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mac80211: reprogram in interface order
[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)) {
cef2fc1c
JL		 1382 sdata_dbg(sdata,
1383 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1384 pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
1385 sdata->u.mgd.bssid);
c8d65917
SG		 1386 new_ap_level = pwr_level_80211h;
1387 } else { /* has_cisco_pwr is always true here. */
cef2fc1c
JL		 1388 sdata_dbg(sdata,
1389 "Limiting TX power to %d dBm as advertised by %pM\n",
1390 pwr_level_cisco, sdata->u.mgd.bssid);
c8d65917
SG		 1391 new_ap_level = pwr_level_cisco;
1392 }
04b7b2ff 1393
1ea6f9c0
JB		 1394 if (sdata->ap_power_level == new_ap_level)
1395 return 0;
04b7b2ff 1396
1ea6f9c0
JB		 1397 sdata->ap_power_level = new_ap_level;
1398 if (__ieee80211_recalc_txpower(sdata))
1399 return BSS_CHANGED_TXPOWER;
1400 return 0;
cc32abd4
JB		 1401}
1402
965bedad
JB		 1403/* powersave */
1404static void ieee80211_enable_ps(struct ieee80211_local *local,
1405 struct ieee80211_sub_if_data *sdata)
1406{
1407 struct ieee80211_conf *conf = &local->hw.conf;
1408
d5edaedc
JB		 1409 /*
1410 * If we are scanning right now then the parameters will
1411 * take effect when scan finishes.
1412 */
fbe9c429 1413 if (local->scanning)
d5edaedc
JB		 1414 return;
1415
965bedad 1416 if (conf->dynamic_ps_timeout > 0 &&
30686bf7 1417 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) {
965bedad
JB		 1418 mod_timer(&local->dynamic_ps_timer, jiffies +
1419 msecs_to_jiffies(conf->dynamic_ps_timeout));
1420 } else {
30686bf7 1421 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK))
076cdcb1 1422 ieee80211_send_nullfunc(local, sdata, true);
375177bf 1423
30686bf7
JB		 1424 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1425 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
2a13052f
JO		 1426 return;
1427
1428 conf->flags |= IEEE80211_CONF_PS;
1429 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965bedad
JB		 1430 }
1431}
1432
1433static void ieee80211_change_ps(struct ieee80211_local *local)
1434{
1435 struct ieee80211_conf *conf = &local->hw.conf;
1436
1437 if (local->ps_sdata) {
965bedad
JB		 1438 ieee80211_enable_ps(local, local->ps_sdata);
1439 } else if (conf->flags & IEEE80211_CONF_PS) {
1440 conf->flags &= ~IEEE80211_CONF_PS;
1441 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1442 del_timer_sync(&local->dynamic_ps_timer);
1443 cancel_work_sync(&local->dynamic_ps_enable_work);
1444 }
1445}
1446
808118cb
JY		 1447static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1448{
1449 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1450 struct sta_info *sta = NULL;
c2c98fde 1451 bool authorized = false;
808118cb
JY		 1452
1453 if (!mgd->powersave)
1454 return false;
1455
05cb9108
JB		 1456 if (mgd->broken_ap)
1457 return false;
1458
808118cb
JY		 1459 if (!mgd->associated)
1460 return false;
1461
392b9ffb 1462 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
808118cb
JY		 1463 return false;
1464
989c6505 1465 if (!mgd->have_beacon)
ce857888
AB		 1466 return false;
1467
808118cb
JY		 1468 rcu_read_lock();
1469 sta = sta_info_get(sdata, mgd->bssid);
1470 if (sta)
c2c98fde 1471 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
808118cb
JY		 1472 rcu_read_unlock();
1473
c2c98fde 1474 return authorized;
808118cb
JY		 1475}
1476
965bedad 1477/* need to hold RTNL or interface lock */
4a733ef1 1478void ieee80211_recalc_ps(struct ieee80211_local *local)
965bedad
JB		 1479{
1480 struct ieee80211_sub_if_data *sdata, *found = NULL;
1481 int count = 0;
195e294d 1482 int timeout;
965bedad 1483
30686bf7 1484 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) {
965bedad
JB		 1485 local->ps_sdata = NULL;
1486 return;
1487 }
1488
1489 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 1490 if (!ieee80211_sdata_running(sdata))
965bedad 1491 continue;
8c7914de
RM		 1492 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1493 /* If an AP vif is found, then disable PS
1494 * by setting the count to zero thereby setting
1495 * ps_sdata to NULL.
1496 */
1497 count = 0;
1498 break;
1499 }
965bedad
JB		 1500 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1501 continue;
1502 found = sdata;
1503 count++;
1504 }
1505
808118cb 1506 if (count == 1 && ieee80211_powersave_allowed(found)) {
4a733ef1 1507 u8 dtimper = found->u.mgd.dtim_period;
10f644a4
JB		 1508 s32 beaconint_us;
1509
10f644a4
JB		 1510 beaconint_us = ieee80211_tu_to_usec(
1511 found->vif.bss_conf.beacon_int);
1512
ff616381 1513 timeout = local->dynamic_ps_forced_timeout;
4a733ef1
JB		 1514 if (timeout < 0)
1515 timeout = 100;
09b85568 1516 local->hw.conf.dynamic_ps_timeout = timeout;
195e294d 1517
4a733ef1
JB		 1518 /* If the TIM IE is invalid, pretend the value is 1 */
1519 if (!dtimper)
1520 dtimper = 1;
1521
1522 local->hw.conf.ps_dtim_period = dtimper;
1523 local->ps_sdata = found;
10f644a4 1524 } else {
965bedad 1525 local->ps_sdata = NULL;
10f644a4 1526 }
965bedad
JB		 1527
1528 ieee80211_change_ps(local);
1529}
1530
ab095877
EP		 1531void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1532{
1533 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1534
1535 if (sdata->vif.bss_conf.ps != ps_allowed) {
1536 sdata->vif.bss_conf.ps = ps_allowed;
1537 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1538 }
1539}
1540
965bedad
JB		 1541void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1542{
1543 struct ieee80211_local *local =
1544 container_of(work, struct ieee80211_local,
1545 dynamic_ps_disable_work);
1546
1547 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1548 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1549 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1550 }
1551
1552 ieee80211_wake_queues_by_reason(&local->hw,
445ea4e8 1553 IEEE80211_MAX_QUEUE_MAP,
cca07b00
LC		 1554 IEEE80211_QUEUE_STOP_REASON_PS,
1555 false);
965bedad
JB		 1556}
1557
1558void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1559{
1560 struct ieee80211_local *local =
1561 container_of(work, struct ieee80211_local,
1562 dynamic_ps_enable_work);
1563 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
5e34069c 1564 struct ieee80211_if_managed *ifmgd;
1ddc2867
RM		 1565 unsigned long flags;
1566 int q;
965bedad
JB		 1567
1568 /* can only happen when PS was just disabled anyway */
1569 if (!sdata)
1570 return;
1571
5e34069c
CL		 1572 ifmgd = &sdata->u.mgd;
1573
965bedad
JB		 1574 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1575 return;
1576
09b85568 1577 if (local->hw.conf.dynamic_ps_timeout > 0) {
77b7023a
AN		 1578 /* don't enter PS if TX frames are pending */
1579 if (drv_tx_frames_pending(local)) {
1ddc2867
RM		 1580 mod_timer(&local->dynamic_ps_timer, jiffies +
1581 msecs_to_jiffies(
1582 local->hw.conf.dynamic_ps_timeout));
1583 return;
1584 }
77b7023a
AN		 1585
1586 /*
1587 * transmission can be stopped by others which leads to
1588 * dynamic_ps_timer expiry. Postpone the ps timer if it
1589 * is not the actual idle state.
1590 */
1591 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1592 for (q = 0; q < local->hw.queues; q++) {
1593 if (local->queue_stop_reasons[q]) {
1594 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1595 flags);
1596 mod_timer(&local->dynamic_ps_timer, jiffies +
1597 msecs_to_jiffies(
1598 local->hw.conf.dynamic_ps_timeout));
1599 return;
1600 }
1601 }
1602 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1ddc2867 1603 }
1ddc2867 1604
30686bf7 1605 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
9c38a8b4 1606 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
a1598383 1607 if (drv_tx_frames_pending(local)) {
e8306f98
VN		 1608 mod_timer(&local->dynamic_ps_timer, jiffies +
1609 msecs_to_jiffies(
1610 local->hw.conf.dynamic_ps_timeout));
a1598383 1611 } else {
076cdcb1 1612 ieee80211_send_nullfunc(local, sdata, true);
e8306f98 1613 /* Flush to get the tx status of nullfunc frame */
3b24f4c6 1614 ieee80211_flush_queues(local, sdata, false);
e8306f98 1615 }
f3e85b9e
VN		 1616 }
1617
30686bf7
JB		 1618 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
1619 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) ||
375177bf
VN		 1620 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1621 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1622 local->hw.conf.flags |= IEEE80211_CONF_PS;
1623 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1624 }
965bedad
JB		 1625}
1626
1627void ieee80211_dynamic_ps_timer(unsigned long data)
1628{
1629 struct ieee80211_local *local = (void *) data;
1630
42935eca 1631 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 1632}
1633
164eb02d
SW		 1634void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1635{
1636 struct delayed_work *delayed_work =
1637 container_of(work, struct delayed_work, work);
1638 struct ieee80211_sub_if_data *sdata =
1639 container_of(delayed_work, struct ieee80211_sub_if_data,
1640 dfs_cac_timer_work);
d2859df5 1641 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
164eb02d 1642
34a3740d
JB		 1643 mutex_lock(&sdata->local->mtx);
1644 if (sdata->wdev.cac_started) {
1645 ieee80211_vif_release_channel(sdata);
1646 cfg80211_cac_event(sdata->dev, &chandef,
1647 NL80211_RADAR_CAC_FINISHED,
1648 GFP_KERNEL);
1649 }
1650 mutex_unlock(&sdata->local->mtx);
164eb02d
SW		 1651}
1652
02219b3a
JB		 1653static bool
1654__ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1655{
1656 struct ieee80211_local *local = sdata->local;
1657 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
cc72f6e2 1658 bool ret = false;
02219b3a
JB		 1659 int ac;
1660
1661 if (local->hw.queues < IEEE80211_NUM_ACS)
1662 return false;
1663
1664 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1665 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
1666 int non_acm_ac;
1667 unsigned long now = jiffies;
1668
1669 if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
1670 tx_tspec->admitted_time &&
1671 time_after(now, tx_tspec->time_slice_start + HZ)) {
1672 tx_tspec->consumed_tx_time = 0;
1673 tx_tspec->time_slice_start = now;
1674
1675 if (tx_tspec->downgraded)
1676 tx_tspec->action =
1677 TX_TSPEC_ACTION_STOP_DOWNGRADE;
1678 }
1679
1680 switch (tx_tspec->action) {
1681 case TX_TSPEC_ACTION_STOP_DOWNGRADE:
1682 /* take the original parameters */
1683 if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac]))
1684 sdata_err(sdata,
1685 "failed to set TX queue parameters for queue %d\n",
1686 ac);
1687 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1688 tx_tspec->downgraded = false;
1689 ret = true;
1690 break;
1691 case TX_TSPEC_ACTION_DOWNGRADE:
1692 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
1693 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1694 ret = true;
1695 break;
1696 }
1697 /* downgrade next lower non-ACM AC */
1698 for (non_acm_ac = ac + 1;
1699 non_acm_ac < IEEE80211_NUM_ACS;
1700 non_acm_ac++)
1701 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
1702 break;
1703 /* The loop will result in using BK even if it requires
1704 * admission control, such configuration makes no sense
1705 * and we have to transmit somehow - the AC selection
1706 * does the same thing.
1707 */
1708 if (drv_conf_tx(local, sdata, ac,
1709 &sdata->tx_conf[non_acm_ac]))
1710 sdata_err(sdata,
1711 "failed to set TX queue parameters for queue %d\n",
1712 ac);
1713 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1714 ret = true;
1715 schedule_delayed_work(&ifmgd->tx_tspec_wk,
1716 tx_tspec->time_slice_start + HZ - now + 1);
1717 break;
1718 case TX_TSPEC_ACTION_NONE:
1719 /* nothing now */
1720 break;
1721 }
1722 }
1723
1724 return ret;
1725}
1726
1727void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1728{
1729 if (__ieee80211_sta_handle_tspec_ac_params(sdata))
1730 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1731}
1732
1733static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
1734{
1735 struct ieee80211_sub_if_data *sdata;
1736
1737 sdata = container_of(work, struct ieee80211_sub_if_data,
1738 u.mgd.tx_tspec_wk.work);
1739 ieee80211_sta_handle_tspec_ac_params(sdata);
1740}
1741
60f8b39c 1742/* MLME */
7d25745d 1743static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
4ced3f74 1744 struct ieee80211_sub_if_data *sdata,
4a3cb702 1745 const u8 *wmm_param, size_t wmm_param_len)
f0706e82 1746{
2ed77ea6 1747 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS];
4ced3f74 1748 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82 1749 size_t left;
2ed77ea6 1750 int count, ac;
4a3cb702
JB		 1751 const u8 *pos;
1752 u8 uapsd_queues = 0;
f0706e82 1753
e1b3ec1a 1754 if (!local->ops->conf_tx)
7d25745d 1755 return false;
e1b3ec1a 1756
32c5057b 1757 if (local->hw.queues < IEEE80211_NUM_ACS)
7d25745d 1758 return false;
3434fbd3
JB		 1759
1760 if (!wmm_param)
7d25745d 1761 return false;
3434fbd3 1762
f0706e82 1763 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
7d25745d 1764 return false;
ab13315a
KV		 1765
1766 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
dc41e4d4 1767 uapsd_queues = ifmgd->uapsd_queues;
ab13315a 1768
f0706e82 1769 count = wmm_param[6] & 0x0f;
46900298 1770 if (count == ifmgd->wmm_last_param_set)
7d25745d 1771 return false;
46900298 1772 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 1773
1774 pos = wmm_param + 8;
1775 left = wmm_param_len - 8;
1776
1777 memset(&params, 0, sizeof(params));
1778
00e96dec 1779 sdata->wmm_acm = 0;
f0706e82
JB		 1780 for (; left >= 4; left -= 4, pos += 4) {
1781 int aci = (pos[0] >> 5) & 0x03;
1782 int acm = (pos[0] >> 4) & 0x01;
ab13315a 1783 bool uapsd = false;
f0706e82
JB		 1784
1785 switch (aci) {
0eeb59fe 1786 case 1: /* AC_BK */
2ed77ea6 1787 ac = IEEE80211_AC_BK;
988c0f72 1788 if (acm)
00e96dec 1789 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV		 1790 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1791 uapsd = true;
f0706e82 1792 break;
0eeb59fe 1793 case 2: /* AC_VI */
2ed77ea6 1794 ac = IEEE80211_AC_VI;
988c0f72 1795 if (acm)
00e96dec 1796 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV		 1797 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1798 uapsd = true;
f0706e82 1799 break;
0eeb59fe 1800 case 3: /* AC_VO */
2ed77ea6 1801 ac = IEEE80211_AC_VO;
988c0f72 1802 if (acm)
00e96dec 1803 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV		 1804 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1805 uapsd = true;
f0706e82 1806 break;
0eeb59fe 1807 case 0: /* AC_BE */
f0706e82 1808 default:
2ed77ea6 1809 ac = IEEE80211_AC_BE;
988c0f72 1810 if (acm)
00e96dec 1811 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV		 1812 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1813 uapsd = true;
f0706e82
JB		 1814 break;
1815 }
1816
2ed77ea6 1817 params[ac].aifs = pos[0] & 0x0f;
730a7550 1818
2ed77ea6 1819 if (params[ac].aifs < 2) {
730a7550
EG		 1820 sdata_info(sdata,
1821 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n",
2ed77ea6
JB		 1822 params[ac].aifs, aci);
1823 params[ac].aifs = 2;
730a7550 1824 }
2ed77ea6
JB		 1825 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1826 params[ac].cw_min = ecw2cw(pos[1] & 0x0f);
1827 params[ac].txop = get_unaligned_le16(pos + 2);
1828 params[ac].acm = acm;
1829 params[ac].uapsd = uapsd;
ab13315a 1830
2ed77ea6
JB		 1831 if (params[ac].cw_min > params[ac].cw_max) {
1832 sdata_info(sdata,
1833 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n",
1834 params[ac].cw_min, params[ac].cw_max, aci);
1835 return false;
1836 }
1837 }
1838
1839 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
bdcbd8e0 1840 mlme_dbg(sdata,
2ed77ea6
JB		 1841 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
1842 ac, params[ac].acm,
1843 params[ac].aifs, params[ac].cw_min, params[ac].cw_max,
1844 params[ac].txop, params[ac].uapsd,
1845 ifmgd->tx_tspec[ac].downgraded);
1846 sdata->tx_conf[ac] = params[ac];
1847 if (!ifmgd->tx_tspec[ac].downgraded &&
1848 drv_conf_tx(local, sdata, ac, &params[ac]))
bdcbd8e0 1849 sdata_err(sdata,
2ed77ea6
JB		 1850 "failed to set TX queue parameters for AC %d\n",
1851 ac);
f0706e82 1852 }
e1b3ec1a
SG		 1853
1854 /* enable WMM or activate new settings */
4ced3f74 1855 sdata->vif.bss_conf.qos = true;
7d25745d 1856 return true;
f0706e82
JB		 1857}
1858
925e64c3
SG		 1859static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1860{
1861 lockdep_assert_held(&sdata->local->mtx);
1862
392b9ffb 1863 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
925e64c3
SG		 1864 ieee80211_run_deferred_scan(sdata->local);
1865}
1866
1867static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1868{
1869 mutex_lock(&sdata->local->mtx);
1870 __ieee80211_stop_poll(sdata);
1871 mutex_unlock(&sdata->local->mtx);
1872}
1873
7a5158ef
JB		 1874static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1875 u16 capab, bool erp_valid, u8 erp)
5628221c 1876{
bda3933a 1877 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 1878 u32 changed = 0;
7a5158ef
JB		 1879 bool use_protection;
1880 bool use_short_preamble;
1881 bool use_short_slot;
1882
1883 if (erp_valid) {
1884 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1885 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1886 } else {
1887 use_protection = false;
1888 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1889 }
1890
1891 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
55de908a 1892 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
43d35343 1893 use_short_slot = true;
5628221c 1894
471b3efd 1895 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 1896 bss_conf->use_cts_prot = use_protection;
1897 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 1898 }
7e9ed188 1899
d43c7b37 1900 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 1901 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 1902 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 1903 }
d9430a32 1904
7a5158ef 1905 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 1906 bss_conf->use_short_slot = use_short_slot;
1907 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 1908 }
1909
1910 return changed;
1911}
1912
f698d856 1913static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 1914 struct cfg80211_bss *cbss,
ae5eb026 1915 u32 bss_info_changed)
f0706e82 1916{
0c1ad2ca 1917 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 1918 struct ieee80211_local *local = sdata->local;
68542962 1919 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
d6f2da5b 1920
ae5eb026 1921 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 1922 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
50ae34a2 1923 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 1924
7ccc8bd7 1925 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
59c1ec2b 1926 beacon_loss_count * bss_conf->beacon_int));
7ccc8bd7 1927
0c1ad2ca
JB		 1928 sdata->u.mgd.associated = cbss;
1929 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 1930
17e4ec14
JM		 1931 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1932
488dd7b5 1933 if (sdata->vif.p2p) {
9caf0364 1934 const struct cfg80211_bss_ies *ies;
488dd7b5 1935
9caf0364
JB		 1936 rcu_read_lock();
1937 ies = rcu_dereference(cbss->ies);
1938 if (ies) {
9caf0364
JB		 1939 int ret;
1940
1941 ret = cfg80211_get_p2p_attr(
1942 ies->data, ies->len,
1943 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
67baf663
JD		 1944 (u8 *) &bss_conf->p2p_noa_attr,
1945 sizeof(bss_conf->p2p_noa_attr));
9caf0364 1946 if (ret >= 2) {
67baf663
JD		 1947 sdata->u.mgd.p2p_noa_index =
1948 bss_conf->p2p_noa_attr.index;
9caf0364 1949 bss_info_changed |= BSS_CHANGED_P2P_PS;
9caf0364 1950 }
488dd7b5 1951 }
9caf0364 1952 rcu_read_unlock();
488dd7b5
JB		 1953 }
1954
b291ba11 1955 /* just to be sure */
925e64c3 1956 ieee80211_stop_poll(sdata);
b291ba11 1957
9ac19a90 1958 ieee80211_led_assoc(local, 1);
9306102e 1959
989c6505 1960 if (sdata->u.mgd.have_beacon) {
826262c3
JB		 1961 /*
1962 * If the AP is buggy we may get here with no DTIM period
1963 * known, so assume it's 1 which is the only safe assumption
1964 * in that case, although if the TIM IE is broken powersave
1965 * probably just won't work at all.
