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mac80211: allow to transmit A-MSDU within A-MPDU
[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>
e8db0be1 23#include <linux/pm_qos.h>
d91f36db 24#include <linux/crc32.h>
5a0e3ad6 25#include <linux/slab.h>
bc3b2d7f 26#include <linux/export.h>
f0706e82 27#include <net/mac80211.h>
472dbc45 28#include <asm/unaligned.h>
60f8b39c 29
f0706e82 30#include "ieee80211_i.h"
24487981 31#include "driver-ops.h"
2c8dccc7
JB		 32#include "rate.h"
33#include "led.h"
f0706e82 34
1672c0e3 35#define IEEE80211_AUTH_TIMEOUT (HZ / 5)
cb236d2d 36#define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2)
1672c0e3
JB		 37#define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10)
38#define IEEE80211_AUTH_MAX_TRIES 3
39#define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
40#define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
cb236d2d 41#define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2)
1672c0e3
JB		 42#define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10)
43#define IEEE80211_ASSOC_MAX_TRIES 3
66e67e41 44
180205bd
BG		 45static int max_nullfunc_tries = 2;
46module_param(max_nullfunc_tries, int, 0644);
47MODULE_PARM_DESC(max_nullfunc_tries,
48 "Maximum nullfunc tx tries before disconnecting (reason 4).");
49
50static int max_probe_tries = 5;
51module_param(max_probe_tries, int, 0644);
52MODULE_PARM_DESC(max_probe_tries,
53 "Maximum probe tries before disconnecting (reason 4).");
b291ba11
JB		 54
55/*
7ccc8bd7
FF		 56 * Beacon loss timeout is calculated as N frames times the
57 * advertised beacon interval. This may need to be somewhat
58 * higher than what hardware might detect to account for
59 * delays in the host processing frames. But since we also
60 * probe on beacon miss before declaring the connection lost
61 * default to what we want.
b291ba11 62 */
59c1ec2b
BG		 63static int beacon_loss_count = 7;
64module_param(beacon_loss_count, int, 0644);
65MODULE_PARM_DESC(beacon_loss_count,
66 "Number of beacon intervals before we decide beacon was lost.");
7ccc8bd7 67
b291ba11
JB		 68/*
69 * Time the connection can be idle before we probe
70 * it to see if we can still talk to the AP.
71 */
d1c5091f 72#define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
b291ba11
JB		 73/*
74 * Time we wait for a probe response after sending
75 * a probe request because of beacon loss or for
76 * checking the connection still works.
77 */
180205bd
BG		 78static int probe_wait_ms = 500;
79module_param(probe_wait_ms, int, 0644);
80MODULE_PARM_DESC(probe_wait_ms,
81 "Maximum time(ms) to wait for probe response"
82 " before disconnecting (reason 4).");
f0706e82 83
17e4ec14
JM		 84/*
85 * Weight given to the latest Beacon frame when calculating average signal
86 * strength for Beacon frames received in the current BSS. This must be
87 * between 1 and 15.
88 */
89#define IEEE80211_SIGNAL_AVE_WEIGHT 3
90
391a200a
JM		 91/*
92 * How many Beacon frames need to have been used in average signal strength
93 * before starting to indicate signal change events.
94 */
95#define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
96
ca386f31
JB		 97/*
98 * We can have multiple work items (and connection probing)
99 * scheduling this timer, but we need to take care to only
100 * reschedule it when it should fire _earlier_ than it was
101 * asked for before, or if it's not pending right now. This
102 * function ensures that. Note that it then is required to
103 * run this function for all timeouts after the first one
104 * has happened -- the work that runs from this timer will
105 * do that.
106 */
8d61ffa5
JB		 107static void run_again(struct ieee80211_sub_if_data *sdata,
108 unsigned long timeout)
ca386f31 109{
8d61ffa5 110 sdata_assert_lock(sdata);
ca386f31 111
8d61ffa5
JB		 112 if (!timer_pending(&sdata->u.mgd.timer) ||
113 time_before(timeout, sdata->u.mgd.timer.expires))
114 mod_timer(&sdata->u.mgd.timer, timeout);
ca386f31
JB		 115}
116
d3a910a8 117void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
b291ba11 118{
c1288b12 119 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
b291ba11
JB		 120 return;
121
30686bf7 122 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
7eeff74c
JB		 123 return;
124
b291ba11 125 mod_timer(&sdata->u.mgd.bcn_mon_timer,
7ccc8bd7 126 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
b291ba11
JB		 127}
128
be099e82
LR		 129void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
130{
0c699c3a
LR		 131 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
132
8628172f
SG		 133 if (unlikely(!sdata->u.mgd.associated))
134 return;
135
448cd2e2
EP		 136 ifmgd->probe_send_count = 0;
137
30686bf7 138 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
be099e82
LR		 139 return;
140
141 mod_timer(&sdata->u.mgd.conn_mon_timer,
142 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
143}
144
5484e237 145static int ecw2cw(int ecw)
60f8b39c 146{
5484e237 147 return (1 << ecw) - 1;
60f8b39c
JB		 148}
149
6565ec9b
JB		 150static u32
151ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
152 struct ieee80211_supported_band *sband,
153 struct ieee80211_channel *channel,
53b954ee 154 const struct ieee80211_ht_cap *ht_cap,
6565ec9b
JB		 155 const struct ieee80211_ht_operation *ht_oper,
156 const struct ieee80211_vht_operation *vht_oper,
5cdaed1e 157 struct cfg80211_chan_def *chandef, bool tracking)
6565ec9b 158{
5cdaed1e 159 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6565ec9b 160 struct cfg80211_chan_def vht_chandef;
179b8fc7 161 struct ieee80211_sta_ht_cap sta_ht_cap;
6565ec9b
JB		 162 u32 ht_cfreq, ret;
163
179b8fc7
CRI		 164 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
165 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
166
6565ec9b
JB		 167 chandef->chan = channel;
168 chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
169 chandef->center_freq1 = channel->center_freq;
170 chandef->center_freq2 = 0;
171
179b8fc7 172 if (!ht_cap || !ht_oper || !sta_ht_cap.ht_supported) {
6565ec9b
JB		 173 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
174 goto out;
175 }
176
177 chandef->width = NL80211_CHAN_WIDTH_20;
178
53b954ee
EP		 179 if (!(ht_cap->cap_info &
180 cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40))) {
f3000e1b 181 ret = IEEE80211_STA_DISABLE_40MHZ;
7e6225a1 182 vht_chandef = *chandef;
53b954ee
EP		 183 goto out;
184 }
185
6565ec9b
JB		 186 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
187 channel->band);
188 /* check that channel matches the right operating channel */
5cdaed1e 189 if (!tracking && channel->center_freq != ht_cfreq) {
6565ec9b
JB		 190 /*
191 * It's possible that some APs are confused here;
192 * Netgear WNDR3700 sometimes reports 4 higher than
193 * the actual channel in association responses, but
194 * since we look at probe response/beacon data here
195 * it should be OK.
196 */
5cdaed1e
JB		 197 sdata_info(sdata,
198 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
199 channel->center_freq, ht_cfreq,
200 ht_oper->primary_chan, channel->band);
6565ec9b
JB		 201 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
202 goto out;
203 }
204
205 /* check 40 MHz support, if we have it */
179b8fc7 206 if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
6565ec9b
JB		 207 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
208 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
209 chandef->width = NL80211_CHAN_WIDTH_40;
210 chandef->center_freq1 += 10;
211 break;
212 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
213 chandef->width = NL80211_CHAN_WIDTH_40;
214 chandef->center_freq1 -= 10;
215 break;
216 }
217 } else {
218 /* 40 MHz (and 80 MHz) must be supported for VHT */
219 ret = IEEE80211_STA_DISABLE_VHT;
85220d71
JB		 220 /* also mark 40 MHz disabled */
221 ret |= IEEE80211_STA_DISABLE_40MHZ;
6565ec9b
JB		 222 goto out;
223 }
224
225 if (!vht_oper || !sband->vht_cap.vht_supported) {
226 ret = IEEE80211_STA_DISABLE_VHT;
227 goto out;
228 }
229
230 vht_chandef.chan = channel;
231 vht_chandef.center_freq1 =
232 ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx,
233 channel->band);
234 vht_chandef.center_freq2 = 0;
235
6565ec9b
JB		 236 switch (vht_oper->chan_width) {
237 case IEEE80211_VHT_CHANWIDTH_USE_HT:
238 vht_chandef.width = chandef->width;
cb664981 239 vht_chandef.center_freq1 = chandef->center_freq1;
6565ec9b
JB		 240 break;
241 case IEEE80211_VHT_CHANWIDTH_80MHZ:
242 vht_chandef.width = NL80211_CHAN_WIDTH_80;
243 break;
244 case IEEE80211_VHT_CHANWIDTH_160MHZ:
245 vht_chandef.width = NL80211_CHAN_WIDTH_160;
246 break;
247 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
248 vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
6553bf04
JB		 249 vht_chandef.center_freq2 =
250 ieee80211_channel_to_frequency(
251 vht_oper->center_freq_seg2_idx,
252 channel->band);
6565ec9b
JB		 253 break;
254 default:
5cdaed1e 255 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
30eb1dc2
JB		 256 sdata_info(sdata,
257 "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
258 vht_oper->chan_width);
6565ec9b
JB		 259 ret = IEEE80211_STA_DISABLE_VHT;
260 goto out;
261 }
262
263 if (!cfg80211_chandef_valid(&vht_chandef)) {
5cdaed1e 264 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
30eb1dc2
JB		 265 sdata_info(sdata,
266 "AP VHT information is invalid, disable VHT\n");
6565ec9b
JB		 267 ret = IEEE80211_STA_DISABLE_VHT;
268 goto out;
269 }
270
271 if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
272 ret = 0;
273 goto out;
274 }
275
276 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
5cdaed1e 277 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
30eb1dc2
JB		 278 sdata_info(sdata,
279 "AP VHT information doesn't match HT, disable VHT\n");
6565ec9b
JB		 280 ret = IEEE80211_STA_DISABLE_VHT;
281 goto out;
282 }
283
284 *chandef = vht_chandef;
285
286 ret = 0;
287
288out:
963a1852
JB		 289 /*
290 * When tracking the current AP, don't do any further checks if the
291 * new chandef is identical to the one we're currently using for the
292 * connection. This keeps us from playing ping-pong with regulatory,
293 * without it the following can happen (for example):
294 * - connect to an AP with 80 MHz, world regdom allows 80 MHz
295 * - AP advertises regdom US
296 * - CRDA loads regdom US with 80 MHz prohibited (old database)
297 * - the code below detects an unsupported channel, downgrades, and
298 * we disconnect from the AP in the caller
299 * - disconnect causes CRDA to reload world regdomain and the game
300 * starts anew.
301 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
302 *
303 * It seems possible that there are still scenarios with CSA or real
304 * bandwidth changes where a this could happen, but those cases are
305 * less common and wouldn't completely prevent using the AP.
306 */
307 if (tracking &&
308 cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef))
309 return ret;
310
586e01ed
JB		 311 /* don't print the message below for VHT mismatch if VHT is disabled */
312 if (ret & IEEE80211_STA_DISABLE_VHT)
313 vht_chandef = *chandef;
314
ddfe49b4
JB		 315 /*
316 * Ignore the DISABLED flag when we're already connected and only
317 * tracking the APs beacon for bandwidth changes - otherwise we
318 * might get disconnected here if we connect to an AP, update our
319 * regulatory information based on the AP's country IE and the
320 * information we have is wrong/outdated and disables the channel
321 * that we're actually using for the connection to the AP.
322 */
6565ec9b 323 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
ddfe49b4
JB		 324 tracking ? 0 :
325 IEEE80211_CHAN_DISABLED)) {
6565ec9b
JB		 326 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
327 ret = IEEE80211_STA_DISABLE_HT |
328 IEEE80211_STA_DISABLE_VHT;
b56e4b85 329 break;
6565ec9b
JB		 330 }
331
e6b7cde4 332 ret |= ieee80211_chandef_downgrade(chandef);
6565ec9b
JB		 333 }
334
5cdaed1e 335 if (chandef->width != vht_chandef.width && !tracking)
6565ec9b
JB		 336 sdata_info(sdata,
337 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
338
339 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
340 return ret;
341}
342
30eb1dc2
JB		 343static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
344 struct sta_info *sta,
53b954ee 345 const struct ieee80211_ht_cap *ht_cap,
30eb1dc2
JB		 346 const struct ieee80211_ht_operation *ht_oper,
347 const struct ieee80211_vht_operation *vht_oper,
348 const u8 *bssid, u32 *changed)
d5522e03
JB		 349{
350 struct ieee80211_local *local = sdata->local;
30eb1dc2 351 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d5522e03 352 struct ieee80211_supported_band *sband;
55de908a 353 struct ieee80211_channel *chan;
30eb1dc2 354 struct cfg80211_chan_def chandef;
9ed6bcce 355 u16 ht_opmode;
30eb1dc2
JB		 356 u32 flags;
357 enum ieee80211_sta_rx_bandwidth new_sta_bw;
358 int ret;
d5522e03 359
30eb1dc2
JB		 360 /* if HT was/is disabled, don't track any bandwidth changes */
361 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
1128958d
JB		 362 return 0;
363
30eb1dc2
JB		 364 /* don't check VHT if we associated as non-VHT station */
365 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
366 vht_oper = NULL;
367
368 if (WARN_ON_ONCE(!sta))
369 return -EINVAL;
370
017b45bb
AA		 371 /*
372 * if bss configuration changed store the new one -
373 * this may be applicable even if channel is identical
374 */
375 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
376 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
377 *changed |= BSS_CHANGED_HT;
378 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
379 }
380
f2d9330e 381 chan = sdata->vif.bss_conf.chandef.chan;
55de908a 382 sband = local->hw.wiphy->bands[chan->band];
d5522e03 383
30eb1dc2 384 /* calculate new channel (type) based on HT/VHT operation IEs */
53b954ee
EP		 385 flags = ieee80211_determine_chantype(sdata, sband, chan,
386 ht_cap, ht_oper, vht_oper,
387 &chandef, true);
30eb1dc2
JB		 388
389 /*
390 * Downgrade the new channel if we associated with restricted
391 * capabilities. For example, if we associated as a 20 MHz STA
392 * to a 40 MHz AP (due to regulatory, capabilities or config
393 * reasons) then switching to a 40 MHz channel now won't do us
394 * any good -- we couldn't use it with the AP.
395 */
396 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
397 chandef.width == NL80211_CHAN_WIDTH_80P80)
e6b7cde4 398 flags |= ieee80211_chandef_downgrade(&chandef);
30eb1dc2
JB		 399 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
400 chandef.width == NL80211_CHAN_WIDTH_160)
e6b7cde4 401 flags |= ieee80211_chandef_downgrade(&chandef);
30eb1dc2
JB		 402 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
403 chandef.width > NL80211_CHAN_WIDTH_20)
e6b7cde4 404 flags |= ieee80211_chandef_downgrade(&chandef);
30eb1dc2
JB		 405
406 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
407 return 0;
408
409 sdata_info(sdata,
410 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
411 ifmgd->bssid, chandef.chan->center_freq, chandef.width,
412 chandef.center_freq1, chandef.center_freq2);
413
414 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
415 IEEE80211_STA_DISABLE_VHT |
416 IEEE80211_STA_DISABLE_40MHZ |
417 IEEE80211_STA_DISABLE_80P80MHZ |
418 IEEE80211_STA_DISABLE_160MHZ)) ||
419 !cfg80211_chandef_valid(&chandef)) {
420 sdata_info(sdata,
421 "AP %pM changed bandwidth in a way we can't support - disconnect\n",
422 ifmgd->bssid);
423 return -EINVAL;
424 }
425
426 switch (chandef.width) {
427 case NL80211_CHAN_WIDTH_20_NOHT:
428 case NL80211_CHAN_WIDTH_20:
429 new_sta_bw = IEEE80211_STA_RX_BW_20;
430 break;
4bf88530 431 case NL80211_CHAN_WIDTH_40:
30eb1dc2 432 new_sta_bw = IEEE80211_STA_RX_BW_40;
64f68e5d 433 break;
30eb1dc2
JB		 434 case NL80211_CHAN_WIDTH_80:
435 new_sta_bw = IEEE80211_STA_RX_BW_80;
436 break;
437 case NL80211_CHAN_WIDTH_80P80:
438 case NL80211_CHAN_WIDTH_160:
439 new_sta_bw = IEEE80211_STA_RX_BW_160;
64f68e5d 440 break;
30eb1dc2
JB		 441 default:
442 return -EINVAL;
64f68e5d 443 }
d5522e03 444
30eb1dc2
JB		 445 if (new_sta_bw > sta->cur_max_bandwidth)
446 new_sta_bw = sta->cur_max_bandwidth;
64f68e5d 447
30eb1dc2
JB		 448 if (new_sta_bw < sta->sta.bandwidth) {
449 sta->sta.bandwidth = new_sta_bw;
450 rate_control_rate_update(local, sband, sta,
451 IEEE80211_RC_BW_CHANGED);
452 }
64f68e5d 453
30eb1dc2
JB		 454 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
455 if (ret) {
456 sdata_info(sdata,
457 "AP %pM changed bandwidth to incompatible one - disconnect\n",
458 ifmgd->bssid);
459 return ret;
460 }
7cc44ed4 461
30eb1dc2
JB		 462 if (new_sta_bw > sta->sta.bandwidth) {
463 sta->sta.bandwidth = new_sta_bw;
464 rate_control_rate_update(local, sband, sta,
465 IEEE80211_RC_BW_CHANGED);
0aaffa9b 466 }
d5522e03 467
30eb1dc2 468 return 0;
d5522e03
JB		 469}
470
9c6bd790
JB		 471/* frame sending functions */
472
66e67e41 473static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
9dde6423 474 struct sk_buff *skb, u8 ap_ht_param,
66e67e41
JB		 475 struct ieee80211_supported_band *sband,
476 struct ieee80211_channel *channel,
477 enum ieee80211_smps_mode smps)
478{
66e67e41
JB		 479 u8 *pos;
480 u32 flags = channel->flags;
481 u16 cap;
482 struct ieee80211_sta_ht_cap ht_cap;
483
484 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
485
66e67e41
JB		 486 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
487 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
488
66e67e41
JB		 489 /* determine capability flags */
490 cap = ht_cap.cap;
491
9dde6423 492 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
66e67e41
JB		 493 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
494 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
495 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
496 cap &= ~IEEE80211_HT_CAP_SGI_40;
497 }
498 break;
499 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
500 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
501 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
502 cap &= ~IEEE80211_HT_CAP_SGI_40;
503 }
504 break;
505 }
506
24398e39
JB		 507 /*
508 * If 40 MHz was disabled associate as though we weren't
509 * capable of 40 MHz -- some broken APs will never fall
510 * back to trying to transmit in 20 MHz.
511 */
512 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
513 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
514 cap &= ~IEEE80211_HT_CAP_SGI_40;
515 }
516
66e67e41
JB		 517 /* set SM PS mode properly */
518 cap &= ~IEEE80211_HT_CAP_SM_PS;
519 switch (smps) {
520 case IEEE80211_SMPS_AUTOMATIC:
521 case IEEE80211_SMPS_NUM_MODES:
522 WARN_ON(1);
523 case IEEE80211_SMPS_OFF:
524 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
525 IEEE80211_HT_CAP_SM_PS_SHIFT;
526 break;
527 case IEEE80211_SMPS_STATIC:
528 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
529 IEEE80211_HT_CAP_SM_PS_SHIFT;
530 break;
531 case IEEE80211_SMPS_DYNAMIC:
532 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
533 IEEE80211_HT_CAP_SM_PS_SHIFT;
534 break;
535 }
536
537 /* reserve and fill IE */
538 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
539 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
540}
541
322cd406
SS		 542/* This function determines vht capability flags for the association
543 * and builds the IE.
544 * Note - the function may set the owner of the MU-MIMO capability
545 */
d545daba
MP		 546static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
547 struct sk_buff *skb,
b08fbbd8
JB		 548 struct ieee80211_supported_band *sband,
549 struct ieee80211_vht_cap *ap_vht_cap)
d545daba 550{
322cd406 551 struct ieee80211_local *local = sdata->local;
d545daba
MP		 552 u8 *pos;
553 u32 cap;
554 struct ieee80211_sta_vht_cap vht_cap;
c1cf6d4e 555 u32 mask, ap_bf_sts, our_bf_sts;
d545daba
MP		 556
557 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
558
559 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
dd5ecfea 560 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
d545daba
MP		 561
562 /* determine capability flags */
563 cap = vht_cap.cap;
564
f2d9d270 565 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
575f0530
JB		 566 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
567
568 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
569 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ ||
570 bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
571 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
f2d9d270
JB		 572 }
573
574 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
575 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
575f0530 576 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
f2d9d270
JB		 577 }
578
b08fbbd8
JB		 579 /*
580 * Some APs apparently get confused if our capabilities are better
581 * than theirs, so restrict what we advertise in the assoc request.
582 */
583 if (!(ap_vht_cap->vht_cap_info &
584 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
322cd406
SS		 585 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
586 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE);
587 else if (!(ap_vht_cap->vht_cap_info &
588 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE)))
589 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
590
591 /*
592 * If some other vif is using the MU-MIMO capablity we cannot associate
593 * using MU-MIMO - this will lead to contradictions in the group-id
594 * mechanism.
595 * Ownership is defined since association request, in order to avoid
596 * simultaneous associations with MU-MIMO.
597 */
598 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) {
599 bool disable_mu_mimo = false;
600 struct ieee80211_sub_if_data *other;
601
602 list_for_each_entry_rcu(other, &local->interfaces, list) {
603 if (other->flags & IEEE80211_SDATA_MU_MIMO_OWNER) {
604 disable_mu_mimo = true;
605 break;
606 }
607 }
608 if (disable_mu_mimo)
609 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
610 else
611 sdata->flags |= IEEE80211_SDATA_MU_MIMO_OWNER;
612 }
b08fbbd8 613
c1cf6d4e
ES		 614 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK;
615
616 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask;
617 our_bf_sts = cap & mask;
618
619 if (ap_bf_sts < our_bf_sts) {
620 cap &= ~mask;
621 cap |= ap_bf_sts;
622 }
623
d545daba 624 /* reserve and fill IE */
d4950281 625 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
d545daba
MP		 626 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
627}
628
66e67e41
JB		 629static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
630{
631 struct ieee80211_local *local = sdata->local;
632 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
633 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
634 struct sk_buff *skb;
635 struct ieee80211_mgmt *mgmt;
636 u8 *pos, qos_info;
637 size_t offset = 0, noffset;
2103dec1 638 int i, count, rates_len, supp_rates_len, shift;
66e67e41
JB		 639 u16 capab;
640 struct ieee80211_supported_band *sband;
55de908a
JB		 641 struct ieee80211_chanctx_conf *chanctx_conf;
642 struct ieee80211_channel *chan;
2103dec1 643 u32 rate_flags, rates = 0;
66e67e41 644
8d61ffa5 645 sdata_assert_lock(sdata);
66e67e41 646
55de908a
JB		 647 rcu_read_lock();
648 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
649 if (WARN_ON(!chanctx_conf)) {
650 rcu_read_unlock();
651 return;
652 }
4bf88530 653 chan = chanctx_conf->def.chan;
2103dec1 654 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
55de908a
JB		 655 rcu_read_unlock();
656 sband = local->hw.wiphy->bands[chan->band];
2103dec1 657 shift = ieee80211_vif_get_shift(&sdata->vif);
66e67e41
JB		 658
659 if (assoc_data->supp_rates_len) {
660 /*
661 * Get all rates supported by the device and the AP as
662 * some APs don't like getting a superset of their rates
663 * in the association request (e.g. D-Link DAP 1353 in
664 * b-only mode)...
665 */
2103dec1
SW		 666 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
667 assoc_data->supp_rates,
668 assoc_data->supp_rates_len,
669 &rates);
66e67e41
JB		 670 } else {
671 /*
672 * In case AP not provide any supported rates information
673 * before association, we send information element(s) with
674 * all rates that we support.
