_EID_OPMODE_NOTIF,
825 };
826
827 noffset = ieee80211_ie_split_ric(assoc_data->ie,
828 assoc_data->ie_len,
829 before_ht,
830 ARRAY_SIZE(before_ht),
831 after_ric,
832 ARRAY_SIZE(after_ric),
833 offset);
66e67e41
JB		 834 pos = skb_put(skb, noffset - offset);
835 memcpy(pos, assoc_data->ie + offset, noffset - offset);
836 offset = noffset;
837 }
838
f2d9d270
JB		 839 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
840 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
841 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
842
a8243b72 843 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
9dde6423 844 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
04ecd257 845 sband, chan, sdata->smps_mode);
66e67e41 846
3de3802c
JB		 847 /* if present, add any custom IEs that go before VHT */
848 if (assoc_data->ie_len) {
849 static const u8 before_vht[] = {
850 WLAN_EID_SSID,
851 WLAN_EID_SUPP_RATES,
852 WLAN_EID_EXT_SUPP_RATES,
853 WLAN_EID_PWR_CAPABILITY,
854 WLAN_EID_SUPPORTED_CHANNELS,
855 WLAN_EID_RSN,
856 WLAN_EID_QOS_CAPA,
857 WLAN_EID_RRM_ENABLED_CAPABILITIES,
858 WLAN_EID_MOBILITY_DOMAIN,
859 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
860 WLAN_EID_HT_CAPABILITY,
861 WLAN_EID_BSS_COEX_2040,
862 WLAN_EID_EXT_CAPABILITY,
863 WLAN_EID_QOS_TRAFFIC_CAPA,
864 WLAN_EID_TIM_BCAST_REQ,
865 WLAN_EID_INTERWORKING,
866 };
8ed28747
JB		 867
868 /* RIC already taken above, so no need to handle here anymore */
3de3802c
JB		 869 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
870 before_vht, ARRAY_SIZE(before_vht),
871 offset);
872 pos = skb_put(skb, noffset - offset);
873 memcpy(pos, assoc_data->ie + offset, noffset - offset);
874 offset = noffset;
875 }
876
d545daba 877 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
b08fbbd8
JB		 878 ieee80211_add_vht_ie(sdata, skb, sband,
879 &assoc_data->ap_vht_cap);
d545daba 880
66e67e41 881 /* if present, add any custom non-vendor IEs that go after HT */
b3f51e94 882 if (assoc_data->ie_len) {
66e67e41
JB		 883 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
884 assoc_data->ie_len,
885 offset);
886 pos = skb_put(skb, noffset - offset);
887 memcpy(pos, assoc_data->ie + offset, noffset - offset);
888 offset = noffset;
889 }
890
76f0303d
JB		 891 if (assoc_data->wmm) {
892 if (assoc_data->uapsd) {
dc41e4d4
EP		 893 qos_info = ifmgd->uapsd_queues;
894 qos_info |= (ifmgd->uapsd_max_sp_len <<
66e67e41
JB		 895 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
896 } else {
897 qos_info = 0;
898 }
899
40b861a0 900 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
66e67e41
JB		 901 }
902
903 /* add any remaining custom (i.e. vendor specific here) IEs */
b3f51e94 904 if (assoc_data->ie_len) {
66e67e41
JB		 905 noffset = assoc_data->ie_len;
906 pos = skb_put(skb, noffset - offset);
907 memcpy(pos, assoc_data->ie + offset, noffset - offset);
908 }
909
a1845fc7
JB		 910 drv_mgd_prepare_tx(local, sdata);
911
66e67e41 912 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
30686bf7 913 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1672c0e3
JB		 914 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
915 IEEE80211_TX_INTFL_MLME_CONN_TX;
66e67e41
JB		 916 ieee80211_tx_skb(sdata, skb);
917}
918
572e0012
KV		 919void ieee80211_send_pspoll(struct ieee80211_local *local,
920 struct ieee80211_sub_if_data *sdata)
921{
572e0012
KV		 922 struct ieee80211_pspoll *pspoll;
923 struct sk_buff *skb;
572e0012 924
d8cd189e
KV		 925 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
926 if (!skb)
572e0012 927 return;
572e0012 928
d8cd189e
KV		 929 pspoll = (struct ieee80211_pspoll *) skb->data;
930 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
572e0012 931
62ae67be
JB		 932 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
933 ieee80211_tx_skb(sdata, skb);
572e0012
KV		 934}
935
965bedad
JB		 936void ieee80211_send_nullfunc(struct ieee80211_local *local,
937 struct ieee80211_sub_if_data *sdata,
076cdcb1 938 bool powersave)
965bedad
JB		 939{
940 struct sk_buff *skb;
d8cd189e 941 struct ieee80211_hdr_3addr *nullfunc;
b6f35301 942 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
965bedad 943
d8cd189e
KV		 944 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
945 if (!skb)
965bedad 946 return;
965bedad 947
d8cd189e 948 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
965bedad 949 if (powersave)
d8cd189e 950 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
965bedad 951
6c17b77b
SF		 952 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
953 IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
ff40b425 954
30686bf7 955 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
ff40b425
PF		 956 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
957
392b9ffb 958 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
b6f35301
RM		 959 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
960
62ae67be 961 ieee80211_tx_skb(sdata, skb);
965bedad
JB		 962}
963
d524215f
FF		 964static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
965 struct ieee80211_sub_if_data *sdata)
966{
967 struct sk_buff *skb;
968 struct ieee80211_hdr *nullfunc;
969 __le16 fc;
970
971 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
972 return;
973
974 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
d15b8459 975 if (!skb)
d524215f 976 return;
d15b8459 977
d524215f
FF		 978 skb_reserve(skb, local->hw.extra_tx_headroom);
979
980 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
981 memset(nullfunc, 0, 30);
982 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
983 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
984 nullfunc->frame_control = fc;
985 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
986 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
987 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
988 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
989
990 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
991 ieee80211_tx_skb(sdata, skb);
992}
993
cc32abd4
JB		 994/* spectrum management related things */
995static void ieee80211_chswitch_work(struct work_struct *work)
996{
997 struct ieee80211_sub_if_data *sdata =
998 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
675a0b04 999 struct ieee80211_local *local = sdata->local;
cc32abd4 1000 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
7578d575 1001 int ret;
cc32abd4 1002
9607e6b6 1003 if (!ieee80211_sdata_running(sdata))
cc32abd4
JB		 1004 return;
1005
8d61ffa5 1006 sdata_lock(sdata);
4c3ebc56
MK		 1007 mutex_lock(&local->mtx);
1008 mutex_lock(&local->chanctx_mtx);
1009
77fdaa12
JB		 1010 if (!ifmgd->associated)
1011 goto out;
cc32abd4 1012
4c3ebc56
MK		 1013 if (!sdata->vif.csa_active)
1014 goto out;
1015
1016 /*
1017 * using reservation isn't immediate as it may be deferred until later
1018 * with multi-vif. once reservation is complete it will re-schedule the
1019 * work with no reserved_chanctx so verify chandef to check if it
1020 * completed successfully
1021 */
1022
1023 if (sdata->reserved_chanctx) {
1024 /*
1025 * with multi-vif csa driver may call ieee80211_csa_finish()
1026 * many times while waiting for other interfaces to use their
1027 * reservations
1028 */
1029 if (sdata->reserved_ready)
1030 goto out;
1031
1032 ret = ieee80211_vif_use_reserved_context(sdata);
1033 if (ret) {
1034 sdata_info(sdata,
1035 "failed to use reserved channel context, disconnecting (err=%d)\n",
1036 ret);
1037 ieee80211_queue_work(&sdata->local->hw,
1038 &ifmgd->csa_connection_drop_work);
1039 goto out;
1040 }
1041
1042 goto out;
1043 }
1044
1045 if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
1046 &sdata->csa_chandef)) {
7578d575 1047 sdata_info(sdata,
4c3ebc56 1048 "failed to finalize channel switch, disconnecting\n");
7578d575
AN		 1049 ieee80211_queue_work(&sdata->local->hw,
1050 &ifmgd->csa_connection_drop_work);
1051 goto out;
1052 }
675a0b04 1053
cc32abd4 1054 /* XXX: shouldn't really modify cfg80211-owned data! */
33787fc4 1055 ifmgd->associated->channel = sdata->csa_chandef.chan;
cc32abd4 1056
0c21e632
LC		 1057 ifmgd->csa_waiting_bcn = true;
1058
1059 ieee80211_sta_reset_beacon_monitor(sdata);
1060 ieee80211_sta_reset_conn_monitor(sdata);
1061
1062out:
1063 mutex_unlock(&local->chanctx_mtx);
1064 mutex_unlock(&local->mtx);
1065 sdata_unlock(sdata);
1066}
1067
1068static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata)
1069{
1070 struct ieee80211_local *local = sdata->local;
1071 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1072 int ret;
1073
1074 sdata_assert_lock(sdata);
1075
1076 WARN_ON(!sdata->vif.csa_active);
4c3ebc56 1077
a46992b4
LC		 1078 if (sdata->csa_block_tx) {
1079 ieee80211_wake_vif_queues(local, sdata,
1080 IEEE80211_QUEUE_STOP_REASON_CSA);
1081 sdata->csa_block_tx = false;
1082 }
7578d575 1083
0c21e632
LC		 1084 sdata->vif.csa_active = false;
1085 ifmgd->csa_waiting_bcn = false;
1086
f1d65583
LC		 1087 ret = drv_post_channel_switch(sdata);
1088 if (ret) {
1089 sdata_info(sdata,
1090 "driver post channel switch failed, disconnecting\n");
1091 ieee80211_queue_work(&local->hw,
1092 &ifmgd->csa_connection_drop_work);
0c21e632 1093 return;
f1d65583 1094 }
688b1ecf
LC		 1095
1096 cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef);
cc32abd4
JB		 1097}
1098
5ce6e438
JB		 1099void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1100{
55de908a
JB		 1101 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1102 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5ce6e438
JB		 1103
1104 trace_api_chswitch_done(sdata, success);
1105 if (!success) {
882a7c69
JB		 1106 sdata_info(sdata,
1107 "driver channel switch failed, disconnecting\n");
1108 ieee80211_queue_work(&sdata->local->hw,
1109 &ifmgd->csa_connection_drop_work);
1110 } else {
1111 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
5ce6e438 1112 }
5ce6e438
JB		 1113}
1114EXPORT_SYMBOL(ieee80211_chswitch_done);
1115
cc32abd4
JB		 1116static void ieee80211_chswitch_timer(unsigned long data)
1117{
1118 struct ieee80211_sub_if_data *sdata =
1119 (struct ieee80211_sub_if_data *) data;
5bb644a0 1120
9b7d72c1 1121 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
cc32abd4
JB		 1122}
1123
37799e52 1124static void
4a3cb702 1125ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
2ba45384
LC		 1126 u64 timestamp, u32 device_timestamp,
1127 struct ieee802_11_elems *elems,
04a161f4 1128 bool beacon)
cc32abd4 1129{
b4f286a1 1130 struct ieee80211_local *local = sdata->local;
cc32abd4 1131 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
37799e52 1132 struct cfg80211_bss *cbss = ifmgd->associated;
4c3ebc56 1133 struct ieee80211_chanctx_conf *conf;
55de908a 1134 struct ieee80211_chanctx *chanctx;
e6b7cde4 1135 enum ieee80211_band current_band;
c0f17eb9 1136 struct ieee80211_csa_ie csa_ie;
6d027bcc 1137 struct ieee80211_channel_switch ch_switch;
e6b7cde4 1138 int res;
cc32abd4 1139
8d61ffa5 1140 sdata_assert_lock(sdata);
77fdaa12 1141
37799e52 1142 if (!cbss)
cc32abd4
JB		 1143 return;
1144
b4f286a1 1145 if (local->scanning)
cc32abd4
JB		 1146 return;
1147
37799e52 1148 /* disregard subsequent announcements if we are already processing */
3e2a0226 1149 if (sdata->vif.csa_active)
cc32abd4
JB		 1150 return;
1151
e6b7cde4 1152 current_band = cbss->channel->band;
c0f17eb9 1153 memset(&csa_ie, 0, sizeof(csa_ie));
84469a45 1154 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band,
e6b7cde4 1155 ifmgd->flags,
c0f17eb9 1156 ifmgd->associated->bssid, &csa_ie);
e6b7cde4 1157 if (res < 0)
b4f286a1 1158 ieee80211_queue_work(&local->hw,
882a7c69 1159 &ifmgd->csa_connection_drop_work);
e6b7cde4 1160 if (res)
cc32abd4 1161 return;
cd64f2a9 1162
c0f17eb9 1163 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
85220d71
JB		 1164 IEEE80211_CHAN_DISABLED)) {
1165 sdata_info(sdata,
1166 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
e6b7cde4 1167 ifmgd->associated->bssid,
c0f17eb9
CYY		 1168 csa_ie.chandef.chan->center_freq,
1169 csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1170 csa_ie.chandef.center_freq2);
85220d71
JB		 1171 ieee80211_queue_work(&local->hw,
1172 &ifmgd->csa_connection_drop_work);
1173 return;
1174 }
1175
f84eaa10
JB		 1176 if (cfg80211_chandef_identical(&csa_ie.chandef,
1177 &sdata->vif.bss_conf.chandef)) {
1178 if (ifmgd->csa_ignored_same_chan)
1179 return;
1180 sdata_info(sdata,
1181 "AP %pM tries to chanswitch to same channel, ignore\n",
1182 ifmgd->associated->bssid);
1183 ifmgd->csa_ignored_same_chan = true;
1184 return;
1185 }
1186
c5a71688
AN		 1187 /*
1188 * Drop all TDLS peers - either we disconnect or move to a different
1189 * channel from this point on. There's no telling what our peer will do.
1190 * The TDLS WIDER_BW scenario is also problematic, as peers might now
1191 * have an incompatible wider chandef.
1192 */
1193 ieee80211_teardown_tdls_peers(sdata);
1194
4c3ebc56 1195 mutex_lock(&local->mtx);
7578d575 1196 mutex_lock(&local->chanctx_mtx);
4c3ebc56
MK		 1197 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1198 lockdep_is_held(&local->chanctx_mtx));
1199 if (!conf) {
1200 sdata_info(sdata,
1201 "no channel context assigned to vif?, disconnecting\n");
f3b0bbb3 1202 goto drop_connection;
4c3ebc56
MK		 1203 }
1204
1205 chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1206
0f791eb4 1207 if (local->use_chanctx &&
30686bf7 1208 !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) {
0f791eb4
LC		 1209 sdata_info(sdata,
1210 "driver doesn't support chan-switch with channel contexts\n");
f3b0bbb3 1211 goto drop_connection;
55de908a
JB		 1212 }
1213
6d027bcc
LC		 1214 ch_switch.timestamp = timestamp;
1215 ch_switch.device_timestamp = device_timestamp;
1216 ch_switch.block_tx = csa_ie.mode;
1217 ch_switch.chandef = csa_ie.chandef;
1218 ch_switch.count = csa_ie.count;
1219
1220 if (drv_pre_channel_switch(sdata, &ch_switch)) {
1221 sdata_info(sdata,
1222 "preparing for channel switch failed, disconnecting\n");
f3b0bbb3 1223 goto drop_connection;
6d027bcc
LC		 1224 }
1225
4c3ebc56
MK		 1226 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1227 chanctx->mode, false);
1228 if (res) {
55de908a 1229 sdata_info(sdata,
4c3ebc56
MK		 1230 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1231 res);
f3b0bbb3 1232 goto drop_connection;
55de908a 1233 }
b4f286a1 1234 mutex_unlock(&local->chanctx_mtx);
55de908a 1235
c46a73f3 1236 sdata->vif.csa_active = true;
4c3ebc56 1237 sdata->csa_chandef = csa_ie.chandef;
59af6928 1238 sdata->csa_block_tx = csa_ie.mode;
f84eaa10 1239 ifmgd->csa_ignored_same_chan = false;
55de908a 1240
59af6928 1241 if (sdata->csa_block_tx)
a46992b4
LC		 1242 ieee80211_stop_vif_queues(local, sdata,
1243 IEEE80211_QUEUE_STOP_REASON_CSA);
59af6928 1244 mutex_unlock(&local->mtx);
57eebdf3 1245
2f457293
LC		 1246 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef,
1247 csa_ie.count);
1248
b4f286a1 1249 if (local->ops->channel_switch) {
5ce6e438 1250 /* use driver's channel switch callback */
0f791eb4 1251 drv_channel_switch(local, sdata, &ch_switch);
5ce6e438
JB		 1252 return;
1253 }
1254
1255 /* channel switch handled in software */
c0f17eb9 1256 if (csa_ie.count <= 1)
b4f286a1 1257 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
57eebdf3 1258 else
cc32abd4 1259 mod_timer(&ifmgd->chswitch_timer,
ff1e417c
LC		 1260 TU_TO_EXP_TIME((csa_ie.count - 1) *
1261 cbss->beacon_interval));
f3b0bbb3
JB		 1262 return;
1263 drop_connection:
1264 ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work);
1265 mutex_unlock(&local->chanctx_mtx);
1266 mutex_unlock(&local->mtx);
cc32abd4
JB		 1267}
1268
24a4e400
SG		 1269static bool
1270ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1271 struct ieee80211_channel *channel,
1272 const u8 *country_ie, u8 country_ie_len,
1273 const u8 *pwr_constr_elem,
1274 int *chan_pwr, int *pwr_reduction)
cc32abd4 1275{
04b7b2ff
JB		 1276 struct ieee80211_country_ie_triplet *triplet;
1277 int chan = ieee80211_frequency_to_channel(channel->center_freq);
24a4e400 1278 int i, chan_increment;
04b7b2ff 1279 bool have_chan_pwr = false;
cc32abd4 1280
04b7b2ff
JB		 1281 /* Invalid IE */
1282 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
24a4e400 1283 return false;
cc32abd4 1284
04b7b2ff
JB		 1285 triplet = (void *)(country_ie + 3);
1286 country_ie_len -= 3;
1287
1288 switch (channel->band) {
1289 default:
1290 WARN_ON_ONCE(1);
1291 /* fall through */
1292 case IEEE80211_BAND_2GHZ:
1293 case IEEE80211_BAND_60GHZ:
1294 chan_increment = 1;
1295 break;
1296 case IEEE80211_BAND_5GHZ:
1297 chan_increment = 4;
1298 break;
cc32abd4 1299 }
04b7b2ff
JB		 1300
1301 /* find channel */
1302 while (country_ie_len >= 3) {
1303 u8 first_channel = triplet->chans.first_channel;
1304
1305 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1306 goto next;
1307
1308 for (i = 0; i < triplet->chans.num_channels; i++) {
1309 if (first_channel + i * chan_increment == chan) {
1310 have_chan_pwr = true;
24a4e400 1311 *chan_pwr = triplet->chans.max_power;
04b7b2ff
JB		 1312 break;
1313 }
1314 }
1315 if (have_chan_pwr)
1316 break;
1317
1318 next:
1319 triplet++;
1320 country_ie_len -= 3;
1321 }
1322
a5fee9cb 1323 if (have_chan_pwr && pwr_constr_elem)
24a4e400 1324 *pwr_reduction = *pwr_constr_elem;
a5fee9cb
MB		 1325 else
1326 *pwr_reduction = 0;
1327
24a4e400
SG		 1328 return have_chan_pwr;
1329}
1330
c8d65917
SG		 1331static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
1332 struct ieee80211_channel *channel,
1333 const u8 *cisco_dtpc_ie,
1334 int *pwr_level)
1335{
1336 /* From practical testing, the first data byte of the DTPC element
1337 * seems to contain the requested dBm level, and the CLI on Cisco
1338 * APs clearly state the range is -127 to 127 dBm, which indicates
1339 * a signed byte, although it seemingly never actually goes negative.