1966 */
1967 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
817cee76 1968 bss_conf->beacon_rate = bss->beacon_rate;
989c6505 1969 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
826262c3 1970 } else {
817cee76 1971 bss_conf->beacon_rate = NULL;
e5b900d2 1972 bss_conf->dtim_period = 0;
826262c3 1973 }
e5b900d2 1974
68542962 1975 bss_conf->assoc = 1;
9cef8737 1976
a97c13c3 1977 /* Tell the driver to monitor connection quality (if supported) */
ea086359 1978 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
68542962 1979 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 1980 bss_info_changed |= BSS_CHANGED_CQM;
1981
68542962 1982 /* Enable ARP filtering */
0f19b41e 1983 if (bss_conf->arp_addr_cnt)
68542962 1984 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
68542962 1985
ae5eb026 1986 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 1987
056508dc 1988 mutex_lock(&local->iflist_mtx);
4a733ef1 1989 ieee80211_recalc_ps(local);
056508dc 1990 mutex_unlock(&local->iflist_mtx);
e0cb686f 1991
04ecd257 1992 ieee80211_recalc_smps(sdata);
ab095877
EP		 1993 ieee80211_recalc_ps_vif(sdata);
1994
9ac19a90 1995 netif_carrier_on(sdata->dev);
f0706e82
JB		 1996}
1997
e69e95db 1998static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
37ad3888
JB		 1999 u16 stype, u16 reason, bool tx,
2000 u8 *frame_buf)
aa458d17 2001{
46900298 2002 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17 2003 struct ieee80211_local *local = sdata->local;
3cc5240b 2004 u32 changed = 0;
aa458d17 2005
8d61ffa5 2006 sdata_assert_lock(sdata);
77fdaa12 2007
37ad3888
JB		 2008 if (WARN_ON_ONCE(tx && !frame_buf))
2009 return;
2010
b291ba11
JB		 2011 if (WARN_ON(!ifmgd->associated))
2012 return;
2013
79543d8e
DS		 2014 ieee80211_stop_poll(sdata);
2015
77fdaa12 2016 ifmgd->associated = NULL;
aa458d17
TW		 2017 netif_carrier_off(sdata->dev);
2018
88bc40e8
EP		 2019 /*
2020 * if we want to get out of ps before disassoc (why?) we have
2021 * to do it before sending disassoc, as otherwise the null-packet
2022 * won't be valid.
2023 */
2024 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2025 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2026 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2027 }
2028 local->ps_sdata = NULL;
2029
ab095877
EP		 2030 /* disable per-vif ps */
2031 ieee80211_recalc_ps_vif(sdata);
2032
14f2ae83
EG		 2033 /* make sure ongoing transmission finishes */
2034 synchronize_net();
2035
3b24f4c6
EG		 2036 /*
2037 * drop any frame before deauth/disassoc, this can be data or
2038 * management frame. Since we are disconnecting, we should not
2039 * insist sending these frames which can take time and delay
2040 * the disconnection and possible the roaming.
2041 */
f823981e 2042 if (tx)
3b24f4c6 2043 ieee80211_flush_queues(local, sdata, true);
f823981e 2044
37ad3888
JB		 2045 /* deauthenticate/disassociate now */
2046 if (tx || frame_buf)
88a9e31c
EP		 2047 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
2048 reason, tx, frame_buf);
37ad3888 2049
3b24f4c6 2050 /* flush out frame - make sure the deauth was actually sent */
37ad3888 2051 if (tx)
3b24f4c6 2052 ieee80211_flush_queues(local, sdata, false);
37ad3888 2053
88a9e31c 2054 /* clear bssid only after building the needed mgmt frames */
c84a67a2 2055 eth_zero_addr(ifmgd->bssid);
88a9e31c 2056
37ad3888 2057 /* remove AP and TDLS peers */
d34ba216 2058 sta_info_flush(sdata);
37ad3888
JB		 2059
2060 /* finally reset all BSS / config parameters */
f5e5bf25
TW		 2061 changed |= ieee80211_reset_erp_info(sdata);
2062
f5e5bf25 2063 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 2064 changed |= BSS_CHANGED_ASSOC;
2065 sdata->vif.bss_conf.assoc = false;
f5e5bf25 2066
67baf663
JD		 2067 ifmgd->p2p_noa_index = -1;
2068 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
2069 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
488dd7b5 2070
dd5ecfea 2071 /* on the next assoc, re-program HT/VHT parameters */
ef96a842
BG		 2072 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
2073 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
dd5ecfea
JB		 2074 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
2075 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
322cd406 2076 sdata->flags &= ~IEEE80211_SDATA_MU_MIMO_OWNER;
413ad50a 2077
1ea6f9c0 2078 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
a8302de9 2079
520eb820
KV		 2080 del_timer_sync(&local->dynamic_ps_timer);
2081 cancel_work_sync(&local->dynamic_ps_enable_work);
2082
68542962 2083 /* Disable ARP filtering */
0f19b41e 2084 if (sdata->vif.bss_conf.arp_addr_cnt)
68542962 2085 changed |= BSS_CHANGED_ARP_FILTER;
68542962 2086
3abead59
JB		 2087 sdata->vif.bss_conf.qos = false;
2088 changed |= BSS_CHANGED_QOS;
2089
0aaffa9b
JB		 2090 /* The BSSID (not really interesting) and HT changed */
2091 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 2092 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 2093
3abead59 2094 /* disassociated - set to defaults now */
cec66283 2095 ieee80211_set_wmm_default(sdata, false, false);
3abead59 2096
b9dcf712
JB		 2097 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
2098 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
2099 del_timer_sync(&sdata->u.mgd.timer);
2100 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2d9957cc 2101
826262c3 2102 sdata->vif.bss_conf.dtim_period = 0;
817cee76
AB		 2103 sdata->vif.bss_conf.beacon_rate = NULL;
2104
989c6505 2105 ifmgd->have_beacon = false;
826262c3 2106
028e8da0 2107 ifmgd->flags = 0;
34a3740d 2108 mutex_lock(&local->mtx);
028e8da0 2109 ieee80211_vif_release_channel(sdata);
59af6928
MK		 2110
2111 sdata->vif.csa_active = false;
0c21e632 2112 ifmgd->csa_waiting_bcn = false;
f84eaa10 2113 ifmgd->csa_ignored_same_chan = false;
a46992b4
LC		 2114 if (sdata->csa_block_tx) {
2115 ieee80211_wake_vif_queues(local, sdata,
2116 IEEE80211_QUEUE_STOP_REASON_CSA);
2117 sdata->csa_block_tx = false;
2118 }
34a3740d 2119 mutex_unlock(&local->mtx);
2475b1cc 2120
02219b3a
JB		 2121 /* existing TX TSPEC sessions no longer exist */
2122 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
2123 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
2124
2475b1cc 2125 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
aa458d17 2126}
f0706e82 2127
3cf335d5
KV		 2128void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
2129 struct ieee80211_hdr *hdr)
2130{
2131 /*
2132 * We can postpone the mgd.timer whenever receiving unicast frames
2133 * from AP because we know that the connection is working both ways
2134 * at that time. But multicast frames (and hence also beacons) must
2135 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 2136 * data idle periods for sending the periodic probe request to the
2137 * AP we're connected to.
3cf335d5 2138 */
b291ba11
JB		 2139 if (is_multicast_ether_addr(hdr->addr1))
2140 return;
2141
be099e82 2142 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 2143}
f0706e82 2144
4e5ff376
FF		 2145static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
2146{
2147 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
133d40f9 2148 struct ieee80211_local *local = sdata->local;
4e5ff376 2149
133d40f9 2150 mutex_lock(&local->mtx);
392b9ffb
SG		 2151 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
2152 goto out;
4e5ff376 2153
925e64c3 2154 __ieee80211_stop_poll(sdata);
133d40f9
SG		 2155
2156 mutex_lock(&local->iflist_mtx);
4a733ef1 2157 ieee80211_recalc_ps(local);
133d40f9 2158 mutex_unlock(&local->iflist_mtx);
4e5ff376 2159
30686bf7 2160 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
133d40f9 2161 goto out;
4e5ff376
FF		 2162
2163 /*
2164 * We've received a probe response, but are not sure whether
2165 * we have or will be receiving any beacons or data, so let's
2166 * schedule the timers again, just in case.
2167 */
2168 ieee80211_sta_reset_beacon_monitor(sdata);
2169
2170 mod_timer(&ifmgd->conn_mon_timer,
2171 round_jiffies_up(jiffies +
2172 IEEE80211_CONNECTION_IDLE_TIME));
133d40f9 2173out:
133d40f9 2174 mutex_unlock(&local->mtx);
4e5ff376
FF		 2175}
2176
02219b3a
JB		 2177static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
2178 struct ieee80211_hdr *hdr,
2179 u16 tx_time)
2180{
2181 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2182 u16 tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
2183 int ac = ieee80211_ac_from_tid(tid);
2184 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
2185 unsigned long now = jiffies;
2186
2187 if (likely(!tx_tspec->admitted_time))
2188 return;
2189
2190 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2191 tx_tspec->consumed_tx_time = 0;
2192 tx_tspec->time_slice_start = now;
2193
2194 if (tx_tspec->downgraded) {
2195 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
2196 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2197 }
2198 }
2199
2200 if (tx_tspec->downgraded)
2201 return;
2202
2203 tx_tspec->consumed_tx_time += tx_time;
2204
2205 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
2206 tx_tspec->downgraded = true;
2207 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
2208 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2209 }
2210}
2211
4e5ff376 2212void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
02219b3a 2213 struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
4e5ff376 2214{
02219b3a
JB		 2215 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
2216
75706d0e 2217 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF		 2218 return;
2219
4e5ff376
FF		 2220 if (ieee80211_is_nullfunc(hdr->frame_control) &&
2221 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e 2222 if (ack)
cab1c7fd 2223 ieee80211_sta_reset_conn_monitor(sdata);
04ac3c0e
FF		 2224 else
2225 sdata->u.mgd.nullfunc_failed = true;
4e5ff376 2226 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
cab1c7fd 2227 return;
4e5ff376 2228 }
cab1c7fd
WD		 2229
2230 if (ack)
2231 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF		 2232}
2233
a43abf29
ML		 2234static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2235{
2236 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2237 const u8 *ssid;
f01a067d 2238 u8 *dst = ifmgd->associated->bssid;
180205bd 2239 u8 unicast_limit = max(1, max_probe_tries - 3);
f01a067d
LR		 2240
2241 /*
2242 * Try sending broadcast probe requests for the last three
2243 * probe requests after the first ones failed since some
2244 * buggy APs only support broadcast probe requests.
2245 */
2246 if (ifmgd->probe_send_count >= unicast_limit)
2247 dst = NULL;
a43abf29 2248
4e5ff376
FF		 2249 /*
2250 * When the hardware reports an accurate Tx ACK status, it's
2251 * better to send a nullfunc frame instead of a probe request,
2252 * as it will kick us off the AP quickly if we aren't associated
2253 * anymore. The timeout will be reset if the frame is ACKed by
2254 * the AP.
2255 */
992e68bf
SD		 2256 ifmgd->probe_send_count++;
2257
30686bf7 2258 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) {
04ac3c0e 2259 ifmgd->nullfunc_failed = false;
076cdcb1 2260 ieee80211_send_nullfunc(sdata->local, sdata, false);
04ac3c0e 2261 } else {
88c868c4
SG		 2262 int ssid_len;
2263
9caf0364 2264 rcu_read_lock();
4e5ff376 2265 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
88c868c4
SG		 2266 if (WARN_ON_ONCE(ssid == NULL))
2267 ssid_len = 0;
2268 else
2269 ssid_len = ssid[1];
2270
a73f8e21 2271 ieee80211_send_probe_req(sdata, sdata->vif.addr, dst,
a344d677 2272 ssid + 2, ssid_len, NULL,
1672c0e3 2273 0, (u32) -1, true, 0,
55de908a 2274 ifmgd->associated->channel, false);
9caf0364 2275 rcu_read_unlock();
4e5ff376 2276 }
a43abf29 2277
180205bd 2278 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
8d61ffa5 2279 run_again(sdata, ifmgd->probe_timeout);
a43abf29
ML		 2280}
2281
b291ba11
JB		 2282static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2283 bool beacon)
04de8381 2284{
04de8381 2285 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 2286 bool already = false;
34bfc411 2287
9607e6b6 2288 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 2289 return;
2290
8d61ffa5 2291 sdata_lock(sdata);
77fdaa12
JB		 2292
2293 if (!ifmgd->associated)
2294 goto out;
2295
133d40f9
SG		 2296 mutex_lock(&sdata->local->mtx);
2297
2298 if (sdata->local->tmp_channel || sdata->local->scanning) {
2299 mutex_unlock(&sdata->local->mtx);
2300 goto out;
2301 }
2302
a13fbe54 2303 if (beacon) {
bdcbd8e0 2304 mlme_dbg_ratelimited(sdata,
59c1ec2b
BG		 2305 "detected beacon loss from AP (missed %d beacons) - probing\n",
2306 beacon_loss_count);
bdcbd8e0 2307
98f03342 2308 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
a13fbe54 2309 }
04de8381 2310
b291ba11
JB		 2311 /*
2312 * The driver/our work has already reported this event or the
2313 * connection monitoring has kicked in and we have already sent
2314 * a probe request. Or maybe the AP died and the driver keeps
2315 * reporting until we disassociate...
2316 *
2317 * In either case we have to ignore the current call to this
2318 * function (except for setting the correct probe reason bit)
2319 * because otherwise we would reset the timer every time and
2320 * never check whether we received a probe response!