675 */
2103dec1
SW		 676 rates_len = 0;
677 for (i = 0; i < sband->n_bitrates; i++) {
678 if ((rate_flags & sband->bitrates[i].flags)
679 != rate_flags)
680 continue;
681 rates |= BIT(i);
682 rates_len++;
683 }
66e67e41
JB		 684 }
685
686 skb = alloc_skb(local->hw.extra_tx_headroom +
687 sizeof(*mgmt) + /* bit too much but doesn't matter */
688 2 + assoc_data->ssid_len + /* SSID */
689 4 + rates_len + /* (extended) rates */
690 4 + /* power capability */
691 2 + 2 * sband->n_channels + /* supported channels */
692 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
d4950281 693 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
66e67e41
JB		 694 assoc_data->ie_len + /* extra IEs */
695 9, /* WMM */
696 GFP_KERNEL);
697 if (!skb)
698 return;
699
700 skb_reserve(skb, local->hw.extra_tx_headroom);
701
702 capab = WLAN_CAPABILITY_ESS;
703
704 if (sband->band == IEEE80211_BAND_2GHZ) {
ea1b2b45
JB		 705 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
706 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
66e67e41
JB		 707 }
708
709 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
710 capab |= WLAN_CAPABILITY_PRIVACY;
711
712 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
30686bf7 713 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT))
66e67e41
JB		 714 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
715
cd2f5dd7
AK		 716 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM)
717 capab |= WLAN_CAPABILITY_RADIO_MEASURE;
718
66e67e41
JB		 719 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
720 memset(mgmt, 0, 24);
721 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
722 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
723 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
724
725 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
726 skb_put(skb, 10);
727 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
728 IEEE80211_STYPE_REASSOC_REQ);
729 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
730 mgmt->u.reassoc_req.listen_interval =
731 cpu_to_le16(local->hw.conf.listen_interval);
732 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
733 ETH_ALEN);
734 } else {
735 skb_put(skb, 4);
736 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
737 IEEE80211_STYPE_ASSOC_REQ);
738 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
739 mgmt->u.assoc_req.listen_interval =
740 cpu_to_le16(local->hw.conf.listen_interval);
741 }
742
743 /* SSID */
744 pos = skb_put(skb, 2 + assoc_data->ssid_len);
745 *pos++ = WLAN_EID_SSID;
746 *pos++ = assoc_data->ssid_len;
747 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
748
749 /* add all rates which were marked to be used above */
750 supp_rates_len = rates_len;
751 if (supp_rates_len > 8)
752 supp_rates_len = 8;
753
754 pos = skb_put(skb, supp_rates_len + 2);
755 *pos++ = WLAN_EID_SUPP_RATES;
756 *pos++ = supp_rates_len;
757
758 count = 0;
759 for (i = 0; i < sband->n_bitrates; i++) {
760 if (BIT(i) & rates) {
2103dec1
SW		 761 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
762 5 * (1 << shift));
763 *pos++ = (u8) rate;
66e67e41
JB		 764 if (++count == 8)
765 break;
766 }
767 }
768
769 if (rates_len > count) {
770 pos = skb_put(skb, rates_len - count + 2);
771 *pos++ = WLAN_EID_EXT_SUPP_RATES;
772 *pos++ = rates_len - count;
773
774 for (i++; i < sband->n_bitrates; i++) {
775 if (BIT(i) & rates) {
2103dec1
SW		 776 int rate;
777 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
778 5 * (1 << shift));
779 *pos++ = (u8) rate;
66e67e41
JB		 780 }
781 }
782 }
783
cd2f5dd7
AK		 784 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT ||
785 capab & WLAN_CAPABILITY_RADIO_MEASURE) {
66e67e41
JB		 786 pos = skb_put(skb, 4);
787 *pos++ = WLAN_EID_PWR_CAPABILITY;
788 *pos++ = 2;
789 *pos++ = 0; /* min tx power */
0430c883
SW		 790 /* max tx power */
791 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
cd2f5dd7 792 }
66e67e41 793
cd2f5dd7 794 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
66e67e41
JB		 795 /* TODO: get this in reg domain format */
796 pos = skb_put(skb, 2 * sband->n_channels + 2);
797 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
798 *pos++ = 2 * sband->n_channels;
799 for (i = 0; i < sband->n_channels; i++) {
800 *pos++ = ieee80211_frequency_to_channel(
801 sband->channels[i].center_freq);
802 *pos++ = 1; /* one channel in the subband*/
803 }
804 }
805
806 /* if present, add any custom IEs that go before HT */
b3f51e94 807 if (assoc_data->ie_len) {
66e67e41
JB		 808 static const u8 before_ht[] = {
809 WLAN_EID_SSID,
810 WLAN_EID_SUPP_RATES,
811 WLAN_EID_EXT_SUPP_RATES,
812 WLAN_EID_PWR_CAPABILITY,
813 WLAN_EID_SUPPORTED_CHANNELS,
814 WLAN_EID_RSN,
815 WLAN_EID_QOS_CAPA,
816 WLAN_EID_RRM_ENABLED_CAPABILITIES,
817 WLAN_EID_MOBILITY_DOMAIN,
8ed28747
JB		 818 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */
819 WLAN_EID_RIC_DATA, /* reassoc only */
66e67e41
JB		 820 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
821 };
8ed28747
JB		 822 static const u8 after_ric[] = {
823 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
824 WLAN_EID_HT_CAPABILITY,
825 WLAN_EID_BSS_COEX_2040,
826 WLAN_EID_EXT_CAPABILITY,
827 WLAN_EID_QOS_TRAFFIC_CAPA,
828 WLAN_EID_TIM_BCAST_REQ,
829 WLAN_EID_INTERWORKING,
830 /* 60GHz doesn't happen right now */
831 WLAN_EID_VHT_CAPABILITY,
832 WLAN_EID_OPMODE_NOTIF,
833 };
834
835 noffset = ieee80211_ie_split_ric(assoc_data->ie,
836 assoc_data->ie_len,
837 before_ht,
838 ARRAY_SIZE(before_ht),
839 after_ric,
840 ARRAY_SIZE(after_ric),
841 offset);
66e67e41
JB		 842 pos = skb_put(skb, noffset - offset);
843 memcpy(pos, assoc_data->ie + offset, noffset - offset);
844 offset = noffset;
845 }
846
f2d9d270
JB		 847 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
848 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
849 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
850
a8243b72 851 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
9dde6423 852 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
04ecd257 853 sband, chan, sdata->smps_mode);
66e67e41 854
3de3802c
JB		 855 /* if present, add any custom IEs that go before VHT */
856 if (assoc_data->ie_len) {
857 static const u8 before_vht[] = {
858 WLAN_EID_SSID,
859 WLAN_EID_SUPP_RATES,
860 WLAN_EID_EXT_SUPP_RATES,
861 WLAN_EID_PWR_CAPABILITY,
862 WLAN_EID_SUPPORTED_CHANNELS,
863 WLAN_EID_RSN,
864 WLAN_EID_QOS_CAPA,
865 WLAN_EID_RRM_ENABLED_CAPABILITIES,
866 WLAN_EID_MOBILITY_DOMAIN,
867 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
868 WLAN_EID_HT_CAPABILITY,
869 WLAN_EID_BSS_COEX_2040,
870 WLAN_EID_EXT_CAPABILITY,
871 WLAN_EID_QOS_TRAFFIC_CAPA,
872 WLAN_EID_TIM_BCAST_REQ,
873 WLAN_EID_INTERWORKING,
874 };
8ed28747
JB		 875
876 /* RIC already taken above, so no need to handle here anymore */
3de3802c
JB		 877 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
878 before_vht, ARRAY_SIZE(before_vht),
879 offset);
880 pos = skb_put(skb, noffset - offset);
881 memcpy(pos, assoc_data->ie + offset, noffset - offset);
882 offset = noffset;
883 }
884
d545daba 885 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
b08fbbd8
JB		 886 ieee80211_add_vht_ie(sdata, skb, sband,
887 &assoc_data->ap_vht_cap);
d545daba 888
66e67e41 889 /* if present, add any custom non-vendor IEs that go after HT */
b3f51e94 890 if (assoc_data->ie_len) {
66e67e41
JB		 891 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
892 assoc_data->ie_len,
893 offset);
894 pos = skb_put(skb, noffset - offset);
895 memcpy(pos, assoc_data->ie + offset, noffset - offset);
896 offset = noffset;
897 }
898
76f0303d
JB		 899 if (assoc_data->wmm) {
900 if (assoc_data->uapsd) {
dc41e4d4
EP		 901 qos_info = ifmgd->uapsd_queues;
902 qos_info |= (ifmgd->uapsd_max_sp_len <<
66e67e41
JB		 903 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
904 } else {
905 qos_info = 0;
906 }
907
40b861a0 908 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
66e67e41
JB		 909 }
910
911 /* add any remaining custom (i.e. vendor specific here) IEs */
b3f51e94 912 if (assoc_data->ie_len) {
66e67e41
JB		 913 noffset = assoc_data->ie_len;
914 pos = skb_put(skb, noffset - offset);
915 memcpy(pos, assoc_data->ie + offset, noffset - offset);
916 }
917
a1845fc7
JB		 918 drv_mgd_prepare_tx(local, sdata);
919
66e67e41 920 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
30686bf7 921 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1672c0e3
JB		 922 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
923 IEEE80211_TX_INTFL_MLME_CONN_TX;
66e67e41
JB		 924 ieee80211_tx_skb(sdata, skb);
925}
926
572e0012
KV		 927void ieee80211_send_pspoll(struct ieee80211_local *local,
928 struct ieee80211_sub_if_data *sdata)
929{
572e0012
KV		 930 struct ieee80211_pspoll *pspoll;
931 struct sk_buff *skb;
572e0012 932
d8cd189e
KV		 933 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
934 if (!skb)
572e0012 935 return;
572e0012 936
d8cd189e
KV		 937 pspoll = (struct ieee80211_pspoll *) skb->data;
938 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
572e0012 939
62ae67be
JB		 940 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
941 ieee80211_tx_skb(sdata, skb);
572e0012
KV		 942}
943
965bedad
JB		 944void ieee80211_send_nullfunc(struct ieee80211_local *local,
945 struct ieee80211_sub_if_data *sdata,
946 int powersave)
947{
948 struct sk_buff *skb;
d8cd189e 949 struct ieee80211_hdr_3addr *nullfunc;
b6f35301 950 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
965bedad 951
d8cd189e
KV		 952 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
953 if (!skb)
965bedad 954 return;
965bedad 955
d8cd189e 956 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
965bedad 957 if (powersave)
d8cd189e 958 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
965bedad 959
6c17b77b
SF		 960 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
961 IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
ff40b425 962
30686bf7 963 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
ff40b425
PF		 964 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
965
392b9ffb 966 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
b6f35301
RM		 967 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
968
62ae67be 969 ieee80211_tx_skb(sdata, skb);
965bedad
JB		 970}
971
d524215f
FF		 972static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
973 struct ieee80211_sub_if_data *sdata)
974{
975 struct sk_buff *skb;
976 struct ieee80211_hdr *nullfunc;
977 __le16 fc;
978
979 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
980 return;
981
982 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
d15b8459 983 if (!skb)
d524215f 984 return;
d15b8459 985
d524215f
FF		 986 skb_reserve(skb, local->hw.extra_tx_headroom);
987
988 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
989 memset(nullfunc, 0, 30);
990 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
991 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
992 nullfunc->frame_control = fc;
993 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
994 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
995 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
996 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
997
998 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
999 ieee80211_tx_skb(sdata, skb);
1000}
1001
cc32abd4
JB		 1002/* spectrum management related things */
1003static void ieee80211_chswitch_work(struct work_struct *work)
1004{
1005 struct ieee80211_sub_if_data *sdata =
1006 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
675a0b04 1007 struct ieee80211_local *local = sdata->local;
cc32abd4 1008 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
7578d575 1009 int ret;
cc32abd4 1010
9607e6b6 1011 if (!ieee80211_sdata_running(sdata))
cc32abd4
JB		 1012 return;
1013
8d61ffa5 1014 sdata_lock(sdata);
4c3ebc56
MK		 1015 mutex_lock(&local->mtx);
1016 mutex_lock(&local->chanctx_mtx);
1017
77fdaa12
JB		 1018 if (!ifmgd->associated)
1019 goto out;
cc32abd4 1020
4c3ebc56
MK		 1021 if (!sdata->vif.csa_active)
1022 goto out;
1023
1024 /*
1025 * using reservation isn't immediate as it may be deferred until later
1026 * with multi-vif. once reservation is complete it will re-schedule the
1027 * work with no reserved_chanctx so verify chandef to check if it
1028 * completed successfully
1029 */
1030
1031 if (sdata->reserved_chanctx) {
1032 /*
1033 * with multi-vif csa driver may call ieee80211_csa_finish()
1034 * many times while waiting for other interfaces to use their
1035 * reservations
1036 */
1037 if (sdata->reserved_ready)
1038 goto out;
1039
1040 ret = ieee80211_vif_use_reserved_context(sdata);
1041 if (ret) {
1042 sdata_info(sdata,
1043 "failed to use reserved channel context, disconnecting (err=%d)\n",
1044 ret);
1045 ieee80211_queue_work(&sdata->local->hw,
1046 &ifmgd->csa_connection_drop_work);
1047 goto out;
1048 }
1049
1050 goto out;
1051 }
1052
1053 if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
1054 &sdata->csa_chandef)) {
7578d575 1055 sdata_info(sdata,
4c3ebc56 1056 "failed to finalize channel switch, disconnecting\n");
7578d575
AN		 1057 ieee80211_queue_work(&sdata->local->hw,
1058 &ifmgd->csa_connection_drop_work);
1059 goto out;
1060 }
675a0b04 1061
cc32abd4 1062 /* XXX: shouldn't really modify cfg80211-owned data! */
33787fc4 1063 ifmgd->associated->channel = sdata->csa_chandef.chan;
cc32abd4 1064
0c21e632
LC		 1065 ifmgd->csa_waiting_bcn = true;
1066
1067 ieee80211_sta_reset_beacon_monitor(sdata);
1068 ieee80211_sta_reset_conn_monitor(sdata);
1069
1070out:
1071 mutex_unlock(&local->chanctx_mtx);
1072 mutex_unlock(&local->mtx);
1073 sdata_unlock(sdata);
1074}
1075
1076static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata)
1077{
1078 struct ieee80211_local *local = sdata->local;
1079 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1080 int ret;
1081
1082 sdata_assert_lock(sdata);
1083
1084 WARN_ON(!sdata->vif.csa_active);
4c3ebc56 1085
a46992b4
LC		 1086 if (sdata->csa_block_tx) {
1087 ieee80211_wake_vif_queues(local, sdata,
1088 IEEE80211_QUEUE_STOP_REASON_CSA);
1089 sdata->csa_block_tx = false;
1090 }
7578d575 1091
0c21e632
LC		 1092 sdata->vif.csa_active = false;
1093 ifmgd->csa_waiting_bcn = false;
1094
f1d65583
LC		 1095 ret = drv_post_channel_switch(sdata);
1096 if (ret) {
1097 sdata_info(sdata,
1098 "driver post channel switch failed, disconnecting\n");
1099 ieee80211_queue_work(&local->hw,
1100 &ifmgd->csa_connection_drop_work);
0c21e632 1101 return;
f1d65583 1102 }
688b1ecf
LC		 1103
1104 cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef);
cc32abd4
JB		 1105}
1106
5ce6e438
JB		 1107void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
1108{
55de908a
JB		 1109 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1110 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5ce6e438
JB		 1111
1112 trace_api_chswitch_done(sdata, success);
1113 if (!success) {
882a7c69
JB		 1114 sdata_info(sdata,
1115 "driver channel switch failed, disconnecting\n");
1116 ieee80211_queue_work(&sdata->local->hw,
1117 &ifmgd->csa_connection_drop_work);
1118 } else {
1119 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
5ce6e438 1120 }
5ce6e438
JB		 1121}
1122EXPORT_SYMBOL(ieee80211_chswitch_done);
1123
cc32abd4
JB		 1124static void ieee80211_chswitch_timer(unsigned long data)
1125{
1126 struct ieee80211_sub_if_data *sdata =
1127 (struct ieee80211_sub_if_data *) data;
5bb644a0 1128
9b7d72c1 1129 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
cc32abd4
JB		 1130}
1131
37799e52 1132static void
4a3cb702 1133ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
2ba45384
LC		 1134 u64 timestamp, u32 device_timestamp,
1135 struct ieee802_11_elems *elems,
04a161f4 1136 bool beacon)
cc32abd4 1137{
b4f286a1 1138 struct ieee80211_local *local = sdata->local;
cc32abd4 1139 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
37799e52 1140 struct cfg80211_bss *cbss = ifmgd->associated;
4c3ebc56 1141 struct ieee80211_chanctx_conf *conf;
55de908a 1142 struct ieee80211_chanctx *chanctx;
e6b7cde4 1143 enum ieee80211_band current_band;
c0f17eb9 1144 struct ieee80211_csa_ie csa_ie;
6d027bcc 1145 struct ieee80211_channel_switch ch_switch;
e6b7cde4 1146 int res;
cc32abd4 1147
8d61ffa5 1148 sdata_assert_lock(sdata);
77fdaa12 1149
37799e52 1150 if (!cbss)
cc32abd4
JB		 1151 return;
1152
b4f286a1 1153 if (local->scanning)
cc32abd4
JB		 1154 return;
1155
37799e52 1156 /* disregard subsequent announcements if we are already processing */
3e2a0226 1157 if (sdata->vif.csa_active)
cc32abd4
JB		 1158 return;
1159
e6b7cde4 1160 current_band = cbss->channel->band;
c0f17eb9 1161 memset(&csa_ie, 0, sizeof(csa_ie));
84469a45 1162 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band,
e6b7cde4 1163 ifmgd->flags,
c0f17eb9 1164 ifmgd->associated->bssid, &csa_ie);
e6b7cde4 1165 if (res < 0)
b4f286a1 1166 ieee80211_queue_work(&local->hw,
882a7c69 1167 &ifmgd->csa_connection_drop_work);
e6b7cde4 1168 if (res)
cc32abd4 1169 return;
cd64f2a9 1170
c0f17eb9 1171 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
85220d71
JB		 1172 IEEE80211_CHAN_DISABLED)) {
1173 sdata_info(sdata,
1174 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
e6b7cde4 1175 ifmgd->associated->bssid,
c0f17eb9
CYY		 1176 csa_ie.chandef.chan->center_freq,
1177 csa_ie.chandef.width, csa_ie.chandef.center_freq1,
1178 csa_ie.chandef.center_freq2);
85220d71
JB		 1179 ieee80211_queue_work(&local->hw,
1180 &ifmgd->csa_connection_drop_work);
1181 return;
1182 }
1183
f84eaa10
JB		 1184 if (cfg80211_chandef_identical(&csa_ie.chandef,
1185 &sdata->vif.bss_conf.chandef)) {
1186 if (ifmgd->csa_ignored_same_chan)
1187 return;
1188 sdata_info(sdata,
1189 "AP %pM tries to chanswitch to same channel, ignore\n",
1190 ifmgd->associated->bssid);
1191 ifmgd->csa_ignored_same_chan = true;
1192 return;
1193 }
1194
c5a71688
AN		 1195 /*
1196 * Drop all TDLS peers - either we disconnect or move to a different
1197 * channel from this point on. There's no telling what our peer will do.
1198 * The TDLS WIDER_BW scenario is also problematic, as peers might now
1199 * have an incompatible wider chandef.
1200 */
1201 ieee80211_teardown_tdls_peers(sdata);
1202
4c3ebc56 1203 mutex_lock(&local->mtx);
7578d575 1204 mutex_lock(&local->chanctx_mtx);
4c3ebc56
MK		 1205 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1206 lockdep_is_held(&local->chanctx_mtx));
1207 if (!conf) {
1208 sdata_info(sdata,
1209 "no channel context assigned to vif?, disconnecting\n");
f3b0bbb3 1210 goto drop_connection;
4c3ebc56
MK		 1211 }
1212
1213 chanctx = container_of(conf, struct ieee80211_chanctx, conf);
1214
0f791eb4 1215 if (local->use_chanctx &&
30686bf7 1216 !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) {
0f791eb4
LC		 1217 sdata_info(sdata,
1218 "driver doesn't support chan-switch with channel contexts\n");
f3b0bbb3 1219 goto drop_connection;
55de908a
JB		 1220 }
1221
6d027bcc
LC		 1222 ch_switch.timestamp = timestamp;
1223 ch_switch.device_timestamp = device_timestamp;
1224 ch_switch.block_tx = csa_ie.mode;
1225 ch_switch.chandef = csa_ie.chandef;
1226 ch_switch.count = csa_ie.count;
1227
1228 if (drv_pre_channel_switch(sdata, &ch_switch)) {
1229 sdata_info(sdata,
1230 "preparing for channel switch failed, disconnecting\n");
f3b0bbb3 1231 goto drop_connection;
6d027bcc
LC		 1232 }
1233
4c3ebc56
MK		 1234 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
1235 chanctx->mode, false);
1236 if (res) {
55de908a 1237 sdata_info(sdata,
4c3ebc56
MK		 1238 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
1239 res);
f3b0bbb3 1240 goto drop_connection;
55de908a 1241 }
b4f286a1 1242 mutex_unlock(&local->chanctx_mtx);
55de908a 1243
c46a73f3 1244 sdata->vif.csa_active = true;
4c3ebc56 1245 sdata->csa_chandef = csa_ie.chandef;
59af6928 1246 sdata->csa_block_tx = csa_ie.mode;
f84eaa10 1247 ifmgd->csa_ignored_same_chan = false;
55de908a 1248
59af6928 1249 if (sdata->csa_block_tx)
a46992b4
LC		 1250 ieee80211_stop_vif_queues(local, sdata,
1251 IEEE80211_QUEUE_STOP_REASON_CSA);
59af6928 1252 mutex_unlock(&local->mtx);
57eebdf3 1253
2f457293
LC		 1254 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef,
1255 csa_ie.count);
1256
b4f286a1 1257 if (local->ops->channel_switch) {
5ce6e438 1258 /* use driver's channel switch callback */
0f791eb4 1259 drv_channel_switch(local, sdata, &ch_switch);
5ce6e438
JB		 1260 return;
1261 }
1262
1263 /* channel switch handled in software */
c0f17eb9 1264 if (csa_ie.count <= 1)
b4f286a1 1265 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
57eebdf3 1266 else
cc32abd4 1267 mod_timer(&ifmgd->chswitch_timer,
ff1e417c
LC		 1268 TU_TO_EXP_TIME((csa_ie.count - 1) *
1269 cbss->beacon_interval));
f3b0bbb3
JB		 1270 return;
1271 drop_connection:
1272 ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work);
1273 mutex_unlock(&local->chanctx_mtx);
1274 mutex_unlock(&local->mtx);
cc32abd4
JB		 1275}
1276
24a4e400
SG		 1277static bool
1278ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
1279 struct ieee80211_channel *channel,
1280 const u8 *country_ie, u8 country_ie_len,
1281 const u8 *pwr_constr_elem,
1282 int *chan_pwr, int *pwr_reduction)
cc32abd4 1283{
04b7b2ff
JB		 1284 struct ieee80211_country_ie_triplet *triplet;
1285 int chan = ieee80211_frequency_to_channel(channel->center_freq);
24a4e400 1286 int i, chan_increment;
04b7b2ff 1287 bool have_chan_pwr = false;
cc32abd4 1288
04b7b2ff
JB		 1289 /* Invalid IE */
1290 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
24a4e400 1291 return false;
cc32abd4 1292
04b7b2ff
JB		 1293 triplet = (void *)(country_ie + 3);
1294 country_ie_len -= 3;
1295
1296 switch (channel->band) {
1297 default:
1298 WARN_ON_ONCE(1);
1299 /* fall through */
1300 case IEEE80211_BAND_2GHZ:
1301 case IEEE80211_BAND_60GHZ:
1302 chan_increment = 1;
1303 break;
1304 case IEEE80211_BAND_5GHZ:
1305 chan_increment = 4;
1306 break;
cc32abd4 1307 }
04b7b2ff
JB		 1308
1309 /* find channel */
1310 while (country_ie_len >= 3) {
1311 u8 first_channel = triplet->chans.first_channel;
1312
1313 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1314 goto next;
1315
1316 for (i = 0; i < triplet->chans.num_channels; i++) {
1317 if (first_channel + i * chan_increment == chan) {
1318 have_chan_pwr = true;
24a4e400 1319 *chan_pwr = triplet->chans.max_power;
04b7b2ff
JB		 1320 break;
1321 }
1322 }
1323 if (have_chan_pwr)
1324 break;
1325
1326 next:
1327 triplet++;
1328 country_ie_len -= 3;
1329 }
1330
a5fee9cb 1331 if (have_chan_pwr && pwr_constr_elem)
24a4e400 1332 *pwr_reduction = *pwr_constr_elem;
a5fee9cb
MB		 1333 else
1334 *pwr_reduction = 0;
1335
24a4e400
SG		 1336 return have_chan_pwr;
1337}
1338
c8d65917
SG		 1339static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
1340 struct ieee80211_channel *channel,
1341 const u8 *cisco_dtpc_ie,
1342 int *pwr_level)
1343{
1344 /* From practical testing, the first data byte of the DTPC element
1345 * seems to contain the requested dBm level, and the CLI on Cisco
1346 * APs clearly state the range is -127 to 127 dBm, which indicates
1347 * a signed byte, although it seemingly never actually goes negative.