1340 * The other byte seems to always be zero.
1341 */
1342 *pwr_level = (__s8)cisco_dtpc_ie[4];
1343}
1344
24a4e400
SG		 1345static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1346 struct ieee80211_channel *channel,
1347 struct ieee80211_mgmt *mgmt,
1348 const u8 *country_ie, u8 country_ie_len,
c8d65917
SG		 1349 const u8 *pwr_constr_ie,
1350 const u8 *cisco_dtpc_ie)
24a4e400 1351{
c8d65917
SG		 1352 bool has_80211h_pwr = false, has_cisco_pwr = false;
1353 int chan_pwr = 0, pwr_reduction_80211h = 0;
1354 int pwr_level_cisco, pwr_level_80211h;
24a4e400 1355 int new_ap_level;
a5fee9cb 1356 __le16 capab = mgmt->u.probe_resp.capab_info;
04b7b2ff 1357
a5fee9cb
MB		 1358 if (country_ie &&
1359 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) ||
1360 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) {
24a4e400
SG		 1361 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
1362 sdata, channel, country_ie, country_ie_len,
1363 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
c8d65917
SG		 1364 pwr_level_80211h =
1365 max_t(int, 0, chan_pwr - pwr_reduction_80211h);
1366 }
1367
1368 if (cisco_dtpc_ie) {
1369 ieee80211_find_cisco_dtpc(
1370 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
1371 has_cisco_pwr = true;
24a4e400 1372 }
04b7b2ff 1373
c8d65917 1374 if (!has_80211h_pwr && !has_cisco_pwr)
1ea6f9c0 1375 return 0;
04b7b2ff 1376
c8d65917
SG		 1377 /* If we have both 802.11h and Cisco DTPC, apply both limits
1378 * by picking the smallest of the two power levels advertised.
1379 */
1380 if (has_80211h_pwr &&
1381 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
a87da0cb
JB		 1382 new_ap_level = pwr_level_80211h;
1383
1384 if (sdata->ap_power_level == new_ap_level)
1385 return 0;
1386
cef2fc1c
JL		 1387 sdata_dbg(sdata,
1388 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1389 pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
1390 sdata->u.mgd.bssid);
c8d65917 1391 } else { /* has_cisco_pwr is always true here. */
a87da0cb
JB		 1392 new_ap_level = pwr_level_cisco;
1393
1394 if (sdata->ap_power_level == new_ap_level)
1395 return 0;
1396
cef2fc1c
JL		 1397 sdata_dbg(sdata,
1398 "Limiting TX power to %d dBm as advertised by %pM\n",
1399 pwr_level_cisco, sdata->u.mgd.bssid);
c8d65917 1400 }
04b7b2ff 1401
1ea6f9c0
JB		 1402 sdata->ap_power_level = new_ap_level;
1403 if (__ieee80211_recalc_txpower(sdata))
1404 return BSS_CHANGED_TXPOWER;
1405 return 0;
cc32abd4
JB		 1406}
1407
965bedad
JB		 1408/* powersave */
1409static void ieee80211_enable_ps(struct ieee80211_local *local,
1410 struct ieee80211_sub_if_data *sdata)
1411{
1412 struct ieee80211_conf *conf = &local->hw.conf;
1413
d5edaedc
JB		 1414 /*
1415 * If we are scanning right now then the parameters will
1416 * take effect when scan finishes.
1417 */
fbe9c429 1418 if (local->scanning)
d5edaedc
JB		 1419 return;
1420
965bedad 1421 if (conf->dynamic_ps_timeout > 0 &&
30686bf7 1422 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) {
965bedad
JB		 1423 mod_timer(&local->dynamic_ps_timer, jiffies +
1424 msecs_to_jiffies(conf->dynamic_ps_timeout));
1425 } else {
30686bf7 1426 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK))
076cdcb1 1427 ieee80211_send_nullfunc(local, sdata, true);
375177bf 1428
30686bf7
JB		 1429 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1430 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
2a13052f
JO		 1431 return;
1432
1433 conf->flags |= IEEE80211_CONF_PS;
1434 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965bedad
JB		 1435 }
1436}
1437
1438static void ieee80211_change_ps(struct ieee80211_local *local)
1439{
1440 struct ieee80211_conf *conf = &local->hw.conf;
1441
1442 if (local->ps_sdata) {
965bedad
JB		 1443 ieee80211_enable_ps(local, local->ps_sdata);
1444 } else if (conf->flags & IEEE80211_CONF_PS) {
1445 conf->flags &= ~IEEE80211_CONF_PS;
1446 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1447 del_timer_sync(&local->dynamic_ps_timer);
1448 cancel_work_sync(&local->dynamic_ps_enable_work);
1449 }
1450}
1451
808118cb
JY		 1452static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1453{
1454 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1455 struct sta_info *sta = NULL;
c2c98fde 1456 bool authorized = false;
808118cb
JY		 1457
1458 if (!mgd->powersave)
1459 return false;
1460
05cb9108
JB		 1461 if (mgd->broken_ap)
1462 return false;
1463
808118cb
JY		 1464 if (!mgd->associated)
1465 return false;
1466
392b9ffb 1467 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
808118cb
JY		 1468 return false;
1469
989c6505 1470 if (!mgd->have_beacon)
ce857888
AB		 1471 return false;
1472
808118cb
JY		 1473 rcu_read_lock();
1474 sta = sta_info_get(sdata, mgd->bssid);
1475 if (sta)
c2c98fde 1476 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
808118cb
JY		 1477 rcu_read_unlock();
1478
c2c98fde 1479 return authorized;
808118cb
JY		 1480}
1481
965bedad 1482/* need to hold RTNL or interface lock */
4a733ef1 1483void ieee80211_recalc_ps(struct ieee80211_local *local)
965bedad
JB		 1484{
1485 struct ieee80211_sub_if_data *sdata, *found = NULL;
1486 int count = 0;
195e294d 1487 int timeout;
965bedad 1488
30686bf7 1489 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) {
965bedad
JB		 1490 local->ps_sdata = NULL;
1491 return;
1492 }
1493
1494 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 1495 if (!ieee80211_sdata_running(sdata))
965bedad 1496 continue;
8c7914de
RM		 1497 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1498 /* If an AP vif is found, then disable PS
1499 * by setting the count to zero thereby setting
1500 * ps_sdata to NULL.
1501 */
1502 count = 0;
1503 break;
1504 }
965bedad
JB		 1505 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1506 continue;
1507 found = sdata;
1508 count++;
1509 }
1510
808118cb 1511 if (count == 1 && ieee80211_powersave_allowed(found)) {
4a733ef1 1512 u8 dtimper = found->u.mgd.dtim_period;
10f644a4
JB		 1513 s32 beaconint_us;
1514
10f644a4
JB		 1515 beaconint_us = ieee80211_tu_to_usec(
1516 found->vif.bss_conf.beacon_int);
1517
ff616381 1518 timeout = local->dynamic_ps_forced_timeout;
4a733ef1
JB		 1519 if (timeout < 0)
1520 timeout = 100;
09b85568 1521 local->hw.conf.dynamic_ps_timeout = timeout;
195e294d 1522
4a733ef1
JB		 1523 /* If the TIM IE is invalid, pretend the value is 1 */
1524 if (!dtimper)
1525 dtimper = 1;
1526
1527 local->hw.conf.ps_dtim_period = dtimper;
1528 local->ps_sdata = found;
10f644a4 1529 } else {
965bedad 1530 local->ps_sdata = NULL;
10f644a4 1531 }
965bedad
JB		 1532
1533 ieee80211_change_ps(local);
1534}
1535
ab095877
EP		 1536void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1537{
1538 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1539
1540 if (sdata->vif.bss_conf.ps != ps_allowed) {
1541 sdata->vif.bss_conf.ps = ps_allowed;
1542 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1543 }
1544}
1545
965bedad
JB		 1546void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1547{
1548 struct ieee80211_local *local =
1549 container_of(work, struct ieee80211_local,
1550 dynamic_ps_disable_work);
1551
1552 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1553 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1554 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1555 }
1556
1557 ieee80211_wake_queues_by_reason(&local->hw,
445ea4e8 1558 IEEE80211_MAX_QUEUE_MAP,
cca07b00
LC		 1559 IEEE80211_QUEUE_STOP_REASON_PS,
1560 false);
965bedad
JB		 1561}
1562
1563void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1564{
1565 struct ieee80211_local *local =
1566 container_of(work, struct ieee80211_local,
1567 dynamic_ps_enable_work);
1568 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
5e34069c 1569 struct ieee80211_if_managed *ifmgd;
1ddc2867
RM		 1570 unsigned long flags;
1571 int q;
965bedad
JB		 1572
1573 /* can only happen when PS was just disabled anyway */
1574 if (!sdata)
1575 return;
1576
5e34069c
CL		 1577 ifmgd = &sdata->u.mgd;
1578
965bedad
JB		 1579 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1580 return;
1581
09b85568 1582 if (local->hw.conf.dynamic_ps_timeout > 0) {
77b7023a
AN		 1583 /* don't enter PS if TX frames are pending */
1584 if (drv_tx_frames_pending(local)) {
1ddc2867
RM		 1585 mod_timer(&local->dynamic_ps_timer, jiffies +
1586 msecs_to_jiffies(
1587 local->hw.conf.dynamic_ps_timeout));
1588 return;
1589 }
77b7023a
AN		 1590
1591 /*
1592 * transmission can be stopped by others which leads to
1593 * dynamic_ps_timer expiry. Postpone the ps timer if it
1594 * is not the actual idle state.
1595 */
1596 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1597 for (q = 0; q < local->hw.queues; q++) {
1598 if (local->queue_stop_reasons[q]) {
1599 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1600 flags);
1601 mod_timer(&local->dynamic_ps_timer, jiffies +
1602 msecs_to_jiffies(
1603 local->hw.conf.dynamic_ps_timeout));
1604 return;
1605 }
1606 }
1607 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1ddc2867 1608 }
1ddc2867 1609
30686bf7 1610 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
9c38a8b4 1611 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
a1598383 1612 if (drv_tx_frames_pending(local)) {
e8306f98
VN		 1613 mod_timer(&local->dynamic_ps_timer, jiffies +
1614 msecs_to_jiffies(
1615 local->hw.conf.dynamic_ps_timeout));
a1598383 1616 } else {
076cdcb1 1617 ieee80211_send_nullfunc(local, sdata, true);
e8306f98 1618 /* Flush to get the tx status of nullfunc frame */
3b24f4c6 1619 ieee80211_flush_queues(local, sdata, false);
e8306f98 1620 }
f3e85b9e
VN		 1621 }
1622
30686bf7
JB		 1623 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
1624 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) ||
375177bf
VN		 1625 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1626 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1627 local->hw.conf.flags |= IEEE80211_CONF_PS;
1628 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1629 }
965bedad
JB		 1630}
1631
1632void ieee80211_dynamic_ps_timer(unsigned long data)
1633{
1634 struct ieee80211_local *local = (void *) data;
1635
42935eca 1636 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 1637}
1638
164eb02d
SW		 1639void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1640{
1641 struct delayed_work *delayed_work =
1642 container_of(work, struct delayed_work, work);
1643 struct ieee80211_sub_if_data *sdata =
1644 container_of(delayed_work, struct ieee80211_sub_if_data,
1645 dfs_cac_timer_work);
d2859df5 1646 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
164eb02d 1647
34a3740d
JB		 1648 mutex_lock(&sdata->local->mtx);
1649 if (sdata->wdev.cac_started) {
1650 ieee80211_vif_release_channel(sdata);
1651 cfg80211_cac_event(sdata->dev, &chandef,
1652 NL80211_RADAR_CAC_FINISHED,
1653 GFP_KERNEL);
1654 }
1655 mutex_unlock(&sdata->local->mtx);
164eb02d
SW		 1656}
1657
02219b3a
JB		 1658static bool
1659__ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1660{
1661 struct ieee80211_local *local = sdata->local;
1662 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
cc72f6e2 1663 bool ret = false;
02219b3a
JB		 1664 int ac;
1665
1666 if (local->hw.queues < IEEE80211_NUM_ACS)
1667 return false;
1668
1669 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1670 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
1671 int non_acm_ac;
1672 unsigned long now = jiffies;
1673
1674 if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
1675 tx_tspec->admitted_time &&
1676 time_after(now, tx_tspec->time_slice_start + HZ)) {
1677 tx_tspec->consumed_tx_time = 0;
1678 tx_tspec->time_slice_start = now;
1679
1680 if (tx_tspec->downgraded)
1681 tx_tspec->action =
1682 TX_TSPEC_ACTION_STOP_DOWNGRADE;
1683 }
1684
1685 switch (tx_tspec->action) {
1686 case TX_TSPEC_ACTION_STOP_DOWNGRADE:
1687 /* take the original parameters */
1688 if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac]))
1689 sdata_err(sdata,
1690 "failed to set TX queue parameters for queue %d\n",
1691 ac);
1692 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1693 tx_tspec->downgraded = false;
1694 ret = true;
1695 break;
1696 case TX_TSPEC_ACTION_DOWNGRADE:
1697 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
1698 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1699 ret = true;
1700 break;
1701 }
1702 /* downgrade next lower non-ACM AC */
1703 for (non_acm_ac = ac + 1;
1704 non_acm_ac < IEEE80211_NUM_ACS;
1705 non_acm_ac++)
1706 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
1707 break;
1708 /* The loop will result in using BK even if it requires
1709 * admission control, such configuration makes no sense
1710 * and we have to transmit somehow - the AC selection
1711 * does the same thing.
1712 */
1713 if (drv_conf_tx(local, sdata, ac,
1714 &sdata->tx_conf[non_acm_ac]))
1715 sdata_err(sdata,
1716 "failed to set TX queue parameters for queue %d\n",
1717 ac);
1718 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1719 ret = true;
1720 schedule_delayed_work(&ifmgd->tx_tspec_wk,
1721 tx_tspec->time_slice_start + HZ - now + 1);
1722 break;
1723 case TX_TSPEC_ACTION_NONE:
1724 /* nothing now */
1725 break;
1726 }
1727 }
1728
1729 return ret;
1730}
1731
1732void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1733{
1734 if (__ieee80211_sta_handle_tspec_ac_params(sdata))
1735 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1736}
1737
1738static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
1739{
1740 struct ieee80211_sub_if_data *sdata;
1741
1742 sdata = container_of(work, struct ieee80211_sub_if_data,
1743 u.mgd.tx_tspec_wk.work);
1744 ieee80211_sta_handle_tspec_ac_params(sdata);
1745}
1746
60f8b39c 1747/* MLME */
7d25745d 1748static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
4ced3f74 1749 struct ieee80211_sub_if_data *sdata,
4a3cb702 1750 const u8 *wmm_param, size_t wmm_param_len)
f0706e82 1751{
2ed77ea6 1752 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS];
4ced3f74 1753 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 1754 size_t left;
2ed77ea6 1755 int count, ac;
4a3cb702
JB		 1756 const u8 *pos;
1757 u8 uapsd_queues = 0;
f0706e82 1758
e1b3ec1a 1759 if (!local->ops->conf_tx)
7d25745d 1760 return false;
e1b3ec1a 1761
32c5057b 1762 if (local->hw.queues < IEEE80211_NUM_ACS)
7d25745d 1763 return false;
3434fbd3
JB		 1764
1765 if (!wmm_param)
7d25745d 1766 return false;
3434fbd3 1767
f0706e82 1768 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
7d25745d 1769 return false;
ab13315a
KV		 1770
1771 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
dc41e4d4 1772 uapsd_queues = ifmgd->uapsd_queues;
ab13315a 1773
f0706e82 1774 count = wmm_param[6] & 0x0f;
46900298 1775 if (count == ifmgd->wmm_last_param_set)
7d25745d 1776 return false;
46900298 1777 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 1778
1779 pos = wmm_param + 8;
1780 left = wmm_param_len - 8;
1781
1782 memset(&params, 0, sizeof(params));
1783
00e96dec 1784 sdata->wmm_acm = 0;
f0706e82
JB		 1785 for (; left >= 4; left -= 4, pos += 4) {
1786 int aci = (pos[0] >> 5) & 0x03;
1787 int acm = (pos[0] >> 4) & 0x01;
ab13315a 1788 bool uapsd = false;
f0706e82
JB		 1789
1790 switch (aci) {
0eeb59fe 1791 case 1: /* AC_BK */
2ed77ea6 1792 ac = IEEE80211_AC_BK;
988c0f72 1793 if (acm)
00e96dec 1794 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV		 1795 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1796 uapsd = true;
f0706e82 1797 break;
0eeb59fe 1798 case 2: /* AC_VI */
2ed77ea6 1799 ac = IEEE80211_AC_VI;
988c0f72 1800 if (acm)
00e96dec 1801 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV		 1802 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1803 uapsd = true;
f0706e82 1804 break;
0eeb59fe 1805 case 3: /* AC_VO */
2ed77ea6 1806 ac = IEEE80211_AC_VO;
988c0f72 1807 if (acm)
00e96dec 1808 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV		 1809 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1810 uapsd = true;
f0706e82 1811 break;
0eeb59fe 1812 case 0: /* AC_BE */
f0706e82 1813 default:
2ed77ea6 1814 ac = IEEE80211_AC_BE;
988c0f72 1815 if (acm)
00e96dec 1816 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV		 1817 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1818 uapsd = true;
f0706e82
JB		 1819 break;
1820 }
1821
2ed77ea6 1822 params[ac].aifs = pos[0] & 0x0f;
730a7550 1823
2ed77ea6 1824 if (params[ac].aifs < 2) {
730a7550
EG		 1825 sdata_info(sdata,
1826 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n",
2ed77ea6
JB		 1827 params[ac].aifs, aci);
1828 params[ac].aifs = 2;
730a7550 1829 }
2ed77ea6
JB		 1830 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1831 params[ac].cw_min = ecw2cw(pos[1] & 0x0f);
1832 params[ac].txop = get_unaligned_le16(pos + 2);
1833 params[ac].acm = acm;
1834 params[ac].uapsd = uapsd;
ab13315a 1835
2ed77ea6
JB		 1836 if (params[ac].cw_min > params[ac].cw_max) {
1837 sdata_info(sdata,
1838 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n",
1839 params[ac].cw_min, params[ac].cw_max, aci);
1840 return false;
1841 }
1842 }
1843
1844 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
bdcbd8e0 1845 mlme_dbg(sdata,
2ed77ea6
JB		 1846 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
1847 ac, params[ac].acm,
1848 params[ac].aifs, params[ac].cw_min, params[ac].cw_max,
1849 params[ac].txop, params[ac].uapsd,
1850 ifmgd->tx_tspec[ac].downgraded);
1851 sdata->tx_conf[ac] = params[ac];
1852 if (!ifmgd->tx_tspec[ac].downgraded &&
1853 drv_conf_tx(local, sdata, ac, &params[ac]))
bdcbd8e0 1854 sdata_err(sdata,
2ed77ea6
JB		 1855 "failed to set TX queue parameters for AC %d\n",
1856 ac);
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
b115b972
JD		 1938 if (sdata->vif.p2p ||
1939 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
9caf0364 1940 const struct cfg80211_bss_ies *ies;
488dd7b5 1941
9caf0364
JB		 1942 rcu_read_lock();
1943 ies = rcu_dereference(cbss->ies);
1944 if (ies) {
9caf0364
JB		 1945 int ret;
1946
1947 ret = cfg80211_get_p2p_attr(
1948 ies->data, ies->len,
1949 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
67baf663
JD		 1950 (u8 *) &bss_conf->p2p_noa_attr,
1951 sizeof(bss_conf->p2p_noa_attr));
9caf0364 1952 if (ret >= 2) {
67baf663
JD		 1953 sdata->u.mgd.p2p_noa_index =
1954 bss_conf->p2p_noa_attr.index;
9caf0364 1955 bss_info_changed |= BSS_CHANGED_P2P_PS;
9caf0364 1956 }
488dd7b5 1957 }
9caf0364 1958 rcu_read_unlock();
488dd7b5
JB		 1959 }
1960
b291ba11 1961 /* just to be sure */
925e64c3 1962 ieee80211_stop_poll(sdata);
b291ba11 1963
9ac19a90 1964 ieee80211_led_assoc(local, 1);
9306102e 1965
989c6505 1966 if (sdata->u.mgd.have_beacon) {
826262c3
JB		 1967 /*
1968 * If the AP is buggy we may get here with no DTIM period
1969 * known, so assume it's 1 which is the only safe assumption
1970 * in that case, although if the TIM IE is broken powersave
1971 * probably just won't work at all.