2321 */
392b9ffb 2322 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
b291ba11
JB		 2323 already = true;
2324
12b5f34d
EP		 2325 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2326
133d40f9
SG		 2327 mutex_unlock(&sdata->local->mtx);
2328
b291ba11
JB		 2329 if (already)
2330 goto out;
2331
4e751843 2332 mutex_lock(&sdata->local->iflist_mtx);
4a733ef1 2333 ieee80211_recalc_ps(sdata->local);
4e751843
JB		 2334 mutex_unlock(&sdata->local->iflist_mtx);
2335
a43abf29
ML		 2336 ifmgd->probe_send_count = 0;
2337 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12 2338 out:
8d61ffa5 2339 sdata_unlock(sdata);
04de8381
KV		 2340}
2341
a619a4c0
JO		 2342struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2343 struct ieee80211_vif *vif)
2344{
2345 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2346 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d9b3b28b 2347 struct cfg80211_bss *cbss;
a619a4c0
JO		 2348 struct sk_buff *skb;
2349 const u8 *ssid;
88c868c4 2350 int ssid_len;
a619a4c0
JO		 2351
2352 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2353 return NULL;
2354
8d61ffa5 2355 sdata_assert_lock(sdata);
a619a4c0 2356
d9b3b28b
EP		 2357 if (ifmgd->associated)
2358 cbss = ifmgd->associated;
2359 else if (ifmgd->auth_data)
2360 cbss = ifmgd->auth_data->bss;
2361 else if (ifmgd->assoc_data)
2362 cbss = ifmgd->assoc_data->bss;
2363 else
a619a4c0
JO		 2364 return NULL;
2365
9caf0364 2366 rcu_read_lock();
d9b3b28b 2367 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
88c868c4
SG		 2368 if (WARN_ON_ONCE(ssid == NULL))
2369 ssid_len = 0;
2370 else
2371 ssid_len = ssid[1];
2372
a344d677 2373 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
55de908a 2374 (u32) -1, cbss->channel,
6b77863b 2375 ssid + 2, ssid_len,
85a237fe 2376 NULL, 0, true);
9caf0364 2377 rcu_read_unlock();
a619a4c0
JO		 2378
2379 return skb;
2380}
2381EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2382
a90faa9d
EG		 2383static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata,
2384 const u8 *buf, size_t len, bool tx,
2385 u16 reason)
2386{
2387 struct ieee80211_event event = {
2388 .type = MLME_EVENT,
2389 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT,
2390 .u.mlme.reason = reason,
2391 };
2392
2393 if (tx)
2394 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len);
2395 else
2396 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len);
2397
2398 drv_event_callback(sdata->local, sdata, &event);
2399}
2400
eef9e54c 2401static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
1e4dcd01 2402{
59af6928 2403 struct ieee80211_local *local = sdata->local;
1e4dcd01 2404 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 2405 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
1e4dcd01 2406
8d61ffa5 2407 sdata_lock(sdata);
1e4dcd01 2408 if (!ifmgd->associated) {
8d61ffa5 2409 sdata_unlock(sdata);
1e4dcd01
JO		 2410 return;
2411 }
2412
37ad3888
JB		 2413 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2414 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
eef9e54c 2415 true, frame_buf);
59af6928 2416 mutex_lock(&local->mtx);
7578d575 2417 sdata->vif.csa_active = false;
0c21e632 2418 ifmgd->csa_waiting_bcn = false;
a46992b4
LC		 2419 if (sdata->csa_block_tx) {
2420 ieee80211_wake_vif_queues(local, sdata,
2421 IEEE80211_QUEUE_STOP_REASON_CSA);
2422 sdata->csa_block_tx = false;
2423 }
59af6928 2424 mutex_unlock(&local->mtx);
7da7cc1d 2425
a90faa9d
EG		 2426 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
2427 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2428
8d61ffa5 2429 sdata_unlock(sdata);
1e4dcd01
JO		 2430}
2431
cc74c0c7 2432static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 2433{
2434 struct ieee80211_sub_if_data *sdata =
2435 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 2436 u.mgd.beacon_connection_loss_work);
a85e1d55 2437 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
a85e1d55 2438
976bd9ef
JB		 2439 if (ifmgd->associated)
2440 ifmgd->beacon_loss_count++;
b291ba11 2441
682bd38b 2442 if (ifmgd->connection_loss) {
882a7c69
JB		 2443 sdata_info(sdata, "Connection to AP %pM lost\n",
2444 ifmgd->bssid);
eef9e54c 2445 __ieee80211_disconnect(sdata);
882a7c69 2446 } else {
1e4dcd01 2447 ieee80211_mgd_probe_ap(sdata, true);
882a7c69
JB		 2448 }
2449}
2450
2451static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2452{
2453 struct ieee80211_sub_if_data *sdata =
2454 container_of(work, struct ieee80211_sub_if_data,
2455 u.mgd.csa_connection_drop_work);
2456
eef9e54c 2457 __ieee80211_disconnect(sdata);
b291ba11
JB		 2458}
2459
04de8381
KV		 2460void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2461{
2462 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 2463 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 2464
b5878a2d
JB		 2465 trace_api_beacon_loss(sdata);
2466
682bd38b 2467 sdata->u.mgd.connection_loss = false;
1e4dcd01 2468 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 2469}
2470EXPORT_SYMBOL(ieee80211_beacon_loss);
2471
1e4dcd01
JO		 2472void ieee80211_connection_loss(struct ieee80211_vif *vif)
2473{
2474 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2475 struct ieee80211_hw *hw = &sdata->local->hw;
2476
b5878a2d
JB		 2477 trace_api_connection_loss(sdata);
2478
682bd38b 2479 sdata->u.mgd.connection_loss = true;
1e4dcd01
JO		 2480 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2481}
2482EXPORT_SYMBOL(ieee80211_connection_loss);
2483
2484
66e67e41
JB		 2485static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2486 bool assoc)
2487{
2488 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2489
8d61ffa5 2490 sdata_assert_lock(sdata);
66e67e41 2491
66e67e41 2492 if (!assoc) {
c1e140bf
EG		 2493 /*
2494 * we are not authenticated yet, the only timer that could be
2495 * running is the timeout for the authentication response which
2496 * which is not relevant anymore.
2497 */
2498 del_timer_sync(&sdata->u.mgd.timer);
66e67e41
JB		 2499 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2500
c84a67a2 2501 eth_zero_addr(sdata->u.mgd.bssid);
66e67e41 2502 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
028e8da0 2503 sdata->u.mgd.flags = 0;
34a3740d 2504 mutex_lock(&sdata->local->mtx);
55de908a 2505 ieee80211_vif_release_channel(sdata);
34a3740d 2506 mutex_unlock(&sdata->local->mtx);
66e67e41
JB		 2507 }
2508
5b112d3d 2509 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
66e67e41
JB		 2510 kfree(auth_data);
2511 sdata->u.mgd.auth_data = NULL;
2512}
2513
c9c99f89
JB		 2514static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2515 bool assoc)
2516{
2517 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2518
2519 sdata_assert_lock(sdata);
2520
2521 if (!assoc) {
2522 /*
2523 * we are not associated yet, the only timer that could be
2524 * running is the timeout for the association response which
2525 * which is not relevant anymore.
2526 */
2527 del_timer_sync(&sdata->u.mgd.timer);
2528 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2529
2530 eth_zero_addr(sdata->u.mgd.bssid);
2531 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2532 sdata->u.mgd.flags = 0;
322cd406 2533 sdata->flags &= ~IEEE80211_SDATA_MU_MIMO_OWNER;
c9c99f89
JB		 2534 mutex_lock(&sdata->local->mtx);
2535 ieee80211_vif_release_channel(sdata);
2536 mutex_unlock(&sdata->local->mtx);
2537 }
2538
2539 kfree(assoc_data);
2540 sdata->u.mgd.assoc_data = NULL;
2541}
2542
66e67e41
JB		 2543static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2544 struct ieee80211_mgmt *mgmt, size_t len)
2545{
1672c0e3 2546 struct ieee80211_local *local = sdata->local;
66e67e41
JB		 2547 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2548 u8 *pos;
2549 struct ieee802_11_elems elems;
1672c0e3 2550 u32 tx_flags = 0;
66e67e41
JB		 2551
2552 pos = mgmt->u.auth.variable;
b2e506bf 2553 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
66e67e41
JB		 2554 if (!elems.challenge)
2555 return;
2556 auth_data->expected_transaction = 4;
a1845fc7 2557 drv_mgd_prepare_tx(sdata->local, sdata);
30686bf7 2558 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1672c0e3
JB		 2559 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2560 IEEE80211_TX_INTFL_MLME_CONN_TX;
700e8ea6 2561 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
66e67e41
JB		 2562 elems.challenge - 2, elems.challenge_len + 2,
2563 auth_data->bss->bssid, auth_data->bss->bssid,
2564 auth_data->key, auth_data->key_len,
1672c0e3 2565 auth_data->key_idx, tx_flags);
66e67e41
JB		 2566}
2567
8d61ffa5
JB		 2568static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2569 struct ieee80211_mgmt *mgmt, size_t len)
66e67e41
JB		 2570{
2571 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2572 u8 bssid[ETH_ALEN];
2573 u16 auth_alg, auth_transaction, status_code;
2574 struct sta_info *sta;
a9409093
EG		 2575 struct ieee80211_event event = {
2576 .type = MLME_EVENT,
2577 .u.mlme.data = AUTH_EVENT,
2578 };
66e67e41 2579
8d61ffa5 2580 sdata_assert_lock(sdata);
66e67e41
JB		 2581
2582 if (len < 24 + 6)
8d61ffa5 2583 return;
66e67e41
JB		 2584
2585 if (!ifmgd->auth_data || ifmgd->auth_data->done)
8d61ffa5 2586 return;
66e67e41
JB		 2587
2588 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2589
b203ca39 2590 if (!ether_addr_equal(bssid, mgmt->bssid))
8d61ffa5 2591 return;
66e67e41
JB		 2592
2593 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2594 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2595 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2596
2597 if (auth_alg != ifmgd->auth_data->algorithm ||
0f4126e8
JM		 2598 auth_transaction != ifmgd->auth_data->expected_transaction) {
2599 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2600 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2601 auth_transaction,
2602 ifmgd->auth_data->expected_transaction);
8d61ffa5 2603 return;
0f4126e8 2604 }
66e67e41
JB		 2605
2606 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2607 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2608 mgmt->sa, status_code);
dac211ec 2609 ieee80211_destroy_auth_data(sdata, false);
6ff57cf8 2610 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
a9409093
EG		 2611 event.u.mlme.status = MLME_DENIED;
2612 event.u.mlme.reason = status_code;
2613 drv_event_callback(sdata->local, sdata, &event);
8d61ffa5 2614 return;
66e67e41
JB		 2615 }
2616
2617 switch (ifmgd->auth_data->algorithm) {
2618 case WLAN_AUTH_OPEN:
2619 case WLAN_AUTH_LEAP:
2620 case WLAN_AUTH_FT:
6b8ece3a 2621 case WLAN_AUTH_SAE:
66e67e41
JB		 2622 break;
2623 case WLAN_AUTH_SHARED_KEY:
2624 if (ifmgd->auth_data->expected_transaction != 4) {
2625 ieee80211_auth_challenge(sdata, mgmt, len);
2626 /* need another frame */
8d61ffa5 2627 return;
66e67e41
JB		 2628 }
2629 break;
2630 default:
2631 WARN_ONCE(1, "invalid auth alg %d",
2632 ifmgd->auth_data->algorithm);
8d61ffa5 2633 return;
66e67e41
JB		 2634 }
2635
a9409093
EG		 2636 event.u.mlme.status = MLME_SUCCESS;
2637 drv_event_callback(sdata->local, sdata, &event);
bdcbd8e0 2638 sdata_info(sdata, "authenticated\n");
66e67e41
JB		 2639 ifmgd->auth_data->done = true;
2640 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
89afe614 2641 ifmgd->auth_data->timeout_started = true;
8d61ffa5 2642 run_again(sdata, ifmgd->auth_data->timeout);
66e67e41 2643
6b8ece3a
JM		 2644 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2645 ifmgd->auth_data->expected_transaction != 2) {
2646 /*
2647 * Report auth frame to user space for processing since another
2648 * round of Authentication frames is still needed.
2649 */
6ff57cf8 2650 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
8d61ffa5 2651 return;
6b8ece3a
JM		 2652 }
2653
66e67e41
JB		 2654 /* move station state to auth */
2655 mutex_lock(&sdata->local->sta_mtx);
2656 sta = sta_info_get(sdata, bssid);
2657 if (!sta) {
2658 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2659 goto out_err;
2660 }
2661 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
bdcbd8e0 2662 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
66e67e41
JB		 2663 goto out_err;
2664 }
2665 mutex_unlock(&sdata->local->sta_mtx);
2666
6ff57cf8 2667 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
8d61ffa5 2668 return;
66e67e41
JB		 2669 out_err:
2670 mutex_unlock(&sdata->local->sta_mtx);
2671 /* ignore frame -- wait for timeout */
66e67e41
JB		 2672}
2673
dfa1ad29
CO		 2674#define case_WLAN(type) \
2675 case WLAN_REASON_##type: return #type
2676
2677static const char *ieee80211_get_reason_code_string(u16 reason_code)
2678{
2679 switch (reason_code) {
2680 case_WLAN(UNSPECIFIED);
2681 case_WLAN(PREV_AUTH_NOT_VALID);
2682 case_WLAN(DEAUTH_LEAVING);
2683 case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2684 case_WLAN(DISASSOC_AP_BUSY);
2685 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2686 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2687 case_WLAN(DISASSOC_STA_HAS_LEFT);
2688 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2689 case_WLAN(DISASSOC_BAD_POWER);
2690 case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2691 case_WLAN(INVALID_IE);
2692 case_WLAN(MIC_FAILURE);
2693 case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2694 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2695 case_WLAN(IE_DIFFERENT);
2696 case_WLAN(INVALID_GROUP_CIPHER);
2697 case_WLAN(INVALID_PAIRWISE_CIPHER);
2698 case_WLAN(INVALID_AKMP);
2699 case_WLAN(UNSUPP_RSN_VERSION);
2700 case_WLAN(INVALID_RSN_IE_CAP);
2701 case_WLAN(IEEE8021X_FAILED);
2702 case_WLAN(CIPHER_SUITE_REJECTED);
2703 case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2704 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2705 case_WLAN(DISASSOC_LOW_ACK);
2706 case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2707 case_WLAN(QSTA_LEAVE_QBSS);
2708 case_WLAN(QSTA_NOT_USE);
2709 case_WLAN(QSTA_REQUIRE_SETUP);
2710 case_WLAN(QSTA_TIMEOUT);
2711 case_WLAN(QSTA_CIPHER_NOT_SUPP);
2712 case_WLAN(MESH_PEER_CANCELED);
2713 case_WLAN(MESH_MAX_PEERS);
2714 case_WLAN(MESH_CONFIG);
2715 case_WLAN(MESH_CLOSE);
2716 case_WLAN(MESH_MAX_RETRIES);
2717 case_WLAN(MESH_CONFIRM_TIMEOUT);
2718 case_WLAN(MESH_INVALID_GTK);
2719 case_WLAN(MESH_INCONSISTENT_PARAM);
2720 case_WLAN(MESH_INVALID_SECURITY);
2721 case_WLAN(MESH_PATH_ERROR);
2722 case_WLAN(MESH_PATH_NOFORWARD);
2723 case_WLAN(MESH_PATH_DEST_UNREACHABLE);
2724 case_WLAN(MAC_EXISTS_IN_MBSS);
2725 case_WLAN(MESH_CHAN_REGULATORY);
2726 case_WLAN(MESH_CHAN);
2727 default: return "<unknown>";
2728 }
2729}
66e67e41 2730
8d61ffa5
JB		 2731static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2732 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2733{
46900298 2734 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
c9c99f89 2735 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
f0706e82 2736
8d61ffa5 2737 sdata_assert_lock(sdata);
66e67e41 2738
f4ea83dd 2739 if (len < 24 + 2)
8d61ffa5 2740 return;
f0706e82 2741
c9c99f89
JB		 2742 if (ifmgd->associated &&
2743 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) {
2744 const u8 *bssid = ifmgd->associated->bssid;
77fdaa12 2745
c9c99f89
JB		 2746 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
2747 bssid, reason_code,
2748 ieee80211_get_reason_code_string(reason_code));
f0706e82 2749
c9c99f89 2750 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
f0706e82 2751
c9c99f89
JB		 2752 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false,
2753 reason_code);
2754 return;
2755 }
77fdaa12 2756
c9c99f89
JB		 2757 if (ifmgd->assoc_data &&
2758 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
2759 const u8 *bssid = ifmgd->assoc_data->bss->bssid;
37ad3888 2760
c9c99f89
JB		 2761 sdata_info(sdata,
2762 "deauthenticated from %pM while associating (Reason: %u=%s)\n",
2763 bssid, reason_code,
2764 ieee80211_get_reason_code_string(reason_code));
2765
2766 ieee80211_destroy_assoc_data(sdata, false);
2767
2768 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2769 return;
2770 }
f0706e82
JB		 2771}
2772
2773
8d61ffa5
JB		 2774static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2775 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2776{
46900298 2777 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 2778 u16 reason_code;
2779
8d61ffa5 2780 sdata_assert_lock(sdata);
77fdaa12 2781
66e67e41 2782 if (len < 24 + 2)
8d61ffa5 2783 return;
77fdaa12 2784
66e67e41 2785 if (!ifmgd->associated ||
b203ca39 2786 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
8d61ffa5 2787 return;
f0706e82
JB		 2788
2789 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2790
bdcbd8e0
JB		 2791 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2792 mgmt->sa, reason_code);
f0706e82 2793
37ad3888
JB		 2794 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2795
a90faa9d 2796 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code);
f0706e82
JB		 2797}
2798
c74d084f
CL		 2799static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2800 u8 *supp_rates, unsigned int supp_rates_len,
2801 u32 *rates, u32 *basic_rates,
2802 bool *have_higher_than_11mbit,
2103dec1
SW		 2803 int *min_rate, int *min_rate_index,
2804 int shift, u32 rate_flags)
c74d084f
CL		 2805{
2806 int i, j;
2807
2808 for (i = 0; i < supp_rates_len; i++) {
2103dec1 2809 int rate = supp_rates[i] & 0x7f;
c74d084f
CL		 2810 bool is_basic = !!(supp_rates[i] & 0x80);
2811
2103dec1 2812 if ((rate * 5 * (1 << shift)) > 110)
c74d084f
CL		 2813 *have_higher_than_11mbit = true;
2814
2815 /*
2816 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2817 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2818 *
2819 * Note: Even through the membership selector and the basic
2820 * rate flag share the same bit, they are not exactly
2821 * the same.