1348 * The other byte seems to always be zero.
1349 */
1350 *pwr_level = (__s8)cisco_dtpc_ie[4];
1351}
1352
24a4e400
SG		 1353static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1354 struct ieee80211_channel *channel,
1355 struct ieee80211_mgmt *mgmt,
1356 const u8 *country_ie, u8 country_ie_len,
c8d65917
SG		 1357 const u8 *pwr_constr_ie,
1358 const u8 *cisco_dtpc_ie)
24a4e400 1359{
c8d65917
SG		 1360 bool has_80211h_pwr = false, has_cisco_pwr = false;
1361 int chan_pwr = 0, pwr_reduction_80211h = 0;
1362 int pwr_level_cisco, pwr_level_80211h;
24a4e400 1363 int new_ap_level;
a5fee9cb 1364 __le16 capab = mgmt->u.probe_resp.capab_info;
04b7b2ff 1365
a5fee9cb
MB		 1366 if (country_ie &&
1367 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) ||
1368 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) {
24a4e400
SG		 1369 has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
1370 sdata, channel, country_ie, country_ie_len,
1371 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
c8d65917
SG		 1372 pwr_level_80211h =
1373 max_t(int, 0, chan_pwr - pwr_reduction_80211h);
1374 }
1375
1376 if (cisco_dtpc_ie) {
1377 ieee80211_find_cisco_dtpc(
1378 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
1379 has_cisco_pwr = true;
24a4e400 1380 }
04b7b2ff 1381
c8d65917 1382 if (!has_80211h_pwr && !has_cisco_pwr)
1ea6f9c0 1383 return 0;
04b7b2ff 1384
c8d65917
SG		 1385 /* If we have both 802.11h and Cisco DTPC, apply both limits
1386 * by picking the smallest of the two power levels advertised.
1387 */
1388 if (has_80211h_pwr &&
1389 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
cef2fc1c
JL		 1390 sdata_dbg(sdata,
1391 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1392 pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
1393 sdata->u.mgd.bssid);
c8d65917
SG		 1394 new_ap_level = pwr_level_80211h;
1395 } else { /* has_cisco_pwr is always true here. */
cef2fc1c
JL		 1396 sdata_dbg(sdata,
1397 "Limiting TX power to %d dBm as advertised by %pM\n",
1398 pwr_level_cisco, sdata->u.mgd.bssid);
c8d65917
SG		 1399 new_ap_level = pwr_level_cisco;
1400 }
04b7b2ff 1401
1ea6f9c0
JB		 1402 if (sdata->ap_power_level == new_ap_level)
1403 return 0;
04b7b2ff 1404
1ea6f9c0
JB		 1405 sdata->ap_power_level = new_ap_level;
1406 if (__ieee80211_recalc_txpower(sdata))
1407 return BSS_CHANGED_TXPOWER;
1408 return 0;
cc32abd4
JB		 1409}
1410
965bedad
JB		 1411/* powersave */
1412static void ieee80211_enable_ps(struct ieee80211_local *local,
1413 struct ieee80211_sub_if_data *sdata)
1414{
1415 struct ieee80211_conf *conf = &local->hw.conf;
1416
d5edaedc
JB		 1417 /*
1418 * If we are scanning right now then the parameters will
1419 * take effect when scan finishes.
1420 */
fbe9c429 1421 if (local->scanning)
d5edaedc
JB		 1422 return;
1423
965bedad 1424 if (conf->dynamic_ps_timeout > 0 &&
30686bf7 1425 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) {
965bedad
JB		 1426 mod_timer(&local->dynamic_ps_timer, jiffies +
1427 msecs_to_jiffies(conf->dynamic_ps_timeout));
1428 } else {
30686bf7 1429 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK))
965bedad 1430 ieee80211_send_nullfunc(local, sdata, 1);
375177bf 1431
30686bf7
JB		 1432 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
1433 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
2a13052f
JO		 1434 return;
1435
1436 conf->flags |= IEEE80211_CONF_PS;
1437 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
965bedad
JB		 1438 }
1439}
1440
1441static void ieee80211_change_ps(struct ieee80211_local *local)
1442{
1443 struct ieee80211_conf *conf = &local->hw.conf;
1444
1445 if (local->ps_sdata) {
965bedad
JB		 1446 ieee80211_enable_ps(local, local->ps_sdata);
1447 } else if (conf->flags & IEEE80211_CONF_PS) {
1448 conf->flags &= ~IEEE80211_CONF_PS;
1449 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1450 del_timer_sync(&local->dynamic_ps_timer);
1451 cancel_work_sync(&local->dynamic_ps_enable_work);
1452 }
1453}
1454
808118cb
JY		 1455static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1456{
1457 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1458 struct sta_info *sta = NULL;
c2c98fde 1459 bool authorized = false;
808118cb
JY		 1460
1461 if (!mgd->powersave)
1462 return false;
1463
05cb9108
JB		 1464 if (mgd->broken_ap)
1465 return false;
1466
808118cb
JY		 1467 if (!mgd->associated)
1468 return false;
1469
392b9ffb 1470 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
808118cb
JY		 1471 return false;
1472
989c6505 1473 if (!mgd->have_beacon)
ce857888
AB		 1474 return false;
1475
808118cb
JY		 1476 rcu_read_lock();
1477 sta = sta_info_get(sdata, mgd->bssid);
1478 if (sta)
c2c98fde 1479 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
808118cb
JY		 1480 rcu_read_unlock();
1481
c2c98fde 1482 return authorized;
808118cb
JY		 1483}
1484
965bedad 1485/* need to hold RTNL or interface lock */
10f644a4 1486void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
965bedad
JB		 1487{
1488 struct ieee80211_sub_if_data *sdata, *found = NULL;
1489 int count = 0;
195e294d 1490 int timeout;
965bedad 1491
30686bf7 1492 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) {
965bedad
JB		 1493 local->ps_sdata = NULL;
1494 return;
1495 }
1496
1497 list_for_each_entry(sdata, &local->interfaces, list) {
9607e6b6 1498 if (!ieee80211_sdata_running(sdata))
965bedad 1499 continue;
8c7914de
RM		 1500 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1501 /* If an AP vif is found, then disable PS
1502 * by setting the count to zero thereby setting
1503 * ps_sdata to NULL.
1504 */
1505 count = 0;
1506 break;
1507 }
965bedad
JB		 1508 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1509 continue;
1510 found = sdata;
1511 count++;
1512 }
1513
808118cb 1514 if (count == 1 && ieee80211_powersave_allowed(found)) {
10f644a4
JB		 1515 s32 beaconint_us;
1516
1517 if (latency < 0)
ed77134b 1518 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
10f644a4
JB		 1519
1520 beaconint_us = ieee80211_tu_to_usec(
1521 found->vif.bss_conf.beacon_int);
1522
ff616381 1523 timeout = local->dynamic_ps_forced_timeout;
195e294d
JO		 1524 if (timeout < 0) {
1525 /*
ff616381
JO		 1526 * Go to full PSM if the user configures a very low
1527 * latency requirement.
0ab82b04
EP		 1528 * The 2000 second value is there for compatibility
1529 * until the PM_QOS_NETWORK_LATENCY is configured
1530 * with real values.
195e294d 1531 */
0ab82b04
EP		 1532 if (latency > (1900 * USEC_PER_MSEC) &&
1533 latency != (2000 * USEC_PER_SEC))
195e294d 1534 timeout = 0;
ff616381
JO		 1535 else
1536 timeout = 100;
195e294d 1537 }
09b85568 1538 local->hw.conf.dynamic_ps_timeout = timeout;
195e294d 1539
04fe2037 1540 if (beaconint_us > latency) {
10f644a4 1541 local->ps_sdata = NULL;
04fe2037 1542 } else {
04fe2037 1543 int maxslp = 1;
826262c3 1544 u8 dtimper = found->u.mgd.dtim_period;
56007a02
JB		 1545
1546 /* If the TIM IE is invalid, pretend the value is 1 */
1547 if (!dtimper)
1548 dtimper = 1;
1549 else if (dtimper > 1)
04fe2037
JB		 1550 maxslp = min_t(int, dtimper,
1551 latency / beaconint_us);
1552
9ccebe61 1553 local->hw.conf.max_sleep_period = maxslp;
56007a02 1554 local->hw.conf.ps_dtim_period = dtimper;
10f644a4 1555 local->ps_sdata = found;
04fe2037 1556 }
10f644a4 1557 } else {
965bedad 1558 local->ps_sdata = NULL;
10f644a4 1559 }
965bedad
JB		 1560
1561 ieee80211_change_ps(local);
1562}
1563
ab095877
EP		 1564void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1565{
1566 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1567
1568 if (sdata->vif.bss_conf.ps != ps_allowed) {
1569 sdata->vif.bss_conf.ps = ps_allowed;
1570 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1571 }
1572}
1573
965bedad
JB		 1574void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1575{
1576 struct ieee80211_local *local =
1577 container_of(work, struct ieee80211_local,
1578 dynamic_ps_disable_work);
1579
1580 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1581 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1582 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1583 }
1584
1585 ieee80211_wake_queues_by_reason(&local->hw,
445ea4e8 1586 IEEE80211_MAX_QUEUE_MAP,
cca07b00
LC		 1587 IEEE80211_QUEUE_STOP_REASON_PS,
1588 false);
965bedad
JB		 1589}
1590
1591void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1592{
1593 struct ieee80211_local *local =
1594 container_of(work, struct ieee80211_local,
1595 dynamic_ps_enable_work);
1596 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
5e34069c 1597 struct ieee80211_if_managed *ifmgd;
1ddc2867
RM		 1598 unsigned long flags;
1599 int q;
965bedad
JB		 1600
1601 /* can only happen when PS was just disabled anyway */
1602 if (!sdata)
1603 return;
1604
5e34069c
CL		 1605 ifmgd = &sdata->u.mgd;
1606
965bedad
JB		 1607 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1608 return;
1609
09b85568 1610 if (local->hw.conf.dynamic_ps_timeout > 0) {
77b7023a
AN		 1611 /* don't enter PS if TX frames are pending */
1612 if (drv_tx_frames_pending(local)) {
1ddc2867
RM		 1613 mod_timer(&local->dynamic_ps_timer, jiffies +
1614 msecs_to_jiffies(
1615 local->hw.conf.dynamic_ps_timeout));
1616 return;
1617 }
77b7023a
AN		 1618
1619 /*
1620 * transmission can be stopped by others which leads to
1621 * dynamic_ps_timer expiry. Postpone the ps timer if it
1622 * is not the actual idle state.
1623 */
1624 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1625 for (q = 0; q < local->hw.queues; q++) {
1626 if (local->queue_stop_reasons[q]) {
1627 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1628 flags);
1629 mod_timer(&local->dynamic_ps_timer, jiffies +
1630 msecs_to_jiffies(
1631 local->hw.conf.dynamic_ps_timeout));
1632 return;
1633 }
1634 }
1635 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1ddc2867 1636 }
1ddc2867 1637
30686bf7 1638 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) &&
9c38a8b4 1639 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
a1598383 1640 if (drv_tx_frames_pending(local)) {
e8306f98
VN		 1641 mod_timer(&local->dynamic_ps_timer, jiffies +
1642 msecs_to_jiffies(
1643 local->hw.conf.dynamic_ps_timeout));
a1598383 1644 } else {
e8306f98
VN		 1645 ieee80211_send_nullfunc(local, sdata, 1);
1646 /* Flush to get the tx status of nullfunc frame */
3b24f4c6 1647 ieee80211_flush_queues(local, sdata, false);
e8306f98 1648 }
f3e85b9e
VN		 1649 }
1650
30686bf7
JB		 1651 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
1652 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) ||
375177bf
VN		 1653 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1654 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1655 local->hw.conf.flags |= IEEE80211_CONF_PS;
1656 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1657 }
965bedad
JB		 1658}
1659
1660void ieee80211_dynamic_ps_timer(unsigned long data)
1661{
1662 struct ieee80211_local *local = (void *) data;
1663
42935eca 1664 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
965bedad
JB		 1665}
1666
164eb02d
SW		 1667void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1668{
1669 struct delayed_work *delayed_work =
1670 container_of(work, struct delayed_work, work);
1671 struct ieee80211_sub_if_data *sdata =
1672 container_of(delayed_work, struct ieee80211_sub_if_data,
1673 dfs_cac_timer_work);
d2859df5 1674 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
164eb02d 1675
34a3740d
JB		 1676 mutex_lock(&sdata->local->mtx);
1677 if (sdata->wdev.cac_started) {
1678 ieee80211_vif_release_channel(sdata);
1679 cfg80211_cac_event(sdata->dev, &chandef,
1680 NL80211_RADAR_CAC_FINISHED,
1681 GFP_KERNEL);
1682 }
1683 mutex_unlock(&sdata->local->mtx);
164eb02d
SW		 1684}
1685
02219b3a
JB		 1686static bool
1687__ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1688{
1689 struct ieee80211_local *local = sdata->local;
1690 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
cc72f6e2 1691 bool ret = false;
02219b3a
JB		 1692 int ac;
1693
1694 if (local->hw.queues < IEEE80211_NUM_ACS)
1695 return false;
1696
1697 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1698 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
1699 int non_acm_ac;
1700 unsigned long now = jiffies;
1701
1702 if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
1703 tx_tspec->admitted_time &&
1704 time_after(now, tx_tspec->time_slice_start + HZ)) {
1705 tx_tspec->consumed_tx_time = 0;
1706 tx_tspec->time_slice_start = now;
1707
1708 if (tx_tspec->downgraded)
1709 tx_tspec->action =
1710 TX_TSPEC_ACTION_STOP_DOWNGRADE;
1711 }
1712
1713 switch (tx_tspec->action) {
1714 case TX_TSPEC_ACTION_STOP_DOWNGRADE:
1715 /* take the original parameters */
1716 if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac]))
1717 sdata_err(sdata,
1718 "failed to set TX queue parameters for queue %d\n",
1719 ac);
1720 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1721 tx_tspec->downgraded = false;
1722 ret = true;
1723 break;
1724 case TX_TSPEC_ACTION_DOWNGRADE:
1725 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
1726 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1727 ret = true;
1728 break;
1729 }
1730 /* downgrade next lower non-ACM AC */
1731 for (non_acm_ac = ac + 1;
1732 non_acm_ac < IEEE80211_NUM_ACS;
1733 non_acm_ac++)
1734 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
1735 break;
1736 /* The loop will result in using BK even if it requires
1737 * admission control, such configuration makes no sense
1738 * and we have to transmit somehow - the AC selection
1739 * does the same thing.
1740 */
1741 if (drv_conf_tx(local, sdata, ac,
1742 &sdata->tx_conf[non_acm_ac]))
1743 sdata_err(sdata,
1744 "failed to set TX queue parameters for queue %d\n",
1745 ac);
1746 tx_tspec->action = TX_TSPEC_ACTION_NONE;
1747 ret = true;
1748 schedule_delayed_work(&ifmgd->tx_tspec_wk,
1749 tx_tspec->time_slice_start + HZ - now + 1);
1750 break;
1751 case TX_TSPEC_ACTION_NONE:
1752 /* nothing now */
1753 break;
1754 }
1755 }
1756
1757 return ret;
1758}
1759
1760void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
1761{
1762 if (__ieee80211_sta_handle_tspec_ac_params(sdata))
1763 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1764}
1765
1766static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
1767{
1768 struct ieee80211_sub_if_data *sdata;
1769
1770 sdata = container_of(work, struct ieee80211_sub_if_data,
1771 u.mgd.tx_tspec_wk.work);
1772 ieee80211_sta_handle_tspec_ac_params(sdata);
1773}
1774
60f8b39c 1775/* MLME */
7d25745d 1776static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
4ced3f74 1777 struct ieee80211_sub_if_data *sdata,
4a3cb702 1778 const u8 *wmm_param, size_t wmm_param_len)
f0706e82 1779{
f0706e82 1780 struct ieee80211_tx_queue_params params;
4ced3f74 1781 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 1782 size_t left;
1783 int count;
4a3cb702
JB		 1784 const u8 *pos;
1785 u8 uapsd_queues = 0;
f0706e82 1786
e1b3ec1a 1787 if (!local->ops->conf_tx)
7d25745d 1788 return false;
e1b3ec1a 1789
32c5057b 1790 if (local->hw.queues < IEEE80211_NUM_ACS)
7d25745d 1791 return false;
3434fbd3
JB		 1792
1793 if (!wmm_param)
7d25745d 1794 return false;
3434fbd3 1795
f0706e82 1796 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
7d25745d 1797 return false;
ab13315a
KV		 1798
1799 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
dc41e4d4 1800 uapsd_queues = ifmgd->uapsd_queues;
ab13315a 1801
f0706e82 1802 count = wmm_param[6] & 0x0f;
46900298 1803 if (count == ifmgd->wmm_last_param_set)
7d25745d 1804 return false;
46900298 1805 ifmgd->wmm_last_param_set = count;
f0706e82
JB		 1806
1807 pos = wmm_param + 8;
1808 left = wmm_param_len - 8;
1809
1810 memset(&params, 0, sizeof(params));
1811
00e96dec 1812 sdata->wmm_acm = 0;
f0706e82
JB		 1813 for (; left >= 4; left -= 4, pos += 4) {
1814 int aci = (pos[0] >> 5) & 0x03;
1815 int acm = (pos[0] >> 4) & 0x01;
ab13315a 1816 bool uapsd = false;
f0706e82
JB		 1817 int queue;
1818
1819 switch (aci) {
0eeb59fe 1820 case 1: /* AC_BK */
e100bb64 1821 queue = 3;
988c0f72 1822 if (acm)
00e96dec 1823 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
ab13315a
KV		 1824 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1825 uapsd = true;
f0706e82 1826 break;
0eeb59fe 1827 case 2: /* AC_VI */
e100bb64 1828 queue = 1;
988c0f72 1829 if (acm)
00e96dec 1830 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
ab13315a
KV		 1831 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1832 uapsd = true;
f0706e82 1833 break;
0eeb59fe 1834 case 3: /* AC_VO */
e100bb64 1835 queue = 0;
988c0f72 1836 if (acm)
00e96dec 1837 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
ab13315a
KV		 1838 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1839 uapsd = true;
f0706e82 1840 break;
0eeb59fe 1841 case 0: /* AC_BE */
f0706e82 1842 default:
e100bb64 1843 queue = 2;
988c0f72 1844 if (acm)
00e96dec 1845 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
ab13315a
KV		 1846 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1847 uapsd = true;
f0706e82
JB		 1848 break;
1849 }
1850
1851 params.aifs = pos[0] & 0x0f;
1852 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1853 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 1854 params.txop = get_unaligned_le16(pos + 2);
908f8d07 1855 params.acm = acm;
ab13315a
KV		 1856 params.uapsd = uapsd;
1857
bdcbd8e0 1858 mlme_dbg(sdata,
02219b3a 1859 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
bdcbd8e0
JB		 1860 queue, aci, acm,
1861 params.aifs, params.cw_min, params.cw_max,
02219b3a
JB		 1862 params.txop, params.uapsd,
1863 ifmgd->tx_tspec[queue].downgraded);
f6f3def3 1864 sdata->tx_conf[queue] = params;
02219b3a
JB		 1865 if (!ifmgd->tx_tspec[queue].downgraded &&
1866 drv_conf_tx(local, sdata, queue, &params))
bdcbd8e0
JB		 1867 sdata_err(sdata,
1868 "failed to set TX queue parameters for queue %d\n",
1869 queue);
f0706e82 1870 }
e1b3ec1a
SG		 1871
1872 /* enable WMM or activate new settings */
4ced3f74 1873 sdata->vif.bss_conf.qos = true;
7d25745d 1874 return true;
f0706e82
JB		 1875}
1876
925e64c3
SG		 1877static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1878{
1879 lockdep_assert_held(&sdata->local->mtx);
1880
392b9ffb 1881 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
925e64c3
SG		 1882 ieee80211_run_deferred_scan(sdata->local);
1883}
1884
1885static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1886{
1887 mutex_lock(&sdata->local->mtx);
1888 __ieee80211_stop_poll(sdata);
1889 mutex_unlock(&sdata->local->mtx);
1890}
1891
7a5158ef
JB		 1892static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1893 u16 capab, bool erp_valid, u8 erp)
5628221c 1894{
bda3933a 1895 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
471b3efd 1896 u32 changed = 0;
7a5158ef
JB		 1897 bool use_protection;
1898 bool use_short_preamble;
1899 bool use_short_slot;
1900
1901 if (erp_valid) {
1902 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1903 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1904 } else {
1905 use_protection = false;
1906 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1907 }
1908
1909 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
55de908a 1910 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
43d35343 1911 use_short_slot = true;
5628221c 1912
471b3efd 1913 if (use_protection != bss_conf->use_cts_prot) {
471b3efd
JB		 1914 bss_conf->use_cts_prot = use_protection;
1915 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 1916 }
7e9ed188 1917
d43c7b37 1918 if (use_short_preamble != bss_conf->use_short_preamble) {
d43c7b37 1919 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 1920 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 1921 }
d9430a32 1922
7a5158ef 1923 if (use_short_slot != bss_conf->use_short_slot) {
7a5158ef
JB		 1924 bss_conf->use_short_slot = use_short_slot;
1925 changed |= BSS_CHANGED_ERP_SLOT;
50c4afb9
JL		 1926 }
1927
1928 return changed;
1929}
1930
f698d856 1931static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
0c1ad2ca 1932 struct cfg80211_bss *cbss,
ae5eb026 1933 u32 bss_info_changed)
f0706e82 1934{
0c1ad2ca 1935 struct ieee80211_bss *bss = (void *)cbss->priv;
471b3efd 1936 struct ieee80211_local *local = sdata->local;
68542962 1937 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
d6f2da5b 1938
ae5eb026 1939 bss_info_changed |= BSS_CHANGED_ASSOC;
77fdaa12 1940 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
50ae34a2 1941 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
21c0cbe7 1942
7ccc8bd7 1943 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
59c1ec2b 1944 beacon_loss_count * bss_conf->beacon_int));
7ccc8bd7 1945
0c1ad2ca
JB		 1946 sdata->u.mgd.associated = cbss;
1947 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
f0706e82 1948
17e4ec14
JM		 1949 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1950
488dd7b5 1951 if (sdata->vif.p2p) {
9caf0364 1952 const struct cfg80211_bss_ies *ies;
488dd7b5 1953
9caf0364
JB		 1954 rcu_read_lock();
1955 ies = rcu_dereference(cbss->ies);
1956 if (ies) {
9caf0364
JB		 1957 int ret;
1958
1959 ret = cfg80211_get_p2p_attr(
1960 ies->data, ies->len,
1961 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
67baf663
JD		 1962 (u8 *) &bss_conf->p2p_noa_attr,
1963 sizeof(bss_conf->p2p_noa_attr));
9caf0364 1964 if (ret >= 2) {
67baf663
JD		 1965 sdata->u.mgd.p2p_noa_index =
1966 bss_conf->p2p_noa_attr.index;
9caf0364 1967 bss_info_changed |= BSS_CHANGED_P2P_PS;
9caf0364 1968 }
488dd7b5 1969 }
9caf0364 1970 rcu_read_unlock();
488dd7b5
JB		 1971 }
1972
b291ba11 1973 /* just to be sure */
925e64c3 1974 ieee80211_stop_poll(sdata);
b291ba11 1975
9ac19a90 1976 ieee80211_led_assoc(local, 1);
9306102e 1977
989c6505 1978 if (sdata->u.mgd.have_beacon) {
826262c3
JB		 1979 /*
1980 * If the AP is buggy we may get here with no DTIM period
1981 * known, so assume it's 1 which is the only safe assumption
1982 * in that case, although if the TIM IE is broken powersave
1983 * probably just won't work at all.