1972 */
1973 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
817cee76 1974 bss_conf->beacon_rate = bss->beacon_rate;
989c6505 1975 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
826262c3 1976 } else {
817cee76 1977 bss_conf->beacon_rate = NULL;
e5b900d2 1978 bss_conf->dtim_period = 0;
826262c3 1979 }
e5b900d2 1980
68542962 1981 bss_conf->assoc = 1;
9cef8737 1982
a97c13c3 1983 /* Tell the driver to monitor connection quality (if supported) */
ea086359 1984 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
68542962 1985 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 1986 bss_info_changed |= BSS_CHANGED_CQM;
1987
68542962 1988 /* Enable ARP filtering */
0f19b41e 1989 if (bss_conf->arp_addr_cnt)
68542962 1990 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
68542962 1991
ae5eb026 1992 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 1993
056508dc 1994 mutex_lock(&local->iflist_mtx);
4a733ef1 1995 ieee80211_recalc_ps(local);
056508dc 1996 mutex_unlock(&local->iflist_mtx);
e0cb686f 1997
04ecd257 1998 ieee80211_recalc_smps(sdata);
ab095877
EP		 1999 ieee80211_recalc_ps_vif(sdata);
2000
9ac19a90 2001 netif_carrier_on(sdata->dev);
f0706e82
JB		 2002}
2003
e69e95db 2004static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
37ad3888
JB		 2005 u16 stype, u16 reason, bool tx,
2006 u8 *frame_buf)
aa458d17 2007{
46900298 2008 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17 2009 struct ieee80211_local *local = sdata->local;
3cc5240b 2010 u32 changed = 0;
aa458d17 2011
8d61ffa5 2012 sdata_assert_lock(sdata);
77fdaa12 2013
37ad3888
JB		 2014 if (WARN_ON_ONCE(tx && !frame_buf))
2015 return;
2016
b291ba11
JB		 2017 if (WARN_ON(!ifmgd->associated))
2018 return;
2019
79543d8e
DS		 2020 ieee80211_stop_poll(sdata);
2021
77fdaa12 2022 ifmgd->associated = NULL;
aa458d17
TW		 2023 netif_carrier_off(sdata->dev);
2024
88bc40e8
EP		 2025 /*
2026 * if we want to get out of ps before disassoc (why?) we have
2027 * to do it before sending disassoc, as otherwise the null-packet
2028 * won't be valid.
2029 */
2030 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2031 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2032 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2033 }
2034 local->ps_sdata = NULL;
2035
ab095877
EP		 2036 /* disable per-vif ps */
2037 ieee80211_recalc_ps_vif(sdata);
2038
14f2ae83
EG		 2039 /* make sure ongoing transmission finishes */
2040 synchronize_net();
2041
3b24f4c6
EG		 2042 /*
2043 * drop any frame before deauth/disassoc, this can be data or
2044 * management frame. Since we are disconnecting, we should not
2045 * insist sending these frames which can take time and delay
2046 * the disconnection and possible the roaming.
2047 */
f823981e 2048 if (tx)
3b24f4c6 2049 ieee80211_flush_queues(local, sdata, true);
f823981e 2050
37ad3888
JB		 2051 /* deauthenticate/disassociate now */
2052 if (tx || frame_buf)
88a9e31c
EP		 2053 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
2054 reason, tx, frame_buf);
37ad3888 2055
3b24f4c6 2056 /* flush out frame - make sure the deauth was actually sent */
37ad3888 2057 if (tx)
3b24f4c6 2058 ieee80211_flush_queues(local, sdata, false);
37ad3888 2059
88a9e31c 2060 /* clear bssid only after building the needed mgmt frames */
c84a67a2 2061 eth_zero_addr(ifmgd->bssid);
88a9e31c 2062
37ad3888 2063 /* remove AP and TDLS peers */
d34ba216 2064 sta_info_flush(sdata);
37ad3888
JB		 2065
2066 /* finally reset all BSS / config parameters */
f5e5bf25
TW		 2067 changed |= ieee80211_reset_erp_info(sdata);
2068
f5e5bf25 2069 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 2070 changed |= BSS_CHANGED_ASSOC;
2071 sdata->vif.bss_conf.assoc = false;
f5e5bf25 2072
67baf663
JD		 2073 ifmgd->p2p_noa_index = -1;
2074 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
2075 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
488dd7b5 2076
dd5ecfea 2077 /* on the next assoc, re-program HT/VHT parameters */
ef96a842
BG		 2078 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
2079 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
dd5ecfea
JB		 2080 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
2081 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
23a1f8d4
SS		 2082
2083 /* reset MU-MIMO ownership and group data */
2084 memset(sdata->vif.bss_conf.mu_group.membership, 0,
2085 sizeof(sdata->vif.bss_conf.mu_group.membership));
2086 memset(sdata->vif.bss_conf.mu_group.position, 0,
2087 sizeof(sdata->vif.bss_conf.mu_group.position));
2088 changed |= BSS_CHANGED_MU_GROUPS;
322cd406 2089 sdata->flags &= ~IEEE80211_SDATA_MU_MIMO_OWNER;
413ad50a 2090
1ea6f9c0 2091 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
a8302de9 2092
520eb820
KV		 2093 del_timer_sync(&local->dynamic_ps_timer);
2094 cancel_work_sync(&local->dynamic_ps_enable_work);
2095
68542962 2096 /* Disable ARP filtering */
0f19b41e 2097 if (sdata->vif.bss_conf.arp_addr_cnt)
68542962 2098 changed |= BSS_CHANGED_ARP_FILTER;
68542962 2099
3abead59
JB		 2100 sdata->vif.bss_conf.qos = false;
2101 changed |= BSS_CHANGED_QOS;
2102
0aaffa9b
JB		 2103 /* The BSSID (not really interesting) and HT changed */
2104 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 2105 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 2106
3abead59 2107 /* disassociated - set to defaults now */
cec66283 2108 ieee80211_set_wmm_default(sdata, false, false);
3abead59 2109
b9dcf712
JB		 2110 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
2111 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
2112 del_timer_sync(&sdata->u.mgd.timer);
2113 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2d9957cc 2114
826262c3 2115 sdata->vif.bss_conf.dtim_period = 0;
817cee76
AB		 2116 sdata->vif.bss_conf.beacon_rate = NULL;
2117
989c6505 2118 ifmgd->have_beacon = false;
826262c3 2119
028e8da0 2120 ifmgd->flags = 0;
34a3740d 2121 mutex_lock(&local->mtx);
028e8da0 2122 ieee80211_vif_release_channel(sdata);
59af6928
MK		 2123
2124 sdata->vif.csa_active = false;
0c21e632 2125 ifmgd->csa_waiting_bcn = false;
f84eaa10 2126 ifmgd->csa_ignored_same_chan = false;
a46992b4
LC		 2127 if (sdata->csa_block_tx) {
2128 ieee80211_wake_vif_queues(local, sdata,
2129 IEEE80211_QUEUE_STOP_REASON_CSA);
2130 sdata->csa_block_tx = false;
2131 }
34a3740d 2132 mutex_unlock(&local->mtx);
2475b1cc 2133
02219b3a
JB		 2134 /* existing TX TSPEC sessions no longer exist */
2135 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
2136 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
2137
2475b1cc 2138 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
aa458d17 2139}
f0706e82 2140
3cf335d5
KV		 2141void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
2142 struct ieee80211_hdr *hdr)
2143{
2144 /*
2145 * We can postpone the mgd.timer whenever receiving unicast frames
2146 * from AP because we know that the connection is working both ways
2147 * at that time. But multicast frames (and hence also beacons) must
2148 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 2149 * data idle periods for sending the periodic probe request to the
2150 * AP we're connected to.
3cf335d5 2151 */
b291ba11
JB		 2152 if (is_multicast_ether_addr(hdr->addr1))
2153 return;
2154
be099e82 2155 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 2156}
f0706e82 2157
4e5ff376
FF		 2158static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
2159{
2160 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
133d40f9 2161 struct ieee80211_local *local = sdata->local;
4e5ff376 2162
133d40f9 2163 mutex_lock(&local->mtx);
392b9ffb
SG		 2164 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
2165 goto out;
4e5ff376 2166
925e64c3 2167 __ieee80211_stop_poll(sdata);
133d40f9
SG		 2168
2169 mutex_lock(&local->iflist_mtx);
4a733ef1 2170 ieee80211_recalc_ps(local);
133d40f9 2171 mutex_unlock(&local->iflist_mtx);
4e5ff376 2172
30686bf7 2173 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
133d40f9 2174 goto out;
4e5ff376
FF		 2175
2176 /*
2177 * We've received a probe response, but are not sure whether
2178 * we have or will be receiving any beacons or data, so let's
2179 * schedule the timers again, just in case.
2180 */
2181 ieee80211_sta_reset_beacon_monitor(sdata);
2182
2183 mod_timer(&ifmgd->conn_mon_timer,
2184 round_jiffies_up(jiffies +
2185 IEEE80211_CONNECTION_IDLE_TIME));
133d40f9 2186out:
133d40f9 2187 mutex_unlock(&local->mtx);
4e5ff376
FF		 2188}
2189
02219b3a
JB		 2190static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
2191 struct ieee80211_hdr *hdr,
2192 u16 tx_time)
2193{
2194 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2195 u16 tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
2196 int ac = ieee80211_ac_from_tid(tid);
2197 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
2198 unsigned long now = jiffies;
2199
2200 if (likely(!tx_tspec->admitted_time))
2201 return;
2202
2203 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2204 tx_tspec->consumed_tx_time = 0;
2205 tx_tspec->time_slice_start = now;
2206
2207 if (tx_tspec->downgraded) {
2208 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
2209 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2210 }
2211 }
2212
2213 if (tx_tspec->downgraded)
2214 return;
2215
2216 tx_tspec->consumed_tx_time += tx_time;
2217
2218 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
2219 tx_tspec->downgraded = true;
2220 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
2221 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2222 }
2223}
2224
4e5ff376 2225void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
02219b3a 2226 struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
4e5ff376 2227{
02219b3a
JB		 2228 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
2229
75706d0e 2230 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF		 2231 return;
2232
4e5ff376
FF		 2233 if (ieee80211_is_nullfunc(hdr->frame_control) &&
2234 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e 2235 if (ack)
cab1c7fd 2236 ieee80211_sta_reset_conn_monitor(sdata);
04ac3c0e
FF		 2237 else
2238 sdata->u.mgd.nullfunc_failed = true;
4e5ff376 2239 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
cab1c7fd 2240 return;
4e5ff376 2241 }
cab1c7fd
WD		 2242
2243 if (ack)
2244 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF		 2245}
2246
a43abf29
ML		 2247static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2248{
2249 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2250 const u8 *ssid;
f01a067d 2251 u8 *dst = ifmgd->associated->bssid;
180205bd 2252 u8 unicast_limit = max(1, max_probe_tries - 3);
f01a067d
LR		 2253
2254 /*
2255 * Try sending broadcast probe requests for the last three
2256 * probe requests after the first ones failed since some
2257 * buggy APs only support broadcast probe requests.
2258 */
2259 if (ifmgd->probe_send_count >= unicast_limit)
2260 dst = NULL;
a43abf29 2261
4e5ff376
FF		 2262 /*
2263 * When the hardware reports an accurate Tx ACK status, it's
2264 * better to send a nullfunc frame instead of a probe request,
2265 * as it will kick us off the AP quickly if we aren't associated
2266 * anymore. The timeout will be reset if the frame is ACKed by
2267 * the AP.
2268 */
992e68bf
SD		 2269 ifmgd->probe_send_count++;
2270
30686bf7 2271 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) {
04ac3c0e 2272 ifmgd->nullfunc_failed = false;
076cdcb1 2273 ieee80211_send_nullfunc(sdata->local, sdata, false);
04ac3c0e 2274 } else {
88c868c4
SG		 2275 int ssid_len;
2276
9caf0364 2277 rcu_read_lock();
4e5ff376 2278 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
88c868c4
SG		 2279 if (WARN_ON_ONCE(ssid == NULL))
2280 ssid_len = 0;
2281 else
2282 ssid_len = ssid[1];
2283
a73f8e21 2284 ieee80211_send_probe_req(sdata, sdata->vif.addr, dst,
a344d677 2285 ssid + 2, ssid_len, NULL,
1672c0e3 2286 0, (u32) -1, true, 0,
55de908a 2287 ifmgd->associated->channel, false);
9caf0364 2288 rcu_read_unlock();
4e5ff376 2289 }
a43abf29 2290
180205bd 2291 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
8d61ffa5 2292 run_again(sdata, ifmgd->probe_timeout);
a43abf29
ML		 2293}
2294
b291ba11
JB		 2295static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2296 bool beacon)
04de8381 2297{
04de8381 2298 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 2299 bool already = false;
34bfc411 2300
9607e6b6 2301 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 2302 return;
2303
8d61ffa5 2304 sdata_lock(sdata);
77fdaa12
JB		 2305
2306 if (!ifmgd->associated)
2307 goto out;
2308
133d40f9
SG		 2309 mutex_lock(&sdata->local->mtx);
2310
2311 if (sdata->local->tmp_channel || sdata->local->scanning) {
2312 mutex_unlock(&sdata->local->mtx);
2313 goto out;
2314 }
2315
a13fbe54 2316 if (beacon) {
bdcbd8e0 2317 mlme_dbg_ratelimited(sdata,
59c1ec2b
BG		 2318 "detected beacon loss from AP (missed %d beacons) - probing\n",
2319 beacon_loss_count);
bdcbd8e0 2320
98f03342 2321 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
a13fbe54 2322 }
04de8381 2323
b291ba11
JB		 2324 /*
2325 * The driver/our work has already reported this event or the
2326 * connection monitoring has kicked in and we have already sent
2327 * a probe request. Or maybe the AP died and the driver keeps
2328 * reporting until we disassociate...
2329 *
2330 * In either case we have to ignore the current call to this
2331 * function (except for setting the correct probe reason bit)
2332 * because otherwise we would reset the timer every time and
2333 * never check whether we received a probe response!
2334 */
392b9ffb 2335 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
b291ba11
JB		 2336 already = true;
2337
12b5f34d
EP		 2338 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2339
133d40f9
SG		 2340 mutex_unlock(&sdata->local->mtx);
2341
b291ba11
JB		 2342 if (already)
2343 goto out;
2344
4e751843 2345 mutex_lock(&sdata->local->iflist_mtx);
4a733ef1 2346 ieee80211_recalc_ps(sdata->local);
4e751843
JB		 2347 mutex_unlock(&sdata->local->iflist_mtx);
2348
a43abf29
ML		 2349 ifmgd->probe_send_count = 0;
2350 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12 2351 out:
8d61ffa5 2352 sdata_unlock(sdata);
04de8381
KV		 2353}
2354
a619a4c0
JO		 2355struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2356 struct ieee80211_vif *vif)
2357{
2358 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2359 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d9b3b28b 2360 struct cfg80211_bss *cbss;
a619a4c0
JO		 2361 struct sk_buff *skb;
2362 const u8 *ssid;
88c868c4 2363 int ssid_len;
a619a4c0
JO		 2364
2365 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2366 return NULL;
2367
8d61ffa5 2368 sdata_assert_lock(sdata);
a619a4c0 2369
d9b3b28b
EP		 2370 if (ifmgd->associated)
2371 cbss = ifmgd->associated;
2372 else if (ifmgd->auth_data)
2373 cbss = ifmgd->auth_data->bss;
2374 else if (ifmgd->assoc_data)
2375 cbss = ifmgd->assoc_data->bss;
2376 else
a619a4c0
JO		 2377 return NULL;
2378
9caf0364 2379 rcu_read_lock();
d9b3b28b 2380 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
88c868c4
SG		 2381 if (WARN_ON_ONCE(ssid == NULL))
2382 ssid_len = 0;
2383 else
2384 ssid_len = ssid[1];
2385
a344d677 2386 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
55de908a 2387 (u32) -1, cbss->channel,
6b77863b 2388 ssid + 2, ssid_len,
85a237fe 2389 NULL, 0, true);
9caf0364 2390 rcu_read_unlock();
a619a4c0
JO		 2391
2392 return skb;
2393}
2394EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2395
a90faa9d
EG		 2396static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata,
2397 const u8 *buf, size_t len, bool tx,
2398 u16 reason)
2399{
2400 struct ieee80211_event event = {
2401 .type = MLME_EVENT,
2402 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT,
2403 .u.mlme.reason = reason,
2404 };
2405
2406 if (tx)
2407 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len);
2408 else
2409 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len);
2410
2411 drv_event_callback(sdata->local, sdata, &event);
2412}
2413
eef9e54c 2414static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
1e4dcd01 2415{
59af6928 2416 struct ieee80211_local *local = sdata->local;
1e4dcd01 2417 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 2418 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
1e4dcd01 2419
8d61ffa5 2420 sdata_lock(sdata);
1e4dcd01 2421 if (!ifmgd->associated) {
8d61ffa5 2422 sdata_unlock(sdata);
1e4dcd01
JO		 2423 return;
2424 }
2425
37ad3888
JB		 2426 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2427 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
eef9e54c 2428 true, frame_buf);
59af6928 2429 mutex_lock(&local->mtx);
7578d575 2430 sdata->vif.csa_active = false;
0c21e632 2431 ifmgd->csa_waiting_bcn = false;
a46992b4
LC		 2432 if (sdata->csa_block_tx) {
2433 ieee80211_wake_vif_queues(local, sdata,
2434 IEEE80211_QUEUE_STOP_REASON_CSA);
2435 sdata->csa_block_tx = false;
2436 }
59af6928 2437 mutex_unlock(&local->mtx);
7da7cc1d 2438
a90faa9d
EG		 2439 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
2440 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2441
8d61ffa5 2442 sdata_unlock(sdata);
1e4dcd01
JO		 2443}
2444
cc74c0c7 2445static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 2446{
2447 struct ieee80211_sub_if_data *sdata =
2448 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 2449 u.mgd.beacon_connection_loss_work);
a85e1d55 2450 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
a85e1d55 2451
976bd9ef
JB		 2452 if (ifmgd->associated)
2453 ifmgd->beacon_loss_count++;
b291ba11 2454
682bd38b 2455 if (ifmgd->connection_loss) {
882a7c69
JB		 2456 sdata_info(sdata, "Connection to AP %pM lost\n",
2457 ifmgd->bssid);
eef9e54c 2458 __ieee80211_disconnect(sdata);
882a7c69 2459 } else {
1e4dcd01 2460 ieee80211_mgd_probe_ap(sdata, true);
882a7c69
JB		 2461 }
2462}
2463
2464static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2465{
2466 struct ieee80211_sub_if_data *sdata =
2467 container_of(work, struct ieee80211_sub_if_data,
2468 u.mgd.csa_connection_drop_work);
2469
eef9e54c 2470 __ieee80211_disconnect(sdata);
b291ba11
JB		 2471}
2472
04de8381
KV		 2473void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2474{
2475 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 2476 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 2477
b5878a2d
JB		 2478 trace_api_beacon_loss(sdata);
2479
682bd38b 2480 sdata->u.mgd.connection_loss = false;
1e4dcd01 2481 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 2482}
2483EXPORT_SYMBOL(ieee80211_beacon_loss);
2484
1e4dcd01
JO		 2485void ieee80211_connection_loss(struct ieee80211_vif *vif)
2486{
2487 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2488 struct ieee80211_hw *hw = &sdata->local->hw;
2489
b5878a2d
JB		 2490 trace_api_connection_loss(sdata);
2491
682bd38b 2492 sdata->u.mgd.connection_loss = true;
1e4dcd01
JO		 2493 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2494}
2495EXPORT_SYMBOL(ieee80211_connection_loss);
2496
2497
66e67e41
JB		 2498static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2499 bool assoc)
2500{
2501 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2502
8d61ffa5 2503 sdata_assert_lock(sdata);
66e67e41 2504
66e67e41 2505 if (!assoc) {
c1e140bf
EG		 2506 /*
2507 * we are not authenticated yet, the only timer that could be
2508 * running is the timeout for the authentication response which
2509 * which is not relevant anymore.