2822 */
2823 if (!!(supp_rates[i] & 0x80) &&
2824 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2825 continue;
2826
2827 for (j = 0; j < sband->n_bitrates; j++) {
2103dec1
SW		 2828 struct ieee80211_rate *br;
2829 int brate;
2830
2831 br = &sband->bitrates[j];
2832 if ((rate_flags & br->flags) != rate_flags)
2833 continue;
2834
2835 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2836 if (brate == rate) {
c74d084f
CL		 2837 *rates |= BIT(j);
2838 if (is_basic)
2839 *basic_rates |= BIT(j);
2103dec1
SW		 2840 if ((rate * 5) < *min_rate) {
2841 *min_rate = rate * 5;
c74d084f
CL		 2842 *min_rate_index = j;
2843 }
2844 break;
2845 }
2846 }
2847 }
2848}
f0706e82 2849
66e67e41
JB		 2850static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2851 struct cfg80211_bss *cbss,
af6b6374 2852 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2853{
46900298 2854 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 2855 struct ieee80211_local *local = sdata->local;
8318d78a 2856 struct ieee80211_supported_band *sband;
f0706e82 2857 struct sta_info *sta;
af6b6374 2858 u8 *pos;
af6b6374 2859 u16 capab_info, aid;
f0706e82 2860 struct ieee802_11_elems elems;
bda3933a 2861 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
35d865af
JB		 2862 const struct cfg80211_bss_ies *bss_ies = NULL;
2863 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
ae5eb026 2864 u32 changed = 0;
c74d084f 2865 int err;
35d865af 2866 bool ret;
f0706e82 2867
af6b6374 2868 /* AssocResp and ReassocResp have identical structure */
f0706e82 2869
f0706e82 2870 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 2871 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 2872
1dd84aa2 2873 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
bdcbd8e0
JB		 2874 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2875 aid);
1dd84aa2
JB		 2876 aid &= ~(BIT(15) | BIT(14));
2877
05cb9108
JB		 2878 ifmgd->broken_ap = false;
2879
2880 if (aid == 0 || aid > IEEE80211_MAX_AID) {
bdcbd8e0
JB		 2881 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2882 aid);
05cb9108
JB		 2883 aid = 0;
2884 ifmgd->broken_ap = true;
2885 }
2886
af6b6374 2887 pos = mgmt->u.assoc_resp.variable;
b2e506bf 2888 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
af6b6374 2889
f0706e82 2890 if (!elems.supp_rates) {
bdcbd8e0 2891 sdata_info(sdata, "no SuppRates element in AssocResp\n");
af6b6374 2892 return false;
f0706e82
JB		 2893 }
2894
46900298 2895 ifmgd->aid = aid;
9041c1fa
AN		 2896 ifmgd->tdls_chan_switch_prohibited =
2897 elems.ext_capab && elems.ext_capab_len >= 5 &&
2898 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
f0706e82 2899
35d865af
JB		 2900 /*
2901 * Some APs are erroneously not including some information in their
2902 * (re)association response frames. Try to recover by using the data
2903 * from the beacon or probe response. This seems to afflict mobile
2904 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2905 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2906 */
2907 if ((assoc_data->wmm && !elems.wmm_param) ||
2908 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2909 (!elems.ht_cap_elem || !elems.ht_operation)) ||
2910 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2911 (!elems.vht_cap_elem || !elems.vht_operation))) {
2912 const struct cfg80211_bss_ies *ies;
2913 struct ieee802_11_elems bss_elems;
2914
2915 rcu_read_lock();
2916 ies = rcu_dereference(cbss->ies);
2917 if (ies)
2918 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2919 GFP_ATOMIC);
2920 rcu_read_unlock();
2921 if (!bss_ies)
2922 return false;
2923
2924 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2925 false, &bss_elems);
2926 if (assoc_data->wmm &&
2927 !elems.wmm_param && bss_elems.wmm_param) {
2928 elems.wmm_param = bss_elems.wmm_param;
2929 sdata_info(sdata,
2930 "AP bug: WMM param missing from AssocResp\n");
2931 }
2932
2933 /*
2934 * Also check if we requested HT/VHT, otherwise the AP doesn't
2935 * have to include the IEs in the (re)association response.
2936 */
2937 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2938 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2939 elems.ht_cap_elem = bss_elems.ht_cap_elem;
2940 sdata_info(sdata,
2941 "AP bug: HT capability missing from AssocResp\n");
2942 }
2943 if (!elems.ht_operation && bss_elems.ht_operation &&
2944 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2945 elems.ht_operation = bss_elems.ht_operation;
2946 sdata_info(sdata,
2947 "AP bug: HT operation missing from AssocResp\n");
2948 }
2949 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2950 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2951 elems.vht_cap_elem = bss_elems.vht_cap_elem;
2952 sdata_info(sdata,
2953 "AP bug: VHT capa missing from AssocResp\n");
2954 }
2955 if (!elems.vht_operation && bss_elems.vht_operation &&
2956 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2957 elems.vht_operation = bss_elems.vht_operation;
2958 sdata_info(sdata,
2959 "AP bug: VHT operation missing from AssocResp\n");
2960 }
2961 }
2962
30eb1dc2
JB		 2963 /*
2964 * We previously checked these in the beacon/probe response, so
2965 * they should be present here. This is just a safety net.
2966 */
2967 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2968 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2969 sdata_info(sdata,
35d865af
JB		 2970 "HT AP is missing WMM params or HT capability/operation\n");
2971 ret = false;
2972 goto out;
30eb1dc2
JB		 2973 }
2974
2975 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2976 (!elems.vht_cap_elem || !elems.vht_operation)) {
2977 sdata_info(sdata,
35d865af
JB		 2978 "VHT AP is missing VHT capability/operation\n");
2979 ret = false;
2980 goto out;
30eb1dc2
JB		 2981 }
2982
2a33bee2
GE		 2983 mutex_lock(&sdata->local->sta_mtx);
2984 /*
2985 * station info was already allocated and inserted before
2986 * the association and should be available to us
2987 */
7852e361 2988 sta = sta_info_get(sdata, cbss->bssid);
2a33bee2
GE		 2989 if (WARN_ON(!sta)) {
2990 mutex_unlock(&sdata->local->sta_mtx);
35d865af
JB		 2991 ret = false;
2992 goto out;
77fdaa12 2993 }
05e5e883 2994
55de908a 2995 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
f709fc69 2996
30eb1dc2 2997 /* Set up internal HT/VHT capabilities */
a8243b72 2998 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
ef96a842 2999 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
e1a0c6b3 3000 elems.ht_cap_elem, sta);
64f68e5d 3001
818255ea
MP		 3002 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
3003 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
4a34215e 3004 elems.vht_cap_elem, sta);
818255ea 3005
30eb1dc2
JB		 3006 /*
3007 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
3008 * in their association response, so ignore that data for our own
3009 * configuration. If it changed since the last beacon, we'll get the
3010 * next beacon and update then.
3011 */
1128958d 3012
bee7f586
JB		 3013 /*
3014 * If an operating mode notification IE is present, override the
3015 * NSS calculation (that would be done in rate_control_rate_init())
3016 * and use the # of streams from that element.
3017 */
3018 if (elems.opmode_notif &&
3019 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
3020 u8 nss;
3021
3022 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
3023 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
3024 nss += 1;
3025 sta->sta.rx_nss = nss;
3026 }
3027
4b7679a5 3028 rate_control_rate_init(sta);
f0706e82 3029
93f0490e 3030 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) {
c2c98fde 3031 set_sta_flag(sta, WLAN_STA_MFP);
93f0490e
T		 3032 sta->sta.mfp = true;
3033 } else {
3034 sta->sta.mfp = false;
3035 }
5394af4d 3036
527871d7 3037 sta->sta.wme = elems.wmm_param && local->hw.queues >= IEEE80211_NUM_ACS;
ddf4ac53 3038
3e4d40fa 3039 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
c8987876
JB		 3040 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
3041 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
3042 if (err) {
bdcbd8e0
JB		 3043 sdata_info(sdata,
3044 "failed to move station %pM to desired state\n",
3045 sta->sta.addr);
c8987876
JB		 3046 WARN_ON(__sta_info_destroy(sta));
3047 mutex_unlock(&sdata->local->sta_mtx);
35d865af
JB		 3048 ret = false;
3049 goto out;
c8987876
JB		 3050 }
3051
7852e361 3052 mutex_unlock(&sdata->local->sta_mtx);
ddf4ac53 3053
f2176d72
JO		 3054 /*
3055 * Always handle WMM once after association regardless
3056 * of the first value the AP uses. Setting -1 here has
3057 * that effect because the AP values is an unsigned
3058 * 4-bit value.
3059 */
3060 ifmgd->wmm_last_param_set = -1;
3061
2ed77ea6 3062 if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
cec66283 3063 ieee80211_set_wmm_default(sdata, false, false);
2ed77ea6
JB		 3064 } else if (!ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3065 elems.wmm_param_len)) {
3066 /* still enable QoS since we might have HT/VHT */
3067 ieee80211_set_wmm_default(sdata, false, true);
3068 /* set the disable-WMM flag in this case to disable
3069 * tracking WMM parameter changes in the beacon if
3070 * the parameters weren't actually valid. Doing so
3071 * avoids changing parameters very strangely when
3072 * the AP is going back and forth between valid and
3073 * invalid parameters.
3074 */
3075 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
3076 }
3abead59 3077 changed |= BSS_CHANGED_QOS;
f0706e82 3078
60f8b39c
JB		 3079 /* set AID and assoc capability,
3080 * ieee80211_set_associated() will tell the driver */
3081 bss_conf->aid = aid;
3082 bss_conf->assoc_capability = capab_info;
0c1ad2ca 3083 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 3084
d524215f
FF		 3085 /*
3086 * If we're using 4-addr mode, let the AP know that we're
3087 * doing so, so that it can create the STA VLAN on its side
3088 */
3089 if (ifmgd->use_4addr)
3090 ieee80211_send_4addr_nullfunc(local, sdata);
3091
15b7b062 3092 /*
b291ba11
JB		 3093 * Start timer to probe the connection to the AP now.
3094 * Also start the timer that will detect beacon loss.
15b7b062 3095 */
b291ba11 3096 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 3097 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 3098
35d865af
JB		 3099 ret = true;
3100 out:
3101 kfree(bss_ies);
3102 return ret;
f0706e82
JB		 3103}
3104
8d61ffa5
JB		 3105static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
3106 struct ieee80211_mgmt *mgmt,
3107 size_t len)
66e67e41
JB		 3108{
3109 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3110 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3111 u16 capab_info, status_code, aid;
3112 struct ieee802_11_elems elems;
b0b6aa2c 3113 int ac, uapsd_queues = -1;
66e67e41
JB		 3114 u8 *pos;
3115 bool reassoc;
8d61ffa5 3116 struct cfg80211_bss *bss;
d0d1a12f
EG		 3117 struct ieee80211_event event = {
3118 .type = MLME_EVENT,
3119 .u.mlme.data = ASSOC_EVENT,
3120 };
66e67e41 3121
8d61ffa5 3122 sdata_assert_lock(sdata);
66e67e41
JB		 3123
3124 if (!assoc_data)
8d61ffa5 3125 return;
b203ca39 3126 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
8d61ffa5 3127 return;
66e67e41
JB		 3128
3129 /*
3130 * AssocResp and ReassocResp have identical structure, so process both
3131 * of them in this function.
3132 */
3133
3134 if (len < 24 + 6)
8d61ffa5 3135 return;
66e67e41
JB		 3136
3137 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
3138 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3139 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
3140 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3141
bdcbd8e0
JB		 3142 sdata_info(sdata,
3143 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3144 reassoc ? "Rea" : "A", mgmt->sa,
3145 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
66e67e41
JB		 3146
3147 pos = mgmt->u.assoc_resp.variable;
b2e506bf 3148 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
66e67e41
JB		 3149
3150 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
79ba1d89
JB		 3151 elems.timeout_int &&
3152 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
66e67e41 3153 u32 tu, ms;
79ba1d89 3154 tu = le32_to_cpu(elems.timeout_int->value);
66e67e41 3155 ms = tu * 1024 / 1000;
bdcbd8e0
JB		 3156 sdata_info(sdata,
3157 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3158 mgmt->sa, tu, ms);
66e67e41 3159 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
89afe614 3160 assoc_data->timeout_started = true;
66e67e41 3161 if (ms > IEEE80211_ASSOC_TIMEOUT)
8d61ffa5
JB		 3162 run_again(sdata, assoc_data->timeout);
3163 return;
66e67e41
JB		 3164 }
3165
8d61ffa5 3166 bss = assoc_data->bss;
66e67e41
JB		 3167
3168 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 3169 sdata_info(sdata, "%pM denied association (code=%d)\n",
3170 mgmt->sa, status_code);
66e67e41 3171 ieee80211_destroy_assoc_data(sdata, false);
d0d1a12f
EG		 3172 event.u.mlme.status = MLME_DENIED;
3173 event.u.mlme.reason = status_code;
3174 drv_event_callback(sdata->local, sdata, &event);
66e67e41 3175 } else {
8d61ffa5 3176 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
66e67e41 3177 /* oops -- internal error -- send timeout for now */
10a9109f 3178 ieee80211_destroy_assoc_data(sdata, false);
959867fa 3179 cfg80211_assoc_timeout(sdata->dev, bss);
8d61ffa5 3180 return;
66e67e41 3181 }
d0d1a12f
EG		 3182 event.u.mlme.status = MLME_SUCCESS;
3183 drv_event_callback(sdata->local, sdata, &event);
635d999f 3184 sdata_info(sdata, "associated\n");
79ebfb85
JB		 3185
3186 /*
3187 * destroy assoc_data afterwards, as otherwise an idle
3188 * recalc after assoc_data is NULL but before associated
3189 * is set can cause the interface to go idle
3190 */
3191 ieee80211_destroy_assoc_data(sdata, true);
b0b6aa2c
EP		 3192
3193 /* get uapsd queues configuration */
3194 uapsd_queues = 0;
3195 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
3196 if (sdata->tx_conf[ac].uapsd)
3197 uapsd_queues |= BIT(ac);
66e67e41
JB		 3198 }
3199
b0b6aa2c 3200 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues);
66e67e41 3201}
8e3c1b77 3202
98c8fccf 3203static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
8e3c1b77 3204 struct ieee80211_mgmt *mgmt, size_t len,
98c8fccf 3205 struct ieee80211_rx_status *rx_status,
d45c4172 3206 struct ieee802_11_elems *elems)
98c8fccf
JB		 3207{
3208 struct ieee80211_local *local = sdata->local;
c2b13452 3209 struct ieee80211_bss *bss;
98c8fccf 3210 struct ieee80211_channel *channel;
56007a02 3211
8d61ffa5 3212 sdata_assert_lock(sdata);
b4f286a1 3213
3afc2167
EG		 3214 channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
3215 if (!channel)
98c8fccf
JB		 3216 return;
3217
98c8fccf 3218 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
d45c4172 3219 channel);
817cee76 3220 if (bss) {
817cee76 3221 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
d2722f8b 3222 ieee80211_rx_bss_put(local, bss);
817cee76 3223 }
f0706e82
JB		 3224}
3225
3226
f698d856 3227static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 3228 struct sk_buff *skb)
f0706e82 3229{
af6b6374 3230 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 3231 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 3232 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
3233 size_t baselen, len = skb->len;
ae6a44e3
EK		 3234 struct ieee802_11_elems elems;
3235
15b7b062
KV		 3236 ifmgd = &sdata->u.mgd;
3237
8d61ffa5 3238 sdata_assert_lock(sdata);
77fdaa12 3239
b203ca39 3240 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
8e7cdbb6
TW		 3241 return; /* ignore ProbeResp to foreign address */
3242
ae6a44e3
EK		 3243 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
3244 if (baselen > len)
3245 return;
3246
3247 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
b2e506bf 3248 false, &elems);
ae6a44e3 3249
d45c4172 3250 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
9859b81e 3251
77fdaa12 3252 if (ifmgd->associated &&
b203ca39 3253 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
4e5ff376 3254 ieee80211_reset_ap_probe(sdata);
f0706e82
JB		 3255}
3256
d91f36db
JB		 3257/*
3258 * This is the canonical list of information elements we care about,
3259 * the filter code also gives us all changes to the Microsoft OUI
c8d65917
SG		 3260 * (00:50:F2) vendor IE which is used for WMM which we need to track,
3261 * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3262 * changes to requested client power.
d91f36db
JB		 3263 *
3264 * We implement beacon filtering in software since that means we can
3265 * avoid processing the frame here and in cfg80211, and userspace
3266 * will not be able to tell whether the hardware supports it or not.