1984 */
1985 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
817cee76 1986 bss_conf->beacon_rate = bss->beacon_rate;
989c6505 1987 bss_info_changed |= BSS_CHANGED_BEACON_INFO;
826262c3 1988 } else {
817cee76 1989 bss_conf->beacon_rate = NULL;
e5b900d2 1990 bss_conf->dtim_period = 0;
826262c3 1991 }
e5b900d2 1992
68542962 1993 bss_conf->assoc = 1;
9cef8737 1994
a97c13c3 1995 /* Tell the driver to monitor connection quality (if supported) */
ea086359 1996 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
68542962 1997 bss_conf->cqm_rssi_thold)
a97c13c3
JO		 1998 bss_info_changed |= BSS_CHANGED_CQM;
1999
68542962 2000 /* Enable ARP filtering */
0f19b41e 2001 if (bss_conf->arp_addr_cnt)
68542962 2002 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
68542962 2003
ae5eb026 2004 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
f0706e82 2005
056508dc
JB		 2006 mutex_lock(&local->iflist_mtx);
2007 ieee80211_recalc_ps(local, -1);
2008 mutex_unlock(&local->iflist_mtx);
e0cb686f 2009
04ecd257 2010 ieee80211_recalc_smps(sdata);
ab095877
EP		 2011 ieee80211_recalc_ps_vif(sdata);
2012
9ac19a90 2013 netif_carrier_on(sdata->dev);
f0706e82
JB		 2014}
2015
e69e95db 2016static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
37ad3888
JB		 2017 u16 stype, u16 reason, bool tx,
2018 u8 *frame_buf)
aa458d17 2019{
46900298 2020 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
aa458d17 2021 struct ieee80211_local *local = sdata->local;
3cc5240b 2022 u32 changed = 0;
aa458d17 2023
8d61ffa5 2024 sdata_assert_lock(sdata);
77fdaa12 2025
37ad3888
JB		 2026 if (WARN_ON_ONCE(tx && !frame_buf))
2027 return;
2028
b291ba11
JB		 2029 if (WARN_ON(!ifmgd->associated))
2030 return;
2031
79543d8e
DS		 2032 ieee80211_stop_poll(sdata);
2033
77fdaa12 2034 ifmgd->associated = NULL;
aa458d17
TW		 2035 netif_carrier_off(sdata->dev);
2036
88bc40e8
EP		 2037 /*
2038 * if we want to get out of ps before disassoc (why?) we have
2039 * to do it before sending disassoc, as otherwise the null-packet
2040 * won't be valid.
2041 */
2042 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2043 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2044 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2045 }
2046 local->ps_sdata = NULL;
2047
ab095877
EP		 2048 /* disable per-vif ps */
2049 ieee80211_recalc_ps_vif(sdata);
2050
14f2ae83
EG		 2051 /* make sure ongoing transmission finishes */
2052 synchronize_net();
2053
3b24f4c6
EG		 2054 /*
2055 * drop any frame before deauth/disassoc, this can be data or
2056 * management frame. Since we are disconnecting, we should not
2057 * insist sending these frames which can take time and delay
2058 * the disconnection and possible the roaming.
2059 */
f823981e 2060 if (tx)
3b24f4c6 2061 ieee80211_flush_queues(local, sdata, true);
f823981e 2062
37ad3888
JB		 2063 /* deauthenticate/disassociate now */
2064 if (tx || frame_buf)
88a9e31c
EP		 2065 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
2066 reason, tx, frame_buf);
37ad3888 2067
3b24f4c6 2068 /* flush out frame - make sure the deauth was actually sent */
37ad3888 2069 if (tx)
3b24f4c6 2070 ieee80211_flush_queues(local, sdata, false);
37ad3888 2071
88a9e31c 2072 /* clear bssid only after building the needed mgmt frames */
c84a67a2 2073 eth_zero_addr(ifmgd->bssid);
88a9e31c 2074
37ad3888 2075 /* remove AP and TDLS peers */
d34ba216 2076 sta_info_flush(sdata);
37ad3888
JB		 2077
2078 /* finally reset all BSS / config parameters */
f5e5bf25
TW		 2079 changed |= ieee80211_reset_erp_info(sdata);
2080
f5e5bf25 2081 ieee80211_led_assoc(local, 0);
ae5eb026
JB		 2082 changed |= BSS_CHANGED_ASSOC;
2083 sdata->vif.bss_conf.assoc = false;
f5e5bf25 2084
67baf663
JD		 2085 ifmgd->p2p_noa_index = -1;
2086 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
2087 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
488dd7b5 2088
dd5ecfea 2089 /* on the next assoc, re-program HT/VHT parameters */
ef96a842
BG		 2090 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
2091 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
dd5ecfea
JB		 2092 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
2093 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
322cd406 2094 sdata->flags &= ~IEEE80211_SDATA_MU_MIMO_OWNER;
413ad50a 2095
1ea6f9c0 2096 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
a8302de9 2097
520eb820
KV		 2098 del_timer_sync(&local->dynamic_ps_timer);
2099 cancel_work_sync(&local->dynamic_ps_enable_work);
2100
68542962 2101 /* Disable ARP filtering */
0f19b41e 2102 if (sdata->vif.bss_conf.arp_addr_cnt)
68542962 2103 changed |= BSS_CHANGED_ARP_FILTER;
68542962 2104
3abead59
JB		 2105 sdata->vif.bss_conf.qos = false;
2106 changed |= BSS_CHANGED_QOS;
2107
0aaffa9b
JB		 2108 /* The BSSID (not really interesting) and HT changed */
2109 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
ae5eb026 2110 ieee80211_bss_info_change_notify(sdata, changed);
8e268e47 2111
3abead59
JB		 2112 /* disassociated - set to defaults now */
2113 ieee80211_set_wmm_default(sdata, false);
2114
b9dcf712
JB		 2115 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
2116 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
2117 del_timer_sync(&sdata->u.mgd.timer);
2118 del_timer_sync(&sdata->u.mgd.chswitch_timer);
2d9957cc 2119
826262c3 2120 sdata->vif.bss_conf.dtim_period = 0;
817cee76
AB		 2121 sdata->vif.bss_conf.beacon_rate = NULL;
2122
989c6505 2123 ifmgd->have_beacon = false;
826262c3 2124
028e8da0 2125 ifmgd->flags = 0;
34a3740d 2126 mutex_lock(&local->mtx);
028e8da0 2127 ieee80211_vif_release_channel(sdata);
59af6928
MK		 2128
2129 sdata->vif.csa_active = false;
0c21e632 2130 ifmgd->csa_waiting_bcn = false;
f84eaa10 2131 ifmgd->csa_ignored_same_chan = false;
a46992b4
LC		 2132 if (sdata->csa_block_tx) {
2133 ieee80211_wake_vif_queues(local, sdata,
2134 IEEE80211_QUEUE_STOP_REASON_CSA);
2135 sdata->csa_block_tx = false;
2136 }
34a3740d 2137 mutex_unlock(&local->mtx);
2475b1cc 2138
02219b3a
JB		 2139 /* existing TX TSPEC sessions no longer exist */
2140 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
2141 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
2142
2475b1cc 2143 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
aa458d17 2144}
f0706e82 2145
3cf335d5
KV		 2146void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
2147 struct ieee80211_hdr *hdr)
2148{
2149 /*
2150 * We can postpone the mgd.timer whenever receiving unicast frames
2151 * from AP because we know that the connection is working both ways
2152 * at that time. But multicast frames (and hence also beacons) must
2153 * be ignored here, because we need to trigger the timer during
b291ba11
JB		 2154 * data idle periods for sending the periodic probe request to the
2155 * AP we're connected to.
3cf335d5 2156 */
b291ba11
JB		 2157 if (is_multicast_ether_addr(hdr->addr1))
2158 return;
2159
be099e82 2160 ieee80211_sta_reset_conn_monitor(sdata);
3cf335d5 2161}
f0706e82 2162
4e5ff376
FF		 2163static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
2164{
2165 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
133d40f9 2166 struct ieee80211_local *local = sdata->local;
4e5ff376 2167
133d40f9 2168 mutex_lock(&local->mtx);
392b9ffb
SG		 2169 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
2170 goto out;
4e5ff376 2171
925e64c3 2172 __ieee80211_stop_poll(sdata);
133d40f9
SG		 2173
2174 mutex_lock(&local->iflist_mtx);
2175 ieee80211_recalc_ps(local, -1);
2176 mutex_unlock(&local->iflist_mtx);
4e5ff376 2177
30686bf7 2178 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
133d40f9 2179 goto out;
4e5ff376
FF		 2180
2181 /*
2182 * We've received a probe response, but are not sure whether
2183 * we have or will be receiving any beacons or data, so let's
2184 * schedule the timers again, just in case.
2185 */
2186 ieee80211_sta_reset_beacon_monitor(sdata);
2187
2188 mod_timer(&ifmgd->conn_mon_timer,
2189 round_jiffies_up(jiffies +
2190 IEEE80211_CONNECTION_IDLE_TIME));
133d40f9 2191out:
133d40f9 2192 mutex_unlock(&local->mtx);
4e5ff376
FF		 2193}
2194
02219b3a
JB		 2195static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
2196 struct ieee80211_hdr *hdr,
2197 u16 tx_time)
2198{
2199 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2200 u16 tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
2201 int ac = ieee80211_ac_from_tid(tid);
2202 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
2203 unsigned long now = jiffies;
2204
2205 if (likely(!tx_tspec->admitted_time))
2206 return;
2207
2208 if (time_after(now, tx_tspec->time_slice_start + HZ)) {
2209 tx_tspec->consumed_tx_time = 0;
2210 tx_tspec->time_slice_start = now;
2211
2212 if (tx_tspec->downgraded) {
2213 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
2214 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2215 }
2216 }
2217
2218 if (tx_tspec->downgraded)
2219 return;
2220
2221 tx_tspec->consumed_tx_time += tx_time;
2222
2223 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
2224 tx_tspec->downgraded = true;
2225 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
2226 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
2227 }
2228}
2229
4e5ff376 2230void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
02219b3a 2231 struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
4e5ff376 2232{
02219b3a
JB		 2233 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
2234
75706d0e 2235 if (!ieee80211_is_data(hdr->frame_control))
4e5ff376
FF		 2236 return;
2237
4e5ff376
FF		 2238 if (ieee80211_is_nullfunc(hdr->frame_control) &&
2239 sdata->u.mgd.probe_send_count > 0) {
04ac3c0e 2240 if (ack)
cab1c7fd 2241 ieee80211_sta_reset_conn_monitor(sdata);
04ac3c0e
FF		 2242 else
2243 sdata->u.mgd.nullfunc_failed = true;
4e5ff376 2244 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
cab1c7fd 2245 return;
4e5ff376 2246 }
cab1c7fd
WD		 2247
2248 if (ack)
2249 ieee80211_sta_reset_conn_monitor(sdata);
4e5ff376
FF		 2250}
2251
a43abf29
ML		 2252static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2253{
2254 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2255 const u8 *ssid;
f01a067d 2256 u8 *dst = ifmgd->associated->bssid;
180205bd 2257 u8 unicast_limit = max(1, max_probe_tries - 3);
f01a067d
LR		 2258
2259 /*
2260 * Try sending broadcast probe requests for the last three
2261 * probe requests after the first ones failed since some
2262 * buggy APs only support broadcast probe requests.
2263 */
2264 if (ifmgd->probe_send_count >= unicast_limit)
2265 dst = NULL;
a43abf29 2266
4e5ff376
FF		 2267 /*
2268 * When the hardware reports an accurate Tx ACK status, it's
2269 * better to send a nullfunc frame instead of a probe request,
2270 * as it will kick us off the AP quickly if we aren't associated
2271 * anymore. The timeout will be reset if the frame is ACKed by
2272 * the AP.
2273 */
992e68bf
SD		 2274 ifmgd->probe_send_count++;
2275
30686bf7 2276 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) {
04ac3c0e 2277 ifmgd->nullfunc_failed = false;
4e5ff376 2278 ieee80211_send_nullfunc(sdata->local, sdata, 0);
04ac3c0e 2279 } else {
88c868c4
SG		 2280 int ssid_len;
2281
9caf0364 2282 rcu_read_lock();
4e5ff376 2283 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
88c868c4
SG		 2284 if (WARN_ON_ONCE(ssid == NULL))
2285 ssid_len = 0;
2286 else
2287 ssid_len = ssid[1];
2288
a73f8e21 2289 ieee80211_send_probe_req(sdata, sdata->vif.addr, dst,
a344d677 2290 ssid + 2, ssid_len, NULL,
1672c0e3 2291 0, (u32) -1, true, 0,
55de908a 2292 ifmgd->associated->channel, false);
9caf0364 2293 rcu_read_unlock();
4e5ff376 2294 }
a43abf29 2295
180205bd 2296 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
8d61ffa5 2297 run_again(sdata, ifmgd->probe_timeout);
a43abf29
ML		 2298}
2299
b291ba11
JB		 2300static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2301 bool beacon)
04de8381 2302{
04de8381 2303 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 2304 bool already = false;
34bfc411 2305
9607e6b6 2306 if (!ieee80211_sdata_running(sdata))
0e2b6286
JB		 2307 return;
2308
8d61ffa5 2309 sdata_lock(sdata);
77fdaa12
JB		 2310
2311 if (!ifmgd->associated)
2312 goto out;
2313
133d40f9
SG		 2314 mutex_lock(&sdata->local->mtx);
2315
2316 if (sdata->local->tmp_channel || sdata->local->scanning) {
2317 mutex_unlock(&sdata->local->mtx);
2318 goto out;
2319 }
2320
a13fbe54 2321 if (beacon) {
bdcbd8e0 2322 mlme_dbg_ratelimited(sdata,
59c1ec2b
BG		 2323 "detected beacon loss from AP (missed %d beacons) - probing\n",
2324 beacon_loss_count);
bdcbd8e0 2325
98f03342 2326 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
a13fbe54 2327 }
04de8381 2328
b291ba11
JB		 2329 /*
2330 * The driver/our work has already reported this event or the
2331 * connection monitoring has kicked in and we have already sent
2332 * a probe request. Or maybe the AP died and the driver keeps
2333 * reporting until we disassociate...
2334 *
2335 * In either case we have to ignore the current call to this
2336 * function (except for setting the correct probe reason bit)
2337 * because otherwise we would reset the timer every time and
2338 * never check whether we received a probe response!
2339 */
392b9ffb 2340 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
b291ba11
JB		 2341 already = true;
2342
12b5f34d
EP		 2343 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2344
133d40f9
SG		 2345 mutex_unlock(&sdata->local->mtx);
2346
b291ba11
JB		 2347 if (already)
2348 goto out;
2349
4e751843
JB		 2350 mutex_lock(&sdata->local->iflist_mtx);
2351 ieee80211_recalc_ps(sdata->local, -1);
2352 mutex_unlock(&sdata->local->iflist_mtx);
2353
a43abf29
ML		 2354 ifmgd->probe_send_count = 0;
2355 ieee80211_mgd_probe_ap_send(sdata);
77fdaa12 2356 out:
8d61ffa5 2357 sdata_unlock(sdata);
04de8381
KV		 2358}
2359
a619a4c0
JO		 2360struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2361 struct ieee80211_vif *vif)
2362{
2363 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2364 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
d9b3b28b 2365 struct cfg80211_bss *cbss;
a619a4c0
JO		 2366 struct sk_buff *skb;
2367 const u8 *ssid;
88c868c4 2368 int ssid_len;
a619a4c0
JO		 2369
2370 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2371 return NULL;
2372
8d61ffa5 2373 sdata_assert_lock(sdata);
a619a4c0 2374
d9b3b28b
EP		 2375 if (ifmgd->associated)
2376 cbss = ifmgd->associated;
2377 else if (ifmgd->auth_data)
2378 cbss = ifmgd->auth_data->bss;
2379 else if (ifmgd->assoc_data)
2380 cbss = ifmgd->assoc_data->bss;
2381 else
a619a4c0
JO		 2382 return NULL;
2383
9caf0364 2384 rcu_read_lock();
d9b3b28b 2385 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
88c868c4
SG		 2386 if (WARN_ON_ONCE(ssid == NULL))
2387 ssid_len = 0;
2388 else
2389 ssid_len = ssid[1];
2390
a344d677 2391 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
55de908a 2392 (u32) -1, cbss->channel,
6b77863b 2393 ssid + 2, ssid_len,
85a237fe 2394 NULL, 0, true);
9caf0364 2395 rcu_read_unlock();
a619a4c0
JO		 2396
2397 return skb;
2398}
2399EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2400
a90faa9d
EG		 2401static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata,
2402 const u8 *buf, size_t len, bool tx,
2403 u16 reason)
2404{
2405 struct ieee80211_event event = {
2406 .type = MLME_EVENT,
2407 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT,
2408 .u.mlme.reason = reason,
2409 };
2410
2411 if (tx)
2412 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len);
2413 else
2414 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len);
2415
2416 drv_event_callback(sdata->local, sdata, &event);
2417}
2418
eef9e54c 2419static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
1e4dcd01 2420{
59af6928 2421 struct ieee80211_local *local = sdata->local;
1e4dcd01 2422 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 2423 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
1e4dcd01 2424
8d61ffa5 2425 sdata_lock(sdata);
1e4dcd01 2426 if (!ifmgd->associated) {
8d61ffa5 2427 sdata_unlock(sdata);
1e4dcd01
JO		 2428 return;
2429 }
2430
37ad3888
JB		 2431 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2432 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
eef9e54c 2433 true, frame_buf);
59af6928 2434 mutex_lock(&local->mtx);
7578d575 2435 sdata->vif.csa_active = false;
0c21e632 2436 ifmgd->csa_waiting_bcn = false;
a46992b4
LC		 2437 if (sdata->csa_block_tx) {
2438 ieee80211_wake_vif_queues(local, sdata,
2439 IEEE80211_QUEUE_STOP_REASON_CSA);
2440 sdata->csa_block_tx = false;
2441 }
59af6928 2442 mutex_unlock(&local->mtx);
7da7cc1d 2443
a90faa9d
EG		 2444 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
2445 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
2446
8d61ffa5 2447 sdata_unlock(sdata);
1e4dcd01
JO		 2448}
2449
cc74c0c7 2450static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
b291ba11
JB		 2451{
2452 struct ieee80211_sub_if_data *sdata =
2453 container_of(work, struct ieee80211_sub_if_data,
1e4dcd01 2454 u.mgd.beacon_connection_loss_work);
a85e1d55
PS		 2455 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2456 struct sta_info *sta;
2457
2458 if (ifmgd->associated) {
30fa9047 2459 rcu_read_lock();
a85e1d55
PS		 2460 sta = sta_info_get(sdata, ifmgd->bssid);
2461 if (sta)
2462 sta->beacon_loss_count++;
30fa9047 2463 rcu_read_unlock();
a85e1d55 2464 }
b291ba11 2465
682bd38b 2466 if (ifmgd->connection_loss) {
882a7c69
JB		 2467 sdata_info(sdata, "Connection to AP %pM lost\n",
2468 ifmgd->bssid);
eef9e54c 2469 __ieee80211_disconnect(sdata);
882a7c69 2470 } else {
1e4dcd01 2471 ieee80211_mgd_probe_ap(sdata, true);
882a7c69
JB		 2472 }
2473}
2474
2475static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2476{
2477 struct ieee80211_sub_if_data *sdata =
2478 container_of(work, struct ieee80211_sub_if_data,
2479 u.mgd.csa_connection_drop_work);
2480
eef9e54c 2481 __ieee80211_disconnect(sdata);
b291ba11
JB		 2482}
2483
04de8381
KV		 2484void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2485{
2486 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1e4dcd01 2487 struct ieee80211_hw *hw = &sdata->local->hw;
04de8381 2488
b5878a2d
JB		 2489 trace_api_beacon_loss(sdata);
2490
682bd38b 2491 sdata->u.mgd.connection_loss = false;
1e4dcd01 2492 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
04de8381
KV		 2493}
2494EXPORT_SYMBOL(ieee80211_beacon_loss);
2495
1e4dcd01
JO		 2496void ieee80211_connection_loss(struct ieee80211_vif *vif)
2497{
2498 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2499 struct ieee80211_hw *hw = &sdata->local->hw;
2500
b5878a2d
JB		 2501 trace_api_connection_loss(sdata);
2502
682bd38b 2503 sdata->u.mgd.connection_loss = true;
1e4dcd01
JO		 2504 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2505}
2506EXPORT_SYMBOL(ieee80211_connection_loss);
2507
2508
66e67e41
JB		 2509static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2510 bool assoc)
2511{
2512 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2513
8d61ffa5 2514 sdata_assert_lock(sdata);
66e67e41 2515
66e67e41 2516 if (!assoc) {
c1e140bf
EG		 2517 /*
2518 * we are not authenticated yet, the only timer that could be
2519 * running is the timeout for the authentication response which
2520 * which is not relevant anymore.
2521 */
2522 del_timer_sync(&sdata->u.mgd.timer);
66e67e41
JB		 2523 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2524
c84a67a2 2525 eth_zero_addr(sdata->u.mgd.bssid);
66e67e41 2526 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
028e8da0 2527 sdata->u.mgd.flags = 0;
34a3740d 2528 mutex_lock(&sdata->local->mtx);
55de908a 2529 ieee80211_vif_release_channel(sdata);
34a3740d 2530 mutex_unlock(&sdata->local->mtx);
66e67e41
JB		 2531 }
2532
5b112d3d 2533 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
66e67e41
JB		 2534 kfree(auth_data);
2535 sdata->u.mgd.auth_data = NULL;
2536}
2537
c9c99f89
JB		 2538static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2539 bool assoc)
2540{
2541 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2542
2543 sdata_assert_lock(sdata);
2544
2545 if (!assoc) {
2546 /*
2547 * we are not associated yet, the only timer that could be
2548 * running is the timeout for the association response which
2549 * which is not relevant anymore.
2550 */
2551 del_timer_sync(&sdata->u.mgd.timer);
2552 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2553
2554 eth_zero_addr(sdata->u.mgd.bssid);
2555 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2556 sdata->u.mgd.flags = 0;
322cd406 2557 sdata->flags &= ~IEEE80211_SDATA_MU_MIMO_OWNER;
c9c99f89
JB		 2558 mutex_lock(&sdata->local->mtx);
2559 ieee80211_vif_release_channel(sdata);
2560 mutex_unlock(&sdata->local->mtx);
2561 }
2562
2563 kfree(assoc_data);
2564 sdata->u.mgd.assoc_data = NULL;
2565}
2566
66e67e41
JB		 2567static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2568 struct ieee80211_mgmt *mgmt, size_t len)
2569{
1672c0e3 2570 struct ieee80211_local *local = sdata->local;
66e67e41
JB		 2571 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2572 u8 *pos;
2573 struct ieee802_11_elems elems;
1672c0e3 2574 u32 tx_flags = 0;
66e67e41
JB		 2575
2576 pos = mgmt->u.auth.variable;
b2e506bf 2577 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
66e67e41
JB		 2578 if (!elems.challenge)
2579 return;
2580 auth_data->expected_transaction = 4;
a1845fc7 2581 drv_mgd_prepare_tx(sdata->local, sdata);
30686bf7 2582 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
1672c0e3
JB		 2583 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2584 IEEE80211_TX_INTFL_MLME_CONN_TX;
700e8ea6 2585 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
66e67e41
JB		 2586 elems.challenge - 2, elems.challenge_len + 2,
2587 auth_data->bss->bssid, auth_data->bss->bssid,
2588 auth_data->key, auth_data->key_len,
1672c0e3 2589 auth_data->key_idx, tx_flags);
66e67e41
JB		 2590}
2591
8d61ffa5
JB		 2592static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2593 struct ieee80211_mgmt *mgmt, size_t len)
66e67e41
JB		 2594{
2595 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2596 u8 bssid[ETH_ALEN];
2597 u16 auth_alg, auth_transaction, status_code;
2598 struct sta_info *sta;
a9409093
EG		 2599 struct ieee80211_event event = {
2600 .type = MLME_EVENT,
2601 .u.mlme.data = AUTH_EVENT,
2602 };
66e67e41 2603
8d61ffa5 2604 sdata_assert_lock(sdata);
66e67e41
JB		 2605
2606 if (len < 24 + 6)
8d61ffa5 2607 return;
66e67e41
JB		 2608
2609 if (!ifmgd->auth_data || ifmgd->auth_data->done)
8d61ffa5 2610 return;
66e67e41
JB		 2611
2612 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2613
b203ca39 2614 if (!ether_addr_equal(bssid, mgmt->bssid))
8d61ffa5 2615 return;
66e67e41
JB		 2616
2617 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2618 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2619 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2620
2621 if (auth_alg != ifmgd->auth_data->algorithm ||
0f4126e8
JM		 2622 auth_transaction != ifmgd->auth_data->expected_transaction) {
2623 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2624 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2625 auth_transaction,
2626 ifmgd->auth_data->expected_transaction);
8d61ffa5 2627 return;
0f4126e8 2628 }
66e67e41
JB		 2629
2630 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 2631 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2632 mgmt->sa, status_code);
dac211ec 2633 ieee80211_destroy_auth_data(sdata, false);
6ff57cf8 2634 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
a9409093
EG		 2635 event.u.mlme.status = MLME_DENIED;
2636 event.u.mlme.reason = status_code;
2637 drv_event_callback(sdata->local, sdata, &event);
8d61ffa5 2638 return;
66e67e41
JB		 2639 }
2640
2641 switch (ifmgd->auth_data->algorithm) {
2642 case WLAN_AUTH_OPEN:
2643 case WLAN_AUTH_LEAP:
2644 case WLAN_AUTH_FT:
6b8ece3a 2645 case WLAN_AUTH_SAE:
66e67e41
JB		 2646 break;
2647 case WLAN_AUTH_SHARED_KEY:
2648 if (ifmgd->auth_data->expected_transaction != 4) {
2649 ieee80211_auth_challenge(sdata, mgmt, len);
2650 /* need another frame */
8d61ffa5 2651 return;
66e67e41
JB		 2652 }
2653 break;
2654 default:
2655 WARN_ONCE(1, "invalid auth alg %d",
2656 ifmgd->auth_data->algorithm);
8d61ffa5 2657 return;
66e67e41
JB		 2658 }
2659
a9409093
EG		 2660 event.u.mlme.status = MLME_SUCCESS;
2661 drv_event_callback(sdata->local, sdata, &event);
bdcbd8e0 2662 sdata_info(sdata, "authenticated\n");
66e67e41
JB		 2663 ifmgd->auth_data->done = true;
2664 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
89afe614 2665 ifmgd->auth_data->timeout_started = true;
8d61ffa5 2666 run_again(sdata, ifmgd->auth_data->timeout);
66e67e41 2667
6b8ece3a
JM		 2668 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2669 ifmgd->auth_data->expected_transaction != 2) {
2670 /*
2671 * Report auth frame to user space for processing since another
2672 * round of Authentication frames is still needed.