2510 */
2511 del_timer_sync(&sdata->u.mgd.timer);
66e67e41
JB		 2512 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2513
c84a67a2 2514 eth_zero_addr(sdata->u.mgd.bssid);
66e67e41 2515 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
028e8da0 2516 sdata->u.mgd.flags = 0;
34a3740d 2517 mutex_lock(&sdata->local->mtx);
55de908a 2518 ieee80211_vif_release_channel(sdata);
34a3740d 2519 mutex_unlock(&sdata->local->mtx);
66e67e41
JB		 2520 }
2521
5b112d3d 2522 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
66e67e41
JB		 2523 kfree(auth_data);
2524 sdata->u.mgd.auth_data = NULL;
2525}
2526
c9c99f89
JB		 2527static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2528 bool assoc)
2529{
2530 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2531
2532 sdata_assert_lock(sdata);
2533
2534 if (!assoc) {
2535 /*
2536 * we are not associated yet, the only timer that could be
2537 * running is the timeout for the association response which
2538 * which is not relevant anymore.
2539 */
2540 del_timer_sync(&sdata->u.mgd.timer);
2541 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2542
2543 eth_zero_addr(sdata->u.mgd.bssid);
2544 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2545 sdata->u.mgd.flags = 0;
322cd406 2546 sdata->flags &= ~IEEE80211_SDATA_MU_MIMO_OWNER;
c9c99f89
JB		 2547 mutex_lock(&sdata->local->mtx);
2548 ieee80211_vif_release_channel(sdata);
2549 mutex_unlock(&sdata->local->mtx);
2550 }
2551
2552 kfree(assoc_data);
2553 sdata->u.mgd.assoc_data = NULL;
2554}
2555
66e67e41
JB		 2556static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2557 struct ieee80211_mgmt *mgmt, size_t len)
2558{
1672c0e3 2559 struct ieee80211_local *local = sdata->local;
66e67e41
JB		 2560 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2561 u8 *pos;
2562 struct ieee802_11_elems elems;
1672c0e3 2563 u32 tx_flags = 0;
66e67e41
JB		 2564
2565 pos = mgmt->u.auth.variable;
b2e506bf 2566 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
66e67e41
JB		 2567 if (!elems.challenge)
2568 return;
2569 auth_data->expected_transaction = 4;
a1845fc7 2570 drv_mgd_prepare_tx(sdata->local, sdata);
30686bf7 2571 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1672c0e3
JB		 2572 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2573 IEEE80211_TX_INTFL_MLME_CONN_TX;
700e8ea6 2574 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
66e67e41
JB		 2575 elems.challenge - 2, elems.challenge_len + 2,
2576 auth_data->bss->bssid, auth_data->bss->bssid,
2577 auth_data->key, auth_data->key_len,
1672c0e3 2578 auth_data->key_idx, tx_flags);
66e67e41
JB		 2579}
2580
8d61ffa5
JB		 2581static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2582 struct ieee80211_mgmt *mgmt, size_t len)
66e67e41
JB		 2583{
2584 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2585 u8 bssid[ETH_ALEN];
2586 u16 auth_alg, auth_transaction, status_code;
2587 struct sta_info *sta;
a9409093
EG		 2588 struct ieee80211_event event = {
2589 .type = MLME_EVENT,
2590 .u.mlme.data = AUTH_EVENT,
2591 };
66e67e41 2592
8d61ffa5 2593 sdata_assert_lock(sdata);
66e67e41
JB		 2594
2595 if (len < 24 + 6)
8d61ffa5 2596 return;
66e67e41
JB		 2597
2598 if (!ifmgd->auth_data || ifmgd->auth_data->done)
8d61ffa5 2599 return;
66e67e41
JB		 2600
2601 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2602
b203ca39 2603 if (!ether_addr_equal(bssid, mgmt->bssid))
8d61ffa5 2604 return;
66e67e41
JB		 2605
2606 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2607 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2608 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2609
2610 if (auth_alg != ifmgd->auth_data->algorithm ||
0f4126e8
JM		 2611 auth_transaction != ifmgd->auth_data->expected_transaction) {
2612 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2613 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2614 auth_transaction,
2615 ifmgd->auth_data->expected_transaction);
8d61ffa5 2616 return;
0f4126e8 2617 }
66e67e41
JB		 2618
2619 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2620 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2621 mgmt->sa, status_code);
dac211ec 2622 ieee80211_destroy_auth_data(sdata, false);
6ff57cf8 2623 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
a9409093
EG		 2624 event.u.mlme.status = MLME_DENIED;
2625 event.u.mlme.reason = status_code;
2626 drv_event_callback(sdata->local, sdata, &event);
8d61ffa5 2627 return;
66e67e41
JB		 2628 }
2629
2630 switch (ifmgd->auth_data->algorithm) {
2631 case WLAN_AUTH_OPEN:
2632 case WLAN_AUTH_LEAP:
2633 case WLAN_AUTH_FT:
6b8ece3a 2634 case WLAN_AUTH_SAE:
66e67e41
JB		 2635 break;
2636 case WLAN_AUTH_SHARED_KEY:
2637 if (ifmgd->auth_data->expected_transaction != 4) {
2638 ieee80211_auth_challenge(sdata, mgmt, len);
2639 /* need another frame */
8d61ffa5 2640 return;
66e67e41
JB		 2641 }
2642 break;
2643 default:
2644 WARN_ONCE(1, "invalid auth alg %d",
2645 ifmgd->auth_data->algorithm);
8d61ffa5 2646 return;
66e67e41
JB		 2647 }
2648
a9409093
EG		 2649 event.u.mlme.status = MLME_SUCCESS;
2650 drv_event_callback(sdata->local, sdata, &event);
bdcbd8e0 2651 sdata_info(sdata, "authenticated\n");
66e67e41
JB		 2652 ifmgd->auth_data->done = true;
2653 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
89afe614 2654 ifmgd->auth_data->timeout_started = true;
8d61ffa5 2655 run_again(sdata, ifmgd->auth_data->timeout);
66e67e41 2656
6b8ece3a
JM		 2657 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2658 ifmgd->auth_data->expected_transaction != 2) {
2659 /*
2660 * Report auth frame to user space for processing since another
2661 * round of Authentication frames is still needed.
2662 */
6ff57cf8 2663 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
8d61ffa5 2664 return;
6b8ece3a
JM		 2665 }
2666
66e67e41
JB		 2667 /* move station state to auth */
2668 mutex_lock(&sdata->local->sta_mtx);
2669 sta = sta_info_get(sdata, bssid);
2670 if (!sta) {
2671 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2672 goto out_err;
2673 }
2674 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
bdcbd8e0 2675 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
66e67e41
JB		 2676 goto out_err;
2677 }
2678 mutex_unlock(&sdata->local->sta_mtx);
2679
6ff57cf8 2680 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
8d61ffa5 2681 return;
66e67e41
JB		 2682 out_err:
2683 mutex_unlock(&sdata->local->sta_mtx);
2684 /* ignore frame -- wait for timeout */
66e67e41
JB		 2685}
2686
dfa1ad29
CO		 2687#define case_WLAN(type) \
2688 case WLAN_REASON_##type: return #type
2689
2690static const char *ieee80211_get_reason_code_string(u16 reason_code)
2691{
2692 switch (reason_code) {
2693 case_WLAN(UNSPECIFIED);
2694 case_WLAN(PREV_AUTH_NOT_VALID);
2695 case_WLAN(DEAUTH_LEAVING);
2696 case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2697 case_WLAN(DISASSOC_AP_BUSY);
2698 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2699 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2700 case_WLAN(DISASSOC_STA_HAS_LEFT);
2701 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2702 case_WLAN(DISASSOC_BAD_POWER);
2703 case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2704 case_WLAN(INVALID_IE);
2705 case_WLAN(MIC_FAILURE);
2706 case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2707 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2708 case_WLAN(IE_DIFFERENT);
2709 case_WLAN(INVALID_GROUP_CIPHER);
2710 case_WLAN(INVALID_PAIRWISE_CIPHER);
2711 case_WLAN(INVALID_AKMP);
2712 case_WLAN(UNSUPP_RSN_VERSION);
2713 case_WLAN(INVALID_RSN_IE_CAP);
2714 case_WLAN(IEEE8021X_FAILED);
2715 case_WLAN(CIPHER_SUITE_REJECTED);
2716 case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2717 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2718 case_WLAN(DISASSOC_LOW_ACK);
2719 case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2720 case_WLAN(QSTA_LEAVE_QBSS);
2721 case_WLAN(QSTA_NOT_USE);
2722 case_WLAN(QSTA_REQUIRE_SETUP);
2723 case_WLAN(QSTA_TIMEOUT);
2724 case_WLAN(QSTA_CIPHER_NOT_SUPP);
2725 case_WLAN(MESH_PEER_CANCELED);
2726 case_WLAN(MESH_MAX_PEERS);
2727 case_WLAN(MESH_CONFIG);
2728 case_WLAN(MESH_CLOSE);
2729 case_WLAN(MESH_MAX_RETRIES);
2730 case_WLAN(MESH_CONFIRM_TIMEOUT);
2731 case_WLAN(MESH_INVALID_GTK);
2732 case_WLAN(MESH_INCONSISTENT_PARAM);
2733 case_WLAN(MESH_INVALID_SECURITY);
2734 case_WLAN(MESH_PATH_ERROR);
2735 case_WLAN(MESH_PATH_NOFORWARD);
2736 case_WLAN(MESH_PATH_DEST_UNREACHABLE);
2737 case_WLAN(MAC_EXISTS_IN_MBSS);
2738 case_WLAN(MESH_CHAN_REGULATORY);
2739 case_WLAN(MESH_CHAN);
2740 default: return "<unknown>";
2741 }
2742}
66e67e41 2743
8d61ffa5
JB		 2744static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2745 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2746{
46900298 2747 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
c9c99f89 2748 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
f0706e82 2749
8d61ffa5 2750 sdata_assert_lock(sdata);
66e67e41 2751
f4ea83dd 2752 if (len < 24 + 2)
8d61ffa5 2753 return;
f0706e82 2754
c9c99f89
JB		 2755 if (ifmgd->associated &&
2756 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) {
2757 const u8 *bssid = ifmgd->associated->bssid;
77fdaa12 2758
c9c99f89
JB		 2759 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
2760 bssid, reason_code,
2761 ieee80211_get_reason_code_string(reason_code));
f0706e82 2762
c9c99f89 2763 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
f0706e82 2764
c9c99f89
JB		 2765 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false,
2766 reason_code);
2767 return;
2768 }
77fdaa12 2769
c9c99f89
JB		 2770 if (ifmgd->assoc_data &&
2771 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
2772 const u8 *bssid = ifmgd->assoc_data->bss->bssid;
37ad3888 2773
c9c99f89
JB		 2774 sdata_info(sdata,
2775 "deauthenticated from %pM while associating (Reason: %u=%s)\n",
2776 bssid, reason_code,
2777 ieee80211_get_reason_code_string(reason_code));
2778
2779 ieee80211_destroy_assoc_data(sdata, false);
2780
2781 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2782 return;
2783 }
f0706e82
JB		 2784}
2785
2786
8d61ffa5
JB		 2787static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2788 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2789{
46900298 2790 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 2791 u16 reason_code;
2792
8d61ffa5 2793 sdata_assert_lock(sdata);
77fdaa12 2794
66e67e41 2795 if (len < 24 + 2)
8d61ffa5 2796 return;
77fdaa12 2797
66e67e41 2798 if (!ifmgd->associated ||
b203ca39 2799 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
8d61ffa5 2800 return;
f0706e82
JB		 2801
2802 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2803
bdcbd8e0
JB		 2804 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2805 mgmt->sa, reason_code);
f0706e82 2806
37ad3888
JB		 2807 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2808
a90faa9d 2809 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code);
f0706e82
JB		 2810}
2811
c74d084f
CL		 2812static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2813 u8 *supp_rates, unsigned int supp_rates_len,
2814 u32 *rates, u32 *basic_rates,
2815 bool *have_higher_than_11mbit,
2103dec1
SW		 2816 int *min_rate, int *min_rate_index,
2817 int shift, u32 rate_flags)
c74d084f
CL		 2818{
2819 int i, j;
2820
2821 for (i = 0; i < supp_rates_len; i++) {
2103dec1 2822 int rate = supp_rates[i] & 0x7f;
c74d084f
CL		 2823 bool is_basic = !!(supp_rates[i] & 0x80);
2824
2103dec1 2825 if ((rate * 5 * (1 << shift)) > 110)
c74d084f
CL		 2826 *have_higher_than_11mbit = true;
2827
2828 /*
2829 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2830 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2831 *
2832 * Note: Even through the membership selector and the basic
2833 * rate flag share the same bit, they are not exactly
2834 * the same.
2835 */
2836 if (!!(supp_rates[i] & 0x80) &&
2837 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2838 continue;
2839
2840 for (j = 0; j < sband->n_bitrates; j++) {
2103dec1
SW		 2841 struct ieee80211_rate *br;
2842 int brate;
2843
2844 br = &sband->bitrates[j];
2845 if ((rate_flags & br->flags) != rate_flags)
2846 continue;
2847
2848 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2849 if (brate == rate) {
c74d084f
CL		 2850 *rates |= BIT(j);
2851 if (is_basic)
2852 *basic_rates |= BIT(j);
2103dec1
SW		 2853 if ((rate * 5) < *min_rate) {
2854 *min_rate = rate * 5;
c74d084f
CL		 2855 *min_rate_index = j;
2856 }
2857 break;
2858 }
2859 }
2860 }
2861}
f0706e82 2862
66e67e41
JB		 2863static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2864 struct cfg80211_bss *cbss,
af6b6374 2865 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2866{
46900298 2867 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 2868 struct ieee80211_local *local = sdata->local;
8318d78a 2869 struct ieee80211_supported_band *sband;
f0706e82 2870 struct sta_info *sta;
af6b6374 2871 u8 *pos;
af6b6374 2872 u16 capab_info, aid;
f0706e82 2873 struct ieee802_11_elems elems;
bda3933a 2874 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
35d865af
JB		 2875 const struct cfg80211_bss_ies *bss_ies = NULL;
2876 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
ae5eb026 2877 u32 changed = 0;
c74d084f 2878 int err;
35d865af 2879 bool ret;
f0706e82 2880
af6b6374 2881 /* AssocResp and ReassocResp have identical structure */
f0706e82 2882
f0706e82 2883 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 2884 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 2885
1dd84aa2 2886 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
bdcbd8e0
JB		 2887 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2888 aid);
1dd84aa2
JB		 2889 aid &= ~(BIT(15) | BIT(14));
2890
05cb9108
JB		 2891 ifmgd->broken_ap = false;
2892
2893 if (aid == 0 || aid > IEEE80211_MAX_AID) {
bdcbd8e0
JB		 2894 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2895 aid);
05cb9108
JB		 2896 aid = 0;
2897 ifmgd->broken_ap = true;
2898 }
2899
af6b6374 2900 pos = mgmt->u.assoc_resp.variable;
b2e506bf 2901 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
af6b6374 2902
f0706e82 2903 if (!elems.supp_rates) {
bdcbd8e0 2904 sdata_info(sdata, "no SuppRates element in AssocResp\n");
af6b6374 2905 return false;
f0706e82
JB		 2906 }
2907
46900298 2908 ifmgd->aid = aid;
9041c1fa
AN		 2909 ifmgd->tdls_chan_switch_prohibited =
2910 elems.ext_capab && elems.ext_capab_len >= 5 &&
2911 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
f0706e82 2912
35d865af
JB		 2913 /*
2914 * Some APs are erroneously not including some information in their
2915 * (re)association response frames. Try to recover by using the data
2916 * from the beacon or probe response. This seems to afflict mobile
2917 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2918 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2919 */
2920 if ((assoc_data->wmm && !elems.wmm_param) ||
2921 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2922 (!elems.ht_cap_elem || !elems.ht_operation)) ||
2923 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2924 (!elems.vht_cap_elem || !elems.vht_operation))) {
2925 const struct cfg80211_bss_ies *ies;
2926 struct ieee802_11_elems bss_elems;
2927
2928 rcu_read_lock();
2929 ies = rcu_dereference(cbss->ies);
2930 if (ies)
2931 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2932 GFP_ATOMIC);
2933 rcu_read_unlock();
2934 if (!bss_ies)
2935 return false;
2936
2937 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2938 false, &bss_elems);
2939 if (assoc_data->wmm &&
2940 !elems.wmm_param && bss_elems.wmm_param) {
2941 elems.wmm_param = bss_elems.wmm_param;
2942 sdata_info(sdata,
2943 "AP bug: WMM param missing from AssocResp\n");
2944 }
2945
2946 /*
2947 * Also check if we requested HT/VHT, otherwise the AP doesn't
2948 * have to include the IEs in the (re)association response.
2949 */
2950 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2951 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2952 elems.ht_cap_elem = bss_elems.ht_cap_elem;
2953 sdata_info(sdata,
2954 "AP bug: HT capability missing from AssocResp\n");
2955 }
2956 if (!elems.ht_operation && bss_elems.ht_operation &&
2957 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2958 elems.ht_operation = bss_elems.ht_operation;
2959 sdata_info(sdata,
2960 "AP bug: HT operation missing from AssocResp\n");
2961 }
2962 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2963 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2964 elems.vht_cap_elem = bss_elems.vht_cap_elem;
2965 sdata_info(sdata,
2966 "AP bug: VHT capa missing from AssocResp\n");
2967 }
2968 if (!elems.vht_operation && bss_elems.vht_operation &&
2969 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2970 elems.vht_operation = bss_elems.vht_operation;
2971 sdata_info(sdata,
2972 "AP bug: VHT operation missing from AssocResp\n");
2973 }
2974 }
2975
30eb1dc2
JB		 2976 /*
2977 * We previously checked these in the beacon/probe response, so
2978 * they should be present here. This is just a safety net.