3267 *
3268 * XXX: This list needs to be dynamic -- userspace needs to be able to
3269 * add items it requires. It also needs to be able to tell us to
3270 * look out for other vendor IEs.
3271 */
3272static const u64 care_about_ies =
1d4df3a5
JB		 3273 (1ULL << WLAN_EID_COUNTRY) |
3274 (1ULL << WLAN_EID_ERP_INFO) |
3275 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
3276 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
3277 (1ULL << WLAN_EID_HT_CAPABILITY) |
70a3fd6c
JB		 3278 (1ULL << WLAN_EID_HT_OPERATION) |
3279 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN);
d91f36db 3280
8d61ffa5
JB		 3281static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
3282 struct ieee80211_mgmt *mgmt, size_t len,
3283 struct ieee80211_rx_status *rx_status)
f0706e82 3284{
d91f36db 3285 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 3286 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 3287 size_t baselen;
3288 struct ieee802_11_elems elems;
f698d856 3289 struct ieee80211_local *local = sdata->local;
55de908a
JB		 3290 struct ieee80211_chanctx_conf *chanctx_conf;
3291 struct ieee80211_channel *chan;
bee7f586 3292 struct sta_info *sta;
471b3efd 3293 u32 changed = 0;
f87ad637 3294 bool erp_valid;
7a5158ef 3295 u8 erp_value = 0;
d91f36db 3296 u32 ncrc;
77fdaa12 3297 u8 *bssid;
8d61ffa5 3298 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
77fdaa12 3299
8d61ffa5 3300 sdata_assert_lock(sdata);
f0706e82 3301
ae6a44e3
EK		 3302 /* Process beacon from the current BSS */
3303 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3304 if (baselen > len)
8d61ffa5 3305 return;
ae6a44e3 3306
55de908a
JB		 3307 rcu_read_lock();
3308 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3309 if (!chanctx_conf) {
3310 rcu_read_unlock();
8d61ffa5 3311 return;
55de908a
JB		 3312 }
3313
4bf88530 3314 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
55de908a 3315 rcu_read_unlock();
8d61ffa5 3316 return;
55de908a 3317 }
4bf88530 3318 chan = chanctx_conf->def.chan;
55de908a 3319 rcu_read_unlock();
f0706e82 3320
c65dd147 3321 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
b203ca39 3322 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
66e67e41 3323 ieee802_11_parse_elems(mgmt->u.beacon.variable,
b2e506bf 3324 len - baselen, false, &elems);
77fdaa12 3325
d45c4172 3326 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
482a9c74
AB		 3327 if (elems.tim && !elems.parse_error) {
3328 const struct ieee80211_tim_ie *tim_ie = elems.tim;
3329 ifmgd->dtim_period = tim_ie->dtim_period;
3330 }
989c6505 3331 ifmgd->have_beacon = true;
c65dd147 3332 ifmgd->assoc_data->need_beacon = false;
30686bf7 3333 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
ef429dad
JB		 3334 sdata->vif.bss_conf.sync_tsf =
3335 le64_to_cpu(mgmt->u.beacon.timestamp);
3336 sdata->vif.bss_conf.sync_device_ts =
3337 rx_status->device_timestamp;
3338 if (elems.tim)
3339 sdata->vif.bss_conf.sync_dtim_count =
3340 elems.tim->dtim_count;
3341 else
3342 sdata->vif.bss_conf.sync_dtim_count = 0;
3343 }
66e67e41
JB		 3344 /* continue assoc process */
3345 ifmgd->assoc_data->timeout = jiffies;
89afe614 3346 ifmgd->assoc_data->timeout_started = true;
8d61ffa5
JB		 3347 run_again(sdata, ifmgd->assoc_data->timeout);
3348 return;
66e67e41 3349 }
77fdaa12 3350
66e67e41 3351 if (!ifmgd->associated ||
b203ca39 3352 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
8d61ffa5 3353 return;
66e67e41 3354 bssid = ifmgd->associated->bssid;
f0706e82 3355
17e4ec14 3356 /* Track average RSSI from the Beacon frames of the current AP */
17e4ec14
JM		 3357 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3358 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
338c17ae 3359 ewma_beacon_signal_init(&ifmgd->ave_beacon_signal);
17e4ec14 3360 ifmgd->last_cqm_event_signal = 0;
391a200a 3361 ifmgd->count_beacon_signal = 1;
615f7b9b 3362 ifmgd->last_ave_beacon_signal = 0;
17e4ec14 3363 } else {
391a200a 3364 ifmgd->count_beacon_signal++;
17e4ec14 3365 }
615f7b9b 3366
338c17ae
JB		 3367 ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal);
3368
615f7b9b
MV		 3369 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3370 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
338c17ae 3371 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
615f7b9b 3372 int last_sig = ifmgd->last_ave_beacon_signal;
a8182929
EG		 3373 struct ieee80211_event event = {
3374 .type = RSSI_EVENT,
3375 };
615f7b9b
MV		 3376
3377 /*
3378 * if signal crosses either of the boundaries, invoke callback
3379 * with appropriate parameters
3380 */
3381 if (sig > ifmgd->rssi_max_thold &&
3382 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3383 ifmgd->last_ave_beacon_signal = sig;
a8182929
EG		 3384 event.u.rssi.data = RSSI_EVENT_HIGH;
3385 drv_event_callback(local, sdata, &event);
615f7b9b
MV		 3386 } else if (sig < ifmgd->rssi_min_thold &&
3387 (last_sig >= ifmgd->rssi_max_thold ||
3388 last_sig == 0)) {
3389 ifmgd->last_ave_beacon_signal = sig;
a8182929
EG		 3390 event.u.rssi.data = RSSI_EVENT_LOW;
3391 drv_event_callback(local, sdata, &event);
615f7b9b
MV		 3392 }
3393 }
3394
17e4ec14 3395 if (bss_conf->cqm_rssi_thold &&
391a200a 3396 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
ea086359 3397 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
338c17ae 3398 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
17e4ec14
JM		 3399 int last_event = ifmgd->last_cqm_event_signal;
3400 int thold = bss_conf->cqm_rssi_thold;
3401 int hyst = bss_conf->cqm_rssi_hyst;
338c17ae 3402
17e4ec14
JM		 3403 if (sig < thold &&
3404 (last_event == 0 || sig < last_event - hyst)) {
3405 ifmgd->last_cqm_event_signal = sig;
3406 ieee80211_cqm_rssi_notify(
3407 &sdata->vif,
3408 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3409 GFP_KERNEL);
3410 } else if (sig > thold &&
3411 (last_event == 0 || sig > last_event + hyst)) {
3412 ifmgd->last_cqm_event_signal = sig;
3413 ieee80211_cqm_rssi_notify(
3414 &sdata->vif,
3415 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3416 GFP_KERNEL);
3417 }
3418 }
3419
392b9ffb 3420 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
bdcbd8e0 3421 mlme_dbg_ratelimited(sdata,
112c31f0 3422 "cancelling AP probe due to a received beacon\n");
392b9ffb 3423 ieee80211_reset_ap_probe(sdata);
92778180
JM		 3424 }
3425
b291ba11
JB		 3426 /*
3427 * Push the beacon loss detection into the future since
3428 * we are processing a beacon from the AP just now.
3429 */
d3a910a8 3430 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 3431
d91f36db
JB		 3432 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3433 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
b2e506bf 3434 len - baselen, false, &elems,
d91f36db
JB		 3435 care_about_ies, ncrc);
3436
90d13e8f
JB		 3437 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
3438 ieee80211_check_tim(elems.tim, elems.tim_len, ifmgd->aid)) {
3439 if (local->hw.conf.dynamic_ps_timeout > 0) {
3440 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3441 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3442 ieee80211_hw_config(local,
3443 IEEE80211_CONF_CHANGE_PS);
572e0012 3444 }
076cdcb1 3445 ieee80211_send_nullfunc(local, sdata, false);
90d13e8f
JB		 3446 } else if (!local->pspolling && sdata->u.mgd.powersave) {
3447 local->pspolling = true;
3448
3449 /*
3450 * Here is assumed that the driver will be
3451 * able to send ps-poll frame and receive a
3452 * response even though power save mode is
3453 * enabled, but some drivers might require
3454 * to disable power save here. This needs
3455 * to be investigated.
3456 */
3457 ieee80211_send_pspoll(local, sdata);
a97b77b9
VN		 3458 }
3459 }
7a5158ef 3460
488dd7b5 3461 if (sdata->vif.p2p) {
67baf663 3462 struct ieee80211_p2p_noa_attr noa = {};
488dd7b5
JB		 3463 int ret;
3464
3465 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3466 len - baselen,
3467 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
934457ee 3468 (u8 *) &noa, sizeof(noa));
67baf663
JD		 3469 if (ret >= 2) {
3470 if (sdata->u.mgd.p2p_noa_index != noa.index) {
3471 /* valid noa_attr and index changed */
3472 sdata->u.mgd.p2p_noa_index = noa.index;
3473 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3474 changed |= BSS_CHANGED_P2P_PS;
3475 /*
3476 * make sure we update all information, the CRC
3477 * mechanism doesn't look at P2P attributes.
3478 */
3479 ifmgd->beacon_crc_valid = false;
3480 }
3481 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3482 /* noa_attr not found and we had valid noa_attr before */
3483 sdata->u.mgd.p2p_noa_index = -1;
3484 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
488dd7b5 3485 changed |= BSS_CHANGED_P2P_PS;
488dd7b5
JB		 3486 ifmgd->beacon_crc_valid = false;
3487 }
3488 }
3489
0c21e632
LC		 3490 if (ifmgd->csa_waiting_bcn)
3491 ieee80211_chswitch_post_beacon(sdata);
3492
2ecc3905
AB		 3493 /*
3494 * Update beacon timing and dtim count on every beacon appearance. This
3495 * will allow the driver to use the most updated values. Do it before
3496 * comparing this one with last received beacon.
3497 * IMPORTANT: These parameters would possibly be out of sync by the time
3498 * the driver will use them. The synchronized view is currently
3499 * guaranteed only in certain callbacks.
3500 */
30686bf7 3501 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
2ecc3905
AB		 3502 sdata->vif.bss_conf.sync_tsf =
3503 le64_to_cpu(mgmt->u.beacon.timestamp);
3504 sdata->vif.bss_conf.sync_device_ts =
3505 rx_status->device_timestamp;
3506 if (elems.tim)
3507 sdata->vif.bss_conf.sync_dtim_count =
3508 elems.tim->dtim_count;
3509 else
3510 sdata->vif.bss_conf.sync_dtim_count = 0;
3511 }
3512
d8ec4433 3513 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
8d61ffa5 3514 return;
30196673 3515 ifmgd->beacon_crc = ncrc;
d8ec4433 3516 ifmgd->beacon_crc_valid = true;
30196673 3517
d45c4172 3518 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
7d25745d 3519
d70b7616 3520 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
2ba45384 3521 rx_status->device_timestamp,
d70b7616
JB		 3522 &elems, true);
3523
095d81ce
JB		 3524 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3525 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
7d25745d
JB		 3526 elems.wmm_param_len))
3527 changed |= BSS_CHANGED_QOS;
3528
c65dd147
EG		 3529 /*
3530 * If we haven't had a beacon before, tell the driver about the
ef429dad 3531 * DTIM period (and beacon timing if desired) now.
c65dd147 3532 */
989c6505 3533 if (!ifmgd->have_beacon) {
c65dd147
EG		 3534 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3535 if (elems.tim)
3536 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3537 else
3538 bss_conf->dtim_period = 1;
ef429dad 3539
989c6505
AB		 3540 changed |= BSS_CHANGED_BEACON_INFO;
3541 ifmgd->have_beacon = true;
482a9c74
AB		 3542
3543 mutex_lock(&local->iflist_mtx);
4a733ef1 3544 ieee80211_recalc_ps(local);
482a9c74
AB		 3545 mutex_unlock(&local->iflist_mtx);
3546
ce857888 3547 ieee80211_recalc_ps_vif(sdata);
c65dd147
EG		 3548 }
3549
1946bed9 3550 if (elems.erp_info) {
7a5158ef
JB		 3551 erp_valid = true;
3552 erp_value = elems.erp_info[0];
3553 } else {
3554 erp_valid = false;
50c4afb9 3555 }
7a5158ef
JB		 3556 changed |= ieee80211_handle_bss_capability(sdata,
3557 le16_to_cpu(mgmt->u.beacon.capab_info),
3558 erp_valid, erp_value);
f0706e82 3559
1128958d 3560 mutex_lock(&local->sta_mtx);
bee7f586
JB		 3561 sta = sta_info_get(sdata, bssid);
3562
53b954ee
EP		 3563 if (ieee80211_config_bw(sdata, sta,
3564 elems.ht_cap_elem, elems.ht_operation,
30eb1dc2
JB		 3565 elems.vht_operation, bssid, &changed)) {
3566 mutex_unlock(&local->sta_mtx);
3567 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3568 WLAN_REASON_DEAUTH_LEAVING,
3569 true, deauth_buf);
a90faa9d
EG		 3570 ieee80211_report_disconnect(sdata, deauth_buf,
3571 sizeof(deauth_buf), true,
3572 WLAN_REASON_DEAUTH_LEAVING);
8d61ffa5 3573 return;
30eb1dc2 3574 }
bee7f586
JB		 3575
3576 if (sta && elems.opmode_notif)
3577 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3578 rx_status->band, true);
1128958d 3579 mutex_unlock(&local->sta_mtx);
d3c990fb 3580
24a4e400
SG		 3581 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
3582 elems.country_elem,
3583 elems.country_elem_len,
c8d65917
SG		 3584 elems.pwr_constr_elem,
3585 elems.cisco_dtpc_elem);
3f2355cb 3586
471b3efd 3587 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 3588}
3589
1fa57d01
JB		 3590void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3591 struct sk_buff *skb)
f0706e82
JB		 3592{
3593 struct ieee80211_rx_status *rx_status;
f0706e82
JB		 3594 struct ieee80211_mgmt *mgmt;
3595 u16 fc;
1b3a2e49
JB		 3596 struct ieee802_11_elems elems;
3597 int ies_len;
f0706e82 3598
f0706e82
JB		 3599 rx_status = (struct ieee80211_rx_status *) skb->cb;
3600 mgmt = (struct ieee80211_mgmt *) skb->data;
3601 fc = le16_to_cpu(mgmt->frame_control);
3602
8d61ffa5 3603 sdata_lock(sdata);
77fdaa12 3604
66e67e41
JB		 3605 switch (fc & IEEE80211_FCTL_STYPE) {
3606 case IEEE80211_STYPE_BEACON:
8d61ffa5 3607 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
66e67e41
JB		 3608 break;
3609 case IEEE80211_STYPE_PROBE_RESP:
3610 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3611 break;
3612 case IEEE80211_STYPE_AUTH:
8d61ffa5 3613 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
66e67e41
JB		 3614 break;
3615 case IEEE80211_STYPE_DEAUTH:
8d61ffa5 3616 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
66e67e41
JB		 3617 break;
3618 case IEEE80211_STYPE_DISASSOC:
8d61ffa5 3619 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
66e67e41
JB		 3620 break;
3621 case IEEE80211_STYPE_ASSOC_RESP:
3622 case IEEE80211_STYPE_REASSOC_RESP:
8d61ffa5 3623 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
66e67e41
JB		 3624 break;
3625 case IEEE80211_STYPE_ACTION:
37799e52 3626 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
1b3a2e49
JB		 3627 ies_len = skb->len -
3628 offsetof(struct ieee80211_mgmt,
3629 u.action.u.chan_switch.variable);
37799e52
JB		 3630
3631 if (ies_len < 0)
3632 break;
3633
3634 ieee802_11_parse_elems(
3635 mgmt->u.action.u.chan_switch.variable,
b2e506bf 3636 ies_len, true, &elems);
37799e52
JB		 3637
3638 if (elems.parse_error)
3639 break;
3640
1b3a2e49 3641 ieee80211_sta_process_chanswitch(sdata,
2ba45384
LC		 3642 rx_status->mactime,
3643 rx_status->device_timestamp,
3644 &elems, false);
1b3a2e49
JB		 3645 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3646 ies_len = skb->len -
3647 offsetof(struct ieee80211_mgmt,
3648 u.action.u.ext_chan_switch.variable);
3649
3650 if (ies_len < 0)
3651 break;
3652
3653 ieee802_11_parse_elems(
3654 mgmt->u.action.u.ext_chan_switch.variable,
b2e506bf 3655 ies_len, true, &elems);
1b3a2e49
JB		 3656
3657 if (elems.parse_error)
3658 break;
3659
3660 /* for the handling code pretend this was also an IE */
3661 elems.ext_chansw_ie =
3662 &mgmt->u.action.u.ext_chan_switch.data;
3663
66e67e41 3664 ieee80211_sta_process_chanswitch(sdata,
2ba45384
LC		 3665 rx_status->mactime,
3666 rx_status->device_timestamp,
3667 &elems, false);
77fdaa12 3668 }
37799e52 3669 break;
77fdaa12 3670 }
8d61ffa5 3671 sdata_unlock(sdata);
f0706e82
JB		 3672}
3673
9c6bd790 3674static void ieee80211_sta_timer(unsigned long data)
f0706e82 3675{
60f8b39c
JB		 3676 struct ieee80211_sub_if_data *sdata =
3677 (struct ieee80211_sub_if_data *) data;
5bb644a0 3678
9b7d72c1 3679 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
f0706e82
JB		 3680}
3681
04ac3c0e 3682static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
6b684db1 3683 u8 *bssid, u8 reason, bool tx)
04ac3c0e 3684{
6ae16775 3685 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
04ac3c0e 3686
37ad3888 3687 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
6b684db1 3688 tx, frame_buf);
37ad3888 3689
a90faa9d
EG		 3690 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
3691 reason);
04ac3c0e
FF		 3692}
3693
46cad4b7 3694static int ieee80211_auth(struct ieee80211_sub_if_data *sdata)
66e67e41
JB		 3695{
3696 struct ieee80211_local *local = sdata->local;
3697 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3698 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
1672c0e3 3699 u32 tx_flags = 0;
46cad4b7
JB		 3700 u16 trans = 1;
3701 u16 status = 0;
66e67e41 3702
8d61ffa5 3703 sdata_assert_lock(sdata);
66e67e41
JB		 3704
3705 if (WARN_ON_ONCE(!auth_data))
3706 return -EINVAL;
3707
66e67e41
JB		 3708 auth_data->tries++;
3709
3710 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
bdcbd8e0
JB		 3711 sdata_info(sdata, "authentication with %pM timed out\n",
3712 auth_data->bss->bssid);
66e67e41
JB		 3713
3714 /*
3715 * Most likely AP is not in the range so remove the
3716 * bss struct for that AP.