2673 */
6ff57cf8 2674 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
8d61ffa5 2675 return;
6b8ece3a
JM		 2676 }
2677
66e67e41
JB		 2678 /* move station state to auth */
2679 mutex_lock(&sdata->local->sta_mtx);
2680 sta = sta_info_get(sdata, bssid);
2681 if (!sta) {
2682 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2683 goto out_err;
2684 }
2685 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
bdcbd8e0 2686 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
66e67e41
JB		 2687 goto out_err;
2688 }
2689 mutex_unlock(&sdata->local->sta_mtx);
2690
6ff57cf8 2691 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
8d61ffa5 2692 return;
66e67e41
JB		 2693 out_err:
2694 mutex_unlock(&sdata->local->sta_mtx);
2695 /* ignore frame -- wait for timeout */
66e67e41
JB		 2696}
2697
dfa1ad29
CO		 2698#define case_WLAN(type) \
2699 case WLAN_REASON_##type: return #type
2700
2701static const char *ieee80211_get_reason_code_string(u16 reason_code)
2702{
2703 switch (reason_code) {
2704 case_WLAN(UNSPECIFIED);
2705 case_WLAN(PREV_AUTH_NOT_VALID);
2706 case_WLAN(DEAUTH_LEAVING);
2707 case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
2708 case_WLAN(DISASSOC_AP_BUSY);
2709 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
2710 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
2711 case_WLAN(DISASSOC_STA_HAS_LEFT);
2712 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
2713 case_WLAN(DISASSOC_BAD_POWER);
2714 case_WLAN(DISASSOC_BAD_SUPP_CHAN);
2715 case_WLAN(INVALID_IE);
2716 case_WLAN(MIC_FAILURE);
2717 case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
2718 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
2719 case_WLAN(IE_DIFFERENT);
2720 case_WLAN(INVALID_GROUP_CIPHER);
2721 case_WLAN(INVALID_PAIRWISE_CIPHER);
2722 case_WLAN(INVALID_AKMP);
2723 case_WLAN(UNSUPP_RSN_VERSION);
2724 case_WLAN(INVALID_RSN_IE_CAP);
2725 case_WLAN(IEEE8021X_FAILED);
2726 case_WLAN(CIPHER_SUITE_REJECTED);
2727 case_WLAN(DISASSOC_UNSPECIFIED_QOS);
2728 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
2729 case_WLAN(DISASSOC_LOW_ACK);
2730 case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
2731 case_WLAN(QSTA_LEAVE_QBSS);
2732 case_WLAN(QSTA_NOT_USE);
2733 case_WLAN(QSTA_REQUIRE_SETUP);
2734 case_WLAN(QSTA_TIMEOUT);
2735 case_WLAN(QSTA_CIPHER_NOT_SUPP);
2736 case_WLAN(MESH_PEER_CANCELED);
2737 case_WLAN(MESH_MAX_PEERS);
2738 case_WLAN(MESH_CONFIG);
2739 case_WLAN(MESH_CLOSE);
2740 case_WLAN(MESH_MAX_RETRIES);
2741 case_WLAN(MESH_CONFIRM_TIMEOUT);
2742 case_WLAN(MESH_INVALID_GTK);
2743 case_WLAN(MESH_INCONSISTENT_PARAM);
2744 case_WLAN(MESH_INVALID_SECURITY);
2745 case_WLAN(MESH_PATH_ERROR);
2746 case_WLAN(MESH_PATH_NOFORWARD);
2747 case_WLAN(MESH_PATH_DEST_UNREACHABLE);
2748 case_WLAN(MAC_EXISTS_IN_MBSS);
2749 case_WLAN(MESH_CHAN_REGULATORY);
2750 case_WLAN(MESH_CHAN);
2751 default: return "<unknown>";
2752 }
2753}
66e67e41 2754
8d61ffa5
JB		 2755static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2756 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2757{
46900298 2758 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
c9c99f89 2759 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
f0706e82 2760
8d61ffa5 2761 sdata_assert_lock(sdata);
66e67e41 2762
f4ea83dd 2763 if (len < 24 + 2)
8d61ffa5 2764 return;
f0706e82 2765
c9c99f89
JB		 2766 if (ifmgd->associated &&
2767 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) {
2768 const u8 *bssid = ifmgd->associated->bssid;
77fdaa12 2769
c9c99f89
JB		 2770 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
2771 bssid, reason_code,
2772 ieee80211_get_reason_code_string(reason_code));
f0706e82 2773
c9c99f89 2774 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
f0706e82 2775
c9c99f89
JB		 2776 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false,
2777 reason_code);
2778 return;
2779 }
77fdaa12 2780
c9c99f89
JB		 2781 if (ifmgd->assoc_data &&
2782 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
2783 const u8 *bssid = ifmgd->assoc_data->bss->bssid;
37ad3888 2784
c9c99f89
JB		 2785 sdata_info(sdata,
2786 "deauthenticated from %pM while associating (Reason: %u=%s)\n",
2787 bssid, reason_code,
2788 ieee80211_get_reason_code_string(reason_code));
2789
2790 ieee80211_destroy_assoc_data(sdata, false);
2791
2792 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
2793 return;
2794 }
f0706e82
JB		 2795}
2796
2797
8d61ffa5
JB		 2798static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2799 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2800{
46900298 2801 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
f0706e82
JB		 2802 u16 reason_code;
2803
8d61ffa5 2804 sdata_assert_lock(sdata);
77fdaa12 2805
66e67e41 2806 if (len < 24 + 2)
8d61ffa5 2807 return;
77fdaa12 2808
66e67e41 2809 if (!ifmgd->associated ||
b203ca39 2810 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
8d61ffa5 2811 return;
f0706e82
JB		 2812
2813 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2814
bdcbd8e0
JB		 2815 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2816 mgmt->sa, reason_code);
f0706e82 2817
37ad3888
JB		 2818 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2819
a90faa9d 2820 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code);
f0706e82
JB		 2821}
2822
c74d084f
CL		 2823static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2824 u8 *supp_rates, unsigned int supp_rates_len,
2825 u32 *rates, u32 *basic_rates,
2826 bool *have_higher_than_11mbit,
2103dec1
SW		 2827 int *min_rate, int *min_rate_index,
2828 int shift, u32 rate_flags)
c74d084f
CL		 2829{
2830 int i, j;
2831
2832 for (i = 0; i < supp_rates_len; i++) {
2103dec1 2833 int rate = supp_rates[i] & 0x7f;
c74d084f
CL		 2834 bool is_basic = !!(supp_rates[i] & 0x80);
2835
2103dec1 2836 if ((rate * 5 * (1 << shift)) > 110)
c74d084f
CL		 2837 *have_higher_than_11mbit = true;
2838
2839 /*
2840 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2841 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2842 *
2843 * Note: Even through the membership selector and the basic
2844 * rate flag share the same bit, they are not exactly
2845 * the same.
2846 */
2847 if (!!(supp_rates[i] & 0x80) &&
2848 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2849 continue;
2850
2851 for (j = 0; j < sband->n_bitrates; j++) {
2103dec1
SW		 2852 struct ieee80211_rate *br;
2853 int brate;
2854
2855 br = &sband->bitrates[j];
2856 if ((rate_flags & br->flags) != rate_flags)
2857 continue;
2858
2859 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2860 if (brate == rate) {
c74d084f
CL		 2861 *rates |= BIT(j);
2862 if (is_basic)
2863 *basic_rates |= BIT(j);
2103dec1
SW		 2864 if ((rate * 5) < *min_rate) {
2865 *min_rate = rate * 5;
c74d084f
CL		 2866 *min_rate_index = j;
2867 }
2868 break;
2869 }
2870 }
2871 }
2872}
f0706e82 2873
66e67e41
JB		 2874static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2875 struct cfg80211_bss *cbss,
af6b6374 2876 struct ieee80211_mgmt *mgmt, size_t len)
f0706e82 2877{
46900298 2878 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
471b3efd 2879 struct ieee80211_local *local = sdata->local;
8318d78a 2880 struct ieee80211_supported_band *sband;
f0706e82 2881 struct sta_info *sta;
af6b6374 2882 u8 *pos;
af6b6374 2883 u16 capab_info, aid;
f0706e82 2884 struct ieee802_11_elems elems;
bda3933a 2885 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
35d865af
JB		 2886 const struct cfg80211_bss_ies *bss_ies = NULL;
2887 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
ae5eb026 2888 u32 changed = 0;
c74d084f 2889 int err;
35d865af 2890 bool ret;
f0706e82 2891
af6b6374 2892 /* AssocResp and ReassocResp have identical structure */
f0706e82 2893
f0706e82 2894 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
af6b6374 2895 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
f0706e82 2896
1dd84aa2 2897 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
bdcbd8e0
JB		 2898 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2899 aid);
1dd84aa2
JB		 2900 aid &= ~(BIT(15) | BIT(14));
2901
05cb9108
JB		 2902 ifmgd->broken_ap = false;
2903
2904 if (aid == 0 || aid > IEEE80211_MAX_AID) {
bdcbd8e0
JB		 2905 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2906 aid);
05cb9108
JB		 2907 aid = 0;
2908 ifmgd->broken_ap = true;
2909 }
2910
af6b6374 2911 pos = mgmt->u.assoc_resp.variable;
b2e506bf 2912 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
af6b6374 2913
f0706e82 2914 if (!elems.supp_rates) {
bdcbd8e0 2915 sdata_info(sdata, "no SuppRates element in AssocResp\n");
af6b6374 2916 return false;
f0706e82
JB		 2917 }
2918
46900298 2919 ifmgd->aid = aid;
9041c1fa
AN		 2920 ifmgd->tdls_chan_switch_prohibited =
2921 elems.ext_capab && elems.ext_capab_len >= 5 &&
2922 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
f0706e82 2923
35d865af
JB		 2924 /*
2925 * Some APs are erroneously not including some information in their
2926 * (re)association response frames. Try to recover by using the data
2927 * from the beacon or probe response. This seems to afflict mobile
2928 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
2929 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
2930 */
2931 if ((assoc_data->wmm && !elems.wmm_param) ||
2932 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2933 (!elems.ht_cap_elem || !elems.ht_operation)) ||
2934 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2935 (!elems.vht_cap_elem || !elems.vht_operation))) {
2936 const struct cfg80211_bss_ies *ies;
2937 struct ieee802_11_elems bss_elems;
2938
2939 rcu_read_lock();
2940 ies = rcu_dereference(cbss->ies);
2941 if (ies)
2942 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
2943 GFP_ATOMIC);
2944 rcu_read_unlock();
2945 if (!bss_ies)
2946 return false;
2947
2948 ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
2949 false, &bss_elems);
2950 if (assoc_data->wmm &&
2951 !elems.wmm_param && bss_elems.wmm_param) {
2952 elems.wmm_param = bss_elems.wmm_param;
2953 sdata_info(sdata,
2954 "AP bug: WMM param missing from AssocResp\n");
2955 }
2956
2957 /*
2958 * Also check if we requested HT/VHT, otherwise the AP doesn't
2959 * have to include the IEs in the (re)association response.
2960 */
2961 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
2962 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2963 elems.ht_cap_elem = bss_elems.ht_cap_elem;
2964 sdata_info(sdata,
2965 "AP bug: HT capability missing from AssocResp\n");
2966 }
2967 if (!elems.ht_operation && bss_elems.ht_operation &&
2968 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
2969 elems.ht_operation = bss_elems.ht_operation;
2970 sdata_info(sdata,
2971 "AP bug: HT operation missing from AssocResp\n");
2972 }
2973 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
2974 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2975 elems.vht_cap_elem = bss_elems.vht_cap_elem;
2976 sdata_info(sdata,
2977 "AP bug: VHT capa missing from AssocResp\n");
2978 }
2979 if (!elems.vht_operation && bss_elems.vht_operation &&
2980 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
2981 elems.vht_operation = bss_elems.vht_operation;
2982 sdata_info(sdata,
2983 "AP bug: VHT operation missing from AssocResp\n");
2984 }
2985 }
2986
30eb1dc2
JB		 2987 /*
2988 * We previously checked these in the beacon/probe response, so
2989 * they should be present here. This is just a safety net.
2990 */
2991 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2992 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2993 sdata_info(sdata,
35d865af
JB		 2994 "HT AP is missing WMM params or HT capability/operation\n");
2995 ret = false;
2996 goto out;
30eb1dc2
JB		 2997 }
2998
2999 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3000 (!elems.vht_cap_elem || !elems.vht_operation)) {
3001 sdata_info(sdata,
35d865af
JB		 3002 "VHT AP is missing VHT capability/operation\n");
3003 ret = false;
3004 goto out;
30eb1dc2
JB		 3005 }
3006
2a33bee2
GE		 3007 mutex_lock(&sdata->local->sta_mtx);
3008 /*
3009 * station info was already allocated and inserted before
3010 * the association and should be available to us
3011 */
7852e361 3012 sta = sta_info_get(sdata, cbss->bssid);
2a33bee2
GE		 3013 if (WARN_ON(!sta)) {
3014 mutex_unlock(&sdata->local->sta_mtx);
35d865af
JB		 3015 ret = false;
3016 goto out;
77fdaa12 3017 }
05e5e883 3018
55de908a 3019 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
f709fc69 3020
30eb1dc2 3021 /* Set up internal HT/VHT capabilities */
a8243b72 3022 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
ef96a842 3023 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
e1a0c6b3 3024 elems.ht_cap_elem, sta);
64f68e5d 3025
818255ea
MP		 3026 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
3027 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
4a34215e 3028 elems.vht_cap_elem, sta);
818255ea 3029
30eb1dc2
JB		 3030 /*
3031 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
3032 * in their association response, so ignore that data for our own
3033 * configuration. If it changed since the last beacon, we'll get the
3034 * next beacon and update then.
3035 */
1128958d 3036
bee7f586
JB		 3037 /*
3038 * If an operating mode notification IE is present, override the
3039 * NSS calculation (that would be done in rate_control_rate_init())
3040 * and use the # of streams from that element.
3041 */
3042 if (elems.opmode_notif &&
3043 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
3044 u8 nss;
3045
3046 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
3047 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
3048 nss += 1;
3049 sta->sta.rx_nss = nss;
3050 }
3051
4b7679a5 3052 rate_control_rate_init(sta);
f0706e82 3053
5c48f120 3054 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
c2c98fde 3055 set_sta_flag(sta, WLAN_STA_MFP);
5394af4d 3056
527871d7 3057 sta->sta.wme = elems.wmm_param && local->hw.queues >= IEEE80211_NUM_ACS;
ddf4ac53 3058
3e4d40fa 3059 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
c8987876
JB		 3060 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
3061 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
3062 if (err) {
bdcbd8e0
JB		 3063 sdata_info(sdata,
3064 "failed to move station %pM to desired state\n",
3065 sta->sta.addr);
c8987876
JB		 3066 WARN_ON(__sta_info_destroy(sta));
3067 mutex_unlock(&sdata->local->sta_mtx);
35d865af
JB		 3068 ret = false;
3069 goto out;
c8987876
JB		 3070 }
3071
7852e361 3072 mutex_unlock(&sdata->local->sta_mtx);
ddf4ac53 3073
f2176d72
JO		 3074 /*
3075 * Always handle WMM once after association regardless
3076 * of the first value the AP uses. Setting -1 here has
3077 * that effect because the AP values is an unsigned
3078 * 4-bit value.
3079 */
3080 ifmgd->wmm_last_param_set = -1;
3081
095d81ce 3082 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && elems.wmm_param)
4ced3f74 3083 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
60f8b39c 3084 elems.wmm_param_len);
aa837e1d 3085 else
3abead59
JB		 3086 ieee80211_set_wmm_default(sdata, false);
3087 changed |= BSS_CHANGED_QOS;
f0706e82 3088
60f8b39c
JB		 3089 /* set AID and assoc capability,
3090 * ieee80211_set_associated() will tell the driver */
3091 bss_conf->aid = aid;
3092 bss_conf->assoc_capability = capab_info;
0c1ad2ca 3093 ieee80211_set_associated(sdata, cbss, changed);
f0706e82 3094
d524215f
FF		 3095 /*
3096 * If we're using 4-addr mode, let the AP know that we're
3097 * doing so, so that it can create the STA VLAN on its side
3098 */
3099 if (ifmgd->use_4addr)
3100 ieee80211_send_4addr_nullfunc(local, sdata);
3101
15b7b062 3102 /*
b291ba11
JB		 3103 * Start timer to probe the connection to the AP now.
3104 * Also start the timer that will detect beacon loss.
15b7b062 3105 */
b291ba11 3106 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
d3a910a8 3107 ieee80211_sta_reset_beacon_monitor(sdata);
15b7b062 3108
35d865af
JB		 3109 ret = true;
3110 out:
3111 kfree(bss_ies);
3112 return ret;
f0706e82
JB		 3113}
3114
8d61ffa5
JB		 3115static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
3116 struct ieee80211_mgmt *mgmt,
3117 size_t len)
66e67e41
JB		 3118{
3119 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3120 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
3121 u16 capab_info, status_code, aid;
3122 struct ieee802_11_elems elems;
b0b6aa2c 3123 int ac, uapsd_queues = -1;
66e67e41
JB		 3124 u8 *pos;
3125 bool reassoc;
8d61ffa5 3126 struct cfg80211_bss *bss;
d0d1a12f
EG		 3127 struct ieee80211_event event = {
3128 .type = MLME_EVENT,
3129 .u.mlme.data = ASSOC_EVENT,
3130 };
66e67e41 3131
8d61ffa5 3132 sdata_assert_lock(sdata);
66e67e41
JB		 3133
3134 if (!assoc_data)
8d61ffa5 3135 return;
b203ca39 3136 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
8d61ffa5 3137 return;
66e67e41
JB		 3138
3139 /*
3140 * AssocResp and ReassocResp have identical structure, so process both
3141 * of them in this function.
3142 */
3143
3144 if (len < 24 + 6)
8d61ffa5 3145 return;
66e67e41
JB		 3146
3147 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
3148 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
3149 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
3150 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
3151
bdcbd8e0
JB		 3152 sdata_info(sdata,
3153 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
3154 reassoc ? "Rea" : "A", mgmt->sa,
3155 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
66e67e41
JB		 3156
3157 pos = mgmt->u.assoc_resp.variable;
b2e506bf 3158 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
66e67e41
JB		 3159
3160 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
79ba1d89
JB		 3161 elems.timeout_int &&
3162 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
66e67e41 3163 u32 tu, ms;
79ba1d89 3164 tu = le32_to_cpu(elems.timeout_int->value);
66e67e41 3165 ms = tu * 1024 / 1000;
bdcbd8e0
JB		 3166 sdata_info(sdata,
3167 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
3168 mgmt->sa, tu, ms);
66e67e41 3169 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
89afe614 3170 assoc_data->timeout_started = true;
66e67e41 3171 if (ms > IEEE80211_ASSOC_TIMEOUT)
8d61ffa5
JB		 3172 run_again(sdata, assoc_data->timeout);
3173 return;
66e67e41
JB		 3174 }
3175
8d61ffa5 3176 bss = assoc_data->bss;
66e67e41
JB		 3177
3178 if (status_code != WLAN_STATUS_SUCCESS) {
bdcbd8e0
JB		 3179 sdata_info(sdata, "%pM denied association (code=%d)\n",
3180 mgmt->sa, status_code);
66e67e41 3181 ieee80211_destroy_assoc_data(sdata, false);
d0d1a12f
EG		 3182 event.u.mlme.status = MLME_DENIED;
3183 event.u.mlme.reason = status_code;
3184 drv_event_callback(sdata->local, sdata, &event);
66e67e41 3185 } else {
8d61ffa5 3186 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
66e67e41 3187 /* oops -- internal error -- send timeout for now */
10a9109f 3188 ieee80211_destroy_assoc_data(sdata, false);
959867fa 3189 cfg80211_assoc_timeout(sdata->dev, bss);
8d61ffa5 3190 return;
66e67e41 3191 }
d0d1a12f
EG		 3192 event.u.mlme.status = MLME_SUCCESS;
3193 drv_event_callback(sdata->local, sdata, &event);
635d999f 3194 sdata_info(sdata, "associated\n");
79ebfb85
JB		 3195
3196 /*
3197 * destroy assoc_data afterwards, as otherwise an idle
3198 * recalc after assoc_data is NULL but before associated
3199 * is set can cause the interface to go idle
3200 */
3201 ieee80211_destroy_assoc_data(sdata, true);
b0b6aa2c
EP		 3202
3203 /* get uapsd queues configuration */
3204 uapsd_queues = 0;
3205 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
3206 if (sdata->tx_conf[ac].uapsd)
3207 uapsd_queues |= BIT(ac);
66e67e41
JB		 3208 }
3209
b0b6aa2c 3210 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues);
66e67e41 3211}
8e3c1b77 3212
98c8fccf 3213static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
8e3c1b77 3214 struct ieee80211_mgmt *mgmt, size_t len,
98c8fccf 3215 struct ieee80211_rx_status *rx_status,
d45c4172 3216 struct ieee802_11_elems *elems)
98c8fccf
JB		 3217{
3218 struct ieee80211_local *local = sdata->local;
c2b13452 3219 struct ieee80211_bss *bss;
98c8fccf 3220 struct ieee80211_channel *channel;
56007a02 3221
8d61ffa5 3222 sdata_assert_lock(sdata);
b4f286a1 3223
3afc2167
EG		 3224 channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
3225 if (!channel)
98c8fccf
JB		 3226 return;
3227
98c8fccf 3228 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
d45c4172 3229 channel);
817cee76 3230 if (bss) {
817cee76 3231 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
d2722f8b 3232 ieee80211_rx_bss_put(local, bss);
817cee76 3233 }
f0706e82
JB		 3234}
3235
3236
f698d856 3237static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
af6b6374 3238 struct sk_buff *skb)
f0706e82 3239{
af6b6374 3240 struct ieee80211_mgmt *mgmt = (void *)skb->data;
15b7b062 3241 struct ieee80211_if_managed *ifmgd;
af6b6374
JB		 3242 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
3243 size_t baselen, len = skb->len;
ae6a44e3
EK		 3244 struct ieee802_11_elems elems;
3245
15b7b062
KV		 3246 ifmgd = &sdata->u.mgd;
3247
8d61ffa5 3248 sdata_assert_lock(sdata);
77fdaa12 3249
b203ca39 3250 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
8e7cdbb6
TW		 3251 return; /* ignore ProbeResp to foreign address */
3252
ae6a44e3
EK		 3253 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
3254 if (baselen > len)
3255 return;
3256
3257 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
b2e506bf 3258 false, &elems);
ae6a44e3 3259
d45c4172 3260 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
9859b81e 3261
77fdaa12 3262 if (ifmgd->associated &&
b203ca39 3263 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
4e5ff376 3264 ieee80211_reset_ap_probe(sdata);
66e67e41
JB		 3265
3266 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
b203ca39 3267 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
66e67e41 3268 /* got probe response, continue with auth */
bdcbd8e0 3269 sdata_info(sdata, "direct probe responded\n");
66e67e41
JB		 3270 ifmgd->auth_data->tries = 0;
3271 ifmgd->auth_data->timeout = jiffies;
89afe614 3272 ifmgd->auth_data->timeout_started = true;
8d61ffa5 3273 run_again(sdata, ifmgd->auth_data->timeout);
66e67e41 3274 }
f0706e82
JB		 3275}
3276
d91f36db
JB		 3277/*
3278 * This is the canonical list of information elements we care about,
3279 * the filter code also gives us all changes to the Microsoft OUI
c8d65917
SG		 3280 * (00:50:F2) vendor IE which is used for WMM which we need to track,
3281 * as well as the DTPC IE (part of the Cisco OUI) used for signaling
3282 * changes to requested client power.
d91f36db
JB		 3283 *
3284 * We implement beacon filtering in software since that means we can
3285 * avoid processing the frame here and in cfg80211, and userspace
3286 * will not be able to tell whether the hardware supports it or not.