2979 */
2980 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2981 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2982 sdata_info(sdata,
35d865af
JB		 2983 "HT AP is missing WMM params or HT capability/operation\n");
2984 ret = false;
2985 goto out;
30eb1dc2
JB		 2986 }
2987
2988 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2989 (!elems.vht_cap_elem || !elems.vht_operation)) {
2990 sdata_info(sdata,
35d865af
JB		 2991 "VHT AP is missing VHT capability/operation\n");
2992 ret = false;
2993 goto out;
30eb1dc2
JB		 2994 }
2995
2a33bee2
GE		 2996 mutex_lock(&sdata->local->sta_mtx);
2997 /*
2998 * station info was already allocated and inserted before
2999 * the association and should be available to us
3000 */
7852e361 3001 sta = sta_info_get(sdata, cbss->bssid);
2a33bee2
GE		 3002 if (WARN_ON(!sta)) {
3003 mutex_unlock(&sdata->local->sta_mtx);
35d865af
JB		 3004 ret = false;
3005 goto out;
77fdaa12 3006 }
05e5e883 3007
55de908a 3008 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
f709fc69 3009
30eb1dc2 3010 /* Set up internal HT/VHT capabilities */
a8243b72 3011 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
ef96a842 3012 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
e1a0c6b3 3013 elems.ht_cap_elem, sta);
64f68e5d 3014
818255ea
MP		 3015 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
3016 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
4a34215e 3017 elems.vht_cap_elem, sta);
818255ea 3018
30eb1dc2
JB		 3019 /*
3020 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
3021 * in their association response, so ignore that data for our own
3022 * configuration. If it changed since the last beacon, we'll get the
3023 * next beacon and update then.
3024 */
1128958d 3025
bee7f586
JB		 3026 /*
3027 * If an operating mode notification IE is present, override the
3028 * NSS calculation (that would be done in rate_control_rate_init())
3029 * and use the # of streams from that element.
3030 */
3031 if (elems.opmode_notif &&
3032 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
3033 u8 nss;
3034
3035 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
3036 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
3037 nss += 1;
3038 sta->sta.rx_nss = nss;
3039 }
3040
4b7679a5 3041 rate_control_rate_init(sta);
f0706e82 3042
93f0490e 3043 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) {
c2c98fde 3044 set_sta_flag(sta, WLAN_STA_MFP);
93f0490e
T		 3045 sta->sta.mfp = true;
3046 } else {
3047 sta->sta.mfp = false;
3048 }
5394af4d 3049
527871d7 3050 sta->sta.wme = elems.wmm_param && local->hw.queues >= IEEE80211_NUM_ACS;
ddf4ac53 3051
3e4d40fa 3052 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
c8987876
JB		 3053 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
3054 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
3055 if (err) {
bdcbd8e0
JB		 3056 sdata_info(sdata,
3057 "failed to move station %pM to desired state\n",
3058 sta->sta.addr);
c8987876
JB		 3059 WARN_ON(__sta_info_destroy(sta));
3060 mutex_unlock(&sdata->local->sta_mtx);
35d865af
JB		 3061 ret = false;
3062 goto out;
c8987876
JB		 3063 }
3064
7852e361 3065 mutex_unlock(&sdata->local->sta_mtx);
ddf4ac53 3066
f2176d72
JO		 3067 /*
3068 * Always handle WMM once after association regardless
3069 * of the first value the AP uses. Setting -1 here has
3070 * that effect because the AP values is an unsigned
3071 * 4-bit value.
3072 */
3073 ifmgd->wmm_last_param_set = -1;
3074
2ed77ea6 3075 if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
cec66283 3076 ieee80211_set_wmm_default(sdata, false, false);
2ed77ea6
JB		 3077 } else if (!ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3078 elems.wmm_param_len)) {
3079 /* still enable QoS since we might have HT/VHT */
3080 ieee80211_set_wmm_default(sdata, false, true);
3081 /* set the disable-WMM flag in this case to disable
3082 * tracking WMM parameter changes in the beacon if
3083 * the parameters weren't actually valid. Doing so
3084 * avoids changing parameters very strangely when
3085 * the AP is going back and forth between valid and
3086 * invalid parameters.
3087 */
3088 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
3089 }
3abead59 3090 changed |= BSS_CHANGED_QOS;
f0706e82 3091
60f8b39c
JB		 3092 /* set AID and assoc capability,
3093 * ieee80211_set_associated() will tell the driver */
3094 bss_conf->aid = aid;
3095 bss_conf->assoc_capability = capab_info;
0c1ad2ca 3096 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 3097
d524215f
FF		 3098 /*
3099 * If we're using 4-addr mode, let the AP know that we're
3100 * doing so, so that it can create the STA VLAN on its side
3101 */
3102 if (ifmgd->use_4addr)
3103 ieee80211_send_4addr_nullfunc(local, sdata);
3104
15b7b062 3105 /*
b291ba11
JB		 3106 * Start timer to probe the connection to the AP now.
3107 * Also start the timer that will detect beacon loss.
15b7b062 3108 */
b291ba11 3109 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 3110 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 3111
35d865af
JB		 3112 ret = true;
3113 out:
3114 kfree(bss_ies);
3115 return ret;
f0706e82
JB		 3116}
3117
8d61ffa5
JB		 3118static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
3119 struct ieee80211_mgmt *mgmt,
3120 size_t len)
66e67e41
JB		 3121{
3122 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3123 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3124 u16 capab_info, status_code, aid;
3125 struct ieee802_11_elems elems;
b0b6aa2c 3126 int ac, uapsd_queues = -1;
66e67e41
JB		 3127 u8 *pos;
3128 bool reassoc;
8d61ffa5 3129 struct cfg80211_bss *bss;
d0d1a12f
EG		 3130 struct ieee80211_event event = {
3131 .type = MLME_EVENT,
3132 .u.mlme.data = ASSOC_EVENT,
3133 };
66e67e41 3134
8d61ffa5 3135 sdata_assert_lock(sdata);
66e67e41
JB		 3136
3137 if (!assoc_data)
8d61ffa5 3138 return;
b203ca39 3139 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
8d61ffa5 3140 return;
66e67e41
JB		 3141
3142 /*
3143 * AssocResp and ReassocResp have identical structure, so process both
3144 * of them in this function.
3145 */
3146
3147 if (len < 24 + 6)
8d61ffa5 3148 return;
66e67e41
JB		 3149
3150 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
3151 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3152 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
3153 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3154
bdcbd8e0
JB		 3155 sdata_info(sdata,
3156 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3157 reassoc ? "Rea" : "A", mgmt->sa,
3158 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
66e67e41
JB		 3159
3160 pos = mgmt->u.assoc_resp.variable;
b2e506bf 3161 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
66e67e41
JB		 3162
3163 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
79ba1d89
JB		 3164 elems.timeout_int &&
3165 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
66e67e41 3166 u32 tu, ms;
79ba1d89 3167 tu = le32_to_cpu(elems.timeout_int->value);
66e67e41 3168 ms = tu * 1024 / 1000;
bdcbd8e0
JB		 3169 sdata_info(sdata,
3170 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3171 mgmt->sa, tu, ms);
66e67e41 3172 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
89afe614 3173 assoc_data->timeout_started = true;
66e67e41 3174 if (ms > IEEE80211_ASSOC_TIMEOUT)
8d61ffa5
JB		 3175 run_again(sdata, assoc_data->timeout);
3176 return;
66e67e41
JB		 3177 }
3178
8d61ffa5 3179 bss = assoc_data->bss;
66e67e41
JB		 3180
3181 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 3182 sdata_info(sdata, "%pM denied association (code=%d)\n",
3183 mgmt->sa, status_code);
66e67e41 3184 ieee80211_destroy_assoc_data(sdata, false);
d0d1a12f
EG		 3185 event.u.mlme.status = MLME_DENIED;
3186 event.u.mlme.reason = status_code;
3187 drv_event_callback(sdata->local, sdata, &event);
66e67e41 3188 } else {
8d61ffa5 3189 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
66e67e41 3190 /* oops -- internal error -- send timeout for now */
10a9109f 3191 ieee80211_destroy_assoc_data(sdata, false);
959867fa 3192 cfg80211_assoc_timeout(sdata->dev, bss);
8d61ffa5 3193 return;
66e67e41 3194 }
d0d1a12f
EG		 3195 event.u.mlme.status = MLME_SUCCESS;
3196 drv_event_callback(sdata->local, sdata, &event);
635d999f 3197 sdata_info(sdata, "associated\n");
79ebfb85
JB		 3198
3199 /*
3200 * destroy assoc_data afterwards, as otherwise an idle
3201 * recalc after assoc_data is NULL but before associated
3202 * is set can cause the interface to go idle
3203 */
3204 ieee80211_destroy_assoc_data(sdata, true);
b0b6aa2c
EP		 3205
3206 /* get uapsd queues configuration */
3207 uapsd_queues = 0;
3208 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
3209 if (sdata->tx_conf[ac].uapsd)
3210 uapsd_queues |= BIT(ac);
66e67e41
JB		 3211 }
3212
b0b6aa2c 3213 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues);
66e67e41 3214}
8e3c1b77 3215
98c8fccf 3216static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
8e3c1b77 3217 struct ieee80211_mgmt *mgmt, size_t len,
98c8fccf 3218 struct ieee80211_rx_status *rx_status,
d45c4172 3219 struct ieee802_11_elems *elems)
98c8fccf
JB		 3220{
3221 struct ieee80211_local *local = sdata->local;
c2b13452 3222 struct ieee80211_bss *bss;
98c8fccf 3223 struct ieee80211_channel *channel;
56007a02 3224
8d61ffa5 3225 sdata_assert_lock(sdata);
b4f286a1 3226
3afc2167
EG		 3227 channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
3228 if (!channel)
98c8fccf
JB		 3229 return;
3230
98c8fccf 3231 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
d45c4172 3232 channel);
817cee76 3233 if (bss) {
817cee76 3234 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
d2722f8b 3235 ieee80211_rx_bss_put(local, bss);
817cee76 3236 }
f0706e82
JB		 3237}
3238
3239
f698d856 3240static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 3241 struct sk_buff *skb)
f0706e82 3242{
af6b6374 3243 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 3244 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 3245 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
3246 size_t baselen, len = skb->len;
ae6a44e3
EK		 3247 struct ieee802_11_elems elems;
3248
15b7b062
KV		 3249 ifmgd = &sdata->u.mgd;
3250
8d61ffa5 3251 sdata_assert_lock(sdata);
77fdaa12 3252
b203ca39 3253 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
8e7cdbb6
TW		 3254 return; /* ignore ProbeResp to foreign address */
3255
ae6a44e3
EK		 3256 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
3257 if (baselen > len)
3258 return;
3259
3260 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
b2e506bf 3261 false, &elems);
ae6a44e3 3262
d45c4172 3263 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
9859b81e 3264
77fdaa12 3265 if (ifmgd->associated &&
b203ca39 3266 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
4e5ff376 3267 ieee80211_reset_ap_probe(sdata);
f0706e82
JB		 3268}
3269
d91f36db
JB		 3270/*
3271 * This is the canonical list of information elements we care about,
3272 * the filter code also gives us all changes to the Microsoft OUI
c8d65917
SG		 3273 * (00:50:F2) vendor IE which is used for WMM which we need to track,
3274 * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3275 * changes to requested client power.
d91f36db
JB		 3276 *
3277 * We implement beacon filtering in software since that means we can
3278 * avoid processing the frame here and in cfg80211, and userspace
3279 * will not be able to tell whether the hardware supports it or not.
3280 *
3281 * XXX: This list needs to be dynamic -- userspace needs to be able to
3282 * add items it requires. It also needs to be able to tell us to
3283 * look out for other vendor IEs.
3284 */
3285static const u64 care_about_ies =
1d4df3a5
JB		 3286 (1ULL << WLAN_EID_COUNTRY) |
3287 (1ULL << WLAN_EID_ERP_INFO) |
3288 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
3289 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
3290 (1ULL << WLAN_EID_HT_CAPABILITY) |
70a3fd6c
JB		 3291 (1ULL << WLAN_EID_HT_OPERATION) |
3292 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN);
d91f36db 3293
8d61ffa5
JB		 3294static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
3295 struct ieee80211_mgmt *mgmt, size_t len,
3296 struct ieee80211_rx_status *rx_status)
f0706e82 3297{
d91f36db 3298 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 3299 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 3300 size_t baselen;
3301 struct ieee802_11_elems elems;
f698d856 3302 struct ieee80211_local *local = sdata->local;
55de908a
JB		 3303 struct ieee80211_chanctx_conf *chanctx_conf;
3304 struct ieee80211_channel *chan;
bee7f586 3305 struct sta_info *sta;
471b3efd 3306 u32 changed = 0;
f87ad637 3307 bool erp_valid;
7a5158ef 3308 u8 erp_value = 0;
d91f36db 3309 u32 ncrc;
77fdaa12 3310 u8 *bssid;
8d61ffa5 3311 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
77fdaa12 3312
8d61ffa5 3313 sdata_assert_lock(sdata);
f0706e82 3314
ae6a44e3
EK		 3315 /* Process beacon from the current BSS */
3316 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3317 if (baselen > len)
8d61ffa5 3318 return;
ae6a44e3 3319
55de908a
JB		 3320 rcu_read_lock();
3321 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3322 if (!chanctx_conf) {
3323 rcu_read_unlock();
8d61ffa5 3324 return;
55de908a
JB		 3325 }
3326
4bf88530 3327 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
55de908a 3328 rcu_read_unlock();
8d61ffa5 3329 return;
55de908a 3330 }
4bf88530 3331 chan = chanctx_conf->def.chan;
55de908a 3332 rcu_read_unlock();
f0706e82 3333
c65dd147 3334 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
b203ca39 3335 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
66e67e41 3336 ieee802_11_parse_elems(mgmt->u.beacon.variable,
b2e506bf 3337 len - baselen, false, &elems);
77fdaa12 3338
d45c4172 3339 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
482a9c74
AB		 3340 if (elems.tim && !elems.parse_error) {
3341 const struct ieee80211_tim_ie *tim_ie = elems.tim;
3342 ifmgd->dtim_period = tim_ie->dtim_period;
3343 }
989c6505 3344 ifmgd->have_beacon = true;
c65dd147 3345 ifmgd->assoc_data->need_beacon = false;
30686bf7 3346 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
ef429dad
JB		 3347 sdata->vif.bss_conf.sync_tsf =
3348 le64_to_cpu(mgmt->u.beacon.timestamp);
3349 sdata->vif.bss_conf.sync_device_ts =
3350 rx_status->device_timestamp;
3351 if (elems.tim)
3352 sdata->vif.bss_conf.sync_dtim_count =
3353 elems.tim->dtim_count;
3354 else
3355 sdata->vif.bss_conf.sync_dtim_count = 0;
3356 }
66e67e41
JB		 3357 /* continue assoc process */
3358 ifmgd->assoc_data->timeout = jiffies;
89afe614 3359 ifmgd->assoc_data->timeout_started = true;
8d61ffa5
JB		 3360 run_again(sdata, ifmgd->assoc_data->timeout);
3361 return;
66e67e41 3362 }
77fdaa12 3363
66e67e41 3364 if (!ifmgd->associated ||
b203ca39 3365 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
8d61ffa5 3366 return;
66e67e41 3367 bssid = ifmgd->associated->bssid;
f0706e82 3368
17e4ec14 3369 /* Track average RSSI from the Beacon frames of the current AP */
17e4ec14
JM		 3370 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3371 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
338c17ae 3372 ewma_beacon_signal_init(&ifmgd->ave_beacon_signal);
17e4ec14 3373 ifmgd->last_cqm_event_signal = 0;
391a200a 3374 ifmgd->count_beacon_signal = 1;
615f7b9b 3375 ifmgd->last_ave_beacon_signal = 0;
17e4ec14 3376 } else {
391a200a 3377 ifmgd->count_beacon_signal++;
17e4ec14 3378 }
615f7b9b 3379
338c17ae
JB		 3380 ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal);
3381
615f7b9b
MV		 3382 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3383 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
338c17ae 3384 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
615f7b9b 3385 int last_sig = ifmgd->last_ave_beacon_signal;
a8182929
EG		 3386 struct ieee80211_event event = {
3387 .type = RSSI_EVENT,
3388 };
615f7b9b
MV		 3389
3390 /*
3391 * if signal crosses either of the boundaries, invoke callback
3392 * with appropriate parameters
3393 */
3394 if (sig > ifmgd->rssi_max_thold &&
3395 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3396 ifmgd->last_ave_beacon_signal = sig;
a8182929
EG		 3397 event.u.rssi.data = RSSI_EVENT_HIGH;
3398 drv_event_callback(local, sdata, &event);
615f7b9b
MV		 3399 } else if (sig < ifmgd->rssi_min_thold &&
3400 (last_sig >= ifmgd->rssi_max_thold ||
3401 last_sig == 0)) {
3402 ifmgd->last_ave_beacon_signal = sig;
a8182929
EG		 3403 event.u.rssi.data = RSSI_EVENT_LOW;
3404 drv_event_callback(local, sdata, &event);
615f7b9b
MV		 3405 }
3406 }
3407
17e4ec14 3408 if (bss_conf->cqm_rssi_thold &&
391a200a 3409 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
ea086359 3410 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
338c17ae 3411 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
17e4ec14
JM		 3412 int last_event = ifmgd->last_cqm_event_signal;
3413 int thold = bss_conf->cqm_rssi_thold;
3414 int hyst = bss_conf->cqm_rssi_hyst;
338c17ae 3415
17e4ec14
JM		 3416 if (sig < thold &&
3417 (last_event == 0 || sig < last_event - hyst)) {
3418 ifmgd->last_cqm_event_signal = sig;
3419 ieee80211_cqm_rssi_notify(
3420 &sdata->vif,
3421 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3422 GFP_KERNEL);
3423 } else if (sig > thold &&
3424 (last_event == 0 || sig > last_event + hyst)) {
3425 ifmgd->last_cqm_event_signal = sig;
3426 ieee80211_cqm_rssi_notify(
3427 &sdata->vif,
3428 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3429 GFP_KERNEL);
3430 }
3431 }
3432
392b9ffb 3433 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
bdcbd8e0 3434 mlme_dbg_ratelimited(sdata,
112c31f0 3435 "cancelling AP probe due to a received beacon\n");
392b9ffb 3436 ieee80211_reset_ap_probe(sdata);
92778180
JM		 3437 }
3438
b291ba11
JB		 3439 /*
3440 * Push the beacon loss detection into the future since
3441 * we are processing a beacon from the AP just now.
3442 */
d3a910a8 3443 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 3444
d91f36db
JB		 3445 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3446 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
b2e506bf 3447 len - baselen, false, &elems,
d91f36db
JB		 3448 care_about_ies, ncrc);
3449
90d13e8f
JB		 3450 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
3451 ieee80211_check_tim(elems.tim, elems.tim_len, ifmgd->aid)) {
3452 if (local->hw.conf.dynamic_ps_timeout > 0) {
3453 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3454 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3455 ieee80211_hw_config(local,
3456 IEEE80211_CONF_CHANGE_PS);
572e0012 3457 }
076cdcb1 3458 ieee80211_send_nullfunc(local, sdata, false);
90d13e8f
JB		 3459 } else if (!local->pspolling && sdata->u.mgd.powersave) {
3460 local->pspolling = true;
3461
3462 /*
3463 * Here is assumed that the driver will be
3464 * able to send ps-poll frame and receive a
3465 * response even though power save mode is
3466 * enabled, but some drivers might require
3467 * to disable power save here. This needs
3468 * to be investigated.
3469 */
3470 ieee80211_send_pspoll(local, sdata);
a97b77b9
VN		 3471 }
3472 }
7a5158ef 3473
b115b972
JD		 3474 if (sdata->vif.p2p ||
3475 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) {
67baf663 3476 struct ieee80211_p2p_noa_attr noa = {};
488dd7b5
JB		 3477 int ret;
3478
3479 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3480 len - baselen,
3481 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
934457ee 3482 (u8 *) &noa, sizeof(noa));
67baf663
JD		 3483 if (ret >= 2) {
3484 if (sdata->u.mgd.p2p_noa_index != noa.index) {
3485 /* valid noa_attr and index changed */
3486 sdata->u.mgd.p2p_noa_index = noa.index;
3487 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3488 changed |= BSS_CHANGED_P2P_PS;
3489 /*
3490 * make sure we update all information, the CRC
3491 * mechanism doesn't look at P2P attributes.