3717 */
3718 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3719
3720 return -ETIMEDOUT;
3721 }
3722
a1845fc7
JB		 3723 drv_mgd_prepare_tx(local, sdata);
3724
46cad4b7
JB		 3725 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3726 auth_data->bss->bssid, auth_data->tries,
3727 IEEE80211_AUTH_MAX_TRIES);
66e67e41 3728
46cad4b7 3729 auth_data->expected_transaction = 2;
6b8ece3a 3730
46cad4b7
JB		 3731 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3732 trans = auth_data->sae_trans;
3733 status = auth_data->sae_status;
3734 auth_data->expected_transaction = trans;
3735 }
66e67e41 3736
46cad4b7
JB		 3737 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
3738 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3739 IEEE80211_TX_INTFL_MLME_CONN_TX;
66e67e41 3740
46cad4b7
JB		 3741 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3742 auth_data->data, auth_data->data_len,
3743 auth_data->bss->bssid,
3744 auth_data->bss->bssid, NULL, 0, 0,
3745 tx_flags);
66e67e41 3746
6211dd12 3747 if (tx_flags == 0) {
1672c0e3 3748 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
cb236d2d 3749 auth_data->timeout_started = true;
8d61ffa5 3750 run_again(sdata, auth_data->timeout);
89afe614 3751 } else {
cb236d2d
JB		 3752 auth_data->timeout =
3753 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3754 auth_data->timeout_started = true;
3755 run_again(sdata, auth_data->timeout);
1672c0e3 3756 }
66e67e41
JB		 3757
3758 return 0;
3759}
3760
3761static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3762{
3763 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3764 struct ieee80211_local *local = sdata->local;
3765
8d61ffa5 3766 sdata_assert_lock(sdata);
66e67e41 3767
66e67e41
JB		 3768 assoc_data->tries++;
3769 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
bdcbd8e0
JB		 3770 sdata_info(sdata, "association with %pM timed out\n",
3771 assoc_data->bss->bssid);
66e67e41
JB		 3772
3773 /*
3774 * Most likely AP is not in the range so remove the
3775 * bss struct for that AP.
3776 */
3777 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3778
3779 return -ETIMEDOUT;
3780 }
3781
bdcbd8e0
JB		 3782 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3783 assoc_data->bss->bssid, assoc_data->tries,
3784 IEEE80211_ASSOC_MAX_TRIES);
66e67e41
JB		 3785 ieee80211_send_assoc(sdata);
3786
30686bf7 3787 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
1672c0e3 3788 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
89afe614 3789 assoc_data->timeout_started = true;
8d61ffa5 3790 run_again(sdata, assoc_data->timeout);
89afe614 3791 } else {
cb236d2d
JB		 3792 assoc_data->timeout =
3793 round_jiffies_up(jiffies +
3794 IEEE80211_ASSOC_TIMEOUT_LONG);
3795 assoc_data->timeout_started = true;
3796 run_again(sdata, assoc_data->timeout);
1672c0e3 3797 }
66e67e41
JB		 3798
3799 return 0;
3800}
3801
1672c0e3
JB		 3802void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3803 __le16 fc, bool acked)
3804{
3805 struct ieee80211_local *local = sdata->local;
3806
3807 sdata->u.mgd.status_fc = fc;
3808 sdata->u.mgd.status_acked = acked;
3809 sdata->u.mgd.status_received = true;
3810
3811 ieee80211_queue_work(&local->hw, &sdata->work);
3812}
3813
1fa57d01 3814void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 3815{
9c6bd790 3816 struct ieee80211_local *local = sdata->local;
1fa57d01 3817 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 3818
8d61ffa5 3819 sdata_lock(sdata);
77fdaa12 3820
1672c0e3
JB		 3821 if (ifmgd->status_received) {
3822 __le16 fc = ifmgd->status_fc;
3823 bool status_acked = ifmgd->status_acked;
3824
3825 ifmgd->status_received = false;
46cad4b7 3826 if (ifmgd->auth_data && ieee80211_is_auth(fc)) {
1672c0e3
JB		 3827 if (status_acked) {
3828 ifmgd->auth_data->timeout =
3829 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
8d61ffa5 3830 run_again(sdata, ifmgd->auth_data->timeout);
1672c0e3
JB		 3831 } else {
3832 ifmgd->auth_data->timeout = jiffies - 1;
3833 }
89afe614 3834 ifmgd->auth_data->timeout_started = true;
1672c0e3
JB		 3835 } else if (ifmgd->assoc_data &&
3836 (ieee80211_is_assoc_req(fc) ||
3837 ieee80211_is_reassoc_req(fc))) {
3838 if (status_acked) {
3839 ifmgd->assoc_data->timeout =
3840 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
8d61ffa5 3841 run_again(sdata, ifmgd->assoc_data->timeout);
1672c0e3
JB		 3842 } else {
3843 ifmgd->assoc_data->timeout = jiffies - 1;
3844 }
89afe614 3845 ifmgd->assoc_data->timeout_started = true;
1672c0e3
JB		 3846 }
3847 }
3848
89afe614 3849 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
66e67e41
JB		 3850 time_after(jiffies, ifmgd->auth_data->timeout)) {
3851 if (ifmgd->auth_data->done) {
3852 /*
3853 * ok ... we waited for assoc but userspace didn't,
3854 * so let's just kill the auth data
3855 */
3856 ieee80211_destroy_auth_data(sdata, false);
46cad4b7 3857 } else if (ieee80211_auth(sdata)) {
66e67e41 3858 u8 bssid[ETH_ALEN];
a9409093
EG		 3859 struct ieee80211_event event = {
3860 .type = MLME_EVENT,
3861 .u.mlme.data = AUTH_EVENT,
3862 .u.mlme.status = MLME_TIMEOUT,
3863 };
66e67e41
JB		 3864
3865 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3866
3867 ieee80211_destroy_auth_data(sdata, false);
3868
6ff57cf8 3869 cfg80211_auth_timeout(sdata->dev, bssid);
a9409093 3870 drv_event_callback(sdata->local, sdata, &event);
66e67e41 3871 }
89afe614 3872 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
8d61ffa5 3873 run_again(sdata, ifmgd->auth_data->timeout);
66e67e41 3874
89afe614 3875 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
66e67e41 3876 time_after(jiffies, ifmgd->assoc_data->timeout)) {
989c6505 3877 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
66e67e41 3878 ieee80211_do_assoc(sdata)) {
959867fa 3879 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
d0d1a12f
EG		 3880 struct ieee80211_event event = {
3881 .type = MLME_EVENT,
3882 .u.mlme.data = ASSOC_EVENT,
3883 .u.mlme.status = MLME_TIMEOUT,
3884 };
66e67e41
JB		 3885
3886 ieee80211_destroy_assoc_data(sdata, false);
959867fa 3887 cfg80211_assoc_timeout(sdata->dev, bss);
d0d1a12f 3888 drv_event_callback(sdata->local, sdata, &event);
66e67e41 3889 }
89afe614 3890 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
8d61ffa5 3891 run_again(sdata, ifmgd->assoc_data->timeout);
66e67e41 3892
392b9ffb 3893 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
b291ba11 3894 ifmgd->associated) {
a43abf29 3895 u8 bssid[ETH_ALEN];
72a8a3ed 3896 int max_tries;
a43abf29 3897
0c1ad2ca 3898 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 3899
30686bf7 3900 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
180205bd 3901 max_tries = max_nullfunc_tries;
72a8a3ed 3902 else
180205bd 3903 max_tries = max_probe_tries;
72a8a3ed 3904
4e5ff376
FF		 3905 /* ACK received for nullfunc probing frame */
3906 if (!ifmgd->probe_send_count)
3907 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 3908 else if (ifmgd->nullfunc_failed) {
3909 if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3910 mlme_dbg(sdata,
3911 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3912 bssid, ifmgd->probe_send_count,
3913 max_tries);
04ac3c0e
FF		 3914 ieee80211_mgd_probe_ap_send(sdata);
3915 } else {
bdcbd8e0
JB		 3916 mlme_dbg(sdata,
3917 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3918 bssid);
95acac61 3919 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1
JB		 3920 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3921 false);
04ac3c0e
FF		 3922 }
3923 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
8d61ffa5 3924 run_again(sdata, ifmgd->probe_timeout);
30686bf7 3925 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
bdcbd8e0
JB		 3926 mlme_dbg(sdata,
3927 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3928 bssid, probe_wait_ms);
95acac61 3929 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 3930 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
04ac3c0e 3931 } else if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3932 mlme_dbg(sdata,
3933 "No probe response from AP %pM after %dms, try %d/%i\n",
3934 bssid, probe_wait_ms,
3935 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 3936 ieee80211_mgd_probe_ap_send(sdata);
3937 } else {
b291ba11
JB		 3938 /*
3939 * We actually lost the connection ... or did we?
3940 * Let's make sure!
3941 */
b38afa87
BG		 3942 wiphy_debug(local->hw.wiphy,
3943 "%s: No probe response from AP %pM"
3944 " after %dms, disconnecting.\n",
3945 sdata->name,
180205bd 3946 bssid, probe_wait_ms);
04ac3c0e 3947
95acac61 3948 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 3949 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
b291ba11
JB		 3950 }
3951 }
3952
8d61ffa5 3953 sdata_unlock(sdata);
f0706e82
JB		 3954}
3955
b291ba11
JB		 3956static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3957{
3958 struct ieee80211_sub_if_data *sdata =
3959 (struct ieee80211_sub_if_data *) data;
0c21e632 3960 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 3961
0c21e632 3962 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
e5593f56
MK		 3963 return;
3964
682bd38b 3965 sdata->u.mgd.connection_loss = false;
1e4dcd01
JO		 3966 ieee80211_queue_work(&sdata->local->hw,
3967 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 3968}
3969
3970static void ieee80211_sta_conn_mon_timer(unsigned long data)
3971{
3972 struct ieee80211_sub_if_data *sdata =
3973 (struct ieee80211_sub_if_data *) data;
3974 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3975 struct ieee80211_local *local = sdata->local;
3976
0c21e632 3977 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
e5593f56
MK		 3978 return;
3979
42935eca 3980 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 3981}
3982
3983static void ieee80211_sta_monitor_work(struct work_struct *work)
3984{
3985 struct ieee80211_sub_if_data *sdata =
3986 container_of(work, struct ieee80211_sub_if_data,
3987 u.mgd.monitor_work);
3988
3989 ieee80211_mgd_probe_ap(sdata, false);
3990}
3991
9c6bd790
JB		 3992static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3993{
ad935687 3994 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
925e64c3 3995 __ieee80211_stop_poll(sdata);
ad935687 3996
b291ba11 3997 /* let's probe the connection once */
30686bf7 3998 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
494f1fe5
EP		 3999 ieee80211_queue_work(&sdata->local->hw,
4000 &sdata->u.mgd.monitor_work);
b291ba11 4001 /* and do all the other regular work too */
64592c8f 4002 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 4003 }
9c6bd790 4004}
f0706e82 4005
b8360ab8 4006#ifdef CONFIG_PM
1a1cb744
JB		 4007void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
4008{
4009 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4010 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4011
4012 sdata_lock(sdata);
4013
c52666ae
EG		 4014 if (ifmgd->auth_data || ifmgd->assoc_data) {
4015 const u8 *bssid = ifmgd->auth_data ?
4016 ifmgd->auth_data->bss->bssid :
4017 ifmgd->assoc_data->bss->bssid;
4018
1a1cb744 4019 /*
c52666ae
EG		 4020 * If we are trying to authenticate / associate while suspending,
4021 * cfg80211 won't know and won't actually abort those attempts,
4022 * thus we need to do that ourselves.
1a1cb744 4023 */
c52666ae 4024 ieee80211_send_deauth_disassoc(sdata, bssid,
1a1cb744
JB		 4025 IEEE80211_STYPE_DEAUTH,
4026 WLAN_REASON_DEAUTH_LEAVING,
4027 false, frame_buf);
c52666ae
EG		 4028 if (ifmgd->assoc_data)
4029 ieee80211_destroy_assoc_data(sdata, false);
4030 if (ifmgd->auth_data)
4031 ieee80211_destroy_auth_data(sdata, false);
1a1cb744
JB		 4032 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4033 IEEE80211_DEAUTH_FRAME_LEN);
4034 }
4035
be72afe0
JB		 4036 /* This is a bit of a hack - we should find a better and more generic
4037 * solution to this. Normally when suspending, cfg80211 will in fact
4038 * deauthenticate. However, it doesn't (and cannot) stop an ongoing
4039 * auth (not so important) or assoc (this is the problem) process.
4040 *
4041 * As a consequence, it can happen that we are in the process of both
4042 * associating and suspending, and receive an association response
4043 * after cfg80211 has checked if it needs to disconnect, but before
4044 * we actually set the flag to drop incoming frames. This will then
4045 * cause the workqueue flush to process the association response in
4046 * the suspend, resulting in a successful association just before it
4047 * tries to remove the interface from the driver, which now though
4048 * has a channel context assigned ... this results in issues.
4049 *
4050 * To work around this (for now) simply deauth here again if we're
4051 * now connected.