3287 *
3288 * XXX: This list needs to be dynamic -- userspace needs to be able to
3289 * add items it requires. It also needs to be able to tell us to
3290 * look out for other vendor IEs.
3291 */
3292static const u64 care_about_ies =
1d4df3a5
JB		 3293 (1ULL << WLAN_EID_COUNTRY) |
3294 (1ULL << WLAN_EID_ERP_INFO) |
3295 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
3296 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
3297 (1ULL << WLAN_EID_HT_CAPABILITY) |
70a3fd6c
JB		 3298 (1ULL << WLAN_EID_HT_OPERATION) |
3299 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN);
d91f36db 3300
8d61ffa5
JB		 3301static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
3302 struct ieee80211_mgmt *mgmt, size_t len,
3303 struct ieee80211_rx_status *rx_status)
f0706e82 3304{
d91f36db 3305 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
17e4ec14 3306 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
f0706e82
JB		 3307 size_t baselen;
3308 struct ieee802_11_elems elems;
f698d856 3309 struct ieee80211_local *local = sdata->local;
55de908a
JB		 3310 struct ieee80211_chanctx_conf *chanctx_conf;
3311 struct ieee80211_channel *chan;
bee7f586 3312 struct sta_info *sta;
471b3efd 3313 u32 changed = 0;
f87ad637 3314 bool erp_valid;
7a5158ef 3315 u8 erp_value = 0;
d91f36db 3316 u32 ncrc;
77fdaa12 3317 u8 *bssid;
8d61ffa5 3318 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
77fdaa12 3319
8d61ffa5 3320 sdata_assert_lock(sdata);
f0706e82 3321
ae6a44e3
EK		 3322 /* Process beacon from the current BSS */
3323 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
3324 if (baselen > len)
8d61ffa5 3325 return;
ae6a44e3 3326
55de908a
JB		 3327 rcu_read_lock();
3328 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3329 if (!chanctx_conf) {
3330 rcu_read_unlock();
8d61ffa5 3331 return;
55de908a
JB		 3332 }
3333
4bf88530 3334 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
55de908a 3335 rcu_read_unlock();
8d61ffa5 3336 return;
55de908a 3337 }
4bf88530 3338 chan = chanctx_conf->def.chan;
55de908a 3339 rcu_read_unlock();
f0706e82 3340
c65dd147 3341 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
b203ca39 3342 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
66e67e41 3343 ieee802_11_parse_elems(mgmt->u.beacon.variable,
b2e506bf 3344 len - baselen, false, &elems);
77fdaa12 3345
d45c4172 3346 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
482a9c74
AB		 3347 if (elems.tim && !elems.parse_error) {
3348 const struct ieee80211_tim_ie *tim_ie = elems.tim;
3349 ifmgd->dtim_period = tim_ie->dtim_period;
3350 }
989c6505 3351 ifmgd->have_beacon = true;
c65dd147 3352 ifmgd->assoc_data->need_beacon = false;
30686bf7 3353 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
ef429dad
JB		 3354 sdata->vif.bss_conf.sync_tsf =
3355 le64_to_cpu(mgmt->u.beacon.timestamp);
3356 sdata->vif.bss_conf.sync_device_ts =
3357 rx_status->device_timestamp;
3358 if (elems.tim)
3359 sdata->vif.bss_conf.sync_dtim_count =
3360 elems.tim->dtim_count;
3361 else
3362 sdata->vif.bss_conf.sync_dtim_count = 0;
3363 }
66e67e41
JB		 3364 /* continue assoc process */
3365 ifmgd->assoc_data->timeout = jiffies;
89afe614 3366 ifmgd->assoc_data->timeout_started = true;
8d61ffa5
JB		 3367 run_again(sdata, ifmgd->assoc_data->timeout);
3368 return;
66e67e41 3369 }
77fdaa12 3370
66e67e41 3371 if (!ifmgd->associated ||
b203ca39 3372 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
8d61ffa5 3373 return;
66e67e41 3374 bssid = ifmgd->associated->bssid;
f0706e82 3375
17e4ec14
JM		 3376 /* Track average RSSI from the Beacon frames of the current AP */
3377 ifmgd->last_beacon_signal = rx_status->signal;
3378 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
3379 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
3ba06c6f 3380 ifmgd->ave_beacon_signal = rx_status->signal * 16;
17e4ec14 3381 ifmgd->last_cqm_event_signal = 0;
391a200a 3382 ifmgd->count_beacon_signal = 1;
615f7b9b 3383 ifmgd->last_ave_beacon_signal = 0;
17e4ec14
JM		 3384 } else {
3385 ifmgd->ave_beacon_signal =
3386 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
3387 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
3388 ifmgd->ave_beacon_signal) / 16;
391a200a 3389 ifmgd->count_beacon_signal++;
17e4ec14 3390 }
615f7b9b
MV		 3391
3392 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
3393 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
3394 int sig = ifmgd->ave_beacon_signal;
3395 int last_sig = ifmgd->last_ave_beacon_signal;
a8182929
EG		 3396 struct ieee80211_event event = {
3397 .type = RSSI_EVENT,
3398 };
615f7b9b
MV		 3399
3400 /*
3401 * if signal crosses either of the boundaries, invoke callback
3402 * with appropriate parameters
3403 */
3404 if (sig > ifmgd->rssi_max_thold &&
3405 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
3406 ifmgd->last_ave_beacon_signal = sig;
a8182929
EG		 3407 event.u.rssi.data = RSSI_EVENT_HIGH;
3408 drv_event_callback(local, sdata, &event);
615f7b9b
MV		 3409 } else if (sig < ifmgd->rssi_min_thold &&
3410 (last_sig >= ifmgd->rssi_max_thold ||
3411 last_sig == 0)) {
3412 ifmgd->last_ave_beacon_signal = sig;
a8182929
EG		 3413 event.u.rssi.data = RSSI_EVENT_LOW;
3414 drv_event_callback(local, sdata, &event);
615f7b9b
MV		 3415 }
3416 }
3417
17e4ec14 3418 if (bss_conf->cqm_rssi_thold &&
391a200a 3419 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
ea086359 3420 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
17e4ec14
JM		 3421 int sig = ifmgd->ave_beacon_signal / 16;
3422 int last_event = ifmgd->last_cqm_event_signal;
3423 int thold = bss_conf->cqm_rssi_thold;
3424 int hyst = bss_conf->cqm_rssi_hyst;
3425 if (sig < thold &&
3426 (last_event == 0 || sig < last_event - hyst)) {
3427 ifmgd->last_cqm_event_signal = sig;
3428 ieee80211_cqm_rssi_notify(
3429 &sdata->vif,
3430 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3431 GFP_KERNEL);
3432 } else if (sig > thold &&
3433 (last_event == 0 || sig > last_event + hyst)) {
3434 ifmgd->last_cqm_event_signal = sig;
3435 ieee80211_cqm_rssi_notify(
3436 &sdata->vif,
3437 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3438 GFP_KERNEL);
3439 }
3440 }
3441
392b9ffb 3442 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
bdcbd8e0 3443 mlme_dbg_ratelimited(sdata,
112c31f0 3444 "cancelling AP probe due to a received beacon\n");
392b9ffb 3445 ieee80211_reset_ap_probe(sdata);
92778180
JM		 3446 }
3447
b291ba11
JB		 3448 /*
3449 * Push the beacon loss detection into the future since
3450 * we are processing a beacon from the AP just now.
3451 */
d3a910a8 3452 ieee80211_sta_reset_beacon_monitor(sdata);
b291ba11 3453
d91f36db
JB		 3454 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3455 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
b2e506bf 3456 len - baselen, false, &elems,
d91f36db
JB		 3457 care_about_ies, ncrc);
3458
30686bf7 3459 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) {
f87ad637
RR		 3460 bool directed_tim = ieee80211_check_tim(elems.tim,
3461 elems.tim_len,
3462 ifmgd->aid);
1fb3606b 3463 if (directed_tim) {
572e0012 3464 if (local->hw.conf.dynamic_ps_timeout > 0) {
70b12f26
RW		 3465 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3466 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3467 ieee80211_hw_config(local,
3468 IEEE80211_CONF_CHANGE_PS);
3469 }
572e0012 3470 ieee80211_send_nullfunc(local, sdata, 0);
6f0756a3 3471 } else if (!local->pspolling && sdata->u.mgd.powersave) {
572e0012
KV		 3472 local->pspolling = true;
3473
3474 /*
3475 * Here is assumed that the driver will be
3476 * able to send ps-poll frame and receive a
3477 * response even though power save mode is
3478 * enabled, but some drivers might require
3479 * to disable power save here. This needs
3480 * to be investigated.
3481 */
3482 ieee80211_send_pspoll(local, sdata);
3483 }
a97b77b9
VN		 3484 }
3485 }
7a5158ef 3486
488dd7b5 3487 if (sdata->vif.p2p) {
67baf663 3488 struct ieee80211_p2p_noa_attr noa = {};
488dd7b5
JB		 3489 int ret;
3490
3491 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3492 len - baselen,
3493 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
934457ee 3494 (u8 *) &noa, sizeof(noa));
67baf663
JD		 3495 if (ret >= 2) {
3496 if (sdata->u.mgd.p2p_noa_index != noa.index) {
3497 /* valid noa_attr and index changed */
3498 sdata->u.mgd.p2p_noa_index = noa.index;
3499 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3500 changed |= BSS_CHANGED_P2P_PS;
3501 /*
3502 * make sure we update all information, the CRC
3503 * mechanism doesn't look at P2P attributes.
3504 */
3505 ifmgd->beacon_crc_valid = false;
3506 }
3507 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3508 /* noa_attr not found and we had valid noa_attr before */
3509 sdata->u.mgd.p2p_noa_index = -1;
3510 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
488dd7b5 3511 changed |= BSS_CHANGED_P2P_PS;
488dd7b5
JB		 3512 ifmgd->beacon_crc_valid = false;
3513 }
3514 }
3515
0c21e632
LC		 3516 if (ifmgd->csa_waiting_bcn)
3517 ieee80211_chswitch_post_beacon(sdata);
3518
2ecc3905
AB		 3519 /*
3520 * Update beacon timing and dtim count on every beacon appearance. This
3521 * will allow the driver to use the most updated values. Do it before
3522 * comparing this one with last received beacon.
3523 * IMPORTANT: These parameters would possibly be out of sync by the time
3524 * the driver will use them. The synchronized view is currently
3525 * guaranteed only in certain callbacks.
3526 */
30686bf7 3527 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
2ecc3905
AB		 3528 sdata->vif.bss_conf.sync_tsf =
3529 le64_to_cpu(mgmt->u.beacon.timestamp);
3530 sdata->vif.bss_conf.sync_device_ts =
3531 rx_status->device_timestamp;
3532 if (elems.tim)
3533 sdata->vif.bss_conf.sync_dtim_count =
3534 elems.tim->dtim_count;
3535 else
3536 sdata->vif.bss_conf.sync_dtim_count = 0;
3537 }
3538
d8ec4433 3539 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
8d61ffa5 3540 return;
30196673 3541 ifmgd->beacon_crc = ncrc;
d8ec4433 3542 ifmgd->beacon_crc_valid = true;
30196673 3543
d45c4172 3544 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
7d25745d 3545
d70b7616 3546 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
2ba45384 3547 rx_status->device_timestamp,
d70b7616
JB		 3548 &elems, true);
3549
095d81ce
JB		 3550 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
3551 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
7d25745d
JB		 3552 elems.wmm_param_len))
3553 changed |= BSS_CHANGED_QOS;
3554
c65dd147
EG		 3555 /*
3556 * If we haven't had a beacon before, tell the driver about the
ef429dad 3557 * DTIM period (and beacon timing if desired) now.
c65dd147 3558 */
989c6505 3559 if (!ifmgd->have_beacon) {
c65dd147
EG		 3560 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3561 if (elems.tim)
3562 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3563 else
3564 bss_conf->dtim_period = 1;
ef429dad 3565
989c6505
AB		 3566 changed |= BSS_CHANGED_BEACON_INFO;
3567 ifmgd->have_beacon = true;
482a9c74
AB		 3568
3569 mutex_lock(&local->iflist_mtx);
3570 ieee80211_recalc_ps(local, -1);
3571 mutex_unlock(&local->iflist_mtx);
3572
ce857888 3573 ieee80211_recalc_ps_vif(sdata);
c65dd147
EG		 3574 }
3575
1946bed9 3576 if (elems.erp_info) {
7a5158ef
JB		 3577 erp_valid = true;
3578 erp_value = elems.erp_info[0];
3579 } else {
3580 erp_valid = false;
50c4afb9 3581 }
7a5158ef
JB		 3582 changed |= ieee80211_handle_bss_capability(sdata,
3583 le16_to_cpu(mgmt->u.beacon.capab_info),
3584 erp_valid, erp_value);
f0706e82 3585
1128958d 3586 mutex_lock(&local->sta_mtx);
bee7f586
JB		 3587 sta = sta_info_get(sdata, bssid);
3588
53b954ee
EP		 3589 if (ieee80211_config_bw(sdata, sta,
3590 elems.ht_cap_elem, elems.ht_operation,
30eb1dc2
JB		 3591 elems.vht_operation, bssid, &changed)) {
3592 mutex_unlock(&local->sta_mtx);
3593 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3594 WLAN_REASON_DEAUTH_LEAVING,
3595 true, deauth_buf);
a90faa9d
EG		 3596 ieee80211_report_disconnect(sdata, deauth_buf,
3597 sizeof(deauth_buf), true,
3598 WLAN_REASON_DEAUTH_LEAVING);
8d61ffa5 3599 return;
30eb1dc2 3600 }
bee7f586
JB		 3601
3602 if (sta && elems.opmode_notif)
3603 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3604 rx_status->band, true);
1128958d 3605 mutex_unlock(&local->sta_mtx);
d3c990fb 3606
24a4e400
SG		 3607 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
3608 elems.country_elem,
3609 elems.country_elem_len,
c8d65917
SG		 3610 elems.pwr_constr_elem,
3611 elems.cisco_dtpc_elem);
3f2355cb 3612
471b3efd 3613 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 3614}
3615
1fa57d01
JB		 3616void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3617 struct sk_buff *skb)
f0706e82
JB		 3618{
3619 struct ieee80211_rx_status *rx_status;
f0706e82
JB		 3620 struct ieee80211_mgmt *mgmt;
3621 u16 fc;
1b3a2e49
JB		 3622 struct ieee802_11_elems elems;
3623 int ies_len;
f0706e82 3624
f0706e82
JB		 3625 rx_status = (struct ieee80211_rx_status *) skb->cb;
3626 mgmt = (struct ieee80211_mgmt *) skb->data;
3627 fc = le16_to_cpu(mgmt->frame_control);
3628
8d61ffa5 3629 sdata_lock(sdata);
77fdaa12 3630
66e67e41
JB		 3631 switch (fc & IEEE80211_FCTL_STYPE) {
3632 case IEEE80211_STYPE_BEACON:
8d61ffa5 3633 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
66e67e41
JB		 3634 break;
3635 case IEEE80211_STYPE_PROBE_RESP:
3636 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3637 break;
3638 case IEEE80211_STYPE_AUTH:
8d61ffa5 3639 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
66e67e41
JB		 3640 break;
3641 case IEEE80211_STYPE_DEAUTH:
8d61ffa5 3642 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
66e67e41
JB		 3643 break;
3644 case IEEE80211_STYPE_DISASSOC:
8d61ffa5 3645 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
66e67e41
JB		 3646 break;
3647 case IEEE80211_STYPE_ASSOC_RESP:
3648 case IEEE80211_STYPE_REASSOC_RESP:
8d61ffa5 3649 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
66e67e41
JB		 3650 break;
3651 case IEEE80211_STYPE_ACTION:
37799e52 3652 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
1b3a2e49
JB		 3653 ies_len = skb->len -
3654 offsetof(struct ieee80211_mgmt,
3655 u.action.u.chan_switch.variable);
37799e52
JB		 3656
3657 if (ies_len < 0)
3658 break;
3659
3660 ieee802_11_parse_elems(
3661 mgmt->u.action.u.chan_switch.variable,
b2e506bf 3662 ies_len, true, &elems);
37799e52
JB		 3663
3664 if (elems.parse_error)
3665 break;
3666
1b3a2e49 3667 ieee80211_sta_process_chanswitch(sdata,
2ba45384
LC		 3668 rx_status->mactime,
3669 rx_status->device_timestamp,
3670 &elems, false);
1b3a2e49
JB		 3671 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3672 ies_len = skb->len -
3673 offsetof(struct ieee80211_mgmt,
3674 u.action.u.ext_chan_switch.variable);
3675
3676 if (ies_len < 0)
3677 break;
3678
3679 ieee802_11_parse_elems(
3680 mgmt->u.action.u.ext_chan_switch.variable,
b2e506bf 3681 ies_len, true, &elems);
1b3a2e49
JB		 3682
3683 if (elems.parse_error)
3684 break;
3685
3686 /* for the handling code pretend this was also an IE */
3687 elems.ext_chansw_ie =
3688 &mgmt->u.action.u.ext_chan_switch.data;
3689
66e67e41 3690 ieee80211_sta_process_chanswitch(sdata,
2ba45384
LC		 3691 rx_status->mactime,
3692 rx_status->device_timestamp,
3693 &elems, false);
77fdaa12 3694 }
37799e52 3695 break;
77fdaa12 3696 }
8d61ffa5 3697 sdata_unlock(sdata);
f0706e82
JB		 3698}
3699
9c6bd790 3700static void ieee80211_sta_timer(unsigned long data)
f0706e82 3701{
60f8b39c
JB		 3702 struct ieee80211_sub_if_data *sdata =
3703 (struct ieee80211_sub_if_data *) data;
5bb644a0 3704
9b7d72c1 3705 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
f0706e82
JB		 3706}
3707
04ac3c0e 3708static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
6b684db1 3709 u8 *bssid, u8 reason, bool tx)
04ac3c0e 3710{
6ae16775 3711 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
04ac3c0e 3712
37ad3888 3713 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
6b684db1 3714 tx, frame_buf);
37ad3888 3715
a90faa9d
EG		 3716 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
3717 reason);
04ac3c0e
FF		 3718}
3719
66e67e41
JB		 3720static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
3721{
3722 struct ieee80211_local *local = sdata->local;
3723 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3724 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
1672c0e3 3725 u32 tx_flags = 0;
66e67e41 3726
8d61ffa5 3727 sdata_assert_lock(sdata);
66e67e41
JB		 3728
3729 if (WARN_ON_ONCE(!auth_data))
3730 return -EINVAL;
3731
66e67e41
JB		 3732 auth_data->tries++;
3733
3734 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
bdcbd8e0
JB		 3735 sdata_info(sdata, "authentication with %pM timed out\n",
3736 auth_data->bss->bssid);
66e67e41
JB		 3737
3738 /*
3739 * Most likely AP is not in the range so remove the
3740 * bss struct for that AP.
3741 */
3742 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3743
3744 return -ETIMEDOUT;
3745 }
3746
a1845fc7
JB		 3747 drv_mgd_prepare_tx(local, sdata);
3748
66e67e41 3749 if (auth_data->bss->proberesp_ies) {
6b8ece3a
JM		 3750 u16 trans = 1;
3751 u16 status = 0;
3752
bdcbd8e0
JB		 3753 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3754 auth_data->bss->bssid, auth_data->tries,
3755 IEEE80211_AUTH_MAX_TRIES);
66e67e41
JB		 3756
3757 auth_data->expected_transaction = 2;
6b8ece3a
JM		 3758
3759 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3760 trans = auth_data->sae_trans;
3761 status = auth_data->sae_status;
3762 auth_data->expected_transaction = trans;
3763 }
3764
30686bf7 3765 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
6211dd12
SG		 3766 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3767 IEEE80211_TX_INTFL_MLME_CONN_TX;
3768
6b8ece3a
JM		 3769 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3770 auth_data->data, auth_data->data_len,
66e67e41 3771 auth_data->bss->bssid,
1672c0e3
JB		 3772 auth_data->bss->bssid, NULL, 0, 0,
3773 tx_flags);
66e67e41
JB		 3774 } else {
3775 const u8 *ssidie;
3776
bdcbd8e0
JB		 3777 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
3778 auth_data->bss->bssid, auth_data->tries,
3779 IEEE80211_AUTH_MAX_TRIES);
66e67e41 3780
9caf0364 3781 rcu_read_lock();
66e67e41 3782 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
9caf0364
JB		 3783 if (!ssidie) {
3784 rcu_read_unlock();
66e67e41 3785 return -EINVAL;
9caf0364 3786 }
66e67e41
JB		 3787 /*
3788 * Direct probe is sent to broadcast address as some APs
3789 * will not answer to direct packet in unassociated state.
3790 */
a344d677
JB		 3791 ieee80211_send_probe_req(sdata, sdata->vif.addr, NULL,
3792 ssidie + 2, ssidie[1],
6211dd12 3793 NULL, 0, (u32) -1, true, 0,
55de908a 3794 auth_data->bss->channel, false);
9caf0364 3795 rcu_read_unlock();
66e67e41
JB		 3796 }
3797
6211dd12 3798 if (tx_flags == 0) {
1672c0e3 3799 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
cb236d2d 3800 auth_data->timeout_started = true;
8d61ffa5 3801 run_again(sdata, auth_data->timeout);
89afe614 3802 } else {
cb236d2d
JB		 3803 auth_data->timeout =
3804 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
3805 auth_data->timeout_started = true;
3806 run_again(sdata, auth_data->timeout);
1672c0e3 3807 }
66e67e41
JB		 3808
3809 return 0;
3810}
3811
3812static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3813{
3814 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3815 struct ieee80211_local *local = sdata->local;
3816
8d61ffa5 3817 sdata_assert_lock(sdata);
66e67e41 3818
66e67e41
JB		 3819 assoc_data->tries++;
3820 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
bdcbd8e0
JB		 3821 sdata_info(sdata, "association with %pM timed out\n",
3822 assoc_data->bss->bssid);
66e67e41
JB		 3823
3824 /*
3825 * Most likely AP is not in the range so remove the
3826 * bss struct for that AP.