3492 */
3493 ifmgd->beacon_crc_valid = false;
3494 }
3495 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3496 /* noa_attr not found and we had valid noa_attr before */
3497 sdata->u.mgd.p2p_noa_index = -1;
3498 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
488dd7b5 3499 changed |= BSS_CHANGED_P2P_PS;
488dd7b5
JB		 3500 ifmgd->beacon_crc_valid = false;
3501 }
3502 }
3503
0c21e632
LC		 3504 if (ifmgd->csa_waiting_bcn)
3505 ieee80211_chswitch_post_beacon(sdata);
3506
2ecc3905
AB		 3507 /*
3508 * Update beacon timing and dtim count on every beacon appearance. This
3509 * will allow the driver to use the most updated values. Do it before
3510 * comparing this one with last received beacon.
3511 * IMPORTANT: These parameters would possibly be out of sync by the time
3512 * the driver will use them. The synchronized view is currently
3513 * guaranteed only in certain callbacks.
3514 */
30686bf7 3515 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
2ecc3905
AB		 3516 sdata->vif.bss_conf.sync_tsf =
3517 le64_to_cpu(mgmt->u.beacon.timestamp);
3518 sdata->vif.bss_conf.sync_device_ts =
3519 rx_status->device_timestamp;
3520 if (elems.tim)
3521 sdata->vif.bss_conf.sync_dtim_count =
3522 elems.tim->dtim_count;
3523 else
3524 sdata->vif.bss_conf.sync_dtim_count = 0;
3525 }
3526
d8ec4433 3527 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
8d61ffa5 3528 return;
30196673 3529 ifmgd->beacon_crc = ncrc;
d8ec4433 3530 ifmgd->beacon_crc_valid = true;
30196673 3531
d45c4172 3532 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
7d25745d 3533
d70b7616 3534 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
2ba45384 3535 rx_status->device_timestamp,
d70b7616
JB		 3536 &elems, true);
3537
095d81ce
JB		 3538 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3539 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
7d25745d
JB		 3540 elems.wmm_param_len))
3541 changed |= BSS_CHANGED_QOS;
3542
c65dd147
EG		 3543 /*
3544 * If we haven't had a beacon before, tell the driver about the
ef429dad 3545 * DTIM period (and beacon timing if desired) now.
c65dd147 3546 */
989c6505 3547 if (!ifmgd->have_beacon) {
c65dd147
EG		 3548 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3549 if (elems.tim)
3550 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3551 else
3552 bss_conf->dtim_period = 1;
ef429dad 3553
989c6505
AB		 3554 changed |= BSS_CHANGED_BEACON_INFO;
3555 ifmgd->have_beacon = true;
482a9c74
AB		 3556
3557 mutex_lock(&local->iflist_mtx);
4a733ef1 3558 ieee80211_recalc_ps(local);
482a9c74
AB		 3559 mutex_unlock(&local->iflist_mtx);
3560
ce857888 3561 ieee80211_recalc_ps_vif(sdata);
c65dd147
EG		 3562 }
3563
1946bed9 3564 if (elems.erp_info) {
7a5158ef
JB		 3565 erp_valid = true;
3566 erp_value = elems.erp_info[0];
3567 } else {
3568 erp_valid = false;
50c4afb9 3569 }
7a5158ef
JB		 3570 changed |= ieee80211_handle_bss_capability(sdata,
3571 le16_to_cpu(mgmt->u.beacon.capab_info),
3572 erp_valid, erp_value);
f0706e82 3573
1128958d 3574 mutex_lock(&local->sta_mtx);
bee7f586
JB		 3575 sta = sta_info_get(sdata, bssid);
3576
53b954ee
EP		 3577 if (ieee80211_config_bw(sdata, sta,
3578 elems.ht_cap_elem, elems.ht_operation,
30eb1dc2
JB		 3579 elems.vht_operation, bssid, &changed)) {
3580 mutex_unlock(&local->sta_mtx);
3581 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3582 WLAN_REASON_DEAUTH_LEAVING,
3583 true, deauth_buf);
a90faa9d
EG		 3584 ieee80211_report_disconnect(sdata, deauth_buf,
3585 sizeof(deauth_buf), true,
3586 WLAN_REASON_DEAUTH_LEAVING);
8d61ffa5 3587 return;
30eb1dc2 3588 }
bee7f586
JB		 3589
3590 if (sta && elems.opmode_notif)
3591 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
cf1e05c6 3592 rx_status->band);
1128958d 3593 mutex_unlock(&local->sta_mtx);
d3c990fb 3594
24a4e400
SG		 3595 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
3596 elems.country_elem,
3597 elems.country_elem_len,
c8d65917
SG		 3598 elems.pwr_constr_elem,
3599 elems.cisco_dtpc_elem);
3f2355cb 3600
471b3efd 3601 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 3602}
3603
1fa57d01
JB		 3604void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3605 struct sk_buff *skb)
f0706e82
JB		 3606{
3607 struct ieee80211_rx_status *rx_status;
f0706e82
JB		 3608 struct ieee80211_mgmt *mgmt;
3609 u16 fc;
1b3a2e49
JB		 3610 struct ieee802_11_elems elems;
3611 int ies_len;
f0706e82 3612
f0706e82
JB		 3613 rx_status = (struct ieee80211_rx_status *) skb->cb;
3614 mgmt = (struct ieee80211_mgmt *) skb->data;
3615 fc = le16_to_cpu(mgmt->frame_control);
3616
8d61ffa5 3617 sdata_lock(sdata);
77fdaa12 3618
66e67e41
JB		 3619 switch (fc & IEEE80211_FCTL_STYPE) {
3620 case IEEE80211_STYPE_BEACON:
8d61ffa5 3621 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
66e67e41
JB		 3622 break;
3623 case IEEE80211_STYPE_PROBE_RESP:
3624 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3625 break;
3626 case IEEE80211_STYPE_AUTH:
8d61ffa5 3627 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
66e67e41
JB		 3628 break;
3629 case IEEE80211_STYPE_DEAUTH:
8d61ffa5 3630 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
66e67e41
JB		 3631 break;
3632 case IEEE80211_STYPE_DISASSOC:
8d61ffa5 3633 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
66e67e41
JB		 3634 break;
3635 case IEEE80211_STYPE_ASSOC_RESP:
3636 case IEEE80211_STYPE_REASSOC_RESP:
8d61ffa5 3637 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
66e67e41
JB		 3638 break;
3639 case IEEE80211_STYPE_ACTION:
37799e52 3640 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
1b3a2e49
JB		 3641 ies_len = skb->len -
3642 offsetof(struct ieee80211_mgmt,
3643 u.action.u.chan_switch.variable);
37799e52
JB		 3644
3645 if (ies_len < 0)
3646 break;
3647
3648 ieee802_11_parse_elems(
3649 mgmt->u.action.u.chan_switch.variable,
b2e506bf 3650 ies_len, true, &elems);
37799e52
JB		 3651
3652 if (elems.parse_error)
3653 break;
3654
1b3a2e49 3655 ieee80211_sta_process_chanswitch(sdata,
2ba45384
LC		 3656 rx_status->mactime,
3657 rx_status->device_timestamp,
3658 &elems, false);
1b3a2e49
JB		 3659 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3660 ies_len = skb->len -
3661 offsetof(struct ieee80211_mgmt,
3662 u.action.u.ext_chan_switch.variable);
3663
3664 if (ies_len < 0)
3665 break;
3666
3667 ieee802_11_parse_elems(
3668 mgmt->u.action.u.ext_chan_switch.variable,
b2e506bf 3669 ies_len, true, &elems);
1b3a2e49
JB		 3670
3671 if (elems.parse_error)
3672 break;
3673
3674 /* for the handling code pretend this was also an IE */
3675 elems.ext_chansw_ie =
3676 &mgmt->u.action.u.ext_chan_switch.data;
3677
66e67e41 3678 ieee80211_sta_process_chanswitch(sdata,
2ba45384
LC		 3679 rx_status->mactime,
3680 rx_status->device_timestamp,
3681 &elems, false);
77fdaa12 3682 }
37799e52 3683 break;
77fdaa12 3684 }
8d61ffa5 3685 sdata_unlock(sdata);
f0706e82
JB		 3686}
3687
9c6bd790 3688static void ieee80211_sta_timer(unsigned long data)
f0706e82 3689{
60f8b39c
JB		 3690 struct ieee80211_sub_if_data *sdata =
3691 (struct ieee80211_sub_if_data *) data;
5bb644a0 3692
9b7d72c1 3693 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
f0706e82
JB		 3694}
3695
04ac3c0e 3696static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
6b684db1 3697 u8 *bssid, u8 reason, bool tx)
04ac3c0e 3698{
6ae16775 3699 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
04ac3c0e 3700
37ad3888 3701 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
6b684db1 3702 tx, frame_buf);
37ad3888 3703
a90faa9d
EG		 3704 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
3705 reason);
04ac3c0e
FF		 3706}
3707
46cad4b7 3708static int ieee80211_auth(struct ieee80211_sub_if_data *sdata)
66e67e41
JB		 3709{
3710 struct ieee80211_local *local = sdata->local;
3711 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3712 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
1672c0e3 3713 u32 tx_flags = 0;
46cad4b7
JB		 3714 u16 trans = 1;
3715 u16 status = 0;
66e67e41 3716
8d61ffa5 3717 sdata_assert_lock(sdata);
66e67e41
JB		 3718
3719 if (WARN_ON_ONCE(!auth_data))
3720 return -EINVAL;
3721
66e67e41
JB		 3722 auth_data->tries++;
3723
3724 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
bdcbd8e0
JB		 3725 sdata_info(sdata, "authentication with %pM timed out\n",
3726 auth_data->bss->bssid);
66e67e41
JB		 3727
3728 /*
3729 * Most likely AP is not in the range so remove the
3730 * bss struct for that AP.
3731 */
3732 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3733
3734 return -ETIMEDOUT;
3735 }
3736
a1845fc7
JB		 3737 drv_mgd_prepare_tx(local, sdata);
3738
46cad4b7
JB		 3739 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3740 auth_data->bss->bssid, auth_data->tries,
3741 IEEE80211_AUTH_MAX_TRIES);
66e67e41 3742
46cad4b7 3743 auth_data->expected_transaction = 2;
6b8ece3a 3744
46cad4b7
JB		 3745 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3746 trans = auth_data->sae_trans;
3747 status = auth_data->sae_status;
3748 auth_data->expected_transaction = trans;
3749 }
66e67e41 3750
46cad4b7
JB		 3751 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
3752 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3753 IEEE80211_TX_INTFL_MLME_CONN_TX;
66e67e41 3754
46cad4b7
JB		 3755 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3756 auth_data->data, auth_data->data_len,
3757 auth_data->bss->bssid,
3758 auth_data->bss->bssid, NULL, 0, 0,
3759 tx_flags);
66e67e41 3760
6211dd12 3761 if (tx_flags == 0) {
1672c0e3 3762 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
cb236d2d 3763 auth_data->timeout_started = true;
8d61ffa5 3764 run_again(sdata, auth_data->timeout);
89afe614 3765 } else {
cb236d2d
JB		 3766 auth_data->timeout =
3767 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3768 auth_data->timeout_started = true;
3769 run_again(sdata, auth_data->timeout);
1672c0e3 3770 }
66e67e41
JB		 3771
3772 return 0;
3773}
3774
3775static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3776{
3777 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3778 struct ieee80211_local *local = sdata->local;
3779
8d61ffa5 3780 sdata_assert_lock(sdata);
66e67e41 3781
66e67e41
JB		 3782 assoc_data->tries++;
3783 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
bdcbd8e0
JB		 3784 sdata_info(sdata, "association with %pM timed out\n",
3785 assoc_data->bss->bssid);
66e67e41
JB		 3786
3787 /*
3788 * Most likely AP is not in the range so remove the
3789 * bss struct for that AP.
3790 */
3791 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3792
3793 return -ETIMEDOUT;
3794 }
3795
bdcbd8e0
JB		 3796 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3797 assoc_data->bss->bssid, assoc_data->tries,
3798 IEEE80211_ASSOC_MAX_TRIES);
66e67e41
JB		 3799 ieee80211_send_assoc(sdata);
3800
30686bf7 3801 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
1672c0e3 3802 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
89afe614 3803 assoc_data->timeout_started = true;
8d61ffa5 3804 run_again(sdata, assoc_data->timeout);
89afe614 3805 } else {
cb236d2d
JB		 3806 assoc_data->timeout =
3807 round_jiffies_up(jiffies +
3808 IEEE80211_ASSOC_TIMEOUT_LONG);
3809 assoc_data->timeout_started = true;
3810 run_again(sdata, assoc_data->timeout);
1672c0e3 3811 }
66e67e41
JB		 3812
3813 return 0;
3814}
3815
1672c0e3
JB		 3816void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3817 __le16 fc, bool acked)
3818{
3819 struct ieee80211_local *local = sdata->local;
3820
3821 sdata->u.mgd.status_fc = fc;
3822 sdata->u.mgd.status_acked = acked;
3823 sdata->u.mgd.status_received = true;
3824
3825 ieee80211_queue_work(&local->hw, &sdata->work);
3826}
3827
1fa57d01 3828void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 3829{
9c6bd790 3830 struct ieee80211_local *local = sdata->local;
1fa57d01 3831 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 3832
8d61ffa5 3833 sdata_lock(sdata);
77fdaa12 3834
1672c0e3
JB		 3835 if (ifmgd->status_received) {
3836 __le16 fc = ifmgd->status_fc;
3837 bool status_acked = ifmgd->status_acked;
3838
3839 ifmgd->status_received = false;
46cad4b7 3840 if (ifmgd->auth_data && ieee80211_is_auth(fc)) {
1672c0e3
JB		 3841 if (status_acked) {
3842 ifmgd->auth_data->timeout =
3843 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
8d61ffa5 3844 run_again(sdata, ifmgd->auth_data->timeout);
1672c0e3
JB		 3845 } else {
3846 ifmgd->auth_data->timeout = jiffies - 1;
3847 }
89afe614 3848 ifmgd->auth_data->timeout_started = true;
1672c0e3
JB		 3849 } else if (ifmgd->assoc_data &&
3850 (ieee80211_is_assoc_req(fc) ||
3851 ieee80211_is_reassoc_req(fc))) {
3852 if (status_acked) {
3853 ifmgd->assoc_data->timeout =
3854 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
8d61ffa5 3855 run_again(sdata, ifmgd->assoc_data->timeout);
1672c0e3
JB		 3856 } else {
3857 ifmgd->assoc_data->timeout = jiffies - 1;
3858 }
89afe614 3859 ifmgd->assoc_data->timeout_started = true;
1672c0e3
JB		 3860 }
3861 }
3862
89afe614 3863 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
66e67e41
JB		 3864 time_after(jiffies, ifmgd->auth_data->timeout)) {
3865 if (ifmgd->auth_data->done) {
3866 /*
3867 * ok ... we waited for assoc but userspace didn't,
3868 * so let's just kill the auth data
3869 */
3870 ieee80211_destroy_auth_data(sdata, false);
46cad4b7 3871 } else if (ieee80211_auth(sdata)) {
66e67e41 3872 u8 bssid[ETH_ALEN];
a9409093
EG		 3873 struct ieee80211_event event = {
3874 .type = MLME_EVENT,
3875 .u.mlme.data = AUTH_EVENT,
3876 .u.mlme.status = MLME_TIMEOUT,
3877 };
66e67e41
JB		 3878
3879 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3880
3881 ieee80211_destroy_auth_data(sdata, false);
3882
6ff57cf8 3883 cfg80211_auth_timeout(sdata->dev, bssid);
a9409093 3884 drv_event_callback(sdata->local, sdata, &event);
66e67e41 3885 }
89afe614 3886 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
8d61ffa5 3887 run_again(sdata, ifmgd->auth_data->timeout);
66e67e41 3888
89afe614 3889 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
66e67e41 3890 time_after(jiffies, ifmgd->assoc_data->timeout)) {
989c6505 3891 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
66e67e41 3892 ieee80211_do_assoc(sdata)) {
959867fa 3893 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
d0d1a12f
EG		 3894 struct ieee80211_event event = {
3895 .type = MLME_EVENT,
3896 .u.mlme.data = ASSOC_EVENT,
3897 .u.mlme.status = MLME_TIMEOUT,
3898 };
66e67e41
JB		 3899
3900 ieee80211_destroy_assoc_data(sdata, false);
959867fa 3901 cfg80211_assoc_timeout(sdata->dev, bss);
d0d1a12f 3902 drv_event_callback(sdata->local, sdata, &event);
66e67e41 3903 }
89afe614 3904 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
8d61ffa5 3905 run_again(sdata, ifmgd->assoc_data->timeout);
66e67e41 3906
392b9ffb 3907 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
b291ba11 3908 ifmgd->associated) {
a43abf29 3909 u8 bssid[ETH_ALEN];
72a8a3ed 3910 int max_tries;
a43abf29 3911
0c1ad2ca 3912 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 3913
30686bf7 3914 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
180205bd 3915 max_tries = max_nullfunc_tries;
72a8a3ed 3916 else
180205bd 3917 max_tries = max_probe_tries;
72a8a3ed 3918
4e5ff376
FF		 3919 /* ACK received for nullfunc probing frame */
3920 if (!ifmgd->probe_send_count)
3921 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 3922 else if (ifmgd->nullfunc_failed) {
3923 if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3924 mlme_dbg(sdata,
3925 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3926 bssid, ifmgd->probe_send_count,
3927 max_tries);
04ac3c0e
FF		 3928 ieee80211_mgd_probe_ap_send(sdata);
3929 } else {
bdcbd8e0
JB		 3930 mlme_dbg(sdata,
3931 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3932 bssid);
95acac61 3933 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1
JB		 3934 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3935 false);
04ac3c0e
FF		 3936 }
3937 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
8d61ffa5 3938 run_again(sdata, ifmgd->probe_timeout);
30686bf7 3939 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
bdcbd8e0
JB		 3940 mlme_dbg(sdata,
3941 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3942 bssid, probe_wait_ms);
95acac61 3943 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 3944 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
04ac3c0e 3945 } else if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3946 mlme_dbg(sdata,
3947 "No probe response from AP %pM after %dms, try %d/%i\n",
3948 bssid, probe_wait_ms,
3949 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 3950 ieee80211_mgd_probe_ap_send(sdata);
3951 } else {
b291ba11
JB		 3952 /*
3953 * We actually lost the connection ... or did we?
3954 * Let's make sure!
3955 */
b38afa87
BG		 3956 wiphy_debug(local->hw.wiphy,
3957 "%s: No probe response from AP %pM"
3958 " after %dms, disconnecting.\n",
3959 sdata->name,
180205bd 3960 bssid, probe_wait_ms);
04ac3c0e 3961
95acac61 3962 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 3963 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
b291ba11
JB		 3964 }
3965 }
3966
8d61ffa5 3967 sdata_unlock(sdata);
f0706e82
JB		 3968}
3969
b291ba11
JB		 3970static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3971{
3972 struct ieee80211_sub_if_data *sdata =
3973 (struct ieee80211_sub_if_data *) data;
0c21e632 3974 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 3975
0c21e632 3976 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
e5593f56
MK		 3977 return;
3978
682bd38b 3979 sdata->u.mgd.connection_loss = false;
1e4dcd01
JO		 3980 ieee80211_queue_work(&sdata->local->hw,
3981 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 3982}
3983
3984static void ieee80211_sta_conn_mon_timer(unsigned long data)
3985{
3986 struct ieee80211_sub_if_data *sdata =
3987 (struct ieee80211_sub_if_data *) data;
3988 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3989 struct ieee80211_local *local = sdata->local;
3990
0c21e632 3991 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
e5593f56
MK		 3992 return;
3993
42935eca 3994 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 3995}
3996
3997static void ieee80211_sta_monitor_work(struct work_struct *work)
3998{
3999 struct ieee80211_sub_if_data *sdata =
4000 container_of(work, struct ieee80211_sub_if_data,
4001 u.mgd.monitor_work);
4002
4003 ieee80211_mgd_probe_ap(sdata, false);
4004}
4005
9c6bd790
JB		 4006static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
4007{
ad935687 4008 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
925e64c3 4009 __ieee80211_stop_poll(sdata);
ad935687 4010
b291ba11 4011 /* let's probe the connection once */
30686bf7 4012 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
494f1fe5
EP		 4013 ieee80211_queue_work(&sdata->local->hw,
4014 &sdata->u.mgd.monitor_work);
b291ba11 4015 /* and do all the other regular work too */
64592c8f 4016 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 4017 }
9c6bd790 4018}
f0706e82 4019
b8360ab8 4020#ifdef CONFIG_PM
1a1cb744
JB		 4021void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
4022{
4023 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4024 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4025
4026 sdata_lock(sdata);
4027
c52666ae
EG		 4028 if (ifmgd->auth_data || ifmgd->assoc_data) {
4029 const u8 *bssid = ifmgd->auth_data ?