4052 */
4053 if (ifmgd->associated && !sdata->local->wowlan) {
4054 u8 bssid[ETH_ALEN];
4055 struct cfg80211_deauth_request req = {
4056 .reason_code = WLAN_REASON_DEAUTH_LEAVING,
4057 .bssid = bssid,
4058 };
4059
4060 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4061 ieee80211_mgd_deauth(sdata, &req);
4062 }
4063
1a1cb744
JB		 4064 sdata_unlock(sdata);
4065}
4066
b8360ab8
JB		 4067void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
4068{
4069 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4070
8d61ffa5 4071 sdata_lock(sdata);
b8360ab8 4072 if (!ifmgd->associated) {
8d61ffa5 4073 sdata_unlock(sdata);
b8360ab8
JB		 4074 return;
4075 }
4076
4077 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
4078 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
4079 mlme_dbg(sdata, "driver requested disconnect after resume\n");
4080 ieee80211_sta_connection_lost(sdata,
4081 ifmgd->associated->bssid,
4082 WLAN_REASON_UNSPECIFIED,
4083 true);
8d61ffa5 4084 sdata_unlock(sdata);
b8360ab8
JB		 4085 return;
4086 }
8d61ffa5 4087 sdata_unlock(sdata);
b8360ab8
JB		 4088}
4089#endif
4090
9c6bd790
JB		 4091/* interface setup */
4092void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 4093{
46900298 4094 struct ieee80211_if_managed *ifmgd;
988c0f72 4095
46900298 4096 ifmgd = &sdata->u.mgd;
b291ba11 4097 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 4098 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 4099 INIT_WORK(&ifmgd->beacon_connection_loss_work,
4100 ieee80211_beacon_connection_loss_work);
882a7c69
JB		 4101 INIT_WORK(&ifmgd->csa_connection_drop_work,
4102 ieee80211_csa_connection_drop_work);
687da132 4103 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
81dd2b88
AN		 4104 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
4105 ieee80211_tdls_peer_del_work);
46900298 4106 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 4107 (unsigned long) sdata);
b291ba11
JB		 4108 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
4109 (unsigned long) sdata);
4110 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
4111 (unsigned long) sdata);
46900298 4112 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 4113 (unsigned long) sdata);
02219b3a
JB		 4114 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
4115 ieee80211_sta_handle_tspec_ac_params_wk);
9c6bd790 4116
ab1faead 4117 ifmgd->flags = 0;
1478acb3 4118 ifmgd->powersave = sdata->wdev.ps;
219c3867
AB		 4119 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
4120 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
67baf663 4121 ifmgd->p2p_noa_index = -1;
bbbdff9e 4122
0d8614b4 4123 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
0f78231b
JB		 4124 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
4125 else
4126 ifmgd->req_smps = IEEE80211_SMPS_OFF;
1277b4a9
LK		 4127
4128 /* Setup TDLS data */
4129 spin_lock_init(&ifmgd->teardown_lock);
4130 ifmgd->teardown_skb = NULL;
4131 ifmgd->orig_teardown_skb = NULL;
f0706e82
JB		 4132}
4133
77fdaa12
JB		 4134/* scan finished notification */
4135void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 4136{
31ee67a1 4137 struct ieee80211_sub_if_data *sdata;
60f8b39c 4138
77fdaa12
JB		 4139 /* Restart STA timers */
4140 rcu_read_lock();
370bd005
BG		 4141 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4142 if (ieee80211_sdata_running(sdata))
4143 ieee80211_restart_sta_timer(sdata);
4144 }
77fdaa12
JB		 4145 rcu_read_unlock();
4146}
60f8b39c 4147
f2d9d270
JB		 4148static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
4149 struct cfg80211_bss *cbss)
4150{
4151 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4152 const u8 *ht_cap_ie, *vht_cap_ie;
4153 const struct ieee80211_ht_cap *ht_cap;
4154 const struct ieee80211_vht_cap *vht_cap;
4155 u8 chains = 1;
4156
4157 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
4158 return chains;
4159
9caf0364 4160 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
f2d9d270
JB		 4161 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
4162 ht_cap = (void *)(ht_cap_ie + 2);
4163 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4164 /*
4165 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4166 * "Tx Unequal Modulation Supported" fields.
4167 */
4168 }
4169
4170 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
4171 return chains;
4172
9caf0364 4173 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
f2d9d270
JB		 4174 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
4175 u8 nss;
4176 u16 tx_mcs_map;
4177
4178 vht_cap = (void *)(vht_cap_ie + 2);
4179 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4180 for (nss = 8; nss > 0; nss--) {
4181 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4182 IEEE80211_VHT_MCS_NOT_SUPPORTED)
4183 break;
4184 }
4185 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4186 chains = max(chains, nss);
4187 }
4188
4189 return chains;
4190}
4191
b17166a7
JB		 4192static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4193 struct cfg80211_bss *cbss)
a1cf775d
JB		 4194{
4195 struct ieee80211_local *local = sdata->local;
4196 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
53b954ee 4197 const struct ieee80211_ht_cap *ht_cap = NULL;
24398e39 4198 const struct ieee80211_ht_operation *ht_oper = NULL;
f2d9d270 4199 const struct ieee80211_vht_operation *vht_oper = NULL;
24398e39 4200 struct ieee80211_supported_band *sband;
4bf88530 4201 struct cfg80211_chan_def chandef;
f2d9d270 4202 int ret;
52a45f38
AN		 4203 u32 i;
4204 bool have_80mhz;
a1cf775d 4205
24398e39
JB		 4206 sband = local->hw.wiphy->bands[cbss->channel->band];
4207
f2d9d270
JB		 4208 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
4209 IEEE80211_STA_DISABLE_80P80MHZ |
4210 IEEE80211_STA_DISABLE_160MHZ);
4211
9caf0364
JB		 4212 rcu_read_lock();
4213
f2d9d270
JB		 4214 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
4215 sband->ht_cap.ht_supported) {
53b954ee 4216 const u8 *ht_oper_ie, *ht_cap_ie;
24398e39 4217
9caf0364 4218 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
24398e39
JB		 4219 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
4220 ht_oper = (void *)(ht_oper_ie + 2);
08e6effa 4221
53b954ee
EP		 4222 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4223 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
4224 ht_cap = (void *)(ht_cap_ie + 2);
4225
4226 if (!ht_cap) {
08e6effa
JB		 4227 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4228 ht_oper = NULL;
4229 }
24398e39
JB		 4230 }
4231
f2d9d270
JB		 4232 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4233 sband->vht_cap.vht_supported) {
08e6effa 4234 const u8 *vht_oper_ie, *vht_cap;
f2d9d270 4235
9caf0364
JB		 4236 vht_oper_ie = ieee80211_bss_get_ie(cbss,
4237 WLAN_EID_VHT_OPERATION);
f2d9d270
JB		 4238 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
4239 vht_oper = (void *)(vht_oper_ie + 2);
4240 if (vht_oper && !ht_oper) {
4241 vht_oper = NULL;
bdcbd8e0 4242 sdata_info(sdata,
f2d9d270 4243 "AP advertised VHT without HT, disabling both\n");
cb145022
JB		 4244 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4245 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
24398e39 4246 }
08e6effa
JB		 4247
4248 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4249 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
4250 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4251 vht_oper = NULL;
4252 }
24398e39
JB		 4253 }
4254
52a45f38
AN		 4255 /* Allow VHT if at least one channel on the sband supports 80 MHz */
4256 have_80mhz = false;
4257 for (i = 0; i < sband->n_channels; i++) {
4258 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
4259 IEEE80211_CHAN_NO_80MHZ))
4260 continue;
4261
4262 have_80mhz = true;
4263 break;
4264 }
4265
4266 if (!have_80mhz)
4267 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4268
f2d9d270
JB		 4269 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
4270 cbss->channel,
53b954ee 4271 ht_cap, ht_oper, vht_oper,
5cdaed1e 4272 &chandef, false);
04ecd257 4273
f2d9d270
JB		 4274 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
4275 local->rx_chains);
24398e39 4276
9caf0364
JB		 4277 rcu_read_unlock();
4278
04ecd257
JB		 4279 /* will change later if needed */
4280 sdata->smps_mode = IEEE80211_SMPS_OFF;
4281
34a3740d 4282 mutex_lock(&local->mtx);
f2d9d270
JB		 4283 /*
4284 * If this fails (possibly due to channel context sharing
4285 * on incompatible channels, e.g. 80+80 and 160 sharing the
4286 * same control channel) try to use a smaller bandwidth.
4287 */
4288 ret = ieee80211_vif_use_channel(sdata, &chandef,
4289 IEEE80211_CHANCTX_SHARED);
0418a445
SW		 4290
4291 /* don't downgrade for 5 and 10 MHz channels, though. */
4292 if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4293 chandef.width == NL80211_CHAN_WIDTH_10)
34a3740d 4294 goto out;
0418a445 4295
d601cd8d 4296 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
e6b7cde4 4297 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
d601cd8d
JB		 4298 ret = ieee80211_vif_use_channel(sdata, &chandef,
4299 IEEE80211_CHANCTX_SHARED);
4300 }
34a3740d
JB		 4301 out:
4302 mutex_unlock(&local->mtx);
f2d9d270 4303 return ret;
b17166a7
JB		 4304}
4305
4306static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
c1041f10
CRI		 4307 struct cfg80211_bss *cbss, bool assoc,
4308 bool override)
b17166a7
JB		 4309{
4310 struct ieee80211_local *local = sdata->local;
4311 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4312 struct ieee80211_bss *bss = (void *)cbss->priv;
4313 struct sta_info *new_sta = NULL;
179b8fc7 4314 struct ieee80211_supported_band *sband;
c1041f10 4315 bool have_sta = false;
b17166a7
JB		 4316 int err;
4317
179b8fc7
CRI		 4318 sband = local->hw.wiphy->bands[cbss->channel->band];
4319
b17166a7
JB		 4320 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
4321 return -EINVAL;
4322
4323 if (assoc) {
4324 rcu_read_lock();
4325 have_sta = sta_info_get(sdata, cbss->bssid);
4326 rcu_read_unlock();
4327 }
4328
4329 if (!have_sta) {
4330 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4331 if (!new_sta)
4332 return -ENOMEM;
4333 }
179b8fc7 4334
c1041f10 4335 if (new_sta || override) {
179b8fc7
CRI		 4336 err = ieee80211_prep_channel(sdata, cbss);
4337 if (err) {
4338 if (new_sta)
4339 sta_info_free(local, new_sta);
4340 return -EINVAL;
4341 }
4342 }
4343
13e0c8e3 4344 if (new_sta) {
5d6a1b06
JB		 4345 u32 rates = 0, basic_rates = 0;
4346 bool have_higher_than_11mbit;
4347 int min_rate = INT_MAX, min_rate_index = -1;
2103dec1 4348 struct ieee80211_chanctx_conf *chanctx_conf;
8cef2c9d 4349 const struct cfg80211_bss_ies *ies;
179b8fc7 4350 int shift = ieee80211_vif_get_shift(&sdata->vif);
2103dec1 4351 u32 rate_flags;
b17166a7 4352
2103dec1
SW		 4353 rcu_read_lock();
4354 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4355 if (WARN_ON(!chanctx_conf)) {
4356 rcu_read_unlock();
c368ddaa 4357 sta_info_free(local, new_sta);
2103dec1
SW		 4358 return -EINVAL;
4359 }
4360 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
4361 rcu_read_unlock();
5d6a1b06 4362
5d6a1b06
JB		 4363 ieee80211_get_rates(sband, bss->supp_rates,
4364 bss->supp_rates_len,
4365 &rates, &basic_rates,
4366 &have_higher_than_11mbit,
2103dec1
SW		 4367 &min_rate, &min_rate_index,
4368 shift, rate_flags);
5d6a1b06
JB		 4369
4370 /*
4371 * This used to be a workaround for basic rates missing
4372 * in the association response frame. Now that we no
4373 * longer use the basic rates from there, it probably
4374 * doesn't happen any more, but keep the workaround so
4375 * in case some *other* APs are buggy in different ways
4376 * we can connect -- with a warning.
4377 */
4378 if (!basic_rates && min_rate_index >= 0) {
bdcbd8e0
JB		 4379 sdata_info(sdata,
4380 "No basic rates, using min rate instead\n");
5d6a1b06
JB		 4381 basic_rates = BIT(min_rate_index);
4382 }
4383
13e0c8e3 4384 new_sta->sta.supp_rates[cbss->channel->band] = rates;
5d6a1b06
JB		 4385 sdata->vif.bss_conf.basic_rates = basic_rates;
4386
4387 /* cf. IEEE 802.11 9.2.12 */
55de908a 4388 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
5d6a1b06
JB		 4389 have_higher_than_11mbit)
4390 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
4391 else
4392 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
4393
4394 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
4395
8c358bcd
JB		 4396 /* set timing information */
4397 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
8cef2c9d 4398 rcu_read_lock();
ef429dad
JB		 4399 ies = rcu_dereference(cbss->beacon_ies);
4400 if (ies) {
4401 const u8 *tim_ie;
4402
4403 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4404 sdata->vif.bss_conf.sync_device_ts =
4405 bss->device_ts_beacon;
4406 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4407 ies->data, ies->len);
4408 if (tim_ie && tim_ie[1] >= 2)
4409 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
4410 else
4411 sdata->vif.bss_conf.sync_dtim_count = 0;
30686bf7
JB		 4412 } else if (!ieee80211_hw_check(&sdata->local->hw,
4413 TIMING_BEACON_ONLY)) {
ef429dad
JB		 4414 ies = rcu_dereference(cbss->proberesp_ies);
4415 /* must be non-NULL since beacon IEs were NULL */
4416 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4417 sdata->vif.bss_conf.sync_device_ts =
4418 bss->device_ts_presp;
4419 sdata->vif.bss_conf.sync_dtim_count = 0;
4420 } else {
4421 sdata->vif.bss_conf.sync_tsf = 0;
4422 sdata->vif.bss_conf.sync_device_ts = 0;
4423 sdata->vif.bss_conf.sync_dtim_count = 0;
4424 }
8cef2c9d 4425 rcu_read_unlock();
8c358bcd
JB		 4426
4427 /* tell driver about BSSID, basic rates and timing */
5d6a1b06 4428 ieee80211_bss_info_change_notify(sdata,
8c358bcd
JB		 4429 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4430 BSS_CHANGED_BEACON_INT);
a1cf775d
JB		 4431
4432 if (assoc)
13e0c8e3 4433 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
a1cf775d 4434
13e0c8e3
JB		 4435 err = sta_info_insert(new_sta);
4436 new_sta = NULL;
a1cf775d 4437 if (err) {
bdcbd8e0
JB		 4438 sdata_info(sdata,
4439 "failed to insert STA entry for the AP (error %d)\n",
4440 err);
a1cf775d
JB		 4441 return err;
4442 }
4443 } else
b203ca39 4444 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
a1cf775d 4445
7d830a19
DS		 4446 /* Cancel scan to ensure that nothing interferes with connection */
4447 if (local->scanning)
4448 ieee80211_scan_cancel(local);
4449
a1cf775d
JB		 4450 return 0;
4451}
4452
77fdaa12
JB		 4453/* config hooks */
4454int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4455 struct cfg80211_auth_request *req)
9c6bd790 4456{
66e67e41
JB		 4457 struct ieee80211_local *local = sdata->local;
4458 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4459 struct ieee80211_mgd_auth_data *auth_data;
77fdaa12 4460 u16 auth_alg;
66e67e41
JB		 4461 int err;
4462
4463 /* prepare auth data structure */
9c6bd790 4464
77fdaa12
JB		 4465 switch (req->auth_type) {
4466 case NL80211_AUTHTYPE_OPEN_SYSTEM:
4467 auth_alg = WLAN_AUTH_OPEN;
4468 break;
4469 case NL80211_AUTHTYPE_SHARED_KEY:
66e67e41 4470 if (IS_ERR(local->wep_tx_tfm))
9dca9c49 4471 return -EOPNOTSUPP;
77fdaa12
JB		 4472 auth_alg = WLAN_AUTH_SHARED_KEY;
4473 break;
4474 case NL80211_AUTHTYPE_FT:
4475 auth_alg = WLAN_AUTH_FT;
4476 break;
4477 case NL80211_AUTHTYPE_NETWORK_EAP:
4478 auth_alg = WLAN_AUTH_LEAP;
4479 break;
6b8ece3a
JM		 4480 case NL80211_AUTHTYPE_SAE:
4481 auth_alg = WLAN_AUTH_SAE;
4482 break;
77fdaa12
JB		 4483 default:
4484 return -EOPNOTSUPP;
60f8b39c 4485 }
77fdaa12 4486
6b8ece3a
JM		 4487 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
4488 req->ie_len, GFP_KERNEL);
66e67e41 4489 if (!auth_data)
9c6bd790 4490 return -ENOMEM;
77fdaa12 4491
66e67e41 4492 auth_data->bss = req->bss;
77fdaa12 4493
6b8ece3a
JM		 4494 if (req->sae_data_len >= 4) {
4495 __le16 *pos = (__le16 *) req->sae_data;
4496 auth_data->sae_trans = le16_to_cpu(pos[0]);
4497 auth_data->sae_status = le16_to_cpu(pos[1]);
4498 memcpy(auth_data->data, req->sae_data + 4,
4499 req->sae_data_len - 4);
4500 auth_data->data_len += req->sae_data_len - 4;
4501 }
4502
77fdaa12 4503 if (req->ie && req->ie_len) {
6b8ece3a
JM		 4504 memcpy(&auth_data->data[auth_data->data_len],
4505 req->ie, req->ie_len);
4506 auth_data->data_len += req->ie_len;
9c6bd790 4507 }
77fdaa12 4508
fffd0934 4509 if (req->key && req->key_len) {
66e67e41
JB		 4510 auth_data->key_len = req->key_len;
4511 auth_data->key_idx = req->key_idx;
4512 memcpy(auth_data->key, req->key, req->key_len);
fffd0934
JB		 4513 }
4514
66e67e41 4515 auth_data->algorithm = auth_alg;
60f8b39c 4516
66e67e41 4517 /* try to authenticate/probe */
2a33bee2 4518
66e67e41
JB		 4519 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4520 ifmgd->assoc_data) {
4521 err = -EBUSY;
4522 goto err_free;
2a33bee2
GE		 4523 }
4524
66e67e41
JB		 4525 if (ifmgd->auth_data)
4526 ieee80211_destroy_auth_data(sdata, false);
2a33bee2 4527
66e67e41
JB		 4528 /* prep auth_data so we don't go into idle on disassoc */
4529 ifmgd->auth_data = auth_data;
af6b6374 4530
7b119dc0
JB		 4531 if (ifmgd->associated) {
4532 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4533
4534 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4535 WLAN_REASON_UNSPECIFIED,
4536 false, frame_buf);
4537
a90faa9d
EG		 4538 ieee80211_report_disconnect(sdata, frame_buf,
4539 sizeof(frame_buf), true,
4540 WLAN_REASON_UNSPECIFIED);
7b119dc0 4541 }
af6b6374 4542
bdcbd8e0 4543 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
e5b900d2 4544
c1041f10 4545 err = ieee80211_prep_connection(sdata, req->bss, false, false);
a1cf775d 4546 if (err)
66e67e41 4547 goto err_clear;
af6b6374 4548
46cad4b7 4549 err = ieee80211_auth(sdata);
66e67e41 4550 if (err) {
66e67e41
JB		 4551 sta_info_destroy_addr(sdata, req->bss->bssid);
4552 goto err_clear;
4553 }
4554
4555 /* hold our own reference */
5b112d3d 4556 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
8d61ffa5 4557 return 0;
66e67e41
JB		 4558
4559 err_clear:
c84a67a2 4560 eth_zero_addr(ifmgd->bssid);
3d2abdfd 4561 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41 4562 ifmgd->auth_data = NULL;
d01f858c
MK		 4563 mutex_lock(&sdata->local->mtx);
4564 ieee80211_vif_release_channel(sdata);
4565 mutex_unlock(&sdata->local->mtx);
66e67e41
JB		 4566 err_free:
4567 kfree(auth_data);
66e67e41 4568 return err;
af6b6374
JB		 4569}
4570
77fdaa12
JB		 4571int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4572 struct cfg80211_assoc_request *req)
f0706e82 4573{
66e67e41 4574 struct ieee80211_local *local = sdata->local;
77fdaa12 4575 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 4576 struct ieee80211_bss *bss = (void *)req->bss->priv;
66e67e41 4577 struct ieee80211_mgd_assoc_data *assoc_data;
c65dd147 4578 const struct cfg80211_bss_ies *beacon_ies;
4e74bfdb 4579 struct ieee80211_supported_band *sband;
b08fbbd8 4580 const u8 *ssidie, *ht_ie, *vht_ie;
2a33bee2 4581 int i, err;
c1041f10 4582 bool override = false;
f0706e82 4583
66e67e41
JB		 4584 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4585 if (!assoc_data)
4586 return -ENOMEM;
4587
9caf0364
JB		 4588 rcu_read_lock();
4589 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4590 if (!ssidie) {
4591 rcu_read_unlock();
4592 kfree(assoc_data);
4593 return -EINVAL;
4594 }
4595 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4596 assoc_data->ssid_len = ssidie[1];
4597 rcu_read_unlock();
4598
7b119dc0
JB		 4599 if (ifmgd->associated) {
4600 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4601
4602 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4603 WLAN_REASON_UNSPECIFIED,
4604 false, frame_buf);
4605
a90faa9d
EG		 4606 ieee80211_report_disconnect(sdata, frame_buf,
4607 sizeof(frame_buf), true,
4608 WLAN_REASON_UNSPECIFIED);
7b119dc0 4609 }
66e67e41
JB		 4610
4611 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4612 err = -EBUSY;
4613 goto err_free;
af6b6374 4614 }
77fdaa12 4615
66e67e41
JB		 4616 if (ifmgd->assoc_data) {
4617 err = -EBUSY;
4618 goto err_free;
4619 }
77fdaa12 4620
66e67e41
JB		 4621 if (ifmgd->auth_data) {
4622 bool match;
4623
4624 /* keep sta info, bssid if matching */
b203ca39 4625 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
66e67e41 4626 ieee80211_destroy_auth_data(sdata, match);
2a33bee2
GE		 4627 }
4628
66e67e41 4629 /* prepare assoc data */
095d81ce 4630
d8ec4433
JO		 4631 ifmgd->beacon_crc_valid = false;
4632
095d81ce
JB		 4633 assoc_data->wmm = bss->wmm_used &&
4634 (local->hw.queues >= IEEE80211_NUM_ACS);
095d81ce 4635
de5036aa
JB		 4636 /*
4637 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4638 * We still associate in non-HT mode (11a/b/g) if any one of these
4639 * ciphers is configured as pairwise.