3827 */
3828 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3829
3830 return -ETIMEDOUT;
3831 }
3832
bdcbd8e0
JB		 3833 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3834 assoc_data->bss->bssid, assoc_data->tries,
3835 IEEE80211_ASSOC_MAX_TRIES);
66e67e41
JB		 3836 ieee80211_send_assoc(sdata);
3837
30686bf7 3838 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
1672c0e3 3839 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
89afe614 3840 assoc_data->timeout_started = true;
8d61ffa5 3841 run_again(sdata, assoc_data->timeout);
89afe614 3842 } else {
cb236d2d
JB		 3843 assoc_data->timeout =
3844 round_jiffies_up(jiffies +
3845 IEEE80211_ASSOC_TIMEOUT_LONG);
3846 assoc_data->timeout_started = true;
3847 run_again(sdata, assoc_data->timeout);
1672c0e3 3848 }
66e67e41
JB		 3849
3850 return 0;
3851}
3852
1672c0e3
JB		 3853void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3854 __le16 fc, bool acked)
3855{
3856 struct ieee80211_local *local = sdata->local;
3857
3858 sdata->u.mgd.status_fc = fc;
3859 sdata->u.mgd.status_acked = acked;
3860 sdata->u.mgd.status_received = true;
3861
3862 ieee80211_queue_work(&local->hw, &sdata->work);
3863}
3864
1fa57d01 3865void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
9c6bd790 3866{
9c6bd790 3867 struct ieee80211_local *local = sdata->local;
1fa57d01 3868 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
9c6bd790 3869
8d61ffa5 3870 sdata_lock(sdata);
77fdaa12 3871
1672c0e3
JB		 3872 if (ifmgd->status_received) {
3873 __le16 fc = ifmgd->status_fc;
3874 bool status_acked = ifmgd->status_acked;
3875
3876 ifmgd->status_received = false;
3877 if (ifmgd->auth_data &&
3878 (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) {
3879 if (status_acked) {
3880 ifmgd->auth_data->timeout =
3881 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
8d61ffa5 3882 run_again(sdata, ifmgd->auth_data->timeout);
1672c0e3
JB		 3883 } else {
3884 ifmgd->auth_data->timeout = jiffies - 1;
3885 }
89afe614 3886 ifmgd->auth_data->timeout_started = true;
1672c0e3
JB		 3887 } else if (ifmgd->assoc_data &&
3888 (ieee80211_is_assoc_req(fc) ||
3889 ieee80211_is_reassoc_req(fc))) {
3890 if (status_acked) {
3891 ifmgd->assoc_data->timeout =
3892 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
8d61ffa5 3893 run_again(sdata, ifmgd->assoc_data->timeout);
1672c0e3
JB		 3894 } else {
3895 ifmgd->assoc_data->timeout = jiffies - 1;
3896 }
89afe614 3897 ifmgd->assoc_data->timeout_started = true;
1672c0e3
JB		 3898 }
3899 }
3900
89afe614 3901 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
66e67e41
JB		 3902 time_after(jiffies, ifmgd->auth_data->timeout)) {
3903 if (ifmgd->auth_data->done) {
3904 /*
3905 * ok ... we waited for assoc but userspace didn't,
3906 * so let's just kill the auth data
3907 */
3908 ieee80211_destroy_auth_data(sdata, false);
3909 } else if (ieee80211_probe_auth(sdata)) {
3910 u8 bssid[ETH_ALEN];
a9409093
EG		 3911 struct ieee80211_event event = {
3912 .type = MLME_EVENT,
3913 .u.mlme.data = AUTH_EVENT,
3914 .u.mlme.status = MLME_TIMEOUT,
3915 };
66e67e41
JB		 3916
3917 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3918
3919 ieee80211_destroy_auth_data(sdata, false);
3920
6ff57cf8 3921 cfg80211_auth_timeout(sdata->dev, bssid);
a9409093 3922 drv_event_callback(sdata->local, sdata, &event);
66e67e41 3923 }
89afe614 3924 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
8d61ffa5 3925 run_again(sdata, ifmgd->auth_data->timeout);
66e67e41 3926
89afe614 3927 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
66e67e41 3928 time_after(jiffies, ifmgd->assoc_data->timeout)) {
989c6505 3929 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
66e67e41 3930 ieee80211_do_assoc(sdata)) {
959867fa 3931 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
d0d1a12f
EG		 3932 struct ieee80211_event event = {
3933 .type = MLME_EVENT,
3934 .u.mlme.data = ASSOC_EVENT,
3935 .u.mlme.status = MLME_TIMEOUT,
3936 };
66e67e41
JB		 3937
3938 ieee80211_destroy_assoc_data(sdata, false);
959867fa 3939 cfg80211_assoc_timeout(sdata->dev, bss);
d0d1a12f 3940 drv_event_callback(sdata->local, sdata, &event);
66e67e41 3941 }
89afe614 3942 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
8d61ffa5 3943 run_again(sdata, ifmgd->assoc_data->timeout);
66e67e41 3944
392b9ffb 3945 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
b291ba11 3946 ifmgd->associated) {
a43abf29 3947 u8 bssid[ETH_ALEN];
72a8a3ed 3948 int max_tries;
a43abf29 3949
0c1ad2ca 3950 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4e5ff376 3951
30686bf7 3952 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
180205bd 3953 max_tries = max_nullfunc_tries;
72a8a3ed 3954 else
180205bd 3955 max_tries = max_probe_tries;
72a8a3ed 3956
4e5ff376
FF		 3957 /* ACK received for nullfunc probing frame */
3958 if (!ifmgd->probe_send_count)
3959 ieee80211_reset_ap_probe(sdata);
04ac3c0e
FF		 3960 else if (ifmgd->nullfunc_failed) {
3961 if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3962 mlme_dbg(sdata,
3963 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3964 bssid, ifmgd->probe_send_count,
3965 max_tries);
04ac3c0e
FF		 3966 ieee80211_mgd_probe_ap_send(sdata);
3967 } else {
bdcbd8e0
JB		 3968 mlme_dbg(sdata,
3969 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3970 bssid);
95acac61 3971 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1
JB		 3972 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3973 false);
04ac3c0e
FF		 3974 }
3975 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
8d61ffa5 3976 run_again(sdata, ifmgd->probe_timeout);
30686bf7 3977 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
bdcbd8e0
JB		 3978 mlme_dbg(sdata,
3979 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3980 bssid, probe_wait_ms);
95acac61 3981 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 3982 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
04ac3c0e 3983 } else if (ifmgd->probe_send_count < max_tries) {
bdcbd8e0
JB		 3984 mlme_dbg(sdata,
3985 "No probe response from AP %pM after %dms, try %d/%i\n",
3986 bssid, probe_wait_ms,
3987 ifmgd->probe_send_count, max_tries);
a43abf29
ML		 3988 ieee80211_mgd_probe_ap_send(sdata);
3989 } else {
b291ba11
JB		 3990 /*
3991 * We actually lost the connection ... or did we?
3992 * Let's make sure!
3993 */
b38afa87
BG		 3994 wiphy_debug(local->hw.wiphy,
3995 "%s: No probe response from AP %pM"
3996 " after %dms, disconnecting.\n",
3997 sdata->name,
180205bd 3998 bssid, probe_wait_ms);
04ac3c0e 3999
95acac61 4000 ieee80211_sta_connection_lost(sdata, bssid,
6b684db1 4001 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
b291ba11
JB		 4002 }
4003 }
4004
8d61ffa5 4005 sdata_unlock(sdata);
f0706e82
JB		 4006}
4007
b291ba11
JB		 4008static void ieee80211_sta_bcn_mon_timer(unsigned long data)
4009{
4010 struct ieee80211_sub_if_data *sdata =
4011 (struct ieee80211_sub_if_data *) data;
0c21e632 4012 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
b291ba11 4013
0c21e632 4014 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
e5593f56
MK		 4015 return;
4016
682bd38b 4017 sdata->u.mgd.connection_loss = false;
1e4dcd01
JO		 4018 ieee80211_queue_work(&sdata->local->hw,
4019 &sdata->u.mgd.beacon_connection_loss_work);
b291ba11
JB		 4020}
4021
4022static void ieee80211_sta_conn_mon_timer(unsigned long data)
4023{
4024 struct ieee80211_sub_if_data *sdata =
4025 (struct ieee80211_sub_if_data *) data;
4026 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4027 struct ieee80211_local *local = sdata->local;
4028
0c21e632 4029 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
e5593f56
MK		 4030 return;
4031
42935eca 4032 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
b291ba11
JB		 4033}
4034
4035static void ieee80211_sta_monitor_work(struct work_struct *work)
4036{
4037 struct ieee80211_sub_if_data *sdata =
4038 container_of(work, struct ieee80211_sub_if_data,
4039 u.mgd.monitor_work);
4040
4041 ieee80211_mgd_probe_ap(sdata, false);
4042}
4043
9c6bd790
JB		 4044static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
4045{
ad935687 4046 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
925e64c3 4047 __ieee80211_stop_poll(sdata);
ad935687 4048
b291ba11 4049 /* let's probe the connection once */
30686bf7 4050 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
494f1fe5
EP		 4051 ieee80211_queue_work(&sdata->local->hw,
4052 &sdata->u.mgd.monitor_work);
b291ba11 4053 /* and do all the other regular work too */
64592c8f 4054 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
ad935687 4055 }
9c6bd790 4056}
f0706e82 4057
b8360ab8 4058#ifdef CONFIG_PM
1a1cb744
JB		 4059void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
4060{
4061 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4062 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4063
4064 sdata_lock(sdata);
4065
c52666ae
EG		 4066 if (ifmgd->auth_data || ifmgd->assoc_data) {
4067 const u8 *bssid = ifmgd->auth_data ?
4068 ifmgd->auth_data->bss->bssid :
4069 ifmgd->assoc_data->bss->bssid;
4070
1a1cb744 4071 /*
c52666ae
EG		 4072 * If we are trying to authenticate / associate while suspending,
4073 * cfg80211 won't know and won't actually abort those attempts,
4074 * thus we need to do that ourselves.
1a1cb744 4075 */
c52666ae 4076 ieee80211_send_deauth_disassoc(sdata, bssid,
1a1cb744
JB		 4077 IEEE80211_STYPE_DEAUTH,
4078 WLAN_REASON_DEAUTH_LEAVING,
4079 false, frame_buf);
c52666ae
EG		 4080 if (ifmgd->assoc_data)
4081 ieee80211_destroy_assoc_data(sdata, false);
4082 if (ifmgd->auth_data)
4083 ieee80211_destroy_auth_data(sdata, false);
1a1cb744
JB		 4084 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
4085 IEEE80211_DEAUTH_FRAME_LEN);
4086 }
4087
be72afe0
JB		 4088 /* This is a bit of a hack - we should find a better and more generic
4089 * solution to this. Normally when suspending, cfg80211 will in fact
4090 * deauthenticate. However, it doesn't (and cannot) stop an ongoing
4091 * auth (not so important) or assoc (this is the problem) process.
4092 *
4093 * As a consequence, it can happen that we are in the process of both
4094 * associating and suspending, and receive an association response
4095 * after cfg80211 has checked if it needs to disconnect, but before
4096 * we actually set the flag to drop incoming frames. This will then
4097 * cause the workqueue flush to process the association response in
4098 * the suspend, resulting in a successful association just before it
4099 * tries to remove the interface from the driver, which now though
4100 * has a channel context assigned ... this results in issues.
4101 *
4102 * To work around this (for now) simply deauth here again if we're
4103 * now connected.
4104 */
4105 if (ifmgd->associated && !sdata->local->wowlan) {
4106 u8 bssid[ETH_ALEN];
4107 struct cfg80211_deauth_request req = {
4108 .reason_code = WLAN_REASON_DEAUTH_LEAVING,
4109 .bssid = bssid,
4110 };
4111
4112 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
4113 ieee80211_mgd_deauth(sdata, &req);
4114 }
4115
1a1cb744
JB		 4116 sdata_unlock(sdata);
4117}
4118
b8360ab8
JB		 4119void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
4120{
4121 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4122
8d61ffa5 4123 sdata_lock(sdata);
b8360ab8 4124 if (!ifmgd->associated) {
8d61ffa5 4125 sdata_unlock(sdata);
b8360ab8
JB		 4126 return;
4127 }
4128
4129 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
4130 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
4131 mlme_dbg(sdata, "driver requested disconnect after resume\n");
4132 ieee80211_sta_connection_lost(sdata,
4133 ifmgd->associated->bssid,
4134 WLAN_REASON_UNSPECIFIED,
4135 true);
8d61ffa5 4136 sdata_unlock(sdata);
b8360ab8
JB		 4137 return;
4138 }
8d61ffa5 4139 sdata_unlock(sdata);
b8360ab8
JB		 4140}
4141#endif
4142
9c6bd790
JB		 4143/* interface setup */
4144void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 4145{
46900298 4146 struct ieee80211_if_managed *ifmgd;
988c0f72 4147
46900298 4148 ifmgd = &sdata->u.mgd;
b291ba11 4149 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
46900298 4150 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
1e4dcd01
JO		 4151 INIT_WORK(&ifmgd->beacon_connection_loss_work,
4152 ieee80211_beacon_connection_loss_work);
882a7c69
JB		 4153 INIT_WORK(&ifmgd->csa_connection_drop_work,
4154 ieee80211_csa_connection_drop_work);
687da132 4155 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
81dd2b88
AN		 4156 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
4157 ieee80211_tdls_peer_del_work);
46900298 4158 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
c481ec97 4159 (unsigned long) sdata);
b291ba11
JB		 4160 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
4161 (unsigned long) sdata);
4162 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
4163 (unsigned long) sdata);
46900298 4164 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
9c6bd790 4165 (unsigned long) sdata);
02219b3a
JB		 4166 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
4167 ieee80211_sta_handle_tspec_ac_params_wk);
9c6bd790 4168
ab1faead 4169 ifmgd->flags = 0;
1478acb3 4170 ifmgd->powersave = sdata->wdev.ps;
219c3867
AB		 4171 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
4172 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
67baf663 4173 ifmgd->p2p_noa_index = -1;
bbbdff9e 4174
0d8614b4 4175 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
0f78231b
JB		 4176 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
4177 else
4178 ifmgd->req_smps = IEEE80211_SMPS_OFF;
1277b4a9
LK		 4179
4180 /* Setup TDLS data */
4181 spin_lock_init(&ifmgd->teardown_lock);
4182 ifmgd->teardown_skb = NULL;
4183 ifmgd->orig_teardown_skb = NULL;
f0706e82
JB		 4184}
4185
77fdaa12
JB		 4186/* scan finished notification */
4187void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
60f8b39c 4188{
31ee67a1 4189 struct ieee80211_sub_if_data *sdata;
60f8b39c 4190
77fdaa12
JB		 4191 /* Restart STA timers */
4192 rcu_read_lock();
370bd005
BG		 4193 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4194 if (ieee80211_sdata_running(sdata))
4195 ieee80211_restart_sta_timer(sdata);
4196 }
77fdaa12
JB		 4197 rcu_read_unlock();
4198}
60f8b39c 4199
77fdaa12
JB		 4200int ieee80211_max_network_latency(struct notifier_block *nb,
4201 unsigned long data, void *dummy)
4202{
4203 s32 latency_usec = (s32) data;
4204 struct ieee80211_local *local =
4205 container_of(nb, struct ieee80211_local,
4206 network_latency_notifier);
1fa6f4af 4207
77fdaa12
JB		 4208 mutex_lock(&local->iflist_mtx);
4209 ieee80211_recalc_ps(local, latency_usec);
4210 mutex_unlock(&local->iflist_mtx);
dfe67012 4211
8bd811aa 4212 return NOTIFY_OK;
9c6bd790
JB		 4213}
4214
f2d9d270
JB		 4215static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
4216 struct cfg80211_bss *cbss)
4217{
4218 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4219 const u8 *ht_cap_ie, *vht_cap_ie;
4220 const struct ieee80211_ht_cap *ht_cap;
4221 const struct ieee80211_vht_cap *vht_cap;
4222 u8 chains = 1;
4223
4224 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
4225 return chains;
4226
9caf0364 4227 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
f2d9d270
JB		 4228 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
4229 ht_cap = (void *)(ht_cap_ie + 2);
4230 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
4231 /*
4232 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
4233 * "Tx Unequal Modulation Supported" fields.
4234 */
4235 }
4236
4237 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
4238 return chains;
4239
9caf0364 4240 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
f2d9d270
JB		 4241 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
4242 u8 nss;
4243 u16 tx_mcs_map;
4244
4245 vht_cap = (void *)(vht_cap_ie + 2);
4246 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
4247 for (nss = 8; nss > 0; nss--) {
4248 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
4249 IEEE80211_VHT_MCS_NOT_SUPPORTED)
4250 break;
4251 }
4252 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
4253 chains = max(chains, nss);
4254 }
4255
4256 return chains;
4257}
4258
b17166a7
JB		 4259static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
4260 struct cfg80211_bss *cbss)
a1cf775d
JB		 4261{
4262 struct ieee80211_local *local = sdata->local;
4263 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
53b954ee 4264 const struct ieee80211_ht_cap *ht_cap = NULL;
24398e39 4265 const struct ieee80211_ht_operation *ht_oper = NULL;
f2d9d270 4266 const struct ieee80211_vht_operation *vht_oper = NULL;
24398e39 4267 struct ieee80211_supported_band *sband;
4bf88530 4268 struct cfg80211_chan_def chandef;
f2d9d270 4269 int ret;
a1cf775d 4270
24398e39
JB		 4271 sband = local->hw.wiphy->bands[cbss->channel->band];
4272
f2d9d270
JB		 4273 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
4274 IEEE80211_STA_DISABLE_80P80MHZ |
4275 IEEE80211_STA_DISABLE_160MHZ);
4276
9caf0364
JB		 4277 rcu_read_lock();
4278
f2d9d270
JB		 4279 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
4280 sband->ht_cap.ht_supported) {
53b954ee 4281 const u8 *ht_oper_ie, *ht_cap_ie;
24398e39 4282
9caf0364 4283 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
24398e39
JB		 4284 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
4285 ht_oper = (void *)(ht_oper_ie + 2);
08e6effa 4286
53b954ee
EP		 4287 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
4288 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
4289 ht_cap = (void *)(ht_cap_ie + 2);
4290
4291 if (!ht_cap) {
08e6effa
JB		 4292 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4293 ht_oper = NULL;
4294 }
24398e39
JB		 4295 }
4296
f2d9d270
JB		 4297 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4298 sband->vht_cap.vht_supported) {
08e6effa 4299 const u8 *vht_oper_ie, *vht_cap;
f2d9d270 4300
9caf0364
JB		 4301 vht_oper_ie = ieee80211_bss_get_ie(cbss,
4302 WLAN_EID_VHT_OPERATION);
f2d9d270
JB		 4303 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
4304 vht_oper = (void *)(vht_oper_ie + 2);
4305 if (vht_oper && !ht_oper) {
4306 vht_oper = NULL;
bdcbd8e0 4307 sdata_info(sdata,
f2d9d270 4308 "AP advertised VHT without HT, disabling both\n");
cb145022
JB		 4309 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4310 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
24398e39 4311 }
08e6effa
JB		 4312
4313 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
4314 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
4315 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4316 vht_oper = NULL;
4317 }
24398e39
JB		 4318 }
4319
f2d9d270
JB		 4320 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
4321 cbss->channel,
53b954ee 4322 ht_cap, ht_oper, vht_oper,
5cdaed1e 4323 &chandef, false);
04ecd257 4324
f2d9d270
JB		 4325 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
4326 local->rx_chains);
24398e39 4327
9caf0364
JB		 4328 rcu_read_unlock();
4329
04ecd257
JB		 4330 /* will change later if needed */
4331 sdata->smps_mode = IEEE80211_SMPS_OFF;
4332
34a3740d 4333 mutex_lock(&local->mtx);
f2d9d270
JB		 4334 /*
4335 * If this fails (possibly due to channel context sharing
4336 * on incompatible channels, e.g. 80+80 and 160 sharing the
4337 * same control channel) try to use a smaller bandwidth.
4338 */
4339 ret = ieee80211_vif_use_channel(sdata, &chandef,
4340 IEEE80211_CHANCTX_SHARED);
0418a445
SW		 4341
4342 /* don't downgrade for 5 and 10 MHz channels, though. */
4343 if (chandef.width == NL80211_CHAN_WIDTH_5 ||
4344 chandef.width == NL80211_CHAN_WIDTH_10)
34a3740d 4345 goto out;
0418a445 4346
d601cd8d 4347 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
e6b7cde4 4348 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
d601cd8d
JB		 4349 ret = ieee80211_vif_use_channel(sdata, &chandef,
4350 IEEE80211_CHANCTX_SHARED);
4351 }
34a3740d
JB		 4352 out:
4353 mutex_unlock(&local->mtx);
f2d9d270 4354 return ret;
b17166a7
JB		 4355}
4356
4357static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
c1041f10
CRI		 4358 struct cfg80211_bss *cbss, bool assoc,
4359 bool override)
b17166a7
JB		 4360{
4361 struct ieee80211_local *local = sdata->local;
4362 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4363 struct ieee80211_bss *bss = (void *)cbss->priv;
4364 struct sta_info *new_sta = NULL;
179b8fc7 4365 struct ieee80211_supported_band *sband;
c1041f10 4366 bool have_sta = false;
b17166a7
JB		 4367 int err;
4368
179b8fc7
CRI		 4369 sband = local->hw.wiphy->bands[cbss->channel->band];
4370
b17166a7
JB		 4371 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
4372 return -EINVAL;
4373
4374 if (assoc) {
4375 rcu_read_lock();
4376 have_sta = sta_info_get(sdata, cbss->bssid);
4377 rcu_read_unlock();
4378 }
4379
4380 if (!have_sta) {
4381 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
4382 if (!new_sta)
4383 return -ENOMEM;
4384 }
179b8fc7 4385
c1041f10 4386 if (new_sta || override) {
179b8fc7
CRI		 4387 err = ieee80211_prep_channel(sdata, cbss);
4388 if (err) {
4389 if (new_sta)
4390 sta_info_free(local, new_sta);
4391 return -EINVAL;
4392 }
4393 }
4394
13e0c8e3 4395 if (new_sta) {
5d6a1b06
JB		 4396 u32 rates = 0, basic_rates = 0;
4397 bool have_higher_than_11mbit;
4398 int min_rate = INT_MAX, min_rate_index = -1;
2103dec1 4399 struct ieee80211_chanctx_conf *chanctx_conf;
8cef2c9d 4400 const struct cfg80211_bss_ies *ies;
179b8fc7 4401 int shift = ieee80211_vif_get_shift(&sdata->vif);
2103dec1 4402 u32 rate_flags;
b17166a7 4403
2103dec1
SW		 4404 rcu_read_lock();
4405 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4406 if (WARN_ON(!chanctx_conf)) {
4407 rcu_read_unlock();
c368ddaa 4408 sta_info_free(local, new_sta);
2103dec1
SW		 4409 return -EINVAL;
4410 }
4411 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
4412 rcu_read_unlock();
5d6a1b06 4413
5d6a1b06
JB		 4414 ieee80211_get_rates(sband, bss->supp_rates,
4415 bss->supp_rates_len,
4416 &rates, &basic_rates,
4417 &have_higher_than_11mbit,
2103dec1
SW		 4418 &min_rate, &min_rate_index,
4419 shift, rate_flags);
5d6a1b06
JB		 4420
4421 /*
4422 * This used to be a workaround for basic rates missing
4423 * in the association response frame. Now that we no
4424 * longer use the basic rates from there, it probably
4425 * doesn't happen any more, but keep the workaround so
4426 * in case some *other* APs are buggy in different ways
4427 * we can connect -- with a warning.