4030 ifmgd->auth_data->bss->bssid :
4031 ifmgd->assoc_data->bss->bssid;
4032
1a1cb744 4033 /*
c52666ae
EG		 4034 * If we are trying to authenticate / associate while suspending,
4035 * cfg80211 won't know and won't actually abort those attempts,
4036 * thus we need to do that ourselves.
1a1cb744 4037 */
c52666ae 4038 ieee80211_send_deauth_disassoc(sdata, bssid,
1a1cb744
JB		 4039 IEEE80211_STYPE_DEAUTH,
4040 WLAN_REASON_DEAUTH_LEAVING,
4041 false, frame_buf);
c52666ae
EG		 4042 if (ifmgd->assoc_data)
4043 ieee80211_destroy_assoc_data(sdata, false);
4044 if (ifmgd->auth_data)
4045 ieee80211_destroy_auth_data(sdata, false);
1a1cb744
JB		 4046 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4047 IEEE80211_DEAUTH_FRAME_LEN);
4048 }
4049
be72afe0
JB		 4050 /* This is a bit of a hack - we should find a better and more generic
4051 * solution to this. Normally when suspending, cfg80211 will in fact
4052 * deauthenticate. However, it doesn't (and cannot) stop an ongoing
4053 * auth (not so important) or assoc (this is the problem) process.
4054 *
4055 * As a consequence, it can happen that we are in the process of both
4056 * associating and suspending, and receive an association response
4057 * after cfg80211 has checked if it needs to disconnect, but before
4058 * we actually set the flag to drop incoming frames. This will then
4059 * cause the workqueue flush to process the association response in
4060 * the suspend, resulting in a successful association just before it
4061 * tries to remove the interface from the driver, which now though
4062 * has a channel context assigned ... this results in issues.
4063 *
4064 * To work around this (for now) simply deauth here again if we're
4065 * now connected.
4066 */
4067 if (ifmgd->associated && !sdata->local->wowlan) {
4068 u8 bssid[ETH_ALEN];
4069 struct cfg80211_deauth_request req = {
4070 .reason_code = WLAN_REASON_DEAUTH_LEAVING,
4071 .bssid = bssid,
4072 };
4073
4074 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4075 ieee80211_mgd_deauth(sdata, &req);
4076 }
4077
1a1cb744
JB		 4078 sdata_unlock(sdata);
4079}
4080
b8360ab8
JB		 4081void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
4082{
4083 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4084
8d61ffa5 4085 sdata_lock(sdata);
b8360ab8 4086 if (!ifmgd->associated) {
8d61ffa5 4087 sdata_unlock(sdata);
b8360ab8
JB		 4088 return;
4089 }
4090
4091 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
4092 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
4093 mlme_dbg(sdata, "driver requested disconnect after resume\n");
4094 ieee80211_sta_connection_lost(sdata,
4095 ifmgd->associated->bssid,
4096 WLAN_REASON_UNSPECIFIED,
4097 true);
8d61ffa5 4098 sdata_unlock(sdata);
b8360ab8
JB		 4099 return;
4100 }
8d61ffa5 4101 sdata_unlock(sdata);
b8360ab8
JB		 4102}
4103#endif
4104
9c6bd790
JB		 4105/* interface setup */
4106void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 4107{
46900298 4108 struct ieee80211_if_managed *ifmgd;
988c0f72 4109
46900298 4110 ifmgd = &sdata->u.mgd;
b291ba11 4111 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 4112 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 4113 INIT_WORK(&ifmgd->beacon_connection_loss_work,
4114 ieee80211_beacon_connection_loss_work);
882a7c69
JB		 4115 INIT_WORK(&ifmgd->csa_connection_drop_work,
4116 ieee80211_csa_connection_drop_work);
687da132 4117 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
81dd2b88
AN		 4118 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
4119 ieee80211_tdls_peer_del_work);
46900298 4120 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 4121 (unsigned long) sdata);
b291ba11
JB		 4122 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
4123 (unsigned long) sdata);
4124 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
4125 (unsigned long) sdata);
46900298 4126 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 4127 (unsigned long) sdata);
02219b3a
JB		 4128 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
4129 ieee80211_sta_handle_tspec_ac_params_wk);
9c6bd790 4130
ab1faead 4131 ifmgd->flags = 0;
1478acb3 4132 ifmgd->powersave = sdata->wdev.ps;
219c3867
AB		 4133 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
4134 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
67baf663 4135 ifmgd->p2p_noa_index = -1;
bbbdff9e 4136
0d8614b4 4137 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
0f78231b
JB		 4138 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
4139 else
4140 ifmgd->req_smps = IEEE80211_SMPS_OFF;
1277b4a9
LK		 4141
4142 /* Setup TDLS data */
4143 spin_lock_init(&ifmgd->teardown_lock);
4144 ifmgd->teardown_skb = NULL;
4145 ifmgd->orig_teardown_skb = NULL;
f0706e82
JB		 4146}
4147
77fdaa12
JB		 4148/* scan finished notification */
4149void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 4150{
31ee67a1 4151 struct ieee80211_sub_if_data *sdata;
60f8b39c 4152
77fdaa12
JB		 4153 /* Restart STA timers */
4154 rcu_read_lock();
370bd005
BG		 4155 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4156 if (ieee80211_sdata_running(sdata))
4157 ieee80211_restart_sta_timer(sdata);
4158 }
77fdaa12
JB		 4159 rcu_read_unlock();
4160}
60f8b39c 4161
f2d9d270
JB		 4162static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
4163 struct cfg80211_bss *cbss)
4164{
4165 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4166 const u8 *ht_cap_ie, *vht_cap_ie;
4167 const struct ieee80211_ht_cap *ht_cap;
4168 const struct ieee80211_vht_cap *vht_cap;
4169 u8 chains = 1;
4170
4171 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
4172 return chains;
4173
9caf0364 4174 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
f2d9d270
JB		 4175 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
4176 ht_cap = (void *)(ht_cap_ie + 2);
4177 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4178 /*
4179 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4180 * "Tx Unequal Modulation Supported" fields.
4181 */
4182 }
4183
4184 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
4185 return chains;
4186
9caf0364 4187 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
f2d9d270
JB		 4188 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
4189 u8 nss;
4190 u16 tx_mcs_map;
4191
4192 vht_cap = (void *)(vht_cap_ie + 2);
4193 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4194 for (nss = 8; nss > 0; nss--) {
4195 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4196 IEEE80211_VHT_MCS_NOT_SUPPORTED)
4197 break;
4198 }
4199 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4200 chains = max(chains, nss);
4201 }
4202
4203 return chains;
4204}
4205
b17166a7
JB		 4206static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4207 struct cfg80211_bss *cbss)
a1cf775d
JB		 4208{
4209 struct ieee80211_local *local = sdata->local;
4210 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
53b954ee 4211 const struct ieee80211_ht_cap *ht_cap = NULL;
24398e39 4212 const struct ieee80211_ht_operation *ht_oper = NULL;
f2d9d270 4213 const struct ieee80211_vht_operation *vht_oper = NULL;
24398e39 4214 struct ieee80211_supported_band *sband;
4bf88530 4215 struct cfg80211_chan_def chandef;
f2d9d270 4216 int ret;
52a45f38
AN		 4217 u32 i;
4218 bool have_80mhz;
a1cf775d 4219
24398e39
JB		 4220 sband = local->hw.wiphy->bands[cbss->channel->band];
4221
f2d9d270
JB		 4222 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
4223 IEEE80211_STA_DISABLE_80P80MHZ |
4224 IEEE80211_STA_DISABLE_160MHZ);
4225
9caf0364
JB		 4226 rcu_read_lock();
4227
f2d9d270
JB		 4228 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
4229 sband->ht_cap.ht_supported) {
53b954ee 4230 const u8 *ht_oper_ie, *ht_cap_ie;
24398e39 4231
9caf0364 4232 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
24398e39
JB		 4233 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
4234 ht_oper = (void *)(ht_oper_ie + 2);
08e6effa 4235
53b954ee
EP		 4236 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4237 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
4238 ht_cap = (void *)(ht_cap_ie + 2);
4239
4240 if (!ht_cap) {
08e6effa
JB		 4241 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4242 ht_oper = NULL;
4243 }
24398e39
JB		 4244 }
4245
f2d9d270
JB		 4246 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4247 sband->vht_cap.vht_supported) {
08e6effa 4248 const u8 *vht_oper_ie, *vht_cap;
f2d9d270 4249
9caf0364
JB		 4250 vht_oper_ie = ieee80211_bss_get_ie(cbss,
4251 WLAN_EID_VHT_OPERATION);
f2d9d270
JB		 4252 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
4253 vht_oper = (void *)(vht_oper_ie + 2);
4254 if (vht_oper && !ht_oper) {
4255 vht_oper = NULL;
bdcbd8e0 4256 sdata_info(sdata,
f2d9d270 4257 "AP advertised VHT without HT, disabling both\n");
cb145022
JB		 4258 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4259 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
24398e39 4260 }
08e6effa
JB		 4261
4262 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4263 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
4264 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4265 vht_oper = NULL;
4266 }
24398e39
JB		 4267 }
4268
52a45f38
AN		 4269 /* Allow VHT if at least one channel on the sband supports 80 MHz */
4270 have_80mhz = false;
4271 for (i = 0; i < sband->n_channels; i++) {
4272 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
4273 IEEE80211_CHAN_NO_80MHZ))
4274 continue;
4275
4276 have_80mhz = true;
4277 break;
4278 }
4279
4280 if (!have_80mhz)
4281 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4282
f2d9d270
JB		 4283 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
4284 cbss->channel,
53b954ee 4285 ht_cap, ht_oper, vht_oper,
5cdaed1e 4286 &chandef, false);
04ecd257 4287
f2d9d270
JB		 4288 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
4289 local->rx_chains);
24398e39 4290
9caf0364
JB		 4291 rcu_read_unlock();
4292
04ecd257
JB		 4293 /* will change later if needed */
4294 sdata->smps_mode = IEEE80211_SMPS_OFF;
4295
34a3740d 4296 mutex_lock(&local->mtx);
f2d9d270
JB		 4297 /*
4298 * If this fails (possibly due to channel context sharing
4299 * on incompatible channels, e.g. 80+80 and 160 sharing the
4300 * same control channel) try to use a smaller bandwidth.
4301 */
4302 ret = ieee80211_vif_use_channel(sdata, &chandef,
4303 IEEE80211_CHANCTX_SHARED);
0418a445
SW		 4304
4305 /* don't downgrade for 5 and 10 MHz channels, though. */
4306 if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4307 chandef.width == NL80211_CHAN_WIDTH_10)
34a3740d 4308 goto out;
0418a445 4309
d601cd8d 4310 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
e6b7cde4 4311 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
d601cd8d
JB		 4312 ret = ieee80211_vif_use_channel(sdata, &chandef,
4313 IEEE80211_CHANCTX_SHARED);
4314 }
34a3740d
JB		 4315 out:
4316 mutex_unlock(&local->mtx);
f2d9d270 4317 return ret;
b17166a7
JB		 4318}
4319
4320static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
c1041f10
CRI		 4321 struct cfg80211_bss *cbss, bool assoc,
4322 bool override)
b17166a7
JB		 4323{
4324 struct ieee80211_local *local = sdata->local;
4325 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4326 struct ieee80211_bss *bss = (void *)cbss->priv;
4327 struct sta_info *new_sta = NULL;
179b8fc7 4328 struct ieee80211_supported_band *sband;
c1041f10 4329 bool have_sta = false;
b17166a7
JB		 4330 int err;
4331
179b8fc7
CRI		 4332 sband = local->hw.wiphy->bands[cbss->channel->band];
4333
b17166a7
JB		 4334 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
4335 return -EINVAL;
4336
4337 if (assoc) {
4338 rcu_read_lock();
4339 have_sta = sta_info_get(sdata, cbss->bssid);
4340 rcu_read_unlock();
4341 }
4342
4343 if (!have_sta) {
4344 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4345 if (!new_sta)
4346 return -ENOMEM;
4347 }
179b8fc7 4348
c1041f10 4349 if (new_sta || override) {
179b8fc7
CRI		 4350 err = ieee80211_prep_channel(sdata, cbss);
4351 if (err) {
4352 if (new_sta)
4353 sta_info_free(local, new_sta);
4354 return -EINVAL;
4355 }
4356 }
4357
13e0c8e3 4358 if (new_sta) {
5d6a1b06
JB		 4359 u32 rates = 0, basic_rates = 0;
4360 bool have_higher_than_11mbit;
4361 int min_rate = INT_MAX, min_rate_index = -1;
2103dec1 4362 struct ieee80211_chanctx_conf *chanctx_conf;
8cef2c9d 4363 const struct cfg80211_bss_ies *ies;
179b8fc7 4364 int shift = ieee80211_vif_get_shift(&sdata->vif);
2103dec1 4365 u32 rate_flags;
b17166a7 4366
2103dec1
SW		 4367 rcu_read_lock();
4368 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4369 if (WARN_ON(!chanctx_conf)) {
4370 rcu_read_unlock();
c368ddaa 4371 sta_info_free(local, new_sta);
2103dec1
SW		 4372 return -EINVAL;
4373 }
4374 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
4375 rcu_read_unlock();
5d6a1b06 4376
5d6a1b06
JB		 4377 ieee80211_get_rates(sband, bss->supp_rates,
4378 bss->supp_rates_len,
4379 &rates, &basic_rates,
4380 &have_higher_than_11mbit,
2103dec1
SW		 4381 &min_rate, &min_rate_index,
4382 shift, rate_flags);
5d6a1b06
JB		 4383
4384 /*
4385 * This used to be a workaround for basic rates missing
4386 * in the association response frame. Now that we no
4387 * longer use the basic rates from there, it probably
4388 * doesn't happen any more, but keep the workaround so
4389 * in case some *other* APs are buggy in different ways
4390 * we can connect -- with a warning.