4640 * We can set this to true for non-11n hardware, that'll be checked
4641 * separately along with the peer capabilities.
4642 */
1c4cb928 4643 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
77fdaa12
JB		 4644 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4645 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
1c4cb928 4646 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
a8243b72 4647 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
d545daba 4648 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
1c4cb928 4649 netdev_info(sdata->dev,
d545daba 4650 "disabling HT/VHT due to WEP/TKIP use\n");
1c4cb928
JB		 4651 }
4652 }
77fdaa12 4653
4e74bfdb
JB		 4654 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4655 sband = local->hw.wiphy->bands[req->bss->channel->band];
4656 if (!sband->ht_cap.ht_supported ||
095d81ce
JB		 4657 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4658 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
a8243b72 4659 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
095d81ce
JB		 4660 if (!bss->wmm_used &&
4661 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
1b49de26
JB		 4662 netdev_info(sdata->dev,
4663 "disabling HT as WMM/QoS is not supported by the AP\n");
1c4cb928 4664 }
4e74bfdb 4665
d545daba
MP		 4666 /* disable VHT if we don't support it or the AP doesn't use WMM */
4667 if (!sband->vht_cap.vht_supported ||
095d81ce
JB		 4668 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4669 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
d545daba 4670 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
095d81ce
JB		 4671 if (!bss->wmm_used &&
4672 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
1b49de26
JB		 4673 netdev_info(sdata->dev,
4674 "disabling VHT as WMM/QoS is not supported by the AP\n");
d545daba
MP		 4675 }
4676
ef96a842
BG		 4677 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4678 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4679 sizeof(ifmgd->ht_capa_mask));
4680
dd5ecfea
JB		 4681 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4682 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4683 sizeof(ifmgd->vht_capa_mask));
4684
77fdaa12 4685 if (req->ie && req->ie_len) {
66e67e41
JB		 4686 memcpy(assoc_data->ie, req->ie, req->ie_len);
4687 assoc_data->ie_len = req->ie_len;
4688 }
f679f65d 4689
66e67e41 4690 assoc_data->bss = req->bss;
f679f65d 4691
af6b6374
JB		 4692 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4693 if (ifmgd->powersave)
04ecd257 4694 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
af6b6374 4695 else
04ecd257 4696 sdata->smps_mode = IEEE80211_SMPS_OFF;
af6b6374 4697 } else
04ecd257 4698 sdata->smps_mode = ifmgd->req_smps;
af6b6374 4699
66e67e41 4700 assoc_data->capability = req->bss->capability;
66e67e41
JB		 4701 assoc_data->supp_rates = bss->supp_rates;
4702 assoc_data->supp_rates_len = bss->supp_rates_len;
9dde6423 4703
9caf0364 4704 rcu_read_lock();
9dde6423
JB		 4705 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4706 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4707 assoc_data->ap_ht_param =
4708 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4709 else
a8243b72 4710 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
b08fbbd8
JB		 4711 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4712 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4713 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4714 sizeof(struct ieee80211_vht_cap));
4715 else
4716 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
9caf0364 4717 rcu_read_unlock();
63f170e0 4718
848955cc 4719 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
30686bf7 4720 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK),
848955cc
JB		 4721 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
4722 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
4723
ab13315a 4724 if (bss->wmm_used && bss->uapsd_supported &&
848955cc 4725 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
76f0303d 4726 assoc_data->uapsd = true;
ab13315a
KV		 4727 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4728 } else {
76f0303d 4729 assoc_data->uapsd = false;
ab13315a
KV		 4730 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4731 }
4732
77fdaa12 4733 if (req->prev_bssid)
66e67e41 4734 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12
JB		 4735
4736 if (req->use_mfp) {
4737 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4738 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4739 } else {
4740 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4741 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4742 }
4743
cd2f5dd7
AK		 4744 if (req->flags & ASSOC_REQ_USE_RRM)
4745 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
4746 else
4747 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
4748
77fdaa12
JB		 4749 if (req->crypto.control_port)
4750 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4751 else
4752 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4753
a621fa4d
JB		 4754 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4755 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
2475b1cc
MS		 4756 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
4757 sdata->vif.type);
a621fa4d 4758
66e67e41
JB		 4759 /* kick off associate process */
4760
4761 ifmgd->assoc_data = assoc_data;
826262c3 4762 ifmgd->dtim_period = 0;
989c6505 4763 ifmgd->have_beacon = false;
66e67e41 4764
c1041f10
CRI		 4765 /* override HT/VHT configuration only if the AP and we support it */
4766 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
4767 struct ieee80211_sta_ht_cap sta_ht_cap;
4768
4769 if (req->flags & ASSOC_REQ_DISABLE_HT)
4770 override = true;
4771
4772 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
4773 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
4774
4775 /* check for 40 MHz disable override */
4776 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) &&
4777 sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
4778 !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
4779 override = true;
4780
4781 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4782 req->flags & ASSOC_REQ_DISABLE_VHT)
4783 override = true;
4784 }
4785
4786 if (req->flags & ASSOC_REQ_DISABLE_HT) {
4787 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4788 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4789 }
4790
4791 if (req->flags & ASSOC_REQ_DISABLE_VHT)
4792 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4793
4794 err = ieee80211_prep_connection(sdata, req->bss, true, override);
a1cf775d
JB		 4795 if (err)
4796 goto err_clear;
66e67e41 4797
c65dd147
EG		 4798 rcu_read_lock();
4799 beacon_ies = rcu_dereference(req->bss->beacon_ies);
826262c3 4800
30686bf7 4801 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) &&
c65dd147
EG		 4802 !beacon_ies) {
4803 /*
4804 * Wait up to one beacon interval ...
4805 * should this be more if we miss one?
4806 */
4807 sdata_info(sdata, "waiting for beacon from %pM\n",
4808 ifmgd->bssid);
4809 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
89afe614 4810 assoc_data->timeout_started = true;
c65dd147
EG		 4811 assoc_data->need_beacon = true;
4812 } else if (beacon_ies) {
4813 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4814 beacon_ies->data,
4815 beacon_ies->len);
ef429dad
JB		 4816 u8 dtim_count = 0;
4817
c65dd147
EG		 4818 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4819 const struct ieee80211_tim_ie *tim;
4820 tim = (void *)(tim_ie + 2);
4821 ifmgd->dtim_period = tim->dtim_period;
ef429dad 4822 dtim_count = tim->dtim_count;
826262c3 4823 }
989c6505 4824 ifmgd->have_beacon = true;
66e67e41 4825 assoc_data->timeout = jiffies;
89afe614 4826 assoc_data->timeout_started = true;
ef429dad 4827
30686bf7 4828 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
ef429dad
JB		 4829 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4830 sdata->vif.bss_conf.sync_device_ts =
4831 bss->device_ts_beacon;
4832 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4833 }
c65dd147
EG		 4834 } else {
4835 assoc_data->timeout = jiffies;
89afe614 4836 assoc_data->timeout_started = true;
66e67e41 4837 }
c65dd147
EG		 4838 rcu_read_unlock();
4839
8d61ffa5 4840 run_again(sdata, assoc_data->timeout);
66e67e41 4841
fcff4f10
PS		 4842 if (bss->corrupt_data) {
4843 char *corrupt_type = "data";
4844 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4845 if (bss->corrupt_data &
4846 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4847 corrupt_type = "beacon and probe response";
4848 else
4849 corrupt_type = "beacon";
4850 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4851 corrupt_type = "probe response";
bdcbd8e0
JB		 4852 sdata_info(sdata, "associating with AP with corrupt %s\n",
4853 corrupt_type);
fcff4f10
PS		 4854 }
4855
8d61ffa5 4856 return 0;
66e67e41 4857 err_clear:
c84a67a2 4858 eth_zero_addr(ifmgd->bssid);
3d2abdfd 4859 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 4860 ifmgd->assoc_data = NULL;
4861 err_free:
4862 kfree(assoc_data);
66e67e41 4863 return err;
f0706e82
JB		 4864}
4865
77fdaa12 4866int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
63c9c5e7 4867 struct cfg80211_deauth_request *req)
f0706e82 4868{
46900298 4869 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 4870 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
6863255b 4871 bool tx = !req->local_state_change;
f0706e82 4872
c9c3a060
JB		 4873 if (ifmgd->auth_data &&
4874 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
4875 sdata_info(sdata,
4876 "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
4877 req->bssid, req->reason_code,
4878 ieee80211_get_reason_code_string(req->reason_code));
0ff71613 4879
8c7d857c 4880 drv_mgd_prepare_tx(sdata->local, sdata);
37ad3888
JB		 4881 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4882 IEEE80211_STYPE_DEAUTH,
6863255b 4883 req->reason_code, tx,
37ad3888 4884 frame_buf);
86552017 4885 ieee80211_destroy_auth_data(sdata, false);
a90faa9d
EG		 4886 ieee80211_report_disconnect(sdata, frame_buf,
4887 sizeof(frame_buf), true,
4888 req->reason_code);
86552017 4889
c9c3a060 4890 return 0;
8c7d857c
EG		 4891 }
4892
a64cba3c
AO		 4893 if (ifmgd->assoc_data &&
4894 ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) {
4895 sdata_info(sdata,
4896 "aborting association with %pM by local choice (Reason: %u=%s)\n",
4897 req->bssid, req->reason_code,
4898 ieee80211_get_reason_code_string(req->reason_code));
4899
4900 drv_mgd_prepare_tx(sdata->local, sdata);
4901 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4902 IEEE80211_STYPE_DEAUTH,
4903 req->reason_code, tx,
4904 frame_buf);
4905 ieee80211_destroy_assoc_data(sdata, false);
4906 ieee80211_report_disconnect(sdata, frame_buf,
4907 sizeof(frame_buf), true,
4908 req->reason_code);
4909 return 0;
4910 }
4911
86552017
JB		 4912 if (ifmgd->associated &&
4913 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
c9c3a060
JB		 4914 sdata_info(sdata,
4915 "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
4916 req->bssid, req->reason_code,
4917 ieee80211_get_reason_code_string(req->reason_code));
4918
86552017
JB		 4919 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4920 req->reason_code, tx, frame_buf);
a90faa9d
EG		 4921 ieee80211_report_disconnect(sdata, frame_buf,
4922 sizeof(frame_buf), true,
4923 req->reason_code);
c9c3a060
JB		 4924 return 0;
4925 }
86552017 4926
c9c3a060 4927 return -ENOTCONN;
f0706e82 4928}
84363e6e 4929
77fdaa12 4930int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 4931 struct cfg80211_disassoc_request *req)
9c6bd790 4932{
77fdaa12 4933 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 4934 u8 bssid[ETH_ALEN];
6ae16775 4935 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
9c6bd790 4936
8d8b261a
JB		 4937 /*
4938 * cfg80211 should catch this ... but it's racy since
4939 * we can receive a disassoc frame, process it, hand it
4940 * to cfg80211 while that's in a locked section already
4941 * trying to tell us that the user wants to disconnect.
4942 */
8d61ffa5 4943 if (ifmgd->associated != req->bss)
77fdaa12 4944 return -ENOLINK;
77fdaa12 4945
bdcbd8e0 4946 sdata_info(sdata,
dfa1ad29
CO		 4947 "disassociating from %pM by local choice (Reason: %u=%s)\n",
4948 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
0ff71613 4949
e69e95db 4950 memcpy(bssid, req->bss->bssid, ETH_ALEN);
37ad3888
JB		 4951 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4952 req->reason_code, !req->local_state_change,
4953 frame_buf);
10f644a4 4954
a90faa9d
EG		 4955 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
4956 req->reason_code);
bc83b681 4957
10f644a4
JB		 4958 return 0;
4959}
026331c4 4960
afa762f6 4961void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
54e4ffb2
JB		 4962{
4963 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4964
49921859
BG		 4965 /*
4966 * Make sure some work items will not run after this,
4967 * they will not do anything but might not have been
4968 * cancelled when disconnecting.
4969 */
4970 cancel_work_sync(&ifmgd->monitor_work);
4971 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
4972 cancel_work_sync(&ifmgd->request_smps_work);
4973 cancel_work_sync(&ifmgd->csa_connection_drop_work);
4974 cancel_work_sync(&ifmgd->chswitch_work);
81dd2b88 4975 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
49921859 4976
8d61ffa5 4977 sdata_lock(sdata);
959867fa
JB		 4978 if (ifmgd->assoc_data) {
4979 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
54e4ffb2 4980 ieee80211_destroy_assoc_data(sdata, false);
959867fa
JB		 4981 cfg80211_assoc_timeout(sdata->dev, bss);
4982 }
54e4ffb2
JB		 4983 if (ifmgd->auth_data)
4984 ieee80211_destroy_auth_data(sdata, false);
1277b4a9
LK		 4985 spin_lock_bh(&ifmgd->teardown_lock);
4986 if (ifmgd->teardown_skb) {
4987 kfree_skb(ifmgd->teardown_skb);
4988 ifmgd->teardown_skb = NULL;
4989 ifmgd->orig_teardown_skb = NULL;
4990 }
4991 spin_unlock_bh(&ifmgd->teardown_lock);
54e4ffb2 4992 del_timer_sync(&ifmgd->timer);
8d61ffa5 4993 sdata_unlock(sdata);
54e4ffb2
JB		 4994}
4995
a97c13c3
JO		 4996void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
4997 enum nl80211_cqm_rssi_threshold_event rssi_event,
4998 gfp_t gfp)
4999{
5000 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5001
b5878a2d
JB		 5002 trace_api_cqm_rssi_notify(sdata, rssi_event);
5003
a97c13c3
JO		 5004 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
5005}
5006EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
98f03342
JB		 5007
5008void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
5009{
5010 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5011
5012 trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
5013
5014 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
5015}
5016EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);
Linux kernel - Deliverables
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