4428 */
4429 if (!basic_rates && min_rate_index >= 0) {
bdcbd8e0
JB		 4430 sdata_info(sdata,
4431 "No basic rates, using min rate instead\n");
5d6a1b06
JB		 4432 basic_rates = BIT(min_rate_index);
4433 }
4434
13e0c8e3 4435 new_sta->sta.supp_rates[cbss->channel->band] = rates;
5d6a1b06
JB		 4436 sdata->vif.bss_conf.basic_rates = basic_rates;
4437
4438 /* cf. IEEE 802.11 9.2.12 */
55de908a 4439 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
5d6a1b06
JB		 4440 have_higher_than_11mbit)
4441 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
4442 else
4443 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
4444
4445 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
4446
8c358bcd
JB		 4447 /* set timing information */
4448 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
8cef2c9d 4449 rcu_read_lock();
ef429dad
JB		 4450 ies = rcu_dereference(cbss->beacon_ies);
4451 if (ies) {
4452 const u8 *tim_ie;
4453
4454 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4455 sdata->vif.bss_conf.sync_device_ts =
4456 bss->device_ts_beacon;
4457 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4458 ies->data, ies->len);
4459 if (tim_ie && tim_ie[1] >= 2)
4460 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
4461 else
4462 sdata->vif.bss_conf.sync_dtim_count = 0;
30686bf7
JB		 4463 } else if (!ieee80211_hw_check(&sdata->local->hw,
4464 TIMING_BEACON_ONLY)) {
ef429dad
JB		 4465 ies = rcu_dereference(cbss->proberesp_ies);
4466 /* must be non-NULL since beacon IEs were NULL */
4467 sdata->vif.bss_conf.sync_tsf = ies->tsf;
4468 sdata->vif.bss_conf.sync_device_ts =
4469 bss->device_ts_presp;
4470 sdata->vif.bss_conf.sync_dtim_count = 0;
4471 } else {
4472 sdata->vif.bss_conf.sync_tsf = 0;
4473 sdata->vif.bss_conf.sync_device_ts = 0;
4474 sdata->vif.bss_conf.sync_dtim_count = 0;
4475 }
8cef2c9d 4476 rcu_read_unlock();
8c358bcd
JB		 4477
4478 /* tell driver about BSSID, basic rates and timing */
5d6a1b06 4479 ieee80211_bss_info_change_notify(sdata,
8c358bcd
JB		 4480 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
4481 BSS_CHANGED_BEACON_INT);
a1cf775d
JB		 4482
4483 if (assoc)
13e0c8e3 4484 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
a1cf775d 4485
13e0c8e3
JB		 4486 err = sta_info_insert(new_sta);
4487 new_sta = NULL;
a1cf775d 4488 if (err) {
bdcbd8e0
JB		 4489 sdata_info(sdata,
4490 "failed to insert STA entry for the AP (error %d)\n",
4491 err);
a1cf775d
JB		 4492 return err;
4493 }
4494 } else
b203ca39 4495 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
a1cf775d 4496
7d830a19
DS		 4497 /* Cancel scan to ensure that nothing interferes with connection */
4498 if (local->scanning)
4499 ieee80211_scan_cancel(local);
4500
a1cf775d
JB		 4501 return 0;
4502}
4503
77fdaa12
JB		 4504/* config hooks */
4505int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
4506 struct cfg80211_auth_request *req)
9c6bd790 4507{
66e67e41
JB		 4508 struct ieee80211_local *local = sdata->local;
4509 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4510 struct ieee80211_mgd_auth_data *auth_data;
77fdaa12 4511 u16 auth_alg;
66e67e41
JB		 4512 int err;
4513
4514 /* prepare auth data structure */
9c6bd790 4515
77fdaa12
JB		 4516 switch (req->auth_type) {
4517 case NL80211_AUTHTYPE_OPEN_SYSTEM:
4518 auth_alg = WLAN_AUTH_OPEN;
4519 break;
4520 case NL80211_AUTHTYPE_SHARED_KEY:
66e67e41 4521 if (IS_ERR(local->wep_tx_tfm))
9dca9c49 4522 return -EOPNOTSUPP;
77fdaa12
JB		 4523 auth_alg = WLAN_AUTH_SHARED_KEY;
4524 break;
4525 case NL80211_AUTHTYPE_FT:
4526 auth_alg = WLAN_AUTH_FT;
4527 break;
4528 case NL80211_AUTHTYPE_NETWORK_EAP:
4529 auth_alg = WLAN_AUTH_LEAP;
4530 break;
6b8ece3a
JM		 4531 case NL80211_AUTHTYPE_SAE:
4532 auth_alg = WLAN_AUTH_SAE;
4533 break;
77fdaa12
JB		 4534 default:
4535 return -EOPNOTSUPP;
60f8b39c 4536 }
77fdaa12 4537
6b8ece3a
JM		 4538 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
4539 req->ie_len, GFP_KERNEL);
66e67e41 4540 if (!auth_data)
9c6bd790 4541 return -ENOMEM;
77fdaa12 4542
66e67e41 4543 auth_data->bss = req->bss;
77fdaa12 4544
6b8ece3a
JM		 4545 if (req->sae_data_len >= 4) {
4546 __le16 *pos = (__le16 *) req->sae_data;
4547 auth_data->sae_trans = le16_to_cpu(pos[0]);
4548 auth_data->sae_status = le16_to_cpu(pos[1]);
4549 memcpy(auth_data->data, req->sae_data + 4,
4550 req->sae_data_len - 4);
4551 auth_data->data_len += req->sae_data_len - 4;
4552 }
4553
77fdaa12 4554 if (req->ie && req->ie_len) {
6b8ece3a
JM		 4555 memcpy(&auth_data->data[auth_data->data_len],
4556 req->ie, req->ie_len);
4557 auth_data->data_len += req->ie_len;
9c6bd790 4558 }
77fdaa12 4559
fffd0934 4560 if (req->key && req->key_len) {
66e67e41
JB		 4561 auth_data->key_len = req->key_len;
4562 auth_data->key_idx = req->key_idx;
4563 memcpy(auth_data->key, req->key, req->key_len);
fffd0934
JB		 4564 }
4565
66e67e41 4566 auth_data->algorithm = auth_alg;
60f8b39c 4567
66e67e41 4568 /* try to authenticate/probe */
2a33bee2 4569
66e67e41
JB		 4570 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4571 ifmgd->assoc_data) {
4572 err = -EBUSY;
4573 goto err_free;
2a33bee2
GE		 4574 }
4575
66e67e41
JB		 4576 if (ifmgd->auth_data)
4577 ieee80211_destroy_auth_data(sdata, false);
2a33bee2 4578
66e67e41
JB		 4579 /* prep auth_data so we don't go into idle on disassoc */
4580 ifmgd->auth_data = auth_data;
af6b6374 4581
7b119dc0
JB		 4582 if (ifmgd->associated) {
4583 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4584
4585 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4586 WLAN_REASON_UNSPECIFIED,
4587 false, frame_buf);
4588
a90faa9d
EG		 4589 ieee80211_report_disconnect(sdata, frame_buf,
4590 sizeof(frame_buf), true,
4591 WLAN_REASON_UNSPECIFIED);
7b119dc0 4592 }
af6b6374 4593
bdcbd8e0 4594 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
e5b900d2 4595
c1041f10 4596 err = ieee80211_prep_connection(sdata, req->bss, false, false);
a1cf775d 4597 if (err)
66e67e41 4598 goto err_clear;
af6b6374 4599
66e67e41
JB		 4600 err = ieee80211_probe_auth(sdata);
4601 if (err) {
66e67e41
JB		 4602 sta_info_destroy_addr(sdata, req->bss->bssid);
4603 goto err_clear;
4604 }
4605
4606 /* hold our own reference */
5b112d3d 4607 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
8d61ffa5 4608 return 0;
66e67e41
JB		 4609
4610 err_clear:
c84a67a2 4611 eth_zero_addr(ifmgd->bssid);
3d2abdfd 4612 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41 4613 ifmgd->auth_data = NULL;
d01f858c
MK		 4614 mutex_lock(&sdata->local->mtx);
4615 ieee80211_vif_release_channel(sdata);
4616 mutex_unlock(&sdata->local->mtx);
66e67e41
JB		 4617 err_free:
4618 kfree(auth_data);
66e67e41 4619 return err;
af6b6374
JB		 4620}
4621
095d81ce
JB		 4622static bool ieee80211_usable_wmm_params(struct ieee80211_sub_if_data *sdata,
4623 const u8 *wmm_param, int len)
4624{
4625 const u8 *pos;
4626 size_t left;
4627
4628 if (len < 8)
4629 return false;
4630
4631 if (wmm_param[5] != 1 /* version */)
4632 return false;
4633
4634 pos = wmm_param + 8;
4635 left = len - 8;
4636
4637 for (; left >= 4; left -= 4, pos += 4) {
4638 u8 aifsn = pos[0] & 0x0f;
4639 u8 ecwmin = pos[1] & 0x0f;
4640 u8 ecwmax = (pos[1] & 0xf0) >> 4;
4641 int aci = (pos[0] >> 5) & 0x03;
4642
4643 if (aifsn < 2) {
4644 sdata_info(sdata,
4645 "AP has invalid WMM params (AIFSN=%d for ACI %d), disabling WMM\n",
4646 aifsn, aci);
4647 return false;
4648 }
4649 if (ecwmin > ecwmax) {
4650 sdata_info(sdata,
4651 "AP has invalid WMM params (ECWmin/max=%d/%d for ACI %d), disabling WMM\n",
4652 ecwmin, ecwmax, aci);
4653 return false;
4654 }
4655 }
4656
4657 return true;
4658}
4659
77fdaa12
JB		 4660int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4661 struct cfg80211_assoc_request *req)
f0706e82 4662{
66e67e41 4663 struct ieee80211_local *local = sdata->local;
77fdaa12 4664 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
0c1ad2ca 4665 struct ieee80211_bss *bss = (void *)req->bss->priv;
66e67e41 4666 struct ieee80211_mgd_assoc_data *assoc_data;
c65dd147 4667 const struct cfg80211_bss_ies *beacon_ies;
4e74bfdb 4668 struct ieee80211_supported_band *sband;
b08fbbd8 4669 const u8 *ssidie, *ht_ie, *vht_ie;
2a33bee2 4670 int i, err;
c1041f10 4671 bool override = false;
f0706e82 4672
66e67e41
JB		 4673 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4674 if (!assoc_data)
4675 return -ENOMEM;
4676
9caf0364
JB		 4677 rcu_read_lock();
4678 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4679 if (!ssidie) {
4680 rcu_read_unlock();
4681 kfree(assoc_data);
4682 return -EINVAL;
4683 }
4684 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4685 assoc_data->ssid_len = ssidie[1];
4686 rcu_read_unlock();
4687
7b119dc0
JB		 4688 if (ifmgd->associated) {
4689 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4690
4691 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4692 WLAN_REASON_UNSPECIFIED,
4693 false, frame_buf);
4694
a90faa9d
EG		 4695 ieee80211_report_disconnect(sdata, frame_buf,
4696 sizeof(frame_buf), true,
4697 WLAN_REASON_UNSPECIFIED);
7b119dc0 4698 }
66e67e41
JB		 4699
4700 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4701 err = -EBUSY;
4702 goto err_free;
af6b6374 4703 }
77fdaa12 4704
66e67e41
JB		 4705 if (ifmgd->assoc_data) {
4706 err = -EBUSY;
4707 goto err_free;
4708 }
77fdaa12 4709
66e67e41
JB		 4710 if (ifmgd->auth_data) {
4711 bool match;
4712
4713 /* keep sta info, bssid if matching */
b203ca39 4714 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
66e67e41 4715 ieee80211_destroy_auth_data(sdata, match);
2a33bee2
GE		 4716 }
4717
66e67e41 4718 /* prepare assoc data */
095d81ce 4719
d8ec4433
JO		 4720 ifmgd->beacon_crc_valid = false;
4721
095d81ce
JB		 4722 assoc_data->wmm = bss->wmm_used &&
4723 (local->hw.queues >= IEEE80211_NUM_ACS);
4724 if (assoc_data->wmm) {
4725 /* try to check validity of WMM params IE */
4726 const struct cfg80211_bss_ies *ies;
4727 const u8 *wp, *start, *end;
4728
4729 rcu_read_lock();
4730 ies = rcu_dereference(req->bss->ies);
4731 start = ies->data;
4732 end = start + ies->len;
4733
4734 while (true) {
4735 wp = cfg80211_find_vendor_ie(
4736 WLAN_OUI_MICROSOFT,
4737 WLAN_OUI_TYPE_MICROSOFT_WMM,
4738 start, end - start);
4739 if (!wp)
4740 break;
4741 start = wp + wp[1] + 2;
4742 /* if this IE is too short, try the next */
4743 if (wp[1] <= 4)
4744 continue;
4745 /* if this IE is WMM params, we found what we wanted */
4746 if (wp[6] == 1)
4747 break;
4748 }
4749
4750 if (!wp || !ieee80211_usable_wmm_params(sdata, wp + 2,
4751 wp[1] - 2)) {
4752 assoc_data->wmm = false;
4753 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
4754 }
4755 rcu_read_unlock();
4756 }
4757
de5036aa
JB		 4758 /*
4759 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4760 * We still associate in non-HT mode (11a/b/g) if any one of these
4761 * ciphers is configured as pairwise.
4762 * We can set this to true for non-11n hardware, that'll be checked
4763 * separately along with the peer capabilities.
4764 */
1c4cb928 4765 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
77fdaa12
JB		 4766 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4767 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
1c4cb928 4768 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
a8243b72 4769 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
d545daba 4770 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
1c4cb928 4771 netdev_info(sdata->dev,
d545daba 4772 "disabling HT/VHT due to WEP/TKIP use\n");
1c4cb928
JB		 4773 }
4774 }
77fdaa12 4775
4e74bfdb
JB		 4776 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4777 sband = local->hw.wiphy->bands[req->bss->channel->band];
4778 if (!sband->ht_cap.ht_supported ||
095d81ce
JB		 4779 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4780 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
a8243b72 4781 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
095d81ce
JB		 4782 if (!bss->wmm_used &&
4783 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
1b49de26
JB		 4784 netdev_info(sdata->dev,
4785 "disabling HT as WMM/QoS is not supported by the AP\n");
1c4cb928 4786 }
4e74bfdb 4787
d545daba
MP		 4788 /* disable VHT if we don't support it or the AP doesn't use WMM */
4789 if (!sband->vht_cap.vht_supported ||
095d81ce
JB		 4790 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
4791 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
d545daba 4792 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
095d81ce
JB		 4793 if (!bss->wmm_used &&
4794 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
1b49de26
JB		 4795 netdev_info(sdata->dev,
4796 "disabling VHT as WMM/QoS is not supported by the AP\n");
d545daba
MP		 4797 }
4798
ef96a842
BG		 4799 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4800 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4801 sizeof(ifmgd->ht_capa_mask));
4802
dd5ecfea
JB		 4803 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4804 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4805 sizeof(ifmgd->vht_capa_mask));
4806
77fdaa12 4807 if (req->ie && req->ie_len) {
66e67e41
JB		 4808 memcpy(assoc_data->ie, req->ie, req->ie_len);
4809 assoc_data->ie_len = req->ie_len;
4810 }
f679f65d 4811
66e67e41 4812 assoc_data->bss = req->bss;
f679f65d 4813
af6b6374
JB		 4814 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4815 if (ifmgd->powersave)
04ecd257 4816 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
af6b6374 4817 else
04ecd257 4818 sdata->smps_mode = IEEE80211_SMPS_OFF;
af6b6374 4819 } else
04ecd257 4820 sdata->smps_mode = ifmgd->req_smps;
af6b6374 4821
66e67e41 4822 assoc_data->capability = req->bss->capability;
66e67e41
JB		 4823 assoc_data->supp_rates = bss->supp_rates;
4824 assoc_data->supp_rates_len = bss->supp_rates_len;
9dde6423 4825
9caf0364 4826 rcu_read_lock();
9dde6423
JB		 4827 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4828 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4829 assoc_data->ap_ht_param =
4830 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4831 else
a8243b72 4832 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
b08fbbd8
JB		 4833 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4834 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4835 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4836 sizeof(struct ieee80211_vht_cap));
4837 else
4838 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
9caf0364 4839 rcu_read_unlock();
63f170e0 4840
848955cc 4841 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
30686bf7 4842 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK),
848955cc
JB		 4843 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
4844 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
4845
ab13315a 4846 if (bss->wmm_used && bss->uapsd_supported &&
848955cc 4847 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
76f0303d 4848 assoc_data->uapsd = true;
ab13315a
KV		 4849 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4850 } else {
76f0303d 4851 assoc_data->uapsd = false;
ab13315a
KV		 4852 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4853 }
4854
77fdaa12 4855 if (req->prev_bssid)
66e67e41 4856 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
77fdaa12
JB		 4857
4858 if (req->use_mfp) {
4859 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4860 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4861 } else {
4862 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4863 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4864 }
4865
cd2f5dd7
AK		 4866 if (req->flags & ASSOC_REQ_USE_RRM)
4867 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
4868 else
4869 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
4870
77fdaa12
JB		 4871 if (req->crypto.control_port)
4872 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4873 else
4874 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4875
a621fa4d
JB		 4876 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4877 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
2475b1cc
MS		 4878 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
4879 sdata->vif.type);
a621fa4d 4880
66e67e41
JB		 4881 /* kick off associate process */
4882
4883 ifmgd->assoc_data = assoc_data;
826262c3 4884 ifmgd->dtim_period = 0;
989c6505 4885 ifmgd->have_beacon = false;
66e67e41 4886
c1041f10
CRI		 4887 /* override HT/VHT configuration only if the AP and we support it */
4888 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
4889 struct ieee80211_sta_ht_cap sta_ht_cap;
4890
4891 if (req->flags & ASSOC_REQ_DISABLE_HT)
4892 override = true;
4893
4894 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
4895 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
4896
4897 /* check for 40 MHz disable override */
4898 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) &&
4899 sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
4900 !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
4901 override = true;
4902
4903 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
4904 req->flags & ASSOC_REQ_DISABLE_VHT)
4905 override = true;
4906 }
4907
4908 if (req->flags & ASSOC_REQ_DISABLE_HT) {
4909 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4910 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4911 }
4912
4913 if (req->flags & ASSOC_REQ_DISABLE_VHT)
4914 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4915
4916 err = ieee80211_prep_connection(sdata, req->bss, true, override);
a1cf775d
JB		 4917 if (err)
4918 goto err_clear;
66e67e41 4919
c65dd147
EG		 4920 rcu_read_lock();
4921 beacon_ies = rcu_dereference(req->bss->beacon_ies);
826262c3 4922
30686bf7 4923 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) &&
c65dd147
EG		 4924 !beacon_ies) {
4925 /*
4926 * Wait up to one beacon interval ...
4927 * should this be more if we miss one?
4928 */
4929 sdata_info(sdata, "waiting for beacon from %pM\n",
4930 ifmgd->bssid);
4931 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
89afe614 4932 assoc_data->timeout_started = true;
c65dd147
EG		 4933 assoc_data->need_beacon = true;
4934 } else if (beacon_ies) {
4935 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4936 beacon_ies->data,
4937 beacon_ies->len);
ef429dad
JB		 4938 u8 dtim_count = 0;
4939
c65dd147
EG		 4940 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4941 const struct ieee80211_tim_ie *tim;
4942 tim = (void *)(tim_ie + 2);
4943 ifmgd->dtim_period = tim->dtim_period;
ef429dad 4944 dtim_count = tim->dtim_count;
826262c3 4945 }
989c6505 4946 ifmgd->have_beacon = true;
66e67e41 4947 assoc_data->timeout = jiffies;
89afe614 4948 assoc_data->timeout_started = true;
ef429dad 4949
30686bf7 4950 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
ef429dad
JB		 4951 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4952 sdata->vif.bss_conf.sync_device_ts =
4953 bss->device_ts_beacon;
4954 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4955 }
c65dd147
EG		 4956 } else {
4957 assoc_data->timeout = jiffies;
89afe614 4958 assoc_data->timeout_started = true;
66e67e41 4959 }
c65dd147
EG		 4960 rcu_read_unlock();
4961
8d61ffa5 4962 run_again(sdata, assoc_data->timeout);
66e67e41 4963
fcff4f10
PS		 4964 if (bss->corrupt_data) {
4965 char *corrupt_type = "data";
4966 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4967 if (bss->corrupt_data &
4968 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4969 corrupt_type = "beacon and probe response";
4970 else
4971 corrupt_type = "beacon";
4972 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4973 corrupt_type = "probe response";
bdcbd8e0
JB		 4974 sdata_info(sdata, "associating with AP with corrupt %s\n",
4975 corrupt_type);
fcff4f10
PS		 4976 }
4977
8d61ffa5 4978 return 0;
66e67e41 4979 err_clear:
c84a67a2 4980 eth_zero_addr(ifmgd->bssid);
3d2abdfd 4981 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
66e67e41
JB		 4982 ifmgd->assoc_data = NULL;
4983 err_free:
4984 kfree(assoc_data);
66e67e41 4985 return err;
f0706e82
JB		 4986}
4987
77fdaa12 4988int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
63c9c5e7 4989 struct cfg80211_deauth_request *req)
f0706e82 4990{
46900298 4991 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
6ae16775 4992 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
6863255b 4993 bool tx = !req->local_state_change;
f0706e82 4994
c9c3a060
JB		 4995 if (ifmgd->auth_data &&
4996 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
4997 sdata_info(sdata,
4998 "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
4999 req->bssid, req->reason_code,
5000 ieee80211_get_reason_code_string(req->reason_code));
0ff71613 5001
8c7d857c 5002 drv_mgd_prepare_tx(sdata->local, sdata);
37ad3888
JB		 5003 ieee80211_send_deauth_disassoc(sdata, req->bssid,
5004 IEEE80211_STYPE_DEAUTH,
6863255b 5005 req->reason_code, tx,
37ad3888 5006 frame_buf);
86552017 5007 ieee80211_destroy_auth_data(sdata, false);
a90faa9d
EG		 5008 ieee80211_report_disconnect(sdata, frame_buf,
5009 sizeof(frame_buf), true,
5010 req->reason_code);
86552017 5011
c9c3a060 5012 return 0;
8c7d857c
EG		 5013 }
5014
86552017
JB		 5015 if (ifmgd->associated &&
5016 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
c9c3a060
JB		 5017 sdata_info(sdata,
5018 "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
5019 req->bssid, req->reason_code,
5020 ieee80211_get_reason_code_string(req->reason_code));
5021
86552017
JB		 5022 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
5023 req->reason_code, tx, frame_buf);
a90faa9d
EG		 5024 ieee80211_report_disconnect(sdata, frame_buf,
5025 sizeof(frame_buf), true,
5026 req->reason_code);
c9c3a060
JB		 5027 return 0;
5028 }
86552017 5029
c9c3a060 5030 return -ENOTCONN;
f0706e82 5031}
84363e6e 5032
77fdaa12 5033int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
63c9c5e7 5034 struct cfg80211_disassoc_request *req)
9c6bd790 5035{
77fdaa12 5036 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
e69e95db 5037 u8 bssid[ETH_ALEN];
6ae16775 5038 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
9c6bd790 5039
8d8b261a
JB		 5040 /*
5041 * cfg80211 should catch this ... but it's racy since
5042 * we can receive a disassoc frame, process it, hand it
5043 * to cfg80211 while that's in a locked section already
5044 * trying to tell us that the user wants to disconnect.
5045 */
8d61ffa5 5046 if (ifmgd->associated != req->bss)
77fdaa12 5047 return -ENOLINK;
77fdaa12 5048
bdcbd8e0 5049 sdata_info(sdata,
dfa1ad29
CO		 5050 "disassociating from %pM by local choice (Reason: %u=%s)\n",
5051 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
0ff71613 5052
e69e95db 5053 memcpy(bssid, req->bss->bssid, ETH_ALEN);
37ad3888
JB		 5054 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
5055 req->reason_code, !req->local_state_change,
5056 frame_buf);
10f644a4 5057
a90faa9d
EG		 5058 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
5059 req->reason_code);
bc83b681 5060
10f644a4
JB		 5061 return 0;
5062}
026331c4 5063
afa762f6 5064void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
54e4ffb2
JB		 5065{
5066 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
5067
49921859
BG		 5068 /*
5069 * Make sure some work items will not run after this,
5070 * they will not do anything but might not have been
5071 * cancelled when disconnecting.
5072 */
5073 cancel_work_sync(&ifmgd->monitor_work);
5074 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
5075 cancel_work_sync(&ifmgd->request_smps_work);
5076 cancel_work_sync(&ifmgd->csa_connection_drop_work);
5077 cancel_work_sync(&ifmgd->chswitch_work);
81dd2b88 5078 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
49921859 5079
8d61ffa5 5080 sdata_lock(sdata);
959867fa
JB		 5081 if (ifmgd->assoc_data) {
5082 struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
54e4ffb2 5083 ieee80211_destroy_assoc_data(sdata, false);
959867fa
JB		 5084 cfg80211_assoc_timeout(sdata->dev, bss);
5085 }
54e4ffb2
JB		 5086 if (ifmgd->auth_data)
5087 ieee80211_destroy_auth_data(sdata, false);
1277b4a9
LK		 5088 spin_lock_bh(&ifmgd->teardown_lock);
5089 if (ifmgd->teardown_skb) {
5090 kfree_skb(ifmgd->teardown_skb);
5091 ifmgd->teardown_skb = NULL;
5092 ifmgd->orig_teardown_skb = NULL;
5093 }
5094 spin_unlock_bh(&ifmgd->teardown_lock);
54e4ffb2 5095 del_timer_sync(&ifmgd->timer);
8d61ffa5 5096 sdata_unlock(sdata);
54e4ffb2
JB		 5097}
5098
a97c13c3
JO		 5099void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
5100 enum nl80211_cqm_rssi_threshold_event rssi_event,
5101 gfp_t gfp)
5102{
5103 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5104
b5878a2d
JB		 5105 trace_api_cqm_rssi_notify(sdata, rssi_event);
5106
a97c13c3
JO		 5107 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
5108}
5109EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
98f03342
JB		 5110
5111void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
5112{
5113 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5114
5115 trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
5116
5117 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
5118}
5119EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);
Linux kernel - Deliverables
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