4391 */
4392 if (!basic_rates && min_rate_index >= 0) {
bdcbd8e0
JB		 4393 sdata_info(sdata,
4394 "No basic rates, using min rate instead\n");
5d6a1b06
JB		 4395 basic_rates = BIT(min_rate_index);
4396 }
4397
13e0c8e3 4398 new_sta->sta.supp_rates[cbss->channel->band] = rates;
5d6a1b06
JB		 4399 sdata->vif.bss_conf.basic_rates = basic_rates;
4400
4401 /* cf. IEEE 802.11 9.2.12 */
55de908a 4402 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
5d6a1b06
JB		 4403 have_higher_than_11mbit)
4404 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
4405 else
4406 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
4407
4408 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
4409
8c358bcd
JB		 4410 /* set timing information */
4411 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
8cef2c9d 4412 rcu_read_lock();
ef429dad
JB		 4413 ies = rcu_dereference(cbss->beacon_ies);
4414 if (ies) {
4415 const u8 *tim_ie;
4416
4417 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4418 sdata->vif.bss_conf.sync_device_ts =
4419 bss->device_ts_beacon;
4420 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4421 ies->data, ies->len);
4422 if (tim_ie && tim_ie[1] >= 2)
4423 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
4424 else
4425 sdata->vif.bss_conf.sync_dtim_count = 0;
30686bf7
JB		 4426 } else if (!ieee80211_hw_check(&sdata->local->hw,
4427 TIMING_BEACON_ONLY)) {
ef429dad
JB		 4428 ies = rcu_dereference(cbss->proberesp_ies);
4429 /* must be non-NULL since beacon IEs were NULL */
4430 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4431 sdata->vif.bss_conf.sync_device_ts =
4432 bss->device_ts_presp;
4433 sdata->vif.bss_conf.sync_dtim_count = 0;
4434 } else {
4435 sdata->vif.bss_conf.sync_tsf = 0;
4436 sdata->vif.bss_conf.sync_device_ts = 0;
4437 sdata->vif.bss_conf.sync_dtim_count = 0;
4438 }
8cef2c9d 4439 rcu_read_unlock();
8c358bcd
JB		 4440
4441 /* tell driver about BSSID, basic rates and timing */
5d6a1b06 4442 ieee80211_bss_info_change_notify(sdata,
8c358bcd
JB		 4443 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4444 BSS_CHANGED_BEACON_INT);
a1cf775d
JB		 4445
4446 if (assoc)
13e0c8e3 4447 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
a1cf775d 4448
13e0c8e3
JB		 4449 err = sta_info_insert(new_sta);
4450 new_sta = NULL;
a1cf775d 4451 if (err) {
bdcbd8e0
JB		 4452 sdata_info(sdata,
4453 "failed to insert STA entry for the AP (error %d)\n",
4454 err);
a1cf775d
JB		 4455 return err;
4456 }
4457 } else
b203ca39 4458 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
a1cf775d 4459
7d830a19
DS		 4460 /* Cancel scan to ensure that nothing interferes with connection */
4461 if (local->scanning)
4462 ieee80211_scan_cancel(local);
4463
a1cf775d
JB		 4464 return 0;
4465}
4466
77fdaa12
JB		 4467/* config hooks */
4468int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4469 struct cfg80211_auth_request *req)
9c6bd790 4470{
66e67e41
JB		 4471 struct ieee80211_local *local = sdata->local;
4472 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4473 struct ieee80211_mgd_auth_data *auth_data;
77fdaa12 4474 u16 auth_alg;
66e67e41
JB		 4475 int err;
4476
4477 /* prepare auth data structure */
9c6bd790 4478
77fdaa12
JB		 4479 switch (req->auth_type) {
4480 case NL80211_AUTHTYPE_OPEN_SYSTEM:
4481 auth_alg = WLAN_AUTH_OPEN;
4482 break;
4483 case NL80211_AUTHTYPE_SHARED_KEY:
66e67e41 4484 if (IS_ERR(local->wep_tx_tfm))
9dca9c49 4485 return -EOPNOTSUPP;
77fdaa12
JB		 4486 auth_alg = WLAN_AUTH_SHARED_KEY;
4487 break;
4488 case NL80211_AUTHTYPE_FT:
4489 auth_alg = WLAN_AUTH_FT;
4490 break;
4491 case NL80211_AUTHTYPE_NETWORK_EAP:
4492 auth_alg = WLAN_AUTH_LEAP;
4493 break;
6b8ece3a
JM		 4494 case NL80211_AUTHTYPE_SAE:
4495 auth_alg = WLAN_AUTH_SAE;
4496 break;
77fdaa12
JB		 4497 default:
4498 return -EOPNOTSUPP;
60f8b39c 4499 }
77fdaa12 4500
6b8ece3a
JM		 4501 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
4502 req->ie_len, GFP_KERNEL);
66e67e41 4503 if (!auth_data)
9c6bd790 4504 return -ENOMEM;
77fdaa12 4505
66e67e41 4506 auth_data->bss = req->bss;
77fdaa12 4507
6b8ece3a
JM		 4508 if (req->sae_data_len >= 4) {
4509 __le16 *pos = (__le16 *) req->sae_data;
4510 auth_data->sae_trans = le16_to_cpu(pos[0]);
4511 auth_data->sae_status = le16_to_cpu(pos[1]);
4512 memcpy(auth_data->data, req->sae_data + 4,
4513 req->sae_data_len - 4);
4514 auth_data->data_len += req->sae_data_len - 4;
4515 }
4516
77fdaa12 4517 if (req->ie && req->ie_len) {
6b8ece3a
JM		 4518 memcpy(&auth_data->data[auth_data->data_len],
4519 req->ie, req->ie_len);
4520 auth_data->data_len += req->ie_len;
9c6bd790 4521 }
77fdaa12 4522
fffd0934 4523 if (req->key && req->key_len) {
66e67e41
JB		 4524 auth_data->key_len = req->key_len;
4525 auth_data->key_idx = req->key_idx;
4526 memcpy(auth_data->key, req->key, req->key_len);
fffd0934
JB		 4527 }
4528
66e67e41 4529 auth_data->algorithm = auth_alg;
60f8b39c 4530
66e67e41 4531 /* try to authenticate/probe */
2a33bee2 4532
66e67e41
JB		 4533 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4534 ifmgd->assoc_data) {
4535 err = -EBUSY;
4536 goto err_free;
2a33bee2
GE		 4537 }
4538
66e67e41
JB		 4539 if (ifmgd->auth_data)
4540 ieee80211_destroy_auth_data(sdata, false);
2a33bee2 4541
66e67e41
JB		 4542 /* prep auth_data so we don't go into idle on disassoc */
4543 ifmgd->auth_data = auth_data;
af6b6374 4544
7b119dc0
JB		 4545 if (ifmgd->associated) {
4546 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4547
4548 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4549 WLAN_REASON_UNSPECIFIED,
4550 false, frame_buf);
4551
a90faa9d
EG		 4552 ieee80211_report_disconnect(sdata, frame_buf,
4553 sizeof(frame_buf), true,
4554 WLAN_REASON_UNSPECIFIED);
7b119dc0 4555 }
af6b6374 4556
bdcbd8e0 4557 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
e5b900d2 4558
c1041f10 4559 err = ieee80211_prep_connection(sdata, req->bss, false, false);
a1cf775d 4560 if (err)
66e67e41 4561 goto err_clear;
af6b6374 4562
46cad4b7 4563 err = ieee80211_auth(sdata);
66e67e41 4564 if (err) {
66e67e41
JB		 4565 sta_info_destroy_addr(sdata, req->bss->bssid);
4566 goto err_clear;
4567 }
4568
4569 /* hold our own reference */
5b112d3d 4570 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
8d61ffa5 4571 return 0;
66e67e41
JB		 4572
4573 err_clear:
c84a67a2 4574 eth_zero_addr(ifmgd->bssid);
3d2abdfd 4575 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41 4576 ifmgd->auth_data = NULL;
d01f858c
MK		 4577 mutex_lock(&sdata->local->mtx);
4578 ieee80211_vif_release_channel(sdata);
4579 mutex_unlock(&sdata->local->mtx);
66e67e41
JB		 4580 err_free:
4581 kfree(auth_data);
66e67e41 4582 return err;
af6b6374
JB		 4583}
4584
77fdaa12
JB		 4585int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4586 struct cfg80211_assoc_request *req)
f0706e82 4587{
66e67e41 4588 struct ieee80211_local *local = sdata->local;
77fdaa12 4589 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 4590 struct ieee80211_bss *bss = (void *)req->bss->priv;
66e67e41 4591 struct ieee80211_mgd_assoc_data *assoc_data;
c65dd147 4592 const struct cfg80211_bss_ies *beacon_ies;
4e74bfdb 4593 struct ieee80211_supported_band *sband;
b08fbbd8 4594 const u8 *ssidie, *ht_ie, *vht_ie;
2a33bee2 4595 int i, err;
c1041f10 4596 bool override = false;
f0706e82 4597
66e67e41
JB		 4598 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4599 if (!assoc_data)
4600 return -ENOMEM;
4601
9caf0364
JB		 4602 rcu_read_lock();
4603 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4604 if (!ssidie) {
4605 rcu_read_unlock();
4606 kfree(assoc_data);
4607 return -EINVAL;
4608 }
4609 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4610 assoc_data->ssid_len = ssidie[1];
4611 rcu_read_unlock();
4612
7b119dc0
JB		 4613 if (ifmgd->associated) {
4614 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4615
4616 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4617 WLAN_REASON_UNSPECIFIED,
4618 false, frame_buf);
4619
a90faa9d
EG		 4620 ieee80211_report_disconnect(sdata, frame_buf,
4621 sizeof(frame_buf), true,
4622 WLAN_REASON_UNSPECIFIED);
7b119dc0 4623 }
66e67e41
JB		 4624
4625 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4626 err = -EBUSY;
4627 goto err_free;
af6b6374 4628 }
77fdaa12 4629
66e67e41
JB		 4630 if (ifmgd->assoc_data) {
4631 err = -EBUSY;
4632 goto err_free;
4633 }
77fdaa12 4634
66e67e41
JB		 4635 if (ifmgd->auth_data) {
4636 bool match;
4637
4638 /* keep sta info, bssid if matching */
b203ca39 4639 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
66e67e41 4640 ieee80211_destroy_auth_data(sdata, match);
2a33bee2
GE		 4641 }
4642
66e67e41 4643 /* prepare assoc data */
095d81ce 4644
d8ec4433
JO		 4645 ifmgd->beacon_crc_valid = false;
4646
095d81ce
JB		 4647 assoc_data->wmm = bss->wmm_used &&
4648 (local->hw.queues >= IEEE80211_NUM_ACS);
095d81ce 4649
de5036aa
JB		 4650 /*
4651 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4652 * We still associate in non-HT mode (11a/b/g) if any one of these
4653 * ciphers is configured as pairwise.
4654 * We can set this to true for non-11n hardware, that'll be checked
4655 * separately along with the peer capabilities.
4656 */
1c4cb928 4657 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
77fdaa12
JB		 4658 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4659 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
1c4cb928 4660 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
a8243b72 4661 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
d545daba 4662 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
1c4cb928 4663 netdev_info(sdata->dev,
d545daba 4664 "disabling HT/VHT due to WEP/TKIP use\n");
1c4cb928
JB		 4665 }
4666 }
77fdaa12 4667
4e74bfdb
JB		 4668 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4669 sband = local->hw.wiphy->bands[req->bss->channel->band];
4670 if (!sband->ht_cap.ht_supported ||
095d81ce
JB		 4671 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4672 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
a8243b72 4673 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
095d81ce
JB		 4674 if (!bss->wmm_used &&
4675 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
1b49de26
JB		 4676 netdev_info(sdata->dev,
4677 "disabling HT as WMM/QoS is not supported by the AP\n");
1c4cb928 4678 }
4e74bfdb 4679
d545daba
MP		 4680 /* disable VHT if we don't support it or the AP doesn't use WMM */
4681 if (!sband->vht_cap.vht_supported ||
095d81ce
JB		 4682 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4683 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
d545daba 4684 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
095d81ce
JB		 4685 if (!bss->wmm_used &&
4686 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
1b49de26
JB		 4687 netdev_info(sdata->dev,
4688 "disabling VHT as WMM/QoS is not supported by the AP\n");
d545daba
MP		 4689 }
4690
ef96a842
BG		 4691 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4692 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4693 sizeof(ifmgd->ht_capa_mask));
4694
dd5ecfea
JB		 4695 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4696 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4697 sizeof(ifmgd->vht_capa_mask));
4698
77fdaa12 4699 if (req->ie && req->ie_len) {
66e67e41
JB		 4700 memcpy(assoc_data->ie, req->ie, req->ie_len);
4701 assoc_data->ie_len = req->ie_len;
4702 }
f679f65d 4703
66e67e41 4704 assoc_data->bss = req->bss;
f679f65d 4705
af6b6374
JB		 4706 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4707 if (ifmgd->powersave)
04ecd257 4708 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
af6b6374 4709 else
04ecd257 4710 sdata->smps_mode = IEEE80211_SMPS_OFF;
af6b6374 4711 } else
04ecd257 4712 sdata->smps_mode = ifmgd->req_smps;
af6b6374 4713
66e67e41 4714 assoc_data->capability = req->bss->capability;
66e67e41
JB		 4715 assoc_data->supp_rates = bss->supp_rates;
4716 assoc_data->supp_rates_len = bss->supp_rates_len;
9dde6423 4717
9caf0364 4718 rcu_read_lock();
9dde6423
JB		 4719 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4720 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4721 assoc_data->ap_ht_param =
4722 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4723 else
a8243b72 4724 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
b08fbbd8
JB		 4725 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4726 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4727 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4728 sizeof(struct ieee80211_vht_cap));
4729 else
4730 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
9caf0364 4731 rcu_read_unlock();
63f170e0 4732
848955cc 4733 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
30686bf7 4734 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK),
848955cc
JB		 4735 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
4736 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
4737
ab13315a 4738 if (bss->wmm_used && bss->uapsd_supported &&
848955cc 4739 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
76f0303d 4740 assoc_data->uapsd = true;
ab13315a
KV		 4741 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4742 } else {
76f0303d 4743 assoc_data->uapsd = false;
ab13315a
KV		 4744 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4745 }
4746
77fdaa12 4747 if (req->prev_bssid)
66e67e41 4748 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12
JB		 4749
4750 if (req->use_mfp) {
4751 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4752 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4753 } else {
4754 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4755 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4756 }
4757
cd2f5dd7
AK		 4758 if (req->flags & ASSOC_REQ_USE_RRM)
4759 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
4760 else
4761 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
4762
77fdaa12
JB		 4763 if (req->crypto.control_port)
4764 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4765 else
4766 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4767
a621fa4d
JB		 4768 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4769 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
2475b1cc
MS		 4770 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
4771 sdata->vif.type);
a621fa4d 4772
66e67e41
JB		 4773 /* kick off associate process */
4774
4775 ifmgd->assoc_data = assoc_data;
826262c3 4776 ifmgd->dtim_period = 0;
989c6505 4777 ifmgd->have_beacon = false;
66e67e41 4778
c1041f10
CRI		 4779 /* override HT/VHT configuration only if the AP and we support it */
4780 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
4781 struct ieee80211_sta_ht_cap sta_ht_cap;
4782
4783 if (req->flags & ASSOC_REQ_DISABLE_HT)
4784 override = true;
4785
4786 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
4787 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
4788
4789 /* check for 40 MHz disable override */
4790 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) &&
4791 sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
4792 !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
4793 override = true;
4794
4795 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4796 req->flags & ASSOC_REQ_DISABLE_VHT)
4797 override = true;
4798 }
4799
4800 if (req->flags & ASSOC_REQ_DISABLE_HT) {
4801 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4802 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4803 }
4804
4805 if (req->flags & ASSOC_REQ_DISABLE_VHT)
4806 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4807
4808 err = ieee80211_prep_connection(sdata, req->bss, true, override);
a1cf775d
JB		 4809 if (err)
4810 goto err_clear;
66e67e41 4811
c65dd147
EG		 4812 rcu_read_lock();
4813 beacon_ies = rcu_dereference(req->bss->beacon_ies);
826262c3 4814
30686bf7 4815 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) &&
c65dd147
EG		 4816 !beacon_ies) {
4817 /*
4818 * Wait up to one beacon interval ...
4819 * should this be more if we miss one?
4820 */
4821 sdata_info(sdata, "waiting for beacon from %pM\n",
4822 ifmgd->bssid);
4823 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
89afe614 4824 assoc_data->timeout_started = true;
c65dd147
EG		 4825 assoc_data->need_beacon = true;
4826 } else if (beacon_ies) {
4827 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4828 beacon_ies->data,
4829 beacon_ies->len);
ef429dad
JB		 4830 u8 dtim_count = 0;
4831
c65dd147
EG		 4832 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4833 const struct ieee80211_tim_ie *tim;
4834 tim = (void *)(tim_ie + 2);
4835 ifmgd->dtim_period = tim->dtim_period;
ef429dad 4836 dtim_count = tim->dtim_count;
826262c3 4837 }
989c6505 4838 ifmgd->have_beacon = true;
66e67e41 4839 assoc_data->timeout = jiffies;
89afe614 4840 assoc_data->timeout_started = true;
ef429dad 4841
30686bf7 4842 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
ef429dad
JB		 4843 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4844 sdata->vif.bss_conf.sync_device_ts =
4845 bss->device_ts_beacon;
4846 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4847 }
c65dd147
EG		 4848 } else {
4849 assoc_data->timeout = jiffies;
89afe614 4850 assoc_data->timeout_started = true;
66e67e41 4851 }
c65dd147
EG		 4852 rcu_read_unlock();
4853
8d61ffa5 4854 run_again(sdata, assoc_data->timeout);
66e67e41 4855
fcff4f10
PS		 4856 if (bss->corrupt_data) {
4857 char *corrupt_type = "data";
4858 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4859 if (bss->corrupt_data &
4860 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4861 corrupt_type = "beacon and probe response";
4862 else
4863 corrupt_type = "beacon";
4864 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4865 corrupt_type = "probe response";
bdcbd8e0
JB		 4866 sdata_info(sdata, "associating with AP with corrupt %s\n",
4867 corrupt_type);
fcff4f10
PS		 4868 }
4869
8d61ffa5 4870 return 0;
66e67e41 4871 err_clear:
c84a67a2 4872 eth_zero_addr(ifmgd->bssid);
3d2abdfd 4873 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 4874 ifmgd->assoc_data = NULL;
4875 err_free:
4876 kfree(assoc_data);
66e67e41 4877 return err;
f0706e82
JB		 4878}
4879
77fdaa12 4880int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
63c9c5e7 4881 struct cfg80211_deauth_request *req)
f0706e82 4882{
46900298 4883 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 4884 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
6863255b 4885 bool tx = !req->local_state_change;
f0706e82 4886
c9c3a060
JB		 4887 if (ifmgd->auth_data &&
4888 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
4889 sdata_info(sdata,
4890 "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
4891 req->bssid, req->reason_code,
4892 ieee80211_get_reason_code_string(req->reason_code));
0ff71613 4893
8c7d857c 4894 drv_mgd_prepare_tx(sdata->local, sdata);
37ad3888
JB		 4895 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4896 IEEE80211_STYPE_DEAUTH,
6863255b 4897 req->reason_code, tx,
37ad3888 4898 frame_buf);
86552017 4899 ieee80211_destroy_auth_data(sdata, false);
a90faa9d
EG		 4900 ieee80211_report_disconnect(sdata, frame_buf,
4901 sizeof(frame_buf), true,
4902 req->reason_code);
86552017 4903
c9c3a060 4904 return 0;
8c7d857c
EG		 4905 }
4906
a64cba3c
AO		 4907 if (ifmgd->assoc_data &&
4908 ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) {
4909 sdata_info(sdata,
4910 "aborting association with %pM by local choice (Reason: %u=%s)\n",
4911 req->bssid, req->reason_code,
4912 ieee80211_get_reason_code_string(req->reason_code));
4913
4914 drv_mgd_prepare_tx(sdata->local, sdata);
4915 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4916 IEEE80211_STYPE_DEAUTH,
4917 req->reason_code, tx,
4918 frame_buf);
4919 ieee80211_destroy_assoc_data(sdata, false);
4920 ieee80211_report_disconnect(sdata, frame_buf,
4921 sizeof(frame_buf), true,
4922 req->reason_code);
4923 return 0;
4924 }
4925
86552017
JB		 4926 if (ifmgd->associated &&
4927 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
c9c3a060
JB		 4928 sdata_info(sdata,
4929 "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
4930 req->bssid, req->reason_code,
4931 ieee80211_get_reason_code_string(req->reason_code));
4932
86552017
JB		 4933 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4934 req->reason_code, tx, frame_buf);
a90faa9d
EG		 4935 ieee80211_report_disconnect(sdata, frame_buf,
4936 sizeof(frame_buf), true,
4937 req->reason_code);
c9c3a060
JB		 4938 return 0;
4939 }
86552017 4940
c9c3a060 4941 return -ENOTCONN;
f0706e82 4942}
84363e6e 4943
77fdaa12 4944int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 4945 struct cfg80211_disassoc_request *req)
9c6bd790 4946{
77fdaa12 4947 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 4948 u8 bssid[ETH_ALEN];
6ae16775 4949 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
9c6bd790 4950
8d8b261a
JB		 4951 /*
4952 * cfg80211 should catch this ... but it's racy since
4953 * we can receive a disassoc frame, process it, hand it
4954 * to cfg80211 while that's in a locked section already
4955 * trying to tell us that the user wants to disconnect.
4956 */
8d61ffa5 4957 if (ifmgd->associated != req->bss)
77fdaa12 4958 return -ENOLINK;
77fdaa12 4959
bdcbd8e0 4960 sdata_info(sdata,
dfa1ad29
CO		 4961 "disassociating from %pM by local choice (Reason: %u=%s)\n",
4962 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
0ff71613 4963
e69e95db 4964 memcpy(bssid, req->bss->bssid, ETH_ALEN);
37ad3888
JB		 4965 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4966 req->reason_code, !req->local_state_change,
4967 frame_buf);
10f644a4 4968
a90faa9d
EG		 4969 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
4970 req->reason_code);
bc83b681 4971
10f644a4
JB		 4972 return 0;
4973}
026331c4 4974
afa762f6 4975void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
54e4ffb2
JB		 4976{
4977 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4978
49921859
BG		 4979 /*
4980 * Make sure some work items will not run after this,
4981 * they will not do anything but might not have been
4982 * cancelled when disconnecting.
4983 */
4984 cancel_work_sync(&ifmgd->monitor_work);
4985 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
4986 cancel_work_sync(&ifmgd->request_smps_work);
4987 cancel_work_sync(&ifmgd->csa_connection_drop_work);
4988 cancel_work_sync(&ifmgd->chswitch_work);
81dd2b88 4989 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
49921859 4990
8d61ffa5 4991 sdata_lock(sdata);
959867fa
JB		 4992 if (ifmgd->assoc_data) {
4993 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
54e4ffb2 4994 ieee80211_destroy_assoc_data(sdata, false);
959867fa
JB		 4995 cfg80211_assoc_timeout(sdata->dev, bss);
4996 }
54e4ffb2
JB		 4997 if (ifmgd->auth_data)
4998 ieee80211_destroy_auth_data(sdata, false);
1277b4a9
LK		 4999 spin_lock_bh(&ifmgd->teardown_lock);
5000 if (ifmgd->teardown_skb) {
5001 kfree_skb(ifmgd->teardown_skb);
5002 ifmgd->teardown_skb = NULL;
5003 ifmgd->orig_teardown_skb = NULL;
5004 }
5005 spin_unlock_bh(&ifmgd->teardown_lock);
54e4ffb2 5006 del_timer_sync(&ifmgd->timer);
8d61ffa5 5007 sdata_unlock(sdata);
54e4ffb2
JB		 5008}
5009
a97c13c3
JO		 5010void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
5011 enum nl80211_cqm_rssi_threshold_event rssi_event,
5012 gfp_t gfp)
5013{
5014 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5015
b5878a2d
JB		 5016 trace_api_cqm_rssi_notify(sdata, rssi_event);
5017
a97c13c3
JO		 5018 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
5019}
5020EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
98f03342
JB		 5021
5022void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
5023{
5024 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5025
5026 trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
5027
5028 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
5029}
5030EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);
Linux kernel - Deliverables
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